LLVM  9.0.0svn
DarwinAsmParser.cpp
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1 //===- DarwinAsmParser.cpp - Darwin (Mach-O) Assembly Parser --------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "llvm/ADT/STLExtras.h"
11 #include "llvm/ADT/SmallVector.h"
12 #include "llvm/ADT/StringRef.h"
13 #include "llvm/ADT/StringSwitch.h"
14 #include "llvm/ADT/Triple.h"
15 #include "llvm/ADT/Twine.h"
17 #include "llvm/MC/MCContext.h"
18 #include "llvm/MC/MCDirectives.h"
23 #include "llvm/MC/MCSectionMachO.h"
24 #include "llvm/MC/MCStreamer.h"
25 #include "llvm/MC/MCSymbol.h"
26 #include "llvm/MC/SectionKind.h"
29 #include "llvm/Support/SMLoc.h"
30 #include "llvm/Support/SourceMgr.h"
32 #include <algorithm>
33 #include <cstddef>
34 #include <cstdint>
35 #include <string>
36 #include <system_error>
37 #include <utility>
38 
39 using namespace llvm;
40 
41 namespace {
42 
43 /// Implementation of directive handling which is shared across all
44 /// Darwin targets.
45 class DarwinAsmParser : public MCAsmParserExtension {
46  template<bool (DarwinAsmParser::*HandlerMethod)(StringRef, SMLoc)>
47  void addDirectiveHandler(StringRef Directive) {
48  MCAsmParser::ExtensionDirectiveHandler Handler = std::make_pair(
49  this, HandleDirective<DarwinAsmParser, HandlerMethod>);
50  getParser().addDirectiveHandler(Directive, Handler);
51  }
52 
53  bool parseSectionSwitch(StringRef Segment, StringRef Section,
54  unsigned TAA = 0, unsigned ImplicitAlign = 0,
55  unsigned StubSize = 0);
56 
57  SMLoc LastVersionDirective;
58 
59 public:
60  DarwinAsmParser() = default;
61 
62  void Initialize(MCAsmParser &Parser) override {
63  // Call the base implementation.
65 
66  addDirectiveHandler<&DarwinAsmParser::parseDirectiveAltEntry>(".alt_entry");
67  addDirectiveHandler<&DarwinAsmParser::parseDirectiveDesc>(".desc");
68  addDirectiveHandler<&DarwinAsmParser::parseDirectiveIndirectSymbol>(
69  ".indirect_symbol");
70  addDirectiveHandler<&DarwinAsmParser::parseDirectiveLsym>(".lsym");
71  addDirectiveHandler<&DarwinAsmParser::parseDirectiveSubsectionsViaSymbols>(
72  ".subsections_via_symbols");
73  addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".dump");
74  addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".load");
75  addDirectiveHandler<&DarwinAsmParser::parseDirectiveSection>(".section");
76  addDirectiveHandler<&DarwinAsmParser::parseDirectivePushSection>(
77  ".pushsection");
78  addDirectiveHandler<&DarwinAsmParser::parseDirectivePopSection>(
79  ".popsection");
80  addDirectiveHandler<&DarwinAsmParser::parseDirectivePrevious>(".previous");
81  addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogUnique>(
82  ".secure_log_unique");
83  addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogReset>(
84  ".secure_log_reset");
85  addDirectiveHandler<&DarwinAsmParser::parseDirectiveTBSS>(".tbss");
86  addDirectiveHandler<&DarwinAsmParser::parseDirectiveZerofill>(".zerofill");
87 
88  addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegion>(
89  ".data_region");
90  addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegionEnd>(
91  ".end_data_region");
92 
93  // Special section directives.
94  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveBss>(".bss");
95  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConst>(".const");
96  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstData>(
97  ".const_data");
98  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstructor>(
99  ".constructor");
100  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveCString>(
101  ".cstring");
102  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveData>(".data");
103  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDestructor>(
104  ".destructor");
105  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDyld>(".dyld");
106  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit0>(
107  ".fvmlib_init0");
108  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit1>(
109  ".fvmlib_init1");
110  addDirectiveHandler<
111  &DarwinAsmParser::parseSectionDirectiveLazySymbolPointers>(
112  ".lazy_symbol_pointer");
113  addDirectiveHandler<&DarwinAsmParser::parseDirectiveLinkerOption>(
114  ".linker_option");
115  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral16>(
116  ".literal16");
117  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral4>(
118  ".literal4");
119  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral8>(
120  ".literal8");
121  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModInitFunc>(
122  ".mod_init_func");
123  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModTermFunc>(
124  ".mod_term_func");
125  addDirectiveHandler<
126  &DarwinAsmParser::parseSectionDirectiveNonLazySymbolPointers>(
127  ".non_lazy_symbol_pointer");
128  addDirectiveHandler<
129  &DarwinAsmParser::parseSectionDirectiveThreadLocalVariablePointers>(
130  ".thread_local_variable_pointer");
131  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatClsMeth>(
132  ".objc_cat_cls_meth");
133  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatInstMeth>(
134  ".objc_cat_inst_meth");
135  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCategory>(
136  ".objc_category");
137  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClass>(
138  ".objc_class");
139  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassNames>(
140  ".objc_class_names");
141  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassVars>(
142  ".objc_class_vars");
143  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsMeth>(
144  ".objc_cls_meth");
145  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsRefs>(
146  ".objc_cls_refs");
147  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCInstMeth>(
148  ".objc_inst_meth");
149  addDirectiveHandler<
150  &DarwinAsmParser::parseSectionDirectiveObjCInstanceVars>(
151  ".objc_instance_vars");
152  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMessageRefs>(
153  ".objc_message_refs");
154  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMetaClass>(
155  ".objc_meta_class");
156  addDirectiveHandler<
157  &DarwinAsmParser::parseSectionDirectiveObjCMethVarNames>(
