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
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
|
/*-
* This code is derived from software copyrighted by the Free Software
* Foundation.
*
* Modified 1991 by Donn Seeley at UUNET Technologies, Inc.
*/
#ifndef lint
static char sccsid[] = "@(#)ld.c 6.10 (Berkeley) 5/22/91";
#endif /* not lint */
/* Linker `ld' for GNU
Copyright (C) 1988 Free Software Foundation, Inc.
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 1, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Written by Richard Stallman with some help from Eric Albert.
Set, indirect, and warning symbol features added by Randy Smith. */
/* Define how to initialize system-dependent header fields. */
#include <ar.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <fcntl.h>
#include <a.out.h>
#include <stab.h>
#include <string.h>
/* symseg.h defines the obsolete GNU debugging format; we should nuke it. */
#define CORE_ADDR unsigned long /* For symseg.h */
#include "symseg.h"
#define N_SET_MAGIC(exec, val) ((exec).a_magic = val)
/* If compiled with GNU C, use the built-in alloca */
#ifdef __GNUC__
#define alloca __builtin_alloca
#endif
#define min(a,b) ((a) < (b) ? (a) : (b))
/* Macro to control the number of undefined references printed */
#define MAX_UREFS_PRINTED 10
/* Size of a page; obtained from the operating system. */
int page_size;
/* Name this program was invoked by. */
char *progname;
/* System dependencies */
/* Define this to specify the default executable format. */
#ifndef DEFAULT_MAGIC
#define DEFAULT_MAGIC ZMAGIC
#endif
#ifdef hp300
#define INITIALIZE_HEADER outheader.a_mid = MID_HP300
#endif
/* create screwball format for 386BSD to save space on floppies -wfj */
int screwballmode;
/*
* Ok. Following are the relocation information macros. If your
* system should not be able to use the default set (below), you must
* define the following:
* relocation_info: This must be typedef'd (or #define'd) to the type
* of structure that is stored in the relocation info section of your
* a.out files. Often this is defined in the a.out.h for your system.
*
* RELOC_ADDRESS (rval): Offset into the current section of the
* <whatever> to be relocated. *Must be an lvalue*.
*
* RELOC_EXTERN_P (rval): Is this relocation entry based on an
* external symbol (1), or was it fully resolved upon entering the
* loader (0) in which case some combination of the value in memory
* (if RELOC_MEMORY_ADD_P) and the extra (if RELOC_ADD_EXTRA) contains
* what the value of the relocation actually was. *Must be an lvalue*.
*
* RELOC_TYPE (rval): If this entry was fully resolved upon
* entering the loader, what type should it be relocated as?
*
* RELOC_SYMBOL (rval): If this entry was not fully resolved upon
* entering the loader, what is the index of it's symbol in the symbol
* table? *Must be a lvalue*.
*
* RELOC_MEMORY_ADD_P (rval): This should return true if the final
* relocation value output here should be added to memory, or if the
* section of memory described should simply be set to the relocation
* value.
*
* RELOC_ADD_EXTRA (rval): (Optional) This macro, if defined, gives
* an extra value to be added to the relocation value based on the
* individual relocation entry. *Must be an lvalue if defined*.
*
* RELOC_PCREL_P (rval): True if the relocation value described is
* pc relative.
*
* RELOC_VALUE_RIGHTSHIFT (rval): Number of bits right to shift the
* final relocation value before putting it where it belongs.
*
* RELOC_TARGET_SIZE (rval): log to the base 2 of the number of
* bytes of size this relocation entry describes; 1 byte == 0; 2 bytes
* == 1; 4 bytes == 2, and etc. This is somewhat redundant (we could
* do everything in terms of the bit operators below), but having this
* macro could end up producing better code on machines without fancy
* bit twiddling. Also, it's easier to understand/code big/little
* endian distinctions with this macro.
*
* RELOC_TARGET_BITPOS (rval): The starting bit position within the
* object described in RELOC_TARGET_SIZE in which the relocation value
* will go.
*
* RELOC_TARGET_BITSIZE (rval): How many bits are to be replaced
* with the bits of the relocation value. It may be assumed by the
* code that the relocation value will fit into this many bits. This
* may be larger than RELOC_TARGET_SIZE if such be useful.
*
*
* Things I haven't implemented
* ----------------------------
*
* Values for RELOC_TARGET_SIZE other than 0, 1, or 2.
*
* Pc relative relocation for External references.
*
*
*/
/* The following #if has been modifed for cross compilation */
/* It originally read: #if defined(sun) && defined(sparc) */
/* Marc Ullman, Stanford University Nov. 1 1989 */
#if defined(sun) && (TARGET == SUN4)
/* Sparc (Sun 4) macros */
#undef relocation_info
#define relocation_info reloc_info_sparc
#define RELOC_ADDRESS(r) ((r)->r_address)
#define RELOC_EXTERN_P(r) ((r)->r_extern)
#define RELOC_TYPE(r) ((r)->r_index)
#define RELOC_SYMBOL(r) ((r)->r_index)
#define RELOC_MEMORY_SUB_P(r) 0
#define RELOC_MEMORY_ADD_P(r) 0
#define RELOC_ADD_EXTRA(r) ((r)->r_addend)
#define RELOC_PCREL_P(r) \
((r)->r_type >= RELOC_DISP8 && (r)->r_type <= RELOC_WDISP22)
#define RELOC_VALUE_RIGHTSHIFT(r) (reloc_target_rightshift[(r)->r_type])
#define RELOC_TARGET_SIZE(r) (reloc_target_size[(r)->r_type])
#define RELOC_TARGET_BITPOS(r) 0
#define RELOC_TARGET_BITSIZE(r) (reloc_target_bitsize[(r)->r_type])
/* Note that these are very dependent on the order of the enums in
enum reloc_type (in a.out.h); if they change the following must be
changed */
/* Also note that the last few may be incorrect; I have no information */
static int reloc_target_rightshift[] = {
0, 0, 0, 0, 0, 0, 2, 2, 10, 0, 0, 0, 0, 0, 0,
};
static int reloc_target_size[] = {
0, 1, 2, 0, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
};
static int reloc_target_bitsize[] = {
8, 16, 32, 8, 16, 32, 30, 22, 22, 22, 13, 10, 32, 32, 16,
};
#define MAX_ALIGNMENT (sizeof (double))
#endif
/* Default macros */
#ifndef RELOC_ADDRESS
#define RELOC_ADDRESS(r) ((r)->r_address)
#define RELOC_EXTERN_P(r) ((r)->r_extern)
#define RELOC_TYPE(r) ((r)->r_symbolnum)
#define RELOC_SYMBOL(r) ((r)->r_symbolnum)
#define RELOC_MEMORY_SUB_P(r) 0
#define RELOC_MEMORY_ADD_P(r) 1
#undef RELOC_ADD_EXTRA
#define RELOC_PCREL_P(r) ((r)->r_pcrel)
#define RELOC_VALUE_RIGHTSHIFT(r) 0
#define RELOC_TARGET_SIZE(r) ((r)->r_length)
#define RELOC_TARGET_BITPOS(r) 0
#define RELOC_TARGET_BITSIZE(r) 32
#endif
#ifndef MAX_ALIGNMENT
#define MAX_ALIGNMENT (sizeof (int))
#endif
#ifdef nounderscore
#define LPREFIX '.'
