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644e3fc29e
from the LC_DATA_IN_CODE load command. And when disassembling print the data in code formatted for the kind of data it and not disassemble those bytes. I added the format specific functionality to the derived class MachOObjectFile since these tables only appears in Mach-O object files. This is my first attempt to modify the libObject stuff so if folks have better suggestions how to fit this in or suggestions on the implementation please let me know. rdar://11791371 llvm-svn: 183424
419 lines
16 KiB
C++
419 lines
16 KiB
C++
//===-- macho-dump.cpp - Mach Object Dumping Tool -------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This is a testing tool for use with the MC/Mach-O LLVM components.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Object/MachO.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/Support/Casting.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Support/system_error.h"
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using namespace llvm;
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using namespace llvm::object;
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static cl::opt<std::string>
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InputFile(cl::Positional, cl::desc("<input file>"), cl::init("-"));
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static cl::opt<bool>
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ShowSectionData("dump-section-data", cl::desc("Dump the contents of sections"),
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cl::init(false));
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///
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static const char *ProgramName;
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static void Message(const char *Type, const Twine &Msg) {
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errs() << ProgramName << ": " << Type << ": " << Msg << "\n";
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}
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static int Error(const Twine &Msg) {
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Message("error", Msg);
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return 1;
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}
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static void Warning(const Twine &Msg) {
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Message("warning", Msg);
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}
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///
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static void DumpSegmentCommandData(StringRef Name,
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uint64_t VMAddr, uint64_t VMSize,
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uint64_t FileOffset, uint64_t FileSize,
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uint32_t MaxProt, uint32_t InitProt,
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uint32_t NumSections, uint32_t Flags) {
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outs() << " ('segment_name', '";
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outs().write_escaped(Name, /*UseHexEscapes=*/true) << "')\n";
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outs() << " ('vm_addr', " << VMAddr << ")\n";
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outs() << " ('vm_size', " << VMSize << ")\n";
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outs() << " ('file_offset', " << FileOffset << ")\n";
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outs() << " ('file_size', " << FileSize << ")\n";
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outs() << " ('maxprot', " << MaxProt << ")\n";
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outs() << " ('initprot', " << InitProt << ")\n";
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outs() << " ('num_sections', " << NumSections << ")\n";
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outs() << " ('flags', " << Flags << ")\n";
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}
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static int DumpSectionData(const MachOObjectFile &Obj, unsigned Index,
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StringRef Name,
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StringRef SegmentName, uint64_t Address,
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uint64_t Size, uint32_t Offset,
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uint32_t Align, uint32_t RelocationTableOffset,
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uint32_t NumRelocationTableEntries,
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uint32_t Flags, uint32_t Reserved1,
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uint32_t Reserved2, uint64_t Reserved3 = ~0ULL) {
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outs() << " # Section " << Index << "\n";
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outs() << " (('section_name', '";
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outs().write_escaped(Name, /*UseHexEscapes=*/true) << "')\n";
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outs() << " ('segment_name', '";
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outs().write_escaped(SegmentName, /*UseHexEscapes=*/true) << "')\n";
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outs() << " ('address', " << Address << ")\n";
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outs() << " ('size', " << Size << ")\n";
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outs() << " ('offset', " << Offset << ")\n";
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outs() << " ('alignment', " << Align << ")\n";
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outs() << " ('reloc_offset', " << RelocationTableOffset << ")\n";
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outs() << " ('num_reloc', " << NumRelocationTableEntries << ")\n";
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outs() << " ('flags', " << format("0x%x", Flags) << ")\n";
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outs() << " ('reserved1', " << Reserved1 << ")\n";
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outs() << " ('reserved2', " << Reserved2 << ")\n";
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if (Reserved3 != ~0ULL)
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outs() << " ('reserved3', " << Reserved3 << ")\n";
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outs() << " ),\n";
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// Dump the relocation entries.
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outs() << " ('_relocations', [\n";
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unsigned RelNum = 0;
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error_code EC;
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for (relocation_iterator I = Obj.getSectionRelBegin(Index),
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E = Obj.getSectionRelEnd(Index); I != E; I.increment(EC), ++RelNum) {
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macho::RelocationEntry RE = Obj.getRelocation(I->getRawDataRefImpl());
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outs() << " # Relocation " << RelNum << "\n";
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outs() << " (('word-0', " << format("0x%x", RE.Word0) << "),\n";
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outs() << " ('word-1', " << format("0x%x", RE.Word1) << ")),\n";
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}
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outs() << " ])\n";
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// Dump the section data, if requested.
