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/STLExtras.h"
10 #include "llvm/ADT/SmallVector.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/BinaryFormat/MachO.h"
16 #include "llvm/MC/MCContext.h"
17 #include "llvm/MC/MCDirectives.h"
18 #include "llvm/MC/MCObjectFileInfo.h"
19 #include "llvm/MC/MCParser/MCAsmLexer.h"
20 #include "llvm/MC/MCParser/MCAsmParser.h"
21 #include "llvm/MC/MCParser/MCAsmParserExtension.h"
22 #include "llvm/MC/MCSectionMachO.h"
23 #include "llvm/MC/MCStreamer.h"
24 #include "llvm/MC/MCSymbol.h"
25 #include "llvm/MC/SectionKind.h"
26 #include "llvm/Support/FileSystem.h"
27 #include "llvm/Support/MemoryBuffer.h"
28 #include "llvm/Support/SMLoc.h"
29 #include "llvm/Support/SourceMgr.h"
30 #include "llvm/Support/raw_ostream.h"
31 #include <algorithm>
32 #include <cstddef>
33 #include <cstdint>
34 #include <string>
35 #include <system_error>
36 #include <utility>
37
38 using namespace llvm;
39
40 namespace {
41
42 /// Implementation of directive handling which is shared across all
43 /// Darwin targets.
44 class DarwinAsmParser : public MCAsmParserExtension {
45 template<bool (DarwinAsmParser::*HandlerMethod)(StringRef, SMLoc)>
addDirectiveHandler(StringRef Directive)46 void addDirectiveHandler(StringRef Directive) {
47 MCAsmParser::ExtensionDirectiveHandler Handler = std::make_pair(
48 this, HandleDirective<DarwinAsmParser, HandlerMethod>);
49 getParser().addDirectiveHandler(Directive, Handler);
50 }
51
52 bool parseSectionSwitch(StringRef Segment, StringRef Section,
53 unsigned TAA = 0, unsigned ImplicitAlign = 0,
54 unsigned StubSize = 0);
55
56 SMLoc LastVersionDirective;
57
58 public:
59 DarwinAsmParser() = default;
60
Initialize(MCAsmParser & Parser)61 void Initialize(MCAsmParser &Parser) override {
62 // Call the base implementation.
63 this->MCAsmParserExtension::Initialize(Parser);
64
65 addDirectiveHandler<&DarwinAsmParser::parseDirectiveAltEntry>(".alt_entry");
66 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDesc>(".desc");
67 addDirectiveHandler<&DarwinAsmParser::parseDirectiveIndirectSymbol>(
68 ".indirect_symbol");
69 addDirectiveHandler<&DarwinAsmParser::parseDirectiveLsym>(".lsym");
70 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSubsectionsViaSymbols>(
71 ".subsections_via_symbols");
72 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".dump");
73 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".load");
74 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSection>(".section");
75 addDirectiveHandler<&DarwinAsmParser::parseDirectivePushSection>(
76 ".pushsection");
77 addDirectiveHandler<&DarwinAsmParser::parseDirectivePopSection>(
78 ".popsection");
79 addDirectiveHandler<&DarwinAsmParser::parseDirectivePrevious>(".previous");
80 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogUnique>(
81 ".secure_log_unique");
82 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogReset>(
83 ".secure_log_reset");
84 addDirectiveHandler<&DarwinAsmParser::parseDirectiveTBSS>(".tbss");
85 addDirectiveHandler<&DarwinAsmParser::parseDirectiveZerofill>(".zerofill");
86
87 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegion>(
88 ".data_region");
89 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegionEnd>(
90 ".end_data_region");
91
92 // Special section directives.
