aboutsummaryrefslogtreecommitdiff
path: root/gdb/symtab.c
blob: dcaae5287c850ec50647642693c3bc9d40ab2efd (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
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
/* Symbol table lookup for the GNU debugger, 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.  */

#include "defs.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "gdbcore.h"
#include "frame.h"
#include "target.h"
#include "value.h"
#include "symfile.h"
#include "objfiles.h"
#include "gdbcmd.h"
#include "call-cmds.h"
#include "gdb_regex.h"
#include "expression.h"
#include "language.h"
#include "demangle.h"
#include "inferior.h"
#include "linespec.h"
#include "filenames.h"		/* for FILENAME_CMP */

#include "obstack.h"

#include <sys/types.h>
#include <fcntl.h>
#include "gdb_string.h"
#include "gdb_stat.h"
#include <ctype.h>
#include "cp-abi.h"

/* Prototype for one function in parser-defs.h,
   instead of including that entire file. */

extern char *find_template_name_end (char *);

/* Prototypes for local functions */

static void completion_list_add_name (char *, char *, int, char *, char *);

static void rbreak_command (char *, int);

static void types_info (char *, int);

static void functions_info (char *, int);

static void variables_info (char *, int);

static void sources_info (char *, int);

static void output_source_filename (char *, int *);

static int find_line_common (struct linetable *, int, int *);

/* This one is used by linespec.c */

char *operator_chars (char *p, char **end);

static struct partial_symbol *lookup_partial_symbol (struct partial_symtab *,
						     const char *, int,
						     namespace_enum);

static struct symtab *lookup_symtab_1 (const char *);

static struct symbol *lookup_symbol_aux (const char *name, const
					 struct block *block, const
					 namespace_enum namespace, int
					 *is_a_field_of_this, struct
					 symtab **symtab);


static struct symbol *find_active_alias (struct symbol *sym, CORE_ADDR addr);

/* This flag is used in hppa-tdep.c, and set in hp-symtab-read.c */
/* Signals the presence of objects compiled by HP compilers */
int hp_som_som_object_present = 0;

static void fixup_section (struct general_symbol_info *, struct objfile *);

static int file_matches (char *, char **, int);

static void print_symbol_info (namespace_enum,
			       struct symtab *, struct symbol *, int, char *);

static void print_msymbol_info (struct minimal_symbol *);

static void symtab_symbol_info (char *, namespace_enum, int);

static void overload_list_add_symbol (struct symbol *sym, char *oload_name);

void _initialize_symtab (void);

/* */

/* The single non-language-specific builtin type */
struct type *builtin_type_error;

/* Block in which the most recently searched-for symbol was found.
   Might be better to make this a parameter to lookup_symbol and 
   value_of_this. */

const struct block *block_found;

/* While the C++ support is still in flux, issue a possibly helpful hint on
   using the new command completion feature on single quoted demangled C++
   symbols.  Remove when loose ends are cleaned up.   FIXME -fnf */

static void
cplusplus_hint (char *name)
{
  while (*name == '\'')
    name++;
  printf_filtered ("Hint: try '%s<TAB> or '%s<ESC-?>\n", name, name);
  printf_filtered ("(Note leading single quote.)\n");
}

/* Check for a symtab of a specific name; first in symtabs, then in
   psymtabs.  *If* there is no '/' in the name, a match after a '/'
   in the symtab filename will also work.  */

static struct symtab *
lookup_symtab_1 (const char *name)
{
  register struct symtab *s;
  register struct partial_symtab *ps;
  register struct objfile *objfile;

got_symtab:

  /* First, search for an exact match */

  ALL_SYMTABS (objfile, s)
    if (FILENAME_CMP (name, s->filename) == 0)
      return s;

  /* Now, search for a matching tail (only if name doesn't have any dirs) */

  if (lbasename (name) == name)
    ALL_SYMTABS (objfile, s)
    {
      if (FILENAME_CMP (lbasename (s->filename), name) == 0)
	return s;
    }

  /* Same search rules as above apply here, but now we look thru the
     psymtabs.  */

  ps = lookup_partial_symtab (name);
  if (!ps)
    return (NULL);

  if (ps->readin)
    error ("Internal: readin %s pst for `%s' found when no symtab found.",
	   ps->filename, name);

  s = PSYMTAB_TO_SYMTAB (ps);

  if (s)
    return s;

  /* At this point, we have located the psymtab for this file, but
     the conversion to a symtab has failed.  This usually happens
     when we are looking up an include file.  In this case,
     PSYMTAB_TO_SYMTAB doesn't return a symtab, even though one has
     been created.  So, we need to run through the symtabs again in
     order to find the file.
     XXX - This is a crock, and should be fixed inside of the the
     symbol parsing routines. */
  goto got_symtab;
}

/* Lookup the symbol table of a source file named NAME.  Try a couple
   of variations if the first lookup doesn't work.  */

struct symtab *
lookup_symtab (const char *name)
{
  register struct symtab *s;
#if 0
  register char *copy;
#endif

  s = lookup_symtab_1 (name);
  if (s)
    return s;

#if 0
  /* This screws c-exp.y:yylex if there is both a type "tree" and a symtab
     "tree.c".  */

  /* If name not found as specified, see if adding ".c" helps.  */
  /* Why is this?  Is it just a user convenience?  (If so, it's pretty
     questionable in the presence of C++, FORTRAN, etc.).  It's not in
     the GDB manual.  */

  copy = (char *) alloca (strlen (name) + 3);
  strcpy (copy, name);
  strcat (copy, ".c");
  s = lookup_symtab_1 (copy);
  if (s)
    return s;
#endif /* 0 */

  /* We didn't find anything; die.  */
  return 0;
}

/* Lookup the partial symbol table of a source file named NAME.
   *If* there is no '/' in the name, a match after a '/'
   in the psymtab filename will also work.  */

struct partial_symtab *
lookup_partial_symtab (const char *name)
{
  register struct partial_symtab *pst;
  register struct objfile *objfile;

  ALL_PSYMTABS (objfile, pst)
  {
    if (FILENAME_CMP (name, pst->filename) == 0)
      {
	return (pst);
      }
  }

  /* Now, search for a matching tail (only if name doesn't have any dirs) */

  if (lbasename (name) == name)
    ALL_PSYMTABS (objfile, pst)
    {
      if (FILENAME_CMP (lbasename (pst->filename), name) == 0)
	return (pst);
    }

  return (NULL);
}

/* Mangle a GDB method stub type.  This actually reassembles the pieces of the
   full method name, which consist of the class name (from T), the unadorned
   method name from METHOD_ID, and the signature for the specific overload,
   specified by SIGNATURE_ID.  Note that this function is g++ specific. */

char *
gdb_mangle_name (struct type *type, int method_id, int signature_id)
{
  int mangled_name_len;
  char *mangled_name;
  struct fn_field *f = TYPE_FN_FIELDLIST1 (type, method_id);
  struct fn_field *method = &f[signature_id];
  char *field_name = TYPE_FN_FIELDLIST_NAME (type, method_id);
  char *physname = TYPE_FN_FIELD_PHYSNAME (f, signature_id);
  char *newname = type_name_no_tag (type);

  /* Does the form of physname indicate that it is the full mangled name
     of a constructor (not just the args)?  */
  int is_full_physname_constructor;

  int is_constructor;
  int is_destructor = is_destructor_name (physname);
  /* Need a new type prefix.  */
  char *const_prefix = method->is_const ? "C" : "";
  char *volatile_prefix = method->is_volatile ? "V" : "";
  char buf[20];
  int len = (newname == NULL ? 0 : strlen (newname));

  if (is_operator_name (field_name))
    return xstrdup (physname);

  is_full_physname_constructor = is_constructor_name (physname);

  is_constructor =
    is_full_physname_constructor || (newname && STREQ (field_name, newname));

  if (!is_destructor)
    is_destructor = (strncmp (physname, "__dt", 4) == 0);

  if (is_destructor || is_full_physname_constructor)
    {
      mangled_name = (char *) xmalloc (strlen (physname) + 1);
      strcpy (mangled_name, physname);
      return mangled_name;
    }

  if (len == 0)
    {
      sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
    }
  else if (physname[0] == 't' || physname[0] == 'Q')
    {
      /* The physname for template and qualified methods already includes
         the class name.  */
      sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
      newname = NULL;
      len = 0;
    }
  else
    {
      sprintf (buf, "__%s%s%d", const_prefix, volatile_prefix, len);
    }
  mangled_name_len = ((is_constructor ? 0 : strlen (field_name))
		      + strlen (buf) + len + strlen (physname) + 1);

    {
      mangled_name = (char *) xmalloc (mangled_name_len);
      if (is_constructor)
	mangled_name[0] = '\0';
      else
	strcpy (mangled_name, field_name);
    }
  strcat (mangled_name, buf);
  /* If the class doesn't have a name, i.e. newname NULL, then we just
     mangle it using 0 for the length of the class.  Thus it gets mangled
     as something starting with `::' rather than `classname::'. */
  if (newname != NULL)
    strcat (mangled_name, newname);

  strcat (mangled_name, physname);
  return (mangled_name);
}



/* Find which partial symtab on contains PC and SECTION.  Return 0 if none.  */

struct partial_symtab *
find_pc_sect_psymtab (CORE_ADDR pc, asection *section)
{
  register struct partial_symtab *pst;
  register struct objfile *objfile;

  ALL_PSYMTABS (objfile, pst)
  {
    if (pc >= pst->textlow && pc < pst->texthigh)
      {
	struct minimal_symbol *msymbol;
	struct partial_symtab *tpst;

	/* An objfile that has its functions reordered might have
	   many partial symbol tables containing the PC, but
	   we want the partial symbol table that contains the
	   function containing the PC.  */
	if (!(objfile->flags & OBJF_REORDERED) &&
	    section == 0)	/* can't validate section this way */
	  return (pst);

	msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
	if (msymbol == NULL)
	  return (pst);

	for (tpst = pst; tpst != NULL; tpst = tpst->next)
	  {
	    if (pc >= tpst->textlow && pc < tpst->texthigh)
	      {
		struct partial_symbol *p;

		p = find_pc_sect_psymbol (tpst, pc, section);
		if (p != NULL
		    && SYMBOL_VALUE_ADDRESS (p)
		    == SYMBOL_VALUE_ADDRESS (msymbol))
		  return (tpst);
	      }
	  }
	return (pst);
      }
  }
  return (NULL);
}

/* Find which partial symtab contains PC.  Return 0 if none. 
   Backward compatibility, no section */

struct partial_symtab *
find_pc_psymtab (CORE_ADDR pc)
{
  return find_pc_sect_psymtab (pc, find_pc_mapped_section (pc));
}

/* Find which partial symbol within a psymtab matches PC and SECTION.  
   Return 0 if none.  Check all psymtabs if PSYMTAB is 0.  */

struct partial_symbol *
find_pc_sect_psymbol (struct partial_symtab *psymtab, CORE_ADDR pc,
		      asection *section)
{
  struct partial_symbol *best = NULL, *p, **pp;
  CORE_ADDR best_pc;

  if (!psymtab)
    psymtab = find_pc_sect_psymtab (pc, section);
  if (!psymtab)
    return 0;

  /* Cope with programs that start at address 0 */
  best_pc = (psymtab->textlow != 0) ? psymtab->textlow - 1 : 0;

  /* Search the global symbols as well as the static symbols, so that
     find_pc_partial_function doesn't use a minimal symbol and thus
     cache a bad endaddr.  */
  for (pp = psymtab->objfile->global_psymbols.list + psymtab->globals_offset;
    (pp - (psymtab->objfile->global_psymbols.list + psymtab->globals_offset)
     < psymtab->n_global_syms);
       pp++)
    {
      p = *pp;
      if (SYMBOL_NAMESPACE (p) == VAR_NAMESPACE
	  && SYMBOL_CLASS (p) == LOC_BLOCK
	  && pc >= SYMBOL_VALUE_ADDRESS (p)
	  && (SYMBOL_VALUE_ADDRESS (p) > best_pc
	      || (psymtab->textlow == 0
		  && best_pc == 0 && SYMBOL_VALUE_ADDRESS (p) == 0)))
	{
	  if (section)		/* match on a specific section */
	    {
	      fixup_psymbol_section (p, psymtab->objfile);
	      if (SYMBOL_BFD_SECTION (p) != section)
		continue;
	    }
	  best_pc = SYMBOL_VALUE_ADDRESS (p);
	  best = p;
	}
    }

  for (pp = psymtab->objfile->static_psymbols.list + psymtab->statics_offset;
    (pp - (psymtab->objfile->static_psymbols.list + psymtab->statics_offset)
     < psymtab->n_static_syms);
       pp++)
    {
      p = *pp;
      if (SYMBOL_NAMESPACE (p) == VAR_NAMESPACE
	  && SYMBOL_CLASS (p) == LOC_BLOCK
	  && pc >= SYMBOL_VALUE_ADDRESS (p)
	  && (SYMBOL_VALUE_ADDRESS (p) > best_pc
	      || (psymtab->textlow == 0
		  && best_pc == 0 && SYMBOL_VALUE_ADDRESS (p) == 0)))
	{
	  if (section)		/* match on a specific section */
	    {
	      fixup_psymbol_section (p, psymtab->objfile);
	      if (SYMBOL_BFD_SECTION (p) != section)
		continue;
	    }
	  best_pc = SYMBOL_VALUE_ADDRESS (p);
	  best = p;
	}
    }

  return best;
}

/* Find which partial symbol within a psymtab matches PC.  Return 0 if none.  
   Check all psymtabs if PSYMTAB is 0.  Backwards compatibility, no section. */

struct partial_symbol *
find_pc_psymbol (struct partial_symtab *psymtab, CORE_ADDR pc)
{
  return find_pc_sect_psymbol (psymtab, pc, find_pc_mapped_section (pc));
}