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if (ShowSectionData) {
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outs() << " ('_section_data', '";
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StringRef Data = Obj.getData().substr(Offset, Size);
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for (unsigned i = 0; i != Data.size(); ++i) {
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if (i && (i % 4) == 0)
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outs() << ' ';
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outs() << hexdigit((Data[i] >> 4) & 0xF, /*LowerCase=*/true);
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outs() << hexdigit((Data[i] >> 0) & 0xF, /*LowerCase=*/true);
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}
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outs() << "')\n";
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}
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return 0;
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}
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static int DumpSegmentCommand(const MachOObjectFile &Obj,
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const MachOObjectFile::LoadCommandInfo &LCI) {
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macho::SegmentLoadCommand SLC = Obj.getSegmentLoadCommand(LCI);
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DumpSegmentCommandData(StringRef(SLC.Name, 16), SLC.VMAddress,
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SLC.VMSize, SLC.FileOffset, SLC.FileSize,
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SLC.MaxVMProtection, SLC.InitialVMProtection,
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SLC.NumSections, SLC.Flags);
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// Dump the sections.
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outs() << " ('sections', [\n";
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for (unsigned i = 0; i != SLC.NumSections; ++i) {
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macho::Section Sect = Obj.getSection(LCI, i);
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DumpSectionData(Obj, i, StringRef(Sect.Name, 16),
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StringRef(Sect.SegmentName, 16), Sect.Address,
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Sect.Size, Sect.Offset, Sect.Align,
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Sect.RelocationTableOffset,
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Sect.NumRelocationTableEntries, Sect.Flags,
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Sect.Reserved1, Sect.Reserved2);
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}
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outs() << " ])\n";
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return 0;
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}
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static int DumpSegment64Command(const MachOObjectFile &Obj,
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const MachOObjectFile::LoadCommandInfo &LCI) {
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macho::Segment64LoadCommand SLC = Obj.getSegment64LoadCommand(LCI);
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DumpSegmentCommandData(StringRef(SLC.Name, 16), SLC.VMAddress,
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SLC.VMSize, SLC.FileOffset, SLC.FileSize,
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SLC.MaxVMProtection, SLC.InitialVMProtection,
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SLC.NumSections, SLC.Flags);
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// Dump the sections.
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outs() << " ('sections', [\n";
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for (unsigned i = 0; i != SLC.NumSections; ++i) {
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macho::Section64 Sect = Obj.getSection64(LCI, i);
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DumpSectionData(Obj, i, StringRef(Sect.Name, 16),
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StringRef(Sect.SegmentName, 16), Sect.Address,
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Sect.Size, Sect.Offset, Sect.Align,
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Sect.RelocationTableOffset,
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Sect.NumRelocationTableEntries, Sect.Flags,
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Sect.Reserved1, Sect.Reserved2,
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Sect.Reserved3);
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}
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outs() << " ])\n";
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return 0;
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}
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static void DumpSymbolTableEntryData(const MachOObjectFile &Obj,
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unsigned Index, uint32_t StringIndex,
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uint8_t Type, uint8_t SectionIndex,
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uint16_t Flags, uint64_t Value,
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StringRef StringTable) {
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const char *Name = &StringTable.data()[StringIndex];
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outs() << " # Symbol " << Index << "\n";
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outs() << " (('n_strx', " << StringIndex << ")\n";
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outs() << " ('n_type', " << format("0x%x", Type) << ")\n";
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outs() << " ('n_sect', " << uint32_t(SectionIndex) << ")\n";
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outs() << " ('n_desc', " << Flags << ")\n";
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outs() << " ('n_value', " << Value << ")\n";
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outs() << " ('_string', '" << Name << "')\n";
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outs() << " ),\n";
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}
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static int DumpSymtabCommand(const MachOObjectFile &Obj) {
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macho::SymtabLoadCommand SLC = Obj.getSymtabLoadCommand();
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outs() << " ('symoff', " << SLC.SymbolTableOffset << ")\n";
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outs() << " ('nsyms', " << SLC.NumSymbolTableEntries << ")\n";
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outs() << " ('stroff', " << SLC.StringTableOffset << ")\n";
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outs() << " ('strsize', " << SLC.StringTableSize << ")\n";
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// Dump the string data.
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outs() << " ('_string_data', '";
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StringRef StringTable = Obj.getStringTableData();
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outs().write_escaped(StringTable,
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/*UseHexEscapes=*/true) << "')\n";
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// Dump the symbol table.
