LLVM  10.0.0svn
DarwinAsmParser.cpp
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1 //===- DarwinAsmParser.cpp - Darwin (Mach-O) Assembly Parser --------------===//
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 #include "llvm/ADT/STLExtras.h"
10 #include "llvm/ADT/SmallVector.h"
11 #include "llvm/ADT/StringRef.h"
12 #include "llvm/ADT/StringSwitch.h"
13 #include "llvm/ADT/Triple.h"
14 #include "llvm/ADT/Twine.h"
16 #include "llvm/MC/MCContext.h"
17 #include "llvm/MC/MCDirectives.h"
22 #include "llvm/MC/MCSectionMachO.h"
23 #include "llvm/MC/MCStreamer.h"
24 #include "llvm/MC/MCSymbol.h"
25 #include "llvm/MC/SectionKind.h"
28 #include "llvm/Support/SMLoc.h"
29 #include "llvm/Support/SourceMgr.h"
31 #include <algorithm>
32 #include <cstddef>
33 #include <cstdint>
34 #include <string>
35 #include <system_error>
36 #include <utility>
37 
38 using namespace llvm;
39 
40 namespace {
41 
42 /// Implementation of directive handling which is shared across all
43 /// Darwin targets.
44 class DarwinAsmParser : public MCAsmParserExtension {
45  template<bool (DarwinAsmParser::*HandlerMethod)(StringRef, SMLoc)>
46  void addDirectiveHandler(StringRef Directive) {
47  MCAsmParser::ExtensionDirectiveHandler Handler = std::make_pair(
48  this, HandleDirective<DarwinAsmParser, HandlerMethod>);
49  getParser().addDirectiveHandler(Directive, Handler);
50  }
51 
52  bool parseSectionSwitch(StringRef Segment, StringRef Section,
53  unsigned TAA = 0, unsigned ImplicitAlign = 0,
54  unsigned StubSize = 0);
55 
56  SMLoc LastVersionDirective;
57 
58 public:
59  DarwinAsmParser() = default;
60 
61  void Initialize(MCAsmParser &Parser) override {
62  // Call the base implementation.
64 
65  addDirectiveHandler<&DarwinAsmParser::parseDirectiveAltEntry>(".alt_entry");
66  addDirectiveHandler<&DarwinAsmParser::parseDirectiveDesc>(".desc");
67  addDirectiveHandler<&DarwinAsmParser::parseDirectiveIndirectSymbol>(
68  ".indirect_symbol");
69  addDirectiveHandler<&DarwinAsmParser::parseDirectiveLsym>(".lsym");
70  addDirectiveHandler<&DarwinAsmParser::parseDirectiveSubsectionsViaSymbols>(
71  ".subsections_via_symbols");
72  addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".dump");
73  addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".load");
74  addDirectiveHandler<&DarwinAsmParser::parseDirectiveSection>(".section");
75  addDirectiveHandler<&DarwinAsmParser::parseDirectivePushSection>(
76  ".pushsection");
77  addDirectiveHandler<&DarwinAsmParser::parseDirectivePopSection>(
78  ".popsection");
79  addDirectiveHandler<&DarwinAsmParser::parseDirectivePrevious>(".previous");
80  addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogUnique>(
81  ".secure_log_unique");
82  addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogReset>(
83  ".secure_log_reset");
84  addDirectiveHandler<&DarwinAsmParser::parseDirectiveTBSS>(".tbss");
85  addDirectiveHandler<&DarwinAsmParser::parseDirectiveZerofill>(".zerofill");
86 
87  addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegion>(
88  ".data_region");
89  addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegionEnd>(
90  ".end_data_region");
91 
92  // Special section directives.
93  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveBss>(".bss");
94  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConst>(".const");
95  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstData>(
96  ".const_data");
97  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstructor>(
98  ".constructor");
99  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveCString>(
100  ".cstring");
101  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveData>(".data");
102  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDestructor>(
103  ".destructor");
104  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDyld>(".dyld");
105  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit0>(
106  ".fvmlib_init0");
107  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit1>(
108  ".fvmlib_init1");
109  addDirectiveHandler<
110  &DarwinAsmParser::parseSectionDirectiveLazySymbolPointers>(
111  ".lazy_symbol_pointer");
112  addDirectiveHandler<&DarwinAsmParser::parseDirectiveLinkerOption>(
113  ".linker_option");
114  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral16>(
115  ".literal16");
116  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral4>(
117  ".literal4");
118  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral8>(
119  ".literal8");
120  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModInitFunc>(
121  ".mod_init_func");
122  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModTermFunc>(
123  ".mod_term_func");
124  addDirectiveHandler<
125  &DarwinAsmParser::parseSectionDirectiveNonLazySymbolPointers>(
126  ".non_lazy_symbol_pointer");
127  addDirectiveHandler<
128  &DarwinAsmParser::parseSectionDirectiveThreadLocalVariablePointers>(
129  ".thread_local_variable_pointer");
130  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatClsMeth>(
131  ".objc_cat_cls_meth");
132  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatInstMeth>(
133  ".objc_cat_inst_meth");
134  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCategory>(
135  ".objc_category");
136  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClass>(
137  ".objc_class");
138  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassNames>(
139  ".objc_class_names");
140  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassVars>(
141  ".objc_class_vars");
142  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsMeth>(
143  ".objc_cls_meth");
144  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsRefs>(
145  ".objc_cls_refs");
146  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCInstMeth>(
147  ".objc_inst_meth");
148  addDirectiveHandler<
149  &DarwinAsmParser::parseSectionDirectiveObjCInstanceVars>(
150  ".objc_instance_vars");
151  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMessageRefs>(
152  ".objc_message_refs");
153  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMetaClass>(
154  ".objc_meta_class");
155  addDirectiveHandler<
156  &DarwinAsmParser::parseSectionDirectiveObjCMethVarNames>(
