summaryrefslogtreecommitdiff
path: root/gdb/os9kread.c
blob: daa45971d0b014d551f42bffd5245322709bd4bb (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
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
/* Read os9/os9k symbol tables and convert to internal format, for GDB.
   Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 96, 1998
   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 2 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, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

/* This module provides three functions: os9k_symfile_init,
   which initializes to read a symbol file; os9k_new_init, which 
   discards existing cached information when all symbols are being
   discarded; and os9k_symfile_read, which reads a symbol table
   from a file.

   os9k_symfile_read only does the minimum work necessary for letting the
   user "name" things symbolically; it does not read the entire symtab.
   Instead, it reads the external and static symbols and puts them in partial
   symbol tables.  When more extensive information is requested of a
   file, the corresponding partial symbol table is mutated into a full
   fledged symbol table by going back and reading the symbols
   for real.  os9k_psymtab_to_symtab() is the function that does this */

#include "defs.h"
#include "gdb_string.h"
#include <stdio.h>

#if defined(USG) || defined(__CYGNUSCLIB__)
#include <sys/types.h>
#include <fcntl.h>
#endif

#include "obstack.h"
#include "gdb_stat.h"
#include <ctype.h>
#include "symtab.h"
#include "breakpoint.h"
#include "command.h"
#include "target.h"
#include "gdbcore.h"		/* for bfd stuff */
#include "libaout.h"		/* FIXME Secret internal BFD stuff for a.out */
#include "symfile.h"
#include "objfiles.h"
#include "buildsym.h"
#include "gdb-stabs.h"
#include "demangle.h"
#include "language.h"		/* Needed inside partial-stab.h */
#include "complaints.h"
#include "os9k.h"
#include "stabsread.h"

extern void _initialize_os9kread PARAMS ((void));

/* Each partial symbol table entry contains a pointer to private data for the
   read_symtab() function to use when expanding a partial symbol table entry
   to a full symbol table entry.

   For dbxread this structure contains the offset within the file symbol table
   of first local symbol for this file, and count of the section
   of the symbol table devoted to this file's symbols (actually, the section
   bracketed may contain more than just this file's symbols).  It also contains
   further information needed to locate the symbols if they are in an ELF file.

   If ldsymcnt is 0, the only reason for this thing's existence is the
   dependency list.  Nothing else will happen when it is read in.  */

#define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
#define LDSYMCNT(p) (((struct symloc *)((p)->read_symtab_private))->ldsymnum)

struct symloc
  {
    int ldsymoff;
    int ldsymnum;
  };

/* Remember what we deduced to be the source language of this psymtab. */
static enum language psymtab_language = language_unknown;

/* keep partial symbol table file nested depth */
static int psymfile_depth = 0;

/* keep symbol table file nested depth */
static int symfile_depth = 0;

/* Nonzero means give verbose info on gdb action.  From main.c.  */
extern int info_verbose;

extern int previous_stab_code;

/* Name of last function encountered.  Used in Solaris to approximate
   object file boundaries.  */
static char *last_function_name;

/* Complaints about the symbols we have encountered.  */
extern struct complaint lbrac_complaint;

extern struct complaint unknown_symtype_complaint;

extern struct complaint unknown_symchar_complaint;

extern struct complaint lbrac_rbrac_complaint;

extern struct complaint repeated_header_complaint;

extern struct complaint repeated_header_name_complaint;

#if 0
static struct complaint lbrac_unmatched_complaint =
{"unmatched Increment Block Entry before symtab pos %d", 0, 0};

static struct complaint lbrac_mismatch_complaint =
{"IBE/IDE symbol mismatch at symtab pos %d", 0, 0};
#endif

/* Local function prototypes */

static void
read_minimal_symbols PARAMS ((struct objfile *));

static void
os9k_read_ofile_symtab PARAMS ((struct partial_symtab *));

static void
os9k_psymtab_to_symtab PARAMS ((struct partial_symtab *));

static void
os9k_psymtab_to_symtab_1 PARAMS ((struct partial_symtab *));

static void
read_os9k_psymtab PARAMS ((struct objfile *, CORE_ADDR, int));

static int
fill_sym PARAMS ((FILE *, bfd *));

static void
os9k_symfile_init PARAMS ((struct objfile *));

static void
os9k_new_init PARAMS ((struct objfile *));

static void
os9k_symfile_read PARAMS ((struct objfile *, int));

static void
os9k_symfile_finish PARAMS ((struct objfile *));

static void
os9k_process_one_symbol PARAMS ((int, int, CORE_ADDR, char *,
			       struct section_offsets *, struct objfile *));

static struct partial_symtab *
  os9k_start_psymtab PARAMS ((struct objfile *, char *,
			      CORE_ADDR, int, int, struct partial_symbol **,
			      struct partial_symbol **));

static struct partial_symtab *
  os9k_end_psymtab PARAMS ((struct partial_symtab *, char **, int, int, CORE_ADDR,
			    struct partial_symtab **, int));

static void
record_minimal_symbol PARAMS ((char *, CORE_ADDR, int, struct objfile *));

#define HANDLE_RBRAC(val) \
  if ((val) > pst->texthigh) pst->texthigh = (val);

#define SWAP_STBHDR(hdrp, abfd) \
  { \
    (hdrp)->fmtno = bfd_get_16(abfd, (unsigned char *)&(hdrp)->fmtno); \
    (hdrp)->crc = bfd_get_32(abfd, (unsigned char *)&(hdrp)->crc); \
    (hdrp)->offset = bfd_get_32(abfd, (unsigned char *)&(hdrp)->offset); \
    (hdrp)->nsym = bfd_get_32(abfd, (unsigned char *)&(hdrp)->nsym); \
  }
#define SWAP_STBSYM(symp, abfd) \
  { \
    (symp)->value = bfd_get_32(abfd, (unsigned char *)&(symp)->value); \
    (symp)->type = bfd_get_16(abfd, (unsigned char *)&(symp)->type); \
    (symp)->stroff = bfd_get_32(abfd, (unsigned char *)&(symp)->stroff); \
  }
#define N_DATA 0
#define N_BSS 1
#define N_RDATA 2
#define N_IDATA 3
#define N_TEXT 4
#define N_ABS 6

static void
record_minimal_symbol (name, address, type, objfile)
     char *name;
     CORE_ADDR address;
     int type;
     struct objfile *objfile;
{
  enum minimal_symbol_type ms_type;

