forked from OSchip/llvm-project
565 lines
18 KiB
C++
565 lines
18 KiB
C++
//===- yaml2macho - Convert YAML to a Mach object file --------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
///
|
|
/// \file
|
|
/// \brief The Mach component of yaml2obj.
|
|
///
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "yaml2obj.h"
|
|
#include "llvm/ObjectYAML/ObjectYAML.h"
|
|
#include "llvm/Support/Error.h"
|
|
#include "llvm/Support/LEB128.h"
|
|
#include "llvm/Support/MachO.h"
|
|
#include "llvm/Support/YAMLTraits.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
|
|
#include "llvm/Support/Format.h"
|
|
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
|
|
class MachOWriter {
|
|
public:
|
|
MachOWriter(MachOYAML::Object &Obj) : Obj(Obj), is64Bit(true), fileStart(0) {
|
|
is64Bit = Obj.Header.magic == MachO::MH_MAGIC_64 ||
|
|
Obj.Header.magic == MachO::MH_CIGAM_64;
|
|
memset(reinterpret_cast<void *>(&Header), 0, sizeof(MachO::mach_header_64));
|
|
}
|
|
|
|
Error writeMachO(raw_ostream &OS);
|
|
|
|
private:
|
|
Error writeHeader(raw_ostream &OS);
|
|
Error writeLoadCommands(raw_ostream &OS);
|
|
Error writeSectionData(raw_ostream &OS);
|
|
Error writeLinkEditData(raw_ostream &OS);
|
|
Error writeDWARFData(raw_ostream &OS,
|
|
std::vector<MachOYAML::Section> &Sections);
|
|
void writeBindOpcodes(raw_ostream &OS,
|
|
std::vector<MachOYAML::BindOpcode> &BindOpcodes);
|
|
// LinkEdit writers
|
|
Error writeRebaseOpcodes(raw_ostream &OS);
|
|
Error writeBasicBindOpcodes(raw_ostream &OS);
|
|
Error writeWeakBindOpcodes(raw_ostream &OS);
|
|
Error writeLazyBindOpcodes(raw_ostream &OS);
|
|
Error writeNameList(raw_ostream &OS);
|
|
Error writeStringTable(raw_ostream &OS);
|
|
Error writeExportTrie(raw_ostream &OS);
|
|
|
|
void dumpExportEntry(raw_ostream &OS, MachOYAML::ExportEntry &Entry);
|
|
void ZeroToOffset(raw_ostream &OS, size_t offset);
|
|
|
|
MachOYAML::Object &Obj;
|
|
bool is64Bit;
|
|
uint64_t fileStart;
|
|
|
|
MachO::mach_header_64 Header;
|
|
};
|
|
|
|
Error MachOWriter::writeMachO(raw_ostream &OS) {
|
|
fileStart = OS.tell();
|
|
if (auto Err = writeHeader(OS))
|
|
return Err;
|
|
if (auto Err = writeLoadCommands(OS))
|
|
return Err;
|
|
if (auto Err = writeSectionData(OS))
|
|
return Err;
|
|
return Error::success();
|
|
}
|
|
|
|
Error MachOWriter::writeHeader(raw_ostream &OS) {
|
|
Header.magic = Obj.Header.magic;
|
|
Header.cputype = Obj.Header.cputype;
|
|
Header.cpusubtype = Obj.Header.cpusubtype;
|
|
Header.filetype = Obj.Header.filetype;
|
|
Header.ncmds = Obj.Header.ncmds;
|
|
Header.sizeofcmds = Obj.Header.sizeofcmds;
|
|
Header.flags = Obj.Header.flags;
|
|
Header.reserved = Obj.Header.reserved;
|
|
|
|
auto header_size =
|
|
is64Bit ? sizeof(MachO::mach_header_64) : sizeof(MachO::mach_header);
|
|
OS.write((const char *)&Header, header_size);
|
|
|
|
return Error::success();
|
|
}
|
|
|
|
template <typename SectionType>
|
|
SectionType constructSection(MachOYAML::Section Sec) {
|
|
SectionType TempSec;
|
|
memcpy(reinterpret_cast<void *>(&TempSec.sectname[0]), &Sec.sectname[0], 16);
|
|
memcpy(reinterpret_cast<void *>(&TempSec.segname[0]), &Sec.segname[0], 16);
|
|
TempSec.addr = Sec.addr;
|
|
TempSec.size = Sec.size;
|
|
TempSec.offset = Sec.offset;
|
|
TempSec.align = Sec.align;
|
|
TempSec.reloff = Sec.reloff;
|
|
TempSec.nreloc = Sec.nreloc;
|
|
TempSec.flags = Sec.flags;
|
|
TempSec.reserved1 = Sec.reserved1;
|
|
TempSec.reserved2 = Sec.reserved2;
|
|
return TempSec;
|
|
}
|
|
|
|
template <typename StructType>
|
|
size_t writeLoadCommandData(MachOYAML::LoadCommand &LC, raw_ostream &OS) {
