forked from llvm/llvm-project
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathDarwinAsmParser.cpp
1218 lines (1022 loc) · 43.7 KB
/
DarwinAsmParser.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
//===- DarwinAsmParser.cpp - Darwin (Mach-O) Assembly Parser --------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Triple.h"
#include "llvm/ADT/Twine.h"
#include "llvm/BinaryFormat/MachO.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDirectives.h"
#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/MCParser/MCAsmLexer.h"
#include "llvm/MC/MCParser/MCAsmParser.h"
#include "llvm/MC/MCParser/MCAsmParserExtension.h"
#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/SectionKind.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SMLoc.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cstddef>
#include <cstdint>
#include <string>
#include <system_error>
#include <utility>
using namespace llvm;
namespace {
/// Implementation of directive handling which is shared across all
/// Darwin targets.
class DarwinAsmParser : public MCAsmParserExtension {
template<bool (DarwinAsmParser::*HandlerMethod)(StringRef, SMLoc)>
void addDirectiveHandler(StringRef Directive) {
MCAsmParser::ExtensionDirectiveHandler Handler = std::make_pair(
this, HandleDirective<DarwinAsmParser, HandlerMethod>);
getParser().addDirectiveHandler(Directive, Handler);
}
bool parseSectionSwitch(StringRef Segment, StringRef Section,
unsigned TAA = 0, unsigned ImplicitAlign = 0,
unsigned StubSize = 0);
SMLoc LastVersionDirective;
public:
DarwinAsmParser() = default;
void Initialize(MCAsmParser &Parser) override {
// Call the base implementation.
this->MCAsmParserExtension::Initialize(Parser);
addDirectiveHandler<&DarwinAsmParser::parseDirectiveAltEntry>(".alt_entry");
addDirectiveHandler<&DarwinAsmParser::parseDirectiveDesc>(".desc");
addDirectiveHandler<&DarwinAsmParser::parseDirectiveIndirectSymbol>(
".indirect_symbol");
addDirectiveHandler<&DarwinAsmParser::parseDirectiveLsym>(".lsym");
addDirectiveHandler<&DarwinAsmParser::parseDirectiveSubsectionsViaSymbols>(
".subsections_via_symbols");
addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".dump");
addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".load");
addDirectiveHandler<&DarwinAsmParser::parseDirectiveSection>(".section");
addDirectiveHandler<&DarwinAsmParser::parseDirectivePushSection>(
".pushsection");
addDirectiveHandler<&DarwinAsmParser::parseDirectivePopSection>(
".popsection");
addDirectiveHandler<&DarwinAsmParser::parseDirectivePrevious>(".previous");
addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogUnique>(
".secure_log_unique");
addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogReset>(
".secure_log_reset");
addDirectiveHandler<&DarwinAsmParser::parseDirectiveTBSS>(".tbss");
addDirectiveHandler<&DarwinAsmParser::parseDirectiveZerofill>(".zerofill");
addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegion>(
".data_region");
addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegionEnd>(
".end_data_region");
// Special section directives.
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveBss>(".bss");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConst>(".const");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstData>(
".const_data");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstructor>(
".constructor");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveCString>(
".cstring");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveData>(".data");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDestructor>(
".destructor");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDyld>(".dyld");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit0>(
".fvmlib_init0");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit1>(
".fvmlib_init1");
addDirectiveHandler<
&DarwinAsmParser::parseSectionDirectiveLazySymbolPointers>(
".lazy_symbol_pointer");
addDirectiveHandler<&DarwinAsmParser::parseDirectiveLinkerOption>(
".linker_option");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral16>(
".literal16");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral4>(
".literal4");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral8>(
".literal8");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModInitFunc>(
".mod_init_func");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModTermFunc>(
".mod_term_func");
addDirectiveHandler<
&DarwinAsmParser::parseSectionDirectiveNonLazySymbolPointers>(
".non_lazy_symbol_pointer");
addDirectiveHandler<
&DarwinAsmParser::parseSectionDirectiveThreadLocalVariablePointers>(
".thread_local_variable_pointer");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatClsMeth>(
".objc_cat_cls_meth");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatInstMeth>(
".objc_cat_inst_meth");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCategory>(
".objc_category");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClass>(