  switch (type)
    {
    case N_TEXT:
      ms_type = mst_text;
      address += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
      break;
    case N_DATA:
      ms_type = mst_data;
      break;
    case N_BSS:
      ms_type = mst_bss;
      break;
    case N_RDATA:
      ms_type = mst_bss;
      break;
    case N_IDATA:
      ms_type = mst_data;
      break;
    case N_ABS:
      ms_type = mst_abs;
      break;
    default:
      ms_type = mst_unknown;
      break;
    }

  prim_record_minimal_symbol (name, address, ms_type, objfile);
}

/* read and process .stb file and store in minimal symbol table */
typedef char mhhdr[80];
struct stbhdr
  {
    mhhdr comhdr;
    char *name;
    short fmtno;
    int crc;
    int offset;
    int nsym;
    char *pad;
  };
struct stbsymbol
  {
    int value;
    short type;
    int stroff;
  };
#define STBSYMSIZE 10

static void
read_minimal_symbols (objfile)
     struct objfile *objfile;
{
  FILE *fp;
  bfd *abfd;
  struct stbhdr hdr;
  struct stbsymbol sym;
  int ch, i, j, off;
  char buf[64], buf1[128];

  fp = objfile->auxf1;
  if (fp == NULL)
    return;
  abfd = objfile->obfd;
  fread (&hdr.comhdr[0], sizeof (mhhdr), 1, fp);
  i = 0;
  ch = getc (fp);
  while (ch != -1)
    {
      buf[i] = (char) ch;
      i++;
      if (ch == 0)
	break;
      ch = getc (fp);
    };
  if (i % 2)
    ch = getc (fp);
  hdr.name = &buf[0];

  fread (&hdr.fmtno, sizeof (hdr.fmtno), 1, fp);
  fread (&hdr.crc, sizeof (hdr.crc), 1, fp);
  fread (&hdr.offset, sizeof (hdr.offset), 1, fp);
  fread (&hdr.nsym, sizeof (hdr.nsym), 1, fp);
  SWAP_STBHDR (&hdr, abfd);

  /* read symbols */
  init_minimal_symbol_collection ();
  off = hdr.offset;
  for (i = hdr.nsym; i > 0; i--)
    {
      fseek (fp, (long) off, 0);
      fread (&sym.value, sizeof (sym.value), 1, fp);
      fread (&sym.type, sizeof (sym.type), 1, fp);
      fread (&sym.stroff, sizeof (sym.stroff), 1, fp);
      SWAP_STBSYM (&sym, abfd);
      fseek (fp, (long) sym.stroff, 0);
      j = 0;
      ch = getc (fp);
      while (ch != -1)
	{
	  buf1[j] = (char) ch;
	  j++;
	  if (ch == 0)
	    break;
	  ch = getc (fp);
	};
      record_minimal_symbol (buf1, sym.value, sym.type & 7, objfile);
      off += STBSYMSIZE;
    };
  install_minimal_symbols (objfile);
  return;
}

/* Scan and build partial symbols for a symbol file.
   We have been initialized by a call to os9k_symfile_init, which 
   put all the relevant info into a "struct os9k_symfile_info",
   hung off the objfile structure.

   MAINLINE is true if we are reading the main symbol
   table (as opposed to a shared lib or dynamically loaded file).  */

static void
os9k_symfile_read (objfile, mainline)
     struct objfile *objfile;
     int mainline;		/* FIXME comments above */
{
  bfd *sym_bfd;
  struct cleanup *back_to;

  sym_bfd = objfile->obfd;
  /* If we are reinitializing, or if we have never loaded syms yet, init */
  if (mainline || objfile->global_psymbols.size == 0 ||
      objfile->static_psymbols.size == 0)
    init_psymbol_list (objfile, DBX_SYMCOUNT (objfile));

  free_pending_blocks ();
  back_to = make_cleanup (really_free_pendings, 0);

  make_cleanup_discard_minimal_symbols ();
  read_minimal_symbols (objfile);

  /* Now that the symbol table data of the executable file are all in core,
     process them and define symbols accordingly.  */
  read_os9k_psymtab (objfile,
		     DBX_TEXT_ADDR (objfile),
		     DBX_TEXT_SIZE (objfile));

  do_cleanups (back_to);
}

/* Initialize anything that needs initializing when a completely new
   symbol file is specified (not just adding some symbols from another
   file, e.g. a shared library).  */

static void
os9k_new_init (ignore)
     struct objfile *ignore;
{
  stabsread_new_init ();
  buildsym_new_init ();
  psymfile_depth = 0;
/*
   init_header_files ();
 */
}

/* os9k_symfile_init ()
   It is passed a struct objfile which contains, among other things,
   the BFD for the file whose symbols are being read, and a slot for a pointer
   to "private data" which we fill with goodies.

   Since BFD doesn't know how to read debug symbols in a format-independent
   way (and may never do so...), we have to do it ourselves.  We will never
   be called unless this is an a.out (or very similar) file. 
   FIXME, there should be a cleaner peephole into the BFD environment here.  */

static void
os9k_symfile_init (objfile)
     struct objfile *objfile;
{
  bfd *sym_bfd = objfile->obfd;
  char *name = bfd_get_filename (sym_bfd);
  char dbgname[512], stbname[512];
  FILE *symfile = 0;
  FILE *minfile = 0;
  asection *text_sect;

  strcpy (dbgname, name);
  strcat (dbgname, ".dbg");
  strcpy (stbname, name);
  strcat (stbname, ".stb");

  if ((symfile = fopen (dbgname, "r")) == NULL)
    {
      warning ("Symbol file %s not found", dbgname);
    }
  objfile->auxf2 = symfile;

  if ((minfile = fopen (stbname, "r")) == NULL)
    {
      warning ("Symbol file %s not found", stbname);
    }
  objfile->auxf1 = minfile;

  /* Allocate struct to keep track of the symfile */
  objfile->sym_stab_info = (struct dbx_symfile_info *)
    xmmalloc (objfile->md, sizeof (struct dbx_symfile_info));
  DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;

  text_sect = bfd_get_section_by_name (sym_bfd, ".text");
  if (!text_sect)
    error ("Can't find .text section in file");
  DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
  DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);

  DBX_SYMBOL_SIZE (objfile) = 0;	/* variable size symbol */
  DBX_SYMCOUNT (objfile) = 0;	/* used to be bfd_get_symcount(sym_bfd) */
  DBX_SYMTAB_OFFSET (objfile) = 0;	/* used to be SYMBOL_TABLE_OFFSET */
}

