lib/ObjectYAML/MachOYAML.cpp

//===- MachOYAML.cpp - MachO YAMLIO implementation ------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines classes for handling the YAML representation of MachO.
//
//===----------------------------------------------------------------------===//

#include "llvm/ObjectYAML/MachOYAML.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/BinaryFormat/MachO.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/YAMLTraits.h"
#include "llvm/Support/raw_ostream.h"
#include <cinttypes>
#include <cstdint>
#include <cstring>

namespace llvm {

MachOYAML::LoadCommand::~LoadCommand() = default;

bool MachOYAML::LinkEditData::isEmpty() const {
  return 0 == RebaseOpcodes.size() + BindOpcodes.size() +
                  WeakBindOpcodes.size() + LazyBindOpcodes.size() +
                  ExportTrie.Children.size() + NameList.size() +
                  StringTable.size() + FunctionStarts.size();
}

namespace yaml {

void ScalarTraits<char_16>::output(const char_16 &Val, void *,
                                   raw_ostream &Out) {
  auto Len = strnlen(&Val[0], 16);
  Out << StringRef(&Val[0], Len);
}

StringRef ScalarTraits<char_16>::input(StringRef Scalar, void *, char_16 &Val) {
  size_t CopySize = 16 >= Scalar.size() ? 16 : Scalar.size();
  memcpy((void *)Val, Scalar.data(), CopySize);

  if (Scalar.size() < 16) {
    memset((void *)&Val[Scalar.size()], 0, 16 - Scalar.size());
  }

  return StringRef();
}

QuotingType ScalarTraits<char_16>::mustQuote(StringRef S) {
  return needsQuotes(S);
}

void ScalarTraits<uuid_t>::output(const uuid_t &Val, void *, raw_ostream &Out) {
  Out.write_uuid(Val);
}

StringRef ScalarTraits<uuid_t>::input(StringRef Scalar, void *, uuid_t &Val) {
  size_t OutIdx = 0;
  for (size_t Idx = 0; Idx < Scalar.size(); ++Idx) {
    if (Scalar[Idx] == '-' || OutIdx >= 16)
      continue;
    unsigned long long TempInt;
    if (getAsUnsignedInteger(Scalar.slice(Idx, Idx + 2), 16, TempInt))
      return "invalid number";
    if (TempInt > 0xFF)
      return "out of range number";
    Val[OutIdx] = static_cast<uint8_t>(TempInt);
    ++Idx; // increment idx an extra time because we're consuming 2 chars
    ++OutIdx;
  }
  return StringRef();
}

QuotingType ScalarTraits<uuid_t>::mustQuote(StringRef S) {
  return needsQuotes(S);
}

void MappingTraits<MachOYAML::FileHeader>::mapping(
    IO &IO, MachOYAML::FileHeader &FileHdr) {
  IO.mapRequired("magic", FileHdr.magic);
  IO.mapRequired("cputype", FileHdr.cputype);
  IO.mapRequired("cpusubtype", FileHdr.cpusubtype);
  IO.mapRequired("filetype", FileHdr.filetype);
  IO.mapRequired("ncmds", FileHdr.ncmds);
  IO.mapRequired("sizeofcmds", FileHdr.sizeofcmds);
  IO.mapRequired("flags", FileHdr.flags);
  if (FileHdr.magic == MachO::MH_MAGIC_64 ||
      FileHdr.magic == MachO::MH_CIGAM_64)
    IO.mapRequired("reserved", FileHdr.reserved);
}

void MappingTraits<MachOYAML::Object>::mapping(IO &IO,
                                               MachOYAML::Object &Object) {
  // If the context isn't already set, tag the document as !mach-o.
  // For Fat files there will be a different tag so they can be differentiated.
  if (!IO.getContext()) {
    IO.setContext(&Object);
  }
  IO.mapTag("!mach-o", true);
  IO.mapOptional("IsLittleEndian", Object.IsLittleEndian,
                 sys::IsLittleEndianHost);
  Object.DWARF.IsLittleEndian = Object.IsLittleEndian;

