X-Git-Url: http://git.osdn.net/view?a=blobdiff_plain;f=tools%2Fllvm-mc%2Fllvm-mc.cpp;h=ec189c2978600fd505174f65f315f9fb11e9d310;hb=19f0f50d66e48b3e00ccb7e87700e6eff1b5e56a;hp=6a8b49373df59c2ea4f68391e4bd80d52f4982f9;hpb=c98092e28db7f3def249a1bf37483b264dd46194;p=android-x86%2Fexternal-llvm.git diff --git a/tools/llvm-mc/llvm-mc.cpp b/tools/llvm-mc/llvm-mc.cpp index 6a8b49373df..ec189c29786 100644 --- a/tools/llvm-mc/llvm-mc.cpp +++ b/tools/llvm-mc/llvm-mc.cpp @@ -1,9 +1,8 @@ -//===-- llvm-mc.cpp - Machine Code Hacking Driver -------------------------===// +//===-- llvm-mc.cpp - Machine Code Hacking Driver ---------------*- C++ -*-===// // -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // @@ -15,45 +14,60 @@ #include "Disassembler.h" #include "llvm/MC/MCAsmBackend.h" #include "llvm/MC/MCAsmInfo.h" +#include "llvm/MC/MCCodeEmitter.h" #include "llvm/MC/MCContext.h" #include "llvm/MC/MCInstPrinter.h" #include "llvm/MC/MCInstrInfo.h" #include "llvm/MC/MCObjectFileInfo.h" +#include "llvm/MC/MCObjectWriter.h" #include "llvm/MC/MCParser/AsmLexer.h" +#include "llvm/MC/MCParser/MCTargetAsmParser.h" #include "llvm/MC/MCRegisterInfo.h" -#include "llvm/MC/MCSectionMachO.h" #include "llvm/MC/MCStreamer.h" #include "llvm/MC/MCSubtargetInfo.h" -#include "llvm/MC/MCTargetAsmParser.h" -#include "llvm/MC/MCTargetOptionsCommandFlags.h" +#include "llvm/MC/MCTargetOptionsCommandFlags.inc" #include "llvm/Support/CommandLine.h" #include "llvm/Support/Compression.h" #include "llvm/Support/FileUtilities.h" #include "llvm/Support/FormattedStream.h" #include "llvm/Support/Host.h" -#include "llvm/Support/ManagedStatic.h" +#include "llvm/Support/InitLLVM.h" #include "llvm/Support/MemoryBuffer.h" -#include "llvm/Support/PrettyStackTrace.h" -#include "llvm/Support/Signals.h" #include "llvm/Support/SourceMgr.h" #include "llvm/Support/TargetRegistry.h" #include "llvm/Support/TargetSelect.h" #include "llvm/Support/ToolOutputFile.h" +#include "llvm/Support/WithColor.h" + using namespace llvm; static cl::opt InputFilename(cl::Positional, cl::desc(""), cl::init("-")); -static cl::opt -OutputFilename("o", cl::desc("Output filename"), - cl::value_desc("filename")); +static cl::opt OutputFilename("o", cl::desc("Output filename"), + cl::value_desc("filename"), + cl::init("-")); + +static cl::opt SplitDwarfFile("split-dwarf-file", + cl::desc("DWO output filename"), + cl::value_desc("filename")); static cl::opt ShowEncoding("show-encoding", cl::desc("Show instruction encodings")); -static cl::opt -CompressDebugSections("compress-debug-sections", - cl::desc("Compress DWARF debug sections")); +static cl::opt RelaxELFRel( + "relax-relocations", cl::init(true), + cl::desc("Emit R_X86_64_GOTPCRELX instead of R_X86_64_GOTPCREL")); + +static cl::opt CompressDebugSections( + "compress-debug-sections", cl::ValueOptional, + cl::init(DebugCompressionType::None), + cl::desc("Choose DWARF debug sections compression:"), + cl::values(clEnumValN(DebugCompressionType::None, "none", "No compression"), + clEnumValN(DebugCompressionType::Z, "zlib", + "Use zlib compression"), + clEnumValN(DebugCompressionType::GNU, "zlib-gnu", + "Use zlib-gnu compression (deprecated)"))); static cl::opt ShowInst("show-inst", cl::desc("Show internal instruction representation")); @@ -70,6 +84,13 @@ static cl::opt PrintImmHex("print-imm-hex", cl::init(false), cl::desc("Prefer hex format for immediate values")); +static cl::list +DefineSymbol("defsym", cl::desc("Defines a symbol to be an integer constant")); + +static cl::opt + PreserveComments("preserve-comments", + cl::desc("Preserve Comments in outputted assembly")); + enum OutputFileType { OFT_Null, OFT_AssemblyFile, @@ -84,8 +105,7 @@ FileType("filetype", cl::init(OFT_AssemblyFile), clEnumValN(OFT_Null, "null", "Don't emit anything (for timing purposes)"), clEnumValN(OFT_ObjectFile, "obj", - "Emit a native object ('.o') file"), - clEnumValEnd)); + "Emit a native object ('.o') file"))); static cl::list IncludeDirs("I", cl::desc("Directory of include files"), @@ -111,36 +131,13 @@ MAttrs("mattr", cl::desc("Target specific attributes (-mattr=help for details)"), cl::value_desc("a1,+a2,-a3,...")); -static cl::opt -RelocModel("relocation-model", - cl::desc("Choose relocation model"), - cl::init(Reloc::Default), - cl::values( - clEnumValN(Reloc::Default, "default", - "Target default relocation model"), - clEnumValN(Reloc::Static, "static", - "Non-relocatable code"), - clEnumValN(Reloc::PIC_, "pic", - "Fully relocatable, position independent code"), - clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic", - "Relocatable external references, non-relocatable code"), - clEnumValEnd)); - -static cl::opt -CMModel("code-model", - cl::desc("Choose code model"), - cl::init(CodeModel::Default), - cl::values(clEnumValN(CodeModel::Default, "default", - "Target default code model"), - clEnumValN(CodeModel::Small, "small", - "Small code model"), - clEnumValN(CodeModel::Kernel, "kernel", - "Kernel code model"), - clEnumValN(CodeModel::Medium, "medium", - "Medium code model"), - clEnumValN(CodeModel::Large, "large", - "Large code model"), - clEnumValEnd)); +static cl::opt PIC("position-independent", + cl::desc("Position independent"), cl::init(false)); + +static cl::opt + LargeCodeModel("large-code-model", + cl::desc("Create cfi directives that assume the code might " + "be more than 2gb away")); static cl::opt NoInitialTextSection("n", cl::desc("Don't assume assembly file starts " @@ -154,6 +151,11 @@ static cl::opt DebugCompilationDir("fdebug-compilation-dir", cl::desc("Specifies the debug info's compilation dir")); +static cl::list +DebugPrefixMap("fdebug-prefix-map", + cl::desc("Map file source paths in debug info"), + cl::value_desc("= separated key-value pairs")); + static cl::opt MainFileName("main-file-name", cl::desc("Specifies the name we should consider the input file")); @@ -161,6 +163,10 @@ MainFileName("main-file-name", static cl::opt SaveTempLabels("save-temp-labels", cl::desc("Don't discard temporary labels")); +static cl::opt LexMasmIntegers( + "masm-integers", + cl::desc("Enable binary and hex masm integers (0b110 and 0ABCh)")); + static cl::opt NoExecStack("no-exec-stack", cl::desc("File doesn't need an exec stack")); @@ -181,8 +187,7 @@ Action(cl::desc("Action to perform:"), clEnumValN(AC_Disassemble, "disassemble", "Disassemble strings of hex bytes"), clEnumValN(AC_MDisassemble, "mdis", - "Marked up disassembly of strings of hex bytes"), - clEnumValEnd)); + "Marked up disassembly of strings of hex bytes"))); static const Target *GetTarget(const char *ProgName) { // Figure out the target triple. @@ -195,7 +200,7 @@ static const Target *GetTarget(const char *ProgName) { const Target *TheTarget = TargetRegistry::lookupTarget(ArchName, TheTriple, Error); if (!TheTarget) { - errs() << ProgName << ": " << Error; + WithColor::error(errs(), ProgName) << Error; return nullptr; } @@ -204,15 +209,11 @@ static const Target *GetTarget(const char *ProgName) { return TheTarget; } -static std::unique_ptr GetOutputStream() { - if (OutputFilename == "") - OutputFilename = "-"; - +static std::unique_ptr GetOutputStream(StringRef Path) { std::error_code EC; - auto Out = llvm::make_unique(OutputFilename, EC, - sys::fs::F_None); + auto Out = llvm::make_unique(Path, EC, sys::fs::F_None); if (EC) { - errs() << EC.message() << '\n'; + WithColor::error() << EC.message() << '\n'; return nullptr; } @@ -231,7 +232,7 @@ static void setDwarfDebugFlags(int argc, char **argv) { } static std::string DwarfDebugProducer; -static void setDwarfDebugProducer(void) { +static void setDwarfDebugProducer() { if(!getenv("DEBUG_PRODUCER")) return; DwarfDebugProducer += getenv("DEBUG_PRODUCER"); @@ -245,77 +246,36 @@ static int AsLexInput(SourceMgr &SrcMgr, MCAsmInfo &MAI, bool Error = false; while (Lexer.Lex().isNot(AsmToken::Eof)) { - AsmToken Tok = Lexer.getTok(); - - switch (Tok.getKind()) { - default: - SrcMgr.PrintMessage(Lexer.getLoc(), SourceMgr::DK_Warning, - "unknown token"); + Lexer.getTok().dump(OS); + OS << "\n"; + if (Lexer.getTok().getKind() == AsmToken::Error) Error = true; - break; - case AsmToken::Error: - Error = true; // error already printed. - break; - case AsmToken::Identifier: - OS << "identifier: " << Lexer.getTok().getString(); - break; - case AsmToken::Integer: - OS << "int: " << Lexer.getTok().getString(); - break; - case AsmToken::Real: - OS << "real: " << Lexer.getTok().getString(); - break; - case AsmToken::String: - OS << "string: " << Lexer.getTok().getString(); - break; - - case AsmToken::Amp: OS << "Amp"; break; - case AsmToken::AmpAmp: OS << "AmpAmp"; break; - case AsmToken::At: OS << "At"; break; - case AsmToken::Caret: OS << "Caret"; break; - case AsmToken::Colon: OS << "Colon"; break; - case AsmToken::Comma: OS << "Comma"; break; - case AsmToken::Dollar: OS << "Dollar"; break; - case AsmToken::Dot: OS << "Dot"; break; - case AsmToken::EndOfStatement: OS << "EndOfStatement"; break; - case AsmToken::Eof: OS << "Eof"; break; - case AsmToken::Equal: OS << "Equal"; break; - case AsmToken::EqualEqual: OS << "EqualEqual"; break; - case AsmToken::Exclaim: OS << "Exclaim"; break; - case AsmToken::ExclaimEqual: OS << "ExclaimEqual"; break; - case AsmToken::Greater: OS << "Greater"; break; - case AsmToken::GreaterEqual: OS << "GreaterEqual"; break; - case AsmToken::GreaterGreater: OS << "GreaterGreater"; break; - case AsmToken::Hash: OS << "Hash"; break; - case AsmToken::LBrac: OS << "LBrac"; break; - case AsmToken::LCurly: OS << "LCurly"; break; - case AsmToken::LParen: OS << "LParen"; break; - case AsmToken::Less: OS << "Less"; break; - case AsmToken::LessEqual: OS << "LessEqual"; break; - case AsmToken::LessGreater: OS << "LessGreater"; break; - case AsmToken::LessLess: OS << "LessLess"; break; - case AsmToken::Minus: OS << "Minus"; break; - case AsmToken::Percent: OS << "Percent"; break; - case AsmToken::Pipe: OS << "Pipe"; break; - case AsmToken::PipePipe: OS << "PipePipe"; break; - case AsmToken::Plus: OS << "Plus"; break; - case AsmToken::RBrac: OS << "RBrac"; break; - case AsmToken::RCurly: OS << "RCurly"; break; - case AsmToken::RParen: OS << "RParen"; break; - case AsmToken::Slash: OS << "Slash"; break; - case AsmToken::Star: OS << "Star"; break; - case AsmToken::Tilde: OS << "Tilde"; break; - } - - // Print the token string. - OS << " (\""; - OS.write_escaped(Tok.getString()); - OS << "\")\n"; } return Error; } +static int fillCommandLineSymbols(MCAsmParser &Parser) { + for (auto &I: DefineSymbol) { + auto Pair = StringRef(I).split('='); + auto Sym = Pair.first; + auto Val = Pair.second; + + if (Sym.empty() || Val.empty()) { + WithColor::error() << "defsym must be of the form: sym=value: " << I + << "\n"; + return 1; + } + int64_t Value; + if (Val.getAsInteger(0, Value)) { + WithColor::error() << "value is not an integer: " << Val << "\n"; + return 1; + } + Parser.getContext().setSymbolValue(Parser.getStreamer(), Sym, Value); + } + return 0; +} + static int AssembleInput(const char *ProgName, const Target *TheTarget, SourceMgr &SrcMgr, MCContext &Ctx, MCStreamer &Str, MCAsmInfo &MAI, MCSubtargetInfo &STI, @@ -326,13 +286,17 @@ static int AssembleInput(const char *ProgName, const Target *TheTarget, TheTarget->createMCAsmParser(STI, *Parser, MCII, MCOptions)); if (!TAP) { - errs() << ProgName - << ": error: this target does not support assembly parsing.