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MachODump.cpp
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//===-- MachODump.cpp - Object file dumping utility for llvm --------------===//
//
// 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 implements the MachO-specific dumper for llvm-mctoll.
//
//===----------------------------------------------------------------------===//
// NOLINTBEGIN
#include "llvm-c/Disassembler.h"
#include "llvm-mctoll.h"
#include "Raiser/ModuleRaiser.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Triple.h"
#include "llvm/BinaryFormat/MachO.h"
#include "llvm/Config/config.h"
#include "llvm/DebugInfo/DIContext.h"
#include "llvm/DebugInfo/DWARF/DWARFContext.h"
#include "llvm/Demangle/Demangle.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDisassembler/MCDisassembler.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstPrinter.h"
#include "llvm/MC/MCInstrDesc.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCTargetOptions.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Object/MachO.h"
#include "llvm/Object/MachOUniversal.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/GraphWriter.h"
#include "llvm/Support/LEB128.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/ToolOutputFile.h"
#include <algorithm>
#include <cstring>
#include <system_error>
#ifdef HAVE_LIBXAR
extern "C" {
#include <xar/xar.h>
}
#endif
using namespace llvm;
using namespace llvm::mctoll;
using namespace object;
extern std::string MCPU;
extern std::vector<std::string> MAttrs;
static std::string DisSymName;
static bool PrintImmHex;
static bool UseDbg;
static std::string DSYMFile;
static bool FullLeadingAddr;
static bool NoLeadingHeaders;
// static bool ArchiveMemberOffsets;
static bool NonVerbose;
static bool NoSymbolicOperands;
static std::vector<std::string> ArchFlags;
bool ArchAll = false;
static std::string ThumbTripleName;
static const Target *GetTarget(const MachOObjectFile *MachOObj,
const char **McpuDefault,
const Target **ThumbTarget) {
// Figure out the target triple.
llvm::Triple TT(TripleName);
if (TripleName.empty()) {
TT = MachOObj->getArchTriple(McpuDefault);
TripleName = TT.str();
}
if (TT.getArch() == Triple::arm) {
// We've inferred a 32-bit ARM target from the object file. All MachO CPUs
// that support ARM are also capable of Thumb mode.
llvm::Triple ThumbTriple = TT;
std::string ThumbName = (Twine("thumb") + TT.getArchName().substr(3)).str();
ThumbTriple.setArchName(ThumbName);
ThumbTripleName = ThumbTriple.str();
}
// Get the target specific parser.
std::string Error;
const Target *TheTarget = TargetRegistry::lookupTarget(TripleName, Error);
if (TheTarget && ThumbTripleName.empty())
return TheTarget;
*ThumbTarget = TargetRegistry::lookupTarget(ThumbTripleName, Error);
if (*ThumbTarget)
return TheTarget;
errs() << "llvm-mctoll: error: unable to get target for '";
if (!TheTarget)
errs() << TripleName;
else
errs() << ThumbTripleName;
errs() << "', see --version and --triple.\n";
return nullptr;
}
struct SymbolSorter {
bool operator()(const SymbolRef &A, const SymbolRef &B) {
Expected<SymbolRef::Type> ATypeOrErr = A.getType();
if (!ATypeOrErr)
reportError(ATypeOrErr.takeError(), A.getObject()->getFileName());
SymbolRef::Type AType = *ATypeOrErr;
Expected<SymbolRef::Type> BTypeOrErr = B.getType();
if (!BTypeOrErr)
reportError(BTypeOrErr.takeError(), B.getObject()->getFileName());
SymbolRef::Type BType = *BTypeOrErr;
auto ASymOrErr = A.getValue();
if (!ASymOrErr)
reportError(ASymOrErr.takeError(), A.getObject()->getFileName());
auto BSymOrErr = B.getValue();
if (!BSymOrErr)
reportError(BSymOrErr.takeError(), B.getObject()->getFileName());
uint64_t AAddr = (AType != SymbolRef::ST_Function) ? 0 : *ASymOrErr;
uint64_t BAddr = (BType != SymbolRef::ST_Function) ? 0 : *BSymOrErr;
return AAddr < BAddr;
}
};
// Types for the storted data in code table that is built before disassembly
// and the predicate function to sort them.
typedef std::pair<uint64_t, DiceRef> DiceTableEntry;
typedef std::vector<DiceTableEntry> DiceTable;
typedef DiceTable::iterator dice_table_iterator;
// This is used to search for a data in code table entry for the PC being
// disassembled. The j parameter has the PC in j.first. A single data in code
// table entry can cover many bytes for each of its Kind's. So if the offset,
// aka the i.first value, of the data in code table entry plus its Length
// covers the PC being searched for this will return true. If not it will
// return false.
