aboutsummaryrefslogtreecommitdiff
path: root/gdb/dbxread.c
blob: ca688d890c382a2f7c082f9fd17f2c4f0650260c (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
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
/* Read dbx symbol tables and convert to internal format, for GDB.
   Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
   1996, 1997, 1998, 1999, 2000, 2001
   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: dbx_symfile_init,
   which initializes to read a symbol file; dbx_new_init, which 
   discards existing cached information when all symbols are being
   discarded; and dbx_symfile_read, which reads a symbol table
   from a file.

   dbx_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.  dbx_psymtab_to_symtab() is the function that does this */

#include "defs.h"
#include "gdb_string.h"

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

#include "obstack.h"
#include "gdb_stat.h"
#include "symtab.h"
#include "breakpoint.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 "stabsread.h"
#include "gdb-stabs.h"
#include "demangle.h"
#include "language.h"		/* Needed inside partial-stab.h */
#include "complaints.h"
#include "cp-abi.h"

#include "aout/aout64.h"
#include "aout/stab_gnu.h"	/* We always use GNU stabs, not native, now */


/* This macro returns the size field of a minimal symbol, which is normally
   stored in the "info" field.  The macro can be overridden for specific
   targets (e.g. MIPS16) that use the info field for other purposes.  */
#ifndef MSYMBOL_SIZE
#define MSYMBOL_SIZE(msym) ((long) MSYMBOL_INFO (msym))
#endif


/* We put a pointer to this structure in the read_symtab_private field
   of the psymtab.  */

struct symloc
  {

    /* Offset within the file symbol table of first local symbol for this
       file.  */

    int ldsymoff;

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

    int ldsymlen;

    /* The size of each symbol in the symbol file (in external form).  */

    int symbol_size;

    /* Further information needed to locate the symbols if they are in
       an ELF file.  */

    int symbol_offset;
    int string_offset;
    int file_string_offset;
  };

#define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
#define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
#define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
#define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
#define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
#define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
#define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)


/* Remember what we deduced to be the source language of this psymtab. */

static enum language psymtab_language = language_unknown;

/* Nonzero means give verbose info on gdb action.  From main.c.  */

extern int info_verbose;

/* The BFD for this file -- implicit parameter to next_symbol_text.  */

static bfd *symfile_bfd;

/* The size of each symbol in the symbol file (in external form).
   This is set by dbx_symfile_read when building psymtabs, and by
   dbx_psymtab_to_symtab when building symtabs.  */

static unsigned symbol_size;

/* This is the offset of the symbol table in the executable file. */

static unsigned symbol_table_offset;

/* This is the offset of the string table in the executable file. */

static unsigned string_table_offset;

/* For elf+stab executables, the n_strx field is not a simple index
   into the string table.  Instead, each .o file has a base offset in
   the string table, and the associated symbols contain offsets from
   this base.  The following two variables contain the base offset for
   the current and next .o files. */

static unsigned int file_string_table_offset;
static unsigned int next_file_string_table_offset;

/* .o and NLM files contain unrelocated addresses which are based at
   0.  When non-zero, this flag disables some of the special cases for
   Solaris elf+stab text addresses at location 0. */

static int symfile_relocatable = 0;

/* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
   relative to the function start address.  */

static int block_address_function_relative = 0;

/* The lowest text address we have yet encountered.  This is needed
   because in an a.out file, there is no header field which tells us
   what address the program is actually going to be loaded at, so we
   need to make guesses based on the symbols (which *are* relocated to
   reflect the address it will be loaded at).  */

static CORE_ADDR lowest_text_address;

/* Non-zero if there is any line number info in the objfile.  Prevents
   end_psymtab from discarding an otherwise empty psymtab.  */

static int has_line_numbers;

/* Complaints about the symbols we have encountered.  */

struct complaint lbrac_complaint =
{"bad block start address patched", 0, 0};

struct complaint string_table_offset_complaint =
{"bad string table offset in symbol %d", 0, 0};

struct complaint unknown_symtype_complaint =
{"unknown symbol type %s", 0, 0};

struct complaint unknown_symchar_complaint =
{"unknown symbol descriptor `%c'", 0, 0};

struct complaint lbrac_rbrac_complaint =
{"block start larger than block end", 0, 0};

struct complaint lbrac_unmatched_complaint =
{"unmatched N_LBRAC before symtab pos %d", 0, 0};

struct complaint lbrac_mismatch_complaint =
{"N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", 0, 0};

struct complaint repeated_header_complaint =
{"\"repeated\" header file %s not previously seen, at symtab pos %d", 0, 0};

struct complaint unclaimed_bincl_complaint =
{"N_BINCL %s not in entries for any file, at symtab pos %d", 0, 0};

/* find_text_range --- find start and end of loadable code sections

   The find_text_range function finds the shortest address range that
   encloses all sections containing executable code, and stores it in
   objfile's text_addr and text_size members.

   dbx_symfile_read will use this to finish off the partial symbol
   table, in some cases.  */

static void
find_text_range (bfd * sym_bfd, struct objfile *objfile)
{
  asection *sec;
  int found_any = 0;
  CORE_ADDR start = 0;
  CORE_ADDR end = 0;

  for (sec = sym_bfd->sections; sec; sec = sec->next)
    if (bfd_get_section_flags (sym_bfd, sec) & SEC_CODE)
      {
	CORE_ADDR sec_start = bfd_section_vma (sym_bfd, sec);
	CORE_ADDR sec_end = sec_start + bfd_section_size (sym_bfd, sec);

	if (found_any)
	  {
	    if (sec_start < start)
	      start = sec_start;
	    if (sec_end > end)
	      end = sec_end;
	  }
	else
	  {
	    start = sec_start;
	    end = sec_end;
	  }

	found_any = 1;
      }

  if (!found_any)
    error ("Can't find any code sections in symbol file");

  DBX_TEXT_ADDR (objfile) = start;
  DBX_TEXT_SIZE (objfile) = end - start;
}



/* During initial symbol readin, we need to have a structure to keep
   track of which psymtabs have which bincls in them.  This structure
   is used during readin to setup the list of dependencies within each
   partial symbol table. */

struct header_file_location
{
  char *name;			/* Name of header file */
  int instance;			/* See above */
  struct partial_symtab *pst;	/* Partial symtab that has the
				   BINCL/EINCL defs for this file */
};

/* The actual list and controling variables */
static struct header_file_location *bincl_list, *next_bincl;
static int bincls_allocated;

/* Local function prototypes */

extern void _initialize_dbxread (void);

static void process_now (struct objfile *);

static void read_ofile_symtab (struct partial_symtab *);

static void dbx_psymtab_to_symtab (struct partial_symtab *);

static void dbx_psymtab_to_symtab_1 (struct partial_symtab *);

static void read_dbx_dynamic_symtab (struct objfile *objfile);

static void read_dbx_symtab (struct objfile *);

static void free_bincl_list (struct objfile *);

static struct partial_symtab *find_corresponding_bincl_psymtab (char *, int);

static void add_bincl_to_list (struct partial_symtab *, char *, int);

static void init_bincl_list (int, struct objfile *);

static char *dbx_next_symbol_text (struct objfile *);

static void fill_symbuf (bfd *);

static void dbx_symfile_init (struct objfile *);

static void dbx_new_init (struct objfile *);

static void dbx_symfile_read (struct objfile *, int);

static void dbx_symfile_finish (struct objfile *);

static void record_minimal_symbol (char *, CORE_ADDR, int, struct objfile *);

static void add_new_header_file (char *, int);

static void add_old_header_file (char *, int);

static void add_this_object_header_file (int);

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

/* Free up old header file tables */

void
free_header_files (void)
{
  if (this_object_header_files)
    {
      xfree (this_object_header_files);
      this_object_header_files = NULL;
    }
  n_allocated_this_object_header_files = 0;
}

/* Allocate new header file tables */

void
init_header_files (void)
{
  n_allocated_this_object_header_files = 10;
  this_object_header_files = (int *) xmalloc (10 * sizeof (int));
}

/* Add header file number I for this object file
   at the next successive FILENUM.  */

static void
add_this_object_header_file (int i)
{
  if (n_this_object_header_files == n_allocated_this_object_header_files)
    {
      n_allocated_this_object_header_files *= 2;
      this_object_header_files
	= (int *) xrealloc ((char *) this_object_header_files,
		       n_allocated_this_object_header_files * sizeof (int));
    }

  this_object_header_files[n_this_object_header_files++] = i;
}

/* Add to this file an "old" header file, one already seen in
   a previous object file.  NAME is the header file's name.
   INSTANCE is its instance code, to select among multiple
   symbol tables for the same header file.  */

static void
add_old_header_file (char *name, int instance)
{
  register struct header_file *p = HEADER_FILES (current_objfile);
  register int i;

  for (i = 0; i < N_HEADER_FILES (current_objfile); i++)
    if (STREQ (p[i].name, name) && instance == p[i].instance)
      {
	add_this_object_header_file (i);
	return;
      }
  complain (&repeated_header_complaint, name, symnum);
}

