1 //===- DarwinAsmParser.cpp - Darwin (Mach-O) Assembly Parser --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/MC/MCParser/MCAsmParserExtension.h"
11 #include "llvm/ADT/StringRef.h"
12 #include "llvm/ADT/StringSwitch.h"
13 #include "llvm/ADT/Triple.h"
14 #include "llvm/ADT/Twine.h"
15 #include "llvm/MC/MCContext.h"
16 #include "llvm/MC/MCObjectFileInfo.h"
17 #include "llvm/MC/MCParser/MCAsmLexer.h"
18 #include "llvm/MC/MCParser/MCAsmParser.h"
19 #include "llvm/MC/MCSectionMachO.h"
20 #include "llvm/MC/MCStreamer.h"
21 #include "llvm/MC/MCSymbol.h"
22 #include "llvm/Support/FileSystem.h"
23 #include "llvm/Support/MemoryBuffer.h"
24 #include "llvm/Support/SourceMgr.h"
29 /// \brief Implementation of directive handling which is shared across all
31 class DarwinAsmParser : public MCAsmParserExtension {
32 template<bool (DarwinAsmParser::*HandlerMethod)(StringRef, SMLoc)>
33 void addDirectiveHandler(StringRef Directive) {
34 MCAsmParser::ExtensionDirectiveHandler Handler = std::make_pair(
35 this, HandleDirective<DarwinAsmParser, HandlerMethod>);
36 getParser().addDirectiveHandler(Directive, Handler);
39 bool parseSectionSwitch(const char *Segment, const char *Section,
40 unsigned TAA = 0, unsigned ImplicitAlign = 0,
41 unsigned StubSize = 0);
43 SMLoc LastVersionMinDirective;
48 void Initialize(MCAsmParser &Parser) override {
49 // Call the base implementation.
50 this->MCAsmParserExtension::Initialize(Parser);
52 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDesc>(".desc");
53 addDirectiveHandler<&DarwinAsmParser::parseDirectiveIndirectSymbol>(
55 addDirectiveHandler<&DarwinAsmParser::parseDirectiveLsym>(".lsym");
56 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSubsectionsViaSymbols>(
57 ".subsections_via_symbols");
58 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".dump");
59 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".load");
60 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSection>(".section");
61 addDirectiveHandler<&DarwinAsmParser::parseDirectivePushSection>(
63 addDirectiveHandler<&DarwinAsmParser::parseDirectivePopSection>(
65 addDirectiveHandler<&DarwinAsmParser::parseDirectivePrevious>(".previous");
66 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogUnique>(
67 ".secure_log_unique");
68 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogReset>(
70 addDirectiveHandler<&DarwinAsmParser::parseDirectiveTBSS>(".tbss");
71 addDirectiveHandler<&DarwinAsmParser::parseDirectiveZerofill>(".zerofill");
73 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegion>(
75 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegionEnd>(
78 // Special section directives.
79 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveBss>(".bss");
80 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConst>(".const");
81 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstData>(
83 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstructor>(
85 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveCString>(
87 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveData>(".data");
88 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDestructor>(
90 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDyld>(".dyld");
91 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit0>(
93 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit1>(
96 &DarwinAsmParser::parseSectionDirectiveLazySymbolPointers>(
97 ".lazy_symbol_pointer");
98 addDirectiveHandler<&DarwinAsmParser::parseDirectiveLinkerOption>(
100 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral16>(
102 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral4>(
104 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral8>(
106 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModInitFunc>(
108 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModTermFunc>(
111 &DarwinAsmParser::parseSectionDirectiveNonLazySymbolPointers>(
112 ".non_lazy_symbol_pointer");
113 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatClsMeth>(
114 ".objc_cat_cls_meth");
115 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatInstMeth>(
116 ".objc_cat_inst_meth");
117 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCategory>(
119 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClass>(
121 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassNames>(
122 ".objc_class_names");
123 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassVars>(
125 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsMeth>(