static bool compareDiceTableEntries(const DiceTableEntry &i,
const DiceTableEntry &j) {
uint16_t Length;
i.second.getLength(Length);
return j.first >= i.first && j.first < i.first + Length;
}
static uint64_t DumpDataInCode(const uint8_t *bytes, uint64_t Length,
unsigned short Kind) {
uint32_t Value, Size = 1;
switch (Kind) {
default:
case MachO::DICE_KIND_DATA:
if (Length >= 4) {
dumpBytes(makeArrayRef(bytes, 4), outs());
Value = bytes[3] << 24 | bytes[2] << 16 | bytes[1] << 8 | bytes[0];
outs() << "\t.long " << Value;
Size = 4;
} else if (Length >= 2) {
dumpBytes(makeArrayRef(bytes, 2), outs());
Value = bytes[1] << 8 | bytes[0];
outs() << "\t.short " << Value;
Size = 2;
} else {
dumpBytes(makeArrayRef(bytes, 2), outs());
Value = bytes[0];
outs() << "\t.byte " << Value;
Size = 1;
}
if (Kind == MachO::DICE_KIND_DATA)
outs() << "\t@ KIND_DATA\n";
else
outs() << "\t@ data in code kind = " << Kind << "\n";
break;
case MachO::DICE_KIND_JUMP_TABLE8:
dumpBytes(makeArrayRef(bytes, 1), outs());
Value = bytes[0];
outs() << "\t.byte " << format("%3u", Value) << "\t@ KIND_JUMP_TABLE8\n";
Size = 1;
break;
case MachO::DICE_KIND_JUMP_TABLE16:
dumpBytes(makeArrayRef(bytes, 2), outs());
Value = bytes[1] << 8 | bytes[0];
outs() << "\t.short " << format("%5u", Value & 0xffff)
<< "\t@ KIND_JUMP_TABLE16\n";
Size = 2;
break;
case MachO::DICE_KIND_JUMP_TABLE32:
case MachO::DICE_KIND_ABS_JUMP_TABLE32:
dumpBytes(makeArrayRef(bytes, 4), outs());
Value = bytes[3] << 24 | bytes[2] << 16 | bytes[1] << 8 | bytes[0];
outs() << "\t.long " << Value;
if (Kind == MachO::DICE_KIND_JUMP_TABLE32)
outs() << "\t@ KIND_JUMP_TABLE32\n";
else
outs() << "\t@ KIND_ABS_JUMP_TABLE32\n";
Size = 4;
break;
}
return Size;
}
static void getSectionsAndSymbols(MachOObjectFile *MachOObj,
std::vector<SectionRef> &Sections,
std::vector<SymbolRef> &Symbols,
SmallVectorImpl<uint64_t> &FoundFns,
uint64_t &BaseSegmentAddress) {
const StringRef FileName = MachOObj->getFileName();
for (const SymbolRef &Symbol : MachOObj->symbols()) {
StringRef SymName = unwrapOrError(Symbol.getName(), FileName);
if (!SymName.startswith("ltmp"))
Symbols.push_back(Symbol);
}
for (const SectionRef &Section : MachOObj->sections()) {
StringRef SecName;
if (auto NameOrErr = Section.getName())
SecName = *NameOrErr;
else
consumeError(NameOrErr.takeError());
Sections.push_back(Section);
}
bool BaseSegmentAddressSet = false;
for (const auto &Command : MachOObj->load_commands()) {
if (Command.C.cmd == MachO::LC_FUNCTION_STARTS) {
// We found a function starts segment, parse the addresses for later
// consumption.
MachO::linkedit_data_command LLC =
MachOObj->getLinkeditDataLoadCommand(Command);
MachOObj->ReadULEB128s(LLC.dataoff, FoundFns);
} else if (Command.C.cmd == MachO::LC_SEGMENT) {
MachO::segment_command SLC = MachOObj->getSegmentLoadCommand(Command);
StringRef SegName = SLC.segname;
if (!BaseSegmentAddressSet && SegName != "__PAGEZERO") {
BaseSegmentAddressSet = true;
BaseSegmentAddress = SLC.vmaddr;
}
}
}
}
typedef DenseMap<uint64_t, StringRef> SymbolAddressMap;
static void CreateSymbolAddressMap(MachOObjectFile *O,
SymbolAddressMap *AddrMap) {
// Create a map of symbol addresses to symbol names.
const StringRef FileName = O->getFileName();
for (const SymbolRef &Symbol : O->symbols()) {
SymbolRef::Type ST = unwrapOrError(Symbol.getType(), FileName);
if (ST == SymbolRef::ST_Function || ST == SymbolRef::ST_Data ||
ST == SymbolRef::ST_Other) {
auto SymOrErr = Symbol.getValue();
if (!SymOrErr)
reportError(SymOrErr.takeError(), Symbol.getObject()->getFileName());
uint64_t Address = *SymOrErr;
StringRef SymName = unwrapOrError(Symbol.getName(), FileName);
if (!SymName.startswith(".objc"))
(*AddrMap)[Address] = SymName;
}
}
}
// GuessSymbolName is passed the address of what might be a symbol and a
// pointer to the SymbolAddressMap. It returns the name of a symbol
// with that address or nullptr if no symbol is found with that address.
