1 //===-- llvm-mc.cpp - Machine Code Hacking Driver ---------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This utility is a simple driver that allows command line hacking on machine 10 // code. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "Disassembler.h" 15 #include "llvm/MC/MCAsmBackend.h" 16 #include "llvm/MC/MCAsmInfo.h" 17 #include "llvm/MC/MCCodeEmitter.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/MCObjectWriter.h" 23 #include "llvm/MC/MCParser/AsmLexer.h" 24 #include "llvm/MC/MCParser/MCTargetAsmParser.h" 25 #include "llvm/MC/MCRegisterInfo.h" 26 #include "llvm/MC/MCStreamer.h" 27 #include "llvm/MC/MCSubtargetInfo.h" 28 #include "llvm/MC/MCTargetOptionsCommandFlags.h" 29 #include "llvm/MC/TargetRegistry.h" 30 #include "llvm/Support/CommandLine.h" 31 #include "llvm/Support/Compression.h" 32 #include "llvm/Support/FileUtilities.h" 33 #include "llvm/Support/FormattedStream.h" 34 #include "llvm/Support/Host.h" 35 #include "llvm/Support/InitLLVM.h" 36 #include "llvm/Support/MemoryBuffer.h" 37 #include "llvm/Support/SourceMgr.h" 38 #include "llvm/Support/TargetSelect.h" 39 #include "llvm/Support/ToolOutputFile.h" 40 #include "llvm/Support/WithColor.h" 41 42 using namespace llvm; 43 44 static mc::RegisterMCTargetOptionsFlags MOF; 45 46 static cl::OptionCategory MCCategory("MC Options"); 47 48 static cl::opt<std::string> InputFilename(cl::Positional, 49 cl::desc("<input file>"), 50 cl::init("-"), cl::cat(MCCategory)); 51 52 static cl::list<std::string> 53 DisassemblerOptions("M", cl::desc("Disassembler options"), 54 cl::cat(MCCategory)); 55 56 static cl::opt<std::string> OutputFilename("o", cl::desc("Output filename"), 57 cl::value_desc("filename"), 58 cl::init("-"), cl::cat(MCCategory)); 59 60 static cl::opt<std::string> SplitDwarfFile("split-dwarf-file", 61 cl::desc("DWO output filename"), 62 cl::value_desc("filename"), 63 cl::cat(MCCategory)); 64 65 static cl::opt<bool> ShowEncoding("show-encoding", 66 cl::desc("Show instruction encodings"), 67 cl::cat(MCCategory)); 68 69 static cl::opt<bool> RelaxELFRel( 70 "relax-relocations", cl::init(true), 71 cl::desc("Emit R_X86_64_GOTPCRELX instead of R_X86_64_GOTPCREL"), 72 cl::cat(MCCategory)); 73 74 static cl::opt<DebugCompressionType> CompressDebugSections( 75 "compress-debug-sections", cl::ValueOptional, 76 cl::init(DebugCompressionType::None), 77 cl::desc("Choose DWARF debug sections compression:"), 78 cl::values(clEnumValN(DebugCompressionType::None, "none", "No compression"), 79 clEnumValN(DebugCompressionType::Z, "zlib", 80 "Use zlib compression"), 81 clEnumValN(DebugCompressionType::GNU, "zlib-gnu", 82 "Use zlib-gnu compression (deprecated)")), 83 cl::cat(MCCategory)); 84 85 static cl::opt<bool> 86 ShowInst("show-inst", cl::desc("Show internal instruction representation"), 87 cl::cat(MCCategory)); 88 89 static cl::opt<bool> 90 ShowInstOperands("show-inst-operands", 91 cl::desc("Show instructions operands as parsed"), 92 cl::cat(MCCategory)); 93 94 static cl::opt<unsigned> 95 OutputAsmVariant("output-asm-variant", 96 cl::desc("Syntax variant to use for output printing"), 97 cl::cat(MCCategory)); 98 99 static cl::opt<bool> 100 PrintImmHex("print-imm-hex", cl::init(false), 101 cl::desc("Prefer hex format for immediate values"), 102 cl::cat(MCCategory)); 103 104 static cl::list<std::string> 105 DefineSymbol("defsym", 