127 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsRefs>(
129 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCInstMeth>(
132 &DarwinAsmParser::parseSectionDirectiveObjCInstanceVars>(
133 ".objc_instance_vars");
134 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMessageRefs>(
135 ".objc_message_refs");
136 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMetaClass>(
139 &DarwinAsmParser::parseSectionDirectiveObjCMethVarNames>(
140 ".objc_meth_var_names");
142 &DarwinAsmParser::parseSectionDirectiveObjCMethVarTypes>(
143 ".objc_meth_var_types");
144 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCModuleInfo>(
145 ".objc_module_info");
146 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCProtocol>(
149 &DarwinAsmParser::parseSectionDirectiveObjCSelectorStrs>(
150 ".objc_selector_strs");
152 &DarwinAsmParser::parseSectionDirectiveObjCStringObject>(
153 ".objc_string_object");
154 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCSymbols>(
156 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectivePICSymbolStub>(
158 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticConst>(
160 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticData>(
162 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveSymbolStub>(
164 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTData>(".tdata");
165 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveText>(".text");
166 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveThreadInitFunc>(
167 ".thread_init_func");
168 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTLV>(".tlv");
170 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveIdent>(".ident");
171 addDirectiveHandler<&DarwinAsmParser::parseVersionMin>(
172 ".watchos_version_min");
173 addDirectiveHandler<&DarwinAsmParser::parseVersionMin>(".tvos_version_min");
174 addDirectiveHandler<&DarwinAsmParser::parseVersionMin>(".ios_version_min");
175 addDirectiveHandler<&DarwinAsmParser::parseVersionMin>(
176 ".macosx_version_min");
178 LastVersionMinDirective = SMLoc();
181 bool parseDirectiveDesc(StringRef, SMLoc);
182 bool parseDirectiveIndirectSymbol(StringRef, SMLoc);
183 bool parseDirectiveDumpOrLoad(StringRef, SMLoc);
184 bool parseDirectiveLsym(StringRef, SMLoc);
185 bool parseDirectiveLinkerOption(StringRef, SMLoc);
186 bool parseDirectiveSection(StringRef, SMLoc);
187 bool parseDirectivePushSection(StringRef, SMLoc);
188 bool parseDirectivePopSection(StringRef, SMLoc);
189 bool parseDirectivePrevious(StringRef, SMLoc);
190 bool parseDirectiveSecureLogReset(StringRef, SMLoc);
191 bool parseDirectiveSecureLogUnique(StringRef, SMLoc);
192 bool parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc);
193 bool parseDirectiveTBSS(StringRef, SMLoc);
194 bool parseDirectiveZerofill(StringRef, SMLoc);
195 bool parseDirectiveDataRegion(StringRef, SMLoc);
196 bool parseDirectiveDataRegionEnd(StringRef, SMLoc);
198 // Named Section Directive
199 bool parseSectionDirectiveBss(StringRef, SMLoc) {
200 return parseSectionSwitch("__DATA", "__bss");
203 bool parseSectionDirectiveConst(StringRef, SMLoc) {
204 return parseSectionSwitch("__TEXT", "__const");
206 bool parseSectionDirectiveStaticConst(StringRef, SMLoc) {
207 return parseSectionSwitch("__TEXT", "__static_const");
209 bool parseSectionDirectiveCString(StringRef, SMLoc) {
210 return parseSectionSwitch("__TEXT","__cstring",
211 MachO::S_CSTRING_LITERALS);
213 bool parseSectionDirectiveLiteral4(StringRef, SMLoc) {
214 return parseSectionSwitch("__TEXT", "__literal4",
215 MachO::S_4BYTE_LITERALS, 4);
217 bool parseSectionDirectiveLiteral8(StringRef, SMLoc) {
218 return parseSectionSwitch("__TEXT", "__literal8",
219 MachO::S_8BYTE_LITERALS, 8);
221 bool parseSectionDirectiveLiteral16(StringRef, SMLoc) {
222 return parseSectionSwitch("__TEXT","__literal16",
223 MachO::S_16BYTE_LITERALS, 16);
225 bool parseSectionDirectiveConstructor(StringRef, SMLoc) {
226 return parseSectionSwitch("__TEXT","__constructor");
228 bool parseSectionDirectiveDestructor(StringRef, SMLoc) {
229 return parseSectionSwitch("__TEXT","__destructor");
231 bool parseSectionDirectiveFVMLibInit0(StringRef, SMLoc) {
232 return parseSectionSwitch("__TEXT","__fvmlib_init0");
234 bool parseSectionDirectiveFVMLibInit1(StringRef, SMLoc) {
235 return parseSectionSwitch("__TEXT","__fvmlib_init1");
237 bool parseSectionDirectiveSymbolStub(StringRef, SMLoc) {
238 return parseSectionSwitch("__TEXT","__symbol_stub",
239 MachO::S_SYMBOL_STUBS |
240 MachO::S_ATTR_PURE_INSTRUCTIONS,
241 // FIXME: Different on PPC and ARM.