|
|
return 0;
|
|
}
|
|
|
|
template <>
|
|
size_t writeLoadCommandData<MachO::segment_command>(MachOYAML::LoadCommand &LC,
|
|
raw_ostream &OS) {
|
|
size_t BytesWritten = 0;
|
|
for (const auto &Sec : LC.Sections) {
|
|
auto TempSec = constructSection<MachO::section>(Sec);
|
|
OS.write(reinterpret_cast<const char *>(&(TempSec)),
|
|
sizeof(MachO::section));
|
|
BytesWritten += sizeof(MachO::section);
|
|
}
|
|
return BytesWritten;
|
|
}
|
|
|
|
template <>
|
|
size_t
|
|
writeLoadCommandData<MachO::segment_command_64>(MachOYAML::LoadCommand &LC,
|
|
raw_ostream &OS) {
|
|
size_t BytesWritten = 0;
|
|
for (const auto &Sec : LC.Sections) {
|
|
auto TempSec = constructSection<MachO::section_64>(Sec);
|
|
TempSec.reserved3 = Sec.reserved3;
|
|
OS.write(reinterpret_cast<const char *>(&(TempSec)),
|
|
sizeof(MachO::section_64));
|
|
BytesWritten += sizeof(MachO::section_64);
|
|
}
|
|
return BytesWritten;
|
|
}
|
|
|
|
size_t writePayloadString(MachOYAML::LoadCommand &LC, raw_ostream &OS) {
|
|
size_t BytesWritten = 0;
|
|
if (!LC.PayloadString.empty()) {
|
|
OS.write(LC.PayloadString.c_str(), LC.PayloadString.length());
|
|
BytesWritten = LC.PayloadString.length();
|
|
}
|
|
return BytesWritten;
|
|
}
|
|
|
|
template <>
|
|
size_t writeLoadCommandData<MachO::dylib_command>(MachOYAML::LoadCommand &LC,
|
|
raw_ostream &OS) {
|
|
return writePayloadString(LC, OS);
|
|
}
|
|
|
|
template <>
|
|
size_t writeLoadCommandData<MachO::dylinker_command>(MachOYAML::LoadCommand &LC,
|
|
raw_ostream &OS) {
|
|
return writePayloadString(LC, OS);
|
|
}
|
|
|
|
template <>
|
|
size_t writeLoadCommandData<MachO::rpath_command>(MachOYAML::LoadCommand &LC,
|
|
raw_ostream &OS) {
|
|
return writePayloadString(LC, OS);
|
|
}
|
|
|
|
void ZeroFillBytes(raw_ostream &OS, size_t Size) {
|
|
std::vector<uint8_t> FillData;
|
|
FillData.insert(FillData.begin(), Size, 0);
|
|
OS.write(reinterpret_cast<char *>(FillData.data()), Size);
|
|
}
|
|
|
|
void Fill(raw_ostream &OS, size_t Size, uint32_t Data) {
|
|
std::vector<uint32_t> FillData;
|
|
FillData.insert(FillData.begin(), (Size / 4) + 1, Data);
|
|
OS.write(reinterpret_cast<char *>(FillData.data()), Size);
|
|
}
|
|
|
|
void MachOWriter::ZeroToOffset(raw_ostream &OS, size_t Offset) {
|
|
auto currOffset = OS.tell() - fileStart;
|
|
if (currOffset < Offset)
|
|
ZeroFillBytes(OS, Offset - currOffset);
|
|
}
|
|
|
|
Error MachOWriter::writeLoadCommands(raw_ostream &OS) {
|
|
for (auto &LC : Obj.LoadCommands) {
|
|
size_t BytesWritten = 0;
|
|
#define HANDLE_LOAD_COMMAND(LCName, LCValue, LCStruct) \
|
|
case MachO::LCName: \
|
|
OS.write(reinterpret_cast<const char *>(&(LC.Data.LCStruct##_data)), \
|
|
sizeof(MachO::LCStruct)); \
|
|
BytesWritten = sizeof(MachO::LCStruct); \
|
|
BytesWritten += writeLoadCommandData<MachO::LCStruct>(LC, OS); \
|
|
break;
|
|
|
|
switch (LC.Data.load_command_data.cmd) {
|
|
default:
|
|
OS.write(reinterpret_cast<const char *>(&(LC.Data.load_command_data)),
|
|
sizeof(MachO::load_command));
|
|
BytesWritten = sizeof(MachO::load_command);
|
|
BytesWritten += writeLoadCommandData<MachO::load_command>(LC, OS);
|
|
break;
|
|
#include "llvm/Support/MachO.def"
|
|
}
|
|
|
|
if (LC.PayloadBytes.size() > 0) {
|
|
OS.write(reinterpret_cast<const char *>(LC.PayloadBytes.data()),
|
|
LC.PayloadBytes.size());
|
|
BytesWritten += LC.PayloadBytes.size();
|
|
}
|
|
|
|
if (LC.ZeroPadBytes > 0) {
|
|
ZeroFillBytes(OS, LC.ZeroPadBytes);
|
|
BytesWritten += LC.ZeroPadBytes;
|
|
}
|
|
|
|
// Fill remaining bytes with 0. This will only get hit in partially
|
|
// specified test cases.