/* Add to this file a "new" header file: definitions for its types follow.
   NAME is the header file's name.
   Most often this happens only once for each distinct header file,
   but not necessarily.  If it happens more than once, INSTANCE has
   a different value each time, and references to the header file
   use INSTANCE values to select among them.

   dbx output contains "begin" and "end" markers for each new header file,
   but at this level we just need to know which files there have been;
   so we record the file when its "begin" is seen and ignore the "end".  */

static void
add_new_header_file (char *name, int instance)
{
  register int i;
  register struct header_file *hfile;

  /* Make sure there is room for one more header file.  */

  i = N_ALLOCATED_HEADER_FILES (current_objfile);

  if (N_HEADER_FILES (current_objfile) == i)
    {
      if (i == 0)
	{
	  N_ALLOCATED_HEADER_FILES (current_objfile) = 10;
	  HEADER_FILES (current_objfile) = (struct header_file *)
	    xmalloc (10 * sizeof (struct header_file));
	}
      else
	{
	  i *= 2;
	  N_ALLOCATED_HEADER_FILES (current_objfile) = i;
	  HEADER_FILES (current_objfile) = (struct header_file *)
	    xrealloc ((char *) HEADER_FILES (current_objfile),
		      (i * sizeof (struct header_file)));
	}
    }

  /* Create an entry for this header file.  */

  i = N_HEADER_FILES (current_objfile)++;
  hfile = HEADER_FILES (current_objfile) + i;
  hfile->name = savestring (name, strlen (name));
  hfile->instance = instance;
  hfile->length = 10;
  hfile->vector
    = (struct type **) xmalloc (10 * sizeof (struct type *));
  memset (hfile->vector, 0, 10 * sizeof (struct type *));

  add_this_object_header_file (i);
}

#if 0
static struct type **
explicit_lookup_type (int real_filenum, int index)
{
  register struct header_file *f = &HEADER_FILES (current_objfile)[real_filenum];

  if (index >= f->length)
    {
      f->length *= 2;
      f->vector = (struct type **)
	xrealloc (f->vector, f->length * sizeof (struct type *));
      memset (&f->vector[f->length / 2],
	      '\0', f->length * sizeof (struct type *) / 2);
    }
  return &f->vector[index];
}
#endif

static void
record_minimal_symbol (char *name, CORE_ADDR address, int type,
		       struct objfile *objfile)
{
  enum minimal_symbol_type ms_type;
  int section;
  asection *bfd_section;

  switch (type)
    {
    case N_TEXT | N_EXT:
      ms_type = mst_text;
      section = SECT_OFF_TEXT (objfile);
      bfd_section = DBX_TEXT_SECTION (objfile);
      break;
    case N_DATA | N_EXT:
      ms_type = mst_data;
      section = SECT_OFF_DATA (objfile);
      bfd_section = DBX_DATA_SECTION (objfile);
      break;
    case N_BSS | N_EXT:
      ms_type = mst_bss;
      section = SECT_OFF_BSS (objfile);
      bfd_section = DBX_BSS_SECTION (objfile);
      break;
    case N_ABS | N_EXT:
      ms_type = mst_abs;
      section = -1;
      bfd_section = NULL;
      break;
#ifdef N_SETV
    case N_SETV | N_EXT:
      ms_type = mst_data;
      section = SECT_OFF_DATA (objfile);
      bfd_section = DBX_DATA_SECTION (objfile);
      break;
    case N_SETV:
      /* I don't think this type actually exists; since a N_SETV is the result
         of going over many .o files, it doesn't make sense to have one
         file local.  */
      ms_type = mst_file_data;
      section = SECT_OFF_DATA (objfile);
      bfd_section = DBX_DATA_SECTION (objfile);
      break;
#endif
    case N_TEXT:
    case N_NBTEXT:
    case N_FN:
    case N_FN_SEQ:
      ms_type = mst_file_text;
      section = SECT_OFF_TEXT (objfile);
      bfd_section = DBX_TEXT_SECTION (objfile);
      break;
    case N_DATA:
      ms_type = mst_file_data;

      /* Check for __DYNAMIC, which is used by Sun shared libraries. 
         Record it as global even if it's local, not global, so
         lookup_minimal_symbol can find it.  We don't check symbol_leading_char
         because for SunOS4 it always is '_'.  */
      if (name[8] == 'C' && STREQ ("__DYNAMIC", name))
	ms_type = mst_data;

      /* Same with virtual function tables, both global and static.  */
      {
	char *tempstring = name;
	if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd))
	  ++tempstring;
	if (is_vtable_name (tempstring))
	  ms_type = mst_data;
      }
      section = SECT_OFF_DATA (objfile);
      bfd_section = DBX_DATA_SECTION (objfile);
      break;
    case N_BSS:
      ms_type = mst_file_bss;
      section = SECT_OFF_BSS (objfile);
      bfd_section = DBX_BSS_SECTION (objfile);
      break;
    default:
      ms_type = mst_unknown;
      section = -1;
      bfd_section = NULL;
      break;
    }

  if ((ms_type == mst_file_text || ms_type == mst_text)
      && address < lowest_text_address)
    lowest_text_address = address;

  prim_record_minimal_symbol_and_info
    (name, address, ms_type, NULL, section, bfd_section, objfile);
}

/* Scan and build partial symbols for a symbol file.
   We have been initialized by a call to dbx_symfile_init, which 
   put all the relevant info into a "struct dbx_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
dbx_symfile_read (struct objfile *objfile, int mainline)
{
  bfd *sym_bfd;
  int val;
  struct cleanup *back_to;

  sym_bfd = objfile->obfd;

  /* .o and .nlm files are relocatables with text, data and bss segs based at
     0.  This flag disables special (Solaris stabs-in-elf only) fixups for
     symbols with a value of 0.  */

  symfile_relocatable = bfd_get_file_flags (sym_bfd) & HAS_RELOC;

  /* This is true for Solaris (and all other systems which put stabs
     in sections, hopefully, since it would be silly to do things
     differently from Solaris), and false for SunOS4 and other a.out
     file formats.  */
  block_address_function_relative =
    ((0 == strncmp (bfd_get_target (sym_bfd), "elf", 3))
     || (0 == strncmp (bfd_get_target (sym_bfd), "som", 3))
     || (0 == strncmp (bfd_get_target (sym_bfd), "coff", 4))
     || (0 == strncmp (bfd_get_target (sym_bfd), "pe", 2))
     || (0 == strncmp (bfd_get_target (sym_bfd), "epoc-pe", 7))
     || (0 == strncmp (bfd_get_target (sym_bfd), "nlm", 3)));

  val = bfd_seek (sym_bfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET);
  if (val < 0)
    perror_with_name (objfile->name);

  /* 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));

  symbol_size = DBX_SYMBOL_SIZE (objfile);
  symbol_table_offset = DBX_SYMTAB_OFFSET (objfile);

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

  init_minimal_symbol_collection ();
  make_cleanup_discard_minimal_symbols ();

  /* Read stabs data from executable file and define symbols. */

  read_dbx_symtab (objfile);

  /* Add the dynamic symbols.  */

  read_dbx_dynamic_symtab (objfile);

  /* Install any minimal symbols that have been collected as the current
     minimal symbols for this objfile. */

  install_minimal_symbols (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
dbx_new_init (struct objfile *ignore)
{
  stabsread_new_init ();
  buildsym_new_init ();
  init_header_files ();
}


/* dbx_symfile_init ()
   is the dbx-specific initialization routine for reading symbols.
   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.

   We read the string table into malloc'd space and stash a pointer to it.

   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.  */

#define DBX_STRINGTAB_SIZE_SIZE sizeof(long)	/* FIXME */

static void
dbx_symfile_init (struct objfile *objfile)
{
  int val;
  bfd *sym_bfd = objfile->obfd;
  char *name = bfd_get_filename (sym_bfd);
  asection *text_sect;
  unsigned char size_temp[DBX_STRINGTAB_SIZE_SIZE];

  /* Allocate struct to keep track of the symfile */
  objfile->sym_stab_info = (struct dbx_symfile_info *)
    xmmalloc (objfile->md, sizeof (struct dbx_symfile_info));
  memset ((PTR) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));

  DBX_TEXT_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
  DBX_DATA_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".data");
  DBX_BSS_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".bss");

  /* FIXME POKING INSIDE BFD DATA STRUCTURES */
#define	STRING_TABLE_OFFSET	(sym_bfd->origin + obj_str_filepos (sym_bfd))
#define	SYMBOL_TABLE_OFFSET	(sym_bfd->origin + obj_sym_filepos (sym_bfd))

  /* FIXME POKING INSIDE BFD DATA STRUCTURES */

  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 symbol 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) = obj_symbol_entry_size (sym_bfd);
  DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd);
  DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET;

