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/MC/MCContext.h"
12 #include "llvm/MC/MCSectionMachO.h"
13 #include "llvm/MC/MCStreamer.h"
14 #include "llvm/MC/MCSymbol.h"
15 #include "llvm/MC/MCParser/MCAsmLexer.h"
16 #include "llvm/MC/MCParser/MCAsmParser.h"
17 #include "llvm/ADT/StringRef.h"
18 #include "llvm/ADT/Twine.h"
19 #include "llvm/Support/MemoryBuffer.h"
20 #include "llvm/Support/SourceMgr.h"
25 /// \brief Implementation of directive handling which is shared across all
27 class DarwinAsmParser : public MCAsmParserExtension {
28 template<bool (DarwinAsmParser::*Handler)(StringRef, SMLoc)>
29 void AddDirectiveHandler(StringRef Directive) {
30 getParser().AddDirectiveHandler(this, Directive,
31 HandleDirective<DarwinAsmParser, Handler>);
34 bool ParseSectionSwitch(const char *Segment, const char *Section,
35 unsigned TAA = 0, unsigned ImplicitAlign = 0,
36 unsigned StubSize = 0);
41 virtual void Initialize(MCAsmParser &Parser) {
42 // Call the base implementation.
43 this->MCAsmParserExtension::Initialize(Parser);
45 AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveDesc>(".desc");
46 AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveLsym>(".lsym");
47 AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveSubsectionsViaSymbols>(
48 ".subsections_via_symbols");
49 AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveDumpOrLoad>(".dump");
50 AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveDumpOrLoad>(".load");
51 AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveSection>(".section");
52 AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveSecureLogUnique>(
53 ".secure_log_unique");
54 AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveSecureLogReset>(
56 AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveTBSS>(".tbss");
57 AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveZerofill>(".zerofill");
59 // Special section directives.
60 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveConst>(".const");
61 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveConstData>(".const_data");
62 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveConstructor>(".constructor");
63 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveCString>(".cstring");
64 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveData>(".data");
65 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveDestructor>(".destructor");
66 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveDyld>(".dyld");
67 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveFVMLibInit0>(".fvmlib_init0");
68 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveFVMLibInit1>(".fvmlib_init1");
69 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveLazySymbolPointers>(".lazy_symbol_pointer");
70 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveLiteral16>(".literal16");
71 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveLiteral4>(".literal4");
72 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveLiteral8>(".literal8");
73 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveModInitFunc>(".mod_init_func");
74 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveModTermFunc>(".mod_term_func");
75 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveNonLazySymbolPointers>(".non_lazy_symbol_pointer");
76 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCCatClsMeth>(".objc_cat_cls_meth");
77 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCCatInstMeth>(".objc_cat_inst_meth");
78 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCCategory>(".objc_category");
79 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCClass>(".objc_class");
80 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCClassNames>(".objc_class_names");
81 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCClassVars>(".objc_class_vars");
82 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCClsMeth>(".objc_cls_meth");
83 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCClsRefs>(".objc_cls_refs");
84 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCInstMeth>(".objc_inst_meth");
85 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCInstanceVars>(".objc_instance_vars");
86 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCMessageRefs>(".objc_message_refs");
87 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCMetaClass>(".objc_meta_class");