".objc_class");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassNames>(
".objc_class_names");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassVars>(
".objc_class_vars");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsMeth>(
".objc_cls_meth");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsRefs>(
".objc_cls_refs");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCInstMeth>(
".objc_inst_meth");
addDirectiveHandler<
&DarwinAsmParser::parseSectionDirectiveObjCInstanceVars>(
".objc_instance_vars");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMessageRefs>(
".objc_message_refs");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMetaClass>(
".objc_meta_class");
addDirectiveHandler<
&DarwinAsmParser::parseSectionDirectiveObjCMethVarNames>(
".objc_meth_var_names");
addDirectiveHandler<
&DarwinAsmParser::parseSectionDirectiveObjCMethVarTypes>(
".objc_meth_var_types");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCModuleInfo>(
".objc_module_info");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCProtocol>(
".objc_protocol");
addDirectiveHandler<
&DarwinAsmParser::parseSectionDirectiveObjCSelectorStrs>(
".objc_selector_strs");
addDirectiveHandler<
&DarwinAsmParser::parseSectionDirectiveObjCStringObject>(
".objc_string_object");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCSymbols>(
".objc_symbols");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectivePICSymbolStub>(
".picsymbol_stub");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticConst>(
".static_const");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticData>(
".static_data");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveSymbolStub>(
".symbol_stub");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTData>(".tdata");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveText>(".text");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveThreadInitFunc>(
".thread_init_func");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTLV>(".tlv");
addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveIdent>(".ident");
addDirectiveHandler<&DarwinAsmParser::parseWatchOSVersionMin>(
".watchos_version_min");
addDirectiveHandler<&DarwinAsmParser::parseTvOSVersionMin>(
".tvos_version_min");
addDirectiveHandler<&DarwinAsmParser::parseIOSVersionMin>(
".ios_version_min");
addDirectiveHandler<&DarwinAsmParser::parseMacOSXVersionMin>(
".macosx_version_min");
addDirectiveHandler<&DarwinAsmParser::parseBuildVersion>(".build_version");
addDirectiveHandler<&DarwinAsmParser::parseDirectiveCGProfile>(
".cg_profile");
LastVersionDirective = SMLoc();
}
bool parseDirectiveAltEntry(StringRef, SMLoc);
bool parseDirectiveDesc(StringRef, SMLoc);
bool parseDirectiveIndirectSymbol(StringRef, SMLoc);
bool parseDirectiveDumpOrLoad(StringRef, SMLoc);
bool parseDirectiveLsym(StringRef, SMLoc);
bool parseDirectiveLinkerOption(StringRef, SMLoc);
bool parseDirectiveSection(StringRef, SMLoc);
bool parseDirectivePushSection(StringRef, SMLoc);
bool parseDirectivePopSection(StringRef, SMLoc);
bool parseDirectivePrevious(StringRef, SMLoc);
bool parseDirectiveSecureLogReset(StringRef, SMLoc);
bool parseDirectiveSecureLogUnique(StringRef, SMLoc);
bool parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc);
bool parseDirectiveTBSS(StringRef, SMLoc);
bool parseDirectiveZerofill(StringRef, SMLoc);
bool parseDirectiveDataRegion(StringRef, SMLoc);
bool parseDirectiveDataRegionEnd(StringRef, SMLoc);
// Named Section Directive
bool parseSectionDirectiveBss(StringRef, SMLoc) {
return parseSectionSwitch("__DATA", "__bss");
}
bool parseSectionDirectiveConst(StringRef, SMLoc) {
return parseSectionSwitch("__TEXT", "__const");
}
bool parseSectionDirectiveStaticConst(StringRef, SMLoc) {
return parseSectionSwitch("__TEXT", "__static_const");
}
bool parseSectionDirectiveCString(StringRef, SMLoc) {
return parseSectionSwitch("__TEXT","__cstring",
MachO::S_CSTRING_LITERALS);
}
bool parseSectionDirectiveLiteral4(StringRef, SMLoc) {
return parseSectionSwitch("__TEXT", "__literal4",
MachO::S_4BYTE_LITERALS, 4);
}
bool parseSectionDirectiveLiteral8(StringRef, SMLoc) {
return parseSectionSwitch("__TEXT", "__literal8",
MachO::S_8BYTE_LITERALS, 8);
}
bool parseSectionDirectiveLiteral16(StringRef, SMLoc) {
return parseSectionSwitch("__TEXT","__literal16",
MachO::S_16BYTE_LITERALS, 16);
}
bool parseSectionDirectiveConstructor(StringRef, SMLoc) {
return parseSectionSwitch("__TEXT","__constructor");
}
bool parseSectionDirectiveDestructor(StringRef, SMLoc) {
return parseSectionSwitch("__TEXT","__destructor");
}
bool parseSectionDirectiveFVMLibInit0(StringRef, SMLoc) {
return parseSectionSwitch("__TEXT","__fvmlib_init0");
}
bool parseSectionDirectiveFVMLibInit1(StringRef, SMLoc) {
return parseSectionSwitch("__TEXT","__fvmlib_init1");
}
bool parseSectionDirectiveSymbolStub(StringRef, SMLoc) {
return parseSectionSwitch("__TEXT","__symbol_stub",
MachO::S_SYMBOL_STUBS |
MachO::S_ATTR_PURE_INSTRUCTIONS,
// FIXME: Different on PPC and ARM.