244 bool parseSectionDirectivePICSymbolStub(StringRef, SMLoc) {
245 return parseSectionSwitch("__TEXT","__picsymbol_stub",
246 MachO::S_SYMBOL_STUBS |
247 MachO::S_ATTR_PURE_INSTRUCTIONS, 0, 26);
249 bool parseSectionDirectiveData(StringRef, SMLoc) {
250 return parseSectionSwitch("__DATA", "__data");
252 bool parseSectionDirectiveStaticData(StringRef, SMLoc) {
253 return parseSectionSwitch("__DATA", "__static_data");
255 bool parseSectionDirectiveNonLazySymbolPointers(StringRef, SMLoc) {
256 return parseSectionSwitch("__DATA", "__nl_symbol_ptr",
257 MachO::S_NON_LAZY_SYMBOL_POINTERS, 4);
259 bool parseSectionDirectiveLazySymbolPointers(StringRef, SMLoc) {
260 return parseSectionSwitch("__DATA", "__la_symbol_ptr",
261 MachO::S_LAZY_SYMBOL_POINTERS, 4);
263 bool parseSectionDirectiveDyld(StringRef, SMLoc) {
264 return parseSectionSwitch("__DATA", "__dyld");
266 bool parseSectionDirectiveModInitFunc(StringRef, SMLoc) {
267 return parseSectionSwitch("__DATA", "__mod_init_func",
268 MachO::S_MOD_INIT_FUNC_POINTERS, 4);
270 bool parseSectionDirectiveModTermFunc(StringRef, SMLoc) {
271 return parseSectionSwitch("__DATA", "__mod_term_func",
272 MachO::S_MOD_TERM_FUNC_POINTERS, 4);
274 bool parseSectionDirectiveConstData(StringRef, SMLoc) {
275 return parseSectionSwitch("__DATA", "__const");
277 bool parseSectionDirectiveObjCClass(StringRef, SMLoc) {
278 return parseSectionSwitch("__OBJC", "__class",
279 MachO::S_ATTR_NO_DEAD_STRIP);
281 bool parseSectionDirectiveObjCMetaClass(StringRef, SMLoc) {
282 return parseSectionSwitch("__OBJC", "__meta_class",
283 MachO::S_ATTR_NO_DEAD_STRIP);
285 bool parseSectionDirectiveObjCCatClsMeth(StringRef, SMLoc) {
286 return parseSectionSwitch("__OBJC", "__cat_cls_meth",
287 MachO::S_ATTR_NO_DEAD_STRIP);
289 bool parseSectionDirectiveObjCCatInstMeth(StringRef, SMLoc) {
290 return parseSectionSwitch("__OBJC", "__cat_inst_meth",
291 MachO::S_ATTR_NO_DEAD_STRIP);
293 bool parseSectionDirectiveObjCProtocol(StringRef, SMLoc) {
294 return parseSectionSwitch("__OBJC", "__protocol",
295 MachO::S_ATTR_NO_DEAD_STRIP);
297 bool parseSectionDirectiveObjCStringObject(StringRef, SMLoc) {
298 return parseSectionSwitch("__OBJC", "__string_object",
299 MachO::S_ATTR_NO_DEAD_STRIP);
301 bool parseSectionDirectiveObjCClsMeth(StringRef, SMLoc) {
302 return parseSectionSwitch("__OBJC", "__cls_meth",
303 MachO::S_ATTR_NO_DEAD_STRIP);
305 bool parseSectionDirectiveObjCInstMeth(StringRef, SMLoc) {
306 return parseSectionSwitch("__OBJC", "__inst_meth",
307 MachO::S_ATTR_NO_DEAD_STRIP);
309 bool parseSectionDirectiveObjCClsRefs(StringRef, SMLoc) {
310 return parseSectionSwitch("__OBJC", "__cls_refs",
311 MachO::S_ATTR_NO_DEAD_STRIP |
312 MachO::S_LITERAL_POINTERS, 4);
314 bool parseSectionDirectiveObjCMessageRefs(StringRef, SMLoc) {
315 return parseSectionSwitch("__OBJC", "__message_refs",
316 MachO::S_ATTR_NO_DEAD_STRIP |
317 MachO::S_LITERAL_POINTERS, 4);
319 bool parseSectionDirectiveObjCSymbols(StringRef, SMLoc) {
320 return parseSectionSwitch("__OBJC", "__symbols",
321 MachO::S_ATTR_NO_DEAD_STRIP);
323 bool parseSectionDirectiveObjCCategory(StringRef, SMLoc) {
324 return parseSectionSwitch("__OBJC", "__category",
325 MachO::S_ATTR_NO_DEAD_STRIP);
327 bool parseSectionDirectiveObjCClassVars(StringRef, SMLoc) {
328 return parseSectionSwitch("__OBJC", "__class_vars",
329 MachO::S_ATTR_NO_DEAD_STRIP);
331 bool parseSectionDirectiveObjCInstanceVars(StringRef, SMLoc) {
332 return parseSectionSwitch("__OBJC", "__instance_vars",
333 MachO::S_ATTR_NO_DEAD_STRIP);
335 bool parseSectionDirectiveObjCModuleInfo(StringRef, SMLoc) {
336 return parseSectionSwitch("__OBJC", "__module_info",
337 MachO::S_ATTR_NO_DEAD_STRIP);
339 bool parseSectionDirectiveObjCClassNames(StringRef, SMLoc) {
340 return parseSectionSwitch("__TEXT", "__cstring",
341 MachO::S_CSTRING_LITERALS);