157  ".objc_meth_var_names");
158  addDirectiveHandler<
159  &DarwinAsmParser::parseSectionDirectiveObjCMethVarTypes>(
160  ".objc_meth_var_types");
161  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCModuleInfo>(
162  ".objc_module_info");
163  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCProtocol>(
164  ".objc_protocol");
165  addDirectiveHandler<
166  &DarwinAsmParser::parseSectionDirectiveObjCSelectorStrs>(
167  ".objc_selector_strs");
168  addDirectiveHandler<
169  &DarwinAsmParser::parseSectionDirectiveObjCStringObject>(
170  ".objc_string_object");
171  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCSymbols>(
172  ".objc_symbols");
173  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectivePICSymbolStub>(
174  ".picsymbol_stub");
175  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticConst>(
176  ".static_const");
177  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticData>(
178  ".static_data");
179  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveSymbolStub>(
180  ".symbol_stub");
181  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTData>(".tdata");
182  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveText>(".text");
183  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveThreadInitFunc>(
184  ".thread_init_func");
185  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTLV>(".tlv");
186 
187  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveIdent>(".ident");
188  addDirectiveHandler<&DarwinAsmParser::parseWatchOSVersionMin>(
189  ".watchos_version_min");
190  addDirectiveHandler<&DarwinAsmParser::parseTvOSVersionMin>(
191  ".tvos_version_min");
192  addDirectiveHandler<&DarwinAsmParser::parseIOSVersionMin>(
193  ".ios_version_min");
194  addDirectiveHandler<&DarwinAsmParser::parseMacOSXVersionMin>(
195  ".macosx_version_min");
196  addDirectiveHandler<&DarwinAsmParser::parseBuildVersion>(".build_version");
197 
198  LastVersionDirective = SMLoc();
199  }
200 
201  bool parseDirectiveAltEntry(StringRef, SMLoc);
202  bool parseDirectiveDesc(StringRef, SMLoc);
203  bool parseDirectiveIndirectSymbol(StringRef, SMLoc);
204  bool parseDirectiveDumpOrLoad(StringRef, SMLoc);
205  bool parseDirectiveLsym(StringRef, SMLoc);
206  bool parseDirectiveLinkerOption(StringRef, SMLoc);
207  bool parseDirectiveSection(StringRef, SMLoc);
208  bool parseDirectivePushSection(StringRef, SMLoc);
209  bool parseDirectivePopSection(StringRef, SMLoc);
210  bool parseDirectivePrevious(StringRef, SMLoc);
211  bool parseDirectiveSecureLogReset(StringRef, SMLoc);
212  bool parseDirectiveSecureLogUnique(StringRef, SMLoc);
213  bool parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc);
214  bool parseDirectiveTBSS(StringRef, SMLoc);
215  bool parseDirectiveZerofill(StringRef, SMLoc);
216  bool parseDirectiveDataRegion(StringRef, SMLoc);
217  bool parseDirectiveDataRegionEnd(StringRef, SMLoc);
218 
219  // Named Section Directive
220  bool parseSectionDirectiveBss(StringRef, SMLoc) {
221  return parseSectionSwitch("__DATA", "__bss");
222  }
223 
224  bool parseSectionDirectiveConst(StringRef, SMLoc) {
225  return parseSectionSwitch("__TEXT", "__const");
226  }
227 
228  bool parseSectionDirectiveStaticConst(StringRef, SMLoc) {
229  return parseSectionSwitch("__TEXT", "__static_const");
230  }
231 
232  bool parseSectionDirectiveCString(StringRef, SMLoc) {
233  return parseSectionSwitch("__TEXT","__cstring",
235  }
236 
237  bool parseSectionDirectiveLiteral4(StringRef, SMLoc) {
238  return parseSectionSwitch("__TEXT", "__literal4",
240  }
241 
242  bool parseSectionDirectiveLiteral8(StringRef, SMLoc) {
243  return parseSectionSwitch("__TEXT", "__literal8",
245  }
246 
247  bool parseSectionDirectiveLiteral16(StringRef, SMLoc) {
248  return parseSectionSwitch("__TEXT","__literal16",
250  }
251 
252  bool parseSectionDirectiveConstructor(StringRef, SMLoc) {
253  return parseSectionSwitch("__TEXT","__constructor");
254  }
255 
256  bool parseSectionDirectiveDestructor(StringRef, SMLoc) {
257  return parseSectionSwitch("__TEXT","__destructor");
258  }
259 
260  bool parseSectionDirectiveFVMLibInit0(StringRef, SMLoc) {
261  return parseSectionSwitch("__TEXT","__fvmlib_init0");
262  }
263 
264  bool parseSectionDirectiveFVMLibInit1(StringRef, SMLoc) {
265  return parseSectionSwitch("__TEXT","__fvmlib_init1");
266  }
267 
268  bool parseSectionDirectiveSymbolStub(StringRef, SMLoc) {
269  return parseSectionSwitch("__TEXT","__symbol_stub",
272  // FIXME: Different on PPC and ARM.
273  0, 16);
274  }
275 
276  bool parseSectionDirectivePICSymbolStub(StringRef, SMLoc) {
277  return parseSectionSwitch("__TEXT","__picsymbol_stub",
280  }
281 
282  bool parseSectionDirectiveData(StringRef, SMLoc) {
283  return parseSectionSwitch("__DATA", "__data");
284  }
285 
286  bool parseSectionDirectiveStaticData(StringRef, SMLoc) {
287  return parseSectionSwitch("__DATA", "__static_data");
288  }
289 
290  bool parseSectionDirectiveNonLazySymbolPointers(StringRef, SMLoc) {
291  return parseSectionSwitch("__DATA", "__nl_symbol_ptr",
293  }
294 
295  bool parseSectionDirectiveLazySymbolPointers(StringRef, SMLoc) {
296  return parseSectionSwitch("__DATA", "__la_symbol_ptr",
298  }
299 
300  bool parseSectionDirectiveThreadLocalVariablePointers(StringRef, SMLoc) {
301  return parseSectionSwitch("__DATA", "__thread_ptr",
303  }
304 
305  bool parseSectionDirectiveDyld(StringRef, SMLoc) {
306  return parseSectionSwitch("__DATA", "__dyld");
307  }
308 
309  bool parseSectionDirectiveModInitFunc(StringRef, SMLoc) {
310  return parseSectionSwitch("__DATA", "__mod_init_func",
312  }
313 
314  bool parseSectionDirectiveModTermFunc(StringRef, SMLoc) {
315  return parseSectionSwitch("__DATA", "__mod_term_func",
317  }
318 
319  bool parseSectionDirectiveConstData(StringRef, SMLoc) {
320  return parseSectionSwitch("__DATA", "__const");
321  }
322 
323  bool parseSectionDirectiveObjCClass(StringRef, SMLoc) {
324  return parseSectionSwitch("__OBJC", "__class",
326  }
327 
328  bool parseSectionDirectiveObjCMetaClass(StringRef, SMLoc) {
329  return parseSectionSwitch("__OBJC", "__meta_class",
331  }
332 
