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Diffstat (limited to 'contrib/llvm/tools/llvm-mc/llvm-mc.cpp')
| -rw-r--r-- | contrib/llvm/tools/llvm-mc/llvm-mc.cpp | 392 |
1 files changed, 392 insertions, 0 deletions
diff --git a/contrib/llvm/tools/llvm-mc/llvm-mc.cpp b/contrib/llvm/tools/llvm-mc/llvm-mc.cpp new file mode 100644 index 0000000..a114ab0 --- /dev/null +++ b/contrib/llvm/tools/llvm-mc/llvm-mc.cpp @@ -0,0 +1,392 @@ +//===-- llvm-mc.cpp - Machine Code Hacking Driver -------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This utility is a simple driver that allows command line hacking on machine +// code. +// +//===----------------------------------------------------------------------===// + +#include "llvm/MC/MCParser/MCAsmLexer.h" +#include "llvm/MC/MCContext.h" +#include "llvm/MC/MCCodeEmitter.h" +#include "llvm/MC/MCInstPrinter.h" +#include "llvm/MC/MCSectionMachO.h" +#include "llvm/MC/MCStreamer.h" +#include "llvm/MC/MCParser/AsmParser.h" +#include "llvm/Target/TargetAsmBackend.h" +#include "llvm/Target/TargetAsmParser.h" +#include "llvm/Target/TargetData.h" +#include "llvm/Target/TargetRegistry.h" +#include "llvm/Target/TargetMachine.h" // FIXME. +#include "llvm/Target/TargetSelect.h" +#include "llvm/ADT/OwningPtr.h" +#include "llvm/Support/CommandLine.h" +#include "llvm/Support/FormattedStream.h" +#include "llvm/Support/ManagedStatic.h" +#include "llvm/Support/MemoryBuffer.h" +#include "llvm/Support/PrettyStackTrace.h" +#include "llvm/Support/SourceMgr.h" +#include "llvm/Support/raw_ostream.h" +#include "llvm/System/Host.h" +#include "llvm/System/Signals.h" +#include "Disassembler.h" +using namespace llvm; + +static cl::opt<std::string> +InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-")); + +static cl::opt<std::string> +OutputFilename("o", cl::desc("Output filename"), + cl::value_desc("filename")); + +static cl::opt<bool> +ShowEncoding("show-encoding", cl::desc("Show instruction encodings")); + +static cl::opt<bool> +ShowInst("show-inst", cl::desc("Show internal instruction representation")); + +static cl::opt<unsigned> +OutputAsmVariant("output-asm-variant", + cl::desc("Syntax variant to use for output printing")); + +static cl::opt<bool> +RelaxAll("mc-relax-all", cl::desc("Relax all fixups")); + +static cl::opt<bool> +EnableLogging("enable-api-logging", cl::desc("Enable MC API logging")); + +enum OutputFileType { + OFT_Null, + OFT_AssemblyFile, + OFT_ObjectFile +}; +static cl::opt<OutputFileType> +FileType("filetype", cl::init(OFT_AssemblyFile), + cl::desc("Choose an output file type:"), + cl::values( + clEnumValN(OFT_AssemblyFile, "asm", + "Emit an assembly ('.s') file"), + clEnumValN(OFT_Null, "null", + "Don't emit anything (for timing purposes)"), + clEnumValN(OFT_ObjectFile, "obj", + "Emit a native object ('.o') file"), + clEnumValEnd)); + +static cl::list<std::string> +IncludeDirs("I", cl::desc("Directory of include files"), + cl::value_desc("directory"), cl::Prefix); + +static cl::opt<std::string> +ArchName("arch", cl::desc("Target arch to assemble for, " + "see -version for available targets")); + +static cl::opt<std::string> +TripleName("triple", cl::desc("Target triple to assemble for, " + "see -version for available targets")); + +static cl::opt<bool> +NoInitialTextSection("n", cl::desc( + "Don't assume assembly file starts in the text section")); + +enum ActionType { + AC_AsLex, + AC_Assemble, + AC_Disassemble, + AC_EDisassemble +}; + +static cl::opt<ActionType> +Action(cl::desc("Action to perform:"), + cl::init(AC_Assemble), + cl::values(clEnumValN(AC_AsLex, "as-lex", + "Lex tokens from a .s file"), + clEnumValN(AC_Assemble, "assemble", + "Assemble a .s file (default)"), + clEnumValN(AC_Disassemble, "disassemble", + "Disassemble strings of hex bytes"), + clEnumValN(AC_EDisassemble, "edis", + "Enhanced disassembly of strings of hex bytes"), + clEnumValEnd)); + +static const Target *GetTarget(const char *ProgName) { + // Figure out the target triple. + if (TripleName.empty()) + TripleName = sys::getHostTriple(); + if (!ArchName.empty()) { + llvm::Triple TT(TripleName); + TT.setArchName(ArchName); + TripleName = TT.str(); + } + + // Get the target specific parser. + std::string Error; + const Target *TheTarget = TargetRegistry::lookupTarget(TripleName, Error); + if (TheTarget) + return TheTarget; + + errs() << ProgName << ": error: unable to get target for '" << TripleName + << "', see --version and --triple.