ObjectFile.cpp revision 59a0e79631ed851d98cf9c2ba6fa5f9aafdfdc93
1//===- ObjectFile.cpp - File format independent object file -----*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines a file format independent ObjectFile class. 11// 12//===----------------------------------------------------------------------===// 13 14#include "llvm/Object/ObjectFile.h" 15#include "llvm/ADT/OwningPtr.h" 16#include "llvm/Support/ErrorHandling.h" 17#include "llvm/Support/MemoryBuffer.h" 18#include "llvm/Support/Path.h" 19#include "llvm/Support/system_error.h" 20 21using namespace llvm; 22using namespace object; 23 24void ObjectFile::anchor() { } 25 26ObjectFile::ObjectFile(unsigned int Type, MemoryBuffer *source) 27 : Binary(Type, source) { 28} 29 30error_code ObjectFile::getSymbolAlignment(DataRefImpl DRI, 31 uint32_t &Result) const { 32 Result = 0; 33 return object_error::success; 34} 35 36ObjectFile *ObjectFile::createObjectFile(MemoryBuffer *Object) { 37 if (!Object || Object->getBufferSize() < 64) 38 return 0; 39 sys::LLVMFileType type = sys::IdentifyFileType(Object->getBufferStart(), 40 static_cast<unsigned>(Object->getBufferSize())); 41 switch (type) { 42 case sys::Unknown_FileType: 43 return 0; 44 case sys::ELF_Relocatable_FileType: 45 case sys::ELF_Executable_FileType: 46 case sys::ELF_SharedObject_FileType: 47 case sys::ELF_Core_FileType: 48 return createELFObjectFile(Object); 49 case sys::Mach_O_Object_FileType: 50 case sys::Mach_O_Executable_FileType: 51 case sys::Mach_O_FixedVirtualMemorySharedLib_FileType: 52 case sys::Mach_O_Core_FileType: 53 case sys::Mach_O_PreloadExecutable_FileType: 54 case sys::Mach_O_DynamicallyLinkedSharedLib_FileType: 55 case sys::Mach_O_DynamicLinker_FileType: 56 case sys::Mach_O_Bundle_FileType: 57 case sys::Mach_O_DynamicallyLinkedSharedLibStub_FileType: 58 case sys::Mach_O_DSYMCompanion_FileType: 59 return createMachOObjectFile(Object); 60 case sys::COFF_FileType: 61 return createCOFFObjectFile(Object); 62 default: 63 llvm_unreachable("Unexpected Object File Type"); 64 } 65} 66 67ObjectFile *ObjectFile::createObjectFile(StringRef ObjectPath) { 68 OwningPtr<MemoryBuffer> File; 69 if (MemoryBuffer::getFile(ObjectPath, File)) 70 return NULL; 71 return createObjectFile(File.take()); 72} 73