Add ELF ObjectWriter and Streamer support.

I forgot to add these files in commit 111172.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111174 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/MC/ELFObjectWriter.h

@@ -0,0 +1,46 @@
+//===-- llvm/MC/ELFObjectWriter.h - ELF File Writer ---------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_MC_ELFOBJECTWRITER_H
+#define LLVM_MC_ELFOBJECTWRITER_H
+
+#include "llvm/MC/MCObjectWriter.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cassert>
+
+namespace llvm {
+class MCAsmFixup;
+class MCAssembler;
+class MCFragment;
+class MCValue;
+class raw_ostream;
+
+class ELFObjectWriter : public MCObjectWriter {
+  void *Impl;
+
+public:
+  ELFObjectWriter(raw_ostream &OS, bool Is64Bit, bool IsLittleEndian = true,
+                  bool HasRelocationAddend = true);
+
+  virtual ~ELFObjectWriter();
+
+  virtual void ExecutePostLayoutBinding(MCAssembler &Asm);
+
+  virtual void RecordRelocation(const MCAssembler &Asm,
+                                const MCAsmLayout &Layout,
+                                const MCFragment *Fragment,
+                                const MCFixup &Fixup, MCValue Target,
+                                uint64_t &FixedValue);
+
+  virtual void WriteObject(const MCAssembler &Asm, const MCAsmLayout &Layout);
+};
+
+} // End llvm namespace
+
+#endif