-
Notifications
You must be signed in to change notification settings - Fork 11.6k
/
llvm-nm.cpp
2140 lines (1986 loc) · 76.1 KB
/
llvm-nm.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
//===-- llvm-nm.cpp - Symbol table dumping utility for llvm ---------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This program is a utility that works like traditional Unix "nm", that is, it
// prints out the names of symbols in a bitcode or object file, along with some
// information about each symbol.
//
// This "nm" supports many of the features of GNU "nm", including its different
// output formats.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/StringSwitch.h"
#include "llvm/BinaryFormat/COFF.h"
#include "llvm/Demangle/Demangle.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/Object/Archive.h"
#include "llvm/Object/COFF.h"
#include "llvm/Object/COFFImportFile.h"
#include "llvm/Object/ELFObjectFile.h"
#include "llvm/Object/IRObjectFile.h"
#include "llvm/Object/MachO.h"
#include "llvm/Object/MachOUniversal.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Object/Wasm.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/WithColor.h"
#include "llvm/Support/raw_ostream.h"
#include <vector>
using namespace llvm;
using namespace object;
namespace {
enum OutputFormatTy { bsd, sysv, posix, darwin };
cl::OptionCategory NMCat("llvm-nm Options");
cl::opt<OutputFormatTy> OutputFormat(
"format", cl::desc("Specify output format"),
cl::values(clEnumVal(bsd, "BSD format"), clEnumVal(sysv, "System V format"),
clEnumVal(posix, "POSIX.2 format"),
clEnumVal(darwin, "Darwin -m format")),
cl::init(bsd), cl::cat(NMCat));
cl::alias OutputFormat2("f", cl::desc("Alias for --format"),
cl::aliasopt(OutputFormat));
cl::list<std::string> InputFilenames(cl::Positional, cl::desc("<input files>"),
cl::ZeroOrMore);
cl::opt<bool> UndefinedOnly("undefined-only",
cl::desc("Show only undefined symbols"),
cl::cat(NMCat));
cl::alias UndefinedOnly2("u", cl::desc("Alias for --undefined-only"),
cl::aliasopt(UndefinedOnly), cl::Grouping);
cl::opt<bool> DynamicSyms("dynamic",
cl::desc("Display the dynamic symbols instead "
"of normal symbols."),
cl::cat(NMCat));
cl::alias DynamicSyms2("D", cl::desc("Alias for --dynamic"),
cl::aliasopt(DynamicSyms), cl::Grouping);
cl::opt<bool> DefinedOnly("defined-only", cl::desc("Show only defined symbols"),
cl::cat(NMCat));
cl::alias DefinedOnly2("U", cl::desc("Alias for --defined-only"),
cl::aliasopt(DefinedOnly), cl::Grouping);
cl::opt<bool> ExternalOnly("extern-only",
cl::desc("Show only external symbols"),
cl::ZeroOrMore, cl::cat(NMCat));
cl::alias ExternalOnly2("g", cl::desc("Alias for --extern-only"),
cl::aliasopt(ExternalOnly), cl::Grouping,
cl::ZeroOrMore);
cl::opt<bool> NoWeakSymbols("no-weak", cl::desc("Show only non-weak symbols"),
cl::cat(NMCat));
cl::alias NoWeakSymbols2("W", cl::desc("Alias for --no-weak"),
cl::aliasopt(NoWeakSymbols), cl::Grouping);
cl::opt<bool> BSDFormat("B", cl::desc("Alias for --format=bsd"), cl::Grouping,
cl::cat(NMCat));
cl::opt<bool> POSIXFormat("P", cl::desc("Alias for --format=posix"),
cl::Grouping, cl::cat(NMCat));
cl::alias Portability("portability", cl::desc("Alias for --format=posix"),
cl::aliasopt(POSIXFormat), cl::NotHidden);
cl::opt<bool> DarwinFormat("m", cl::desc("Alias for --format=darwin"),
cl::Grouping, cl::cat(NMCat));
static cl::list<std::string>
ArchFlags("arch", cl::desc("architecture(s) from a Mach-O file to dump"),
cl::ZeroOrMore, cl::cat(NMCat));
bool ArchAll = false;
cl::opt<bool> PrintFileName(
"print-file-name",
cl::desc("Precede each symbol with the object file it came from"),
cl::cat(NMCat));
cl::alias PrintFileNameA("A", cl::desc("Alias for --print-file-name"),
cl::aliasopt(PrintFileName), cl::Grouping);
cl::alias PrintFileNameo("o", cl::desc("Alias for --print-file-name"),
cl::aliasopt(PrintFileName), cl::Grouping);
cl::opt<bool> DebugSyms("debug-syms",
cl::desc("Show all symbols, even debugger only"),
cl::cat(NMCat));