  IO.mapRequired("FileHeader", Object.Header);
  Object.DWARF.Is64BitAddrSize = Object.Header.magic == MachO::MH_MAGIC_64 ||
                                 Object.Header.magic == MachO::MH_CIGAM_64;
  IO.mapOptional("LoadCommands", Object.LoadCommands);

  if (Object.RawLinkEditSegment || !IO.outputting())
    IO.mapOptional("__LINKEDIT", Object.RawLinkEditSegment);
  if(!Object.LinkEdit.isEmpty() || !IO.outputting())
    IO.mapOptional("LinkEditData", Object.LinkEdit);

  if(!Object.DWARF.isEmpty() || !IO.outputting())
    IO.mapOptional("DWARF", Object.DWARF);

  if (IO.getContext() == &Object)
    IO.setContext(nullptr);
}

void MappingTraits<MachOYAML::FatHeader>::mapping(
    IO &IO, MachOYAML::FatHeader &FatHeader) {
  IO.mapRequired("magic", FatHeader.magic);
  IO.mapRequired("nfat_arch", FatHeader.nfat_arch);
}

void MappingTraits<MachOYAML::FatArch>::mapping(IO &IO,
                                                MachOYAML::FatArch &FatArch) {
  IO.mapRequired("cputype", FatArch.cputype);
  IO.mapRequired("cpusubtype", FatArch.cpusubtype);
  IO.mapRequired("offset", FatArch.offset);
  IO.mapRequired("size", FatArch.size);
  IO.mapRequired("align", FatArch.align);
  IO.mapOptional("reserved", FatArch.reserved,
                 static_cast<llvm::yaml::Hex32>(0));
}

void MappingTraits<MachOYAML::UniversalBinary>::mapping(
    IO &IO, MachOYAML::UniversalBinary &UniversalBinary) {
  if (!IO.getContext()) {
    IO.setContext(&UniversalBinary);
    IO.mapTag("!fat-mach-o", true);
  }
  IO.mapRequired("FatHeader", UniversalBinary.Header);
  IO.mapRequired("FatArchs", UniversalBinary.FatArchs);
  IO.mapRequired("Slices", UniversalBinary.Slices);

  if (IO.getContext() == &UniversalBinary)
    IO.setContext(nullptr);
}

void MappingTraits<MachOYAML::LinkEditData>::mapping(
    IO &IO, MachOYAML::LinkEditData &LinkEditData) {
  IO.mapOptional("RebaseOpcodes", LinkEditData.RebaseOpcodes);
  IO.mapOptional("BindOpcodes", LinkEditData.BindOpcodes);
  IO.mapOptional("WeakBindOpcodes", LinkEditData.WeakBindOpcodes);
  IO.mapOptional("LazyBindOpcodes", LinkEditData.LazyBindOpcodes);
  if (!LinkEditData.ExportTrie.Children.empty() || !IO.outputting())
    IO.mapOptional("ExportTrie", LinkEditData.ExportTrie);
  IO.mapOptional("NameList", LinkEditData.NameList);
  IO.mapOptional("StringTable", LinkEditData.StringTable);
  IO.mapOptional("IndirectSymbols", LinkEditData.IndirectSymbols);
  IO.mapOptional("FunctionStarts", LinkEditData.FunctionStarts);
}

void MappingTraits<MachOYAML::RebaseOpcode>::mapping(
    IO &IO, MachOYAML::RebaseOpcode &RebaseOpcode) {
  IO.mapRequired("Opcode", RebaseOpcode.Opcode);
  IO.mapRequired("Imm", RebaseOpcode.Imm);
  IO.mapOptional("ExtraData", RebaseOpcode.ExtraData);
}

void MappingTraits<MachOYAML::BindOpcode>::mapping(
    IO &IO, MachOYAML::BindOpcode &BindOpcode) {
  IO.mapRequired("Opcode", BindOpcode.Opcode);
  IO.mapRequired("Imm", BindOpcode.Imm);
  IO.mapOptional("ULEBExtraData", BindOpcode.ULEBExtraData);
  IO.mapOptional("SLEBExtraData", BindOpcode.SLEBExtraData);
  IO.mapOptional("Symbol", BindOpcode.Symbol);
}