93 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveBss>(".bss");
94 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConst>(".const");
95 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstData>(
96 ".const_data");
97 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstructor>(
98 ".constructor");
99 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveCString>(
100 ".cstring");
101 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveData>(".data");
102 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDestructor>(
103 ".destructor");
104 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDyld>(".dyld");
105 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit0>(
106 ".fvmlib_init0");
107 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit1>(
108 ".fvmlib_init1");
109 addDirectiveHandler<
110 &DarwinAsmParser::parseSectionDirectiveLazySymbolPointers>(
111 ".lazy_symbol_pointer");
112 addDirectiveHandler<&DarwinAsmParser::parseDirectiveLinkerOption>(
113 ".linker_option");
114 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral16>(
115 ".literal16");
116 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral4>(
117 ".literal4");
118 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral8>(
119 ".literal8");
120 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModInitFunc>(
121 ".mod_init_func");
122 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModTermFunc>(
123 ".mod_term_func");
124 addDirectiveHandler<
125 &DarwinAsmParser::parseSectionDirectiveNonLazySymbolPointers>(
126 ".non_lazy_symbol_pointer");
127 addDirectiveHandler<
128 &DarwinAsmParser::parseSectionDirectiveThreadLocalVariablePointers>(
129 ".thread_local_variable_pointer");
130 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatClsMeth>(
131 ".objc_cat_cls_meth");
132 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatInstMeth>(
133 ".objc_cat_inst_meth");
134 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCategory>(
135 ".objc_category");
136 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClass>(
137 ".objc_class");
138 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassNames>(
139 ".objc_class_names");
140 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassVars>(
141 ".objc_class_vars");
142 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsMeth>(
143 ".objc_cls_meth");
144 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsRefs>(
145 ".objc_cls_refs");
146 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCInstMeth>(
147 ".objc_inst_meth");
148 addDirectiveHandler<
149 &DarwinAsmParser::parseSectionDirectiveObjCInstanceVars>(
150 ".objc_instance_vars");
151 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMessageRefs>(
152 ".objc_message_refs");
153 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMetaClass>(
154 ".objc_meta_class");
155 addDirectiveHandler<
156 &DarwinAsmParser::parseSectionDirectiveObjCMethVarNames>(
157 ".objc_meth_var_names");
158 addDirectiveHandler<
159 &DarwinAsmParser::parseSectionDirectiveObjCMethVarTypes>(
160 ".objc_meth_var_types");
161 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCModuleInfo>(
162 ".objc_module_info");
163 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCProtocol>(
164 ".objc_protocol");
165 addDirectiveHandler<
166 &DarwinAsmParser::parseSectionDirectiveObjCSelectorStrs>(
167 ".objc_selector_strs");
168 addDirectiveHandler<
169 &DarwinAsmParser::parseSectionDirectiveObjCStringObject>(
170 ".objc_string_object");
171 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCSymbols>(
172 ".objc_symbols");
173 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectivePICSymbolStub>(
174 ".picsymbol_stub");
175 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticConst>(
176 ".static_const");
177 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticData>(
178 ".static_data");
179 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveSymbolStub>(
180 ".symbol_stub");
181 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTData>(".tdata");
182 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveText>(".text");
183 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveThreadInitFunc>(
184 ".thread_init_func");
185 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTLV>(".tlv");
186
187 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveIdent>(".ident");
188 addDirectiveHandler<&DarwinAsmParser::parseWatchOSVersionMin>(
189 ".watchos_version_min");
190 addDirectiveHandler<&DarwinAsmParser::parseTvOSVersionMin>(
191 ".tvos_version_min");
192 addDirectiveHandler<&DarwinAsmParser::parseIOSVersionMin>(
193 ".ios_version_min");
194 addDirectiveHandler<&DarwinAsmParser::parseMacOSXVersionMin>(
195 ".macosx_version_min");
196 addDirectiveHandler<&DarwinAsmParser::parseBuildVersion>(".build_version");
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 };
470
471 } // end anonymous namespace
472
parseSectionSwitch(StringRef Segment,StringRef Section,unsigned TAA,unsigned Align,unsigned StubSize)473 bool DarwinAsmParser::parseSectionSwitch(StringRef Segment, StringRef Section,
474 unsigned TAA, unsigned Align,
475 unsigned StubSize) {
476 if (getLexer().isNot(AsmToken::EndOfStatement))
477 return TokError("unexpected token in section switching directive");
478 Lex();
479
480 // FIXME: Arch specific.
481 bool isText = TAA & MachO::S_ATTR_PURE_INSTRUCTIONS;
482 getStreamer().SwitchSection(getContext().getMachOSection(
483 Segment, Section, TAA, StubSize,
484 isText ? SectionKind::getText() : SectionKind::getData()));
485
486 // Set the implicit alignment, if any.
487 //
488 // FIXME: This isn't really what 'as' does; I think it just uses the implicit
489 // alignment on the section (e.g., if one manually inserts bytes into the
490 // section, then just issuing the section switch directive will not realign
491 // the section. However, this is arguably more reasonable behavior, and there
492 // is no good reason for someone to intentionally emit incorrectly sized
493 // values into the implicitly aligned sections.
494 if (Align)
495 getStreamer().emitValueToAlignment(Align);
496
497 return false;
498 }
499
500 /// parseDirectiveAltEntry
501 /// ::= .alt_entry identifier
parseDirectiveAltEntry(StringRef,SMLoc)502 bool DarwinAsmParser::parseDirectiveAltEntry(StringRef, SMLoc) {
503 StringRef Name;
504 if (getParser().parseIdentifier(Name))
505 return TokError("expected identifier in directive");
506
507 // Look up symbol.
508 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
509
510 if (Sym->isDefined())
511 return TokError(".alt_entry must preceed symbol definition");
512
513 if (!getStreamer().emitSymbolAttribute(Sym, MCSA_AltEntry))
514 return TokError("unable to emit symbol attribute");
515
516 Lex();
517 return false;
518 }
519
520 /// parseDirectiveDesc
521 /// ::= .desc identifier , expression
parseDirectiveDesc(StringRef,SMLoc)522 bool DarwinAsmParser::parseDirectiveDesc(StringRef, SMLoc) {
523 StringRef Name;
524 if (getParser().parseIdentifier(Name))
525 return TokError("expected identifier in directive");
526
527 // Handle the identifier as the key symbol.