cl::alias DebugSymsa("a", cl::desc("Alias for --debug-syms"),
cl::aliasopt(DebugSyms), cl::Grouping);
cl::opt<bool> NumericSort("numeric-sort", cl::desc("Sort symbols by address"),
cl::cat(NMCat));
cl::alias NumericSortn("n", cl::desc("Alias for --numeric-sort"),
cl::aliasopt(NumericSort), cl::Grouping);
cl::alias NumericSortv("v", cl::desc("Alias for --numeric-sort"),
cl::aliasopt(NumericSort), cl::Grouping);
cl::opt<bool> NoSort("no-sort", cl::desc("Show symbols in order encountered"),
cl::cat(NMCat));
cl::alias NoSortp("p", cl::desc("Alias for --no-sort"), cl::aliasopt(NoSort),
cl::Grouping);
cl::opt<bool> Demangle("demangle", cl::ZeroOrMore,
cl::desc("Demangle C++ symbol names"), cl::cat(NMCat));
cl::alias DemangleC("C", cl::desc("Alias for --demangle"),
cl::aliasopt(Demangle), cl::Grouping);
cl::opt<bool> NoDemangle("no-demangle", cl::init(false), cl::ZeroOrMore,
cl::desc("Don't demangle symbol names"),
cl::cat(NMCat));
cl::opt<bool> ReverseSort("reverse-sort", cl::desc("Sort in reverse order"),
cl::cat(NMCat));
cl::alias ReverseSortr("r", cl::desc("Alias for --reverse-sort"),
cl::aliasopt(ReverseSort), cl::Grouping);
cl::opt<bool> PrintSize("print-size",
cl::desc("Show symbol size as well as address"),
cl::cat(NMCat));
cl::alias PrintSizeS("S", cl::desc("Alias for --print-size"),
cl::aliasopt(PrintSize), cl::Grouping);
bool MachOPrintSizeWarning = false;
cl::opt<bool> SizeSort("size-sort", cl::desc("Sort symbols by size"),
cl::cat(NMCat));
cl::opt<bool> WithoutAliases("without-aliases", cl::Hidden,
cl::desc("Exclude aliases from output"),
cl::cat(NMCat));
cl::opt<bool> ArchiveMap("print-armap", cl::desc("Print the archive map"),
cl::cat(NMCat));
cl::alias ArchiveMaps("M", cl::desc("Alias for --print-armap"),
cl::aliasopt(ArchiveMap), cl::Grouping);
enum Radix { d, o, x };
cl::opt<Radix>
AddressRadix("radix", cl::desc("Radix (o/d/x) for printing symbol Values"),
cl::values(clEnumVal(d, "decimal"), clEnumVal(o, "octal"),
clEnumVal(x, "hexadecimal")),
cl::init(x), cl::cat(NMCat));
cl::alias RadixAlias("t", cl::desc("Alias for --radix"),
cl::aliasopt(AddressRadix));
cl::opt<bool> JustSymbolName("just-symbol-name",
cl::desc("Print just the symbol's name"),
cl::cat(NMCat));
cl::alias JustSymbolNames("j", cl::desc("Alias for --just-symbol-name"),
cl::aliasopt(JustSymbolName), cl::Grouping);
cl::opt<bool> SpecialSyms("special-syms",
cl::desc("No-op. Used for GNU compatibility only"));
cl::list<std::string> SegSect("s", cl::multi_val(2), cl::ZeroOrMore,
cl::value_desc("segment section"), cl::Hidden,
cl::desc("Dump only symbols from this segment "
"and section name, Mach-O only"),
cl::cat(NMCat));
cl::opt<bool> FormatMachOasHex("x",
cl::desc("Print symbol entry in hex, "
"Mach-O only"),
cl::Grouping, cl::cat(NMCat));
cl::opt<bool> AddDyldInfo("add-dyldinfo",
cl::desc("Add symbols from the dyldinfo not already "
"in the symbol table, Mach-O only"),
cl::cat(NMCat));
cl::opt<bool> NoDyldInfo("no-dyldinfo",
cl::desc("Don't add any symbols from the dyldinfo, "
"Mach-O only"),
cl::cat(NMCat));
cl::opt<bool> DyldInfoOnly("dyldinfo-only",
cl::desc("Show only symbols from the dyldinfo, "
"Mach-O only"),
cl::cat(NMCat));
cl::opt<bool> NoLLVMBitcode("no-llvm-bc",
cl::desc("Disable LLVM bitcode reader"),
cl::cat(NMCat));
cl::extrahelp HelpResponse("\nPass @FILE as argument to read options from FILE.\n");
bool PrintAddress = true;
bool MultipleFiles = false;
bool HadError = false;
std::string ToolName;
} // anonymous namespace
static void error(Twine Message, Twine Path = Twine()) {
HadError = true;
WithColor::error(errs(), ToolName) << Path << ": " << Message << ".\n";
}
static bool error(std::error_code EC, Twine Path = Twine()) {
if (EC) {
error(EC.message(), Path);
return true;
}
return false;
}
// This version of error() prints the archive name and member name, for example:
// "libx.a(foo.o)" after the ToolName before the error message. It sets
// HadError but returns allowing the code to move on to other archive members.
