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/Error.h"
27 #include "llvm/Support/FileSystem.h"
28 #include "llvm/Support/MemoryBuffer.h"
29 #include "llvm/Support/SMLoc.h"
30 #include "llvm/Support/SourceMgr.h"
31 #include "llvm/Support/raw_ostream.h"
32 #include <algorithm>
33 #include <cstddef>
34 #include <cstdint>
35 #include <string>
36 #include <system_error>
37 #include <utility>
38
39 using namespace llvm;
40
41 namespace {
42
43 /// Implementation of directive handling which is shared across all
44 /// Darwin targets.
45 class DarwinAsmParser : public MCAsmParserExtension {
46 template<bool (DarwinAsmParser::*HandlerMethod)(StringRef, SMLoc)>
addDirectiveHandler(StringRef Directive)47 void addDirectiveHandler(StringRef Directive) {
48 MCAsmParser::ExtensionDirectiveHandler Handler = std::make_pair(
49 this, HandleDirective<DarwinAsmParser, HandlerMethod>);
50 getParser().addDirectiveHandler(Directive, Handler);
51 }
52
53 bool parseSectionSwitch(StringRef Segment, StringRef Section,
54 unsigned TAA = 0, unsigned ImplicitAlign = 0,
55 unsigned StubSize = 0);
56
57 SMLoc LastVersionDirective;
58
59 public:
60 DarwinAsmParser() = default;
61
Initialize(MCAsmParser & Parser)62 void Initialize(MCAsmParser &Parser) override {
63 // Call the base implementation.
64 this->MCAsmParserExtension::Initialize(Parser);
65
66 addDirectiveHandler<&DarwinAsmParser::parseDirectiveAltEntry>(".alt_entry");
67 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDesc>(".desc");
68 addDirectiveHandler<&DarwinAsmParser::parseDirectiveIndirectSymbol>(
69 ".indirect_symbol");
70 addDirectiveHandler<&DarwinAsmParser::parseDirectiveLsym>(".lsym");
71 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSubsectionsViaSymbols>(
72 ".subsections_via_symbols");
73 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".dump");
74 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".load");
75 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSection>(".section");
76 addDirectiveHandler<&DarwinAsmParser::parseDirectivePushSection>(
77 ".pushsection");
78 addDirectiveHandler<&DarwinAsmParser::parseDirectivePopSection>(
79 ".popsection");
80 addDirectiveHandler<&DarwinAsmParser::parseDirectivePrevious>(".previous");
81 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogUnique>(
82 ".secure_log_unique");
83 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogReset>(
84 ".secure_log_reset");
85 addDirectiveHandler<&DarwinAsmParser::parseDirectiveTBSS>(".tbss");
86 addDirectiveHandler<&DarwinAsmParser::parseDirectiveZerofill>(".zerofill");
87
88 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegion>(
89 ".data_region");
90 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegionEnd>(
91 ".end_data_region");
92
93 // Special section directives.
94 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveBss>(".bss");
95 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConst>(".const");
96 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstData>(
97 ".const_data");
98 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstructor>(
99 ".constructor");
100 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveCString>(
101 ".cstring");
102 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveData>(".data");
103 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDestructor>(
104 ".destructor");
105 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDyld>(".dyld");
106 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit0>(
107 ".fvmlib_init0");
108 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit1>(
109 ".fvmlib_init1");
110 addDirectiveHandler<
111 &DarwinAsmParser::parseSectionDirectiveLazySymbolPointers>(
112 ".lazy_symbol_pointer");
113 addDirectiveHandler<&DarwinAsmParser::parseDirectiveLinkerOption>(
114 ".linker_option");
115 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral16>(
116 ".literal16");
117 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral4>(
118 ".literal4");
119 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral8>(
120 ".literal8");
121 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModInitFunc>(
122 ".mod_init_func");
123 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModTermFunc>(
124 ".mod_term_func");
125 addDirectiveHandler<
126 &DarwinAsmParser::parseSectionDirectiveNonLazySymbolPointers>(
127 ".non_lazy_symbol_pointer");
128 addDirectiveHandler<
129 &DarwinAsmParser::parseSectionDirectiveThreadLocalVariablePointers>(
130 ".thread_local_variable_pointer");
131 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatClsMeth>(
132 ".objc_cat_cls_meth");
133 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatInstMeth>(
134 ".objc_cat_inst_meth");
135 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCategory>(
136 ".objc_category");
137 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClass>(
138 ".objc_class");
139 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassNames>(
140 ".objc_class_names");
141 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassVars>(
142 ".objc_class_vars");
143 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsMeth>(
144 ".objc_cls_meth");
145 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsRefs>(
146 ".objc_cls_refs");
147 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCInstMeth>(
148 ".objc_inst_meth");
149 addDirectiveHandler<
150 &DarwinAsmParser::parseSectionDirectiveObjCInstanceVars>(
151 ".objc_instance_vars");