/* Debug symbols usually don't have section information.  We need to dig that
   out of the minimal symbols and stash that in the debug symbol.  */

static void
fixup_section (struct general_symbol_info *ginfo, struct objfile *objfile)
{
  struct minimal_symbol *msym;
  msym = lookup_minimal_symbol (ginfo->name, NULL, objfile);

  if (msym)
    {
      ginfo->bfd_section = SYMBOL_BFD_SECTION (msym);
      ginfo->section = SYMBOL_SECTION (msym);
    }
}

struct symbol *
fixup_symbol_section (struct symbol *sym, struct objfile *objfile)
{
  if (!sym)
    return NULL;

  if (SYMBOL_BFD_SECTION (sym))
    return sym;

  fixup_section (&sym->ginfo, objfile);

  return sym;
}

struct partial_symbol *
fixup_psymbol_section (struct partial_symbol *psym, struct objfile *objfile)
{
  if (!psym)
    return NULL;

  if (SYMBOL_BFD_SECTION (psym))
    return psym;

  fixup_section (&psym->ginfo, objfile);

  return psym;
}

/* Find the definition for a specified symbol name NAME
   in namespace NAMESPACE, visible from lexical block BLOCK.
   Returns the struct symbol pointer, or zero if no symbol is found.
   If SYMTAB is non-NULL, store the symbol table in which the
   symbol was found there, or NULL if not found.
   C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
   NAME is a field of the current implied argument `this'.  If so set
   *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero. 
   BLOCK_FOUND is set to the block in which NAME is found (in the case of
   a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */

/* This function has a bunch of loops in it and it would seem to be
   attractive to put in some QUIT's (though I'm not really sure
   whether it can run long enough to be really important).  But there
   are a few calls for which it would appear to be bad news to quit
   out of here: find_proc_desc in alpha-tdep.c and mips-tdep.c, and
   nindy_frame_chain_valid in nindy-tdep.c.  (Note that there is C++
   code below which can error(), but that probably doesn't affect
   these calls since they are looking for a known variable and thus
   can probably assume it will never hit the C++ code).  */

struct symbol *
lookup_symbol (const char *name, const struct block *block,
	       const namespace_enum namespace, int *is_a_field_of_this,
	       struct symtab **symtab)
{
  char *modified_name = NULL;
  char *modified_name2 = NULL;
  int needtofreename = 0;
  struct symbol *returnval;

  if (case_sensitivity == case_sensitive_off)
    {
      char *copy;
      int len, i;

      len = strlen (name);
      copy = (char *) alloca (len + 1);
      for (i= 0; i < len; i++)
        copy[i] = tolower (name[i]);
      copy[len] = 0;
      modified_name = copy;
    }
  else 
      modified_name = (char *) name;

  /* If we are using C++ language, demangle the name before doing a lookup, so
     we can always binary search. */
  if (current_language->la_language == language_cplus)
    {
      modified_name2 = cplus_demangle (modified_name, DMGL_ANSI | DMGL_PARAMS);
      if (modified_name2)
	{
	  modified_name = modified_name2;
	  needtofreename = 1;
	}
    }

  returnval = lookup_symbol_aux (modified_name, block, namespace,
				 is_a_field_of_this, symtab);
  if (needtofreename)
    xfree (modified_name2);

  return returnval;	 
}

static struct symbol *
lookup_symbol_aux (const char *name, const struct block *block,
	       const namespace_enum namespace, int *is_a_field_of_this,
	       struct symtab **symtab)
{
  register struct symbol *sym;
  register struct symtab *s = NULL;
  register struct partial_symtab *ps;
  register struct blockvector *bv;
  register struct objfile *objfile = NULL;
  register struct block *b;
  register struct minimal_symbol *msymbol;


  /* Search specified block and its superiors.  */

  while (block != 0)
    {
      sym = lookup_block_symbol (block, name, namespace);
      if (sym)
	{
	  block_found = block;
	  if (symtab != NULL)
	    {
	      /* Search the list of symtabs for one which contains the
	         address of the start of this block.  */
	      ALL_SYMTABS (objfile, s)
	      {
		bv = BLOCKVECTOR (s);
		b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
		if (BLOCK_START (b) <= BLOCK_START (block)
		    && BLOCK_END (b) > BLOCK_START (block))
		  goto found;
	      }
	    found:
	      *symtab = s;
	    }

	  return fixup_symbol_section (sym, objfile);
	}
      block = BLOCK_SUPERBLOCK (block);
    }

  /* FIXME: this code is never executed--block is always NULL at this
     point.  What is it trying to do, anyway?  We already should have
     checked the STATIC_BLOCK above (it is the superblock of top-level
     blocks).  Why is VAR_NAMESPACE special-cased?  */
  /* Don't need to mess with the psymtabs; if we have a block,
     that file is read in.  If we don't, then we deal later with
     all the psymtab stuff that needs checking.  */
  /* Note (RT): The following never-executed code looks unnecessary to me also.
   * If we change the code to use the original (passed-in)
   * value of 'block', we could cause it to execute, but then what
   * would it do? The STATIC_BLOCK of the symtab containing the passed-in
   * 'block' was already searched by the above code. And the STATIC_BLOCK's
   * of *other* symtabs (those files not containing 'block' lexically)
   * should not contain 'block' address-wise. So we wouldn't expect this
   * code to find any 'sym''s that were not found above. I vote for 
   * deleting the following paragraph of code.
   */
  if (namespace == VAR_NAMESPACE && block != NULL)
    {
      struct block *b;
      /* Find the right symtab.  */
      ALL_SYMTABS (objfile, s)
      {
	bv = BLOCKVECTOR (s);
	b = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
	if (BLOCK_START (b) <= BLOCK_START (block)
	    && BLOCK_END (b) > BLOCK_START (block))
	  {
	    sym = lookup_block_symbol (b, name, VAR_NAMESPACE);
	    if (sym)
	      {
		block_found = b;
		if (symtab != NULL)
		  *symtab = s;
		return fixup_symbol_section (sym, objfile);
	      }
	  }
      }
    }


  /* C++: If requested to do so by the caller, 
     check to see if NAME is a field of `this'. */
  if (is_a_field_of_this)
    {
      struct value *v = value_of_this (0);

      *is_a_field_of_this = 0;
      if (v && check_field (v, name))
	{
	  *is_a_field_of_this = 1;
	  if (symtab != NULL)
	    *symtab = NULL;
	  return NULL;
	}
    }

  /* Now search all global blocks.  Do the symtab's first, then
     check the psymtab's. If a psymtab indicates the existence
     of the desired name as a global, then do psymtab-to-symtab
     conversion on the fly and return the found symbol. */

  ALL_SYMTABS (objfile, s)
  {
    bv = BLOCKVECTOR (s);
    block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
    sym = lookup_block_symbol (block, name, namespace);
    if (sym)
      {
	block_found = block;
	if (symtab != NULL)
	  *symtab = s;
	return fixup_symbol_section (sym, objfile);
      }
  }

#ifndef HPUXHPPA

  /* Check for the possibility of the symbol being a function or
     a mangled variable that is stored in one of the minimal symbol tables.
     Eventually, all global symbols might be resolved in this way.  */

  if (namespace == VAR_NAMESPACE)
    {
      msymbol = lookup_minimal_symbol (name, NULL, NULL);
      if (msymbol != NULL)
	{
	  s = find_pc_sect_symtab (SYMBOL_VALUE_ADDRESS (msymbol),
				   SYMBOL_BFD_SECTION (msymbol));
	  if (s != NULL)
	    {
	      /* This is a function which has a symtab for its address.  */
	      bv = BLOCKVECTOR (s);
	      block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
	      sym = lookup_block_symbol (block, SYMBOL_NAME (msymbol),
					 namespace);
	      /* We kept static functions in minimal symbol table as well as
	         in static scope. We want to find them in the symbol table. */
	      if (!sym)
		{
		  block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
		  sym = lookup_block_symbol (block, SYMBOL_NAME (msymbol),
					     namespace);
		}

	      /* sym == 0 if symbol was found in the minimal symbol table
	         but not in the symtab.
	         Return 0 to use the msymbol definition of "foo_".

	         This happens for Fortran  "foo_" symbols,
	         which are "foo" in the symtab.

	         This can also happen if "asm" is used to make a
	         regular symbol but not a debugging symbol, e.g.
	         asm(".globl _main");
	         asm("_main:");
	       */

	      if (symtab != NULL)
		*symtab = s;
	      return fixup_symbol_section (sym, objfile);
	    }
	  else if (MSYMBOL_TYPE (msymbol) != mst_text
		   && MSYMBOL_TYPE (msymbol) != mst_file_text
		   && !STREQ (name, SYMBOL_NAME (msymbol)))
	    {
	      /* This is a mangled variable, look it up by its
	         mangled name.  */
	      return lookup_symbol_aux (SYMBOL_NAME (msymbol), block,
					namespace, is_a_field_of_this, symtab);
	    }
	  /* There are no debug symbols for this file, or we are looking
	     for an unmangled variable.
	     Try to find a matching static symbol below. */
	}
    }

#endif

  ALL_PSYMTABS (objfile, ps)
  {
    if (!ps->readin && lookup_partial_symbol (ps, name, 1, namespace))
      {
	s = PSYMTAB_TO_SYMTAB (ps);
	bv = BLOCKVECTOR (s);
	block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
	sym = lookup_block_symbol (block, name, namespace);
	if (!sym)
	  {
	    /* This shouldn't be necessary, but as a last resort
	     * try looking in the statics even though the psymtab
	     * claimed the symbol was global. It's possible that
	     * the psymtab gets it wrong in some cases.
	     */
	    block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
	    sym = lookup_block_symbol (block, name, namespace);
	    if (!sym)
	      error ("Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
%s may be an inlined function, or may be a template function\n\
(if a template, try specifying an instantiation: %s<type>).",
		     name, ps->filename, name, name);
	  }
	if (symtab != NULL)
	  *symtab = s;
	return fixup_symbol_section (sym, objfile);
      }
  }

  /* Now search all static file-level symbols.
     Not strictly correct, but more useful than an error.
     Do the symtabs first, then check the psymtabs.
     If a psymtab indicates the existence
     of the desired name as a file-level static, then do psymtab-to-symtab
     conversion on the fly and return the found symbol. */

  ALL_SYMTABS (objfile, s)
  {
    bv = BLOCKVECTOR (s);
    block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
    sym = lookup_block_symbol (block, name, namespace);
    if (sym)
      {
	block_found = block;
	if (symtab != NULL)
	  *symtab = s;
	return fixup_symbol_section (sym, objfile);
      }
  }

  ALL_PSYMTABS (objfile, ps)
  {
    if (!ps->readin && lookup_partial_symbol (ps, name, 0, namespace))
      {
	s = PSYMTAB_TO_SYMTAB (ps);
	bv = BLOCKVECTOR (s);
	block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
	sym = lookup_block_symbol (block, name, namespace);
	if (!sym)
	  {
	    /* This shouldn't be necessary, but as a last resort
	     * try looking in the globals even though the psymtab
	     * claimed the symbol was static. It's possible that
	     * the psymtab gets it wrong in some cases.
	     */
	    block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
	    sym = lookup_block_symbol (block, name, namespace);
	    if (!sym)
	      error ("Internal: static symbol `%s' found in %s psymtab but not in symtab.\n\
%s may be an inlined function, or may be a template function\n\
(if a template, try specifying an instantiation: %s<type>).",
		     name, ps->filename, name, name);
	  }
	if (symtab != NULL)
	  *symtab = s;
	return fixup_symbol_section (sym, objfile);
      }
  }

#ifdef HPUXHPPA

  /* Check for the possibility of the symbol being a function or
     a global variable that is stored in one of the minimal symbol tables.
     The "minimal symbol table" is built from linker-supplied info.

     RT: I moved this check to last, after the complete search of
     the global (p)symtab's and static (p)symtab's. For HP-generated
     symbol tables, this check was causing a premature exit from
     lookup_symbol with NULL return, and thus messing up symbol lookups
     of things like "c::f". It seems to me a check of the minimal
     symbol table ought to be a last resort in any case. I'm vaguely
     worried about the comment below which talks about FORTRAN routines "foo_"
     though... is it saying we need to do the "minsym" check before
     the static check in this case? 
   */

  if (namespace == VAR_NAMESPACE)
    {
      msymbol = lookup_minimal_symbol (name, NULL, NULL);
      if (msymbol != NULL)
	{
	  /* OK, we found a minimal symbol in spite of not
	   * finding any symbol. There are various possible
	   * explanations for this. One possibility is the symbol
	   * exists in code not compiled -g. Another possibility
	   * is that the 'psymtab' isn't doing its job.
	   * A third possibility, related to #2, is that we were confused 
	   * by name-mangling. For instance, maybe the psymtab isn't
	   * doing its job because it only know about demangled
	   * names, but we were given a mangled name...
	   */

	  /* We first use the address in the msymbol to try to
	   * locate the appropriate symtab. Note that find_pc_symtab()
	   * has a side-effect of doing psymtab-to-symtab expansion,
	   * for the found symtab.
	   */
	  s = find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol));
	  if (s != NULL)
	    {
	      bv = BLOCKVECTOR (s);
	      block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
	      sym = lookup_block_symbol (block, SYMBOL_NAME (msymbol),
					 namespace);
	      /* We kept static functions in minimal symbol table as well as
	         in static scope. We want to find them in the symbol table. */
	      if (!sym)
		{
		  block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
		  sym = lookup_block_symbol (block, SYMBOL_NAME (msymbol),
					     namespace);
		}
	      /* If we found one, return it */
	      if (sym)
		{
		  if (symtab != NULL)
		    *symtab = s;
		  return sym;
		}

	      /* If we get here with sym == 0, the symbol was 
	         found in the minimal symbol table
	         but not in the symtab.
	         Fall through and return 0 to use the msymbol 
	         definition of "foo_".
	         (Note that outer code generally follows up a call
	         to this routine with a call to lookup_minimal_symbol(),
	         so a 0 return means we'll just flow into that other routine).

