Subzero: Add basic ELFObjectWriter (text section, symtab, strtab, headers)

src/IceMemoryRegion.cpp

-//===- subzero/src/IceMemoryRegion.cpp - Memory region --------------------===//
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-//
-// Modified by the Subzero authors.
-//
-//===----------------------------------------------------------------------===//
-//
-//                        The Subzero Code Generator
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file defines the MemoryRegion class. It tracks a pointer plus its
-// bounds for bounds-checking in debug mode.
-//===----------------------------------------------------------------------===//
-
-#include "IceMemoryRegion.h"
-
-namespace Ice {
-
-void MemoryRegion::CopyFrom(uintptr_t offset, const MemoryRegion &from) const {
-  assert(from.pointer() != NULL && from.size() > 0);
-  assert(this->size() >= from.size());
-  assert(offset <= this->size() - from.size());
-  memmove(reinterpret_cast<void *>(start() + offset), from.pointer(),
-          from.size());
-}
-
-} // end of namespace Ice