Initial support for static PIE executables

lib/std/dynamic_library.zig

@@ -24,7 +24,7 @@ pub const DynLib = switch (builtin.os) {
 // fashion.
 const LinkMap = extern struct {
     l_addr: usize,
-    l_name: [*]const u8,
+    l_name: [*:0]const u8,
     l_ld: ?*elf.Dyn,
     l_next: ?*LinkMap,
     l_prev: ?*LinkMap,
@@ -53,48 +53,48 @@ const RDebug = extern struct {
     r_ldbase: usize,
 };
 
-fn elf_get_va_offset(phdrs: []elf.Phdr) !usize {
+// XXX: This should be weak (#1917)
-    for (phdrs) |*phdr| {
+extern var _DYNAMIC: [128]elf.Dyn;
-        if (phdr.p_type == elf.PT_LOAD) {
+
-            return @ptrToInt(phdr) - phdr.p_vaddr;
+comptime {
+    if (builtin.os == .linux) {
+        asm (
+            \\ .weak _DYNAMIC
+            \\ .hidden _DYNAMIC
+        );
     }
 }
-    return error.InvalidExe;
-}
 
 pub fn linkmap_iterator(phdrs: []elf.Phdr) !LinkMap.Iterator {
-    const va_offset = try elf_get_va_offset(phdrs);
+    if (@ptrToInt(&_DYNAMIC[0]) == 0) {
-
-    const dyn_table = init: {
-        for (phdrs) |*phdr| {
-            if (phdr.p_type == elf.PT_DYNAMIC) {
-                const ptr = @intToPtr([*]elf.Dyn, va_offset + phdr.p_vaddr);
-                break :init ptr[0 .. phdr.p_memsz / @sizeOf(elf.Dyn)];
-            }
-        }
         // No PT_DYNAMIC means this is either a statically-linked program or a
         // badly corrupted one
         return LinkMap.Iterator{ .current = null };
-    };
+    }
 
     const link_map_ptr = init: {
-        for (dyn_table) |*dyn| {
+        var i: usize = 0;
-            switch (dyn.d_tag) {
+        while (_DYNAMIC[i].d_tag != elf.DT_NULL) : (i += 1) {
+            switch (_DYNAMIC[i].d_tag) {
                 elf.DT_DEBUG => {
-                    const r_debug = @intToPtr(*RDebug, dyn.d_un.d_ptr);
+                    const ptr = @intToPtr(?*RDebug, _DYNAMIC[i].d_un.d_ptr);
+                    if (ptr) |r_debug| {
                         if (r_debug.r_version != 1) return error.InvalidExe;
                         break :init r_debug.r_map;
+                    }
                 },
                 elf.DT_PLTGOT => {
-                    const got_table = @intToPtr([*]usize, dyn.d_un.d_ptr);
+                    const ptr = @intToPtr(?[*]usize, _DYNAMIC[i].d_un.d_ptr);
-                    // The address to the link_map structure is stored in the
+                    if (ptr) |got_table| {
-                    // second slot
+                        // The address to the link_map structure is stored in
+                        // the second slot
                         break :init @intToPtr(?*LinkMap, got_table[1]);
+                    }
                 },
                 else => {},
             }
         }
-        return error.InvalidExe;
+        return LinkMap.Iterator{ .current = null };
     };
 
     return LinkMap.Iterator{ .current = link_map_ptr };