	         This happens for Fortran  "foo_" symbols,
	         which are "foo" in the symtab.

	         This can also happen if "asm" is used to make a
	         regular symbol but not a debugging symbol, e.g.
	         asm(".globl _main");
	         asm("_main:");
	       */
	    }

	  /* If the lookup-by-address fails, try repeating the
	   * entire lookup process with the symbol name from
	   * the msymbol (if different from the original symbol name).
	   */
	  else if (MSYMBOL_TYPE (msymbol) != mst_text
		   && MSYMBOL_TYPE (msymbol) != mst_file_text
		   && !STREQ (name, SYMBOL_NAME (msymbol)))
	    {
	      return lookup_symbol_aux (SYMBOL_NAME (msymbol), block,
					namespace, is_a_field_of_this, symtab);
	    }
	}
    }

#endif

  if (symtab != NULL)
    *symtab = NULL;
  return 0;
}
								
/* Look, in partial_symtab PST, for symbol NAME.  Check the global
   symbols if GLOBAL, the static symbols if not */

static struct partial_symbol *
lookup_partial_symbol (struct partial_symtab *pst, const char *name, int global,
		       namespace_enum namespace)
{
  struct partial_symbol *temp;
  struct partial_symbol **start, **psym;
  struct partial_symbol **top, **bottom, **center;
  int length = (global ? pst->n_global_syms : pst->n_static_syms);
  int do_linear_search = 1;
  
  if (length == 0)
    {
      return (NULL);
    }
  start = (global ?
	   pst->objfile->global_psymbols.list + pst->globals_offset :
	   pst->objfile->static_psymbols.list + pst->statics_offset);
  
  if (global)			/* This means we can use a binary search. */
    {
      do_linear_search = 0;

      /* Binary search.  This search is guaranteed to end with center
         pointing at the earliest partial symbol with the correct
         name.  At that point *all* partial symbols with that name
         will be checked against the correct namespace. */

      bottom = start;
      top = start + length - 1;
      while (top > bottom)
	{
	  center = bottom + (top - bottom) / 2;
	  if (!(center < top))
	    internal_error (__FILE__, __LINE__, "failed internal consistency check");
	  if (!do_linear_search
	      && (SYMBOL_LANGUAGE (*center) == language_java))
	    {
	      do_linear_search = 1;
	    }
	  if (strcmp (SYMBOL_SOURCE_NAME (*center), name) >= 0)
	    {
	      top = center;
	    }
	  else
	    {
	      bottom = center + 1;
	    }
	}
      if (!(top == bottom))
	internal_error (__FILE__, __LINE__, "failed internal consistency check");

      /* djb - 2000-06-03 - Use SYMBOL_MATCHES_NAME, not a strcmp, so
	 we don't have to force a linear search on C++. Probably holds true
	 for JAVA as well, no way to check.*/
      while (SYMBOL_MATCHES_NAME (*top,name))
	{
	  if (SYMBOL_NAMESPACE (*top) == namespace)
	    {
		  return (*top);
	    }
	  top++;
	}
    }

  /* Can't use a binary search or else we found during the binary search that
     we should also do a linear search. */

  if (do_linear_search)
    {			
      for (psym = start; psym < start + length; psym++)
	{
	  if (namespace == SYMBOL_NAMESPACE (*psym))
	    {
	      if (SYMBOL_MATCHES_NAME (*psym, name))
		{
		  return (*psym);
		}
	    }
	}
    }

  return (NULL);
}

/* Look up a type named NAME in the struct_namespace.  The type returned
   must not be opaque -- i.e., must have at least one field defined

   This code was modelled on lookup_symbol -- the parts not relevant to looking
   up types were just left out.  In particular it's assumed here that types
   are available in struct_namespace and only at file-static or global blocks. */


struct type *
lookup_transparent_type (const char *name)
{
  register struct symbol *sym;
  register struct symtab *s = NULL;
  register struct partial_symtab *ps;
  struct blockvector *bv;
  register struct objfile *objfile;
  register struct block *block;

  /* Now search all the global symbols.  Do the symtab's first, then
     check the psymtab's. If a psymtab indicates the existence
     of the desired name as a global, then do psymtab-to-symtab
     conversion on the fly and return the found symbol.  */

  ALL_SYMTABS (objfile, s)
  {
    bv = BLOCKVECTOR (s);
    block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
    sym = lookup_block_symbol (block, name, STRUCT_NAMESPACE);
    if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
      {
	return SYMBOL_TYPE (sym);
      }
  }

  ALL_PSYMTABS (objfile, ps)
  {
    if (!ps->readin && lookup_partial_symbol (ps, name, 1, STRUCT_NAMESPACE))
      {
	s = PSYMTAB_TO_SYMTAB (ps);
	bv = BLOCKVECTOR (s);
	block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
	sym = lookup_block_symbol (block, name, STRUCT_NAMESPACE);
	if (!sym)
	  {
	    /* This shouldn't be necessary, but as a last resort
	     * try looking in the statics even though the psymtab
	     * claimed the symbol was global. It's possible that
	     * the psymtab gets it wrong in some cases.
	     */
	    block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
	    sym = lookup_block_symbol (block, name, STRUCT_NAMESPACE);
	    if (!sym)
	      error ("Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
%s may be an inlined function, or may be a template function\n\
(if a template, try specifying an instantiation: %s<type>).",
		     name, ps->filename, name, name);
	  }
	if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
	  return SYMBOL_TYPE (sym);
      }
  }

  /* Now search the static file-level symbols.
     Not strictly correct, but more useful than an error.
     Do the symtab's first, then
     check the psymtab's. If a psymtab indicates the existence
     of the desired name as a file-level static, then do psymtab-to-symtab
     conversion on the fly and return the found symbol.
   */

  ALL_SYMTABS (objfile, s)
  {
    bv = BLOCKVECTOR (s);
    block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
    sym = lookup_block_symbol (block, name, STRUCT_NAMESPACE);
    if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
      {
	return SYMBOL_TYPE (sym);
      }
  }

  ALL_PSYMTABS (objfile, ps)
  {
    if (!ps->readin && lookup_partial_symbol (ps, name, 0, STRUCT_NAMESPACE))
      {
	s = PSYMTAB_TO_SYMTAB (ps);
	bv = BLOCKVECTOR (s);
	block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
	sym = lookup_block_symbol (block, name, STRUCT_NAMESPACE);
	if (!sym)
	  {
	    /* This shouldn't be necessary, but as a last resort
	     * try looking in the globals even though the psymtab
	     * claimed the symbol was static. It's possible that
	     * the psymtab gets it wrong in some cases.
	     */
	    block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
	    sym = lookup_block_symbol (block, name, STRUCT_NAMESPACE);
	    if (!sym)
	      error ("Internal: static symbol `%s' found in %s psymtab but not in symtab.\n\
%s may be an inlined function, or may be a template function\n\
(if a template, try specifying an instantiation: %s<type>).",
		     name, ps->filename, name, name);
	  }
	if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
	  return SYMBOL_TYPE (sym);
      }
  }
  return (struct type *) 0;
}


/* Find the psymtab containing main(). */
/* FIXME:  What about languages without main() or specially linked
   executables that have no main() ? */

struct partial_symtab *
find_main_psymtab (void)
{
  register struct partial_symtab *pst;
  register struct objfile *objfile;

  ALL_PSYMTABS (objfile, pst)
  {
    if (lookup_partial_symbol (pst, main_name (), 1, VAR_NAMESPACE))
      {
	return (pst);
      }
  }
  return (NULL);
}

/* Search BLOCK for symbol NAME in NAMESPACE.

   Note that if NAME is the demangled form of a C++ symbol, we will fail
   to find a match during the binary search of the non-encoded names, but
   for now we don't worry about the slight inefficiency of looking for
   a match we'll never find, since it will go pretty quick.  Once the
   binary search terminates, we drop through and do a straight linear
   search on the symbols.  Each symbol which is marked as being a C++
   symbol (language_cplus set) has both the encoded and non-encoded names
   tested for a match. */

struct symbol *
lookup_block_symbol (register const struct block *block, const char *name,
		     const namespace_enum namespace)
{
  register int bot, top, inc;
  register struct symbol *sym;
  register struct symbol *sym_found = NULL;
  register int do_linear_search = 1;

  /* If the blocks's symbols were sorted, start with a binary search.  */

  if (BLOCK_SHOULD_SORT (block))
    {
      /* Reset the linear search flag so if the binary search fails, we
         won't do the linear search once unless we find some reason to
         do so */

      do_linear_search = 0;
      top = BLOCK_NSYMS (block);
      bot = 0;

      /* Advance BOT to not far before the first symbol whose name is NAME. */

      while (1)
	{
	  inc = (top - bot + 1);
	  /* No need to keep binary searching for the last few bits worth.  */
	  if (inc < 4)
	    {
	      break;
	    }
	  inc = (inc >> 1) + bot;
	  sym = BLOCK_SYM (block, inc);
	  if (!do_linear_search && (SYMBOL_LANGUAGE (sym) == language_java))
	    {
	      do_linear_search = 1;
	    }
	  if (SYMBOL_SOURCE_NAME (sym)[0] < name[0])
	    {
	      bot = inc;
	    }
	  else if (SYMBOL_SOURCE_NAME (sym)[0] > name[0])
	    {
	      top = inc;
	    }
	  else if (strcmp (SYMBOL_SOURCE_NAME (sym), name) < 0)
	    {
	      bot = inc;
	    }
	  else
	    {
	      top = inc;
	    }
	}

      /* Now scan forward until we run out of symbols, find one whose
         name is greater than NAME, or find one we want.  If there is
         more than one symbol with the right name and namespace, we
         return the first one; I believe it is now impossible for us
         to encounter two symbols with the same name and namespace
         here, because blocks containing argument symbols are no
         longer sorted.  */

      top = BLOCK_NSYMS (block);
      while (bot < top)
	{
	  sym = BLOCK_SYM (block, bot);
	  if (SYMBOL_NAMESPACE (sym) == namespace &&
	      SYMBOL_MATCHES_NAME (sym, name))
	    {
	      return sym;
	    }
	  bot++;
	}
    }

  /* Here if block isn't sorted, or we fail to find a match during the
     binary search above.  If during the binary search above, we find a
     symbol which is a C++ symbol, then we have re-enabled the linear
     search flag which was reset when starting the binary search.

     This loop is equivalent to the loop above, but hacked greatly for speed.

     Note that parameter symbols do not always show up last in the
     list; this loop makes sure to take anything else other than
     parameter symbols first; it only uses parameter symbols as a
     last resort.  Note that this only takes up extra computation
     time on a match.  */

  if (do_linear_search)
    {
      top = BLOCK_NSYMS (block);
      bot = 0;
      while (bot < top)
	{
	  sym = BLOCK_SYM (block, bot);
	  if (SYMBOL_NAMESPACE (sym) == namespace &&
	      SYMBOL_MATCHES_NAME (sym, name))
	    {
	      /* If SYM has aliases, then use any alias that is active
	         at the current PC.  If no alias is active at the current
	         PC, then use the main symbol.

	         ?!? Is checking the current pc correct?  Is this routine
	         ever called to look up a symbol from another context?

		 FIXME: No, it's not correct.  If someone sets a
		 conditional breakpoint at an address, then the
		 breakpoint's `struct expression' should refer to the
		 `struct symbol' appropriate for the breakpoint's
		 address, which may not be the PC.

		 Even if it were never called from another context,
		 it's totally bizarre for lookup_symbol's behavior to
		 depend on the value of the inferior's current PC.  We
		 should pass in the appropriate PC as well as the
		 block.  The interface to lookup_symbol should change
		 to require the caller to provide a PC.  */

	      if (SYMBOL_ALIASES (sym))
		sym = find_active_alias (sym, read_pc ());

	      sym_found = sym;
	      if (SYMBOL_CLASS (sym) != LOC_ARG &&
		  SYMBOL_CLASS (sym) != LOC_LOCAL_ARG &&
		  SYMBOL_CLASS (sym) != LOC_REF_ARG &&
		  SYMBOL_CLASS (sym) != LOC_REGPARM &&
		  SYMBOL_CLASS (sym) != LOC_REGPARM_ADDR &&
		  SYMBOL_CLASS (sym) != LOC_BASEREG_ARG)
		{
		  break;
		}
	    }
	  bot++;
	}
    }
  return (sym_found);		/* Will be NULL if not found. */
}

/* Given a main symbol SYM and ADDR, search through the alias
   list to determine if an alias is active at ADDR and return
   the active alias.

   If no alias is active, then return SYM.  */

static struct symbol *
find_active_alias (struct symbol *sym, CORE_ADDR addr)
{
  struct range_list *r;
  struct alias_list *aliases;

  /* If we have aliases, check them first.  */
  aliases = SYMBOL_ALIASES (sym);

  while (aliases)
    {
      if (!SYMBOL_RANGES (aliases->sym))
	return aliases->sym;
      for (r = SYMBOL_RANGES (aliases->sym); r; r = r->next)
	{
	  if (r->start <= addr && r->end > addr)
	    return aliases->sym;
	}
      aliases = aliases->next;
    }

  /* Nothing found, return the main symbol.  */
  return sym;
}


/* Return the symbol for the function which contains a specified
   lexical block, described by a struct block BL.  */

struct symbol *
block_function (struct block *bl)
{
  while (BLOCK_FUNCTION (bl) == 0 && BLOCK_SUPERBLOCK (bl) != 0)
    bl = BLOCK_SUPERBLOCK (bl);

  return BLOCK_FUNCTION (bl);
}

/* Find the symtab associated with PC and SECTION.  Look through the
   psymtabs and read in another symtab if necessary. */

struct symtab *
find_pc_sect_symtab (CORE_ADDR pc, asection *section)
{
  register struct block *b;
  struct blockvector *bv;
  register struct symtab *s = NULL;
  register struct symtab *best_s = NULL;
  register struct partial_symtab *ps;
  register struct objfile *objfile;
  CORE_ADDR distance = 0;

  /* Search all symtabs for the one whose file contains our address, and which
     is the smallest of all the ones containing the address.  This is designed
     to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
     and symtab b is at 0x2000-0x3000.  So the GLOBAL_BLOCK for a is from
     0x1000-0x4000, but for address 0x2345 we want to return symtab b.

