diff --git a/ci/srht/freebsd_script b/ci/srht/freebsd_script
index fb4a5d357e..6c8fd50a07 100755
--- a/ci/srht/freebsd_script
+++ b/ci/srht/freebsd_script
@@ -3,13 +3,6 @@
 set -x
 set -e
 
-# The following line can be removed as soon as FreeBSD fixes
-# their packaging glitch. If not fixed by March 15, 2020
-# there is something wrong. Should be fixed much sooner.
-# note: this will cause some complaints when running
-# pkg commands but let's ignore them.
-sudo rm /usr/local/etc/pkg/repos/FreeBSD.conf
-
 sudo pkg update -fq
 sudo pkg install -y cmake py27-s3cmd wget curl jq
 
diff --git a/doc/docgen.zig b/doc/docgen.zig
index 319d9e0035..4d2625f54f 100644
--- a/doc/docgen.zig
+++ b/doc/docgen.zig
@@ -40,12 +40,9 @@ pub fn main() !void {
     var out_file = try fs.cwd().createFile(out_file_name, .{});
     defer out_file.close();
 
-    var file_in_stream = in_file.inStream();
+    const input_file_bytes = try in_file.inStream().readAllAlloc(allocator, max_doc_file_size);
 
-    const input_file_bytes = try file_in_stream.stream.readAllAlloc(allocator, max_doc_file_size);
-
-    var file_out_stream = out_file.outStream();
-    var buffered_out_stream = io.BufferedOutStream(fs.File.WriteError).init(&file_out_stream.stream);
+    var buffered_out_stream = io.bufferedOutStream(out_file.outStream());
 
     var tokenizer = Tokenizer.init(in_file_name, input_file_bytes);
     var toc = try genToc(allocator, &tokenizer);
@@ -53,7 +50,7 @@ pub fn main() !void {
     try fs.cwd().makePath(tmp_dir_name);
     defer fs.deleteTree(tmp_dir_name) catch {};
 
-    try genHtml(allocator, &tokenizer, &toc, &buffered_out_stream.stream, zig_exe);
+    try genHtml(allocator, &tokenizer, &toc, buffered_out_stream.outStream(), zig_exe);
     try buffered_out_stream.flush();
 }
 
@@ -327,8 +324,7 @@ fn genToc(allocator: *mem.Allocator, tokenizer: *Tokenizer) !Toc {
     var toc_buf = try std.Buffer.initSize(allocator, 0);
     defer toc_buf.deinit();
 
-    var toc_buf_adapter = io.BufferOutStream.init(&toc_buf);
-    var toc = &toc_buf_adapter.stream;
+    var toc = toc_buf.outStream();
 
     var nodes = std.ArrayList(Node).init(allocator);
     defer nodes.deinit();
@@ -342,7 +338,7 @@ fn genToc(allocator: *mem.Allocator, tokenizer: *Tokenizer) !Toc {
                 if (header_stack_size != 0) {
                     return parseError(tokenizer, token, "unbalanced headers", .{});
                 }
-                try toc.write("    </ul>\n");
+                try toc.writeAll("    </ul>\n");
                 break;
             },
             Token.Id.Content => {
@@ -407,7 +403,7 @@ fn genToc(allocator: *mem.Allocator, tokenizer: *Tokenizer) !Toc {
                         if (last_columns) |n| {
                             try toc.print("<ul style=\"columns: {}\">\n", .{n});
                         } else {
-                            try toc.write("<ul>\n");
+                            try toc.writeAll("<ul>\n");
                         }
                     } else {
                         last_action = Action.Open;
@@ -424,9 +420,9 @@ fn genToc(allocator: *mem.Allocator, tokenizer: *Tokenizer) !Toc {
 
                     if (last_action == Action.Close) {
                         try toc.writeByteNTimes(' ', 8 + header_stack_size * 4);
-                        try toc.write("</ul></li>\n");
+                        try toc.writeAll("</ul></li>\n");
                     } else {
-                        try toc.write("</li>\n");
+                        try toc.writeAll("</li>\n");
                         last_action = Action.Close;
                     }
                 } else if (mem.eql(u8, tag_name, "see_also")) {
@@ -614,8 +610,7 @@ fn urlize(allocator: *mem.Allocator, input: []const u8) ![]u8 {
     var buf = try std.Buffer.initSize(allocator, 0);
     defer buf.deinit();
 
-    var buf_adapter = io.BufferOutStream.init(&buf);
-    var out = &buf_adapter.stream;
+    const out = buf.outStream();
     for (input) |c| {
         switch (c) {
             'a'...'z', 'A'...'Z', '_', '-', '0'...'9' => {
@@ -634,8 +629,7 @@ fn escapeHtml(allocator: *mem.Allocator, input: []const u8) ![]u8 {
     var buf = try std.Buffer.initSize(allocator, 0);
     defer buf.deinit();
 
-    var buf_adapter = io.BufferOutStream.init(&buf);
-    var out = &buf_adapter.stream;
+    const out = buf.outStream();
     try writeEscaped(out, input);
     return buf.toOwnedSlice();
 }
@@ -643,10 +637,10 @@ fn escapeHtml(allocator: *mem.Allocator, input: []const u8) ![]u8 {
 fn writeEscaped(out: var, input: []const u8) !void {
     for (input) |c| {
         try switch (c) {
-            '&' => out.write("&amp;"),
-            '<' => out.write("&lt;"),
-            '>' => out.write("&gt;"),
-            '"' => out.write("&quot;"),
+            '&' => out.writeAll("&amp;"),
+            '<' => out.writeAll("&lt;"),
+            '>' => out.writeAll("&gt;"),
+            '"' => out.writeAll("&quot;"),
             else => out.writeByte(c),
         };
     }
@@ -681,8 +675,7 @@ fn termColor(allocator: *mem.Allocator, input: []const u8) ![]u8 {
     var buf = try std.Buffer.initSize(allocator, 0);
     defer buf.deinit();
 
-    var buf_adapter = io.BufferOutStream.init(&buf);
-    var out = &buf_adapter.stream;
+    var out = buf.outStream();
     var number_start_index: usize = undefined;
     var first_number: usize = undefined;
     var second_number: usize = undefined;
@@ -743,7 +736,7 @@ fn termColor(allocator: *mem.Allocator, input: []const u8) ![]u8 {
                 'm' => {
                     state = TermState.Start;
                     while (open_span_count != 0) : (open_span_count -= 1) {
-                        try out.write("</span>");
+                        try out.writeAll("</span>");
                     }
                     if (first_number != 0 or second_number != 0) {
                         try out.print("<span class=\"t{}_{}\">", .{ first_number, second_number });
@@ -774,7 +767,7 @@ fn isType(name: []const u8) bool {
 
 fn tokenizeAndPrintRaw(docgen_tokenizer: *Tokenizer, out: var, source_token: Token, raw_src: []const u8) !void {
     const src = mem.trim(u8, raw_src, " \n");
-    try out.write("<code class=\"zig\">");
+    try out.writeAll("<code class=\"zig\">");
     var tokenizer = std.zig.Tokenizer.init(src);
     var index: usize = 0;
     var next_tok_is_fn = false;
@@ -835,15 +828,15 @@ fn tokenizeAndPrintRaw(docgen_tokenizer: *Tokenizer, out: var, source_token: Tok
             .Keyword_allowzero,
             .Keyword_while,
             => {
-                try out.write("<span class=\"tok-kw\">");
+                try out.writeAll("<span class=\"tok-kw\">");
                 try writeEscaped(out, src[token.start..token.end]);
-                try out.write("</span>");
+                try out.writeAll("</span>");
             },
 
             .Keyword_fn => {
-                try out.write("<span class=\"tok-kw\">");
+                try out.writeAll("<span class=\"tok-kw\">");
                 try writeEscaped(out, src[token.start..token.end]);
-                try out.write("</span>");
+                try out.writeAll("</span>");
                 next_tok_is_fn = true;
             },
 
@@ -852,24 +845,24 @@ fn tokenizeAndPrintRaw(docgen_tokenizer: *Tokenizer, out: var, source_token: Tok
             .Keyword_true,
             .Keyword_false,
             => {
-                try out.write("<span class=\"tok-null\">");
+                try out.writeAll("<span class=\"tok-null\">");
                 try writeEscaped(out, src[token.start..token.end]);
-                try out.write("</span>");
+                try out.writeAll("</span>");
             },
 
             .StringLiteral,
             .MultilineStringLiteralLine,
             .CharLiteral,
             => {
-                try out.write("<span class=\"tok-str\">");
+                try out.writeAll("<span class=\"tok-str\">");
                 try writeEscaped(out, src[token.start..token.end]);
-                try out.write("</span>");
+                try out.writeAll("</span>");
             },
 
             .Builtin => {
-                try out.write("<span class=\"tok-builtin\">");
+                try out.writeAll("<span class=\"tok-builtin\">");
                 try writeEscaped(out, src[token.start..token.end]);
-                try out.write("</span>");
+                try out.writeAll("</span>");
             },
 
             .LineComment,
@@ -877,16 +870,16 @@ fn tokenizeAndPrintRaw(docgen_tokenizer: *Tokenizer, out: var, source_token: Tok
             .ContainerDocComment,
             .ShebangLine,
             => {
-                try out.write("<span class=\"tok-comment\">");
+                try out.writeAll("<span class=\"tok-comment\">");
                 try writeEscaped(out, src[token.start..token.end]);
-                try out.write("</span>");
+                try out.writeAll("</span>");
             },
 
             .Identifier => {
                 if (prev_tok_was_fn) {
-                    try out.write("<span class=\"tok-fn\">");
+                    try out.writeAll("<span class=\"tok-fn\">");
                     try writeEscaped(out, src[token.start..token.end]);
-                    try out.write("</span>");
+                    try out.writeAll("</span>");
                 } else {
                     const is_int = blk: {
                         if (src[token.start] != 'i' and src[token.start] != 'u')
@@ -901,9 +894,9 @@ fn tokenizeAndPrintRaw(docgen_tokenizer: *Tokenizer, out: var, source_token: Tok
                         break :blk true;
                     };
                     if (is_int or isType(src[token.start..token.end])) {
-                        try out.write("<span class=\"tok-type\">");
+                        try out.writeAll("<span class=\"tok-type\">");
                         try writeEscaped(out, src[token.start..token.end]);
-                        try out.write("</span>");
+                        try out.writeAll("</span>");
                     } else {
                         try writeEscaped(out, src[token.start..token.end]);
                     }
@@ -913,9 +906,9 @@ fn tokenizeAndPrintRaw(docgen_tokenizer: *Tokenizer, out: var, source_token: Tok
             .IntegerLiteral,
             .FloatLiteral,
             => {
-                try out.write("<span class=\"tok-number\">");
+                try out.writeAll("<span class=\"tok-number\">");
                 try writeEscaped(out, src[token.start..token.end]);
-                try out.write("</span>");
+                try out.writeAll("</span>");
             },
 
             .Bang,
@@ -983,7 +976,7 @@ fn tokenizeAndPrintRaw(docgen_tokenizer: *Tokenizer, out: var, source_token: Tok
         }
         index = token.end;
     }
-    try out.write("</code>");
+    try out.writeAll("</code>");
 }
 
 fn tokenizeAndPrint(docgen_tokenizer: *Tokenizer, out: var, source_token: Token) !void {
@@ -1002,7 +995,7 @@ fn genHtml(allocator: *mem.Allocator, tokenizer: *Tokenizer, toc: *Toc, out: var
     for (toc.nodes) |node| {
         switch (node) {
             .Content => |data| {
-                try out.write(data);
+                try out.writeAll(data);
             },
             .Link => |info| {
                 if (!toc.urls.contains(info.url)) {
@@ -1011,12 +1004,12 @@ fn genHtml(allocator: *mem.Allocator, tokenizer: *Tokenizer, toc: *Toc, out: var
                 try out.print("<a href=\"#{}\">{}</a>", .{ info.url, info.name });
             },
             .Nav => {
-                try out.write(toc.toc);
+                try out.writeAll(toc.toc);
             },
             .Builtin => |tok| {
-                try out.write("<pre>");
+                try out.writeAll("<pre>");
                 try tokenizeAndPrintRaw(tokenizer, out, tok, builtin_code);
-                try out.write("</pre>");
+                try out.writeAll("</pre>");
             },
             .HeaderOpen => |info| {
                 try out.print(
@@ -1025,7 +1018,7 @@ fn genHtml(allocator: *mem.Allocator, tokenizer: *Tokenizer, toc: *Toc, out: var
                 );
             },
             .SeeAlso => |items| {
-                try out.write("<p>See also:</p><ul>\n");
+                try out.writeAll("<p>See also:</p><ul>\n");
                 for (items) |item| {
                     const url = try urlize(allocator, item.name);
                     if (!toc.urls.contains(url)) {
@@ -1033,7 +1026,7 @@ fn genHtml(allocator: *mem.Allocator, tokenizer: *Tokenizer, toc: *Toc, out: var
                     }
                     try out.print("<li><a href=\"#{}\">{}</a></li>\n", .{ url, item.name });
                 }
-                try out.write("</ul>\n");
+                try out.writeAll("</ul>\n");
             },
             .Syntax => |content_tok| {
                 try tokenizeAndPrint(tokenizer, out, content_tok);
@@ -1047,9 +1040,9 @@ fn genHtml(allocator: *mem.Allocator, tokenizer: *Tokenizer, toc: *Toc, out: var
                 if (!code.is_inline) {
                     try out.print("<p class=\"file\">{}.zig</p>", .{code.name});
                 }
-                try out.write("<pre>");
+                try out.writeAll("<pre>");
                 try tokenizeAndPrint(tokenizer, out, code.source_token);
-                try out.write("</pre>");
+                try out.writeAll("</pre>");
                 const name_plus_ext = try std.fmt.allocPrint(allocator, "{}.zig", .{code.name});
                 const tmp_source_file_name = try fs.path.join(
                     allocator,
diff --git a/doc/langref.html.in b/doc/langref.html.in
index a39f73cf96..83e96d5c95 100644
--- a/doc/langref.html.in
+++ b/doc/langref.html.in
@@ -230,7 +230,7 @@
 const std = @import("std");
 
 pub fn main() !void {
-    const stdout = &std.io.getStdOut().outStream().stream;
+    const stdout = std.io.getStdOut().outStream();
     try stdout.print("Hello, {}!\n", .{"world"});
 }
       {#code_end#}
@@ -6728,17 +6728,8 @@ async fn func(y: *i32) void {
       This builtin function atomically dereferences a pointer and returns the value.
       </p>
       <p>
-      {#syntax#}T{#endsyntax#} must be a pointer type, a {#syntax#}bool{#endsyntax#}, a float,
-      an integer whose bit count meets these requirements:
-      </p>
-      <ul>
-          <li>At least 8</li>
-          <li>At most the same as usize</li>
-          <li>Power of 2</li>
-      </ul> or an enum with a valid integer tag type.
-      <p>
-      TODO right now bool is not accepted. Also I think we could make non powers of 2 work fine, maybe
-      we can remove this restriction
+      {#syntax#}T{#endsyntax#} must be a {#syntax#}bool{#endsyntax#}, a float,
+      an integer or an enum.
       </p>
       {#header_close#}
       {#header_open|@atomicRmw#}
@@ -6747,17 +6738,8 @@ async fn func(y: *i32) void {
       This builtin function atomically modifies memory and then returns the previous value.
       </p>
       <p>
-      {#syntax#}T{#endsyntax#} must be a pointer type, a {#syntax#}bool{#endsyntax#},
-      or an integer whose bit count meets these requirements:
-      </p>
-      <ul>
-          <li>At least 8</li>
-          <li>At most the same as usize</li>
-          <li>Power of 2</li>
-      </ul>
-      <p>
-      TODO right now bool is not accepted. Also I think we could make non powers of 2 work fine, maybe
-      we can remove this restriction
+      {#syntax#}T{#endsyntax#} must be a {#syntax#}bool{#endsyntax#}, a float,
+      an integer or an enum.
       </p>
       <p>
       Supported operations:
@@ -6782,17 +6764,8 @@ async fn func(y: *i32) void {
       This builtin function atomically stores a value.
       </p>
       <p>
-      {#syntax#}T{#endsyntax#} must be a pointer type, a {#syntax#}bool{#endsyntax#}, a float,
-      an integer whose bit count meets these requirements:
-      </p>
-      <ul>
-          <li>At least 8</li>
-          <li>At most the same as usize</li>
-          <li>Power of 2</li>
-      </ul> or an enum with a valid integer tag type.
-      <p>
-      TODO right now bool is not accepted. Also I think we could make non powers of 2 work fine, maybe
-      we can remove this restriction
+      {#syntax#}T{#endsyntax#} must be a {#syntax#}bool{#endsyntax#}, a float,
+      an integer or an enum.
       </p>
       {#header_close#}
       {#header_open|@bitCast#}
@@ -7074,7 +7047,8 @@ fn cmpxchgStrongButNotAtomic(comptime T: type, ptr: *T, expected_value: T, new_v
       more efficiently in machine instructions.
       </p>
       <p>
-      {#syntax#}AtomicOrder{#endsyntax#} can be found with {#syntax#}@import("builtin").AtomicOrder{#endsyntax#}.
+      {#syntax#}T{#endsyntax#} must be a {#syntax#}bool{#endsyntax#}, a float,
+      an integer or an enum.
       </p>
       <p>{#syntax#}@TypeOf(ptr).alignment{#endsyntax#} must be {#syntax#}>= @sizeOf(T).{#endsyntax#}</p>
       {#see_also|Compile Variables|cmpxchgWeak#}
@@ -7102,7 +7076,8 @@ fn cmpxchgWeakButNotAtomic(comptime T: type, ptr: *T, expected_value: T, new_val
       However if you need a stronger guarantee, use {#link|@cmpxchgStrong#}.
       </p>
       <p>
-      {#syntax#}AtomicOrder{#endsyntax#} can be found with {#syntax#}@import("builtin").AtomicOrder{#endsyntax#}.
+      {#syntax#}T{#endsyntax#} must be a {#syntax#}bool{#endsyntax#}, a float,
+      an integer or an enum.
       </p>
       <p>{#syntax#}@TypeOf(ptr).alignment{#endsyntax#} must be {#syntax#}>= @sizeOf(T).{#endsyntax#}</p>
       {#see_also|Compile Variables|cmpxchgStrong#}
diff --git a/lib/libc/include/aarch64-linux-musl/bits/alltypes.h b/lib/libc/include/aarch64-linux-musl/bits/alltypes.h
index 0ee3cb4646..fd60fe3a0f 100644
--- a/lib/libc/include/aarch64-linux-musl/bits/alltypes.h
+++ b/lib/libc/include/aarch64-linux-musl/bits/alltypes.h
@@ -2,16 +2,13 @@
 #define _Int64 long
 #define _Reg long
 
-#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
-typedef __builtin_va_list va_list;
-#define __DEFINED_va_list
-#endif
-
-#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
-typedef __builtin_va_list __isoc_va_list;
-#define __DEFINED___isoc_va_list
+#if __AARCH64EB__
+#define __BYTE_ORDER 4321
+#else
+#define __BYTE_ORDER 1234
 #endif
 
+#define __LONG_MAX 0x7fffffffffffffffL
 
 #ifndef __cplusplus
 #if defined(__NEED_wchar_t) && !defined(__DEFINED_wchar_t)
@@ -53,52 +50,9 @@ typedef struct { long long __ll; long double __ld; } max_align_t;
 #define __DEFINED_max_align_t
 #endif
 
-
-#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
-typedef long time_t;
-#define __DEFINED_time_t
-#endif
-
-#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
-typedef long suseconds_t;
-#define __DEFINED_suseconds_t
-#endif
-
-
-#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
-typedef struct { union { int __i[14]; volatile int __vi[14]; unsigned long __s[7]; } __u; } pthread_attr_t;
-#define __DEFINED_pthread_attr_t
-#endif
-
-#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
-typedef struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } pthread_mutex_t;
-#define __DEFINED_pthread_mutex_t
-#endif
-
-#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
-typedef struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } mtx_t;
-#define __DEFINED_mtx_t
-#endif
-
-#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } pthread_cond_t;
-#define __DEFINED_pthread_cond_t
-#endif
-
-#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } cnd_t;
-#define __DEFINED_cnd_t
-#endif
-
-#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
-typedef struct { union { int __i[14]; volatile int __vi[14]; void *__p[7]; } __u; } pthread_rwlock_t;
-#define __DEFINED_pthread_rwlock_t
-#endif
-
-#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
-typedef struct { union { int __i[8]; volatile int __vi[8]; void *__p[4]; } __u; } pthread_barrier_t;
-#define __DEFINED_pthread_barrier_t
-#endif
+#define __LITTLE_ENDIAN 1234
+#define __BIG_ENDIAN 4321
+#define __USE_TIME_BITS64 1
 
 #if defined(__NEED_size_t) && !defined(__DEFINED_size_t)
 typedef unsigned _Addr size_t;
@@ -135,6 +89,16 @@ typedef _Reg register_t;
 #define __DEFINED_register_t
 #endif
 
+#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
+typedef _Int64 time_t;
+#define __DEFINED_time_t
+#endif
+
+#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
+typedef _Int64 suseconds_t;
+#define __DEFINED_suseconds_t
+#endif
+
 
 #if defined(__NEED_int8_t) && !defined(__DEFINED_int8_t)
 typedef signed char     int8_t;
@@ -270,7 +234,7 @@ struct timeval { time_t tv_sec; suseconds_t tv_usec; };
 #endif
 
 #if defined(__NEED_struct_timespec) && !defined(__DEFINED_struct_timespec)
-struct timespec { time_t tv_sec; long tv_nsec; };
+struct timespec { time_t tv_sec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER==4321); long tv_nsec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER!=4321); };
 #define __DEFINED_struct_timespec
 #endif
 
@@ -366,6 +330,17 @@ typedef struct _IO_FILE FILE;
 #endif
 
 
+#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
+typedef __builtin_va_list va_list;
+#define __DEFINED_va_list
+#endif
+
+#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
+typedef __builtin_va_list __isoc_va_list;
+#define __DEFINED___isoc_va_list
+#endif
+
+
 #if defined(__NEED_mbstate_t) && !defined(__DEFINED_mbstate_t)
 typedef struct __mbstate_t { unsigned __opaque1, __opaque2; } mbstate_t;
 #define __DEFINED_mbstate_t
@@ -401,6 +376,42 @@ typedef unsigned short sa_family_t;
 #endif
 
 
+#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
+typedef struct { union { int __i[sizeof(long)==8?14:9]; volatile int __vi[sizeof(long)==8?14:9]; unsigned long __s[sizeof(long)==8?7:9]; } __u; } pthread_attr_t;
+#define __DEFINED_pthread_attr_t
+#endif
+
+#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } pthread_mutex_t;
+#define __DEFINED_pthread_mutex_t
+#endif
+
+#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } mtx_t;
+#define __DEFINED_mtx_t
+#endif
+
+#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } pthread_cond_t;
+#define __DEFINED_pthread_cond_t
+#endif
+
+#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } cnd_t;
+#define __DEFINED_cnd_t
+#endif
+
+#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
+typedef struct { union { int __i[sizeof(long)==8?14:8]; volatile int __vi[sizeof(long)==8?14:8]; void *__p[sizeof(long)==8?7:8]; } __u; } pthread_rwlock_t;
+#define __DEFINED_pthread_rwlock_t
+#endif
+
+#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
+typedef struct { union { int __i[sizeof(long)==8?8:5]; volatile int __vi[sizeof(long)==8?8:5]; void *__p[sizeof(long)==8?4:5]; } __u; } pthread_barrier_t;
+#define __DEFINED_pthread_barrier_t
+#endif
+
+
 #undef _Addr
 #undef _Int64
 #undef _Reg
\ No newline at end of file
diff --git a/lib/libc/include/aarch64-linux-musl/bits/endian.h b/lib/libc/include/aarch64-linux-musl/bits/endian.h
deleted file mode 100644
index 3ab24cc932..0000000000
--- a/lib/libc/include/aarch64-linux-musl/bits/endian.h
+++ /dev/null
@@ -1,5 +0,0 @@
-#if __AARCH64EB__
-#define __BYTE_ORDER __BIG_ENDIAN
-#else
-#define __BYTE_ORDER __LITTLE_ENDIAN
-#endif
\ No newline at end of file
diff --git a/lib/libc/include/aarch64-linux-musl/bits/socket.h b/lib/libc/include/aarch64-linux-musl/bits/socket.h
deleted file mode 100644
index b4e9fb6a1c..0000000000
--- a/lib/libc/include/aarch64-linux-musl/bits/socket.h
+++ /dev/null
@@ -1,33 +0,0 @@
-#include <endian.h>
-
-struct msghdr {
-	void *msg_name;
-	socklen_t msg_namelen;
-	struct iovec *msg_iov;
-#if __BYTE_ORDER == __BIG_ENDIAN
-	int __pad1, msg_iovlen;
-#else
-	int msg_iovlen, __pad1;
-#endif
-	void *msg_control;
-#if __BYTE_ORDER == __BIG_ENDIAN
-	int __pad2;
-	socklen_t msg_controllen;
-#else
-	socklen_t msg_controllen;
-	int __pad2;
-#endif
-	int msg_flags;
-};
-
-struct cmsghdr {
-#if __BYTE_ORDER == __BIG_ENDIAN
-	int __pad1;
-	socklen_t cmsg_len;
-#else
-	socklen_t cmsg_len;
-	int __pad1;
-#endif
-	int cmsg_level;
-	int cmsg_type;
-};
\ No newline at end of file
diff --git a/lib/libc/include/aarch64-linux-musl/bits/syscall.h b/lib/libc/include/aarch64-linux-musl/bits/syscall.h
index 53f296e037..72392b874f 100644
--- a/lib/libc/include/aarch64-linux-musl/bits/syscall.h
+++ b/lib/libc/include/aarch64-linux-musl/bits/syscall.h
@@ -287,6 +287,8 @@
 #define __NR_fsconfig		431
 #define __NR_fsmount		432
 #define __NR_fspick		433
+#define __NR_pidfd_open		434
+#define __NR_clone3		435
 
 #define SYS_io_setup 0
 #define SYS_io_destroy 1
@@ -576,4 +578,6 @@
 #define SYS_fsopen		430
 #define SYS_fsconfig		431
 #define SYS_fsmount		432
-#define SYS_fspick		433
\ No newline at end of file
+#define SYS_fspick		433
+#define SYS_pidfd_open		434
+#define SYS_clone3		435
\ No newline at end of file
diff --git a/lib/libc/include/arm-linux-musl/bits/alltypes.h b/lib/libc/include/arm-linux-musl/bits/alltypes.h
index d1ad5774d5..a99e771958 100644
--- a/lib/libc/include/arm-linux-musl/bits/alltypes.h
+++ b/lib/libc/include/arm-linux-musl/bits/alltypes.h
@@ -1,17 +1,15 @@
+#define _REDIR_TIME64 1
 #define _Addr int
 #define _Int64 long long
 #define _Reg int
 
-#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
-typedef __builtin_va_list va_list;
-#define __DEFINED_va_list
-#endif
-
-#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
-typedef __builtin_va_list __isoc_va_list;
-#define __DEFINED___isoc_va_list
+#if __ARMEB__
+#define __BYTE_ORDER 4321
+#else
+#define __BYTE_ORDER 1234
 #endif
 
+#define __LONG_MAX 0x7fffffffL
 
 #ifndef __cplusplus
 #if defined(__NEED_wchar_t) && !defined(__DEFINED_wchar_t)
@@ -37,52 +35,9 @@ typedef struct { long long __ll; long double __ld; } max_align_t;
 #define __DEFINED_max_align_t
 #endif
 
-
-#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
-typedef long time_t;
-#define __DEFINED_time_t
-#endif
-
-#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
-typedef long suseconds_t;
-#define __DEFINED_suseconds_t
-#endif
-
-
-#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
-typedef struct { union { int __i[9]; volatile int __vi[9]; unsigned __s[9]; } __u; } pthread_attr_t;
-#define __DEFINED_pthread_attr_t
-#endif
-
-#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
-typedef struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } pthread_mutex_t;
-#define __DEFINED_pthread_mutex_t
-#endif
-
-#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
-typedef struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } mtx_t;
-#define __DEFINED_mtx_t
-#endif
-
-#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } pthread_cond_t;
-#define __DEFINED_pthread_cond_t
-#endif
-
-#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } cnd_t;
-#define __DEFINED_cnd_t
-#endif
-
-#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
-typedef struct { union { int __i[8]; volatile int __vi[8]; void *__p[8]; } __u; } pthread_rwlock_t;
-#define __DEFINED_pthread_rwlock_t
-#endif
-
-#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
-typedef struct { union { int __i[5]; volatile int __vi[5]; void *__p[5]; } __u; } pthread_barrier_t;
-#define __DEFINED_pthread_barrier_t
-#endif
+#define __LITTLE_ENDIAN 1234
+#define __BIG_ENDIAN 4321
+#define __USE_TIME_BITS64 1
 
 #if defined(__NEED_size_t) && !defined(__DEFINED_size_t)
 typedef unsigned _Addr size_t;
@@ -119,6 +74,16 @@ typedef _Reg register_t;
 #define __DEFINED_register_t
 #endif
 
+#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
+typedef _Int64 time_t;
+#define __DEFINED_time_t
+#endif
+
+#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
+typedef _Int64 suseconds_t;
+#define __DEFINED_suseconds_t
+#endif
+
 
 #if defined(__NEED_int8_t) && !defined(__DEFINED_int8_t)
 typedef signed char     int8_t;
@@ -254,7 +219,7 @@ struct timeval { time_t tv_sec; suseconds_t tv_usec; };
 #endif
 
 #if defined(__NEED_struct_timespec) && !defined(__DEFINED_struct_timespec)
-struct timespec { time_t tv_sec; long tv_nsec; };
+struct timespec { time_t tv_sec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER==4321); long tv_nsec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER!=4321); };
 #define __DEFINED_struct_timespec
 #endif
 
@@ -350,6 +315,17 @@ typedef struct _IO_FILE FILE;
 #endif
 
 
+#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
+typedef __builtin_va_list va_list;
+#define __DEFINED_va_list
+#endif
+
+#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
+typedef __builtin_va_list __isoc_va_list;
+#define __DEFINED___isoc_va_list
+#endif
+
+
 #if defined(__NEED_mbstate_t) && !defined(__DEFINED_mbstate_t)
 typedef struct __mbstate_t { unsigned __opaque1, __opaque2; } mbstate_t;
 #define __DEFINED_mbstate_t
@@ -385,6 +361,42 @@ typedef unsigned short sa_family_t;
 #endif
 
 
+#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
+typedef struct { union { int __i[sizeof(long)==8?14:9]; volatile int __vi[sizeof(long)==8?14:9]; unsigned long __s[sizeof(long)==8?7:9]; } __u; } pthread_attr_t;
+#define __DEFINED_pthread_attr_t
+#endif
+
+#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } pthread_mutex_t;
+#define __DEFINED_pthread_mutex_t
+#endif
+
+#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } mtx_t;
+#define __DEFINED_mtx_t
+#endif
+
+#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } pthread_cond_t;
+#define __DEFINED_pthread_cond_t
+#endif
+
+#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } cnd_t;
+#define __DEFINED_cnd_t
+#endif
+
+#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
+typedef struct { union { int __i[sizeof(long)==8?14:8]; volatile int __vi[sizeof(long)==8?14:8]; void *__p[sizeof(long)==8?7:8]; } __u; } pthread_rwlock_t;
+#define __DEFINED_pthread_rwlock_t
+#endif
+
+#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
+typedef struct { union { int __i[sizeof(long)==8?8:5]; volatile int __vi[sizeof(long)==8?8:5]; void *__p[sizeof(long)==8?4:5]; } __u; } pthread_barrier_t;
+#define __DEFINED_pthread_barrier_t
+#endif
+
+
 #undef _Addr
 #undef _Int64
 #undef _Reg
\ No newline at end of file
diff --git a/lib/libc/include/arm-linux-musl/bits/endian.h b/lib/libc/include/arm-linux-musl/bits/endian.h
deleted file mode 100644
index e4d86deb11..0000000000
--- a/lib/libc/include/arm-linux-musl/bits/endian.h
+++ /dev/null
@@ -1,5 +0,0 @@
-#if __ARMEB__
-#define __BYTE_ORDER __BIG_ENDIAN
-#else
-#define __BYTE_ORDER __LITTLE_ENDIAN
-#endif
\ No newline at end of file
diff --git a/lib/libc/include/arm-linux-musl/bits/ipcstat.h b/lib/libc/include/arm-linux-musl/bits/ipcstat.h
new file mode 100644
index 0000000000..d055f3e837
--- /dev/null
+++ b/lib/libc/include/arm-linux-musl/bits/ipcstat.h
@@ -0,0 +1 @@
+#define IPC_STAT 0x102
\ No newline at end of file
diff --git a/lib/libc/include/arm-linux-musl/bits/limits.h b/lib/libc/include/arm-linux-musl/bits/limits.h
deleted file mode 100644
index ba9c3aa003..0000000000
--- a/lib/libc/include/arm-linux-musl/bits/limits.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-#define LONG_BIT 32
-#endif
-
-#define LONG_MAX  0x7fffffffL
-#define LLONG_MAX  0x7fffffffffffffffLL
\ No newline at end of file
diff --git a/lib/libc/include/arm-linux-musl/bits/msg.h b/lib/libc/include/arm-linux-musl/bits/msg.h
index e5c8ba7520..037fd956d4 100644
--- a/lib/libc/include/arm-linux-musl/bits/msg.h
+++ b/lib/libc/include/arm-linux-musl/bits/msg.h
@@ -1,15 +1,18 @@
 struct msqid_ds {
 	struct ipc_perm msg_perm;
-	time_t msg_stime;
-	int __unused1;
-	time_t msg_rtime;
-	int __unused2;
-	time_t msg_ctime;
-	int __unused3;
+	unsigned long __msg_stime_lo;
+	unsigned long __msg_stime_hi;
+	unsigned long __msg_rtime_lo;
+	unsigned long __msg_rtime_hi;
+	unsigned long __msg_ctime_lo;
+	unsigned long __msg_ctime_hi;
 	unsigned long msg_cbytes;
 	msgqnum_t msg_qnum;
 	msglen_t msg_qbytes;
 	pid_t msg_lspid;
 	pid_t msg_lrpid;
 	unsigned long __unused[2];
+	time_t msg_stime;
+	time_t msg_rtime;
+	time_t msg_ctime;
 };
\ No newline at end of file
diff --git a/lib/libc/include/arm-linux-musl/bits/sem.h b/lib/libc/include/arm-linux-musl/bits/sem.h
index 9097f9ffdb..eaa885a8b5 100644
--- a/lib/libc/include/arm-linux-musl/bits/sem.h
+++ b/lib/libc/include/arm-linux-musl/bits/sem.h
@@ -1,9 +1,9 @@
 struct semid_ds {
 	struct ipc_perm sem_perm;
-	time_t sem_otime;
-	long __unused1;
-	time_t sem_ctime;
-	long __unused2;
+	unsigned long __sem_otime_lo;
+	unsigned long __sem_otime_hi;
+	unsigned long __sem_ctime_lo;
+	unsigned long __sem_ctime_hi;
 #if __BYTE_ORDER == __LITTLE_ENDIAN
 	unsigned short sem_nsems;
 	char __sem_nsems_pad[sizeof(long)-sizeof(short)];
@@ -13,4 +13,6 @@ struct semid_ds {
 #endif
 	long __unused3;
 	long __unused4;
+	time_t sem_otime;
+	time_t sem_ctime;
 };
\ No newline at end of file
diff --git a/lib/libc/include/arm-linux-musl/bits/shm.h b/lib/libc/include/arm-linux-musl/bits/shm.h
index aa5587127a..1ecb03ca0e 100644
--- a/lib/libc/include/arm-linux-musl/bits/shm.h
+++ b/lib/libc/include/arm-linux-musl/bits/shm.h
@@ -3,17 +3,21 @@
 struct shmid_ds {
 	struct ipc_perm shm_perm;
 	size_t shm_segsz;
-	time_t shm_atime;
-	int __unused1;
-	time_t shm_dtime;
-	int __unused2;
-	time_t shm_ctime;
-	int __unused3;
+	unsigned long __shm_atime_lo;
+	unsigned long __shm_atime_hi;
+	unsigned long __shm_dtime_lo;
+	unsigned long __shm_dtime_hi;
+	unsigned long __shm_ctime_lo;
+	unsigned long __shm_ctime_hi;
 	pid_t shm_cpid;
 	pid_t shm_lpid;
 	unsigned long shm_nattch;
 	unsigned long __pad1;
 	unsigned long __pad2;
+	unsigned long __pad3;
+	time_t shm_atime;
+	time_t shm_dtime;
+	time_t shm_ctime;
 };
 
 struct shminfo {
diff --git a/lib/libc/include/arm-linux-musl/bits/stat.h b/lib/libc/include/arm-linux-musl/bits/stat.h
index 78e91b4028..3bf02b3756 100644
--- a/lib/libc/include/arm-linux-musl/bits/stat.h
+++ b/lib/libc/include/arm-linux-musl/bits/stat.h
@@ -14,8 +14,12 @@ struct stat {
 	off_t st_size;
 	blksize_t st_blksize;
 	blkcnt_t st_blocks;
+	struct {
+		long tv_sec;
+		long tv_nsec;
+	} __st_atim32, __st_mtim32, __st_ctim32;
+	ino_t st_ino;
 	struct timespec st_atim;
 	struct timespec st_mtim;
 	struct timespec st_ctim;
-	ino_t st_ino;
 };
\ No newline at end of file
diff --git a/lib/libc/include/arm-linux-musl/bits/syscall.h b/lib/libc/include/arm-linux-musl/bits/syscall.h
index 778430b874..5429a867e3 100644
--- a/lib/libc/include/arm-linux-musl/bits/syscall.h
+++ b/lib/libc/include/arm-linux-musl/bits/syscall.h
@@ -55,8 +55,8 @@
 #define __NR_sethostname	74
 #define __NR_setrlimit	75
 #define __NR_getrusage	77
-#define __NR_gettimeofday	78
-#define __NR_settimeofday	79
+#define __NR_gettimeofday_time32	78
+#define __NR_settimeofday_time32	79
 #define __NR_getgroups	80
 #define __NR_setgroups	81
 #define __NR_symlink	83
@@ -211,14 +211,14 @@
 #define __NR_remap_file_pages	253
 #define __NR_set_tid_address	256
 #define __NR_timer_create	257
-#define __NR_timer_settime	258
-#define __NR_timer_gettime	259
+#define __NR_timer_settime32	258
+#define __NR_timer_gettime32	259
 #define __NR_timer_getoverrun	260
 #define __NR_timer_delete	261
-#define __NR_clock_settime	262
-#define __NR_clock_gettime	263
-#define __NR_clock_getres	264
-#define __NR_clock_nanosleep	265
+#define __NR_clock_settime32	262
+#define __NR_clock_gettime32	263
+#define __NR_clock_getres_time32	264
+#define __NR_clock_nanosleep_time32	265
 #define __NR_statfs64	266
 #define __NR_fstatfs64	267
 #define __NR_tgkill	268
@@ -308,8 +308,8 @@
 #define __NR_timerfd_create	350
 #define __NR_eventfd	351
 #define __NR_fallocate	352
-#define __NR_timerfd_settime	353
-#define __NR_timerfd_gettime	354
+#define __NR_timerfd_settime32	353
+#define __NR_timerfd_gettime32	354
 #define __NR_signalfd4	355
 #define __NR_eventfd2	356
 #define __NR_epoll_create1	357
@@ -387,6 +387,8 @@
 #define __NR_fsconfig		431
 #define __NR_fsmount		432
 #define __NR_fspick		433
+#define __NR_pidfd_open		434
+#define __NR_clone3		435
 
 #define __ARM_NR_breakpoint	0x0f0001
 #define __ARM_NR_cacheflush	0x0f0002
@@ -452,8 +454,8 @@
 #define SYS_sethostname	74
 #define SYS_setrlimit	75
 #define SYS_getrusage	77
-#define SYS_gettimeofday	78
-#define SYS_settimeofday	79
+#define SYS_gettimeofday_time32	78
+#define SYS_settimeofday_time32	79
 #define SYS_getgroups	80
 #define SYS_setgroups	81
 #define SYS_symlink	83
@@ -608,14 +610,14 @@
 #define SYS_remap_file_pages	253
 #define SYS_set_tid_address	256
 #define SYS_timer_create	257
-#define SYS_timer_settime	258
-#define SYS_timer_gettime	259
+#define SYS_timer_settime32	258
+#define SYS_timer_gettime32	259
 #define SYS_timer_getoverrun	260
 #define SYS_timer_delete	261
-#define SYS_clock_settime	262
-#define SYS_clock_gettime	263
-#define SYS_clock_getres	264
-#define SYS_clock_nanosleep	265
+#define SYS_clock_settime32	262
+#define SYS_clock_gettime32	263
+#define SYS_clock_getres_time32	264
+#define SYS_clock_nanosleep_time32	265
 #define SYS_statfs64	266
 #define SYS_fstatfs64	267
 #define SYS_tgkill	268
@@ -705,8 +707,8 @@
 #define SYS_timerfd_create	350
 #define SYS_eventfd	351
 #define SYS_fallocate	352
-#define SYS_timerfd_settime	353
-#define SYS_timerfd_gettime	354
+#define SYS_timerfd_settime32	353
+#define SYS_timerfd_gettime32	354
 #define SYS_signalfd4	355
 #define SYS_eventfd2	356
 #define SYS_epoll_create1	357
@@ -783,4 +785,6 @@
 #define SYS_fsopen		430
 #define SYS_fsconfig		431
 #define SYS_fsmount		432
-#define SYS_fspick		433
\ No newline at end of file
+#define SYS_fspick		433
+#define SYS_pidfd_open		434
+#define SYS_clone3		435
\ No newline at end of file
diff --git a/lib/libc/include/generic-musl/aio.h b/lib/libc/include/generic-musl/aio.h
index 0830b10c2c..4588ff2e39 100644
--- a/lib/libc/include/generic-musl/aio.h
+++ b/lib/libc/include/generic-musl/aio.h
@@ -62,6 +62,10 @@ int lio_listio(int, struct aiocb *__restrict const *__restrict, int, struct sige
 #define off64_t off_t
 #endif
 
+#if _REDIR_TIME64
+__REDIR(aio_suspend, __aio_suspend_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/alloca.h b/lib/libc/include/generic-musl/alloca.h
index 53dd20479d..28390cee6b 100644
--- a/lib/libc/include/generic-musl/alloca.h
+++ b/lib/libc/include/generic-musl/alloca.h
@@ -10,9 +10,7 @@ extern "C" {
 
 void *alloca(size_t);
 
-#ifdef __GNUC__
 #define alloca __builtin_alloca
-#endif
 
 #ifdef __cplusplus
 }
diff --git a/lib/libc/include/generic-musl/arpa/nameser.h b/lib/libc/include/generic-musl/arpa/nameser.h
index bd411459eb..10db66745e 100644
--- a/lib/libc/include/generic-musl/arpa/nameser.h
+++ b/lib/libc/include/generic-musl/arpa/nameser.h
@@ -7,7 +7,6 @@ extern "C" {
 
 #include <stddef.h>
 #include <stdint.h>
-#include <endian.h>
 
 #define __NAMESER	19991006
 #define NS_PACKETSZ	512
diff --git a/lib/libc/include/generic-musl/bits/dirent.h b/lib/libc/include/generic-musl/bits/dirent.h
new file mode 100644
index 0000000000..16f37f6982
--- /dev/null
+++ b/lib/libc/include/generic-musl/bits/dirent.h
@@ -0,0 +1,11 @@
+#define _DIRENT_HAVE_D_RECLEN
+#define _DIRENT_HAVE_D_OFF
+#define _DIRENT_HAVE_D_TYPE
+
+struct dirent {
+	ino_t d_ino;
+	off_t d_off;
+	unsigned short d_reclen;
+	unsigned char d_type;
+	char d_name[256];
+};
\ No newline at end of file
diff --git a/lib/libc/include/generic-musl/bits/endian.h b/lib/libc/include/generic-musl/bits/endian.h
deleted file mode 100644
index b1a7affbbb..0000000000
--- a/lib/libc/include/generic-musl/bits/endian.h
+++ /dev/null
@@ -1 +0,0 @@
-#define __BYTE_ORDER __LITTLE_ENDIAN
\ No newline at end of file
diff --git a/lib/libc/include/generic-musl/bits/ioctl.h b/lib/libc/include/generic-musl/bits/ioctl.h
index 3af94ce07a..1f814548d3 100644
--- a/lib/libc/include/generic-musl/bits/ioctl.h
+++ b/lib/libc/include/generic-musl/bits/ioctl.h
@@ -104,7 +104,12 @@
 #define FIOGETOWN       0x8903
 #define SIOCGPGRP       0x8904
 #define SIOCATMARK      0x8905
+#if __LONG_MAX == 0x7fffffff
+#define SIOCGSTAMP      _IOR(0x89, 6, char[16])
+#define SIOCGSTAMPNS    _IOR(0x89, 7, char[16])
+#else
 #define SIOCGSTAMP      0x8906
 #define SIOCGSTAMPNS    0x8907
+#endif
 
 #include <bits/ioctl_fix.h>
\ No newline at end of file
diff --git a/lib/libc/include/generic-musl/bits/limits.h b/lib/libc/include/generic-musl/bits/limits.h
index 1be0deba7a..e69de29bb2 100644
--- a/lib/libc/include/generic-musl/bits/limits.h
+++ b/lib/libc/include/generic-musl/bits/limits.h
@@ -1,7 +0,0 @@
-#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-#define LONG_BIT 64
-#endif
-
-#define LONG_MAX  0x7fffffffffffffffL
-#define LLONG_MAX  0x7fffffffffffffffLL
\ No newline at end of file
diff --git a/lib/libc/include/generic-musl/bits/socket.h b/lib/libc/include/generic-musl/bits/socket.h
index 34aba4d2a2..e69de29bb2 100644
--- a/lib/libc/include/generic-musl/bits/socket.h
+++ b/lib/libc/include/generic-musl/bits/socket.h
@@ -1,15 +0,0 @@
-struct msghdr {
-	void *msg_name;
-	socklen_t msg_namelen;
-	struct iovec *msg_iov;
-	int msg_iovlen;
-	void *msg_control;
-	socklen_t msg_controllen;
-	int msg_flags;
-};
-
-struct cmsghdr {
-	socklen_t cmsg_len;
-	int cmsg_level;
-	int cmsg_type;
-};
\ No newline at end of file
diff --git a/lib/libc/include/generic-musl/dirent.h b/lib/libc/include/generic-musl/dirent.h
index 2be943aa18..665c411a6f 100644
--- a/lib/libc/include/generic-musl/dirent.h
+++ b/lib/libc/include/generic-musl/dirent.h
@@ -15,20 +15,10 @@ extern "C" {
 
 #include <bits/alltypes.h>
 
+#include <bits/dirent.h>
+
 typedef struct __dirstream DIR;
 
-#define _DIRENT_HAVE_D_RECLEN
-#define _DIRENT_HAVE_D_OFF
-#define _DIRENT_HAVE_D_TYPE
-
-struct dirent {
-	ino_t d_ino;
-	off_t d_off;
-	unsigned short d_reclen;
-	unsigned char d_type;
-	char d_name[256];
-};
-
 #define d_fileno d_ino
 
 int            closedir(DIR *);
diff --git a/lib/libc/include/generic-musl/dlfcn.h b/lib/libc/include/generic-musl/dlfcn.h
index 871f385859..c38b56c470 100644
--- a/lib/libc/include/generic-musl/dlfcn.h
+++ b/lib/libc/include/generic-musl/dlfcn.h
@@ -35,6 +35,10 @@ int dladdr(const void *, Dl_info *);
 int dlinfo(void *, int, void *);
 #endif
 
+#if _REDIR_TIME64
+__REDIR(dlsym, __dlsym_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/endian.h b/lib/libc/include/generic-musl/endian.h
index 35198b06a5..12b8d30384 100644
--- a/lib/libc/include/generic-musl/endian.h
+++ b/lib/libc/include/generic-musl/endian.h
@@ -3,25 +3,19 @@
 
 #include <features.h>
 
-#define __LITTLE_ENDIAN 1234
-#define __BIG_ENDIAN 4321
+#define __NEED_uint16_t
+#define __NEED_uint32_t
+#define __NEED_uint64_t
+
+#include <bits/alltypes.h>
+
 #define __PDP_ENDIAN 3412
 
-#if defined(__GNUC__) && defined(__BYTE_ORDER__)
-#define __BYTE_ORDER __BYTE_ORDER__
-#else
-#include <bits/endian.h>
-#endif
-
-#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-
 #define BIG_ENDIAN __BIG_ENDIAN
 #define LITTLE_ENDIAN __LITTLE_ENDIAN
 #define PDP_ENDIAN __PDP_ENDIAN
 #define BYTE_ORDER __BYTE_ORDER
 
-#include <stdint.h>
-
 static __inline uint16_t __bswap16(uint16_t __x)
 {
 	return __x<<8 | __x>>8;
@@ -40,43 +34,47 @@ static __inline uint64_t __bswap64(uint64_t __x)
 #if __BYTE_ORDER == __LITTLE_ENDIAN
 #define htobe16(x) __bswap16(x)
 #define be16toh(x) __bswap16(x)
-#define betoh16(x) __bswap16(x)
 #define htobe32(x) __bswap32(x)
 #define be32toh(x) __bswap32(x)
-#define betoh32(x) __bswap32(x)
 #define htobe64(x) __bswap64(x)
 #define be64toh(x) __bswap64(x)
-#define betoh64(x) __bswap64(x)
 #define htole16(x) (uint16_t)(x)
 #define le16toh(x) (uint16_t)(x)
-#define letoh16(x) (uint16_t)(x)
 #define htole32(x) (uint32_t)(x)
 #define le32toh(x) (uint32_t)(x)
-#define letoh32(x) (uint32_t)(x)
 #define htole64(x) (uint64_t)(x)
 #define le64toh(x) (uint64_t)(x)
-#define letoh64(x) (uint64_t)(x)
 #else
 #define htobe16(x) (uint16_t)(x)
 #define be16toh(x) (uint16_t)(x)
-#define betoh16(x) (uint16_t)(x)
 #define htobe32(x) (uint32_t)(x)
 #define be32toh(x) (uint32_t)(x)
-#define betoh32(x) (uint32_t)(x)
 #define htobe64(x) (uint64_t)(x)
 #define be64toh(x) (uint64_t)(x)
-#define betoh64(x) (uint64_t)(x)
 #define htole16(x) __bswap16(x)
 #define le16toh(x) __bswap16(x)
-#define letoh16(x) __bswap16(x)
 #define htole32(x) __bswap32(x)
 #define le32toh(x) __bswap32(x)
-#define letoh32(x) __bswap32(x)
 #define htole64(x) __bswap64(x)
 #define le64toh(x) __bswap64(x)
-#define letoh64(x) __bswap64(x)
 #endif
 
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define betoh16(x) __bswap16(x)
+#define betoh32(x) __bswap32(x)
+#define betoh64(x) __bswap64(x)
+#define letoh16(x) (uint16_t)(x)
+#define letoh32(x) (uint32_t)(x)
+#define letoh64(x) (uint64_t)(x)
+#else
+#define betoh16(x) (uint16_t)(x)
+#define betoh32(x) (uint32_t)(x)
+#define betoh64(x) (uint64_t)(x)
+#define letoh16(x) __bswap16(x)
+#define letoh32(x) __bswap32(x)
+#define letoh64(x) __bswap64(x)
+#endif
 #endif
 
 #endif
\ No newline at end of file
diff --git a/lib/libc/include/generic-musl/features.h b/lib/libc/include/generic-musl/features.h
index f649c1773b..6b8e6aa25a 100644
--- a/lib/libc/include/generic-musl/features.h
+++ b/lib/libc/include/generic-musl/features.h
@@ -35,4 +35,6 @@
 #define _Noreturn
 #endif
 
+#define __REDIR(x,y) __typeof__(x) x __asm__(#y)
+
 #endif
\ No newline at end of file
diff --git a/lib/libc/include/generic-musl/limits.h b/lib/libc/include/generic-musl/limits.h
index 38ad59e601..78db5b776b 100644
--- a/lib/libc/include/generic-musl/limits.h
+++ b/lib/libc/include/generic-musl/limits.h
@@ -3,9 +3,7 @@
 
 #include <features.h>
 
-/* Most limits are system-specific */
-
-#include <bits/limits.h>
+#include <bits/alltypes.h> /* __LONG_MAX */
 
 /* Support signed or unsigned plain-char */
 
@@ -17,8 +15,6 @@
 #define CHAR_MAX 127
 #endif
 
-/* Some universal constants... */
-
 #define CHAR_BIT 8
 #define SCHAR_MIN (-128)
 #define SCHAR_MAX 127
@@ -30,8 +26,10 @@
 #define INT_MAX  0x7fffffff
 #define UINT_MAX 0xffffffffU
 #define LONG_MIN (-LONG_MAX-1)
+#define LONG_MAX __LONG_MAX
 #define ULONG_MAX (2UL*LONG_MAX+1)
 #define LLONG_MIN (-LLONG_MAX-1)
+#define LLONG_MAX  0x7fffffffffffffffLL
 #define ULLONG_MAX (2ULL*LLONG_MAX+1)
 
 #define MB_LEN_MAX 4
@@ -39,9 +37,13 @@
 #if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
  || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
 
+#include <bits/limits.h>
+
 #define PIPE_BUF 4096
 #define FILESIZEBITS 64
+#ifndef NAME_MAX
 #define NAME_MAX 255
+#endif
 #define PATH_MAX 4096
 #define NGROUPS_MAX 32
 #define ARG_MAX 131072
@@ -53,6 +55,12 @@
 #define TTY_NAME_MAX 32
 #define HOST_NAME_MAX 255
 
+#if LONG_MAX == 0x7fffffffL
+#define LONG_BIT 32
+#else
+#define LONG_BIT 64
+#endif
+
 /* Implementation choices... */
 
 #define PTHREAD_KEYS_MAX 128
diff --git a/lib/libc/include/generic-musl/mqueue.h b/lib/libc/include/generic-musl/mqueue.h
index 917b80c2e3..1b0a1b16e3 100644
--- a/lib/libc/include/generic-musl/mqueue.h
+++ b/lib/libc/include/generic-musl/mqueue.h
@@ -30,6 +30,11 @@ ssize_t mq_timedreceive(mqd_t, char *__restrict, size_t, unsigned *__restrict, c
 int mq_timedsend(mqd_t, const char *, size_t, unsigned, const struct timespec *);
 int mq_unlink(const char *);
 
+#if _REDIR_TIME64
+__REDIR(mq_timedreceive, __mq_timedreceive_time64);
+__REDIR(mq_timedsend, __mq_timedsend_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/netinet/icmp6.h b/lib/libc/include/generic-musl/netinet/icmp6.h
index 6419a5a0a7..44a2d8b0f3 100644
--- a/lib/libc/include/generic-musl/netinet/icmp6.h
+++ b/lib/libc/include/generic-musl/netinet/icmp6.h
@@ -9,7 +9,6 @@ extern "C" {
 #include <string.h>
 #include <sys/types.h>
 #include <netinet/in.h>
-#include <endian.h>
 
 #define ICMP6_FILTER 1
 
diff --git a/lib/libc/include/generic-musl/netinet/if_ether.h b/lib/libc/include/generic-musl/netinet/if_ether.h
index 37d81698eb..8be01cd4ef 100644
--- a/lib/libc/include/generic-musl/netinet/if_ether.h
+++ b/lib/libc/include/generic-musl/netinet/if_ether.h
@@ -58,6 +58,7 @@
 #define ETH_P_ERSPAN	0x88BE
 #define ETH_P_PREAUTH	0x88C7
 #define ETH_P_TIPC	0x88CA
+#define ETH_P_LLDP	0x88CC
 #define ETH_P_MACSEC	0x88E5
 #define ETH_P_8021AH	0x88E7
 #define ETH_P_MVRP	0x88F5
diff --git a/lib/libc/include/generic-musl/netinet/ip.h b/lib/libc/include/generic-musl/netinet/ip.h
index 95baf6bdb1..4a8a746f8e 100644
--- a/lib/libc/include/generic-musl/netinet/ip.h
+++ b/lib/libc/include/generic-musl/netinet/ip.h
@@ -7,7 +7,6 @@ extern "C" {
 
 #include <stdint.h>
 #include <netinet/in.h>
-#include <endian.h>
 
 struct timestamp {
 	uint8_t len;
@@ -191,6 +190,8 @@ struct ip_timestamp {
 
 #define	IP_MSS		576
 
+#define __UAPI_DEF_IPHDR	0
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/netinet/ip6.h b/lib/libc/include/generic-musl/netinet/ip6.h
index cb1292a647..dfb237795f 100644
--- a/lib/libc/include/generic-musl/netinet/ip6.h
+++ b/lib/libc/include/generic-musl/netinet/ip6.h
@@ -7,7 +7,6 @@ extern "C" {
 
 #include <stdint.h>
 #include <netinet/in.h>
-#include <endian.h>
 
 struct ip6_hdr {
 	union {
diff --git a/lib/libc/include/generic-musl/netinet/tcp.h b/lib/libc/include/generic-musl/netinet/tcp.h
index 949f701493..f0bdb19232 100644
--- a/lib/libc/include/generic-musl/netinet/tcp.h
+++ b/lib/libc/include/generic-musl/netinet/tcp.h
@@ -38,6 +38,7 @@
 #define TCP_FASTOPEN_NO_COOKIE 34
 #define TCP_ZEROCOPY_RECEIVE   35
 #define TCP_INQ          36
+#define TCP_TX_DELAY     37
 
 #define TCP_CM_INQ TCP_INQ
 
@@ -97,7 +98,6 @@ enum {
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <stdint.h>
-#include <endian.h>
 
 typedef uint32_t tcp_seq;
 
@@ -234,6 +234,8 @@ struct tcp_info {
 	uint64_t tcpi_bytes_retrans;
 	uint32_t tcpi_dsack_dups;
 	uint32_t tcpi_reord_seen;
+	uint32_t tcpi_rcv_ooopack;
+	uint32_t tcpi_snd_wnd;
 };
 
 #define TCP_MD5SIG_MAXKEYLEN    80
diff --git a/lib/libc/include/generic-musl/poll.h b/lib/libc/include/generic-musl/poll.h
index be58c64174..45078b866d 100644
--- a/lib/libc/include/generic-musl/poll.h
+++ b/lib/libc/include/generic-musl/poll.h
@@ -44,6 +44,12 @@ int poll (struct pollfd *, nfds_t, int);
 int ppoll(struct pollfd *, nfds_t, const struct timespec *, const sigset_t *);
 #endif
 
+#if _REDIR_TIME64
+#ifdef _GNU_SOURCE
+__REDIR(ppoll, __ppoll_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/pthread.h b/lib/libc/include/generic-musl/pthread.h
index 6bfa3a5ace..e812c675c2 100644
--- a/lib/libc/include/generic-musl/pthread.h
+++ b/lib/libc/include/generic-musl/pthread.h
@@ -224,6 +224,16 @@ int pthread_tryjoin_np(pthread_t, void **);
 int pthread_timedjoin_np(pthread_t, void **, const struct timespec *);
 #endif
 
+#if _REDIR_TIME64
+__REDIR(pthread_mutex_timedlock, __pthread_mutex_timedlock_time64);
+__REDIR(pthread_cond_timedwait, __pthread_cond_timedwait_time64);
+__REDIR(pthread_rwlock_timedrdlock, __pthread_rwlock_timedrdlock_time64);
+__REDIR(pthread_rwlock_timedwrlock, __pthread_rwlock_timedwrlock_time64);
+#ifdef _GNU_SOURCE
+__REDIR(pthread_timedjoin_np, __pthread_timedjoin_np_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/sched.h b/lib/libc/include/generic-musl/sched.h
index 7963785f67..6225d25d53 100644
--- a/lib/libc/include/generic-musl/sched.h
+++ b/lib/libc/include/generic-musl/sched.h
@@ -19,10 +19,14 @@ extern "C" {
 struct sched_param {
 	int sched_priority;
 	int __reserved1;
+#if _REDIR_TIME64
+	long __reserved2[4];
+#else
 	struct {
 		time_t __reserved1;
 		long __reserved2;
 	} __reserved2[2];
+#endif
 	int __reserved3;
 };
 
@@ -133,6 +137,10 @@ __CPU_op_func_S(XOR, ^)
 
 #endif
 
+#if _REDIR_TIME64
+__REDIR(sched_rr_get_interval, __sched_rr_get_interval_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/semaphore.h b/lib/libc/include/generic-musl/semaphore.h
index 52f956ad23..8f26fb75f7 100644
--- a/lib/libc/include/generic-musl/semaphore.h
+++ b/lib/libc/include/generic-musl/semaphore.h
@@ -29,6 +29,10 @@ int    sem_trywait(sem_t *);
 int    sem_unlink(const char *);
 int    sem_wait(sem_t *);
 
+#if _REDIR_TIME64
+__REDIR(sem_timedwait, __sem_timedwait_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/signal.h b/lib/libc/include/generic-musl/signal.h
index 37ee858c48..99d473c50e 100644
--- a/lib/libc/include/generic-musl/signal.h
+++ b/lib/libc/include/generic-musl/signal.h
@@ -271,6 +271,14 @@ typedef int sig_atomic_t;
 void (*signal(int, void (*)(int)))(int);
 int raise(int);
 
+#if _REDIR_TIME64
+#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
+ || defined(_BSD_SOURCE)
+__REDIR(sigtimedwait, __sigtimedwait_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/sys/acct.h b/lib/libc/include/generic-musl/sys/acct.h
index 02e4c7887c..b4161dec6b 100644
--- a/lib/libc/include/generic-musl/sys/acct.h
+++ b/lib/libc/include/generic-musl/sys/acct.h
@@ -6,7 +6,6 @@ extern "C" {
 #endif
 
 #include <features.h>
-#include <endian.h>
 #include <time.h>
 #include <stdint.h>
 
diff --git a/lib/libc/include/generic-musl/sys/ioctl.h b/lib/libc/include/generic-musl/sys/ioctl.h
index 7d3a88079a..28c9b6e24f 100644
--- a/lib/libc/include/generic-musl/sys/ioctl.h
+++ b/lib/libc/include/generic-musl/sys/ioctl.h
@@ -4,6 +4,7 @@
 extern "C" {
 #endif
 
+#include <bits/alltypes.h>
 #include <bits/ioctl.h>
 
 #define N_TTY           0
diff --git a/lib/libc/include/generic-musl/sys/mman.h b/lib/libc/include/generic-musl/sys/mman.h
index 85c605b75f..9bfd0a1075 100644
--- a/lib/libc/include/generic-musl/sys/mman.h
+++ b/lib/libc/include/generic-musl/sys/mman.h
@@ -92,6 +92,8 @@ extern "C" {
 #define MADV_DODUMP      17
 #define MADV_WIPEONFORK  18
 #define MADV_KEEPONFORK  19
+#define MADV_COLD        20
+#define MADV_PAGEOUT     21
 #define MADV_HWPOISON    100
 #define MADV_SOFT_OFFLINE 101
 #endif
diff --git a/lib/libc/include/generic-musl/sys/prctl.h b/lib/libc/include/generic-musl/sys/prctl.h
index 4cc6567f93..c5f79d86d2 100644
--- a/lib/libc/include/generic-musl/sys/prctl.h
+++ b/lib/libc/include/generic-musl/sys/prctl.h
@@ -154,6 +154,10 @@ struct prctl_mm_map {
 #define PR_PAC_APDBKEY (1UL << 3)
 #define PR_PAC_APGAKEY (1UL << 4)
 
+#define PR_SET_TAGGED_ADDR_CTRL 55
+#define PR_GET_TAGGED_ADDR_CTRL 56
+#define PR_TAGGED_ADDR_ENABLE (1UL << 0)
+
 int prctl (int, ...);
 
 #ifdef __cplusplus
diff --git a/lib/libc/include/generic-musl/sys/procfs.h b/lib/libc/include/generic-musl/sys/procfs.h
index 6c255d3a8b..03db62abfa 100644
--- a/lib/libc/include/generic-musl/sys/procfs.h
+++ b/lib/libc/include/generic-musl/sys/procfs.h
@@ -23,10 +23,9 @@ struct elf_prstatus {
 	pid_t pr_ppid;
 	pid_t pr_pgrp;
 	pid_t pr_sid;
-	struct timeval pr_utime;
-	struct timeval pr_stime;
-	struct timeval pr_cutime;
-	struct timeval pr_cstime;
+	struct {
+		long tv_sec, tv_usec;
+	} pr_utime, pr_stime, pr_cutime, pr_cstime;
 	elf_gregset_t pr_reg;
 	int pr_fpvalid;
 };
diff --git a/lib/libc/include/generic-musl/sys/ptrace.h b/lib/libc/include/generic-musl/sys/ptrace.h
index a37ef97bcf..1f0c6890fe 100644
--- a/lib/libc/include/generic-musl/sys/ptrace.h
+++ b/lib/libc/include/generic-musl/sys/ptrace.h
@@ -41,6 +41,7 @@ extern "C" {
 #define PTRACE_SETSIGMASK 0x420b
 #define PTRACE_SECCOMP_GET_FILTER 0x420c
 #define PTRACE_SECCOMP_GET_METADATA 0x420d
+#define PTRACE_GET_SYSCALL_INFO 0x420e
 
 #define PT_READ_I PTRACE_PEEKTEXT
 #define PT_READ_D PTRACE_PEEKDATA
@@ -88,6 +89,11 @@ extern "C" {
 
 #define PTRACE_PEEKSIGINFO_SHARED 1
 
+#define PTRACE_SYSCALL_INFO_NONE 0
+#define PTRACE_SYSCALL_INFO_ENTRY 1
+#define PTRACE_SYSCALL_INFO_EXIT 2
+#define PTRACE_SYSCALL_INFO_SECCOMP 3
+
 #include <bits/ptrace.h>
 
 struct __ptrace_peeksiginfo_args {
@@ -101,6 +107,29 @@ struct __ptrace_seccomp_metadata {
 	uint64_t flags;
 };
 
+struct __ptrace_syscall_info {
+	uint8_t op;
+	uint8_t __pad[3];
+	uint32_t arch;
+	uint64_t instruction_pointer;
+	uint64_t stack_pointer;
+	union {
+		struct {
+			uint64_t nr;
+			uint64_t args[6];
+		} entry;
+		struct {
+			int64_t rval;
+			uint8_t is_error;
+		} exit;
+		struct {
+			uint64_t nr;
+			uint64_t args[6];
+			uint32_t ret_data;
+		} seccomp;
+	};
+};
+
 long ptrace(int, ...);
 
 #ifdef __cplusplus
diff --git a/lib/libc/include/generic-musl/sys/resource.h b/lib/libc/include/generic-musl/sys/resource.h
index 90def956e6..8ef18ec050 100644
--- a/lib/libc/include/generic-musl/sys/resource.h
+++ b/lib/libc/include/generic-musl/sys/resource.h
@@ -90,7 +90,8 @@ int prlimit(pid_t, int, const struct rlimit *, struct rlimit *);
 #define RLIMIT_MSGQUEUE 12
 #define RLIMIT_NICE    13
 #define RLIMIT_RTPRIO  14
-#define RLIMIT_NLIMITS 15
+#define RLIMIT_RTTIME  15
+#define RLIMIT_NLIMITS 16
 
 #define RLIM_NLIMITS RLIMIT_NLIMITS
 
@@ -104,6 +105,10 @@ int prlimit(pid_t, int, const struct rlimit *, struct rlimit *);
 #define rlim64_t rlim_t
 #endif
 
+#if _REDIR_TIME64
+__REDIR(getrusage, __getrusage_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/sys/select.h b/lib/libc/include/generic-musl/sys/select.h
index 1a54ab5880..8ebe0c8b08 100644
--- a/lib/libc/include/generic-musl/sys/select.h
+++ b/lib/libc/include/generic-musl/sys/select.h
@@ -35,6 +35,11 @@ int pselect (int, fd_set *__restrict, fd_set *__restrict, fd_set *__restrict, co
 #define NFDBITS (8*(int)sizeof(long))
 #endif
 
+#if _REDIR_TIME64
+__REDIR(select, __select_time64);
+__REDIR(pselect, __pselect_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/sys/sem.h b/lib/libc/include/generic-musl/sys/sem.h
index 95e5d9433c..41362fab28 100644
--- a/lib/libc/include/generic-musl/sys/sem.h
+++ b/lib/libc/include/generic-musl/sys/sem.h
@@ -25,8 +25,6 @@ extern "C" {
 #define SETVAL		16
 #define SETALL		17
 
-#include <endian.h>
-
 #include <bits/sem.h>
 
 #define _SEM_SEMUN_UNDEFINED 1
@@ -62,6 +60,12 @@ int semop(int, struct sembuf *, size_t);
 int semtimedop(int, struct sembuf *, size_t, const struct timespec *);
 #endif
 
+#if _REDIR_TIME64
+#ifdef _GNU_SOURCE
+__REDIR(semtimedop, __semtimedop_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/sys/socket.h b/lib/libc/include/generic-musl/sys/socket.h
index 2c82ee12b2..957d3da9f0 100644
--- a/lib/libc/include/generic-musl/sys/socket.h
+++ b/lib/libc/include/generic-musl/sys/socket.h
@@ -19,6 +19,40 @@ extern "C" {
 
 #include <bits/socket.h>
 
+struct msghdr {
+	void *msg_name;
+	socklen_t msg_namelen;
+	struct iovec *msg_iov;
+#if __LONG_MAX > 0x7fffffff && __BYTE_ORDER == __BIG_ENDIAN
+	int __pad1;
+#endif
+	int msg_iovlen;
+#if __LONG_MAX > 0x7fffffff && __BYTE_ORDER == __LITTLE_ENDIAN
+	int __pad1;
+#endif
+	void *msg_control;
+#if __LONG_MAX > 0x7fffffff && __BYTE_ORDER == __BIG_ENDIAN
+	int __pad2;
+#endif
+	socklen_t msg_controllen;
+#if __LONG_MAX > 0x7fffffff && __BYTE_ORDER == __LITTLE_ENDIAN
+	int __pad2;
+#endif
+	int msg_flags;
+};
+
+struct cmsghdr {
+#if __LONG_MAX > 0x7fffffff && __BYTE_ORDER == __BIG_ENDIAN
+	int __pad1;
+#endif
+	socklen_t cmsg_len;
+#if __LONG_MAX > 0x7fffffff && __BYTE_ORDER == __LITTLE_ENDIAN
+	int __pad1;
+#endif
+	int cmsg_level;
+	int cmsg_type;
+};
+
 #ifdef _GNU_SOURCE
 struct ucred {
 	pid_t pid;
@@ -182,8 +216,6 @@ struct linger {
 #define SO_PEERCRED     17
 #define SO_RCVLOWAT     18
 #define SO_SNDLOWAT     19
-#define SO_RCVTIMEO     20
-#define SO_SNDTIMEO     21
 #define SO_ACCEPTCONN   30
 #define SO_PEERSEC      31
 #define SO_SNDBUFFORCE  32
@@ -192,6 +224,28 @@ struct linger {
 #define SO_DOMAIN       39
 #endif
 
+#ifndef SO_RCVTIMEO
+#if __LONG_MAX == 0x7fffffff
+#define SO_RCVTIMEO     66
+#define SO_SNDTIMEO     67
+#else
+#define SO_RCVTIMEO     20
+#define SO_SNDTIMEO     21
+#endif
+#endif
+
+#ifndef SO_TIMESTAMP
+#if __LONG_MAX == 0x7fffffff
+#define SO_TIMESTAMP    63
+#define SO_TIMESTAMPNS  64
+#define SO_TIMESTAMPING 65
+#else
+#define SO_TIMESTAMP    29
+#define SO_TIMESTAMPNS  35
+#define SO_TIMESTAMPING 37
+#endif
+#endif
+
 #define SO_SECURITY_AUTHENTICATION              22
 #define SO_SECURITY_ENCRYPTION_TRANSPORT        23
 #define SO_SECURITY_ENCRYPTION_NETWORK          24
@@ -203,14 +257,10 @@ struct linger {
 #define SO_GET_FILTER           SO_ATTACH_FILTER
 
 #define SO_PEERNAME             28
-#define SO_TIMESTAMP            29
 #define SCM_TIMESTAMP           SO_TIMESTAMP
-
 #define SO_PASSSEC              34
-#define SO_TIMESTAMPNS          35
 #define SCM_TIMESTAMPNS         SO_TIMESTAMPNS
 #define SO_MARK                 36
-#define SO_TIMESTAMPING         37
 #define SCM_TIMESTAMPING        SO_TIMESTAMPING
 #define SO_RXQ_OVFL             40
 #define SO_WIFI_STATUS          41
@@ -238,6 +288,7 @@ struct linger {
 #define SO_TXTIME               61
 #define SCM_TXTIME              SO_TXTIME
 #define SO_BINDTOIFINDEX        62
+#define SO_DETACH_REUSEPORT_BPF 68
 
 #ifndef SOL_SOCKET
 #define SOL_SOCKET      1
@@ -350,6 +401,12 @@ int setsockopt (int, int, int, const void *, socklen_t);
 
 int sockatmark (int);
 
+#if _REDIR_TIME64
+#ifdef _GNU_SOURCE
+__REDIR(recvmmsg, __recvmmsg_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/sys/stat.h b/lib/libc/include/generic-musl/sys/stat.h
index 521b873afa..e8a3753445 100644
--- a/lib/libc/include/generic-musl/sys/stat.h
+++ b/lib/libc/include/generic-musl/sys/stat.h
@@ -110,6 +110,15 @@ int lchmod(const char *, mode_t);
 #define off64_t off_t
 #endif
 
+#if _REDIR_TIME64
+__REDIR(stat, __stat_time64);
+__REDIR(fstat, __fstat_time64);
+__REDIR(lstat, __lstat_time64);
+__REDIR(fstatat, __fstatat_time64);
+__REDIR(futimens, __futimens_time64);
+__REDIR(utimensat, __utimensat_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/sys/statvfs.h b/lib/libc/include/generic-musl/sys/statvfs.h
index b2fb003b32..0da838f1ef 100644
--- a/lib/libc/include/generic-musl/sys/statvfs.h
+++ b/lib/libc/include/generic-musl/sys/statvfs.h
@@ -11,8 +11,6 @@ extern "C" {
 #define __NEED_fsfilcnt_t
 #include <bits/alltypes.h>
 
-#include <endian.h>
-
 struct statvfs {
 	unsigned long f_bsize, f_frsize;
 	fsblkcnt_t f_blocks, f_bfree, f_bavail;
diff --git a/lib/libc/include/generic-musl/sys/time.h b/lib/libc/include/generic-musl/sys/time.h
index cb3022c778..301c098ab4 100644
--- a/lib/libc/include/generic-musl/sys/time.h
+++ b/lib/libc/include/generic-musl/sys/time.h
@@ -56,6 +56,20 @@ int adjtime (const struct timeval *, struct timeval *);
 	(void)0 )
 #endif
 
+#if _REDIR_TIME64
+__REDIR(gettimeofday, __gettimeofday_time64);
+__REDIR(getitimer, __getitimer_time64);
+__REDIR(setitimer, __setitimer_time64);
+__REDIR(utimes, __utimes_time64);
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+__REDIR(futimes, __futimes_time64);
+__REDIR(futimesat, __futimesat_time64);
+__REDIR(lutimes, __lutimes_time64);
+__REDIR(settimeofday, __settimeofday_time64);
+__REDIR(adjtime, __adjtime64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/sys/timeb.h b/lib/libc/include/generic-musl/sys/timeb.h
index acbde569f2..6da1226b16 100644
--- a/lib/libc/include/generic-musl/sys/timeb.h
+++ b/lib/libc/include/generic-musl/sys/timeb.h
@@ -4,6 +4,8 @@
 extern "C" {
 #endif
 
+#include <features.h>
+
 #define __NEED_time_t
 
 #include <bits/alltypes.h>
@@ -16,6 +18,10 @@ struct timeb {
 
 int ftime(struct timeb *);
 
+#if _REDIR_TIME64
+__REDIR(ftime, __ftime64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/sys/timerfd.h b/lib/libc/include/generic-musl/sys/timerfd.h
index 3bea27f45a..ff158861cf 100644
--- a/lib/libc/include/generic-musl/sys/timerfd.h
+++ b/lib/libc/include/generic-musl/sys/timerfd.h
@@ -20,6 +20,11 @@ int timerfd_create(int, int);
 int timerfd_settime(int, int, const struct itimerspec *, struct itimerspec *);
 int timerfd_gettime(int, struct itimerspec *);
 
+#if _REDIR_TIME64
+__REDIR(timerfd_settime, __timerfd_settime64);
+__REDIR(timerfd_gettime, __timerfd_gettime64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/sys/timex.h b/lib/libc/include/generic-musl/sys/timex.h
index fc42fc653b..cab33a954c 100644
--- a/lib/libc/include/generic-musl/sys/timex.h
+++ b/lib/libc/include/generic-musl/sys/timex.h
@@ -91,6 +91,11 @@ struct timex {
 int adjtimex(struct timex *);
 int clock_adjtime(clockid_t, struct timex *);
 
+#if _REDIR_TIME64
+__REDIR(adjtimex, __adjtimex_time64);
+__REDIR(clock_adjtime, __clock_adjtime64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/sys/ttydefaults.h b/lib/libc/include/generic-musl/sys/ttydefaults.h
index 2324873319..602a4af79a 100644
--- a/lib/libc/include/generic-musl/sys/ttydefaults.h
+++ b/lib/libc/include/generic-musl/sys/ttydefaults.h
@@ -6,16 +6,11 @@
 #define TTYDEF_LFLAG (ECHO | ICANON | ISIG | IEXTEN | ECHOE|ECHOKE|ECHOCTL)
 #define TTYDEF_CFLAG (CREAD | CS7 | PARENB | HUPCL)
 #define TTYDEF_SPEED (B9600)
-#define CTRL(x) (x&037)
+#define CTRL(x) ((x)&037)
 #define CEOF CTRL('d')
 
-#ifdef _POSIX_VDISABLE
-#define CEOL _POSIX_VDISABLE
-#define CSTATUS _POSIX_VDISABLE
-#else
 #define CEOL '\0'
 #define CSTATUS '\0'
-#endif
 
 #define CERASE 0177
 #define CINTR CTRL('c')
diff --git a/lib/libc/include/generic-musl/sys/wait.h b/lib/libc/include/generic-musl/sys/wait.h
index 352fdcadf1..0ad11ab54f 100644
--- a/lib/libc/include/generic-musl/sys/wait.h
+++ b/lib/libc/include/generic-musl/sys/wait.h
@@ -13,7 +13,8 @@ extern "C" {
 typedef enum {
 	P_ALL = 0,
 	P_PID = 1,
-	P_PGID = 2
+	P_PGID = 2,
+	P_PIDFD = 3
 } idtype_t;
 
 pid_t wait (int *);
@@ -53,6 +54,13 @@ pid_t wait4 (pid_t, int *, int, struct rusage *);
 #define WIFSIGNALED(s) (((s)&0xffff)-1U < 0xffu)
 #define WIFCONTINUED(s) ((s) == 0xffff)
 
+#if _REDIR_TIME64
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+__REDIR(wait3, __wait3_time64);
+__REDIR(wait4, __wait4_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/threads.h b/lib/libc/include/generic-musl/threads.h
index 51ef3bad7b..cecff6647c 100644
--- a/lib/libc/include/generic-musl/threads.h
+++ b/lib/libc/include/generic-musl/threads.h
@@ -80,6 +80,12 @@ void tss_delete(tss_t);
 int tss_set(tss_t, void *);
 void *tss_get(tss_t);
 
+#if _REDIR_TIME64
+__REDIR(thrd_sleep, __thrd_sleep_time64);
+__REDIR(mtx_timedlock, __mtx_timedlock_time64);
+__REDIR(cnd_timedwait, __cnd_timedwait_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/time.h b/lib/libc/include/generic-musl/time.h
index 755c6ad7aa..5a9f61eb4d 100644
--- a/lib/libc/include/generic-musl/time.h
+++ b/lib/libc/include/generic-musl/time.h
@@ -130,6 +130,34 @@ int stime(const time_t *);
 time_t timegm(struct tm *);
 #endif
 
+#if _REDIR_TIME64
+__REDIR(time, __time64);
+__REDIR(difftime, __difftime64);
+__REDIR(mktime, __mktime64);
+__REDIR(gmtime, __gmtime64);
+__REDIR(localtime, __localtime64);
+__REDIR(ctime, __ctime64);
+__REDIR(timespec_get, __timespec_get_time64);
+#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
+ || defined(_BSD_SOURCE)
+__REDIR(gmtime_r, __gmtime64_r);
+__REDIR(localtime_r, __localtime64_r);
+__REDIR(ctime_r, __ctime64_r);
+__REDIR(nanosleep, __nanosleep_time64);
+__REDIR(clock_getres, __clock_getres_time64);
+__REDIR(clock_gettime, __clock_gettime64);
+__REDIR(clock_settime, __clock_settime64);
+__REDIR(clock_nanosleep, __clock_nanosleep_time64);
+__REDIR(timer_settime, __timer_settime64);
+__REDIR(timer_gettime, __timer_gettime64);
+#endif
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+__REDIR(stime, __stime64);
+__REDIR(timegm, __timegm_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/utime.h b/lib/libc/include/generic-musl/utime.h
index 89c2bc8013..1ad5c49c5d 100644
--- a/lib/libc/include/generic-musl/utime.h
+++ b/lib/libc/include/generic-musl/utime.h
@@ -5,6 +5,8 @@
 extern "C" {
 #endif
 
+#include <features.h>
+
 #define __NEED_time_t
 
 #include <bits/alltypes.h>
@@ -16,6 +18,10 @@ struct utimbuf {
 
 int utime (const char *, const struct utimbuf *);
 
+#if _REDIR_TIME64
+__REDIR(utime, __utime64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/include/generic-musl/utmpx.h b/lib/libc/include/generic-musl/utmpx.h
index 769101a2fe..29fa60d2f1 100644
--- a/lib/libc/include/generic-musl/utmpx.h
+++ b/lib/libc/include/generic-musl/utmpx.h
@@ -16,6 +16,7 @@ extern "C" {
 
 struct utmpx {
 	short ut_type;
+	short __ut_pad1;
 	pid_t ut_pid;
 	char ut_line[32];
 	char ut_id[4];
@@ -25,7 +26,11 @@ struct utmpx {
 		short __e_termination;
 		short __e_exit;
 	} ut_exit;
-	long ut_session;
+#if __BYTE_ORDER == 1234
+	int ut_session, __ut_pad2;
+#else
+	int __ut_pad2, ut_session;
+#endif
 	struct timeval ut_tv;
 	unsigned ut_addr_v6[4];
 	char __unused[20];
diff --git a/lib/libc/include/i386-linux-musl/bits/alltypes.h b/lib/libc/include/i386-linux-musl/bits/alltypes.h
index b4a1272fe6..c330f5dd05 100644
--- a/lib/libc/include/i386-linux-musl/bits/alltypes.h
+++ b/lib/libc/include/i386-linux-musl/bits/alltypes.h
@@ -1,30 +1,10 @@
+#define _REDIR_TIME64 1
 #define _Addr int
 #define _Int64 long long
 #define _Reg int
 
-#if __GNUC__ >= 3
-#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
-typedef __builtin_va_list va_list;
-#define __DEFINED_va_list
-#endif
-
-#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
-typedef __builtin_va_list __isoc_va_list;
-#define __DEFINED___isoc_va_list
-#endif
-
-#else
-#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
-typedef struct __va_list * va_list;
-#define __DEFINED_va_list
-#endif
-
-#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
-typedef struct __va_list * __isoc_va_list;
-#define __DEFINED___isoc_va_list
-#endif
-
-#endif
+#define __BYTE_ORDER 1234
+#define __LONG_MAX 0x7fffffffL
 
 #ifndef __cplusplus
 #ifdef __WCHAR_TYPE__
@@ -85,52 +65,9 @@ typedef struct { alignas(8) long long __ll; long double __ld; } max_align_t;
 #endif
 
 #endif
-
-#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
-typedef long time_t;
-#define __DEFINED_time_t
-#endif
-
-#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
-typedef long suseconds_t;
-#define __DEFINED_suseconds_t
-#endif
-
-
-#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
-typedef struct { union { int __i[9]; volatile int __vi[9]; unsigned __s[9]; } __u; } pthread_attr_t;
-#define __DEFINED_pthread_attr_t
-#endif
-
-#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
-typedef struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } pthread_mutex_t;
-#define __DEFINED_pthread_mutex_t
-#endif
-
-#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
-typedef struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } mtx_t;
-#define __DEFINED_mtx_t
-#endif
-
-#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } pthread_cond_t;
-#define __DEFINED_pthread_cond_t
-#endif
-
-#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } cnd_t;
-#define __DEFINED_cnd_t
-#endif
-
-#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
-typedef struct { union { int __i[8]; volatile int __vi[8]; void *__p[8]; } __u; } pthread_rwlock_t;
-#define __DEFINED_pthread_rwlock_t
-#endif
-
-#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
-typedef struct { union { int __i[5]; volatile int __vi[5]; void *__p[5]; } __u; } pthread_barrier_t;
-#define __DEFINED_pthread_barrier_t
-#endif
+#define __LITTLE_ENDIAN 1234
+#define __BIG_ENDIAN 4321
+#define __USE_TIME_BITS64 1
 
 #if defined(__NEED_size_t) && !defined(__DEFINED_size_t)
 typedef unsigned _Addr size_t;
@@ -167,6 +104,16 @@ typedef _Reg register_t;
 #define __DEFINED_register_t
 #endif
 
+#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
+typedef _Int64 time_t;
+#define __DEFINED_time_t
+#endif
+
+#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
+typedef _Int64 suseconds_t;
+#define __DEFINED_suseconds_t
+#endif
+
 
 #if defined(__NEED_int8_t) && !defined(__DEFINED_int8_t)
 typedef signed char     int8_t;
@@ -302,7 +249,7 @@ struct timeval { time_t tv_sec; suseconds_t tv_usec; };
 #endif
 
 #if defined(__NEED_struct_timespec) && !defined(__DEFINED_struct_timespec)
-struct timespec { time_t tv_sec; long tv_nsec; };
+struct timespec { time_t tv_sec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER==4321); long tv_nsec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER!=4321); };
 #define __DEFINED_struct_timespec
 #endif
 
@@ -398,6 +345,17 @@ typedef struct _IO_FILE FILE;
 #endif
 
 
+#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
+typedef __builtin_va_list va_list;
+#define __DEFINED_va_list
+#endif
+
+#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
+typedef __builtin_va_list __isoc_va_list;
+#define __DEFINED___isoc_va_list
+#endif
+
+
 #if defined(__NEED_mbstate_t) && !defined(__DEFINED_mbstate_t)
 typedef struct __mbstate_t { unsigned __opaque1, __opaque2; } mbstate_t;
 #define __DEFINED_mbstate_t
@@ -433,6 +391,42 @@ typedef unsigned short sa_family_t;
 #endif
 
 
+#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
+typedef struct { union { int __i[sizeof(long)==8?14:9]; volatile int __vi[sizeof(long)==8?14:9]; unsigned long __s[sizeof(long)==8?7:9]; } __u; } pthread_attr_t;
+#define __DEFINED_pthread_attr_t
+#endif
+
+#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } pthread_mutex_t;
+#define __DEFINED_pthread_mutex_t
+#endif
+
+#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } mtx_t;
+#define __DEFINED_mtx_t
+#endif
+
+#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } pthread_cond_t;
+#define __DEFINED_pthread_cond_t
+#endif
+
+#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } cnd_t;
+#define __DEFINED_cnd_t
+#endif
+
+#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
+typedef struct { union { int __i[sizeof(long)==8?14:8]; volatile int __vi[sizeof(long)==8?14:8]; void *__p[sizeof(long)==8?7:8]; } __u; } pthread_rwlock_t;
+#define __DEFINED_pthread_rwlock_t
+#endif
+
+#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
+typedef struct { union { int __i[sizeof(long)==8?8:5]; volatile int __vi[sizeof(long)==8?8:5]; void *__p[sizeof(long)==8?4:5]; } __u; } pthread_barrier_t;
+#define __DEFINED_pthread_barrier_t
+#endif
+
+
 #undef _Addr
 #undef _Int64
 #undef _Reg
\ No newline at end of file
diff --git a/lib/libc/include/i386-linux-musl/bits/ipcstat.h b/lib/libc/include/i386-linux-musl/bits/ipcstat.h
new file mode 100644
index 0000000000..d055f3e837
--- /dev/null
+++ b/lib/libc/include/i386-linux-musl/bits/ipcstat.h
@@ -0,0 +1 @@
+#define IPC_STAT 0x102
\ No newline at end of file
diff --git a/lib/libc/include/i386-linux-musl/bits/limits.h b/lib/libc/include/i386-linux-musl/bits/limits.h
index 208e36bcd7..fc11433d98 100644
--- a/lib/libc/include/i386-linux-musl/bits/limits.h
+++ b/lib/libc/include/i386-linux-musl/bits/limits.h
@@ -1,8 +1 @@
-#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-#define PAGESIZE 4096
-#define LONG_BIT 32
-#endif
-
-#define LONG_MAX  0x7fffffffL
-#define LLONG_MAX  0x7fffffffffffffffLL
\ No newline at end of file
+#define PAGESIZE 4096
\ No newline at end of file
diff --git a/lib/libc/include/i386-linux-musl/bits/msg.h b/lib/libc/include/i386-linux-musl/bits/msg.h
index e5c8ba7520..037fd956d4 100644
--- a/lib/libc/include/i386-linux-musl/bits/msg.h
+++ b/lib/libc/include/i386-linux-musl/bits/msg.h
@@ -1,15 +1,18 @@
 struct msqid_ds {
 	struct ipc_perm msg_perm;
-	time_t msg_stime;
-	int __unused1;
-	time_t msg_rtime;
-	int __unused2;
-	time_t msg_ctime;
-	int __unused3;
+	unsigned long __msg_stime_lo;
+	unsigned long __msg_stime_hi;
+	unsigned long __msg_rtime_lo;
+	unsigned long __msg_rtime_hi;
+	unsigned long __msg_ctime_lo;
+	unsigned long __msg_ctime_hi;
 	unsigned long msg_cbytes;
 	msgqnum_t msg_qnum;
 	msglen_t msg_qbytes;
 	pid_t msg_lspid;
 	pid_t msg_lrpid;
 	unsigned long __unused[2];
+	time_t msg_stime;
+	time_t msg_rtime;
+	time_t msg_ctime;
 };
\ No newline at end of file
diff --git a/lib/libc/include/i386-linux-musl/bits/sem.h b/lib/libc/include/i386-linux-musl/bits/sem.h
index e63d0732bb..f4936d6f5a 100644
--- a/lib/libc/include/i386-linux-musl/bits/sem.h
+++ b/lib/libc/include/i386-linux-musl/bits/sem.h
@@ -1,11 +1,13 @@
 struct semid_ds {
 	struct ipc_perm sem_perm;
-	time_t sem_otime;
-	long __unused1;
-	time_t sem_ctime;
-	long __unused2;
+	unsigned long __sem_otime_lo;
+	unsigned long __sem_otime_hi;
+	unsigned long __sem_ctime_lo;
+	unsigned long __sem_ctime_hi;
 	unsigned short sem_nsems;
 	char __sem_nsems_pad[sizeof(long)-sizeof(short)];
 	long __unused3;
 	long __unused4;
+	time_t sem_otime;
+	time_t sem_ctime;
 };
\ No newline at end of file
diff --git a/lib/libc/include/i386-linux-musl/bits/shm.h b/lib/libc/include/i386-linux-musl/bits/shm.h
index aa5587127a..1ecb03ca0e 100644
--- a/lib/libc/include/i386-linux-musl/bits/shm.h
+++ b/lib/libc/include/i386-linux-musl/bits/shm.h
@@ -3,17 +3,21 @@
 struct shmid_ds {
 	struct ipc_perm shm_perm;
 	size_t shm_segsz;
-	time_t shm_atime;
-	int __unused1;
-	time_t shm_dtime;
-	int __unused2;
-	time_t shm_ctime;
-	int __unused3;
+	unsigned long __shm_atime_lo;
+	unsigned long __shm_atime_hi;
+	unsigned long __shm_dtime_lo;
+	unsigned long __shm_dtime_hi;
+	unsigned long __shm_ctime_lo;
+	unsigned long __shm_ctime_hi;
 	pid_t shm_cpid;
 	pid_t shm_lpid;
 	unsigned long shm_nattch;
 	unsigned long __pad1;
 	unsigned long __pad2;
+	unsigned long __pad3;
+	time_t shm_atime;
+	time_t shm_dtime;
+	time_t shm_ctime;
 };
 
 struct shminfo {
diff --git a/lib/libc/include/i386-linux-musl/bits/stat.h b/lib/libc/include/i386-linux-musl/bits/stat.h
index 78e91b4028..3bf02b3756 100644
--- a/lib/libc/include/i386-linux-musl/bits/stat.h
+++ b/lib/libc/include/i386-linux-musl/bits/stat.h
@@ -14,8 +14,12 @@ struct stat {
 	off_t st_size;
 	blksize_t st_blksize;
 	blkcnt_t st_blocks;
+	struct {
+		long tv_sec;
+		long tv_nsec;
+	} __st_atim32, __st_mtim32, __st_ctim32;
+	ino_t st_ino;
 	struct timespec st_atim;
 	struct timespec st_mtim;
 	struct timespec st_ctim;
-	ino_t st_ino;
 };
\ No newline at end of file
diff --git a/lib/libc/include/i386-linux-musl/bits/syscall.h b/lib/libc/include/i386-linux-musl/bits/syscall.h
index 482f1d1d19..c9bfc7f95e 100644
--- a/lib/libc/include/i386-linux-musl/bits/syscall.h
+++ b/lib/libc/include/i386-linux-musl/bits/syscall.h
@@ -76,8 +76,8 @@
 #define __NR_setrlimit		 75
 #define __NR_getrlimit		 76   /* Back compatible 2Gig limited rlimit */
 #define __NR_getrusage		 77
-#define __NR_gettimeofday	 78
-#define __NR_settimeofday	 79
+#define __NR_gettimeofday_time32	 78
+#define __NR_settimeofday_time32	 79
 #define __NR_getgroups		 80
 #define __NR_setgroups		 81
 #define __NR_select		 82
@@ -257,14 +257,14 @@
 #define __NR_remap_file_pages	257
 #define __NR_set_tid_address	258
 #define __NR_timer_create	259
-#define __NR_timer_settime	(__NR_timer_create+1)
-#define __NR_timer_gettime	(__NR_timer_create+2)
+#define __NR_timer_settime32	(__NR_timer_create+1)
+#define __NR_timer_gettime32	(__NR_timer_create+2)
 #define __NR_timer_getoverrun	(__NR_timer_create+3)
 #define __NR_timer_delete	(__NR_timer_create+4)
-#define __NR_clock_settime	(__NR_timer_create+5)
-#define __NR_clock_gettime	(__NR_timer_create+6)
-#define __NR_clock_getres	(__NR_timer_create+7)
-#define __NR_clock_nanosleep	(__NR_timer_create+8)
+#define __NR_clock_settime32	(__NR_timer_create+5)
+#define __NR_clock_gettime32	(__NR_timer_create+6)
+#define __NR_clock_getres_time32	(__NR_timer_create+7)
+#define __NR_clock_nanosleep_time32	(__NR_timer_create+8)
 #define __NR_statfs64		268
 #define __NR_fstatfs64		269
 #define __NR_tgkill		270
@@ -322,8 +322,8 @@
 #define __NR_timerfd_create	322
 #define __NR_eventfd		323
 #define __NR_fallocate		324
-#define __NR_timerfd_settime	325
-#define __NR_timerfd_gettime	326
+#define __NR_timerfd_settime32	325
+#define __NR_timerfd_gettime32	326
 #define __NR_signalfd4		327
 #define __NR_eventfd2		328
 #define __NR_epoll_create1	329
@@ -424,6 +424,8 @@
 #define __NR_fsconfig		431
 #define __NR_fsmount		432
 #define __NR_fspick		433
+#define __NR_pidfd_open		434
+#define __NR_clone3		435
 
 #define SYS_restart_syscall      0
 #define SYS_exit		  1
@@ -503,8 +505,8 @@
 #define SYS_setrlimit		 75
 #define SYS_getrlimit		 76   /* Back compatible 2Gig limited rlimit */
 #define SYS_getrusage		 77
-#define SYS_gettimeofday	 78
-#define SYS_settimeofday	 79
+#define SYS_gettimeofday_time32	 78
+#define SYS_settimeofday_time32	 79
 #define SYS_getgroups		 80
 #define SYS_setgroups		 81
 #define SYS_select		 82
@@ -682,14 +684,14 @@
 #define SYS_remap_file_pages	257
 #define SYS_set_tid_address	258
 #define SYS_timer_create	259
-#define SYS_timer_settime	(__NR_timer_create+1)
-#define SYS_timer_gettime	(__NR_timer_create+2)
+#define SYS_timer_settime32	(__NR_timer_create+1)
+#define SYS_timer_gettime32	(__NR_timer_create+2)
 #define SYS_timer_getoverrun	(__NR_timer_create+3)
 #define SYS_timer_delete	(__NR_timer_create+4)
-#define SYS_clock_settime	(__NR_timer_create+5)
-#define SYS_clock_gettime	(__NR_timer_create+6)
-#define SYS_clock_getres	(__NR_timer_create+7)
-#define SYS_clock_nanosleep	(__NR_timer_create+8)
+#define SYS_clock_settime32	(__NR_timer_create+5)
+#define SYS_clock_gettime32	(__NR_timer_create+6)
+#define SYS_clock_getres_time32	(__NR_timer_create+7)
+#define SYS_clock_nanosleep_time32	(__NR_timer_create+8)
 #define SYS_statfs64		268
 #define SYS_fstatfs64		269
 #define SYS_tgkill		270
@@ -747,8 +749,8 @@
 #define SYS_timerfd_create	322
 #define SYS_eventfd		323
 #define SYS_fallocate		324
-#define SYS_timerfd_settime	325
-#define SYS_timerfd_gettime	326
+#define SYS_timerfd_settime32	325
+#define SYS_timerfd_gettime32	326
 #define SYS_signalfd4		327
 #define SYS_eventfd2		328
 #define SYS_epoll_create1	329
@@ -848,4 +850,6 @@
 #define SYS_fsopen		430
 #define SYS_fsconfig		431
 #define SYS_fsmount		432
-#define SYS_fspick		433
\ No newline at end of file
+#define SYS_fspick		433
+#define SYS_pidfd_open		434
+#define SYS_clone3		435
\ No newline at end of file
diff --git a/lib/libc/include/mips-linux-musl/bits/alltypes.h b/lib/libc/include/mips-linux-musl/bits/alltypes.h
index d0f00474bd..c714577aaa 100644
--- a/lib/libc/include/mips-linux-musl/bits/alltypes.h
+++ b/lib/libc/include/mips-linux-musl/bits/alltypes.h
@@ -1,17 +1,15 @@
+#define _REDIR_TIME64 1
 #define _Addr int
 #define _Int64 long long
 #define _Reg int
 
-#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
-typedef __builtin_va_list va_list;
-#define __DEFINED_va_list
-#endif
-
-#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
-typedef __builtin_va_list __isoc_va_list;
-#define __DEFINED___isoc_va_list
+#if _MIPSEL || __MIPSEL || __MIPSEL__
+#define __BYTE_ORDER 1234
+#else
+#define __BYTE_ORDER 4321
 #endif
 
+#define __LONG_MAX 0x7fffffffL
 
 #ifndef __cplusplus
 #if defined(__NEED_wchar_t) && !defined(__DEFINED_wchar_t)
@@ -37,52 +35,9 @@ typedef struct { long long __ll; long double __ld; } max_align_t;
 #define __DEFINED_max_align_t
 #endif
 
-
-#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
-typedef long time_t;
-#define __DEFINED_time_t
-#endif
-
-#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
-typedef long suseconds_t;
-#define __DEFINED_suseconds_t
-#endif
-
-
-#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
-typedef struct { union { int __i[9]; volatile int __vi[9]; unsigned __s[9]; } __u; } pthread_attr_t;
-#define __DEFINED_pthread_attr_t
-#endif
-
-#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
-typedef struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } pthread_mutex_t;
-#define __DEFINED_pthread_mutex_t
-#endif
-
-#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
-typedef struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } mtx_t;
-#define __DEFINED_mtx_t
-#endif
-
-#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } pthread_cond_t;
-#define __DEFINED_pthread_cond_t
-#endif
-
-#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } cnd_t;
-#define __DEFINED_cnd_t
-#endif
-
-#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
-typedef struct { union { int __i[8]; volatile int __vi[8]; void *__p[8]; } __u; } pthread_rwlock_t;
-#define __DEFINED_pthread_rwlock_t
-#endif
-
-#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
-typedef struct { union { int __i[5]; volatile int __vi[5]; void *__p[5]; } __u; } pthread_barrier_t;
-#define __DEFINED_pthread_barrier_t
-#endif
+#define __LITTLE_ENDIAN 1234
+#define __BIG_ENDIAN 4321
+#define __USE_TIME_BITS64 1
 
 #if defined(__NEED_size_t) && !defined(__DEFINED_size_t)
 typedef unsigned _Addr size_t;
@@ -119,6 +74,16 @@ typedef _Reg register_t;
 #define __DEFINED_register_t
 #endif
 
+#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
+typedef _Int64 time_t;
+#define __DEFINED_time_t
+#endif
+
+#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
+typedef _Int64 suseconds_t;
+#define __DEFINED_suseconds_t
+#endif
+
 
 #if defined(__NEED_int8_t) && !defined(__DEFINED_int8_t)
 typedef signed char     int8_t;
@@ -254,7 +219,7 @@ struct timeval { time_t tv_sec; suseconds_t tv_usec; };
 #endif
 
 #if defined(__NEED_struct_timespec) && !defined(__DEFINED_struct_timespec)
-struct timespec { time_t tv_sec; long tv_nsec; };
+struct timespec { time_t tv_sec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER==4321); long tv_nsec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER!=4321); };
 #define __DEFINED_struct_timespec
 #endif
 
@@ -350,6 +315,17 @@ typedef struct _IO_FILE FILE;
 #endif
 
 
+#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
+typedef __builtin_va_list va_list;
+#define __DEFINED_va_list
+#endif
+
+#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
+typedef __builtin_va_list __isoc_va_list;
+#define __DEFINED___isoc_va_list
+#endif
+
+
 #if defined(__NEED_mbstate_t) && !defined(__DEFINED_mbstate_t)
 typedef struct __mbstate_t { unsigned __opaque1, __opaque2; } mbstate_t;
 #define __DEFINED_mbstate_t
@@ -385,6 +361,42 @@ typedef unsigned short sa_family_t;
 #endif
 
 
+#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
+typedef struct { union { int __i[sizeof(long)==8?14:9]; volatile int __vi[sizeof(long)==8?14:9]; unsigned long __s[sizeof(long)==8?7:9]; } __u; } pthread_attr_t;
+#define __DEFINED_pthread_attr_t
+#endif
+
+#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } pthread_mutex_t;
+#define __DEFINED_pthread_mutex_t
+#endif
+
+#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } mtx_t;
+#define __DEFINED_mtx_t
+#endif
+
+#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } pthread_cond_t;
+#define __DEFINED_pthread_cond_t
+#endif
+
+#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } cnd_t;
+#define __DEFINED_cnd_t
+#endif
+
+#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
+typedef struct { union { int __i[sizeof(long)==8?14:8]; volatile int __vi[sizeof(long)==8?14:8]; void *__p[sizeof(long)==8?7:8]; } __u; } pthread_rwlock_t;
+#define __DEFINED_pthread_rwlock_t
+#endif
+
+#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
+typedef struct { union { int __i[sizeof(long)==8?8:5]; volatile int __vi[sizeof(long)==8?8:5]; void *__p[sizeof(long)==8?4:5]; } __u; } pthread_barrier_t;
+#define __DEFINED_pthread_barrier_t
+#endif
+
+
 #undef _Addr
 #undef _Int64
 #undef _Reg
\ No newline at end of file
diff --git a/lib/libc/include/mips-linux-musl/bits/endian.h b/lib/libc/include/mips-linux-musl/bits/endian.h
deleted file mode 100644
index e888a1939f..0000000000
--- a/lib/libc/include/mips-linux-musl/bits/endian.h
+++ /dev/null
@@ -1,5 +0,0 @@
-#if _MIPSEL || __MIPSEL || __MIPSEL__
-#define __BYTE_ORDER __LITTLE_ENDIAN
-#else
-#define __BYTE_ORDER __BIG_ENDIAN
-#endif
\ No newline at end of file
diff --git a/lib/libc/include/mips-linux-musl/bits/hwcap.h b/lib/libc/include/mips-linux-musl/bits/hwcap.h
index 0cc1faa9f7..bcdd936f16 100644
--- a/lib/libc/include/mips-linux-musl/bits/hwcap.h
+++ b/lib/libc/include/mips-linux-musl/bits/hwcap.h
@@ -1,3 +1,14 @@
 #define HWCAP_MIPS_R6		(1 << 0)
 #define HWCAP_MIPS_MSA		(1 << 1)
-#define HWCAP_MIPS_CRC32	(1 << 2)
\ No newline at end of file
+#define HWCAP_MIPS_CRC32	(1 << 2)
+#define HWCAP_MIPS_MIPS16	(1 << 3)
+#define HWCAP_MIPS_MDMX		(1 << 4)
+#define HWCAP_MIPS_MIPS3D	(1 << 5)
+#define HWCAP_MIPS_SMARTMIPS	(1 << 6)
+#define HWCAP_MIPS_DSP		(1 << 7)
+#define HWCAP_MIPS_DSP2		(1 << 8)
+#define HWCAP_MIPS_DSP3		(1 << 9)
+#define HWCAP_MIPS_MIPS16E2	(1 << 10)
+#define HWCAP_LOONGSON_MMI	(1 << 11)
+#define HWCAP_LOONGSON_EXT	(1 << 12)
+#define HWCAP_LOONGSON_EXT2	(1 << 13)
\ No newline at end of file
diff --git a/lib/libc/include/mips-linux-musl/bits/ioctl.h b/lib/libc/include/mips-linux-musl/bits/ioctl.h
index ce20d2e760..c4fbd0d8df 100644
--- a/lib/libc/include/mips-linux-musl/bits/ioctl.h
+++ b/lib/libc/include/mips-linux-musl/bits/ioctl.h
@@ -110,5 +110,5 @@
 #define SIOCATMARK      _IOR('s', 7, int)
 #define SIOCSPGRP       _IOW('s', 8, pid_t)
 #define SIOCGPGRP       _IOR('s', 9, pid_t)
-#define SIOCGSTAMP      0x8906
-#define SIOCGSTAMPNS    0x8907
\ No newline at end of file
+#define SIOCGSTAMP      _IOR(0x89, 6, char[16])
+#define SIOCGSTAMPNS    _IOR(0x89, 7, char[16])
\ No newline at end of file
diff --git a/lib/libc/include/mips-linux-musl/bits/ipcstat.h b/lib/libc/include/mips-linux-musl/bits/ipcstat.h
new file mode 100644
index 0000000000..d055f3e837
--- /dev/null
+++ b/lib/libc/include/mips-linux-musl/bits/ipcstat.h
@@ -0,0 +1 @@
+#define IPC_STAT 0x102
\ No newline at end of file
diff --git a/lib/libc/include/mips-linux-musl/bits/limits.h b/lib/libc/include/mips-linux-musl/bits/limits.h
deleted file mode 100644
index ba9c3aa003..0000000000
--- a/lib/libc/include/mips-linux-musl/bits/limits.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-#define LONG_BIT 32
-#endif
-
-#define LONG_MAX  0x7fffffffL
-#define LLONG_MAX  0x7fffffffffffffffLL
\ No newline at end of file
diff --git a/lib/libc/include/mips-linux-musl/bits/msg.h b/lib/libc/include/mips-linux-musl/bits/msg.h
index f310867d19..9e428cabd5 100644
--- a/lib/libc/include/mips-linux-musl/bits/msg.h
+++ b/lib/libc/include/mips-linux-musl/bits/msg.h
@@ -1,19 +1,19 @@
 struct msqid_ds {
 	struct ipc_perm msg_perm;
 #if _MIPSEL || __MIPSEL || __MIPSEL__
-	time_t msg_stime;
-	int __unused1;
-	time_t msg_rtime;
-	int __unused2;
-	time_t msg_ctime;
-	int __unused3;
+	unsigned long __msg_stime_lo;
+	unsigned long __msg_stime_hi;
+	unsigned long __msg_rtime_lo;
+	unsigned long __msg_rtime_hi;
+	unsigned long __msg_ctime_lo;
+	unsigned long __msg_ctime_hi;
 #else
-	int __unused1;
-	time_t msg_stime;
-	int __unused2;
-	time_t msg_rtime;
-	int __unused3;
-	time_t msg_ctime;
+	unsigned long __msg_stime_hi;
+	unsigned long __msg_stime_lo;
+	unsigned long __msg_rtime_hi;
+	unsigned long __msg_rtime_lo;
+	unsigned long __msg_ctime_hi;
+	unsigned long __msg_ctime_lo;
 #endif
 	unsigned long msg_cbytes;
 	msgqnum_t msg_qnum;
@@ -21,4 +21,7 @@ struct msqid_ds {
 	pid_t msg_lspid;
 	pid_t msg_lrpid;
 	unsigned long __unused[2];
+	time_t msg_stime;
+	time_t msg_rtime;
+	time_t msg_ctime;
 };
\ No newline at end of file
diff --git a/lib/libc/include/mips-linux-musl/bits/sem.h b/lib/libc/include/mips-linux-musl/bits/sem.h
new file mode 100644
index 0000000000..87b05d488d
--- /dev/null
+++ b/lib/libc/include/mips-linux-musl/bits/sem.h
@@ -0,0 +1,16 @@
+struct semid_ds {
+	struct ipc_perm sem_perm;
+	unsigned long __sem_otime_lo;
+	unsigned long __sem_ctime_lo;
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+	unsigned short sem_nsems;
+	char __sem_nsems_pad[sizeof(long)-sizeof(short)];
+#else
+	char __sem_nsems_pad[sizeof(long)-sizeof(short)];
+	unsigned short sem_nsems;
+#endif
+	unsigned long __sem_otime_hi;
+	unsigned long __sem_ctime_hi;
+	time_t sem_otime;
+	time_t sem_ctime;
+};
\ No newline at end of file
diff --git a/lib/libc/include/mips-linux-musl/bits/shm.h b/lib/libc/include/mips-linux-musl/bits/shm.h
new file mode 100644
index 0000000000..4e5357d24f
--- /dev/null
+++ b/lib/libc/include/mips-linux-musl/bits/shm.h
@@ -0,0 +1,29 @@
+#define SHMLBA 4096
+
+struct shmid_ds {
+	struct ipc_perm shm_perm;
+	size_t shm_segsz;
+	unsigned long __shm_atime_lo;
+	unsigned long __shm_dtime_lo;
+	unsigned long __shm_ctime_lo;
+	pid_t shm_cpid;
+	pid_t shm_lpid;
+	unsigned long shm_nattch;
+	unsigned short __shm_atime_hi;
+	unsigned short __shm_dtime_hi;
+	unsigned short __shm_ctime_hi;
+	unsigned short __pad1;
+	time_t shm_atime;
+	time_t shm_dtime;
+	time_t shm_ctime;
+};
+
+struct shminfo {
+	unsigned long shmmax, shmmin, shmmni, shmseg, shmall, __unused[4];
+};
+
+struct shm_info {
+	int __used_ids;
+	unsigned long shm_tot, shm_rss, shm_swp;
+	unsigned long __swap_attempts, __swap_successes;
+};
\ No newline at end of file
diff --git a/lib/libc/include/mips-linux-musl/bits/signal.h b/lib/libc/include/mips-linux-musl/bits/signal.h
index 8a7d5852ed..f9a6ea657a 100644
--- a/lib/libc/include/mips-linux-musl/bits/signal.h
+++ b/lib/libc/include/mips-linux-musl/bits/signal.h
@@ -19,14 +19,18 @@ typedef struct {
 } fpregset_t;
 struct sigcontext {
 	unsigned sc_regmask, sc_status;
-	unsigned long long sc_pc, sc_regs[32], sc_fpregs[32];
+	unsigned long long sc_pc;
+	gregset_t sc_regs;
+	fpregset_t sc_fpregs;
 	unsigned sc_ownedfp, sc_fpc_csr, sc_fpc_eir, sc_used_math, sc_dsp;
 	unsigned long long sc_mdhi, sc_mdlo;
 	unsigned long sc_hi1, sc_lo1, sc_hi2, sc_lo2, sc_hi3, sc_lo3;
 };
 typedef struct {
 	unsigned regmask, status;
-	unsigned long long pc, gregs[32], fpregs[32];
+	unsigned long long pc;
+	gregset_t gregs;
+	fpregset_t fpregs;
 	unsigned ownedfp, fpc_csr, fpc_eir, used_math, dsp;
 	unsigned long long mdhi, mdlo;
 	unsigned long hi1, lo1, hi2, lo2, hi3, lo3;
diff --git a/lib/libc/include/mips-linux-musl/bits/socket.h b/lib/libc/include/mips-linux-musl/bits/socket.h
index dd4c03b7f6..751f71fc47 100644
--- a/lib/libc/include/mips-linux-musl/bits/socket.h
+++ b/lib/libc/include/mips-linux-musl/bits/socket.h
@@ -1,19 +1,3 @@
-struct msghdr {
-	void *msg_name;
-	socklen_t msg_namelen;
-	struct iovec *msg_iov;
-	int msg_iovlen;
-	void *msg_control;
-	socklen_t msg_controllen;
-	int msg_flags;
-};
-
-struct cmsghdr {
-	socklen_t cmsg_len;
-	int cmsg_level;
-	int cmsg_type;
-};
-
 #define SOCK_STREAM    2
 #define SOCK_DGRAM     1
 
@@ -32,8 +16,6 @@ struct cmsghdr {
 #define SO_RCVBUF       0x1002
 #define SO_SNDLOWAT     0x1003
 #define SO_RCVLOWAT     0x1004
-#define SO_RCVTIMEO     0x1006
-#define SO_SNDTIMEO     0x1005
 #define SO_ERROR        0x1007
 #define SO_TYPE         0x1008
 #define SO_ACCEPTCONN   0x1009
diff --git a/lib/libc/include/mips-linux-musl/bits/stat.h b/lib/libc/include/mips-linux-musl/bits/stat.h
index 5e9d7ce475..f247f6983d 100644
--- a/lib/libc/include/mips-linux-musl/bits/stat.h
+++ b/lib/libc/include/mips-linux-musl/bits/stat.h
@@ -12,11 +12,15 @@ struct stat {
 	dev_t st_rdev;
 	long __st_padding2[2];
 	off_t st_size;
-	struct timespec st_atim;
-	struct timespec st_mtim;
-	struct timespec st_ctim;
+	struct {
+		long tv_sec;
+		long tv_nsec;
+	} __st_atim32, __st_mtim32, __st_ctim32;
 	blksize_t st_blksize;
 	long __st_padding3;
 	blkcnt_t st_blocks;
-        long __st_padding4[14];
+	struct timespec st_atim;
+	struct timespec st_mtim;
+	struct timespec st_ctim;
+	long __st_padding4[2];
 };
\ No newline at end of file
diff --git a/lib/libc/include/mips-linux-musl/bits/syscall.h b/lib/libc/include/mips-linux-musl/bits/syscall.h
index 67bd95fa5c..3f2666e56f 100644
--- a/lib/libc/include/mips-linux-musl/bits/syscall.h
+++ b/lib/libc/include/mips-linux-musl/bits/syscall.h
@@ -76,8 +76,8 @@
 #define __NR_setrlimit               4075
 #define __NR_getrlimit               4076
 #define __NR_getrusage               4077
-#define __NR_gettimeofday            4078
-#define __NR_settimeofday            4079
+#define __NR_gettimeofday_time32            4078
+#define __NR_settimeofday_time32            4079
 #define __NR_getgroups               4080
 #define __NR_setgroups               4081
 #define __NR_reserved82              4082
@@ -256,14 +256,14 @@
 #define __NR_statfs64                4255
 #define __NR_fstatfs64               4256
 #define __NR_timer_create            4257
-#define __NR_timer_settime           4258
-#define __NR_timer_gettime           4259
+#define __NR_timer_settime32           4258
+#define __NR_timer_gettime32           4259
 #define __NR_timer_getoverrun        4260
 #define __NR_timer_delete            4261
-#define __NR_clock_settime           4262
-#define __NR_clock_gettime           4263
-#define __NR_clock_getres            4264
-#define __NR_clock_nanosleep         4265
+#define __NR_clock_settime32           4262
+#define __NR_clock_gettime32           4263
+#define __NR_clock_getres_time32            4264
+#define __NR_clock_nanosleep_time32         4265
 #define __NR_tgkill                  4266
 #define __NR_utimes                  4267
 #define __NR_mbind                   4268
@@ -319,8 +319,8 @@
 #define __NR_eventfd                 4319
 #define __NR_fallocate               4320
 #define __NR_timerfd_create          4321
-#define __NR_timerfd_gettime         4322
-#define __NR_timerfd_settime         4323
+#define __NR_timerfd_gettime32         4322
+#define __NR_timerfd_settime32         4323
 #define __NR_signalfd4               4324
 #define __NR_eventfd2                4325
 #define __NR_epoll_create1           4326
@@ -406,6 +406,8 @@
 #define __NR_fsconfig		4431
 #define __NR_fsmount		4432
 #define __NR_fspick		4433
+#define __NR_pidfd_open		4434
+#define __NR_clone3		4435
 
 #define SYS_syscall                 4000
 #define SYS_exit                    4001
@@ -485,8 +487,8 @@
 #define SYS_setrlimit               4075
 #define SYS_getrlimit               4076
 #define SYS_getrusage               4077
-#define SYS_gettimeofday            4078
-#define SYS_settimeofday            4079
+#define SYS_gettimeofday_time32            4078
+#define SYS_settimeofday_time32            4079
 #define SYS_getgroups               4080
 #define SYS_setgroups               4081
 #define SYS_reserved82              4082
@@ -665,14 +667,14 @@
 #define SYS_statfs64                4255
 #define SYS_fstatfs64               4256
 #define SYS_timer_create            4257
-#define SYS_timer_settime           4258
-#define SYS_timer_gettime           4259
+#define SYS_timer_settime32           4258
+#define SYS_timer_gettime32           4259
 #define SYS_timer_getoverrun        4260
 #define SYS_timer_delete            4261
-#define SYS_clock_settime           4262
-#define SYS_clock_gettime           4263
-#define SYS_clock_getres            4264
-#define SYS_clock_nanosleep         4265
+#define SYS_clock_settime32           4262
+#define SYS_clock_gettime32           4263
+#define SYS_clock_getres_time32            4264
+#define SYS_clock_nanosleep_time32         4265
 #define SYS_tgkill                  4266
 #define SYS_utimes                  4267
 #define SYS_mbind                   4268
@@ -728,8 +730,8 @@
 #define SYS_eventfd                 4319
 #define SYS_fallocate               4320
 #define SYS_timerfd_create          4321
-#define SYS_timerfd_gettime         4322
-#define SYS_timerfd_settime         4323
+#define SYS_timerfd_gettime32         4322
+#define SYS_timerfd_settime32         4323
 #define SYS_signalfd4               4324
 #define SYS_eventfd2                4325
 #define SYS_epoll_create1           4326
@@ -814,4 +816,6 @@
 #define SYS_fsopen		4430
 #define SYS_fsconfig		4431
 #define SYS_fsmount		4432
-#define SYS_fspick		4433
\ No newline at end of file
+#define SYS_fspick		4433
+#define SYS_pidfd_open		4434
+#define SYS_clone3		4435
\ No newline at end of file
diff --git a/lib/libc/include/mips64-linux-musl/bits/alltypes.h b/lib/libc/include/mips64-linux-musl/bits/alltypes.h
index 2078964487..9745553d16 100644
--- a/lib/libc/include/mips64-linux-musl/bits/alltypes.h
+++ b/lib/libc/include/mips64-linux-musl/bits/alltypes.h
@@ -2,16 +2,13 @@
 #define _Int64 long
 #define _Reg long
 
-#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
-typedef __builtin_va_list va_list;
-#define __DEFINED_va_list
-#endif
-
-#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
-typedef __builtin_va_list __isoc_va_list;
-#define __DEFINED___isoc_va_list
+#if _MIPSEL || __MIPSEL || __MIPSEL__
+#define __BYTE_ORDER 1234
+#else
+#define __BYTE_ORDER 4321
 #endif
 
+#define __LONG_MAX 0x7fffffffffffffffL
 
 #ifndef __cplusplus
 #if defined(__NEED_wchar_t) && !defined(__DEFINED_wchar_t)
@@ -38,57 +35,14 @@ typedef struct { long long __ll; long double __ld; } max_align_t;
 #endif
 
 
-#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
-typedef long time_t;
-#define __DEFINED_time_t
-#endif
-
-#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
-typedef long suseconds_t;
-#define __DEFINED_suseconds_t
-#endif
-
-
 #if defined(__NEED_nlink_t) && !defined(__DEFINED_nlink_t)
 typedef unsigned nlink_t;
 #define __DEFINED_nlink_t
 #endif
 
-
-#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
-typedef struct { union { int __i[14]; volatile int __vi[14]; unsigned long __s[7]; } __u; } pthread_attr_t;
-#define __DEFINED_pthread_attr_t
-#endif
-
-#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
-typedef struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } pthread_mutex_t;
-#define __DEFINED_pthread_mutex_t
-#endif
-
-#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
-typedef struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } mtx_t;
-#define __DEFINED_mtx_t
-#endif
-
-#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } pthread_cond_t;
-#define __DEFINED_pthread_cond_t
-#endif
-
-#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } cnd_t;
-#define __DEFINED_cnd_t
-#endif
-
-#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
-typedef struct { union { int __i[14]; volatile int __vi[14]; void *__p[7]; } __u; } pthread_rwlock_t;
-#define __DEFINED_pthread_rwlock_t
-#endif
-
-#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
-typedef struct { union { int __i[8]; volatile int __vi[8]; void *__p[4]; } __u; } pthread_barrier_t;
-#define __DEFINED_pthread_barrier_t
-#endif
+#define __LITTLE_ENDIAN 1234
+#define __BIG_ENDIAN 4321
+#define __USE_TIME_BITS64 1
 
 #if defined(__NEED_size_t) && !defined(__DEFINED_size_t)
 typedef unsigned _Addr size_t;
@@ -125,6 +79,16 @@ typedef _Reg register_t;
 #define __DEFINED_register_t
 #endif
 
+#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
+typedef _Int64 time_t;
+#define __DEFINED_time_t
+#endif
+
+#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
+typedef _Int64 suseconds_t;
+#define __DEFINED_suseconds_t
+#endif
+
 
 #if defined(__NEED_int8_t) && !defined(__DEFINED_int8_t)
 typedef signed char     int8_t;
@@ -260,7 +224,7 @@ struct timeval { time_t tv_sec; suseconds_t tv_usec; };
 #endif
 
 #if defined(__NEED_struct_timespec) && !defined(__DEFINED_struct_timespec)
-struct timespec { time_t tv_sec; long tv_nsec; };
+struct timespec { time_t tv_sec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER==4321); long tv_nsec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER!=4321); };
 #define __DEFINED_struct_timespec
 #endif
 
@@ -356,6 +320,17 @@ typedef struct _IO_FILE FILE;
 #endif
 
 
+#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
+typedef __builtin_va_list va_list;
+#define __DEFINED_va_list
+#endif
+
+#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
+typedef __builtin_va_list __isoc_va_list;
+#define __DEFINED___isoc_va_list
+#endif
+
+
 #if defined(__NEED_mbstate_t) && !defined(__DEFINED_mbstate_t)
 typedef struct __mbstate_t { unsigned __opaque1, __opaque2; } mbstate_t;
 #define __DEFINED_mbstate_t
@@ -391,6 +366,42 @@ typedef unsigned short sa_family_t;
 #endif
 
 
+#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
+typedef struct { union { int __i[sizeof(long)==8?14:9]; volatile int __vi[sizeof(long)==8?14:9]; unsigned long __s[sizeof(long)==8?7:9]; } __u; } pthread_attr_t;
+#define __DEFINED_pthread_attr_t
+#endif
+
+#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } pthread_mutex_t;
+#define __DEFINED_pthread_mutex_t
+#endif
+
+#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } mtx_t;
+#define __DEFINED_mtx_t
+#endif
+
+#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } pthread_cond_t;
+#define __DEFINED_pthread_cond_t
+#endif
+
+#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } cnd_t;
+#define __DEFINED_cnd_t
+#endif
+
+#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
+typedef struct { union { int __i[sizeof(long)==8?14:8]; volatile int __vi[sizeof(long)==8?14:8]; void *__p[sizeof(long)==8?7:8]; } __u; } pthread_rwlock_t;
+#define __DEFINED_pthread_rwlock_t
+#endif
+
+#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
+typedef struct { union { int __i[sizeof(long)==8?8:5]; volatile int __vi[sizeof(long)==8?8:5]; void *__p[sizeof(long)==8?4:5]; } __u; } pthread_barrier_t;
+#define __DEFINED_pthread_barrier_t
+#endif
+
+
 #undef _Addr
 #undef _Int64
 #undef _Reg
\ No newline at end of file
diff --git a/lib/libc/include/mips64-linux-musl/bits/endian.h b/lib/libc/include/mips64-linux-musl/bits/endian.h
deleted file mode 100644
index e888a1939f..0000000000
--- a/lib/libc/include/mips64-linux-musl/bits/endian.h
+++ /dev/null
@@ -1,5 +0,0 @@
-#if _MIPSEL || __MIPSEL || __MIPSEL__
-#define __BYTE_ORDER __LITTLE_ENDIAN
-#else
-#define __BYTE_ORDER __BIG_ENDIAN
-#endif
\ No newline at end of file
diff --git a/lib/libc/include/mips64-linux-musl/bits/limits.h b/lib/libc/include/mips64-linux-musl/bits/limits.h
deleted file mode 100644
index ac11a8d7bf..0000000000
--- a/lib/libc/include/mips64-linux-musl/bits/limits.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-#define LONG_BIT 64
-#endif
-
-#define LONG_MAX 0x7fffffffffffffffL
-#define LLONG_MAX 0x7fffffffffffffffLL
\ No newline at end of file
diff --git a/lib/libc/include/mips64-linux-musl/bits/socket.h b/lib/libc/include/mips64-linux-musl/bits/socket.h
index 87d555b12d..4207084528 100644
--- a/lib/libc/include/mips64-linux-musl/bits/socket.h
+++ b/lib/libc/include/mips64-linux-musl/bits/socket.h
@@ -1,37 +1,3 @@
-#include <endian.h>
-
-struct msghdr {
-	void *msg_name;
-	socklen_t msg_namelen;
-	struct iovec *msg_iov;
-#if __BYTE_ORDER == __BIG_ENDIAN
-	int __pad1, msg_iovlen;
-#else
-	int msg_iovlen, __pad1;
-#endif
-	void *msg_control;
-#if __BYTE_ORDER == __BIG_ENDIAN
-	int __pad2;
-	socklen_t msg_controllen;
-#else
-	socklen_t msg_controllen;
-	int __pad2;
-#endif
-	int msg_flags;
-};
-
-struct cmsghdr {
-#if __BYTE_ORDER == __BIG_ENDIAN
-	int __pad1;
-	socklen_t cmsg_len;
-#else
-	socklen_t cmsg_len;
-	int __pad1;
-#endif
-	int cmsg_level;
-	int cmsg_type;
-};
-
 #define SOCK_STREAM    2
 #define SOCK_DGRAM     1
 #define SOL_SOCKET     65535
diff --git a/lib/libc/include/mips64-linux-musl/bits/syscall.h b/lib/libc/include/mips64-linux-musl/bits/syscall.h
index e14881035b..b3d86fe1d8 100644
--- a/lib/libc/include/mips64-linux-musl/bits/syscall.h
+++ b/lib/libc/include/mips64-linux-musl/bits/syscall.h
@@ -336,6 +336,8 @@
 #define __NR_fsconfig		5431
 #define __NR_fsmount		5432
 #define __NR_fspick		5433
+#define __NR_pidfd_open		5434
+#define __NR_clone3		5435
 
 #define SYS_read			5000
 #define SYS_write			5001
@@ -674,4 +676,6 @@
 #define SYS_fsopen		5430
 #define SYS_fsconfig		5431
 #define SYS_fsmount		5432
-#define SYS_fspick		5433
\ No newline at end of file
+#define SYS_fspick		5433
+#define SYS_pidfd_open		5434
+#define SYS_clone3		5435
\ No newline at end of file
diff --git a/lib/libc/include/powerpc-linux-musl/bits/alltypes.h b/lib/libc/include/powerpc-linux-musl/bits/alltypes.h
index f94f3e2f44..f655b43e3d 100644
--- a/lib/libc/include/powerpc-linux-musl/bits/alltypes.h
+++ b/lib/libc/include/powerpc-linux-musl/bits/alltypes.h
@@ -1,17 +1,10 @@
+#define _REDIR_TIME64 1
 #define _Addr int
 #define _Int64 long long
 #define _Reg int
 
-#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
-typedef __builtin_va_list va_list;
-#define __DEFINED_va_list
-#endif
-
-#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
-typedef __builtin_va_list __isoc_va_list;
-#define __DEFINED___isoc_va_list
-#endif
-
+#define __BYTE_ORDER 4321
+#define __LONG_MAX 0x7fffffffL
 
 #ifndef __cplusplus
 #ifdef __WCHAR_TYPE__
@@ -45,52 +38,9 @@ typedef struct { long long __ll; long double __ld; } max_align_t;
 #define __DEFINED_max_align_t
 #endif
 
-
-#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
-typedef long time_t;
-#define __DEFINED_time_t
-#endif
-
-#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
-typedef long suseconds_t;
-#define __DEFINED_suseconds_t
-#endif
-
-
-#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
-typedef struct { union { int __i[9]; volatile int __vi[9]; unsigned __s[9]; } __u; } pthread_attr_t;
-#define __DEFINED_pthread_attr_t
-#endif
-
-#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
-typedef struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } pthread_mutex_t;
-#define __DEFINED_pthread_mutex_t
-#endif
-
-#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
-typedef struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } mtx_t;
-#define __DEFINED_mtx_t
-#endif
-
-#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } pthread_cond_t;
-#define __DEFINED_pthread_cond_t
-#endif
-
-#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } cnd_t;
-#define __DEFINED_cnd_t
-#endif
-
-#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
-typedef struct { union { int __i[8]; volatile int __vi[8]; void *__p[8]; } __u; } pthread_rwlock_t;
-#define __DEFINED_pthread_rwlock_t
-#endif
-
-#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
-typedef struct { union { int __i[5]; volatile int __vi[5]; void *__p[5]; } __u; } pthread_barrier_t;
-#define __DEFINED_pthread_barrier_t
-#endif
+#define __LITTLE_ENDIAN 1234
+#define __BIG_ENDIAN 4321
+#define __USE_TIME_BITS64 1
 
 #if defined(__NEED_size_t) && !defined(__DEFINED_size_t)
 typedef unsigned _Addr size_t;
@@ -127,6 +77,16 @@ typedef _Reg register_t;
 #define __DEFINED_register_t
 #endif
 
+#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
+typedef _Int64 time_t;
+#define __DEFINED_time_t
+#endif
+
+#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
+typedef _Int64 suseconds_t;
+#define __DEFINED_suseconds_t
+#endif
+
 
 #if defined(__NEED_int8_t) && !defined(__DEFINED_int8_t)
 typedef signed char     int8_t;
@@ -262,7 +222,7 @@ struct timeval { time_t tv_sec; suseconds_t tv_usec; };
 #endif
 
 #if defined(__NEED_struct_timespec) && !defined(__DEFINED_struct_timespec)
-struct timespec { time_t tv_sec; long tv_nsec; };
+struct timespec { time_t tv_sec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER==4321); long tv_nsec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER!=4321); };
 #define __DEFINED_struct_timespec
 #endif
 
@@ -358,6 +318,17 @@ typedef struct _IO_FILE FILE;
 #endif
 
 
+#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
+typedef __builtin_va_list va_list;
+#define __DEFINED_va_list
+#endif
+
+#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
+typedef __builtin_va_list __isoc_va_list;
+#define __DEFINED___isoc_va_list
+#endif
+
+
 #if defined(__NEED_mbstate_t) && !defined(__DEFINED_mbstate_t)
 typedef struct __mbstate_t { unsigned __opaque1, __opaque2; } mbstate_t;
 #define __DEFINED_mbstate_t
@@ -393,6 +364,42 @@ typedef unsigned short sa_family_t;
 #endif
 
 
+#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
+typedef struct { union { int __i[sizeof(long)==8?14:9]; volatile int __vi[sizeof(long)==8?14:9]; unsigned long __s[sizeof(long)==8?7:9]; } __u; } pthread_attr_t;
+#define __DEFINED_pthread_attr_t
+#endif
+
+#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } pthread_mutex_t;
+#define __DEFINED_pthread_mutex_t
+#endif
+
+#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } mtx_t;
+#define __DEFINED_mtx_t
+#endif
+
+#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } pthread_cond_t;
+#define __DEFINED_pthread_cond_t
+#endif
+
+#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } cnd_t;
+#define __DEFINED_cnd_t
+#endif
+
+#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
+typedef struct { union { int __i[sizeof(long)==8?14:8]; volatile int __vi[sizeof(long)==8?14:8]; void *__p[sizeof(long)==8?7:8]; } __u; } pthread_rwlock_t;
+#define __DEFINED_pthread_rwlock_t
+#endif
+
+#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
+typedef struct { union { int __i[sizeof(long)==8?8:5]; volatile int __vi[sizeof(long)==8?8:5]; void *__p[sizeof(long)==8?4:5]; } __u; } pthread_barrier_t;
+#define __DEFINED_pthread_barrier_t
+#endif
+
+
 #undef _Addr
 #undef _Int64
 #undef _Reg
\ No newline at end of file
diff --git a/lib/libc/include/powerpc-linux-musl/bits/endian.h b/lib/libc/include/powerpc-linux-musl/bits/endian.h
deleted file mode 100644
index ca2af1ed57..0000000000
--- a/lib/libc/include/powerpc-linux-musl/bits/endian.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#ifdef __BIG_ENDIAN__
-  #if __BIG_ENDIAN__
-    #define __BYTE_ORDER __BIG_ENDIAN
-  #endif
-#endif /* __BIG_ENDIAN__ */
-
-#ifdef __LITTLE_ENDIAN__
-  #if __LITTLE_ENDIAN__
-    #define __BYTE_ORDER __LITTLE_ENDIAN
-  #endif
-#endif /* __LITTLE_ENDIAN__ */
-
-#ifndef __BYTE_ORDER
-  #define __BYTE_ORDER __BIG_ENDIAN
-#endif
\ No newline at end of file
diff --git a/lib/libc/include/powerpc-linux-musl/bits/ioctl.h b/lib/libc/include/powerpc-linux-musl/bits/ioctl.h
index 98eff9a7d5..bce4b19320 100644
--- a/lib/libc/include/powerpc-linux-musl/bits/ioctl.h
+++ b/lib/libc/include/powerpc-linux-musl/bits/ioctl.h
@@ -116,5 +116,5 @@
 #define FIOGETOWN       0x8903
 #define SIOCGPGRP       0x8904
 #define SIOCATMARK      0x8905
-#define SIOCGSTAMP      0x8906
-#define SIOCGSTAMPNS    0x8907
\ No newline at end of file
+#define SIOCGSTAMP      _IOR(0x89, 6, char[16])
+#define SIOCGSTAMPNS    _IOR(0x89, 7, char[16])
\ No newline at end of file
diff --git a/lib/libc/include/powerpc-linux-musl/bits/ipcstat.h b/lib/libc/include/powerpc-linux-musl/bits/ipcstat.h
new file mode 100644
index 0000000000..d055f3e837
--- /dev/null
+++ b/lib/libc/include/powerpc-linux-musl/bits/ipcstat.h
@@ -0,0 +1 @@
+#define IPC_STAT 0x102
\ No newline at end of file
diff --git a/lib/libc/include/powerpc-linux-musl/bits/limits.h b/lib/libc/include/powerpc-linux-musl/bits/limits.h
deleted file mode 100644
index ba9c3aa003..0000000000
--- a/lib/libc/include/powerpc-linux-musl/bits/limits.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-#define LONG_BIT 32
-#endif
-
-#define LONG_MAX  0x7fffffffL
-#define LLONG_MAX  0x7fffffffffffffffLL
\ No newline at end of file
diff --git a/lib/libc/include/powerpc-linux-musl/bits/msg.h b/lib/libc/include/powerpc-linux-musl/bits/msg.h
index 1bbca229c7..9232e03800 100644
--- a/lib/libc/include/powerpc-linux-musl/bits/msg.h
+++ b/lib/libc/include/powerpc-linux-musl/bits/msg.h
@@ -1,15 +1,18 @@
 struct msqid_ds {
 	struct ipc_perm msg_perm;
-	int __unused1;
-	time_t msg_stime;
-	int __unused2;
-	time_t msg_rtime;
-	int __unused3;
-	time_t msg_ctime;
+	unsigned long __msg_stime_hi;
+	unsigned long __msg_stime_lo;
+	unsigned long __msg_rtime_hi;
+	unsigned long __msg_rtime_lo;
+	unsigned long __msg_ctime_hi;
+	unsigned long __msg_ctime_lo;
 	unsigned long msg_cbytes;
 	msgqnum_t msg_qnum;
 	msglen_t msg_qbytes;
 	pid_t msg_lspid;
 	pid_t msg_lrpid;
 	unsigned long __unused[2];
+	time_t msg_stime;
+	time_t msg_rtime;
+	time_t msg_ctime;
 };
\ No newline at end of file
diff --git a/lib/libc/include/powerpc-linux-musl/bits/sem.h b/lib/libc/include/powerpc-linux-musl/bits/sem.h
index fefd211aa9..715a0ac85c 100644
--- a/lib/libc/include/powerpc-linux-musl/bits/sem.h
+++ b/lib/libc/include/powerpc-linux-musl/bits/sem.h
@@ -1,10 +1,12 @@
 struct semid_ds {
 	struct ipc_perm sem_perm;
-	int __unused1;
-	time_t sem_otime;
-	int  __unused2;
-	time_t sem_ctime;
+	unsigned long __sem_otime_hi;
+	unsigned long __sem_otime_lo;
+	unsigned long __sem_ctime_hi;
+	unsigned long __sem_ctime_lo;
 	unsigned short __sem_nsems_pad, sem_nsems;
 	long __unused3;
 	long __unused4;
+	time_t sem_otime;
+	time_t sem_ctime;
 };
\ No newline at end of file
diff --git a/lib/libc/include/powerpc-linux-musl/bits/shm.h b/lib/libc/include/powerpc-linux-musl/bits/shm.h
index ef46d7f101..e45c2ab19a 100644
--- a/lib/libc/include/powerpc-linux-musl/bits/shm.h
+++ b/lib/libc/include/powerpc-linux-musl/bits/shm.h
@@ -2,19 +2,21 @@
 
 struct shmid_ds {
 	struct ipc_perm shm_perm;
-	int __unused1;
-	time_t shm_atime;
-	int __unused2;
-	time_t shm_dtime;
-	int __unused3;
-	time_t shm_ctime;
-	int __unused4;
+	unsigned long __shm_atime_hi;
+	unsigned long __shm_atime_lo;
+	unsigned long __shm_dtime_hi;
+	unsigned long __shm_dtime_lo;
+	unsigned long __shm_ctime_hi;
+	unsigned long __shm_ctime_lo;
 	size_t shm_segsz;
 	pid_t shm_cpid;
 	pid_t shm_lpid;
 	unsigned long shm_nattch;
 	unsigned long __pad1;
 	unsigned long __pad2;
+	time_t shm_atime;
+	time_t shm_dtime;
+	time_t shm_ctime;
 };
 
 struct shminfo {
diff --git a/lib/libc/include/powerpc-linux-musl/bits/signal.h b/lib/libc/include/powerpc-linux-musl/bits/signal.h
index 12e0001316..48051afb63 100644
--- a/lib/libc/include/powerpc-linux-musl/bits/signal.h
+++ b/lib/libc/include/powerpc-linux-musl/bits/signal.h
@@ -28,7 +28,7 @@ struct sigcontext {
 	int signal;
 	unsigned long handler;
 	unsigned long oldmask;
-	void *regs;
+	struct pt_regs *regs;
 };
 
 typedef struct {
diff --git a/lib/libc/include/powerpc-linux-musl/bits/socket.h b/lib/libc/include/powerpc-linux-musl/bits/socket.h
index ba5e2b50d2..4225b91779 100644
--- a/lib/libc/include/powerpc-linux-musl/bits/socket.h
+++ b/lib/libc/include/powerpc-linux-musl/bits/socket.h
@@ -1,19 +1,3 @@
-struct msghdr {
-	void *msg_name;
-	socklen_t msg_namelen;
-	struct iovec *msg_iov;
-	int msg_iovlen;
-	void *msg_control;
-	socklen_t msg_controllen;
-	int msg_flags;
-};
-
-struct cmsghdr {
-	socklen_t cmsg_len;
-	int cmsg_level;
-	int cmsg_type;
-};
-
 #define SO_DEBUG        1
 #define SO_REUSEADDR    2
 #define SO_TYPE         3
@@ -31,8 +15,6 @@ struct cmsghdr {
 #define SO_REUSEPORT    15
 #define SO_RCVLOWAT     16
 #define SO_SNDLOWAT     17
-#define SO_RCVTIMEO     18
-#define SO_SNDTIMEO     19
 #define SO_PASSCRED     20
 #define SO_PEERCRED     21
 #define SO_ACCEPTCONN   30
diff --git a/lib/libc/include/powerpc-linux-musl/bits/stat.h b/lib/libc/include/powerpc-linux-musl/bits/stat.h
index e5298772da..fa6d8dfdb8 100644
--- a/lib/libc/include/powerpc-linux-musl/bits/stat.h
+++ b/lib/libc/include/powerpc-linux-musl/bits/stat.h
@@ -13,8 +13,12 @@ struct stat {
 	off_t st_size;
 	blksize_t st_blksize;
 	blkcnt_t st_blocks;
+	struct {
+		long tv_sec;
+		long tv_nsec;
+	} __st_atim32, __st_mtim32, __st_ctim32;
+	unsigned __unused[2];
 	struct timespec st_atim;
 	struct timespec st_mtim;
 	struct timespec st_ctim;
-	unsigned __unused[2];
 };
\ No newline at end of file
diff --git a/lib/libc/include/powerpc-linux-musl/bits/syscall.h b/lib/libc/include/powerpc-linux-musl/bits/syscall.h
index 888868ad5c..ce2818352c 100644
--- a/lib/libc/include/powerpc-linux-musl/bits/syscall.h
+++ b/lib/libc/include/powerpc-linux-musl/bits/syscall.h
@@ -76,8 +76,8 @@
 #define __NR_setrlimit               75
 #define __NR_getrlimit               76
 #define __NR_getrusage               77
-#define __NR_gettimeofday            78
-#define __NR_settimeofday            79
+#define __NR_gettimeofday_time32            78
+#define __NR_settimeofday_time32            79
 #define __NR_getgroups               80
 #define __NR_setgroups               81
 #define __NR_select                  82
@@ -238,14 +238,14 @@
 #define __NR_epoll_wait             238
 #define __NR_remap_file_pages       239
 #define __NR_timer_create           240
-#define __NR_timer_settime          241
-#define __NR_timer_gettime          242
+#define __NR_timer_settime32          241
+#define __NR_timer_gettime32          242
 #define __NR_timer_getoverrun       243
 #define __NR_timer_delete           244
-#define __NR_clock_settime          245
-#define __NR_clock_gettime          246
-#define __NR_clock_getres           247
-#define __NR_clock_nanosleep        248
+#define __NR_clock_settime32          245
+#define __NR_clock_gettime32          246
+#define __NR_clock_getres_time32           247
+#define __NR_clock_nanosleep_time32        248
 #define __NR_swapcontext            249
 #define __NR_tgkill                 250
 #define __NR_utimes                 251
@@ -307,8 +307,8 @@
 #define __NR_sync_file_range2	308
 #define __NR_fallocate		309
 #define __NR_subpage_prot		310
-#define __NR_timerfd_settime	311
-#define __NR_timerfd_gettime	312
+#define __NR_timerfd_settime32	311
+#define __NR_timerfd_gettime32	312
 #define __NR_signalfd4		313
 #define __NR_eventfd2		314
 #define __NR_epoll_create1	315
@@ -413,6 +413,8 @@
 #define __NR_fsconfig		431
 #define __NR_fsmount		432
 #define __NR_fspick		433
+#define __NR_pidfd_open		434
+#define __NR_clone3		435
 
 #define SYS_restart_syscall          0
 #define SYS_exit                     1
@@ -492,8 +494,8 @@
 #define SYS_setrlimit               75
 #define SYS_getrlimit               76
 #define SYS_getrusage               77
-#define SYS_gettimeofday            78
-#define SYS_settimeofday            79
+#define SYS_gettimeofday_time32            78
+#define SYS_settimeofday_time32            79
 #define SYS_getgroups               80
 #define SYS_setgroups               81
 #define SYS_select                  82
@@ -654,14 +656,14 @@
 #define SYS_epoll_wait             238
 #define SYS_remap_file_pages       239
 #define SYS_timer_create           240
-#define SYS_timer_settime          241
-#define SYS_timer_gettime          242
+#define SYS_timer_settime32          241
+#define SYS_timer_gettime32          242
 #define SYS_timer_getoverrun       243
 #define SYS_timer_delete           244
-#define SYS_clock_settime          245
-#define SYS_clock_gettime          246
-#define SYS_clock_getres           247
-#define SYS_clock_nanosleep        248
+#define SYS_clock_settime32          245
+#define SYS_clock_gettime32          246
+#define SYS_clock_getres_time32           247
+#define SYS_clock_nanosleep_time32        248
 #define SYS_swapcontext            249
 #define SYS_tgkill                 250
 #define SYS_utimes                 251
@@ -723,8 +725,8 @@
 #define SYS_sync_file_range2	308
 #define SYS_fallocate		309
 #define SYS_subpage_prot		310
-#define SYS_timerfd_settime	311
-#define SYS_timerfd_gettime	312
+#define SYS_timerfd_settime32	311
+#define SYS_timerfd_gettime32	312
 #define SYS_signalfd4		313
 #define SYS_eventfd2		314
 #define SYS_epoll_create1	315
@@ -828,4 +830,6 @@
 #define SYS_fsopen		430
 #define SYS_fsconfig		431
 #define SYS_fsmount		432
-#define SYS_fspick		433
\ No newline at end of file
+#define SYS_fspick		433
+#define SYS_pidfd_open		434
+#define SYS_clone3		435
\ No newline at end of file
diff --git a/lib/libc/include/powerpc64-linux-musl/bits/alltypes.h b/lib/libc/include/powerpc64-linux-musl/bits/alltypes.h
index b650fe8f9a..6177874ffa 100644
--- a/lib/libc/include/powerpc64-linux-musl/bits/alltypes.h
+++ b/lib/libc/include/powerpc64-linux-musl/bits/alltypes.h
@@ -2,16 +2,13 @@
 #define _Int64 long
 #define _Reg long
 
-#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
-typedef __builtin_va_list va_list;
-#define __DEFINED_va_list
-#endif
-
-#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
-typedef __builtin_va_list __isoc_va_list;
-#define __DEFINED___isoc_va_list
+#if __BIG_ENDIAN__
+#define __BYTE_ORDER 4321
+#else
+#define __BYTE_ORDER 1234
 #endif
 
+#define __LONG_MAX 0x7fffffffffffffffL
 
 #ifndef __cplusplus
 #if defined(__NEED_wchar_t) && !defined(__DEFINED_wchar_t)
@@ -37,52 +34,9 @@ typedef struct { long long __ll; long double __ld; } max_align_t;
 #define __DEFINED_max_align_t
 #endif
 
-
-#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
-typedef long time_t;
-#define __DEFINED_time_t
-#endif
-
-#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
-typedef long suseconds_t;
-#define __DEFINED_suseconds_t
-#endif
-
-
-#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
-typedef struct { union { int __i[14]; volatile int __vi[14]; unsigned long __s[7]; } __u; } pthread_attr_t;
-#define __DEFINED_pthread_attr_t
-#endif
-
-#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
-typedef struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } pthread_mutex_t;
-#define __DEFINED_pthread_mutex_t
-#endif
-
-#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
-typedef struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } mtx_t;
-#define __DEFINED_mtx_t
-#endif
-
-#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } pthread_cond_t;
-#define __DEFINED_pthread_cond_t
-#endif
-
-#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } cnd_t;
-#define __DEFINED_cnd_t
-#endif
-
-#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
-typedef struct { union { int __i[14]; volatile int __vi[14]; void *__p[7]; } __u; } pthread_rwlock_t;
-#define __DEFINED_pthread_rwlock_t
-#endif
-
-#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
-typedef struct { union { int __i[8]; volatile int __vi[8]; void *__p[4]; } __u; } pthread_barrier_t;
-#define __DEFINED_pthread_barrier_t
-#endif
+#define __LITTLE_ENDIAN 1234
+#define __BIG_ENDIAN 4321
+#define __USE_TIME_BITS64 1
 
 #if defined(__NEED_size_t) && !defined(__DEFINED_size_t)
 typedef unsigned _Addr size_t;
@@ -119,6 +73,16 @@ typedef _Reg register_t;
 #define __DEFINED_register_t
 #endif
 
+#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
+typedef _Int64 time_t;
+#define __DEFINED_time_t
+#endif
+
+#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
+typedef _Int64 suseconds_t;
+#define __DEFINED_suseconds_t
+#endif
+
 
 #if defined(__NEED_int8_t) && !defined(__DEFINED_int8_t)
 typedef signed char     int8_t;
@@ -254,7 +218,7 @@ struct timeval { time_t tv_sec; suseconds_t tv_usec; };
 #endif
 
 #if defined(__NEED_struct_timespec) && !defined(__DEFINED_struct_timespec)
-struct timespec { time_t tv_sec; long tv_nsec; };
+struct timespec { time_t tv_sec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER==4321); long tv_nsec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER!=4321); };
 #define __DEFINED_struct_timespec
 #endif
 
@@ -350,6 +314,17 @@ typedef struct _IO_FILE FILE;
 #endif
 
 
+#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
+typedef __builtin_va_list va_list;
+#define __DEFINED_va_list
+#endif
+
+#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
+typedef __builtin_va_list __isoc_va_list;
+#define __DEFINED___isoc_va_list
+#endif
+
+
 #if defined(__NEED_mbstate_t) && !defined(__DEFINED_mbstate_t)
 typedef struct __mbstate_t { unsigned __opaque1, __opaque2; } mbstate_t;
 #define __DEFINED_mbstate_t
@@ -385,6 +360,42 @@ typedef unsigned short sa_family_t;
 #endif
 
 
+#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
+typedef struct { union { int __i[sizeof(long)==8?14:9]; volatile int __vi[sizeof(long)==8?14:9]; unsigned long __s[sizeof(long)==8?7:9]; } __u; } pthread_attr_t;
+#define __DEFINED_pthread_attr_t
+#endif
+
+#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } pthread_mutex_t;
+#define __DEFINED_pthread_mutex_t
+#endif
+
+#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } mtx_t;
+#define __DEFINED_mtx_t
+#endif
+
+#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } pthread_cond_t;
+#define __DEFINED_pthread_cond_t
+#endif
+
+#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } cnd_t;
+#define __DEFINED_cnd_t
+#endif
+
+#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
+typedef struct { union { int __i[sizeof(long)==8?14:8]; volatile int __vi[sizeof(long)==8?14:8]; void *__p[sizeof(long)==8?7:8]; } __u; } pthread_rwlock_t;
+#define __DEFINED_pthread_rwlock_t
+#endif
+
+#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
+typedef struct { union { int __i[sizeof(long)==8?8:5]; volatile int __vi[sizeof(long)==8?8:5]; void *__p[sizeof(long)==8?4:5]; } __u; } pthread_barrier_t;
+#define __DEFINED_pthread_barrier_t
+#endif
+
+
 #undef _Addr
 #undef _Int64
 #undef _Reg
\ No newline at end of file
diff --git a/lib/libc/include/powerpc64-linux-musl/bits/endian.h b/lib/libc/include/powerpc64-linux-musl/bits/endian.h
deleted file mode 100644
index 4f3a41f0c1..0000000000
--- a/lib/libc/include/powerpc64-linux-musl/bits/endian.h
+++ /dev/null
@@ -1,5 +0,0 @@
-#if __BIG_ENDIAN__
-#define __BYTE_ORDER __BIG_ENDIAN
-#else
-#define __BYTE_ORDER __LITTLE_ENDIAN
-#endif
\ No newline at end of file
diff --git a/lib/libc/include/powerpc64-linux-musl/bits/signal.h b/lib/libc/include/powerpc64-linux-musl/bits/signal.h
index c312b0d459..de82cf9ec7 100644
--- a/lib/libc/include/powerpc64-linux-musl/bits/signal.h
+++ b/lib/libc/include/powerpc64-linux-musl/bits/signal.h
@@ -9,11 +9,7 @@
 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
 
 typedef unsigned long greg_t, gregset_t[48];
-
-typedef struct {
-	double fpregs[32];
-	double fpscr;
-} fpregset_t;
+typedef double fpregset_t[33];
 
 typedef struct {
 #ifdef __GNUC__
@@ -36,7 +32,7 @@ typedef struct sigcontext {
 	int _pad0;
 	unsigned long handler;
 	unsigned long oldmask;
-	void *regs;
+	struct pt_regs *regs;
 	gregset_t gp_regs;
 	fpregset_t fp_regs;
 	vrregset_t *v_regs;
diff --git a/lib/libc/include/powerpc64-linux-musl/bits/socket.h b/lib/libc/include/powerpc64-linux-musl/bits/socket.h
index d453d65ce4..1fa551d93e 100644
--- a/lib/libc/include/powerpc64-linux-musl/bits/socket.h
+++ b/lib/libc/include/powerpc64-linux-musl/bits/socket.h
@@ -1,37 +1,3 @@
-#include <endian.h>
-
-struct msghdr {
-	void *msg_name;
-	socklen_t msg_namelen;
-	struct iovec *msg_iov;
-#if __BYTE_ORDER == __BIG_ENDIAN
-	int __pad1, msg_iovlen;
-#else
-	int msg_iovlen, __pad1;
-#endif
-	void *msg_control;
-#if __BYTE_ORDER == __BIG_ENDIAN
-	int __pad2;
-	socklen_t msg_controllen;
-#else
-	socklen_t msg_controllen;
-	int __pad2;
-#endif
-	int msg_flags;
-};
-
-struct cmsghdr {
-#if __BYTE_ORDER == __BIG_ENDIAN
-	int __pad1;
-	socklen_t cmsg_len;
-#else
-	socklen_t cmsg_len;
-	int __pad1;
-#endif
-	int cmsg_level;
-	int cmsg_type;
-};
-
 #define SO_DEBUG        1
 #define SO_REUSEADDR    2
 #define SO_TYPE         3
diff --git a/lib/libc/include/powerpc64-linux-musl/bits/syscall.h b/lib/libc/include/powerpc64-linux-musl/bits/syscall.h
index 38b8263144..4592aac64d 100644
--- a/lib/libc/include/powerpc64-linux-musl/bits/syscall.h
+++ b/lib/libc/include/powerpc64-linux-musl/bits/syscall.h
@@ -385,6 +385,8 @@
 #define __NR_fsconfig		431
 #define __NR_fsmount		432
 #define __NR_fspick		433
+#define __NR_pidfd_open		434
+#define __NR_clone3		435
 
 #define SYS_restart_syscall          0
 #define SYS_exit                     1
@@ -772,4 +774,6 @@
 #define SYS_fsopen		430
 #define SYS_fsconfig		431
 #define SYS_fsmount		432
-#define SYS_fspick		433
\ No newline at end of file
+#define SYS_fspick		433
+#define SYS_pidfd_open		434
+#define SYS_clone3		435
\ No newline at end of file
diff --git a/lib/libc/include/riscv64-linux-musl/bits/alltypes.h b/lib/libc/include/riscv64-linux-musl/bits/alltypes.h
index c326d32774..8db53c8293 100644
--- a/lib/libc/include/riscv64-linux-musl/bits/alltypes.h
+++ b/lib/libc/include/riscv64-linux-musl/bits/alltypes.h
@@ -2,16 +2,8 @@
 #define _Int64 long
 #define _Reg long
 
-#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
-typedef __builtin_va_list va_list;
-#define __DEFINED_va_list
-#endif
-
-#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
-typedef __builtin_va_list __isoc_va_list;
-#define __DEFINED___isoc_va_list
-#endif
-
+#define __BYTE_ORDER 1234
+#define __LONG_MAX 0x7fffffffffffffffL
 