static void error(llvm::Error E, StringRef FileName, const Archive::Child &C,
StringRef ArchitectureName = StringRef()) {
HadError = true;
WithColor::error(errs(), ToolName) << FileName;
Expected<StringRef> NameOrErr = C.getName();
// TODO: if we have a error getting the name then it would be nice to print
// the index of which archive member this is and or its offset in the
// archive instead of "???" as the name.
if (!NameOrErr) {
consumeError(NameOrErr.takeError());
errs() << "(" << "???" << ")";
} else
errs() << "(" << NameOrErr.get() << ")";
if (!ArchitectureName.empty())
errs() << " (for architecture " << ArchitectureName << ") ";
std::string Buf;
raw_string_ostream OS(Buf);
logAllUnhandledErrors(std::move(E), OS);
OS.flush();
errs() << " " << Buf << "\n";
}
// This version of error() prints the file name and which architecture slice it
// is from, for example: "foo.o (for architecture i386)" after the ToolName
// before the error message. It sets HadError but returns allowing the code to
// move on to other architecture slices.
static void error(llvm::Error E, StringRef FileName,
StringRef ArchitectureName = StringRef()) {
HadError = true;
WithColor::error(errs(), ToolName) << FileName;
if (!ArchitectureName.empty())
errs() << " (for architecture " << ArchitectureName << ") ";
std::string Buf;
raw_string_ostream OS(Buf);
logAllUnhandledErrors(std::move(E), OS);
OS.flush();
errs() << " " << Buf << "\n";
}
namespace {
struct NMSymbol {
uint64_t Address;
uint64_t Size;
char TypeChar;
StringRef Name;
StringRef SectionName;
StringRef TypeName;
BasicSymbolRef Sym;
// The Sym field above points to the native symbol in the object file,
// for Mach-O when we are creating symbols from the dyld info the above
// pointer is null as there is no native symbol. In these cases the fields
// below are filled in to represent what would have been a Mach-O nlist
// native symbol.
uint32_t SymFlags;
SectionRef Section;
uint8_t NType;
uint8_t NSect;
uint16_t NDesc;
StringRef IndirectName;
};
} // anonymous namespace
static bool compareSymbolAddress(const NMSymbol &A, const NMSymbol &B) {
bool ADefined;
if (A.Sym.getRawDataRefImpl().p)
ADefined = !(A.Sym.getFlags() & SymbolRef::SF_Undefined);
else
ADefined = A.TypeChar != 'U';
bool BDefined;
if (B.Sym.getRawDataRefImpl().p)
BDefined = !(B.Sym.getFlags() & SymbolRef::SF_Undefined);
else
BDefined = B.TypeChar != 'U';
return std::make_tuple(ADefined, A.Address, A.Name, A.Size) <
std::make_tuple(BDefined, B.Address, B.Name, B.Size);
}
static bool compareSymbolSize(const NMSymbol &A, const NMSymbol &B) {
return std::make_tuple(A.Size, A.Name, A.Address) <
std::make_tuple(B.Size, B.Name, B.Address);
}
static bool compareSymbolName(const NMSymbol &A, const NMSymbol &B) {
return std::make_tuple(A.Name, A.Size, A.Address) <
std::make_tuple(B.Name, B.Size, B.Address);
}
static char isSymbolList64Bit(SymbolicFile &Obj) {
if (auto *IRObj = dyn_cast<IRObjectFile>(&Obj))
return Triple(IRObj->getTargetTriple()).isArch64Bit();
if (isa<COFFObjectFile>(Obj) || isa<COFFImportFile>(Obj))
return false;
if (isa<WasmObjectFile>(Obj))
return false;
if (MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(&Obj))
return MachO->is64Bit();
return cast<ELFObjectFileBase>(Obj).getBytesInAddress() == 8;
}
static StringRef CurrentFilename;
static std::vector<NMSymbol> SymbolList;
static char getSymbolNMTypeChar(IRObjectFile &Obj, basic_symbol_iterator I);
// darwinPrintSymbol() is used to print a symbol from a Mach-O file when the
// the OutputFormat is darwin or we are printing Mach-O symbols in hex. For
// the darwin format it produces the same output as darwin's nm(1) -m output
// and when printing Mach-O symbols in hex it produces the same output as
// darwin's nm(1) -x format.
