LLVM  7.0.0svn
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 /// \brief 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 parseVersion(unsigned *Major, unsigned *Minor, unsigned *Update);
463  void checkVersion(StringRef Directive, StringRef Arg, SMLoc Loc,
464  Triple::OSType ExpectedOS);
465 };
466 
467 } // end anonymous namespace
468 
469 bool DarwinAsmParser::parseSectionSwitch(StringRef Segment, StringRef Section,
470  unsigned TAA, unsigned Align,
471  unsigned StubSize) {
472  if (getLexer().isNot(AsmToken::EndOfStatement))
473  return TokError("unexpected token in section switching directive");
474  Lex();
475 
476  // FIXME: Arch specific.
477  bool isText = TAA & MachO::S_ATTR_PURE_INSTRUCTIONS;
478  getStreamer().SwitchSection(getContext().getMachOSection(
479  Segment, Section, TAA, StubSize,
481 
482  // Set the implicit alignment, if any.
483  //
484  // FIXME: This isn't really what 'as' does; I think it just uses the implicit
485  // alignment on the section (e.g., if one manually inserts bytes into the
486  // section, then just issuing the section switch directive will not realign
487  // the section. However, this is arguably more reasonable behavior, and there
488  // is no good reason for someone to intentionally emit incorrectly sized
489  // values into the implicitly aligned sections.
490  if (Align)
491  getStreamer().EmitValueToAlignment(Align);
492 
493  return false;
494 }
495 
496 /// parseDirectiveAltEntry
497 /// ::= .alt_entry identifier
498 bool DarwinAsmParser::parseDirectiveAltEntry(StringRef, SMLoc) {
499  StringRef Name;
500  if (getParser().parseIdentifier(Name))
501  return TokError("expected identifier in directive");
502 
503  // Look up symbol.
504  MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
505 
506  if (Sym->isDefined())
507  return TokError(".alt_entry must preceed symbol definition");
508 
509  if (!getStreamer().EmitSymbolAttribute(Sym, MCSA_AltEntry))
510  return TokError("unable to emit symbol attribute");
511 
512  Lex();
513  return false;
514 }
515 
516 /// parseDirectiveDesc
517 /// ::= .desc identifier , expression
518 bool DarwinAsmParser::parseDirectiveDesc(StringRef, SMLoc) {
519  StringRef Name;
520  if (getParser().parseIdentifier(Name))
521  return TokError("expected identifier in directive");
522 
523  // Handle the identifier as the key symbol.
524  MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
525 
526  if (getLexer().isNot(AsmToken::Comma))
527  return TokError("unexpected token in '.desc' directive");
528  Lex();
529 
530  int64_t DescValue;
531  if (getParser().parseAbsoluteExpression(DescValue))
532  return true;
533 
534  if (getLexer().isNot(AsmToken::EndOfStatement))
535  return TokError("unexpected token in '.desc' directive");
536 
537  Lex();
538 
539  // Set the n_desc field of this Symbol to this DescValue
540  getStreamer().EmitSymbolDesc(Sym, DescValue);
541 
542  return false;
543 }
544 
545 /// parseDirectiveIndirectSymbol
546 /// ::= .indirect_symbol identifier
547 bool DarwinAsmParser::parseDirectiveIndirectSymbol(StringRef, SMLoc Loc) {
548  const MCSectionMachO *Current = static_cast<const MCSectionMachO *>(
549  getStreamer().getCurrentSectionOnly());
551  if (SectionType != MachO::S_NON_LAZY_SYMBOL_POINTERS &&
552  SectionType != MachO::S_LAZY_SYMBOL_POINTERS &&
554  SectionType != MachO::S_SYMBOL_STUBS)
555  return Error(Loc, "indirect symbol not in a symbol pointer or stub "
556  "section");
557 
558  StringRef Name;
559  if (getParser().parseIdentifier(Name))
560  return TokError("expected identifier in .indirect_symbol directive");
561 
562  MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
563 
564  // Assembler local symbols don't make any sense here. Complain loudly.