0, 16);
}
bool parseSectionDirectivePICSymbolStub(StringRef, SMLoc) {
return parseSectionSwitch("__TEXT","__picsymbol_stub",
MachO::S_SYMBOL_STUBS |
MachO::S_ATTR_PURE_INSTRUCTIONS, 0, 26);
}
bool parseSectionDirectiveData(StringRef, SMLoc) {
return parseSectionSwitch("__DATA", "__data");
}
bool parseSectionDirectiveStaticData(StringRef, SMLoc) {
return parseSectionSwitch("__DATA", "__static_data");
}
bool parseSectionDirectiveNonLazySymbolPointers(StringRef, SMLoc) {
return parseSectionSwitch("__DATA", "__nl_symbol_ptr",
MachO::S_NON_LAZY_SYMBOL_POINTERS, 4);
}
bool parseSectionDirectiveLazySymbolPointers(StringRef, SMLoc) {
return parseSectionSwitch("__DATA", "__la_symbol_ptr",
MachO::S_LAZY_SYMBOL_POINTERS, 4);
}
bool parseSectionDirectiveThreadLocalVariablePointers(StringRef, SMLoc) {
return parseSectionSwitch("__DATA", "__thread_ptr",
MachO::S_THREAD_LOCAL_VARIABLE_POINTERS, 4);
}
bool parseSectionDirectiveDyld(StringRef, SMLoc) {
return parseSectionSwitch("__DATA", "__dyld");
}
bool parseSectionDirectiveModInitFunc(StringRef, SMLoc) {
return parseSectionSwitch("__DATA", "__mod_init_func",
MachO::S_MOD_INIT_FUNC_POINTERS, 4);
}
bool parseSectionDirectiveModTermFunc(StringRef, SMLoc) {
return parseSectionSwitch("__DATA", "__mod_term_func",
MachO::S_MOD_TERM_FUNC_POINTERS, 4);
}
bool parseSectionDirectiveConstData(StringRef, SMLoc) {
return parseSectionSwitch("__DATA", "__const");
}
bool parseSectionDirectiveObjCClass(StringRef, SMLoc) {
return parseSectionSwitch("__OBJC", "__class",
MachO::S_ATTR_NO_DEAD_STRIP);
}
bool parseSectionDirectiveObjCMetaClass(StringRef, SMLoc) {
return parseSectionSwitch("__OBJC", "__meta_class",
MachO::S_ATTR_NO_DEAD_STRIP);
}
bool parseSectionDirectiveObjCCatClsMeth(StringRef, SMLoc) {
return parseSectionSwitch("__OBJC", "__cat_cls_meth",
MachO::S_ATTR_NO_DEAD_STRIP);
}
bool parseSectionDirectiveObjCCatInstMeth(StringRef, SMLoc) {
return parseSectionSwitch("__OBJC", "__cat_inst_meth",
MachO::S_ATTR_NO_DEAD_STRIP);
}
bool parseSectionDirectiveObjCProtocol(StringRef, SMLoc) {
return parseSectionSwitch("__OBJC", "__protocol",
MachO::S_ATTR_NO_DEAD_STRIP);
}
bool parseSectionDirectiveObjCStringObject(StringRef, SMLoc) {
return parseSectionSwitch("__OBJC", "__string_object",
MachO::S_ATTR_NO_DEAD_STRIP);
}
bool parseSectionDirectiveObjCClsMeth(StringRef, SMLoc) {