 #ifndef __cplusplus
 #if defined(__NEED_wchar_t) && !defined(__DEFINED_wchar_t)
@@ -48,52 +40,9 @@ typedef struct { long long __ll; long double __ld; } max_align_t;
 #define __DEFINED_max_align_t
 #endif
 
-
-#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
-typedef long time_t;
-#define __DEFINED_time_t
-#endif
-
-#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
-typedef long suseconds_t;
-#define __DEFINED_suseconds_t
-#endif
-
-
-#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
-typedef struct { union { int __i[14]; volatile int __vi[14]; unsigned long __s[7]; } __u; } pthread_attr_t;
-#define __DEFINED_pthread_attr_t
-#endif
-
-#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
-typedef struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } pthread_mutex_t;
-#define __DEFINED_pthread_mutex_t
-#endif
-
-#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
-typedef struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } mtx_t;
-#define __DEFINED_mtx_t
-#endif
-
-#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } pthread_cond_t;
-#define __DEFINED_pthread_cond_t
-#endif
-
-#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } cnd_t;
-#define __DEFINED_cnd_t
-#endif
-
-#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
-typedef struct { union { int __i[14]; volatile int __vi[14]; void *__p[7]; } __u; } pthread_rwlock_t;
-#define __DEFINED_pthread_rwlock_t
-#endif
-
-#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
-typedef struct { union { int __i[8]; volatile int __vi[8]; void *__p[4]; } __u; } pthread_barrier_t;
-#define __DEFINED_pthread_barrier_t
-#endif
+#define __LITTLE_ENDIAN 1234
+#define __BIG_ENDIAN 4321
+#define __USE_TIME_BITS64 1
 
 #if defined(__NEED_size_t) && !defined(__DEFINED_size_t)
 typedef unsigned _Addr size_t;
@@ -130,6 +79,16 @@ typedef _Reg register_t;
 #define __DEFINED_register_t
 #endif
 
+#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
+typedef _Int64 time_t;
+#define __DEFINED_time_t
+#endif
+
+#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
+typedef _Int64 suseconds_t;
+#define __DEFINED_suseconds_t
+#endif
+
 
 #if defined(__NEED_int8_t) && !defined(__DEFINED_int8_t)
 typedef signed char     int8_t;
@@ -265,7 +224,7 @@ struct timeval { time_t tv_sec; suseconds_t tv_usec; };
 #endif
 
 #if defined(__NEED_struct_timespec) && !defined(__DEFINED_struct_timespec)
-struct timespec { time_t tv_sec; long tv_nsec; };
+struct timespec { time_t tv_sec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER==4321); long tv_nsec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER!=4321); };
 #define __DEFINED_struct_timespec
 #endif
 
@@ -361,6 +320,17 @@ typedef struct _IO_FILE FILE;
 #endif
 
 
+#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
+typedef __builtin_va_list va_list;
+#define __DEFINED_va_list
+#endif
+
+#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
+typedef __builtin_va_list __isoc_va_list;
+#define __DEFINED___isoc_va_list
+#endif
+
+
 #if defined(__NEED_mbstate_t) && !defined(__DEFINED_mbstate_t)
 typedef struct __mbstate_t { unsigned __opaque1, __opaque2; } mbstate_t;
 #define __DEFINED_mbstate_t
@@ -396,6 +366,42 @@ typedef unsigned short sa_family_t;
 #endif
 
 
+#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
+typedef struct { union { int __i[sizeof(long)==8?14:9]; volatile int __vi[sizeof(long)==8?14:9]; unsigned long __s[sizeof(long)==8?7:9]; } __u; } pthread_attr_t;
+#define __DEFINED_pthread_attr_t
+#endif
+
+#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } pthread_mutex_t;
+#define __DEFINED_pthread_mutex_t
+#endif
+
+#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } mtx_t;
+#define __DEFINED_mtx_t
+#endif
+
+#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } pthread_cond_t;
+#define __DEFINED_pthread_cond_t
+#endif
+
+#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } cnd_t;
+#define __DEFINED_cnd_t
+#endif
+
+#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
+typedef struct { union { int __i[sizeof(long)==8?14:8]; volatile int __vi[sizeof(long)==8?14:8]; void *__p[sizeof(long)==8?7:8]; } __u; } pthread_rwlock_t;
+#define __DEFINED_pthread_rwlock_t
+#endif
+
+#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
+typedef struct { union { int __i[sizeof(long)==8?8:5]; volatile int __vi[sizeof(long)==8?8:5]; void *__p[sizeof(long)==8?4:5]; } __u; } pthread_barrier_t;
+#define __DEFINED_pthread_barrier_t
+#endif
+
+
 #undef _Addr
 #undef _Int64
 #undef _Reg
\ No newline at end of file
diff --git a/lib/libc/include/riscv64-linux-musl/bits/reg.h b/lib/libc/include/riscv64-linux-musl/bits/reg.h
deleted file mode 100644
index b449472ae9..0000000000
--- a/lib/libc/include/riscv64-linux-musl/bits/reg.h
+++ /dev/null
@@ -1,8 +0,0 @@
-#undef __WORDSIZE
-#define __WORDSIZE 64
-#define REG_PC 0
-#define REG_RA 1
-#define REG_SP 2
-#define REG_TP 4
-#define REG_S0 8
-#define REG_A0 10
\ No newline at end of file
diff --git a/lib/libc/include/riscv64-linux-musl/bits/signal.h b/lib/libc/include/riscv64-linux-musl/bits/signal.h
index 5eddfd18bc..87ae2ee7d1 100644
--- a/lib/libc/include/riscv64-linux-musl/bits/signal.h
+++ b/lib/libc/include/riscv64-linux-musl/bits/signal.h
@@ -35,6 +35,15 @@ typedef struct mcontext_t {
 	union __riscv_mc_fp_state __fpregs;
 } mcontext_t;
 
+#if defined(_GNU_SOURCE)
+#define REG_PC 0
+#define REG_RA 1
+#define REG_SP 2
+#define REG_TP 4
+#define REG_S0 8
+#define REG_A0 10
+#endif
+
 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
 typedef unsigned long greg_t;
 typedef unsigned long gregset_t[32];
diff --git a/lib/libc/include/riscv64-linux-musl/bits/socket.h b/lib/libc/include/riscv64-linux-musl/bits/socket.h
deleted file mode 100644
index dfedbe836f..0000000000
--- a/lib/libc/include/riscv64-linux-musl/bits/socket.h
+++ /dev/null
@@ -1,19 +0,0 @@
-#include <endian.h>
-
-struct msghdr {
-	void *msg_name;
-	socklen_t msg_namelen;
-	struct iovec *msg_iov;
-	int msg_iovlen, __pad1;
-	void *msg_control;
-	socklen_t msg_controllen;
-	int __pad2;
-	int msg_flags;
-};
-
-struct cmsghdr {
-	socklen_t cmsg_len;
-	int __pad1;
-	int cmsg_level;
-	int cmsg_type;
-};
\ No newline at end of file
diff --git a/lib/libc/include/riscv64-linux-musl/bits/syscall.h b/lib/libc/include/riscv64-linux-musl/bits/syscall.h
index 423de02ab1..808207fb4b 100644
--- a/lib/libc/include/riscv64-linux-musl/bits/syscall.h
+++ b/lib/libc/include/riscv64-linux-musl/bits/syscall.h
@@ -287,6 +287,8 @@
 #define __NR_fsconfig		431
 #define __NR_fsmount		432
 #define __NR_fspick		433
+#define __NR_pidfd_open		434
+#define __NR_clone3		435
 
 #define __NR_sysriscv __NR_arch_specific_syscall
 #define __NR_riscv_flush_icache (__NR_sysriscv + 15)
@@ -579,5 +581,7 @@
 #define SYS_fsconfig		431
 #define SYS_fsmount		432
 #define SYS_fspick		433
+#define SYS_pidfd_open		434
+#define SYS_clone3		435
 #define SYS_sysriscv __NR_arch_specific_syscall
 #define SYS_riscv_flush_icache (__NR_sysriscv + 15)
\ No newline at end of file
diff --git a/lib/libc/include/s390x-linux-musl/bits/alltypes.h b/lib/libc/include/s390x-linux-musl/bits/alltypes.h
index e831219e08..55dbfa500c 100644
--- a/lib/libc/include/s390x-linux-musl/bits/alltypes.h
+++ b/lib/libc/include/s390x-linux-musl/bits/alltypes.h
@@ -2,16 +2,8 @@
 #define _Int64 long
 #define _Reg long
 
-#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
-typedef __builtin_va_list va_list;
-#define __DEFINED_va_list
-#endif
-
-#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
-typedef __builtin_va_list __isoc_va_list;
-#define __DEFINED___isoc_va_list
-#endif
-
+#define __BYTE_ORDER 4321
+#define __LONG_MAX 0x7fffffffffffffffL
 
 #ifndef __cplusplus
 #if defined(__NEED_wchar_t) && !defined(__DEFINED_wchar_t)
@@ -37,52 +29,9 @@ typedef struct { long long __ll; long double __ld; } max_align_t;
 #define __DEFINED_max_align_t
 #endif
 
-
-#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
-typedef long time_t;
-#define __DEFINED_time_t
-#endif
-
-#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
-typedef long suseconds_t;
-#define __DEFINED_suseconds_t
-#endif
-
-
-#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
-typedef struct { union { int __i[14]; volatile int __vi[14]; unsigned long __s[7]; } __u; } pthread_attr_t;
-#define __DEFINED_pthread_attr_t
-#endif
-
-#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
-typedef struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } pthread_mutex_t;
-#define __DEFINED_pthread_mutex_t
-#endif
-
-#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
-typedef struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } mtx_t;
-#define __DEFINED_mtx_t
-#endif
-
-#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } pthread_cond_t;
-#define __DEFINED_pthread_cond_t
-#endif
-
-#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } cnd_t;
-#define __DEFINED_cnd_t
-#endif
-
-#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
-typedef struct { union { int __i[14]; volatile int __vi[14]; void *__p[7]; } __u; } pthread_rwlock_t;
-#define __DEFINED_pthread_rwlock_t
-#endif
-
-#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
-typedef struct { union { int __i[8]; volatile int __vi[8]; void *__p[4]; } __u; } pthread_barrier_t;
-#define __DEFINED_pthread_barrier_t
-#endif
+#define __LITTLE_ENDIAN 1234
+#define __BIG_ENDIAN 4321
+#define __USE_TIME_BITS64 1
 
 #if defined(__NEED_size_t) && !defined(__DEFINED_size_t)
 typedef unsigned _Addr size_t;
@@ -119,6 +68,16 @@ typedef _Reg register_t;
 #define __DEFINED_register_t
 #endif
 
+#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
+typedef _Int64 time_t;
+#define __DEFINED_time_t
+#endif
+
+#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
+typedef _Int64 suseconds_t;
+#define __DEFINED_suseconds_t
+#endif
+
 
 #if defined(__NEED_int8_t) && !defined(__DEFINED_int8_t)
 typedef signed char     int8_t;
@@ -254,7 +213,7 @@ struct timeval { time_t tv_sec; suseconds_t tv_usec; };
 #endif
 
 #if defined(__NEED_struct_timespec) && !defined(__DEFINED_struct_timespec)
-struct timespec { time_t tv_sec; long tv_nsec; };
+struct timespec { time_t tv_sec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER==4321); long tv_nsec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER!=4321); };
 #define __DEFINED_struct_timespec
 #endif
 
@@ -350,6 +309,17 @@ typedef struct _IO_FILE FILE;
 #endif
 
 
+#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
+typedef __builtin_va_list va_list;
+#define __DEFINED_va_list
+#endif
+
+#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
+typedef __builtin_va_list __isoc_va_list;
+#define __DEFINED___isoc_va_list
+#endif
+
+
 #if defined(__NEED_mbstate_t) && !defined(__DEFINED_mbstate_t)
 typedef struct __mbstate_t { unsigned __opaque1, __opaque2; } mbstate_t;
 #define __DEFINED_mbstate_t
@@ -385,6 +355,42 @@ typedef unsigned short sa_family_t;
 #endif
 
 
+#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
+typedef struct { union { int __i[sizeof(long)==8?14:9]; volatile int __vi[sizeof(long)==8?14:9]; unsigned long __s[sizeof(long)==8?7:9]; } __u; } pthread_attr_t;
+#define __DEFINED_pthread_attr_t
+#endif
+
+#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } pthread_mutex_t;
+#define __DEFINED_pthread_mutex_t
+#endif
+
+#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } mtx_t;
+#define __DEFINED_mtx_t
+#endif
+
+#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } pthread_cond_t;
+#define __DEFINED_pthread_cond_t
+#endif
+
+#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } cnd_t;
+#define __DEFINED_cnd_t
+#endif
+
+#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
+typedef struct { union { int __i[sizeof(long)==8?14:8]; volatile int __vi[sizeof(long)==8?14:8]; void *__p[sizeof(long)==8?7:8]; } __u; } pthread_rwlock_t;
+#define __DEFINED_pthread_rwlock_t
+#endif
+
+#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
+typedef struct { union { int __i[sizeof(long)==8?8:5]; volatile int __vi[sizeof(long)==8?8:5]; void *__p[sizeof(long)==8?4:5]; } __u; } pthread_barrier_t;
+#define __DEFINED_pthread_barrier_t
+#endif
+
+
 #undef _Addr
 #undef _Int64
 #undef _Reg
\ No newline at end of file
diff --git a/lib/libc/include/s390x-linux-musl/bits/endian.h b/lib/libc/include/s390x-linux-musl/bits/endian.h
deleted file mode 100644
index 19063e7423..0000000000
--- a/lib/libc/include/s390x-linux-musl/bits/endian.h
+++ /dev/null
@@ -1 +0,0 @@
-#define __BYTE_ORDER __BIG_ENDIAN
\ No newline at end of file
diff --git a/lib/libc/include/s390x-linux-musl/bits/limits.h b/lib/libc/include/s390x-linux-musl/bits/limits.h
index e984295854..fc11433d98 100644
--- a/lib/libc/include/s390x-linux-musl/bits/limits.h
+++ b/lib/libc/include/s390x-linux-musl/bits/limits.h
@@ -1,8 +1 @@
-#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-#define PAGESIZE 4096
-#define LONG_BIT 64
-#endif
-
-#define LONG_MAX  0x7fffffffffffffffL
-#define LLONG_MAX  0x7fffffffffffffffLL
\ No newline at end of file
+#define PAGESIZE 4096
\ No newline at end of file
diff --git a/lib/libc/include/s390x-linux-musl/bits/socket.h b/lib/libc/include/s390x-linux-musl/bits/socket.h
deleted file mode 100644
index decce20733..0000000000
--- a/lib/libc/include/s390x-linux-musl/bits/socket.h
+++ /dev/null
@@ -1,17 +0,0 @@
-struct msghdr {
-	void *msg_name;
-	socklen_t msg_namelen;
-	struct iovec *msg_iov;
-	int __pad1, msg_iovlen;
-	void *msg_control;
-	int __pad2;
-	socklen_t msg_controllen;
-	int msg_flags;
-};
-
-struct cmsghdr {
-	int __pad1;
-	socklen_t cmsg_len;
-	int cmsg_level;
-	int cmsg_type;
-};
\ No newline at end of file
diff --git a/lib/libc/include/s390x-linux-musl/bits/syscall.h b/lib/libc/include/s390x-linux-musl/bits/syscall.h
index e2436d95c8..790f513736 100644
--- a/lib/libc/include/s390x-linux-musl/bits/syscall.h
+++ b/lib/libc/include/s390x-linux-musl/bits/syscall.h
@@ -350,6 +350,8 @@
 #define __NR_fsconfig		431
 #define __NR_fsmount		432
 #define __NR_fspick		433
+#define __NR_pidfd_open		434
+#define __NR_clone3		435
 
 #define SYS_exit                         1
 #define SYS_fork                         2
@@ -702,4 +704,6 @@
 #define SYS_fsopen		430
 #define SYS_fsconfig		431
 #define SYS_fsmount		432
-#define SYS_fspick		433
\ No newline at end of file
+#define SYS_fspick		433
+#define SYS_pidfd_open		434
+#define SYS_clone3		435
\ No newline at end of file
diff --git a/lib/libc/include/x86_64-linux-musl/bits/alltypes.h b/lib/libc/include/x86_64-linux-musl/bits/alltypes.h
index ec6a904f58..7418a48234 100644
--- a/lib/libc/include/x86_64-linux-musl/bits/alltypes.h
+++ b/lib/libc/include/x86_64-linux-musl/bits/alltypes.h
@@ -2,16 +2,8 @@
 #define _Int64 long
 #define _Reg long
 
-#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
-typedef __builtin_va_list va_list;
-#define __DEFINED_va_list
-#endif
-
-#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
-typedef __builtin_va_list __isoc_va_list;
-#define __DEFINED___isoc_va_list
-#endif
-
+#define __BYTE_ORDER 1234
+#define __LONG_MAX 0x7fffffffffffffffL
 
 #ifndef __cplusplus
 #if defined(__NEED_wchar_t) && !defined(__DEFINED_wchar_t)
@@ -50,52 +42,9 @@ typedef struct { long long __ll; long double __ld; } max_align_t;
 #define __DEFINED_max_align_t
 #endif
 
-
-#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
-typedef long time_t;
-#define __DEFINED_time_t
-#endif
-
-#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
-typedef long suseconds_t;
-#define __DEFINED_suseconds_t
-#endif
-
-
-#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
-typedef struct { union { int __i[14]; volatile int __vi[14]; unsigned long __s[7]; } __u; } pthread_attr_t;
-#define __DEFINED_pthread_attr_t
-#endif
-
-#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
-typedef struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } pthread_mutex_t;
-#define __DEFINED_pthread_mutex_t
-#endif
-
-#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
-typedef struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } mtx_t;
-#define __DEFINED_mtx_t
-#endif
-
-#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } pthread_cond_t;
-#define __DEFINED_pthread_cond_t
-#endif
-
-#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
-typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } cnd_t;
-#define __DEFINED_cnd_t
-#endif
-
-#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
-typedef struct { union { int __i[14]; volatile int __vi[14]; void *__p[7]; } __u; } pthread_rwlock_t;
-#define __DEFINED_pthread_rwlock_t
-#endif
-
-#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
-typedef struct { union { int __i[8]; volatile int __vi[8]; void *__p[4]; } __u; } pthread_barrier_t;
-#define __DEFINED_pthread_barrier_t
-#endif
+#define __LITTLE_ENDIAN 1234
+#define __BIG_ENDIAN 4321
+#define __USE_TIME_BITS64 1
 
 #if defined(__NEED_size_t) && !defined(__DEFINED_size_t)
 typedef unsigned _Addr size_t;
@@ -132,6 +81,16 @@ typedef _Reg register_t;
 #define __DEFINED_register_t
 #endif
 
+#if defined(__NEED_time_t) && !defined(__DEFINED_time_t)
+typedef _Int64 time_t;
+#define __DEFINED_time_t
+#endif
+
+#if defined(__NEED_suseconds_t) && !defined(__DEFINED_suseconds_t)
+typedef _Int64 suseconds_t;
+#define __DEFINED_suseconds_t
+#endif
+
 
 #if defined(__NEED_int8_t) && !defined(__DEFINED_int8_t)
 typedef signed char     int8_t;
@@ -267,7 +226,7 @@ struct timeval { time_t tv_sec; suseconds_t tv_usec; };
 #endif
 
 #if defined(__NEED_struct_timespec) && !defined(__DEFINED_struct_timespec)
-struct timespec { time_t tv_sec; long tv_nsec; };
+struct timespec { time_t tv_sec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER==4321); long tv_nsec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER!=4321); };
 #define __DEFINED_struct_timespec
 #endif
 
@@ -363,6 +322,17 @@ typedef struct _IO_FILE FILE;
 #endif
 
 
+#if defined(__NEED_va_list) && !defined(__DEFINED_va_list)
+typedef __builtin_va_list va_list;
+#define __DEFINED_va_list
+#endif
+
+#if defined(__NEED___isoc_va_list) && !defined(__DEFINED___isoc_va_list)
+typedef __builtin_va_list __isoc_va_list;
+#define __DEFINED___isoc_va_list
+#endif
+
+
 #if defined(__NEED_mbstate_t) && !defined(__DEFINED_mbstate_t)
 typedef struct __mbstate_t { unsigned __opaque1, __opaque2; } mbstate_t;
 #define __DEFINED_mbstate_t
@@ -398,6 +368,42 @@ typedef unsigned short sa_family_t;
 #endif
 
 
+#if defined(__NEED_pthread_attr_t) && !defined(__DEFINED_pthread_attr_t)
+typedef struct { union { int __i[sizeof(long)==8?14:9]; volatile int __vi[sizeof(long)==8?14:9]; unsigned long __s[sizeof(long)==8?7:9]; } __u; } pthread_attr_t;
+#define __DEFINED_pthread_attr_t
+#endif
+
+#if defined(__NEED_pthread_mutex_t) && !defined(__DEFINED_pthread_mutex_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } pthread_mutex_t;
+#define __DEFINED_pthread_mutex_t
+#endif
+
+#if defined(__NEED_mtx_t) && !defined(__DEFINED_mtx_t)
+typedef struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } mtx_t;
+#define __DEFINED_mtx_t
+#endif
+
+#if defined(__NEED_pthread_cond_t) && !defined(__DEFINED_pthread_cond_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } pthread_cond_t;
+#define __DEFINED_pthread_cond_t
+#endif
+
+#if defined(__NEED_cnd_t) && !defined(__DEFINED_cnd_t)
+typedef struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } cnd_t;
+#define __DEFINED_cnd_t
+#endif
+
+#if defined(__NEED_pthread_rwlock_t) && !defined(__DEFINED_pthread_rwlock_t)
+typedef struct { union { int __i[sizeof(long)==8?14:8]; volatile int __vi[sizeof(long)==8?14:8]; void *__p[sizeof(long)==8?7:8]; } __u; } pthread_rwlock_t;
+#define __DEFINED_pthread_rwlock_t
+#endif
+
+#if defined(__NEED_pthread_barrier_t) && !defined(__DEFINED_pthread_barrier_t)
+typedef struct { union { int __i[sizeof(long)==8?8:5]; volatile int __vi[sizeof(long)==8?8:5]; void *__p[sizeof(long)==8?4:5]; } __u; } pthread_barrier_t;
+#define __DEFINED_pthread_barrier_t
+#endif
+
+
 #undef _Addr
 #undef _Int64
 #undef _Reg
\ No newline at end of file
diff --git a/lib/libc/include/x86_64-linux-musl/bits/limits.h b/lib/libc/include/x86_64-linux-musl/bits/limits.h
index e984295854..fc11433d98 100644
--- a/lib/libc/include/x86_64-linux-musl/bits/limits.h
+++ b/lib/libc/include/x86_64-linux-musl/bits/limits.h
@@ -1,8 +1 @@
-#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-#define PAGESIZE 4096
-#define LONG_BIT 64
-#endif
-
-#define LONG_MAX  0x7fffffffffffffffL
-#define LLONG_MAX  0x7fffffffffffffffLL
\ No newline at end of file
+#define PAGESIZE 4096
\ No newline at end of file
diff --git a/lib/libc/include/x86_64-linux-musl/bits/socket.h b/lib/libc/include/x86_64-linux-musl/bits/socket.h
deleted file mode 100644
index 0372d7dd0e..0000000000
--- a/lib/libc/include/x86_64-linux-musl/bits/socket.h
+++ /dev/null
@@ -1,16 +0,0 @@
-struct msghdr {
-	void *msg_name;
-	socklen_t msg_namelen;
-	struct iovec *msg_iov;
-	int msg_iovlen, __pad1;
-	void *msg_control;
-	socklen_t msg_controllen, __pad2;
-	int msg_flags;
-};
-
-struct cmsghdr {
-	socklen_t cmsg_len;
-	int __pad1;
-	int cmsg_level;
-	int cmsg_type;
-};
\ No newline at end of file
diff --git a/lib/libc/include/x86_64-linux-musl/bits/syscall.h b/lib/libc/include/x86_64-linux-musl/bits/syscall.h
index fed8f0384e..e4dbe4b061 100644
--- a/lib/libc/include/x86_64-linux-musl/bits/syscall.h
+++ b/lib/libc/include/x86_64-linux-musl/bits/syscall.h
@@ -343,6 +343,8 @@
 #define __NR_fsconfig		431
 #define __NR_fsmount		432
 #define __NR_fspick		433
+#define __NR_pidfd_open		434
+#define __NR_clone3		435
 
 #define SYS_read				0
 #define SYS_write				1
@@ -688,4 +690,6 @@
 #define SYS_fsopen		430
 #define SYS_fsconfig		431
 #define SYS_fsmount		432
-#define SYS_fspick		433
\ No newline at end of file
+#define SYS_fspick		433
+#define SYS_pidfd_open		434
+#define SYS_clone3		435
\ No newline at end of file
diff --git a/lib/libc/musl/COPYRIGHT b/lib/libc/musl/COPYRIGHT
index 67802d1190..e647237146 100644
--- a/lib/libc/musl/COPYRIGHT
+++ b/lib/libc/musl/COPYRIGHT
@@ -1,7 +1,7 @@
 musl as a whole is licensed under the following standard MIT license:
 
 ----------------------------------------------------------------------
-Copyright © 2005-2019 Rich Felker, et al.
+Copyright © 2005-2020 Rich Felker, et al.
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
@@ -26,6 +26,7 @@ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 Authors/contributors include:
 
 A. Wilcox
+Ada Worcester
 Alex Dowad
 Alex Suykov
 Alexander Monakov
@@ -65,7 +66,6 @@ Jeremy Huntwork
 Jo-Philipp Wich
 Joakim Sindholt
 John Spencer
-Josiah Worcester
 Julien Ramseier
 Justin Cormack
 Kaarle Ritvanen
diff --git a/lib/libc/musl/arch/aarch64/bits/alltypes.h.in b/lib/libc/musl/arch/aarch64/bits/alltypes.h.in
index d56abdac96..c547ca0b72 100644
--- a/lib/libc/musl/arch/aarch64/bits/alltypes.h.in
+++ b/lib/libc/musl/arch/aarch64/bits/alltypes.h.in
@@ -2,8 +2,13 @@
 #define _Int64 long
 #define _Reg long
 
-TYPEDEF __builtin_va_list va_list;
-TYPEDEF __builtin_va_list __isoc_va_list;
+#if __AARCH64EB__
+#define __BYTE_ORDER 4321
+#else
+#define __BYTE_ORDER 1234
+#endif
+
+#define __LONG_MAX 0x7fffffffffffffffL
 
 #ifndef __cplusplus
 TYPEDEF unsigned wchar_t;
@@ -17,14 +22,3 @@ TYPEDEF float float_t;
 TYPEDEF double double_t;
 
 TYPEDEF struct { long long __ll; long double __ld; } max_align_t;
-
-TYPEDEF long time_t;
-TYPEDEF long suseconds_t;
-
-TYPEDEF struct { union { int __i[14]; volatile int __vi[14]; unsigned long __s[7]; } __u; } pthread_attr_t;
-TYPEDEF struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } pthread_mutex_t;
-TYPEDEF struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } mtx_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } pthread_cond_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } cnd_t;
-TYPEDEF struct { union { int __i[14]; volatile int __vi[14]; void *__p[7]; } __u; } pthread_rwlock_t;
-TYPEDEF struct { union { int __i[8]; volatile int __vi[8]; void *__p[4]; } __u; } pthread_barrier_t;
diff --git a/lib/libc/musl/arch/aarch64/bits/endian.h b/lib/libc/musl/arch/aarch64/bits/endian.h
deleted file mode 100644
index 7a74d2febc..0000000000
--- a/lib/libc/musl/arch/aarch64/bits/endian.h
+++ /dev/null
@@ -1,5 +0,0 @@
-#if __AARCH64EB__
-#define __BYTE_ORDER __BIG_ENDIAN
-#else
-#define __BYTE_ORDER __LITTLE_ENDIAN
-#endif
diff --git a/lib/libc/musl/arch/aarch64/bits/limits.h b/lib/libc/musl/arch/aarch64/bits/limits.h
deleted file mode 100644
index 0226588c3d..0000000000
--- a/lib/libc/musl/arch/aarch64/bits/limits.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-#define LONG_BIT 64
-#endif
-
-#define LONG_MAX  0x7fffffffffffffffL
-#define LLONG_MAX  0x7fffffffffffffffLL
diff --git a/lib/libc/musl/arch/aarch64/bits/socket.h b/lib/libc/musl/arch/aarch64/bits/socket.h
deleted file mode 100644
index c11677e9d0..0000000000
--- a/lib/libc/musl/arch/aarch64/bits/socket.h
+++ /dev/null
@@ -1,33 +0,0 @@
-#include <endian.h>
-
-struct msghdr {
-	void *msg_name;
-	socklen_t msg_namelen;
-	struct iovec *msg_iov;
-#if __BYTE_ORDER == __BIG_ENDIAN
-	int __pad1, msg_iovlen;
-#else
-	int msg_iovlen, __pad1;
-#endif
-	void *msg_control;
-#if __BYTE_ORDER == __BIG_ENDIAN
-	int __pad2;
-	socklen_t msg_controllen;
-#else
-	socklen_t msg_controllen;
-	int __pad2;
-#endif
-	int msg_flags;
-};
-
-struct cmsghdr {
-#if __BYTE_ORDER == __BIG_ENDIAN
-	int __pad1;
-	socklen_t cmsg_len;
-#else
-	socklen_t cmsg_len;
-	int __pad1;
-#endif
-	int cmsg_level;
-	int cmsg_type;
-};
diff --git a/lib/libc/musl/arch/aarch64/bits/syscall.h.in b/lib/libc/musl/arch/aarch64/bits/syscall.h.in
index 955e2cabad..93648afdfe 100644
--- a/lib/libc/musl/arch/aarch64/bits/syscall.h.in
+++ b/lib/libc/musl/arch/aarch64/bits/syscall.h.in
@@ -287,4 +287,6 @@
 #define __NR_fsconfig		431
 #define __NR_fsmount		432
 #define __NR_fspick		433
+#define __NR_pidfd_open		434
+#define __NR_clone3		435
 
diff --git a/lib/libc/musl/arch/aarch64/reloc.h b/lib/libc/musl/arch/aarch64/reloc.h
index 40cf0b2891..b1b68c7255 100644
--- a/lib/libc/musl/arch/aarch64/reloc.h
+++ b/lib/libc/musl/arch/aarch64/reloc.h
@@ -1,5 +1,3 @@
-#include <endian.h>
-
 #if __BYTE_ORDER == __BIG_ENDIAN
 #define ENDIAN_SUFFIX "_be"
 #else
diff --git a/lib/libc/musl/arch/arm/bits/alltypes.h.in b/lib/libc/musl/arch/arm/bits/alltypes.h.in
index 667963c7e1..d62bd7bde6 100644
--- a/lib/libc/musl/arch/arm/bits/alltypes.h.in
+++ b/lib/libc/musl/arch/arm/bits/alltypes.h.in
@@ -1,9 +1,15 @@
+#define _REDIR_TIME64 1
 #define _Addr int
 #define _Int64 long long
 #define _Reg int
 
-TYPEDEF __builtin_va_list va_list;
-TYPEDEF __builtin_va_list __isoc_va_list;
+#if __ARMEB__
+#define __BYTE_ORDER 4321
+#else
+#define __BYTE_ORDER 1234
+#endif
+
+#define __LONG_MAX 0x7fffffffL
 
 #ifndef __cplusplus
 TYPEDEF unsigned wchar_t;
@@ -13,14 +19,3 @@ TYPEDEF float float_t;
 TYPEDEF double double_t;
 
 TYPEDEF struct { long long __ll; long double __ld; } max_align_t;
-
-TYPEDEF long time_t;
-TYPEDEF long suseconds_t;
-
-TYPEDEF struct { union { int __i[9]; volatile int __vi[9]; unsigned __s[9]; } __u; } pthread_attr_t;
-TYPEDEF struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } pthread_mutex_t;
-TYPEDEF struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } mtx_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } pthread_cond_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } cnd_t;
-TYPEDEF struct { union { int __i[8]; volatile int __vi[8]; void *__p[8]; } __u; } pthread_rwlock_t;
-TYPEDEF struct { union { int __i[5]; volatile int __vi[5]; void *__p[5]; } __u; } pthread_barrier_t;
diff --git a/lib/libc/musl/arch/arm/bits/endian.h b/lib/libc/musl/arch/arm/bits/endian.h
deleted file mode 100644
index 5953724a0b..0000000000
--- a/lib/libc/musl/arch/arm/bits/endian.h
+++ /dev/null
@@ -1,5 +0,0 @@
-#if __ARMEB__
-#define __BYTE_ORDER __BIG_ENDIAN
-#else
-#define __BYTE_ORDER __LITTLE_ENDIAN
-#endif
diff --git a/lib/libc/musl/arch/arm/bits/ipcstat.h b/lib/libc/musl/arch/arm/bits/ipcstat.h
index 0018ad1e20..4f4fcb0c5b 100644
--- a/lib/libc/musl/arch/arm/bits/ipcstat.h
+++ b/lib/libc/musl/arch/arm/bits/ipcstat.h
@@ -1 +1 @@
-#define IPC_STAT 2
+#define IPC_STAT 0x102
diff --git a/lib/libc/musl/arch/arm/bits/limits.h b/lib/libc/musl/arch/arm/bits/limits.h
deleted file mode 100644
index fbc6d238dc..0000000000
--- a/lib/libc/musl/arch/arm/bits/limits.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-#define LONG_BIT 32
-#endif
-
-#define LONG_MAX  0x7fffffffL
-#define LLONG_MAX  0x7fffffffffffffffLL
diff --git a/lib/libc/musl/arch/arm/bits/msg.h b/lib/libc/musl/arch/arm/bits/msg.h
index bc8436c4ad..7bbbb2bf43 100644
--- a/lib/libc/musl/arch/arm/bits/msg.h
+++ b/lib/libc/musl/arch/arm/bits/msg.h
@@ -1,15 +1,18 @@
 struct msqid_ds {
 	struct ipc_perm msg_perm;
-	time_t msg_stime;
-	int __unused1;
-	time_t msg_rtime;
-	int __unused2;
-	time_t msg_ctime;
-	int __unused3;
+	unsigned long __msg_stime_lo;
+	unsigned long __msg_stime_hi;
+	unsigned long __msg_rtime_lo;
+	unsigned long __msg_rtime_hi;
+	unsigned long __msg_ctime_lo;
+	unsigned long __msg_ctime_hi;
 	unsigned long msg_cbytes;
 	msgqnum_t msg_qnum;
 	msglen_t msg_qbytes;
 	pid_t msg_lspid;
 	pid_t msg_lrpid;
 	unsigned long __unused[2];
+	time_t msg_stime;
+	time_t msg_rtime;
+	time_t msg_ctime;
 };
diff --git a/lib/libc/musl/arch/arm/bits/sem.h b/lib/libc/musl/arch/arm/bits/sem.h
index d383d4ea55..544e3d2a52 100644
--- a/lib/libc/musl/arch/arm/bits/sem.h
+++ b/lib/libc/musl/arch/arm/bits/sem.h
@@ -1,9 +1,9 @@
 struct semid_ds {
 	struct ipc_perm sem_perm;
-	time_t sem_otime;
-	long __unused1;
-	time_t sem_ctime;
-	long __unused2;
+	unsigned long __sem_otime_lo;
+	unsigned long __sem_otime_hi;
+	unsigned long __sem_ctime_lo;
+	unsigned long __sem_ctime_hi;
 #if __BYTE_ORDER == __LITTLE_ENDIAN
 	unsigned short sem_nsems;
 	char __sem_nsems_pad[sizeof(long)-sizeof(short)];
@@ -13,4 +13,6 @@ struct semid_ds {
 #endif
 	long __unused3;
 	long __unused4;
+	time_t sem_otime;
+	time_t sem_ctime;
 };
diff --git a/lib/libc/musl/arch/arm/bits/shm.h b/lib/libc/musl/arch/arm/bits/shm.h
index 81b2a29abb..725fb46968 100644
--- a/lib/libc/musl/arch/arm/bits/shm.h
+++ b/lib/libc/musl/arch/arm/bits/shm.h
@@ -3,17 +3,21 @@
 struct shmid_ds {
 	struct ipc_perm shm_perm;
 	size_t shm_segsz;
-	time_t shm_atime;
-	int __unused1;
-	time_t shm_dtime;
-	int __unused2;
-	time_t shm_ctime;
-	int __unused3;
+	unsigned long __shm_atime_lo;
+	unsigned long __shm_atime_hi;
+	unsigned long __shm_dtime_lo;
+	unsigned long __shm_dtime_hi;
+	unsigned long __shm_ctime_lo;
+	unsigned long __shm_ctime_hi;
 	pid_t shm_cpid;
 	pid_t shm_lpid;
 	unsigned long shm_nattch;
 	unsigned long __pad1;
 	unsigned long __pad2;
+	unsigned long __pad3;
+	time_t shm_atime;
+	time_t shm_dtime;
+	time_t shm_ctime;
 };
 
 struct shminfo {
diff --git a/lib/libc/musl/arch/arm/bits/stat.h b/lib/libc/musl/arch/arm/bits/stat.h
index 22b19bbfec..5d7828cf79 100644
--- a/lib/libc/musl/arch/arm/bits/stat.h
+++ b/lib/libc/musl/arch/arm/bits/stat.h
@@ -14,8 +14,12 @@ struct stat {
 	off_t st_size;
 	blksize_t st_blksize;
 	blkcnt_t st_blocks;
+	struct {
+		long tv_sec;
+		long tv_nsec;
+	} __st_atim32, __st_mtim32, __st_ctim32;
+	ino_t st_ino;
 	struct timespec st_atim;
 	struct timespec st_mtim;
 	struct timespec st_ctim;
-	ino_t st_ino;
 };
diff --git a/lib/libc/musl/arch/arm/bits/syscall.h.in b/lib/libc/musl/arch/arm/bits/syscall.h.in
index a565a4ee1f..11d677635b 100644
--- a/lib/libc/musl/arch/arm/bits/syscall.h.in
+++ b/lib/libc/musl/arch/arm/bits/syscall.h.in
@@ -55,8 +55,8 @@
 #define __NR_sethostname	74
 #define __NR_setrlimit	75
 #define __NR_getrusage	77
-#define __NR_gettimeofday	78
-#define __NR_settimeofday	79
+#define __NR_gettimeofday_time32	78
+#define __NR_settimeofday_time32	79
 #define __NR_getgroups	80
 #define __NR_setgroups	81
 #define __NR_symlink	83
@@ -211,14 +211,14 @@
 #define __NR_remap_file_pages	253
 #define __NR_set_tid_address	256
 #define __NR_timer_create	257
-#define __NR_timer_settime	258
-#define __NR_timer_gettime	259
+#define __NR_timer_settime32	258
+#define __NR_timer_gettime32	259
 #define __NR_timer_getoverrun	260
 #define __NR_timer_delete	261
-#define __NR_clock_settime	262
-#define __NR_clock_gettime	263
-#define __NR_clock_getres	264
-#define __NR_clock_nanosleep	265
+#define __NR_clock_settime32	262
+#define __NR_clock_gettime32	263
+#define __NR_clock_getres_time32	264
+#define __NR_clock_nanosleep_time32	265
 #define __NR_statfs64	266
 #define __NR_fstatfs64	267
 #define __NR_tgkill	268
@@ -308,8 +308,8 @@
 #define __NR_timerfd_create	350
 #define __NR_eventfd	351
 #define __NR_fallocate	352
-#define __NR_timerfd_settime	353
-#define __NR_timerfd_gettime	354
+#define __NR_timerfd_settime32	353
+#define __NR_timerfd_gettime32	354
 #define __NR_signalfd4	355
 #define __NR_eventfd2	356
 #define __NR_epoll_create1	357
@@ -387,6 +387,8 @@
 #define __NR_fsconfig		431
 #define __NR_fsmount		432
 #define __NR_fspick		433
+#define __NR_pidfd_open		434
+#define __NR_clone3		435
 
 #define __ARM_NR_breakpoint	0x0f0001
 #define __ARM_NR_cacheflush	0x0f0002
diff --git a/lib/libc/musl/arch/arm/reloc.h b/lib/libc/musl/arch/arm/reloc.h
index 2c2e7f58f9..d091d2ad92 100644
--- a/lib/libc/musl/arch/arm/reloc.h
+++ b/lib/libc/musl/arch/arm/reloc.h
@@ -1,5 +1,3 @@
-#include <endian.h>
-
 #if __BYTE_ORDER == __BIG_ENDIAN
 #define ENDIAN_SUFFIX "eb"
 #else
diff --git a/lib/libc/musl/arch/arm/syscall_arch.h b/lib/libc/musl/arch/arm/syscall_arch.h
index 53fb155c0d..4b08762d7b 100644
--- a/lib/libc/musl/arch/arm/syscall_arch.h
+++ b/lib/libc/musl/arch/arm/syscall_arch.h
@@ -99,7 +99,9 @@ static inline long __syscall6(long n, long a, long b, long c, long d, long e, lo
 }
 
 #define VDSO_USEFUL
-#define VDSO_CGT_SYM "__vdso_clock_gettime"
+#define VDSO_CGT32_SYM "__vdso_clock_gettime"
+#define VDSO_CGT32_VER "LINUX_2.6"
+#define VDSO_CGT_SYM "__vdso_clock_gettime64"
 #define VDSO_CGT_VER "LINUX_2.6"
 
 #define SYSCALL_FADVISE_6_ARG
diff --git a/lib/libc/musl/arch/generic/bits/dirent.h b/lib/libc/musl/arch/generic/bits/dirent.h
new file mode 100644
index 0000000000..c845fe82dd
--- /dev/null
+++ b/lib/libc/musl/arch/generic/bits/dirent.h
@@ -0,0 +1,11 @@
+#define _DIRENT_HAVE_D_RECLEN
+#define _DIRENT_HAVE_D_OFF
+#define _DIRENT_HAVE_D_TYPE
+
+struct dirent {
+	ino_t d_ino;
+	off_t d_off;
+	unsigned short d_reclen;
+	unsigned char d_type;
+	char d_name[256];
+};
diff --git a/lib/libc/musl/arch/generic/bits/ioctl.h b/lib/libc/musl/arch/generic/bits/ioctl.h
index d1a6c035f8..60ae8b850b 100644
--- a/lib/libc/musl/arch/generic/bits/ioctl.h
+++ b/lib/libc/musl/arch/generic/bits/ioctl.h
@@ -104,7 +104,12 @@
 #define FIOGETOWN       0x8903
 #define SIOCGPGRP       0x8904
 #define SIOCATMARK      0x8905
+#if __LONG_MAX == 0x7fffffff
+#define SIOCGSTAMP      _IOR(0x89, 6, char[16])
+#define SIOCGSTAMPNS    _IOR(0x89, 7, char[16])
+#else
 #define SIOCGSTAMP      0x8906
 #define SIOCGSTAMPNS    0x8907
+#endif
 
 #include <bits/ioctl_fix.h>
diff --git a/lib/libc/musl/arch/generic/bits/limits.h b/lib/libc/musl/arch/generic/bits/limits.h
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/lib/libc/musl/arch/generic/bits/socket.h b/lib/libc/musl/arch/generic/bits/socket.h
index 1f73b995c6..e69de29bb2 100644
--- a/lib/libc/musl/arch/generic/bits/socket.h
+++ b/lib/libc/musl/arch/generic/bits/socket.h
@@ -1,15 +0,0 @@
-struct msghdr {
-	void *msg_name;
-	socklen_t msg_namelen;
-	struct iovec *msg_iov;
-	int msg_iovlen;
-	void *msg_control;
-	socklen_t msg_controllen;
-	int msg_flags;
-};
-
-struct cmsghdr {
-	socklen_t cmsg_len;
-	int cmsg_level;
-	int cmsg_type;
-};
diff --git a/lib/libc/musl/arch/i386/bits/alltypes.h.in b/lib/libc/musl/arch/i386/bits/alltypes.h.in
index 1a8432d3e7..6feb03a6c3 100644
--- a/lib/libc/musl/arch/i386/bits/alltypes.h.in
+++ b/lib/libc/musl/arch/i386/bits/alltypes.h.in
@@ -1,14 +1,10 @@
+#define _REDIR_TIME64 1
 #define _Addr int
 #define _Int64 long long
 #define _Reg int
 
-#if __GNUC__ >= 3
-TYPEDEF __builtin_va_list va_list;
-TYPEDEF __builtin_va_list __isoc_va_list;
-#else
-TYPEDEF struct __va_list * va_list;
-TYPEDEF struct __va_list * __isoc_va_list;
-#endif
+#define __BYTE_ORDER 1234
+#define __LONG_MAX 0x7fffffffL
 
 #ifndef __cplusplus
 #ifdef __WCHAR_TYPE__
@@ -33,14 +29,3 @@ TYPEDEF struct { __attribute__((__aligned__(8))) long long __ll; long double __l
 #else
 TYPEDEF struct { alignas(8) long long __ll; long double __ld; } max_align_t;
 #endif
-
-TYPEDEF long time_t;
-TYPEDEF long suseconds_t;
-
-TYPEDEF struct { union { int __i[9]; volatile int __vi[9]; unsigned __s[9]; } __u; } pthread_attr_t;
-TYPEDEF struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } pthread_mutex_t;
-TYPEDEF struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } mtx_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } pthread_cond_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } cnd_t;
-TYPEDEF struct { union { int __i[8]; volatile int __vi[8]; void *__p[8]; } __u; } pthread_rwlock_t;
-TYPEDEF struct { union { int __i[5]; volatile int __vi[5]; void *__p[5]; } __u; } pthread_barrier_t;
diff --git a/lib/libc/musl/arch/i386/bits/endian.h b/lib/libc/musl/arch/i386/bits/endian.h
deleted file mode 100644
index 172c338f50..0000000000
--- a/lib/libc/musl/arch/i386/bits/endian.h
+++ /dev/null
@@ -1 +0,0 @@
-#define __BYTE_ORDER __LITTLE_ENDIAN
diff --git a/lib/libc/musl/arch/i386/bits/ipcstat.h b/lib/libc/musl/arch/i386/bits/ipcstat.h
index 0018ad1e20..4f4fcb0c5b 100644
--- a/lib/libc/musl/arch/i386/bits/ipcstat.h
+++ b/lib/libc/musl/arch/i386/bits/ipcstat.h
@@ -1 +1 @@
-#define IPC_STAT 2
+#define IPC_STAT 0x102
diff --git a/lib/libc/musl/arch/i386/bits/limits.h b/lib/libc/musl/arch/i386/bits/limits.h
index c340ceb220..07743b6fd6 100644
--- a/lib/libc/musl/arch/i386/bits/limits.h
+++ b/lib/libc/musl/arch/i386/bits/limits.h
@@ -1,8 +1 @@
-#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
 #define PAGESIZE 4096
-#define LONG_BIT 32
-#endif
-
-#define LONG_MAX  0x7fffffffL
-#define LLONG_MAX  0x7fffffffffffffffLL
diff --git a/lib/libc/musl/arch/i386/bits/msg.h b/lib/libc/musl/arch/i386/bits/msg.h
index bc8436c4ad..7bbbb2bf43 100644
--- a/lib/libc/musl/arch/i386/bits/msg.h
+++ b/lib/libc/musl/arch/i386/bits/msg.h
@@ -1,15 +1,18 @@
 struct msqid_ds {
 	struct ipc_perm msg_perm;
-	time_t msg_stime;
-	int __unused1;
-	time_t msg_rtime;
-	int __unused2;
-	time_t msg_ctime;
-	int __unused3;
+	unsigned long __msg_stime_lo;
+	unsigned long __msg_stime_hi;
+	unsigned long __msg_rtime_lo;
+	unsigned long __msg_rtime_hi;
+	unsigned long __msg_ctime_lo;
+	unsigned long __msg_ctime_hi;
 	unsigned long msg_cbytes;
 	msgqnum_t msg_qnum;
 	msglen_t msg_qbytes;
 	pid_t msg_lspid;
 	pid_t msg_lrpid;
 	unsigned long __unused[2];
+	time_t msg_stime;
+	time_t msg_rtime;
+	time_t msg_ctime;
 };
diff --git a/lib/libc/musl/arch/i386/bits/sem.h b/lib/libc/musl/arch/i386/bits/sem.h
index e61571c121..65661542a5 100644
--- a/lib/libc/musl/arch/i386/bits/sem.h
+++ b/lib/libc/musl/arch/i386/bits/sem.h
@@ -1,11 +1,13 @@
 struct semid_ds {
 	struct ipc_perm sem_perm;
-	time_t sem_otime;
-	long __unused1;
-	time_t sem_ctime;
-	long __unused2;
+	unsigned long __sem_otime_lo;
+	unsigned long __sem_otime_hi;
+	unsigned long __sem_ctime_lo;
+	unsigned long __sem_ctime_hi;
 	unsigned short sem_nsems;
 	char __sem_nsems_pad[sizeof(long)-sizeof(short)];
 	long __unused3;
 	long __unused4;
+	time_t sem_otime;
+	time_t sem_ctime;
 };
diff --git a/lib/libc/musl/arch/i386/bits/shm.h b/lib/libc/musl/arch/i386/bits/shm.h
index 81b2a29abb..725fb46968 100644
--- a/lib/libc/musl/arch/i386/bits/shm.h
+++ b/lib/libc/musl/arch/i386/bits/shm.h
@@ -3,17 +3,21 @@
 struct shmid_ds {
 	struct ipc_perm shm_perm;
 	size_t shm_segsz;
-	time_t shm_atime;
-	int __unused1;
-	time_t shm_dtime;
-	int __unused2;
-	time_t shm_ctime;
-	int __unused3;
+	unsigned long __shm_atime_lo;
+	unsigned long __shm_atime_hi;
+	unsigned long __shm_dtime_lo;
+	unsigned long __shm_dtime_hi;
+	unsigned long __shm_ctime_lo;
+	unsigned long __shm_ctime_hi;
 	pid_t shm_cpid;
 	pid_t shm_lpid;
 	unsigned long shm_nattch;
 	unsigned long __pad1;
 	unsigned long __pad2;
+	unsigned long __pad3;
+	time_t shm_atime;
+	time_t shm_dtime;
+	time_t shm_ctime;
 };
 
 struct shminfo {
diff --git a/lib/libc/musl/arch/i386/bits/stat.h b/lib/libc/musl/arch/i386/bits/stat.h
index 22b19bbfec..5d7828cf79 100644
--- a/lib/libc/musl/arch/i386/bits/stat.h
+++ b/lib/libc/musl/arch/i386/bits/stat.h
@@ -14,8 +14,12 @@ struct stat {
 	off_t st_size;
 	blksize_t st_blksize;
 	blkcnt_t st_blocks;
+	struct {
+		long tv_sec;
+		long tv_nsec;
+	} __st_atim32, __st_mtim32, __st_ctim32;
+	ino_t st_ino;
 	struct timespec st_atim;
 	struct timespec st_mtim;
 	struct timespec st_ctim;
-	ino_t st_ino;
 };
diff --git a/lib/libc/musl/arch/i386/bits/syscall.h.in b/lib/libc/musl/arch/i386/bits/syscall.h.in
index c95e108e55..1ae4e48a8f 100644
--- a/lib/libc/musl/arch/i386/bits/syscall.h.in
+++ b/lib/libc/musl/arch/i386/bits/syscall.h.in
@@ -76,8 +76,8 @@
 #define __NR_setrlimit		 75
 #define __NR_getrlimit		 76   /* Back compatible 2Gig limited rlimit */
 #define __NR_getrusage		 77
-#define __NR_gettimeofday	 78
-#define __NR_settimeofday	 79
+#define __NR_gettimeofday_time32	 78
+#define __NR_settimeofday_time32	 79
 #define __NR_getgroups		 80
 #define __NR_setgroups		 81
 #define __NR_select		 82
@@ -257,14 +257,14 @@
 #define __NR_remap_file_pages	257
 #define __NR_set_tid_address	258
 #define __NR_timer_create	259
-#define __NR_timer_settime	(__NR_timer_create+1)
-#define __NR_timer_gettime	(__NR_timer_create+2)
+#define __NR_timer_settime32	(__NR_timer_create+1)
+#define __NR_timer_gettime32	(__NR_timer_create+2)
 #define __NR_timer_getoverrun	(__NR_timer_create+3)
 #define __NR_timer_delete	(__NR_timer_create+4)
-#define __NR_clock_settime	(__NR_timer_create+5)
-#define __NR_clock_gettime	(__NR_timer_create+6)
-#define __NR_clock_getres	(__NR_timer_create+7)
-#define __NR_clock_nanosleep	(__NR_timer_create+8)
+#define __NR_clock_settime32	(__NR_timer_create+5)
+#define __NR_clock_gettime32	(__NR_timer_create+6)
+#define __NR_clock_getres_time32	(__NR_timer_create+7)
+#define __NR_clock_nanosleep_time32	(__NR_timer_create+8)
 #define __NR_statfs64		268
 #define __NR_fstatfs64		269
 #define __NR_tgkill		270
@@ -322,8 +322,8 @@
 #define __NR_timerfd_create	322
 #define __NR_eventfd		323
 #define __NR_fallocate		324
-#define __NR_timerfd_settime	325
-#define __NR_timerfd_gettime	326
+#define __NR_timerfd_settime32	325
+#define __NR_timerfd_gettime32	326
 #define __NR_signalfd4		327
 #define __NR_eventfd2		328
 #define __NR_epoll_create1	329
@@ -424,4 +424,6 @@
 #define __NR_fsconfig		431
 #define __NR_fsmount		432
 #define __NR_fspick		433
+#define __NR_pidfd_open		434
+#define __NR_clone3		435
 
diff --git a/lib/libc/musl/arch/i386/syscall_arch.h b/lib/libc/musl/arch/i386/syscall_arch.h
index 22b0b28b83..69642e578a 100644
--- a/lib/libc/musl/arch/i386/syscall_arch.h
+++ b/lib/libc/musl/arch/i386/syscall_arch.h
@@ -83,7 +83,9 @@ static inline long __syscall6(long n, long a1, long a2, long a3, long a4, long a
 }
 
 #define VDSO_USEFUL
-#define VDSO_CGT_SYM "__vdso_clock_gettime"
+#define VDSO_CGT32_SYM "__vdso_clock_gettime"
+#define VDSO_CGT32_VER "LINUX_2.6"
+#define VDSO_CGT_SYM "__vdso_clock_gettime64"
 #define VDSO_CGT_VER "LINUX_2.6"
 
 #define SYSCALL_USE_SOCKETCALL
diff --git a/lib/libc/musl/arch/mips/bits/alltypes.h.in b/lib/libc/musl/arch/mips/bits/alltypes.h.in
index 66ca18ad61..ff934a4c42 100644
--- a/lib/libc/musl/arch/mips/bits/alltypes.h.in
+++ b/lib/libc/musl/arch/mips/bits/alltypes.h.in
@@ -1,9 +1,15 @@
+#define _REDIR_TIME64 1
 #define _Addr int
 #define _Int64 long long
 #define _Reg int
 
-TYPEDEF __builtin_va_list va_list;
-TYPEDEF __builtin_va_list __isoc_va_list;
+#if _MIPSEL || __MIPSEL || __MIPSEL__
+#define __BYTE_ORDER 1234
+#else
+#define __BYTE_ORDER 4321
+#endif
+
+#define __LONG_MAX 0x7fffffffL
 
 #ifndef __cplusplus
 TYPEDEF int wchar_t;
@@ -13,14 +19,3 @@ TYPEDEF float float_t;
 TYPEDEF double double_t;
 
 TYPEDEF struct { long long __ll; long double __ld; } max_align_t;
-
-TYPEDEF long time_t;
-TYPEDEF long suseconds_t;
-
-TYPEDEF struct { union { int __i[9]; volatile int __vi[9]; unsigned __s[9]; } __u; } pthread_attr_t;
-TYPEDEF struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } pthread_mutex_t;
-TYPEDEF struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } mtx_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } pthread_cond_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } cnd_t;
-TYPEDEF struct { union { int __i[8]; volatile int __vi[8]; void *__p[8]; } __u; } pthread_rwlock_t;
-TYPEDEF struct { union { int __i[5]; volatile int __vi[5]; void *__p[5]; } __u; } pthread_barrier_t;
diff --git a/lib/libc/musl/arch/mips/bits/endian.h b/lib/libc/musl/arch/mips/bits/endian.h
deleted file mode 100644
index 5399dcb544..0000000000
--- a/lib/libc/musl/arch/mips/bits/endian.h
+++ /dev/null
@@ -1,5 +0,0 @@
-#if _MIPSEL || __MIPSEL || __MIPSEL__
-#define __BYTE_ORDER __LITTLE_ENDIAN
-#else
-#define __BYTE_ORDER __BIG_ENDIAN
-#endif
diff --git a/lib/libc/musl/arch/mips/bits/hwcap.h b/lib/libc/musl/arch/mips/bits/hwcap.h
index 13e86fe702..7986deb7f6 100644
--- a/lib/libc/musl/arch/mips/bits/hwcap.h
+++ b/lib/libc/musl/arch/mips/bits/hwcap.h
@@ -1,3 +1,14 @@
 #define HWCAP_MIPS_R6		(1 << 0)
 #define HWCAP_MIPS_MSA		(1 << 1)
 #define HWCAP_MIPS_CRC32	(1 << 2)
+#define HWCAP_MIPS_MIPS16	(1 << 3)
+#define HWCAP_MIPS_MDMX		(1 << 4)
+#define HWCAP_MIPS_MIPS3D	(1 << 5)
+#define HWCAP_MIPS_SMARTMIPS	(1 << 6)
+#define HWCAP_MIPS_DSP		(1 << 7)
+#define HWCAP_MIPS_DSP2		(1 << 8)
+#define HWCAP_MIPS_DSP3		(1 << 9)
+#define HWCAP_MIPS_MIPS16E2	(1 << 10)
+#define HWCAP_LOONGSON_MMI	(1 << 11)
+#define HWCAP_LOONGSON_EXT	(1 << 12)
+#define HWCAP_LOONGSON_EXT2	(1 << 13)
diff --git a/lib/libc/musl/arch/mips/bits/ioctl.h b/lib/libc/musl/arch/mips/bits/ioctl.h
index e277c3f05c..e20bf19eaa 100644
--- a/lib/libc/musl/arch/mips/bits/ioctl.h
+++ b/lib/libc/musl/arch/mips/bits/ioctl.h
@@ -110,5 +110,5 @@
 #define SIOCATMARK      _IOR('s', 7, int)
 #define SIOCSPGRP       _IOW('s', 8, pid_t)
 #define SIOCGPGRP       _IOR('s', 9, pid_t)
-#define SIOCGSTAMP      0x8906
-#define SIOCGSTAMPNS    0x8907
+#define SIOCGSTAMP      _IOR(0x89, 6, char[16])
+#define SIOCGSTAMPNS    _IOR(0x89, 7, char[16])
diff --git a/lib/libc/musl/arch/mips/bits/ipcstat.h b/lib/libc/musl/arch/mips/bits/ipcstat.h
index 0018ad1e20..4f4fcb0c5b 100644
--- a/lib/libc/musl/arch/mips/bits/ipcstat.h
+++ b/lib/libc/musl/arch/mips/bits/ipcstat.h
@@ -1 +1 @@
-#define IPC_STAT 2
+#define IPC_STAT 0x102
diff --git a/lib/libc/musl/arch/mips/bits/limits.h b/lib/libc/musl/arch/mips/bits/limits.h
deleted file mode 100644
index fbc6d238dc..0000000000
--- a/lib/libc/musl/arch/mips/bits/limits.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-#define LONG_BIT 32
-#endif
-
-#define LONG_MAX  0x7fffffffL
-#define LLONG_MAX  0x7fffffffffffffffLL
diff --git a/lib/libc/musl/arch/mips/bits/msg.h b/lib/libc/musl/arch/mips/bits/msg.h
index f28aece8fa..c734dbb570 100644
--- a/lib/libc/musl/arch/mips/bits/msg.h
+++ b/lib/libc/musl/arch/mips/bits/msg.h
@@ -1,19 +1,19 @@
 struct msqid_ds {
 	struct ipc_perm msg_perm;
 #if _MIPSEL || __MIPSEL || __MIPSEL__
-	time_t msg_stime;
-	int __unused1;
-	time_t msg_rtime;
-	int __unused2;
-	time_t msg_ctime;
-	int __unused3;
+	unsigned long __msg_stime_lo;
+	unsigned long __msg_stime_hi;
+	unsigned long __msg_rtime_lo;
+	unsigned long __msg_rtime_hi;
+	unsigned long __msg_ctime_lo;
+	unsigned long __msg_ctime_hi;
 #else
-	int __unused1;
-	time_t msg_stime;
-	int __unused2;
-	time_t msg_rtime;
-	int __unused3;
-	time_t msg_ctime;
+	unsigned long __msg_stime_hi;
+	unsigned long __msg_stime_lo;
+	unsigned long __msg_rtime_hi;
+	unsigned long __msg_rtime_lo;
+	unsigned long __msg_ctime_hi;
+	unsigned long __msg_ctime_lo;
 #endif
 	unsigned long msg_cbytes;
 	msgqnum_t msg_qnum;
@@ -21,4 +21,7 @@ struct msqid_ds {
 	pid_t msg_lspid;
 	pid_t msg_lrpid;
 	unsigned long __unused[2];
+	time_t msg_stime;
+	time_t msg_rtime;
+	time_t msg_ctime;
 };
diff --git a/lib/libc/musl/arch/mips/bits/sem.h b/lib/libc/musl/arch/mips/bits/sem.h
index 5184eb5977..fe6f094858 100644
--- a/lib/libc/musl/arch/mips/bits/sem.h
+++ b/lib/libc/musl/arch/mips/bits/sem.h
@@ -1,7 +1,7 @@
 struct semid_ds {
 	struct ipc_perm sem_perm;
-	time_t sem_otime;
-	time_t sem_ctime;
+	unsigned long __sem_otime_lo;
+	unsigned long __sem_ctime_lo;
 #if __BYTE_ORDER == __LITTLE_ENDIAN
 	unsigned short sem_nsems;
 	char __sem_nsems_pad[sizeof(long)-sizeof(short)];
@@ -9,6 +9,8 @@ struct semid_ds {
 	char __sem_nsems_pad[sizeof(long)-sizeof(short)];
 	unsigned short sem_nsems;
 #endif
-	long __unused3;
-	long __unused4;
+	unsigned long __sem_otime_hi;
+	unsigned long __sem_ctime_hi;
+	time_t sem_otime;
+	time_t sem_ctime;
 };
diff --git a/lib/libc/musl/arch/mips/bits/shm.h b/lib/libc/musl/arch/mips/bits/shm.h
index 8d19378191..ab8c642d82 100644
--- a/lib/libc/musl/arch/mips/bits/shm.h
+++ b/lib/libc/musl/arch/mips/bits/shm.h
@@ -3,14 +3,19 @@
 struct shmid_ds {
 	struct ipc_perm shm_perm;
 	size_t shm_segsz;
-	time_t shm_atime;
-	time_t shm_dtime;
-	time_t shm_ctime;
+	unsigned long __shm_atime_lo;
+	unsigned long __shm_dtime_lo;
+	unsigned long __shm_ctime_lo;
 	pid_t shm_cpid;
 	pid_t shm_lpid;
 	unsigned long shm_nattch;
-	unsigned long __pad1;
-	unsigned long __pad2;
+	unsigned short __shm_atime_hi;
+	unsigned short __shm_dtime_hi;
+	unsigned short __shm_ctime_hi;
+	unsigned short __pad1;
+	time_t shm_atime;
+	time_t shm_dtime;
+	time_t shm_ctime;
 };
 
 struct shminfo {
diff --git a/lib/libc/musl/arch/mips/bits/signal.h b/lib/libc/musl/arch/mips/bits/signal.h
index 1a84de5904..e1d97ac781 100644
--- a/lib/libc/musl/arch/mips/bits/signal.h
+++ b/lib/libc/musl/arch/mips/bits/signal.h
@@ -19,14 +19,18 @@ typedef struct {
 } fpregset_t;
 struct sigcontext {
 	unsigned sc_regmask, sc_status;
-	unsigned long long sc_pc, sc_regs[32], sc_fpregs[32];
+	unsigned long long sc_pc;
+	gregset_t sc_regs;
+	fpregset_t sc_fpregs;
 	unsigned sc_ownedfp, sc_fpc_csr, sc_fpc_eir, sc_used_math, sc_dsp;
 	unsigned long long sc_mdhi, sc_mdlo;
 	unsigned long sc_hi1, sc_lo1, sc_hi2, sc_lo2, sc_hi3, sc_lo3;
 };
 typedef struct {
 	unsigned regmask, status;
-	unsigned long long pc, gregs[32], fpregs[32];
+	unsigned long long pc;
+	gregset_t gregs;
+	fpregset_t fpregs;
 	unsigned ownedfp, fpc_csr, fpc_eir, used_math, dsp;
 	unsigned long long mdhi, mdlo;
 	unsigned long hi1, lo1, hi2, lo2, hi3, lo3;
diff --git a/lib/libc/musl/arch/mips/bits/socket.h b/lib/libc/musl/arch/mips/bits/socket.h
index b82c7d341f..02fbb88b4d 100644
--- a/lib/libc/musl/arch/mips/bits/socket.h
+++ b/lib/libc/musl/arch/mips/bits/socket.h
@@ -1,19 +1,3 @@
-struct msghdr {
-	void *msg_name;
-	socklen_t msg_namelen;
-	struct iovec *msg_iov;
-	int msg_iovlen;
-	void *msg_control;
-	socklen_t msg_controllen;
-	int msg_flags;
-};
-
-struct cmsghdr {
-	socklen_t cmsg_len;
-	int cmsg_level;
-	int cmsg_type;
-};
-
 #define SOCK_STREAM    2
 #define SOCK_DGRAM     1
 
@@ -32,8 +16,6 @@ struct cmsghdr {
 #define SO_RCVBUF       0x1002
 #define SO_SNDLOWAT     0x1003
 #define SO_RCVLOWAT     0x1004
-#define SO_RCVTIMEO     0x1006
-#define SO_SNDTIMEO     0x1005
 #define SO_ERROR        0x1007
 #define SO_TYPE         0x1008
 #define SO_ACCEPTCONN   0x1009
diff --git a/lib/libc/musl/arch/mips/bits/stat.h b/lib/libc/musl/arch/mips/bits/stat.h
index 3291a63620..48d4ac8044 100644
--- a/lib/libc/musl/arch/mips/bits/stat.h
+++ b/lib/libc/musl/arch/mips/bits/stat.h
@@ -12,11 +12,15 @@ struct stat {
 	dev_t st_rdev;
 	long __st_padding2[2];
 	off_t st_size;
-	struct timespec st_atim;
-	struct timespec st_mtim;
-	struct timespec st_ctim;
+	struct {
+		long tv_sec;
+		long tv_nsec;
+	} __st_atim32, __st_mtim32, __st_ctim32;
 	blksize_t st_blksize;
 	long __st_padding3;
 	blkcnt_t st_blocks;
-        long __st_padding4[14];
+	struct timespec st_atim;
+	struct timespec st_mtim;
+	struct timespec st_ctim;
+	long __st_padding4[2];
 };
diff --git a/lib/libc/musl/arch/mips/bits/syscall.h.in b/lib/libc/musl/arch/mips/bits/syscall.h.in
index 582fa3b51c..86251bf31b 100644
--- a/lib/libc/musl/arch/mips/bits/syscall.h.in
+++ b/lib/libc/musl/arch/mips/bits/syscall.h.in
@@ -76,8 +76,8 @@
 #define __NR_setrlimit               4075
 #define __NR_getrlimit               4076
 #define __NR_getrusage               4077
-#define __NR_gettimeofday            4078
-#define __NR_settimeofday            4079
+#define __NR_gettimeofday_time32            4078
+#define __NR_settimeofday_time32            4079
 #define __NR_getgroups               4080
 #define __NR_setgroups               4081
 #define __NR_reserved82              4082
@@ -256,14 +256,14 @@
 #define __NR_statfs64                4255
 #define __NR_fstatfs64               4256
 #define __NR_timer_create            4257
-#define __NR_timer_settime           4258
-#define __NR_timer_gettime           4259
+#define __NR_timer_settime32           4258
+#define __NR_timer_gettime32           4259
 #define __NR_timer_getoverrun        4260
 #define __NR_timer_delete            4261
-#define __NR_clock_settime           4262
-#define __NR_clock_gettime           4263
-#define __NR_clock_getres            4264
-#define __NR_clock_nanosleep         4265
+#define __NR_clock_settime32           4262
+#define __NR_clock_gettime32           4263
+#define __NR_clock_getres_time32            4264
+#define __NR_clock_nanosleep_time32         4265
 #define __NR_tgkill                  4266
 #define __NR_utimes                  4267
 #define __NR_mbind                   4268
@@ -319,8 +319,8 @@
 #define __NR_eventfd                 4319
 #define __NR_fallocate               4320
 #define __NR_timerfd_create          4321
-#define __NR_timerfd_gettime         4322
-#define __NR_timerfd_settime         4323
+#define __NR_timerfd_gettime32         4322
+#define __NR_timerfd_settime32         4323
 #define __NR_signalfd4               4324
 #define __NR_eventfd2                4325
 #define __NR_epoll_create1           4326
@@ -406,4 +406,6 @@
 #define __NR_fsconfig		4431
 #define __NR_fsmount		4432
 #define __NR_fspick		4433
+#define __NR_pidfd_open		4434
+#define __NR_clone3		4435
 
diff --git a/lib/libc/musl/arch/mips/reloc.h b/lib/libc/musl/arch/mips/reloc.h
index b3d59a45ca..88d236390e 100644
--- a/lib/libc/musl/arch/mips/reloc.h
+++ b/lib/libc/musl/arch/mips/reloc.h
@@ -1,5 +1,3 @@
-#include <endian.h>
-
 #if __mips_isa_rev >= 6
 #define ISA_SUFFIX "r6"
 #else
diff --git a/lib/libc/musl/arch/mips/syscall_arch.h b/lib/libc/musl/arch/mips/syscall_arch.h
index 6ea73437b5..f821e73fcc 100644
--- a/lib/libc/musl/arch/mips/syscall_arch.h
+++ b/lib/libc/musl/arch/mips/syscall_arch.h
@@ -142,7 +142,9 @@ static inline long __syscall7(long n, long a, long b, long c, long d, long e, lo
 }
 
 #define VDSO_USEFUL
-#define VDSO_CGT_SYM "__vdso_clock_gettime"
+#define VDSO_CGT32_SYM "__vdso_clock_gettime"
+#define VDSO_CGT32_VER "LINUX_2.6"
+#define VDSO_CGT_SYM "__vdso_clock_gettime64"
 #define VDSO_CGT_VER "LINUX_2.6"
 
 #define SO_SNDTIMEO_OLD 0x1005
diff --git a/lib/libc/musl/arch/mips64/bits/alltypes.h.in b/lib/libc/musl/arch/mips64/bits/alltypes.h.in
index 2b2e34a831..fcd61ee853 100644
--- a/lib/libc/musl/arch/mips64/bits/alltypes.h.in
+++ b/lib/libc/musl/arch/mips64/bits/alltypes.h.in
@@ -2,8 +2,13 @@
 #define _Int64 long
 #define _Reg long
 
-TYPEDEF __builtin_va_list va_list;
-TYPEDEF __builtin_va_list __isoc_va_list;
+#if _MIPSEL || __MIPSEL || __MIPSEL__
+#define __BYTE_ORDER 1234
+#else
+#define __BYTE_ORDER 4321
+#endif
+
+#define __LONG_MAX 0x7fffffffffffffffL
 
 #ifndef __cplusplus
 TYPEDEF int wchar_t;
@@ -14,15 +19,4 @@ TYPEDEF double double_t;
 
 TYPEDEF struct { long long __ll; long double __ld; } max_align_t;
 
-TYPEDEF long time_t;
-TYPEDEF long suseconds_t;
-
 TYPEDEF unsigned nlink_t;
-
-TYPEDEF struct { union { int __i[14]; volatile int __vi[14]; unsigned long __s[7]; } __u; } pthread_attr_t;
-TYPEDEF struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } pthread_mutex_t;
-TYPEDEF struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } mtx_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } pthread_cond_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } cnd_t;
-TYPEDEF struct { union { int __i[14]; volatile int __vi[14]; void *__p[7]; } __u; } pthread_rwlock_t;
-TYPEDEF struct { union { int __i[8]; volatile int __vi[8]; void *__p[4]; } __u; } pthread_barrier_t;
diff --git a/lib/libc/musl/arch/mips64/bits/endian.h b/lib/libc/musl/arch/mips64/bits/endian.h
deleted file mode 100644
index 5399dcb544..0000000000
--- a/lib/libc/musl/arch/mips64/bits/endian.h
+++ /dev/null
@@ -1,5 +0,0 @@
-#if _MIPSEL || __MIPSEL || __MIPSEL__
-#define __BYTE_ORDER __LITTLE_ENDIAN
-#else
-#define __BYTE_ORDER __BIG_ENDIAN
-#endif
diff --git a/lib/libc/musl/arch/mips64/bits/limits.h b/lib/libc/musl/arch/mips64/bits/limits.h
deleted file mode 100644
index 58698c62dc..0000000000
--- a/lib/libc/musl/arch/mips64/bits/limits.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-#define LONG_BIT 64
-#endif
-
-#define LONG_MAX 0x7fffffffffffffffL
-#define LLONG_MAX 0x7fffffffffffffffLL
diff --git a/lib/libc/musl/arch/mips64/bits/socket.h b/lib/libc/musl/arch/mips64/bits/socket.h
index 5aff0d91c2..519b9c8ead 100644
--- a/lib/libc/musl/arch/mips64/bits/socket.h
+++ b/lib/libc/musl/arch/mips64/bits/socket.h
@@ -1,37 +1,3 @@
-#include <endian.h>
-
-struct msghdr {
-	void *msg_name;
-	socklen_t msg_namelen;
-	struct iovec *msg_iov;
-#if __BYTE_ORDER == __BIG_ENDIAN
-	int __pad1, msg_iovlen;
-#else
-	int msg_iovlen, __pad1;
-#endif
-	void *msg_control;
-#if __BYTE_ORDER == __BIG_ENDIAN
-	int __pad2;
-	socklen_t msg_controllen;
-#else
-	socklen_t msg_controllen;
-	int __pad2;
-#endif
-	int msg_flags;
-};
-
-struct cmsghdr {
-#if __BYTE_ORDER == __BIG_ENDIAN
-	int __pad1;
-	socklen_t cmsg_len;
-#else
-	socklen_t cmsg_len;
-	int __pad1;
-#endif
-	int cmsg_level;
-	int cmsg_type;
-};
-
 #define SOCK_STREAM    2
 #define SOCK_DGRAM     1
 #define SOL_SOCKET     65535
diff --git a/lib/libc/musl/arch/mips64/bits/syscall.h.in b/lib/libc/musl/arch/mips64/bits/syscall.h.in
index 34b9752e6a..9b406e9a4d 100644
--- a/lib/libc/musl/arch/mips64/bits/syscall.h.in
+++ b/lib/libc/musl/arch/mips64/bits/syscall.h.in
@@ -336,4 +336,6 @@
 #define __NR_fsconfig		5431
 #define __NR_fsmount		5432
 #define __NR_fspick		5433
+#define __NR_pidfd_open		5434
+#define __NR_clone3		5435
 
diff --git a/lib/libc/musl/arch/mips64/reloc.h b/lib/libc/musl/arch/mips64/reloc.h
index bbd9bd9d2d..fdb5edc9ca 100644
--- a/lib/libc/musl/arch/mips64/reloc.h
+++ b/lib/libc/musl/arch/mips64/reloc.h
@@ -1,9 +1,3 @@
-#ifndef __RELOC_H__
-#define __RELOC_H__
-
-#define _GNU_SOURCE
-#include <endian.h>
-
 #if __mips_isa_rev >= 6
 #define ISA_SUFFIX "r6"
 #else
@@ -33,6 +27,8 @@
 #define REL_DTPOFF      R_MIPS_TLS_DTPREL64
 #define REL_TPOFF       R_MIPS_TLS_TPREL64
 
+#include <endian.h>
+
 #undef R_TYPE
 #undef R_SYM
 #undef R_INFO
@@ -62,5 +58,3 @@
 	"	daddu %0, %0, $ra \n" \
 	".set pop \n" \
 	: "=r"(*(fp)) : : "memory", "ra" )
-
-#endif
diff --git a/lib/libc/musl/arch/powerpc/bits/alltypes.h.in b/lib/libc/musl/arch/powerpc/bits/alltypes.h.in
index 8e687ef16d..b48df6a625 100644
--- a/lib/libc/musl/arch/powerpc/bits/alltypes.h.in
+++ b/lib/libc/musl/arch/powerpc/bits/alltypes.h.in
@@ -1,9 +1,10 @@
+#define _REDIR_TIME64 1
 #define _Addr int
 #define _Int64 long long
 #define _Reg int
 
-TYPEDEF __builtin_va_list va_list;
-TYPEDEF __builtin_va_list __isoc_va_list;
+#define __BYTE_ORDER 4321
+#define __LONG_MAX 0x7fffffffL
 
 #ifndef __cplusplus
 #ifdef __WCHAR_TYPE__
@@ -17,14 +18,3 @@ TYPEDEF float float_t;
 TYPEDEF double double_t;
 
 TYPEDEF struct { long long __ll; long double __ld; } max_align_t;
-
-TYPEDEF long time_t;
-TYPEDEF long suseconds_t;
-
-TYPEDEF struct { union { int __i[9]; volatile int __vi[9]; unsigned __s[9]; } __u; } pthread_attr_t;
-TYPEDEF struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } pthread_mutex_t;
-TYPEDEF struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } mtx_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } pthread_cond_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } cnd_t;
-TYPEDEF struct { union { int __i[8]; volatile int __vi[8]; void *__p[8]; } __u; } pthread_rwlock_t;
-TYPEDEF struct { union { int __i[5]; volatile int __vi[5]; void *__p[5]; } __u; } pthread_barrier_t;
diff --git a/lib/libc/musl/arch/powerpc/bits/endian.h b/lib/libc/musl/arch/powerpc/bits/endian.h
deleted file mode 100644
index 4442abf4eb..0000000000
--- a/lib/libc/musl/arch/powerpc/bits/endian.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#ifdef __BIG_ENDIAN__
-  #if __BIG_ENDIAN__
-    #define __BYTE_ORDER __BIG_ENDIAN
-  #endif
-#endif /* __BIG_ENDIAN__ */
-
-#ifdef __LITTLE_ENDIAN__
-  #if __LITTLE_ENDIAN__
-    #define __BYTE_ORDER __LITTLE_ENDIAN
-  #endif
-#endif /* __LITTLE_ENDIAN__ */
-
-#ifndef __BYTE_ORDER
-  #define __BYTE_ORDER __BIG_ENDIAN
-#endif
diff --git a/lib/libc/musl/arch/powerpc/bits/ioctl.h b/lib/libc/musl/arch/powerpc/bits/ioctl.h
index b6cbb18f47..ac9bfd204a 100644
--- a/lib/libc/musl/arch/powerpc/bits/ioctl.h
+++ b/lib/libc/musl/arch/powerpc/bits/ioctl.h
@@ -116,5 +116,5 @@
 #define FIOGETOWN       0x8903
 #define SIOCGPGRP       0x8904
 #define SIOCATMARK      0x8905
-#define SIOCGSTAMP      0x8906
-#define SIOCGSTAMPNS    0x8907
+#define SIOCGSTAMP      _IOR(0x89, 6, char[16])
+#define SIOCGSTAMPNS    _IOR(0x89, 7, char[16])
diff --git a/lib/libc/musl/arch/powerpc/bits/ipcstat.h b/lib/libc/musl/arch/powerpc/bits/ipcstat.h
index 0018ad1e20..4f4fcb0c5b 100644
--- a/lib/libc/musl/arch/powerpc/bits/ipcstat.h
+++ b/lib/libc/musl/arch/powerpc/bits/ipcstat.h
@@ -1 +1 @@
-#define IPC_STAT 2
+#define IPC_STAT 0x102
diff --git a/lib/libc/musl/arch/powerpc/bits/limits.h b/lib/libc/musl/arch/powerpc/bits/limits.h
deleted file mode 100644
index fbc6d238dc..0000000000
--- a/lib/libc/musl/arch/powerpc/bits/limits.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-#define LONG_BIT 32
-#endif
-
-#define LONG_MAX  0x7fffffffL
-#define LLONG_MAX  0x7fffffffffffffffLL
diff --git a/lib/libc/musl/arch/powerpc/bits/msg.h b/lib/libc/musl/arch/powerpc/bits/msg.h
index 171c11a34f..9fb15dccb2 100644
--- a/lib/libc/musl/arch/powerpc/bits/msg.h
+++ b/lib/libc/musl/arch/powerpc/bits/msg.h
@@ -1,15 +1,18 @@
 struct msqid_ds {
 	struct ipc_perm msg_perm;
-	int __unused1;
-	time_t msg_stime;
-	int __unused2;
-	time_t msg_rtime;
-	int __unused3;
-	time_t msg_ctime;
+	unsigned long __msg_stime_hi;
+	unsigned long __msg_stime_lo;
+	unsigned long __msg_rtime_hi;
+	unsigned long __msg_rtime_lo;
+	unsigned long __msg_ctime_hi;
+	unsigned long __msg_ctime_lo;
 	unsigned long msg_cbytes;
 	msgqnum_t msg_qnum;
 	msglen_t msg_qbytes;
 	pid_t msg_lspid;
 	pid_t msg_lrpid;
 	unsigned long __unused[2];
+	time_t msg_stime;
+	time_t msg_rtime;
+	time_t msg_ctime;
 };
diff --git a/lib/libc/musl/arch/powerpc/bits/sem.h b/lib/libc/musl/arch/powerpc/bits/sem.h
index bc2d6d1f51..28be484528 100644
--- a/lib/libc/musl/arch/powerpc/bits/sem.h
+++ b/lib/libc/musl/arch/powerpc/bits/sem.h
@@ -1,10 +1,12 @@
 struct semid_ds {
 	struct ipc_perm sem_perm;
-	int __unused1;
-	time_t sem_otime;
-	int  __unused2;
-	time_t sem_ctime;
+	unsigned long __sem_otime_hi;
+	unsigned long __sem_otime_lo;
+	unsigned long __sem_ctime_hi;
+	unsigned long __sem_ctime_lo;
 	unsigned short __sem_nsems_pad, sem_nsems;
 	long __unused3;
 	long __unused4;
+	time_t sem_otime;
+	time_t sem_ctime;
 };
diff --git a/lib/libc/musl/arch/powerpc/bits/shm.h b/lib/libc/musl/arch/powerpc/bits/shm.h
index b19801d51a..fb1d4020f6 100644
--- a/lib/libc/musl/arch/powerpc/bits/shm.h
+++ b/lib/libc/musl/arch/powerpc/bits/shm.h
@@ -2,19 +2,21 @@
 
 struct shmid_ds {
 	struct ipc_perm shm_perm;
-	int __unused1;
-	time_t shm_atime;
-	int __unused2;
-	time_t shm_dtime;
-	int __unused3;
-	time_t shm_ctime;
-	int __unused4;
+	unsigned long __shm_atime_hi;
+	unsigned long __shm_atime_lo;
+	unsigned long __shm_dtime_hi;
+	unsigned long __shm_dtime_lo;
+	unsigned long __shm_ctime_hi;
+	unsigned long __shm_ctime_lo;
 	size_t shm_segsz;
 	pid_t shm_cpid;
 	pid_t shm_lpid;
 	unsigned long shm_nattch;
 	unsigned long __pad1;
 	unsigned long __pad2;
+	time_t shm_atime;
+	time_t shm_dtime;
+	time_t shm_ctime;
 };
 
 struct shminfo {
diff --git a/lib/libc/musl/arch/powerpc/bits/signal.h b/lib/libc/musl/arch/powerpc/bits/signal.h
index 06efb11cf2..c1bf3caf34 100644
--- a/lib/libc/musl/arch/powerpc/bits/signal.h
+++ b/lib/libc/musl/arch/powerpc/bits/signal.h
@@ -28,7 +28,7 @@ struct sigcontext {
 	int signal;
 	unsigned long handler;
 	unsigned long oldmask;
-	void *regs;
+	struct pt_regs *regs;
 };
 
 typedef struct {
diff --git a/lib/libc/musl/arch/powerpc/bits/socket.h b/lib/libc/musl/arch/powerpc/bits/socket.h
index a94b8bdb8c..b19ed42bfa 100644
--- a/lib/libc/musl/arch/powerpc/bits/socket.h
+++ b/lib/libc/musl/arch/powerpc/bits/socket.h
@@ -1,19 +1,3 @@
-struct msghdr {
-	void *msg_name;
-	socklen_t msg_namelen;
-	struct iovec *msg_iov;
-	int msg_iovlen;
-	void *msg_control;
-	socklen_t msg_controllen;
-	int msg_flags;
-};
-
-struct cmsghdr {
-	socklen_t cmsg_len;
-	int cmsg_level;
-	int cmsg_type;
-};
-
 #define SO_DEBUG        1
 #define SO_REUSEADDR    2
 #define SO_TYPE         3
@@ -31,8 +15,6 @@ struct cmsghdr {
 #define SO_REUSEPORT    15
 #define SO_RCVLOWAT     16
 #define SO_SNDLOWAT     17
-#define SO_RCVTIMEO     18
-#define SO_SNDTIMEO     19
 #define SO_PASSCRED     20
 #define SO_PEERCRED     21
 #define SO_ACCEPTCONN   30
diff --git a/lib/libc/musl/arch/powerpc/bits/stat.h b/lib/libc/musl/arch/powerpc/bits/stat.h
index dcb896fd5f..585d98e908 100644
--- a/lib/libc/musl/arch/powerpc/bits/stat.h
+++ b/lib/libc/musl/arch/powerpc/bits/stat.h
@@ -13,8 +13,12 @@ struct stat {
 	off_t st_size;
 	blksize_t st_blksize;
 	blkcnt_t st_blocks;
+	struct {
+		long tv_sec;
+		long tv_nsec;
+	} __st_atim32, __st_mtim32, __st_ctim32;
+	unsigned __unused[2];
 	struct timespec st_atim;
 	struct timespec st_mtim;
 	struct timespec st_ctim;
-	unsigned __unused[2];
 };
diff --git a/lib/libc/musl/arch/powerpc/bits/syscall.h.in b/lib/libc/musl/arch/powerpc/bits/syscall.h.in
index adcf63dbbc..8d4f79b524 100644
--- a/lib/libc/musl/arch/powerpc/bits/syscall.h.in
+++ b/lib/libc/musl/arch/powerpc/bits/syscall.h.in
@@ -76,8 +76,8 @@
 #define __NR_setrlimit               75
 #define __NR_getrlimit               76
 #define __NR_getrusage               77
-#define __NR_gettimeofday            78
-#define __NR_settimeofday            79
+#define __NR_gettimeofday_time32            78
+#define __NR_settimeofday_time32            79
 #define __NR_getgroups               80
 #define __NR_setgroups               81
 #define __NR_select                  82
@@ -238,14 +238,14 @@
 #define __NR_epoll_wait             238
 #define __NR_remap_file_pages       239
 #define __NR_timer_create           240
-#define __NR_timer_settime          241
-#define __NR_timer_gettime          242
+#define __NR_timer_settime32          241
+#define __NR_timer_gettime32          242
 #define __NR_timer_getoverrun       243
 #define __NR_timer_delete           244
-#define __NR_clock_settime          245
-#define __NR_clock_gettime          246
-#define __NR_clock_getres           247
-#define __NR_clock_nanosleep        248
+#define __NR_clock_settime32          245
+#define __NR_clock_gettime32          246
+#define __NR_clock_getres_time32           247
+#define __NR_clock_nanosleep_time32        248
 #define __NR_swapcontext            249
 #define __NR_tgkill                 250
 #define __NR_utimes                 251
@@ -307,8 +307,8 @@
 #define __NR_sync_file_range2	308
 #define __NR_fallocate		309
 #define __NR_subpage_prot		310
-#define __NR_timerfd_settime	311
-#define __NR_timerfd_gettime	312
+#define __NR_timerfd_settime32	311
+#define __NR_timerfd_gettime32	312
 #define __NR_signalfd4		313
 #define __NR_eventfd2		314
 #define __NR_epoll_create1	315
@@ -413,4 +413,6 @@
 #define __NR_fsconfig		431
 #define __NR_fsmount		432
 #define __NR_fspick		433
+#define __NR_pidfd_open		434
+#define __NR_clone3		435
 
diff --git a/lib/libc/musl/arch/powerpc64/bits/alltypes.h.in b/lib/libc/musl/arch/powerpc64/bits/alltypes.h.in
index 5b205851f1..143ffa8d25 100644
--- a/lib/libc/musl/arch/powerpc64/bits/alltypes.h.in
+++ b/lib/libc/musl/arch/powerpc64/bits/alltypes.h.in
@@ -2,8 +2,13 @@
 #define _Int64 long
 #define _Reg long
 
-TYPEDEF __builtin_va_list va_list;
-TYPEDEF __builtin_va_list __isoc_va_list;
+#if __BIG_ENDIAN__
+#define __BYTE_ORDER 4321
+#else
+#define __BYTE_ORDER 1234
+#endif
+
+#define __LONG_MAX 0x7fffffffffffffffL
 
 #ifndef __cplusplus
 TYPEDEF int wchar_t;
@@ -13,14 +18,3 @@ TYPEDEF float float_t;
 TYPEDEF double double_t;
 
 TYPEDEF struct { long long __ll; long double __ld; } max_align_t;
-
-TYPEDEF long time_t;
-TYPEDEF long suseconds_t;
-
-TYPEDEF struct { union { int __i[14]; volatile int __vi[14]; unsigned long __s[7]; } __u; } pthread_attr_t;
-TYPEDEF struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } pthread_mutex_t;
-TYPEDEF struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } mtx_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } pthread_cond_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } cnd_t;
-TYPEDEF struct { union { int __i[14]; volatile int __vi[14]; void *__p[7]; } __u; } pthread_rwlock_t;
-TYPEDEF struct { union { int __i[8]; volatile int __vi[8]; void *__p[4]; } __u; } pthread_barrier_t;
diff --git a/lib/libc/musl/arch/powerpc64/bits/endian.h b/lib/libc/musl/arch/powerpc64/bits/endian.h
deleted file mode 100644
index 2016cb2074..0000000000
--- a/lib/libc/musl/arch/powerpc64/bits/endian.h
+++ /dev/null
@@ -1,5 +0,0 @@
-#if __BIG_ENDIAN__
-#define __BYTE_ORDER __BIG_ENDIAN
-#else
-#define __BYTE_ORDER __LITTLE_ENDIAN
-#endif
diff --git a/lib/libc/musl/arch/powerpc64/bits/limits.h b/lib/libc/musl/arch/powerpc64/bits/limits.h
deleted file mode 100644
index 0226588c3d..0000000000
--- a/lib/libc/musl/arch/powerpc64/bits/limits.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-#define LONG_BIT 64
-#endif
-
-#define LONG_MAX  0x7fffffffffffffffL
-#define LLONG_MAX  0x7fffffffffffffffLL
diff --git a/lib/libc/musl/arch/powerpc64/bits/signal.h b/lib/libc/musl/arch/powerpc64/bits/signal.h
index 2cc0604c5e..d5493b1856 100644
--- a/lib/libc/musl/arch/powerpc64/bits/signal.h
+++ b/lib/libc/musl/arch/powerpc64/bits/signal.h
@@ -9,11 +9,7 @@
 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
 
 typedef unsigned long greg_t, gregset_t[48];
-
-typedef struct {
-	double fpregs[32];
-	double fpscr;
-} fpregset_t;
+typedef double fpregset_t[33];
 
 typedef struct {
 #ifdef __GNUC__
@@ -36,7 +32,7 @@ typedef struct sigcontext {
 	int _pad0;
 	unsigned long handler;
 	unsigned long oldmask;
-	void *regs;
+	struct pt_regs *regs;
 	gregset_t gp_regs;
 	fpregset_t fp_regs;
 	vrregset_t *v_regs;
diff --git a/lib/libc/musl/arch/powerpc64/bits/socket.h b/lib/libc/musl/arch/powerpc64/bits/socket.h
index 0f3c9aac90..557e324fde 100644
--- a/lib/libc/musl/arch/powerpc64/bits/socket.h
+++ b/lib/libc/musl/arch/powerpc64/bits/socket.h
@@ -1,37 +1,3 @@
-#include <endian.h>
-
-struct msghdr {
-	void *msg_name;
-	socklen_t msg_namelen;
-	struct iovec *msg_iov;
-#if __BYTE_ORDER == __BIG_ENDIAN
-	int __pad1, msg_iovlen;
-#else
-	int msg_iovlen, __pad1;
-#endif
-	void *msg_control;
-#if __BYTE_ORDER == __BIG_ENDIAN
-	int __pad2;
-	socklen_t msg_controllen;
-#else
-	socklen_t msg_controllen;
-	int __pad2;
-#endif
-	int msg_flags;
-};
-
-struct cmsghdr {
-#if __BYTE_ORDER == __BIG_ENDIAN
-	int __pad1;
-	socklen_t cmsg_len;
-#else
-	socklen_t cmsg_len;
-	int __pad1;
-#endif
-	int cmsg_level;
-	int cmsg_type;
-};
-
 #define SO_DEBUG        1
 #define SO_REUSEADDR    2
 #define SO_TYPE         3
diff --git a/lib/libc/musl/arch/powerpc64/bits/syscall.h.in b/lib/libc/musl/arch/powerpc64/bits/syscall.h.in
index 32545b3940..b935864c41 100644
--- a/lib/libc/musl/arch/powerpc64/bits/syscall.h.in
+++ b/lib/libc/musl/arch/powerpc64/bits/syscall.h.in
@@ -385,4 +385,6 @@
 #define __NR_fsconfig		431
 #define __NR_fsmount		432
 #define __NR_fspick		433
+#define __NR_pidfd_open		434
+#define __NR_clone3		435
 
diff --git a/lib/libc/musl/arch/powerpc64/reloc.h b/lib/libc/musl/arch/powerpc64/reloc.h
index 5bdaeede54..2f1bba059f 100644
--- a/lib/libc/musl/arch/powerpc64/reloc.h
+++ b/lib/libc/musl/arch/powerpc64/reloc.h
@@ -1,5 +1,3 @@
-#include <endian.h>
-
 #if __BYTE_ORDER == __LITTLE_ENDIAN
 #define ENDIAN_SUFFIX "le"
 #else
diff --git a/lib/libc/musl/arch/riscv64/atomic_arch.h b/lib/libc/musl/arch/riscv64/atomic_arch.h
index 41ad4d0490..0c38258868 100644
--- a/lib/libc/musl/arch/riscv64/atomic_arch.h
+++ b/lib/libc/musl/arch/riscv64/atomic_arch.h
@@ -15,7 +15,7 @@ static inline int a_cas(volatile int *p, int t, int s)
 		"	bnez %1, 1b\n"
 		"1:"
 		: "=&r"(old), "=&r"(tmp)
-		: "r"(p), "r"(t), "r"(s)
+		: "r"(p), "r"((long)t), "r"((long)s)
 		: "memory");
 	return old;
 }
diff --git a/lib/libc/musl/arch/riscv64/bits/alltypes.h.in b/lib/libc/musl/arch/riscv64/bits/alltypes.h.in
index ae9ba41daf..4579d1740b 100644
--- a/lib/libc/musl/arch/riscv64/bits/alltypes.h.in
+++ b/lib/libc/musl/arch/riscv64/bits/alltypes.h.in
@@ -2,8 +2,8 @@
 #define _Int64 long
 #define _Reg long
 
-TYPEDEF __builtin_va_list va_list;
-TYPEDEF __builtin_va_list __isoc_va_list;
+#define __BYTE_ORDER 1234
+#define __LONG_MAX 0x7fffffffffffffffL
 
 #ifndef __cplusplus
 TYPEDEF int wchar_t;
@@ -16,14 +16,3 @@ TYPEDEF float float_t;
 TYPEDEF double double_t;
 
 TYPEDEF struct { long long __ll; long double __ld; } max_align_t;
-
-TYPEDEF long time_t;
-TYPEDEF long suseconds_t;
-
-TYPEDEF struct { union { int __i[14]; volatile int __vi[14]; unsigned long __s[7]; } __u; } pthread_attr_t;
-TYPEDEF struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } pthread_mutex_t;
-TYPEDEF struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } mtx_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } pthread_cond_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } cnd_t;
-TYPEDEF struct { union { int __i[14]; volatile int __vi[14]; void *__p[7]; } __u; } pthread_rwlock_t;
-TYPEDEF struct { union { int __i[8]; volatile int __vi[8]; void *__p[4]; } __u; } pthread_barrier_t;
diff --git a/lib/libc/musl/arch/riscv64/bits/endian.h b/lib/libc/musl/arch/riscv64/bits/endian.h
deleted file mode 100644
index 172c338f50..0000000000
--- a/lib/libc/musl/arch/riscv64/bits/endian.h
+++ /dev/null
@@ -1 +0,0 @@
-#define __BYTE_ORDER __LITTLE_ENDIAN
diff --git a/lib/libc/musl/arch/riscv64/bits/limits.h b/lib/libc/musl/arch/riscv64/bits/limits.h
deleted file mode 100644
index 0226588c3d..0000000000
--- a/lib/libc/musl/arch/riscv64/bits/limits.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-#define LONG_BIT 64
-#endif
-
-#define LONG_MAX  0x7fffffffffffffffL
-#define LLONG_MAX  0x7fffffffffffffffLL
diff --git a/lib/libc/musl/arch/riscv64/bits/reg.h b/lib/libc/musl/arch/riscv64/bits/reg.h
index c800788c3f..2633f39d77 100644
--- a/lib/libc/musl/arch/riscv64/bits/reg.h
+++ b/lib/libc/musl/arch/riscv64/bits/reg.h
@@ -1,8 +1,2 @@
 #undef __WORDSIZE
 #define __WORDSIZE 64
-#define REG_PC 0
-#define REG_RA 1
-#define REG_SP 2
-#define REG_TP 4
-#define REG_S0 8
-#define REG_A0 10
diff --git a/lib/libc/musl/arch/riscv64/bits/signal.h b/lib/libc/musl/arch/riscv64/bits/signal.h
index 2ff4be302c..b006334f78 100644
--- a/lib/libc/musl/arch/riscv64/bits/signal.h
+++ b/lib/libc/musl/arch/riscv64/bits/signal.h
@@ -35,6 +35,15 @@ typedef struct mcontext_t {
 	union __riscv_mc_fp_state __fpregs;
 } mcontext_t;
 
+#if defined(_GNU_SOURCE)
+#define REG_PC 0
+#define REG_RA 1
+#define REG_SP 2
+#define REG_TP 4
+#define REG_S0 8
+#define REG_A0 10
+#endif
+
 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
 typedef unsigned long greg_t;
 typedef unsigned long gregset_t[32];
diff --git a/lib/libc/musl/arch/riscv64/bits/socket.h b/lib/libc/musl/arch/riscv64/bits/socket.h
deleted file mode 100644
index aae537d343..0000000000
--- a/lib/libc/musl/arch/riscv64/bits/socket.h
+++ /dev/null
@@ -1,19 +0,0 @@
-#include <endian.h>
-
-struct msghdr {
-	void *msg_name;
-	socklen_t msg_namelen;
-	struct iovec *msg_iov;
-	int msg_iovlen, __pad1;
-	void *msg_control;
-	socklen_t msg_controllen;
-	int __pad2;
-	int msg_flags;
-};
-
-struct cmsghdr {
-	socklen_t cmsg_len;
-	int __pad1;
-	int cmsg_level;
-	int cmsg_type;
-};
diff --git a/lib/libc/musl/arch/riscv64/bits/syscall.h.in b/lib/libc/musl/arch/riscv64/bits/syscall.h.in
index 1db70cfbf5..0043eeba3c 100644
--- a/lib/libc/musl/arch/riscv64/bits/syscall.h.in
+++ b/lib/libc/musl/arch/riscv64/bits/syscall.h.in
@@ -287,6 +287,8 @@
 #define __NR_fsconfig		431
 #define __NR_fsmount		432
 #define __NR_fspick		433
+#define __NR_pidfd_open		434
+#define __NR_clone3		435
 
 #define __NR_sysriscv __NR_arch_specific_syscall
 #define __NR_riscv_flush_icache (__NR_sysriscv + 15)
diff --git a/lib/libc/musl/arch/s390x/bits/alltypes.h.in b/lib/libc/musl/arch/s390x/bits/alltypes.h.in
index 1a83846209..15d18c8f4a 100644
--- a/lib/libc/musl/arch/s390x/bits/alltypes.h.in
+++ b/lib/libc/musl/arch/s390x/bits/alltypes.h.in
@@ -2,8 +2,8 @@
 #define _Int64 long
 #define _Reg long
 
-TYPEDEF __builtin_va_list va_list;
-TYPEDEF __builtin_va_list __isoc_va_list;
+#define __BYTE_ORDER 4321
+#define __LONG_MAX 0x7fffffffffffffffL
 
 #ifndef __cplusplus
 TYPEDEF int wchar_t;
@@ -13,14 +13,3 @@ TYPEDEF double float_t;
 TYPEDEF double double_t;
 
 TYPEDEF struct { long long __ll; long double __ld; } max_align_t;
-
-TYPEDEF long time_t;
-TYPEDEF long suseconds_t;
-
-TYPEDEF struct { union { int __i[14]; volatile int __vi[14]; unsigned long __s[7]; } __u; } pthread_attr_t;
-TYPEDEF struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } pthread_mutex_t;
-TYPEDEF struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } mtx_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } pthread_cond_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } cnd_t;
-TYPEDEF struct { union { int __i[14]; volatile int __vi[14]; void *__p[7]; } __u; } pthread_rwlock_t;
-TYPEDEF struct { union { int __i[8]; volatile int __vi[8]; void *__p[4]; } __u; } pthread_barrier_t;
diff --git a/lib/libc/musl/arch/s390x/bits/endian.h b/lib/libc/musl/arch/s390x/bits/endian.h
deleted file mode 100644
index ef074b776e..0000000000
--- a/lib/libc/musl/arch/s390x/bits/endian.h
+++ /dev/null
@@ -1 +0,0 @@
-#define __BYTE_ORDER __BIG_ENDIAN
diff --git a/lib/libc/musl/arch/s390x/bits/limits.h b/lib/libc/musl/arch/s390x/bits/limits.h
index 86ef7663fd..07743b6fd6 100644
--- a/lib/libc/musl/arch/s390x/bits/limits.h
+++ b/lib/libc/musl/arch/s390x/bits/limits.h
@@ -1,8 +1 @@
-#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
 #define PAGESIZE 4096
-#define LONG_BIT 64
-#endif
-
-#define LONG_MAX  0x7fffffffffffffffL
-#define LLONG_MAX  0x7fffffffffffffffLL
diff --git a/lib/libc/musl/arch/s390x/bits/socket.h b/lib/libc/musl/arch/s390x/bits/socket.h
deleted file mode 100644
index bd4b20c429..0000000000
--- a/lib/libc/musl/arch/s390x/bits/socket.h
+++ /dev/null
@@ -1,17 +0,0 @@
-struct msghdr {
-	void *msg_name;
-	socklen_t msg_namelen;
-	struct iovec *msg_iov;
-	int __pad1, msg_iovlen;
-	void *msg_control;
-	int __pad2;
-	socklen_t msg_controllen;
-	int msg_flags;
-};
-
-struct cmsghdr {
-	int __pad1;
-	socklen_t cmsg_len;
-	int cmsg_level;
-	int cmsg_type;
-};
diff --git a/lib/libc/musl/arch/s390x/bits/syscall.h.in b/lib/libc/musl/arch/s390x/bits/syscall.h.in
index c4c70474ef..e89f378299 100644
--- a/lib/libc/musl/arch/s390x/bits/syscall.h.in
+++ b/lib/libc/musl/arch/s390x/bits/syscall.h.in
@@ -350,4 +350,6 @@
 #define __NR_fsconfig		431
 #define __NR_fsmount		432
 #define __NR_fspick		433
+#define __NR_pidfd_open		434
+#define __NR_clone3		435
 
diff --git a/lib/libc/musl/arch/s390x/reloc.h b/lib/libc/musl/arch/s390x/reloc.h
index a238dc654c..6e5c1fb876 100644
--- a/lib/libc/musl/arch/s390x/reloc.h
+++ b/lib/libc/musl/arch/s390x/reloc.h
@@ -1,5 +1,3 @@
-#include <endian.h>
-
 #define LDSO_ARCH "s390x"
 
 #define REL_SYMBOLIC    R_390_64
diff --git a/lib/libc/musl/arch/x86_64/bits/alltypes.h.in b/lib/libc/musl/arch/x86_64/bits/alltypes.h.in
index dc551d4720..5cd8a2997f 100644
--- a/lib/libc/musl/arch/x86_64/bits/alltypes.h.in
+++ b/lib/libc/musl/arch/x86_64/bits/alltypes.h.in
@@ -2,8 +2,8 @@
 #define _Int64 long
 #define _Reg long
 
-TYPEDEF __builtin_va_list va_list;
-TYPEDEF __builtin_va_list __isoc_va_list;
+#define __BYTE_ORDER 1234
+#define __LONG_MAX 0x7fffffffffffffffL
 
 #ifndef __cplusplus
 TYPEDEF int wchar_t;
@@ -18,14 +18,3 @@ TYPEDEF double double_t;
 #endif
 
 TYPEDEF struct { long long __ll; long double __ld; } max_align_t;
-
-TYPEDEF long time_t;
-TYPEDEF long suseconds_t;
-
-TYPEDEF struct { union { int __i[14]; volatile int __vi[14]; unsigned long __s[7]; } __u; } pthread_attr_t;
-TYPEDEF struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } pthread_mutex_t;
-TYPEDEF struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } mtx_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } pthread_cond_t;
-TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } cnd_t;
-TYPEDEF struct { union { int __i[14]; volatile int __vi[14]; void *__p[7]; } __u; } pthread_rwlock_t;
-TYPEDEF struct { union { int __i[8]; volatile int __vi[8]; void *__p[4]; } __u; } pthread_barrier_t;
diff --git a/lib/libc/musl/arch/x86_64/bits/endian.h b/lib/libc/musl/arch/x86_64/bits/endian.h
deleted file mode 100644
index 172c338f50..0000000000
--- a/lib/libc/musl/arch/x86_64/bits/endian.h
+++ /dev/null
@@ -1 +0,0 @@
-#define __BYTE_ORDER __LITTLE_ENDIAN
diff --git a/lib/libc/musl/arch/x86_64/bits/limits.h b/lib/libc/musl/arch/x86_64/bits/limits.h
index 86ef7663fd..07743b6fd6 100644
--- a/lib/libc/musl/arch/x86_64/bits/limits.h
+++ b/lib/libc/musl/arch/x86_64/bits/limits.h
@@ -1,8 +1 @@
-#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
 #define PAGESIZE 4096
-#define LONG_BIT 64
-#endif
-
-#define LONG_MAX  0x7fffffffffffffffL
-#define LLONG_MAX  0x7fffffffffffffffLL
diff --git a/lib/libc/musl/arch/x86_64/bits/socket.h b/lib/libc/musl/arch/x86_64/bits/socket.h
deleted file mode 100644
index a4c89f3d7a..0000000000
--- a/lib/libc/musl/arch/x86_64/bits/socket.h
+++ /dev/null
@@ -1,16 +0,0 @@
-struct msghdr {
-	void *msg_name;
-	socklen_t msg_namelen;
-	struct iovec *msg_iov;
-	int msg_iovlen, __pad1;
-	void *msg_control;
-	socklen_t msg_controllen, __pad2;
-	int msg_flags;
-};
-
-struct cmsghdr {
-	socklen_t cmsg_len;
-	int __pad1;
-	int cmsg_level;
-	int cmsg_type;
-};
diff --git a/lib/libc/musl/arch/x86_64/bits/syscall.h.in b/lib/libc/musl/arch/x86_64/bits/syscall.h.in
index 2d4634f683..6a646ad346 100644
--- a/lib/libc/musl/arch/x86_64/bits/syscall.h.in
+++ b/lib/libc/musl/arch/x86_64/bits/syscall.h.in
@@ -343,4 +343,6 @@
 #define __NR_fsconfig		431
 #define __NR_fsmount		432
 #define __NR_fspick		433
+#define __NR_pidfd_open		434
+#define __NR_clone3		435
 
diff --git a/lib/libc/musl/compat/time32/__xstat.c b/lib/libc/musl/compat/time32/__xstat.c
new file mode 100644
index 0000000000..acfbd3cc52
--- /dev/null
+++ b/lib/libc/musl/compat/time32/__xstat.c
@@ -0,0 +1,24 @@
+#include "time32.h"
+#include <sys/stat.h>
+
+struct stat32;
+
+int __fxstat64(int ver, int fd, struct stat32 *buf)
+{
+	return __fstat_time32(fd, buf);
+}
+
+int __fxstatat64(int ver, int fd, const char *path, struct stat32 *buf, int flag)
+{
+	return __fstatat_time32(fd, path, buf, flag);
+}
+
+int __lxstat64(int ver, const char *path, struct stat32 *buf)
+{
+	return __lstat_time32(path, buf);
+}
+
+int __xstat64(int ver, const char *path, struct stat32 *buf)
+{
+	return __stat_time32(path, buf);
+}
diff --git a/lib/libc/musl/compat/time32/adjtime32.c b/lib/libc/musl/compat/time32/adjtime32.c
new file mode 100644
index 0000000000..b0042c6317
--- /dev/null
+++ b/lib/libc/musl/compat/time32/adjtime32.c
@@ -0,0 +1,21 @@
+#define _GNU_SOURCE
+#include "time32.h"
+#include <time.h>
+#include <sys/time.h>
+#include <sys/timex.h>
+
+int __adjtime32(const struct timeval32 *in32, struct timeval32 *out32)
+{
+	struct timeval out;
+	int r = adjtime((&(struct timeval){
+		.tv_sec = in32->tv_sec,
+		.tv_usec = in32->tv_usec}), &out);
+	if (r) return r;
+	/* We can't range-check the result because success was already
+	 * committed by the above call. */
+	if (out32) {
+		out32->tv_sec = out.tv_sec;
+		out32->tv_usec = out.tv_usec;
+	}
+	return r;
+}
diff --git a/lib/libc/musl/compat/time32/adjtimex_time32.c b/lib/libc/musl/compat/time32/adjtimex_time32.c
new file mode 100644
index 0000000000..9c6f190abe
--- /dev/null
+++ b/lib/libc/musl/compat/time32/adjtimex_time32.c
@@ -0,0 +1,10 @@
+#include "time32.h"
+#include <time.h>
+#include <sys/timex.h>
+
+struct timex32;
+
+int __adjtimex_time32(struct timex32 *tx32)
+{
+	return __clock_adjtime32(CLOCK_REALTIME, tx32);
+}
diff --git a/lib/libc/musl/compat/time32/aio_suspend_time32.c b/lib/libc/musl/compat/time32/aio_suspend_time32.c
new file mode 100644
index 0000000000..ed5119bd7d
--- /dev/null
+++ b/lib/libc/musl/compat/time32/aio_suspend_time32.c
@@ -0,0 +1,11 @@
+#include "time32.h"
+#include <time.h>
+#include <aio.h>
+
+int __aio_suspend_time32(const struct aiocb *const cbs[], int cnt, const struct timespec32 *ts32)
+{
+	return aio_suspend(cbs, cnt, ts32 ? (&(struct timespec){
+		.tv_sec = ts32->tv_sec, .tv_nsec = ts32->tv_nsec}) : 0);
+}
+
+weak_alias(aio_suspend, aio_suspend64);
diff --git a/lib/libc/musl/compat/time32/clock_adjtime32.c b/lib/libc/musl/compat/time32/clock_adjtime32.c
new file mode 100644
index 0000000000..5a25b8ac02
--- /dev/null
+++ b/lib/libc/musl/compat/time32/clock_adjtime32.c
@@ -0,0 +1,70 @@
+#include "time32.h"
+#include <time.h>
+#include <sys/time.h>
+#include <sys/timex.h>
+#include <string.h>
+#include <stddef.h>
+
+struct timex32 {
+	unsigned modes;
+	long offset, freq, maxerror, esterror;
+	int status;
+	long constant, precision, tolerance;
+	struct timeval32 time;
+	long tick, ppsfreq, jitter;
+	int shift;
+	long stabil, jitcnt, calcnt, errcnt, stbcnt;
+	int tai;
+	int __padding[11];
+};
+
+int __clock_adjtime32(clockid_t clock_id, struct timex32 *tx32)
+{
+	struct timex utx = {
+		.modes = tx32->modes,
+		.offset = tx32->offset,
+		.freq = tx32->freq,
+		.maxerror = tx32->maxerror,
+		.esterror = tx32->esterror,
+		.status = tx32->status,
+		.constant = tx32->constant,
+		.precision = tx32->precision,
+		.tolerance = tx32->tolerance,
+		.time.tv_sec = tx32->time.tv_sec,
+		.time.tv_usec = tx32->time.tv_usec,
+		.tick = tx32->tick,
+		.ppsfreq = tx32->ppsfreq,
+		.jitter = tx32->jitter,
+		.shift = tx32->shift,
+		.stabil = tx32->stabil,
+		.jitcnt = tx32->jitcnt,
+		.calcnt = tx32->calcnt,
+		.errcnt = tx32->errcnt,
+		.stbcnt = tx32->stbcnt,
+		.tai = tx32->tai,
+	};
+	int r = clock_adjtime(clock_id, &utx);
+	if (r<0) return r;
+	tx32->modes = utx.modes;
+	tx32->offset = utx.offset;
+	tx32->freq = utx.freq;
+	tx32->maxerror = utx.maxerror;
+	tx32->esterror = utx.esterror;
+	tx32->status = utx.status;
+	tx32->constant = utx.constant;
+	tx32->precision = utx.precision;
+	tx32->tolerance = utx.tolerance;
+	tx32->time.tv_sec = utx.time.tv_sec;
+	tx32->time.tv_usec = utx.time.tv_usec;
+	tx32->tick = utx.tick;
+	tx32->ppsfreq = utx.ppsfreq;
+	tx32->jitter = utx.jitter;
+	tx32->shift = utx.shift;
+	tx32->stabil = utx.stabil;
+	tx32->jitcnt = utx.jitcnt;
+	tx32->calcnt = utx.calcnt;
+	tx32->errcnt = utx.errcnt;
+	tx32->stbcnt = utx.stbcnt;
+	tx32->tai = utx.tai;
+	return r;
+}
diff --git a/lib/libc/musl/compat/time32/clock_getres_time32.c b/lib/libc/musl/compat/time32/clock_getres_time32.c
new file mode 100644
index 0000000000..47a24c1350
--- /dev/null
+++ b/lib/libc/musl/compat/time32/clock_getres_time32.c
@@ -0,0 +1,13 @@
+#include "time32.h"
+#include <time.h>
+
+int __clock_getres_time32(clockid_t clk, struct timespec32 *ts32)
+{
+	struct timespec ts;
+	int r = clock_getres(clk, &ts);
+	if (!r && ts32) {
+		ts32->tv_sec = ts.tv_sec;
+		ts32->tv_nsec = ts.tv_nsec;
+	}
+	return r;
+}
diff --git a/lib/libc/musl/compat/time32/clock_gettime32.c b/lib/libc/musl/compat/time32/clock_gettime32.c
new file mode 100644
index 0000000000..0cac7bbdf6
--- /dev/null
+++ b/lib/libc/musl/compat/time32/clock_gettime32.c
@@ -0,0 +1,18 @@
+#include "time32.h"
+#include <time.h>
+#include <errno.h>
+#include <stdint.h>
+
+int __clock_gettime32(clockid_t clk, struct timespec32 *ts32)
+{
+	struct timespec ts;
+	int r = clock_gettime(clk, &ts);
+	if (r) return r;
+	if (ts.tv_sec < INT32_MIN || ts.tv_sec > INT32_MAX) {
+		errno = EOVERFLOW;
+		return -1;
+	}
+	ts32->tv_sec = ts.tv_sec;
+	ts32->tv_nsec = ts.tv_nsec;
+	return 0;
+}
diff --git a/lib/libc/musl/compat/time32/clock_nanosleep_time32.c b/lib/libc/musl/compat/time32/clock_nanosleep_time32.c
new file mode 100644
index 0000000000..91ef067d02
--- /dev/null
+++ b/lib/libc/musl/compat/time32/clock_nanosleep_time32.c
@@ -0,0 +1,15 @@
+#include "time32.h"
+#include <time.h>
+#include <errno.h>
+
+int __clock_nanosleep_time32(clockid_t clk, int flags, const struct timespec32 *req32, struct timespec32 *rem32)
+{
+	struct timespec rem;
+	int ret = clock_nanosleep(clk, flags, (&(struct timespec){
+		.tv_sec = req32->tv_sec, .tv_nsec = req32->tv_nsec}), &rem);
+	if (ret==EINTR && rem32 && !(flags & TIMER_ABSTIME)) {
+		rem32->tv_sec = rem.tv_sec;
+		rem32->tv_nsec = rem.tv_nsec;
+	}
+	return ret;
+}
diff --git a/lib/libc/musl/compat/time32/clock_settime32.c b/lib/libc/musl/compat/time32/clock_settime32.c
new file mode 100644
index 0000000000..7ca4f0e9c7
--- /dev/null
+++ b/lib/libc/musl/compat/time32/clock_settime32.c
@@ -0,0 +1,9 @@
+#include "time32.h"
+#include <time.h>
+
+int __clock_settime32(clockid_t clk, const struct timespec32 *ts32)
+{
+	return clock_settime(clk, (&(struct timespec){
+		.tv_sec = ts32->tv_sec,
+		.tv_nsec = ts32->tv_nsec}));
+}
diff --git a/lib/libc/musl/compat/time32/cnd_timedwait_time32.c b/lib/libc/musl/compat/time32/cnd_timedwait_time32.c
new file mode 100644
index 0000000000..314251d1c1
--- /dev/null
+++ b/lib/libc/musl/compat/time32/cnd_timedwait_time32.c
@@ -0,0 +1,9 @@
+#include "time32.h"
+#include <time.h>
+#include <threads.h>
+
+int __cnd_timedwait_time32(cnd_t *restrict c, mtx_t *restrict m, const struct timespec32 *restrict ts32)
+{
+	return cnd_timedwait(c, m, ts32 ? (&(struct timespec){
+		.tv_sec = ts32->tv_sec, .tv_nsec = ts32->tv_nsec}) : 0);
+}
diff --git a/lib/libc/musl/compat/time32/ctime32.c b/lib/libc/musl/compat/time32/ctime32.c
new file mode 100644
index 0000000000..a057274e15
--- /dev/null
+++ b/lib/libc/musl/compat/time32/ctime32.c
@@ -0,0 +1,7 @@
+#include "time32.h"
+#include <time.h>
+
+char *__ctime32(time32_t *t)
+{
+	return ctime(&(time_t){*t});
+}
diff --git a/lib/libc/musl/compat/time32/ctime32_r.c b/lib/libc/musl/compat/time32/ctime32_r.c
new file mode 100644
index 0000000000..e1ad2e283a
--- /dev/null
+++ b/lib/libc/musl/compat/time32/ctime32_r.c
@@ -0,0 +1,7 @@
+#include "time32.h"
+#include <time.h>
+
+char *__ctime32_r(time32_t *t, char *buf)
+{
+	return ctime_r(&(time_t){*t}, buf);
+}
diff --git a/lib/libc/musl/compat/time32/difftime32.c b/lib/libc/musl/compat/time32/difftime32.c
new file mode 100644
index 0000000000..5950943a00
--- /dev/null
+++ b/lib/libc/musl/compat/time32/difftime32.c
@@ -0,0 +1,7 @@
+#include "time32.h"
+#include <time.h>
+
+double __difftime32(time32_t t1, time32_t t2)
+{
+	return difftime(t1, t2);
+}
diff --git a/lib/libc/musl/compat/time32/fstat_time32.c b/lib/libc/musl/compat/time32/fstat_time32.c
new file mode 100644
index 0000000000..3e08439887
--- /dev/null
+++ b/lib/libc/musl/compat/time32/fstat_time32.c
@@ -0,0 +1,17 @@
+#include "time32.h"
+#include <time.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <stddef.h>
+
+struct stat32;
+
+int __fstat_time32(int fd, struct stat32 *restrict st32)
+{
+	struct stat st;
+	int r = fstat(fd, &st);
+	if (!r) memcpy(st32, &st, offsetof(struct stat, st_atim));
+	return r;
+}
+
+weak_alias(fstat, fstat64);
diff --git a/lib/libc/musl/compat/time32/fstatat_time32.c b/lib/libc/musl/compat/time32/fstatat_time32.c
new file mode 100644
index 0000000000..85dcb008ed
--- /dev/null
+++ b/lib/libc/musl/compat/time32/fstatat_time32.c
@@ -0,0 +1,17 @@
+#include "time32.h"
+#include <time.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <stddef.h>
+
+struct stat32;
+
+int __fstatat_time32(int fd, const char *restrict path, struct stat32 *restrict st32, int flag)
+{
+	struct stat st;
+	int r = fstatat(fd, path, &st, flag);
+	if (!r) memcpy(st32, &st, offsetof(struct stat, st_atim));
+	return r;
+}
+
+weak_alias(fstatat, fstatat64);
diff --git a/lib/libc/musl/compat/time32/ftime32.c b/lib/libc/musl/compat/time32/ftime32.c
new file mode 100644
index 0000000000..166a6daeb6
--- /dev/null
+++ b/lib/libc/musl/compat/time32/ftime32.c
@@ -0,0 +1,25 @@
+#include "time32.h"
+#include <sys/timeb.h>
+#include <errno.h>
+#include <stdint.h>
+
+struct timeb32 {
+	int32_t time;
+	unsigned short millitm;
+	short timezone, dstflag;
+};
+
+int __ftime32(struct timeb32 *tp)
+{
+	struct timeb tb;
+	if (ftime(&tb) < 0) return -1;
+	if (tb.time < INT32_MIN || tb.time > INT32_MAX) {
+		errno = EOVERFLOW;
+		return -1;
+	}
+	tp->time = tb.time;
+	tp->millitm = tb.millitm;
+	tp->timezone = tb.timezone;
+	tp->dstflag = tb.dstflag;
+	return 0;
+}
diff --git a/lib/libc/musl/compat/time32/futimens_time32.c b/lib/libc/musl/compat/time32/futimens_time32.c
new file mode 100644
index 0000000000..7856f176e6
--- /dev/null
+++ b/lib/libc/musl/compat/time32/futimens_time32.c
@@ -0,0 +1,10 @@
+#include "time32.h"
+#include <time.h>
+#include <sys/stat.h>
+
+int __futimens_time32(int fd, const struct timespec32 *times32)
+{
+	return futimens(fd, !times32 ? 0 : ((struct timespec[2]){
+		{.tv_sec = times32[0].tv_sec,.tv_nsec = times32[0].tv_nsec},
+		{.tv_sec = times32[1].tv_sec,.tv_nsec = times32[1].tv_nsec}}));
+}
diff --git a/lib/libc/musl/compat/time32/futimes_time32.c b/lib/libc/musl/compat/time32/futimes_time32.c
new file mode 100644
index 0000000000..f29533f12f
--- /dev/null
+++ b/lib/libc/musl/compat/time32/futimes_time32.c
@@ -0,0 +1,12 @@
+#define _GNU_SOURCE
+#include "time32.h"
+#include <time.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+
+int __futimes_time32(int fd, const struct timeval32 times32[2])
+{
+	return futimes(fd, !times32 ? 0 : ((struct timeval[2]){
+		{.tv_sec = times32[0].tv_sec,.tv_usec = times32[0].tv_usec},
+		{.tv_sec = times32[1].tv_sec,.tv_usec = times32[1].tv_usec}}));
+}
diff --git a/lib/libc/musl/compat/time32/futimesat_time32.c b/lib/libc/musl/compat/time32/futimesat_time32.c
new file mode 100644
index 0000000000..5a1295bde9
--- /dev/null
+++ b/lib/libc/musl/compat/time32/futimesat_time32.c
@@ -0,0 +1,12 @@
+#define _GNU_SOURCE
+#include "time32.h"
+#include <time.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+
+int __futimesat_time32(int dirfd, const char *pathname, const struct timeval32 times32[2])
+{
+	return futimesat(dirfd, pathname, !times32 ? 0 : ((struct timeval[2]){
+		{.tv_sec = times32[0].tv_sec,.tv_usec = times32[0].tv_usec},
+		{.tv_sec = times32[1].tv_sec,.tv_usec = times32[1].tv_usec}}));
+}
diff --git a/lib/libc/musl/compat/time32/getitimer_time32.c b/lib/libc/musl/compat/time32/getitimer_time32.c
new file mode 100644
index 0000000000..4bac4bf526
--- /dev/null
+++ b/lib/libc/musl/compat/time32/getitimer_time32.c
@@ -0,0 +1,15 @@
+#include "time32.h"
+#include <time.h>
+#include <sys/time.h>
+
+int __getitimer_time32(int which, struct itimerval32 *old32)
+{
+	struct itimerval old;
+	int r = getitimer(which, &old);
+	if (r) return r;
+	old32->it_interval.tv_sec = old.it_interval.tv_sec;
+	old32->it_interval.tv_usec = old.it_interval.tv_usec;
+	old32->it_value.tv_sec = old.it_value.tv_sec;
+	old32->it_value.tv_usec = old.it_value.tv_usec;
+	return 0;
+}
diff --git a/lib/libc/musl/compat/time32/getrusage_time32.c b/lib/libc/musl/compat/time32/getrusage_time32.c
new file mode 100644
index 0000000000..d7487dee6e
--- /dev/null
+++ b/lib/libc/musl/compat/time32/getrusage_time32.c
@@ -0,0 +1,39 @@
+#include "time32.h"
+#include <string.h>
+#include <stddef.h>
+#include <sys/resource.h>
+
+struct compat_rusage {
+	struct timeval32 ru_utime;
+	struct timeval32 ru_stime;
+	long	ru_maxrss;
+	long	ru_ixrss;
+	long	ru_idrss;
+	long	ru_isrss;
+	long	ru_minflt;
+	long	ru_majflt;
+	long	ru_nswap;
+	long	ru_inblock;
+	long	ru_oublock;
+	long	ru_msgsnd;
+	long	ru_msgrcv;
+	long	ru_nsignals;
+	long	ru_nvcsw;
+	long	ru_nivcsw;
+};
+
+int __getrusage_time32(int who, struct compat_rusage *usage)
+{
+	struct rusage ru;
+	int r = getrusage(who, &ru);
+	if (!r) {
+		usage->ru_utime.tv_sec = ru.ru_utime.tv_sec;
+		usage->ru_utime.tv_usec = ru.ru_utime.tv_usec;
+		usage->ru_stime.tv_sec = ru.ru_stime.tv_sec;
+		usage->ru_stime.tv_usec = ru.ru_stime.tv_usec;
+		memcpy(&usage->ru_maxrss, &ru.ru_maxrss,
+			sizeof(struct compat_rusage) -
+			offsetof(struct compat_rusage, ru_maxrss));
+	}
+	return r;
+}
diff --git a/lib/libc/musl/compat/time32/gettimeofday_time32.c b/lib/libc/musl/compat/time32/gettimeofday_time32.c
new file mode 100644
index 0000000000..1f3ce68e3e
--- /dev/null
+++ b/lib/libc/musl/compat/time32/gettimeofday_time32.c
@@ -0,0 +1,19 @@
+#include "time32.h"
+#include <sys/time.h>
+#include <errno.h>
+#include <stdint.h>
+
+int __gettimeofday_time32(struct timeval32 *tv32, void *tz)
+{
+	struct timeval tv;
+	if (!tv32) return 0;
+	int r = gettimeofday(&tv, 0);
+	if (r) return r;
+	if (tv.tv_sec < INT32_MIN || tv.tv_sec > INT32_MAX) {
+		errno = EOVERFLOW;
+		return -1;
+	}
+	tv32->tv_sec = tv.tv_sec;
+	tv32->tv_usec = tv.tv_usec;
+	return 0;
+}
diff --git a/lib/libc/musl/compat/time32/gmtime32.c b/lib/libc/musl/compat/time32/gmtime32.c
new file mode 100644
index 0000000000..963f0e0525
--- /dev/null
+++ b/lib/libc/musl/compat/time32/gmtime32.c
@@ -0,0 +1,7 @@
+#include "time32.h"
+#include <time.h>
+
+struct tm *__gmtime32(time32_t *t)
+{
+	return gmtime(&(time_t){*t});
+}
diff --git a/lib/libc/musl/compat/time32/gmtime32_r.c b/lib/libc/musl/compat/time32/gmtime32_r.c
new file mode 100644
index 0000000000..7d72bfb320
--- /dev/null
+++ b/lib/libc/musl/compat/time32/gmtime32_r.c
@@ -0,0 +1,7 @@
+#include "time32.h"
+#include <time.h>
+
+struct tm *__gmtime32_r(time32_t *t, struct tm *tm)
+{
+	return gmtime_r(&(time_t){*t}, tm);
+}
diff --git a/lib/libc/musl/compat/time32/localtime32.c b/lib/libc/musl/compat/time32/localtime32.c
new file mode 100644
index 0000000000..96bc303490
--- /dev/null
+++ b/lib/libc/musl/compat/time32/localtime32.c
@@ -0,0 +1,7 @@
+#include "time32.h"
+#include <time.h>
+
+struct tm *__localtime32(time32_t *t)
+{
+	return localtime(&(time_t){*t});
+}
diff --git a/lib/libc/musl/compat/time32/localtime32_r.c b/lib/libc/musl/compat/time32/localtime32_r.c
new file mode 100644
index 0000000000..633ec8293f
--- /dev/null
+++ b/lib/libc/musl/compat/time32/localtime32_r.c
@@ -0,0 +1,7 @@
+#include "time32.h"
+#include <time.h>
+
+struct tm *__localtime32_r(time32_t *t, struct tm *tm)
+{
+	return localtime_r(&(time_t){*t}, tm);
+}
diff --git a/lib/libc/musl/compat/time32/lstat_time32.c b/lib/libc/musl/compat/time32/lstat_time32.c
new file mode 100644
index 0000000000..c1257a1449
--- /dev/null
+++ b/lib/libc/musl/compat/time32/lstat_time32.c
@@ -0,0 +1,17 @@
+#include "time32.h"
+#include <time.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <stddef.h>
+
+struct stat32;
+
+int __lstat_time32(const char *restrict path, struct stat32 *restrict st32)
+{
+	struct stat st;
+	int r = lstat(path, &st);
+	if (!r) memcpy(st32, &st, offsetof(struct stat, st_atim));
+	return r;
+}
+
+weak_alias(lstat, lstat64);
diff --git a/lib/libc/musl/compat/time32/lutimes_time32.c b/lib/libc/musl/compat/time32/lutimes_time32.c
new file mode 100644
index 0000000000..7f75cd4a18
--- /dev/null
+++ b/lib/libc/musl/compat/time32/lutimes_time32.c
@@ -0,0 +1,12 @@
+#define _GNU_SOURCE
+#include "time32.h"
+#include <time.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+
+int __lutimes_time32(const char *path, const struct timeval32 times32[2])
+{
+	return lutimes(path, !times32 ? 0 : ((struct timeval[2]){
+		{.tv_sec = times32[0].tv_sec,.tv_usec = times32[0].tv_usec},
+		{.tv_sec = times32[1].tv_sec,.tv_usec = times32[1].tv_usec}}));
+}
diff --git a/lib/libc/musl/compat/time32/mktime32.c b/lib/libc/musl/compat/time32/mktime32.c
new file mode 100644
index 0000000000..e6f15d513a
--- /dev/null
+++ b/lib/libc/musl/compat/time32/mktime32.c
@@ -0,0 +1,16 @@
+#include "time32.h"
+#include <time.h>
+#include <errno.h>
+#include <stdint.h>
+
+time32_t __mktime32(struct tm *tm)
+{
+	struct tm tmp = *tm;
+	time_t t = mktime(&tmp);
+	if (t < INT32_MIN || t > INT32_MAX) {
+		errno = EOVERFLOW;
+		return -1;
+	}
+	*tm = tmp;
+	return t;
+}
diff --git a/lib/libc/musl/compat/time32/mq_timedreceive_time32.c b/lib/libc/musl/compat/time32/mq_timedreceive_time32.c
new file mode 100644
index 0000000000..211cea4ba4
--- /dev/null
+++ b/lib/libc/musl/compat/time32/mq_timedreceive_time32.c
@@ -0,0 +1,9 @@
+#include "time32.h"
+#include <mqueue.h>
+#include <time.h>
+
+ssize_t __mq_timedreceive_time32(mqd_t mqd, char *restrict msg, size_t len, unsigned *restrict prio, const struct timespec32 *restrict ts32)
+{
+	return mq_timedreceive(mqd, msg, len, prio, ts32 ? (&(struct timespec){
+		.tv_sec = ts32->tv_sec, .tv_nsec = ts32->tv_nsec}) : 0);
+}
diff --git a/lib/libc/musl/compat/time32/mq_timedsend_time32.c b/lib/libc/musl/compat/time32/mq_timedsend_time32.c
new file mode 100644
index 0000000000..93b697a7e1
--- /dev/null
+++ b/lib/libc/musl/compat/time32/mq_timedsend_time32.c
@@ -0,0 +1,9 @@
+#include "time32.h"
+#include <mqueue.h>
+#include <time.h>
+
+int __mq_timedsend_time32(mqd_t mqd, const char *msg, size_t len, unsigned prio, const struct timespec32 *ts32)
+{
+	return mq_timedsend(mqd, msg, len, prio, ts32 ? (&(struct timespec){
+		.tv_sec = ts32->tv_sec, .tv_nsec = ts32->tv_nsec}) : 0);
+}
diff --git a/lib/libc/musl/compat/time32/mtx_timedlock_time32.c b/lib/libc/musl/compat/time32/mtx_timedlock_time32.c
new file mode 100644
index 0000000000..a01f09b89d
--- /dev/null
+++ b/lib/libc/musl/compat/time32/mtx_timedlock_time32.c
@@ -0,0 +1,9 @@
+#include "time32.h"
+#include <time.h>
+#include <threads.h>
+
+int __mtx_timedlock_time32(mtx_t *restrict m, const struct timespec32 *restrict ts32)
+{
+	return mtx_timedlock(m, !ts32 ? 0 : (&(struct timespec){
+		.tv_sec = ts32->tv_sec, .tv_nsec = ts32->tv_nsec}));
+}
diff --git a/lib/libc/musl/compat/time32/nanosleep_time32.c b/lib/libc/musl/compat/time32/nanosleep_time32.c
new file mode 100644
index 0000000000..ea6bdd81b1
--- /dev/null
+++ b/lib/libc/musl/compat/time32/nanosleep_time32.c
@@ -0,0 +1,15 @@
+#include "time32.h"
+#include <time.h>
+#include <errno.h>
+
+int __nanosleep_time32(const struct timespec32 *req32, struct timespec32 *rem32)
+{
+	struct timespec rem;
+	int ret = nanosleep((&(struct timespec){
+		.tv_sec = req32->tv_sec, .tv_nsec = req32->tv_nsec}), &rem);
+	if (ret<0 && errno==EINTR && rem32) {
+		rem32->tv_sec = rem.tv_sec;
+		rem32->tv_nsec = rem.tv_nsec;
+	}
+	return ret;
+}
diff --git a/lib/libc/musl/compat/time32/ppoll_time32.c b/lib/libc/musl/compat/time32/ppoll_time32.c
new file mode 100644
index 0000000000..43b4b0df6f
--- /dev/null
+++ b/lib/libc/musl/compat/time32/ppoll_time32.c
@@ -0,0 +1,10 @@
+#include "time32.h"
+#define _GNU_SOURCE
+#include <time.h>
+#include <poll.h>
+
+int __ppoll_time32(struct pollfd *fds, nfds_t n, const struct timespec32 *ts32, const sigset_t *mask)
+{
+	return ppoll(fds, n, !ts32 ? 0 : (&(struct timespec){
+		.tv_sec = ts32->tv_sec, .tv_nsec = ts32->tv_nsec}), mask);
+}
diff --git a/lib/libc/musl/compat/time32/pselect_time32.c b/lib/libc/musl/compat/time32/pselect_time32.c
new file mode 100644
index 0000000000..ecaa8f868d
--- /dev/null
+++ b/lib/libc/musl/compat/time32/pselect_time32.c
@@ -0,0 +1,9 @@
+#include "time32.h"
+#include <time.h>
+#include <sys/select.h>
+
+int __pselect_time32(int n, fd_set *restrict rfds, fd_set *restrict wfds, fd_set *restrict efds, const struct timespec32 *restrict ts32, const sigset_t *restrict mask)
+{
+	return pselect(n, rfds, wfds, efds, !ts32 ? 0 : (&(struct timespec){
+		.tv_sec = ts32->tv_sec, .tv_nsec = ts32->tv_nsec}), mask);
+}
diff --git a/lib/libc/musl/compat/time32/pthread_cond_timedwait_time32.c b/lib/libc/musl/compat/time32/pthread_cond_timedwait_time32.c
new file mode 100644
index 0000000000..fba1f2a914
--- /dev/null
+++ b/lib/libc/musl/compat/time32/pthread_cond_timedwait_time32.c
@@ -0,0 +1,9 @@
+#include "time32.h"
+#include <time.h>
+#include <pthread.h>
+
+int __pthread_cond_timedwait_time32(pthread_cond_t *restrict c, pthread_mutex_t *restrict m, const struct timespec32 *restrict ts32)
+{
+	return pthread_cond_timedwait(c, m, !ts32 ? 0 : (&(struct timespec){
+		.tv_sec = ts32->tv_sec, .tv_nsec = ts32->tv_nsec}));
+}
diff --git a/lib/libc/musl/compat/time32/pthread_mutex_timedlock_time32.c b/lib/libc/musl/compat/time32/pthread_mutex_timedlock_time32.c
new file mode 100644
index 0000000000..2d29602cb7
--- /dev/null
+++ b/lib/libc/musl/compat/time32/pthread_mutex_timedlock_time32.c
@@ -0,0 +1,9 @@
+#include "time32.h"
+#include <time.h>
+#include <pthread.h>
+
+int __pthread_mutex_timedlock_time32(pthread_mutex_t *restrict m, const struct timespec32 *restrict ts32)
+{
+	return pthread_mutex_timedlock(m, !ts32 ? 0 : (&(struct timespec){
+		.tv_sec = ts32->tv_sec, .tv_nsec = ts32->tv_nsec}));
+}
diff --git a/lib/libc/musl/compat/time32/pthread_rwlock_timedrdlock_time32.c b/lib/libc/musl/compat/time32/pthread_rwlock_timedrdlock_time32.c
new file mode 100644
index 0000000000..33df27a4ad
--- /dev/null
+++ b/lib/libc/musl/compat/time32/pthread_rwlock_timedrdlock_time32.c
@@ -0,0 +1,9 @@
+#include "time32.h"
+#include <time.h>
+#include <pthread.h>
+
+int __pthread_rwlock_timedrdlock_time32(pthread_rwlock_t *restrict rw, const struct timespec32 *restrict ts32)
+{
+	return pthread_rwlock_timedrdlock(rw, !ts32 ? 0 : (&(struct timespec){
+		.tv_sec = ts32->tv_sec, .tv_nsec = ts32->tv_nsec}));
+}
diff --git a/lib/libc/musl/compat/time32/pthread_rwlock_timedwrlock_time32.c b/lib/libc/musl/compat/time32/pthread_rwlock_timedwrlock_time32.c
new file mode 100644
index 0000000000..99f24f734d
--- /dev/null
+++ b/lib/libc/musl/compat/time32/pthread_rwlock_timedwrlock_time32.c
@@ -0,0 +1,9 @@
+#include "time32.h"
+#include <time.h>
+#include <pthread.h>
+
+int __pthread_rwlock_timedwrlock_time32(pthread_rwlock_t *restrict rw, const struct timespec32 *restrict ts32)
+{
+	return pthread_rwlock_timedwrlock(rw, !ts32 ? 0 : (&(struct timespec){
+		.tv_sec = ts32->tv_sec, .tv_nsec = ts32->tv_nsec}));
+}
diff --git a/lib/libc/musl/compat/time32/pthread_timedjoin_np_time32.c b/lib/libc/musl/compat/time32/pthread_timedjoin_np_time32.c
new file mode 100644
index 0000000000..3ec2995115
--- /dev/null
+++ b/lib/libc/musl/compat/time32/pthread_timedjoin_np_time32.c
@@ -0,0 +1,10 @@
+#define _GNU_SOURCE
+#include "time32.h"
+#include <time.h>
+#include <pthread.h>
+
+int __pthread_timedjoin_np_time32(pthread_t t, void **res, const struct timespec32 *at32)
+{
+	return pthread_timedjoin_np(t, res, !at32 ? 0 : (&(struct timespec){
+		.tv_sec = at32->tv_sec, .tv_nsec = at32->tv_nsec}));
+}
diff --git a/lib/libc/musl/compat/time32/recvmmsg_time32.c b/lib/libc/musl/compat/time32/recvmmsg_time32.c
new file mode 100644
index 0000000000..acf1cfb8c0
--- /dev/null
+++ b/lib/libc/musl/compat/time32/recvmmsg_time32.c
@@ -0,0 +1,10 @@
+#include "time32.h"
+#define _GNU_SOURCE
+#include <time.h>
+#include <sys/socket.h>
+
+int __recvmmsg_time32(int fd, struct mmsghdr *msgvec, unsigned int vlen, unsigned int flags, struct timespec32 *ts32)
+{
+	return recvmmsg(fd, msgvec, vlen, flags, ts32 ? (&(struct timespec){
+		.tv_sec = ts32->tv_sec, .tv_nsec = ts32->tv_nsec}) : 0);
+}
diff --git a/lib/libc/musl/compat/time32/sched_rr_get_interval_time32.c b/lib/libc/musl/compat/time32/sched_rr_get_interval_time32.c
new file mode 100644
index 0000000000..36cbbaca02
--- /dev/null
+++ b/lib/libc/musl/compat/time32/sched_rr_get_interval_time32.c
@@ -0,0 +1,13 @@
+#include "time32.h"
+#include <time.h>
+#include <sched.h>
+
+int __sched_rr_get_interval_time32(pid_t pid, struct timespec32 *ts32)
+{
+	struct timespec ts;
+	int r = sched_rr_get_interval(pid, &ts);
+	if (r) return r;
+	ts32->tv_sec = ts.tv_sec;
+	ts32->tv_nsec = ts.tv_nsec;
+	return r;
+}
diff --git a/lib/libc/musl/compat/time32/select_time32.c b/lib/libc/musl/compat/time32/select_time32.c
new file mode 100644
index 0000000000..2d8df9acaf
--- /dev/null
+++ b/lib/libc/musl/compat/time32/select_time32.c
@@ -0,0 +1,10 @@
+#include "time32.h"
+#include <time.h>
+#include <sys/time.h>
+#include <sys/select.h>
+
+int __select_time32(int n, fd_set *restrict rfds, fd_set *restrict wfds, fd_set *restrict efds, struct timeval32 *restrict tv32)
+{
+	return select(n, rfds, wfds, efds, !tv32 ? 0 : (&(struct timeval){
+		.tv_sec = tv32->tv_sec, .tv_usec = tv32->tv_usec}));
+}
diff --git a/lib/libc/musl/compat/time32/sem_timedwait_time32.c b/lib/libc/musl/compat/time32/sem_timedwait_time32.c
new file mode 100644
index 0000000000..c3469f9bc3
--- /dev/null
+++ b/lib/libc/musl/compat/time32/sem_timedwait_time32.c
@@ -0,0 +1,9 @@
+#include "time32.h"
+#include <time.h>
+#include <semaphore.h>
+
+int __sem_timedwait_time32(sem_t *sem, const struct timespec32 *restrict ts32)
+{
+	return sem_timedwait(sem, !ts32 ? 0 : (&(struct timespec){
+		.tv_sec = ts32->tv_sec, .tv_nsec = ts32->tv_nsec}));
+}
diff --git a/lib/libc/musl/compat/time32/semtimedop_time32.c b/lib/libc/musl/compat/time32/semtimedop_time32.c
new file mode 100644
index 0000000000..34ec528199
--- /dev/null
+++ b/lib/libc/musl/compat/time32/semtimedop_time32.c
@@ -0,0 +1,10 @@
+#include "time32.h"
+#define _GNU_SOURCE
+#include <sys/sem.h>
+#include <time.h>
+
+int __semtimedop_time32(int id, struct sembuf *buf, size_t n, const struct timespec32 *ts32)
+{
+	return semtimedop(id, buf, n, !ts32 ? 0 : (&(struct timespec){
+		.tv_sec = ts32->tv_sec, .tv_nsec = ts32->tv_nsec}));
+}
diff --git a/lib/libc/musl/compat/time32/setitimer_time32.c b/lib/libc/musl/compat/time32/setitimer_time32.c
new file mode 100644
index 0000000000..2475fd8c11
--- /dev/null
+++ b/lib/libc/musl/compat/time32/setitimer_time32.c
@@ -0,0 +1,25 @@
+#include "time32.h"
+#include <time.h>
+#include <sys/time.h>
+
+int __setitimer_time32(int which, const struct itimerval32 *restrict new32, struct itimerval32 *restrict old32)
+{
+	struct itimerval old;
+	int r = setitimer(which, (&(struct itimerval){
+		.it_interval.tv_sec = new32->it_interval.tv_sec,
+		.it_interval.tv_usec = new32->it_interval.tv_usec,
+		.it_value.tv_sec = new32->it_value.tv_sec,
+		.it_value.tv_usec = new32->it_value.tv_usec}), &old);
+	if (r) return r;
+	/* The above call has already committed to success by changing the
+	 * timer setting, so we can't fail on out-of-range old value.
+	 * Since these are relative times, values large enough to overflow
+	 * don't make sense anyway. */
+	if (old32) {
+		old32->it_interval.tv_sec = old.it_interval.tv_sec;
+		old32->it_interval.tv_usec = old.it_interval.tv_usec;
+		old32->it_value.tv_sec = old.it_value.tv_sec;
+		old32->it_value.tv_usec = old.it_value.tv_usec;
+	}
+	return 0;
+}
diff --git a/lib/libc/musl/compat/time32/settimeofday_time32.c b/lib/libc/musl/compat/time32/settimeofday_time32.c
new file mode 100644
index 0000000000..09e625cba3
--- /dev/null
+++ b/lib/libc/musl/compat/time32/settimeofday_time32.c
@@ -0,0 +1,10 @@
+#define _BSD_SOURCE
+#include "time32.h"
+#include <sys/time.h>
+
+int __settimeofday_time32(const struct timeval32 *tv32, const void *tz)
+{
+	return settimeofday(!tv32 ? 0 : (&(struct timeval){
+		.tv_sec = tv32->tv_sec,
+		.tv_usec = tv32->tv_usec}), 0);
+}
diff --git a/lib/libc/musl/compat/time32/sigtimedwait_time32.c b/lib/libc/musl/compat/time32/sigtimedwait_time32.c
new file mode 100644
index 0000000000..6b3aa39c72
--- /dev/null
+++ b/lib/libc/musl/compat/time32/sigtimedwait_time32.c
@@ -0,0 +1,9 @@
+#include "time32.h"
+#include <time.h>
+#include <signal.h>
+
+int __sigtimedwait_time32(const sigset_t *restrict set, siginfo_t *restrict si, const struct timespec32 *restrict ts32)
+{
+	return sigtimedwait(set, si, !ts32 ? 0 : (&(struct timespec){
+		.tv_sec = ts32->tv_sec, .tv_nsec = ts32->tv_nsec}));
+}
diff --git a/lib/libc/musl/compat/time32/stat_time32.c b/lib/libc/musl/compat/time32/stat_time32.c
new file mode 100644
index 0000000000..8c6121dadd
--- /dev/null
+++ b/lib/libc/musl/compat/time32/stat_time32.c
@@ -0,0 +1,17 @@
+#include "time32.h"
+#include <time.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <stddef.h>
+
+struct stat32;
+
+int __stat_time32(const char *restrict path, struct stat32 *restrict st32)
+{
+	struct stat st;
+	int r = stat(path, &st);
+	if (!r) memcpy(st32, &st, offsetof(struct stat, st_atim));
+	return r;
+}
+
+weak_alias(stat, stat64);
diff --git a/lib/libc/musl/compat/time32/stime32.c b/lib/libc/musl/compat/time32/stime32.c
new file mode 100644
index 0000000000..cc76364d3b
--- /dev/null
+++ b/lib/libc/musl/compat/time32/stime32.c
@@ -0,0 +1,8 @@
+#define _GNU_SOURCE
+#include "time32.h"
+#include <time.h>
+
+int __stime32(const time32_t *t)
+{
+	return stime(&(time_t){*t});
+}
diff --git a/lib/libc/musl/compat/time32/thrd_sleep_time32.c b/lib/libc/musl/compat/time32/thrd_sleep_time32.c
new file mode 100644
index 0000000000..59088001b2
--- /dev/null
+++ b/lib/libc/musl/compat/time32/thrd_sleep_time32.c
@@ -0,0 +1,16 @@
+#include "time32.h"
+#include <time.h>
+#include <threads.h>
+#include <errno.h>
+
+int __thrd_sleep_time32(const struct timespec32 *req32, struct timespec32 *rem32)
+{
+	struct timespec rem;
+	int ret = thrd_sleep((&(struct timespec){
+		.tv_sec = req32->tv_sec, .tv_nsec = req32->tv_nsec}), &rem);
+	if (ret<0 && errno==EINTR && rem32) {
+		rem32->tv_sec = rem.tv_sec;
+		rem32->tv_nsec = rem.tv_nsec;
+	}
+	return ret;
+}
diff --git a/lib/libc/musl/compat/time32/time32.c b/lib/libc/musl/compat/time32/time32.c
new file mode 100644
index 0000000000..4b8fac1c29
--- /dev/null
+++ b/lib/libc/musl/compat/time32/time32.c
@@ -0,0 +1,15 @@
+#include "time32.h"
+#include <time.h>
+#include <errno.h>
+#include <stdint.h>
+
+time32_t __time32(time32_t *p)
+{
+	time_t t = time(0);
+	if (t < INT32_MIN || t > INT32_MAX) {
+		errno = EOVERFLOW;
+		return -1;
+	}
+	if (p) *p = t;
+	return t;
+}
diff --git a/lib/libc/musl/compat/time32/time32.h b/lib/libc/musl/compat/time32/time32.h
new file mode 100644
index 0000000000..fdec17c345
--- /dev/null
+++ b/lib/libc/musl/compat/time32/time32.h
@@ -0,0 +1,91 @@
+#ifndef TIME32_H
+#define TIME32_H
+
+#include <sys/types.h>
+
+typedef long time32_t;
+
+struct timeval32 {
+	long tv_sec;
+	long tv_usec;
+};
+
+struct itimerval32 {
+	struct timeval32 it_interval;
+	struct timeval32 it_value;
+};
+
+struct timespec32 {
+	long tv_sec;
+	long tv_nsec;
+};
+
+struct itimerspec32 {
+	struct timespec32 it_interval;
+	struct timespec32 it_value;
+};
+
+int __adjtime32() __asm__("adjtime");
+int __adjtimex_time32() __asm__("adjtimex");
+int __aio_suspend_time32() __asm__("aio_suspend");
+int __clock_adjtime32() __asm__("clock_adjtime");
+int __clock_getres_time32() __asm__("clock_getres");
+int __clock_gettime32() __asm__("clock_gettime");
+int __clock_nanosleep_time32() __asm__("clock_nanosleep");
+int __clock_settime32() __asm__("clock_settime");
+int __cnd_timedwait_time32() __asm__("cnd_timedwait");
+char *__ctime32() __asm__("ctime");
+char *__ctime32_r() __asm__("ctime_r");
+double __difftime32() __asm__("difftime");
+int __fstat_time32() __asm__("fstat");
+int __fstatat_time32() __asm__("fstatat");
+int __ftime32() __asm__("ftime");
+int __futimens_time32() __asm__("futimens");
+int __futimes_time32() __asm__("futimes");
+int __futimesat_time32() __asm__("futimesat");
+int __getitimer_time32() __asm__("getitimer");
+int __getrusage_time32() __asm__("getrusage");
+int __gettimeofday_time32() __asm__("gettimeofday");
+struct tm *__gmtime32() __asm__("gmtime");
+struct tm *__gmtime32_r() __asm__("gmtime_r");
+struct tm *__localtime32() __asm__("localtime");
+struct tm *__localtime32_r() __asm__("localtime_r");
+int __lstat_time32() __asm__("lstat");
+int __lutimes_time32() __asm__("lutimes");
+time32_t __mktime32() __asm__("mktime");
+ssize_t __mq_timedreceive_time32() __asm__("mq_timedreceive");
+int __mq_timedsend_time32() __asm__("mq_timedsend");
+int __mtx_timedlock_time32() __asm__("mtx_timedlock");
+int __nanosleep_time32() __asm__("nanosleep");
+int __ppoll_time32() __asm__("ppoll");
+int __pselect_time32() __asm__("pselect");
+int __pthread_cond_timedwait_time32() __asm__("pthread_cond_timedwait");
+int __pthread_mutex_timedlock_time32() __asm__("pthread_mutex_timedlock");
+int __pthread_rwlock_timedrdlock_time32() __asm__("pthread_rwlock_timedrdlock");
+int __pthread_rwlock_timedwrlock_time32() __asm__("pthread_rwlock_timedwrlock");
+int __pthread_timedjoin_np_time32() __asm__("pthread_timedjoin_np");
+int __recvmmsg_time32() __asm__("recvmmsg");
+int __sched_rr_get_interval_time32() __asm__("sched_rr_get_interval");
+int __select_time32() __asm__("select");
+int __sem_timedwait_time32() __asm__("sem_timedwait");
+int __semtimedop_time32() __asm__("semtimedop");
+int __setitimer_time32() __asm__("setitimer");
+int __settimeofday_time32() __asm__("settimeofday");
+int __sigtimedwait_time32() __asm__("sigtimedwait");
+int __stat_time32() __asm__("stat");
+int __stime32() __asm__("stime");
+int __thrd_sleep_time32() __asm__("thrd_sleep");
+time32_t __time32() __asm__("time");
+time32_t __time32gm() __asm__("timegm");
+int __timer_gettime32() __asm__("timer_gettime");
+int __timer_settime32() __asm__("timer_settime");
+int __timerfd_gettime32() __asm__("timerfd_gettime");
+int __timerfd_settime32() __asm__("timerfd_settime");
+int __timespec_get_time32() __asm__("timespec_get");
+int __utime_time32() __asm__("utime");
+int __utimensat_time32() __asm__("utimensat");
+int __utimes_time32() __asm__("utimes");
+pid_t __wait3_time32() __asm__("wait3");
+pid_t __wait4_time32() __asm__("wait4");
+
+#endif
diff --git a/lib/libc/musl/compat/time32/time32gm.c b/lib/libc/musl/compat/time32/time32gm.c
new file mode 100644
index 0000000000..60d68fbf84
--- /dev/null
+++ b/lib/libc/musl/compat/time32/time32gm.c
@@ -0,0 +1,15 @@
+#define _GNU_SOURCE
+#include "time32.h"
+#include <time.h>
+#include <errno.h>
+#include <stdint.h>
+
+time32_t __time32gm(struct tm *tm)
+{
+	time_t t = timegm(tm);
+	if (t < INT32_MIN || t > INT32_MAX) {
+		errno = EOVERFLOW;
+		return -1;
+	}
+	return t;
+}
diff --git a/lib/libc/musl/compat/time32/timer_gettime32.c b/lib/libc/musl/compat/time32/timer_gettime32.c
new file mode 100644
index 0000000000..b4184cc283
--- /dev/null
+++ b/lib/libc/musl/compat/time32/timer_gettime32.c
@@ -0,0 +1,15 @@
+#include "time32.h"
+#include <time.h>
+
+int __timer_gettime32(timer_t t, struct itimerspec32 *val32)
+{
+	struct itimerspec old;
+	int r = timer_gettime(t, &old);
+	if (r) return r;
+	/* No range checking for consistency with settime */
+	val32->it_interval.tv_sec = old.it_interval.tv_sec;
+	val32->it_interval.tv_nsec = old.it_interval.tv_nsec;
+	val32->it_value.tv_sec = old.it_value.tv_sec;
+	val32->it_value.tv_nsec = old.it_value.tv_nsec;
+	return 0;
+}
diff --git a/lib/libc/musl/compat/time32/timer_settime32.c b/lib/libc/musl/compat/time32/timer_settime32.c
new file mode 100644
index 0000000000..a447e7d41a
--- /dev/null
+++ b/lib/libc/musl/compat/time32/timer_settime32.c
@@ -0,0 +1,25 @@
+#include "time32.h"
+#include <time.h>
+
+int __timer_settime32(timer_t t, int flags, const struct itimerspec32 *restrict val32, struct itimerspec32 *restrict old32)
+{
+	struct itimerspec old;
+	int r = timer_settime(t, flags, (&(struct itimerspec){
+		.it_interval.tv_sec = val32->it_interval.tv_sec,
+		.it_interval.tv_nsec = val32->it_interval.tv_nsec,
+		.it_value.tv_sec = val32->it_value.tv_sec,
+		.it_value.tv_nsec = val32->it_value.tv_nsec}),
+		old32 ? &old : 0);
+	if (r) return r;
+	/* The above call has already committed to success by changing the
+	 * timer setting, so we can't fail on out-of-range old value.
+	 * Since these are relative times, values large enough to overflow
+	 * don't make sense anyway. */
+	if (old32) {
+		old32->it_interval.tv_sec = old.it_interval.tv_sec;
+		old32->it_interval.tv_nsec = old.it_interval.tv_nsec;
+		old32->it_value.tv_sec = old.it_value.tv_sec;
+		old32->it_value.tv_nsec = old.it_value.tv_nsec;
+	}
+	return 0;
+}
diff --git a/lib/libc/musl/compat/time32/timerfd_gettime32.c b/lib/libc/musl/compat/time32/timerfd_gettime32.c
new file mode 100644
index 0000000000..75e5435f18
--- /dev/null
+++ b/lib/libc/musl/compat/time32/timerfd_gettime32.c
@@ -0,0 +1,16 @@
+#include "time32.h"
+#include <time.h>
+#include <sys/timerfd.h>
+
+int __timerfd_gettime32(int t, struct itimerspec32 *val32)
+{
+	struct itimerspec old;
+	int r = timerfd_gettime(t, &old);
+	if (r) return r;
+	/* No range checking for consistency with settime */
+	val32->it_interval.tv_sec = old.it_interval.tv_sec;
+	val32->it_interval.tv_nsec = old.it_interval.tv_nsec;
+	val32->it_value.tv_sec = old.it_value.tv_sec;
+	val32->it_value.tv_nsec = old.it_value.tv_nsec;
+	return 0;
+}
diff --git a/lib/libc/musl/compat/time32/timerfd_settime32.c b/lib/libc/musl/compat/time32/timerfd_settime32.c
new file mode 100644
index 0000000000..67830d3418
--- /dev/null
+++ b/lib/libc/musl/compat/time32/timerfd_settime32.c
@@ -0,0 +1,26 @@
+#include "time32.h"
+#include <time.h>
+#include <sys/timerfd.h>
+
+int __timerfd_settime32(int t, int flags, const struct itimerspec32 *restrict val32, struct itimerspec32 *restrict old32)
+{
+	struct itimerspec old;
+	int r = timerfd_settime(t, flags, (&(struct itimerspec){
+		.it_interval.tv_sec = val32->it_interval.tv_sec,
+		.it_interval.tv_nsec = val32->it_interval.tv_nsec,
+		.it_value.tv_sec = val32->it_value.tv_sec,
+		.it_value.tv_nsec = val32->it_value.tv_nsec}),
+		old32 ? &old : 0);
+	if (r) return r;
+	/* The above call has already committed to success by changing the
+	 * timer setting, so we can't fail on out-of-range old value.
+	 * Since these are relative times, values large enough to overflow
+	 * don't make sense anyway. */
+	if (old32) {
+		old32->it_interval.tv_sec = old.it_interval.tv_sec;
+		old32->it_interval.tv_nsec = old.it_interval.tv_nsec;
+		old32->it_value.tv_sec = old.it_value.tv_sec;
+		old32->it_value.tv_nsec = old.it_value.tv_nsec;
+	}
+	return 0;
+}
diff --git a/lib/libc/musl/compat/time32/timespec_get_time32.c b/lib/libc/musl/compat/time32/timespec_get_time32.c
new file mode 100644
index 0000000000..e9ca94cb42
--- /dev/null
+++ b/lib/libc/musl/compat/time32/timespec_get_time32.c
@@ -0,0 +1,18 @@
+#include "time32.h"
+#include <time.h>
+#include <errno.h>
+#include <stdint.h>
+
+int __timespec_get_time32(struct timespec32 *ts32, int base)
+{
+	struct timespec ts;
+	int r = timespec_get(&ts, base);
+	if (!r) return r;
+	if (ts.tv_sec < INT32_MIN || ts.tv_sec > INT32_MAX) {
+		errno = EOVERFLOW;
+		return 0;
+	}
+	ts32->tv_sec = ts.tv_sec;
+	ts32->tv_nsec = ts.tv_nsec;
+	return r;
+}
diff --git a/lib/libc/musl/compat/time32/utime_time32.c b/lib/libc/musl/compat/time32/utime_time32.c
new file mode 100644
index 0000000000..65f11d4634
--- /dev/null
+++ b/lib/libc/musl/compat/time32/utime_time32.c
@@ -0,0 +1,14 @@
+#include "time32.h"
+#include <time.h>
+#include <utime.h>
+
+struct utimbuf32 {
+	time32_t actime;
+	time32_t modtime;
+};
+
+int __utime_time32(const char *path, const struct utimbuf32 *times32)
+{
+	return utime(path, !times32 ? 0 : (&(struct utimbuf){
+		.actime = times32->actime, .modtime = times32->modtime}));
+}
diff --git a/lib/libc/musl/compat/time32/utimensat_time32.c b/lib/libc/musl/compat/time32/utimensat_time32.c
new file mode 100644
index 0000000000..c687b8d1b4
--- /dev/null
+++ b/lib/libc/musl/compat/time32/utimensat_time32.c
@@ -0,0 +1,11 @@
+#include "time32.h"
+#include <time.h>
+#include <sys/stat.h>
+
+int __utimensat_time32(int fd, const char *path, const struct timespec32 times32[2], int flags)
+{
+	return utimensat(fd, path, !times32 ? 0 : ((struct timespec[2]){
+		{.tv_sec = times32[0].tv_sec,.tv_nsec = times32[0].tv_nsec},
+		{.tv_sec = times32[1].tv_sec,.tv_nsec = times32[1].tv_nsec}}),
+		flags);
+}
diff --git a/lib/libc/musl/compat/time32/utimes_time32.c b/lib/libc/musl/compat/time32/utimes_time32.c
new file mode 100644
index 0000000000..59248f623b
--- /dev/null
+++ b/lib/libc/musl/compat/time32/utimes_time32.c
@@ -0,0 +1,11 @@
+#include "time32.h"
+#include <time.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+
+int __utimes_time32(const char *path, const struct timeval32 times32[2])
+{
+	return utimes(path, !times32 ? 0 : ((struct timeval[2]){
+		{.tv_sec = times32[0].tv_sec,.tv_usec = times32[0].tv_usec},
+		{.tv_sec = times32[1].tv_sec,.tv_usec = times32[1].tv_usec}}));
+}
diff --git a/lib/libc/musl/compat/time32/wait3_time32.c b/lib/libc/musl/compat/time32/wait3_time32.c
new file mode 100644
index 0000000000..8fe128edbf
--- /dev/null
+++ b/lib/libc/musl/compat/time32/wait3_time32.c
@@ -0,0 +1,40 @@
+#define _BSD_SOURCE
+#include "time32.h"
+#include <string.h>
+#include <stddef.h>
+#include <sys/wait.h>
+
+struct compat_rusage {
+	struct timeval32 ru_utime;
+	struct timeval32 ru_stime;
+	long	ru_maxrss;
+	long	ru_ixrss;
+	long	ru_idrss;
+	long	ru_isrss;
+	long	ru_minflt;
+	long	ru_majflt;
+	long	ru_nswap;
+	long	ru_inblock;
+	long	ru_oublock;
+	long	ru_msgsnd;
+	long	ru_msgrcv;
+	long	ru_nsignals;
+	long	ru_nvcsw;
+	long	ru_nivcsw;
+};
+
+pid_t __wait3_time32(int *status, int options, struct compat_rusage *usage)
+{
+	struct rusage ru;
+	int r = wait3(status, options, usage ? &ru : 0);
+	if (!r && usage) {
+		usage->ru_utime.tv_sec = ru.ru_utime.tv_sec;
+		usage->ru_utime.tv_usec = ru.ru_utime.tv_usec;
+		usage->ru_stime.tv_sec = ru.ru_stime.tv_sec;
+		usage->ru_stime.tv_usec = ru.ru_stime.tv_usec;
+		memcpy(&usage->ru_maxrss, &ru.ru_maxrss,
+			sizeof(struct compat_rusage) -
+			offsetof(struct compat_rusage, ru_maxrss));
+	}
+	return r;
+}
diff --git a/lib/libc/musl/compat/time32/wait4_time32.c b/lib/libc/musl/compat/time32/wait4_time32.c
new file mode 100644
index 0000000000..918548e74f
--- /dev/null
+++ b/lib/libc/musl/compat/time32/wait4_time32.c
@@ -0,0 +1,40 @@
+#define _BSD_SOURCE
+#include "time32.h"
+#include <string.h>
+#include <stddef.h>
+#include <sys/wait.h>
+
+struct compat_rusage {
+	struct timeval32 ru_utime;
+	struct timeval32 ru_stime;
+	long	ru_maxrss;
+	long	ru_ixrss;
+	long	ru_idrss;
+	long	ru_isrss;
+	long	ru_minflt;
+	long	ru_majflt;
+	long	ru_nswap;
+	long	ru_inblock;
+	long	ru_oublock;
+	long	ru_msgsnd;
+	long	ru_msgrcv;
+	long	ru_nsignals;
+	long	ru_nvcsw;
+	long	ru_nivcsw;
+};
+
+pid_t __wait4_time32(pid_t pid, int *status, int options, struct compat_rusage *usage)
+{
+	struct rusage ru;
+	int r = wait4(pid, status, options, usage ? &ru : 0);
+	if (!r && usage) {
+		usage->ru_utime.tv_sec = ru.ru_utime.tv_sec;
+		usage->ru_utime.tv_usec = ru.ru_utime.tv_usec;
+		usage->ru_stime.tv_sec = ru.ru_stime.tv_sec;
+		usage->ru_stime.tv_usec = ru.ru_stime.tv_usec;
+		memcpy(&usage->ru_maxrss, &ru.ru_maxrss,
+			sizeof(struct compat_rusage) -
+			offsetof(struct compat_rusage, ru_maxrss));
+	}
+	return r;
+}
diff --git a/lib/libc/musl/include/aio.h b/lib/libc/musl/include/aio.h
index 19bc28a9b1..453c41b748 100644
--- a/lib/libc/musl/include/aio.h
+++ b/lib/libc/musl/include/aio.h
@@ -62,6 +62,10 @@ int lio_listio(int, struct aiocb *__restrict const *__restrict, int, struct sige
 #define off64_t off_t
 #endif
 
