aboutsummaryrefslogtreecommitdiff
path: root/gdb/symtab.h
blob: 29e7d703b9ed8a95fd009c6f061814a1343459e9 (plain)
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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
/* Symbol table definitions for GDB.

   Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
   1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009, 2010,
   2011 Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#if !defined (SYMTAB_H)
#define SYMTAB_H 1

/* Opaque declarations.  */
struct ui_file;
struct frame_info;
struct symbol;
struct obstack;
struct objfile;
struct block;
struct blockvector;
struct axs_value;
struct agent_expr;
struct program_space;

/* Some of the structures in this file are space critical.
   The space-critical structures are:

     struct general_symbol_info
     struct symbol
     struct partial_symbol

   These structures are laid out to encourage good packing.
   They use ENUM_BITFIELD and short int fields, and they order the
   structure members so that fields less than a word are next
   to each other so they can be packed together.  */

/* Rearranged: used ENUM_BITFIELD and rearranged field order in
   all the space critical structures (plus struct minimal_symbol).
   Memory usage dropped from 99360768 bytes to 90001408 bytes.
   I measured this with before-and-after tests of
   "HEAD-old-gdb -readnow HEAD-old-gdb" and
   "HEAD-new-gdb -readnow HEAD-old-gdb" on native i686-pc-linux-gnu,
   red hat linux 8, with LD_LIBRARY_PATH=/usr/lib/debug,
   typing "maint space 1" at the first command prompt.

   Here is another measurement (from andrew c):
     # no /usr/lib/debug, just plain glibc, like a normal user
     gdb HEAD-old-gdb
     (gdb) break internal_error
     (gdb) run
     (gdb) maint internal-error
     (gdb) backtrace
     (gdb) maint space 1

   gdb gdb_6_0_branch  2003-08-19  space used: 8896512
   gdb HEAD            2003-08-19  space used: 8904704
   gdb HEAD            2003-08-21  space used: 8396800 (+symtab.h)
   gdb HEAD            2003-08-21  space used: 8265728 (+gdbtypes.h)

   The third line shows the savings from the optimizations in symtab.h.
   The fourth line shows the savings from the optimizations in
   gdbtypes.h.  Both optimizations are in gdb HEAD now.

   --chastain 2003-08-21  */

/* Struct for storing C++ specific information.  Allocated when needed.  */

struct cplus_specific
{
  char *demangled_name;
};

/* Define a structure for the information that is common to all symbol types,
   including minimal symbols, partial symbols, and full symbols.  In a
   multilanguage environment, some language specific information may need to
   be recorded along with each symbol.  */

/* This structure is space critical.  See space comments at the top.  */

struct general_symbol_info
{
  /* Name of the symbol.  This is a required field.  Storage for the
     name is allocated on the objfile_obstack for the associated
     objfile.  For languages like C++ that make a distinction between
     the mangled name and demangled name, this is the mangled
     name.  */

  char *name;

  /* Value of the symbol.  Which member of this union to use, and what
     it means, depends on what kind of symbol this is and its
     SYMBOL_CLASS.  See comments there for more details.  All of these
     are in host byte order (though what they point to might be in
     target byte order, e.g. LOC_CONST_BYTES).  */

  union
  {
    /* The fact that this is a long not a LONGEST mainly limits the
       range of a LOC_CONST.  Since LOC_CONST_BYTES exists, I'm not
       sure that is a big deal.  */
    long ivalue;

    struct block *block;

    gdb_byte *bytes;

    CORE_ADDR address;

    /* For opaque typedef struct chain.  */

    struct symbol *chain;
  }
  value;

  /* Since one and only one language can apply, wrap the language specific
     information inside a union.  */

  union
  {
    /* This is used by languages which wish to store a demangled name.
       currently used by Ada, Java, and Objective C.  */
    struct mangled_lang
    {
      char *demangled_name;
    }
    mangled_lang;

    struct cplus_specific *cplus_specific;
  }
  language_specific;

  /* Record the source code language that applies to this symbol.
     This is used to select one of the fields from the language specific
     union above.  */

  ENUM_BITFIELD(language) language : 8;

  /* Which section is this symbol in?  This is an index into
     section_offsets for this objfile.  Negative means that the symbol
     does not get relocated relative to a section.
     Disclaimer: currently this is just used for xcoff, so don't
     expect all symbol-reading code to set it correctly (the ELF code
     also tries to set it correctly).  */

  short section;

  /* The section associated with this symbol.  It can be NULL.  */

  struct obj_section *obj_section;
};

extern void symbol_set_demangled_name (struct general_symbol_info *, char *,
                                       struct objfile *);

extern char *symbol_get_demangled_name (const struct general_symbol_info *);

extern CORE_ADDR symbol_overlayed_address (CORE_ADDR, struct obj_section *);

/* Note that all the following SYMBOL_* macros are used with the
   SYMBOL argument being either a partial symbol, a minimal symbol or
   a full symbol.  All three types have a ginfo field.  In particular
   the SYMBOL_SET_LANGUAGE, SYMBOL_DEMANGLED_NAME, etc.
   macros cannot be entirely substituted by
   functions, unless the callers are changed to pass in the ginfo
   field only, instead of the SYMBOL parameter.  */