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outs() << " ('_symbols', [\n";
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error_code EC;
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unsigned SymNum = 0;
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for (symbol_iterator I = Obj.begin_symbols(), E = Obj.end_symbols(); I != E;
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I.increment(EC), ++SymNum) {
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DataRefImpl DRI = I->getRawDataRefImpl();
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if (Obj.is64Bit()) {
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macho::Symbol64TableEntry STE = Obj.getSymbol64TableEntry(DRI);
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DumpSymbolTableEntryData(Obj, SymNum, STE.StringIndex, STE.Type,
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STE.SectionIndex, STE.Flags, STE.Value,
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StringTable);
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} else {
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macho::SymbolTableEntry STE = Obj.getSymbolTableEntry(DRI);
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DumpSymbolTableEntryData(Obj, SymNum, STE.StringIndex, STE.Type,
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STE.SectionIndex, STE.Flags, STE.Value,
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StringTable);
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}
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}
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outs() << " ])\n";
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return 0;
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}
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static int DumpDysymtabCommand(const MachOObjectFile &Obj) {
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macho::DysymtabLoadCommand DLC = Obj.getDysymtabLoadCommand();
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outs() << " ('ilocalsym', " << DLC.LocalSymbolsIndex << ")\n";
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outs() << " ('nlocalsym', " << DLC.NumLocalSymbols << ")\n";
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outs() << " ('iextdefsym', " << DLC.ExternalSymbolsIndex << ")\n";
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outs() << " ('nextdefsym', " << DLC.NumExternalSymbols << ")\n";
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outs() << " ('iundefsym', " << DLC.UndefinedSymbolsIndex << ")\n";
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outs() << " ('nundefsym', " << DLC.NumUndefinedSymbols << ")\n";
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outs() << " ('tocoff', " << DLC.TOCOffset << ")\n";
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outs() << " ('ntoc', " << DLC.NumTOCEntries << ")\n";
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outs() << " ('modtaboff', " << DLC.ModuleTableOffset << ")\n";
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outs() << " ('nmodtab', " << DLC.NumModuleTableEntries << ")\n";
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outs() << " ('extrefsymoff', " << DLC.ReferenceSymbolTableOffset << ")\n";
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outs() << " ('nextrefsyms', "
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<< DLC.NumReferencedSymbolTableEntries << ")\n";
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outs() << " ('indirectsymoff', " << DLC.IndirectSymbolTableOffset << ")\n";
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outs() << " ('nindirectsyms', "
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<< DLC.NumIndirectSymbolTableEntries << ")\n";
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outs() << " ('extreloff', " << DLC.ExternalRelocationTableOffset << ")\n";
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outs() << " ('nextrel', " << DLC.NumExternalRelocationTableEntries << ")\n";
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outs() << " ('locreloff', " << DLC.LocalRelocationTableOffset << ")\n";
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outs() << " ('nlocrel', " << DLC.NumLocalRelocationTableEntries << ")\n";
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// Dump the indirect symbol table.
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outs() << " ('_indirect_symbols', [\n";
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for (unsigned i = 0; i != DLC.NumIndirectSymbolTableEntries; ++i) {
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macho::IndirectSymbolTableEntry ISTE =
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Obj.getIndirectSymbolTableEntry(DLC, i);
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outs() << " # Indirect Symbol " << i << "\n";
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outs() << " (('symbol_index', "
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<< format("0x%x", ISTE.Index) << "),),\n";
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}
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outs() << " ])\n";
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return 0;
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}
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static int
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DumpLinkeditDataCommand(const MachOObjectFile &Obj,
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const MachOObjectFile::LoadCommandInfo &LCI) {
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macho::LinkeditDataLoadCommand LLC = Obj.getLinkeditDataLoadCommand(LCI);
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outs() << " ('dataoff', " << LLC.DataOffset << ")\n"
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<< " ('datasize', " << LLC.DataSize << ")\n"
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<< " ('_addresses', [\n";
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SmallVector<uint64_t, 8> Addresses;
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Obj.ReadULEB128s(LLC.DataOffset, Addresses);
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for (unsigned i = 0, e = Addresses.size(); i != e; ++i)
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outs() << " # Address " << i << '\n'
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<< " ('address', " << format("0x%x", Addresses[i]) << "),\n";
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outs() << " ])\n";
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return 0;
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}
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static int
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DumpDataInCodeDataCommand(const MachOObjectFile &Obj,
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const MachOObjectFile::LoadCommandInfo &LCI) {
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macho::LinkeditDataLoadCommand LLC = Obj.getLinkeditDataLoadCommand(LCI);
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outs() << " ('dataoff', " << LLC.DataOffset << ")\n"
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<< " ('datasize', " << LLC.DataSize << ")\n"
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<< " ('_data_regions', [\n";
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unsigned NumRegions = LLC.DataSize / sizeof(macho::DataInCodeTableEntry);
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for (unsigned i = 0; i < NumRegions; ++i) {
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macho::DataInCodeTableEntry DICE =
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Obj.getDataInCodeTableEntry(LLC.DataOffset, i);
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outs() << " # DICE " << i << "\n"
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<< " ('offset', " << DICE.Offset << ")\n"
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<< " ('length', " << DICE.Length << ")\n"
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<< " ('kind', " << DICE.Kind << ")\n";
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}
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outs() <<" ])\n";
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return 0;