+#if _REDIR_TIME64
+__REDIR(aio_suspend, __aio_suspend_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/alloca.h b/lib/libc/musl/include/alloca.h
index d2e6f1c681..b8d183d144 100644
--- a/lib/libc/musl/include/alloca.h
+++ b/lib/libc/musl/include/alloca.h
@@ -10,9 +10,7 @@ extern "C" {
 
 void *alloca(size_t);
 
-#ifdef __GNUC__
 #define alloca __builtin_alloca
-#endif
 
 #ifdef __cplusplus
 }
diff --git a/lib/libc/musl/include/alltypes.h.in b/lib/libc/musl/include/alltypes.h.in
index 4cc879b1d7..d9ff462e1e 100644
--- a/lib/libc/musl/include/alltypes.h.in
+++ b/lib/libc/musl/include/alltypes.h.in
@@ -1,3 +1,7 @@
+#define __LITTLE_ENDIAN 1234
+#define __BIG_ENDIAN 4321
+#define __USE_TIME_BITS64 1
+
 TYPEDEF unsigned _Addr size_t;
 TYPEDEF unsigned _Addr uintptr_t;
 TYPEDEF _Addr ptrdiff_t;
@@ -5,6 +9,8 @@ TYPEDEF _Addr ssize_t;
 TYPEDEF _Addr intptr_t;
 TYPEDEF _Addr regoff_t;
 TYPEDEF _Reg register_t;
+TYPEDEF _Int64 time_t;
+TYPEDEF _Int64 suseconds_t;
 
 TYPEDEF signed char     int8_t;
 TYPEDEF signed short    int16_t;
@@ -35,7 +41,7 @@ TYPEDEF void * timer_t;
 TYPEDEF int clockid_t;
 TYPEDEF long clock_t;
 STRUCT timeval { time_t tv_sec; suseconds_t tv_usec; };
-STRUCT timespec { time_t tv_sec; long tv_nsec; };
+STRUCT timespec { time_t tv_sec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER==4321); long tv_nsec; int :8*(sizeof(time_t)-sizeof(long))*(__BYTE_ORDER!=4321); };
 
 TYPEDEF int pid_t;
 TYPEDEF unsigned id_t;
@@ -60,6 +66,9 @@ TYPEDEF struct { unsigned __attr[2]; } pthread_rwlockattr_t;
 STRUCT _IO_FILE { char __x; };
 TYPEDEF struct _IO_FILE FILE;
 
+TYPEDEF __builtin_va_list va_list;
+TYPEDEF __builtin_va_list __isoc_va_list;
+
 TYPEDEF struct __mbstate_t { unsigned __opaque1, __opaque2; } mbstate_t;
 
 TYPEDEF struct __locale_struct * locale_t;
@@ -71,6 +80,14 @@ STRUCT iovec { void *iov_base; size_t iov_len; };
 TYPEDEF unsigned socklen_t;
 TYPEDEF unsigned short sa_family_t;
 
+TYPEDEF struct { union { int __i[sizeof(long)==8?14:9]; volatile int __vi[sizeof(long)==8?14:9]; unsigned long __s[sizeof(long)==8?7:9]; } __u; } pthread_attr_t;
+TYPEDEF struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } pthread_mutex_t;
+TYPEDEF struct { union { int __i[sizeof(long)==8?10:6]; volatile int __vi[sizeof(long)==8?10:6]; volatile void *volatile __p[sizeof(long)==8?5:6]; } __u; } mtx_t;
+TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } pthread_cond_t;
+TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[12*sizeof(int)/sizeof(void*)]; } __u; } cnd_t;
+TYPEDEF struct { union { int __i[sizeof(long)==8?14:8]; volatile int __vi[sizeof(long)==8?14:8]; void *__p[sizeof(long)==8?7:8]; } __u; } pthread_rwlock_t;
+TYPEDEF struct { union { int __i[sizeof(long)==8?8:5]; volatile int __vi[sizeof(long)==8?8:5]; void *__p[sizeof(long)==8?4:5]; } __u; } pthread_barrier_t;
+
 #undef _Addr
 #undef _Int64
 #undef _Reg
diff --git a/lib/libc/musl/include/arpa/nameser.h b/lib/libc/musl/include/arpa/nameser.h
index b315e0f357..581925a433 100644
--- a/lib/libc/musl/include/arpa/nameser.h
+++ b/lib/libc/musl/include/arpa/nameser.h
@@ -7,7 +7,6 @@ extern "C" {
 
 #include <stddef.h>
 #include <stdint.h>
-#include <endian.h>
 
 #define __NAMESER	19991006
 #define NS_PACKETSZ	512
diff --git a/lib/libc/musl/include/dirent.h b/lib/libc/musl/include/dirent.h
index e0a8fe6a2f..650ecf646a 100644
--- a/lib/libc/musl/include/dirent.h
+++ b/lib/libc/musl/include/dirent.h
@@ -15,20 +15,10 @@ extern "C" {
 
 #include <bits/alltypes.h>
 
+#include <bits/dirent.h>
+
 typedef struct __dirstream DIR;
 
-#define _DIRENT_HAVE_D_RECLEN
-#define _DIRENT_HAVE_D_OFF
-#define _DIRENT_HAVE_D_TYPE
-
-struct dirent {
-	ino_t d_ino;
-	off_t d_off;
-	unsigned short d_reclen;
-	unsigned char d_type;
-	char d_name[256];
-};
-
 #define d_fileno d_ino
 
 int            closedir(DIR *);
diff --git a/lib/libc/musl/include/dlfcn.h b/lib/libc/musl/include/dlfcn.h
index 78fb0733b2..13ab71dd07 100644
--- a/lib/libc/musl/include/dlfcn.h
+++ b/lib/libc/musl/include/dlfcn.h
@@ -35,6 +35,10 @@ int dladdr(const void *, Dl_info *);
 int dlinfo(void *, int, void *);
 #endif
 
+#if _REDIR_TIME64
+__REDIR(dlsym, __dlsym_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/endian.h b/lib/libc/musl/include/endian.h
index 1bd444518a..172c43203a 100644
--- a/lib/libc/musl/include/endian.h
+++ b/lib/libc/musl/include/endian.h
@@ -3,25 +3,19 @@
 
 #include <features.h>
 
-#define __LITTLE_ENDIAN 1234
-#define __BIG_ENDIAN 4321
+#define __NEED_uint16_t
+#define __NEED_uint32_t
+#define __NEED_uint64_t
+
+#include <bits/alltypes.h>
+
 #define __PDP_ENDIAN 3412
 
-#if defined(__GNUC__) && defined(__BYTE_ORDER__)
-#define __BYTE_ORDER __BYTE_ORDER__
-#else
-#include <bits/endian.h>
-#endif
-
-#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-
 #define BIG_ENDIAN __BIG_ENDIAN
 #define LITTLE_ENDIAN __LITTLE_ENDIAN
 #define PDP_ENDIAN __PDP_ENDIAN
 #define BYTE_ORDER __BYTE_ORDER
 
-#include <stdint.h>
-
 static __inline uint16_t __bswap16(uint16_t __x)
 {
 	return __x<<8 | __x>>8;
@@ -40,43 +34,47 @@ static __inline uint64_t __bswap64(uint64_t __x)
 #if __BYTE_ORDER == __LITTLE_ENDIAN
 #define htobe16(x) __bswap16(x)
 #define be16toh(x) __bswap16(x)
-#define betoh16(x) __bswap16(x)
 #define htobe32(x) __bswap32(x)
 #define be32toh(x) __bswap32(x)
-#define betoh32(x) __bswap32(x)
 #define htobe64(x) __bswap64(x)
 #define be64toh(x) __bswap64(x)
-#define betoh64(x) __bswap64(x)
 #define htole16(x) (uint16_t)(x)
 #define le16toh(x) (uint16_t)(x)
-#define letoh16(x) (uint16_t)(x)
 #define htole32(x) (uint32_t)(x)
 #define le32toh(x) (uint32_t)(x)
-#define letoh32(x) (uint32_t)(x)
 #define htole64(x) (uint64_t)(x)
 #define le64toh(x) (uint64_t)(x)
-#define letoh64(x) (uint64_t)(x)
 #else
 #define htobe16(x) (uint16_t)(x)
 #define be16toh(x) (uint16_t)(x)
-#define betoh16(x) (uint16_t)(x)
 #define htobe32(x) (uint32_t)(x)
 #define be32toh(x) (uint32_t)(x)
-#define betoh32(x) (uint32_t)(x)
 #define htobe64(x) (uint64_t)(x)
 #define be64toh(x) (uint64_t)(x)
-#define betoh64(x) (uint64_t)(x)
 #define htole16(x) __bswap16(x)
 #define le16toh(x) __bswap16(x)
-#define letoh16(x) __bswap16(x)
 #define htole32(x) __bswap32(x)
 #define le32toh(x) __bswap32(x)
-#define letoh32(x) __bswap32(x)
 #define htole64(x) __bswap64(x)
 #define le64toh(x) __bswap64(x)
+#endif
+
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define betoh16(x) __bswap16(x)
+#define betoh32(x) __bswap32(x)
+#define betoh64(x) __bswap64(x)
+#define letoh16(x) (uint16_t)(x)
+#define letoh32(x) (uint32_t)(x)
+#define letoh64(x) (uint64_t)(x)
+#else
+#define betoh16(x) (uint16_t)(x)
+#define betoh32(x) (uint32_t)(x)
+#define betoh64(x) (uint64_t)(x)
+#define letoh16(x) __bswap16(x)
+#define letoh32(x) __bswap32(x)
 #define letoh64(x) __bswap64(x)
 #endif
-
 #endif
 
 #endif
diff --git a/lib/libc/musl/include/features.h b/lib/libc/musl/include/features.h
index f4d651efcd..85cfb72a0d 100644
--- a/lib/libc/musl/include/features.h
+++ b/lib/libc/musl/include/features.h
@@ -35,4 +35,6 @@
 #define _Noreturn
 #endif
 
+#define __REDIR(x,y) __typeof__(x) x __asm__(#y)
+
 #endif
diff --git a/lib/libc/musl/include/limits.h b/lib/libc/musl/include/limits.h
index 02c2139d27..53a27b9de4 100644
--- a/lib/libc/musl/include/limits.h
+++ b/lib/libc/musl/include/limits.h
@@ -3,9 +3,7 @@
 
 #include <features.h>
 
-/* Most limits are system-specific */
-
-#include <bits/limits.h>
+#include <bits/alltypes.h> /* __LONG_MAX */
 
 /* Support signed or unsigned plain-char */
 
@@ -17,8 +15,6 @@
 #define CHAR_MAX 127
 #endif
 
-/* Some universal constants... */
-
 #define CHAR_BIT 8
 #define SCHAR_MIN (-128)
 #define SCHAR_MAX 127
@@ -30,8 +26,10 @@
 #define INT_MAX  0x7fffffff
 #define UINT_MAX 0xffffffffU
 #define LONG_MIN (-LONG_MAX-1)
+#define LONG_MAX __LONG_MAX
 #define ULONG_MAX (2UL*LONG_MAX+1)
 #define LLONG_MIN (-LLONG_MAX-1)
+#define LLONG_MAX  0x7fffffffffffffffLL
 #define ULLONG_MAX (2ULL*LLONG_MAX+1)
 
 #define MB_LEN_MAX 4
@@ -39,9 +37,13 @@
 #if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
  || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
 
+#include <bits/limits.h>
+
 #define PIPE_BUF 4096
 #define FILESIZEBITS 64
+#ifndef NAME_MAX
 #define NAME_MAX 255
+#endif
 #define PATH_MAX 4096
 #define NGROUPS_MAX 32
 #define ARG_MAX 131072
@@ -53,6 +55,12 @@
 #define TTY_NAME_MAX 32
 #define HOST_NAME_MAX 255
 
+#if LONG_MAX == 0x7fffffffL
+#define LONG_BIT 32
+#else
+#define LONG_BIT 64
+#endif
+
 /* Implementation choices... */
 
 #define PTHREAD_KEYS_MAX 128
diff --git a/lib/libc/musl/include/mqueue.h b/lib/libc/musl/include/mqueue.h
index f5cbe79656..0c807ea0cb 100644
--- a/lib/libc/musl/include/mqueue.h
+++ b/lib/libc/musl/include/mqueue.h
@@ -30,6 +30,11 @@ ssize_t mq_timedreceive(mqd_t, char *__restrict, size_t, unsigned *__restrict, c
 int mq_timedsend(mqd_t, const char *, size_t, unsigned, const struct timespec *);
 int mq_unlink(const char *);
 
+#if _REDIR_TIME64
+__REDIR(mq_timedreceive, __mq_timedreceive_time64);
+__REDIR(mq_timedsend, __mq_timedsend_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/netinet/icmp6.h b/lib/libc/musl/include/netinet/icmp6.h
index cf951d9133..01269e7d4a 100644
--- a/lib/libc/musl/include/netinet/icmp6.h
+++ b/lib/libc/musl/include/netinet/icmp6.h
@@ -9,7 +9,6 @@ extern "C" {
 #include <string.h>
 #include <sys/types.h>
 #include <netinet/in.h>
-#include <endian.h>
 
 #define ICMP6_FILTER 1
 
diff --git a/lib/libc/musl/include/netinet/if_ether.h b/lib/libc/musl/include/netinet/if_ether.h
index 8af47dbef5..a08485e7f7 100644
--- a/lib/libc/musl/include/netinet/if_ether.h
+++ b/lib/libc/musl/include/netinet/if_ether.h
@@ -58,6 +58,7 @@
 #define ETH_P_ERSPAN	0x88BE
 #define ETH_P_PREAUTH	0x88C7
 #define ETH_P_TIPC	0x88CA
+#define ETH_P_LLDP	0x88CC
 #define ETH_P_MACSEC	0x88E5
 #define ETH_P_8021AH	0x88E7
 #define ETH_P_MVRP	0x88F5
diff --git a/lib/libc/musl/include/netinet/ip.h b/lib/libc/musl/include/netinet/ip.h
index d7fa8d5e4e..0ae132a585 100644
--- a/lib/libc/musl/include/netinet/ip.h
+++ b/lib/libc/musl/include/netinet/ip.h
@@ -7,7 +7,6 @@ extern "C" {
 
 #include <stdint.h>
 #include <netinet/in.h>
-#include <endian.h>
 
 struct timestamp {
 	uint8_t len;
@@ -191,6 +190,8 @@ struct ip_timestamp {
 
 #define	IP_MSS		576
 
+#define __UAPI_DEF_IPHDR	0
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/netinet/ip6.h b/lib/libc/musl/include/netinet/ip6.h
index a4347a53fd..50c626a69c 100644
--- a/lib/libc/musl/include/netinet/ip6.h
+++ b/lib/libc/musl/include/netinet/ip6.h
@@ -7,7 +7,6 @@ extern "C" {
 
 #include <stdint.h>
 #include <netinet/in.h>
-#include <endian.h>
 
 struct ip6_hdr {
 	union {
diff --git a/lib/libc/musl/include/netinet/tcp.h b/lib/libc/musl/include/netinet/tcp.h
index c7a86480d3..44a007aaf5 100644
--- a/lib/libc/musl/include/netinet/tcp.h
+++ b/lib/libc/musl/include/netinet/tcp.h
@@ -38,6 +38,7 @@
 #define TCP_FASTOPEN_NO_COOKIE 34
 #define TCP_ZEROCOPY_RECEIVE   35
 #define TCP_INQ          36
+#define TCP_TX_DELAY     37
 
 #define TCP_CM_INQ TCP_INQ
 
@@ -97,7 +98,6 @@ enum {
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <stdint.h>
-#include <endian.h>
 
 typedef uint32_t tcp_seq;
 
@@ -234,6 +234,8 @@ struct tcp_info {
 	uint64_t tcpi_bytes_retrans;
 	uint32_t tcpi_dsack_dups;
 	uint32_t tcpi_reord_seen;
+	uint32_t tcpi_rcv_ooopack;
+	uint32_t tcpi_snd_wnd;
 };
 
 #define TCP_MD5SIG_MAXKEYLEN    80
diff --git a/lib/libc/musl/include/poll.h b/lib/libc/musl/include/poll.h
index daccc760bb..472e4b8470 100644
--- a/lib/libc/musl/include/poll.h
+++ b/lib/libc/musl/include/poll.h
@@ -44,6 +44,12 @@ int poll (struct pollfd *, nfds_t, int);
 int ppoll(struct pollfd *, nfds_t, const struct timespec *, const sigset_t *);
 #endif
 
+#if _REDIR_TIME64
+#ifdef _GNU_SOURCE
+__REDIR(ppoll, __ppoll_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/pthread.h b/lib/libc/musl/include/pthread.h
index e238321b9c..984db68064 100644
--- a/lib/libc/musl/include/pthread.h
+++ b/lib/libc/musl/include/pthread.h
@@ -224,6 +224,16 @@ int pthread_tryjoin_np(pthread_t, void **);
 int pthread_timedjoin_np(pthread_t, void **, const struct timespec *);
 #endif
 
+#if _REDIR_TIME64
+__REDIR(pthread_mutex_timedlock, __pthread_mutex_timedlock_time64);
+__REDIR(pthread_cond_timedwait, __pthread_cond_timedwait_time64);
+__REDIR(pthread_rwlock_timedrdlock, __pthread_rwlock_timedrdlock_time64);
+__REDIR(pthread_rwlock_timedwrlock, __pthread_rwlock_timedwrlock_time64);
+#ifdef _GNU_SOURCE
+__REDIR(pthread_timedjoin_np, __pthread_timedjoin_np_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/sched.h b/lib/libc/musl/include/sched.h
index 7e470d3a13..822f464efd 100644
--- a/lib/libc/musl/include/sched.h
+++ b/lib/libc/musl/include/sched.h
@@ -19,10 +19,14 @@ extern "C" {
 struct sched_param {
 	int sched_priority;
 	int __reserved1;
+#if _REDIR_TIME64
+	long __reserved2[4];
+#else
 	struct {
 		time_t __reserved1;
 		long __reserved2;
 	} __reserved2[2];
+#endif
 	int __reserved3;
 };
 
@@ -133,6 +137,10 @@ __CPU_op_func_S(XOR, ^)
 
 #endif
 
+#if _REDIR_TIME64
+__REDIR(sched_rr_get_interval, __sched_rr_get_interval_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/semaphore.h b/lib/libc/musl/include/semaphore.h
index 277c47d6f7..3690f49609 100644
--- a/lib/libc/musl/include/semaphore.h
+++ b/lib/libc/musl/include/semaphore.h
@@ -29,6 +29,10 @@ int    sem_trywait(sem_t *);
 int    sem_unlink(const char *);
 int    sem_wait(sem_t *);
 
+#if _REDIR_TIME64
+__REDIR(sem_timedwait, __sem_timedwait_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/signal.h b/lib/libc/musl/include/signal.h
index 5c48cb838f..fbdf667b2f 100644
--- a/lib/libc/musl/include/signal.h
+++ b/lib/libc/musl/include/signal.h
@@ -271,6 +271,14 @@ typedef int sig_atomic_t;
 void (*signal(int, void (*)(int)))(int);
 int raise(int);
 
+#if _REDIR_TIME64
+#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
+ || defined(_BSD_SOURCE)
+__REDIR(sigtimedwait, __sigtimedwait_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/sys/acct.h b/lib/libc/musl/include/sys/acct.h
index 9b0ba36fbe..fae9d0508f 100644
--- a/lib/libc/musl/include/sys/acct.h
+++ b/lib/libc/musl/include/sys/acct.h
@@ -6,7 +6,6 @@ extern "C" {
 #endif
 
 #include <features.h>
-#include <endian.h>
 #include <time.h>
 #include <stdint.h>
 
diff --git a/lib/libc/musl/include/sys/ioctl.h b/lib/libc/musl/include/sys/ioctl.h
index 372e3ddc1c..c2ce3b4840 100644
--- a/lib/libc/musl/include/sys/ioctl.h
+++ b/lib/libc/musl/include/sys/ioctl.h
@@ -4,6 +4,7 @@
 extern "C" {
 #endif
 
+#include <bits/alltypes.h>
 #include <bits/ioctl.h>
 
 #define N_TTY           0
diff --git a/lib/libc/musl/include/sys/mman.h b/lib/libc/musl/include/sys/mman.h
index d0761b1832..3bade72720 100644
--- a/lib/libc/musl/include/sys/mman.h
+++ b/lib/libc/musl/include/sys/mman.h
@@ -92,6 +92,8 @@ extern "C" {
 #define MADV_DODUMP      17
 #define MADV_WIPEONFORK  18
 #define MADV_KEEPONFORK  19
+#define MADV_COLD        20
+#define MADV_PAGEOUT     21
 #define MADV_HWPOISON    100
 #define MADV_SOFT_OFFLINE 101
 #endif
diff --git a/lib/libc/musl/include/sys/prctl.h b/lib/libc/musl/include/sys/prctl.h
index 07f0d73dc7..d9c846e9c2 100644
--- a/lib/libc/musl/include/sys/prctl.h
+++ b/lib/libc/musl/include/sys/prctl.h
@@ -154,6 +154,10 @@ struct prctl_mm_map {
 #define PR_PAC_APDBKEY (1UL << 3)
 #define PR_PAC_APGAKEY (1UL << 4)
 
+#define PR_SET_TAGGED_ADDR_CTRL 55
+#define PR_GET_TAGGED_ADDR_CTRL 56
+#define PR_TAGGED_ADDR_ENABLE (1UL << 0)
+
 int prctl (int, ...);
 
 #ifdef __cplusplus
diff --git a/lib/libc/musl/include/sys/procfs.h b/lib/libc/musl/include/sys/procfs.h
index e23bf1ad6b..38e58c168b 100644
--- a/lib/libc/musl/include/sys/procfs.h
+++ b/lib/libc/musl/include/sys/procfs.h
@@ -23,10 +23,9 @@ struct elf_prstatus {
 	pid_t pr_ppid;
 	pid_t pr_pgrp;
 	pid_t pr_sid;
-	struct timeval pr_utime;
-	struct timeval pr_stime;
-	struct timeval pr_cutime;
-	struct timeval pr_cstime;
+	struct {
+		long tv_sec, tv_usec;
+	} pr_utime, pr_stime, pr_cutime, pr_cstime;
 	elf_gregset_t pr_reg;
 	int pr_fpvalid;
 };
diff --git a/lib/libc/musl/include/sys/ptrace.h b/lib/libc/musl/include/sys/ptrace.h
index 229e1f3d99..5d62a9859a 100644
--- a/lib/libc/musl/include/sys/ptrace.h
+++ b/lib/libc/musl/include/sys/ptrace.h
@@ -41,6 +41,7 @@ extern "C" {
 #define PTRACE_SETSIGMASK 0x420b
 #define PTRACE_SECCOMP_GET_FILTER 0x420c
 #define PTRACE_SECCOMP_GET_METADATA 0x420d
+#define PTRACE_GET_SYSCALL_INFO 0x420e
 
 #define PT_READ_I PTRACE_PEEKTEXT
 #define PT_READ_D PTRACE_PEEKDATA
@@ -88,6 +89,11 @@ extern "C" {
 
 #define PTRACE_PEEKSIGINFO_SHARED 1
 
+#define PTRACE_SYSCALL_INFO_NONE 0
+#define PTRACE_SYSCALL_INFO_ENTRY 1
+#define PTRACE_SYSCALL_INFO_EXIT 2
+#define PTRACE_SYSCALL_INFO_SECCOMP 3
+
 #include <bits/ptrace.h>
 
 struct __ptrace_peeksiginfo_args {
@@ -101,6 +107,29 @@ struct __ptrace_seccomp_metadata {
 	uint64_t flags;
 };
 
+struct __ptrace_syscall_info {
+	uint8_t op;
+	uint8_t __pad[3];
+	uint32_t arch;
+	uint64_t instruction_pointer;
+	uint64_t stack_pointer;
+	union {
+		struct {
+			uint64_t nr;
+			uint64_t args[6];
+		} entry;
+		struct {
+			int64_t rval;
+			uint8_t is_error;
+		} exit;
+		struct {
+			uint64_t nr;
+			uint64_t args[6];
+			uint32_t ret_data;
+		} seccomp;
+	};
+};
+
 long ptrace(int, ...);
 
 #ifdef __cplusplus
diff --git a/lib/libc/musl/include/sys/resource.h b/lib/libc/musl/include/sys/resource.h
index 70d793d563..3068328d09 100644
--- a/lib/libc/musl/include/sys/resource.h
+++ b/lib/libc/musl/include/sys/resource.h
@@ -90,7 +90,8 @@ int prlimit(pid_t, int, const struct rlimit *, struct rlimit *);
 #define RLIMIT_MSGQUEUE 12
 #define RLIMIT_NICE    13
 #define RLIMIT_RTPRIO  14
-#define RLIMIT_NLIMITS 15
+#define RLIMIT_RTTIME  15
+#define RLIMIT_NLIMITS 16
 
 #define RLIM_NLIMITS RLIMIT_NLIMITS
 
@@ -104,6 +105,10 @@ int prlimit(pid_t, int, const struct rlimit *, struct rlimit *);
 #define rlim64_t rlim_t
 #endif
 
+#if _REDIR_TIME64
+__REDIR(getrusage, __getrusage_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/sys/select.h b/lib/libc/musl/include/sys/select.h
index d34cbf10d9..b3bab1d57b 100644
--- a/lib/libc/musl/include/sys/select.h
+++ b/lib/libc/musl/include/sys/select.h
@@ -35,6 +35,11 @@ int pselect (int, fd_set *__restrict, fd_set *__restrict, fd_set *__restrict, co
 #define NFDBITS (8*(int)sizeof(long))
 #endif
 
+#if _REDIR_TIME64
+__REDIR(select, __select_time64);
+__REDIR(pselect, __pselect_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/sys/sem.h b/lib/libc/musl/include/sys/sem.h
index 410c877446..a747784ede 100644
--- a/lib/libc/musl/include/sys/sem.h
+++ b/lib/libc/musl/include/sys/sem.h
@@ -25,8 +25,6 @@ extern "C" {
 #define SETVAL		16
 #define SETALL		17
 
-#include <endian.h>
-
 #include <bits/sem.h>
 
 #define _SEM_SEMUN_UNDEFINED 1
@@ -62,6 +60,12 @@ int semop(int, struct sembuf *, size_t);
 int semtimedop(int, struct sembuf *, size_t, const struct timespec *);
 #endif
 
+#if _REDIR_TIME64
+#ifdef _GNU_SOURCE
+__REDIR(semtimedop, __semtimedop_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/sys/socket.h b/lib/libc/musl/include/sys/socket.h
index 8692efa7ad..38f5bb17b3 100644
--- a/lib/libc/musl/include/sys/socket.h
+++ b/lib/libc/musl/include/sys/socket.h
@@ -19,6 +19,40 @@ extern "C" {
 
 #include <bits/socket.h>
 
+struct msghdr {
+	void *msg_name;
+	socklen_t msg_namelen;
+	struct iovec *msg_iov;
+#if __LONG_MAX > 0x7fffffff && __BYTE_ORDER == __BIG_ENDIAN
+	int __pad1;
+#endif
+	int msg_iovlen;
+#if __LONG_MAX > 0x7fffffff && __BYTE_ORDER == __LITTLE_ENDIAN
+	int __pad1;
+#endif
+	void *msg_control;
+#if __LONG_MAX > 0x7fffffff && __BYTE_ORDER == __BIG_ENDIAN
+	int __pad2;
+#endif
+	socklen_t msg_controllen;
+#if __LONG_MAX > 0x7fffffff && __BYTE_ORDER == __LITTLE_ENDIAN
+	int __pad2;
+#endif
+	int msg_flags;
+};
+
+struct cmsghdr {
+#if __LONG_MAX > 0x7fffffff && __BYTE_ORDER == __BIG_ENDIAN
+	int __pad1;
+#endif
+	socklen_t cmsg_len;
+#if __LONG_MAX > 0x7fffffff && __BYTE_ORDER == __LITTLE_ENDIAN
+	int __pad1;
+#endif
+	int cmsg_level;
+	int cmsg_type;
+};
+
 #ifdef _GNU_SOURCE
 struct ucred {
 	pid_t pid;
@@ -182,8 +216,6 @@ struct linger {
 #define SO_PEERCRED     17
 #define SO_RCVLOWAT     18
 #define SO_SNDLOWAT     19
-#define SO_RCVTIMEO     20
-#define SO_SNDTIMEO     21
 #define SO_ACCEPTCONN   30
 #define SO_PEERSEC      31
 #define SO_SNDBUFFORCE  32
@@ -192,6 +224,28 @@ struct linger {
 #define SO_DOMAIN       39
 #endif
 
+#ifndef SO_RCVTIMEO
+#if __LONG_MAX == 0x7fffffff
+#define SO_RCVTIMEO     66
+#define SO_SNDTIMEO     67
+#else
+#define SO_RCVTIMEO     20
+#define SO_SNDTIMEO     21
+#endif
+#endif
+
+#ifndef SO_TIMESTAMP
+#if __LONG_MAX == 0x7fffffff
+#define SO_TIMESTAMP    63
+#define SO_TIMESTAMPNS  64
+#define SO_TIMESTAMPING 65
+#else
+#define SO_TIMESTAMP    29
+#define SO_TIMESTAMPNS  35
+#define SO_TIMESTAMPING 37
+#endif
+#endif
+
 #define SO_SECURITY_AUTHENTICATION              22
 #define SO_SECURITY_ENCRYPTION_TRANSPORT        23
 #define SO_SECURITY_ENCRYPTION_NETWORK          24
@@ -203,14 +257,10 @@ struct linger {
 #define SO_GET_FILTER           SO_ATTACH_FILTER
 
 #define SO_PEERNAME             28
-#define SO_TIMESTAMP            29
 #define SCM_TIMESTAMP           SO_TIMESTAMP
-
 #define SO_PASSSEC              34
-#define SO_TIMESTAMPNS          35
 #define SCM_TIMESTAMPNS         SO_TIMESTAMPNS
 #define SO_MARK                 36
-#define SO_TIMESTAMPING         37
 #define SCM_TIMESTAMPING        SO_TIMESTAMPING
 #define SO_RXQ_OVFL             40
 #define SO_WIFI_STATUS          41
@@ -238,6 +288,7 @@ struct linger {
 #define SO_TXTIME               61
 #define SCM_TXTIME              SO_TXTIME
 #define SO_BINDTOIFINDEX        62
+#define SO_DETACH_REUSEPORT_BPF 68
 
 #ifndef SOL_SOCKET
 #define SOL_SOCKET      1
@@ -350,6 +401,12 @@ int setsockopt (int, int, int, const void *, socklen_t);
 
 int sockatmark (int);
 
+#if _REDIR_TIME64
+#ifdef _GNU_SOURCE
+__REDIR(recvmmsg, __recvmmsg_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/sys/stat.h b/lib/libc/musl/include/sys/stat.h
index 9d096624bc..10d446c463 100644
--- a/lib/libc/musl/include/sys/stat.h
+++ b/lib/libc/musl/include/sys/stat.h
@@ -110,6 +110,15 @@ int lchmod(const char *, mode_t);
 #define off64_t off_t
 #endif
 
+#if _REDIR_TIME64
+__REDIR(stat, __stat_time64);
+__REDIR(fstat, __fstat_time64);
+__REDIR(lstat, __lstat_time64);
+__REDIR(fstatat, __fstatat_time64);
+__REDIR(futimens, __futimens_time64);
+__REDIR(utimensat, __utimensat_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/sys/statvfs.h b/lib/libc/musl/include/sys/statvfs.h
index ef07d6846a..793490b6dc 100644
--- a/lib/libc/musl/include/sys/statvfs.h
+++ b/lib/libc/musl/include/sys/statvfs.h
@@ -11,8 +11,6 @@ extern "C" {
 #define __NEED_fsfilcnt_t
 #include <bits/alltypes.h>
 
-#include <endian.h>
-
 struct statvfs {
 	unsigned long f_bsize, f_frsize;
 	fsblkcnt_t f_blocks, f_bfree, f_bavail;
diff --git a/lib/libc/musl/include/sys/time.h b/lib/libc/musl/include/sys/time.h
index c5cab814c0..cdc67ef650 100644
--- a/lib/libc/musl/include/sys/time.h
+++ b/lib/libc/musl/include/sys/time.h
@@ -56,6 +56,20 @@ int adjtime (const struct timeval *, struct timeval *);
 	(void)0 )
 #endif
 
+#if _REDIR_TIME64
+__REDIR(gettimeofday, __gettimeofday_time64);
+__REDIR(getitimer, __getitimer_time64);
+__REDIR(setitimer, __setitimer_time64);
+__REDIR(utimes, __utimes_time64);
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+__REDIR(futimes, __futimes_time64);
+__REDIR(futimesat, __futimesat_time64);
+__REDIR(lutimes, __lutimes_time64);
+__REDIR(settimeofday, __settimeofday_time64);
+__REDIR(adjtime, __adjtime64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/sys/timeb.h b/lib/libc/musl/include/sys/timeb.h
index 108c1f5ccb..628239b7ed 100644
--- a/lib/libc/musl/include/sys/timeb.h
+++ b/lib/libc/musl/include/sys/timeb.h
@@ -4,6 +4,8 @@
 extern "C" {
 #endif
 
+#include <features.h>
+
 #define __NEED_time_t
 
 #include <bits/alltypes.h>
@@ -16,6 +18,10 @@ struct timeb {
 
 int ftime(struct timeb *);
 
+#if _REDIR_TIME64
+__REDIR(ftime, __ftime64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/sys/timerfd.h b/lib/libc/musl/include/sys/timerfd.h
index 2794d36a6c..1b832cdd8f 100644
--- a/lib/libc/musl/include/sys/timerfd.h
+++ b/lib/libc/musl/include/sys/timerfd.h
@@ -20,6 +20,11 @@ int timerfd_create(int, int);
 int timerfd_settime(int, int, const struct itimerspec *, struct itimerspec *);
 int timerfd_gettime(int, struct itimerspec *);
 
+#if _REDIR_TIME64
+__REDIR(timerfd_settime, __timerfd_settime64);
+__REDIR(timerfd_gettime, __timerfd_gettime64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/sys/timex.h b/lib/libc/musl/include/sys/timex.h
index 2e688880a8..8b417e1be2 100644
--- a/lib/libc/musl/include/sys/timex.h
+++ b/lib/libc/musl/include/sys/timex.h
@@ -91,6 +91,11 @@ struct timex {
 int adjtimex(struct timex *);
 int clock_adjtime(clockid_t, struct timex *);
 
+#if _REDIR_TIME64
+__REDIR(adjtimex, __adjtimex_time64);
+__REDIR(clock_adjtime, __clock_adjtime64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/sys/ttydefaults.h b/lib/libc/musl/include/sys/ttydefaults.h
index d251b715c6..edb55bc4d6 100644
--- a/lib/libc/musl/include/sys/ttydefaults.h
+++ b/lib/libc/musl/include/sys/ttydefaults.h
@@ -6,16 +6,11 @@
 #define TTYDEF_LFLAG (ECHO | ICANON | ISIG | IEXTEN | ECHOE|ECHOKE|ECHOCTL)
 #define TTYDEF_CFLAG (CREAD | CS7 | PARENB | HUPCL)
 #define TTYDEF_SPEED (B9600)
-#define CTRL(x) (x&037)
+#define CTRL(x) ((x)&037)
 #define CEOF CTRL('d')
 
-#ifdef _POSIX_VDISABLE
-#define CEOL _POSIX_VDISABLE
-#define CSTATUS _POSIX_VDISABLE
-#else
 #define CEOL '\0'
 #define CSTATUS '\0'
-#endif
 
 #define CERASE 0177
 #define CINTR CTRL('c')
diff --git a/lib/libc/musl/include/sys/wait.h b/lib/libc/musl/include/sys/wait.h
index 50c5c709a6..d4b1f2e185 100644
--- a/lib/libc/musl/include/sys/wait.h
+++ b/lib/libc/musl/include/sys/wait.h
@@ -13,7 +13,8 @@ extern "C" {
 typedef enum {
 	P_ALL = 0,
 	P_PID = 1,
-	P_PGID = 2
+	P_PGID = 2,
+	P_PIDFD = 3
 } idtype_t;
 
 pid_t wait (int *);
@@ -53,6 +54,13 @@ pid_t wait4 (pid_t, int *, int, struct rusage *);
 #define WIFSIGNALED(s) (((s)&0xffff)-1U < 0xffu)
 #define WIFCONTINUED(s) ((s) == 0xffff)
 
+#if _REDIR_TIME64
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+__REDIR(wait3, __wait3_time64);
+__REDIR(wait4, __wait4_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/threads.h b/lib/libc/musl/include/threads.h
index 8122b3b1df..52ec3100eb 100644
--- a/lib/libc/musl/include/threads.h
+++ b/lib/libc/musl/include/threads.h
@@ -80,6 +80,12 @@ void tss_delete(tss_t);
 int tss_set(tss_t, void *);
 void *tss_get(tss_t);
 
+#if _REDIR_TIME64
+__REDIR(thrd_sleep, __thrd_sleep_time64);
+__REDIR(mtx_timedlock, __mtx_timedlock_time64);
+__REDIR(cnd_timedwait, __cnd_timedwait_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/time.h b/lib/libc/musl/include/time.h
index 672b3fc3ee..5494df1836 100644
--- a/lib/libc/musl/include/time.h
+++ b/lib/libc/musl/include/time.h
@@ -130,6 +130,34 @@ int stime(const time_t *);
 time_t timegm(struct tm *);
 #endif
 
+#if _REDIR_TIME64
+__REDIR(time, __time64);
+__REDIR(difftime, __difftime64);
+__REDIR(mktime, __mktime64);
+__REDIR(gmtime, __gmtime64);
+__REDIR(localtime, __localtime64);
+__REDIR(ctime, __ctime64);
+__REDIR(timespec_get, __timespec_get_time64);
+#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
+ || defined(_BSD_SOURCE)
+__REDIR(gmtime_r, __gmtime64_r);
+__REDIR(localtime_r, __localtime64_r);
+__REDIR(ctime_r, __ctime64_r);
+__REDIR(nanosleep, __nanosleep_time64);
+__REDIR(clock_getres, __clock_getres_time64);
+__REDIR(clock_gettime, __clock_gettime64);
+__REDIR(clock_settime, __clock_settime64);
+__REDIR(clock_nanosleep, __clock_nanosleep_time64);
+__REDIR(timer_settime, __timer_settime64);
+__REDIR(timer_gettime, __timer_gettime64);
+#endif
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+__REDIR(stime, __stime64);
+__REDIR(timegm, __timegm_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/utime.h b/lib/libc/musl/include/utime.h
index dd5ff927c2..5755bd53ee 100644
--- a/lib/libc/musl/include/utime.h
+++ b/lib/libc/musl/include/utime.h
@@ -5,6 +5,8 @@
 extern "C" {
 #endif
 
+#include <features.h>
+
 #define __NEED_time_t
 
 #include <bits/alltypes.h>
@@ -16,6 +18,10 @@ struct utimbuf {
 
 int utime (const char *, const struct utimbuf *);
 
+#if _REDIR_TIME64
+__REDIR(utime, __utime64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/libc/musl/include/utmpx.h b/lib/libc/musl/include/utmpx.h
index 0429014d85..b293f427e6 100644
--- a/lib/libc/musl/include/utmpx.h
+++ b/lib/libc/musl/include/utmpx.h
@@ -16,6 +16,7 @@ extern "C" {
 
 struct utmpx {
 	short ut_type;
+	short __ut_pad1;
 	pid_t ut_pid;
 	char ut_line[32];
 	char ut_id[4];
@@ -25,7 +26,11 @@ struct utmpx {
 		short __e_termination;
 		short __e_exit;
 	} ut_exit;
-	long ut_session;
+#if __BYTE_ORDER == 1234
+	int ut_session, __ut_pad2;
+#else
+	int __ut_pad2, ut_session;
+#endif
 	struct timeval ut_tv;
 	unsigned ut_addr_v6[4];
 	char __unused[20];
diff --git a/lib/libc/musl/src/aio/aio_suspend.c b/lib/libc/musl/src/aio/aio_suspend.c
index 9b24b6af24..34b66f8787 100644
--- a/lib/libc/musl/src/aio/aio_suspend.c
+++ b/lib/libc/musl/src/aio/aio_suspend.c
@@ -73,4 +73,6 @@ int aio_suspend(const struct aiocb *const cbs[], int cnt, const struct timespec
 	}
 }
 
+#if !_REDIR_TIME64
 weak_alias(aio_suspend, aio_suspend64);
+#endif
diff --git a/lib/libc/musl/src/complex/cacosh.c b/lib/libc/musl/src/complex/cacosh.c
index 8e42f1ae86..76127f75f4 100644
--- a/lib/libc/musl/src/complex/cacosh.c
+++ b/lib/libc/musl/src/complex/cacosh.c
@@ -4,6 +4,9 @@
 
 double complex cacosh(double complex z)
 {
+	int zineg = signbit(cimag(z));
+
 	z = cacos(z);
-	return CMPLX(-cimag(z), creal(z));
+	if (zineg) return CMPLX(cimag(z), -creal(z));
+	else       return CMPLX(-cimag(z), creal(z));
 }
diff --git a/lib/libc/musl/src/complex/cacoshf.c b/lib/libc/musl/src/complex/cacoshf.c
index d7e6b54547..8bd80581ae 100644
--- a/lib/libc/musl/src/complex/cacoshf.c
+++ b/lib/libc/musl/src/complex/cacoshf.c
@@ -2,6 +2,9 @@
 
 float complex cacoshf(float complex z)
 {
+	int zineg = signbit(cimagf(z));
+
 	z = cacosf(z);
-	return CMPLXF(-cimagf(z), crealf(z));
+	if (zineg) return CMPLXF(cimagf(z), -crealf(z));
+	else       return CMPLXF(-cimagf(z), crealf(z));
 }
diff --git a/lib/libc/musl/src/complex/cacoshl.c b/lib/libc/musl/src/complex/cacoshl.c
index d3eaee204f..3a284be9c6 100644
--- a/lib/libc/musl/src/complex/cacoshl.c
+++ b/lib/libc/musl/src/complex/cacoshl.c
@@ -8,7 +8,10 @@ long double complex cacoshl(long double complex z)
 #else
 long double complex cacoshl(long double complex z)
 {
+	int zineg = signbit(cimagl(z));
+
 	z = cacosl(z);
-	return CMPLXL(-cimagl(z), creall(z));
+	if (zineg) return CMPLXL(cimagl(z), -creall(z));
+	else       return CMPLXL(-cimagl(z), creall(z));
 }
 #endif
diff --git a/lib/libc/musl/src/complex/catanf.c b/lib/libc/musl/src/complex/catanf.c
index e10d9c0934..ef3907a506 100644
--- a/lib/libc/musl/src/complex/catanf.c
+++ b/lib/libc/musl/src/complex/catanf.c
@@ -87,29 +87,17 @@ float complex catanf(float complex z)
 	x = crealf(z);
 	y = cimagf(z);
 
-	if ((x == 0.0f) && (y > 1.0f))
-		goto ovrf;
-
 	x2 = x * x;
 	a = 1.0f - x2 - (y * y);
-	if (a == 0.0f)
-		goto ovrf;
 
 	t = 0.5f * atan2f(2.0f * x, a);
 	w = _redupif(t);
 
 	t = y - 1.0f;
 	a = x2 + (t * t);
-	if (a == 0.0f)
-		goto ovrf;
 
 	t = y + 1.0f;
 	a = (x2 + (t * t))/a;
-	w = w + (0.25f * logf (a)) * I;
-	return w;
-
-ovrf:
-	// FIXME
-	w = MAXNUMF + MAXNUMF * I;
+	w = CMPLXF(w, 0.25f * logf(a));
 	return w;
 }
diff --git a/lib/libc/musl/src/complex/catanl.c b/lib/libc/musl/src/complex/catanl.c
index a9fc02db03..e62526c006 100644
--- a/lib/libc/musl/src/complex/catanl.c
+++ b/lib/libc/musl/src/complex/catanl.c
@@ -97,30 +97,18 @@ long double complex catanl(long double complex z)
 	x = creall(z);
 	y = cimagl(z);
 
-	if ((x == 0.0L) && (y > 1.0L))
-		goto ovrf;
-
 	x2 = x * x;
 	a = 1.0L - x2 - (y * y);
-	if (a == 0.0L)
-		goto ovrf;
 
 	t = atan2l(2.0L * x, a) * 0.5L;
 	w = redupil(t);
 
 	t = y - 1.0L;
 	a = x2 + (t * t);
-	if (a == 0.0L)
-		goto ovrf;
 
 	t = y + 1.0L;
 	a = (x2 + (t * t)) / a;
-	w = w + (0.25L * logl(a)) * I;
-	return w;
-
-ovrf:
-	// FIXME
-	w = LDBL_MAX + LDBL_MAX * I;
+	w = CMPLXF(w, 0.25L * logl(a));
 	return w;
 }
 #endif
diff --git a/lib/libc/musl/src/ctype/alpha.h b/lib/libc/musl/src/ctype/alpha.h
index 299277c71c..4167f3876c 100644
--- a/lib/libc/musl/src/ctype/alpha.h
+++ b/lib/libc/musl/src/ctype/alpha.h
@@ -8,17 +8,17 @@
 17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,
 17,17,17,17,17,17,17,63,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
 16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,17,64,65,17,66,67,
-68,69,70,71,72,73,74,17,75,76,77,78,79,80,16,16,16,81,82,83,84,85,86,87,88,89,
-16,90,16,91,92,16,16,17,17,17,93,94,95,16,16,16,16,16,16,16,16,16,16,17,17,17,
-17,96,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,17,17,97,16,16,16,16,16,16,
+68,69,70,71,72,73,74,17,75,76,77,78,79,80,81,16,82,83,84,85,86,87,88,89,90,91,
+92,93,16,94,95,96,16,17,17,17,97,98,99,16,16,16,16,16,16,16,16,16,16,17,17,17,
+17,100,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,17,17,101,16,16,16,16,16,
 16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
-16,17,17,98,99,16,16,16,100,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,
-17,17,17,17,17,17,17,101,17,17,102,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
-16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,17,103,
-104,16,16,16,16,16,16,16,16,16,105,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
-16,16,16,16,16,16,16,16,16,106,107,108,109,16,16,16,16,16,16,16,16,110,16,16,
-16,16,16,16,16,111,112,16,16,16,16,113,16,16,114,16,16,16,16,16,16,16,16,16,
-16,16,16,16,
+16,16,17,17,102,103,16,16,104,105,17,17,17,17,17,17,17,17,17,17,17,17,17,17,
+17,17,17,17,17,17,17,17,17,106,17,17,107,16,16,16,16,16,16,16,16,16,16,16,16,
+16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,17,
+108,109,16,16,16,16,16,16,16,16,16,110,16,16,16,16,16,16,16,16,16,16,16,16,16,
+16,16,16,16,16,16,16,16,16,16,111,112,113,114,16,16,16,16,16,16,16,16,115,116,
+117,16,16,16,16,16,118,119,16,16,16,16,120,16,16,121,16,16,16,16,16,16,16,16,
+16,16,16,16,16,
 16,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,
 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
 255,255,255,255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0,254,255,255,7,254,
@@ -27,8 +27,8 @@
 255,195,255,3,0,31,80,0,0,0,0,0,0,0,0,0,0,32,0,0,0,0,0,223,188,64,215,255,255,
 251,255,255,255,255,255,255,255,255,255,191,255,255,255,255,255,255,255,255,
 255,255,255,255,255,255,255,255,255,3,252,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,255,255,255,254,255,255,255,127,2,254,255,255,
-255,255,0,0,0,0,0,255,191,182,0,255,255,255,7,7,0,0,0,255,7,255,255,255,255,
+255,255,255,255,255,255,255,255,255,255,255,254,255,255,255,127,2,255,255,255,
+255,255,1,0,0,0,0,255,191,182,0,255,255,255,135,7,0,0,0,255,7,255,255,255,255,
 255,255,255,254,255,195,255,255,255,255,255,255,255,255,255,255,255,255,239,
 31,254,225,255,
 159,0,0,255,255,255,255,255,255,0,224,255,255,255,255,255,255,255,255,255,255,
@@ -42,54 +42,55 @@
 255,0,0,239,223,253,255,255,253,239,227,223,29,96,64,207,255,6,0,239,223,253,
 255,255,255,255,231,223,93,240,128,207,255,0,252,236,255,127,252,255,255,251,
 47,127,128,95,255,192,255,12,0,254,255,255,255,255,127,255,7,63,32,255,3,0,0,
-0,0,150,37,240,254,174,236,255,59,95,32,255,243,0,0,0,
+0,0,214,247,255,255,175,255,255,59,95,32,255,243,0,0,0,
 0,1,0,0,0,255,3,0,0,255,254,255,255,255,31,254,255,3,255,255,254,255,255,255,
-31,0,0,0,0,0,0,0,0,255,255,255,255,255,255,127,249,255,3,255,255,231,193,255,
-255,127,64,255,51,255,255,255,255,191,32,255,255,255,255,255,247,255,255,255,
+31,0,0,0,0,0,0,0,0,255,255,255,255,255,255,127,249,255,3,255,255,255,255,255,
+255,255,255,255,63,255,255,255,255,191,32,255,255,255,255,255,247,255,255,255,
 255,255,255,255,255,255,61,127,61,255,255,255,255,255,61,255,255,255,255,61,
 127,61,255,127,255,255,255,255,255,255,255,61,255,255,255,255,255,255,255,255,
-135,0,0,0,0,255,255,0,0,255,255,255,255,255,255,255,255,255,255,63,63,254,255,
+7,0,0,0,0,255,255,0,0,255,255,255,255,255,255,255,255,255,255,63,63,254,255,
 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
 255,255,255,255,255,159,255,255,254,255,255,7,255,255,255,255,255,255,255,255,
 255,199,255,1,255,223,15,0,255,255,15,0,255,255,15,0,255,223,13,0,255,255,255,
 255,255,255,207,255,255,1,128,16,255,3,0,0,0,0,255,3,255,255,255,255,255,255,
-255,255,255,255,255,0,255,255,255,255,255,7,255,255,255,255,255,255,255,255,
+255,255,255,255,255,1,255,255,255,255,255,7,255,255,255,255,255,255,255,255,
 63,
 0,255,255,255,127,255,15,255,1,192,255,255,255,255,63,31,0,255,255,255,255,
 255,15,255,255,255,3,255,3,0,0,0,0,255,255,255,15,255,255,255,255,255,255,255,
 127,254,255,31,0,255,3,255,3,128,0,0,0,0,0,0,0,0,0,0,0,255,255,255,255,255,
 255,239,255,239,15,255,3,0,0,0,0,255,255,255,255,255,243,255,255,255,255,255,
-255,191,255,3,0,255,255,255,255,255,255,63,0,255,227,255,255,255,255,255,63,
-255,1,0,0,0,0,0,0,0,0,0,0,0,222,111,0,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,0,0,0,0,128,255,31,0,
-255,255,63,63,255,255,255,255,63,63,255,170,255,255,255,63,255,255,255,255,
-255,255,223,95,220,31,207,15,255,31,220,31,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,128,
-0,0,255,31,0,0,0,0,0,0,0,0,0,0,0,0,132,252,47,62,80,189,255,243,224,67,0,0,
-255,255,255,255,255,1,0,0,0,0,0,0,0,0,0,0,0,0,0,
+255,191,255,3,0,255,255,255,255,255,255,127,0,255,227,255,255,255,255,255,63,
+255,1,255,255,255,255,255,231,0,0,0,0,0,222,111,4,255,255,255,255,255,255,255,
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,0,0,0,0,
+128,255,31,0,255,255,63,63,255,255,255,255,63,63,255,170,255,255,255,63,255,
+255,255,255,255,255,223,95,220,31,207,15,255,31,220,31,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,2,128,0,0,255,31,0,0,0,0,0,0,0,0,0,0,0,0,132,252,47,62,80,189,255,243,
+224,67,0,0,255,255,255,255,255,1,0,0,0,0,0,0,0,0,0,0,0,0,0,
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,192,255,255,255,255,255,255,3,0,
 0,255,255,255,255,255,127,255,255,255,255,255,127,255,255,255,255,255,255,255,
 255,255,255,255,255,255,255,255,255,31,120,12,0,255,255,255,255,191,32,255,
 255,255,255,255,255,255,128,0,0,255,255,127,0,127,127,127,127,127,127,127,127,
 255,255,255,255,0,0,0,0,0,128,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 0,0,224,0,0,0,254,3,62,31,254,255,255,255,255,255,255,255,255,255,127,224,254,
-255,255,255,255,255,255,255,255,255,255,247,224,255,255,255,255,127,254,255,
+255,255,255,255,255,255,255,255,255,255,247,224,255,255,255,255,255,254,255,
 255,255,255,255,255,255,255,255,255,127,0,0,255,255,255,7,0,0,0,0,0,0,255,255,
 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
 255,255,255,63,0,0,0,0,0,0,0,0,0,255,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,7,0,
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,0,
 0,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,31,0,0,
 0,0,0,0,0,0,255,255,255,255,255,63,255,31,255,255,255,15,0,0,255,255,255,255,
 255,127,240,143,255,255,255,255,255,255,255,255,255,255,255,255,255,255,0,0,0,
 0,128,255,252,255,255,255,255,255,255,255,255,255,255,255,255,249,255,255,255,
-127,255,0,0,0,0,0,0,0,128,255,187,247,255,255,255,0,0,0,255,255,255,255,255,
-255,15,0,255,255,255,255,255,255,255,255,47,0,255,3,0,0,252,40,255,255,255,
-255,255,7,255,255,255,255,7,0,255,255,255,31,255,255,255,255,255,255,247,255,
-0,128,255,3,223,255,255,127,255,255,255,255,255,255,127,0,255,63,255,3,255,
-255,127,196,255,255,255,255,255,255,255,127,5,0,0,56,255,255,60,0,126,126,126,
-0,127,127,255,255,255,255,255,247,63,0,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,7,255,3,255,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,255,15,0,255,255,127,248,255,255,255,255,255,
+255,255,255,124,0,0,0,0,0,128,255,191,255,255,255,255,0,0,0,255,255,255,255,
+255,255,15,0,255,255,255,255,255,255,255,255,47,0,255,3,0,0,252,232,255,255,
+255,255,255,7,255,255,255,255,7,0,255,255,255,31,255,255,255,255,255,255,247,
+255,0,128,255,3,255,255,255,127,255,255,255,255,255,255,127,0,255,63,255,3,
+255,255,127,252,255,255,255,255,255,255,255,127,5,0,0,56,255,255,60,0,126,126,
+126,0,127,127,255,255,255,255,255,247,255,0,255,255,255,255,255,255,255,255,
+255,255,255,255,255,255,255,7,255,3,255,255,255,255,255,255,255,255,255,255,
+255,255,255,255,255,255,255,255,255,255,15,0,255,255,127,248,255,255,255,255,
+255,
 15,255,255,255,255,255,255,255,255,255,255,255,255,255,63,255,255,255,255,255,
 255,255,255,255,255,255,255,255,3,0,0,0,0,127,0,248,224,255,253,127,95,219,
 255,255,255,255,255,255,255,255,255,255,255,255,255,3,0,0,0,248,255,255,255,
@@ -109,55 +110,63 @@
 0,0,0,0,0,0,0,0,0,0,0,0,63,253,255,255,255,255,191,145,255,255,63,0,255,255,
 127,0,255,255,255,127,0,0,0,0,0,0,0,0,255,255,55,0,255,255,63,0,255,255,255,3,
 0,0,0,0,0,0,0,0,255,255,255,255,255,255,255,192,0,0,0,0,0,0,0,0,111,240,239,
-254,255,255,15,0,0,0,0,0,255,255,255,31,255,255,255,31,0,0,0,0,255,254,255,
+254,255,255,63,0,0,0,0,0,255,255,255,31,255,255,255,31,0,0,0,0,255,254,255,
 255,31,0,0,0,255,255,255,255,255,255,63,0,255,255,63,0,255,255,7,0,255,255,3,
 0,0,0,0,0,0,0,0,0,0,0,0,
 0,255,255,255,255,255,255,255,255,255,1,0,0,0,0,0,0,255,255,255,255,255,255,7,
-0,255,255,255,255,255,255,7,0,255,255,255,255,255,255,255,255,63,0,0,0,192,
-255,0,0,252,255,255,255,255,255,255,1,0,0,255,255,255,1,255,3,255,255,255,255,
-255,255,199,255,0,0,255,255,255,255,71,0,255,255,255,255,255,255,255,255,30,0,
-255,23,0,0,0,0,255,255,251,255,255,255,159,64,0,0,0,0,0,0,0,0,127,189,255,191,
-255,1,255,255,255,255,255,255,255,1,255,3,239,159,249,255,255,253,237,227,159,
-25,129,224,15,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,255,255,255,255,
-255,255,187,7,255,3,0,0,0,0,255,255,255,255,255,255,255,255,179,0,255,3,0,0,0,
+0,255,255,255,255,255,255,7,0,255,255,255,255,255,0,255,3,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,255,31,128,0,255,255,63,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,255,255,127,0,255,255,255,255,255,255,255,255,63,0,0,0,
+192,255,0,0,252,255,255,255,255,255,255,1,0,0,255,255,255,1,255,3,255,255,255,
+255,255,255,199,255,112,0,255,255,255,255,71,0,255,255,255,255,255,255,255,
+255,30,0,255,23,0,0,0,0,255,255,251,255,255,255,159,64,0,0,0,0,0,0,0,0,127,
+189,255,191,255,1,255,255,255,255,255,255,255,1,255,3,239,159,249,255,255,253,
+237,227,159,25,129,224,15,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,255,
+255,255,255,255,255,187,7,255,131,0,0,0,0,255,255,255,255,255,255,255,255,179,
+0,255,3,0,0,0,
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,255,255,255,255,63,127,0,0,0,63,0,0,
 0,0,255,255,255,255,255,255,255,127,17,0,255,3,0,0,0,0,255,255,255,255,255,
-255,63,0,255,3,0,0,0,0,0,
-0,255,255,255,227,255,7,255,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,255,255,255,255,255,255,255,3,
-0,128,255,255,255,255,255,255,231,127,0,0,255,255,255,255,255,255,207,255,255,
-0,0,0,0,0,255,255,255,255,255,255,255,1,255,253,255,255,255,255,127,127,1,0,
-255,3,0,0,252,255,255,255,252,255,255,254,127,0,0,0,0,0,0,0,0,0,127,251,255,
-255,255,255,127,180,203,0,255,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,
+255,63,1,255,3,0,0,0,0,0,0,255,255,255,231,255,7,255,3,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,255,255,255,255,255,1,0,0,0,0,0,0,0,0,0,0,0,
+0,255,255,255,255,255,255,255,255,255,3,0,128,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,255,252,255,255,255,255,255,252,26,0,0,0,255,255,255,255,255,255,231,
+127,0,0,255,255,255,255,255,255,255,255,255,32,0,0,0,0,255,255,255,255,255,
+255,255,1,255,253,255,255,255,255,127,127,1,0,255,3,0,0,252,255,255,255,252,
+255,255,254,127,0,0,0,0,0,0,0,0,0,127,251,255,255,255,255,127,180,203,0,255,3,
+191,253,255,255,255,127,123,1,255,3,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,127,0,255,
 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,3,0,0,
 0,0,0,0,0,0,0,0,0,0,255,255,255,255,255,255,255,255,255,255,255,255,255,127,0,
 0,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,15,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,255,255,255,255,255,127,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-255,255,255,255,255,255,255,255,127,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,255,255,255,255,255,255,255,1,255,255,255,127,255,3,0,0,0,0,0,0,0,0,0,0,0,
-0,255,255,255,63,0,0,255,255,255,255,255,255,127,0,15,0,255,3,248,255,255,224,
-255,255,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,255,255,255,255,255,255,31,0,255,
-255,255,255,255,127,0,0,248,255,0,0,0,0,0,0,0,0,3,0,0,0,255,255,255,255,255,
+255,255,255,255,255,15,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,
+255,255,255,127,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,
+255,255,255,255,255,255,127,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,
+255,255,255,255,255,255,1,255,255,255,127,255,3,0,0,0,0,0,0,0,0,0,0,0,0,255,
+255,255,63,0,0,255,255,255,255,255,255,0,0,15,0,255,3,248,255,255,224,255,255,
+0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,255,255,255,255,255,255,255,255,255,135,255,255,255,255,255,255,255,128,
+255,255,0,0,0,0,0,0,0,0,11,0,0,0,255,255,255,255,255,255,255,255,255,255,255,
 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,31,0,0,255,255,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,7,0,
-255,255,255,127,0,0,0,0,0,0,0,0,0,0,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,
+255,0,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
+255,255,255,255,255,255,255,255,255,255,255,255,7,0,255,255,255,127,0,0,0,0,0,
+0,7,0,240,0,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,255,255,255,255,255,15,255,255,255,255,255,
-255,255,255,255,255,255,255,255,7,255,31,255,1,255,67,0,0,0,0,0,0,0,0,0,0,0,0,
-255,255,255,255,255,255,255,255,255,255,223,255,255,255,255,255,255,255,255,
-223,100,222,255,235,239,255,255,255,255,255,255,255,191,231,223,223,255,255,
-255,123,95,252,253,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,15,255,255,255,255,
+255,255,255,255,255,255,255,255,255,7,255,31,255,1,255,67,0,0,0,0,0,0,0,0,0,0,
+0,0,255,255,255,255,255,255,255,255,255,255,223,255,255,255,255,255,255,255,
+255,223,100,222,255,235,239,255,255,255,255,255,255,
+255,191,231,223,223,255,255,255,123,95,252,253,255,255,255,255,255,255,255,
 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,63,255,255,255,253,255,255,247,255,255,255,
-247,255,255,223,255,255,255,223,255,255,127,255,255,255,127,255,255,255,253,
-255,255,255,253,255,255,247,207,255,255,255,255,255,255,127,255,255,249,219,7,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,31,0,
-0,0,0,0,0,
-0,255,255,255,255,255,255,255,255,143,0,255,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,239,255,255,255,150,254,247,10,132,234,150,170,150,247,247,94,255,251,
-255,15,238,251,255,15,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,255,3,255,255,255,3,
-255,255,255,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,63,255,255,255,
+253,255,255,247,255,255,255,247,255,255,223,255,255,255,223,255,255,127,255,
+255,255,127,255,255,255,253,255,255,255,253,255,255,247,207,255,255,255,255,
+255,255,127,255,255,249,219,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,255,255,255,255,255,31,128,63,255,67,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,255,255,255,
+15,255,3,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
+255,255,255,255,255,255,255,31,0,0,0,0,0,0,0,255,255,255,255,255,255,255,255,
+143,8,255,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,239,255,255,255,150,254,247,10,132,234,150,170,150,247,247,94,255,251,255,
+15,238,251,255,15,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,255,3,255,255,255,3,255,
+255,255,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
diff --git a/lib/libc/musl/src/ctype/casemap.h b/lib/libc/musl/src/ctype/casemap.h
new file mode 100644
index 0000000000..6ee1209b96
--- /dev/null
+++ b/lib/libc/musl/src/ctype/casemap.h
@@ -0,0 +1,297 @@
+static const unsigned char tab[] = {
+	7, 8, 9, 10, 11, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	13, 6, 6, 14, 6, 6, 6, 6, 6, 6, 6, 6, 15, 16, 17, 18,
+	6, 19, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 20, 21, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 22, 23, 6, 6, 6, 24, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 25,
+	6, 6, 6, 6, 26, 6, 6, 6, 6, 6, 6, 6, 27, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 28, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 29, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 30, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 36,
+	43, 43, 43, 43, 43, 43, 43, 43, 1, 0, 84, 86, 86, 86, 86, 86,
+	86, 86, 86, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 24, 0, 0, 0, 43, 43, 43, 43, 43, 43,
+	43, 7, 43, 43, 91, 86, 86, 86, 86, 86, 86, 86, 74, 86, 86, 5,
+	49, 80, 49, 80, 49, 80, 49, 80, 49, 80, 49, 80, 49, 80, 49, 80,
+	36, 80, 121, 49, 80, 49, 80, 49, 56, 80, 49, 80, 49, 80, 49, 80,
+	49, 80, 49, 80, 49, 80, 49, 80, 78, 49, 2, 78, 13, 13, 78, 3,
+	78, 0, 36, 110, 0, 78, 49, 38, 110, 81, 78, 36, 80, 78, 57, 20,
+	129, 27, 29, 29, 83, 49, 80, 49, 80, 13, 49, 80, 49, 80, 49, 80,
+	27, 83, 36, 80, 49, 2, 92, 123, 92, 123, 92, 123, 92, 123, 92, 123,
+	20, 121, 92, 123, 92, 123, 92, 45, 43, 73, 3, 72, 3, 120, 92, 123,
+	20, 0, 150, 10, 1, 43, 40, 6, 6, 0, 42, 6, 42, 42, 43, 7,
+	187, 181, 43, 30, 0, 43, 7, 43, 43, 43, 1, 43, 43, 43, 43, 43,
+	43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43,
+	43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 1, 43, 43, 43, 43,
+	43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43,
+	43, 43, 43, 42, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43,
+	43, 205, 70, 205, 43, 0, 37, 43, 7, 1, 6, 1, 85, 86, 86, 86,
+	86, 86, 85, 86, 86, 2, 36, 129, 129, 129, 129, 129, 21, 129, 129, 129,
+	0, 0, 43, 0, 178, 209, 178, 209, 178, 209, 178, 209, 0, 0, 205, 204,
+	1, 0, 215, 215, 215, 215, 215, 131, 129, 129, 129, 129, 129, 129, 129, 129,
+	129, 129, 172, 172, 172, 172, 172, 172, 172, 172, 172, 172, 28, 0, 0, 0,
+	0, 0, 49, 80, 49, 80, 49, 80, 49, 80, 49, 80, 49, 2, 0, 0,
+	49, 80, 49, 80, 49, 80, 49, 80, 49, 80, 49, 80, 49, 80, 49, 80,
+	49, 80, 78, 49, 80, 49, 80, 78, 49, 80, 49, 80, 49, 80, 49, 80,
+	49, 80, 49, 80, 49, 80, 49, 2, 135, 166, 135, 166, 135, 166, 135, 166,
+	135, 166, 135, 166, 135, 166, 135, 166, 42, 43, 43, 43, 43, 43, 43, 43,
+	43, 43, 43, 43, 43, 0, 0, 0, 84, 86, 86, 86, 86, 86, 86, 86,
+	86, 86, 86, 86, 86, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 84, 86, 86, 86, 86, 86, 86, 86, 86, 86, 86, 86, 86,
+	12, 0, 12, 42, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43,
+	43, 7, 42, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 42, 43, 43, 43, 43, 43, 43,
+	43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43,
+	43, 43, 43, 43, 86, 86, 108, 129, 21, 0, 43, 43, 43, 43, 43, 43,
+	43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43,
+	43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43,
+	43, 43, 43, 43, 7, 108, 3, 65, 43, 43, 86, 86, 86, 86, 86, 86,
+	86, 86, 86, 86, 86, 86, 86, 86, 44, 86, 43, 43, 43, 43, 43, 43,
+	43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 1,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 12, 108, 0, 0, 0, 0, 0, 6,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 6, 37, 6, 37, 6, 37, 6, 37, 6, 37,
+	6, 37, 6, 37, 6, 37, 6, 37, 6, 37, 6, 37, 6, 37, 6, 37,
+	6, 37, 6, 37, 6, 37, 6, 37, 6, 37, 6, 37, 6, 37, 6, 37,
+	6, 37, 6, 37, 6, 37, 6, 37, 86, 122, 158, 38, 6, 37, 6, 37,
+	6, 37, 6, 37, 6, 37, 6, 37, 6, 37, 6, 37, 6, 37, 6, 37,
+	6, 37, 6, 37, 6, 37, 6, 37, 6, 37, 6, 1, 43, 43, 79, 86,
+	86, 44, 43, 127, 86, 86, 57, 43, 43, 85, 86, 86, 43, 43, 79, 86,
+	86, 44, 43, 127, 86, 86, 129, 55, 117, 91, 123, 92, 43, 43, 79, 86,
+	86, 2, 172, 4, 0, 0, 57, 43, 43, 85, 86, 86, 43, 43, 79, 86,
+	86, 44, 43, 43, 86, 86, 50, 19, 129, 87, 0, 111, 129, 126, 201, 215,
+	126, 45, 129, 129, 14, 126, 57, 127, 111, 87, 0, 129, 129, 126, 21, 0,
+	126, 3, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 7, 43,
+	36, 43, 151, 43, 43, 43, 43, 43, 43, 43, 43, 43, 42, 43, 43, 43,
+	43, 43, 86, 86, 86, 86, 86, 128, 129, 129, 129, 129, 57, 187, 42, 43,
+	43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43,
+	43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43,
+	43, 43, 43, 43, 43, 43, 43, 1, 129, 129, 129, 129, 129, 129, 129, 129,
+	129, 129, 129, 129, 129, 129, 129, 201, 172, 172, 172, 172, 172, 172, 172, 172,
+	172, 172, 172, 172, 172, 172, 172, 208, 13, 0, 78, 49, 2, 180, 193, 193,
+	215, 215, 36, 80, 49, 80, 49, 80, 49, 80, 49, 80, 49, 80, 49, 80,
+	49, 80, 49, 80, 49, 80, 49, 80, 49, 80, 49, 80, 49, 80, 49, 80,
+	49, 80, 49, 80, 215, 215, 83, 193, 71, 212, 215, 215, 215, 5, 43, 43,
+	43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 7, 1, 0, 1, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 78, 49, 80, 49, 80, 49, 80,
+	49, 80, 49, 80, 49, 80, 49, 80, 13, 0, 0, 0, 0, 0, 36, 80,
+	49, 80, 49, 80, 49, 80, 49, 80, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 43, 43, 43, 43, 43, 43,
+	43, 43, 43, 43, 43, 121, 92, 123, 92, 123, 79, 123, 92, 123, 92, 123,
+	92, 123, 92, 123, 92, 123, 92, 123, 92, 123, 92, 123, 92, 123, 92, 45,
+	43, 43, 121, 20, 92, 123, 92, 45, 121, 42, 92, 39, 92, 123, 92, 123,
+	92, 123, 164, 0, 10, 180, 92, 123, 92, 123, 79, 3, 42, 43, 43, 43,
+	43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 1,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 72, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 42, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43,
+	43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 43, 43, 43, 43, 43, 43, 43, 43, 7, 0, 72, 86, 86, 86, 86,
+	86, 86, 86, 86, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 43, 43, 43, 43,
+	43, 43, 43, 43, 43, 43, 43, 43, 43, 85, 86, 86, 86, 86, 86, 86,
+	86, 86, 86, 86, 86, 86, 14, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 36, 43, 43, 43, 43, 43, 43, 43, 43, 43,
+	43, 43, 7, 0, 86, 86, 86, 86, 86, 86, 86, 86, 86, 86, 86, 86,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 36, 43, 43, 43,
+	43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 7, 0, 0,
+	0, 0, 86, 86, 86, 86, 86, 86, 86, 86, 86, 86, 86, 86, 86, 86,
+	86, 86, 86, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 42, 43, 43,
+	43, 43, 43, 43, 43, 43, 43, 43, 86, 86, 86, 86, 86, 86, 86, 86,
+	86, 86, 14, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 42, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 86, 86,
+	86, 86, 86, 86, 86, 86, 86, 86, 14, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 85,
+	86, 86, 86, 86, 86, 86, 86, 86, 86, 86, 14, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+};
+static const int rules[] = {
+	0x0, 0x2001, -0x2000, 0x1dbf00, 0x2e700, 0x7900,
+	0x2402, 0x101, -0x100, 0x0, 0x201, -0x200,
+	-0xc6ff, -0xe800, -0x78ff, -0x12c00, 0xc300, 0xd201,
+	0xce01, 0xcd01, 0x4f01, 0xca01, 0xcb01, 0xcf01,
+	0x6100, 0xd301, 0xd101, 0xa300, 0xd501, 0x8200,
+	0xd601, 0xda01, 0xd901, 0xdb01, 0x3800, 0x3,
+	-0x4f00, -0x60ff, -0x37ff, 0x242802, 0x0, 0x101,
+	-0x100, -0xcd00, -0xda00, -0x81ff, 0x2a2b01, -0xa2ff,
+	0x2a2801, 0x2a3f00, -0xc2ff, 0x4501, 0x4701, 0x2a1f00,
+	0x2a1c00, 0x2a1e00, -0xd200, -0xce00, -0xca00, -0xcb00,
+	0xa54f00, 0xa54b00, -0xcf00, 0xa52800, 0xa54400, -0xd100,
+	-0xd300, 0x29f700, 0xa54100, 0x29fd00, -0xd500, -0xd600,
+	0x29e700, 0xa54300, 0xa52a00, -0x4500, -0xd900, -0x4700,
+	-0xdb00, 0xa51500, 0xa51200, 0x4c2402, 0x0, 0x2001,
+	-0x2000, 0x101, -0x100, 0x5400, 0x7401, 0x2601,
+	0x2501, 0x4001, 0x3f01, -0x2600, -0x2500, -0x1f00,
+	-0x4000, -0x3f00, 0x801, -0x3e00, -0x3900, -0x2f00,
+	-0x3600, -0x800, -0x5600, -0x5000, 0x700, -0x7400,
+	-0x3bff, -0x6000, -0x6ff, 0x701a02, 0x101, -0x100,
+	0x2001, -0x2000, 0x5001, 0xf01, -0xf00, 0x0,
+	0x3001, -0x3000, 0x101, -0x100, 0x0, 0xbc000,
+	0x1c6001, 0x0, 0x97d001, 0x801, -0x800, 0x8a0502,
+	0x0, -0xbbfff, -0x186200, 0x89c200, -0x182500, -0x186e00,
+	-0x186d00, -0x186400, -0x186300, -0x185c00, 0x0, 0x8a3800,
+	0x8a0400, 0xee600, 0x101, -0x100, 0x0, -0x3b00,
+	-0x1dbeff, 0x8f1d02, 0x800, -0x7ff, 0x0, 0x5600,
+	-0x55ff, 0x4a00, 0x6400, 0x8000, 0x7000, 0x7e00,
+	0x900, -0x49ff, -0x8ff, -0x1c2500, -0x63ff, -0x6fff,
+	-0x7fff, -0x7dff, 0xac0502, 0x0, 0x1001, -0x1000,
+	0x1c01, 0x101, -0x1d5cff, -0x20beff, -0x2045ff, -0x1c00,
+	0xb10b02, 0x101, -0x100, 0x3001, -0x3000, 0x0,
+	-0x29f6ff, -0xee5ff, -0x29e6ff, -0x2a2b00, -0x2a2800, -0x2a1bff,
+	-0x29fcff, -0x2a1eff, -0x2a1dff, -0x2a3eff, 0x0, -0x1c6000,
+	0x0, 0x101, -0x100, 0xbc0c02, 0x0, 0x101,
+	-0x100, -0xa543ff, 0x3a001, -0x8a03ff, -0xa527ff, 0x3000,
+	-0xa54eff, -0xa54aff, -0xa540ff, -0xa511ff, -0xa529ff, -0xa514ff,
+	-0x2fff, -0xa542ff, -0x8a37ff, 0x0, -0x97d000, -0x3a000,
+	0x0, 0x2001, -0x2000, 0x0, 0x2801, -0x2800,
+	0x0, 0x4001, -0x4000, 0x0, 0x2001, -0x2000,
+	0x0, 0x2001, -0x2000, 0x0, 0x2201, -0x2200,
+};
+static const unsigned char rulebases[] = {
+	0, 6, 39, 81, 111, 119, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	124, 0, 0, 127, 0, 0, 0, 0, 0, 0, 0, 0, 131, 142, 146, 151,
+	0, 170, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 180, 196, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 198, 201, 0, 0, 0, 219, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 222,
+	0, 0, 0, 0, 225, 0, 0, 0, 0, 0, 0, 0, 228, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 231, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 234, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 237, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+};
+static const unsigned char exceptions[][2] = {
+	{ 48, 12 }, { 49, 13 }, { 120, 14 }, { 127, 15 },
+	{ 128, 16 }, { 129, 17 }, { 134, 18 }, { 137, 19 },
+	{ 138, 19 }, { 142, 20 }, { 143, 21 }, { 144, 22 },
+	{ 147, 19 }, { 148, 23 }, { 149, 24 }, { 150, 25 },
+	{ 151, 26 }, { 154, 27 }, { 156, 25 }, { 157, 28 },
+	{ 158, 29 }, { 159, 30 }, { 166, 31 }, { 169, 31 },
+	{ 174, 31 }, { 177, 32 }, { 178, 32 }, { 183, 33 },
+	{ 191, 34 }, { 197, 35 }, { 200, 35 }, { 203, 35 },
+	{ 221, 36 }, { 242, 35 }, { 246, 37 }, { 247, 38 },
+	{ 32, 45 }, { 58, 46 }, { 61, 47 }, { 62, 48 },
+	{ 63, 49 }, { 64, 49 }, { 67, 50 }, { 68, 51 },
+	{ 69, 52 }, { 80, 53 }, { 81, 54 }, { 82, 55 },
+	{ 83, 56 }, { 84, 57 }, { 89, 58 }, { 91, 59 },
+	{ 92, 60 }, { 97, 61 }, { 99, 62 }, { 101, 63 },
+	{ 102, 64 }, { 104, 65 }, { 105, 66 }, { 106, 64 },
+	{ 107, 67 }, { 108, 68 }, { 111, 66 }, { 113, 69 },
+	{ 114, 70 }, { 117, 71 }, { 125, 72 }, { 130, 73 },
+	{ 135, 74 }, { 137, 75 }, { 138, 76 }, { 139, 76 },
+	{ 140, 77 }, { 146, 78 }, { 157, 79 }, { 158, 80 },
+	{ 69, 87 }, { 123, 29 }, { 124, 29 }, { 125, 29 },
+	{ 127, 88 }, { 134, 89 }, { 136, 90 }, { 137, 90 },
+	{ 138, 90 }, { 140, 91 }, { 142, 92 }, { 143, 92 },
+	{ 172, 93 }, { 173, 94 }, { 174, 94 }, { 175, 94 },
+	{ 194, 95 }, { 204, 96 }, { 205, 97 }, { 206, 97 },
+	{ 207, 98 }, { 208, 99 }, { 209, 100 }, { 213, 101 },
+	{ 214, 102 }, { 215, 103 }, { 240, 104 }, { 241, 105 },
+	{ 242, 106 }, { 243, 107 }, { 244, 108 }, { 245, 109 },
+	{ 249, 110 }, { 253, 45 }, { 254, 45 }, { 255, 45 },
+	{ 80, 105 }, { 81, 105 }, { 82, 105 }, { 83, 105 },
+	{ 84, 105 }, { 85, 105 }, { 86, 105 }, { 87, 105 },
+	{ 88, 105 }, { 89, 105 }, { 90, 105 }, { 91, 105 },
+	{ 92, 105 }, { 93, 105 }, { 94, 105 }, { 95, 105 },
+	{ 130, 0 }, { 131, 0 }, { 132, 0 }, { 133, 0 },
+	{ 134, 0 }, { 135, 0 }, { 136, 0 }, { 137, 0 },
+	{ 192, 117 }, { 207, 118 }, { 128, 137 }, { 129, 138 },
+	{ 130, 139 }, { 133, 140 }, { 134, 141 }, { 112, 157 },
+	{ 113, 157 }, { 118, 158 }, { 119, 158 }, { 120, 159 },
+	{ 121, 159 }, { 122, 160 }, { 123, 160 }, { 124, 161 },
+	{ 125, 161 }, { 179, 162 }, { 186, 163 }, { 187, 163 },
+	{ 188, 164 }, { 190, 165 }, { 195, 162 }, { 204, 164 },
+	{ 218, 166 }, { 219, 166 }, { 229, 106 }, { 234, 167 },
+	{ 235, 167 }, { 236, 110 }, { 243, 162 }, { 248, 168 },
+	{ 249, 168 }, { 250, 169 }, { 251, 169 }, { 252, 164 },
+	{ 38, 176 }, { 42, 177 }, { 43, 178 }, { 78, 179 },
+	{ 132, 8 }, { 98, 186 }, { 99, 187 }, { 100, 188 },
+	{ 101, 189 }, { 102, 190 }, { 109, 191 }, { 110, 192 },
+	{ 111, 193 }, { 112, 194 }, { 126, 195 }, { 127, 195 },
+	{ 125, 207 }, { 141, 208 }, { 148, 209 }, { 171, 210 },
+	{ 172, 211 }, { 173, 212 }, { 176, 213 }, { 177, 214 },
+	{ 178, 215 }, { 196, 216 }, { 197, 217 }, { 198, 218 },
+};
diff --git a/lib/libc/musl/src/ctype/nonspacing.h b/lib/libc/musl/src/ctype/nonspacing.h
index 48231e73fb..5d05a3d1a0 100644
--- a/lib/libc/musl/src/ctype/nonspacing.h
+++ b/lib/libc/musl/src/ctype/nonspacing.h
@@ -8,16 +8,16 @@
 16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
 16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
 16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,49,16,16,50,
-51,16,52,53,54,16,16,16,16,16,16,55,16,16,16,16,16,56,57,58,59,60,61,62,63,16,
-16,64,16,65,66,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
+51,16,52,53,54,16,16,16,16,16,16,55,16,16,56,16,57,58,59,60,61,62,63,64,65,66,
+67,68,16,69,70,71,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
+16,72,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
+16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
+16,16,16,73,74,16,16,16,75,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
 16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
 16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
-16,16,16,67,68,16,16,16,69,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
-16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
-16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
-16,16,16,16,16,16,16,70,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
-16,16,71,72,16,16,16,16,16,16,16,73,16,16,16,16,16,74,16,16,16,16,16,16,16,75,
-76,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
+16,16,16,16,16,16,16,76,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
+16,16,77,78,16,16,16,16,16,16,16,79,16,16,16,16,16,80,81,82,16,16,16,16,16,83,
+84,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
 16,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,
 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
@@ -25,16 +25,16 @@
 0,0,0,0,0,0,0,248,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 0,0,0,254,255,255,255,255,191,182,0,0,0,0,0,0,0,63,0,255,23,0,0,0,0,0,248,255,
 255,0,0,1,0,0,0,0,0,0,0,0,0,0,0,192,191,159,61,0,0,0,128,2,0,0,0,255,255,255,
-7,0,0,0,0,0,0,0,0,0,0,192,255,1,0,0,0,0,0,0,248,15,0,0,0,192,251,239,62,0,0,0,
-0,0,14,0,0,0,0,0,0,0,0,0,0,0,0,0,0,240,255,255,255,255,
+7,0,0,0,0,0,0,0,0,0,0,192,255,1,0,0,0,0,0,0,248,15,32,0,0,192,251,239,62,0,0,
+0,0,0,14,0,0,0,0,0,0,0,0,0,0,0,0,0,0,248,255,255,255,255,
 255,7,0,0,0,0,0,0,20,254,33,254,0,12,0,0,0,2,0,0,0,0,0,0,16,30,32,0,0,12,0,0,
-0,6,0,0,0,0,0,0,16,134,57,2,0,0,0,35,0,6,0,0,0,0,0,0,16,190,33,0,0,12,0,0,252,
-2,0,0,0,0,0,0,144,30,32,64,0,12,0,0,0,4,0,0,0,0,0,0,0,1,32,0,0,0,0,0,0,1,0,0,
-0,0,0,0,192,193,61,96,0,12,0,0,0,2,0,0,0,0,0,0,144,64,48,0,0,12,0,0,0,3,0,0,0,
-0,0,0,24,30,32,0,0,12,0,0,0,0,0,0,0,0,0,0,0,0,4,92,0,0,0,0,0,0,0,0,0,0,0,242,
-7,128,127,0,0,0,0,0,0,0,0,0,0,0,0,242,27,0,63,0,0,0,0,0,0,0,0,0,3,0,0,160,2,0,
-0,0,0,0,0,254,127,223,224,255,254,255,255,255,31,64,0,0,0,0,0,0,0,0,0,0,0,0,
-224,253,102,0,0,0,195,1,0,30,0,100,32,0,32,0,0,0,0,0,0,0,0,0,0,0,
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+2,0,0,0,0,0,0,254,127,223,224,255,254,255,255,255,31,64,0,0,0,0,0,0,0,0,0,0,0,
+0,224,253,102,0,0,0,195,1,0,30,0,100,32,0,32,0,0,0,0,0,0,0,0,0,0,0,
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@@ -48,9 +48,9 @@
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-16,0,0,0,0,0,0,157,193,2,0,0,0,0,48,64,
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+0,16,0,0,0,0,0,0,157,193,2,0,0,0,0,48,64,
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@@ -58,24 +58,32 @@
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diff --git a/lib/libc/musl/src/ctype/punct.h b/lib/libc/musl/src/ctype/punct.h
index 7a6239405a..67929470c9 100644
--- a/lib/libc/musl/src/ctype/punct.h
+++ b/lib/libc/musl/src/ctype/punct.h
@@ -8,17 +8,17 @@
 16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
 16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,64,16,16,16,16,16,16,16,16,16,
 16,16,16,16,16,16,16,16,16,16,16,16,16,16,65,16,16,66,16,67,68,
-69,16,70,71,72,16,73,16,16,74,75,76,77,78,16,79,16,80,81,82,83,84,85,86,87,88,
-16,89,16,90,91,16,16,16,16,16,16,92,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
+69,16,70,71,72,16,73,16,16,74,75,76,77,78,16,79,80,81,82,83,84,85,86,87,88,89,
+90,91,16,92,93,94,95,16,16,16,16,96,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
+16,97,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
+16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
+16,16,16,98,99,16,16,100,101,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
 16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
 16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
-16,16,16,93,94,16,16,16,95,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
-16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
-16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
-16,16,16,16,16,16,16,96,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
-16,97,98,99,100,16,16,101,102,17,17,103,16,16,16,16,16,16,16,16,16,16,16,16,
-16,104,105,16,16,16,16,106,16,107,108,109,17,17,17,110,111,112,113,16,16,16,
-16,16,
+16,16,16,16,16,16,16,16,102,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
+16,16,16,103,104,105,106,16,16,107,108,17,17,109,16,16,16,16,16,16,110,111,16,
+16,16,16,16,112,113,16,16,114,115,116,16,117,118,119,17,17,17,120,121,122,123,
+124,16,16,16,16,
 16,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,
 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
 255,255,255,255,255,255,255,255,255,255,255,0,0,0,0,254,255,0,252,1,0,0,248,1,
@@ -28,25 +28,25 @@
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,252,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 0,0,0,252,0,0,0,0,0,230,254,255,255,255,0,64,73,0,0,0,0,0,24,0,255,255,0,216,
 0,0,0,0,0,0,0,1,0,60,0,0,0,0,0,0,0,0,0,0,0,0,16,224,1,30,0,
-96,255,191,0,0,0,0,0,0,255,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,248,207,3,
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 0,254,255,255,255,0,252,255,255,0,0,0,0,0,0,0,0,252,0,0,0,0,0,0,192,255,223,
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-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,255,63,0,255,255,255,255,127,254,255,255,255,
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-255,1,0,0,255,255,255,255,255,255,255,255,63,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,255,255,255,255,255,255,255,255,255,255,127,0,255,255,3,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,
-0,8,0,0,0,8,0,0,32,0,0,0,32,0,0,128,0,0,0,128,0,0,0,2,0,0,0,2,0,0,8,0,0,0,0,0,
-0,0,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,15,0,
-248,254,255,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,128,255,127,0,0,0,0,0,0,0,0,
-0,0,0,0,0,112,7,0,192,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,255,255,255,255,255,15,255,
-255,255,255,255,255,255,255,255,255,255,255,15,0,255,127,254,255,254,255,254,
-255,255,255,63,0,255,31,255,255,255,127,0,0,0,252,0,0,0,12,0,0,0,252,255,255,
-255,31,0,0,0,0,0,0,192,255,255,255,7,0,255,255,255,255,255,15,255,1,3,0,63,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,31,0,255,31,
-255,1,255,255,255,255,255,255,255,255,255,255,255,255,255,255,15,0,255,255,
-255,255,255,255,255,255,255,255,31,0,0,0,0,
-0,255,15,255,255,255,255,255,255,255,0,255,3,255,255,255,255,255,0,255,255,
-255,63,0,0,0,0,0,0,0,0,0,0,255,15,255,255,255,255,255,127,255,31,255,255,255,
-15,0,0,255,255,255,0,0,0,0,0,1,0,255,255,127,0,0,0,
diff --git a/lib/libc/musl/src/ctype/towctrans.c b/lib/libc/musl/src/ctype/towctrans.c
index 8f6810184e..76d137696e 100644
--- a/lib/libc/musl/src/ctype/towctrans.c
+++ b/lib/libc/musl/src/ctype/towctrans.c
@@ -1,307 +1,73 @@
-#include <ctype.h>
-#include <stddef.h>
 #include <wctype.h>
 
-#define CASEMAP(u1,u2,l) { (u1), (l)-(u1), (u2)-(u1)+1 }
-#define CASELACE(u1,u2) CASEMAP((u1),(u2),(u1)+1)
+static const unsigned char tab[];
 
-static const struct {
-	unsigned short upper;
-	signed char lower;
-	unsigned char len;
-} casemaps[] = {
-	CASEMAP(0xc0,0xde,0xe0),
+static const unsigned char rulebases[512];
+static const int rules[];
 
-	CASELACE(0x0100,0x012e),
-	CASELACE(0x0132,0x0136),
-	CASELACE(0x0139,0x0147),
-	CASELACE(0x014a,0x0176),
-	CASELACE(0x0179,0x017d),
+static const unsigned char exceptions[][2];
 
-	CASELACE(0x370,0x372),
-	CASEMAP(0x391,0x3a1,0x3b1),
-	CASEMAP(0x3a3,0x3ab,0x3c3),
-	CASEMAP(0x400,0x40f,0x450),
-	CASEMAP(0x410,0x42f,0x430),
+#include "casemap.h"
 
-	CASELACE(0x460,0x480),
-	CASELACE(0x48a,0x4be),
-	CASELACE(0x4c1,0x4cd),
-	CASELACE(0x4d0,0x50e),
-
-	CASELACE(0x514,0x52e),
-	CASEMAP(0x531,0x556,0x561),
-
-	CASELACE(0x01a0,0x01a4),
-	CASELACE(0x01b3,0x01b5),
-	CASELACE(0x01cd,0x01db),
-	CASELACE(0x01de,0x01ee),
-	CASELACE(0x01f8,0x021e),
-	CASELACE(0x0222,0x0232),
-	CASELACE(0x03d8,0x03ee),
-
-	CASELACE(0x1e00,0x1e94),
-	CASELACE(0x1ea0,0x1efe),
-
-	CASEMAP(0x1f08,0x1f0f,0x1f00),
-	CASEMAP(0x1f18,0x1f1d,0x1f10),
-	CASEMAP(0x1f28,0x1f2f,0x1f20),
-	CASEMAP(0x1f38,0x1f3f,0x1f30),
-	CASEMAP(0x1f48,0x1f4d,0x1f40),
-
-	CASEMAP(0x1f68,0x1f6f,0x1f60),
-	CASEMAP(0x1f88,0x1f8f,0x1f80),
-	CASEMAP(0x1f98,0x1f9f,0x1f90),
-	CASEMAP(0x1fa8,0x1faf,0x1fa0),
-	CASEMAP(0x1fb8,0x1fb9,0x1fb0),
-	CASEMAP(0x1fba,0x1fbb,0x1f70),
-	CASEMAP(0x1fc8,0x1fcb,0x1f72),
-	CASEMAP(0x1fd8,0x1fd9,0x1fd0),
-	CASEMAP(0x1fda,0x1fdb,0x1f76),
-	CASEMAP(0x1fe8,0x1fe9,0x1fe0),
-	CASEMAP(0x1fea,0x1feb,0x1f7a),
-	CASEMAP(0x1ff8,0x1ff9,0x1f78),
-	CASEMAP(0x1ffa,0x1ffb,0x1f7c),
-
-	CASEMAP(0x13f0,0x13f5,0x13f8),
-	CASELACE(0xa698,0xa69a),
-	CASELACE(0xa796,0xa79e),
-
-	CASELACE(0x246,0x24e),
-	CASELACE(0x510,0x512),
-	CASEMAP(0x2160,0x216f,0x2170),
-	CASEMAP(0x2c00,0x2c2e,0x2c30),
-	CASELACE(0x2c67,0x2c6b),
-	CASELACE(0x2c80,0x2ce2),
-	CASELACE(0x2ceb,0x2ced),
-
-	CASELACE(0xa640,0xa66c),
-	CASELACE(0xa680,0xa696),
-
-	CASELACE(0xa722,0xa72e),
-	CASELACE(0xa732,0xa76e),
-	CASELACE(0xa779,0xa77b),
-	CASELACE(0xa77e,0xa786),
-
-	CASELACE(0xa790,0xa792),
-	CASELACE(0xa7a0,0xa7a8),
-
-	CASELACE(0xa7b4,0xa7b6),
-
-	CASEMAP(0xff21,0xff3a,0xff41),
-	{ 0,0,0 }
-};
-
-static const unsigned short pairs[][2] = {
-	{ 'I',    0x0131 },
-	{ 'S',    0x017f },
-	{ 0x0130, 'i'    },
-	{ 0x0178, 0x00ff },
-	{ 0x0181, 0x0253 },
-	{ 0x0182, 0x0183 },
-	{ 0x0184, 0x0185 },
-	{ 0x0186, 0x0254 },
-	{ 0x0187, 0x0188 },
-	{ 0x0189, 0x0256 },
-	{ 0x018a, 0x0257 },
-	{ 0x018b, 0x018c },
-	{ 0x018e, 0x01dd },
-	{ 0x018f, 0x0259 },
-	{ 0x0190, 0x025b },
-	{ 0x0191, 0x0192 },
-	{ 0x0193, 0x0260 },
-	{ 0x0194, 0x0263 },
-	{ 0x0196, 0x0269 },
-	{ 0x0197, 0x0268 },
-	{ 0x0198, 0x0199 },
-	{ 0x019c, 0x026f },
-	{ 0x019d, 0x0272 },
-	{ 0x019f, 0x0275 },
-	{ 0x01a6, 0x0280 },
-	{ 0x01a7, 0x01a8 },
-	{ 0x01a9, 0x0283 },
-	{ 0x01ac, 0x01ad },
-	{ 0x01ae, 0x0288 },
-	{ 0x01af, 0x01b0 },
-	{ 0x01b1, 0x028a },
-	{ 0x01b2, 0x028b },
-	{ 0x01b7, 0x0292 },
-	{ 0x01b8, 0x01b9 },
-	{ 0x01bc, 0x01bd },
-	{ 0x01c4, 0x01c6 },
-	{ 0x01c4, 0x01c5 },
-	{ 0x01c5, 0x01c6 },
-	{ 0x01c7, 0x01c9 },
-	{ 0x01c7, 0x01c8 },
-	{ 0x01c8, 0x01c9 },
-	{ 0x01ca, 0x01cc },
-	{ 0x01ca, 0x01cb },
-	{ 0x01cb, 0x01cc },
-	{ 0x01f1, 0x01f3 },
-	{ 0x01f1, 0x01f2 },
-	{ 0x01f2, 0x01f3 },
-	{ 0x01f4, 0x01f5 },
-	{ 0x01f6, 0x0195 },
-	{ 0x01f7, 0x01bf },
-	{ 0x0220, 0x019e },
-	{ 0x0386, 0x03ac },
-	{ 0x0388, 0x03ad },
-	{ 0x0389, 0x03ae },
-	{ 0x038a, 0x03af },
-	{ 0x038c, 0x03cc },
-	{ 0x038e, 0x03cd },
-	{ 0x038f, 0x03ce },
-	{ 0x0399, 0x0345 },
-	{ 0x0399, 0x1fbe },
-	{ 0x03a3, 0x03c2 },
-	{ 0x03f7, 0x03f8 },
-	{ 0x03fa, 0x03fb },
-	{ 0x1e60, 0x1e9b },
-	{ 0x1e9e, 0xdf },
-
-	{ 0x1f59, 0x1f51 },
-	{ 0x1f5b, 0x1f53 },
-	{ 0x1f5d, 0x1f55 },
-	{ 0x1f5f, 0x1f57 },
-	{ 0x1fbc, 0x1fb3 },
-	{ 0x1fcc, 0x1fc3 },
-	{ 0x1fec, 0x1fe5 },
-	{ 0x1ffc, 0x1ff3 },
-
-	{ 0x23a, 0x2c65 },
-	{ 0x23b, 0x23c },
-	{ 0x23d, 0x19a },
-	{ 0x23e, 0x2c66 },
-	{ 0x241, 0x242 },
-	{ 0x243, 0x180 },
-	{ 0x244, 0x289 },
-	{ 0x245, 0x28c },
-	{ 0x3f4, 0x3b8 },
-	{ 0x3f9, 0x3f2 },
-	{ 0x3fd, 0x37b },
-	{ 0x3fe, 0x37c },
-	{ 0x3ff, 0x37d },
-	{ 0x4c0, 0x4cf },
-
-	{ 0x2126, 0x3c9 },
-	{ 0x212a, 'k' },
-	{ 0x212b, 0xe5 },
-	{ 0x2132, 0x214e },
-	{ 0x2183, 0x2184 },
-	{ 0x2c60, 0x2c61 },
-	{ 0x2c62, 0x26b },
-	{ 0x2c63, 0x1d7d },
-	{ 0x2c64, 0x27d },
-	{ 0x2c6d, 0x251 },
-	{ 0x2c6e, 0x271 },
-	{ 0x2c6f, 0x250 },
-	{ 0x2c70, 0x252 },
-	{ 0x2c72, 0x2c73 },
-	{ 0x2c75, 0x2c76 },
-	{ 0x2c7e, 0x23f },
-	{ 0x2c7f, 0x240 },
-	{ 0x2cf2, 0x2cf3 },
-
-	{ 0xa77d, 0x1d79 },
-	{ 0xa78b, 0xa78c },
-	{ 0xa78d, 0x265 },
-	{ 0xa7aa, 0x266 },
-
-	{ 0x10c7, 0x2d27 },
-	{ 0x10cd, 0x2d2d },
-
-	/* bogus greek 'symbol' letters */
-	{ 0x376, 0x377 },
-	{ 0x39c, 0xb5 },
-	{ 0x392, 0x3d0 },
-	{ 0x398, 0x3d1 },
-	{ 0x3a6, 0x3d5 },
-	{ 0x3a0, 0x3d6 },
-	{ 0x39a, 0x3f0 },
-	{ 0x3a1, 0x3f1 },
-	{ 0x395, 0x3f5 },
-	{ 0x3cf, 0x3d7 },
-
-	{ 0xa7ab, 0x25c },
-	{ 0xa7ac, 0x261 },
-	{ 0xa7ad, 0x26c },
-	{ 0xa7ae, 0x26a },
-	{ 0xa7b0, 0x29e },
-	{ 0xa7b1, 0x287 },
-	{ 0xa7b2, 0x29d },
-	{ 0xa7b3, 0xab53 },
-
-	/* special cyrillic lowercase forms */
-	{ 0x412, 0x1c80 },
-	{ 0x414, 0x1c81 },
-	{ 0x41e, 0x1c82 },
-	{ 0x421, 0x1c83 },
-	{ 0x422, 0x1c84 },
-	{ 0x422, 0x1c85 },
-	{ 0x42a, 0x1c86 },
-	{ 0x462, 0x1c87 },
-	{ 0xa64a, 0x1c88 },
-
-	{ 0,0 }
-};
-
-
-static wchar_t __towcase(wchar_t wc, int lower)
+static int casemap(unsigned c, int dir)
 {
-	int i;
-	int lmul = 2*lower-1;
-	int lmask = lower-1;
-	/* no letters with case in these large ranges */
-	if (!iswalpha(wc)
-	 || (unsigned)wc - 0x0600 <= 0x0fff-0x0600
-	 || (unsigned)wc - 0x2e00 <= 0xa63f-0x2e00
-	 || (unsigned)wc - 0xa800 <= 0xab52-0xa800
-	 || (unsigned)wc - 0xabc0 <= 0xfeff-0xabc0)
-		return wc;
-	/* special case because the diff between upper/lower is too big */
-	if (lower && (unsigned)wc - 0x10a0 < 0x2e)
-		if (wc>0x10c5 && wc != 0x10c7 && wc != 0x10cd) return wc;
-		else return wc + 0x2d00 - 0x10a0;
-	if (!lower && (unsigned)wc - 0x2d00 < 0x26)
-		if (wc>0x2d25 && wc != 0x2d27 && wc != 0x2d2d) return wc;
-		else return wc + 0x10a0 - 0x2d00;
-	if (lower && (unsigned)wc - 0x13a0 < 0x50)
-		return wc + 0xab70 - 0x13a0;
-	if (!lower && (unsigned)wc - 0xab70 < 0x50)
-		return wc + 0x13a0 - 0xab70;
-	for (i=0; casemaps[i].len; i++) {
-		int base = casemaps[i].upper + (lmask & casemaps[i].lower);
-		if ((unsigned)wc-base < casemaps[i].len) {
-			if (casemaps[i].lower == 1)
-				return wc + lower - ((wc-casemaps[i].upper)&1);
-			return wc + lmul*casemaps[i].lower;
+	unsigned b, x, y, v, rt, xb, xn;
+	int r, rd, c0 = c;
+
+	if (c >= 0x20000) return c;
+
+	b = c>>8;
+	c &= 255;
+	x = c/3;
+	y = c%3;
+
+	/* lookup entry in two-level base-6 table */
+	v = tab[tab[b]*86+x];
+	static const int mt[] = { 2048, 342, 57 };
+	v = (v*mt[y]>>11)%6;
+
+	/* use the bit vector out of the tables as an index into
+	 * a block-specific set of rules and decode the rule into
+	 * a type and a case-mapping delta. */
+	r = rules[rulebases[b]+v];
+	rt = r & 255;
+	rd = r >> 8;
+
+	/* rules 0/1 are simple lower/upper case with a delta.
+	 * apply according to desired mapping direction. */
+	if (rt < 2) return c0 + (rd & -(rt^dir));
+
+	/* binary search. endpoints of the binary search for
+	 * this block are stored in the rule delta field. */
+	xn = rd & 0xff;
+	xb = (unsigned)rd >> 8;
+	while (xn) {
+		unsigned try = exceptions[xb+xn/2][0];
+		if (try == c) {
+			r = rules[exceptions[xb+xn/2][1]];
+			rt = r & 255;
+			rd = r >> 8;
+			if (rt < 2) return c0 + (rd & -(rt^dir));
+			/* Hard-coded for the four exceptional titlecase */
+			return c0 + (dir ? -1 : 1);
+		} else if (try > c) {
+			xn /= 2;
+		} else {
+			xb += xn/2;
+			xn -= xn/2;
 		}
 	}
-	for (i=0; pairs[i][1-lower]; i++) {
-		if (pairs[i][1-lower] == wc)
-			return pairs[i][lower];
-	}
-	if ((unsigned)wc - (0x10428 - 0x28*lower) < 0x28)
-		return wc - 0x28 + 0x50*lower;
-	if ((unsigned)wc - (0x104d8 - 0x28*lower) < 0x24)
-		return wc - 0x28 + 0x50*lower;
-	if ((unsigned)wc - (0x10cc0 - 0x40*lower) < 0x33)
-		return wc - 0x40 + 0x80*lower;
-	if ((unsigned)wc - (0x118c0 - 0x20*lower) < 0x20)
-		return wc - 0x20 + 0x40*lower;
-	if ((unsigned)wc - (0x1e922 - 0x22*lower) < 0x22)
-		return wc - 0x22 + 0x44*lower;
-	return wc;
-}
-
-wint_t towupper(wint_t wc)
-{
-	return (unsigned)wc < 128 ? toupper(wc) : __towcase(wc, 0);
+	return c0;
 }
 
 wint_t towlower(wint_t wc)
 {
-	return (unsigned)wc < 128 ? tolower(wc) : __towcase(wc, 1);
+	return casemap(wc, 0);
+}
+
+wint_t towupper(wint_t wc)
+{
+	return casemap(wc, 1);
 }
 
 wint_t __towupper_l(wint_t c, locale_t l)
diff --git a/lib/libc/musl/src/ctype/wcwidth.c b/lib/libc/musl/src/ctype/wcwidth.c
index 49c40eea8c..36256a5385 100644
--- a/lib/libc/musl/src/ctype/wcwidth.c
+++ b/lib/libc/musl/src/ctype/wcwidth.c
@@ -23,7 +23,7 @@ int wcwidth(wchar_t wc)
 		return -1;
 	if (wc-0x20000U < 0x20000)
 		return 2;
-	if (wc == 0xe0001 || wc-0xe0020U < 0x5f || wc-0xe0100 < 0xef)
+	if (wc == 0xe0001 || wc-0xe0020U < 0x5f || wc-0xe0100U < 0xef)
 		return 0;
 	return 1;
 }
diff --git a/lib/libc/musl/src/ctype/wide.h b/lib/libc/musl/src/ctype/wide.h
index e4672b23ce..e403c9a5a2 100644
--- a/lib/libc/musl/src/ctype/wide.h
+++ b/lib/libc/musl/src/ctype/wide.h
@@ -17,7 +17,7 @@
 16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,17,38,39,16,16,
 16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
 16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
-16,16,16,16,16,16,16,40,41,42,43,44,45,46,16,16,47,16,16,16,16,16,
+16,16,16,16,16,16,16,40,41,42,43,44,45,46,47,16,48,49,16,16,16,16,
 16,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,
 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
@@ -31,10 +31,10 @@
 255,255,255,15,0,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
 255,255,255,255,255,255,255,255,255,255,255,63,0,0,0,255,15,255,255,255,255,
 255,255,255,127,254,255,255,255,255,255,255,255,255,255,127,254,255,255,255,
-255,255,255,255,255,255,255,255,255,224,255,255,255,255,127,254,255,255,255,
+255,255,255,255,255,255,255,255,255,224,255,255,255,255,255,254,255,255,255,
 255,255,255,255,255,255,255,127,255,255,255,255,255,7,255,255,255,255,15,0,
 255,255,255,255,255,127,255,255,255,255,255,0,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,255,255,255,255,255,127,255,255,255,255,255,
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,0,
 0,0,0,0,0,0,0,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
 255,31,255,255,255,255,255,255,127,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,
@@ -43,13 +43,13 @@
 255,15,0,0,0,0,0,0,0,0,0,0,0,0,0,255,3,0,0,255,255,255,255,247,255,127,15,0,0,
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,254,255,255,255,255,255,255,255,255,255,255,
 255,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,127,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,3,0,0,0,255,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,31,0,
-0,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,255,255,255,7,0,255,255,255,127,0,0,0,0,0,0,0,
-0,0,0,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
+0,0,0,0,0,0,0,0,0,0,0,0,15,0,0,0,255,255,255,255,255,255,255,255,255,255,255,
 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,255,255,255,255,
+255,0,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
+255,255,255,255,255,255,255,255,255,255,255,255,7,0,255,255,255,127,0,0,0,0,0,
+0,7,0,240,0,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,
 15,16,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,128,0,0,0,0,0,0,0,0,0,0,
 0,0,0,0,0,0,0,0,0,0,0,0,0,64,254,7,0,0,0,0,0,0,0,0,0,0,0,0,7,0,255,255,255,
 255,255,15,255,1,3,0,63,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,255,255,
@@ -58,6 +58,8 @@
 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
 159,255,255,255,255,255,255,255,63,0,120,255,255,255,0,0,4,0,0,96,0,16,0,0,0,
 0,0,0,0,0,0,0,248,255,255,255,255,255,255,255,255,255,255,0,0,0,0,0,0,255,255,
-255,255,255,255,255,255,63,16,7,0,0,24,240,1,0,0,255,255,255,255,255,127,255,
-31,255,255,255,15,0,0,255,255,255,0,0,0,0,0,1,0,255,255,127,0,0,
-0,
+255,255,255,255,255,255,63,16,39,0,0,24,240,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,255,15,0,
+0,0,224,255,255,255,255,255,255,255,255,255,255,255,255,123,252,255,255,255,
+255,231,199,255,255,255,231,255,255,255,255,255,255,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,15,7,7,0,63,0,0,0,0,0,0,0,0,0,0,0,0,0,
diff --git a/lib/libc/musl/src/fenv/riscv64/fenv.S b/lib/libc/musl/src/fenv/riscv64/fenv.S
index f149003d2e..0ea78bf9ac 100644
--- a/lib/libc/musl/src/fenv/riscv64/fenv.S
+++ b/lib/libc/musl/src/fenv/riscv64/fenv.S
@@ -45,8 +45,11 @@ fegetenv:
 .global fesetenv
 .type fesetenv, %function
 fesetenv:
+	li t2, -1
+	li t1, 0
+	beq a0, t2, 1f
 	lw t1, 0(a0)
-	fscsr t0, t1
+1:	fscsr t1
 	li a0, 0
 	ret
 
diff --git a/lib/libc/musl/src/internal/dynlink.h b/lib/libc/musl/src/internal/dynlink.h
index ffd06b0471..764e3a1a8f 100644
--- a/lib/libc/musl/src/internal/dynlink.h
+++ b/lib/libc/musl/src/internal/dynlink.h
@@ -96,7 +96,6 @@ struct fdpic_dummy_loadmap {
 #define DYN_CNT 32
 
 typedef void (*stage2_func)(unsigned char *, size_t *);
-typedef void (*stage3_func)(size_t *);
 
 hidden void *__dlsym(void *restrict, const char *restrict, void *restrict);
 
diff --git a/lib/libc/musl/src/internal/floatscan.c b/lib/libc/musl/src/internal/floatscan.c
index 278bf25025..8c0828fcb3 100644
--- a/lib/libc/musl/src/internal/floatscan.c
+++ b/lib/libc/musl/src/internal/floatscan.c
@@ -33,9 +33,6 @@
 
 #define MASK (KMAX-1)
 
-#define CONCAT2(x,y) x ## y
-#define CONCAT(x,y) CONCAT2(x,y)
-
 static long long scanexp(FILE *f, int pok)
 {
 	int c;
@@ -301,7 +298,7 @@ static long double decfloat(FILE *f, int c, int bits, int emin, int sign, int po
 	y -= bias;
 
 	if ((e2+LDBL_MANT_DIG & INT_MAX) > emax-5) {
-		if (fabs(y) >= CONCAT(0x1p, LDBL_MANT_DIG)) {
+		if (fabsl(y) >= 2/LDBL_EPSILON) {
 			if (denormal && bits==LDBL_MANT_DIG+e2-emin)
 				denormal = 0;
 			y *= 0.5;
diff --git a/lib/libc/musl/src/internal/syscall.h b/lib/libc/musl/src/internal/syscall.h
index 9f2784dbaf..975a0031d4 100644
--- a/lib/libc/musl/src/internal/syscall.h
+++ b/lib/libc/musl/src/internal/syscall.h
@@ -193,6 +193,45 @@ hidden long __syscall_ret(unsigned long),
 #define SYS_sendfile SYS_sendfile64
 #endif
 
+#ifndef SYS_timer_settime
+#define SYS_timer_settime SYS_timer_settime32
+#endif
+
+#ifndef SYS_timer_gettime
+#define SYS_timer_gettime SYS_timer_gettime32
+#endif
+
+#ifndef SYS_timerfd_settime
+#define SYS_timerfd_settime SYS_timerfd_settime32
+#endif
+
+#ifndef SYS_timerfd_gettime
+#define SYS_timerfd_gettime SYS_timerfd_gettime32
+#endif
+
+#ifndef SYS_clock_settime
+#define SYS_clock_settime SYS_clock_settime32
+#endif
+
+#ifndef SYS_clock_gettime
+#define SYS_clock_gettime SYS_clock_gettime32
+#endif
+
+#ifndef SYS_clock_getres
+#define SYS_clock_getres SYS_clock_getres_time32
+#endif
+
+#ifndef SYS_clock_nanosleep
+#define SYS_clock_nanosleep SYS_clock_nanosleep_time32
+#endif
+
+#ifndef SYS_gettimeofday
+#define SYS_gettimeofday SYS_gettimeofday_time32
+#endif
+
+#ifndef SYS_settimeofday
+#define SYS_settimeofday SYS_settimeofday_time32
+#endif
 
 /* Ensure that the plain syscall names are defined even for "time64-only"
  * archs. These facilitate callers passing null time arguments, and make
@@ -306,6 +345,13 @@ hidden long __syscall_ret(unsigned long),
 #define SO_SNDTIMEO_OLD  21
 #endif
 
+#define SO_TIMESTAMP_OLD    29
+#define SO_TIMESTAMPNS_OLD  35
+#define SO_TIMESTAMPING_OLD 37
+#define SCM_TIMESTAMP_OLD    SO_TIMESTAMP_OLD
+#define SCM_TIMESTAMPNS_OLD  SO_TIMESTAMPNS_OLD
+#define SCM_TIMESTAMPING_OLD SO_TIMESTAMPING_OLD
+
 #ifndef SIOCGSTAMP_OLD
 #define SIOCGSTAMP_OLD 0x8906
 #endif
diff --git a/lib/libc/musl/src/internal/version.h b/lib/libc/musl/src/internal/version.h
index 56294c973c..fc7215c7b3 100644
--- a/lib/libc/musl/src/internal/version.h
+++ b/lib/libc/musl/src/internal/version.h
@@ -1 +1 @@
-#define VERSION "1.1.24"
+#define VERSION "1.2.0"
diff --git a/lib/libc/musl/src/ldso/__dlsym.c b/lib/libc/musl/src/ldso/__dlsym.c
index 8ac0a33491..0384f97e96 100644
--- a/lib/libc/musl/src/ldso/__dlsym.c
+++ b/lib/libc/musl/src/ldso/__dlsym.c
@@ -8,3 +8,7 @@ static void *stub_dlsym(void *restrict p, const char *restrict s, void *restrict
 }
 
 weak_alias(stub_dlsym, __dlsym);
+
+#if _REDIR_TIME64
+weak_alias(stub_dlsym, __dlsym_redir_time64);
+#endif
diff --git a/lib/libc/musl/src/ldso/arm/dlsym_time64.S b/lib/libc/musl/src/ldso/arm/dlsym_time64.S
new file mode 100644
index 0000000000..bb2e70408f
--- /dev/null
+++ b/lib/libc/musl/src/ldso/arm/dlsym_time64.S
@@ -0,0 +1,3 @@
+#define __dlsym __dlsym_redir_time64
+#define dlsym __dlsym_time64
+#include "dlsym.s"
diff --git a/lib/libc/musl/src/ldso/i386/dlsym_time64.S b/lib/libc/musl/src/ldso/i386/dlsym_time64.S
new file mode 100644
index 0000000000..bb2e70408f
--- /dev/null
+++ b/lib/libc/musl/src/ldso/i386/dlsym_time64.S
@@ -0,0 +1,3 @@
+#define __dlsym __dlsym_redir_time64
+#define dlsym __dlsym_time64
+#include "dlsym.s"
diff --git a/lib/libc/musl/src/ldso/m68k/dlsym_time64.S b/lib/libc/musl/src/ldso/m68k/dlsym_time64.S
new file mode 100644
index 0000000000..bb2e70408f
--- /dev/null
+++ b/lib/libc/musl/src/ldso/m68k/dlsym_time64.S
@@ -0,0 +1,3 @@
+#define __dlsym __dlsym_redir_time64
+#define dlsym __dlsym_time64
+#include "dlsym.s"
diff --git a/lib/libc/musl/src/ldso/microblaze/dlsym_time64.S b/lib/libc/musl/src/ldso/microblaze/dlsym_time64.S
new file mode 100644
index 0000000000..bb2e70408f
--- /dev/null
+++ b/lib/libc/musl/src/ldso/microblaze/dlsym_time64.S
@@ -0,0 +1,3 @@
+#define __dlsym __dlsym_redir_time64
+#define dlsym __dlsym_time64
+#include "dlsym.s"
diff --git a/lib/libc/musl/src/ldso/mips/dlsym_time64.S b/lib/libc/musl/src/ldso/mips/dlsym_time64.S
new file mode 100644
index 0000000000..bb2e70408f
--- /dev/null
+++ b/lib/libc/musl/src/ldso/mips/dlsym_time64.S
@@ -0,0 +1,3 @@
+#define __dlsym __dlsym_redir_time64
+#define dlsym __dlsym_time64
+#include "dlsym.s"
diff --git a/lib/libc/musl/src/ldso/mipsn32/dlsym_time64.S b/lib/libc/musl/src/ldso/mipsn32/dlsym_time64.S
new file mode 100644
index 0000000000..bb2e70408f
--- /dev/null
+++ b/lib/libc/musl/src/ldso/mipsn32/dlsym_time64.S
@@ -0,0 +1,3 @@
+#define __dlsym __dlsym_redir_time64
+#define dlsym __dlsym_time64
+#include "dlsym.s"
diff --git a/lib/libc/musl/src/ldso/or1k/dlsym_time64.S b/lib/libc/musl/src/ldso/or1k/dlsym_time64.S
new file mode 100644
index 0000000000..bb2e70408f
--- /dev/null
+++ b/lib/libc/musl/src/ldso/or1k/dlsym_time64.S
@@ -0,0 +1,3 @@
+#define __dlsym __dlsym_redir_time64
+#define dlsym __dlsym_time64
+#include "dlsym.s"
diff --git a/lib/libc/musl/src/ldso/powerpc/dlsym_time64.S b/lib/libc/musl/src/ldso/powerpc/dlsym_time64.S
new file mode 100644
index 0000000000..bb2e70408f
--- /dev/null
+++ b/lib/libc/musl/src/ldso/powerpc/dlsym_time64.S
@@ -0,0 +1,3 @@
+#define __dlsym __dlsym_redir_time64
+#define dlsym __dlsym_time64
+#include "dlsym.s"
diff --git a/lib/libc/musl/src/ldso/sh/dlsym_time64.S b/lib/libc/musl/src/ldso/sh/dlsym_time64.S
new file mode 100644
index 0000000000..bb2e70408f
--- /dev/null
+++ b/lib/libc/musl/src/ldso/sh/dlsym_time64.S
@@ -0,0 +1,3 @@
+#define __dlsym __dlsym_redir_time64
+#define dlsym __dlsym_time64
+#include "dlsym.s"
diff --git a/lib/libc/musl/src/linux/clock_adjtime.c b/lib/libc/musl/src/linux/clock_adjtime.c
index 2f531397c3..23eb8729db 100644
--- a/lib/libc/musl/src/linux/clock_adjtime.c
+++ b/lib/libc/musl/src/linux/clock_adjtime.c
@@ -94,21 +94,56 @@ int clock_adjtime (clockid_t clock_id, struct timex *utx)
 		return __syscall_ret(-ENOTSUP);
 #endif
 	if (sizeof(time_t) > sizeof(long)) {
-		union {
-			struct timex utx;
-			struct ktimex ktx;
-		} u = { *utx };
-		u.ktx.time_sec = utx->time.tv_sec;
-		u.ktx.time_usec = utx->time.tv_usec;
+		struct ktimex ktx = {
+			.modes = utx->modes,
+			.offset = utx->offset,
+			.freq = utx->freq,
+			.maxerror = utx->maxerror,
+			.esterror = utx->esterror,
+			.status = utx->status,
+			.constant = utx->constant,
+			.precision = utx->precision,
+			.tolerance = utx->tolerance,
+			.time_sec = utx->time.tv_sec,
+			.time_usec = utx->time.tv_usec,
+			.tick = utx->tick,
+			.ppsfreq = utx->ppsfreq,
+			.jitter = utx->jitter,
+			.shift = utx->shift,
+			.stabil = utx->stabil,
+			.jitcnt = utx->jitcnt,
+			.calcnt = utx->calcnt,
+			.errcnt = utx->errcnt,
+			.stbcnt = utx->stbcnt,
+			.tai = utx->tai,
+		};
 #ifdef SYS_adjtimex
-		if (clock_id==CLOCK_REALTIME) r = __syscall(SYS_adjtimex, &u);
+		if (clock_id==CLOCK_REALTIME) r = __syscall(SYS_adjtimex, &ktx);
 		else
 #endif
-		r = __syscall(SYS_clock_adjtime, clock_id, &u);
+		r = __syscall(SYS_clock_adjtime, clock_id, &ktx);
 		if (r>=0) {
-			*utx = u.utx;
-			utx->time.tv_sec = u.ktx.time_sec;
-			utx->time.tv_usec = u.ktx.time_usec;
+			utx->modes = ktx.modes;
+			utx->offset = ktx.offset;
+			utx->freq = ktx.freq;
+			utx->maxerror = ktx.maxerror;
+			utx->esterror = ktx.esterror;
+			utx->status = ktx.status;
+			utx->constant = ktx.constant;
+			utx->precision = ktx.precision;
+			utx->tolerance = ktx.tolerance;
+			utx->time.tv_sec = ktx.time_sec;
+			utx->time.tv_usec = ktx.time_usec;
+			utx->tick = ktx.tick;
+			utx->ppsfreq = ktx.ppsfreq;
+			utx->jitter = ktx.jitter;
+			utx->shift = ktx.shift;
+			utx->stabil = ktx.stabil;
+			utx->jitcnt = ktx.jitcnt;
+			utx->calcnt = ktx.calcnt;
+			utx->errcnt = ktx.errcnt;
+			utx->stbcnt = ktx.stbcnt;
+			utx->tai = ktx.tai;
 		}
 		return __syscall_ret(r);
 	}
diff --git a/lib/libc/musl/src/linux/wait4.c b/lib/libc/musl/src/linux/wait4.c
index 97f12cc524..83650e34a8 100644
--- a/lib/libc/musl/src/linux/wait4.c
+++ b/lib/libc/musl/src/linux/wait4.c
@@ -1,9 +1,39 @@
 #define _GNU_SOURCE
 #include <sys/wait.h>
 #include <sys/resource.h>
+#include <string.h>
+#include <errno.h>
 #include "syscall.h"
 
-pid_t wait4(pid_t pid, int *status, int options, struct rusage *usage)
+pid_t wait4(pid_t pid, int *status, int options, struct rusage *ru)
 {
-	return syscall(SYS_wait4, pid, status, options, usage);
+	int r;
+#ifdef SYS_wait4_time64
+	if (ru) {
+		long long kru64[18];
+		r = __syscall(SYS_wait4_time64, pid, status, options, kru64);
+		if (!r) {
+			ru->ru_utime = (struct timeval)
+				{ .tv_sec = kru64[0], .tv_usec = kru64[1] };
+			ru->ru_stime = (struct timeval)
+				{ .tv_sec = kru64[2], .tv_usec = kru64[3] };
+			char *slots = (char *)&ru->ru_maxrss;
+			for (int i=0; i<14; i++)
+				*(long *)(slots + i*sizeof(long)) = kru64[4+i];
+		}
+		if (SYS_wait4_time64 == SYS_wait4 || r != -ENOSYS)
+			return __syscall_ret(r);
+	}
+#endif
+	char *dest = ru ? (char *)&ru->ru_maxrss - 4*sizeof(long) : 0;
+	r = __syscall(SYS_wait4, pid, status, options, dest);
+	if (r>0 && ru && sizeof(time_t) > sizeof(long)) {
+		long kru[4];
+		memcpy(kru, dest, 4*sizeof(long));
+		ru->ru_utime = (struct timeval)
+			{ .tv_sec = kru[0], .tv_usec = kru[1] };
+		ru->ru_stime = (struct timeval)
+			{ .tv_sec = kru[2], .tv_usec = kru[3] };
+	}
+	return __syscall_ret(r);
 }
diff --git a/lib/libc/musl/src/math/i386/acos.s b/lib/libc/musl/src/math/i386/acos.s
index 47f365efb1..af423a2fcd 100644
--- a/lib/libc/musl/src/math/i386/acos.s
+++ b/lib/libc/musl/src/math/i386/acos.s
@@ -1,22 +1,10 @@
 # use acos(x) = atan2(fabs(sqrt((1-x)*(1+x))), x)
 
-.global acosf
-.type acosf,@function
-acosf:
-	flds 4(%esp)
-	jmp 1f
-
-.global acosl
-.type acosl,@function
-acosl:
-	fldt 4(%esp)
-	jmp 1f
-
 .global acos
 .type acos,@function
 acos:
 	fldl 4(%esp)
-1:	fld %st(0)
+	fld %st(0)
 	fld1
 	fsub %st(0),%st(1)
 	fadd %st(2)
@@ -25,4 +13,6 @@ acos:
 	fabs         # fix sign of zero (matters in downward rounding mode)
 	fxch %st(1)
 	fpatan
+	fstpl 4(%esp)
+	fldl 4(%esp)
 	ret
diff --git a/lib/libc/musl/src/math/i386/acosf.s b/lib/libc/musl/src/math/i386/acosf.s
index 6c95509f78..d2cdfdbfef 100644
--- a/lib/libc/musl/src/math/i386/acosf.s
+++ b/lib/libc/musl/src/math/i386/acosf.s
@@ -1 +1,16 @@
-# see acos.s
+.global acosf
+.type acosf,@function
+acosf:
+	flds 4(%esp)
+	fld %st(0)
+	fld1
+	fsub %st(0),%st(1)
+	fadd %st(2)
+	fmulp
+	fsqrt
+	fabs         # fix sign of zero (matters in downward rounding mode)
+	fxch %st(1)
+	fpatan
+	fstps 4(%esp)
+	flds 4(%esp)
+	ret
diff --git a/lib/libc/musl/src/math/i386/acosl.s b/lib/libc/musl/src/math/i386/acosl.s
index 6c95509f78..599c8230cd 100644
--- a/lib/libc/musl/src/math/i386/acosl.s
+++ b/lib/libc/musl/src/math/i386/acosl.s
@@ -1 +1,14 @@
-# see acos.s
+.global acosl
+.type acosl,@function
+acosl:
+	fldt 4(%esp)
+	fld %st(0)
+	fld1
+	fsub %st(0),%st(1)
+	fadd %st(2)
+	fmulp
+	fsqrt
+	fabs         # fix sign of zero (matters in downward rounding mode)
+	fxch %st(1)
+	fpatan
+	ret
diff --git a/lib/libc/musl/src/math/i386/asin.s b/lib/libc/musl/src/math/i386/asin.s
index 920d967acf..2bc8356f49 100644
--- a/lib/libc/musl/src/math/i386/asin.s
+++ b/lib/libc/musl/src/math/i386/asin.s
@@ -1,23 +1,3 @@
-.global asinf
-.type asinf,@function
-asinf:
-	flds 4(%esp)
-	mov 4(%esp),%eax
-	add %eax,%eax
-	cmp $0x01000000,%eax
-	jae 1f
-		# subnormal x, return x with underflow
-	fld %st(0)
-	fmul %st(1)
-	fstps 4(%esp)
-	ret
-
-.global asinl
-.type asinl,@function
-asinl:
-	fldt 4(%esp)
-	jmp 1f
-
 .global asin
 .type asin,@function
 asin:
@@ -25,15 +5,17 @@ asin:
 	mov 8(%esp),%eax
 	add %eax,%eax
 	cmp $0x00200000,%eax
-	jae 1f
-		# subnormal x, return x with underflow
-	fsts 4(%esp)
-	ret
-1:	fld %st(0)
+	jb 1f
+	fld %st(0)
 	fld1
 	fsub %st(0),%st(1)
 	fadd %st(2)
 	fmulp
 	fsqrt
 	fpatan
+	fstpl 4(%esp)
+	fldl 4(%esp)
+	ret
+		# subnormal x, return x with underflow
+1:	fsts 4(%esp)
 	ret
diff --git a/lib/libc/musl/src/math/i386/asinf.s b/lib/libc/musl/src/math/i386/asinf.s
index e07bf5999c..059097532e 100644
--- a/lib/libc/musl/src/math/i386/asinf.s
+++ b/lib/libc/musl/src/math/i386/asinf.s
@@ -1 +1,23 @@
-# see asin.s
+.global asinf
+.type asinf,@function
+asinf:
+	flds 4(%esp)
+	mov 4(%esp),%eax
+	add %eax,%eax
+	cmp $0x01000000,%eax
+	jb 1f
+	fld %st(0)
+	fld1
+	fsub %st(0),%st(1)
+	fadd %st(2)
+	fmulp
+	fsqrt
+	fpatan
+	fstps 4(%esp)
+	flds 4(%esp)
+	ret
+		# subnormal x, return x with underflow
+1:	fld %st(0)
+	fmul %st(1)
+	fstps 4(%esp)
+	ret
diff --git a/lib/libc/musl/src/math/i386/asinl.s b/lib/libc/musl/src/math/i386/asinl.s
index e07bf5999c..e973fc85fb 100644
--- a/lib/libc/musl/src/math/i386/asinl.s
+++ b/lib/libc/musl/src/math/i386/asinl.s
@@ -1 +1,12 @@
-# see asin.s
+.global asinl
+.type asinl,@function
+asinl:
+	fldt 4(%esp)
+	fld %st(0)
+	fld1
+	fsub %st(0),%st(1)
+	fadd %st(2)
+	fmulp
+	fsqrt
+	fpatan
+	ret
diff --git a/lib/libc/musl/src/math/i386/atan.s b/lib/libc/musl/src/math/i386/atan.s
index a26feae1ff..2c57f6b309 100644
--- a/lib/libc/musl/src/math/i386/atan.s
+++ b/lib/libc/musl/src/math/i386/atan.s
@@ -8,6 +8,8 @@ atan:
 	jb 1f
 	fld1
 	fpatan
+	fstpl 4(%esp)
+	fldl 4(%esp)
 	ret
 		# subnormal x, return x with underflow
 1:	fsts 4(%esp)
diff --git a/lib/libc/musl/src/math/i386/atan2.s b/lib/libc/musl/src/math/i386/atan2.s
index 76b95f3176..8bc441b1e4 100644
--- a/lib/libc/musl/src/math/i386/atan2.s
+++ b/lib/libc/musl/src/math/i386/atan2.s
@@ -4,7 +4,8 @@ atan2:
 	fldl 4(%esp)
 	fldl 12(%esp)
 	fpatan
-	fstl 4(%esp)
+	fstpl 4(%esp)
+	fldl 4(%esp)
 	mov 8(%esp),%eax
 	add %eax,%eax
 	cmp $0x00200000,%eax
diff --git a/lib/libc/musl/src/math/i386/atan2f.s b/lib/libc/musl/src/math/i386/atan2f.s
index c9408a9088..3908c86df9 100644
--- a/lib/libc/musl/src/math/i386/atan2f.s
+++ b/lib/libc/musl/src/math/i386/atan2f.s
@@ -4,7 +4,8 @@ atan2f:
 	flds 4(%esp)
 	flds 8(%esp)
 	fpatan
-	fsts 4(%esp)
+	fstps 4(%esp)
+	flds 4(%esp)
 	mov 4(%esp),%eax
 	add %eax,%eax
 	cmp $0x01000000,%eax
diff --git a/lib/libc/musl/src/math/i386/atanf.s b/lib/libc/musl/src/math/i386/atanf.s
index 893beac506..c2cbe2e026 100644
--- a/lib/libc/musl/src/math/i386/atanf.s
+++ b/lib/libc/musl/src/math/i386/atanf.s
@@ -8,6 +8,8 @@ atanf:
 	jb 1f
 	fld1
 	fpatan
+	fstps 4(%esp)
+	flds 4(%esp)
 	ret
 		# subnormal x, return x with underflow
 1:	fld %st(0)
diff --git a/lib/libc/musl/src/math/i386/exp2.s b/lib/libc/musl/src/math/i386/exp2.s
deleted file mode 100644
index f335a3e527..0000000000
--- a/lib/libc/musl/src/math/i386/exp2.s
+++ /dev/null
@@ -1 +0,0 @@
-# see exp.s
diff --git a/lib/libc/musl/src/math/i386/exp2f.s b/lib/libc/musl/src/math/i386/exp2f.s
deleted file mode 100644
index f335a3e527..0000000000
--- a/lib/libc/musl/src/math/i386/exp2f.s
+++ /dev/null
@@ -1 +0,0 @@
-# see exp.s
diff --git a/lib/libc/musl/src/math/i386/exp2l.s b/lib/libc/musl/src/math/i386/exp2l.s
index f335a3e527..8125761d10 100644
--- a/lib/libc/musl/src/math/i386/exp2l.s
+++ b/lib/libc/musl/src/math/i386/exp2l.s
@@ -1 +1 @@
-# see exp.s
+# see exp_ld.s
diff --git a/lib/libc/musl/src/math/i386/exp.s b/lib/libc/musl/src/math/i386/exp_ld.s
similarity index 67%
rename from lib/libc/musl/src/math/i386/exp.s
rename to lib/libc/musl/src/math/i386/exp_ld.s
index df87c49728..99cba01fa1 100644
--- a/lib/libc/musl/src/math/i386/exp.s
+++ b/lib/libc/musl/src/math/i386/exp_ld.s
@@ -1,35 +1,8 @@
-.global expm1f
-.type expm1f,@function
-expm1f:
-	flds 4(%esp)
-	mov 4(%esp),%eax
-	add %eax,%eax
-	cmp $0x01000000,%eax
-	jae 1f
-		# subnormal x, return x with underflow
-	fld %st(0)
-	fmul %st(1)
-	fstps 4(%esp)
-	ret
-
 .global expm1l
 .type expm1l,@function
 expm1l:
 	fldt 4(%esp)
-	jmp 1f
-
-.global expm1
-.type expm1,@function
-expm1:
-	fldl 4(%esp)
-	mov 8(%esp),%eax
-	add %eax,%eax
-	cmp $0x00200000,%eax
-	jae 1f
-		# subnormal x, return x with underflow
-	fsts 4(%esp)
-	ret
-1:	fldl2e
+	fldl2e
 	fmulp
 	mov $0xc2820000,%eax
 	push %eax
@@ -59,12 +32,6 @@ expm1:
 	fsubrp
 	ret
 
-.global exp2f
-.type exp2f,@function
-exp2f:
-	flds 4(%esp)
-	jmp 1f
-
 .global exp2l
 .global __exp2l
 .hidden __exp2l
@@ -72,26 +39,6 @@ exp2f:
 exp2l:
 __exp2l:
 	fldt 4(%esp)
-	jmp 1f
-
-.global expf
-.type expf,@function
-expf:
-	flds 4(%esp)
-	jmp 2f
-
-.global exp
-.type exp,@function
-exp:
-	fldl 4(%esp)
-2:	fldl2e
-	fmulp
-	jmp 1f
-
-.global exp2
-.type exp2,@function
-exp2:
-	fldl 4(%esp)
 1:	sub $12,%esp
 	fld %st(0)
 	fstpt (%esp)
diff --git a/lib/libc/musl/src/math/i386/expf.s b/lib/libc/musl/src/math/i386/expf.s
deleted file mode 100644
index f335a3e527..0000000000
--- a/lib/libc/musl/src/math/i386/expf.s
+++ /dev/null
@@ -1 +0,0 @@
-# see exp.s
diff --git a/lib/libc/musl/src/math/i386/expm1.s b/lib/libc/musl/src/math/i386/expm1.s
deleted file mode 100644
index f335a3e527..0000000000
--- a/lib/libc/musl/src/math/i386/expm1.s
+++ /dev/null
@@ -1 +0,0 @@
-# see exp.s
diff --git a/lib/libc/musl/src/math/i386/expm1f.s b/lib/libc/musl/src/math/i386/expm1f.s
deleted file mode 100644
index f335a3e527..0000000000
--- a/lib/libc/musl/src/math/i386/expm1f.s
+++ /dev/null
@@ -1 +0,0 @@
-# see exp.s
diff --git a/lib/libc/musl/src/math/i386/expm1l.s b/lib/libc/musl/src/math/i386/expm1l.s
index f335a3e527..8125761d10 100644
--- a/lib/libc/musl/src/math/i386/expm1l.s
+++ b/lib/libc/musl/src/math/i386/expm1l.s
@@ -1 +1 @@
-# see exp.s
+# see exp_ld.s
diff --git a/lib/libc/musl/src/math/i386/log.s b/lib/libc/musl/src/math/i386/log.s
index fcccf0309c..08c59924b4 100644
--- a/lib/libc/musl/src/math/i386/log.s
+++ b/lib/libc/musl/src/math/i386/log.s
@@ -4,4 +4,6 @@ log:
 	fldln2
 	fldl 4(%esp)
 	fyl2x
+	fstpl 4(%esp)
+	fldl 4(%esp)
 	ret
diff --git a/lib/libc/musl/src/math/i386/log10.s b/lib/libc/musl/src/math/i386/log10.s
index 28eb5b2f91..120e91ece8 100644
--- a/lib/libc/musl/src/math/i386/log10.s
+++ b/lib/libc/musl/src/math/i386/log10.s
@@ -4,4 +4,6 @@ log10:
 	fldlg2
 	fldl 4(%esp)
 	fyl2x
+	fstpl 4(%esp)
+	fldl 4(%esp)
 	ret
diff --git a/lib/libc/musl/src/math/i386/log10f.s b/lib/libc/musl/src/math/i386/log10f.s
index c0c0c67ef1..b055493ad4 100644
--- a/lib/libc/musl/src/math/i386/log10f.s
+++ b/lib/libc/musl/src/math/i386/log10f.s
@@ -4,4 +4,6 @@ log10f:
 	fldlg2
 	flds 4(%esp)
 	fyl2x
+	fstps 4(%esp)
+	flds 4(%esp)
 	ret
diff --git a/lib/libc/musl/src/math/i386/log1p.s b/lib/libc/musl/src/math/i386/log1p.s
index 354f391a7e..f3c95f83ad 100644
--- a/lib/libc/musl/src/math/i386/log1p.s
+++ b/lib/libc/musl/src/math/i386/log1p.s
@@ -10,10 +10,14 @@ log1p:
 	cmp $0x00100000,%eax
 	jb 2f
 	fyl2xp1
+	fstpl 4(%esp)
+	fldl 4(%esp)
 	ret
 1:	fld1
 	faddp
 	fyl2x
+	fstpl 4(%esp)
+	fldl 4(%esp)
 	ret
 		# subnormal x, return x with underflow
 2:	fsts 4(%esp)
diff --git a/lib/libc/musl/src/math/i386/log1pf.s b/lib/libc/musl/src/math/i386/log1pf.s
index 4d3484cd37..9f13d95ffb 100644
--- a/lib/libc/musl/src/math/i386/log1pf.s
+++ b/lib/libc/musl/src/math/i386/log1pf.s
@@ -10,10 +10,14 @@ log1pf:
 	cmp $0x00800000,%eax
 	jb 2f
 	fyl2xp1
+	fstps 4(%esp)
+	flds 4(%esp)
 	ret
 1:	fld1
 	faddp
 	fyl2x
+	fstps 4(%esp)
+	flds 4(%esp)
 	ret
 		# subnormal x, return x with underflow
 2:	fxch
diff --git a/lib/libc/musl/src/math/i386/log2.s b/lib/libc/musl/src/math/i386/log2.s
index 1508803774..7eff0b616c 100644
--- a/lib/libc/musl/src/math/i386/log2.s
+++ b/lib/libc/musl/src/math/i386/log2.s
@@ -4,4 +4,6 @@ log2:
 	fld1
 	fldl 4(%esp)
 	fyl2x
+	fstpl 4(%esp)
+	fldl 4(%esp)
 	ret
diff --git a/lib/libc/musl/src/math/i386/log2f.s b/lib/libc/musl/src/math/i386/log2f.s
index 00cdce75a0..b32fa2f76a 100644
--- a/lib/libc/musl/src/math/i386/log2f.s
+++ b/lib/libc/musl/src/math/i386/log2f.s
@@ -4,4 +4,6 @@ log2f:
 	fld1
 	flds 4(%esp)
 	fyl2x
+	fstps 4(%esp)
+	flds 4(%esp)
 	ret
diff --git a/lib/libc/musl/src/math/i386/logf.s b/lib/libc/musl/src/math/i386/logf.s
index da7ff3ae11..4d0346a445 100644
--- a/lib/libc/musl/src/math/i386/logf.s
+++ b/lib/libc/musl/src/math/i386/logf.s
@@ -4,4 +4,6 @@ logf:
 	fldln2
 	flds 4(%esp)
 	fyl2x
+	fstps 4(%esp)
+	flds 4(%esp)
 	ret
diff --git a/lib/libc/musl/src/math/mips/fabs.c b/lib/libc/musl/src/math/mips/fabs.c
new file mode 100644
index 0000000000..0a5aa3b1d4
--- /dev/null
+++ b/lib/libc/musl/src/math/mips/fabs.c
@@ -0,0 +1,16 @@
+#if !defined(__mips_soft_float) && defined(__mips_abs2008)
+
+#include <math.h>
+
+double fabs(double x)
+{
+	double r;
+	__asm__("abs.d %0,%1" : "=f"(r) : "f"(x));
+	return r;
+}
+
+#else
+
+#include "../fabs.c"
+
+#endif
diff --git a/lib/libc/musl/src/math/mips/fabsf.c b/lib/libc/musl/src/math/mips/fabsf.c
new file mode 100644
index 0000000000..35307be6ab
--- /dev/null
+++ b/lib/libc/musl/src/math/mips/fabsf.c
@@ -0,0 +1,16 @@
+#if !defined(__mips_soft_float) && defined(__mips_abs2008)
+
+#include <math.h>
+
+float fabsf(float x)
+{
+	float r;
+	__asm__("abs.s %0,%1" : "=f"(r) : "f"(x));
+	return r;
+}
+
+#else
+
+#include "../fabsf.c"
+
+#endif
diff --git a/lib/libc/musl/src/math/mips/sqrt.c b/lib/libc/musl/src/math/mips/sqrt.c
new file mode 100644
index 0000000000..595c9dbc36
--- /dev/null
+++ b/lib/libc/musl/src/math/mips/sqrt.c
@@ -0,0 +1,16 @@
+#if !defined(__mips_soft_float) && __mips >= 3
+
+#include <math.h>
+
+double sqrt(double x)
+{
+	double r;
+	__asm__("sqrt.d %0,%1" : "=f"(r) : "f"(x));
+	return r;
+}
+
+#else
+
+#include "../sqrt.c"
+
+#endif
diff --git a/lib/libc/musl/src/math/mips/sqrtf.c b/lib/libc/musl/src/math/mips/sqrtf.c
new file mode 100644
index 0000000000..84090d2d31
--- /dev/null
+++ b/lib/libc/musl/src/math/mips/sqrtf.c
@@ -0,0 +1,16 @@
+#if !defined(__mips_soft_float) && __mips >= 2
+
+#include <math.h>
+
+float sqrtf(float x)
+{
+	float r;
+	__asm__("sqrt.s %0,%1" : "=f"(r) : "f"(x));
+	return r;
+}
+
+#else
+
+#include "../sqrtf.c"
+
+#endif
diff --git a/lib/libc/musl/src/math/powerpc/fabs.c b/lib/libc/musl/src/math/powerpc/fabs.c
index f6ec4433c2..0efc21ef83 100644
--- a/lib/libc/musl/src/math/powerpc/fabs.c
+++ b/lib/libc/musl/src/math/powerpc/fabs.c
@@ -1,6 +1,6 @@
 #include <math.h>
 
-#ifdef _SOFT_FLOAT
+#if defined(_SOFT_FLOAT) || defined(BROKEN_PPC_D_ASM)
 
 #include "../fabs.c"
 
diff --git a/lib/libc/musl/src/math/powerpc/fma.c b/lib/libc/musl/src/math/powerpc/fma.c
index fd268f5fde..135c990357 100644
--- a/lib/libc/musl/src/math/powerpc/fma.c
+++ b/lib/libc/musl/src/math/powerpc/fma.c
@@ -1,6 +1,6 @@
 #include <math.h>
 
-#ifdef _SOFT_FLOAT
+#if defined(_SOFT_FLOAT) || defined(BROKEN_PPC_D_ASM)
 
 #include "../fma.c"
 
diff --git a/lib/libc/musl/src/math/x32/lrintl.s b/lib/libc/musl/src/math/x32/lrintl.s
index ee97d1cfec..d4355c327c 100644
--- a/lib/libc/musl/src/math/x32/lrintl.s
+++ b/lib/libc/musl/src/math/x32/lrintl.s
@@ -2,6 +2,6 @@
 .type lrintl,@function
 lrintl:
 	fldt 8(%esp)
-	fistpll 8(%esp)
-	mov 8(%esp),%rax
+	fistpl 8(%esp)
+	movl 8(%esp),%eax
 	ret
diff --git a/lib/libc/musl/src/misc/getrusage.c b/lib/libc/musl/src/misc/getrusage.c
index 0aaf0ac72e..8e03e2e3db 100644
--- a/lib/libc/musl/src/misc/getrusage.c
+++ b/lib/libc/musl/src/misc/getrusage.c
@@ -1,7 +1,35 @@
 #include <sys/resource.h>
+#include <string.h>
+#include <errno.h>
 #include "syscall.h"
 
 int getrusage(int who, struct rusage *ru)
 {
-	return syscall(SYS_getrusage, who, ru);
+	int r;
+#ifdef SYS_getrusage_time64
+	long long kru64[18];
+	r = __syscall(SYS_getrusage_time64, who, kru64);
+	if (!r) {
+		ru->ru_utime = (struct timeval)
+			{ .tv_sec = kru64[0], .tv_usec = kru64[1] };
+		ru->ru_stime = (struct timeval)
+			{ .tv_sec = kru64[2], .tv_usec = kru64[3] };
+		char *slots = (char *)&ru->ru_maxrss;
+		for (int i=0; i<14; i++)
+			*(long *)(slots + i*sizeof(long)) = kru64[4+i];
+	}
+	if (SYS_getrusage_time64 == SYS_getrusage || r != -ENOSYS)
+		return __syscall_ret(r);
+#endif
+	char *dest = (char *)&ru->ru_maxrss - 4*sizeof(long);
+	r = __syscall(SYS_getrusage, who, dest);
+	if (!r && sizeof(time_t) > sizeof(long)) {
+		long kru[4];
+		memcpy(kru, dest, 4*sizeof(long));
+		ru->ru_utime = (struct timeval)
+			{ .tv_sec = kru[0], .tv_usec = kru[1] };
+		ru->ru_stime = (struct timeval)
+			{ .tv_sec = kru[2], .tv_usec = kru[3] };
+	}
+	return __syscall_ret(r);
 }
diff --git a/lib/libc/musl/src/misc/ioctl.c b/lib/libc/musl/src/misc/ioctl.c
index 6f31d4bc91..8947751147 100644
--- a/lib/libc/musl/src/misc/ioctl.c
+++ b/lib/libc/musl/src/misc/ioctl.c
@@ -3,8 +3,115 @@
 #include <errno.h>
 #include <time.h>
 #include <sys/time.h>
+#include <stddef.h>
+#include <string.h>
 #include "syscall.h"
 