void MappingTraits<MachOYAML::ExportEntry>::mapping(
    IO &IO, MachOYAML::ExportEntry &ExportEntry) {
  IO.mapRequired("TerminalSize", ExportEntry.TerminalSize);
  IO.mapOptional("NodeOffset", ExportEntry.NodeOffset);
  IO.mapOptional("Name", ExportEntry.Name);
  IO.mapOptional("Flags", ExportEntry.Flags);
  IO.mapOptional("Address", ExportEntry.Address);
  IO.mapOptional("Other", ExportEntry.Other);
  IO.mapOptional("ImportName", ExportEntry.ImportName);
  IO.mapOptional("Children", ExportEntry.Children);
}

void MappingTraits<MachOYAML::NListEntry>::mapping(
    IO &IO, MachOYAML::NListEntry &NListEntry) {
  IO.mapRequired("n_strx", NListEntry.n_strx);
  IO.mapRequired("n_type", NListEntry.n_type);
  IO.mapRequired("n_sect", NListEntry.n_sect);
  IO.mapRequired("n_desc", NListEntry.n_desc);
  IO.mapRequired("n_value", NListEntry.n_value);
}

template <typename StructType>
void mapLoadCommandData(IO &IO, MachOYAML::LoadCommand &LoadCommand) {}

template <>
void mapLoadCommandData<MachO::segment_command>(
    IO &IO, MachOYAML::LoadCommand &LoadCommand) {
  IO.mapOptional("Sections", LoadCommand.Sections);
}

template <>
void mapLoadCommandData<MachO::segment_command_64>(
    IO &IO, MachOYAML::LoadCommand &LoadCommand) {
  IO.mapOptional("Sections", LoadCommand.Sections);
}

template <>
void mapLoadCommandData<MachO::dylib_command>(
    IO &IO, MachOYAML::LoadCommand &LoadCommand) {
  IO.mapOptional("Content", LoadCommand.Content);
}

template <>
void mapLoadCommandData<MachO::rpath_command>(
    IO &IO, MachOYAML::LoadCommand &LoadCommand) {
  IO.mapOptional("Content", LoadCommand.Content);
}

template <>
void mapLoadCommandData<MachO::dylinker_command>(
    IO &IO, MachOYAML::LoadCommand &LoadCommand) {
  IO.mapOptional("Content", LoadCommand.Content);
}

template <>
void mapLoadCommandData<MachO::sub_framework_command>(
    IO &IO, MachOYAML::LoadCommand &LoadCommand) {
  IO.mapOptional("Content", LoadCommand.Content);
}

template <>
void mapLoadCommandData<MachO::sub_umbrella_command>(
    IO &IO, MachOYAML::LoadCommand &LoadCommand) {
  IO.mapOptional("Content", LoadCommand.Content);
}

template <>
void mapLoadCommandData<MachO::sub_client_command>(
    IO &IO, MachOYAML::LoadCommand &LoadCommand) {
  IO.mapOptional("Content", LoadCommand.Content);
}

template <>
void mapLoadCommandData<MachO::sub_library_command>(
    IO &IO, MachOYAML::LoadCommand &LoadCommand) {
  IO.mapOptional("Content", LoadCommand.Content);
}

template <>
void mapLoadCommandData<MachO::build_version_command>(
    IO &IO, MachOYAML::LoadCommand &LoadCommand) {
  IO.mapOptional("Tools", LoadCommand.Tools);
}

void MappingTraits<MachOYAML::LoadCommand>::mapping(
    IO &IO, MachOYAML::LoadCommand &LoadCommand) {
  MachO::LoadCommandType TempCmd = static_cast<MachO::LoadCommandType>(
      LoadCommand.Data.load_command_data.cmd);
  IO.mapRequired("cmd", TempCmd);
  LoadCommand.Data.load_command_data.cmd = TempCmd;
  IO.mapRequired("cmdsize", LoadCommand.Data.load_command_data.cmdsize);