static const char *GuessSymbolName(uint64_t value, SymbolAddressMap *AddrMap) {
const char *SymbolName = nullptr;
// A DenseMap can't lookup up some values.
if (value != 0xffffffffffffffffULL && value != 0xfffffffffffffffeULL) {
StringRef name = AddrMap->lookup(value);
if (!name.empty())
SymbolName = name.data();
}
return SymbolName;
}
static void DumpCstringChar(const char c) {
char p[2];
p[0] = c;
p[1] = '\0';
outs().write_escaped(p);
}
static void DumpCstringSection(MachOObjectFile *O, const char *sect,
uint32_t sect_size, uint64_t sect_addr,
bool print_addresses) {
for (uint32_t i = 0; i < sect_size; i++) {
if (print_addresses) {
if (O->is64Bit())
outs() << format("%016" PRIx64, sect_addr + i) << " ";
else
outs() << format("%08" PRIx64, sect_addr + i) << " ";
}
for (; i < sect_size && sect[i] != '\0'; i++)
DumpCstringChar(sect[i]);
if (i < sect_size && sect[i] == '\0')
outs() << "\n";
}
}
static void DumpLiteral4(uint32_t l, float f) {
outs() << format("0x%08" PRIx32, l);
if ((l & 0x7f800000) != 0x7f800000)
outs() << format(" (%.16e)\n", f);
else {
if (l == 0x7f800000)
outs() << " (+Infinity)\n";
else if (l == 0xff800000)
outs() << " (-Infinity)\n";
else if ((l & 0x00400000) == 0x00400000)
outs() << " (non-signaling Not-a-Number)\n";
else
outs() << " (signaling Not-a-Number)\n";
}
}
static void DumpLiteral4Section(MachOObjectFile *O, const char *sect,
uint32_t sect_size, uint64_t sect_addr,
bool print_addresses) {
for (uint32_t i = 0; i < sect_size; i += sizeof(float)) {
if (print_addresses) {
if (O->is64Bit())
outs() << format("%016" PRIx64, sect_addr + i) << " ";
else
outs() << format("%08" PRIx64, sect_addr + i) << " ";
}
float f;
memcpy(&f, sect + i, sizeof(float));
if (O->isLittleEndian() != sys::IsLittleEndianHost)
sys::swapByteOrder(f);
uint32_t l;
memcpy(&l, sect + i, sizeof(uint32_t));
if (O->isLittleEndian() != sys::IsLittleEndianHost)
sys::swapByteOrder(l);
DumpLiteral4(l, f);
}
}
static void DumpLiteral8(MachOObjectFile *O, uint32_t l0, uint32_t l1,
double d) {
outs() << format("0x%08" PRIx32, l0) << " " << format("0x%08" PRIx32, l1);
uint32_t Hi, Lo;
Hi = (O->isLittleEndian()) ? l1 : l0;
Lo = (O->isLittleEndian()) ? l0 : l1;
// Hi is the high word, so this is equivalent to if(isfinite(d))
if ((Hi & 0x7ff00000) != 0x7ff00000)
outs() << format(" (%.16e)\n", d);
else {
if (Hi == 0x7ff00000 && Lo == 0)
outs() << " (+Infinity)\n";
else if (Hi == 0xfff00000 && Lo == 0)
outs() << " (-Infinity)\n";
else if ((Hi & 0x00080000) == 0x00080000)
outs() << " (non-signaling Not-a-Number)\n";
else
outs() << " (signaling Not-a-Number)\n";
}
}
static void DumpLiteral8Section(MachOObjectFile *O, const char *sect,
uint32_t sect_size, uint64_t sect_addr,
bool print_addresses) {
for (uint32_t i = 0; i < sect_size; i += sizeof(double)) {
if (print_addresses) {
if (O->is64Bit())
outs() << format("%016" PRIx64, sect_addr + i) << " ";
else
outs() << format("%08" PRIx64, sect_addr + i) << " ";
}
double d;
memcpy(&d, sect + i, sizeof(double));
if (O->isLittleEndian() != sys::IsLittleEndianHost)
sys::swapByteOrder(d);
uint32_t l0, l1;
memcpy(&l0, sect + i, sizeof(uint32_t));
memcpy(&l1, sect + i + sizeof(uint32_t), sizeof(uint32_t));
if (O->isLittleEndian() != sys::IsLittleEndianHost) {
sys::swapByteOrder(l0);
sys::swapByteOrder(l1);
}
DumpLiteral8(O, l0, l1, d);
}
}
static void DumpLiteral16(uint32_t l0, uint32_t l1, uint32_t l2, uint32_t l3) {
outs() << format("0x%08" PRIx32, l0) << " ";