+#define alignof(t) offsetof(struct { char c; t x; }, x)
+
+#define W 1
+#define R 2
+#define WR 3
+
+struct ioctl_compat_map {
+	int new_req, old_req;
+	unsigned char old_size, dir, force_align, noffs;
+	unsigned char offsets[8];
+};
+
+#define NINTH(a,b,c,d,e,f,g,h,i,...) i
+#define COUNT(...) NINTH(__VA_ARGS__,8,7,6,5,4,3,2,1,0)
+#define OFFS(...) COUNT(__VA_ARGS__), { __VA_ARGS__ }
+
+/* yields a type for a struct with original size n, with a misaligned
+ * timeval/timespec expanded from 32- to 64-bit. for use with ioctl
+ * number producing macros; only size of result is meaningful. */
+#define new_misaligned(n) struct { int i; time_t t; char c[(n)-4]; }
+
+static const struct ioctl_compat_map compat_map[] = {
+	{ SIOCGSTAMP, SIOCGSTAMP_OLD, 8, R, 0, OFFS(0, 4) },
+	{ SIOCGSTAMPNS, SIOCGSTAMPNS_OLD, 8, R, 0, OFFS(0, 4) },
+
+	/* SNDRV_TIMER_IOCTL_STATUS */
+	{ _IOR('T', 0x14, char[96]), _IOR('T', 0x14, 88), 88, R, 0, OFFS(0,4) },
+
+	/* SNDRV_PCM_IOCTL_STATUS[_EXT] */
+	{ _IOR('A', 0x20, char[128]), _IOR('A', 0x20, char[108]), 108, R, 1, OFFS(4,8,12,16,52,56,60,64) },
+	{ _IOWR('A', 0x24, char[128]), _IOWR('A', 0x24, char[108]), 108, WR, 1, OFFS(4,8,12,16,52,56,60,64) },
+
+	/* SNDRV_RAWMIDI_IOCTL_STATUS */
+	{ _IOWR('W', 0x20, char[48]), _IOWR('W', 0x20, char[36]), 36, WR, 1, OFFS(4,8) },
+
+	/* SNDRV_PCM_IOCTL_SYNC_PTR - with 3 subtables */
+	{ _IOWR('A', 0x23, char[136]), _IOWR('A', 0x23, char[132]), 0, WR, 1, 0 },
+	{ 0, 0, 4, WR, 1, 0 }, /* snd_pcm_sync_ptr (flags only) */
+	{ 0, 0, 32, WR, 1, OFFS(8,12,16,24,28) }, /* snd_pcm_mmap_status */
+	{ 0, 0, 8, WR, 1, OFFS(0,4) }, /* snd_pcm_mmap_control */
+
+	/* VIDIOC_QUERYBUF, VIDIOC_QBUF, VIDIOC_DQBUF, VIDIOC_PREPARE_BUF */
+	{ _IOWR('V',  9, new_misaligned(72)), _IOWR('V',  9, char[72]), 72, WR, 0, OFFS(20) },
+	{ _IOWR('V', 15, new_misaligned(72)), _IOWR('V', 15, char[72]), 72, WR, 0, OFFS(20) },
+	{ _IOWR('V', 17, new_misaligned(72)), _IOWR('V', 17, char[72]), 72, WR, 0, OFFS(20) },
+	{ _IOWR('V', 93, new_misaligned(72)), _IOWR('V', 93, char[72]), 72, WR, 0, OFFS(20) },
+
+	/* VIDIOC_DQEVENT */
+	{ _IOR('V', 89, new_misaligned(96)), _IOR('V', 89, char[96]), 96, R, 0, OFFS(76,80) },
+
+	/* VIDIOC_OMAP3ISP_STAT_REQ */
+	{ _IOWR('V', 192+6, char[32]), _IOWR('V', 192+6, char[24]), 22, WR, 0, OFFS(0,4) },
+
+	/* PPPIOCGIDLE */
+	{ _IOR('t', 63, char[16]), _IOR('t', 63, char[8]), 8, R, 0, OFFS(0,4) },
+
+	/* PPGETTIME, PPSETTIME */
+	{ _IOR('p', 0x95, char[16]), _IOR('p', 0x95, char[8]), 8, R, 0, OFFS(0,4) },
+	{ _IOW('p', 0x96, char[16]), _IOW('p', 0x96, char[8]), 8, W, 0, OFFS(0,4) },
+
+	/* LPSETTIMEOUT */
+	{ _IOW(0x6, 0xf, char[16]), 0x060f, 8, W, 0, OFFS(0,4) },
+};
+
+static void convert_ioctl_struct(const struct ioctl_compat_map *map, char *old, char *new, int dir)
+{
+	int new_offset = 0;
+	int old_offset = 0;
+	int old_size = map->old_size;
+	if (!(dir & map->dir)) return;
+	if (!map->old_size) {
+		/* offsets hard-coded for SNDRV_PCM_IOCTL_SYNC_PTR;
+		 * if another exception appears this needs changing. */
+		convert_ioctl_struct(map+1, old, new, dir);
+		convert_ioctl_struct(map+2, old+4, new+8, dir);
+		convert_ioctl_struct(map+3, old+68, new+72, dir);
+		return;
+	}
+	for (int i=0; i < map->noffs; i++) {
+		int ts_offset = map->offsets[i];
+		int len = ts_offset-old_offset;
+		if (dir==W) memcpy(old+old_offset, new+new_offset, len);
+		else memcpy(new+new_offset, old+old_offset, len);
+		new_offset += len;
+		old_offset += len;
+		long long new_ts;
+		long old_ts;
+		int align = map->force_align ? sizeof(time_t) : alignof(time_t);
+		new_offset += (align-1) & -new_offset;
+		if (dir==W) {
+			memcpy(&new_ts, new+new_offset, sizeof new_ts);
+			old_ts = new_ts;
+			memcpy(old+old_offset, &old_ts, sizeof old_ts);
+		} else {
+			memcpy(&old_ts, old+old_offset, sizeof old_ts);
+			new_ts = old_ts;
+			memcpy(new+new_offset, &new_ts, sizeof new_ts);
+		}
+		new_offset += sizeof new_ts;
+		old_offset += sizeof old_ts;
+	}
+	if (dir==W) memcpy(old+old_offset, new+new_offset, old_size-old_offset);
+	else memcpy(new+new_offset, old+old_offset, old_size-old_offset);
+}
+
 int ioctl(int fd, int req, ...)
 {
 	void *arg;
@@ -13,23 +120,18 @@ int ioctl(int fd, int req, ...)
 	arg = va_arg(ap, void *);
 	va_end(ap);
 	int r = __syscall(SYS_ioctl, fd, req, arg);
-	if (r==-ENOTTY) switch (req) {
-	case SIOCGSTAMP:
-	case SIOCGSTAMPNS:
-		if (SIOCGSTAMP==SIOCGSTAMP_OLD) break;
-		if (req==SIOCGSTAMP) req=SIOCGSTAMP_OLD;
-		if (req==SIOCGSTAMPNS) req=SIOCGSTAMPNS_OLD;
-		long t32[2];
-		r = __syscall(SYS_ioctl, fd, req, t32);
-		if (r<0) break;
-		if (req==SIOCGSTAMP_OLD) {
-			struct timeval *tv = arg;
-			tv->tv_sec = t32[0];
-			tv->tv_usec = t32[1];
-		} else {
-			struct timespec *ts = arg;
-			ts->tv_sec = t32[0];
-			ts->tv_nsec = t32[1];
+	if (SIOCGSTAMP != SIOCGSTAMP_OLD && req && r==-ENOTTY) {
+		for (int i=0; i<sizeof compat_map/sizeof *compat_map; i++) {
+			if (compat_map[i].new_req != req) continue;
+			union {
+				long long align;
+				char buf[256];
+			} u;
+			convert_ioctl_struct(&compat_map[i], u.buf, arg, W);
+			r = __syscall(SYS_ioctl, fd, compat_map[i].old_req, u.buf);
+			if (r<0) break;
+			convert_ioctl_struct(&compat_map[i], u.buf, arg, R);
+			break;
 		}
 	}
 	return __syscall_ret(r);
diff --git a/lib/libc/musl/src/misc/pty.c b/lib/libc/musl/src/misc/pty.c
index b9cb5eaad5..a0577147a4 100644
--- a/lib/libc/musl/src/misc/pty.c
+++ b/lib/libc/musl/src/misc/pty.c
@@ -7,7 +7,9 @@
 
 int posix_openpt(int flags)
 {
-	return open("/dev/ptmx", flags);
+	int r = open("/dev/ptmx", flags);
+	if (r < 0 && errno == ENOSPC) errno = EAGAIN;
+	return r;
 }
 
 int grantpt(int fd)
diff --git a/lib/libc/musl/src/network/getsockopt.c b/lib/libc/musl/src/network/getsockopt.c
index e871d624b7..d3640d9c91 100644
--- a/lib/libc/musl/src/network/getsockopt.c
+++ b/lib/libc/musl/src/network/getsockopt.c
@@ -26,6 +26,15 @@ int getsockopt(int fd, int level, int optname, void *restrict optval, socklen_t
 			tv->tv_sec = tv32[0];
 			tv->tv_usec = tv32[1];
 			*optlen = sizeof *tv;
+			break;
+		case SO_TIMESTAMP:
+		case SO_TIMESTAMPNS:
+			if (SO_TIMESTAMP == SO_TIMESTAMP_OLD) break;
+			if (optname==SO_TIMESTAMP) optname=SO_TIMESTAMP_OLD;
+			if (optname==SO_TIMESTAMPNS) optname=SO_TIMESTAMPNS_OLD;
+			r = __socketcall(getsockopt, fd, level,
+				optname, optval, optlen, 0);
+			break;
 		}
 	}
 	return __syscall_ret(r);
diff --git a/lib/libc/musl/src/network/recvmmsg.c b/lib/libc/musl/src/network/recvmmsg.c
index d5dc6b51cb..2978e2f64f 100644
--- a/lib/libc/musl/src/network/recvmmsg.c
+++ b/lib/libc/musl/src/network/recvmmsg.c
@@ -8,6 +8,8 @@
 #define IS32BIT(x) !((x)+0x80000000ULL>>32)
 #define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63))
 
+hidden void __convert_scm_timestamps(struct msghdr *, socklen_t);
+
 int recvmmsg(int fd, struct mmsghdr *msgvec, unsigned int vlen, unsigned int flags, struct timespec *timeout)
 {
 #if LONG_MAX > INT_MAX
@@ -19,14 +21,18 @@ int recvmmsg(int fd, struct mmsghdr *msgvec, unsigned int vlen, unsigned int fla
 #ifdef SYS_recvmmsg_time64
 	time_t s = timeout ? timeout->tv_sec : 0;
 	long ns = timeout ? timeout->tv_nsec : 0;
-	int r = -ENOSYS;
-	if (SYS_recvmmsg == SYS_recvmmsg_time64 || !IS32BIT(s))
-		r = __syscall_cp(SYS_recvmmsg_time64, fd, msgvec, vlen, flags,
+	int r = __syscall_cp(SYS_recvmmsg_time64, fd, msgvec, vlen, flags,
 			timeout ? ((long long[]){s, ns}) : 0);
 	if (SYS_recvmmsg == SYS_recvmmsg_time64 || r!=-ENOSYS)
 		return __syscall_ret(r);
-	return syscall_cp(SYS_recvmmsg, fd, msgvec, vlen, flags,
+	if (vlen > IOV_MAX) vlen = IOV_MAX;
+	socklen_t csize[vlen];
+	for (int i=0; i<vlen; i++) csize[i] = msgvec[i].msg_hdr.msg_controllen;
+	r = __syscall_cp(SYS_recvmmsg, fd, msgvec, vlen, flags,
 		timeout ? ((long[]){CLAMP(s), ns}) : 0);
+	for (int i=0; i<r; i++)
+		__convert_scm_timestamps(&msgvec[i].msg_hdr, csize[i]);
+	return __syscall_ret(r);
 #else
 	return syscall_cp(SYS_recvmmsg, fd, msgvec, vlen, flags, timeout);
 #endif
diff --git a/lib/libc/musl/src/network/recvmsg.c b/lib/libc/musl/src/network/recvmsg.c
index 4ca7da8b72..03641625e8 100644
--- a/lib/libc/musl/src/network/recvmsg.c
+++ b/lib/libc/musl/src/network/recvmsg.c
@@ -1,10 +1,56 @@
 #include <sys/socket.h>
 #include <limits.h>
+#include <time.h>
+#include <sys/time.h>
+#include <string.h>
 #include "syscall.h"
 
+hidden void __convert_scm_timestamps(struct msghdr *, socklen_t);
+
+void __convert_scm_timestamps(struct msghdr *msg, socklen_t csize)
+{
+	if (SCM_TIMESTAMP == SCM_TIMESTAMP_OLD) return;
+	if (!msg->msg_control || !msg->msg_controllen) return;
+
+	struct cmsghdr *cmsg, *last=0;
+	long tmp;
+	long long tvts[2];
+	int type = 0;
+
+	for (cmsg=CMSG_FIRSTHDR(msg); cmsg; cmsg=CMSG_NXTHDR(msg, cmsg)) {
+		if (cmsg->cmsg_level==SOL_SOCKET) switch (cmsg->cmsg_type) {
+		case SCM_TIMESTAMP_OLD:
+			if (type) break;
+			type = SCM_TIMESTAMP;
+			goto common;
+		case SCM_TIMESTAMPNS_OLD:
+			type = SCM_TIMESTAMPNS;
+		common:
+			memcpy(&tmp, CMSG_DATA(cmsg), sizeof tmp);
+			tvts[0] = tmp;
+			memcpy(&tmp, CMSG_DATA(cmsg) + sizeof tmp, sizeof tmp);
+			tvts[1] = tmp;
+			break;
+		}
+		last = cmsg;
+	}
+	if (!last || !type) return;
+	if (CMSG_SPACE(sizeof tvts) > csize-msg->msg_controllen) {
+		msg->msg_flags |= MSG_CTRUNC;
+		return;
+	}
+	msg->msg_controllen += CMSG_SPACE(sizeof tvts);
+	cmsg = CMSG_NXTHDR(msg, last);
+	cmsg->cmsg_level = SOL_SOCKET;
+	cmsg->cmsg_type = type;
+	cmsg->cmsg_len = CMSG_LEN(sizeof tvts);
+	memcpy(CMSG_DATA(cmsg), &tvts, sizeof tvts);
+}
+
 ssize_t recvmsg(int fd, struct msghdr *msg, int flags)
 {
 	ssize_t r;
+	socklen_t orig_controllen = msg->msg_controllen;
 #if LONG_MAX > INT_MAX
 	struct msghdr h, *orig = msg;
 	if (msg) {
@@ -14,6 +60,7 @@ ssize_t recvmsg(int fd, struct msghdr *msg, int flags)
 	}
 #endif
 	r = socketcall_cp(recvmsg, fd, msg, flags, 0, 0, 0);
+	if (r >= 0) __convert_scm_timestamps(msg, orig_controllen);
 #if LONG_MAX > INT_MAX
 	if (orig) *orig = h;
 #endif
diff --git a/lib/libc/musl/src/network/setsockopt.c b/lib/libc/musl/src/network/setsockopt.c
index 2c188a96e3..612a1947a1 100644
--- a/lib/libc/musl/src/network/setsockopt.c
+++ b/lib/libc/musl/src/network/setsockopt.c
@@ -31,6 +31,15 @@ int setsockopt(int fd, int level, int optname, const void *optval, socklen_t opt
 
 			r = __socketcall(setsockopt, fd, level, optname,
 				((long[]){s, CLAMP(us)}), 2*sizeof(long), 0);
+			break;
+		case SO_TIMESTAMP:
+		case SO_TIMESTAMPNS:
+			if (SO_TIMESTAMP == SO_TIMESTAMP_OLD) break;
+			if (optname==SO_TIMESTAMP) optname=SO_TIMESTAMP_OLD;
+			if (optname==SO_TIMESTAMPNS) optname=SO_TIMESTAMPNS_OLD;
+			r = __socketcall(setsockopt, fd, level,
+				optname, optval, optlen, 0);
+			break;
 		}
 	}
 	return __syscall_ret(r);
diff --git a/lib/libc/musl/src/signal/arm/sigsetjmp.s b/lib/libc/musl/src/signal/arm/sigsetjmp.s
index 318addba0a..69ebbf4993 100644
--- a/lib/libc/musl/src/signal/arm/sigsetjmp.s
+++ b/lib/libc/musl/src/signal/arm/sigsetjmp.s
@@ -6,9 +6,10 @@
 sigsetjmp:
 __sigsetjmp:
 	tst r1,r1
-	beq setjmp
+	bne 1f
+	b setjmp
 
-	str lr,[r0,#256]
+1:	str lr,[r0,#256]
 	str r4,[r0,#260+8]
 	mov r4,r0
 
diff --git a/lib/libc/musl/src/stat/__xstat.c b/lib/libc/musl/src/stat/__xstat.c
index f6303430da..630936a0fa 100644
--- a/lib/libc/musl/src/stat/__xstat.c
+++ b/lib/libc/musl/src/stat/__xstat.c
@@ -1,5 +1,7 @@
 #include <sys/stat.h>
 
+#if !_REDIR_TIME64
+
 int __fxstat(int ver, int fd, struct stat *buf)
 {
 	return fstat(fd, buf);
@@ -25,6 +27,8 @@ weak_alias(__fxstatat, __fxstatat64);
 weak_alias(__lxstat, __lxstat64);
 weak_alias(__xstat, __xstat64);
 
+#endif
+
 int __xmknod(int ver, const char *path, mode_t mode, dev_t *dev)
 {
 	return mknod(path, mode, *dev);
diff --git a/lib/libc/musl/src/stat/fchmodat.c b/lib/libc/musl/src/stat/fchmodat.c
index be61bdf3b2..4ee00b0a3e 100644
--- a/lib/libc/musl/src/stat/fchmodat.c
+++ b/lib/libc/musl/src/stat/fchmodat.c
@@ -2,6 +2,7 @@
 #include <fcntl.h>
 #include <errno.h>
 #include "syscall.h"
+#include "kstat.h"
 
 int fchmodat(int fd, const char *path, mode_t mode, int flag)
 {
@@ -10,7 +11,7 @@ int fchmodat(int fd, const char *path, mode_t mode, int flag)
 	if (flag != AT_SYMLINK_NOFOLLOW)
 		return __syscall_ret(-EINVAL);
 
-	struct stat st;
+	struct kstat st;
 	int ret, fd2;
 	char proc[15+3*sizeof(int)];
 
diff --git a/lib/libc/musl/src/stat/fstat.c b/lib/libc/musl/src/stat/fstat.c
index 07f9a5de15..9bbb46decb 100644
--- a/lib/libc/musl/src/stat/fstat.c
+++ b/lib/libc/musl/src/stat/fstat.c
@@ -10,4 +10,6 @@ int fstat(int fd, struct stat *st)
 	return fstatat(fd, "", st, AT_EMPTY_PATH);
 }
 
+#if !_REDIR_TIME64
 weak_alias(fstat, fstat64);
+#endif
diff --git a/lib/libc/musl/src/stat/fstatat.c b/lib/libc/musl/src/stat/fstatat.c
index d915fa1060..de165b5c97 100644
--- a/lib/libc/musl/src/stat/fstatat.c
+++ b/lib/libc/musl/src/stat/fstatat.c
@@ -57,6 +57,14 @@ static int fstatat_statx(int fd, const char *restrict path, struct stat *restric
 		.st_mtim.tv_nsec = stx.stx_mtime.tv_nsec,
 		.st_ctim.tv_sec = stx.stx_ctime.tv_sec,
 		.st_ctim.tv_nsec = stx.stx_ctime.tv_nsec,
+#if _REDIR_TIME64
+		.__st_atim32.tv_sec = stx.stx_atime.tv_sec,
+		.__st_atim32.tv_nsec = stx.stx_atime.tv_nsec,
+		.__st_mtim32.tv_sec = stx.stx_mtime.tv_sec,
+		.__st_mtim32.tv_nsec = stx.stx_mtime.tv_nsec,
+		.__st_ctim32.tv_sec = stx.stx_ctime.tv_sec,
+		.__st_ctim32.tv_nsec = stx.stx_ctime.tv_nsec,
+#endif
 	};
 	return 0;
 }
@@ -110,6 +118,14 @@ static int fstatat_kstat(int fd, const char *restrict path, struct stat *restric
 		.st_mtim.tv_nsec = kst.st_mtime_nsec,
 		.st_ctim.tv_sec = kst.st_ctime_sec,
 		.st_ctim.tv_nsec = kst.st_ctime_nsec,
+#if _REDIR_TIME64
+		.__st_atim32.tv_sec = kst.st_atime_sec,
+		.__st_atim32.tv_nsec = kst.st_atime_nsec,
+		.__st_mtim32.tv_sec = kst.st_mtime_sec,
+		.__st_mtim32.tv_nsec = kst.st_mtime_nsec,
+		.__st_ctim32.tv_sec = kst.st_ctime_sec,
+		.__st_ctim32.tv_nsec = kst.st_ctime_nsec,
+#endif
 	};
 
 	return 0;
@@ -126,4 +142,6 @@ int fstatat(int fd, const char *restrict path, struct stat *restrict st, int fla
 	return __syscall_ret(ret);
 }
 
+#if !_REDIR_TIME64
 weak_alias(fstatat, fstatat64);
+#endif
diff --git a/lib/libc/musl/src/stat/lstat.c b/lib/libc/musl/src/stat/lstat.c
index 9f95218a4e..6fe004dec2 100644
--- a/lib/libc/musl/src/stat/lstat.c
+++ b/lib/libc/musl/src/stat/lstat.c
@@ -6,4 +6,6 @@ int lstat(const char *restrict path, struct stat *restrict buf)
 	return fstatat(AT_FDCWD, path, buf, AT_SYMLINK_NOFOLLOW);
 }
 
+#if !_REDIR_TIME64
 weak_alias(lstat, lstat64);
+#endif
diff --git a/lib/libc/musl/src/stat/stat.c b/lib/libc/musl/src/stat/stat.c
index 528870d2fc..ea70efc4a0 100644
--- a/lib/libc/musl/src/stat/stat.c
+++ b/lib/libc/musl/src/stat/stat.c
@@ -6,4 +6,6 @@ int stat(const char *restrict path, struct stat *restrict buf)
 	return fstatat(AT_FDCWD, path, buf, 0);
 }
 
+#if !_REDIR_TIME64
 weak_alias(stat, stat64);
+#endif
diff --git a/lib/libc/musl/src/stdio/tempnam.c b/lib/libc/musl/src/stdio/tempnam.c
index 84f9197801..565df6b656 100644
--- a/lib/libc/musl/src/stdio/tempnam.c
+++ b/lib/libc/musl/src/stdio/tempnam.c
@@ -6,6 +6,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include "syscall.h"
+#include "kstat.h"
 
 #define MAXTRIES 100
 
@@ -37,10 +38,10 @@ char *tempnam(const char *dir, const char *pfx)
 	for (try=0; try<MAXTRIES; try++) {
 		__randname(s+l-6);
 #ifdef SYS_lstat
-		r = __syscall(SYS_lstat, s, &(struct stat){0});
+		r = __syscall(SYS_lstat, s, &(struct kstat){0});
 #else
 		r = __syscall(SYS_fstatat, AT_FDCWD, s,
-			&(struct stat){0}, AT_SYMLINK_NOFOLLOW);
+			&(struct kstat){0}, AT_SYMLINK_NOFOLLOW);
 #endif
 		if (r == -ENOENT) return strdup(s);
 	}
diff --git a/lib/libc/musl/src/stdio/tmpnam.c b/lib/libc/musl/src/stdio/tmpnam.c
index 6c7c253a6d..d667a83686 100644
--- a/lib/libc/musl/src/stdio/tmpnam.c
+++ b/lib/libc/musl/src/stdio/tmpnam.c
@@ -5,6 +5,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include "syscall.h"
+#include "kstat.h"
 
 #define MAXTRIES 100
 
@@ -17,10 +18,10 @@ char *tmpnam(char *buf)
 	for (try=0; try<MAXTRIES; try++) {
 		__randname(s+12);
 #ifdef SYS_lstat
-		r = __syscall(SYS_lstat, s, &(struct stat){0});
+		r = __syscall(SYS_lstat, s, &(struct kstat){0});
 #else
 		r = __syscall(SYS_fstatat, AT_FDCWD, s,
-			&(struct stat){0}, AT_SYMLINK_NOFOLLOW);
+			&(struct kstat){0}, AT_SYMLINK_NOFOLLOW);
 #endif
 		if (r == -ENOENT) return strcpy(buf ? buf : internal, s);
 	}
diff --git a/lib/libc/musl/src/stdio/ungetc.c b/lib/libc/musl/src/stdio/ungetc.c
index 180673a476..bc629d4ca5 100644
--- a/lib/libc/musl/src/stdio/ungetc.c
+++ b/lib/libc/musl/src/stdio/ungetc.c
@@ -16,5 +16,5 @@ int ungetc(int c, FILE *f)
 	f->flags &= ~F_EOF;
 
 	FUNLOCK(f);
-	return c;
+	return (unsigned char)c;
 }
diff --git a/lib/libc/musl/src/string/arm/memcpy.c b/lib/libc/musl/src/string/arm/memcpy.c
index f703c9bdf7..041614f4ba 100644
--- a/lib/libc/musl/src/string/arm/memcpy.c
+++ b/lib/libc/musl/src/string/arm/memcpy.c
@@ -1,3 +1,3 @@
-#if __ARMEB__ || __thumb__
+#if __ARMEB__
 #include "../memcpy.c"
 #endif
diff --git a/lib/libc/musl/src/string/arm/memcpy_le.S b/lib/libc/musl/src/string/arm/memcpy_le.S
index 9cfbcb2ab7..7b35d305ec 100644
--- a/lib/libc/musl/src/string/arm/memcpy_le.S
+++ b/lib/libc/musl/src/string/arm/memcpy_le.S
@@ -1,4 +1,4 @@
-#if !__ARMEB__ && !__thumb__
+#if !__ARMEB__
 
 /*
  * Copyright (C) 2008 The Android Open Source Project
@@ -40,8 +40,9 @@
  * This file has been modified from the original for use in musl libc.
  * The main changes are: addition of .type memcpy,%function to make the
  * code safely callable from thumb mode, adjusting the return
- * instructions to be compatible with pre-thumb ARM cpus, and removal
- * of prefetch code that is not compatible with older cpus.
+ * instructions to be compatible with pre-thumb ARM cpus, removal of
+ * prefetch code that is not compatible with older cpus and support for
+ * building as thumb 2.
  */
 
 .syntax unified
@@ -241,7 +242,8 @@ non_congruent:
 	beq     2f
 	ldr     r5, [r1], #4
 	sub     r2, r2, #4
-	orr     r4, r3, r5,             lsl lr
+	mov     r4, r5,                 lsl lr
+	orr     r4, r4, r3
 	mov     r3, r5,                 lsr r12
 	str     r4, [r0], #4
 	cmp     r2, #4
@@ -348,7 +350,8 @@ less_than_thirtytwo:
 
 1:      ldr     r5, [r1], #4
 	sub     r2, r2, #4
-	orr     r4, r3, r5,             lsl lr
+	mov     r4, r5,                 lsl lr
+	orr     r4, r4, r3
 	mov     r3,     r5,                     lsr r12
 	str     r4, [r0], #4
 	cmp     r2, #4
diff --git a/lib/libc/musl/src/time/__map_file.c b/lib/libc/musl/src/time/__map_file.c
index 9d376222fd..d3cefa8284 100644
--- a/lib/libc/musl/src/time/__map_file.c
+++ b/lib/libc/musl/src/time/__map_file.c
@@ -2,10 +2,11 @@
 #include <fcntl.h>
 #include <sys/stat.h>
 #include "syscall.h"
+#include "kstat.h"
 
 const char unsigned *__map_file(const char *pathname, size_t *size)
 {
-	struct stat st;
+	struct kstat st;
 	const unsigned char *map = MAP_FAILED;
 	int fd = sys_open(pathname, O_RDONLY|O_CLOEXEC|O_NONBLOCK);
 	if (fd < 0) return 0;
diff --git a/lib/std/atomic/int.zig b/lib/std/atomic/int.zig
index 94985b914f..446059e7ef 100644
--- a/lib/std/atomic/int.zig
+++ b/lib/std/atomic/int.zig
@@ -1,6 +1,3 @@
-const builtin = @import("builtin");
-const AtomicOrder = builtin.AtomicOrder;
-
 /// Thread-safe, lock-free integer
 pub fn Int(comptime T: type) type {
     return struct {
@@ -14,16 +11,16 @@ pub fn Int(comptime T: type) type {
 
         /// Returns previous value
         pub fn incr(self: *Self) T {
-            return @atomicRmw(T, &self.unprotected_value, builtin.AtomicRmwOp.Add, 1, AtomicOrder.SeqCst);
+            return @atomicRmw(T, &self.unprotected_value, .Add, 1, .SeqCst);
         }
 
         /// Returns previous value
         pub fn decr(self: *Self) T {
-            return @atomicRmw(T, &self.unprotected_value, builtin.AtomicRmwOp.Sub, 1, AtomicOrder.SeqCst);
+            return @atomicRmw(T, &self.unprotected_value, .Sub, 1, .SeqCst);
         }
 
         pub fn get(self: *Self) T {
-            return @atomicLoad(T, &self.unprotected_value, AtomicOrder.SeqCst);
+            return @atomicLoad(T, &self.unprotected_value, .SeqCst);
         }
 
         pub fn set(self: *Self, new_value: T) void {
@@ -31,11 +28,11 @@ pub fn Int(comptime T: type) type {
         }
 
         pub fn xchg(self: *Self, new_value: T) T {
-            return @atomicRmw(T, &self.unprotected_value, builtin.AtomicRmwOp.Xchg, new_value, AtomicOrder.SeqCst);
+            return @atomicRmw(T, &self.unprotected_value, .Xchg, new_value, .SeqCst);
         }
 
         pub fn fetchAdd(self: *Self, op: T) T {
-            return @atomicRmw(T, &self.unprotected_value, builtin.AtomicRmwOp.Add, op, AtomicOrder.SeqCst);
+            return @atomicRmw(T, &self.unprotected_value, .Add, op, .SeqCst);
         }
     };
 }
diff --git a/lib/std/atomic/queue.zig b/lib/std/atomic/queue.zig
index 1969587f30..52e200e7a2 100644
--- a/lib/std/atomic/queue.zig
+++ b/lib/std/atomic/queue.zig
@@ -1,7 +1,5 @@
 const std = @import("../std.zig");
 const builtin = @import("builtin");
-const AtomicOrder = builtin.AtomicOrder;
-const AtomicRmwOp = builtin.AtomicRmwOp;
 const assert = std.debug.assert;
 const expect = std.testing.expect;
 
@@ -104,21 +102,17 @@ pub fn Queue(comptime T: type) type {
         }
 
         pub fn dump(self: *Self) void {
-            var stderr_file = std.io.getStdErr() catch return;
-            const stderr = &stderr_file.outStream().stream;
-            const Error = @typeInfo(@TypeOf(stderr)).Pointer.child.Error;
-
-            self.dumpToStream(Error, stderr) catch return;
+            self.dumpToStream(std.io.getStdErr().outStream()) catch return;
         }
 
-        pub fn dumpToStream(self: *Self, comptime Error: type, stream: *std.io.OutStream(Error)) Error!void {
+        pub fn dumpToStream(self: *Self, stream: var) !void {
             const S = struct {
                 fn dumpRecursive(
-                    s: *std.io.OutStream(Error),
+                    s: var,
                     optional_node: ?*Node,
                     indent: usize,
                     comptime depth: comptime_int,
-                ) Error!void {
+                ) !void {
                     try s.writeByteNTimes(' ', indent);
                     if (optional_node) |node| {
                         try s.print("0x{x}={}\n", .{ @ptrToInt(node), node.data });
@@ -149,7 +143,7 @@ const Context = struct {
     put_sum: isize,
     get_sum: isize,
     get_count: usize,
-    puts_done: u8, // TODO make this a bool
+    puts_done: bool,
 };
 
 // TODO add lazy evaluated build options and then put puts_per_thread behind
@@ -173,7 +167,7 @@ test "std.atomic.Queue" {
         .queue = &queue,
         .put_sum = 0,
         .get_sum = 0,
-        .puts_done = 0,
+        .puts_done = false,
         .get_count = 0,
     };
 
@@ -186,7 +180,7 @@ test "std.atomic.Queue" {
             }
         }
         expect(!context.queue.isEmpty());
-        context.puts_done = 1;
+        context.puts_done = true;
         {
             var i: usize = 0;
             while (i < put_thread_count) : (i += 1) {
@@ -208,7 +202,7 @@ test "std.atomic.Queue" {
 
         for (putters) |t|
             t.wait();
-        @atomicStore(u8, &context.puts_done, 1, AtomicOrder.SeqCst);
+        @atomicStore(bool, &context.puts_done, true, .SeqCst);
         for (getters) |t|
             t.wait();
 
@@ -235,25 +229,25 @@ fn startPuts(ctx: *Context) u8 {
         std.time.sleep(1); // let the os scheduler be our fuzz
         const x = @bitCast(i32, r.random.scalar(u32));
         const node = ctx.allocator.create(Queue(i32).Node) catch unreachable;
-        node.* = Queue(i32).Node{
+        node.* = .{
             .prev = undefined,
             .next = undefined,
             .data = x,
         };
         ctx.queue.put(node);
-        _ = @atomicRmw(isize, &ctx.put_sum, builtin.AtomicRmwOp.Add, x, AtomicOrder.SeqCst);
+        _ = @atomicRmw(isize, &ctx.put_sum, .Add, x, .SeqCst);
     }
     return 0;
 }
 
 fn startGets(ctx: *Context) u8 {
     while (true) {
-        const last = @atomicLoad(u8, &ctx.puts_done, builtin.AtomicOrder.SeqCst) == 1;
+        const last = @atomicLoad(bool, &ctx.puts_done, .SeqCst);
 
         while (ctx.queue.get()) |node| {
             std.time.sleep(1); // let the os scheduler be our fuzz
-            _ = @atomicRmw(isize, &ctx.get_sum, builtin.AtomicRmwOp.Add, node.data, builtin.AtomicOrder.SeqCst);
-            _ = @atomicRmw(usize, &ctx.get_count, builtin.AtomicRmwOp.Add, 1, builtin.AtomicOrder.SeqCst);
+            _ = @atomicRmw(isize, &ctx.get_sum, .Add, node.data, .SeqCst);
+            _ = @atomicRmw(usize, &ctx.get_count, .Add, 1, .SeqCst);
         }
 
         if (last) return 0;
@@ -326,17 +320,16 @@ test "std.atomic.Queue single-threaded" {
 
 test "std.atomic.Queue dump" {
     const mem = std.mem;
-    const SliceOutStream = std.io.SliceOutStream;
     var buffer: [1024]u8 = undefined;
     var expected_buffer: [1024]u8 = undefined;
-    var sos = SliceOutStream.init(buffer[0..]);
+    var fbs = std.io.fixedBufferStream(&buffer);
 
     var queue = Queue(i32).init();
 
     // Test empty stream
-    sos.reset();
-    try queue.dumpToStream(SliceOutStream.Error, &sos.stream);
-    expect(mem.eql(u8, buffer[0..sos.pos],
+    fbs.reset();
+    try queue.dumpToStream(fbs.outStream());
+    expect(mem.eql(u8, buffer[0..fbs.pos],
         \\head: (null)
         \\tail: (null)
         \\
@@ -350,8 +343,8 @@ test "std.atomic.Queue dump" {
     };
     queue.put(&node_0);
 
-    sos.reset();
-    try queue.dumpToStream(SliceOutStream.Error, &sos.stream);
+    fbs.reset();
+    try queue.dumpToStream(fbs.outStream());
 
     var expected = try std.fmt.bufPrint(expected_buffer[0..],
         \\head: 0x{x}=1
@@ -360,7 +353,7 @@ test "std.atomic.Queue dump" {
         \\ (null)
         \\
     , .{ @ptrToInt(queue.head), @ptrToInt(queue.tail) });
-    expect(mem.eql(u8, buffer[0..sos.pos], expected));
+    expect(mem.eql(u8, buffer[0..fbs.pos], expected));
 
     // Test a stream with two elements
     var node_1 = Queue(i32).Node{
@@ -370,8 +363,8 @@ test "std.atomic.Queue dump" {
     };
     queue.put(&node_1);
 
-    sos.reset();
-    try queue.dumpToStream(SliceOutStream.Error, &sos.stream);
+    fbs.reset();
+    try queue.dumpToStream(fbs.outStream());
 
     expected = try std.fmt.bufPrint(expected_buffer[0..],
         \\head: 0x{x}=1
@@ -381,5 +374,5 @@ test "std.atomic.Queue dump" {
         \\ (null)
         \\
     , .{ @ptrToInt(queue.head), @ptrToInt(queue.head.?.next), @ptrToInt(queue.tail) });
-    expect(mem.eql(u8, buffer[0..sos.pos], expected));
+    expect(mem.eql(u8, buffer[0..fbs.pos], expected));
 }
diff --git a/lib/std/atomic/stack.zig b/lib/std/atomic/stack.zig
index 0f67a257cc..092dce15b0 100644
--- a/lib/std/atomic/stack.zig
+++ b/lib/std/atomic/stack.zig
@@ -1,6 +1,5 @@
 const assert = std.debug.assert;
 const builtin = @import("builtin");
-const AtomicOrder = builtin.AtomicOrder;
 const expect = std.testing.expect;
 
 /// Many reader, many writer, non-allocating, thread-safe
@@ -11,7 +10,7 @@ pub fn Stack(comptime T: type) type {
         root: ?*Node,
         lock: @TypeOf(lock_init),
 
-        const lock_init = if (builtin.single_threaded) {} else @as(u8, 0);
+        const lock_init = if (builtin.single_threaded) {} else false;
 
         pub const Self = @This();
 
@@ -31,7 +30,7 @@ pub fn Stack(comptime T: type) type {
         /// being the first item in the stack, returns the other item that was there.
         pub fn pushFirst(self: *Self, node: *Node) ?*Node {
             node.next = null;
-            return @cmpxchgStrong(?*Node, &self.root, null, node, AtomicOrder.SeqCst, AtomicOrder.SeqCst);
+            return @cmpxchgStrong(?*Node, &self.root, null, node, .SeqCst, .SeqCst);
         }
 
         pub fn push(self: *Self, node: *Node) void {
@@ -39,8 +38,8 @@ pub fn Stack(comptime T: type) type {
                 node.next = self.root;
                 self.root = node;
             } else {
-                while (@atomicRmw(u8, &self.lock, builtin.AtomicRmwOp.Xchg, 1, AtomicOrder.SeqCst) != 0) {}
-                defer assert(@atomicRmw(u8, &self.lock, builtin.AtomicRmwOp.Xchg, 0, AtomicOrder.SeqCst) == 1);
+                while (@atomicRmw(bool, &self.lock, .Xchg, true, .SeqCst)) {}
+                defer assert(@atomicRmw(bool, &self.lock, .Xchg, false, .SeqCst));
 
                 node.next = self.root;
                 self.root = node;
@@ -53,8 +52,8 @@ pub fn Stack(comptime T: type) type {
                 self.root = root.next;
                 return root;
             } else {
-                while (@atomicRmw(u8, &self.lock, builtin.AtomicRmwOp.Xchg, 1, AtomicOrder.SeqCst) != 0) {}
-                defer assert(@atomicRmw(u8, &self.lock, builtin.AtomicRmwOp.Xchg, 0, AtomicOrder.SeqCst) == 1);
+                while (@atomicRmw(bool, &self.lock, .Xchg, true, .SeqCst)) {}
+                defer assert(@atomicRmw(bool, &self.lock, .Xchg, false, .SeqCst));
 
                 const root = self.root orelse return null;
                 self.root = root.next;
@@ -63,7 +62,7 @@ pub fn Stack(comptime T: type) type {
         }
 
         pub fn isEmpty(self: *Self) bool {
-            return @atomicLoad(?*Node, &self.root, AtomicOrder.SeqCst) == null;
+            return @atomicLoad(?*Node, &self.root, .SeqCst) == null;
         }
     };
 }
@@ -75,7 +74,7 @@ const Context = struct {
     put_sum: isize,
     get_sum: isize,
     get_count: usize,
-    puts_done: u8, // TODO make this a bool
+    puts_done: bool,
 };
 // TODO add lazy evaluated build options and then put puts_per_thread behind
 // some option such as: "AggressiveMultithreadedFuzzTest". In the AppVeyor
@@ -98,7 +97,7 @@ test "std.atomic.stack" {
         .stack = &stack,
         .put_sum = 0,
         .get_sum = 0,
-        .puts_done = 0,
+        .puts_done = false,
         .get_count = 0,
     };
 
@@ -109,7 +108,7 @@ test "std.atomic.stack" {
                 expect(startPuts(&context) == 0);
             }
         }
-        context.puts_done = 1;
+        context.puts_done = true;
         {
             var i: usize = 0;
             while (i < put_thread_count) : (i += 1) {
@@ -128,7 +127,7 @@ test "std.atomic.stack" {
 
         for (putters) |t|
             t.wait();
-        @atomicStore(u8, &context.puts_done, 1, AtomicOrder.SeqCst);
+        @atomicStore(bool, &context.puts_done, true, .SeqCst);
         for (getters) |t|
             t.wait();
     }
@@ -158,19 +157,19 @@ fn startPuts(ctx: *Context) u8 {
             .data = x,
         };
         ctx.stack.push(node);
-        _ = @atomicRmw(isize, &ctx.put_sum, builtin.AtomicRmwOp.Add, x, AtomicOrder.SeqCst);
+        _ = @atomicRmw(isize, &ctx.put_sum, .Add, x, .SeqCst);
     }
     return 0;
 }
 
 fn startGets(ctx: *Context) u8 {
     while (true) {
-        const last = @atomicLoad(u8, &ctx.puts_done, builtin.AtomicOrder.SeqCst) == 1;
+        const last = @atomicLoad(bool, &ctx.puts_done, .SeqCst);
 
         while (ctx.stack.pop()) |node| {
             std.time.sleep(1); // let the os scheduler be our fuzz
-            _ = @atomicRmw(isize, &ctx.get_sum, builtin.AtomicRmwOp.Add, node.data, builtin.AtomicOrder.SeqCst);
-            _ = @atomicRmw(usize, &ctx.get_count, builtin.AtomicRmwOp.Add, 1, builtin.AtomicOrder.SeqCst);
+            _ = @atomicRmw(isize, &ctx.get_sum, .Add, node.data, .SeqCst);
+            _ = @atomicRmw(usize, &ctx.get_count, .Add, 1, .SeqCst);
         }
 
         if (last) return 0;
diff --git a/lib/std/buffer.zig b/lib/std/buffer.zig
index 9bf024191e..a1e29ef51a 100644
--- a/lib/std/buffer.zig
+++ b/lib/std/buffer.zig
@@ -65,13 +65,9 @@ pub const Buffer = struct {
     }
 
     pub fn allocPrint(allocator: *Allocator, comptime format: []const u8, args: var) !Buffer {
-        const countSize = struct {
-            fn countSize(size: *usize, bytes: []const u8) (error{}!void) {
-                size.* += bytes.len;
-            }
-        }.countSize;
-        var size: usize = 0;
-        std.fmt.format(&size, error{}, countSize, format, args) catch |err| switch (err) {};
+        const size = std.math.cast(usize, std.fmt.count(format, args)) catch |err| switch (err) {
+            error.Overflow => return error.OutOfMemory,
+        };
         var self = try Buffer.initSize(allocator, size);
         assert((std.fmt.bufPrint(self.list.items, format, args) catch unreachable).len == size);
         return self;
@@ -154,8 +150,15 @@ pub const Buffer = struct {
         mem.copy(u8, self.list.toSlice(), m);
     }
 
-    pub fn print(self: *Buffer, comptime fmt: []const u8, args: var) !void {
-        return std.fmt.format(self, error{OutOfMemory}, Buffer.append, fmt, args);
+    pub fn outStream(self: *Buffer) std.io.OutStream(*Buffer, error{OutOfMemory}, appendWrite) {
+        return .{ .context = self };
+    }
+
+    /// Same as `append` except it returns the number of bytes written, which is always the same
+    /// as `m.len`. The purpose of this function existing is to match `std.io.OutStream` API.
+    pub fn appendWrite(self: *Buffer, m: []const u8) !usize {
+        try self.append(m);
+        return m.len;
     }
 };
 
@@ -205,6 +208,18 @@ test "Buffer.print" {
     var buf = try Buffer.init(testing.allocator, "");
     defer buf.deinit();
 
-    try buf.print("Hello {} the {}", .{ 2, "world" });
+    try buf.outStream().print("Hello {} the {}", .{ 2, "world" });
     testing.expect(buf.eql("Hello 2 the world"));
 }
+
+test "Buffer.outStream" {
+    var buffer = try Buffer.initSize(testing.allocator, 0);
+    defer buffer.deinit();
+    const buf_stream = buffer.outStream();
+
+    const x: i32 = 42;
+    const y: i32 = 1234;
+    try buf_stream.print("x: {}\ny: {}\n", .{ x, y });
+
+    testing.expect(mem.eql(u8, buffer.toSlice(), "x: 42\ny: 1234\n"));
+}
diff --git a/lib/std/build.zig b/lib/std/build.zig
index bc8b8acba0..e8484e9d1c 100644
--- a/lib/std/build.zig
+++ b/lib/std/build.zig
@@ -926,8 +926,7 @@ pub const Builder = struct {
 
         try child.spawn();
 
-        var stdout_file_in_stream = child.stdout.?.inStream();
-        const stdout = try stdout_file_in_stream.stream.readAllAlloc(self.allocator, max_output_size);
+        const stdout = try child.stdout.?.inStream().readAllAlloc(self.allocator, max_output_size);
         errdefer self.allocator.free(stdout);
 
         const term = try child.wait();
diff --git a/lib/std/build/emit_raw.zig b/lib/std/build/emit_raw.zig
index 44e0227b6e..8b4747e8a7 100644
--- a/lib/std/build/emit_raw.zig
+++ b/lib/std/build/emit_raw.zig
@@ -14,11 +14,6 @@ const io = std.io;
 const sort = std.sort;
 const warn = std.debug.warn;
 
-const BinOutStream = io.OutStream(anyerror);
-const BinSeekStream = io.SeekableStream(anyerror, anyerror);
-const ElfSeekStream = io.SeekableStream(anyerror, anyerror);
-const ElfInStream = io.InStream(anyerror);
-
 const BinaryElfSection = struct {
     elfOffset: u64,
     binaryOffset: u64,
@@ -41,22 +36,19 @@ const BinaryElfOutput = struct {
 
     const Self = @This();
 
-    pub fn init(allocator: *Allocator) Self {
-        return Self{
-            .segments = ArrayList(*BinaryElfSegment).init(allocator),
-            .sections = ArrayList(*BinaryElfSection).init(allocator),
-        };
-    }
-
     pub fn deinit(self: *Self) void {
         self.sections.deinit();
         self.segments.deinit();
     }
 
-    pub fn parseElf(self: *Self, elfFile: elf.Elf) !void {
-        const allocator = self.segments.allocator;
+    pub fn parse(allocator: *Allocator, elf_file: File) !Self {
+        var self: Self = .{
+            .segments = ArrayList(*BinaryElfSegment).init(allocator),
+            .sections = ArrayList(*BinaryElfSection).init(allocator),
+        };
+        const elf_hdrs = try std.elf.readAllHeaders(allocator, elf_file);
 
-        for (elfFile.section_headers) |section, i| {
+        for (elf_hdrs.section_headers) |section, i| {
             if (sectionValidForOutput(section)) {
                 const newSection = try allocator.create(BinaryElfSection);
 
@@ -69,19 +61,19 @@ const BinaryElfOutput = struct {
             }
         }
 
-        for (elfFile.program_headers) |programHeader, i| {
-            if (programHeader.p_type == elf.PT_LOAD) {
+        for (elf_hdrs.program_headers) |phdr, i| {
+            if (phdr.p_type == elf.PT_LOAD) {
                 const newSegment = try allocator.create(BinaryElfSegment);
 
-                newSegment.physicalAddress = if (programHeader.p_paddr != 0) programHeader.p_paddr else programHeader.p_vaddr;
-                newSegment.virtualAddress = programHeader.p_vaddr;
-                newSegment.fileSize = @intCast(usize, programHeader.p_filesz);
-                newSegment.elfOffset = programHeader.p_offset;
+                newSegment.physicalAddress = if (phdr.p_paddr != 0) phdr.p_paddr else phdr.p_vaddr;
+                newSegment.virtualAddress = phdr.p_vaddr;
+                newSegment.fileSize = @intCast(usize, phdr.p_filesz);
+                newSegment.elfOffset = phdr.p_offset;
                 newSegment.binaryOffset = 0;
                 newSegment.firstSection = null;
 
                 for (self.sections.toSlice()) |section| {
-                    if (sectionWithinSegment(section, programHeader)) {
+                    if (sectionWithinSegment(section, phdr)) {
                         if (section.segment) |sectionSegment| {
                             if (sectionSegment.elfOffset > newSegment.elfOffset) {
                                 section.segment = newSegment;
@@ -126,14 +118,17 @@ const BinaryElfOutput = struct {
         }
 
         sort.sort(*BinaryElfSection, self.sections.toSlice(), sectionSortCompare);
+
+        return self;
     }
 
-    fn sectionWithinSegment(section: *BinaryElfSection, segment: elf.ProgramHeader) bool {
+    fn sectionWithinSegment(section: *BinaryElfSection, segment: elf.Elf64_Phdr) bool {
         return segment.p_offset <= section.elfOffset and (segment.p_offset + segment.p_filesz) >= (section.elfOffset + section.fileSize);
     }
 
-    fn sectionValidForOutput(section: elf.SectionHeader) bool {
-        return section.sh_size > 0 and section.sh_type != elf.SHT_NOBITS and ((section.sh_flags & elf.SHF_ALLOC) == elf.SHF_ALLOC);
+    fn sectionValidForOutput(shdr: var) bool {
+        return shdr.sh_size > 0 and shdr.sh_type != elf.SHT_NOBITS and
+            ((shdr.sh_flags & elf.SHF_ALLOC) == elf.SHF_ALLOC);
     }
 
     fn segmentSortCompare(left: *BinaryElfSegment, right: *BinaryElfSegment) bool {
@@ -151,60 +146,27 @@ const BinaryElfOutput = struct {
     }
 };
 
-const WriteContext = struct {
-    inStream: *ElfInStream,
-    inSeekStream: *ElfSeekStream,
-    outStream: *BinOutStream,
-    outSeekStream: *BinSeekStream,
-};
+fn writeBinaryElfSection(elf_file: File, out_file: File, section: *BinaryElfSection) !void {
+    try out_file.seekTo(section.binaryOffset);
 
-fn writeBinaryElfSection(allocator: *Allocator, context: WriteContext, section: *BinaryElfSection) !void {
-    var readBuffer = try allocator.alloc(u8, section.fileSize);
-    defer allocator.free(readBuffer);
-
-    try context.inSeekStream.seekTo(section.elfOffset);
-    _ = try context.inStream.read(readBuffer);
-
-    try context.outSeekStream.seekTo(section.binaryOffset);
-    try context.outStream.write(readBuffer);
+    try out_file.writeFileAll(elf_file, .{
+        .in_offset = section.elfOffset,
+        .in_len = section.fileSize,
+    });
 }
 
-fn emit_raw(allocator: *Allocator, elf_path: []const u8, raw_path: []const u8) !void {
-    var arenaAlloc = ArenaAllocator.init(allocator);
-    errdefer arenaAlloc.deinit();
-    var arena_allocator = &arenaAlloc.allocator;
+fn emitRaw(allocator: *Allocator, elf_path: []const u8, raw_path: []const u8) !void {
+    var elf_file = try fs.cwd().openFile(elf_path, .{});
+    defer elf_file.close();
 
-    const currentDir = fs.cwd();
+    var out_file = try fs.cwd().createFile(raw_path, .{});
+    defer out_file.close();
 
-    var file = try currentDir.openFile(elf_path, File.OpenFlags{});
-    defer file.close();
+    var binary_elf_output = try BinaryElfOutput.parse(allocator, elf_file);
+    defer binary_elf_output.deinit();
 
-    var fileInStream = file.inStream();
-    var fileSeekStream = file.seekableStream();
-
-    var elfFile = try elf.Elf.openStream(allocator, @ptrCast(*ElfSeekStream, &fileSeekStream.stream), @ptrCast(*ElfInStream, &fileInStream.stream));
-    defer elfFile.close();
-
-    var outFile = try currentDir.createFile(raw_path, File.CreateFlags{});
-    defer outFile.close();
-
-    var outFileOutStream = outFile.outStream();
-    var outFileSeekStream = outFile.seekableStream();
-
-    const writeContext = WriteContext{
-        .inStream = @ptrCast(*ElfInStream, &fileInStream.stream),
-        .inSeekStream = @ptrCast(*ElfSeekStream, &fileSeekStream.stream),
-        .outStream = @ptrCast(*BinOutStream, &outFileOutStream.stream),
-        .outSeekStream = @ptrCast(*BinSeekStream, &outFileSeekStream.stream),
-    };
-
-    var binaryElfOutput = BinaryElfOutput.init(arena_allocator);
-    defer binaryElfOutput.deinit();
-
-    try binaryElfOutput.parseElf(elfFile);
-
-    for (binaryElfOutput.sections.toSlice()) |section| {
-        try writeBinaryElfSection(allocator, writeContext, section);
+    for (binary_elf_output.sections.toSlice()) |section| {
+        try writeBinaryElfSection(elf_file, out_file, section);
     }
 }
 
@@ -250,6 +212,6 @@ pub const InstallRawStep = struct {
         const full_dest_path = builder.getInstallPath(self.dest_dir, self.dest_filename);
 
         fs.cwd().makePath(builder.getInstallPath(self.dest_dir, "")) catch unreachable;
-        try emit_raw(builder.allocator, full_src_path, full_dest_path);
+        try emitRaw(builder.allocator, full_src_path, full_dest_path);
     }
 };
diff --git a/lib/std/build/run.zig b/lib/std/build/run.zig
index 41417572ca..91ecd56c3a 100644
--- a/lib/std/build/run.zig
+++ b/lib/std/build/run.zig
@@ -175,8 +175,7 @@ pub const RunStep = struct {
 
         switch (self.stdout_action) {
             .expect_exact, .expect_matches => {
-                var stdout_file_in_stream = child.stdout.?.inStream();
-                stdout = stdout_file_in_stream.stream.readAllAlloc(self.builder.allocator, max_stdout_size) catch unreachable;
+                stdout = child.stdout.?.inStream().readAllAlloc(self.builder.allocator, max_stdout_size) catch unreachable;
             },
             .inherit, .ignore => {},
         }
@@ -186,8 +185,7 @@ pub const RunStep = struct {
 
         switch (self.stderr_action) {
             .expect_exact, .expect_matches => {
-                var stderr_file_in_stream = child.stderr.?.inStream();
-                stderr = stderr_file_in_stream.stream.readAllAlloc(self.builder.allocator, max_stdout_size) catch unreachable;
+                stderr = child.stderr.?.inStream().readAllAlloc(self.builder.allocator, max_stdout_size) catch unreachable;
             },
             .inherit, .ignore => {},
         }
diff --git a/lib/std/builtin.zig b/lib/std/builtin.zig
index 1190b595ef..3dbd82b2b5 100644
--- a/lib/std/builtin.zig
+++ b/lib/std/builtin.zig
@@ -436,19 +436,17 @@ pub const Version = struct {
         self: Version,
         comptime fmt: []const u8,
         options: std.fmt.FormatOptions,
-        context: var,
-        comptime Error: type,
-        comptime output: fn (@TypeOf(context), []const u8) Error!void,
-    ) Error!void {
+        out_stream: var,
+    ) !void {
         if (fmt.len == 0) {
             if (self.patch == 0) {
                 if (self.minor == 0) {
-                    return std.fmt.format(context, Error, output, "{}", .{self.major});
+                    return std.fmt.format(out_stream, "{}", .{self.major});
                 } else {
-                    return std.fmt.format(context, Error, output, "{}.{}", .{ self.major, self.minor });
+                    return std.fmt.format(out_stream, "{}.{}", .{ self.major, self.minor });
                 }
             } else {
-                return std.fmt.format(context, Error, output, "{}.{}.{}", .{ self.major, self.minor, self.patch });
+                return std.fmt.format(out_stream, "{}.{}.{}", .{ self.major, self.minor, self.patch });
             }
         } else {
             @compileError("Unknown format string: '" ++ fmt ++ "'");
diff --git a/lib/std/c.zig b/lib/std/c.zig
index 7c01908540..39a865ebbc 100644
--- a/lib/std/c.zig
+++ b/lib/std/c.zig
@@ -79,6 +79,7 @@ pub extern "c" fn fstatat(dirfd: fd_t, path: [*:0]const u8, stat_buf: *Stat, fla
 pub extern "c" fn lseek(fd: fd_t, offset: off_t, whence: c_int) off_t;
 pub extern "c" fn open(path: [*:0]const u8, oflag: c_uint, ...) c_int;
 pub extern "c" fn openat(fd: c_int, path: [*:0]const u8, oflag: c_uint, ...) c_int;
+pub extern "c" fn ftruncate(fd: c_int, length: off_t) c_int;
 pub extern "c" fn raise(sig: c_int) c_int;
 pub extern "c" fn read(fd: fd_t, buf: [*]u8, nbyte: usize) isize;
 pub extern "c" fn readv(fd: c_int, iov: [*]const iovec, iovcnt: c_uint) isize;
diff --git a/lib/std/c/linux.zig b/lib/std/c/linux.zig
index 7ac5ecd3fe..1da0db57d6 100644
--- a/lib/std/c/linux.zig
+++ b/lib/std/c/linux.zig
@@ -82,6 +82,8 @@ pub extern "c" fn sigaltstack(ss: ?*stack_t, old_ss: ?*stack_t) c_int;
 
 pub extern "c" fn memfd_create(name: [*:0]const u8, flags: c_uint) c_int;
 
+pub extern "c" fn ftruncate64(fd: c_int, length: off_t) c_int;
+
 pub extern "c" fn sendfile(
     out_fd: fd_t,
     in_fd: fd_t,
diff --git a/lib/std/child_process.zig b/lib/std/child_process.zig
index 4f5fc2b496..008fc34ff6 100644
--- a/lib/std/child_process.zig
+++ b/lib/std/child_process.zig
@@ -217,13 +217,13 @@ pub const ChildProcess = struct {
 
         try child.spawn();
 
-        var stdout_file_in_stream = child.stdout.?.inStream();
-        var stderr_file_in_stream = child.stderr.?.inStream();
+        const stdout_in = child.stdout.?.inStream();
+        const stderr_in = child.stderr.?.inStream();
 
         // TODO need to poll to read these streams to prevent a deadlock (or rely on evented I/O).
-        const stdout = try stdout_file_in_stream.stream.readAllAlloc(args.allocator, args.max_output_bytes);
+        const stdout = try stdout_in.readAllAlloc(args.allocator, args.max_output_bytes);
         errdefer args.allocator.free(stdout);
-        const stderr = try stderr_file_in_stream.stream.readAllAlloc(args.allocator, args.max_output_bytes);
+        const stderr = try stderr_in.readAllAlloc(args.allocator, args.max_output_bytes);
         errdefer args.allocator.free(stderr);
 
         return ExecResult{
@@ -780,7 +780,7 @@ fn windowsCreateCommandLine(allocator: *mem.Allocator, argv: []const []const u8)
     var buf = try Buffer.initSize(allocator, 0);
     defer buf.deinit();
 
-    var buf_stream = &io.BufferOutStream.init(&buf).stream;
+    var buf_stream = buf.outStream();
 
     for (argv) |arg, arg_i| {
         if (arg_i != 0) try buf.appendByte(' ');
@@ -857,8 +857,7 @@ fn writeIntFd(fd: i32, value: ErrInt) !void {
         .io_mode = .blocking,
         .async_block_allowed = File.async_block_allowed_yes,
     };
-    const stream = &file.outStream().stream;
-    stream.writeIntNative(u64, @intCast(u64, value)) catch return error.SystemResources;
+    file.outStream().writeIntNative(u64, @intCast(u64, value)) catch return error.SystemResources;
 }
 
 fn readIntFd(fd: i32) !ErrInt {
@@ -867,8 +866,7 @@ fn readIntFd(fd: i32) !ErrInt {
         .io_mode = .blocking,
         .async_block_allowed = File.async_block_allowed_yes,
     };
-    const stream = &file.inStream().stream;
-    return @intCast(ErrInt, stream.readIntNative(u64) catch return error.SystemResources);
+    return @intCast(ErrInt, file.inStream().readIntNative(u64) catch return error.SystemResources);
 }
 
 /// Caller must free result.
diff --git a/lib/std/coff.zig b/lib/std/coff.zig
index b1be21c4d3..2e17f46454 100644
--- a/lib/std/coff.zig
+++ b/lib/std/coff.zig
@@ -56,8 +56,7 @@ pub const Coff = struct {
     pub fn loadHeader(self: *Coff) !void {
         const pe_pointer_offset = 0x3C;
 
-        var file_stream = self.in_file.inStream();
-        const in = &file_stream.stream;
+        const in = self.in_file.inStream();
 
         var magic: [2]u8 = undefined;
         try in.readNoEof(magic[0..]);
@@ -89,11 +88,11 @@ pub const Coff = struct {
             else => return error.InvalidMachine,
         }
 
-        try self.loadOptionalHeader(&file_stream);
+        try self.loadOptionalHeader();
     }
 
-    fn loadOptionalHeader(self: *Coff, file_stream: *File.InStream) !void {
-        const in = &file_stream.stream;
+    fn loadOptionalHeader(self: *Coff) !void {
+        const in = self.in_file.inStream();
         self.pe_header.magic = try in.readIntLittle(u16);
         // For now we're only interested in finding the reference to the .pdb,
         // so we'll skip most of this header, which size is different in 32
@@ -136,8 +135,7 @@ pub const Coff = struct {
         const debug_dir = &self.pe_header.data_directory[DEBUG_DIRECTORY];
         const file_offset = debug_dir.virtual_address - header.virtual_address + header.pointer_to_raw_data;
 
-        var file_stream = self.in_file.inStream();
-        const in = &file_stream.stream;
+        const in = self.in_file.inStream();
         try self.in_file.seekTo(file_offset);
 
         // Find the correct DebugDirectoryEntry, and where its data is stored.
@@ -188,8 +186,7 @@ pub const Coff = struct {
 
         try self.sections.ensureCapacity(self.coff_header.number_of_sections);
 
-        var file_stream = self.in_file.inStream();
-        const in = &file_stream.stream;
+        const in = self.in_file.inStream();
 
         var name: [8]u8 = undefined;
 
diff --git a/lib/std/debug.zig b/lib/std/debug.zig
index 558b7e0513..0a7a0dee7e 100644
--- a/lib/std/debug.zig
+++ b/lib/std/debug.zig
@@ -55,7 +55,7 @@ pub const LineInfo = struct {
 var stderr_file: File = undefined;
 var stderr_file_out_stream: File.OutStream = undefined;
 
-var stderr_stream: ?*io.OutStream(File.WriteError) = null;
+var stderr_stream: ?*File.OutStream = null;
 var stderr_mutex = std.Mutex.init();
 
 pub fn warn(comptime fmt: []const u8, args: var) void {
@@ -65,13 +65,13 @@ pub fn warn(comptime fmt: []const u8, args: var) void {
     noasync stderr.print(fmt, args) catch return;
 }
 
-pub fn getStderrStream() *io.OutStream(File.WriteError) {
+pub fn getStderrStream() *File.OutStream {
     if (stderr_stream) |st| {
         return st;
     } else {
         stderr_file = io.getStdErr();
         stderr_file_out_stream = stderr_file.outStream();
-        const st = &stderr_file_out_stream.stream;
+        const st = &stderr_file_out_stream;
         stderr_stream = st;
         return st;
     }
@@ -408,15 +408,15 @@ pub const TTY = struct {
         windows_api,
 
         fn setColor(conf: Config, out_stream: var, color: Color) void {
-            switch (conf) {
+            noasync switch (conf) {
                 .no_color => return,
                 .escape_codes => switch (color) {
-                    .Red => noasync out_stream.write(RED) catch return,
-                    .Green => noasync out_stream.write(GREEN) catch return,
-                    .Cyan => noasync out_stream.write(CYAN) catch return,
-                    .White, .Bold => noasync out_stream.write(WHITE) catch return,
-                    .Dim => noasync out_stream.write(DIM) catch return,
-                    .Reset => noasync out_stream.write(RESET) catch return,
+                    .Red => out_stream.writeAll(RED) catch return,
+                    .Green => out_stream.writeAll(GREEN) catch return,
+                    .Cyan => out_stream.writeAll(CYAN) catch return,
+                    .White, .Bold => out_stream.writeAll(WHITE) catch return,
+                    .Dim => out_stream.writeAll(DIM) catch return,
+                    .Reset => out_stream.writeAll(RESET) catch return,
                 },
                 .windows_api => if (builtin.os.tag == .windows) {
                     const S = struct {
@@ -455,7 +455,7 @@ pub const TTY = struct {
                 } else {
                     unreachable;
                 },
-            }
+            };
         }
     };
 };
@@ -475,15 +475,15 @@ fn populateModule(di: *ModuleDebugInfo, mod: *Module) !void {
 
     const modi = di.pdb.getStreamById(mod.mod_info.ModuleSymStream) orelse return error.MissingDebugInfo;
 
-    const signature = try modi.stream.readIntLittle(u32);
+    const signature = try modi.inStream().readIntLittle(u32);
     if (signature != 4)
         return error.InvalidDebugInfo;
 
     mod.symbols = try allocator.alloc(u8, mod.mod_info.SymByteSize - 4);
-    try modi.stream.readNoEof(mod.symbols);
+    try modi.inStream().readNoEof(mod.symbols);
 
     mod.subsect_info = try allocator.alloc(u8, mod.mod_info.C13ByteSize);
-    try modi.stream.readNoEof(mod.subsect_info);
+    try modi.inStream().readNoEof(mod.subsect_info);
 
     var sect_offset: usize = 0;
     var skip_len: usize = undefined;
@@ -565,38 +565,40 @@ fn printLineInfo(
     tty_config: TTY.Config,
     comptime printLineFromFile: var,
 ) !void {
-    tty_config.setColor(out_stream, .White);
+    noasync {
+        tty_config.setColor(out_stream, .White);
 
-    if (line_info) |*li| {
-        try noasync out_stream.print("{}:{}:{}", .{ li.file_name, li.line, li.column });
-    } else {
-        try noasync out_stream.write("???:?:?");
-    }
+        if (line_info) |*li| {
+            try out_stream.print("{}:{}:{}", .{ li.file_name, li.line, li.column });
+        } else {
+            try out_stream.writeAll("???:?:?");
+        }
 
-    tty_config.setColor(out_stream, .Reset);
-    try noasync out_stream.write(": ");
-    tty_config.setColor(out_stream, .Dim);
-    try noasync out_stream.print("0x{x} in {} ({})", .{ address, symbol_name, compile_unit_name });
-    tty_config.setColor(out_stream, .Reset);
-    try noasync out_stream.write("\n");
+        tty_config.setColor(out_stream, .Reset);
+        try out_stream.writeAll(": ");
+        tty_config.setColor(out_stream, .Dim);
+        try out_stream.print("0x{x} in {} ({})", .{ address, symbol_name, compile_unit_name });
+        tty_config.setColor(out_stream, .Reset);
+        try out_stream.writeAll("\n");
 
-    // Show the matching source code line if possible
-    if (line_info) |li| {
-        if (noasync printLineFromFile(out_stream, li)) {
-            if (li.column > 0) {
-                // The caret already takes one char
-                const space_needed = @intCast(usize, li.column - 1);
+        // Show the matching source code line if possible
+        if (line_info) |li| {
+            if (printLineFromFile(out_stream, li)) {
+                if (li.column > 0) {
+                    // The caret already takes one char
+                    const space_needed = @intCast(usize, li.column - 1);
 
-                try noasync out_stream.writeByteNTimes(' ', space_needed);
-                tty_config.setColor(out_stream, .Green);
-                try noasync out_stream.write("^");
-                tty_config.setColor(out_stream, .Reset);
+                    try out_stream.writeByteNTimes(' ', space_needed);
+                    tty_config.setColor(out_stream, .Green);
+                    try out_stream.writeAll("^");
+                    tty_config.setColor(out_stream, .Reset);
+                }
+                try out_stream.writeAll("\n");
+            } else |err| switch (err) {
+                error.EndOfFile, error.FileNotFound => {},
+                error.BadPathName => {},
+                else => return err,
             }
-            try noasync out_stream.write("\n");
-        } else |err| switch (err) {
-            error.EndOfFile, error.FileNotFound => {},
-            error.BadPathName => {},
-            else => return err,
         }
     }
 }
@@ -609,21 +611,21 @@ pub const OpenSelfDebugInfoError = error{
 };
 
 /// TODO resources https://github.com/ziglang/zig/issues/4353
-/// TODO once https://github.com/ziglang/zig/issues/3157 is fully implemented,
-/// make this `noasync fn` and remove the individual noasync calls.
 pub fn openSelfDebugInfo(allocator: *mem.Allocator) anyerror!DebugInfo {
-    if (builtin.strip_debug_info)
-        return error.MissingDebugInfo;
-    if (@hasDecl(root, "os") and @hasDecl(root.os, "debug") and @hasDecl(root.os.debug, "openSelfDebugInfo")) {
-        return noasync root.os.debug.openSelfDebugInfo(allocator);
-    }
-    switch (builtin.os.tag) {
-        .linux,
-        .freebsd,
-        .macosx,
-        .windows,
-        => return DebugInfo.init(allocator),
-        else => @compileError("openSelfDebugInfo unsupported for this platform"),
+    noasync {
+        if (builtin.strip_debug_info)
+            return error.MissingDebugInfo;
+        if (@hasDecl(root, "os") and @hasDecl(root.os, "debug") and @hasDecl(root.os.debug, "openSelfDebugInfo")) {
+            return root.os.debug.openSelfDebugInfo(allocator);
+        }
+        switch (builtin.os.tag) {
+            .linux,
+            .freebsd,
+            .macosx,
+            .windows,
+            => return DebugInfo.init(allocator),
+            else => @compileError("openSelfDebugInfo unsupported for this platform"),
+        }
     }
 }
 
@@ -654,11 +656,11 @@ fn openCoffDebugInfo(allocator: *mem.Allocator, coff_file_path: [:0]const u16) !
     try di.pdb.openFile(di.coff, path);
 
     var pdb_stream = di.pdb.getStream(pdb.StreamType.Pdb) orelse return error.InvalidDebugInfo;
-    const version = try pdb_stream.stream.readIntLittle(u32);
-    const signature = try pdb_stream.stream.readIntLittle(u32);
-    const age = try pdb_stream.stream.readIntLittle(u32);
+    const version = try pdb_stream.inStream().readIntLittle(u32);
+    const signature = try pdb_stream.inStream().readIntLittle(u32);
+    const age = try pdb_stream.inStream().readIntLittle(u32);
     var guid: [16]u8 = undefined;
-    try pdb_stream.stream.readNoEof(&guid);
+    try pdb_stream.inStream().readNoEof(&guid);
     if (version != 20000404) // VC70, only value observed by LLVM team
         return error.UnknownPDBVersion;
     if (!mem.eql(u8, &di.coff.guid, &guid) or di.coff.age != age)
@@ -666,9 +668,9 @@ fn openCoffDebugInfo(allocator: *mem.Allocator, coff_file_path: [:0]const u16) !
     // We validated the executable and pdb match.
 
     const string_table_index = str_tab_index: {
-        const name_bytes_len = try pdb_stream.stream.readIntLittle(u32);
+        const name_bytes_len = try pdb_stream.inStream().readIntLittle(u32);
         const name_bytes = try allocator.alloc(u8, name_bytes_len);
-        try pdb_stream.stream.readNoEof(name_bytes);
+        try pdb_stream.inStream().readNoEof(name_bytes);
 
         const HashTableHeader = packed struct {
             Size: u32,
@@ -678,17 +680,17 @@ fn openCoffDebugInfo(allocator: *mem.Allocator, coff_file_path: [:0]const u16) !
                 return cap * 2 / 3 + 1;
             }
         };
-        const hash_tbl_hdr = try pdb_stream.stream.readStruct(HashTableHeader);
+        const hash_tbl_hdr = try pdb_stream.inStream().readStruct(HashTableHeader);
         if (hash_tbl_hdr.Capacity == 0)
             return error.InvalidDebugInfo;
 
         if (hash_tbl_hdr.Size > HashTableHeader.maxLoad(hash_tbl_hdr.Capacity))
             return error.InvalidDebugInfo;
 
-        const present = try readSparseBitVector(&pdb_stream.stream, allocator);
+        const present = try readSparseBitVector(&pdb_stream.inStream(), allocator);
         if (present.len != hash_tbl_hdr.Size)
             return error.InvalidDebugInfo;
-        const deleted = try readSparseBitVector(&pdb_stream.stream, allocator);
+        const deleted = try readSparseBitVector(&pdb_stream.inStream(), allocator);
 
         const Bucket = struct {
             first: u32,
@@ -696,8 +698,8 @@ fn openCoffDebugInfo(allocator: *mem.Allocator, coff_file_path: [:0]const u16) !
         };
         const bucket_list = try allocator.alloc(Bucket, present.len);
         for (present) |_| {
-            const name_offset = try pdb_stream.stream.readIntLittle(u32);
-            const name_index = try pdb_stream.stream.readIntLittle(u32);
+            const name_offset = try pdb_stream.inStream().readIntLittle(u32);
+            const name_index = try pdb_stream.inStream().readIntLittle(u32);
             const name = mem.toSlice(u8, @ptrCast([*:0]u8, name_bytes.ptr + name_offset));
             if (mem.eql(u8, name, "/names")) {
                 break :str_tab_index name_index;
@@ -712,7 +714,7 @@ fn openCoffDebugInfo(allocator: *mem.Allocator, coff_file_path: [:0]const u16) !
     const dbi = di.pdb.dbi;
 
     // Dbi Header
-    const dbi_stream_header = try dbi.stream.readStruct(pdb.DbiStreamHeader);
+    const dbi_stream_header = try dbi.inStream().readStruct(pdb.DbiStreamHeader);
     if (dbi_stream_header.VersionHeader != 19990903) // V70, only value observed by LLVM team
         return error.UnknownPDBVersion;
     if (dbi_stream_header.Age != age)
@@ -726,7 +728,7 @@ fn openCoffDebugInfo(allocator: *mem.Allocator, coff_file_path: [:0]const u16) !
     // Module Info Substream
     var mod_info_offset: usize = 0;
     while (mod_info_offset != mod_info_size) {
-        const mod_info = try dbi.stream.readStruct(pdb.ModInfo);
+        const mod_info = try dbi.inStream().readStruct(pdb.ModInfo);
         var this_record_len: usize = @sizeOf(pdb.ModInfo);
 
         const module_name = try dbi.readNullTermString(allocator);
@@ -764,14 +766,14 @@ fn openCoffDebugInfo(allocator: *mem.Allocator, coff_file_path: [:0]const u16) !
     var sect_contribs = ArrayList(pdb.SectionContribEntry).init(allocator);
     var sect_cont_offset: usize = 0;
     if (section_contrib_size != 0) {
-        const ver = @intToEnum(pdb.SectionContrSubstreamVersion, try dbi.stream.readIntLittle(u32));
+        const ver = @intToEnum(pdb.SectionContrSubstreamVersion, try dbi.inStream().readIntLittle(u32));
         if (ver != pdb.SectionContrSubstreamVersion.Ver60)
             return error.InvalidDebugInfo;
         sect_cont_offset += @sizeOf(u32);
     }
     while (sect_cont_offset != section_contrib_size) {
         const entry = try sect_contribs.addOne();
-        entry.* = try dbi.stream.readStruct(pdb.SectionContribEntry);
+        entry.* = try dbi.inStream().readStruct(pdb.SectionContribEntry);
         sect_cont_offset += @sizeOf(pdb.SectionContribEntry);
 
         if (sect_cont_offset > section_contrib_size)
@@ -808,45 +810,71 @@ fn chopSlice(ptr: []const u8, offset: u64, size: u64) ![]const u8 {
 
 /// TODO resources https://github.com/ziglang/zig/issues/4353
 pub fn openElfDebugInfo(allocator: *mem.Allocator, elf_file_path: []const u8) !ModuleDebugInfo {
-    const mapped_mem = try mapWholeFile(elf_file_path);
+    noasync {
+        const mapped_mem = try mapWholeFile(elf_file_path);
+        const hdr = @ptrCast(*const elf.Ehdr, &mapped_mem[0]);
+        if (!mem.eql(u8, hdr.e_ident[0..4], "\x7fELF")) return error.InvalidElfMagic;
+        if (hdr.e_ident[elf.EI_VERSION] != 1) return error.InvalidElfVersion;
 
-    var seekable_stream = io.SliceSeekableInStream.init(mapped_mem);
-    var efile = try noasync elf.Elf.openStream(
-        allocator,
-        @ptrCast(*DW.DwarfSeekableStream, &seekable_stream.seekable_stream),
-        @ptrCast(*DW.DwarfInStream, &seekable_stream.stream),
-    );
-    defer noasync efile.close();
+        const endian: builtin.Endian = switch (hdr.e_ident[elf.EI_DATA]) {
+            elf.ELFDATA2LSB => .Little,
+            elf.ELFDATA2MSB => .Big,
+            else => return error.InvalidElfEndian,
+        };
+        assert(endian == std.builtin.endian); // this is our own debug info
 
-    const debug_info = (try noasync efile.findSection(".debug_info")) orelse
-        return error.MissingDebugInfo;
-    const debug_abbrev = (try noasync efile.findSection(".debug_abbrev")) orelse
-        return error.MissingDebugInfo;
-    const debug_str = (try noasync efile.findSection(".debug_str")) orelse
-        return error.MissingDebugInfo;
-    const debug_line = (try noasync efile.findSection(".debug_line")) orelse
-        return error.MissingDebugInfo;
-    const opt_debug_ranges = try noasync efile.findSection(".debug_ranges");
+        const shoff = hdr.e_shoff;
+        const str_section_off = shoff + @as(u64, hdr.e_shentsize) * @as(u64, hdr.e_shstrndx);
+        const str_shdr = @ptrCast(
+            *const elf.Shdr,
+            @alignCast(@alignOf(elf.Shdr), &mapped_mem[try math.cast(usize, str_section_off)]),
+        );
+        const header_strings = mapped_mem[str_shdr.sh_offset .. str_shdr.sh_offset + str_shdr.sh_size];
+        const shdrs = @ptrCast(
+            [*]const elf.Shdr,
+            @alignCast(@alignOf(elf.Shdr), &mapped_mem[shoff]),
+        )[0..hdr.e_shnum];
 
-    var di = DW.DwarfInfo{
-        .endian = efile.endian,
-        .debug_info = try chopSlice(mapped_mem, debug_info.sh_offset, debug_info.sh_size),
-        .debug_abbrev = try chopSlice(mapped_mem, debug_abbrev.sh_offset, debug_abbrev.sh_size),
-        .debug_str = try chopSlice(mapped_mem, debug_str.sh_offset, debug_str.sh_size),
-        .debug_line = try chopSlice(mapped_mem, debug_line.sh_offset, debug_line.sh_size),
-        .debug_ranges = if (opt_debug_ranges) |debug_ranges|
-            try chopSlice(mapped_mem, debug_ranges.sh_offset, debug_ranges.sh_size)
-        else
-            null,
-    };
+        var opt_debug_info: ?[]const u8 = null;
+        var opt_debug_abbrev: ?[]const u8 = null;
+        var opt_debug_str: ?[]const u8 = null;
+        var opt_debug_line: ?[]const u8 = null;
+        var opt_debug_ranges: ?[]const u8 = null;
 
-    try noasync DW.openDwarfDebugInfo(&di, allocator);
+        for (shdrs) |*shdr| {
+            if (shdr.sh_type == elf.SHT_NULL) continue;
 
-    return ModuleDebugInfo{
-        .base_address = undefined,
-        .dwarf = di,
-        .mapped_memory = mapped_mem,
-    };
+            const name = std.mem.span(@ptrCast([*:0]const u8, header_strings[shdr.sh_name..].ptr));
+            if (mem.eql(u8, name, ".debug_info")) {
+                opt_debug_info = try chopSlice(mapped_mem, shdr.sh_offset, shdr.sh_size);
+            } else if (mem.eql(u8, name, ".debug_abbrev")) {
+                opt_debug_abbrev = try chopSlice(mapped_mem, shdr.sh_offset, shdr.sh_size);
+            } else if (mem.eql(u8, name, ".debug_str")) {
+                opt_debug_str = try chopSlice(mapped_mem, shdr.sh_offset, shdr.sh_size);
+            } else if (mem.eql(u8, name, ".debug_line")) {
+                opt_debug_line = try chopSlice(mapped_mem, shdr.sh_offset, shdr.sh_size);
+            } else if (mem.eql(u8, name, ".debug_ranges")) {
+                opt_debug_ranges = try chopSlice(mapped_mem, shdr.sh_offset, shdr.sh_size);
+            }
+        }
+
+        var di = DW.DwarfInfo{
+            .endian = endian,
+            .debug_info = opt_debug_info orelse return error.MissingDebugInfo,
+            .debug_abbrev = opt_debug_abbrev orelse return error.MissingDebugInfo,
+            .debug_str = opt_debug_str orelse return error.MissingDebugInfo,
+            .debug_line = opt_debug_line orelse return error.MissingDebugInfo,
+            .debug_ranges = opt_debug_ranges,
+        };
+
+        try DW.openDwarfDebugInfo(&di, allocator);
+
+        return ModuleDebugInfo{
+            .base_address = undefined,
+            .dwarf = di,
+            .mapped_memory = mapped_mem,
+        };
+    }
 }
 
 /// TODO resources https://github.com/ziglang/zig/issues/4353
@@ -936,7 +964,9 @@ fn openMachODebugInfo(allocator: *mem.Allocator, macho_file_path: []const u8) !M
 }
 
 fn printLineFromFileAnyOs(out_stream: var, line_info: LineInfo) !void {
-    var f = try fs.cwd().openFile(line_info.file_name, .{});
+    // Need this to always block even in async I/O mode, because this could potentially
+    // be called from e.g. the event loop code crashing.
+    var f = try fs.cwd().openFile(line_info.file_name, .{ .always_blocking = true });
     defer f.close();
     // TODO fstat and make sure that the file has the correct size
 
@@ -982,22 +1012,24 @@ const MachoSymbol = struct {
     }
 };
 
-fn mapWholeFile(path: []const u8) ![]const u8 {
-    const file = try noasync fs.openFileAbsolute(path, .{ .always_blocking = true });
-    defer noasync file.close();
+fn mapWholeFile(path: []const u8) ![]align(mem.page_size) const u8 {
+    noasync {
+        const file = try fs.openFileAbsolute(path, .{ .always_blocking = true });
+        defer file.close();
 
-    const file_len = try math.cast(usize, try file.getEndPos());
-    const mapped_mem = try os.mmap(
-        null,
-        file_len,
-        os.PROT_READ,
-        os.MAP_SHARED,
-        file.handle,
-        0,
-    );
-    errdefer os.munmap(mapped_mem);
+        const file_len = try math.cast(usize, try file.getEndPos());
+        const mapped_mem = try os.mmap(
+            null,
+            file_len,
+            os.PROT_READ,
+            os.MAP_SHARED,
+            file.handle,
+            0,
+        );
+        errdefer os.munmap(mapped_mem);
 
-    return mapped_mem;
+        return mapped_mem;
+    }
 }
 
 pub const DebugInfo = struct {
diff --git a/lib/std/debug/leb128.zig b/lib/std/debug/leb128.zig
index 1d81b9390a..e2157335b5 100644
--- a/lib/std/debug/leb128.zig
+++ b/lib/std/debug/leb128.zig
@@ -121,18 +121,18 @@ pub fn readILEB128Mem(comptime T: type, ptr: *[*]const u8) !T {
 }
 
 fn test_read_stream_ileb128(comptime T: type, encoded: []const u8) !T {
-    var in_stream = std.io.SliceInStream.init(encoded);
-    return try readILEB128(T, &in_stream.stream);
+    var in_stream = std.io.fixedBufferStream(encoded);
+    return try readILEB128(T, in_stream.inStream());
 }
 
 fn test_read_stream_uleb128(comptime T: type, encoded: []const u8) !T {
-    var in_stream = std.io.SliceInStream.init(encoded);
-    return try readULEB128(T, &in_stream.stream);
+    var in_stream = std.io.fixedBufferStream(encoded);
+    return try readULEB128(T, in_stream.inStream());
 }
 
 fn test_read_ileb128(comptime T: type, encoded: []const u8) !T {
-    var in_stream = std.io.SliceInStream.init(encoded);
-    const v1 = readILEB128(T, &in_stream.stream);
+    var in_stream = std.io.fixedBufferStream(encoded);
+    const v1 = readILEB128(T, in_stream.inStream());
     var in_ptr = encoded.ptr;
     const v2 = readILEB128Mem(T, &in_ptr);
     testing.expectEqual(v1, v2);
@@ -140,8 +140,8 @@ fn test_read_ileb128(comptime T: type, encoded: []const u8) !T {
 }
 
 fn test_read_uleb128(comptime T: type, encoded: []const u8) !T {
-    var in_stream = std.io.SliceInStream.init(encoded);
-    const v1 = readULEB128(T, &in_stream.stream);
+    var in_stream = std.io.fixedBufferStream(encoded);
+    const v1 = readULEB128(T, in_stream.inStream());
     var in_ptr = encoded.ptr;
     const v2 = readULEB128Mem(T, &in_ptr);
     testing.expectEqual(v1, v2);
@@ -149,22 +149,22 @@ fn test_read_uleb128(comptime T: type, encoded: []const u8) !T {
 }
 
 fn test_read_ileb128_seq(comptime T: type, comptime N: usize, encoded: []const u8) void {
-    var in_stream = std.io.SliceInStream.init(encoded);
+    var in_stream = std.io.fixedBufferStream(encoded);
     var in_ptr = encoded.ptr;
     var i: usize = 0;
     while (i < N) : (i += 1) {
-        const v1 = readILEB128(T, &in_stream.stream);
+        const v1 = readILEB128(T, in_stream.inStream());
         const v2 = readILEB128Mem(T, &in_ptr);
         testing.expectEqual(v1, v2);
     }
 }
 
 fn test_read_uleb128_seq(comptime T: type, comptime N: usize, encoded: []const u8) void {
-    var in_stream = std.io.SliceInStream.init(encoded);
+    var in_stream = std.io.fixedBufferStream(encoded);
     var in_ptr = encoded.ptr;
     var i: usize = 0;
     while (i < N) : (i += 1) {
-        const v1 = readULEB128(T, &in_stream.stream);
+        const v1 = readULEB128(T, in_stream.inStream());
         const v2 = readULEB128Mem(T, &in_ptr);
         testing.expectEqual(v1, v2);
     }
diff --git a/lib/std/dwarf.zig b/lib/std/dwarf.zig
index 32a49b68e0..769f349e33 100644
--- a/lib/std/dwarf.zig
+++ b/lib/std/dwarf.zig
@@ -11,9 +11,6 @@ const ArrayList = std.ArrayList;
 
 usingnamespace @import("dwarf_bits.zig");
 
-pub const DwarfSeekableStream = io.SeekableStream(anyerror, anyerror);
-pub const DwarfInStream = io.InStream(anyerror);
-
 const PcRange = struct {
     start: u64,
     end: u64,
@@ -239,7 +236,7 @@ const LineNumberProgram = struct {
     }
 };
 
-fn readInitialLength(comptime E: type, in_stream: *io.InStream(E), is_64: *bool) !u64 {
+fn readInitialLength(in_stream: var, is_64: *bool) !u64 {
     const first_32_bits = try in_stream.readIntLittle(u32);
     is_64.* = (first_32_bits == 0xffffffff);
     if (is_64.*) {
@@ -414,40 +411,42 @@ pub const DwarfInfo = struct {
     }
 
     fn scanAllFunctions(di: *DwarfInfo) !void {
-        var s = io.SliceSeekableInStream.init(di.debug_info);
+        var stream = io.fixedBufferStream(di.debug_info);
+        const in = &stream.inStream();
+        const seekable = &stream.seekableStream();
         var this_unit_offset: u64 = 0;
 
-        while (this_unit_offset < try s.seekable_stream.getEndPos()) {
-            s.seekable_stream.seekTo(this_unit_offset) catch |err| switch (err) {
+        while (this_unit_offset < try seekable.getEndPos()) {
+            seekable.seekTo(this_unit_offset) catch |err| switch (err) {
                 error.EndOfStream => unreachable,
                 else => return err,
             };
 
             var is_64: bool = undefined;
-            const unit_length = try readInitialLength(@TypeOf(s.stream.readFn).ReturnType.ErrorSet, &s.stream, &is_64);
+            const unit_length = try readInitialLength(in, &is_64);
             if (unit_length == 0) return;
             const next_offset = unit_length + (if (is_64) @as(usize, 12) else @as(usize, 4));
 
-            const version = try s.stream.readInt(u16, di.endian);
+            const version = try in.readInt(u16, di.endian);
             if (version < 2 or version > 5) return error.InvalidDebugInfo;
 
-            const debug_abbrev_offset = if (is_64) try s.stream.readInt(u64, di.endian) else try s.stream.readInt(u32, di.endian);
+            const debug_abbrev_offset = if (is_64) try in.readInt(u64, di.endian) else try in.readInt(u32, di.endian);
 
-            const address_size = try s.stream.readByte();
+            const address_size = try in.readByte();
             if (address_size != @sizeOf(usize)) return error.InvalidDebugInfo;
 
-            const compile_unit_pos = try s.seekable_stream.getPos();
+            const compile_unit_pos = try seekable.getPos();
             const abbrev_table = try di.getAbbrevTable(debug_abbrev_offset);
 
-            try s.seekable_stream.seekTo(compile_unit_pos);
+            try seekable.seekTo(compile_unit_pos);
 
             const next_unit_pos = this_unit_offset + next_offset;
 
-            while ((try s.seekable_stream.getPos()) < next_unit_pos) {
-                const die_obj = (try di.parseDie(&s.stream, abbrev_table, is_64)) orelse continue;
+            while ((try seekable.getPos()) < next_unit_pos) {
+                const die_obj = (try di.parseDie(in, abbrev_table, is_64)) orelse continue;
                 defer die_obj.attrs.deinit();
 
-                const after_die_offset = try s.seekable_stream.getPos();
+                const after_die_offset = try seekable.getPos();
 
                 switch (die_obj.tag_id) {
                     TAG_subprogram, TAG_inlined_subroutine, TAG_subroutine, TAG_entry_point => {
@@ -463,14 +462,14 @@ pub const DwarfInfo = struct {
                                     // Follow the DIE it points to and repeat
                                     const ref_offset = try this_die_obj.getAttrRef(AT_abstract_origin);
                                     if (ref_offset > next_offset) return error.InvalidDebugInfo;
-                                    try s.seekable_stream.seekTo(this_unit_offset + ref_offset);
-                                    this_die_obj = (try di.parseDie(&s.stream, abbrev_table, is_64)) orelse return error.InvalidDebugInfo;
+                                    try seekable.seekTo(this_unit_offset + ref_offset);
+                                    this_die_obj = (try di.parseDie(in, abbrev_table, is_64)) orelse return error.InvalidDebugInfo;
                                 } else if (this_die_obj.getAttr(AT_specification)) |ref| {
                                     // Follow the DIE it points to and repeat
                                     const ref_offset = try this_die_obj.getAttrRef(AT_specification);
                                     if (ref_offset > next_offset) return error.InvalidDebugInfo;
-                                    try s.seekable_stream.seekTo(this_unit_offset + ref_offset);
-                                    this_die_obj = (try di.parseDie(&s.stream, abbrev_table, is_64)) orelse return error.InvalidDebugInfo;
+                                    try seekable.seekTo(this_unit_offset + ref_offset);
+                                    this_die_obj = (try di.parseDie(in, abbrev_table, is_64)) orelse return error.InvalidDebugInfo;
                                 } else {
                                     break :x null;
                                 }
@@ -511,7 +510,7 @@ pub const DwarfInfo = struct {
                     else => {},
                 }
 
-                try s.seekable_stream.seekTo(after_die_offset);
+                try seekable.seekTo(after_die_offset);
             }
 
             this_unit_offset += next_offset;
@@ -519,35 +518,37 @@ pub const DwarfInfo = struct {
     }
 
     fn scanAllCompileUnits(di: *DwarfInfo) !void {
-        var s = io.SliceSeekableInStream.init(di.debug_info);
+        var stream = io.fixedBufferStream(di.debug_info);
+        const in = &stream.inStream();
+        const seekable = &stream.seekableStream();
         var this_unit_offset: u64 = 0;
 
-        while (this_unit_offset < try s.seekable_stream.getEndPos()) {
-            s.seekable_stream.seekTo(this_unit_offset) catch |err| switch (err) {
+        while (this_unit_offset < try seekable.getEndPos()) {
+            seekable.seekTo(this_unit_offset) catch |err| switch (err) {
                 error.EndOfStream => unreachable,
                 else => return err,
             };
 
             var is_64: bool = undefined;
-            const unit_length = try readInitialLength(@TypeOf(s.stream.readFn).ReturnType.ErrorSet, &s.stream, &is_64);
+            const unit_length = try readInitialLength(in, &is_64);
             if (unit_length == 0) return;
             const next_offset = unit_length + (if (is_64) @as(usize, 12) else @as(usize, 4));
 
-            const version = try s.stream.readInt(u16, di.endian);
+            const version = try in.readInt(u16, di.endian);
             if (version < 2 or version > 5) return error.InvalidDebugInfo;
 
-            const debug_abbrev_offset = if (is_64) try s.stream.readInt(u64, di.endian) else try s.stream.readInt(u32, di.endian);
+            const debug_abbrev_offset = if (is_64) try in.readInt(u64, di.endian) else try in.readInt(u32, di.endian);
 
-            const address_size = try s.stream.readByte();
+            const address_size = try in.readByte();
             if (address_size != @sizeOf(usize)) return error.InvalidDebugInfo;
 
-            const compile_unit_pos = try s.seekable_stream.getPos();
+            const compile_unit_pos = try seekable.getPos();
             const abbrev_table = try di.getAbbrevTable(debug_abbrev_offset);
 
-            try s.seekable_stream.seekTo(compile_unit_pos);
+            try seekable.seekTo(compile_unit_pos);
 
             const compile_unit_die = try di.allocator().create(Die);
-            compile_unit_die.* = (try di.parseDie(&s.stream, abbrev_table, is_64)) orelse return error.InvalidDebugInfo;
+            compile_unit_die.* = (try di.parseDie(in, abbrev_table, is_64)) orelse return error.InvalidDebugInfo;
 
             if (compile_unit_die.tag_id != TAG_compile_unit) return error.InvalidDebugInfo;
 
@@ -593,7 +594,9 @@ pub const DwarfInfo = struct {
             }
             if (di.debug_ranges) |debug_ranges| {
                 if (compile_unit.die.getAttrSecOffset(AT_ranges)) |ranges_offset| {
-                    var s = io.SliceSeekableInStream.init(debug_ranges);
+                    var stream = io.fixedBufferStream(debug_ranges);
+                    const in = &stream.inStream();
+                    const seekable = &stream.seekableStream();
 
                     // All the addresses in the list are relative to the value
                     // specified by DW_AT_low_pc or to some other value encoded
@@ -604,11 +607,11 @@ pub const DwarfInfo = struct {
                         else => return err,
                     };
 
-                    try s.seekable_stream.seekTo(ranges_offset);
+                    try seekable.seekTo(ranges_offset);
 
                     while (true) {
-                        const begin_addr = try s.stream.readIntLittle(usize);
-                        const end_addr = try s.stream.readIntLittle(usize);
+                        const begin_addr = try in.readIntLittle(usize);
+                        const end_addr = try in.readIntLittle(usize);
                         if (begin_addr == 0 and end_addr == 0) {
                             break;
                         }
@@ -646,25 +649,27 @@ pub const DwarfInfo = struct {
     }
 
     fn parseAbbrevTable(di: *DwarfInfo, offset: u64) !AbbrevTable {
-        var s = io.SliceSeekableInStream.init(di.debug_abbrev);
+        var stream = io.fixedBufferStream(di.debug_abbrev);
+        const in = &stream.inStream();
+        const seekable = &stream.seekableStream();
 
-        try s.seekable_stream.seekTo(offset);
+        try seekable.seekTo(offset);
         var result = AbbrevTable.init(di.allocator());
         errdefer result.deinit();
         while (true) {
-            const abbrev_code = try leb.readULEB128(u64, &s.stream);
+            const abbrev_code = try leb.readULEB128(u64, in);
             if (abbrev_code == 0) return result;
             try result.append(AbbrevTableEntry{
                 .abbrev_code = abbrev_code,
-                .tag_id = try leb.readULEB128(u64, &s.stream),
-                .has_children = (try s.stream.readByte()) == CHILDREN_yes,
+                .tag_id = try leb.readULEB128(u64, in),
+                .has_children = (try in.readByte()) == CHILDREN_yes,
                 .attrs = ArrayList(AbbrevAttr).init(di.allocator()),
             });
             const attrs = &result.items[result.len - 1].attrs;
 
             while (true) {
-                const attr_id = try leb.readULEB128(u64, &s.stream);
-                const form_id = try leb.readULEB128(u64, &s.stream);
+                const attr_id = try leb.readULEB128(u64, in);
+                const form_id = try leb.readULEB128(u64, in);
                 if (attr_id == 0 and form_id == 0) break;
                 try attrs.append(AbbrevAttr{
                     .attr_id = attr_id,
@@ -695,42 +700,44 @@ pub const DwarfInfo = struct {
     }
 
     fn getLineNumberInfo(di: *DwarfInfo, compile_unit: CompileUnit, target_address: usize) !debug.LineInfo {
-        var s = io.SliceSeekableInStream.init(di.debug_line);
+        var stream = io.fixedBufferStream(di.debug_line);
+        const in = &stream.inStream();
+        const seekable = &stream.seekableStream();
 
         const compile_unit_cwd = try compile_unit.die.getAttrString(di, AT_comp_dir);
         const line_info_offset = try compile_unit.die.getAttrSecOffset(AT_stmt_list);
 
-        try s.seekable_stream.seekTo(line_info_offset);
+        try seekable.seekTo(line_info_offset);
 
         var is_64: bool = undefined;
-        const unit_length = try readInitialLength(@TypeOf(s.stream.readFn).ReturnType.ErrorSet, &s.stream, &is_64);
+        const unit_length = try readInitialLength(in, &is_64);
         if (unit_length == 0) {
             return error.MissingDebugInfo;
         }
         const next_offset = unit_length + (if (is_64) @as(usize, 12) else @as(usize, 4));
 
-        const version = try s.stream.readInt(u16, di.endian);
+        const version = try in.readInt(u16, di.endian);
         // TODO support 3 and 5
         if (version != 2 and version != 4) return error.InvalidDebugInfo;
 
-        const prologue_length = if (is_64) try s.stream.readInt(u64, di.endian) else try s.stream.readInt(u32, di.endian);
-        const prog_start_offset = (try s.seekable_stream.getPos()) + prologue_length;
+        const prologue_length = if (is_64) try in.readInt(u64, di.endian) else try in.readInt(u32, di.endian);
+        const prog_start_offset = (try seekable.getPos()) + prologue_length;
 
-        const minimum_instruction_length = try s.stream.readByte();
+        const minimum_instruction_length = try in.readByte();
         if (minimum_instruction_length == 0) return error.InvalidDebugInfo;
 
         if (version >= 4) {
             // maximum_operations_per_instruction
-            _ = try s.stream.readByte();
+            _ = try in.readByte();
         }
 
-        const default_is_stmt = (try s.stream.readByte()) != 0;
-        const line_base = try s.stream.readByteSigned();
+        const default_is_stmt = (try in.readByte()) != 0;
+        const line_base = try in.readByteSigned();
 
-        const line_range = try s.stream.readByte();
+        const line_range = try in.readByte();
         if (line_range == 0) return error.InvalidDebugInfo;
 
-        const opcode_base = try s.stream.readByte();
+        const opcode_base = try in.readByte();
 
         const standard_opcode_lengths = try di.allocator().alloc(u8, opcode_base - 1);
         defer di.allocator().free(standard_opcode_lengths);
@@ -738,14 +745,14 @@ pub const DwarfInfo = struct {
         {
             var i: usize = 0;
             while (i < opcode_base - 1) : (i += 1) {
-                standard_opcode_lengths[i] = try s.stream.readByte();
+                standard_opcode_lengths[i] = try in.readByte();
             }
         }
 
         var include_directories = ArrayList([]const u8).init(di.allocator());
         try include_directories.append(compile_unit_cwd);
         while (true) {
-            const dir = try s.stream.readUntilDelimiterAlloc(di.allocator(), 0, math.maxInt(usize));
+            const dir = try in.readUntilDelimiterAlloc(di.allocator(), 0, math.maxInt(usize));
             if (dir.len == 0) break;
             try include_directories.append(dir);
         }
@@ -754,11 +761,11 @@ pub const DwarfInfo = struct {
         var prog = LineNumberProgram.init(default_is_stmt, include_directories.toSliceConst(), &file_entries, target_address);
 
         while (true) {
-            const file_name = try s.stream.readUntilDelimiterAlloc(di.allocator(), 0, math.maxInt(usize));
+            const file_name = try in.readUntilDelimiterAlloc(di.allocator(), 0, math.maxInt(usize));
             if (file_name.len == 0) break;
-            const dir_index = try leb.readULEB128(usize, &s.stream);
-            const mtime = try leb.readULEB128(usize, &s.stream);
-            const len_bytes = try leb.readULEB128(usize, &s.stream);
+            const dir_index = try leb.readULEB128(usize, in);
+            const mtime = try leb.readULEB128(usize, in);
+            const len_bytes = try leb.readULEB128(usize, in);
             try file_entries.append(FileEntry{
                 .file_name = file_name,
                 .dir_index = dir_index,
@@ -767,17 +774,17 @@ pub const DwarfInfo = struct {
             });
         }
 
-        try s.seekable_stream.seekTo(prog_start_offset);
+        try seekable.seekTo(prog_start_offset);
 
         const next_unit_pos = line_info_offset + next_offset;
 
-        while ((try s.seekable_stream.getPos()) < next_unit_pos) {
-            const opcode = try s.stream.readByte();
+        while ((try seekable.getPos()) < next_unit_pos) {
+            const opcode = try in.readByte();
 
             if (opcode == LNS_extended_op) {
-                const op_size = try leb.readULEB128(u64, &s.stream);
+                const op_size = try leb.readULEB128(u64, in);
                 if (op_size < 1) return error.InvalidDebugInfo;
-                var sub_op = try s.stream.readByte();
+                var sub_op = try in.readByte();
                 switch (sub_op) {
                     LNE_end_sequence => {
                         prog.end_sequence = true;
@@ -785,14 +792,14 @@ pub const DwarfInfo = struct {
                         prog.reset();
                     },
                     LNE_set_address => {
-                        const addr = try s.stream.readInt(usize, di.endian);
+                        const addr = try in.readInt(usize, di.endian);
                         prog.address = addr;
                     },
                     LNE_define_file => {
-                        const file_name = try s.stream.readUntilDelimiterAlloc(di.allocator(), 0, math.maxInt(usize));
-                        const dir_index = try leb.readULEB128(usize, &s.stream);
-                        const mtime = try leb.readULEB128(usize, &s.stream);
-                        const len_bytes = try leb.readULEB128(usize, &s.stream);
+                        const file_name = try in.readUntilDelimiterAlloc(di.allocator(), 0, math.maxInt(usize));
+                        const dir_index = try leb.readULEB128(usize, in);
+                        const mtime = try leb.readULEB128(usize, in);
+                        const len_bytes = try leb.readULEB128(usize, in);
                         try file_entries.append(FileEntry{
                             .file_name = file_name,
                             .dir_index = dir_index,
@@ -802,7 +809,7 @@ pub const DwarfInfo = struct {
                     },
                     else => {
                         const fwd_amt = math.cast(isize, op_size - 1) catch return error.InvalidDebugInfo;
-                        try s.seekable_stream.seekBy(fwd_amt);
+                        try seekable.seekBy(fwd_amt);
                     },
                 }
             } else if (opcode >= opcode_base) {
@@ -821,19 +828,19 @@ pub const DwarfInfo = struct {
                         prog.basic_block = false;
                     },
                     LNS_advance_pc => {
-                        const arg = try leb.readULEB128(usize, &s.stream);
+                        const arg = try leb.readULEB128(usize, in);
                         prog.address += arg * minimum_instruction_length;
                     },
                     LNS_advance_line => {
-                        const arg = try leb.readILEB128(i64, &s.stream);
+                        const arg = try leb.readILEB128(i64, in);
                         prog.line += arg;
                     },
                     LNS_set_file => {
-                        const arg = try leb.readULEB128(usize, &s.stream);
+                        const arg = try leb.readULEB128(usize, in);
                         prog.file = arg;
                     },
                     LNS_set_column => {
-                        const arg = try leb.readULEB128(u64, &s.stream);
+                        const arg = try leb.readULEB128(u64, in);
                         prog.column = arg;
                     },
                     LNS_negate_stmt => {
@@ -847,14 +854,14 @@ pub const DwarfInfo = struct {
                         prog.address += inc_addr;
                     },
                     LNS_fixed_advance_pc => {
-                        const arg = try s.stream.readInt(u16, di.endian);
+                        const arg = try in.readInt(u16, di.endian);
                         prog.address += arg;
                     },
                     LNS_set_prologue_end => {},
                     else => {
                         if (opcode - 1 >= standard_opcode_lengths.len) return error.InvalidDebugInfo;
                         const len_bytes = standard_opcode_lengths[opcode - 1];
-                        try s.seekable_stream.seekBy(len_bytes);
+                        try seekable.seekBy(len_bytes);
                     },
                 }
             }
diff --git a/lib/std/elf.zig b/lib/std/elf.zig
index fc57db7c98..7b415f675a 100644
--- a/lib/std/elf.zig
+++ b/lib/std/elf.zig
@@ -1,5 +1,5 @@
-const builtin = @import("builtin");
 const std = @import("std.zig");
+const builtin = std.builtin;
 const io = std.io;
 const os = std.os;
 const math = std.math;
@@ -330,219 +330,233 @@ pub const ET = extern enum(u16) {
     pub const HIPROC = 0xffff;
 };
 
-pub const SectionHeader = Elf64_Shdr;
-pub const ProgramHeader = Elf64_Phdr;
-
-pub const Elf = struct {
-    seekable_stream: *io.SeekableStream(anyerror, anyerror),
-    in_stream: *io.InStream(anyerror),
-    is_64: bool,
+/// All integers are native endian.
+const Header = struct {
     endian: builtin.Endian,
-    file_type: ET,
-    arch: EM,
-    entry_addr: u64,
-    program_header_offset: u64,
-    section_header_offset: u64,
-    string_section_index: usize,
-    string_section: *SectionHeader,
-    section_headers: []SectionHeader,
-    program_headers: []ProgramHeader,
-    allocator: *mem.Allocator,
-
-    pub fn openStream(
-        allocator: *mem.Allocator,
-        seekable_stream: *io.SeekableStream(anyerror, anyerror),
-        in: *io.InStream(anyerror),
-    ) !Elf {
-        var elf: Elf = undefined;
-        elf.allocator = allocator;
-        elf.seekable_stream = seekable_stream;
-        elf.in_stream = in;
-
-        var magic: [4]u8 = undefined;
-        try in.readNoEof(magic[0..]);
-        if (!mem.eql(u8, &magic, "\x7fELF")) return error.InvalidFormat;
-
-        elf.is_64 = switch (try in.readByte()) {
-            1 => false,
-            2 => true,
-            else => return error.InvalidFormat,
-        };
-
-        elf.endian = switch (try in.readByte()) {
-            1 => .Little,
-            2 => .Big,
-            else => return error.InvalidFormat,
-        };
-
-        const version_byte = try in.readByte();
-        if (version_byte != 1) return error.InvalidFormat;
-
-        // skip over padding
-        try seekable_stream.seekBy(9);
-
-        elf.file_type = try in.readEnum(ET, elf.endian);
-        elf.arch = try in.readEnum(EM, elf.endian);
-
-        const elf_version = try in.readInt(u32, elf.endian);
-        if (elf_version != 1) return error.InvalidFormat;
-
-        if (elf.is_64) {
-            elf.entry_addr = try in.readInt(u64, elf.endian);
-            elf.program_header_offset = try in.readInt(u64, elf.endian);
-            elf.section_header_offset = try in.readInt(u64, elf.endian);
-        } else {
-            elf.entry_addr = @as(u64, try in.readInt(u32, elf.endian));
-            elf.program_header_offset = @as(u64, try in.readInt(u32, elf.endian));
-            elf.section_header_offset = @as(u64, try in.readInt(u32, elf.endian));
-        }
-
-        // skip over flags
-        try seekable_stream.seekBy(4);
-
-        const header_size = try in.readInt(u16, elf.endian);
-        if ((elf.is_64 and header_size != @sizeOf(Elf64_Ehdr)) or (!elf.is_64 and header_size != @sizeOf(Elf32_Ehdr))) {
-            return error.InvalidFormat;
-        }
-
-        const ph_entry_size = try in.readInt(u16, elf.endian);
-        const ph_entry_count = try in.readInt(u16, elf.endian);
-
-        if ((elf.is_64 and ph_entry_size != @sizeOf(Elf64_Phdr)) or (!elf.is_64 and ph_entry_size != @sizeOf(Elf32_Phdr))) {
-            return error.InvalidFormat;
-        }
-
-        const sh_entry_size = try in.readInt(u16, elf.endian);
-        const sh_entry_count = try in.readInt(u16, elf.endian);
-
-        if ((elf.is_64 and sh_entry_size != @sizeOf(Elf64_Shdr)) or (!elf.is_64 and sh_entry_size != @sizeOf(Elf32_Shdr))) {
-            return error.InvalidFormat;
-        }
-
-        elf.string_section_index = @as(usize, try in.readInt(u16, elf.endian));
-
-        if (elf.string_section_index >= sh_entry_count) return error.InvalidFormat;
-
-        const sh_byte_count = @as(u64, sh_entry_size) * @as(u64, sh_entry_count);
-        const end_sh = try math.add(u64, elf.section_header_offset, sh_byte_count);
-        const ph_byte_count = @as(u64, ph_entry_size) * @as(u64, ph_entry_count);
-        const end_ph = try math.add(u64, elf.program_header_offset, ph_byte_count);
-
-        const stream_end = try seekable_stream.getEndPos();
-        if (stream_end < end_sh or stream_end < end_ph) {
-            return error.InvalidFormat;
-        }
-
-        try seekable_stream.seekTo(elf.program_header_offset);
-
-        elf.program_headers = try elf.allocator.alloc(ProgramHeader, ph_entry_count);
-        errdefer elf.allocator.free(elf.program_headers);
-
-        if (elf.is_64) {
-            for (elf.program_headers) |*elf_program| {
-                elf_program.p_type = try in.readInt(Elf64_Word, elf.endian);
-                elf_program.p_flags = try in.readInt(Elf64_Word, elf.endian);
-                elf_program.p_offset = try in.readInt(Elf64_Off, elf.endian);
-                elf_program.p_vaddr = try in.readInt(Elf64_Addr, elf.endian);
-                elf_program.p_paddr = try in.readInt(Elf64_Addr, elf.endian);
-                elf_program.p_filesz = try in.readInt(Elf64_Xword, elf.endian);
-                elf_program.p_memsz = try in.readInt(Elf64_Xword, elf.endian);
-                elf_program.p_align = try in.readInt(Elf64_Xword, elf.endian);
-            }
-        } else {
-            for (elf.program_headers) |*elf_program| {
-                elf_program.p_type = @as(Elf64_Word, try in.readInt(Elf32_Word, elf.endian));
-                elf_program.p_offset = @as(Elf64_Off, try in.readInt(Elf32_Off, elf.endian));
-                elf_program.p_vaddr = @as(Elf64_Addr, try in.readInt(Elf32_Addr, elf.endian));
-                elf_program.p_paddr = @as(Elf64_Addr, try in.readInt(Elf32_Addr, elf.endian));
-                elf_program.p_filesz = @as(Elf64_Word, try in.readInt(Elf32_Word, elf.endian));
-                elf_program.p_memsz = @as(Elf64_Word, try in.readInt(Elf32_Word, elf.endian));
-                elf_program.p_flags = @as(Elf64_Word, try in.readInt(Elf32_Word, elf.endian));
-                elf_program.p_align = @as(Elf64_Word, try in.readInt(Elf32_Word, elf.endian));
-            }
-        }
-
-        try seekable_stream.seekTo(elf.section_header_offset);
-
-        elf.section_headers = try elf.allocator.alloc(SectionHeader, sh_entry_count);
-        errdefer elf.allocator.free(elf.section_headers);
-
-        if (elf.is_64) {
-            for (elf.section_headers) |*elf_section| {
-                elf_section.sh_name = try in.readInt(u32, elf.endian);
-                elf_section.sh_type = try in.readInt(u32, elf.endian);
-                elf_section.sh_flags = try in.readInt(u64, elf.endian);
-                elf_section.sh_addr = try in.readInt(u64, elf.endian);
-                elf_section.sh_offset = try in.readInt(u64, elf.endian);
-                elf_section.sh_size = try in.readInt(u64, elf.endian);
-                elf_section.sh_link = try in.readInt(u32, elf.endian);
-                elf_section.sh_info = try in.readInt(u32, elf.endian);
-                elf_section.sh_addralign = try in.readInt(u64, elf.endian);
-                elf_section.sh_entsize = try in.readInt(u64, elf.endian);
-            }
-        } else {
-            for (elf.section_headers) |*elf_section| {
-                // TODO (multiple occurrences) allow implicit cast from %u32 -> %u64 ?
-                elf_section.sh_name = try in.readInt(u32, elf.endian);
-                elf_section.sh_type = try in.readInt(u32, elf.endian);
-                elf_section.sh_flags = @as(u64, try in.readInt(u32, elf.endian));
-                elf_section.sh_addr = @as(u64, try in.readInt(u32, elf.endian));
-                elf_section.sh_offset = @as(u64, try in.readInt(u32, elf.endian));
-                elf_section.sh_size = @as(u64, try in.readInt(u32, elf.endian));
-                elf_section.sh_link = try in.readInt(u32, elf.endian);
-                elf_section.sh_info = try in.readInt(u32, elf.endian);
-                elf_section.sh_addralign = @as(u64, try in.readInt(u32, elf.endian));
-                elf_section.sh_entsize = @as(u64, try in.readInt(u32, elf.endian));
-            }
-        }
-
-        for (elf.section_headers) |*elf_section| {
-            if (elf_section.sh_type != SHT_NOBITS) {
-                const file_end_offset = try math.add(u64, elf_section.sh_offset, elf_section.sh_size);
-                if (stream_end < file_end_offset) return error.InvalidFormat;
-            }
-        }
-
-        elf.string_section = &elf.section_headers[elf.string_section_index];
-        if (elf.string_section.sh_type != SHT_STRTAB) {
-            // not a string table
-            return error.InvalidFormat;
-        }
-
-        return elf;
-    }
-
-    pub fn close(elf: *Elf) void {
-        elf.allocator.free(elf.section_headers);
-        elf.allocator.free(elf.program_headers);
-    }
-
-    pub fn findSection(elf: *Elf, name: []const u8) !?*SectionHeader {
-        section_loop: for (elf.section_headers) |*elf_section| {
-            if (elf_section.sh_type == SHT_NULL) continue;
-
-            const name_offset = elf.string_section.sh_offset + elf_section.sh_name;
-            try elf.seekable_stream.seekTo(name_offset);
-
-            for (name) |expected_c| {
-                const target_c = try elf.in_stream.readByte();
-                if (target_c == 0 or expected_c != target_c) continue :section_loop;
-            }
-
-            {
-                const null_byte = try elf.in_stream.readByte();
-                if (null_byte == 0) return elf_section;
-            }
-        }
-
-        return null;
-    }
-
-    pub fn seekToSection(elf: *Elf, elf_section: *SectionHeader) !void {
-        try elf.seekable_stream.seekTo(elf_section.sh_offset);
-    }
+    is_64: bool,
+    entry: u64,
+    phoff: u64,
+    shoff: u64,
+    phentsize: u16,
+    phnum: u16,
+    shentsize: u16,
+    shnum: u16,
+    shstrndx: u16,
 };
 
+pub fn readHeader(file: File) !Header {
+    var hdr_buf: [@sizeOf(Elf64_Ehdr)]u8 align(@alignOf(Elf64_Ehdr)) = undefined;
+    try preadNoEof(file, &hdr_buf, 0);
+    const hdr32 = @ptrCast(*Elf32_Ehdr, &hdr_buf);
+    const hdr64 = @ptrCast(*Elf64_Ehdr, &hdr_buf);
+    if (!mem.eql(u8, hdr32.e_ident[0..4], "\x7fELF")) return error.InvalidElfMagic;
+    if (hdr32.e_ident[EI_VERSION] != 1) return error.InvalidElfVersion;
+
+    const endian: std.builtin.Endian = switch (hdr32.e_ident[EI_DATA]) {
+        ELFDATA2LSB => .Little,
+        ELFDATA2MSB => .Big,
+        else => return error.InvalidElfEndian,
+    };
+    const need_bswap = endian != std.builtin.endian;
+
+    const is_64 = switch (hdr32.e_ident[EI_CLASS]) {
+        ELFCLASS32 => false,
+        ELFCLASS64 => true,
+        else => return error.InvalidElfClass,
+    };
+
+    return @as(Header, .{
+        .endian = endian,
+        .is_64 = is_64,
+        .entry = int(is_64, need_bswap, hdr32.e_entry, hdr64.e_entry),
+        .phoff = int(is_64, need_bswap, hdr32.e_phoff, hdr64.e_phoff),
+        .shoff = int(is_64, need_bswap, hdr32.e_shoff, hdr64.e_shoff),
+        .phentsize = int(is_64, need_bswap, hdr32.e_phentsize, hdr64.e_phentsize),
+        .phnum = int(is_64, need_bswap, hdr32.e_phnum, hdr64.e_phnum),
+        .shentsize = int(is_64, need_bswap, hdr32.e_shentsize, hdr64.e_shentsize),
+        .shnum = int(is_64, need_bswap, hdr32.e_shnum, hdr64.e_shnum),
+        .shstrndx = int(is_64, need_bswap, hdr32.e_shstrndx, hdr64.e_shstrndx),
+    });
+}
+
+/// All integers are native endian.
+pub const AllHeaders = struct {
+    header: Header,
+    section_headers: []Elf64_Shdr,
+    program_headers: []Elf64_Phdr,
+    allocator: *mem.Allocator,
+};
+
+pub fn readAllHeaders(allocator: *mem.Allocator, file: File) !AllHeaders {
+    var hdrs: AllHeaders = .{
+        .allocator = allocator,
+        .header = try readHeader(file),
+        .section_headers = undefined,
+        .program_headers = undefined,
+    };
+    const is_64 = hdrs.header.is_64;
+    const need_bswap = hdrs.header.endian != std.builtin.endian;
+
+    hdrs.section_headers = try allocator.alloc(Elf64_Shdr, hdrs.header.shnum);
+    errdefer allocator.free(hdrs.section_headers);
+
+    hdrs.program_headers = try allocator.alloc(Elf64_Phdr, hdrs.header.phnum);
+    errdefer allocator.free(hdrs.program_headers);
+
+    // If the ELF file is 64-bit and same-endianness, then all we have to do is
+    // yeet the bytes into memory.
+    // If only the endianness is different, they can be simply byte swapped.
+    if (is_64) {
+        const shdr_buf = std.mem.sliceAsBytes(hdrs.section_headers);
+        const phdr_buf = std.mem.sliceAsBytes(hdrs.program_headers);
+        try preadNoEof(file, shdr_buf, hdrs.header.shoff);
+        try preadNoEof(file, phdr_buf, hdrs.header.phoff);
+
+        if (need_bswap) {
+            for (hdrs.section_headers) |*shdr| {
+                shdr.* = .{
+                    .sh_name = @byteSwap(@TypeOf(shdr.sh_name), shdr.sh_name),
+                    .sh_type = @byteSwap(@TypeOf(shdr.sh_type), shdr.sh_type),
+                    .sh_flags = @byteSwap(@TypeOf(shdr.sh_flags), shdr.sh_flags),
+                    .sh_addr = @byteSwap(@TypeOf(shdr.sh_addr), shdr.sh_addr),
+                    .sh_offset = @byteSwap(@TypeOf(shdr.sh_offset), shdr.sh_offset),
+                    .sh_size = @byteSwap(@TypeOf(shdr.sh_size), shdr.sh_size),
+                    .sh_link = @byteSwap(@TypeOf(shdr.sh_link), shdr.sh_link),
+                    .sh_info = @byteSwap(@TypeOf(shdr.sh_info), shdr.sh_info),
+                    .sh_addralign = @byteSwap(@TypeOf(shdr.sh_addralign), shdr.sh_addralign),
+                    .sh_entsize = @byteSwap(@TypeOf(shdr.sh_entsize), shdr.sh_entsize),
+                };
+            }
+            for (hdrs.program_headers) |*phdr| {
+                phdr.* = .{
+                    .p_type = @byteSwap(@TypeOf(phdr.p_type), phdr.p_type),
+                    .p_offset = @byteSwap(@TypeOf(phdr.p_offset), phdr.p_offset),
+                    .p_vaddr = @byteSwap(@TypeOf(phdr.p_vaddr), phdr.p_vaddr),
+                    .p_paddr = @byteSwap(@TypeOf(phdr.p_paddr), phdr.p_paddr),
+                    .p_filesz = @byteSwap(@TypeOf(phdr.p_filesz), phdr.p_filesz),
+                    .p_memsz = @byteSwap(@TypeOf(phdr.p_memsz), phdr.p_memsz),
+                    .p_flags = @byteSwap(@TypeOf(phdr.p_flags), phdr.p_flags),
+                    .p_align = @byteSwap(@TypeOf(phdr.p_align), phdr.p_align),
+                };
+            }
+        }
+
+        return hdrs;
+    }
+
+    const shdrs_32 = try allocator.alloc(Elf32_Shdr, hdrs.header.shnum);
+    defer allocator.free(shdrs_32);
+
+    const phdrs_32 = try allocator.alloc(Elf32_Phdr, hdrs.header.phnum);
+    defer allocator.free(phdrs_32);
+
+    const shdr_buf = std.mem.sliceAsBytes(shdrs_32);
+    const phdr_buf = std.mem.sliceAsBytes(phdrs_32);
+    try preadNoEof(file, shdr_buf, hdrs.header.shoff);
+    try preadNoEof(file, phdr_buf, hdrs.header.phoff);
+
+    if (need_bswap) {
+        for (hdrs.section_headers) |*shdr, i| {
+            const o = shdrs_32[i];
+            shdr.* = .{
+                .sh_name = @byteSwap(@TypeOf(o.sh_name), o.sh_name),
+                .sh_type = @byteSwap(@TypeOf(o.sh_type), o.sh_type),
+                .sh_flags = @byteSwap(@TypeOf(o.sh_flags), o.sh_flags),
+                .sh_addr = @byteSwap(@TypeOf(o.sh_addr), o.sh_addr),
+                .sh_offset = @byteSwap(@TypeOf(o.sh_offset), o.sh_offset),
+                .sh_size = @byteSwap(@TypeOf(o.sh_size), o.sh_size),
+                .sh_link = @byteSwap(@TypeOf(o.sh_link), o.sh_link),
+                .sh_info = @byteSwap(@TypeOf(o.sh_info), o.sh_info),
+                .sh_addralign = @byteSwap(@TypeOf(o.sh_addralign), o.sh_addralign),
+                .sh_entsize = @byteSwap(@TypeOf(o.sh_entsize), o.sh_entsize),
+            };
+        }
+        for (hdrs.program_headers) |*phdr, i| {
+            const o = phdrs_32[i];
+            phdr.* = .{
+                .p_type = @byteSwap(@TypeOf(o.p_type), o.p_type),
+                .p_offset = @byteSwap(@TypeOf(o.p_offset), o.p_offset),
+                .p_vaddr = @byteSwap(@TypeOf(o.p_vaddr), o.p_vaddr),
+                .p_paddr = @byteSwap(@TypeOf(o.p_paddr), o.p_paddr),
+                .p_filesz = @byteSwap(@TypeOf(o.p_filesz), o.p_filesz),
+                .p_memsz = @byteSwap(@TypeOf(o.p_memsz), o.p_memsz),
+                .p_flags = @byteSwap(@TypeOf(o.p_flags), o.p_flags),
+                .p_align = @byteSwap(@TypeOf(o.p_align), o.p_align),
+            };
+        }
+    } else {
+        for (hdrs.section_headers) |*shdr, i| {
+            const o = shdrs_32[i];
+            shdr.* = .{
+                .sh_name = o.sh_name,
+                .sh_type = o.sh_type,
+                .sh_flags = o.sh_flags,
+                .sh_addr = o.sh_addr,
+                .sh_offset = o.sh_offset,
+                .sh_size = o.sh_size,
+                .sh_link = o.sh_link,
+                .sh_info = o.sh_info,
+                .sh_addralign = o.sh_addralign,
+                .sh_entsize = o.sh_entsize,
+            };
+        }
+        for (hdrs.program_headers) |*phdr, i| {
+            const o = phdrs_32[i];
+            phdr.* = .{
+                .p_type = o.p_type,
+                .p_offset = o.p_offset,
+                .p_vaddr = o.p_vaddr,
+                .p_paddr = o.p_paddr,
+                .p_filesz = o.p_filesz,
+                .p_memsz = o.p_memsz,
+                .p_flags = o.p_flags,
+                .p_align = o.p_align,
+            };
+        }
+    }
+
+    return hdrs;
+}
+
+pub fn int(is_64: bool, need_bswap: bool, int_32: var, int_64: var) @TypeOf(int_64) {
+    if (is_64) {
+        if (need_bswap) {
+            return @byteSwap(@TypeOf(int_64), int_64);
+        } else {
+            return int_64;
+        }
+    } else {
+        return int32(need_bswap, int_32, @TypeOf(int_64));
+    }
+}
+
+pub fn int32(need_bswap: bool, int_32: var, comptime Int64: var) Int64 {
+    if (need_bswap) {
+        return @byteSwap(@TypeOf(int_32), int_32);
+    } else {
+        return int_32;
+    }
+}
+
+fn preadNoEof(file: std.fs.File, buf: []u8, offset: u64) !void {
+    var i: u64 = 0;
+    while (i < buf.len) {
+        const len = file.pread(buf[i .. buf.len - i], offset + i) catch |err| switch (err) {
+            error.SystemResources => return error.SystemResources,
+            error.IsDir => return error.UnableToReadElfFile,
+            error.OperationAborted => return error.UnableToReadElfFile,
+            error.BrokenPipe => return error.UnableToReadElfFile,
+            error.Unseekable => return error.UnableToReadElfFile,
+            error.ConnectionResetByPeer => return error.UnableToReadElfFile,
+            error.InputOutput => return error.FileSystem,
+            error.Unexpected => return error.Unexpected,
+            error.WouldBlock => return error.Unexpected,
+        };
+        if (len == 0) return error.UnexpectedEndOfFile;
+        i += len;
+    }
+}
+
 pub const EI_NIDENT = 16;
 
 pub const EI_CLASS = 4;
diff --git a/lib/std/event/channel.zig b/lib/std/event/channel.zig
index 3c5b48d047..83c77bcac5 100644
--- a/lib/std/event/channel.zig
+++ b/lib/std/event/channel.zig
@@ -14,8 +14,8 @@ pub fn Channel(comptime T: type) type {
         putters: std.atomic.Queue(PutNode),
         get_count: usize,
         put_count: usize,
-        dispatch_lock: u8, // TODO make this a bool
-        need_dispatch: u8, // TODO make this a bool
+        dispatch_lock: bool,
+        need_dispatch: bool,
 
         // simple fixed size ring buffer
         buffer_nodes: []T,
@@ -62,8 +62,8 @@ pub fn Channel(comptime T: type) type {
                 .buffer_len = 0,
                 .buffer_nodes = buffer,
                 .buffer_index = 0,
-                .dispatch_lock = 0,
-                .need_dispatch = 0,
+                .dispatch_lock = false,
+                .need_dispatch = false,
                 .getters = std.atomic.Queue(GetNode).init(),
                 .putters = std.atomic.Queue(PutNode).init(),
                 .or_null_queue = std.atomic.Queue(*std.atomic.Queue(GetNode).Node).init(),
@@ -165,15 +165,14 @@ pub fn Channel(comptime T: type) type {
 
         fn dispatch(self: *SelfChannel) void {
             // set the "need dispatch" flag
-            @atomicStore(u8, &self.need_dispatch, 1, .SeqCst);
+            @atomicStore(bool, &self.need_dispatch, true, .SeqCst);
 
             lock: while (true) {
                 // set the lock flag
-                const prev_lock = @atomicRmw(u8, &self.dispatch_lock, .Xchg, 1, .SeqCst);
-                if (prev_lock != 0) return;
+                if (@atomicRmw(bool, &self.dispatch_lock, .Xchg, true, .SeqCst)) return;
 
                 // clear the need_dispatch flag since we're about to do it
-                @atomicStore(u8, &self.need_dispatch, 0, .SeqCst);
+                @atomicStore(bool, &self.need_dispatch, false, .SeqCst);
 
                 while (true) {
                     one_dispatch: {
@@ -250,14 +249,12 @@ pub fn Channel(comptime T: type) type {
                     }
 
                     // clear need-dispatch flag
-                    const need_dispatch = @atomicRmw(u8, &self.need_dispatch, .Xchg, 0, .SeqCst);
-                    if (need_dispatch != 0) continue;
+                    if (@atomicRmw(bool, &self.need_dispatch, .Xchg, false, .SeqCst)) continue;
 
-                    const my_lock = @atomicRmw(u8, &self.dispatch_lock, .Xchg, 0, .SeqCst);
-                    assert(my_lock != 0);
+                    assert(@atomicRmw(bool, &self.dispatch_lock, .Xchg, false, .SeqCst));
 
                     // we have to check again now that we unlocked
-                    if (@atomicLoad(u8, &self.need_dispatch, .SeqCst) != 0) continue :lock;
+                    if (@atomicLoad(bool, &self.need_dispatch, .SeqCst)) continue :lock;
 
                     return;
                 }
diff --git a/lib/std/event/group.zig b/lib/std/event/group.zig
index ac1bf68245..5eebb7ffbc 100644
--- a/lib/std/event/group.zig
+++ b/lib/std/event/group.zig
@@ -120,9 +120,11 @@ test "std.event.Group" {
     // https://github.com/ziglang/zig/issues/1908
     if (builtin.single_threaded) return error.SkipZigTest;
 
-    // TODO provide a way to run tests in evented I/O mode
     if (!std.io.is_async) return error.SkipZigTest;
 
+    // TODO this file has bit-rotted. repair it
+    if (true) return error.SkipZigTest;
+
     const handle = async testGroup(std.heap.page_allocator);
 }
 
diff --git a/lib/std/event/lock.zig b/lib/std/event/lock.zig
index b9cbb5d95f..ff1f738c5e 100644
--- a/lib/std/event/lock.zig
+++ b/lib/std/event/lock.zig
@@ -11,9 +11,9 @@ const Loop = std.event.Loop;
 /// Allows only one actor to hold the lock.
 /// TODO: make this API also work in blocking I/O mode.
 pub const Lock = struct {
-    shared_bit: u8, // TODO make this a bool
+    shared: bool,
     queue: Queue,
-    queue_empty_bit: u8, // TODO make this a bool
+    queue_empty: bool,
 
     const Queue = std.atomic.Queue(anyframe);
 
@@ -31,20 +31,19 @@ pub const Lock = struct {
             }
 
             // We need to release the lock.
-            @atomicStore(u8, &self.lock.queue_empty_bit, 1, .SeqCst);
-            @atomicStore(u8, &self.lock.shared_bit, 0, .SeqCst);
+            @atomicStore(bool, &self.lock.queue_empty, true, .SeqCst);
+            @atomicStore(bool, &self.lock.shared, false, .SeqCst);
 
             // There might be a queue item. If we know the queue is empty, we can be done,
             // because the other actor will try to obtain the lock.
             // But if there's a queue item, we are the actor which must loop and attempt
             // to grab the lock again.
-            if (@atomicLoad(u8, &self.lock.queue_empty_bit, .SeqCst) == 1) {
+            if (@atomicLoad(bool, &self.lock.queue_empty, .SeqCst)) {
                 return;
             }
 
             while (true) {
-                const old_bit = @atomicRmw(u8, &self.lock.shared_bit, .Xchg, 1, .SeqCst);
-                if (old_bit != 0) {
+                if (@atomicRmw(bool, &self.lock.shared, .Xchg, true, .SeqCst)) {
                     // We did not obtain the lock. Great, the queue is someone else's problem.
                     return;
                 }
@@ -56,11 +55,11 @@ pub const Lock = struct {
                 }
 
                 // Release the lock again.
-                @atomicStore(u8, &self.lock.queue_empty_bit, 1, .SeqCst);
-                @atomicStore(u8, &self.lock.shared_bit, 0, .SeqCst);
+                @atomicStore(bool, &self.lock.queue_empty, true, .SeqCst);
+                @atomicStore(bool, &self.lock.shared, false, .SeqCst);
 
                 // Find out if we can be done.
-                if (@atomicLoad(u8, &self.lock.queue_empty_bit, .SeqCst) == 1) {
+                if (@atomicLoad(bool, &self.lock.queue_empty, .SeqCst)) {
                     return;
                 }
             }
@@ -69,24 +68,24 @@ pub const Lock = struct {
 
     pub fn init() Lock {
         return Lock{
-            .shared_bit = 0,
+            .shared = false,
             .queue = Queue.init(),
-            .queue_empty_bit = 1,
+            .queue_empty = true,
         };
     }
 
     pub fn initLocked() Lock {
         return Lock{
-            .shared_bit = 1,
+            .shared = true,
             .queue = Queue.init(),
-            .queue_empty_bit = 1,
+            .queue_empty = true,
         };
     }
 
     /// Must be called when not locked. Not thread safe.
     /// All calls to acquire() and release() must complete before calling deinit().
     pub fn deinit(self: *Lock) void {
-        assert(self.shared_bit == 0);
+        assert(!self.shared);
         while (self.queue.get()) |node| resume node.data;
     }
 
@@ -99,12 +98,11 @@ pub const Lock = struct {
 
             // At this point, we are in the queue, so we might have already been resumed.
 
-            // We set this bit so that later we can rely on the fact, that if queue_empty_bit is 1, some actor
+            // We set this bit so that later we can rely on the fact, that if queue_empty == true, some actor
             // will attempt to grab the lock.
-            @atomicStore(u8, &self.queue_empty_bit, 0, .SeqCst);
+            @atomicStore(bool, &self.queue_empty, false, .SeqCst);
 
-            const old_bit = @atomicRmw(u8, &self.shared_bit, .Xchg, 1, .SeqCst);
-            if (old_bit == 0) {
+            if (!@atomicRmw(bool, &self.shared, .Xchg, true, .SeqCst)) {
                 if (self.queue.get()) |node| {
                     // Whether this node is us or someone else, we tail resume it.
                     resume node.data;
@@ -125,6 +123,9 @@ test "std.event.Lock" {
     // TODO https://github.com/ziglang/zig/issues/3251
     if (builtin.os.tag == .freebsd) return error.SkipZigTest;
 
+    // TODO this file has bit-rotted. repair it
+    if (true) return error.SkipZigTest;
+
     var lock = Lock.init();
     defer lock.deinit();
 
diff --git a/lib/std/event/loop.zig b/lib/std/event/loop.zig
index e62f15d59a..7db6fe98de 100644
--- a/lib/std/event/loop.zig
+++ b/lib/std/event/loop.zig
@@ -809,6 +809,28 @@ pub const Loop = struct {
         return req_node.data.msg.readv.result;
     }
 
+    /// Performs an async `os.pread` using a separate thread.
+    /// `fd` must block and not return EAGAIN.
+    pub fn pread(self: *Loop, fd: os.fd_t, buf: []u8, offset: u64) os.PReadError!usize {
+        var req_node = Request.Node{
+            .data = .{
+                .msg = .{
+                    .pread = .{
+                        .fd = fd,
+                        .buf = buf,
+                        .offset = offset,
+                        .result = undefined,
+                    },
+                },
+                .finish = .{ .TickNode = .{ .data = @frame() } },
+            },
+        };
+        suspend {
+            self.posixFsRequest(&req_node);
+        }
+        return req_node.data.msg.pread.result;
+    }
+
     /// Performs an async `os.preadv` using a separate thread.
     /// `fd` must block and not return EAGAIN.
     pub fn preadv(self: *Loop, fd: os.fd_t, iov: []const os.iovec, offset: u64) os.ReadError!usize {
@@ -895,6 +917,35 @@ pub const Loop = struct {
         return req_node.data.msg.pwritev.result;
     }
 
+    /// Performs an async `os.faccessatZ` using a separate thread.
+    /// `fd` must block and not return EAGAIN.
+    pub fn faccessatZ(
+        self: *Loop,
+        dirfd: os.fd_t,
+        path_z: [*:0]const u8,
+        mode: u32,
+        flags: u32,
+    ) os.AccessError!void {
+        var req_node = Request.Node{
+            .data = .{
+                .msg = .{
+                    .faccessat = .{
+                        .dirfd = dirfd,
+                        .path = path_z,
+                        .mode = mode,
+                        .flags = flags,
+                        .result = undefined,
+                    },
+                },
+                .finish = .{ .TickNode = .{ .data = @frame() } },
+            },
+        };
+        suspend {
+            self.posixFsRequest(&req_node);
+        }
+        return req_node.data.msg.faccessat.result;
+    }
+
     fn workerRun(self: *Loop) void {
         while (true) {
             while (true) {
@@ -1038,6 +1089,9 @@ pub const Loop = struct {
                     .pwritev => |*msg| {
                         msg.result = noasync os.pwritev(msg.fd, msg.iov, msg.offset);
                     },
+                    .pread => |*msg| {
+                        msg.result = noasync os.pread(msg.fd, msg.buf, msg.offset);
+                    },
                     .preadv => |*msg| {
                         msg.result = noasync os.preadv(msg.fd, msg.iov, msg.offset);
                     },
@@ -1047,6 +1101,9 @@ pub const Loop = struct {
                     .openat => |*msg| {
                         msg.result = noasync os.openatC(msg.fd, msg.path, msg.flags, msg.mode);
                     },
+                    .faccessat => |*msg| {
+                        msg.result = noasync os.faccessatZ(msg.dirfd, msg.path, msg.mode, msg.flags);
+                    },
                     .close => |*msg| noasync os.close(msg.fd),
                 }
                 switch (node.data.finish) {
@@ -1120,10 +1177,12 @@ pub const Loop = struct {
             write: Write,
             writev: WriteV,
             pwritev: PWriteV,
+            pread: PRead,
             preadv: PReadV,
             open: Open,
             openat: OpenAt,
             close: Close,
+            faccessat: FAccessAt,
 
             /// special - means the fs thread should exit
             end,
@@ -1161,6 +1220,15 @@ pub const Loop = struct {
                 pub const Error = os.PWriteError;
             };
 
+            pub const PRead = struct {
+                fd: os.fd_t,
+                buf: []u8,
+                offset: usize,
+                result: Error!usize,
+
+                pub const Error = os.PReadError;
+            };
+
             pub const PReadV = struct {
                 fd: os.fd_t,
                 iov: []const os.iovec,
@@ -1192,6 +1260,16 @@ pub const Loop = struct {
             pub const Close = struct {
                 fd: os.fd_t,
             };
+
+            pub const FAccessAt = struct {
+                dirfd: os.fd_t,
+                path: [*:0]const u8,
+                mode: u32,
+                flags: u32,
+                result: Error!void,
+
+                pub const Error = os.AccessError;
+            };
         };
     };
 };
diff --git a/lib/std/event/rwlock.zig b/lib/std/event/rwlock.zig
index f4b13d008b..425088063f 100644
--- a/lib/std/event/rwlock.zig
+++ b/lib/std/event/rwlock.zig
@@ -16,8 +16,8 @@ pub const RwLock = struct {
     shared_state: State,
     writer_queue: Queue,
     reader_queue: Queue,
-    writer_queue_empty_bit: u8, // TODO make this a bool
-    reader_queue_empty_bit: u8, // TODO make this a bool
+    writer_queue_empty: bool,
+    reader_queue_empty: bool,
     reader_lock_count: usize,
 
     const State = enum(u8) {
@@ -40,7 +40,7 @@ pub const RwLock = struct {
                 return;
             }
 
-            @atomicStore(u8, &self.lock.reader_queue_empty_bit, 1, .SeqCst);
+            @atomicStore(bool, &self.lock.reader_queue_empty, true, .SeqCst);
             if (@cmpxchgStrong(State, &self.lock.shared_state, .ReadLock, .Unlocked, .SeqCst, .SeqCst) != null) {
                 // Didn't unlock. Someone else's problem.
                 return;
@@ -62,7 +62,7 @@ pub const RwLock = struct {
             }
 
             // We need to release the write lock. Check if any readers are waiting to grab the lock.
-            if (@atomicLoad(u8, &self.lock.reader_queue_empty_bit, .SeqCst) == 0) {
+            if (!@atomicLoad(bool, &self.lock.reader_queue_empty, .SeqCst)) {
                 // Switch to a read lock.
                 @atomicStore(State, &self.lock.shared_state, .ReadLock, .SeqCst);
                 while (self.lock.reader_queue.get()) |node| {
@@ -71,7 +71,7 @@ pub const RwLock = struct {
                 return;
             }
 
-            @atomicStore(u8, &self.lock.writer_queue_empty_bit, 1, .SeqCst);
+            @atomicStore(bool, &self.lock.writer_queue_empty, true, .SeqCst);
             @atomicStore(State, &self.lock.shared_state, .Unlocked, .SeqCst);
 
             self.lock.commonPostUnlock();
@@ -79,12 +79,12 @@ pub const RwLock = struct {
     };
 
     pub fn init() RwLock {
-        return RwLock{
+        return .{
             .shared_state = .Unlocked,
             .writer_queue = Queue.init(),
-            .writer_queue_empty_bit = 1,
+            .writer_queue_empty = true,
             .reader_queue = Queue.init(),
-            .reader_queue_empty_bit = 1,
+            .reader_queue_empty = true,
             .reader_lock_count = 0,
         };
     }
@@ -111,9 +111,9 @@ pub const RwLock = struct {
 
             // At this point, we are in the reader_queue, so we might have already been resumed.
 
-            // We set this bit so that later we can rely on the fact, that if reader_queue_empty_bit is 1,
+            // We set this bit so that later we can rely on the fact, that if reader_queue_empty == true,
             // some actor will attempt to grab the lock.
-            @atomicStore(u8, &self.reader_queue_empty_bit, 0, .SeqCst);
+            @atomicStore(bool, &self.reader_queue_empty, false, .SeqCst);
 
             // Here we don't care if we are the one to do the locking or if it was already locked for reading.
             const have_read_lock = if (@cmpxchgStrong(State, &self.shared_state, .Unlocked, .ReadLock, .SeqCst, .SeqCst)) |old_state| old_state == .ReadLock else true;
@@ -142,9 +142,9 @@ pub const RwLock = struct {
 
             // At this point, we are in the writer_queue, so we might have already been resumed.
 