343 bool parseSectionDirectiveObjCMethVarTypes(StringRef, SMLoc) {
344 return parseSectionSwitch("__TEXT", "__cstring",
345 MachO::S_CSTRING_LITERALS);
347 bool parseSectionDirectiveObjCMethVarNames(StringRef, SMLoc) {
348 return parseSectionSwitch("__TEXT", "__cstring",
349 MachO::S_CSTRING_LITERALS);
351 bool parseSectionDirectiveObjCSelectorStrs(StringRef, SMLoc) {
352 return parseSectionSwitch("__OBJC", "__selector_strs",
353 MachO::S_CSTRING_LITERALS);
355 bool parseSectionDirectiveTData(StringRef, SMLoc) {
356 return parseSectionSwitch("__DATA", "__thread_data",
357 MachO::S_THREAD_LOCAL_REGULAR);
359 bool parseSectionDirectiveText(StringRef, SMLoc) {
360 return parseSectionSwitch("__TEXT", "__text",
361 MachO::S_ATTR_PURE_INSTRUCTIONS);
363 bool parseSectionDirectiveTLV(StringRef, SMLoc) {
364 return parseSectionSwitch("__DATA", "__thread_vars",
365 MachO::S_THREAD_LOCAL_VARIABLES);
367 bool parseSectionDirectiveIdent(StringRef, SMLoc) {
368 // Darwin silently ignores the .ident directive.
369 getParser().eatToEndOfStatement();
372 bool parseSectionDirectiveThreadInitFunc(StringRef, SMLoc) {
373 return parseSectionSwitch("__DATA", "__thread_init",
374 MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS);
376 bool parseVersionMin(StringRef, SMLoc);
380 } // end anonymous namespace
382 bool DarwinAsmParser::parseSectionSwitch(const char *Segment,
384 unsigned TAA, unsigned Align,
386 if (getLexer().isNot(AsmToken::EndOfStatement))
387 return TokError("unexpected token in section switching directive");
390 // FIXME: Arch specific.
391 bool isText = TAA & MachO::S_ATTR_PURE_INSTRUCTIONS;
392 getStreamer().SwitchSection(getContext().getMachOSection(
393 Segment, Section, TAA, StubSize,
394 isText ? SectionKind::getText() : SectionKind::getData()));
396 // Set the implicit alignment, if any.
398 // FIXME: This isn't really what 'as' does; I think it just uses the implicit
399 // alignment on the section (e.g., if one manually inserts bytes into the
400 // section, then just issuing the section switch directive will not realign
401 // the section. However, this is arguably more reasonable behavior, and there
402 // is no good reason for someone to intentionally emit incorrectly sized
403 // values into the implicitly aligned sections.
405 getStreamer().EmitValueToAlignment(Align);
410 /// parseDirectiveDesc
411 /// ::= .desc identifier , expression
412 bool DarwinAsmParser::parseDirectiveDesc(StringRef, SMLoc) {
414 if (getParser().parseIdentifier(Name))
415 return TokError("expected identifier in directive");
417 // Handle the identifier as the key symbol.
418 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
420 if (getLexer().isNot(AsmToken::Comma))
421 return TokError("unexpected token in '.desc' directive");
425 if (getParser().parseAbsoluteExpression(DescValue))
428 if (getLexer().isNot(AsmToken::EndOfStatement))
429 return TokError("unexpected token in '.desc' directive");
433 // Set the n_desc field of this Symbol to this DescValue
434 getStreamer().EmitSymbolDesc(Sym, DescValue);
439 /// parseDirectiveIndirectSymbol
440 /// ::= .indirect_symbol identifier
441 bool DarwinAsmParser::parseDirectiveIndirectSymbol(StringRef, SMLoc Loc) {
442 const MCSectionMachO *Current = static_cast<const MCSectionMachO*>(
443 getStreamer().getCurrentSection().first);
444 MachO::SectionType SectionType = Current->getType();
445 if (SectionType != MachO::S_NON_LAZY_SYMBOL_POINTERS &&
446 SectionType != MachO::S_LAZY_SYMBOL_POINTERS &&
447 SectionType != MachO::S_SYMBOL_STUBS)
448 return Error(Loc, "indirect symbol not in a symbol pointer or stub "
452 if (getParser().parseIdentifier(Name))
453 return TokError("expected identifier in .indirect_symbol directive");
455 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
457 // Assembler local symbols don't make any sense here. Complain loudly.
