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link.Elf: unstable sort for section headers

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using name as tie-breaker.
This commit is contained in:
Andrew Kelley 2024-10-21 17:18:00 -07:00
parent 1c45903274
commit ccac11196b
1 changed files with 9 additions and 3 deletions
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12
src/link/Elf.zig
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@ -3079,8 +3079,14 @@ pub fn sortShdrs(
};
pub fn lessThan(ctx: Context, lhs: @This(), rhs: @This()) bool {
return shdrRank(ctx.shdrs[lhs.shndx], ctx.shstrtab) <
shdrRank(ctx.shdrs[rhs.shndx], ctx.shstrtab);
const lhs_rank = shdrRank(ctx.shdrs[lhs.shndx], ctx.shstrtab);
const rhs_rank = shdrRank(ctx.shdrs[rhs.shndx], ctx.shstrtab);
if (lhs_rank == rhs_rank) {
const lhs_name = shString(ctx.shstrtab, ctx.shdrs[lhs.shndx].sh_name);
const rhs_name = shString(ctx.shstrtab, ctx.shdrs[rhs.shndx].sh_name);
return std.mem.lessThan(u8, lhs_name, rhs_name);
}
return lhs_rank < rhs_rank;
}
};
@ -3096,7 +3102,7 @@ pub fn sortShdrs(
.shdrs = shdrs,
.shstrtab = shstrtab,
};
mem.sort(Entry, entries, sort_context, Entry.lessThan);
mem.sortUnstable(Entry, entries, sort_context, Entry.lessThan);
const backlinks = try gpa.alloc(u32, entries.len);
defer gpa.free(backlinks);