158  ".objc_meth_var_names");
159  addDirectiveHandler<
160  &DarwinAsmParser::parseSectionDirectiveObjCMethVarTypes>(
161  ".objc_meth_var_types");
162  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCModuleInfo>(
163  ".objc_module_info");
164  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCProtocol>(
165  ".objc_protocol");
166  addDirectiveHandler<
167  &DarwinAsmParser::parseSectionDirectiveObjCSelectorStrs>(
168  ".objc_selector_strs");
169  addDirectiveHandler<
170  &DarwinAsmParser::parseSectionDirectiveObjCStringObject>(
171  ".objc_string_object");
172  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCSymbols>(
173  ".objc_symbols");
174  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectivePICSymbolStub>(
175  ".picsymbol_stub");
176  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticConst>(
177  ".static_const");
178  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticData>(
179  ".static_data");
180  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveSymbolStub>(
181  ".symbol_stub");
182  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTData>(".tdata");
183  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveText>(".text");
184  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveThreadInitFunc>(
185  ".thread_init_func");
186  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTLV>(".tlv");
187 
188  addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveIdent>(".ident");
189  addDirectiveHandler<&DarwinAsmParser::parseWatchOSVersionMin>(
190  ".watchos_version_min");
191  addDirectiveHandler<&DarwinAsmParser::parseTvOSVersionMin>(
192  ".tvos_version_min");
193  addDirectiveHandler<&DarwinAsmParser::parseIOSVersionMin>(
194  ".ios_version_min");
195  addDirectiveHandler<&DarwinAsmParser::parseMacOSXVersionMin>(
196  ".macosx_version_min");
197  addDirectiveHandler<&DarwinAsmParser::parseBuildVersion>(".build_version");
198 
199  LastVersionDirective = SMLoc();
200  }
201 
202  bool parseDirectiveAltEntry(StringRef, SMLoc);
203  bool parseDirectiveDesc(StringRef, SMLoc);
204  bool parseDirectiveIndirectSymbol(StringRef, SMLoc);
205  bool parseDirectiveDumpOrLoad(StringRef, SMLoc);
206  bool parseDirectiveLsym(StringRef, SMLoc);
207  bool parseDirectiveLinkerOption(StringRef, SMLoc);
208  bool parseDirectiveSection(StringRef, SMLoc);
209  bool parseDirectivePushSection(StringRef, SMLoc);
210  bool parseDirectivePopSection(StringRef, SMLoc);
211  bool parseDirectivePrevious(StringRef, SMLoc);
212  bool parseDirectiveSecureLogReset(StringRef, SMLoc);
213  bool parseDirectiveSecureLogUnique(StringRef, SMLoc);
214  bool parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc);
215  bool parseDirectiveTBSS(StringRef, SMLoc);
216  bool parseDirectiveZerofill(StringRef, SMLoc);
217  bool parseDirectiveDataRegion(StringRef, SMLoc);
218  bool parseDirectiveDataRegionEnd(StringRef, SMLoc);
219 
220  // Named Section Directive
221  bool parseSectionDirectiveBss(StringRef, SMLoc) {
222  return parseSectionSwitch("__DATA", "__bss");
223  }
224 
225  bool parseSectionDirectiveConst(StringRef, SMLoc) {
226  return parseSectionSwitch("__TEXT", "__const");
227  }
228 
229  bool parseSectionDirectiveStaticConst(StringRef, SMLoc) {
230  return parseSectionSwitch("__TEXT", "__static_const");
231  }
232 
233  bool parseSectionDirectiveCString(StringRef, SMLoc) {
234  return parseSectionSwitch("__TEXT","__cstring",
236  }
237 
238  bool parseSectionDirectiveLiteral4(StringRef, SMLoc) {
239  return parseSectionSwitch("__TEXT", "__literal4",
241  }
242 
243  bool parseSectionDirectiveLiteral8(StringRef, SMLoc) {
244  return parseSectionSwitch("__TEXT", "__literal8",
246  }
247 
248  bool parseSectionDirectiveLiteral16(StringRef, SMLoc) {
249  return parseSectionSwitch("__TEXT","__literal16",
251  }
252 
253  bool parseSectionDirectiveConstructor(StringRef, SMLoc) {
254  return parseSectionSwitch("__TEXT","__constructor");
255  }
256 
257  bool parseSectionDirectiveDestructor(StringRef, SMLoc) {
258  return parseSectionSwitch("__TEXT","__destructor");
259  }
260 
261  bool parseSectionDirectiveFVMLibInit0(StringRef, SMLoc) {
262  return parseSectionSwitch("__TEXT","__fvmlib_init0");
263  }
264 
265  bool parseSectionDirectiveFVMLibInit1(StringRef, SMLoc) {
266  return parseSectionSwitch("__TEXT","__fvmlib_init1");
267  }
268 
269  bool parseSectionDirectiveSymbolStub(StringRef, SMLoc) {
270  return parseSectionSwitch("__TEXT","__symbol_stub",
273  // FIXME: Different on PPC and ARM.
274  0, 16);
275  }
276 
277  bool parseSectionDirectivePICSymbolStub(StringRef, SMLoc) {
278  return parseSectionSwitch("__TEXT","__picsymbol_stub",
281  }
282 
283  bool parseSectionDirectiveData(StringRef, SMLoc) {
284  return parseSectionSwitch("__DATA", "__data");
285  }
286 
287  bool parseSectionDirectiveStaticData(StringRef, SMLoc) {
288  return parseSectionSwitch("__DATA", "__static_data");
289  }
290 
291  bool parseSectionDirectiveNonLazySymbolPointers(StringRef, SMLoc) {
292  return parseSectionSwitch("__DATA", "__nl_symbol_ptr",
294  }
295 
296  bool parseSectionDirectiveLazySymbolPointers(StringRef, SMLoc) {
297  return parseSectionSwitch("__DATA", "__la_symbol_ptr",
299  }
300 
301  bool parseSectionDirectiveThreadLocalVariablePointers(StringRef, SMLoc) {
302  return parseSectionSwitch("__DATA", "__thread_ptr",
304  }
305 
306  bool parseSectionDirectiveDyld(StringRef, SMLoc) {
307  return parseSectionSwitch("__DATA", "__dyld");
308  }
309 
310  bool parseSectionDirectiveModInitFunc(StringRef, SMLoc) {
311  return parseSectionSwitch("__DATA", "__mod_init_func",
313  }
314 
315  bool parseSectionDirectiveModTermFunc(StringRef, SMLoc) {
316  return parseSectionSwitch("__DATA", "__mod_term_func",
318  }
319 
320  bool parseSectionDirectiveConstData(StringRef, SMLoc) {
321  return parseSectionSwitch("__DATA", "__const");
322  }
323 
324  bool parseSectionDirectiveObjCClass(StringRef, SMLoc) {
325  return parseSectionSwitch("__OBJC", "__class",
327  }
328 
329  bool parseSectionDirectiveObjCMetaClass(StringRef, SMLoc) {
330  return parseSectionSwitch("__OBJC", "__meta_class",
332  }
333 