     This happens for native ecoff format, where code from included files
     gets its own symtab. The symtab for the included file should have
     been read in already via the dependency mechanism.
     It might be swifter to create several symtabs with the same name
     like xcoff does (I'm not sure).

     It also happens for objfiles that have their functions reordered.
     For these, the symtab we are looking for is not necessarily read in.  */

  ALL_SYMTABS (objfile, s)
  {
    bv = BLOCKVECTOR (s);
    b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);

    if (BLOCK_START (b) <= pc
	&& BLOCK_END (b) > pc
	&& (distance == 0
	    || BLOCK_END (b) - BLOCK_START (b) < distance))
      {
	/* For an objfile that has its functions reordered,
	   find_pc_psymtab will find the proper partial symbol table
	   and we simply return its corresponding symtab.  */
	/* In order to better support objfiles that contain both
	   stabs and coff debugging info, we continue on if a psymtab
	   can't be found. */
	if ((objfile->flags & OBJF_REORDERED) && objfile->psymtabs)
	  {
	    ps = find_pc_sect_psymtab (pc, section);
	    if (ps)
	      return PSYMTAB_TO_SYMTAB (ps);
	  }
	if (section != 0)
	  {
	    int i;

	    for (i = 0; i < b->nsyms; i++)
	      {
		fixup_symbol_section (b->sym[i], objfile);
		if (section == SYMBOL_BFD_SECTION (b->sym[i]))
		  break;
	      }
	    if (i >= b->nsyms)
	      continue;		/* no symbol in this symtab matches section */
	  }
	distance = BLOCK_END (b) - BLOCK_START (b);
	best_s = s;
      }
  }

  if (best_s != NULL)
    return (best_s);

  s = NULL;
  ps = find_pc_sect_psymtab (pc, section);
  if (ps)
    {
      if (ps->readin)
	/* Might want to error() here (in case symtab is corrupt and
	   will cause a core dump), but maybe we can successfully
	   continue, so let's not.  */
	warning ("\
(Internal error: pc 0x%s in read in psymtab, but not in symtab.)\n",
		 paddr_nz (pc));
      s = PSYMTAB_TO_SYMTAB (ps);
    }
  return (s);
}

/* Find the symtab associated with PC.  Look through the psymtabs and
   read in another symtab if necessary.  Backward compatibility, no section */

struct symtab *
find_pc_symtab (CORE_ADDR pc)
{
  return find_pc_sect_symtab (pc, find_pc_mapped_section (pc));
}


#if 0

/* Find the closest symbol value (of any sort -- function or variable)
   for a given address value.  Slow but complete.  (currently unused,
   mainly because it is too slow.  We could fix it if each symtab and
   psymtab had contained in it the addresses ranges of each of its
   sections, which also would be required to make things like "info
   line *0x2345" cause psymtabs to be converted to symtabs).  */

struct symbol *
find_addr_symbol (CORE_ADDR addr, struct symtab **symtabp, CORE_ADDR *symaddrp)
{
  struct symtab *symtab, *best_symtab;
  struct objfile *objfile;
  register int bot, top;
  register struct symbol *sym;
  register CORE_ADDR sym_addr;
  struct block *block;
  int blocknum;

  /* Info on best symbol seen so far */

  register CORE_ADDR best_sym_addr = 0;
  struct symbol *best_sym = 0;

  /* FIXME -- we should pull in all the psymtabs, too!  */
  ALL_SYMTABS (objfile, symtab)
  {
    /* Search the global and static blocks in this symtab for
       the closest symbol-address to the desired address.  */

    for (blocknum = GLOBAL_BLOCK; blocknum <= STATIC_BLOCK; blocknum++)
      {
	QUIT;
	block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (symtab), blocknum);
	top = BLOCK_NSYMS (block);
	for (bot = 0; bot < top; bot++)
	  {
	    sym = BLOCK_SYM (block, bot);
	    switch (SYMBOL_CLASS (sym))
	      {
	      case LOC_STATIC:
	      case LOC_LABEL:
		sym_addr = SYMBOL_VALUE_ADDRESS (sym);
		break;

	      case LOC_INDIRECT:
		sym_addr = SYMBOL_VALUE_ADDRESS (sym);
		/* An indirect symbol really lives at *sym_addr,
		 * so an indirection needs to be done.
		 * However, I am leaving this commented out because it's
		 * expensive, and it's possible that symbolization
		 * could be done without an active process (in
		 * case this read_memory will fail). RT
		 sym_addr = read_memory_unsigned_integer
		 (sym_addr, TARGET_PTR_BIT / TARGET_CHAR_BIT);
		 */
		break;

	      case LOC_BLOCK:
		sym_addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
		break;

	      default:
		continue;
	      }

	    if (sym_addr <= addr)
	      if (sym_addr > best_sym_addr)
		{
		  /* Quit if we found an exact match.  */
		  best_sym = sym;
		  best_sym_addr = sym_addr;
		  best_symtab = symtab;
		  if (sym_addr == addr)
		    goto done;
		}
	  }
      }
  }

done:
  if (symtabp)
    *symtabp = best_symtab;
  if (symaddrp)
    *symaddrp = best_sym_addr;
  return best_sym;
}
#endif /* 0 */

/* Find the source file and line number for a given PC value and SECTION.
   Return a structure containing a symtab pointer, a line number,
   and a pc range for the entire source line.
   The value's .pc field is NOT the specified pc.
   NOTCURRENT nonzero means, if specified pc is on a line boundary,
   use the line that ends there.  Otherwise, in that case, the line
   that begins there is used.  */

/* The big complication here is that a line may start in one file, and end just
   before the start of another file.  This usually occurs when you #include
   code in the middle of a subroutine.  To properly find the end of a line's PC
   range, we must search all symtabs associated with this compilation unit, and
   find the one whose first PC is closer than that of the next line in this
   symtab.  */

/* If it's worth the effort, we could be using a binary search.  */

struct symtab_and_line
find_pc_sect_line (CORE_ADDR pc, struct sec *section, int notcurrent)
{
  struct symtab *s;
  register struct linetable *l;
  register int len;
  register int i;
  register struct linetable_entry *item;
  struct symtab_and_line val;
  struct blockvector *bv;
  struct minimal_symbol *msymbol;
  struct minimal_symbol *mfunsym;

  /* Info on best line seen so far, and where it starts, and its file.  */

  struct linetable_entry *best = NULL;
  CORE_ADDR best_end = 0;
  struct symtab *best_symtab = 0;

  /* Store here the first line number
     of a file which contains the line at the smallest pc after PC.
     If we don't find a line whose range contains PC,
     we will use a line one less than this,
     with a range from the start of that file to the first line's pc.  */
  struct linetable_entry *alt = NULL;
  struct symtab *alt_symtab = 0;

  /* Info on best line seen in this file.  */

  struct linetable_entry *prev;

  /* If this pc is not from the current frame,
     it is the address of the end of a call instruction.
     Quite likely that is the start of the following statement.
     But what we want is the statement containing the instruction.
     Fudge the pc to make sure we get that.  */

  INIT_SAL (&val);		/* initialize to zeroes */

  if (notcurrent)
    pc -= 1;

  /* elz: added this because this function returned the wrong
     information if the pc belongs to a stub (import/export)
     to call a shlib function. This stub would be anywhere between
     two functions in the target, and the line info was erroneously 
     taken to be the one of the line before the pc. 
   */
  /* RT: Further explanation:

   * We have stubs (trampolines) inserted between procedures.
   *
   * Example: "shr1" exists in a shared library, and a "shr1" stub also
   * exists in the main image.
   *
   * In the minimal symbol table, we have a bunch of symbols
   * sorted by start address. The stubs are marked as "trampoline",
   * the others appear as text. E.g.:
   *
   *  Minimal symbol table for main image 
   *     main:  code for main (text symbol)
   *     shr1: stub  (trampoline symbol)
   *     foo:   code for foo (text symbol)
   *     ...
   *  Minimal symbol table for "shr1" image:
   *     ...
   *     shr1: code for shr1 (text symbol)
   *     ...
   *
   * So the code below is trying to detect if we are in the stub
   * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
   * and if found,  do the symbolization from the real-code address
   * rather than the stub address.
   *
   * Assumptions being made about the minimal symbol table:
   *   1. lookup_minimal_symbol_by_pc() will return a trampoline only
   *      if we're really in the trampoline. If we're beyond it (say
   *      we're in "foo" in the above example), it'll have a closer 
   *      symbol (the "foo" text symbol for example) and will not
   *      return the trampoline.
   *   2. lookup_minimal_symbol_text() will find a real text symbol
   *      corresponding to the trampoline, and whose address will
   *      be different than the trampoline address. I put in a sanity
   *      check for the address being the same, to avoid an
   *      infinite recursion.
   */
  msymbol = lookup_minimal_symbol_by_pc (pc);
  if (msymbol != NULL)
    if (MSYMBOL_TYPE (msymbol) == mst_solib_trampoline)
      {
	mfunsym = lookup_minimal_symbol_text (SYMBOL_NAME (msymbol), NULL, NULL);
	if (mfunsym == NULL)
	  /* I eliminated this warning since it is coming out
	   * in the following situation:
	   * gdb shmain // test program with shared libraries
	   * (gdb) break shr1  // function in shared lib
	   * Warning: In stub for ...
	   * In the above situation, the shared lib is not loaded yet, 
	   * so of course we can't find the real func/line info,
	   * but the "break" still works, and the warning is annoying.
	   * So I commented out the warning. RT */
	  /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_NAME(msymbol)) */ ;
	/* fall through */
	else if (SYMBOL_VALUE (mfunsym) == SYMBOL_VALUE (msymbol))
	  /* Avoid infinite recursion */
	  /* See above comment about why warning is commented out */
	  /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_NAME(msymbol)) */ ;
	/* fall through */
	else
	  return find_pc_line (SYMBOL_VALUE (mfunsym), 0);
      }


  s = find_pc_sect_symtab (pc, section);
  if (!s)
    {
      /* if no symbol information, return previous pc */
      if (notcurrent)
	pc++;
      val.pc = pc;
      return val;
    }

  bv = BLOCKVECTOR (s);

  /* Look at all the symtabs that share this blockvector.
     They all have the same apriori range, that we found was right;
     but they have different line tables.  */

  for (; s && BLOCKVECTOR (s) == bv; s = s->next)
    {
      /* Find the best line in this symtab.  */
      l = LINETABLE (s);
      if (!l)
	continue;
      len = l->nitems;
      if (len <= 0)
	{
	  /* I think len can be zero if the symtab lacks line numbers
	     (e.g. gcc -g1).  (Either that or the LINETABLE is NULL;
	     I'm not sure which, and maybe it depends on the symbol
	     reader).  */
	  continue;
	}

      prev = NULL;
      item = l->item;		/* Get first line info */

      /* Is this file's first line closer than the first lines of other files?
         If so, record this file, and its first line, as best alternate.  */
      if (item->pc > pc && (!alt || item->pc < alt->pc))
	{
	  alt = item;
	  alt_symtab = s;
	}

      for (i = 0; i < len; i++, item++)
	{
	  /* Leave prev pointing to the linetable entry for the last line
	     that started at or before PC.  */
	  if (item->pc > pc)
	    break;

	  prev = item;
	}

      /* At this point, prev points at the line whose start addr is <= pc, and
         item points at the next line.  If we ran off the end of the linetable
         (pc >= start of the last line), then prev == item.  If pc < start of
         the first line, prev will not be set.  */

      /* Is this file's best line closer than the best in the other files?
         If so, record this file, and its best line, as best so far.  */

      if (prev && (!best || prev->pc > best->pc))
	{
	  best = prev;
	  best_symtab = s;

	  /* Discard BEST_END if it's before the PC of the current BEST.  */
	  if (best_end <= best->pc)
	    best_end = 0;
	}

      /* If another line (denoted by ITEM) is in the linetable and its
         PC is after BEST's PC, but before the current BEST_END, then
	 use ITEM's PC as the new best_end.  */
      if (best && i < len && item->pc > best->pc
          && (best_end == 0 || best_end > item->pc))
	best_end = item->pc;
    }

  if (!best_symtab)
    {
      if (!alt_symtab)
	{			/* If we didn't find any line # info, just
				   return zeros.  */
	  val.pc = pc;
	}
      else
	{
	  val.symtab = alt_symtab;
	  val.line = alt->line - 1;

	  /* Don't return line 0, that means that we didn't find the line.  */
	  if (val.line == 0)
	    ++val.line;

	  val.pc = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
	  val.end = alt->pc;
	}
    }
  else
    {
      val.symtab = best_symtab;
      val.line = best->line;
      val.pc = best->pc;
      if (best_end && (!alt || best_end < alt->pc))
	val.end = best_end;
      else if (alt)
	val.end = alt->pc;
      else
	val.end = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
    }
  val.section = section;
  return val;
}

/* Backward compatibility (no section) */

struct symtab_and_line
find_pc_line (CORE_ADDR pc, int notcurrent)
{
  asection *section;

  section = find_pc_overlay (pc);
  if (pc_in_unmapped_range (pc, section))
    pc = overlay_mapped_address (pc, section);
  return find_pc_sect_line (pc, section, notcurrent);
}

/* Find line number LINE in any symtab whose name is the same as
   SYMTAB.

   If found, return the symtab that contains the linetable in which it was
   found, set *INDEX to the index in the linetable of the best entry
   found, and set *EXACT_MATCH nonzero if the value returned is an
   exact match.