88 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCMethVarNames>(".objc_meth_var_names");
89 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCMethVarTypes>(".objc_meth_var_types");
90 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCModuleInfo>(".objc_module_info");
91 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCProtocol>(".objc_protocol");
92 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCSelectorStrs>(".objc_selector_strs");
93 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCStringObject>(".objc_string_object");
94 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCSymbols>(".objc_symbols");
95 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectivePICSymbolStub>(".picsymbol_stub");
96 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveStaticConst>(".static_const");
97 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveStaticData>(".static_data");
98 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveSymbolStub>(".symbol_stub");
99 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveTData>(".tdata");
100 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveText>(".text");
101 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveThreadInitFunc>(".thread_init_func");
102 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveTLV>(".tlv");
104 AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveIdent>(".ident");
107 bool ParseDirectiveDesc(StringRef, SMLoc);
108 bool ParseDirectiveDumpOrLoad(StringRef, SMLoc);
109 bool ParseDirectiveLsym(StringRef, SMLoc);
110 bool ParseDirectiveSection(StringRef, SMLoc);
111 bool ParseDirectiveSecureLogReset(StringRef, SMLoc);
112 bool ParseDirectiveSecureLogUnique(StringRef, SMLoc);
113 bool ParseDirectiveSubsectionsViaSymbols(StringRef, SMLoc);
114 bool ParseDirectiveTBSS(StringRef, SMLoc);
115 bool ParseDirectiveZerofill(StringRef, SMLoc);
117 // Named Section Directive
118 bool ParseSectionDirectiveConst(StringRef, SMLoc) {
119 return ParseSectionSwitch("__TEXT", "__const");
121 bool ParseSectionDirectiveStaticConst(StringRef, SMLoc) {
122 return ParseSectionSwitch("__TEXT", "__static_const");
124 bool ParseSectionDirectiveCString(StringRef, SMLoc) {
125 return ParseSectionSwitch("__TEXT","__cstring",
126 MCSectionMachO::S_CSTRING_LITERALS);
128 bool ParseSectionDirectiveLiteral4(StringRef, SMLoc) {
129 return ParseSectionSwitch("__TEXT", "__literal4",
130 MCSectionMachO::S_4BYTE_LITERALS, 4);
132 bool ParseSectionDirectiveLiteral8(StringRef, SMLoc) {
133 return ParseSectionSwitch("__TEXT", "__literal8",
134 MCSectionMachO::S_8BYTE_LITERALS, 8);
136 bool ParseSectionDirectiveLiteral16(StringRef, SMLoc) {
137 return ParseSectionSwitch("__TEXT","__literal16",
138 MCSectionMachO::S_16BYTE_LITERALS, 16);
140 bool ParseSectionDirectiveConstructor(StringRef, SMLoc) {
141 return ParseSectionSwitch("__TEXT","__constructor");
143 bool ParseSectionDirectiveDestructor(StringRef, SMLoc) {
144 return ParseSectionSwitch("__TEXT","__destructor");
146 bool ParseSectionDirectiveFVMLibInit0(StringRef, SMLoc) {
147 return ParseSectionSwitch("__TEXT","__fvmlib_init0");
149 bool ParseSectionDirectiveFVMLibInit1(StringRef, SMLoc) {
150 return ParseSectionSwitch("__TEXT","__fvmlib_init1");
152 bool ParseSectionDirectiveSymbolStub(StringRef, SMLoc) {
153 return ParseSectionSwitch("__TEXT","__symbol_stub",
154 MCSectionMachO::S_SYMBOL_STUBS |
155 MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
156 // FIXME: Different on PPC and ARM.
159 bool ParseSectionDirectivePICSymbolStub(StringRef, SMLoc) {
160 return ParseSectionSwitch("__TEXT","__picsymbol_stub",
161 MCSectionMachO::S_SYMBOL_STUBS |
162 MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS, 0, 26);
164 bool ParseSectionDirectiveData(StringRef, SMLoc) {
165 return ParseSectionSwitch("__DATA", "__data");
167 bool ParseSectionDirectiveStaticData(StringRef, SMLoc) {
168 return ParseSectionSwitch("__DATA", "__static_data");
170 bool ParseSectionDirectiveNonLazySymbolPointers(StringRef, SMLoc) {
171 return ParseSectionSwitch("__DATA", "__nl_symbol_ptr",
172 MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS, 4);
174 bool ParseSectionDirectiveLazySymbolPointers(StringRef, SMLoc) {
175 return ParseSectionSwitch("__DATA", "__la_symbol_ptr",
176 MCSectionMachO::S_LAZY_SYMBOL_POINTERS, 4);
178 bool ParseSectionDirectiveDyld(StringRef, SMLoc) {
179 return ParseSectionSwitch("__DATA", "__dyld");