334  bool parseSectionDirectiveObjCCatClsMeth(StringRef, SMLoc) {
335  return parseSectionSwitch("__OBJC", "__cat_cls_meth",
337  }
338 
339  bool parseSectionDirectiveObjCCatInstMeth(StringRef, SMLoc) {
340  return parseSectionSwitch("__OBJC", "__cat_inst_meth",
342  }
343 
344  bool parseSectionDirectiveObjCProtocol(StringRef, SMLoc) {
345  return parseSectionSwitch("__OBJC", "__protocol",
347  }
348 
349  bool parseSectionDirectiveObjCStringObject(StringRef, SMLoc) {
350  return parseSectionSwitch("__OBJC", "__string_object",
352  }
353 
354  bool parseSectionDirectiveObjCClsMeth(StringRef, SMLoc) {
355  return parseSectionSwitch("__OBJC", "__cls_meth",
357  }
358 
359  bool parseSectionDirectiveObjCInstMeth(StringRef, SMLoc) {
360  return parseSectionSwitch("__OBJC", "__inst_meth",
362  }
363 
364  bool parseSectionDirectiveObjCClsRefs(StringRef, SMLoc) {
365  return parseSectionSwitch("__OBJC", "__cls_refs",
368  }
369 
370  bool parseSectionDirectiveObjCMessageRefs(StringRef, SMLoc) {
371  return parseSectionSwitch("__OBJC", "__message_refs",
374  }
375 
376  bool parseSectionDirectiveObjCSymbols(StringRef, SMLoc) {
377  return parseSectionSwitch("__OBJC", "__symbols",
379  }
380 
381  bool parseSectionDirectiveObjCCategory(StringRef, SMLoc) {
382  return parseSectionSwitch("__OBJC", "__category",
384  }
385 
386  bool parseSectionDirectiveObjCClassVars(StringRef, SMLoc) {
387  return parseSectionSwitch("__OBJC", "__class_vars",
389  }
390 
391  bool parseSectionDirectiveObjCInstanceVars(StringRef, SMLoc) {
392  return parseSectionSwitch("__OBJC", "__instance_vars",
394  }
395 
396  bool parseSectionDirectiveObjCModuleInfo(StringRef, SMLoc) {
397  return parseSectionSwitch("__OBJC", "__module_info",
399  }
400 
401  bool parseSectionDirectiveObjCClassNames(StringRef, SMLoc) {
402  return parseSectionSwitch("__TEXT", "__cstring",
404  }
405 
406  bool parseSectionDirectiveObjCMethVarTypes(StringRef, SMLoc) {
407  return parseSectionSwitch("__TEXT", "__cstring",
409  }
410 
411  bool parseSectionDirectiveObjCMethVarNames(StringRef, SMLoc) {
412  return parseSectionSwitch("__TEXT", "__cstring",
414  }
415 
416  bool parseSectionDirectiveObjCSelectorStrs(StringRef, SMLoc) {
417  return parseSectionSwitch("__OBJC", "__selector_strs",
419  }
420 
421  bool parseSectionDirectiveTData(StringRef, SMLoc) {
422  return parseSectionSwitch("__DATA", "__thread_data",
424  }
425 
426  bool parseSectionDirectiveText(StringRef, SMLoc) {
427  return parseSectionSwitch("__TEXT", "__text",
429  }
430 
431  bool parseSectionDirectiveTLV(StringRef, SMLoc) {
432  return parseSectionSwitch("__DATA", "__thread_vars",
434  }
435 
436  bool parseSectionDirectiveIdent(StringRef, SMLoc) {
437  // Darwin silently ignores the .ident directive.
438  getParser().eatToEndOfStatement();
439  return false;
440  }
441 
442  bool parseSectionDirectiveThreadInitFunc(StringRef, SMLoc) {
443  return parseSectionSwitch("__DATA", "__thread_init",
445  }
446 
447  bool parseWatchOSVersionMin(StringRef Directive, SMLoc Loc) {
448  return parseVersionMin(Directive, Loc, MCVM_WatchOSVersionMin);
449  }
450  bool parseTvOSVersionMin(StringRef Directive, SMLoc Loc) {
451  return parseVersionMin(Directive, Loc, MCVM_TvOSVersionMin);
452  }
453  bool parseIOSVersionMin(StringRef Directive, SMLoc Loc) {
454  return parseVersionMin(Directive, Loc, MCVM_IOSVersionMin);
455  }
456  bool parseMacOSXVersionMin(StringRef Directive, SMLoc Loc) {
457  return parseVersionMin(Directive, Loc, MCVM_OSXVersionMin);
458  }
459 
460  bool parseBuildVersion(StringRef Directive, SMLoc Loc);
461  bool parseVersionMin(StringRef Directive, SMLoc Loc, MCVersionMinType Type);
462  bool parseMajorMinorVersionComponent(unsigned *Major, unsigned *Minor,
463  const char *VersionName);
464  bool parseOptionalTrailingVersionComponent(unsigned *Component,
465  const char *ComponentName);
466  bool parseVersion(unsigned *Major, unsigned *Minor, unsigned *Update);
467  bool parseSDKVersion(VersionTuple &SDKVersion);
468  void checkVersion(StringRef Directive, StringRef Arg, SMLoc Loc,
469  Triple::OSType ExpectedOS);
470 };
471 
472 } // end anonymous namespace
473 
474 bool DarwinAsmParser::parseSectionSwitch(StringRef Segment, StringRef Section,
475  unsigned TAA, unsigned Align,
476  unsigned StubSize) {
477  if (getLexer().isNot(AsmToken::EndOfStatement))
478  return TokError("unexpected token in section switching directive");
479  Lex();
480 
481  // FIXME: Arch specific.
482  bool isText = TAA & MachO::S_ATTR_PURE_INSTRUCTIONS;
483  getStreamer().SwitchSection(getContext().getMachOSection(
484  Segment, Section, TAA, StubSize,
486 
487  // Set the implicit alignment, if any.
488  //
489  // FIXME: This isn't really what 'as' does; I think it just uses the implicit
490  // alignment on the section (e.g., if one manually inserts bytes into the
491  // section, then just issuing the section switch directive will not realign
492  // the section. However, this is arguably more reasonable behavior, and there
493  // is no good reason for someone to intentionally emit incorrectly sized
494  // values into the implicitly aligned sections.
495  if (Align)
496  getStreamer().EmitValueToAlignment(Align);
497 
498  return false;
499 }
500 
501 /// parseDirectiveAltEntry
502 /// ::= .alt_entry identifier
503 bool DarwinAsmParser::parseDirectiveAltEntry(StringRef, SMLoc) {
504  StringRef Name;
505  if (getParser().parseIdentifier(Name))
506  return TokError("expected identifier in directive");
507 
508  // Look up symbol.
509  MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
510 
511  if (Sym->isDefined())
512  return TokError(".alt_entry must preceed symbol definition");
513 
514  if (!getStreamer().EmitSymbolAttribute(Sym, MCSA_AltEntry))
515  return TokError("unable to emit symbol attribute");
516 
517  Lex();
518  return false;
519 }
520 
521 /// parseDirectiveDesc
522 /// ::= .desc identifier , expression
523 bool DarwinAsmParser::parseDirectiveDesc(StringRef, SMLoc) {
524  StringRef Name;
525  if (getParser().parseIdentifier(Name))
526  return TokError("expected identifier in directive");
527 
528  // Handle the identifier as the key symbol.