152 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMessageRefs>(
153 ".objc_message_refs");
154 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMetaClass>(
155 ".objc_meta_class");
156 addDirectiveHandler<
157 &DarwinAsmParser::parseSectionDirectiveObjCMethVarNames>(
158 ".objc_meth_var_names");
159 addDirectiveHandler<
160 &DarwinAsmParser::parseSectionDirectiveObjCMethVarTypes>(
161 ".objc_meth_var_types");
162 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCModuleInfo>(
163 ".objc_module_info");
164 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCProtocol>(
165 ".objc_protocol");
166 addDirectiveHandler<
167 &DarwinAsmParser::parseSectionDirectiveObjCSelectorStrs>(
168 ".objc_selector_strs");
169 addDirectiveHandler<
170 &DarwinAsmParser::parseSectionDirectiveObjCStringObject>(
171 ".objc_string_object");
172 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCSymbols>(
173 ".objc_symbols");
174 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectivePICSymbolStub>(
175 ".picsymbol_stub");
176 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticConst>(
177 ".static_const");
178 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticData>(
179 ".static_data");
180 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveSymbolStub>(
181 ".symbol_stub");
182 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTData>(".tdata");
183 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveText>(".text");
184 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveThreadInitFunc>(
185 ".thread_init_func");
186 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTLV>(".tlv");
187
188 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveIdent>(".ident");
189 addDirectiveHandler<&DarwinAsmParser::parseWatchOSVersionMin>(
190 ".watchos_version_min");
191 addDirectiveHandler<&DarwinAsmParser::parseTvOSVersionMin>(
192 ".tvos_version_min");
193 addDirectiveHandler<&DarwinAsmParser::parseIOSVersionMin>(
194 ".ios_version_min");
195 addDirectiveHandler<&DarwinAsmParser::parseMacOSXVersionMin>(
196 ".macosx_version_min");
197 addDirectiveHandler<&DarwinAsmParser::parseBuildVersion>(".build_version");
198
199 LastVersionDirective = SMLoc();
200 }
201
202 bool parseDirectiveAltEntry(StringRef, SMLoc);
203 bool parseDirectiveDesc(StringRef, SMLoc);
204 bool parseDirectiveIndirectSymbol(StringRef, SMLoc);
205 bool parseDirectiveDumpOrLoad(StringRef, SMLoc);
206 bool parseDirectiveLsym(StringRef, SMLoc);
207 bool parseDirectiveLinkerOption(StringRef, SMLoc);
208 bool parseDirectiveSection(StringRef, SMLoc);
209 bool parseDirectivePushSection(StringRef, SMLoc);
210 bool parseDirectivePopSection(StringRef, SMLoc);
211 bool parseDirectivePrevious(StringRef, SMLoc);
212 bool parseDirectiveSecureLogReset(StringRef, SMLoc);
213 bool parseDirectiveSecureLogUnique(StringRef, SMLoc);
214 bool parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc);
215 bool parseDirectiveTBSS(StringRef, SMLoc);
216 bool parseDirectiveZerofill(StringRef, SMLoc);
217 bool parseDirectiveDataRegion(StringRef, SMLoc);
218 bool parseDirectiveDataRegionEnd(StringRef, SMLoc);
219
220 // Named Section Directive
parseSectionDirectiveBss(StringRef,SMLoc)221 bool parseSectionDirectiveBss(StringRef, SMLoc) {
222 return parseSectionSwitch("__DATA", "__bss");
223 }
224
parseSectionDirectiveConst(StringRef,SMLoc)225 bool parseSectionDirectiveConst(StringRef, SMLoc) {
226 return parseSectionSwitch("__TEXT", "__const");
227 }
228
parseSectionDirectiveStaticConst(StringRef,SMLoc)229 bool parseSectionDirectiveStaticConst(StringRef, SMLoc) {
230 return parseSectionSwitch("__TEXT", "__static_const");
231 }
232
parseSectionDirectiveCString(StringRef,SMLoc)233 bool parseSectionDirectiveCString(StringRef, SMLoc) {
234 return parseSectionSwitch("__TEXT","__cstring",
235 MachO::S_CSTRING_LITERALS);
236 }
237
parseSectionDirectiveLiteral4(StringRef,SMLoc)238 bool parseSectionDirectiveLiteral4(StringRef, SMLoc) {
239 return parseSectionSwitch("__TEXT", "__literal4",
240 MachO::S_4BYTE_LITERALS, 4);
241 }
242
parseSectionDirectiveLiteral8(StringRef,SMLoc)243 bool parseSectionDirectiveLiteral8(StringRef, SMLoc) {
244 return parseSectionSwitch("__TEXT", "__literal8",
245 MachO::S_8BYTE_LITERALS, 8);
246 }
247
parseSectionDirectiveLiteral16(StringRef,SMLoc)248 bool parseSectionDirectiveLiteral16(StringRef, SMLoc) {
249 return parseSectionSwitch("__TEXT","__literal16",
250 MachO::S_16BYTE_LITERALS, 16);
251 }
252
parseSectionDirectiveConstructor(StringRef,SMLoc)253 bool parseSectionDirectiveConstructor(StringRef, SMLoc) {
254 return parseSectionSwitch("__TEXT","__constructor");
255 }
256
parseSectionDirectiveDestructor(StringRef,SMLoc)257 bool parseSectionDirectiveDestructor(StringRef, SMLoc) {
258 return parseSectionSwitch("__TEXT","__destructor");
259 }
260
parseSectionDirectiveFVMLibInit0(StringRef,SMLoc)261 bool parseSectionDirectiveFVMLibInit0(StringRef, SMLoc) {
262 return parseSectionSwitch("__TEXT","__fvmlib_init0");
263 }
264
parseSectionDirectiveFVMLibInit1(StringRef,SMLoc)265 bool parseSectionDirectiveFVMLibInit1(StringRef, SMLoc) {
266 return parseSectionSwitch("__TEXT","__fvmlib_init1");
267 }
268
parseSectionDirectiveSymbolStub(StringRef,SMLoc)269 bool parseSectionDirectiveSymbolStub(StringRef, SMLoc) {
270 return parseSectionSwitch("__TEXT","__symbol_stub",
271 MachO::S_SYMBOL_STUBS |
272 MachO::S_ATTR_PURE_INSTRUCTIONS,
273 // FIXME: Different on PPC and ARM.