-            // We set this bit so that later we can rely on the fact, that if writer_queue_empty_bit is 1,
+            // We set this bit so that later we can rely on the fact, that if writer_queue_empty == true,
             // some actor will attempt to grab the lock.
-            @atomicStore(u8, &self.writer_queue_empty_bit, 0, .SeqCst);
+            @atomicStore(bool, &self.writer_queue_empty, false, .SeqCst);
 
             // Here we must be the one to acquire the write lock. It cannot already be locked.
             if (@cmpxchgStrong(State, &self.shared_state, .Unlocked, .WriteLock, .SeqCst, .SeqCst) == null) {
@@ -165,7 +165,7 @@ pub const RwLock = struct {
             // obtain the lock.
             // But if there's a writer_queue item or a reader_queue item,
             // we are the actor which must loop and attempt to grab the lock again.
-            if (@atomicLoad(u8, &self.writer_queue_empty_bit, .SeqCst) == 0) {
+            if (!@atomicLoad(bool, &self.writer_queue_empty, .SeqCst)) {
                 if (@cmpxchgStrong(State, &self.shared_state, .Unlocked, .WriteLock, .SeqCst, .SeqCst) != null) {
                     // We did not obtain the lock. Great, the queues are someone else's problem.
                     return;
@@ -176,12 +176,12 @@ pub const RwLock = struct {
                     return;
                 }
                 // Release the lock again.
-                @atomicStore(u8, &self.writer_queue_empty_bit, 1, .SeqCst);
+                @atomicStore(bool, &self.writer_queue_empty, true, .SeqCst);
                 @atomicStore(State, &self.shared_state, .Unlocked, .SeqCst);
                 continue;
             }
 
-            if (@atomicLoad(u8, &self.reader_queue_empty_bit, .SeqCst) == 0) {
+            if (!@atomicLoad(bool, &self.reader_queue_empty, .SeqCst)) {
                 if (@cmpxchgStrong(State, &self.shared_state, .Unlocked, .ReadLock, .SeqCst, .SeqCst) != null) {
                     // We did not obtain the lock. Great, the queues are someone else's problem.
                     return;
@@ -195,7 +195,7 @@ pub const RwLock = struct {
                     return;
                 }
                 // Release the lock again.
-                @atomicStore(u8, &self.reader_queue_empty_bit, 1, .SeqCst);
+                @atomicStore(bool, &self.reader_queue_empty, true, .SeqCst);
                 if (@cmpxchgStrong(State, &self.shared_state, .ReadLock, .Unlocked, .SeqCst, .SeqCst) != null) {
                     // Didn't unlock. Someone else's problem.
                     return;
diff --git a/lib/std/fifo.zig b/lib/std/fifo.zig
index 85a0e4c9d2..94570e93ef 100644
--- a/lib/std/fifo.zig
+++ b/lib/std/fifo.zig
@@ -293,8 +293,18 @@ pub fn LinearFifo(
 
         pub usingnamespace if (T == u8)
             struct {
-                pub fn print(self: *Self, comptime format: []const u8, args: var) !void {
-                    return std.fmt.format(self, error{OutOfMemory}, Self.write, format, args);
+                const OutStream = std.io.OutStream(*Self, Error, appendWrite);
+                const Error = error{OutOfMemory};
+
+                /// Same as `write` except it returns the number of bytes written, which is always the same
+                /// as `bytes.len`. The purpose of this function existing is to match `std.io.OutStream` API.
+                pub fn appendWrite(fifo: *Self, bytes: []const u8) Error!usize {
+                    try fifo.write(bytes);
+                    return bytes.len;
+                }
+
+                pub fn outStream(self: *Self) OutStream {
+                    return .{ .context = self };
                 }
             }
         else
@@ -407,7 +417,7 @@ test "LinearFifo(u8, .Dynamic)" {
     fifo.shrink(0);
 
     {
-        try fifo.print("{}, {}!", .{ "Hello", "World" });
+        try fifo.outStream().print("{}, {}!", .{ "Hello", "World" });
         var result: [30]u8 = undefined;
         testing.expectEqualSlices(u8, "Hello, World!", result[0..fifo.read(&result)]);
         testing.expectEqual(@as(usize, 0), fifo.readableLength());
diff --git a/lib/std/fmt.zig b/lib/std/fmt.zig
index 0a746b3583..a7d6d6928e 100644
--- a/lib/std/fmt.zig
+++ b/lib/std/fmt.zig
@@ -69,19 +69,17 @@ fn peekIsAlign(comptime fmt: []const u8) bool {
 ///
 /// If a formatted user type contains a function of the type
 /// ```
-/// fn format(value: ?, comptime fmt: []const u8, options: std.fmt.FormatOptions, context: var, comptime Errors: type, comptime output: fn (@TypeOf(context), []const u8) Errors!void) Errors!void
+/// fn format(value: ?, comptime fmt: []const u8, options: std.fmt.FormatOptions, out_stream: var) !void
 /// ```
 /// with `?` being the type formatted, this function will be called instead of the default implementation.
 /// This allows user types to be formatted in a logical manner instead of dumping all fields of the type.
 ///
 /// A user type may be a `struct`, `vector`, `union` or `enum` type.
 pub fn format(
-    context: var,
-    comptime Errors: type,
-    comptime output: fn (@TypeOf(context), []const u8) Errors!void,
+    out_stream: var,
     comptime fmt: []const u8,
     args: var,
-) Errors!void {
+) !void {
     const ArgSetType = u32;
     if (@typeInfo(@TypeOf(args)) != .Struct) {
         @compileError("Expected tuple or struct argument, found " ++ @typeName(@TypeOf(args)));
@@ -138,7 +136,7 @@ pub fn format(
             .Start => switch (c) {
                 '{' => {
                     if (start_index < i) {
-                        try output(context, fmt[start_index..i]);
+                        try out_stream.writeAll(fmt[start_index..i]);
                     }
 
                     start_index = i;
@@ -150,7 +148,7 @@ pub fn format(
                 },
                 '}' => {
                     if (start_index < i) {
-                        try output(context, fmt[start_index..i]);
+                        try out_stream.writeAll(fmt[start_index..i]);
                     }
                     state = .CloseBrace;
                 },
@@ -185,9 +183,7 @@ pub fn format(
                         args[arg_to_print],
                         fmt[0..0],
                         options,
-                        context,
-                        Errors,
-                        output,
+                        out_stream,
                         default_max_depth,
                     );
 
@@ -218,9 +214,7 @@ pub fn format(
                         args[arg_to_print],
                         fmt[specifier_start..i],
                         options,
-                        context,
-                        Errors,
-                        output,
+                        out_stream,
                         default_max_depth,
                     );
                     state = .Start;
@@ -265,9 +259,7 @@ pub fn format(
                         args[arg_to_print],
                         fmt[specifier_start..specifier_end],
                         options,
-                        context,
-                        Errors,
-                        output,
+                        out_stream,
                         default_max_depth,
                     );
                     state = .Start;
@@ -293,9 +285,7 @@ pub fn format(
                         args[arg_to_print],
                         fmt[specifier_start..specifier_end],
                         options,
-                        context,
-                        Errors,
-                        output,
+                        out_stream,
                         default_max_depth,
                     );
                     state = .Start;
@@ -316,7 +306,7 @@ pub fn format(
         }
     }
     if (start_index < fmt.len) {
-        try output(context, fmt[start_index..]);
+        try out_stream.writeAll(fmt[start_index..]);
     }
 }
 
@@ -324,141 +314,131 @@ pub fn formatType(
     value: var,
     comptime fmt: []const u8,
     options: FormatOptions,
-    context: var,
-    comptime Errors: type,
-    comptime output: fn (@TypeOf(context), []const u8) Errors!void,
+    out_stream: var,
     max_depth: usize,
-) Errors!void {
+) @TypeOf(out_stream).Error!void {
     if (comptime std.mem.eql(u8, fmt, "*")) {
-        try output(context, @typeName(@TypeOf(value).Child));
-        try output(context, "@");
-        try formatInt(@ptrToInt(value), 16, false, FormatOptions{}, context, Errors, output);
+        try out_stream.writeAll(@typeName(@TypeOf(value).Child));
+        try out_stream.writeAll("@");
+        try formatInt(@ptrToInt(value), 16, false, FormatOptions{}, out_stream);
         return;
     }
 
     const T = @TypeOf(value);
+    if (comptime std.meta.trait.hasFn("format")(T)) {
+        return try value.format(fmt, options, out_stream);
+    }
+
     switch (@typeInfo(T)) {
         .ComptimeInt, .Int, .Float => {
-            return formatValue(value, fmt, options, context, Errors, output);
+            return formatValue(value, fmt, options, out_stream);
         },
         .Void => {
-            return output(context, "void");
+            return out_stream.writeAll("void");
         },
         .Bool => {
-            return output(context, if (value) "true" else "false");
+            return out_stream.writeAll(if (value) "true" else "false");
         },
         .Optional => {
             if (value) |payload| {
-                return formatType(payload, fmt, options, context, Errors, output, max_depth);
+                return formatType(payload, fmt, options, out_stream, max_depth);
             } else {
-                return output(context, "null");
+                return out_stream.writeAll("null");
             }
         },
         .ErrorUnion => {
             if (value) |payload| {
-                return formatType(payload, fmt, options, context, Errors, output, max_depth);
+                return formatType(payload, fmt, options, out_stream, max_depth);
             } else |err| {
-                return formatType(err, fmt, options, context, Errors, output, max_depth);
+                return formatType(err, fmt, options, out_stream, max_depth);
             }
         },
         .ErrorSet => {
-            try output(context, "error.");
-            return output(context, @errorName(value));
+            try out_stream.writeAll("error.");
+            return out_stream.writeAll(@errorName(value));
         },
         .Enum => |enumInfo| {
-            if (comptime std.meta.trait.hasFn("format")(T)) {
-                return value.format(fmt, options, context, Errors, output);
-            }
-
-            try output(context, @typeName(T));
+            try out_stream.writeAll(@typeName(T));
             if (enumInfo.is_exhaustive) {
-                try output(context, ".");
-                try output(context, @tagName(value));
+                try out_stream.writeAll(".");
+                try out_stream.writeAll(@tagName(value));
             } else {
                 // TODO: when @tagName works on exhaustive enums print known enum strings
-                try output(context, "(");
-                try formatType(@enumToInt(value), fmt, options, context, Errors, output, max_depth);
-                try output(context, ")");
+                try out_stream.writeAll("(");
+                try formatType(@enumToInt(value), fmt, options, out_stream, max_depth);
+                try out_stream.writeAll(")");
             }
         },
         .Union => {
-            if (comptime std.meta.trait.hasFn("format")(T)) {
-                return value.format(fmt, options, context, Errors, output);
-            }
-
-            try output(context, @typeName(T));
+            try out_stream.writeAll(@typeName(T));
             if (max_depth == 0) {
-                return output(context, "{ ... }");
+                return out_stream.writeAll("{ ... }");
             }
             const info = @typeInfo(T).Union;
             if (info.tag_type) |UnionTagType| {
-                try output(context, "{ .");
-                try output(context, @tagName(@as(UnionTagType, value)));
-                try output(context, " = ");
+                try out_stream.writeAll("{ .");
+                try out_stream.writeAll(@tagName(@as(UnionTagType, value)));
+                try out_stream.writeAll(" = ");
                 inline for (info.fields) |u_field| {
                     if (@enumToInt(@as(UnionTagType, value)) == u_field.enum_field.?.value) {
-                        try formatType(@field(value, u_field.name), fmt, options, context, Errors, output, max_depth - 1);
+                        try formatType(@field(value, u_field.name), fmt, options, out_stream, max_depth - 1);
                     }
                 }
-                try output(context, " }");
+                try out_stream.writeAll(" }");
             } else {
-                try format(context, Errors, output, "@{x}", .{@ptrToInt(&value)});
+                try format(out_stream, "@{x}", .{@ptrToInt(&value)});
             }
         },
         .Struct => |StructT| {
-            if (comptime std.meta.trait.hasFn("format")(T)) {
-                return value.format(fmt, options, context, Errors, output);
-            }
-
-            try output(context, @typeName(T));
+            try out_stream.writeAll(@typeName(T));
             if (max_depth == 0) {
-                return output(context, "{ ... }");
+                return out_stream.writeAll("{ ... }");
             }
-            try output(context, "{");
+            try out_stream.writeAll("{");
             inline for (StructT.fields) |f, i| {
                 if (i == 0) {
-                    try output(context, " .");
+                    try out_stream.writeAll(" .");
                 } else {
-                    try output(context, ", .");
+                    try out_stream.writeAll(", .");
                 }
-                try output(context, f.name);
-                try output(context, " = ");
-                try formatType(@field(value, f.name), fmt, options, context, Errors, output, max_depth - 1);
+                try out_stream.writeAll(f.name);
+                try out_stream.writeAll(" = ");
+                try formatType(@field(value, f.name), fmt, options, out_stream, max_depth - 1);
             }
-            try output(context, " }");
+            try out_stream.writeAll(" }");
         },
         .Pointer => |ptr_info| switch (ptr_info.size) {
             .One => switch (@typeInfo(ptr_info.child)) {
                 .Array => |info| {
                     if (info.child == u8) {
-                        return formatText(value, fmt, options, context, Errors, output);
+                        return formatText(value, fmt, options, out_stream);
                     }
-                    return format(context, Errors, output, "{}@{x}", .{ @typeName(T.Child), @ptrToInt(value) });
+                    return format(out_stream, "{}@{x}", .{ @typeName(T.Child), @ptrToInt(value) });
                 },
                 .Enum, .Union, .Struct => {
-                    return formatType(value.*, fmt, options, context, Errors, output, max_depth);
+                    return formatType(value.*, fmt, options, out_stream, max_depth);
                 },
-                else => return format(context, Errors, output, "{}@{x}", .{ @typeName(T.Child), @ptrToInt(value) }),
+                else => return format(out_stream, "{}@{x}", .{ @typeName(T.Child), @ptrToInt(value) }),
             },
             .Many, .C => {
                 if (ptr_info.sentinel) |sentinel| {
-                    return formatType(mem.span(value), fmt, options, context, Errors, output, max_depth);
+                    return formatType(mem.span(value), fmt, options, out_stream, max_depth);
                 }
                 if (ptr_info.child == u8) {
                     if (fmt.len > 0 and fmt[0] == 's') {
-                        return formatText(mem.span(value), fmt, options, context, Errors, output);
+                        return formatText(mem.span(value), fmt, options, out_stream);
                     }
                 }
-                return format(context, Errors, output, "{}@{x}", .{ @typeName(T.Child), @ptrToInt(value) });
+                return format(out_stream, "{}@{x}", .{ @typeName(T.Child), @ptrToInt(value) });
             },
             .Slice => {
                 if (fmt.len > 0 and ((fmt[0] == 'x') or (fmt[0] == 'X'))) {
-                    return formatText(value, fmt, options, context, Errors, output);
+                    return formatText(value, fmt, options, out_stream);
                 }
                 if (ptr_info.child == u8) {
-                    return formatText(value, fmt, options, context, Errors, output);
+                    return formatText(value, fmt, options, out_stream);
                 }
-                return format(context, Errors, output, "{}@{x}", .{ @typeName(ptr_info.child), @ptrToInt(value.ptr) });
+                return format(out_stream, "{}@{x}", .{ @typeName(ptr_info.child), @ptrToInt(value.ptr) });
             },
         },
         .Array => |info| {
@@ -473,30 +453,27 @@ pub fn formatType(
                     .sentinel = null,
                 },
             });
-            return formatType(@as(Slice, &value), fmt, options, context, Errors, output, max_depth);
+            return formatType(@as(Slice, &value), fmt, options, out_stream, max_depth);
         },
         .Vector => {
             const len = @typeInfo(T).Vector.len;
-            try output(context, "{ ");
+            try out_stream.writeAll("{ ");
             var i: usize = 0;
             while (i < len) : (i += 1) {
-                try formatValue(value[i], fmt, options, context, Errors, output);
+                try formatValue(value[i], fmt, options, out_stream);
                 if (i < len - 1) {
-                    try output(context, ", ");
+                    try out_stream.writeAll(", ");
                 }
             }
-            try output(context, " }");
+            try out_stream.writeAll(" }");
         },
         .Fn => {
-            return format(context, Errors, output, "{}@{x}", .{ @typeName(T), @ptrToInt(value) });
+            return format(out_stream, "{}@{x}", .{ @typeName(T), @ptrToInt(value) });
         },
-        .Type => return output(context, @typeName(T)),
+        .Type => return out_stream.writeAll(@typeName(T)),
         .EnumLiteral => {
-            const name = @tagName(value);
-            var buffer: [name.len + 1]u8 = undefined;
-            buffer[0] = '.';
-            std.mem.copy(u8, buffer[1..], name);
-            return formatType(buffer, fmt, options, context, Errors, output, max_depth);
+            const buffer = [_]u8{'.'} ++ @tagName(value);
+            return formatType(buffer, fmt, options, out_stream, max_depth);
         },
         else => @compileError("Unable to format type '" ++ @typeName(T) ++ "'"),
     }
@@ -506,21 +483,19 @@ fn formatValue(
     value: var,
     comptime fmt: []const u8,
     options: FormatOptions,
-    context: var,
-    comptime Errors: type,
-    comptime output: fn (@TypeOf(context), []const u8) Errors!void,
-) Errors!void {
+    out_stream: var,
+) !void {
     if (comptime std.mem.eql(u8, fmt, "B")) {
-        return formatBytes(value, options, 1000, context, Errors, output);
+        return formatBytes(value, options, 1000, out_stream);
     } else if (comptime std.mem.eql(u8, fmt, "Bi")) {
-        return formatBytes(value, options, 1024, context, Errors, output);
+        return formatBytes(value, options, 1024, out_stream);
     }
 
     const T = @TypeOf(value);
     switch (@typeInfo(T)) {
-        .Float => return formatFloatValue(value, fmt, options, context, Errors, output),
-        .Int, .ComptimeInt => return formatIntValue(value, fmt, options, context, Errors, output),
-        .Bool => return output(context, if (value) "true" else "false"),
+        .Float => return formatFloatValue(value, fmt, options, out_stream),
+        .Int, .ComptimeInt => return formatIntValue(value, fmt, options, out_stream),
+        .Bool => return out_stream.writeAll(if (value) "true" else "false"),
         else => comptime unreachable,
     }
 }
@@ -529,10 +504,8 @@ pub fn formatIntValue(
     value: var,
     comptime fmt: []const u8,
     options: FormatOptions,
-    context: var,
-    comptime Errors: type,
-    comptime output: fn (@TypeOf(context), []const u8) Errors!void,
-) Errors!void {
+    out_stream: var,
+) !void {
     comptime var radix = 10;
     comptime var uppercase = false;
 
@@ -547,7 +520,7 @@ pub fn formatIntValue(
         uppercase = false;
     } else if (comptime std.mem.eql(u8, fmt, "c")) {
         if (@TypeOf(int_value).bit_count <= 8) {
-            return formatAsciiChar(@as(u8, int_value), options, context, Errors, output);
+            return formatAsciiChar(@as(u8, int_value), options, out_stream);
         } else {
             @compileError("Cannot print integer that is larger than 8 bits as a ascii");
         }
@@ -564,21 +537,19 @@ pub fn formatIntValue(
         @compileError("Unknown format string: '" ++ fmt ++ "'");
     }
 
-    return formatInt(int_value, radix, uppercase, options, context, Errors, output);
+    return formatInt(int_value, radix, uppercase, options, out_stream);
 }
 
 fn formatFloatValue(
     value: var,
     comptime fmt: []const u8,
     options: FormatOptions,
-    context: var,
-    comptime Errors: type,
-    comptime output: fn (@TypeOf(context), []const u8) Errors!void,
-) Errors!void {
+    out_stream: var,
+) !void {
     if (fmt.len == 0 or comptime std.mem.eql(u8, fmt, "e")) {
-        return formatFloatScientific(value, options, context, Errors, output);
+        return formatFloatScientific(value, options, out_stream);
     } else if (comptime std.mem.eql(u8, fmt, "d")) {
-        return formatFloatDecimal(value, options, context, Errors, output);
+        return formatFloatDecimal(value, options, out_stream);
     } else {
         @compileError("Unknown format string: '" ++ fmt ++ "'");
     }
@@ -588,17 +559,15 @@ pub fn formatText(
     bytes: []const u8,
     comptime fmt: []const u8,
     options: FormatOptions,
-    context: var,
-    comptime Errors: type,
-    comptime output: fn (@TypeOf(context), []const u8) Errors!void,
-) Errors!void {
+    out_stream: var,
+) !void {
     if (fmt.len == 0) {
-        return output(context, bytes);
+        return out_stream.writeAll(bytes);
     } else if (comptime std.mem.eql(u8, fmt, "s")) {
-        return formatBuf(bytes, options, context, Errors, output);
+        return formatBuf(bytes, options, out_stream);
     } else if (comptime (std.mem.eql(u8, fmt, "x") or std.mem.eql(u8, fmt, "X"))) {
         for (bytes) |c| {
-            try formatInt(c, 16, fmt[0] == 'X', FormatOptions{ .width = 2, .fill = '0' }, context, Errors, output);
+            try formatInt(c, 16, fmt[0] == 'X', FormatOptions{ .width = 2, .fill = '0' }, out_stream);
         }
         return;
     } else {
@@ -609,27 +578,23 @@ pub fn formatText(
 pub fn formatAsciiChar(
     c: u8,
     options: FormatOptions,
-    context: var,
-    comptime Errors: type,
-    comptime output: fn (@TypeOf(context), []const u8) Errors!void,
-) Errors!void {
-    return output(context, @as(*const [1]u8, &c)[0..]);
+    out_stream: var,
+) !void {
+    return out_stream.writeAll(@as(*const [1]u8, &c));
 }
 
 pub fn formatBuf(
     buf: []const u8,
     options: FormatOptions,
-    context: var,
-    comptime Errors: type,
-    comptime output: fn (@TypeOf(context), []const u8) Errors!void,
-) Errors!void {
-    try output(context, buf);
+    out_stream: var,
+) !void {
+    try out_stream.writeAll(buf);
 
     const width = options.width orelse 0;
     var leftover_padding = if (width > buf.len) (width - buf.len) else return;
-    const pad_byte: u8 = options.fill;
+    const pad_byte = [1]u8{options.fill};
     while (leftover_padding > 0) : (leftover_padding -= 1) {
-        try output(context, @as(*const [1]u8, &pad_byte)[0..1]);
+        try out_stream.writeAll(&pad_byte);
     }
 }
 
@@ -639,40 +604,38 @@ pub fn formatBuf(
 pub fn formatFloatScientific(
     value: var,
     options: FormatOptions,
-    context: var,
-    comptime Errors: type,
-    comptime output: fn (@TypeOf(context), []const u8) Errors!void,
-) Errors!void {
+    out_stream: var,
+) !void {
     var x = @floatCast(f64, value);
 
     // Errol doesn't handle these special cases.
     if (math.signbit(x)) {
-        try output(context, "-");
+        try out_stream.writeAll("-");
         x = -x;
     }
 
     if (math.isNan(x)) {
-        return output(context, "nan");
+        return out_stream.writeAll("nan");
     }
     if (math.isPositiveInf(x)) {
-        return output(context, "inf");
+        return out_stream.writeAll("inf");
     }
     if (x == 0.0) {
-        try output(context, "0");
+        try out_stream.writeAll("0");
 
         if (options.precision) |precision| {
             if (precision != 0) {
-                try output(context, ".");
+                try out_stream.writeAll(".");
                 var i: usize = 0;
                 while (i < precision) : (i += 1) {
-                    try output(context, "0");
+                    try out_stream.writeAll("0");
                 }
             }
         } else {
-            try output(context, ".0");
+            try out_stream.writeAll(".0");
         }
 
-        try output(context, "e+00");
+        try out_stream.writeAll("e+00");
         return;
     }
 
@@ -682,50 +645,50 @@ pub fn formatFloatScientific(
     if (options.precision) |precision| {
         errol.roundToPrecision(&float_decimal, precision, errol.RoundMode.Scientific);
 
-        try output(context, float_decimal.digits[0..1]);
+        try out_stream.writeAll(float_decimal.digits[0..1]);
 
         // {e0} case prints no `.`
         if (precision != 0) {
-            try output(context, ".");
+            try out_stream.writeAll(".");
 
             var printed: usize = 0;
             if (float_decimal.digits.len > 1) {
                 const num_digits = math.min(float_decimal.digits.len, precision + 1);
-                try output(context, float_decimal.digits[1..num_digits]);
+                try out_stream.writeAll(float_decimal.digits[1..num_digits]);
                 printed += num_digits - 1;
             }
 
             while (printed < precision) : (printed += 1) {
-                try output(context, "0");
+                try out_stream.writeAll("0");
             }
         }
     } else {
-        try output(context, float_decimal.digits[0..1]);
-        try output(context, ".");
+        try out_stream.writeAll(float_decimal.digits[0..1]);
+        try out_stream.writeAll(".");
         if (float_decimal.digits.len > 1) {
             const num_digits = if (@TypeOf(value) == f32) math.min(@as(usize, 9), float_decimal.digits.len) else float_decimal.digits.len;
 
-            try output(context, float_decimal.digits[1..num_digits]);
+            try out_stream.writeAll(float_decimal.digits[1..num_digits]);
         } else {
-            try output(context, "0");
+            try out_stream.writeAll("0");
         }
     }
 
-    try output(context, "e");
+    try out_stream.writeAll("e");
     const exp = float_decimal.exp - 1;
 
     if (exp >= 0) {
-        try output(context, "+");
+        try out_stream.writeAll("+");
         if (exp > -10 and exp < 10) {
-            try output(context, "0");
+            try out_stream.writeAll("0");
         }
-        try formatInt(exp, 10, false, FormatOptions{ .width = 0 }, context, Errors, output);
+        try formatInt(exp, 10, false, FormatOptions{ .width = 0 }, out_stream);
     } else {
-        try output(context, "-");
+        try out_stream.writeAll("-");
         if (exp > -10 and exp < 10) {
-            try output(context, "0");
+            try out_stream.writeAll("0");
         }
-        try formatInt(-exp, 10, false, FormatOptions{ .width = 0 }, context, Errors, output);
+        try formatInt(-exp, 10, false, FormatOptions{ .width = 0 }, out_stream);
     }
 }
 
@@ -734,36 +697,34 @@ pub fn formatFloatScientific(
 pub fn formatFloatDecimal(
     value: var,
     options: FormatOptions,
-    context: var,
-    comptime Errors: type,
-    comptime output: fn (@TypeOf(context), []const u8) Errors!void,
-) Errors!void {
+    out_stream: var,
+) !void {
     var x = @as(f64, value);
 
     // Errol doesn't handle these special cases.
     if (math.signbit(x)) {
-        try output(context, "-");
+        try out_stream.writeAll("-");
         x = -x;
     }
 
     if (math.isNan(x)) {
-        return output(context, "nan");
+        return out_stream.writeAll("nan");
     }
     if (math.isPositiveInf(x)) {
-        return output(context, "inf");
+        return out_stream.writeAll("inf");
     }
     if (x == 0.0) {
-        try output(context, "0");
+        try out_stream.writeAll("0");
 
         if (options.precision) |precision| {
             if (precision != 0) {
-                try output(context, ".");
+                try out_stream.writeAll(".");
                 var i: usize = 0;
                 while (i < precision) : (i += 1) {
-                    try output(context, "0");
+                    try out_stream.writeAll("0");
                 }
             } else {
-                try output(context, ".0");
+                try out_stream.writeAll(".0");
             }
         }
 
@@ -785,14 +746,14 @@ pub fn formatFloatDecimal(
 
         if (num_digits_whole > 0) {
             // We may have to zero pad, for instance 1e4 requires zero padding.
-            try output(context, float_decimal.digits[0..num_digits_whole_no_pad]);
+            try out_stream.writeAll(float_decimal.digits[0..num_digits_whole_no_pad]);
 
             var i = num_digits_whole_no_pad;
             while (i < num_digits_whole) : (i += 1) {
-                try output(context, "0");
+                try out_stream.writeAll("0");
             }
         } else {
-            try output(context, "0");
+            try out_stream.writeAll("0");
         }
 
         // {.0} special case doesn't want a trailing '.'
@@ -800,7 +761,7 @@ pub fn formatFloatDecimal(
             return;
         }
 
-        try output(context, ".");
+        try out_stream.writeAll(".");
 
         // Keep track of fractional count printed for case where we pre-pad then post-pad with 0's.
         var printed: usize = 0;
@@ -812,7 +773,7 @@ pub fn formatFloatDecimal(
 
             var i: usize = 0;
             while (i < zeros_to_print) : (i += 1) {
-                try output(context, "0");
+                try out_stream.writeAll("0");
                 printed += 1;
             }
 
@@ -824,14 +785,14 @@ pub fn formatFloatDecimal(
         // Remaining fractional portion, zero-padding if insufficient.
         assert(precision >= printed);
         if (num_digits_whole_no_pad + precision - printed < float_decimal.digits.len) {
-            try output(context, float_decimal.digits[num_digits_whole_no_pad .. num_digits_whole_no_pad + precision - printed]);
+            try out_stream.writeAll(float_decimal.digits[num_digits_whole_no_pad .. num_digits_whole_no_pad + precision - printed]);
             return;
         } else {
-            try output(context, float_decimal.digits[num_digits_whole_no_pad..]);
+            try out_stream.writeAll(float_decimal.digits[num_digits_whole_no_pad..]);
             printed += float_decimal.digits.len - num_digits_whole_no_pad;
 
             while (printed < precision) : (printed += 1) {
-                try output(context, "0");
+                try out_stream.writeAll("0");
             }
         }
     } else {
@@ -843,14 +804,14 @@ pub fn formatFloatDecimal(
 
         if (num_digits_whole > 0) {
             // We may have to zero pad, for instance 1e4 requires zero padding.
-            try output(context, float_decimal.digits[0..num_digits_whole_no_pad]);
+            try out_stream.writeAll(float_decimal.digits[0..num_digits_whole_no_pad]);
 
             var i = num_digits_whole_no_pad;
             while (i < num_digits_whole) : (i += 1) {
-                try output(context, "0");
+                try out_stream.writeAll("0");
             }
         } else {
-            try output(context, "0");
+            try out_stream.writeAll("0");
         }
 
         // Omit `.` if no fractional portion
@@ -858,7 +819,7 @@ pub fn formatFloatDecimal(
             return;
         }
 
-        try output(context, ".");
+        try out_stream.writeAll(".");
 
         // Zero-fill until we reach significant digits or run out of precision.
         if (float_decimal.exp < 0) {
@@ -866,11 +827,11 @@ pub fn formatFloatDecimal(
 
             var i: usize = 0;
             while (i < zero_digit_count) : (i += 1) {
-                try output(context, "0");
+                try out_stream.writeAll("0");
             }
         }
 
-        try output(context, float_decimal.digits[num_digits_whole_no_pad..]);
+        try out_stream.writeAll(float_decimal.digits[num_digits_whole_no_pad..]);
     }
 }
 
@@ -878,12 +839,10 @@ pub fn formatBytes(
     value: var,
     options: FormatOptions,
     comptime radix: usize,
-    context: var,
-    comptime Errors: type,
-    comptime output: fn (@TypeOf(context), []const u8) Errors!void,
-) Errors!void {
+    out_stream: var,
+) !void {
     if (value == 0) {
-        return output(context, "0B");
+        return out_stream.writeAll("0B");
     }
 
     const mags_si = " kMGTPEZY";
@@ -900,10 +859,10 @@ pub fn formatBytes(
         else => unreachable,
     };
 
-    try formatFloatDecimal(new_value, options, context, Errors, output);
+    try formatFloatDecimal(new_value, options, out_stream);
 
     if (suffix == ' ') {
-        return output(context, "B");
+        return out_stream.writeAll("B");
     }
 
     const buf = switch (radix) {
@@ -911,7 +870,7 @@ pub fn formatBytes(
         1024 => &[_]u8{ suffix, 'i', 'B' },
         else => unreachable,
     };
-    return output(context, buf);
+    return out_stream.writeAll(buf);
 }
 
 pub fn formatInt(
@@ -919,10 +878,8 @@ pub fn formatInt(
     base: u8,
     uppercase: bool,
     options: FormatOptions,
-    context: var,
-    comptime Errors: type,
-    comptime output: fn (@TypeOf(context), []const u8) Errors!void,
-) Errors!void {
+    out_stream: var,
+) !void {
     const int_value = if (@TypeOf(value) == comptime_int) blk: {
         const Int = math.IntFittingRange(value, value);
         break :blk @as(Int, value);
@@ -930,9 +887,9 @@ pub fn formatInt(
         value;
 
     if (@TypeOf(int_value).is_signed) {
-        return formatIntSigned(int_value, base, uppercase, options, context, Errors, output);
+        return formatIntSigned(int_value, base, uppercase, options, out_stream);
     } else {
-        return formatIntUnsigned(int_value, base, uppercase, options, context, Errors, output);
+        return formatIntUnsigned(int_value, base, uppercase, options, out_stream);
     }
 }
 
@@ -941,10 +898,8 @@ fn formatIntSigned(
     base: u8,
     uppercase: bool,
     options: FormatOptions,
-    context: var,
-    comptime Errors: type,
-    comptime output: fn (@TypeOf(context), []const u8) Errors!void,
-) Errors!void {
+    out_stream: var,
+) !void {
     const new_options = FormatOptions{
         .width = if (options.width) |w| (if (w == 0) 0 else w - 1) else null,
         .precision = options.precision,
@@ -953,15 +908,15 @@ fn formatIntSigned(
     const bit_count = @typeInfo(@TypeOf(value)).Int.bits;
     const Uint = std.meta.IntType(false, bit_count);
     if (value < 0) {
-        try output(context, "-");
+        try out_stream.writeAll("-");
         const new_value = math.absCast(value);
-        return formatIntUnsigned(new_value, base, uppercase, new_options, context, Errors, output);
+        return formatIntUnsigned(new_value, base, uppercase, new_options, out_stream);
     } else if (options.width == null or options.width.? == 0) {
-        return formatIntUnsigned(@intCast(Uint, value), base, uppercase, options, context, Errors, output);
+        return formatIntUnsigned(@intCast(Uint, value), base, uppercase, options, out_stream);
     } else {
-        try output(context, "+");
+        try out_stream.writeAll("+");
         const new_value = @intCast(Uint, value);
-        return formatIntUnsigned(new_value, base, uppercase, new_options, context, Errors, output);
+        return formatIntUnsigned(new_value, base, uppercase, new_options, out_stream);
     }
 }
 
@@ -970,10 +925,8 @@ fn formatIntUnsigned(
     base: u8,
     uppercase: bool,
     options: FormatOptions,
-    context: var,
-    comptime Errors: type,
-    comptime output: fn (@TypeOf(context), []const u8) Errors!void,
-) Errors!void {
+    out_stream: var,
+) !void {
     assert(base >= 2);
     var buf: [math.max(@TypeOf(value).bit_count, 1)]u8 = undefined;
     const min_int_bits = comptime math.max(@TypeOf(value).bit_count, @TypeOf(base).bit_count);
@@ -997,34 +950,23 @@ fn formatIntUnsigned(
         const zero_byte: u8 = options.fill;
         var leftover_padding = padding - index;
         while (true) {
-            try output(context, @as(*const [1]u8, &zero_byte)[0..]);
+            try out_stream.writeAll(@as(*const [1]u8, &zero_byte)[0..]);
             leftover_padding -= 1;
             if (leftover_padding == 0) break;
         }
         mem.set(u8, buf[0..index], options.fill);
-        return output(context, &buf);
+        return out_stream.writeAll(&buf);
     } else {
         const padded_buf = buf[index - padding ..];
         mem.set(u8, padded_buf[0..padding], options.fill);
-        return output(context, padded_buf);
+        return out_stream.writeAll(padded_buf);
     }
 }
 
 pub fn formatIntBuf(out_buf: []u8, value: var, base: u8, uppercase: bool, options: FormatOptions) usize {
-    var context = FormatIntBuf{
-        .out_buf = out_buf,
-        .index = 0,
-    };
-    formatInt(value, base, uppercase, options, &context, error{}, formatIntCallback) catch unreachable;
-    return context.index;
-}
-const FormatIntBuf = struct {
-    out_buf: []u8,
-    index: usize,
-};
-fn formatIntCallback(context: *FormatIntBuf, bytes: []const u8) (error{}!void) {
-    mem.copy(u8, context.out_buf[context.index..], bytes);
-    context.index += bytes.len;
+    var fbs = std.io.fixedBufferStream(out_buf);
+    formatInt(value, base, uppercase, options, fbs.outStream()) catch unreachable;
+    return fbs.pos;
 }
 
 pub fn parseInt(comptime T: type, buf: []const u8, radix: u8) !T {
@@ -1124,44 +1066,36 @@ fn digitToChar(digit: u8, uppercase: bool) u8 {
     };
 }
 
-const BufPrintContext = struct {
-    remaining: []u8,
-};
-
-fn bufPrintWrite(context: *BufPrintContext, bytes: []const u8) !void {
-    if (context.remaining.len < bytes.len) {
-        mem.copy(u8, context.remaining, bytes[0..context.remaining.len]);
-        return error.BufferTooSmall;
-    }
-    mem.copy(u8, context.remaining, bytes);
-    context.remaining = context.remaining[bytes.len..];
-}
-
 pub const BufPrintError = error{
     /// As much as possible was written to the buffer, but it was too small to fit all the printed bytes.
-    BufferTooSmall,
+    NoSpaceLeft,
 };
 pub fn bufPrint(buf: []u8, comptime fmt: []const u8, args: var) BufPrintError![]u8 {
-    var context = BufPrintContext{ .remaining = buf };
-    try format(&context, BufPrintError, bufPrintWrite, fmt, args);
-    return buf[0 .. buf.len - context.remaining.len];
+    var fbs = std.io.fixedBufferStream(buf);
+    try format(fbs.outStream(), fmt, args);
+    return fbs.getWritten();
+}
+
+// Count the characters needed for format. Useful for preallocating memory
+pub fn count(comptime fmt: []const u8, args: var) u64 {
+    var counting_stream = std.io.countingOutStream(std.io.null_out_stream);
+    format(counting_stream.outStream(), fmt, args) catch |err| switch (err) {};
+    return counting_stream.bytes_written;
 }
 
 pub const AllocPrintError = error{OutOfMemory};
 
 pub fn allocPrint(allocator: *mem.Allocator, comptime fmt: []const u8, args: var) AllocPrintError![]u8 {
-    var size: usize = 0;
-    format(&size, error{}, countSize, fmt, args) catch |err| switch (err) {};
+    const size = math.cast(usize, count(fmt, args)) catch |err| switch (err) {
+        // Output too long. Can't possibly allocate enough memory to display it.
+        error.Overflow => return error.OutOfMemory,
+    };
     const buf = try allocator.alloc(u8, size);
     return bufPrint(buf, fmt, args) catch |err| switch (err) {
-        error.BufferTooSmall => unreachable, // we just counted the size above
+        error.NoSpaceLeft => unreachable, // we just counted the size above
     };
 }
 
-fn countSize(size: *usize, bytes: []const u8) (error{}!void) {
-    size.* += bytes.len;
-}
-
 pub fn allocPrint0(allocator: *mem.Allocator, comptime fmt: []const u8, args: var) AllocPrintError![:0]u8 {
     const result = try allocPrint(allocator, fmt ++ "\x00", args);
     return result[0 .. result.len - 1 :0];
@@ -1254,20 +1188,17 @@ test "int.padded" {
 test "buffer" {
     {
         var buf1: [32]u8 = undefined;
-        var context = BufPrintContext{ .remaining = buf1[0..] };
-        try formatType(1234, "", FormatOptions{}, &context, error{BufferTooSmall}, bufPrintWrite, default_max_depth);
-        var res = buf1[0 .. buf1.len - context.remaining.len];
-        std.testing.expect(mem.eql(u8, res, "1234"));
+        var fbs = std.io.fixedBufferStream(&buf1);
+        try formatType(1234, "", FormatOptions{}, fbs.outStream(), default_max_depth);
+        std.testing.expect(mem.eql(u8, fbs.getWritten(), "1234"));
 
-        context = BufPrintContext{ .remaining = buf1[0..] };
-        try formatType('a', "c", FormatOptions{}, &context, error{BufferTooSmall}, bufPrintWrite, default_max_depth);
-        res = buf1[0 .. buf1.len - context.remaining.len];
-        std.testing.expect(mem.eql(u8, res, "a"));
+        fbs.reset();
+        try formatType('a', "c", FormatOptions{}, fbs.outStream(), default_max_depth);
+        std.testing.expect(mem.eql(u8, fbs.getWritten(), "a"));
 
-        context = BufPrintContext{ .remaining = buf1[0..] };
-        try formatType(0b1100, "b", FormatOptions{}, &context, error{BufferTooSmall}, bufPrintWrite, default_max_depth);
-        res = buf1[0 .. buf1.len - context.remaining.len];
-        std.testing.expect(mem.eql(u8, res, "1100"));
+        fbs.reset();
+        try formatType(0b1100, "b", FormatOptions{}, fbs.outStream(), default_max_depth);
+        std.testing.expect(mem.eql(u8, fbs.getWritten(), "1100"));
     }
 }
 
@@ -1452,14 +1383,12 @@ test "custom" {
             self: SelfType,
             comptime fmt: []const u8,
             options: FormatOptions,
-            context: var,
-            comptime Errors: type,
-            comptime output: fn (@TypeOf(context), []const u8) Errors!void,
-        ) Errors!void {
+            out_stream: var,
+        ) !void {
             if (fmt.len == 0 or comptime std.mem.eql(u8, fmt, "p")) {
-                return std.fmt.format(context, Errors, output, "({d:.3},{d:.3})", .{ self.x, self.y });
+                return std.fmt.format(out_stream, "({d:.3},{d:.3})", .{ self.x, self.y });
             } else if (comptime std.mem.eql(u8, fmt, "d")) {
-                return std.fmt.format(context, Errors, output, "{d:.3}x{d:.3}", .{ self.x, self.y });
+                return std.fmt.format(out_stream, "{d:.3}x{d:.3}", .{ self.x, self.y });
             } else {
                 @compileError("Unknown format character: '" ++ fmt ++ "'");
             }
@@ -1643,10 +1572,10 @@ test "hexToBytes" {
 test "formatIntValue with comptime_int" {
     const value: comptime_int = 123456789123456789;
 
-    var buf = std.ArrayList(u8).init(std.testing.allocator);
-    defer buf.deinit();
-    try formatIntValue(value, "", FormatOptions{}, &buf, @TypeOf(std.ArrayList(u8).appendSlice).ReturnType.ErrorSet, std.ArrayList(u8).appendSlice);
-    std.testing.expect(mem.eql(u8, buf.toSliceConst(), "123456789123456789"));
+    var buf: [20]u8 = undefined;
+    var fbs = std.io.fixedBufferStream(&buf);
+    try formatIntValue(value, "", FormatOptions{}, fbs.outStream());
+    std.testing.expect(mem.eql(u8, fbs.getWritten(), "123456789123456789"));
 }
 
 test "formatType max_depth" {
@@ -1659,12 +1588,10 @@ test "formatType max_depth" {
             self: SelfType,
             comptime fmt: []const u8,
             options: FormatOptions,
-            context: var,
-            comptime Errors: type,
-            comptime output: fn (@TypeOf(context), []const u8) Errors!void,
-        ) Errors!void {
+            out_stream: var,
+        ) !void {
             if (fmt.len == 0) {
-                return std.fmt.format(context, Errors, output, "({d:.3},{d:.3})", .{ self.x, self.y });
+                return std.fmt.format(out_stream, "({d:.3},{d:.3})", .{ self.x, self.y });
             } else {
                 @compileError("Unknown format string: '" ++ fmt ++ "'");
             }
@@ -1698,25 +1625,22 @@ test "formatType max_depth" {
     inst.a = &inst;
     inst.tu.ptr = &inst.tu;
 
-    var buf0 = std.ArrayList(u8).init(std.testing.allocator);
-    defer buf0.deinit();
-    try formatType(inst, "", FormatOptions{}, &buf0, @TypeOf(std.ArrayList(u8).appendSlice).ReturnType.ErrorSet, std.ArrayList(u8).appendSlice, 0);
-    std.testing.expect(mem.eql(u8, buf0.toSlice(), "S{ ... }"));
+    var buf: [1000]u8 = undefined;
+    var fbs = std.io.fixedBufferStream(&buf);
+    try formatType(inst, "", FormatOptions{}, fbs.outStream(), 0);
+    std.testing.expect(mem.eql(u8, fbs.getWritten(), "S{ ... }"));
 
-    var buf1 = std.ArrayList(u8).init(std.testing.allocator);
-    defer buf1.deinit();
-    try formatType(inst, "", FormatOptions{}, &buf1, @TypeOf(std.ArrayList(u8).appendSlice).ReturnType.ErrorSet, std.ArrayList(u8).appendSlice, 1);
-    std.testing.expect(mem.eql(u8, buf1.toSlice(), "S{ .a = S{ ... }, .tu = TU{ ... }, .e = E.Two, .vec = (10.200,2.220) }"));
+    fbs.reset();
+    try formatType(inst, "", FormatOptions{}, fbs.outStream(), 1);
+    std.testing.expect(mem.eql(u8, fbs.getWritten(), "S{ .a = S{ ... }, .tu = TU{ ... }, .e = E.Two, .vec = (10.200,2.220) }"));
 
-    var buf2 = std.ArrayList(u8).init(std.testing.allocator);
-    defer buf2.deinit();
-    try formatType(inst, "", FormatOptions{}, &buf2, @TypeOf(std.ArrayList(u8).appendSlice).ReturnType.ErrorSet, std.ArrayList(u8).appendSlice, 2);
-    std.testing.expect(mem.eql(u8, buf2.toSlice(), "S{ .a = S{ .a = S{ ... }, .tu = TU{ ... }, .e = E.Two, .vec = (10.200,2.220) }, .tu = TU{ .ptr = TU{ ... } }, .e = E.Two, .vec = (10.200,2.220) }"));
+    fbs.reset();
+    try formatType(inst, "", FormatOptions{}, fbs.outStream(), 2);
+    std.testing.expect(mem.eql(u8, fbs.getWritten(), "S{ .a = S{ .a = S{ ... }, .tu = TU{ ... }, .e = E.Two, .vec = (10.200,2.220) }, .tu = TU{ .ptr = TU{ ... } }, .e = E.Two, .vec = (10.200,2.220) }"));
 
-    var buf3 = std.ArrayList(u8).init(std.testing.allocator);
-    defer buf3.deinit();
-    try formatType(inst, "", FormatOptions{}, &buf3, @TypeOf(std.ArrayList(u8).appendSlice).ReturnType.ErrorSet, std.ArrayList(u8).appendSlice, 3);
-    std.testing.expect(mem.eql(u8, buf3.toSlice(), "S{ .a = S{ .a = S{ .a = S{ ... }, .tu = TU{ ... }, .e = E.Two, .vec = (10.200,2.220) }, .tu = TU{ .ptr = TU{ ... } }, .e = E.Two, .vec = (10.200,2.220) }, .tu = TU{ .ptr = TU{ .ptr = TU{ ... } } }, .e = E.Two, .vec = (10.200,2.220) }"));
+    fbs.reset();
+    try formatType(inst, "", FormatOptions{}, fbs.outStream(), 3);
+    std.testing.expect(mem.eql(u8, fbs.getWritten(), "S{ .a = S{ .a = S{ .a = S{ ... }, .tu = TU{ ... }, .e = E.Two, .vec = (10.200,2.220) }, .tu = TU{ .ptr = TU{ ... } }, .e = E.Two, .vec = (10.200,2.220) }, .tu = TU{ .ptr = TU{ .ptr = TU{ ... } } }, .e = E.Two, .vec = (10.200,2.220) }"));
 }
 
 test "positional" {
diff --git a/lib/std/fs.zig b/lib/std/fs.zig
index 88806f69bb..de6be91f71 100644
--- a/lib/std/fs.zig
+++ b/lib/std/fs.zig
@@ -96,6 +96,7 @@ pub fn updateFile(source_path: []const u8, dest_path: []const u8) !PrevStatus {
 /// atime, and mode of the source file so that the next call to `updateFile` will not need a copy.
 /// Returns the previous status of the file before updating.
 /// If any of the directories do not exist for dest_path, they are created.
+/// TODO rework this to integrate with Dir
 pub fn updateFileMode(source_path: []const u8, dest_path: []const u8, mode: ?File.Mode) !PrevStatus {
     const my_cwd = cwd();
 
@@ -141,29 +142,25 @@ pub fn updateFileMode(source_path: []const u8, dest_path: []const u8, mode: ?Fil
 /// there is a possibility of power loss or application termination leaving temporary files present
 /// in the same directory as dest_path.
 /// Destination file will have the same mode as the source file.
+/// TODO rework this to integrate with Dir
 pub fn copyFile(source_path: []const u8, dest_path: []const u8) !void {
     var in_file = try cwd().openFile(source_path, .{});
     defer in_file.close();
 
-    const mode = try in_file.mode();
-    const in_stream = &in_file.inStream().stream;
+    const stat = try in_file.stat();
 
-    var atomic_file = try AtomicFile.init(dest_path, mode);
+    var atomic_file = try AtomicFile.init(dest_path, stat.mode);
     defer atomic_file.deinit();
 
-    var buf: [mem.page_size]u8 = undefined;
-    while (true) {
-        const amt = try in_stream.readFull(buf[0..]);
-        try atomic_file.file.write(buf[0..amt]);
-        if (amt != buf.len) {
-            return atomic_file.finish();
-        }
-    }
+    try atomic_file.file.writeFileAll(in_file, .{ .in_len = stat.size });
+    return atomic_file.finish();
 }
 
-/// Guaranteed to be atomic. However until https://patchwork.kernel.org/patch/9636735/ is
-/// merged and readily available,
+/// Guaranteed to be atomic.
+/// On Linux, until https://patchwork.kernel.org/patch/9636735/ is merged and readily available,
 /// there is a possibility of power loss or application termination leaving temporary files present
+/// in the same directory as dest_path.
+/// TODO rework this to integrate with Dir
 pub fn copyFileMode(source_path: []const u8, dest_path: []const u8, mode: File.Mode) !void {
     var in_file = try cwd().openFile(source_path, .{});
     defer in_file.close();
@@ -171,14 +168,8 @@ pub fn copyFileMode(source_path: []const u8, dest_path: []const u8, mode: File.M
     var atomic_file = try AtomicFile.init(dest_path, mode);
     defer atomic_file.deinit();
 
-    var buf: [mem.page_size * 6]u8 = undefined;
-    while (true) {
-        const amt = try in_file.read(buf[0..]);
-        try atomic_file.file.write(buf[0..amt]);
-        if (amt != buf.len) {
-            return atomic_file.finish();
-        }
-    }
+    try atomic_file.file.writeFileAll(in_file, .{});
+    return atomic_file.finish();
 }
 
 /// TODO update this API to avoid a getrandom syscall for every operation. It
@@ -266,7 +257,7 @@ const default_new_dir_mode = 0o755;
 /// Asserts that the path is absolute. See `Dir.makeDir` for a function that operates
 /// on both absolute and relative paths.
 pub fn makeDirAbsolute(absolute_path: []const u8) !void {
-    assert(path.isAbsoluteC(absolute_path));
+    assert(path.isAbsolute(absolute_path));
     return os.mkdir(absolute_path, default_new_dir_mode);
 }
 
@@ -1150,7 +1141,7 @@ pub const Dir = struct {
         const buf = try allocator.alignedAlloc(u8, A, size);
         errdefer allocator.free(buf);
 
-        try file.inStream().stream.readNoEof(buf);
+        try file.inStream().readNoEof(buf);
         return buf;
     }
 
@@ -1365,7 +1356,7 @@ pub const Dir = struct {
         else
             @as(u32, os.F_OK);
         const result = if (need_async_thread)
-            std.event.Loop.instance.?.faccessatZ(self.fd, sub_path, os_mode)
+            std.event.Loop.instance.?.faccessatZ(self.fd, sub_path, os_mode, 0)
         else
             os.faccessatZ(self.fd, sub_path, os_mode, 0);
         return result;
@@ -1669,6 +1660,8 @@ pub fn realpathAlloc(allocator: *Allocator, pathname: []const u8) ![]u8 {
 }
 
 test "" {
+    _ = makeDirAbsolute;
+    _ = makeDirAbsoluteZ;
     _ = @import("fs/path.zig");
     _ = @import("fs/file.zig");
     _ = @import("fs/get_app_data_dir.zig");
diff --git a/lib/std/fs/file.zig b/lib/std/fs/file.zig
index 5b51f19f41..c4991a81ff 100644
--- a/lib/std/fs/file.zig
+++ b/lib/std/fs/file.zig
@@ -71,7 +71,7 @@ pub const File = struct {
         if (need_async_thread and self.io_mode == .blocking and !self.async_block_allowed) {
             std.event.Loop.instance.?.close(self.handle);
         } else {
-            return os.close(self.handle);
+            os.close(self.handle);
         }
     }
 
@@ -99,6 +99,14 @@ pub const File = struct {
         return false;
     }
 
+    pub const SetEndPosError = os.TruncateError;
+
+    /// Shrinks or expands the file.
+    /// The file offset after this call is left unchanged.
+    pub fn setEndPos(self: File, length: u64) SetEndPosError!void {
+        try os.ftruncate(self.handle, length);
+    }
+
     pub const SeekError = os.SeekError;
 
     /// Repositions read/write file offset relative to the current offset.
@@ -145,6 +153,16 @@ pub const File = struct {
     }
 
     pub const Stat = struct {
+        /// A number that the system uses to point to the file metadata. This number is not guaranteed to be
+        /// unique across time, as some file systems may reuse an inode after it's file has been deleted.
+        /// Some systems may change the inode of a file over time.
+        ///
+        /// On Linux, the inode _is_ structure that stores the metadata, and the inode _number_ is what
+        /// you see here: the index number of the inode.
+        ///
+        /// The FileIndex on Windows is similar. It is a number for a file that is unique to each filesystem.
+        inode: os.ino_t,
+
         size: u64,
         mode: Mode,
 
@@ -174,6 +192,7 @@ pub const File = struct {
                 else => return windows.unexpectedStatus(rc),
             }
             return Stat{
+                .inode = info.InternalInformation.IndexNumber,
                 .size = @bitCast(u64, info.StandardInformation.EndOfFile),
                 .mode = 0,
                 .atime = windows.fromSysTime(info.BasicInformation.LastAccessTime),
@@ -187,6 +206,7 @@ pub const File = struct {
         const mtime = st.mtime();
         const ctime = st.ctime();
         return Stat{
+            .inode = st.ino,
             .size = @bitCast(u64, st.size),
             .mode = st.mode,
             .atime = @as(i64, atime.tv_sec) * std.time.ns_per_s + atime.tv_nsec,
@@ -238,11 +258,16 @@ pub const File = struct {
         }
     }
 
-    pub fn readAll(self: File, buffer: []u8) ReadError!void {
+    /// Returns the number of bytes read. If the number read is smaller than `buffer.len`, it
+    /// means the file reached the end. Reaching the end of a file is not an error condition.
+    pub fn readAll(self: File, buffer: []u8) ReadError!usize {
         var index: usize = 0;
-        while (index < buffer.len) {
-            index += try self.read(buffer[index..]);
+        while (index != buffer.len) {
+            const amt = try self.read(buffer[index..]);
+            if (amt == 0) break;
+            index += amt;
         }
+        return index;
     }
 
     pub fn pread(self: File, buffer: []u8, offset: u64) PReadError!usize {
@@ -253,11 +278,16 @@ pub const File = struct {
         }
     }
 
-    pub fn preadAll(self: File, buffer: []u8, offset: u64) PReadError!void {
+    /// Returns the number of bytes read. If the number read is smaller than `buffer.len`, it
+    /// means the file reached the end. Reaching the end of a file is not an error condition.
+    pub fn preadAll(self: File, buffer: []u8, offset: u64) PReadError!usize {
         var index: usize = 0;
-        while (index < buffer.len) {
-            index += try self.pread(buffer[index..], offset + index);
+        while (index != buffer.len) {
+            const amt = try self.pread(buffer[index..], offset + index);
+            if (amt == 0) break;
+            index += amt;
         }
+        return index;
     }
 
     pub fn readv(self: File, iovecs: []const os.iovec) ReadError!usize {
@@ -268,19 +298,27 @@ pub const File = struct {
         }
     }
 
+    /// Returns the number of bytes read. If the number read is smaller than the total bytes
+    /// from all the buffers, it means the file reached the end. Reaching the end of a file
+    /// is not an error condition.
     /// The `iovecs` parameter is mutable because this function needs to mutate the fields in
     /// order to handle partial reads from the underlying OS layer.
-    pub fn readvAll(self: File, iovecs: []os.iovec) ReadError!void {
+    pub fn readvAll(self: File, iovecs: []os.iovec) ReadError!usize {
         if (iovecs.len == 0) return;
 
         var i: usize = 0;
+        var off: usize = 0;
         while (true) {
             var amt = try self.readv(iovecs[i..]);
+            var eof = amt == 0;
+            off += amt;
             while (amt >= iovecs[i].iov_len) {
                 amt -= iovecs[i].iov_len;
                 i += 1;
-                if (i >= iovecs.len) return;
+                if (i >= iovecs.len) return off;
+                eof = false;
             }
+            if (eof) return off;
             iovecs[i].iov_base += amt;
             iovecs[i].iov_len -= amt;
         }
@@ -294,6 +332,9 @@ pub const File = struct {
         }
     }
 
+    /// Returns the number of bytes read. If the number read is smaller than the total bytes
+    /// from all the buffers, it means the file reached the end. Reaching the end of a file
+    /// is not an error condition.
     /// The `iovecs` parameter is mutable because this function needs to mutate the fields in
     /// order to handle partial reads from the underlying OS layer.
     pub fn preadvAll(self: File, iovecs: []const os.iovec, offset: u64) PReadError!void {
@@ -303,12 +344,15 @@ pub const File = struct {
         var off: usize = 0;
         while (true) {
             var amt = try self.preadv(iovecs[i..], offset + off);
+            var eof = amt == 0;
             off += amt;
             while (amt >= iovecs[i].iov_len) {
                 amt -= iovecs[i].iov_len;
                 i += 1;
-                if (i >= iovecs.len) return;
+                if (i >= iovecs.len) return off;
+                eof = false;
             }
+            if (eof) return off;
             iovecs[i].iov_base += amt;
             iovecs[i].iov_len -= amt;
         }
@@ -484,85 +528,29 @@ pub const File = struct {
         }
     }
 
-    pub fn inStream(file: File) InStream {
-        return InStream{
-            .file = file,
-            .stream = InStream.Stream{ .readFn = InStream.readFn },
-        };
+    pub const InStream = io.InStream(File, ReadError, read);
+
+    pub fn inStream(file: File) io.InStream(File, ReadError, read) {
+        return .{ .context = file };
     }
 
+    pub const OutStream = io.OutStream(File, WriteError, write);
+
     pub fn outStream(file: File) OutStream {
-        return OutStream{
-            .file = file,
-            .stream = OutStream.Stream{ .writeFn = OutStream.writeFn },
-        };
+        return .{ .context = file };
     }
 
+    pub const SeekableStream = io.SeekableStream(
+        File,
+        SeekError,
+        GetPosError,
+        seekTo,
+        seekBy,
+        getPos,
+        getEndPos,
+    );
+
     pub fn seekableStream(file: File) SeekableStream {
-        return SeekableStream{
-            .file = file,
-            .stream = SeekableStream.Stream{
-                .seekToFn = SeekableStream.seekToFn,
-                .seekByFn = SeekableStream.seekByFn,
-                .getPosFn = SeekableStream.getPosFn,
-                .getEndPosFn = SeekableStream.getEndPosFn,
-            },
-        };
+        return .{ .context = file };
     }
-
-    /// Implementation of io.InStream trait for File
-    pub const InStream = struct {
-        file: File,
-        stream: Stream,
-
-        pub const Error = ReadError;
-        pub const Stream = io.InStream(Error);
-
-        fn readFn(in_stream: *Stream, buffer: []u8) Error!usize {
-            const self = @fieldParentPtr(InStream, "stream", in_stream);
-            return self.file.read(buffer);
-        }
-    };
-
-    /// Implementation of io.OutStream trait for File
-    pub const OutStream = struct {
-        file: File,
-        stream: Stream,
-
-        pub const Error = WriteError;
-        pub const Stream = io.OutStream(Error);
-
-        fn writeFn(out_stream: *Stream, bytes: []const u8) Error!usize {
-            const self = @fieldParentPtr(OutStream, "stream", out_stream);
-            return self.file.write(bytes);
-        }
-    };
-
-    /// Implementation of io.SeekableStream trait for File
-    pub const SeekableStream = struct {
-        file: File,
-        stream: Stream,
-
-        pub const Stream = io.SeekableStream(SeekError, GetPosError);
-
-        pub fn seekToFn(seekable_stream: *Stream, pos: u64) SeekError!void {
-            const self = @fieldParentPtr(SeekableStream, "stream", seekable_stream);
-            return self.file.seekTo(pos);
-        }
-
-        pub fn seekByFn(seekable_stream: *Stream, amt: i64) SeekError!void {
-            const self = @fieldParentPtr(SeekableStream, "stream", seekable_stream);
-            return self.file.seekBy(amt);
-        }
-
-        pub fn getEndPosFn(seekable_stream: *Stream) GetPosError!u64 {
-            const self = @fieldParentPtr(SeekableStream, "stream", seekable_stream);
-            return self.file.getEndPos();
-        }
-
-        pub fn getPosFn(seekable_stream: *Stream) GetPosError!u64 {
-            const self = @fieldParentPtr(SeekableStream, "stream", seekable_stream);
-            return self.file.getPos();
-        }
-    };
 };
diff --git a/lib/std/heap.zig b/lib/std/heap.zig
index 65809e97b4..8c79249d4b 100644
--- a/lib/std/heap.zig
+++ b/lib/std/heap.zig
@@ -10,6 +10,7 @@ const c = std.c;
 const maxInt = std.math.maxInt;
 
 pub const LoggingAllocator = @import("heap/logging_allocator.zig").LoggingAllocator;
+pub const loggingAllocator = @import("heap/logging_allocator.zig").loggingAllocator;
 
 const Allocator = mem.Allocator;
 
diff --git a/lib/std/heap/logging_allocator.zig b/lib/std/heap/logging_allocator.zig
index 7dce7bc20a..0d15986a76 100644
--- a/lib/std/heap/logging_allocator.zig
+++ b/lib/std/heap/logging_allocator.zig
@@ -1,63 +1,69 @@
 const std = @import("../std.zig");
 const Allocator = std.mem.Allocator;
 
-const AnyErrorOutStream = std.io.OutStream(anyerror);
-
 /// This allocator is used in front of another allocator and logs to the provided stream
 /// on every call to the allocator. Stream errors are ignored.
 /// If https://github.com/ziglang/zig/issues/2586 is implemented, this API can be improved.
-pub const LoggingAllocator = struct {
-    allocator: Allocator,
+pub fn LoggingAllocator(comptime OutStreamType: type) type {
+    return struct {
+        allocator: Allocator,
+        parent_allocator: *Allocator,
+        out_stream: OutStreamType,
+
+        const Self = @This();
+
+        pub fn init(parent_allocator: *Allocator, out_stream: OutStreamType) Self {
+            return Self{
+                .allocator = Allocator{
+                    .reallocFn = realloc,
+                    .shrinkFn = shrink,
+                },
+                .parent_allocator = parent_allocator,
+                .out_stream = out_stream,
+            };
+        }
+
+        fn realloc(allocator: *Allocator, old_mem: []u8, old_align: u29, new_size: usize, new_align: u29) ![]u8 {
+            const self = @fieldParentPtr(Self, "allocator", allocator);
+            if (old_mem.len == 0) {
+                self.out_stream.print("allocation of {} ", .{new_size}) catch {};
+            } else {
+                self.out_stream.print("resize from {} to {} ", .{ old_mem.len, new_size }) catch {};
+            }
+            const result = self.parent_allocator.reallocFn(self.parent_allocator, old_mem, old_align, new_size, new_align);
+            if (result) |buff| {
+                self.out_stream.print("success!\n", .{}) catch {};
+            } else |err| {
+                self.out_stream.print("failure!\n", .{}) catch {};
+            }
+            return result;
+        }
+
+        fn shrink(allocator: *Allocator, old_mem: []u8, old_align: u29, new_size: usize, new_align: u29) []u8 {
+            const self = @fieldParentPtr(Self, "allocator", allocator);
+            const result = self.parent_allocator.shrinkFn(self.parent_allocator, old_mem, old_align, new_size, new_align);
+            if (new_size == 0) {
+                self.out_stream.print("free of {} bytes success!\n", .{old_mem.len}) catch {};
+            } else {
+                self.out_stream.print("shrink from {} bytes to {} bytes success!\n", .{ old_mem.len, new_size }) catch {};
+            }
+            return result;
+        }
+    };
+}
+
+pub fn loggingAllocator(
     parent_allocator: *Allocator,
-    out_stream: *AnyErrorOutStream,
-
-    const Self = @This();
-
-    pub fn init(parent_allocator: *Allocator, out_stream: *AnyErrorOutStream) Self {
-        return Self{
-            .allocator = Allocator{
-                .reallocFn = realloc,
-                .shrinkFn = shrink,
-            },
-            .parent_allocator = parent_allocator,
-            .out_stream = out_stream,
-        };
-    }
-
-    fn realloc(allocator: *Allocator, old_mem: []u8, old_align: u29, new_size: usize, new_align: u29) ![]u8 {
-        const self = @fieldParentPtr(Self, "allocator", allocator);
-        if (old_mem.len == 0) {
-            self.out_stream.print("allocation of {} ", .{new_size}) catch {};
-        } else {
-            self.out_stream.print("resize from {} to {} ", .{ old_mem.len, new_size }) catch {};
-        }
-        const result = self.parent_allocator.reallocFn(self.parent_allocator, old_mem, old_align, new_size, new_align);
-        if (result) |buff| {
-            self.out_stream.print("success!\n", .{}) catch {};
-        } else |err| {
-            self.out_stream.print("failure!\n", .{}) catch {};
-        }
-        return result;
-    }
-
-    fn shrink(allocator: *Allocator, old_mem: []u8, old_align: u29, new_size: usize, new_align: u29) []u8 {
-        const self = @fieldParentPtr(Self, "allocator", allocator);
-        const result = self.parent_allocator.shrinkFn(self.parent_allocator, old_mem, old_align, new_size, new_align);
-        if (new_size == 0) {
-            self.out_stream.print("free of {} bytes success!\n", .{old_mem.len}) catch {};
-        } else {
-            self.out_stream.print("shrink from {} bytes to {} bytes success!\n", .{ old_mem.len, new_size }) catch {};
-        }
-        return result;
-    }
-};
+    out_stream: var,
+) LoggingAllocator(@TypeOf(out_stream)) {
+    return LoggingAllocator(@TypeOf(out_stream)).init(parent_allocator, out_stream);
+}
 
 test "LoggingAllocator" {
     var buf: [255]u8 = undefined;
-    var slice_stream = std.io.SliceOutStream.init(buf[0..]);
-    const stream = &slice_stream.stream;
+    var fbs = std.io.fixedBufferStream(&buf);
 
-    const allocator = &LoggingAllocator.init(std.testing.allocator, @ptrCast(*AnyErrorOutStream, stream)).allocator;
+    const allocator = &loggingAllocator(std.testing.allocator, fbs.outStream()).allocator;
 
     const ptr = try allocator.alloc(u8, 10);
     allocator.free(ptr);
@@ -66,5 +72,5 @@ test "LoggingAllocator" {
         \\allocation of 10 success!
         \\free of 10 bytes success!
         \\
-    , slice_stream.getWritten());
+    , fbs.getWritten());
 }
diff --git a/lib/std/http/headers.zig b/lib/std/http/headers.zig
index a7a1464f99..1e1e71e3eb 100644
--- a/lib/std/http/headers.zig
+++ b/lib/std/http/headers.zig
@@ -350,15 +350,13 @@ pub const Headers = struct {
         self: Self,
         comptime fmt: []const u8,
         options: std.fmt.FormatOptions,
-        context: var,
-        comptime Errors: type,
-        output: fn (@TypeOf(context), []const u8) Errors!void,
-    ) Errors!void {
+        out_stream: var,
+    ) !void {
         for (self.toSlice()) |entry| {
-            try output(context, entry.name);
-            try output(context, ": ");
-            try output(context, entry.value);
-            try output(context, "\n");
+            try out_stream.writeAll(entry.name);
+            try out_stream.writeAll(": ");
+            try out_stream.writeAll(entry.value);
+            try out_stream.writeAll("\n");
         }
     }
 };
diff --git a/lib/std/io.zig b/lib/std/io.zig
index 99e9391f1d..243dd5ca95 100644
--- a/lib/std/io.zig
+++ b/lib/std/io.zig
@@ -4,17 +4,13 @@ const root = @import("root");
 const c = std.c;
 
 const math = std.math;
-const debug = std.debug;
-const assert = debug.assert;
+const assert = std.debug.assert;
 const os = std.os;
 const fs = std.fs;
 const mem = std.mem;
 const meta = std.meta;
 const trait = meta.trait;
-const Buffer = std.Buffer;
-const fmt = std.fmt;
 const File = std.fs.File;
-const testing = std.testing;
 
 pub const Mode = enum {
     /// I/O operates normally, waiting for the operating system syscalls to complete.
@@ -92,11 +88,45 @@ pub fn getStdIn() File {
     };
 }
 
-pub const SeekableStream = @import("io/seekable_stream.zig").SeekableStream;
-pub const SliceSeekableInStream = @import("io/seekable_stream.zig").SliceSeekableInStream;
-pub const COutStream = @import("io/c_out_stream.zig").COutStream;
 pub const InStream = @import("io/in_stream.zig").InStream;
 pub const OutStream = @import("io/out_stream.zig").OutStream;
+pub const SeekableStream = @import("io/seekable_stream.zig").SeekableStream;
+
+pub const BufferedOutStream = @import("io/buffered_out_stream.zig").BufferedOutStream;
+pub const bufferedOutStream = @import("io/buffered_out_stream.zig").bufferedOutStream;
+
+pub const BufferedInStream = @import("io/buffered_in_stream.zig").BufferedInStream;
+pub const bufferedInStream = @import("io/buffered_in_stream.zig").bufferedInStream;
+
+pub const PeekStream = @import("io/peek_stream.zig").PeekStream;
+pub const peekStream = @import("io/peek_stream.zig").peekStream;
+
+pub const FixedBufferStream = @import("io/fixed_buffer_stream.zig").FixedBufferStream;
+pub const fixedBufferStream = @import("io/fixed_buffer_stream.zig").fixedBufferStream;
+
+pub const COutStream = @import("io/c_out_stream.zig").COutStream;
+pub const cOutStream = @import("io/c_out_stream.zig").cOutStream;
+
+pub const CountingOutStream = @import("io/counting_out_stream.zig").CountingOutStream;
+pub const countingOutStream = @import("io/counting_out_stream.zig").countingOutStream;
+
+pub const BitInStream = @import("io/bit_in_stream.zig").BitInStream;
+pub const bitInStream = @import("io/bit_in_stream.zig").bitInStream;
+
+pub const BitOutStream = @import("io/bit_out_stream.zig").BitOutStream;
+pub const bitOutStream = @import("io/bit_out_stream.zig").bitOutStream;
+
+pub const Packing = @import("io/serialization.zig").Packing;
+
+pub const Serializer = @import("io/serialization.zig").Serializer;
+pub const serializer = @import("io/serialization.zig").serializer;
+
+pub const Deserializer = @import("io/serialization.zig").Deserializer;
+pub const deserializer = @import("io/serialization.zig").deserializer;
+
+pub const BufferedAtomicFile = @import("io/buffered_atomic_file.zig").BufferedAtomicFile;
+
+pub const StreamSource = @import("io/stream_source.zig").StreamSource;
 
 /// Deprecated; use `std.fs.Dir.writeFile`.
 pub fn writeFile(path: []const u8, data: []const u8) !void {
@@ -108,1029 +138,18 @@ pub fn readFileAlloc(allocator: *mem.Allocator, path: []const u8) ![]u8 {
     return fs.cwd().readFileAlloc(allocator, path, math.maxInt(usize));
 }
 
-pub fn BufferedInStream(comptime Error: type) type {
-    return BufferedInStreamCustom(mem.page_size, Error);
-}
-
-pub fn BufferedInStreamCustom(comptime buffer_size: usize, comptime Error: type) type {
-    return struct {
-        const Self = @This();
-        const Stream = InStream(Error);
-
-        stream: Stream,
-
-        unbuffered_in_stream: *Stream,
-
-        const FifoType = std.fifo.LinearFifo(u8, std.fifo.LinearFifoBufferType{ .Static = buffer_size });
-        fifo: FifoType,
-
-        pub fn init(unbuffered_in_stream: *Stream) Self {
-            return Self{
-                .unbuffered_in_stream = unbuffered_in_stream,
-                .fifo = FifoType.init(),
-                .stream = Stream{ .readFn = readFn },
-            };
-        }
-
-        fn readFn(in_stream: *Stream, dest: []u8) !usize {
-            const self = @fieldParentPtr(Self, "stream", in_stream);
-            var dest_index: usize = 0;
-            while (dest_index < dest.len) {
-                const written = self.fifo.read(dest[dest_index..]);
-                if (written == 0) {
-                    // fifo empty, fill it
-                    const writable = self.fifo.writableSlice(0);
-                    assert(writable.len > 0);
-                    const n = try self.unbuffered_in_stream.read(writable);
-                    if (n == 0) {
-                        // reading from the unbuffered stream returned nothing
-                        // so we have nothing left to read.
-                        return dest_index;
-                    }
-                    self.fifo.update(n);
-                }
-                dest_index += written;
-            }
-            return dest.len;
-        }
-    };
-}
-
-test "io.BufferedInStream" {
-    const OneByteReadInStream = struct {
-        const Error = error{NoError};
-        const Stream = InStream(Error);
-
-        stream: Stream,
-        str: []const u8,
-        curr: usize,
-
-        fn init(str: []const u8) @This() {
-            return @This(){
-                .stream = Stream{ .readFn = readFn },
-                .str = str,
-                .curr = 0,
-            };
-        }
-
-        fn readFn(in_stream: *Stream, dest: []u8) Error!usize {
-            const self = @fieldParentPtr(@This(), "stream", in_stream);
-            if (self.str.len <= self.curr or dest.len == 0)
-                return 0;
-
-            dest[0] = self.str[self.curr];
-            self.curr += 1;
-            return 1;
-        }
-    };
-
-    const str = "This is a test";
-    var one_byte_stream = OneByteReadInStream.init(str);
-    var buf_in_stream = BufferedInStream(OneByteReadInStream.Error).init(&one_byte_stream.stream);
-    const stream = &buf_in_stream.stream;
-
-    const res = try stream.readAllAlloc(testing.allocator, str.len + 1);
-    defer testing.allocator.free(res);
-    testing.expectEqualSlices(u8, str, res);
-}
-
-/// Creates a stream which supports 'un-reading' data, so that it can be read again.
-/// This makes look-ahead style parsing much easier.
-pub fn PeekStream(comptime buffer_type: std.fifo.LinearFifoBufferType, comptime InStreamError: type) type {
-    return struct {
-        const Self = @This();
-        pub const Error = InStreamError;
-        pub const Stream = InStream(Error);
-
-        stream: Stream,
-        base: *Stream,
-
-        const FifoType = std.fifo.LinearFifo(u8, buffer_type);
-        fifo: FifoType,
-
-        pub usingnamespace switch (buffer_type) {
-            .Static => struct {
-                pub fn init(base: *Stream) Self {
-                    return .{
-                        .base = base,
-                        .fifo = FifoType.init(),
-                        .stream = Stream{ .readFn = readFn },
-                    };
-                }
-            },
-            .Slice => struct {
-                pub fn init(base: *Stream, buf: []u8) Self {
-                    return .{
-                        .base = base,
-                        .fifo = FifoType.init(buf),
-                        .stream = Stream{ .readFn = readFn },
-                    };
-                }
-            },
-            .Dynamic => struct {
-                pub fn init(base: *Stream, allocator: *mem.Allocator) Self {
-                    return .{
-                        .base = base,
-                        .fifo = FifoType.init(allocator),
-                        .stream = Stream{ .readFn = readFn },
-                    };
-                }
-            },
-        };
-
-        pub fn putBackByte(self: *Self, byte: u8) !void {
-            try self.putBack(&[_]u8{byte});
-        }
-
-        pub fn putBack(self: *Self, bytes: []const u8) !void {
-            try self.fifo.unget(bytes);
-        }
-
-        fn readFn(in_stream: *Stream, dest: []u8) Error!usize {
-            const self = @fieldParentPtr(Self, "stream", in_stream);
-
-            // copy over anything putBack()'d
-            var dest_index = self.fifo.read(dest);
-            if (dest_index == dest.len) return dest_index;
-
-            // ask the backing stream for more
-            dest_index += try self.base.read(dest[dest_index..]);
-            return dest_index;
-        }
-    };
-}
-
-pub const SliceInStream = struct {
-    const Self = @This();
-    pub const Error = error{};
-    pub const Stream = InStream(Error);
-
-    stream: Stream,
-
-    pos: usize,
-    slice: []const u8,
-
-    pub fn init(slice: []const u8) Self {
-        return Self{
-            .slice = slice,
-            .pos = 0,
-            .stream = Stream{ .readFn = readFn },
-        };
-    }
-
-    fn readFn(in_stream: *Stream, dest: []u8) Error!usize {
-        const self = @fieldParentPtr(Self, "stream", in_stream);
-        const size = math.min(dest.len, self.slice.len - self.pos);
-        const end = self.pos + size;
-
-        mem.copy(u8, dest[0..size], self.slice[self.pos..end]);
-        self.pos = end;
-
-        return size;
-    }
-};
-
-/// Creates a stream which allows for reading bit fields from another stream
-pub fn BitInStream(endian: builtin.Endian, comptime Error: type) type {
-    return struct {
-        const Self = @This();
-
-        in_stream: *Stream,
-        bit_buffer: u7,
-        bit_count: u3,
-        stream: Stream,
-
-        pub const Stream = InStream(Error);
-        const u8_bit_count = comptime meta.bitCount(u8);
-        const u7_bit_count = comptime meta.bitCount(u7);
-        const u4_bit_count = comptime meta.bitCount(u4);
-
-        pub fn init(in_stream: *Stream) Self {
-            return Self{
-                .in_stream = in_stream,
-                .bit_buffer = 0,
-                .bit_count = 0,
-                .stream = Stream{ .readFn = read },
-            };
-        }
-
-        /// Reads `bits` bits from the stream and returns a specified unsigned int type
-        ///  containing them in the least significant end, returning an error if the
-        ///  specified number of bits could not be read.
-        pub fn readBitsNoEof(self: *Self, comptime U: type, bits: usize) !U {
-            var n: usize = undefined;
-            const result = try self.readBits(U, bits, &n);
-            if (n < bits) return error.EndOfStream;
-            return result;
-        }
-
-        /// Reads `bits` bits from the stream and returns a specified unsigned int type
-        ///  containing them in the least significant end. The number of bits successfully
-        ///  read is placed in `out_bits`, as reaching the end of the stream is not an error.
-        pub fn readBits(self: *Self, comptime U: type, bits: usize, out_bits: *usize) Error!U {
-            comptime assert(trait.isUnsignedInt(U));
-
-            //by extending the buffer to a minimum of u8 we can cover a number of edge cases
-            // related to shifting and casting.
-            const u_bit_count = comptime meta.bitCount(U);
-            const buf_bit_count = bc: {
-                assert(u_bit_count >= bits);
-                break :bc if (u_bit_count <= u8_bit_count) u8_bit_count else u_bit_count;
-            };
-            const Buf = std.meta.IntType(false, buf_bit_count);
-            const BufShift = math.Log2Int(Buf);
-
-            out_bits.* = @as(usize, 0);
-            if (U == u0 or bits == 0) return 0;
-            var out_buffer = @as(Buf, 0);
-
-            if (self.bit_count > 0) {
-                const n = if (self.bit_count >= bits) @intCast(u3, bits) else self.bit_count;
-                const shift = u7_bit_count - n;
-                switch (endian) {
-                    .Big => {
-                        out_buffer = @as(Buf, self.bit_buffer >> shift);
-                        self.bit_buffer <<= n;
-                    },
-                    .Little => {
-                        const value = (self.bit_buffer << shift) >> shift;
-                        out_buffer = @as(Buf, value);
-                        self.bit_buffer >>= n;
-                    },
-                }
-                self.bit_count -= n;
-                out_bits.* = n;
-            }
-            //at this point we know bit_buffer is empty
-
-            //copy bytes until we have enough bits, then leave the rest in bit_buffer
-            while (out_bits.* < bits) {
-                const n = bits - out_bits.*;
-                const next_byte = self.in_stream.readByte() catch |err| {
-                    if (err == error.EndOfStream) {
-                        return @intCast(U, out_buffer);
-                    }
-                    //@BUG: See #1810. Not sure if the bug is that I have to do this for some
-                    // streams, or that I don't for streams with emtpy errorsets.
-                    return @errSetCast(Error, err);
-                };
-
-                switch (endian) {
-                    .Big => {
-                        if (n >= u8_bit_count) {
-                            out_buffer <<= @intCast(u3, u8_bit_count - 1);
-                            out_buffer <<= 1;
-                            out_buffer |= @as(Buf, next_byte);
-                            out_bits.* += u8_bit_count;
-                            continue;
-                        }
-
-                        const shift = @intCast(u3, u8_bit_count - n);
-                        out_buffer <<= @intCast(BufShift, n);
-                        out_buffer |= @as(Buf, next_byte >> shift);
-                        out_bits.* += n;
-                        self.bit_buffer = @truncate(u7, next_byte << @intCast(u3, n - 1));
-                        self.bit_count = shift;
-                    },
-                    .Little => {
-                        if (n >= u8_bit_count) {
-                            out_buffer |= @as(Buf, next_byte) << @intCast(BufShift, out_bits.*);
-                            out_bits.* += u8_bit_count;
-                            continue;
-                        }
-
-                        const shift = @intCast(u3, u8_bit_count - n);
-                        const value = (next_byte << shift) >> shift;
-                        out_buffer |= @as(Buf, value) << @intCast(BufShift, out_bits.*);
-                        out_bits.* += n;
-                        self.bit_buffer = @truncate(u7, next_byte >> @intCast(u3, n));
-                        self.bit_count = shift;
-                    },
-                }
-            }
-
-            return @intCast(U, out_buffer);
-        }
-
-        pub fn alignToByte(self: *Self) void {
-            self.bit_buffer = 0;
-            self.bit_count = 0;
-        }
-
-        pub fn read(self_stream: *Stream, buffer: []u8) Error!usize {
-            var self = @fieldParentPtr(Self, "stream", self_stream);
-
-            var out_bits: usize = undefined;
-            var out_bits_total = @as(usize, 0);
-            //@NOTE: I'm not sure this is a good idea, maybe alignToByte should be forced
-            if (self.bit_count > 0) {
-                for (buffer) |*b, i| {
-                    b.* = try self.readBits(u8, u8_bit_count, &out_bits);
-                    out_bits_total += out_bits;
-                }
-                const incomplete_byte = @boolToInt(out_bits_total % u8_bit_count > 0);
-                return (out_bits_total / u8_bit_count) + incomplete_byte;
-            }
-
-            return self.in_stream.read(buffer);
-        }
-    };
-}
-
-/// This is a simple OutStream that writes to a fixed buffer. If the returned number
-/// of bytes written is less than requested, the buffer is full.
-/// Returns error.OutOfMemory when no bytes would be written.
-pub const SliceOutStream = struct {
-    pub const Error = error{OutOfMemory};
-    pub const Stream = OutStream(Error);
-
-    stream: Stream,
-
-    pos: usize,
-    slice: []u8,
-
-    pub fn init(slice: []u8) SliceOutStream {
-        return SliceOutStream{
-            .slice = slice,
-            .pos = 0,
-            .stream = Stream{ .writeFn = writeFn },
-        };
-    }
-
-    pub fn getWritten(self: *const SliceOutStream) []const u8 {
-        return self.slice[0..self.pos];
-    }
-
-    pub fn reset(self: *SliceOutStream) void {
-        self.pos = 0;
-    }
-
-    fn writeFn(out_stream: *Stream, bytes: []const u8) Error!usize {
-        const self = @fieldParentPtr(SliceOutStream, "stream", out_stream);
-
-        if (bytes.len == 0) return 0;
-
-        assert(self.pos <= self.slice.len);
-
-        const n = if (self.pos + bytes.len <= self.slice.len)
-            bytes.len
-        else
-            self.slice.len - self.pos;
-
-        std.mem.copy(u8, self.slice[self.pos .. self.pos + n], bytes[0..n]);
-        self.pos += n;
-
-        if (n == 0) return error.OutOfMemory;
-
-        return n;
-    }
-};
-
-test "io.SliceOutStream" {
-    var buf: [255]u8 = undefined;
-    var slice_stream = SliceOutStream.init(buf[0..]);
-    const stream = &slice_stream.stream;
-
-    try stream.print("{}{}!", .{ "Hello", "World" });
-    testing.expectEqualSlices(u8, "HelloWorld!", slice_stream.getWritten());
-}
-
-var null_out_stream_state = NullOutStream.init();
-pub const null_out_stream = &null_out_stream_state.stream;
-
 /// An OutStream that doesn't write to anything.
-pub const NullOutStream = struct {
-    pub const Error = error{};
-    pub const Stream = OutStream(Error);
+pub const null_out_stream = @as(NullOutStream, .{ .context = {} });
 
-    stream: Stream,
-
-    pub fn init() NullOutStream {
-        return NullOutStream{
-            .stream = Stream{ .writeFn = writeFn },
-        };
-    }
-
-    fn writeFn(out_stream: *Stream, bytes: []const u8) Error!usize {
-        return bytes.len;
-    }
-};
-
-test "io.NullOutStream" {
-    var null_stream = NullOutStream.init();
-    const stream = &null_stream.stream;
-    stream.write("yay" ** 10000) catch unreachable;
+const NullOutStream = OutStream(void, error{}, dummyWrite);
+fn dummyWrite(context: void, data: []const u8) error{}!usize {
+    return data.len;
 }
 
-/// An OutStream that counts how many bytes has been written to it.
-pub fn CountingOutStream(comptime OutStreamError: type) type {
-    return struct {
-        const Self = @This();
-        pub const Stream = OutStream(Error);
-        pub const Error = OutStreamError;
-
-        stream: Stream,
-        bytes_written: u64,
-        child_stream: *Stream,
-
-        pub fn init(child_stream: *Stream) Self {
-            return Self{
-                .stream = Stream{ .writeFn = writeFn },
-                .bytes_written = 0,
-                .child_stream = child_stream,
-            };
-        }
-
-        fn writeFn(out_stream: *Stream, bytes: []const u8) OutStreamError!usize {
-            const self = @fieldParentPtr(Self, "stream", out_stream);
-            try self.child_stream.write(bytes);
-            self.bytes_written += bytes.len;
-            return bytes.len;
-        }
-    };
+test "null_out_stream" {
+    null_out_stream.writeAll("yay" ** 10) catch |err| switch (err) {};
 }
 
-test "io.CountingOutStream" {
-    var null_stream = NullOutStream.init();
-    var counting_stream = CountingOutStream(NullOutStream.Error).init(&null_stream.stream);
-    const stream = &counting_stream.stream;
-
-    const bytes = "yay" ** 10000;
-    stream.write(bytes) catch unreachable;
-    testing.expect(counting_stream.bytes_written == bytes.len);
-}
-
-pub fn BufferedOutStream(comptime Error: type) type {
-    return BufferedOutStreamCustom(mem.page_size, Error);
-}
-
-pub fn BufferedOutStreamCustom(comptime buffer_size: usize, comptime OutStreamError: type) type {
-    return struct {
-        const Self = @This();
-        pub const Stream = OutStream(Error);
-        pub const Error = OutStreamError;
-
-        stream: Stream,
-
-        unbuffered_out_stream: *Stream,
-
-        const FifoType = std.fifo.LinearFifo(u8, std.fifo.LinearFifoBufferType{ .Static = buffer_size });
-        fifo: FifoType,
-
-        pub fn init(unbuffered_out_stream: *Stream) Self {
-            return Self{
-                .unbuffered_out_stream = unbuffered_out_stream,
-                .fifo = FifoType.init(),
-                .stream = Stream{ .writeFn = writeFn },
-            };
-        }
-
-        pub fn flush(self: *Self) !void {
-            while (true) {
-                const slice = self.fifo.readableSlice(0);
-                if (slice.len == 0) break;
-                try self.unbuffered_out_stream.write(slice);
-                self.fifo.discard(slice.len);
-            }
-        }
-
-        fn writeFn(out_stream: *Stream, bytes: []const u8) Error!usize {
-            const self = @fieldParentPtr(Self, "stream", out_stream);
-            if (bytes.len >= self.fifo.writableLength()) {
-                try self.flush();
-                return self.unbuffered_out_stream.writeOnce(bytes);
-            }
-            self.fifo.writeAssumeCapacity(bytes);
-            return bytes.len;
-        }
-    };
-}
-
-/// Implementation of OutStream trait for Buffer
-pub const BufferOutStream = struct {
-    buffer: *Buffer,
-    stream: Stream,
-
-    pub const Error = error{OutOfMemory};
-    pub const Stream = OutStream(Error);
-
-    pub fn init(buffer: *Buffer) BufferOutStream {
-        return BufferOutStream{
-            .buffer = buffer,
-            .stream = Stream{ .writeFn = writeFn },
-        };
-    }
-
-    fn writeFn(out_stream: *Stream, bytes: []const u8) !usize {
-        const self = @fieldParentPtr(BufferOutStream, "stream", out_stream);
-        try self.buffer.append(bytes);
-        return bytes.len;
-    }
-};
-
-/// Creates a stream which allows for writing bit fields to another stream
-pub fn BitOutStream(endian: builtin.Endian, comptime Error: type) type {
-    return struct {
-        const Self = @This();
-
-        out_stream: *Stream,
-        bit_buffer: u8,
-        bit_count: u4,
-        stream: Stream,
-
-        pub const Stream = OutStream(Error);
-        const u8_bit_count = comptime meta.bitCount(u8);
-        const u4_bit_count = comptime meta.bitCount(u4);
-
-        pub fn init(out_stream: *Stream) Self {
-            return Self{
-                .out_stream = out_stream,
-                .bit_buffer = 0,
-                .bit_count = 0,
-                .stream = Stream{ .writeFn = write },
-            };
-        }
-
-        /// Write the specified number of bits to the stream from the least significant bits of
-        ///  the specified unsigned int value. Bits will only be written to the stream when there
-        ///  are enough to fill a byte.
-        pub fn writeBits(self: *Self, value: var, bits: usize) Error!void {
-            if (bits == 0) return;
-
-            const U = @TypeOf(value);
-            comptime assert(trait.isUnsignedInt(U));
-
-            //by extending the buffer to a minimum of u8 we can cover a number of edge cases
-            // related to shifting and casting.
-            const u_bit_count = comptime meta.bitCount(U);
-            const buf_bit_count = bc: {
-                assert(u_bit_count >= bits);
-                break :bc if (u_bit_count <= u8_bit_count) u8_bit_count else u_bit_count;
-            };
-            const Buf = std.meta.IntType(false, buf_bit_count);
-            const BufShift = math.Log2Int(Buf);
-
-            const buf_value = @intCast(Buf, value);
-
-            const high_byte_shift = @intCast(BufShift, buf_bit_count - u8_bit_count);
-            var in_buffer = switch (endian) {
-                .Big => buf_value << @intCast(BufShift, buf_bit_count - bits),
-                .Little => buf_value,
-            };
-            var in_bits = bits;
-
-            if (self.bit_count > 0) {
-                const bits_remaining = u8_bit_count - self.bit_count;
-                const n = @intCast(u3, if (bits_remaining > bits) bits else bits_remaining);
-                switch (endian) {
-                    .Big => {
-                        const shift = @intCast(BufShift, high_byte_shift + self.bit_count);
-                        const v = @intCast(u8, in_buffer >> shift);
-                        self.bit_buffer |= v;
-                        in_buffer <<= n;
-                    },
-                    .Little => {
-                        const v = @truncate(u8, in_buffer) << @intCast(u3, self.bit_count);
-                        self.bit_buffer |= v;
-                        in_buffer >>= n;
-                    },
-                }
-                self.bit_count += n;
-                in_bits -= n;
-
-                //if we didn't fill the buffer, it's because bits < bits_remaining;
-                if (self.bit_count != u8_bit_count) return;
-                try self.out_stream.writeByte(self.bit_buffer);
-                self.bit_buffer = 0;
-                self.bit_count = 0;
-            }
-            //at this point we know bit_buffer is empty
-
-            //copy bytes until we can't fill one anymore, then leave the rest in bit_buffer
-            while (in_bits >= u8_bit_count) {
-                switch (endian) {
-                    .Big => {
-                        const v = @intCast(u8, in_buffer >> high_byte_shift);
-                        try self.out_stream.writeByte(v);
-                        in_buffer <<= @intCast(u3, u8_bit_count - 1);
-                        in_buffer <<= 1;
-                    },
-                    .Little => {
-                        const v = @truncate(u8, in_buffer);
-                        try self.out_stream.writeByte(v);
-                        in_buffer >>= @intCast(u3, u8_bit_count - 1);
-                        in_buffer >>= 1;
-                    },
-                }
-                in_bits -= u8_bit_count;
-            }
-
-            if (in_bits > 0) {
-                self.bit_count = @intCast(u4, in_bits);
-                self.bit_buffer = switch (endian) {
-                    .Big => @truncate(u8, in_buffer >> high_byte_shift),
-                    .Little => @truncate(u8, in_buffer),
-                };
-            }
-        }
-
-        /// Flush any remaining bits to the stream.
-        pub fn flushBits(self: *Self) Error!void {
-            if (self.bit_count == 0) return;
-            try self.out_stream.writeByte(self.bit_buffer);
-            self.bit_buffer = 0;
-            self.bit_count = 0;
-        }
-
-        pub fn write(self_stream: *Stream, buffer: []const u8) Error!usize {
-            var self = @fieldParentPtr(Self, "stream", self_stream);
-
-            // TODO: I'm not sure this is a good idea, maybe flushBits should be forced
-            if (self.bit_count > 0) {
-                for (buffer) |b, i|
-                    try self.writeBits(b, u8_bit_count);
-                return buffer.len;
-            }
-
-            return self.out_stream.writeOnce(buffer);
-        }
-    };
-}
-
-pub const BufferedAtomicFile = struct {
-    atomic_file: fs.AtomicFile,
-    file_stream: File.OutStream,
-    buffered_stream: BufferedOutStream(File.WriteError),
-    allocator: *mem.Allocator,
-
-    pub fn create(allocator: *mem.Allocator, dest_path: []const u8) !*BufferedAtomicFile {
-        // TODO with well defined copy elision we don't need this allocation
-        var self = try allocator.create(BufferedAtomicFile);
-        self.* = BufferedAtomicFile{
-            .atomic_file = undefined,
-            .file_stream = undefined,
-            .buffered_stream = undefined,
-            .allocator = allocator,
-        };
-        errdefer allocator.destroy(self);
-
-        self.atomic_file = try fs.AtomicFile.init(dest_path, File.default_mode);
-        errdefer self.atomic_file.deinit();
-
-        self.file_stream = self.atomic_file.file.outStream();
-        self.buffered_stream = BufferedOutStream(File.WriteError).init(&self.file_stream.stream);
-        return self;
-    }
-
-    /// always call destroy, even after successful finish()
-    pub fn destroy(self: *BufferedAtomicFile) void {
-        self.atomic_file.deinit();
-        self.allocator.destroy(self);
-    }
-
-    pub fn finish(self: *BufferedAtomicFile) !void {
-        try self.buffered_stream.flush();
-        try self.atomic_file.finish();
-    }
-
-    pub fn stream(self: *BufferedAtomicFile) *OutStream(File.WriteError) {
-        return &self.buffered_stream.stream;
-    }
-};
-
-pub const Packing = enum {
-    /// Pack data to byte alignment
-    Byte,
-
-    /// Pack data to bit alignment
-    Bit,
-};
-
-/// Creates a deserializer that deserializes types from any stream.
-///  If `is_packed` is true, the data stream is treated as bit-packed,
-///  otherwise data is expected to be packed to the smallest byte.
-///  Types may implement a custom deserialization routine with a
-///  function named `deserialize` in the form of:
-///    pub fn deserialize(self: *Self, deserializer: var) !void
-///  which will be called when the deserializer is used to deserialize
-///  that type. It will pass a pointer to the type instance to deserialize
-///  into and a pointer to the deserializer struct.
-pub fn Deserializer(comptime endian: builtin.Endian, comptime packing: Packing, comptime Error: type) type {
-    return struct {
-        const Self = @This();
-
-        in_stream: if (packing == .Bit) BitInStream(endian, Stream.Error) else *Stream,
-
-        pub const Stream = InStream(Error);
-
-        pub fn init(in_stream: *Stream) Self {
-            return Self{
-                .in_stream = switch (packing) {
-                    .Bit => BitInStream(endian, Stream.Error).init(in_stream),
-                    .Byte => in_stream,
-                },
-            };
-        }
-
-        pub fn alignToByte(self: *Self) void {
-            if (packing == .Byte) return;
-            self.in_stream.alignToByte();
-        }
-
-        //@BUG: inferred error issue. See: #1386
-        fn deserializeInt(self: *Self, comptime T: type) (Error || error{EndOfStream})!T {
-            comptime assert(trait.is(.Int)(T) or trait.is(.Float)(T));
-
-            const u8_bit_count = 8;
-            const t_bit_count = comptime meta.bitCount(T);
-
-            const U = std.meta.IntType(false, t_bit_count);
-            const Log2U = math.Log2Int(U);
-            const int_size = (U.bit_count + 7) / 8;
-
-            if (packing == .Bit) {
-                const result = try self.in_stream.readBitsNoEof(U, t_bit_count);
-                return @bitCast(T, result);
-            }
-
-            var buffer: [int_size]u8 = undefined;
-            const read_size = try self.in_stream.read(buffer[0..]);
-            if (read_size < int_size) return error.EndOfStream;
-
-            if (int_size == 1) {
-                if (t_bit_count == 8) return @bitCast(T, buffer[0]);
-                const PossiblySignedByte = std.meta.IntType(T.is_signed, 8);
-                return @truncate(T, @bitCast(PossiblySignedByte, buffer[0]));
-            }
-
-            var result = @as(U, 0);
-            for (buffer) |byte, i| {
-                switch (endian) {
-                    .Big => {
-                        result = (result << u8_bit_count) | byte;
-                    },
-                    .Little => {
-                        result |= @as(U, byte) << @intCast(Log2U, u8_bit_count * i);
-                    },
-                }
-            }
-
-            return @bitCast(T, result);
-        }
-
-        /// Deserializes and returns data of the specified type from the stream
-        pub fn deserialize(self: *Self, comptime T: type) !T {
-            var value: T = undefined;
-            try self.deserializeInto(&value);
-            return value;
-        }
-
-        /// Deserializes data into the type pointed to by `ptr`
-        pub fn deserializeInto(self: *Self, ptr: var) !void {
-            const T = @TypeOf(ptr);
-            comptime assert(trait.is(.Pointer)(T));
-
-            if (comptime trait.isSlice(T) or comptime trait.isPtrTo(.Array)(T)) {
-                for (ptr) |*v|
-                    try self.deserializeInto(v);
-                return;
-            }
-
-            comptime assert(trait.isSingleItemPtr(T));
-
-            const C = comptime meta.Child(T);
-            const child_type_id = @typeInfo(C);
-
-            //custom deserializer: fn(self: *Self, deserializer: var) !void
-            if (comptime trait.hasFn("deserialize")(C)) return C.deserialize(ptr, self);
-
-            if (comptime trait.isPacked(C) and packing != .Bit) {
-                var packed_deserializer = Deserializer(endian, .Bit, Error).init(self.in_stream);
-                return packed_deserializer.deserializeInto(ptr);
-            }
-
-            switch (child_type_id) {
-                .Void => return,
-                .Bool => ptr.* = (try self.deserializeInt(u1)) > 0,
-                .Float, .Int => ptr.* = try self.deserializeInt(C),
-                .Struct => {
-                    const info = @typeInfo(C).Struct;
-
-                    inline for (info.fields) |*field_info| {
-                        const name = field_info.name;
-                        const FieldType = field_info.field_type;
-
-                        if (FieldType == void or FieldType == u0) continue;
-
-                        //it doesn't make any sense to read pointers
-                        if (comptime trait.is(.Pointer)(FieldType)) {
-                            @compileError("Will not " ++ "read field " ++ name ++ " of struct " ++
-                                @typeName(C) ++ " because it " ++ "is of pointer-type " ++
-                                @typeName(FieldType) ++ ".");
-                        }
-
-                        try self.deserializeInto(&@field(ptr, name));
-                    }
-                },
-                .Union => {
-                    const info = @typeInfo(C).Union;
-                    if (info.tag_type) |TagType| {
-                        //we avoid duplicate iteration over the enum tags
-                        // by getting the int directly and casting it without
-                        // safety. If it is bad, it will be caught anyway.
-                        const TagInt = @TagType(TagType);
-                        const tag = try self.deserializeInt(TagInt);
-
-                        inline for (info.fields) |field_info| {
-                            if (field_info.enum_field.?.value == tag) {
-                                const name = field_info.name;
-                                const FieldType = field_info.field_type;
-                                ptr.* = @unionInit(C, name, undefined);
-                                try self.deserializeInto(&@field(ptr, name));
-                                return;
-                            }
-                        }
-                        //This is reachable if the enum data is bad
-                        return error.InvalidEnumTag;
-                    }
-                    @compileError("Cannot meaningfully deserialize " ++ @typeName(C) ++
-                        " because it is an untagged union. Use a custom deserialize().");
-                },
-                .Optional => {
-                    const OC = comptime meta.Child(C);
-                    const exists = (try self.deserializeInt(u1)) > 0;
-                    if (!exists) {
-                        ptr.* = null;
-                        return;
-                    }
-
-                    ptr.* = @as(OC, undefined); //make it non-null so the following .? is guaranteed safe
-                    const val_ptr = &ptr.*.?;
-                    try self.deserializeInto(val_ptr);
-                },
-                .Enum => {
-                    var value = try self.deserializeInt(@TagType(C));
-                    ptr.* = try meta.intToEnum(C, value);
-                },
-                else => {
-                    @compileError("Cannot deserialize " ++ @tagName(child_type_id) ++ " types (unimplemented).");
-                },
-            }
-        }
-    };
-}
-
-/// Creates a serializer that serializes types to any stream.
-///  If `is_packed` is true, the data will be bit-packed into the stream.
-///  Note that the you must call `serializer.flush()` when you are done
-///  writing bit-packed data in order ensure any unwritten bits are committed.
-///  If `is_packed` is false, data is packed to the smallest byte. In the case
-///  of packed structs, the struct will written bit-packed and with the specified
-///  endianess, after which data will resume being written at the next byte boundary.
-///  Types may implement a custom serialization routine with a
-///  function named `serialize` in the form of:
-///    pub fn serialize(self: Self, serializer: var) !void
-///  which will be called when the serializer is used to serialize that type. It will
-///  pass a const pointer to the type instance to be serialized and a pointer
-///  to the serializer struct.
-pub fn Serializer(comptime endian: builtin.Endian, comptime packing: Packing, comptime Error: type) type {
-    return struct {
-        const Self = @This();
-
-        out_stream: if (packing == .Bit) BitOutStream(endian, Stream.Error) else *Stream,
-
-        pub const Stream = OutStream(Error);
-
-        pub fn init(out_stream: *Stream) Self {
-            return Self{
-                .out_stream = switch (packing) {
-                    .Bit => BitOutStream(endian, Stream.Error).init(out_stream),
-                    .Byte => out_stream,
-                },
-            };
-        }
-
-        /// Flushes any unwritten bits to the stream
-        pub fn flush(self: *Self) Error!void {
-            if (packing == .Bit) return self.out_stream.flushBits();
-        }
-
-        fn serializeInt(self: *Self, value: var) Error!void {
-            const T = @TypeOf(value);
-            comptime assert(trait.is(.Int)(T) or trait.is(.Float)(T));
-
-            const t_bit_count = comptime meta.bitCount(T);
-            const u8_bit_count = comptime meta.bitCount(u8);
-
-            const U = std.meta.IntType(false, t_bit_count);
-            const Log2U = math.Log2Int(U);
-            const int_size = (U.bit_count + 7) / 8;
-
-            const u_value = @bitCast(U, value);
-
-            if (packing == .Bit) return self.out_stream.writeBits(u_value, t_bit_count);
-
-            var buffer: [int_size]u8 = undefined;
-            if (int_size == 1) buffer[0] = u_value;
-
-            for (buffer) |*byte, i| {
-                const idx = switch (endian) {
-                    .Big => int_size - i - 1,
-                    .Little => i,
-                };
-                const shift = @intCast(Log2U, idx * u8_bit_count);
-                const v = u_value >> shift;
-                byte.* = if (t_bit_count < u8_bit_count) v else @truncate(u8, v);
-            }
-
-            try self.out_stream.write(&buffer);
-        }
-
-        /// Serializes the passed value into the stream
-        pub fn serialize(self: *Self, value: var) Error!void {
-            const T = comptime @TypeOf(value);
-
-            if (comptime trait.isIndexable(T)) {
-                for (value) |v|
-                    try self.serialize(v);
-                return;
-            }
-
-            //custom serializer: fn(self: Self, serializer: var) !void
-            if (comptime trait.hasFn("serialize")(T)) return T.serialize(value, self);
-
-            if (comptime trait.isPacked(T) and packing != .Bit) {
-                var packed_serializer = Serializer(endian, .Bit, Error).init(self.out_stream);
-                try packed_serializer.serialize(value);
-                try packed_serializer.flush();
-                return;
-            }
-
-            switch (@typeInfo(T)) {
-                .Void => return,
-                .Bool => try self.serializeInt(@as(u1, @boolToInt(value))),
-                .Float, .Int => try self.serializeInt(value),
-                .Struct => {
-                    const info = @typeInfo(T);
-
-                    inline for (info.Struct.fields) |*field_info| {
-                        const name = field_info.name;
-                        const FieldType = field_info.field_type;
-
-                        if (FieldType == void or FieldType == u0) continue;
-
-                        //It doesn't make sense to write pointers
-                        if (comptime trait.is(.Pointer)(FieldType)) {
-                            @compileError("Will not " ++ "serialize field " ++ name ++
-                                " of struct " ++ @typeName(T) ++ " because it " ++
-                                "is of pointer-type " ++ @typeName(FieldType) ++ ".");
-                        }
-                        try self.serialize(@field(value, name));
-                    }
-                },
-                .Union => {
-                    const info = @typeInfo(T).Union;
-                    if (info.tag_type) |TagType| {
-                        const active_tag = meta.activeTag(value);
-                        try self.serialize(active_tag);
-                        //This inline loop is necessary because active_tag is a runtime
-                        // value, but @field requires a comptime value. Our alternative
-                        // is to check each field for a match
-                        inline for (info.fields) |field_info| {
-                            if (field_info.enum_field.?.value == @enumToInt(active_tag)) {
-                                const name = field_info.name;
-                                const FieldType = field_info.field_type;
-                                try self.serialize(@field(value, name));
-                                return;
-                            }
-                        }
-                        unreachable;
-                    }
-                    @compileError("Cannot meaningfully serialize " ++ @typeName(T) ++
-                        " because it is an untagged union. Use a custom serialize().");
-                },
-                .Optional => {
-                    if (value == null) {
-                        try self.serializeInt(@as(u1, @boolToInt(false)));
-                        return;
-                    }
-                    try self.serializeInt(@as(u1, @boolToInt(true)));
-
-                    const OC = comptime meta.Child(T);
-                    const val_ptr = &value.?;
-                    try self.serialize(val_ptr.*);
-                },
-                .Enum => {
-                    try self.serializeInt(@enumToInt(value));
-                },
-                else => @compileError("Cannot serialize " ++ @tagName(@typeInfo(T)) ++ " types (unimplemented)."),
-            }
-        }
-    };
-}
-
-test "import io tests" {
-    comptime {
-        _ = @import("io/test.zig");
-    }
+test "" {
+    _ = @import("io/test.zig");
 }
diff --git a/lib/std/io/bit_in_stream.zig b/lib/std/io/bit_in_stream.zig
new file mode 100644
index 0000000000..2b65523207
--- /dev/null
+++ b/lib/std/io/bit_in_stream.zig
@@ -0,0 +1,243 @@
+const std = @import("../std.zig");
+const builtin = std.builtin;
+const io = std.io;
+const assert = std.debug.assert;
+const testing = std.testing;
+const trait = std.meta.trait;
+const meta = std.meta;
+const math = std.math;
+
+/// Creates a stream which allows for reading bit fields from another stream
+pub fn BitInStream(endian: builtin.Endian, comptime InStreamType: type) type {
+    return struct {
+        in_stream: InStreamType,
+        bit_buffer: u7,
+        bit_count: u3,
+
+        pub const Error = InStreamType.Error;
+        pub const InStream = io.InStream(*Self, Error, read);
+
+        const Self = @This();
+        const u8_bit_count = comptime meta.bitCount(u8);
+        const u7_bit_count = comptime meta.bitCount(u7);
+        const u4_bit_count = comptime meta.bitCount(u4);
+
+        pub fn init(in_stream: InStreamType) Self {
+            return Self{
+                .in_stream = in_stream,
+                .bit_buffer = 0,
+                .bit_count = 0,
+            };
+        }
+
+        /// Reads `bits` bits from the stream and returns a specified unsigned int type
+        ///  containing them in the least significant end, returning an error if the
+        ///  specified number of bits could not be read.
+        pub fn readBitsNoEof(self: *Self, comptime U: type, bits: usize) !U {
+            var n: usize = undefined;
+            const result = try self.readBits(U, bits, &n);
+            if (n < bits) return error.EndOfStream;
+            return result;
+        }
+
+        /// Reads `bits` bits from the stream and returns a specified unsigned int type
+        ///  containing them in the least significant end. The number of bits successfully
+        ///  read is placed in `out_bits`, as reaching the end of the stream is not an error.
+        pub fn readBits(self: *Self, comptime U: type, bits: usize, out_bits: *usize) Error!U {
+            comptime assert(trait.isUnsignedInt(U));
+
+            //by extending the buffer to a minimum of u8 we can cover a number of edge cases
+            // related to shifting and casting.
+            const u_bit_count = comptime meta.bitCount(U);
+            const buf_bit_count = bc: {
+                assert(u_bit_count >= bits);
+                break :bc if (u_bit_count <= u8_bit_count) u8_bit_count else u_bit_count;
+            };
+            const Buf = std.meta.IntType(false, buf_bit_count);
+            const BufShift = math.Log2Int(Buf);
+
+            out_bits.* = @as(usize, 0);
+            if (U == u0 or bits == 0) return 0;
+            var out_buffer = @as(Buf, 0);
+
+            if (self.bit_count > 0) {
+                const n = if (self.bit_count >= bits) @intCast(u3, bits) else self.bit_count;
+                const shift = u7_bit_count - n;
+                switch (endian) {
+                    .Big => {
+                        out_buffer = @as(Buf, self.bit_buffer >> shift);
+                        if (n >= u7_bit_count)
+                            self.bit_buffer = 0
+                        else
+                            self.bit_buffer <<= n;
+                    },
+                    .Little => {
+                        const value = (self.bit_buffer << shift) >> shift;
+                        out_buffer = @as(Buf, value);
+                        if (n >= u7_bit_count)
+                            self.bit_buffer = 0
+                        else
+                            self.bit_buffer >>= n;
+                    },
+                }
+                self.bit_count -= n;
+                out_bits.* = n;
+            }
+            //at this point we know bit_buffer is empty
+
+            //copy bytes until we have enough bits, then leave the rest in bit_buffer
+            while (out_bits.* < bits) {
+                const n = bits - out_bits.*;
+                const next_byte = self.in_stream.readByte() catch |err| {
+                    if (err == error.EndOfStream) {
+                        return @intCast(U, out_buffer);
+                    }
+                    //@BUG: See #1810. Not sure if the bug is that I have to do this for some
+                    // streams, or that I don't for streams with emtpy errorsets.
+                    return @errSetCast(Error, err);
+                };
+
+                switch (endian) {
+                    .Big => {
+                        if (n >= u8_bit_count) {
+                            out_buffer <<= @intCast(u3, u8_bit_count - 1);
+                            out_buffer <<= 1;
+                            out_buffer |= @as(Buf, next_byte);
+                            out_bits.* += u8_bit_count;
+                            continue;
+                        }
+
+                        const shift = @intCast(u3, u8_bit_count - n);
+                        out_buffer <<= @intCast(BufShift, n);
+                        out_buffer |= @as(Buf, next_byte >> shift);
+                        out_bits.* += n;
+                        self.bit_buffer = @truncate(u7, next_byte << @intCast(u3, n - 1));
+                        self.bit_count = shift;
+                    },
+                    .Little => {
+                        if (n >= u8_bit_count) {
+                            out_buffer |= @as(Buf, next_byte) << @intCast(BufShift, out_bits.*);
+                            out_bits.* += u8_bit_count;
+                            continue;
+                        }
+
+                        const shift = @intCast(u3, u8_bit_count - n);
+                        const value = (next_byte << shift) >> shift;
+                        out_buffer |= @as(Buf, value) << @intCast(BufShift, out_bits.*);
+                        out_bits.* += n;
+                        self.bit_buffer = @truncate(u7, next_byte >> @intCast(u3, n));
+                        self.bit_count = shift;
+                    },
+                }
+            }
+
+            return @intCast(U, out_buffer);
+        }
+
+        pub fn alignToByte(self: *Self) void {
+            self.bit_buffer = 0;
+            self.bit_count = 0;
+        }
+
+        pub fn read(self: *Self, buffer: []u8) Error!usize {
+            var out_bits: usize = undefined;
+            var out_bits_total = @as(usize, 0);
+            //@NOTE: I'm not sure this is a good idea, maybe alignToByte should be forced
+            if (self.bit_count > 0) {
+                for (buffer) |*b, i| {
+                    b.* = try self.readBits(u8, u8_bit_count, &out_bits);
+                    out_bits_total += out_bits;
+                }
+                const incomplete_byte = @boolToInt(out_bits_total % u8_bit_count > 0);
+                return (out_bits_total / u8_bit_count) + incomplete_byte;
+            }
+
+            return self.in_stream.read(buffer);
+        }
+
+        pub fn inStream(self: *Self) InStream {
+            return .{ .context = self };
+        }
+    };
+}
+
+pub fn bitInStream(
+    comptime endian: builtin.Endian,
+    underlying_stream: var,
+) BitInStream(endian, @TypeOf(underlying_stream)) {
+    return BitInStream(endian, @TypeOf(underlying_stream)).init(underlying_stream);
+}
+
+test "api coverage" {
+    const mem_be = [_]u8{ 0b11001101, 0b00001011 };
+    const mem_le = [_]u8{ 0b00011101, 0b10010101 };
+
+    var mem_in_be = io.fixedBufferStream(&mem_be);
+    var bit_stream_be = bitInStream(.Big, mem_in_be.inStream());
+
+    var out_bits: usize = undefined;
+
+    const expect = testing.expect;
+    const expectError = testing.expectError;
+
+    expect(1 == try bit_stream_be.readBits(u2, 1, &out_bits));
+    expect(out_bits == 1);
+    expect(2 == try bit_stream_be.readBits(u5, 2, &out_bits));
+    expect(out_bits == 2);
+    expect(3 == try bit_stream_be.readBits(u128, 3, &out_bits));
+    expect(out_bits == 3);
+    expect(4 == try bit_stream_be.readBits(u8, 4, &out_bits));
+    expect(out_bits == 4);
+    expect(5 == try bit_stream_be.readBits(u9, 5, &out_bits));
+    expect(out_bits == 5);
+    expect(1 == try bit_stream_be.readBits(u1, 1, &out_bits));
+    expect(out_bits == 1);
+
+    mem_in_be.pos = 0;
+    bit_stream_be.bit_count = 0;
+    expect(0b110011010000101 == try bit_stream_be.readBits(u15, 15, &out_bits));
+    expect(out_bits == 15);
+
+    mem_in_be.pos = 0;
+    bit_stream_be.bit_count = 0;
+    expect(0b1100110100001011 == try bit_stream_be.readBits(u16, 16, &out_bits));
+    expect(out_bits == 16);
+
+    _ = try bit_stream_be.readBits(u0, 0, &out_bits);
+
+    expect(0 == try bit_stream_be.readBits(u1, 1, &out_bits));
+    expect(out_bits == 0);
+    expectError(error.EndOfStream, bit_stream_be.readBitsNoEof(u1, 1));
+
+    var mem_in_le = io.fixedBufferStream(&mem_le);
+    var bit_stream_le = bitInStream(.Little, mem_in_le.inStream());
+
+    expect(1 == try bit_stream_le.readBits(u2, 1, &out_bits));
+    expect(out_bits == 1);
+    expect(2 == try bit_stream_le.readBits(u5, 2, &out_bits));
+    expect(out_bits == 2);
+    expect(3 == try bit_stream_le.readBits(u128, 3, &out_bits));
+    expect(out_bits == 3);
+    expect(4 == try bit_stream_le.readBits(u8, 4, &out_bits));
+    expect(out_bits == 4);
+    expect(5 == try bit_stream_le.readBits(u9, 5, &out_bits));
+    expect(out_bits == 5);
+    expect(1 == try bit_stream_le.readBits(u1, 1, &out_bits));
+    expect(out_bits == 1);
+
+    mem_in_le.pos = 0;
+    bit_stream_le.bit_count = 0;
+    expect(0b001010100011101 == try bit_stream_le.readBits(u15, 15, &out_bits));
+    expect(out_bits == 15);
+
+    mem_in_le.pos = 0;
+    bit_stream_le.bit_count = 0;
+    expect(0b1001010100011101 == try bit_stream_le.readBits(u16, 16, &out_bits));
+    expect(out_bits == 16);
+
+    _ = try bit_stream_le.readBits(u0, 0, &out_bits);
+
+    expect(0 == try bit_stream_le.readBits(u1, 1, &out_bits));
+    expect(out_bits == 0);
+    expectError(error.EndOfStream, bit_stream_le.readBitsNoEof(u1, 1));
+}
diff --git a/lib/std/io/bit_out_stream.zig b/lib/std/io/bit_out_stream.zig
new file mode 100644
index 0000000000..1a2bb62e7c
--- /dev/null
+++ b/lib/std/io/bit_out_stream.zig
@@ -0,0 +1,197 @@
+const std = @import("../std.zig");
+const builtin = std.builtin;
+const io = std.io;
+const testing = std.testing;
+const assert = std.debug.assert;
+const trait = std.meta.trait;
+const meta = std.meta;
+const math = std.math;
+
+/// Creates a stream which allows for writing bit fields to another stream
+pub fn BitOutStream(endian: builtin.Endian, comptime OutStreamType: type) type {
+    return struct {
+        out_stream: OutStreamType,
+        bit_buffer: u8,
+        bit_count: u4,
+
+        pub const Error = OutStreamType.Error;
+        pub const OutStream = io.OutStream(*Self, Error, write);
+
+        const Self = @This();
+        const u8_bit_count = comptime meta.bitCount(u8);
+        const u4_bit_count = comptime meta.bitCount(u4);
+
+        pub fn init(out_stream: OutStreamType) Self {
+            return Self{
+                .out_stream = out_stream,
+                .bit_buffer = 0,
+                .bit_count = 0,
+            };
+        }
+
+        /// Write the specified number of bits to the stream from the least significant bits of
+        ///  the specified unsigned int value. Bits will only be written to the stream when there
+        ///  are enough to fill a byte.
+        pub fn writeBits(self: *Self, value: var, bits: usize) Error!void {
+            if (bits == 0) return;
+
+            const U = @TypeOf(value);
+            comptime assert(trait.isUnsignedInt(U));
+
+            //by extending the buffer to a minimum of u8 we can cover a number of edge cases
+            // related to shifting and casting.
+            const u_bit_count = comptime meta.bitCount(U);
+            const buf_bit_count = bc: {
+                assert(u_bit_count >= bits);
+                break :bc if (u_bit_count <= u8_bit_count) u8_bit_count else u_bit_count;
+            };
+            const Buf = std.meta.IntType(false, buf_bit_count);
+            const BufShift = math.Log2Int(Buf);
+
+            const buf_value = @intCast(Buf, value);
+
+            const high_byte_shift = @intCast(BufShift, buf_bit_count - u8_bit_count);
+            var in_buffer = switch (endian) {
+                .Big => buf_value << @intCast(BufShift, buf_bit_count - bits),
+                .Little => buf_value,
+            };
+            var in_bits = bits;
+
+            if (self.bit_count > 0) {
+                const bits_remaining = u8_bit_count - self.bit_count;
+                const n = @intCast(u3, if (bits_remaining > bits) bits else bits_remaining);
+                switch (endian) {
+                    .Big => {
+                        const shift = @intCast(BufShift, high_byte_shift + self.bit_count);
+                        const v = @intCast(u8, in_buffer >> shift);
+                        self.bit_buffer |= v;
+                        in_buffer <<= n;
+                    },
+                    .Little => {
+                        const v = @truncate(u8, in_buffer) << @intCast(u3, self.bit_count);
+                        self.bit_buffer |= v;
+                        in_buffer >>= n;
+                    },
+                }
+                self.bit_count += n;
+                in_bits -= n;
+
+                //if we didn't fill the buffer, it's because bits < bits_remaining;
+                if (self.bit_count != u8_bit_count) return;
+                try self.out_stream.writeByte(self.bit_buffer);
+                self.bit_buffer = 0;
+                self.bit_count = 0;
+            }
+            //at this point we know bit_buffer is empty
+
+            //copy bytes until we can't fill one anymore, then leave the rest in bit_buffer
+            while (in_bits >= u8_bit_count) {
+                switch (endian) {
+                    .Big => {
+                        const v = @intCast(u8, in_buffer >> high_byte_shift);
+                        try self.out_stream.writeByte(v);
+                        in_buffer <<= @intCast(u3, u8_bit_count - 1);
+                        in_buffer <<= 1;
+                    },
+                    .Little => {
+                        const v = @truncate(u8, in_buffer);
+                        try self.out_stream.writeByte(v);
+                        in_buffer >>= @intCast(u3, u8_bit_count - 1);
+                        in_buffer >>= 1;
+                    },
+                }
+                in_bits -= u8_bit_count;
+            }
+
+            if (in_bits > 0) {
+                self.bit_count = @intCast(u4, in_bits);
+                self.bit_buffer = switch (endian) {
+                    .Big => @truncate(u8, in_buffer >> high_byte_shift),
+                    .Little => @truncate(u8, in_buffer),
+                };
+            }
+        }
+
+        /// Flush any remaining bits to the stream.
+        pub fn flushBits(self: *Self) Error!void {
+            if (self.bit_count == 0) return;
+            try self.out_stream.writeByte(self.bit_buffer);
+            self.bit_buffer = 0;
+            self.bit_count = 0;
+        }
+
+        pub fn write(self: *Self, buffer: []const u8) Error!usize {
+            // TODO: I'm not sure this is a good idea, maybe flushBits should be forced
+            if (self.bit_count > 0) {
+                for (buffer) |b, i|
+                    try self.writeBits(b, u8_bit_count);
+                return buffer.len;
+            }
+
+            return self.out_stream.write(buffer);
+        }
+
+        pub fn outStream(self: *Self) OutStream {
+            return .{ .context = self };
+        }
+    };
+}
+
+pub fn bitOutStream(
+    comptime endian: builtin.Endian,
+    underlying_stream: var,
+) BitOutStream(endian, @TypeOf(underlying_stream)) {
+    return BitOutStream(endian, @TypeOf(underlying_stream)).init(underlying_stream);
+}
+
+test "api coverage" {
+    var mem_be = [_]u8{0} ** 2;
+    var mem_le = [_]u8{0} ** 2;
+
+    var mem_out_be = io.fixedBufferStream(&mem_be);
+    var bit_stream_be = bitOutStream(.Big, mem_out_be.outStream());
+
+    try bit_stream_be.writeBits(@as(u2, 1), 1);
+    try bit_stream_be.writeBits(@as(u5, 2), 2);
+    try bit_stream_be.writeBits(@as(u128, 3), 3);
+    try bit_stream_be.writeBits(@as(u8, 4), 4);
+    try bit_stream_be.writeBits(@as(u9, 5), 5);
+    try bit_stream_be.writeBits(@as(u1, 1), 1);
+
+    testing.expect(mem_be[0] == 0b11001101 and mem_be[1] == 0b00001011);
+
+    mem_out_be.pos = 0;
+
+    try bit_stream_be.writeBits(@as(u15, 0b110011010000101), 15);
+    try bit_stream_be.flushBits();
+    testing.expect(mem_be[0] == 0b11001101 and mem_be[1] == 0b00001010);
+
+    mem_out_be.pos = 0;
+    try bit_stream_be.writeBits(@as(u32, 0b110011010000101), 16);
+    testing.expect(mem_be[0] == 0b01100110 and mem_be[1] == 0b10000101);
+
+    try bit_stream_be.writeBits(@as(u0, 0), 0);
+
+    var mem_out_le = io.fixedBufferStream(&mem_le);
+    var bit_stream_le = bitOutStream(.Little, mem_out_le.outStream());
+
+    try bit_stream_le.writeBits(@as(u2, 1), 1);
+    try bit_stream_le.writeBits(@as(u5, 2), 2);
+    try bit_stream_le.writeBits(@as(u128, 3), 3);
+    try bit_stream_le.writeBits(@as(u8, 4), 4);
+    try bit_stream_le.writeBits(@as(u9, 5), 5);
+    try bit_stream_le.writeBits(@as(u1, 1), 1);
+
+    testing.expect(mem_le[0] == 0b00011101 and mem_le[1] == 0b10010101);
+
+    mem_out_le.pos = 0;
+    try bit_stream_le.writeBits(@as(u15, 0b110011010000101), 15);
+    try bit_stream_le.flushBits();
+    testing.expect(mem_le[0] == 0b10000101 and mem_le[1] == 0b01100110);
+
+    mem_out_le.pos = 0;
+    try bit_stream_le.writeBits(@as(u32, 0b1100110100001011), 16);
+    testing.expect(mem_le[0] == 0b00001011 and mem_le[1] == 0b11001101);
+
+    try bit_stream_le.writeBits(@as(u0, 0), 0);
+}
diff --git a/lib/std/io/buffered_atomic_file.zig b/lib/std/io/buffered_atomic_file.zig
new file mode 100644
index 0000000000..e2f8c75af0
--- /dev/null
+++ b/lib/std/io/buffered_atomic_file.zig
@@ -0,0 +1,50 @@
+const std = @import("../std.zig");
+const mem = std.mem;
+const fs = std.fs;
+const File = std.fs.File;
+
+pub const BufferedAtomicFile = struct {
+    atomic_file: fs.AtomicFile,
+    file_stream: File.OutStream,
+    buffered_stream: BufferedOutStream,
+    allocator: *mem.Allocator,
+
+    pub const buffer_size = 4096;
+    pub const BufferedOutStream = std.io.BufferedOutStream(buffer_size, File.OutStream);
+    pub const OutStream = std.io.OutStream(*BufferedOutStream, BufferedOutStream.Error, BufferedOutStream.write);
+
+    /// TODO when https://github.com/ziglang/zig/issues/2761 is solved
+    /// this API will not need an allocator
+    pub fn create(allocator: *mem.Allocator, dest_path: []const u8) !*BufferedAtomicFile {
+        var self = try allocator.create(BufferedAtomicFile);
+        self.* = BufferedAtomicFile{
+            .atomic_file = undefined,
+            .file_stream = undefined,
+            .buffered_stream = undefined,
+            .allocator = allocator,
+        };
+        errdefer allocator.destroy(self);
+
+        self.atomic_file = try fs.AtomicFile.init(dest_path, File.default_mode);
+        errdefer self.atomic_file.deinit();
+
+        self.file_stream = self.atomic_file.file.outStream();
+        self.buffered_stream = .{ .unbuffered_out_stream = self.file_stream };
+        return self;
+    }
+
+    /// always call destroy, even after successful finish()
+    pub fn destroy(self: *BufferedAtomicFile) void {
+        self.atomic_file.deinit();
+        self.allocator.destroy(self);
+    }
+
+    pub fn finish(self: *BufferedAtomicFile) !void {
+        try self.buffered_stream.flush();
+        try self.atomic_file.finish();
+    }
+
+    pub fn stream(self: *BufferedAtomicFile) OutStream {
+        return .{ .context = &self.buffered_stream };
+    }
+};
diff --git a/lib/std/io/buffered_in_stream.zig b/lib/std/io/buffered_in_stream.zig
new file mode 100644
index 0000000000..7f76c8c576
--- /dev/null
+++ b/lib/std/io/buffered_in_stream.zig
@@ -0,0 +1,86 @@
+const std = @import("../std.zig");
+const io = std.io;
+const assert = std.debug.assert;
+const testing = std.testing;
+
+pub fn BufferedInStream(comptime buffer_size: usize, comptime InStreamType: type) type {
+    return struct {
+        unbuffered_in_stream: InStreamType,
+        fifo: FifoType = FifoType.init(),
+
+        pub const Error = InStreamType.Error;
+        pub const InStream = io.InStream(*Self, Error, read);
+
+        const Self = @This();
+        const FifoType = std.fifo.LinearFifo(u8, std.fifo.LinearFifoBufferType{ .Static = buffer_size });
+
+        pub fn read(self: *Self, dest: []u8) Error!usize {
+            var dest_index: usize = 0;
+            while (dest_index < dest.len) {
+                const written = self.fifo.read(dest[dest_index..]);
+                if (written == 0) {
+                    // fifo empty, fill it
+                    const writable = self.fifo.writableSlice(0);
+                    assert(writable.len > 0);
+                    const n = try self.unbuffered_in_stream.read(writable);
+                    if (n == 0) {
+                        // reading from the unbuffered stream returned nothing
+                        // so we have nothing left to read.
+                        return dest_index;
+                    }
+                    self.fifo.update(n);
+                }
+                dest_index += written;
+            }
+            return dest.len;
+        }
+
+        pub fn inStream(self: *Self) InStream {
+            return .{ .context = self };
+        }
+    };
+}
+
+pub fn bufferedInStream(underlying_stream: var) BufferedInStream(4096, @TypeOf(underlying_stream)) {
+    return .{ .unbuffered_in_stream = underlying_stream };
+}
+
+test "io.BufferedInStream" {
+    const OneByteReadInStream = struct {
+        str: []const u8,
+        curr: usize,
+
+        const Error = error{NoError};
+        const Self = @This();
+        const InStream = io.InStream(*Self, Error, read);
+
+        fn init(str: []const u8) Self {
+            return Self{
+                .str = str,
+                .curr = 0,
+            };
+        }
+
+        fn read(self: *Self, dest: []u8) Error!usize {
+            if (self.str.len <= self.curr or dest.len == 0)
+                return 0;
+
+            dest[0] = self.str[self.curr];
+            self.curr += 1;
+            return 1;
+        }
+
+        fn inStream(self: *Self) InStream {
+            return .{ .context = self };
+        }
+    };
+
+    const str = "This is a test";
+    var one_byte_stream = OneByteReadInStream.init(str);
+    var buf_in_stream = bufferedInStream(one_byte_stream.inStream());
+    const stream = buf_in_stream.inStream();
+
+    const res = try stream.readAllAlloc(testing.allocator, str.len + 1);
+    defer testing.allocator.free(res);
+    testing.expectEqualSlices(u8, str, res);
+}
diff --git a/lib/std/io/buffered_out_stream.zig b/lib/std/io/buffered_out_stream.zig
new file mode 100644
index 0000000000..43af83c537
--- /dev/null
+++ b/lib/std/io/buffered_out_stream.zig
@@ -0,0 +1,41 @@
+const std = @import("../std.zig");
+const io = std.io;
+
+pub fn BufferedOutStream(comptime buffer_size: usize, comptime OutStreamType: type) type {
+    return struct {
+        unbuffered_out_stream: OutStreamType,
+        fifo: FifoType = FifoType.init(),
+
+        pub const Error = OutStreamType.Error;
+        pub const OutStream = io.OutStream(*Self, Error, write);
+
+        const Self = @This();
+        const FifoType = std.fifo.LinearFifo(u8, std.fifo.LinearFifoBufferType{ .Static = buffer_size });
+
+        pub fn flush(self: *Self) !void {
+            while (true) {
+                const slice = self.fifo.readableSlice(0);
+                if (slice.len == 0) break;
+                try self.unbuffered_out_stream.writeAll(slice);
+                self.fifo.discard(slice.len);
+            }
+        }
+
+        pub fn outStream(self: *Self) OutStream {
+            return .{ .context = self };
+        }
+
+        pub fn write(self: *Self, bytes: []const u8) Error!usize {
+            if (bytes.len >= self.fifo.writableLength()) {
+                try self.flush();
+                return self.unbuffered_out_stream.write(bytes);
+            }
+            self.fifo.writeAssumeCapacity(bytes);
+            return bytes.len;
+        }
+    };
+}
+
+pub fn bufferedOutStream(underlying_stream: var) BufferedOutStream(4096, @TypeOf(underlying_stream)) {
+    return .{ .unbuffered_out_stream = underlying_stream };
+}
diff --git a/lib/std/io/c_out_stream.zig b/lib/std/io/c_out_stream.zig
index adaa3fcbaf..106fc601a2 100644
--- a/lib/std/io/c_out_stream.zig
+++ b/lib/std/io/c_out_stream.zig
@@ -1,43 +1,44 @@
 const std = @import("../std.zig");
-const os = std.os;
-const OutStream = std.io.OutStream;
-const builtin = @import("builtin");
+const builtin = std.builtin;
+const io = std.io;
+const testing = std.testing;
 
-/// TODO make a proposal to make `std.fs.File` use *FILE when linking libc and this just becomes
-/// std.io.FileOutStream because std.fs.File.write would do this when linking
-/// libc.
-pub const COutStream = struct {
-    pub const Error = std.fs.File.WriteError;
-    pub const Stream = OutStream(Error);
+pub const COutStream = io.OutStream(*std.c.FILE, std.fs.File.WriteError, cOutStreamWrite);
 
-    stream: Stream,
-    c_file: *std.c.FILE,
+pub fn cOutStream(c_file: *std.c.FILE) COutStream {
+    return .{ .context = c_file };
+}
 
-    pub fn init(c_file: *std.c.FILE) COutStream {
-        return COutStream{
-            .c_file = c_file,
-            .stream = Stream{ .writeFn = writeFn },
-        };
+fn cOutStreamWrite(c_file: *std.c.FILE, bytes: []const u8) std.fs.File.WriteError!usize {
+    const amt_written = std.c.fwrite(bytes.ptr, 1, bytes.len, c_file);
+    if (amt_written >= 0) return amt_written;
+    switch (std.c._errno().*) {
+        0 => unreachable,
+        os.EINVAL => unreachable,
+        os.EFAULT => unreachable,
+        os.EAGAIN => unreachable, // this is a blocking API
+        os.EBADF => unreachable, // always a race condition
+        os.EDESTADDRREQ => unreachable, // connect was never called
+        os.EDQUOT => return error.DiskQuota,
+        os.EFBIG => return error.FileTooBig,
+        os.EIO => return error.InputOutput,
+        os.ENOSPC => return error.NoSpaceLeft,
+        os.EPERM => return error.AccessDenied,
+        os.EPIPE => return error.BrokenPipe,
+        else => |err| return os.unexpectedErrno(@intCast(usize, err)),
+    }
+}
+
+test "" {
+    if (!builtin.link_libc) return error.SkipZigTest;
+
+    const filename = "tmp_io_test_file.txt";
+    const out_file = std.c.fopen(filename, "w") orelse return error.UnableToOpenTestFile;
+    defer {
+        _ = std.c.fclose(out_file);
+        fs.cwd().deleteFileC(filename) catch {};
     }
 
-    fn writeFn(out_stream: *Stream, bytes: []const u8) Error!usize {
-        const self = @fieldParentPtr(COutStream, "stream", out_stream);
-        const amt_written = std.c.fwrite(bytes.ptr, 1, bytes.len, self.c_file);
-        if (amt_written >= 0) return amt_written;
-        switch (std.c._errno().*) {
-            0 => unreachable,
-            os.EINVAL => unreachable,
-            os.EFAULT => unreachable,
-            os.EAGAIN => unreachable, // this is a blocking API
-            os.EBADF => unreachable, // always a race condition
-            os.EDESTADDRREQ => unreachable, // connect was never called
-            os.EDQUOT => return error.DiskQuota,
-            os.EFBIG => return error.FileTooBig,
-            os.EIO => return error.InputOutput,
-            os.ENOSPC => return error.NoSpaceLeft,
-            os.EPERM => return error.AccessDenied,
-            os.EPIPE => return error.BrokenPipe,
-            else => |err| return os.unexpectedErrno(@intCast(usize, err)),
-        }
-    }
-};
+    const out_stream = &io.COutStream.init(out_file).stream;
+    try out_stream.print("hi: {}\n", .{@as(i32, 123)});
+}
diff --git a/lib/std/io/counting_out_stream.zig b/lib/std/io/counting_out_stream.zig
new file mode 100644
index 0000000000..f5bd6634f3
--- /dev/null
+++ b/lib/std/io/counting_out_stream.zig
@@ -0,0 +1,39 @@
+const std = @import("../std.zig");
+const io = std.io;
+const testing = std.testing;
+
+/// An OutStream that counts how many bytes has been written to it.
+pub fn CountingOutStream(comptime OutStreamType: type) type {
+    return struct {
+        bytes_written: u64,
+        child_stream: OutStreamType,
+
+        pub const Error = OutStreamType.Error;
+        pub const OutStream = io.OutStream(*Self, Error, write);
+
+        const Self = @This();
+
+        pub fn write(self: *Self, bytes: []const u8) Error!usize {
+            const amt = try self.child_stream.write(bytes);
+            self.bytes_written += amt;
+            return amt;
+        }
+
+        pub fn outStream(self: *Self) OutStream {
+            return .{ .context = self };
+        }
+    };
+}
+
+pub fn countingOutStream(child_stream: var) CountingOutStream(@TypeOf(child_stream)) {
+    return .{ .bytes_written = 0, .child_stream = child_stream };
+}
+
+test "io.CountingOutStream" {
+    var counting_stream = countingOutStream(std.io.null_out_stream);
+    const stream = counting_stream.outStream();
+
+    const bytes = "yay" ** 100;
+    stream.writeAll(bytes) catch unreachable;
+    testing.expect(counting_stream.bytes_written == bytes.len);
+}
diff --git a/lib/std/io/fixed_buffer_stream.zig b/lib/std/io/fixed_buffer_stream.zig
new file mode 100644
index 0000000000..2f7d613aa6
--- /dev/null
+++ b/lib/std/io/fixed_buffer_stream.zig
@@ -0,0 +1,171 @@
+const std = @import("../std.zig");
+const io = std.io;
+const testing = std.testing;
+const mem = std.mem;
+const assert = std.debug.assert;
+
+/// This turns a byte buffer into an `io.OutStream`, `io.InStream`, or `io.SeekableStream`.
+/// If the supplied byte buffer is const, then `io.OutStream` is not available.
+pub fn FixedBufferStream(comptime Buffer: type) type {
+    return struct {
+        /// `Buffer` is either a `[]u8` or `[]const u8`.
+        buffer: Buffer,
+        pos: usize,
+
+        pub const ReadError = error{};
+        pub const WriteError = error{NoSpaceLeft};
+        pub const SeekError = error{};
+        pub const GetSeekPosError = error{};
+
+        pub const InStream = io.InStream(*Self, ReadError, read);
+        pub const OutStream = io.OutStream(*Self, WriteError, write);
+
+        pub const SeekableStream = io.SeekableStream(
+            *Self,
+            SeekError,
+            GetSeekPosError,
+            seekTo,
+            seekBy,
+            getPos,
+            getEndPos,
+        );
+
+        const Self = @This();
+
+        pub fn inStream(self: *Self) InStream {
+            return .{ .context = self };
+        }
+
+        pub fn outStream(self: *Self) OutStream {
+            return .{ .context = self };
+        }
+
+        pub fn seekableStream(self: *Self) SeekableStream {
+            return .{ .context = self };
+        }
+
+        pub fn read(self: *Self, dest: []u8) ReadError!usize {
+            const size = std.math.min(dest.len, self.buffer.len - self.pos);
+            const end = self.pos + size;
+
+            mem.copy(u8, dest[0..size], self.buffer[self.pos..end]);
+            self.pos = end;
+
+            return size;
+        }
+
+        /// If the returned number of bytes written is less than requested, the
+        /// buffer is full. Returns `error.NoSpaceLeft` when no bytes would be written.
+        /// Note: `error.NoSpaceLeft` matches the corresponding error from
+        /// `std.fs.File.WriteError`.
+        pub fn write(self: *Self, bytes: []const u8) WriteError!usize {
+            if (bytes.len == 0) return 0;
+            if (self.pos >= self.buffer.len) return error.NoSpaceLeft;
+
+            const n = if (self.pos + bytes.len <= self.buffer.len)
+                bytes.len
+            else
+                self.buffer.len - self.pos;
+
+            mem.copy(u8, self.buffer[self.pos .. self.pos + n], bytes[0..n]);
+            self.pos += n;
+
+            if (n == 0) return error.NoSpaceLeft;
+
+            return n;
+        }
+
+        pub fn seekTo(self: *Self, pos: u64) SeekError!void {
+            self.pos = if (std.math.cast(usize, pos)) |x| x else |_| self.buffer.len;
+        }
+
+        pub fn seekBy(self: *Self, amt: i64) SeekError!void {
+            if (amt < 0) {
+                const abs_amt = std.math.absCast(amt);
+                const abs_amt_usize = std.math.cast(usize, abs_amt) catch std.math.maxInt(usize);
+                if (abs_amt_usize > self.pos) {
+                    self.pos = 0;
+                } else {
+                    self.pos -= abs_amt_usize;
+                }
+            } else {
+                const amt_usize = std.math.cast(usize, amt) catch std.math.maxInt(usize);
+                const new_pos = std.math.add(usize, self.pos, amt_usize) catch std.math.maxInt(usize);
+                self.pos = std.math.min(self.buffer.len, new_pos);
+            }
+        }
+
+        pub fn getEndPos(self: *Self) GetSeekPosError!u64 {
+            return self.buffer.len;
+        }
+
+        pub fn getPos(self: *Self) GetSeekPosError!u64 {
+            return self.pos;
+        }
+
+        pub fn getWritten(self: Self) Buffer {
+            return self.buffer[0..self.pos];
+        }
+
+        pub fn reset(self: *Self) void {
+            self.pos = 0;
+        }
+    };
+}
+
+pub fn fixedBufferStream(buffer: var) FixedBufferStream(NonSentinelSpan(@TypeOf(buffer))) {
+    return .{ .buffer = mem.span(buffer), .pos = 0 };
+}
+
+fn NonSentinelSpan(comptime T: type) type {
+    var ptr_info = @typeInfo(mem.Span(T)).Pointer;
+    ptr_info.sentinel = null;
+    return @Type(std.builtin.TypeInfo{ .Pointer = ptr_info });
+}
+
+test "FixedBufferStream output" {
+    var buf: [255]u8 = undefined;
+    var fbs = fixedBufferStream(&buf);
+    const stream = fbs.outStream();
+
+    try stream.print("{}{}!", .{ "Hello", "World" });
+    testing.expectEqualSlices(u8, "HelloWorld!", fbs.getWritten());
+}
+
+test "FixedBufferStream output 2" {
+    var buffer: [10]u8 = undefined;
+    var fbs = fixedBufferStream(&buffer);
+
+    try fbs.outStream().writeAll("Hello");
+    testing.expect(mem.eql(u8, fbs.getWritten(), "Hello"));
+
+    try fbs.outStream().writeAll("world");
+    testing.expect(mem.eql(u8, fbs.getWritten(), "Helloworld"));
+
+    testing.expectError(error.NoSpaceLeft, fbs.outStream().writeAll("!"));
+    testing.expect(mem.eql(u8, fbs.getWritten(), "Helloworld"));
+
+    fbs.reset();
+    testing.expect(fbs.getWritten().len == 0);
+
+    testing.expectError(error.NoSpaceLeft, fbs.outStream().writeAll("Hello world!"));
+    testing.expect(mem.eql(u8, fbs.getWritten(), "Hello worl"));
+}
+
+test "FixedBufferStream input" {
+    const bytes = [_]u8{ 1, 2, 3, 4, 5, 6, 7 };
+    var fbs = fixedBufferStream(&bytes);
+
+    var dest: [4]u8 = undefined;
+
+    var read = try fbs.inStream().read(dest[0..4]);
+    testing.expect(read == 4);
+    testing.expect(mem.eql(u8, dest[0..4], bytes[0..4]));
+
+    read = try fbs.inStream().read(dest[0..4]);
+    testing.expect(read == 3);
+    testing.expect(mem.eql(u8, dest[0..3], bytes[4..7]));
+
+    read = try fbs.inStream().read(dest[0..4]);
+    testing.expect(read == 0);
+}
diff --git a/lib/std/io/in_stream.zig b/lib/std/io/in_stream.zig
index e234182771..d1d24ab427 100644
--- a/lib/std/io/in_stream.zig
+++ b/lib/std/io/in_stream.zig
@@ -1,53 +1,37 @@
 const std = @import("../std.zig");
-const builtin = @import("builtin");
-const root = @import("root");
+const builtin = std.builtin;
 const math = std.math;
 const assert = std.debug.assert;
 const mem = std.mem;
 const Buffer = std.Buffer;
 const testing = std.testing;
 
-pub const default_stack_size = 1 * 1024 * 1024;
-pub const stack_size: usize = if (@hasDecl(root, "stack_size_std_io_InStream"))
-    root.stack_size_std_io_InStream
-else
-    default_stack_size;
-
-pub fn InStream(comptime ReadError: type) type {
+pub fn InStream(
+    comptime Context: type,
+    comptime ReadError: type,
+    /// Returns the number of bytes read. It may be less than buffer.len.
+    /// If the number of bytes read is 0, it means end of stream.
+    /// End of stream is not an error condition.
+    comptime readFn: fn (context: Context, buffer: []u8) ReadError!usize,
+) type {
     return struct {
-        const Self = @This();
         pub const Error = ReadError;
-        pub const ReadFn = if (std.io.is_async)
-            async fn (self: *Self, buffer: []u8) Error!usize
-        else
-            fn (self: *Self, buffer: []u8) Error!usize;
+
+        context: Context,
+
+        const Self = @This();
 
         /// Returns the number of bytes read. It may be less than buffer.len.
         /// If the number of bytes read is 0, it means end of stream.
         /// End of stream is not an error condition.
-        readFn: ReadFn,
-
-        /// Returns the number of bytes read. It may be less than buffer.len.
-        /// If the number of bytes read is 0, it means end of stream.
-        /// End of stream is not an error condition.
-        pub fn read(self: *Self, buffer: []u8) Error!usize {
-            if (std.io.is_async) {
-                // Let's not be writing 0xaa in safe modes for upwards of 4 MiB for every stream read.
-                @setRuntimeSafety(false);
-                var stack_frame: [stack_size]u8 align(std.Target.stack_align) = undefined;
-                return await @asyncCall(&stack_frame, {}, self.readFn, self, buffer);
-            } else {
-                return self.readFn(self, buffer);
-            }
+        pub fn read(self: Self, buffer: []u8) Error!usize {
+            return readFn(self.context, buffer);
         }
 
-        /// Deprecated: use `readAll`.
-        pub const readFull = readAll;
-
-        /// Returns the number of bytes read. If the number read is smaller than buf.len, it
+        /// Returns the number of bytes read. If the number read is smaller than `buffer.len`, it
         /// means the stream reached the end. Reaching the end of a stream is not an error
         /// condition.
-        pub fn readAll(self: *Self, buffer: []u8) Error!usize {
+        pub fn readAll(self: Self, buffer: []u8) Error!usize {
             var index: usize = 0;
             while (index != buffer.len) {
                 const amt = try self.read(buffer[index..]);
@@ -59,13 +43,13 @@ pub fn InStream(comptime ReadError: type) type {
 
         /// Returns the number of bytes read. If the number read would be smaller than buf.len,
         /// error.EndOfStream is returned instead.
-        pub fn readNoEof(self: *Self, buf: []u8) !void {
+        pub fn readNoEof(self: Self, buf: []u8) !void {
             const amt_read = try self.readAll(buf);
             if (amt_read < buf.len) return error.EndOfStream;
         }
 
         /// Deprecated: use `readAllArrayList`.
-        pub fn readAllBuffer(self: *Self, buffer: *Buffer, max_size: usize) !void {
+        pub fn readAllBuffer(self: Self, buffer: *Buffer, max_size: usize) !void {
             buffer.list.shrink(0);
             try self.readAllArrayList(&buffer.list, max_size);
             errdefer buffer.shrink(0);
@@ -75,7 +59,7 @@ pub fn InStream(comptime ReadError: type) type {
         /// Appends to the `std.ArrayList` contents by reading from the stream until end of stream is found.
         /// If the number of bytes appended would exceed `max_append_size`, `error.StreamTooLong` is returned
         /// and the `std.ArrayList` has exactly `max_append_size` bytes appended.
-        pub fn readAllArrayList(self: *Self, array_list: *std.ArrayList(u8), max_append_size: usize) !void {
+        pub fn readAllArrayList(self: Self, array_list: *std.ArrayList(u8), max_append_size: usize) !void {
             try array_list.ensureCapacity(math.min(max_append_size, 4096));
             const original_len = array_list.len;
             var start_index: usize = original_len;
@@ -104,7 +88,7 @@ pub fn InStream(comptime ReadError: type) type {
         /// memory would be greater than `max_size`, returns `error.StreamTooLong`.
         /// Caller owns returned memory.
         /// If this function returns an error, the contents from the stream read so far are lost.
-        pub fn readAllAlloc(self: *Self, allocator: *mem.Allocator, max_size: usize) ![]u8 {
+        pub fn readAllAlloc(self: Self, allocator: *mem.Allocator, max_size: usize) ![]u8 {
             var array_list = std.ArrayList(u8).init(allocator);
             defer array_list.deinit();
             try self.readAllArrayList(&array_list, max_size);
@@ -116,7 +100,7 @@ pub fn InStream(comptime ReadError: type) type {
         /// If the `std.ArrayList` length would exceed `max_size`, `error.StreamTooLong` is returned and the
         /// `std.ArrayList` is populated with `max_size` bytes from the stream.
         pub fn readUntilDelimiterArrayList(
-            self: *Self,
+            self: Self,
             array_list: *std.ArrayList(u8),
             delimiter: u8,
             max_size: usize,
@@ -142,7 +126,7 @@ pub fn InStream(comptime ReadError: type) type {
         /// Caller owns returned memory.
         /// If this function returns an error, the contents from the stream read so far are lost.
         pub fn readUntilDelimiterAlloc(
-            self: *Self,
+            self: Self,
             allocator: *mem.Allocator,
             delimiter: u8,
             max_size: usize,
@@ -159,7 +143,7 @@ pub fn InStream(comptime ReadError: type) type {
         /// function is called again after that, returns null.
         /// Returns a slice of the stream data, with ptr equal to `buf.ptr`. The
         /// delimiter byte is not included in the returned slice.
-        pub fn readUntilDelimiterOrEof(self: *Self, buf: []u8, delimiter: u8) !?[]u8 {
+        pub fn readUntilDelimiterOrEof(self: Self, buf: []u8, delimiter: u8) !?[]u8 {
             var index: usize = 0;
             while (true) {
                 const byte = self.readByte() catch |err| switch (err) {
@@ -184,7 +168,7 @@ pub fn InStream(comptime ReadError: type) type {
         /// Reads from the stream until specified byte is found, discarding all data,
         /// including the delimiter.
         /// If end-of-stream is found, this function succeeds.
-        pub fn skipUntilDelimiterOrEof(self: *Self, delimiter: u8) !void {
+        pub fn skipUntilDelimiterOrEof(self: Self, delimiter: u8) !void {
             while (true) {
                 const byte = self.readByte() catch |err| switch (err) {
                     error.EndOfStream => return,
@@ -195,7 +179,7 @@ pub fn InStream(comptime ReadError: type) type {
         }
 
         /// Reads 1 byte from the stream or returns `error.EndOfStream`.
-        pub fn readByte(self: *Self) !u8 {
+        pub fn readByte(self: Self) !u8 {
             var result: [1]u8 = undefined;
             const amt_read = try self.read(result[0..]);
             if (amt_read < 1) return error.EndOfStream;
@@ -203,43 +187,43 @@ pub fn InStream(comptime ReadError: type) type {
         }
 
         /// Same as `readByte` except the returned byte is signed.
-        pub fn readByteSigned(self: *Self) !i8 {
+        pub fn readByteSigned(self: Self) !i8 {
             return @bitCast(i8, try self.readByte());
         }
 
         /// Reads a native-endian integer
-        pub fn readIntNative(self: *Self, comptime T: type) !T {
+        pub fn readIntNative(self: Self, comptime T: type) !T {
             var bytes: [(T.bit_count + 7) / 8]u8 = undefined;
             try self.readNoEof(bytes[0..]);
             return mem.readIntNative(T, &bytes);
         }
 
         /// Reads a foreign-endian integer
-        pub fn readIntForeign(self: *Self, comptime T: type) !T {
+        pub fn readIntForeign(self: Self, comptime T: type) !T {
             var bytes: [(T.bit_count + 7) / 8]u8 = undefined;
             try self.readNoEof(bytes[0..]);
             return mem.readIntForeign(T, &bytes);
         }
 
-        pub fn readIntLittle(self: *Self, comptime T: type) !T {
+        pub fn readIntLittle(self: Self, comptime T: type) !T {
             var bytes: [(T.bit_count + 7) / 8]u8 = undefined;
             try self.readNoEof(bytes[0..]);
             return mem.readIntLittle(T, &bytes);
         }
 
-        pub fn readIntBig(self: *Self, comptime T: type) !T {
+        pub fn readIntBig(self: Self, comptime T: type) !T {
             var bytes: [(T.bit_count + 7) / 8]u8 = undefined;
             try self.readNoEof(bytes[0..]);
             return mem.readIntBig(T, &bytes);
         }
 
-        pub fn readInt(self: *Self, comptime T: type, endian: builtin.Endian) !T {
+        pub fn readInt(self: Self, comptime T: type, endian: builtin.Endian) !T {
             var bytes: [(T.bit_count + 7) / 8]u8 = undefined;
             try self.readNoEof(bytes[0..]);
             return mem.readInt(T, &bytes, endian);
         }
 
-        pub fn readVarInt(self: *Self, comptime ReturnType: type, endian: builtin.Endian, size: usize) !ReturnType {
+        pub fn readVarInt(self: Self, comptime ReturnType: type, endian: builtin.Endian, size: usize) !ReturnType {
             assert(size <= @sizeOf(ReturnType));
             var bytes_buf: [@sizeOf(ReturnType)]u8 = undefined;
             const bytes = bytes_buf[0..size];
@@ -247,14 +231,14 @@ pub fn InStream(comptime ReadError: type) type {
             return mem.readVarInt(ReturnType, bytes, endian);
         }
 
-        pub fn skipBytes(self: *Self, num_bytes: u64) !void {
+        pub fn skipBytes(self: Self, num_bytes: u64) !void {
             var i: u64 = 0;
             while (i < num_bytes) : (i += 1) {
                 _ = try self.readByte();
             }
         }
 
-        pub fn readStruct(self: *Self, comptime T: type) !T {
+        pub fn readStruct(self: Self, comptime T: type) !T {
             // Only extern and packed structs have defined in-memory layout.
             comptime assert(@typeInfo(T).Struct.layout != builtin.TypeInfo.ContainerLayout.Auto);
             var res: [1]T = undefined;
@@ -265,7 +249,7 @@ pub fn InStream(comptime ReadError: type) type {
         /// Reads an integer with the same size as the given enum's tag type. If the integer matches
         /// an enum tag, casts the integer to the enum tag and returns it. Otherwise, returns an error.
         /// TODO optimization taking advantage of most fields being in order
-        pub fn readEnum(self: *Self, comptime Enum: type, endian: builtin.Endian) !Enum {
+        pub fn readEnum(self: Self, comptime Enum: type, endian: builtin.Endian) !Enum {
             const E = error{
                 /// An integer was read, but it did not match any of the tags in the supplied enum.
                 InvalidValue,
@@ -286,8 +270,7 @@ pub fn InStream(comptime ReadError: type) type {
 
 test "InStream" {
     var buf = "a\x02".*;
-    var slice_stream = std.io.SliceInStream.init(&buf);
-    const in_stream = &slice_stream.stream;
+    const in_stream = std.io.fixedBufferStream(&buf).inStream();
     testing.expect((try in_stream.readByte()) == 'a');
     testing.expect((try in_stream.readEnum(enum(u8) {
         a = 0,
diff --git a/lib/std/io/out_stream.zig b/lib/std/io/out_stream.zig
index cb75b27bf1..bf3ae791a1 100644
--- a/lib/std/io/out_stream.zig
+++ b/lib/std/io/out_stream.zig
@@ -1,94 +1,85 @@
 const std = @import("../std.zig");
-const builtin = @import("builtin");
-const root = @import("root");
+const builtin = std.builtin;
 const mem = std.mem;
 
-pub const default_stack_size = 1 * 1024 * 1024;
-pub const stack_size: usize = if (@hasDecl(root, "stack_size_std_io_OutStream"))
-    root.stack_size_std_io_OutStream
-else
-    default_stack_size;
-
-pub fn OutStream(comptime WriteError: type) type {
+pub fn OutStream(
+    comptime Context: type,
+    comptime WriteError: type,
+    comptime writeFn: fn (context: Context, bytes: []const u8) WriteError!usize,
+) type {
     return struct {
+        context: Context,
+
         const Self = @This();
         pub const Error = WriteError;
-        pub const WriteFn = if (std.io.is_async)
-            async fn (self: *Self, bytes: []const u8) Error!usize
-        else
-            fn (self: *Self, bytes: []const u8) Error!usize;
 
-        writeFn: WriteFn,
-
-        pub fn writeOnce(self: *Self, bytes: []const u8) Error!usize {
-            if (std.io.is_async) {
-                // Let's not be writing 0xaa in safe modes for upwards of 4 MiB for every stream write.
-                @setRuntimeSafety(false);
-                var stack_frame: [stack_size]u8 align(std.Target.stack_align) = undefined;
-                return await @asyncCall(&stack_frame, {}, self.writeFn, self, bytes);
-            } else {
-                return self.writeFn(self, bytes);
-            }
+        pub fn write(self: Self, bytes: []const u8) Error!usize {
+            return writeFn(self.context, bytes);
         }
 
-        pub fn write(self: *Self, bytes: []const u8) Error!void {
+        pub fn writeAll(self: Self, bytes: []const u8) Error!void {
             var index: usize = 0;
             while (index != bytes.len) {
-                index += try self.writeOnce(bytes[index..]);
+                index += try self.write(bytes[index..]);
             }
         }
 
-        pub fn print(self: *Self, comptime format: []const u8, args: var) Error!void {
-            return std.fmt.format(self, Error, write, format, args);
+        pub fn print(self: Self, comptime format: []const u8, args: var) Error!void {
+            return std.fmt.format(self, format, args);
         }
 
-        pub fn writeByte(self: *Self, byte: u8) Error!void {
+        pub fn writeByte(self: Self, byte: u8) Error!void {
             const array = [1]u8{byte};
-            return self.write(&array);
+            return self.writeAll(&array);
         }
 
-        pub fn writeByteNTimes(self: *Self, byte: u8, n: usize) Error!void {
+        pub fn writeByteNTimes(self: Self, byte: u8, n: usize) Error!void {
             var bytes: [256]u8 = undefined;
             mem.set(u8, bytes[0..], byte);
 
             var remaining: usize = n;
             while (remaining > 0) {
                 const to_write = std.math.min(remaining, bytes.len);
-                try self.write(bytes[0..to_write]);
+                try self.writeAll(bytes[0..to_write]);
                 remaining -= to_write;
             }
         }
 
         /// Write a native-endian integer.
-        pub fn writeIntNative(self: *Self, comptime T: type, value: T) Error!void {
+        /// TODO audit non-power-of-two int sizes
+        pub fn writeIntNative(self: Self, comptime T: type, value: T) Error!void {
             var bytes: [(T.bit_count + 7) / 8]u8 = undefined;
             mem.writeIntNative(T, &bytes, value);
-            return self.write(&bytes);
+            return self.writeAll(&bytes);
         }
 
         /// Write a foreign-endian integer.
-        pub fn writeIntForeign(self: *Self, comptime T: type, value: T) Error!void {
+        /// TODO audit non-power-of-two int sizes
+        pub fn writeIntForeign(self: Self, comptime T: type, value: T) Error!void {
             var bytes: [(T.bit_count + 7) / 8]u8 = undefined;
             mem.writeIntForeign(T, &bytes, value);
-            return self.write(&bytes);
+            return self.writeAll(&bytes);
         }
 
-        pub fn writeIntLittle(self: *Self, comptime T: type, value: T) Error!void {
+        /// TODO audit non-power-of-two int sizes
+        pub fn writeIntLittle(self: Self, comptime T: type, value: T) Error!void {
             var bytes: [(T.bit_count + 7) / 8]u8 = undefined;
             mem.writeIntLittle(T, &bytes, value);
-            return self.write(&bytes);
+            return self.writeAll(&bytes);
         }
 
-        pub fn writeIntBig(self: *Self, comptime T: type, value: T) Error!void {
+        /// TODO audit non-power-of-two int sizes
+        pub fn writeIntBig(self: Self, comptime T: type, value: T) Error!void {
             var bytes: [(T.bit_count + 7) / 8]u8 = undefined;
             mem.writeIntBig(T, &bytes, value);
-            return self.write(&bytes);
+            return self.writeAll(&bytes);
         }
 
-        pub fn writeInt(self: *Self, comptime T: type, value: T, endian: builtin.Endian) Error!void {
+        /// TODO audit non-power-of-two int sizes
+        pub fn writeInt(self: Self, comptime T: type, value: T, endian: builtin.Endian) Error!void {
             var bytes: [(T.bit_count + 7) / 8]u8 = undefined;
             mem.writeInt(T, &bytes, value, endian);
-            return self.write(&bytes);
+            return self.writeAll(&bytes);
         }
     };
 }
diff --git a/lib/std/io/peek_stream.zig b/lib/std/io/peek_stream.zig
new file mode 100644
index 0000000000..5ee30ce273
--- /dev/null
+++ b/lib/std/io/peek_stream.zig
@@ -0,0 +1,112 @@
+const std = @import("../std.zig");
+const io = std.io;
+const mem = std.mem;
+const testing = std.testing;
+
+/// Creates a stream which supports 'un-reading' data, so that it can be read again.
+/// This makes look-ahead style parsing much easier.
+/// TODO merge this with `std.io.BufferedInStream`: https://github.com/ziglang/zig/issues/4501
+pub fn PeekStream(
+    comptime buffer_type: std.fifo.LinearFifoBufferType,
+    comptime InStreamType: type,
+) type {
+    return struct {
+        unbuffered_in_stream: InStreamType,
+        fifo: FifoType,
+
+        pub const Error = InStreamType.Error;
+        pub const InStream = io.InStream(*Self, Error, read);
+
+        const Self = @This();
+        const FifoType = std.fifo.LinearFifo(u8, buffer_type);
+
+        pub usingnamespace switch (buffer_type) {
+            .Static => struct {
+                pub fn init(base: InStreamType) Self {
+                    return .{
+                        .base = base,
+                        .fifo = FifoType.init(),
+                    };
+                }
+            },
+            .Slice => struct {
+                pub fn init(base: InStreamType, buf: []u8) Self {
+                    return .{
+                        .base = base,
+                        .fifo = FifoType.init(buf),
+                    };
+                }
+            },
+            .Dynamic => struct {
+                pub fn init(base: InStreamType, allocator: *mem.Allocator) Self {
+                    return .{
+                        .base = base,
+                        .fifo = FifoType.init(allocator),
+                    };
+                }
+            },
+        };
+
+        pub fn putBackByte(self: *Self, byte: u8) !void {
+            try self.putBack(&[_]u8{byte});
+        }
+
+        pub fn putBack(self: *Self, bytes: []const u8) !void {
+            try self.fifo.unget(bytes);
+        }
+
+        pub fn read(self: *Self, dest: []u8) Error!usize {
+            // copy over anything putBack()'d
+            var dest_index = self.fifo.read(dest);
+            if (dest_index == dest.len) return dest_index;
+
+            // ask the backing stream for more
+            dest_index += try self.base.read(dest[dest_index..]);
+            return dest_index;
+        }
+
+        pub fn inStream(self: *Self) InStream {
+            return .{ .context = self };
+        }
+    };
+}
+
+pub fn peekStream(
+    comptime lookahead: comptime_int,
+    underlying_stream: var,
+) PeekStream(.{ .Static = lookahead }, @TypeOf(underlying_stream)) {
+    return PeekStream(.{ .Static = lookahead }, @TypeOf(underlying_stream)).init(underlying_stream);
+}
+
+test "PeekStream" {
+    const bytes = [_]u8{ 1, 2, 3, 4, 5, 6, 7, 8 };
+    var fbs = io.fixedBufferStream(&bytes);
+    var ps = peekStream(2, fbs.inStream());
+
+    var dest: [4]u8 = undefined;
+
+    try ps.putBackByte(9);
+    try ps.putBackByte(10);
+
+    var read = try ps.inStream().read(dest[0..4]);
+    testing.expect(read == 4);
+    testing.expect(dest[0] == 10);
+    testing.expect(dest[1] == 9);
+    testing.expect(mem.eql(u8, dest[2..4], bytes[0..2]));
+
+    read = try ps.inStream().read(dest[0..4]);
+    testing.expect(read == 4);
+    testing.expect(mem.eql(u8, dest[0..4], bytes[2..6]));
+
+    read = try ps.inStream().read(dest[0..4]);
+    testing.expect(read == 2);
+    testing.expect(mem.eql(u8, dest[0..2], bytes[6..8]));
+
+    try ps.putBackByte(11);
+    try ps.putBackByte(12);
+
+    read = try ps.inStream().read(dest[0..4]);
+    testing.expect(read == 2);
+    testing.expect(dest[0] == 12);
+    testing.expect(dest[1] == 11);
+}
diff --git a/lib/std/io/seekable_stream.zig b/lib/std/io/seekable_stream.zig
index 052abbc856..ed410b7aa7 100644
--- a/lib/std/io/seekable_stream.zig
+++ b/lib/std/io/seekable_stream.zig
@@ -1,103 +1,36 @@
 const std = @import("../std.zig");
 const InStream = std.io.InStream;
 
-pub fn SeekableStream(comptime SeekErrorType: type, comptime GetSeekPosErrorType: type) type {
+pub fn SeekableStream(
+    comptime Context: type,
+    comptime SeekErrorType: type,
+    comptime GetSeekPosErrorType: type,
+    comptime seekToFn: fn (context: Context, pos: u64) SeekErrorType!void,
+    comptime seekByFn: fn (context: Context, pos: i64) SeekErrorType!void,
+    comptime getPosFn: fn (context: Context) GetSeekPosErrorType!u64,
+    comptime getEndPosFn: fn (context: Context) GetSeekPosErrorType!u64,
+) type {
     return struct {
+        context: Context,
+
         const Self = @This();
         pub const SeekError = SeekErrorType;
         pub const GetSeekPosError = GetSeekPosErrorType;
 
-        seekToFn: fn (self: *Self, pos: u64) SeekError!void,
-        seekByFn: fn (self: *Self, pos: i64) SeekError!void,
-
-        getPosFn: fn (self: *Self) GetSeekPosError!u64,
-        getEndPosFn: fn (self: *Self) GetSeekPosError!u64,
-
-        pub fn seekTo(self: *Self, pos: u64) SeekError!void {
-            return self.seekToFn(self, pos);
+        pub fn seekTo(self: Self, pos: u64) SeekError!void {
+            return seekToFn(self.context, pos);
         }
 
-        pub fn seekBy(self: *Self, amt: i64) SeekError!void {
-            return self.seekByFn(self, amt);
+        pub fn seekBy(self: Self, amt: i64) SeekError!void {
+            return seekByFn(self.context, amt);
         }
 
-        pub fn getEndPos(self: *Self) GetSeekPosError!u64 {
-            return self.getEndPosFn(self);
+        pub fn getEndPos(self: Self) GetSeekPosError!u64 {
+            return getEndPosFn(self.context);
         }
 