#define SYMBOL_VALUE(symbol)		(symbol)->ginfo.value.ivalue
#define SYMBOL_VALUE_ADDRESS(symbol)	(symbol)->ginfo.value.address
#define SYMBOL_VALUE_BYTES(symbol)	(symbol)->ginfo.value.bytes
#define SYMBOL_BLOCK_VALUE(symbol)	(symbol)->ginfo.value.block
#define SYMBOL_VALUE_CHAIN(symbol)	(symbol)->ginfo.value.chain
#define SYMBOL_LANGUAGE(symbol)		(symbol)->ginfo.language
#define SYMBOL_SECTION(symbol)		(symbol)->ginfo.section
#define SYMBOL_OBJ_SECTION(symbol)	(symbol)->ginfo.obj_section

/* Initializes the language dependent portion of a symbol
   depending upon the language for the symbol.  */
#define SYMBOL_SET_LANGUAGE(symbol,language) \
  (symbol_set_language (&(symbol)->ginfo, (language)))
extern void symbol_set_language (struct general_symbol_info *symbol,
                                 enum language language);

/* Set just the linkage name of a symbol; do not try to demangle
   it.  Used for constructs which do not have a mangled name,
   e.g. struct tags.  Unlike SYMBOL_SET_NAMES, linkage_name must
   be terminated and either already on the objfile's obstack or
   permanently allocated.  */
#define SYMBOL_SET_LINKAGE_NAME(symbol,linkage_name) \
  (symbol)->ginfo.name = (linkage_name)

/* Set the linkage and natural names of a symbol, by demangling
   the linkage name.  */
#define SYMBOL_SET_NAMES(symbol,linkage_name,len,copy_name,objfile)	\
  symbol_set_names (&(symbol)->ginfo, linkage_name, len, copy_name, objfile)
extern void symbol_set_names (struct general_symbol_info *symbol,
			      const char *linkage_name, int len, int copy_name,
			      struct objfile *objfile);

/* Now come lots of name accessor macros.  Short version as to when to
   use which: Use SYMBOL_NATURAL_NAME to refer to the name of the
   symbol in the original source code.  Use SYMBOL_LINKAGE_NAME if you
   want to know what the linker thinks the symbol's name is.  Use
   SYMBOL_PRINT_NAME for output.  Use SYMBOL_DEMANGLED_NAME if you
   specifically need to know whether SYMBOL_NATURAL_NAME and
   SYMBOL_LINKAGE_NAME are different.  */

/* Return SYMBOL's "natural" name, i.e. the name that it was called in
   the original source code.  In languages like C++ where symbols may
   be mangled for ease of manipulation by the linker, this is the
   demangled name.  */

#define SYMBOL_NATURAL_NAME(symbol) \
  (symbol_natural_name (&(symbol)->ginfo))
extern char *symbol_natural_name (const struct general_symbol_info *symbol);

/* Return SYMBOL's name from the point of view of the linker.  In
   languages like C++ where symbols may be mangled for ease of
   manipulation by the linker, this is the mangled name; otherwise,
   it's the same as SYMBOL_NATURAL_NAME.  */

#define SYMBOL_LINKAGE_NAME(symbol)	(symbol)->ginfo.name

/* Return the demangled name for a symbol based on the language for
   that symbol.  If no demangled name exists, return NULL.  */
#define SYMBOL_DEMANGLED_NAME(symbol) \
  (symbol_demangled_name (&(symbol)->ginfo))
extern char *symbol_demangled_name (const struct general_symbol_info *symbol);

/* Macro that returns a version of the name of a symbol that is
   suitable for output.  In C++ this is the "demangled" form of the
   name if demangle is on and the "mangled" form of the name if
   demangle is off.  In other languages this is just the symbol name.
   The result should never be NULL.  Don't use this for internal
   purposes (e.g. storing in a hashtable): it's only suitable for
   output.  */

#define SYMBOL_PRINT_NAME(symbol)					\
  (demangle ? SYMBOL_NATURAL_NAME (symbol) : SYMBOL_LINKAGE_NAME (symbol))

/* Macro that tests a symbol for a match against a specified name string.
   First test the unencoded name, then looks for and test a C++ encoded
   name if it exists.  Note that whitespace is ignored while attempting to
   match a C++ encoded name, so that "foo::bar(int,long)" is the same as
   "foo :: bar (int, long)".
   Evaluates to zero if the match fails, or nonzero if it succeeds.  */

/* Macro that tests a symbol for a match against a specified name
   string.  It tests against SYMBOL_NATURAL_NAME, and it ignores
   whitespace and trailing parentheses.  (See strcmp_iw for details
   about its behavior.)  */

#define SYMBOL_MATCHES_NATURAL_NAME(symbol, name)			\
  (strcmp_iw (SYMBOL_NATURAL_NAME (symbol), (name)) == 0)

/* Macro that returns the name to be used when sorting and searching symbols.
   In  C++, Chill, and Java, we search for the demangled form of a name,
   and so sort symbols accordingly.  In Ada, however, we search by mangled
   name.  If there is no distinct demangled name, then SYMBOL_SEARCH_NAME
   returns the same value (same pointer) as SYMBOL_LINKAGE_NAME.  */
#define SYMBOL_SEARCH_NAME(symbol)					 \
   (symbol_search_name (&(symbol)->ginfo))
extern char *symbol_search_name (const struct general_symbol_info *);

/* Analogous to SYMBOL_MATCHES_NATURAL_NAME, but uses the search
   name.  */
#define SYMBOL_MATCHES_SEARCH_NAME(symbol, name)			\
  (strcmp_iw (SYMBOL_SEARCH_NAME (symbol), (name)) == 0)