   If not found, return NULL.  */

struct symtab *
find_line_symtab (struct symtab *symtab, int line, int *index, int *exact_match)
{
  int exact;

  /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
     so far seen.  */

  int best_index;
  struct linetable *best_linetable;
  struct symtab *best_symtab;

  /* First try looking it up in the given symtab.  */
  best_linetable = LINETABLE (symtab);
  best_symtab = symtab;
  best_index = find_line_common (best_linetable, line, &exact);
  if (best_index < 0 || !exact)
    {
      /* Didn't find an exact match.  So we better keep looking for
         another symtab with the same name.  In the case of xcoff,
         multiple csects for one source file (produced by IBM's FORTRAN
         compiler) produce multiple symtabs (this is unavoidable
         assuming csects can be at arbitrary places in memory and that
         the GLOBAL_BLOCK of a symtab has a begin and end address).  */

      /* BEST is the smallest linenumber > LINE so far seen,
         or 0 if none has been seen so far.
         BEST_INDEX and BEST_LINETABLE identify the item for it.  */
      int best;

      struct objfile *objfile;
      struct symtab *s;

      if (best_index >= 0)
	best = best_linetable->item[best_index].line;
      else
	best = 0;

      ALL_SYMTABS (objfile, s)
      {
	struct linetable *l;
	int ind;

	if (!STREQ (symtab->filename, s->filename))
	  continue;
	l = LINETABLE (s);
	ind = find_line_common (l, line, &exact);
	if (ind >= 0)
	  {
	    if (exact)
	      {
		best_index = ind;
		best_linetable = l;
		best_symtab = s;
		goto done;
	      }
	    if (best == 0 || l->item[ind].line < best)
	      {
		best = l->item[ind].line;
		best_index = ind;
		best_linetable = l;
		best_symtab = s;
	      }
	  }
      }
    }
done:
  if (best_index < 0)
    return NULL;

  if (index)
    *index = best_index;
  if (exact_match)
    *exact_match = exact;

  return best_symtab;
}

/* Set the PC value for a given source file and line number and return true.
   Returns zero for invalid line number (and sets the PC to 0).
   The source file is specified with a struct symtab.  */

int
find_line_pc (struct symtab *symtab, int line, CORE_ADDR *pc)
{
  struct linetable *l;
  int ind;

  *pc = 0;
  if (symtab == 0)
    return 0;

  symtab = find_line_symtab (symtab, line, &ind, NULL);
  if (symtab != NULL)
    {
      l = LINETABLE (symtab);
      *pc = l->item[ind].pc;
      return 1;
    }
  else
    return 0;
}

/* Find the range of pc values in a line.
   Store the starting pc of the line into *STARTPTR
   and the ending pc (start of next line) into *ENDPTR.
   Returns 1 to indicate success.
   Returns 0 if could not find the specified line.  */

int
find_line_pc_range (struct symtab_and_line sal, CORE_ADDR *startptr,
		    CORE_ADDR *endptr)
{
  CORE_ADDR startaddr;
  struct symtab_and_line found_sal;

  startaddr = sal.pc;
  if (startaddr == 0 && !find_line_pc (sal.symtab, sal.line, &startaddr))
    return 0;

  /* This whole function is based on address.  For example, if line 10 has
     two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
     "info line *0x123" should say the line goes from 0x100 to 0x200
     and "info line *0x355" should say the line goes from 0x300 to 0x400.
     This also insures that we never give a range like "starts at 0x134
     and ends at 0x12c".  */

  found_sal = find_pc_sect_line (startaddr, sal.section, 0);
  if (found_sal.line != sal.line)
    {
      /* The specified line (sal) has zero bytes.  */
      *startptr = found_sal.pc;
      *endptr = found_sal.pc;
    }
  else
    {
      *startptr = found_sal.pc;
      *endptr = found_sal.end;
    }
  return 1;
}

/* Given a line table and a line number, return the index into the line
   table for the pc of the nearest line whose number is >= the specified one.
   Return -1 if none is found.  The value is >= 0 if it is an index.

   Set *EXACT_MATCH nonzero if the value returned is an exact match.  */

static int
find_line_common (register struct linetable *l, register int lineno,
		  int *exact_match)
{
  register int i;
  register int len;

  /* BEST is the smallest linenumber > LINENO so far seen,
     or 0 if none has been seen so far.
     BEST_INDEX identifies the item for it.  */

  int best_index = -1;
  int best = 0;

  if (lineno <= 0)
    return -1;
  if (l == 0)
    return -1;

  len = l->nitems;
  for (i = 0; i < len; i++)
    {
      register struct linetable_entry *item = &(l->item[i]);

      if (item->line == lineno)
	{
	  /* Return the first (lowest address) entry which matches.  */
	  *exact_match = 1;
	  return i;
	}

      if (item->line > lineno && (best == 0 || item->line < best))
	{
	  best = item->line;
	  best_index = i;
	}
    }

  /* If we got here, we didn't get an exact match.  */

  *exact_match = 0;
  return best_index;
}

int
find_pc_line_pc_range (CORE_ADDR pc, CORE_ADDR *startptr, CORE_ADDR *endptr)
{
  struct symtab_and_line sal;
  sal = find_pc_line (pc, 0);
  *startptr = sal.pc;
  *endptr = sal.end;
  return sal.symtab != 0;
}

/* Given a function symbol SYM, find the symtab and line for the start
   of the function.
   If the argument FUNFIRSTLINE is nonzero, we want the first line
   of real code inside the function.  */

struct symtab_and_line
find_function_start_sal (struct symbol *sym, int funfirstline)
{
  CORE_ADDR pc;
  struct symtab_and_line sal;

  pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
  fixup_symbol_section (sym, NULL);
  if (funfirstline)
    {				/* skip "first line" of function (which is actually its prologue) */
      asection *section = SYMBOL_BFD_SECTION (sym);
      /* If function is in an unmapped overlay, use its unmapped LMA
         address, so that SKIP_PROLOGUE has something unique to work on */
      if (section_is_overlay (section) &&
	  !section_is_mapped (section))
	pc = overlay_unmapped_address (pc, section);

      pc += FUNCTION_START_OFFSET;
      pc = SKIP_PROLOGUE (pc);

      /* For overlays, map pc back into its mapped VMA range */
      pc = overlay_mapped_address (pc, section);
    }
  sal = find_pc_sect_line (pc, SYMBOL_BFD_SECTION (sym), 0);

#ifdef PROLOGUE_FIRSTLINE_OVERLAP
  /* Convex: no need to suppress code on first line, if any */
  sal.pc = pc;
#else
  /* Check if SKIP_PROLOGUE left us in mid-line, and the next
     line is still part of the same function.  */
  if (sal.pc != pc
      && BLOCK_START (SYMBOL_BLOCK_VALUE (sym)) <= sal.end
      && sal.end < BLOCK_END (SYMBOL_BLOCK_VALUE (sym)))
    {
      /* First pc of next line */
      pc = sal.end;
      /* Recalculate the line number (might not be N+1).  */
      sal = find_pc_sect_line (pc, SYMBOL_BFD_SECTION (sym), 0);
    }
  sal.pc = pc;
#endif

  return sal;
}

/* If P is of the form "operator[ \t]+..." where `...' is
   some legitimate operator text, return a pointer to the
   beginning of the substring of the operator text.
   Otherwise, return "".  */
char *
operator_chars (char *p, char **end)
{
  *end = "";
  if (strncmp (p, "operator", 8))
    return *end;
  p += 8;

  /* Don't get faked out by `operator' being part of a longer
     identifier.  */
  if (isalpha (*p) || *p == '_' || *p == '$' || *p == '\0')
    return *end;

  /* Allow some whitespace between `operator' and the operator symbol.  */
  while (*p == ' ' || *p == '\t')
    p++;

  /* Recognize 'operator TYPENAME'. */

  if (isalpha (*p) || *p == '_' || *p == '$')
    {
      register char *q = p + 1;
      while (isalnum (*q) || *q == '_' || *q == '$')
	q++;
      *end = q;
      return p;
    }

  switch (*p)
    {
    case '!':
    case '=':
    case '*':
    case '/':
    case '%':
    case '^':
      if (p[1] == '=')
	*end = p + 2;
      else
	*end = p + 1;
      return p;
    case '<':
    case '>':
    case '+':
    case '-':
    case '&':
    case '|':
      if (p[1] == '=' || p[1] == p[0])
	*end = p + 2;
      else
	*end = p + 1;
      return p;
    case '~':
    case ',':
      *end = p + 1;
      return p;
    case '(':
      if (p[1] != ')')
	error ("`operator ()' must be specified without whitespace in `()'");
      *end = p + 2;
      return p;
    case '?':
      if (p[1] != ':')
	error ("`operator ?:' must be specified without whitespace in `?:'");
      *end = p + 2;
      return p;
    case '[':
      if (p[1] != ']')
	error ("`operator []' must be specified without whitespace in `[]'");
      *end = p + 2;
      return p;
    default:
      error ("`operator %s' not supported", p);
      break;
    }
  *end = "";
  return *end;
}


/* If FILE is not already in the table of files, return zero;
   otherwise return non-zero.  Optionally add FILE to the table if ADD
   is non-zero.  If *FIRST is non-zero, forget the old table
   contents.  */
static int
filename_seen (const char *file, int add, int *first)
{
  /* Table of files seen so far.  */
  static const char **tab = NULL;
  /* Allocated size of tab in elements.
     Start with one 256-byte block (when using GNU malloc.c).
     24 is the malloc overhead when range checking is in effect.  */
  static int tab_alloc_size = (256 - 24) / sizeof (char *);
  /* Current size of tab in elements.  */
  static int tab_cur_size;
  const char **p;

  if (*first)
    {
      if (tab == NULL)
	tab = (const char **) xmalloc (tab_alloc_size * sizeof (*tab));
      tab_cur_size = 0;
    }

  /* Is FILE in tab?  */
  for (p = tab; p < tab + tab_cur_size; p++)
    if (strcmp (*p, file) == 0)
      return 1;

  /* No; maybe add it to tab.  */
  if (add)
    {
      if (tab_cur_size == tab_alloc_size)
	{
	  tab_alloc_size *= 2;
	  tab = (const char **) xrealloc ((char *) tab,
					  tab_alloc_size * sizeof (*tab));
	}
      tab[tab_cur_size++] = file;
    }

  return 0;
}

/* Slave routine for sources_info.  Force line breaks at ,'s.
   NAME is the name to print and *FIRST is nonzero if this is the first
   name printed.  Set *FIRST to zero.  */
static void
output_source_filename (char *name, int *first)
{
  /* Since a single source file can result in several partial symbol
     tables, we need to avoid printing it more than once.  Note: if
     some of the psymtabs are read in and some are not, it gets
     printed both under "Source files for which symbols have been
     read" and "Source files for which symbols will be read in on
     demand".  I consider this a reasonable way to deal with the
     situation.  I'm not sure whether this can also happen for
     symtabs; it doesn't hurt to check.  */

  /* Was NAME already seen?  */
  if (filename_seen (name, 1, first))
    {
      /* Yes; don't print it again.  */
      return;
    }
  /* No; print it and reset *FIRST.  */
  if (*first)
    {
      *first = 0;
    }
  else
    {
      printf_filtered (", ");
    }

  wrap_here ("");
  fputs_filtered (name, gdb_stdout);
}

static void
sources_info (char *ignore, int from_tty)
{
  register struct symtab *s;
  register struct partial_symtab *ps;
  register struct objfile *objfile;
  int first;

  if (!have_full_symbols () && !have_partial_symbols ())
    {
      error ("No symbol table is loaded.  Use the \"file\" command.");
    }

  printf_filtered ("Source files for which symbols have been read in:\n\n");

  first = 1;
  ALL_SYMTABS (objfile, s)
  {
    output_source_filename (s->filename, &first);
  }
  printf_filtered ("\n\n");

  printf_filtered ("Source files for which symbols will be read in on demand:\n\n");

  first = 1;
  ALL_PSYMTABS (objfile, ps)
  {
    if (!ps->readin)
      {
	output_source_filename (ps->filename, &first);
      }
  }
  printf_filtered ("\n");
}

static int
file_matches (char *file, char *files[], int nfiles)
{
  int i;

  if (file != NULL && nfiles != 0)
    {
      for (i = 0; i < nfiles; i++)
	{
	  if (strcmp (files[i], lbasename (file)) == 0)
	    return 1;
	}
    }
  else if (nfiles == 0)
    return 1;
  return 0;
}

/* Free any memory associated with a search. */
void
free_search_symbols (struct symbol_search *symbols)
{
  struct symbol_search *p;
  struct symbol_search *next;

  for (p = symbols; p != NULL; p = next)
    {
      next = p->next;
      xfree (p);
    }
}

static void
do_free_search_symbols_cleanup (void *symbols)
{
  free_search_symbols (symbols);
}

struct cleanup *
make_cleanup_free_search_symbols (struct symbol_search *symbols)
{
  return make_cleanup (do_free_search_symbols_cleanup, symbols);
}


/* Search the symbol table for matches to the regular expression REGEXP,
   returning the results in *MATCHES.