-        pub fn getPos(self: *Self) GetSeekPosError!u64 {
-            return self.getPosFn(self);
+        pub fn getPos(self: Self) GetSeekPosError!u64 {
+            return getPosFn(self.context);
         }
     };
 }
-
-pub const SliceSeekableInStream = struct {
-    const Self = @This();
-    pub const Error = error{};
-    pub const SeekError = error{EndOfStream};
-    pub const GetSeekPosError = error{};
-    pub const Stream = InStream(Error);
-    pub const SeekableInStream = SeekableStream(SeekError, GetSeekPosError);
-
-    stream: Stream,
-    seekable_stream: SeekableInStream,
-
-    pos: usize,
-    slice: []const u8,
-
-    pub fn init(slice: []const u8) Self {
-        return Self{
-            .slice = slice,
-            .pos = 0,
-            .stream = Stream{ .readFn = readFn },
-            .seekable_stream = SeekableInStream{
-                .seekToFn = seekToFn,
-                .seekByFn = seekByFn,
-                .getEndPosFn = getEndPosFn,
-                .getPosFn = getPosFn,
-            },
-        };
-    }
-
-    fn readFn(in_stream: *Stream, dest: []u8) Error!usize {
-        const self = @fieldParentPtr(Self, "stream", in_stream);
-        const size = std.math.min(dest.len, self.slice.len - self.pos);
-        const end = self.pos + size;
-
-        std.mem.copy(u8, dest[0..size], self.slice[self.pos..end]);
-        self.pos = end;
-
-        return size;
-    }
-
-    fn seekToFn(in_stream: *SeekableInStream, pos: u64) SeekError!void {
-        const self = @fieldParentPtr(Self, "seekable_stream", in_stream);
-        const usize_pos = @intCast(usize, pos);
-        if (usize_pos > self.slice.len) return error.EndOfStream;
-        self.pos = usize_pos;
-    }
-
-    fn seekByFn(in_stream: *SeekableInStream, amt: i64) SeekError!void {
-        const self = @fieldParentPtr(Self, "seekable_stream", in_stream);
-
-        if (amt < 0) {
-            const abs_amt = @intCast(usize, -amt);
-            if (abs_amt > self.pos) return error.EndOfStream;
-            self.pos -= abs_amt;
-        } else {
-            const usize_amt = @intCast(usize, amt);
-            if (self.pos + usize_amt > self.slice.len) return error.EndOfStream;
-            self.pos += usize_amt;
-        }
-    }
-
-    fn getEndPosFn(in_stream: *SeekableInStream) GetSeekPosError!u64 {
-        const self = @fieldParentPtr(Self, "seekable_stream", in_stream);
-        return @intCast(u64, self.slice.len);
-    }
-
-    fn getPosFn(in_stream: *SeekableInStream) GetSeekPosError!u64 {
-        const self = @fieldParentPtr(Self, "seekable_stream", in_stream);
-        return @intCast(u64, self.pos);
-    }
-};
diff --git a/lib/std/io/serialization.zig b/lib/std/io/serialization.zig
new file mode 100644
index 0000000000..9b96b844e1
--- /dev/null
+++ b/lib/std/io/serialization.zig
@@ -0,0 +1,602 @@
+const std = @import("../std.zig");
+const builtin = std.builtin;
+const io = std.io;
+
+pub const Packing = enum {
+    /// Pack data to byte alignment
+    Byte,
+
+    /// Pack data to bit alignment
+    Bit,
+};
+
+/// Creates a deserializer that deserializes types from any stream.
+///  If `is_packed` is true, the data stream is treated as bit-packed,
+///  otherwise data is expected to be packed to the smallest byte.
+///  Types may implement a custom deserialization routine with a
+///  function named `deserialize` in the form of:
+///    pub fn deserialize(self: *Self, deserializer: var) !void
+///  which will be called when the deserializer is used to deserialize
+///  that type. It will pass a pointer to the type instance to deserialize
+///  into and a pointer to the deserializer struct.
+pub fn Deserializer(comptime endian: builtin.Endian, comptime packing: Packing, comptime InStreamType: type) type {
+    return struct {
+        in_stream: if (packing == .Bit) io.BitInStream(endian, InStreamType) else InStreamType,
+
+        const Self = @This();
+
+        pub fn init(in_stream: InStreamType) Self {
+            return Self{
+                .in_stream = switch (packing) {
+                    .Bit => io.bitInStream(endian, in_stream),
+                    .Byte => in_stream,
+                },
+            };
+        }
+
+        pub fn alignToByte(self: *Self) void {
+            if (packing == .Byte) return;
+            self.in_stream.alignToByte();
+        }
+
+        //@BUG: inferred error issue. See: #1386
+        fn deserializeInt(self: *Self, comptime T: type) (InStreamType.Error || error{EndOfStream})!T {
+            comptime assert(trait.is(.Int)(T) or trait.is(.Float)(T));
+
+            const u8_bit_count = 8;
+            const t_bit_count = comptime meta.bitCount(T);
+
+            const U = std.meta.IntType(false, t_bit_count);
+            const Log2U = math.Log2Int(U);
+            const int_size = (U.bit_count + 7) / 8;
+
+            if (packing == .Bit) {
+                const result = try self.in_stream.readBitsNoEof(U, t_bit_count);
+                return @bitCast(T, result);
+            }
+
+            var buffer: [int_size]u8 = undefined;
+            const read_size = try self.in_stream.read(buffer[0..]);
+            if (read_size < int_size) return error.EndOfStream;
+
+            if (int_size == 1) {
+                if (t_bit_count == 8) return @bitCast(T, buffer[0]);
+                const PossiblySignedByte = std.meta.IntType(T.is_signed, 8);
+                return @truncate(T, @bitCast(PossiblySignedByte, buffer[0]));
+            }
+
+            var result = @as(U, 0);
+            for (buffer) |byte, i| {
+                switch (endian) {
+                    .Big => {
+                        result = (result << u8_bit_count) | byte;
+                    },
+                    .Little => {
+                        result |= @as(U, byte) << @intCast(Log2U, u8_bit_count * i);
+                    },
+                }
+            }
+
+            return @bitCast(T, result);
+        }
+
+        /// Deserializes and returns data of the specified type from the stream
+        pub fn deserialize(self: *Self, comptime T: type) !T {
+            var value: T = undefined;
+            try self.deserializeInto(&value);
+            return value;
+        }
+
+        /// Deserializes data into the type pointed to by `ptr`
+        pub fn deserializeInto(self: *Self, ptr: var) !void {
+            const T = @TypeOf(ptr);
+            comptime assert(trait.is(.Pointer)(T));
+
+            if (comptime trait.isSlice(T) or comptime trait.isPtrTo(.Array)(T)) {
+                for (ptr) |*v|
+                    try self.deserializeInto(v);
+                return;
+            }
+
+            comptime assert(trait.isSingleItemPtr(T));
+
+            const C = comptime meta.Child(T);
+            const child_type_id = @typeInfo(C);
+
+            //custom deserializer: fn(self: *Self, deserializer: var) !void
+            if (comptime trait.hasFn("deserialize")(C)) return C.deserialize(ptr, self);
+
+            if (comptime trait.isPacked(C) and packing != .Bit) {
+                var packed_deserializer = deserializer(endian, .Bit, self.in_stream);
+                return packed_deserializer.deserializeInto(ptr);
+            }
+
+            switch (child_type_id) {
+                .Void => return,
+                .Bool => ptr.* = (try self.deserializeInt(u1)) > 0,
+                .Float, .Int => ptr.* = try self.deserializeInt(C),
+                .Struct => {
+                    const info = @typeInfo(C).Struct;
+
+                    inline for (info.fields) |*field_info| {
+                        const name = field_info.name;
+                        const FieldType = field_info.field_type;
+
+                        if (FieldType == void or FieldType == u0) continue;
+
+                        //it doesn't make any sense to read pointers
+                        if (comptime trait.is(.Pointer)(FieldType)) {
+                            @compileError("Will not " ++ "read field " ++ name ++ " of struct " ++
+                                @typeName(C) ++ " because it " ++ "is of pointer-type " ++
+                                @typeName(FieldType) ++ ".");
+                        }
+
+                        try self.deserializeInto(&@field(ptr, name));
+                    }
+                },
+                .Union => {
+                    const info = @typeInfo(C).Union;
+                    if (info.tag_type) |TagType| {
+                        //we avoid duplicate iteration over the enum tags
+                        // by getting the int directly and casting it without
+                        // safety. If it is bad, it will be caught anyway.
+                        const TagInt = @TagType(TagType);
+                        const tag = try self.deserializeInt(TagInt);
+
+                        inline for (info.fields) |field_info| {
+                            if (field_info.enum_field.?.value == tag) {
+                                const name = field_info.name;
+                                const FieldType = field_info.field_type;
+                                ptr.* = @unionInit(C, name, undefined);
+                                try self.deserializeInto(&@field(ptr, name));
+                                return;
+                            }
+                        }
+                        //This is reachable if the enum data is bad
+                        return error.InvalidEnumTag;
+                    }
+                    @compileError("Cannot meaningfully deserialize " ++ @typeName(C) ++
+                        " because it is an untagged union. Use a custom deserialize().");
+                },
+                .Optional => {
+                    const OC = comptime meta.Child(C);
+                    const exists = (try self.deserializeInt(u1)) > 0;
+                    if (!exists) {
+                        ptr.* = null;
+                        return;
+                    }
+
+                    ptr.* = @as(OC, undefined); //make it non-null so the following .? is guaranteed safe
+                    const val_ptr = &ptr.*.?;
+                    try self.deserializeInto(val_ptr);
+                },
+                .Enum => {
+                    var value = try self.deserializeInt(@TagType(C));
+                    ptr.* = try meta.intToEnum(C, value);
+                },
+                else => {
+                    @compileError("Cannot deserialize " ++ @tagName(child_type_id) ++ " types (unimplemented).");
+                },
+            }
+        }
+    };
+}
+
+pub fn deserializer(
+    comptime endian: builtin.Endian,
+    comptime packing: Packing,
+    in_stream: var,
+) Deserializer(endian, packing, @TypeOf(in_stream)) {
+    return Deserializer(endian, packing, @TypeOf(in_stream)).init(in_stream);
+}
+
+/// Creates a serializer that serializes types to any stream.
+///  If `is_packed` is true, the data will be bit-packed into the stream.
+///  Note that the you must call `serializer.flush()` when you are done
+///  writing bit-packed data in order ensure any unwritten bits are committed.
+///  If `is_packed` is false, data is packed to the smallest byte. In the case
+///  of packed structs, the struct will written bit-packed and with the specified
+///  endianess, after which data will resume being written at the next byte boundary.
+///  Types may implement a custom serialization routine with a
+///  function named `serialize` in the form of:
+///    pub fn serialize(self: Self, serializer: var) !void
+///  which will be called when the serializer is used to serialize that type. It will
+///  pass a const pointer to the type instance to be serialized and a pointer
+///  to the serializer struct.
+pub fn Serializer(comptime endian: builtin.Endian, comptime packing: Packing, comptime OutStreamType: type) type {
+    return struct {
+        out_stream: if (packing == .Bit) BitOutStream(endian, OutStreamType) else OutStreamType,
+
+        const Self = @This();
+        pub const Error = OutStreamType.Error;
+
+        pub fn init(out_stream: OutStreamType) Self {
+            return Self{
+                .out_stream = switch (packing) {
+                    .Bit => io.bitOutStream(endian, out_stream),
+                    .Byte => out_stream,
+                },
+            };
+        }
+
+        /// Flushes any unwritten bits to the stream
+        pub fn flush(self: *Self) Error!void {
+            if (packing == .Bit) return self.out_stream.flushBits();
+        }
+
+        fn serializeInt(self: *Self, value: var) Error!void {
+            const T = @TypeOf(value);
+            comptime assert(trait.is(.Int)(T) or trait.is(.Float)(T));
+
+            const t_bit_count = comptime meta.bitCount(T);
+            const u8_bit_count = comptime meta.bitCount(u8);
+
+            const U = std.meta.IntType(false, t_bit_count);
+            const Log2U = math.Log2Int(U);
+            const int_size = (U.bit_count + 7) / 8;
+
+            const u_value = @bitCast(U, value);
+
+            if (packing == .Bit) return self.out_stream.writeBits(u_value, t_bit_count);
+
+            var buffer: [int_size]u8 = undefined;
+            if (int_size == 1) buffer[0] = u_value;
+
+            for (buffer) |*byte, i| {
+                const idx = switch (endian) {
+                    .Big => int_size - i - 1,
+                    .Little => i,
+                };
+                const shift = @intCast(Log2U, idx * u8_bit_count);
+                const v = u_value >> shift;
+                byte.* = if (t_bit_count < u8_bit_count) v else @truncate(u8, v);
+            }
+
+            try self.out_stream.write(&buffer);
+        }
+
+        /// Serializes the passed value into the stream
+        pub fn serialize(self: *Self, value: var) Error!void {
+            const T = comptime @TypeOf(value);
+
+            if (comptime trait.isIndexable(T)) {
+                for (value) |v|
+                    try self.serialize(v);
+                return;
+            }
+
+            //custom serializer: fn(self: Self, serializer: var) !void
+            if (comptime trait.hasFn("serialize")(T)) return T.serialize(value, self);
+
+            if (comptime trait.isPacked(T) and packing != .Bit) {
+                var packed_serializer = Serializer(endian, .Bit, Error).init(self.out_stream);
+                try packed_serializer.serialize(value);
+                try packed_serializer.flush();
+                return;
+            }
+
+            switch (@typeInfo(T)) {
+                .Void => return,
+                .Bool => try self.serializeInt(@as(u1, @boolToInt(value))),
+                .Float, .Int => try self.serializeInt(value),
+                .Struct => {
+                    const info = @typeInfo(T);
+
+                    inline for (info.Struct.fields) |*field_info| {
+                        const name = field_info.name;
+                        const FieldType = field_info.field_type;
+
+                        if (FieldType == void or FieldType == u0) continue;
+
+                        //It doesn't make sense to write pointers
+                        if (comptime trait.is(.Pointer)(FieldType)) {
+                            @compileError("Will not " ++ "serialize field " ++ name ++
+                                " of struct " ++ @typeName(T) ++ " because it " ++
+                                "is of pointer-type " ++ @typeName(FieldType) ++ ".");
+                        }
+                        try self.serialize(@field(value, name));
+                    }
+                },
+                .Union => {
+                    const info = @typeInfo(T).Union;
+                    if (info.tag_type) |TagType| {
+                        const active_tag = meta.activeTag(value);
+                        try self.serialize(active_tag);
+                        //This inline loop is necessary because active_tag is a runtime
+                        // value, but @field requires a comptime value. Our alternative
+                        // is to check each field for a match
+                        inline for (info.fields) |field_info| {
+                            if (field_info.enum_field.?.value == @enumToInt(active_tag)) {
+                                const name = field_info.name;
+                                const FieldType = field_info.field_type;
+                                try self.serialize(@field(value, name));
+                                return;
+                            }
+                        }
+                        unreachable;
+                    }
+                    @compileError("Cannot meaningfully serialize " ++ @typeName(T) ++
+                        " because it is an untagged union. Use a custom serialize().");
+                },
+                .Optional => {
+                    if (value == null) {
+                        try self.serializeInt(@as(u1, @boolToInt(false)));
+                        return;
+                    }
+                    try self.serializeInt(@as(u1, @boolToInt(true)));
+
+                    const OC = comptime meta.Child(T);
+                    const val_ptr = &value.?;
+                    try self.serialize(val_ptr.*);
+                },
+                .Enum => {
+                    try self.serializeInt(@enumToInt(value));
+                },
+                else => @compileError("Cannot serialize " ++ @tagName(@typeInfo(T)) ++ " types (unimplemented)."),
+            }
+        }
+    };
+}
+
+pub fn serializer(
+    comptime endian: builtin.Endian,
+    comptime packing: Packing,
+    out_stream: var,
+) Serializer(endian, packing, @TypeOf(out_stream)) {
+    return Serializer(endian, packing, @TypeOf(out_stream)).init(out_stream);
+}
+
+fn testIntSerializerDeserializer(comptime endian: builtin.Endian, comptime packing: io.Packing) !void {
+    @setEvalBranchQuota(1500);
+    //@NOTE: if this test is taking too long, reduce the maximum tested bitsize
+    const max_test_bitsize = 128;
+
+    const total_bytes = comptime blk: {
+        var bytes = 0;
+        comptime var i = 0;
+        while (i <= max_test_bitsize) : (i += 1) bytes += (i / 8) + @boolToInt(i % 8 > 0);
+        break :blk bytes * 2;
+    };
+
+    var data_mem: [total_bytes]u8 = undefined;
+    var out = io.fixedBufferStream(&data_mem);
+    var serializer = serializer(endian, packing, out.outStream());
+
+    var in = io.fixedBufferStream(&data_mem);
+    var deserializer = Deserializer(endian, packing, in.inStream());
+
+    comptime var i = 0;
+    inline while (i <= max_test_bitsize) : (i += 1) {
+        const U = std.meta.IntType(false, i);
+        const S = std.meta.IntType(true, i);
+        try serializer.serializeInt(@as(U, i));
+        if (i != 0) try serializer.serializeInt(@as(S, -1)) else try serializer.serialize(@as(S, 0));
+    }
+    try serializer.flush();
+
+    i = 0;
+    inline while (i <= max_test_bitsize) : (i += 1) {
+        const U = std.meta.IntType(false, i);
+        const S = std.meta.IntType(true, i);
+        const x = try deserializer.deserializeInt(U);
+        const y = try deserializer.deserializeInt(S);
+        expect(x == @as(U, i));
+        if (i != 0) expect(y == @as(S, -1)) else expect(y == 0);
+    }
+
+    const u8_bit_count = comptime meta.bitCount(u8);
+    //0 + 1 + 2 + ... n = (n * (n + 1)) / 2
+    //and we have each for unsigned and signed, so * 2
+    const total_bits = (max_test_bitsize * (max_test_bitsize + 1));
+    const extra_packed_byte = @boolToInt(total_bits % u8_bit_count > 0);
+    const total_packed_bytes = (total_bits / u8_bit_count) + extra_packed_byte;
+
+    expect(in.pos == if (packing == .Bit) total_packed_bytes else total_bytes);
+
+    //Verify that empty error set works with serializer.
+    //deserializer is covered by FixedBufferStream
+    var null_serializer = io.serializer(endian, packing, std.io.null_out_stream);
+    try null_serializer.serialize(data_mem[0..]);
+    try null_serializer.flush();
+}
+
+test "Serializer/Deserializer Int" {
+    try testIntSerializerDeserializer(.Big, .Byte);
+    try testIntSerializerDeserializer(.Little, .Byte);
+    // TODO these tests are disabled due to tripping an LLVM assertion
+    // https://github.com/ziglang/zig/issues/2019
+    //try testIntSerializerDeserializer(builtin.Endian.Big, true);
+    //try testIntSerializerDeserializer(builtin.Endian.Little, true);
+}
+
+fn testIntSerializerDeserializerInfNaN(
+    comptime endian: builtin.Endian,
+    comptime packing: io.Packing,
+) !void {
+    const mem_size = (16 * 2 + 32 * 2 + 64 * 2 + 128 * 2) / comptime meta.bitCount(u8);
+    var data_mem: [mem_size]u8 = undefined;
+
+    var out = io.fixedBufferStream(&data_mem);
+    var serializer = serializer(endian, packing, out.outStream());
+
+    var in = io.fixedBufferStream(&data_mem);
+    var deserializer = deserializer(endian, packing, in.inStream());
+
+    //@TODO: isInf/isNan not currently implemented for f128.
+    try serializer.serialize(std.math.nan(f16));
+    try serializer.serialize(std.math.inf(f16));
+    try serializer.serialize(std.math.nan(f32));
+    try serializer.serialize(std.math.inf(f32));
+    try serializer.serialize(std.math.nan(f64));
+    try serializer.serialize(std.math.inf(f64));
+    //try serializer.serialize(std.math.nan(f128));
+    //try serializer.serialize(std.math.inf(f128));
+    const nan_check_f16 = try deserializer.deserialize(f16);
+    const inf_check_f16 = try deserializer.deserialize(f16);
+    const nan_check_f32 = try deserializer.deserialize(f32);
+    deserializer.alignToByte();
+    const inf_check_f32 = try deserializer.deserialize(f32);
+    const nan_check_f64 = try deserializer.deserialize(f64);
+    const inf_check_f64 = try deserializer.deserialize(f64);
+    //const nan_check_f128 = try deserializer.deserialize(f128);
+    //const inf_check_f128 = try deserializer.deserialize(f128);
+    expect(std.math.isNan(nan_check_f16));
+    expect(std.math.isInf(inf_check_f16));
+    expect(std.math.isNan(nan_check_f32));
+    expect(std.math.isInf(inf_check_f32));
+    expect(std.math.isNan(nan_check_f64));
+    expect(std.math.isInf(inf_check_f64));
+    //expect(std.math.isNan(nan_check_f128));
+    //expect(std.math.isInf(inf_check_f128));
+}
+
+test "Serializer/Deserializer Int: Inf/NaN" {
+    try testIntSerializerDeserializerInfNaN(.Big, .Byte);
+    try testIntSerializerDeserializerInfNaN(.Little, .Byte);
+    try testIntSerializerDeserializerInfNaN(.Big, .Bit);
+    try testIntSerializerDeserializerInfNaN(.Little, .Bit);
+}
+
+fn testAlternateSerializer(self: var, serializer: var) !void {
+    try serializer.serialize(self.f_f16);
+}
+
+fn testSerializerDeserializer(comptime endian: builtin.Endian, comptime packing: io.Packing) !void {
+    const ColorType = enum(u4) {
+        RGB8 = 1,
+        RA16 = 2,
+        R32 = 3,
+    };
+
+    const TagAlign = union(enum(u32)) {
+        A: u8,
+        B: u8,
+        C: u8,
+    };
+
+    const Color = union(ColorType) {
+        RGB8: struct {
+            r: u8,
+            g: u8,
+            b: u8,
+            a: u8,
+        },
+        RA16: struct {
+            r: u16,
+            a: u16,
+        },
+        R32: u32,
+    };
+
+    const PackedStruct = packed struct {
+        f_i3: i3,
+        f_u2: u2,
+    };
+
+    //to test custom serialization
+    const Custom = struct {
+        f_f16: f16,
+        f_unused_u32: u32,
+
+        pub fn deserialize(self: *@This(), deserializer: var) !void {
+            try deserializer.deserializeInto(&self.f_f16);
+            self.f_unused_u32 = 47;
+        }
+
+        pub const serialize = testAlternateSerializer;
+    };
+
+    const MyStruct = struct {
+        f_i3: i3,
+        f_u8: u8,
+        f_tag_align: TagAlign,
+        f_u24: u24,
+        f_i19: i19,
+        f_void: void,
+        f_f32: f32,
+        f_f128: f128,
+        f_packed_0: PackedStruct,
+        f_i7arr: [10]i7,
+        f_of64n: ?f64,
+        f_of64v: ?f64,
+        f_color_type: ColorType,
+        f_packed_1: PackedStruct,
+        f_custom: Custom,
+        f_color: Color,
+    };
+
+    const my_inst = MyStruct{
+        .f_i3 = -1,
+        .f_u8 = 8,
+        .f_tag_align = TagAlign{ .B = 148 },
+        .f_u24 = 24,
+        .f_i19 = 19,
+        .f_void = {},
+        .f_f32 = 32.32,
+        .f_f128 = 128.128,
+        .f_packed_0 = PackedStruct{ .f_i3 = -1, .f_u2 = 2 },
+        .f_i7arr = [10]i7{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
+        .f_of64n = null,
+        .f_of64v = 64.64,
+        .f_color_type = ColorType.R32,
+        .f_packed_1 = PackedStruct{ .f_i3 = 1, .f_u2 = 1 },
+        .f_custom = Custom{ .f_f16 = 38.63, .f_unused_u32 = 47 },
+        .f_color = Color{ .R32 = 123822 },
+    };
+
+    var data_mem: [@sizeOf(MyStruct)]u8 = undefined;
+    var out = io.fixedBufferStream(&data_mem);
+    var serializer = serializer(endian, packing, out.outStream());
+
+    var in = io.fixedBufferStream(&data_mem);
+    var deserializer = deserializer(endian, packing, in.inStream());
+
+    try serializer.serialize(my_inst);
+
+    const my_copy = try deserializer.deserialize(MyStruct);
+    expect(meta.eql(my_copy, my_inst));
+}
+
+test "Serializer/Deserializer generic" {
+    try testSerializerDeserializer(builtin.Endian.Big, .Byte);
+    try testSerializerDeserializer(builtin.Endian.Little, .Byte);
+    try testSerializerDeserializer(builtin.Endian.Big, .Bit);
+    try testSerializerDeserializer(builtin.Endian.Little, .Bit);
+}
+
+fn testBadData(comptime endian: builtin.Endian, comptime packing: io.Packing) !void {
+    const E = enum(u14) {
+        One = 1,
+        Two = 2,
+    };
+
+    const A = struct {
+        e: E,
+    };
+
+    const C = union(E) {
+        One: u14,
+        Two: f16,
+    };
+
+    var data_mem: [4]u8 = undefined;
+    var out = io.fixedBufferStream.init(&data_mem);
+    var serializer = serializer(endian, packing, out.outStream());
+
+    var in = io.fixedBufferStream(&data_mem);
+    var deserializer = deserializer(endian, packing, in.inStream());
+
+    try serializer.serialize(@as(u14, 3));
+    expectError(error.InvalidEnumTag, deserializer.deserialize(A));
+    out.pos = 0;
+    try serializer.serialize(@as(u14, 3));
+    try serializer.serialize(@as(u14, 88));
+    expectError(error.InvalidEnumTag, deserializer.deserialize(C));
+}
+
+test "Deserializer bad data" {
+    try testBadData(.Big, .Byte);
+    try testBadData(.Little, .Byte);
+    try testBadData(.Big, .Bit);
+    try testBadData(.Little, .Bit);
+}
diff --git a/lib/std/io/stream_source.zig b/lib/std/io/stream_source.zig
new file mode 100644
index 0000000000..7e39554337
--- /dev/null
+++ b/lib/std/io/stream_source.zig
@@ -0,0 +1,90 @@
+const std = @import("../std.zig");
+const io = std.io;
+const testing = std.testing;
+
+/// Provides `io.InStream`, `io.OutStream`, and `io.SeekableStream` for in-memory buffers as
+/// well as files.
+/// For memory sources, if the supplied byte buffer is const, then `io.OutStream` is not available.
+/// The error set of the stream functions is the error set of the corresponding file functions.
+pub const StreamSource = union(enum) {
+    buffer: io.FixedBufferStream([]u8),
+    const_buffer: io.FixedBufferStream([]const u8),
+    file: std.fs.File,
+
+    pub const ReadError = std.fs.File.ReadError;
+    pub const WriteError = std.fs.File.WriteError;
+    pub const SeekError = std.fs.File.SeekError;
+    pub const GetSeekPosError = std.fs.File.GetPosError;
+
+    pub const InStream = io.InStream(*StreamSource, ReadError, read);
+    pub const OutStream = io.OutStream(*StreamSource, WriteError, write);
+    pub const SeekableStream = io.SeekableStream(
+        *StreamSource,
+        SeekError,
+        GetSeekPosError,
+        seekTo,
+        seekBy,
+        getPos,
+        getEndPos,
+    );
+
+    pub fn read(self: *StreamSource, dest: []u8) ReadError!usize {
+        switch (self.*) {
+            .buffer => |*x| return x.read(dest),
+            .const_buffer => |*x| return x.read(dest),
+            .file => |x| return x.read(dest),
+        }
+    }
+
+    pub fn write(self: *StreamSource, bytes: []const u8) WriteError!usize {
+        switch (self.*) {
+            .buffer => |*x| return x.write(bytes),
+            .const_buffer => |*x| return x.write(bytes),
+            .file => |x| return x.write(bytes),
+        }
+    }
+
+    pub fn seekTo(self: *StreamSource, pos: u64) SeekError!void {
+        switch (self.*) {
+            .buffer => |*x| return x.seekTo(pos),
+            .const_buffer => |*x| return x.seekTo(pos),
+            .file => |x| return x.seekTo(pos),
+        }
+    }
+
+    pub fn seekBy(self: *StreamSource, amt: i64) SeekError!void {
+        switch (self.*) {
+            .buffer => |*x| return x.seekBy(amt),
+            .const_buffer => |*x| return x.seekBy(amt),
+            .file => |x| return x.seekBy(amt),
+        }
+    }
+
+    pub fn getEndPos(self: *StreamSource) GetSeekPosError!u64 {
+        switch (self.*) {
+            .buffer => |*x| return x.getEndPos(),
+            .const_buffer => |*x| return x.getEndPos(),
+            .file => |x| return x.getEndPos(),
+        }
+    }
+
+    pub fn getPos(self: *StreamSource) GetSeekPosError!u64 {
+        switch (self.*) {
+            .buffer => |*x| return x.getPos(),
+            .const_buffer => |*x| return x.getPos(),
+            .file => |x| return x.getPos(),
+        }
+    }
+
+    pub fn inStream(self: *StreamSource) InStream {
+        return .{ .context = self };
+    }
+
+    pub fn outStream(self: *StreamSource) OutStream {
+        return .{ .context = self };
+    }
+
+    pub fn seekableStream(self: *StreamSource) SeekableStream {
+        return .{ .context = self };
+    }
+};
diff --git a/lib/std/io/test.zig b/lib/std/io/test.zig
index bc194046f6..d8ee9612ea 100644
--- a/lib/std/io/test.zig
+++ b/lib/std/io/test.zig
@@ -1,5 +1,5 @@
-const builtin = @import("builtin");
-const std = @import("../std.zig");
+const std = @import("std");
+const builtin = std.builtin;
 const io = std.io;
 const meta = std.meta;
 const trait = std.trait;
@@ -22,11 +22,10 @@ test "write a file, read it, then delete it" {
         var file = try cwd.createFile(tmp_file_name, .{});
         defer file.close();
 
-        var file_out_stream = file.outStream();
-        var buf_stream = io.BufferedOutStream(File.WriteError).init(&file_out_stream.stream);
-        const st = &buf_stream.stream;
+        var buf_stream = io.bufferedOutStream(file.outStream());
+        const st = buf_stream.outStream();
         try st.print("begin", .{});
-        try st.write(data[0..]);
+        try st.writeAll(data[0..]);
         try st.print("end", .{});
         try buf_stream.flush();
     }
@@ -48,9 +47,8 @@ test "write a file, read it, then delete it" {
         const expected_file_size: u64 = "begin".len + data.len + "end".len;
         expectEqual(expected_file_size, file_size);
 
-        var file_in_stream = file.inStream();
-        var buf_stream = io.BufferedInStream(File.ReadError).init(&file_in_stream.stream);
-        const st = &buf_stream.stream;
+        var buf_stream = io.bufferedInStream(file.inStream());
+        const st = buf_stream.inStream();
         const contents = try st.readAllAlloc(std.testing.allocator, 2 * 1024);
         defer std.testing.allocator.free(contents);
 
@@ -61,224 +59,13 @@ test "write a file, read it, then delete it" {
     try cwd.deleteFile(tmp_file_name);
 }
 
-test "BufferOutStream" {
-    var buffer = try std.Buffer.initSize(std.testing.allocator, 0);
-    defer buffer.deinit();
-    var buf_stream = &std.io.BufferOutStream.init(&buffer).stream;
-
-    const x: i32 = 42;
-    const y: i32 = 1234;
-    try buf_stream.print("x: {}\ny: {}\n", .{ x, y });
-
-    expect(mem.eql(u8, buffer.toSlice(), "x: 42\ny: 1234\n"));
-}
-
-test "SliceInStream" {
-    const bytes = [_]u8{ 1, 2, 3, 4, 5, 6, 7 };
-    var ss = io.SliceInStream.init(&bytes);
-
-    var dest: [4]u8 = undefined;
-
-    var read = try ss.stream.read(dest[0..4]);
-    expect(read == 4);
-    expect(mem.eql(u8, dest[0..4], bytes[0..4]));
-
-    read = try ss.stream.read(dest[0..4]);
-    expect(read == 3);
-    expect(mem.eql(u8, dest[0..3], bytes[4..7]));
-
-    read = try ss.stream.read(dest[0..4]);
-    expect(read == 0);
-}
-
-test "PeekStream" {
-    const bytes = [_]u8{ 1, 2, 3, 4, 5, 6, 7, 8 };
-    var ss = io.SliceInStream.init(&bytes);
-    var ps = io.PeekStream(.{ .Static = 2 }, io.SliceInStream.Error).init(&ss.stream);
-
-    var dest: [4]u8 = undefined;
-
-    try ps.putBackByte(9);
-    try ps.putBackByte(10);
-
-    var read = try ps.stream.read(dest[0..4]);
-    expect(read == 4);
-    expect(dest[0] == 10);
-    expect(dest[1] == 9);
-    expect(mem.eql(u8, dest[2..4], bytes[0..2]));
-
-    read = try ps.stream.read(dest[0..4]);
-    expect(read == 4);
-    expect(mem.eql(u8, dest[0..4], bytes[2..6]));
-
-    read = try ps.stream.read(dest[0..4]);
-    expect(read == 2);
-    expect(mem.eql(u8, dest[0..2], bytes[6..8]));
-
-    try ps.putBackByte(11);
-    try ps.putBackByte(12);
-
-    read = try ps.stream.read(dest[0..4]);
-    expect(read == 2);
-    expect(dest[0] == 12);
-    expect(dest[1] == 11);
-}
-
-test "SliceOutStream" {
-    var buffer: [10]u8 = undefined;
-    var ss = io.SliceOutStream.init(buffer[0..]);
-
-    try ss.stream.write("Hello");
-    expect(mem.eql(u8, ss.getWritten(), "Hello"));
-
-    try ss.stream.write("world");
-    expect(mem.eql(u8, ss.getWritten(), "Helloworld"));
-
-    expectError(error.OutOfMemory, ss.stream.write("!"));
-    expect(mem.eql(u8, ss.getWritten(), "Helloworld"));
-
-    ss.reset();
-    expect(ss.getWritten().len == 0);
-
-    expectError(error.OutOfMemory, ss.stream.write("Hello world!"));
-    expect(mem.eql(u8, ss.getWritten(), "Hello worl"));
-}
-
-test "BitInStream" {
-    const mem_be = [_]u8{ 0b11001101, 0b00001011 };
-    const mem_le = [_]u8{ 0b00011101, 0b10010101 };
-
-    var mem_in_be = io.SliceInStream.init(mem_be[0..]);
-    const InError = io.SliceInStream.Error;
-    var bit_stream_be = io.BitInStream(builtin.Endian.Big, InError).init(&mem_in_be.stream);
-
-    var out_bits: usize = undefined;
-
-    expect(1 == try bit_stream_be.readBits(u2, 1, &out_bits));
-    expect(out_bits == 1);
-    expect(2 == try bit_stream_be.readBits(u5, 2, &out_bits));
-    expect(out_bits == 2);
-    expect(3 == try bit_stream_be.readBits(u128, 3, &out_bits));
-    expect(out_bits == 3);
-    expect(4 == try bit_stream_be.readBits(u8, 4, &out_bits));
-    expect(out_bits == 4);
-    expect(5 == try bit_stream_be.readBits(u9, 5, &out_bits));
-    expect(out_bits == 5);
-    expect(1 == try bit_stream_be.readBits(u1, 1, &out_bits));
-    expect(out_bits == 1);
-
-    mem_in_be.pos = 0;
-    bit_stream_be.bit_count = 0;
-    expect(0b110011010000101 == try bit_stream_be.readBits(u15, 15, &out_bits));
-    expect(out_bits == 15);
-
-    mem_in_be.pos = 0;
-    bit_stream_be.bit_count = 0;
-    expect(0b1100110100001011 == try bit_stream_be.readBits(u16, 16, &out_bits));
-    expect(out_bits == 16);
-
-    _ = try bit_stream_be.readBits(u0, 0, &out_bits);
-
-    expect(0 == try bit_stream_be.readBits(u1, 1, &out_bits));
-    expect(out_bits == 0);
-    expectError(error.EndOfStream, bit_stream_be.readBitsNoEof(u1, 1));
-
-    var mem_in_le = io.SliceInStream.init(mem_le[0..]);
-    var bit_stream_le = io.BitInStream(builtin.Endian.Little, InError).init(&mem_in_le.stream);
-
-    expect(1 == try bit_stream_le.readBits(u2, 1, &out_bits));
-    expect(out_bits == 1);
-    expect(2 == try bit_stream_le.readBits(u5, 2, &out_bits));
-    expect(out_bits == 2);
-    expect(3 == try bit_stream_le.readBits(u128, 3, &out_bits));
-    expect(out_bits == 3);
-    expect(4 == try bit_stream_le.readBits(u8, 4, &out_bits));
-    expect(out_bits == 4);
-    expect(5 == try bit_stream_le.readBits(u9, 5, &out_bits));
-    expect(out_bits == 5);
-    expect(1 == try bit_stream_le.readBits(u1, 1, &out_bits));
-    expect(out_bits == 1);
-
-    mem_in_le.pos = 0;
-    bit_stream_le.bit_count = 0;
-    expect(0b001010100011101 == try bit_stream_le.readBits(u15, 15, &out_bits));
-    expect(out_bits == 15);
-
-    mem_in_le.pos = 0;
-    bit_stream_le.bit_count = 0;
-    expect(0b1001010100011101 == try bit_stream_le.readBits(u16, 16, &out_bits));
-    expect(out_bits == 16);
-
-    _ = try bit_stream_le.readBits(u0, 0, &out_bits);
-
-    expect(0 == try bit_stream_le.readBits(u1, 1, &out_bits));
-    expect(out_bits == 0);
-    expectError(error.EndOfStream, bit_stream_le.readBitsNoEof(u1, 1));
-}
-
-test "BitOutStream" {
-    var mem_be = [_]u8{0} ** 2;
-    var mem_le = [_]u8{0} ** 2;
-
-    var mem_out_be = io.SliceOutStream.init(mem_be[0..]);
-    const OutError = io.SliceOutStream.Error;
-    var bit_stream_be = io.BitOutStream(builtin.Endian.Big, OutError).init(&mem_out_be.stream);
-
-    try bit_stream_be.writeBits(@as(u2, 1), 1);
-    try bit_stream_be.writeBits(@as(u5, 2), 2);
-    try bit_stream_be.writeBits(@as(u128, 3), 3);
-    try bit_stream_be.writeBits(@as(u8, 4), 4);
-    try bit_stream_be.writeBits(@as(u9, 5), 5);
-    try bit_stream_be.writeBits(@as(u1, 1), 1);
-
-    expect(mem_be[0] == 0b11001101 and mem_be[1] == 0b00001011);
-
-    mem_out_be.pos = 0;
-
-    try bit_stream_be.writeBits(@as(u15, 0b110011010000101), 15);
-    try bit_stream_be.flushBits();
-    expect(mem_be[0] == 0b11001101 and mem_be[1] == 0b00001010);
-
-    mem_out_be.pos = 0;
-    try bit_stream_be.writeBits(@as(u32, 0b110011010000101), 16);
-    expect(mem_be[0] == 0b01100110 and mem_be[1] == 0b10000101);
-
-    try bit_stream_be.writeBits(@as(u0, 0), 0);
-
-    var mem_out_le = io.SliceOutStream.init(mem_le[0..]);
-    var bit_stream_le = io.BitOutStream(builtin.Endian.Little, OutError).init(&mem_out_le.stream);
-
-    try bit_stream_le.writeBits(@as(u2, 1), 1);
-    try bit_stream_le.writeBits(@as(u5, 2), 2);
-    try bit_stream_le.writeBits(@as(u128, 3), 3);
-    try bit_stream_le.writeBits(@as(u8, 4), 4);
-    try bit_stream_le.writeBits(@as(u9, 5), 5);
-    try bit_stream_le.writeBits(@as(u1, 1), 1);
-
-    expect(mem_le[0] == 0b00011101 and mem_le[1] == 0b10010101);
-
-    mem_out_le.pos = 0;
-    try bit_stream_le.writeBits(@as(u15, 0b110011010000101), 15);
-    try bit_stream_le.flushBits();
-    expect(mem_le[0] == 0b10000101 and mem_le[1] == 0b01100110);
-
-    mem_out_le.pos = 0;
-    try bit_stream_le.writeBits(@as(u32, 0b1100110100001011), 16);
-    expect(mem_le[0] == 0b00001011 and mem_le[1] == 0b11001101);
-
-    try bit_stream_le.writeBits(@as(u0, 0), 0);
-}
-
 test "BitStreams with File Stream" {
     const tmp_file_name = "temp_test_file.txt";
     {
         var file = try fs.cwd().createFile(tmp_file_name, .{});
         defer file.close();
 
-        var file_out = file.outStream();
-        var file_out_stream = &file_out.stream;
-        const OutError = File.WriteError;
-        var bit_stream = io.BitOutStream(builtin.endian, OutError).init(file_out_stream);
+        var bit_stream = io.bitOutStream(builtin.endian, file.outStream());
 
         try bit_stream.writeBits(@as(u2, 1), 1);
         try bit_stream.writeBits(@as(u5, 2), 2);
@@ -292,10 +79,7 @@ test "BitStreams with File Stream" {
         var file = try fs.cwd().openFile(tmp_file_name, .{});
         defer file.close();
 
-        var file_in = file.inStream();
-        var file_in_stream = &file_in.stream;
-        const InError = File.ReadError;
-        var bit_stream = io.BitInStream(builtin.endian, InError).init(file_in_stream);
+        var bit_stream = io.bitInStream(builtin.endian, file.inStream());
 
         var out_bits: usize = undefined;
 
@@ -317,294 +101,6 @@ test "BitStreams with File Stream" {
     try fs.cwd().deleteFile(tmp_file_name);
 }
 
-fn testIntSerializerDeserializer(comptime endian: builtin.Endian, comptime packing: io.Packing) !void {
-    @setEvalBranchQuota(1500);
-    //@NOTE: if this test is taking too long, reduce the maximum tested bitsize
-    const max_test_bitsize = 128;
-
-    const total_bytes = comptime blk: {
-        var bytes = 0;
-        comptime var i = 0;
-        while (i <= max_test_bitsize) : (i += 1) bytes += (i / 8) + @boolToInt(i % 8 > 0);
-        break :blk bytes * 2;
-    };
-
-    var data_mem: [total_bytes]u8 = undefined;
-    var out = io.SliceOutStream.init(data_mem[0..]);
-    const OutError = io.SliceOutStream.Error;
-    var out_stream = &out.stream;
-    var serializer = io.Serializer(endian, packing, OutError).init(out_stream);
-
-    var in = io.SliceInStream.init(data_mem[0..]);
-    const InError = io.SliceInStream.Error;
-    var in_stream = &in.stream;
-    var deserializer = io.Deserializer(endian, packing, InError).init(in_stream);
-
-    comptime var i = 0;
-    inline while (i <= max_test_bitsize) : (i += 1) {
-        const U = std.meta.IntType(false, i);
-        const S = std.meta.IntType(true, i);
-        try serializer.serializeInt(@as(U, i));
-        if (i != 0) try serializer.serializeInt(@as(S, -1)) else try serializer.serialize(@as(S, 0));
-    }
-    try serializer.flush();
-
-    i = 0;
-    inline while (i <= max_test_bitsize) : (i += 1) {
-        const U = std.meta.IntType(false, i);
-        const S = std.meta.IntType(true, i);
-        const x = try deserializer.deserializeInt(U);
-        const y = try deserializer.deserializeInt(S);
-        expect(x == @as(U, i));
-        if (i != 0) expect(y == @as(S, -1)) else expect(y == 0);
-    }
-
-    const u8_bit_count = comptime meta.bitCount(u8);
-    //0 + 1 + 2 + ... n = (n * (n + 1)) / 2
-    //and we have each for unsigned and signed, so * 2
-    const total_bits = (max_test_bitsize * (max_test_bitsize + 1));
-    const extra_packed_byte = @boolToInt(total_bits % u8_bit_count > 0);
-    const total_packed_bytes = (total_bits / u8_bit_count) + extra_packed_byte;
-
-    expect(in.pos == if (packing == .Bit) total_packed_bytes else total_bytes);
-
-    //Verify that empty error set works with serializer.
-    //deserializer is covered by SliceInStream
-    const NullError = io.NullOutStream.Error;
-    var null_out = io.NullOutStream.init();
-    var null_out_stream = &null_out.stream;
-    var null_serializer = io.Serializer(endian, packing, NullError).init(null_out_stream);
-    try null_serializer.serialize(data_mem[0..]);
-    try null_serializer.flush();
-}
-
-test "Serializer/Deserializer Int" {
-    try testIntSerializerDeserializer(.Big, .Byte);
-    try testIntSerializerDeserializer(.Little, .Byte);
-    // TODO these tests are disabled due to tripping an LLVM assertion
-    // https://github.com/ziglang/zig/issues/2019
-    //try testIntSerializerDeserializer(builtin.Endian.Big, true);
-    //try testIntSerializerDeserializer(builtin.Endian.Little, true);
-}
-
-fn testIntSerializerDeserializerInfNaN(
-    comptime endian: builtin.Endian,
-    comptime packing: io.Packing,
-) !void {
-    const mem_size = (16 * 2 + 32 * 2 + 64 * 2 + 128 * 2) / comptime meta.bitCount(u8);
-    var data_mem: [mem_size]u8 = undefined;
-
-    var out = io.SliceOutStream.init(data_mem[0..]);
-    const OutError = io.SliceOutStream.Error;
-    var out_stream = &out.stream;
-    var serializer = io.Serializer(endian, packing, OutError).init(out_stream);
-
-    var in = io.SliceInStream.init(data_mem[0..]);
-    const InError = io.SliceInStream.Error;
-    var in_stream = &in.stream;
-    var deserializer = io.Deserializer(endian, packing, InError).init(in_stream);
-
-    //@TODO: isInf/isNan not currently implemented for f128.
-    try serializer.serialize(std.math.nan(f16));
-    try serializer.serialize(std.math.inf(f16));
-    try serializer.serialize(std.math.nan(f32));
-    try serializer.serialize(std.math.inf(f32));
-    try serializer.serialize(std.math.nan(f64));
-    try serializer.serialize(std.math.inf(f64));
-    //try serializer.serialize(std.math.nan(f128));
-    //try serializer.serialize(std.math.inf(f128));
-    const nan_check_f16 = try deserializer.deserialize(f16);
-    const inf_check_f16 = try deserializer.deserialize(f16);
-    const nan_check_f32 = try deserializer.deserialize(f32);
-    deserializer.alignToByte();
-    const inf_check_f32 = try deserializer.deserialize(f32);
-    const nan_check_f64 = try deserializer.deserialize(f64);
-    const inf_check_f64 = try deserializer.deserialize(f64);
-    //const nan_check_f128 = try deserializer.deserialize(f128);
-    //const inf_check_f128 = try deserializer.deserialize(f128);
-    expect(std.math.isNan(nan_check_f16));
-    expect(std.math.isInf(inf_check_f16));
-    expect(std.math.isNan(nan_check_f32));
-    expect(std.math.isInf(inf_check_f32));
-    expect(std.math.isNan(nan_check_f64));
-    expect(std.math.isInf(inf_check_f64));
-    //expect(std.math.isNan(nan_check_f128));
-    //expect(std.math.isInf(inf_check_f128));
-}
-
-test "Serializer/Deserializer Int: Inf/NaN" {
-    try testIntSerializerDeserializerInfNaN(.Big, .Byte);
-    try testIntSerializerDeserializerInfNaN(.Little, .Byte);
-    try testIntSerializerDeserializerInfNaN(.Big, .Bit);
-    try testIntSerializerDeserializerInfNaN(.Little, .Bit);
-}
-
-fn testAlternateSerializer(self: var, serializer: var) !void {
-    try serializer.serialize(self.f_f16);
-}
-
-fn testSerializerDeserializer(comptime endian: builtin.Endian, comptime packing: io.Packing) !void {
-    const ColorType = enum(u4) {
-        RGB8 = 1,
-        RA16 = 2,
-        R32 = 3,
-    };
-
-    const TagAlign = union(enum(u32)) {
-        A: u8,
-        B: u8,
-        C: u8,
-    };
-
-    const Color = union(ColorType) {
-        RGB8: struct {
-            r: u8,
-            g: u8,
-            b: u8,
-            a: u8,
-        },
-        RA16: struct {
-            r: u16,
-            a: u16,
-        },
-        R32: u32,
-    };
-
-    const PackedStruct = packed struct {
-        f_i3: i3,
-        f_u2: u2,
-    };
-
-    //to test custom serialization
-    const Custom = struct {
-        f_f16: f16,
-        f_unused_u32: u32,
-
-        pub fn deserialize(self: *@This(), deserializer: var) !void {
-            try deserializer.deserializeInto(&self.f_f16);
-            self.f_unused_u32 = 47;
-        }
-
-        pub const serialize = testAlternateSerializer;
-    };
-
-    const MyStruct = struct {
-        f_i3: i3,
-        f_u8: u8,
-        f_tag_align: TagAlign,
-        f_u24: u24,
-        f_i19: i19,
-        f_void: void,
-        f_f32: f32,
-        f_f128: f128,
-        f_packed_0: PackedStruct,
-        f_i7arr: [10]i7,
-        f_of64n: ?f64,
-        f_of64v: ?f64,
-        f_color_type: ColorType,
-        f_packed_1: PackedStruct,
-        f_custom: Custom,
-        f_color: Color,
-    };
-
-    const my_inst = MyStruct{
-        .f_i3 = -1,
-        .f_u8 = 8,
-        .f_tag_align = TagAlign{ .B = 148 },
-        .f_u24 = 24,
-        .f_i19 = 19,
-        .f_void = {},
-        .f_f32 = 32.32,
-        .f_f128 = 128.128,
-        .f_packed_0 = PackedStruct{ .f_i3 = -1, .f_u2 = 2 },
-        .f_i7arr = [10]i7{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
-        .f_of64n = null,
-        .f_of64v = 64.64,
-        .f_color_type = ColorType.R32,
-        .f_packed_1 = PackedStruct{ .f_i3 = 1, .f_u2 = 1 },
-        .f_custom = Custom{ .f_f16 = 38.63, .f_unused_u32 = 47 },
-        .f_color = Color{ .R32 = 123822 },
-    };
-
-    var data_mem: [@sizeOf(MyStruct)]u8 = undefined;
-    var out = io.SliceOutStream.init(data_mem[0..]);
-    const OutError = io.SliceOutStream.Error;
-    var out_stream = &out.stream;
-    var serializer = io.Serializer(endian, packing, OutError).init(out_stream);
-
-    var in = io.SliceInStream.init(data_mem[0..]);
-    const InError = io.SliceInStream.Error;
-    var in_stream = &in.stream;
-    var deserializer = io.Deserializer(endian, packing, InError).init(in_stream);
-
-    try serializer.serialize(my_inst);
-
-    const my_copy = try deserializer.deserialize(MyStruct);
-    expect(meta.eql(my_copy, my_inst));
-}
-
-test "Serializer/Deserializer generic" {
-    try testSerializerDeserializer(builtin.Endian.Big, .Byte);
-    try testSerializerDeserializer(builtin.Endian.Little, .Byte);
-    try testSerializerDeserializer(builtin.Endian.Big, .Bit);
-    try testSerializerDeserializer(builtin.Endian.Little, .Bit);
-}
-
-fn testBadData(comptime endian: builtin.Endian, comptime packing: io.Packing) !void {
-    const E = enum(u14) {
-        One = 1,
-        Two = 2,
-    };
-
-    const A = struct {
-        e: E,
-    };
-
-    const C = union(E) {
-        One: u14,
-        Two: f16,
-    };
-
-    var data_mem: [4]u8 = undefined;
-    var out = io.SliceOutStream.init(data_mem[0..]);
-    const OutError = io.SliceOutStream.Error;
-    var out_stream = &out.stream;
-    var serializer = io.Serializer(endian, packing, OutError).init(out_stream);
-
-    var in = io.SliceInStream.init(data_mem[0..]);
-    const InError = io.SliceInStream.Error;
-    var in_stream = &in.stream;
-    var deserializer = io.Deserializer(endian, packing, InError).init(in_stream);
-
-    try serializer.serialize(@as(u14, 3));
-    expectError(error.InvalidEnumTag, deserializer.deserialize(A));
-    out.pos = 0;
-    try serializer.serialize(@as(u14, 3));
-    try serializer.serialize(@as(u14, 88));
-    expectError(error.InvalidEnumTag, deserializer.deserialize(C));
-}
-
-test "Deserializer bad data" {
-    try testBadData(.Big, .Byte);
-    try testBadData(.Little, .Byte);
-    try testBadData(.Big, .Bit);
-    try testBadData(.Little, .Bit);
-}
-
-test "c out stream" {
-    if (!builtin.link_libc) return error.SkipZigTest;
-
-    const filename = "tmp_io_test_file.txt";
-    const out_file = std.c.fopen(filename, "w") orelse return error.UnableToOpenTestFile;
-    defer {
-        _ = std.c.fclose(out_file);
-        fs.cwd().deleteFileC(filename) catch {};
-    }
-
-    const out_stream = &io.COutStream.init(out_file).stream;
-    try out_stream.print("hi: {}\n", .{@as(i32, 123)});
-}
-
 test "File seek ops" {
     const tmp_file_name = "temp_test_file.txt";
     var file = try fs.cwd().createFile(tmp_file_name, .{});
@@ -617,16 +113,39 @@ test "File seek ops" {
 
     // Seek to the end
     try file.seekFromEnd(0);
-    std.testing.expect((try file.getPos()) == try file.getEndPos());
+    expect((try file.getPos()) == try file.getEndPos());
     // Negative delta
     try file.seekBy(-4096);
-    std.testing.expect((try file.getPos()) == 4096);
+    expect((try file.getPos()) == 4096);
     // Positive delta
     try file.seekBy(10);
-    std.testing.expect((try file.getPos()) == 4106);
+    expect((try file.getPos()) == 4106);
     // Absolute position
     try file.seekTo(1234);
-    std.testing.expect((try file.getPos()) == 1234);
+    expect((try file.getPos()) == 1234);
+}
+
+test "setEndPos" {
+    const tmp_file_name = "temp_test_file.txt";
+    var file = try fs.cwd().createFile(tmp_file_name, .{});
+    defer {
+        file.close();
+        fs.cwd().deleteFile(tmp_file_name) catch {};
+    }
+
+    // Verify that the file size changes and the file offset is not moved
+    std.testing.expect((try file.getEndPos()) == 0);
+    std.testing.expect((try file.getPos()) == 0);
+    try file.setEndPos(8192);
+    std.testing.expect((try file.getEndPos()) == 8192);
+    std.testing.expect((try file.getPos()) == 0);
+    try file.seekTo(100);
+    try file.setEndPos(4096);
+    std.testing.expect((try file.getEndPos()) == 4096);
+    std.testing.expect((try file.getPos()) == 100);
+    try file.setEndPos(0);
+    std.testing.expect((try file.getEndPos()) == 0);
+    std.testing.expect((try file.getPos()) == 100);
 }
 
 test "updateTimes" {
@@ -643,6 +162,6 @@ test "updateTimes" {
         stat_old.mtime - 5 * std.time.ns_per_s,
     );
     var stat_new = try file.stat();
-    std.testing.expect(stat_new.atime < stat_old.atime);
-    std.testing.expect(stat_new.mtime < stat_old.mtime);
+    expect(stat_new.atime < stat_old.atime);
+    expect(stat_new.mtime < stat_old.mtime);
 }
diff --git a/lib/std/json.zig b/lib/std/json.zig
index bb59b4e0f3..f5a72d86da 100644
--- a/lib/std/json.zig
+++ b/lib/std/json.zig
@@ -10,6 +10,7 @@ const mem = std.mem;
 const maxInt = std.math.maxInt;
 
 pub const WriteStream = @import("json/write_stream.zig").WriteStream;
+pub const writeStream = @import("json/write_stream.zig").writeStream;
 
 const StringEscapes = union(enum) {
     None,
@@ -2107,9 +2108,9 @@ test "import more json tests" {
 test "write json then parse it" {
     var out_buffer: [1000]u8 = undefined;
 
-    var slice_out_stream = std.io.SliceOutStream.init(&out_buffer);
-    const out_stream = &slice_out_stream.stream;
-    var jw = WriteStream(@TypeOf(out_stream).Child, 4).init(out_stream);
+    var fixed_buffer_stream = std.io.fixedBufferStream(&out_buffer);
+    const out_stream = fixed_buffer_stream.outStream();
+    var jw = writeStream(out_stream, 4);
 
     try jw.beginObject();
 
@@ -2140,7 +2141,7 @@ test "write json then parse it" {
 
     var parser = Parser.init(testing.allocator, false);
     defer parser.deinit();
-    var tree = try parser.parse(slice_out_stream.getWritten());
+    var tree = try parser.parse(fixed_buffer_stream.getWritten());
     defer tree.deinit();
 
     testing.expect(tree.root.Object.get("f").?.value.Bool == false);
@@ -2251,45 +2252,43 @@ pub const StringifyOptions = struct {
 pub fn stringify(
     value: var,
     options: StringifyOptions,
-    context: var,
-    comptime Errors: type,
-    comptime output: fn (@TypeOf(context), []const u8) Errors!void,
-) Errors!void {
+    out_stream: var,
+) !void {
     const T = @TypeOf(value);
     switch (@typeInfo(T)) {
         .Float, .ComptimeFloat => {
-            return std.fmt.formatFloatScientific(value, std.fmt.FormatOptions{}, context, Errors, output);
+            return std.fmt.formatFloatScientific(value, std.fmt.FormatOptions{}, out_stream);
         },
         .Int, .ComptimeInt => {
-            return std.fmt.formatIntValue(value, "", std.fmt.FormatOptions{}, context, Errors, output);
+            return std.fmt.formatIntValue(value, "", std.fmt.FormatOptions{}, out_stream);
         },
         .Bool => {
-            return output(context, if (value) "true" else "false");
+            return out_stream.writeAll(if (value) "true" else "false");
         },
         .Optional => {
             if (value) |payload| {
-                return try stringify(payload, options, context, Errors, output);
+                return try stringify(payload, options, out_stream);
             } else {
-                return output(context, "null");
+                return out_stream.writeAll("null");
             }
         },
         .Enum => {
             if (comptime std.meta.trait.hasFn("jsonStringify")(T)) {
-                return value.jsonStringify(options, context, Errors, output);
+                return value.jsonStringify(options, out_stream);
             }
 
             @compileError("Unable to stringify enum '" ++ @typeName(T) ++ "'");
         },
         .Union => {
             if (comptime std.meta.trait.hasFn("jsonStringify")(T)) {
-                return value.jsonStringify(options, context, Errors, output);
+                return value.jsonStringify(options, out_stream);
             }
 
             const info = @typeInfo(T).Union;
             if (info.tag_type) |UnionTagType| {
                 inline for (info.fields) |u_field| {
                     if (@enumToInt(@as(UnionTagType, value)) == u_field.enum_field.?.value) {
-                        return try stringify(@field(value, u_field.name), options, context, Errors, output);
+                        return try stringify(@field(value, u_field.name), options, out_stream);
                     }
                 }
             } else {
@@ -2298,10 +2297,10 @@ pub fn stringify(
         },
         .Struct => |S| {
             if (comptime std.meta.trait.hasFn("jsonStringify")(T)) {
-                return value.jsonStringify(options, context, Errors, output);
+                return value.jsonStringify(options, out_stream);
             }
 
-            try output(context, "{");
+            try out_stream.writeAll("{");
             comptime var field_output = false;
             inline for (S.fields) |Field, field_i| {
                 // don't include void fields
@@ -2310,39 +2309,39 @@ pub fn stringify(
                 if (!field_output) {
                     field_output = true;
                 } else {
-                    try output(context, ",");
+                    try out_stream.writeAll(",");
                 }
 
-                try stringify(Field.name, options, context, Errors, output);
-                try output(context, ":");
-                try stringify(@field(value, Field.name), options, context, Errors, output);
+                try stringify(Field.name, options, out_stream);
+                try out_stream.writeAll(":");
+                try stringify(@field(value, Field.name), options, out_stream);
             }
-            try output(context, "}");
+            try out_stream.writeAll("}");
             return;
         },
         .Pointer => |ptr_info| switch (ptr_info.size) {
             .One => {
                 // TODO: avoid loops?
-                return try stringify(value.*, options, context, Errors, output);
+                return try stringify(value.*, options, out_stream);
             },
             // TODO: .Many when there is a sentinel (waiting for https://github.com/ziglang/zig/pull/3972)
             .Slice => {
                 if (ptr_info.child == u8 and std.unicode.utf8ValidateSlice(value)) {
-                    try output(context, "\"");
+                    try out_stream.writeAll("\"");
                     var i: usize = 0;
                     while (i < value.len) : (i += 1) {
                         switch (value[i]) {
                             // normal ascii characters
-                            0x20...0x21, 0x23...0x2E, 0x30...0x5B, 0x5D...0x7F => try output(context, value[i .. i + 1]),
+                            0x20...0x21, 0x23...0x2E, 0x30...0x5B, 0x5D...0x7F => try out_stream.writeAll(value[i .. i + 1]),
                             // control characters with short escapes
-                            '\\' => try output(context, "\\\\"),
-                            '\"' => try output(context, "\\\""),
-                            '/' => try output(context, "\\/"),
-                            0x8 => try output(context, "\\b"),
-                            0xC => try output(context, "\\f"),
-                            '\n' => try output(context, "\\n"),
-                            '\r' => try output(context, "\\r"),
-                            '\t' => try output(context, "\\t"),
+                            '\\' => try out_stream.writeAll("\\\\"),
+                            '\"' => try out_stream.writeAll("\\\""),
+                            '/' => try out_stream.writeAll("\\/"),
+                            0x8 => try out_stream.writeAll("\\b"),
+                            0xC => try out_stream.writeAll("\\f"),
+                            '\n' => try out_stream.writeAll("\\n"),
+                            '\r' => try out_stream.writeAll("\\r"),
+                            '\t' => try out_stream.writeAll("\\t"),
                             else => {
                                 const ulen = std.unicode.utf8ByteSequenceLength(value[i]) catch unreachable;
                                 const codepoint = std.unicode.utf8Decode(value[i .. i + ulen]) catch unreachable;
@@ -2350,40 +2349,40 @@ pub fn stringify(
                                     // If the character is in the Basic Multilingual Plane (U+0000 through U+FFFF),
                                     // then it may be represented as a six-character sequence: a reverse solidus, followed
                                     // by the lowercase letter u, followed by four hexadecimal digits that encode the character's code point.
-                                    try output(context, "\\u");
-                                    try std.fmt.formatIntValue(codepoint, "x", std.fmt.FormatOptions{ .width = 4, .fill = '0' }, context, Errors, output);
+                                    try out_stream.writeAll("\\u");
+                                    try std.fmt.formatIntValue(codepoint, "x", std.fmt.FormatOptions{ .width = 4, .fill = '0' }, out_stream);
                                 } else {
                                     // To escape an extended character that is not in the Basic Multilingual Plane,
                                     // the character is represented as a 12-character sequence, encoding the UTF-16 surrogate pair.
                                     const high = @intCast(u16, (codepoint - 0x10000) >> 10) + 0xD800;
                                     const low = @intCast(u16, codepoint & 0x3FF) + 0xDC00;
-                                    try output(context, "\\u");
-                                    try std.fmt.formatIntValue(high, "x", std.fmt.FormatOptions{ .width = 4, .fill = '0' }, context, Errors, output);
-                                    try output(context, "\\u");
-                                    try std.fmt.formatIntValue(low, "x", std.fmt.FormatOptions{ .width = 4, .fill = '0' }, context, Errors, output);
+                                    try out_stream.writeAll("\\u");
+                                    try std.fmt.formatIntValue(high, "x", std.fmt.FormatOptions{ .width = 4, .fill = '0' }, out_stream);
+                                    try out_stream.writeAll("\\u");
+                                    try std.fmt.formatIntValue(low, "x", std.fmt.FormatOptions{ .width = 4, .fill = '0' }, out_stream);
                                 }
                                 i += ulen - 1;
                             },
                         }
                     }
-                    try output(context, "\"");
+                    try out_stream.writeAll("\"");
                     return;
                 }
 
-                try output(context, "[");
+                try out_stream.writeAll("[");
                 for (value) |x, i| {
                     if (i != 0) {
-                        try output(context, ",");
+                        try out_stream.writeAll(",");
                     }
-                    try stringify(x, options, context, Errors, output);
+                    try stringify(x, options, out_stream);
                 }
-                try output(context, "]");
+                try out_stream.writeAll("]");
                 return;
             },
             else => @compileError("Unable to stringify type '" ++ @typeName(T) ++ "'"),
         },
         .Array => |info| {
-            return try stringify(value[0..], options, context, Errors, output);
+            return try stringify(value[0..], options, out_stream);
         },
         else => @compileError("Unable to stringify type '" ++ @typeName(T) ++ "'"),
     }
@@ -2391,10 +2390,26 @@ pub fn stringify(
 }
 
 fn teststringify(expected: []const u8, value: var) !void {
-    const TestStringifyContext = struct {
+    const ValidationOutStream = struct {
+        const Self = @This();
+        pub const OutStream = std.io.OutStream(*Self, Error, write);
+        pub const Error = error{
+            TooMuchData,
+            DifferentData,
+        };
+
         expected_remaining: []const u8,
-        fn testStringifyWrite(context: *@This(), bytes: []const u8) !void {
-            if (context.expected_remaining.len < bytes.len) {
+
+        fn init(exp: []const u8) Self {
+            return .{ .expected_remaining = exp };
+        }
+
+        pub fn outStream(self: *Self) OutStream {
+            return .{ .context = self };
+        }
+
+        fn write(self: *Self, bytes: []const u8) Error!usize {
+            if (self.expected_remaining.len < bytes.len) {
                 std.debug.warn(
                     \\====== expected this output: =========
                     \\{}
@@ -2402,12 +2417,12 @@ fn teststringify(expected: []const u8, value: var) !void {
                     \\{}
                     \\======================================
                 , .{
-                    context.expected_remaining,
+                    self.expected_remaining,
                     bytes,
                 });
                 return error.TooMuchData;
             }
-            if (!mem.eql(u8, context.expected_remaining[0..bytes.len], bytes)) {
+            if (!mem.eql(u8, self.expected_remaining[0..bytes.len], bytes)) {
                 std.debug.warn(
                     \\====== expected this output: =========
                     \\{}
@@ -2415,21 +2430,19 @@ fn teststringify(expected: []const u8, value: var) !void {
                     \\{}
                     \\======================================
                 , .{
-                    context.expected_remaining[0..bytes.len],
+                    self.expected_remaining[0..bytes.len],
                     bytes,
                 });
                 return error.DifferentData;
             }
-            context.expected_remaining = context.expected_remaining[bytes.len..];
+            self.expected_remaining = self.expected_remaining[bytes.len..];
+            return bytes.len;
         }
     };
-    var buf: [100]u8 = undefined;
-    var context = TestStringifyContext{ .expected_remaining = expected };
-    try stringify(value, StringifyOptions{}, &context, error{
-        TooMuchData,
-        DifferentData,
-    }, TestStringifyContext.testStringifyWrite);
-    if (context.expected_remaining.len > 0) return error.NotEnoughData;
+
+    var vos = ValidationOutStream.init(expected);
+    try stringify(value, StringifyOptions{}, vos.outStream());
+    if (vos.expected_remaining.len > 0) return error.NotEnoughData;
 }
 
 test "stringify basic types" {
@@ -2497,13 +2510,11 @@ test "stringify struct with custom stringifier" {
         pub fn jsonStringify(
             value: Self,
             options: StringifyOptions,
-            context: var,
-            comptime Errors: type,
-            comptime output: fn (@TypeOf(context), []const u8) Errors!void,
+            out_stream: var,
         ) !void {
-            try output(context, "[\"something special\",");
-            try stringify(42, options, context, Errors, output);
-            try output(context, "]");
+            try out_stream.writeAll("[\"something special\",");
+            try stringify(42, options, out_stream);
+            try out_stream.writeAll("]");
         }
     }{ .foo = 42 });
 }
diff --git a/lib/std/json/write_stream.zig b/lib/std/json/write_stream.zig
index 213b6768d4..f4d171011c 100644
--- a/lib/std/json/write_stream.zig
+++ b/lib/std/json/write_stream.zig
@@ -30,11 +30,11 @@ pub fn WriteStream(comptime OutStream: type, comptime max_depth: usize) type {
         /// The string used as spacing.
         space: []const u8 = " ",
 
-        stream: *OutStream,
+        stream: OutStream,
         state_index: usize,
         state: [max_depth]State,
 
-        pub fn init(stream: *OutStream) Self {
+        pub fn init(stream: OutStream) Self {
             var self = Self{
                 .stream = stream,
                 .state_index = 1,
@@ -90,8 +90,8 @@ pub fn WriteStream(comptime OutStream: type, comptime max_depth: usize) type {
                     self.pushState(.Value);
                     try self.indent();
                     try self.writeEscapedString(name);
-                    try self.stream.write(":");
-                    try self.stream.write(self.space);
+                    try self.stream.writeAll(":");
+                    try self.stream.writeAll(self.space);
                 },
             }
         }
@@ -134,16 +134,16 @@ pub fn WriteStream(comptime OutStream: type, comptime max_depth: usize) type {
 
         pub fn emitNull(self: *Self) !void {
             assert(self.state[self.state_index] == State.Value);
-            try self.stream.write("null");
+            try self.stream.writeAll("null");
             self.popState();
         }
 
         pub fn emitBool(self: *Self, value: bool) !void {
             assert(self.state[self.state_index] == State.Value);
             if (value) {
-                try self.stream.write("true");
+                try self.stream.writeAll("true");
             } else {
-                try self.stream.write("false");
+                try self.stream.writeAll("false");
             }
             self.popState();
         }
@@ -188,13 +188,13 @@ pub fn WriteStream(comptime OutStream: type, comptime max_depth: usize) type {
             try self.stream.writeByte('"');
             for (string) |s| {
                 switch (s) {
-                    '"' => try self.stream.write("\\\""),
-                    '\t' => try self.stream.write("\\t"),
-                    '\r' => try self.stream.write("\\r"),
-                    '\n' => try self.stream.write("\\n"),
-                    8 => try self.stream.write("\\b"),
-                    12 => try self.stream.write("\\f"),
-                    '\\' => try self.stream.write("\\\\"),
+                    '"' => try self.stream.writeAll("\\\""),
+                    '\t' => try self.stream.writeAll("\\t"),
+                    '\r' => try self.stream.writeAll("\\r"),
+                    '\n' => try self.stream.writeAll("\\n"),
+                    8 => try self.stream.writeAll("\\b"),
+                    12 => try self.stream.writeAll("\\f"),
+                    '\\' => try self.stream.writeAll("\\\\"),
                     else => try self.stream.writeByte(s),
                 }
             }
@@ -231,10 +231,10 @@ pub fn WriteStream(comptime OutStream: type, comptime max_depth: usize) type {
 
         fn indent(self: *Self) !void {
             assert(self.state_index >= 1);
-            try self.stream.write(self.newline);
+            try self.stream.writeAll(self.newline);
             var i: usize = 0;
             while (i < self.state_index - 1) : (i += 1) {
-                try self.stream.write(self.one_indent);
+                try self.stream.writeAll(self.one_indent);
             }
         }
 
@@ -249,15 +249,22 @@ pub fn WriteStream(comptime OutStream: type, comptime max_depth: usize) type {
     };
 }
 
+pub fn writeStream(
+    out_stream: var,
+    comptime max_depth: usize,
+) WriteStream(@TypeOf(out_stream), max_depth) {
+    return WriteStream(@TypeOf(out_stream), max_depth).init(out_stream);
+}
+
 test "json write stream" {
     var out_buf: [1024]u8 = undefined;
-    var slice_stream = std.io.SliceOutStream.init(&out_buf);
-    const out = &slice_stream.stream;
+    var slice_stream = std.io.fixedBufferStream(&out_buf);
+    const out = slice_stream.outStream();
 
     var arena_allocator = std.heap.ArenaAllocator.init(std.testing.allocator);
     defer arena_allocator.deinit();
 
-    var w = std.json.WriteStream(@TypeOf(out).Child, 10).init(out);
+    var w = std.json.writeStream(out, 10);
     try w.emitJson(try getJson(&arena_allocator.allocator));
 
     const result = slice_stream.getWritten();
diff --git a/lib/std/math/big/int.zig b/lib/std/math/big/int.zig
index 8fda3f647a..95d0764f68 100644
--- a/lib/std/math/big/int.zig
+++ b/lib/std/math/big/int.zig
@@ -519,16 +519,14 @@ pub const Int = struct {
         self: Int,
         comptime fmt: []const u8,
         options: std.fmt.FormatOptions,
-        context: var,
-        comptime FmtError: type,
-        output: fn (@TypeOf(context), []const u8) FmtError!void,
+        out_stream: var,
     ) FmtError!void {
         self.assertWritable();
         // TODO look at fmt and support other bases
         // TODO support read-only fixed integers
         const str = self.toString(self.allocator.?, 10) catch @panic("TODO make this non allocating");
         defer self.allocator.?.free(str);
-        return output(context, str);
+        return out_stream.print(str);
     }
 
     /// Returns -1, 0, 1 if |a| < |b|, |a| == |b| or |a| > |b| respectively.
diff --git a/lib/std/mem.zig b/lib/std/mem.zig
index 4da7829570..c767765652 100644
--- a/lib/std/mem.zig
+++ b/lib/std/mem.zig
@@ -105,6 +105,20 @@ pub const Allocator = struct {
         return self.alignedAlloc(T, null, n);
     }
 
+    /// Allocates an array of `n + 1` items of type `T` and sets the first `n`
+    /// items to `undefined` and the last item to `sentinel`. Depending on the
+    /// Allocator implementation, it may be required to call `free` once the
+    /// memory is no longer needed, to avoid a resource leak. If the
+    /// `Allocator` implementation is unknown, then correct code will
+    /// call `free` when done.
+    ///
+    /// For allocating a single item, see `create`.
+    pub fn allocSentinel(self: *Allocator, comptime Elem: type, n: usize, comptime sentinel: Elem) Error![:sentinel]Elem {
+        var ptr = try self.alloc(Elem, n + 1);
+        ptr[n] = sentinel;
+        return ptr[0 .. n :sentinel];
+    }
+
     pub fn alignedAlloc(
         self: *Allocator,
         comptime T: type,
@@ -921,6 +935,9 @@ pub fn writeInt(comptime T: type, buffer: *[@divExact(T.bit_count, 8)]u8, value:
 pub fn writeIntSliceLittle(comptime T: type, buffer: []u8, value: T) void {
     assert(buffer.len >= @divExact(T.bit_count, 8));
 
+    if (T.bit_count == 0)
+        return set(u8, buffer, 0);
+
     // TODO I want to call writeIntLittle here but comptime eval facilities aren't good enough
     const uint = std.meta.IntType(false, T.bit_count);
     var bits = @truncate(uint, value);
@@ -938,6 +955,9 @@ pub fn writeIntSliceLittle(comptime T: type, buffer: []u8, value: T) void {
 pub fn writeIntSliceBig(comptime T: type, buffer: []u8, value: T) void {
     assert(buffer.len >= @divExact(T.bit_count, 8));
 
+    if (T.bit_count == 0)
+        return set(u8, buffer, 0);
+
     // TODO I want to call writeIntBig here but comptime eval facilities aren't good enough
     const uint = std.meta.IntType(false, T.bit_count);
     var bits = @truncate(uint, value);
@@ -1807,7 +1827,7 @@ test "sliceAsBytes" {
 }
 
 test "sliceAsBytes with sentinel slice" {
-    const empty_string:[:0]const u8 = "";
+    const empty_string: [:0]const u8 = "";
     const bytes = sliceAsBytes(empty_string);
     testing.expect(bytes.len == 0);
 }
diff --git a/lib/std/net.zig b/lib/std/net.zig
index 6d0daefdc0..c2328b9bd0 100644
--- a/lib/std/net.zig
+++ b/lib/std/net.zig
@@ -269,15 +269,13 @@ pub const Address = extern union {
         self: Address,
         comptime fmt: []const u8,
         options: std.fmt.FormatOptions,
-        context: var,
-        comptime Errors: type,
-        comptime output: fn (@TypeOf(context), []const u8) Errors!void,
+        out_stream: var,
     ) !void {
         switch (self.any.family) {
             os.AF_INET => {
                 const port = mem.bigToNative(u16, self.in.port);
                 const bytes = @ptrCast(*const [4]u8, &self.in.addr);
-                try std.fmt.format(context, Errors, output, "{}.{}.{}.{}:{}", .{
+                try std.fmt.format(out_stream, "{}.{}.{}.{}:{}", .{
                     bytes[0],
                     bytes[1],
                     bytes[2],
@@ -288,7 +286,7 @@ pub const Address = extern union {
             os.AF_INET6 => {
                 const port = mem.bigToNative(u16, self.in6.port);
                 if (mem.eql(u8, self.in6.addr[0..12], &[_]u8{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff })) {
-                    try std.fmt.format(context, Errors, output, "[::ffff:{}.{}.{}.{}]:{}", .{
+                    try std.fmt.format(out_stream, "[::ffff:{}.{}.{}.{}]:{}", .{
                         self.in6.addr[12],
                         self.in6.addr[13],
                         self.in6.addr[14],
@@ -308,30 +306,30 @@ pub const Address = extern union {
                         break :blk buf;
                     },
                 };
-                try output(context, "[");
+                try out_stream.writeAll("[");
                 var i: usize = 0;
                 var abbrv = false;
                 while (i < native_endian_parts.len) : (i += 1) {
                     if (native_endian_parts[i] == 0) {
                         if (!abbrv) {
-                            try output(context, if (i == 0) "::" else ":");
+                            try out_stream.writeAll(if (i == 0) "::" else ":");
                             abbrv = true;
                         }
                         continue;
                     }
-                    try std.fmt.format(context, Errors, output, "{x}", .{native_endian_parts[i]});
+                    try std.fmt.format(out_stream, "{x}", .{native_endian_parts[i]});
                     if (i != native_endian_parts.len - 1) {
-                        try output(context, ":");
+                        try out_stream.writeAll(":");
                     }
                 }
-                try std.fmt.format(context, Errors, output, "]:{}", .{port});
+                try std.fmt.format(out_stream, "]:{}", .{port});
             },
             os.AF_UNIX => {
                 if (!has_unix_sockets) {
                     unreachable;
                 }
 
-                try std.fmt.format(context, Errors, output, "{}", .{&self.un.path});
+                try std.fmt.format(out_stream, "{}", .{&self.un.path});
             },
             else => unreachable,
         }
@@ -816,7 +814,7 @@ fn linuxLookupNameFromHosts(
     };
     defer file.close();
 
-    const stream = &std.io.BufferedInStream(fs.File.ReadError).init(&file.inStream().stream).stream;
+    const stream = std.io.bufferedInStream(file.inStream()).inStream();
     var line_buf: [512]u8 = undefined;
     while (stream.readUntilDelimiterOrEof(&line_buf, '\n') catch |err| switch (err) {
         error.StreamTooLong => blk: {
@@ -1010,7 +1008,7 @@ fn getResolvConf(allocator: *mem.Allocator, rc: *ResolvConf) !void {
     };
     defer file.close();
 
-    const stream = &std.io.BufferedInStream(fs.File.ReadError).init(&file.inStream().stream).stream;
+    const stream = std.io.bufferedInStream(file.inStream()).inStream();
     var line_buf: [512]u8 = undefined;
     while (stream.readUntilDelimiterOrEof(&line_buf, '\n') catch |err| switch (err) {
         error.StreamTooLong => blk: {
diff --git a/lib/std/net/test.zig b/lib/std/net/test.zig
index 4f3d955f30..087f965c4e 100644
--- a/lib/std/net/test.zig
+++ b/lib/std/net/test.zig
@@ -113,6 +113,6 @@ fn testClient(addr: net.Address) anyerror!void {
 fn testServer(server: *net.StreamServer) anyerror!void {
     var client = try server.accept();
 
-    const stream = &client.file.outStream().stream;
+    const stream = client.file.outStream();
     try stream.print("hello from server\n", .{});
 }
diff --git a/lib/std/os.zig b/lib/std/os.zig
index a6c8b32ba9..ed99c48021 100644
--- a/lib/std/os.zig
+++ b/lib/std/os.zig
@@ -176,7 +176,7 @@ fn getRandomBytesDevURandom(buf: []u8) !void {
         .io_mode = .blocking,
         .async_block_allowed = std.fs.File.async_block_allowed_yes,
     };
-    const stream = &file.inStream().stream;
+    const stream = file.inStream();
     stream.readNoEof(buf) catch return error.Unexpected;
 }
 
@@ -273,10 +273,10 @@ pub fn exit(status: u8) noreturn {
         // exit() is only avaliable if exitBootServices() has not been called yet.
         // This call to exit should not fail, so we don't care about its return value.
         if (uefi.system_table.boot_services) |bs| {
-            _ = bs.exit(uefi.handle, status, 0, null);
+            _ = bs.exit(uefi.handle, @intToEnum(uefi.Status, status), 0, null);
         }
         // If we can't exit, reboot the system instead.
-        uefi.system_table.runtime_services.resetSystem(uefi.tables.ResetType.ResetCold, status, 0, null);
+        uefi.system_table.runtime_services.resetSystem(uefi.tables.ResetType.ResetCold, @intToEnum(uefi.Status, status), 0, null);
     }
     system.exit(status);
 }
@@ -438,6 +438,61 @@ pub fn pread(fd: fd_t, buf: []u8, offset: u64) PReadError!usize {
     return index;
 }
 
+pub const TruncateError = error{
+    FileTooBig,
+    InputOutput,
+    CannotTruncate,
+    FileBusy,
+} || UnexpectedError;
+
+pub fn ftruncate(fd: fd_t, length: u64) TruncateError!void {
+    if (std.Target.current.os.tag == .windows) {
+        var io_status_block: windows.IO_STATUS_BLOCK = undefined;
+        var eof_info = windows.FILE_END_OF_FILE_INFORMATION{
+            .EndOfFile = @bitCast(windows.LARGE_INTEGER, length),
+        };
+
+        const rc = windows.ntdll.NtSetInformationFile(
+            fd,
+            &io_status_block,
+            &eof_info,
+            @sizeOf(windows.FILE_END_OF_FILE_INFORMATION),
+            .FileEndOfFileInformation,
+        );
+
+        switch (rc) {
+            .SUCCESS => {},
+            .INVALID_HANDLE => unreachable, // Handle not open for writing
+            .ACCESS_DENIED => return error.CannotTruncate,
+            else => return windows.unexpectedStatus(rc),
+        }
+
+        return;
+    }
+
+    while (true) {
+        const rc = if (builtin.link_libc)
+            if (std.Target.current.os.tag == .linux)
+                system.ftruncate64(fd, @bitCast(off_t, length))
+            else
+                system.ftruncate(fd, @bitCast(off_t, length))
+        else
+            system.ftruncate(fd, length);
+
+        switch (errno(rc)) {
+            0 => return,
+            EINTR => continue,
+            EFBIG => return error.FileTooBig,
+            EIO => return error.InputOutput,
+            EPERM => return error.CannotTruncate,
+            ETXTBSY => return error.FileBusy,
+            EBADF => unreachable, // Handle not open for writing
+            EINVAL => unreachable, // Handle not open for writing
+            else => |err| return unexpectedErrno(err),
+        }
+    }
+}
+
 /// Number of bytes read is returned. Upon reading end-of-file, zero is returned.
 ///
 /// Retries when interrupted by a signal.
@@ -3077,7 +3132,7 @@ pub fn realpathW(pathname: [*:0]const u16, out_buffer: *[MAX_PATH_BYTES]u8) Real
         windows.FILE_SHARE_READ,
         null,
         windows.OPEN_EXISTING,
-        windows.FILE_ATTRIBUTE_NORMAL,
+        windows.FILE_FLAG_BACKUP_SEMANTICS,
         null,
     );
     defer windows.CloseHandle(h_file);
diff --git a/lib/std/os/bits/darwin.zig b/lib/std/os/bits/darwin.zig
index fb933c6698..6808af0315 100644
--- a/lib/std/os/bits/darwin.zig
+++ b/lib/std/os/bits/darwin.zig
@@ -53,6 +53,7 @@ pub const mach_timebase_info_data = extern struct {
 };
 
 pub const off_t = i64;
+pub const ino_t = u64;
 
 /// Renamed to Stat to not conflict with the stat function.
 /// atime, mtime, and ctime have functions to return `timespec`,
@@ -64,7 +65,7 @@ pub const Stat = extern struct {
     dev: i32,
     mode: u16,
     nlink: u16,
-    ino: u64,
+    ino: ino_t,
     uid: u32,
     gid: u32,
     rdev: i32,
diff --git a/lib/std/os/bits/dragonfly.zig b/lib/std/os/bits/dragonfly.zig
index c6c23affa7..27b2733b76 100644
--- a/lib/std/os/bits/dragonfly.zig
+++ b/lib/std/os/bits/dragonfly.zig
@@ -138,8 +138,10 @@ pub const MAP_SIZEALIGN = 262144;
 
 pub const PATH_MAX = 1024;
 
+pub const ino_t = c_ulong;
+
 pub const Stat = extern struct {
-    ino: c_ulong,
+    ino: ino_t,
     nlink: c_uint,
     dev: c_uint,
     mode: c_ushort,
diff --git a/lib/std/os/bits/freebsd.zig b/lib/std/os/bits/freebsd.zig
index b7d14934f5..02fe7e75b3 100644
--- a/lib/std/os/bits/freebsd.zig
+++ b/lib/std/os/bits/freebsd.zig
@@ -98,6 +98,7 @@ pub const msghdr_const = extern struct {
 };
 
 pub const off_t = i64;
+pub const ino_t = u64;
 
 /// Renamed to Stat to not conflict with the stat function.
 /// atime, mtime, and ctime have functions to return `timespec`,
@@ -107,7 +108,7 @@ pub const off_t = i64;
 /// methods to accomplish this.
 pub const Stat = extern struct {
     dev: u64,
-    ino: u64,
+    ino: ino_t,
     nlink: usize,
 
     mode: u16,
diff --git a/lib/std/os/bits/linux.zig b/lib/std/os/bits/linux.zig
index c5a9a7d774..2a58c14490 100644
--- a/lib/std/os/bits/linux.zig
+++ b/lib/std/os/bits/linux.zig
@@ -18,6 +18,8 @@ pub usingnamespace switch (builtin.arch) {
     else => struct {},
 };
 
+pub usingnamespace @import("linux/netlink.zig");
+
 const is_mips = builtin.arch.isMIPS();
 
 pub const pid_t = i32;
@@ -30,6 +32,10 @@ pub const NAME_MAX = 255;
 pub const PATH_MAX = 4096;
 pub const IOV_MAX = 1024;
 
+/// Largest hardware address length
+/// e.g. a mac address is a type of hardware address
+pub const MAX_ADDR_LEN = 32;
+
 pub const STDIN_FILENO = 0;
 pub const STDOUT_FILENO = 1;
 pub const STDERR_FILENO = 2;
@@ -1290,12 +1296,12 @@ pub const io_uring_files_update = struct {
 };
 
 pub const utsname = extern struct {
-    sysname: [65]u8,
-    nodename: [65]u8,
-    release: [65]u8,
-    version: [65]u8,
-    machine: [65]u8,
-    domainname: [65]u8,
+    sysname: [64:0]u8,
+    nodename: [64:0]u8,
+    release: [64:0]u8,
+    version: [64:0]u8,
+    machine: [64:0]u8,
+    domainname: [64:0]u8,
 };
 pub const HOST_NAME_MAX = 64;
 
diff --git a/lib/std/os/bits/linux/netlink.zig b/lib/std/os/bits/linux/netlink.zig
new file mode 100644
index 0000000000..b40308d6fc
--- /dev/null
+++ b/lib/std/os/bits/linux/netlink.zig
@@ -0,0 +1,498 @@
+usingnamespace @import("../linux.zig");
+
+/// Routing/device hook
+pub const NETLINK_ROUTE = 0;
+
+/// Unused number
+pub const NETLINK_UNUSED = 1;
+
+/// Reserved for user mode socket protocols
+pub const NETLINK_USERSOCK = 2;
+
+/// Unused number, formerly ip_queue
+pub const NETLINK_FIREWALL = 3;
+
+/// socket monitoring
+pub const NETLINK_SOCK_DIAG = 4;
+
+/// netfilter/iptables ULOG
+pub const NETLINK_NFLOG = 5;
+
+/// ipsec
+pub const NETLINK_XFRM = 6;
+
+/// SELinux event notifications
+pub const NETLINK_SELINUX = 7;
+
+/// Open-iSCSI
+pub const NETLINK_ISCSI = 8;
+
+/// auditing
+pub const NETLINK_AUDIT = 9;
+
+pub const NETLINK_FIB_LOOKUP = 10;
+
+pub const NETLINK_CONNECTOR = 11;
+
+/// netfilter subsystem
+pub const NETLINK_NETFILTER = 12;
+
+pub const NETLINK_IP6_FW = 13;
+
+/// DECnet routing messages
+pub const NETLINK_DNRTMSG = 14;
+
+/// Kernel messages to userspace
+pub const NETLINK_KOBJECT_UEVENT = 15;
+
+pub const NETLINK_GENERIC = 16;
+
+// leave room for NETLINK_DM (DM Events)
+
+/// SCSI Transports
+pub const NETLINK_SCSITRANSPORT = 18;
+
+pub const NETLINK_ECRYPTFS = 19;
+
+pub const NETLINK_RDMA = 20;
+
+/// Crypto layer
+pub const NETLINK_CRYPTO = 21;
+
+/// SMC monitoring
+pub const NETLINK_SMC = 22;
+
+// Flags values
+
+/// It is request message.
+pub const NLM_F_REQUEST = 0x01;
+
+/// Multipart message, terminated by NLMSG_DONE
+pub const NLM_F_MULTI = 0x02;
+
+/// Reply with ack, with zero or error code
+pub const NLM_F_ACK = 0x04;
+
+/// Echo this request
+pub const NLM_F_ECHO = 0x08;
+
+/// Dump was inconsistent due to sequence change
+pub const NLM_F_DUMP_INTR = 0x10;
+
+/// Dump was filtered as requested
+pub const NLM_F_DUMP_FILTERED = 0x20;
+
+// Modifiers to GET request
+
+/// specify tree root
+pub const NLM_F_ROOT = 0x100;
+
+/// return all matching
+pub const NLM_F_MATCH = 0x200;
+
+/// atomic GET
+pub const NLM_F_ATOMIC = 0x400;
+pub const NLM_F_DUMP = NLM_F_ROOT | NLM_F_MATCH;
+
+// Modifiers to NEW request
+
+/// Override existing
+pub const NLM_F_REPLACE = 0x100;
+
+/// Do not touch, if it exists
+pub const NLM_F_EXCL = 0x200;
+
+/// Create, if it does not exist
+pub const NLM_F_CREATE = 0x400;
+
+/// Add to end of list
+pub const NLM_F_APPEND = 0x800;
+
+// Modifiers to DELETE request
+
+/// Do not delete recursively
+pub const NLM_F_NONREC = 0x100;
+
+// Flags for ACK message
+
+/// request was capped
+pub const NLM_F_CAPPED = 0x100;
+
+/// extended ACK TVLs were included
+pub const NLM_F_ACK_TLVS = 0x200;
+
+pub const NetlinkMessageType = extern enum(u16) {
+    /// Nothing.
+    NOOP = 0x1,
+
+    /// Error
+    ERROR = 0x2,
+
+    /// End of a dump
+    DONE = 0x3,
+
+    /// Data lost
+    OVERRUN = 0x4,
+
+    /// < 0x10: reserved control messages
+    pub const MIN_TYPE = 0x10;
+
+    // rtlink types
+
+    RTM_NEWLINK = 16,
+    RTM_DELLINK,
+    RTM_GETLINK,
+    RTM_SETLINK,
+
+    RTM_NEWADDR = 20,
+    RTM_DELADDR,
+    RTM_GETADDR,
+
+    RTM_NEWROUTE = 24,
+    RTM_DELROUTE,
+    RTM_GETROUTE,
+
+    RTM_NEWNEIGH = 28,
+    RTM_DELNEIGH,
+    RTM_GETNEIGH,
+
+    RTM_NEWRULE = 32,
+    RTM_DELRULE,
+    RTM_GETRULE,
+
+    RTM_NEWQDISC = 36,
+    RTM_DELQDISC,
+    RTM_GETQDISC,
+
+    RTM_NEWTCLASS = 40,
+    RTM_DELTCLASS,
+    RTM_GETTCLASS,
+
+    RTM_NEWTFILTER = 44,
+    RTM_DELTFILTER,
+    RTM_GETTFILTER,
+
+    RTM_NEWACTION = 48,
+    RTM_DELACTION,
+    RTM_GETACTION,
+
+    RTM_NEWPREFIX = 52,
+
+    RTM_GETMULTICAST = 58,
+
+    RTM_GETANYCAST = 62,
+
+    RTM_NEWNEIGHTBL = 64,
+    RTM_GETNEIGHTBL = 66,
+    RTM_SETNEIGHTBL,
+
+    RTM_NEWNDUSEROPT = 68,
+
+    RTM_NEWADDRLABEL = 72,
+    RTM_DELADDRLABEL,
+    RTM_GETADDRLABEL,
+
+    RTM_GETDCB = 78,
+    RTM_SETDCB,
+
+    RTM_NEWNETCONF = 80,
+    RTM_DELNETCONF,
+    RTM_GETNETCONF = 82,
+
+    RTM_NEWMDB = 84,
+    RTM_DELMDB = 85,
+    RTM_GETMDB = 86,
+
+    RTM_NEWNSID = 88,
+    RTM_DELNSID = 89,
+    RTM_GETNSID = 90,
+
+    RTM_NEWSTATS = 92,
+    RTM_GETSTATS = 94,
+
+    RTM_NEWCACHEREPORT = 96,
+
+    RTM_NEWCHAIN = 100,
+    RTM_DELCHAIN,
+    RTM_GETCHAIN,
+
+    RTM_NEWNEXTHOP = 104,
+    RTM_DELNEXTHOP,
+    RTM_GETNEXTHOP,
+
+    _,
+};
+
+/// Netlink socket address
+pub const sockaddr_nl = extern struct {
+    family: sa_family_t = AF_NETLINK,
+    __pad1: c_ushort = 0,
+
+    /// port ID
+    pid: u32,
+
+    /// multicast groups mask
+    groups: u32,
+};
+
+/// Netlink message header
+/// Specified in RFC 3549 Section 2.3.2
+pub const nlmsghdr = extern struct {
+    /// Length of message including header
+    len: u32,
+
+    /// Message content
+    @"type": NetlinkMessageType,
+
+    /// Additional flags
+    flags: u16,
+
+    /// Sequence number
+    seq: u32,
+
+    /// Sending process port ID
+    pid: u32,
+};
+
+pub const ifinfomsg = extern struct {
+    family: u8,
+    __pad1: u8 = 0,
+
+    /// ARPHRD_*
+    @"type": c_ushort,
+
+    /// Link index
+    index: c_int,
+
+    /// IFF_* flags
+    flags: c_uint,
+
+    /// IFF_* change mask
+    /// is reserved for future use and should be always set to 0xFFFFFFFF.
+    change: c_uint = 0xFFFFFFFF,
+};
+
+pub const rtattr = extern struct {
+    /// Length of option
+    len: c_ushort,
+
+    /// Type of option
+    @"type": IFLA,
+
+    pub const ALIGNTO = 4;
+};
+
+pub const IFLA = extern enum(c_ushort) {
+    UNSPEC,
+    ADDRESS,
+    BROADCAST,
+    IFNAME,
+    MTU,
+    LINK,
+    QDISC,
+    STATS,
+    COST,
+    PRIORITY,
+    MASTER,
+
+    /// Wireless Extension event
+    WIRELESS,
+
+    /// Protocol specific information for a link
+    PROTINFO,
+
+    TXQLEN,
+    MAP,
+    WEIGHT,
+    OPERSTATE,
+    LINKMODE,
+    LINKINFO,
+    NET_NS_PID,
+    IFALIAS,
+
+    /// Number of VFs if device is SR-IOV PF
+    NUM_VF,
+
+    VFINFO_LIST,
+    STATS64,
+    VF_PORTS,
+    PORT_SELF,
+    AF_SPEC,
+
+    /// Group the device belongs to
+    GROUP,
+
+    NET_NS_FD,
+
+    /// Extended info mask, VFs, etc
+    EXT_MASK,
+
+    /// Promiscuity count: > 0 means acts PROMISC
+    PROMISCUITY,
+
+    NUM_TX_QUEUES,
+    NUM_RX_QUEUES,
+    CARRIER,
+    PHYS_PORT_ID,
+    CARRIER_CHANGES,
+    PHYS_SWITCH_ID,
+    LINK_NETNSID,
+    PHYS_PORT_NAME,
+    PROTO_DOWN,
+    GSO_MAX_SEGS,
+    GSO_MAX_SIZE,
+    PAD,
+    XDP,
+    EVENT,
+
+    NEW_NETNSID,
+    IF_NETNSID = 46,
+    TARGET_NETNSID = 46, // new alias
+
+    CARRIER_UP_COUNT,
+    CARRIER_DOWN_COUNT,
+    NEW_IFINDEX,
+    MIN_MTU,
+    MAX_MTU,
+
+    _,
+};
+
+pub const rtnl_link_ifmap = extern struct {
+    mem_start: u64,
+    mem_end: u64,
+    base_addr: u64,
+    irq: u16,
+    dma: u8,
+    port: u8,
+};
+
+pub const rtnl_link_stats = extern struct {
+    /// total packets received
+    rx_packets: u32,
+
+    /// total packets transmitted
+    tx_packets: u32,
+
+    /// total bytes received
+    rx_bytes: u32,
+
+    /// total bytes transmitted
+    tx_bytes: u32,
+
+    /// bad packets received
+    rx_errors: u32,
+
+    /// packet transmit problems
+    tx_errors: u32,
+
+    /// no space in linux buffers
+    rx_dropped: u32,
+
+    /// no space available in linux
+    tx_dropped: u32,
+
+    /// multicast packets received
+    multicast: u32,
+
+    collisions: u32,
+
+    // detailed rx_errors
+
+    rx_length_errors: u32,
+
+    /// receiver ring buff overflow
+    rx_over_errors: u32,
+
+    /// recved pkt with crc error
+    rx_crc_errors: u32,
+
+    /// recv'd frame alignment error
+    rx_frame_errors: u32,
+
+    /// recv'r fifo overrun
+    rx_fifo_errors: u32,
+
+    /// receiver missed packet
+    rx_missed_errors: u32,
+
+    // detailed tx_errors
+    tx_aborted_errors: u32,
+    tx_carrier_errors: u32,
+    tx_fifo_errors: u32,
+    tx_heartbeat_errors: u32,
+    tx_window_errors: u32,
+
+    // for cslip etc
+
+    rx_compressed: u32,
+    tx_compressed: u32,
+
+    /// dropped, no handler found
+    rx_nohandler: u32,
+};
+
+pub const rtnl_link_stats64 = extern struct {
+    /// total packets received
+    rx_packets: u64,
+
+    /// total packets transmitted
+    tx_packets: u64,
+
+    /// total bytes received
+    rx_bytes: u64,
+
+    /// total bytes transmitted
+    tx_bytes: u64,
+
+    /// bad packets received
+    rx_errors: u64,
+
+    /// packet transmit problems
+    tx_errors: u64,
+
+    /// no space in linux buffers
+    rx_dropped: u64,
+
+    /// no space available in linux
+    tx_dropped: u64,
+
+    /// multicast packets received
+    multicast: u64,
+
+    collisions: u64,
+
+    // detailed rx_errors
+
+    rx_length_errors: u64,
+
+    /// receiver ring buff overflow
+    rx_over_errors: u64,
+
+    /// recved pkt with crc error
+    rx_crc_errors: u64,
+
+    /// recv'd frame alignment error
+    rx_frame_errors: u64,
+
+    /// recv'r fifo overrun
+    rx_fifo_errors: u64,
+
+    /// receiver missed packet
+    rx_missed_errors: u64,
+
+    // detailed tx_errors
+    tx_aborted_errors: u64,
+    tx_carrier_errors: u64,
+    tx_fifo_errors: u64,
+    tx_heartbeat_errors: u64,
+    tx_window_errors: u64,
+
+    // for cslip etc
+
+    rx_compressed: u64,
+    tx_compressed: u64,
+
+    /// dropped, no handler found
+    rx_nohandler: u64,
+};
diff --git a/lib/std/os/bits/linux/x86_64.zig b/lib/std/os/bits/linux/x86_64.zig
index 608f74e2d3..e92591d94e 100644
--- a/lib/std/os/bits/linux/x86_64.zig
+++ b/lib/std/os/bits/linux/x86_64.zig
@@ -481,6 +481,7 @@ pub const msghdr_const = extern struct {
 };
 
 pub const off_t = i64;
+pub const ino_t = u64;
 
 /// Renamed to Stat to not conflict with the stat function.
 /// atime, mtime, and ctime have functions to return `timespec`,
@@ -490,7 +491,7 @@ pub const off_t = i64;
 /// methods to accomplish this.
 pub const Stat = extern struct {
     dev: u64,
-    ino: u64,
+    ino: ino_t,
     nlink: usize,
 
     mode: u32,
diff --git a/lib/std/os/bits/netbsd.zig b/lib/std/os/bits/netbsd.zig
index 89e0998d6d..735485695a 100644
--- a/lib/std/os/bits/netbsd.zig
+++ b/lib/std/os/bits/netbsd.zig
@@ -69,6 +69,7 @@ pub const msghdr_const = extern struct {
 };
 
 pub const off_t = i64;
+pub const ino_t = u64;
 
 /// Renamed to Stat to not conflict with the stat function.
 /// atime, mtime, and ctime have functions to return `timespec`,
@@ -79,7 +80,7 @@ pub const off_t = i64;
 pub const Stat = extern struct {
     dev: u64,
     mode: u32,
-    ino: u64,
+    ino: ino_t,
     nlink: usize,
 
     uid: u32,
diff --git a/lib/std/os/bits/wasi.zig b/lib/std/os/bits/wasi.zig
index f56e53504e..8fb85e1fcd 100644
--- a/lib/std/os/bits/wasi.zig
+++ b/lib/std/os/bits/wasi.zig
@@ -178,6 +178,7 @@ pub const FILESTAT_SET_MTIM: fstflags_t = 0x0004;
 pub const FILESTAT_SET_MTIM_NOW: fstflags_t = 0x0008;
 
 pub const inode_t = u64;
+pub const ino_t = inode_t;
 
 pub const linkcount_t = u32;
 
diff --git a/lib/std/os/bits/windows.zig b/lib/std/os/bits/windows.zig
index ba2725e0a9..05486c8f7b 100644
--- a/lib/std/os/bits/windows.zig
+++ b/lib/std/os/bits/windows.zig
@@ -4,6 +4,7 @@ usingnamespace @import("../windows/bits.zig");
 const ws2_32 = @import("../windows/ws2_32.zig");
 
 pub const fd_t = HANDLE;
+pub const ino_t = LARGE_INTEGER;
 pub const pid_t = HANDLE;
 pub const mode_t = u0;
 
diff --git a/lib/std/os/linux.zig b/lib/std/os/linux.zig
index 719e541846..ba7356d62c 100644
--- a/lib/std/os/linux.zig
+++ b/lib/std/os/linux.zig
@@ -350,7 +350,13 @@ pub fn pread(fd: i32, buf: [*]u8, count: usize, offset: u64) usize {
             );
         }
     } else {
-        return syscall4(SYS_pread, @bitCast(usize, @as(isize, fd)), @ptrToInt(buf), count, offset);
+        return syscall4(
+            SYS_pread,
+            @bitCast(usize, @as(isize, fd)),
+            @ptrToInt(buf),
+            count,
+            offset,
+        );
     }
 }
 
@@ -384,8 +390,64 @@ pub fn write(fd: i32, buf: [*]const u8, count: usize) usize {
     return syscall3(SYS_write, @bitCast(usize, @as(isize, fd)), @ptrToInt(buf), count);
 }
 
+pub fn ftruncate(fd: i32, length: u64) usize {
+    if (@hasDecl(@This(), "SYS_ftruncate64")) {
+        if (require_aligned_register_pair) {
+            return syscall4(
+                SYS_ftruncate64,
+                @bitCast(usize, @as(isize, fd)),
+                0,
+                @truncate(usize, length),
+                @truncate(usize, length >> 32),
+            );
+        } else {
+            return syscall3(
+                SYS_ftruncate64,
+                @bitCast(usize, @as(isize, fd)),
+                @truncate(usize, length),
+                @truncate(usize, length >> 32),
+            );
+        }
+    } else {
+        return syscall2(
+            SYS_ftruncate,
+            @bitCast(usize, @as(isize, fd)),
+            @truncate(usize, length),
+        );
+    }
+}
+
 pub fn pwrite(fd: i32, buf: [*]const u8, count: usize, offset: usize) usize {
-    return syscall4(SYS_pwrite, @bitCast(usize, @as(isize, fd)), @ptrToInt(buf), count, offset);
+    if (@hasDecl(@This(), "SYS_pwrite64")) {
+        if (require_aligned_register_pair) {
+            return syscall6(
+                SYS_pwrite64,
+                @bitCast(usize, @as(isize, fd)),
+                @ptrToInt(buf),
+                count,
+                0,
+                @truncate(usize, offset),
+                @truncate(usize, offset >> 32),
+            );
+        } else {
+            return syscall5(
+                SYS_pwrite64,
+                @bitCast(usize, @as(isize, fd)),
+                @ptrToInt(buf),
+                count,
+                @truncate(usize, offset),
+                @truncate(usize, offset >> 32),
+            );
+        }
+    } else {
+        return syscall4(
+            SYS_pwrite,
+            @bitCast(usize, @as(isize, fd)),
+            @ptrToInt(buf),
+            count,
+            offset,
+        );
+    }
 }
 
 pub fn rename(old: [*:0]const u8, new: [*:0]const u8) usize {
diff --git a/lib/std/os/test.zig b/lib/std/os/test.zig
index 5f97597537..1ef6798b50 100644
--- a/lib/std/os/test.zig
+++ b/lib/std/os/test.zig
@@ -95,15 +95,41 @@ test "sendfile" {
         },
     };
 
-    var written_buf: [header1.len + header2.len + 10 + trailer1.len + trailer2.len]u8 = undefined;
+    var written_buf: [100]u8 = undefined;
     try dest_file.writeFileAll(src_file, .{
         .in_offset = 1,
         .in_len = 10,
         .headers_and_trailers = &hdtr,
         .header_count = 2,
     });
-    try dest_file.preadAll(&written_buf, 0);
-    expect(mem.eql(u8, &written_buf, "header1\nsecond header\nine1\nsecontrailer1\nsecond trailer\n"));
+    const amt = try dest_file.preadAll(&written_buf, 0);
+    expect(mem.eql(u8, written_buf[0..amt], "header1\nsecond header\nine1\nsecontrailer1\nsecond trailer\n"));
+}
+
+test "fs.copyFile" {
+    const data = "u6wj+JmdF3qHsFPE BUlH2g4gJCmEz0PP";
+    const src_file = "tmp_test_copy_file.txt";
+    const dest_file = "tmp_test_copy_file2.txt";
+    const dest_file2 = "tmp_test_copy_file3.txt";
+
+    try fs.cwd().writeFile(src_file, data);
+    defer fs.cwd().deleteFile(src_file) catch {};
+
+    try fs.copyFile(src_file, dest_file);
+    defer fs.cwd().deleteFile(dest_file) catch {};
+
+    try fs.copyFileMode(src_file, dest_file2, File.default_mode);
+    defer fs.cwd().deleteFile(dest_file2) catch {};
+
+    try expectFileContents(dest_file, data);
+    try expectFileContents(dest_file2, data);
+}
+
+fn expectFileContents(file_path: []const u8, data: []const u8) !void {
+    const contents = try fs.cwd().readFileAlloc(testing.allocator, file_path, 1000);
+    defer testing.allocator.free(contents);
+
+    testing.expectEqualSlices(u8, data, contents);
 }
 
 test "std.Thread.getCurrentId" {
@@ -354,8 +380,7 @@ test "mmap" {
         const file = try fs.cwd().createFile(test_out_file, .{});
         defer file.close();
 
-        var out_stream = file.outStream();
-        const stream = &out_stream.stream;
+        const stream = file.outStream();
 
         var i: u32 = 0;
         while (i < alloc_size / @sizeOf(u32)) : (i += 1) {
@@ -378,8 +403,8 @@ test "mmap" {
         );
         defer os.munmap(data);
 
-        var mem_stream = io.SliceInStream.init(data);
-        const stream = &mem_stream.stream;
+        var mem_stream = io.fixedBufferStream(data);
+        const stream = mem_stream.inStream();
 
         var i: u32 = 0;
         while (i < alloc_size / @sizeOf(u32)) : (i += 1) {
@@ -402,8 +427,8 @@ test "mmap" {
         );
         defer os.munmap(data);
 
-        var mem_stream = io.SliceInStream.init(data);
-        const stream = &mem_stream.stream;
+        var mem_stream = io.fixedBufferStream(data);
+        const stream = mem_stream.inStream();
 
         var i: u32 = alloc_size / 2 / @sizeOf(u32);
         while (i < alloc_size / @sizeOf(u32)) : (i += 1) {
diff --git a/lib/std/os/uefi.zig b/lib/std/os/uefi.zig
index 81d13ac1c3..64ee81150e 100644
--- a/lib/std/os/uefi.zig
+++ b/lib/std/os/uefi.zig
@@ -2,11 +2,9 @@
 pub const protocols = @import("uefi/protocols.zig");
 
 /// Status codes returned by EFI interfaces
-pub const status = @import("uefi/status.zig");
+pub const Status = @import("uefi/status.zig").Status;
 pub const tables = @import("uefi/tables.zig");
 
-const fmt = @import("std").fmt;
-
 /// The EFI image's handle that is passed to its entry point.
 pub var handle: Handle = undefined;
 
@@ -29,13 +27,11 @@ pub const Guid = extern struct {
     pub fn format(
         self: @This(),
         comptime f: []const u8,
-        options: fmt.FormatOptions,
-        context: var,
-        comptime Errors: type,
-        output: fn (@TypeOf(context), []const u8) Errors!void,
+        options: std.fmt.FormatOptions,
+        out_stream: var,
     ) Errors!void {
         if (f.len == 0) {
-            return fmt.format(context, Errors, output, "{x:0>8}-{x:0>4}-{x:0>4}-{x:0>2}{x:0>2}-{x:0>12}", .{
+            return std.fmt.format(out_stream, "{x:0>8}-{x:0>4}-{x:0>4}-{x:0>2}{x:0>2}-{x:0>12}", .{
                 self.time_low,
                 self.time_mid,
                 self.time_high_and_version,
@@ -105,3 +101,6 @@ pub const TimeCapabilities = extern struct {
     /// If true, a time set operation clears the device's time below the resolution level.
     sets_to_zero: bool,
 };
+
+/// File Handle as specified in the EFI Shell Spec
+pub const FileHandle = *@OpaqueType();
diff --git a/lib/std/os/uefi/protocols.zig b/lib/std/os/uefi/protocols.zig
index 58f342ac22..353c628a05 100644
--- a/lib/std/os/uefi/protocols.zig
+++ b/lib/std/os/uefi/protocols.zig
@@ -1,6 +1,19 @@
 pub const LoadedImageProtocol = @import("protocols/loaded_image_protocol.zig").LoadedImageProtocol;
+pub const loaded_image_device_path_protocol_guid = @import("protocols/loaded_image_protocol.zig").loaded_image_device_path_protocol_guid;
 
+pub const AcpiDevicePath = @import("protocols/device_path_protocol.zig").AcpiDevicePath;
+pub const BiosBootSpecificationDevicePath = @import("protocols/device_path_protocol.zig").BiosBootSpecificationDevicePath;
+pub const DevicePath = @import("protocols/device_path_protocol.zig").DevicePath;
 pub const DevicePathProtocol = @import("protocols/device_path_protocol.zig").DevicePathProtocol;
+pub const DevicePathType = @import("protocols/device_path_protocol.zig").DevicePathType;
+pub const EndDevicePath = @import("protocols/device_path_protocol.zig").EndDevicePath;
+pub const HardwareDevicePath = @import("protocols/device_path_protocol.zig").HardwareDevicePath;
+pub const MediaDevicePath = @import("protocols/device_path_protocol.zig").MediaDevicePath;
+pub const MessagingDevicePath = @import("protocols/device_path_protocol.zig").MessagingDevicePath;
+
+pub const SimpleFileSystemProtocol = @import("protocols/simple_file_system_protocol.zig").SimpleFileSystemProtocol;
+pub const FileProtocol = @import("protocols/file_protocol.zig").FileProtocol;
+pub const FileInfo = @import("protocols/file_protocol.zig").FileInfo;
 
 pub const InputKey = @import("protocols/simple_text_input_ex_protocol.zig").InputKey;
 pub const KeyData = @import("protocols/simple_text_input_ex_protocol.zig").KeyData;
@@ -82,3 +95,5 @@ pub const HIIPopupType = @import("protocols/hii_popup_protocol.zig").HIIPopupTyp
 pub const HIIPopupSelection = @import("protocols/hii_popup_protocol.zig").HIIPopupSelection;
 
 pub const RNGProtocol = @import("protocols/rng_protocol.zig").RNGProtocol;
+
+pub const ShellParametersProtocol = @import("protocols/shell_parameters_protocol.zig").ShellParametersProtocol;
diff --git a/lib/std/os/uefi/protocols/absolute_pointer_protocol.zig b/lib/std/os/uefi/protocols/absolute_pointer_protocol.zig
index 722972a202..1a46b9cf2c 100644
--- a/lib/std/os/uefi/protocols/absolute_pointer_protocol.zig
+++ b/lib/std/os/uefi/protocols/absolute_pointer_protocol.zig
@@ -1,21 +1,22 @@
 const uefi = @import("std").os.uefi;
 const Event = uefi.Event;
 const Guid = uefi.Guid;
+const Status = uefi.Status;
 
 /// Protocol for touchscreens
 pub const AbsolutePointerProtocol = extern struct {
-    _reset: extern fn (*const AbsolutePointerProtocol, bool) usize,
-    _get_state: extern fn (*const AbsolutePointerProtocol, *AbsolutePointerState) usize,
+    _reset: extern fn (*const AbsolutePointerProtocol, bool) Status,
+    _get_state: extern fn (*const AbsolutePointerProtocol, *AbsolutePointerState) Status,
     wait_for_input: Event,
     mode: *AbsolutePointerMode,
 
     /// Resets the pointer device hardware.
-    pub fn reset(self: *const AbsolutePointerProtocol, verify: bool) usize {
+    pub fn reset(self: *const AbsolutePointerProtocol, verify: bool) Status {
         return self._reset(self, verify);
     }
 
     /// Retrieves the current state of a pointer device.
-    pub fn getState(self: *const AbsolutePointerProtocol, state: *AbsolutePointerState) usize {
+    pub fn getState(self: *const AbsolutePointerProtocol, state: *AbsolutePointerState) Status {
         return self._get_state(self, state);
     }
 
diff --git a/lib/std/os/uefi/protocols/device_path_protocol.zig b/lib/std/os/uefi/protocols/device_path_protocol.zig
index a945608f88..f359484eb9 100644
--- a/lib/std/os/uefi/protocols/device_path_protocol.zig
+++ b/lib/std/os/uefi/protocols/device_path_protocol.zig
@@ -1,8 +1,8 @@
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 
-pub const DevicePathProtocol = extern struct {
-    type: u8,
+pub const DevicePathProtocol = packed struct {
+    type: DevicePathType,
     subtype: u8,
     length: u16,
 
@@ -14,4 +14,340 @@ pub const DevicePathProtocol = extern struct {
         .clock_seq_low = 0x39,
         .node = [_]u8{ 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b },
     };
+
+    pub fn getDevicePath(self: *const DevicePathProtocol) ?DevicePath {
+        return switch (self.type) {
+            .Hardware => blk: {
+                const hardware: ?HardwareDevicePath = switch (@intToEnum(HardwareDevicePath.Subtype, self.subtype)) {
+                    .Pci => .{ .Pci = @ptrCast(*const HardwareDevicePath.PciDevicePath, self) },
+                    .PcCard => .{ .PcCard = @ptrCast(*const HardwareDevicePath.PcCardDevicePath, self) },
+                    .MemoryMapped => .{ .MemoryMapped = @ptrCast(*const HardwareDevicePath.MemoryMappedDevicePath, self) },
+                    .Vendor => .{ .Vendor = @ptrCast(*const HardwareDevicePath.VendorDevicePath, self) },
+                    .Controller => .{ .Controller = @ptrCast(*const HardwareDevicePath.ControllerDevicePath, self) },
+                    .Bmc => .{ .Bmc = @ptrCast(*const HardwareDevicePath.BmcDevicePath, self) },
+                    _ => null,
+                };
+                break :blk if (hardware) |h| .{ .Hardware = h } else null;
+            },
+            .Acpi => blk: {
+                const acpi: ?AcpiDevicePath = switch (@intToEnum(AcpiDevicePath.Subtype, self.subtype)) {
+                    else => null, // TODO
+                };
+                break :blk if (acpi) |a| .{ .Acpi = a } else null;
+            },
+            .Messaging => blk: {
+                const messaging: ?MessagingDevicePath = switch (@intToEnum(MessagingDevicePath.Subtype, self.subtype)) {
+                    else => null, // TODO
+                };
+                break :blk if (messaging) |m| .{ .Messaging = m } else null;
+            },
+            .Media => blk: {
+                const media: ?MediaDevicePath = switch (@intToEnum(MediaDevicePath.Subtype, self.subtype)) {
+                    .HardDrive => .{ .HardDrive = @ptrCast(*const MediaDevicePath.HardDriveDevicePath, self) },
+                    .Cdrom => .{ .Cdrom = @ptrCast(*const MediaDevicePath.CdromDevicePath, self) },
+                    .Vendor => .{ .Vendor = @ptrCast(*const MediaDevicePath.VendorDevicePath, self) },
+                    .FilePath => .{ .FilePath = @ptrCast(*const MediaDevicePath.FilePathDevicePath, self) },
+                    .MediaProtocol => .{ .MediaProtocol = @ptrCast(*const MediaDevicePath.MediaProtocolDevicePath, self) },
+                    .PiwgFirmwareFile => .{ .PiwgFirmwareFile = @ptrCast(*const MediaDevicePath.PiwgFirmwareFileDevicePath, self) },
+                    .PiwgFirmwareVolume => .{ .PiwgFirmwareVolume = @ptrCast(*const MediaDevicePath.PiwgFirmwareVolumeDevicePath, self) },
+                    .RelativeOffsetRange => .{ .RelativeOffsetRange = @ptrCast(*const MediaDevicePath.RelativeOffsetRangeDevicePath, self) },
+                    .RamDisk => .{ .RamDisk = @ptrCast(*const MediaDevicePath.RamDiskDevicePath, self) },
+                    _ => null,
+                };
+                break :blk if (media) |m| .{ .Media = m } else null;
+            },
+            .BiosBootSpecification => blk: {
+                const bbs: ?BiosBootSpecificationDevicePath = switch (@intToEnum(BiosBootSpecificationDevicePath.Subtype, self.subtype)) {
+                    .BBS101 => .{ .BBS101 = @ptrCast(*const BiosBootSpecificationDevicePath.BBS101DevicePath, self) },
+                    _ => null,
+                };
+                break :blk if (bbs) |b| .{ .BiosBootSpecification = b } else null;
+            },
+            .End => blk: {
+                const end: ?EndDevicePath = switch (@intToEnum(EndDevicePath.Subtype, self.subtype)) {
+                    .EndEntire => .{ .EndEntire = @ptrCast(*const EndDevicePath.EndEntireDevicePath, self) },
+                    .EndThisInstance => .{ .EndThisInstance = @ptrCast(*const EndDevicePath.EndThisInstanceDevicePath, self) },
+                    _ => null,
+                };
+                break :blk if (end) |e| .{ .End = e } else null;
+            },
+            _ => null,
+        };
+    }
+};
+
+pub const DevicePath = union(DevicePathType) {
+    Hardware: HardwareDevicePath,
+    Acpi: AcpiDevicePath,
+    Messaging: MessagingDevicePath,
+    Media: MediaDevicePath,
+    BiosBootSpecification: BiosBootSpecificationDevicePath,
+    End: EndDevicePath,
+};
+
+pub const DevicePathType = extern enum(u8) {
+    Hardware = 0x01,
+    Acpi = 0x02,
+    Messaging = 0x03,
+    Media = 0x04,
+    BiosBootSpecification = 0x05,
+    End = 0x7f,
+    _,
+};
+
+pub const HardwareDevicePath = union(Subtype) {
+    Pci: *const PciDevicePath,
+    PcCard: *const PcCardDevicePath,
+    MemoryMapped: *const MemoryMappedDevicePath,
+    Vendor: *const VendorDevicePath,
+    Controller: *const ControllerDevicePath,
+    Bmc: *const BmcDevicePath,
+
+    pub const Subtype = extern enum(u8) {
+        Pci = 1,
+        PcCard = 2,
+        MemoryMapped = 3,
+        Vendor = 4,
+        Controller = 5,
+        Bmc = 6,
+        _,
+    };
+
+    pub const PciDevicePath = packed struct {
+        type: DevicePathType,
+        subtype: Subtype,
+        length: u16,
+        // TODO
+    };
+
+    pub const PcCardDevicePath = packed struct {
+        type: DevicePathType,
+        subtype: Subtype,
+        length: u16,
+        // TODO
+    };
+
+    pub const MemoryMappedDevicePath = packed struct {
+        type: DevicePathType,
+        subtype: Subtype,
+        length: u16,
+        // TODO
+    };
+
+    pub const VendorDevicePath = packed struct {
+        type: DevicePathType,
+        subtype: Subtype,
+        length: u16,
+        // TODO
+    };
+
+    pub const ControllerDevicePath = packed struct {
+        type: DevicePathType,
+        subtype: Subtype,
+        length: u16,
+        // TODO
+    };
+
+    pub const BmcDevicePath = packed struct {
+        type: DevicePathType,
+        subtype: Subtype,
+        length: u16,
+        // TODO
+    };
+};
+
+pub const AcpiDevicePath = union(Subtype) {
+    Acpi: void, // TODO
+    ExpandedAcpi: void, // TODO
+    Adr: void, // TODO
+    Nvdimm: void, // TODO
+
+    pub const Subtype = extern enum(u8) {
+        Acpi = 1,
+        ExpandedAcpi = 2,
+        Adr = 3,
+        Nvdimm = 4,
+        _,
+    };
+};
+
+pub const MessagingDevicePath = union(Subtype) {
+    Atapi: void, // TODO
+    Scsi: void, // TODO
+    FibreChannel: void, // TODO
+    FibreChannelEx: void, // TODO
+    @"1394": void, // TODO
+    Usb: void, // TODO
+    Sata: void, // TODO
+    UsbWwid: void, // TODO
+    Lun: void, // TODO
+    UsbClass: void, // TODO
+    I2o: void, // TODO
+    MacAddress: void, // TODO
+    Ipv4: void, // TODO
+    Ipv6: void, // TODO
+    Vlan: void, // TODO
+    InfiniBand: void, // TODO
+    Uart: void, // TODO
+    Vendor: void, // TODO
+
+    pub const Subtype = extern enum(u8) {
+        Atapi = 1,
+        Scsi = 2,
+        FibreChannel = 3,
+        FibreChannelEx = 21,
+        @"1394" = 4,
+        Usb = 5,
+        Sata = 18,
+        UsbWwid = 16,
+        Lun = 17,
+        UsbClass = 15,
+        I2o = 6,
+        MacAddress = 11,
+        Ipv4 = 12,
+        Ipv6 = 13,
+        Vlan = 20,
+        InfiniBand = 9,
+        Uart = 14,
+        Vendor = 10,
+        _,
+    };
+};
+
+pub const MediaDevicePath = union(Subtype) {
+    HardDrive: *const HardDriveDevicePath,
+    Cdrom: *const CdromDevicePath,
+    Vendor: *const VendorDevicePath,
+    FilePath: *const FilePathDevicePath,
+    MediaProtocol: *const MediaProtocolDevicePath,
+    PiwgFirmwareFile: *const PiwgFirmwareFileDevicePath,
+    PiwgFirmwareVolume: *const PiwgFirmwareVolumeDevicePath,
+    RelativeOffsetRange: *const RelativeOffsetRangeDevicePath,
+    RamDisk: *const RamDiskDevicePath,
+
+    pub const Subtype = extern enum(u8) {
+        HardDrive = 1,
+        Cdrom = 2,
+        Vendor = 3,
+        FilePath = 4,
+        MediaProtocol = 5,
+        PiwgFirmwareFile = 6,
+        PiwgFirmwareVolume = 7,
+        RelativeOffsetRange = 8,
+        RamDisk = 9,
+        _,
+    };
+
+    pub const HardDriveDevicePath = packed struct {
+        type: DevicePathType,
+        subtype: Subtype,
+        length: u16,
+        // TODO
+    };
+
+    pub const CdromDevicePath = packed struct {
+        type: DevicePathType,
+        subtype: Subtype,
+        length: u16,
+        // TODO
+    };
+
+    pub const VendorDevicePath = packed struct {
+        type: DevicePathType,
+        subtype: Subtype,
+        length: u16,
+        // TODO
+    };
+
+    pub const FilePathDevicePath = packed struct {
+        type: DevicePathType,
+        subtype: Subtype,
+        length: u16,
+
+        pub fn getPath(self: *const FilePathDevicePath) [*:0]const u16 {
+            return @ptrCast([*:0]const u16, @alignCast(2, @ptrCast([*]const u8, self)) + @sizeOf(FilePathDevicePath));
+        }
+    };
+
+    pub const MediaProtocolDevicePath = packed struct {
+        type: DevicePathType,
+        subtype: Subtype,
+        length: u16,
+        // TODO
+    };
+
+    pub const PiwgFirmwareFileDevicePath = packed struct {
+        type: DevicePathType,
+        subtype: Subtype,
+        length: u16,
+    };
+
+    pub const PiwgFirmwareVolumeDevicePath = packed struct {
+        type: DevicePathType,
+        subtype: Subtype,
+        length: u16,
+    };
+
+    pub const RelativeOffsetRangeDevicePath = packed struct {
+        type: DevicePathType,
+        subtype: Subtype,
+        length: u16,
+        reserved: u32,
+        start: u64,
+        end: u64,
+    };
+
+    pub const RamDiskDevicePath = packed struct {
+        type: DevicePathType,
+        subtype: Subtype,
+        length: u16,
+        start: u64,
+        end: u64,
+        disk_type: uefi.Guid,
+        instance: u16,
+    };
+};
+
+pub const BiosBootSpecificationDevicePath = union(Subtype) {
+    BBS101: *const BBS101DevicePath,
+
+    pub const Subtype = extern enum(u8) {
+        BBS101 = 1,
+        _,
+    };
+
+    pub const BBS101DevicePath = packed struct {
+        type: DevicePathType,
+        subtype: Subtype,
+        length: u16,
+        device_type: u16,
+        status_flag: u16,
+
+        pub fn getDescription(self: *const BBS101DevicePath) [*:0]const u8 {
+            return @ptrCast([*:0]const u8, self) + @sizeOf(BBS101DevicePath);
+        }
+    };
+};
+
+pub const EndDevicePath = union(Subtype) {
+    EndEntire: *const EndEntireDevicePath,
+    EndThisInstance: *const EndThisInstanceDevicePath,
+
+    pub const Subtype = extern enum(u8) {
+        EndEntire = 0xff,
+        EndThisInstance = 0x01,
+        _,
+    };
+
+    pub const EndEntireDevicePath = packed struct {
+        type: DevicePathType,
+        subtype: Subtype,
+        length: u16,
+    };
+
+    pub const EndThisInstanceDevicePath = packed struct {
+        type: DevicePathType,
+        subtype: Subtype,
+        length: u16,
+    };
 };
diff --git a/lib/std/os/uefi/protocols/edid_override_protocol.zig b/lib/std/os/uefi/protocols/edid_override_protocol.zig
index c11af8f0a1..2c37baa7a4 100644
--- a/lib/std/os/uefi/protocols/edid_override_protocol.zig
+++ b/lib/std/os/uefi/protocols/edid_override_protocol.zig
@@ -1,14 +1,15 @@
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const Handle = uefi.Handle;
+const Status = uefi.Status;
 
 /// Override EDID information
 pub const EdidOverrideProtocol = extern struct {
-    _get_edid: extern fn (*const EdidOverrideProtocol, Handle, *u32, *usize, *?[*]u8) usize,
+    _get_edid: extern fn (*const EdidOverrideProtocol, Handle, *u32, *usize, *?[*]u8) Status,
 
     /// Returns policy information and potentially a replacement EDID for the specified video output device.
     /// attributes must be align(4)
-    pub fn getEdid(self: *const EdidOverrideProtocol, handle: Handle, attributes: *EdidOverrideProtocolAttributes, edid_size: *usize, edid: *?[*]u8) usize {
+    pub fn getEdid(self: *const EdidOverrideProtocol, handle: Handle, attributes: *EdidOverrideProtocolAttributes, edid_size: *usize, edid: *?[*]u8) Status {
         return self._get_edid(self, handle, attributes, edid_size, edid);
     }
 
diff --git a/lib/std/os/uefi/protocols/file_protocol.zig b/lib/std/os/uefi/protocols/file_protocol.zig
new file mode 100644
index 0000000000..fb5810d4f4
--- /dev/null
+++ b/lib/std/os/uefi/protocols/file_protocol.zig
@@ -0,0 +1,91 @@
+const uefi = @import("std").os.uefi;
+const Guid = uefi.Guid;
+const Time = uefi.Time;
+const Status = uefi.Status;
+
+pub const FileProtocol = extern struct {
+    revision: u64,
+    _open: extern fn (*const FileProtocol, **const FileProtocol, [*:0]const u16, u64, u64) Status,
+    _close: extern fn (*const FileProtocol) Status,
+    _delete: extern fn (*const FileProtocol) Status,
+    _read: extern fn (*const FileProtocol, *usize, [*]u8) Status,
+    _write: extern fn (*const FileProtocol, *usize, [*]const u8) Status,
+    _get_info: extern fn (*const FileProtocol, *Guid, *usize, *c_void) Status,
+    _set_info: extern fn (*const FileProtocol, *Guid, usize, *const c_void) Status,
+    _flush: extern fn (*const FileProtocol) Status,
+
+    pub fn open(self: *const FileProtocol, new_handle: **const FileProtocol, file_name: [*:0]const u16, open_mode: u64, attributes: u64) Status {
+        return self._open(self, new_handle, file_name, open_mode, attributes);
+    }
+
+    pub fn close(self: *const FileProtocol) Status {
+        return self._close(self);
+    }
+
+    pub fn delete(self: *const FileProtocol) Status {
+        return self._delete(self);
+    }
+
+    pub fn read(self: *const FileProtocol, buffer_size: *usize, buffer: [*]u8) Status {
+        return self._read(self, buffer_size, buffer);
+    }
+
+    pub fn write(self: *const FileProtocol, buffer_size: *usize, buffer: [*]const u8) Status {
+        return self._write(self, buffer_size, buffer);
+    }
+
+    pub fn get_info(self: *const FileProtocol, information_type: *Guid, buffer_size: *usize, buffer: *c_void) Status {
+        return self._get_info(self, information_type, buffer_size, buffer);
+    }
+
+    pub fn set_info(self: *const FileProtocol, information_type: *Guid, buffer_size: usize, buffer: *const c_void) Status {
+        return self._set_info(self, information_type, buffer_size, buffer);
+    }
+
+    pub fn flush(self: *const FileProtocol) Status {
+        return self._flush(self);
+    }
+
+    pub const guid align(8) = Guid{
+        .time_low = 0x09576e92,
+        .time_mid = 0x6d3f,
+        .time_high_and_version = 0x11d2,
+        .clock_seq_high_and_reserved = 0x8e,
+        .clock_seq_low = 0x39,
+        .node = [_]u8{ 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b },
+    };
+
+    pub const efi_file_mode_read: u64 = 0x0000000000000001;
+    pub const efi_file_mode_write: u64 = 0x0000000000000002;
+    pub const efi_file_mode_create: u64 = 0x8000000000000000;
+
+    pub const efi_file_read_only: u64 = 0x0000000000000001;
+    pub const efi_file_hidden: u64 = 0x0000000000000002;
+    pub const efi_file_system: u64 = 0x0000000000000004;
+    pub const efi_file_reserved: u64 = 0x0000000000000008;
+    pub const efi_file_directory: u64 = 0x0000000000000010;
+    pub const efi_file_archive: u64 = 0x0000000000000020;
+    pub const efi_file_valid_attr: u64 = 0x0000000000000037;
+};
+
+pub const FileInfo = extern struct {
+    size: u64,
+    file_size: u64,
+    physical_size: u64,
+    create_time: Time,
+    last_access_time: Time,
+    modification_time: Time,
+    attribute: u64,
+
+    pub fn getFileName(self: *const FileInfo) [*:0]const u16 {
+        return @ptrCast([*:0]const u16, @ptrCast([*]const u8, self) + @sizeOf(FileInfo));
+    }
+
+    pub const efi_file_read_only: u64 = 0x0000000000000001;
+    pub const efi_file_hidden: u64 = 0x0000000000000002;
+    pub const efi_file_system: u64 = 0x0000000000000004;
+    pub const efi_file_reserved: u64 = 0x0000000000000008;
+    pub const efi_file_directory: u64 = 0x0000000000000010;
+    pub const efi_file_archive: u64 = 0x0000000000000020;
+    pub const efi_file_valid_attr: u64 = 0x0000000000000037;
+};
diff --git a/lib/std/os/uefi/protocols/graphics_output_protocol.zig b/lib/std/os/uefi/protocols/graphics_output_protocol.zig
index f63f9d12dc..7370f537bf 100644
--- a/lib/std/os/uefi/protocols/graphics_output_protocol.zig
+++ b/lib/std/os/uefi/protocols/graphics_output_protocol.zig
@@ -1,25 +1,26 @@
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
+const Status = uefi.Status;
 
 /// Graphics output
 pub const GraphicsOutputProtocol = extern struct {
-    _query_mode: extern fn (*const GraphicsOutputProtocol, u32, *usize, **GraphicsOutputModeInformation) usize,
-    _set_mode: extern fn (*const GraphicsOutputProtocol, u32) usize,
-    _blt: extern fn (*const GraphicsOutputProtocol, ?[*]GraphicsOutputBltPixel, GraphicsOutputBltOperation, usize, usize, usize, usize, usize, usize, usize) usize,
+    _query_mode: extern fn (*const GraphicsOutputProtocol, u32, *usize, **GraphicsOutputModeInformation) Status,
+    _set_mode: extern fn (*const GraphicsOutputProtocol, u32) Status,
+    _blt: extern fn (*const GraphicsOutputProtocol, ?[*]GraphicsOutputBltPixel, GraphicsOutputBltOperation, usize, usize, usize, usize, usize, usize, usize) Status,
     mode: *GraphicsOutputProtocolMode,
 
     /// Returns information for an available graphics mode that the graphics device and the set of active video output devices supports.
-    pub fn queryMode(self: *const GraphicsOutputProtocol, mode: u32, size_of_info: *usize, info: **GraphicsOutputModeInformation) usize {
+    pub fn queryMode(self: *const GraphicsOutputProtocol, mode: u32, size_of_info: *usize, info: **GraphicsOutputModeInformation) Status {
         return self._query_mode(self, mode, size_of_info, info);
     }
 
     /// Set the video device into the specified mode and clears the visible portions of the output display to black.
-    pub fn setMode(self: *const GraphicsOutputProtocol, mode: u32) usize {
+    pub fn setMode(self: *const GraphicsOutputProtocol, mode: u32) Status {
         return self._set_mode(self, mode);
     }
 
     /// Blt a rectangle of pixels on the graphics screen. Blt stands for BLock Transfer.
-    pub fn blt(self: *const GraphicsOutputProtocol, blt_buffer: ?[*]GraphicsOutputBltPixel, blt_operation: GraphicsOutputBltOperation, source_x: usize, source_y: usize, destination_x: usize, destination_y: usize, width: usize, height: usize, delta: usize) usize {
+    pub fn blt(self: *const GraphicsOutputProtocol, blt_buffer: ?[*]GraphicsOutputBltPixel, blt_operation: GraphicsOutputBltOperation, source_x: usize, source_y: usize, destination_x: usize, destination_y: usize, width: usize, height: usize, delta: usize) Status {
         return self._blt(self, blt_buffer, blt_operation, source_x, source_y, destination_x, destination_y, width, height, delta);
     }
 
diff --git a/lib/std/os/uefi/protocols/hii_database_protocol.zig b/lib/std/os/uefi/protocols/hii_database_protocol.zig
index aaacce8462..c79f693f6f 100644
--- a/lib/std/os/uefi/protocols/hii_database_protocol.zig
+++ b/lib/std/os/uefi/protocols/hii_database_protocol.zig
@@ -1,38 +1,39 @@
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
+const Status = uefi.Status;
 const hii = uefi.protocols.hii;
 
 /// Database manager for HII-related data structures.
 pub const HIIDatabaseProtocol = extern struct {
-    _new_package_list: usize, // TODO
-    _remove_package_list: extern fn (*const HIIDatabaseProtocol, hii.HIIHandle) usize,
-    _update_package_list: extern fn (*const HIIDatabaseProtocol, hii.HIIHandle, *const hii.HIIPackageList) usize,
-    _list_package_lists: extern fn (*const HIIDatabaseProtocol, u8, ?*const Guid, *usize, [*]hii.HIIHandle) usize,
-    _export_package_lists: extern fn (*const HIIDatabaseProtocol, ?hii.HIIHandle, *usize, *hii.HIIPackageList) usize,
-    _register_package_notify: usize, // TODO
-    _unregister_package_notify: usize, // TODO
-    _find_keyboard_layouts: usize, // TODO
-    _get_keyboard_layout: usize, // TODO
-    _set_keyboard_layout: usize, // TODO
-    _get_package_list_handle: usize, // TODO
+    _new_package_list: Status, // TODO
+    _remove_package_list: extern fn (*const HIIDatabaseProtocol, hii.HIIHandle) Status,
+    _update_package_list: extern fn (*const HIIDatabaseProtocol, hii.HIIHandle, *const hii.HIIPackageList) Status,
+    _list_package_lists: extern fn (*const HIIDatabaseProtocol, u8, ?*const Guid, *usize, [*]hii.HIIHandle) Status,
+    _export_package_lists: extern fn (*const HIIDatabaseProtocol, ?hii.HIIHandle, *usize, *hii.HIIPackageList) Status,
+    _register_package_notify: Status, // TODO
+    _unregister_package_notify: Status, // TODO
+    _find_keyboard_layouts: Status, // TODO
+    _get_keyboard_layout: Status, // TODO
+    _set_keyboard_layout: Status, // TODO
+    _get_package_list_handle: Status, // TODO
 
     /// Removes a package list from the HII database.
-    pub fn removePackageList(self: *const HIIDatabaseProtocol, handle: hii.HIIHandle) usize {
+    pub fn removePackageList(self: *const HIIDatabaseProtocol, handle: hii.HIIHandle) Status {
         return self._remove_package_list(self, handle);
     }
 
     /// Update a package list in the HII database.
-    pub fn updatePackageList(self: *const HIIDatabaseProtocol, handle: hii.HIIHandle, buffer: *const hii.HIIPackageList) usize {
+    pub fn updatePackageList(self: *const HIIDatabaseProtocol, handle: hii.HIIHandle, buffer: *const hii.HIIPackageList) Status {
         return self._update_package_list(self, handle, buffer);
     }
 
     /// Determines the handles that are currently active in the database.
-    pub fn listPackageLists(self: *const HIIDatabaseProtocol, package_type: u8, package_guid: ?*const Guid, buffer_length: *usize, handles: [*]hii.HIIHandle) usize {
+    pub fn listPackageLists(self: *const HIIDatabaseProtocol, package_type: u8, package_guid: ?*const Guid, buffer_length: *usize, handles: [*]hii.HIIHandle) Status {
         return self._list_package_lists(self, package_type, package_guid, buffer_length, handles);
     }
 
     /// Exports the contents of one or all package lists in the HII database into a buffer.
-    pub fn exportPackageLists(self: *const HIIDatabaseProtocol, handle: ?hii.HIIHandle, buffer_size: *usize, buffer: *hii.HIIPackageList) usize {
+    pub fn exportPackageLists(self: *const HIIDatabaseProtocol, handle: ?hii.HIIHandle, buffer_size: *usize, buffer: *hii.HIIPackageList) Status {
         return self._export_package_lists(self, handle, buffer_size, buffer);
     }
 
diff --git a/lib/std/os/uefi/protocols/hii_popup_protocol.zig b/lib/std/os/uefi/protocols/hii_popup_protocol.zig
index 3152a8b7a8..96afe21fbc 100644
--- a/lib/std/os/uefi/protocols/hii_popup_protocol.zig
+++ b/lib/std/os/uefi/protocols/hii_popup_protocol.zig
@@ -1,14 +1,15 @@
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
+const Status = uefi.Status;
 const hii = uefi.protocols.hii;
 
 /// Display a popup window
 pub const HIIPopupProtocol = extern struct {
     revision: u64,
-    _create_popup: extern fn (*const HIIPopupProtocol, HIIPopupStyle, HIIPopupType, hii.HIIHandle, u16, ?*HIIPopupSelection) usize,
+    _create_popup: extern fn (*const HIIPopupProtocol, HIIPopupStyle, HIIPopupType, hii.HIIHandle, u16, ?*HIIPopupSelection) Status,
 
     /// Displays a popup window.
-    pub fn createPopup(self: *const HIIPopupProtocol, style: HIIPopupStyle, popup_type: HIIPopupType, handle: hii.HIIHandle, msg: u16, user_selection: ?*HIIPopupSelection) usize {
+    pub fn createPopup(self: *const HIIPopupProtocol, style: HIIPopupStyle, popup_type: HIIPopupType, handle: hii.HIIHandle, msg: u16, user_selection: ?*HIIPopupSelection) Status {
         return self._create_popup(self, style, popup_type, handle, msg, user_selection);
     }
 
diff --git a/lib/std/os/uefi/protocols/ip6_config_protocol.zig b/lib/std/os/uefi/protocols/ip6_config_protocol.zig
index a86e2cbba2..89ff39e8d1 100644
--- a/lib/std/os/uefi/protocols/ip6_config_protocol.zig
+++ b/lib/std/os/uefi/protocols/ip6_config_protocol.zig
@@ -1,26 +1,27 @@
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const Event = uefi.Event;
+const Status = uefi.Status;
 
 pub const Ip6ConfigProtocol = extern struct {
-    _set_data: extern fn (*const Ip6ConfigProtocol, Ip6ConfigDataType, usize, *const c_void) usize,
-    _get_data: extern fn (*const Ip6ConfigProtocol, Ip6ConfigDataType, *usize, ?*const c_void) usize,
-    _register_data_notify: extern fn (*const Ip6ConfigProtocol, Ip6ConfigDataType, Event) usize,
-    _unregister_data_notify: extern fn (*const Ip6ConfigProtocol, Ip6ConfigDataType, Event) usize,
+    _set_data: extern fn (*const Ip6ConfigProtocol, Ip6ConfigDataType, usize, *const c_void) Status,
+    _get_data: extern fn (*const Ip6ConfigProtocol, Ip6ConfigDataType, *usize, ?*const c_void) Status,
+    _register_data_notify: extern fn (*const Ip6ConfigProtocol, Ip6ConfigDataType, Event) Status,
+    _unregister_data_notify: extern fn (*const Ip6ConfigProtocol, Ip6ConfigDataType, Event) Status,
 
-    pub fn setData(self: *const Ip6ConfigProtocol, data_type: Ip6ConfigDataType, data_size: usize, data: *const c_void) usize {
+    pub fn setData(self: *const Ip6ConfigProtocol, data_type: Ip6ConfigDataType, data_size: usize, data: *const c_void) Status {
         return self._set_data(self, data_type, data_size, data);
     }
 
-    pub fn getData(self: *const Ip6ConfigProtocol, data_type: Ip6ConfigDataType, data_size: *usize, data: ?*const c_void) usize {
+    pub fn getData(self: *const Ip6ConfigProtocol, data_type: Ip6ConfigDataType, data_size: *usize, data: ?*const c_void) Status {
         return self._get_data(self, data_type, data_size, data);
     }
 
-    pub fn registerDataNotify(self: *const Ip6ConfigProtocol, data_type: Ip6ConfigDataType, event: Event) usize {
+    pub fn registerDataNotify(self: *const Ip6ConfigProtocol, data_type: Ip6ConfigDataType, event: Event) Status {
         return self._register_data_notify(self, data_type, event);
     }
 
-    pub fn unregisterDataNotify(self: *const Ip6ConfigProtocol, data_type: Ip6ConfigDataType, event: Event) usize {
+    pub fn unregisterDataNotify(self: *const Ip6ConfigProtocol, data_type: Ip6ConfigDataType, event: Event) Status {
         return self._unregister_data_notify(self, data_type, event);
     }
 
diff --git a/lib/std/os/uefi/protocols/ip6_protocol.zig b/lib/std/os/uefi/protocols/ip6_protocol.zig
index a412dc3c7b..f9a5c23d3c 100644
--- a/lib/std/os/uefi/protocols/ip6_protocol.zig
+++ b/lib/std/os/uefi/protocols/ip6_protocol.zig
@@ -1,63 +1,64 @@
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const Event = uefi.Event;
+const Status = uefi.Status;
 const MacAddress = uefi.protocols.MacAddress;
 const ManagedNetworkConfigData = uefi.protocols.ManagedNetworkConfigData;
 const SimpleNetworkMode = uefi.protocols.SimpleNetworkMode;
 
 pub const Ip6Protocol = extern struct {
-    _get_mode_data: extern fn (*const Ip6Protocol, ?*Ip6ModeData, ?*ManagedNetworkConfigData, ?*SimpleNetworkMode) usize,
-    _configure: extern fn (*const Ip6Protocol, ?*const Ip6ConfigData) usize,
-    _groups: extern fn (*const Ip6Protocol, bool, ?*const Ip6Address) usize,
-    _routes: extern fn (*const Ip6Protocol, bool, ?*const Ip6Address, u8, ?*const Ip6Address) usize,
-    _neighbors: extern fn (*const Ip6Protocol, bool, *const Ip6Address, ?*const MacAddress, u32, bool) usize,
-    _transmit: extern fn (*const Ip6Protocol, *Ip6CompletionToken) usize,
-    _receive: extern fn (*const Ip6Protocol, *Ip6CompletionToken) usize,
-    _cancel: extern fn (*const Ip6Protocol, ?*Ip6CompletionToken) usize,
-    _poll: extern fn (*const Ip6Protocol) usize,
+    _get_mode_data: extern fn (*const Ip6Protocol, ?*Ip6ModeData, ?*ManagedNetworkConfigData, ?*SimpleNetworkMode) Status,
+    _configure: extern fn (*const Ip6Protocol, ?*const Ip6ConfigData) Status,
+    _groups: extern fn (*const Ip6Protocol, bool, ?*const Ip6Address) Status,
+    _routes: extern fn (*const Ip6Protocol, bool, ?*const Ip6Address, u8, ?*const Ip6Address) Status,
+    _neighbors: extern fn (*const Ip6Protocol, bool, *const Ip6Address, ?*const MacAddress, u32, bool) Status,
+    _transmit: extern fn (*const Ip6Protocol, *Ip6CompletionToken) Status,
+    _receive: extern fn (*const Ip6Protocol, *Ip6CompletionToken) Status,
+    _cancel: extern fn (*const Ip6Protocol, ?*Ip6CompletionToken) Status,
+    _poll: extern fn (*const Ip6Protocol) Status,
 
     /// Gets the current operational settings for this instance of the EFI IPv6 Protocol driver.
-    pub fn getModeData(self: *const Ip6Protocol, ip6_mode_data: ?*Ip6ModeData, mnp_config_data: ?*ManagedNetworkConfigData, snp_mode_data: ?*SimpleNetworkMode) usize {
+    pub fn getModeData(self: *const Ip6Protocol, ip6_mode_data: ?*Ip6ModeData, mnp_config_data: ?*ManagedNetworkConfigData, snp_mode_data: ?*SimpleNetworkMode) Status {
         return self._get_mode_data(self, ip6_mode_data, mnp_config_data, snp_mode_data);
     }
 
     /// Assign IPv6 address and other configuration parameter to this EFI IPv6 Protocol driver instance.
-    pub fn configure(self: *const Ip6Protocol, ip6_config_data: ?*const Ip6ConfigData) usize {
+    pub fn configure(self: *const Ip6Protocol, ip6_config_data: ?*const Ip6ConfigData) Status {
         return self._configure(self, ip6_config_data);
     }
 
     /// Joins and leaves multicast groups.
-    pub fn groups(self: *const Ip6Protocol, join_flag: bool, group_address: ?*const Ip6Address) usize {
+    pub fn groups(self: *const Ip6Protocol, join_flag: bool, group_address: ?*const Ip6Address) Status {
         return self._groups(self, join_flag, group_address);
     }
 
     /// Adds and deletes routing table entries.
-    pub fn routes(self: *const Ip6Protocol, delete_route: bool, destination: ?*const Ip6Address, prefix_length: u8, gateway_address: ?*const Ip6Address) usize {
+    pub fn routes(self: *const Ip6Protocol, delete_route: bool, destination: ?*const Ip6Address, prefix_length: u8, gateway_address: ?*const Ip6Address) Status {
         return self._routes(self, delete_route, destination, prefix_length, gateway_address);
     }
 
     /// Add or delete Neighbor cache entries.
-    pub fn neighbors(self: *const Ip6Protocol, delete_flag: bool, target_ip6_address: *const Ip6Address, target_link_address: ?*const MacAddress, timeout: u32, override: bool) usize {
+    pub fn neighbors(self: *const Ip6Protocol, delete_flag: bool, target_ip6_address: *const Ip6Address, target_link_address: ?*const MacAddress, timeout: u32, override: bool) Status {
         return self._neighbors(self, delete_flag, target_ip6_address, target_link_address, timeout, override);
     }
 
     /// Places outgoing data packets into the transmit queue.
-    pub fn transmit(self: *const Ip6Protocol, token: *Ip6CompletionToken) usize {
+    pub fn transmit(self: *const Ip6Protocol, token: *Ip6CompletionToken) Status {
         return self._transmit(self, token);
     }
 
     /// Places a receiving request into the receiving queue.
-    pub fn receive(self: *const Ip6Protocol, token: *Ip6CompletionToken) usize {
+    pub fn receive(self: *const Ip6Protocol, token: *Ip6CompletionToken) Status {
         return self._receive(self, token);
     }
 
     /// Abort an asynchronous transmits or receive request.
-    pub fn cancel(self: *const Ip6Protocol, token: ?*Ip6CompletionToken) usize {
+    pub fn cancel(self: *const Ip6Protocol, token: ?*Ip6CompletionToken) Status {
         return self._cancel(self, token);
     }
 
     /// Polls for incoming data packets and processes outgoing data packets.
-    pub fn poll(self: *const Ip6Protocol) usize {
+    pub fn poll(self: *const Ip6Protocol) Status {
         return self._poll(self);
     }
 
@@ -138,6 +139,6 @@ pub const Ip6IcmpType = extern struct {
 
 pub const Ip6CompletionToken = extern struct {
     event: Event,
-    status: usize,
+    status: Status,
     packet: *c_void, // union TODO
 };
diff --git a/lib/std/os/uefi/protocols/ip6_service_binding_protocol.zig b/lib/std/os/uefi/protocols/ip6_service_binding_protocol.zig
index 9ecbb29607..030ae5cae2 100644
--- a/lib/std/os/uefi/protocols/ip6_service_binding_protocol.zig
+++ b/lib/std/os/uefi/protocols/ip6_service_binding_protocol.zig
@@ -1,16 +1,17 @@
 const uefi = @import("std").os.uefi;
 const Handle = uefi.Handle;
 const Guid = uefi.Guid;
+const Status = uefi.Status;
 
 pub const Ip6ServiceBindingProtocol = extern struct {
-    _create_child: extern fn (*const Ip6ServiceBindingProtocol, *?Handle) usize,
-    _destroy_child: extern fn (*const Ip6ServiceBindingProtocol, Handle) usize,
+    _create_child: extern fn (*const Ip6ServiceBindingProtocol, *?Handle) Status,
+    _destroy_child: extern fn (*const Ip6ServiceBindingProtocol, Handle) Status,
 
-    pub fn createChild(self: *const Ip6ServiceBindingProtocol, handle: *?Handle) usize {
+    pub fn createChild(self: *const Ip6ServiceBindingProtocol, handle: *?Handle) Status {
         return self._create_child(self, handle);
     }
 
-    pub fn destroyChild(self: *const Ip6ServiceBindingProtocol, handle: Handle) usize {
+    pub fn destroyChild(self: *const Ip6ServiceBindingProtocol, handle: Handle) Status {
         return self._destroy_child(self, handle);
     }
 
diff --git a/lib/std/os/uefi/protocols/loaded_image_protocol.zig b/lib/std/os/uefi/protocols/loaded_image_protocol.zig
index b7b281e249..cff2bdccc0 100644
--- a/lib/std/os/uefi/protocols/loaded_image_protocol.zig
+++ b/lib/std/os/uefi/protocols/loaded_image_protocol.zig
@@ -1,6 +1,7 @@
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const Handle = uefi.Handle;
+const Status = uefi.Status;
 const SystemTable = uefi.tables.SystemTable;
 const MemoryType = uefi.tables.MemoryType;
 const DevicePathProtocol = uefi.protocols.DevicePathProtocol;
@@ -13,15 +14,15 @@ pub const LoadedImageProtocol = extern struct {
     file_path: *DevicePathProtocol,
     reserved: *c_void,
     load_options_size: u32,
-    load_options: *c_void,
+    load_options: ?*c_void,
     image_base: [*]u8,
     image_size: u64,
     image_code_type: MemoryType,
     image_data_type: MemoryType,
-    _unload: extern fn (*const LoadedImageProtocol, Handle) usize,
+    _unload: extern fn (*const LoadedImageProtocol, Handle) Status,
 
     /// Unloads an image from memory.
-    pub fn unload(self: *const LoadedImageProtocol, handle: Handle) usize {
+    pub fn unload(self: *const LoadedImageProtocol, handle: Handle) Status {
         return self._unload(self, handle);
     }
 
@@ -34,3 +35,12 @@ pub const LoadedImageProtocol = extern struct {
         .node = [_]u8{ 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b },
     };
 };
+
+pub const loaded_image_device_path_protocol_guid align(8) = Guid{
+    .time_low = 0xbc62157e,
+    .time_mid = 0x3e33,
+    .time_high_and_version = 0x4fec,
+    .clock_seq_high_and_reserved = 0x99,
+    .clock_seq_low = 0x20,
+    .node = [_]u8{ 0x2d, 0x3b, 0x36, 0xd7, 0x50, 0xdf },
+};
diff --git a/lib/std/os/uefi/protocols/managed_network_protocol.zig b/lib/std/os/uefi/protocols/managed_network_protocol.zig
index a2cf6e2eca..60dc6996ad 100644
--- a/lib/std/os/uefi/protocols/managed_network_protocol.zig
+++ b/lib/std/os/uefi/protocols/managed_network_protocol.zig
@@ -1,60 +1,61 @@
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const Event = uefi.Event;
+const Status = uefi.Status;
 const Time = uefi.Time;
 const SimpleNetworkMode = uefi.protocols.SimpleNetworkMode;
 const MacAddress = uefi.protocols.MacAddress;
 
 pub const ManagedNetworkProtocol = extern struct {
-    _get_mode_data: extern fn (*const ManagedNetworkProtocol, ?*ManagedNetworkConfigData, ?*SimpleNetworkMode) usize,
-    _configure: extern fn (*const ManagedNetworkProtocol, ?*const ManagedNetworkConfigData) usize,
-    _mcast_ip_to_mac: extern fn (*const ManagedNetworkProtocol, bool, *const c_void, *MacAddress) usize,
-    _groups: extern fn (*const ManagedNetworkProtocol, bool, ?*const MacAddress) usize,
-    _transmit: extern fn (*const ManagedNetworkProtocol, *const ManagedNetworkCompletionToken) usize,
-    _receive: extern fn (*const ManagedNetworkProtocol, *const ManagedNetworkCompletionToken) usize,
-    _cancel: extern fn (*const ManagedNetworkProtocol, ?*const ManagedNetworkCompletionToken) usize,
+    _get_mode_data: extern fn (*const ManagedNetworkProtocol, ?*ManagedNetworkConfigData, ?*SimpleNetworkMode) Status,
+    _configure: extern fn (*const ManagedNetworkProtocol, ?*const ManagedNetworkConfigData) Status,
+    _mcast_ip_to_mac: extern fn (*const ManagedNetworkProtocol, bool, *const c_void, *MacAddress) Status,
+    _groups: extern fn (*const ManagedNetworkProtocol, bool, ?*const MacAddress) Status,
+    _transmit: extern fn (*const ManagedNetworkProtocol, *const ManagedNetworkCompletionToken) Status,
+    _receive: extern fn (*const ManagedNetworkProtocol, *const ManagedNetworkCompletionToken) Status,
+    _cancel: extern fn (*const ManagedNetworkProtocol, ?*const ManagedNetworkCompletionToken) Status,
     _poll: extern fn (*const ManagedNetworkProtocol) usize,
 
     /// Returns the operational parameters for the current MNP child driver.
     /// May also support returning the underlying SNP driver mode data.
-    pub fn getModeData(self: *const ManagedNetworkProtocol, mnp_config_data: ?*ManagedNetworkConfigData, snp_mode_data: ?*SimpleNetworkMode) usize {
+    pub fn getModeData(self: *const ManagedNetworkProtocol, mnp_config_data: ?*ManagedNetworkConfigData, snp_mode_data: ?*SimpleNetworkMode) Status {
         return self._get_mode_data(self, mnp_config_data, snp_mode_data);
     }
 
     /// Sets or clears the operational parameters for the MNP child driver.
-    pub fn configure(self: *const ManagedNetworkProtocol, mnp_config_data: ?*const ManagedNetworkConfigData) usize {
+    pub fn configure(self: *const ManagedNetworkProtocol, mnp_config_data: ?*const ManagedNetworkConfigData) Status {
         return self._configure(self, mnp_config_data);
     }
 
     /// Translates an IP multicast address to a hardware (MAC) multicast address.
     /// This function may be unsupported in some MNP implementations.
-    pub fn mcastIpToMac(self: *const ManagedNetworkProtocol, ipv6flag: bool, ipaddress: *const c_void, mac_address: *MacAddress) usize {
+    pub fn mcastIpToMac(self: *const ManagedNetworkProtocol, ipv6flag: bool, ipaddress: *const c_void, mac_address: *MacAddress) Status {
         return self._mcast_ip_to_mac(self, ipv6flag, ipaddress);
     }
 
