1 //===- DarwinAsmParser.cpp - Darwin (Mach-O) Assembly Parser --------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "llvm/ADT/SmallVector.h"
10 #include "llvm/ADT/StringRef.h"
11 #include "llvm/ADT/StringSwitch.h"
12 #include "llvm/ADT/Twine.h"
13 #include "llvm/BinaryFormat/MachO.h"
14 #include "llvm/MC/MCContext.h"
15 #include "llvm/MC/MCDirectives.h"
16 #include "llvm/MC/MCParser/MCAsmLexer.h"
17 #include "llvm/MC/MCParser/MCAsmParser.h"
18 #include "llvm/MC/MCParser/MCAsmParserExtension.h"
19 #include "llvm/MC/MCSectionMachO.h"
20 #include "llvm/MC/MCStreamer.h"
21 #include "llvm/MC/MCSymbol.h"
22 #include "llvm/MC/SectionKind.h"
23 #include "llvm/Support/Error.h"
24 #include "llvm/Support/FileSystem.h"
25 #include "llvm/Support/MemoryBuffer.h"
26 #include "llvm/Support/SMLoc.h"
27 #include "llvm/Support/SourceMgr.h"
28 #include "llvm/Support/raw_ostream.h"
29 #include "llvm/TargetParser/Triple.h"
30 #include <cstddef>
31 #include <cstdint>
32 #include <string>
33 #include <system_error>
34 #include <utility>
35
36 using namespace llvm;
37
38 namespace {
39
40 /// Implementation of directive handling which is shared across all
41 /// Darwin targets.
42 class DarwinAsmParser : public MCAsmParserExtension {
43 template<bool (DarwinAsmParser::*HandlerMethod)(StringRef, SMLoc)>
addDirectiveHandler(StringRef Directive)44 void addDirectiveHandler(StringRef Directive) {
45 MCAsmParser::ExtensionDirectiveHandler Handler = std::make_pair(
46 this, HandleDirective<DarwinAsmParser, HandlerMethod>);
47 getParser().addDirectiveHandler(Directive, Handler);
48 }
49
50 bool parseSectionSwitch(StringRef Segment, StringRef Section,
51 unsigned TAA = 0, unsigned ImplicitAlign = 0,
52 unsigned StubSize = 0);
53
54 SMLoc LastVersionDirective;
55
56 public:
57 DarwinAsmParser() = default;
58
Initialize(MCAsmParser & Parser)59 void Initialize(MCAsmParser &Parser) override {
60 // Call the base implementation.
61 this->MCAsmParserExtension::Initialize(Parser);
62
63 addDirectiveHandler<&DarwinAsmParser::parseDirectiveAltEntry>(".alt_entry");
64 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDesc>(".desc");
65 addDirectiveHandler<&DarwinAsmParser::parseDirectiveIndirectSymbol>(
66 ".indirect_symbol");
67 addDirectiveHandler<&DarwinAsmParser::parseDirectiveLsym>(".lsym");
68 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSubsectionsViaSymbols>(
69 ".subsections_via_symbols");
70 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".dump");
71 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".load");
72 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSection>(".section");
73 addDirectiveHandler<&DarwinAsmParser::parseDirectivePushSection>(
74 ".pushsection");
75 addDirectiveHandler<&DarwinAsmParser::parseDirectivePopSection>(
76 ".popsection");
77 addDirectiveHandler<&DarwinAsmParser::parseDirectivePrevious>(".previous");
78 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogUnique>(
79 ".secure_log_unique");
80 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogReset>(
81 ".secure_log_reset");
82 addDirectiveHandler<&DarwinAsmParser::parseDirectiveTBSS>(".tbss");
83 addDirectiveHandler<&DarwinAsmParser::parseDirectiveZerofill>(".zerofill");
84
85 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegion>(
86 ".data_region");
87 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegionEnd>(
88 ".end_data_region");
89
90 // Special section directives.
91 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveBss>(".bss");
92 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConst>(".const");
93 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstData>(
94 ".const_data");
95 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstructor>(
96 ".constructor");
97 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveCString>(
98 ".cstring");
99 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveData>(".data");
100 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDestructor>(
101 ".destructor");
102 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDyld>(".dyld");
103 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit0>(
104 ".fvmlib_init0");
105 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit1>(
106 ".fvmlib_init1");
107 addDirectiveHandler<
108 &DarwinAsmParser::parseSectionDirectiveLazySymbolPointers>(
109 ".lazy_symbol_pointer");
110 addDirectiveHandler<&DarwinAsmParser::parseDirectiveLinkerOption>(
111 ".linker_option");
112 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral16>(
113 ".literal16");
114 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral4>(
115 ".literal4");
116 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral8>(
117 ".literal8");
118 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModInitFunc>(
119 ".mod_init_func");
120 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModTermFunc>(
121 ".mod_term_func");
122 addDirectiveHandler<
123 &DarwinAsmParser::parseSectionDirectiveNonLazySymbolPointers>(
124 ".non_lazy_symbol_pointer");
125 addDirectiveHandler<
126 &DarwinAsmParser::parseSectionDirectiveThreadLocalVariablePointers>(
127 ".thread_local_variable_pointer");
128 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatClsMeth>(
129 ".objc_cat_cls_meth");
130 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatInstMeth>(
131 ".objc_cat_inst_meth");
132 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCategory>(
133 ".objc_category");
134 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClass>(
135 ".objc_class");
136 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassNames>(
137 ".objc_class_names");
138 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassVars>(
139 ".objc_class_vars");
140 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsMeth>(
141 ".objc_cls_meth");