528 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
529
530 if (getLexer().isNot(AsmToken::Comma))
531 return TokError("unexpected token in '.desc' directive");
532 Lex();
533
534 int64_t DescValue;
535 if (getParser().parseAbsoluteExpression(DescValue))
536 return true;
537
538 if (getLexer().isNot(AsmToken::EndOfStatement))
539 return TokError("unexpected token in '.desc' directive");
540
541 Lex();
542
543 // Set the n_desc field of this Symbol to this DescValue
544 getStreamer().emitSymbolDesc(Sym, DescValue);
545
546 return false;
547 }
548
549 /// parseDirectiveIndirectSymbol
550 /// ::= .indirect_symbol identifier
parseDirectiveIndirectSymbol(StringRef,SMLoc Loc)551 bool DarwinAsmParser::parseDirectiveIndirectSymbol(StringRef, SMLoc Loc) {
552 const MCSectionMachO *Current = static_cast<const MCSectionMachO *>(
553 getStreamer().getCurrentSectionOnly());
554 MachO::SectionType SectionType = Current->getType();
555 if (SectionType != MachO::S_NON_LAZY_SYMBOL_POINTERS &&
556 SectionType != MachO::S_LAZY_SYMBOL_POINTERS &&
557 SectionType != MachO::S_THREAD_LOCAL_VARIABLE_POINTERS &&
558 SectionType != MachO::S_SYMBOL_STUBS)
559 return Error(Loc, "indirect symbol not in a symbol pointer or stub "
560 "section");
561
562 StringRef Name;
563 if (getParser().parseIdentifier(Name))
564 return TokError("expected identifier in .indirect_symbol directive");
565
566 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
567
568 // Assembler local symbols don't make any sense here. Complain loudly.
569 if (Sym->isTemporary())
570 return TokError("non-local symbol required in directive");
571
572 if (!getStreamer().emitSymbolAttribute(Sym, MCSA_IndirectSymbol))
573 return TokError("unable to emit indirect symbol attribute for: " + Name);
574
575 if (getLexer().isNot(AsmToken::EndOfStatement))
576 return TokError("unexpected token in '.indirect_symbol' directive");
577
578 Lex();
579
580 return false;
581 }
582
583 /// parseDirectiveDumpOrLoad
584 /// ::= ( .dump | .load ) "filename"
parseDirectiveDumpOrLoad(StringRef Directive,SMLoc IDLoc)585 bool DarwinAsmParser::parseDirectiveDumpOrLoad(StringRef Directive,
586 SMLoc IDLoc) {
587 bool IsDump = Directive == ".dump";
588 if (getLexer().isNot(AsmToken::String))
589 return TokError("expected string in '.dump' or '.load' directive");
590
591 Lex();
592
593 if (getLexer().isNot(AsmToken::EndOfStatement))
594 return TokError("unexpected token in '.dump' or '.load' directive");
595
596 Lex();
597
598 // FIXME: If/when .dump and .load are implemented they will be done in the
599 // the assembly parser and not have any need for an MCStreamer API.
600 if (IsDump)
601 return Warning(IDLoc, "ignoring directive .dump for now");
602 else
603 return Warning(IDLoc, "ignoring directive .load for now");
604 }
605
606 /// ParseDirectiveLinkerOption
607 /// ::= .linker_option "string" ( , "string" )*
parseDirectiveLinkerOption(StringRef IDVal,SMLoc)608 bool DarwinAsmParser::parseDirectiveLinkerOption(StringRef IDVal, SMLoc) {
609 SmallVector<std::string, 4> Args;
610 while (true) {
611 if (getLexer().isNot(AsmToken::String))
612 return TokError("expected string in '" + Twine(IDVal) + "' directive");
613
614 std::string Data;
615 if (getParser().parseEscapedString(Data))
616 return true;
617
618 Args.push_back(Data);
619
620 if (getLexer().is(AsmToken::EndOfStatement))
621 break;
622
623 if (getLexer().isNot(AsmToken::Comma))
624 return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
625 Lex();
626 }
627
628 getStreamer().emitLinkerOptions(Args);
629 return false;
630 }
631
632 /// parseDirectiveLsym
633 /// ::= .lsym identifier , expression
parseDirectiveLsym(StringRef,SMLoc)634 bool DarwinAsmParser::parseDirectiveLsym(StringRef, SMLoc) {
635 StringRef Name;
636 if (getParser().parseIdentifier(Name))
637 return TokError("expected identifier in directive");
638
639 // Handle the identifier as the key symbol.
640 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
641
642 if (getLexer().isNot(AsmToken::Comma))
643 return TokError("unexpected token in '.lsym' directive");
644 Lex();
645
646 const MCExpr *Value;
647 if (getParser().parseExpression(Value))
648 return true;
649
650 if (getLexer().isNot(AsmToken::EndOfStatement))
651 return TokError("unexpected token in '.lsym' directive");
652
653 Lex();
654
655 // We don't currently support this directive.
656 //
657 // FIXME: Diagnostic location!
