llvm/lib/MC/MCParser/DarwinAsmParser.cpp

   1 //===- DarwinAsmParser.cpp - Darwin (Mach-O) Assembly Parser --------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/ADT/SmallVector.h"
  10 #include "llvm/ADT/StringRef.h"
  11 #include "llvm/ADT/StringSwitch.h"
  12 #include "llvm/ADT/Twine.h"
  13 #include "llvm/BinaryFormat/MachO.h"
  14 #include "llvm/MC/MCContext.h"
  15 #include "llvm/MC/MCDirectives.h"
  16 #include "llvm/MC/MCParser/MCAsmLexer.h"
  17 #include "llvm/MC/MCParser/MCAsmParser.h"
  18 #include "llvm/MC/MCParser/MCAsmParserExtension.h"
  19 #include "llvm/MC/MCSectionMachO.h"
  20 #include "llvm/MC/MCStreamer.h"
  21 #include "llvm/MC/MCSymbol.h"
  22 #include "llvm/MC/SectionKind.h"
  23 #include "llvm/Support/Error.h"
  24 #include "llvm/Support/FileSystem.h"
  25 #include "llvm/Support/MemoryBuffer.h"
  26 #include "llvm/Support/SMLoc.h"
  27 #include "llvm/Support/SourceMgr.h"
  28 #include "llvm/Support/raw_ostream.h"
  29 #include "llvm/TargetParser/Triple.h"
  30 #include <cstddef>
  31 #include <cstdint>
  32 #include <string>
  33 #include <system_error>
  34 #include <utility>
  35
  36 using namespace llvm;
  37
  38 namespace {
  39
  40 /// Implementation of directive handling which is shared across all
  41 /// Darwin targets.
  42 class DarwinAsmParser : public MCAsmParserExtension {
  43   template<bool (DarwinAsmParser::*HandlerMethod)(StringRef, SMLoc)>
  44   void addDirectiveHandler(StringRef Directive) {
  45     MCAsmParser::ExtensionDirectiveHandler Handler = std::make_pair(
  46         this, HandleDirective<DarwinAsmParser, HandlerMethod>);
  47     getParser().addDirectiveHandler(Directive, Handler);
  48   }
  49
  50   bool parseSectionSwitch(StringRef Segment, StringRef Section,
  51                           unsigned TAA = 0, unsigned ImplicitAlign = 0,
  52                           unsigned StubSize = 0);
  53
  54   SMLoc LastVersionDirective;
  55
  56 public:
  57   DarwinAsmParser() = default;
  58
  59   void Initialize(MCAsmParser &Parser) override {
  60     // Call the base implementation.
  61     this->MCAsmParserExtension::Initialize(Parser);
  62
  63     addDirectiveHandler<&DarwinAsmParser::parseDirectiveAltEntry>(".alt_entry");
  64     addDirectiveHandler<&DarwinAsmParser::parseDirectiveDesc>(".desc");
  65     addDirectiveHandler<&DarwinAsmParser::parseDirectiveIndirectSymbol>(
  66       ".indirect_symbol");
  67     addDirectiveHandler<&DarwinAsmParser::parseDirectiveLsym>(".lsym");
  68     addDirectiveHandler<&DarwinAsmParser::parseDirectiveSubsectionsViaSymbols>(
  69       ".subsections_via_symbols");
  70     addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".dump");
  71     addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".load");
  72     addDirectiveHandler<&DarwinAsmParser::parseDirectiveSection>(".section");
  73     addDirectiveHandler<&DarwinAsmParser::parseDirectivePushSection>(
  74       ".pushsection");
  75     addDirectiveHandler<&DarwinAsmParser::parseDirectivePopSection>(
  76       ".popsection");
  77     addDirectiveHandler<&DarwinAsmParser::parseDirectivePrevious>(".previous");
  78     addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogUnique>(
  79       ".secure_log_unique");
  80     addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogReset>(
  81       ".secure_log_reset");
  82     addDirectiveHandler<&DarwinAsmParser::parseDirectiveTBSS>(".tbss");
  83     addDirectiveHandler<&DarwinAsmParser::parseDirectiveZerofill>(".zerofill");
  84
  85     addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegion>(
  86       ".data_region");
  87     addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegionEnd>(
  88       ".end_data_region");
  89
  90     // Special section directives.