outs() << format("0x%08" PRIx32, l1) << " ";
outs() << format("0x%08" PRIx32, l2) << " ";
outs() << format("0x%08" PRIx32, l3) << "\n";
}
static void DumpLiteral16Section(MachOObjectFile *O, const char *sect,
uint32_t sect_size, uint64_t sect_addr,
bool print_addresses) {
for (uint32_t i = 0; i < sect_size; i += 16) {
if (print_addresses) {
if (O->is64Bit())
outs() << format("%016" PRIx64, sect_addr + i) << " ";
else
outs() << format("%08" PRIx64, sect_addr + i) << " ";
}
uint32_t l0, l1, l2, l3;
memcpy(&l0, sect + i, sizeof(uint32_t));
memcpy(&l1, sect + i + sizeof(uint32_t), sizeof(uint32_t));
memcpy(&l2, sect + i + 2 * sizeof(uint32_t), sizeof(uint32_t));
memcpy(&l3, sect + i + 3 * sizeof(uint32_t), sizeof(uint32_t));
if (O->isLittleEndian() != sys::IsLittleEndianHost) {
sys::swapByteOrder(l0);
sys::swapByteOrder(l1);
sys::swapByteOrder(l2);
sys::swapByteOrder(l3);
}
DumpLiteral16(l0, l1, l2, l3);
}
}
static void DumpLiteralPointerSection(MachOObjectFile *O,
const SectionRef &Section,
const char *sect, uint32_t sect_size,
uint64_t sect_addr,
bool print_addresses) {
// Collect the literal sections in this Mach-O file.
std::vector<SectionRef> LiteralSections;
for (const SectionRef &Section : O->sections()) {
DataRefImpl Ref = Section.getRawDataRefImpl();
uint32_t section_type;
if (O->is64Bit()) {
const MachO::section_64 Sec = O->getSection64(Ref);
section_type = Sec.flags & MachO::SECTION_TYPE;
} else {
const MachO::section Sec = O->getSection(Ref);
section_type = Sec.flags & MachO::SECTION_TYPE;
}
if (section_type == MachO::S_CSTRING_LITERALS ||
section_type == MachO::S_4BYTE_LITERALS ||
section_type == MachO::S_8BYTE_LITERALS ||
section_type == MachO::S_16BYTE_LITERALS)
LiteralSections.push_back(Section);
}
// Set the size of the literal pointer.
uint32_t lp_size = O->is64Bit() ? 8 : 4;
// Collect the external relocation symbols for the literal pointers.
std::vector<std::pair<uint64_t, SymbolRef>> Relocs;
for (const RelocationRef &Reloc : Section.relocations()) {
DataRefImpl Rel;
MachO::any_relocation_info RE;
bool isExtern = false;
Rel = Reloc.getRawDataRefImpl();
RE = O->getRelocation(Rel);
isExtern = O->getPlainRelocationExternal(RE);
if (isExtern) {
uint64_t RelocOffset = Reloc.getOffset();
symbol_iterator RelocSym = Reloc.getSymbol();
Relocs.push_back(std::make_pair(RelocOffset, *RelocSym));
}
}
array_pod_sort(Relocs.begin(), Relocs.end());
// Dump each literal pointer.
for (uint32_t i = 0; i < sect_size; i += lp_size) {
if (print_addresses) {
if (O->is64Bit())
outs() << format("%016" PRIx64, sect_addr + i) << " ";
else
outs() << format("%08" PRIx64, sect_addr + i) << " ";
}
uint64_t lp;
if (O->is64Bit()) {
memcpy(&lp, sect + i, sizeof(uint64_t));
if (O->isLittleEndian() != sys::IsLittleEndianHost)
sys::swapByteOrder(lp);
} else {
uint32_t li;
memcpy(&li, sect + i, sizeof(uint32_t));
if (O->isLittleEndian() != sys::IsLittleEndianHost)
sys::swapByteOrder(li);
lp = li;
}
// First look for an external relocation entry for this literal pointer.
auto Reloc = find_if(Relocs, [&](const std::pair<uint64_t, SymbolRef> &P) {
return P.first == i;
});
if (Reloc != Relocs.end()) {
symbol_iterator RelocSym = Reloc->second;
StringRef SymName = unwrapOrError(RelocSym->getName(), O->getFileName());
outs() << "external relocation entry for symbol:" << SymName << "\n";
continue;
}
// For local references see what the section the literal pointer points to.