529  MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
530 
531  if (getLexer().isNot(AsmToken::Comma))
532  return TokError("unexpected token in '.desc' directive");
533  Lex();
534 
535  int64_t DescValue;
536  if (getParser().parseAbsoluteExpression(DescValue))
537  return true;
538 
539  if (getLexer().isNot(AsmToken::EndOfStatement))
540  return TokError("unexpected token in '.desc' directive");
541 
542  Lex();
543 
544  // Set the n_desc field of this Symbol to this DescValue
545  getStreamer().EmitSymbolDesc(Sym, DescValue);
546 
547  return false;
548 }
549 
550 /// parseDirectiveIndirectSymbol
551 /// ::= .indirect_symbol identifier
552 bool DarwinAsmParser::parseDirectiveIndirectSymbol(StringRef, SMLoc Loc) {
553  const MCSectionMachO *Current = static_cast<const MCSectionMachO *>(
554  getStreamer().getCurrentSectionOnly());
556  if (SectionType != MachO::S_NON_LAZY_SYMBOL_POINTERS &&
557  SectionType != MachO::S_LAZY_SYMBOL_POINTERS &&
559  SectionType != MachO::S_SYMBOL_STUBS)
560  return Error(Loc, "indirect symbol not in a symbol pointer or stub "
561  "section");
562 
563  StringRef Name;
564  if (getParser().parseIdentifier(Name))
565  return TokError("expected identifier in .indirect_symbol directive");
566 
567  MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
568 
569  // Assembler local symbols don't make any sense here. Complain loudly.
570  if (Sym->isTemporary())
571  return TokError("non-local symbol required in directive");
572 
573  if (!getStreamer().EmitSymbolAttribute(Sym, MCSA_IndirectSymbol))
574  return TokError("unable to emit indirect symbol attribute for: " + Name);
575 
576  if (getLexer().isNot(AsmToken::EndOfStatement))
577  return TokError("unexpected token in '.indirect_symbol' directive");
578 
579  Lex();
580 
581  return false;
582 }
583 
584 /// parseDirectiveDumpOrLoad
585 /// ::= ( .dump | .load ) "filename"
586 bool DarwinAsmParser::parseDirectiveDumpOrLoad(StringRef Directive,
587  SMLoc IDLoc) {
588  bool IsDump = Directive == ".dump";
589  if (getLexer().isNot(AsmToken::String))
590  return TokError("expected string in '.dump' or '.load' directive");
591 
592  Lex();
593 
594  if (getLexer().isNot(AsmToken::EndOfStatement))
595  return TokError("unexpected token in '.dump' or '.load' directive");
596 
597  Lex();
598 
599  // FIXME: If/when .dump and .load are implemented they will be done in the
600  // the assembly parser and not have any need for an MCStreamer API.
601  if (IsDump)
602  return Warning(IDLoc, "ignoring directive .dump for now");
603  else
604  return Warning(IDLoc, "ignoring directive .load for now");
605 }
606 
607 /// ParseDirectiveLinkerOption
608 /// ::= .linker_option "string" ( , "string" )*
609 bool DarwinAsmParser::parseDirectiveLinkerOption(StringRef IDVal, SMLoc) {
611  while (true) {
612  if (getLexer().isNot(AsmToken::String))
613  return TokError("expected string in '" + Twine(IDVal) + "' directive");
614 
615  std::string Data;
616  if (getParser().parseEscapedString(Data))
617  return true;
618 
619  Args.push_back(Data);
620 
621  if (getLexer().is(AsmToken::EndOfStatement))
622  break;
623 
624  if (getLexer().isNot(AsmToken::Comma))
625  return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
626  Lex();
627  }
628 
629  getStreamer().EmitLinkerOptions(Args);
630  return false;
631 }
632 
633 /// parseDirectiveLsym
634 /// ::= .lsym identifier , expression
635 bool DarwinAsmParser::parseDirectiveLsym(StringRef, SMLoc) {
636  StringRef Name;
637  if (getParser().parseIdentifier(Name))
638  return TokError("expected identifier in directive");
639 
640  // Handle the identifier as the key symbol.
641  MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
642 
643  if (getLexer().isNot(AsmToken::Comma))
644  return TokError("unexpected token in '.lsym' directive");
645  Lex();
646 
647  const MCExpr *Value;
648  if (getParser().parseExpression(Value))
649  return true;
650 
651  if (getLexer().isNot(AsmToken::EndOfStatement))
652  return TokError("unexpected token in '.lsym' directive");
653 
654  Lex();
655 
656  // We don't currently support this directive.
657  //
658  // FIXME: Diagnostic location!
659  (void) Sym;
660  return TokError("directive '.lsym' is unsupported");
661 }
662 
663 /// parseDirectiveSection:
664 /// ::= .section identifier (',' identifier)*
665 bool DarwinAsmParser::parseDirectiveSection(StringRef, SMLoc) {
666  SMLoc Loc = getLexer().getLoc();
667 
669  if (getParser().parseIdentifier(SectionName))
670  return Error(Loc, "expected identifier after '.section' directive");
671 
672  // Verify there is a following comma.
673  if (!getLexer().is(AsmToken::Comma))
674  return TokError("unexpected token in '.section' directive");
675 
676  std::string SectionSpec = SectionName;
677  SectionSpec += ",";
678 
679  // Add all the tokens until the end of the line, ParseSectionSpecifier will
680  // handle this.
681  StringRef EOL = getLexer().LexUntilEndOfStatement();
682  SectionSpec.append(EOL.begin(), EOL.end());
683 
684  Lex();
685  if (getLexer().isNot(AsmToken::EndOfStatement))
686  return TokError("unexpected token in '.section' directive");
687  Lex();
688 
689  StringRef Segment, Section;
690  unsigned StubSize;
691  unsigned TAA;
692  bool TAAParsed;
693  std::string ErrorStr =
694  MCSectionMachO::ParseSectionSpecifier(SectionSpec, Segment, Section,
695  TAA, TAAParsed, StubSize);
696 
697  if (!ErrorStr.empty())
698  return Error(Loc, ErrorStr);
699 
700  // Issue a warning if the target is not powerpc and Section is a *coal* section.
