1 //===-- llvm-mc.cpp - Machine Code Hacking Driver ---------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This utility is a simple driver that allows command line hacking on machine 11 // code. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #include "Disassembler.h" 16 #include "llvm/MC/MCAsmBackend.h" 17 #include "llvm/MC/MCAsmInfo.h" 18 #include "llvm/MC/MCContext.h" 19 #include "llvm/MC/MCInstPrinter.h" 20 #include "llvm/MC/MCInstrInfo.h" 21 #include "llvm/MC/MCObjectFileInfo.h" 22 #include "llvm/MC/MCParser/AsmLexer.h" 23 #include "llvm/MC/MCParser/MCTargetAsmParser.h" 24 #include "llvm/MC/MCRegisterInfo.h" 25 #include "llvm/MC/MCSectionMachO.h" 26 #include "llvm/MC/MCStreamer.h" 27 #include "llvm/MC/MCSubtargetInfo.h" 28 #include "llvm/MC/MCTargetOptionsCommandFlags.h" 29 #include "llvm/Support/CommandLine.h" 30 #include "llvm/Support/Compression.h" 31 #include "llvm/Support/FileUtilities.h" 32 #include "llvm/Support/FormattedStream.h" 33 #include "llvm/Support/Host.h" 34 #include "llvm/Support/ManagedStatic.h" 35 #include "llvm/Support/MemoryBuffer.h" 36 #include "llvm/Support/PrettyStackTrace.h" 37 #include "llvm/Support/Signals.h" 38 #include "llvm/Support/SourceMgr.h" 39 #include "llvm/Support/TargetRegistry.h" 40 #include "llvm/Support/TargetSelect.h" 41 #include "llvm/Support/ToolOutputFile.h" 42 43 using namespace llvm; 44 45 static cl::opt<std::string> 46 InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-")); 47 48 static cl::opt<std::string> 49 OutputFilename("o", cl::desc("Output filename"), 50 cl::value_desc("filename")); 51 52 static cl::opt<bool> 53 ShowEncoding("show-encoding", cl::desc("Show instruction encodings")); 54 55 static cl::opt<bool> RelaxELFRel( 56 "relax-relocations", cl::init(true), 57 cl::desc("Emit R_X86_64_GOTPCRELX instead of R_X86_64_GOTPCREL")); 58 59 static cl::opt<DebugCompressionType> CompressDebugSections( 60 "compress-debug-sections", cl::ValueOptional, 61 cl::init(DebugCompressionType::None), 62 cl::desc("Choose DWARF debug sections compression:"), 63 cl::values(clEnumValN(DebugCompressionType::None, "none", "No compression"), 64 clEnumValN(DebugCompressionType::Z, "zlib", 65 "Use zlib compression"), 66 clEnumValN(DebugCompressionType::GNU, "zlib-gnu", 67 "Use zlib-gnu compression (deprecated)"))); 68 69 static cl::opt<bool> 70 ShowInst("show-inst", cl::desc("Show internal instruction representation")); 71 72 static cl::opt<bool> 73 ShowInstOperands("show-inst-operands", 74 cl::desc("Show instructions operands as parsed")); 75 76 static cl::opt<unsigned> 77 OutputAsmVariant("output-asm-variant", 78 cl::desc("Syntax variant to use for output printing")); 79 80 static cl::opt<bool> 81 PrintImmHex("print-imm-hex", cl::init(false), 82 cl::desc("Prefer hex format for immediate values")); 83 84 static cl::list<std::string> 85 DefineSymbol("defsym", cl::desc("Defines a symbol to be an integer constant")); 86 87 static cl::opt<bool> 88 PreserveComments("preserve-comments", 89 cl::desc("Preserve Comments in outputted assembly")); 90 91 enum OutputFileType { 92 OFT_Null, 93 OFT_AssemblyFile, 94 OFT_ObjectFile 95 }; 96 static cl::opt<OutputFileType> 97 FileType("filetype", cl::init(OFT_AssemblyFile), 98 cl::desc("Choose an output file type:"), 99 cl::values( 100 clEnumValN(OFT_AssemblyFile, "asm", 101 "Emit an assembly ('.s') file"), 102 clEnumValN(OFT_Null, "null", 