     /// Enables and disables receive filters for multicast address.
     /// This function may be unsupported in some MNP implementations.
-    pub fn groups(self: *const ManagedNetworkProtocol, join_flag: bool, mac_address: ?*const MacAddress) usiz {
+    pub fn groups(self: *const ManagedNetworkProtocol, join_flag: bool, mac_address: ?*const MacAddress) Status {
         return self._groups(self, join_flag, mac_address);
     }
 
     /// Places asynchronous outgoing data packets into the transmit queue.
-    pub fn transmit(self: *const ManagedNetworkProtocol, token: *const ManagedNetworkCompletionToken) usize {
+    pub fn transmit(self: *const ManagedNetworkProtocol, token: *const ManagedNetworkCompletionToken) Status {
         return self._transmit(self, token);
     }
 
     /// Places an asynchronous receiving request into the receiving queue.
-    pub fn receive(self: *const ManagedNetworkProtocol, token: *const ManagedNetworkCompletionToken) usize {
+    pub fn receive(self: *const ManagedNetworkProtocol, token: *const ManagedNetworkCompletionToken) Status {
         return self._receive(self, token);
     }
 
     /// Aborts an asynchronous transmit or receive request.
-    pub fn cancel(self: *const ManagedNetworkProtocol, token: ?*const ManagedNetworkCompletionToken) usize {
+    pub fn cancel(self: *const ManagedNetworkProtocol, token: ?*const ManagedNetworkCompletionToken) Status {
         return self._cancel(self, token);
     }
 
     /// Polls for incoming data packets and processes outgoing data packets.
-    pub fn poll(self: *const ManagedNetworkProtocol) usize {
+    pub fn poll(self: *const ManagedNetworkProtocol) Status {
         return self._poll(self);
     }
 
@@ -83,7 +84,7 @@ pub const ManagedNetworkConfigData = extern struct {
 
 pub const ManagedNetworkCompletionToken = extern struct {
     event: Event,
-    status: usize,
+    status: Status,
     packet: extern union {
         RxData: *ManagedNetworkReceiveData,
         TxData: *ManagedNetworkTransmitData,
diff --git a/lib/std/os/uefi/protocols/managed_network_service_binding_protocol.zig b/lib/std/os/uefi/protocols/managed_network_service_binding_protocol.zig
index 492fe450ba..ea8bd470c3 100644
--- a/lib/std/os/uefi/protocols/managed_network_service_binding_protocol.zig
+++ b/lib/std/os/uefi/protocols/managed_network_service_binding_protocol.zig
@@ -1,16 +1,17 @@
 const uefi = @import("std").os.uefi;
 const Handle = uefi.Handle;
 const Guid = uefi.Guid;
+const Status = uefi.Status;
 
 pub const ManagedNetworkServiceBindingProtocol = extern struct {
-    _create_child: extern fn (*const ManagedNetworkServiceBindingProtocol, *?Handle) usize,
-    _destroy_child: extern fn (*const ManagedNetworkServiceBindingProtocol, Handle) usize,
+    _create_child: extern fn (*const ManagedNetworkServiceBindingProtocol, *?Handle) Status,
+    _destroy_child: extern fn (*const ManagedNetworkServiceBindingProtocol, Handle) Status,
 
-    pub fn createChild(self: *const ManagedNetworkServiceBindingProtocol, handle: *?Handle) usize {
+    pub fn createChild(self: *const ManagedNetworkServiceBindingProtocol, handle: *?Handle) Status {
         return self._create_child(self, handle);
     }
 
-    pub fn destroyChild(self: *const ManagedNetworkServiceBindingProtocol, handle: Handle) usize {
+    pub fn destroyChild(self: *const ManagedNetworkServiceBindingProtocol, handle: Handle) Status {
         return self._destroy_child(self, handle);
     }
 
diff --git a/lib/std/os/uefi/protocols/rng_protocol.zig b/lib/std/os/uefi/protocols/rng_protocol.zig
index 65eb882afb..4d5dd496af 100644
--- a/lib/std/os/uefi/protocols/rng_protocol.zig
+++ b/lib/std/os/uefi/protocols/rng_protocol.zig
@@ -1,18 +1,19 @@
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
+const Status = uefi.Status;
 
 /// Random Number Generator protocol
 pub const RNGProtocol = extern struct {
-    _get_info: extern fn (*const RNGProtocol, *usize, [*]align(8) Guid) usize,
-    _get_rng: extern fn (*const RNGProtocol, ?*align(8) const Guid, usize, [*]u8) usize,
+    _get_info: extern fn (*const RNGProtocol, *usize, [*]align(8) Guid) Status,
+    _get_rng: extern fn (*const RNGProtocol, ?*align(8) const Guid, usize, [*]u8) Status,
 
     /// Returns information about the random number generation implementation.
-    pub fn getInfo(self: *const RNGProtocol, list_size: *usize, list: [*]align(8) Guid) usize {
+    pub fn getInfo(self: *const RNGProtocol, list_size: *usize, list: [*]align(8) Guid) Status {
         return self._get_info(self, list_size, list);
     }
 
     /// Produces and returns an RNG value using either the default or specified RNG algorithm.
-    pub fn getRNG(self: *const RNGProtocol, algo: ?*align(8) const Guid, value_length: usize, value: [*]u8) usize {
+    pub fn getRNG(self: *const RNGProtocol, algo: ?*align(8) const Guid, value_length: usize, value: [*]u8) Status {
         return self._get_rng(self, algo, value_length, value);
     }
 
diff --git a/lib/std/os/uefi/protocols/shell_parameters_protocol.zig b/lib/std/os/uefi/protocols/shell_parameters_protocol.zig
new file mode 100644
index 0000000000..afbd26e939
--- /dev/null
+++ b/lib/std/os/uefi/protocols/shell_parameters_protocol.zig
@@ -0,0 +1,20 @@
+const uefi = @import("std").os.uefi;
+const Guid = uefi.Guid;
+const FileHandle = uefi.FileHandle;
+
+pub const ShellParametersProtocol = extern struct {
+    argv: [*][*:0]const u16,
+    argc: usize,
+    stdin: FileHandle,
+    stdout: FileHandle,
+    stderr: FileHandle,
+
+    pub const guid align(8) = Guid{
+        .time_low = 0x752f3136,
+        .time_mid = 0x4e16,
+        .time_high_and_version = 0x4fdc,
+        .clock_seq_high_and_reserved = 0xa2,
+        .clock_seq_low = 0x2a,
+        .node = [_]u8{ 0xe5, 0xf4, 0x68, 0x12, 0xf4, 0xca },
+    };
+};
diff --git a/lib/std/os/uefi/protocols/simple_file_system_protocol.zig b/lib/std/os/uefi/protocols/simple_file_system_protocol.zig
new file mode 100644
index 0000000000..31da02595a
--- /dev/null
+++ b/lib/std/os/uefi/protocols/simple_file_system_protocol.zig
@@ -0,0 +1,22 @@
+const uefi = @import("std").os.uefi;
+const Guid = uefi.Guid;
+const FileProtocol = uefi.protocols.FileProtocol;
+const Status = uefi.Status;
+
+pub const SimpleFileSystemProtocol = extern struct {
+    revision: u64,
+    _open_volume: extern fn (*const SimpleFileSystemProtocol, **const FileProtocol) Status,
+
+    pub fn openVolume(self: *const SimpleFileSystemProtocol, root: **const FileProtocol) Status {
+        return self._open_volume(self, root);
+    }
+
+    pub const guid align(8) = Guid{
+        .time_low = 0x0964e5b22,
+        .time_mid = 0x6459,
+        .time_high_and_version = 0x11d2,
+        .clock_seq_high_and_reserved = 0x8e,
+        .clock_seq_low = 0x39,
+        .node = [_]u8{ 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b },
+    };
+};
diff --git a/lib/std/os/uefi/protocols/simple_network_protocol.zig b/lib/std/os/uefi/protocols/simple_network_protocol.zig
index f5e62734b6..a0d85b06d1 100644
--- a/lib/std/os/uefi/protocols/simple_network_protocol.zig
+++ b/lib/std/os/uefi/protocols/simple_network_protocol.zig
@@ -1,87 +1,88 @@
 const uefi = @import("std").os.uefi;
 const Event = uefi.Event;
 const Guid = uefi.Guid;
+const Status = uefi.Status;
 
 pub const SimpleNetworkProtocol = extern struct {
     revision: u64,
-    _start: extern fn (*const SimpleNetworkProtocol) usize,
-    _stop: extern fn (*const SimpleNetworkProtocol) usize,
-    _initialize: extern fn (*const SimpleNetworkProtocol, usize, usize) usize,
-    _reset: extern fn (*const SimpleNetworkProtocol, bool) usize,
-    _shutdown: extern fn (*const SimpleNetworkProtocol) usize,
-    _receive_filters: extern fn (*const SimpleNetworkProtocol, SimpleNetworkReceiveFilter, SimpleNetworkReceiveFilter, bool, usize, ?[*]const MacAddress) usize,
-    _station_address: extern fn (*const SimpleNetworkProtocol, bool, ?*const MacAddress) usize,
-    _statistics: extern fn (*const SimpleNetworkProtocol, bool, ?*usize, ?*NetworkStatistics) usize,
-    _mcast_ip_to_mac: extern fn (*const SimpleNetworkProtocol, bool, *const c_void, *MacAddress) usize,
-    _nvdata: extern fn (*const SimpleNetworkProtocol, bool, usize, usize, [*]u8) usize,
-    _get_status: extern fn (*const SimpleNetworkProtocol, *SimpleNetworkInterruptStatus, ?*?[*]u8) usize,
-    _transmit: extern fn (*const SimpleNetworkProtocol, usize, usize, [*]const u8, ?*const MacAddress, ?*const MacAddress, ?*const u16) usize,
-    _receive: extern fn (*const SimpleNetworkProtocol, ?*usize, *usize, [*]u8, ?*MacAddress, ?*MacAddress, ?*u16) usize,
+    _start: extern fn (*const SimpleNetworkProtocol) Status,
+    _stop: extern fn (*const SimpleNetworkProtocol) Status,
+    _initialize: extern fn (*const SimpleNetworkProtocol, usize, usize) Status,
+    _reset: extern fn (*const SimpleNetworkProtocol, bool) Status,
+    _shutdown: extern fn (*const SimpleNetworkProtocol) Status,
+    _receive_filters: extern fn (*const SimpleNetworkProtocol, SimpleNetworkReceiveFilter, SimpleNetworkReceiveFilter, bool, usize, ?[*]const MacAddress) Status,
+    _station_address: extern fn (*const SimpleNetworkProtocol, bool, ?*const MacAddress) Status,
+    _statistics: extern fn (*const SimpleNetworkProtocol, bool, ?*usize, ?*NetworkStatistics) Status,
+    _mcast_ip_to_mac: extern fn (*const SimpleNetworkProtocol, bool, *const c_void, *MacAddress) Status,
+    _nvdata: extern fn (*const SimpleNetworkProtocol, bool, usize, usize, [*]u8) Status,
+    _get_status: extern fn (*const SimpleNetworkProtocol, *SimpleNetworkInterruptStatus, ?*?[*]u8) Status,
+    _transmit: extern fn (*const SimpleNetworkProtocol, usize, usize, [*]const u8, ?*const MacAddress, ?*const MacAddress, ?*const u16) Status,
+    _receive: extern fn (*const SimpleNetworkProtocol, ?*usize, *usize, [*]u8, ?*MacAddress, ?*MacAddress, ?*u16) Status,
     wait_for_packet: Event,
     mode: *SimpleNetworkMode,
 
     /// Changes the state of a network interface from "stopped" to "started".
-    pub fn start(self: *const SimpleNetworkProtocol) usize {
+    pub fn start(self: *const SimpleNetworkProtocol) Status {
         return self._start(self);
     }
 
     /// Changes the state of a network interface from "started" to "stopped".
-    pub fn stop(self: *const SimpleNetworkProtocol) usize {
+    pub fn stop(self: *const SimpleNetworkProtocol) Status {
         return self._stop(self);
     }
 
     /// Resets a network adapter and allocates the transmit and receive buffers required by the network interface.
-    pub fn initialize(self: *const SimpleNetworkProtocol, extra_rx_buffer_size: usize, extra_tx_buffer_size: usize) usize {
+    pub fn initialize(self: *const SimpleNetworkProtocol, extra_rx_buffer_size: usize, extra_tx_buffer_size: usize) Status {
         return self._initialize(self, extra_rx_buffer_size, extra_tx_buffer_size);
     }
 
     /// Resets a network adapter and reinitializes it with the parameters that were provided in the previous call to initialize().
-    pub fn reset(self: *const SimpleNetworkProtocol, extended_verification: bool) usize {
+    pub fn reset(self: *const SimpleNetworkProtocol, extended_verification: bool) Status {
         return self._reset(self, extended_verification);
     }
 
     /// Resets a network adapter and leaves it in a state that is safe for another driver to initialize.
-    pub fn shutdown(self: *const SimpleNetworkProtocol) usize {
+    pub fn shutdown(self: *const SimpleNetworkProtocol) Status {
         return self._shutdown(self);
     }
 
     /// Manages the multicast receive filters of a network interface.
-    pub fn receiveFilters(self: *const SimpleNetworkProtocol, enable: SimpleNetworkReceiveFilter, disable: SimpleNetworkReceiveFilter, reset_mcast_filter: bool, mcast_filter_cnt: usize, mcast_filter: ?[*]const MacAddress) usize {
+    pub fn receiveFilters(self: *const SimpleNetworkProtocol, enable: SimpleNetworkReceiveFilter, disable: SimpleNetworkReceiveFilter, reset_mcast_filter: bool, mcast_filter_cnt: usize, mcast_filter: ?[*]const MacAddress) Status {
         return self._receive_filters(self, enable, disable, reset_mcast_filter, mcast_filter_cnt, mcast_filter);
     }
 
     /// Modifies or resets the current station address, if supported.
-    pub fn stationAddress(self: *const SimpleNetworkProtocol, reset: bool, new: ?*const MacAddress) usize {
+    pub fn stationAddress(self: *const SimpleNetworkProtocol, reset: bool, new: ?*const MacAddress) Status {
         return self._station_address(self, reset, new);
     }
 
     /// Resets or collects the statistics on a network interface.
-    pub fn statistics(self: *const SimpleNetworkProtocol, reset_: bool, statistics_size: ?*usize, statistics_table: ?*NetworkStatistics) usize {
+    pub fn statistics(self: *const SimpleNetworkProtocol, reset_: bool, statistics_size: ?*usize, statistics_table: ?*NetworkStatistics) Status {
         return self._statistics(self, reset_, statistics_size, statistics_table);
     }
 
     /// Converts a multicast IP address to a multicast HW MAC address.
-    pub fn mcastIpToMac(self: *const SimpleNetworkProtocol, ipv6: bool, ip: *const c_void, mac: *MacAddress) usize {
+    pub fn mcastIpToMac(self: *const SimpleNetworkProtocol, ipv6: bool, ip: *const c_void, mac: *MacAddress) Status {
         return self._mcast_ip_to_mac(self, ipv6, ip, mac);
     }
 
     /// Performs read and write operations on the NVRAM device attached to a network interface.
-    pub fn nvdata(self: *const SimpleNetworkProtocol, read_write: bool, offset: usize, buffer_size: usize, buffer: [*]u8) usize {
+    pub fn nvdata(self: *const SimpleNetworkProtocol, read_write: bool, offset: usize, buffer_size: usize, buffer: [*]u8) Status {
         return self._nvdata(self, read_write, offset, buffer_size, buffer);
     }
 
     /// Reads the current interrupt status and recycled transmit buffer status from a network interface.
-    pub fn getStatus(self: *const SimpleNetworkProtocol, interrupt_status: *SimpleNetworkInterruptStatus, tx_buf: ?*?[*]u8) usize {
+    pub fn getStatus(self: *const SimpleNetworkProtocol, interrupt_status: *SimpleNetworkInterruptStatus, tx_buf: ?*?[*]u8) Status {
         return self._get_status(self, interrupt_status, tx_buf);
     }
 
     /// Places a packet in the transmit queue of a network interface.
-    pub fn transmit(self: *const SimpleNetworkProtocol, header_size: usize, buffer_size: usize, buffer: [*]const u8, src_addr: ?*const MacAddress, dest_addr: ?*const MacAddress, protocol: ?*const u16) usize {
+    pub fn transmit(self: *const SimpleNetworkProtocol, header_size: usize, buffer_size: usize, buffer: [*]const u8, src_addr: ?*const MacAddress, dest_addr: ?*const MacAddress, protocol: ?*const u16) Status {
         return self._transmit(self, header_size, buffer_size, buffer, src_addr, dest_addr, protocol);
     }
 
     /// Receives a packet from a network interface.
-    pub fn receive(self: *const SimpleNetworkProtocol, header_size: ?*usize, buffer_size: *usize, buffer: [*]u8, src_addr: ?*MacAddress, dest_addr: ?*MacAddress, protocol: ?*u16) usize {
+    pub fn receive(self: *const SimpleNetworkProtocol, header_size: ?*usize, buffer_size: *usize, buffer: [*]u8, src_addr: ?*MacAddress, dest_addr: ?*MacAddress, protocol: ?*u16) Status {
         return self._receive(self, header_size, buffer_size, buffer, src_addr, dest_addr, protocol);
     }
 
diff --git a/lib/std/os/uefi/protocols/simple_pointer_protocol.zig b/lib/std/os/uefi/protocols/simple_pointer_protocol.zig
index e0cb4ba354..2d1c7d4504 100644
--- a/lib/std/os/uefi/protocols/simple_pointer_protocol.zig
+++ b/lib/std/os/uefi/protocols/simple_pointer_protocol.zig
@@ -1,21 +1,22 @@
 const uefi = @import("std").os.uefi;
 const Event = uefi.Event;
 const Guid = uefi.Guid;
+const Status = uefi.Status;
 
 /// Protocol for mice
 pub const SimplePointerProtocol = struct {
-    _reset: extern fn (*const SimplePointerProtocol, bool) usize,
-    _get_state: extern fn (*const SimplePointerProtocol, *SimplePointerState) usize,
+    _reset: extern fn (*const SimplePointerProtocol, bool) Status,
+    _get_state: extern fn (*const SimplePointerProtocol, *SimplePointerState) Status,
     wait_for_input: Event,
     mode: *SimplePointerMode,
 
     /// Resets the pointer device hardware.
-    pub fn reset(self: *const SimplePointerProtocol, verify: bool) usize {
+    pub fn reset(self: *const SimplePointerProtocol, verify: bool) Status {
         return self._reset(self, verify);
     }
 
     /// Retrieves the current state of a pointer device.
-    pub fn getState(self: *const SimplePointerProtocol, state: *SimplePointerState) usize {
+    pub fn getState(self: *const SimplePointerProtocol, state: *SimplePointerState) Status {
         return self._get_state(self, state);
     }
 
diff --git a/lib/std/os/uefi/protocols/simple_text_input_ex_protocol.zig b/lib/std/os/uefi/protocols/simple_text_input_ex_protocol.zig
index e2c4be7847..c361ffa9a1 100644
--- a/lib/std/os/uefi/protocols/simple_text_input_ex_protocol.zig
+++ b/lib/std/os/uefi/protocols/simple_text_input_ex_protocol.zig
@@ -1,38 +1,39 @@
 const uefi = @import("std").os.uefi;
 const Event = uefi.Event;
 const Guid = uefi.Guid;
+const Status = uefi.Status;
 
 /// Character input devices, e.g. Keyboard
 pub const SimpleTextInputExProtocol = extern struct {
-    _reset: extern fn (*const SimpleTextInputExProtocol, bool) usize,
-    _read_key_stroke_ex: extern fn (*const SimpleTextInputExProtocol, *KeyData) usize,
+    _reset: extern fn (*const SimpleTextInputExProtocol, bool) Status,
+    _read_key_stroke_ex: extern fn (*const SimpleTextInputExProtocol, *KeyData) Status,
     wait_for_key_ex: Event,
-    _set_state: extern fn (*const SimpleTextInputExProtocol, *const u8) usize,
-    _register_key_notify: extern fn (*const SimpleTextInputExProtocol, *const KeyData, extern fn (*const KeyData) usize, **c_void) usize,
-    _unregister_key_notify: extern fn (*const SimpleTextInputExProtocol, *const c_void) usize,
+    _set_state: extern fn (*const SimpleTextInputExProtocol, *const u8) Status,
+    _register_key_notify: extern fn (*const SimpleTextInputExProtocol, *const KeyData, extern fn (*const KeyData) usize, **c_void) Status,
+    _unregister_key_notify: extern fn (*const SimpleTextInputExProtocol, *const c_void) Status,
 
     /// Resets the input device hardware.
-    pub fn reset(self: *const SimpleTextInputExProtocol, verify: bool) usize {
+    pub fn reset(self: *const SimpleTextInputExProtocol, verify: bool) Status {
         return self._reset(self, verify);
     }
 
     /// Reads the next keystroke from the input device.
-    pub fn readKeyStrokeEx(self: *const SimpleTextInputExProtocol, key_data: *KeyData) usize {
+    pub fn readKeyStrokeEx(self: *const SimpleTextInputExProtocol, key_data: *KeyData) Status {
         return self._read_key_stroke_ex(self, key_data);
     }
 
     /// Set certain state for the input device.
-    pub fn setState(self: *const SimpleTextInputExProtocol, state: *const u8) usize {
+    pub fn setState(self: *const SimpleTextInputExProtocol, state: *const u8) Status {
         return self._set_state(self, state);
     }
 
     /// Register a notification function for a particular keystroke for the input device.
-    pub fn registerKeyNotify(self: *const SimpleTextInputExProtocol, key_data: *const KeyData, notify: extern fn (*const KeyData) usize, handle: **c_void) usize {
+    pub fn registerKeyNotify(self: *const SimpleTextInputExProtocol, key_data: *const KeyData, notify: extern fn (*const KeyData) usize, handle: **c_void) Status {
         return self._register_key_notify(self, key_data, notify, handle);
     }
 
     /// Remove the notification that was previously registered.
-    pub fn unregisterKeyNotify(self: *const SimpleTextInputExProtocol, handle: *const c_void) usize {
+    pub fn unregisterKeyNotify(self: *const SimpleTextInputExProtocol, handle: *const c_void) Status {
         return self._unregister_key_notify(self, handle);
     }
 
diff --git a/lib/std/os/uefi/protocols/simple_text_input_protocol.zig b/lib/std/os/uefi/protocols/simple_text_input_protocol.zig
index b56ff728ef..fdae001145 100644
--- a/lib/std/os/uefi/protocols/simple_text_input_protocol.zig
+++ b/lib/std/os/uefi/protocols/simple_text_input_protocol.zig
@@ -1,20 +1,22 @@
 const uefi = @import("std").os.uefi;
 const Event = uefi.Event;
 const Guid = uefi.Guid;
+const InputKey = uefi.protocols.InputKey;
+const Status = uefi.Status;
 
 /// Character input devices, e.g. Keyboard
 pub const SimpleTextInputProtocol = extern struct {
     _reset: extern fn (*const SimpleTextInputProtocol, bool) usize,
-    _read_key_stroke: extern fn (*const SimpleTextInputProtocol, *uefi.protocols.InputKey) usize,
+    _read_key_stroke: extern fn (*const SimpleTextInputProtocol, *InputKey) Status,
     wait_for_key: Event,
 
     /// Resets the input device hardware.
-    pub fn reset(self: *const SimpleTextInputProtocol, verify: bool) usize {
+    pub fn reset(self: *const SimpleTextInputProtocol, verify: bool) Status {
         return self._reset(self, verify);
     }
 
     /// Reads the next keystroke from the input device.
-    pub fn readKeyStroke(self: *const SimpleTextInputProtocol, input_key: *uefi.protocols.InputKey) usize {
+    pub fn readKeyStroke(self: *const SimpleTextInputProtocol, input_key: *InputKey) Status {
         return self._read_key_stroke(self, input_key);
     }
 
diff --git a/lib/std/os/uefi/protocols/simple_text_output_protocol.zig b/lib/std/os/uefi/protocols/simple_text_output_protocol.zig
index 2a643ec834..09f3cb1cd2 100644
--- a/lib/std/os/uefi/protocols/simple_text_output_protocol.zig
+++ b/lib/std/os/uefi/protocols/simple_text_output_protocol.zig
@@ -1,61 +1,62 @@
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
+const Status = uefi.Status;
 
 /// Character output devices
 pub const SimpleTextOutputProtocol = extern struct {
-    _reset: extern fn (*const SimpleTextOutputProtocol, bool) usize,
-    _output_string: extern fn (*const SimpleTextOutputProtocol, [*:0]const u16) usize,
-    _test_string: extern fn (*const SimpleTextOutputProtocol, [*:0]const u16) usize,
-    _query_mode: extern fn (*const SimpleTextOutputProtocol, usize, *usize, *usize) usize,
-    _set_mode: extern fn (*const SimpleTextOutputProtocol, usize) usize,
-    _set_attribute: extern fn (*const SimpleTextOutputProtocol, usize) usize,
-    _clear_screen: extern fn (*const SimpleTextOutputProtocol) usize,
-    _set_cursor_position: extern fn (*const SimpleTextOutputProtocol, usize, usize) usize,
-    _enable_cursor: extern fn (*const SimpleTextOutputProtocol, bool) usize,
+    _reset: extern fn (*const SimpleTextOutputProtocol, bool) Status,
+    _output_string: extern fn (*const SimpleTextOutputProtocol, [*:0]const u16) Status,
+    _test_string: extern fn (*const SimpleTextOutputProtocol, [*:0]const u16) Status,
+    _query_mode: extern fn (*const SimpleTextOutputProtocol, usize, *usize, *usize) Status,
+    _set_mode: extern fn (*const SimpleTextOutputProtocol, usize) Status,
+    _set_attribute: extern fn (*const SimpleTextOutputProtocol, usize) Status,
+    _clear_screen: extern fn (*const SimpleTextOutputProtocol) Status,
+    _set_cursor_position: extern fn (*const SimpleTextOutputProtocol, usize, usize) Status,
+    _enable_cursor: extern fn (*const SimpleTextOutputProtocol, bool) Status,
     mode: *SimpleTextOutputMode,
 
     /// Resets the text output device hardware.
-    pub fn reset(self: *const SimpleTextOutputProtocol, verify: bool) usize {
+    pub fn reset(self: *const SimpleTextOutputProtocol, verify: bool) Status {
         return self._reset(self, verify);
     }
 
     /// Writes a string to the output device.
-    pub fn outputString(self: *const SimpleTextOutputProtocol, msg: [*:0]const u16) usize {
+    pub fn outputString(self: *const SimpleTextOutputProtocol, msg: [*:0]const u16) Status {
         return self._output_string(self, msg);
     }
 
     /// Verifies that all characters in a string can be output to the target device.
-    pub fn testString(self: *const SimpleTextOutputProtocol, msg: [*:0]const u16) usize {
+    pub fn testString(self: *const SimpleTextOutputProtocol, msg: [*:0]const u16) Status {
         return self._test_string(self, msg);
     }
 
     /// Returns information for an available text mode that the output device(s) supports.
-    pub fn queryMode(self: *const SimpleTextOutputProtocol, mode_number: usize, columns: *usize, rows: *usize) usize {
+    pub fn queryMode(self: *const SimpleTextOutputProtocol, mode_number: usize, columns: *usize, rows: *usize) Status {
         return self._query_mode(self, mode_number, columns, rows);
     }
 
     /// Sets the output device(s) to a specified mode.
-    pub fn setMode(self: *const SimpleTextOutputProtocol, mode_number: usize) usize {
+    pub fn setMode(self: *const SimpleTextOutputProtocol, mode_number: usize) Status {
         return self._set_mode(self, mode_number);
     }
 
     /// Sets the background and foreground colors for the outputString() and clearScreen() functions.
-    pub fn setAttribute(self: *const SimpleTextOutputProtocol, attribute: usize) usize {
+    pub fn setAttribute(self: *const SimpleTextOutputProtocol, attribute: usize) Status {
         return self._set_attribute(self, attribute);
     }
 
     /// Clears the output device(s) display to the currently selected background color.
-    pub fn clearScreen(self: *const SimpleTextOutputProtocol) usize {
+    pub fn clearScreen(self: *const SimpleTextOutputProtocol) Status {
         return self._clear_screen(self);
     }
 
     /// Sets the current coordinates of the cursor position.
-    pub fn setCursorPosition(self: *const SimpleTextOutputProtocol, column: usize, row: usize) usize {
+    pub fn setCursorPosition(self: *const SimpleTextOutputProtocol, column: usize, row: usize) Status {
         return self._set_cursor_position(self, column, row);
     }
 
     /// Makes the cursor visible or invisible.
-    pub fn enableCursor(self: *const SimpleTextOutputProtocol, visible: bool) usize {
+    pub fn enableCursor(self: *const SimpleTextOutputProtocol, visible: bool) Status {
         return self._enable_cursor(self, visible);
     }
 
diff --git a/lib/std/os/uefi/protocols/udp6_protocol.zig b/lib/std/os/uefi/protocols/udp6_protocol.zig
index 266f2964f9..f0ab2789f3 100644
--- a/lib/std/os/uefi/protocols/udp6_protocol.zig
+++ b/lib/std/os/uefi/protocols/udp6_protocol.zig
@@ -1,6 +1,7 @@
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const Event = uefi.Event;
+const Status = uefi.Status;
 const Time = uefi.Time;
 const Ip6ModeData = uefi.protocols.Ip6ModeData;
 const Ip6Address = uefi.protocols.Ip6Address;
@@ -8,39 +9,39 @@ const ManagedNetworkConfigData = uefi.protocols.ManagedNetworkConfigData;
 const SimpleNetworkMode = uefi.protocols.SimpleNetworkMode;
 
 pub const Udp6Protocol = extern struct {
-    _get_mode_data: extern fn (*const Udp6Protocol, ?*Udp6ConfigData, ?*Ip6ModeData, ?*ManagedNetworkConfigData, ?*SimpleNetworkMode) usize,
-    _configure: extern fn (*const Udp6Protocol, ?*const Udp6ConfigData) usize,
-    _groups: extern fn (*const Udp6Protocol, bool, ?*const Ip6Address) usize,
-    _transmit: extern fn (*const Udp6Protocol, *Udp6CompletionToken) usize,
-    _receive: extern fn (*const Udp6Protocol, *Udp6CompletionToken) usize,
-    _cancel: extern fn (*const Udp6Protocol, ?*Udp6CompletionToken) usize,
-    _poll: extern fn (*const Udp6Protocol) usize,
+    _get_mode_data: extern fn (*const Udp6Protocol, ?*Udp6ConfigData, ?*Ip6ModeData, ?*ManagedNetworkConfigData, ?*SimpleNetworkMode) Status,
+    _configure: extern fn (*const Udp6Protocol, ?*const Udp6ConfigData) Status,
+    _groups: extern fn (*const Udp6Protocol, bool, ?*const Ip6Address) Status,
+    _transmit: extern fn (*const Udp6Protocol, *Udp6CompletionToken) Status,
+    _receive: extern fn (*const Udp6Protocol, *Udp6CompletionToken) Status,
+    _cancel: extern fn (*const Udp6Protocol, ?*Udp6CompletionToken) Status,
+    _poll: extern fn (*const Udp6Protocol) Status,
 
-    pub fn getModeData(self: *const Udp6Protocol, udp6_config_data: ?*Udp6ConfigData, ip6_mode_data: ?*Ip6ModeData, mnp_config_data: ?*ManagedNetworkConfigData, snp_mode_data: ?*SimpleNetworkMode) usize {
+    pub fn getModeData(self: *const Udp6Protocol, udp6_config_data: ?*Udp6ConfigData, ip6_mode_data: ?*Ip6ModeData, mnp_config_data: ?*ManagedNetworkConfigData, snp_mode_data: ?*SimpleNetworkMode) Status {
         return self._get_mode_data(self, udp6_config_data, ip6_mode_data, mnp_config_data, snp_mode_data);
     }
 
-    pub fn configure(self: *const Udp6Protocol, udp6_config_data: ?*const Udp6ConfigData) usize {
+    pub fn configure(self: *const Udp6Protocol, udp6_config_data: ?*const Udp6ConfigData) Status {
         return self._configure(self, udp6_config_data);
     }
 
-    pub fn groups(self: *const Udp6Protocol, join_flag: bool, multicast_address: ?*const Ip6Address) usize {
+    pub fn groups(self: *const Udp6Protocol, join_flag: bool, multicast_address: ?*const Ip6Address) Status {
         return self._groups(self, join_flag, multicast_address);
     }
 
-    pub fn transmit(self: *const Udp6Protocol, token: *Udp6CompletionToken) usize {
+    pub fn transmit(self: *const Udp6Protocol, token: *Udp6CompletionToken) Status {
         return self._transmit(self, token);
     }
 
-    pub fn receive(self: *const Udp6Protocol, token: *Udp6CompletionToken) usize {
+    pub fn receive(self: *const Udp6Protocol, token: *Udp6CompletionToken) Status {
         return self._receive(self, token);
     }
 
-    pub fn cancel(self: *const Udp6Protocol, token: ?*Udp6CompletionToken) usize {
+    pub fn cancel(self: *const Udp6Protocol, token: ?*Udp6CompletionToken) Status {
         return self._cancel(self, token);
     }
 
-    pub fn poll(self: *const Udp6Protocol) usize {
+    pub fn poll(self: *const Udp6Protocol) Status {
         return self._poll(self);
     }
 
@@ -70,7 +71,7 @@ pub const Udp6ConfigData = extern struct {
 
 pub const Udp6CompletionToken = extern struct {
     event: Event,
-    status: usize,
+    Status: usize,
     packet: extern union {
         RxData: *Udp6ReceiveData,
         TxData: *Udp6TransmitData,
diff --git a/lib/std/os/uefi/protocols/udp6_service_binding_protocol.zig b/lib/std/os/uefi/protocols/udp6_service_binding_protocol.zig
index 2f499b50c6..9a7a67807c 100644
--- a/lib/std/os/uefi/protocols/udp6_service_binding_protocol.zig
+++ b/lib/std/os/uefi/protocols/udp6_service_binding_protocol.zig
@@ -1,16 +1,17 @@
 const uefi = @import("std").os.uefi;
 const Handle = uefi.Handle;
 const Guid = uefi.Guid;
+const Status = uefi.Status;
 
 pub const Udp6ServiceBindingProtocol = extern struct {
-    _create_child: extern fn (*const Udp6ServiceBindingProtocol, *?Handle) usize,
-    _destroy_child: extern fn (*const Udp6ServiceBindingProtocol, Handle) usize,
+    _create_child: extern fn (*const Udp6ServiceBindingProtocol, *?Handle) Status,
+    _destroy_child: extern fn (*const Udp6ServiceBindingProtocol, Handle) Status,
 
-    pub fn createChild(self: *const Udp6ServiceBindingProtocol, handle: *?Handle) usize {
+    pub fn createChild(self: *const Udp6ServiceBindingProtocol, handle: *?Handle) Status {
         return self._create_child(self, handle);
     }
 
-    pub fn destroyChild(self: *const Udp6ServiceBindingProtocol, handle: Handle) usize {
+    pub fn destroyChild(self: *const Udp6ServiceBindingProtocol, handle: Handle) Status {
         return self._destroy_child(self, handle);
     }
 
diff --git a/lib/std/os/uefi/status.zig b/lib/std/os/uefi/status.zig
index 171f3cb05c..0da4508e8f 100644
--- a/lib/std/os/uefi/status.zig
+++ b/lib/std/os/uefi/status.zig
@@ -1,124 +1,142 @@
 const high_bit = 1 << @typeInfo(usize).Int.bits - 1;
 
-/// The operation completed successfully.
-pub const success: usize = 0;
+pub const Status = extern enum(usize) {
+    /// The operation completed successfully.
+    Success = 0,
 
-/// The image failed to load.
-pub const load_error: usize = high_bit | 1;
+    /// The image failed to load.
+    LoadError = high_bit | 1,
 
-/// A parameter was incorrect.
-pub const invalid_parameter: usize = high_bit | 2;
+    /// A parameter was incorrect.
+    InvalidParameter = high_bit | 2,
 
-/// The operation is not supported.
-pub const unsupported: usize = high_bit | 3;
+    /// The operation is not supported.
+    Unsupported = high_bit | 3,
 
-/// The buffer was not the proper size for the request.
-pub const bad_buffer_size: usize = high_bit | 4;
+    /// The buffer was not the proper size for the request.
+    BadBufferSize = high_bit | 4,
 
-/// The buffer is not large enough to hold the requested data. The required buffer size is returned in the appropriate parameter when this error occurs.
-pub const buffer_too_small: usize = high_bit | 5;
+    /// The buffer is not large enough to hold the requested data. The required buffer size is returned in the appropriate parameter when this error occurs.
+    BufferTooSmall = high_bit | 5,
 
-/// There is no data pending upon return.
-pub const not_ready: usize = high_bit | 6;
+    /// There is no data pending upon return.
+    NotReady = high_bit | 6,
 
-/// The physical device reported an error while attempting the operation.
-pub const device_error: usize = high_bit | 7;
+    /// The physical device reported an error while attempting the operation.
+    DeviceError = high_bit | 7,
 
-/// The device cannot be written to.
-pub const write_protected: usize = high_bit | 8;
+    /// The device cannot be written to.
+    WriteProtected = high_bit | 8,
 
-/// A resource has run out.
-pub const out_of_resources: usize = high_bit | 9;
+    /// A resource has run out.
+    OutOfResources = high_bit | 9,
 
-/// An inconstancy was detected on the file system causing the operating to fail.
-pub const volume_corrupted: usize = high_bit | 10;
+    /// An inconstancy was detected on the file system causing the operating to fail.
+    VolumeCorrupted = high_bit | 10,
 
-/// There is no more space on the file system.
-pub const volume_full: usize = high_bit | 11;
+    /// There is no more space on the file system.
+    VolumeFull = high_bit | 11,
 
-/// The device does not contain any medium to perform the operation.
-pub const no_media: usize = high_bit | 12;
+    /// The device does not contain any medium to perform the operation.
+    NoMedia = high_bit | 12,
 
-/// The medium in the device has changed since the last access.
-pub const media_changed: usize = high_bit | 13;
+    /// The medium in the device has changed since the last access.
+    MediaChanged = high_bit | 13,
 
-/// The item was not found.
-pub const not_found: usize = high_bit | 14;
+    /// The item was not found.
+    NotFound = high_bit | 14,
 
-/// Access was denied.
-pub const access_denied: usize = high_bit | 15;
+    /// Access was denied.
+    AccessDenied = high_bit | 15,
 
-/// The server was not found or did not respond to the request.
-pub const no_response: usize = high_bit | 16;
+    /// The server was not found or did not respond to the request.
+    NoResponse = high_bit | 16,
 
-/// A mapping to a device does not exist.
-pub const no_mapping: usize = high_bit | 17;
+    /// A mapping to a device does not exist.
+    NoMapping = high_bit | 17,
 
-/// The timeout time expired.
-pub const timeout: usize = high_bit | 18;
+    /// The timeout time expired.
+    Timeout = high_bit | 18,
 
-/// The protocol has not been started.
-pub const not_started: usize = high_bit | 19;
+    /// The protocol has not been started.
+    NotStarted = high_bit | 19,
 
-/// The protocol has already been started.
-pub const already_started: usize = high_bit | 20;
+    /// The protocol has already been started.
+    AlreadyStarted = high_bit | 20,
 
-/// The operation was aborted.
-pub const aborted: usize = high_bit | 21;
+    /// The operation was aborted.
+    Aborted = high_bit | 21,
 
-/// An ICMP error occurred during the network operation.
-pub const icmp_error: usize = high_bit | 22;
+    /// An ICMP error occurred during the network operation.
+    IcmpError = high_bit | 22,
 
-/// A TFTP error occurred during the network operation.
-pub const tftp_error: usize = high_bit | 23;
+    /// A TFTP error occurred during the network operation.
+    TftpError = high_bit | 23,
 
-/// A protocol error occurred during the network operation.
-pub const protocol_error: usize = high_bit | 24;
+    /// A protocol error occurred during the network operation.
+    ProtocolError = high_bit | 24,
 
-/// The function encountered an internal version that was incompatible with a version requested by the caller.
-pub const incompatible_version: usize = high_bit | 25;
+    /// The function encountered an internal version that was incompatible with a version requested by the caller.
+    IncompatibleVersion = high_bit | 25,
 
-/// The function was not performed due to a security violation.
-pub const security_violation: usize = high_bit | 26;
+    /// The function was not performed due to a security violation.
+    SecurityViolation = high_bit | 26,
 
-/// A CRC error was detected.
-pub const crc_error: usize = high_bit | 27;
+    /// A CRC error was detected.
+    CrcError = high_bit | 27,
 
-/// Beginning or end of media was reached
-pub const end_of_media: usize = high_bit | 28;
+    /// Beginning or end of media was reached
+    EndOfMedia = high_bit | 28,
 
-/// The end of the file was reached.
-pub const end_of_file: usize = high_bit | 31;
+    /// The end of the file was reached.
+    EndOfFile = high_bit | 31,
 
-/// The language specified was invalid.
-pub const invalid_language: usize = high_bit | 32;
+    /// The language specified was invalid.
+    InvalidLanguage = high_bit | 32,
 
-/// The security status of the data is unknown or compromised and the data must be updated or replaced to restore a valid security status.
-pub const compromised_data: usize = high_bit | 33;
+    /// The security status of the data is unknown or compromised and the data must be updated or replaced to restore a valid security status.
+    CompromisedData = high_bit | 33,
 
-/// There is an address conflict address allocation
-pub const ip_address_conflict: usize = high_bit | 34;
+    /// There is an address conflict address allocation
+    IpAddressConflict = high_bit | 34,
 
-/// A HTTP error occurred during the network operation.
-pub const http_error: usize = high_bit | 35;
+    /// A HTTP error occurred during the network operation.
+    HttpError = high_bit | 35,
 
-/// The string contained one or more characters that the device could not render and were skipped.
-pub const warn_unknown_glyph: usize = 1;
+    NetworkUnreachable = high_bit | 100,
 
-/// The handle was closed, but the file was not deleted.
-pub const warn_delete_failure: usize = 2;
+    HostUnreachable = high_bit | 101,
 
-/// The handle was closed, but the data to the file was not flushed properly.
-pub const warn_write_failure: usize = 3;
+    ProtocolUnreachable = high_bit | 102,
 
-/// The resulting buffer was too small, and the data was truncated to the buffer size.
-pub const warn_buffer_too_small: usize = 4;
+    PortUnreachable = high_bit | 103,
 
-/// The data has not been updated within the timeframe set by localpolicy for this type of data.
-pub const warn_stale_data: usize = 5;
+    ConnectionFin = high_bit | 104,
 
-/// The resulting buffer contains UEFI-compliant file system.
-pub const warn_file_system: usize = 6;
+    ConnectionReset = high_bit | 105,
 
-/// The operation will be processed across a system reset.
-pub const warn_reset_required: usize = 7;
+    ConnectionRefused = high_bit | 106,
+
+    /// The string contained one or more characters that the device could not render and were skipped.
+    WarnUnknownGlyph = 1,
+
+    /// The handle was closed, but the file was not deleted.
+    WarnDeleteFailure = 2,
+
+    /// The handle was closed, but the data to the file was not flushed properly.
+    WarnWriteFailure = 3,
+
+    /// The resulting buffer was too small, and the data was truncated to the buffer size.
+    WarnBufferTooSmall = 4,
+
+    /// The data has not been updated within the timeframe set by localpolicy for this type of data.
+    WarnStaleData = 5,
+
+    /// The resulting buffer contains UEFI-compliant file system.
+    WarnFileSystem = 6,
+
+    /// The operation will be processed across a system reset.
+    WarnResetRequired = 7,
+
+    _,
+};
diff --git a/lib/std/os/uefi/tables.zig b/lib/std/os/uefi/tables.zig
index d34408dfba..0011c80a9c 100644
--- a/lib/std/os/uefi/tables.zig
+++ b/lib/std/os/uefi/tables.zig
@@ -1,3 +1,4 @@
+pub const AllocateType = @import("tables/boot_services.zig").AllocateType;
 pub const BootServices = @import("tables/boot_services.zig").BootServices;
 pub const ConfigurationTable = @import("tables/configuration_table.zig").ConfigurationTable;
 pub const global_variable align(8) = @import("tables/runtime_services.zig").global_variable;
diff --git a/lib/std/os/uefi/tables/boot_services.zig b/lib/std/os/uefi/tables/boot_services.zig
index 2358b4f842..1969b46403 100644
--- a/lib/std/os/uefi/tables/boot_services.zig
+++ b/lib/std/os/uefi/tables/boot_services.zig
@@ -2,6 +2,7 @@ const uefi = @import("std").os.uefi;
 const Event = uefi.Event;
 const Guid = uefi.Guid;
 const Handle = uefi.Handle;
+const Status = uefi.Status;
 const TableHeader = uefi.tables.TableHeader;
 const DevicePathProtocol = uefi.protocols.DevicePathProtocol;
 
@@ -19,101 +20,120 @@ const DevicePathProtocol = uefi.protocols.DevicePathProtocol;
 pub const BootServices = extern struct {
     hdr: TableHeader,
 
-    raiseTpl: usize, // TODO
-    restoreTpl: usize, // TODO
-    allocatePages: usize, // TODO
-    freePages: usize, // TODO
+    /// Raises a task's priority level and returns its previous level.
+    raiseTpl: extern fn (usize) usize,
+
+    /// Restores a task's priority level to its previous value.
+    restoreTpl: extern fn (usize) void,
+
+    /// Allocates memory pages from the system.
+    allocatePages: extern fn (AllocateType, MemoryType, usize, *[*]align(4096) u8) Status,
+
+    /// Frees memory pages.
+    freePages: extern fn ([*]align(4096) u8, usize) Status,
 
     /// Returns the current memory map.
-    getMemoryMap: extern fn (*usize, [*]MemoryDescriptor, *usize, *usize, *u32) usize,
+    getMemoryMap: extern fn (*usize, [*]MemoryDescriptor, *usize, *usize, *u32) Status,
 
     /// Allocates pool memory.
-    allocatePool: extern fn (MemoryType, usize, *align(8) [*]u8) usize,
+    allocatePool: extern fn (MemoryType, usize, *[*]align(8) u8) Status,
 
     /// Returns pool memory to the system.
-    freePool: extern fn ([*]align(8) u8) usize,
+    freePool: extern fn ([*]align(8) u8) Status,
 
     /// Creates an event.
-    createEvent: extern fn (u32, usize, ?extern fn (Event, ?*c_void) void, ?*const c_void, *Event) usize,
+    createEvent: extern fn (u32, usize, ?extern fn (Event, ?*c_void) void, ?*const c_void, *Event) Status,
 
     /// Sets the type of timer and the trigger time for a timer event.
-    setTimer: extern fn (Event, TimerDelay, u64) usize,
+    setTimer: extern fn (Event, TimerDelay, u64) Status,
 
     /// Stops execution until an event is signaled.
-    waitForEvent: extern fn (usize, [*]const Event, *usize) usize,
+    waitForEvent: extern fn (usize, [*]const Event, *usize) Status,
 
     /// Signals an event.
-    signalEvent: extern fn (Event) usize,
+    signalEvent: extern fn (Event) Status,
 
     /// Closes an event.
-    closeEvent: extern fn (Event) usize,
+    closeEvent: extern fn (Event) Status,
 
     /// Checks whether an event is in the signaled state.
-    checkEvent: extern fn (Event) usize,
+    checkEvent: extern fn (Event) Status,
 
-    installProtocolInterface: usize, // TODO
-    reinstallProtocolInterface: usize, // TODO
-    uninstallProtocolInterface: usize, // TODO
+    installProtocolInterface: Status, // TODO
+    reinstallProtocolInterface: Status, // TODO
+    uninstallProtocolInterface: Status, // TODO
 
     /// Queries a handle to determine if it supports a specified protocol.
-    handleProtocol: extern fn (Handle, *align(8) const Guid, *?*c_void) usize,
+    handleProtocol: extern fn (Handle, *align(8) const Guid, *?*c_void) Status,
 
     reserved: *c_void,
 
-    registerProtocolNotify: usize, // TODO
-    locateHandle: usize, // TODO
-    locateDevicePath: usize, // TODO
-    installConfigurationTable: usize, // TODO
+    registerProtocolNotify: Status, // TODO
+
+    /// Returns an array of handles that support a specified protocol.
+    locateHandle: extern fn (LocateSearchType, ?*align(8) const Guid, ?*const c_void, *usize, [*]Handle) Status,
+
+    locateDevicePath: Status, // TODO
+    installConfigurationTable: Status, // TODO
 
     /// Loads an EFI image into memory.
-    loadImage: extern fn (bool, Handle, ?*const DevicePathProtocol, ?[*]const u8, usize, *?Handle) usize,
+    loadImage: extern fn (bool, Handle, ?*const DevicePathProtocol, ?[*]const u8, usize, *?Handle) Status,
 
     /// Transfers control to a loaded image's entry point.
-    startImage: extern fn (Handle, ?*usize, ?*[*]u16) usize,
+    startImage: extern fn (Handle, ?*usize, ?*[*]u16) Status,
 
     /// Terminates a loaded EFI image and returns control to boot services.
-    exit: extern fn (Handle, usize, usize, ?*const c_void) usize,
+    exit: extern fn (Handle, Status, usize, ?*const c_void) Status,
 
     /// Unloads an image.
-    unloadImage: extern fn (Handle) usize,
+    unloadImage: extern fn (Handle) Status,
 
     /// Terminates all boot services.
-    exitBootServices: extern fn (Handle, usize) usize,
+    exitBootServices: extern fn (Handle, usize) Status,
 
-    getNextMonotonicCount: usize, // TODO
+    /// Returns a monotonically increasing count for the platform.
+    getNextMonotonicCount: extern fn (*u64) Status,
 
     /// Induces a fine-grained stall.
-    stall: extern fn (usize) usize,
+    stall: extern fn (usize) Status,
 
     /// Sets the system's watchdog timer.
-    setWatchdogTimer: extern fn (usize, u64, usize, ?[*]const u16) usize,
+    setWatchdogTimer: extern fn (usize, u64, usize, ?[*]const u16) Status,
 
-    connectController: usize, // TODO
-    disconnectController: usize, // TODO
+    connectController: Status, // TODO
+    disconnectController: Status, // TODO
 
     /// Queries a handle to determine if it supports a specified protocol.
-    openProtocol: extern fn (Handle, *align(8) const Guid, *?*c_void, ?Handle, ?Handle, OpenProtocolAttributes) usize,
+    openProtocol: extern fn (Handle, *align(8) const Guid, *?*c_void, ?Handle, ?Handle, OpenProtocolAttributes) Status,
 
     /// Closes a protocol on a handle that was opened using openProtocol().
-    closeProtocol: extern fn (Handle, *align(8) const Guid, Handle, ?Handle) usize,
+    closeProtocol: extern fn (Handle, *align(8) const Guid, Handle, ?Handle) Status,
 
     /// Retrieves the list of agents that currently have a protocol interface opened.
-    openProtocolInformation: extern fn (Handle, *align(8) const Guid, *[*]ProtocolInformationEntry, *usize) usize,
+    openProtocolInformation: extern fn (Handle, *align(8) const Guid, *[*]ProtocolInformationEntry, *usize) Status,
 
-    protocolsPerHandle: usize, // TODO
+    /// Retrieves the list of protocol interface GUIDs that are installed on a handle in a buffer allocated from pool.
+    protocolsPerHandle: extern fn (Handle, *[*]*align(8) const Guid, *usize) Status,
 
     /// Returns an array of handles that support the requested protocol in a buffer allocated from pool.
-    locateHandleBuffer: extern fn (LocateSearchType, ?*align(8) const Guid, ?*const c_void, *usize, *[*]Handle) usize,
+    locateHandleBuffer: extern fn (LocateSearchType, ?*align(8) const Guid, ?*const c_void, *usize, *[*]Handle) Status,
 
     /// Returns the first protocol instance that matches the given protocol.
-    locateProtocol: extern fn (*align(8) const Guid, ?*const c_void, *?*c_void) usize,
+    locateProtocol: extern fn (*align(8) const Guid, ?*const c_void, *?*c_void) Status,
 
-    installMultipleProtocolInterfaces: usize, // TODO
-    uninstallMultipleProtocolInterfaces: usize, // TODO
-    calculateCrc32: usize, // TODO
-    copyMem: usize, // TODO
-    setMem: usize, // TODO
-    createEventEx: usize, // TODO
+    installMultipleProtocolInterfaces: Status, // TODO
+    uninstallMultipleProtocolInterfaces: Status, // TODO
+
+    /// Computes and returns a 32-bit CRC for a data buffer.
+    calculateCrc32: extern fn ([*]const u8, usize, *u32) Status,
+
+    /// Copies the contents of one buffer to another buffer
+    copyMem: extern fn ([*]u8, [*]const u8, usize) void,
+
+    /// Fills a buffer with a specified value
+    setMem: extern fn ([*]u8, usize, u8) void,
+
+    createEventEx: Status, // TODO
 
     pub const signature: u64 = 0x56524553544f4f42;
 
@@ -187,13 +207,13 @@ pub const LocateSearchType = extern enum(u32) {
 };
 
 pub const OpenProtocolAttributes = packed struct {
-    by_handle_protocol: bool,
-    get_protocol: bool,
-    test_protocol: bool,
-    by_child_controller: bool,
-    by_driver: bool,
-    exclusive: bool,
-    _pad: u26,
+    by_handle_protocol: bool = false,
+    get_protocol: bool = false,
+    test_protocol: bool = false,
+    by_child_controller: bool = false,
+    by_driver: bool = false,
+    exclusive: bool = false,
+    _pad: u26 = undefined,
 };
 
 pub const ProtocolInformationEntry = extern struct {
@@ -202,3 +222,9 @@ pub const ProtocolInformationEntry = extern struct {
     attributes: OpenProtocolAttributes,
     open_count: u32,
 };
+
+pub const AllocateType = extern enum(u32) {
+    AllocateAnyPages,
+    AllocateMaxAddress,
+    AllocateAddress,
+};
diff --git a/lib/std/os/uefi/tables/runtime_services.zig b/lib/std/os/uefi/tables/runtime_services.zig
index 9e6861377b..1f0c7efad4 100644
--- a/lib/std/os/uefi/tables/runtime_services.zig
+++ b/lib/std/os/uefi/tables/runtime_services.zig
@@ -3,6 +3,7 @@ const Guid = uefi.Guid;
 const TableHeader = uefi.tables.TableHeader;
 const Time = uefi.Time;
 const TimeCapabilities = uefi.TimeCapabilities;
+const Status = uefi.Status;
 
 /// Runtime services are provided by the firmware before and after exitBootServices has been called.
 ///
@@ -16,31 +17,31 @@ pub const RuntimeServices = extern struct {
     hdr: TableHeader,
 
     /// Returns the current time and date information, and the time-keeping capabilities of the hardware platform.
-    getTime: extern fn (*uefi.Time, ?*TimeCapabilities) usize,
+    getTime: extern fn (*uefi.Time, ?*TimeCapabilities) Status,
 
-    setTime: usize, // TODO
-    getWakeupTime: usize, // TODO
-    setWakeupTime: usize, // TODO
-    setVirtualAddressMap: usize, // TODO
-    convertPointer: usize, // TODO
+    setTime: Status, // TODO
+    getWakeupTime: Status, // TODO
+    setWakeupTime: Status, // TODO
+    setVirtualAddressMap: Status, // TODO
+    convertPointer: Status, // TODO
 
     /// Returns the value of a variable.
-    getVariable: extern fn ([*:0]const u16, *align(8) const Guid, ?*u32, *usize, ?*c_void) usize,
+    getVariable: extern fn ([*:0]const u16, *align(8) const Guid, ?*u32, *usize, ?*c_void) Status,
 
     /// Enumerates the current variable names.
-    getNextVariableName: extern fn (*usize, [*]u16, *align(8) Guid) usize,
+    getNextVariableName: extern fn (*usize, [*:0]u16, *align(8) Guid) Status,
 
     /// Sets the value of a variable.
-    setVariable: extern fn ([*:0]const u16, *align(8) const Guid, u32, usize, *c_void) usize,
+    setVariable: extern fn ([*:0]const u16, *align(8) const Guid, u32, usize, *c_void) Status,
 
-    getNextHighMonotonicCount: usize, // TODO
+    getNextHighMonotonicCount: Status, // TODO
 
     /// Resets the entire platform.
-    resetSystem: extern fn (ResetType, usize, usize, ?*const c_void) noreturn,
+    resetSystem: extern fn (ResetType, Status, usize, ?*const c_void) noreturn,
 
-    updateCapsule: usize, // TODO
-    queryCapsuleCapabilities: usize, // TODO
-    queryVariableInfo: usize, // TODO
+    updateCapsule: Status, // TODO
+    queryCapsuleCapabilities: Status, // TODO
+    queryVariableInfo: Status, // TODO
 
     pub const signature: u64 = 0x56524553544e5552;
 };
diff --git a/lib/std/os/windows.zig b/lib/std/os/windows.zig
index ba55845a4f..6c9a1f24b7 100644
--- a/lib/std/os/windows.zig
+++ b/lib/std/os/windows.zig
@@ -407,6 +407,7 @@ pub fn ReadFile(in_hFile: HANDLE, buffer: []u8, offset: ?u64) ReadFileError!usiz
                 switch (kernel32.GetLastError()) {
                     .OPERATION_ABORTED => continue,
                     .BROKEN_PIPE => return index,
+                    .HANDLE_EOF => return index,
                     else => |err| return unexpectedError(err),
                 }
             }
@@ -591,6 +592,8 @@ pub const CreateDirectoryError = error{
     FileNotFound,
     NoDevice,
     AccessDenied,
+    InvalidUtf8,
+    BadPathName,
     Unexpected,
 };
 
diff --git a/lib/std/os/windows/bits.zig b/lib/std/os/windows/bits.zig
index 41466234ed..1e49b903cb 100644
--- a/lib/std/os/windows/bits.zig
+++ b/lib/std/os/windows/bits.zig
@@ -225,6 +225,10 @@ pub const FILE_POSITION_INFORMATION = extern struct {
     CurrentByteOffset: LARGE_INTEGER,
 };
 
+pub const FILE_END_OF_FILE_INFORMATION = extern struct {
+    EndOfFile: LARGE_INTEGER,
+};
+
 pub const FILE_MODE_INFORMATION = extern struct {
     Mode: ULONG,
 };
diff --git a/lib/std/os/windows/kernel32.zig b/lib/std/os/windows/kernel32.zig
index 05a7a8f6a3..2e5214eb20 100644
--- a/lib/std/os/windows/kernel32.zig
+++ b/lib/std/os/windows/kernel32.zig
@@ -8,6 +8,7 @@ pub extern "kernel32" fn CancelIoEx(hFile: HANDLE, lpOverlapped: LPOVERLAPPED) c
 pub extern "kernel32" fn CloseHandle(hObject: HANDLE) callconv(.Stdcall) BOOL;
 
 pub extern "kernel32" fn CreateDirectoryW(lpPathName: [*:0]const u16, lpSecurityAttributes: ?*SECURITY_ATTRIBUTES) callconv(.Stdcall) BOOL;
+pub extern "kernel32" fn SetEndOfFile(hFile: HANDLE) callconv(.Stdcall) BOOL;
 
 pub extern "kernel32" fn CreateEventExW(
     lpEventAttributes: ?*SECURITY_ATTRIBUTES,
diff --git a/lib/std/os/windows/ntdll.zig b/lib/std/os/windows/ntdll.zig
index 49e60803bc..7ba58b2392 100644
--- a/lib/std/os/windows/ntdll.zig
+++ b/lib/std/os/windows/ntdll.zig
@@ -16,6 +16,13 @@ pub extern "NtDll" fn NtQueryInformationFile(
     Length: ULONG,
     FileInformationClass: FILE_INFORMATION_CLASS,
 ) callconv(.Stdcall) NTSTATUS;
+pub extern "NtDll" fn NtSetInformationFile(
+    FileHandle: HANDLE,
+    IoStatusBlock: *IO_STATUS_BLOCK,
+    FileInformation: PVOID,
+    Length: ULONG,
+    FileInformationClass: FILE_INFORMATION_CLASS,
+) callconv(.Stdcall) NTSTATUS;
 
 pub extern "NtDll" fn NtQueryAttributesFile(
     ObjectAttributes: *OBJECT_ATTRIBUTES,
diff --git a/lib/std/pdb.zig b/lib/std/pdb.zig
index db60e60494..93fef0b16d 100644
--- a/lib/std/pdb.zig
+++ b/lib/std/pdb.zig
@@ -495,8 +495,7 @@ const Msf = struct {
     streams: []MsfStream,
 
     fn openFile(self: *Msf, allocator: *mem.Allocator, file: File) !void {
-        var file_stream = file.inStream();
-        const in = &file_stream.stream;
+        const in = file.inStream();
 
         const superblock = try in.readStruct(SuperBlock);
 
@@ -529,7 +528,7 @@ const Msf = struct {
         );
 
         const begin = self.directory.pos;
-        const stream_count = try self.directory.stream.readIntLittle(u32);
+        const stream_count = try self.directory.inStream().readIntLittle(u32);
         const stream_sizes = try allocator.alloc(u32, stream_count);
         defer allocator.free(stream_sizes);
 
@@ -538,7 +537,7 @@ const Msf = struct {
         // and must be taken into account when resolving stream indices.
         const Nil = 0xFFFFFFFF;
         for (stream_sizes) |*s, i| {
-            const size = try self.directory.stream.readIntLittle(u32);
+            const size = try self.directory.inStream().readIntLittle(u32);
             s.* = if (size == Nil) 0 else blockCountFromSize(size, superblock.BlockSize);
         }
 
@@ -553,7 +552,7 @@ const Msf = struct {
                 var blocks = try allocator.alloc(u32, size);
                 var j: u32 = 0;
                 while (j < size) : (j += 1) {
-                    const block_id = try self.directory.stream.readIntLittle(u32);
+                    const block_id = try self.directory.inStream().readIntLittle(u32);
                     const n = (block_id % superblock.BlockSize);
                     // 0 is for SuperBlock, 1 and 2 for FPMs.
                     if (block_id == 0 or n == 1 or n == 2 or block_id * superblock.BlockSize > try file.getEndPos())
@@ -632,11 +631,7 @@ const MsfStream = struct {
     blocks: []u32 = undefined,
     block_size: u32 = undefined,
 
-    /// Implementation of InStream trait for Pdb.MsfStream
-    stream: Stream = undefined,
-
     pub const Error = @TypeOf(read).ReturnType.ErrorSet;
-    pub const Stream = io.InStream(Error);
 
     fn init(block_size: u32, file: File, blocks: []u32) MsfStream {
         const stream = MsfStream{
@@ -644,7 +639,6 @@ const MsfStream = struct {
             .pos = 0,
             .blocks = blocks,
             .block_size = block_size,
-            .stream = Stream{ .readFn = readFn },
         };
 
         return stream;
@@ -653,7 +647,7 @@ const MsfStream = struct {
     fn readNullTermString(self: *MsfStream, allocator: *mem.Allocator) ![]u8 {
         var list = ArrayList(u8).init(allocator);
         while (true) {
-            const byte = try self.stream.readByte();
+            const byte = try self.inStream().readByte();
             if (byte == 0) {
                 return list.toSlice();
             }
@@ -667,8 +661,7 @@ const MsfStream = struct {
         var offset = self.pos % self.block_size;
 
         try self.in_file.seekTo(block * self.block_size + offset);
-        var file_stream = self.in_file.inStream();
-        const in = &file_stream.stream;
+        const in = self.in_file.inStream();
 
         var size: usize = 0;
         var rem_buffer = buffer;
@@ -715,8 +708,7 @@ const MsfStream = struct {
         return block * self.block_size + offset;
     }
 
-    fn readFn(in_stream: *Stream, buffer: []u8) Error!usize {
-        const self = @fieldParentPtr(MsfStream, "stream", in_stream);
-        return self.read(buffer);
+    fn inStream(self: *MsfStream) std.io.InStream(*MsfStream, Error, read) {
+        return .{ .context = self };
     }
 };
diff --git a/lib/std/progress.zig b/lib/std/progress.zig
index 1c5ecd261a..a693ec8619 100644
--- a/lib/std/progress.zig
+++ b/lib/std/progress.zig
@@ -177,7 +177,7 @@ pub const Progress = struct {
     pub fn log(self: *Progress, comptime format: []const u8, args: var) void {
         const file = self.terminal orelse return;
         self.refresh();
-        file.outStream().stream.print(format, args) catch {
+        file.outStream().print(format, args) catch {
             self.terminal = null;
             return;
         };
@@ -190,7 +190,7 @@ pub const Progress = struct {
             end.* += amt;
             self.columns_written += amt;
         } else |err| switch (err) {
-            error.BufferTooSmall => {
+            error.NoSpaceLeft => {
                 self.columns_written += self.output_buffer.len - end.*;
                 end.* = self.output_buffer.len;
             },
diff --git a/lib/std/special/build_runner.zig b/lib/std/special/build_runner.zig
index baf21570ec..974247e2a1 100644
--- a/lib/std/special/build_runner.zig
+++ b/lib/std/special/build_runner.zig
@@ -42,8 +42,8 @@ pub fn main() !void {
 
     var targets = ArrayList([]const u8).init(allocator);
 
-    const stderr_stream = &io.getStdErr().outStream().stream;
-    const stdout_stream = &io.getStdOut().outStream().stream;
+    const stderr_stream = io.getStdErr().outStream();
+    const stdout_stream = io.getStdOut().outStream();
 
     while (nextArg(args, &arg_idx)) |arg| {
         if (mem.startsWith(u8, arg, "-D")) {
@@ -159,7 +159,7 @@ fn usage(builder: *Builder, already_ran_build: bool, out_stream: var) !void {
         try out_stream.print("  {s:22} {}\n", .{ name, top_level_step.description });
     }
 
-    try out_stream.write(
+    try out_stream.writeAll(
         \\
         \\General Options:
         \\  --help                 Print this help and exit
@@ -184,7 +184,7 @@ fn usage(builder: *Builder, already_ran_build: bool, out_stream: var) !void {
         }
     }
 
-    try out_stream.write(
+    try out_stream.writeAll(
         \\
         \\Advanced Options:
         \\  --build-file [file]         Override path to build.zig
diff --git a/lib/std/start.zig b/lib/std/start.zig
index b8e3e97f94..857af03b56 100644
--- a/lib/std/start.zig
+++ b/lib/std/start.zig
@@ -55,25 +55,24 @@ fn wasm_freestanding_start() callconv(.C) void {
 }
 
 fn EfiMain(handle: uefi.Handle, system_table: *uefi.tables.SystemTable) callconv(.C) usize {
-    const bad_efi_main_ret = "expected return type of main to be 'void', 'noreturn', or 'usize'";
     uefi.handle = handle;
     uefi.system_table = system_table;
 
-    switch (@typeInfo(@TypeOf(root.main).ReturnType)) {
-        .NoReturn => {
+    switch (@TypeOf(root.main).ReturnType) {
+        noreturn => {
             root.main();
         },
-        .Void => {
+        void => {
             root.main();
             return 0;
         },
-        .Int => |info| {
-            if (info.bits != @typeInfo(usize).Int.bits) {
-                @compileError(bad_efi_main_ret);
-            }
+        usize => {
             return root.main();
         },
-        else => @compileError(bad_efi_main_ret),
+        uefi.Status => {
+            return @enumToInt(root.main());
+        },
+        else => @compileError("expected return type of main to be 'void', 'noreturn', 'usize', or 'std.os.uefi.Status'"),
     }
 }
 
diff --git a/lib/std/std.zig b/lib/std/std.zig
index dd4d968efb..9277370ca6 100644
--- a/lib/std/std.zig
+++ b/lib/std/std.zig
@@ -5,7 +5,6 @@ pub const BloomFilter = @import("bloom_filter.zig").BloomFilter;
 pub const BufMap = @import("buf_map.zig").BufMap;
 pub const BufSet = @import("buf_set.zig").BufSet;
 pub const Buffer = @import("buffer.zig").Buffer;
-pub const BufferOutStream = @import("io.zig").BufferOutStream;
 pub const ChildProcess = @import("child_process.zig").ChildProcess;
 pub const DynLib = @import("dynamic_library.zig").DynLib;
 pub const HashMap = @import("hash_map.zig").HashMap;
diff --git a/lib/std/unicode.zig b/lib/std/unicode.zig
index 85c91602d0..8ed51fa145 100644
--- a/lib/std/unicode.zig
+++ b/lib/std/unicode.zig
@@ -629,3 +629,71 @@ test "utf8ToUtf16LeWithNull" {
         testing.expect(utf16[2] == 0);
     }
 }
+
+/// Converts a UTF-8 string literal into a UTF-16LE string literal. 
+pub fn utf8ToUtf16LeStringLiteral(comptime utf8: []const u8) *const [calcUtf16LeLen(utf8) :0] u16 {
+    comptime {
+        const len: usize = calcUtf16LeLen(utf8);
+        var utf16le: [len :0]u16 = [_ :0]u16{0} ** len;
+        const utf16le_len = utf8ToUtf16Le(&utf16le, utf8[0..]) catch |err| @compileError(err);
+        assert(len == utf16le_len);
+        return &utf16le;
+    }
+}
+
+/// Returns length of a supplied UTF-8 string literal. Asserts that the data is valid UTF-8.
+fn calcUtf16LeLen(utf8: []const u8) usize {
+    var src_i: usize = 0;
+    var dest_len: usize = 0;
+    while (src_i < utf8.len) {
+        const n = utf8ByteSequenceLength(utf8[src_i]) catch unreachable;
+        const next_src_i = src_i + n;
+        const codepoint = utf8Decode(utf8[src_i..next_src_i]) catch unreachable;
+        if (codepoint < 0x10000) {
+            dest_len += 1;
+        } else {
+            dest_len += 2;
+        }
+        src_i = next_src_i;
+    }
+    return dest_len;
+}
+
+test "utf8ToUtf16LeStringLiteral" {
+{
+        const bytes = [_:0]u16{ 0x41 };
+        const utf16 = utf8ToUtf16LeStringLiteral("A");
+        testing.expectEqualSlices(u16, &bytes, utf16);
+        testing.expect(utf16[1] == 0);
+    }
+    {
+        const bytes = [_:0]u16{ 0xD801, 0xDC37 };
+        const utf16 = utf8ToUtf16LeStringLiteral("𐐷");
+        testing.expectEqualSlices(u16, &bytes, utf16);
+        testing.expect(utf16[2] == 0);
+    }
+    {
+        const bytes = [_:0]u16{ 0x02FF };
+        const utf16 = utf8ToUtf16LeStringLiteral("\u{02FF}");
+        testing.expectEqualSlices(u16, &bytes, utf16);
+        testing.expect(utf16[1] == 0);
+    }
+    {
+        const bytes = [_:0]u16{ 0x7FF };
+        const utf16 = utf8ToUtf16LeStringLiteral("\u{7FF}");
+        testing.expectEqualSlices(u16, &bytes, utf16);
+        testing.expect(utf16[1] == 0);
+    }
+    {
+        const bytes = [_:0]u16{ 0x801 };
+        const utf16 = utf8ToUtf16LeStringLiteral("\u{801}");
+        testing.expectEqualSlices(u16, &bytes, utf16);
+        testing.expect(utf16[1] == 0);
+    }
+    {
+        const bytes = [_:0]u16{ 0xDBFF, 0xDFFF };
+        const utf16 = utf8ToUtf16LeStringLiteral("\u{10FFFF}");
+        testing.expectEqualSlices(u16, &bytes, utf16);
+        testing.expect(utf16[2] == 0);
+    }
+}
diff --git a/lib/std/zig/ast.zig b/lib/std/zig/ast.zig
index 1aa440fbc7..6738bb34d7 100644
--- a/lib/std/zig/ast.zig
+++ b/lib/std/zig/ast.zig
@@ -378,7 +378,7 @@ pub const Error = union(enum) {
             token: TokenIndex,
 
             pub fn render(self: *const ThisError, tokens: *Tree.TokenList, stream: var) !void {
-                return stream.write(msg);
+                return stream.writeAll(msg);
             }
         };
     }
@@ -434,6 +434,7 @@ pub const Node = struct {
         ContainerDecl,
         Asm,
         Comptime,
+        Noasync,
         Block,
 
         // Misc
@@ -502,68 +503,72 @@ pub const Node = struct {
         var n = base;
         while (true) {
             switch (n.id) {
-                Id.Root,
-                Id.ContainerField,
-                Id.ParamDecl,
-                Id.Block,
-                Id.Payload,
-                Id.PointerPayload,
-                Id.PointerIndexPayload,
-                Id.Switch,
-                Id.SwitchCase,
-                Id.SwitchElse,
-                Id.FieldInitializer,
-                Id.DocComment,
-                Id.TestDecl,
+                .Root,
+                .ContainerField,
+                .ParamDecl,
+                .Block,
+                .Payload,
+                .PointerPayload,
+                .PointerIndexPayload,
+                .Switch,
+                .SwitchCase,
+                .SwitchElse,
+                .FieldInitializer,
+                .DocComment,
+                .TestDecl,
                 => return false,
-                Id.While => {
+                .While => {
                     const while_node = @fieldParentPtr(While, "base", n);
                     if (while_node.@"else") |@"else"| {
                         n = &@"else".base;
                         continue;
                     }
 
-                    return while_node.body.id != Id.Block;
+                    return while_node.body.id != .Block;
                 },
-                Id.For => {
+                .For => {
                     const for_node = @fieldParentPtr(For, "base", n);
                     if (for_node.@"else") |@"else"| {
                         n = &@"else".base;
                         continue;
                     }
 
-                    return for_node.body.id != Id.Block;
+                    return for_node.body.id != .Block;
                 },
-                Id.If => {
+                .If => {
                     const if_node = @fieldParentPtr(If, "base", n);
                     if (if_node.@"else") |@"else"| {
                         n = &@"else".base;
                         continue;
                     }
 
-                    return if_node.body.id != Id.Block;
+                    return if_node.body.id != .Block;
                 },
-                Id.Else => {
+                .Else => {
                     const else_node = @fieldParentPtr(Else, "base", n);
                     n = else_node.body;
                     continue;
                 },
-                Id.Defer => {
+                .Defer => {
                     const defer_node = @fieldParentPtr(Defer, "base", n);
-                    return defer_node.expr.id != Id.Block;
+                    return defer_node.expr.id != .Block;
                 },
-                Id.Comptime => {
+                .Comptime => {
                     const comptime_node = @fieldParentPtr(Comptime, "base", n);
-                    return comptime_node.expr.id != Id.Block;
+                    return comptime_node.expr.id != .Block;
                 },
-                Id.Suspend => {
+                .Suspend => {
                     const suspend_node = @fieldParentPtr(Suspend, "base", n);
                     if (suspend_node.body) |body| {
-                        return body.id != Id.Block;
+                        return body.id != .Block;
                     }
 
                     return true;
                 },
+                .Noasync => {
+                    const noasync_node = @fieldParentPtr(Noasync, "base", n);
+                    return noasync_node.expr.id != .Block;
+                },
                 else => return true,
             }
         }
@@ -1081,6 +1086,29 @@ pub const Node = struct {
         }
     };
 
+    pub const Noasync = struct {
+        base: Node = Node{ .id = .Noasync },
+        noasync_token: TokenIndex,
+        expr: *Node,
+
+        pub fn iterate(self: *Noasync, index: usize) ?*Node {
+            var i = index;
+
+            if (i < 1) return self.expr;
+            i -= 1;
+
+            return null;
+        }
+
+        pub fn firstToken(self: *const Noasync) TokenIndex {
+            return self.noasync_token;
+        }
+
+        pub fn lastToken(self: *const Noasync) TokenIndex {
+            return self.expr.lastToken();
+        }
+    };
+
     pub const Payload = struct {
         base: Node = Node{ .id = .Payload },
         lpipe: TokenIndex,
@@ -1563,9 +1591,7 @@ pub const Node = struct {
         pub const Op = union(enum) {
             AddressOf,
             ArrayType: ArrayInfo,
-            Await: struct {
-                noasync_token: ?TokenIndex = null,
-            },
+            Await,
             BitNot,
             BoolNot,
             Cancel,
diff --git a/lib/std/zig/cross_target.zig b/lib/std/zig/cross_target.zig
index cec3ea05e5..130e8cdbc1 100644
--- a/lib/std/zig/cross_target.zig
+++ b/lib/std/zig/cross_target.zig
@@ -504,22 +504,22 @@ pub const CrossTarget = struct {
         if (self.os_version_min != null or self.os_version_max != null) {
             switch (self.getOsVersionMin()) {
                 .none => {},
-                .semver => |v| try result.print(".{}", .{v}),
-                .windows => |v| try result.print(".{}", .{@tagName(v)}),
+                .semver => |v| try result.outStream().print(".{}", .{v}),
+                .windows => |v| try result.outStream().print(".{}", .{@tagName(v)}),
             }
         }
         if (self.os_version_max) |max| {
             switch (max) {
                 .none => {},
-                .semver => |v| try result.print("...{}", .{v}),
-                .windows => |v| try result.print("...{}", .{@tagName(v)}),
+                .semver => |v| try result.outStream().print("...{}", .{v}),
+                .windows => |v| try result.outStream().print("...{}", .{@tagName(v)}),
             }
         }
 
         if (self.glibc_version) |v| {
-            try result.print("-{}.{}", .{ @tagName(self.getAbi()), v });
+            try result.outStream().print("-{}.{}", .{ @tagName(self.getAbi()), v });
         } else if (self.abi) |abi| {
-            try result.print("-{}", .{@tagName(abi)});
+            try result.outStream().print("-{}", .{@tagName(abi)});
         }
 
         return result.toOwnedSlice();
diff --git a/lib/std/zig/parse.zig b/lib/std/zig/parse.zig
index cadf25eef6..9a574c6231 100644
--- a/lib/std/zig/parse.zig
+++ b/lib/std/zig/parse.zig
@@ -462,6 +462,7 @@ fn parseContainerField(arena: *Allocator, it: *TokenIterator, tree: *Tree) !?*No
 /// Statement
 ///     <- KEYWORD_comptime? VarDecl
 ///      / KEYWORD_comptime BlockExprStatement
+///      / KEYWORD_noasync BlockExprStatement
 ///      / KEYWORD_suspend (SEMICOLON / BlockExprStatement)
 ///      / KEYWORD_defer BlockExprStatement
 ///      / KEYWORD_errdefer BlockExprStatement
@@ -493,6 +494,19 @@ fn parseStatement(arena: *Allocator, it: *TokenIterator, tree: *Tree) Error!?*No
         return &node.base;
     }
 
+    if (eatToken(it, .Keyword_noasync)) |noasync_token| {
+        const block_expr = try expectNode(arena, it, tree, parseBlockExprStatement, .{
+            .ExpectedBlockOrAssignment = .{ .token = it.index },
+        });
+
+        const node = try arena.create(Node.Noasync);
+        node.* = .{
+            .noasync_token = noasync_token,
+            .expr = block_expr,
+        };
+        return &node.base;
+    }
+
     if (eatToken(it, .Keyword_suspend)) |suspend_token| {
         const semicolon = eatToken(it, .Semicolon);
 
@@ -856,6 +870,7 @@ fn parsePrefixExpr(arena: *Allocator, it: *TokenIterator, tree: *Tree) !?*Node {
 ///      / IfExpr
 ///      / KEYWORD_break BreakLabel? Expr?
 ///      / KEYWORD_comptime Expr
+///      / KEYWORD_noasync Expr
 ///      / KEYWORD_continue BreakLabel?
 ///      / KEYWORD_resume Expr
 ///      / KEYWORD_return Expr?
@@ -870,7 +885,7 @@ fn parsePrimaryExpr(arena: *Allocator, it: *TokenIterator, tree: *Tree) !?*Node
         const label = try parseBreakLabel(arena, it, tree);
         const expr_node = try parseExpr(arena, it, tree);
         const node = try arena.create(Node.ControlFlowExpression);
-        node.* = Node.ControlFlowExpression{
+        node.* = .{
             .ltoken = token,
             .kind = Node.ControlFlowExpression.Kind{ .Break = label },
             .rhs = expr_node,
@@ -883,7 +898,7 @@ fn parsePrimaryExpr(arena: *Allocator, it: *TokenIterator, tree: *Tree) !?*Node
             .ExpectedExpr = AstError.ExpectedExpr{ .token = it.index },
         });
         const node = try arena.create(Node.Comptime);
-        node.* = Node.Comptime{
+        node.* = .{
             .doc_comments = null,
             .comptime_token = token,
             .expr = expr_node,
@@ -891,10 +906,22 @@ fn parsePrimaryExpr(arena: *Allocator, it: *TokenIterator, tree: *Tree) !?*Node
         return &node.base;
     }
 
+    if (eatToken(it, .Keyword_noasync)) |token| {
+        const expr_node = try expectNode(arena, it, tree, parseExpr, AstError{
+            .ExpectedExpr = AstError.ExpectedExpr{ .token = it.index },
+        });
+        const node = try arena.create(Node.Noasync);
+        node.* = .{
+            .noasync_token = token,
+            .expr = expr_node,
+        };
+        return &node.base;
+    }
+
     if (eatToken(it, .Keyword_continue)) |token| {
         const label = try parseBreakLabel(arena, it, tree);
         const node = try arena.create(Node.ControlFlowExpression);
-        node.* = Node.ControlFlowExpression{
+        node.* = .{
             .ltoken = token,
             .kind = Node.ControlFlowExpression.Kind{ .Continue = label },
             .rhs = null,
@@ -907,7 +934,7 @@ fn parsePrimaryExpr(arena: *Allocator, it: *TokenIterator, tree: *Tree) !?*Node
             .ExpectedExpr = AstError.ExpectedExpr{ .token = it.index },
         });
         const node = try arena.create(Node.PrefixOp);
-        node.* = Node.PrefixOp{
+        node.* = .{
             .op_token = token,
             .op = Node.PrefixOp.Op.Resume,
             .rhs = expr_node,
@@ -918,7 +945,7 @@ fn parsePrimaryExpr(arena: *Allocator, it: *TokenIterator, tree: *Tree) !?*Node
     if (eatToken(it, .Keyword_return)) |token| {
         const expr_node = try parseExpr(arena, it, tree);
         const node = try arena.create(Node.ControlFlowExpression);
-        node.* = Node.ControlFlowExpression{
+        node.* = .{
             .ltoken = token,
             .kind = Node.ControlFlowExpression.Kind.Return,
             .rhs = expr_node,
@@ -1126,19 +1153,18 @@ fn parseErrorUnionExpr(arena: *Allocator, it: *TokenIterator, tree: *Tree) !?*No
 
 /// SuffixExpr
 ///     <- KEYWORD_async PrimaryTypeExpr SuffixOp* FnCallArguments
-///      / KEYWORD_noasync PrimaryTypeExpr SuffixOp* FnCallArguments
 ///      / PrimaryTypeExpr (SuffixOp / FnCallArguments)*
 fn parseSuffixExpr(arena: *Allocator, it: *TokenIterator, tree: *Tree) !?*Node {
-    const maybe_async = eatAnnotatedToken(it, .Keyword_async) orelse eatAnnotatedToken(it, .Keyword_noasync);
+    const maybe_async = eatToken(it, .Keyword_async);
     if (maybe_async) |async_token| {
         const token_fn = eatToken(it, .Keyword_fn);
-        if (async_token.ptr.id == .Keyword_async and token_fn != null) {
+        if (token_fn != null) {
             // HACK: If we see the keyword `fn`, then we assume that
             //       we are parsing an async fn proto, and not a call.
             //       We therefore put back all tokens consumed by the async
             //       prefix...
             putBackToken(it, token_fn.?);
-            putBackToken(it, async_token.index);
+            putBackToken(it, async_token);
             return parsePrimaryTypeExpr(arena, it, tree);
         }
         // TODO: Implement hack for parsing `async fn ...` in ast_parse_suffix_expr
@@ -1167,7 +1193,7 @@ fn parseSuffixExpr(arena: *Allocator, it: *TokenIterator, tree: *Tree) !?*Node {
             .op = Node.SuffixOp.Op{
                 .Call = Node.SuffixOp.Op.Call{
                     .params = params.list,
-                    .async_token = async_token.index,
+                    .async_token = async_token,
                 },
             },
             .rtoken = params.rparen,
@@ -1224,6 +1250,7 @@ fn parseSuffixExpr(arena: *Allocator, it: *TokenIterator, tree: *Tree) !?*Node {
 ///      / IfTypeExpr
 ///      / INTEGER
 ///      / KEYWORD_comptime TypeExpr
+///      / KEYWORD_noasync TypeExpr
 ///      / KEYWORD_error DOT IDENTIFIER
 ///      / KEYWORD_false
 ///      / KEYWORD_null
@@ -1255,13 +1282,22 @@ fn parsePrimaryTypeExpr(arena: *Allocator, it: *TokenIterator, tree: *Tree) !?*N
     if (eatToken(it, .Keyword_comptime)) |token| {
         const expr = (try parseTypeExpr(arena, it, tree)) orelse return null;
         const node = try arena.create(Node.Comptime);
-        node.* = Node.Comptime{
+        node.* = .{
             .doc_comments = null,
             .comptime_token = token,
             .expr = expr,
         };
         return &node.base;
     }
+    if (eatToken(it, .Keyword_noasync)) |token| {
+        const expr = (try parseTypeExpr(arena, it, tree)) orelse return null;
+        const node = try arena.create(Node.Noasync);
+        node.* = .{
+            .noasync_token = token,
+            .expr = expr,
+        };
+        return &node.base;
+    }
     if (eatToken(it, .Keyword_error)) |token| {
         const period = try expectToken(it, tree, .Period);
         const identifier = try expectNode(arena, it, tree, parseIdentifier, AstError{
@@ -1269,7 +1305,7 @@ fn parsePrimaryTypeExpr(arena: *Allocator, it: *TokenIterator, tree: *Tree) !?*N
         });
         const global_error_set = try createLiteral(arena, Node.ErrorType, token);
         const node = try arena.create(Node.InfixOp);
-        node.* = Node.InfixOp{
+        node.* = .{
             .op_token = period,
             .lhs = global_error_set,
             .op = Node.InfixOp.Op.Period,
@@ -1281,7 +1317,7 @@ fn parsePrimaryTypeExpr(arena: *Allocator, it: *TokenIterator, tree: *Tree) !?*N
     if (eatToken(it, .Keyword_null)) |token| return createLiteral(arena, Node.NullLiteral, token);
     if (eatToken(it, .Keyword_anyframe)) |token| {
         const node = try arena.create(Node.AnyFrameType);
-        node.* = Node.AnyFrameType{
+        node.* = .{
             .anyframe_token = token,
             .result = null,
         };
@@ -2180,18 +2216,6 @@ fn parsePrefixOp(arena: *Allocator, it: *TokenIterator, tree: *Tree) !?*Node {
         .Ampersand => ops{ .AddressOf = {} },
         .Keyword_try => ops{ .Try = {} },
         .Keyword_await => ops{ .Await = .{} },
-        .Keyword_noasync => if (eatToken(it, .Keyword_await)) |await_tok| {
-            const node = try arena.create(Node.PrefixOp);
-            node.* = Node.PrefixOp{
-                .op_token = await_tok,
-                .op = .{ .Await = .{ .noasync_token = token.index } },
-                .rhs = undefined, // set by caller
-            };
-            return &node.base;
-        } else {
-            putBackToken(it, token.index);
-            return null;
-        },
         else => {
             putBackToken(it, token.index);
             return null;
diff --git a/lib/std/zig/parser_test.zig b/lib/std/zig/parser_test.zig
index 9a023bb525..d00568e49f 100644
--- a/lib/std/zig/parser_test.zig
+++ b/lib/std/zig/parser_test.zig
@@ -1,3 +1,14 @@
+test "zig fmt: noasync block" {
+    try testCanonical(
+        \\pub fn main() anyerror!void {
+        \\    noasync {
+        \\        var foo: Foo = .{ .bar = 42 };
+        \\    }
+        \\}
+        \\
+    );
+}
+
 test "zig fmt: noasync await" {
     try testCanonical(
         \\fn foo() void {
@@ -2798,7 +2809,7 @@ const maxInt = std.math.maxInt;
 var fixed_buffer_mem: [100 * 1024]u8 = undefined;
 
 fn testParse(source: []const u8, allocator: *mem.Allocator, anything_changed: *bool) ![]u8 {
-    const stderr = &io.getStdErr().outStream().stream;
+    const stderr = io.getStdErr().outStream();
 
     const tree = try std.zig.parse(allocator, source);
     defer tree.deinit();
@@ -2813,17 +2824,17 @@ fn testParse(source: []const u8, allocator: *mem.Allocator, anything_changed: *b
         {
             var i: usize = 0;
             while (i < loc.column) : (i += 1) {
-                try stderr.write(" ");
+                try stderr.writeAll(" ");
             }
         }
         {
             const caret_count = token.end - token.start;
             var i: usize = 0;
             while (i < caret_count) : (i += 1) {
-                try stderr.write("~");
+                try stderr.writeAll("~");
             }
         }
-        try stderr.write("\n");
+        try stderr.writeAll("\n");
     }
     if (tree.errors.len != 0) {
         return error.ParseError;
@@ -2832,8 +2843,7 @@ fn testParse(source: []const u8, allocator: *mem.Allocator, anything_changed: *b
     var buffer = try std.Buffer.initSize(allocator, 0);
     errdefer buffer.deinit();
 
-    var buffer_out_stream = io.BufferOutStream.init(&buffer);
-    anything_changed.* = try std.zig.render(allocator, &buffer_out_stream.stream, tree);
+    anything_changed.* = try std.zig.render(allocator, buffer.outStream(), tree);
     return buffer.toOwnedSlice();
 }
 
diff --git a/lib/std/zig/render.zig b/lib/std/zig/render.zig
index 625aef3131..1a221bd5b3 100644
--- a/lib/std/zig/render.zig
+++ b/lib/std/zig/render.zig
@@ -12,64 +12,58 @@ pub const Error = error{
 };
 
 /// Returns whether anything changed
-pub fn render(allocator: *mem.Allocator, stream: var, tree: *ast.Tree) (@TypeOf(stream).Child.Error || Error)!bool {
-    comptime assert(@typeInfo(@TypeOf(stream)) == .Pointer);
-
-    var anything_changed: bool = false;
-
+pub fn render(allocator: *mem.Allocator, stream: var, tree: *ast.Tree) (@TypeOf(stream).Error || Error)!bool {
     // make a passthrough stream that checks whether something changed
     const MyStream = struct {
         const MyStream = @This();
-        const StreamError = @TypeOf(stream).Child.Error;
-        const Stream = std.io.OutStream(StreamError);
+        const StreamError = @TypeOf(stream).Error;
 
-        anything_changed_ptr: *bool,
         child_stream: @TypeOf(stream),
-        stream: Stream,
+        anything_changed: bool,
         source_index: usize,
         source: []const u8,
 
-        fn write(iface_stream: *Stream, bytes: []const u8) StreamError!usize {
-            const self = @fieldParentPtr(MyStream, "stream", iface_stream);
-
-            if (!self.anything_changed_ptr.*) {
+        fn write(self: *MyStream, bytes: []const u8) StreamError!usize {
+            if (!self.anything_changed) {
                 const end = self.source_index + bytes.len;
                 if (end > self.source.len) {
-                    self.anything_changed_ptr.* = true;
+                    self.anything_changed = true;
                 } else {
                     const src_slice = self.source[self.source_index..end];
                     self.source_index += bytes.len;
                     if (!mem.eql(u8, bytes, src_slice)) {
-                        self.anything_changed_ptr.* = true;
+                        self.anything_changed = true;
                     }
                 }
             }
 
-            return self.child_stream.writeOnce(bytes);
+            return self.child_stream.write(bytes);
         }
     };
     var my_stream = MyStream{
-        .stream = MyStream.Stream{ .writeFn = MyStream.write },
         .child_stream = stream,
-        .anything_changed_ptr = &anything_changed,
+        .anything_changed = false,
         .source_index = 0,
         .source = tree.source,
     };
+    const my_stream_stream: std.io.OutStream(*MyStream, MyStream.StreamError, MyStream.write) = .{
+        .context = &my_stream,
+    };
 
-    try renderRoot(allocator, &my_stream.stream, tree);
+    try renderRoot(allocator, my_stream_stream, tree);
 
-    if (!anything_changed and my_stream.source_index != my_stream.source.len) {
-        anything_changed = true;
+    if (my_stream.source_index != my_stream.source.len) {
+        my_stream.anything_changed = true;
     }
 
-    return anything_changed;
+    return my_stream.anything_changed;
 }
 
 fn renderRoot(
     allocator: *mem.Allocator,
     stream: var,
     tree: *ast.Tree,
-) (@TypeOf(stream).Child.Error || Error)!void {
+) (@TypeOf(stream).Error || Error)!void {
     var tok_it = tree.tokens.iterator(0);
 
     // render all the line comments at the beginning of the file
@@ -189,7 +183,7 @@ fn renderRoot(
     }
 }
 
-fn renderExtraNewline(tree: *ast.Tree, stream: var, start_col: *usize, node: *ast.Node) @TypeOf(stream).Child.Error!void {
+fn renderExtraNewline(tree: *ast.Tree, stream: var, start_col: *usize, node: *ast.Node) @TypeOf(stream).Error!void {
     const first_token = node.firstToken();
     var prev_token = first_token;
     if (prev_token == 0) return;
@@ -204,11 +198,11 @@ fn renderExtraNewline(tree: *ast.Tree, stream: var, start_col: *usize, node: *as
     }
 }
 
-fn renderTopLevelDecl(allocator: *mem.Allocator, stream: var, tree: *ast.Tree, indent: usize, start_col: *usize, decl: *ast.Node) (@TypeOf(stream).Child.Error || Error)!void {
+fn renderTopLevelDecl(allocator: *mem.Allocator, stream: var, tree: *ast.Tree, indent: usize, start_col: *usize, decl: *ast.Node) (@TypeOf(stream).Error || Error)!void {
     try renderContainerDecl(allocator, stream, tree, indent, start_col, decl, .Newline);
 }
 
-fn renderContainerDecl(allocator: *mem.Allocator, stream: var, tree: *ast.Tree, indent: usize, start_col: *usize, decl: *ast.Node, space: Space) (@TypeOf(stream).Child.Error || Error)!void {
+fn renderContainerDecl(allocator: *mem.Allocator, stream: var, tree: *ast.Tree, indent: usize, start_col: *usize, decl: *ast.Node, space: Space) (@TypeOf(stream).Error || Error)!void {
     switch (decl.id) {
         .FnProto => {
             const fn_proto = @fieldParentPtr(ast.Node.FnProto, "base", decl);
@@ -343,7 +337,7 @@ fn renderExpression(
     start_col: *usize,
     base: *ast.Node,
     space: Space,
-) (@TypeOf(stream).Child.Error || Error)!void {
+) (@TypeOf(stream).Error || Error)!void {
     switch (base.id) {
         .Identifier => {
             const identifier = @fieldParentPtr(ast.Node.Identifier, "base", base);
@@ -390,6 +384,12 @@ fn renderExpression(
             try renderToken(tree, stream, comptime_node.comptime_token, indent, start_col, Space.Space);
             return renderExpression(allocator, stream, tree, indent, start_col, comptime_node.expr, space);
         },
+        .Noasync => {
+            const noasync_node = @fieldParentPtr(ast.Node.Noasync, "base", base);
+
+            try renderToken(tree, stream, noasync_node.noasync_token, indent, start_col, Space.Space);
+            return renderExpression(allocator, stream, tree, indent, start_col, noasync_node.expr, space);
+        },
 
         .Suspend => {
             const suspend_node = @fieldParentPtr(ast.Node.Suspend, "base", base);
@@ -443,9 +443,9 @@ fn renderExpression(
                     switch (op_tok_id) {
                         .Asterisk, .AsteriskAsterisk => try stream.writeByte('*'),
                         .LBracket => if (tree.tokens.at(prefix_op_node.op_token + 2).id == .Identifier)
-                            try stream.write("[*c")
+                            try stream.writeAll("[*c")
                         else
-                            try stream.write("[*"),
+                            try stream.writeAll("[*"),
                         else => unreachable,
                     }
                     if (ptr_info.sentinel) |sentinel| {
@@ -590,9 +590,6 @@ fn renderExpression(
                 },
 
                 .Await => |await_info| {
-                    if (await_info.noasync_token) |tok| {
-                        try renderToken(tree, stream, tok, indent, start_col, Space.Space);
-                    }
                     try renderToken(tree, stream, prefix_op_node.op_token, indent, start_col, Space.Space);
                 },
             }
@@ -754,7 +751,7 @@ fn renderExpression(
                         while (it.next()) |field_init| {
                             var find_stream = FindByteOutStream.init('\n');
                             var dummy_col: usize = 0;
-                            try renderExpression(allocator, &find_stream.stream, tree, 0, &dummy_col, field_init.*, Space.None);
+                            try renderExpression(allocator, find_stream.outStream(), tree, 0, &dummy_col, field_init.*, Space.None);
                             if (find_stream.byte_found) break :blk false;
                         }
                         break :blk true;
@@ -906,8 +903,7 @@ fn renderExpression(
                         var column_widths = widths[widths.len - row_size ..];
 
                         // Null stream for counting the printed length of each expression
-                        var null_stream = std.io.NullOutStream.init();
-                        var counting_stream = std.io.CountingOutStream(std.io.NullOutStream.Error).init(&null_stream.stream);
+                        var counting_stream = std.io.countingOutStream(std.io.null_out_stream);
 
                         var it = exprs.iterator(0);
                         var i: usize = 0;
@@ -915,7 +911,7 @@ fn renderExpression(
                         while (it.next()) |expr| : (i += 1) {
                             counting_stream.bytes_written = 0;
                             var dummy_col: usize = 0;
-                            try renderExpression(allocator, &counting_stream.stream, tree, indent, &dummy_col, expr.*, Space.None);
+                            try renderExpression(allocator, counting_stream.outStream(), tree, indent, &dummy_col, expr.*, Space.None);
                             const width = @intCast(usize, counting_stream.bytes_written);
                             const col = i % row_size;
                             column_widths[col] = std.math.max(column_widths[col], width);
@@ -1333,7 +1329,7 @@ fn renderExpression(
 
             // TODO: Remove condition after deprecating 'typeOf'. See https://github.com/ziglang/zig/issues/1348
             if (mem.eql(u8, tree.tokenSlicePtr(tree.tokens.at(builtin_call.builtin_token)), "@typeOf")) {
-                try stream.write("@TypeOf");
+                try stream.writeAll("@TypeOf");
             } else {
                 try renderToken(tree, stream, builtin_call.builtin_token, indent, start_col, Space.None); // @name
             }
@@ -1502,9 +1498,9 @@ fn renderExpression(
                 try renderExpression(allocator, stream, tree, indent, start_col, callconv_expr, Space.None);
                 try renderToken(tree, stream, callconv_rparen, indent, start_col, Space.Space); // )
             } else if (cc_rewrite_str) |str| {
-                try stream.write("callconv(");
-                try stream.write(mem.toSliceConst(u8, str));
-                try stream.write(") ");
+                try stream.writeAll("callconv(");
+                try stream.writeAll(mem.toSliceConst(u8, str));
+                try stream.writeAll(") ");
             }
 
             switch (fn_proto.return_type) {
@@ -1994,11 +1990,11 @@ fn renderExpression(
         .AsmInput => {
             const asm_input = @fieldParentPtr(ast.Node.AsmInput, "base", base);
 
-            try stream.write("[");
+            try stream.writeAll("[");
             try renderExpression(allocator, stream, tree, indent, start_col, asm_input.symbolic_name, Space.None);
-            try stream.write("] ");
+            try stream.writeAll("] ");
             try renderExpression(allocator, stream, tree, indent, start_col, asm_input.constraint, Space.None);
-            try stream.write(" (");
+            try stream.writeAll(" (");
             try renderExpression(allocator, stream, tree, indent, start_col, asm_input.expr, Space.None);
             return renderToken(tree, stream, asm_input.lastToken(), indent, start_col, space); // )
         },
@@ -2006,18 +2002,18 @@ fn renderExpression(
         .AsmOutput => {
             const asm_output = @fieldParentPtr(ast.Node.AsmOutput, "base", base);
 
-            try stream.write("[");
+            try stream.writeAll("[");
             try renderExpression(allocator, stream, tree, indent, start_col, asm_output.symbolic_name, Space.None);
-            try stream.write("] ");
+            try stream.writeAll("] ");
             try renderExpression(allocator, stream, tree, indent, start_col, asm_output.constraint, Space.None);
-            try stream.write(" (");
+            try stream.writeAll(" (");
 
             switch (asm_output.kind) {
                 ast.Node.AsmOutput.Kind.Variable => |variable_name| {
                     try renderExpression(allocator, stream, tree, indent, start_col, &variable_name.base, Space.None);
                 },
                 ast.Node.AsmOutput.Kind.Return => |return_type| {
-                    try stream.write("-> ");
+                    try stream.writeAll("-> ");
                     try renderExpression(allocator, stream, tree, indent, start_col, return_type, Space.None);
                 },
             }
@@ -2049,7 +2045,7 @@ fn renderVarDecl(
     indent: usize,
     start_col: *usize,
     var_decl: *ast.Node.VarDecl,
-) (@TypeOf(stream).Child.Error || Error)!void {
+) (@TypeOf(stream).Error || Error)!void {
     if (var_decl.visib_token) |visib_token| {
         try renderToken(tree, stream, visib_token, indent, start_col, Space.Space); // pub
     }
@@ -2122,7 +2118,7 @@ fn renderParamDecl(
     start_col: *usize,
     base: *ast.Node,
     space: Space,
-) (@TypeOf(stream).Child.Error || Error)!void {
+) (@TypeOf(stream).Error || Error)!void {
     const param_decl = @fieldParentPtr(ast.Node.ParamDecl, "base", base);
 
     try renderDocComments(tree, stream, param_decl, indent, start_col);
@@ -2151,7 +2147,7 @@ fn renderStatement(
     indent: usize,
     start_col: *usize,
     base: *ast.Node,
-) (@TypeOf(stream).Child.Error || Error)!void {
+) (@TypeOf(stream).Error || Error)!void {
     switch (base.id) {
         .VarDecl => {
             const var_decl = @fieldParentPtr(ast.Node.VarDecl, "base", base);
@@ -2190,7 +2186,7 @@ fn renderTokenOffset(
     start_col: *usize,
     space: Space,
     token_skip_bytes: usize,
-) (@TypeOf(stream).Child.Error || Error)!void {
+) (@TypeOf(stream).Error || Error)!void {
     if (space == Space.BlockStart) {
         if (start_col.* < indent + indent_delta)
             return renderToken(tree, stream, token_index, indent, start_col, Space.Space);
@@ -2201,7 +2197,7 @@ fn renderTokenOffset(
     }
 
     var token = tree.tokens.at(token_index);
-    try stream.write(mem.trimRight(u8, tree.tokenSlicePtr(token)[token_skip_bytes..], " "));
+    try stream.writeAll(mem.trimRight(u8, tree.tokenSlicePtr(token)[token_skip_bytes..], " "));
 
     if (space == Space.NoComment)
         return;
@@ -2211,15 +2207,15 @@ fn renderTokenOffset(
     if (space == Space.Comma) switch (next_token.id) {
         .Comma => return renderToken(tree, stream, token_index + 1, indent, start_col, Space.Newline),
         .LineComment => {
-            try stream.write(", ");
+            try stream.writeAll(", ");
             return renderToken(tree, stream, token_index + 1, indent, start_col, Space.Newline);
         },
         else => {
             if (token_index + 2 < tree.tokens.len and tree.tokens.at(token_index + 2).id == .MultilineStringLiteralLine) {
-                try stream.write(",");
+                try stream.writeAll(",");
                 return;
             } else {
-                try stream.write(",\n");
+                try stream.writeAll(",\n");
                 start_col.* = 0;
                 return;
             }
@@ -2243,7 +2239,7 @@ fn renderTokenOffset(
                 if (next_token.id == .MultilineStringLiteralLine) {
                     return;
                 } else {
-                    try stream.write("\n");
+                    try stream.writeAll("\n");
                     start_col.* = 0;
                     return;
                 }
@@ -2306,7 +2302,7 @@ fn renderTokenOffset(
                     if (next_token.id == .MultilineStringLiteralLine) {
                         return;
                     } else {
-                        try stream.write("\n");
+                        try stream.writeAll("\n");
                         start_col.* = 0;
                         return;
                     }
@@ -2324,7 +2320,7 @@ fn renderTokenOffset(
         const newline_count = if (loc.line == 1) @as(u8, 1) else @as(u8, 2);
         try stream.writeByteNTimes('\n', newline_count);
         try stream.writeByteNTimes(' ', indent);
-        try stream.write(mem.trimRight(u8, tree.tokenSlicePtr(next_token), " "));
+        try stream.writeAll(mem.trimRight(u8, tree.tokenSlicePtr(next_token), " "));
 
         offset += 1;
         token = next_token;
@@ -2335,7 +2331,7 @@ fn renderTokenOffset(
                     if (next_token.id == .MultilineStringLiteralLine) {
                         return;
                     } else {
-                        try stream.write("\n");
+                        try stream.writeAll("\n");
                         start_col.* = 0;
                         return;
                     }
@@ -2378,7 +2374,7 @@ fn renderToken(
     indent: usize,
     start_col: *usize,
     space: Space,
-) (@TypeOf(stream).Child.Error || Error)!void {
+) (@TypeOf(stream).Error || Error)!void {
     return renderTokenOffset(tree, stream, token_index, indent, start_col, space, 0);
 }
 
@@ -2388,7 +2384,7 @@ fn renderDocComments(
     node: var,
     indent: usize,
     start_col: *usize,
-) (@TypeOf(stream).Child.Error || Error)!void {
+) (@TypeOf(stream).Error || Error)!void {
     const comment = node.doc_comments orelse return;
     var it = comment.lines.iterator(0);
     const first_token = node.firstToken();
@@ -2398,7 +2394,7 @@ fn renderDocComments(
             try stream.writeByteNTimes(' ', indent);
         } else {
             try renderToken(tree, stream, line_token_index.*, indent, start_col, Space.NoComment);
-            try stream.write("\n");
+            try stream.writeAll("\n");
             try stream.writeByteNTimes(' ', indent);
         }
     }
@@ -2424,27 +2420,23 @@ fn nodeCausesSliceOpSpace(base: *ast.Node) bool {
     };
 }
 
-// An OutStream that returns whether the given character has been written to it.
-// The contents are not written to anything.
+/// A `std.io.OutStream` that returns whether the given character has been written to it.
+/// The contents are not written to anything.
 const FindByteOutStream = struct {
-    const Self = FindByteOutStream;
-    pub const Error = error{};
-    pub const Stream = std.io.OutStream(Error);
-
-    stream: Stream,
     byte_found: bool,
     byte: u8,
 
-    pub fn init(byte: u8) Self {
-        return Self{
-            .stream = Stream{ .writeFn = writeFn },
+    pub const Error = error{};
+    pub const OutStream = std.io.OutStream(*FindByteOutStream, Error, write);
+
+    pub fn init(byte: u8) FindByteOutStream {
+        return FindByteOutStream{
             .byte = byte,
             .byte_found = false,
         };
     }
 
-    fn writeFn(out_stream: *Stream, bytes: []const u8) Error!usize {
-        const self = @fieldParentPtr(Self, "stream", out_stream);
+    pub fn write(self: *FindByteOutStream, bytes: []const u8) Error!usize {
         if (self.byte_found) return bytes.len;
         self.byte_found = blk: {
             for (bytes) |b|
@@ -2453,11 +2445,15 @@ const FindByteOutStream = struct {
         };
         return bytes.len;
     }
+
+    pub fn outStream(self: *FindByteOutStream) OutStream {
+        return .{ .context = self };
+    }
 };
 
-fn copyFixingWhitespace(stream: var, slice: []const u8) @TypeOf(stream).Child.Error!void {
+fn copyFixingWhitespace(stream: var, slice: []const u8) @TypeOf(stream).Error!void {
     for (slice) |byte| switch (byte) {
-        '\t' => try stream.write("    "),
+        '\t' => try stream.writeAll("    "),
         '\r' => {},
         else => try stream.writeByte(byte),
     };
diff --git a/lib/std/zig/system.zig b/lib/std/zig/system.zig
index a4e065e184..88b3022bb2 100644
--- a/lib/std/zig/system.zig
+++ b/lib/std/zig/system.zig
@@ -201,8 +201,15 @@ pub const NativeTargetInfo = struct {
             switch (Target.current.os.tag) {
                 .linux => {
                     const uts = std.os.uname();
-                    const release = mem.toSliceConst(u8, @ptrCast([*:0]const u8, &uts.release));
-                    if (std.builtin.Version.parse(release)) |ver| {
+                    const release = mem.toSliceConst(u8, &uts.release);
+                    // The release field may have several other fields after the
+                    // kernel version
+                    const kernel_version = if (mem.indexOfScalar(u8, release, '-')) |pos|
+                        release[0..pos]
+                    else
+                        release;
+
+                    if (std.builtin.Version.parse(kernel_version)) |ver| {
                         os.version_range.linux.range.min = ver;
                         os.version_range.linux.range.max = ver;
                     } else |err| switch (err) {
@@ -318,22 +325,19 @@ pub const NativeTargetInfo = struct {
         // native CPU architecture as being different than the current target), we use this:
         const cpu_arch = cross_target.getCpuArch();
 
-        const cpu = switch (cross_target.cpu_model) {
+        var cpu = switch (cross_target.cpu_model) {
             .native => detectNativeCpuAndFeatures(cpu_arch, os, cross_target),
-            .baseline => baselineCpuAndFeatures(cpu_arch, cross_target),
+            .baseline => Target.Cpu.baseline(cpu_arch),
             .determined_by_cpu_arch => if (cross_target.cpu_arch == null)
                 detectNativeCpuAndFeatures(cpu_arch, os, cross_target)
             else
-                baselineCpuAndFeatures(cpu_arch, cross_target),
-            .explicit => |model| blk: {
-                var adjusted_model = model.toCpu(cpu_arch);
-                cross_target.updateCpuFeatures(&adjusted_model.features);
-                break :blk adjusted_model;
-            },
+                Target.Cpu.baseline(cpu_arch),
+            .explicit => |model| model.toCpu(cpu_arch),
         } orelse backup_cpu_detection: {
             cpu_detection_unimplemented = true;
-            break :backup_cpu_detection baselineCpuAndFeatures(cpu_arch, cross_target);
+            break :backup_cpu_detection Target.Cpu.baseline(cpu_arch);
         };
+        cross_target.updateCpuFeatures(&cpu.features);
 
         var target = try detectAbiAndDynamicLinker(allocator, cpu, os, cross_target);
         target.cpu_detection_unimplemented = cpu_detection_unimplemented;
@@ -563,7 +567,7 @@ pub const NativeTargetInfo = struct {
         cross_target: CrossTarget,
     ) AbiAndDynamicLinkerFromFileError!NativeTargetInfo {
         var hdr_buf: [@sizeOf(elf.Elf64_Ehdr)]u8 align(@alignOf(elf.Elf64_Ehdr)) = undefined;
-        _ = try preadFull(file, &hdr_buf, 0, hdr_buf.len);
+        _ = try preadMin(file, &hdr_buf, 0, hdr_buf.len);
         const hdr32 = @ptrCast(*elf.Elf32_Ehdr, &hdr_buf);
         const hdr64 = @ptrCast(*elf.Elf64_Ehdr, &hdr_buf);
         if (!mem.eql(u8, hdr32.e_ident[0..4], "\x7fELF")) return error.InvalidElfMagic;
@@ -603,7 +607,7 @@ pub const NativeTargetInfo = struct {
             // Reserve some bytes so that we can deref the 64-bit struct fields
             // even when the ELF file is 32-bits.
             const ph_reserve: usize = @sizeOf(elf.Elf64_Phdr) - @sizeOf(elf.Elf32_Phdr);
-            const ph_read_byte_len = try preadFull(file, ph_buf[0 .. ph_buf.len - ph_reserve], phoff, phentsize);
+            const ph_read_byte_len = try preadMin(file, ph_buf[0 .. ph_buf.len - ph_reserve], phoff, phentsize);
             var ph_buf_i: usize = 0;
             while (ph_buf_i < ph_read_byte_len and ph_i < phnum) : ({
                 ph_i += 1;
@@ -618,7 +622,7 @@ pub const NativeTargetInfo = struct {
                         const p_offset = elfInt(is_64, need_bswap, ph32.p_offset, ph64.p_offset);
                         const p_filesz = elfInt(is_64, need_bswap, ph32.p_filesz, ph64.p_filesz);
                         if (p_filesz > result.dynamic_linker.buffer.len) return error.NameTooLong;
-                        _ = try preadFull(file, result.dynamic_linker.buffer[0..p_filesz], p_offset, p_filesz);
+                        _ = try preadMin(file, result.dynamic_linker.buffer[0..p_filesz], p_offset, p_filesz);
                         // PT_INTERP includes a null byte in p_filesz.
                         const len = p_filesz - 1;
                         // dynamic_linker.max_byte is "max", not "len".
@@ -649,7 +653,7 @@ pub const NativeTargetInfo = struct {
                             // Reserve some bytes so that we can deref the 64-bit struct fields
                             // even when the ELF file is 32-bits.
                             const dyn_reserve: usize = @sizeOf(elf.Elf64_Dyn) - @sizeOf(elf.Elf32_Dyn);
-                            const dyn_read_byte_len = try preadFull(
+                            const dyn_read_byte_len = try preadMin(
                                 file,
                                 dyn_buf[0 .. dyn_buf.len - dyn_reserve],
                                 dyn_off,
@@ -694,14 +698,14 @@ pub const NativeTargetInfo = struct {
                 var sh_buf: [16 * @sizeOf(elf.Elf64_Shdr)]u8 align(@alignOf(elf.Elf64_Shdr)) = undefined;
                 if (sh_buf.len < shentsize) return error.InvalidElfFile;
 
-                _ = try preadFull(file, &sh_buf, str_section_off, shentsize);
+                _ = try preadMin(file, &sh_buf, str_section_off, shentsize);
                 const shstr32 = @ptrCast(*elf.Elf32_Shdr, @alignCast(@alignOf(elf.Elf32_Shdr), &sh_buf));
                 const shstr64 = @ptrCast(*elf.Elf64_Shdr, @alignCast(@alignOf(elf.Elf64_Shdr), &sh_buf));
                 const shstrtab_off = elfInt(is_64, need_bswap, shstr32.sh_offset, shstr64.sh_offset);
                 const shstrtab_size = elfInt(is_64, need_bswap, shstr32.sh_size, shstr64.sh_size);
                 var strtab_buf: [4096:0]u8 = undefined;
                 const shstrtab_len = std.math.min(shstrtab_size, strtab_buf.len);
-                const shstrtab_read_len = try preadFull(file, &strtab_buf, shstrtab_off, shstrtab_len);
+                const shstrtab_read_len = try preadMin(file, &strtab_buf, shstrtab_off, shstrtab_len);
                 const shstrtab = strtab_buf[0..shstrtab_read_len];
 
                 const shnum = elfInt(is_64, need_bswap, hdr32.e_shnum, hdr64.e_shnum);
@@ -710,7 +714,7 @@ pub const NativeTargetInfo = struct {
                     // Reserve some bytes so that we can deref the 64-bit struct fields
                     // even when the ELF file is 32-bits.
                     const sh_reserve: usize = @sizeOf(elf.Elf64_Shdr) - @sizeOf(elf.Elf32_Shdr);
-                    const sh_read_byte_len = try preadFull(
+                    const sh_read_byte_len = try preadMin(
                         file,
                         sh_buf[0 .. sh_buf.len - sh_reserve],
                         shoff,
@@ -744,7 +748,7 @@ pub const NativeTargetInfo = struct {
 
                 if (dynstr) |ds| {
                     const strtab_len = std.math.min(ds.size, strtab_buf.len);
-                    const strtab_read_len = try preadFull(file, &strtab_buf, ds.offset, shstrtab_len);
+                    const strtab_read_len = try preadMin(file, &strtab_buf, ds.offset, shstrtab_len);
                     const strtab = strtab_buf[0..strtab_read_len];
                     // TODO this pointer cast should not be necessary
                     const rpath_list = mem.toSliceConst(u8, @ptrCast([*:0]u8, strtab[rpoff..].ptr));
@@ -806,7 +810,7 @@ pub const NativeTargetInfo = struct {
         return result;
     }
 
-    fn preadFull(file: fs.File, buf: []u8, offset: u64, min_read_len: usize) !usize {
+    fn preadMin(file: fs.File, buf: []u8, offset: u64, min_read_len: usize) !usize {
         var i: u64 = 0;
         while (i < min_read_len) {
             const len = file.pread(buf[i .. buf.len - i], offset + i) catch |err| switch (err) {
@@ -846,7 +850,7 @@ pub const NativeTargetInfo = struct {
         abi: Target.Abi,
     };
 
-    fn elfInt(is_64: bool, need_bswap: bool, int_32: var, int_64: var) @TypeOf(int_64) {
+    pub fn elfInt(is_64: bool, need_bswap: bool, int_32: var, int_64: var) @TypeOf(int_64) {
         if (is_64) {
             if (need_bswap) {
                 return @byteSwap(@TypeOf(int_64), int_64);
@@ -877,10 +881,4 @@ pub const NativeTargetInfo = struct {
             },
         }
     }
-
-    fn baselineCpuAndFeatures(cpu_arch: Target.Cpu.Arch, cross_target: CrossTarget) Target.Cpu {
-        var adjusted_baseline = Target.Cpu.baseline(cpu_arch);
-        cross_target.updateCpuFeatures(&adjusted_baseline.features);
-        return adjusted_baseline;
-    }
 };
diff --git a/lib/std/zig/system/x86.zig b/lib/std/zig/system/x86.zig
index b7d2c6a227..b4964596d2 100644
--- a/lib/std/zig/system/x86.zig
+++ b/lib/std/zig/system/x86.zig
@@ -2,6 +2,12 @@ const std = @import("std");
 const Target = std.Target;
 const CrossTarget = std.zig.CrossTarget;
 
+const XCR0_XMM = 0x02;
+const XCR0_YMM = 0x04;
+const XCR0_MASKREG = 0x20;
+const XCR0_ZMM0_15 = 0x40;
+const XCR0_ZMM16_31 = 0x80;
+
 fn setFeature(cpu: *Target.Cpu, feature: Target.x86.Feature, enabled: bool) void {
     const idx = @as(Target.Cpu.Feature.Set.Index, @enumToInt(feature));
 
@@ -12,6 +18,10 @@ inline fn bit(input: u32, offset: u5) bool {
     return (input >> offset) & 1 != 0;
 }
 
+inline fn hasMask(input: u32, mask: u32) bool {
+    return (input & mask) == mask;
+}
+
 pub fn detectNativeCpuAndFeatures(arch: Target.Cpu.Arch, os: Target.Os, cross_target: CrossTarget) Target.Cpu {
     var cpu = Target.Cpu{
         .arch = arch,
@@ -30,18 +40,15 @@ pub fn detectNativeCpuAndFeatures(arch: Target.Cpu.Arch, os: Target.Os, cross_ta
         leaf = cpuid(0x1, 0);
 
         const brand_id = leaf.ebx & 0xff;
-        var family: u32 = 0;
-        var model: u32 = 0;
 
-        { // Detect model and family
-            family = (leaf.eax >> 8) & 0xf;
-            model = (leaf.eax >> 4) & 0xf;
-            if (family == 6 or family == 0xf) {
-                if (family == 0xf) {
-                    family += (leaf.eax >> 20) & 0xff;
-                }
-                model += ((leaf.eax >> 16) & 0xf) << 4;
+        // Detect model and family
+        var family = (leaf.eax >> 8) & 0xf;
+        var model = (leaf.eax >> 4) & 0xf;
+        if (family == 6 or family == 0xf) {
+            if (family == 0xf) {
+                family += (leaf.eax >> 20) & 0xff;
             }
+            model += ((leaf.eax >> 16) & 0xf) << 4;
         }
 
         // Now we detect the model.
@@ -312,7 +319,6 @@ fn detectNativeFeatures(cpu: *Target.Cpu, os_tag: Target.Os.Tag) void {
 
     leaf = cpuid(1, 0);
 
-    setFeature(cpu, .cx8, bit(leaf.edx, 8));
     setFeature(cpu, .cx8, bit(leaf.edx, 8));
     setFeature(cpu, .cmov, bit(leaf.edx, 15));
     setFeature(cpu, .mmx, bit(leaf.edx, 23));
@@ -330,11 +336,13 @@ fn detectNativeFeatures(cpu: *Target.Cpu, os_tag: Target.Os.Tag) void {
     setFeature(cpu, .aes, bit(leaf.ecx, 25));
     setFeature(cpu, .rdrnd, bit(leaf.ecx, 30));
 
-    leaf.eax = getXCR0();
+    const has_xsave = bit(leaf.ecx, 27);
+    const has_avx = bit(leaf.ecx, 28);
 
-    const has_avx = bit(leaf.ecx, 27) and
-        bit(leaf.ecx, 28) and
-        ((leaf.eax & 0x6) == 0x6);
+    // Make sure not to call xgetbv if xsave is not supported
+    const xcr0_eax = if (has_xsave and has_avx) getXCR0() else 0;
+
+    const has_avx_save = hasMask(xcr0_eax, XCR0_XMM | XCR0_YMM);
 
     // LLVM approaches avx512_save by hardcoding it to true on Darwin,
     // because the kernel saves the context even if the bit is not set.
@@ -358,14 +366,14 @@ fn detectNativeFeatures(cpu: *Target.Cpu, os_tag: Target.Os.Tag) void {
     // set right now.
     const has_avx512_save = switch (os_tag.isDarwin()) {
         true => true,
-        false => has_avx and ((leaf.eax & 0xE0) == 0xE0),
+        false => hasMask(xcr0_eax, XCR0_MASKREG | XCR0_ZMM0_15 | XCR0_ZMM16_31),
     };
 
-    setFeature(cpu, .avx, has_avx);
-    setFeature(cpu, .fma, has_avx and bit(leaf.ecx, 12));
+    setFeature(cpu, .avx, has_avx_save);
+    setFeature(cpu, .fma, has_avx_save and bit(leaf.ecx, 12));
     // Only enable XSAVE if OS has enabled support for saving YMM state.
-    setFeature(cpu, .xsave, has_avx and bit(leaf.ecx, 26));
-    setFeature(cpu, .f16c, has_avx and bit(leaf.ecx, 29));
+    setFeature(cpu, .xsave, has_avx_save and bit(leaf.ecx, 26));
+    setFeature(cpu, .f16c, has_avx_save and bit(leaf.ecx, 29));
 
     leaf = cpuid(0x80000000, 0);
     const max_ext_level = leaf.eax;
@@ -376,9 +384,9 @@ fn detectNativeFeatures(cpu: *Target.Cpu, os_tag: Target.Os.Tag) void {
         setFeature(cpu, .lzcnt, bit(leaf.ecx, 5));
         setFeature(cpu, .sse4a, bit(leaf.ecx, 6));
         setFeature(cpu, .prfchw, bit(leaf.ecx, 8));
-        setFeature(cpu, .xop, bit(leaf.ecx, 11) and has_avx);
+        setFeature(cpu, .xop, bit(leaf.ecx, 11) and has_avx_save);
         setFeature(cpu, .lwp, bit(leaf.ecx, 15));
-        setFeature(cpu, .fma4, bit(leaf.ecx, 16) and has_avx);
+        setFeature(cpu, .fma4, bit(leaf.ecx, 16) and has_avx_save);
         setFeature(cpu, .tbm, bit(leaf.ecx, 21));
         setFeature(cpu, .mwaitx, bit(leaf.ecx, 29));
         setFeature(cpu, .@"64bit", bit(leaf.edx, 29));
@@ -409,7 +417,7 @@ fn detectNativeFeatures(cpu: *Target.Cpu, os_tag: Target.Os.Tag) void {
         setFeature(cpu, .sgx, bit(leaf.ebx, 2));
         setFeature(cpu, .bmi, bit(leaf.ebx, 3));
         // AVX2 is only supported if we have the OS save support from AVX.
-        setFeature(cpu, .avx2, bit(leaf.ebx, 5) and has_avx);
+        setFeature(cpu, .avx2, bit(leaf.ebx, 5) and has_avx_save);
         setFeature(cpu, .bmi2, bit(leaf.ebx, 8));
         setFeature(cpu, .invpcid, bit(leaf.ebx, 10));
         setFeature(cpu, .rtm, bit(leaf.ebx, 11));
@@ -435,8 +443,8 @@ fn detectNativeFeatures(cpu: *Target.Cpu, os_tag: Target.Os.Tag) void {
         setFeature(cpu, .avx512vbmi2, bit(leaf.ecx, 6) and has_avx512_save);
         setFeature(cpu, .shstk, bit(leaf.ecx, 7));
         setFeature(cpu, .gfni, bit(leaf.ecx, 8));
-        setFeature(cpu, .vaes, bit(leaf.ecx, 9) and has_avx);
-        setFeature(cpu, .vpclmulqdq, bit(leaf.ecx, 10) and has_avx);
+        setFeature(cpu, .vaes, bit(leaf.ecx, 9) and has_avx_save);
+        setFeature(cpu, .vpclmulqdq, bit(leaf.ecx, 10) and has_avx_save);
         setFeature(cpu, .avx512vnni, bit(leaf.ecx, 11) and has_avx512_save);
         setFeature(cpu, .avx512bitalg, bit(leaf.ecx, 12) and has_avx512_save);
         setFeature(cpu, .avx512vpopcntdq, bit(leaf.ecx, 14) and has_avx512_save);
@@ -487,7 +495,7 @@ fn detectNativeFeatures(cpu: *Target.Cpu, os_tag: Target.Os.Tag) void {
         }
     }
 
-    if (max_level >= 0xD and has_avx) {
+    if (max_level >= 0xD and has_avx_save) {
         leaf = cpuid(0xD, 0x1);
         // Only enable XSAVE if OS has enabled support for saving YMM state.
         setFeature(cpu, .xsaveopt, bit(leaf.eax, 0));
@@ -518,32 +526,32 @@ fn cpuid(leaf_id: u32, subid: u32) CpuidLeaf {
     // Workaround for https://github.com/ziglang/zig/issues/215
     // Inline assembly in zig only supports one output,
     // so we pass a pointer to the struct.
-    var cpuid_leaf = CpuidLeaf{ .eax = 0, .ebx = 0, .ecx = 0, .edx = 0 };
-    const leaf_ptr = &cpuid_leaf;
+    var cpuid_leaf: CpuidLeaf = undefined;
 
     // valid for both x86 and x86_64
     asm volatile (
         \\ cpuid
-        \\ movl %%eax, (%[leaf_ptr])
+        \\ movl %%eax, 0(%[leaf_ptr])
         \\ movl %%ebx, 4(%[leaf_ptr])
         \\ movl %%ecx, 8(%[leaf_ptr])
         \\ movl %%edx, 12(%[leaf_ptr])
         :
         : [leaf_id] "{eax}" (leaf_id),
           [subid] "{ecx}" (subid),
-          [leaf_ptr] "r" (leaf_ptr)
+          [leaf_ptr] "r" (&cpuid_leaf)
         : "eax", "ebx", "ecx", "edx"
     );
+
     return cpuid_leaf;
 }
 
 // Read control register 0 (XCR0). Used to detect features such as AVX.
 fn getXCR0() u32 {
-    return asm (
-        \\ .byte 0x0F, 0x01, 0xD0
+    return asm volatile (
+        \\ xor %%ecx, %%ecx
+        \\ xgetbv
         : [ret] "={eax}" (-> u32)
-        : [number] "{eax}" (@as(u32, 0)),
-          [number] "{edx}" (@as(u32, 0)),
-          [number] "{ecx}" (@as(u32, 0))
+        :
+        : "eax", "edx", "ecx"
     );
 }
diff --git a/src-self-hosted/clang.zig b/src-self-hosted/clang.zig
index 8a30fb99f3..ac9239fcbc 100644
--- a/src-self-hosted/clang.zig
+++ b/src-self-hosted/clang.zig
@@ -787,6 +787,7 @@ pub extern fn ZigClangTagDecl_isThisDeclarationADefinition(self: *const ZigClang
 pub extern fn ZigClangEnumType_getDecl(record_ty: ?*const struct_ZigClangEnumType) *const struct_ZigClangEnumDecl;
 pub extern fn ZigClangRecordDecl_getCanonicalDecl(record_decl: ?*const struct_ZigClangRecordDecl) ?*const struct_ZigClangTagDecl;
 pub extern fn ZigClangFieldDecl_getCanonicalDecl(field_decl: ?*const struct_ZigClangFieldDecl) ?*const struct_ZigClangFieldDecl;
+pub extern fn ZigClangFieldDecl_getAlignedAttribute(field_decl: ?*const struct_ZigClangFieldDecl, *const ZigClangASTContext) c_uint;
 pub extern fn ZigClangEnumDecl_getCanonicalDecl(self: ?*const struct_ZigClangEnumDecl) ?*const struct_ZigClangTagDecl;
 pub extern fn ZigClangTypedefNameDecl_getCanonicalDecl(self: ?*const struct_ZigClangTypedefNameDecl) ?*const struct_ZigClangTypedefNameDecl;
 pub extern fn ZigClangFunctionDecl_getCanonicalDecl(self: ?*const struct_ZigClangFunctionDecl) ?*const struct_ZigClangFunctionDecl;
@@ -834,6 +835,7 @@ pub extern fn ZigClangType_getPointeeType(self: ?*const struct_ZigClangType) str
 pub extern fn ZigClangType_isVoidType(self: ?*const struct_ZigClangType) bool;
 pub extern fn ZigClangType_isConstantArrayType(self: ?*const struct_ZigClangType) bool;
 pub extern fn ZigClangType_isRecordType(self: ?*const struct_ZigClangType) bool;
+pub extern fn ZigClangType_isIncompleteOrZeroLengthArrayType(self: ?*const struct_ZigClangType, *const ZigClangASTContext) bool;
 pub extern fn ZigClangType_isArrayType(self: ?*const struct_ZigClangType) bool;
 pub extern fn ZigClangType_isBooleanType(self: ?*const struct_ZigClangType) bool;
 pub extern fn ZigClangType_getTypeClassName(self: *const struct_ZigClangType) [*:0]const u8;
diff --git a/src-self-hosted/dep_tokenizer.zig b/src-self-hosted/dep_tokenizer.zig
index 5c250cdb99..e0c67694e1 100644
--- a/src-self-hosted/dep_tokenizer.zig
+++ b/src-self-hosted/dep_tokenizer.zig
@@ -306,12 +306,12 @@ pub const Tokenizer = struct {
 
     fn errorPosition(self: *Tokenizer, position: usize, bytes: []const u8, comptime fmt: []const u8, args: var) Error {
         var buffer = try std.Buffer.initSize(&self.arena.allocator, 0);
-        std.fmt.format(&buffer, anyerror, std.Buffer.append, fmt, args) catch {};
+        try buffer.outStream().print(fmt, args);
         try buffer.append(" '");
         var out = makeOutput(std.Buffer.append, &buffer);
         try printCharValues(&out, bytes);
         try buffer.append("'");
-        std.fmt.format(&buffer, anyerror, std.Buffer.append, " at position {}", .{position - (bytes.len - 1)}) catch {};
+        try buffer.outStream().print(" at position {}", .{position - (bytes.len - 1)});
         self.error_text = buffer.toSlice();
         return Error.InvalidInput;
     }
@@ -319,10 +319,9 @@ pub const Tokenizer = struct {
     fn errorIllegalChar(self: *Tokenizer, position: usize, char: u8, comptime fmt: []const u8, args: var) Error {
         var buffer = try std.Buffer.initSize(&self.arena.allocator, 0);
         try buffer.append("illegal char ");
-        var out = makeOutput(std.Buffer.append, &buffer);
-        try printUnderstandableChar(&out, char);
-        std.fmt.format(&buffer, anyerror, std.Buffer.append, " at position {}", .{position}) catch {};
-        if (fmt.len != 0) std.fmt.format(&buffer, anyerror, std.Buffer.append, ": " ++ fmt, args) catch {};
+        try printUnderstandableChar(&buffer, char);
+        try buffer.outStream().print(" at position {}", .{position});
+        if (fmt.len != 0) try buffer.outStream().print(": " ++ fmt, args);
         self.error_text = buffer.toSlice();
         return Error.InvalidInput;
     }
@@ -996,14 +995,13 @@ fn printCharValues(out: var, bytes: []const u8) !void {
     }
 }
 
-fn printUnderstandableChar(out: var, char: u8) !void {
+fn printUnderstandableChar(buffer: *std.Buffer, char: u8) !void {
     if (!std.ascii.isPrint(char) or char == ' ') {
-        const output = @typeInfo(@TypeOf(out)).Pointer.child.output;
-        std.fmt.format(out.context, anyerror, output, "\\x{X:2}", .{char}) catch {};
+        try buffer.outStream().print("\\x{X:2}", .{char});
     } else {
-        try out.write("'");
-        try out.write(&[_]u8{printable_char_tab[char]});
-        try out.write("'");
+        try buffer.append("'");
+        try buffer.appendByte(printable_char_tab[char]);
+        try buffer.append("'");
     }
 }
 
diff --git a/src-self-hosted/libc_installation.zig b/src-self-hosted/libc_installation.zig
index 41def38126..c07ef03b51 100644
--- a/src-self-hosted/libc_installation.zig
+++ b/src-self-hosted/libc_installation.zig
@@ -17,7 +17,6 @@ pub const LibCInstallation = struct {
     include_dir: ?[:0]const u8 = null,
     sys_include_dir: ?[:0]const u8 = null,
     crt_dir: ?[:0]const u8 = null,
-    static_crt_dir: ?[:0]const u8 = null,
     msvc_lib_dir: ?[:0]const u8 = null,
     kernel32_lib_dir: ?[:0]const u8 = null,
 
@@ -38,7 +37,7 @@ pub const LibCInstallation = struct {
     pub fn parse(
         allocator: *Allocator,
         libc_file: []const u8,
-        stderr: *std.io.OutStream(fs.File.WriteError),
+        stderr: var,
     ) !LibCInstallation {
         var self: LibCInstallation = .{};
 
@@ -98,13 +97,6 @@ pub const LibCInstallation = struct {
             try stderr.print("crt_dir may not be empty for {}\n", .{@tagName(Target.current.os.tag)});
             return error.ParseError;
         }
-        if (self.static_crt_dir == null and is_windows and is_gnu) {
-            try stderr.print("static_crt_dir may not be empty for {}-{}\n", .{
-                @tagName(Target.current.os.tag),
-                @tagName(Target.current.abi),
-            });
-            return error.ParseError;
-        }
         if (self.msvc_lib_dir == null and is_windows and !is_gnu) {
             try stderr.print("msvc_lib_dir may not be empty for {}-{}\n", .{
                 @tagName(Target.current.os.tag),
@@ -123,12 +115,11 @@ pub const LibCInstallation = struct {
         return self;
     }
 
-    pub fn render(self: LibCInstallation, out: *std.io.OutStream(fs.File.WriteError)) !void {
+    pub fn render(self: LibCInstallation, out: var) !void {
         @setEvalBranchQuota(4000);
         const include_dir = self.include_dir orelse "";
         const sys_include_dir = self.sys_include_dir orelse "";
         const crt_dir = self.crt_dir orelse "";
-        const static_crt_dir = self.static_crt_dir orelse "";
         const msvc_lib_dir = self.msvc_lib_dir orelse "";
         const kernel32_lib_dir = self.kernel32_lib_dir orelse "";
 
@@ -147,11 +138,6 @@ pub const LibCInstallation = struct {
             \\# Not needed when targeting MacOS.
             \\crt_dir={}
             \\
-            \\# The directory that contains `crtbegin.o`.
-            \\# On POSIX, can be found with `cc -print-file-name=crtbegin.o`.
-            \\# Only needed when targeting MinGW-w64 on Windows.
-            \\static_crt_dir={}
-            \\
             \\# The directory that contains `vcruntime.lib`.
             \\# Only needed when targeting MSVC on Windows.
             \\msvc_lib_dir={}
@@ -164,7 +150,6 @@ pub const LibCInstallation = struct {
             include_dir,
             sys_include_dir,
             crt_dir,
-            static_crt_dir,
             msvc_lib_dir,
             kernel32_lib_dir,
         });
@@ -186,7 +171,6 @@ pub const LibCInstallation = struct {
                 var batch = Batch(FindError!void, 3, .auto_async).init();
                 batch.add(&async self.findNativeIncludeDirPosix(args));
                 batch.add(&async self.findNativeCrtDirPosix(args));
-                batch.add(&async self.findNativeStaticCrtDirPosix(args));
                 try batch.wait();
             } else {
                 var sdk: *ZigWindowsSDK = undefined;
@@ -348,7 +332,7 @@ pub const LibCInstallation = struct {
 
         for (searches) |search| {
             result_buf.shrink(0);
-            const stream = &std.io.BufferOutStream.init(&result_buf).stream;
+            const stream = result_buf.outStream();
             try stream.print("{}\\Include\\{}\\ucrt", .{ search.path, search.version });
 
             var dir = fs.cwd().openDirList(result_buf.toSliceConst()) catch |err| switch (err) {
@@ -395,7 +379,7 @@ pub const LibCInstallation = struct {
 
         for (searches) |search| {
             result_buf.shrink(0);
-            const stream = &std.io.BufferOutStream.init(&result_buf).stream;
+            const stream = result_buf.outStream();
             try stream.print("{}\\Lib\\{}\\ucrt\\{}", .{ search.path, search.version, arch_sub_dir });
 
             var dir = fs.cwd().openDirList(result_buf.toSliceConst()) catch |err| switch (err) {
@@ -428,15 +412,6 @@ pub const LibCInstallation = struct {
         });
     }
 
-    fn findNativeStaticCrtDirPosix(self: *LibCInstallation, args: FindNativeOptions) FindError!void {
-        self.static_crt_dir = try ccPrintFileName(.{
-            .allocator = args.allocator,
-            .search_basename = "crtbegin.o",
-            .want_dirname = .only_dir,
-            .verbose = args.verbose,
-        });
-    }
-
     fn findNativeKernel32LibDir(
         self: *LibCInstallation,
         args: FindNativeOptions,
@@ -459,7 +434,7 @@ pub const LibCInstallation = struct {
 
         for (searches) |search| {
             result_buf.shrink(0);
-            const stream = &std.io.BufferOutStream.init(&result_buf).stream;
+            const stream = result_buf.outStream();
             try stream.print("{}\\Lib\\{}\\um\\{}", .{ search.path, search.version, arch_sub_dir });
 
             var dir = fs.cwd().openDirList(result_buf.toSliceConst()) catch |err| switch (err) {
diff --git a/src-self-hosted/print_targets.zig b/src-self-hosted/print_targets.zig
index bb3841ba24..ad506425d2 100644
--- a/src-self-hosted/print_targets.zig
+++ b/src-self-hosted/print_targets.zig
@@ -52,7 +52,7 @@ const available_libcs = [_][]const u8{
     "sparc-linux-gnu",
     "sparcv9-linux-gnu",
     "wasm32-freestanding-musl",
-    "x86_64-linux-gnu (native)",
+    "x86_64-linux-gnu",
     "x86_64-linux-gnux32",
     "x86_64-linux-musl",
     "x86_64-windows-gnu",
@@ -61,7 +61,8 @@ const available_libcs = [_][]const u8{
 pub fn cmdTargets(
     allocator: *Allocator,
     args: []const []const u8,
-    stdout: *io.OutStream(fs.File.WriteError),
+    /// Output stream
+    stdout: var,
     native_target: Target,
 ) !void {
     const available_glibcs = blk: {
@@ -92,9 +93,9 @@ pub fn cmdTargets(
     };
     defer allocator.free(available_glibcs);
 
-    const BOS = io.BufferedOutStream(fs.File.WriteError);
-    var bos = BOS.init(stdout);
-    var jws = std.json.WriteStream(BOS.Stream, 6).init(&bos.stream);
+    var bos = io.bufferedOutStream(stdout);
+    const bos_stream = bos.outStream();
+    var jws = std.json.WriteStream(@TypeOf(bos_stream), 6).init(bos_stream);
 
     try jws.beginObject();
 
@@ -219,6 +220,6 @@ pub fn cmdTargets(
 
     try jws.endObject();
 
-    try bos.stream.writeByte('\n');
+    try bos_stream.writeByte('\n');
     return bos.flush();
 }
diff --git a/src-self-hosted/stage2.zig b/src-self-hosted/stage2.zig
index ee6789ab86..38dfbaf072 100644
--- a/src-self-hosted/stage2.zig
+++ b/src-self-hosted/stage2.zig
@@ -18,8 +18,8 @@ const assert = std.debug.assert;
 const LibCInstallation = @import("libc_installation.zig").LibCInstallation;
 
 var stderr_file: fs.File = undefined;
-var stderr: *io.OutStream(fs.File.WriteError) = undefined;
-var stdout: *io.OutStream(fs.File.WriteError) = undefined;
+var stderr: fs.File.OutStream = undefined;
+var stdout: fs.File.OutStream = undefined;
 
 comptime {
     _ = @import("dep_tokenizer.zig");
@@ -146,7 +146,7 @@ export fn stage2_free_clang_errors(errors_ptr: [*]translate_c.ClangErrMsg, error
 }
 
 export fn stage2_render_ast(tree: *ast.Tree, output_file: *FILE) Error {
-    const c_out_stream = &std.io.COutStream.init(output_file).stream;
+    const c_out_stream = std.io.cOutStream(output_file);
     _ = std.zig.render(std.heap.c_allocator, c_out_stream, tree) catch |e| switch (e) {
         error.WouldBlock => unreachable, // stage1 opens stuff in exclusively blocking mode
         error.SystemResources => return .SystemResources,
@@ -186,9 +186,9 @@ fn fmtMain(argc: c_int, argv: [*]const [*:0]const u8) !void {
         try args_list.append(mem.toSliceConst(u8, argv[arg_i]));
     }
 
-    stdout = &std.io.getStdOut().outStream().stream;
+    stdout = std.io.getStdOut().outStream();
     stderr_file = std.io.getStdErr();
-    stderr = &stderr_file.outStream().stream;
+    stderr = stderr_file.outStream();
 
     const args = args_list.toSliceConst()[2..];
 
@@ -203,11 +203,11 @@ fn fmtMain(argc: c_int, argv: [*]const [*:0]const u8) !void {
             const arg = args[i];
             if (mem.startsWith(u8, arg, "-")) {
                 if (mem.eql(u8, arg, "--help")) {
-                    try stdout.write(self_hosted_main.usage_fmt);
+                    try stdout.writeAll(self_hosted_main.usage_fmt);
                     process.exit(0);
                 } else if (mem.eql(u8, arg, "--color")) {
                     if (i + 1 >= args.len) {
-                        try stderr.write("expected [auto|on|off] after --color\n");
+                        try stderr.writeAll("expected [auto|on|off] after --color\n");
                         process.exit(1);
                     }
                     i += 1;
@@ -238,14 +238,14 @@ fn fmtMain(argc: c_int, argv: [*]const [*:0]const u8) !void {
 
     if (stdin_flag) {
         if (input_files.len != 0) {
-            try stderr.write("cannot use --stdin with positional arguments\n");
+            try stderr.writeAll("cannot use --stdin with positional arguments\n");
             process.exit(1);
         }
 
         const stdin_file = io.getStdIn();
         var stdin = stdin_file.inStream();
 
-        const source_code = try stdin.stream.readAllAlloc(allocator, self_hosted_main.max_src_size);
+        const source_code = try stdin.readAllAlloc(allocator, self_hosted_main.max_src_size);
         defer allocator.free(source_code);
 
         const tree = std.zig.parse(allocator, source_code) catch |err| {
@@ -272,7 +272,7 @@ fn fmtMain(argc: c_int, argv: [*]const [*:0]const u8) !void {
     }
 
     if (input_files.len == 0) {
-        try stderr.write("expected at least one source file argument\n");
+        try stderr.writeAll("expected at least one source file argument\n");
         process.exit(1);
     }
 
@@ -409,11 +409,11 @@ fn printErrMsgToFile(
     const end_loc = tree.tokenLocationPtr(first_token.end, last_token);
 
     var text_buf = try std.Buffer.initSize(allocator, 0);
-    var out_stream = &std.io.BufferOutStream.init(&text_buf).stream;
+    const out_stream = &text_buf.outStream();
     try parse_error.render(&tree.tokens, out_stream);
     const text = text_buf.toOwnedSlice();
 
-    const stream = &file.outStream().stream;
+    const stream = &file.outStream();
     try stream.print("{}:{}:{}: error: {}\n", .{ path, start_loc.line + 1, start_loc.column + 1, text });
 
     if (!color_on) return;
@@ -626,22 +626,30 @@ fn detectNativeCpuWithLLVM(
 }
 
 // ABI warning
-export fn stage2_cmd_targets(zig_triple: [*:0]const u8) c_int {
-    cmdTargets(zig_triple) catch |err| {
+export fn stage2_cmd_targets(
+    zig_triple: ?[*:0]const u8,
+    mcpu: ?[*:0]const u8,
+    dynamic_linker: ?[*:0]const u8,
+) c_int {
+    cmdTargets(zig_triple, mcpu, dynamic_linker) catch |err| {
         std.debug.warn("unable to list targets: {}\n", .{@errorName(err)});
         return -1;
     };
     return 0;
 }
 
-fn cmdTargets(zig_triple: [*:0]const u8) !void {
-    var cross_target = try CrossTarget.parse(.{ .arch_os_abi = mem.toSliceConst(u8, zig_triple) });
+fn cmdTargets(
+    zig_triple_oz: ?[*:0]const u8,
+    mcpu_oz: ?[*:0]const u8,
+    dynamic_linker_oz: ?[*:0]const u8,
+) !void {
+    const cross_target = try stage2CrossTarget(zig_triple_oz, mcpu_oz, dynamic_linker_oz);
     var dynamic_linker: ?[*:0]u8 = null;
     const target = try crossTargetToTarget(cross_target, &dynamic_linker);
     return @import("print_targets.zig").cmdTargets(
         std.heap.c_allocator,
         &[0][]u8{},
-        &std.io.getStdOut().outStream().stream,
+        std.io.getStdOut().outStream(),
         target,
     );
 }
@@ -673,51 +681,58 @@ export fn stage2_target_parse(
     return .None;
 }
 
+fn stage2CrossTarget(
+    zig_triple_oz: ?[*:0]const u8,
+    mcpu_oz: ?[*:0]const u8,
+    dynamic_linker_oz: ?[*:0]const u8,
+) !CrossTarget {
+    const zig_triple = if (zig_triple_oz) |zig_triple_z| mem.toSliceConst(u8, zig_triple_z) else "native";
+    const mcpu = if (mcpu_oz) |mcpu_z| mem.toSliceConst(u8, mcpu_z) else null;
+    const dynamic_linker = if (dynamic_linker_oz) |dl_z| mem.toSliceConst(u8, dl_z) else null;
+    var diags: CrossTarget.ParseOptions.Diagnostics = .{};
+    const target: CrossTarget = CrossTarget.parse(.{
+        .arch_os_abi = zig_triple,
+        .cpu_features = mcpu,
+        .dynamic_linker = dynamic_linker,
+        .diagnostics = &diags,
+    }) catch |err| switch (err) {
+        error.UnknownCpuModel => {
+            std.debug.warn("Unknown CPU: '{}'\nAvailable CPUs for architecture '{}':\n", .{
+                diags.cpu_name.?,
+                @tagName(diags.arch.?),
+            });
+            for (diags.arch.?.allCpuModels()) |cpu| {
+                std.debug.warn(" {}\n", .{cpu.name});
+            }
+            process.exit(1);
+        },
+        error.UnknownCpuFeature => {
+            std.debug.warn(
+                \\Unknown CPU feature: '{}'
+                \\Available CPU features for architecture '{}':
+                \\
+            , .{
+                diags.unknown_feature_name,
+                @tagName(diags.arch.?),
+            });
+            for (diags.arch.?.allFeaturesList()) |feature| {
+                std.debug.warn(" {}: {}\n", .{ feature.name, feature.description });
+            }
+            process.exit(1);
+        },
+        else => |e| return e,
+    };
+
+    return target;
+}
+
 fn stage2TargetParse(
     stage1_target: *Stage2Target,
     zig_triple_oz: ?[*:0]const u8,
     mcpu_oz: ?[*:0]const u8,
     dynamic_linker_oz: ?[*:0]const u8,
 ) !void {
-    const target: CrossTarget = if (zig_triple_oz) |zig_triple_z| blk: {
-        const zig_triple = mem.toSliceConst(u8, zig_triple_z);
-        const mcpu = if (mcpu_oz) |mcpu_z| mem.toSliceConst(u8, mcpu_z) else null;
-        const dynamic_linker = if (dynamic_linker_oz) |dl_z| mem.toSliceConst(u8, dl_z) else null;
-        var diags: CrossTarget.ParseOptions.Diagnostics = .{};
-        break :blk CrossTarget.parse(.{
-            .arch_os_abi = zig_triple,
-            .cpu_features = mcpu,
-            .dynamic_linker = dynamic_linker,
-            .diagnostics = &diags,
-        }) catch |err| switch (err) {
-            error.UnknownCpuModel => {
-                std.debug.warn("Unknown CPU: '{}'\nAvailable CPUs for architecture '{}':\n", .{
-                    diags.cpu_name.?,
-                    @tagName(diags.arch.?),
-                });
-                for (diags.arch.?.allCpuModels()) |cpu| {
-                    std.debug.warn(" {}\n", .{cpu.name});
-                }
-                process.exit(1);
-            },
-            error.UnknownCpuFeature => {
-                std.debug.warn(
-                    \\Unknown CPU feature: '{}'
-                    \\Available CPU features for architecture '{}':
-                    \\
-                , .{
-                    diags.unknown_feature_name,
-                    @tagName(diags.arch.?),
-                });
-                for (diags.arch.?.allFeaturesList()) |feature| {
-                    std.debug.warn(" {}: {}\n", .{ feature.name, feature.description });
-                }
-                process.exit(1);
-            },
-            else => |e| return e,
-        };
-    } else .{};
-
+    const target = try stage2CrossTarget(zig_triple_oz, mcpu_oz, dynamic_linker_oz);
     try stage1_target.fromTarget(target);
 }
 
@@ -729,8 +744,6 @@ const Stage2LibCInstallation = extern struct {
     sys_include_dir_len: usize,
     crt_dir: [*:0]const u8,
     crt_dir_len: usize,
-    static_crt_dir: [*:0]const u8,
-    static_crt_dir_len: usize,
     msvc_lib_dir: [*:0]const u8,
     msvc_lib_dir_len: usize,
     kernel32_lib_dir: [*:0]const u8,
@@ -758,13 +771,6 @@ const Stage2LibCInstallation = extern struct {
             self.crt_dir = "";
             self.crt_dir_len = 0;
         }
-        if (libc.static_crt_dir) |s| {
-            self.static_crt_dir = s.ptr;
-            self.static_crt_dir_len = s.len;
-        } else {
-            self.static_crt_dir = "";
-            self.static_crt_dir_len = 0;
-        }
         if (libc.msvc_lib_dir) |s| {
             self.msvc_lib_dir = s.ptr;
             self.msvc_lib_dir_len = s.len;
@@ -792,9 +798,6 @@ const Stage2LibCInstallation = extern struct {
         if (self.crt_dir_len != 0) {
             libc.crt_dir = self.crt_dir[0..self.crt_dir_len :0];
         }
-        if (self.static_crt_dir_len != 0) {
-            libc.static_crt_dir = self.static_crt_dir[0..self.static_crt_dir_len :0];
-        }
         if (self.msvc_lib_dir_len != 0) {
             libc.msvc_lib_dir = self.msvc_lib_dir[0..self.msvc_lib_dir_len :0];
         }
@@ -808,7 +811,7 @@ const Stage2LibCInstallation = extern struct {
 // ABI warning
 export fn stage2_libc_parse(stage1_libc: *Stage2LibCInstallation, libc_file_z: [*:0]const u8) Error {
     stderr_file = std.io.getStdErr();
-    stderr = &stderr_file.outStream().stream;
+    stderr = stderr_file.outStream();
     const libc_file = mem.toSliceConst(u8, libc_file_z);
     var libc = LibCInstallation.parse(std.heap.c_allocator, libc_file, stderr) catch |err| switch (err) {
         error.ParseError => return .SemanticAnalyzeFail,
@@ -870,7 +873,7 @@ export fn stage2_libc_find_native(stage1_libc: *Stage2LibCInstallation) Error {
 // ABI warning
 export fn stage2_libc_render(stage1_libc: *Stage2LibCInstallation, output_file: *FILE) Error {
     var libc = stage1_libc.toStage2();
-    const c_out_stream = &std.io.COutStream.init(output_file).stream;
+    const c_out_stream = std.io.cOutStream(output_file);
     libc.render(c_out_stream) catch |err| switch (err) {
         error.WouldBlock => unreachable, // stage1 opens stuff in exclusively blocking mode
         error.SystemResources => return .SystemResources,
@@ -902,26 +905,11 @@ const Stage2Target = extern struct {
     llvm_cpu_features: ?[*:0]const u8,
     cpu_builtin_str: ?[*:0]const u8,
     cache_hash: ?[*:0]const u8,
+    cache_hash_len: usize,
     os_builtin_str: ?[*:0]const u8,
 
     dynamic_linker: ?[*:0]const u8,
 
-    fn toTarget(in_target: Stage2Target) CrossTarget {
-        if (in_target.is_native) return .{};
-
-        const in_arch = in_target.arch - 1; // skip over ZigLLVM_UnknownArch
-        const in_os = in_target.os;
-        const in_abi = in_target.abi;
-
-        return .{
-            .Cross = .{
-                .cpu = Target.Cpu.baseline(enumInt(Target.Cpu.Arch, in_arch)),
-                .os = Target.Os.defaultVersionRange(enumInt(Target.Os.Tag, in_os)),
-                .abi = enumInt(Target.Abi, in_abi),
-            },
-        };
-    }
-
     fn fromTarget(self: *Stage2Target, cross_target: CrossTarget) !void {
         const allocator = std.heap.c_allocator;
 
@@ -1031,7 +1019,7 @@ const Stage2Target = extern struct {
             .macosx,
             .netbsd,
             .openbsd,
-            => try os_builtin_str_buffer.print(
+            => try os_builtin_str_buffer.outStream().print(
                 \\ .semver = .{{
                 \\        .min = .{{
                 \\            .major = {},
@@ -1055,7 +1043,7 @@ const Stage2Target = extern struct {
                 target.os.version_range.semver.max.patch,
             }),
 
-            .linux => try os_builtin_str_buffer.print(
+            .linux => try os_builtin_str_buffer.outStream().print(
                 \\ .linux = .{{
                 \\        .range = .{{
                 \\            .min = .{{
@@ -1090,7 +1078,7 @@ const Stage2Target = extern struct {
                 target.os.version_range.linux.glibc.patch,
             }),
 
-            .windows => try os_builtin_str_buffer.print(
+            .windows => try os_builtin_str_buffer.outStream().print(
                 \\ .windows = .{{
                 \\        .min = .{},
                 \\        .max = .{},
@@ -1131,6 +1119,7 @@ const Stage2Target = extern struct {
             }
         };
 
+        const cache_hash_slice = cache_hash.toOwnedSlice();
         self.* = .{
             .arch = @enumToInt(target.cpu.arch) + 1, // skip over ZigLLVM_UnknownArch
             .vendor = 0,
@@ -1140,7 +1129,8 @@ const Stage2Target = extern struct {
             .llvm_cpu_features = llvm_features_buffer.toOwnedSlice().ptr,
             .cpu_builtin_str = cpu_builtin_str_buffer.toOwnedSlice().ptr,
             .os_builtin_str = os_builtin_str_buffer.toOwnedSlice().ptr,
-            .cache_hash = cache_hash.toOwnedSlice().ptr,
+            .cache_hash = cache_hash_slice.ptr,
+            .cache_hash_len = cache_hash_slice.len,
             .is_native = cross_target.isNative(),
             .glibc_or_darwin_version = glibc_or_darwin_version,
             .dynamic_linker = dynamic_linker,
diff --git a/src-self-hosted/translate_c.zig b/src-self-hosted/translate_c.zig
index 65469c4701..51dcb8ff97 100644
--- a/src-self-hosted/translate_c.zig
+++ b/src-self-hosted/translate_c.zig
@@ -560,7 +560,7 @@ fn visitVarDecl(c: *Context, var_decl: *const ZigClangVarDecl) Error!void {
 
