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[Mach-O] wip

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This commit is contained in:
Rui Ueyama 2021-09-18 20:29:15 +09:00
parent 1f3f019a59
commit 3a503ce2cc
1 changed files with 27 additions and 30 deletions
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57
macho/output-chunks.cc
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@ -3,7 +3,7 @@
namespace mold::macho {
void OutputMachHeader::copy_buf(Context &ctx) {
MachHeader &mhdr = *(MachHeader *)(ctx.buf + parent.cmd.fileoff + hdr.offset);
MachHeader &mhdr = *(MachHeader *)(ctx.buf + hdr.offset);
memset(&mhdr, 0, sizeof(mhdr));
mhdr.magic = 0xfeedfacf;
@ -20,18 +20,16 @@ static DyldInfoCommand create_dyld_info_only_cmd(Context &ctx) {
cmd.cmd = LC_DYLD_INFO_ONLY;
cmd.cmdsize = sizeof(cmd);
i64 off = ctx.linkedit_seg->cmd.fileoff;
cmd.rebase_off = off + ctx.rebase->hdr.offset;
cmd.rebase_off = ctx.rebase->hdr.offset;
cmd.rebase_size = ctx.rebase->hdr.size;
cmd.bind_off = off + ctx.bind->hdr.offset;
cmd.bind_off = ctx.bind->hdr.offset;
cmd.bind_size = ctx.bind->hdr.size;
cmd.lazy_bind_off = off + ctx.lazy_bind->hdr.offset;
cmd.lazy_bind_off = ctx.lazy_bind->hdr.offset;
cmd.lazy_bind_size = ctx.lazy_bind->hdr.size;
cmd.export_off = off += ctx.export_->hdr.offset;
cmd.export_off = ctx.export_->hdr.offset;
cmd.export_size = ctx.export_->hdr.size;
return cmd;
}
@ -40,9 +38,9 @@ static SymtabCommand create_symtab_cmd(Context &ctx) {
SymtabCommand cmd = {};
cmd.cmd = LC_SYMTAB;
cmd.cmdsize = sizeof(cmd);
cmd.symoff = ctx.linkedit_seg->cmd.fileoff + ctx.symtab->hdr.offset;
cmd.symoff = ctx.symtab->hdr.offset;
cmd.nsyms = ctx.symtab->contents.size() / sizeof(MachSym);
cmd.stroff = ctx.linkedit_seg->cmd.fileoff + ctx.strtab->hdr.offset;
cmd.stroff = ctx.strtab->hdr.offset;
cmd.strsize = ctx.strtab->contents.size();
return cmd;
}
@ -56,8 +54,7 @@ static DysymtabCommand create_dysymtab_cmd(Context &ctx) {
cmd.nextdefsym = 3;
cmd.iundefsym = 4;
cmd.nundefsym = 2;
cmd.indirectsymoff =
ctx.linkedit_seg->cmd.fileoff + ctx.indir_symtab->hdr.offset;
cmd.indirectsymoff = ctx.indir_symtab->hdr.offset;
cmd.nindirectsyms = ctx.indir_symtab->hdr.size / 4;
return cmd;
}
@ -123,7 +120,7 @@ static LinkEditDataCommand create_function_starts_cmd(Context &ctx) {
LinkEditDataCommand cmd = {};
cmd.cmd = LC_FUNCTION_STARTS;
cmd.cmdsize = sizeof(cmd);
cmd.dataoff = ctx.linkedit_seg->cmd.fileoff + ctx.function_starts->hdr.offset;
cmd.dataoff = ctx.function_starts->hdr.offset;
cmd.datasize = ctx.function_starts->hdr.size;
return cmd;
}
@ -232,7 +229,7 @@ void OutputLoadCommand::update_hdr(Context &ctx) {
void OutputLoadCommand::copy_buf(Context &ctx) {
std::vector<u8> contents;
std::tie(contents, std::ignore) = create_load_commands(ctx);
write_vector(ctx.buf + parent.cmd.fileoff + hdr.offset, contents);
write_vector(ctx.buf + hdr.offset, contents);
}
OutputSegment::OutputSegment(std::string_view name, u32 prot, u32 flags) {
@ -279,7 +276,7 @@ void OutputSegment::update_hdr(Context &ctx) {
sec.update_hdr(ctx);
offset = align_to(offset, 1 << sec.hdr.p2align);
sec.hdr.addr = cmd.vmaddr + offset;
sec.hdr.offset = offset;
sec.hdr.offset = cmd.fileoff + offset;
offset += sec.hdr.size;
};
@ -309,35 +306,35 @@ void OutputSegment::copy_buf(Context &ctx) {
}
void OutputRebaseSection::copy_buf(Context &ctx) {
write_vector(ctx.buf + parent.cmd.fileoff + hdr.offset, contents);
write_vector(ctx.buf + hdr.offset, contents);
}