274 0, 16);
275 }
276
parseSectionDirectivePICSymbolStub(StringRef,SMLoc)277 bool parseSectionDirectivePICSymbolStub(StringRef, SMLoc) {
278 return parseSectionSwitch("__TEXT","__picsymbol_stub",
279 MachO::S_SYMBOL_STUBS |
280 MachO::S_ATTR_PURE_INSTRUCTIONS, 0, 26);
281 }
282
parseSectionDirectiveData(StringRef,SMLoc)283 bool parseSectionDirectiveData(StringRef, SMLoc) {
284 return parseSectionSwitch("__DATA", "__data");
285 }
286
parseSectionDirectiveStaticData(StringRef,SMLoc)287 bool parseSectionDirectiveStaticData(StringRef, SMLoc) {
288 return parseSectionSwitch("__DATA", "__static_data");
289 }
290
parseSectionDirectiveNonLazySymbolPointers(StringRef,SMLoc)291 bool parseSectionDirectiveNonLazySymbolPointers(StringRef, SMLoc) {
292 return parseSectionSwitch("__DATA", "__nl_symbol_ptr",
293 MachO::S_NON_LAZY_SYMBOL_POINTERS, 4);
294 }
295
parseSectionDirectiveLazySymbolPointers(StringRef,SMLoc)296 bool parseSectionDirectiveLazySymbolPointers(StringRef, SMLoc) {
297 return parseSectionSwitch("__DATA", "__la_symbol_ptr",
298 MachO::S_LAZY_SYMBOL_POINTERS, 4);
299 }
300
parseSectionDirectiveThreadLocalVariablePointers(StringRef,SMLoc)301 bool parseSectionDirectiveThreadLocalVariablePointers(StringRef, SMLoc) {
302 return parseSectionSwitch("__DATA", "__thread_ptr",
303 MachO::S_THREAD_LOCAL_VARIABLE_POINTERS, 4);
304 }
305
parseSectionDirectiveDyld(StringRef,SMLoc)306 bool parseSectionDirectiveDyld(StringRef, SMLoc) {
307 return parseSectionSwitch("__DATA", "__dyld");
308 }
309
parseSectionDirectiveModInitFunc(StringRef,SMLoc)310 bool parseSectionDirectiveModInitFunc(StringRef, SMLoc) {
311 return parseSectionSwitch("__DATA", "__mod_init_func",
312 MachO::S_MOD_INIT_FUNC_POINTERS, 4);
313 }
314
parseSectionDirectiveModTermFunc(StringRef,SMLoc)315 bool parseSectionDirectiveModTermFunc(StringRef, SMLoc) {
316 return parseSectionSwitch("__DATA", "__mod_term_func",
317 MachO::S_MOD_TERM_FUNC_POINTERS, 4);
318 }
319
parseSectionDirectiveConstData(StringRef,SMLoc)320 bool parseSectionDirectiveConstData(StringRef, SMLoc) {
321 return parseSectionSwitch("__DATA", "__const");
322 }
323
parseSectionDirectiveObjCClass(StringRef,SMLoc)324 bool parseSectionDirectiveObjCClass(StringRef, SMLoc) {
325 return parseSectionSwitch("__OBJC", "__class",
326 MachO::S_ATTR_NO_DEAD_STRIP);
327 }
328
parseSectionDirectiveObjCMetaClass(StringRef,SMLoc)329 bool parseSectionDirectiveObjCMetaClass(StringRef, SMLoc) {
330 return parseSectionSwitch("__OBJC", "__meta_class",
331 MachO::S_ATTR_NO_DEAD_STRIP);
332 }
333
parseSectionDirectiveObjCCatClsMeth(StringRef,SMLoc)334 bool parseSectionDirectiveObjCCatClsMeth(StringRef, SMLoc) {
335 return parseSectionSwitch("__OBJC", "__cat_cls_meth",
336 MachO::S_ATTR_NO_DEAD_STRIP);
337 }
338
parseSectionDirectiveObjCCatInstMeth(StringRef,SMLoc)339 bool parseSectionDirectiveObjCCatInstMeth(StringRef, SMLoc) {
340 return parseSectionSwitch("__OBJC", "__cat_inst_meth",
341 MachO::S_ATTR_NO_DEAD_STRIP);
342 }
343
parseSectionDirectiveObjCProtocol(StringRef,SMLoc)344 bool parseSectionDirectiveObjCProtocol(StringRef, SMLoc) {
345 return parseSectionSwitch("__OBJC", "__protocol",
346 MachO::S_ATTR_NO_DEAD_STRIP);
347 }
348
parseSectionDirectiveObjCStringObject(StringRef,SMLoc)349 bool parseSectionDirectiveObjCStringObject(StringRef, SMLoc) {
350 return parseSectionSwitch("__OBJC", "__string_object",
351 MachO::S_ATTR_NO_DEAD_STRIP);
352 }
353
parseSectionDirectiveObjCClsMeth(StringRef,SMLoc)354 bool parseSectionDirectiveObjCClsMeth(StringRef, SMLoc) {
