ObjectFile.cpp revision 9c22f87b1374b06dc6c07f6e8047890e390bbe2d
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/FileSystem.h" 18#include "llvm/Support/MemoryBuffer.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 36section_iterator ObjectFile::getRelocatedSection(DataRefImpl Sec) const { 37 return section_iterator(SectionRef(Sec, this)); 38} 39 40ObjectFile *ObjectFile::createObjectFile(MemoryBuffer *Object) { 41 if (!Object || Object->getBufferSize() < 64) 42 return 0; 43 44 sys::fs::file_magic Type = sys::fs::identify_magic(Object->getBuffer()); 45 switch (Type) { 46 case sys::fs::file_magic::unknown: 47 case sys::fs::file_magic::bitcode: 48 case sys::fs::file_magic::archive: 49 case sys::fs::file_magic::macho_universal_binary: 50 return 0; 51 case sys::fs::file_magic::elf_relocatable: 52 case sys::fs::file_magic::elf_executable: 53 case sys::fs::file_magic::elf_shared_object: 54 case sys::fs::file_magic::elf_core: 55 return createELFObjectFile(Object); 56 case sys::fs::file_magic::macho_object: 57 case sys::fs::file_magic::macho_executable: 58 case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib: 59 case sys::fs::file_magic::macho_core: 60 case sys::fs::file_magic::macho_preload_executable: 61 case sys::fs::file_magic::macho_dynamically_linked_shared_lib: 62 case sys::fs::file_magic::macho_dynamic_linker: 63 case sys::fs::file_magic::macho_bundle: 64 case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub: 65 case sys::fs::file_magic::macho_dsym_companion: 66 return createMachOObjectFile(Object); 67 case sys::fs::file_magic::coff_object: 68 case sys::fs::file_magic::pecoff_executable: 69 return createCOFFObjectFile(Object); 70 } 71 llvm_unreachable("Unexpected Object File Type"); 72} 73 74ObjectFile *ObjectFile::createObjectFile(StringRef ObjectPath) { 75 OwningPtr<MemoryBuffer> File; 76 if (MemoryBuffer::getFile(ObjectPath, File)) 77 return NULL; 78 return createObjectFile(File.take()); 79} 80