lib/std/elf.zig

@@ -640,20 +640,48 @@ pub const Elf64_Syminfo = extern struct {
 pub const Elf32_Rel = extern struct {
     r_offset: Elf32_Addr,
     r_info: Elf32_Word,
+
+    pub inline fn r_sym(self: @This()) u24 {
+        return @truncate(u24, self.r_info >> 8);
+    }
+    pub inline fn r_type(self: @This()) u8 {
+        return @truncate(u8, self.r_info & 0xff);
+    }
 };
 pub const Elf64_Rel = extern struct {
     r_offset: Elf64_Addr,
     r_info: Elf64_Xword,
+
+    pub inline fn r_sym(self: @This()) u32 {
+        return @truncate(u32, self.r_info >> 32);
+    }
+    pub inline fn r_type(self: @This()) u32 {
+        return @truncate(u32, self.r_info & 0xffffffff);
+    }
 };
 pub const Elf32_Rela = extern struct {
     r_offset: Elf32_Addr,
     r_info: Elf32_Word,
     r_addend: Elf32_Sword,
+
+    pub inline fn r_sym(self: @This()) u24 {
+        return @truncate(u24, self.r_info >> 8);
+    }
+    pub inline fn r_type(self: @This()) u8 {
+        return @truncate(u8, self.r_info & 0xff);
+    }
 };
 pub const Elf64_Rela = extern struct {
     r_offset: Elf64_Addr,
     r_info: Elf64_Xword,
     r_addend: Elf64_Sxword,
+
+    pub inline fn r_sym(self: @This()) u32 {
+        return @truncate(u32, self.r_info >> 32);
+    }
+    pub inline fn r_type(self: @This()) u32 {
+        return @truncate(u32, self.r_info & 0xffffffff);
+    }
 };
 pub const Elf32_Phdr = extern struct {
     p_type: Elf32_Word,
@@ -853,6 +881,16 @@ pub const Dyn = switch (@sizeOf(usize)) {
     8 => Elf64_Dyn,
     else => @compileError("expected pointer size of 32 or 64"),
 };
+pub const Rel = switch (@sizeOf(usize)) {
+    4 => Elf32_Rel,
+    8 => Elf64_Rel,
+    else => @compileError("expected pointer size of 32 or 64"),
+};
+pub const Rela = switch (@sizeOf(usize)) {
+    4 => Elf32_Rela,
+    8 => Elf64_Rela,
+    else => @compileError("expected pointer size of 32 or 64"),
+};
 pub const Shdr = switch (@sizeOf(usize)) {
     4 => Elf32_Shdr,
     8 => Elf64_Shdr,

lib/std/os/bits/linux.zig

@@ -996,7 +996,7 @@ pub const dirent64 = extern struct {
 
 pub const dl_phdr_info = extern struct {
     dlpi_addr: usize,
-    dlpi_name: ?[*]const u8,
+    dlpi_name: ?[*:0]const u8,
     dlpi_phdr: [*]std.elf.Phdr,
     dlpi_phnum: u16,
 };