106 cl::desc("Defines a symbol to be an integer constant"), 107 cl::cat(MCCategory)); 108 109 static cl::opt<bool> 110 PreserveComments("preserve-comments", 111 cl::desc("Preserve Comments in outputted assembly"), 112 cl::cat(MCCategory)); 113 114 enum OutputFileType { 115 OFT_Null, 116 OFT_AssemblyFile, 117 OFT_ObjectFile 118 }; 119 static cl::opt<OutputFileType> 120 FileType("filetype", cl::init(OFT_AssemblyFile), 121 cl::desc("Choose an output file type:"), 122 cl::values(clEnumValN(OFT_AssemblyFile, "asm", 123 "Emit an assembly ('.s') file"), 124 clEnumValN(OFT_Null, "null", 125 "Don't emit anything (for timing purposes)"), 126 clEnumValN(OFT_ObjectFile, "obj", 127 "Emit a native object ('.o') file")), 128 cl::cat(MCCategory)); 129 130 static cl::list<std::string> IncludeDirs("I", 131 cl::desc("Directory of include files"), 132 cl::value_desc("directory"), 133 cl::Prefix, cl::cat(MCCategory)); 134 135 static cl::opt<std::string> 136 ArchName("arch", 137 cl::desc("Target arch to assemble for, " 138 "see -version for available targets"), 139 cl::cat(MCCategory)); 140 141 static cl::opt<std::string> 142 TripleName("triple", 143 cl::desc("Target triple to assemble for, " 144 "see -version for available targets"), 145 cl::cat(MCCategory)); 146 147 static cl::opt<std::string> 148 MCPU("mcpu", 149 cl::desc("Target a specific cpu type (-mcpu=help for details)"), 150 cl::value_desc("cpu-name"), cl::init(""), cl::cat(MCCategory)); 151 152 static cl::list<std::string> 153 MAttrs("mattr", cl::CommaSeparated, 154 cl::desc("Target specific attributes (-mattr=help for details)"), 155 cl::value_desc("a1,+a2,-a3,..."), cl::cat(MCCategory)); 156 157 static cl::opt<bool> PIC("position-independent", 158 cl::desc("Position independent"), cl::init(false), 159 cl::cat(MCCategory)); 160 161 static cl::opt<bool> 162 LargeCodeModel("large-code-model", 163 cl::desc("Create cfi directives that assume the code might " 164 "be more than 2gb away"), 165 cl::cat(MCCategory)); 166 167 static cl::opt<bool> 168 NoInitialTextSection("n", 169 cl::desc("Don't assume assembly file starts " 170 "in the text section"), 171 cl::cat(MCCategory)); 172 173 static cl::opt<bool> 174 GenDwarfForAssembly("g", 175 cl::desc("Generate dwarf debugging info for assembly " 176 "source files"), 177 cl::cat(MCCategory)); 178 179 static cl::opt<std::string> 180 DebugCompilationDir("fdebug-compilation-dir", 181 cl::desc("Specifies the debug info's compilation dir"), 182 cl::cat(MCCategory)); 183 184 static cl::list<std::string> DebugPrefixMap( 185 "fdebug-prefix-map", cl::desc("Map file source paths in debug info"), 186 cl::value_desc("= separated key-value pairs"), cl::cat(MCCategory)); 187 188 static cl::opt<std::string> MainFileName( 189 "main-file-name", 190 cl::desc("Specifies the name we should consider the input file"), 191 cl::cat(MCCategory)); 192 193 static cl::opt<bool> SaveTempLabels("save-temp-labels", 194 cl::desc("Don't discard temporary labels"), 195 cl::cat(MCCategory)); 196 197 static cl::opt<bool> LexMasmIntegers( 198 "masm-integers", 199 cl::desc("Enable binary and hex masm integers (0b110 and 0ABCh)"), 200 cl::cat(MCCategory)); 201 202 static cl::opt<bool> LexMasmHexFloats( 203 "masm-hexfloats", 204 cl::desc("Enable MASM-style hex float initializers (3F800000r)"), 205 cl::cat(MCCategory)); 206 207 static