  91     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveBss>(".bss");
  92     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConst>(".const");
  93     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstData>(
  94       ".const_data");
  95     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstructor>(
  96       ".constructor");
  97     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveCString>(
  98       ".cstring");
  99     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveData>(".data");
 100     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDestructor>(
 101       ".destructor");
 102     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDyld>(".dyld");
 103     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit0>(
 104       ".fvmlib_init0");
 105     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit1>(
 106       ".fvmlib_init1");
 107     addDirectiveHandler<
 108       &DarwinAsmParser::parseSectionDirectiveLazySymbolPointers>(
 109         ".lazy_symbol_pointer");
 110     addDirectiveHandler<&DarwinAsmParser::parseDirectiveLinkerOption>(
 111       ".linker_option");
 112     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral16>(
 113       ".literal16");
 114     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral4>(
 115       ".literal4");
 116     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral8>(
 117       ".literal8");
 118     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModInitFunc>(
 119       ".mod_init_func");
 120     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModTermFunc>(
 121       ".mod_term_func");
 122     addDirectiveHandler<
 123       &DarwinAsmParser::parseSectionDirectiveNonLazySymbolPointers>(
 124         ".non_lazy_symbol_pointer");
 125     addDirectiveHandler<
 126       &DarwinAsmParser::parseSectionDirectiveThreadLocalVariablePointers>(
 127         ".thread_local_variable_pointer");
 128     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatClsMeth>(
 129       ".objc_cat_cls_meth");
 130     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatInstMeth>(
 131       ".objc_cat_inst_meth");
 132     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCategory>(
 133       ".objc_category");
 134     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClass>(
 135       ".objc_class");
 136     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassNames>(
 137       ".objc_class_names");
 138     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassVars>(
 139       ".objc_class_vars");
 140     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsMeth>(
 141       ".objc_cls_meth");
 142     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsRefs>(
 143       ".objc_cls_refs");
 144     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCInstMeth>(
 145       ".objc_inst_meth");
 146     addDirectiveHandler<
 147       &DarwinAsmParser::parseSectionDirectiveObjCInstanceVars>(
 148         ".objc_instance_vars");
 149     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMessageRefs>(
 150       ".objc_message_refs");
 151     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMetaClass>(
 152       ".objc_meta_class");
 153     addDirectiveHandler<
 154       &DarwinAsmParser::parseSectionDirectiveObjCMethVarNames>(
 155         ".objc_meth_var_names");
 156     addDirectiveHandler<
 157       &DarwinAsmParser::parseSectionDirectiveObjCMethVarTypes>(
 158         ".objc_meth_var_types");
 159     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCModuleInfo>(
 160       ".objc_module_info");
 161     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCProtocol>(
 162       ".objc_protocol");
 163     addDirectiveHandler<
 164       &DarwinAsmParser::parseSectionDirectiveObjCSelectorStrs>(
 165         ".objc_selector_strs");
 166     addDirectiveHandler<
 167       &DarwinAsmParser::parseSectionDirectiveObjCStringObject>(
 168         ".objc_string_object");
 169     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCSymbols>(
 170       ".objc_symbols");
 171     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectivePICSymbolStub>(
 172       ".picsymbol_stub");
 173     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticConst>(
 174       ".static_const");
 175     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticData>(
 176       ".static_data");
 177     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveSymbolStub>(
 178       ".symbol_stub");
 179     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTData>(".tdata");
 180     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveText>(".text");
 181     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveThreadInitFunc>(
 182       ".thread_init_func");
 183     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTLV>(".tlv");
 184
 185     addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveIdent>(".ident");
 186     addDirectiveHandler<&DarwinAsmParser::parseWatchOSVersionMin>(
 187       ".watchos_version_min");
 188     addDirectiveHandler<&DarwinAsmParser::parseTvOSVersionMin>(
 189       ".tvos_version_min");
 190     addDirectiveHandler<&DarwinAsmParser::parseIOSVersionMin>(
 191       ".ios_version_min");
 192     addDirectiveHandler<&DarwinAsmParser::parseMacOSXVersionMin>(
 193       ".macosx_version_min");
 194     addDirectiveHandler<&DarwinAsmParser::parseBuildVersion>(".build_version");
 195     addDirectiveHandler<&DarwinAsmParser::parseDirectiveCGProfile>(