565  if (Sym->isTemporary())
566  return TokError("non-local symbol required in directive");
567 
568  if (!getStreamer().EmitSymbolAttribute(Sym, MCSA_IndirectSymbol))
569  return TokError("unable to emit indirect symbol attribute for: " + Name);
570 
571  if (getLexer().isNot(AsmToken::EndOfStatement))
572  return TokError("unexpected token in '.indirect_symbol' directive");
573 
574  Lex();
575 
576  return false;
577 }
578 
579 /// parseDirectiveDumpOrLoad
580 /// ::= ( .dump | .load ) "filename"
581 bool DarwinAsmParser::parseDirectiveDumpOrLoad(StringRef Directive,
582  SMLoc IDLoc) {
583  bool IsDump = Directive == ".dump";
584  if (getLexer().isNot(AsmToken::String))
585  return TokError("expected string in '.dump' or '.load' directive");
586 
587  Lex();
588 
589  if (getLexer().isNot(AsmToken::EndOfStatement))
590  return TokError("unexpected token in '.dump' or '.load' directive");
591 
592  Lex();
593 
594  // FIXME: If/when .dump and .load are implemented they will be done in the
595  // the assembly parser and not have any need for an MCStreamer API.
596  if (IsDump)
597  return Warning(IDLoc, "ignoring directive .dump for now");
598  else
599  return Warning(IDLoc, "ignoring directive .load for now");
600 }
601 
602 /// ParseDirectiveLinkerOption
603 /// ::= .linker_option "string" ( , "string" )*
604 bool DarwinAsmParser::parseDirectiveLinkerOption(StringRef IDVal, SMLoc) {
606  while (true) {
607  if (getLexer().isNot(AsmToken::String))
608  return TokError("expected string in '" + Twine(IDVal) + "' directive");
609 
610  std::string Data;
611  if (getParser().parseEscapedString(Data))
612  return true;
613 
614  Args.push_back(Data);
615 
616  if (getLexer().is(AsmToken::EndOfStatement))
617  break;
618 
619  if (getLexer().isNot(AsmToken::Comma))
620  return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
621  Lex();
622  }
623 
624  getStreamer().EmitLinkerOptions(Args);
625  return false;
626 }
627 
628 /// parseDirectiveLsym
629 /// ::= .lsym identifier , expression
630 bool DarwinAsmParser::parseDirectiveLsym(StringRef, SMLoc) {
631  StringRef Name;
632  if (getParser().parseIdentifier(Name))
633  return TokError("expected identifier in directive");
634 
635  // Handle the identifier as the key symbol.
636  MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
637 
638  if (getLexer().isNot(AsmToken::Comma))
639  return TokError("unexpected token in '.lsym' directive");
640  Lex();
641 
642  const MCExpr *Value;
643  if (getParser().parseExpression(Value))
644  return true;
645 
646  if (getLexer().isNot(AsmToken::EndOfStatement))
647  return TokError("unexpected token in '.lsym' directive");
648 
649  Lex();
650 
651  // We don't currently support this directive.
652  //
653  // FIXME: Diagnostic location!
654  (void) Sym;
655  return TokError("directive '.lsym' is unsupported");
656 }
657 
658 /// parseDirectiveSection:
659 /// ::= .section identifier (',' identifier)*
660 bool DarwinAsmParser::parseDirectiveSection(StringRef, SMLoc) {
661  SMLoc Loc = getLexer().getLoc();
662 
664  if (getParser().parseIdentifier(SectionName))
665  return Error(Loc, "expected identifier after '.section' directive");
666 
667  // Verify there is a following comma.
668  if (!getLexer().is(AsmToken::Comma))
669  return TokError("unexpected token in '.section' directive");
670 
671  std::string SectionSpec = SectionName;
672  SectionSpec += ",";
673 
674  // Add all the tokens until the end of the line, ParseSectionSpecifier will
675  // handle this.