cl::opt<bool> LexMotorolaIntegers( 208 "motorola-integers", 209 cl::desc("Enable binary and hex Motorola integers (%110 and $ABC)"), 210 cl::cat(MCCategory)); 211 212 static cl::opt<bool> NoExecStack("no-exec-stack", 213 cl::desc("File doesn't need an exec stack"), 214 cl::cat(MCCategory)); 215 216 enum ActionType { 217 AC_AsLex, 218 AC_Assemble, 219 AC_Disassemble, 220 AC_MDisassemble, 221 }; 222 223 static cl::opt<ActionType> Action( 224 cl::desc("Action to perform:"), cl::init(AC_Assemble), 225 cl::values(clEnumValN(AC_AsLex, "as-lex", "Lex tokens from a .s file"), 226 clEnumValN(AC_Assemble, "assemble", 227 "Assemble a .s file (default)"), 228 clEnumValN(AC_Disassemble, "disassemble", 229 "Disassemble strings of hex bytes"), 230 clEnumValN(AC_MDisassemble, "mdis", 231 "Marked up disassembly of strings of hex bytes")), 232 cl::cat(MCCategory)); 233 234 static const Target *GetTarget(const char *ProgName) { 235 // Figure out the target triple. 236 if (TripleName.empty()) 237 TripleName = sys::getDefaultTargetTriple(); 238 Triple TheTriple(Triple::normalize(TripleName)); 239 240 // Get the target specific parser. 241 std::string Error; 242 const Target *TheTarget = TargetRegistry::lookupTarget(ArchName, TheTriple, 243 Error); 244 if (!TheTarget) { 245 WithColor::error(errs(), ProgName) << Error; 246 return nullptr; 247 } 248 249 // Update the triple name and return the found target. 250 TripleName = TheTriple.getTriple(); 251 return TheTarget; 252 } 253 254 static std::unique_ptr<ToolOutputFile> GetOutputStream(StringRef Path, 255 sys::fs::OpenFlags Flags) { 256 std::error_code EC; 257 auto Out = std::make_unique<ToolOutputFile>(Path, EC, Flags); 258 if (EC) { 259 WithColor::error() << EC.message() << '\n'; 260 return nullptr; 261 } 262 263 return Out; 264 } 265 266 static std::string DwarfDebugFlags; 267 static void setDwarfDebugFlags(int argc, char **argv) { 268 if (!getenv("RC_DEBUG_OPTIONS")) 269 return; 270 for (int i = 0; i < argc; i++) { 271 DwarfDebugFlags += argv[i]; 272 if (i + 1 < argc) 273 DwarfDebugFlags += " "; 274 } 275 } 276 277 static std::string DwarfDebugProducer; 278 static void setDwarfDebugProducer() { 279 if(!getenv("DEBUG_PRODUCER")) 280 return; 281 DwarfDebugProducer += getenv("DEBUG_PRODUCER"); 282 } 283 284 static int AsLexInput(SourceMgr &SrcMgr, MCAsmInfo &MAI, 285 raw_ostream &OS) { 286 287 AsmLexer Lexer(MAI); 288 Lexer.setBuffer(SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID())->getBuffer()); 289 290 bool Error = false; 291 while (Lexer.Lex().isNot(AsmToken::Eof)) { 292 Lexer.getTok().dump(OS); 293 OS << "\n"; 294 if (Lexer.getTok().getKind() == AsmToken::Error) 295 Error = true; 296 } 297 298 return Error; 299 } 300 301 static int fillCommandLineSymbols(MCAsmParser &Parser) { 302 for (auto &I: DefineSymbol) { 303 auto Pair = StringRef(I).split('='); 304 auto Sym = Pair.first; 305 auto Val = Pair.second; 306 307 if (Sym.empty() || Val.empty()) { 308 WithColor::error() << "defsym must be of the form: sym=value: " << I 309 << "\n"; 310 return 1; 311 } 312 int64_t Value; 313 if (Val.getAsInteger(0, Value)) { 314 WithColor::error() << "value is not an integer: " << Val << "\n"; 315 return 1; 316 } 317 Parser.getContext().setSymbolValue(Parser.getStreamer(), Sym, Value); 318 } 319 return 0; 320 } 321 322 static int AssembleInput(const char *ProgName, const Target *TheTarget, 323 SourceMgr &SrcMgr, MCContext &Ctx, MCStreamer &Str, 324 MCAsmInfo &MAI, MCSubtargetInfo &STI, 325 MCInstrInfo &MCII, MCTargetOptions const &MCOptions) { 326 std::unique_ptr<MCAsmParser> Parser( 327 createMCAsmParser(SrcMgr, Ctx, Str, MAI)); 328 std::unique_ptr<MCTargetAsmParser> TAP( 329 TheTarget->createMCAsmParser(STI, *Parser, MCII, MCOptions)); 330 331 if (!TAP) { 332 WithColor::error(errs(), ProgName) 333 << "this target does not support assembly parsing.