/* Perform any local cleanups required when we are done with a particular
   objfile.  I.E, we are in the process of discarding all symbol information
   for an objfile, freeing up all memory held for it, and unlinking the
   objfile struct from the global list of known objfiles. */

static void
os9k_symfile_finish (objfile)
     struct objfile *objfile;
{
  if (objfile->sym_stab_info != NULL)
    {
      mfree (objfile->md, objfile->sym_stab_info);
    }
/*
   free_header_files ();
 */
}


struct st_dbghdr
{
  int sync;
  short rev;
  int crc;
  short os;
  short cpu;
};
#define SYNC 		(int)0xefbefeca

#define SWAP_DBGHDR(hdrp, abfd) \
  { \
    (hdrp)->sync = bfd_get_32(abfd, (unsigned char *)&(hdrp)->sync); \
    (hdrp)->rev = bfd_get_16(abfd, (unsigned char *)&(hdrp)->rev); \
    (hdrp)->crc = bfd_get_32(abfd, (unsigned char *)&(hdrp)->crc); \
    (hdrp)->os = bfd_get_16(abfd, (unsigned char *)&(hdrp)->os); \
    (hdrp)->cpu = bfd_get_16(abfd, (unsigned char *)&(hdrp)->cpu); \
  }

#define N_SYM_CMPLR     0
#define N_SYM_SLINE     1
#define N_SYM_SYM       2
#define N_SYM_LBRAC     3
#define N_SYM_RBRAC     4
#define N_SYM_SE        5

struct internal_symstruct
  {
    short n_type;
    short n_desc;
    long n_value;
    char *n_strx;
  };
static struct internal_symstruct symbol;
static struct internal_symstruct *symbuf = &symbol;
static char strbuf[4096];
static struct st_dbghdr dbghdr;
static short cmplrid;

#define VER_PRE_ULTRAC	((short)4)
#define VER_ULTRAC	((short)5)

static int
fill_sym (dbg_file, abfd)
     FILE *dbg_file;
     bfd *abfd;
{
  short si, nmask;
  long li;
  int ii;
  char *p;

  int nbytes = fread (&si, sizeof (si), 1, dbg_file);
  if (nbytes == 0)
    return 0;
  if (nbytes < 0)
    perror_with_name ("reading .dbg file.");
  symbuf->n_desc = 0;
  symbuf->n_value = 0;
  symbuf->n_strx = NULL;
  symbuf->n_type = bfd_get_16 (abfd, (unsigned char *) &si);
  symbuf->n_type = 0xf & symbuf->n_type;
  switch (symbuf->n_type)
    {
    case N_SYM_CMPLR:
      fread (&si, sizeof (si), 1, dbg_file);
      symbuf->n_desc = bfd_get_16 (abfd, (unsigned char *) &si);
      cmplrid = symbuf->n_desc & 0xff;
      break;
    case N_SYM_SLINE:
      fread (&li, sizeof (li), 1, dbg_file);
      symbuf->n_value = bfd_get_32 (abfd, (unsigned char *) &li);
      fread (&li, sizeof (li), 1, dbg_file);
      li = bfd_get_32 (abfd, (unsigned char *) &li);
      symbuf->n_strx = (char *) (li >> 12);
      symbuf->n_desc = li & 0xfff;
      break;
    case N_SYM_SYM:
      fread (&li, sizeof (li), 1, dbg_file);
      symbuf->n_value = bfd_get_32 (abfd, (unsigned char *) &li);
      si = 0;
      do
	{
	  ii = getc (dbg_file);
	  strbuf[si++] = (char) ii;
	}
      while (ii != 0 || si % 2 != 0);
      symbuf->n_strx = strbuf;
      p = (char *) strchr (strbuf, ':');
      if (!p)
	break;
      if ((p[1] == 'F' || p[1] == 'f') && cmplrid == VER_PRE_ULTRAC)
	{
	  fread (&si, sizeof (si), 1, dbg_file);
	  nmask = bfd_get_16 (abfd, (unsigned char *) &si);
	  for (ii = 0; ii < nmask; ii++)
	    fread (&si, sizeof (si), 1, dbg_file);
	}
      break;
    case N_SYM_LBRAC:
      fread (&li, sizeof (li), 1, dbg_file);
      symbuf->n_value = bfd_get_32 (abfd, (unsigned char *) &li);
      break;
    case N_SYM_RBRAC:
      fread (&li, sizeof (li), 1, dbg_file);
      symbuf->n_value = bfd_get_32 (abfd, (unsigned char *) &li);
      break;
    case N_SYM_SE:
      break;
    }
  return 1;
}

/* Given pointers to an a.out symbol table in core containing dbx
   style data, setup partial_symtab's describing each source file for
   which debugging information is available.
   SYMFILE_NAME is the name of the file we are reading from. */

static void
read_os9k_psymtab (objfile, text_addr, text_size)
     struct objfile *objfile;
     CORE_ADDR text_addr;
     int text_size;
{
  register struct internal_symstruct *bufp = 0;		/* =0 avoids gcc -Wall glitch */
  register char *namestring;
  int past_first_source_file = 0;
  CORE_ADDR last_o_file_start = 0;
#if 0
  struct cleanup *back_to;
#endif
  bfd *abfd;
  FILE *fp;

  /* End of the text segment of the executable file.  */
  static CORE_ADDR end_of_text_addr;

  /* Current partial symtab */
  static struct partial_symtab *pst = 0;

  /* List of current psymtab's include files */
  char **psymtab_include_list;
  int includes_allocated;
  int includes_used;

  /* Index within current psymtab dependency list */
  struct partial_symtab **dependency_list;
  int dependencies_used, dependencies_allocated;

  includes_allocated = 30;
  includes_used = 0;
  psymtab_include_list = (char **) alloca (includes_allocated *
					   sizeof (char *));

  dependencies_allocated = 30;
  dependencies_used = 0;
  dependency_list =
    (struct partial_symtab **) alloca (dependencies_allocated *
				       sizeof (struct partial_symtab *));

  last_source_file = NULL;