103 "Don't emit anything (for timing purposes)"), 104 clEnumValN(OFT_ObjectFile, "obj", 105 "Emit a native object ('.o') file"))); 106 107 static cl::list<std::string> 108 IncludeDirs("I", cl::desc("Directory of include files"), 109 cl::value_desc("directory"), cl::Prefix); 110 111 static cl::opt<std::string> 112 ArchName("arch", cl::desc("Target arch to assemble for, " 113 "see -version for available targets")); 114 115 static cl::opt<std::string> 116 TripleName("triple", cl::desc("Target triple to assemble for, " 117 "see -version for available targets")); 118 119 static cl::opt<std::string> 120 MCPU("mcpu", 121 cl::desc("Target a specific cpu type (-mcpu=help for details)"), 122 cl::value_desc("cpu-name"), 123 cl::init("")); 124 125 static cl::list<std::string> 126 MAttrs("mattr", 127 cl::CommaSeparated, 128 cl::desc("Target specific attributes (-mattr=help for details)"), 129 cl::value_desc("a1,+a2,-a3,...")); 130 131 static cl::opt<bool> PIC("position-independent", 132 cl::desc("Position independent"), cl::init(false)); 133 134 static cl::opt<bool> 135 LargeCodeModel("large-code-model", 136 cl::desc("Create cfi directives that assume the code might " 137 "be more than 2gb away")); 138 139 static cl::opt<bool> 140 NoInitialTextSection("n", cl::desc("Don't assume assembly file starts " 141 "in the text section")); 142 143 static cl::opt<bool> 144 GenDwarfForAssembly("g", cl::desc("Generate dwarf debugging info for assembly " 145 "source files")); 146 147 static cl::opt<std::string> 148 DebugCompilationDir("fdebug-compilation-dir", 149 cl::desc("Specifies the debug info's compilation dir")); 150 151 static cl::opt<std::string> 152 MainFileName("main-file-name", 153 cl::desc("Specifies the name we should consider the input file")); 154 155 static cl::opt<bool> SaveTempLabels("save-temp-labels", 156 cl::desc("Don't discard temporary labels")); 157 158 static cl::opt<bool> NoExecStack("no-exec-stack", 159 cl::desc("File doesn't need an exec stack")); 160 161 enum ActionType { 162 AC_AsLex, 163 AC_Assemble, 164 AC_Disassemble, 165 AC_MDisassemble, 166 }; 167 168 static cl::opt<ActionType> 169 Action(cl::desc("Action to perform:"), 170 cl::init(AC_Assemble), 171 cl::values(clEnumValN(AC_AsLex, "as-lex", 172 "Lex tokens from a .s file"), 173 clEnumValN(AC_Assemble, "assemble", 174 "Assemble a .s file (default)"), 175 clEnumValN(AC_Disassemble, "disassemble", 176 "Disassemble strings of hex bytes"), 177 clEnumValN(AC_MDisassemble, "mdis", 178 "Marked up disassembly of strings of hex bytes"))); 179 180 static const Target *GetTarget(const char *ProgName) { 181 // Figure out the target triple. 182 if (TripleName.empty()) 183 TripleName = sys::getDefaultTargetTriple(); 184 Triple TheTriple(Triple::normalize(TripleName)); 185 186 // Get the target specific parser. 187 std::string Error; 188 const Target *TheTarget = TargetRegistry::lookupTarget(ArchName, TheTriple, 189 Error); 190 if (!TheTarget) { 191 errs() << ProgName << ": " << Error; 192 return nullptr; 193 } 194 195 // Update the triple name and return the found target. 