Binary.cpp revision cd81d94322a39503e4a3e87b6ee03d4fcb3465fb 
1//===- Binary.cpp - A generic binary 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 the Binary class.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/Object/Binary.h"
15#include "llvm/ADT/StringRef.h"
16#include "llvm/Support/FileSystem.h"
17#include "llvm/Support/MemoryBuffer.h"
18#include "llvm/Support/Path.h"
19
20// Include headers for createBinary.
21#include "llvm/Object/Archive.h"
22#include "llvm/Object/MachOUniversal.h"
23#include "llvm/Object/ObjectFile.h"
24
25using namespace llvm;
26using namespace object;
27
28Binary::~Binary() {}
29
30Binary::Binary(unsigned int Type, std::unique_ptr<MemoryBuffer> Source)
31    : TypeID(Type), Data(std::move(Source)) {}
32
33StringRef Binary::getData() const {
34  return Data->getBuffer();
35}
36
37StringRef Binary::getFileName() const {
38  return Data->getBufferIdentifier();
39}
40
41ErrorOr<Binary *> object::createBinary(std::unique_ptr<MemoryBuffer> &Buffer,
42                                       LLVMContext *Context) {
43  sys::fs::file_magic Type = sys::fs::identify_magic(Buffer->getBuffer());
44
45  switch (Type) {
46    case sys::fs::file_magic::archive:
47      return Archive::create(std::move(Buffer));
48    case sys::fs::file_magic::elf_relocatable:
49    case sys::fs::file_magic::elf_executable:
50    case sys::fs::file_magic::elf_shared_object:
51    case sys::fs::file_magic::elf_core:
52    case sys::fs::file_magic::macho_object:
53    case sys::fs::file_magic::macho_executable:
54    case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib:
55    case sys::fs::file_magic::macho_core:
56    case sys::fs::file_magic::macho_preload_executable:
57    case sys::fs::file_magic::macho_dynamically_linked_shared_lib:
58    case sys::fs::file_magic::macho_dynamic_linker:
59    case sys::fs::file_magic::macho_bundle:
60    case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub:
61    case sys::fs::file_magic::macho_dsym_companion:
62    case sys::fs::file_magic::coff_object:
63    case sys::fs::file_magic::coff_import_library:
64    case sys::fs::file_magic::pecoff_executable:
65    case sys::fs::file_magic::bitcode:
66      return ObjectFile::createSymbolicFile(Buffer, Type, Context);
67    case sys::fs::file_magic::macho_universal_binary:
68      return MachOUniversalBinary::create(std::move(Buffer));
69    case sys::fs::file_magic::unknown:
70    case sys::fs::file_magic::windows_resource:
71      // Unrecognized object file format.
72      return object_error::invalid_file_type;
73  }
74  llvm_unreachable("Unexpected Binary File Type");
75}
76
77ErrorOr<Binary *> object::createBinary(StringRef Path) {
78  ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
79      MemoryBuffer::getFileOrSTDIN(Path);
80  if (std::error_code EC = FileOrErr.getError())
81    return EC;
82  return createBinary(FileOrErr.get());
83}
84