llvm-project/llvm/tools/yaml2obj/yaml2obj.cpp

100 lines
2.8 KiB
C++

//===- 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/ObjectYAML/ObjectYAML.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("-"));
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"));
static int convertYAML(yaml::Input &YIn, raw_ostream &Out) {
unsigned CurDocNum = 0;
do {
if (++CurDocNum == DocNum) {
yaml::YamlObjectFile Doc;
YIn >> Doc;
if (YIn.error()) {
errs() << "yaml2obj: Failed to parse YAML file!\n";
return 1;
}
if (Doc.Elf)
return yaml2elf(*Doc.Elf, Out);
if (Doc.Coff)
return yaml2coff(*Doc.Coff, Out);
if (Doc.MachO || Doc.FatMachO)
return yaml2macho(Doc, Out);
errs() << "yaml2obj: Unknown document type!\n";
return 1;
}
} 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(argv[0]);
PrettyStackTraceProgram X(argc, argv);
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
if (OutputFilename.empty())
OutputFilename = "-";
std::error_code EC;
std::unique_ptr<tool_output_file> Out(
new tool_output_file(OutputFilename, EC, sys::fs::F_None));
if (EC) {
errs() << EC.message() << '\n';
return 1;
}
ErrorOr<std::unique_ptr<MemoryBuffer>> Buf =
MemoryBuffer::getFileOrSTDIN(Input);
if (!Buf)
return 1;
yaml::Input YIn(Buf.get()->getBuffer());
int Res = convertYAML(YIn, Out->os());
if (Res == 0)
Out->keep();
return Res;
}