\n"; 334 return 1; 335 } 336 337 int SymbolResult = fillCommandLineSymbols(*Parser); 338 if(SymbolResult) 339 return SymbolResult; 340 Parser->setShowParsedOperands(ShowInstOperands); 341 Parser->setTargetParser(*TAP); 342 Parser->getLexer().setLexMasmIntegers(LexMasmIntegers); 343 Parser->getLexer().setLexMasmHexFloats(LexMasmHexFloats); 344 Parser->getLexer().setLexMotorolaIntegers(LexMotorolaIntegers); 345 346 int Res = Parser->Run(NoInitialTextSection); 347 348 return Res; 349 } 350 351 int main(int argc, char **argv) { 352 InitLLVM X(argc, argv); 353 354 // Initialize targets and assembly printers/parsers. 355 llvm::InitializeAllTargetInfos(); 356 llvm::InitializeAllTargetMCs(); 357 llvm::InitializeAllAsmParsers(); 358 llvm::InitializeAllDisassemblers(); 359 360 // Register the target printer for --version. 361 cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion); 362 363 cl::HideUnrelatedOptions({&MCCategory, &getColorCategory()}); 364 cl::ParseCommandLineOptions(argc, argv, "llvm machine code playground\n"); 365 const MCTargetOptions MCOptions = mc::InitMCTargetOptionsFromFlags(); 366 setDwarfDebugFlags(argc, argv); 367 368 setDwarfDebugProducer(); 369 370 const char *ProgName = argv[0]; 371 const Target *TheTarget = GetTarget(ProgName); 372 if (!TheTarget) 373 return 1; 374 // Now that GetTarget() has (potentially) replaced TripleName, it's safe to 375 // construct the Triple object. 376 Triple TheTriple(TripleName); 377 378 ErrorOr<std::unique_ptr<MemoryBuffer>> BufferPtr = 379 MemoryBuffer::getFileOrSTDIN(InputFilename, /*IsText=*/true); 380 if (std::error_code EC = BufferPtr.getError()) { 381 WithColor::error(errs(), ProgName) 382 << InputFilename << ": " << EC.message() << '\n'; 383 return 1; 384 } 385 MemoryBuffer *Buffer = BufferPtr->get(); 386 387 SourceMgr SrcMgr; 388 389 // Tell SrcMgr about this buffer, which is what the parser will pick up. 390 SrcMgr.AddNewSourceBuffer(std::move(*BufferPtr), SMLoc()); 391 392 // Record the location of the include directories so that the lexer can find 393 // it later. 394 SrcMgr.setIncludeDirs(IncludeDirs); 395 396 std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName)); 397 assert(MRI && "Unable to create target register info!"); 398 399 std::unique_ptr<MCAsmInfo> MAI( 400 TheTarget->createMCAsmInfo(*MRI, TripleName, MCOptions)); 401 assert(MAI && "Unable to create target asm info!"); 402 403 MAI->setRelaxELFRelocations(RelaxELFRel); 404 405 if (CompressDebugSections != DebugCompressionType::None) { 406 if (!zlib::isAvailable()) { 407 WithColor::error(errs(), ProgName) 408 << "build tools with zlib to enable -compress-debug-sections"; 409 return 1; 410 } 411 MAI->setCompressDebugSections(CompressDebugSections); 412 } 413 MAI->setPreserveAsmComments(PreserveComments); 414 415 // Package up features to be passed to target/subtarget 416 std::string