142 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsRefs>(
143 ".objc_cls_refs");
144 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCInstMeth>(
145 ".objc_inst_meth");
146 addDirectiveHandler<
147 &DarwinAsmParser::parseSectionDirectiveObjCInstanceVars>(
148 ".objc_instance_vars");
149 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMessageRefs>(
150 ".objc_message_refs");
151 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMetaClass>(
152 ".objc_meta_class");
153 addDirectiveHandler<
154 &DarwinAsmParser::parseSectionDirectiveObjCMethVarNames>(
155 ".objc_meth_var_names");
156 addDirectiveHandler<
157 &DarwinAsmParser::parseSectionDirectiveObjCMethVarTypes>(
158 ".objc_meth_var_types");
159 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCModuleInfo>(
160 ".objc_module_info");
161 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCProtocol>(
162 ".objc_protocol");
163 addDirectiveHandler<
164 &DarwinAsmParser::parseSectionDirectiveObjCSelectorStrs>(
165 ".objc_selector_strs");
166 addDirectiveHandler<
167 &DarwinAsmParser::parseSectionDirectiveObjCStringObject>(
168 ".objc_string_object");
169 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCSymbols>(
170 ".objc_symbols");
171 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectivePICSymbolStub>(
172 ".picsymbol_stub");
173 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticConst>(
174 ".static_const");
175 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticData>(
176 ".static_data");
177 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveSymbolStub>(
178 ".symbol_stub");
179 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTData>(".tdata");
180 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveText>(".text");
181 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveThreadInitFunc>(
182 ".thread_init_func");
183 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTLV>(".tlv");
184
185 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveIdent>(".ident");
186 addDirectiveHandler<&DarwinAsmParser::parseWatchOSVersionMin>(
187 ".watchos_version_min");
188 addDirectiveHandler<&DarwinAsmParser::parseTvOSVersionMin>(
189 ".tvos_version_min");
190 addDirectiveHandler<&DarwinAsmParser::parseIOSVersionMin>(
191 ".ios_version_min");
192 addDirectiveHandler<&DarwinAsmParser::parseMacOSXVersionMin>(
193 ".macosx_version_min");
194 addDirectiveHandler<&DarwinAsmParser::parseBuildVersion>(".build_version");
195 addDirectiveHandler<&DarwinAsmParser::parseDirectiveCGProfile>(
196 ".cg_profile");
197
198 LastVersionDirective = SMLoc();
199 }
200
201 bool parseDirectiveAltEntry(StringRef, SMLoc);
202 bool parseDirectiveDesc(StringRef, SMLoc);
203 bool parseDirectiveIndirectSymbol(StringRef, SMLoc);
204 bool parseDirectiveDumpOrLoad(StringRef, SMLoc);
205 bool parseDirectiveLsym(StringRef, SMLoc);
206 bool parseDirectiveLinkerOption(StringRef, SMLoc);
207 bool parseDirectiveSection(StringRef, SMLoc);
208 bool parseDirectivePushSection(StringRef, SMLoc);
209 bool parseDirectivePopSection(StringRef, SMLoc);
210 bool parseDirectivePrevious(StringRef, SMLoc);
211 bool parseDirectiveSecureLogReset(StringRef, SMLoc);
212 bool parseDirectiveSecureLogUnique(StringRef, SMLoc);
213 bool parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc);
214 bool parseDirectiveTBSS(StringRef, SMLoc);
215 bool parseDirectiveZerofill(StringRef, SMLoc);
216 bool parseDirectiveDataRegion(StringRef, SMLoc);
217 bool parseDirectiveDataRegionEnd(StringRef, SMLoc);
218
219 // Named Section Directive
parseSectionDirectiveBss(StringRef,SMLoc)220 bool parseSectionDirectiveBss(StringRef, SMLoc) {
221 return parseSectionSwitch("__DATA", "__bss");
222 }
223
parseSectionDirectiveConst(StringRef,SMLoc)224 bool parseSectionDirectiveConst(StringRef, SMLoc) {
225 return parseSectionSwitch("__TEXT", "__const");
226 }
227
parseSectionDirectiveStaticConst(StringRef,SMLoc)228 bool parseSectionDirectiveStaticConst(StringRef, SMLoc) {
229 return parseSectionSwitch("__TEXT", "__static_const");
230 }
231
parseSectionDirectiveCString(StringRef,SMLoc)232 bool parseSectionDirectiveCString(StringRef, SMLoc) {
233 return parseSectionSwitch("__TEXT","__cstring",
234 MachO::S_CSTRING_LITERALS);
235 }
236
parseSectionDirectiveLiteral4(StringRef,SMLoc)237 bool parseSectionDirectiveLiteral4(StringRef, SMLoc) {
238 return parseSectionSwitch("__TEXT", "__literal4",
239 MachO::S_4BYTE_LITERALS, 4);
240 }
241
parseSectionDirectiveLiteral8(StringRef,SMLoc)242 bool parseSectionDirectiveLiteral8(StringRef, SMLoc) {
243 return parseSectionSwitch("__TEXT", "__literal8",
244 MachO::S_8BYTE_LITERALS, 8);
245 }
246
parseSectionDirectiveLiteral16(StringRef,SMLoc)247 bool parseSectionDirectiveLiteral16(StringRef, SMLoc) {
248 return parseSectionSwitch("__TEXT","__literal16",
249 MachO::S_16BYTE_LITERALS, 16);
250 }
251
parseSectionDirectiveConstructor(StringRef,SMLoc)252 bool parseSectionDirectiveConstructor(StringRef, SMLoc) {
253 return parseSectionSwitch("__TEXT","__constructor");
254 }
255
parseSectionDirectiveDestructor(StringRef,SMLoc)256 bool parseSectionDirectiveDestructor(StringRef, SMLoc) {
257 return parseSectionSwitch("__TEXT","__destructor");
258 }
259
parseSectionDirectiveFVMLibInit0(StringRef,SMLoc)260 bool parseSectionDirectiveFVMLibInit0(StringRef, SMLoc) {
261 return parseSectionSwitch("__TEXT","__fvmlib_init0");
262 }
263
parseSectionDirectiveFVMLibInit1(StringRef,SMLoc)264 bool parseSectionDirectiveFVMLibInit1(StringRef, SMLoc) {
265 return parseSectionSwitch("__TEXT","__fvmlib_init1");
266 }
267
parseSectionDirectiveSymbolStub(StringRef,SMLoc)268 bool parseSectionDirectiveSymbolStub(StringRef, SMLoc) {
269 return parseSectionSwitch("__TEXT","__symbol_stub",
270 MachO::S_SYMBOL_STUBS |
271 MachO::S_ATTR_PURE_INSTRUCTIONS,
272 // FIXME: Different on PPC and ARM.