  /* Read the string table and stash it away in the psymbol_obstack.  It is
     only needed as long as we need to expand psymbols into full symbols,
     so when we blow away the psymbol the string table goes away as well.
     Note that gdb used to use the results of attempting to malloc the
     string table, based on the size it read, as a form of sanity check
     for botched byte swapping, on the theory that a byte swapped string
     table size would be so totally bogus that the malloc would fail.  Now
     that we put in on the psymbol_obstack, we can't do this since gdb gets
     a fatal error (out of virtual memory) if the size is bogus.  We can
     however at least check to see if the size is less than the size of
     the size field itself, or larger than the size of the entire file.
     Note that all valid string tables have a size greater than zero, since
     the bytes used to hold the size are included in the count. */

  if (STRING_TABLE_OFFSET == 0)
    {
      /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
         will never be zero, even when there is no string table.  This
         would appear to be a bug in bfd. */
      DBX_STRINGTAB_SIZE (objfile) = 0;
      DBX_STRINGTAB (objfile) = NULL;
    }
  else
    {
      val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
      if (val < 0)
	perror_with_name (name);

      memset ((PTR) size_temp, 0, sizeof (size_temp));
      val = bfd_bread ((PTR) size_temp, sizeof (size_temp), sym_bfd);
      if (val < 0)
	{
	  perror_with_name (name);
	}
      else if (val == 0)
	{
	  /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
	     EOF if there is no string table, and attempting to read the size
	     from EOF will read zero bytes. */
	  DBX_STRINGTAB_SIZE (objfile) = 0;
	  DBX_STRINGTAB (objfile) = NULL;
	}
      else
	{
	  /* Read some data that would appear to be the string table size.
	     If there really is a string table, then it is probably the right
	     size.  Byteswap if necessary and validate the size.  Note that
	     the minimum is DBX_STRINGTAB_SIZE_SIZE.  If we just read some
	     random data that happened to be at STRING_TABLE_OFFSET, because
	     bfd can't tell us there is no string table, the sanity checks may
	     or may not catch this. */
	  DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp);

	  if (DBX_STRINGTAB_SIZE (objfile) < sizeof (size_temp)
	      || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
	    error ("ridiculous string table size (%d bytes).",
		   DBX_STRINGTAB_SIZE (objfile));

	  DBX_STRINGTAB (objfile) =
	    (char *) obstack_alloc (&objfile->psymbol_obstack,
				    DBX_STRINGTAB_SIZE (objfile));
	  OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile));

	  /* Now read in the string table in one big gulp.  */

	  val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
	  if (val < 0)
	    perror_with_name (name);
	  val = bfd_bread (DBX_STRINGTAB (objfile),
			   DBX_STRINGTAB_SIZE (objfile),
			   sym_bfd);
	  if (val != DBX_STRINGTAB_SIZE (objfile))
	    perror_with_name (name);
	}
    }
}

/* 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
dbx_symfile_finish (struct objfile *objfile)
{
  if (objfile->sym_stab_info != NULL)
    {
      if (HEADER_FILES (objfile) != NULL)
	{
	  register int i = N_HEADER_FILES (objfile);
	  register struct header_file *hfiles = HEADER_FILES (objfile);

	  while (--i >= 0)
	    {
	      xfree (hfiles[i].name);
	      xfree (hfiles[i].vector);
	    }
	  xfree (hfiles);
	}
      mfree (objfile->md, objfile->sym_stab_info);
    }
  free_header_files ();
}


/* Buffer for reading the symbol table entries.  */
static struct external_nlist symbuf[4096];
static int symbuf_idx;
static int symbuf_end;

/* cont_elem is used for continuing information in cfront.
   It saves information about which types need to be fixed up and 
   completed after all the stabs are read.  */
struct cont_elem
  {
    /* sym and stabstring for continuing information in cfront */
    struct symbol *sym;
    char *stabs;
    /* state dependencies (statics that must be preserved) */
    int sym_idx;
    int sym_end;
    int symnum;
    int (*func) (struct objfile *, struct symbol *, char *);
    /* other state dependencies include:
       (assumption is that these will not change since process_now FIXME!!)
       stringtab_global
       n_stabs
       objfile
       symfile_bfd */
  };

static struct cont_elem *cont_list = 0;
static int cont_limit = 0;
static int cont_count = 0;

/* Arrange for function F to be called with arguments SYM and P later
   in the stabs reading process.  */
void
process_later (struct symbol *sym, char *p,
	       int (*f) (struct objfile *, struct symbol *, char *))
{

  /* Allocate more space for the deferred list.  */
  if (cont_count >= cont_limit - 1)
    {
      cont_limit += 32;		/* chunk size */

      cont_list
	= (struct cont_elem *) xrealloc (cont_list,
					 (cont_limit
					  * sizeof (struct cont_elem)));
      if (!cont_list)
	error ("Virtual memory exhausted\n");
    }

  /* Save state variables so we can process these stabs later.  */
  cont_list[cont_count].sym_idx = symbuf_idx;
  cont_list[cont_count].sym_end = symbuf_end;
  cont_list[cont_count].symnum = symnum;
  cont_list[cont_count].sym = sym;
  cont_list[cont_count].stabs = p;
  cont_list[cont_count].func = f;
  cont_count++;
}

/* Call deferred funtions in CONT_LIST.  */

static void
process_now (struct objfile *objfile)
{
  int i;
  int save_symbuf_idx;
  int save_symbuf_end;
  int save_symnum;
  struct symbol *sym;
  char *stabs;
  int err;
  int (*func) (struct objfile *, struct symbol *, char *);

  /* Save the state of our caller, we'll want to restore it before
     returning.  */
  save_symbuf_idx = symbuf_idx;
  save_symbuf_end = symbuf_end;
  save_symnum = symnum;

  /* Iterate over all the deferred stabs.  */
  for (i = 0; i < cont_count; i++)
    {
      /* Restore the state for this deferred stab.  */
      symbuf_idx = cont_list[i].sym_idx;
      symbuf_end = cont_list[i].sym_end;
      symnum = cont_list[i].symnum;
      sym = cont_list[i].sym;
      stabs = cont_list[i].stabs;
      func = cont_list[i].func;

      /* Call the function to handle this deferrd stab.  */
      err = (*func) (objfile, sym, stabs);
      if (err)
	error ("Internal error: unable to resolve stab.\n");
    }

  /* Restore our caller's state.  */
  symbuf_idx = save_symbuf_idx;
  symbuf_end = save_symbuf_end;
  symnum = save_symnum;
  cont_count = 0;
}


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

/* The address in memory of the string table of the object file we are
   reading (which might not be the "main" object file, but might be a
   shared library or some other dynamically loaded thing).  This is
   set by read_dbx_symtab when building psymtabs, and by
   read_ofile_symtab when building symtabs, and is used only by
   next_symbol_text.  FIXME: If that is true, we don't need it when
   building psymtabs, right?  */
static char *stringtab_global;

/* These variables are used to control fill_symbuf when the stabs
   symbols are not contiguous (as may be the case when a COFF file is
   linked using --split-by-reloc).  */
static struct stab_section_list *symbuf_sections;
static unsigned int symbuf_left;
static unsigned int symbuf_read;

/* Refill the symbol table input buffer
   and set the variables that control fetching entries from it.
   Reports an error if no data available.
   This function can read past the end of the symbol table
   (into the string table) but this does no harm.  */

static void
fill_symbuf (bfd *sym_bfd)
{
  unsigned int count;
  int nbytes;

  if (symbuf_sections == NULL)
    count = sizeof (symbuf);
  else
    {
      if (symbuf_left <= 0)
	{
	  file_ptr filepos = symbuf_sections->section->filepos;
	  if (bfd_seek (sym_bfd, filepos, SEEK_SET) != 0)
	    perror_with_name (bfd_get_filename (sym_bfd));
	  symbuf_left = bfd_section_size (sym_bfd, symbuf_sections->section);
	  symbol_table_offset = filepos - symbuf_read;
	  symbuf_sections = symbuf_sections->next;
	}

      count = symbuf_left;
      if (count > sizeof (symbuf))
	count = sizeof (symbuf);
    }

  nbytes = bfd_bread ((PTR) symbuf, count, sym_bfd);
  if (nbytes < 0)
    perror_with_name (bfd_get_filename (sym_bfd));
  else if (nbytes == 0)
    error ("Premature end of file reading symbol table");
  symbuf_end = nbytes / symbol_size;
  symbuf_idx = 0;
  symbuf_left -= nbytes;
  symbuf_read += nbytes;
}

#define INTERNALIZE_SYMBOL(intern, extern, abfd)			\
  {									\
    (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type);		\
    (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx);		\
    (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc);  		\
    if (bfd_get_sign_extend_vma (abfd))					\
      (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value);	\
    else								\
      (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value);	\
  }

/* Invariant: The symbol pointed to by symbuf_idx is the first one
   that hasn't been swapped.  Swap the symbol at the same time
   that symbuf_idx is incremented.  */