static void darwinPrintSymbol(SymbolicFile &Obj, const NMSymbol &S,
char *SymbolAddrStr, const char *printBlanks,
const char *printDashes,
const char *printFormat) {
MachO::mach_header H;
MachO::mach_header_64 H_64;
uint32_t Filetype = MachO::MH_OBJECT;
uint32_t Flags = 0;
uint8_t NType = 0;
uint8_t NSect = 0;
uint16_t NDesc = 0;
uint32_t NStrx = 0;
uint64_t NValue = 0;
MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(&Obj);
if (Obj.isIR()) {
uint32_t SymFlags = S.Sym.getFlags();
if (SymFlags & SymbolRef::SF_Global)
NType |= MachO::N_EXT;
if (SymFlags & SymbolRef::SF_Hidden)
NType |= MachO::N_PEXT;
if (SymFlags & SymbolRef::SF_Undefined)
NType |= MachO::N_EXT | MachO::N_UNDF;
else {
// Here we have a symbol definition. So to fake out a section name we
// use 1, 2 and 3 for section numbers. See below where they are used to
// print out fake section names.
NType |= MachO::N_SECT;
if (SymFlags & SymbolRef::SF_Const)
NSect = 3;
else if (SymFlags & SymbolRef::SF_Executable)
NSect = 1;
else
NSect = 2;
}
if (SymFlags & SymbolRef::SF_Weak)
NDesc |= MachO::N_WEAK_DEF;
} else {
DataRefImpl SymDRI = S.Sym.getRawDataRefImpl();
if (MachO->is64Bit()) {
H_64 = MachO->MachOObjectFile::getHeader64();
Filetype = H_64.filetype;
Flags = H_64.flags;
if (SymDRI.p){
MachO::nlist_64 STE_64 = MachO->getSymbol64TableEntry(SymDRI);
NType = STE_64.n_type;
NSect = STE_64.n_sect;
NDesc = STE_64.n_desc;
NStrx = STE_64.n_strx;
NValue = STE_64.n_value;
} else {
NType = S.NType;
NSect = S.NSect;
NDesc = S.NDesc;
NStrx = 0;
NValue = S.Address;
}
} else {
H = MachO->MachOObjectFile::getHeader();
Filetype = H.filetype;
Flags = H.flags;
if (SymDRI.p){
MachO::nlist STE = MachO->getSymbolTableEntry(SymDRI);
NType = STE.n_type;
NSect = STE.n_sect;
NDesc = STE.n_desc;
NStrx = STE.n_strx;
NValue = STE.n_value;
} else {
NType = S.NType;
NSect = S.NSect;
NDesc = S.NDesc;
NStrx = 0;
NValue = S.Address;
}
}
}
// If we are printing Mach-O symbols in hex do that and return.
if (FormatMachOasHex) {
outs() << format(printFormat, NValue) << ' '
<< format("%02x %02x %04x %08x", NType, NSect, NDesc, NStrx) << ' '
<< S.Name;
if ((NType & MachO::N_TYPE) == MachO::N_INDR) {
outs() << " (indirect for ";
outs() << format(printFormat, NValue) << ' ';
StringRef IndirectName;
if (S.Sym.getRawDataRefImpl().p) {
if (MachO->getIndirectName(S.Sym.getRawDataRefImpl(), IndirectName))
outs() << "?)";
else
outs() << IndirectName << ")";
} else
outs() << S.IndirectName << ")";
}
outs() << "\n";
return;
}
if (PrintAddress) {
if ((NType & MachO::N_TYPE) == MachO::N_INDR)
strcpy(SymbolAddrStr, printBlanks);
if (Obj.isIR() && (NType & MachO::N_TYPE) == MachO::N_TYPE)
strcpy(SymbolAddrStr, printDashes);
outs() << SymbolAddrStr << ' ';
}
switch (NType & MachO::N_TYPE) {
case MachO::N_UNDF:
if (NValue != 0) {
outs() << "(common) ";
if (MachO::GET_COMM_ALIGN(NDesc) != 0)
outs() << "(alignment 2^" << (int)MachO::GET_COMM_ALIGN(NDesc) << ") ";
} else {
if ((NType & MachO::N_TYPE) == MachO::N_PBUD)
outs() << "(prebound ";
else
outs() << "(";
if ((NDesc & MachO::REFERENCE_TYPE) ==
MachO::REFERENCE_FLAG_UNDEFINED_LAZY)
outs() << "undefined [lazy bound]) ";
else if ((NDesc & MachO::REFERENCE_TYPE) ==
MachO::REFERENCE_FLAG_PRIVATE_UNDEFINED_LAZY)
outs() << "undefined [private lazy bound]) ";
else if ((NDesc & MachO::REFERENCE_TYPE) ==
MachO::REFERENCE_FLAG_PRIVATE_UNDEFINED_NON_LAZY)
outs() << "undefined [private]) ";
else
outs() << "undefined) ";
}
break;
case MachO::N_ABS:
outs() << "(absolute) ";
break;
case MachO::N_INDR:
outs() << "(indirect) ";
break;
case MachO::N_SECT: {
if (Obj.isIR()) {
// For llvm bitcode files print out a fake section name using the values
// use 1, 2 and 3 for section numbers as set above.