333  bool parseSectionDirectiveObjCCatClsMeth(StringRef, SMLoc) {
334  return parseSectionSwitch("__OBJC", "__cat_cls_meth",
336  }
337 
338  bool parseSectionDirectiveObjCCatInstMeth(StringRef, SMLoc) {
339  return parseSectionSwitch("__OBJC", "__cat_inst_meth",
341  }
342 
343  bool parseSectionDirectiveObjCProtocol(StringRef, SMLoc) {
344  return parseSectionSwitch("__OBJC", "__protocol",
346  }
347 
348  bool parseSectionDirectiveObjCStringObject(StringRef, SMLoc) {
349  return parseSectionSwitch("__OBJC", "__string_object",
351  }
352 
353  bool parseSectionDirectiveObjCClsMeth(StringRef, SMLoc) {
354  return parseSectionSwitch("__OBJC", "__cls_meth",
356  }
357 
358  bool parseSectionDirectiveObjCInstMeth(StringRef, SMLoc) {
359  return parseSectionSwitch("__OBJC", "__inst_meth",
361  }
362 
363  bool parseSectionDirectiveObjCClsRefs(StringRef, SMLoc) {
364  return parseSectionSwitch("__OBJC", "__cls_refs",
367  }
368 
369  bool parseSectionDirectiveObjCMessageRefs(StringRef, SMLoc) {
370  return parseSectionSwitch("__OBJC", "__message_refs",
373  }
374 
375  bool parseSectionDirectiveObjCSymbols(StringRef, SMLoc) {
376  return parseSectionSwitch("__OBJC", "__symbols",
378  }
379 
380  bool parseSectionDirectiveObjCCategory(StringRef, SMLoc) {
381  return parseSectionSwitch("__OBJC", "__category",
383  }
384 
385  bool parseSectionDirectiveObjCClassVars(StringRef, SMLoc) {
386  return parseSectionSwitch("__OBJC", "__class_vars",
388  }
389 
390  bool parseSectionDirectiveObjCInstanceVars(StringRef, SMLoc) {
391  return parseSectionSwitch("__OBJC", "__instance_vars",
393  }
394 
395  bool parseSectionDirectiveObjCModuleInfo(StringRef, SMLoc) {
396  return parseSectionSwitch("__OBJC", "__module_info",
398  }
399 
400  bool parseSectionDirectiveObjCClassNames(StringRef, SMLoc) {
401  return parseSectionSwitch("__TEXT", "__cstring",
403  }
404 
405  bool parseSectionDirectiveObjCMethVarTypes(StringRef, SMLoc) {
406  return parseSectionSwitch("__TEXT", "__cstring",
408  }
409 
410  bool parseSectionDirectiveObjCMethVarNames(StringRef, SMLoc) {
411  return parseSectionSwitch("__TEXT", "__cstring",
413  }
414 
415  bool parseSectionDirectiveObjCSelectorStrs(StringRef, SMLoc) {
416  return parseSectionSwitch("__OBJC", "__selector_strs",
418  }
419 
420  bool parseSectionDirectiveTData(StringRef, SMLoc) {
421  return parseSectionSwitch("__DATA", "__thread_data",
423  }
424 
425  bool parseSectionDirectiveText(StringRef, SMLoc) {
426  return parseSectionSwitch("__TEXT", "__text",
428  }
429 
430  bool parseSectionDirectiveTLV(StringRef, SMLoc) {
431  return parseSectionSwitch("__DATA", "__thread_vars",
433  }
434 
435  bool parseSectionDirectiveIdent(StringRef, SMLoc) {
436  // Darwin silently ignores the .ident directive.
437  getParser().eatToEndOfStatement();
438  return false;
439  }
440 
441  bool parseSectionDirectiveThreadInitFunc(StringRef, SMLoc) {
442  return parseSectionSwitch("__DATA", "__thread_init",
444  }
445 
446  bool parseWatchOSVersionMin(StringRef Directive, SMLoc Loc) {
447  return parseVersionMin(Directive, Loc, MCVM_WatchOSVersionMin);
448  }
449  bool parseTvOSVersionMin(StringRef Directive, SMLoc Loc) {
450  return parseVersionMin(Directive, Loc, MCVM_TvOSVersionMin);
451  }
452  bool parseIOSVersionMin(StringRef Directive, SMLoc Loc) {
453  return parseVersionMin(Directive, Loc, MCVM_IOSVersionMin);
454  }
455  bool parseMacOSXVersionMin(StringRef Directive, SMLoc Loc) {
456  return parseVersionMin(Directive, Loc, MCVM_OSXVersionMin);
457  }
458 
459  bool parseBuildVersion(StringRef Directive, SMLoc Loc);
460  bool parseVersionMin(StringRef Directive, SMLoc Loc, MCVersionMinType Type);
461  bool parseMajorMinorVersionComponent(unsigned *Major, unsigned *Minor,
462  const char *VersionName);
463  bool parseOptionalTrailingVersionComponent(unsigned *Component,
464  const char *ComponentName);
465  bool parseVersion(unsigned *Major, unsigned *Minor, unsigned *Update);
466  bool parseSDKVersion(VersionTuple &SDKVersion);
467  void checkVersion(StringRef Directive, StringRef Arg, SMLoc Loc,
468  Triple::OSType ExpectedOS);
469 };
470 
471 } // end anonymous namespace
472 
473 bool DarwinAsmParser::parseSectionSwitch(StringRef Segment, StringRef Section,
474  unsigned TAA, unsigned Align,
475  unsigned StubSize) {
476  if (getLexer().isNot(AsmToken::EndOfStatement))
477  return TokError("unexpected token in section switching directive");
478  Lex();
479 
480  // FIXME: Arch specific.
481  bool isText = TAA & MachO::S_ATTR_PURE_INSTRUCTIONS;
482  getStreamer().SwitchSection(getContext().getMachOSection(
483  Segment, Section, TAA, StubSize,
485 
486  // Set the implicit alignment, if any.
487  //
488  // FIXME: This isn't really what 'as' does; I think it just uses the implicit
489  // alignment on the section (e.g., if one manually inserts bytes into the
490  // section, then just issuing the section switch directive will not realign
491  // the section. However, this is arguably more reasonable behavior, and there
492  // is no good reason for someone to intentionally emit incorrectly sized
493  // values into the implicitly aligned sections.
494  if (Align)
495  getStreamer().EmitValueToAlignment(Align);
496 
497  return false;
498 }
499 
500 /// parseDirectiveAltEntry
501 /// ::= .alt_entry identifier
502 bool DarwinAsmParser::parseDirectiveAltEntry(StringRef, SMLoc) {
503  StringRef Name;
504  if (getParser().parseIdentifier(Name))
505  return TokError("expected identifier in directive");
506 
507  // Look up symbol.
508  MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
509 
510  if (Sym->isDefined())
511  return TokError(".alt_entry must preceed symbol definition");
512 
513  if (!getStreamer().EmitSymbolAttribute(Sym, MCSA_AltEntry))
514  return TokError("unable to emit symbol attribute");
515 
516  Lex();
517  return false;
518 }
519 
520 /// parseDirectiveDesc
521 /// ::= .desc identifier , expression
522 bool DarwinAsmParser::parseDirectiveDesc(StringRef, SMLoc) {
523  StringRef Name;
524  if (getParser().parseIdentifier(Name))
525  return TokError("expected identifier in directive");
526 
527  // Handle the identifier as the key symbol.