#ifdef END_OF_TEXT_DEFAULT
  end_of_text_addr = END_OF_TEXT_DEFAULT;
#else
  end_of_text_addr = text_addr + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile))
    + text_size;		/* Relocate */
#endif

  abfd = objfile->obfd;
  fp = objfile->auxf2;
  if (!fp)
    return;

  fread (&dbghdr.sync, sizeof (dbghdr.sync), 1, fp);
  fread (&dbghdr.rev, sizeof (dbghdr.rev), 1, fp);
  fread (&dbghdr.crc, sizeof (dbghdr.crc), 1, fp);
  fread (&dbghdr.os, sizeof (dbghdr.os), 1, fp);
  fread (&dbghdr.cpu, sizeof (dbghdr.cpu), 1, fp);
  SWAP_DBGHDR (&dbghdr, abfd);

  symnum = 0;
  while (1)
    {
      int ret;
      long cursymoffset;

      /* Get the symbol for this run and pull out some info */
      QUIT;			/* allow this to be interruptable */
      cursymoffset = ftell (objfile->auxf2);
      ret = fill_sym (objfile->auxf2, abfd);
      if (ret <= 0)
	break;
      else
	symnum++;
      bufp = symbuf;

      /* Special case to speed up readin. */
      if (bufp->n_type == (short) N_SYM_SLINE)
	continue;

#define CUR_SYMBOL_VALUE bufp->n_value
      /* partial-stab.h */

      switch (bufp->n_type)
	{
	  char *p;

	case N_SYM_CMPLR:
	  continue;

	case N_SYM_SE:
	  CUR_SYMBOL_VALUE += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
	  if (psymfile_depth == 1 && pst)
	    {
	      os9k_end_psymtab (pst, psymtab_include_list, includes_used,
				symnum, CUR_SYMBOL_VALUE,
				dependency_list, dependencies_used);
	      pst = (struct partial_symtab *) 0;
	      includes_used = 0;
	      dependencies_used = 0;
	    }
	  psymfile_depth--;
	  continue;

	case N_SYM_SYM:	/* Typedef or automatic variable. */
	  namestring = bufp->n_strx;
	  p = (char *) strchr (namestring, ':');
	  if (!p)
	    continue;		/* Not a debugging symbol.   */

	  /* Main processing section for debugging symbols which
	     the initial read through the symbol tables needs to worry
	     about.  If we reach this point, the symbol which we are
	     considering is definitely one we are interested in.
	     p must also contain the (valid) index into the namestring
	     which indicates the debugging type symbol.  */

	  switch (p[1])
	    {
	    case 'S':
	      {
		unsigned long valu;
		enum language tmp_language;
		char *str, *p;
		int n;

		valu = CUR_SYMBOL_VALUE;
		if (valu)
		  valu += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
		past_first_source_file = 1;

		p = strchr (namestring, ':');
		if (p)
		  n = p - namestring;
		else
		  n = strlen (namestring);
		str = alloca (n + 1);
		strncpy (str, namestring, n);
		str[n] = '\0';

		if (psymfile_depth == 0)
		  {
		    if (!pst)
		      pst = os9k_start_psymtab (objfile,
						str, valu,
						cursymoffset,
						symnum - 1,
					      objfile->global_psymbols.next,
					     objfile->static_psymbols.next);
		  }
		else
		  {		/* this is a include file */
		    tmp_language = deduce_language_from_filename (str);
		    if (tmp_language != language_unknown
			&& (tmp_language != language_c
			    || psymtab_language != language_cplus))
		      psymtab_language = tmp_language;

/*
   if (pst && STREQ (str, pst->filename))
   continue;
   {
   register int i;
   for (i = 0; i < includes_used; i++)
   if (STREQ (str, psymtab_include_list[i]))
   {
   i = -1; 
   break;
   }
   if (i == -1)
   continue;
   }
 */

		    psymtab_include_list[includes_used++] = str;
		    if (includes_used >= includes_allocated)
		      {
			char **orig = psymtab_include_list;

			psymtab_include_list = (char **)
			  alloca ((includes_allocated *= 2) * sizeof (char *));
			memcpy ((PTR) psymtab_include_list, (PTR) orig,
				includes_used * sizeof (char *));
		      }

		  }
		psymfile_depth++;
		continue;
	      }

	    case 'v':
	      add_psymbol_to_list (namestring, p - namestring,
				   VAR_NAMESPACE, LOC_STATIC,
				   &objfile->static_psymbols,
				   0, CUR_SYMBOL_VALUE,
				   psymtab_language, objfile);
	      continue;
	    case 'V':
	      add_psymbol_to_list (namestring, p - namestring,
				   VAR_NAMESPACE, LOC_STATIC,
				   &objfile->global_psymbols,
				   0, CUR_SYMBOL_VALUE,
				   psymtab_language, objfile);
	      continue;

	    case 'T':
	      if (p != namestring)	/* a name is there, not just :T... */
		{
		  add_psymbol_to_list (namestring, p - namestring,
				       STRUCT_NAMESPACE, LOC_TYPEDEF,
				       &objfile->static_psymbols,
				       CUR_SYMBOL_VALUE, 0,
				       psymtab_language, objfile);
		  if (p[2] == 't')
		    {
		      /* Also a typedef with the same name.  */
		      add_psymbol_to_list (namestring, p - namestring,
					   VAR_NAMESPACE, LOC_TYPEDEF,
					   &objfile->static_psymbols,
				      CUR_SYMBOL_VALUE, 0, psymtab_language,
					   objfile);
		      p += 1;
		    }
		  /* The semantics of C++ state that "struct foo { ... }"
		     also defines a typedef for "foo".  Unfortuantely, cfront
		     never makes the typedef when translating from C++ to C.
		     We make the typedef here so that "ptype foo" works as
		     expected for cfront translated code.  */
		  else if (psymtab_language == language_cplus)
		    {
		      /* Also a typedef with the same name.  */
		      add_psymbol_to_list (namestring, p - namestring,
					   VAR_NAMESPACE, LOC_TYPEDEF,
					   &objfile->static_psymbols,
				      CUR_SYMBOL_VALUE, 0, psymtab_language,
					   objfile);
		    }
		}
	      goto check_enum;
	    case 't':
	      if (p != namestring)	/* a name is there, not just :T... */
		{
		  add_psymbol_to_list (namestring, p - namestring,
				       VAR_NAMESPACE, LOC_TYPEDEF,
				       &objfile->static_psymbols,
				       CUR_SYMBOL_VALUE, 0,
				       psymtab_language, objfile);
		}
	    check_enum:
	      /* If this is an enumerated type, we need to
	         add all the enum constants to the partial symbol
	         table.  This does not cover enums without names, e.g.
	         "enum {a, b} c;" in C, but fortunately those are
	         rare.  There is no way for GDB to find those from the
	         enum type without spending too much time on it.  Thus
	         to solve this problem, the compiler needs to put out the
	         enum in a nameless type.  GCC2 does this.  */