#define HANDLE_LOAD_COMMAND(LCName, LCValue, LCStruct)                         \
  case MachO::LCName:                                                          \
    MappingTraits<MachO::LCStruct>::mapping(IO,                                \
                                            LoadCommand.Data.LCStruct##_data); \
    mapLoadCommandData<MachO::LCStruct>(IO, LoadCommand);                      \
    break;

  switch (LoadCommand.Data.load_command_data.cmd) {
#include "llvm/BinaryFormat/MachO.def"
  }
  IO.mapOptional("PayloadBytes", LoadCommand.PayloadBytes);
  IO.mapOptional("ZeroPadBytes", LoadCommand.ZeroPadBytes, (uint64_t)0ull);
}

void MappingTraits<MachO::dyld_info_command>::mapping(
    IO &IO, MachO::dyld_info_command &LoadCommand) {
  IO.mapRequired("rebase_off", LoadCommand.rebase_off);
  IO.mapRequired("rebase_size", LoadCommand.rebase_size);
  IO.mapRequired("bind_off", LoadCommand.bind_off);
  IO.mapRequired("bind_size", LoadCommand.bind_size);
  IO.mapRequired("weak_bind_off", LoadCommand.weak_bind_off);
  IO.mapRequired("weak_bind_size", LoadCommand.weak_bind_size);
  IO.mapRequired("lazy_bind_off", LoadCommand.lazy_bind_off);
  IO.mapRequired("lazy_bind_size", LoadCommand.lazy_bind_size);
  IO.mapRequired("export_off", LoadCommand.export_off);
  IO.mapRequired("export_size", LoadCommand.export_size);
}

void MappingTraits<MachOYAML::Relocation>::mapping(
    IO &IO, MachOYAML::Relocation &Relocation) {
  IO.mapRequired("address", Relocation.address);
  IO.mapRequired("symbolnum", Relocation.symbolnum);
  IO.mapRequired("pcrel", Relocation.is_pcrel);
  IO.mapRequired("length", Relocation.length);
  IO.mapRequired("extern", Relocation.is_extern);
  IO.mapRequired("type", Relocation.type);
  IO.mapRequired("scattered", Relocation.is_scattered);
  IO.mapRequired("value", Relocation.value);
}

void MappingTraits<MachOYAML::Section>::mapping(IO &IO,
                                                MachOYAML::Section &Section) {
  IO.mapRequired("sectname", Section.sectname);
  IO.mapRequired("segname", Section.segname);
  IO.mapRequired("addr", Section.addr);
  IO.mapRequired("size", Section.size);
  IO.mapRequired("offset", Section.offset);
  IO.mapRequired("align", Section.align);
  IO.mapRequired("reloff", Section.reloff);
  IO.mapRequired("nreloc", Section.nreloc);
  IO.mapRequired("flags", Section.flags);
  IO.mapRequired("reserved1", Section.reserved1);
  IO.mapRequired("reserved2", Section.reserved2);
  IO.mapOptional("reserved3", Section.reserved3);
  IO.mapOptional("content", Section.content);
  IO.mapOptional("relocations", Section.relocations);
}

std::string
MappingTraits<MachOYAML::Section>::validate(IO &IO,
                                            MachOYAML::Section &Section) {
  if (Section.content && Section.size < Section.content->binary_size())
    return "Section size must be greater than or equal to the content size";
  return "";
}

void MappingTraits<MachO::build_tool_version>::mapping(
    IO &IO, MachO::build_tool_version &tool) {
  IO.mapRequired("tool", tool.tool);
  IO.mapRequired("version", tool.version);
}

void MappingTraits<MachO::dylib>::mapping(IO &IO, MachO::dylib &DylibStruct) {
  IO.mapRequired("name", DylibStruct.name);
  IO.mapRequired("timestamp", DylibStruct.timestamp);
  IO.mapRequired("current_version", DylibStruct.current_version);
  IO.mapRequired("compatibility_version", DylibStruct.compatibility_version);
}

void MappingTraits<MachO::dylib_command>::mapping(
    IO &IO, MachO::dylib_command &LoadCommand) {
  IO.mapRequired("dylib", LoadCommand.dylib);
}

void MappingTraits<MachO::dylinker_command>::mapping(
    IO &IO, MachO::dylinker_command &LoadCommand) {
  IO.mapRequired("name", LoadCommand.name);
}

