//===- yaml2obj - Convert YAML to a binary object file --------------------===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This program takes a YAML description of an object file and outputs the // binary equivalent. // // This is used for writing tests that require binary files. // //===----------------------------------------------------------------------===// #include "yaml2obj.h" #include "llvm/ADT/StringExtras.h" #include "llvm/Support/CommandLine.h" #include "llvm/Support/FileSystem.h" #include "llvm/Support/ManagedStatic.h" #include "llvm/Support/MemoryBuffer.h" #include "llvm/Support/PrettyStackTrace.h" #include "llvm/Support/Signals.h" #include "llvm/Support/ToolOutputFile.h" #include "llvm/Support/YAMLTraits.h" #include "llvm/Support/raw_ostream.h" #include <system_error> using namespace llvm; static cl::opt<std::string> Input(cl::Positional, cl::desc("<input>"), cl::init("-")); // TODO: The "right" way to tell what kind of object file a given YAML file // corresponds to is to look at YAML "tags" (e.g. `!Foo`). Then, different // tags (`!ELF`, `!COFF`, etc.) would be used to discriminate between them. // Interpreting the tags is needed eventually for when writing test cases, // so that we can e.g. have `!Archive` contain a sequence of `!ELF`, and // just Do The Right Thing. However, interpreting these tags and acting on // them appropriately requires some work in the YAML parser and the YAMLIO // library. enum YAMLObjectFormat { YOF_COFF, YOF_ELF }; cl::opt<YAMLObjectFormat> Format( "format", cl::desc("Interpret input as this type of object file"), cl::values( clEnumValN(YOF_COFF, "coff", "COFF object file format"), clEnumValN(YOF_ELF, "elf", "ELF object file format"), clEnumValEnd)); cl::opt<unsigned> DocNum("docnum", cl::init(1), cl::desc("Read specified document from input (default = 1)")); static cl::opt<std::string> OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename")); typedef int (*ConvertFuncPtr)(yaml::Input & YIn, raw_ostream &Out); int convertYAML(yaml::Input & YIn, raw_ostream &Out, ConvertFuncPtr Convert) { unsigned CurDocNum = 0; do { if (++CurDocNum == DocNum) return Convert(YIn, Out); } while (YIn.nextDocument()); errs() << "yaml2obj: Cannot find the " << DocNum << llvm::getOrdinalSuffix(DocNum) << " document\n"; return 1; } int main(int argc, char **argv) { cl::ParseCommandLineOptions(argc, argv); sys::PrintStackTraceOnErrorSignal(); PrettyStackTraceProgram X(argc, argv); llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. if (OutputFilename.empty()) OutputFilename = "-"; std::string ErrorInfo; std::unique_ptr<tool_output_file> Out( new tool_output_file(OutputFilename.c_str(), ErrorInfo, sys::fs::F_None)); if (!ErrorInfo.empty()) { errs() << ErrorInfo << '\n'; return 1; } ErrorOr<std::unique_ptr<MemoryBuffer>> Buf = MemoryBuffer::getFileOrSTDIN(Input); if (!Buf) return 1; ConvertFuncPtr Convert = nullptr; if (Format == YOF_COFF) Convert = yaml2coff; else if (Format == YOF_ELF) Convert = yaml2elf; else { errs() << "Not yet implemented\n"; return 1; } yaml::Input YIn(Buf.get()->getBuffer()); int Res = convertYAML(YIn, Out->os(), Convert); if (Res == 0) Out->keep(); return Res; }