181 bool ParseSectionDirectiveModInitFunc(StringRef, SMLoc) {
182 return ParseSectionSwitch("__DATA", "__mod_init_func",
183 MCSectionMachO::S_MOD_INIT_FUNC_POINTERS, 4);
185 bool ParseSectionDirectiveModTermFunc(StringRef, SMLoc) {
186 return ParseSectionSwitch("__DATA", "__mod_term_func",
187 MCSectionMachO::S_MOD_TERM_FUNC_POINTERS, 4);
189 bool ParseSectionDirectiveConstData(StringRef, SMLoc) {
190 return ParseSectionSwitch("__DATA", "__const");
192 bool ParseSectionDirectiveObjCClass(StringRef, SMLoc) {
193 return ParseSectionSwitch("__OBJC", "__class",
194 MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
196 bool ParseSectionDirectiveObjCMetaClass(StringRef, SMLoc) {
197 return ParseSectionSwitch("__OBJC", "__meta_class",
198 MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
200 bool ParseSectionDirectiveObjCCatClsMeth(StringRef, SMLoc) {
201 return ParseSectionSwitch("__OBJC", "__cat_cls_meth",
202 MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
204 bool ParseSectionDirectiveObjCCatInstMeth(StringRef, SMLoc) {
205 return ParseSectionSwitch("__OBJC", "__cat_inst_meth",
206 MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
208 bool ParseSectionDirectiveObjCProtocol(StringRef, SMLoc) {
209 return ParseSectionSwitch("__OBJC", "__protocol",
210 MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
212 bool ParseSectionDirectiveObjCStringObject(StringRef, SMLoc) {
213 return ParseSectionSwitch("__OBJC", "__string_object",
214 MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
216 bool ParseSectionDirectiveObjCClsMeth(StringRef, SMLoc) {
217 return ParseSectionSwitch("__OBJC", "__cls_meth",
218 MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
220 bool ParseSectionDirectiveObjCInstMeth(StringRef, SMLoc) {
221 return ParseSectionSwitch("__OBJC", "__inst_meth",
222 MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
224 bool ParseSectionDirectiveObjCClsRefs(StringRef, SMLoc) {
225 return ParseSectionSwitch("__OBJC", "__cls_refs",
226 MCSectionMachO::S_ATTR_NO_DEAD_STRIP |
227 MCSectionMachO::S_LITERAL_POINTERS, 4);
229 bool ParseSectionDirectiveObjCMessageRefs(StringRef, SMLoc) {
230 return ParseSectionSwitch("__OBJC", "__message_refs",
231 MCSectionMachO::S_ATTR_NO_DEAD_STRIP |
232 MCSectionMachO::S_LITERAL_POINTERS, 4);
234 bool ParseSectionDirectiveObjCSymbols(StringRef, SMLoc) {
235 return ParseSectionSwitch("__OBJC", "__symbols",
236 MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
238 bool ParseSectionDirectiveObjCCategory(StringRef, SMLoc) {
239 return ParseSectionSwitch("__OBJC", "__category",
240 MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
242 bool ParseSectionDirectiveObjCClassVars(StringRef, SMLoc) {
243 return ParseSectionSwitch("__OBJC", "__class_vars",
244 MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
246 bool ParseSectionDirectiveObjCInstanceVars(StringRef, SMLoc) {
247 return ParseSectionSwitch("__OBJC", "__instance_vars",
248 MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
250 bool ParseSectionDirectiveObjCModuleInfo(StringRef, SMLoc) {
251 return ParseSectionSwitch("__OBJC", "__module_info",
252 MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
254 bool ParseSectionDirectiveObjCClassNames(StringRef, SMLoc) {
255 return ParseSectionSwitch("__TEXT", "__cstring",
256 MCSectionMachO::S_CSTRING_LITERALS);
258 bool ParseSectionDirectiveObjCMethVarTypes(StringRef, SMLoc) {
259 return ParseSectionSwitch("__TEXT", "__cstring",
260 MCSectionMachO::S_CSTRING_LITERALS);
262 bool ParseSectionDirectiveObjCMethVarNames(StringRef, SMLoc) {
263 return ParseSectionSwitch("__TEXT", "__cstring",
264 MCSectionMachO::S_CSTRING_LITERALS);
266 bool ParseSectionDirectiveObjCSelectorStrs(StringRef, SMLoc) {
267 return ParseSectionSwitch("__OBJC", "__selector_strs",
268 MCSectionMachO::S_CSTRING_LITERALS);
270 bool ParseSectionDirectiveTData(StringRef, SMLoc) {
271 return ParseSectionSwitch("__DATA", "__thread_data",
272 MCSectionMachO::S_THREAD_LOCAL_REGULAR);
274 bool ParseSectionDirectiveText(StringRef, SMLoc) {
275 return ParseSectionSwitch("__TEXT", "__text",
276 MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS);
278 bool ParseSectionDirectiveTLV(StringRef, SMLoc) {
279 return ParseSectionSwitch("__DATA", "__thread_vars",
280 MCSectionMachO::S_THREAD_LOCAL_VARIABLES);
282 bool ParseSectionDirectiveIdent(StringRef, SMLoc) {
283 // Darwin silently ignores the .ident directive.