196 TripleName = TheTriple.getTriple(); 197 return TheTarget; 198 } 199 200 static std::unique_ptr<ToolOutputFile> GetOutputStream() { 201 if (OutputFilename == "") 202 OutputFilename = "-"; 203 204 std::error_code EC; 205 auto Out = 206 llvm::make_unique<ToolOutputFile>(OutputFilename, EC, sys::fs::F_None); 207 if (EC) { 208 errs() << EC.message() << '\n'; 209 return nullptr; 210 } 211 212 return Out; 213 } 214 215 static std::string DwarfDebugFlags; 216 static void setDwarfDebugFlags(int argc, char **argv) { 217 if (!getenv("RC_DEBUG_OPTIONS")) 218 return; 219 for (int i = 0; i < argc; i++) { 220 DwarfDebugFlags += argv[i]; 221 if (i + 1 < argc) 222 DwarfDebugFlags += " "; 223 } 224 } 225 226 static std::string DwarfDebugProducer; 227 static void setDwarfDebugProducer() { 228 if(!getenv("DEBUG_PRODUCER")) 229 return; 230 DwarfDebugProducer += getenv("DEBUG_PRODUCER"); 231 } 232 233 static int AsLexInput(SourceMgr &SrcMgr, MCAsmInfo &MAI, 234 raw_ostream &OS) { 235 236 AsmLexer Lexer(MAI); 237 Lexer.setBuffer(SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID())->getBuffer()); 238 239 bool Error = false; 240 while (Lexer.Lex().isNot(AsmToken::Eof)) { 241 const AsmToken &Tok = Lexer.getTok(); 242 243 switch (Tok.getKind()) { 244 default: 245 SrcMgr.PrintMessage(Lexer.getLoc(), SourceMgr::DK_Warning, 246 "unknown token"); 247 Error = true; 248 break; 249 case AsmToken::Error: 250 Error = true; // error already printed. 251 break; 252 case AsmToken::Identifier: 253 OS << "identifier: " << Lexer.getTok().getString(); 254 break; 255 case AsmToken::Integer: 256 OS << "int: " << Lexer.getTok().getString(); 257 break; 258 case AsmToken::Real: 259 OS << "real: " << Lexer.getTok().getString(); 260 break; 261 case AsmToken::String: 262 OS << "string: " << Lexer.getTok().getString(); 263 break; 264 265 case AsmToken::Amp: OS << "Amp"; break; 266 case AsmToken::AmpAmp: OS << "AmpAmp"; break; 267 case AsmToken::At: OS << "At"; break; 268 case AsmToken::Caret: OS << "Caret"; break; 269 case AsmToken::Colon: OS << "Colon"; break; 270 case AsmToken::Comma: OS << "Comma"; break; 271 case AsmToken::Dollar: OS << "Dollar"; break; 272 case AsmToken::Dot: OS << "Dot"; break; 273 case AsmToken::EndOfStatement: OS << "EndOfStatement"; break; 274 case AsmToken::Eof: OS << "Eof"; break; 275 case AsmToken::Equal: OS << "Equal"; break; 276 case AsmToken::EqualEqual: OS << "EqualEqual"; break; 277 case AsmToken::Exclaim: OS << "Exclaim"; break; 278 case AsmToken::ExclaimEqual: OS << "ExclaimEqual"; break; 279 case AsmToken::Greater: OS << "Greater"; break; 280 case AsmToken::GreaterEqual: OS << "GreaterEqual"; break; 281 case AsmToken::GreaterGreater: OS << "GreaterGreater"; break; 282 case AsmToken::Hash: OS << "Hash"; break; 283 case AsmToken::LBrac: OS << "LBrac"; break; 284 case AsmToken::LCurly: OS << "LCurly"; break; 285 case AsmToken::LParen: OS << "LParen"; break; 286 case AsmToken::Less: OS << "Less"; break; 287 case AsmToken::LessEqual: OS << "LessEqual"; break; 288 case AsmToken::LessGreater: OS << "LessGreater"; break; 289 case AsmToken::LessLess: OS << "LessLess"; break; 290 case AsmToken::Minus: OS << "Minus"; break; 291 case AsmToken::Percent: OS << "Percent"; break; 292 case AsmToken::Pipe: OS << "Pipe"; break; 293 case AsmToken::PipePipe: OS << "PipePipe"; break; 294 case AsmToken::Plus: OS << "Plus"; break; 295 case AsmToken::RBrac: OS << "RBrac"; break; 296 case AsmToken::RCurly: OS << "RCurly"; break; 297 case AsmToken::RParen: OS << "RParen"; break; 298 case AsmToken::Slash: OS << "Slash"; break; 299 case AsmToken::Star: OS << "Star"; break; 300 case AsmToken::Tilde: OS << "Tilde"; break; 301 