458 if (Sym->isTemporary())
459 return TokError("non-local symbol required in directive");
461 if (!getStreamer().EmitSymbolAttribute(Sym, MCSA_IndirectSymbol))
462 return TokError("unable to emit indirect symbol attribute for: " + Name);
464 if (getLexer().isNot(AsmToken::EndOfStatement))
465 return TokError("unexpected token in '.indirect_symbol' directive");
472 /// parseDirectiveDumpOrLoad
473 /// ::= ( .dump | .load ) "filename"
474 bool DarwinAsmParser::parseDirectiveDumpOrLoad(StringRef Directive,
476 bool IsDump = Directive == ".dump";
477 if (getLexer().isNot(AsmToken::String))
478 return TokError("expected string in '.dump' or '.load' directive");
482 if (getLexer().isNot(AsmToken::EndOfStatement))
483 return TokError("unexpected token in '.dump' or '.load' directive");
487 // FIXME: If/when .dump and .load are implemented they will be done in the
488 // the assembly parser and not have any need for an MCStreamer API.
490 return Warning(IDLoc, "ignoring directive .dump for now");
492 return Warning(IDLoc, "ignoring directive .load for now");
495 /// ParseDirectiveLinkerOption
496 /// ::= .linker_option "string" ( , "string" )*
497 bool DarwinAsmParser::parseDirectiveLinkerOption(StringRef IDVal, SMLoc) {
498 SmallVector<std::string, 4> Args;
500 if (getLexer().isNot(AsmToken::String))
501 return TokError("expected string in '" + Twine(IDVal) + "' directive");
504 if (getParser().parseEscapedString(Data))
507 Args.push_back(Data);
510 if (getLexer().is(AsmToken::EndOfStatement))
513 if (getLexer().isNot(AsmToken::Comma))
514 return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
518 getStreamer().EmitLinkerOptions(Args);
522 /// parseDirectiveLsym
523 /// ::= .lsym identifier , expression
524 bool DarwinAsmParser::parseDirectiveLsym(StringRef, SMLoc) {
526 if (getParser().parseIdentifier(Name))
527 return TokError("expected identifier in directive");
529 // Handle the identifier as the key symbol.
530 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
532 if (getLexer().isNot(AsmToken::Comma))
533 return TokError("unexpected token in '.lsym' directive");
537 if (getParser().parseExpression(Value))
540 if (getLexer().isNot(AsmToken::EndOfStatement))
541 return TokError("unexpected token in '.lsym' directive");
545 // We don't currently support this directive.
547 // FIXME: Diagnostic location!
549 return TokError("directive '.lsym' is unsupported");
552 /// parseDirectiveSection:
553 /// ::= .section identifier (',' identifier)*
554 bool DarwinAsmParser::parseDirectiveSection(StringRef, SMLoc) {
555 SMLoc Loc = getLexer().getLoc();
557 StringRef SectionName;
558 if (getParser().parseIdentifier(SectionName))
559 return Error(Loc, "expected identifier after '.section' directive");
561 // Verify there is a following comma.
562 if (!getLexer().is(AsmToken::Comma))
563 return TokError("unexpected token in '.section' directive");
565 std::string SectionSpec = SectionName;
568 // Add all the tokens until the end of the line, ParseSectionSpecifier will
570 StringRef EOL = getLexer().LexUntilEndOfStatement();
571 SectionSpec.append(EOL.begin(), EOL.end());
574 if (getLexer().isNot(AsmToken::EndOfStatement))
575 return TokError("unexpected token in '.section' directive");
579 StringRef Segment, Section;
583 std::string ErrorStr =
584 MCSectionMachO::ParseSectionSpecifier(SectionSpec, Segment, Section,
585 TAA, TAAParsed, StubSize);
587 if (!ErrorStr.empty())
588 return Error(Loc, ErrorStr.c_str());
590 // Issue a warning if the target is not powerpc and Section is a *coal* section.
