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/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"
22 using namespace object;
24 void ObjectFile::anchor() { }
26 ObjectFile::ObjectFile(unsigned int Type, MemoryBuffer *source)
27 : Binary(Type, source) {
30 error_code ObjectFile::getSymbolAlignment(DataRefImpl DRI,
31 uint32_t &Result) const {
33 return object_error::success;
36 section_iterator ObjectFile::getRelocatedSection(DataRefImpl Sec) const {
37 return section_iterator(SectionRef(Sec, this));
40 ObjectFile *ObjectFile::createObjectFile(MemoryBuffer *Object) {
41 if (!Object || Object->getBufferSize() < 64)
44 sys::fs::file_magic Type = sys::fs::identify_magic(Object->getBuffer());
46 case sys::fs::file_magic::unknown:
47 case sys::fs::file_magic::bitcode:
48 case sys::fs::file_magic::archive:
50 case sys::fs::file_magic::elf_relocatable:
51 case sys::fs::file_magic::elf_executable:
52 case sys::fs::file_magic::elf_shared_object:
53 case sys::fs::file_magic::elf_core:
54 return createELFObjectFile(Object);
55 case sys::fs::file_magic::macho_object:
56 case sys::fs::file_magic::macho_executable:
57 case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib:
58 case sys::fs::file_magic::macho_core:
59 case sys::fs::file_magic::macho_preload_executable:
60 case sys::fs::file_magic::macho_dynamically_linked_shared_lib:
61 case sys::fs::file_magic::macho_dynamic_linker:
62 case sys::fs::file_magic::macho_bundle:
63 case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub:
64 case sys::fs::file_magic::macho_dsym_companion:
65 return createMachOObjectFile(Object);
66 case sys::fs::file_magic::coff_object:
67 case sys::fs::file_magic::pecoff_executable:
68 return createCOFFObjectFile(Object);
70 llvm_unreachable("Unexpected Object File Type");
73 ObjectFile *ObjectFile::createObjectFile(StringRef ObjectPath) {
74 OwningPtr<MemoryBuffer> File;
75 if (MemoryBuffer::getFile(ObjectPath, File))
77 return createObjectFile(File.take());