\n"; + WithColor::error(errs(), ProgName) + << "this target does not support assembly parsing.\n"; return 1; } + int SymbolResult = fillCommandLineSymbols(*Parser); + if(SymbolResult) + return SymbolResult; Parser->setShowParsedOperands(ShowInstOperands); Parser->setTargetParser(*TAP); + Parser->getLexer().setLexMasmIntegers(LexMasmIntegers); int Res = Parser->Run(NoInitialTextSection); @@ -340,10 +304,7 @@ static int AssembleInput(const char *ProgName, const Target *TheTarget, } 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. + InitLLVM X(argc, argv); // Initialize targets and assembly printers/parsers. llvm::InitializeAllTargetInfos(); @@ -356,8 +317,6 @@ int main(int argc, char **argv) { cl::ParseCommandLineOptions(argc, argv, "llvm machine code playground\n"); MCTargetOptions MCOptions = InitMCTargetOptionsFromFlags(); - TripleName = Triple::normalize(TripleName); - Triple TheTriple(TripleName); setDwarfDebugFlags(argc, argv); setDwarfDebugProducer(); @@ -366,11 +325,15 @@ int main(int argc, char **argv) { const Target *TheTarget = GetTarget(ProgName); if (!TheTarget) return 1; + // Now that GetTarget() has (potentially) replaced TripleName, it's safe to + // construct the Triple object. + Triple TheTriple(TripleName); ErrorOr> BufferPtr = MemoryBuffer::getFileOrSTDIN(InputFilename); if (std::error_code EC = BufferPtr.getError()) { - errs() << ProgName << ": " << EC.message() << '\n'; + WithColor::error(errs(), ProgName) + << InputFilename << ": " << EC.message() << '\n'; return 1; } MemoryBuffer *Buffer = BufferPtr->get(); @@ -390,20 +353,23 @@ int main(int argc, char **argv) { std::unique_ptr MAI(TheTarget->createMCAsmInfo(*MRI, TripleName)); assert(MAI && "Unable to create target asm info!"); - if (CompressDebugSections) { + MAI->setRelaxELFRelocations(RelaxELFRel); + + if (CompressDebugSections != DebugCompressionType::None) { if (!zlib::isAvailable()) { - errs() << ProgName - << ": build tools with zlib to enable -compress-debug-sections"; + WithColor::error(errs(), ProgName) + << "build tools with zlib to enable -compress-debug-sections"; return 1; } - MAI->setCompressDebugSections(true); + MAI->setCompressDebugSections(CompressDebugSections); } + MAI->setPreserveAsmComments(PreserveComments); // FIXME: This is not pretty. MCContext has a ptr to MCObjectFileInfo and // MCObjectFileInfo needs a MCContext reference in order to initialize itself. MCObjectFileInfo MOFI; MCContext Ctx(MAI.get(), MRI.get(), &MOFI, &SrcMgr); - MOFI.InitMCObjectFileInfo(TripleName, RelocModel, CMModel, Ctx); + MOFI.InitMCObjectFileInfo(TheTriple, PIC, Ctx, LargeCodeModel); if (SaveTempLabels) Ctx.setAllowTemporaryLabels(false); @@ -411,7 +377,7 @@ int main(int argc, char **argv) { Ctx.setGenDwarfForAssembly(GenDwarfForAssembly); // Default to 4 for dwarf version. unsigned DwarfVersion = MCOptions.DwarfVersion ? MCOptions.DwarfVersion : 4; - if (DwarfVersion < 2 || DwarfVersion > 4) { + if (DwarfVersion < 2 || DwarfVersion > 5) { errs() << ProgName << ": Dwarf version " << DwarfVersion << " is not supported." << '\n'; return 1; @@ -423,8 +389,20 @@ int main(int argc, char **argv) { Ctx.setDwarfDebugProducer(StringRef(DwarfDebugProducer)); if (!DebugCompilationDir.empty()) Ctx.setCompilationDir(DebugCompilationDir); + else { + // If no compilation dir is set, try to