|
|
auto BytesRemaining = LC.Data.load_command_data.cmdsize - BytesWritten;
|
|
if (BytesRemaining > 0) {
|
|
ZeroFillBytes(OS, BytesRemaining);
|
|
}
|
|
}
|
|
return Error::success();
|
|
}
|
|
|
|
Error MachOWriter::writeSectionData(raw_ostream &OS) {
|
|
for (auto &LC : Obj.LoadCommands) {
|
|
switch (LC.Data.load_command_data.cmd) {
|
|
case MachO::LC_SEGMENT:
|
|
case MachO::LC_SEGMENT_64:
|
|
auto currOffset = OS.tell() - fileStart;
|
|
auto segname = LC.Data.segment_command_data.segname;
|
|
uint64_t segOff = is64Bit ? LC.Data.segment_command_64_data.fileoff
|
|
: LC.Data.segment_command_data.fileoff;
|
|
|
|
if (0 == strncmp(&segname[0], "__LINKEDIT", 16)) {
|
|
if (auto Err = writeLinkEditData(OS))
|
|
return Err;
|
|
} else if (0 == strncmp(&segname[0], "__DWARF", 16)) {
|
|
if (auto Err = writeDWARFData(OS, LC.Sections))
|
|
return Err;
|
|
} else {
|
|
// Zero Fill any data between the end of the last thing we wrote and the
|
|
// start of this section.
|
|
if (currOffset < segOff) {
|
|
ZeroFillBytes(OS, segOff - currOffset);
|
|
}
|
|
|
|
for (auto &Sec : LC.Sections) {
|
|
// Zero Fill any data between the end of the last thing we wrote and
|
|
// the
|
|
// start of this section.
|
|
assert(
|
|
(OS.tell() - fileStart <= Sec.offset ||
|
|
Sec.offset == (uint32_t)0) &&
|
|
"Wrote too much data somewhere, section offsets don't line up.");
|
|
currOffset = OS.tell() - fileStart;
|
|
if (currOffset < Sec.offset) {
|
|
ZeroFillBytes(OS, Sec.offset - currOffset);
|
|
}
|
|
|
|
// Fills section data with 0xDEADBEEF
|
|
Fill(OS, Sec.size, 0xDEADBEEFu);
|
|
}
|
|
}
|
|
uint64_t segSize = is64Bit ? LC.Data.segment_command_64_data.filesize
|
|
: LC.Data.segment_command_data.filesize;
|
|
ZeroToOffset(OS, segOff + segSize);
|
|
break;
|
|
}
|
|
}
|
|
return Error::success();
|
|
}
|
|
|
|
void MachOWriter::writeBindOpcodes(
|
|
raw_ostream &OS, std::vector<MachOYAML::BindOpcode> &BindOpcodes) {
|
|
|
|
for (auto Opcode : BindOpcodes) {
|
|
uint8_t OpByte = Opcode.Opcode | Opcode.Imm;
|
|
OS.write(reinterpret_cast<char *>(&OpByte), 1);
|
|
for (auto Data : Opcode.ULEBExtraData) {
|
|
encodeULEB128(Data, OS);
|
|
}
|
|
for (auto Data : Opcode.SLEBExtraData) {
|
|
encodeSLEB128(Data, OS);
|
|
}
|
|
if (!Opcode.Symbol.empty()) {
|
|
OS.write(Opcode.Symbol.data(), Opcode.Symbol.size());
|
|
OS.write('\0');
|
|
}
|
|
}
|
|
}
|
|
|
|
void MachOWriter::dumpExportEntry(raw_ostream &OS,
|
|
MachOYAML::ExportEntry &Entry) {
|
|
encodeSLEB128(Entry.TerminalSize, OS);
|
|
if (Entry.TerminalSize > 0) {
|
|
encodeSLEB128(Entry.Flags, OS);
|
|
if (Entry.Flags & MachO::EXPORT_SYMBOL_FLAGS_REEXPORT) {
|
|
encodeSLEB128(Entry.Other, OS);
|
|
OS << Entry.ImportName;
|
|
OS.write('\0');
|
|
} else {
|
|
encodeSLEB128(Entry.Address, OS);