701  Triple TT = getParser().getContext().getObjectFileInfo()->getTargetTriple();
702  Triple::ArchType ArchTy = TT.getArch();
703 
704  if (ArchTy != Triple::ppc && ArchTy != Triple::ppc64) {
705  StringRef NonCoalSection = StringSwitch<StringRef>(Section)
706  .Case("__textcoal_nt", "__text")
707  .Case("__const_coal", "__const")
708  .Case("__datacoal_nt", "__data")
709  .Default(Section);
710 
711  if (!Section.equals(NonCoalSection)) {
712  StringRef SectionVal(Loc.getPointer());
713  size_t B = SectionVal.find(',') + 1, E = SectionVal.find(',', B);
714  SMLoc BLoc = SMLoc::getFromPointer(SectionVal.data() + B);
715  SMLoc ELoc = SMLoc::getFromPointer(SectionVal.data() + E);
716  getParser().Warning(Loc, "section \"" + Section + "\" is deprecated",
717  SMRange(BLoc, ELoc));
718  getParser().Note(Loc, "change section name to \"" + NonCoalSection +
719  "\"", SMRange(BLoc, ELoc));
720  }
721  }
722 
723  // FIXME: Arch specific.
724  bool isText = Segment == "__TEXT"; // FIXME: Hack.
725  getStreamer().SwitchSection(getContext().getMachOSection(
726  Segment, Section, TAA, StubSize,
728  return false;
729 }
730 
731 /// ParseDirectivePushSection:
732 /// ::= .pushsection identifier (',' identifier)*
733 bool DarwinAsmParser::parseDirectivePushSection(StringRef S, SMLoc Loc) {
734  getStreamer().PushSection();
735 
736  if (parseDirectiveSection(S, Loc)) {
737  getStreamer().PopSection();
738  return true;
739  }
740 
741  return false;
742 }
743 
744 /// ParseDirectivePopSection:
745 /// ::= .popsection
746 bool DarwinAsmParser::parseDirectivePopSection(StringRef, SMLoc) {
747  if (!getStreamer().PopSection())
748  return TokError(".popsection without corresponding .pushsection");
749  return false;
750 }
751 
752 /// ParseDirectivePrevious:
753 /// ::= .previous
754 bool DarwinAsmParser::parseDirectivePrevious(StringRef DirName, SMLoc) {
755  MCSectionSubPair PreviousSection = getStreamer().getPreviousSection();
756  if (!PreviousSection.first)
757  return TokError(".previous without corresponding .section");
758  getStreamer().SwitchSection(PreviousSection.first, PreviousSection.second);
759  return false;
760 }
761 
762 /// ParseDirectiveSecureLogUnique
763 /// ::= .secure_log_unique ... message ...
764 bool DarwinAsmParser::parseDirectiveSecureLogUnique(StringRef, SMLoc IDLoc) {
765  StringRef LogMessage = getParser().parseStringToEndOfStatement();
766  if (getLexer().isNot(AsmToken::EndOfStatement))
767  return TokError("unexpected token in '.secure_log_unique' directive");
768 
769  if (getContext().getSecureLogUsed())
770  return Error(IDLoc, ".secure_log_unique specified multiple times");
771 
772  // Get the secure log path.
773  const char *SecureLogFile = getContext().getSecureLogFile();
774  if (!SecureLogFile)
775  return Error(IDLoc, ".secure_log_unique used but AS_SECURE_LOG_FILE "
776  "environment variable unset.");
777 
778  // Open the secure log file if we haven't already.
779  raw_fd_ostream *OS = getContext().getSecureLog();
780  if (!OS) {
781  std::error_code EC;
782  auto NewOS = llvm::make_unique<raw_fd_ostream>(
783  StringRef(SecureLogFile), EC, sys::fs::F_Append | sys::fs::F_Text);
784  if (EC)
785  return Error(IDLoc, Twine("can't open secure log file: ") +
786  SecureLogFile + " (" + EC.message() + ")");
787  OS = NewOS.get();
788  getContext().setSecureLog(std::move(NewOS));
789  }
790 
791  // Write the message.
792  unsigned CurBuf = getSourceManager().FindBufferContainingLoc(IDLoc);
793  *OS << getSourceManager().getBufferInfo(CurBuf).Buffer->getBufferIdentifier()
794  << ":" << getSourceManager().FindLineNumber(IDLoc, CurBuf) << ":"
795  << LogMessage + "\n";
796 
797  getContext().setSecureLogUsed(true);
798 
799  return false;
800 }
801 
802 /// ParseDirectiveSecureLogReset
803 /// ::= .secure_log_reset
804 bool DarwinAsmParser::parseDirectiveSecureLogReset(StringRef, SMLoc IDLoc) {
805  if (getLexer().isNot(AsmToken::EndOfStatement))
806  return TokError("unexpected token in '.secure_log_reset' directive");
807 
808  Lex();
809 
810  getContext().setSecureLogUsed(false);
811 
812  return false;
813 }
814 
815 /// parseDirectiveSubsectionsViaSymbols
816 /// ::= .subsections_via_symbols
817 bool DarwinAsmParser::parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc) {
818  if (getLexer().isNot(AsmToken::EndOfStatement))
819  return TokError("unexpected token in '.subsections_via_symbols' directive");
820 
821  Lex();
822 
823  getStreamer().EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
824 
825  return false;
826 }
827 
828 /// ParseDirectiveTBSS
829 /// ::= .tbss identifier, size, align
830 bool DarwinAsmParser::parseDirectiveTBSS(StringRef, SMLoc) {
831  SMLoc IDLoc = getLexer().getLoc();
832  StringRef Name;
833  if (getParser().parseIdentifier(Name))
834  return TokError("expected identifier in directive");
835 
836  // Handle the identifier as the key symbol.
837  MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
838 
839  if (getLexer().isNot(AsmToken::Comma))
840  return TokError("unexpected token in directive");
841  Lex();
842 
843  int64_t Size;
844  SMLoc SizeLoc = getLexer().getLoc();
845  if (getParser().parseAbsoluteExpression(Size))
846  return true;
847 
848  int64_t Pow2Alignment = 0;
849  SMLoc Pow2AlignmentLoc;
850  if (getLexer().is(AsmToken::Comma)) {
851  Lex();
852  Pow2AlignmentLoc = getLexer().getLoc();
853  if (getParser().parseAbsoluteExpression(Pow2Alignment))
854  return true;
855  }
856 
857  if (getLexer().isNot(AsmToken::EndOfStatement))
858  return TokError("unexpected token in '.tbss' directive");
859 
860  Lex();
861 
862  if (Size < 0)
863  return Error(SizeLoc, "invalid '.tbss' directive size, can't be less than"
864  "zero");
865 
866  // FIXME: Diagnose overflow.