676  StringRef EOL = getLexer().LexUntilEndOfStatement();
677  SectionSpec.append(EOL.begin(), EOL.end());
678 
679  Lex();
680  if (getLexer().isNot(AsmToken::EndOfStatement))
681  return TokError("unexpected token in '.section' directive");
682  Lex();
683 
684  StringRef Segment, Section;
685  unsigned StubSize;
686  unsigned TAA;
687  bool TAAParsed;
688  std::string ErrorStr =
689  MCSectionMachO::ParseSectionSpecifier(SectionSpec, Segment, Section,
690  TAA, TAAParsed, StubSize);
691 
692  if (!ErrorStr.empty())
693  return Error(Loc, ErrorStr);
694 
695  // Issue a warning if the target is not powerpc and Section is a *coal* section.
696  Triple TT = getParser().getContext().getObjectFileInfo()->getTargetTriple();
697  Triple::ArchType ArchTy = TT.getArch();
698 
699  if (ArchTy != Triple::ppc && ArchTy != Triple::ppc64) {
700  StringRef NonCoalSection = StringSwitch<StringRef>(Section)
701  .Case("__textcoal_nt", "__text")
702  .Case("__const_coal", "__const")
703  .Case("__datacoal_nt", "__data")
704  .Default(Section);
705 
706  if (!Section.equals(NonCoalSection)) {
707  StringRef SectionVal(Loc.getPointer());
708  size_t B = SectionVal.find(',') + 1, E = SectionVal.find(',', B);
709  SMLoc BLoc = SMLoc::getFromPointer(SectionVal.data() + B);
710  SMLoc ELoc = SMLoc::getFromPointer(SectionVal.data() + E);
711  getParser().Warning(Loc, "section \"" + Section + "\" is deprecated",
712  SMRange(BLoc, ELoc));
713  getParser().Note(Loc, "change section name to \"" + NonCoalSection +
714  "\"", SMRange(BLoc, ELoc));
715  }
716  }
717 
718  // FIXME: Arch specific.
719  bool isText = Segment == "__TEXT"; // FIXME: Hack.
720  getStreamer().SwitchSection(getContext().getMachOSection(
721  Segment, Section, TAA, StubSize,
723  return false;
724 }
725 
726 /// ParseDirectivePushSection:
727 /// ::= .pushsection identifier (',' identifier)*
728 bool DarwinAsmParser::parseDirectivePushSection(StringRef S, SMLoc Loc) {
729  getStreamer().PushSection();
730 
731  if (parseDirectiveSection(S, Loc)) {
732  getStreamer().PopSection();
733  return true;
734  }
735 
736  return false;
737 }
738 
739 /// ParseDirectivePopSection:
740 /// ::= .popsection
741 bool DarwinAsmParser::parseDirectivePopSection(StringRef, SMLoc) {
742  if (!getStreamer().PopSection())
743  return TokError(".popsection without corresponding .pushsection");
744  return false;
745 }
746 
747 /// ParseDirectivePrevious:
748 /// ::= .previous
749 bool DarwinAsmParser::parseDirectivePrevious(StringRef DirName, SMLoc) {
750  MCSectionSubPair PreviousSection = getStreamer().getPreviousSection();
751  if (!PreviousSection.first)
752  return TokError(".previous without corresponding .section");
753  getStreamer().SwitchSection(PreviousSection.first, PreviousSection.second);
754  return false;
755 }
756 
757 /// ParseDirectiveSecureLogUnique
758 /// ::= .secure_log_unique ... message ...
759 bool DarwinAsmParser::parseDirectiveSecureLogUnique(StringRef, SMLoc IDLoc) {
760  StringRef LogMessage = getParser().parseStringToEndOfStatement();
761  if (getLexer().isNot(AsmToken::EndOfStatement))
762  return TokError("unexpected token in '.secure_log_unique' directive");
763 
764  if (getContext().getSecureLogUsed())
765  return Error(IDLoc, ".secure_log_unique specified multiple times");
766 
767  // Get the secure log path.