	      /* We are looking for something of the form
	         <name> ":" ("t" | "T") [<number> "="] "e" <size>
	         {<constant> ":" <value> ","} ";".  */

	      /* Skip over the colon and the 't' or 'T'.  */
	      p += 2;
	      /* This type may be given a number.  Also, numbers can come
	         in pairs like (0,26).  Skip over it.  */
	      while ((*p >= '0' && *p <= '9')
		     || *p == '(' || *p == ',' || *p == ')'
		     || *p == '=')
		p++;

	      if (*p++ == 'e')
		{
		  /* We have found an enumerated type. skip size */
		  while (*p >= '0' && *p <= '9')
		    p++;
		  /* According to comments in read_enum_type
		     a comma could end it instead of a semicolon.
		     I don't know where that happens.
		     Accept either.  */
		  while (*p && *p != ';' && *p != ',')
		    {
		      char *q;

		      /* Check for and handle cretinous dbx symbol name
		         continuation! 
		         if (*p == '\\')
		         p = next_symbol_text (objfile);
		       */

		      /* Point to the character after the name
		         of the enum constant.  */
		      for (q = p; *q && *q != ':'; q++)
			;
		      /* Note that the value doesn't matter for
		         enum constants in psymtabs, just in symtabs.  */
		      add_psymbol_to_list (p, q - p,
					   VAR_NAMESPACE, LOC_CONST,
					   &objfile->static_psymbols, 0,
					   0, psymtab_language, objfile);
		      /* Point past the name.  */
		      p = q;
		      /* Skip over the value.  */
		      while (*p && *p != ',')
			p++;
		      /* Advance past the comma.  */
		      if (*p)
			p++;
		    }
		}
	      continue;
	    case 'c':
	      /* Constant, e.g. from "const" in Pascal.  */
	      add_psymbol_to_list (namestring, p - namestring,
				   VAR_NAMESPACE, LOC_CONST,
				&objfile->static_psymbols, CUR_SYMBOL_VALUE,
				   0, psymtab_language, objfile);
	      continue;

	    case 'f':
	      CUR_SYMBOL_VALUE += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
	      if (pst && pst->textlow == 0)
		pst->textlow = CUR_SYMBOL_VALUE;

	      add_psymbol_to_list (namestring, p - namestring,
				   VAR_NAMESPACE, LOC_BLOCK,
				&objfile->static_psymbols, CUR_SYMBOL_VALUE,
				   0, psymtab_language, objfile);
	      continue;

	    case 'F':
	      CUR_SYMBOL_VALUE += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
	      if (pst && pst->textlow == 0)
		pst->textlow = CUR_SYMBOL_VALUE;

	      add_psymbol_to_list (namestring, p - namestring,
				   VAR_NAMESPACE, LOC_BLOCK,
				&objfile->global_psymbols, CUR_SYMBOL_VALUE,
				   0, psymtab_language, objfile);
	      continue;

	    case 'p':
	    case 'l':
	    case 's':
	      continue;

	    case ':':
	      /* It is a C++ nested symbol.  We don't need to record it
	         (I don't think); if we try to look up foo::bar::baz,
	         then symbols for the symtab containing foo should get
	         read in, I think.  */
	      /* Someone says sun cc puts out symbols like
	         /foo/baz/maclib::/usr/local/bin/maclib,
	         which would get here with a symbol type of ':'.  */
	      continue;

	    default:
	      /* Unexpected symbol descriptor.  The second and subsequent stabs
	         of a continued stab can show up here.  The question is
	         whether they ever can mimic a normal stab--it would be
	         nice if not, since we certainly don't want to spend the
	         time searching to the end of every string looking for
	         a backslash.  */

	      complain (&unknown_symchar_complaint, p[1]);
	      continue;
	    }

	case N_SYM_RBRAC:
	  CUR_SYMBOL_VALUE += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
#ifdef HANDLE_RBRAC
	  HANDLE_RBRAC (CUR_SYMBOL_VALUE);
	  continue;
#endif
	case N_SYM_LBRAC:
	  continue;

	default:
	  /* If we haven't found it yet, ignore it.  It's probably some
	     new type we don't know about yet.  */
	  complain (&unknown_symtype_complaint,
		    local_hex_string ((unsigned long) bufp->n_type));
	  continue;
	}
    }

  DBX_SYMCOUNT (objfile) = symnum;

  /* If there's stuff to be cleaned up, clean it up.  */
  if (DBX_SYMCOUNT (objfile) > 0
/*FIXME, does this have a bug at start address 0? */
      && last_o_file_start
      && objfile->ei.entry_point < bufp->n_value
      && objfile->ei.entry_point >= last_o_file_start)
    {
      objfile->ei.entry_file_lowpc = last_o_file_start;
      objfile->ei.entry_file_highpc = bufp->n_value;
    }

  if (pst)
    {
      os9k_end_psymtab (pst, psymtab_include_list, includes_used,
			symnum, end_of_text_addr,
			dependency_list, dependencies_used);
    }
/*
   do_cleanups (back_to);
 */
}

/* Allocate and partially fill a partial symtab.  It will be
   completely filled at the end of the symbol list.

   SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
   is the address relative to which its symbols are (incremental) or 0
   (normal). */


static struct partial_symtab *
os9k_start_psymtab (objfile,
	    filename, textlow, ldsymoff, ldsymcnt, global_syms, static_syms)
     struct objfile *objfile;
     char *filename;
     CORE_ADDR textlow;
     int ldsymoff;
     int ldsymcnt;
     struct partial_symbol **global_syms;
     struct partial_symbol **static_syms;
{
  struct partial_symtab *result =
  start_psymtab_common (objfile, objfile->section_offsets,
			filename, textlow, global_syms, static_syms);

  result->read_symtab_private = (char *)
    obstack_alloc (&objfile->psymbol_obstack, sizeof (struct symloc));

  LDSYMOFF (result) = ldsymoff;
  LDSYMCNT (result) = ldsymcnt;
  result->read_symtab = os9k_psymtab_to_symtab;

  /* Deduce the source language from the filename for this psymtab. */
  psymtab_language = deduce_language_from_filename (filename);
  return result;
}

/* Close off the current usage of PST.  
   Returns PST or NULL if the partial symtab was empty and thrown away.
   FIXME:  List variables and peculiarities of same.  */

static struct partial_symtab *
os9k_end_psymtab (pst, include_list, num_includes, capping_symbol_cnt,
		  capping_text, dependency_list, number_dependencies)
     struct partial_symtab *pst;
     char **include_list;
     int num_includes;
     int capping_symbol_cnt;
     CORE_ADDR capping_text;
     struct partial_symtab **dependency_list;
     int number_dependencies;
     /* struct partial_symbol *capping_global, *capping_static; */
{
  int i;
  struct partial_symtab *p1;
  struct objfile *objfile = pst->objfile;

  if (capping_symbol_cnt != -1)
    LDSYMCNT (pst) = capping_symbol_cnt - LDSYMCNT (pst);

  /* Under Solaris, the N_SO symbols always have a value of 0,
     instead of the usual address of the .o file.  Therefore,
     we have to do some tricks to fill in texthigh and textlow.
     The first trick is in partial-stab.h: if we see a static
     or global function, and the textlow for the current pst
     is still 0, then we use that function's address for 
     the textlow of the pst.