case AsmToken::PercentCall16: 302 OS << "PercentCall16"; 303 break; 304 case AsmToken::PercentCall_Hi: 305 OS << "PercentCall_Hi"; 306 break; 307 case AsmToken::PercentCall_Lo: 308 OS << "PercentCall_Lo"; 309 break; 310 case AsmToken::PercentDtprel_Hi: 311 OS << "PercentDtprel_Hi"; 312 break; 313 case AsmToken::PercentDtprel_Lo: 314 OS << "PercentDtprel_Lo"; 315 break; 316 case AsmToken::PercentGot: 317 OS << "PercentGot"; 318 break; 319 case AsmToken::PercentGot_Disp: 320 OS << "PercentGot_Disp"; 321 break; 322 case AsmToken::PercentGot_Hi: 323 OS << "PercentGot_Hi"; 324 break; 325 case AsmToken::PercentGot_Lo: 326 OS << "PercentGot_Lo"; 327 break; 328 case AsmToken::PercentGot_Ofst: 329 OS << "PercentGot_Ofst"; 330 break; 331 case AsmToken::PercentGot_Page: 332 OS << "PercentGot_Page"; 333 break; 334 case AsmToken::PercentGottprel: 335 OS << "PercentGottprel"; 336 break; 337 case AsmToken::PercentGp_Rel: 338 OS << "PercentGp_Rel"; 339 break; 340 case AsmToken::PercentHi: 341 OS << "PercentHi"; 342 break; 343 case AsmToken::PercentHigher: 344 OS << "PercentHigher"; 345 break; 346 case AsmToken::PercentHighest: 347 OS << "PercentHighest"; 348 break; 349 case AsmToken::PercentLo: 350 OS << "PercentLo"; 351 break; 352 case AsmToken::PercentNeg: 353 OS << "PercentNeg"; 354 break; 355 case AsmToken::PercentPcrel_Hi: 356 OS << "PercentPcrel_Hi"; 357 break; 358 case AsmToken::PercentPcrel_Lo: 359 OS << "PercentPcrel_Lo"; 360 break; 361 case AsmToken::PercentTlsgd: 362 OS << "PercentTlsgd"; 363 break; 364 case AsmToken::PercentTlsldm: 365 OS << "PercentTlsldm"; 366 break; 367 case AsmToken::PercentTprel_Hi: 368 OS << "PercentTprel_Hi"; 369 break; 370 case AsmToken::PercentTprel_Lo: 371 OS << "PercentTprel_Lo"; 372 break; 373 } 374 375 // Print the token string. 376 OS << " (\""; 377 OS.write_escaped(Tok.getString()); 378 OS << "\")\n"; 379 } 380 381 return Error; 382 } 383 384 static int fillCommandLineSymbols(MCAsmParser &Parser) { 385 for (auto &I: DefineSymbol) { 386 auto Pair = StringRef(I).split('='); 387 auto Sym = Pair.first; 388 auto Val = Pair.second; 389 390 if (Sym.empty() || Val.empty()) { 391 errs() << "error: defsym must be of the form: sym=value: " << I << "\n"; 392 return 1; 393 } 394 int64_t Value; 395 if (Val.getAsInteger(0, Value)) { 396 errs() << "error: Value is not an integer: " << Val << "\n"; 397 return 1; 398 } 399 Parser.getContext().setSymbolValue(Parser.getStreamer(), Sym, Value); 400 } 401 return 0; 402 } 403 404 static int AssembleInput(const char *ProgName, const Target *TheTarget, 405 SourceMgr &SrcMgr, MCContext &Ctx, MCStreamer &Str, 406 MCAsmInfo &MAI, MCSubtargetInfo &STI, 407 MCInstrInfo &MCII, MCTargetOptions &MCOptions) { 408 std::unique_ptr<MCAsmParser> Parser( 409 createMCAsmParser(SrcMgr, Ctx, Str, MAI)); 410 std::unique_ptr<MCTargetAsmParser> TAP( 411 TheTarget->createMCAsmParser(STI, *Parser, MCII, MCOptions)); 412 413 if (!TAP) { 414 errs() << ProgName 415 << ": error: this target does not support assembly parsing.\n"; 416 return 1; 417 } 418 419 int SymbolResult = fillCommandLineSymbols(*Parser); 420 if(SymbolResult) 421 return SymbolResult; 422 Parser->setShowParsedOperands(ShowInstOperands); 423 Parser->setTargetParser(*TAP); 424 425 int Res = Parser->Run(NoInitialTextSection); 426 427 return Res; 428 } 429 430 int main(int argc, char **argv) { 431 // Print a stack trace if we signal out. 432 sys::PrintStackTraceOnErrorSignal(argv[0]); 433 PrettyStackTraceProgram X(argc, argv); 434 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. 