tools/obj2yaml/obj2yaml.cpp

   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 }