aboutsummaryrefslogtreecommitdiff
path: root/gdb/mipsread.c
blob: 07e1a7c74d4c3628148b1b51f787eed9f729e412 (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
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
/* Read a symbol table in MIPS' format (Third-Eye).
   Copyright (C) 1986, 1987, 1989-1991 Free Software Foundation, Inc.
   Contributed by Alessandro Forin (af@cs.cmu.edu) at CMU

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., 675 Mass Ave, Cambridge, MA 02139, USA.  */

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

   mipscoff_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.  mipscoff_psymtab_to_symtab() is called indirectly through
   a pointer in the psymtab to do this.  */

#include <stdio.h>
#include "defs.h"
#include "symtab.h"
#include "gdbcore.h"
#include "symfile.h"
#include "obstack.h"
#include <sys/param.h>
#include <sys/file.h>
#include <sys/stat.h>
#ifdef	CMUCS
#include <mips/syms.h>
#else /* not CMUCS */
#include <symconst.h>
#include <sym.h>
#endif /* not CMUCS */

#include "coff-mips.h"

struct coff_exec {
	struct external_filehdr f;
	struct external_aouthdr a;
};

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

   For mipsread this structure contains the index of the FDR that this psymtab
   represents and a pointer to the symbol table header HDRR from the symbol
   file that the psymtab was created from.  */

#define FDR_IDX(p) (((struct symloc *)((p)->read_symtab_private))->fdr_idx)
#define CUR_HDR(p) (((struct symloc *)((p)->read_symtab_private))->cur_hdr)

struct symloc {
  int fdr_idx;
  HDRR *cur_hdr;
};

/* Things we import explicitly from other modules */

extern int	     info_verbose;
extern struct block *block_for_pc();
extern void	     sort_symtab_syms();

/* Various complaints about symbol reading that don't abort the process */
   
struct complaint unknown_ext_complaint = 
	{"unknown external symbol %s", 0, 0};

struct complaint unknown_sym_complaint = 
	{"unknown local symbol %s", 0, 0};

struct complaint unknown_st_complaint = 
	{"with type %d", 0, 0};

struct complaint block_overflow_complaint = 
	{"block containing %s overfilled", 0, 0};

struct complaint basic_type_complaint = 
	{"cannot map MIPS basic type 0x%x", 0, 0};

struct complaint unknown_type_qual_complaint = 
	{"unknown type qualifier 0x%x", 0, 0};

struct complaint array_bitsize_complaint = 
	{"size of array target type not known, assuming %d bits", 0, 0};

struct complaint array_parse_complaint = 
	{"array type with strange relative symbol", 0, 0};

/* Macros and extra defs */

/* Already-parsed symbols are marked specially */

#define stParsed stType

/* Puns: hard to find whether -g was used and how */

#define MIN_GLEVEL GLEVEL_0
#define compare_glevel(a,b)					\
	(((a) == GLEVEL_3) ? ((b) < GLEVEL_3) :			\
	 ((b) == GLEVEL_3) ? -1 : (int)((b) - (a)))

/* When looking at .o files, avoid tripping over bad addresses */

#define SAFE_TEXT_ADDR 0x400000
#define SAFE_DATA_ADDR 0x10000000

#define UNSAFE_DATA_ADDR(p)	((unsigned)p < SAFE_DATA_ADDR || (unsigned)p > 2*SAFE_DATA_ADDR)

/* Things that really are local to this module */

/* GDB symtable for the current compilation unit */

static struct symtab *cur_stab;

/* MIPS symtab header for the current file */

static HDRR	*cur_hdr;

/* Pointer to current file decriptor record, and its index */

static FDR	*cur_fdr;
static int	 cur_fd;

/* Index of current symbol */

static int	 cur_sdx;

/* Note how much "debuggable" this image is.  We would like
   to see at least one FDR with full symbols */

static max_gdbinfo;
static max_glevel;

/* When examining .o files, report on undefined symbols */

static int n_undef_symbols, n_undef_labels, n_undef_vars, n_undef_procs;

/* Extra builtin types */

struct type *builtin_type_complex;
struct type *builtin_type_double_complex;
struct type *builtin_type_fixed_dec;
struct type *builtin_type_float_dec;
struct type *builtin_type_string;

/* Template types */

static struct type *builtin_type_ptr;
static struct type *builtin_type_struct;
static struct type *builtin_type_union;
static struct type *builtin_type_enum;
static struct type *builtin_type_range;
static struct type *builtin_type_set;

/* Forward declarations */

static struct symbol	*new_symbol();
static struct type	*new_type();
static struct field	*new_field();
static struct block	*new_block();
static struct symtab	*new_symtab();
static struct linetable	*new_linetable();
static struct blockvector *new_bvect();

static struct type	*parse_type();
static struct type	*make_type();
static struct symbol	*mylookup_symbol();
static struct block	*shrink_block();

static int compare_symtabs();
static int compare_psymtabs();
static int compare_blocks();

static struct partial_symtab *new_psymtab();
static struct partial_symtab *parse_fdr();
static int compare_psymbols();

static void psymtab_to_symtab_1();
static void add_block();
static void add_symbol();
static int  add_line();
static void reorder_symtabs();
static void reorder_psymtabs();
static void shrink_linetable();

/* Things we export to other modules */

/* Address bounds for the signal trampoline in inferior, if any */
/* FIXME:  Nothing really seems to use this.  Why is it here? */

CORE_ADDR sigtramp_address, sigtramp_end;

/* The entry point (starting address) of the file, if it is an executable.  */

extern CORE_ADDR startup_file_start;	/* From blockframe.c */
extern CORE_ADDR startup_file_end;	/* From blockframe.c */

void
mipscoff_new_init()
{
  /* If we have a file symbol header lying around, blow it away.  */
  if (cur_hdr)
    free ((char *)cur_hdr);
  cur_hdr = 0;
}

void
mipscoff_symfile_init (sf)
     struct sym_fns *sf;
{
  sf->sym_private = NULL;
}

void
mipscoff_symfile_read(sf, addr, mainline)
     struct sym_fns *sf;
     CORE_ADDR addr;
     int mainline;
{
  struct coff_symfile_info *info = (struct coff_symfile_info *)sf->sym_private;
  bfd *abfd = sf->objfile->obfd;
  char *name = bfd_get_filename (abfd);
  int desc;
  register int val;
  int symtab_offset;
  int stringtab_offset;

  /* Initialize a variable that we couldn't do at _initialize_ time. */
  builtin_type_ptr = lookup_pointer_type (builtin_type_void);

/* WARNING WILL ROBINSON!  ACCESSING BFD-PRIVATE DATA HERE!  FIXME!  */
   desc = fileno ((FILE *)(abfd->iostream));	/* Raw file descriptor */
/* End of warning */

  /* Position to read the symbol table.  */
  val = lseek (desc, (long)symtab_offset, 0);
  if (val < 0)
    perror_with_name (name);

  init_misc_bunches ();
  make_cleanup (discard_misc_bunches, 0);

  /* Now that the executable file is positioned at symbol table,
     process it and define symbols accordingly.  */

  read_mips_symtab(sf->objfile, desc);

  /* Go over the misc symbol bunches and install them in vector.  */

  condense_misc_bunches (!mainline);
}
  
/* Exported procedure: Allocate zeroed memory */

char *
xzalloc(size)
{
	char           *p = xmalloc(size);

	bzero(p, size);
	return p;
}

/* Exported procedure: Builds a symtab from the PST partial one.
   Restores the environment in effect when PST was created, delegates
   most of the work to an ancillary procedure, and sorts
   and reorders the symtab list at the end */

static void
mipscoff_psymtab_to_symtab(pst)
	struct partial_symtab *pst;
{
	struct symtab  *ret;
	int             i;

	if (!pst)
		return;

	if (info_verbose) {
		printf_filtered("Reading in symbols for %s...", pst->filename);
		fflush(stdout);
	}
	/* Restore the header and list of pending typedefs */
	cur_hdr = CUR_HDR(pst);

	psymtab_to_symtab_1(pst, pst->filename);

	reorder_symtabs();

	if (info_verbose)
		printf_filtered("done.\n");
}

/* Exported procedure: Is PC in the signal trampoline code */

int
in_sigtramp(pc, name)
	CORE_ADDR pc;
	char *name;
{
	if (sigtramp_address == 0)
		fixup_sigtramp();
	return (pc >= sigtramp_address && pc < sigtramp_end);
}

/* File-level interface functions */

/* Read the symtab information from file FSYM into memory.  Also,
   return address just past end of our text segment in *END_OF_TEXT_SEGP.  */

static
read_the_mips_symtab(abfd, fsym, end_of_text_segp)
	bfd 		*abfd;
	int		fsym;
	CORE_ADDR	*end_of_text_segp;
{
	int             stsize, st_hdrsize;
	unsigned        st_filptr;
	HDRR            st_hdr;
	/* Header for executable/object file we read symbols from */
	struct coff_exec filhdr;

	/* We get here with DESC pointing to the symtab header. But we need
	 * other info from the initial headers */
	lseek(fsym, 0L, 0);
	myread(fsym, &filhdr, sizeof filhdr);

	if (end_of_text_segp)
		*end_of_text_segp =
			bfd_h_get_32 (abfd, filhdr.a.text_start) +
			bfd_h_get_32 (abfd, filhdr.a.tsize);

	/* Find and read the symbol table header */
	st_hdrsize = bfd_h_get_32 (abfd, filhdr.f.f_nsyms);
	st_filptr  = bfd_h_get_32 (abfd, filhdr.f.f_symptr);
	if (st_filptr == 0)
		return 0;

	lseek(fsym, st_filptr, L_SET);
	if (st_hdrsize > sizeof (st_hdr))	/* Profanity check */
		abort();
	if (read(fsym, &st_hdr, st_hdrsize) != st_hdrsize)
		goto readerr;

	/* Find out how large the symbol table is */
	stsize = (st_hdr.cbExtOffset - (st_filptr + st_hdrsize))
		+ st_hdr.iextMax * cbEXTR;

	/* Allocate space for the symbol table.  Read it in.  */
	cur_hdr = (HDRR *) xmalloc(stsize + st_hdrsize);

	bcopy(&st_hdr, cur_hdr, st_hdrsize);
	if (read(fsym, (char *) cur_hdr + st_hdrsize, stsize) != stsize)
		goto readerr;

	/* Fixup file_pointers in it */
	fixup_symtab(cur_hdr, (char *) cur_hdr + st_hdrsize,
		     st_filptr + st_hdrsize);

	return;
readerr:
	error("Short read on %s", bfd_get_filename (abfd));
}


/* Turn all file-relative pointers in the symtab described by HDR
   into memory pointers, given that the symtab itself is located
   at DATA in memory and F_PTR in the file. */

static
fixup_symtab( hdr, data, f_ptr)
	HDRR *hdr;
	char *data;
{
	int             f_idx, s_idx;
	FDR            *fh;
	SYMR	       *sh;
	OPTR	       *op;
	PDR	       *pr;
	EXTR	       *esh;

	/*
	 * These fields are useless (and empty) by now:
	 *	hdr->cbDnOffset, hdr->cbOptOffset
	 * We use them for other internal purposes.
	 */
	hdr->cbDnOffset = 0;
	hdr->cbOptOffset = 0;

#define FIX(off) \
        if (hdr->off) hdr->off = (unsigned int)data + (hdr->off - f_ptr);

        FIX(cbLineOffset);
        FIX(cbPdOffset);
        FIX(cbSymOffset);
        FIX(cbOptOffset);
        FIX(cbAuxOffset);
        FIX(cbSsOffset);
        FIX(cbSsExtOffset);
        FIX(cbFdOffset);
        FIX(cbRfdOffset);
        FIX(cbExtOffset);
#undef	FIX