355 return parseSectionSwitch("__OBJC", "__cls_meth",
356 MachO::S_ATTR_NO_DEAD_STRIP);
357 }
358
parseSectionDirectiveObjCInstMeth(StringRef,SMLoc)359 bool parseSectionDirectiveObjCInstMeth(StringRef, SMLoc) {
360 return parseSectionSwitch("__OBJC", "__inst_meth",
361 MachO::S_ATTR_NO_DEAD_STRIP);
362 }
363
parseSectionDirectiveObjCClsRefs(StringRef,SMLoc)364 bool parseSectionDirectiveObjCClsRefs(StringRef, SMLoc) {
365 return parseSectionSwitch("__OBJC", "__cls_refs",
366 MachO::S_ATTR_NO_DEAD_STRIP |
367 MachO::S_LITERAL_POINTERS, 4);
368 }
369
parseSectionDirectiveObjCMessageRefs(StringRef,SMLoc)370 bool parseSectionDirectiveObjCMessageRefs(StringRef, SMLoc) {
371 return parseSectionSwitch("__OBJC", "__message_refs",
372 MachO::S_ATTR_NO_DEAD_STRIP |
373 MachO::S_LITERAL_POINTERS, 4);
374 }
375
parseSectionDirectiveObjCSymbols(StringRef,SMLoc)376 bool parseSectionDirectiveObjCSymbols(StringRef, SMLoc) {
377 return parseSectionSwitch("__OBJC", "__symbols",
378 MachO::S_ATTR_NO_DEAD_STRIP);
379 }
380
parseSectionDirectiveObjCCategory(StringRef,SMLoc)381 bool parseSectionDirectiveObjCCategory(StringRef, SMLoc) {
382 return parseSectionSwitch("__OBJC", "__category",
383 MachO::S_ATTR_NO_DEAD_STRIP);
384 }
385
parseSectionDirectiveObjCClassVars(StringRef,SMLoc)386 bool parseSectionDirectiveObjCClassVars(StringRef, SMLoc) {
387 return parseSectionSwitch("__OBJC", "__class_vars",
388 MachO::S_ATTR_NO_DEAD_STRIP);
389 }
390
parseSectionDirectiveObjCInstanceVars(StringRef,SMLoc)391 bool parseSectionDirectiveObjCInstanceVars(StringRef, SMLoc) {
392 return parseSectionSwitch("__OBJC", "__instance_vars",
393 MachO::S_ATTR_NO_DEAD_STRIP);
394 }
395
parseSectionDirectiveObjCModuleInfo(StringRef,SMLoc)396 bool parseSectionDirectiveObjCModuleInfo(StringRef, SMLoc) {
397 return parseSectionSwitch("__OBJC", "__module_info",
398 MachO::S_ATTR_NO_DEAD_STRIP);
399 }
400
parseSectionDirectiveObjCClassNames(StringRef,SMLoc)401 bool parseSectionDirectiveObjCClassNames(StringRef, SMLoc) {
402 return parseSectionSwitch("__TEXT", "__cstring",
403 MachO::S_CSTRING_LITERALS);
404 }
405
parseSectionDirectiveObjCMethVarTypes(StringRef,SMLoc)406 bool parseSectionDirectiveObjCMethVarTypes(StringRef, SMLoc) {
407 return parseSectionSwitch("__TEXT", "__cstring",
408 MachO::S_CSTRING_LITERALS);
409 }
410
parseSectionDirectiveObjCMethVarNames(StringRef,SMLoc)411 bool parseSectionDirectiveObjCMethVarNames(StringRef, SMLoc) {
412 return parseSectionSwitch("__TEXT", "__cstring",
413 MachO::S_CSTRING_LITERALS);
414 }
415
parseSectionDirectiveObjCSelectorStrs(StringRef,SMLoc)416 bool parseSectionDirectiveObjCSelectorStrs(StringRef, SMLoc) {
417 return parseSectionSwitch("__OBJC", "__selector_strs",
418 MachO::S_CSTRING_LITERALS);
419 }
420
parseSectionDirectiveTData(StringRef,SMLoc)421 bool parseSectionDirectiveTData(StringRef, SMLoc) {
422 return parseSectionSwitch("__DATA", "__thread_data",
423 MachO::S_THREAD_LOCAL_REGULAR);
424 }
425
parseSectionDirectiveText(StringRef,SMLoc)426 bool parseSectionDirectiveText(StringRef, SMLoc) {
427 return parseSectionSwitch("__TEXT", "__text",
428 MachO::S_ATTR_PURE_INSTRUCTIONS);
429 }
430
parseSectionDirectiveTLV(StringRef,SMLoc)431 bool parseSectionDirectiveTLV(StringRef, SMLoc) {
432 return parseSectionSwitch("__DATA", "__thread_vars",
433 MachO::S_THREAD_LOCAL_VARIABLES);
434 }
435
parseSectionDirectiveIdent(StringRef,SMLoc)436 bool parseSectionDirectiveIdent(StringRef, SMLoc) {
437 // Darwin silently ignores the .ident directive.