|
|
if (Entry.Flags & MachO::EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER)
|
|
encodeSLEB128(Entry.Other, OS);
|
|
}
|
|
}
|
|
OS.write(static_cast<uint8_t>(Entry.Children.size()));
|
|
for (auto EE : Entry.Children) {
|
|
OS << EE.Name;
|
|
OS.write('\0');
|
|
encodeSLEB128(EE.NodeOffset, OS);
|
|
}
|
|
for (auto EE : Entry.Children)
|
|
dumpExportEntry(OS, EE);
|
|
}
|
|
|
|
Error MachOWriter::writeExportTrie(raw_ostream &OS) {
|
|
dumpExportEntry(OS, Obj.LinkEdit.ExportTrie);
|
|
return Error::success();
|
|
}
|
|
|
|
template <typename NListType>
|
|
void writeNListEntry(MachOYAML::NListEntry &NLE, raw_ostream &OS) {
|
|
NListType ListEntry;
|
|
ListEntry.n_strx = NLE.n_strx;
|
|
ListEntry.n_type = NLE.n_type;
|
|
ListEntry.n_sect = NLE.n_sect;
|
|
ListEntry.n_desc = NLE.n_desc;
|
|
ListEntry.n_value = NLE.n_value;
|
|
OS.write(reinterpret_cast<const char *>(&ListEntry), sizeof(NListType));
|
|
}
|
|
|
|
Error MachOWriter::writeLinkEditData(raw_ostream &OS) {
|
|
typedef Error (MachOWriter::*writeHandler)(raw_ostream &);
|
|
typedef std::pair<uint64_t, writeHandler> writeOperation;
|
|
std::vector<writeOperation> WriteQueue;
|
|
|
|
MachO::dyld_info_command *DyldInfoOnlyCmd = 0;
|
|
MachO::symtab_command *SymtabCmd = 0;
|
|
for (auto &LC : Obj.LoadCommands) {
|
|
switch (LC.Data.load_command_data.cmd) {
|
|
case MachO::LC_SYMTAB:
|
|
SymtabCmd = &LC.Data.symtab_command_data;
|
|
WriteQueue.push_back(
|
|
std::make_pair(SymtabCmd->symoff, &MachOWriter::writeNameList));
|
|
WriteQueue.push_back(
|
|
std::make_pair(SymtabCmd->stroff, &MachOWriter::writeStringTable));
|
|
break;
|
|
case MachO::LC_DYLD_INFO_ONLY:
|
|
DyldInfoOnlyCmd = &LC.Data.dyld_info_command_data;
|
|
WriteQueue.push_back(std::make_pair(DyldInfoOnlyCmd->rebase_off,
|
|
&MachOWriter::writeRebaseOpcodes));
|
|
WriteQueue.push_back(std::make_pair(DyldInfoOnlyCmd->bind_off,
|
|
&MachOWriter::writeBasicBindOpcodes));
|
|
WriteQueue.push_back(std::make_pair(DyldInfoOnlyCmd->weak_bind_off,
|
|
&MachOWriter::writeWeakBindOpcodes));
|
|
WriteQueue.push_back(std::make_pair(DyldInfoOnlyCmd->lazy_bind_off,
|
|
&MachOWriter::writeLazyBindOpcodes));
|
|
WriteQueue.push_back(std::make_pair(DyldInfoOnlyCmd->export_off,
|
|
&MachOWriter::writeExportTrie));
|
|
break;
|
|
}
|
|
}
|
|
|
|
std::sort(WriteQueue.begin(), WriteQueue.end(),
|
|
[](const writeOperation &a, const writeOperation &b) {
|
|
return a.first < b.first;
|
|
});
|
|
|
|
for (auto writeOp : WriteQueue) {
|
|
ZeroToOffset(OS, writeOp.first);
|
|
if (auto Err = (this->*writeOp.second)(OS))
|
|
return Err;
|
|
}
|
|
|
|
return Error::success();
|
|
}
|
|
|
|
Error MachOWriter::writeDWARFData(raw_ostream &OS,
|
|
std::vector<MachOYAML::Section> &Sections) {
|
|
for (auto Section : Sections) {