FeaturesStr; 417 if (MAttrs.size()) { 418 SubtargetFeatures Features; 419 for (unsigned i = 0; i != MAttrs.size(); ++i) 420 Features.AddFeature(MAttrs[i]); 421 FeaturesStr = Features.getString(); 422 } 423 424 std::unique_ptr<MCSubtargetInfo> STI( 425 TheTarget->createMCSubtargetInfo(TripleName, MCPU, FeaturesStr)); 426 assert(STI && "Unable to create subtarget info!"); 427 428 // FIXME: This is not pretty. MCContext has a ptr to MCObjectFileInfo and 429 // MCObjectFileInfo needs a MCContext reference in order to initialize itself. 430 MCContext Ctx(TheTriple, MAI.get(), MRI.get(), STI.get(), &SrcMgr, 431 &MCOptions); 432 std::unique_ptr<MCObjectFileInfo> MOFI( 433 TheTarget->createMCObjectFileInfo(Ctx, PIC, LargeCodeModel)); 434 Ctx.setObjectFileInfo(MOFI.get()); 435 436 if (SaveTempLabels) 437 Ctx.setAllowTemporaryLabels(false); 438 439 Ctx.setGenDwarfForAssembly(GenDwarfForAssembly); 440 // Default to 4 for dwarf version. 441 unsigned DwarfVersion = MCOptions.DwarfVersion ? MCOptions.DwarfVersion : 4; 442 if (DwarfVersion < 2 || DwarfVersion > 5) { 443 errs() << ProgName << ": Dwarf version " << DwarfVersion 444 << " is not supported." << '\n'; 445 return 1; 446 } 447 Ctx.setDwarfVersion(DwarfVersion); 448 if (MCOptions.Dwarf64) { 449 // The 64-bit DWARF format was introduced in DWARFv3. 450 if (DwarfVersion < 3) { 451 errs() << ProgName 452 << ": the 64-bit DWARF format is not supported for DWARF versions " 453 "prior to 3\n"; 454 return 1; 455 } 456 // 32-bit targets don't support DWARF64, which requires 64-bit relocations. 457 if (MAI->getCodePointerSize() < 8) { 458 errs() << ProgName 459 << ": the 64-bit DWARF format is only supported for 64-bit " 460 "targets\n"; 461 return 1; 462 } 463 // If needsDwarfSectionOffsetDirective is true, we would eventually call 464 // MCStreamer::emitSymbolValue() with IsSectionRelative = true, but that 465 // is supported only for 4-byte long references. 466 if (MAI->needsDwarfSectionOffsetDirective()) { 467 errs() << ProgName << ": the 64-bit DWARF format is not supported for " 468 << TheTriple.normalize() << "\n"; 469 return 1; 470 } 471 Ctx.setDwarfFormat(dwarf::DWARF64); 472 } 473 if (!DwarfDebugFlags.empty()) 474 Ctx.setDwarfDebugFlags(StringRef(DwarfDebugFlags)); 475 if (!DwarfDebugProducer.empty()) 476 Ctx.setDwarfDebugProducer(StringRef(DwarfDebugProducer)); 477 if (!DebugCompilationDir.empty()) 478 Ctx.setCompilationDir(DebugCompilationDir); 479 else { 480 // If no compilation dir is set, try to use the current directory. 481 SmallString<128> CWD; 482 if (!sys::fs::current_path(CWD)) 483 Ctx.setCompilationDir(CWD); 484 } 485 for (const auto &Arg : DebugPrefixMap) { 486 const auto &KV = StringRef(Arg).split('='); 487 Ctx.addDebugPrefixMapEntry(std::string(KV.first), std::string(KV.second)); 488 } 489 if (!MainFileName.empty()) 490 Ctx.setMainFileName(MainFileName); 491 if (GenDwarfForAssembly) 492 Ctx.setGenDwarfRootFile(InputFilename, Buffer->getBuffer()); 493 494 sys::fs::OpenFlags Flags = (FileType == OFT_AssemblyFile) 495 ? sys::fs::OF_TextWithCRLF 496 : sys::fs::OF_None; 497 std::unique_ptr<ToolOutputFile> Out = GetOutputStream(OutputFilename, Flags); 498 if (!Out) 499 return 1; 500 501 std::unique_ptr<ToolOutputFile> DwoOut; 502 if (!SplitDwarfFile.empty()) { 503 if (FileType != OFT_ObjectFile) { 504 WithColor::error() << "dwo