#else
#define LPREFIX 'L'
#endif
#ifndef TEXT_START
#define TEXT_START(x) N_TXTADDR(x)
#endif
/* Special global symbol types understood by GNU LD. */
/* The following type indicates the definition of a symbol as being
an indirect reference to another symbol. The other symbol
appears as an undefined reference, immediately following this symbol.
Indirection is asymmetrical. The other symbol's value will be used
to satisfy requests for the indirect symbol, but not vice versa.
If the other symbol does not have a definition, libraries will
be searched to find a definition.
So, for example, the following two lines placed in an assembler
input file would result in an object file which would direct gnu ld
to resolve all references to symbol "foo" as references to symbol
"bar".
.stabs "_foo",11,0,0,0
.stabs "_bar",1,0,0,0
Note that (11 == (N_INDR | N_EXT)) and (1 == (N_UNDF | N_EXT)). */
#ifndef N_INDR
#define N_INDR 0xa
#endif
/* The following symbols refer to set elements. These are expected
only in input to the loader; they should not appear in loader
output (unless relocatable output is requested). To be recognized
by the loader, the input symbols must have their N_EXT bit set.
All the N_SET[ATDB] symbols with the same name form one set. The
loader collects all of these elements at load time and outputs a
vector for each name.
Space (an array of 32 bit words) is allocated for the set in the
data section, and the n_value field of each set element value is
stored into one word of the array.
The first word of the array is the length of the set (number of
elements). The last word of the vector is set to zero for possible
use by incremental loaders. The array is ordered by the linkage
order; the first symbols which the linker encounters will be first
in the array.
In C syntax this looks like:
struct set_vector {
unsigned int length;
unsigned int vector[length];
unsigned int always_zero;
};
Before being placed into the array, each element is relocated
according to its type. This allows the loader to create an array
of pointers to objects automatically. N_SETA type symbols will not
be relocated.
The address of the set is made into an N_SETV symbol
whose name is the same as the name of the set.
This symbol acts like a N_DATA global symbol
in that it can satisfy undefined external references.
For the purposes of determining whether or not to load in a library
file, set element definitions are not considered "real
definitions"; they will not cause the loading of a library
member.
If relocatable output is requested, none of this processing is
done. The symbols are simply relocated and passed through to the
output file.
So, for example, the following three lines of assembler code
(whether in one file or scattered between several different ones)
will produce a three element vector (total length is five words;
see above), referenced by the symbol "_xyzzy", which will have the
addresses of the routines _init1, _init2, and _init3.
*NOTE*: If symbolic addresses are used in the n_value field of the
defining .stabs, those symbols must be defined in the same file as
that containing the .stabs.
.stabs "_xyzzy",23,0,0,_init1
.stabs "_xyzzy",23,0,0,_init2
.stabs "_xyzzy",23,0,0,_init3
Note that (23 == (N_SETT | N_EXT)). */
#ifndef N_SETA
#define N_SETA 0x14 /* Absolute set element symbol */
#endif /* This is input to LD, in a .o file. */
#ifndef N_SETT
#define N_SETT 0x16 /* Text set element symbol */
#endif /* This is input to LD, in a .o file. */
#ifndef N_SETD
#define N_SETD 0x18 /* Data set element symbol */
#endif /* This is input to LD, in a .o file. */
#ifndef N_SETB
#define N_SETB 0x1A /* Bss set element symbol */
#endif /* This is input to LD, in a .o file. */
/* Macros dealing with the set element symbols defined in a.out.h */
#define SET_ELEMENT_P(x) ((x)>=N_SETA&&(x)<=(N_SETB|N_EXT))
#define TYPE_OF_SET_ELEMENT(x) ((x)-N_SETA+N_ABS)
#ifndef N_SETV
#define N_SETV 0x1C /* Pointer to set vector in data area. */
#endif /* This is output from LD. */
/* If a this type of symbol is encountered, its name is a warning
message to print each time the symbol referenced by the next symbol
table entry is referenced.
This feature may be used to allow backwards compatibility with
certain functions (eg. gets) but to discourage programmers from
their use.
So if, for example, you wanted to have ld print a warning whenever
the function "gets" was used in their C program, you would add the
following to the assembler file in which gets is defined:
.stabs "Obsolete function \"gets\" referenced",30,0,0,0
.stabs "_gets",1,0,0,0
These .stabs do not necessarily have to be in the same file as the
gets function, they simply must exist somewhere in the compilation. */
#ifndef N_WARNING
#define N_WARNING 0x1E /* Warning message to print if symbol
included */
#endif /* This is input to ld */
#ifndef __GNU_STAB__
/* Line number for the data section. This is to be used to describe
the source location of a variable declaration. */
#ifndef N_DSLINE
#define N_DSLINE (N_SLINE+N_DATA-N_TEXT)
#endif
/* Line number for the bss section. This is to be used to describe
the source location of a variable declaration. */
#ifndef N_BSLINE
#define N_BSLINE (N_SLINE+N_BSS-N_TEXT)
#endif
#endif /* not __GNU_STAB__ */
/* Symbol table */
/* Global symbol data is recorded in these structures,
one for each global symbol.
They are found via hashing in 'symtab', which points to a vector of buckets.