528  MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
529 
530  if (getLexer().isNot(AsmToken::Comma))
531  return TokError("unexpected token in '.desc' directive");
532  Lex();
533 
534  int64_t DescValue;
535  if (getParser().parseAbsoluteExpression(DescValue))
536  return true;
537 
538  if (getLexer().isNot(AsmToken::EndOfStatement))
539  return TokError("unexpected token in '.desc' directive");
540 
541  Lex();
542 
543  // Set the n_desc field of this Symbol to this DescValue
544  getStreamer().EmitSymbolDesc(Sym, DescValue);
545 
546  return false;
547 }
548 
549 /// parseDirectiveIndirectSymbol
550 /// ::= .indirect_symbol identifier
551 bool DarwinAsmParser::parseDirectiveIndirectSymbol(StringRef, SMLoc Loc) {
552  const MCSectionMachO *Current = static_cast<const MCSectionMachO *>(
553  getStreamer().getCurrentSectionOnly());
555  if (SectionType != MachO::S_NON_LAZY_SYMBOL_POINTERS &&
556  SectionType != MachO::S_LAZY_SYMBOL_POINTERS &&
558  SectionType != MachO::S_SYMBOL_STUBS)
559  return Error(Loc, "indirect symbol not in a symbol pointer or stub "
560  "section");
561 
562  StringRef Name;
563  if (getParser().parseIdentifier(Name))
564  return TokError("expected identifier in .indirect_symbol directive");
565 
566  MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
567 
568  // Assembler local symbols don't make any sense here. Complain loudly.
569  if (Sym->isTemporary())
570  return TokError("non-local symbol required in directive");
571 
572  if (!getStreamer().EmitSymbolAttribute(Sym, MCSA_IndirectSymbol))
573  return TokError("unable to emit indirect symbol attribute for: " + Name);
574 
575  if (getLexer().isNot(AsmToken::EndOfStatement))
576  return TokError("unexpected token in '.indirect_symbol' directive");
577 
578  Lex();
579 
580  return false;
581 }
582 
583 /// parseDirectiveDumpOrLoad
584 /// ::= ( .dump | .load ) "filename"
585 bool DarwinAsmParser::parseDirectiveDumpOrLoad(StringRef Directive,
586  SMLoc IDLoc) {
587  bool IsDump = Directive == ".dump";
588  if (getLexer().isNot(AsmToken::String))
589  return TokError("expected string in '.dump' or '.load' directive");
590 
591  Lex();
592 
593  if (getLexer().isNot(AsmToken::EndOfStatement))
594  return TokError("unexpected token in '.dump' or '.load' directive");
595 
596  Lex();
597 
598  // FIXME: If/when .dump and .load are implemented they will be done in the
599  // the assembly parser and not have any need for an MCStreamer API.
600  if (IsDump)
601  return Warning(IDLoc, "ignoring directive .dump for now");
602  else
603  return Warning(IDLoc, "ignoring directive .load for now");
604 }
605 
606 /// ParseDirectiveLinkerOption
607 /// ::= .linker_option "string" ( , "string" )*
608 bool DarwinAsmParser::parseDirectiveLinkerOption(StringRef IDVal, SMLoc) {
610  while (true) {
611  if (getLexer().isNot(AsmToken::String))
612  return TokError("expected string in '" + Twine(IDVal) + "' directive");
613 
614  std::string Data;
615  if (getParser().parseEscapedString(Data))
616  return true;
617 
618  Args.push_back(Data);
619 
620  if (getLexer().is(AsmToken::EndOfStatement))
621  break;
622 
623  if (getLexer().isNot(AsmToken::Comma))
624  return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
625  Lex();
626  }
627 
628  getStreamer().EmitLinkerOptions(Args);
629  return false;
630 }
631 
632 /// parseDirectiveLsym
633 /// ::= .lsym identifier , expression
634 bool DarwinAsmParser::parseDirectiveLsym(StringRef, SMLoc) {
635  StringRef Name;
636  if (getParser().parseIdentifier(Name))
637  return TokError("expected identifier in directive");
638 
639  // Handle the identifier as the key symbol.
640  MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
641 
642  if (getLexer().isNot(AsmToken::Comma))
643  return TokError("unexpected token in '.lsym' directive");
644  Lex();
645 
646  const MCExpr *Value;
647  if (getParser().parseExpression(Value))
648  return true;
649 
650  if (getLexer().isNot(AsmToken::EndOfStatement))
651  return TokError("unexpected token in '.lsym' directive");
652 
653  Lex();
654 
655  // We don't currently support this directive.
656  //
657  // FIXME: Diagnostic location!
658  (void) Sym;
659  return TokError("directive '.lsym' is unsupported");
660 }
661 
662 /// parseDirectiveSection:
663 /// ::= .section identifier (',' identifier)*
664 bool DarwinAsmParser::parseDirectiveSection(StringRef, SMLoc) {
665  SMLoc Loc = getLexer().getLoc();
666 
668  if (getParser().parseIdentifier(SectionName))
669  return Error(Loc, "expected identifier after '.section' directive");
670 
671  // Verify there is a following comma.
672  if (!getLexer().is(AsmToken::Comma))
673  return TokError("unexpected token in '.section' directive");
674 
675  std::string SectionSpec = SectionName;
676  SectionSpec += ",";
677 
678  // Add all the tokens until the end of the line, ParseSectionSpecifier will
679  // handle this.
680  StringRef EOL = getLexer().LexUntilEndOfStatement();
681  SectionSpec.append(EOL.begin(), EOL.end());
682 
683  Lex();
684  if (getLexer().isNot(AsmToken::EndOfStatement))
685  return TokError("unexpected token in '.section' directive");
686  Lex();
687 
688  StringRef Segment, Section;
689  unsigned StubSize;
690  unsigned TAA;
691  bool TAAParsed;
692  std::string ErrorStr =
693  MCSectionMachO::ParseSectionSpecifier(SectionSpec, Segment, Section,
694  TAA, TAAParsed, StubSize);
695 
696  if (!ErrorStr.empty())
697  return Error(Loc, ErrorStr);
698 
699  // Issue a warning if the target is not powerpc and Section is a *coal* section.
700  Triple TT = getParser().getContext().getObjectFileInfo()->getTargetTriple();
701  Triple::ArchType ArchTy = TT.getArch();
702 
703  if (ArchTy != Triple::ppc && ArchTy != Triple::ppc64) {
704  StringRef NonCoalSection = StringSwitch<StringRef>(Section)
705  .Case("__textcoal_nt", "__text")
706  .Case("__const_coal", "__const")
707  .Case("__datacoal_nt", "__data")
708  .Default(Section);
709 
710  if (!Section.equals(NonCoalSection)) {
711  StringRef SectionVal(Loc.getPointer());
712  size_t B = SectionVal.find(',') + 1, E = SectionVal.find(',', B);
713  SMLoc BLoc = SMLoc::getFromPointer(SectionVal.data() + B);
714  SMLoc ELoc = SMLoc::getFromPointer(SectionVal.data() + E);
715  getParser().Warning(Loc, "section \"" + Section + "\" is deprecated",
716  SMRange(BLoc, ELoc));
717  getParser().Note(Loc, "change section name to \"" + NonCoalSection +
718  "\"", SMRange(BLoc, ELoc));
719  }
720  }
721 
722  // FIXME: Arch specific.
