1 //===-- macho-dump.cpp - Mach Object Dumping Tool -------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This is a testing tool for use with the MC/Mach-O LLVM components.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Object/MachOObject.h"
15 #include "llvm/ADT/Twine.h"
16 #include "llvm/Support/CommandLine.h"
17 #include "llvm/Support/ManagedStatic.h"
18 #include "llvm/Support/MemoryBuffer.h"
19 #include "llvm/Support/raw_ostream.h"
21 using namespace llvm::object;
23 static cl::opt<std::string>
24 InputFile(cl::Positional, cl::desc("<input file>"), cl::init("-"));
27 DumpSectionData("dump-section-data", cl::desc("Dump the contents of sections"),
32 static const char *ProgramName;
34 static void Message(const char *Type, const Twine &Msg) {
35 errs() << ProgramName << ": " << Type << ": " << Msg << "\n";
38 static int Error(const Twine &Msg) {
39 Message("error", Msg);
43 static void Warning(const Twine &Msg) {
44 Message("warning", Msg);
49 static int DumpHeader(MachOObject &Obj) {
51 const macho::Header &Hdr = Obj.getHeader();
52 outs() << "('cputype', " << Hdr.CPUType << ")\n";
53 outs() << "('cpusubtype', " << Hdr.CPUSubtype << ")\n";
54 outs() << "('filetype', " << Hdr.FileType << ")\n";
55 outs() << "('num_load_commands', " << Hdr.NumLoadCommands << ")\n";
56 outs() << "('load_commands_size', " << Hdr.SizeOfLoadCommands << ")\n";
57 outs() << "('flag', " << Hdr.Flags << ")\n";
59 // Print extended header if 64-bit.
61 const macho::Header64Ext &Hdr64 = Obj.getHeader64Ext();
62 outs() << "('reserved', " << Hdr64.Reserved << ")\n";
68 static void DumpSegmentCommandData(StringRef Name,
69 uint64_t VMAddr, uint64_t VMSize,
70 uint64_t FileOffset, uint64_t FileSize,
71 uint32_t MaxProt, uint32_t InitProt,
72 uint32_t NumSections, uint32_t Flags) {
73 outs() << " ('segment_name', '";
74 outs().write_escaped(Name, /*UseHexEscapes=*/true) << "')\n";
75 outs() << " ('vm_addr', " << VMAddr << ")\n";
76 outs() << " ('vm_size', " << VMSize << ")\n";
77 outs() << " ('file_offset', " << FileOffset << ")\n";
78 outs() << " ('file_size', " << FileSize << ")\n";
79 outs() << " ('maxprot', " << MaxProt << ")\n";
80 outs() << " ('initprot', " << InitProt << ")\n";
81 outs() << " ('num_sections', " << NumSections << ")\n";
82 outs() << " ('flags', " << Flags << ")\n";
85 static int DumpSegmentCommand(MachOObject &Obj,
86 const MachOObject::LoadCommandInfo &LCI) {
87 InMemoryStruct<macho::SegmentLoadCommand> SLC;
88 Obj.ReadSegmentLoadCommand(LCI, SLC);
90 return Error("unable to read segment load command");
92 DumpSegmentCommandData(StringRef(SLC->Name, 16), SLC->VMAddress, SLC->VMSize,
93 SLC->FileOffset, SLC->FileSize,
94 SLC->MaxVMProtection, SLC->InitialVMProtection,
95 SLC->NumSections, SLC->Flags);
99 static int DumpSegment64Command(MachOObject &Obj,
100 const MachOObject::LoadCommandInfo &LCI) {
101 InMemoryStruct<macho::Segment64LoadCommand> SLC;
102 Obj.ReadSegment64LoadCommand(LCI, SLC);
104 return Error("unable to read segment load command");
106 DumpSegmentCommandData(StringRef(SLC->Name, 16), SLC->VMAddress, SLC->VMSize,
107 SLC->FileOffset, SLC->FileSize,
108 SLC->MaxVMProtection, SLC->InitialVMProtection,
109 SLC->NumSections, SLC->Flags);
114 static int DumpLoadCommand(MachOObject &Obj, unsigned Index) {
115 const MachOObject::LoadCommandInfo &LCI = Obj.getLoadCommandInfo(Index);
118 outs() << " # Load Command " << Index << "\n"
119 << " (('command', " << LCI.Command.Type << ")\n"
120 << " ('size', " << LCI.Command.Size << ")\n";
121 switch (LCI.Command.Type) {
122 case macho::LCT_Segment:
123 Res = DumpSegmentCommand(Obj, LCI);
125 case macho::LCT_Segment64:
126 Res = DumpSegment64Command(Obj, LCI);
129 Warning("unknown load command: " + Twine(LCI.Command.Type));
137 int main(int argc, char **argv) {
138 ProgramName = argv[0];
139 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
141 cl::ParseCommandLineOptions(argc, argv, "llvm Mach-O dumping tool\n");
143 // Load the input file.
144 std::string ErrorStr;
145 OwningPtr<MemoryBuffer> InputBuffer(
146 MemoryBuffer::getFileOrSTDIN(InputFile, &ErrorStr));
148 return Error("unable to read input: '" + ErrorStr + "'");
150 // Construct the Mach-O wrapper object.
151 OwningPtr<MachOObject> InputObject(
152 MachOObject::LoadFromBuffer(InputBuffer.take(), &ErrorStr));
154 return Error("unable to load object: '" + ErrorStr + "'");
156 if (int Res = DumpHeader(*InputObject))
159 // Print the load commands.
161 outs() << "('load_commands', [\n";
162 for (unsigned i = 0; i != InputObject->getHeader().NumLoadCommands; ++i)
163 if ((Res = DumpLoadCommand(*InputObject, i)))