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 
25 using namespace llvm;
26 using namespace object;
27 
28 Binary::~Binary() {}
29 
30 Binary::Binary(unsigned int Type, std::unique_ptr<MemoryBuffer> Source)
31     : TypeID(Type), Data(std::move(Source)) {}
32 
33 StringRef Binary::getData() const {
34   return Data->getBuffer();
35 }
36 
37 StringRef Binary::getFileName() const {
38   return Data->getBufferIdentifier();
39 }
40 
41 ErrorOr<std::unique_ptr<Binary>>
42 object::createBinary(std::unique_ptr<MemoryBuffer> Buffer,
43                      LLVMContext *Context) {
44   sys::fs::file_magic Type = sys::fs::identify_magic(Buffer->getBuffer());
45 
46   switch (Type) {
47     case sys::fs::file_magic::archive:
48       return Archive::create(std::move(Buffer));
49     case sys::fs::file_magic::elf_relocatable:
50     case sys::fs::file_magic::elf_executable:
51     case sys::fs::file_magic::elf_shared_object:
52     case sys::fs::file_magic::elf_core:
53     case sys::fs::file_magic::macho_object:
54     case sys::fs::file_magic::macho_executable:
55     case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib:
56     case sys::fs::file_magic::macho_core:
57     case sys::fs::file_magic::macho_preload_executable:
58     case sys::fs::file_magic::macho_dynamically_linked_shared_lib:
59     case sys::fs::file_magic::macho_dynamic_linker:
60     case sys::fs::file_magic::macho_bundle:
61     case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub:
62     case sys::fs::file_magic::macho_dsym_companion:
63     case sys::fs::file_magic::coff_object:
64     case sys::fs::file_magic::coff_import_library:
65     case sys::fs::file_magic::pecoff_executable:
66     case sys::fs::file_magic::bitcode:
67       return ObjectFile::createSymbolicFile(Buffer, Type, Context);
68     case sys::fs::file_magic::macho_universal_binary:
69       return MachOUniversalBinary::create(std::move(Buffer));
70     case sys::fs::file_magic::unknown:
71     case sys::fs::file_magic::windows_resource:
72       // Unrecognized object file format.
73       return object_error::invalid_file_type;
74   }
75   llvm_unreachable("Unexpected Binary File Type");
76 }
77 
78 ErrorOr<std::unique_ptr<Binary>> object::createBinary(StringRef Path) {
79   ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
80       MemoryBuffer::getFileOrSTDIN(Path);
81   if (std::error_code EC = FileOrErr.getError())
82     return EC;
83   return createBinary(std::move(*FileOrErr));
84 }
85