Each bucket is a chain of these structures through the link field. */
typedef
struct glosym
{
/* Pointer to next symbol in this symbol's hash bucket. */
struct glosym *link;
/* Name of this symbol. */
char *name;
/* Value of this symbol as a global symbol. */
long value;
/* Chain of external 'nlist's in files for this symbol, both defs
and refs. */
struct nlist *refs;
/* Any warning message that might be associated with this symbol
from an N_WARNING symbol encountered. */
char *warning;
/* Nonzero means definitions of this symbol as common have been seen,
and the value here is the largest size specified by any of them. */
int max_common_size;
/* For relocatable_output, records the index of this global sym in the
symbol table to be written, with the first global sym given index 0.*/
int def_count;
/* Nonzero means a definition of this global symbol is known to exist.
Library members should not be loaded on its account. */
char defined;
/* Nonzero means a reference to this global symbol has been seen
in a file that is surely being loaded.
A value higher than 1 is the n_type code for the symbol's
definition. */
char referenced;
/* A count of the number of undefined references printed for a
specific symbol. If a symbol is unresolved at the end of
digest_symbols (and the loading run is supposed to produce
relocatable output) do_file_warnings keeps track of how many
unresolved reference error messages have been printed for
each symbol here. When the number hits MAX_UREFS_PRINTED,
messages stop. */
unsigned char undef_refs;
/* 1 means that this symbol has multiple definitions. 2 means
that it has multiple definitions, and some of them are set
elements, one of which has been printed out already. */
unsigned char multiply_defined;
/* Nonzero means print a message at all refs or defs of this symbol */
char trace;
}
symbol;
/* Demangler for C++. */
extern char *cplus_demangle ();
/* Demangler function to use. */
char *(*demangler)() = NULL;
/* Number of buckets in symbol hash table */
#define TABSIZE 1009
/* The symbol hash table: a vector of TABSIZE pointers to struct glosym. */
symbol *symtab[TABSIZE];
/* Number of symbols in symbol hash table. */
int num_hash_tab_syms = 0;
/* Count the number of nlist entries that are for local symbols.
This count and the three following counts
are incremented as as symbols are entered in the symbol table. */
int local_sym_count;
/* Count number of nlist entries that are for local symbols
whose names don't start with L. */
int non_L_local_sym_count;
/* Count the number of nlist entries for debugger info. */
int debugger_sym_count;
/* Count the number of global symbols referenced and not defined. */
int undefined_global_sym_count;
/* Count the number of global symbols multiply defined. */
int multiple_def_count;
/* Count the number of defined global symbols.
Each symbol is counted only once
regardless of how many different nlist entries refer to it,
since the output file will need only one nlist entry for it.
This count is computed by `digest_symbols';
it is undefined while symbols are being loaded. */
int defined_global_sym_count;
/* Count the number of symbols defined through common declarations.
This count is kept in symdef_library, linear_library, and
enter_global_ref. It is incremented when the defined flag is set
in a symbol because of a common definition, and decremented when
the symbol is defined "for real" (ie. by something besides a common
definition). */
int common_defined_global_count;
/* Count the number of set element type symbols and the number of
separate vectors which these symbols will fit into. See the
GNU a.out.h for more info.
This count is computed by 'enter_file_symbols' */
int set_symbol_count;
int set_vector_count;
/* Define a linked list of strings which define symbols which should
be treated as set elements even though they aren't. Any symbol
with a prefix matching one of these should be treated as a set
element.
This is to make up for deficiencies in many assemblers which aren't
willing to pass any stabs through to the loader which they don't
understand. */
struct string_list_element {
char *str;
struct string_list_element *next;
};
struct string_list_element *set_element_prefixes;
/* Count the number of definitions done indirectly (ie. done relative
to the value of some other symbol. */
int global_indirect_count;
/* Count the number of warning symbols encountered. */
int warning_count;
/* Total number of symbols to be written in the output file.
Computed by digest_symbols from the variables above. */
int nsyms;
/* Nonzero means ptr to symbol entry for symbol to use as start addr.
-e sets this. */
symbol *entry_symbol;
symbol *edata_symbol; /* the symbol _edata */
symbol *etext_symbol; /* the symbol _etext */
symbol *end_symbol; /* the symbol _end */
/* Each input file, and each library member ("subfile") being loaded,
has a `file_entry' structure for it.
For files specified by command args, these are contained in the vector
which `file_table' points to.
For library members, they are dynamically allocated,
and chained through the `chain' field.
The chain is found in the `subfiles' field of the `file_entry'.
The `file_entry' objects for the members have `superfile' fields pointing
to the one for the library. */
struct file_entry {
/* Name of this file. */
char *filename;
/* Name to use for the symbol giving address of text start */
/* Usually the same as filename, but for a file spec'd with -l
this is the -l switch itself rather than the filename. */
char *local_sym_name;
/* Describe the layout of the contents of the file */
/* The file's a.out header. */
struct exec header;
/* Offset in file of GDB symbol segment, or 0 if there is none. */
int symseg_offset;
/* Describe data from the file loaded into core */
/* Symbol table of the file. */
struct nlist *symbols;
/* Size in bytes of string table. */
int string_size;
/* Pointer to the string table.
The string table is not kept in core all the time,
but when it is in core, its address is here. */
char *strings;
/* Next two used only if `relocatable_output' or if needed for */
/* output of undefined reference line numbers. */
/* Text reloc info saved by `write_text' for `coptxtrel'. */
struct relocation_info *textrel;
/* Data reloc info saved by `write_data' for `copdatrel'. */
struct relocation_info *datarel;
/* Relation of this file's segments to the output file */
/* Start of this file's text seg in the output file core image. */
int text_start_address;
/* Start of this file's data seg in the output file core image. */
int data_start_address;
/* Start of this file's bss seg in the output file core image. */
int bss_start_address;
/* Offset in bytes in the output file symbol table
of the first local symbol for this file. Set by `write_file_symbols'. */
int local_syms_offset;
/* For library members only */
/* For a library, points to chain of entries for the library members. */
struct file_entry *subfiles;
/* For a library member, offset of the member within the archive.
