mirror of
https://github.com/RPCSX/llvm.git
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efdbec8b0a
None of the object file formats reported error on iterator increment. In retrospect, that is not too surprising: no object format stores symbols or sections in a linked list or other structure that requires chasing pointers. As a consequence, all error checking can be done on begin() and end(). This reduces the text segment of bin/llvm-readobj in my machine from 521233 to 518526 bytes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200442 91177308-0d34-0410-b5e6-96231b3b80d8
416 lines
15 KiB
C++
416 lines
15 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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for (relocation_iterator I = Obj.section_rel_begin(Index),
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E = Obj.section_rel_end(Index);
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I != E; ++I, ++RelNum) {
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MachO::any_relocation_info RE = Obj.getRelocation(I->getRawDataRefImpl());
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outs() << " # Relocation " << RelNum << "\n";
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outs() << " (('word-0', " << format("0x%x", RE.r_word0) << "),\n";
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outs() << " ('word-1', " << format("0x%x", RE.r_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::segment_command SLC = Obj.getSegmentLoadCommand(LCI);
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DumpSegmentCommandData(StringRef(SLC.segname, 16), SLC.vmaddr,
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SLC.vmsize, SLC.fileoff, SLC.filesize,
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SLC.maxprot, SLC.initprot, SLC.nsects, 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.nsects; ++i) {
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MachO::section Sect = Obj.getSection(LCI, i);
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DumpSectionData(Obj, i, StringRef(Sect.sectname, 16),
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StringRef(Sect.segname, 16), Sect.addr,
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Sect.size, Sect.offset, Sect.align,
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Sect.reloff, Sect.nreloc, 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::segment_command_64 SLC = Obj.getSegment64LoadCommand(LCI);
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DumpSegmentCommandData(StringRef(SLC.segname, 16), SLC.vmaddr,
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SLC.vmsize, SLC.fileoff, SLC.filesize,
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SLC.maxprot, SLC.initprot, SLC.nsects, 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.nsects; ++i) {
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MachO::section_64 Sect = Obj.getSection64(LCI, i);
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DumpSectionData(Obj, i, StringRef(Sect.sectname, 16),
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StringRef(Sect.segname, 16), Sect.addr,
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Sect.size, Sect.offset, Sect.align,
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Sect.reloff, Sect.nreloc, 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::symtab_command SLC = Obj.getSymtabLoadCommand();
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outs() << " ('symoff', " << SLC.symoff << ")\n";
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outs() << " ('nsyms', " << SLC.nsyms << ")\n";
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outs() << " ('stroff', " << SLC.stroff << ")\n";
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outs() << " ('strsize', " << SLC.strsize << ")\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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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, ++SymNum) {
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DataRefImpl DRI = I->getRawDataRefImpl();
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if (Obj.is64Bit()) {
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MachO::nlist_64 STE = Obj.getSymbol64TableEntry(DRI);
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DumpSymbolTableEntryData(Obj, SymNum, STE.n_strx, STE.n_type,
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STE.n_sect, STE.n_desc, STE.n_value,
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StringTable);
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} else {
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MachO::nlist STE = Obj.getSymbolTableEntry(DRI);
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DumpSymbolTableEntryData(Obj, SymNum, STE.n_strx, STE.n_type,
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STE.n_sect, STE.n_desc, STE.n_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::dysymtab_command DLC = Obj.getDysymtabLoadCommand();
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outs() << " ('ilocalsym', " << DLC.ilocalsym << ")\n";
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outs() << " ('nlocalsym', " << DLC.nlocalsym << ")\n";
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outs() << " ('iextdefsym', " << DLC.iextdefsym << ")\n";
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outs() << " ('nextdefsym', " << DLC.nextdefsym << ")\n";
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outs() << " ('iundefsym', " << DLC.iundefsym << ")\n";
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outs() << " ('nundefsym', " << DLC.nundefsym << ")\n";
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outs() << " ('tocoff', " << DLC.tocoff << ")\n";
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outs() << " ('ntoc', " << DLC.ntoc << ")\n";
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outs() << " ('modtaboff', " << DLC.modtaboff << ")\n";
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outs() << " ('nmodtab', " << DLC.nmodtab << ")\n";