768  const char *SecureLogFile = getContext().getSecureLogFile();
769  if (!SecureLogFile)
770  return Error(IDLoc, ".secure_log_unique used but AS_SECURE_LOG_FILE "
771  "environment variable unset.");
772 
773  // Open the secure log file if we haven't already.
774  raw_fd_ostream *OS = getContext().getSecureLog();
775  if (!OS) {
776  std::error_code EC;
777  auto NewOS = llvm::make_unique<raw_fd_ostream>(
778  StringRef(SecureLogFile), EC, sys::fs::F_Append | sys::fs::F_Text);
779  if (EC)
780  return Error(IDLoc, Twine("can't open secure log file: ") +
781  SecureLogFile + " (" + EC.message() + ")");
782  OS = NewOS.get();
783  getContext().setSecureLog(std::move(NewOS));
784  }
785 
786  // Write the message.
787  unsigned CurBuf = getSourceManager().FindBufferContainingLoc(IDLoc);
788  *OS << getSourceManager().getBufferInfo(CurBuf).Buffer->getBufferIdentifier()
789  << ":" << getSourceManager().FindLineNumber(IDLoc, CurBuf) << ":"
790  << LogMessage + "\n";
791 
792  getContext().setSecureLogUsed(true);
793 
794  return false;
795 }
796 
797 /// ParseDirectiveSecureLogReset
798 /// ::= .secure_log_reset
799 bool DarwinAsmParser::parseDirectiveSecureLogReset(StringRef, SMLoc IDLoc) {
800  if (getLexer().isNot(AsmToken::EndOfStatement))
801  return TokError("unexpected token in '.secure_log_reset' directive");
802 
803  Lex();
804 
805  getContext().setSecureLogUsed(false);
806 
807  return false;
808 }
809 
810 /// parseDirectiveSubsectionsViaSymbols
811 /// ::= .subsections_via_symbols
812 bool DarwinAsmParser::parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc) {
813  if (getLexer().isNot(AsmToken::EndOfStatement))
814  return TokError("unexpected token in '.subsections_via_symbols' directive");
815 
816  Lex();
817 
818  getStreamer().EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
819 
820  return false;
821 }
822 
823 /// ParseDirectiveTBSS
824 /// ::= .tbss identifier, size, align
825 bool DarwinAsmParser::parseDirectiveTBSS(StringRef, SMLoc) {
826  SMLoc IDLoc = getLexer().getLoc();
827  StringRef Name;
828  if (getParser().parseIdentifier(Name))
829  return TokError("expected identifier in directive");
830 
831  // Handle the identifier as the key symbol.
832  MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
833 
834  if (getLexer().isNot(AsmToken::Comma))
835  return TokError("unexpected token in directive");
836  Lex();
837 
838  int64_t Size;
839  SMLoc SizeLoc = getLexer().getLoc();
840  if (getParser().parseAbsoluteExpression(Size))
841  return true;
842 
843  int64_t Pow2Alignment = 0;
844  SMLoc Pow2AlignmentLoc;
845  if (getLexer().is(AsmToken::Comma)) {
846  Lex();
847  Pow2AlignmentLoc = getLexer().getLoc();
848  if (getParser().parseAbsoluteExpression(Pow2Alignment))
849  return true;
850  }
851 
852  if (getLexer().isNot(AsmToken::EndOfStatement))
853  return TokError("unexpected token in '.tbss' directive");
854 
855  Lex();
856 
857  if (Size < 0)
858  return Error(SizeLoc, "invalid '.tbss' directive size, can't be less than"
859  "zero");
860 
861  // FIXME: Diagnose overflow.