Zero for files that are not library members. */
int starting_offset;
/* Size of contents of this file, if library member. */
int total_size;
/* For library member, points to the library's own entry. */
struct file_entry *superfile;
/* For library member, points to next entry for next member. */
struct file_entry *chain;
/* 1 if file is a library. */
char library_flag;
/* 1 if file's header has been read into this structure. */
char header_read_flag;
/* 1 means search a set of directories for this file. */
char search_dirs_flag;
/* 1 means this is base file of incremental load.
Do not load this file's text or data.
Also default text_start to after this file's bss. */
char just_syms_flag;
};
/* Vector of entries for input files specified by arguments.
These are all the input files except for members of specified libraries. */
struct file_entry *file_table;
/* Length of that vector. */
int number_of_files;
/* When loading the text and data, we can avoid doing a close
and another open between members of the same library.
These two variables remember the file that is currently open.
Both are zero if no file is open.
See `each_file' and `file_close'. */
struct file_entry *input_file;
int input_desc;
/* The name of the file to write; "a.out" by default. */
char *output_filename;
/* Descriptor for writing that file with `mywrite'. */
int outdesc;
/* Header for that file (filled in by `write_header'). */
struct exec outheader;
#ifdef COFF_ENCAPSULATE
struct coffheader coffheader;
int need_coff_header;
#endif
/* The following are computed by `digest_symbols'. */
int text_size; /* total size of text of all input files. */
int data_size; /* total size of data of all input files. */
int bss_size; /* total size of bss of all input files. */
int text_reloc_size; /* total size of text relocation of all input files. */
int data_reloc_size; /* total size of data relocation of all input */
/* files. */
/* Specifications of start and length of the area reserved at the end
of the text segment for the set vectors. Computed in 'digest_symbols' */
int set_sect_start;
int set_sect_size;
/* Pointer for in core storage for the above vectors, before they are
written. */
unsigned long *set_vectors;
/* Amount of cleared space to leave between the text and data segments. */
int text_pad;
/* Amount of bss segment to include as part of the data segment. */
int data_pad;
/* Format of __.SYMDEF:
First, a longword containing the size of the 'symdef' data that follows.
Second, zero or more 'symdef' structures.
Third, a longword containing the length of symbol name strings.
Fourth, zero or more symbol name strings (each followed by a null). */
struct symdef {
int symbol_name_string_index;
int library_member_offset;
};
/* Record most of the command options. */
/* Address we assume the text section will be loaded at.
We relocate symbols and text and data for this, but we do not
write any padding in the output file for it. */
int text_start;
/* Offset of default entry-pc within the text section. */
int entry_offset;
/* Address we decide the data section will be loaded at. */
int data_start;
/* `text-start' address is normally this much plus a page boundary.
This is not a user option; it is fixed for each system. */
int text_start_alignment;
/* Nonzero if -T was specified in the command line.
This prevents text_start from being set later to default values. */
int T_flag_specified;
/* Nonzero if -Tdata was specified in the command line.
This prevents data_start from being set later to default values. */
int Tdata_flag_specified;
/* Size to pad data section up to.
We simply increase the size of the data section, padding with zeros,
and reduce the size of the bss section to match. */
int specified_data_size;
/* Magic number to use for the output file, set by switch. */
int magic;
/* Nonzero means print names of input files as processed. */
int trace_files;
/* Which symbols should be stripped (omitted from the output):
none, all, or debugger symbols. */
enum { STRIP_NONE, STRIP_ALL, STRIP_DEBUGGER } strip_symbols;
/* Which local symbols should be omitted:
none, all, or those starting with L.
This is irrelevant if STRIP_NONE. */
enum { DISCARD_NONE, DISCARD_ALL, DISCARD_L } discard_locals;
/* 1 => write load map. */
int write_map;
/* 1 => write relocation into output file so can re-input it later. */
int relocatable_output;
/* 1 => assign space to common symbols even if `relocatable_output'. */
int force_common_definition;
/* Standard directories to search for files specified by -l. */
char *standard_search_dirs[] =
#ifdef STANDARD_SEARCH_DIRS
{STANDARD_SEARCH_DIRS};
#else
#ifdef NON_NATIVE
{"/usr/local/lib/gnu"};
#else
{"/lib", "/usr/lib", "/usr/local/lib"};
#endif
#endif
/* Actual vector of directories to search;
this contains those specified with -L plus the standard ones. */
char **search_dirs;
/* Length of the vector `search_dirs'. */
int n_search_dirs;
/* Non zero means to create the output executable. */
/* Cleared by nonfatal errors. */
int make_executable;
/* Force the executable to be output, even if there are non-fatal
errors */
int force_executable;
/* Keep a list of any symbols referenced from the command line (so
that error messages for these guys can be generated). This list is
zero terminated. */
struct glosym **cmdline_references;
int cl_refs_allocated;
void bcopy (), bzero ();
int malloc (), realloc ();
#ifndef alloca
int alloca ();
#endif
int free ();
int xmalloc ();
int xrealloc ();
void fatal ();
void fatal_with_file ();
void perror_name ();
void perror_file ();
void error ();
void digest_symbols ();
void print_symbols ();
void load_symbols ();
void decode_command ();
void list_undefined_symbols ();
void list_unresolved_references ();
void write_output ();
void write_header ();
void write_text ();
void read_file_relocation ();
void write_data ();
void write_rel ();
void write_syms ();
void write_symsegs ();
void mywrite ();
void symtab_init ();
void padfile ();
char *concat ();
char *get_file_name ();
symbol *getsym (), *getsym_soft ();
int
main (argc, argv)
char **argv;
int argc;
{
/* Added this to stop ld core-dumping on very large .o files. */
#ifdef RLIMIT_STACK
/* Get rid of any avoidable limit on stack size. */
{
struct rlimit rlim;
/* Set the stack limit huge so that alloca does not fail. */
getrlimit (RLIMIT_STACK, &rlim);
rlim.rlim_cur = rlim.rlim_max;
setrlimit (RLIMIT_STACK, &rlim);
}
#endif /* RLIMIT_STACK */
page_size = getpagesize ();
progname = argv[0];
/* Clear the cumulative info on the output file. */
text_size = 0;
data_size = 0;
bss_size = 0;
text_reloc_size = 0;
data_reloc_size = 0;
data_pad = 0;
text_pad = 0;
/* Initialize the data about options. */
specified_data_size = 0;
strip_symbols = STRIP_NONE;
trace_files = 0;
discard_locals = DISCARD_NONE;
entry_symbol = 0;
write_map = 0;
relocatable_output = 0;
force_common_definition = 0;
T_flag_specified = 0;
Tdata_flag_specified = 0;
magic = DEFAULT_MAGIC;
make_executable = 1;
force_executable = 0;
set_element_prefixes = 0;
/* Initialize the cumulative counts of symbols. */
local_sym_count = 0;
non_L_local_sym_count = 0;
debugger_sym_count = 0;
undefined_global_sym_count = 0;
set_symbol_count = 0;
set_vector_count = 0;
global_indirect_count = 0;
warning_count = 0;
multiple_def_count = 0;
common_defined_global_count = 0;
/* Keep a list of symbols referenced from the command line */
cl_refs_allocated = 10;
cmdline_references
= (struct glosym **) xmalloc (cl_refs_allocated
* sizeof(struct glosym *));
*cmdline_references = 0;
/* Completely decode ARGV. */
decode_command (argc, argv);
/* Create the symbols `etext', `edata' and `end'. */
if (!relocatable_output)
symtab_init ();
/* Determine whether to count the header as part of
the text size, and initialize the text size accordingly.