	/*
	 * Fix all string pointers inside the symtab, and
	 * the FDR records.  Also fix other miscellany.
	 */
	for (f_idx = 0; f_idx < hdr->ifdMax; f_idx++) {
		register unsigned code_offset;

		/* Header itself, and strings */
		fh = (FDR *) (hdr->cbFdOffset) + f_idx;
		fh->issBase += hdr->cbSsOffset;
		if (fh->rss != -1)
			fh->rss = (long)fh->rss + fh->issBase;
		for (s_idx = 0; s_idx < fh->csym; s_idx++) {
			sh = (SYMR*)(hdr->cbSymOffset) + fh->isymBase + s_idx;
			sh->iss = (long) sh->iss + fh->issBase;
			sh->reserved = 0;
		}

		cur_fd = f_idx;

		/* Local symbols */
		fh->isymBase = (int)((SYMR*)(hdr->cbSymOffset)+fh->isymBase);

		/* cannot fix fh->ipdFirst because it is a short */
#define IPDFIRST(h,fh) \
		((long)h->cbPdOffset + fh->ipdFirst * sizeof(PDR))

		/* Optional symbols (actually used for partial_symtabs) */
		fh->ioptBase = 0;
		fh->copt = 0;

		/* Aux symbols */
		if (fh->caux)
			fh->iauxBase = hdr->cbAuxOffset + fh->iauxBase * sizeof(AUXU);
		/* Relative file descriptor table */
		fh->rfdBase = hdr->cbRfdOffset + fh->rfdBase * sizeof(RFDT);

		/* Line numbers */
		if (fh->cbLine)
			fh->cbLineOffset += hdr->cbLineOffset;

		/* Procedure symbols.  (XXX This should be done later) */
		code_offset = fh->adr;
		for (s_idx = 0; s_idx < fh->cpd; s_idx++) {
			unsigned name, only_ext;

			pr = (PDR*)(IPDFIRST(hdr,fh)) + s_idx;

			/* Simple rule to find files linked "-x" */
			only_ext = fh->rss == -1;
			if (only_ext) {
				if (pr->isym == -1) {
					/* static function */
					sh = (SYMR*)-1;
				} else {
					/* external */
					name = hdr->cbExtOffset + pr->isym * sizeof(EXTR);
					sh = &((EXTR*)name)->asym;
				}
			} else {
				/* Full symbols */
				sh = (SYMR*)fh->isymBase + pr->isym;
				/* Included code ? */
				if (s_idx == 0 && pr->adr != 0)
					code_offset -= pr->adr;
			}

			/* Turn index into a pointer */
			pr->isym = (long)sh;

			/* Fix line numbers */
			pr->cbLineOffset += fh->cbLineOffset;

			/* Relocate address */
			if (!only_ext)
				pr->adr += code_offset;
		}		
	}

	/* External symbols: fix string */
	for (s_idx = 0; s_idx < hdr->iextMax; s_idx++) {
		esh = (EXTR*)(hdr->cbExtOffset) + s_idx;
		esh->asym.iss = esh->asym.iss + hdr->cbSsExtOffset;
	}
}


/* Find a file descriptor given its index RF relative to a file CF */

static FDR *
get_rfd (cf, rf)
	int cf, rf;
{
	register FDR   *f;

	f = (FDR *) (cur_hdr->cbFdOffset) + cf;
	/* Object files do not have the RFD table, all refs are absolute */
	if (f->rfdBase == 0)
		return (FDR *) (cur_hdr->cbFdOffset) + rf;
	cf = *((pRFDT) f->rfdBase + rf);
	return (FDR *) (cur_hdr->cbFdOffset) + cf;
}

/* Return a safer print NAME for a file descriptor */

static char *
fdr_name(name)
	char *name;
{
	if (name == (char *) -1)
		return "<stripped file>";
	if (UNSAFE_DATA_ADDR(name))
		return "<NFY>";
	return name;
}


/* Read in and parse the symtab of the file DESC. INCREMENTAL says
   whether we are adding to the general symtab or not. 
   FIXME:  INCREMENTAL is currently always zero, though it should not be. */

static
read_mips_symtab (objfile, desc)
	struct objfile *objfile;
	int desc;
{
	CORE_ADDR end_of_text_seg;

	read_the_mips_symtab(objfile->obfd, desc, &end_of_text_seg);

	parse_partial_symbols(end_of_text_seg, objfile);

	/*
	 * Check to make sure file was compiled with -g.
	 * If not, warn the user of this limitation.
	 */
	if (compare_glevel(max_glevel, GLEVEL_2) < 0) {
		if (max_gdbinfo == 0)
			printf (
"\n%s not compiled with -g, debugging support is limited.\n",
				objfile->name);
		printf(
"You should compile with -g2 or -g3 for best debugging support.\n");
		fflush(stdout);
	}
}

/* Local utilities */

/* Map of FDR indexes to partial symtabs */

static struct pst_map {
	struct partial_symtab *pst;	/* the psymtab proper */
	int n_globals;			/* globals it exports */
	int n_statics;			/* statics (locals) it contains */
} * fdr_to_pst;


/* Utility stack, used to nest procedures and blocks properly.
   It is a doubly linked list, to avoid too many alloc/free.
   Since we might need it quite a few times it is NOT deallocated
   after use. */

static struct parse_stack {
	struct parse_stack	*next, *prev;
	struct symtab		*cur_st;	/* Current symtab */
	struct block		*cur_block;	/* Block in it */
	int			 blocktype;	/* What are we parsing */
	int			 maxsyms;	/* Max symbols in this block */
	struct type		*cur_type;	/* Type we parse fields for */
	int			 procadr;	/* Start addres of this procedure */
	int			 numargs;	/* Its argument count */
} *top_stack;	/* Top stack ptr */


/* Enter a new lexical context */

static push_parse_stack()
{
	struct parse_stack *new;

	/* Reuse frames if possible */
	if (top_stack && top_stack->prev)
		new = top_stack->prev;
	else
		new = (struct parse_stack *) xzalloc(sizeof(struct parse_stack));
	/* Initialize new frame with previous content */
	if (top_stack) {
		register struct parse_stack *prev = new->prev;

		*new = *top_stack;
		top_stack->prev = new;
		new->prev = prev;
		new->next = top_stack;
	}
	top_stack = new;
}

/* Exit a lexical context */

static pop_parse_stack()
{
	if (!top_stack)
		return;
	if (top_stack->next)
		top_stack = top_stack->next;
}


/* Cross-references might be to things we haven't looked at
   yet, e.g. type references.  To avoid too many type
   duplications we keep a quick fixup table, an array
   of lists of references indexed by file descriptor */

static struct pending {
	struct pending	*next;		/* link */
	SYMR		*s;		/* the symbol */
	struct type	*t;		/* its partial type descriptor */
} **pending_list;


/* Check whether we already saw symbol SH in file FH as undefined */

static
struct pending *is_pending_symbol(fh, sh)
	FDR *fh;
	SYMR *sh;
{
	int             f_idx = fh - (FDR *) cur_hdr->cbFdOffset;
	register struct pending *p;

	/* Linear search is ok, list is typically no more than 10 deep */
	for (p = pending_list[f_idx]; p; p = p->next)
		if (p->s == sh)
			break;
	return p;
}

/* Check whether we already saw type T in file FH as undefined */

static
struct pending *is_pending_type(fh, t)
	FDR *fh;
	struct type *t;
{
	int             f_idx = fh - (FDR *) cur_hdr->cbFdOffset;
	register struct pending *p;

	for (p = pending_list[f_idx]; p; p = p->next)
		if (p->t == t)
			break;
	return p;
}

/* Add a new undef symbol SH of type T */

static
add_pending(fh, sh, t)
	FDR *fh;
	SYMR *sh;
	struct type *t;
{
	int             f_idx = fh - (FDR *) cur_hdr->cbFdOffset;
	struct pending *p = is_pending_symbol(fh, sh);

	/* Make sure we do not make duplicates */
	if (!p) {
		p = (struct pending *) xmalloc(sizeof(*p));
		p->s = sh;
		p->t = t;
		p->next = pending_list[f_idx];
		pending_list[f_idx] = p;
	}
	sh->reserved = 1;	/* for quick check */
}

/* Throw away undef entries when done with file index F_IDX */

static
free_pending(f_idx)
{
	register struct pending *p, *q;

	for (p = pending_list[f_idx]; p; p = q) {
		q = p->next;
		free(p);
	}
	pending_list[f_idx] = 0;
}

/* The number of args to a procedure is not explicit in the symtab,
   this is the list of all those we know of.
   This makes parsing more reasonable and avoids extra passes */

static struct numarg {
	struct numarg	*next;		/* link */
	unsigned	 adr;		/* procedure's start address */
	unsigned	 num;		/* arg count */
} *numargs_list;

/* Record that the procedure at ADR takes NUM arguments. */

static
got_numargs(adr,num)
{
	struct numarg  *n = (struct numarg *) xmalloc(sizeof(struct numarg));

	n->adr = adr;
	n->num = num;
	n->next = numargs_list;
	numargs_list = n;
}

/* See if we know how many arguments the procedure at ADR takes */

static
lookup_numargs(adr)
{
	struct numarg  *n = numargs_list;

	while (n && n->adr != adr)
		n = n->next;
	return (n) ? n->num : -1;
}

/* Release storage when done with this file */

static void
free_numargs()
{
	struct numarg  *n = numargs_list, *m;

	while (n) {
		m = n->next;
		free(n);
		n = m;
	}
	numargs_list = 0;
}


/* Parsing Routines proper. */

/* Parse a single symbol. Mostly just make up a GDB symbol for it.
   For blocks, procedures and types we open a new lexical context.
   This is basically just a big switch on the symbol's type */

static void
parse_symbol(sh, ax)
	SYMR *sh;
	AUXU *ax;
{
	struct symbol  *s;
	struct block   *b;
	struct type    *t;
	struct field   *f;
	/* When a symbol is cross-referenced from other files/symbols
	   we mark it explicitly */
	int             pend = (sh->reserved == 1);
	enum address_class class;

	switch (sh->st) {

	    case stNil:
		break;

	    case stGlobal:	/* external symbol, goes into global block */
		class = LOC_STATIC;
		b = BLOCKVECTOR_BLOCK(BLOCKVECTOR(top_stack->cur_st),
				      GLOBAL_BLOCK);
		s = new_symbol(sh->iss);
		SYMBOL_VALUE_ADDRESS(s) = (CORE_ADDR)sh->value;
		goto data;

	    case stStatic:	/* static data, goes into current block. */
		class = LOC_STATIC;
		b = top_stack->cur_block;
		s = new_symbol(sh->iss);
		SYMBOL_VALUE_ADDRESS(s) = (CORE_ADDR)sh->value;
		goto data;

	    case stLocal:	/* local variable, goes into current block */
		if (sh->sc == scRegister) {
			class = LOC_REGISTER;
			if (sh->value > 31)
				sh->value += 6;
		} else
			class = LOC_LOCAL;
		b = top_stack->cur_block;
		s = new_symbol(sh->iss);
		SYMBOL_VALUE(s) = sh->value;

data:		/* Common code for symbols describing data */
		SYMBOL_NAMESPACE(s) = VAR_NAMESPACE;
		SYMBOL_CLASS(s) = class;
		add_symbol(s, b);

