1 //===- yaml2obj - Convert YAML to a binary object file --------------------===//
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 program takes a YAML description of an object file and outputs the
11 // binary equivalent.
12 //
13 // This is used for writing tests that require binary files.
14 //
15 //===----------------------------------------------------------------------===//
16
17 #include "yaml2obj.h"
18 #include "llvm/ADT/StringExtras.h"
19 #include "llvm/ObjectYAML/ObjectYAML.h"
20 #include "llvm/Support/CommandLine.h"
21 #include "llvm/Support/FileSystem.h"
22 #include "llvm/Support/InitLLVM.h"
23 #include "llvm/Support/MemoryBuffer.h"
24 #include "llvm/Support/ToolOutputFile.h"
25 #include "llvm/Support/YAMLTraits.h"
26 #include "llvm/Support/raw_ostream.h"
27 #include <system_error>
28
29 using namespace llvm;
30
31 static cl::opt<std::string>
32 Input(cl::Positional, cl::desc("<input>"), cl::init("-"));
33
34 cl::opt<unsigned>
35 DocNum("docnum", cl::init(1),
36 cl::desc("Read specified document from input (default = 1)"));
37
38 static cl::opt<std::string> OutputFilename("o", cl::desc("Output filename"),
39 cl::value_desc("filename"));
40
error(Twine Message)41 LLVM_ATTRIBUTE_NORETURN static void error(Twine Message) {
42 errs() << Message << "\n";
43 exit(1);
44 }
45
convertYAML(yaml::Input & YIn,raw_ostream & Out)46 static int convertYAML(yaml::Input &YIn, raw_ostream &Out) {
47 unsigned CurDocNum = 0;
48 do {
49 if (++CurDocNum == DocNum) {
50 yaml::YamlObjectFile Doc;
51 YIn >> Doc;
52 if (YIn.error())
53 error("yaml2obj: Failed to parse YAML file!");
54 if (Doc.Elf)
55 return yaml2elf(*Doc.Elf, Out);
56 if (Doc.Coff)
57 return yaml2coff(*Doc.Coff, Out);
58 if (Doc.MachO || Doc.FatMachO)
59 return yaml2macho(Doc, Out);
60 if (Doc.Wasm)
61 return yaml2wasm(*Doc.Wasm, Out);
62 error("yaml2obj: Unknown document type!");
63 }
64 } while (YIn.nextDocument());
65
66 error("yaml2obj: Cannot find the " + Twine(DocNum) +
67 llvm::getOrdinalSuffix(DocNum) + " document");
68 }
69
main(int argc,char ** argv)70 int main(int argc, char **argv) {
71 InitLLVM X(argc, argv);
72 cl::ParseCommandLineOptions(argc, argv);
73
74 if (OutputFilename.empty())
75 OutputFilename = "-";
76
77 std::error_code EC;
78 std::unique_ptr<ToolOutputFile> Out(
79 new ToolOutputFile(OutputFilename, EC, sys::fs::F_None));
80 if (EC)
81 error("yaml2obj: Error opening '" + OutputFilename + "': " + EC.message());
82
83 ErrorOr<std::unique_ptr<MemoryBuffer>> Buf =
84 MemoryBuffer::getFileOrSTDIN(Input);
85 if (!Buf)
86 return 1;
87
88 yaml::Input YIn(Buf.get()->getBuffer());
89
90 int Res = convertYAML(YIn, Out->os());
91 if (Res == 0)
92 Out->keep();
93
94 Out->os().flush();
95 return Res;
96 }
97