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[Mach-O] wip

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This commit is contained in:
Rui Ueyama 2021-10-11 14:10:30 +09:00
parent 43f2e46f34
commit 031de0df32
2 changed files with 11 additions and 11 deletions
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8
macho/mold.h
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@ -30,8 +30,8 @@ struct Relocation {
Subsection *subsec = nullptr;
};
struct UnwindEntry {
UnwindEntry(u32 len, u32 info)
struct UnwindRecord {
UnwindRecord(u32 len, u32 info)
: code_len(len), compact_unwind_info(info) {}
Subsection *subsec = nullptr;
@ -56,7 +56,7 @@ public:
std::vector<Symbol *> syms;
std::span<MachSym> mach_syms;
std::vector<UnwindEntry> unwind_entries;
std::vector<UnwindRecord> unwind_records;
private:
ObjectFile(Context &ctx, MappedFile<Context> *mf);
@ -80,7 +80,7 @@ public:
std::string_view contents;
std::vector<Subsection> subsections;
std::vector<Relocation> rels;
std::vector<UnwindEntry> unwind_entries;
std::vector<UnwindRecord> unwind_records;
};
std::ostream &operator<<(std::ostream &out, const InputSection &sec);

14
macho/object-file.cc
View File

@ -74,12 +74,12 @@ void ObjectFile::parse_compact_unwind(Context &ctx, MachSection &hdr) {
Fatal(ctx) << *this << ": invalid __compact_unwind section size";
i64 num_entries = hdr.size / sizeof(CompactUnwindEntry);
unwind_entries.reserve(num_entries);
unwind_records.reserve(num_entries);
// Read compact unwind entries
for (i64 i = 0; i < num_entries; i++) {
CompactUnwindEntry &src = ((CompactUnwindEntry *)mf->data)[i];
unwind_entries.emplace_back(src.code_len, src.compact_unwind_info);
unwind_records.emplace_back(src.code_len, src.compact_unwind_info);
}
// Read relocations
@ -91,7 +91,7 @@ void ObjectFile::parse_compact_unwind(Context &ctx, MachSection &hdr) {
i64 idx = r.offset / sizeof(CompactUnwindEntry);
CompactUnwindEntry &src = ((CompactUnwindEntry *)mf->data)[idx];
UnwindEntry &dst = unwind_entries[idx];
UnwindRecord &dst = unwind_records[idx];
switch (r.offset % sizeof(CompactUnwindEntry)) {
case offsetof(CompactUnwindEntry, code_start): {
@ -119,22 +119,22 @@ void ObjectFile::parse_compact_unwind(Context &ctx, MachSection &hdr) {
}
for (i64 i = 0; i < num_entries; i++)
if (!unwind_entries[i].subsec)
if (!unwind_records[i].subsec)
Fatal(ctx) << ": __compact_unwind: missing relocation at " << i;
// Sort unwind entries by offset
sort(unwind_entries, [](const UnwindEntry &a, const UnwindEntry &b) {
sort(unwind_records, [](const UnwindRecord &a, const UnwindRecord &b) {
return std::tuple(a.subsec->input_addr, a.offset) <
std::tuple(b.subsec->input_addr, b.offset);
});
// Associate unwind entries to subsections
for (i64 i = 0; i < num_entries;) {
Subsection &subsec = *unwind_entries[i].subsec;
Subsection &subsec = *unwind_records[i].subsec;
subsec.unwind_offset = i;
i64 j = i + 1;
while (j < num_entries && unwind_entries[j].subsec == &subsec)
while (j < num_entries && unwind_records[j].subsec == &subsec)
j++;
subsec.nunwind = j - i;
i = j;