|
|
ZeroToOffset(OS, Section.offset);
|
|
if (0 == strncmp(&Section.sectname[0], "__debug_str", 16)) {
|
|
yaml2debug_str(OS, Obj.DWARF);
|
|
} else if (0 == strncmp(&Section.sectname[0], "__debug_abbrev", 16)) {
|
|
yaml2debug_abbrev(OS, Obj.DWARF);
|
|
} else if (0 == strncmp(&Section.sectname[0], "__debug_aranges", 16)) {
|
|
yaml2debug_aranges(OS, Obj.DWARF);
|
|
} else if (0 == strncmp(&Section.sectname[0], "__debug_pubnames", 16)) {
|
|
yaml2pubsection(OS, Obj.DWARF.PubNames);
|
|
} else if (0 == strncmp(&Section.sectname[0], "__debug_pubtypes", 16)) {
|
|
yaml2pubsection(OS, Obj.DWARF.PubTypes);
|
|
}
|
|
}
|
|
return Error::success();
|
|
}
|
|
|
|
Error MachOWriter::writeRebaseOpcodes(raw_ostream &OS) {
|
|
MachOYAML::LinkEditData &LinkEdit = Obj.LinkEdit;
|
|
|
|
for (auto Opcode : LinkEdit.RebaseOpcodes) {
|
|
uint8_t OpByte = Opcode.Opcode | Opcode.Imm;
|
|
OS.write(reinterpret_cast<char *>(&OpByte), 1);
|
|
for (auto Data : Opcode.ExtraData) {
|
|
encodeULEB128(Data, OS);
|
|
}
|
|
}
|
|
return Error::success();
|
|
}
|
|
|
|
Error MachOWriter::writeBasicBindOpcodes(raw_ostream &OS) {
|
|
writeBindOpcodes(OS, Obj.LinkEdit.BindOpcodes);
|
|
return Error::success();
|
|
}
|
|
|
|
Error MachOWriter::writeWeakBindOpcodes(raw_ostream &OS) {
|
|
writeBindOpcodes(OS, Obj.LinkEdit.WeakBindOpcodes);
|
|
return Error::success();
|
|
}
|
|
|
|
Error MachOWriter::writeLazyBindOpcodes(raw_ostream &OS) {
|
|
writeBindOpcodes(OS, Obj.LinkEdit.LazyBindOpcodes);
|
|
return Error::success();
|
|
}
|
|
|
|
Error MachOWriter::writeNameList(raw_ostream &OS) {
|
|
for (auto NLE : Obj.LinkEdit.NameList) {
|
|
if (is64Bit)
|
|
writeNListEntry<MachO::nlist_64>(NLE, OS);
|
|
else
|
|
writeNListEntry<MachO::nlist>(NLE, OS);
|
|
}
|
|
return Error::success();
|
|
}
|
|
|
|
Error MachOWriter::writeStringTable(raw_ostream &OS) {
|
|
for (auto Str : Obj.LinkEdit.StringTable) {
|
|
OS.write(Str.data(), Str.size());
|
|
OS.write('\0');
|
|
}
|
|
return Error::success();
|
|
}
|
|
|
|
class UniversalWriter {
|
|
public:
|
|
UniversalWriter(yaml::YamlObjectFile &ObjectFile)
|
|
: ObjectFile(ObjectFile), fileStart(0) {}
|
|
|
|
Error writeMachO(raw_ostream &OS);
|
|
|
|
private:
|
|
Error writeFatHeader(raw_ostream &OS);
|
|
Error writeFatArchs(raw_ostream &OS);
|
|
|
|
void ZeroToOffset(raw_ostream &OS, size_t offset);
|
|
|
|
yaml::YamlObjectFile &ObjectFile;
|
|
uint64_t fileStart;
|
|
};
|
|
|
|
Error UniversalWriter::writeMachO(raw_ostream &OS) {
|
|
fileStart = OS.tell();
|
|
if (ObjectFile.MachO) {
|
|
MachOWriter Writer(*ObjectFile.MachO);
|
|
return Writer.writeMachO(OS);
|
|
}
|
|
if (auto Err = writeFatHeader(OS))
|
|
return Err;
|
|
if (auto Err = writeFatArchs(OS))
|
|
return Err;
|
|
auto &FatFile = *ObjectFile.FatMachO;
|
|