This depends on the kind of system and on the output format selected. */
N_SET_MAGIC (outheader, magic);
#ifdef INITIALIZE_HEADER
INITIALIZE_HEADER;
#endif
text_size = sizeof (struct exec);
#ifdef COFF_ENCAPSULATE
if (relocatable_output == 0 && file_table[0].just_syms_flag == 0)
{
need_coff_header = 1;
/* set this flag now, since it will change the values of N_TXTOFF, etc */
N_SET_FLAGS (outheader, N_FLAGS_COFF_ENCAPSULATE);
text_size += sizeof (struct coffheader);
}
#endif
text_size -= N_TXTOFF (outheader);
if (text_size < 0)
text_size = 0;
entry_offset = text_size;
if (!T_flag_specified && !relocatable_output && !screwballmode)
text_start = TEXT_START (outheader);
/* The text-start address is normally this far past a page boundary. */
text_start_alignment = text_start % page_size;
/* Load symbols of all input files.
Also search all libraries and decide which library members to load. */
load_symbols ();
/* Compute where each file's sections go, and relocate symbols. */
digest_symbols ();
/* Print error messages for any missing symbols, for any warning
symbols, and possibly multiple definitions */
do_warnings (stderr);
/* Print a map, if requested. */
if (write_map) print_symbols (stdout);
/* Write the output file. */
if (make_executable || force_executable)
write_output ();
exit (!make_executable);
}
void decode_option ();
/* Analyze a command line argument.
Return 0 if the argument is a filename.
Return 1 if the argument is a option complete in itself.
Return 2 if the argument is a option which uses an argument.
Thus, the value is the number of consecutive arguments
that are part of options. */
int
classify_arg (arg)
register char *arg;
{
if (*arg != '-') return 0;
switch (arg[1])
{
case 'A':
case 'D':
case 'e':
case 'L':
case 'l':
case 'o':
case 'u':
case 'V':
case 'y':
if (arg[2])
return 1;
return 2;
case 'B':
if (! strcmp (&arg[2], "static"))
return 1;
case 'T':
if (arg[2] == 0)
return 2;
if (! strcmp (&arg[2], "text"))
return 2;
if (! strcmp (&arg[2], "data"))
return 2;
return 1;
}
return 1;
}
/* Process the command arguments,
setting up file_table with an entry for each input file,
and setting variables according to the options. */
void
decode_command (argc, argv)
char **argv;
int argc;
{
register int i;
register struct file_entry *p;
char *cp;
number_of_files = 0;
output_filename = "a.out";
n_search_dirs = 0;
search_dirs = (char **) xmalloc (sizeof (char *));
/* First compute number_of_files so we know how long to make file_table. */
/* Also process most options completely. */
for (i = 1; i < argc; i++)
{
register int code = classify_arg (argv[i]);
if (code)
{
if (i + code > argc)
fatal ("no argument following %s\n", argv[i]);
decode_option (argv[i], argv[i+1]);
if (argv[i][1] == 'l' || argv[i][1] == 'A')
number_of_files++;
i += code - 1;
}
else
number_of_files++;
}
if (!number_of_files)
fatal ("no input files", 0);
p = file_table
= (struct file_entry *) xmalloc (number_of_files * sizeof (struct file_entry));
bzero (p, number_of_files * sizeof (struct file_entry));
/* Now scan again and fill in file_table. */
/* All options except -A and -l are ignored here. */
for (i = 1; i < argc; i++)
{
register int code = classify_arg (argv[i]);
if (code)
{
char *string;
if (code == 2)
string = argv[i+1];
else
string = &argv[i][2];
if (argv[i][1] == 'A')
{
if (p != file_table)
fatal ("-A specified before an input file other than the first");
p->filename = string;
p->local_sym_name = string;
p->just_syms_flag = 1;
p++;
}
if (argv[i][1] == 'l')
{
if (cp = rindex(string, '/'))
{
*cp++ = '\0';
cp = concat (string, "/lib", cp);
p->filename = concat (cp, ".a", "");
}
else
p->filename = concat ("lib", string, ".a");
p->local_sym_name = concat ("-l", string, "");
p->search_dirs_flag = 1;
p++;
}
i += code - 1;
}
else
{
p->filename = argv[i];
p->local_sym_name = argv[i];
p++;
}
}
/* Now check some option settings for consistency. */
#ifdef NMAGIC
if ((magic == ZMAGIC || magic == NMAGIC)
#else
if ((magic == ZMAGIC)
#endif
&& (text_start - text_start_alignment) & (page_size - 1))
fatal ("-T argument not multiple of page size, with sharable output", 0);
/* Append the standard search directories to the user-specified ones. */
{
int n = sizeof standard_search_dirs / sizeof standard_search_dirs[0];
n_search_dirs += n;
search_dirs
= (char **) xrealloc (search_dirs, n_search_dirs * sizeof (char *));
bcopy (standard_search_dirs, &search_dirs[n_search_dirs - n],
n * sizeof (char *));
}
}
void
add_cmdline_ref (sp)
struct glosym *sp;
{
struct glosym **ptr;
for (ptr = cmdline_references;
ptr < cmdline_references + cl_refs_allocated && *ptr;
ptr++)
;
if (ptr >= cmdline_references + cl_refs_allocated - 1)
{
int diff = ptr - cmdline_references;
cl_refs_allocated *= 2;
cmdline_references = (struct glosym **)
xrealloc (cmdline_references,
cl_refs_allocated * sizeof (struct glosym *));
ptr = cmdline_references + diff;
}
*ptr++ = sp;
*ptr = (struct glosym *) 0;
}
int
set_element_prefixed_p (name)
char *name;
{
struct string_list_element *p;
int i;
for (p = set_element_prefixes; p; p = p->next)
{
for (i = 0; p->str[i] != '\0' && (p->str[i] == name[i]); i++)
;
if (p->str[i] == '\0')
return 1;
}
return 0;
}
int parse ();
/* Record an option and arrange to act on it later.
