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/ADT/ScopeExit.h"
16#include "llvm/DWARFCFIChecker/DWARFCFIFunctionFrameAnalyzer.h"
17#include "llvm/DWARFCFIChecker/DWARFCFIFunctionFrameStreamer.h"
18#include "llvm/MC/MCAsmBackend.h"
19#include "llvm/MC/MCAsmInfo.h"
20#include "llvm/MC/MCCodeEmitter.h"
21#include "llvm/MC/MCContext.h"
22#include "llvm/MC/MCInstPrinter.h"
23#include "llvm/MC/MCInstrInfo.h"
24#include "llvm/MC/MCObjectFileInfo.h"
25#include "llvm/MC/MCObjectWriter.h"
26#include "llvm/MC/MCParser/AsmLexer.h"
27#include "llvm/MC/MCParser/MCTargetAsmParser.h"
28#include "llvm/MC/MCRegisterInfo.h"
29#include "llvm/MC/MCStreamer.h"
30#include "llvm/MC/MCSubtargetInfo.h"
31#include "llvm/MC/MCTargetOptionsCommandFlags.h"
32#include "llvm/MC/TargetRegistry.h"
33#include "llvm/Support/CommandLine.h"
34#include "llvm/Support/Compression.h"
35#include "llvm/Support/FileUtilities.h"
36#include "llvm/Support/FormattedStream.h"
37#include "llvm/Support/InitLLVM.h"
38#include "llvm/Support/MemoryBuffer.h"
39#include "llvm/Support/SourceMgr.h"
40#include "llvm/Support/TargetSelect.h"
41#include "llvm/Support/TimeProfiler.h"
42#include "llvm/Support/ToolOutputFile.h"
43#include "llvm/Support/VirtualFileSystem.h"
44#include "llvm/Support/WithColor.h"
45#include "llvm/TargetParser/Host.h"
46#include <memory>
47
48using namespace llvm;
49
50static mc::RegisterMCTargetOptionsFlags MOF;
51
52static cl::OptionCategory MCCategory("MC Options");
53
54static cl::opt<std::string> InputFilename(cl::Positional,
55 cl::desc("<input file>"),
56 cl::init(Val: "-"), cl::cat(MCCategory));
57
58static cl::list<std::string> InstPrinterOptions("M",
59 cl::desc("InstPrinter options"),
60 cl::cat(MCCategory));
61
62static cl::opt<std::string> OutputFilename("o", cl::desc("Output filename"),
63 cl::value_desc("filename"),
64 cl::init(Val: "-"), cl::cat(MCCategory));
65
66static cl::opt<std::string> SplitDwarfFile("split-dwarf-file",
67 cl::desc("DWO output filename"),
68 cl::value_desc("filename"),
69 cl::cat(MCCategory));
70
71static cl::opt<bool> ShowEncoding("show-encoding",
72 cl::desc("Show instruction encodings"),
73 cl::cat(MCCategory));
74
75static cl::opt<DebugCompressionType> CompressDebugSections(
76 "compress-debug-sections", cl::ValueOptional,
77 cl::init(Val: DebugCompressionType::None),
78 cl::desc("Choose DWARF debug sections compression:"),
79 cl::values(clEnumValN(DebugCompressionType::None, "none", "No compression"),
80 clEnumValN(DebugCompressionType::Zlib, "zlib", "Use zlib"),
81 clEnumValN(DebugCompressionType::Zstd, "zstd", "Use zstd")),
82 cl::cat(MCCategory));
83
84static cl::opt<bool>
85 ShowInst("show-inst", cl::desc("Show internal instruction representation"),
86 cl::cat(MCCategory));
87
88static cl::opt<bool>
89 ShowInstOperands("show-inst-operands",
90 cl::desc("Show instructions operands as parsed"),
91 cl::cat(MCCategory));
92
93static cl::opt<unsigned>
94 OutputAsmVariant("output-asm-variant",
95 cl::desc("Syntax variant to use for output printing"),
96 cl::cat(MCCategory));
97
98static cl::opt<bool>
99 PrintImmHex("print-imm-hex", cl::init(Val: false),
100 cl::desc("Prefer hex format for immediate values"),
101 cl::cat(MCCategory));
102
103static cl::opt<bool>
104 HexBytes("hex",
105 cl::desc("Take raw hexadecimal bytes as input for disassembly. "
106 "Whitespace is ignored"),
107 cl::cat(MCCategory));
108
109static cl::list<std::string>