/* Classification types for a minimal symbol.  These should be taken as
   "advisory only", since if gdb can't easily figure out a
   classification it simply selects mst_unknown.  It may also have to
   guess when it can't figure out which is a better match between two
   types (mst_data versus mst_bss) for example.  Since the minimal
   symbol info is sometimes derived from the BFD library's view of a
   file, we need to live with what information bfd supplies.  */

enum minimal_symbol_type
{
  mst_unknown = 0,		/* Unknown type, the default */
  mst_text,			/* Generally executable instructions */
  mst_text_gnu_ifunc,		/* Executable code returning address
				   of executable code */
  mst_slot_got_plt,		/* GOT entries for .plt sections */
  mst_data,			/* Generally initialized data */
  mst_bss,			/* Generally uninitialized data */
  mst_abs,			/* Generally absolute (nonrelocatable) */
  /* GDB uses mst_solib_trampoline for the start address of a shared
     library trampoline entry.  Breakpoints for shared library functions
     are put there if the shared library is not yet loaded.
     After the shared library is loaded, lookup_minimal_symbol will
     prefer the minimal symbol from the shared library (usually
     a mst_text symbol) over the mst_solib_trampoline symbol, and the
     breakpoints will be moved to their true address in the shared
     library via breakpoint_re_set.  */
  mst_solib_trampoline,		/* Shared library trampoline code */
  /* For the mst_file* types, the names are only guaranteed to be unique
     within a given .o file.  */
  mst_file_text,		/* Static version of mst_text */
  mst_file_data,		/* Static version of mst_data */
  mst_file_bss			/* Static version of mst_bss */
};

/* Define a simple structure used to hold some very basic information about
   all defined global symbols (text, data, bss, abs, etc).  The only required
   information is the general_symbol_info.

   In many cases, even if a file was compiled with no special options for
   debugging at all, as long as was not stripped it will contain sufficient
   information to build a useful minimal symbol table using this structure.
   Even when a file contains enough debugging information to build a full
   symbol table, these minimal symbols are still useful for quickly mapping
   between names and addresses, and vice versa.  They are also sometimes
   used to figure out what full symbol table entries need to be read in.  */

struct minimal_symbol
{

  /* The general symbol info required for all types of symbols.

     The SYMBOL_VALUE_ADDRESS contains the address that this symbol
     corresponds to.  */

  struct general_symbol_info ginfo;

  /* Size of this symbol.  end_psymtab in dbxread.c uses this
     information to calculate the end of the partial symtab based on the
     address of the last symbol plus the size of the last symbol.  */

  unsigned long size;

  /* Which source file is this symbol in?  Only relevant for mst_file_*.  */
  char *filename;

  /* Classification type for this minimal symbol.  */

  ENUM_BITFIELD(minimal_symbol_type) type : 8;

  /* Two flag bits provided for the use of the target.  */
  unsigned int target_flag_1 : 1;
  unsigned int target_flag_2 : 1;

  /* Minimal symbols with the same hash key are kept on a linked
     list.  This is the link.  */

  struct minimal_symbol *hash_next;

  /* Minimal symbols are stored in two different hash tables.  This is
     the `next' pointer for the demangled hash table.  */

  struct minimal_symbol *demangled_hash_next;
};

#define MSYMBOL_TARGET_FLAG_1(msymbol)  (msymbol)->target_flag_1
#define MSYMBOL_TARGET_FLAG_2(msymbol)  (msymbol)->target_flag_2
#define MSYMBOL_SIZE(msymbol)		(msymbol)->size
#define MSYMBOL_TYPE(msymbol)		(msymbol)->type



/* Represent one symbol name; a variable, constant, function or typedef.  */

/* Different name domains for symbols.  Looking up a symbol specifies a
   domain and ignores symbol definitions in other name domains.  */

typedef enum domain_enum_tag
{
  /* UNDEF_DOMAIN is used when a domain has not been discovered or
     none of the following apply.  This usually indicates an error either
     in the symbol information or in gdb's handling of symbols.  */

  UNDEF_DOMAIN,

  /* VAR_DOMAIN is the usual domain.  In C, this contains variables,
     function names, typedef names and enum type values.  */

  VAR_DOMAIN,

  /* STRUCT_DOMAIN is used in C to hold struct, union and enum type names.
     Thus, if `struct foo' is used in a C program, it produces a symbol named
     `foo' in the STRUCT_DOMAIN.  */

  STRUCT_DOMAIN,

  /* LABEL_DOMAIN may be used for names of labels (for gotos).  */

  LABEL_DOMAIN
} domain_enum;

/* Searching domains, used for `search_symbols'.  Element numbers are
   hardcoded in GDB, check all enum uses before changing it.  */

enum search_domain
{
  /* Everything in VAR_DOMAIN minus FUNCTIONS_DOMAIN and
     TYPES_DOMAIN.  */
  VARIABLES_DOMAIN = 0,

  /* All functions -- for some reason not methods, though.  */
  FUNCTIONS_DOMAIN = 1,

  /* All defined types */
  TYPES_DOMAIN = 2,

  /* Any type.  */
  ALL_DOMAIN = 3
};

/* An address-class says where to find the value of a symbol.  */

enum address_class
{
  /* Not used; catches errors.  */

  LOC_UNDEF,

  /* Value is constant int SYMBOL_VALUE, host byteorder.  */

  LOC_CONST,

  /* Value is at fixed address SYMBOL_VALUE_ADDRESS.  */

  LOC_STATIC,

  /* Value is in register.  SYMBOL_VALUE is the register number
     in the original debug format.  SYMBOL_REGISTER_OPS holds a
     function that can be called to transform this into the
     actual register number this represents in a specific target
     architecture (gdbarch).