862  if (Pow2Alignment < 0)
863  return Error(Pow2AlignmentLoc, "invalid '.tbss' alignment, can't be less"
864  "than zero");
865 
866  if (!Sym->isUndefined())
867  return Error(IDLoc, "invalid symbol redefinition");
868 
869  getStreamer().EmitTBSSSymbol(getContext().getMachOSection(
870  "__DATA", "__thread_bss",
873  Sym, Size, 1 << Pow2Alignment);
874 
875  return false;
876 }
877 
878 /// ParseDirectiveZerofill
879 /// ::= .zerofill segname , sectname [, identifier , size_expression [
880 /// , align_expression ]]
881 bool DarwinAsmParser::parseDirectiveZerofill(StringRef, SMLoc) {
882  StringRef Segment;
883  if (getParser().parseIdentifier(Segment))
884  return TokError("expected segment name after '.zerofill' directive");
885 
886  if (getLexer().isNot(AsmToken::Comma))
887  return TokError("unexpected token in directive");
888  Lex();
889 
891  if (getParser().parseIdentifier(Section))
892  return TokError("expected section name after comma in '.zerofill' "
893  "directive");
894 
895  // If this is the end of the line all that was wanted was to create the
896  // the section but with no symbol.
897  if (getLexer().is(AsmToken::EndOfStatement)) {
898  // Create the zerofill section but no symbol
899  getStreamer().EmitZerofill(getContext().getMachOSection(
900  Segment, Section, MachO::S_ZEROFILL,
901  0, SectionKind::getBSS()));
902  return false;
903  }
904 
905  if (getLexer().isNot(AsmToken::Comma))
906  return TokError("unexpected token in directive");
907  Lex();
908 
909  SMLoc IDLoc = getLexer().getLoc();
910  StringRef IDStr;
911  if (getParser().parseIdentifier(IDStr))
912  return TokError("expected identifier in directive");
913 
914  // handle the identifier as the key symbol.
915  MCSymbol *Sym = getContext().getOrCreateSymbol(IDStr);
916 
917  if (getLexer().isNot(AsmToken::Comma))
918  return TokError("unexpected token in directive");
919  Lex();
920 
921  int64_t Size;
922  SMLoc SizeLoc = getLexer().getLoc();
923  if (getParser().parseAbsoluteExpression(Size))
924  return true;
925 
926  int64_t Pow2Alignment = 0;
927  SMLoc Pow2AlignmentLoc;
928  if (getLexer().is(AsmToken::Comma)) {
929  Lex();
930  Pow2AlignmentLoc = getLexer().getLoc();
931  if (getParser().parseAbsoluteExpression(Pow2Alignment))
932  return true;
933  }
934 
935  if (getLexer().isNot(AsmToken::EndOfStatement))
936  return TokError("unexpected token in '.zerofill' directive");
937 
938  Lex();
939 
940  if (Size < 0)
941  return Error(SizeLoc, "invalid '.zerofill' directive size, can't be less "
942  "than zero");
943 
944  // NOTE: The alignment in the directive is a power of 2 value, the assembler
945  // may internally end up wanting an alignment in bytes.
946  // FIXME: Diagnose overflow.
947  if (Pow2Alignment < 0)
948  return Error(Pow2AlignmentLoc, "invalid '.zerofill' directive alignment, "
949  "can't be less than zero");
950 
951  if (!Sym->isUndefined())
952  return Error(IDLoc, "invalid symbol redefinition");
953 
954  // Create the zerofill Symbol with Size and Pow2Alignment
955  //
956  // FIXME: Arch specific.
