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freebsd-nq/contrib/llvm/tools/macho-dump/macho-dump.cpp
Dimitry Andric 6bb1cadd56 Add a WITH_CLANG_EXTRAS option for src.conf(5), disabled by default, 
that builds the following additional llvm/clang tools:

- bugpoint
- llc
- lli
- llvm-ar
- llvm-as
- llvm-bcanalyzer
- llvm-diff
- llvm-dis
- llvm-extract
- llvm-ld
- llvm-link
- llvm-mc
- llvm-nm
- llvm-objdump
- llvm-prof
- llvm-ranlib
- llvm-rtdyld
- llvm-stub
- macho-dump
- opt

These tools are mainly useful for people that want to manipulate llvm
bitcode (.bc) and llvm assembly language (.ll) files, or want to tinker
with llvm and clang themselves.

MFC after:	2 weeks
2012-02-05 23:56:22 +00:00

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//===-- macho-dump.cpp - Mach Object Dumping Tool -------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This is a testing tool for use with the MC/Mach-O LLVM components.
//
//===----------------------------------------------------------------------===//
#include "llvm/Object/MachOObject.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/system_error.h"
using namespace llvm;
using namespace llvm::object;
static cl::opt<std::string>
InputFile(cl::Positional, cl::desc("<input file>"), cl::init("-"));
static cl::opt<bool>
ShowSectionData("dump-section-data", cl::desc("Dump the contents of sections"),
cl::init(false));
///
static const char *ProgramName;
static void Message(const char *Type, const Twine &Msg) {
errs() << ProgramName << ": " << Type << ": " << Msg << "\n";
}
static int Error(const Twine &Msg) {
Message("error", Msg);
return 1;
}
static void Warning(const Twine &Msg) {
Message("warning", Msg);
}
///
static void DumpSegmentCommandData(StringRef Name,
uint64_t VMAddr, uint64_t VMSize,
uint64_t FileOffset, uint64_t FileSize,
uint32_t MaxProt, uint32_t InitProt,
uint32_t NumSections, uint32_t Flags) {
outs() << " ('segment_name', '";
outs().write_escaped(Name, /*UseHexEscapes=*/true) << "')\n";
outs() << " ('vm_addr', " << VMAddr << ")\n";
outs() << " ('vm_size', " << VMSize << ")\n";
outs() << " ('file_offset', " << FileOffset << ")\n";
outs() << " ('file_size', " << FileSize << ")\n";
outs() << " ('maxprot', " << MaxProt << ")\n";
outs() << " ('initprot', " << InitProt << ")\n";
outs() << " ('num_sections', " << NumSections << ")\n";
outs() << " ('flags', " << Flags << ")\n";
}
static int DumpSectionData(MachOObject &Obj, unsigned Index, StringRef Name,
StringRef SegmentName, uint64_t Address,
uint64_t Size, uint32_t Offset,
uint32_t Align, uint32_t RelocationTableOffset,
uint32_t NumRelocationTableEntries,
uint32_t Flags, uint32_t Reserved1,
uint32_t Reserved2, uint64_t Reserved3 = ~0ULL) {
outs() << " # Section " << Index << "\n";
outs() << " (('section_name', '";
outs().write_escaped(Name, /*UseHexEscapes=*/true) << "')\n";
outs() << " ('segment_name', '";
outs().write_escaped(SegmentName, /*UseHexEscapes=*/true) << "')\n";
outs() << " ('address', " << Address << ")\n";
outs() << " ('size', " << Size << ")\n";
outs() << " ('offset', " << Offset << ")\n";
outs() << " ('alignment', " << Align << ")\n";
outs() << " ('reloc_offset', " << RelocationTableOffset << ")\n";
outs() << " ('num_reloc', " << NumRelocationTableEntries << ")\n";
outs() << " ('flags', " << format("0x%x", Flags) << ")\n";
outs() << " ('reserved1', " << Reserved1 << ")\n";
outs() << " ('reserved2', " << Reserved2 << ")\n";
if (Reserved3 != ~0ULL)
outs() << " ('reserved3', " << Reserved3 << ")\n";
outs() << " ),\n";
// Dump the relocation entries.