110 DefineSymbol("defsym",
111 cl::desc("Defines a symbol to be an integer constant"),
112 cl::cat(MCCategory));
113
114static cl::opt<bool>
115 PreserveComments("preserve-comments",
116 cl::desc("Preserve Comments in outputted assembly"),
117 cl::cat(MCCategory));
118
119static cl::opt<unsigned> CommentColumn("comment-column",
120 cl::desc("Asm comments indentation"),
121 cl::init(Val: 40));
122
123enum OutputFileType {
124 OFT_Null,
125 OFT_AssemblyFile,
126 OFT_ObjectFile
127};
128static cl::opt<OutputFileType>
129 FileType("filetype", cl::init(Val: OFT_AssemblyFile),
130 cl::desc("Choose an output file type:"),
131 cl::values(clEnumValN(OFT_AssemblyFile, "asm",
132 "Emit an assembly ('.s') file"),
133 clEnumValN(OFT_Null, "null",
134 "Don't emit anything (for timing purposes)"),
135 clEnumValN(OFT_ObjectFile, "obj",
136 "Emit a native object ('.o') file")),
137 cl::cat(MCCategory));
138
139static cl::list<std::string> IncludeDirs("I",
140 cl::desc("Directory of include files"),
141 cl::value_desc("directory"),
142 cl::Prefix, cl::cat(MCCategory));
143
144static cl::opt<std::string>
145 ArchName("arch",
146 cl::desc("Target arch to assemble for, "
147 "see -version for available targets"),
148 cl::cat(MCCategory));
149
150static cl::opt<std::string>
151 TripleName("triple",
152 cl::desc("Target triple to assemble for, "
153 "see -version for available targets"),
154 cl::cat(MCCategory));
155
156static cl::opt<std::string>
157 MCPU("mcpu",
158 cl::desc("Target a specific cpu type (-mcpu=help for details)"),
159 cl::value_desc("cpu-name"), cl::init(Val: ""), cl::cat(MCCategory));
160
161static cl::list<std::string>
162 MAttrs("mattr", cl::CommaSeparated,
163 cl::desc("Target specific attributes (-mattr=help for details)"),
164 cl::value_desc("a1,+a2,-a3,..."), cl::cat(MCCategory));
165
166static cl::opt<bool> PIC("position-independent",
167 cl::desc("Position independent"), cl::init(Val: false),
168 cl::cat(MCCategory));
169
170static cl::opt<bool>
171 LargeCodeModel("large-code-model",
172 cl::desc("Create cfi directives that assume the code might "
173 "be more than 2gb away"),
174 cl::cat(MCCategory));
175
176static cl::opt<bool>
177 NoInitialTextSection("n",
178 cl::desc("Don't assume assembly file starts "
179 "in the text section"),
180 cl::cat(MCCategory));
181
182static cl::opt<bool>
183 GenDwarfForAssembly("g",
184 cl::desc("Generate dwarf debugging info for assembly "
185 "source files"),
186 cl::cat(MCCategory));
187
188static cl::opt<std::string>
189 DebugCompilationDir("fdebug-compilation-dir",
190 cl::desc("Specifies the debug info's compilation dir"),
191 cl::cat(MCCategory));
192
193static cl::list<std::string> DebugPrefixMap(
194 "fdebug-prefix-map", cl::desc("Map file source paths in debug info"),
195 cl::value_desc("= separated key-value pairs"), cl::cat(MCCategory));
196
197static cl::opt<std::string> MainFileName(
198 "main-file-name",
199 cl::desc("Specifies the name we should consider the input file"),
200 cl::cat(MCCategory));
201
202static cl::opt<bool> LexMasmIntegers(
203 "masm-integers",
204 cl::desc("Enable binary and hex masm integers (0b110 and 0ABCh)"),
205 cl::cat(MCCategory));
206
207static cl::opt<bool> LexMasmHexFloats(
208 "masm-hexfloats",
209 cl::desc("Enable MASM-style hex float initializers (3F800000r)"),
210 cl::cat(MCCategory));
211
212static cl::opt<bool> LexMotorolaIntegers(
213 "motorola-integers",