\n"; + return 0; +} + +static int AsLexInput(const char *ProgName) { + std::string ErrorMessage; + MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(InputFilename, + &ErrorMessage); + if (Buffer == 0) { + errs() << ProgName << ": "; + if (ErrorMessage.size()) + errs() << ErrorMessage << "\n"; + else + errs() << "input file didn't read correctly.\n"; + return 1; + } + + SourceMgr SrcMgr; + + // Tell SrcMgr about this buffer, which is what TGParser will pick up. + SrcMgr.AddNewSourceBuffer(Buffer, SMLoc()); + + // Record the location of the include directories so that the lexer can find + // it later. + SrcMgr.setIncludeDirs(IncludeDirs); + + const Target *TheTarget = GetTarget(ProgName); + if (!TheTarget) + return 1; + + llvm::OwningPtr<MCAsmInfo> MAI(TheTarget->createAsmInfo(TripleName)); + assert(MAI && "Unable to create target asm info!"); + + AsmLexer Lexer(*MAI); + + bool Error = false; + + while (Lexer.Lex().isNot(AsmToken::Eof)) { + switch (Lexer.getKind()) { + default: + SrcMgr.PrintMessage(Lexer.getLoc(), "unknown token", "warning"); + Error = true; + break; + case AsmToken::Error: + Error = true; // error already printed. + break; + case AsmToken::Identifier: + outs() << "identifier: " << Lexer.getTok().getString() << '\n'; + break; + case AsmToken::String: + outs() << "string: " << Lexer.getTok().getString() << '\n'; + break; + case AsmToken::Integer: + outs() << "int: " << Lexer.getTok().getString() << '\n'; + break; + + case AsmToken::Amp: outs() << "Amp\n"; break; + case AsmToken::AmpAmp: outs() << "AmpAmp\n"; break; + case AsmToken::Caret: outs() << "Caret\n"; break; + case AsmToken::Colon: outs() << "Colon\n"; break; + case AsmToken::Comma: outs() << "Comma\n"; break; + case AsmToken::Dollar: outs() << "Dollar\n"; break; + case AsmToken::EndOfStatement: outs() << "EndOfStatement\n"; break; + case AsmToken::Eof: outs() << "Eof\n"; break; + case AsmToken::Equal: outs() << "Equal\n"; break; + case AsmToken::EqualEqual: outs() << "EqualEqual\n"; break; + case AsmToken::Exclaim: outs() << "Exclaim\n"; break; + case AsmToken::ExclaimEqual: outs() << "ExclaimEqual\n"; break; + case AsmToken::Greater: outs() << "Greater\n"; break; + case AsmToken::GreaterEqual: outs() << "GreaterEqual\n"; break; + case AsmToken::GreaterGreater: outs() << "GreaterGreater\n"; break; + case AsmToken::LParen: outs() << "LParen\n"; break; + case AsmToken::Less: outs() << "Less\n"; break; + case AsmToken::LessEqual: outs() << "LessEqual\n"; break; + case AsmToken::LessGreater: outs() << "LessGreater\n"; break; + case AsmToken::LessLess: outs() << "LessLess\n"; break; + case AsmToken::Minus: outs() << "Minus\n"; break; + case AsmToken::Percent: outs() << "Percent\n"; break; + case AsmToken::Pipe: outs() << "Pipe\n"; break; + case AsmToken::PipePipe: outs() << "PipePipe\n"; break; + case AsmToken::Plus: outs() << "Plus\n"; break; + case AsmToken::RParen: outs() << "RParen\n"; break; + case AsmToken::Slash: outs() << "Slash\n"; break; + case AsmToken::Star: outs() << "Star\n"; break; + case AsmToken::Tilde: outs() << "Tilde\n"; break; + } + } + + return Error; +} + +static formatted_raw_ostream *GetOutputStream() { + if (OutputFilename == "") + OutputFilename = "-"; + + // Make sure that the Out file gets unlinked from the disk if we get a + // SIGINT. + if (OutputFilename != "-") + sys::RemoveFileOnSignal(sys::Path(OutputFilename)); + + std::string Err; + raw_fd_ostream *Out = new raw_fd_ostream(OutputFilename.c_str(), Err, + raw_fd_ostream::F_Binary); + if (!Err.empty()) { + errs() << Err << '\n'; + delete Out; + return 0; + } + + return new formatted_raw_ostream(*Out, formatted_raw_ostream::DELETE_STREAM); +} + +static int AssembleInput(const char *ProgName) { + const Target *TheTarget = GetTarget(ProgName); + if (!TheTarget) + return 1; + + std::string Error; + MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(InputFilename, &Error); + if (Buffer == 0) { + errs() << ProgName << ": "; + if (Error.size()) + errs() << Error << "\n"; + else + errs() << "input file didn't read correctly.