void OutputBindSection::copy_buf(Context &ctx) {
write_vector(ctx.buf + parent.cmd.fileoff + hdr.offset, contents);
write_vector(ctx.buf + hdr.offset, contents);
}
void OutputLazyBindSection::copy_buf(Context &ctx) {
write_vector(ctx.buf + parent.cmd.fileoff + hdr.offset, contents);
write_vector(ctx.buf + hdr.offset, contents);
}
void OutputExportSection::copy_buf(Context &ctx) {
write_vector(ctx.buf + parent.cmd.fileoff + hdr.offset, contents);
write_vector(ctx.buf + hdr.offset, contents);
}
void OutputFunctionStartsSection::copy_buf(Context &ctx) {
write_vector(ctx.buf + parent.cmd.fileoff + hdr.offset, contents);
write_vector(ctx.buf + hdr.offset, contents);
}
void OutputSymtabSection::copy_buf(Context &ctx) {
write_vector(ctx.buf + parent.cmd.fileoff + hdr.offset, contents);
write_vector(ctx.buf + hdr.offset, contents);
}
void OutputStrtabSection::copy_buf(Context &ctx) {
write_vector(ctx.buf + parent.cmd.fileoff + hdr.offset, contents);
write_vector(ctx.buf + hdr.offset, contents);
}
void OutputIndirectSymtabSection::copy_buf(Context &ctx) {
write_vector(ctx.buf + parent.cmd.fileoff + hdr.offset, contents);
write_vector(ctx.buf + hdr.offset, contents);
}
OutputSection::OutputSection(OutputSegment &parent)
@ -354,7 +351,7 @@ TextSection::TextSection(OutputSegment &parent) : OutputSection(parent) {
void TextSection::copy_buf(Context &ctx) {
write_vector(ctx.buf + parent.cmd.fileoff + hdr.offset, contents);
write_vector(ctx.buf + hdr.offset, contents);
}
StubsSection::StubsSection(OutputSegment &parent) : OutputSection(parent) {
@ -366,7 +363,7 @@ StubsSection::StubsSection(OutputSegment &parent) : OutputSection(parent) {
}
void StubsSection::copy_buf(Context &ctx) {
write_vector(ctx.buf + parent.cmd.fileoff + hdr.offset, contents);
write_vector(ctx.buf + hdr.offset, contents);
}
StubHelperSection::StubHelperSection(OutputSegment &parent)
@ -378,7 +375,7 @@ StubHelperSection::StubHelperSection(OutputSegment &parent)
}
void StubHelperSection::copy_buf(Context &ctx) {
write_vector(ctx.buf + parent.cmd.fileoff + hdr.offset, contents);
write_vector(ctx.buf + hdr.offset, contents);
}
CstringSection::CstringSection(OutputSegment &parent)
@ -390,7 +387,7 @@ CstringSection::CstringSection(OutputSegment &parent)
}
void CstringSection::copy_buf(Context &ctx) {
memcpy(ctx.buf + parent.cmd.fileoff + hdr.offset, contents, sizeof(contents));
memcpy(ctx.buf + hdr.offset, contents, sizeof(contents));
}
UnwindInfoSection::UnwindInfoSection(OutputSegment &parent)
@ -401,12 +398,12 @@ UnwindInfoSection::UnwindInfoSection(OutputSegment &parent)
}
void UnwindInfoSection::copy_buf(Context &ctx) {
write_vector(ctx.buf + parent.cmd.fileoff + hdr.offset, contents);
write_vector(ctx.buf + hdr.offset, contents);
}
GotSection::GotSection(OutputSegment &parent)
: OutputSection(parent) {
strcpy(hdr.sectname, "__cstring");
strcpy(hdr.sectname, "__got");
hdr.p2align = __builtin_ctz(8);
hdr.type = S_NON_LAZY_SYMBOL_POINTERS;
hdr.size = 8;
@ -421,7 +418,7 @@ LaSymbolPtrSection::LaSymbolPtrSection(OutputSegment &parent)
}
void LaSymbolPtrSection::copy_buf(Context &ctx) {
write_vector(ctx.buf + parent.cmd.fileoff + hdr.offset, contents);
write_vector(ctx.buf + hdr.offset, contents);
}
DataSection::DataSection(OutputSegment &parent)
@ -435,7 +432,7 @@ DataSection::DataSection(OutputSegment &parent)
}
void DataSection::copy_buf(Context &ctx) {
write_vector(ctx.buf + parent.cmd.fileoff + hdr.offset, contents);
write_vector(ctx.buf + hdr.offset, contents);
}
} // namespace mold::macho