723  bool isText = Segment == "__TEXT"; // FIXME: Hack.
724  getStreamer().SwitchSection(getContext().getMachOSection(
725  Segment, Section, TAA, StubSize,
727  return false;
728 }
729 
730 /// ParseDirectivePushSection:
731 /// ::= .pushsection identifier (',' identifier)*
732 bool DarwinAsmParser::parseDirectivePushSection(StringRef S, SMLoc Loc) {
733  getStreamer().PushSection();
734 
735  if (parseDirectiveSection(S, Loc)) {
736  getStreamer().PopSection();
737  return true;
738  }
739 
740  return false;
741 }
742 
743 /// ParseDirectivePopSection:
744 /// ::= .popsection
745 bool DarwinAsmParser::parseDirectivePopSection(StringRef, SMLoc) {
746  if (!getStreamer().PopSection())
747  return TokError(".popsection without corresponding .pushsection");
748  return false;
749 }
750 
751 /// ParseDirectivePrevious:
752 /// ::= .previous
753 bool DarwinAsmParser::parseDirectivePrevious(StringRef DirName, SMLoc) {
754  MCSectionSubPair PreviousSection = getStreamer().getPreviousSection();
755  if (!PreviousSection.first)
756  return TokError(".previous without corresponding .section");
757  getStreamer().SwitchSection(PreviousSection.first, PreviousSection.second);
758  return false;
759 }
760 
761 /// ParseDirectiveSecureLogUnique
762 /// ::= .secure_log_unique ... message ...
763 bool DarwinAsmParser::parseDirectiveSecureLogUnique(StringRef, SMLoc IDLoc) {
764  StringRef LogMessage = getParser().parseStringToEndOfStatement();
765  if (getLexer().isNot(AsmToken::EndOfStatement))
766  return TokError("unexpected token in '.secure_log_unique' directive");
767 
768  if (getContext().getSecureLogUsed())
769  return Error(IDLoc, ".secure_log_unique specified multiple times");
770 
771  // Get the secure log path.
772  const char *SecureLogFile = getContext().getSecureLogFile();
773  if (!SecureLogFile)
774  return Error(IDLoc, ".secure_log_unique used but AS_SECURE_LOG_FILE "
775  "environment variable unset.");
776 
777  // Open the secure log file if we haven't already.
778  raw_fd_ostream *OS = getContext().getSecureLog();
779  if (!OS) {
780  std::error_code EC;
781  auto NewOS = std::make_unique<raw_fd_ostream>(
782  StringRef(SecureLogFile), EC, sys::fs::OF_Append | sys::fs::OF_Text);
783  if (EC)
784  return Error(IDLoc, Twine("can't open secure log file: ") +
785  SecureLogFile + " (" + EC.message() + ")");
786  OS = NewOS.get();
787  getContext().setSecureLog(std::move(NewOS));
788  }
789 
790  // Write the message.
791  unsigned CurBuf = getSourceManager().FindBufferContainingLoc(IDLoc);
792  *OS << getSourceManager().getBufferInfo(CurBuf).Buffer->getBufferIdentifier()
793  << ":" << getSourceManager().FindLineNumber(IDLoc, CurBuf) << ":"
794  << LogMessage + "\n";
795 
796  getContext().setSecureLogUsed(true);
797 
798  return false;
799 }
800 
801 /// ParseDirectiveSecureLogReset
802 /// ::= .secure_log_reset
803 bool DarwinAsmParser::parseDirectiveSecureLogReset(StringRef, SMLoc IDLoc) {
804  if (getLexer().isNot(AsmToken::EndOfStatement))
805  return TokError("unexpected token in '.secure_log_reset' directive");
806 
807  Lex();
808 
809  getContext().setSecureLogUsed(false);
810 
811  return false;
812 }
813 
814 /// parseDirectiveSubsectionsViaSymbols
815 /// ::= .subsections_via_symbols
816 bool DarwinAsmParser::parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc) {
817  if (getLexer().isNot(AsmToken::EndOfStatement))
818  return TokError("unexpected token in '.subsections_via_symbols' directive");
819 
820  Lex();
821 
822  getStreamer().EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
823 
824  return false;
825 }
826 
827 /// ParseDirectiveTBSS
828 /// ::= .tbss identifier, size, align
829 bool DarwinAsmParser::parseDirectiveTBSS(StringRef, SMLoc) {
830  SMLoc IDLoc = getLexer().getLoc();
831  StringRef Name;
832  if (getParser().parseIdentifier(Name))
833  return TokError("expected identifier in directive");
834 
835  // Handle the identifier as the key symbol.
836  MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
837 
838  if (getLexer().isNot(AsmToken::Comma))
839  return TokError("unexpected token in directive");
840  Lex();
841 
842  int64_t Size;
843  SMLoc SizeLoc = getLexer().getLoc();
844  if (getParser().parseAbsoluteExpression(Size))
845  return true;
846 
847  int64_t Pow2Alignment = 0;
848  SMLoc Pow2AlignmentLoc;
849  if (getLexer().is(AsmToken::Comma)) {
850  Lex();
851  Pow2AlignmentLoc = getLexer().getLoc();
852  if (getParser().parseAbsoluteExpression(Pow2Alignment))
853  return true;
854  }
855 
856  if (getLexer().isNot(AsmToken::EndOfStatement))
857  return TokError("unexpected token in '.tbss' directive");
858 
859  Lex();
860 
861  if (Size < 0)
862  return Error(SizeLoc, "invalid '.tbss' directive size, can't be less than"
863  "zero");
864 
865  // FIXME: Diagnose overflow.
866  if (Pow2Alignment < 0)
867  return Error(Pow2AlignmentLoc, "invalid '.tbss' alignment, can't be less"
868  "than zero");
869 
870  if (!Sym->isUndefined())
871  return Error(IDLoc, "invalid symbol redefinition");
872 
873  getStreamer().EmitTBSSSymbol(getContext().getMachOSection(
874  "__DATA", "__thread_bss",
877  Sym, Size, 1 << Pow2Alignment);
878 
879  return false;
880 }
881 
882 /// ParseDirectiveZerofill
883 /// ::= .zerofill segname , sectname [, identifier , size_expression [
884 /// , align_expression ]]
885 bool DarwinAsmParser::parseDirectiveZerofill(StringRef, SMLoc) {
886  StringRef Segment;
887  if (getParser().parseIdentifier(Segment))
888  return TokError("expected segment name after '.zerofill' directive");
889 
890  if (getLexer().isNot(AsmToken::Comma))
891  return TokError("unexpected token in directive");
892  Lex();
893 
895  SMLoc SectionLoc = getLexer().getLoc();
896  if (getParser().parseIdentifier(Section))
897  return TokError("expected section name after comma in '.zerofill' "
898  "directive");
899 
900  // If this is the end of the line all that was wanted was to create the
901  // the section but with no symbol.