		/* Type could be missing in a number of cases */
		if (sh->sc == scUndefined || sh->sc == scNil ||
		    sh->index == 0xfffff)
			SYMBOL_TYPE(s) = builtin_type_int;	/* undefined? */
		else
			SYMBOL_TYPE(s) = parse_type(ax + sh->index, sh, 0);
		/* Value of a data symbol is its memory address */
		break;

	    case stParam:	/* arg to procedure, goes into current block */
		max_gdbinfo++;
		top_stack->numargs++;
		s = new_symbol(sh->iss);
		SYMBOL_NAMESPACE(s) = VAR_NAMESPACE;
		if (sh->sc == scRegister) {
			SYMBOL_CLASS(s) = LOC_REGPARM;
			if (sh->value > 31)
				sh->value += 6;
		} else
			SYMBOL_CLASS(s) = LOC_ARG;
		SYMBOL_VALUE(s) = sh->value;
		SYMBOL_TYPE(s) = parse_type(ax + sh->index, sh, 0);
		add_symbol(s, top_stack->cur_block);
#if 0
		/* FIXME:  This has not been tested.  See dbxread.c */
		/* Add the type of this parameter to the function/procedure
		   type of this block. */
		add_param_to_type(&top_stack->cur_block->function->type,s);
#endif
		break;

	    case stLabel:	/* label, goes into current block */
		s = new_symbol(sh->iss);
		SYMBOL_NAMESPACE(s) = VAR_NAMESPACE;	/* so that it can be used */
		SYMBOL_CLASS(s) = LOC_LABEL;		/* but not misused */
		SYMBOL_VALUE_ADDRESS(s) = (CORE_ADDR)sh->value;
		SYMBOL_TYPE(s) = builtin_type_int;
		add_symbol(s, top_stack->cur_block);
		break;

	    case stProc:	/* Procedure, usually goes into global block */
	    case stStaticProc:	/* Static procedure, goes into current block */
		s = new_symbol(sh->iss);
		SYMBOL_NAMESPACE(s) = VAR_NAMESPACE;
		SYMBOL_CLASS(s) = LOC_BLOCK;
		/* Type of the return value */
		if (sh->sc == scUndefined || sh->sc == scNil)
			t = builtin_type_int;
		else
			t = parse_type(ax + sh->index, sh, 0);
		b = top_stack->cur_block;
		if (sh->st == stProc) {
		    struct blockvector *bv = BLOCKVECTOR(top_stack->cur_st);
		    /* The next test should normally be true,
		       but provides a hook for nested functions
		       (which we don't want to make global). */
		    if (b == BLOCKVECTOR_BLOCK(bv, STATIC_BLOCK))
			b = BLOCKVECTOR_BLOCK(bv, GLOBAL_BLOCK);
		}
		add_symbol(s, b);

		/* Make a type for the procedure itself */
#if 0
		/* FIXME:  This has not been tested yet!  See dbxread.c */
		/* Generate a template for the type of this function.  The 
		   types of the arguments will be added as we read the symbol 
		   table. */
		bcopy(SYMBOL_TYPE(s),lookup_function_type(t),sizeof(struct type));
#else
		SYMBOL_TYPE(s) = lookup_function_type (t);
#endif

		/* Create and enter a new lexical context */
		b = new_block(top_stack->maxsyms);
		SYMBOL_BLOCK_VALUE(s) = b;
		BLOCK_FUNCTION(b) = s;
		BLOCK_START(b) = BLOCK_END(b) = sh->value;
		BLOCK_SUPERBLOCK(b) = top_stack->cur_block;
		add_block(b, top_stack->cur_st);

		/* Not if we only have partial info */
		if (sh->sc == scUndefined || sh->sc == scNil)
			break;

		push_parse_stack();
		top_stack->cur_block = b;
		top_stack->blocktype = sh->st;
		top_stack->cur_type = SYMBOL_TYPE(s);
		top_stack->procadr = sh->value;
		top_stack->numargs = 0;

		sh->value = (long) SYMBOL_TYPE(s);
		break;

	    case stBlock:	/* Either a lexical block, or some type */
		push_parse_stack();
		top_stack->blocktype = stBlock;
		if (sh->sc == scInfo) {	/* structure/union/enum def */
			s = new_symbol(sh->iss);
			SYMBOL_NAMESPACE(s) = STRUCT_NAMESPACE;
			SYMBOL_CLASS(s) = LOC_TYPEDEF;
			SYMBOL_VALUE(s) = 0;
			add_symbol(s, top_stack->cur_block);
			/* If this type was expected, use its partial definition */
			if (pend) {
				t = is_pending_symbol(cur_fdr, sh)->t;
			} else {
				/* Uhmm, can`t decide yet. Smash later */
				t = new_type(sh->iss);
				TYPE_CODE(t) = TYPE_CODE_UNDEF;
				add_pending(cur_fdr, sh, t);
			}
			SYMBOL_TYPE(s) = t;
			/* make this the current type */
			top_stack->cur_type = t;
			TYPE_LENGTH(t) = sh->value;
			/* Mark that symbol has a type, and say which one */
			sh->value = (long) t;
		} else {
			/* beginnning of (code) block. Value of symbol
			   is the displacement from procedure start */
			b = new_block(top_stack->maxsyms);
			BLOCK_START(b) = sh->value + top_stack->procadr;
			BLOCK_SUPERBLOCK(b) = top_stack->cur_block;
			top_stack->cur_block = b;
			add_block(b, top_stack->cur_st);
		}
		break;

	    case stEnd:		/* end (of anything) */
		if (sh->sc == scInfo) {
			/* Finished with type */
			top_stack->cur_type = 0;
		} else if (sh->sc == scText &&
			   (top_stack->blocktype == stProc ||
			    top_stack->blocktype == stStaticProc)) {
		    /* Finished with procedure */
		    struct blockvector *bv = BLOCKVECTOR(top_stack->cur_st);
		    struct block *b;
		    int i;

		    BLOCK_END(top_stack->cur_block) += sh->value; /* size */
		    got_numargs(top_stack->procadr, top_stack->numargs);
		    /* Reallocate symbols, saving memory */
		    b = shrink_block(top_stack->cur_block, top_stack->cur_st);

		    /* f77 emits proc-level with address bounds==[0,0],
		       So look for such child blocks, and patch them.  */
		    for (i = 0; i < BLOCKVECTOR_NBLOCKS(bv); i++) {
			struct block *b_bad = BLOCKVECTOR_BLOCK(bv,i);
			if (BLOCK_SUPERBLOCK(b_bad) == b
			 && BLOCK_START(b_bad) == top_stack->procadr
			 && BLOCK_END(b_bad) == top_stack->procadr) {
			    BLOCK_START(b_bad) = BLOCK_START(b);
			    BLOCK_END(b_bad) = BLOCK_END(b);
			}
		    }
		    if (entry_point < BLOCK_END(b)
		      && entry_point >= BLOCK_START(b)) {
			startup_file_start = BLOCK_START(b);
			startup_file_end = BLOCK_END(b);
		    }
		} else if (sh->sc == scText && top_stack->blocktype == stBlock) {
			/* End of (code) block. The value of the symbol
			   is the displacement from the procedure`s start
			   address of the end of this block. */
			BLOCK_END(top_stack->cur_block) = sh->value + top_stack->procadr;
			(void) shrink_block(top_stack->cur_block, top_stack->cur_st);
		}
		pop_parse_stack();	/* restore previous lexical context */
		break;

	    case stMember:	/* member of struct/union/enum.. */
		f = new_field(top_stack->cur_type, sh->iss);
		f->bitpos = sh->value;
		f->type = parse_type(ax + sh->index, sh, &f->bitsize);
		break;

	    case stTypedef:	/* type definition */
		s = new_symbol(sh->iss);
		SYMBOL_NAMESPACE(s) = VAR_NAMESPACE;
		SYMBOL_CLASS(s) = LOC_TYPEDEF;
		SYMBOL_BLOCK_VALUE(s) = top_stack->cur_block;
		add_symbol(s, top_stack->cur_block);			
		SYMBOL_TYPE(s) = parse_type(ax + sh->index, sh, 0);
		sh->value = (long) SYMBOL_TYPE(s);
		break;

	    case stFile:	/* file name */
		push_parse_stack();
		top_stack->blocktype = sh->st;
		break;

		/* I`ve never seen these for C */
	    case stRegReloc:
		break;		/* register relocation */
	    case stForward:
		break;		/* forwarding address */
	    case stConstant:
		break;		/* constant */
	    default:
		error("Unknown symbol type %x.", sh->st);
	}
	sh->st = stParsed;
}

/* Parse the type information provided in the AX entries for
   the symbol SH. Return the bitfield size in BS, in case. */

static struct type *parse_type(ax, sh, bs)
	AUXU	*ax;
	SYMR	*sh;
	int	*bs;
{
	/* Null entries in this map are treated specially */
	static struct type **map_bt[] =
	{
		 &builtin_type_void,		/* btNil */
		 0,				/* btAdr */
		 &builtin_type_char,		/* btChar */
		 &builtin_type_unsigned_char,	/* btUChar */
		 &builtin_type_short,		/* btShort */
		 &builtin_type_unsigned_short,	/* btUShort */
		 &builtin_type_int,		/* btInt */
		 &builtin_type_unsigned_int,	/* btUInt */
		 &builtin_type_long,		/* btLong */
		 &builtin_type_unsigned_long,	/* btULong */
		 &builtin_type_float,		/* btFloat */
		 &builtin_type_double,		/* btDouble */
		 0,				/* btStruct */
		 0,				/* btUnion */
		 0,				/* btEnum */
		 0,				/* btTypedef */
		 0,				/* btRange */
		 0,				/* btSet */
		 &builtin_type_complex,		/* btComplex */
		 &builtin_type_double_complex,	/* btDComplex */
		 0,				/* btIndirect */
		 &builtin_type_fixed_dec,	/* btFixedDec */
		 &builtin_type_float_dec,	/* btFloatDec */
		 &builtin_type_string,		/* btString */
		 0,				/* btBit */
		 0,				/* btPicture */
		 &builtin_type_void,		/* btVoid */
	};

	TIR            *t;
	struct type    *tp = 0, *tp1;
	char           *fmt = "%s";

	/* Procedures start off by one */
	if (sh->st == stProc || sh->st == stStaticProc)
		ax++;

	/* Undefined ? Should not happen */
	if (ax->rndx.rfd == 0xfff) {
		return builtin_type_void;
	}

	/* Use aux as a type information record, map its basic type */
	t = &ax->ti;
	if (t->bt > 26 || t->bt == btPicture) {
		complain (&basic_type_complaint, t->bt);
		return builtin_type_int;
	}
	if (map_bt[t->bt])
		tp = *map_bt[t->bt];
	else {
		/* Cannot use builtin types, use templates */
		tp = make_type(TYPE_CODE_VOID, 0, 0, 0);
		switch (t->bt) {
		    case btAdr:
			*tp = *builtin_type_ptr;
			break;
		    case btStruct:
			*tp = *builtin_type_struct;
			fmt = "struct %s";
			break;
		    case btUnion:
			*tp = *builtin_type_union;
			fmt = "union %s";
			break;
		    case btEnum:
			*tp = *builtin_type_enum;
			fmt = "enum %s";
			break;
		    case btRange:
			*tp = *builtin_type_range;
			break;
		    case btSet:
			*tp = *builtin_type_set;
			fmt = "set %s";
			break;
		}
	}

	/* Move on to next aux */
	ax++;
	if (t->continued) {
		/* This is the way it would work if the compiler worked */
		register TIR *t1 = t;
		while (t1->continued)
			ax++;
	}

	/* For bitfields all we need is the width */
	if (t->fBitfield) {
		*bs = ax->width;
		return tp;
	}

