From a956d8b71755b908d8a150736e8857d2214060c6 Mon Sep 17 00:00:00 2001
From: Daniel Dunbar <daniel@zuster.org>
Date: Sat, 27 Nov 2010 07:19:41 +0000
Subject: Object/Mach-O: Add header and load command information.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120198 91177308-0d34-0410-b5e6-96231b3b80d8
---
 tools/macho-dump/macho-dump.cpp | 81 +++++++++++++++++++++++++++++++++++------
 1 file changed, 69 insertions(+), 12 deletions(-)

(limited to 'tools/macho-dump')

diff --git a/tools/macho-dump/macho-dump.cpp b/tools/macho-dump/macho-dump.cpp
index 945406a501..8bfd1890c6 100644
--- a/tools/macho-dump/macho-dump.cpp
+++ b/tools/macho-dump/macho-dump.cpp
@@ -12,6 +12,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Object/MachOObject.h"
+#include "llvm/ADT/Twine.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/MemoryBuffer.h"
@@ -26,8 +27,62 @@ static cl::opt<bool>
 DumpSectionData("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 int DumpHeader(MachOObject &Obj) {
+  // Read the header.
+  const macho::Header &Hdr = Obj.getHeader();
+  outs() << "('cputype', " << Hdr.CPUType << ")\n";
+  outs() << "('cpusubtype', " << Hdr.CPUSubtype << ")\n";
+  outs() << "('filetype', " << Hdr.FileType << ")\n";
+  outs() << "('num_load_commands', " << Hdr.NumLoadCommands << ")\n";
+  outs() << "('load_commands_size', " << Hdr.SizeOfLoadCommands << ")\n";
+  outs() << "('flag', " << Hdr.Flags << ")\n";
+
+  // Print extended header if 64-bit.
+  if (Obj.is64Bit()) {
+    const macho::Header64Ext &Hdr64 = Obj.getHeader64Ext();
+    outs() << "('reserved', " << Hdr64.Reserved << ")\n";
+  }
+
+  return 0;
+}
+
+static int DumpLoadCommand(MachOObject &Obj, unsigned Index) {
+  const MachOObject::LoadCommandInfo &LCI = Obj.getLoadCommandInfo(Index);
+
+  outs() << "  # Load Command " << Index << "\n"
+         << " (('command', " << LCI.Command.Type << ")\n"
+         << "  ('size', " << LCI.Command.Size << ")\n";
+  switch (LCI.Command.Type) {
+  default:
+    Warning("unknown load command: " + Twine(LCI.Command.Type));
+    break;
+  }
+  outs() << " ),\n";
+
+  return 0;
+}
+
 int main(int argc, char **argv) {
-  const char *ProgramName = argv[0];
+  ProgramName = argv[0];
   llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
 
   cl::ParseCommandLineOptions(argc, argv, "llvm Mach-O dumping tool\n");
@@ -36,21 +91,23 @@ int main(int argc, char **argv) {
   std::string ErrorStr;
   OwningPtr<MemoryBuffer> InputBuffer(
     MemoryBuffer::getFileOrSTDIN(InputFile, &ErrorStr));
-  if (!InputBuffer) {
-    errs() << ProgramName << ": " << "unable to read input: '"
-           << ErrorStr << "'\n";
-    return 1;
-  }
+  if (!InputBuffer)
+    return Error("unable to read input: '" + ErrorStr + "'");
 
   // Construct the Mach-O wrapper object.
   OwningPtr<MachOObject> InputObject(
     MachOObject::LoadFromBuffer(InputBuffer.take(), &ErrorStr));
-  if (!InputObject) {
-    errs() << ProgramName << ": " << "unable to load object: '"
-           << ErrorStr << "'\n";
-    return 1;
-  }
+  if (!InputObject)
+    return Error("unable to load object: '" + ErrorStr + "'");
+
+  if (int Res = DumpHeader(*InputObject))
+    return Res;
+
+  // Print the load commands.
+  outs() << "('load_commands', [\n";
+  for (unsigned i = 0; i != InputObject->getHeader().NumLoadCommands; ++i)
+    DumpLoadCommand(*InputObject, i);
+  outs() << "])\n";
 
-  errs() << "ok\n";
   return 0;
 }
-- 
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