438 getParser().eatToEndOfStatement();
439 return false;
440 }
441
parseSectionDirectiveThreadInitFunc(StringRef,SMLoc)442 bool parseSectionDirectiveThreadInitFunc(StringRef, SMLoc) {
443 return parseSectionSwitch("__DATA", "__thread_init",
444 MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS);
445 }
446
parseWatchOSVersionMin(StringRef Directive,SMLoc Loc)447 bool parseWatchOSVersionMin(StringRef Directive, SMLoc Loc) {
448 return parseVersionMin(Directive, Loc, MCVM_WatchOSVersionMin);
449 }
parseTvOSVersionMin(StringRef Directive,SMLoc Loc)450 bool parseTvOSVersionMin(StringRef Directive, SMLoc Loc) {
451 return parseVersionMin(Directive, Loc, MCVM_TvOSVersionMin);
452 }
parseIOSVersionMin(StringRef Directive,SMLoc Loc)453 bool parseIOSVersionMin(StringRef Directive, SMLoc Loc) {
454 return parseVersionMin(Directive, Loc, MCVM_IOSVersionMin);
455 }
parseMacOSXVersionMin(StringRef Directive,SMLoc Loc)456 bool parseMacOSXVersionMin(StringRef Directive, SMLoc Loc) {
457 return parseVersionMin(Directive, Loc, MCVM_OSXVersionMin);
458 }
459
460 bool parseBuildVersion(StringRef Directive, SMLoc Loc);
461 bool parseVersionMin(StringRef Directive, SMLoc Loc, MCVersionMinType Type);
462 bool parseMajorMinorVersionComponent(unsigned *Major, unsigned *Minor,
463 const char *VersionName);
464 bool parseOptionalTrailingVersionComponent(unsigned *Component,
465 const char *ComponentName);
466 bool parseVersion(unsigned *Major, unsigned *Minor, unsigned *Update);
467 bool parseSDKVersion(VersionTuple &SDKVersion);
468 void checkVersion(StringRef Directive, StringRef Arg, SMLoc Loc,
469 Triple::OSType ExpectedOS);
470 };
471
472 } // end anonymous namespace
473
parseSectionSwitch(StringRef Segment,StringRef Section,unsigned TAA,unsigned Align,unsigned StubSize)474 bool DarwinAsmParser::parseSectionSwitch(StringRef Segment, StringRef Section,
475 unsigned TAA, unsigned Align,
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 (Align)
496 getStreamer().emitValueToAlignment(Align);
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.equals(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 const char *SecureLogFile = getContext().getSecureLogFile();
771 if (!SecureLogFile)
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>(StringRef(SecureLogFile), EC,
780 sys::fs::OF_Append |
781 sys::fs::OF_TextWithCRLF);
782 if (EC)
783 return Error(IDLoc, Twine("can't open secure log file: ") +
784 SecureLogFile + " (" + EC.message() + ")");
785 OS = NewOS.get();
786 getContext().setSecureLog(std::move(NewOS));
787 }
788
789 // Write the message.
790 unsigned CurBuf = getSourceManager().FindBufferContainingLoc(IDLoc);
791 *OS << getSourceManager().getBufferInfo(CurBuf).Buffer->getBufferIdentifier()
792 << ":" << getSourceManager().FindLineNumber(IDLoc, CurBuf) << ":"
793 << LogMessage + "\n";
794
795 getContext().setSecureLogUsed(true);
796
797 return false;
798 }
799
800 /// ParseDirectiveSecureLogReset
801 /// ::= .secure_log_reset
parseDirectiveSecureLogReset(StringRef,SMLoc IDLoc)802 bool DarwinAsmParser::parseDirectiveSecureLogReset(StringRef, SMLoc IDLoc) {
803 if (getLexer().isNot(AsmToken::EndOfStatement))
804 return TokError("unexpected token in '.secure_log_reset' directive");
805
806 Lex();
807
808 getContext().setSecureLogUsed(false);
809
810 return false;
811 }
812
813 /// parseDirectiveSubsectionsViaSymbols
814 /// ::= .subsections_via_symbols
parseDirectiveSubsectionsViaSymbols(StringRef,SMLoc)815 bool DarwinAsmParser::parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc) {
816 if (getLexer().isNot(AsmToken::EndOfStatement))
817 return TokError("unexpected token in '.subsections_via_symbols' directive");
818
819 Lex();
820
821 getStreamer().emitAssemblerFlag(MCAF_SubsectionsViaSymbols);
822
823 return false;
824 }
825
826 /// ParseDirectiveTBSS
827 /// ::= .tbss identifier, size, align
parseDirectiveTBSS(StringRef,SMLoc)828 bool DarwinAsmParser::parseDirectiveTBSS(StringRef, SMLoc) {
829 SMLoc IDLoc = getLexer().getLoc();
830 StringRef Name;
831 if (getParser().parseIdentifier(Name))
832 return TokError("expected identifier in directive");
833
834 // Handle the identifier as the key symbol.
835 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
836
837 if (getLexer().isNot(AsmToken::Comma))
838 return TokError("unexpected token in directive");
839 Lex();
840
841 int64_t Size;
842 SMLoc SizeLoc = getLexer().getLoc();
843 if (getParser().parseAbsoluteExpression(Size))
844 return true;
845
846 int64_t Pow2Alignment = 0;
847 SMLoc Pow2AlignmentLoc;
848 if (getLexer().is(AsmToken::Comma)) {
849 Lex();
850 Pow2AlignmentLoc = getLexer().getLoc();
851 if (getParser().parseAbsoluteExpression(Pow2Alignment))
852 return true;
853 }
854
855 if (getLexer().isNot(AsmToken::EndOfStatement))
856 return TokError("unexpected token in '.tbss' directive");
857
858 Lex();
859
860 if (Size < 0)
861 return Error(SizeLoc, "invalid '.tbss' directive size, can't be less than"
862 "zero");
863
864 // FIXME: Diagnose overflow.