	/* All these types really point to some (common) MIPS type
	   definition, and only the type-qualifiers fully identify
	   them.  We`ll make the same effort at sharing */
	if (t->bt == btIndirect ||
	    t->bt == btStruct ||
	    t->bt == btUnion ||
	    t->bt == btEnum ||
	    t->bt == btTypedef ||
	    t->bt == btRange ||
	    t->bt == btSet) {
		char            name[256], *pn;

		/* Try to cross reference this type */
		tp1 = tp;
		ax += cross_ref(ax, &tp1, &pn);
		/* SOMEONE OUGHT TO FIX DBXREAD TO DROP "STRUCT" */
		sprintf(name, fmt, pn);

		/* reading .o file ? */
		if (UNSAFE_DATA_ADDR(tp1))
			tp1 = tp;
		if (TYPE_CODE(tp1) == TYPE_CODE_UNDEF) {
			/*
			 * Type was incompletely defined, now we know.
			 */
			TYPE_CODE(tp1) = TYPE_CODE(tp);
			TYPE_NAME(tp1) = obsavestring(name, strlen(name));
			if (TYPE_CODE(tp1) == TYPE_CODE_ENUM) {
				int             i;

				for (i = 0; i < TYPE_NFIELDS(tp1); i++)
					make_enum_constant(&TYPE_FIELD(tp1,i), tp1);
			}
		}
		if (tp1 != tp) {
			/* found as cross ref, rid of our template */
			if ((TYPE_FLAGS(tp) & TYPE_FLAG_PERM) == 0)
				free(tp);
			tp = tp1;
			/* stupid idea of prepending "struct" to type names */
			if (t->bt == btStruct && !index(TYPE_NAME(tp), ' ')) {
				sprintf(name, fmt, TYPE_NAME(tp));
				TYPE_NAME(tp) = obsavestring(name, strlen(name));
			}
		} else
			TYPE_NAME(tp) = savestring(name, strlen(name));
	}

	/* Deal with range types */
	if (t->bt == btRange) {
		struct field   *f;

		f = new_field(tp, "Low");
		f->bitpos = ax->dnLow;
		ax++;
		f = new_field(tp, "High");
		f->bitpos = ax->dnHigh;
		ax++;
	}

	/* Parse all the type qualifiers now. If there are more
	   than 6 the game will continue in the next aux */

#define PARSE_TQ(tq) \
	if (t->tq != tqNil) ax += upgrade_type(&tp, t->tq, ax, sh);

again:	PARSE_TQ(tq0);
	PARSE_TQ(tq1);
	PARSE_TQ(tq2);
	PARSE_TQ(tq3);
	PARSE_TQ(tq4);
	PARSE_TQ(tq5);
#undef	PARSE_TQ

	if (t->continued) {
		t++;
		goto again;
	}
	return tp;
}

/* Make up a complex type from a basic one.  Type is passed by
   reference in TPP and side-effected as necessary. The type
   qualifier TQ says how to handle the aux symbols at AX for
   the symbol SX we are currently analyzing.
   Returns the number of aux symbols we parsed. */

static int
upgrade_type(tpp, tq, ax, sh)
	struct type   **tpp;
	AUXU	       *ax;
	SYMR	       *sh;
{
	int             off;
	struct type    *t;

	/* Used in array processing */
	int             rf, id;
	FDR            *fh;
	struct field   *f;
	SYMR            ss;
	int		lower, upper;

	switch (tq) {
	case tqPtr:
		t = lookup_pointer_type (*tpp);
		*tpp = t;
		return 0;

	case tqProc:
		t = lookup_function_type (*tpp);
		*tpp = t;
		return 0;

	case tqArray:
		off = 0;
		t = make_type(TYPE_CODE_ARRAY, 0, 0, 0);
		TYPE_TARGET_TYPE(t) = *tpp;

		/* Determine and record the domain type (type of index) */
		id = ax->rndx.index;
		rf = ax->rndx.rfd;
		if (rf == 0xfff) {
			rf = (++ax)->isym;
			off++;
		}
		fh = get_rfd(cur_fd, rf);
		f = new_field(t, (char *)0);
		bzero(&ss, sizeof ss);
/* XXX */	f->type = parse_type(fh->iauxBase + id * sizeof(AUXU),
				     &ss, &f->bitsize);

		if (off == 0) {
		/*
		 * This seems to be a pointer to the end of the Block defining
		 * the type.  Why it is here is magic for me, and I have no
		 * good use for it anyways.
		 */
			/* This used to occur because cross_ref returned
			   the wrong result (ax pointed wrong).  FIXME,
			   delete this code in a while.  -- gnu@cygnus jul91 */
			complain (&array_parse_complaint, 0);
			off++;
			id = (++ax)->rndx.index;
			if ((rf = ax->rndx.rfd) == 0xfff)
				rf = (++ax)->isym, off++;
		}
		lower = (++ax)->dnLow;
		upper = (++ax)->dnHigh;
		rf = (++ax)->width;	/* bit size of array element */

		/* Check whether supplied array element bit size matches
		   the known size of the element type.  If this complaint
		   ends up not happening, we can remove this code.  It's
		   here because we aren't sure we understand this *&%&$
		   symbol format.  */
		id = TYPE_LENGTH(TYPE_TARGET_TYPE(t)) << 3; /* bitsize */
		if (id == 0) {
			/* Most likely an undefined type */
			id = rf;
			TYPE_LENGTH(TYPE_TARGET_TYPE(t)) = id >> 3;
		}
		if (id != rf)
			complain (&array_bitsize_complaint, rf);

		TYPE_LENGTH(t) = (upper < 0) ? 0 :
			(upper - lower + 1) * (rf >> 3);
		*tpp = t;
		return 4 + off;

	case tqVol:
		/* Volatile -- currently ignored */
		return 0;

	default:
		complain (&unknown_type_qual_complaint, tq);
		return 0;
	}
}


/* Parse a procedure descriptor record PR.  Note that the procedure
   is parsed _after_ the local symbols, now we just make up the
   extra information we need into a special symbol that we insert
   in the procedure's main block.  Note also that images that
   have been partially stripped (ld -x) have been deprived
   of local symbols, and we have to cope with them here.
   The procedure's code ends at BOUND */

static
parse_procedure(pr, bound)
	PDR *pr;
{
	struct symbol *s, *i;
	SYMR *sh = (SYMR*)pr->isym;
	struct block *b;
	struct mips_extra_func_info *e;
	char name[100];
	char *sh_name;

	/* Reuse the MIPS record */
	e = (struct mips_extra_func_info *) pr;
	e->numargs = lookup_numargs(pr->adr);

	/* Make up our special symbol */
	i = new_symbol(".gdbinfo.");
	SYMBOL_VALUE(i) = (int)e;
	SYMBOL_NAMESPACE(i) = LABEL_NAMESPACE;
	SYMBOL_CLASS(i) = LOC_CONST;
	SYMBOL_TYPE(i) = builtin_type_void;

	/* Make up a name for static procedures. Sigh. */
	if (sh == (SYMR*)-1) {
	    sprintf(name,".static_procedure@%x",pr->adr);
	    sh_name = savestring(name, strlen(name));
	    s = NULL;
	}
	else {
	    sh_name = (char*)sh->iss;
	    s = mylookup_symbol(sh_name, top_stack->cur_block,
				VAR_NAMESPACE, LOC_BLOCK);
	}
	if (s != 0) {
		b = SYMBOL_BLOCK_VALUE(s);
	} else {
		s = new_symbol(sh_name);
		SYMBOL_NAMESPACE(s) = VAR_NAMESPACE;
		SYMBOL_CLASS(s) = LOC_BLOCK;
		/* Donno its type, hope int is ok */
		SYMBOL_TYPE(s) = lookup_function_type (builtin_type_int);
		add_symbol(s, top_stack->cur_block);
		/* Wont have symbols for this one */
		b = new_block(2);
		SYMBOL_BLOCK_VALUE(s) = b;
		BLOCK_FUNCTION(b) = s;
		BLOCK_START(b) = pr->adr;
		BLOCK_END(b) = bound;
		BLOCK_SUPERBLOCK(b) = top_stack->cur_block;
		add_block(b, top_stack->cur_st);
	}
	e->isym = (long)s;
	add_symbol(i,b);
}

/* Parse the external symbol ES. Just call parse_symbol() after
   making sure we know where the aux are for it. For procedures,
   parsing of the PDRs has already provided all the needed
   information, we only parse them if SKIP_PROCEDURES is false,
   and only if this causes no symbol duplication.

   This routine clobbers top_stack->cur_block and ->cur_st. */

static
parse_external(es, skip_procedures)
	EXTR *es;
{
	AUXU *ax;

	if (es->ifd != ifdNil) {
		cur_fd = es->ifd;
		cur_fdr = (FDR*)(cur_hdr->cbFdOffset) + cur_fd;
		ax = (AUXU*)cur_fdr->iauxBase;
	} else {
		cur_fdr = (FDR*)(cur_hdr->cbFdOffset);
		ax = 0;
	}
	top_stack->cur_st = cur_stab;
	top_stack->cur_block = BLOCKVECTOR_BLOCK(BLOCKVECTOR(top_stack->cur_st),
						 GLOBAL_BLOCK);

	/* Reading .o files */
	if (es->asym.sc == scUndefined || es->asym.sc == scNil) {
		char *what;
		switch (es->asym.st) {
		case stStaticProc:
		case stProc:	what = "procedure"; n_undef_procs++;  break;
		case stGlobal:	what = "variable";  n_undef_vars++;   break;
		case stLabel:	what = "label";     n_undef_labels++; break;
		default :	what = "symbol";                      break;
		}
		n_undef_symbols++;
		if (info_verbose)
			printf_filtered("Warning: %s `%s' is undefined (in %s)\n", what,
				es->asym.iss, fdr_name(cur_fdr->rss));
		return;
	}

	switch (es->asym.st) {
	case stProc:
		/* If we have full symbols we do not need more */
		if (skip_procedures)
			return;
		if (mylookup_symbol (es->asym.iss, top_stack->cur_block,
					VAR_NAMESPACE, LOC_BLOCK))
			break;
		/* fall through */
	case stGlobal:
	case stLabel:
		/*
		 * Note that the case of a symbol with indexNil
		 * must be handled anyways by parse_symbol().
		 */
		parse_symbol(&es->asym, ax);
		break;
	default:
		break;
	}
}

/* Parse the line number info for file descriptor FH into
   GDB's linetable LT.  MIPS' encoding requires a little bit
   of magic to get things out.  Note also that MIPS' line
   numbers can go back and forth, apparently we can live
   with that and do not need to reorder our linetables */

static
parse_lines(fh, lt)
	FDR *fh;
	struct linetable *lt;
{
	unsigned char *base = (unsigned char*)fh->cbLineOffset;
	int i, j, k;
	int delta, count, lineno = 0;
	PDR *pr;

	if (base == 0)
		return;

	/* Scan by procedure descriptors */
	i = 0; j = 0, k = 0;
	for (pr = (PDR*)IPDFIRST(cur_hdr,fh); j < fh->cpd; j++, pr++) {
		int l, halt;