658 (void) Sym;
659 return TokError("directive '.lsym' is unsupported");
660 }
661
662 /// parseDirectiveSection:
663 /// ::= .section identifier (',' identifier)*
parseDirectiveSection(StringRef,SMLoc)664 bool DarwinAsmParser::parseDirectiveSection(StringRef, SMLoc) {
665 SMLoc Loc = getLexer().getLoc();
666
667 StringRef SectionName;
668 if (getParser().parseIdentifier(SectionName))
669 return Error(Loc, "expected identifier after '.section' directive");
670
671 // Verify there is a following comma.
672 if (!getLexer().is(AsmToken::Comma))
673 return TokError("unexpected token in '.section' directive");
674
675 std::string SectionSpec = std::string(SectionName);
676 SectionSpec += ",";
677
678 // Add all the tokens until the end of the line, ParseSectionSpecifier will
679 // handle this.
680 StringRef EOL = getLexer().LexUntilEndOfStatement();
681 SectionSpec.append(EOL.begin(), EOL.end());
682
683 Lex();
684 if (getLexer().isNot(AsmToken::EndOfStatement))
685 return TokError("unexpected token in '.section' directive");
686 Lex();
687
688 StringRef Segment, Section;
689 unsigned StubSize;
690 unsigned TAA;
691 bool TAAParsed;
692 std::string ErrorStr =
693 MCSectionMachO::ParseSectionSpecifier(SectionSpec, Segment, Section,
694 TAA, TAAParsed, StubSize);
695
696 if (!ErrorStr.empty())
697 return Error(Loc, ErrorStr);
698
699 // Issue a warning if the target is not powerpc and Section is a *coal* section.
700 Triple TT = getParser().getContext().getObjectFileInfo()->getTargetTriple();
701 Triple::ArchType ArchTy = TT.getArch();
702
703 if (ArchTy != Triple::ppc && ArchTy != Triple::ppc64) {
704 StringRef NonCoalSection = StringSwitch<StringRef>(Section)
705 .Case("__textcoal_nt", "__text")
706 .Case("__const_coal", "__const")
707 .Case("__datacoal_nt", "__data")
708 .Default(Section);
709
710 if (!Section.equals(NonCoalSection)) {
711 StringRef SectionVal(Loc.getPointer());
712 size_t B = SectionVal.find(',') + 1, E = SectionVal.find(',', B);
713 SMLoc BLoc = SMLoc::getFromPointer(SectionVal.data() + B);
714 SMLoc ELoc = SMLoc::getFromPointer(SectionVal.data() + E);
715 getParser().Warning(Loc, "section \"" + Section + "\" is deprecated",
716 SMRange(BLoc, ELoc));
717 getParser().Note(Loc, "change section name to \"" + NonCoalSection +
718 "\"", SMRange(BLoc, ELoc));
719 }
720 }
721
722 // FIXME: Arch specific.
723 bool isText = Segment == "__TEXT"; // FIXME: Hack.
724 getStreamer().SwitchSection(getContext().getMachOSection(
725 Segment, Section, TAA, StubSize,
726 isText ? SectionKind::getText() : SectionKind::getData()));
727 return false;
728 }
729
730 /// ParseDirectivePushSection:
731 /// ::= .pushsection identifier (',' identifier)*
parseDirectivePushSection(StringRef S,SMLoc Loc)732 bool DarwinAsmParser::parseDirectivePushSection(StringRef S, SMLoc Loc) {
733 getStreamer().PushSection();
734
735 if (parseDirectiveSection(S, Loc)) {
736 getStreamer().PopSection();
737 return true;
738 }
739
740 return false;
741 }
742
743 /// ParseDirectivePopSection:
744 /// ::= .popsection
parseDirectivePopSection(StringRef,SMLoc)745 bool DarwinAsmParser::parseDirectivePopSection(StringRef, SMLoc) {
746 if (!getStreamer().PopSection())
747 return TokError(".popsection without corresponding .pushsection");
748 return false;
749 }
750
751 /// ParseDirectivePrevious:
752 /// ::= .previous
parseDirectivePrevious(StringRef DirName,SMLoc)753 bool DarwinAsmParser::parseDirectivePrevious(StringRef DirName, SMLoc) {
754 MCSectionSubPair PreviousSection = getStreamer().getPreviousSection();
755 if (!PreviousSection.first)
756 return TokError(".previous without corresponding .section");
757 getStreamer().SwitchSection(PreviousSection.first, PreviousSection.second);
758 return false;
759 }
760
761 /// ParseDirectiveSecureLogUnique
762 /// ::= .secure_log_unique ... message ...
parseDirectiveSecureLogUnique(StringRef,SMLoc IDLoc)763 bool DarwinAsmParser::parseDirectiveSecureLogUnique(StringRef, SMLoc IDLoc) {
764 StringRef LogMessage = getParser().parseStringToEndOfStatement();
765 if (getLexer().isNot(AsmToken::EndOfStatement))
766 return TokError("unexpected token in '.secure_log_unique' directive");
767
768 if (getContext().getSecureLogUsed())
769 return Error(IDLoc, ".secure_log_unique specified multiple times");
770
771 // Get the secure log path.