591 Triple TT = getParser().getContext().getObjectFileInfo()->getTargetTriple();
592 Triple::ArchType ArchTy = TT.getArch();
594 if (ArchTy != Triple::ppc && ArchTy != Triple::ppc64) {
595 StringRef NonCoalSection = StringSwitch<StringRef>(Section)
596 .Case("__textcoal_nt", "__text")
597 .Case("__const_coal", "__const")
598 .Case("__datacoal_nt", "__data")
601 if (!Section.equals(NonCoalSection)) {
602 StringRef SectionVal(Loc.getPointer());
603 size_t B = SectionVal.find(',') + 1, E = SectionVal.find(',', B);
604 SMLoc BLoc = SMLoc::getFromPointer(SectionVal.data() + B);
605 SMLoc ELoc = SMLoc::getFromPointer(SectionVal.data() + E);
606 getParser().Warning(Loc, "section \"" + Section + "\" is deprecated",
607 SMRange(BLoc, ELoc));
608 getParser().Note(Loc, "change section name to \"" + NonCoalSection +
609 "\"", SMRange(BLoc, ELoc));
613 // FIXME: Arch specific.
614 bool isText = Segment == "__TEXT"; // FIXME: Hack.
615 getStreamer().SwitchSection(getContext().getMachOSection(
616 Segment, Section, TAA, StubSize,
617 isText ? SectionKind::getText() : SectionKind::getData()));
621 /// ParseDirectivePushSection:
622 /// ::= .pushsection identifier (',' identifier)*
623 bool DarwinAsmParser::parseDirectivePushSection(StringRef S, SMLoc Loc) {
624 getStreamer().PushSection();
626 if (parseDirectiveSection(S, Loc)) {
627 getStreamer().PopSection();
634 /// ParseDirectivePopSection:
636 bool DarwinAsmParser::parseDirectivePopSection(StringRef, SMLoc) {
637 if (!getStreamer().PopSection())
638 return TokError(".popsection without corresponding .pushsection");
642 /// ParseDirectivePrevious:
644 bool DarwinAsmParser::parseDirectivePrevious(StringRef DirName, SMLoc) {
645 MCSectionSubPair PreviousSection = getStreamer().getPreviousSection();
646 if (!PreviousSection.first)
647 return TokError(".previous without corresponding .section");
648 getStreamer().SwitchSection(PreviousSection.first, PreviousSection.second);
652 /// ParseDirectiveSecureLogUnique
653 /// ::= .secure_log_unique ... message ...
654 bool DarwinAsmParser::parseDirectiveSecureLogUnique(StringRef, SMLoc IDLoc) {
655 StringRef LogMessage = getParser().parseStringToEndOfStatement();
656 if (getLexer().isNot(AsmToken::EndOfStatement))
657 return TokError("unexpected token in '.secure_log_unique' directive");
659 if (getContext().getSecureLogUsed())
660 return Error(IDLoc, ".secure_log_unique specified multiple times");
662 // Get the secure log path.
663 const char *SecureLogFile = getContext().getSecureLogFile();
665 return Error(IDLoc, ".secure_log_unique used but AS_SECURE_LOG_FILE "
666 "environment variable unset.");
668 // Open the secure log file if we haven't already.
669 raw_ostream *OS = getContext().getSecureLog();
672 OS = new raw_fd_ostream(SecureLogFile, EC,
673 sys::fs::F_Append | sys::fs::F_Text);
676 return Error(IDLoc, Twine("can't open secure log file: ") +
677 SecureLogFile + " (" + EC.message() + ")");
679 getContext().setSecureLog(OS);
682 // Write the message.
683 unsigned CurBuf = getSourceManager().FindBufferContainingLoc(IDLoc);
684 *OS << getSourceManager().getBufferInfo(CurBuf).Buffer->getBufferIdentifier()
685 << ":" << getSourceManager().FindLineNumber(IDLoc, CurBuf) << ":"
686 << LogMessage + "\n";
688 getContext().setSecureLogUsed(true);
693 /// ParseDirectiveSecureLogReset
694 /// ::= .secure_log_reset
695 bool DarwinAsmParser::parseDirectiveSecureLogReset(StringRef, SMLoc IDLoc) {
696 if (getLexer().isNot(AsmToken::EndOfStatement))
697 return TokError("unexpected token in '.secure_log_reset' directive");
701 getContext().setSecureLogUsed(false);
706 /// parseDirectiveSubsectionsViaSymbols
707 /// ::= .subsections_via_symbols
708 bool DarwinAsmParser::parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc) {
709 if (getLexer().isNot(AsmToken::EndOfStatement))
710 return TokError("unexpected token in '.subsections_via_symbols' directive");
714 getStreamer().EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
719 /// ParseDirectiveTBSS
720 /// ::= .tbss identifier, size, align
721 bool DarwinAsmParser::parseDirectiveTBSS(StringRef, SMLoc) {
722 SMLoc IDLoc = getLexer().getLoc();
724 if (getParser().parseIdentifier(Name))
725 return TokError("expected identifier in directive");
727 // Handle the identifier as the key symbol.