     For some symbol formats (stabs, for some compilers at least),
     the compiler generates two symbols, an argument and a register.
     In some cases we combine them to a single LOC_REGISTER in symbol
     reading, but currently not for all cases (e.g. it's passed on the
     stack and then loaded into a register).  */

  LOC_REGISTER,

  /* It's an argument; the value is at SYMBOL_VALUE offset in arglist.  */

  LOC_ARG,

  /* Value address is at SYMBOL_VALUE offset in arglist.  */

  LOC_REF_ARG,

  /* Value is in specified register.  Just like LOC_REGISTER except the
     register holds the address of the argument instead of the argument
     itself.  This is currently used for the passing of structs and unions
     on sparc and hppa.  It is also used for call by reference where the
     address is in a register, at least by mipsread.c.  */

  LOC_REGPARM_ADDR,

  /* Value is a local variable at SYMBOL_VALUE offset in stack frame.  */

  LOC_LOCAL,

  /* Value not used; definition in SYMBOL_TYPE.  Symbols in the domain
     STRUCT_DOMAIN all have this class.  */

  LOC_TYPEDEF,

  /* Value is address SYMBOL_VALUE_ADDRESS in the code.  */

  LOC_LABEL,

  /* In a symbol table, value is SYMBOL_BLOCK_VALUE of a `struct block'.
     In a partial symbol table, SYMBOL_VALUE_ADDRESS is the start address
     of the block.  Function names have this class.  */

  LOC_BLOCK,

  /* Value is a constant byte-sequence pointed to by SYMBOL_VALUE_BYTES, in
     target byte order.  */

  LOC_CONST_BYTES,

  /* Value is at fixed address, but the address of the variable has
     to be determined from the minimal symbol table whenever the
     variable is referenced.
     This happens if debugging information for a global symbol is
     emitted and the corresponding minimal symbol is defined
     in another object file or runtime common storage.
     The linker might even remove the minimal symbol if the global
     symbol is never referenced, in which case the symbol remains
     unresolved.
     
     GDB would normally find the symbol in the minimal symbol table if it will
     not find it in the full symbol table.  But a reference to an external
     symbol in a local block shadowing other definition requires full symbol
     without possibly having its address available for LOC_STATIC.  Testcase
     is provided as `gdb.dwarf2/dw2-unresolved.exp'.  */

  LOC_UNRESOLVED,

  /* The variable does not actually exist in the program.
     The value is ignored.  */

  LOC_OPTIMIZED_OUT,

  /* The variable's address is computed by a set of location
     functions (see "struct symbol_computed_ops" below).  */
  LOC_COMPUTED,
};

/* The methods needed to implement LOC_COMPUTED.  These methods can
   use the symbol's .aux_value for additional per-symbol information.

   At present this is only used to implement location expressions.  */

struct symbol_computed_ops
{

  /* Return the value of the variable SYMBOL, relative to the stack
     frame FRAME.  If the variable has been optimized out, return
     zero.

     Iff `read_needs_frame (SYMBOL)' is zero, then FRAME may be zero.  */

  struct value *(*read_variable) (struct symbol * symbol,
				  struct frame_info * frame);

  /* Return non-zero if we need a frame to find the value of the SYMBOL.  */
  int (*read_needs_frame) (struct symbol * symbol);

  /* Write to STREAM a natural-language description of the location of
     SYMBOL, in the context of ADDR.  */
  void (*describe_location) (struct symbol * symbol, CORE_ADDR addr,
			     struct ui_file * stream);

  /* Tracepoint support.  Append bytecodes to the tracepoint agent
     expression AX that push the address of the object SYMBOL.  Set
     VALUE appropriately.  Note --- for objects in registers, this
     needn't emit any code; as long as it sets VALUE properly, then
     the caller will generate the right code in the process of
     treating this as an lvalue or rvalue.  */

  void (*tracepoint_var_ref) (struct symbol *symbol, struct gdbarch *gdbarch,
			      struct agent_expr *ax, struct axs_value *value);
};

/* Functions used with LOC_REGISTER and LOC_REGPARM_ADDR.  */

struct symbol_register_ops
{
  int (*register_number) (struct symbol *symbol, struct gdbarch *gdbarch);
};

/* This structure is space critical.  See space comments at the top.  */

struct symbol
{

  /* The general symbol info required for all types of symbols.  */

  struct general_symbol_info ginfo;

  /* Data type of value */

  struct type *type;

  /* The symbol table containing this symbol.  This is the file
     associated with LINE.  It can be NULL during symbols read-in but it is
     never NULL during normal operation.  */
  struct symtab *symtab;

  /* Domain code.  */

  ENUM_BITFIELD(domain_enum_tag) domain : 6;

  /* Address class */
  /* NOTE: cagney/2003-11-02: The fields "aclass" and "ops" contain
     overlapping information.  By creating a per-aclass ops vector, or
     using the aclass as an index into an ops table, the aclass and
     ops fields can be merged.  The latter, for instance, would shave
     32-bits from each symbol (relative to a symbol lookup, any table
     index overhead would be in the noise).  */

  ENUM_BITFIELD(address_class) aclass : 6;

  /* Whether this is an argument.  */

  unsigned is_argument : 1;

  /* Whether this is an inlined function (class LOC_BLOCK only).  */
  unsigned is_inlined : 1;

  /* True if this is a C++ function symbol with template arguments.
     In this case the symbol is really a "struct template_symbol".  */
  unsigned is_cplus_template_function : 1;

  /* Line number of this symbol's definition, except for inlined
     functions.  For an inlined function (class LOC_BLOCK and
     SYMBOL_INLINED set) this is the line number of the function's call
     site.  Inlined function symbols are not definitions, and they are
     never found by symbol table lookup.