     Now, to fill in texthigh, we remember the last function seen
     in the .o file (also in partial-stab.h).  Also, there's a hack in
     bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
     to here via the misc_info field.  Therefore, we can fill in
     a reliable texthigh by taking the address plus size of the
     last function in the file.

     Unfortunately, that does not cover the case where the last function
     in the file is static.  See the paragraph below for more comments
     on this situation.

     Finally, if we have a valid textlow for the current file, we run
     down the partial_symtab_list filling in previous texthighs that
     are still unknown.  */

  if (pst->texthigh == 0 && last_function_name)
    {
      char *p;
      int n;
      struct minimal_symbol *minsym;

      p = strchr (last_function_name, ':');
      if (p == NULL)
	p = last_function_name;
      n = p - last_function_name;
      p = alloca (n + 1);
      strncpy (p, last_function_name, n);
      p[n] = 0;

      minsym = lookup_minimal_symbol (p, NULL, objfile);

      if (minsym)
	{
	  pst->texthigh = SYMBOL_VALUE_ADDRESS (minsym) + (long) MSYMBOL_INFO (minsym);
	}
      else
	{
	  /* This file ends with a static function, and it's
	     difficult to imagine how hard it would be to track down
	     the elf symbol.  Luckily, most of the time no one will notice,
	     since the next file will likely be compiled with -g, so
	     the code below will copy the first fuction's start address 
	     back to our texthigh variable.  (Also, if this file is the
	     last one in a dynamically linked program, texthigh already
	     has the right value.)  If the next file isn't compiled
	     with -g, then the last function in this file winds up owning
	     all of the text space up to the next -g file, or the end (minus
	     shared libraries).  This only matters for single stepping,
	     and even then it will still work, except that it will single
	     step through all of the covered functions, instead of setting
	     breakpoints around them as it usualy does.  This makes it
	     pretty slow, but at least it doesn't fail.

	     We can fix this with a fairly big change to bfd, but we need
	     to coordinate better with Cygnus if we want to do that.  FIXME.  */
	}
      last_function_name = NULL;
    }

  /* this test will be true if the last .o file is only data */
  if (pst->textlow == 0)
    pst->textlow = pst->texthigh;

  /* If we know our own starting text address, then walk through all other
     psymtabs for this objfile, and if any didn't know their ending text
     address, set it to our starting address.  Take care to not set our
     own ending address to our starting address, nor to set addresses on
     `dependency' files that have both textlow and texthigh zero.  */
  if (pst->textlow)
    {
      ALL_OBJFILE_PSYMTABS (objfile, p1)
      {
	if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst)
	  {
	    p1->texthigh = pst->textlow;
	    /* if this file has only data, then make textlow match texthigh */
	    if (p1->textlow == 0)
	      p1->textlow = p1->texthigh;
	  }
      }
    }

  /* End of kludge for patching Solaris textlow and texthigh.  */

  pst->n_global_syms =
    objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset);
  pst->n_static_syms =
    objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset);

  pst->number_of_dependencies = number_dependencies;
  if (number_dependencies)
    {
      pst->dependencies = (struct partial_symtab **)
	obstack_alloc (&objfile->psymbol_obstack,
		    number_dependencies * sizeof (struct partial_symtab *));
      memcpy (pst->dependencies, dependency_list,
	      number_dependencies * sizeof (struct partial_symtab *));
    }
  else
    pst->dependencies = 0;

  for (i = 0; i < num_includes; i++)
    {
      struct partial_symtab *subpst =
      allocate_psymtab (include_list[i], objfile);

      subpst->section_offsets = pst->section_offsets;
      subpst->read_symtab_private =
	(char *) obstack_alloc (&objfile->psymbol_obstack,
				sizeof (struct symloc));
      LDSYMOFF (subpst) =
	LDSYMCNT (subpst) =
	subpst->textlow =
	subpst->texthigh = 0;

      /* We could save slight bits of space by only making one of these,
         shared by the entire set of include files.  FIXME-someday.  */
      subpst->dependencies = (struct partial_symtab **)
	obstack_alloc (&objfile->psymbol_obstack,
		       sizeof (struct partial_symtab *));
      subpst->dependencies[0] = pst;
      subpst->number_of_dependencies = 1;

      subpst->globals_offset =
	subpst->n_global_syms =
	subpst->statics_offset =
	subpst->n_static_syms = 0;

      subpst->readin = 0;
      subpst->symtab = 0;
      subpst->read_symtab = pst->read_symtab;
    }

  sort_pst_symbols (pst);

  /* If there is already a psymtab or symtab for a file of this name, 
     remove it.
     (If there is a symtab, more drastic things also happen.)
     This happens in VxWorks.  */
  free_named_symtabs (pst->filename);

  if (num_includes == 0
      && number_dependencies == 0
      && pst->n_global_syms == 0
      && pst->n_static_syms == 0)
    {
      /* Throw away this psymtab, it's empty.  We can't deallocate it, since
         it is on the obstack, but we can forget to chain it on the list.  */
      /* Indicate that psymtab was thrown away.  */

      discard_psymtab (pst);

      pst = (struct partial_symtab *) NULL;
    }
  return pst;
}

static void
os9k_psymtab_to_symtab_1 (pst)
     struct partial_symtab *pst;
{
  struct cleanup *old_chain;
  int i;

  if (!pst)
    return;

  if (pst->readin)
    {
      fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in.  Shouldn't happen.\n",
			  pst->filename);
      return;
    }

