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