957  getStreamer().EmitZerofill(getContext().getMachOSection(
958  Segment, Section, MachO::S_ZEROFILL,
959  0, SectionKind::getBSS()),
960  Sym, Size, 1 << Pow2Alignment);
961 
962  return false;
963 }
964 
965 /// ParseDirectiveDataRegion
966 /// ::= .data_region [ ( jt8 | jt16 | jt32 ) ]
967 bool DarwinAsmParser::parseDirectiveDataRegion(StringRef, SMLoc) {
968  if (getLexer().is(AsmToken::EndOfStatement)) {
969  Lex();
970  getStreamer().EmitDataRegion(MCDR_DataRegion);
971  return false;
972  }
973  StringRef RegionType;
974  SMLoc Loc = getParser().getTok().getLoc();
975  if (getParser().parseIdentifier(RegionType))
976  return TokError("expected region type after '.data_region' directive");
977  int Kind = StringSwitch<int>(RegionType)
978  .Case("jt8", MCDR_DataRegionJT8)
979  .Case("jt16", MCDR_DataRegionJT16)
980  .Case("jt32", MCDR_DataRegionJT32)
981  .Default(-1);
982  if (Kind == -1)
983  return Error(Loc, "unknown region type in '.data_region' directive");
984  Lex();
985 
986  getStreamer().EmitDataRegion((MCDataRegionType)Kind);
987  return false;
988 }
989 
990 /// ParseDirectiveDataRegionEnd
991 /// ::= .end_data_region
992 bool DarwinAsmParser::parseDirectiveDataRegionEnd(StringRef, SMLoc) {
993  if (getLexer().isNot(AsmToken::EndOfStatement))
994  return TokError("unexpected token in '.end_data_region' directive");
995 
996  Lex();
997  getStreamer().EmitDataRegion(MCDR_DataRegionEnd);
998  return false;
999 }
1000 
1001 /// parseVersion ::= major, minor [, update]
1002 bool DarwinAsmParser::parseVersion(unsigned *Major, unsigned *Minor,
1003  unsigned *Update) {
1004  // Get the major version number.
1005  if (getLexer().isNot(AsmToken::Integer))
1006  return TokError("invalid OS major version number, integer expected");
1007  int64_t MajorVal = getLexer().getTok().getIntVal();
1008  if (MajorVal > 65535 || MajorVal <= 0)
1009  return TokError("invalid OS major version number");
1010  *Major = (unsigned)MajorVal;
1011  Lex();
1012  if (getLexer().isNot(AsmToken::Comma))
1013  return TokError("OS minor version number required, comma expected");
1014  Lex();
1015  // Get the minor version number.
1016  if (getLexer().isNot(AsmToken::Integer))
1017  return TokError("invalid OS minor version number, integer expected");
1018  int64_t MinorVal = getLexer().getTok().getIntVal();
1019  if (MinorVal > 255 || MinorVal < 0)
1020  return TokError("invalid OS minor version number");
1021  *Minor = MinorVal;
1022  Lex();
1023 
1024  // Get the update level, if specified
1025  *Update = 0;
1026  if (getLexer().is(AsmToken::EndOfStatement))
1027  return false;
1028  if (getLexer().isNot(AsmToken::Comma))
1029  return TokError("invalid OS update specifier, comma expected");
1030  Lex();
1031  if (getLexer().isNot(AsmToken::Integer))
1032  return TokError("invalid OS update version number, integer expected");
1033  int64_t UpdateVal = getLexer().getTok().getIntVal();
1034  if (UpdateVal > 255 || UpdateVal < 0)
1035  return TokError("invalid OS update version number");
1036  *Update = UpdateVal;
1037  Lex();
1038  return false;
1039 }
1040 
1041 void DarwinAsmParser::checkVersion(StringRef Directive, StringRef Arg,
1042  SMLoc Loc, Triple::OSType ExpectedOS) {
1043  const Triple &Target = getContext().getObjectFileInfo()->getTargetTriple();
1044  if (Target.getOS() != ExpectedOS)
1045  Warning(Loc, Twine(Directive) +
1046  (Arg.empty() ? Twine() : Twine(' ') + Arg) +
1047  " used while targeting " + Target.getOSName());
1048 
1049  if (LastVersionDirective.isValid()) {
1050  Warning(Loc, "overriding previous version directive");
1051  Note(LastVersionDirective, "previous definition is here");
1052  }
1053  LastVersionDirective = Loc;
1054 }
1055 
1057  switch (Type) {
1059  case MCVM_TvOSVersionMin: return Triple::TvOS;
1060  case MCVM_IOSVersionMin: return Triple::IOS;
1061  case MCVM_OSXVersionMin: return Triple::MacOSX;
1062  }
1063  llvm_unreachable("Invalid mc version min type");
1064 }
1065 
1066 /// parseVersionMin