ARG should be the following command argument,
which may or may not be used by this option.
The `l' and `A' options are ignored here since they actually
specify input files. */
void
decode_option (swt, arg)
register char *swt, *arg;
{
/* We get Bstatic from gcc on suns. */
if (! strcmp (swt + 1, "Bstatic"))
return;
if (! strcmp (swt + 1, "Ttext"))
{
text_start = parse (arg, "%x", "invalid argument to -Ttext");
T_flag_specified = 1;
return;
}
if (! strcmp (swt + 1, "Tdata"))
{
data_start = parse (arg, "%x", "invalid argument to -Tdata");
Tdata_flag_specified = 1;
return;
}
if (! strcmp (swt + 1, "noinhibit-exec"))
{
force_executable = 1;
return;
}
if (! strcmp (swt + 1, "screwballmode"))
{
screwballmode = 1;
magic = OMAGIC;
text_start = sizeof(struct exec);
return;
}
if (swt[2] != 0)
arg = &swt[2];
switch (swt[1])
{
case 'A':
return;
case 'D':
specified_data_size = parse (arg, "%x", "invalid argument to -D");
return;
case 'd':
force_common_definition = 1;
return;
case 'e':
entry_symbol = getsym (arg);
if (!entry_symbol->defined && !entry_symbol->referenced)
undefined_global_sym_count++;
entry_symbol->referenced = 1;
add_cmdline_ref (entry_symbol);
return;
case 'l':
/* If linking with libg++, use the C++ demangler. */
if (arg != NULL && strcmp (arg, "g++") == 0)
demangler = cplus_demangle;
return;
magic = OMAGIC;
case 'L':
n_search_dirs++;
search_dirs
= (char **) xrealloc (search_dirs, n_search_dirs * sizeof (char *));
search_dirs[n_search_dirs - 1] = arg;
return;
case 'M':
write_map = 1;
return;
case 'N':
magic = OMAGIC;
#ifdef notnow
text_start = sizeof(struct exec); /* XXX */
screwballmode=1;
#endif
return;
#ifdef NMAGIC
case 'n':
magic = NMAGIC;
return;
#endif
case 'o':
output_filename = arg;
return;
case 'r':
relocatable_output = 1;
magic = OMAGIC;
text_start = 0;
return;
case 'S':
strip_symbols = STRIP_DEBUGGER;
return;
case 's':
strip_symbols = STRIP_ALL;
return;
case 'T':
text_start = parse (arg, "%x", "invalid argument to -T");
T_flag_specified = 1;
return;
case 't':
trace_files = 1;
return;
case 'u':
{
register symbol *sp = getsym (arg);
if (!sp->defined && !sp->referenced)
undefined_global_sym_count++;
sp->referenced = 1;
add_cmdline_ref (sp);
}
return;
case 'V':
{
struct string_list_element *new
= (struct string_list_element *)
xmalloc (sizeof (struct string_list_element));
new->str = arg;
new->next = set_element_prefixes;
set_element_prefixes = new;
return;
}
case 'X':
discard_locals = DISCARD_L;
return;
case 'x':
discard_locals = DISCARD_ALL;
return;
case 'y':
{
register symbol *sp = getsym (&swt[2]);
sp->trace = 1;
}
return;
case 'z':
magic = ZMAGIC;
return;
default:
fatal ("invalid command option `%s'", swt);
}
}
/** Convenient functions for operating on one or all files being */
/** loaded. */
void print_file_name ();
/* Call FUNCTION on each input file entry.
Do not call for entries for libraries;
instead, call once for each library member that is being loaded.
FUNCTION receives two arguments: the entry, and ARG. */
void
each_file (function, arg)
register void (*function)();
register int arg;
{
register int i;
for (i = 0; i < number_of_files; i++)
{
register struct file_entry *entry = &file_table[i];
if (entry->library_flag)
{
register struct file_entry *subentry = entry->subfiles;
for (; subentry; subentry = subentry->chain)
(*function) (subentry, arg);
}
else
(*function) (entry, arg);
}
}
/* Call FUNCTION on each input file entry until it returns a non-zero
value. Return this value.
Do not call for entries for libraries;
instead, call once for each library member that is being loaded.
FUNCTION receives two arguments: the entry, and ARG. It must be a
function returning unsigned long (though this can probably be fudged). */
unsigned long
check_each_file (function, arg)
register unsigned long (*function)();
register int arg;
{
register int i;
register unsigned long return_val;
for (i = 0; i < number_of_files; i++)
{
register struct file_entry *entry = &file_table[i];
if (entry->library_flag)
{
register struct file_entry *subentry = entry->subfiles;
for (; subentry; subentry = subentry->chain)
if (return_val = (*function) (subentry, arg))
return return_val;
}
else
if (return_val = (*function) (entry, arg))
return return_val;
}
return 0;
}
/* Like `each_file' but ignore files that were just for symbol definitions. */
void
each_full_file (function, arg)
register void (*function)();
register int arg;
{
register int i;
for (i = 0; i < number_of_files; i++)
{
register struct file_entry *entry = &file_table[i];
if (entry->just_syms_flag)
continue;
if (entry->library_flag)
{
register struct file_entry *subentry = entry->subfiles;
for (; subentry; subentry = subentry->chain)
(*function) (subentry, arg);
}
else
(*function) (entry, arg);
}
}
/* Close the input file that is now open. */
void
file_close ()
{
close (input_desc);
input_desc = 0;
input_file = 0;
}
/* Open the input file specified by 'entry', and return a descriptor.