865 if (Pow2Alignment < 0)
866 return Error(Pow2AlignmentLoc, "invalid '.tbss' alignment, can't be less"
867 "than zero");
868
869 if (!Sym->isUndefined())
870 return Error(IDLoc, "invalid symbol redefinition");
871
872 getStreamer().emitTBSSSymbol(
873 getContext().getMachOSection("__DATA", "__thread_bss",
874 MachO::S_THREAD_LOCAL_ZEROFILL, 0,
875 SectionKind::getThreadBSS()),
876 Sym, Size, 1 << Pow2Alignment);
877
878 return false;
879 }
880
881 /// ParseDirectiveZerofill
882 /// ::= .zerofill segname , sectname [, identifier , size_expression [
883 /// , align_expression ]]
parseDirectiveZerofill(StringRef,SMLoc)884 bool DarwinAsmParser::parseDirectiveZerofill(StringRef, SMLoc) {
885 StringRef Segment;
886 if (getParser().parseIdentifier(Segment))
887 return TokError("expected segment name after '.zerofill' directive");
888
889 if (getLexer().isNot(AsmToken::Comma))
890 return TokError("unexpected token in directive");
891 Lex();
892
893 StringRef Section;
894 SMLoc SectionLoc = getLexer().getLoc();
895 if (getParser().parseIdentifier(Section))
896 return TokError("expected section name after comma in '.zerofill' "
897 "directive");
898
899 // If this is the end of the line all that was wanted was to create the
900 // the section but with no symbol.
901 if (getLexer().is(AsmToken::EndOfStatement)) {
902 // Create the zerofill section but no symbol
903 getStreamer().emitZerofill(
904 getContext().getMachOSection(Segment, Section, MachO::S_ZEROFILL, 0,
905 SectionKind::getBSS()),
906 /*Symbol=*/nullptr, /*Size=*/0, /*ByteAlignment=*/0, SectionLoc);
907 return false;
908 }
909
910 if (getLexer().isNot(AsmToken::Comma))
911 return TokError("unexpected token in directive");
912 Lex();
913
914 SMLoc IDLoc = getLexer().getLoc();
915 StringRef IDStr;
916 if (getParser().parseIdentifier(IDStr))
917 return TokError("expected identifier in directive");
918
919 // handle the identifier as the key symbol.
920 MCSymbol *Sym = getContext().getOrCreateSymbol(IDStr);
921
922 if (getLexer().isNot(AsmToken::Comma))
923 return TokError("unexpected token in directive");
924 Lex();
925
926 int64_t Size;
927 SMLoc SizeLoc = getLexer().getLoc();
928 if (getParser().parseAbsoluteExpression(Size))
929 return true;
930
931 int64_t Pow2Alignment = 0;
932 SMLoc Pow2AlignmentLoc;
933 if (getLexer().is(AsmToken::Comma)) {
934 Lex();
935 Pow2AlignmentLoc = getLexer().getLoc();
936 if (getParser().parseAbsoluteExpression(Pow2Alignment))
937 return true;
938 }
939
940 if (getLexer().isNot(AsmToken::EndOfStatement))
941 return TokError("unexpected token in '.zerofill' directive");
942
943 Lex();
944
945 if (Size < 0)
946 return Error(SizeLoc, "invalid '.zerofill' directive size, can't be less "
947 "than zero");
948
949 // NOTE: The alignment in the directive is a power of 2 value, the assembler
950 // may internally end up wanting an alignment in bytes.
951 // FIXME: Diagnose overflow.
952 if (Pow2Alignment < 0)
953 return Error(Pow2AlignmentLoc, "invalid '.zerofill' directive alignment, "
954 "can't be less than zero");
955
956 if (!Sym->isUndefined())
957 return Error(IDLoc, "invalid symbol redefinition");
958
959 // Create the zerofill Symbol with Size and Pow2Alignment
960 //
961 // FIXME: Arch specific.
962 getStreamer().emitZerofill(getContext().getMachOSection(
963 Segment, Section, MachO::S_ZEROFILL,
964 0, SectionKind::getBSS()),
965 Sym, Size, 1 << Pow2Alignment, SectionLoc);
966
967 return false;
968 }
969
970 /// ParseDirectiveDataRegion
971 /// ::= .data_region [ ( jt8 | jt16 | jt32 ) ]
parseDirectiveDataRegion(StringRef,SMLoc)972 bool DarwinAsmParser::parseDirectiveDataRegion(StringRef, SMLoc) {
973 if (getLexer().is(AsmToken::EndOfStatement)) {
974 Lex();
975 getStreamer().emitDataRegion(MCDR_DataRegion);
976 return false;
977 }
978 StringRef RegionType;
979 SMLoc Loc = getParser().getTok().getLoc();
980 if (getParser().parseIdentifier(RegionType))
981 return TokError("expected region type after '.data_region' directive");
982 int Kind = StringSwitch<int>(RegionType)
983 .Case("jt8", MCDR_DataRegionJT8)
984 .Case("jt16", MCDR_DataRegionJT16)
985 .Case("jt32", MCDR_DataRegionJT32)
986 .Default(-1);
987 if (Kind == -1)
988 return Error(Loc, "unknown region type in '.data_region' directive");
989 Lex();
990
991 getStreamer().emitDataRegion((MCDataRegionType)Kind);
992 return false;
993 }
994
995 /// ParseDirectiveDataRegionEnd
996 /// ::= .end_data_region
parseDirectiveDataRegionEnd(StringRef,SMLoc)997 bool DarwinAsmParser::parseDirectiveDataRegionEnd(StringRef, SMLoc) {
998 if (getLexer().isNot(AsmToken::EndOfStatement))
999 return TokError("unexpected token in '.end_data_region' directive");
1000
1001 Lex();
1002 getStreamer().emitDataRegion(MCDR_DataRegionEnd);
1003 return false;
1004 }
1005
isSDKVersionToken(const AsmToken & Tok)1006 static bool isSDKVersionToken(const AsmToken &Tok) {
1007 return Tok.is(AsmToken::Identifier) && Tok.getIdentifier() == "sdk_version";
1008 }
1009
1010 /// parseMajorMinorVersionComponent ::= major, minor
parseMajorMinorVersionComponent(unsigned * Major,unsigned * Minor,const char * VersionName)1011 bool DarwinAsmParser::parseMajorMinorVersionComponent(unsigned *Major,
1012 unsigned *Minor,
1013 const char *VersionName) {
1014 // Get the major version number.