if (NSect == 1)
outs() << "(LTO,CODE) ";
else if (NSect == 2)
outs() << "(LTO,DATA) ";
else if (NSect == 3)
outs() << "(LTO,RODATA) ";
else
outs() << "(?,?) ";
break;
}
section_iterator Sec = SectionRef();
if (S.Sym.getRawDataRefImpl().p) {
Expected<section_iterator> SecOrErr =
MachO->getSymbolSection(S.Sym.getRawDataRefImpl());
if (!SecOrErr) {
consumeError(SecOrErr.takeError());
outs() << "(?,?) ";
break;
}
Sec = *SecOrErr;
if (Sec == MachO->section_end()) {
outs() << "(?,?) ";
break;
}
} else {
Sec = S.Section;
}
DataRefImpl Ref = Sec->getRawDataRefImpl();
StringRef SectionName;
if (Expected<StringRef> NameOrErr = MachO->getSectionName(Ref))
SectionName = *NameOrErr;
StringRef SegmentName = MachO->getSectionFinalSegmentName(Ref);
outs() << "(" << SegmentName << "," << SectionName << ") ";
break;
}
default:
outs() << "(?) ";
break;
}
if (NType & MachO::N_EXT) {
if (NDesc & MachO::REFERENCED_DYNAMICALLY)
outs() << "[referenced dynamically] ";
if (NType & MachO::N_PEXT) {
if ((NDesc & MachO::N_WEAK_DEF) == MachO::N_WEAK_DEF)
outs() << "weak private external ";
else
outs() << "private external ";
} else {
if ((NDesc & MachO::N_WEAK_REF) == MachO::N_WEAK_REF ||
(NDesc & MachO::N_WEAK_DEF) == MachO::N_WEAK_DEF) {
if ((NDesc & (MachO::N_WEAK_REF | MachO::N_WEAK_DEF)) ==
(MachO::N_WEAK_REF | MachO::N_WEAK_DEF))
outs() << "weak external automatically hidden ";
else
outs() << "weak external ";
} else
outs() << "external ";
}
} else {
if (NType & MachO::N_PEXT)
outs() << "non-external (was a private external) ";
else
outs() << "non-external ";
}
if (Filetype == MachO::MH_OBJECT) {
if (NDesc & MachO::N_NO_DEAD_STRIP)
outs() << "[no dead strip] ";
if ((NType & MachO::N_TYPE) != MachO::N_UNDF &&
NDesc & MachO::N_SYMBOL_RESOLVER)
outs() << "[symbol resolver] ";
if ((NType & MachO::N_TYPE) != MachO::N_UNDF && NDesc & MachO::N_ALT_ENTRY)
outs() << "[alt entry] ";
if ((NType & MachO::N_TYPE) != MachO::N_UNDF && NDesc & MachO::N_COLD_FUNC)
outs() << "[cold func] ";
}
if ((NDesc & MachO::N_ARM_THUMB_DEF) == MachO::N_ARM_THUMB_DEF)
outs() << "[Thumb] ";
if ((NType & MachO::N_TYPE) == MachO::N_INDR) {
outs() << S.Name << " (for ";
StringRef IndirectName;
if (MachO) {
if (S.Sym.getRawDataRefImpl().p) {
if (MachO->getIndirectName(S.Sym.getRawDataRefImpl(), IndirectName))
outs() << "?)";
else
outs() << IndirectName << ")";
} else
outs() << S.IndirectName << ")";
} else
outs() << "?)";
} else
outs() << S.Name;
if ((Flags & MachO::MH_TWOLEVEL) == MachO::MH_TWOLEVEL &&
(((NType & MachO::N_TYPE) == MachO::N_UNDF && NValue == 0) ||
(NType & MachO::N_TYPE) == MachO::N_PBUD)) {
uint32_t LibraryOrdinal = MachO::GET_LIBRARY_ORDINAL(NDesc);
if (LibraryOrdinal != 0) {
if (LibraryOrdinal == MachO::EXECUTABLE_ORDINAL)
outs() << " (from executable)";
else if (LibraryOrdinal == MachO::DYNAMIC_LOOKUP_ORDINAL)
outs() << " (dynamically looked up)";
else {
StringRef LibraryName;
if (!MachO ||
MachO->getLibraryShortNameByIndex(LibraryOrdinal - 1, LibraryName))
outs() << " (from bad library ordinal " << LibraryOrdinal << ")";
else
outs() << " (from " << LibraryName << ")";
}
}
}
outs() << "\n";
}
// Table that maps Darwin's Mach-O stab constants to strings to allow printing.