void MappingTraits<MachO::dysymtab_command>::mapping(
    IO &IO, MachO::dysymtab_command &LoadCommand) {
  IO.mapRequired("ilocalsym", LoadCommand.ilocalsym);
  IO.mapRequired("nlocalsym", LoadCommand.nlocalsym);
  IO.mapRequired("iextdefsym", LoadCommand.iextdefsym);
  IO.mapRequired("nextdefsym", LoadCommand.nextdefsym);
  IO.mapRequired("iundefsym", LoadCommand.iundefsym);
  IO.mapRequired("nundefsym", LoadCommand.nundefsym);
  IO.mapRequired("tocoff", LoadCommand.tocoff);
  IO.mapRequired("ntoc", LoadCommand.ntoc);
  IO.mapRequired("modtaboff", LoadCommand.modtaboff);
  IO.mapRequired("nmodtab", LoadCommand.nmodtab);
  IO.mapRequired("extrefsymoff", LoadCommand.extrefsymoff);
  IO.mapRequired("nextrefsyms", LoadCommand.nextrefsyms);
  IO.mapRequired("indirectsymoff", LoadCommand.indirectsymoff);
  IO.mapRequired("nindirectsyms", LoadCommand.nindirectsyms);
  IO.mapRequired("extreloff", LoadCommand.extreloff);
  IO.mapRequired("nextrel", LoadCommand.nextrel);
  IO.mapRequired("locreloff", LoadCommand.locreloff);
  IO.mapRequired("nlocrel", LoadCommand.nlocrel);
}

void MappingTraits<MachO::encryption_info_command>::mapping(
    IO &IO, MachO::encryption_info_command &LoadCommand) {
  IO.mapRequired("cryptoff", LoadCommand.cryptoff);
  IO.mapRequired("cryptsize", LoadCommand.cryptsize);
  IO.mapRequired("cryptid", LoadCommand.cryptid);
}

void MappingTraits<MachO::encryption_info_command_64>::mapping(
    IO &IO, MachO::encryption_info_command_64 &LoadCommand) {
  IO.mapRequired("cryptoff", LoadCommand.cryptoff);
  IO.mapRequired("cryptsize", LoadCommand.cryptsize);
  IO.mapRequired("cryptid", LoadCommand.cryptid);
  IO.mapRequired("pad", LoadCommand.pad);
}

void MappingTraits<MachO::entry_point_command>::mapping(
    IO &IO, MachO::entry_point_command &LoadCommand) {
  IO.mapRequired("entryoff", LoadCommand.entryoff);
  IO.mapRequired("stacksize", LoadCommand.stacksize);
}

void MappingTraits<MachO::fvmfile_command>::mapping(
    IO &IO, MachO::fvmfile_command &LoadCommand) {
  IO.mapRequired("name", LoadCommand.name);
  IO.mapRequired("header_addr", LoadCommand.header_addr);
}

void MappingTraits<MachO::fvmlib>::mapping(IO &IO, MachO::fvmlib &FVMLib) {
  IO.mapRequired("name", FVMLib.name);
  IO.mapRequired("minor_version", FVMLib.minor_version);
  IO.mapRequired("header_addr", FVMLib.header_addr);
}

void MappingTraits<MachO::fvmlib_command>::mapping(
    IO &IO, MachO::fvmlib_command &LoadCommand) {
  IO.mapRequired("fvmlib", LoadCommand.fvmlib);
}

void MappingTraits<MachO::ident_command>::mapping(
    IO &IO, MachO::ident_command &LoadCommand) {}

void MappingTraits<MachO::linkedit_data_command>::mapping(
    IO &IO, MachO::linkedit_data_command &LoadCommand) {
  IO.mapRequired("dataoff", LoadCommand.dataoff);
  IO.mapRequired("datasize", LoadCommand.datasize);
}

void MappingTraits<MachO::linker_option_command>::mapping(
    IO &IO, MachO::linker_option_command &LoadCommand) {
  IO.mapRequired("count", LoadCommand.count);
}

void MappingTraits<MachO::prebind_cksum_command>::mapping(
    IO &IO, MachO::prebind_cksum_command &LoadCommand) {
  IO.mapRequired("cksum", LoadCommand.cksum);
}