772 const char *SecureLogFile = getContext().getSecureLogFile();
773 if (!SecureLogFile)
774 return Error(IDLoc, ".secure_log_unique used but AS_SECURE_LOG_FILE "
775 "environment variable unset.");
776
777 // Open the secure log file if we haven't already.
778 raw_fd_ostream *OS = getContext().getSecureLog();
779 if (!OS) {
780 std::error_code EC;
781 auto NewOS = std::make_unique<raw_fd_ostream>(
782 StringRef(SecureLogFile), EC, sys::fs::OF_Append | sys::fs::OF_Text);
783 if (EC)
784 return Error(IDLoc, Twine("can't open secure log file: ") +
785 SecureLogFile + " (" + EC.message() + ")");
786 OS = NewOS.get();
787 getContext().setSecureLog(std::move(NewOS));
788 }
789
790 // Write the message.
791 unsigned CurBuf = getSourceManager().FindBufferContainingLoc(IDLoc);
792 *OS << getSourceManager().getBufferInfo(CurBuf).Buffer->getBufferIdentifier()
793 << ":" << getSourceManager().FindLineNumber(IDLoc, CurBuf) << ":"
794 << LogMessage + "\n";
795
796 getContext().setSecureLogUsed(true);
797
798 return false;
799 }
800
801 /// ParseDirectiveSecureLogReset
802 /// ::= .secure_log_reset
parseDirectiveSecureLogReset(StringRef,SMLoc IDLoc)803 bool DarwinAsmParser::parseDirectiveSecureLogReset(StringRef, SMLoc IDLoc) {
804 if (getLexer().isNot(AsmToken::EndOfStatement))
805 return TokError("unexpected token in '.secure_log_reset' directive");
806
807 Lex();
808
809 getContext().setSecureLogUsed(false);
810
811 return false;
812 }
813
814 /// parseDirectiveSubsectionsViaSymbols
815 /// ::= .subsections_via_symbols
parseDirectiveSubsectionsViaSymbols(StringRef,SMLoc)816 bool DarwinAsmParser::parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc) {
817 if (getLexer().isNot(AsmToken::EndOfStatement))
818 return TokError("unexpected token in '.subsections_via_symbols' directive");
819
820 Lex();
821
822 getStreamer().emitAssemblerFlag(MCAF_SubsectionsViaSymbols);
823
824 return false;
825 }
826
827 /// ParseDirectiveTBSS
828 /// ::= .tbss identifier, size, align
parseDirectiveTBSS(StringRef,SMLoc)829 bool DarwinAsmParser::parseDirectiveTBSS(StringRef, SMLoc) {
830 SMLoc IDLoc = getLexer().getLoc();
831 StringRef Name;
832 if (getParser().parseIdentifier(Name))
833 return TokError("expected identifier in directive");
834
835 // Handle the identifier as the key symbol.
836 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
837
838 if (getLexer().isNot(AsmToken::Comma))
839 return TokError("unexpected token in directive");
840 Lex();
841
842 int64_t Size;
843 SMLoc SizeLoc = getLexer().getLoc();
844 if (getParser().parseAbsoluteExpression(Size))
845 return true;
846
847 int64_t Pow2Alignment = 0;
848 SMLoc Pow2AlignmentLoc;
849 if (getLexer().is(AsmToken::Comma)) {
850 Lex();
851 Pow2AlignmentLoc = getLexer().getLoc();
852 if (getParser().parseAbsoluteExpression(Pow2Alignment))
853 return true;
854 }
855
856 if (getLexer().isNot(AsmToken::EndOfStatement))
857 return TokError("unexpected token in '.tbss' directive");
858
859 Lex();
860
861 if (Size < 0)
862 return Error(SizeLoc, "invalid '.tbss' directive size, can't be less than"
863 "zero");
864
865 // FIXME: Diagnose overflow.
866 if (Pow2Alignment < 0)
867 return Error(Pow2AlignmentLoc, "invalid '.tbss' alignment, can't be less"
868 "than zero");
869
870 if (!Sym->isUndefined())
871 return Error(IDLoc, "invalid symbol redefinition");
872
873 getStreamer().emitTBSSSymbol(
874 getContext().getMachOSection("__DATA", "__thread_bss",
875 MachO::S_THREAD_LOCAL_ZEROFILL, 0,
876 SectionKind::getThreadBSS()),
877 Sym, Size, 1 << Pow2Alignment);
878
879 return false;
880 }
881
882 /// ParseDirectiveZerofill
883 /// ::= .zerofill segname , sectname [, identifier , size_expression [
884 /// , align_expression ]]
parseDirectiveZerofill(StringRef,SMLoc)885 bool DarwinAsmParser::parseDirectiveZerofill(StringRef, SMLoc) {
886 StringRef Segment;
887 if (getParser().parseIdentifier(Segment))
888 return TokError("expected segment name after '.zerofill' directive");
889
890 if (getLexer().isNot(AsmToken::Comma))
891 return TokError("unexpected token in directive");
892 Lex();
893
894 StringRef Section;
895 SMLoc SectionLoc = getLexer().getLoc();
896 if (getParser().parseIdentifier(Section))
897 return TokError("expected section name after comma in '.zerofill' "
898 "directive");
899
900 // If this is the end of the line all that was wanted was to create the
901 // the section but with no symbol.