728 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
730 if (getLexer().isNot(AsmToken::Comma))
731 return TokError("unexpected token in directive");
735 SMLoc SizeLoc = getLexer().getLoc();
736 if (getParser().parseAbsoluteExpression(Size))
739 int64_t Pow2Alignment = 0;
740 SMLoc Pow2AlignmentLoc;
741 if (getLexer().is(AsmToken::Comma)) {
743 Pow2AlignmentLoc = getLexer().getLoc();
744 if (getParser().parseAbsoluteExpression(Pow2Alignment))
748 if (getLexer().isNot(AsmToken::EndOfStatement))
749 return TokError("unexpected token in '.tbss' directive");
754 return Error(SizeLoc, "invalid '.tbss' directive size, can't be less than"
757 // FIXME: Diagnose overflow.
758 if (Pow2Alignment < 0)
759 return Error(Pow2AlignmentLoc, "invalid '.tbss' alignment, can't be less"
762 if (!Sym->isUndefined())
763 return Error(IDLoc, "invalid symbol redefinition");
765 getStreamer().EmitTBSSSymbol(getContext().getMachOSection(
766 "__DATA", "__thread_bss",
767 MachO::S_THREAD_LOCAL_ZEROFILL,
768 0, SectionKind::getThreadBSS()),
769 Sym, Size, 1 << Pow2Alignment);
774 /// ParseDirectiveZerofill
775 /// ::= .zerofill segname , sectname [, identifier , size_expression [
776 /// , align_expression ]]
777 bool DarwinAsmParser::parseDirectiveZerofill(StringRef, SMLoc) {
779 if (getParser().parseIdentifier(Segment))
780 return TokError("expected segment name after '.zerofill' directive");
782 if (getLexer().isNot(AsmToken::Comma))
783 return TokError("unexpected token in directive");
787 if (getParser().parseIdentifier(Section))
788 return TokError("expected section name after comma in '.zerofill' "
791 // If this is the end of the line all that was wanted was to create the
792 // the section but with no symbol.
793 if (getLexer().is(AsmToken::EndOfStatement)) {
794 // Create the zerofill section but no symbol
795 getStreamer().EmitZerofill(getContext().getMachOSection(
796 Segment, Section, MachO::S_ZEROFILL,
797 0, SectionKind::getBSS()));
801 if (getLexer().isNot(AsmToken::Comma))
802 return TokError("unexpected token in directive");
805 SMLoc IDLoc = getLexer().getLoc();
807 if (getParser().parseIdentifier(IDStr))
808 return TokError("expected identifier in directive");
810 // handle the identifier as the key symbol.
811 MCSymbol *Sym = getContext().getOrCreateSymbol(IDStr);
813 if (getLexer().isNot(AsmToken::Comma))
814 return TokError("unexpected token in directive");
818 SMLoc SizeLoc = getLexer().getLoc();
819 if (getParser().parseAbsoluteExpression(Size))
822 int64_t Pow2Alignment = 0;
823 SMLoc Pow2AlignmentLoc;
824 if (getLexer().is(AsmToken::Comma)) {
826 Pow2AlignmentLoc = getLexer().getLoc();
827 if (getParser().parseAbsoluteExpression(Pow2Alignment))
831 if (getLexer().isNot(AsmToken::EndOfStatement))
832 return TokError("unexpected token in '.zerofill' directive");
837 return Error(SizeLoc, "invalid '.zerofill' directive size, can't be less "
840 // NOTE: The alignment in the directive is a power of 2 value, the assembler
841 // may internally end up wanting an alignment in bytes.
842 // FIXME: Diagnose overflow.
843 if (Pow2Alignment < 0)
844 return Error(Pow2AlignmentLoc, "invalid '.zerofill' directive alignment, "
845 "can't be less than zero");
847 if (!Sym->isUndefined())
848 return Error(IDLoc, "invalid symbol redefinition");
850 // Create the zerofill Symbol with Size and Pow2Alignment
852 // FIXME: Arch specific.