		/* No code for this one */
		if (pr->iline == ilineNil ||
		    pr->lnLow == -1 || pr->lnHigh == -1)
			continue;
		/*
		 *	Aurgh! To know where to stop expanding we
		 *	must look-ahead.
		 */
		for (l = 1; l < (fh->cpd - j); l++)
			if (pr[l].iline != -1)
				break;
		if (l == (fh->cpd - j))
			halt = fh->cline;
		else
			halt = pr[l].iline;
		/*
		 * When procedures are moved around the linenumbers
		 * are attributed to the next procedure up
		 */
		if (pr->iline >= halt) continue;

		base = (unsigned char*)pr->cbLineOffset;
		l = pr->adr >> 2;	/* in words */
		halt += (pr->adr >> 2) - pr->iline;
		for (lineno = pr->lnLow; l < halt;) {
			count = *base & 0x0f;
			delta = *base++ >> 4;
			if (delta >= 8)
				delta -= 16;
			if (delta == -8) {
				delta = (base[0] << 8) | base[1];
				if (delta >= 0x8000)
					delta -= 0x10000;
				base += 2;
			}
			lineno += delta;/* first delta is 0 */
			k = add_line(lt, lineno, l, k);
			l += count + 1;
		}
	}
}


/* Parse the symbols of the file described by FH, whose index is F_IDX.
   BOUND is the highest core address of this file's procedures */

static
parse_one_file(fh, f_idx, bound)
	FDR *fh;
{
	register int s_idx;
	SYMR *sh;
	PDR *pr;

	/* Parse local symbols first */

	for (s_idx = 0; s_idx < fh->csym; s_idx++) {
		sh = (SYMR *) (fh->isymBase) + s_idx;
		cur_sdx = s_idx;
		parse_symbol(sh, fh->iauxBase);
	}

	/* Procedures next, note we need to look-ahead to
	   find out where the procedure's code ends */

	for (s_idx = 0; s_idx < fh->cpd-1; s_idx++) {
		pr = (PDR *) (IPDFIRST(cur_hdr, fh)) + s_idx;
		parse_procedure(pr, pr[1].adr);	/* next proc up */
	}
	if (fh->cpd) {
		pr = (PDR *) (IPDFIRST(cur_hdr, fh)) + s_idx;
		parse_procedure(pr, bound);	/* next file up */
	}

	/* Linenumbers. At the end, check if we can save memory */
	parse_lines(fh, LINETABLE(cur_stab));
	if (LINETABLE(cur_stab)->nitems < fh->cline)
		shrink_linetable(cur_stab);
}

/* Master parsing procedure for first-pass reading of file symbols
   into a partial_symtab.

   Parses the symtab described by the global symbolic header CUR_HDR.
   END_OF_TEXT_SEG gives the address just after the text segment for
   the symtab we are reading.  */

static
parse_partial_symbols(end_of_text_seg, objfile)
	int end_of_text_seg;
	struct objfile *objfile;
{
	int             f_idx, s_idx, h_max, stat_idx;
	HDRR		*hdr;
	/* Running pointers */
	FDR		*fh;
	RFDT		*rh;
	register EXTR	*esh;
	register SYMR	*sh;
	struct partial_symtab *pst;

	/*
	 * Big plan: 
	 *
	 * Only parse the Local and External symbols, and the Relative FDR.
	 * Fixup enough of the loader symtab to be able to use it.
	 * Allocate space only for the file's portions we need to
	 * look at. (XXX)
	 */

	hdr = cur_hdr;
	max_gdbinfo = 0;
	max_glevel = MIN_GLEVEL;

	/* Allocate the map FDR -> PST.
	   Minor hack: -O3 images might claim some global data belongs
	   to FDR -1. We`ll go along with that */
	fdr_to_pst = (struct pst_map *)xzalloc((hdr->ifdMax+1) * sizeof *fdr_to_pst);
	fdr_to_pst++;
	{
		struct partial_symtab * pst = new_psymtab("", objfile);
		fdr_to_pst[-1].pst = pst;
		FDR_IDX(pst) = -1;
	}

	/* Now scan the FDRs, mostly for dependencies */
	for (f_idx = 0; f_idx < hdr->ifdMax; f_idx++)
		(void) parse_fdr(f_idx, 1, objfile);

	/* Take a good guess at how many symbols we might ever need */
	h_max = hdr->iextMax;

	/* Parse externals: two passes because they can be ordered
	   in any way, but gdb likes to have them segregated by their
	   source file.  */

	/* Pass 1 over external syms: Presize and partition the list */
	for (s_idx = 0; s_idx < hdr->iextMax; s_idx++) {
		esh = (EXTR *) (hdr->cbExtOffset) + s_idx;
		fdr_to_pst[esh->ifd].n_globals++;
	}

	if (global_psymbols.list) {
		int origsize = global_psymbols.next - global_psymbols.list;

		global_psymbols.list = (struct partial_symbol *)
			xrealloc (global_psymbols.list,
			   (h_max + origsize) * sizeof(struct partial_symbol));
		global_psymbols.next = global_psymbols.list + origsize;
		global_psymbols.size = h_max + origsize;
	} else {
		global_psymbols.list = (struct partial_symbol *)
				xmalloc (h_max * sizeof(struct partial_symbol));
		global_psymbols.next = global_psymbols.list;
		global_psymbols.size = h_max;
	}

	/* Pass 1.5 over files:  partition out global symbol space */
	s_idx    = global_psymbols.next - global_psymbols.list;
	for (f_idx = -1; f_idx < hdr->ifdMax; f_idx++) {
		fdr_to_pst[f_idx].pst->globals_offset = s_idx;
		s_idx += fdr_to_pst[f_idx].n_globals;
	}

	/* Pass 1.6 over files:  partition out static symbol space.
	   Note that this loop starts at 0, not at -1. */
	stat_idx = static_psymbols.next - static_psymbols.list;
	for (f_idx = 0; f_idx < hdr->ifdMax; f_idx++) {
		fdr_to_pst[f_idx].pst->statics_offset = stat_idx;
		fh = f_idx + (FDR *)(hdr->cbFdOffset);
		stat_idx += fh->csym;
	}

	/* Now that we know its max size, allocate static symbol list */
	if (static_psymbols.list) {
		int origsize = static_psymbols.next - static_psymbols.list;

		static_psymbols.list = (struct partial_symbol *)
			xrealloc (static_psymbols.list,
			   stat_idx * sizeof(struct partial_symbol));
		static_psymbols.next = static_psymbols.list + origsize;
		static_psymbols.size = stat_idx;
	} else {
		static_psymbols.list = (struct partial_symbol *)
			xmalloc (stat_idx * sizeof(struct partial_symbol));
		static_psymbols.next = static_psymbols.list;
		static_psymbols.size = stat_idx;
	}

	/* Pass 2 over external syms: fill in external symbols */
	for (s_idx = 0; s_idx < hdr->iextMax; s_idx++) {
		register struct partial_symbol *p;
		enum misc_function_type misc_type = mf_text;
		esh = (EXTR *) (hdr->cbExtOffset) + s_idx;

		if (esh->asym.sc == scUndefined || esh->asym.sc == scNil)
			continue;

		/* Locate the psymtab and the preallocated psymbol.  */
		pst = fdr_to_pst[esh->ifd].pst;
		p = global_psymbols.list + pst->globals_offset +
			 pst->n_global_syms++;
		SYMBOL_NAME(p) = (char *)(esh->asym.iss);
		SYMBOL_NAMESPACE(p) = VAR_NAMESPACE;

		switch (esh->asym.st) {
		case stProc:
			SYMBOL_CLASS(p) = LOC_BLOCK;
			SYMBOL_VALUE(p) = esh->asym.value;
			break;
		case stGlobal:
			SYMBOL_CLASS(p) = LOC_STATIC;
			SYMBOL_VALUE_ADDRESS(p) = (CORE_ADDR)esh->asym.value;
			misc_type = mf_data;
			break;
		case stLabel:
			SYMBOL_CLASS(p) = LOC_LABEL;
			SYMBOL_VALUE_ADDRESS(p) = (CORE_ADDR)esh->asym.value;
			break;
		default:
			misc_type = mf_unknown;
			complain (&unknown_ext_complaint, SYMBOL_NAME(p));
		}
		prim_record_misc_function (SYMBOL_NAME(p),
				           SYMBOL_VALUE(p),
				           misc_type);
	}

	/* Pass 3 over files, over local syms: fill in static symbols */
	for (f_idx = 0; f_idx < hdr->ifdMax; f_idx++) {
		fh = f_idx + (FDR *)(cur_hdr->cbFdOffset);
		pst = fdr_to_pst[f_idx].pst;
		pst->texthigh = pst->textlow;
		
		for (s_idx = 0; s_idx < fh->csym; ) {
			register struct partial_symbol *p;

			sh = s_idx + (SYMR *) fh->isymBase;

			if (sh->sc == scUndefined || sh->sc == scNil ||
			    sh->index == 0xfffff) {
				/* FIXME, premature? */
				s_idx++;
				continue;
			}

			/* Locate the preallocated psymbol.  */
			p = static_psymbols.list + pst->statics_offset +
				 pst->n_static_syms;
			SYMBOL_NAME(p) = (char *)(sh->iss);
			SYMBOL_VALUE(p) = sh->value;
			SYMBOL_NAMESPACE(p) = VAR_NAMESPACE;

			switch (sh->st) {
			case stProc:		/* Asm labels apparently */
			case stStaticProc:		/* Function */
				SYMBOL_CLASS(p) = LOC_BLOCK;
				pst->n_static_syms++;	/* Use gdb symbol */
				/* Skip over procedure to next one. */
				s_idx = (sh->index + (AUXU *)fh->iauxBase)
					  ->isym;
					{
					long high;
					long procaddr = sh->value;

					sh = s_idx + (SYMR *) fh->isymBase - 1;
					if (sh->st != stEnd)
						continue;
					high = procaddr + sh->value;
					if (high > pst->texthigh)
						pst->texthigh = high;
					}
				continue;
			case stStatic:			/* Variable */
				SYMBOL_CLASS(p) = LOC_STATIC;
				SYMBOL_VALUE_ADDRESS(p) = (CORE_ADDR)sh->value;
				break;
			case stTypedef:			/* Typedef */
				SYMBOL_CLASS(p) = LOC_TYPEDEF;
				break;
			case stConstant:		/* Constant decl */
				SYMBOL_CLASS(p) = LOC_CONST;
				break;
			case stBlock:			/* { }, str, un, enum*/
				if (sh->sc == scInfo) {
                                      SYMBOL_NAMESPACE(p) = STRUCT_NAMESPACE;
                                      SYMBOL_CLASS(p) = LOC_TYPEDEF;
                                      pst->n_static_syms++;
				}
				/* Skip over the block */
				s_idx = sh->index;
				continue;
			case stFile:			/* File headers */
			case stLabel:			/* Labels */
			case stEnd:			/* Ends of files */
				goto skip;
			default:
				complain (&unknown_sym_complaint, SYMBOL_NAME(p));
				complain (&unknown_st_complaint, sh->st);
				s_idx++;
				continue;
			}
			pst->n_static_syms++;	/* Use this gdb symbol */
		skip:
			s_idx++;		/* Go to next file symbol */
#if 0
/* We don't usually record static syms, but some we seem to.  chk dbxread. */
/*FIXME*/		prim_record_misc_function (SYMBOL_NAME(p),
						   SYMBOL_VALUE(p),
						   misc_type);
#endif
		}
	}

	/* The array (of lists) of globals must be sorted. */
	reorder_psymtabs();

	/* Now sort the global psymbols.  */
	for (f_idx = 0; f_idx < hdr->ifdMax; f_idx++) {
		struct partial_symtab *pst = fdr_to_pst[f_idx].pst;
		if (pst->n_global_syms > 1)
			qsort (global_psymbols.list + pst->globals_offset,
				pst->n_global_syms, sizeof (struct partial_symbol),
				compare_psymbols);
	}