867  if (Pow2Alignment < 0)
868  return Error(Pow2AlignmentLoc, "invalid '.tbss' alignment, can't be less"
869  "than zero");
870 
871  if (!Sym->isUndefined())
872  return Error(IDLoc, "invalid symbol redefinition");
873 
874  getStreamer().EmitTBSSSymbol(getContext().getMachOSection(
875  "__DATA", "__thread_bss",
878  Sym, Size, 1 << Pow2Alignment);
879 
880  return false;
881 }
882 
883 /// ParseDirectiveZerofill
884 /// ::= .zerofill segname , sectname [, identifier , size_expression [
885 /// , align_expression ]]
886 bool DarwinAsmParser::parseDirectiveZerofill(StringRef, SMLoc) {
887  StringRef Segment;
888  if (getParser().parseIdentifier(Segment))
889  return TokError("expected segment name after '.zerofill' directive");
890 
891  if (getLexer().isNot(AsmToken::Comma))
892  return TokError("unexpected token in directive");
893  Lex();
894 
896  SMLoc SectionLoc = getLexer().getLoc();
897  if (getParser().parseIdentifier(Section))
898  return TokError("expected section name after comma in '.zerofill' "
899  "directive");
900 
901  // If this is the end of the line all that was wanted was to create the
902  // the section but with no symbol.
903  if (getLexer().is(AsmToken::EndOfStatement)) {
904  // Create the zerofill section but no symbol
905  getStreamer().EmitZerofill(
906  getContext().getMachOSection(Segment, Section, MachO::S_ZEROFILL, 0,
908  /*Symbol=*/nullptr, /*Size=*/0, /*ByteAlignment=*/0, SectionLoc);
909  return false;
910  }
911 
912  if (getLexer().isNot(AsmToken::Comma))
913  return TokError("unexpected token in directive");
914  Lex();
915 
916  SMLoc IDLoc = getLexer().getLoc();
917  StringRef IDStr;
918  if (getParser().parseIdentifier(IDStr))
919  return TokError("expected identifier in directive");
920 
921  // handle the identifier as the key symbol.
922  MCSymbol *Sym = getContext().getOrCreateSymbol(IDStr);
923 
924  if (getLexer().isNot(AsmToken::Comma))
925  return TokError("unexpected token in directive");
926  Lex();
927 
928  int64_t Size;
929  SMLoc SizeLoc = getLexer().getLoc();
930  if (getParser().parseAbsoluteExpression(Size))
931  return true;
932 
933  int64_t Pow2Alignment = 0;
934  SMLoc Pow2AlignmentLoc;
935  if (getLexer().is(AsmToken::Comma)) {
936  Lex();
937  Pow2AlignmentLoc = getLexer().getLoc();
938  if (getParser().parseAbsoluteExpression(Pow2Alignment))
939  return true;
940  }
941 
942  if (getLexer().isNot(AsmToken::EndOfStatement))
943  return TokError("unexpected token in '.zerofill' directive");
944 
945  Lex();
946 
947  if (Size < 0)
948  return Error(SizeLoc, "invalid '.zerofill' directive size, can't be less "
949  "than zero");
950 
951  // NOTE: The alignment in the directive is a power of 2 value, the assembler
952  // may internally end up wanting an alignment in bytes.
953  // FIXME: Diagnose overflow.
954  if (Pow2Alignment < 0)
955  return Error(Pow2AlignmentLoc, "invalid '.zerofill' directive alignment, "
956  "can't be less than zero");
957 
958  if (!Sym->isUndefined())
959  return Error(IDLoc, "invalid symbol redefinition");
960 
961  // Create the zerofill Symbol with Size and Pow2Alignment
962  //
963  // FIXME: Arch specific.
964  getStreamer().EmitZerofill(getContext().getMachOSection(
965  Segment, Section, MachO::S_ZEROFILL,
966  0, SectionKind::getBSS()),
967  Sym, Size, 1 << Pow2Alignment, SectionLoc);
968 
969  return false;
970 }
971 
972 /// ParseDirectiveDataRegion
973 /// ::= .data_region [ ( jt8 | jt16 | jt32 ) ]
974 bool DarwinAsmParser::parseDirectiveDataRegion(StringRef, SMLoc) {
975  if (getLexer().is(AsmToken::EndOfStatement)) {
976  Lex();
977  getStreamer().EmitDataRegion(MCDR_DataRegion);
978  return false;
979  }
980  StringRef RegionType;
981  SMLoc Loc = getParser().getTok().getLoc();
982  if (getParser().parseIdentifier(RegionType))
983  return TokError("expected region type after '.data_region' directive");
984  int Kind = StringSwitch<int>(RegionType)
985  .Case("jt8", MCDR_DataRegionJT8)
986  .Case("jt16", MCDR_DataRegionJT16)
987  .Case("jt32", MCDR_DataRegionJT32)
988  .Default(-1);
989  if (Kind == -1)
990  return Error(Loc, "unknown region type in '.data_region' directive");
991  Lex();
992 
993  getStreamer().EmitDataRegion((MCDataRegionType)Kind);
994  return false;
995 }
996 
997 /// ParseDirectiveDataRegionEnd
998 /// ::= .end_data_region
999 bool DarwinAsmParser::parseDirectiveDataRegionEnd(StringRef, SMLoc) {
1000  if (getLexer().isNot(AsmToken::EndOfStatement))
1001  return TokError("unexpected token in '.end_data_region' directive");
1002 
1003  Lex();
1004  getStreamer().EmitDataRegion(MCDR_DataRegionEnd);
1005  return false;
1006 }
1007 
1008 static bool isSDKVersionToken(const AsmToken &Tok) {
1009  return Tok.is(AsmToken::Identifier) && Tok.getIdentifier() == "sdk_version";
1010 }
1011 
1012 /// parseMajorMinorVersionComponent ::= major, minor
1013 bool DarwinAsmParser::parseMajorMinorVersionComponent(unsigned *Major,
1014  unsigned *Minor,
1015  const char *VersionName) {
1016  // Get the major version number.
1017  if (getLexer().isNot(AsmToken::Integer))
1018  return TokError(Twine("invalid ") + VersionName +
1019  " major version number, integer expected");
1020  int64_t MajorVal = getLexer().getTok().getIntVal();
1021  if (MajorVal > 65535 || MajorVal <= 0)
1022  return TokError(Twine("invalid ") + VersionName + " major version number");
1023  *Major = (unsigned)MajorVal;
1024  Lex();
1025  if (getLexer().isNot(AsmToken::Comma))
1026  return TokError(Twine(VersionName) +
1027  " minor version number required, comma expected");
1028  Lex();
1029  // Get the minor version number.