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outs() << " ('extrefsymoff', " << DLC.extrefsymoff << ")\n";
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outs() << " ('nextrefsyms', " << DLC.nextrefsyms << ")\n";
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outs() << " ('indirectsymoff', " << DLC.indirectsymoff << ")\n";
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outs() << " ('nindirectsyms', " << DLC.nindirectsyms << ")\n";
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outs() << " ('extreloff', " << DLC.extreloff << ")\n";
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outs() << " ('nextrel', " << DLC.nextrel << ")\n";
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outs() << " ('locreloff', " << DLC.locreloff << ")\n";
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outs() << " ('nlocrel', " << DLC.nlocrel << ")\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.nindirectsyms; ++i) {
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uint32_t ISTE = Obj.getIndirectSymbolTableEntry(DLC, i);
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outs() << " # Indirect Symbol " << i << "\n";
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outs() << " (('symbol_index', " << format("0x%x", ISTE) << "),),\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::linkedit_data_command LLC = Obj.getLinkeditDataLoadCommand(LCI);
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outs() << " ('dataoff', " << LLC.dataoff << ")\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.dataoff, 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::linkedit_data_command LLC = Obj.getLinkeditDataLoadCommand(LCI);
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outs() << " ('dataoff', " << LLC.dataoff << ")\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::data_in_code_entry);
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for (unsigned i = 0; i < NumRegions; ++i) {
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MachO::data_in_code_entry DICE= Obj.getDataInCodeTableEntry(LLC.dataoff, 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::linker_options_command 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.cmdsize - sizeof(MachO::linker_options_command);
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const char *P = LCI.Ptr + sizeof(MachO::linker_options_command);
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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.cmd) {
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case MachO::LC_SEGMENT:
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return DumpSegmentCommand(Obj, LCI);
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case MachO::LC_SEGMENT_64:
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return DumpSegment64Command(Obj, LCI);
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case MachO::LC_SYMTAB:
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return DumpSymtabCommand(Obj);
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case MachO::LC_DYSYMTAB:
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return DumpDysymtabCommand(Obj);
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case MachO::LC_CODE_SIGNATURE:
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case MachO::LC_SEGMENT_SPLIT_INFO:
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case MachO::LC_FUNCTION_STARTS:
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return DumpLinkeditDataCommand(Obj, LCI);
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case MachO::LC_DATA_IN_CODE:
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return DumpDataInCodeDataCommand(Obj, LCI);
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case MachO::LC_LINKER_OPTIONS:
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return DumpLinkerOptionsCommand(Obj, LCI);
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default:
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Warning("unknown load command: " + Twine(LCI.C.cmd));
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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.cmd << ")\n"
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<< " ('size', " << LCI.C.cmdsize << ")\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::mach_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.ncmds << ")\n";
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outs() << "('load_commands_size', " << Header.sizeofcmds << ")\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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const MachO::mach_header_64 *Header64 =
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reinterpret_cast<const MachO::mach_header_64 *>(&Header);
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outs() << "('reserved', " << Header64->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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ErrorOr<Binary *> BinaryOrErr = createBinary(InputFile);
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if (error_code EC = BinaryOrErr.getError())
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return Error("unable to read input: '" + EC.message() + "'");
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OwningPtr<Binary> Binary(BinaryOrErr.get());
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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::mach_header_64 Header64;
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MachO::mach_header *Header = reinterpret_cast<MachO::mach_header*>(&Header64);
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if (InputObject->is64Bit())
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Header64 = InputObject->getHeader64();
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else
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*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->ncmds - 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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