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/COFF.h" 15 #include "llvm/Object/MachO.h" 16 #include "llvm/Object/ObjectFile.h" 17 #include "llvm/Support/ErrorHandling.h" 18 #include "llvm/Support/FileSystem.h" 19 #include "llvm/Support/MemoryBuffer.h" 20 #include "llvm/Support/raw_ostream.h" 21 #include <system_error> 22 23 using namespace llvm; 24 using namespace object; 25 26 void ObjectFile::anchor() { } 27 28 ObjectFile::ObjectFile(unsigned int Type, MemoryBufferRef Source) 29 : SymbolicFile(Type, Source) {} 30 31 std::error_code ObjectFile::printSymbolName(raw_ostream &OS, 32 DataRefImpl Symb) const { 33 StringRef Name; 34 if (std::error_code EC = getSymbolName(Symb, Name)) 35 return EC; 36 OS << Name; 37 return object_error::success; 38 } 39 40 std::error_code ObjectFile::getSymbolAlignment(DataRefImpl DRI, 41 uint32_t &Result) const { 42 Result = 0; 43 return object_error::success; 44 } 45 46 section_iterator ObjectFile::getRelocatedSection(DataRefImpl Sec) const { 47 return section_iterator(SectionRef(Sec, this)); 48 } 49 50 ErrorOr<std::unique_ptr<ObjectFile>> 51 ObjectFile::createObjectFile(MemoryBufferRef Object, sys::fs::file_magic Type) { 52 StringRef Data = Object.getBuffer(); 53 if (Type == sys::fs::file_magic::unknown) 54 Type = sys::fs::identify_magic(Data); 55 56 switch (Type) { 57 case sys::fs::file_magic::unknown: 58 case sys::fs::file_magic::bitcode: 59 case sys::fs::file_magic::archive: 60 case sys::fs::file_magic::macho_universal_binary: 61 case sys::fs::file_magic::windows_resource: 62 return object_error::invalid_file_type; 63 case sys::fs::file_magic::elf: 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); 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 case sys::fs::file_magic::macho_kext_bundle: 80 return createMachOObjectFile(Object); 81 case sys::fs::file_magic::coff_object: 82 case sys::fs::file_magic::coff_import_library: 83 case sys::fs::file_magic::pecoff_executable: 84 return createCOFFObjectFile(Object); 85 } 86 llvm_unreachable("Unexpected Object File Type"); 87 } 88 89 ErrorOr<OwningBinary<ObjectFile>> 90 ObjectFile::createObjectFile(StringRef ObjectPath) { 91 ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr = 92 MemoryBuffer::getFile(ObjectPath); 93 if (std::error_code EC = FileOrErr.getError()) 94 return EC; 95 std::unique_ptr<MemoryBuffer> Buffer = std::move(FileOrErr.get()); 96 97 ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr = 98 createObjectFile(Buffer->getMemBufferRef()); 99 if (std::error_code EC = ObjOrErr.getError()) 100 return EC; 101 std::unique_ptr<ObjectFile> Obj = std::move(ObjOrErr.get()); 102 103 return OwningBinary<ObjectFile>(std::move(Obj), std::move(Buffer)); 104 } 105