 196         ".cg_profile");
 197
 198     LastVersionDirective = SMLoc();
 199   }
 200
 201   bool parseDirectiveAltEntry(StringRef, SMLoc);
 202   bool parseDirectiveDesc(StringRef, SMLoc);
 203   bool parseDirectiveIndirectSymbol(StringRef, SMLoc);
 204   bool parseDirectiveDumpOrLoad(StringRef, SMLoc);
 205   bool parseDirectiveLsym(StringRef, SMLoc);
 206   bool parseDirectiveLinkerOption(StringRef, SMLoc);
 207   bool parseDirectiveSection(StringRef, SMLoc);
 208   bool parseDirectivePushSection(StringRef, SMLoc);
 209   bool parseDirectivePopSection(StringRef, SMLoc);
 210   bool parseDirectivePrevious(StringRef, SMLoc);
 211   bool parseDirectiveSecureLogReset(StringRef, SMLoc);
 212   bool parseDirectiveSecureLogUnique(StringRef, SMLoc);
 213   bool parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc);
 214   bool parseDirectiveTBSS(StringRef, SMLoc);
 215   bool parseDirectiveZerofill(StringRef, SMLoc);
 216   bool parseDirectiveDataRegion(StringRef, SMLoc);
 217   bool parseDirectiveDataRegionEnd(StringRef, SMLoc);
 218
 219   // Named Section Directive
 220   bool parseSectionDirectiveBss(StringRef, SMLoc) {
 221     return parseSectionSwitch("__DATA", "__bss");
 222   }
 223
 224   bool parseSectionDirectiveConst(StringRef, SMLoc) {
 225     return parseSectionSwitch("__TEXT", "__const");
 226   }
 227
 228   bool parseSectionDirectiveStaticConst(StringRef, SMLoc) {
 229     return parseSectionSwitch("__TEXT", "__static_const");
 230   }
 231
 232   bool parseSectionDirectiveCString(StringRef, SMLoc) {
 233     return parseSectionSwitch("__TEXT","__cstring",
 234                               MachO::S_CSTRING_LITERALS);
 235   }
 236
 237   bool parseSectionDirectiveLiteral4(StringRef, SMLoc) {
 238     return parseSectionSwitch("__TEXT", "__literal4",
 239                               MachO::S_4BYTE_LITERALS, 4);
 240   }
 241
 242   bool parseSectionDirectiveLiteral8(StringRef, SMLoc) {
 243     return parseSectionSwitch("__TEXT", "__literal8",
 244                               MachO::S_8BYTE_LITERALS, 8);
 245   }
 246
 247   bool parseSectionDirectiveLiteral16(StringRef, SMLoc) {
 248     return parseSectionSwitch("__TEXT","__literal16",
 249                               MachO::S_16BYTE_LITERALS, 16);
 250   }
 251
 252   bool parseSectionDirectiveConstructor(StringRef, SMLoc) {
 253     return parseSectionSwitch("__TEXT","__constructor");
 254   }
 255
 256   bool parseSectionDirectiveDestructor(StringRef, SMLoc) {
 257     return parseSectionSwitch("__TEXT","__destructor");
 258   }
 259
 260   bool parseSectionDirectiveFVMLibInit0(StringRef, SMLoc) {
 261     return parseSectionSwitch("__TEXT","__fvmlib_init0");
 262   }
 263
 264   bool parseSectionDirectiveFVMLibInit1(StringRef, SMLoc) {
 265     return parseSectionSwitch("__TEXT","__fvmlib_init1");
 266   }
 267
 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
 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
 282   bool parseSectionDirectiveData(StringRef, SMLoc) {
 283     return parseSectionSwitch("__DATA", "__data");
 284   }
 285
 286   bool parseSectionDirectiveStaticData(StringRef, SMLoc) {
 287     return parseSectionSwitch("__DATA", "__static_data");
 288   }
 289
 290   bool parseSectionDirectiveNonLazySymbolPointers(StringRef, SMLoc) {
 291     return parseSectionSwitch("__DATA", "__nl_symbol_ptr",
 292                               MachO::S_NON_LAZY_SYMBOL_POINTERS, 4);
 293   }
 294
 295   bool parseSectionDirectiveLazySymbolPointers(StringRef, SMLoc) {
 296     return parseSectionSwitch("__DATA", "__la_symbol_ptr",
 297                               MachO::S_LAZY_SYMBOL_POINTERS, 4);
 298   }
 299
 300   bool parseSectionDirectiveThreadLocalVariablePointers(StringRef, SMLoc) {
 301     return parseSectionSwitch("__DATA", "__thread_ptr",
 302                               MachO::S_THREAD_LOCAL_VARIABLE_POINTERS, 4);
 303   }
 304
 305   bool parseSectionDirectiveDyld(StringRef, SMLoc) {
 306     return parseSectionSwitch("__DATA", "__dyld");
 307   }
 308
 309   bool parseSectionDirectiveModInitFunc(StringRef, SMLoc) {
 310     return parseSectionSwitch("__DATA", "__mod_init_func",
 311                               MachO::S_MOD_INIT_FUNC_POINTERS, 4);
 312   }
 313
 314   bool parseSectionDirectiveModTermFunc(StringRef, SMLoc) {
 315     return parseSectionSwitch("__DATA", "__mod_term_func",
 316                               MachO::S_MOD_TERM_FUNC_POINTERS, 4);
 317   }
 318
 319   bool parseSectionDirectiveConstData(StringRef, SMLoc) {
 320     return parseSectionSwitch("__DATA", "__const");
 321   }
 322
 323   bool parseSectionDirectiveObjCClass(StringRef, SMLoc) {
 324     return parseSectionSwitch("__OBJC", "__class",
 325                               MachO::S_ATTR_NO_DEAD_STRIP);
 326   }
 327
 328   bool parseSectionDirectiveObjCMetaClass(StringRef, SMLoc) {
 329     return parseSectionSwitch("__OBJC", "__meta_class",
 330                               MachO::S_ATTR_NO_DEAD_STRIP);
 331   }
 332
 333   bool parseSectionDirectiveObjCCatClsMeth(StringRef, SMLoc) {
 334     return parseSectionSwitch("__OBJC", "__cat_cls_meth",
 335                               MachO::S_ATTR_NO_DEAD_STRIP);
 336   }
 337
 338   bool parseSectionDirectiveObjCCatInstMeth(StringRef, SMLoc) {
 339     return parseSectionSwitch("__OBJC", "__cat_inst_meth",
 340                               MachO::S_ATTR_NO_DEAD_STRIP);
 341   }
 342
 343   bool parseSectionDirectiveObjCProtocol(StringRef, SMLoc) {
 344     return parseSectionSwitch("__OBJC", "__protocol",