The open file is remembered; if the same file is opened twice in a row,
a new open is not actually done. */
int
file_open (entry)
register struct file_entry *entry;
{
register int desc;
if (entry->superfile)
return file_open (entry->superfile);
if (entry == input_file)
return input_desc;
if (input_file) file_close ();
if (entry->search_dirs_flag)
{
int i;
for (i = 0; i < n_search_dirs; i++)
{
register char *string
= concat (search_dirs[i], "/", entry->filename);
desc = open (string, O_RDONLY, 0);
if (desc > 0)
{
entry->filename = string;
entry->search_dirs_flag = 0;
break;
}
free (string);
}
}
else
desc = open (entry->filename, O_RDONLY, 0);
if (desc > 0)
{
input_file = entry;
input_desc = desc;
return desc;
}
perror_file (entry);
/* NOTREACHED */
}
/* Print the filename of ENTRY on OUTFILE (a stdio stream),
and then a newline. */
void
prline_file_name (entry, outfile)
struct file_entry *entry;
FILE *outfile;
{
print_file_name (entry, outfile);
fprintf (outfile, "\n");
}
/* Print the filename of ENTRY on OUTFILE (a stdio stream). */
void
print_file_name (entry, outfile)
struct file_entry *entry;
FILE *outfile;
{
if (entry->superfile)
{
print_file_name (entry->superfile, outfile);
fprintf (outfile, "(%s)", entry->filename);
}
else
fprintf (outfile, "%s", entry->filename);
}
/* Return the filename of entry as a string (malloc'd for the purpose) */
char *
get_file_name (entry)
struct file_entry *entry;
{
char *result, *supfile;
if (entry->superfile)
{
supfile = get_file_name (entry->superfile);
result = (char *) xmalloc (strlen (supfile)
+ strlen (entry->filename) + 3);
sprintf (result, "%s(%s)", supfile, entry->filename);
free (supfile);
}
else
{
result = (char *) xmalloc (strlen (entry->filename) + 1);
strcpy (result, entry->filename);
}
return result;
}
/* Medium-level input routines for rel files. */
/* Read a file's header into the proper place in the file_entry.
DESC is the descriptor on which the file is open.
ENTRY is the file's entry. */
void
read_header (desc, entry)
int desc;
register struct file_entry *entry;
{
register int len;
struct exec *loc = (struct exec *) &entry->header;
lseek (desc, entry->starting_offset, 0);
#ifdef COFF_ENCAPSULATE
if (entry->just_syms_flag)
lseek (desc, sizeof(coffheader), 1);
#endif
len = read (desc, loc, sizeof (struct exec));
if (len != sizeof (struct exec))
fatal_with_file ("failure reading header of ", entry);
if (N_BADMAG (*loc))
fatal_with_file ("bad magic number in ", entry);
entry->header_read_flag = 1;
}
/* Read the symbols of file ENTRY into core.
Assume it is already open, on descriptor DESC.
Also read the length of the string table, which follows the symbol table,
but don't read the contents of the string table. */
void
read_entry_symbols (desc, entry)
struct file_entry *entry;
int desc;
{
int str_size;
if (!entry->header_read_flag)
read_header (desc, entry);
entry->symbols = (struct nlist *) xmalloc (entry->header.a_syms);
lseek (desc, N_SYMOFF (entry->header) + entry->starting_offset, 0);
if (entry->header.a_syms != read (desc, entry->symbols, entry->header.a_syms))
fatal_with_file ("premature end of file in symbols of ", entry);
lseek (desc, N_STROFF (entry->header) + entry->starting_offset, 0);
if (sizeof str_size != read (desc, &str_size, sizeof str_size))
fatal_with_file ("bad string table size in ", entry);
entry->string_size = str_size;
}
/* Read the string table of file ENTRY into core.
Assume it is already open, on descriptor DESC.
Also record whether a GDB symbol segment follows the string table. */
void
read_entry_strings (desc, entry)
struct file_entry *entry;
int desc;
{
int buffer;
if (!entry->header_read_flag)
read_header (desc, entry);
lseek (desc, N_STROFF (entry->header) + entry->starting_offset, 0);
if (entry->string_size != read (desc, entry->strings, entry->string_size))
fatal_with_file ("premature end of file in strings of ", entry);
#if 0
/* While we are here, see if the file has a symbol segment at the end.
For a separate file, just try reading some more.
For a library member, compare current pos against total size. */
if (entry->superfile)
{
if (entry->total_size == N_STROFF (entry->header) + entry->string_size)
return;
}
else
{
buffer = read (desc, &buffer, sizeof buffer);
if (buffer == 0)
return;
if (buffer != sizeof buffer)
fatal_with_file ("premature end of file in GDB symbol segment of ", entry);
}
#endif
/* Don't try to do anything with symsegs. */
return;
#if 0
/* eliminate warning of `statement not reached'. */
entry->symseg_offset = N_STROFF (entry->header) + entry->string_size;
#endif
}
/* Read in the symbols of all input files. */
void read_file_symbols (), read_entry_symbols (), read_entry_strings ();
void enter_file_symbols (), enter_global_ref (), search_library ();
void
load_symbols ()
{
register int i;
if (trace_files) fprintf (stderr, "Loading symbols:\n\n");
for (i = 0; i < number_of_files; i++)
{
register struct file_entry *entry = &file_table[i];
read_file_symbols (entry);
}
if (trace_files) fprintf (stderr, "\n");
}
/* If ENTRY is a rel file, read its symbol and string sections into core.