struct DarwinStabName {
uint8_t NType;
const char *Name;
};
static const struct DarwinStabName DarwinStabNames[] = {
{MachO::N_GSYM, "GSYM"},
{MachO::N_FNAME, "FNAME"},
{MachO::N_FUN, "FUN"},
{MachO::N_STSYM, "STSYM"},
{MachO::N_LCSYM, "LCSYM"},
{MachO::N_BNSYM, "BNSYM"},
{MachO::N_PC, "PC"},
{MachO::N_AST, "AST"},
{MachO::N_OPT, "OPT"},
{MachO::N_RSYM, "RSYM"},
{MachO::N_SLINE, "SLINE"},
{MachO::N_ENSYM, "ENSYM"},
{MachO::N_SSYM, "SSYM"},
{MachO::N_SO, "SO"},
{MachO::N_OSO, "OSO"},
{MachO::N_LSYM, "LSYM"},
{MachO::N_BINCL, "BINCL"},
{MachO::N_SOL, "SOL"},
{MachO::N_PARAMS, "PARAM"},
{MachO::N_VERSION, "VERS"},
{MachO::N_OLEVEL, "OLEV"},
{MachO::N_PSYM, "PSYM"},
{MachO::N_EINCL, "EINCL"},
{MachO::N_ENTRY, "ENTRY"},
{MachO::N_LBRAC, "LBRAC"},
{MachO::N_EXCL, "EXCL"},
{MachO::N_RBRAC, "RBRAC"},
{MachO::N_BCOMM, "BCOMM"},
{MachO::N_ECOMM, "ECOMM"},
{MachO::N_ECOML, "ECOML"},
{MachO::N_LENG, "LENG"},
};
static const char *getDarwinStabString(uint8_t NType) {
for (auto I : makeArrayRef(DarwinStabNames))
if (I.NType == NType)
return I.Name;
return nullptr;
}
// darwinPrintStab() prints the n_sect, n_desc along with a symbolic name of
// a stab n_type value in a Mach-O file.
static void darwinPrintStab(MachOObjectFile *MachO, const NMSymbol &S) {
MachO::nlist_64 STE_64;
MachO::nlist STE;
uint8_t NType;
uint8_t NSect;
uint16_t NDesc;
DataRefImpl SymDRI = S.Sym.getRawDataRefImpl();
if (MachO->is64Bit()) {
STE_64 = MachO->getSymbol64TableEntry(SymDRI);
NType = STE_64.n_type;
NSect = STE_64.n_sect;
NDesc = STE_64.n_desc;
} else {
STE = MachO->getSymbolTableEntry(SymDRI);
NType = STE.n_type;
NSect = STE.n_sect;
NDesc = STE.n_desc;
}
outs() << format(" %02x %04x ", NSect, NDesc);
if (const char *stabString = getDarwinStabString(NType))
outs() << format("%5.5s", stabString);
else
outs() << format(" %02x", NType);
}
static Optional<std::string> demangle(StringRef Name, bool StripUnderscore) {
if (StripUnderscore && !Name.empty() && Name[0] == '_')
Name = Name.substr(1);
if (!Name.startswith("_Z"))
return None;
int Status;
char *Undecorated =
itaniumDemangle(Name.str().c_str(), nullptr, nullptr, &Status);
if (Status != 0)
return None;
std::string S(Undecorated);
free(Undecorated);
return S;
}
static bool symbolIsDefined(const NMSymbol &Sym) {
return Sym.TypeChar != 'U' && Sym.TypeChar != 'w' && Sym.TypeChar != 'v';
}
static void writeFileName(raw_ostream &S, StringRef ArchiveName,
StringRef ArchitectureName) {
if (!ArchitectureName.empty())
S << "(for architecture " << ArchitectureName << "):";
if (OutputFormat == posix && !ArchiveName.empty())
S << ArchiveName << "[" << CurrentFilename << "]: ";
else {
if (!ArchiveName.empty())
S << ArchiveName << ":";
S << CurrentFilename << ": ";
}
}
static void sortAndPrintSymbolList(SymbolicFile &Obj, bool printName,
StringRef ArchiveName,
StringRef ArchitectureName) {
if (!NoSort) {
using Comparator = bool (*)(const NMSymbol &, const NMSymbol &);
Comparator Cmp;
if (NumericSort)
Cmp = &compareSymbolAddress;
else if (SizeSort)
Cmp = &compareSymbolSize;
else
Cmp = &compareSymbolName;
if (ReverseSort)
llvm::sort(SymbolList, [=](const NMSymbol &A, const NMSymbol &B) -> bool {
return Cmp(B, A);
});
else