	/* Mark the last code address, and remember it for later */
	hdr->cbDnOffset = end_of_text_seg;

	free(&fdr_to_pst[-1]);
	fdr_to_pst = 0;
}


/* Do the initial analisys of the F_IDX-th file descriptor.
   Allocates a partial symtab for it, and builds the list
   of dependent files by recursion. LEV says at which level
   of recursion we are called (to pretty up debug traces) */

static struct partial_symtab *
parse_fdr(f_idx, lev, objfile)
	int f_idx;
	int lev;
	struct objfile *objfile;
{
	register FDR *fh;
	register struct partial_symtab *pst;
	int s_idx, s_id0;

	fh = (FDR *) (cur_hdr->cbFdOffset) + f_idx;

	/* Use this to indicate into which symtab this file was parsed */
	if (fh->ioptBase)
		return (struct partial_symtab *) fh->ioptBase;

	/* Debuggability level */
	if (compare_glevel(max_glevel, fh->glevel) < 0)
		max_glevel = fh->glevel;

	/* Make a new partial_symtab */
	pst = new_psymtab(fh->rss, objfile);
	if (fh->cpd == 0){
		pst->textlow = 0;
		pst->texthigh = 0;
	} else {
		pst->textlow = fh->adr;
		pst->texthigh = fh->cpd;	/* To be fixed later */
	}

	/* Make everything point to everything. */
	FDR_IDX(pst) = f_idx;
	fdr_to_pst[f_idx].pst = pst;
	fh->ioptBase = (int)pst;

	/* Analyze its dependencies */
	if (fh->crfd <= 1)
		return pst;

	s_id0 = 0;
	if (fh->cpd == 0) {  /* If there are no functions defined here ... */
		/* ...then presumably a .h file: drop reverse depends .h->.c */
		for (; s_id0 < fh->crfd; s_id0++) {
			RFDT *rh = (RFDT *) (fh->rfdBase) + s_id0;
			if (*rh == f_idx) {
				s_id0++;	/* Skip self-dependency */
				break;
			}
		}
	}
	pst->number_of_dependencies = fh->crfd - s_id0;
	pst->dependencies = (struct partial_symtab **)
		obstack_alloc (psymbol_obstack,
				 pst->number_of_dependencies *
				   sizeof (struct partial_symtab *));
	for (s_idx = s_id0; s_idx < fh->crfd; s_idx++) {
		RFDT *rh = (RFDT *) (fh->rfdBase) + s_idx;

		pst->dependencies[s_idx-s_id0] = parse_fdr(*rh, lev+1, objfile);
	}

	return pst;
}


/* Ancillary function to psymtab_to_symtab().  Does all the work
   for turning the partial symtab PST into a symtab, recurring
   first on all dependent psymtabs.  The argument FILENAME is
   only passed so we can see in debug stack traces what file
   is being read. */

static void
psymtab_to_symtab_1(pst, filename)
	struct partial_symtab *pst;
	char *filename;
{
	int             i, f_max;
	struct symtab  *st;
	FDR *fh;

	if (pst->readin)
		return;
	pst->readin = 1;

	pending_list = (struct pending **) cur_hdr->cbOptOffset;
	if (pending_list == 0) {
		pending_list = (struct pending **)
			xzalloc(cur_hdr->ifdMax * sizeof(struct pending *));
		cur_hdr->cbOptOffset = (int)pending_list;
	}

	/* How many symbols will we need */
	/* FIXME, this does not count enum values. */
	f_max = pst->n_global_syms + pst->n_static_syms;
	if (FDR_IDX(pst) == -1) {
		fh = 0;
		st = new_symtab ("unknown", f_max, 0, pst->objfile);
	} else {
		fh = (FDR *) (cur_hdr->cbFdOffset) + FDR_IDX(pst);
		f_max += fh->csym + fh->cpd;
		st = new_symtab (pst->filename, 2 * f_max, 2 * fh->cline,
				 pst->objfile);
	}

	/* Read in all partial symbtabs on which this one is dependent.
	   NOTE that we do have circular dependencies, sigh.  We solved
	   that by setting pst->readin before this point.  */

	for (i = 0; i < pst->number_of_dependencies; i++)
		if (!pst->dependencies[i]->readin) {
			/* Inform about additional files to be read in.  */
			if (info_verbose)
			  {
			    fputs_filtered (" ", stdout);
			    wrap_here ("");
			    fputs_filtered ("and ", stdout);
			    wrap_here ("");
			    printf_filtered ("%s...",
					     pst->dependencies[i]->filename);
			    wrap_here ("");		/* Flush output */
			    fflush (stdout);
			  }
			/* We only pass the filename for debug purposes */
			psymtab_to_symtab_1(pst->dependencies[i], 
				pst->dependencies[i]->filename);
		}

	/* Now read the symbols for this symtab */

	cur_fd = FDR_IDX(pst);
	cur_fdr = fh;
	cur_stab = st;

	/* Get a new lexical context */

	push_parse_stack();
	top_stack->cur_st = cur_stab;
	top_stack->cur_block = BLOCKVECTOR_BLOCK(BLOCKVECTOR(cur_stab),
						 STATIC_BLOCK);
	BLOCK_START(top_stack->cur_block) = fh ? fh->adr : 0;
	BLOCK_END(top_stack->cur_block) = 0;
	top_stack->blocktype = stFile;
	top_stack->maxsyms = 2*f_max;
	top_stack->cur_type = 0;
	top_stack->procadr = 0;
	top_stack->numargs = 0;

	/* Parse locals and procedures */
	if (fh)
		parse_one_file(fh, cur_fd, (cur_fd == (cur_hdr->ifdMax - 1)) ?
				cur_hdr->cbDnOffset : fh[1].adr);

	/* .. and our share of externals.
	   XXX use the global list to speed up things here. how ? 
	   FIXME, Maybe quit once we have found the right number of ext's? */
	/* parse_external clobbers top_stack->cur_block and ->cur_st here. */
	top_stack->blocktype = stFile;
	top_stack->maxsyms = cur_hdr->isymMax + cur_hdr->ipdMax + cur_hdr->iextMax;
	for (i = 0; i < cur_hdr->iextMax; i++) {
		register EXTR *esh = (EXTR *) (cur_hdr->cbExtOffset) + i;
		if (esh->ifd == cur_fd)
			parse_external(esh, 1);
	}

	/* If there are undefined, tell the user */
	if (n_undef_symbols) {
		printf_filtered("File %s contains %d unresolved references:",
				st->filename, n_undef_symbols);
		printf_filtered("\n\t%4d variables\n\t%4d procedures\n\t%4d labels\n",
				n_undef_vars, n_undef_procs, n_undef_labels);
		n_undef_symbols = n_undef_labels = n_undef_vars = n_undef_procs = 0;
	}

	pop_parse_stack();

	/*
	 * Sort the symbol table now, we are done adding symbols to it.
	 */
	sort_symtab_syms(st);

	/* Now link the psymtab and the symtab.  */
	pst->symtab = st;
}

/* Ancillary parsing procedures. */

/* Lookup the type at relative index RN.  Return it in TPP
   if found and in any event come up with its name PNAME.
   Return value says how many aux symbols we ate */

static
cross_ref(rn, tpp, pname)
	RNDXR *rn;
	struct type **tpp;
	char **pname;
{
	unsigned        rf;

	/* Escape index means 'the next one' */
	if (rn->rfd == 0xfff)
		rf = *(unsigned *) (rn + 1);
	else
		rf = rn->rfd;

	if (rf == -1) {
		/* Ooops */
		*pname = "<undefined>";
	} else {
		/*
		 * Find the relative file descriptor and the symbol in it 
		 */
		FDR            *fh = get_rfd(cur_fd, rf);
		SYMR           *sh;
		struct type    *t;

		/*
		 * If we have processed this symbol then we left a forwarding
		 * pointer to the corresponding GDB symbol.  If not, we`ll put
		 * it in a list of pending symbols, to be processed later when
		 * the file f will be.  In any event, we collect the name for
		 * the type here. Which is why we made a first pass at
		 * strings. 
		 */
		sh = (SYMR *) (fh->isymBase) + rn->index;

		/* Careful, we might be looking at .o files */
		*pname = (UNSAFE_DATA_ADDR(sh->iss)) ? "<undefined>" :
			(char *) sh->iss;

		/* Have we parsed it ? */
		if ((!UNSAFE_DATA_ADDR(sh->value)) && (sh->st == stParsed)) {
			t = (struct type *) sh->value;
			*tpp = t;
		} else {
			struct pending *p;

			/* Avoid duplicates */
			p = is_pending_symbol(fh, sh);

			if (p)
				*tpp = p->t;
			else
				add_pending(fh, sh, *tpp);
		}
	}

	/* We used one auxent normally, two if we got a "next one" rf. */
	return (rn->rfd == 0xfff? 2: 1);
}


/* Quick&dirty lookup procedure, to avoid the MI ones that require
   keeping the symtab sorted */

static struct symbol *
mylookup_symbol (name, block, namespace, class)
     char *name;
     register struct block *block;
     enum namespace namespace;
     enum address_class class;
{
	register int    bot, top, inc;
	register struct symbol *sym;

	bot = 0;
	top = BLOCK_NSYMS(block);
	inc = name[0];
	while (bot < top) {
		sym = BLOCK_SYM(block, bot);
		if (SYMBOL_NAME(sym)[0] == inc
		    && SYMBOL_NAMESPACE(sym) == namespace
		    && SYMBOL_CLASS(sym) == class
		    && !strcmp(SYMBOL_NAME(sym), name))
			return sym;
		bot++;
	}
	if (block = BLOCK_SUPERBLOCK (block))
		return mylookup_symbol (name, block, namespace, class);
	return 0;
}


/* Add a new symbol S to a block B.
   Infrequently, we will need to reallocate the block to make it bigger.
   We only detect this case when adding to top_stack->cur_block, since
   that's the only time we know how big the block is.  FIXME.  */

static void
add_symbol(s,b)
	struct symbol *s;
	struct block *b;
{
	int nsyms = BLOCK_NSYMS(b)++;
	struct block *origb;
	struct parse_stack *stackp;

	if (b == top_stack->cur_block &&
	    nsyms >= top_stack->maxsyms) {
		complain (&block_overflow_complaint, s->name);
		/* In this case shrink_block is actually grow_block, since
		   BLOCK_NSYMS(b) is larger than its current size.  */
		origb = b;
		b = shrink_block (top_stack->cur_block, top_stack->cur_st);

		/* Now run through the stack replacing pointers to the
		   original block.  shrink_block has already done this
		   for the blockvector and BLOCK_FUNCTION.  */
		for (stackp = top_stack; stackp; stackp = stackp->next) {
			if (stackp->cur_block == origb) {
				stackp->cur_block = b;
				stackp->maxsyms = BLOCK_NSYMS (b);
			}
		}
	}
	BLOCK_SYM(b,nsyms) = s;
}

/* Add a new block B to a symtab S */

static void
add_block(b,s)
	struct block *b;
	struct symtab *s;
{
	struct blockvector *bv = BLOCKVECTOR(s);

	bv = (struct blockvector *)xrealloc(bv, sizeof(struct blockvector) +
					    BLOCKVECTOR_NBLOCKS(bv) * sizeof(bv->block));
	if (bv != BLOCKVECTOR(s))
		BLOCKVECTOR(s) = bv;