   Only symbols of KIND are searched:
   FUNCTIONS_NAMESPACE - search all functions
   TYPES_NAMESPACE     - search all type names
   METHODS_NAMESPACE   - search all methods NOT IMPLEMENTED
   VARIABLES_NAMESPACE - search all symbols, excluding functions, type names,
   and constants (enums)

   free_search_symbols should be called when *MATCHES is no longer needed.
 */
void
search_symbols (char *regexp, namespace_enum kind, int nfiles, char *files[],
		struct symbol_search **matches)
{
  register struct symtab *s;
  register struct partial_symtab *ps;
  register struct blockvector *bv;
  struct blockvector *prev_bv = 0;
  register struct block *b;
  register int i = 0;
  register int j;
  register struct symbol *sym;
  struct partial_symbol **psym;
  struct objfile *objfile;
  struct minimal_symbol *msymbol;
  char *val;
  int found_misc = 0;
  static enum minimal_symbol_type types[]
  =
  {mst_data, mst_text, mst_abs, mst_unknown};
  static enum minimal_symbol_type types2[]
  =
  {mst_bss, mst_file_text, mst_abs, mst_unknown};
  static enum minimal_symbol_type types3[]
  =
  {mst_file_data, mst_solib_trampoline, mst_abs, mst_unknown};
  static enum minimal_symbol_type types4[]
  =
  {mst_file_bss, mst_text, mst_abs, mst_unknown};
  enum minimal_symbol_type ourtype;
  enum minimal_symbol_type ourtype2;
  enum minimal_symbol_type ourtype3;
  enum minimal_symbol_type ourtype4;
  struct symbol_search *sr;
  struct symbol_search *psr;
  struct symbol_search *tail;
  struct cleanup *old_chain = NULL;

  if (kind < VARIABLES_NAMESPACE)
    error ("must search on specific namespace");

  ourtype = types[(int) (kind - VARIABLES_NAMESPACE)];
  ourtype2 = types2[(int) (kind - VARIABLES_NAMESPACE)];
  ourtype3 = types3[(int) (kind - VARIABLES_NAMESPACE)];
  ourtype4 = types4[(int) (kind - VARIABLES_NAMESPACE)];

  sr = *matches = NULL;
  tail = NULL;

  if (regexp != NULL)
    {
      /* Make sure spacing is right for C++ operators.
         This is just a courtesy to make the matching less sensitive
         to how many spaces the user leaves between 'operator'
         and <TYPENAME> or <OPERATOR>. */
      char *opend;
      char *opname = operator_chars (regexp, &opend);
      if (*opname)
	{
	  int fix = -1;		/* -1 means ok; otherwise number of spaces needed. */
	  if (isalpha (*opname) || *opname == '_' || *opname == '$')
	    {
	      /* There should 1 space between 'operator' and 'TYPENAME'. */
	      if (opname[-1] != ' ' || opname[-2] == ' ')
		fix = 1;
	    }
	  else
	    {
	      /* There should 0 spaces between 'operator' and 'OPERATOR'. */
	      if (opname[-1] == ' ')
		fix = 0;
	    }
	  /* If wrong number of spaces, fix it. */
	  if (fix >= 0)
	    {
	      char *tmp = (char *) alloca (opend - opname + 10);
	      sprintf (tmp, "operator%.*s%s", fix, " ", opname);
	      regexp = tmp;
	    }
	}

      if (0 != (val = re_comp (regexp)))
	error ("Invalid regexp (%s): %s", val, regexp);
    }

  /* Search through the partial symtabs *first* for all symbols
     matching the regexp.  That way we don't have to reproduce all of
     the machinery below. */

  ALL_PSYMTABS (objfile, ps)
  {
    struct partial_symbol **bound, **gbound, **sbound;
    int keep_going = 1;

    if (ps->readin)
      continue;

    gbound = objfile->global_psymbols.list + ps->globals_offset + ps->n_global_syms;
    sbound = objfile->static_psymbols.list + ps->statics_offset + ps->n_static_syms;
    bound = gbound;

    /* Go through all of the symbols stored in a partial
       symtab in one loop. */
    psym = objfile->global_psymbols.list + ps->globals_offset;
    while (keep_going)
      {
	if (psym >= bound)
	  {
	    if (bound == gbound && ps->n_static_syms != 0)
	      {
		psym = objfile->static_psymbols.list + ps->statics_offset;
		bound = sbound;
	      }
	    else
	      keep_going = 0;
	    continue;
	  }
	else
	  {
	    QUIT;

	    /* If it would match (logic taken from loop below)
	       load the file and go on to the next one */
	    if (file_matches (ps->filename, files, nfiles)
		&& ((regexp == NULL || SYMBOL_MATCHES_REGEXP (*psym))
		    && ((kind == VARIABLES_NAMESPACE && SYMBOL_CLASS (*psym) != LOC_TYPEDEF
			 && SYMBOL_CLASS (*psym) != LOC_BLOCK)
			|| (kind == FUNCTIONS_NAMESPACE && SYMBOL_CLASS (*psym) == LOC_BLOCK)
			|| (kind == TYPES_NAMESPACE && SYMBOL_CLASS (*psym) == LOC_TYPEDEF)
			|| (kind == METHODS_NAMESPACE && SYMBOL_CLASS (*psym) == LOC_BLOCK))))
	      {
		PSYMTAB_TO_SYMTAB (ps);
		keep_going = 0;
	      }
	  }
	psym++;
      }
  }

  /* Here, we search through the minimal symbol tables for functions
     and variables that match, and force their symbols to be read.
     This is in particular necessary for demangled variable names,
     which are no longer put into the partial symbol tables.
     The symbol will then be found during the scan of symtabs below.

     For functions, find_pc_symtab should succeed if we have debug info
     for the function, for variables we have to call lookup_symbol
     to determine if the variable has debug info.
     If the lookup fails, set found_misc so that we will rescan to print
     any matching symbols without debug info.
   */

  if (nfiles == 0 && (kind == VARIABLES_NAMESPACE || kind == FUNCTIONS_NAMESPACE))
    {
      ALL_MSYMBOLS (objfile, msymbol)
      {
	if (MSYMBOL_TYPE (msymbol) == ourtype ||
	    MSYMBOL_TYPE (msymbol) == ourtype2 ||
	    MSYMBOL_TYPE (msymbol) == ourtype3 ||
	    MSYMBOL_TYPE (msymbol) == ourtype4)
	  {
	    if (regexp == NULL || SYMBOL_MATCHES_REGEXP (msymbol))
	      {
		if (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)))
		  {
		    if (kind == FUNCTIONS_NAMESPACE
			|| lookup_symbol (SYMBOL_NAME (msymbol),
					  (struct block *) NULL,
					  VAR_NAMESPACE,
					0, (struct symtab **) NULL) == NULL)
		      found_misc = 1;
		  }
	      }
	  }
      }
    }

  ALL_SYMTABS (objfile, s)
  {
    bv = BLOCKVECTOR (s);
    /* Often many files share a blockvector.
       Scan each blockvector only once so that
       we don't get every symbol many times.
       It happens that the first symtab in the list
       for any given blockvector is the main file.  */
    if (bv != prev_bv)
      for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++)
	{
	  b = BLOCKVECTOR_BLOCK (bv, i);
	  /* Skip the sort if this block is always sorted.  */
	  if (!BLOCK_SHOULD_SORT (b))
	    sort_block_syms (b);
	  for (j = 0; j < BLOCK_NSYMS (b); j++)
	    {
	      QUIT;
	      sym = BLOCK_SYM (b, j);
	      if (file_matches (s->filename, files, nfiles)
		  && ((regexp == NULL || SYMBOL_MATCHES_REGEXP (sym))
		      && ((kind == VARIABLES_NAMESPACE && SYMBOL_CLASS (sym) != LOC_TYPEDEF
			   && SYMBOL_CLASS (sym) != LOC_BLOCK
			   && SYMBOL_CLASS (sym) != LOC_CONST)
			  || (kind == FUNCTIONS_NAMESPACE && SYMBOL_CLASS (sym) == LOC_BLOCK)
			  || (kind == TYPES_NAMESPACE && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
			  || (kind == METHODS_NAMESPACE && SYMBOL_CLASS (sym) == LOC_BLOCK))))
		{
		  /* match */
		  psr = (struct symbol_search *) xmalloc (sizeof (struct symbol_search));
		  psr->block = i;
		  psr->symtab = s;
		  psr->symbol = sym;
		  psr->msymbol = NULL;
		  psr->next = NULL;
		  if (tail == NULL)
		    {
		      sr = psr;
		      old_chain = make_cleanup_free_search_symbols (sr);
		    }
		  else
		    tail->next = psr;
		  tail = psr;
		}
	    }
	}
    prev_bv = bv;
  }

  /* If there are no eyes, avoid all contact.  I mean, if there are
     no debug symbols, then print directly from the msymbol_vector.  */

  if (found_misc || kind != FUNCTIONS_NAMESPACE)
    {
      ALL_MSYMBOLS (objfile, msymbol)
      {
	if (MSYMBOL_TYPE (msymbol) == ourtype ||
	    MSYMBOL_TYPE (msymbol) == ourtype2 ||
	    MSYMBOL_TYPE (msymbol) == ourtype3 ||
	    MSYMBOL_TYPE (msymbol) == ourtype4)
	  {
	    if (regexp == NULL || SYMBOL_MATCHES_REGEXP (msymbol))
	      {
		/* Functions:  Look up by address. */
		if (kind != FUNCTIONS_NAMESPACE ||
		    (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol))))
		  {
		    /* Variables/Absolutes:  Look up by name */
		    if (lookup_symbol (SYMBOL_NAME (msymbol),
				       (struct block *) NULL, VAR_NAMESPACE,
				       0, (struct symtab **) NULL) == NULL)
		      {
			/* match */
			psr = (struct symbol_search *) xmalloc (sizeof (struct symbol_search));
			psr->block = i;
			psr->msymbol = msymbol;
			psr->symtab = NULL;
			psr->symbol = NULL;
			psr->next = NULL;
			if (tail == NULL)
			  {
			    sr = psr;
			    old_chain = make_cleanup_free_search_symbols (sr);
			  }
			else
			  tail->next = psr;
			tail = psr;
		      }
		  }
	      }
	  }
      }
    }

  *matches = sr;
  if (sr != NULL)
    discard_cleanups (old_chain);
}

/* Helper function for symtab_symbol_info, this function uses
   the data returned from search_symbols() to print information
   regarding the match to gdb_stdout.
 */
static void
print_symbol_info (namespace_enum kind, struct symtab *s, struct symbol *sym,
		   int block, char *last)
{
  if (last == NULL || strcmp (last, s->filename) != 0)
    {
      fputs_filtered ("\nFile ", gdb_stdout);
      fputs_filtered (s->filename, gdb_stdout);
      fputs_filtered (":\n", gdb_stdout);
    }

  if (kind != TYPES_NAMESPACE && block == STATIC_BLOCK)
    printf_filtered ("static ");

  /* Typedef that is not a C++ class */
  if (kind == TYPES_NAMESPACE
      && SYMBOL_NAMESPACE (sym) != STRUCT_NAMESPACE)
    typedef_print (SYMBOL_TYPE (sym), sym, gdb_stdout);
  /* variable, func, or typedef-that-is-c++-class */
  else if (kind < TYPES_NAMESPACE ||
	   (kind == TYPES_NAMESPACE &&
	    SYMBOL_NAMESPACE (sym) == STRUCT_NAMESPACE))
    {
      type_print (SYMBOL_TYPE (sym),
		  (SYMBOL_CLASS (sym) == LOC_TYPEDEF
		   ? "" : SYMBOL_SOURCE_NAME (sym)),
		  gdb_stdout, 0);

      printf_filtered (";\n");
    }
  else
    {
#if 0
      /* Tiemann says: "info methods was never implemented."  */
      char *demangled_name;
      c_type_print_base (TYPE_FN_FIELD_TYPE (t, block),
			 gdb_stdout, 0, 0);
      c_type_print_varspec_prefix (TYPE_FN_FIELD_TYPE (t, block),
				   gdb_stdout, 0);
      if (TYPE_FN_FIELD_STUB (t, block))
	check_stub_method (TYPE_DOMAIN_TYPE (type), j, block);
      demangled_name =
	cplus_demangle (TYPE_FN_FIELD_PHYSNAME (t, block),
			DMGL_ANSI | DMGL_PARAMS);
      if (demangled_name == NULL)
	fprintf_filtered (stream, "<badly mangled name %s>",
			  TYPE_FN_FIELD_PHYSNAME (t, block));
      else
	{
	  fputs_filtered (demangled_name, stream);
	  xfree (demangled_name);
	}
#endif
    }
}

/* This help function for symtab_symbol_info() prints information
   for non-debugging symbols to gdb_stdout.
 */
static void
print_msymbol_info (struct minimal_symbol *msymbol)
{
  char *tmp;

  if (TARGET_ADDR_BIT <= 32)
    tmp = longest_local_hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol)
					   & (CORE_ADDR) 0xffffffff,
					   "08l");
  else
    tmp = longest_local_hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol),
					   "016l");
  printf_filtered ("%s  %s\n",
		   tmp, SYMBOL_SOURCE_NAME (msymbol));
}

/* This is the guts of the commands "info functions", "info types", and
   "info variables". It calls search_symbols to find all matches and then
   print_[m]symbol_info to print out some useful information about the
   matches.
 */
static void
symtab_symbol_info (char *regexp, namespace_enum kind, int from_tty)
{
  static char *classnames[]
  =
  {"variable", "function", "type", "method"};
  struct symbol_search *symbols;
  struct symbol_search *p;
  struct cleanup *old_chain;
  char *last_filename = NULL;
  int first = 1;

  /* must make sure that if we're interrupted, symbols gets freed */
  search_symbols (regexp, kind, 0, (char **) NULL, &symbols);
  old_chain = make_cleanup_free_search_symbols (symbols);

  printf_filtered (regexp
		   ? "All %ss matching regular expression \"%s\":\n"
		   : "All defined %ss:\n",
		   classnames[(int) (kind - VARIABLES_NAMESPACE)], regexp);

  for (p = symbols; p != NULL; p = p->next)
    {
      QUIT;

      if (p->msymbol != NULL)
	{
	  if (first)
	    {
	      printf_filtered ("\nNon-debugging symbols:\n");
	      first = 0;
	    }
	  print_msymbol_info (p->msymbol);
	}
      else
	{
	  print_symbol_info (kind,
			     p->symtab,
			     p->symbol,
			     p->block,
			     last_filename);
	  last_filename = p->symtab->filename;
	}
    }

  do_cleanups (old_chain);
}

static void
variables_info (char *regexp, int from_tty)
{
  symtab_symbol_info (regexp, VARIABLES_NAMESPACE, from_tty);
}

static void
functions_info (char *regexp, int from_tty)
{
  symtab_symbol_info (regexp, FUNCTIONS_NAMESPACE, from_tty);
}


static void
types_info (char *regexp, int from_tty)
{
  symtab_symbol_info (regexp, TYPES_NAMESPACE, from_tty);
}

