1 //===- Binary.cpp - A generic binary file ---------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file defines the Binary class.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "llvm/Object/Binary.h"
14 #include "llvm/ADT/StringRef.h"
15 #include "llvm/BinaryFormat/Magic.h"
16 #include "llvm/Object/Archive.h"
17 #include "llvm/Object/Error.h"
18 #include "llvm/Object/MachOUniversal.h"
19 #include "llvm/Object/Minidump.h"
20 #include "llvm/Object/ObjectFile.h"
21 #include "llvm/Object/WindowsResource.h"
22 #include "llvm/Support/Error.h"
23 #include "llvm/Support/ErrorHandling.h"
24 #include "llvm/Support/ErrorOr.h"
25 #include "llvm/Support/FileSystem.h"
26 #include "llvm/Support/MemoryBuffer.h"
27 #include <algorithm>
28 #include <memory>
29 #include <system_error>
30 
31 using namespace llvm;
32 using namespace object;
33 
34 Binary::~Binary() = default;
35 
36 Binary::Binary(unsigned int Type, MemoryBufferRef Source)
37     : TypeID(Type), Data(Source) {}
38 
39 StringRef Binary::getData() const { return Data.getBuffer(); }
40 
41 StringRef Binary::getFileName() const { return Data.getBufferIdentifier(); }
42 
43 MemoryBufferRef Binary::getMemoryBufferRef() const { return Data; }
44 
45 Expected<std::unique_ptr<Binary>> object::createBinary(MemoryBufferRef Buffer,
46                                                       LLVMContext *Context) {
47   file_magic Type = identify_magic(Buffer.getBuffer());
48 
49   switch (Type) {
50   case file_magic::archive:
51     return Archive::create(Buffer);
52   case file_magic::elf:
53   case file_magic::elf_relocatable:
54   case file_magic::elf_executable:
55   case file_magic::elf_shared_object:
56   case file_magic::elf_core:
57   case file_magic::macho_object:
58   case file_magic::macho_executable:
59   case file_magic::macho_fixed_virtual_memory_shared_lib:
60   case file_magic::macho_core:
61   case file_magic::macho_preload_executable:
62   case file_magic::macho_dynamically_linked_shared_lib:
63   case file_magic::macho_dynamic_linker:
64   case file_magic::macho_bundle:
65   case file_magic::macho_dynamically_linked_shared_lib_stub:
66   case file_magic::macho_dsym_companion:
67   case file_magic::macho_kext_bundle:
68   case file_magic::coff_object:
69   case file_magic::coff_import_library:
70   case file_magic::pecoff_executable:
71   case file_magic::bitcode:
72   case file_magic::xcoff_object_32:
73   case file_magic::wasm_object:
74     return ObjectFile::createSymbolicFile(Buffer, Type, Context);
75   case file_magic::macho_universal_binary:
76     return MachOUniversalBinary::create(Buffer);
77   case file_magic::windows_resource:
78     return WindowsResource::createWindowsResource(Buffer);
79   case file_magic::pdb:
80     // PDB does not support the Binary interface.
81     return errorCodeToError(object_error::invalid_file_type);
82   case file_magic::unknown:
83   case file_magic::coff_cl_gl_object:
84     // Unrecognized object file format.
85     return errorCodeToError(object_error::invalid_file_type);
86   case file_magic::minidump:
87     return MinidumpFile::create(Buffer);
88   }
89   llvm_unreachable("Unexpected Binary File Type");
90 }
91 
92 Expected<OwningBinary<Binary>> object::createBinary(StringRef Path) {
93   ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
94       MemoryBuffer::getFileOrSTDIN(Path, /*FileSize=*/-1,
95                                    /*RequiresNullTerminator=*/false);
96   if (std::error_code EC = FileOrErr.getError())
97     return errorCodeToError(EC);
98   std::unique_ptr<MemoryBuffer> &Buffer = FileOrErr.get();
99 
100   Expected<std::unique_ptr<Binary>> BinOrErr =
101       createBinary(Buffer->getMemBufferRef());
102   if (!BinOrErr)
103     return BinOrErr.takeError();
104   std::unique_ptr<Binary> &Bin = BinOrErr.get();
105 
106   return OwningBinary<Binary>(std::move(Bin), std::move(Buffer));
107 }
108