214 cl::desc("Enable binary and hex Motorola integers (%110 and $ABC)"),
215 cl::cat(MCCategory));
216
217static cl::opt<bool> NoExecStack("no-exec-stack",
218 cl::desc("File doesn't need an exec stack"),
219 cl::cat(MCCategory));
220
221static cl::opt<bool> ValidateCFI("validate-cfi",
222 cl::desc("Validate the CFI directives"),
223 cl::cat(MCCategory));
224
225enum ActionType {
226 AC_AsLex,
227 AC_Assemble,
228 AC_Disassemble,
229 AC_MDisassemble,
230 AC_CDisassemble,
231};
232
233static cl::opt<ActionType> Action(
234 cl::desc("Action to perform:"), cl::init(Val: AC_Assemble),
235 cl::values(clEnumValN(AC_AsLex, "as-lex", "Lex tokens from a .s file"),
236 clEnumValN(AC_Assemble, "assemble",
237 "Assemble a .s file (default)"),
238 clEnumValN(AC_Disassemble, "disassemble",
239 "Disassemble strings of hex bytes"),
240 clEnumValN(AC_MDisassemble, "mdis",
241 "Marked up disassembly of strings of hex bytes"),
242 clEnumValN(AC_CDisassemble, "cdis",
243 "Colored disassembly of strings of hex bytes")),
244 cl::cat(MCCategory));
245
246static cl::opt<unsigned>
247 NumBenchmarkRuns("runs", cl::desc("Number of runs for benchmarking"),
248 cl::cat(MCCategory));
249
250static cl::opt<bool> TimeTrace("time-trace", cl::desc("Record time trace"));
251
252static cl::opt<unsigned> TimeTraceGranularity(
253 "time-trace-granularity",
254 cl::desc(
255 "Minimum time granularity (in microseconds) traced by time profiler"),
256 cl::init(Val: 500), cl::Hidden);
257
258static cl::opt<std::string>
259 TimeTraceFile("time-trace-file",
260 cl::desc("Specify time trace file destination"),
261 cl::value_desc("filename"));
262
263static const Target *GetTarget(const char *ProgName) {
264 // Figure out the target triple.
265 if (TripleName.empty())
266 TripleName = sys::getDefaultTargetTriple();
267 Triple TheTriple(Triple::normalize(Str: TripleName));
268
269 // Get the target specific parser.
270 std::string Error;
271 const Target *TheTarget = TargetRegistry::lookupTarget(ArchName, TheTriple,
272 Error);
273 if (!TheTarget) {
274 WithColor::error(OS&: errs(), Prefix: ProgName) << Error;
275 return nullptr;
276 }
277
278 // Update the triple name and return the found target.
279 TripleName = TheTriple.getTriple();
280 return TheTarget;
281}
282
283static std::unique_ptr<ToolOutputFile> GetOutputStream(StringRef Path,
284 sys::fs::OpenFlags Flags) {
285 std::error_code EC;
286 auto Out = std::make_unique<ToolOutputFile>(args&: Path, args&: EC, args&: Flags);
287 if (EC) {
288 WithColor::error() << EC.message() << '\n';
289 return nullptr;
290 }
291
292 return Out;
293}
294
295static std::string DwarfDebugFlags;
296static void setDwarfDebugFlags(int argc, char **argv) {
297 if (!getenv(name: "RC_DEBUG_OPTIONS"))
298 return;
299 for (int i = 0; i < argc; i++) {
300 DwarfDebugFlags += argv[i];
301 if (i + 1 < argc)
302 DwarfDebugFlags += " ";
303 }
304}
305
306static std::string DwarfDebugProducer;
307static void setDwarfDebugProducer() {
308 if(!getenv(name: "DEBUG_PRODUCER"))
309 return;
310 DwarfDebugProducer += getenv(name: "DEBUG_PRODUCER");
311}
312
313static int AsLexInput(SourceMgr &SrcMgr, MCAsmInfo &MAI,
314 raw_ostream &OS) {
315
316 AsmLexer Lexer(MAI);
317 Lexer.setBuffer(Buf: SrcMgr.getMemoryBuffer(i: SrcMgr.getMainFileID())->getBuffer());
318
319 bool Error = false;
320 while (Lexer.Lex().isNot(K: AsmToken::Eof)) {
321 Lexer.getTok().dump(OS);
322 OS << "\n";
323 if (Lexer.getTok().getKind() == AsmToken::Error)