#if 0
/* Tiemann says: "info methods was never implemented."  */
static void
methods_info (char *regexp)
{
  symtab_symbol_info (regexp, METHODS_NAMESPACE, 0, from_tty);
}
#endif /* 0 */

/* Breakpoint all functions matching regular expression. */
#ifdef UI_OUT
void
rbreak_command_wrapper (char *regexp, int from_tty)
{
  rbreak_command (regexp, from_tty);
}
#endif
static void
rbreak_command (char *regexp, int from_tty)
{
  struct symbol_search *ss;
  struct symbol_search *p;
  struct cleanup *old_chain;

  search_symbols (regexp, FUNCTIONS_NAMESPACE, 0, (char **) NULL, &ss);
  old_chain = make_cleanup_free_search_symbols (ss);

  for (p = ss; p != NULL; p = p->next)
    {
      if (p->msymbol == NULL)
	{
	  char *string = (char *) alloca (strlen (p->symtab->filename)
					  + strlen (SYMBOL_NAME (p->symbol))
					  + 4);
	  strcpy (string, p->symtab->filename);
	  strcat (string, ":'");
	  strcat (string, SYMBOL_NAME (p->symbol));
	  strcat (string, "'");
	  break_command (string, from_tty);
	  print_symbol_info (FUNCTIONS_NAMESPACE,
			     p->symtab,
			     p->symbol,
			     p->block,
			     p->symtab->filename);
	}
      else
	{
	  break_command (SYMBOL_NAME (p->msymbol), from_tty);
	  printf_filtered ("<function, no debug info> %s;\n",
			   SYMBOL_SOURCE_NAME (p->msymbol));
	}
    }

  do_cleanups (old_chain);
}


/* Return Nonzero if block a is lexically nested within block b,
   or if a and b have the same pc range.
   Return zero otherwise. */
int
contained_in (struct block *a, struct block *b)
{
  if (!a || !b)
    return 0;
  return BLOCK_START (a) >= BLOCK_START (b)
    && BLOCK_END (a) <= BLOCK_END (b);
}


/* Helper routine for make_symbol_completion_list.  */

static int return_val_size;
static int return_val_index;
static char **return_val;

#define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
  do { \
    if (SYMBOL_DEMANGLED_NAME (symbol) != NULL) \
      /* Put only the mangled name on the list.  */ \
      /* Advantage:  "b foo<TAB>" completes to "b foo(int, int)" */ \
      /* Disadvantage:  "b foo__i<TAB>" doesn't complete.  */ \
      completion_list_add_name \
	(SYMBOL_DEMANGLED_NAME (symbol), (sym_text), (len), (text), (word)); \
    else \
      completion_list_add_name \
	(SYMBOL_NAME (symbol), (sym_text), (len), (text), (word)); \
  } while (0)

/*  Test to see if the symbol specified by SYMNAME (which is already
   demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
   characters.  If so, add it to the current completion list. */

static void
completion_list_add_name (char *symname, char *sym_text, int sym_text_len,
			  char *text, char *word)
{
  int newsize;
  int i;

  /* clip symbols that cannot match */

  if (strncmp (symname, sym_text, sym_text_len) != 0)
    {
      return;
    }

  /* We have a match for a completion, so add SYMNAME to the current list
     of matches. Note that the name is moved to freshly malloc'd space. */

  {
    char *new;
    if (word == sym_text)
      {
	new = xmalloc (strlen (symname) + 5);
	strcpy (new, symname);
      }
    else if (word > sym_text)
      {
	/* Return some portion of symname.  */
	new = xmalloc (strlen (symname) + 5);
	strcpy (new, symname + (word - sym_text));
      }
    else
      {
	/* Return some of SYM_TEXT plus symname.  */
	new = xmalloc (strlen (symname) + (sym_text - word) + 5);
	strncpy (new, word, sym_text - word);
	new[sym_text - word] = '\0';
	strcat (new, symname);
      }

    if (return_val_index + 3 > return_val_size)
      {
	newsize = (return_val_size *= 2) * sizeof (char *);
	return_val = (char **) xrealloc ((char *) return_val, newsize);
      }
    return_val[return_val_index++] = new;
    return_val[return_val_index] = NULL;
  }
}

/* Return a NULL terminated array of all symbols (regardless of class)
   which begin by matching TEXT.  If the answer is no symbols, then
   the return value is an array which contains only a NULL pointer.

   Problem: All of the symbols have to be copied because readline frees them.
   I'm not going to worry about this; hopefully there won't be that many.  */

char **
make_symbol_completion_list (char *text, char *word)
{
  register struct symbol *sym;
  register struct symtab *s;
  register struct partial_symtab *ps;
  register struct minimal_symbol *msymbol;
  register struct objfile *objfile;
  register struct block *b, *surrounding_static_block = 0;
  register int i, j;
  struct partial_symbol **psym;
  /* The symbol we are completing on.  Points in same buffer as text.  */
  char *sym_text;
  /* Length of sym_text.  */
  int sym_text_len;

  /* Now look for the symbol we are supposed to complete on.
     FIXME: This should be language-specific.  */
  {
    char *p;
    char quote_found;
    char *quote_pos = NULL;

    /* First see if this is a quoted string.  */
    quote_found = '\0';
    for (p = text; *p != '\0'; ++p)
      {
	if (quote_found != '\0')
	  {
	    if (*p == quote_found)
	      /* Found close quote.  */
	      quote_found = '\0';
	    else if (*p == '\\' && p[1] == quote_found)
	      /* A backslash followed by the quote character
	         doesn't end the string.  */
	      ++p;
	  }
	else if (*p == '\'' || *p == '"')
	  {
	    quote_found = *p;
	    quote_pos = p;
	  }
      }
    if (quote_found == '\'')
      /* A string within single quotes can be a symbol, so complete on it.  */
      sym_text = quote_pos + 1;
    else if (quote_found == '"')
      /* A double-quoted string is never a symbol, nor does it make sense
         to complete it any other way.  */
      {
	return_val = (char **) xmalloc (sizeof (char *));
	return_val[0] = NULL;
	return return_val;
      }
    else
      {
	/* It is not a quoted string.  Break it based on the characters
	   which are in symbols.  */
	while (p > text)
	  {
	    if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0')
	      --p;
	    else
	      break;
	  }
	sym_text = p;
      }
  }

  sym_text_len = strlen (sym_text);

  return_val_size = 100;
  return_val_index = 0;
  return_val = (char **) xmalloc ((return_val_size + 1) * sizeof (char *));
  return_val[0] = NULL;

  /* Look through the partial symtabs for all symbols which begin
     by matching SYM_TEXT.  Add each one that you find to the list.  */

  ALL_PSYMTABS (objfile, ps)
  {
    /* If the psymtab's been read in we'll get it when we search
       through the blockvector.  */
    if (ps->readin)
      continue;

    for (psym = objfile->global_psymbols.list + ps->globals_offset;
	 psym < (objfile->global_psymbols.list + ps->globals_offset
		 + ps->n_global_syms);
	 psym++)
      {
	/* If interrupted, then quit. */
	QUIT;
	COMPLETION_LIST_ADD_SYMBOL (*psym, sym_text, sym_text_len, text, word);
      }

    for (psym = objfile->static_psymbols.list + ps->statics_offset;
	 psym < (objfile->static_psymbols.list + ps->statics_offset
		 + ps->n_static_syms);
	 psym++)
      {
	QUIT;
	COMPLETION_LIST_ADD_SYMBOL (*psym, sym_text, sym_text_len, text, word);
      }
  }

  /* At this point scan through the misc symbol vectors and add each
     symbol you find to the list.  Eventually we want to ignore
     anything that isn't a text symbol (everything else will be
     handled by the psymtab code above).  */

  ALL_MSYMBOLS (objfile, msymbol)
  {
    QUIT;
    COMPLETION_LIST_ADD_SYMBOL (msymbol, sym_text, sym_text_len, text, word);
  }

  /* Search upwards from currently selected frame (so that we can
     complete on local vars.  */

  for (b = get_selected_block (); b != NULL; b = BLOCK_SUPERBLOCK (b))
    {
      if (!BLOCK_SUPERBLOCK (b))
	{
	  surrounding_static_block = b;		/* For elmin of dups */
	}

      /* Also catch fields of types defined in this places which match our
         text string.  Only complete on types visible from current context. */

      for (i = 0; i < BLOCK_NSYMS (b); i++)
	{
	  sym = BLOCK_SYM (b, i);
	  COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
	  if (SYMBOL_CLASS (sym) == LOC_TYPEDEF)
	    {
	      struct type *t = SYMBOL_TYPE (sym);
	      enum type_code c = TYPE_CODE (t);

	      if (c == TYPE_CODE_UNION || c == TYPE_CODE_STRUCT)
		{
		  for (j = TYPE_N_BASECLASSES (t); j < TYPE_NFIELDS (t); j++)
		    {
		      if (TYPE_FIELD_NAME (t, j))
			{
			  completion_list_add_name (TYPE_FIELD_NAME (t, j),
					sym_text, sym_text_len, text, word);
			}
		    }
		}
	    }
	}
    }

  /* Go through the symtabs and check the externs and statics for
     symbols which match.  */

  ALL_SYMTABS (objfile, s)
  {
    QUIT;
    b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
    for (i = 0; i < BLOCK_NSYMS (b); i++)
      {
	sym = BLOCK_SYM (b, i);
	COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
      }
  }

  ALL_SYMTABS (objfile, s)
  {
    QUIT;
    b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
    /* Don't do this block twice.  */
    if (b == surrounding_static_block)
      continue;
    for (i = 0; i < BLOCK_NSYMS (b); i++)
      {
	sym = BLOCK_SYM (b, i);
	COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
      }
  }

  return (return_val);
}

/* Like make_symbol_completion_list, but returns a list of symbols
   defined in a source file FILE.  */

char **
make_file_symbol_completion_list (char *text, char *word, char *srcfile)
{
  register struct symbol *sym;
  register struct symtab *s;
  register struct block *b;
  register int i;
  /* The symbol we are completing on.  Points in same buffer as text.  */
  char *sym_text;
  /* Length of sym_text.  */
  int sym_text_len;

  /* Now look for the symbol we are supposed to complete on.
     FIXME: This should be language-specific.  */
  {
    char *p;
    char quote_found;
    char *quote_pos = NULL;

    /* First see if this is a quoted string.  */
    quote_found = '\0';
    for (p = text; *p != '\0'; ++p)
      {
	if (quote_found != '\0')
	  {
	    if (*p == quote_found)
	      /* Found close quote.  */
	      quote_found = '\0';
	    else if (*p == '\\' && p[1] == quote_found)
	      /* A backslash followed by the quote character
	         doesn't end the string.  */
	      ++p;
	  }
	else if (*p == '\'' || *p == '"')
	  {
	    quote_found = *p;
	    quote_pos = p;
	  }
      }
    if (quote_found == '\'')
      /* A string within single quotes can be a symbol, so complete on it.  */
      sym_text = quote_pos + 1;
    else if (quote_found == '"')
      /* A double-quoted string is never a symbol, nor does it make sense
         to complete it any other way.  */
      {
	return_val = (char **) xmalloc (sizeof (char *));
	return_val[0] = NULL;
	return return_val;
      }
    else
      {
	/* It is not a quoted string.  Break it based on the characters
	   which are in symbols.  */
	while (p > text)
	  {
	    if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0')
	      --p;
	    else
	      break;
	  }
	sym_text = p;
      }
  }

  sym_text_len = strlen (sym_text);

  return_val_size = 10;
  return_val_index = 0;
  return_val = (char **) xmalloc ((return_val_size + 1) * sizeof (char *));
  return_val[0] = NULL;

  /* Find the symtab for SRCFILE (this loads it if it was not yet read
     in).  */
  s = lookup_symtab (srcfile);
  if (s == NULL)
    {
      /* Maybe they typed the file with leading directories, while the
	 symbol tables record only its basename.  */
      const char *tail = lbasename (srcfile);

      if (tail > srcfile)
	s = lookup_symtab (tail);
    }

  /* If we have no symtab for that file, return an empty list.  */
  if (s == NULL)
    return (return_val);

  /* Go through this symtab and check the externs and statics for
     symbols which match.  */

  b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
  for (i = 0; i < BLOCK_NSYMS (b); i++)
    {
      sym = BLOCK_SYM (b, i);
      COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
    }

  b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
  for (i = 0; i < BLOCK_NSYMS (b); i++)
    {
      sym = BLOCK_SYM (b, i);
      COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
    }

  return (return_val);
}

/* A helper function for make_source_files_completion_list.  It adds
   another file name to a list of possible completions, growing the
   list as necessary.  */

static void
add_filename_to_list (const char *fname, char *text, char *word,
		      char ***list, int *list_used, int *list_alloced)
{
  char *new;
  size_t fnlen = strlen (fname);

  if (*list_used + 1 >= *list_alloced)
    {
      *list_alloced *= 2;
      *list = (char **) xrealloc ((char *) *list,
				  *list_alloced * sizeof (char *));
    }

  if (word == text)
    {
      /* Return exactly fname.  */
      new = xmalloc (fnlen + 5);
      strcpy (new, fname);
    }
  else if (word > text)
    {
      /* Return some portion of fname.  */
      new = xmalloc (fnlen + 5);
      strcpy (new, fname + (word - text));
    }
  else
    {
      /* Return some of TEXT plus fname.  */
      new = xmalloc (fnlen + (text - word) + 5);
      strncpy (new, word, text - word);
      new[text - word] = '\0';
      strcat (new, fname);
    }
  (*list)[*list_used] = new;
  (*list)[++*list_used] = NULL;
}

static int
not_interesting_fname (const char *fname)
{
  static const char *illegal_aliens[] = {
    "_globals_",	/* inserted by coff_symtab_read */
    NULL
  };
  int i;

  for (i = 0; illegal_aliens[i]; i++)
    {
      if (strcmp (fname, illegal_aliens[i]) == 0)
	return 1;
    }
  return 0;
}