lib/std/os/linux/start_pie.zig

@@ -0,0 +1,138 @@
+const std = @import("std");
+const elf = std.elf;
+const builtin = @import("builtin");
+const assert = std.debug.assert;
+
+const R_AMD64_RELATIVE = 8;
+const R_386_RELATIVE = 8;
+const R_ARM_RELATIVE = 23;
+const R_AARCH64_RELATIVE = 1027;
+const R_RISCV_RELATIVE = 3;
+
+const ARCH_RELATIVE_RELOC = switch (builtin.arch) {
+    .i386 => R_386_RELATIVE,
+    .x86_64 => R_AMD64_RELATIVE,
+    .arm => R_ARM_RELATIVE,
+    .aarch64 => R_AARCH64_RELATIVE,
+    .riscv64 => R_RISCV_RELATIVE,
+    else => @compileError("unsupported architecture"),
+};
+
+// Just a convoluted (but necessary) way to obtain the address of the _DYNAMIC[]
+// vector as PC-relative so that we can use it before any relocation is applied
+fn getDynamicSymbol() [*]elf.Dyn {
+    const addr = switch (builtin.arch) {
+        .i386 => asm volatile (
+            \\ .weak _DYNAMIC
+            \\ .hidden _DYNAMIC
+            \\ call 1f
+            \\ 1: pop %[ret]
+            \\ lea _DYNAMIC-1b(%[ret]), %[ret]
+            : [ret] "=r" (-> usize)
+        ),
+        .x86_64 => asm volatile (
+            \\ .weak _DYNAMIC
+            \\ .hidden _DYNAMIC
+            \\ lea _DYNAMIC(%%rip), %[ret]
+            : [ret] "=r" (-> usize)
+        ),
+        // Work around the limited offset range of `ldr`
+        .arm => asm volatile (
+            \\ .weak _DYNAMIC
+            \\ .hidden _DYNAMIC
+            \\ ldr %[ret], 1f
+            \\ add %[ret], pc
+            \\ b 2f
+            \\ 1: .word _DYNAMIC-1b
+            \\ 2:
+            : [ret] "=r" (-> usize)
+        ),
+        // A simple `adr` is not enough as it has a limited offset range
+        .aarch64 => asm volatile (
+            \\ .weak _DYNAMIC
+            \\ .hidden _DYNAMIC
+            \\ adrp %[ret], _DYNAMIC
+            \\ add %[ret], %[ret], #:lo12:_DYNAMIC
+            : [ret] "=r" (-> usize)
+        ),
+        .riscv64 => asm volatile (
+            \\ lla %[ret], _DYNAMIC
+            : [ret] "=r" (-> usize)
+        ),
+        else => @compileError("???"),
+    };
+    if (addr == 0) unreachable;
+    return @intToPtr([*]elf.Dyn, addr);
+}
+
+pub fn apply_relocations() void {
+    @setRuntimeSafety(false);
+
+    const dynv = getDynamicSymbol();
+    const auxv = std.os.linux.elf_aux_maybe.?;
+    var at_phent: usize = undefined;
+    var at_phnum: usize = undefined;
+    var at_phdr: usize = undefined;
+    var at_hwcap: usize = undefined;
+
+    {
+        var i: usize = 0;
+        while (auxv[i].a_type != std.elf.AT_NULL) : (i += 1) {
+            switch (auxv[i].a_type) {
+                elf.AT_PHENT => at_phent = auxv[i].a_un.a_val,
+                elf.AT_PHNUM => at_phnum = auxv[i].a_un.a_val,
+                elf.AT_PHDR => at_phdr = auxv[i].a_un.a_val,
+                else => continue,
+            }
+        }
+    }
+
+    // Sanity check
+    assert(at_phent == @sizeOf(elf.Phdr));
+
+    // Search the TLS section
+    const phdrs = (@intToPtr([*]elf.Phdr, at_phdr))[0..at_phnum];
+
+    const base_addr = blk: {
+        for (phdrs) |*phdr| {
+            if (phdr.p_type == elf.PT_DYNAMIC) {
+                break :blk @ptrToInt(&dynv[0]) - phdr.p_vaddr;
+            }
+        }
+        unreachable;
+    };
+
+    var rel_addr: usize = 0;
+    var rela_addr: usize = 0;
+    var rel_size: usize = 0;
+    var rela_size: usize = 0;
+
+    {
+        var i: usize = 0;
+        while (dynv[i].d_tag != elf.DT_NULL) : (i += 1) {
+            switch (dynv[i].d_tag) {
+                elf.DT_REL => rel_addr = base_addr + dynv[i].d_un.d_ptr,
+                elf.DT_RELA => rela_addr = base_addr + dynv[i].d_un.d_ptr,
+                elf.DT_RELSZ => rel_size = dynv[i].d_un.d_val,
+                elf.DT_RELASZ => rela_size = dynv[i].d_un.d_val,
+                else => {},
+            }
+        }
+    }
+
+    // Perform the relocations
+    if (rel_addr != 0) {
+        const rel = @bytesToSlice(elf.Rel, @intToPtr([*]u8, rel_addr)[0..rel_size]);
+        for (rel) |r| {
+            if (r.r_type() != ARCH_RELATIVE_RELOC) continue;
+            @intToPtr(*usize, base_addr + r.r_offset).* += base_addr;
+        }
+    }
+    if (rela_addr != 0) {
+        const rela = @bytesToSlice(elf.Rela, @intToPtr([*]u8, rela_addr)[0..rela_size]);
+        for (rela) |r| {
+            if (r.r_type() != ARCH_RELATIVE_RELOC) continue;
+            @intToPtr(*usize, base_addr + r.r_offset).* += base_addr + @bitCast(usize, r.r_addend);
+        }
+    }
+}

lib/std/os/test.zig

@@ -205,6 +205,8 @@ export fn iter_fn(info: *dl_phdr_info, size: usize, data: ?*usize) i32 {
 test "dl_iterate_phdr" {
     if (builtin.os == .windows or builtin.os == .wasi or builtin.os == .macosx)
         return error.SkipZigTest;
+    if (builtin.position_independent_executable)
+        return error.SkipZigTest;
 
     var counter: usize = 0;
     expect(os.dl_iterate_phdr(usize, iter_fn, &counter) != 0);

lib/std/start.zig

@@ -155,6 +155,12 @@ fn posixCallMainAndExit() noreturn {
         // Find the beginning of the auxiliary vector
         const auxv = @ptrCast([*]std.elf.Auxv, envp.ptr + envp_count + 1);
         std.os.linux.elf_aux_maybe = auxv;
+
+        // Do this as early as possible, the aux vector is needed
+        if (builtin.position_independent_executable) {
+            @import("os/linux/start_pie.zig").apply_relocations();
+        }
+
         // Initialize the TLS area
         const gnu_stack_phdr = std.os.linux.tls.initTLS() orelse @panic("ELF missing stack size");
 

src/all_types.hpp

@@ -1922,6 +1922,12 @@ enum WantPIC {
     WantPICEnabled,
 };
 