324 Error = true;
325 }
326
327 return Error;
328}
329
330static int fillCommandLineSymbols(MCAsmParser &Parser) {
331 for (auto &I: DefineSymbol) {
332 auto Pair = StringRef(I).split(Separator: '=');
333 auto Sym = Pair.first;
334 auto Val = Pair.second;
335
336 if (Sym.empty() || Val.empty()) {
337 WithColor::error() << "defsym must be of the form: sym=value: " << I
338 << "\n";
339 return 1;
340 }
341 int64_t Value;
342 if (Val.getAsInteger(Radix: 0, Result&: Value)) {
343 WithColor::error() << "value is not an integer: " << Val << "\n";
344 return 1;
345 }
346 Parser.getContext().setSymbolValue(Streamer&: Parser.getStreamer(), Sym, Val: Value);
347 }
348 return 0;
349}
350
351static int AssembleInput(const char *ProgName, const Target *TheTarget,
352 SourceMgr &SrcMgr, MCContext &Ctx, MCStreamer &Str,
353 MCAsmInfo &MAI, MCSubtargetInfo &STI,
354 MCInstrInfo &MCII, MCTargetOptions const &MCOptions) {
355 std::unique_ptr<MCAsmParser> Parser(
356 createMCAsmParser(SrcMgr, Ctx, Str, MAI));
357 std::unique_ptr<MCTargetAsmParser> TAP(
358 TheTarget->createMCAsmParser(STI, Parser&: *Parser, MII: MCII, Options: MCOptions));
359
360 if (!TAP) {
361 WithColor::error(OS&: errs(), Prefix: ProgName)
362 << "this target does not support assembly parsing.\n";
363 return 1;
364 }
365
366 int SymbolResult = fillCommandLineSymbols(Parser&: *Parser);
367 if(SymbolResult)
368 return SymbolResult;
369 Parser->setShowParsedOperands(ShowInstOperands);
370 Parser->setTargetParser(*TAP);
371 Parser->getLexer().setLexMasmIntegers(LexMasmIntegers);
372 Parser->getLexer().setLexMasmHexFloats(LexMasmHexFloats);
373 Parser->getLexer().setLexMotorolaIntegers(LexMotorolaIntegers);
374
375 int Res = Parser->Run(NoInitialTextSection);
376
377 return Res;
378}
379
380int main(int argc, char **argv) {
381 InitLLVM X(argc, argv);
382
383 // Initialize targets and assembly printers/parsers.
384 llvm::InitializeAllTargetInfos();
385 llvm::InitializeAllTargetMCs();
386 llvm::InitializeAllAsmParsers();
387 llvm::InitializeAllDisassemblers();
388
389 // Register the target printer for --version.
390 cl::AddExtraVersionPrinter(func: TargetRegistry::printRegisteredTargetsForVersion);
391
392 cl::HideUnrelatedOptions(Categories: {&MCCategory, &getColorCategory()});
393 cl::ParseCommandLineOptions(argc, argv, Overview: "llvm machine code playground\n");
394
395 if (TimeTrace)
396 timeTraceProfilerInitialize(TimeTraceGranularity, ProcName: argv[0]);
397
398 llvm::scope_exit TimeTraceScopeExit([]() {
399 if (!TimeTrace)
400 return;
401 if (auto E = timeTraceProfilerWrite(PreferredFileName: TimeTraceFile, FallbackFileName: OutputFilename)) {
402 logAllUnhandledErrors(E: std::move(E), OS&: errs());
403 return;
404 }
405 timeTraceProfilerCleanup();
406 });
407
408 MCTargetOptions MCOptions = mc::InitMCTargetOptionsFromFlags();
409 MCOptions.CompressDebugSections = CompressDebugSections.getValue();
410 MCOptions.ShowMCInst = ShowInst;
411 MCOptions.AsmVerbose = true;
412 MCOptions.MCUseDwarfDirectory = MCTargetOptions::EnableDwarfDirectory;
413 MCOptions.InstPrinterOptions = InstPrinterOptions;
414
415 setDwarfDebugFlags(argc, argv);
416 setDwarfDebugProducer();
417
418 const char *ProgName = argv[0];
419 const Target *TheTarget = GetTarget(ProgName);
420 if (!TheTarget)
421 return 1;
422 // Now that GetTarget() has (potentially) replaced TripleName, it's safe to
423 // construct the Triple object.
