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