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 21 using namespace llvm; 22 using namespace object; 23 24 void ObjectFile::anchor() { } 25 26 ObjectFile::ObjectFile(unsigned int Type, MemoryBuffer *source) 27 : Binary(Type, source) { 28 } 29 30 error_code ObjectFile::getSymbolAlignment(DataRefImpl DRI, 31 uint32_t &Result) const { 32 Result = 0; 33 return object_error::success; 34 } 35 36 section_iterator ObjectFile::getRelocatedSection(DataRefImpl Sec) const { 37 return section_iterator(SectionRef(Sec, this)); 38 } 39 40 ErrorOr<ObjectFile *> ObjectFile::createObjectFile(MemoryBuffer *Object) { 41 OwningPtr<MemoryBuffer> ScopedObj(Object); 42 sys::fs::file_magic Type = sys::fs::identify_magic(Object->getBuffer()); 43 44 switch (Type) { 45 case sys::fs::file_magic::unknown: 46 case sys::fs::file_magic::bitcode: 47 case sys::fs::file_magic::archive: 48 case sys::fs::file_magic::macho_universal_binary: 49 case sys::fs::file_magic::windows_resource: 50 return object_error::invalid_file_type; 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(ScopedObj.take()); 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(ScopedObj.take()); 67 case sys::fs::file_magic::coff_object: 68 case sys::fs::file_magic::coff_import_library: 69 case sys::fs::file_magic::pecoff_executable: 70 return createCOFFObjectFile(ScopedObj.take()); 71 } 72 llvm_unreachable("Unexpected Object File Type"); 73 } 74 75 ErrorOr<ObjectFile *> ObjectFile::createObjectFile(StringRef ObjectPath) { 76 OwningPtr<MemoryBuffer> File; 77 if (error_code EC = MemoryBuffer::getFile(ObjectPath, File)) 78 return EC; 79 return createObjectFile(File.take()); 80 } 81