llvm::sort(SymbolList, Cmp);
}
if (!PrintFileName) {
if (OutputFormat == posix && MultipleFiles && printName) {
outs() << '\n' << CurrentFilename << ":\n";
} else if (OutputFormat == bsd && MultipleFiles && printName) {
outs() << "\n" << CurrentFilename << ":\n";
} else if (OutputFormat == sysv) {
outs() << "\n\nSymbols from " << CurrentFilename << ":\n\n";
if (isSymbolList64Bit(Obj))
outs() << "Name Value Class Type"
<< " Size Line Section\n";
else
outs() << "Name Value Class Type"
<< " Size Line Section\n";
}
}
const char *printBlanks, *printDashes, *printFormat;
if (isSymbolList64Bit(Obj)) {
printBlanks = " ";
printDashes = "----------------";
switch (AddressRadix) {
case Radix::o:
printFormat = OutputFormat == posix ? "%" PRIo64 : "%016" PRIo64;
break;
case Radix::x:
printFormat = OutputFormat == posix ? "%" PRIx64 : "%016" PRIx64;
break;
default:
printFormat = OutputFormat == posix ? "%" PRId64 : "%016" PRId64;
}
} else {
printBlanks = " ";
printDashes = "--------";
switch (AddressRadix) {
case Radix::o:
printFormat = OutputFormat == posix ? "%" PRIo64 : "%08" PRIo64;
break;
case Radix::x:
printFormat = OutputFormat == posix ? "%" PRIx64 : "%08" PRIx64;
break;
default:
printFormat = OutputFormat == posix ? "%" PRId64 : "%08" PRId64;
}
}
for (const NMSymbol &S : SymbolList) {
uint32_t SymFlags;
std::string Name = S.Name.str();
MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(&Obj);
if (Demangle) {
if (Optional<std::string> Opt = demangle(S.Name, MachO))
Name = *Opt;
}
if (S.Sym.getRawDataRefImpl().p)
SymFlags = S.Sym.getFlags();
else
SymFlags = S.SymFlags;
bool Undefined = SymFlags & SymbolRef::SF_Undefined;
bool Global = SymFlags & SymbolRef::SF_Global;
bool Weak = SymFlags & SymbolRef::SF_Weak;
if ((!Undefined && UndefinedOnly) || (Undefined && DefinedOnly) ||
(!Global && ExternalOnly) || (Weak && NoWeakSymbols))
continue;
if (PrintFileName)
writeFileName(outs(), ArchiveName, ArchitectureName);
if ((JustSymbolName ||
(UndefinedOnly && MachO && OutputFormat != darwin)) &&
OutputFormat != posix) {
outs() << Name << "\n";
continue;
}
char SymbolAddrStr[23], SymbolSizeStr[23];
// If the format is SysV or the symbol isn't defined, then print spaces.
if (OutputFormat == sysv || !symbolIsDefined(S)) {
if (OutputFormat == posix) {
format(printFormat, S.Address)
.print(SymbolAddrStr, sizeof(SymbolAddrStr));
format(printFormat, S.Size).print(SymbolSizeStr, sizeof(SymbolSizeStr));
} else {
strcpy(SymbolAddrStr, printBlanks);
strcpy(SymbolSizeStr, printBlanks);
}
}
if (symbolIsDefined(S)) {
// Otherwise, print the symbol address and size.
if (Obj.isIR())
strcpy(SymbolAddrStr, printDashes);
else if (MachO && S.TypeChar == 'I')
strcpy(SymbolAddrStr, printBlanks);
else
format(printFormat, S.Address)
.print(SymbolAddrStr, sizeof(SymbolAddrStr));
format(printFormat, S.Size).print(SymbolSizeStr, sizeof(SymbolSizeStr));
}
// If OutputFormat is darwin or we are printing Mach-O symbols in hex and
// we have a MachOObjectFile, call darwinPrintSymbol to print as darwin's
// nm(1) -m output or hex, else if OutputFormat is darwin or we are
// printing Mach-O symbols in hex and not a Mach-O object fall back to
// OutputFormat bsd (see below).