424 Triple TheTriple(TripleName);
425
426 ErrorOr<std::unique_ptr<MemoryBuffer>> BufferPtr =
427 MemoryBuffer::getFileOrSTDIN(Filename: InputFilename, /*IsText=*/true);
428 if (std::error_code EC = BufferPtr.getError()) {
429 WithColor::error(OS&: errs(), Prefix: ProgName)
430 << InputFilename << ": " << EC.message() << '\n';
431 return 1;
432 }
433 MemoryBuffer *Buffer = BufferPtr->get();
434
435 SourceMgr SrcMgr;
436
437 // Tell SrcMgr about this buffer, which is what the parser will pick up.
438 SrcMgr.AddNewSourceBuffer(F: std::move(*BufferPtr), IncludeLoc: SMLoc());
439
440 // Record the location of the include directories so that the lexer can find
441 // it later.
442 SrcMgr.setIncludeDirs(IncludeDirs);
443 SrcMgr.setVirtualFileSystem(vfs::getRealFileSystem());
444
445 std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TT: TheTriple));
446 assert(MRI && "Unable to create target register info!");
447
448 std::unique_ptr<MCAsmInfo> MAI(
449 TheTarget->createMCAsmInfo(MRI: *MRI, TheTriple, Options: MCOptions));
450 assert(MAI && "Unable to create target asm info!");
451
452 if (CompressDebugSections != DebugCompressionType::None) {
453 if (const char *Reason = compression::getReasonIfUnsupported(
454 F: compression::formatFor(Type: CompressDebugSections))) {
455 WithColor::error(OS&: errs(), Prefix: ProgName)
456 << "--compress-debug-sections: " << Reason;
457 return 1;
458 }
459 }
460 MAI->setPreserveAsmComments(PreserveComments);
461 MAI->setCommentColumn(CommentColumn);
462
463 // Package up features to be passed to target/subtarget
464 SubtargetFeatures Features;
465 std::string FeaturesStr;
466
467 // Replace -mcpu=native with Host CPU and features.
468 if (MCPU == "native") {
469 MCPU = std::string(llvm::sys::getHostCPUName());
470
471 llvm::StringMap<bool> TargetFeatures = llvm::sys::getHostCPUFeatures();
472 for (auto const &[FeatureName, IsSupported] : TargetFeatures)
473 Features.AddFeature(String: FeatureName, Enable: IsSupported);
474 }
475
476 // Handle features passed to target/subtarget.
477 for (unsigned i = 0; i != MAttrs.size(); ++i)
478 Features.AddFeature(String: MAttrs[i]);
479 FeaturesStr = Features.getString();
480
481 std::unique_ptr<MCSubtargetInfo> STI(
482 TheTarget->createMCSubtargetInfo(TheTriple, CPU: MCPU, Features: FeaturesStr));
483 if (!STI) {
484 WithColor::error(OS&: errs(), Prefix: ProgName) << "unable to create subtarget info\n";
485 return 1;
486 }
487
488 // FIXME: This is not pretty. MCContext has a ptr to MCObjectFileInfo and
489 // MCObjectFileInfo needs a MCContext reference in order to initialize itself.
490 MCContext Ctx(TheTriple, MAI.get(), MRI.get(), STI.get(), &SrcMgr,
491 &MCOptions);
492 std::unique_ptr<MCObjectFileInfo> MOFI(
493 TheTarget->createMCObjectFileInfo(Ctx, PIC, LargeCodeModel));
494 Ctx.setObjectFileInfo(MOFI.get());
495
496 Ctx.setGenDwarfForAssembly(GenDwarfForAssembly);
497 // Default to 4 for dwarf version.
498 unsigned DwarfVersion = MCOptions.DwarfVersion ? MCOptions.DwarfVersion : 4;
499 if (DwarfVersion < 2 || DwarfVersion > 5) {
500 errs() << ProgName << ": Dwarf version " << DwarfVersion
501 << " is not supported." << '\n';
502 return 1;
503 }
504 Ctx.setDwarfVersion(DwarfVersion);
505 if (MCOptions.Dwarf64) {
506 // The 64-bit DWARF format was introduced in DWARFv3.