902  if (getLexer().is(AsmToken::EndOfStatement)) {
903  // Create the zerofill section but no symbol
904  getStreamer().EmitZerofill(
905  getContext().getMachOSection(Segment, Section, MachO::S_ZEROFILL, 0,
907  /*Symbol=*/nullptr, /*Size=*/0, /*ByteAlignment=*/0, SectionLoc);
908  return false;
909  }
910 
911  if (getLexer().isNot(AsmToken::Comma))
912  return TokError("unexpected token in directive");
913  Lex();
914 
915  SMLoc IDLoc = getLexer().getLoc();
916  StringRef IDStr;
917  if (getParser().parseIdentifier(IDStr))
918  return TokError("expected identifier in directive");
919 
920  // handle the identifier as the key symbol.
921  MCSymbol *Sym = getContext().getOrCreateSymbol(IDStr);
922 
923  if (getLexer().isNot(AsmToken::Comma))
924  return TokError("unexpected token in directive");
925  Lex();
926 
927  int64_t Size;
928  SMLoc SizeLoc = getLexer().getLoc();
929  if (getParser().parseAbsoluteExpression(Size))
930  return true;
931 
932  int64_t Pow2Alignment = 0;
933  SMLoc Pow2AlignmentLoc;
934  if (getLexer().is(AsmToken::Comma)) {
935  Lex();
936  Pow2AlignmentLoc = getLexer().getLoc();
937  if (getParser().parseAbsoluteExpression(Pow2Alignment))
938  return true;
939  }
940 
941  if (getLexer().isNot(AsmToken::EndOfStatement))
942  return TokError("unexpected token in '.zerofill' directive");
943 
944  Lex();
945 
946  if (Size < 0)
947  return Error(SizeLoc, "invalid '.zerofill' directive size, can't be less "
948  "than zero");
949 
950  // NOTE: The alignment in the directive is a power of 2 value, the assembler
951  // may internally end up wanting an alignment in bytes.
952  // FIXME: Diagnose overflow.
953  if (Pow2Alignment < 0)
954  return Error(Pow2AlignmentLoc, "invalid '.zerofill' directive alignment, "
955  "can't be less than zero");
956 
957  if (!Sym->isUndefined())
958  return Error(IDLoc, "invalid symbol redefinition");
959 
960  // Create the zerofill Symbol with Size and Pow2Alignment
961  //
962  // FIXME: Arch specific.
963  getStreamer().EmitZerofill(getContext().getMachOSection(
964  Segment, Section, MachO::S_ZEROFILL,
965  0, SectionKind::getBSS()),
966  Sym, Size, 1 << Pow2Alignment, SectionLoc);
967 
968  return false;
969 }
970 
971 /// ParseDirectiveDataRegion
972 /// ::= .data_region [ ( jt8 | jt16 | jt32 ) ]
973 bool DarwinAsmParser::parseDirectiveDataRegion(StringRef, SMLoc) {
974  if (getLexer().is(AsmToken::EndOfStatement)) {
975  Lex();
976  getStreamer().EmitDataRegion(MCDR_DataRegion);
977  return false;
978  }
979  StringRef RegionType;
980  SMLoc Loc = getParser().getTok().getLoc();
981  if (getParser().parseIdentifier(RegionType))
982  return TokError("expected region type after '.data_region' directive");
983  int Kind = StringSwitch<int>(RegionType)
984  .Case("jt8", MCDR_DataRegionJT8)
985  .Case("jt16", MCDR_DataRegionJT16)
986  .Case("jt32", MCDR_DataRegionJT32)
987  .Default(-1);
988  if (Kind == -1)
989  return Error(Loc, "unknown region type in '.data_region' directive");
990  Lex();
991 
992  getStreamer().EmitDataRegion((MCDataRegionType)Kind);
993  return false;
994 }
995 
996 /// ParseDirectiveDataRegionEnd
997 /// ::= .end_data_region
998 bool DarwinAsmParser::parseDirectiveDataRegionEnd(StringRef, SMLoc) {
999  if (getLexer().isNot(AsmToken::EndOfStatement))
1000  return TokError("unexpected token in '.end_data_region' directive");
1001 
1002  Lex();
1003  getStreamer().EmitDataRegion(MCDR_DataRegionEnd);
1004  return false;
1005 }
1006 
1007 static bool isSDKVersionToken(const AsmToken &Tok) {
1008  return Tok.is(AsmToken::Identifier) && Tok.getIdentifier() == "sdk_version";
1009 }
1010 
1011 /// parseMajorMinorVersionComponent ::= major, minor
1012 bool DarwinAsmParser::parseMajorMinorVersionComponent(unsigned *Major,
1013  unsigned *Minor,
1014  const char *VersionName) {
1015  // Get the major version number.
1016  if (getLexer().isNot(AsmToken::Integer))
1017  return TokError(Twine("invalid ") + VersionName +
1018  " major version number, integer expected");
1019  int64_t MajorVal = getLexer().getTok().getIntVal();
1020  if (MajorVal > 65535 || MajorVal <= 0)
1021  return TokError(Twine("invalid ") + VersionName + " major version number");
1022  *Major = (unsigned)MajorVal;
1023  Lex();
1024  if (getLexer().isNot(AsmToken::Comma))
1025  return TokError(Twine(VersionName) +
1026  " minor version number required, comma expected");
1027  Lex();
1028  // Get the minor version number.
1029  if (getLexer().isNot(AsmToken::Integer))
1030  return TokError(Twine("invalid ") + VersionName +
1031  " minor version number, integer expected");
1032  int64_t MinorVal = getLexer().getTok().getIntVal();
1033  if (MinorVal > 255 || MinorVal < 0)
1034  return TokError(Twine("invalid ") + VersionName + " minor version number");
1035  *Minor = MinorVal;
1036  Lex();
1037  return false;
1038 }
1039 
1040 /// parseOptionalTrailingVersionComponent ::= , version_number
1041 bool DarwinAsmParser::parseOptionalTrailingVersionComponent(
1042  unsigned *Component, const char *ComponentName) {
1043  assert(getLexer().is(AsmToken::Comma) && "comma expected");
1044  Lex();
1045  if (getLexer().isNot(AsmToken::Integer))
1046  return TokError(Twine("invalid ") + ComponentName +
1047  " version number, integer expected");
1048  int64_t Val = getLexer().getTok().getIntVal();
1049  if (Val > 255 || Val < 0)
1050  return TokError(Twine("invalid ") + ComponentName + " version number");
1051  *Component = Val;
1052  Lex();
1053  return false;
1054 }
1055 
1056 /// parseVersion ::= parseMajorMinorVersionComponent
1057 /// parseOptionalTrailingVersionComponent
1058 bool DarwinAsmParser::parseVersion(unsigned *Major, unsigned *Minor,
1059  unsigned *Update) {
1060  if (parseMajorMinorVersionComponent(Major, Minor, "OS"))
1061  return true;
1062 
1063  // Get the update level, if specified
1064  *Update = 0;
1065  if (getLexer().is(AsmToken::EndOfStatement) ||
1066  isSDKVersionToken(getLexer().getTok()))
1067  return false;
1068  if (getLexer().isNot(AsmToken::Comma))
1069  return TokError("invalid OS update specifier, comma expected");
1070  if (parseOptionalTrailingVersionComponent(Update, "OS update"))
1071  return true;
1072  return false;
1073 }
1074 
1075 bool DarwinAsmParser::parseSDKVersion(VersionTuple &SDKVersion) {
1076  assert(isSDKVersionToken(getLexer().getTok()) && "expected sdk_version");
1077  Lex();
1078  unsigned Major, Minor;
1079  if (parseMajorMinorVersionComponent(&Major, &Minor, "SDK"))
1080  return true;
1081  SDKVersion = VersionTuple(Major, Minor);
1082 
1083  // Get the subminor version, if specified.