output only supported with object files\n"; 505 return 1; 506 } 507 DwoOut = GetOutputStream(SplitDwarfFile, sys::fs::OF_None); 508 if (!DwoOut) 509 return 1; 510 } 511 512 std::unique_ptr<buffer_ostream> BOS; 513 raw_pwrite_stream *OS = &Out->os(); 514 std::unique_ptr<MCStreamer> Str; 515 516 std::unique_ptr<MCInstrInfo> MCII(TheTarget->createMCInstrInfo()); 517 assert(MCII && "Unable to create instruction info!"); 518 519 MCInstPrinter *IP = nullptr; 520 if (FileType == OFT_AssemblyFile) { 521 IP = TheTarget->createMCInstPrinter(Triple(TripleName), OutputAsmVariant, 522 *MAI, *MCII, *MRI); 523 524 if (!IP) { 525 WithColor::error() 526 << "unable to create instruction printer for target triple '" 527 << TheTriple.normalize() << "' with assembly variant " 528 << OutputAsmVariant << ".\n"; 529 return 1; 530 } 531 532 for (StringRef Opt : DisassemblerOptions) 533 if (!IP->applyTargetSpecificCLOption(Opt)) { 534 WithColor::error() << "invalid disassembler option '" << Opt << "'\n"; 535 return 1; 536 } 537 538 // Set the display preference for hex vs. decimal immediates. 539 IP->setPrintImmHex(PrintImmHex); 540 541 // Set up the AsmStreamer. 542 std::unique_ptr<MCCodeEmitter> CE; 543 if (ShowEncoding) 544 CE.reset(TheTarget->createMCCodeEmitter(*MCII, *MRI, Ctx)); 545 546 std::unique_ptr<MCAsmBackend> MAB( 547 TheTarget->createMCAsmBackend(*STI, *MRI, MCOptions)); 548 auto FOut = std::make_unique<formatted_raw_ostream>(*OS); 549 Str.reset( 550 TheTarget->createAsmStreamer(Ctx, std::move(FOut), /*asmverbose*/ true, 551 /*useDwarfDirectory*/ true, IP, 552 std::move(CE), std::move(MAB), ShowInst)); 553 554 } else if (FileType == OFT_Null) { 555 Str.reset(TheTarget->createNullStreamer(Ctx)); 556 } else { 557 assert(FileType == OFT_ObjectFile && "Invalid file type!"); 558 559 if (!Out->os().supportsSeeking()) { 560 BOS = std::make_unique<buffer_ostream>(Out->os()); 561 OS = BOS.get(); 562 } 563 564 MCCodeEmitter *CE = TheTarget->createMCCodeEmitter(*MCII, *MRI, Ctx); 565 MCAsmBackend *MAB = TheTarget->createMCAsmBackend(*STI, *MRI, MCOptions); 566 Str.reset(TheTarget->createMCObjectStreamer( 567 TheTriple, Ctx, std::unique_ptr<MCAsmBackend>(MAB), 568 DwoOut ? MAB->createDwoObjectWriter(*OS, DwoOut->os()) 569 : MAB->createObjectWriter(*OS), 570 std::unique_ptr<MCCodeEmitter>(CE), *STI, MCOptions.MCRelaxAll, 571 MCOptions.MCIncrementalLinkerCompatible, 572 /*DWARFMustBeAtTheEnd*/ false)); 573 if (NoExecStack) 574 Str->initSections(true, *STI); 575 } 576 577 // Use Assembler information for parsing. 578 Str->setUseAssemblerInfoForParsing(true); 579 580 int Res = 1; 581 bool disassemble = false; 582 switch (Action) { 583 case AC_AsLex: 584 Res = AsLexInput(SrcMgr, *MAI, Out->os()); 585 break; 586 case AC_Assemble: 587 Res = AssembleInput(ProgName, TheTarget, SrcMgr, Ctx, *Str, *MAI, *STI, 588 *MCII, MCOptions); 589 break; 590 case AC_MDisassemble: 591 assert(IP && "Expected assembly output"); 592 IP->setUseMarkup(true); 593 disassemble = true; 594 break; 595 case AC_Disassemble: 596 disassemble = true; 597 break; 598 } 599 if (disassemble) 600 Res = Disassembler::disassemble(*TheTarget, TripleName, *STI, *Str, *Buffer, 601 SrcMgr, Ctx, Out->os(), MCOptions); 602 603 // Keep output if no errors. 604 if (Res == 0) { 605 Out->keep(); 606 if (DwoOut) 607 DwoOut->keep(); 608 } 609 return Res; 610 } 611