1030  if (getLexer().isNot(AsmToken::Integer))
1031  return TokError(Twine("invalid ") + VersionName +
1032  " minor version number, integer expected");
1033  int64_t MinorVal = getLexer().getTok().getIntVal();
1034  if (MinorVal > 255 || MinorVal < 0)
1035  return TokError(Twine("invalid ") + VersionName + " minor version number");
1036  *Minor = MinorVal;
1037  Lex();
1038  return false;
1039 }
1040 
1041 /// parseOptionalTrailingVersionComponent ::= , version_number
1042 bool DarwinAsmParser::parseOptionalTrailingVersionComponent(
1043  unsigned *Component, const char *ComponentName) {
1044  assert(getLexer().is(AsmToken::Comma) && "comma expected");
1045  Lex();
1046  if (getLexer().isNot(AsmToken::Integer))
1047  return TokError(Twine("invalid ") + ComponentName +
1048  " version number, integer expected");
1049  int64_t Val = getLexer().getTok().getIntVal();
1050  if (Val > 255 || Val < 0)
1051  return TokError(Twine("invalid ") + ComponentName + " version number");
1052  *Component = Val;
1053  Lex();
1054  return false;
1055 }
1056 
1057 /// parseVersion ::= parseMajorMinorVersionComponent
1058 /// parseOptionalTrailingVersionComponent
1059 bool DarwinAsmParser::parseVersion(unsigned *Major, unsigned *Minor,
1060  unsigned *Update) {
1061  if (parseMajorMinorVersionComponent(Major, Minor, "OS"))
1062  return true;
1063 
1064  // Get the update level, if specified
1065  *Update = 0;
1066  if (getLexer().is(AsmToken::EndOfStatement) ||
1067  isSDKVersionToken(getLexer().getTok()))
1068  return false;
1069  if (getLexer().isNot(AsmToken::Comma))
1070  return TokError("invalid OS update specifier, comma expected");
1071  if (parseOptionalTrailingVersionComponent(Update, "OS update"))
1072  return true;
1073  return false;
1074 }
1075 
1076 bool DarwinAsmParser::parseSDKVersion(VersionTuple &SDKVersion) {
1077  assert(isSDKVersionToken(getLexer().getTok()) && "expected sdk_version");
1078  Lex();
1079  unsigned Major, Minor;
1080  if (parseMajorMinorVersionComponent(&Major, &Minor, "SDK"))
1081  return true;
1082  SDKVersion = VersionTuple(Major, Minor);
1083 
1084  // Get the subminor version, if specified.
1085  if (getLexer().is(AsmToken::Comma)) {
1086  unsigned Subminor;
1087  if (parseOptionalTrailingVersionComponent(&Subminor, "SDK subminor"))
1088  return true;
1089  SDKVersion = VersionTuple(Major, Minor, Subminor);
1090  }
1091  return false;
1092 }
1093 
1094 void DarwinAsmParser::checkVersion(StringRef Directive, StringRef Arg,
1095  SMLoc Loc, Triple::OSType ExpectedOS) {
1096  const Triple &Target = getContext().getObjectFileInfo()->getTargetTriple();
1097  if (Target.getOS() != ExpectedOS)
1098  Warning(Loc, Twine(Directive) +
1099  (Arg.empty() ? Twine() : Twine(' ') + Arg) +
1100  " used while targeting " + Target.getOSName());
1101 
1102  if (LastVersionDirective.isValid()) {
1103  Warning(Loc, "overriding previous version directive");
1104  Note(LastVersionDirective, "previous definition is here");
1105  }
1106  LastVersionDirective = Loc;
1107 }
1108 
1110  switch (Type) {
1112  case MCVM_TvOSVersionMin: return Triple::TvOS;
1113  case MCVM_IOSVersionMin: return Triple::IOS;
1114  case MCVM_OSXVersionMin: return Triple::MacOSX;
1115  }
1116  llvm_unreachable("Invalid mc version min type");
1117 }
1118 
1119 /// parseVersionMin
1120 /// ::= .ios_version_min parseVersion parseSDKVersion
1121 /// | .macosx_version_min parseVersion parseSDKVersion
1122 /// | .tvos_version_min parseVersion parseSDKVersion
1123 /// | .watchos_version_min parseVersion parseSDKVersion
1124 bool DarwinAsmParser::parseVersionMin(StringRef Directive, SMLoc Loc,
1126  unsigned Major;
1127  unsigned Minor;
1128  unsigned Update;
1129  if (parseVersion(&Major, &Minor, &Update))
1130  return true;
1131 
1132  VersionTuple SDKVersion;
1133  if (isSDKVersionToken(getLexer().getTok()) && parseSDKVersion(SDKVersion))
1134  return true;
1135 
1136  if (parseToken(AsmToken::EndOfStatement))
1137  return addErrorSuffix(Twine(" in '") + Directive + "' directive");
1138 
1139  Triple::OSType ExpectedOS = getOSTypeFromMCVM(Type);
1140  checkVersion(Directive, StringRef(), Loc, ExpectedOS);
1141  getStreamer().EmitVersionMin(Type, Major, Minor, Update, SDKVersion);
1142  return false;
1143 }
1144 
1146  switch (Type) {
1148  case MachO::PLATFORM_IOS: return Triple::IOS;
1149  case MachO::PLATFORM_TVOS: return Triple::TvOS;
1151  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  .Default(0);
1173  if (Platform == 0)
1174  return Error(PlatformLoc, "unknown platform name");
1175 
1176  if (getLexer().isNot(AsmToken::Comma))
1177  return TokError("version number required, comma expected");
1178  Lex();
1179 
1180  unsigned Major;
1181  unsigned Minor;
1182  unsigned Update;
1183  if (parseVersion(&Major, &Minor, &Update))
1184  return true;
1185 
1186  VersionTuple SDKVersion;
1187  if (isSDKVersionToken(getLexer().getTok()) && parseSDKVersion(SDKVersion))
1188  return true;
1189 
1190  if (parseToken(AsmToken::EndOfStatement))
1191  return addErrorSuffix(" in '.build_version' directive");
1192 
1193  Triple::OSType ExpectedOS
1195  checkVersion(Directive, PlatformName, Loc, ExpectedOS);
1196  getStreamer().EmitBuildVersion(Platform, Major, Minor, Update, SDKVersion);
1197  return false;
1198 }
1199 
1200 
1201 namespace llvm {
1202 
1204  return new DarwinAsmParser;
1205 }
1206 
1207 } // end llvm namespace
Represents a range in source code.
Definition: SMLoc.h:49
constexpr char Align[]
Key for Kernel::Arg::Metadata::mAlign.
static SectionKind getData()
Definition: SectionKind.h:202
S_NON_LAZY_SYMBOL_POINTERS - Section with non-lazy symbol pointers.
Definition: MachO.h:132
S_SYMBOL_STUBS - Section with symbol stubs, byte size of stub in the Reserved2 field.