/* dbx allows the text of a symbol name to be continued into the
   next symbol name!  When such a continuation is encountered
   (a \ at the end of the text of a name)
   call this function to get the continuation.  */

static char *
dbx_next_symbol_text (struct objfile *objfile)
{
  struct internal_nlist nlist;

  if (symbuf_idx == symbuf_end)
    fill_symbuf (symfile_bfd);

  symnum++;
  INTERNALIZE_SYMBOL (nlist, &symbuf[symbuf_idx], symfile_bfd);
  OBJSTAT (objfile, n_stabs++);

  symbuf_idx++;

  return nlist.n_strx + stringtab_global + file_string_table_offset;
}

/* Initialize the list of bincls to contain none and have some
   allocated.  */

static void
init_bincl_list (int number, struct objfile *objfile)
{
  bincls_allocated = number;
  next_bincl = bincl_list = (struct header_file_location *)
    xmmalloc (objfile->md, bincls_allocated * sizeof (struct header_file_location));
}

/* Add a bincl to the list.  */

static void
add_bincl_to_list (struct partial_symtab *pst, char *name, int instance)
{
  if (next_bincl >= bincl_list + bincls_allocated)
    {
      int offset = next_bincl - bincl_list;
      bincls_allocated *= 2;
      bincl_list = (struct header_file_location *)
	xmrealloc (pst->objfile->md, (char *) bincl_list,
		   bincls_allocated * sizeof (struct header_file_location));
      next_bincl = bincl_list + offset;
    }
  next_bincl->pst = pst;
  next_bincl->instance = instance;
  next_bincl++->name = name;
}

/* Given a name, value pair, find the corresponding
   bincl in the list.  Return the partial symtab associated
   with that header_file_location.  */

static struct partial_symtab *
find_corresponding_bincl_psymtab (char *name, int instance)
{
  struct header_file_location *bincl;

  for (bincl = bincl_list; bincl < next_bincl; bincl++)
    if (bincl->instance == instance
	&& STREQ (name, bincl->name))
      return bincl->pst;

  complain (&repeated_header_complaint, name, symnum);
  return (struct partial_symtab *) 0;
}

/* Free the storage allocated for the bincl list.  */

static void
free_bincl_list (struct objfile *objfile)
{
  mfree (objfile->md, (PTR) bincl_list);
  bincls_allocated = 0;
}

static void
do_free_bincl_list_cleanup (void *objfile)
{
  free_bincl_list (objfile);
}

static struct cleanup *
make_cleanup_free_bincl_list (struct objfile *objfile)
{
  return make_cleanup (do_free_bincl_list_cleanup, objfile);
}

/* Scan a SunOs dynamic symbol table for symbols of interest and
   add them to the minimal symbol table.  */

static void
read_dbx_dynamic_symtab (struct objfile *objfile)
{
  bfd *abfd = objfile->obfd;
  struct cleanup *back_to;
  int counter;
  long dynsym_size;
  long dynsym_count;
  asymbol **dynsyms;
  asymbol **symptr;
  arelent **relptr;
  long dynrel_size;
  long dynrel_count;
  arelent **dynrels;
  CORE_ADDR sym_value;
  char *name;

  /* Check that the symbol file has dynamic symbols that we know about.
     bfd_arch_unknown can happen if we are reading a sun3 symbol file
     on a sun4 host (and vice versa) and bfd is not configured
     --with-target=all.  This would trigger an assertion in bfd/sunos.c,
     so we ignore the dynamic symbols in this case.  */
  if (bfd_get_flavour (abfd) != bfd_target_aout_flavour
      || (bfd_get_file_flags (abfd) & DYNAMIC) == 0
      || bfd_get_arch (abfd) == bfd_arch_unknown)
    return;

  dynsym_size = bfd_get_dynamic_symtab_upper_bound (abfd);
  if (dynsym_size < 0)
    return;

  dynsyms = (asymbol **) xmalloc (dynsym_size);
  back_to = make_cleanup (xfree, dynsyms);

  dynsym_count = bfd_canonicalize_dynamic_symtab (abfd, dynsyms);
  if (dynsym_count < 0)
    {
      do_cleanups (back_to);
      return;
    }

  /* Enter dynamic symbols into the minimal symbol table
     if this is a stripped executable.  */
  if (bfd_get_symcount (abfd) <= 0)
    {
      symptr = dynsyms;
      for (counter = 0; counter < dynsym_count; counter++, symptr++)
	{
	  asymbol *sym = *symptr;
	  asection *sec;
	  int type;

	  sec = bfd_get_section (sym);

	  /* BFD symbols are section relative.  */
	  sym_value = sym->value + sec->vma;

	  if (bfd_get_section_flags (abfd, sec) & SEC_CODE)
	    {
	      sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
	      type = N_TEXT;
	    }
	  else if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
	    {
	      sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));
	      type = N_DATA;
	    }
	  else if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
	    {
	      sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_BSS (objfile));
	      type = N_BSS;
	    }
	  else
	    continue;

	  if (sym->flags & BSF_GLOBAL)
	    type |= N_EXT;

	  record_minimal_symbol ((char *) bfd_asymbol_name (sym), sym_value,
				 type, objfile);
	}
    }

  /* Symbols from shared libraries have a dynamic relocation entry
     that points to the associated slot in the procedure linkage table.
     We make a mininal symbol table entry with type mst_solib_trampoline
     at the address in the procedure linkage table.  */
  dynrel_size = bfd_get_dynamic_reloc_upper_bound (abfd);
  if (dynrel_size < 0)
    {
      do_cleanups (back_to);
      return;
    }

  dynrels = (arelent **) xmalloc (dynrel_size);
  make_cleanup (xfree, dynrels);

  dynrel_count = bfd_canonicalize_dynamic_reloc (abfd, dynrels, dynsyms);
  if (dynrel_count < 0)
    {
      do_cleanups (back_to);
      return;
    }

  for (counter = 0, relptr = dynrels;
       counter < dynrel_count;
       counter++, relptr++)
    {
      arelent *rel = *relptr;
      CORE_ADDR address =
      rel->address + ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));

      switch (bfd_get_arch (abfd))
	{
	case bfd_arch_sparc:
	  if (rel->howto->type != RELOC_JMP_SLOT)
	    continue;
	  break;
	case bfd_arch_m68k:
	  /* `16' is the type BFD produces for a jump table relocation.  */
	  if (rel->howto->type != 16)
	    continue;

	  /* Adjust address in the jump table to point to
	     the start of the bsr instruction.  */
	  address -= 2;
	  break;
	default:
	  continue;
	}

      name = (char *) bfd_asymbol_name (*rel->sym_ptr_ptr);
      prim_record_minimal_symbol (name, address, mst_solib_trampoline,
				  objfile);
    }

  do_cleanups (back_to);
}

/* Setup partial_symtab's describing each source file for which
   debugging information is available. */

static void
read_dbx_symtab (struct objfile *objfile)
{
  register struct external_nlist *bufp = 0;	/* =0 avoids gcc -Wall glitch */
  struct internal_nlist nlist;
  CORE_ADDR text_addr;
  int text_size;

  register char *namestring;
  int nsl;
  int past_first_source_file = 0;
  CORE_ADDR last_o_file_start = 0;
  CORE_ADDR last_function_start = 0;
  struct cleanup *back_to;
  bfd *abfd;
  int textlow_not_set;

  /* Current partial symtab */
  struct partial_symtab *pst;

  /* 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;

  text_addr = DBX_TEXT_ADDR (objfile);
  text_size = DBX_TEXT_SIZE (objfile);

  /* FIXME.  We probably want to change stringtab_global rather than add this
     while processing every symbol entry.  FIXME.  */
  file_string_table_offset = 0;
  next_file_string_table_offset = 0;

  stringtab_global = DBX_STRINGTAB (objfile);

  pst = (struct partial_symtab *) 0;

  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 *));

  /* Init bincl list */
  init_bincl_list (20, objfile);
  back_to = make_cleanup_free_bincl_list (objfile);

  last_source_file = NULL;

  lowest_text_address = (CORE_ADDR) -1;

  symfile_bfd = objfile->obfd;	/* For next_text_symbol */
  abfd = objfile->obfd;
  symbuf_end = symbuf_idx = 0;
  next_symbol_text_func = dbx_next_symbol_text;
  textlow_not_set = 1;
  has_line_numbers = 0;

  for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++)
    {
      /* Get the symbol for this run and pull out some info */
      QUIT;			/* allow this to be interruptable */
      if (symbuf_idx == symbuf_end)
	fill_symbuf (abfd);
      bufp = &symbuf[symbuf_idx++];

      /*
       * Special case to speed up readin.
       */
      if (bfd_h_get_8 (abfd, bufp->e_type) == N_SLINE)
	{
	  has_line_numbers = 1;
	  continue;
	}

      INTERNALIZE_SYMBOL (nlist, bufp, abfd);
      OBJSTAT (objfile, n_stabs++);

      /* Ok.  There is a lot of code duplicated in the rest of this
         switch statement (for efficiency reasons).  Since I don't
         like duplicating code, I will do my penance here, and
         describe the code which is duplicated:

         *) The assignment to namestring.
         *) The call to strchr.
         *) The addition of a partial symbol the the two partial
         symbol lists.  This last is a large section of code, so
         I've imbedded it in the following macro.
       */