273 0, 16);
274 }
275
parseSectionDirectivePICSymbolStub(StringRef,SMLoc)276 bool parseSectionDirectivePICSymbolStub(StringRef, SMLoc) {
277 return parseSectionSwitch("__TEXT","__picsymbol_stub",
278 MachO::S_SYMBOL_STUBS |
279 MachO::S_ATTR_PURE_INSTRUCTIONS, 0, 26);
280 }
281
parseSectionDirectiveData(StringRef,SMLoc)282 bool parseSectionDirectiveData(StringRef, SMLoc) {
283 return parseSectionSwitch("__DATA", "__data");
284 }
285
parseSectionDirectiveStaticData(StringRef,SMLoc)286 bool parseSectionDirectiveStaticData(StringRef, SMLoc) {
287 return parseSectionSwitch("__DATA", "__static_data");
288 }
289
parseSectionDirectiveNonLazySymbolPointers(StringRef,SMLoc)290 bool parseSectionDirectiveNonLazySymbolPointers(StringRef, SMLoc) {
291 return parseSectionSwitch("__DATA", "__nl_symbol_ptr",
292 MachO::S_NON_LAZY_SYMBOL_POINTERS, 4);
293 }
294
parseSectionDirectiveLazySymbolPointers(StringRef,SMLoc)295 bool parseSectionDirectiveLazySymbolPointers(StringRef, SMLoc) {
296 return parseSectionSwitch("__DATA", "__la_symbol_ptr",
297 MachO::S_LAZY_SYMBOL_POINTERS, 4);
298 }
299
parseSectionDirectiveThreadLocalVariablePointers(StringRef,SMLoc)300 bool parseSectionDirectiveThreadLocalVariablePointers(StringRef, SMLoc) {
301 return parseSectionSwitch("__DATA", "__thread_ptr",
302 MachO::S_THREAD_LOCAL_VARIABLE_POINTERS, 4);
303 }
304
parseSectionDirectiveDyld(StringRef,SMLoc)305 bool parseSectionDirectiveDyld(StringRef, SMLoc) {
306 return parseSectionSwitch("__DATA", "__dyld");
307 }
308
parseSectionDirectiveModInitFunc(StringRef,SMLoc)309 bool parseSectionDirectiveModInitFunc(StringRef, SMLoc) {
310 return parseSectionSwitch("__DATA", "__mod_init_func",
311 MachO::S_MOD_INIT_FUNC_POINTERS, 4);
312 }
313
parseSectionDirectiveModTermFunc(StringRef,SMLoc)314 bool parseSectionDirectiveModTermFunc(StringRef, SMLoc) {
315 return parseSectionSwitch("__DATA", "__mod_term_func",
316 MachO::S_MOD_TERM_FUNC_POINTERS, 4);
317 }
318
parseSectionDirectiveConstData(StringRef,SMLoc)319 bool parseSectionDirectiveConstData(StringRef, SMLoc) {
320 return parseSectionSwitch("__DATA", "__const");
321 }
322
parseSectionDirectiveObjCClass(StringRef,SMLoc)323 bool parseSectionDirectiveObjCClass(StringRef, SMLoc) {
324 return parseSectionSwitch("__OBJC", "__class",
325 MachO::S_ATTR_NO_DEAD_STRIP);
326 }
327
parseSectionDirectiveObjCMetaClass(StringRef,SMLoc)328 bool parseSectionDirectiveObjCMetaClass(StringRef, SMLoc) {
329 return parseSectionSwitch("__OBJC", "__meta_class",
330 MachO::S_ATTR_NO_DEAD_STRIP);
331 }
332
parseSectionDirectiveObjCCatClsMeth(StringRef,SMLoc)333 bool parseSectionDirectiveObjCCatClsMeth(StringRef, SMLoc) {
334 return parseSectionSwitch("__OBJC", "__cat_cls_meth",
335 MachO::S_ATTR_NO_DEAD_STRIP);
336 }
337
parseSectionDirectiveObjCCatInstMeth(StringRef,SMLoc)338 bool parseSectionDirectiveObjCCatInstMeth(StringRef, SMLoc) {
339 return parseSectionSwitch("__OBJC", "__cat_inst_meth",
340 MachO::S_ATTR_NO_DEAD_STRIP);
341 }
342
parseSectionDirectiveObjCProtocol(StringRef,SMLoc)343 bool parseSectionDirectiveObjCProtocol(StringRef, SMLoc) {
344 return parseSectionSwitch("__OBJC", "__protocol",
345 MachO::S_ATTR_NO_DEAD_STRIP);
346 }
347
parseSectionDirectiveObjCStringObject(StringRef,SMLoc)348 bool parseSectionDirectiveObjCStringObject(StringRef, SMLoc) {
349 return parseSectionSwitch("__OBJC", "__string_object",
350 MachO::S_ATTR_NO_DEAD_STRIP);
351 }
352
parseSectionDirectiveObjCClsMeth(StringRef,SMLoc)353 bool parseSectionDirectiveObjCClsMeth(StringRef, SMLoc) {
354 return parseSectionSwitch("__OBJC", "__cls_meth",
355 MachO::S_ATTR_NO_DEAD_STRIP);
356 }
357
parseSectionDirectiveObjCInstMeth(StringRef,SMLoc)358 bool parseSectionDirectiveObjCInstMeth(StringRef, SMLoc) {
359 return parseSectionSwitch("__OBJC", "__inst_meth",
360 MachO::S_ATTR_NO_DEAD_STRIP);
361 }
362
parseSectionDirectiveObjCClsRefs(StringRef,SMLoc)363 bool parseSectionDirectiveObjCClsRefs(StringRef, SMLoc) {
364 return parseSectionSwitch("__OBJC", "__cls_refs",
365 MachO::S_ATTR_NO_DEAD_STRIP |
366 MachO::S_LITERAL_POINTERS, 4);
367 }
368
parseSectionDirectiveObjCMessageRefs(StringRef,SMLoc)369 bool parseSectionDirectiveObjCMessageRefs(StringRef, SMLoc) {
370 return parseSectionSwitch("__OBJC", "__message_refs",
371 MachO::S_ATTR_NO_DEAD_STRIP |
372 MachO::S_LITERAL_POINTERS, 4);
373 }
374
parseSectionDirectiveObjCSymbols(StringRef,SMLoc)375 bool parseSectionDirectiveObjCSymbols(StringRef, SMLoc) {
376 return parseSectionSwitch("__OBJC", "__symbols",
377 MachO::S_ATTR_NO_DEAD_STRIP);
378 }
379
parseSectionDirectiveObjCCategory(StringRef,SMLoc)380 bool parseSectionDirectiveObjCCategory(StringRef, SMLoc) {
381 return parseSectionSwitch("__OBJC", "__category",
382 MachO::S_ATTR_NO_DEAD_STRIP);
383 }
384
parseSectionDirectiveObjCClassVars(StringRef,SMLoc)385 bool parseSectionDirectiveObjCClassVars(StringRef, SMLoc) {
386 return parseSectionSwitch("__OBJC", "__class_vars",
387 MachO::S_ATTR_NO_DEAD_STRIP);
388 }
389
parseSectionDirectiveObjCInstanceVars(StringRef,SMLoc)390 bool parseSectionDirectiveObjCInstanceVars(StringRef, SMLoc) {
391 return parseSectionSwitch("__OBJC", "__instance_vars",
392 MachO::S_ATTR_NO_DEAD_STRIP);
393 }
394
parseSectionDirectiveObjCModuleInfo(StringRef,SMLoc)395 bool parseSectionDirectiveObjCModuleInfo(StringRef, SMLoc) {
396 return parseSectionSwitch("__OBJC", "__module_info",
397 MachO::S_ATTR_NO_DEAD_STRIP);
398 }
399
parseSectionDirectiveObjCClassNames(StringRef,SMLoc)400 bool parseSectionDirectiveObjCClassNames(StringRef, SMLoc) {
401 return parseSectionSwitch("__TEXT", "__cstring",
402 MachO::S_CSTRING_LITERALS);
403 }
404
parseSectionDirectiveObjCMethVarTypes(StringRef,SMLoc)405 bool parseSectionDirectiveObjCMethVarTypes(StringRef, SMLoc) {
406 return parseSectionSwitch("__TEXT", "__cstring",
407 MachO::S_CSTRING_LITERALS);
408 }
409
parseSectionDirectiveObjCMethVarNames(StringRef,SMLoc)410 bool parseSectionDirectiveObjCMethVarNames(StringRef, SMLoc) {
411 return parseSectionSwitch("__TEXT", "__cstring",
412 MachO::S_CSTRING_LITERALS);
413 }
414
parseSectionDirectiveObjCSelectorStrs(StringRef,SMLoc)415 bool parseSectionDirectiveObjCSelectorStrs(StringRef, SMLoc) {
416 return parseSectionSwitch("__OBJC", "__selector_strs",
417 MachO::S_CSTRING_LITERALS);
418 }
419
parseSectionDirectiveTData(StringRef,SMLoc)420 bool parseSectionDirectiveTData(StringRef, SMLoc) {
421 return parseSectionSwitch("__DATA", "__thread_data",
422 MachO::S_THREAD_LOCAL_REGULAR);
423 }
424
parseSectionDirectiveText(StringRef,SMLoc)425 bool parseSectionDirectiveText(StringRef, SMLoc) {
426 return parseSectionSwitch("__TEXT", "__text",
427 MachO::S_ATTR_PURE_INSTRUCTIONS);
428 }
429
parseSectionDirectiveTLV(StringRef,SMLoc)430 bool parseSectionDirectiveTLV(StringRef, SMLoc) {
431 return parseSectionSwitch("__DATA", "__thread_vars",
432 MachO::S_THREAD_LOCAL_VARIABLES);
433 }
434
parseSectionDirectiveIdent(StringRef,SMLoc)435 bool parseSectionDirectiveIdent(StringRef, SMLoc) {
436 // Darwin silently ignores the .ident directive.