 345                               MachO::S_ATTR_NO_DEAD_STRIP);
 346   }
 347
 348   bool parseSectionDirectiveObjCStringObject(StringRef, SMLoc) {
 349     return parseSectionSwitch("__OBJC", "__string_object",
 350                               MachO::S_ATTR_NO_DEAD_STRIP);
 351   }
 352
 353   bool parseSectionDirectiveObjCClsMeth(StringRef, SMLoc) {
 354     return parseSectionSwitch("__OBJC", "__cls_meth",
 355                               MachO::S_ATTR_NO_DEAD_STRIP);
 356   }
 357
 358   bool parseSectionDirectiveObjCInstMeth(StringRef, SMLoc) {
 359     return parseSectionSwitch("__OBJC", "__inst_meth",
 360                               MachO::S_ATTR_NO_DEAD_STRIP);
 361   }
 362
 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
 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
 375   bool parseSectionDirectiveObjCSymbols(StringRef, SMLoc) {
 376     return parseSectionSwitch("__OBJC", "__symbols",
 377                               MachO::S_ATTR_NO_DEAD_STRIP);
 378   }
 379
 380   bool parseSectionDirectiveObjCCategory(StringRef, SMLoc) {
 381     return parseSectionSwitch("__OBJC", "__category",
 382                               MachO::S_ATTR_NO_DEAD_STRIP);
 383   }
 384
 385   bool parseSectionDirectiveObjCClassVars(StringRef, SMLoc) {
 386     return parseSectionSwitch("__OBJC", "__class_vars",
 387                               MachO::S_ATTR_NO_DEAD_STRIP);
 388   }
 389
 390   bool parseSectionDirectiveObjCInstanceVars(StringRef, SMLoc) {
 391     return parseSectionSwitch("__OBJC", "__instance_vars",
 392                               MachO::S_ATTR_NO_DEAD_STRIP);
 393   }
 394
 395   bool parseSectionDirectiveObjCModuleInfo(StringRef, SMLoc) {
 396     return parseSectionSwitch("__OBJC", "__module_info",
 397                               MachO::S_ATTR_NO_DEAD_STRIP);
 398   }
 399
 400   bool parseSectionDirectiveObjCClassNames(StringRef, SMLoc) {
 401     return parseSectionSwitch("__TEXT", "__cstring",
 402                               MachO::S_CSTRING_LITERALS);
 403   }
 404
 405   bool parseSectionDirectiveObjCMethVarTypes(StringRef, SMLoc) {
 406     return parseSectionSwitch("__TEXT", "__cstring",
 407                               MachO::S_CSTRING_LITERALS);
 408   }
 409
 410   bool parseSectionDirectiveObjCMethVarNames(StringRef, SMLoc) {
 411     return parseSectionSwitch("__TEXT", "__cstring",
 412                               MachO::S_CSTRING_LITERALS);
 413   }
 414
 415   bool parseSectionDirectiveObjCSelectorStrs(StringRef, SMLoc) {
 416     return parseSectionSwitch("__OBJC", "__selector_strs",
 417                               MachO::S_CSTRING_LITERALS);
 418   }
 419
 420   bool parseSectionDirectiveTData(StringRef, SMLoc) {
 421     return parseSectionSwitch("__DATA", "__thread_data",
 422                               MachO::S_THREAD_LOCAL_REGULAR);
 423   }
 424
 425   bool parseSectionDirectiveText(StringRef, SMLoc) {
 426     return parseSectionSwitch("__TEXT", "__text",
 427                               MachO::S_ATTR_PURE_INSTRUCTIONS);
 428   }
 429
 430   bool parseSectionDirectiveTLV(StringRef, SMLoc) {
 431     return parseSectionSwitch("__DATA", "__thread_vars",
 432                               MachO::S_THREAD_LOCAL_VARIABLES);
 433   }
 434
 435   bool parseSectionDirectiveIdent(StringRef, SMLoc) {
 436     // Darwin silently ignores the .ident directive.
 437     getParser().eatToEndOfStatement();
 438     return false;
 439   }
 440
 441   bool parseSectionDirectiveThreadInitFunc(StringRef, SMLoc) {
 442     return parseSectionSwitch("__DATA", "__thread_init",
 443                          MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS);
 444   }
 445
 446   bool parseWatchOSVersionMin(StringRef Directive, SMLoc Loc) {
 447     return parseVersionMin(Directive, Loc, MCVM_WatchOSVersionMin);
 448   }
 449   bool parseTvOSVersionMin(StringRef Directive, SMLoc Loc) {
 450     return parseVersionMin(Directive, Loc, MCVM_TvOSVersionMin);
 451   }
 452   bool parseIOSVersionMin(StringRef Directive, SMLoc Loc) {
 453     return parseVersionMin(Directive, Loc, MCVM_IOSVersionMin);
 454   }
 455   bool parseMacOSXVersionMin(StringRef Directive, SMLoc Loc) {
 456     return parseVersionMin(Directive, Loc, MCVM_OSXVersionMin);
 457   }
 458
 459   bool parseBuildVersion(StringRef Directive, SMLoc Loc);
 460   bool parseVersionMin(StringRef Directive, SMLoc Loc, MCVersionMinType Type);
 461   bool parseMajorMinorVersionComponent(unsigned *Major, unsigned *Minor,
 462                                        const char *VersionName);
 463   bool parseOptionalTrailingVersionComponent(unsigned *Component,
 464                                              const char *ComponentName);
 465   bool parseVersion(unsigned *Major, unsigned *Minor, unsigned *Update);
 466   bool parseSDKVersion(VersionTuple &SDKVersion);
 467   void checkVersion(StringRef Directive, StringRef Arg, SMLoc Loc,
 468                     Triple::OSType ExpectedOS);
 469   bool parseDirectiveCGProfile(StringRef Directive, SMLoc Loc);
 470 };
 471
 472 } // end anonymous namespace
 473
 474 bool DarwinAsmParser::parseSectionSwitch(StringRef Segment, StringRef Section,
 475                                          unsigned TAA, unsigned Alignment,
 476                                          unsigned StubSize) {
 477   if (getLexer().isNot(AsmToken::EndOfStatement))
 478     return TokError("unexpected token in section switching directive");
 479   Lex();
 480
 481   // FIXME: Arch specific.