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}
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static int
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DumpLinkerOptionsCommand(const MachOObjectFile &Obj,
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const MachOObjectFile::LoadCommandInfo &LCI) {
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macho::LinkerOptionsLoadCommand LOLC = Obj.getLinkerOptionsLoadCommand(LCI);
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outs() << " ('count', " << LOLC.Count << ")\n"
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<< " ('_strings', [\n";
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uint64_t DataSize = LOLC.Size - sizeof(macho::LinkerOptionsLoadCommand);
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const char *P = LCI.Ptr + sizeof(macho::LinkerOptionsLoadCommand);
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StringRef Data(P, DataSize);
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for (unsigned i = 0; i != LOLC.Count; ++i) {
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std::pair<StringRef,StringRef> Split = Data.split('\0');
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outs() << "\t\"";
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outs().write_escaped(Split.first);
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outs() << "\",\n";
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Data = Split.second;
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}
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outs() <<" ])\n";
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return 0;
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}
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static int DumpLoadCommand(const MachOObjectFile &Obj,
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MachOObjectFile::LoadCommandInfo &LCI) {
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switch (LCI.C.Type) {
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case macho::LCT_Segment:
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return DumpSegmentCommand(Obj, LCI);
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case macho::LCT_Segment64:
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return DumpSegment64Command(Obj, LCI);
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case macho::LCT_Symtab:
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return DumpSymtabCommand(Obj);
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case macho::LCT_Dysymtab:
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return DumpDysymtabCommand(Obj);
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case macho::LCT_CodeSignature:
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case macho::LCT_SegmentSplitInfo:
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case macho::LCT_FunctionStarts:
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return DumpLinkeditDataCommand(Obj, LCI);
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case macho::LCT_DataInCode:
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return DumpDataInCodeDataCommand(Obj, LCI);
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case macho::LCT_LinkerOptions:
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return DumpLinkerOptionsCommand(Obj, LCI);
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default:
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Warning("unknown load command: " + Twine(LCI.C.Type));
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return 0;
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}
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}
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static int DumpLoadCommand(const MachOObjectFile &Obj, unsigned Index,
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MachOObjectFile::LoadCommandInfo &LCI) {
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outs() << " # Load Command " << Index << "\n"
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<< " (('command', " << LCI.C.Type << ")\n"
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<< " ('size', " << LCI.C.Size << ")\n";
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int Res = DumpLoadCommand(Obj, LCI);
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outs() << " ),\n";
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return Res;
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}
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static void printHeader(const MachOObjectFile *Obj,
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const macho::Header &Header) {
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outs() << "('cputype', " << Header.CPUType << ")\n";
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outs() << "('cpusubtype', " << Header.CPUSubtype << ")\n";
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outs() << "('filetype', " << Header.FileType << ")\n";
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outs() << "('num_load_commands', " << Header.NumLoadCommands << ")\n";
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outs() << "('load_commands_size', " << Header.SizeOfLoadCommands << ")\n";
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outs() << "('flag', " << Header.Flags << ")\n";
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// Print extended header if 64-bit.
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if (Obj->is64Bit()) {
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macho::Header64Ext Header64Ext = Obj->getHeader64Ext();
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outs() << "('reserved', " << Header64Ext.Reserved << ")\n";
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}
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}
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int main(int argc, char **argv) {
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ProgramName = argv[0];
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llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
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cl::ParseCommandLineOptions(argc, argv, "llvm Mach-O dumping tool\n");
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OwningPtr<Binary> Binary;
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if (error_code EC = createBinary(InputFile, Binary))
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return Error("unable to read input: '" + EC.message() + "'");
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const MachOObjectFile *InputObject = dyn_cast<MachOObjectFile>(Binary.get());
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if (!InputObject)
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return Error("Not a MachO object");
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// Print the header
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macho::Header Header = InputObject->getHeader();
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printHeader(InputObject, Header);
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// Print the load commands.
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int Res = 0;
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MachOObjectFile::LoadCommandInfo Command =
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InputObject->getFirstLoadCommandInfo();
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outs() << "('load_commands', [\n";
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for (unsigned i = 0; ; ++i) {
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if (DumpLoadCommand(*InputObject, i, Command))
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break;
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if (i == Header.NumLoadCommands - 1)
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break;
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Command = InputObject->getNextLoadCommandInfo(Command);
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}
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outs() << "])\n";
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return Res;
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}
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