int Res = 0;
outs() << " ('_relocations', [\n";
for (unsigned i = 0; i != NumRelocationTableEntries; ++i) {
InMemoryStruct<macho::RelocationEntry> RE;
Obj.ReadRelocationEntry(RelocationTableOffset, i, RE);
if (!RE) {
Res = Error("unable to read relocation table entry '" + Twine(i) + "'");
break;
}
outs() << " # Relocation " << i << "\n";
outs() << " (('word-0', " << format("0x%x", RE->Word0) << "),\n";
outs() << " ('word-1', " << format("0x%x", RE->Word1) << ")),\n";
}
outs() << " ])\n";
// Dump the section data, if requested.
if (ShowSectionData) {
outs() << " ('_section_data', '";
StringRef Data = Obj.getData(Offset, Size);
for (unsigned i = 0; i != Data.size(); ++i) {
if (i && (i % 4) == 0)
outs() << ' ';
outs() << hexdigit((Data[i] >> 4) & 0xF, /*LowerCase=*/true);
outs() << hexdigit((Data[i] >> 0) & 0xF, /*LowerCase=*/true);
}
outs() << "')\n";
}
return Res;
}
static int DumpSegmentCommand(MachOObject &Obj,
const MachOObject::LoadCommandInfo &LCI) {
InMemoryStruct<macho::SegmentLoadCommand> SLC;
Obj.ReadSegmentLoadCommand(LCI, SLC);
if (!SLC)
return Error("unable to read segment load command");
DumpSegmentCommandData(StringRef(SLC->Name, 16), SLC->VMAddress,
SLC->VMSize, SLC->FileOffset, SLC->FileSize,
SLC->MaxVMProtection, SLC->InitialVMProtection,
SLC->NumSections, SLC->Flags);
// Dump the sections.
int Res = 0;
outs() << " ('sections', [\n";
for (unsigned i = 0; i != SLC->NumSections; ++i) {
InMemoryStruct<macho::Section> Sect;
Obj.ReadSection(LCI, i, Sect);
if (!SLC) {
Res = Error("unable to read section '" + Twine(i) + "'");
break;
}
if ((Res = DumpSectionData(Obj, i, StringRef(Sect->Name, 16),
StringRef(Sect->SegmentName, 16), Sect->Address,
Sect->Size, Sect->Offset, Sect->Align,
Sect->RelocationTableOffset,
Sect->NumRelocationTableEntries, Sect->Flags,
Sect->Reserved1, Sect->Reserved2)))
break;
}
outs() << " ])\n";
return Res;
}
static int DumpSegment64Command(MachOObject &Obj,
const MachOObject::LoadCommandInfo &LCI) {
InMemoryStruct<macho::Segment64LoadCommand> SLC;
Obj.ReadSegment64LoadCommand(LCI, SLC);
if (!SLC)
return Error("unable to read segment load command");
DumpSegmentCommandData(StringRef(SLC->Name, 16), SLC->VMAddress,
SLC->VMSize, SLC->FileOffset, SLC->FileSize,
SLC->MaxVMProtection, SLC->InitialVMProtection,
SLC->NumSections, SLC->Flags);
// Dump the sections.