if ((OutputFormat == darwin || FormatMachOasHex) && (MachO || Obj.isIR())) {
darwinPrintSymbol(Obj, S, SymbolAddrStr, printBlanks, printDashes,
printFormat);
} else if (OutputFormat == posix) {
outs() << Name << " " << S.TypeChar << " " << SymbolAddrStr << " "
<< (MachO ? "0" : SymbolSizeStr) << "\n";
} else if (OutputFormat == bsd || (OutputFormat == darwin && !MachO)) {
if (PrintAddress)
outs() << SymbolAddrStr << ' ';
if (PrintSize)
outs() << SymbolSizeStr << ' ';
outs() << S.TypeChar;
if (S.TypeChar == '-' && MachO)
darwinPrintStab(MachO, S);
outs() << " " << Name;
if (S.TypeChar == 'I' && MachO) {
outs() << " (indirect for ";
if (S.Sym.getRawDataRefImpl().p) {
StringRef IndirectName;
if (MachO->getIndirectName(S.Sym.getRawDataRefImpl(), IndirectName))
outs() << "?)";
else
outs() << IndirectName << ")";
} else
outs() << S.IndirectName << ")";
}
outs() << "\n";
} else if (OutputFormat == sysv) {
outs() << left_justify(Name, 20) << "|" << SymbolAddrStr << "| "
<< S.TypeChar << " |" << right_justify(S.TypeName, 18) << "|"
<< SymbolSizeStr << "| |" << S.SectionName << "\n";
}
}
SymbolList.clear();
}
static char getSymbolNMTypeChar(ELFObjectFileBase &Obj,
basic_symbol_iterator I) {
// OK, this is ELF
elf_symbol_iterator SymI(I);
Expected<elf_section_iterator> SecIOrErr = SymI->getSection();
if (!SecIOrErr) {
consumeError(SecIOrErr.takeError());
return '?';
}
uint8_t Binding = SymI->getBinding();
if (Binding == ELF::STB_GNU_UNIQUE)
return 'u';
assert(Binding != ELF::STB_WEAK && "STB_WEAK not tested in calling function");
if (Binding != ELF::STB_GLOBAL && Binding != ELF::STB_LOCAL)
return '?';
elf_section_iterator SecI = *SecIOrErr;
if (SecI != Obj.section_end()) {
uint32_t Type = SecI->getType();
uint64_t Flags = SecI->getFlags();
if (Flags & ELF::SHF_EXECINSTR)
return 't';
if (Type == ELF::SHT_NOBITS)
return 'b';
if (Flags & ELF::SHF_ALLOC)
return Flags & ELF::SHF_WRITE ? 'd' : 'r';
auto NameOrErr = SecI->getName();
if (!NameOrErr) {
consumeError(NameOrErr.takeError());
return '?';
}
if ((*NameOrErr).startswith(".debug"))
return 'N';
if (!(Flags & ELF::SHF_WRITE))
return 'n';
}
return '?';
}
static char getSymbolNMTypeChar(COFFObjectFile &Obj, symbol_iterator I) {
COFFSymbolRef Symb = Obj.getCOFFSymbol(*I);
// OK, this is COFF.
symbol_iterator SymI(I);
Expected<StringRef> Name = SymI->getName();
if (!Name) {
consumeError(Name.takeError());
return '?';
}
char Ret = StringSwitch<char>(*Name)
.StartsWith(".debug", 'N')
.StartsWith(".sxdata", 'N')
.Default('?');
if (Ret != '?')
return Ret;
uint32_t Characteristics = 0;
if (!COFF::isReservedSectionNumber(Symb.getSectionNumber())) {
Expected<section_iterator> SecIOrErr = SymI->getSection();
if (!SecIOrErr) {
consumeError(SecIOrErr.takeError());
return '?';
}
section_iterator SecI = *SecIOrErr;
const coff_section *Section = Obj.getCOFFSection(*SecI);
Characteristics = Section->Characteristics;
if (Expected<StringRef> NameOrErr = Obj.getSectionName(Section))
if (NameOrErr->startswith(".idata"))
return 'i';
}
switch (Symb.getSectionNumber()) {
case COFF::IMAGE_SYM_DEBUG:
return 'n';
default:
// Check section type.
if (Characteristics & COFF::IMAGE_SCN_CNT_CODE)
return 't';
if (Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA)
return Characteristics & COFF::IMAGE_SCN_MEM_WRITE ? 'd' : 'r';
if (Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA)
return 'b';
if (Characteristics & COFF::IMAGE_SCN_LNK_INFO)
return 'i';
// Check for section symbol.
if (Symb.isSectionDefinition())
return 's';
}
return '?';
}
static char getSymbolNMTypeChar(COFFImportFile &Obj) {
switch (Obj.getCOFFImportHeader()->getType()) {
case COFF::IMPORT_CODE:
return 't';
case COFF::IMPORT_DATA:
return 'd';
case COFF::IMPORT_CONST:
return 'r';
}
return '?';
}
static char getSymbolNMTypeChar(MachOObjectFile &Obj, basic_symbol_iterator I) {
DataRefImpl Symb = I->getRawDataRefImpl();
uint8_t NType = Obj.is64Bit() ? Obj.getSymbol64TableEntry(Symb).n_type
: Obj.getSymbolTableEntry(Symb).n_type;