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/MemoryBuffer.h"
17 #include "llvm/Support/FileSystem.h"
18 #include "llvm/Support/Path.h"
19 
20 // Include headers for createBinary.
21 #include "llvm/Object/Archive.h"
22 #include "llvm/Object/COFF.h"
23 #include "llvm/Object/MachOUniversal.h"
24 #include "llvm/Object/ObjectFile.h"
25 
26 using namespace llvm;
27 using namespace object;
28 
29 Binary::~Binary() {
30   delete Data;
31 }
32 
33 Binary::Binary(unsigned int Type, MemoryBuffer *Source)
34   : TypeID(Type)
35   , Data(Source) {}
36 
37 StringRef Binary::getData() const {
38   return Data->getBuffer();
39 }
40 
41 StringRef Binary::getFileName() const {
42   return Data->getBufferIdentifier();
43 }
44 
45 error_code object::createBinary(MemoryBuffer *Source,
46                                 OwningPtr<Binary> &Result) {
47   OwningPtr<MemoryBuffer> scopedSource(Source);
48   if (!Source)
49     return make_error_code(errc::invalid_argument);
50   sys::fs::file_magic type = sys::fs::identify_magic(Source->getBuffer());
51   error_code ec;
52   switch (type) {
53     case sys::fs::file_magic::archive: {
54       OwningPtr<Binary> ret(new Archive(scopedSource.take(), ec));
55       if (ec) return ec;
56       Result.swap(ret);
57       return object_error::success;
58     }
59     case sys::fs::file_magic::elf_relocatable:
60     case sys::fs::file_magic::elf_executable:
61     case sys::fs::file_magic::elf_shared_object:
62     case sys::fs::file_magic::elf_core: {
63       OwningPtr<Binary> ret(
64         ObjectFile::createELFObjectFile(scopedSource.take()));
65       if (!ret)
66         return object_error::invalid_file_type;
67       Result.swap(ret);
68       return object_error::success;
69     }
70     case sys::fs::file_magic::macho_object:
71     case sys::fs::file_magic::macho_executable:
72     case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib:
73     case sys::fs::file_magic::macho_core:
74     case sys::fs::file_magic::macho_preload_executable:
75     case sys::fs::file_magic::macho_dynamically_linked_shared_lib:
76     case sys::fs::file_magic::macho_dynamic_linker:
77     case sys::fs::file_magic::macho_bundle:
78     case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub: {
79       OwningPtr<Binary> ret(
80         ObjectFile::createMachOObjectFile(scopedSource.take()));
81       if (!ret)
82         return object_error::invalid_file_type;
83       Result.swap(ret);
84       return object_error::success;
85     }
86     case sys::fs::file_magic::macho_universal_binary: {
87       OwningPtr<Binary> ret(new MachOUniversalBinary(scopedSource.take(), ec));
88       if (ec) return ec;
89       Result.swap(ret);
90       return object_error::success;
91     }
92     case sys::fs::file_magic::coff_object:
93     case sys::fs::file_magic::pecoff_executable: {
94       OwningPtr<Binary> ret(
95           ObjectFile::createCOFFObjectFile(scopedSource.take()));
96       if (!ret)
97         return object_error::invalid_file_type;
98       Result.swap(ret);
99       return object_error::success;
100     }
101     default: // Unrecognized object file format.
102       return object_error::invalid_file_type;
103   }
104 }
105 
106 error_code object::createBinary(StringRef Path, OwningPtr<Binary> &Result) {
107   OwningPtr<MemoryBuffer> File;
108   if (error_code ec = MemoryBuffer::getFileOrSTDIN(Path, File))
109     return ec;
110   return createBinary(File.take(), Result);
111 }
112