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/Path.h"
18 
19 // Include headers for createBinary.
20 #include "llvm/Object/ObjectFile.h"
21 #include "llvm/Object/COFF.h"
22 
23 using namespace llvm;
24 using namespace object;
25 
26 Binary::~Binary() {
27   delete Data;
28 }
29 
30 Binary::Binary(unsigned int Type, MemoryBuffer *Source)
31   : TypeID(Type)
32   , Data(Source) {}
33 
34 StringRef Binary::getData() const {
35   return Data->getBuffer();
36 }
37 
38 StringRef Binary::getFileName() const {
39   return Data->getBufferIdentifier();
40 }
41 
42 error_code object::createBinary(MemoryBuffer *Source,
43                                 OwningPtr<Binary> &Result) {
44   OwningPtr<MemoryBuffer> scopedSource(Source);
45   if (!Source)
46     return make_error_code(errc::invalid_argument);
47   if (Source->getBufferSize() < 64)
48     return object_error::invalid_file_type;
49   sys::LLVMFileType type = sys::IdentifyFileType(Source->getBufferStart(),
50                                 static_cast<unsigned>(Source->getBufferSize()));
51   error_code ec;
52   switch (type) {
53     case sys::ELF_Relocatable_FileType:
54     case sys::ELF_Executable_FileType:
55     case sys::ELF_SharedObject_FileType:
56     case sys::ELF_Core_FileType: {
57       OwningPtr<Binary> ret(
58         ObjectFile::createELFObjectFile(scopedSource.take()));
59       if (!ret)
60         return object_error::invalid_file_type;
61       Result.swap(ret);
62       return object_error::success;
63     }
64     case sys::Mach_O_Object_FileType:
65     case sys::Mach_O_Executable_FileType:
66     case sys::Mach_O_FixedVirtualMemorySharedLib_FileType:
67     case sys::Mach_O_Core_FileType:
68     case sys::Mach_O_PreloadExecutable_FileType:
69     case sys::Mach_O_DynamicallyLinkedSharedLib_FileType:
70     case sys::Mach_O_DynamicLinker_FileType:
71     case sys::Mach_O_Bundle_FileType:
72     case sys::Mach_O_DynamicallyLinkedSharedLibStub_FileType: {
73       OwningPtr<Binary> ret(
74         ObjectFile::createMachOObjectFile(scopedSource.take()));
75       if (!ret)
76         return object_error::invalid_file_type;
77       Result.swap(ret);
78       return object_error::success;
79     }
80     case sys::COFF_FileType: {
81       OwningPtr<Binary> ret(new COFFObjectFile(scopedSource.take(), ec));
82       if (ec) return ec;
83       Result.swap(ret);
84       return object_error::success;
85     }
86     default: // Unrecognized object file format.
87       return object_error::invalid_file_type;
88   }
89 }
90 
91 error_code object::createBinary(StringRef Path, OwningPtr<Binary> &Result) {
92   OwningPtr<MemoryBuffer> File;
93   if (error_code ec = MemoryBuffer::getFile(Path, File))
94     return ec;
95   return createBinary(File.take(), Result);
96 }
97