  /* Read in all partial symtabs on which this one is dependent */
  for (i = 0; i < pst->number_of_dependencies; i++)
    if (!pst->dependencies[i]->readin)
      {
	/* Inform about additional files that need to be read in.  */
	if (info_verbose)
	  {
	    fputs_filtered (" ", gdb_stdout);
	    wrap_here ("");
	    fputs_filtered ("and ", gdb_stdout);
	    wrap_here ("");
	    printf_filtered ("%s...", pst->dependencies[i]->filename);
	    wrap_here ("");	/* Flush output */
	    gdb_flush (gdb_stdout);
	  }
	os9k_psymtab_to_symtab_1 (pst->dependencies[i]);
      }

  if (LDSYMCNT (pst))		/* Otherwise it's a dummy */
    {
      /* Init stuff necessary for reading in symbols */
      stabsread_init ();
      buildsym_init ();
      old_chain = make_cleanup (really_free_pendings, 0);

      /* Read in this file's symbols */
      os9k_read_ofile_symtab (pst);
      sort_symtab_syms (pst->symtab);
      do_cleanups (old_chain);
    }

  pst->readin = 1;
}

/* Read in all of the symbols for a given psymtab for real.
   Be verbose about it if the user wants that.  */

static void
os9k_psymtab_to_symtab (pst)
     struct partial_symtab *pst;
{
  bfd *sym_bfd;

  if (!pst)
    return;

  if (pst->readin)
    {
      fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in.  Shouldn't happen.\n",
			  pst->filename);
      return;
    }

  if (LDSYMCNT (pst) || pst->number_of_dependencies)
    {
      /* Print the message now, before reading the string table,
         to avoid disconcerting pauses.  */
      if (info_verbose)
	{
	  printf_filtered ("Reading in symbols for %s...", pst->filename);
	  gdb_flush (gdb_stdout);
	}

      sym_bfd = pst->objfile->obfd;
      os9k_psymtab_to_symtab_1 (pst);

      /* Match with global symbols.  This only needs to be done once,
         after all of the symtabs and dependencies have been read in.   */
      scan_file_globals (pst->objfile);

      /* Finish up the debug error message.  */
      if (info_verbose)
	printf_filtered ("done.\n");
    }
}

/* Read in a defined section of a specific object file's symbols. */
static void
os9k_read_ofile_symtab (pst)
     struct partial_symtab *pst;
{
  register struct internal_symstruct *bufp;
  unsigned char type;
  unsigned max_symnum;
  register bfd *abfd;
  struct objfile *objfile;
  int sym_offset;		/* Offset to start of symbols to read */
  CORE_ADDR text_offset;	/* Start of text segment for symbols */
  int text_size;		/* Size of text segment for symbols */
  FILE *dbg_file;

  objfile = pst->objfile;
  sym_offset = LDSYMOFF (pst);
  max_symnum = LDSYMCNT (pst);
  text_offset = pst->textlow;
  text_size = pst->texthigh - pst->textlow;

  current_objfile = objfile;
  subfile_stack = NULL;
  last_source_file = NULL;

  abfd = objfile->obfd;
  dbg_file = objfile->auxf2;

#if 0
  /* It is necessary to actually read one symbol *before* the start
     of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
     occurs before the N_SO symbol.
     Detecting this in read_dbx_symtab
     would slow down initial readin, so we look for it here instead. */
  if (!processing_acc_compilation && sym_offset >= (int) symbol_size)
    {
      fseek (objefile->auxf2, sym_offset, SEEK_CUR);
      fill_sym (objfile->auxf2, abfd);
      bufp = symbuf;

      processing_gcc_compilation = 0;
      if (bufp->n_type == N_TEXT)
	{
	  if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
	    processing_gcc_compilation = 1;
	  else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
	    processing_gcc_compilation = 2;
	}

      /* Try to select a C++ demangling based on the compilation unit
         producer. */

      if (processing_gcc_compilation)
	{
	  if (AUTO_DEMANGLING)
	    {
	      set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
	    }
	}
    }
  else
    {
      /* The N_SO starting this symtab is the first symbol, so we
         better not check the symbol before it.  I'm not this can
         happen, but it doesn't hurt to check for it.  */
      bfd_seek (symfile_bfd, sym_offset, SEEK_CUR);
      processing_gcc_compilation = 0;
    }
#endif /* 0 */

  fseek (dbg_file, (long) sym_offset, 0);
/*
   if (bufp->n_type != (unsigned char)N_SYM_SYM)
   error("First symbol in segment of executable not a source symbol");
 */

  for (symnum = 0; symnum < max_symnum; symnum++)
    {
      QUIT;			/* Allow this to be interruptable */
      fill_sym (dbg_file, abfd);
      bufp = symbuf;
      type = bufp->n_type;

      os9k_process_one_symbol ((int) type, (int) bufp->n_desc,
	 (CORE_ADDR) bufp->n_value, bufp->n_strx, pst->section_offsets, objfile);

      /* We skip checking for a new .o or -l file; that should never
         happen in this routine. */
#if 0
      else
      if (type == N_TEXT)
	{
	  /* I don't think this code will ever be executed, because
	     the GCC_COMPILED_FLAG_SYMBOL usually is right before
	     the N_SO symbol which starts this source file.
	     However, there is no reason not to accept
	     the GCC_COMPILED_FLAG_SYMBOL anywhere.  */

	  if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
	    processing_gcc_compilation = 1;
	  else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
	    processing_gcc_compilation = 2;

	  if (AUTO_DEMANGLING)
	    {
	      set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
	    }
	}
      else if (type & N_EXT || type == (unsigned char) N_TEXT
	       || type == (unsigned char) N_NBTEXT
	)
	{
	  /* Global symbol: see if we came across a dbx defintion for
	     a corresponding symbol.  If so, store the value.  Remove
	     syms from the chain when their values are stored, but
	     search the whole chain, as there may be several syms from
	     different files with the same name. */
	  /* This is probably not true.  Since the files will be read
	     in one at a time, each reference to a global symbol will
	     be satisfied in each file as it appears. So we skip this
	     section. */
	  ;
	}
#endif /* 0 */
    }

  current_objfile = NULL;

  /* In a Solaris elf file, this variable, which comes from the
     value of the N_SO symbol, will still be 0.  Luckily, text_offset,
     which comes from pst->textlow is correct. */
  if (last_source_start_addr == 0)
    last_source_start_addr = text_offset;
  pst->symtab = end_symtab (text_offset + text_size, objfile, SECT_OFF_TEXT (objfile));
  end_stabs ();
}


/* This handles a single symbol from the symbol-file, building symbols
   into a GDB symtab.  It takes these arguments and an implicit argument.