\n"; + return 1; + } + + SourceMgr SrcMgr; + + // Tell SrcMgr about this buffer, which is what the parser will pick up. + SrcMgr.AddNewSourceBuffer(Buffer, SMLoc()); + + // Record the location of the include directories so that the lexer can find + // it later. + SrcMgr.setIncludeDirs(IncludeDirs); + + + llvm::OwningPtr<MCAsmInfo> MAI(TheTarget->createAsmInfo(TripleName)); + assert(MAI && "Unable to create target asm info!"); + + MCContext Ctx(*MAI); + formatted_raw_ostream *Out = GetOutputStream(); + if (!Out) + return 1; + + + // FIXME: We shouldn't need to do this (and link in codegen). + OwningPtr<TargetMachine> TM(TheTarget->createTargetMachine(TripleName, "")); + + if (!TM) { + errs() << ProgName << ": error: could not create target for triple '" + << TripleName << "'.\n"; + return 1; + } + + OwningPtr<MCCodeEmitter> CE; + OwningPtr<MCStreamer> Str; + OwningPtr<TargetAsmBackend> TAB; + + if (FileType == OFT_AssemblyFile) { + MCInstPrinter *IP = + TheTarget->createMCInstPrinter(OutputAsmVariant, *MAI); + if (ShowEncoding) + CE.reset(TheTarget->createCodeEmitter(*TM, Ctx)); + Str.reset(createAsmStreamer(Ctx, *Out,TM->getTargetData()->isLittleEndian(), + /*asmverbose*/true, IP, CE.get(), ShowInst)); + } else if (FileType == OFT_Null) { + Str.reset(createNullStreamer(Ctx)); + } else { + assert(FileType == OFT_ObjectFile && "Invalid file type!"); + CE.reset(TheTarget->createCodeEmitter(*TM, Ctx)); + TAB.reset(TheTarget->createAsmBackend(TripleName)); + Str.reset(TheTarget->createObjectStreamer(TripleName, Ctx, *TAB, + *Out, CE.get(), RelaxAll)); + } + + if (EnableLogging) { + Str.reset(createLoggingStreamer(Str.take(), errs())); + } + + AsmParser Parser(SrcMgr, Ctx, *Str.get(), *MAI); + OwningPtr<TargetAsmParser> TAP(TheTarget->createAsmParser(Parser)); + if (!TAP) { + errs() << ProgName + << ": error: this target does not support assembly parsing.\n"; + return 1; + } + + Parser.setTargetParser(*TAP.get()); + + int Res = Parser.Run(NoInitialTextSection); + if (Out != &fouts()) + delete Out; + + // Delete output on errors. + if (Res && OutputFilename != "-") + sys::Path(OutputFilename).eraseFromDisk(); + + return Res; +} + +static int DisassembleInput(const char *ProgName, bool Enhanced) { + const Target *TheTarget = GetTarget(ProgName); + if (!TheTarget) + return 0; + + std::string ErrorMessage; + + MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(InputFilename, + &ErrorMessage); + + if (Buffer == 0) { + errs() << ProgName << ": "; + if (ErrorMessage.size()) + errs() << ErrorMessage << "\n"; + else + errs() << "input file didn't read correctly.\n"; + return 1; + } + + if (Enhanced) + return Disassembler::disassembleEnhanced(TripleName, *Buffer); + else + return Disassembler::disassemble(*TheTarget, TripleName, *Buffer); +} + + +int main(int argc, char **argv) { + // Print a stack trace if we signal out. + sys::PrintStackTraceOnErrorSignal(); + PrettyStackTraceProgram X(argc, argv); + llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. + + // Initialize targets and assembly printers/parsers. + llvm::InitializeAllTargetInfos(); + // FIXME: We shouldn't need to initialize the Target(Machine)s. + llvm::InitializeAllTargets(); + llvm::InitializeAllAsmPrinters(); + llvm::InitializeAllAsmParsers(); + llvm::InitializeAllDisassemblers(); + + cl::ParseCommandLineOptions(argc, argv, "llvm machine code playground\n"); + + switch (Action) { + default: + case AC_AsLex: + return AsLexInput(argv[0]); + case AC_Assemble: + return AssembleInput(argv[0]); + case AC_Disassemble: + return DisassembleInput(argv[0], false); + case AC_EDisassemble: + return DisassembleInput(argv[0], true); + } + + return 0; +} + |