 482   bool isText = TAA & MachO::S_ATTR_PURE_INSTRUCTIONS;
 483   getStreamer().switchSection(getContext().getMachOSection(
 484       Segment, Section, TAA, StubSize,
 485       isText ? SectionKind::getText() : SectionKind::getData()));
 486
 487   // Set the implicit alignment, if any.
 488   //
 489   // FIXME: This isn't really what 'as' does; I think it just uses the implicit
 490   // alignment on the section (e.g., if one manually inserts bytes into the
 491   // section, then just issuing the section switch directive will not realign
 492   // the section. However, this is arguably more reasonable behavior, and there
 493   // is no good reason for someone to intentionally emit incorrectly sized
 494   // values into the implicitly aligned sections.
 495   if (Alignment)
 496     getStreamer().emitValueToAlignment(Align(Alignment));
 497
 498   return false;
 499 }
 500
 501 /// parseDirectiveAltEntry
 502 ///  ::= .alt_entry identifier
 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
 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
 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"
 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" )*
 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
 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)*
 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)*
 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
 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
 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 ...
 761 bool DarwinAsmParser::parseDirectiveSecureLogUnique(StringRef, SMLoc IDLoc) {
 762   StringRef LogMessage = getParser().parseStringToEndOfStatement();
 763   if (getLexer().isNot(AsmToken::EndOfStatement))
 764     return TokError("unexpected token in '.secure_log_unique' directive");
 765
 766   if (getContext().getSecureLogUsed())
 767     return Error(IDLoc, ".secure_log_unique specified multiple times");
 768
 769   // Get the secure log path.
 770   StringRef SecureLogFile = getContext().getSecureLogFile();
 771   if (SecureLogFile.empty())
 772     return Error(IDLoc, ".secure_log_unique used but AS_SECURE_LOG_FILE "
 773                  "environment variable unset.");
 774
 775   // Open the secure log file if we haven't already.
 776   raw_fd_ostream *OS = getContext().getSecureLog();
 777   if (!OS) {
 778     std::error_code EC;
 779     auto NewOS = std::make_unique<raw_fd_ostream>(
 780         SecureLogFile, EC, sys::fs::OF_Append | sys::fs::OF_TextWithCRLF);
 781     if (EC)
 782        return Error(IDLoc, Twine("can't open secure log file: ") +
 783                                SecureLogFile + " (" + EC.message() + ")");
 784     OS = NewOS.get();
 785     getContext().setSecureLog(std::move(NewOS));
 786   }
 787
 788   // Write the message.
 789   unsigned CurBuf = getSourceManager().FindBufferContainingLoc(IDLoc);
 790   *OS << getSourceManager().getBufferInfo(CurBuf).Buffer->getBufferIdentifier()
 791       << ":" << getSourceManager().FindLineNumber(IDLoc, CurBuf) << ":"
 792       << LogMessage + "\n";
 793
 794   getContext().setSecureLogUsed(true);
 795
 796   return false;
 797 }
 798
 799 /// ParseDirectiveSecureLogReset
 800 ///  ::= .secure_log_reset
 801 bool DarwinAsmParser::parseDirectiveSecureLogReset(StringRef, SMLoc IDLoc) {
 802   if (getLexer().isNot(AsmToken::EndOfStatement))
 803     return TokError("unexpected token in '.secure_log_reset' directive");
 804
 805   Lex();
 806
 807   getContext().setSecureLogUsed(false);
 808
 809   return false;
 810 }
 811
 812 /// parseDirectiveSubsectionsViaSymbols
 813 ///  ::= .subsections_via_symbols
 814 bool DarwinAsmParser::parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc) {
 815   if (getLexer().isNot(AsmToken::EndOfStatement))
 816     return TokError("unexpected token in '.subsections_via_symbols' directive");
 817
 818   Lex();
 819
 820   getStreamer().emitAssemblerFlag(MCAF_SubsectionsViaSymbols);
 821
 822   return false;
 823 }
 824
 825 /// ParseDirectiveTBSS
 826 ///  ::= .tbss identifier, size, align
 827 bool DarwinAsmParser::parseDirectiveTBSS(StringRef, SMLoc) {
 828   SMLoc IDLoc = getLexer().getLoc();
 829   StringRef Name;
 830   if (getParser().parseIdentifier(Name))
 831     return TokError("expected identifier in directive");
 832
 833   // Handle the identifier as the key symbol.
 834   MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
 835
 836   if (getLexer().isNot(AsmToken::Comma))
 837     return TokError("unexpected token in directive");
 838   Lex();
 839
 840   int64_t Size;
 841   SMLoc SizeLoc = getLexer().getLoc();
 842   if (getParser().parseAbsoluteExpression(Size))
 843     return true;
 844
 845   int64_t Pow2Alignment = 0;
 846   SMLoc Pow2AlignmentLoc;
 847   if (getLexer().is(AsmToken::Comma)) {
 848     Lex();
 849     Pow2AlignmentLoc = getLexer().getLoc();
 850     if (getParser().parseAbsoluteExpression(Pow2Alignment))
 851       return true;
 852   }
 853
 854   if (getLexer().isNot(AsmToken::EndOfStatement))
 855     return TokError("unexpected token in '.tbss' directive");
 856
 857   Lex();
 858
 859   if (Size < 0)
 860     return Error(SizeLoc, "invalid '.tbss' directive size, can't be less than"
 861                  "zero");
 862
 863   // FIXME: Diagnose overflow.