437 getParser().eatToEndOfStatement();
438 return false;
439 }
440
parseSectionDirectiveThreadInitFunc(StringRef,SMLoc)441 bool parseSectionDirectiveThreadInitFunc(StringRef, SMLoc) {
442 return parseSectionSwitch("__DATA", "__thread_init",
443 MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS);
444 }
445
parseWatchOSVersionMin(StringRef Directive,SMLoc Loc)446 bool parseWatchOSVersionMin(StringRef Directive, SMLoc Loc) {
447 return parseVersionMin(Directive, Loc, MCVM_WatchOSVersionMin);
448 }
parseTvOSVersionMin(StringRef Directive,SMLoc Loc)449 bool parseTvOSVersionMin(StringRef Directive, SMLoc Loc) {
450 return parseVersionMin(Directive, Loc, MCVM_TvOSVersionMin);
451 }
parseIOSVersionMin(StringRef Directive,SMLoc Loc)452 bool parseIOSVersionMin(StringRef Directive, SMLoc Loc) {
453 return parseVersionMin(Directive, Loc, MCVM_IOSVersionMin);
454 }
parseMacOSXVersionMin(StringRef Directive,SMLoc Loc)455 bool parseMacOSXVersionMin(StringRef Directive, SMLoc Loc) {
456 return parseVersionMin(Directive, Loc, MCVM_OSXVersionMin);
457 }
458
459 bool parseBuildVersion(StringRef Directive, SMLoc Loc);
460 bool parseVersionMin(StringRef Directive, SMLoc Loc, MCVersionMinType Type);
461 bool parseMajorMinorVersionComponent(unsigned *Major, unsigned *Minor,
462 const char *VersionName);
463 bool parseOptionalTrailingVersionComponent(unsigned *Component,
464 const char *ComponentName);
465 bool parseVersion(unsigned *Major, unsigned *Minor, unsigned *Update);
466 bool parseSDKVersion(VersionTuple &SDKVersion);
467 void checkVersion(StringRef Directive, StringRef Arg, SMLoc Loc,
468 Triple::OSType ExpectedOS);
469 bool parseDirectiveCGProfile(StringRef Directive, SMLoc Loc);
470 };
471
472 } // end anonymous namespace
473
parseSectionSwitch(StringRef Segment,StringRef Section,unsigned TAA,unsigned Alignment,unsigned StubSize)474 bool DarwinAsmParser::parseSectionSwitch(StringRef Segment, StringRef Section,
475 unsigned TAA, unsigned Alignment,
476 unsigned StubSize) {
477 if (getLexer().isNot(AsmToken::EndOfStatement))
478 return TokError("unexpected token in section switching directive");
479 Lex();
480
481 // FIXME: Arch specific.
482 bool isText = TAA & MachO::S_ATTR_PURE_INSTRUCTIONS;
483 getStreamer().switchSection(getContext().getMachOSection(
484 Segment, Section, TAA, StubSize,
485 isText ? SectionKind::getText() : SectionKind::getData()));
486
487 // Set the implicit alignment, if any.
488 //
489 // FIXME: This isn't really what 'as' does; I think it just uses the implicit
490 // alignment on the section (e.g., if one manually inserts bytes into the
491 // section, then just issuing the section switch directive will not realign
492 // the section. However, this is arguably more reasonable behavior, and there
493 // is no good reason for someone to intentionally emit incorrectly sized
494 // values into the implicitly aligned sections.
495 if (Alignment)
496 getStreamer().emitValueToAlignment(Align(Alignment));
497
498 return false;
499 }
500
501 /// parseDirectiveAltEntry
502 /// ::= .alt_entry identifier
parseDirectiveAltEntry(StringRef,SMLoc)503 bool DarwinAsmParser::parseDirectiveAltEntry(StringRef, SMLoc) {
504 StringRef Name;
505 if (getParser().parseIdentifier(Name))
506 return TokError("expected identifier in directive");
507
508 // Look up symbol.
509 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
510
511 if (Sym->isDefined())
512 return TokError(".alt_entry must preceed symbol definition");
513
514 if (!getStreamer().emitSymbolAttribute(Sym, MCSA_AltEntry))
515 return TokError("unable to emit symbol attribute");
516
517 Lex();
518 return false;
519 }
520
521 /// parseDirectiveDesc
522 /// ::= .desc identifier , expression
parseDirectiveDesc(StringRef,SMLoc)523 bool DarwinAsmParser::parseDirectiveDesc(StringRef, SMLoc) {
524 StringRef Name;
525 if (getParser().parseIdentifier(Name))
526 return TokError("expected identifier in directive");
527
528 // Handle the identifier as the key symbol.
529 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
530
531 if (getLexer().isNot(AsmToken::Comma))
532 return TokError("unexpected token in '.desc' directive");
533 Lex();
534
535 int64_t DescValue;
536 if (getParser().parseAbsoluteExpression(DescValue))
537 return true;
538
539 if (getLexer().isNot(AsmToken::EndOfStatement))
540 return TokError("unexpected token in '.desc' directive");
541
542 Lex();
543
544 // Set the n_desc field of this Symbol to this DescValue
545 getStreamer().emitSymbolDesc(Sym, DescValue);
546
547 return false;
548 }
549
550 /// parseDirectiveIndirectSymbol
551 /// ::= .indirect_symbol identifier
parseDirectiveIndirectSymbol(StringRef,SMLoc Loc)552 bool DarwinAsmParser::parseDirectiveIndirectSymbol(StringRef, SMLoc Loc) {
553 const MCSectionMachO *Current = static_cast<const MCSectionMachO *>(
554 getStreamer().getCurrentSectionOnly());
555 MachO::SectionType SectionType = Current->getType();
556 if (SectionType != MachO::S_NON_LAZY_SYMBOL_POINTERS &&
557 SectionType != MachO::S_LAZY_SYMBOL_POINTERS &&
558 SectionType != MachO::S_THREAD_LOCAL_VARIABLE_POINTERS &&
559 SectionType != MachO::S_SYMBOL_STUBS)
560 return Error(Loc, "indirect symbol not in a symbol pointer or stub "
561 "section");
562
563 StringRef Name;
564 if (getParser().parseIdentifier(Name))
565 return TokError("expected identifier in .indirect_symbol directive");
566
567 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
568
569 // Assembler local symbols don't make any sense here. Complain loudly.