	BLOCKVECTOR_BLOCK(bv, BLOCKVECTOR_NBLOCKS(bv)++) = b;
}

/* Add a new linenumber entry (LINENO,ADR) to a linevector LT.
   MIPS' linenumber encoding might need more than one byte
   to describe it, LAST is used to detect these continuation lines */

static int
add_line(lt, lineno, adr, last)
	struct linetable *lt;
	int lineno;
	CORE_ADDR adr;
	int last;
{
	if (last == 0)
		last = -2;	/* make sure we record first line */

	if (last == lineno)	/* skip continuation lines */
		return lineno;

	lt->item[lt->nitems].line = lineno;
	lt->item[lt->nitems++].pc = adr << 2;
	return lineno;
}



/* Comparison functions, used when sorting things */

/*  Symtabs must be ordered viz the code segments they cover */

static int
compare_symtabs( s1, s2)
	struct symtab **s1, **s2;
{
	/* "most specific" first */

	register struct block *b1, *b2;
	b1 = BLOCKVECTOR_BLOCK(BLOCKVECTOR(*s1),GLOBAL_BLOCK);
	b2 = BLOCKVECTOR_BLOCK(BLOCKVECTOR(*s2),GLOBAL_BLOCK);
	if (BLOCK_END(b1) == BLOCK_END(b2))
		return BLOCK_START(b1) - BLOCK_START(b2);
	return BLOCK_END(b1) - BLOCK_END(b2);
}


/*  Partial Symtabs, same */

static int
compare_psymtabs( s1, s2)
	struct partial_symtab **s1, **s2;
{
	/* Perf twist: put the ones with no code at the end */

	register int a = (*s1)->textlow;
	register int b = (*s2)->textlow;
	if (a == 0)
		return b;
	if (b == 0)
		return -a;
	return a - b;
}


/* Partial symbols are compared lexicog by their print names */

static int
compare_psymbols (s1, s2)
	register struct partial_symbol *s1, *s2;
{
	register char
	               *st1 = SYMBOL_NAME(s1),
	               *st2 = SYMBOL_NAME(s2);

	return (st1[0] - st2[0] ? st1[0] - st2[0] :
		strcmp(st1 + 1, st2 + 1));
}

/* Blocks with a smaller low bound should come first */

static int compare_blocks(b1,b2)
	struct block **b1, **b2;
{
	register int addr_diff;

	addr_diff = (BLOCK_START((*b1))) - (BLOCK_START((*b2)));
	if (addr_diff == 0)
		return (BLOCK_END((*b1))) - (BLOCK_END((*b2)));
	return addr_diff;
}


/* Sorting and reordering procedures */

/* Sort the blocks of a symtab S.
   Reorder the blocks in the blockvector by code-address,
   as required by some MI search routines */

static void
sort_blocks(s)
	struct symtab *s;
{
	struct blockvector *bv = BLOCKVECTOR(s);

	if (BLOCKVECTOR_NBLOCKS(bv) <= 2) {
		/* Cosmetic */
		if (BLOCK_END(BLOCKVECTOR_BLOCK(bv,GLOBAL_BLOCK)) == 0)
			BLOCK_START(BLOCKVECTOR_BLOCK(bv,GLOBAL_BLOCK)) = 0;
		if (BLOCK_END(BLOCKVECTOR_BLOCK(bv,STATIC_BLOCK)) == 0)
			BLOCK_START(BLOCKVECTOR_BLOCK(bv,STATIC_BLOCK)) = 0;
		return;
	}
	/*
	 * This is very unfortunate: normally all functions are compiled in
	 * the order they are found, but if the file is compiled -O3 things
	 * are very different.  It would be nice to find a reliable test
	 * to detect -O3 images in advance.
	 */
	if (BLOCKVECTOR_NBLOCKS(bv) > 3)
		qsort(&BLOCKVECTOR_BLOCK(bv,FIRST_LOCAL_BLOCK),
		      BLOCKVECTOR_NBLOCKS(bv) - FIRST_LOCAL_BLOCK,
		      sizeof(struct block *),
		      compare_blocks);

	{
		register CORE_ADDR high = 0;
		register int    i, j = BLOCKVECTOR_NBLOCKS(bv);

		for (i = FIRST_LOCAL_BLOCK; i < j; i++)
			if (high < BLOCK_END(BLOCKVECTOR_BLOCK(bv,i)))
				high = BLOCK_END(BLOCKVECTOR_BLOCK(bv,i));
		BLOCK_END(BLOCKVECTOR_BLOCK(bv,GLOBAL_BLOCK)) = high;
	}

	BLOCK_START(BLOCKVECTOR_BLOCK(bv,GLOBAL_BLOCK)) =
		BLOCK_START(BLOCKVECTOR_BLOCK(bv,FIRST_LOCAL_BLOCK));

	BLOCK_START(BLOCKVECTOR_BLOCK(bv,STATIC_BLOCK)) = 
		BLOCK_START(BLOCKVECTOR_BLOCK(bv,GLOBAL_BLOCK));
	BLOCK_END  (BLOCKVECTOR_BLOCK(bv,STATIC_BLOCK)) =
		BLOCK_END  (BLOCKVECTOR_BLOCK(bv,GLOBAL_BLOCK));
}

/* Sort the symtab list, as required by some search procedures.
   We want files ordered to make them look right to users, and for
   searching (see block_for_pc).  */

static void
reorder_symtabs()
{
	register int i;
	struct symtab *stab;
	register struct symtab **all_symtabs;
	register int symtab_count;

	if (!symtab_list)
		return;

	/* Create an array of pointers to all the symtabs.  */
	for (symtab_count = 0, stab = symtab_list;
	     stab;
	     symtab_count++, stab = stab->next) {
		obstack_grow (psymbol_obstack, &stab, sizeof (stab));
		/* FIXME: Only sort blocks for new symtabs ??? */
		sort_blocks(stab);
	}

	all_symtabs = (struct symtab **)
		obstack_base (psymbol_obstack);
	qsort((char *)all_symtabs, symtab_count,
		sizeof(struct symtab *), compare_symtabs);

	/* Re-construct the symtab list, but now it is sorted.  */
	for (i = 0; i < symtab_count-1; i++)
		all_symtabs[i]->next = all_symtabs[i+1];
	all_symtabs[i]->next = 0;
	symtab_list = all_symtabs[0];

	obstack_free (psymbol_obstack, all_symtabs);
}

/* Sort the partial symtab list, as required by some search procedures.
   PC lookups stop at the first psymtab such that textlow <= PC < texthigh */

static void
reorder_psymtabs()
{
	register int i;
	register int all_psymtabs_count;
	struct partial_symtab *pstab;
	struct partial_symtab **all_psymtabs;

	if (!partial_symtab_list)
		return;

	/* Create an array of pointers to all the partial_symtabs.  */

	for (all_psymtabs_count = 0, pstab = partial_symtab_list;
	     pstab;
	     all_psymtabs_count++, pstab = pstab->next)
	  obstack_grow (psymbol_obstack, &pstab, sizeof (pstab));

	all_psymtabs = (struct partial_symtab **)
		 obstack_base (psymbol_obstack);

	qsort((char *)all_psymtabs, all_psymtabs_count,
		sizeof(struct partial_symtab *), compare_psymtabs);

	/* Re-construct the partial_symtab_list, but now it is sorted.  */

	for (i = 0; i < all_psymtabs_count-1; i++)
		all_psymtabs[i]->next = all_psymtabs[i+1];
	all_psymtabs[i]->next = 0;
	partial_symtab_list = all_psymtabs[0];

	obstack_free (psymbol_obstack, all_psymtabs);
}

/* Constructor/restructor/destructor procedures */

/* Allocate a new symtab for NAME.  Needs an estimate of how many symbols
   MAXSYMS and linenumbers MAXLINES we'll put in it */

static
struct symtab *
new_symtab(name, maxsyms, maxlines, objfile)
	char *name;
{
	struct symtab *s = allocate_symtab (name, objfile);

	LINETABLE(s) = new_linetable(maxlines);

	/* All symtabs must have at least two blocks */
	BLOCKVECTOR(s) = new_bvect(2);
	BLOCKVECTOR_BLOCK(BLOCKVECTOR(s), GLOBAL_BLOCK) = new_block(maxsyms);
	BLOCKVECTOR_BLOCK(BLOCKVECTOR(s), STATIC_BLOCK) = new_block(maxsyms);
	BLOCK_SUPERBLOCK( BLOCKVECTOR_BLOCK(BLOCKVECTOR(s),STATIC_BLOCK)) =
		BLOCKVECTOR_BLOCK(BLOCKVECTOR(s), GLOBAL_BLOCK);

	s->free_code = free_linetable;

	/* Link the new symtab into the list of such.  */
	s->next = symtab_list;
	symtab_list = s;

	return s;
}

/* Allocate a new partial_symtab NAME */

static struct partial_symtab *
new_psymtab(name, objfile)
	char *name;
	struct objfile *objfile;
{
	struct partial_symtab *pst;

	pst = (struct partial_symtab *)
	      obstack_alloc (psymbol_obstack, sizeof (*pst));
	bzero (pst, sizeof (*pst));

	if (name == (char*)-1)		/* FIXME -- why not null here? */
		pst->filename = "<no name>";
	else
		pst->filename = name;

	/* Chain it to its object file */
	pst->objfile = objfile;
	pst->objfile_chain = objfile->psymtabs;
	objfile->psymtabs = pst;
	
	pst->next = partial_symtab_list;
	partial_symtab_list = pst;

	/* Keep a backpointer to the file's symbols */
	pst->read_symtab_private = (char *) obstack_alloc (psymbol_obstack,
						  sizeof (struct symloc));
	CUR_HDR(pst) = cur_hdr;

	/* The way to turn this into a symtab is to call... */
	pst->read_symtab = mipscoff_psymtab_to_symtab;

	return pst;
}


/* Allocate a linetable array of the given SIZE */

static
struct linetable *new_linetable(size)
{
	struct linetable *l;

	size = size * sizeof(l->item) + sizeof(struct linetable);
	l = (struct linetable *)xmalloc(size);
	l->nitems = 0;
	return l;
}

/* Oops, too big. Shrink it.  This was important with the 2.4 linetables,
   I am not so sure about the 3.4 ones */

static void
shrink_linetable(s)
	struct symtab *s;
{
	struct linetable *l = new_linetable(LINETABLE(s)->nitems);

	bcopy(LINETABLE(s), l,
	      LINETABLE(s)->nitems * sizeof(l->item) + sizeof(struct linetable));
	free (LINETABLE(s));
	LINETABLE(s) = l;
}

/* Allocate and zero a new blockvector of NBLOCKS blocks. */

static
struct blockvector *
new_bvect(nblocks)
{
	struct blockvector *bv;
	int size;

	size = sizeof(struct blockvector) + nblocks * sizeof(struct block*);
	bv = (struct blockvector *) xzalloc(size);

	BLOCKVECTOR_NBLOCKS(bv) = nblocks;

	return bv;
}

/* Allocate and zero a new block of MAXSYMS symbols */

static
struct block *
new_block(maxsyms)
{
	int size = sizeof(struct block) + (maxsyms-1) * sizeof(struct symbol *);
	struct block *b = (struct block *)xzalloc(size);

	return b;
}

/* Ooops, too big. Shrink block B in symtab S to its minimal size.
   Shrink_block can also be used by add_symbol to grow a block.  */

static struct block *
shrink_block(b, s)
	struct block *b;
	struct symtab *s;
{
	struct block *new;
	struct blockvector *bv = BLOCKVECTOR(s);
	int i;

	/* Just reallocate it and fix references to the old one */

	new = (struct block *) xrealloc ((char *)b, sizeof(struct block) +
	  	(BLOCK_NSYMS(b)-1) * sizeof(struct symbol *));