284 getParser().EatToEndOfStatement();
287 bool ParseSectionDirectiveThreadInitFunc(StringRef, SMLoc) {
288 return ParseSectionSwitch("__DATA", "__thread_init",
289 MCSectionMachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS);
296 bool DarwinAsmParser::ParseSectionSwitch(const char *Segment,
298 unsigned TAA, unsigned Align,
300 if (getLexer().isNot(AsmToken::EndOfStatement))
301 return TokError("unexpected token in section switching directive");
304 // FIXME: Arch specific.
305 bool isText = StringRef(Segment) == "__TEXT"; // FIXME: Hack.
306 getStreamer().SwitchSection(getContext().getMachOSection(
307 Segment, Section, TAA, StubSize,
308 isText ? SectionKind::getText()
309 : SectionKind::getDataRel()));
311 // Set the implicit alignment, if any.
313 // FIXME: This isn't really what 'as' does; I think it just uses the implicit
314 // alignment on the section (e.g., if one manually inserts bytes into the
315 // section, then just issuing the section switch directive will not realign
316 // the section. However, this is arguably more reasonable behavior, and there
317 // is no good reason for someone to intentionally emit incorrectly sized
318 // values into the implicitly aligned sections.
320 getStreamer().EmitValueToAlignment(Align, 0, 1, 0);
325 /// ParseDirectiveDesc
326 /// ::= .desc identifier , expression
327 bool DarwinAsmParser::ParseDirectiveDesc(StringRef, SMLoc) {
329 if (getParser().ParseIdentifier(Name))
330 return TokError("expected identifier in directive");
332 // Handle the identifier as the key symbol.
333 MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
335 if (getLexer().isNot(AsmToken::Comma))
336 return TokError("unexpected token in '.desc' directive");
340 if (getParser().ParseAbsoluteExpression(DescValue))
343 if (getLexer().isNot(AsmToken::EndOfStatement))
344 return TokError("unexpected token in '.desc' directive");
348 // Set the n_desc field of this Symbol to this DescValue
349 getStreamer().EmitSymbolDesc(Sym, DescValue);
354 /// ParseDirectiveDumpOrLoad
355 /// ::= ( .dump | .load ) "filename"
356 bool DarwinAsmParser::ParseDirectiveDumpOrLoad(StringRef Directive,
358 bool IsDump = Directive == ".dump";
359 if (getLexer().isNot(AsmToken::String))
360 return TokError("expected string in '.dump' or '.load' directive");
364 if (getLexer().isNot(AsmToken::EndOfStatement))
365 return TokError("unexpected token in '.dump' or '.load' directive");
369 // FIXME: If/when .dump and .load are implemented they will be done in the
370 // the assembly parser and not have any need for an MCStreamer API.
372 Warning(IDLoc, "ignoring directive .dump for now");
374 Warning(IDLoc, "ignoring directive .load for now");
379 /// ParseDirectiveLsym
380 /// ::= .lsym identifier , expression
381 bool DarwinAsmParser::ParseDirectiveLsym(StringRef, SMLoc) {
383 if (getParser().ParseIdentifier(Name))
384 return TokError("expected identifier in directive");
386 // Handle the identifier as the key symbol.
387 MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
389 if (getLexer().isNot(AsmToken::Comma))
390 return TokError("unexpected token in '.lsym' directive");
394 if (getParser().ParseExpression(Value))
397 if (getLexer().isNot(AsmToken::EndOfStatement))
398 return TokError("unexpected token in '.lsym' directive");
402 // We don't currently support this directive.
404 // FIXME: Diagnostic location!
406 return TokError("directive '.lsym' is unsupported");
409 /// ParseDirectiveSection:
410 /// ::= .section identifier (',' identifier)*
411 bool DarwinAsmParser::ParseDirectiveSection(StringRef, SMLoc) {
412 SMLoc Loc = getLexer().getLoc();
414 StringRef SectionName;
415 if (getParser().ParseIdentifier(SectionName))
416 return Error(Loc, "expected identifier after '.section' directive");
418 // Verify there is a following comma.