     FIXME: Should we really make the assumption that nobody will try
     to debug files longer than 64K lines?  What about machine
     generated programs?  */

  unsigned short line;

  /* Method's for symbol's of this class.  */
  /* NOTE: cagney/2003-11-02: See comment above attached to "aclass".  */

  union
    {
      /* Used with LOC_COMPUTED.  */
      const struct symbol_computed_ops *ops_computed;

      /* Used with LOC_REGISTER and LOC_REGPARM_ADDR.  */
      const struct symbol_register_ops *ops_register;
    } ops;

  /* An arbitrary data pointer, allowing symbol readers to record
     additional information on a per-symbol basis.  Note that this data
     must be allocated using the same obstack as the symbol itself.  */
  /* So far it is only used by LOC_COMPUTED to
     find the location information.  For a LOC_BLOCK symbol
     for a function in a compilation unit compiled with DWARF 2
     information, this is information used internally by the DWARF 2
     code --- specifically, the location expression for the frame
     base for this function.  */
  /* FIXME drow/2003-02-21: For the LOC_BLOCK case, it might be better
     to add a magic symbol to the block containing this information,
     or to have a generic debug info annotation slot for symbols.  */

  void *aux_value;

  struct symbol *hash_next;
};


#define SYMBOL_DOMAIN(symbol)	(symbol)->domain
#define SYMBOL_CLASS(symbol)		(symbol)->aclass
#define SYMBOL_IS_ARGUMENT(symbol)	(symbol)->is_argument
#define SYMBOL_INLINED(symbol)		(symbol)->is_inlined
#define SYMBOL_IS_CPLUS_TEMPLATE_FUNCTION(symbol) \
  (symbol)->is_cplus_template_function
#define SYMBOL_TYPE(symbol)		(symbol)->type
#define SYMBOL_LINE(symbol)		(symbol)->line
#define SYMBOL_SYMTAB(symbol)		(symbol)->symtab
#define SYMBOL_COMPUTED_OPS(symbol)     (symbol)->ops.ops_computed
#define SYMBOL_REGISTER_OPS(symbol)     (symbol)->ops.ops_register
#define SYMBOL_LOCATION_BATON(symbol)   (symbol)->aux_value

/* An instance of this type is used to represent a C++ template
   function.  It includes a "struct symbol" as a kind of base class;
   users downcast to "struct template_symbol *" when needed.  A symbol
   is really of this type iff SYMBOL_IS_CPLUS_TEMPLATE_FUNCTION is
   true.  */

struct template_symbol
{
  /* The base class.  */
  struct symbol base;

  /* The number of template arguments.  */
  int n_template_arguments;

  /* The template arguments.  This is an array with
     N_TEMPLATE_ARGUMENTS elements.  */
  struct symbol **template_arguments;
};


/* Each item represents a line-->pc (or the reverse) mapping.  This is
   somewhat more wasteful of space than one might wish, but since only
   the files which are actually debugged are read in to core, we don't
   waste much space.  */

struct linetable_entry
{
  int line;
  CORE_ADDR pc;
};

/* The order of entries in the linetable is significant.  They should
   be sorted by increasing values of the pc field.  If there is more than
   one entry for a given pc, then I'm not sure what should happen (and
   I not sure whether we currently handle it the best way).

   Example: a C for statement generally looks like this

   10   0x100   - for the init/test part of a for stmt.
   20   0x200
   30   0x300
   10   0x400   - for the increment part of a for stmt.

   If an entry has a line number of zero, it marks the start of a PC
   range for which no line number information is available.  It is
   acceptable, though wasteful of table space, for such a range to be
   zero length.  */

struct linetable
{
  int nitems;

  /* Actually NITEMS elements.  If you don't like this use of the
     `struct hack', you can shove it up your ANSI (seriously, if the
     committee tells us how to do it, we can probably go along).  */
  struct linetable_entry item[1];
};

/* How to relocate the symbols from each section in a symbol file.
   Each struct contains an array of offsets.
   The ordering and meaning of the offsets is file-type-dependent;
   typically it is indexed by section numbers or symbol types or
   something like that.

   To give us flexibility in changing the internal representation
   of these offsets, the ANOFFSET macro must be used to insert and
   extract offset values in the struct.  */

struct section_offsets
{
  CORE_ADDR offsets[1];		/* As many as needed.  */
};

#define	ANOFFSET(secoff, whichone) \
  ((whichone == -1)			  \
   ? (internal_error (__FILE__, __LINE__, \
		      _("Section index is uninitialized")), -1) \
   : secoff->offsets[whichone])

/* The size of a section_offsets table for N sections.  */
#define SIZEOF_N_SECTION_OFFSETS(n) \
  (sizeof (struct section_offsets) \
   + sizeof (((struct section_offsets *) 0)->offsets) * ((n)-1))

/* Each source file or header is represented by a struct symtab.
   These objects are chained through the `next' field.  */

struct symtab
{
  /* Unordered chain of all existing symtabs of this objfile.  */

  struct symtab *next;

  /* List of all symbol scope blocks for this symtab.  May be shared
     between different symtabs (and normally is for all the symtabs
     in a given compilation unit).  */

  struct blockvector *blockvector;