853 getStreamer().EmitZerofill(getContext().getMachOSection(
854 Segment, Section, MachO::S_ZEROFILL,
855 0, SectionKind::getBSS()),
856 Sym, Size, 1 << Pow2Alignment);
861 /// ParseDirectiveDataRegion
862 /// ::= .data_region [ ( jt8 | jt16 | jt32 ) ]
863 bool DarwinAsmParser::parseDirectiveDataRegion(StringRef, SMLoc) {
864 if (getLexer().is(AsmToken::EndOfStatement)) {
866 getStreamer().EmitDataRegion(MCDR_DataRegion);
869 StringRef RegionType;
870 SMLoc Loc = getParser().getTok().getLoc();
871 if (getParser().parseIdentifier(RegionType))
872 return TokError("expected region type after '.data_region' directive");
873 int Kind = StringSwitch<int>(RegionType)
874 .Case("jt8", MCDR_DataRegionJT8)
875 .Case("jt16", MCDR_DataRegionJT16)
876 .Case("jt32", MCDR_DataRegionJT32)
879 return Error(Loc, "unknown region type in '.data_region' directive");
882 getStreamer().EmitDataRegion((MCDataRegionType)Kind);
886 /// ParseDirectiveDataRegionEnd
887 /// ::= .end_data_region
888 bool DarwinAsmParser::parseDirectiveDataRegionEnd(StringRef, SMLoc) {
889 if (getLexer().isNot(AsmToken::EndOfStatement))
890 return TokError("unexpected token in '.end_data_region' directive");
893 getStreamer().EmitDataRegion(MCDR_DataRegionEnd);
898 /// ::= .ios_version_min major,minor[,update]
899 /// ::= .macosx_version_min major,minor[,update]
900 bool DarwinAsmParser::parseVersionMin(StringRef Directive, SMLoc Loc) {
901 int64_t Major = 0, Minor = 0, Update = 0;
902 int Kind = StringSwitch<int>(Directive)
903 .Case(".watchos_version_min", MCVM_WatchOSVersionMin)
904 .Case(".tvos_version_min", MCVM_TvOSVersionMin)
905 .Case(".ios_version_min", MCVM_IOSVersionMin)
906 .Case(".macosx_version_min", MCVM_OSXVersionMin);
907 // Get the major version number.
908 if (getLexer().isNot(AsmToken::Integer))
909 return TokError("invalid OS major version number");
910 Major = getLexer().getTok().getIntVal();
911 if (Major > 65535 || Major <= 0)
912 return TokError("invalid OS major version number");
914 if (getLexer().isNot(AsmToken::Comma))
915 return TokError("minor OS version number required, comma expected");
917 // Get the minor version number.
918 if (getLexer().isNot(AsmToken::Integer))
919 return TokError("invalid OS minor version number");
920 Minor = getLexer().getTok().getIntVal();
921 if (Minor > 255 || Minor < 0)
922 return TokError("invalid OS minor version number");
924 // Get the update level, if specified
925 if (getLexer().isNot(AsmToken::EndOfStatement)) {
926 if (getLexer().isNot(AsmToken::Comma))
927 return TokError("invalid update specifier, comma expected");
929 if (getLexer().isNot(AsmToken::Integer))
930 return TokError("invalid OS update number");
931 Update = getLexer().getTok().getIntVal();
932 if (Update > 255 || Update < 0)
933 return TokError("invalid OS update number");
937 const Triple &T = getContext().getObjectFileInfo()->getTargetTriple();
938 Triple::OSType ExpectedOS = Triple::UnknownOS;
939 switch ((MCVersionMinType)Kind) {
940 case MCVM_WatchOSVersionMin: ExpectedOS = Triple::WatchOS; break;
941 case MCVM_TvOSVersionMin: ExpectedOS = Triple::TvOS; break;
942 case MCVM_IOSVersionMin: ExpectedOS = Triple::IOS; break;
943 case MCVM_OSXVersionMin: ExpectedOS = Triple::MacOSX; break;
945 if (T.getOS() != ExpectedOS)
946 Warning(Loc, Directive + " should only be used for " +
947 Triple::getOSTypeName(ExpectedOS) + " targets");
949 if (LastVersionMinDirective.isValid()) {
950 Warning(Loc, "overriding previous version_min directive");
951 Note(LastVersionMinDirective, "previous definition is here");
953 LastVersionMinDirective = Loc;
955 // We've parsed a correct version specifier, so send it to the streamer.
956 getStreamer().EmitVersionMin((MCVersionMinType)Kind, Major, Minor, Update);
963 MCAsmParserExtension *createDarwinAsmParser() {
964 return new DarwinAsmParser;
967 } // end llvm namespace