return parseSectionSwitch("__OBJC", "__cls_meth",
MachO::S_ATTR_NO_DEAD_STRIP);
}
bool parseSectionDirectiveObjCInstMeth(StringRef, SMLoc) {
return parseSectionSwitch("__OBJC", "__inst_meth",
MachO::S_ATTR_NO_DEAD_STRIP);
}
bool parseSectionDirectiveObjCClsRefs(StringRef, SMLoc) {
return parseSectionSwitch("__OBJC", "__cls_refs",
MachO::S_ATTR_NO_DEAD_STRIP |
MachO::S_LITERAL_POINTERS, 4);
}
bool parseSectionDirectiveObjCMessageRefs(StringRef, SMLoc) {
return parseSectionSwitch("__OBJC", "__message_refs",
MachO::S_ATTR_NO_DEAD_STRIP |
MachO::S_LITERAL_POINTERS, 4);
}
bool parseSectionDirectiveObjCSymbols(StringRef, SMLoc) {
return parseSectionSwitch("__OBJC", "__symbols",
MachO::S_ATTR_NO_DEAD_STRIP);
}
bool parseSectionDirectiveObjCCategory(StringRef, SMLoc) {
return parseSectionSwitch("__OBJC", "__category",
MachO::S_ATTR_NO_DEAD_STRIP);
}
bool parseSectionDirectiveObjCClassVars(StringRef, SMLoc) {
return parseSectionSwitch("__OBJC", "__class_vars",
MachO::S_ATTR_NO_DEAD_STRIP);
}
bool parseSectionDirectiveObjCInstanceVars(StringRef, SMLoc) {
return parseSectionSwitch("__OBJC", "__instance_vars",
MachO::S_ATTR_NO_DEAD_STRIP);
}
bool parseSectionDirectiveObjCModuleInfo(StringRef, SMLoc) {
return parseSectionSwitch("__OBJC", "__module_info",
MachO::S_ATTR_NO_DEAD_STRIP);
}
bool parseSectionDirectiveObjCClassNames(StringRef, SMLoc) {
return parseSectionSwitch("__TEXT", "__cstring",
MachO::S_CSTRING_LITERALS);
}
bool parseSectionDirectiveObjCMethVarTypes(StringRef, SMLoc) {
return parseSectionSwitch("__TEXT", "__cstring",
MachO::S_CSTRING_LITERALS);
}
bool parseSectionDirectiveObjCMethVarNames(StringRef, SMLoc) {
return parseSectionSwitch("__TEXT", "__cstring",
MachO::S_CSTRING_LITERALS);
}
bool parseSectionDirectiveObjCSelectorStrs(StringRef, SMLoc) {
return parseSectionSwitch("__OBJC", "__selector_strs",
MachO::S_CSTRING_LITERALS);
}
bool parseSectionDirectiveTData(StringRef, SMLoc) {
return parseSectionSwitch("__DATA", "__thread_data",
MachO::S_THREAD_LOCAL_REGULAR);
}
bool parseSectionDirectiveText(StringRef, SMLoc) {
return parseSectionSwitch("__TEXT", "__text",
MachO::S_ATTR_PURE_INSTRUCTIONS);
}
bool parseSectionDirectiveTLV(StringRef, SMLoc) {
return parseSectionSwitch("__DATA", "__thread_vars",
MachO::S_THREAD_LOCAL_VARIABLES);
}
bool parseSectionDirectiveIdent(StringRef, SMLoc) {
// Darwin silently ignores the .ident directive.
