Add a MachO-specific "mode" to llvm-objdump, that, if enabled, gathers additional information that are only available on MachO.

- It can take FunctionStarts from a binary to find entry points more accurately.
- Symbol offsets in executables are correct now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140028 91177308-0d34-0410-b5e6-96231b3b80d8

tools/llvm-objdump/llvm-objdump.h

@@ -0,0 +1,47 @@
+//===-- llvm-objdump.h ----------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_OBJDUMP_H
+#define LLVM_OBJDUMP_H
+
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/DataTypes.h"
+#include "llvm/Support/MemoryObject.h"
+
+namespace llvm {
+
+extern cl::opt<std::string> TripleName;
+extern cl::opt<std::string> ArchName;
+
+// Various helper functions.
+void DumpBytes(StringRef bytes);
+void DisassembleInputLibObject(StringRef Filename);
+void DisassembleInputMachO(StringRef Filename);
+
+class StringRefMemoryObject : public MemoryObject {
+private:
+  StringRef Bytes;
+public:
+  StringRefMemoryObject(StringRef bytes) : Bytes(bytes) {}
+
+  uint64_t getBase() const { return 0; }
+  uint64_t getExtent() const { return Bytes.size(); }
+
+  int readByte(uint64_t Addr, uint8_t *Byte) const {
+    if (Addr >= getExtent())
+      return -1;
+    *Byte = Bytes[Addr];
+    return 0;
+  }
+};
+
+}
+
+#endif