1 //===- ObjectFile.cpp - File format independent object file -----*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines a file format independent ObjectFile class.
12 //===----------------------------------------------------------------------===//
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>
24 using namespace object;
26 void ObjectFile::anchor() { }
28 ObjectFile::ObjectFile(unsigned int Type, MemoryBufferRef Source)
29 : SymbolicFile(Type, Source) {}
31 std::error_code ObjectFile::printSymbolName(raw_ostream &OS,
32 DataRefImpl Symb) const {
34 if (std::error_code EC = getSymbolName(Symb, Name))
37 return std::error_code();
40 uint32_t ObjectFile::getSymbolAlignment(DataRefImpl DRI) const { return 0; }
42 section_iterator ObjectFile::getRelocatedSection(DataRefImpl Sec) const {
43 return section_iterator(SectionRef(Sec, this));
46 ErrorOr<std::unique_ptr<ObjectFile>>
47 ObjectFile::createObjectFile(MemoryBufferRef Object, sys::fs::file_magic Type) {
48 StringRef Data = Object.getBuffer();
49 if (Type == sys::fs::file_magic::unknown)
50 Type = sys::fs::identify_magic(Data);
53 case sys::fs::file_magic::unknown:
54 case sys::fs::file_magic::bitcode:
55 case sys::fs::file_magic::archive:
56 case sys::fs::file_magic::macho_universal_binary:
57 case sys::fs::file_magic::windows_resource:
58 return object_error::invalid_file_type;
59 case sys::fs::file_magic::elf:
60 case sys::fs::file_magic::elf_relocatable:
61 case sys::fs::file_magic::elf_executable:
62 case sys::fs::file_magic::elf_shared_object:
63 case sys::fs::file_magic::elf_core:
64 return createELFObjectFile(Object);
65 case sys::fs::file_magic::macho_object:
66 case sys::fs::file_magic::macho_executable:
67 case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib:
68 case sys::fs::file_magic::macho_core:
69 case sys::fs::file_magic::macho_preload_executable:
70 case sys::fs::file_magic::macho_dynamically_linked_shared_lib:
71 case sys::fs::file_magic::macho_dynamic_linker:
72 case sys::fs::file_magic::macho_bundle:
73 case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub:
74 case sys::fs::file_magic::macho_dsym_companion:
75 case sys::fs::file_magic::macho_kext_bundle:
76 return createMachOObjectFile(Object);
77 case sys::fs::file_magic::coff_object:
78 case sys::fs::file_magic::coff_import_library:
79 case sys::fs::file_magic::pecoff_executable:
80 return createCOFFObjectFile(Object);
82 llvm_unreachable("Unexpected Object File Type");
85 ErrorOr<OwningBinary<ObjectFile>>
86 ObjectFile::createObjectFile(StringRef ObjectPath) {
87 ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
88 MemoryBuffer::getFile(ObjectPath);
89 if (std::error_code EC = FileOrErr.getError())
91 std::unique_ptr<MemoryBuffer> Buffer = std::move(FileOrErr.get());
93 ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr =
94 createObjectFile(Buffer->getMemBufferRef());
95 if (std::error_code EC = ObjOrErr.getError())
97 std::unique_ptr<ObjectFile> Obj = std::move(ObjOrErr.get());
99 return OwningBinary<ObjectFile>(std::move(Obj), std::move(Buffer));