use the current directory. + SmallString<128> CWD; + if (!sys::fs::current_path(CWD)) + Ctx.setCompilationDir(CWD); + } + for (const auto &Arg : DebugPrefixMap) { + const auto &KV = StringRef(Arg).split('='); + Ctx.addDebugPrefixMapEntry(KV.first, KV.second); + } if (!MainFileName.empty()) Ctx.setMainFileName(MainFileName); + if (GenDwarfForAssembly) + Ctx.setGenDwarfRootFile(InputFilename, Buffer->getBuffer()); // Package up features to be passed to target/subtarget std::string FeaturesStr; @@ -435,10 +413,21 @@ int main(int argc, char **argv) { FeaturesStr = Features.getString(); } - std::unique_ptr Out = GetOutputStream(); + std::unique_ptr Out = GetOutputStream(OutputFilename); if (!Out) return 1; + std::unique_ptr DwoOut; + if (!SplitDwarfFile.empty()) { + if (FileType != OFT_ObjectFile) { + WithColor::error() << "dwo output only supported with object files\n"; + return 1; + } + DwoOut = GetOutputStream(SplitDwarfFile); + if (!DwoOut) + return 1; + } + std::unique_ptr BOS; raw_pwrite_stream *OS = &Out->os(); std::unique_ptr Str; @@ -452,40 +441,59 @@ int main(int argc, char **argv) { IP = TheTarget->createMCInstPrinter(Triple(TripleName), OutputAsmVariant, *MAI, *MCII, *MRI); + if (!IP) { + WithColor::error() + << "unable to create instruction printer for target triple '" + << TheTriple.normalize() << "' with assembly variant " + << OutputAsmVariant << ".\n"; + return 1; + } + // Set the display preference for hex vs. decimal immediates. IP->setPrintImmHex(PrintImmHex); // Set up the AsmStreamer. - MCCodeEmitter *CE = nullptr; - MCAsmBackend *MAB = nullptr; - if (ShowEncoding) { - CE = TheTarget->createMCCodeEmitter(*MCII, *MRI, Ctx); - MAB = TheTarget->createMCAsmBackend(*MRI, TripleName, MCPU); - } + std::unique_ptr CE; + if (ShowEncoding) + CE.reset(TheTarget->createMCCodeEmitter(*MCII, *MRI, Ctx)); + + std::unique_ptr MAB( + TheTarget->createMCAsmBackend(*STI, *MRI, MCOptions)); auto FOut = llvm::make_unique(*OS); - Str.reset(TheTarget->createAsmStreamer( - Ctx, std::move(FOut), /*asmverbose*/ true, - /*useDwarfDirectory*/ true, IP, CE, MAB, ShowInst)); + Str.reset( + TheTarget->createAsmStreamer(Ctx, std::move(FOut), /*asmverbose*/ true, + /*useDwarfDirectory*/ true, IP, + std::move(CE), std::move(MAB), ShowInst)); } else if (FileType == OFT_Null) { Str.reset(TheTarget->createNullStreamer(Ctx)); } else { assert(FileType == OFT_ObjectFile && "Invalid file type!"); + // Don't waste memory on names of temp labels. + Ctx.setUseNamesOnTempLabels(false); + if (!Out->os().supportsSeeking()) { BOS = make_unique(Out->os()); OS = BOS.get(); } MCCodeEmitter *CE = TheTarget->createMCCodeEmitter(*MCII, *MRI, Ctx); - MCAsmBackend *MAB = TheTarget->createMCAsmBackend(*MRI, TripleName, MCPU); - Str.reset(TheTarget->createMCObjectStreamer(TheTriple, Ctx, *MAB, *OS, CE, - *STI, RelaxAll, - /*DWARFMustBeAtTheEnd*/ false)); + MCAsmBackend *MAB = TheTarget->createMCAsmBackend(*STI, *MRI, MCOptions); + Str.reset(TheTarget->createMCObjectStreamer( + TheTriple, Ctx, std::unique_ptr(MAB), + DwoOut ? MAB->createDwoObjectWriter(*OS, DwoOut->os()) + : MAB->createObjectWriter(*OS), + std::unique_ptr(CE), *STI, MCOptions.MCRelaxAll, + MCOptions.MCIncrementalLinkerCompatible, + /*DWARFMustBeAtTheEnd*/ false)); if (NoExecStack) Str->InitSections(true); } + // Use Assembler information for parsing. + Str->setUseAssemblerInfoForParsing(true); + int Res = 1; bool disassemble = false; switch (Action) { @@ -510,6 +518,10 @@ int main(int argc, char **argv) { *Buffer, SrcMgr, Out->os()); // Keep output if no errors. - if (Res == 0) Out->keep(); + if (Res == 0) { + Out->keep(); + if (DwoOut) + DwoOut->keep(); + } return Res; }