902 if (getLexer().is(AsmToken::EndOfStatement)) {
903 // Create the zerofill section but no symbol
904 getStreamer().emitZerofill(
905 getContext().getMachOSection(Segment, Section, MachO::S_ZEROFILL, 0,
906 SectionKind::getBSS()),
907 /*Symbol=*/nullptr, /*Size=*/0, /*ByteAlignment=*/0, SectionLoc);
908 return false;
909 }
910
911 if (getLexer().isNot(AsmToken::Comma))
912 return TokError("unexpected token in directive");
913 Lex();
914
915 SMLoc IDLoc = getLexer().getLoc();
916 StringRef IDStr;
917 if (getParser().parseIdentifier(IDStr))
918 return TokError("expected identifier in directive");
919
920 // handle the identifier as the key symbol.
921 MCSymbol *Sym = getContext().getOrCreateSymbol(IDStr);
922
923 if (getLexer().isNot(AsmToken::Comma))
924 return TokError("unexpected token in directive");
925 Lex();
926
927 int64_t Size;
928 SMLoc SizeLoc = getLexer().getLoc();
929 if (getParser().parseAbsoluteExpression(Size))
930 return true;
931
932 int64_t Pow2Alignment = 0;
933 SMLoc Pow2AlignmentLoc;
934 if (getLexer().is(AsmToken::Comma)) {
935 Lex();
936 Pow2AlignmentLoc = getLexer().getLoc();
937 if (getParser().parseAbsoluteExpression(Pow2Alignment))
938 return true;
939 }
940
941 if (getLexer().isNot(AsmToken::EndOfStatement))
942 return TokError("unexpected token in '.zerofill' directive");
943
944 Lex();
945
946 if (Size < 0)
947 return Error(SizeLoc, "invalid '.zerofill' directive size, can't be less "
948 "than zero");
949
950 // NOTE: The alignment in the directive is a power of 2 value, the assembler
951 // may internally end up wanting an alignment in bytes.
952 // FIXME: Diagnose overflow.
953 if (Pow2Alignment < 0)
954 return Error(Pow2AlignmentLoc, "invalid '.zerofill' directive alignment, "
955 "can't be less than zero");
956
957 if (!Sym->isUndefined())
958 return Error(IDLoc, "invalid symbol redefinition");
959
960 // Create the zerofill Symbol with Size and Pow2Alignment
961 //
962 // FIXME: Arch specific.
963 getStreamer().emitZerofill(getContext().getMachOSection(
964 Segment, Section, MachO::S_ZEROFILL,
965 0, SectionKind::getBSS()),
966 Sym, Size, 1 << Pow2Alignment, SectionLoc);
967
968 return false;
969 }
970
971 /// ParseDirectiveDataRegion
972 /// ::= .data_region [ ( jt8 | jt16 | jt32 ) ]
parseDirectiveDataRegion(StringRef,SMLoc)973 bool DarwinAsmParser::parseDirectiveDataRegion(StringRef, SMLoc) {
974 if (getLexer().is(AsmToken::EndOfStatement)) {
975 Lex();
976 getStreamer().emitDataRegion(MCDR_DataRegion);
977 return false;
978 }
979 StringRef RegionType;
980 SMLoc Loc = getParser().getTok().getLoc();
981 if (getParser().parseIdentifier(RegionType))
982 return TokError("expected region type after '.data_region' directive");
983 int Kind = StringSwitch<int>(RegionType)
984 .Case("jt8", MCDR_DataRegionJT8)
985 .Case("jt16", MCDR_DataRegionJT16)
986 .Case("jt32", MCDR_DataRegionJT32)
987 .Default(-1);
988 if (Kind == -1)
989 return Error(Loc, "unknown region type in '.data_region' directive");
990 Lex();
991
992 getStreamer().emitDataRegion((MCDataRegionType)Kind);
993 return false;
994 }
995
996 /// ParseDirectiveDataRegionEnd
997 /// ::= .end_data_region
parseDirectiveDataRegionEnd(StringRef,SMLoc)998 bool DarwinAsmParser::parseDirectiveDataRegionEnd(StringRef, SMLoc) {
999 if (getLexer().isNot(AsmToken::EndOfStatement))
1000 return TokError("unexpected token in '.end_data_region' directive");
1001
1002 Lex();
1003 getStreamer().emitDataRegion(MCDR_DataRegionEnd);
1004 return false;
1005 }
1006
isSDKVersionToken(const AsmToken & Tok)1007 static bool isSDKVersionToken(const AsmToken &Tok) {
1008 return Tok.is(AsmToken::Identifier) && Tok.getIdentifier() == "sdk_version";
1009 }
1010
1011 /// parseMajorMinorVersionComponent ::= major, minor
parseMajorMinorVersionComponent(unsigned * Major,unsigned * Minor,const char * VersionName)1012 bool DarwinAsmParser::parseMajorMinorVersionComponent(unsigned *Major,
1013 unsigned *Minor,
1014 const char *VersionName) {
1015 // Get the major version number.