507 if (DwarfVersion < 3) {
508 errs() << ProgName
509 << ": the 64-bit DWARF format is not supported for DWARF versions "
510 "prior to 3\n";
511 return 1;
512 }
513 // 32-bit targets don't support DWARF64, which requires 64-bit relocations.
514 if (MAI->getCodePointerSize() < 8) {
515 errs() << ProgName
516 << ": the 64-bit DWARF format is only supported for 64-bit "
517 "targets\n";
518 return 1;
519 }
520 // If needsDwarfSectionOffsetDirective is true, we would eventually call
521 // MCStreamer::emitSymbolValue() with IsSectionRelative = true, but that
522 // is supported only for 4-byte long references.
523 if (MAI->needsDwarfSectionOffsetDirective()) {
524 errs() << ProgName << ": the 64-bit DWARF format is not supported for "
525 << TheTriple.normalize() << "\n";
526 return 1;
527 }
528 Ctx.setDwarfFormat(dwarf::DWARF64);
529 }
530 if (!DwarfDebugFlags.empty())
531 Ctx.setDwarfDebugFlags(StringRef(DwarfDebugFlags));
532 if (!DwarfDebugProducer.empty())
533 Ctx.setDwarfDebugProducer(StringRef(DwarfDebugProducer));
534 if (!DebugCompilationDir.empty())
535 Ctx.setCompilationDir(DebugCompilationDir);
536 else {
537 // If no compilation dir is set, try to use the current directory.
538 SmallString<128> CWD;
539 if (!sys::fs::current_path(result&: CWD))
540 Ctx.setCompilationDir(CWD);
541 }
542 for (const auto &Arg : DebugPrefixMap) {
543 const auto &KV = StringRef(Arg).split(Separator: '=');
544 Ctx.addDebugPrefixMapEntry(From: std::string(KV.first), To: std::string(KV.second));
545 }
546 if (!MainFileName.empty())
547 Ctx.setMainFileName(MainFileName);
548 if (GenDwarfForAssembly)
549 Ctx.setGenDwarfRootFile(FileName: InputFilename, Buffer: Buffer->getBuffer());
550
551 sys::fs::OpenFlags Flags = (FileType == OFT_AssemblyFile)
552 ? sys::fs::OF_TextWithCRLF
553 : sys::fs::OF_None;
554 std::unique_ptr<ToolOutputFile> Out = GetOutputStream(Path: OutputFilename, Flags);
555 if (!Out)
556 return 1;
557
558 std::unique_ptr<ToolOutputFile> DwoOut;
559 if (!SplitDwarfFile.empty()) {
560 if (FileType != OFT_ObjectFile) {
561 WithColor::error() << "dwo output only supported with object files\n";
562 return 1;
563 }
564 DwoOut = GetOutputStream(Path: SplitDwarfFile, Flags: sys::fs::OF_None);
565 if (!DwoOut)
566 return 1;
567 }
568
569 std::unique_ptr<buffer_ostream> BOS;
570 raw_pwrite_stream *OS = &Out->os();
571 std::unique_ptr<MCStreamer> Str;
572
573 std::unique_ptr<MCInstrInfo> MCII(TheTarget->createMCInstrInfo());
574 assert(MCII && "Unable to create instruction info!");
575
576 std::unique_ptr<MCInstPrinter> IP;
577 if (ValidateCFI) {
578 // TODO: The DWARF CFI checker support for emitting anything other than
579 // errors and warnings has not been implemented yet. Because of this, it is
580 // assert-checked that the filetype output is null.