 864   if (Pow2Alignment < 0)
 865     return Error(Pow2AlignmentLoc, "invalid '.tbss' alignment, can't be less"
 866                  "than zero");
 867
 868   if (!Sym->isUndefined())
 869     return Error(IDLoc, "invalid symbol redefinition");
 870
 871   getStreamer().emitTBSSSymbol(
 872       getContext().getMachOSection("__DATA", "__thread_bss",
 873                                    MachO::S_THREAD_LOCAL_ZEROFILL, 0,
 874                                    SectionKind::getThreadBSS()),
 875       Sym, Size, Align(1ULL << Pow2Alignment));
 876
 877   return false;
 878 }
 879
 880 /// ParseDirectiveZerofill
 881 ///  ::= .zerofill segname , sectname [, identifier , size_expression [
 882 ///      , align_expression ]]
 883 bool DarwinAsmParser::parseDirectiveZerofill(StringRef, SMLoc) {
 884   StringRef Segment;
 885   if (getParser().parseIdentifier(Segment))
 886     return TokError("expected segment name after '.zerofill' directive");
 887
 888   if (getLexer().isNot(AsmToken::Comma))
 889     return TokError("unexpected token in directive");
 890   Lex();
 891
 892   StringRef Section;
 893   SMLoc SectionLoc = getLexer().getLoc();
 894   if (getParser().parseIdentifier(Section))
 895     return TokError("expected section name after comma in '.zerofill' "
 896                     "directive");
 897
 898   // If this is the end of the line all that was wanted was to create the
 899   // the section but with no symbol.
 900   if (getLexer().is(AsmToken::EndOfStatement)) {
 901     // Create the zerofill section but no symbol
 902     getStreamer().emitZerofill(
 903         getContext().getMachOSection(Segment, Section, MachO::S_ZEROFILL, 0,
 904                                      SectionKind::getBSS()),
 905         /*Symbol=*/nullptr, /*Size=*/0, Align(1), SectionLoc);
 906     return false;
 907   }
 908
 909   if (getLexer().isNot(AsmToken::Comma))
 910     return TokError("unexpected token in directive");
 911   Lex();
 912
 913   SMLoc IDLoc = getLexer().getLoc();
 914   StringRef IDStr;
 915   if (getParser().parseIdentifier(IDStr))
 916     return TokError("expected identifier in directive");
 917
 918   // handle the identifier as the key symbol.
 919   MCSymbol *Sym = getContext().getOrCreateSymbol(IDStr);
 920
 921   if (getLexer().isNot(AsmToken::Comma))
 922     return TokError("unexpected token in directive");
 923   Lex();
 924
 925   int64_t Size;
 926   SMLoc SizeLoc = getLexer().getLoc();
 927   if (getParser().parseAbsoluteExpression(Size))
 928     return true;
 929
 930   int64_t Pow2Alignment = 0;
 931   SMLoc Pow2AlignmentLoc;
 932   if (getLexer().is(AsmToken::Comma)) {
 933     Lex();
 934     Pow2AlignmentLoc = getLexer().getLoc();
 935     if (getParser().parseAbsoluteExpression(Pow2Alignment))
 936       return true;
 937   }
 938
 939   if (getLexer().isNot(AsmToken::EndOfStatement))
 940     return TokError("unexpected token in '.zerofill' directive");
 941
 942   Lex();
 943
 944   if (Size < 0)
 945     return Error(SizeLoc, "invalid '.zerofill' directive size, can't be less "
 946                  "than zero");
 947
 948   // NOTE: The alignment in the directive is a power of 2 value, the assembler
 949   // may internally end up wanting an alignment in bytes.
 950   // FIXME: Diagnose overflow.
 951   if (Pow2Alignment < 0)
 952     return Error(Pow2AlignmentLoc, "invalid '.zerofill' directive alignment, "
 953                  "can't be less than zero");
 954
 955   if (!Sym->isUndefined())
 956     return Error(IDLoc, "invalid symbol redefinition");
 957
 958   // Create the zerofill Symbol with Size and Pow2Alignment
 959   //
 960   // FIXME: Arch specific.
 961   getStreamer().emitZerofill(
 962       getContext().getMachOSection(Segment, Section, MachO::S_ZEROFILL, 0,
 963                                    SectionKind::getBSS()),
 964       Sym, Size, Align(1ULL << Pow2Alignment), SectionLoc);
 965
 966   return false;
 967 }
 968
 969 /// ParseDirectiveDataRegion
 970 ///  ::= .data_region [ ( jt8 | jt16 | jt32 ) ]
 971 bool DarwinAsmParser::parseDirectiveDataRegion(StringRef, SMLoc) {
 972   if (getLexer().is(AsmToken::EndOfStatement)) {
 973     Lex();
 974     getStreamer().emitDataRegion(MCDR_DataRegion);
 975     return false;
 976   }
 977   StringRef RegionType;
 978   SMLoc Loc = getParser().getTok().getLoc();
 979   if (getParser().parseIdentifier(RegionType))
 980     return TokError("expected region type after '.data_region' directive");
 981   int Kind = StringSwitch<int>(RegionType)
 982     .Case("jt8", MCDR_DataRegionJT8)
 983     .Case("jt16", MCDR_DataRegionJT16)
 984     .Case("jt32", MCDR_DataRegionJT32)
 985     .Default(-1);
 986   if (Kind == -1)
 987     return Error(Loc, "unknown region type in '.data_region' directive");
 988   Lex();
 989
 990   getStreamer().emitDataRegion((MCDataRegionType)Kind);
 991   return false;
 992 }
 993
 994 /// ParseDirectiveDataRegionEnd
 995 ///  ::= .end_data_region
 996 bool DarwinAsmParser::parseDirectiveDataRegionEnd(StringRef, SMLoc) {
 997   if (getLexer().isNot(AsmToken::EndOfStatement))
 998     return TokError("unexpected token in '.end_data_region' directive");
 999
1000   Lex();
1001   getStreamer().emitDataRegion(MCDR_DataRegionEnd);
1002   return false;
1003 }
1004
1005 static bool isSDKVersionToken(const AsmToken &Tok) {
1006   return Tok.is(AsmToken::Identifier) && Tok.getIdentifier() == "sdk_version";
1007 }
1008
1009 /// parseMajorMinorVersionComponent ::= major, minor
1010 bool DarwinAsmParser::parseMajorMinorVersionComponent(unsigned *Major,
1011                                                       unsigned *Minor,
1012                                                       const char *VersionName) {
1013   // Get the major version number.