getParser().eatToEndOfStatement();
return false;
}
bool parseSectionDirectiveThreadInitFunc(StringRef, SMLoc) {
return parseSectionSwitch("__DATA", "__thread_init",
MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS);
}
bool parseWatchOSVersionMin(StringRef Directive, SMLoc Loc) {
return parseVersionMin(Directive, Loc, MCVM_WatchOSVersionMin);
}
bool parseTvOSVersionMin(StringRef Directive, SMLoc Loc) {
return parseVersionMin(Directive, Loc, MCVM_TvOSVersionMin);
}
bool parseIOSVersionMin(StringRef Directive, SMLoc Loc) {
return parseVersionMin(Directive, Loc, MCVM_IOSVersionMin);
}
bool parseMacOSXVersionMin(StringRef Directive, SMLoc Loc) {
return parseVersionMin(Directive, Loc, MCVM_OSXVersionMin);
}
bool parseBuildVersion(StringRef Directive, SMLoc Loc);
bool parseVersionMin(StringRef Directive, SMLoc Loc, MCVersionMinType Type);
bool parseMajorMinorVersionComponent(unsigned *Major, unsigned *Minor,
const char *VersionName);
bool parseOptionalTrailingVersionComponent(unsigned *Component,
const char *ComponentName);
bool parseVersion(unsigned *Major, unsigned *Minor, unsigned *Update);
bool parseSDKVersion(VersionTuple &SDKVersion);
void checkVersion(StringRef Directive, StringRef Arg, SMLoc Loc,
Triple::OSType ExpectedOS);
bool parseDirectiveCGProfile(StringRef Directive, SMLoc Loc);
};
} // end anonymous namespace
bool DarwinAsmParser::parseSectionSwitch(StringRef Segment, StringRef Section,
unsigned TAA, unsigned Align,
unsigned StubSize) {
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in section switching directive");
Lex();
// FIXME: Arch specific.
bool isText = TAA & MachO::S_ATTR_PURE_INSTRUCTIONS;
getStreamer().SwitchSection(getContext().getMachOSection(
Segment, Section, TAA, StubSize,
isText ? SectionKind::getText() : SectionKind::getData()));
// Set the implicit alignment, if any.
//
// FIXME: This isn't really what 'as' does; I think it just uses the implicit
// alignment on the section (e.g., if one manually inserts bytes into the
// section, then just issuing the section switch directive will not realign
// the section. However, this is arguably more reasonable behavior, and there
// is no good reason for someone to intentionally emit incorrectly sized
// values into the implicitly aligned sections.
if (Align)
getStreamer().emitValueToAlignment(Align);
return false;
}
/// parseDirectiveAltEntry
/// ::= .alt_entry identifier
bool DarwinAsmParser::parseDirectiveAltEntry(StringRef, SMLoc) {
StringRef Name;
if (getParser().parseIdentifier(Name))
return TokError("expected identifier in directive");
// Look up symbol.
MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
if (Sym->isDefined())
return TokError(".alt_entry must preceed symbol definition");
if (!getStreamer().emitSymbolAttribute(Sym, MCSA_AltEntry))
return TokError("unable to emit symbol attribute");
Lex();
return false;
}
/// parseDirectiveDesc
/// ::= .desc identifier , expression
bool DarwinAsmParser::parseDirectiveDesc(StringRef, SMLoc) {
StringRef Name;
if (getParser().parseIdentifier(Name))
return TokError("expected identifier in directive");
// Handle the identifier as the key symbol.
MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in '.desc' directive");
Lex();
int64_t DescValue;
if (getParser().parseAbsoluteExpression(DescValue))
return true;
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.desc' directive");
Lex();
// Set the n_desc field of this Symbol to this DescValue
getStreamer().emitSymbolDesc(Sym, DescValue);
return false;
}
/// parseDirectiveIndirectSymbol
/// ::= .indirect_symbol identifier
bool DarwinAsmParser::parseDirectiveIndirectSymbol(StringRef, SMLoc Loc) {
const MCSectionMachO *Current = static_cast<const MCSectionMachO *>(
getStreamer().getCurrentSectionOnly());
MachO::SectionType SectionType = Current->getType();
if (SectionType != MachO::S_NON_LAZY_SYMBOL_POINTERS &&
SectionType != MachO::S_LAZY_SYMBOL_POINTERS &&
SectionType != MachO::S_THREAD_LOCAL_VARIABLE_POINTERS &&
SectionType != MachO::S_SYMBOL_STUBS)
return Error(Loc, "indirect symbol not in a symbol pointer or stub "
"section");
StringRef Name;
if (getParser().parseIdentifier(Name))
return TokError("expected identifier in .indirect_symbol directive");
MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
// Assembler local symbols don't make any sense here. Complain loudly.
if (Sym->isTemporary())
return TokError("non-local symbol required in directive");
if (!getStreamer().emitSymbolAttribute(Sym, MCSA_IndirectSymbol))
return TokError("unable to emit indirect symbol attribute for: " + Name);
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.indirect_symbol' directive");
Lex();
return false;
}
/// parseDirectiveDumpOrLoad
/// ::= ( .dump | .load ) "filename"
bool DarwinAsmParser::parseDirectiveDumpOrLoad(StringRef Directive,
SMLoc IDLoc) {
bool IsDump = Directive == ".dump";
if (getLexer().isNot(AsmToken::String))
return TokError("expected string in '.dump' or '.load' directive");
Lex();
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.dump' or '.load' directive");
Lex();
// FIXME: If/when .dump and .load are implemented they will be done in the
// the assembly parser and not have any need for an MCStreamer API.