auto Sect = find_if(LiteralSections, [&](const SectionRef &R) {
return lp >= R.getAddress() && lp < R.getAddress() + R.getSize();
});
if (Sect == LiteralSections.end()) {
outs() << format("0x%" PRIx64, lp) << " (not in a literal section)\n";
continue;
}
uint64_t SectAddress = Sect->getAddress();
uint64_t SectSize = Sect->getSize();
StringRef SectName;
if (auto NameOrErr = Section.getName())
SectName = *NameOrErr;
else
consumeError(NameOrErr.takeError());
DataRefImpl Ref = Sect->getRawDataRefImpl();
StringRef SegmentName = O->getSectionFinalSegmentName(Ref);
outs() << SegmentName << ":" << SectName << ":";
uint32_t section_type;
if (O->is64Bit()) {
const MachO::section_64 Sec = O->getSection64(Ref);
section_type = Sec.flags & MachO::SECTION_TYPE;
} else {
const MachO::section Sec = O->getSection(Ref);
section_type = Sec.flags & MachO::SECTION_TYPE;
}
StringRef BytesStr = unwrapOrError(Sect->getContents(), O->getFileName());
const char *Contents = reinterpret_cast<const char *>(BytesStr.data());
switch (section_type) {
case MachO::S_CSTRING_LITERALS:
for (uint64_t i = lp - SectAddress; i < SectSize && Contents[i] != '\0';
i++) {
DumpCstringChar(Contents[i]);
}
outs() << "\n";
break;
case MachO::S_4BYTE_LITERALS:
float f;
memcpy(&f, Contents + (lp - SectAddress), sizeof(float));
uint32_t l;
memcpy(&l, Contents + (lp - SectAddress), sizeof(uint32_t));
if (O->isLittleEndian() != sys::IsLittleEndianHost) {
sys::swapByteOrder(f);
sys::swapByteOrder(l);
}
DumpLiteral4(l, f);
break;
case MachO::S_8BYTE_LITERALS: {
double d;
memcpy(&d, Contents + (lp - SectAddress), sizeof(double));
uint32_t l0, l1;
memcpy(&l0, Contents + (lp - SectAddress), sizeof(uint32_t));
memcpy(&l1, Contents + (lp - SectAddress) + sizeof(uint32_t),
sizeof(uint32_t));
if (O->isLittleEndian() != sys::IsLittleEndianHost) {
sys::swapByteOrder(f);
sys::swapByteOrder(l0);
sys::swapByteOrder(l1);
}
DumpLiteral8(O, l0, l1, d);
break;
}
case MachO::S_16BYTE_LITERALS: {
uint32_t l0, l1, l2, l3;
memcpy(&l0, Contents + (lp - SectAddress), sizeof(uint32_t));
memcpy(&l1, Contents + (lp - SectAddress) + sizeof(uint32_t),
sizeof(uint32_t));
memcpy(&l2, Contents + (lp - SectAddress) + 2 * sizeof(uint32_t),
sizeof(uint32_t));
memcpy(&l3, Contents + (lp - SectAddress) + 3 * sizeof(uint32_t),
sizeof(uint32_t));
if (O->isLittleEndian() != sys::IsLittleEndianHost) {
sys::swapByteOrder(l0);
sys::swapByteOrder(l1);
sys::swapByteOrder(l2);
sys::swapByteOrder(l3);
}
DumpLiteral16(l0, l1, l2, l3);
break;
}
}
}
}
static void DumpInitTermPointerSection(MachOObjectFile *O, const char *sect,
uint32_t sect_size, uint64_t sect_addr,
SymbolAddressMap *AddrMap,
bool verbose) {
uint32_t stride;
stride = (O->is64Bit()) ? sizeof(uint64_t) : sizeof(uint32_t);
for (uint32_t i = 0; i < sect_size; i += stride) {
const char *SymbolName = nullptr;
if (O->is64Bit()) {
outs() << format("0x%016" PRIx64, sect_addr + i * stride) << " ";
uint64_t pointer_value;
memcpy(&pointer_value, sect + i, stride);
if (O->isLittleEndian() != sys::IsLittleEndianHost)
sys::swapByteOrder(pointer_value);
outs() << format("0x%016" PRIx64, pointer_value);
if (verbose)
SymbolName = GuessSymbolName(pointer_value, AddrMap);
} else {
outs() << format("0x%08" PRIx64, sect_addr + i * stride) << " ";
uint32_t pointer_value;
memcpy(&pointer_value, sect + i, stride);
if (O->isLittleEndian() != sys::IsLittleEndianHost)
sys::swapByteOrder(pointer_value);
outs() << format("0x%08" PRIx32, pointer_value);
if (verbose)
SymbolName = GuessSymbolName(pointer_value, AddrMap);
}
if (SymbolName)
outs() << " " << SymbolName;
outs() << "\n";
}
}
static void DumpRawSectionContents(MachOObjectFile *O, const char *sect,
uint32_t size, uint64_t addr) {
uint32_t cputype = O->getHeader().cputype;
if (cputype == MachO::CPU_TYPE_I386 || cputype == MachO::CPU_TYPE_X86_64) {
uint32_t j;
for (uint32_t i = 0; i < size; i += j, addr += j) {
if (O->is64Bit())