	/* Should chase pointers to old one.  Fortunately, that`s just
	   the block`s function and inferior blocks */
	if (BLOCK_FUNCTION(new) && SYMBOL_BLOCK_VALUE(BLOCK_FUNCTION(new)) == b)
		SYMBOL_BLOCK_VALUE(BLOCK_FUNCTION(new)) = new;
	for (i = 0; i < BLOCKVECTOR_NBLOCKS(bv); i++)
		if (BLOCKVECTOR_BLOCK(bv,i) == b)
			BLOCKVECTOR_BLOCK(bv,i) = new;
		else if (BLOCK_SUPERBLOCK(BLOCKVECTOR_BLOCK(bv,i)) == b)
			BLOCK_SUPERBLOCK(BLOCKVECTOR_BLOCK(bv,i)) = new;
	return new;
}

/* Create a new symbol with printname NAME */

static
struct symbol *
new_symbol(name)
	char *name;
{
	struct symbol *s = (struct symbol *) 
		obstack_alloc (symbol_obstack, sizeof (struct symbol));

	bzero (s, sizeof (*s));
	SYMBOL_NAME(s) = name;
	return s;
}

/* Create a new type with printname NAME */

static
struct type *
new_type(name)
	char *name;
{
	struct type *t = (struct type *)
		obstack_alloc (symbol_obstack, sizeof (struct type));

	bzero (t, sizeof (*t));
	TYPE_VPTR_FIELDNO (t) = -1;
	TYPE_NAME(t) = name;
	return t;
}

/* Create and initialize a new type with printname NAME.
   CODE and LENGTH are the initial info we put in,
   UNS says whether the type is unsigned or not.  */

static
struct type *
make_type(code, length, uns, name)
     enum type_code code;
     int length, uns;
     char *name;
{
	register struct type *type;

	type = (struct type *) xzalloc(sizeof(struct type));
	TYPE_CODE(type) = code;
	TYPE_LENGTH(type) = length;
	TYPE_FLAGS(type) = uns ? TYPE_FLAG_UNSIGNED : 0;
	TYPE_NAME(type) = name;
	TYPE_VPTR_FIELDNO (type) = -1;

	return type;
}

/* Allocate a new field named NAME to the type TYPE */

static
struct field *
new_field(type,name)
	struct type *type;
	char *name;
{
	struct field *f;

	/* Fields are kept in an array */
	if (TYPE_NFIELDS(type))
		TYPE_FIELDS(type) = (struct field*)xrealloc(TYPE_FIELDS(type),
			(TYPE_NFIELDS(type)+1) * sizeof(struct field));
	else
		TYPE_FIELDS(type) = (struct field*)xzalloc(sizeof(struct field));
	f = &(TYPE_FIELD(type,TYPE_NFIELDS(type)));
	TYPE_NFIELDS(type)++;
	bzero(f, sizeof(struct field));
	f->name = name;		/* Whether or not NAME is zero, this works. */
	return f;
}

/* Make an enum constant for a member F of an enumerated type T */

static
make_enum_constant(f,t)
	struct field *f;
	struct type *t;
{
	struct symbol *s;
	/*
	 * This is awful, but that`s the way it is supposed to be
	 * (BTW, no need to free the real 'type', it's a builtin)
	 */
	f->type = (struct type *) f->bitpos;

	s = new_symbol(f->name);
	SYMBOL_NAMESPACE(s) = VAR_NAMESPACE;
	SYMBOL_CLASS(s) = LOC_CONST;
	SYMBOL_TYPE(s) = t;
	SYMBOL_VALUE(s) = f->bitpos;
	add_symbol(s, top_stack->cur_block);
}



/* Things used for calling functions in the inferior.
   These functions are exported to our companion
   mips-dep.c file and are here because they play
   with the symbol-table explicitly. */

#if 0
/* Need to make a new symbol on the fly for the dummy
   frame we put on the stack.  Which goes in the.. */

static struct symtab *dummy_symtab;

/* Make up a dummy symbol for the code we put at END_PC,
   of size SIZE, invoking a function with NARGS arguments
   and using a frame of FRAMESIZE bytes */

mips_create_dummy_symbol(end_pc, size, nargs, framesize)
{
	struct block   *bl;
	struct symbol  *g;
	struct mips_extra_func_info *gdbinfo;

	/* Allocate symtab if not done already */
	if (dummy_symtab == 0)
		dummy_symtab = new_symtab(".dummy_symtab.", 100, 0);

	/* Make a new block. Only needs one symbol */
	bl = new_block(1);
	BLOCK_START(bl) = end_pc - size;
	BLOCK_END(bl) = end_pc;

	BLOCK_SUPERBLOCK(bl) =
		BLOCKVECTOR_BLOCK(BLOCKVECTOR(dummy_symtab),GLOBAL_BLOCK);
	add_block(bl, dummy_symtab);
	sort_blocks(dummy_symtab);

	BLOCK_FUNCTION(bl) = new_symbol("??");
	SYMBOL_BLOCK_VALUE(BLOCK_FUNCTION(bl)) = bl;
	g = new_symbol(".gdbinfo.");
	BLOCK_SYM(bl,BLOCK_NSYMS(bl)++) = g;

	SYMBOL_NAMESPACE(g) = LABEL_NAMESPACE;
	SYMBOL_CLASS(g) = LOC_CONST;
	SYMBOL_TYPE(g) = builtin_type_void;
	gdbinfo = (struct mips_extra_func_info *)
		xzalloc(sizeof(struct mips_extra_func_info));

	SYMBOL_VALUE(g) = (long) gdbinfo;

	gdbinfo->numargs = nargs;
	gdbinfo->framesize = framesize;
	gdbinfo->framereg = 29;
	gdbinfo->pcreg = 31;
	gdbinfo->regmask = -2;
	gdbinfo->regoffset = -4;
	gdbinfo->fregmask = 0;	/* XXX */
	gdbinfo->fregoffset = 0;	/* XXX */
}

/* We just returned from the dummy code at END_PC, drop its symbol */

mips_destroy_dummy_symbol(end_pc)
{
	struct block *bl;
	struct blockvector *bv = BLOCKVECTOR(dummy_symtab);
	int i;

	bl = block_for_pc(end_pc);
	free(BLOCK_FUNCTION(bl));
	free(SYMBOL_VALUE(BLOCK_SYM(bl,0)));
	free(BLOCK_SYM(bl,0));

	for (i = FIRST_LOCAL_BLOCK; i < BLOCKVECTOR_NBLOCKS(bv); i++)
		if (BLOCKVECTOR_BLOCK(bv,i) == bl)
			break;
	for (; i < BLOCKVECTOR_NBLOCKS(bv) - 1; i++)
		BLOCKVECTOR_BLOCK(bv,i) = BLOCKVECTOR_BLOCK(bv,i+1);
	BLOCKVECTOR_NBLOCKS(bv)--;
	sort_blocks(dummy_symtab);
	free(bl);
}
#endif

/* Sigtramp: make sure we have all the necessary information
   about the signal trampoline code. Since the official code
   from MIPS does not do so, we make up that information ourselves.
   If they fix the library (unlikely) this code will neutralize itself. */

static
fixup_sigtramp()
{
	struct symbol  *s;
	struct symtab  *st;
	struct block   *b, *b0;

	sigtramp_address = -1;

	/* We know it is sold as sigvec */
	s = lookup_symbol("sigvec", 0, VAR_NAMESPACE, 0, NULL);

	/* Most programs do not play with signals */
	if (s == 0)
		return;

	b0 = SYMBOL_BLOCK_VALUE(s);

	/* A label of sigvec, to be more precise */
	s = lookup_symbol("sigtramp", b0, VAR_NAMESPACE, 0, NULL);

	/* But maybe this program uses its own version of sigvec */
	if (s == 0)
		return;

	sigtramp_address = SYMBOL_VALUE(s);
	sigtramp_end = sigtramp_address + 0x88;	/* black magic */

	/* Did we or MIPSco fix the library ? */
	if (SYMBOL_CLASS(s) == LOC_BLOCK)
		return;

	/* But what symtab does it live in ? */
	st = find_pc_symtab(SYMBOL_VALUE(s));

	/*
	 * Ok, there goes the fix: turn it into a procedure, with all the
	 * needed info.  Note we make it a nested procedure of sigvec,
	 * which is the way the (assembly) code is actually written.
	 */
	SYMBOL_NAMESPACE(s) = VAR_NAMESPACE;
	SYMBOL_CLASS(s) = LOC_BLOCK;
	SYMBOL_TYPE(s) = make_type(TYPE_CODE_FUNC, 4, 0, 0);
	TYPE_TARGET_TYPE(SYMBOL_TYPE(s)) = builtin_type_void;

	/* Need a block to allocate .gdbinfo. in */
	b = new_block(1);
	SYMBOL_BLOCK_VALUE(s) = b;
	BLOCK_START(b) = sigtramp_address;
	BLOCK_END(b) = sigtramp_end;
	BLOCK_FUNCTION(b) = s;
	BLOCK_SUPERBLOCK(b) = BLOCK_SUPERBLOCK(b0);
	add_block(b, st);
	sort_blocks(st);

	/* Make a .gdbinfo. for it */
	{
		struct mips_extra_func_info *e =
			(struct mips_extra_func_info *)
			xzalloc(sizeof(struct mips_extra_func_info));

		e->numargs = 0;	/* the kernel thinks otherwise */
		/* align_longword(sigcontext + SIGFRAME) */
		e->framesize = 0x150;
		e->framereg = SP_REGNUM;
		e->pcreg = 31;
		e->regmask = -2;
		e->regoffset = -(41 * sizeof(int));
		e->fregmask = -1;
		e->fregoffset = -(37 * sizeof(int));
		e->isym = (long)s;

		s = new_symbol(".gdbinfo.");
		SYMBOL_VALUE(s) = (int) e;
		SYMBOL_NAMESPACE(s) = LABEL_NAMESPACE;
		SYMBOL_CLASS(s) = LOC_CONST;
		SYMBOL_TYPE(s) = builtin_type_void;
	}

	BLOCK_SYM(b,BLOCK_NSYMS(b)++) = s;
}

/* Initialization */

static struct sym_fns ecoff_sym_fns = {"ecoff", 5,
		mipscoff_new_init, mipscoff_symfile_init,
		mipscoff_symfile_read};

_initialize_mipsread ()
{
	add_symtab_fns (&ecoff_sym_fns);

	/* Missing basic types */
	builtin_type_string = make_type(TYPE_CODE_PASCAL_ARRAY,
					1, 0, "string");
	builtin_type_complex = make_type(TYPE_CODE_FLT,
					 2 * sizeof(float), 0, "complex");
	builtin_type_double_complex = make_type(TYPE_CODE_FLT,
				    2 * sizeof(double), 0, "double_complex");
	builtin_type_fixed_dec = make_type(TYPE_CODE_INT, sizeof(int),
					   0, "fixed_decimal");
	builtin_type_float_dec = make_type(TYPE_CODE_FLT, sizeof(double),
					   0, "floating_decimal");

	/* Templates types */
	builtin_type_struct = make_type(TYPE_CODE_STRUCT, 0, 0, 0);
	builtin_type_union = make_type(TYPE_CODE_UNION, 0, 0, 0);
	builtin_type_enum = make_type(TYPE_CODE_ENUM, 0, 0, 0);
	builtin_type_range = make_type(TYPE_CODE_RANGE, 0, 0, 0);
	builtin_type_set = make_type(TYPE_CODE_SET, 0, 0, 0);

	/* We can't do this now because builtin_type_void may not
	   be set yet.  Do it at symbol reading time.  */
	/* builtin_type_ptr = lookup_pointer_type (builtin_type_void); */
}