419 if (!getLexer().is(AsmToken::Comma))
420 return TokError("unexpected token in '.section' directive");
422 std::string SectionSpec = SectionName;
425 // Add all the tokens until the end of the line, ParseSectionSpecifier will
427 StringRef EOL = getLexer().LexUntilEndOfStatement();
428 SectionSpec.append(EOL.begin(), EOL.end());
431 if (getLexer().isNot(AsmToken::EndOfStatement))
432 return TokError("unexpected token in '.section' directive");
436 StringRef Segment, Section;
440 std::string ErrorStr =
441 MCSectionMachO::ParseSectionSpecifier(SectionSpec, Segment, Section,
442 TAA, TAAParsed, StubSize);
444 if (!ErrorStr.empty())
445 return Error(Loc, ErrorStr.c_str());
447 // FIXME: Arch specific.
448 bool isText = Segment == "__TEXT"; // FIXME: Hack.
449 getStreamer().SwitchSection(getContext().getMachOSection(
450 Segment, Section, TAA, StubSize,
451 isText ? SectionKind::getText()
452 : SectionKind::getDataRel()));
456 /// ParseDirectiveSecureLogUnique
457 /// ::= .secure_log_unique ... message ...
458 bool DarwinAsmParser::ParseDirectiveSecureLogUnique(StringRef, SMLoc IDLoc) {
459 StringRef LogMessage = getParser().ParseStringToEndOfStatement();
460 if (getLexer().isNot(AsmToken::EndOfStatement))
461 return TokError("unexpected token in '.secure_log_unique' directive");
463 if (getContext().getSecureLogUsed() != false)
464 return Error(IDLoc, ".secure_log_unique specified multiple times");
466 // Get the secure log path.
467 const char *SecureLogFile = getContext().getSecureLogFile();
468 if (SecureLogFile == NULL)
469 return Error(IDLoc, ".secure_log_unique used but AS_SECURE_LOG_FILE "
470 "environment variable unset.");
472 // Open the secure log file if we haven't already.
473 raw_ostream *OS = getContext().getSecureLog();
476 OS = new raw_fd_ostream(SecureLogFile, Err, raw_fd_ostream::F_Append);
479 return Error(IDLoc, Twine("can't open secure log file: ") +
480 SecureLogFile + " (" + Err + ")");
482 getContext().setSecureLog(OS);
485 // Write the message.
486 int CurBuf = getSourceManager().FindBufferContainingLoc(IDLoc);
487 *OS << getSourceManager().getBufferInfo(CurBuf).Buffer->getBufferIdentifier()
488 << ":" << getSourceManager().FindLineNumber(IDLoc, CurBuf) << ":"
489 << LogMessage + "\n";
491 getContext().setSecureLogUsed(true);
496 /// ParseDirectiveSecureLogReset
497 /// ::= .secure_log_reset
498 bool DarwinAsmParser::ParseDirectiveSecureLogReset(StringRef, SMLoc IDLoc) {
499 if (getLexer().isNot(AsmToken::EndOfStatement))
500 return TokError("unexpected token in '.secure_log_reset' directive");
504 getContext().setSecureLogUsed(false);
509 /// ParseDirectiveSubsectionsViaSymbols
510 /// ::= .subsections_via_symbols
511 bool DarwinAsmParser::ParseDirectiveSubsectionsViaSymbols(StringRef, SMLoc) {
512 if (getLexer().isNot(AsmToken::EndOfStatement))
513 return TokError("unexpected token in '.subsections_via_symbols' directive");
517 getStreamer().EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
522 /// ParseDirectiveTBSS
523 /// ::= .tbss identifier, size, align
524 bool DarwinAsmParser::ParseDirectiveTBSS(StringRef, SMLoc) {
525 SMLoc IDLoc = getLexer().getLoc();
527 if (getParser().ParseIdentifier(Name))
528 return TokError("expected identifier in directive");
530 // Handle the identifier as the key symbol.