   TYPE is the type field of the ".stab" symbol entry.
   DESC is the desc field of the ".stab" entry.
   VALU is the value field of the ".stab" entry.
   NAME is the symbol name, in our address space.
   SECTION_OFFSETS is a set of amounts by which the sections of this object
   file were relocated when it was loaded into memory.
   All symbols that refer
   to memory locations need to be offset by these amounts.
   OBJFILE is the object file from which we are reading symbols.
   It is used in end_symtab.  */

static void
os9k_process_one_symbol (type, desc, valu, name, section_offsets, objfile)
     int type, desc;
     CORE_ADDR valu;
     char *name;
     struct section_offsets *section_offsets;
     struct objfile *objfile;
{
  register struct context_stack *new;
  /* The stab type used for the definition of the last function.
     N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers.  */
  static int function_stab_type = 0;

#if 0
  /* Something is wrong if we see real data before
     seeing a source file name.  */
  if (last_source_file == NULL && type != (unsigned char) N_SO)
    {
      /* Ignore any symbols which appear before an N_SO symbol.
         Currently no one puts symbols there, but we should deal
         gracefully with the case.  A complain()t might be in order,
         but this should not be an error ().  */
      return;
    }
#endif /* 0 */

  switch (type)
    {
    case N_SYM_LBRAC:
      /* On most machines, the block addresses are relative to the
         N_SO, the linker did not relocate them (sigh).  */
      valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
      new = push_context (desc, valu);
      break;

    case N_SYM_RBRAC:
      valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
      new = pop_context ();

#if !defined (OS9K_VARIABLES_INSIDE_BLOCK)
#define OS9K_VARIABLES_INSIDE_BLOCK(desc, gcc_p) 1
#endif

      if (!OS9K_VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation))
	local_symbols = new->locals;

      if (context_stack_depth > 1)
	{
	  /* This is not the outermost LBRAC...RBRAC pair in the function,
	     its local symbols preceded it, and are the ones just recovered
	     from the context stack.  Define the block for them (but don't
	     bother if the block contains no symbols.  Should we complain
	     on blocks without symbols?  I can't think of any useful purpose
	     for them).  */
	  if (local_symbols != NULL)
	    {
	      /* Muzzle a compiler bug that makes end < start.  (which
	         compilers?  Is this ever harmful?).  */
	      if (new->start_addr > valu)
		{
		  complain (&lbrac_rbrac_complaint);
		  new->start_addr = valu;
		}
	      /* Make a block for the local symbols within.  */
	      finish_block (0, &local_symbols, new->old_blocks,
			    new->start_addr, valu, objfile);
	    }
	}
      else
	{
	  if (context_stack_depth == 0)
	    {
	      within_function = 0;
	      /* Make a block for the local symbols within.  */
	      finish_block (new->name, &local_symbols, new->old_blocks,
			    new->start_addr, valu, objfile);
	    }
	  else
	    {
	      /* attach local_symbols to the end of new->locals */
	      if (!new->locals)
		new->locals = local_symbols;
	      else
		{
		  struct pending *p;

		  p = new->locals;
		  while (p->next)
		    p = p->next;
		  p->next = local_symbols;
		}
	    }
	}

      if (OS9K_VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation))
	/* Now pop locals of block just finished.  */
	local_symbols = new->locals;
      break;


    case N_SYM_SLINE:
      /* This type of "symbol" really just records
         one line-number -- core-address correspondence.
         Enter it in the line list for this symbol table. */
      /* Relocate for dynamic loading and for ELF acc fn-relative syms.  */
      valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
      /* FIXME: loses if sizeof (char *) > sizeof (int) */
      record_line (current_subfile, (int) name, valu);
      break;

      /* The following symbol types need to have the appropriate offset added
         to their value; then we process symbol definitions in the name.  */
    case N_SYM_SYM:

      if (name)
	{
	  char deftype;
	  char *dirn, *n;
	  char *p = strchr (name, ':');
	  if (p == NULL)
	    deftype = '\0';
	  else
	    deftype = p[1];


	  switch (deftype)
	    {
	    case 'S':
	      valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
	      n = strrchr (name, '/');
	      if (n != NULL)
		{
		  *n = '\0';
		  n++;
		  dirn = name;
		}
	      else
		{
		  n = name;
		  dirn = NULL;
		}
	      *p = '\0';
	      if (symfile_depth++ == 0)
		{
		  if (last_source_file)
		    {
		      end_symtab (valu, objfile, SECT_OFF_TEXT (objfile));
		      end_stabs ();
		    }
		  start_stabs ();
		  os9k_stabs = 1;
		  start_symtab (n, dirn, valu);
		  record_debugformat ("OS9");
		}
	      else
		{
		  push_subfile ();
		  start_subfile (n, dirn != NULL ? dirn : current_subfile->dirname);
		}
	      break;

	    case 'f':
	    case 'F':
	      valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
	      function_stab_type = type;

	      within_function = 1;
	      new = push_context (0, valu);
	      new->name = define_symbol (valu, name, desc, type, objfile);
	      break;

	    case 'V':
	    case 'v':
	      valu += ANOFFSET (section_offsets, SECT_OFF_DATA (objfile));
	      define_symbol (valu, name, desc, type, objfile);
	      break;

	    default:
	      define_symbol (valu, name, desc, type, objfile);
	      break;
	    }
	}
      break;

    case N_SYM_SE:
      if (--symfile_depth != 0)
	start_subfile (pop_subfile (), current_subfile->dirname);
      break;

    default:
      complain (&unknown_symtype_complaint,
		local_hex_string ((unsigned long) type));
      /* FALLTHROUGH */
      break;

    case N_SYM_CMPLR:
      break;
    }
  previous_stab_code = type;
}

static struct sym_fns os9k_sym_fns =
{
  bfd_target_os9k_flavour,
  os9k_new_init,		/* sym_new_init: init anything gbl to entire symtab */
  os9k_symfile_init,		/* sym_init: read initial info, setup for sym_read() */
  os9k_symfile_read,		/* sym_read: read a symbol file into symtab */
  os9k_symfile_finish,		/* sym_finish: finished with file, cleanup */
  default_symfile_offsets,	/* sym_offsets: parse user's offsets to internal form */
  NULL				/* next: pointer to next struct sym_fns */
};

void
_initialize_os9kread ()
{
  add_symtab_fns (&os9k_sym_fns);
}