int Res = 0;
outs() << " ('sections', [\n";
for (unsigned i = 0; i != SLC->NumSections; ++i) {
InMemoryStruct<macho::Section64> Sect;
Obj.ReadSection64(LCI, i, Sect);
if (!SLC) {
Res = Error("unable to read section '" + Twine(i) + "'");
break;
}
if ((Res = DumpSectionData(Obj, i, StringRef(Sect->Name, 16),
StringRef(Sect->SegmentName, 16), Sect->Address,
Sect->Size, Sect->Offset, Sect->Align,
Sect->RelocationTableOffset,
Sect->NumRelocationTableEntries, Sect->Flags,
Sect->Reserved1, Sect->Reserved2,
Sect->Reserved3)))
break;
}
outs() << " ])\n";
return 0;
}
static void DumpSymbolTableEntryData(MachOObject &Obj,
unsigned Index, uint32_t StringIndex,
uint8_t Type, uint8_t SectionIndex,
uint16_t Flags, uint64_t Value) {
outs() << " # Symbol " << Index << "\n";
outs() << " (('n_strx', " << StringIndex << ")\n";
outs() << " ('n_type', " << format("0x%x", Type) << ")\n";
outs() << " ('n_sect', " << uint32_t(SectionIndex) << ")\n";
outs() << " ('n_desc', " << Flags << ")\n";
outs() << " ('n_value', " << Value << ")\n";
outs() << " ('_string', '" << Obj.getStringAtIndex(StringIndex) << "')\n";
outs() << " ),\n";
}
static int DumpSymtabCommand(MachOObject &Obj,
const MachOObject::LoadCommandInfo &LCI) {
InMemoryStruct<macho::SymtabLoadCommand> SLC;
Obj.ReadSymtabLoadCommand(LCI, SLC);
if (!SLC)
return Error("unable to read segment load command");
outs() << " ('symoff', " << SLC->SymbolTableOffset << ")\n";
outs() << " ('nsyms', " << SLC->NumSymbolTableEntries << ")\n";
outs() << " ('stroff', " << SLC->StringTableOffset << ")\n";
outs() << " ('strsize', " << SLC->StringTableSize << ")\n";
// Cache the string table data.
Obj.RegisterStringTable(*SLC);
// Dump the string data.
outs() << " ('_string_data', '";
outs().write_escaped(Obj.getStringTableData(),
/*UseHexEscapes=*/true) << "')\n";
// Dump the symbol table.
int Res = 0;
outs() << " ('_symbols', [\n";
for (unsigned i = 0; i != SLC->NumSymbolTableEntries; ++i) {
if (Obj.is64Bit()) {
InMemoryStruct<macho::Symbol64TableEntry> STE;
Obj.ReadSymbol64TableEntry(SLC->SymbolTableOffset, i, STE);
if (!STE) {
Res = Error("unable to read symbol: '" + Twine(i) + "'");
break;
}
DumpSymbolTableEntryData(Obj, i, STE->StringIndex, STE->Type,
STE->SectionIndex, STE->Flags, STE->Value);
} else {
InMemoryStruct<macho::SymbolTableEntry> STE;
Obj.ReadSymbolTableEntry(SLC->SymbolTableOffset, i, STE);
if (!SLC) {
Res = Error("unable to read symbol: '" + Twine(i) + "'");
break;
}
DumpSymbolTableEntryData(Obj, i, STE->StringIndex, STE->Type,
STE->SectionIndex, STE->Flags, STE->Value);
}
}
outs() << " ])\n";
return Res;
}
static int DumpDysymtabCommand(MachOObject &Obj,
const MachOObject::LoadCommandInfo &LCI) {
InMemoryStruct<macho::DysymtabLoadCommand> DLC;
Obj.ReadDysymtabLoadCommand(LCI, DLC);
if (!DLC)
return Error("unable to read segment load command");
outs() << " ('ilocalsym', " << DLC->LocalSymbolsIndex << ")\n";
outs() << " ('nlocalsym', " << DLC->NumLocalSymbols << ")\n";
outs() << " ('iextdefsym', " << DLC->ExternalSymbolsIndex << ")\n";
outs() << " ('nextdefsym', " << DLC->NumExternalSymbols << ")\n";
outs() << " ('iundefsym', " << DLC->UndefinedSymbolsIndex << ")\n";
outs() << " ('nundefsym', " << DLC->NumUndefinedSymbols << ")\n";
outs() << " ('tocoff', " << DLC->TOCOffset << ")\n";
outs() << " ('ntoc', " << DLC->NumTOCEntries << ")\n";
outs() << " ('modtaboff', " << DLC->ModuleTableOffset << ")\n";
outs() << " ('nmodtab', " << DLC->NumModuleTableEntries << ")\n";
outs() << " ('extrefsymoff', " << DLC->ReferenceSymbolTableOffset << ")\n";
outs() << " ('nextrefsyms', "
<< DLC->NumReferencedSymbolTableEntries << ")\n";
outs() << " ('indirectsymoff', " << DLC->IndirectSymbolTableOffset << ")\n";
outs() << " ('nindirectsyms', "
<< DLC->NumIndirectSymbolTableEntries << ")\n";
outs() << " ('extreloff', " << DLC->ExternalRelocationTableOffset << ")\n";
outs() << " ('nextrel', " << DLC->NumExternalRelocationTableEntries << ")\n";
outs() << " ('locreloff', " << DLC->LocalRelocationTableOffset << ")\n";
outs() << " ('nlocrel', " << DLC->NumLocalRelocationTableEntries << ")\n";
// Dump the indirect symbol table.