1015 if (getLexer().isNot(AsmToken::Integer))
1016 return TokError(Twine("invalid ") + VersionName +
1017 " major version number, integer expected");
1018 int64_t MajorVal = getLexer().getTok().getIntVal();
1019 if (MajorVal > 65535 || MajorVal <= 0)
1020 return TokError(Twine("invalid ") + VersionName + " major version number");
1021 *Major = (unsigned)MajorVal;
1022 Lex();
1023 if (getLexer().isNot(AsmToken::Comma))
1024 return TokError(Twine(VersionName) +
1025 " minor version number required, comma expected");
1026 Lex();
1027 // Get the minor version number.
1028 if (getLexer().isNot(AsmToken::Integer))
1029 return TokError(Twine("invalid ") + VersionName +
1030 " minor version number, integer expected");
1031 int64_t MinorVal = getLexer().getTok().getIntVal();
1032 if (MinorVal > 255 || MinorVal < 0)
1033 return TokError(Twine("invalid ") + VersionName + " minor version number");
1034 *Minor = MinorVal;
1035 Lex();
1036 return false;
1037 }
1038
1039 /// parseOptionalTrailingVersionComponent ::= , version_number
parseOptionalTrailingVersionComponent(unsigned * Component,const char * ComponentName)1040 bool DarwinAsmParser::parseOptionalTrailingVersionComponent(
1041 unsigned *Component, const char *ComponentName) {
1042 assert(getLexer().is(AsmToken::Comma) && "comma expected");
1043 Lex();
1044 if (getLexer().isNot(AsmToken::Integer))
1045 return TokError(Twine("invalid ") + ComponentName +
1046 " version number, integer expected");
1047 int64_t Val = getLexer().getTok().getIntVal();
1048 if (Val > 255 || Val < 0)
1049 return TokError(Twine("invalid ") + ComponentName + " version number");
1050 *Component = Val;
1051 Lex();
1052 return false;
1053 }
1054
1055 /// parseVersion ::= parseMajorMinorVersionComponent
1056 /// parseOptionalTrailingVersionComponent
parseVersion(unsigned * Major,unsigned * Minor,unsigned * Update)1057 bool DarwinAsmParser::parseVersion(unsigned *Major, unsigned *Minor,
1058 unsigned *Update) {
1059 if (parseMajorMinorVersionComponent(Major, Minor, "OS"))
1060 return true;
1061
1062 // Get the update level, if specified
1063 *Update = 0;
1064 if (getLexer().is(AsmToken::EndOfStatement) ||
1065 isSDKVersionToken(getLexer().getTok()))
1066 return false;
1067 if (getLexer().isNot(AsmToken::Comma))
1068 return TokError("invalid OS update specifier, comma expected");
1069 if (parseOptionalTrailingVersionComponent(Update, "OS update"))
1070 return true;
1071 return false;
1072 }
1073
parseSDKVersion(VersionTuple & SDKVersion)1074 bool DarwinAsmParser::parseSDKVersion(VersionTuple &SDKVersion) {
1075 assert(isSDKVersionToken(getLexer().getTok()) && "expected sdk_version");
1076 Lex();
1077 unsigned Major, Minor;
1078 if (parseMajorMinorVersionComponent(&Major, &Minor, "SDK"))
1079 return true;
1080 SDKVersion = VersionTuple(Major, Minor);
1081
1082 // Get the subminor version, if specified.