581 assert(FileType == OFT_Null);
582 auto FFA = std::make_unique<CFIFunctionFrameAnalyzer>(args&: Ctx, args&: *MCII);
583 auto FFS = std::make_unique<CFIFunctionFrameStreamer>(args&: Ctx, args: std::move(FFA));
584 TheTarget->createNullTargetStreamer(S&: *FFS);
585 Str = std::move(FFS);
586 } else if (FileType == OFT_AssemblyFile) {
587 IP.reset(p: TheTarget->createMCInstPrinter(
588 T: Triple(TripleName), SyntaxVariant: OutputAsmVariant, MAI: *MAI, MII: *MCII, MRI: *MRI));
589
590 if (!IP) {
591 WithColor::error()
592 << "unable to create instruction printer for target triple '"
593 << TheTriple.normalize() << "' with assembly variant "
594 << OutputAsmVariant << ".\n";
595 return 1;
596 }
597
598 for (StringRef Opt : InstPrinterOptions)
599 if (!IP->applyTargetSpecificCLOption(Opt)) {
600 WithColor::error() << "invalid InstPrinter option '" << Opt << "'\n";
601 return 1;
602 }
603
604 // Set the display preference for hex vs. decimal immediates.
605 IP->setPrintImmHex(PrintImmHex);
606
607 switch (Action) {
608 case AC_MDisassemble:
609 IP->setUseMarkup(true);
610 break;
611 case AC_CDisassemble:
612 IP->setUseColor(true);
613 break;
614 default:
615 break;
616 }
617
618 // Set up the AsmStreamer.
619 std::unique_ptr<MCCodeEmitter> CE;
620 if (ShowEncoding)
621 CE.reset(p: TheTarget->createMCCodeEmitter(II: *MCII, Ctx));
622
623 std::unique_ptr<MCAsmBackend> MAB(
624 TheTarget->createMCAsmBackend(STI: *STI, MRI: *MRI, Options: MCOptions));
625 auto FOut = std::make_unique<formatted_raw_ostream>(args&: *OS);
626 Str.reset(p: TheTarget->createAsmStreamer(Ctx, OS: std::move(FOut), IP: std::move(IP),
627 CE: std::move(CE), TAB: std::move(MAB)));
628
629 } else if (FileType == OFT_Null) {
630 Str.reset(p: TheTarget->createNullStreamer(Ctx));
631 } else {
632 assert(FileType == OFT_ObjectFile && "Invalid file type!");
633
634 if (!Out->os().supportsSeeking()) {
635 BOS = std::make_unique<buffer_ostream>(args&: Out->os());
636 OS = BOS.get();
637 }
638
639 MCCodeEmitter *CE = TheTarget->createMCCodeEmitter(II: *MCII, Ctx);
640 MCAsmBackend *MAB = TheTarget->createMCAsmBackend(STI: *STI, MRI: *MRI, Options: MCOptions);
641 Str.reset(p: TheTarget->createMCObjectStreamer(
642 T: TheTriple, Ctx, TAB: std::unique_ptr<MCAsmBackend>(MAB),
643 OW: DwoOut ? MAB->createDwoObjectWriter(OS&: *OS, DwoOS&: DwoOut->os())
644 : MAB->createObjectWriter(OS&: *OS),
645 Emitter: std::unique_ptr<MCCodeEmitter>(CE), STI: *STI));
646 if (NoExecStack)
647 Str->switchSection(
648 Section: Ctx.getAsmInfo()->getStackSection(Ctx, /*Exec=*/false));
649 Str->emitVersionForTarget(Target: TheTriple, SDKVersion: VersionTuple(), DarwinTargetVariantTriple: nullptr,
650 DarwinTargetVariantSDKVersion: VersionTuple());
651 }
652
653 int Res = 1;
654 bool disassemble = false;
655 switch (Action) {
656 case AC_AsLex:
657 Res = AsLexInput(SrcMgr, MAI&: *MAI, OS&: Out->os());
658 break;
659 case AC_Assemble:
660 Res = AssembleInput(ProgName, TheTarget, SrcMgr, Ctx, Str&: *Str, MAI&: *MAI, STI&: *STI,
661 MCII&: *MCII, MCOptions);
662 break;
663 case AC_MDisassemble:
664 case AC_CDisassemble:
665 case AC_Disassemble:
666 disassemble = true;
667 break;
668 }
669 if (disassemble)
670 Res = Disassembler::disassemble(T: *TheTarget, STI&: *STI, Streamer&: *Str, Buffer&: *Buffer, SM&: SrcMgr,
671 Ctx, MCOptions, HexBytes, NumBenchmarkRuns);
672
673 // Keep output if no errors.
674 if (Res == 0) {
675 Out->keep();
676 if (DwoOut)
677 DwoOut->keep();
678 }
679
680 return Res;
681}
682