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lib/std/Build/CheckObject: dump Mach-O header

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This commit is contained in:
Jakub Konka 2023-12-08 19:56:47 +01:00
parent d270020114
commit 36981d46a3
1 changed files with 70 additions and 0 deletions
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70
lib/std/Build/Step/CheckObject.zig
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@ -567,6 +567,8 @@ const MachODumper = struct {
var sections = std.ArrayList(macho.section_64).init(gpa);
var imports = std.ArrayList([]const u8).init(gpa);
try dumpHeader(hdr, writer);
var it: LoadCommandIterator = .{
.ncmds = hdr.ncmds,
.buffer = bytes[@sizeOf(macho.mach_header_64)..][0..hdr.sizeofcmds],
@ -609,6 +611,74 @@ const MachODumper = struct {
return output.toOwnedSlice();
}
fn dumpHeader(hdr: macho.mach_header_64, writer: anytype) !void {
const cputype = switch (hdr.cputype) {
macho.CPU_TYPE_ARM64 => "ARM64",
macho.CPU_TYPE_X86_64 => "X86_64",
else => "Unknown",
};
const filetype = switch (hdr.filetype) {
macho.MH_OBJECT => "MH_OBJECT",
macho.MH_EXECUTE => "MH_EXECUTE",
macho.MH_FVMLIB => "MH_FVMLIB",
macho.MH_CORE => "MH_CORE",
macho.MH_PRELOAD => "MH_PRELOAD",
macho.MH_DYLIB => "MH_DYLIB",
macho.MH_DYLINKER => "MH_DYLINKER",
macho.MH_BUNDLE => "MH_BUNDLE",
macho.MH_DYLIB_STUB => "MH_DYLIB_STUB",
macho.MH_DSYM => "MH_DSYM",
macho.MH_KEXT_BUNDLE => "MH_KEXT_BUNDLE",
else => "Unknown",
};
try writer.print(
\\header
\\cputype {s}
\\filetype {s}
\\ncmds {d}
\\sizeofcmds {x}
\\flags
, .{
cputype,
filetype,
hdr.ncmds,
hdr.sizeofcmds,
});
if (hdr.flags > 0) {
if (hdr.flags & macho.MH_NOUNDEFS != 0) try writer.writeAll(" NOUNDEFS");
if (hdr.flags & macho.MH_INCRLINK != 0) try writer.writeAll(" INCRLINK");
if (hdr.flags & macho.MH_DYLDLINK != 0) try writer.writeAll(" DYLDLINK");
if (hdr.flags & macho.MH_BINDATLOAD != 0) try writer.writeAll(" BINDATLOAD");
if (hdr.flags & macho.MH_PREBOUND != 0) try writer.writeAll(" PREBOUND");
if (hdr.flags & macho.MH_SPLIT_SEGS != 0) try writer.writeAll(" SPLIT_SEGS");
if (hdr.flags & macho.MH_LAZY_INIT != 0) try writer.writeAll(" LAZY_INIT");
if (hdr.flags & macho.MH_TWOLEVEL != 0) try writer.writeAll(" TWOLEVEL");
if (hdr.flags & macho.MH_FORCE_FLAT != 0) try writer.writeAll(" FORCE_FLAT");
if (hdr.flags & macho.MH_NOMULTIDEFS != 0) try writer.writeAll(" NOMULTIDEFS");
if (hdr.flags & macho.MH_NOFIXPREBINDING != 0) try writer.writeAll(" NOFIXPREBINDING");
if (hdr.flags & macho.MH_PREBINDABLE != 0) try writer.writeAll(" PREBINDABLE");
if (hdr.flags & macho.MH_ALLMODSBOUND != 0) try writer.writeAll(" ALLMODSBOUND");
if (hdr.flags & macho.MH_SUBSECTIONS_VIA_SYMBOLS != 0) try writer.writeAll(" SUBSECTIONS_VIA_SYMBOLS");
if (hdr.flags & macho.MH_CANONICAL != 0) try writer.writeAll(" CANONICAL");
if (hdr.flags & macho.MH_WEAK_DEFINES != 0) try writer.writeAll(" WEAK_DEFINES");
if (hdr.flags & macho.MH_BINDS_TO_WEAK != 0) try writer.writeAll(" BINDS_TO_WEAK");
if (hdr.flags & macho.MH_ALLOW_STACK_EXECUTION != 0) try writer.writeAll(" ALLOW_STACK_EXECUTION");
if (hdr.flags & macho.MH_ROOT_SAFE != 0) try writer.writeAll(" ROOT_SAFE");
if (hdr.flags & macho.MH_SETUID_SAFE != 0) try writer.writeAll(" SETUID_SAFE");
if (hdr.flags & macho.MH_NO_REEXPORTED_DYLIBS != 0) try writer.writeAll(" NO_REEXPORTED_DYLIBS");
if (hdr.flags & macho.MH_PIE != 0) try writer.writeAll(" PIE");
if (hdr.flags & macho.MH_DEAD_STRIPPABLE_DYLIB != 0) try writer.writeAll(" DEAD_STRIPPABLE_DYLIB");
if (hdr.flags & macho.MH_HAS_TLV_DESCRIPTORS != 0) try writer.writeAll(" HAS_TLV_DESCRIPTORS");
if (hdr.flags & macho.MH_NO_HEAP_EXECUTION != 0) try writer.writeAll(" NO_HEAP_EXECUTION");
if (hdr.flags & macho.MH_APP_EXTENSION_SAFE != 0) try writer.writeAll(" APP_EXTENSION_SAFE");
if (hdr.flags & macho.MH_NLIST_OUTOFSYNC_WITH_DYLDINFO != 0) try writer.writeAll(" NLIST_OUTOFSYNC_WITH_DYLDINFO");
}
try writer.writeByte('\n');
}
fn dumpLoadCommand(lc: macho.LoadCommandIterator.LoadCommand, index: usize, writer: anytype) !void {
// print header first
try writer.print(