assert(FatFile.FatArchs.size() == FatFile.Slices.size());
|
|
for (size_t i = 0; i < FatFile.Slices.size(); i++) {
|
|
ZeroToOffset(OS, FatFile.FatArchs[i].offset);
|
|
MachOWriter Writer(FatFile.Slices[i]);
|
|
if (auto Err = Writer.writeMachO(OS))
|
|
return Err;
|
|
auto SliceEnd = FatFile.FatArchs[i].offset + FatFile.FatArchs[i].size;
|
|
ZeroToOffset(OS, SliceEnd);
|
|
}
|
|
return Error::success();
|
|
}
|
|
|
|
Error UniversalWriter::writeFatHeader(raw_ostream &OS) {
|
|
auto &FatFile = *ObjectFile.FatMachO;
|
|
MachO::fat_header header;
|
|
header.magic = FatFile.Header.magic;
|
|
header.nfat_arch = FatFile.Header.nfat_arch;
|
|
if (sys::IsLittleEndianHost)
|
|
swapStruct(header);
|
|
OS.write(reinterpret_cast<const char *>(&header), sizeof(MachO::fat_header));
|
|
return Error::success();
|
|
}
|
|
|
|
template <typename FatArchType>
|
|
FatArchType constructFatArch(MachOYAML::FatArch &Arch) {
|
|
FatArchType FatArch;
|
|
FatArch.cputype = Arch.cputype;
|
|
FatArch.cpusubtype = Arch.cpusubtype;
|
|
FatArch.offset = Arch.offset;
|
|
FatArch.size = Arch.size;
|
|
FatArch.align = Arch.align;
|
|
return FatArch;
|
|
}
|
|
|
|
template <typename StructType>
|
|
void writeFatArch(MachOYAML::FatArch &LC, raw_ostream &OS) {}
|
|
|
|
template <>
|
|
void writeFatArch<MachO::fat_arch>(MachOYAML::FatArch &Arch, raw_ostream &OS) {
|
|
auto FatArch = constructFatArch<MachO::fat_arch>(Arch);
|
|
if (sys::IsLittleEndianHost)
|
|
swapStruct(FatArch);
|
|
OS.write(reinterpret_cast<const char *>(&FatArch), sizeof(MachO::fat_arch));
|
|
}
|
|
|
|
template <>
|
|
void writeFatArch<MachO::fat_arch_64>(MachOYAML::FatArch &Arch,
|
|
raw_ostream &OS) {
|
|
auto FatArch = constructFatArch<MachO::fat_arch_64>(Arch);
|
|
FatArch.reserved = Arch.reserved;
|
|
if (sys::IsLittleEndianHost)
|
|
swapStruct(FatArch);
|
|
OS.write(reinterpret_cast<const char *>(&FatArch),
|
|
sizeof(MachO::fat_arch_64));
|
|
}
|
|
|
|
Error UniversalWriter::writeFatArchs(raw_ostream &OS) {
|
|
auto &FatFile = *ObjectFile.FatMachO;
|
|
bool is64Bit = FatFile.Header.magic == MachO::FAT_MAGIC_64;
|
|
for (auto Arch : FatFile.FatArchs) {
|
|
if (is64Bit)
|
|
writeFatArch<MachO::fat_arch_64>(Arch, OS);
|
|
else
|
|
writeFatArch<MachO::fat_arch>(Arch, OS);
|
|
}
|
|
|
|
return Error::success();
|
|
}
|
|
|
|
void UniversalWriter::ZeroToOffset(raw_ostream &OS, size_t Offset) {
|
|
auto currOffset = OS.tell() - fileStart;
|
|
if (currOffset < Offset)
|
|
ZeroFillBytes(OS, Offset - currOffset);
|
|
}
|
|
|
|
} // end anonymous namespace
|
|
|
|
int yaml2macho(yaml::YamlObjectFile &Doc, raw_ostream &Out) {
|
|
UniversalWriter Writer(Doc);
|
|
if (auto Err = Writer.writeMachO(Out)) {
|
|
errs() << toString(std::move(Err));
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|