if (IsDump)
return Warning(IDLoc, "ignoring directive .dump for now");
else
return Warning(IDLoc, "ignoring directive .load for now");
}
/// ParseDirectiveLinkerOption
/// ::= .linker_option "string" ( , "string" )*
bool DarwinAsmParser::parseDirectiveLinkerOption(StringRef IDVal, SMLoc) {
SmallVector<std::string, 4> Args;
while (true) {
if (getLexer().isNot(AsmToken::String))
return TokError("expected string in '" + Twine(IDVal) + "' directive");
std::string Data;
if (getParser().parseEscapedString(Data))
return true;
Args.push_back(Data);
if (getLexer().is(AsmToken::EndOfStatement))
break;
if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
Lex();
}
getStreamer().emitLinkerOptions(Args);
return false;
}
/// parseDirectiveLsym
/// ::= .lsym identifier , expression
bool DarwinAsmParser::parseDirectiveLsym(StringRef, SMLoc) {
StringRef Name;
if (getParser().parseIdentifier(Name))
return TokError("expected identifier in directive");
// Handle the identifier as the key symbol.
MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in '.lsym' directive");
Lex();
const MCExpr *Value;
if (getParser().parseExpression(Value))
return true;
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.lsym' directive");
Lex();
// We don't currently support this directive.
//
// FIXME: Diagnostic location!
(void) Sym;
return TokError("directive '.lsym' is unsupported");
}
/// parseDirectiveSection:
/// ::= .section identifier (',' identifier)*
bool DarwinAsmParser::parseDirectiveSection(StringRef, SMLoc) {
SMLoc Loc = getLexer().getLoc();
StringRef SectionName;
if (getParser().parseIdentifier(SectionName))
return Error(Loc, "expected identifier after '.section' directive");
// Verify there is a following comma.
if (!getLexer().is(AsmToken::Comma))
return TokError("unexpected token in '.section' directive");
std::string SectionSpec = std::string(SectionName);
SectionSpec += ",";
// Add all the tokens until the end of the line, ParseSectionSpecifier will
// handle this.
StringRef EOL = getLexer().LexUntilEndOfStatement();
SectionSpec.append(EOL.begin(), EOL.end());
Lex();
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.section' directive");
Lex();
StringRef Segment, Section;
unsigned StubSize;
unsigned TAA;
bool TAAParsed;
if (class Error E = MCSectionMachO::ParseSectionSpecifier(
SectionSpec, Segment, Section, TAA, TAAParsed, StubSize))
return Error(Loc, toString(std::move(E)));
// Issue a warning if the target is not powerpc and Section is a *coal* section.
Triple TT = getParser().getContext().getTargetTriple();
Triple::ArchType ArchTy = TT.getArch();
if (ArchTy != Triple::ppc && ArchTy != Triple::ppc64) {
StringRef NonCoalSection = StringSwitch<StringRef>(Section)
.Case("__textcoal_nt", "__text")
.Case("__const_coal", "__const")
.Case("__datacoal_nt", "__data")
.Default(Section);
if (!Section.equals(NonCoalSection)) {
StringRef SectionVal(Loc.getPointer());
size_t B = SectionVal.find(',') + 1, E = SectionVal.find(',', B);
SMLoc BLoc = SMLoc::getFromPointer(SectionVal.data() + B);
SMLoc ELoc = SMLoc::getFromPointer(SectionVal.data() + E);
getParser().Warning(Loc, "section \"" + Section + "\" is deprecated",
SMRange(BLoc, ELoc));
getParser().Note(Loc, "change section name to \"" + NonCoalSection +
"\"", SMRange(BLoc, ELoc));
}
}
// FIXME: Arch specific.
bool isText = Segment == "__TEXT"; // FIXME: Hack.