531 MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
533 if (getLexer().isNot(AsmToken::Comma))
534 return TokError("unexpected token in directive");
538 SMLoc SizeLoc = getLexer().getLoc();
539 if (getParser().ParseAbsoluteExpression(Size))
542 int64_t Pow2Alignment = 0;
543 SMLoc Pow2AlignmentLoc;
544 if (getLexer().is(AsmToken::Comma)) {
546 Pow2AlignmentLoc = getLexer().getLoc();
547 if (getParser().ParseAbsoluteExpression(Pow2Alignment))
551 if (getLexer().isNot(AsmToken::EndOfStatement))
552 return TokError("unexpected token in '.tbss' directive");
557 return Error(SizeLoc, "invalid '.tbss' directive size, can't be less than"
560 // FIXME: Diagnose overflow.
561 if (Pow2Alignment < 0)
562 return Error(Pow2AlignmentLoc, "invalid '.tbss' alignment, can't be less"
565 if (!Sym->isUndefined())
566 return Error(IDLoc, "invalid symbol redefinition");
568 getStreamer().EmitTBSSSymbol(getContext().getMachOSection(
569 "__DATA", "__thread_bss",
570 MCSectionMachO::S_THREAD_LOCAL_ZEROFILL,
571 0, SectionKind::getThreadBSS()),
572 Sym, Size, 1 << Pow2Alignment);
577 /// ParseDirectiveZerofill
578 /// ::= .zerofill segname , sectname [, identifier , size_expression [
579 /// , align_expression ]]
580 bool DarwinAsmParser::ParseDirectiveZerofill(StringRef, SMLoc) {
582 if (getParser().ParseIdentifier(Segment))
583 return TokError("expected segment name after '.zerofill' directive");
585 if (getLexer().isNot(AsmToken::Comma))
586 return TokError("unexpected token in directive");
590 if (getParser().ParseIdentifier(Section))
591 return TokError("expected section name after comma in '.zerofill' "
594 // If this is the end of the line all that was wanted was to create the
595 // the section but with no symbol.
596 if (getLexer().is(AsmToken::EndOfStatement)) {
597 // Create the zerofill section but no symbol
598 getStreamer().EmitZerofill(getContext().getMachOSection(
599 Segment, Section, MCSectionMachO::S_ZEROFILL,
600 0, SectionKind::getBSS()));
604 if (getLexer().isNot(AsmToken::Comma))
605 return TokError("unexpected token in directive");
608 SMLoc IDLoc = getLexer().getLoc();
610 if (getParser().ParseIdentifier(IDStr))
611 return TokError("expected identifier in directive");
613 // handle the identifier as the key symbol.
614 MCSymbol *Sym = getContext().GetOrCreateSymbol(IDStr);
616 if (getLexer().isNot(AsmToken::Comma))
617 return TokError("unexpected token in directive");
621 SMLoc SizeLoc = getLexer().getLoc();
622 if (getParser().ParseAbsoluteExpression(Size))
625 int64_t Pow2Alignment = 0;
626 SMLoc Pow2AlignmentLoc;
627 if (getLexer().is(AsmToken::Comma)) {
629 Pow2AlignmentLoc = getLexer().getLoc();
630 if (getParser().ParseAbsoluteExpression(Pow2Alignment))
634 if (getLexer().isNot(AsmToken::EndOfStatement))
635 return TokError("unexpected token in '.zerofill' directive");
640 return Error(SizeLoc, "invalid '.zerofill' directive size, can't be less "
643 // NOTE: The alignment in the directive is a power of 2 value, the assembler
644 // may internally end up wanting an alignment in bytes.
645 // FIXME: Diagnose overflow.
646 if (Pow2Alignment < 0)
647 return Error(Pow2AlignmentLoc, "invalid '.zerofill' directive alignment, "
648 "can't be less than zero");
650 if (!Sym->isUndefined())
651 return Error(IDLoc, "invalid symbol redefinition");
653 // Create the zerofill Symbol with Size and Pow2Alignment
655 // FIXME: Arch specific.
656 getStreamer().EmitZerofill(getContext().getMachOSection(
657 Segment, Section, MCSectionMachO::S_ZEROFILL,
658 0, SectionKind::getBSS()),
659 Sym, Size, 1 << Pow2Alignment);
666 MCAsmParserExtension *createDarwinAsmParser() {
667 return new DarwinAsmParser;