1083 if (getLexer().is(AsmToken::Comma)) {
1084 unsigned Subminor;
1085 if (parseOptionalTrailingVersionComponent(&Subminor, "SDK subminor"))
1086 return true;
1087 SDKVersion = VersionTuple(Major, Minor, Subminor);
1088 }
1089 return false;
1090 }
1091
checkVersion(StringRef Directive,StringRef Arg,SMLoc Loc,Triple::OSType ExpectedOS)1092 void DarwinAsmParser::checkVersion(StringRef Directive, StringRef Arg,
1093 SMLoc Loc, Triple::OSType ExpectedOS) {
1094 const Triple &Target = getContext().getTargetTriple();
1095 if (Target.getOS() != ExpectedOS)
1096 Warning(Loc, Twine(Directive) +
1097 (Arg.empty() ? Twine() : Twine(' ') + Arg) +
1098 " used while targeting " + Target.getOSName());
1099
1100 if (LastVersionDirective.isValid()) {
1101 Warning(Loc, "overriding previous version directive");
1102 Note(LastVersionDirective, "previous definition is here");
1103 }
1104 LastVersionDirective = Loc;
1105 }
1106
getOSTypeFromMCVM(MCVersionMinType Type)1107 static Triple::OSType getOSTypeFromMCVM(MCVersionMinType Type) {
1108 switch (Type) {
1109 case MCVM_WatchOSVersionMin: return Triple::WatchOS;
1110 case MCVM_TvOSVersionMin: return Triple::TvOS;
1111 case MCVM_IOSVersionMin: return Triple::IOS;
1112 case MCVM_OSXVersionMin: return Triple::MacOSX;
1113 }
1114 llvm_unreachable("Invalid mc version min type");
1115 }
1116
1117 /// parseVersionMin
1118 /// ::= .ios_version_min parseVersion parseSDKVersion
1119 /// | .macosx_version_min parseVersion parseSDKVersion
1120 /// | .tvos_version_min parseVersion parseSDKVersion
1121 /// | .watchos_version_min parseVersion parseSDKVersion
parseVersionMin(StringRef Directive,SMLoc Loc,MCVersionMinType Type)1122 bool DarwinAsmParser::parseVersionMin(StringRef Directive, SMLoc Loc,
1123 MCVersionMinType Type) {
1124 unsigned Major;
1125 unsigned Minor;
1126 unsigned Update;
1127 if (parseVersion(&Major, &Minor, &Update))
1128 return true;
1129
1130 VersionTuple SDKVersion;
1131 if (isSDKVersionToken(getLexer().getTok()) && parseSDKVersion(SDKVersion))
1132 return true;
1133
1134 if (parseToken(AsmToken::EndOfStatement))
1135 return addErrorSuffix(Twine(" in '") + Directive + "' directive");
1136
1137 Triple::OSType ExpectedOS = getOSTypeFromMCVM(Type);
1138 checkVersion(Directive, StringRef(), Loc, ExpectedOS);
1139 getStreamer().emitVersionMin(Type, Major, Minor, Update, SDKVersion);
1140 return false;
1141 }
1142
getOSTypeFromPlatform(MachO::PlatformType Type)1143 static Triple::OSType getOSTypeFromPlatform(MachO::PlatformType Type) {
1144 switch (Type) {
1145 case MachO::PLATFORM_MACOS: return Triple::MacOSX;
1146 case MachO::PLATFORM_IOS: return Triple::IOS;
1147 case MachO::PLATFORM_TVOS: return Triple::TvOS;
1148 case MachO::PLATFORM_WATCHOS: return Triple::WatchOS;
1149 case MachO::PLATFORM_BRIDGEOS: /* silence warning */ break;
1150 case MachO::PLATFORM_MACCATALYST: return Triple::IOS;
1151 case MachO::PLATFORM_IOSSIMULATOR: /* silence warning */ break;
1152 case MachO::PLATFORM_TVOSSIMULATOR: /* silence warning */ break;
1153 case MachO::PLATFORM_WATCHOSSIMULATOR: /* silence warning */ break;
1154 case MachO::PLATFORM_DRIVERKIT: /* silence warning */ break;
1155 }
1156 llvm_unreachable("Invalid mach-o platform type");
1157 }
1158
1159 /// parseBuildVersion
1160 /// ::= .build_version (macos|ios|tvos|watchos), parseVersion parseSDKVersion
parseBuildVersion(StringRef Directive,SMLoc Loc)1161 bool DarwinAsmParser::parseBuildVersion(StringRef Directive, SMLoc Loc) {
1162 StringRef PlatformName;
1163 SMLoc PlatformLoc = getTok().getLoc();
1164 if (getParser().parseIdentifier(PlatformName))
1165 return TokError("platform name expected");
1166
1167 unsigned Platform = StringSwitch<unsigned>(PlatformName)
1168 .Case("macos", MachO::PLATFORM_MACOS)
1169 .Case("ios", MachO::PLATFORM_IOS)
1170 .Case("tvos", MachO::PLATFORM_TVOS)
1171 .Case("watchos", MachO::PLATFORM_WATCHOS)
1172 .Case("macCatalyst", MachO::PLATFORM_MACCATALYST)
1173 .Default(0);
1174 if (Platform == 0)
1175 return Error(PlatformLoc, "unknown platform name");
1176
1177 if (getLexer().isNot(AsmToken::Comma))
1178 return TokError("version number required, comma expected");
1179 Lex();
1180
1181 unsigned Major;
1182 unsigned Minor;
1183 unsigned Update;
1184 if (parseVersion(&Major, &Minor, &Update))
1185 return true;
1186
1187 VersionTuple SDKVersion;
1188 if (isSDKVersionToken(getLexer().getTok()) && parseSDKVersion(SDKVersion))
1189 return true;
1190
1191 if (parseToken(AsmToken::EndOfStatement))
1192 return addErrorSuffix(" in '.build_version' directive");
1193
1194 Triple::OSType ExpectedOS
1195 = getOSTypeFromPlatform((MachO::PlatformType)Platform);
1196 checkVersion(Directive, PlatformName, Loc, ExpectedOS);
1197 getStreamer().emitBuildVersion(Platform, Major, Minor, Update, SDKVersion);
1198 return false;
1199 }
1200
1201
1202 namespace llvm {
1203
createDarwinAsmParser()1204 MCAsmParserExtension *createDarwinAsmParser() {
1205 return new DarwinAsmParser;
1206 }
1207
1208 } // end llvm namespace
1209