void MappingTraits<MachO::load_command>::mapping(
    IO &IO, MachO::load_command &LoadCommand) {}

void MappingTraits<MachO::prebound_dylib_command>::mapping(
    IO &IO, MachO::prebound_dylib_command &LoadCommand) {
  IO.mapRequired("name", LoadCommand.name);
  IO.mapRequired("nmodules", LoadCommand.nmodules);
  IO.mapRequired("linked_modules", LoadCommand.linked_modules);
}

void MappingTraits<MachO::routines_command>::mapping(
    IO &IO, MachO::routines_command &LoadCommand) {
  IO.mapRequired("init_address", LoadCommand.init_address);
  IO.mapRequired("init_module", LoadCommand.init_module);
  IO.mapRequired("reserved1", LoadCommand.reserved1);
  IO.mapRequired("reserved2", LoadCommand.reserved2);
  IO.mapRequired("reserved3", LoadCommand.reserved3);
  IO.mapRequired("reserved4", LoadCommand.reserved4);
  IO.mapRequired("reserved5", LoadCommand.reserved5);
  IO.mapRequired("reserved6", LoadCommand.reserved6);
}

void MappingTraits<MachO::routines_command_64>::mapping(
    IO &IO, MachO::routines_command_64 &LoadCommand) {
  IO.mapRequired("init_address", LoadCommand.init_address);
  IO.mapRequired("init_module", LoadCommand.init_module);
  IO.mapRequired("reserved1", LoadCommand.reserved1);
  IO.mapRequired("reserved2", LoadCommand.reserved2);
  IO.mapRequired("reserved3", LoadCommand.reserved3);
  IO.mapRequired("reserved4", LoadCommand.reserved4);
  IO.mapRequired("reserved5", LoadCommand.reserved5);
  IO.mapRequired("reserved6", LoadCommand.reserved6);
}

void MappingTraits<MachO::rpath_command>::mapping(
    IO &IO, MachO::rpath_command &LoadCommand) {
  IO.mapRequired("path", LoadCommand.path);
}

void MappingTraits<MachO::section>::mapping(IO &IO, MachO::section &Section) {
  IO.mapRequired("sectname", Section.sectname);
  IO.mapRequired("segname", Section.segname);
  IO.mapRequired("addr", Section.addr);
  IO.mapRequired("size", Section.size);
  IO.mapRequired("offset", Section.offset);
  IO.mapRequired("align", Section.align);
  IO.mapRequired("reloff", Section.reloff);
  IO.mapRequired("nreloc", Section.nreloc);
  IO.mapRequired("flags", Section.flags);
  IO.mapRequired("reserved1", Section.reserved1);
  IO.mapRequired("reserved2", Section.reserved2);
}

void MappingTraits<MachO::section_64>::mapping(IO &IO,
                                               MachO::section_64 &Section) {
  IO.mapRequired("sectname", Section.sectname);
  IO.mapRequired("segname", Section.segname);
  IO.mapRequired("addr", Section.addr);
  IO.mapRequired("size", Section.size);
  IO.mapRequired("offset", Section.offset);
  IO.mapRequired("align", Section.align);
  IO.mapRequired("reloff", Section.reloff);
  IO.mapRequired("nreloc", Section.nreloc);
  IO.mapRequired("flags", Section.flags);
  IO.mapRequired("reserved1", Section.reserved1);
  IO.mapRequired("reserved2", Section.reserved2);
  IO.mapRequired("reserved3", Section.reserved3);
}

void MappingTraits<MachO::segment_command>::mapping(
    IO &IO, MachO::segment_command &LoadCommand) {
  IO.mapRequired("segname", LoadCommand.segname);
  IO.mapRequired("vmaddr", LoadCommand.vmaddr);
  IO.mapRequired("vmsize", LoadCommand.vmsize);
  IO.mapRequired("fileoff", LoadCommand.fileoff);
  IO.mapRequired("filesize", LoadCommand.filesize);
  IO.mapRequired("maxprot", LoadCommand.maxprot);
  IO.mapRequired("initprot", LoadCommand.initprot);
  IO.mapRequired("nsects", LoadCommand.nsects);
  IO.mapRequired("flags", LoadCommand.flags);
}