570 if (Sym->isTemporary())
571 return TokError("non-local symbol required in directive");
572
573 if (!getStreamer().emitSymbolAttribute(Sym, MCSA_IndirectSymbol))
574 return TokError("unable to emit indirect symbol attribute for: " + Name);
575
576 if (getLexer().isNot(AsmToken::EndOfStatement))
577 return TokError("unexpected token in '.indirect_symbol' directive");
578
579 Lex();
580
581 return false;
582 }
583
584 /// parseDirectiveDumpOrLoad
585 /// ::= ( .dump | .load ) "filename"
parseDirectiveDumpOrLoad(StringRef Directive,SMLoc IDLoc)586 bool DarwinAsmParser::parseDirectiveDumpOrLoad(StringRef Directive,
587 SMLoc IDLoc) {
588 bool IsDump = Directive == ".dump";
589 if (getLexer().isNot(AsmToken::String))
590 return TokError("expected string in '.dump' or '.load' directive");
591
592 Lex();
593
594 if (getLexer().isNot(AsmToken::EndOfStatement))
595 return TokError("unexpected token in '.dump' or '.load' directive");
596
597 Lex();
598
599 // FIXME: If/when .dump and .load are implemented they will be done in the
600 // the assembly parser and not have any need for an MCStreamer API.
601 if (IsDump)
602 return Warning(IDLoc, "ignoring directive .dump for now");
603 else
604 return Warning(IDLoc, "ignoring directive .load for now");
605 }
606
607 /// ParseDirectiveLinkerOption
608 /// ::= .linker_option "string" ( , "string" )*
parseDirectiveLinkerOption(StringRef IDVal,SMLoc)609 bool DarwinAsmParser::parseDirectiveLinkerOption(StringRef IDVal, SMLoc) {
610 SmallVector<std::string, 4> Args;
611 while (true) {
612 if (getLexer().isNot(AsmToken::String))
613 return TokError("expected string in '" + Twine(IDVal) + "' directive");
614
615 std::string Data;
616 if (getParser().parseEscapedString(Data))
617 return true;
618
619 Args.push_back(Data);
620
621 if (getLexer().is(AsmToken::EndOfStatement))
622 break;
623
624 if (getLexer().isNot(AsmToken::Comma))
625 return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
626 Lex();
627 }
628
629 getStreamer().emitLinkerOptions(Args);
630 return false;
631 }
632
633 /// parseDirectiveLsym
634 /// ::= .lsym identifier , expression
parseDirectiveLsym(StringRef,SMLoc)635 bool DarwinAsmParser::parseDirectiveLsym(StringRef, SMLoc) {
636 StringRef Name;
637 if (getParser().parseIdentifier(Name))
638 return TokError("expected identifier in directive");
639
640 // Handle the identifier as the key symbol.
641 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
642
643 if (getLexer().isNot(AsmToken::Comma))
644 return TokError("unexpected token in '.lsym' directive");
645 Lex();
646
647 const MCExpr *Value;
648 if (getParser().parseExpression(Value))
649 return true;
650
651 if (getLexer().isNot(AsmToken::EndOfStatement))
652 return TokError("unexpected token in '.lsym' directive");
653
654 Lex();
655
656 // We don't currently support this directive.
657 //
658 // FIXME: Diagnostic location!
659 (void) Sym;
660 return TokError("directive '.lsym' is unsupported");
661 }
662
663 /// parseDirectiveSection:
664 /// ::= .section identifier (',' identifier)*
parseDirectiveSection(StringRef,SMLoc)665 bool DarwinAsmParser::parseDirectiveSection(StringRef, SMLoc) {
666 SMLoc Loc = getLexer().getLoc();
667
668 StringRef SectionName;
669 if (getParser().parseIdentifier(SectionName))
670 return Error(Loc, "expected identifier after '.section' directive");
671
672 // Verify there is a following comma.
673 if (!getLexer().is(AsmToken::Comma))
674 return TokError("unexpected token in '.section' directive");
675
676 std::string SectionSpec = std::string(SectionName);
677 SectionSpec += ",";
678
679 // Add all the tokens until the end of the line, ParseSectionSpecifier will
680 // handle this.
681 StringRef EOL = getLexer().LexUntilEndOfStatement();
682 SectionSpec.append(EOL.begin(), EOL.end());
683
684 Lex();
685 if (getLexer().isNot(AsmToken::EndOfStatement))
686 return TokError("unexpected token in '.section' directive");
687 Lex();
688
689 StringRef Segment, Section;
690 unsigned StubSize;
691 unsigned TAA;
692 bool TAAParsed;
693 if (class Error E = MCSectionMachO::ParseSectionSpecifier(
694 SectionSpec, Segment, Section, TAA, TAAParsed, StubSize))
695 return Error(Loc, toString(std::move(E)));
696
697 // Issue a warning if the target is not powerpc and Section is a *coal* section.
698 Triple TT = getParser().getContext().getTargetTriple();
699 Triple::ArchType ArchTy = TT.getArch();
700
701 if (ArchTy != Triple::ppc && ArchTy != Triple::ppc64) {
702 StringRef NonCoalSection = StringSwitch<StringRef>(Section)
703 .Case("__textcoal_nt", "__text")
704 .Case("__const_coal", "__const")
705 .Case("__datacoal_nt", "__data")
706 .Default(Section);
707
708 if (Section != NonCoalSection) {
709 StringRef SectionVal(Loc.getPointer());
710 size_t B = SectionVal.find(',') + 1, E = SectionVal.find(',', B);
711 SMLoc BLoc = SMLoc::getFromPointer(SectionVal.data() + B);
712 SMLoc ELoc = SMLoc::getFromPointer(SectionVal.data() + E);
713 getParser().Warning(Loc, "section \"" + Section + "\" is deprecated",
714 SMRange(BLoc, ELoc));
715 getParser().Note(Loc, "change section name to \"" + NonCoalSection +
716 "\"", SMRange(BLoc, ELoc));
717 }
718 }
719
720 // FIXME: Arch specific.
721 bool isText = Segment == "__TEXT"; // FIXME: Hack.
722 getStreamer().switchSection(getContext().getMachOSection(
723 Segment, Section, TAA, StubSize,
724 isText ? SectionKind::getText() : SectionKind::getData()));
725 return false;
726 }
727
728 /// ParseDirectivePushSection:
729 /// ::= .pushsection identifier (',' identifier)*
parseDirectivePushSection(StringRef S,SMLoc Loc)730 bool DarwinAsmParser::parseDirectivePushSection(StringRef S, SMLoc Loc) {
731 getStreamer().pushSection();
732
733 if (parseDirectiveSection(S, Loc)) {
734 getStreamer().popSection();
735 return true;
736 }
737
738 return false;
739 }
740
741 /// ParseDirectivePopSection:
742 /// ::= .popsection
parseDirectivePopSection(StringRef,SMLoc)743 bool DarwinAsmParser::parseDirectivePopSection(StringRef, SMLoc) {
744 if (!getStreamer().popSection())
745 return TokError(".popsection without corresponding .pushsection");
746 return false;
747 }
748
749 /// ParseDirectivePrevious:
750 /// ::= .previous
parseDirectivePrevious(StringRef DirName,SMLoc)751 bool DarwinAsmParser::parseDirectivePrevious(StringRef DirName, SMLoc) {
752 MCSectionSubPair PreviousSection = getStreamer().getPreviousSection();
753 if (!PreviousSection.first)
754 return TokError(".previous without corresponding .section");
755 getStreamer().switchSection(PreviousSection.first, PreviousSection.second);
756 return false;
757 }
758
759 /// ParseDirectiveSecureLogUnique
760 /// ::= .secure_log_unique ... message ...
parseDirectiveSecureLogUnique(StringRef,SMLoc IDLoc)761 bool DarwinAsmParser::parseDirectiveSecureLogUnique(StringRef, SMLoc IDLoc) {
762 StringRef LogMessage = getParser().parseStringToEndOfStatement();
763 if (getLexer().isNot(AsmToken::EndOfStatement))
764 return TokError("unexpected token in '.secure_log_unique' directive");
765
766 if (getContext().getSecureLogUsed())
767 return Error(IDLoc, ".secure_log_unique specified multiple times");
768
769 // Get the secure log path.