/* Set namestring based on nlist.  If the string table index is invalid, 
   give a fake name, and print a single error message per symbol file read,
   rather than abort the symbol reading or flood the user with messages.  */

/*FIXME: Too many adds and indirections in here for the inner loop.  */
#define SET_NAMESTRING()\
  if (((unsigned)CUR_SYMBOL_STRX + file_string_table_offset) >=		\
      DBX_STRINGTAB_SIZE (objfile)) {					\
    complain (&string_table_offset_complaint, symnum);			\
    namestring = "<bad string table offset>";				\
  } else								\
    namestring = CUR_SYMBOL_STRX + file_string_table_offset +		\
		 DBX_STRINGTAB (objfile)

#define CUR_SYMBOL_TYPE nlist.n_type
#define CUR_SYMBOL_VALUE nlist.n_value
#define CUR_SYMBOL_STRX nlist.n_strx
#define DBXREAD_ONLY
#define START_PSYMTAB(ofile,fname,low,symoff,global_syms,static_syms)\
  start_psymtab(ofile, fname, low, symoff, global_syms, static_syms)
#define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)\
  end_psymtab(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)

#include "partial-stab.h"
    }

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

  if (pst)
    {
      /* Don't set pst->texthigh lower than it already is.  */
      CORE_ADDR text_end =
      (lowest_text_address == (CORE_ADDR) -1
       ? (text_addr + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)))
       : lowest_text_address)
      + text_size;

      end_psymtab (pst, psymtab_include_list, includes_used,
		   symnum * symbol_size,
		   text_end > pst->texthigh ? text_end : pst->texthigh,
		   dependency_list, dependencies_used, textlow_not_set);
    }

  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 *
start_psymtab (struct objfile *objfile, char *filename, CORE_ADDR textlow,
	       int ldsymoff, 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;
  result->read_symtab = dbx_psymtab_to_symtab;
  SYMBOL_SIZE (result) = symbol_size;
  SYMBOL_OFFSET (result) = symbol_table_offset;
  STRING_OFFSET (result) = string_table_offset;
  FILE_STRING_OFFSET (result) = file_string_table_offset;

  /* If we're handling an ELF file, drag some section-relocation info
     for this source file out of the ELF symbol table, to compensate for
     Sun brain death.  This replaces the section_offsets in this psymtab,
     if successful.  */
  elfstab_offset_sections (objfile, result);

  /* 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.  */

struct partial_symtab *
end_psymtab (struct partial_symtab *pst, char **include_list, int num_includes,
	     int capping_symbol_offset, CORE_ADDR capping_text,
	     struct partial_symtab **dependency_list, int number_dependencies,
	     int textlow_not_set)
{
  int i;
  struct objfile *objfile = pst->objfile;

  if (capping_symbol_offset != -1)
    LDSYMLEN (pst) = capping_symbol_offset - LDSYMOFF (pst);
  pst->texthigh = capping_text;

#ifdef SOFUN_ADDRESS_MAYBE_MISSING
  /* 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 not set (ie: textlow_not_set), 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.  */

  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 + 2);
      strncpy (p, last_function_name, n);
      p[n] = 0;

      minsym = lookup_minimal_symbol (p, pst->filename, objfile);
      if (minsym == NULL)
	{
	  /* Sun Fortran appends an underscore to the minimal symbol name,
	     try again with an appended underscore if the minimal symbol
	     was not found.  */
	  p[n] = '_';
	  p[n + 1] = 0;
	  minsym = lookup_minimal_symbol (p, pst->filename, objfile);
	}

      if (minsym)
	pst->texthigh = SYMBOL_VALUE_ADDRESS (minsym) + MSYMBOL_SIZE (minsym);

      last_function_name = NULL;
    }

  /* this test will be true if the last .o file is only data */
  if (textlow_not_set)
    pst->textlow = pst->texthigh;
  else
    {
      struct partial_symtab *p1;

      /* 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.  */

      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.  */
#endif /* SOFUN_ADDRESS_MAYBE_MISSING.  */

  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);

      /* Copy the sesction_offsets array from the main psymtab. */
      subpst->section_offsets = pst->section_offsets;
      subpst->read_symtab_private =
	(char *) obstack_alloc (&objfile->psymbol_obstack,
				sizeof (struct symloc));
      LDSYMOFF (subpst) =
	LDSYMLEN (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
      && has_line_numbers == 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.  */
      /* Empty psymtabs happen as a result of header files which don't have
         any symbols in them.  There can be a lot of them.  But this check
         is wrong, in that a psymtab with N_SLINE entries but nothing else
         is not empty, but we don't realize that.  Fixing that without slowing
         things down might be tricky.  */

      discard_psymtab (pst);

      /* Indicate that psymtab was thrown away.  */
      pst = (struct partial_symtab *) NULL;
    }
  return pst;
}

static void
dbx_psymtab_to_symtab_1 (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);
	  }
	dbx_psymtab_to_symtab_1 (pst->dependencies[i]);
      }

  if (LDSYMLEN (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);
      file_string_table_offset = FILE_STRING_OFFSET (pst);
      symbol_size = SYMBOL_SIZE (pst);

      /* Read in this file's symbols */
      bfd_seek (pst->objfile->obfd, SYMBOL_OFFSET (pst), SEEK_SET);
      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
dbx_psymtab_to_symtab (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 (LDSYMLEN (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;

      next_symbol_text_func = dbx_next_symbol_text;

      dbx_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
read_ofile_symtab (struct partial_symtab *pst)
{
  register char *namestring;
  register struct external_nlist *bufp;
  struct internal_nlist nlist;
  unsigned char type;
  unsigned max_symnum;
  register bfd *abfd;
  struct objfile *objfile;
  int sym_offset;		/* Offset to start of symbols to read */
  int sym_size;			/* Size of symbols to read */
  CORE_ADDR text_offset;	/* Start of text segment for symbols */
  int text_size;		/* Size of text segment for symbols */
  struct section_offsets *section_offsets;

  objfile = pst->objfile;
  sym_offset = LDSYMOFF (pst);
  sym_size = LDSYMLEN (pst);
  text_offset = pst->textlow;
  text_size = pst->texthigh - pst->textlow;
  /* This cannot be simply objfile->section_offsets because of
     elfstab_offset_sections() which initializes the psymtab section
     offsets information in a special way, and that is different from
     objfile->section_offsets. */ 
  section_offsets = pst->section_offsets;

  current_objfile = objfile;
  subfile_stack = NULL;

  stringtab_global = DBX_STRINGTAB (objfile);
  last_source_file = NULL;

  abfd = objfile->obfd;
  symfile_bfd = objfile->obfd;	/* Implicit param to next_text_symbol */
  symbuf_end = symbuf_idx = 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)
    {
      bfd_seek (symfile_bfd, sym_offset - symbol_size, SEEK_CUR);
      fill_symbuf (abfd);
      bufp = &symbuf[symbuf_idx++];
      INTERNALIZE_SYMBOL (nlist, bufp, abfd);
      OBJSTAT (objfile, n_stabs++);

      SET_NAMESTRING ();

      processing_gcc_compilation = 0;
      if (nlist.n_type == N_TEXT)
	{
	  const char *tempstring = namestring;

	  if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
	    processing_gcc_compilation = 1;
	  else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
	    processing_gcc_compilation = 2;
	  if (tempstring[0] == bfd_get_symbol_leading_char (symfile_bfd))
	    ++tempstring;
	  if (STREQN (tempstring, "__gnu_compiled", 14))
	    processing_gcc_compilation = 2;
	}

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

#if 0
      /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
	 know whether it will use the old style or v3 mangling.  */
      if (processing_gcc_compilation)
	{
	  if (AUTO_DEMANGLING)
	    {
	      set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
	    }
	}
#endif
    }
  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;
    }

  if (symbuf_idx == symbuf_end)
    fill_symbuf (abfd);
  bufp = &symbuf[symbuf_idx];
  if (bfd_h_get_8 (abfd, bufp->e_type) != N_SO)
    error ("First symbol in segment of executable not a source symbol");

  max_symnum = sym_size / symbol_size;

  for (symnum = 0;
       symnum < max_symnum;
       symnum++)
    {
      QUIT;			/* Allow this to be interruptable */
      if (symbuf_idx == symbuf_end)
	fill_symbuf (abfd);
      bufp = &symbuf[symbuf_idx++];
      INTERNALIZE_SYMBOL (nlist, bufp, abfd);
      OBJSTAT (objfile, n_stabs++);

      type = bfd_h_get_8 (abfd, bufp->e_type);

      SET_NAMESTRING ();

      if (type & N_STAB)
	{
	  process_one_symbol (type, nlist.n_desc, nlist.n_value,
			      namestring, section_offsets, objfile);
	}
      /* We skip checking for a new .o or -l file; that should never
         happen in this routine. */
      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 0
	  /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
	     know whether it will use the old style or v3 mangling.  */
	  if (AUTO_DEMANGLING)
	    {
	      set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
	    }
#endif
	}
      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. */
	  ;
	}
    }

  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;

