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, MemoryBufferRef Source)
31    : TypeID(Type), Data(Source) {}
32
33StringRef Binary::getData() const { return Data.getBuffer(); }
34
35StringRef Binary::getFileName() const { return Data.getBufferIdentifier(); }
36
37MemoryBufferRef Binary::getMemoryBufferRef() const { return Data; }
38
39Expected<std::unique_ptr<Binary>> object::createBinary(MemoryBufferRef Buffer,
40                                                      LLVMContext *Context) {
41  sys::fs::file_magic Type = sys::fs::identify_magic(Buffer.getBuffer());
42
43  switch (Type) {
44    case sys::fs::file_magic::archive:
45      return Archive::create(Buffer);
46    case sys::fs::file_magic::elf:
47    case sys::fs::file_magic::elf_relocatable:
48    case sys::fs::file_magic::elf_executable:
49    case sys::fs::file_magic::elf_shared_object:
50    case sys::fs::file_magic::elf_core:
51    case sys::fs::file_magic::macho_object:
52    case sys::fs::file_magic::macho_executable:
53    case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib:
54    case sys::fs::file_magic::macho_core:
55    case sys::fs::file_magic::macho_preload_executable:
56    case sys::fs::file_magic::macho_dynamically_linked_shared_lib:
57    case sys::fs::file_magic::macho_dynamic_linker:
58    case sys::fs::file_magic::macho_bundle:
59    case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub:
60    case sys::fs::file_magic::macho_dsym_companion:
61    case sys::fs::file_magic::macho_kext_bundle:
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(Buffer);
69    case sys::fs::file_magic::unknown:
70    case sys::fs::file_magic::windows_resource:
71      // Unrecognized object file format.
72      return errorCodeToError(object_error::invalid_file_type);
73  }
74  llvm_unreachable("Unexpected Binary File Type");
75}
76
77Expected<OwningBinary<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 errorCodeToError(EC);
82  std::unique_ptr<MemoryBuffer> &Buffer = FileOrErr.get();
83
84  Expected<std::unique_ptr<Binary>> BinOrErr =
85      createBinary(Buffer->getMemBufferRef());
86  if (!BinOrErr)
87    return BinOrErr.takeError();
88  std::unique_ptr<Binary> &Bin = BinOrErr.get();
89
90  return OwningBinary<Binary>(std::move(Bin), std::move(Buffer));
91}
92