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/Support/ErrorHandling.h" 16 #include "llvm/Support/FileSystem.h" 17 #include "llvm/Support/MemoryBuffer.h" 18 #include "llvm/Support/raw_ostream.h" 19 #include <system_error> 20 21 using namespace llvm; 22 using namespace object; 23 24 void ObjectFile::anchor() { } 25 26 ObjectFile::ObjectFile(unsigned int Type, MemoryBuffer *Source, 27 bool BufferOwned) 28 : SymbolicFile(Type, Source, BufferOwned) {} 29 30 std::error_code ObjectFile::printSymbolName(raw_ostream &OS, 31 DataRefImpl Symb) const { 32 StringRef Name; 33 if (std::error_code EC = getSymbolName(Symb, Name)) 34 return EC; 35 OS << Name; 36 return object_error::success; 37 } 38 39 std::error_code ObjectFile::getSymbolAlignment(DataRefImpl DRI, 40 uint32_t &Result) const { 41 Result = 0; 42 return object_error::success; 43 } 44 45 section_iterator ObjectFile::getRelocatedSection(DataRefImpl Sec) const { 46 return section_iterator(SectionRef(Sec, this)); 47 } 48 49 ErrorOr<ObjectFile *> ObjectFile::createObjectFile(MemoryBuffer *Object, 50 bool BufferOwned, 51 sys::fs::file_magic Type) { 52 if (Type == sys::fs::file_magic::unknown) 53 Type = sys::fs::identify_magic(Object->getBuffer()); 54 55 switch (Type) { 56 case sys::fs::file_magic::unknown: 57 case sys::fs::file_magic::bitcode: 58 case sys::fs::file_magic::archive: 59 case sys::fs::file_magic::macho_universal_binary: 60 case sys::fs::file_magic::windows_resource: 61 if (BufferOwned) 62 delete Object; 63 return object_error::invalid_file_type; 64 case sys::fs::file_magic::elf_relocatable: 65 case sys::fs::file_magic::elf_executable: 66 case sys::fs::file_magic::elf_shared_object: 67 case sys::fs::file_magic::elf_core: 68 return createELFObjectFile(Object, BufferOwned); 69 case sys::fs::file_magic::macho_object: 70 case sys::fs::file_magic::macho_executable: 71 case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib: 72 case sys::fs::file_magic::macho_core: 73 case sys::fs::file_magic::macho_preload_executable: 74 case sys::fs::file_magic::macho_dynamically_linked_shared_lib: 75 case sys::fs::file_magic::macho_dynamic_linker: 76 case sys::fs::file_magic::macho_bundle: 77 case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub: 78 case sys::fs::file_magic::macho_dsym_companion: 79 return createMachOObjectFile(Object, BufferOwned); 80 case sys::fs::file_magic::coff_object: 81 case sys::fs::file_magic::coff_import_library: 82 case sys::fs::file_magic::pecoff_executable: 83 return createCOFFObjectFile(Object, BufferOwned); 84 } 85 llvm_unreachable("Unexpected Object File Type"); 86 } 87 88 ErrorOr<ObjectFile *> ObjectFile::createObjectFile(StringRef ObjectPath) { 89 std::unique_ptr<MemoryBuffer> File; 90 if (std::error_code EC = MemoryBuffer::getFile(ObjectPath, File)) 91 return EC; 92 return createObjectFile(File.release()); 93 } 94