1014   if (getLexer().isNot(AsmToken::Integer))
1015     return TokError(Twine("invalid ") + VersionName +
1016                     " major version number, integer expected");
1017   int64_t MajorVal = getLexer().getTok().getIntVal();
1018   if (MajorVal > 65535 || MajorVal <= 0)
1019     return TokError(Twine("invalid ") + VersionName + " major version number");
1020   *Major = (unsigned)MajorVal;
1021   Lex();
1022   if (getLexer().isNot(AsmToken::Comma))
1023     return TokError(Twine(VersionName) +
1024                     " minor version number required, comma expected");
1025   Lex();
1026   // Get the minor version number.
1027   if (getLexer().isNot(AsmToken::Integer))
1028     return TokError(Twine("invalid ") + VersionName +
1029                     " minor version number, integer expected");
1030   int64_t MinorVal = getLexer().getTok().getIntVal();
1031   if (MinorVal > 255 || MinorVal < 0)
1032     return TokError(Twine("invalid ") + VersionName + " minor version number");
1033   *Minor = MinorVal;
1034   Lex();
1035   return false;
1036 }
1037
1038 /// parseOptionalTrailingVersionComponent ::= , version_number
1039 bool DarwinAsmParser::parseOptionalTrailingVersionComponent(
1040     unsigned *Component, const char *ComponentName) {
1041   assert(getLexer().is(AsmToken::Comma) && "comma expected");
1042   Lex();
1043   if (getLexer().isNot(AsmToken::Integer))
1044     return TokError(Twine("invalid ") + ComponentName +
1045                     " version number, integer expected");
1046   int64_t Val = getLexer().getTok().getIntVal();
1047   if (Val > 255 || Val < 0)
1048     return TokError(Twine("invalid ") + ComponentName + " version number");
1049   *Component = Val;
1050   Lex();
1051   return false;
1052 }
1053
1054 /// parseVersion ::= parseMajorMinorVersionComponent
1055 ///                      parseOptionalTrailingVersionComponent
1056 bool DarwinAsmParser::parseVersion(unsigned *Major, unsigned *Minor,
1057                                    unsigned *Update) {
1058   if (parseMajorMinorVersionComponent(Major, Minor, "OS"))
1059     return true;
1060
1061   // Get the update level, if specified
1062   *Update = 0;
1063   if (getLexer().is(AsmToken::EndOfStatement) ||
1064       isSDKVersionToken(getLexer().getTok()))
1065     return false;
1066   if (getLexer().isNot(AsmToken::Comma))
1067     return TokError("invalid OS update specifier, comma expected");
1068   if (parseOptionalTrailingVersionComponent(Update, "OS update"))
1069     return true;
1070   return false;
1071 }
1072
1073 bool DarwinAsmParser::parseSDKVersion(VersionTuple &SDKVersion) {
1074   assert(isSDKVersionToken(getLexer().getTok()) && "expected sdk_version");
1075   Lex();
1076   unsigned Major, Minor;
1077   if (parseMajorMinorVersionComponent(&Major, &Minor, "SDK"))
1078     return true;
1079   SDKVersion = VersionTuple(Major, Minor);
1080
1081   // Get the subminor version, if specified.