1016 if (getLexer().isNot(AsmToken::Integer))
1017 return TokError(Twine("invalid ") + VersionName +
1018 " major version number, integer expected");
1019 int64_t MajorVal = getLexer().getTok().getIntVal();
1020 if (MajorVal > 65535 || MajorVal <= 0)
1021 return TokError(Twine("invalid ") + VersionName + " major version number");
1022 *Major = (unsigned)MajorVal;
1023 Lex();
1024 if (getLexer().isNot(AsmToken::Comma))
1025 return TokError(Twine(VersionName) +
1026 " minor version number required, comma expected");
1027 Lex();
1028 // Get the minor version number.
1029 if (getLexer().isNot(AsmToken::Integer))
1030 return TokError(Twine("invalid ") + VersionName +
1031 " minor version number, integer expected");
1032 int64_t MinorVal = getLexer().getTok().getIntVal();
1033 if (MinorVal > 255 || MinorVal < 0)
1034 return TokError(Twine("invalid ") + VersionName + " minor version number");
1035 *Minor = MinorVal;
1036 Lex();
1037 return false;
1038 }
1039
1040 /// parseOptionalTrailingVersionComponent ::= , version_number
parseOptionalTrailingVersionComponent(unsigned * Component,const char * ComponentName)1041 bool DarwinAsmParser::parseOptionalTrailingVersionComponent(
1042 unsigned *Component, const char *ComponentName) {
1043 assert(getLexer().is(AsmToken::Comma) && "comma expected");
1044 Lex();
1045 if (getLexer().isNot(AsmToken::Integer))
1046 return TokError(Twine("invalid ") + ComponentName +
1047 " version number, integer expected");
1048 int64_t Val = getLexer().getTok().getIntVal();
1049 if (Val > 255 || Val < 0)
1050 return TokError(Twine("invalid ") + ComponentName + " version number");
1051 *Component = Val;
1052 Lex();
1053 return false;
1054 }
1055
1056 /// parseVersion ::= parseMajorMinorVersionComponent
1057 /// parseOptionalTrailingVersionComponent
parseVersion(unsigned * Major,unsigned * Minor,unsigned * Update)1058 bool DarwinAsmParser::parseVersion(unsigned *Major, unsigned *Minor,
1059 unsigned *Update) {
1060 if (parseMajorMinorVersionComponent(Major, Minor, "OS"))
1061 return true;
1062
1063 // Get the update level, if specified
1064 *Update = 0;
1065 if (getLexer().is(AsmToken::EndOfStatement) ||
1066 isSDKVersionToken(getLexer().getTok()))
1067 return false;
1068 if (getLexer().isNot(AsmToken::Comma))
1069 return TokError("invalid OS update specifier, comma expected");
1070 if (parseOptionalTrailingVersionComponent(Update, "OS update"))
1071 return true;
1072 return false;
1073 }
1074
parseSDKVersion(VersionTuple & SDKVersion)1075 bool DarwinAsmParser::parseSDKVersion(VersionTuple &SDKVersion) {
1076 assert(isSDKVersionToken(getLexer().getTok()) && "expected sdk_version");
1077 Lex();
1078 unsigned Major, Minor;
1079 if (parseMajorMinorVersionComponent(&Major, &Minor, "SDK"))
1080 return true;
1081 SDKVersion = VersionTuple(Major, Minor);
1082
1083 // Get the subminor version, if specified.