  /* In reordered executables last_source_start_addr may not be the
     lower bound for this symtab, instead use text_offset which comes
     from pst->textlow which is correct.  */
  if (last_source_start_addr > text_offset)
    last_source_start_addr = text_offset;

  pst->symtab = end_symtab (text_offset + text_size, objfile, SECT_OFF_TEXT (objfile));

  /* Process items which we had to "process_later" due to dependencies 
     on other stabs.  */
  process_now (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.
   Note that these section_offsets are not the 
   objfile->section_offsets but the pst->section_offsets.
   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.  */

void
process_one_symbol (int type, int desc, CORE_ADDR valu, char *name,
		    struct section_offsets *section_offsets,
		    struct objfile *objfile)
{
#ifdef SUN_FIXED_LBRAC_BUG
  /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need
     to correct the address of N_LBRAC's.  If it is not defined, then
     we never need to correct the addresses.  */

  /* This records the last pc address we've seen.  We depend on there being
     an SLINE or FUN or SO before the first LBRAC, since the variable does
     not get reset in between reads of different symbol files.  */
  static CORE_ADDR last_pc_address;
#endif

  register struct context_stack *new;
  /* This remembers the address of the start of a function.  It is used
     because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are
     relative to the current function's start address.  On systems
     other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is
     used to relocate these symbol types rather than SECTION_OFFSETS.  */
  static CORE_ADDR function_start_offset;

  /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source
     file.  Used to detect the SunPRO solaris compiler.  */
  static int n_opt_found;

  /* 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 (!block_address_function_relative)
    /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
       function start address, so just use the text offset.  */
    function_start_offset = ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));

  /* 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;
    }

  switch (type)
    {
    case N_FUN:
    case N_FNAME:

      if (*name == '\000')
	{
	  /* This N_FUN marks the end of a function.  This closes off the
	     current block.  */
	  within_function = 0;
	  new = pop_context ();

	  /* Make a block for the local symbols within.  */
	  finish_block (new->name, &local_symbols, new->old_blocks,
			new->start_addr, new->start_addr + valu,
			objfile);

	  /* May be switching to an assembler file which may not be using
	     block relative stabs, so reset the offset.  */
	  if (block_address_function_relative)
	    function_start_offset = 0;

	  break;
	}

      /* Relocate for dynamic loading */
      valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
#ifdef SMASH_TEXT_ADDRESS
      SMASH_TEXT_ADDRESS (valu);
#endif
      goto define_a_symbol;

    case N_LBRAC:
      /* This "symbol" just indicates the start of an inner lexical
         context within a function.  */

      /* Ignore extra outermost context from SunPRO cc and acc.  */
      if (n_opt_found && desc == 1)
	break;

      if (block_address_function_relative)
	/* Relocate for Sun ELF acc fn-relative syms.  */
	valu += function_start_offset;
      else
	/* On most machines, the block addresses are relative to the
	   N_SO, the linker did not relocate them (sigh).  */
	valu += last_source_start_addr;

#ifdef SUN_FIXED_LBRAC_BUG
      if (!SUN_FIXED_LBRAC_BUG && valu < last_pc_address)
	{
	  /* Patch current LBRAC pc value to match last handy pc value */
	  complain (&lbrac_complaint);
	  valu = last_pc_address;
	}
#endif
      new = push_context (desc, valu);
      break;

    case N_RBRAC:
      /* This "symbol" just indicates the end of an inner lexical
         context that was started with N_LBRAC.  */

      /* Ignore extra outermost context from SunPRO cc and acc.  */
      if (n_opt_found && desc == 1)
	break;

      if (block_address_function_relative)
	/* Relocate for Sun ELF acc fn-relative syms.  */
	valu += function_start_offset;
      else
	/* On most machines, the block addresses are relative to the
	   N_SO, the linker did not relocate them (sigh).  */
	valu += last_source_start_addr;

      new = pop_context ();
      if (desc != new->depth)
	complain (&lbrac_mismatch_complaint, symnum);

      /* Some compilers put the variable decls inside of an
         LBRAC/RBRAC block.  This macro should be nonzero if this
         is true.  DESC is N_DESC from the N_RBRAC symbol.
         GCC_P is true if we've detected the GCC_COMPILED_SYMBOL
         or the GCC2_COMPILED_SYMBOL.  */
#if !defined (VARIABLES_INSIDE_BLOCK)
#define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
#endif

      /* Can only use new->locals as local symbols here if we're in
         gcc or on a machine that puts them before the lbrack.  */
      if (!VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation))
	local_symbols = new->locals;

      if (context_stack_depth
	  > !VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation))
	{
	  /* 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
	{
	  /* This is the outermost LBRAC...RBRAC pair.  There is no
	     need to do anything; leave the symbols that preceded it
	     to be attached to the function's own block.  We need to
	     indicate that we just moved outside of the function.  */
	  within_function = 0;
	}

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

    case N_FN:
    case N_FN_SEQ:
      /* This kind of symbol indicates the start of an object file.  */
      /* Relocate for dynamic loading */
      valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
      break;

    case N_SO:
      /* This type of symbol indicates the start of data
         for one source file.
         Finish the symbol table of the previous source file
         (if any) and start accumulating a new symbol table.  */
      /* Relocate for dynamic loading */
      valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));

      n_opt_found = 0;

#ifdef SUN_FIXED_LBRAC_BUG
      last_pc_address = valu;	/* Save for SunOS bug circumcision */
#endif

#ifdef PCC_SOL_BROKEN
      /* pcc bug, occasionally puts out SO for SOL.  */
      if (context_stack_depth > 0)
	{
	  start_subfile (name, NULL);
	  break;
	}
#endif
      if (last_source_file)
	{
	  /* Check if previous symbol was also an N_SO (with some
	     sanity checks).  If so, that one was actually the directory
	     name, and the current one is the real file name.
	     Patch things up. */
	  if (previous_stab_code == (unsigned char) N_SO)
	    {
	      patch_subfile_names (current_subfile, name);
	      break;		/* Ignore repeated SOs */
	    }
	  end_symtab (valu, objfile, SECT_OFF_TEXT (objfile));
	  end_stabs ();
	}

      /* Null name means this just marks the end of text for this .o file.
         Don't start a new symtab in this case.  */
      if (*name == '\000')
	break;

      if (block_address_function_relative)
	function_start_offset = 0;

      start_stabs ();
      start_symtab (name, NULL, valu);
      record_debugformat ("stabs");
      break;

    case N_SOL:
      /* This type of symbol indicates the start of data for
         a sub-source-file, one whose contents were copied or
         included in the compilation of the main source file
         (whose name was given in the N_SO symbol.)  */
      /* Relocate for dynamic loading */
      valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
      start_subfile (name, current_subfile->dirname);
      break;

    case N_BINCL:
      push_subfile ();
      add_new_header_file (name, valu);
      start_subfile (name, current_subfile->dirname);
      break;

    case N_EINCL:
      start_subfile (pop_subfile (), current_subfile->dirname);
      break;

    case N_EXCL:
      add_old_header_file (name, valu);
      break;

    case N_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 += function_start_offset;

#ifdef SUN_FIXED_LBRAC_BUG
      last_pc_address = valu;	/* Save for SunOS bug circumcision */
#endif
      record_line (current_subfile, desc, valu);
      break;

    case N_BCOMM:
      common_block_start (name, objfile);
      break;

    case N_ECOMM:
      common_block_end (objfile);
      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_STSYM:		/* Static symbol in data seg */
    case N_LCSYM:		/* Static symbol in BSS seg */
    case N_ROSYM:		/* Static symbol in Read-only data seg */
      /* HORRID HACK DEPT.  However, it's Sun's furgin' fault.
         Solaris2's stabs-in-elf makes *most* symbols relative
         but leaves a few absolute (at least for Solaris 2.1 and version
         2.0.1 of the SunPRO compiler).  N_STSYM and friends sit on the fence.
         .stab "foo:S...",N_STSYM        is absolute (ld relocates it)
         .stab "foo:V...",N_STSYM        is relative (section base subtracted).
         This leaves us no choice but to search for the 'S' or 'V'...
         (or pass the whole section_offsets stuff down ONE MORE function
         call level, which we really don't want to do).  */
      {
	char *p;