770 StringRef SecureLogFile = getContext().getSecureLogFile();
771 if (SecureLogFile.empty())
772 return Error(IDLoc, ".secure_log_unique used but AS_SECURE_LOG_FILE "
773 "environment variable unset.");
774
775 // Open the secure log file if we haven't already.
776 raw_fd_ostream *OS = getContext().getSecureLog();
777 if (!OS) {
778 std::error_code EC;
779 auto NewOS = std::make_unique<raw_fd_ostream>(
780 SecureLogFile, EC, sys::fs::OF_Append | sys::fs::OF_TextWithCRLF);
781 if (EC)
782 return Error(IDLoc, Twine("can't open secure log file: ") +
783 SecureLogFile + " (" + EC.message() + ")");
784 OS = NewOS.get();
785 getContext().setSecureLog(std::move(NewOS));
786 }
787
788 // Write the message.
789 unsigned CurBuf = getSourceManager().FindBufferContainingLoc(IDLoc);
790 *OS << getSourceManager().getBufferInfo(CurBuf).Buffer->getBufferIdentifier()
791 << ":" << getSourceManager().FindLineNumber(IDLoc, CurBuf) << ":"
792 << LogMessage + "\n";
793
794 getContext().setSecureLogUsed(true);
795
796 return false;
797 }
798
799 /// ParseDirectiveSecureLogReset
800 /// ::= .secure_log_reset
parseDirectiveSecureLogReset(StringRef,SMLoc IDLoc)801 bool DarwinAsmParser::parseDirectiveSecureLogReset(StringRef, SMLoc IDLoc) {
802 if (getLexer().isNot(AsmToken::EndOfStatement))
803 return TokError("unexpected token in '.secure_log_reset' directive");
804
805 Lex();
806
807 getContext().setSecureLogUsed(false);
808
809 return false;
810 }
811
812 /// parseDirectiveSubsectionsViaSymbols
813 /// ::= .subsections_via_symbols
parseDirectiveSubsectionsViaSymbols(StringRef,SMLoc)814 bool DarwinAsmParser::parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc) {
815 if (getLexer().isNot(AsmToken::EndOfStatement))
816 return TokError("unexpected token in '.subsections_via_symbols' directive");
817
818 Lex();
819
820 getStreamer().emitAssemblerFlag(MCAF_SubsectionsViaSymbols);
821
822 return false;
823 }
824
825 /// ParseDirectiveTBSS
826 /// ::= .tbss identifier, size, align
parseDirectiveTBSS(StringRef,SMLoc)827 bool DarwinAsmParser::parseDirectiveTBSS(StringRef, SMLoc) {
828 SMLoc IDLoc = getLexer().getLoc();
829 StringRef Name;
830 if (getParser().parseIdentifier(Name))
831 return TokError("expected identifier in directive");
832
833 // Handle the identifier as the key symbol.
834 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
835
836 if (getLexer().isNot(AsmToken::Comma))
837 return TokError("unexpected token in directive");
838 Lex();
839
840 int64_t Size;
841 SMLoc SizeLoc = getLexer().getLoc();
842 if (getParser().parseAbsoluteExpression(Size))
843 return true;
844
845 int64_t Pow2Alignment = 0;
846 SMLoc Pow2AlignmentLoc;
847 if (getLexer().is(AsmToken::Comma)) {
848 Lex();
849 Pow2AlignmentLoc = getLexer().getLoc();
850 if (getParser().parseAbsoluteExpression(Pow2Alignment))
851 return true;
852 }
853
854 if (getLexer().isNot(AsmToken::EndOfStatement))
855 return TokError("unexpected token in '.tbss' directive");
856
857 Lex();
858
859 if (Size < 0)
860 return Error(SizeLoc, "invalid '.tbss' directive size, can't be less than"
861 "zero");
862
863 // FIXME: Diagnose overflow.
864 if (Pow2Alignment < 0)
865 return Error(Pow2AlignmentLoc, "invalid '.tbss' alignment, can't be less"
866 "than zero");
867
868 if (!Sym->isUndefined())
869 return Error(IDLoc, "invalid symbol redefinition");
870
871 getStreamer().emitTBSSSymbol(
872 getContext().getMachOSection("__DATA", "__thread_bss",
873 MachO::S_THREAD_LOCAL_ZEROFILL, 0,
874 SectionKind::getThreadBSS()),
875 Sym, Size, Align(1ULL << Pow2Alignment));
876
877 return false;
878 }
879
880 /// ParseDirectiveZerofill
881 /// ::= .zerofill segname , sectname [, identifier , size_expression [
882 /// , align_expression ]]
parseDirectiveZerofill(StringRef,SMLoc)883 bool DarwinAsmParser::parseDirectiveZerofill(StringRef, SMLoc) {
884 StringRef Segment;
885 if (getParser().parseIdentifier(Segment))
886 return TokError("expected segment name after '.zerofill' directive");
887
888 if (getLexer().isNot(AsmToken::Comma))
889 return TokError("unexpected token in directive");
890 Lex();
891
892 StringRef Section;
893 SMLoc SectionLoc = getLexer().getLoc();
894 if (getParser().parseIdentifier(Section))
895 return TokError("expected section name after comma in '.zerofill' "
896 "directive");
897
898 // If this is the end of the line all that was wanted was to create the
899 // the section but with no symbol.
900 if (getLexer().is(AsmToken::EndOfStatement)) {
901 // Create the zerofill section but no symbol
902 getStreamer().emitZerofill(
903 getContext().getMachOSection(Segment, Section, MachO::S_ZEROFILL, 0,
904 SectionKind::getBSS()),
905 /*Symbol=*/nullptr, /*Size=*/0, Align(1), SectionLoc);
906 return false;
907 }
908
909 if (getLexer().isNot(AsmToken::Comma))
910 return TokError("unexpected token in directive");
911 Lex();
912
913 SMLoc IDLoc = getLexer().getLoc();
914 StringRef IDStr;
915 if (getParser().parseIdentifier(IDStr))
916 return TokError("expected identifier in directive");
917
918 // handle the identifier as the key symbol.