+enum WantPIE {
+    WantPIEAuto,
+    WantPIEDisabled,
+    WantPIEEnabled,
+};
+
 enum WantStackCheck {
     WantStackCheckAuto,
     WantStackCheckDisabled,
@@ -2101,6 +2107,7 @@ struct CodeGen {
     Stage2ProgressNode *sub_progress_node;
 
     WantPIC want_pic;
+    WantPIE want_pie;
     WantStackCheck want_stack_check;
     WantCSanitize want_sanitize_c;
     CacheHash cache_hash;
@@ -2175,6 +2182,7 @@ struct CodeGen {
     bool disable_gen_h;
     bool bundle_compiler_rt;
     bool have_pic;
+    bool have_pie;
     bool have_dynamic_link; // this is whether the final thing will be dynamically linked. see also is_dynamic
     bool have_stack_probing;
     bool have_sanitize_c;

src/codegen.cpp

@@ -8233,18 +8233,39 @@ static bool detect_dynamic_link(CodeGen *g) {
     return false;
 }
 
-static bool detect_pic(CodeGen *g) {
+static void detect_pic_pie(CodeGen *g) {
-    if (target_requires_pic(g->zig_target, g->libc_link_lib != nullptr))
+    const bool requires_pic = target_requires_pic(g->zig_target, g->libc_link_lib != nullptr);
-        return true;
+    const bool requires_pie = target_requires_pie(g->zig_target);
+
+    bool have_pic = false;
+    bool have_pie = false;
+
+    switch (g->want_pie) {
+        case WantPIEDisabled:
+            have_pie = false;
+            break;
+        case WantPIEEnabled:
+            have_pie = true;
+            break;
+        case WantPIEAuto:
+            have_pie = requires_pie;
+            break;
+    }
+
     switch (g->want_pic) {
         case WantPICDisabled:
-            return false;
+            have_pic = false;
+            break;
         case WantPICEnabled:
-            return true;
+            have_pic = true;
+            break;
         case WantPICAuto:
-            return g->have_dynamic_link;
+            have_pic = have_pie || g->have_dynamic_link || requires_pic;
+            break;
     }
-    zig_unreachable();
+
+    g->have_pic = have_pic;
+    g->have_pie = have_pie;
 }
 
 static bool detect_stack_probing(CodeGen *g) {
@@ -8309,7 +8330,7 @@ static bool detect_err_ret_tracing(CodeGen *g) {
 
 Buf *codegen_generate_builtin_source(CodeGen *g) {
     g->have_dynamic_link = detect_dynamic_link(g);
-    g->have_pic = detect_pic(g);
+    detect_pic_pie(g);
     g->have_stack_probing = detect_stack_probing(g);
     g->have_sanitize_c = detect_sanitize_c(g);
     g->is_single_threaded = detect_single_threaded(g);
@@ -8465,6 +8486,7 @@ Buf *codegen_generate_builtin_source(CodeGen *g) {
     buf_appendf(contents, "pub const have_error_return_tracing = %s;\n", bool_to_str(g->have_err_ret_tracing));
     buf_appendf(contents, "pub const valgrind_support = %s;\n", bool_to_str(want_valgrind_support(g)));
     buf_appendf(contents, "pub const position_independent_code = %s;\n", bool_to_str(g->have_pic));
+    buf_appendf(contents, "pub const position_independent_executable = %s;\n", bool_to_str(g->have_pie));
     buf_appendf(contents, "pub const strip_debug_info = %s;\n", bool_to_str(g->strip_debug_symbols));
 
     {
@@ -8526,6 +8548,8 @@ static Error define_builtin_compile_vars(CodeGen *g) {
     cache_bool(&cache_hash, g->libc_link_lib != nullptr);
     cache_bool(&cache_hash, g->valgrind_support);
     cache_int(&cache_hash, detect_subsystem(g));
+    cache_bool(&cache_hash, g->have_pic);
+    cache_bool(&cache_hash, g->have_pie);
 
     Buf digest = BUF_INIT;
     buf_resize(&digest, 0);
@@ -8595,7 +8619,7 @@ static void init(CodeGen *g) {
         return;
 
     g->have_dynamic_link = detect_dynamic_link(g);
-    g->have_pic = detect_pic(g);
+    detect_pic_pie(g);
     g->have_stack_probing = detect_stack_probing(g);
     g->have_sanitize_c = detect_sanitize_c(g);
     g->is_single_threaded = detect_single_threaded(g);
@@ -8640,6 +8664,14 @@ static void init(CodeGen *g) {
         reloc_mode = LLVMRelocStatic;
     }
 
