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//===------ macho2yaml.cpp - obj2yaml conversion tool -----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "Error.h"
#include "obj2yaml.h"
#include "llvm/Object/MachOUniversal.h"
#include "llvm/ObjectYAML/MachOYAML.h"
#include "llvm/Support/ErrorHandling.h"
#include <string.h> // for memcpy
using namespace llvm;
class MachODumper {
const object::MachOObjectFile &Obj;
public:
MachODumper(const object::MachOObjectFile &O) : Obj(O) {}
Expected<std::unique_ptr<MachOYAML::Object>> dump();
};
#define HANDLE_LOAD_COMMAND(LCName, LCValue, LCStruct) \
case MachO::LCName: \
memcpy((void *) & (LC.Data.LCStruct##_data), LoadCmd.Ptr, \
sizeof(MachO::LCStruct)); \
if (Obj.isLittleEndian() != sys::IsLittleEndianHost) \
MachO::swapStruct(LC.Data.LCStruct##_data); \
break;
template <typename SectionType>
MachOYAML::Section constructSection(SectionType Sec) {
MachOYAML::Section 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;
TempSec.reserved3 = 0;
return TempSec;
}
Expected<std::unique_ptr<MachOYAML::Object>> MachODumper::dump() {
auto Y = make_unique<MachOYAML::Object>();
Y->Header.magic = Obj.getHeader().magic;
Y->Header.cputype = Obj.getHeader().cputype;
Y->Header.cpusubtype = Obj.getHeader().cpusubtype;
Y->Header.filetype = Obj.getHeader().filetype;
Y->Header.ncmds = Obj.getHeader().ncmds;
Y->Header.sizeofcmds = Obj.getHeader().sizeofcmds;
Y->Header.flags = Obj.getHeader().flags;
Y->Header.reserved = 0;
for (auto LoadCmd : Obj.load_commands()) {
MachOYAML::LoadCommand LC;
switch (LoadCmd.C.cmd) {
default:
memcpy((void *)&(LC.Data.load_command_data), LoadCmd.Ptr,
sizeof(MachO::load_command));
if (Obj.isLittleEndian() != sys::IsLittleEndianHost)
MachO::swapStruct(LC.Data.load_command_data);
break;
#include "llvm/Support/MachO.def"
}
if (LoadCmd.C.cmd == MachO::LC_SEGMENT) {
auto End = LoadCmd.Ptr + LoadCmd.C.cmdsize;
const MachO::section *Curr = reinterpret_cast<const MachO::section *>(
LoadCmd.Ptr + sizeof(MachO::segment_command));
for (; reinterpret_cast<const void *>(Curr) < End; Curr++) {
if (Obj.isLittleEndian() != sys::IsLittleEndianHost) {
MachO::section Sec;
memcpy((void *)&Sec, Curr, sizeof(MachO::section));
MachO::swapStruct(Sec);
LC.Sections.push_back(constructSection(Sec));
} else {
LC.Sections.push_back(constructSection(*Curr));
}
}
} else if (LoadCmd.C.cmd == MachO::LC_SEGMENT_64) {
auto End = LoadCmd.Ptr + LoadCmd.C.cmdsize;
const MachO::section_64 *Curr =
reinterpret_cast<const MachO::section_64 *>(
LoadCmd.Ptr + sizeof(MachO::segment_command_64));
for (; reinterpret_cast<const void *>(Curr) < End; Curr++) {
MachOYAML::Section TempSec;
if (Obj.isLittleEndian() != sys::IsLittleEndianHost) {
MachO::section_64 Sec;
memcpy((void *)&Sec, Curr, sizeof(MachO::section_64));
MachO::swapStruct(Sec);
LC.Sections.push_back(constructSection(Sec));
TempSec = constructSection(Sec);
} else {
TempSec = constructSection(*Curr);
}
TempSec.reserved3 = Curr->reserved3;
LC.Sections.push_back(TempSec);
}
}
Y->LoadCommands.push_back(std::move(LC));
}
return std::move(Y);
}
Error macho2yaml(raw_ostream &Out, const object::MachOObjectFile &Obj) {
MachODumper Dumper(Obj);
Expected<std::unique_ptr<MachOYAML::Object>> YAML = Dumper.dump();
if (!YAML)
return YAML.takeError();
yaml::Output Yout(Out);
Yout << *(YAML.get());
return Error::success();
}
Error macho2yaml(raw_ostream &Out, const object::MachOUniversalBinary &Obj) {
return make_error<Obj2YamlError>(obj2yaml_error::not_implemented);
}
std::error_code macho2yaml(raw_ostream &Out, const object::ObjectFile &Obj) {
if (const auto *MachOObj = dyn_cast<object::MachOUniversalBinary>(&Obj)) {
if (auto Err = macho2yaml(Out, *MachOObj)) {
return errorToErrorCode(std::move(Err));
}
return obj2yaml_error::success;
}
if (const auto *MachOObj = dyn_cast<object::MachOObjectFile>(&Obj)) {
if (auto Err = macho2yaml(Out, *MachOObj)) {
return errorToErrorCode(std::move(Err));
}
return obj2yaml_error::success;
}
return obj2yaml_error::unsupported_obj_file_format;
}
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