  /* Table mapping core addresses to line numbers for this file.
     Can be NULL if none.  Never shared between different symtabs.  */

  struct linetable *linetable;

  /* Section in objfile->section_offsets for the blockvector and
     the linetable.  Probably always SECT_OFF_TEXT.  */

  int block_line_section;

  /* If several symtabs share a blockvector, exactly one of them
     should be designated the primary, so that the blockvector
     is relocated exactly once by objfile_relocate.  */

  int primary;

  /* The macro table for this symtab.  Like the blockvector, this
     may be shared between different symtabs --- and normally is for
     all the symtabs in a given compilation unit.  */
  struct macro_table *macro_table;

  /* Name of this source file.  */

  char *filename;

  /* Directory in which it was compiled, or NULL if we don't know.  */

  char *dirname;

  /* Total number of lines found in source file.  */

  int nlines;

  /* line_charpos[N] is the position of the (N-1)th line of the
     source file.  "position" means something we can lseek() to; it
     is not guaranteed to be useful any other way.  */

  int *line_charpos;

  /* Language of this source file.  */

  enum language language;

  /* String that identifies the format of the debugging information, such
     as "stabs", "dwarf 1", "dwarf 2", "coff", etc.  This is mostly useful
     for automated testing of gdb but may also be information that is
     useful to the user.  */

  const char *debugformat;

  /* String of producer version information.  May be zero.  */

  const char *producer;

  /* Full name of file as found by searching the source path.
     NULL if not yet known.  */

  char *fullname;

  /* Object file from which this symbol information was read.  */

  struct objfile *objfile;

};

#define BLOCKVECTOR(symtab)	(symtab)->blockvector
#define LINETABLE(symtab)	(symtab)->linetable
#define SYMTAB_PSPACE(symtab)	(symtab)->objfile->pspace


/* The virtual function table is now an array of structures which have the
   form { int16 offset, delta; void *pfn; }. 

   In normal virtual function tables, OFFSET is unused.
   DELTA is the amount which is added to the apparent object's base
   address in order to point to the actual object to which the
   virtual function should be applied.
   PFN is a pointer to the virtual function.

   Note that this macro is g++ specific (FIXME).  */

#define VTBL_FNADDR_OFFSET 2

/* External variables and functions for the objects described above.  */

/* See the comment in symfile.c about how current_objfile is used.  */

extern struct objfile *current_objfile;

/* True if we are nested inside psymtab_to_symtab.  */

extern int currently_reading_symtab;

/* From utils.c.  */
extern int demangle;
extern int asm_demangle;

/* symtab.c lookup functions */

extern const char multiple_symbols_ask[];
extern const char multiple_symbols_all[];
extern const char multiple_symbols_cancel[];

const char *multiple_symbols_select_mode (void);

int symbol_matches_domain (enum language symbol_language, 
			   domain_enum symbol_domain,
			   domain_enum domain);

/* lookup a symbol table by source file name.  */

extern struct symtab *lookup_symtab (const char *);

/* lookup a symbol by name (optional block) in language.  */

extern struct symbol *lookup_symbol_in_language (const char *,
						 const struct block *,
						 const domain_enum,
						 enum language,
						 int *);

/* lookup a symbol by name (optional block, optional symtab)
   in the current language.  */

extern struct symbol *lookup_symbol (const char *, const struct block *,
				     const domain_enum, int *);

/* A default version of lookup_symbol_nonlocal for use by languages
   that can't think of anything better to do.  */

extern struct symbol *basic_lookup_symbol_nonlocal (const char *,
						    const struct block *,
						    const domain_enum);

/* Some helper functions for languages that need to write their own
   lookup_symbol_nonlocal functions.  */

/* Lookup a symbol in the static block associated to BLOCK, if there
   is one; do nothing if BLOCK is NULL or a global block.  */

extern struct symbol *lookup_symbol_static (const char *name,
					    const struct block *block,
					    const domain_enum domain);

/* Lookup a symbol in all files' global blocks (searching psymtabs if
   necessary).  */

extern struct symbol *lookup_symbol_global (const char *name,
					    const struct block *block,
					    const domain_enum domain);

/* Lookup a symbol within the block BLOCK.  This, unlike
   lookup_symbol_block, will set SYMTAB and BLOCK_FOUND correctly, and
   will fix up the symbol if necessary.  */

extern struct symbol *lookup_symbol_aux_block (const char *name,
					       const struct block *block,
					       const domain_enum domain);

/* Lookup a symbol only in the file static scope of all the objfiles.  */

struct symbol *lookup_static_symbol_aux (const char *name,
					 const domain_enum domain);


/* lookup a symbol by name, within a specified block.  */

extern struct symbol *lookup_block_symbol (const struct block *, const char *,
					   const domain_enum);

/* lookup a [struct, union, enum] by name, within a specified block.  */

extern struct type *lookup_struct (char *, struct block *);

extern struct type *lookup_union (char *, struct block *);

extern struct type *lookup_enum (char *, struct block *);

/* from blockframe.c: */

/* lookup the function symbol corresponding to the address.  */

extern struct symbol *find_pc_function (CORE_ADDR);

/* lookup the function corresponding to the address and section.  */

extern struct symbol *find_pc_sect_function (CORE_ADDR, struct obj_section *);

extern int find_pc_partial_function_gnu_ifunc (CORE_ADDR pc, char **name,
					       CORE_ADDR *address,
					       CORE_ADDR *endaddr,
					       int *is_gnu_ifunc_p);