	/* .o files and NLMs have non-zero text seg offsets, but don't need
	   their static syms offset in this fashion.  XXX - This is really a
	   crock that should be fixed in the solib handling code so that I
	   don't have to work around it here. */

	if (!symfile_relocatable)
	  {
	    p = strchr (name, ':');
	    if (p != 0 && p[1] == 'S')
	      {
		/* The linker relocated it.  We don't want to add an
		   elfstab_offset_sections-type offset, but we *do* want
		   to add whatever solib.c passed to symbol_file_add as
		   addr (this is known to affect SunOS4, and I suspect ELF
		   too).  Since elfstab_offset_sections currently does not
		   muck with the text offset (there is no Ttext.text
		   symbol), we can get addr from the text offset.  If
		   elfstab_offset_sections ever starts dealing with the
		   text offset, and we still need to do this, we need to
		   invent a SECT_OFF_ADDR_KLUDGE or something.  */
		valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
		goto define_a_symbol;
	      }
	  }
	/* Since it's not the kludge case, re-dispatch to the right handler. */
	switch (type)
	  {
	  case N_STSYM:
	    goto case_N_STSYM;
	  case N_LCSYM:
	    goto case_N_LCSYM;
	  case N_ROSYM:
	    goto case_N_ROSYM;
	  default:
	    internal_error (__FILE__, __LINE__, "failed internal consistency check");
	  }
      }

    case_N_STSYM:		/* Static symbol in data seg */
    case N_DSLINE:		/* Source line number, data seg */
      valu += ANOFFSET (section_offsets, SECT_OFF_DATA (objfile));
      goto define_a_symbol;

    case_N_LCSYM:		/* Static symbol in BSS seg */
    case N_BSLINE:		/* Source line number, bss seg */
      /*   N_BROWS:       overlaps with N_BSLINE */
      valu += ANOFFSET (section_offsets, SECT_OFF_BSS (objfile));
      goto define_a_symbol;

    case_N_ROSYM:		/* Static symbol in Read-only data seg */
      valu += ANOFFSET (section_offsets, SECT_OFF_RODATA (objfile));
      goto define_a_symbol;

    case N_ENTRY:		/* Alternate entry point */
      /* Relocate for dynamic loading */
      valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
      goto define_a_symbol;

      /* The following symbol types we don't know how to process.  Handle
         them in a "default" way, but complain to people who care.  */
    default:
    case N_CATCH:		/* Exception handler catcher */
    case N_EHDECL:		/* Exception handler name */
    case N_PC:			/* Global symbol in Pascal */
    case N_M2C:		/* Modula-2 compilation unit */
      /*   N_MOD2:        overlaps with N_EHDECL */
    case N_SCOPE:		/* Modula-2 scope information */
    case N_ECOML:		/* End common (local name) */
    case N_NBTEXT:		/* Gould Non-Base-Register symbols??? */
    case N_NBDATA:
    case N_NBBSS:
    case N_NBSTS:
    case N_NBLCS:
      complain (&unknown_symtype_complaint, local_hex_string (type));
      /* FALLTHROUGH */

      /* The following symbol types don't need the address field relocated,
         since it is either unused, or is absolute.  */
    define_a_symbol:
    case N_GSYM:		/* Global variable */
    case N_NSYMS:		/* Number of symbols (ultrix) */
    case N_NOMAP:		/* No map?  (ultrix) */
    case N_RSYM:		/* Register variable */
    case N_DEFD:		/* Modula-2 GNU module dependency */
    case N_SSYM:		/* Struct or union element */
    case N_LSYM:		/* Local symbol in stack */
    case N_PSYM:		/* Parameter variable */
    case N_LENG:		/* Length of preceding symbol type */
      if (name)
	{
	  int deftype;
	  char *colon_pos = strchr (name, ':');
	  if (colon_pos == NULL)
	    deftype = '\0';
	  else
	    deftype = colon_pos[1];

	  switch (deftype)
	    {
	    case 'f':
	    case 'F':
	      function_stab_type = type;

#ifdef SOFUN_ADDRESS_MAYBE_MISSING
	      /* Deal with the SunPRO 3.0 compiler which omits the address
	         from N_FUN symbols.  */
	      if (type == N_FUN
		  && valu == ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)))
		{
		  CORE_ADDR minsym_valu = 
		    find_stab_function_addr (name, last_source_file, objfile);

		  /* find_stab_function_addr will return 0 if the minimal
		     symbol wasn't found.  (Unfortunately, this might also
		     be a valid address.)  Anyway, if it *does* return 0,
		     it is likely that the value was set correctly to begin
		     with... */
		  if (minsym_valu != 0)
		    valu = minsym_valu;
		}
#endif

#ifdef SUN_FIXED_LBRAC_BUG
	      /* The Sun acc compiler, under SunOS4, puts out
	         functions with N_GSYM or N_STSYM.  The problem is
	         that the address of the symbol is no good (for N_GSYM
	         it doesn't even attept an address; for N_STSYM it
	         puts out an address but then it gets relocated
	         relative to the data segment, not the text segment).
	         Currently we can't fix this up later as we do for
	         some types of symbol in scan_file_globals.
	         Fortunately we do have a way of finding the address -
	         we know that the value in last_pc_address is either
	         the one we want (if we're dealing with the first
	         function in an object file), or somewhere in the
	         previous function. This means that we can use the
	         minimal symbol table to get the address.  */

	      /* Starting with release 3.0, the Sun acc compiler,
	         under SunOS4, puts out functions with N_FUN and a value
	         of zero. This gets relocated to the start of the text
	         segment of the module, which is no good either.
	         Under SunOS4 we can deal with this as N_SLINE and N_SO
	         entries contain valid absolute addresses.
	         Release 3.0 acc also puts out N_OPT entries, which makes
	         it possible to discern acc from cc or gcc.  */

	      if (type == N_GSYM || type == N_STSYM
		  || (type == N_FUN
		      && n_opt_found && !block_address_function_relative))
		{
		  struct minimal_symbol *m;
		  int l = colon_pos - name;

		  m = lookup_minimal_symbol_by_pc (last_pc_address);
		  if (m && STREQN (SYMBOL_NAME (m), name, l)
		      && SYMBOL_NAME (m)[l] == '\0')
		    /* last_pc_address was in this function */
		    valu = SYMBOL_VALUE (m);
		  else if (m && SYMBOL_NAME (m + 1)
			   && STREQN (SYMBOL_NAME (m + 1), name, l)
			   && SYMBOL_NAME (m + 1)[l] == '\0')
		    /* last_pc_address was in last function */
		    valu = SYMBOL_VALUE (m + 1);
		  else
		    /* Not found - use last_pc_address (for finish_block) */
		    valu = last_pc_address;
		}

	      last_pc_address = valu;	/* Save for SunOS bug circumcision */
#endif

	      if (block_address_function_relative)
		/* For Solaris 2.0 compilers, the block addresses and
		   N_SLINE's are relative to the start of the
		   function.  On normal systems, and when using gcc on
		   Solaris 2.0, these addresses are just absolute, or
		   relative to the N_SO, depending on
		   BLOCK_ADDRESS_ABSOLUTE.  */
		function_start_offset = valu;

	      within_function = 1;

	      if (context_stack_depth > 1)
		{
		  complain (&lbrac_unmatched_complaint, symnum);
		  break;
		}

	      if (context_stack_depth > 0)
		{
		  new = pop_context ();
		  /* Make a block for the local symbols within.  */
		  finish_block (new->name, &local_symbols, new->old_blocks,
				new->start_addr, valu, objfile);
		}

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

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

      /* We use N_OPT to carry the gcc2_compiled flag.  Sun uses it
         for a bunch of other flags, too.  Someday we may parse their
         flags; for now we ignore theirs and hope they'll ignore ours.  */
    case N_OPT:		/* Solaris 2:  Compiler options */
      if (name)
	{
	  if (STREQ (name, GCC2_COMPILED_FLAG_SYMBOL))
	    {
	      processing_gcc_compilation = 2;
#if 0				/* Works, but is experimental.  -fnf */
	      /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
		 know whether it will use the old style or v3 mangling.  */
	      if (AUTO_DEMANGLING)
		{
		  set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
		}
#endif
	    }
	  else
	    n_opt_found = 1;
	}
      break;

    case N_MAIN:		/* Name of main routine.  */
      /* FIXME: If one has a symbol file with N_MAIN and then replaces
	 it with a symbol file with "main" and without N_MAIN.  I'm
	 not sure exactly what rule to follow but probably something
	 like: N_MAIN takes precedence over "main" no matter what
	 objfile it is in; If there is more than one N_MAIN, choose
	 the one in the symfile_objfile; If there is more than one
	 N_MAIN within a given objfile, complain() and choose
	 arbitrarily. (kingdon) */
      if (name != NULL)
	set_main_name (name);
      break;

      /* The following symbol types can be ignored.  */
    case N_OBJ:		/* Solaris 2:  Object file dir and name */
      /*   N_UNDF:                   Solaris 2:  file separator mark */
      /*   N_UNDF: -- we will never encounter it, since we only process one
         file's symbols at once.  */
    case N_ENDM:		/* Solaris 2:  End of module */
    case N_ALIAS:		/* SunPro F77: alias name, ignore for now.  */
      break;
    }

  /* '#' is a GNU C extension to allow one symbol to refer to another
     related symbol.

     Generally this is used so that an alias can refer to its main
     symbol.  */
  if (name[0] == '#')
    {
      /* Initialize symbol reference names and determine if this is 
         a definition.  If symbol reference is being defined, go 
         ahead and add it.  Otherwise, just return sym. */

      char *s = name;
      int refnum;

      /* If this stab defines a new reference ID that is not on the
         reference list, then put it on the reference list.

