1 //===-- yaml2obj.cpp ------------------------------------------------------===//
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 #include "llvm/ObjectYAML/yaml2obj.h"
10 #include "llvm/ADT/StringExtras.h"
11 #include "llvm/ADT/Twine.h"
12 #include "llvm/Object/ObjectFile.h"
13 #include "llvm/ObjectYAML/ObjectYAML.h"
14 #include "llvm/Support/Errc.h"
15 #include "llvm/Support/WithColor.h"
16 #include "llvm/Support/YAMLTraits.h"
17 
18 namespace llvm {
19 namespace yaml {
20 
21 bool convertYAML(yaml::Input &YIn, raw_ostream &Out, ErrorHandler ErrHandler,
22                  unsigned DocNum, uint64_t MaxSize) {
23   unsigned CurDocNum = 0;
24   do {
25     if (++CurDocNum != DocNum)
26       continue;
27 
28     yaml::YamlObjectFile Doc;
29     YIn >> Doc;
30     if (std::error_code EC = YIn.error()) {
31       ErrHandler("failed to parse YAML input: " + EC.message());
32       return false;
33     }
34 
35     if (Doc.Arch)
36       return yaml2archive(*Doc.Arch, Out, ErrHandler);
37     if (Doc.Elf)
38       return yaml2elf(*Doc.Elf, Out, ErrHandler, MaxSize);
39     if (Doc.Coff)
40       return yaml2coff(*Doc.Coff, Out, ErrHandler);
41     if (Doc.MachO || Doc.FatMachO)
42       return yaml2macho(Doc, Out, ErrHandler);
43     if (Doc.Minidump)
44       return yaml2minidump(*Doc.Minidump, Out, ErrHandler);
45     if (Doc.Wasm)
46       return yaml2wasm(*Doc.Wasm, Out, ErrHandler);
47     if (Doc.Xcoff)
48       return yaml2xcoff(*Doc.Xcoff, Out, ErrHandler);
49     if (Doc.DXContainer)
50       return yaml2dxcontainer(*Doc.DXContainer, Out, ErrHandler);
51 
52     ErrHandler("unknown document type");
53     return false;
54 
55   } while (YIn.nextDocument());
56 
57   ErrHandler("cannot find the " + Twine(DocNum) +
58              getOrdinalSuffix(DocNum).data() + " document");
59   return false;
60 }
61 
62 std::unique_ptr<object::ObjectFile>
63 yaml2ObjectFile(SmallVectorImpl<char> &Storage, StringRef Yaml,
64                 ErrorHandler ErrHandler) {
65   Storage.clear();
66   raw_svector_ostream OS(Storage);
67 
68   yaml::Input YIn(Yaml);
69   if (!convertYAML(YIn, OS, ErrHandler))
70     return {};
71 
72   Expected<std::unique_ptr<object::ObjectFile>> ObjOrErr =
73       object::ObjectFile::createObjectFile(
74           MemoryBufferRef(OS.str(), "YamlObject"));
75   if (ObjOrErr)
76     return std::move(*ObjOrErr);
77 
78   ErrHandler(toString(ObjOrErr.takeError()));
79   return {};
80 }
81 
82 } // namespace yaml
83 } // namespace llvm
84