Definition: MachO.h:137
This represents a section on a Mach-O system (used by Mac OS X).
This class represents lattice values for constants.
Definition: AllocatorList.h:24
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:42
Generic assembler parser interface, for use by target specific assembly parsers.
Definition: MCAsmParser.h:110
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:299
.watchos_version_min
Definition: MCDirectives.h:68
void push_back(const T &Elt)
Definition: SmallVector.h:218
.ios_version_min
Definition: MCDirectives.h:65
MCAsmParserExtension * createDarwinAsmParser()
S_THREAD_LOCAL_VARIABLES - Section with thread local variable structure data.
Definition: MachO.h:165
.macosx_version_min
Definition: MCDirectives.h:66
MCDataRegionType
Definition: MCDirectives.h:56
S_ATTR_NO_DEAD_STRIP - No dead stripping.
Definition: MachO.h:190
StringRef getIdentifier() const
Get the identifier string for the current token, which should be an identifier or a string...
Definition: MCAsmMacro.h:100
amdgpu Simplify well known AMD library false Value Value const Twine & Name
S_4BYTE_LITERALS - Section with 4 byte literals.
Definition: MachO.h:126
static SectionKind getBSS()
Definition: SectionKind.h:198
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:81
Base class for the full range of assembler expressions which are needed for parsing.
Definition: MCExpr.h:36
S_8BYTE_LITERALS - Section with 8 byte literals.
Definition: MachO.h:128
Target independent representation for an assembler token.
Definition: MCAsmMacro.h:22
.data_region jt16
Definition: MCDirectives.h:59
static bool isSDKVersionToken(const AsmToken &Tok)
LLVM_NODISCARD LLVM_ATTRIBUTE_ALWAYS_INLINE R Default(T Value)
Definition: StringSwitch.h:203
S_MOD_TERM_FUNC_POINTERS - Section with only function pointers for termination.
Definition: MachO.h:143
PlatformType
Definition: MachO.h:484
ArchType getArch() const
getArch - Get the parsed architecture type of this triple.
Definition: Triple.h:290
S_ATTR_PURE_INSTRUCTIONS - Section contains only true machine instructions.
Definition: MachO.h:182
.alt_entry (MachO)
Definition: MCDirectives.h:38
LLVM_NODISCARD LLVM_ATTRIBUTE_ALWAYS_INLINE bool empty() const
empty - Check if the string is empty.
Definition: StringRef.h:133
.data_region jt32
Definition: MCDirectives.h:60
const char * getPointer() const
Definition: SMLoc.h:35
A switch()-like statement whose cases are string literals.
Definition: StringSwitch.h:43
S_LITERAL_POINTERS - Section with pointers to literals.
Definition: MachO.h:130
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:67
static GCRegistry::Add< CoreCLRGC > E("coreclr", "CoreCLR-compatible GC")
S_THREAD_LOCAL_ZEROFILL - Thread local zerofill section.
Definition: MachO.h:162
bool isTemporary() const
isTemporary - Check if this is an assembler temporary symbol.
Definition: MCSymbol.h:220
static Triple::OSType getOSTypeFromPlatform(MachO::PlatformType Type)
.subsections_via_symbols (MachO)
Definition: MCDirectives.h:50
S_THREAD_LOCAL_REGULAR - Thread local data section.
Definition: MachO.h:160
S_CSTRING_LITERALS - Section with literal C strings.
Definition: MachO.h:124
MachO::SectionType getType() const
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:44
S_LAZY_SYMBOL_POINTERS - Section with lazy symbol pointers.
Definition: MachO.h:134
static SectionKind getThreadBSS()
Definition: SectionKind.h:196
std::pair< MCSection *, const MCExpr * > MCSectionSubPair
Definition: MCStreamer.h:57
bool isUndefined(bool SetUsed=true) const
isUndefined - Check if this symbol undefined (i.e., implicitly defined).
Definition: MCSymbol.h:257
.indirect_symbol (MachO)
Definition: MCDirectives.h:32
StringRef getOSName() const
getOSName - Get the operating system (third) component of the triple.
Definition: Triple.cpp:976
S_THREAD_LOCAL_VARIABLE_POINTERS - Section with pointers to thread local structures.
Definition: MachO.h:168
S_THREAD_LOCAL_INIT_FUNCTION_POINTERS - Section with thread local variable initialization pointers to...
Definition: MachO.h:171
S_16BYTE_LITERALS - Section with only 16 byte literals.
Definition: MachO.h:153
bool is(TokenKind K) const
Definition: MCAsmMacro.h:83
bool isDefined() const
isDefined - Check if this symbol is defined (i.e., it has an address).
Definition: MCSymbol.h:248
Target - Wrapper for Target specific information.
LLVM_ATTRIBUTE_ALWAYS_INLINE StringSwitch & Case(StringLiteral S, T Value)
Definition: StringSwitch.h:70
LLVM_NODISCARD LLVM_ATTRIBUTE_ALWAYS_INLINE bool equals(StringRef RHS) const
equals - Check for string equality, this is more efficient than compare() when the relative ordering ...
Definition: StringRef.h:169
iterator begin() const
Definition: StringRef.h:106
static SMLoc getFromPointer(const char *Ptr)
Definition: SMLoc.h:37
amdgpu Simplify well known AMD library false Value Value * Arg
Represents a version number in the form major[.minor[.subminor[.build]]].
Definition: VersionTuple.h:27
A raw_ostream that writes to a file descriptor.
Definition: raw_ostream.h:366
uint32_t Size
Definition: Profile.cpp:47
static Version parseVersion(StringRef Name)
const unsigned Kind
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
.data_region jt8
Definition: MCDirectives.h:58
Generic interface for extending the MCAsmParser, which is implemented by target and object file assem...
MCVersionMinType
Definition: MCDirectives.h:64
LLVM Value Representation.
Definition: Value.h:73
static Triple::OSType getOSTypeFromMCVM(MCVersionMinType Type)
std::pair< MCAsmParserExtension *, DirectiveHandler > ExtensionDirectiveHandler
Definition: MCAsmParser.h:114
const char SectionName[]
Definition: AMDGPUPTNote.h:24
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:49
S_ZEROFILL - Zero fill on demand section.
Definition: MachO.h:122
Represents a location in source code.
Definition: SMLoc.h:24
S_MOD_INIT_FUNC_POINTERS - Section with only function pointers for initialization.
Definition: MachO.h:140
SectionType
These are the section type and attributes fields.
Definition: MachO.h:115
iterator end() const
Definition: StringRef.h:108
constexpr char Args[]
Key for Kernel::Metadata::mArgs.
.end_data_region
Definition: MCDirectives.h:61
static SectionKind getText()
Definition: SectionKind.h:180