         We go ahead and advance NAME past the reference, even though
         it is not strictly necessary at this time.  */
      refnum = symbol_reference_defined (&s);
      if (refnum >= 0)
	if (!ref_search (refnum))
	  ref_add (refnum, 0, name, valu);
      name = s;
    }


  previous_stab_code = type;
}

/* FIXME: The only difference between this and elfstab_build_psymtabs
   is the call to install_minimal_symbols for elf, and the support for
   split sections.  If the differences are really that small, the code
   should be shared.  */

/* Scan and build partial symbols for an coff symbol file.
   The coff file has already been processed to get its minimal symbols.

   This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
   rolled into one.

   OBJFILE is the object file we are reading symbols from.
   ADDR is the address relative to which the symbols are (e.g.
   the base address of the text segment).
   MAINLINE is true if we are reading the main symbol
   table (as opposed to a shared lib or dynamically loaded file).
   TEXTADDR is the address of the text section.
   TEXTSIZE is the size of the text section.
   STABSECTS is the list of .stab sections in OBJFILE.
   STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
   .stabstr section exists.

   This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
   adjusted for coff details. */

void
coffstab_build_psymtabs (struct objfile *objfile, int mainline,
			 CORE_ADDR textaddr, unsigned int textsize,
			 struct stab_section_list *stabsects,
			 file_ptr stabstroffset, unsigned int stabstrsize)
{
  int val;
  bfd *sym_bfd = objfile->obfd;
  char *name = bfd_get_filename (sym_bfd);
  struct dbx_symfile_info *info;
  unsigned int stabsize;

  /* There is already a dbx_symfile_info allocated by our caller.
     It might even contain some info from the coff symtab to help us.  */
  info = objfile->sym_stab_info;

  DBX_TEXT_ADDR (objfile) = textaddr;
  DBX_TEXT_SIZE (objfile) = textsize;

#define	COFF_STABS_SYMBOL_SIZE	12	/* XXX FIXME XXX */
  DBX_SYMBOL_SIZE (objfile) = COFF_STABS_SYMBOL_SIZE;
  DBX_STRINGTAB_SIZE (objfile) = stabstrsize;

  if (stabstrsize > bfd_get_size (sym_bfd))
    error ("ridiculous string table size: %d bytes", stabstrsize);
  DBX_STRINGTAB (objfile) = (char *)
    obstack_alloc (&objfile->psymbol_obstack, stabstrsize + 1);
  OBJSTAT (objfile, sz_strtab += stabstrsize + 1);

  /* Now read in the string table in one big gulp.  */

  val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
  if (val < 0)
    perror_with_name (name);
  val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
  if (val != stabstrsize)
    perror_with_name (name);

  stabsread_new_init ();
  buildsym_new_init ();
  free_header_files ();
  init_header_files ();

  processing_acc_compilation = 1;

  /* In a coff file, we've already installed the minimal symbols that came
     from the coff (non-stab) symbol table, so always act like an
     incremental load here. */
  if (stabsects->next == NULL)
    {
      stabsize = bfd_section_size (sym_bfd, stabsects->section);
      DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile);
      DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
    }
  else
    {
      struct stab_section_list *stabsect;

      DBX_SYMCOUNT (objfile) = 0;
      for (stabsect = stabsects; stabsect != NULL; stabsect = stabsect->next)
	{
	  stabsize = bfd_section_size (sym_bfd, stabsect->section);
	  DBX_SYMCOUNT (objfile) += stabsize / DBX_SYMBOL_SIZE (objfile);
	}

      DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;

      symbuf_sections = stabsects->next;
      symbuf_left = bfd_section_size (sym_bfd, stabsects->section);
      symbuf_read = 0;
    }

  dbx_symfile_read (objfile, 0);
}

/* Scan and build partial symbols for an ELF symbol file.
   This ELF file has already been processed to get its minimal symbols,
   and any DWARF symbols that were in it.

   This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
   rolled into one.

   OBJFILE is the object file we are reading symbols from.
   ADDR is the address relative to which the symbols are (e.g.
   the base address of the text segment).
   MAINLINE is true if we are reading the main symbol
   table (as opposed to a shared lib or dynamically loaded file).
   STABOFFSET and STABSIZE define the location in OBJFILE where the .stab
   section exists.
   STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
   .stabstr section exists.

   This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
   adjusted for elf details. */

void
elfstab_build_psymtabs (struct objfile *objfile, int mainline,
			file_ptr staboffset, unsigned int stabsize,
			file_ptr stabstroffset, unsigned int stabstrsize)
{
  int val;
  bfd *sym_bfd = objfile->obfd;
  char *name = bfd_get_filename (sym_bfd);
  struct dbx_symfile_info *info;

  /* There is already a dbx_symfile_info allocated by our caller.
     It might even contain some info from the ELF symtab to help us.  */
  info = objfile->sym_stab_info;

  /* Find the first and last text address.  dbx_symfile_read seems to
     want this.  */
  find_text_range (sym_bfd, objfile);

#define	ELF_STABS_SYMBOL_SIZE	12	/* XXX FIXME XXX */
  DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE;
  DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile);
  DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
  DBX_SYMTAB_OFFSET (objfile) = staboffset;

  if (stabstrsize > bfd_get_size (sym_bfd))
    error ("ridiculous string table size: %d bytes", stabstrsize);
  DBX_STRINGTAB (objfile) = (char *)
    obstack_alloc (&objfile->psymbol_obstack, stabstrsize + 1);
  OBJSTAT (objfile, sz_strtab += stabstrsize + 1);

  /* Now read in the string table in one big gulp.  */

  val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
  if (val < 0)
    perror_with_name (name);
  val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
  if (val != stabstrsize)
    perror_with_name (name);

  stabsread_new_init ();
  buildsym_new_init ();
  free_header_files ();
  init_header_files ();
  install_minimal_symbols (objfile);

  processing_acc_compilation = 1;

  /* In an elf file, we've already installed the minimal symbols that came
     from the elf (non-stab) symbol table, so always act like an
     incremental load here. */
  dbx_symfile_read (objfile, 0);
}

/* Scan and build partial symbols for a file with special sections for stabs
   and stabstrings.  The file has already been processed to get its minimal
   symbols, and any other symbols that might be necessary to resolve GSYMs.

   This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
   rolled into one.

   OBJFILE is the object file we are reading symbols from.
   ADDR is the address relative to which the symbols are (e.g. the base address
   of the text segment).
   MAINLINE is true if we are reading the main symbol table (as opposed to a
   shared lib or dynamically loaded file).
   STAB_NAME is the name of the section that contains the stabs.
   STABSTR_NAME is the name of the section that contains the stab strings.

   This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */

void
stabsect_build_psymtabs (struct objfile *objfile, int mainline, char *stab_name,
			 char *stabstr_name, char *text_name)
{
  int val;
  bfd *sym_bfd = objfile->obfd;
  char *name = bfd_get_filename (sym_bfd);
  asection *stabsect;
  asection *stabstrsect;
  asection *text_sect;

  stabsect = bfd_get_section_by_name (sym_bfd, stab_name);
  stabstrsect = bfd_get_section_by_name (sym_bfd, stabstr_name);

  if (!stabsect)
    return;

  if (!stabstrsect)
    error ("stabsect_build_psymtabs:  Found stabs (%s), but not string section (%s)",
	   stab_name, stabstr_name);

  objfile->sym_stab_info = (struct dbx_symfile_info *)
    xmalloc (sizeof (struct dbx_symfile_info));
  memset (objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));

  text_sect = bfd_get_section_by_name (sym_bfd, text_name);
  if (!text_sect)
    error ("Can't find %s section in symbol file", text_name);
  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) = sizeof (struct external_nlist);
  DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect)
    / DBX_SYMBOL_SIZE (objfile);
  DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stabstrsect);
  DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos;	/* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */

  if (DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
    error ("ridiculous string table size: %d bytes", DBX_STRINGTAB_SIZE (objfile));
  DBX_STRINGTAB (objfile) = (char *)
    obstack_alloc (&objfile->psymbol_obstack, DBX_STRINGTAB_SIZE (objfile) + 1);
  OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile) + 1);

  /* Now read in the string table in one big gulp.  */

  val = bfd_get_section_contents (sym_bfd,	/* bfd */
				  stabstrsect,	/* bfd section */
				  DBX_STRINGTAB (objfile),	/* input buffer */
				  0,	/* offset into section */
				  DBX_STRINGTAB_SIZE (objfile));	/* amount to read */

  if (!val)
    perror_with_name (name);

  stabsread_new_init ();
  buildsym_new_init ();
  free_header_files ();
  init_header_files ();
  install_minimal_symbols (objfile);

  /* Now, do an incremental load */

  processing_acc_compilation = 1;
  dbx_symfile_read (objfile, 0);
}

static struct sym_fns aout_sym_fns =
{
  bfd_target_aout_flavour,
  dbx_new_init,			/* sym_new_init: init anything gbl to entire symtab */
  dbx_symfile_init,		/* sym_init: read initial info, setup for sym_read() */
  dbx_symfile_read,		/* sym_read: read a symbol file into symtab */
  dbx_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_dbxread (void)
{
  add_symtab_fns (&aout_sym_fns);
}