+    if (g->have_pic) {
+        ZigLLVMSetModulePICLevel(g->module);
+    }
+
+    if (g->have_pie) {
+        ZigLLVMSetModulePIELevel(g->module);
+    }
+
     const char *target_specific_cpu_args;
     const char *target_specific_features;
     if (g->zig_target->is_native) {
@@ -9327,6 +9359,7 @@ Error create_c_object_cache(CodeGen *g, CacheHash **out_cache_hash, bool verbose
     cache_bool(cache_hash, g->strip_debug_symbols);
     cache_int(cache_hash, g->build_mode);
     cache_bool(cache_hash, g->have_pic);
+    cache_bool(cache_hash, g->have_pie);
     cache_bool(cache_hash, g->have_sanitize_c);
     cache_bool(cache_hash, want_valgrind_support(g));
     cache_bool(cache_hash, g->function_sections);
@@ -10104,6 +10137,7 @@ static Error check_cache(CodeGen *g, Buf *manifest_dir, Buf *digest) {
     cache_bool(ch, g->bundle_compiler_rt);
     cache_bool(ch, want_valgrind_support(g));
     cache_bool(ch, g->have_pic);
+    cache_bool(ch, g->have_pie);
     cache_bool(ch, g->have_dynamic_link);
     cache_bool(ch, g->have_stack_probing);
     cache_bool(ch, g->have_sanitize_c);
@@ -10224,7 +10258,7 @@ void codegen_build_and_link(CodeGen *g) {
     }
 
     g->have_dynamic_link = detect_dynamic_link(g);
-    g->have_pic = detect_pic(g);
+    detect_pic_pie(g);
     g->is_single_threaded = detect_single_threaded(g);
     g->have_err_ret_tracing = detect_err_ret_tracing(g);
     g->have_sanitize_c = detect_sanitize_c(g);
@@ -10429,6 +10463,7 @@ CodeGen *create_child_codegen(CodeGen *parent_gen, Buf *root_src_path, OutType o
 
     codegen_set_strip(child_gen, parent_gen->strip_debug_symbols);
     child_gen->want_pic = parent_gen->have_pic ? WantPICEnabled : WantPICDisabled;
+    child_gen->want_pie = parent_gen->have_pie ? WantPIEEnabled : WantPIEDisabled;
     child_gen->valgrind_support = ValgrindSupportDisabled;
 
     codegen_set_errmsg_color(child_gen, parent_gen->err_color);

src/link.cpp

@@ -1469,6 +1469,14 @@ static const char *get_libc_crt_file(CodeGen *parent, const char *file, Stage2Pr
             c_file->args.append("-fno-stack-protector");
             c_file->args.append("-DCRT");
             return build_libc_object(parent, "crt1", c_file, progress_node);
+        } else if (strcmp(file, "rcrt1.o") == 0) {
+            CFile *c_file = allocate<CFile>(1);
+            c_file->source_path = path_from_libc(parent, "musl" OS_SEP "crt" OS_SEP "rcrt1.c");
+            musl_add_cc_args(parent, c_file, false);
+            c_file->args.append("-fno-stack-protector");
+            c_file->args.append("-DCRT");
+            c_file->args.append("-fPIC");
+            return build_libc_object(parent, "rcrt1", c_file, progress_node);
         } else if (strcmp(file, "Scrt1.o") == 0) {
             CFile *c_file = allocate<CFile>(1);
             c_file->source_path = path_from_libc(parent, "musl" OS_SEP "crt" OS_SEP "Scrt1.c");
@@ -1661,6 +1669,11 @@ static void construct_linker_job_elf(LinkJob *lj) {
         } else {
             lj->args.append("-static");
         }
+
+        if (g->out_type == OutTypeExe && g->have_pie) {
+            lj->args.append("-pie");
+            lj->args.append("--no-dynamic-linker");
+        }
     } else if (is_dyn_lib) {
         lj->args.append("-shared");
 
@@ -1668,10 +1681,6 @@ static void construct_linker_job_elf(LinkJob *lj) {
         soname = buf_sprintf("lib%s.so.%" ZIG_PRI_usize, buf_ptr(g->root_out_name), g->version_major);
     }
 