/* Return a NULL terminated array of all source files whose names
   begin with matching TEXT.  The file names are looked up in the
   symbol tables of this program.  If the answer is no matchess, then
   the return value is an array which contains only a NULL pointer.  */

char **
make_source_files_completion_list (char *text, char *word)
{
  register struct symtab *s;
  register struct partial_symtab *ps;
  register struct objfile *objfile;
  int first = 1;
  int list_alloced = 1;
  int list_used = 0;
  size_t text_len = strlen (text);
  char **list = (char **) xmalloc (list_alloced * sizeof (char *));
  const char *base_name;

  list[0] = NULL;

  if (!have_full_symbols () && !have_partial_symbols ())
    return list;

  ALL_SYMTABS (objfile, s)
    {
      if (not_interesting_fname (s->filename))
	continue;
      if (!filename_seen (s->filename, 1, &first)
#if HAVE_DOS_BASED_FILE_SYSTEM
	  && strncasecmp (s->filename, text, text_len) == 0
#else
	  && strncmp (s->filename, text, text_len) == 0
#endif
	  )
	{
	  /* This file matches for a completion; add it to the current
	     list of matches.  */
	  add_filename_to_list (s->filename, text, word,
				&list, &list_used, &list_alloced);
	}
      else
	{
	  /* NOTE: We allow the user to type a base name when the
	     debug info records leading directories, but not the other
	     way around.  This is what subroutines of breakpoint
	     command do when they parse file names.  */
	  base_name = lbasename (s->filename);
	  if (base_name != s->filename
	      && !filename_seen (base_name, 1, &first)
#if HAVE_DOS_BASED_FILE_SYSTEM
	      && strncasecmp (base_name, text, text_len) == 0
#else
	      && strncmp (base_name, text, text_len) == 0
#endif
	      )
	    add_filename_to_list (base_name, text, word,
				  &list, &list_used, &list_alloced);
	}
    }

  ALL_PSYMTABS (objfile, ps)
    {
      if (not_interesting_fname (ps->filename))
	continue;
      if (!ps->readin)
	{
	  if (!filename_seen (ps->filename, 1, &first)
#if HAVE_DOS_BASED_FILE_SYSTEM
	      && strncasecmp (ps->filename, text, text_len) == 0
#else
	      && strncmp (ps->filename, text, text_len) == 0
#endif
	      )
	    {
	      /* This file matches for a completion; add it to the
		 current list of matches.  */
	      add_filename_to_list (ps->filename, text, word,
				    &list, &list_used, &list_alloced);

	    }
	  else
	    {
	      base_name = lbasename (ps->filename);
	      if (base_name != ps->filename
		  && !filename_seen (base_name, 1, &first)
#if HAVE_DOS_BASED_FILE_SYSTEM
		  && strncasecmp (base_name, text, text_len) == 0
#else
		  && strncmp (base_name, text, text_len) == 0
#endif
		  )
		add_filename_to_list (base_name, text, word,
				      &list, &list_used, &list_alloced);
	    }
	}
    }

  return list;
}

/* Determine if PC is in the prologue of a function.  The prologue is the area
   between the first instruction of a function, and the first executable line.
   Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.

   If non-zero, func_start is where we think the prologue starts, possibly
   by previous examination of symbol table information.
 */

int
in_prologue (CORE_ADDR pc, CORE_ADDR func_start)
{
  struct symtab_and_line sal;
  CORE_ADDR func_addr, func_end;

  /* We have several sources of information we can consult to figure
     this out.
     - Compilers usually emit line number info that marks the prologue
       as its own "source line".  So the ending address of that "line"
       is the end of the prologue.  If available, this is the most
       reliable method.
     - The minimal symbols and partial symbols, which can usually tell
       us the starting and ending addresses of a function.
     - If we know the function's start address, we can call the
       architecture-defined SKIP_PROLOGUE function to analyze the
       instruction stream and guess where the prologue ends.
     - Our `func_start' argument; if non-zero, this is the caller's
       best guess as to the function's entry point.  At the time of
       this writing, handle_inferior_event doesn't get this right, so
       it should be our last resort.  */

  /* Consult the partial symbol table, to find which function
     the PC is in.  */
  if (! find_pc_partial_function (pc, NULL, &func_addr, &func_end))
    {
      CORE_ADDR prologue_end;

      /* We don't even have minsym information, so fall back to using
         func_start, if given.  */
      if (! func_start)
	return 1;		/* We *might* be in a prologue.  */

      prologue_end = SKIP_PROLOGUE (func_start);

      return func_start <= pc && pc < prologue_end;
    }

  /* If we have line number information for the function, that's
     usually pretty reliable.  */
  sal = find_pc_line (func_addr, 0);

  /* Now sal describes the source line at the function's entry point,
     which (by convention) is the prologue.  The end of that "line",
     sal.end, is the end of the prologue.

     Note that, for functions whose source code is all on a single
     line, the line number information doesn't always end up this way.
     So we must verify that our purported end-of-prologue address is
     *within* the function, not at its start or end.  */
  if (sal.line == 0
      || sal.end <= func_addr
      || func_end <= sal.end)
    {
      /* We don't have any good line number info, so use the minsym
	 information, together with the architecture-specific prologue
	 scanning code.  */
      CORE_ADDR prologue_end = SKIP_PROLOGUE (func_addr);

      return func_addr <= pc && pc < prologue_end;
    }

  /* We have line number info, and it looks good.  */
  return func_addr <= pc && pc < sal.end;
}


/* Begin overload resolution functions */
/* Helper routine for make_symbol_completion_list.  */

static int sym_return_val_size;
static int sym_return_val_index;
static struct symbol **sym_return_val;

/*  Test to see if the symbol specified by SYMNAME (which is already
   demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
   characters.  If so, add it to the current completion list. */

static void
overload_list_add_symbol (struct symbol *sym, char *oload_name)
{
  int newsize;
  int i;

  /* Get the demangled name without parameters */
  char *sym_name = cplus_demangle (SYMBOL_NAME (sym), DMGL_ARM | DMGL_ANSI);
  if (!sym_name)
    {
      sym_name = (char *) xmalloc (strlen (SYMBOL_NAME (sym)) + 1);
      strcpy (sym_name, SYMBOL_NAME (sym));
    }

  /* skip symbols that cannot match */
  if (strcmp (sym_name, oload_name) != 0)
    {
      xfree (sym_name);
      return;
    }

  /* If there is no type information, we can't do anything, so skip */
  if (SYMBOL_TYPE (sym) == NULL)
    return;

  /* skip any symbols that we've already considered. */
  for (i = 0; i < sym_return_val_index; ++i)
    if (!strcmp (SYMBOL_NAME (sym), SYMBOL_NAME (sym_return_val[i])))
      return;

  /* We have a match for an overload instance, so add SYM to the current list
   * of overload instances */
  if (sym_return_val_index + 3 > sym_return_val_size)
    {
      newsize = (sym_return_val_size *= 2) * sizeof (struct symbol *);
      sym_return_val = (struct symbol **) xrealloc ((char *) sym_return_val, newsize);
    }
  sym_return_val[sym_return_val_index++] = sym;
  sym_return_val[sym_return_val_index] = NULL;

  xfree (sym_name);
}

/* Return a null-terminated list of pointers to function symbols that
 * match name of the supplied symbol FSYM.
 * This is used in finding all overloaded instances of a function name.
 * This has been modified from make_symbol_completion_list.  */


struct symbol **
make_symbol_overload_list (struct symbol *fsym)
{
  register struct symbol *sym;
  register struct symtab *s;
  register struct partial_symtab *ps;
  register struct objfile *objfile;
  register struct block *b, *surrounding_static_block = 0;
  register int i;
  /* The name we are completing on. */
  char *oload_name = NULL;
  /* Length of name.  */
  int oload_name_len = 0;

  /* Look for the symbol we are supposed to complete on.
   * FIXME: This should be language-specific.  */

  oload_name = cplus_demangle (SYMBOL_NAME (fsym), DMGL_ARM | DMGL_ANSI);
  if (!oload_name)
    {
      oload_name = (char *) xmalloc (strlen (SYMBOL_NAME (fsym)) + 1);
      strcpy (oload_name, SYMBOL_NAME (fsym));
    }
  oload_name_len = strlen (oload_name);

  sym_return_val_size = 100;
  sym_return_val_index = 0;
  sym_return_val = (struct symbol **) xmalloc ((sym_return_val_size + 1) * sizeof (struct symbol *));
  sym_return_val[0] = NULL;

  /* Look through the partial symtabs for all symbols which begin
     by matching OLOAD_NAME.  Make sure we read that symbol table in. */

  ALL_PSYMTABS (objfile, ps)
  {
    struct partial_symbol **psym;

    /* If the psymtab's been read in we'll get it when we search
       through the blockvector.  */
    if (ps->readin)
      continue;

    for (psym = objfile->global_psymbols.list + ps->globals_offset;
	 psym < (objfile->global_psymbols.list + ps->globals_offset
		 + ps->n_global_syms);
	 psym++)
      {
	/* If interrupted, then quit. */
	QUIT;
        /* This will cause the symbol table to be read if it has not yet been */
        s = PSYMTAB_TO_SYMTAB (ps);
      }

    for (psym = objfile->static_psymbols.list + ps->statics_offset;
	 psym < (objfile->static_psymbols.list + ps->statics_offset
		 + ps->n_static_syms);
	 psym++)
      {
	QUIT;
        /* This will cause the symbol table to be read if it has not yet been */
        s = PSYMTAB_TO_SYMTAB (ps);
      }
  }

  /* Search upwards from currently selected frame (so that we can
     complete on local vars.  */

  for (b = get_selected_block (); b != NULL; b = BLOCK_SUPERBLOCK (b))
    {
      if (!BLOCK_SUPERBLOCK (b))
	{
	  surrounding_static_block = b;		/* For elimination of dups */
	}

      /* Also catch fields of types defined in this places which match our
         text string.  Only complete on types visible from current context. */

      for (i = 0; i < BLOCK_NSYMS (b); i++)
	{
	  sym = BLOCK_SYM (b, i);
	  overload_list_add_symbol (sym, oload_name);
	}
    }

  /* Go through the symtabs and check the externs and statics for
     symbols which match.  */

  ALL_SYMTABS (objfile, s)
  {
    QUIT;
    b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
    for (i = 0; i < BLOCK_NSYMS (b); i++)
      {
	sym = BLOCK_SYM (b, i);
	overload_list_add_symbol (sym, oload_name);
      }
  }

  ALL_SYMTABS (objfile, s)
  {
    QUIT;
    b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
    /* Don't do this block twice.  */
    if (b == surrounding_static_block)
      continue;
    for (i = 0; i < BLOCK_NSYMS (b); i++)
      {
	sym = BLOCK_SYM (b, i);
	overload_list_add_symbol (sym, oload_name);
      }
  }

  xfree (oload_name);

  return (sym_return_val);
}

/* End of overload resolution functions */

struct symtabs_and_lines
decode_line_spec (char *string, int funfirstline)
{
  struct symtabs_and_lines sals;
  if (string == 0)
    error ("Empty line specification.");
  sals = decode_line_1 (&string, funfirstline,
			current_source_symtab, current_source_line,
			(char ***) NULL);
  if (*string)
    error ("Junk at end of line specification: %s", string);
  return sals;
}

/* Track MAIN */
static char *name_of_main;

void
set_main_name (const char *name)
{
  if (name_of_main != NULL)
    {
      xfree (name_of_main);
      name_of_main = NULL;
    }
  if (name != NULL)
    {
      name_of_main = xstrdup (name);
    }
}

char *
main_name (void)
{
  if (name_of_main != NULL)
    return name_of_main;
  else
    return "main";
}


void
_initialize_symtab (void)
{
  add_info ("variables", variables_info,
	 "All global and static variable names, or those matching REGEXP.");
  if (dbx_commands)
    add_com ("whereis", class_info, variables_info,
	 "All global and static variable names, or those matching REGEXP.");

  add_info ("functions", functions_info,
	    "All function names, or those matching REGEXP.");

  
  /* FIXME:  This command has at least the following problems:
     1.  It prints builtin types (in a very strange and confusing fashion).
     2.  It doesn't print right, e.g. with
     typedef struct foo *FOO
     type_print prints "FOO" when we want to make it (in this situation)
     print "struct foo *".
     I also think "ptype" or "whatis" is more likely to be useful (but if
     there is much disagreement "info types" can be fixed).  */
  add_info ("types", types_info,
	    "All type names, or those matching REGEXP.");

#if 0
  add_info ("methods", methods_info,
	    "All method names, or those matching REGEXP::REGEXP.\n\
If the class qualifier is omitted, it is assumed to be the current scope.\n\
If the first REGEXP is omitted, then all methods matching the second REGEXP\n\
are listed.");
#endif
  add_info ("sources", sources_info,
	    "Source files in the program.");

  add_com ("rbreak", class_breakpoint, rbreak_command,
	   "Set a breakpoint for all functions matching REGEXP.");

  if (xdb_commands)
    {
      add_com ("lf", class_info, sources_info, "Source files in the program");
      add_com ("lg", class_info, variables_info,
	 "All global and static variable names, or those matching REGEXP.");
    }

  /* Initialize the one built-in type that isn't language dependent... */
  builtin_type_error = init_type (TYPE_CODE_ERROR, 0, 0,
				  "<unknown type>", (struct objfile *) NULL);
}