1084  if (getLexer().is(AsmToken::Comma)) {
1085  unsigned Subminor;
1086  if (parseOptionalTrailingVersionComponent(&Subminor, "SDK subminor"))
1087  return true;
1088  SDKVersion = VersionTuple(Major, Minor, Subminor);
1089  }
1090  return false;
1091 }
1092 
1093 void DarwinAsmParser::checkVersion(StringRef Directive, StringRef Arg,
1094  SMLoc Loc, Triple::OSType ExpectedOS) {
1095  const Triple &Target = getContext().getObjectFileInfo()->getTargetTriple();
1096  if (Target.getOS() != ExpectedOS)
1097  Warning(Loc, Twine(Directive) +
1098  (Arg.empty() ? Twine() : Twine(' ') + Arg) +
1099  " used while targeting " + Target.getOSName());
1100 
1101  if (LastVersionDirective.isValid()) {
1102  Warning(Loc, "overriding previous version directive");
1103  Note(LastVersionDirective, "previous definition is here");
1104  }
1105  LastVersionDirective = Loc;
1106 }
1107 
1109  switch (Type) {
1111  case MCVM_TvOSVersionMin: return Triple::TvOS;
1112  case MCVM_IOSVersionMin: return Triple::IOS;
1113  case MCVM_OSXVersionMin: return Triple::MacOSX;
1114  }
1115  llvm_unreachable("Invalid mc version min type");
1116 }
1117 
1118 /// parseVersionMin
1119 /// ::= .ios_version_min parseVersion parseSDKVersion
1120 /// | .macosx_version_min parseVersion parseSDKVersion
1121 /// | .tvos_version_min parseVersion parseSDKVersion
1122 /// | .watchos_version_min parseVersion parseSDKVersion
1123 bool DarwinAsmParser::parseVersionMin(StringRef Directive, SMLoc Loc,
1125  unsigned Major;
1126  unsigned Minor;
1127  unsigned Update;
1128  if (parseVersion(&Major, &Minor, &Update))
1129  return true;
1130 
1131  VersionTuple SDKVersion;
1132  if (isSDKVersionToken(getLexer().getTok()) && parseSDKVersion(SDKVersion))
1133  return true;
1134 
1135  if (parseToken(AsmToken::EndOfStatement))
1136  return addErrorSuffix(Twine(" in '") + Directive + "' directive");
1137 
1138  Triple::OSType ExpectedOS = getOSTypeFromMCVM(Type);
1139  checkVersion(Directive, StringRef(), Loc, ExpectedOS);
1140  getStreamer().EmitVersionMin(Type, Major, Minor, Update, SDKVersion);
1141  return false;
1142 }
1143 
1145  switch (Type) {
1147  case MachO::PLATFORM_IOS: return Triple::IOS;
1148  case MachO::PLATFORM_TVOS: return Triple::TvOS;
1150  case MachO::PLATFORM_BRIDGEOS: /* silence warning */ break;
1152  case MachO::PLATFORM_IOSSIMULATOR: /* silence warning */ break;
1153  case MachO::PLATFORM_TVOSSIMULATOR: /* silence warning */ break;
1154  case MachO::PLATFORM_WATCHOSSIMULATOR: /* silence warning */ break;
1155  }
1156  llvm_unreachable("Invalid mach-o platform type");
1157 }
1158 
1159 /// parseBuildVersion
1160 /// ::= .build_version (macos|ios|tvos|watchos), parseVersion parseSDKVersion
1161 bool DarwinAsmParser::parseBuildVersion(StringRef Directive, SMLoc Loc) {
1162  StringRef PlatformName;
1163  SMLoc PlatformLoc = getTok().getLoc();
1164  if (getParser().parseIdentifier(PlatformName))
1165  return TokError("platform name expected");
1166 
1167  unsigned Platform = StringSwitch<unsigned>(PlatformName)
1168  .Case("macos", MachO::PLATFORM_MACOS)
1169  .Case("ios", MachO::PLATFORM_IOS)
1170  .Case("tvos", MachO::PLATFORM_TVOS)
1171  .Case("watchos", MachO::PLATFORM_WATCHOS)
1172  .Case("macCatalyst", MachO::PLATFORM_MACCATALYST)
1173  .Default(0);
1174  if (Platform == 0)
1175  return Error(PlatformLoc, "unknown platform name");
1176 
1177  if (getLexer().isNot(AsmToken::Comma))
1178  return TokError("version number required, comma expected");
1179  Lex();
1180 
1181  unsigned Major;
1182  unsigned Minor;
1183  unsigned Update;
1184  if (parseVersion(&Major, &Minor, &Update))
1185  return true;
1186 
1187  VersionTuple SDKVersion;
1188  if (isSDKVersionToken(getLexer().getTok()) && parseSDKVersion(SDKVersion))
1189  return true;
1190 
1191  if (parseToken(AsmToken::EndOfStatement))
1192  return addErrorSuffix(" in '.build_version' directive");
1193 
1194  Triple::OSType ExpectedOS
1196  checkVersion(Directive, PlatformName, Loc, ExpectedOS);
1197  getStreamer().EmitBuildVersion(Platform, Major, Minor, Update, SDKVersion);
1198  return false;
1199 }
1200 
1201 
1202 namespace llvm {
1203 
1205  return new DarwinAsmParser;
1206 }
1207 
1208 } // end llvm namespace
Represents a range in source code.
Definition: SMLoc.h:48
static SectionKind getData()
Definition: SectionKind.h:201
S_NON_LAZY_SYMBOL_POINTERS - Section with non-lazy symbol pointers.
Definition: MachO.h:131
S_SYMBOL_STUBS - Section with symbol stubs, byte size of stub in the Reserved2 field.
Definition: MachO.h:136
This represents a section on a Mach-O system (used by Mac OS X).
S_ATTR_PURE_INSTRUCTIONS - Section contains only true machine instructions.
Definition: MachO.h:181
This class represents lattice values for constants.
Definition: AllocatorList.h:23
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:41
Generic assembler parser interface, for use by target specific assembly parsers.