1067 /// ::= .ios_version_min parseVersion
1068 /// | .macosx_version_min parseVersion
1069 /// | .tvos_version_min parseVersion
1070 /// | .watchos_version_min parseVersion
1071 bool DarwinAsmParser::parseVersionMin(StringRef Directive, SMLoc Loc,
1073  unsigned Major;
1074  unsigned Minor;
1075  unsigned Update;
1076  if (parseVersion(&Major, &Minor, &Update))
1077  return true;
1078 
1079  if (parseToken(AsmToken::EndOfStatement))
1080  return addErrorSuffix(Twine(" in '") + Directive + "' directive");
1081 
1082  Triple::OSType ExpectedOS = getOSTypeFromMCVM(Type);
1083  checkVersion(Directive, StringRef(), Loc, ExpectedOS);
1084 
1085  getStreamer().EmitVersionMin(Type, Major, Minor, Update);
1086  return false;
1087 }
1088 
1090  switch (Type) {
1092  case MachO::PLATFORM_IOS: return Triple::IOS;
1093  case MachO::PLATFORM_TVOS: return Triple::TvOS;
1095  case MachO::PLATFORM_BRIDGEOS: /* silence warning */break;
1096  }
1097  llvm_unreachable("Invalid mach-o platform type");
1098 }
1099 
1100 /// parseBuildVersion
1101 /// ::= .build_version (macos|ios|tvos|watchos), parseVersion
1102 bool DarwinAsmParser::parseBuildVersion(StringRef Directive, SMLoc Loc) {
1103  StringRef PlatformName;
1104  SMLoc PlatformLoc = getTok().getLoc();
1105  if (getParser().parseIdentifier(PlatformName))
1106  return TokError("platform name expected");
1107 
1108  unsigned Platform = StringSwitch<unsigned>(PlatformName)
1109  .Case("macos", MachO::PLATFORM_MACOS)
1110  .Case("ios", MachO::PLATFORM_IOS)
1111  .Case("tvos", MachO::PLATFORM_TVOS)
1112  .Case("watchos", MachO::PLATFORM_WATCHOS)
1113  .Default(0);
1114  if (Platform == 0)
1115  return Error(PlatformLoc, "unknown platform name");
1116 
1117  if (getLexer().isNot(AsmToken::Comma))
1118  return TokError("version number required, comma expected");
1119  Lex();
1120 
1121  unsigned Major;
1122  unsigned Minor;
1123  unsigned Update;
1124  if (parseVersion(&Major, &Minor, &Update))
1125  return true;
1126 
1127  if (parseToken(AsmToken::EndOfStatement))
1128  return addErrorSuffix(" in '.build_version' directive");
1129 
1130  Triple::OSType ExpectedOS
1132  checkVersion(Directive, PlatformName, Loc, ExpectedOS);
1133 
1134  getStreamer().EmitBuildVersion(Platform, Major, Minor, Update);
1135  return false;
1136 }
1137 
1138 
1139 namespace llvm {
1140 
1142  return new DarwinAsmParser;
1143 }
1144 
1145 } // end llvm namespace
Represents a range in source code.
Definition: SMLoc.h:49
void push_back(const T &Elt)
Definition: SmallVector.h:212
F_Append - When opening a file, if it already exists append to the existing file instead of returning...
Definition: FileSystem.h:679
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
S_ATTR_NO_DEAD_STRIP - No dead stripping.
Definition: MachO.h:190
This represents a section on a Mach-O system (used by Mac OS X).
Compute iterated dominance frontiers using a linear time algorithm.
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:292
.watchos_version_min
Definition: MCDirectives.h:68
.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_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
.data_region jt16
Definition: MCDirectives.h:59
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:283
.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:56
S_ATTR_PURE_INSTRUCTIONS - Section contains only true machine instructions.
Definition: MachO.h:182
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
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 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.
The file should be opened in text mode on platforms that make this distinction.
Definition: FileSystem.h:688
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
A raw_ostream that writes to a file descriptor.
Definition: raw_ostream.h:364
static Version parseVersion(StringRef Name)
const unsigned Kind
.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
constexpr char Size[]
Key for Kernel::Arg::Metadata::mSize.
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