getStreamer().SwitchSection(getContext().getMachOSection(
Segment, Section, TAA, StubSize,
isText ? SectionKind::getText() : SectionKind::getData()));
return false;
}
/// ParseDirectivePushSection:
/// ::= .pushsection identifier (',' identifier)*
bool DarwinAsmParser::parseDirectivePushSection(StringRef S, SMLoc Loc) {
getStreamer().PushSection();
if (parseDirectiveSection(S, Loc)) {
getStreamer().PopSection();
return true;
}
return false;
}
/// ParseDirectivePopSection:
/// ::= .popsection
bool DarwinAsmParser::parseDirectivePopSection(StringRef, SMLoc) {
if (!getStreamer().PopSection())
return TokError(".popsection without corresponding .pushsection");
return false;
}
/// ParseDirectivePrevious:
/// ::= .previous
bool DarwinAsmParser::parseDirectivePrevious(StringRef DirName, SMLoc) {
MCSectionSubPair PreviousSection = getStreamer().getPreviousSection();
if (!PreviousSection.first)
return TokError(".previous without corresponding .section");
getStreamer().SwitchSection(PreviousSection.first, PreviousSection.second);
return false;
}
/// ParseDirectiveSecureLogUnique
/// ::= .secure_log_unique ... message ...
bool DarwinAsmParser::parseDirectiveSecureLogUnique(StringRef, SMLoc IDLoc) {
StringRef LogMessage = getParser().parseStringToEndOfStatement();
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.secure_log_unique' directive");
if (getContext().getSecureLogUsed())
return Error(IDLoc, ".secure_log_unique specified multiple times");
// Get the secure log path.
const char *SecureLogFile = getContext().getSecureLogFile();
if (!SecureLogFile)
return Error(IDLoc, ".secure_log_unique used but AS_SECURE_LOG_FILE "
"environment variable unset.");
// Open the secure log file if we haven't already.
raw_fd_ostream *OS = getContext().getSecureLog();
if (!OS) {
std::error_code EC;
auto NewOS = std::make_unique<raw_fd_ostream>(StringRef(SecureLogFile), EC,
sys::fs::OF_Append |
sys::fs::OF_TextWithCRLF);
if (EC)
return Error(IDLoc, Twine("can't open secure log file: ") +
SecureLogFile + " (" + EC.message() + ")");
OS = NewOS.get();
getContext().setSecureLog(std::move(NewOS));
}
// Write the message.
unsigned CurBuf = getSourceManager().FindBufferContainingLoc(IDLoc);
*OS << getSourceManager().getBufferInfo(CurBuf).Buffer->getBufferIdentifier()
<< ":" << getSourceManager().FindLineNumber(IDLoc, CurBuf) << ":"
<< LogMessage + "\n";
getContext().setSecureLogUsed(true);
return false;
}
/// ParseDirectiveSecureLogReset
/// ::= .secure_log_reset
bool DarwinAsmParser::parseDirectiveSecureLogReset(StringRef, SMLoc IDLoc) {
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.secure_log_reset' directive");
Lex();
getContext().setSecureLogUsed(false);
return false;
}
/// parseDirectiveSubsectionsViaSymbols
/// ::= .subsections_via_symbols
bool DarwinAsmParser::parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc) {
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.subsections_via_symbols' directive");
Lex();
getStreamer().emitAssemblerFlag(MCAF_SubsectionsViaSymbols);
return false;
}
/// ParseDirectiveTBSS
/// ::= .tbss identifier, size, align
bool DarwinAsmParser::parseDirectiveTBSS(StringRef, SMLoc) {
SMLoc IDLoc = getLexer().getLoc();
StringRef Name;
if (getParser().parseIdentifier(Name))
return TokError("expected identifier in directive");
// Handle the identifier as the key symbol.
MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in directive");
Lex();
int64_t Size;
SMLoc SizeLoc = getLexer().getLoc();
if (getParser().parseAbsoluteExpression(Size))
return true;
int64_t Pow2Alignment = 0;
SMLoc Pow2AlignmentLoc;
if (getLexer().is(AsmToken::Comma)) {
Lex();
Pow2AlignmentLoc = getLexer().getLoc();
if (getParser().parseAbsoluteExpression(Pow2Alignment))
return true;
}
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.tbss' directive");
Lex();
if (Size < 0)
return Error(SizeLoc, "invalid '.tbss' directive size, can't be less than"
"zero");
// FIXME: Diagnose overflow.