435 436 // Initialize targets and assembly printers/parsers. 437 llvm::InitializeAllTargetInfos(); 438 llvm::InitializeAllTargetMCs(); 439 llvm::InitializeAllAsmParsers(); 440 llvm::InitializeAllDisassemblers(); 441 442 // Register the target printer for --version. 443 cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion); 444 445 cl::ParseCommandLineOptions(argc, argv, "llvm machine code playground\n"); 446 MCTargetOptions MCOptions = InitMCTargetOptionsFromFlags(); 447 TripleName = Triple::normalize(TripleName); 448 setDwarfDebugFlags(argc, argv); 449 450 setDwarfDebugProducer(); 451 452 const char *ProgName = argv[0]; 453 const Target *TheTarget = GetTarget(ProgName); 454 if (!TheTarget) 455 return 1; 456 // Now that GetTarget() has (potentially) replaced TripleName, it's safe to 457 // construct the Triple object. 458 Triple TheTriple(TripleName); 459 460 ErrorOr<std::unique_ptr<MemoryBuffer>> BufferPtr = 461 MemoryBuffer::getFileOrSTDIN(InputFilename); 462 if (std::error_code EC = BufferPtr.getError()) { 463 errs() << InputFilename << ": " << EC.message() << '\n'; 464 return 1; 465 } 466 MemoryBuffer *Buffer = BufferPtr->get(); 467 468 SourceMgr SrcMgr; 469 470 // Tell SrcMgr about this buffer, which is what the parser will pick up. 471 SrcMgr.AddNewSourceBuffer(std::move(*BufferPtr), SMLoc()); 472 473 // Record the location of the include directories so that the lexer can find 474 // it later. 475 SrcMgr.setIncludeDirs(IncludeDirs); 476 477 std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName)); 478 assert(MRI && "Unable to create target register info!"); 479 480 std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName)); 481 assert(MAI && "Unable to create target asm info!"); 482 483 MAI->setRelaxELFRelocations(RelaxELFRel); 484 485 if (CompressDebugSections != DebugCompressionType::None) { 486 if (!zlib::isAvailable()) { 487 errs() << ProgName 488 << ": build tools with zlib to enable -compress-debug-sections"; 489 return 1; 490 } 491 MAI->setCompressDebugSections(CompressDebugSections); 492 } 493 MAI->setPreserveAsmComments(PreserveComments); 494 495 // FIXME: This is not pretty. MCContext has a ptr to MCObjectFileInfo and 496 // MCObjectFileInfo needs a MCContext reference in order to initialize itself. 497 MCObjectFileInfo MOFI; 498 MCContext Ctx(MAI.get(), MRI.get(), &MOFI, &SrcMgr); 499 MOFI.InitMCObjectFileInfo(TheTriple, PIC, Ctx, LargeCodeModel); 500 501 if (SaveTempLabels) 502 Ctx.setAllowTemporaryLabels(false); 503 504 Ctx.setGenDwarfForAssembly(GenDwarfForAssembly); 505 // Default to 4 for dwarf version. 506 unsigned DwarfVersion = MCOptions.DwarfVersion ? MCOptions.DwarfVersion : 4; 507 if (DwarfVersion < 2 || DwarfVersion > 5) { 508 errs() << ProgName << ": Dwarf version " << DwarfVersion 509 << " is not supported." << '\n'; 510 return 1; 511 } 512 Ctx.setDwarfVersion(DwarfVersion); 513 if (!DwarfDebugFlags.empty()) 514 Ctx.setDwarfDebugFlags(StringRef(DwarfDebugFlags)); 515 if (!DwarfDebugProducer.empty()) 516 Ctx.setDwarfDebugProducer(StringRef(DwarfDebugProducer)); 517 if (!DebugCompilationDir.empty()) 518 Ctx.setCompilationDir(DebugCompilationDir); 519 else { 520 // If no compilation dir is set, try to use the current directory. 