outs() << format("%016" PRIx64, addr) << "\t";
else
outs() << format("%08" PRIx64, addr) << "\t";
for (j = 0; j < 16 && i + j < size; j++) {
uint8_t byte_word = *(sect + i + j);
outs() << format("%02" PRIx32, (uint32_t)byte_word) << " ";
}
outs() << "\n";
}
} else {
uint32_t j;
for (uint32_t i = 0; i < size; i += j, addr += j) {
if (O->is64Bit())
outs() << format("%016" PRIx64, addr) << "\t";
else
outs() << format("%08" PRIx64, addr) << "\t";
for (j = 0; j < 4 * sizeof(int32_t) && i + j < size;
j += sizeof(int32_t)) {
if (i + j + sizeof(int32_t) <= size) {
uint32_t long_word;
memcpy(&long_word, sect + i + j, sizeof(int32_t));
if (O->isLittleEndian() != sys::IsLittleEndianHost)
sys::swapByteOrder(long_word);
outs() << format("%08" PRIx32, long_word) << " ";
} else {
for (uint32_t k = 0; i + j + k < size; k++) {
uint8_t byte_word = *(sect + i + j + k);
outs() << format("%02" PRIx32, (uint32_t)byte_word) << " ";
}
}
}
outs() << "\n";
}
}
}
static void DisassembleMachO(StringRef Filename, MachOObjectFile *MachOOF,
StringRef DisSegName, StringRef DisSectName);
static void DumpProtocolSection(MachOObjectFile *O, const char *sect,
uint32_t size, uint32_t addr);
#ifdef HAVE_LIBXAR
static void DumpBitcodeSection(MachOObjectFile *O, const char *sect,
uint32_t size, bool verbose, bool PrintXarHeader,
bool PrintXarFileHeaders,
std::string XarMemberName);
#endif // defined(HAVE_LIBXAR)
static void DumpSectionContents(StringRef Filename, MachOObjectFile *O,
bool verbose) {
SymbolAddressMap AddrMap;
if (verbose)
CreateSymbolAddressMap(O, &AddrMap);
for (unsigned i = 0; i < FilterSections.size(); ++i) {
StringRef DumpSection = FilterSections[i];
std::pair<StringRef, StringRef> DumpSegSectName;
DumpSegSectName = DumpSection.split(',');
StringRef DumpSegName, DumpSectName;
if (DumpSegSectName.second.size()) {
DumpSegName = DumpSegSectName.first;
DumpSectName = DumpSegSectName.second;
} else {
DumpSegName = "";
DumpSectName = DumpSegSectName.first;
}
for (const SectionRef &Section : O->sections()) {
StringRef SectName;
if (auto NameOrErr = Section.getName())
SectName = *NameOrErr;
else
consumeError(NameOrErr.takeError());
DataRefImpl Ref = Section.getRawDataRefImpl();
StringRef SegName = O->getSectionFinalSegmentName(Ref);
if ((DumpSegName.empty() || SegName == DumpSegName) &&
(SectName == DumpSectName)) {
uint32_t section_flags;
if (O->is64Bit()) {
const MachO::section_64 Sec = O->getSection64(Ref);
section_flags = Sec.flags;
} else {
const MachO::section Sec = O->getSection(Ref);
section_flags = Sec.flags;
}
uint32_t section_type = section_flags & MachO::SECTION_TYPE;
StringRef BytesStr =
unwrapOrError(Section.getContents(), O->getFileName());
const char *sect = reinterpret_cast<const char *>(BytesStr.data());
uint32_t sect_size = BytesStr.size();
uint64_t sect_addr = Section.getAddress();
outs() << "Contents of (" << SegName << "," << SectName
<< ") section\n";
if (verbose) {
if ((section_flags & MachO::S_ATTR_PURE_INSTRUCTIONS) ||
(section_flags & MachO::S_ATTR_SOME_INSTRUCTIONS)) {
DisassembleMachO(Filename, O, SegName, SectName);
continue;
}
if (SegName == "__TEXT" && SectName == "__info_plist") {
outs() << sect;
continue;
}
if (SegName == "__OBJC" && SectName == "__protocol") {
DumpProtocolSection(O, sect, sect_size, sect_addr);
continue;
}
#ifdef HAVE_LIBXAR
if (SegName == "__LLVM" && SectName == "__bundle") {
DumpBitcodeSection(O, sect, sect_size, verbose, !NoSymbolicOperands,
true, "");
continue;
}
#endif // defined(HAVE_LIBXAR)
switch (section_type) {
case MachO::S_REGULAR:
DumpRawSectionContents(O, sect, sect_size, sect_addr);
break;
case MachO::S_ZEROFILL:
outs() << "zerofill section and has no contents in the file\n";
break;
case MachO::S_CSTRING_LITERALS:
DumpCstringSection(O, sect, sect_size, sect_addr, true);
break;
case MachO::S_4BYTE_LITERALS:
DumpLiteral4Section(O, sect, sect_size, sect_addr, true);
break;
case MachO::S_8BYTE_LITERALS:
