Initial import of the Apple clang-425.0.24 branch

lib/Object/ObjectFile.cpp

@@ -0,0 +1,64 @@
+//===- ObjectFile.cpp - File format independent object file -----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines a file format independent ObjectFile class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/system_error.h"
+
+using namespace llvm;
+using namespace object;
+
+void ObjectFile::anchor() { }
+
+ObjectFile::ObjectFile(unsigned int Type, MemoryBuffer *source, error_code &ec)
+  : Binary(Type, source) {
+}
+
+ObjectFile *ObjectFile::createObjectFile(MemoryBuffer *Object) {
+  if (!Object || Object->getBufferSize() < 64)
+    return 0;
+  sys::LLVMFileType type = sys::IdentifyFileType(Object->getBufferStart(),
+                                static_cast<unsigned>(Object->getBufferSize()));
+  switch (type) {
+    case sys::ELF_Relocatable_FileType:
+    case sys::ELF_Executable_FileType:
+    case sys::ELF_SharedObject_FileType:
+    case sys::ELF_Core_FileType:
+      return createELFObjectFile(Object);
+    case sys::Mach_O_Object_FileType:
+    case sys::Mach_O_Executable_FileType:
+    case sys::Mach_O_FixedVirtualMemorySharedLib_FileType:
+    case sys::Mach_O_Core_FileType:
+    case sys::Mach_O_PreloadExecutable_FileType:
+    case sys::Mach_O_DynamicallyLinkedSharedLib_FileType:
+    case sys::Mach_O_DynamicLinker_FileType:
+    case sys::Mach_O_Bundle_FileType:
+    case sys::Mach_O_DynamicallyLinkedSharedLibStub_FileType:
+    case sys::Mach_O_DSYMCompanion_FileType:
+      return createMachOObjectFile(Object);
+    case sys::COFF_FileType:
+      return createCOFFObjectFile(Object);
+    default:
+      llvm_unreachable("Unknown Object File Type");
+  }
+}
+
+ObjectFile *ObjectFile::createObjectFile(StringRef ObjectPath) {
+  OwningPtr<MemoryBuffer> File;
+  if (MemoryBuffer::getFile(ObjectPath, File))
+    return NULL;
+  return createObjectFile(File.take());
+}