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macho: do not skip over SUBTRACTOR reloc when dead stripping

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This commit is contained in:
Jakub Konka 2022-10-20 22:50:39 +02:00
parent f8cbe29a17
commit 0cc4d54781
1 changed files with 21 additions and 9 deletions
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30
src/link/MachO/dead_strip.zig
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@ -129,25 +129,37 @@ fn markLive(
const relocs = Atom.getAtomRelocs(zld, atom_index);
const reverse_lookup = reverse_lookups[atom.getFile().?];
for (relocs) |rel| {
switch (cpu_arch) {
.aarch64 => {
const target = switch (cpu_arch) {
.aarch64 => blk: {
const rel_type = @intToEnum(macho.reloc_type_arm64, rel.r_type);
switch (rel_type) {
.ARM64_RELOC_ADDEND, .ARM64_RELOC_SUBTRACTOR => continue,
else => {},
.ARM64_RELOC_ADDEND => continue,
.ARM64_RELOC_SUBTRACTOR => {
const sym_index = reverse_lookup[rel.r_symbolnum];
break :blk SymbolWithLoc{
.sym_index = sym_index,
.file = atom.file,
};
},
else => break :blk try Atom.parseRelocTarget(zld, atom_index, rel, reverse_lookup),
}
},
.x86_64 => {
.x86_64 => blk: {
const rel_type = @intToEnum(macho.reloc_type_x86_64, rel.r_type);
switch (rel_type) {
.X86_64_RELOC_SUBTRACTOR => continue,
else => {},
.X86_64_RELOC_SUBTRACTOR => {
const sym_index = reverse_lookup[rel.r_symbolnum];
break :blk SymbolWithLoc{
.sym_index = sym_index,
.file = atom.file,
};
},
else => break :blk try Atom.parseRelocTarget(zld, atom_index, rel, reverse_lookup),
}
},
else => unreachable,
}
};
const target = try Atom.parseRelocTarget(zld, atom_index, rel, reverse_lookup);
const target_sym = zld.getSymbol(target);
if (target_sym.undf()) continue;
if (target.getFile() == null) {