/* lookup function from address, return name, start addr and end addr.  */

extern int find_pc_partial_function (CORE_ADDR, char **, CORE_ADDR *,
				     CORE_ADDR *);

extern void clear_pc_function_cache (void);

/* lookup partial symbol table by address and section.  */

extern struct symtab *find_pc_sect_symtab_via_partial (CORE_ADDR,
						       struct obj_section *);

/* lookup full symbol table by address.  */

extern struct symtab *find_pc_symtab (CORE_ADDR);

/* lookup full symbol table by address and section.  */

extern struct symtab *find_pc_sect_symtab (CORE_ADDR, struct obj_section *);

extern int find_pc_line_pc_range (CORE_ADDR, CORE_ADDR *, CORE_ADDR *);

extern void reread_symbols (void);

extern struct type *lookup_transparent_type (const char *);
extern struct type *basic_lookup_transparent_type (const char *);


/* Macro for name of symbol to indicate a file compiled with gcc.  */
#ifndef GCC_COMPILED_FLAG_SYMBOL
#define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled."
#endif

/* Macro for name of symbol to indicate a file compiled with gcc2.  */
#ifndef GCC2_COMPILED_FLAG_SYMBOL
#define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled."
#endif

/* Functions for dealing with the minimal symbol table, really a misc
   address<->symbol mapping for things we don't have debug symbols for.  */

extern void prim_record_minimal_symbol (const char *, CORE_ADDR,
					enum minimal_symbol_type,
					struct objfile *);

extern struct minimal_symbol *prim_record_minimal_symbol_full
  (const char *, int, int, CORE_ADDR,
   enum minimal_symbol_type,
   int section, asection * bfd_section, struct objfile *);

extern struct minimal_symbol *prim_record_minimal_symbol_and_info
  (const char *, CORE_ADDR,
   enum minimal_symbol_type,
   int section, asection * bfd_section, struct objfile *);

extern unsigned int msymbol_hash_iw (const char *);

extern unsigned int msymbol_hash (const char *);

/* Compute the next hash value from previous HASH and the character C.  This
   is only a GDB in-memory computed value with no external files compatibility
   requirements.  */

#define SYMBOL_HASH_NEXT(hash, c) \
  ((hash) * 67 + tolower ((unsigned char) (c)) - 113)

extern struct objfile * msymbol_objfile (struct minimal_symbol *sym);

extern void
add_minsym_to_hash_table (struct minimal_symbol *sym,
			  struct minimal_symbol **table);

extern struct minimal_symbol *lookup_minimal_symbol (const char *,
						     const char *,
						     struct objfile *);

extern struct minimal_symbol *lookup_minimal_symbol_text (const char *,
							  struct objfile *);

struct minimal_symbol *lookup_minimal_symbol_solib_trampoline (const char *,
							       struct objfile
							       *);

extern struct minimal_symbol *lookup_minimal_symbol_by_pc_name
				(CORE_ADDR, const char *, struct objfile *);

extern struct minimal_symbol *lookup_minimal_symbol_by_pc (CORE_ADDR);

extern int in_gnu_ifunc_stub (CORE_ADDR pc);

/* Functions for resolving STT_GNU_IFUNC symbols which are implemented only
   for ELF symbol files.  */

struct gnu_ifunc_fns
{
  /* See elf_gnu_ifunc_resolve_addr for its real implementation.  */
  CORE_ADDR (*gnu_ifunc_resolve_addr) (struct gdbarch *gdbarch, CORE_ADDR pc);

  /* See elf_gnu_ifunc_resolve_name for its real implementation.  */
  int (*gnu_ifunc_resolve_name) (const char *function_name,
				 CORE_ADDR *function_address_p);

  /* See elf_gnu_ifunc_resolver_stop for its real implementation.  */
  void (*gnu_ifunc_resolver_stop) (struct breakpoint *b);

  /* See elf_gnu_ifunc_resolver_return_stop for its real implementation.  */
  void (*gnu_ifunc_resolver_return_stop) (struct breakpoint *b);
};

#define gnu_ifunc_resolve_addr gnu_ifunc_fns_p->gnu_ifunc_resolve_addr
#define gnu_ifunc_resolve_name gnu_ifunc_fns_p->gnu_ifunc_resolve_name
#define gnu_ifunc_resolver_stop gnu_ifunc_fns_p->gnu_ifunc_resolver_stop
#define gnu_ifunc_resolver_return_stop \
  gnu_ifunc_fns_p->gnu_ifunc_resolver_return_stop

extern const struct gnu_ifunc_fns *gnu_ifunc_fns_p;

extern struct minimal_symbol *
    lookup_minimal_symbol_and_objfile (const char *,
				       struct objfile **);

extern struct minimal_symbol
  *lookup_minimal_symbol_by_pc_section (CORE_ADDR, struct obj_section *);

extern struct minimal_symbol
  *lookup_solib_trampoline_symbol_by_pc (CORE_ADDR);

extern CORE_ADDR find_solib_trampoline_target (struct frame_info *, CORE_ADDR);

extern void init_minimal_symbol_collection (void);

extern struct cleanup *make_cleanup_discard_minimal_symbols (void);

extern void install_minimal_symbols (struct objfile *);

/* Sort all the minimal symbols in OBJFILE.  */

extern void msymbols_sort (struct objfile *objfile);

struct symtab_and_line
{
  /* The program space of this sal.  */
  struct program_space *pspace;

  struct symtab *symtab;
  struct obj_section *section;
  /* Line number.  Line numbers start at 1 and proceed through symtab->nlines.
     0 is never a valid line number; it is used to indicate that line number
     information is not available.  */
  int line;