1082   if (getLexer().is(AsmToken::Comma)) {
1083     unsigned Subminor;
1084     if (parseOptionalTrailingVersionComponent(&Subminor, "SDK subminor"))
1085       return true;
1086     SDKVersion = VersionTuple(Major, Minor, Subminor);
1087   }
1088   return false;
1089 }
1090
1091 void DarwinAsmParser::checkVersion(StringRef Directive, StringRef Arg,
1092                                    SMLoc Loc, Triple::OSType ExpectedOS) {
1093   const Triple &Target = getContext().getTargetTriple();
1094   if (Target.getOS() != ExpectedOS)
1095     Warning(Loc, Twine(Directive) +
1096             (Arg.empty() ? Twine() : Twine(' ') + Arg) +
1097             " used while targeting " + Target.getOSName());
1098
1099   if (LastVersionDirective.isValid()) {
1100     Warning(Loc, "overriding previous version directive");
1101     Note(LastVersionDirective, "previous definition is here");
1102   }
1103   LastVersionDirective = Loc;
1104 }
1105
1106 static Triple::OSType getOSTypeFromMCVM(MCVersionMinType Type) {
1107   switch (Type) {
1108   case MCVM_WatchOSVersionMin: return Triple::WatchOS;
1109   case MCVM_TvOSVersionMin:    return Triple::TvOS;
1110   case MCVM_IOSVersionMin:     return Triple::IOS;
1111   case MCVM_OSXVersionMin:     return Triple::MacOSX;
1112   }
1113   llvm_unreachable("Invalid mc version min type");
1114 }
1115
1116 /// parseVersionMin
1117 ///   ::= .ios_version_min parseVersion parseSDKVersion
1118 ///   |   .macosx_version_min parseVersion parseSDKVersion
1119 ///   |   .tvos_version_min parseVersion parseSDKVersion
1120 ///   |   .watchos_version_min parseVersion parseSDKVersion
1121 bool DarwinAsmParser::parseVersionMin(StringRef Directive, SMLoc Loc,
1122                                       MCVersionMinType Type) {
1123   unsigned Major;
1124   unsigned Minor;
1125   unsigned Update;
1126   if (parseVersion(&Major, &Minor, &Update))
1127     return true;
1128
1129   VersionTuple SDKVersion;
1130   if (isSDKVersionToken(getLexer().getTok()) && parseSDKVersion(SDKVersion))
1131     return true;
1132
1133   if (parseEOL())
1134     return addErrorSuffix(Twine(" in '") + Directive + "' directive");
1135
1136   Triple::OSType ExpectedOS = getOSTypeFromMCVM(Type);
1137   checkVersion(Directive, StringRef(), Loc, ExpectedOS);
1138   getStreamer().emitVersionMin(Type, Major, Minor, Update, SDKVersion);
1139   return false;
1140 }
1141
1142 static Triple::OSType getOSTypeFromPlatform(MachO::PlatformType Type) {
1143   switch (Type) {
1144   case MachO::PLATFORM_UNKNOWN: /* silence warning */
1145     break;
1146   case MachO::PLATFORM_MACOS:   return Triple::MacOSX;
1147   case MachO::PLATFORM_IOS:     return Triple::IOS;
1148   case MachO::PLATFORM_TVOS:    return Triple::TvOS;
1149   case MachO::PLATFORM_WATCHOS: return Triple::WatchOS;
1150   case MachO::PLATFORM_XROS:    return Triple::XROS;
1151   case MachO::PLATFORM_BRIDGEOS:         /* silence warning */ break;
1152   case MachO::PLATFORM_DRIVERKIT:
1153     return Triple::DriverKit;
1154   case MachO::PLATFORM_MACCATALYST: return Triple::IOS;
1155   case MachO::PLATFORM_IOSSIMULATOR:     /* silence warning */ break;
1156   case MachO::PLATFORM_TVOSSIMULATOR:    /* silence warning */ break;
1157   case MachO::PLATFORM_WATCHOSSIMULATOR: /* silence warning */ break;
1158   case MachO::PLATFORM_XROS_SIMULATOR:   /* silence warning */ break;
1159   }
1160   llvm_unreachable("Invalid mach-o platform type");
1161 }
1162
1163 /// parseBuildVersion
1164 ///   ::= .build_version (macos|ios|tvos|watchos), parseVersion parseSDKVersion
1165 bool DarwinAsmParser::parseBuildVersion(StringRef Directive, SMLoc Loc) {
1166   StringRef PlatformName;
1167   SMLoc PlatformLoc = getTok().getLoc();
1168   if (getParser().parseIdentifier(PlatformName))
1169     return TokError("platform name expected");
1170
1171   unsigned Platform = StringSwitch<unsigned>(PlatformName)
1172 #define PLATFORM(platform, id, name, build_name, target, tapi_target,          \
1173                  marketing)                                                    \
1174   .Case(#build_name, MachO::PLATFORM_##platform)
1175 #include "llvm/BinaryFormat/MachO.def"
1176                           .Default(MachO::PLATFORM_UNKNOWN);
1177
1178   if (Platform == MachO::PLATFORM_UNKNOWN)
1179     return Error(PlatformLoc, "unknown platform name");
1180
1181   if (getLexer().isNot(AsmToken::Comma))
1182     return TokError("version number required, comma expected");
1183   Lex();
1184
1185   unsigned Major;
1186   unsigned Minor;
1187   unsigned Update;
1188   if (parseVersion(&Major, &Minor, &Update))
1189     return true;
1190
1191   VersionTuple SDKVersion;
1192   if (isSDKVersionToken(getLexer().getTok()) && parseSDKVersion(SDKVersion))
1193     return true;
1194
1195   if (parseEOL())
1196     return addErrorSuffix(" in '.build_version' directive");
1197
1198   Triple::OSType ExpectedOS
1199     = getOSTypeFromPlatform((MachO::PlatformType)Platform);
1200   checkVersion(Directive, PlatformName, Loc, ExpectedOS);
1201   getStreamer().emitBuildVersion(Platform, Major, Minor, Update, SDKVersion);
1202   return false;
1203 }
1204
1205 /// parseDirectiveCGProfile
1206 ///   ::= .cg_profile from, to, count
1207 bool DarwinAsmParser::parseDirectiveCGProfile(StringRef S, SMLoc Loc) {
1208   return MCAsmParserExtension::ParseDirectiveCGProfile(S, Loc);
1209 }
1210
1211 namespace llvm {
1212
1213 MCAsmParserExtension *createDarwinAsmParser() {
1214   return new DarwinAsmParser;
1215 }
1216
1217 } // end llvm namespace