int Res = 0;
outs() << " ('_indirect_symbols', [\n";
for (unsigned i = 0; i != DLC->NumIndirectSymbolTableEntries; ++i) {
InMemoryStruct<macho::IndirectSymbolTableEntry> ISTE;
Obj.ReadIndirectSymbolTableEntry(*DLC, i, ISTE);
if (!ISTE) {
Res = Error("unable to read segment load command");
break;
}
outs() << " # Indirect Symbol " << i << "\n";
outs() << " (('symbol_index', "
<< format("0x%x", ISTE->Index) << "),),\n";
}
outs() << " ])\n";
return Res;
}
static int DumpLinkeditDataCommand(MachOObject &Obj,
const MachOObject::LoadCommandInfo &LCI) {
InMemoryStruct<macho::LinkeditDataLoadCommand> LLC;
Obj.ReadLinkeditDataLoadCommand(LCI, LLC);
if (!LLC)
return Error("unable to read segment load command");
outs() << " ('dataoff', " << LLC->DataOffset << ")\n"
<< " ('datasize', " << LLC->DataSize << ")\n"
<< " ('_addresses', [\n";
SmallVector<uint64_t, 8> Addresses;
Obj.ReadULEB128s(LLC->DataOffset, Addresses);
for (unsigned i = 0, e = Addresses.size(); i != e; ++i)
outs() << " # Address " << i << '\n'
<< " ('address', " << format("0x%x", Addresses[i]) << "),\n";
outs() << " ])\n";
return 0;
}
static int DumpLoadCommand(MachOObject &Obj, unsigned Index) {
const MachOObject::LoadCommandInfo &LCI = Obj.getLoadCommandInfo(Index);
int Res = 0;
outs() << " # Load Command " << Index << "\n"
<< " (('command', " << LCI.Command.Type << ")\n"
<< " ('size', " << LCI.Command.Size << ")\n";
switch (LCI.Command.Type) {
case macho::LCT_Segment:
Res = DumpSegmentCommand(Obj, LCI);
break;
case macho::LCT_Segment64:
Res = DumpSegment64Command(Obj, LCI);
break;
case macho::LCT_Symtab:
Res = DumpSymtabCommand(Obj, LCI);
break;
case macho::LCT_Dysymtab:
Res = DumpDysymtabCommand(Obj, LCI);
break;
case macho::LCT_CodeSignature:
case macho::LCT_SegmentSplitInfo:
case macho::LCT_FunctionStarts:
Res = DumpLinkeditDataCommand(Obj, LCI);
break;
default:
Warning("unknown load command: " + Twine(LCI.Command.Type));
break;
}
outs() << " ),\n";
return Res;
}
int main(int argc, char **argv) {
ProgramName = argv[0];
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
cl::ParseCommandLineOptions(argc, argv, "llvm Mach-O dumping tool\n");
// Load the input file.
std::string ErrorStr;
OwningPtr<MemoryBuffer> InputBuffer;
if (error_code ec = MemoryBuffer::getFileOrSTDIN(InputFile, InputBuffer))
return Error("unable to read input: '" + ec.message() + "'");
// Construct the Mach-O wrapper object.
OwningPtr<MachOObject> InputObject(
MachOObject::LoadFromBuffer(InputBuffer.take(), &ErrorStr));
if (!InputObject)
return Error("unable to load object: '" + ErrorStr + "'");
// Print the header
InputObject->printHeader(outs());
// Print the load commands.
int Res = 0;
outs() << "('load_commands', [\n";
for (unsigned i = 0; i != InputObject->getHeader().NumLoadCommands; ++i)
if ((Res = DumpLoadCommand(*InputObject, i)))
break;
outs() << "])\n";
return Res;
}
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