Definition: MCAsmParser.h:109
amdgpu Simplify well known AMD library false FunctionCallee Value const Twine & Name
virtual void Initialize(MCAsmParser &Parser)
Initialize the extension for parsing using the given Parser.
OSType getOS() const
getOS - Get the parsed operating system type of this triple.
Definition: Triple.h:305
.watchos_version_min
Definition: MCDirectives.h:69
void push_back(const T &Elt)
Definition: SmallVector.h:211
.ios_version_min
Definition: MCDirectives.h:66
MCAsmParserExtension * createDarwinAsmParser()
S_THREAD_LOCAL_VARIABLES - Section with thread local variable structure data.
Definition: MachO.h:164
.macosx_version_min
Definition: MCDirectives.h:67
MCDataRegionType
Definition: MCDirectives.h:57
StringSwitch & Case(StringLiteral S, T Value)
Definition: StringSwitch.h:67
StringRef getIdentifier() const
Get the identifier string for the current token, which should be an identifier or a string...
Definition: MCAsmMacro.h:99
S_4BYTE_LITERALS - Section with 4 byte literals.
Definition: MachO.h:125
static SectionKind getBSS()
Definition: SectionKind.h:197
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:80
Base class for the full range of assembler expressions which are needed for parsing.
Definition: MCExpr.h:35
LLVM_NODISCARD R Default(T Value)
Definition: StringSwitch.h:181
S_8BYTE_LITERALS - Section with 8 byte literals.
Definition: MachO.h:127
Target independent representation for an assembler token.
Definition: MCAsmMacro.h:21
.data_region jt16
Definition: MCDirectives.h:60
static bool isSDKVersionToken(const AsmToken &Tok)
LLVM_NODISCARD bool empty() const
empty - Check if the string is empty.
Definition: StringRef.h:140
S_MOD_TERM_FUNC_POINTERS - Section with only function pointers for termination.
Definition: MachO.h:142
PlatformType
Definition: MachO.h:484
ArchType getArch() const
getArch - Get the parsed architecture type of this triple.
Definition: Triple.h:296
.alt_entry (MachO)
Definition: MCDirectives.h:39
The file should be opened in text mode on platforms that make this distinction.
Definition: FileSystem.h:767
.data_region jt32
Definition: MCDirectives.h:61
const char * getPointer() const
Definition: SMLoc.h:34
A switch()-like statement whose cases are string literals.
Definition: StringSwitch.h:42
S_LITERAL_POINTERS - Section with pointers to literals.
Definition: MachO.h:129
static GCRegistry::Add< OcamlGC > B("ocaml", "ocaml 3.10-compatible GC")
static std::string ParseSectionSpecifier(StringRef Spec, StringRef &Segment, StringRef &Section, unsigned &TAA, bool &TAAParsed, unsigned &StubSize)
Parse the section specifier indicated by "Spec".
The instances of the Type class are immutable: once they are created, they are never changed...
Definition: Type.h:46
.tvos_version_min
Definition: MCDirectives.h:68
static GCRegistry::Add< CoreCLRGC > E("coreclr", "CoreCLR-compatible GC")
S_THREAD_LOCAL_ZEROFILL - Thread local zerofill section.
Definition: MachO.h:161
bool isTemporary() const
isTemporary - Check if this is an assembler temporary symbol.
Definition: MCSymbol.h:221
static Triple::OSType getOSTypeFromPlatform(MachO::PlatformType Type)
.subsections_via_symbols (MachO)
Definition: MCDirectives.h:51
amdgpu Simplify well known AMD library false FunctionCallee Value * Arg
S_THREAD_LOCAL_REGULAR - Thread local data section.
Definition: MachO.h:159
S_CSTRING_LITERALS - Section with literal C strings.
Definition: MachO.h:123
MachO::SectionType getType() const
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
S_ATTR_NO_DEAD_STRIP - No dead stripping.
Definition: MachO.h:189
This struct is a compact representation of a valid (non-zero power of two) alignment.
Definition: Alignment.h:40
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:43
S_LAZY_SYMBOL_POINTERS - Section with lazy symbol pointers.
Definition: MachO.h:133
static SectionKind getThreadBSS()
Definition: SectionKind.h:195
std::pair< MCSection *, const MCExpr * > MCSectionSubPair
Definition: MCStreamer.h:64
bool isUndefined(bool SetUsed=true) const
isUndefined - Check if this symbol undefined (i.e., implicitly defined).
Definition: MCSymbol.h:258
.indirect_symbol (MachO)
Definition: MCDirectives.h:33
StringRef getOSName() const
getOSName - Get the operating system (third) component of the triple.
Definition: Triple.cpp:998
S_THREAD_LOCAL_VARIABLE_POINTERS - Section with pointers to thread local structures.
Definition: MachO.h:167
The file should be opened in append mode.
Definition: FileSystem.h:771
S_THREAD_LOCAL_INIT_FUNCTION_POINTERS - Section with thread local variable initialization pointers to...
Definition: MachO.h:170
S_16BYTE_LITERALS - Section with only 16 byte literals.
Definition: MachO.h:152
bool is(TokenKind K) const
Definition: MCAsmMacro.h:82
bool isDefined() const
isDefined - Check if this symbol is defined (i.e., it has an address).
Definition: MCSymbol.h:249
Target - Wrapper for Target specific information.
iterator begin() const
Definition: StringRef.h:115
static SMLoc getFromPointer(const char *Ptr)
Definition: SMLoc.h:36
LLVM_NODISCARD bool equals(StringRef RHS) const
equals - Check for string equality, this is more efficient than compare() when the relative ordering ...
Definition: StringRef.h:174
Represents a version number in the form major[.minor[.subminor[.build]]].
Definition: VersionTuple.h:26
A raw_ostream that writes to a file descriptor.
Definition: raw_ostream.h:384
uint32_t Size
Definition: Profile.cpp:46
static Version parseVersion(StringRef Name)
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
.data_region jt8
Definition: MCDirectives.h:59
Generic interface for extending the MCAsmParser, which is implemented by target and object file assem...
MCVersionMinType
Definition: MCDirectives.h:65
static Triple::OSType getOSTypeFromMCVM(MCVersionMinType Type)
std::pair< MCAsmParserExtension *, DirectiveHandler > ExtensionDirectiveHandler
Definition: MCAsmParser.h:113
const char SectionName[]
Definition: AMDGPUPTNote.h:23
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
S_ZEROFILL - Zero fill on demand section.
Definition: MachO.h:121
Represents a location in source code.
Definition: SMLoc.h:23
S_MOD_INIT_FUNC_POINTERS - Section with only function pointers for initialization.
Definition: MachO.h:139
SectionType
These are the section type and attributes fields.
Definition: MachO.h:114
iterator end() const
Definition: StringRef.h:117
constexpr char Args[]
Key for Kernel::Metadata::mArgs.
.end_data_region
Definition: MCDirectives.h:62
static SectionKind getText()
Definition: SectionKind.h:179