void MappingTraits<MachO::segment_command_64>::mapping(
    IO &IO, MachO::segment_command_64 &LoadCommand) {
  IO.mapRequired("segname", LoadCommand.segname);
  IO.mapRequired("vmaddr", LoadCommand.vmaddr);
  IO.mapRequired("vmsize", LoadCommand.vmsize);
  IO.mapRequired("fileoff", LoadCommand.fileoff);
  IO.mapRequired("filesize", LoadCommand.filesize);
  IO.mapRequired("maxprot", LoadCommand.maxprot);
  IO.mapRequired("initprot", LoadCommand.initprot);
  IO.mapRequired("nsects", LoadCommand.nsects);
  IO.mapRequired("flags", LoadCommand.flags);
}

void MappingTraits<MachO::source_version_command>::mapping(
    IO &IO, MachO::source_version_command &LoadCommand) {
  IO.mapRequired("version", LoadCommand.version);
}

void MappingTraits<MachO::sub_client_command>::mapping(
    IO &IO, MachO::sub_client_command &LoadCommand) {
  IO.mapRequired("client", LoadCommand.client);
}

void MappingTraits<MachO::sub_framework_command>::mapping(
    IO &IO, MachO::sub_framework_command &LoadCommand) {
  IO.mapRequired("umbrella", LoadCommand.umbrella);
}

void MappingTraits<MachO::sub_library_command>::mapping(
    IO &IO, MachO::sub_library_command &LoadCommand) {
  IO.mapRequired("sub_library", LoadCommand.sub_library);
}

void MappingTraits<MachO::sub_umbrella_command>::mapping(
    IO &IO, MachO::sub_umbrella_command &LoadCommand) {
  IO.mapRequired("sub_umbrella", LoadCommand.sub_umbrella);
}

void MappingTraits<MachO::symseg_command>::mapping(
    IO &IO, MachO::symseg_command &LoadCommand) {
  IO.mapRequired("offset", LoadCommand.offset);
  IO.mapRequired("size", LoadCommand.size);
}

void MappingTraits<MachO::symtab_command>::mapping(
    IO &IO, MachO::symtab_command &LoadCommand) {
  IO.mapRequired("symoff", LoadCommand.symoff);
  IO.mapRequired("nsyms", LoadCommand.nsyms);
  IO.mapRequired("stroff", LoadCommand.stroff);
  IO.mapRequired("strsize", LoadCommand.strsize);
}

void MappingTraits<MachO::thread_command>::mapping(
    IO &IO, MachO::thread_command &LoadCommand) {}

void MappingTraits<MachO::twolevel_hints_command>::mapping(
    IO &IO, MachO::twolevel_hints_command &LoadCommand) {
  IO.mapRequired("offset", LoadCommand.offset);
  IO.mapRequired("nhints", LoadCommand.nhints);
}

void MappingTraits<MachO::uuid_command>::mapping(
    IO &IO, MachO::uuid_command &LoadCommand) {
  IO.mapRequired("uuid", LoadCommand.uuid);
}

void MappingTraits<MachO::version_min_command>::mapping(
    IO &IO, MachO::version_min_command &LoadCommand) {
  IO.mapRequired("version", LoadCommand.version);
  IO.mapRequired("sdk", LoadCommand.sdk);
}

void MappingTraits<MachO::note_command>::mapping(
    IO &IO, MachO::note_command &LoadCommand) {
  IO.mapRequired("data_owner", LoadCommand.data_owner);
  IO.mapRequired("offset", LoadCommand.offset);
  IO.mapRequired("size", LoadCommand.size);
}

void MappingTraits<MachO::build_version_command>::mapping(
    IO &IO, MachO::build_version_command &LoadCommand) {
  IO.mapRequired("platform", LoadCommand.platform);
  IO.mapRequired("minos", LoadCommand.minos);
  IO.mapRequired("sdk", LoadCommand.sdk);
  IO.mapRequired("ntools", LoadCommand.ntools);
}

} // end namespace yaml

} // end namespace llvm