  CORE_ADDR pc;
  CORE_ADDR end;
  int explicit_pc;
  int explicit_line;
};

extern void init_sal (struct symtab_and_line *sal);

struct symtabs_and_lines
{
  struct symtab_and_line *sals;
  int nelts;
};



/* Some types and macros needed for exception catchpoints.
   Can't put these in target.h because symtab_and_line isn't
   known there.  This file will be included by breakpoint.c,
   hppa-tdep.c, etc.  */

/* Enums for exception-handling support.  */
enum exception_event_kind
{
  EX_EVENT_THROW,
  EX_EVENT_CATCH
};



/* Given a pc value, return line number it is in.  Second arg nonzero means
   if pc is on the boundary use the previous statement's line number.  */

extern struct symtab_and_line find_pc_line (CORE_ADDR, int);

/* Same function, but specify a section as well as an address.  */

extern struct symtab_and_line find_pc_sect_line (CORE_ADDR,
						 struct obj_section *, int);

/* Given a symtab and line number, return the pc there.  */

extern int find_line_pc (struct symtab *, int, CORE_ADDR *);

extern int find_line_pc_range (struct symtab_and_line, CORE_ADDR *,
			       CORE_ADDR *);

extern void resolve_sal_pc (struct symtab_and_line *);

/* Given a string, return the line specified by it.  For commands like "list"
   and "breakpoint".  */

extern struct symtabs_and_lines decode_line_spec (char *, int);

extern struct symtabs_and_lines decode_line_spec_1 (char *, int);

/* Symmisc.c */

void maintenance_print_symbols (char *, int);

void maintenance_print_psymbols (char *, int);

void maintenance_print_msymbols (char *, int);

void maintenance_print_objfiles (char *, int);

void maintenance_info_symtabs (char *, int);

void maintenance_info_psymtabs (char *, int);

void maintenance_check_symtabs (char *, int);

/* maint.c */

void maintenance_print_statistics (char *, int);

/* Symbol-reading stuff in symfile.c and solib.c.  */

extern void clear_solib (void);

/* source.c */

extern int identify_source_line (struct symtab *, int, int, CORE_ADDR);

extern void print_source_lines (struct symtab *, int, int, int);

extern void forget_cached_source_info_for_objfile (struct objfile *);
extern void forget_cached_source_info (void);

extern void select_source_symtab (struct symtab *);

extern char **default_make_symbol_completion_list_break_on
  (char *text, char *word, const char *break_on);
extern char **default_make_symbol_completion_list (char *, char *);
extern char **make_symbol_completion_list (char *, char *);
extern char **make_symbol_completion_list_fn (struct cmd_list_element *,
					      char *, char *);

extern char **make_file_symbol_completion_list (char *, char *, char *);

extern char **make_source_files_completion_list (char *, char *);

/* symtab.c */

int matching_obj_sections (struct obj_section *, struct obj_section *);

extern const char *find_main_filename (void);

extern struct symtab *find_line_symtab (struct symtab *, int, int *, int *);

extern struct symtab_and_line find_function_start_sal (struct symbol *sym,
						       int);

extern void skip_prologue_sal (struct symtab_and_line *);

/* symfile.c */

extern void clear_symtab_users (int add_flags);

extern enum language deduce_language_from_filename (const char *);

/* symtab.c */

extern int in_prologue (struct gdbarch *gdbarch,
			CORE_ADDR pc, CORE_ADDR func_start);

extern CORE_ADDR skip_prologue_using_sal (struct gdbarch *gdbarch,
					  CORE_ADDR func_addr);

extern struct symbol *fixup_symbol_section (struct symbol *,
					    struct objfile *);

/* Symbol searching */

/* When using search_symbols, a list of the following structs is returned.
   Callers must free the search list using free_search_symbols!  */
struct symbol_search
{
  /* The block in which the match was found.  Could be, for example,
     STATIC_BLOCK or GLOBAL_BLOCK.  */
  int block;

  /* Information describing what was found.

     If symtab abd symbol are NOT NULL, then information was found
     for this match.  */
  struct symtab *symtab;
  struct symbol *symbol;

  /* If msymbol is non-null, then a match was made on something for
     which only minimal_symbols exist.  */
  struct minimal_symbol *msymbol;

  /* A link to the next match, or NULL for the end.  */
  struct symbol_search *next;
};

extern void search_symbols (char *, enum search_domain, int, char **,
			    struct symbol_search **);
extern void free_search_symbols (struct symbol_search *);
extern struct cleanup *make_cleanup_free_search_symbols (struct symbol_search
							 *);

/* The name of the ``main'' function.
   FIXME: cagney/2001-03-20: Can't make main_name() const since some
   of the calling code currently assumes that the string isn't
   const.  */
extern void set_main_name (const char *name);
extern /*const */ char *main_name (void);
extern enum language language_of_main;

/* Check global symbols in objfile.  */
struct symbol *lookup_global_symbol_from_objfile (const struct objfile *,
						  const char *name,
						  const domain_enum domain);

extern struct symtabs_and_lines expand_line_sal (struct symtab_and_line sal);

/* Return 1 if the supplied producer string matches the ARM RealView
   compiler (armcc).  */
int producer_is_realview (const char *producer);

void fixup_section (struct general_symbol_info *ginfo,
		    CORE_ADDR addr, struct objfile *objfile);

struct objfile *lookup_objfile_from_block (const struct block *block);

#endif /* !defined(SYMTAB_H) */