919 MCSymbol *Sym = getContext().getOrCreateSymbol(IDStr);
920
921 if (getLexer().isNot(AsmToken::Comma))
922 return TokError("unexpected token in directive");
923 Lex();
924
925 int64_t Size;
926 SMLoc SizeLoc = getLexer().getLoc();
927 if (getParser().parseAbsoluteExpression(Size))
928 return true;
929
930 int64_t Pow2Alignment = 0;
931 SMLoc Pow2AlignmentLoc;
932 if (getLexer().is(AsmToken::Comma)) {
933 Lex();
934 Pow2AlignmentLoc = getLexer().getLoc();
935 if (getParser().parseAbsoluteExpression(Pow2Alignment))
936 return true;
937 }
938
939 if (getLexer().isNot(AsmToken::EndOfStatement))
940 return TokError("unexpected token in '.zerofill' directive");
941
942 Lex();
943
944 if (Size < 0)
945 return Error(SizeLoc, "invalid '.zerofill' directive size, can't be less "
946 "than zero");
947
948 // NOTE: The alignment in the directive is a power of 2 value, the assembler
949 // may internally end up wanting an alignment in bytes.
950 // FIXME: Diagnose overflow.
951 if (Pow2Alignment < 0)
952 return Error(Pow2AlignmentLoc, "invalid '.zerofill' directive alignment, "
953 "can't be less than zero");
954
955 if (!Sym->isUndefined())
956 return Error(IDLoc, "invalid symbol redefinition");
957
958 // Create the zerofill Symbol with Size and Pow2Alignment
959 //
960 // FIXME: Arch specific.
961 getStreamer().emitZerofill(
962 getContext().getMachOSection(Segment, Section, MachO::S_ZEROFILL, 0,
963 SectionKind::getBSS()),
964 Sym, Size, Align(1ULL << Pow2Alignment), SectionLoc);
965
966 return false;
967 }
968
969 /// ParseDirectiveDataRegion
970 /// ::= .data_region [ ( jt8 | jt16 | jt32 ) ]
parseDirectiveDataRegion(StringRef,SMLoc)971 bool DarwinAsmParser::parseDirectiveDataRegion(StringRef, SMLoc) {
972 if (getLexer().is(AsmToken::EndOfStatement)) {
973 Lex();
974 getStreamer().emitDataRegion(MCDR_DataRegion);
975 return false;
976 }
977 StringRef RegionType;
978 SMLoc Loc = getParser().getTok().getLoc();
979 if (getParser().parseIdentifier(RegionType))
980 return TokError("expected region type after '.data_region' directive");
981 int Kind = StringSwitch<int>(RegionType)
982 .Case("jt8", MCDR_DataRegionJT8)
983 .Case("jt16", MCDR_DataRegionJT16)
984 .Case("jt32", MCDR_DataRegionJT32)
985 .Default(-1);
986 if (Kind == -1)
987 return Error(Loc, "unknown region type in '.data_region' directive");
988 Lex();
989
990 getStreamer().emitDataRegion((MCDataRegionType)Kind);
991 return false;
992 }
993
994 /// ParseDirectiveDataRegionEnd
995 /// ::= .end_data_region
parseDirectiveDataRegionEnd(StringRef,SMLoc)996 bool DarwinAsmParser::parseDirectiveDataRegionEnd(StringRef, SMLoc) {
997 if (getLexer().isNot(AsmToken::EndOfStatement))
998 return TokError("unexpected token in '.end_data_region' directive");
999
1000 Lex();
1001 getStreamer().emitDataRegion(MCDR_DataRegionEnd);
1002 return false;
1003 }
1004
isSDKVersionToken(const AsmToken & Tok)1005 static bool isSDKVersionToken(const AsmToken &Tok) {
1006 return Tok.is(AsmToken::Identifier) && Tok.getIdentifier() == "sdk_version";
1007 }
1008
1009 /// parseMajorMinorVersionComponent ::= major, minor
parseMajorMinorVersionComponent(unsigned * Major,unsigned * Minor,const char * VersionName)1010 bool DarwinAsmParser::parseMajorMinorVersionComponent(unsigned *Major,
1011 unsigned *Minor,
1012 const char *VersionName) {
1013 // Get the major version number.
1014 if (getLexer().isNot(AsmToken::Integer))
1015 return TokError(Twine("invalid ") + VersionName +
1016 " major version number, integer expected");
1017 int64_t MajorVal = getLexer().getTok().getIntVal();
1018 if (MajorVal > 65535 || MajorVal <= 0)
1019 return TokError(Twine("invalid ") + VersionName + " major version number");
1020 *Major = (unsigned)MajorVal;
1021 Lex();
1022 if (getLexer().isNot(AsmToken::Comma))
1023 return TokError(Twine(VersionName) +
1024 " minor version number required, comma expected");
1025 Lex();
1026 // Get the minor version number.
1027 if (getLexer().isNot(AsmToken::Integer))
1028 return TokError(Twine("invalid ") + VersionName +
1029 " minor version number, integer expected");
1030 int64_t MinorVal = getLexer().getTok().getIntVal();
1031 if (MinorVal > 255 || MinorVal < 0)
1032 return TokError(Twine("invalid ") + VersionName + " minor version number");
1033 *Minor = MinorVal;
1034 Lex();
1035 return false;
1036 }
1037
1038 /// parseOptionalTrailingVersionComponent ::= , version_number
parseOptionalTrailingVersionComponent(unsigned * Component,const char * ComponentName)1039 bool DarwinAsmParser::parseOptionalTrailingVersionComponent(
1040 unsigned *Component, const char *ComponentName) {
1041 assert(getLexer().is(AsmToken::Comma) && "comma expected");
1042 Lex();
1043 if (getLexer().isNot(AsmToken::Integer))
1044 return TokError(Twine("invalid ") + ComponentName +
1045 " version number, integer expected");
1046 int64_t Val = getLexer().getTok().getIntVal();
1047 if (Val > 255 || Val < 0)
1048 return TokError(Twine("invalid ") + ComponentName + " version number");
1049 *Component = Val;
1050 Lex();
1051 return false;
1052 }
1053
1054 /// parseVersion ::= parseMajorMinorVersionComponent
1055 /// parseOptionalTrailingVersionComponent
parseVersion(unsigned * Major,unsigned * Minor,unsigned * Update)1056 bool DarwinAsmParser::parseVersion(unsigned *Major, unsigned *Minor,
1057 unsigned *Update) {
1058 if (parseMajorMinorVersionComponent(Major, Minor, "OS"))
1059 return true;
1060
1061 // Get the update level, if specified
1062 *Update = 0;
1063 if (getLexer().is(AsmToken::EndOfStatement) ||
1064 isSDKVersionToken(getLexer().getTok()))
1065 return false;
1066 if (getLexer().isNot(AsmToken::Comma))
1067 return TokError("invalid OS update specifier, comma expected");
1068 if (parseOptionalTrailingVersionComponent(Update, "OS update"))
1069 return true;
1070 return false;
1071 }
1072
parseSDKVersion(VersionTuple & SDKVersion)1073 bool DarwinAsmParser::parseSDKVersion(VersionTuple &SDKVersion) {
1074 assert(isSDKVersionToken(getLexer().getTok()) && "expected sdk_version");
1075 Lex();
1076 unsigned Major, Minor;
1077 if (parseMajorMinorVersionComponent(&Major, &Minor, "SDK"))
1078 return true;
1079 SDKVersion = VersionTuple(Major, Minor);
1080
1081 // Get the subminor version, if specified.