521 SmallString<128> CWD; 522 if (!sys::fs::current_path(CWD)) 523 Ctx.setCompilationDir(CWD); 524 } 525 if (!MainFileName.empty()) 526 Ctx.setMainFileName(MainFileName); 527 528 // Package up features to be passed to target/subtarget 529 std::string FeaturesStr; 530 if (MAttrs.size()) { 531 SubtargetFeatures Features; 532 for (unsigned i = 0; i != MAttrs.size(); ++i) 533 Features.AddFeature(MAttrs[i]); 534 FeaturesStr = Features.getString(); 535 } 536 537 std::unique_ptr<ToolOutputFile> Out = GetOutputStream(); 538 if (!Out) 539 return 1; 540 541 std::unique_ptr<buffer_ostream> BOS; 542 raw_pwrite_stream *OS = &Out->os(); 543 std::unique_ptr<MCStreamer> Str; 544 545 std::unique_ptr<MCInstrInfo> MCII(TheTarget->createMCInstrInfo()); 546 std::unique_ptr<MCSubtargetInfo> STI( 547 TheTarget->createMCSubtargetInfo(TripleName, MCPU, FeaturesStr)); 548 549 MCInstPrinter *IP = nullptr; 550 if (FileType == OFT_AssemblyFile) { 551 IP = TheTarget->createMCInstPrinter(Triple(TripleName), OutputAsmVariant, 552 *MAI, *MCII, *MRI); 553 554 if (!IP) { 555 errs() 556 << "error: unable to create instruction printer for target triple '" 557 << TheTriple.normalize() << "' with assembly variant " 558 << OutputAsmVariant << ".\n"; 559 return 1; 560 } 561 562 // Set the display preference for hex vs. decimal immediates. 563 IP->setPrintImmHex(PrintImmHex); 564 565 // Set up the AsmStreamer. 566 MCCodeEmitter *CE = nullptr; 567 MCAsmBackend *MAB = nullptr; 568 if (ShowEncoding) { 569 CE = TheTarget->createMCCodeEmitter(*MCII, *MRI, Ctx); 570 MAB = TheTarget->createMCAsmBackend(*MRI, TripleName, MCPU, MCOptions); 571 } 572 auto FOut = llvm::make_unique<formatted_raw_ostream>(*OS); 573 Str.reset(TheTarget->createAsmStreamer( 574 Ctx, std::move(FOut), /*asmverbose*/ true, 575 /*useDwarfDirectory*/ true, IP, CE, MAB, ShowInst)); 576 577 } else if (FileType == OFT_Null) { 578 Str.reset(TheTarget->createNullStreamer(Ctx)); 579 } else { 580 assert(FileType == OFT_ObjectFile && "Invalid file type!"); 581 582 // Don't waste memory on names of temp labels. 583 Ctx.setUseNamesOnTempLabels(false); 584 585 if (!Out->os().supportsSeeking()) { 586 BOS = make_unique<buffer_ostream>(Out->os()); 587 OS = BOS.get(); 588 } 589 590 MCCodeEmitter *CE = TheTarget->createMCCodeEmitter(*MCII, *MRI, Ctx); 591 MCAsmBackend *MAB = TheTarget->createMCAsmBackend(*MRI, TripleName, MCPU, 592 MCOptions); 593 Str.reset(TheTarget->createMCObjectStreamer( 594 TheTriple, Ctx, *MAB, *OS, CE, *STI, MCOptions.MCRelaxAll, 595 MCOptions.MCIncrementalLinkerCompatible, 596 /*DWARFMustBeAtTheEnd*/ false)); 597 if (NoExecStack) 598 Str->InitSections(true); 599 } 600 601 int Res = 1; 602 bool disassemble = false; 603 switch (Action) { 604 case AC_AsLex: 605 Res = AsLexInput(SrcMgr, *MAI, Out->os()); 606 break; 607 case AC_Assemble: 608 Res = AssembleInput(ProgName, TheTarget, SrcMgr, Ctx, *Str, *MAI, *STI, 609 *MCII, MCOptions); 610 break; 611 case AC_MDisassemble: 612 assert(IP && "Expected assembly output"); 613 IP->setUseMarkup(1); 614 disassemble = true; 615 break; 616 case AC_Disassemble: 617 disassemble = true; 618 break; 619 } 620 if (disassemble) 621 Res = Disassembler::disassemble(*TheTarget, TripleName, *STI, *Str, 622 *Buffer, SrcMgr, Out->os()); 623 624 // Keep output if no errors. 625 if (Res == 0) Out->keep(); 626 return Res; 627 } 628