1084 if (getLexer().is(AsmToken::Comma)) {
1085 unsigned Subminor;
1086 if (parseOptionalTrailingVersionComponent(&Subminor, "SDK subminor"))
1087 return true;
1088 SDKVersion = VersionTuple(Major, Minor, Subminor);
1089 }
1090 return false;
1091 }
1092
checkVersion(StringRef Directive,StringRef Arg,SMLoc Loc,Triple::OSType ExpectedOS)1093 void DarwinAsmParser::checkVersion(StringRef Directive, StringRef Arg,
1094 SMLoc Loc, Triple::OSType ExpectedOS) {
1095 const Triple &Target = getContext().getObjectFileInfo()->getTargetTriple();
1096 if (Target.getOS() != ExpectedOS)
1097 Warning(Loc, Twine(Directive) +
1098 (Arg.empty() ? Twine() : Twine(' ') + Arg) +
1099 " used while targeting " + Target.getOSName());
1100
1101 if (LastVersionDirective.isValid()) {
1102 Warning(Loc, "overriding previous version directive");
1103 Note(LastVersionDirective, "previous definition is here");
1104 }
1105 LastVersionDirective = Loc;
1106 }
1107
getOSTypeFromMCVM(MCVersionMinType Type)1108 static Triple::OSType getOSTypeFromMCVM(MCVersionMinType Type) {
1109 switch (Type) {
1110 case MCVM_WatchOSVersionMin: return Triple::WatchOS;
1111 case MCVM_TvOSVersionMin: return Triple::TvOS;
1112 case MCVM_IOSVersionMin: return Triple::IOS;
1113 case MCVM_OSXVersionMin: return Triple::MacOSX;
1114 }
1115 llvm_unreachable("Invalid mc version min type");
1116 }
1117
1118 /// parseVersionMin
1119 /// ::= .ios_version_min parseVersion parseSDKVersion
1120 /// | .macosx_version_min parseVersion parseSDKVersion
1121 /// | .tvos_version_min parseVersion parseSDKVersion
1122 /// | .watchos_version_min parseVersion parseSDKVersion
parseVersionMin(StringRef Directive,SMLoc Loc,MCVersionMinType Type)1123 bool DarwinAsmParser::parseVersionMin(StringRef Directive, SMLoc Loc,
1124 MCVersionMinType Type) {
1125 unsigned Major;
1126 unsigned Minor;
1127 unsigned Update;
1128 if (parseVersion(&Major, &Minor, &Update))
1129 return true;
1130
1131 VersionTuple SDKVersion;
1132 if (isSDKVersionToken(getLexer().getTok()) && parseSDKVersion(SDKVersion))
1133 return true;
1134
1135 if (parseToken(AsmToken::EndOfStatement))
1136 return addErrorSuffix(Twine(" in '") + Directive + "' directive");
1137
1138 Triple::OSType ExpectedOS = getOSTypeFromMCVM(Type);
1139 checkVersion(Directive, StringRef(), Loc, ExpectedOS);
1140 getStreamer().emitVersionMin(Type, Major, Minor, Update, SDKVersion);
1141 return false;
1142 }
1143
getOSTypeFromPlatform(MachO::PlatformType Type)1144 static Triple::OSType getOSTypeFromPlatform(MachO::PlatformType Type) {
1145 switch (Type) {
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_BRIDGEOS: /* silence warning */ break;
1151 case MachO::PLATFORM_MACCATALYST: return Triple::IOS;
1152 case MachO::PLATFORM_IOSSIMULATOR: /* silence warning */ break;
1153 case MachO::PLATFORM_TVOSSIMULATOR: /* silence warning */ break;
1154 case MachO::PLATFORM_WATCHOSSIMULATOR: /* silence warning */ break;
1155 case MachO::PLATFORM_DRIVERKIT: /* silence warning */ break;
1156 }
1157 llvm_unreachable("Invalid mach-o platform type");
1158 }
1159
1160 /// parseBuildVersion
1161 /// ::= .build_version (macos|ios|tvos|watchos), parseVersion parseSDKVersion
parseBuildVersion(StringRef Directive,SMLoc Loc)1162 bool DarwinAsmParser::parseBuildVersion(StringRef Directive, SMLoc Loc) {
1163 StringRef PlatformName;
1164 SMLoc PlatformLoc = getTok().getLoc();
1165 if (getParser().parseIdentifier(PlatformName))
1166 return TokError("platform name expected");
1167
1168 unsigned Platform = StringSwitch<unsigned>(PlatformName)
1169 .Case("macos", MachO::PLATFORM_MACOS)
1170 .Case("ios", MachO::PLATFORM_IOS)
1171 .Case("tvos", MachO::PLATFORM_TVOS)
1172 .Case("watchos", MachO::PLATFORM_WATCHOS)
1173 .Case("macCatalyst", MachO::PLATFORM_MACCATALYST)
1174 .Default(0);
1175 if (Platform == 0)
1176 return Error(PlatformLoc, "unknown platform name");
1177
1178 if (getLexer().isNot(AsmToken::Comma))
1179 return TokError("version number required, comma expected");
1180 Lex();
1181
1182 unsigned Major;
1183 unsigned Minor;
1184 unsigned Update;
1185 if (parseVersion(&Major, &Minor, &Update))
1186 return true;
1187
1188 VersionTuple SDKVersion;
1189 if (isSDKVersionToken(getLexer().getTok()) && parseSDKVersion(SDKVersion))
1190 return true;
1191
1192 if (parseToken(AsmToken::EndOfStatement))
1193 return addErrorSuffix(" in '.build_version' directive");
1194
1195 Triple::OSType ExpectedOS
1196 = getOSTypeFromPlatform((MachO::PlatformType)Platform);
1197 checkVersion(Directive, PlatformName, Loc, ExpectedOS);
1198 getStreamer().emitBuildVersion(Platform, Major, Minor, Update, SDKVersion);
1199 return false;
1200 }
1201
1202
1203 namespace llvm {
1204
createDarwinAsmParser()1205 MCAsmParserExtension *createDarwinAsmParser() {
1206 return new DarwinAsmParser;
1207 }
1208
1209 } // end llvm namespace
1210