1 //===------ utils/obj2yaml.cpp - obj2yaml conversion tool -------*- C++ -*-===//
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 "obj2yaml.h"
10 #include "Error.h"
11 #include "llvm/Object/Archive.h"
12 #include "llvm/Object/COFF.h"
13 #include "llvm/Support/CommandLine.h"
14 #include "llvm/Support/InitLLVM.h"
15 
16 using namespace llvm;
17 using namespace llvm::object;
18 
19 static std::error_code dumpObject(const ObjectFile &Obj) {
20   if (Obj.isCOFF())
21     return coff2yaml(outs(), cast<COFFObjectFile>(Obj));
22   if (Obj.isELF())
23     return elf2yaml(outs(), Obj);
24   if (Obj.isWasm())
25     return wasm2yaml(outs(), cast<WasmObjectFile>(Obj));
26 
27   return obj2yaml_error::unsupported_obj_file_format;
28 }
29 
30 static Error dumpInput(StringRef File) {
31   Expected<OwningBinary<Binary>> BinaryOrErr = createBinary(File);
32   if (!BinaryOrErr)
33     return BinaryOrErr.takeError();
34 
35   Binary &Binary = *BinaryOrErr.get().getBinary();
36   // Universal MachO is not a subclass of ObjectFile, so it needs to be handled
37   // here with the other binary types.
38   if (Binary.isMachO() || Binary.isMachOUniversalBinary())
39     return errorCodeToError(macho2yaml(outs(), Binary));
40   // TODO: If this is an archive, then burst it and dump each entry
41   if (ObjectFile *Obj = dyn_cast<ObjectFile>(&Binary))
42     return errorCodeToError(dumpObject(*Obj));
43 
44   return Error::success();
45 }
46 
47 static void reportError(StringRef Input, Error Err) {
48   if (Input == "-")
49     Input = "<stdin>";
50   std::string ErrMsg;
51   raw_string_ostream OS(ErrMsg);
52   logAllUnhandledErrors(std::move(Err), OS);
53   OS.flush();
54   errs() << "Error reading file: " << Input << ": " << ErrMsg;
55   errs().flush();
56 }
57 
58 cl::opt<std::string> InputFilename(cl::Positional, cl::desc("<input file>"),
59                                    cl::init("-"));
60 
61 int main(int argc, char *argv[]) {
62   InitLLVM X(argc, argv);
63   cl::ParseCommandLineOptions(argc, argv);
64 
65   if (Error Err = dumpInput(InputFilename)) {
66     reportError(InputFilename, std::move(Err));
67     return 1;
68   }
69 
70   return 0;
71 }
72