if (Pow2Alignment < 0)
return Error(Pow2AlignmentLoc, "invalid '.tbss' alignment, can't be less"
"than zero");
if (!Sym->isUndefined())
return Error(IDLoc, "invalid symbol redefinition");
getStreamer().emitTBSSSymbol(
getContext().getMachOSection("__DATA", "__thread_bss",
MachO::S_THREAD_LOCAL_ZEROFILL, 0,
SectionKind::getThreadBSS()),
Sym, Size, 1 << Pow2Alignment);
return false;
}
/// ParseDirectiveZerofill
/// ::= .zerofill segname , sectname [, identifier , size_expression [
/// , align_expression ]]
bool DarwinAsmParser::parseDirectiveZerofill(StringRef, SMLoc) {
StringRef Segment;
if (getParser().parseIdentifier(Segment))
return TokError("expected segment name after '.zerofill' directive");
if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in directive");
Lex();
StringRef Section;
SMLoc SectionLoc = getLexer().getLoc();
if (getParser().parseIdentifier(Section))
return TokError("expected section name after comma in '.zerofill' "
"directive");
// If this is the end of the line all that was wanted was to create the
// the section but with no symbol.
if (getLexer().is(AsmToken::EndOfStatement)) {
// Create the zerofill section but no symbol
getStreamer().emitZerofill(
getContext().getMachOSection(Segment, Section, MachO::S_ZEROFILL, 0,
SectionKind::getBSS()),
/*Symbol=*/nullptr, /*Size=*/0, /*ByteAlignment=*/0, SectionLoc);
return false;
}
if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in directive");
Lex();
SMLoc IDLoc = getLexer().getLoc();
StringRef IDStr;
if (getParser().parseIdentifier(IDStr))
return TokError("expected identifier in directive");
// handle the identifier as the key symbol.
MCSymbol *Sym = getContext().getOrCreateSymbol(IDStr);
if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in directive");
Lex();
int64_t Size;
SMLoc SizeLoc = getLexer().getLoc();
if (getParser().parseAbsoluteExpression(Size))
return true;
int64_t Pow2Alignment = 0;
SMLoc Pow2AlignmentLoc;
if (getLexer().is(AsmToken::Comma)) {
Lex();
Pow2AlignmentLoc = getLexer().getLoc();
if (getParser().parseAbsoluteExpression(Pow2Alignment))
return true;
}
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.zerofill' directive");
Lex();
if (Size < 0)
return Error(SizeLoc, "invalid '.zerofill' directive size, can't be less "
"than zero");
// NOTE: The alignment in the directive is a power of 2 value, the assembler
// may internally end up wanting an alignment in bytes.
// FIXME: Diagnose overflow.
if (Pow2Alignment < 0)
return Error(Pow2AlignmentLoc, "invalid '.zerofill' directive alignment, "
"can't be less than zero");
if (!Sym->isUndefined())
return Error(IDLoc, "invalid symbol redefinition");
// Create the zerofill Symbol with Size and Pow2Alignment
//
// FIXME: Arch specific.
getStreamer().emitZerofill(getContext().getMachOSection(
Segment, Section, MachO::S_ZEROFILL,
0, SectionKind::getBSS()),
Sym, Size, 1 << Pow2Alignment, SectionLoc);
return false;
}
/// ParseDirectiveDataRegion
/// ::= .data_region [ ( jt8 | jt16 | jt32 ) ]
bool DarwinAsmParser::parseDirectiveDataRegion(StringRef, SMLoc) {
if (getLexer().is(AsmToken::EndOfStatement)) {
Lex();
getStreamer().emitDataRegion(MCDR_DataRegion);
return false;
}
StringRef RegionType;
SMLoc Loc = getParser().getTok().getLoc();
if (getParser().parseIdentifier(RegionType))
return TokError("expected region type after '.data_region' directive");
int Kind = StringSwitch<int>(RegionType)
.Case("jt8", MCDR_DataRegionJT8)
.Case("jt16", MCDR_DataRegionJT16)
.Case("jt32", MCDR_DataRegionJT32)
.Default(-1);
if (Kind == -1)
return Error(Loc, "unknown region type in '.data_region' directive");
Lex();
getStreamer().emitDataRegion((MCDataRegionType)Kind);
return false;
}
/// ParseDirectiveDataRegionEnd
/// ::= .end_data_region
bool DarwinAsmParser::parseDirectiveDataRegionEnd(StringRef, SMLoc) {