1082 if (getLexer().is(AsmToken::Comma)) {
1083 unsigned Subminor;
1084 if (parseOptionalTrailingVersionComponent(&Subminor, "SDK subminor"))
1085 return true;
1086 SDKVersion = VersionTuple(Major, Minor, Subminor);
1087 }
1088 return false;
1089 }
1090
checkVersion(StringRef Directive,StringRef Arg,SMLoc Loc,Triple::OSType ExpectedOS)1091 void DarwinAsmParser::checkVersion(StringRef Directive, StringRef Arg,
1092 SMLoc Loc, Triple::OSType ExpectedOS) {
1093 const Triple &Target = getContext().getTargetTriple();
1094 if (Target.getOS() != ExpectedOS)
1095 Warning(Loc, Twine(Directive) +
1096 (Arg.empty() ? Twine() : Twine(' ') + Arg) +
1097 " used while targeting " + Target.getOSName());
1098
1099 if (LastVersionDirective.isValid()) {
1100 Warning(Loc, "overriding previous version directive");
1101 Note(LastVersionDirective, "previous definition is here");
1102 }
1103 LastVersionDirective = Loc;
1104 }
1105
getOSTypeFromMCVM(MCVersionMinType Type)1106 static Triple::OSType getOSTypeFromMCVM(MCVersionMinType Type) {
1107 switch (Type) {
1108 case MCVM_WatchOSVersionMin: return Triple::WatchOS;
1109 case MCVM_TvOSVersionMin: return Triple::TvOS;
1110 case MCVM_IOSVersionMin: return Triple::IOS;
1111 case MCVM_OSXVersionMin: return Triple::MacOSX;
1112 }
1113 llvm_unreachable("Invalid mc version min type");
1114 }
1115
1116 /// parseVersionMin
1117 /// ::= .ios_version_min parseVersion parseSDKVersion
1118 /// | .macosx_version_min parseVersion parseSDKVersion
1119 /// | .tvos_version_min parseVersion parseSDKVersion
1120 /// | .watchos_version_min parseVersion parseSDKVersion
parseVersionMin(StringRef Directive,SMLoc Loc,MCVersionMinType Type)1121 bool DarwinAsmParser::parseVersionMin(StringRef Directive, SMLoc Loc,
1122 MCVersionMinType Type) {
1123 unsigned Major;
1124 unsigned Minor;
1125 unsigned Update;
1126 if (parseVersion(&Major, &Minor, &Update))
1127 return true;
1128
1129 VersionTuple SDKVersion;
1130 if (isSDKVersionToken(getLexer().getTok()) && parseSDKVersion(SDKVersion))
1131 return true;
1132
1133 if (parseEOL())
1134 return addErrorSuffix(Twine(" in '") + Directive + "' directive");
1135
1136 Triple::OSType ExpectedOS = getOSTypeFromMCVM(Type);
1137 checkVersion(Directive, StringRef(), Loc, ExpectedOS);
1138 getStreamer().emitVersionMin(Type, Major, Minor, Update, SDKVersion);
1139 return false;
1140 }
1141
getOSTypeFromPlatform(MachO::PlatformType Type)1142 static Triple::OSType getOSTypeFromPlatform(MachO::PlatformType Type) {
1143 switch (Type) {
1144 case MachO::PLATFORM_UNKNOWN: /* silence warning */
1145 break;
1146 case MachO::PLATFORM_MACOS: return Triple::MacOSX;
1147 case MachO::PLATFORM_IOS: return Triple::IOS;
1148 case MachO::PLATFORM_TVOS: return Triple::TvOS;
1149 case MachO::PLATFORM_WATCHOS: return Triple::WatchOS;
1150 case MachO::PLATFORM_XROS: return Triple::XROS;
1151 case MachO::PLATFORM_BRIDGEOS: /* silence warning */ break;
1152 case MachO::PLATFORM_DRIVERKIT:
1153 return Triple::DriverKit;
1154 case MachO::PLATFORM_MACCATALYST: return Triple::IOS;
1155 case MachO::PLATFORM_IOSSIMULATOR: /* silence warning */ break;
1156 case MachO::PLATFORM_TVOSSIMULATOR: /* silence warning */ break;
1157 case MachO::PLATFORM_WATCHOSSIMULATOR: /* silence warning */ break;
1158 case MachO::PLATFORM_XROS_SIMULATOR: /* silence warning */ break;
1159 }
1160 llvm_unreachable("Invalid mach-o platform type");
1161 }
1162
1163 /// parseBuildVersion
1164 /// ::= .build_version (macos|ios|tvos|watchos), parseVersion parseSDKVersion
parseBuildVersion(StringRef Directive,SMLoc Loc)1165 bool DarwinAsmParser::parseBuildVersion(StringRef Directive, SMLoc Loc) {
1166 StringRef PlatformName;
1167 SMLoc PlatformLoc = getTok().getLoc();
1168 if (getParser().parseIdentifier(PlatformName))
1169 return TokError("platform name expected");
1170
1171 unsigned Platform = StringSwitch<unsigned>(PlatformName)
1172 #define PLATFORM(platform, id, name, build_name, target, tapi_target, \
1173 marketing) \
1174 .Case(#build_name, MachO::PLATFORM_##platform)
1175 #include "llvm/BinaryFormat/MachO.def"
1176 .Default(MachO::PLATFORM_UNKNOWN);
1177
1178 if (Platform == MachO::PLATFORM_UNKNOWN)
1179 return Error(PlatformLoc, "unknown platform name");
1180
1181 if (getLexer().isNot(AsmToken::Comma))
1182 return TokError("version number required, comma expected");
1183 Lex();
1184
1185 unsigned Major;
1186 unsigned Minor;
1187 unsigned Update;
1188 if (parseVersion(&Major, &Minor, &Update))
1189 return true;
1190
1191 VersionTuple SDKVersion;
1192 if (isSDKVersionToken(getLexer().getTok()) && parseSDKVersion(SDKVersion))
1193 return true;
1194
1195 if (parseEOL())
1196 return addErrorSuffix(" in '.build_version' directive");
1197
1198 Triple::OSType ExpectedOS
1199 = getOSTypeFromPlatform((MachO::PlatformType)Platform);
1200 checkVersion(Directive, PlatformName, Loc, ExpectedOS);
1201 getStreamer().emitBuildVersion(Platform, Major, Minor, Update, SDKVersion);
1202 return false;
1203 }
1204
1205 /// parseDirectiveCGProfile
1206 /// ::= .cg_profile from, to, count
parseDirectiveCGProfile(StringRef S,SMLoc Loc)1207 bool DarwinAsmParser::parseDirectiveCGProfile(StringRef S, SMLoc Loc) {
1208 return MCAsmParserExtension::ParseDirectiveCGProfile(S, Loc);
1209 }
1210
1211 namespace llvm {
1212
createDarwinAsmParser()1213 MCAsmParserExtension *createDarwinAsmParser() {
1214 return new DarwinAsmParser;
1215 }
1216
1217 } // end llvm namespace
1218