     // TODO https://github.com/ziglang/zig/issues/3756
     // TODO https://github.com/ziglang/zig/issues/1802
-    const checked_name = if (isZigPrimitiveType(var_name)) try std.fmt.allocPrint(c.a(), "_{}", .{var_name}) else var_name;
+    const checked_name = if (isZigPrimitiveType(var_name)) try std.fmt.allocPrint(c.a(), "{}_{}", .{ var_name, c.getMangle() }) else var_name;
     const var_decl_loc = ZigClangVarDecl_getLocation(var_decl);
 
     const qual_type = ZigClangVarDecl_getTypeSourceInfo_getType(var_decl);
@@ -632,7 +632,7 @@ fn visitVarDecl(c: *Context, var_decl: *const ZigClangVarDecl) Error!void {
     const align_expr = blk: {
         const alignment = ZigClangVarDecl_getAlignedAttribute(var_decl, rp.c.clang_context);
         if (alignment != 0) {
-            _ = try appendToken(rp.c, .Keyword_linksection, "align");
+            _ = try appendToken(rp.c, .Keyword_align, "align");
             _ = try appendToken(rp.c, .LParen, "(");
             // Clang reports the alignment in bits
             const expr = try transCreateNodeInt(rp.c, alignment / 8);
@@ -677,7 +677,7 @@ fn transTypeDef(c: *Context, typedef_decl: *const ZigClangTypedefNameDecl, top_l
 
     // TODO https://github.com/ziglang/zig/issues/3756
     // TODO https://github.com/ziglang/zig/issues/1802
-    const checked_name = if (isZigPrimitiveType(typedef_name)) try std.fmt.allocPrint(c.a(), "_{}", .{typedef_name}) else typedef_name;
+    const checked_name = if (isZigPrimitiveType(typedef_name)) try std.fmt.allocPrint(c.a(), "{}_{}", .{ typedef_name, c.getMangle() }) else typedef_name;
 
     if (mem.eql(u8, checked_name, "uint8_t"))
         return transTypeDefAsBuiltin(c, typedef_decl, "u8")
@@ -793,6 +793,7 @@ fn transRecordDecl(c: *Context, record_decl: *const ZigClangRecordDecl) Error!?*
         while (ZigClangRecordDecl_field_iterator_neq(it, end_it)) : (it = ZigClangRecordDecl_field_iterator_next(it)) {
             const field_decl = ZigClangRecordDecl_field_iterator_deref(it);
             const field_loc = ZigClangFieldDecl_getLocation(field_decl);
+            const field_qt = ZigClangFieldDecl_getType(field_decl);
 
             if (ZigClangFieldDecl_isBitField(field_decl)) {
                 const opaque = try transCreateNodeOpaqueType(c);
@@ -801,6 +802,13 @@ fn transRecordDecl(c: *Context, record_decl: *const ZigClangRecordDecl) Error!?*
                 break :blk opaque;
             }
 
+            if (ZigClangType_isIncompleteOrZeroLengthArrayType(qualTypeCanon(field_qt), c.clang_context)) {
+                const opaque = try transCreateNodeOpaqueType(c);
+                semicolon = try appendToken(c, .Semicolon, ";");
+                try emitWarning(c, field_loc, "{} demoted to opaque type - has variable length array", .{container_kind_name});
+                break :blk opaque;
+            }
+
             var is_anon = false;
             var raw_name = try c.str(ZigClangNamedDecl_getName_bytes_begin(@ptrCast(*const ZigClangNamedDecl, field_decl)));
             if (ZigClangFieldDecl_isAnonymousStructOrUnion(field_decl)) {
@@ -809,7 +817,7 @@ fn transRecordDecl(c: *Context, record_decl: *const ZigClangRecordDecl) Error!?*
             }
             const field_name = try appendIdentifier(c, raw_name);
             _ = try appendToken(c, .Colon, ":");
-            const field_type = transQualType(rp, ZigClangFieldDecl_getType(field_decl), field_loc) catch |err| switch (err) {
+            const field_type = transQualType(rp, field_qt, field_loc) catch |err| switch (err) {
                 error.UnsupportedType => {
                     const opaque = try transCreateNodeOpaqueType(c);
                     semicolon = try appendToken(c, .Semicolon, ";");
@@ -819,6 +827,20 @@ fn transRecordDecl(c: *Context, record_decl: *const ZigClangRecordDecl) Error!?*
                 else => |e| return e,
             };
 
+            const align_expr = blk: {
+                const alignment = ZigClangFieldDecl_getAlignedAttribute(field_decl, rp.c.clang_context);
+                if (alignment != 0) {
+                    _ = try appendToken(rp.c, .Keyword_align, "align");
+                    _ = try appendToken(rp.c, .LParen, "(");
+                    // Clang reports the alignment in bits
+                    const expr = try transCreateNodeInt(rp.c, alignment / 8);
+                    _ = try appendToken(rp.c, .RParen, ")");
+
+                    break :blk expr;
+                }
+                break :blk null;
+            };
+
             const field_node = try c.a().create(ast.Node.ContainerField);
             field_node.* = .{
                 .doc_comments = null,
@@ -826,7 +848,7 @@ fn transRecordDecl(c: *Context, record_decl: *const ZigClangRecordDecl) Error!?*
                 .name_token = field_name,
                 .type_expr = field_type,
                 .value_expr = null,
-                .align_expr = null,
+                .align_expr = align_expr,
             };
 
             if (is_anon) {
@@ -4599,7 +4621,7 @@ fn finishTransFnProto(
         if (fn_decl) |decl| {
             const alignment = ZigClangFunctionDecl_getAlignedAttribute(decl, rp.c.clang_context);
             if (alignment != 0) {
-                _ = try appendToken(rp.c, .Keyword_linksection, "align");
+                _ = try appendToken(rp.c, .Keyword_align, "align");
                 _ = try appendToken(rp.c, .LParen, "(");
                 // Clang reports the alignment in bits
                 const expr = try transCreateNodeInt(rp.c, alignment / 8);
@@ -4731,15 +4753,10 @@ fn appendToken(c: *Context, token_id: Token.Id, bytes: []const u8) !ast.TokenInd
 
 fn appendTokenFmt(c: *Context, token_id: Token.Id, comptime format: []const u8, args: var) !ast.TokenIndex {
     assert(token_id != .Invalid);
-    const S = struct {
-        fn callback(context: *Context, bytes: []const u8) error{OutOfMemory}!void {
-            return context.source_buffer.append(bytes);
-        }
-    };
     const start_index = c.source_buffer.len();
     errdefer c.source_buffer.shrink(start_index);
 
-    try std.fmt.format(c, error{OutOfMemory}, S.callback, format, args);
+    try c.source_buffer.outStream().print(format, args);
     const end_index = c.source_buffer.len();
     const token_index = c.tree.tokens.len;
     const new_token = try c.tree.tokens.addOne();
@@ -4850,7 +4867,7 @@ fn transPreprocessorEntities(c: *Context, unit: *ZigClangASTUnit) Error!void {
                 const name = try c.str(raw_name);
                 // TODO https://github.com/ziglang/zig/issues/3756
                 // TODO https://github.com/ziglang/zig/issues/1802
-                const mangled_name = if (isZigPrimitiveType(name)) try std.fmt.allocPrint(c.a(), "_{}", .{name}) else name;
+                const mangled_name = if (isZigPrimitiveType(name)) try std.fmt.allocPrint(c.a(), "{}_{}", .{ name, c.getMangle() }) else name;
                 if (scope.containsNow(mangled_name)) {
                     continue;
                 }
@@ -5354,7 +5371,7 @@ fn parseCPrimaryExpr(c: *Context, it: *CTokenList.Iterator, source: []const u8,
             const first_tok = it.list.at(0);
             const token = try appendToken(c, .CharLiteral, try zigifyEscapeSequences(c, source[tok.start..tok.end], source[first_tok.start..first_tok.end], source_loc));
             const node = try c.a().create(ast.Node.CharLiteral);
-            node.* = ast.Node.CharLiteral{
+            node.* = .{
                 .token = token,
             };
             return &node.base;
@@ -5363,7 +5380,7 @@ fn parseCPrimaryExpr(c: *Context, it: *CTokenList.Iterator, source: []const u8,
             const first_tok = it.list.at(0);
             const token = try appendToken(c, .StringLiteral, try zigifyEscapeSequences(c, source[tok.start..tok.end], source[first_tok.start..first_tok.end], source_loc));
             const node = try c.a().create(ast.Node.StringLiteral);
-            node.* = ast.Node.StringLiteral{
+            node.* = .{
                 .token = token,
             };
             return &node.base;
@@ -5428,15 +5445,14 @@ fn parseCPrimaryExpr(c: *Context, it: *CTokenList.Iterator, source: []const u8,
                 return error.ParseError;
             }
 
-            // TODO: It might be nice if we only did the alignCasting for opaque types
-            //(  if (@typeInfo(@TypeOf(x)) == .Pointer)
-            //    @ptrCast(dest, @alignCast(@alignOf(dest.Child), x))
-            //else if (@typeInfo(@TypeOf(x)) == .Integer)
+            //if (@typeInfo(@TypeOf(x)) == .Pointer)
+            //    @ptrCast(dest, x)
+            //else if (@typeInfo(@TypeOf(x)) == .Int and @typeInfo(dest) == .Pointer)
             //    @intToPtr(dest, x)
             //else
-            //    @as(dest, x) )
+            //    @as(dest, x)
 
-            const group_lparen = try appendToken(c, .LParen, "(");
+            const lparen = try appendToken(c, .LParen, "(");
 
             const if_1 = try transCreateNodeIf(c);
             const type_id_1 = try transCreateNodeBuiltinFnCall(c, "@typeInfo");
@@ -5456,30 +5472,9 @@ fn parseCPrimaryExpr(c: *Context, it: *CTokenList.Iterator, source: []const u8,
             if_1.condition = &cmp_1.base;
             _ = try appendToken(c, .RParen, ")");
 
-            const period_tok = try appendToken(c, .Period, ".");
-            const child_ident = try transCreateNodeIdentifier(c, "Child");
-            const inner_node_child = try c.a().create(ast.Node.InfixOp);
-            inner_node_child.* = .{
-                .op_token = period_tok,
-                .lhs = inner_node,
-                .op = .Period,
-                .rhs = child_ident,
-            };
-
-            const align_of = try transCreateNodeBuiltinFnCall(c, "@alignOf");
-            try align_of.params.push(&inner_node_child.base);
-            align_of.rparen_token = try appendToken(c, .RParen, ")");
-            // hack to get zig fmt to render a comma in builtin calls
-            _ = try appendToken(c, .Comma, ",");
-
-            const align_cast = try transCreateNodeBuiltinFnCall(c, "@alignCast");
-            try align_cast.params.push(&align_of.base);
-            try align_cast.params.push(node_to_cast);
-            align_cast.rparen_token = try appendToken(c, .RParen, ")");
-
             const ptr_cast = try transCreateNodeBuiltinFnCall(c, "@ptrCast");
             try ptr_cast.params.push(inner_node);
-            try ptr_cast.params.push(&align_cast.base);
+            try ptr_cast.params.push(node_to_cast);
             ptr_cast.rparen_token = try appendToken(c, .RParen, ")");
             if_1.body = &ptr_cast.base;
 
@@ -5502,6 +5497,25 @@ fn parseCPrimaryExpr(c: *Context, it: *CTokenList.Iterator, source: []const u8,
                 .rhs = try transCreateNodeEnumLiteral(c, "Int"),
             };
             if_2.condition = &cmp_2.base;
+            const cmp_4 = try c.a().create(ast.Node.InfixOp);
+            cmp_4.* = .{
+                .op_token = try appendToken(c, .Keyword_and, "and"),
+                .lhs = &cmp_2.base,
+                .op = .BoolAnd,
+                .rhs = undefined,
+            };
+            const type_id_3 = try transCreateNodeBuiltinFnCall(c, "@typeInfo");
+            try type_id_3.params.push(inner_node);
+            type_id_3.rparen_token = try appendToken(c, .LParen, ")");
+            const cmp_3 = try c.a().create(ast.Node.InfixOp);
+            cmp_3.* = .{
+                .op_token = try appendToken(c, .EqualEqual, "=="),
+                .lhs = &type_id_3.base,
+                .op = .EqualEqual,
+                .rhs = try transCreateNodeEnumLiteral(c, "Pointer"),
+            };
+            cmp_4.rhs = &cmp_3.base;
+            if_2.condition = &cmp_4.base;
             else_1.body = &if_2.base;
             _ = try appendToken(c, .RParen, ")");
 
@@ -5520,14 +5534,13 @@ fn parseCPrimaryExpr(c: *Context, it: *CTokenList.Iterator, source: []const u8,
             as.rparen_token = try appendToken(c, .RParen, ")");
             else_2.body = &as.base;
 
-            const group_rparen = try appendToken(c, .RParen, ")");
-            const grouped_expr = try c.a().create(ast.Node.GroupedExpression);
-            grouped_expr.* = .{
-                .lparen = group_lparen,
+            const group_node = try c.a().create(ast.Node.GroupedExpression);
+            group_node.* = .{
+                .lparen = lparen,
                 .expr = &if_1.base,
-                .rparen = group_rparen,
+                .rparen = try appendToken(c, .RParen, ")"),
             };
-            return &grouped_expr.base;
+            return &group_node.base;
         },
         else => {
             const first_tok = it.list.at(0);
@@ -5543,12 +5556,63 @@ fn parseCPrimaryExpr(c: *Context, it: *CTokenList.Iterator, source: []const u8,
     }
 }
 
+fn macroBoolToInt(c: *Context, node: *ast.Node) !*ast.Node {
+    if (!isBoolRes(node)) {
+        if (node.id != .InfixOp) return node;
+
+        const group_node = try c.a().create(ast.Node.GroupedExpression);
+        group_node.* = .{
+            .lparen = try appendToken(c, .LParen, "("),
+            .expr = node,
+            .rparen = try appendToken(c, .RParen, ")"),
+        };
+        return &group_node.base;
+    }
+
+    const builtin_node = try transCreateNodeBuiltinFnCall(c, "@boolToInt");
+    try builtin_node.params.push(node);
+    builtin_node.rparen_token = try appendToken(c, .RParen, ")");
+    return &builtin_node.base;
+}
+
+fn macroIntToBool(c: *Context, node: *ast.Node) !*ast.Node {
+    if (isBoolRes(node)) {
+        if (node.id != .InfixOp) return node;
+
+        const group_node = try c.a().create(ast.Node.GroupedExpression);
+        group_node.* = .{
+            .lparen = try appendToken(c, .LParen, "("),
+            .expr = node,
+            .rparen = try appendToken(c, .RParen, ")"),
+        };
+        return &group_node.base;
+    }
+
+    const op_token = try appendToken(c, .BangEqual, "!=");
+    const zero = try transCreateNodeInt(c, 0);
+    const res = try c.a().create(ast.Node.InfixOp);
+    res.* = .{
+        .op_token = op_token,
+        .lhs = node,
+        .op = .BangEqual,
+        .rhs = zero,
+    };
+    const group_node = try c.a().create(ast.Node.GroupedExpression);
+    group_node.* = .{
+        .lparen = try appendToken(c, .LParen, "("),
+        .expr = &res.base,
+        .rparen = try appendToken(c, .RParen, ")"),
+    };
+    return &group_node.base;
+}
+
 fn parseCSuffixOpExpr(c: *Context, it: *CTokenList.Iterator, source: []const u8, source_loc: ZigClangSourceLocation, scope: *Scope) ParseError!*ast.Node {
     var node = try parseCPrimaryExpr(c, it, source, source_loc, scope);
     while (true) {
         const tok = it.next().?;
         var op_token: ast.TokenIndex = undefined;
         var op_id: ast.Node.InfixOp.Op = undefined;
+        var bool_op = false;
         switch (tok.id) {
             .Period => {
                 const name_tok = it.next().?;
@@ -5637,10 +5701,12 @@ fn parseCSuffixOpExpr(c: *Context, it: *CTokenList.Iterator, source: []const u8,
             .AmpersandAmpersand => {
                 op_token = try appendToken(c, .Keyword_and, "and");
                 op_id = .BoolAnd;
+                bool_op = true;
             },
             .PipePipe => {
                 op_token = try appendToken(c, .Keyword_or, "or");
                 op_id = .BoolOr;
+                bool_op = true;
             },
             .AngleBracketRight => {
                 op_token = try appendToken(c, .AngleBracketRight, ">");
@@ -5711,12 +5777,10 @@ fn parseCSuffixOpExpr(c: *Context, it: *CTokenList.Iterator, source: []const u8,
                 op_id = .EqualEqual;
             },
             .Slash => {
-                // unsigned/float division uses the operator
                 op_id = .Div;
                 op_token = try appendToken(c, .Slash, "/");
             },
             .Percent => {
-                // unsigned/float division uses the operator
                 op_id = .Mod;
                 op_token = try appendToken(c, .Percent, "%");
             },
@@ -5725,12 +5789,15 @@ fn parseCSuffixOpExpr(c: *Context, it: *CTokenList.Iterator, source: []const u8,
                 return node;
             },
         }
+        const cast_fn = if (bool_op) macroIntToBool else macroBoolToInt;
+        const lhs_node = try cast_fn(c, node);
+        const rhs_node = try parseCPrefixOpExpr(c, it, source, source_loc, scope);
         const op_node = try c.a().create(ast.Node.InfixOp);
         op_node.* = .{
             .op_token = op_token,
-            .lhs = node,
+            .lhs = lhs_node,
             .op = op_id,
-            .rhs = try parseCPrefixOpExpr(c, it, source, source_loc, scope),
+            .rhs = try cast_fn(c, rhs_node),
         };
         node = &op_node.base;
     }
diff --git a/src/all_types.hpp b/src/all_types.hpp
index 699a6601ab..e58ecf3dbb 100644
--- a/src/all_types.hpp
+++ b/src/all_types.hpp
@@ -651,6 +651,7 @@ enum NodeType {
     NodeTypeSwitchProng,
     NodeTypeSwitchRange,
     NodeTypeCompTime,
+    NodeTypeNoAsync,
     NodeTypeBreak,
     NodeTypeContinue,
     NodeTypeAsmExpr,
@@ -991,6 +992,10 @@ struct AstNodeCompTime {
     AstNode *expr;
 };
 
+struct AstNodeNoAsync {
+    AstNode *expr;
+};
+
 struct AsmOutput {
     Buf *asm_symbolic_name;
     Buf *constraint;
@@ -1148,7 +1153,6 @@ struct AstNodeErrorType {
 };
 
 struct AstNodeAwaitExpr {
-    Token *noasync_token;
     AstNode *expr;
 };
 
@@ -1199,6 +1203,7 @@ struct AstNode {
         AstNodeSwitchProng switch_prong;
         AstNodeSwitchRange switch_range;
         AstNodeCompTime comptime_expr;
+        AstNodeNoAsync noasync_expr;
         AstNodeAsmExpr asm_expr;
         AstNodeFieldAccessExpr field_access_expr;
         AstNodePtrDerefExpr ptr_deref_expr;
@@ -1828,6 +1833,7 @@ enum PanicMsgId {
     PanicMsgIdBadNoAsyncCall,
     PanicMsgIdResumeNotSuspendedFn,
     PanicMsgIdBadSentinel,
+    PanicMsgIdShxTooBigRhs,
 
     PanicMsgIdCount,
 };
@@ -2324,6 +2330,7 @@ enum ScopeId {
     ScopeIdRuntime,
     ScopeIdTypeOf,
     ScopeIdExpr,
+    ScopeIdNoAsync,
 };
 
 struct Scope {
@@ -2456,6 +2463,11 @@ struct ScopeCompTime {
     Scope base;
 };
 
+// This scope is created for a noasync expression.
+// NodeTypeNoAsync
+struct ScopeNoAsync {
+    Scope base;
+};
 
 // This scope is created for a function definition.
 // NodeTypeFnDef
diff --git a/src/analyze.cpp b/src/analyze.cpp
index 7712f0f707..33d28269b9 100644
--- a/src/analyze.cpp
+++ b/src/analyze.cpp
@@ -106,6 +106,7 @@ static ScopeExpr *find_expr_scope(Scope *scope) {
             case ScopeIdDecls:
             case ScopeIdFnDef:
             case ScopeIdCompTime:
+            case ScopeIdNoAsync:
             case ScopeIdVarDecl:
             case ScopeIdCImport:
             case ScopeIdSuspend:
@@ -226,6 +227,12 @@ Scope *create_comptime_scope(CodeGen *g, AstNode *node, Scope *parent) {
     return &scope->base;
 }
 
+Scope *create_noasync_scope(CodeGen *g, AstNode *node, Scope *parent) {
+    ScopeNoAsync *scope = heap::c_allocator.create<ScopeNoAsync>();
+    init_scope(g, &scope->base, ScopeIdNoAsync, node, parent);
+    return &scope->base;
+}
+
 Scope *create_typeof_scope(CodeGen *g, AstNode *node, Scope *parent) {
     ScopeTypeOf *scope = heap::c_allocator.create<ScopeTypeOf>();
     init_scope(g, &scope->base, ScopeIdTypeOf, node, parent);
@@ -1955,29 +1962,14 @@ static ZigType *analyze_fn_type(CodeGen *g, AstNode *proto_node, Scope *child_sc
         return g->builtin_types.entry_invalid;
     }
 
-    switch (specified_return_type->id) {
-        case ZigTypeIdInvalid:
-            zig_unreachable();
-
-        case ZigTypeIdUndefined:
-        case ZigTypeIdNull:
-            add_node_error(g, fn_proto->return_type,
-                buf_sprintf("return type '%s' not allowed", buf_ptr(&specified_return_type->name)));
-            return g->builtin_types.entry_invalid;
-
-        case ZigTypeIdOpaque:
-        {
-            ErrorMsg* msg = add_node_error(g, fn_proto->return_type,
-                buf_sprintf("opaque return type '%s' not allowed", buf_ptr(&specified_return_type->name)));
-            Tld *tld = find_decl(g, &fn_entry->fndef_scope->base, &specified_return_type->name);
-            if (tld != nullptr) {
-                add_error_note(g, msg, tld->source_node, buf_sprintf("declared here"));
-            }
-            return g->builtin_types.entry_invalid;
+    if(!is_valid_return_type(specified_return_type)){
+        ErrorMsg* msg = add_node_error(g, fn_proto->return_type,
+            buf_sprintf("%s return type '%s' not allowed", type_id_name(specified_return_type->id), buf_ptr(&specified_return_type->name)));
+        Tld *tld = find_decl(g, &fn_entry->fndef_scope->base, &specified_return_type->name);
+        if (tld != nullptr) {
+            add_error_note(g, msg, tld->source_node, buf_sprintf("type declared here"));
         }
-
-        default:
-            break;
+        return g->builtin_types.entry_invalid;
     }
 
     if (fn_proto->auto_err_set) {
@@ -2049,6 +2041,19 @@ static ZigType *analyze_fn_type(CodeGen *g, AstNode *proto_node, Scope *child_sc
     return get_fn_type(g, &fn_type_id);
 }
 
+bool is_valid_return_type(ZigType* type) {
+    switch (type->id) {
+        case ZigTypeIdInvalid:
+        case ZigTypeIdUndefined:
+        case ZigTypeIdNull:
+        case ZigTypeIdOpaque:
+            return false;
+        default:
+            return true;
+    }
+    zig_unreachable();
+}
+
 bool type_is_invalid(ZigType *type_entry) {
     switch (type_entry->id) {
         case ZigTypeIdInvalid:
@@ -2893,7 +2898,7 @@ static Error resolve_struct_zero_bits(CodeGen *g, ZigType *struct_type) {
             return ErrorSemanticAnalyzeFail;
         }
         if (field_is_opaque_type) {
-            add_node_error(g, field_node->data.struct_field.type,
+            add_node_error(g, field_node,
                 buf_sprintf("opaque types have unknown size and therefore cannot be directly embedded in structs"));
             struct_type->data.structure.resolve_status = ResolveStatusInvalid;
             return ErrorSemanticAnalyzeFail;
@@ -3185,7 +3190,7 @@ static Error resolve_union_zero_bits(CodeGen *g, ZigType *union_type) {
                 return ErrorSemanticAnalyzeFail;
             }
             if (field_is_opaque_type) {
-                add_node_error(g, field_node->data.struct_field.type,
+                add_node_error(g, field_node,
                     buf_create_from_str(
                         "opaque types have unknown size and therefore cannot be directly embedded in unions"));
                 union_type->data.unionation.resolve_status = ResolveStatusInvalid;
@@ -3755,6 +3760,7 @@ void scan_decls(CodeGen *g, ScopeDecls *decls_scope, AstNode *node) {
         case NodeTypeCompTime:
             preview_comptime_decl(g, node, decls_scope);
             break;
+        case NodeTypeNoAsync:
         case NodeTypeParamDecl:
         case NodeTypeReturnExpr:
         case NodeTypeDefer:
@@ -5789,6 +5795,7 @@ ZigValue *get_the_one_possible_value(CodeGen *g, ZigType *type_entry) {
     ZigValue *result = g->pass1_arena->create<ZigValue>();
     result->type = type_entry;
     result->special = ConstValSpecialStatic;
+
     if (result->type->id == ZigTypeIdStruct) {
         // The fields array cannot be left unpopulated
         const ZigType *struct_type = result->type;
@@ -5800,6 +5807,22 @@ ZigValue *get_the_one_possible_value(CodeGen *g, ZigType *type_entry) {
             assert(field_type != nullptr);
             result->data.x_struct.fields[i] = get_the_one_possible_value(g, field_type);
         }
+    } else if (result->type->id == ZigTypeIdArray) {
+        // The elements array cannot be left unpopulated
+        ZigType *array_type = result->type;
+        ZigType *elem_type = array_type->data.array.child_type;
+        ZigValue *sentinel_value = array_type->data.array.sentinel;
+        const size_t elem_count = array_type->data.array.len + (sentinel_value != nullptr);
+
+        result->data.x_array.data.s_none.elements = g->pass1_arena->allocate<ZigValue>(elem_count);
+        for (size_t i = 0; i < elem_count; i += 1) {
+            ZigValue *elem_val = &result->data.x_array.data.s_none.elements[i];
+            copy_const_val(g, elem_val, get_the_one_possible_value(g, elem_type));
+        }
+        if (sentinel_value != nullptr) {
+            ZigValue *last_elem_val = &result->data.x_array.data.s_none.elements[elem_count - 1];
+            copy_const_val(g, last_elem_val, sentinel_value);
+        }
     } else if (result->type->id == ZigTypeIdPointer) {
         result->data.x_ptr.special = ConstPtrSpecialRef;
         result->data.x_ptr.data.ref.pointee = get_the_one_possible_value(g, result->type->data.pointer.child_type);
@@ -6176,6 +6199,7 @@ static void mark_suspension_point(Scope *scope) {
             case ScopeIdDecls:
             case ScopeIdFnDef:
             case ScopeIdCompTime:
+            case ScopeIdNoAsync:
             case ScopeIdCImport:
             case ScopeIdSuspend:
             case ScopeIdTypeOf:
@@ -9528,6 +9552,23 @@ void copy_const_val(CodeGen *g, ZigValue *dest, ZigValue *src) {
     }
 }
 
+bool optional_value_is_null(ZigValue *val) {
+    assert(val->special == ConstValSpecialStatic);
+    if (get_src_ptr_type(val->type) != nullptr) {
+        if (val->data.x_ptr.special == ConstPtrSpecialNull) {
+            return true;
+        } else if (val->data.x_ptr.special == ConstPtrSpecialHardCodedAddr) {
+            return val->data.x_ptr.data.hard_coded_addr.addr == 0;
+        } else {
+            return false;
+        }
+    } else if (is_opt_err_set(val->type)) {
+        return val->data.x_err_set == nullptr;
+    } else {
+        return val->data.x_optional == nullptr;
+    }
+}
+
 bool type_is_numeric(ZigType *ty) {
     switch (ty->id) {
         case ZigTypeIdInvalid:
diff --git a/src/analyze.hpp b/src/analyze.hpp
index fded1e4052..c7cbab4b8c 100644
--- a/src/analyze.hpp
+++ b/src/analyze.hpp
@@ -125,6 +125,7 @@ ScopeLoop *create_loop_scope(CodeGen *g, AstNode *node, Scope *parent);
 ScopeSuspend *create_suspend_scope(CodeGen *g, AstNode *node, Scope *parent);
 ScopeFnDef *create_fndef_scope(CodeGen *g, AstNode *node, Scope *parent, ZigFn *fn_entry);
 Scope *create_comptime_scope(CodeGen *g, AstNode *node, Scope *parent);
+Scope *create_noasync_scope(CodeGen *g, AstNode *node, Scope *parent);
 Scope *create_runtime_scope(CodeGen *g, AstNode *node, Scope *parent, IrInstSrc *is_comptime);
 Scope *create_typeof_scope(CodeGen *g, AstNode *node, Scope *parent);
 ScopeExpr *create_expr_scope(CodeGen *g, AstNode *node, Scope *parent);
@@ -197,6 +198,7 @@ size_t type_id_index(ZigType *entry);
 ZigType *get_generic_fn_type(CodeGen *g, FnTypeId *fn_type_id);
 LinkLib *create_link_lib(Buf *name);
 LinkLib *add_link_lib(CodeGen *codegen, Buf *lib);
+bool optional_value_is_null(ZigValue *val);
 
 uint32_t get_abi_alignment(CodeGen *g, ZigType *type_entry);
 ZigType *get_align_amt_type(CodeGen *g);
@@ -265,6 +267,7 @@ ZigValue *analyze_const_value(CodeGen *g, Scope *scope, AstNode *node, ZigType *
 void resolve_llvm_types_fn(CodeGen *g, ZigFn *fn);
 bool fn_is_async(ZigFn *fn);
 CallingConvention cc_from_fn_proto(AstNodeFnProto *fn_proto);
+bool is_valid_return_type(ZigType* type);
 
 Error type_val_resolve_abi_align(CodeGen *g, AstNode *source_node, ZigValue *type_val, uint32_t *abi_align);
 Error type_val_resolve_abi_size(CodeGen *g, AstNode *source_node, ZigValue *type_val,
diff --git a/src/ast_render.cpp b/src/ast_render.cpp
index d8d0d6c0e2..6bc21ce970 100644
--- a/src/ast_render.cpp
+++ b/src/ast_render.cpp
@@ -220,6 +220,8 @@ static const char *node_type_str(NodeType node_type) {
             return "SwitchRange";
         case NodeTypeCompTime:
             return "CompTime";
+        case NodeTypeNoAsync:
+            return "NoAsync";
         case NodeTypeBreak:
             return "Break";
         case NodeTypeContinue:
@@ -1091,6 +1093,12 @@ static void render_node_extra(AstRender *ar, AstNode *node, bool grouped) {
                 render_node_grouped(ar, node->data.comptime_expr.expr);
                 break;
             }
+        case NodeTypeNoAsync:
+            {
+                fprintf(ar->f, "noasync ");
+                render_node_grouped(ar, node->data.noasync_expr.expr);
+                break;
+            }
         case NodeTypeForExpr:
             {
                 if (node->data.for_expr.name != nullptr) {
diff --git a/src/cache_hash.cpp b/src/cache_hash.cpp
index 35b05a1ddf..3cff34ea5c 100644
--- a/src/cache_hash.cpp
+++ b/src/cache_hash.cpp
@@ -24,11 +24,15 @@ void cache_init(CacheHash *ch, Buf *manifest_dir) {
     ch->b64_digest = BUF_INIT;
 }
 
-void cache_str(CacheHash *ch, const char *ptr) {
+void cache_mem(CacheHash *ch, const char *ptr, size_t len) {
     assert(ch->manifest_file_path == nullptr);
     assert(ptr != nullptr);
     // + 1 to include the null byte
-    blake2b_update(&ch->blake, ptr, strlen(ptr) + 1);
+    blake2b_update(&ch->blake, ptr, len);
+}
+
+void cache_str(CacheHash *ch, const char *ptr) {
+    cache_mem(ch, ptr, strlen(ptr) + 1);
 }
 
 void cache_int(CacheHash *ch, int x) {
diff --git a/src/cache_hash.hpp b/src/cache_hash.hpp
index e2a10270f3..9e4c41b1e0 100644
--- a/src/cache_hash.hpp
+++ b/src/cache_hash.hpp
@@ -35,6 +35,7 @@ struct CacheHash {
 void cache_init(CacheHash *ch, Buf *manifest_dir);
 
 // Next, use the hash population functions to add the initial parameters.
+void cache_mem(CacheHash *ch, const char *ptr, size_t len);
 void cache_str(CacheHash *ch, const char *ptr);
 void cache_int(CacheHash *ch, int x);
 void cache_bool(CacheHash *ch, bool x);
diff --git a/src/codegen.cpp b/src/codegen.cpp
index 25d8672cd4..44add5d1e6 100644
--- a/src/codegen.cpp
+++ b/src/codegen.cpp
@@ -686,6 +686,7 @@ static ZigLLVMDIScope *get_di_scope(CodeGen *g, Scope *scope) {
         case ScopeIdLoop:
         case ScopeIdSuspend:
         case ScopeIdCompTime:
+        case ScopeIdNoAsync:
         case ScopeIdRuntime:
         case ScopeIdTypeOf:
         case ScopeIdExpr:
@@ -967,11 +968,13 @@ static Buf *panic_msg_buf(PanicMsgId msg_id) {
         case PanicMsgIdResumedFnPendingAwait:
             return buf_create_from_str("resumed an async function which can only be awaited");
         case PanicMsgIdBadNoAsyncCall:
-            return buf_create_from_str("async function called with noasync suspended");
+            return buf_create_from_str("async function called in noasync scope suspended");
         case PanicMsgIdResumeNotSuspendedFn:
             return buf_create_from_str("resumed a non-suspended function");
         case PanicMsgIdBadSentinel:
             return buf_create_from_str("sentinel mismatch");
+        case PanicMsgIdShxTooBigRhs:
+            return buf_create_from_str("shift amount is greater than the type size");
     }
     zig_unreachable();
 }
@@ -2836,6 +2839,26 @@ static LLVMValueRef gen_rem(CodeGen *g, bool want_runtime_safety, bool want_fast
 
 }
 
+static void gen_shift_rhs_check(CodeGen *g, ZigType *lhs_type, ZigType *rhs_type, LLVMValueRef value) {
+    // We only check if the rhs value of the shift expression is greater or
+    // equal to the number of bits of the lhs if it's not a power of two,
+    // otherwise the check is useful as the allowed values are limited by the
+    // operand type itself
+    if (!is_power_of_2(lhs_type->data.integral.bit_count)) {
+        LLVMValueRef bit_count_value = LLVMConstInt(get_llvm_type(g, rhs_type),
+            lhs_type->data.integral.bit_count, false);
+        LLVMValueRef less_than_bit = LLVMBuildICmp(g->builder, LLVMIntULT, value, bit_count_value, "");
+        LLVMBasicBlockRef fail_block = LLVMAppendBasicBlock(g->cur_fn_val, "CheckFail");
+        LLVMBasicBlockRef ok_block = LLVMAppendBasicBlock(g->cur_fn_val, "CheckOk");
+        LLVMBuildCondBr(g->builder, less_than_bit, ok_block, fail_block);
+
+        LLVMPositionBuilderAtEnd(g->builder, fail_block);
+        gen_safety_crash(g, PanicMsgIdShxTooBigRhs);
+
+        LLVMPositionBuilderAtEnd(g->builder, ok_block);
+    }
+}
+
 static LLVMValueRef ir_render_bin_op(CodeGen *g, IrExecutableGen *executable,
         IrInstGenBinOp *bin_op_instruction)
 {
@@ -2944,6 +2967,11 @@ static LLVMValueRef ir_render_bin_op(CodeGen *g, IrExecutableGen *executable,
             {
                 assert(scalar_type->id == ZigTypeIdInt);
                 LLVMValueRef op2_casted = gen_widen_or_shorten(g, false, op2->value->type, scalar_type, op2_value);
+
+                if (want_runtime_safety) {
+                    gen_shift_rhs_check(g, scalar_type, op2->value->type, op2_value);
+                }
+
                 bool is_sloppy = (op_id == IrBinOpBitShiftLeftLossy);
                 if (is_sloppy) {
                     return LLVMBuildShl(g->builder, op1_value, op2_casted, "");
@@ -2960,6 +2988,11 @@ static LLVMValueRef ir_render_bin_op(CodeGen *g, IrExecutableGen *executable,
             {
                 assert(scalar_type->id == ZigTypeIdInt);
                 LLVMValueRef op2_casted = gen_widen_or_shorten(g, false, op2->value->type, scalar_type, op2_value);
+
+                if (want_runtime_safety) {
+                    gen_shift_rhs_check(g, scalar_type, op2->value->type, op2_value);
+                }
+
                 bool is_sloppy = (op_id == IrBinOpBitShiftRightLossy);
                 if (is_sloppy) {
                     if (scalar_type->data.integral.is_signed) {
@@ -3930,6 +3963,7 @@ static void render_async_var_decls(CodeGen *g, Scope *scope) {
             case ScopeIdLoop:
             case ScopeIdSuspend:
             case ScopeIdCompTime:
+            case ScopeIdNoAsync:
             case ScopeIdRuntime:
             case ScopeIdTypeOf:
             case ScopeIdExpr:
@@ -5212,11 +5246,55 @@ static enum ZigLLVM_AtomicRMWBinOp to_ZigLLVMAtomicRMWBinOp(AtomicRmwOp op, bool
     zig_unreachable();
 }
 
+static LLVMTypeRef get_atomic_abi_type(CodeGen *g, IrInstGen *instruction) {
+    // If the operand type of an atomic operation is not a power of two sized
+    // we need to widen it before using it and then truncate the result.
+
+    ir_assert(instruction->value->type->id == ZigTypeIdPointer, instruction);
+    ZigType *operand_type = instruction->value->type->data.pointer.child_type;
+    if (operand_type->id == ZigTypeIdInt || operand_type->id == ZigTypeIdEnum) {
+        if (operand_type->id == ZigTypeIdEnum) {
+            operand_type = operand_type->data.enumeration.tag_int_type;
+        }
+        auto bit_count = operand_type->data.integral.bit_count;
+        bool is_signed = operand_type->data.integral.is_signed;
+        
+        ir_assert(bit_count != 0, instruction);
+        if (bit_count == 1 || !is_power_of_2(bit_count)) {
+            return get_llvm_type(g, get_int_type(g, is_signed, operand_type->abi_size * 8));
+        } else {
+            return nullptr;
+        }
+    } else if (operand_type->id == ZigTypeIdFloat) {
+        return nullptr;
+    } else if (operand_type->id == ZigTypeIdBool) {
+        return g->builtin_types.entry_u8->llvm_type;
+    } else {
+        ir_assert(get_codegen_ptr_type_bail(g, operand_type) != nullptr, instruction);
+        return nullptr;
+    }
+}
+
 static LLVMValueRef ir_render_cmpxchg(CodeGen *g, IrExecutableGen *executable, IrInstGenCmpxchg *instruction) {
     LLVMValueRef ptr_val = ir_llvm_value(g, instruction->ptr);
     LLVMValueRef cmp_val = ir_llvm_value(g, instruction->cmp_value);
     LLVMValueRef new_val = ir_llvm_value(g, instruction->new_value);
 
+    ZigType *operand_type = instruction->new_value->value->type;
+    LLVMTypeRef actual_abi_type = get_atomic_abi_type(g, instruction->ptr);
+    if (actual_abi_type != nullptr) {
+        // operand needs widening and truncating
+        ptr_val = LLVMBuildBitCast(g->builder, ptr_val,
+            LLVMPointerType(actual_abi_type, 0), "");
+        if (operand_type->data.integral.is_signed) {
+            cmp_val = LLVMBuildSExt(g->builder, cmp_val, actual_abi_type, "");
+            new_val = LLVMBuildSExt(g->builder, new_val, actual_abi_type, "");
+        } else {
+            cmp_val = LLVMBuildZExt(g->builder, cmp_val, actual_abi_type, "");
+            new_val = LLVMBuildZExt(g->builder, new_val, actual_abi_type, "");
+        }
+    }
+
     LLVMAtomicOrdering success_order = to_LLVMAtomicOrdering(instruction->success_order);
     LLVMAtomicOrdering failure_order = to_LLVMAtomicOrdering(instruction->failure_order);
 
@@ -5229,6 +5307,9 @@ static LLVMValueRef ir_render_cmpxchg(CodeGen *g, IrExecutableGen *executable, I
 
     if (!handle_is_ptr(g, optional_type)) {
         LLVMValueRef payload_val = LLVMBuildExtractValue(g->builder, result_val, 0, "");
+        if (actual_abi_type != nullptr) {
+            payload_val = LLVMBuildTrunc(g->builder, payload_val, get_llvm_type(g, operand_type), "");
+        }
         LLVMValueRef success_bit = LLVMBuildExtractValue(g->builder, result_val, 1, "");
         return LLVMBuildSelect(g->builder, success_bit, LLVMConstNull(get_llvm_type(g, child_type)), payload_val, "");
     }
@@ -5243,6 +5324,9 @@ static LLVMValueRef ir_render_cmpxchg(CodeGen *g, IrExecutableGen *executable, I
     ir_assert(type_has_bits(g, child_type), &instruction->base);
 
     LLVMValueRef payload_val = LLVMBuildExtractValue(g->builder, result_val, 0, "");
+    if (actual_abi_type != nullptr) {
+        payload_val = LLVMBuildTrunc(g->builder, payload_val, get_llvm_type(g, operand_type), "");
+    }
     LLVMValueRef val_ptr = LLVMBuildStructGEP(g->builder, result_loc, maybe_child_index, "");
     gen_assign_raw(g, val_ptr, get_pointer_to_type(g, child_type, false), payload_val);
 
@@ -5820,6 +5904,22 @@ static LLVMValueRef ir_render_atomic_rmw(CodeGen *g, IrExecutableGen *executable
     LLVMValueRef ptr = ir_llvm_value(g, instruction->ptr);
     LLVMValueRef operand = ir_llvm_value(g, instruction->operand);
 
+    LLVMTypeRef actual_abi_type = get_atomic_abi_type(g, instruction->ptr);
+    if (actual_abi_type != nullptr) {
+        // operand needs widening and truncating
+        LLVMValueRef casted_ptr = LLVMBuildBitCast(g->builder, ptr,
+            LLVMPointerType(actual_abi_type, 0), "");
+        LLVMValueRef casted_operand;
+        if (operand_type->data.integral.is_signed) {
+            casted_operand = LLVMBuildSExt(g->builder, operand, actual_abi_type, "");
+        } else {
+            casted_operand = LLVMBuildZExt(g->builder, operand, actual_abi_type, "");
+        }
+        LLVMValueRef uncasted_result = ZigLLVMBuildAtomicRMW(g->builder, op, casted_ptr, casted_operand, ordering,
+                g->is_single_threaded);
+        return LLVMBuildTrunc(g->builder, uncasted_result, get_llvm_type(g, operand_type), "");
+    }
+
     if (get_codegen_ptr_type_bail(g, operand_type) == nullptr) {
         return ZigLLVMBuildAtomicRMW(g->builder, op, ptr, operand, ordering, g->is_single_threaded);
     }
@@ -5838,6 +5938,17 @@ static LLVMValueRef ir_render_atomic_load(CodeGen *g, IrExecutableGen *executabl
 {
     LLVMAtomicOrdering ordering = to_LLVMAtomicOrdering(instruction->ordering);
     LLVMValueRef ptr = ir_llvm_value(g, instruction->ptr);
+
+    ZigType *operand_type = instruction->ptr->value->type->data.pointer.child_type;
+    LLVMTypeRef actual_abi_type = get_atomic_abi_type(g, instruction->ptr);
+    if (actual_abi_type != nullptr) {
+        // operand needs widening and truncating
+        ptr = LLVMBuildBitCast(g->builder, ptr,
+                LLVMPointerType(actual_abi_type, 0), "");
+        LLVMValueRef load_inst = gen_load(g, ptr, instruction->ptr->value->type, "");
+        LLVMSetOrdering(load_inst, ordering);
+        return LLVMBuildTrunc(g->builder, load_inst, get_llvm_type(g, operand_type), "");
+    }
     LLVMValueRef load_inst = gen_load(g, ptr, instruction->ptr->value->type, "");
     LLVMSetOrdering(load_inst, ordering);
     return load_inst;
@@ -5849,6 +5960,18 @@ static LLVMValueRef ir_render_atomic_store(CodeGen *g, IrExecutableGen *executab
     LLVMAtomicOrdering ordering = to_LLVMAtomicOrdering(instruction->ordering);
     LLVMValueRef ptr = ir_llvm_value(g, instruction->ptr);
     LLVMValueRef value = ir_llvm_value(g, instruction->value);
+
+    LLVMTypeRef actual_abi_type = get_atomic_abi_type(g, instruction->ptr);
+    if (actual_abi_type != nullptr) {
+        // operand needs widening
+        ptr = LLVMBuildBitCast(g->builder, ptr,
+                LLVMPointerType(actual_abi_type, 0), "");
+        if (instruction->value->value->type->data.integral.is_signed) {
+            value = LLVMBuildSExt(g->builder, value, actual_abi_type, "");
+        } else {
+            value = LLVMBuildZExt(g->builder, value, actual_abi_type, "");
+        }
+    }
     LLVMValueRef store_inst = gen_store(g, value, ptr, instruction->ptr->value->type);
     LLVMSetOrdering(store_inst, ordering);
     return nullptr;
@@ -6895,8 +7018,18 @@ check: switch (const_val->special) {
         case ZigTypeIdOptional:
             {
                 ZigType *child_type = type_entry->data.maybe.child_type;
+
                 if (get_src_ptr_type(type_entry) != nullptr) {
-                    return gen_const_val_ptr(g, const_val, name);
+                    bool has_bits;
+                    if ((err = type_has_bits2(g, child_type, &has_bits)))
+                        codegen_report_errors_and_exit(g);
+
+                    if (has_bits)
+                        return gen_const_val_ptr(g, const_val, name);
+
+                    // No bits, treat this value as a boolean
+                    const unsigned bool_val = optional_value_is_null(const_val) ? 0 : 1;
+                    return LLVMConstInt(LLVMInt1Type(), bool_val, false);
                 } else if (child_type->id == ZigTypeIdErrorSet) {
                     return gen_const_val_err_set(g, const_val, name);
                 } else if (!type_has_bits(g, child_type)) {
@@ -8614,7 +8747,7 @@ static Error define_builtin_compile_vars(CodeGen *g) {
     cache_int(&cache_hash, g->zig_target->os);
     cache_int(&cache_hash, g->zig_target->abi);
     if (g->zig_target->cache_hash != nullptr) {
-        cache_str(&cache_hash, g->zig_target->cache_hash);
+        cache_mem(&cache_hash, g->zig_target->cache_hash, g->zig_target->cache_hash_len);
     }
     if (g->zig_target->glibc_or_darwin_version != nullptr) {
         cache_int(&cache_hash, g->zig_target->glibc_or_darwin_version->major);
@@ -10259,7 +10392,7 @@ static Error check_cache(CodeGen *g, Buf *manifest_dir, Buf *digest) {
     cache_int(ch, g->zig_target->os);
     cache_int(ch, g->zig_target->abi);
     if (g->zig_target->cache_hash != nullptr) {
-        cache_str(ch, g->zig_target->cache_hash);
+        cache_mem(ch, g->zig_target->cache_hash, g->zig_target->cache_hash_len);
     }
     if (g->zig_target->glibc_or_darwin_version != nullptr) {
         cache_int(ch, g->zig_target->glibc_or_darwin_version->major);
diff --git a/src/install_files.h b/src/install_files.h
index a76ff42a9f..8c81a3fc80 100644
--- a/src/install_files.h
+++ b/src/install_files.h
@@ -80,7 +80,6 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/crypt/crypt.c",
 "musl/src/crypt/crypt_blowfish.c",
 "musl/src/crypt/crypt_des.c",
-"musl/src/crypt/crypt_des.h",
 "musl/src/crypt/crypt_md5.c",
 "musl/src/crypt/crypt_r.c",
 "musl/src/crypt/crypt_sha256.c",
@@ -90,7 +89,6 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/ctype/__ctype_get_mb_cur_max.c",
 "musl/src/ctype/__ctype_tolower_loc.c",
 "musl/src/ctype/__ctype_toupper_loc.c",
-"musl/src/ctype/alpha.h",
 "musl/src/ctype/isalnum.c",
 "musl/src/ctype/isalpha.c",
 "musl/src/ctype/isascii.c",
@@ -117,8 +115,6 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/ctype/iswupper.c",
 "musl/src/ctype/iswxdigit.c",
 "musl/src/ctype/isxdigit.c",
-"musl/src/ctype/nonspacing.h",
-"musl/src/ctype/punct.h",
 "musl/src/ctype/toascii.c",
 "musl/src/ctype/tolower.c",
 "musl/src/ctype/toupper.c",
@@ -126,8 +122,6 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/ctype/wcswidth.c",
 "musl/src/ctype/wctrans.c",
 "musl/src/ctype/wcwidth.c",
-"musl/src/ctype/wide.h",
-"musl/src/dirent/__dirent.h",
 "musl/src/dirent/alphasort.c",
 "musl/src/dirent/closedir.c",
 "musl/src/dirent/dirfd.c",
@@ -152,7 +146,6 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/env/setenv.c",
 "musl/src/env/unsetenv.c",
 "musl/src/errno/__errno_location.c",
-"musl/src/errno/__strerror.h",
 "musl/src/errno/strerror.c",
 "musl/src/exit/_Exit.c",
 "musl/src/exit/abort.c",
@@ -196,55 +189,18 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/fenv/sh/fenv.S",
 "musl/src/fenv/x32/fenv.s",
 "musl/src/fenv/x86_64/fenv.s",
-"musl/src/include/arpa/inet.h",
-"musl/src/include/crypt.h",
-"musl/src/include/errno.h",
-"musl/src/include/features.h",
-"musl/src/include/langinfo.h",
-"musl/src/include/pthread.h",
-"musl/src/include/resolv.h",
-"musl/src/include/signal.h",
-"musl/src/include/stdio.h",
-"musl/src/include/stdlib.h",
-"musl/src/include/string.h",
-"musl/src/include/sys/auxv.h",
-"musl/src/include/sys/membarrier.h",
-"musl/src/include/sys/mman.h",
-"musl/src/include/sys/sysinfo.h",
-"musl/src/include/sys/time.h",
-"musl/src/include/time.h",
-"musl/src/include/unistd.h",
-"musl/src/include/wchar.h",
-"musl/src/internal/atomic.h",
-"musl/src/internal/complex_impl.h",
 "musl/src/internal/defsysinfo.c",
-"musl/src/internal/dynlink.h",
-"musl/src/internal/fdpic_crt.h",
 "musl/src/internal/floatscan.c",
-"musl/src/internal/floatscan.h",
-"musl/src/internal/futex.h",
 "musl/src/internal/i386/defsysinfo.s",
 "musl/src/internal/intscan.c",
-"musl/src/internal/intscan.h",
-"musl/src/internal/ksigaction.h",
 "musl/src/internal/libc.c",
-"musl/src/internal/libc.h",
-"musl/src/internal/libm.h",
-"musl/src/internal/locale_impl.h",
-"musl/src/internal/lock.h",
-"musl/src/internal/malloc_impl.h",
 "musl/src/internal/procfdname.c",
-"musl/src/internal/pthread_impl.h",
 "musl/src/internal/sh/__shcall.c",
 "musl/src/internal/shgetc.c",
-"musl/src/internal/shgetc.h",
-"musl/src/internal/stdio_impl.h",
-"musl/src/internal/syscall.h",
 "musl/src/internal/syscall_ret.c",
 "musl/src/internal/vdso.c",
 "musl/src/internal/version.c",
 "musl/src/ipc/ftok.c",
-"musl/src/ipc/ipc.h",
 "musl/src/ipc/msgctl.c",
 "musl/src/ipc/msgget.c",
 "musl/src/ipc/msgrcv.c",
@@ -261,6 +217,7 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/ldso/aarch64/dlsym.s",
 "musl/src/ldso/aarch64/tlsdesc.s",
 "musl/src/ldso/arm/dlsym.s",
+"musl/src/ldso/arm/dlsym_time64.S",
 "musl/src/ldso/arm/find_exidx.c",
 "musl/src/ldso/arm/tlsdesc.S",
 "musl/src/ldso/dl_iterate_phdr.c",
@@ -271,18 +228,26 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/ldso/dlopen.c",
 "musl/src/ldso/dlsym.c",
 "musl/src/ldso/i386/dlsym.s",
+"musl/src/ldso/i386/dlsym_time64.S",
 "musl/src/ldso/i386/tlsdesc.s",
 "musl/src/ldso/m68k/dlsym.s",
+"musl/src/ldso/m68k/dlsym_time64.S",
 "musl/src/ldso/microblaze/dlsym.s",
+"musl/src/ldso/microblaze/dlsym_time64.S",
 "musl/src/ldso/mips/dlsym.s",
+"musl/src/ldso/mips/dlsym_time64.S",
 "musl/src/ldso/mips64/dlsym.s",
 "musl/src/ldso/mipsn32/dlsym.s",
+"musl/src/ldso/mipsn32/dlsym_time64.S",
 "musl/src/ldso/or1k/dlsym.s",
+"musl/src/ldso/or1k/dlsym_time64.S",
 "musl/src/ldso/powerpc/dlsym.s",
+"musl/src/ldso/powerpc/dlsym_time64.S",
 "musl/src/ldso/powerpc64/dlsym.s",
 "musl/src/ldso/riscv64/dlsym.s",
 "musl/src/ldso/s390x/dlsym.s",
 "musl/src/ldso/sh/dlsym.s",
+"musl/src/ldso/sh/dlsym_time64.S",
 "musl/src/ldso/tlsdesc.c",
 "musl/src/ldso/x32/dlsym.s",
 "musl/src/ldso/x86_64/dlsym.s",
@@ -369,30 +334,21 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/linux/xattr.c",
 "musl/src/locale/__lctrans.c",
 "musl/src/locale/__mo_lookup.c",
-"musl/src/locale/big5.h",
 "musl/src/locale/bind_textdomain_codeset.c",
 "musl/src/locale/c_locale.c",
 "musl/src/locale/catclose.c",
 "musl/src/locale/catgets.c",
 "musl/src/locale/catopen.c",
-"musl/src/locale/codepages.h",
 "musl/src/locale/dcngettext.c",
 "musl/src/locale/duplocale.c",
 "musl/src/locale/freelocale.c",
-"musl/src/locale/gb18030.h",
-"musl/src/locale/hkscs.h",
 "musl/src/locale/iconv.c",
 "musl/src/locale/iconv_close.c",
-"musl/src/locale/jis0208.h",
-"musl/src/locale/ksc.h",
 "musl/src/locale/langinfo.c",
-"musl/src/locale/legacychars.h",
 "musl/src/locale/locale_map.c",
 "musl/src/locale/localeconv.c",
 "musl/src/locale/newlocale.c",
 "musl/src/locale/pleval.c",
-"musl/src/locale/pleval.h",
-"musl/src/locale/revjis.h",
 "musl/src/locale/setlocale.c",
 "musl/src/locale/strcoll.c",
 "musl/src/locale/strfmon.c",
@@ -401,7 +357,6 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/locale/uselocale.c",
 "musl/src/locale/wcscoll.c",
 "musl/src/locale/wcsxfrm.c",
-"musl/src/malloc/DESIGN",
 "musl/src/malloc/aligned_alloc.c",
 "musl/src/malloc/expand_heap.c",
 "musl/src/malloc/lite_malloc.c",
@@ -418,7 +373,6 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/math/__fpclassifyf.c",
 "musl/src/math/__fpclassifyl.c",
 "musl/src/math/__invtrigl.c",
-"musl/src/math/__invtrigl.h",
 "musl/src/math/__math_divzero.c",
 "musl/src/math/__math_divzerof.c",
 "musl/src/math/__math_invalid.c",
@@ -525,10 +479,8 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/math/exp2.c",
 "musl/src/math/exp2f.c",
 "musl/src/math/exp2f_data.c",
-"musl/src/math/exp2f_data.h",
 "musl/src/math/exp2l.c",
 "musl/src/math/exp_data.c",
-"musl/src/math/exp_data.h",
 "musl/src/math/expf.c",
 "musl/src/math/expl.c",
 "musl/src/math/expm1.c",
@@ -579,14 +531,9 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/math/i386/ceil.s",
 "musl/src/math/i386/ceilf.s",
 "musl/src/math/i386/ceill.s",
-"musl/src/math/i386/exp.s",
-"musl/src/math/i386/exp2.s",
-"musl/src/math/i386/exp2f.s",
 "musl/src/math/i386/exp2l.s",
-"musl/src/math/i386/expf.s",
+"musl/src/math/i386/exp_ld.s",
 "musl/src/math/i386/expl.s",
-"musl/src/math/i386/expm1.s",
-"musl/src/math/i386/expm1f.s",
 "musl/src/math/i386/expm1l.s",
 "musl/src/math/i386/fabs.s",
 "musl/src/math/i386/fabsf.s",
@@ -673,19 +620,15 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/math/log1pl.c",
 "musl/src/math/log2.c",
 "musl/src/math/log2_data.c",
-"musl/src/math/log2_data.h",
 "musl/src/math/log2f.c",
 "musl/src/math/log2f_data.c",
-"musl/src/math/log2f_data.h",
 "musl/src/math/log2l.c",
 "musl/src/math/log_data.c",
-"musl/src/math/log_data.h",
 "musl/src/math/logb.c",
 "musl/src/math/logbf.c",
 "musl/src/math/logbl.c",
 "musl/src/math/logf.c",
 "musl/src/math/logf_data.c",
-"musl/src/math/logf_data.h",
 "musl/src/math/logl.c",
 "musl/src/math/lrint.c",
 "musl/src/math/lrintf.c",
@@ -693,6 +636,10 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/math/lround.c",
 "musl/src/math/lroundf.c",
 "musl/src/math/lroundl.c",
+"musl/src/math/mips/fabs.c",
+"musl/src/math/mips/fabsf.c",
+"musl/src/math/mips/sqrt.c",
+"musl/src/math/mips/sqrtf.c",
 "musl/src/math/modf.c",
 "musl/src/math/modff.c",
 "musl/src/math/modfl.c",
@@ -710,7 +657,6 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/math/nexttowardl.c",
 "musl/src/math/pow.c",
 "musl/src/math/pow_data.c",
-"musl/src/math/pow_data.h",
 "musl/src/math/powerpc/fabs.c",
 "musl/src/math/powerpc/fabsf.c",
 "musl/src/math/powerpc/fma.c",
@@ -741,7 +687,6 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/math/powerpc64/truncf.c",
 "musl/src/math/powf.c",
 "musl/src/math/powf_data.c",
-"musl/src/math/powf_data.h",
 "musl/src/math/powl.c",
 "musl/src/math/remainder.c",
 "musl/src/math/remainderf.c",
@@ -958,7 +903,6 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/multibyte/c16rtomb.c",
 "musl/src/multibyte/c32rtomb.c",
 "musl/src/multibyte/internal.c",
-"musl/src/multibyte/internal.h",
 "musl/src/multibyte/mblen.c",
 "musl/src/multibyte/mbrlen.c",
 "musl/src/multibyte/mbrtoc16.c",
@@ -1021,12 +965,10 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/network/inet_ntop.c",
 "musl/src/network/inet_pton.c",
 "musl/src/network/listen.c",
-"musl/src/network/lookup.h",
 "musl/src/network/lookup_ipliteral.c",
 "musl/src/network/lookup_name.c",
 "musl/src/network/lookup_serv.c",
 "musl/src/network/netlink.c",
-"musl/src/network/netlink.h",
 "musl/src/network/netname.c",
 "musl/src/network/ns_parse.c",
 "musl/src/network/ntohl.c",
@@ -1070,12 +1012,10 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/passwd/getspnam.c",
 "musl/src/passwd/getspnam_r.c",
 "musl/src/passwd/lckpwdf.c",
-"musl/src/passwd/nscd.h",
 "musl/src/passwd/nscd_query.c",
 "musl/src/passwd/putgrent.c",
 "musl/src/passwd/putpwent.c",
 "musl/src/passwd/putspent.c",
-"musl/src/passwd/pwf.h",
 "musl/src/prng/__rand48_step.c",
 "musl/src/prng/__seed48.c",
 "musl/src/prng/drand48.c",
@@ -1083,7 +1023,6 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/prng/lrand48.c",
 "musl/src/prng/mrand48.c",
 "musl/src/prng/rand.c",
-"musl/src/prng/rand48.h",
 "musl/src/prng/rand_r.c",
 "musl/src/prng/random.c",
 "musl/src/prng/seed48.c",
@@ -1095,7 +1034,6 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/process/execv.c",
 "musl/src/process/execve.c",
 "musl/src/process/execvp.c",
-"musl/src/process/fdop.h",
 "musl/src/process/fexecve.c",
 "musl/src/process/fork.c",
 "musl/src/process/i386/vfork.s",
@@ -1134,7 +1072,6 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/regex/regerror.c",
 "musl/src/regex/regexec.c",
 "musl/src/regex/tre-mem.c",
-"musl/src/regex/tre.h",
 "musl/src/sched/affinity.c",
 "musl/src/sched/sched_cpucount.c",
 "musl/src/sched/sched_get_priority_max.c",
@@ -1152,7 +1089,6 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/search/tdestroy.c",
 "musl/src/search/tfind.c",
 "musl/src/search/tsearch.c",
-"musl/src/search/tsearch.h",
 "musl/src/search/twalk.c",
 "musl/src/select/poll.c",
 "musl/src/select/pselect.c",
@@ -1335,7 +1271,6 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/stdio/fwrite.c",
 "musl/src/stdio/fwscanf.c",
 "musl/src/stdio/getc.c",
-"musl/src/stdio/getc.h",
 "musl/src/stdio/getc_unlocked.c",
 "musl/src/stdio/getchar.c",
 "musl/src/stdio/getchar_unlocked.c",
@@ -1354,7 +1289,6 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/stdio/popen.c",
 "musl/src/stdio/printf.c",
 "musl/src/stdio/putc.c",
-"musl/src/stdio/putc.h",
 "musl/src/stdio/putc_unlocked.c",
 "musl/src/stdio/putchar.c",
 "musl/src/stdio/putchar_unlocked.c",
@@ -1746,7 +1680,6 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/time/strftime.c",
 "musl/src/time/strptime.c",
 "musl/src/time/time.c",
-"musl/src/time/time_impl.h",
 "musl/src/time/timegm.c",
 "musl/src/time/timer_create.c",
 "musl/src/time/timer_delete.c",
@@ -1843,4 +1776,69 @@ static const char *ZIG_MUSL_SRC_FILES[] = {
 "musl/src/unistd/writev.c",
 "musl/src/unistd/x32/lseek.c",
 };
+static const char *ZIG_MUSL_COMPAT_TIME32_FILES[] = {
+"musl/compat/time32/__xstat.c",
+"musl/compat/time32/adjtime32.c",
+"musl/compat/time32/adjtimex_time32.c",
+"musl/compat/time32/aio_suspend_time32.c",
+"musl/compat/time32/clock_adjtime32.c",
+"musl/compat/time32/clock_getres_time32.c",
+"musl/compat/time32/clock_gettime32.c",
+"musl/compat/time32/clock_nanosleep_time32.c",
+"musl/compat/time32/clock_settime32.c",
+"musl/compat/time32/cnd_timedwait_time32.c",
+"musl/compat/time32/ctime32.c",
+"musl/compat/time32/ctime32_r.c",
+"musl/compat/time32/difftime32.c",
+"musl/compat/time32/fstat_time32.c",
+"musl/compat/time32/fstatat_time32.c",
+"musl/compat/time32/ftime32.c",
+"musl/compat/time32/futimens_time32.c",
+"musl/compat/time32/futimes_time32.c",
+"musl/compat/time32/futimesat_time32.c",
+"musl/compat/time32/getitimer_time32.c",
+"musl/compat/time32/getrusage_time32.c",
+"musl/compat/time32/gettimeofday_time32.c",
+"musl/compat/time32/gmtime32.c",
+"musl/compat/time32/gmtime32_r.c",
+"musl/compat/time32/localtime32.c",
+"musl/compat/time32/localtime32_r.c",
+"musl/compat/time32/lstat_time32.c",
+"musl/compat/time32/lutimes_time32.c",
+"musl/compat/time32/mktime32.c",
+"musl/compat/time32/mq_timedreceive_time32.c",
+"musl/compat/time32/mq_timedsend_time32.c",
+"musl/compat/time32/mtx_timedlock_time32.c",
+"musl/compat/time32/nanosleep_time32.c",
+"musl/compat/time32/ppoll_time32.c",
+"musl/compat/time32/pselect_time32.c",
+"musl/compat/time32/pthread_cond_timedwait_time32.c",
+"musl/compat/time32/pthread_mutex_timedlock_time32.c",
+"musl/compat/time32/pthread_rwlock_timedrdlock_time32.c",
+"musl/compat/time32/pthread_rwlock_timedwrlock_time32.c",
+"musl/compat/time32/pthread_timedjoin_np_time32.c",
+"musl/compat/time32/recvmmsg_time32.c",
+"musl/compat/time32/sched_rr_get_interval_time32.c",
+"musl/compat/time32/select_time32.c",
+"musl/compat/time32/sem_timedwait_time32.c",
+"musl/compat/time32/semtimedop_time32.c",
+"musl/compat/time32/setitimer_time32.c",
+"musl/compat/time32/settimeofday_time32.c",
+"musl/compat/time32/sigtimedwait_time32.c",
+"musl/compat/time32/stat_time32.c",
+"musl/compat/time32/stime32.c",
+"musl/compat/time32/thrd_sleep_time32.c",
+"musl/compat/time32/time32.c",
+"musl/compat/time32/time32gm.c",
+"musl/compat/time32/timer_gettime32.c",
+"musl/compat/time32/timer_settime32.c",
+"musl/compat/time32/timerfd_gettime32.c",
+"musl/compat/time32/timerfd_settime32.c",
+"musl/compat/time32/timespec_get_time32.c",
+"musl/compat/time32/utime_time32.c",
+"musl/compat/time32/utimensat_time32.c",
+"musl/compat/time32/utimes_time32.c",
+"musl/compat/time32/wait3_time32.c",
+"musl/compat/time32/wait4_time32.c",
+};
 #endif
diff --git a/src/ir.cpp b/src/ir.cpp
index 4068247b72..72e2a3fd98 100644
--- a/src/ir.cpp
+++ b/src/ir.cpp
@@ -4978,6 +4978,7 @@ static void ir_count_defers(IrBuilderSrc *irb, Scope *inner_scope, Scope *outer_
             case ScopeIdLoop:
             case ScopeIdSuspend:
             case ScopeIdCompTime:
+            case ScopeIdNoAsync:
             case ScopeIdRuntime:
             case ScopeIdTypeOf:
             case ScopeIdExpr:
@@ -5033,6 +5034,7 @@ static bool ir_gen_defers_for_block(IrBuilderSrc *irb, Scope *inner_scope, Scope
             case ScopeIdLoop:
             case ScopeIdSuspend:
             case ScopeIdCompTime:
+            case ScopeIdNoAsync:
             case ScopeIdRuntime:
             case ScopeIdTypeOf:
             case ScopeIdExpr:
@@ -5910,10 +5912,18 @@ static IrInstSrc *ir_gen_array_access(IrBuilderSrc *irb, Scope *scope, AstNode *
     if (array_ref_instruction == irb->codegen->invalid_inst_src)
         return array_ref_instruction;
 
+    // Create an usize-typed result location to hold the subscript value, this
+    // makes it possible for the compiler to infer the subscript expression type
+    // if needed
+    IrInstSrc *usize_type_inst = ir_build_const_type(irb, scope, node, irb->codegen->builtin_types.entry_usize);
+    ResultLocCast *result_loc_cast = ir_build_cast_result_loc(irb, usize_type_inst, no_result_loc());
+
     AstNode *subscript_node = node->data.array_access_expr.subscript;
-    IrInstSrc *subscript_instruction = ir_gen_node(irb, subscript_node, scope);
-    if (subscript_instruction == irb->codegen->invalid_inst_src)
-        return subscript_instruction;
+    IrInstSrc *subscript_value = ir_gen_node_extra(irb, subscript_node, scope, LValNone, &result_loc_cast->base);
+    if (subscript_value == irb->codegen->invalid_inst_src)
+        return irb->codegen->invalid_inst_src;
+
+    IrInstSrc *subscript_instruction = ir_build_implicit_cast(irb, scope, subscript_node, subscript_value, result_loc_cast);
 
     IrInstSrc *ptr_instruction = ir_build_elem_ptr(irb, scope, node, array_ref_instruction,
             subscript_instruction, true, PtrLenSingle, nullptr);
@@ -7266,6 +7276,18 @@ static IrInstSrc *ir_gen_builtin_fn_call(IrBuilderSrc *irb, Scope *scope, AstNod
     zig_unreachable();
 }
 
+static ScopeNoAsync *get_scope_noasync(Scope *scope) {
+    while (scope) {
+        if (scope->id == ScopeIdNoAsync)
+            return (ScopeNoAsync *)scope;
+        if (scope->id == ScopeIdFnDef)
+            return nullptr;
+
+        scope = scope->parent;
+    }
+    return nullptr;
+}
+
 static IrInstSrc *ir_gen_fn_call(IrBuilderSrc *irb, Scope *scope, AstNode *node, LVal lval,
         ResultLoc *result_loc)
 {
@@ -7274,8 +7296,19 @@ static IrInstSrc *ir_gen_fn_call(IrBuilderSrc *irb, Scope *scope, AstNode *node,
     if (node->data.fn_call_expr.modifier == CallModifierBuiltin)
         return ir_gen_builtin_fn_call(irb, scope, node, lval, result_loc);
 
+    bool is_noasync = get_scope_noasync(scope) != nullptr;
+    CallModifier modifier = node->data.fn_call_expr.modifier;
+    if (is_noasync) {
+        if (modifier == CallModifierAsync) {
+            add_node_error(irb->codegen, node,
+                    buf_sprintf("async call in noasync scope"));
+            return irb->codegen->invalid_inst_src;
+        }
+        modifier = CallModifierNoAsync;
+    }
+
     AstNode *fn_ref_node = node->data.fn_call_expr.fn_ref_expr;
-    return ir_gen_fn_call_with_args(irb, scope, node, fn_ref_node, node->data.fn_call_expr.modifier,
+    return ir_gen_fn_call_with_args(irb, scope, node, fn_ref_node, modifier,
         nullptr, node->data.fn_call_expr.params.items, node->data.fn_call_expr.params.length, lval, result_loc);
 }
 
@@ -8981,7 +9014,7 @@ static IrInstSrc *ir_gen_switch_expr(IrBuilderSrc *irb, Scope *scope, AstNode *n
                     return irb->codegen->invalid_inst_src;
                 }
                 else_prong = prong_node;
-            } else if (prong_item_count == 1 && 
+            } else if (prong_item_count == 1 &&
                     prong_node->data.switch_prong.items.at(0)->type == NodeTypeSymbol &&
                     buf_eql_str(prong_node->data.switch_prong.items.at(0)->data.symbol_expr.symbol, "_")) {
                 if (underscore_prong) {
@@ -9129,6 +9162,14 @@ static IrInstSrc *ir_gen_comptime(IrBuilderSrc *irb, Scope *parent_scope, AstNod
     return ir_gen_node_extra(irb, node->data.comptime_expr.expr, child_scope, lval, nullptr);
 }
 
+static IrInstSrc *ir_gen_noasync(IrBuilderSrc *irb, Scope *parent_scope, AstNode *node, LVal lval) {
+    assert(node->type == NodeTypeNoAsync);
+
+    Scope *child_scope = create_noasync_scope(irb->codegen, node, parent_scope);
+    // purposefully pass null for result_loc and let EndExpr handle it
+    return ir_gen_node_extra(irb, node->data.comptime_expr.expr, child_scope, lval, nullptr);
+}
+
 static IrInstSrc *ir_gen_return_from_block(IrBuilderSrc *irb, Scope *break_scope, AstNode *node, ScopeBlock *block_scope) {
     IrInstSrc *is_comptime;
     if (ir_should_inline(irb->exec, break_scope)) {
@@ -9709,6 +9750,10 @@ static IrInstSrc *ir_gen_fn_proto(IrBuilderSrc *irb, Scope *parent_scope, AstNod
 
 static IrInstSrc *ir_gen_resume(IrBuilderSrc *irb, Scope *scope, AstNode *node) {
     assert(node->type == NodeTypeResume);
+    if (get_scope_noasync(scope) != nullptr) {
+        add_node_error(irb->codegen, node, buf_sprintf("resume in noasync scope"));
+        return irb->codegen->invalid_inst_src;
+    }
 
     IrInstSrc *target_inst = ir_gen_node_extra(irb, node->data.resume_expr.expr, scope, LValPtr, nullptr);
     if (target_inst == irb->codegen->invalid_inst_src)
@@ -9722,7 +9767,7 @@ static IrInstSrc *ir_gen_await_expr(IrBuilderSrc *irb, Scope *scope, AstNode *no
 {
     assert(node->type == NodeTypeAwaitExpr);
 
-    bool is_noasync = node->data.await_expr.noasync_token != nullptr;
+    bool is_noasync = get_scope_noasync(scope) != nullptr;
 
     AstNode *expr_node = node->data.await_expr.expr;
     if (expr_node->type == NodeTypeFnCallExpr && expr_node->data.fn_call_expr.modifier == CallModifierBuiltin) {
@@ -9768,6 +9813,11 @@ static IrInstSrc *ir_gen_suspend(IrBuilderSrc *irb, Scope *parent_scope, AstNode
         add_node_error(irb->codegen, node, buf_sprintf("suspend outside function definition"));
         return irb->codegen->invalid_inst_src;
     }
+    if (get_scope_noasync(parent_scope) != nullptr) {
+        add_node_error(irb->codegen, node, buf_sprintf("suspend in noasync scope"));
+        return irb->codegen->invalid_inst_src;
+    }
+
     ScopeSuspend *existing_suspend_scope = get_scope_suspend(parent_scope);
     if (existing_suspend_scope) {
         if (!existing_suspend_scope->reported_err) {
@@ -9897,6 +9947,8 @@ static IrInstSrc *ir_gen_node_raw(IrBuilderSrc *irb, AstNode *node, Scope *scope
             return ir_gen_switch_expr(irb, scope, node, lval, result_loc);
         case NodeTypeCompTime:
             return ir_expr_wrap(irb, scope, ir_gen_comptime(irb, scope, node, lval), result_loc);
+        case NodeTypeNoAsync:
+            return ir_expr_wrap(irb, scope, ir_gen_noasync(irb, scope, node, lval), result_loc);
         case NodeTypeErrorType:
             return ir_lval_wrap(irb, scope, ir_gen_error_type(irb, scope, node), lval, result_loc);
         case NodeTypeBreak:
@@ -15393,23 +15445,6 @@ static bool resolve_cmp_op_id(IrBinOp op_id, Cmp cmp) {
     }
 }
 
-static bool optional_value_is_null(ZigValue *val) {
-    assert(val->special == ConstValSpecialStatic);
-    if (get_src_ptr_type(val->type) != nullptr) {
-        if (val->data.x_ptr.special == ConstPtrSpecialNull) {
-            return true;
-        } else if (val->data.x_ptr.special == ConstPtrSpecialHardCodedAddr) {
-            return val->data.x_ptr.data.hard_coded_addr.addr == 0;
-        } else {
-            return false;
-        }
-    } else if (is_opt_err_set(val->type)) {
-        return val->data.x_err_set == nullptr;
-    } else {
-        return val->data.x_optional == nullptr;
-    }
-}
-
 static void set_optional_value_to_null(ZigValue *val) {
     assert(val->special == ConstValSpecialStatic);
     if (val->type->id == ZigTypeIdNull) return; // nothing to do
@@ -15524,9 +15559,20 @@ static Error lazy_cmp_zero(CodeGen *codegen, AstNode *source_node, ZigValue *val
             switch (val->data.x_lazy->id) {
                 case LazyValueIdInvalid:
                     zig_unreachable();
-                case LazyValueIdAlignOf:
-                    *result = CmpGT;
+                case LazyValueIdAlignOf: {
+                    LazyValueAlignOf *lazy_align_of = reinterpret_cast<LazyValueAlignOf *>(val->data.x_lazy);
+                    IrAnalyze *ira = lazy_align_of->ira;
+
+                    bool is_zero_bits;
+                    if ((err = type_val_resolve_zero_bits(ira->codegen, lazy_align_of->target_type->value,
+                                    nullptr, nullptr, &is_zero_bits)))
+                    {
+                        return err;
+                    }
+
+                    *result = is_zero_bits ? CmpEQ : CmpGT;
                     return ErrorNone;
+                }
                 case LazyValueIdSizeOf: {
                     LazyValueSizeOf *lazy_size_of = reinterpret_cast<LazyValueSizeOf *>(val->data.x_lazy);
                     IrAnalyze *ira = lazy_size_of->ira;
@@ -16556,49 +16602,69 @@ static IrInstGen *ir_analyze_bit_shift(IrAnalyze *ira, IrInstSrcBinOp *bin_op_in
     IrInstGen *casted_op2;
     IrBinOp op_id = bin_op_instruction->op_id;
     if (op1->value->type->id == ZigTypeIdComptimeInt) {
+        // comptime_int has no finite bit width
         casted_op2 = op2;
 
         if (op_id == IrBinOpBitShiftLeftLossy) {
             op_id = IrBinOpBitShiftLeftExact;
         }
 
-        if (casted_op2->value->data.x_bigint.is_negative) {
+        if (!instr_is_comptime(op2)) {
+            ir_add_error(ira, &bin_op_instruction->base.base,
+                buf_sprintf("LHS of shift must be an integer type, or RHS must be compile-time known"));
+            return ira->codegen->invalid_inst_gen;
+        }
+
+        ZigValue *op2_val = ir_resolve_const(ira, casted_op2, UndefBad);
+        if (op2_val == nullptr)
+            return ira->codegen->invalid_inst_gen;
+
+        if (op2_val->data.x_bigint.is_negative) {
             Buf *val_buf = buf_alloc();
-            bigint_append_buf(val_buf, &casted_op2->value->data.x_bigint, 10);
-            ir_add_error(ira, &casted_op2->base, buf_sprintf("shift by negative value %s", buf_ptr(val_buf)));
+            bigint_append_buf(val_buf, &op2_val->data.x_bigint, 10);
+            ir_add_error(ira, &casted_op2->base,
+                buf_sprintf("shift by negative value %s", buf_ptr(val_buf)));
             return ira->codegen->invalid_inst_gen;
         }
     } else {
+        const unsigned bit_count = op1->value->type->data.integral.bit_count;
         ZigType *shift_amt_type = get_smallest_unsigned_int_type(ira->codegen,
-                op1->value->type->data.integral.bit_count - 1);
-        if (bin_op_instruction->op_id == IrBinOpBitShiftLeftLossy &&
-            op2->value->type->id == ZigTypeIdComptimeInt) {
-
-            ZigValue *op2_val = ir_resolve_const(ira, op2, UndefBad);
-            if (op2_val == nullptr)
-                return ira->codegen->invalid_inst_gen;
-            if (!bigint_fits_in_bits(&op2_val->data.x_bigint,
-                                     shift_amt_type->data.integral.bit_count,
-                                     op2_val->data.x_bigint.is_negative)) {
-                Buf *val_buf = buf_alloc();
-                bigint_append_buf(val_buf, &op2_val->data.x_bigint, 10);
-                ErrorMsg* msg = ir_add_error(ira,
-                    &bin_op_instruction->base.base,
-                    buf_sprintf("RHS of shift is too large for LHS type"));
-                add_error_note(
-                    ira->codegen,
-                    msg,
-                    op2->base.source_node,
-                    buf_sprintf("value %s cannot fit into type %s",
-                        buf_ptr(val_buf),
-                        buf_ptr(&shift_amt_type->name)));
-                return ira->codegen->invalid_inst_gen;
-            }
-        }
+            bit_count > 0 ? bit_count - 1 : 0);
 
         casted_op2 = ir_implicit_cast(ira, op2, shift_amt_type);
         if (type_is_invalid(casted_op2->value->type))
             return ira->codegen->invalid_inst_gen;
+
+        // This check is only valid iff op1 has at least one bit
+        if (bit_count > 0 && instr_is_comptime(casted_op2)) {
+            ZigValue *op2_val = ir_resolve_const(ira, casted_op2, UndefBad);
+            if (op2_val == nullptr)
+                return ira->codegen->invalid_inst_gen;
+
+            BigInt bit_count_value = {0};
+            bigint_init_unsigned(&bit_count_value, bit_count);
+
+            if (bigint_cmp(&op2_val->data.x_bigint, &bit_count_value) != CmpLT) {
+                ErrorMsg* msg = ir_add_error(ira,
+                    &bin_op_instruction->base.base,
+                    buf_sprintf("RHS of shift is too large for LHS type"));
+                add_error_note(ira->codegen, msg, op1->base.source_node,
+                    buf_sprintf("type %s has only %u bits",
+                        buf_ptr(&op1->value->type->name), bit_count));
+
+                return ira->codegen->invalid_inst_gen;
+            }
+        }
+    }
+
+    // Fast path for zero RHS
+    if (instr_is_comptime(casted_op2)) {
+        ZigValue *op2_val = ir_resolve_const(ira, casted_op2, UndefBad);
+        if (op2_val == nullptr)
+            return ira->codegen->invalid_inst_gen;
+
+        if (bigint_cmp_zero(&op2_val->data.x_bigint) == CmpEQ)
+            return ir_analyze_cast(ira, &bin_op_instruction->base.base, op1->value->type, op1);
     }
 
     if (instr_is_comptime(op1) && instr_is_comptime(casted_op2)) {
@@ -16611,12 +16677,6 @@ static IrInstGen *ir_analyze_bit_shift(IrAnalyze *ira, IrInstSrcBinOp *bin_op_in
             return ira->codegen->invalid_inst_gen;
 
         return ir_analyze_math_op(ira, &bin_op_instruction->base.base, op1->value->type, op1_val, op_id, op2_val);
-    } else if (op1->value->type->id == ZigTypeIdComptimeInt) {
-        ir_add_error(ira, &bin_op_instruction->base.base,
-                buf_sprintf("LHS of shift must be an integer type, or RHS must be compile-time known"));
-        return ira->codegen->invalid_inst_gen;
-    } else if (instr_is_comptime(casted_op2) && bigint_cmp_zero(&casted_op2->value->data.x_bigint) == CmpEQ) {
-        return ir_build_cast(ira, &bin_op_instruction->base.base, op1->value->type, op1, CastOpNoop);
     }
 
     return ir_build_bin_op_gen(ira, &bin_op_instruction->base.base, op1->value->type,
@@ -17498,7 +17558,14 @@ static IrInstGen *ir_analyze_instruction_decl_var(IrAnalyze *ira, IrInstSrcDeclV
 
     ZigValue *init_val = nullptr;
     if (instr_is_comptime(var_ptr) && var_ptr->value->data.x_ptr.mut != ConstPtrMutRuntimeVar) {
-        init_val = const_ptr_pointee(ira, ira->codegen, var_ptr->value, decl_var_instruction->base.base.source_node);
+        ZigValue *ptr_val = ir_resolve_const(ira, var_ptr, UndefBad);
+        if (ptr_val == nullptr)
+            return ira->codegen->invalid_inst_gen;
+
+        init_val = const_ptr_pointee(ira, ira->codegen, ptr_val, decl_var_instruction->base.base.source_node);
+        if (init_val == nullptr)
+            return ira->codegen->invalid_inst_gen;
+
         if (is_comptime_var) {
             if (var->gen_is_const) {
                 var->const_value = init_val;
@@ -19306,6 +19373,19 @@ static IrInstGen *ir_analyze_fn_call(IrAnalyze *ira, IrInst* source_instr,
             ZigType *specified_return_type = ir_analyze_type_expr(ira, impl_fn->child_scope, return_type_node);
             if (type_is_invalid(specified_return_type))
                 return ira->codegen->invalid_inst_gen;
+
+            if(!is_valid_return_type(specified_return_type)){
+                ErrorMsg *msg = ir_add_error(ira, source_instr,
+                    buf_sprintf("call to generic function with %s return type '%s' not allowed", type_id_name(specified_return_type->id), buf_ptr(&specified_return_type->name)));
+                add_error_note(ira->codegen, msg, fn_proto_node, buf_sprintf("function declared here"));
+
+                Tld *tld = find_decl(ira->codegen, &fn_entry->fndef_scope->base, &specified_return_type->name);
+                if (tld != nullptr) {
+                    add_error_note(ira->codegen, msg, tld->source_node, buf_sprintf("type declared here"));
+                }
+                return ira->codegen->invalid_inst_gen;
+            }
+
             if (fn_proto_node->data.fn_proto.auto_err_set) {
                 ZigType *inferred_err_set_type = get_auto_err_set_type(ira->codegen, impl_fn);
                 if ((err = type_resolve(ira->codegen, specified_return_type, ResolveStatusSizeKnown)))
@@ -25095,12 +25175,50 @@ static IrInstGen *ir_analyze_instruction_cmpxchg(IrAnalyze *ira, IrInstSrcCmpxch
         return ira->codegen->invalid_inst_gen;
     }
 
-    if (instr_is_comptime(casted_ptr) && casted_ptr->value->data.x_ptr.mut != ConstPtrMutRuntimeVar &&
-        instr_is_comptime(casted_cmp_value) && instr_is_comptime(casted_new_value)) {
-        zig_panic("TODO compile-time execution of cmpxchg");
+    ZigType *result_type = get_optional_type(ira->codegen, operand_type);
+
+    // special case zero bit types
+    switch (type_has_one_possible_value(ira->codegen, operand_type)) {
+        case OnePossibleValueInvalid:
+            return ira->codegen->invalid_inst_gen;
+        case OnePossibleValueYes: {
+            IrInstGen *result = ir_const(ira, &instruction->base.base, result_type);
+            set_optional_value_to_null(result->value);
+            return result;
+        }
+        case OnePossibleValueNo:
+            break;
+    }
+
+    if (instr_is_comptime(casted_ptr) && casted_ptr->value->data.x_ptr.mut != ConstPtrMutRuntimeVar &&
+        instr_is_comptime(casted_cmp_value) && instr_is_comptime(casted_new_value)) {
+        ZigValue *ptr_val = ir_resolve_const(ira, casted_ptr, UndefBad);
+        if (ptr_val == nullptr)
+            return ira->codegen->invalid_inst_gen;
+
+        ZigValue *stored_val = const_ptr_pointee(ira, ira->codegen, ptr_val, instruction->base.base.source_node);
+        if (stored_val == nullptr)
+            return ira->codegen->invalid_inst_gen;
+
+        ZigValue *expected_val = ir_resolve_const(ira, casted_cmp_value, UndefBad);
+        if (expected_val == nullptr)
+            return ira->codegen->invalid_inst_gen;
+
+        ZigValue *new_val = ir_resolve_const(ira, casted_new_value, UndefBad);
+        if (new_val == nullptr)
+            return ira->codegen->invalid_inst_gen;
+
+        bool eql = const_values_equal(ira->codegen, stored_val, expected_val);
+        IrInstGen *result = ir_const(ira, &instruction->base.base, result_type);
+        if (eql) {
+            copy_const_val(ira->codegen, stored_val, new_val);
+            set_optional_value_to_null(result->value);
+        } else {
+            set_optional_payload(result->value, stored_val);
+        }
+        return result;
     }
 
-    ZigType *result_type = get_optional_type(ira->codegen, operand_type);
     IrInstGen *result_loc;
     if (handle_is_ptr(ira->codegen, result_type)) {
         result_loc = ir_resolve_result(ira, &instruction->base.base, instruction->result_loc,
@@ -26035,7 +26153,7 @@ static IrInstGen *ir_analyze_instruction_slice(IrAnalyze *ira, IrInstSrcSlice *i
             if (array_type->data.pointer.ptr_len == PtrLenC) {
                 array_type = adjust_ptr_len(ira->codegen, array_type, PtrLenUnknown);
 
-                // C pointers are allowzero by default.  
+                // C pointers are allowzero by default.
                 // However, we want to be able to slice them without generating an allowzero slice (see issue #4401).
                 // To achieve this, we generate a runtime safety check and make the slice type non-allowzero.
                 if (array_type->data.pointer.allow_zero) {
@@ -26330,7 +26448,7 @@ static IrInstGen *ir_analyze_instruction_slice(IrAnalyze *ira, IrInstSrcSlice *i
 
         if (type_is_invalid(ptr_val->value->type))
             return ira->codegen->invalid_inst_gen;
-    
+
         ir_build_assert_non_null(ira, &instruction->base.base, ptr_val);
     }
 
@@ -28211,43 +28329,20 @@ static ZigType *ir_resolve_atomic_operand_type(IrAnalyze *ira, IrInstGen *op) {
     if (type_is_invalid(operand_type))
         return ira->codegen->builtin_types.entry_invalid;
 
-    if (operand_type->id == ZigTypeIdInt) {
-        if (operand_type->data.integral.bit_count < 8) {
-            ir_add_error(ira, &op->base,
-                buf_sprintf("expected integer type 8 bits or larger, found %" PRIu32 "-bit integer type",
-                    operand_type->data.integral.bit_count));
-            return ira->codegen->builtin_types.entry_invalid;
+    if (operand_type->id == ZigTypeIdInt || operand_type->id == ZigTypeIdEnum) {
+        ZigType *int_type;
+        if (operand_type->id == ZigTypeIdEnum) {
+            int_type = operand_type->data.enumeration.tag_int_type;
+        } else {
+            int_type = operand_type;
         }
+        auto bit_count = int_type->data.integral.bit_count;
         uint32_t max_atomic_bits = target_arch_largest_atomic_bits(ira->codegen->zig_target->arch);
-        if (operand_type->data.integral.bit_count > max_atomic_bits) {
+
+        if (bit_count > max_atomic_bits) {
             ir_add_error(ira, &op->base,
                 buf_sprintf("expected %" PRIu32 "-bit integer type or smaller, found %" PRIu32 "-bit integer type",
-                    max_atomic_bits, operand_type->data.integral.bit_count));
-            return ira->codegen->builtin_types.entry_invalid;
-        }
-        if (!is_power_of_2(operand_type->data.integral.bit_count)) {
-            ir_add_error(ira, &op->base,
-                buf_sprintf("%" PRIu32 "-bit integer type is not a power of 2", operand_type->data.integral.bit_count));
-            return ira->codegen->builtin_types.entry_invalid;
-        }
-    } else if (operand_type->id == ZigTypeIdEnum) {
-        ZigType *int_type = operand_type->data.enumeration.tag_int_type;
-        if (int_type->data.integral.bit_count < 8) {
-            ir_add_error(ira, &op->base,
-                buf_sprintf("expected enum tag type 8 bits or larger, found %" PRIu32 "-bit tag type",
-                    int_type->data.integral.bit_count));
-            return ira->codegen->builtin_types.entry_invalid;
-        }
-        uint32_t max_atomic_bits = target_arch_largest_atomic_bits(ira->codegen->zig_target->arch);
-        if (int_type->data.integral.bit_count > max_atomic_bits) {
-            ir_add_error(ira, &op->base,
-                buf_sprintf("expected %" PRIu32 "-bit enum tag type or smaller, found %" PRIu32 "-bit tag type",
-                    max_atomic_bits, int_type->data.integral.bit_count));
-            return ira->codegen->builtin_types.entry_invalid;
-        }
-        if (!is_power_of_2(int_type->data.integral.bit_count)) {
-            ir_add_error(ira, &op->base,
-                buf_sprintf("%" PRIu32 "-bit enum tag type is not a power of 2", int_type->data.integral.bit_count));
+                    max_atomic_bits, bit_count));
             return ira->codegen->builtin_types.entry_invalid;
         }
     } else if (operand_type->id == ZigTypeIdFloat) {
@@ -28258,6 +28353,8 @@ static ZigType *ir_resolve_atomic_operand_type(IrAnalyze *ira, IrInstGen *op) {
                     max_atomic_bits, (uint32_t) operand_type->data.floating.bit_count));
             return ira->codegen->builtin_types.entry_invalid;
         }
+    } else if (operand_type->id == ZigTypeIdBool) {
+        // will be treated as u8
     } else {
         Error err;
         ZigType *operand_ptr_type;
@@ -28296,11 +28393,15 @@ static IrInstGen *ir_analyze_instruction_atomic_rmw(IrAnalyze *ira, IrInstSrcAto
 
     if (operand_type->id == ZigTypeIdEnum && op != AtomicRmwOp_xchg) {
         ir_add_error(ira, &instruction->op->base,
-            buf_sprintf("@atomicRmw on enum only works with .Xchg"));
+            buf_sprintf("@atomicRmw with enum only allowed with .Xchg"));
+        return ira->codegen->invalid_inst_gen;
+    } else if (operand_type->id == ZigTypeIdBool && op != AtomicRmwOp_xchg) {
+        ir_add_error(ira, &instruction->op->base,
+            buf_sprintf("@atomicRmw with bool only allowed with .Xchg"));
         return ira->codegen->invalid_inst_gen;
     } else if (operand_type->id == ZigTypeIdFloat && op > AtomicRmwOp_sub) {
         ir_add_error(ira, &instruction->op->base,
-            buf_sprintf("@atomicRmw with float only works with .Xchg, .Add and .Sub"));
+            buf_sprintf("@atomicRmw with float only allowed with .Xchg, .Add and .Sub"));
         return ira->codegen->invalid_inst_gen;
     }
 
@@ -28321,14 +28422,103 @@ static IrInstGen *ir_analyze_instruction_atomic_rmw(IrAnalyze *ira, IrInstSrcAto
         return ira->codegen->invalid_inst_gen;
     }
 
-    if (instr_is_comptime(casted_operand) && instr_is_comptime(casted_ptr) && casted_ptr->value->data.x_ptr.mut == ConstPtrMutComptimeVar)
-    {
-        ir_add_error(ira, &instruction->base.base,
-            buf_sprintf("compiler bug: TODO compile-time execution of @atomicRmw"));
-        return ira->codegen->invalid_inst_gen;
+    // special case zero bit types
+    switch (type_has_one_possible_value(ira->codegen, operand_type)) {
+        case OnePossibleValueInvalid:
+            return ira->codegen->invalid_inst_gen;
+        case OnePossibleValueYes:
+            return ir_const_move(ira, &instruction->base.base, get_the_one_possible_value(ira->codegen, operand_type));
+        case OnePossibleValueNo:
+            break;
     }
 
-    return ir_build_atomic_rmw_gen(ira, &instruction->base.base, casted_ptr, casted_operand, op,
+    IrInst *source_inst = &instruction->base.base;
+    if (instr_is_comptime(casted_operand) && instr_is_comptime(casted_ptr) && casted_ptr->value->data.x_ptr.mut == ConstPtrMutComptimeVar) {
+        ZigValue *ptr_val = ir_resolve_const(ira, casted_ptr, UndefBad);
+        if (ptr_val == nullptr)
+            return ira->codegen->invalid_inst_gen;
+
+        ZigValue *op1_val = const_ptr_pointee(ira, ira->codegen, ptr_val, instruction->base.base.source_node);
+        if (op1_val == nullptr)
+            return ira->codegen->invalid_inst_gen;
+
+        ZigValue *op2_val = ir_resolve_const(ira, casted_operand, UndefBad);
+        if (op2_val == nullptr)
+            return ira->codegen->invalid_inst_gen;
+
+        IrInstGen *result = ir_const(ira, source_inst, operand_type);
+        copy_const_val(ira->codegen, result->value, op1_val);
+        if (op == AtomicRmwOp_xchg) {
+            copy_const_val(ira->codegen, op1_val, op2_val);
+            return result;
+        }
+
+        if (operand_type->id == ZigTypeIdPointer || operand_type->id == ZigTypeIdOptional) {
+            ir_add_error(ira, &instruction->ordering->base,
+                buf_sprintf("TODO comptime @atomicRmw with pointers other than .Xchg"));
+            return ira->codegen->invalid_inst_gen;
+        }
+
+        ErrorMsg *msg;
+        if (op == AtomicRmwOp_min || op == AtomicRmwOp_max) {
+            IrBinOp bin_op;
+            if (op == AtomicRmwOp_min)
+                // store op2 if op2 < op1
+                bin_op = IrBinOpCmpGreaterThan;
+            else
+                // store op2 if op2 > op1
+                bin_op = IrBinOpCmpLessThan;
+
+            IrInstGen *dummy_value = ir_const(ira, source_inst, operand_type);
+            msg = ir_eval_bin_op_cmp_scalar(ira, source_inst, op1_val, bin_op, op2_val, dummy_value->value);
+            if (msg != nullptr) {
+                return ira->codegen->invalid_inst_gen;
+            }
+            if (dummy_value->value->data.x_bool)
+                copy_const_val(ira->codegen, op1_val, op2_val);
+        } else {
+            IrBinOp bin_op;
+            switch (op) {
+                case AtomicRmwOp_xchg:
+                case AtomicRmwOp_max:
+                case AtomicRmwOp_min:
+                    zig_unreachable();
+                case AtomicRmwOp_add:
+                    if (operand_type->id == ZigTypeIdFloat)
+                        bin_op = IrBinOpAdd;
+                    else
+                        bin_op = IrBinOpAddWrap;
+                    break;
+                case AtomicRmwOp_sub:
+                    if (operand_type->id == ZigTypeIdFloat)
+                        bin_op = IrBinOpSub;
+                    else
+                        bin_op = IrBinOpSubWrap;
+                    break;
+                case AtomicRmwOp_and:
+                case AtomicRmwOp_nand:
+                    bin_op = IrBinOpBinAnd;
+                    break;
+                case AtomicRmwOp_or:
+                    bin_op = IrBinOpBinOr;
+                    break;
+                case AtomicRmwOp_xor:
+                    bin_op = IrBinOpBinXor;
+                    break;
+            }
+            msg = ir_eval_math_op_scalar(ira, source_inst, operand_type, op1_val, bin_op, op2_val, op1_val);
+            if (msg != nullptr) {
+                return ira->codegen->invalid_inst_gen;
+            }
+            if (op == AtomicRmwOp_nand) {
+                bigint_not(&op1_val->data.x_bigint, &op1_val->data.x_bigint,
+                        operand_type->data.integral.bit_count, operand_type->data.integral.is_signed);
+            }
+        }
+        return result;
+    }
+
+    return ir_build_atomic_rmw_gen(ira, source_inst, casted_ptr, casted_operand, op,
             ordering, operand_type);
 }
 
@@ -28400,6 +28590,16 @@ static IrInstGen *ir_analyze_instruction_atomic_store(IrAnalyze *ira, IrInstSrcA
         return ira->codegen->invalid_inst_gen;
     }
 
+    // special case zero bit types
+    switch (type_has_one_possible_value(ira->codegen, operand_type)) {
+        case OnePossibleValueInvalid:
+            return ira->codegen->invalid_inst_gen;
+        case OnePossibleValueYes:
+            return ir_const_void(ira, &instruction->base.base);
+        case OnePossibleValueNo:
+            break;
+    }
+
     if (instr_is_comptime(casted_value) && instr_is_comptime(casted_ptr)) {
         IrInstGen *result = ir_analyze_store_ptr(ira, &instruction->base.base, casted_ptr, value, false);
         result->value->type = ira->codegen->builtin_types.entry_void;
@@ -30213,7 +30413,7 @@ static Error ir_resolve_lazy_raw(AstNode *source_node, ZigValue *val) {
                     return ErrorSemanticAnalyzeFail;
                 } else if (elem_type->id == ZigTypeIdOpaque) {
                     ir_add_error(ira, &lazy_ptr_type->elem_type->base,
-                            buf_sprintf("C pointers cannot point opaque types"));
+                            buf_sprintf("C pointers cannot point to opaque types"));
                     return ErrorSemanticAnalyzeFail;
                 } else if (lazy_ptr_type->is_allowzero) {
                     ir_add_error(ira, &lazy_ptr_type->elem_type->base,
diff --git a/src/link.cpp b/src/link.cpp
index 655c0f56aa..45a9eae335 100644
--- a/src/link.cpp
+++ b/src/link.cpp
@@ -983,44 +983,59 @@ static bool is_musl_arch_name(const char *name) {
     return false;
 }
 
+enum MuslSrc {
+    MuslSrcAsm,
+    MuslSrcNormal,
+    MuslSrcO3,
+};
+
+static void add_musl_src_file(HashMap<Buf *, MuslSrc, buf_hash, buf_eql_buf> &source_table,
+        const char *file_path)
+{
+    Buf *src_file = buf_create_from_str(file_path);
+
+    MuslSrc src_kind;
+    if (buf_ends_with_str(src_file, ".c")) {
+        bool want_O3 = buf_starts_with_str(src_file, "musl/src/malloc/") ||
+            buf_starts_with_str(src_file, "musl/src/string/") ||
+            buf_starts_with_str(src_file, "musl/src/internal/");
+        src_kind = want_O3 ? MuslSrcO3 : MuslSrcNormal;
+    } else if (buf_ends_with_str(src_file, ".s") || buf_ends_with_str(src_file, ".S")) {
+        src_kind = MuslSrcAsm;
+    } else {
+        zig_unreachable();
+    }
+    if (ZIG_OS_SEP_CHAR != '/') {
+        buf_replace(src_file, '/', ZIG_OS_SEP_CHAR);
+    }
+    source_table.put_unique(src_file, src_kind);
+}
+
 static const char *build_musl(CodeGen *parent, Stage2ProgressNode *progress_node) {
     CodeGen *child_gen = create_child_codegen(parent, nullptr, OutTypeLib, nullptr, "c", progress_node);
 
     // When there is a src/<arch>/foo.* then it should substitute for src/foo.*
     // Even a .s file can substitute for a .c file.
 
-    enum MuslSrc {
-        MuslSrcAsm,
-        MuslSrcNormal,
-        MuslSrcO3,
-    };
-
     const char *target_musl_arch_name = target_arch_musl_name(parent->zig_target->arch);
 
     HashMap<Buf *, MuslSrc, buf_hash, buf_eql_buf> source_table = {};
-    source_table.init(1800);
+    source_table.init(2000);
 
     for (size_t i = 0; i < array_length(ZIG_MUSL_SRC_FILES); i += 1) {
-        Buf *src_file = buf_create_from_str(ZIG_MUSL_SRC_FILES[i]);
-
-        MuslSrc src_kind;
-        if (buf_ends_with_str(src_file, ".c")) {
-            assert(buf_starts_with_str(src_file, "musl/src/"));
-            bool want_O3 = buf_starts_with_str(src_file, "musl/src/malloc/") ||
-                buf_starts_with_str(src_file, "musl/src/string/") ||
-                buf_starts_with_str(src_file, "musl/src/internal/");
-            src_kind = want_O3 ? MuslSrcO3 : MuslSrcNormal;
-        } else if (buf_ends_with_str(src_file, ".s") || buf_ends_with_str(src_file, ".S")) {
-            src_kind = MuslSrcAsm;
-        } else {
-            continue;
-        }
-        if (ZIG_OS_SEP_CHAR != '/') {
-            buf_replace(src_file, '/', ZIG_OS_SEP_CHAR);
-        }
-        source_table.put_unique(src_file, src_kind);
+        add_musl_src_file(source_table, ZIG_MUSL_SRC_FILES[i]);
     }
 
+    static const char *time32_compat_arch_list[] = {"arm", "i386", "mips", "powerpc"};
+    for (size_t arch_i = 0; arch_i < array_length(time32_compat_arch_list); arch_i += 1) {
+        if (strcmp(target_musl_arch_name, time32_compat_arch_list[arch_i]) == 0) {
+            for (size_t i = 0; i < array_length(ZIG_MUSL_COMPAT_TIME32_FILES); i += 1) {
+                add_musl_src_file(source_table, ZIG_MUSL_COMPAT_TIME32_FILES[i]);
+            }
+        }
+    }
+
+
     ZigList<CFile *> c_source_files = {0};
 
     Buf dirname = BUF_INIT;
diff --git a/src/main.cpp b/src/main.cpp
index 469f03a911..e610135397 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1392,7 +1392,7 @@ static int main0(int argc, char **argv) {
         return main_exit(root_progress_node, EXIT_SUCCESS);
     }
     case CmdTargets:
-        return stage2_cmd_targets(buf_ptr(&zig_triple_buf));
+        return stage2_cmd_targets(target_string, mcpu, dynamic_linker);
     case CmdNone:
         return print_full_usage(arg0, stderr, EXIT_FAILURE);
     }
diff --git a/src/parser.cpp b/src/parser.cpp
index 3a3e13f1d8..cdd254962e 100644
--- a/src/parser.cpp
+++ b/src/parser.cpp
@@ -876,6 +876,7 @@ static AstNode *ast_parse_container_field(ParseContext *pc) {
 // Statement
 //     <- KEYWORD_comptime? VarDecl
 //      / KEYWORD_comptime BlockExprStatement
+//      / KEYWORD_noasync BlockExprStatement
 //      / KEYWORD_suspend (SEMICOLON / BlockExprStatement)
 //      / KEYWORD_defer BlockExprStatement
 //      / KEYWORD_errdefer BlockExprStatement
@@ -899,6 +900,14 @@ static AstNode *ast_parse_statement(ParseContext *pc) {
         return res;
     }
 
+    Token *noasync = eat_token_if(pc, TokenIdKeywordNoAsync);
+    if (noasync != nullptr) {
+        AstNode *statement = ast_expect(pc, ast_parse_block_expr_statement);
+        AstNode *res = ast_create_node(pc, NodeTypeNoAsync, noasync);
+        res->data.noasync_expr.expr = statement;
+        return res;
+    }
+
     Token *suspend = eat_token_if(pc, TokenIdKeywordSuspend);
     if (suspend != nullptr) {
         AstNode *statement = nullptr;
@@ -1237,6 +1246,7 @@ static AstNode *ast_parse_prefix_expr(ParseContext *pc) {
 //      / IfExpr
 //      / KEYWORD_break BreakLabel? Expr?
 //      / KEYWORD_comptime Expr
+//      / KEYWORD_noasync Expr
 //      / KEYWORD_continue BreakLabel?
 //      / KEYWORD_resume Expr
 //      / KEYWORD_return Expr?
@@ -1271,6 +1281,14 @@ static AstNode *ast_parse_primary_expr(ParseContext *pc) {
         return res;
     }
 
+    Token *noasync = eat_token_if(pc, TokenIdKeywordNoAsync);
+    if (noasync != nullptr) {
+        AstNode *expr = ast_expect(pc, ast_parse_expr);
+        AstNode *res = ast_create_node(pc, NodeTypeNoAsync, noasync);
+        res->data.noasync_expr.expr = expr;
+        return res;
+    }
+
     Token *continue_token = eat_token_if(pc, TokenIdKeywordContinue);
     if (continue_token != nullptr) {
         Token *label = ast_parse_break_label(pc);
@@ -1459,13 +1477,11 @@ static AstNode *ast_parse_error_union_expr(ParseContext *pc) {
 
 // SuffixExpr
 //     <- KEYWORD_async   PrimaryTypeExpr SuffixOp* FnCallArguments
-//      / KEYWORD_noasync PrimaryTypeExpr SuffixOp* FnCallArguments
 //      / PrimaryTypeExpr (SuffixOp / FnCallArguments)*
 static AstNode *ast_parse_suffix_expr(ParseContext *pc) {
-    Token *async_token = eat_token(pc);
-    bool is_async = async_token->id == TokenIdKeywordAsync;
-    if (is_async || async_token->id == TokenIdKeywordNoAsync) {
-        if (is_async && eat_token_if(pc, TokenIdKeywordFn) != nullptr) {
+    Token *async_token = eat_token_if(pc, TokenIdKeywordAsync);
+    if (async_token) {
+        if (eat_token_if(pc, TokenIdKeywordFn) != nullptr) {
             // HACK: If we see the keyword `fn`, then we assume that
             //       we are parsing an async fn proto, and not a call.
             //       We therefore put back all tokens consumed by the async
@@ -1515,13 +1531,12 @@ static AstNode *ast_parse_suffix_expr(ParseContext *pc) {
         assert(args->type == NodeTypeFnCallExpr);
 
         AstNode *res = ast_create_node(pc, NodeTypeFnCallExpr, async_token);
-        res->data.fn_call_expr.modifier = is_async ? CallModifierAsync : CallModifierNoAsync;
+        res->data.fn_call_expr.modifier = CallModifierAsync;
         res->data.fn_call_expr.seen = false;
         res->data.fn_call_expr.fn_ref_expr = child;
         res->data.fn_call_expr.params = args->data.fn_call_expr.params;
         return res;
     }
-    put_back_token(pc);
 
     AstNode *res = ast_parse_primary_type_expr(pc);
     if (res == nullptr)
@@ -1582,6 +1597,7 @@ static AstNode *ast_parse_suffix_expr(ParseContext *pc) {
 //      / IfTypeExpr
 //      / INTEGER
 //      / KEYWORD_comptime TypeExpr
+//      / KEYWORD_noasync TypeExpr
 //      / KEYWORD_error DOT IDENTIFIER
 //      / KEYWORD_false
 //      / KEYWORD_null
@@ -1683,6 +1699,14 @@ static AstNode *ast_parse_primary_type_expr(ParseContext *pc) {
         return res;
     }
 
+    Token *noasync = eat_token_if(pc, TokenIdKeywordNoAsync);
+    if (noasync != nullptr) {
+        AstNode *expr = ast_expect(pc, ast_parse_type_expr);
+        AstNode *res = ast_create_node(pc, NodeTypeNoAsync, noasync);
+        res->data.noasync_expr.expr = expr;
+        return res;
+    }
+
     Token *error = eat_token_if(pc, TokenIdKeywordError);
     if (error != nullptr) {
         Token *dot = expect_token(pc, TokenIdDot);
@@ -2599,14 +2623,10 @@ static AstNode *ast_parse_prefix_op(ParseContext *pc) {
         return res;
     }
 
-    Token *noasync_token = eat_token_if(pc, TokenIdKeywordNoAsync);
     Token *await = eat_token_if(pc, TokenIdKeywordAwait);
     if (await != nullptr) {
         AstNode *res = ast_create_node(pc, NodeTypeAwaitExpr, await);
-        res->data.await_expr.noasync_token = noasync_token;
         return res;
-    } else if (noasync_token != nullptr) {
-        put_back_token(pc);
     }
 
     return nullptr;
@@ -3125,6 +3145,9 @@ void ast_visit_node_children(AstNode *node, void (*visit)(AstNode **, void *cont
         case NodeTypeCompTime:
             visit_field(&node->data.comptime_expr.expr, visit, context);
             break;
+        case NodeTypeNoAsync:
+            visit_field(&node->data.comptime_expr.expr, visit, context);
+            break;
         case NodeTypeBreak:
             // none
             break;
diff --git a/src/stage2.cpp b/src/stage2.cpp
index 1f6cb2d6aa..a8d8b7cf97 100644
--- a/src/stage2.cpp
+++ b/src/stage2.cpp
@@ -251,13 +251,16 @@ Error stage2_target_parse(struct ZigTarget *target, const char *zig_triple, cons
         target->cache_hash = "\n\n";
     }
 
+    target->cache_hash_len = strlen(target->cache_hash);
+
     if (dynamic_linker != nullptr) {
         target->dynamic_linker = dynamic_linker;
     }
+
     return ErrorNone;
 }
 
-int stage2_cmd_targets(const char *zig_triple) {
+int stage2_cmd_targets(const char *zig_triple, const char *mcpu, const char *dynamic_linker) {
     const char *msg = "stage0 called stage2_cmd_targets";
     stage2_panic(msg, strlen(msg));
 }
@@ -269,8 +272,6 @@ enum Error stage2_libc_parse(struct Stage2LibCInstallation *libc, const char *li
     libc->sys_include_dir_len = strlen(libc->sys_include_dir);
     libc->crt_dir = "";
     libc->crt_dir_len = strlen(libc->crt_dir);
-    libc->static_crt_dir = "";
-    libc->static_crt_dir_len = strlen(libc->static_crt_dir);
     libc->msvc_lib_dir = "";
     libc->msvc_lib_dir_len = strlen(libc->msvc_lib_dir);
     libc->kernel32_lib_dir = "";
diff --git a/src/stage2.h b/src/stage2.h
index b73269f4e8..24fd664b3c 100644
--- a/src/stage2.h
+++ b/src/stage2.h
@@ -201,9 +201,6 @@ ZIG_EXTERN_C void stage2_progress_complete_one(Stage2ProgressNode *node);
 ZIG_EXTERN_C void stage2_progress_update_node(Stage2ProgressNode *node,
         size_t completed_count, size_t estimated_total_items);
 
-// ABI warning
-ZIG_EXTERN_C int stage2_cmd_targets(const char *zig_triple);
-
 // ABI warning
 struct Stage2LibCInstallation {
     const char *include_dir;
@@ -212,8 +209,6 @@ struct Stage2LibCInstallation {
     size_t sys_include_dir_len;
     const char *crt_dir;
     size_t crt_dir_len;
-    const char *static_crt_dir;
-    size_t static_crt_dir_len;
     const char *msvc_lib_dir;
     size_t msvc_lib_dir_len;
     const char *kernel32_lib_dir;
@@ -293,6 +288,7 @@ struct ZigTarget {
     const char *llvm_cpu_features;
     const char *cpu_builtin_str;
     const char *cache_hash;
+    size_t cache_hash_len;
     const char *os_builtin_str;
     const char *dynamic_linker;
 };
@@ -301,6 +297,9 @@ struct ZigTarget {
 ZIG_EXTERN_C enum Error stage2_target_parse(struct ZigTarget *target, const char *zig_triple, const char *mcpu,
         const char *dynamic_linker);
 
+// ABI warning
+ZIG_EXTERN_C int stage2_cmd_targets(const char *zig_triple, const char *mcpu, const char *dynamic_linker);
+
 
 // ABI warning
 struct Stage2NativePaths {
diff --git a/src/zig_clang.cpp b/src/zig_clang.cpp
index f8a5ca8873..aca20779ad 100644
--- a/src/zig_clang.cpp
+++ b/src/zig_clang.cpp
@@ -1662,6 +1662,16 @@ unsigned ZigClangVarDecl_getAlignedAttribute(const struct ZigClangVarDecl *self,
     return 0;
 }
 
+unsigned ZigClangFieldDecl_getAlignedAttribute(const struct ZigClangFieldDecl *self, const ZigClangASTContext* ctx) {
+    auto casted_self = reinterpret_cast<const clang::FieldDecl *>(self);
+    auto casted_ctx = const_cast<clang::ASTContext *>(reinterpret_cast<const clang::ASTContext *>(ctx));
+    if (const clang::AlignedAttr *AA = casted_self->getAttr<clang::AlignedAttr>()) {
+        return AA->getAlignment(*casted_ctx);
+    }
+    // Zero means no explicit alignment factor was specified
+    return 0;
+}
+
 unsigned ZigClangFunctionDecl_getAlignedAttribute(const struct ZigClangFunctionDecl *self, const ZigClangASTContext* ctx) {
     auto casted_self = reinterpret_cast<const clang::FunctionDecl *>(self);
     auto casted_ctx = const_cast<clang::ASTContext *>(reinterpret_cast<const clang::ASTContext *>(ctx));
@@ -1928,6 +1938,26 @@ bool ZigClangType_isRecordType(const ZigClangType *self) {
     return casted->isRecordType();
 }
 
+bool ZigClangType_isIncompleteOrZeroLengthArrayType(const ZigClangQualType *self,
+        const struct ZigClangASTContext *ctx)
+{
+    auto casted_ctx = reinterpret_cast<const clang::ASTContext *>(ctx);
+    auto casted = reinterpret_cast<const clang::QualType *>(self);
+    auto casted_type = reinterpret_cast<const clang::Type *>(self);
+    if (casted_type->isIncompleteArrayType())
+        return true;
+
+    clang::QualType elem_type = *casted;   
+    while (const clang::ConstantArrayType *ArrayT = casted_ctx->getAsConstantArrayType(elem_type)) {
+        if (ArrayT->getSize() == 0)
+            return true;
+
+        elem_type = ArrayT->getElementType();
+    }
+
+    return false;
+}
+
 bool ZigClangType_isConstantArrayType(const ZigClangType *self) {
     auto casted = reinterpret_cast<const clang::Type *>(self);
     return casted->isConstantArrayType();
diff --git a/src/zig_clang.h b/src/zig_clang.h
index 93b07b19dc..0e0582a08a 100644
--- a/src/zig_clang.h
+++ b/src/zig_clang.h
@@ -887,6 +887,7 @@ ZIG_EXTERN_C const struct ZigClangVarDecl *ZigClangVarDecl_getCanonicalDecl(cons
 ZIG_EXTERN_C const char* ZigClangVarDecl_getSectionAttribute(const struct ZigClangVarDecl *self, size_t *len);
 ZIG_EXTERN_C unsigned ZigClangVarDecl_getAlignedAttribute(const struct ZigClangVarDecl *self, const ZigClangASTContext* ctx);
 ZIG_EXTERN_C unsigned ZigClangFunctionDecl_getAlignedAttribute(const struct ZigClangFunctionDecl *self, const ZigClangASTContext* ctx);
+ZIG_EXTERN_C unsigned ZigClangFieldDecl_getAlignedAttribute(const struct ZigClangFieldDecl *self, const ZigClangASTContext* ctx);
 
 ZIG_EXTERN_C struct ZigClangQualType ZigClangParmVarDecl_getOriginalType(const struct ZigClangParmVarDecl *self);
 
@@ -969,6 +970,7 @@ ZIG_EXTERN_C bool ZigClangType_isBooleanType(const struct ZigClangType *self);
 ZIG_EXTERN_C bool ZigClangType_isVoidType(const struct ZigClangType *self);
 ZIG_EXTERN_C bool ZigClangType_isArrayType(const struct ZigClangType *self);
 ZIG_EXTERN_C bool ZigClangType_isRecordType(const struct ZigClangType *self);
+ZIG_EXTERN_C bool ZigClangType_isIncompleteOrZeroLengthArrayType(const ZigClangQualType *self, const struct ZigClangASTContext *ctx);
 ZIG_EXTERN_C bool ZigClangType_isConstantArrayType(const ZigClangType *self);
 ZIG_EXTERN_C const char *ZigClangType_getTypeClassName(const struct ZigClangType *self);
 ZIG_EXTERN_C const struct ZigClangArrayType *ZigClangType_getAsArrayTypeUnsafe(const struct ZigClangType *self);
diff --git a/test/compare_output.zig b/test/compare_output.zig
index ec89af35f8..1a0179c4c2 100644
--- a/test/compare_output.zig
+++ b/test/compare_output.zig
@@ -22,7 +22,7 @@ pub fn addCases(cases: *tests.CompareOutputContext) void {
             \\
             \\pub fn main() void {
             \\    privateFunction();
-            \\    const stdout = &getStdOut().outStream().stream;
+            \\    const stdout = getStdOut().outStream();
             \\    stdout.print("OK 2\n", .{}) catch unreachable;
             \\}
             \\
@@ -37,7 +37,7 @@ pub fn addCases(cases: *tests.CompareOutputContext) void {
             \\// purposefully conflicting function with main.zig
             \\// but it's private so it should be OK
             \\fn privateFunction() void {
-            \\    const stdout = &getStdOut().outStream().stream;
+            \\    const stdout = getStdOut().outStream();
             \\    stdout.print("OK 1\n", .{}) catch unreachable;
             \\}
             \\
@@ -63,7 +63,7 @@ pub fn addCases(cases: *tests.CompareOutputContext) void {
         tc.addSourceFile("foo.zig",
             \\usingnamespace @import("std").io;
             \\pub fn foo_function() void {
-            \\    const stdout = &getStdOut().outStream().stream;
+            \\    const stdout = getStdOut().outStream();
             \\    stdout.print("OK\n", .{}) catch unreachable;
             \\}
         );
@@ -74,7 +74,7 @@ pub fn addCases(cases: *tests.CompareOutputContext) void {
             \\
             \\pub fn bar_function() void {
             \\    if (foo_function()) {
-            \\        const stdout = &getStdOut().outStream().stream;
+            \\        const stdout = getStdOut().outStream();
             \\        stdout.print("OK\n", .{}) catch unreachable;
             \\    }
             \\}
@@ -106,7 +106,7 @@ pub fn addCases(cases: *tests.CompareOutputContext) void {
             \\pub const a_text = "OK\n";
             \\
             \\pub fn ok() void {
-            \\    const stdout = &io.getStdOut().outStream().stream;
+            \\    const stdout = io.getStdOut().outStream();
             \\    stdout.print(b_text, .{}) catch unreachable;
             \\}
         );
@@ -124,7 +124,7 @@ pub fn addCases(cases: *tests.CompareOutputContext) void {
         \\const io = @import("std").io;
         \\
         \\pub fn main() void {
-        \\    const stdout = &io.getStdOut().outStream().stream;
+        \\    const stdout = io.getStdOut().outStream();
         \\    stdout.print("Hello, world!\n{d:4} {x:3} {c}\n", .{@as(u32, 12), @as(u16, 0x12), @as(u8, 'a')}) catch unreachable;
         \\}
     , "Hello, world!\n  12  12 a\n");
@@ -267,7 +267,7 @@ pub fn addCases(cases: *tests.CompareOutputContext) void {
         \\    var x_local : i32 = print_ok(x);
         \\}
         \\fn print_ok(val: @TypeOf(x)) @TypeOf(foo) {
-        \\    const stdout = &io.getStdOut().outStream().stream;
+        \\    const stdout = io.getStdOut().outStream();
         \\    stdout.print("OK\n", .{}) catch unreachable;
         \\    return 0;
         \\}
@@ -349,7 +349,7 @@ pub fn addCases(cases: *tests.CompareOutputContext) void {
         \\pub fn main() void {
         \\    const bar = Bar {.field2 = 13,};
         \\    const foo = Foo {.field1 = bar,};
-        \\    const stdout = &io.getStdOut().outStream().stream;
+        \\    const stdout = io.getStdOut().outStream();
         \\    if (!foo.method()) {
         \\        stdout.print("BAD\n", .{}) catch unreachable;
         \\    }
@@ -363,7 +363,7 @@ pub fn addCases(cases: *tests.CompareOutputContext) void {
     cases.add("defer with only fallthrough",
         \\const io = @import("std").io;
         \\pub fn main() void {
-        \\    const stdout = &io.getStdOut().outStream().stream;
+        \\    const stdout = io.getStdOut().outStream();
         \\    stdout.print("before\n", .{}) catch unreachable;
         \\    defer stdout.print("defer1\n", .{}) catch unreachable;
         \\    defer stdout.print("defer2\n", .{}) catch unreachable;
@@ -376,7 +376,7 @@ pub fn addCases(cases: *tests.CompareOutputContext) void {
         \\const io = @import("std").io;
         \\const os = @import("std").os;
         \\pub fn main() void {
-        \\    const stdout = &io.getStdOut().outStream().stream;
+        \\    const stdout = io.getStdOut().outStream();
         \\    stdout.print("before\n", .{}) catch unreachable;
         \\    defer stdout.print("defer1\n", .{}) catch unreachable;
         \\    defer stdout.print("defer2\n", .{}) catch unreachable;
@@ -393,7 +393,7 @@ pub fn addCases(cases: *tests.CompareOutputContext) void {
         \\    do_test() catch return;
         \\}
         \\fn do_test() !void {
-        \\    const stdout = &io.getStdOut().outStream().stream;
+        \\    const stdout = io.getStdOut().outStream();
         \\    stdout.print("before\n", .{}) catch unreachable;
         \\    defer stdout.print("defer1\n", .{}) catch unreachable;
         \\    errdefer stdout.print("deferErr\n", .{}) catch unreachable;
@@ -412,7 +412,7 @@ pub fn addCases(cases: *tests.CompareOutputContext) void {
         \\    do_test() catch return;
         \\}
         \\fn do_test() !void {
-        \\    const stdout = &io.getStdOut().outStream().stream;
+        \\    const stdout = io.getStdOut().outStream();
         \\    stdout.print("before\n", .{}) catch unreachable;
         \\    defer stdout.print("defer1\n", .{}) catch unreachable;
         \\    errdefer stdout.print("deferErr\n", .{}) catch unreachable;
@@ -429,7 +429,7 @@ pub fn addCases(cases: *tests.CompareOutputContext) void {
             \\const io = @import("std").io;
             \\
             \\pub fn main() void {
-            \\    const stdout = &io.getStdOut().outStream().stream;
+            \\    const stdout = io.getStdOut().outStream();
             \\    stdout.print(foo_txt, .{}) catch unreachable;
             \\}
         , "1234\nabcd\n");
@@ -448,9 +448,7 @@ pub fn addCases(cases: *tests.CompareOutputContext) void {
             \\
             \\pub fn main() !void {
             \\    var args_it = std.process.args();
-            \\    var stdout_file = io.getStdOut();
-            \\    var stdout_adapter = stdout_file.outStream();
-            \\    const stdout = &stdout_adapter.stream;
+            \\    const stdout = io.getStdOut().outStream();
             \\    var index: usize = 0;
             \\    _ = args_it.skip();
             \\    while (args_it.next(allocator)) |arg_or_err| : (index += 1) {
@@ -489,9 +487,7 @@ pub fn addCases(cases: *tests.CompareOutputContext) void {
             \\
             \\pub fn main() !void {
             \\    var args_it = std.process.args();
-            \\    var stdout_file = io.getStdOut();
-            \\    var stdout_adapter = stdout_file.outStream();
-            \\    const stdout = &stdout_adapter.stream;
+            \\    const stdout = io.getStdOut().outStream();
             \\    var index: usize = 0;
             \\    _ = args_it.skip();
             \\    while (args_it.next(allocator)) |arg_or_err| : (index += 1) {
diff --git a/test/compile_errors.zig b/test/compile_errors.zig
index f559311547..f894a152a7 100644
--- a/test/compile_errors.zig
+++ b/test/compile_errors.zig
@@ -2,6 +2,62 @@ const tests = @import("tests.zig");
 const std = @import("std");
 
 pub fn addCases(cases: *tests.CompileErrorContext) void {
+    cases.addTest("shift on type with non-power-of-two size",
+        \\export fn entry() void {
+        \\    const S = struct {
+        \\        fn a() void {
+        \\            var x: u24 = 42;
+        \\            _ = x >> 24;
+        \\        }
+        \\        fn b() void {
+        \\            var x: u24 = 42;
+        \\            _ = x << 24;
+        \\        }
+        \\        fn c() void {
+        \\            var x: u24 = 42;
+        \\            _ = @shlExact(x, 24);
+        \\        }
+        \\        fn d() void {
+        \\            var x: u24 = 42;
+        \\            _ = @shrExact(x, 24);
+        \\        }
+        \\    };
+        \\    S.a();
+        \\    S.b();
+        \\    S.c();
+        \\    S.d();
+        \\}
+    , &[_][]const u8{
+        "tmp.zig:5:19: error: RHS of shift is too large for LHS type",
+        "tmp.zig:9:19: error: RHS of shift is too large for LHS type",
+        "tmp.zig:13:17: error: RHS of shift is too large for LHS type",
+        "tmp.zig:17:17: error: RHS of shift is too large for LHS type",
+    });
+
+    cases.addTest("combination of noasync and async",
+        \\export fn entry() void {
+        \\    noasync {
+        \\        const bar = async foo();
+        \\        suspend;
+        \\        resume bar;
+        \\    }
+        \\}
+        \\fn foo() void {}
+    , &[_][]const u8{
+        "tmp.zig:3:21: error: async call in noasync scope",
+        "tmp.zig:4:9: error: suspend in noasync scope",
+        "tmp.zig:5:9: error: resume in noasync scope",
+    });
+
+    cases.add("atomicrmw with bool op not .Xchg",
+        \\export fn entry() void {
+        \\    var x = false;
+        \\    _ = @atomicRmw(bool, &x, .Add, true, .SeqCst);
+        \\}
+    , &[_][]const u8{
+        "tmp.zig:3:30: error: @atomicRmw with bool only allowed with .Xchg",
+    });
+
     cases.addTest("@TypeOf with no arguments",
         \\export fn entry() void {
         \\    _ = @TypeOf();
@@ -310,7 +366,7 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
         \\    _ = @atomicRmw(f32, &x, .And, 2, .SeqCst);
         \\}
     , &[_][]const u8{
-        "tmp.zig:3:29: error: @atomicRmw with float only works with .Xchg, .Add and .Sub",
+        "tmp.zig:3:29: error: @atomicRmw with float only allowed with .Xchg, .Add and .Sub",
     });
 
     cases.add("intToPtr with misaligned address",
@@ -527,7 +583,7 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
         \\    _ = @atomicRmw(E, &x, .Add, .b, .SeqCst);
         \\}
     , &[_][]const u8{
-        "tmp.zig:9:27: error: @atomicRmw on enum only works with .Xchg",
+        "tmp.zig:9:27: error: @atomicRmw with enum only allowed with .Xchg",
     });
 
     cases.add("disallow coercion from non-null-terminated pointer to null-terminated pointer",
@@ -1592,7 +1648,7 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
         \\    var y: [*c]c_void = x;
         \\}
     , &[_][]const u8{
-        "tmp.zig:3:16: error: C pointers cannot point opaque types",
+        "tmp.zig:3:16: error: C pointers cannot point to opaque types",
     });
 
     cases.add("directly embedding opaque type in struct and union",
@@ -1610,9 +1666,14 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
         \\export fn b() void {
         \\    var bar: Bar = undefined;
         \\}
+        \\export fn c() void {
+        \\    var baz: *@OpaqueType() = undefined;
+        \\    const qux = .{baz.*};
+        \\}
     , &[_][]const u8{
-        "tmp.zig:3:8: error: opaque types have unknown size and therefore cannot be directly embedded in structs",
-        "tmp.zig:7:10: error: opaque types have unknown size and therefore cannot be directly embedded in unions",
+        "tmp.zig:3:5: error: opaque types have unknown size and therefore cannot be directly embedded in structs",
+        "tmp.zig:7:5: error: opaque types have unknown size and therefore cannot be directly embedded in unions",
+        "tmp.zig:17:22: error: opaque types have unknown size and therefore cannot be directly embedded in structs",
     });
 
     cases.add("implicit cast between C pointer and Zig pointer - bad const/align/child",
@@ -3605,11 +3666,11 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
     cases.add("array access of non array",
         \\export fn f() void {
         \\    var bad : bool = undefined;
-        \\    bad[bad] = bad[bad];
+        \\    bad[0] = bad[0];
         \\}
         \\export fn g() void {
         \\    var bad : bool = undefined;
-        \\    _ = bad[bad];
+        \\    _ = bad[0];
         \\}
     , &[_][]const u8{
         "tmp.zig:3:8: error: array access of non-array type 'bool'",
@@ -4009,8 +4070,7 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
         \\}
         \\export fn entry() u16 { return f(); }
     , &[_][]const u8{
-        "tmp.zig:3:14: error: RHS of shift is too large for LHS type",
-        "tmp.zig:3:17: note: value 8 cannot fit into type u3",
+        "tmp.zig:3:17: error: integer value 8 cannot be coerced to type 'u3'",
     });
 
     cases.add("missing function call param",
@@ -6538,9 +6598,41 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
         \\export fn bar() !FooType {
         \\    return error.InvalidValue;
         \\}
+        \\export fn bav() !@TypeOf(null) {
+        \\    return error.InvalidValue;
+        \\}
+        \\export fn baz() !@TypeOf(undefined) {
+        \\    return error.InvalidValue;
+        \\}
     , &[_][]const u8{
-        "tmp.zig:2:18: error: opaque return type 'FooType' not allowed",
-        "tmp.zig:1:1: note: declared here",
+        "tmp.zig:2:18: error: Opaque return type 'FooType' not allowed",
+        "tmp.zig:1:1: note: type declared here",
+        "tmp.zig:5:18: error: Null return type '(null)' not allowed",
+        "tmp.zig:8:18: error: Undefined return type '(undefined)' not allowed",
+    });
+
+    cases.add("generic function returning opaque type",
+        \\const FooType = @OpaqueType();
+        \\fn generic(comptime T: type) !T {
+        \\    return undefined;
+        \\}
+        \\export fn bar() void {
+        \\    _ = generic(FooType);
+        \\}
+        \\export fn bav() void {
+        \\    _ = generic(@TypeOf(null));
+        \\}
+        \\export fn baz() void {
+        \\    _ = generic(@TypeOf(undefined));
+        \\}
+    , &[_][]const u8{
+        "tmp.zig:6:16: error: call to generic function with Opaque return type 'FooType' not allowed",
+        "tmp.zig:2:1: note: function declared here",
+        "tmp.zig:1:1: note: type declared here",
+        "tmp.zig:9:16: error: call to generic function with Null return type '(null)' not allowed",
+        "tmp.zig:2:1: note: function declared here",
+        "tmp.zig:12:16: error: call to generic function with Undefined return type '(undefined)' not allowed",
+        "tmp.zig:2:1: note: function declared here",
     });
 
     cases.add( // fixed bug #2032
diff --git a/test/run_translated_c.zig b/test/run_translated_c.zig
index 313a83705c..629a850836 100644
--- a/test/run_translated_c.zig
+++ b/test/run_translated_c.zig
@@ -195,22 +195,4 @@ pub fn addCases(cases: *tests.RunTranslatedCContext) void {
         \\  return 0;
         \\}
     , "");
-
-    cases.add("cast from pointer to opaque type to struct",
-        \\#include <stdio.h>
-        \\typedef struct
-        \\{
-        \\    int i;
-        \\}
-        \\StructType,*StructPtrType;
-        \\
-        \\typedef struct OpaqueStruct OpaqueStructTypedef;
-        \\#define Macro(opaquePtr) 	(((StructPtrType)(opaquePtr))->i)
-        \\int main(int argc, char **argv) {
-        \\  StructType localStruct = {88};
-        \\  OpaqueStructTypedef *opaquePtrToLocal = &localStruct;
-        \\  printf("%d!\n", Macro(opaquePtrToLocal));
-        \\  return 0;
-        \\}
-    , "88!\n");
 }
diff --git a/test/runtime_safety.zig b/test/runtime_safety.zig
index e183c6979f..5047bfd0d0 100644
--- a/test/runtime_safety.zig
+++ b/test/runtime_safety.zig
@@ -1,6 +1,36 @@
 const tests = @import("tests.zig");
 
 pub fn addCases(cases: *tests.CompareOutputContext) void {
+    cases.addRuntimeSafety("shift left by huge amount",
+        \\const std = @import("std");
+        \\pub fn panic(message: []const u8, stack_trace: ?*@import("builtin").StackTrace) noreturn {
+        \\    if (std.mem.eql(u8, message, "shift amount is greater than the type size")) {
+        \\        std.process.exit(126); // good
+        \\    }
+        \\    std.process.exit(0); // test failed
+        \\}
+        \\pub fn main() void {
+        \\    var x: u24 = 42;
+        \\    var y: u5 = 24;
+        \\    var z = x >> y;
+        \\}
+    );
+
+    cases.addRuntimeSafety("shift right by huge amount",
+        \\const std = @import("std");
+        \\pub fn panic(message: []const u8, stack_trace: ?*@import("builtin").StackTrace) noreturn {
+        \\    if (std.mem.eql(u8, message, "shift amount is greater than the type size")) {
+        \\        std.process.exit(126); // good
+        \\    }
+        \\    std.process.exit(0); // test failed
+        \\}
+        \\pub fn main() void {
+        \\    var x: u24 = 42;
+        \\    var y: u5 = 24;
+        \\    var z = x << y;
+        \\}
+    );
+
     cases.addRuntimeSafety("slice sentinel mismatch - optional pointers",
         \\const std = @import("std");
         \\pub fn panic(message: []const u8, stack_trace: ?*@import("builtin").StackTrace) noreturn {
diff --git a/test/stage1/behavior/alignof.zig b/test/stage1/behavior/alignof.zig
index f923fd9355..96114ed560 100644
--- a/test/stage1/behavior/alignof.zig
+++ b/test/stage1/behavior/alignof.zig
@@ -15,3 +15,24 @@ test "@alignOf(T) before referencing T" {
         comptime expect(@alignOf(Foo) == 4);
     }
 }
+
+test "comparison of @alignOf(T) against zero" {
+    {
+        const T = struct { x: u32 };
+        expect(!(@alignOf(T) == 0));
+        expect(@alignOf(T) != 0);
+        expect(!(@alignOf(T) < 0));
+        expect(!(@alignOf(T) <= 0));
+        expect(@alignOf(T) > 0);
+        expect(@alignOf(T) >= 0);
+    }
+    {
+        const T = struct {};
+        expect(@alignOf(T) == 0);
+        expect(!(@alignOf(T) != 0));
+        expect(!(@alignOf(T) < 0));
+        expect(@alignOf(T) <= 0);
+        expect(!(@alignOf(T) > 0));
+        expect(@alignOf(T) >= 0);
+    }
+}
diff --git a/test/stage1/behavior/array.zig b/test/stage1/behavior/array.zig
index 7ac1e8197d..da56864cc9 100644
--- a/test/stage1/behavior/array.zig
+++ b/test/stage1/behavior/array.zig
@@ -1,6 +1,8 @@
 const std = @import("std");
-const expect = std.testing.expect;
+const testing = std.testing;
 const mem = std.mem;
+const expect = testing.expect;
+const expectEqual = testing.expectEqual;
 
 test "arrays" {
     var array: [5]u32 = undefined;
@@ -360,3 +362,17 @@ test "access the null element of a null terminated array" {
     S.doTheTest();
     comptime S.doTheTest();
 }
+
+test "type deduction for array subscript expression" {
+    const S = struct {
+        fn doTheTest() void {
+            var array = [_]u8{ 0x55, 0xAA };
+            var v0 = true;
+            expectEqual(@as(u8, 0xAA), array[if (v0) 1 else 0]);
+            var v1 = false;
+            expectEqual(@as(u8, 0x55), array[if (v1) 1 else 0]);
+        }
+    };
+    S.doTheTest();
+    comptime S.doTheTest();
+}
diff --git a/test/stage1/behavior/async_fn.zig b/test/stage1/behavior/async_fn.zig
index 6583adec66..6b99187563 100644
--- a/test/stage1/behavior/async_fn.zig
+++ b/test/stage1/behavior/async_fn.zig
@@ -1531,3 +1531,19 @@ test "noasync await" {
     S.doTheTest();
     expect(S.finished);
 }
+
+test "noasync on function calls" {
+    const S0 = struct {
+        b: i32 = 42,
+    };
+    const S1 = struct {
+        fn c() S0 {
+            return S0{};
+        }
+        fn d() !S0 {
+            return S0{};
+        }
+    };
+    expectEqual(@as(i32, 42), noasync S1.c().b);
+    expectEqual(@as(i32, 42), (try noasync S1.d()).b);
+}
diff --git a/test/stage1/behavior/atomics.zig b/test/stage1/behavior/atomics.zig
index ae98caae0a..680b1a2797 100644
--- a/test/stage1/behavior/atomics.zig
+++ b/test/stage1/behavior/atomics.zig
@@ -2,29 +2,32 @@ const std = @import("std");
 const expect = std.testing.expect;
 const expectEqual = std.testing.expectEqual;
 const builtin = @import("builtin");
-const AtomicRmwOp = builtin.AtomicRmwOp;
-const AtomicOrder = builtin.AtomicOrder;
 
 test "cmpxchg" {
+    testCmpxchg();
+    comptime testCmpxchg();
+}
+
+fn testCmpxchg() void {
     var x: i32 = 1234;
-    if (@cmpxchgWeak(i32, &x, 99, 5678, AtomicOrder.SeqCst, AtomicOrder.SeqCst)) |x1| {
+    if (@cmpxchgWeak(i32, &x, 99, 5678, .SeqCst, .SeqCst)) |x1| {
         expect(x1 == 1234);
     } else {
         @panic("cmpxchg should have failed");
     }
 
-    while (@cmpxchgWeak(i32, &x, 1234, 5678, AtomicOrder.SeqCst, AtomicOrder.SeqCst)) |x1| {
+    while (@cmpxchgWeak(i32, &x, 1234, 5678, .SeqCst, .SeqCst)) |x1| {
         expect(x1 == 1234);
     }
     expect(x == 5678);
 
-    expect(@cmpxchgStrong(i32, &x, 5678, 42, AtomicOrder.SeqCst, AtomicOrder.SeqCst) == null);
+    expect(@cmpxchgStrong(i32, &x, 5678, 42, .SeqCst, .SeqCst) == null);
     expect(x == 42);
 }
 
 test "fence" {
     var x: i32 = 1234;
-    @fence(AtomicOrder.SeqCst);
+    @fence(.SeqCst);
     x = 5678;
 }
 
@@ -36,18 +39,18 @@ test "atomicrmw and atomicload" {
 }
 
 fn testAtomicRmw(ptr: *u8) void {
-    const prev_value = @atomicRmw(u8, ptr, AtomicRmwOp.Xchg, 42, AtomicOrder.SeqCst);
+    const prev_value = @atomicRmw(u8, ptr, .Xchg, 42, .SeqCst);
     expect(prev_value == 200);
     comptime {
         var x: i32 = 1234;
         const y: i32 = 12345;
-        expect(@atomicLoad(i32, &x, AtomicOrder.SeqCst) == 1234);
-        expect(@atomicLoad(i32, &y, AtomicOrder.SeqCst) == 12345);
+        expect(@atomicLoad(i32, &x, .SeqCst) == 1234);
+        expect(@atomicLoad(i32, &y, .SeqCst) == 12345);
     }
 }
 
 fn testAtomicLoad(ptr: *u8) void {
-    const x = @atomicLoad(u8, ptr, AtomicOrder.SeqCst);
+    const x = @atomicLoad(u8, ptr, .SeqCst);
     expect(x == 42);
 }
 
@@ -56,18 +59,18 @@ test "cmpxchg with ptr" {
     var data2: i32 = 5678;
     var data3: i32 = 9101;
     var x: *i32 = &data1;
-    if (@cmpxchgWeak(*i32, &x, &data2, &data3, AtomicOrder.SeqCst, AtomicOrder.SeqCst)) |x1| {
+    if (@cmpxchgWeak(*i32, &x, &data2, &data3, .SeqCst, .SeqCst)) |x1| {
         expect(x1 == &data1);
     } else {
         @panic("cmpxchg should have failed");
     }
 
-    while (@cmpxchgWeak(*i32, &x, &data1, &data3, AtomicOrder.SeqCst, AtomicOrder.SeqCst)) |x1| {
+    while (@cmpxchgWeak(*i32, &x, &data1, &data3, .SeqCst, .SeqCst)) |x1| {
         expect(x1 == &data1);
     }
     expect(x == &data3);
 
-    expect(@cmpxchgStrong(*i32, &x, &data3, &data2, AtomicOrder.SeqCst, AtomicOrder.SeqCst) == null);
+    expect(@cmpxchgStrong(*i32, &x, &data3, &data2, .SeqCst, .SeqCst) == null);
     expect(x == &data2);
 }
 
@@ -151,6 +154,7 @@ test "atomicrmw with floats" {
         return error.SkipZigTest;
     }
     testAtomicRmwFloat();
+    comptime testAtomicRmwFloat();
 }
 
 fn testAtomicRmwFloat() void {
@@ -163,3 +167,54 @@ fn testAtomicRmwFloat() void {
     _ = @atomicRmw(f32, &x, .Sub, 2, .SeqCst);
     expect(x == 4);
 }
+
+test "atomicrmw with ints" {
+    testAtomicRmwInt();
+    comptime testAtomicRmwInt();
+}
+
+fn testAtomicRmwInt() void {
+    var x: u8 = 1;
+    var res = @atomicRmw(u8, &x, .Xchg, 3, .SeqCst);
+    expect(x == 3 and res == 1);
+    _ = @atomicRmw(u8, &x, .Add, 3, .SeqCst);
+    expect(x == 6);
+    _ = @atomicRmw(u8, &x, .Sub, 1, .SeqCst);
+    expect(x == 5);
+    _ = @atomicRmw(u8, &x, .And, 4, .SeqCst);
+    expect(x == 4);
+    _ = @atomicRmw(u8, &x, .Nand, 4, .SeqCst);
+    expect(x == 0xfb);
+    _ = @atomicRmw(u8, &x, .Or, 6, .SeqCst);
+    expect(x == 0xff);
+    _ = @atomicRmw(u8, &x, .Xor, 2, .SeqCst);
+    expect(x == 0xfd);
+
+    // TODO https://github.com/ziglang/zig/issues/4724
+    if (builtin.arch == .mipsel) return;
+    _ = @atomicRmw(u8, &x, .Max, 1, .SeqCst);
+    expect(x == 0xfd);
+    _ = @atomicRmw(u8, &x, .Min, 1, .SeqCst);
+    expect(x == 1);
+}
+
+test "atomics with different types" {
+    testAtomicsWithType(bool, true, false);
+    inline for (.{ u1, i5, u15 }) |T| {
+        var x: T = 0;
+        testAtomicsWithType(T, 0, 1);
+    }
+    testAtomicsWithType(u0, 0, 0);
+    testAtomicsWithType(i0, 0, 0);
+}
+
+fn testAtomicsWithType(comptime T: type, a: T, b: T) void {
+    var x: T = b;
+    @atomicStore(T, &x, a, .SeqCst);
+    expect(x == a);
+    expect(@atomicLoad(T, &x, .SeqCst) == a);
+    expect(@atomicRmw(T, &x, .Xchg, b, .SeqCst) == a);
+    expect(@cmpxchgStrong(T, &x, b, a, .SeqCst, .SeqCst) == null);
+    if (@sizeOf(T) != 0)
+        expect(@cmpxchgStrong(T, &x, b, a, .SeqCst, .SeqCst).? == a);
+}
diff --git a/test/stage1/behavior/math.zig b/test/stage1/behavior/math.zig
index 3978c69830..b50e72840a 100644
--- a/test/stage1/behavior/math.zig
+++ b/test/stage1/behavior/math.zig
@@ -449,6 +449,25 @@ fn testShrExact(x: u8) void {
     expect(shifted == 0b00101101);
 }
 
+test "shift left/right on u0 operand" {
+    const S = struct {
+        fn doTheTest() void {
+            var x: u0 = 0;
+            var y: u0 = 0;
+            expectEqual(@as(u0, 0), x << 0);
+            expectEqual(@as(u0, 0), x >> 0);
+            expectEqual(@as(u0, 0), x << y);
+            expectEqual(@as(u0, 0), x >> y);
+            expectEqual(@as(u0, 0), @shlExact(x, 0));
+            expectEqual(@as(u0, 0), @shrExact(x, 0));
+            expectEqual(@as(u0, 0), @shlExact(x, y));
+            expectEqual(@as(u0, 0), @shrExact(x, y));
+        }
+    };
+    S.doTheTest();
+    comptime S.doTheTest();
+}
+
 test "comptime_int addition" {
     comptime {
         expect(35361831660712422535336160538497375248 + 101752735581729509668353361206450473702 == 137114567242441932203689521744947848950);
diff --git a/test/stage1/behavior/optional.zig b/test/stage1/behavior/optional.zig
index fa002b707e..7dd48769db 100644
--- a/test/stage1/behavior/optional.zig
+++ b/test/stage1/behavior/optional.zig
@@ -175,3 +175,26 @@ test "0-bit child type coerced to optional return ptr result location" {
     S.doTheTest();
     comptime S.doTheTest();
 }
+
+test "0-bit child type coerced to optional" {
+    const S = struct {
+        fn doTheTest() void {
+            var it: Foo = .{
+                .list = undefined,
+            };
+            expect(it.foo() != null);
+        }
+
+        const Empty = struct {};
+        const Foo = struct {
+            list: [10]Empty,
+
+            fn foo(self: *Foo) ?*Empty {
+                const data = &self.list[0];
+                return data;
+            }
+        };
+    };
+    S.doTheTest();
+    comptime S.doTheTest();
+}
diff --git a/test/standalone/guess_number/main.zig b/test/standalone/guess_number/main.zig
index f5b3b36993..14babcd145 100644
--- a/test/standalone/guess_number/main.zig
+++ b/test/standalone/guess_number/main.zig
@@ -4,7 +4,7 @@ const io = std.io;
 const fmt = std.fmt;
 
 pub fn main() !void {
-    const stdout = &io.getStdOut().outStream().stream;
+    const stdout = io.getStdOut().outStream();
     const stdin = io.getStdIn();
 
     try stdout.print("Welcome to the Guess Number Game in Zig.\n", .{});
diff --git a/test/tests.zig b/test/tests.zig
index a22d3fccea..6b5707028d 100644
--- a/test/tests.zig
+++ b/test/tests.zig
@@ -594,12 +594,9 @@ pub const StackTracesContext = struct {
             }
             child.spawn() catch |err| debug.panic("Unable to spawn {}: {}\n", .{ full_exe_path, @errorName(err) });
 
-            var stdout_file_in_stream = child.stdout.?.inStream();
-            var stderr_file_in_stream = child.stderr.?.inStream();
-
-            const stdout = stdout_file_in_stream.stream.readAllAlloc(b.allocator, max_stdout_size) catch unreachable;
+            const stdout = child.stdout.?.inStream().readAllAlloc(b.allocator, max_stdout_size) catch unreachable;
             defer b.allocator.free(stdout);
-            const stderr = stderr_file_in_stream.stream.readAllAlloc(b.allocator, max_stdout_size) catch unreachable;
+            const stderr = child.stderr.?.inStream().readAllAlloc(b.allocator, max_stdout_size) catch unreachable;
             defer b.allocator.free(stderr);
 
             const term = child.wait() catch |err| {
@@ -826,11 +823,8 @@ pub const CompileErrorContext = struct {
             var stdout_buf = Buffer.initNull(b.allocator);
             var stderr_buf = Buffer.initNull(b.allocator);
 
-            var stdout_file_in_stream = child.stdout.?.inStream();
-            var stderr_file_in_stream = child.stderr.?.inStream();
-
-            stdout_file_in_stream.stream.readAllBuffer(&stdout_buf, max_stdout_size) catch unreachable;
-            stderr_file_in_stream.stream.readAllBuffer(&stderr_buf, max_stdout_size) catch unreachable;
+            child.stdout.?.inStream().readAllBuffer(&stdout_buf, max_stdout_size) catch unreachable;
+            child.stderr.?.inStream().readAllBuffer(&stderr_buf, max_stdout_size) catch unreachable;
 
             const term = child.wait() catch |err| {
                 debug.panic("Unable to spawn {}: {}\n", .{ zig_args.items[0], @errorName(err) });
diff --git a/test/translate_c.zig b/test/translate_c.zig
index d4ee871793..9890c4034e 100644
--- a/test/translate_c.zig
+++ b/test/translate_c.zig
@@ -3,6 +3,44 @@ const std = @import("std");
 const CrossTarget = std.zig.CrossTarget;
 
 pub fn addCases(cases: *tests.TranslateCContext) void {
+    cases.add("correct semicolon after infixop",
+        \\#define __ferror_unlocked_body(_fp) (((_fp)->_flags & _IO_ERR_SEEN) != 0)
+    , &[_][]const u8{
+        \\pub inline fn __ferror_unlocked_body(_fp: var) @TypeOf(((_fp.*._flags) & _IO_ERR_SEEN) != 0) {
+        \\    return ((_fp.*._flags) & _IO_ERR_SEEN) != 0;
+        \\}
+    });
+
+    cases.add("c booleans are just ints",
+        \\#define FOO(x) ((x >= 0) + (x >= 0))
+        \\#define BAR 1 && 2 > 4
+    , &[_][]const u8{
+        \\pub inline fn FOO(x: var) @TypeOf(@boolToInt(x >= 0) + @boolToInt(x >= 0)) {
+        \\    return @boolToInt(x >= 0) + @boolToInt(x >= 0);
+        \\}
+    ,
+        \\pub const BAR = (1 != 0) and (2 > 4);
+    });
+
+    cases.add("struct with aligned fields",
+        \\struct foo {
+        \\    __attribute__((aligned(1))) short bar;
+        \\};
+    , &[_][]const u8{
+        \\pub const struct_foo = extern struct {
+        \\    bar: c_short align(1),
+        \\};
+    });
+
+    cases.add("structs with VLAs are rejected",
+        \\struct foo { int x; int y[]; };
+        \\struct bar { int x; int y[0]; };
+    , &[_][]const u8{
+        \\pub const struct_foo = @OpaqueType();
+    ,
+        \\pub const struct_bar = @OpaqueType();
+    });
+
     cases.add("nested loops without blocks",
         \\void foo() {
         \\    while (0) while (0) {}
@@ -1420,7 +1458,7 @@ pub fn addCases(cases: *tests.TranslateCContext) void {
     cases.add("macro pointer cast",
         \\#define NRF_GPIO ((NRF_GPIO_Type *) NRF_GPIO_BASE)
     , &[_][]const u8{
-        \\pub const NRF_GPIO = (if (@typeInfo(@TypeOf(NRF_GPIO_BASE)) == .Pointer) @ptrCast([*c]NRF_GPIO_Type, @alignCast(@alignOf([*c]NRF_GPIO_Type.Child), NRF_GPIO_BASE)) else if (@typeInfo(@TypeOf(NRF_GPIO_BASE)) == .Int) @intToPtr([*c]NRF_GPIO_Type, NRF_GPIO_BASE) else @as([*c]NRF_GPIO_Type, NRF_GPIO_BASE));
+        \\pub const NRF_GPIO = (if (@typeInfo(@TypeOf(NRF_GPIO_BASE)) == .Pointer) @ptrCast([*c]NRF_GPIO_Type, NRF_GPIO_BASE) else if (@typeInfo(@TypeOf(NRF_GPIO_BASE)) == .Int and @typeInfo([*c]NRF_GPIO_Type) == .Pointer) @intToPtr([*c]NRF_GPIO_Type, NRF_GPIO_BASE) else @as([*c]NRF_GPIO_Type, NRF_GPIO_BASE));
     });
 
     cases.add("basic macro function",
@@ -1592,7 +1630,7 @@ pub fn addCases(cases: *tests.TranslateCContext) void {
     cases.add("shadowing primitive types",
         \\unsigned anyerror = 2;
     , &[_][]const u8{
-        \\pub export var _anyerror: c_uint = @bitCast(c_uint, @as(c_int, 2));
+        \\pub export var anyerror_1: c_uint = @bitCast(c_uint, @as(c_int, 2));
     });
 
     cases.add("floats",
@@ -2604,11 +2642,11 @@ pub fn addCases(cases: *tests.TranslateCContext) void {
         \\#define FOO(bar) baz((void *)(baz))
         \\#define BAR (void*) a
     , &[_][]const u8{
-        \\pub inline fn FOO(bar: var) @TypeOf(baz((if (@typeInfo(@TypeOf(baz)) == .Pointer) @ptrCast(*c_void, @alignCast(@alignOf(*c_void.Child), baz)) else if (@typeInfo(@TypeOf(baz)) == .Int) @intToPtr(*c_void, baz) else @as(*c_void, baz)))) {
-        \\    return baz((if (@typeInfo(@TypeOf(baz)) == .Pointer) @ptrCast(*c_void, @alignCast(@alignOf(*c_void.Child), baz)) else if (@typeInfo(@TypeOf(baz)) == .Int) @intToPtr(*c_void, baz) else @as(*c_void, baz)));
+        \\pub inline fn FOO(bar: var) @TypeOf(baz((if (@typeInfo(@TypeOf(baz)) == .Pointer) @ptrCast(*c_void, baz) else if (@typeInfo(@TypeOf(baz)) == .Int and @typeInfo(*c_void) == .Pointer) @intToPtr(*c_void, baz) else @as(*c_void, baz)))) {
+        \\    return baz((if (@typeInfo(@TypeOf(baz)) == .Pointer) @ptrCast(*c_void, baz) else if (@typeInfo(@TypeOf(baz)) == .Int and @typeInfo(*c_void) == .Pointer) @intToPtr(*c_void, baz) else @as(*c_void, baz)));
         \\}
     ,
-        \\pub const BAR = (if (@typeInfo(@TypeOf(a)) == .Pointer) @ptrCast(*c_void, @alignCast(@alignOf(*c_void.Child), a)) else if (@typeInfo(@TypeOf(a)) == .Int) @intToPtr(*c_void, a) else @as(*c_void, a));
+        \\pub const BAR = (if (@typeInfo(@TypeOf(a)) == .Pointer) @ptrCast(*c_void, a) else if (@typeInfo(@TypeOf(a)) == .Int and @typeInfo(*c_void) == .Pointer) @intToPtr(*c_void, a) else @as(*c_void, a));
     });
 
     cases.add("macro conditional operator",
@@ -2770,19 +2808,4 @@ pub fn addCases(cases: *tests.TranslateCContext) void {
         \\    return if (x > y) x else y;
         \\}
     });
-
-    cases.add("Make sure casts are grouped",
-        \\typedef struct
-        \\{
-        \\    int i;
-        \\}
-        \\*_XPrivDisplay;
-        \\typedef struct _XDisplay Display;
-        \\#define DefaultScreen(dpy) (((_XPrivDisplay)(dpy))->default_screen)
-        \\
-    , &[_][]const u8{
-        \\pub inline fn DefaultScreen(dpy: var) @TypeOf((if (@typeInfo(@TypeOf(dpy)) == .Pointer) @ptrCast(_XPrivDisplay, @alignCast(@alignOf(_XPrivDisplay.Child), dpy)) else if (@typeInfo(@TypeOf(dpy)) == .Int) @intToPtr(_XPrivDisplay, dpy) else @as(_XPrivDisplay, dpy)).*.default_screen) {
-        \\    return (if (@typeInfo(@TypeOf(dpy)) == .Pointer) @ptrCast(_XPrivDisplay, @alignCast(@alignOf(_XPrivDisplay.Child), dpy)) else if (@typeInfo(@TypeOf(dpy)) == .Int) @intToPtr(_XPrivDisplay, dpy) else @as(_XPrivDisplay, dpy)).*.default_screen;
-        \\}
-    });
 }