DumpLiteral8Section(O, sect, sect_size, sect_addr, true);
break;
case MachO::S_16BYTE_LITERALS:
DumpLiteral16Section(O, sect, sect_size, sect_addr, true);
break;
case MachO::S_LITERAL_POINTERS:
DumpLiteralPointerSection(O, Section, sect, sect_size, sect_addr,
true);
break;
case MachO::S_MOD_INIT_FUNC_POINTERS:
case MachO::S_MOD_TERM_FUNC_POINTERS:
DumpInitTermPointerSection(O, sect, sect_size, sect_addr, &AddrMap,
verbose);
break;
default:
outs() << "Unknown section type ("
<< format("0x%08" PRIx32, section_type) << ")\n";
DumpRawSectionContents(O, sect, sect_size, sect_addr);
break;
}
} else {
if (section_type == MachO::S_ZEROFILL)
outs() << "zerofill section and has no contents in the file\n";
else
DumpRawSectionContents(O, sect, sect_size, sect_addr);
}
}
}
}
}
// checkMachOAndArchFlags() checks to see if the ObjectFile is a Mach-O file
// and if it is and there is a list of architecture flags is specified then
// check to make sure this Mach-O file is one of those architectures or all
// architectures were specified. If not then an error is generated and this
// routine returns false. Else it returns true.
static bool checkMachOAndArchFlags(ObjectFile *O, StringRef Filename) {
auto *MachO = dyn_cast<MachOObjectFile>(O);
if (!MachO || ArchAll || ArchFlags.empty())
return true;
MachO::mach_header H;
MachO::mach_header_64 H_64;
Triple T;
const char *McpuDefault, *ArchFlag;
if (MachO->is64Bit()) {
H_64 = MachO->MachOObjectFile::getHeader64();
T = MachOObjectFile::getArchTriple(H_64.cputype, H_64.cpusubtype,
&McpuDefault, &ArchFlag);
} else {
H = MachO->MachOObjectFile::getHeader();
T = MachOObjectFile::getArchTriple(H.cputype, H.cpusubtype, &McpuDefault,
&ArchFlag);
}
const std::string ArchFlagName(ArchFlag);
if (none_of(ArchFlags,
[&](const std::string &Name) { return Name == ArchFlagName; })) {
errs() << "llvm-mctoll: " + Filename + ": No architecture specified.\n";
return false;
}
return true;
}
// ProcessMachO() is passed a single opened Mach-O file, which may be an
// archive member and or in a slice of a universal file. It prints the
// the file name and header info and then processes it according to the
// command line options.
static void ProcessMachO(StringRef Name, MachOObjectFile *MachOOF,
StringRef ArchiveMemberName = StringRef(),
StringRef ArchitectureName = StringRef()) {
if (Disassemble || (FilterSections.size() != 0)) {
if (!NoLeadingHeaders) {
outs() << Name;
if (!ArchiveMemberName.empty())
outs() << '(' << ArchiveMemberName << ')';
if (!ArchitectureName.empty())
outs() << " (architecture " << ArchitectureName << ")";
outs() << ":\n";
}
}
// To use the reportError() form with an ArchiveName and FileName set
// these up based on what is passed for Name and ArchiveMemberName.
StringRef ArchiveName;
StringRef FileName;
if (!ArchiveMemberName.empty()) {
ArchiveName = Name;
FileName = ArchiveMemberName;
} else {
ArchiveName = StringRef();
FileName = Name;
}
// If we need the symbol table to do the operation then check it here to
// produce a good error message as to where the Mach-O file comes from in
// the error message.
if (Disassemble || FilterSections.size() != 0)
if (Error Err = MachOOF->checkSymbolTable())
reportError(std::move(Err), ArchiveName, FileName, ArchitectureName);
if (Disassemble) {
if (MachOOF->getHeader().filetype == MachO::MH_KEXT_BUNDLE &&
MachOOF->getHeader().cputype == MachO::CPU_TYPE_ARM64)
DisassembleMachO(FileName, MachOOF, "__TEXT_EXEC", "__text");
else
DisassembleMachO(FileName, MachOOF, "__TEXT", "__text");
}
if (FilterSections.size() != 0)
DumpSectionContents(FileName, MachOOF, !NonVerbose);
}
// ParseInputMachO() parses the named Mach-O file in Filename and handles the
// -arch flags selecting just those slices as specified by them and also parses
// archive files. Then for each individual Mach-O file ProcessMachO() is
// called to process the file based on the command line options.