-    if (target_requires_pie(g->zig_target) && g->out_type == OutTypeExe) {
-        lj->args.append("-pie");
-    }
-
     lj->args.append("-o");
     lj->args.append(buf_ptr(&g->output_file_path));
 
@@ -1686,7 +1695,7 @@ static void construct_linker_job_elf(LinkJob *lj) {
                 crt1o = "crtbegin_static.o";
             }
         } else if (!g->have_dynamic_link) {
-            crt1o = "crt1.o";
+            crt1o = g->have_pie ? "rcrt1.o" : "crt1.o";
         } else {
             crt1o = "Scrt1.o";
         }

src/main.cpp

@@ -525,6 +525,7 @@ int main(int argc, char **argv) {
     Buf *main_pkg_path = nullptr;
     ValgrindSupport valgrind_support = ValgrindSupportAuto;
     WantPIC want_pic = WantPICAuto;
+    WantPIE want_pie = WantPIEAuto;
     WantStackCheck want_stack_check = WantStackCheckAuto;
     WantCSanitize want_sanitize_c = WantCSanitizeAuto;
     bool function_sections = false;
@@ -721,6 +722,10 @@ int main(int argc, char **argv) {
                 want_pic = WantPICEnabled;
             } else if (strcmp(arg, "-fno-PIC") == 0) {
                 want_pic = WantPICDisabled;
+            } else if (strcmp(arg, "-fPIE") == 0) {
+                want_pie = WantPIEEnabled;
+            } else if (strcmp(arg, "-fno-PIE") == 0) {
+                want_pie = WantPIEDisabled;
             } else if (strcmp(arg, "-fstack-check") == 0) {
                 want_stack_check = WantStackCheckEnabled;
             } else if (strcmp(arg, "-fno-stack-check") == 0) {
@@ -1099,6 +1104,7 @@ int main(int argc, char **argv) {
         g->subsystem = subsystem;
         g->valgrind_support = valgrind_support;
         g->want_pic = want_pic;
+        g->want_pie = want_pie;
         g->want_stack_check = want_stack_check;
         g->want_sanitize_c = want_sanitize_c;
         g->want_single_threaded = want_single_threaded;
@@ -1199,6 +1205,7 @@ int main(int argc, char **argv) {
             if (llvm_argv.length >= 2) codegen_set_llvm_argv(g, llvm_argv.items + 1, llvm_argv.length - 2);
             g->valgrind_support = valgrind_support;
             g->want_pic = want_pic;
+            g->want_pie = want_pie;
             g->want_stack_check = want_stack_check;
             g->want_sanitize_c = want_sanitize_c;
             g->subsystem = subsystem;

src/zig_llvm.cpp

@@ -877,6 +877,14 @@ void ZigLLVMAddModuleCodeViewFlag(LLVMModuleRef module) {
     unwrap(module)->addModuleFlag(Module::Warning, "CodeView", 1);
 }
 
+void ZigLLVMSetModulePICLevel(LLVMModuleRef module) {
+    unwrap(module)->setPICLevel(PICLevel::Level::BigPIC);
+}
+
+void ZigLLVMSetModulePIELevel(LLVMModuleRef module) {
+    unwrap(module)->setPIELevel(PIELevel::Level::Large);
+}
+
 static AtomicOrdering mapFromLLVMOrdering(LLVMAtomicOrdering Ordering) {
     switch (Ordering) {
         case LLVMAtomicOrderingNotAtomic: return AtomicOrdering::NotAtomic;

src/zig_llvm.h

@@ -158,6 +158,8 @@ ZIG_EXTERN_C struct ZigLLVMDIBuilder *ZigLLVMCreateDIBuilder(LLVMModuleRef modul
 ZIG_EXTERN_C void ZigLLVMDisposeDIBuilder(struct ZigLLVMDIBuilder *dbuilder);
 ZIG_EXTERN_C void ZigLLVMAddModuleDebugInfoFlag(LLVMModuleRef module);
 ZIG_EXTERN_C void ZigLLVMAddModuleCodeViewFlag(LLVMModuleRef module);
+ZIG_EXTERN_C void ZigLLVMSetModulePICLevel(LLVMModuleRef module);
+ZIG_EXTERN_C void ZigLLVMSetModulePIELevel(LLVMModuleRef module);
 
 ZIG_EXTERN_C void ZigLLVMSetCurrentDebugLocation(LLVMBuilderRef builder, int line, int column,
         struct ZigLLVMDIScope *scope);