void mctoll::parseInputMachO(StringRef Filename) {
// Check for -arch all and verifiy the -arch flags are valid.
for (unsigned i = 0; i < ArchFlags.size(); ++i) {
if (ArchFlags[i] == "all") {
ArchAll = true;
} else {
if (!MachOObjectFile::isValidArch(ArchFlags[i])) {
errs() << "llvm-mctoll: Unknown architecture named '" + ArchFlags[i] +
"'for the -arch option\n";
return;
}
}
}
// Attempt to open the binary.
Expected<OwningBinary<Binary>> BinaryOrErr = createBinary(Filename);
if (!BinaryOrErr) {
if (auto E = isNotObjectErrorInvalidFileType(BinaryOrErr.takeError()))
reportError(std::move(E), Filename);
else
outs() << Filename << ": is not an object file\n";
return;
}
Binary &Bin = *BinaryOrErr.get().getBinary();
if (Archive *A = dyn_cast<Archive>(&Bin)) {
outs() << "Archive : " << Filename << "\n";
Error Err = Error::success();
for (auto &C : A->children(Err)) {
Expected<std::unique_ptr<Binary>> ChildOrErr = C.getAsBinary();
if (!ChildOrErr) {
if (auto E = isNotObjectErrorInvalidFileType(ChildOrErr.takeError()))
reportError(std::move(E), Filename, C);
continue;
}
if (MachOObjectFile *O = dyn_cast<MachOObjectFile>(&*ChildOrErr.get())) {
if (!checkMachOAndArchFlags(O, Filename))
return;
ProcessMachO(Filename, O, O->getFileName());
}
}
if (Err)
reportError(std::move(Err), Filename);
return;
}
if (MachOUniversalBinary *UB = dyn_cast<MachOUniversalBinary>(&Bin)) {
// If we have a list of architecture flags specified dump only those.
if (!ArchAll && ArchFlags.size() != 0) {
// Look for a slice in the universal binary that matches each ArchFlag.
bool ArchFound;
for (unsigned i = 0; i < ArchFlags.size(); ++i) {
ArchFound = false;
for (MachOUniversalBinary::object_iterator I = UB->begin_objects(),
E = UB->end_objects();
I != E; ++I) {
if (ArchFlags[i] == I->getArchFlagName()) {
ArchFound = true;
Expected<std::unique_ptr<ObjectFile>> ObjOrErr =
I->getAsObjectFile();
std::string ArchitectureName = "";
if (ArchFlags.size() > 1)
ArchitectureName = I->getArchFlagName();
if (ObjOrErr) {
ObjectFile &O = *ObjOrErr.get();
if (MachOObjectFile *MachOOF = dyn_cast<MachOObjectFile>(&O))
ProcessMachO(Filename, MachOOF, "", ArchitectureName);
} else if (auto E = isNotObjectErrorInvalidFileType(
ObjOrErr.takeError())) {
reportError(std::move(E), Filename, StringRef(),
ArchitectureName);
continue;
} else if (Expected<std::unique_ptr<Archive>> AOrErr =
I->getAsArchive()) {
std::unique_ptr<Archive> &A = *AOrErr;
outs() << "Archive : " << Filename;
if (!ArchitectureName.empty())
outs() << " (architecture " << ArchitectureName << ")";
outs() << "\n";
Error Err = Error::success();
for (auto &C : A->children(Err)) {
Expected<std::unique_ptr<Binary>> ChildOrErr = C.getAsBinary();
if (!ChildOrErr) {
if (auto E = isNotObjectErrorInvalidFileType(
ChildOrErr.takeError()))
reportError(std::move(E), Filename, C, ArchitectureName);
continue;
}
if (MachOObjectFile *O =
dyn_cast<MachOObjectFile>(&*ChildOrErr.get()))
ProcessMachO(Filename, O, O->getFileName(), ArchitectureName);
}
if (Err)
reportError(std::move(Err), Filename);
} else {
consumeError(AOrErr.takeError());
error("Mach-O universal file: " + Filename + " for " +
"architecture " + StringRef(I->getArchFlagName()) +
" is not a Mach-O file or an archive file");
}
}
}
if (!ArchFound) {
errs() << "llvm-mctoll: file: " + Filename + " does not contain "
<< "architecture: " + ArchFlags[i] + "\n";
return;
}
}
return;