If it is a library, search it and load the appropriate members
(which means calling this function recursively on those members). */
void
read_file_symbols (entry)
register struct file_entry *entry;
{
register int desc;
register int len;
struct exec hdr;
desc = file_open (entry);
#ifdef COFF_ENCAPSULATE
if (entry->just_syms_flag)
lseek (desc, sizeof(coffheader),0);
#endif
len = read (desc, &hdr, sizeof hdr);
if (len != sizeof hdr)
fatal_with_file ("failure reading header of ", entry);
if (!N_BADMAG (hdr))
{
read_entry_symbols (desc, entry);
entry->strings = (char *) alloca (entry->string_size);
read_entry_strings (desc, entry);
enter_file_symbols (entry);
entry->strings = 0;
}
else
{
char armag[SARMAG];
lseek (desc, 0, 0);
if (SARMAG != read (desc, armag, SARMAG) || strncmp (armag, ARMAG, SARMAG))
fatal_with_file ("malformed input file (not rel or archive) ", entry);
entry->library_flag = 1;
search_library (desc, entry);
}
file_close ();
}
/* Enter the external symbol defs and refs of ENTRY in the hash table. */
void
enter_file_symbols (entry)
struct file_entry *entry;
{
register struct nlist
*p,
*end = entry->symbols + entry->header.a_syms / sizeof (struct nlist);
if (trace_files) prline_file_name (entry, stderr);
for (p = entry->symbols; p < end; p++)
{
if (p->n_type == (N_SETV | N_EXT)) continue;
if (set_element_prefixes
&& set_element_prefixed_p (p->n_un.n_strx + entry->strings))
p->n_type += (N_SETA - N_ABS);
if (SET_ELEMENT_P (p->n_type))
{
set_symbol_count++;
if (!relocatable_output)
enter_global_ref (p, p->n_un.n_strx + entry->strings, entry);
}
else if (p->n_type == N_WARNING)
{
char *name = p->n_un.n_strx + entry->strings;
/* Grab the next entry. */
p++;
if (p->n_type != (N_UNDF | N_EXT))
{
fprintf (stderr, "%s: Warning symbol found in %s without external reference following.\n",
progname, entry->filename);
make_executable = 0;
p--; /* Process normally. */
}
else
{
symbol *sp;
char *sname = p->n_un.n_strx + entry->strings;
/* Deal with the warning symbol. */
enter_global_ref (p, p->n_un.n_strx + entry->strings, entry);
sp = getsym (sname);
sp->warning = (char *) xmalloc (strlen(name) + 1);
strcpy (sp->warning, name);
warning_count++;
}
}
else if (p->n_type & N_EXT)
enter_global_ref (p, p->n_un.n_strx + entry->strings, entry);
else if (p->n_un.n_strx && !(p->n_type & (N_STAB | N_EXT)))
{
if ((p->n_un.n_strx + entry->strings)[0] != LPREFIX)
non_L_local_sym_count++;
local_sym_count++;
}
else debugger_sym_count++;
}
/* Count one for the local symbol that we generate,
whose name is the file's name (usually) and whose address
is the start of the file's text. */
local_sym_count++;
non_L_local_sym_count++;
}
/* Enter one global symbol in the hash table.
NLIST_P points to the `struct nlist' read from the file
that describes the global symbol. NAME is the symbol's name.
ENTRY is the file entry for the file the symbol comes from.
The `struct nlist' is modified by placing it on a chain of
all such structs that refer to the same global symbol.
This chain starts in the `refs' field of the symbol table entry
and is chained through the `n_name'. */
void
enter_global_ref (nlist_p, name, entry)
register struct nlist *nlist_p;
char *name;
struct file_entry *entry;
{
register symbol *sp = getsym (name);
register int type = nlist_p->n_type;
int oldref = sp->referenced;
int olddef = sp->defined;
nlist_p->n_un.n_name = (char *) sp->refs;
sp->refs = nlist_p;
sp->referenced = 1;
if (type != (N_UNDF | N_EXT) || nlist_p->n_value)
{
if (!sp->defined || sp->defined == (N_UNDF | N_EXT))
sp->defined = type;
if (oldref && !olddef)
/* It used to be undefined and we're defining it. */
undefined_global_sym_count--;
if (!olddef && type == (N_UNDF | N_EXT) && nlist_p->n_value)
{
/* First definition and it's common. */
common_defined_global_count++;
sp->max_common_size = nlist_p->n_value;
}
else if (olddef && sp->max_common_size && type != (N_UNDF | N_EXT))
{
/* It used to be common and we're defining it as
something else. */
common_defined_global_count--;
sp->max_common_size = 0;
}
else if (olddef && sp->max_common_size && type == (N_UNDF | N_EXT)
&& sp->max_common_size < nlist_p->n_value)
/* It used to be common and this is a new common entry to
which we need to pay attention. */
sp->max_common_size = nlist_p->n_value;
/* Are we defining it as a set element? */
if (SET_ELEMENT_P (type)
&& (!olddef || (olddef && sp->max_common_size)))
set_vector_count++;
/* As an indirection? */
else if (type == (N_INDR | N_EXT))
{
/* Indirect symbols value should be modified to point
a symbol being equivalenced to. */
nlist_p->n_value
= (unsigned int) getsym ((nlist_p + 1)->n_un.n_strx
+ entry->strings);
if ((symbol *) nlist_p->n_value == sp)
{
/* Somebody redefined a symbol to be itself. */
fprintf (stderr, "%s: Symbol %s indirected to itself.\n",
entry->filename, name);
/* Rewrite this symbol as being a global text symbol
with value 0. */
nlist_p->n_type = sp->defined = N_TEXT | N_EXT;
nlist_p->n_value = 0;
/* Don't make the output executable. */
make_executable = 0;
}
else
global_indirect_count++;
}
}
else
if (!oldref)
#ifndef DOLLAR_KLUDGE
undefined_global_sym_count++;
#else
{
if (entry->superfile && type == (N_UNDF | N_EXT) && name[1] == '$')
{
/* This is an (ISI?) $-conditional; skip it */
sp->referenced = 0;
if (sp->trace)
{
fprintf (stderr, "symbol %s is a $-conditional ignored in ", sp->name);
print_file_name (entry, stderr);
fprintf (stderr, "\n");
}
return;
}
else
undefined_global_sym_count++;
}
#endif
if (sp == end_symbol && entry->just_syms_flag && !T_flag_specified
&& !screwballmode)
text_start = nlist_p->n_value;
if (sp->trace)
{
register char *reftype;
switch (type & N_TYPE)
{
case N_UNDF:
if (nlist_p->n_value)
reftype = "defined as common";
else reftype = "referenced";
break;
case N_ABS:
reftype = "defined as absolute";
break;
case N_TEXT:
reftype = "defined in text section";
break;
case N_DATA:
reftype = "defined in data section";
break;
case N_BSS:
reftype = "defined in BSS section";
break;
case N_SETT:
reftype = "is a text set element";
break;
case N_SETD:
reftype = "is a data set element";
break;
case N_SETB:
reftype = "is a BSS set element";
break;
case N_SETA:
reftype = "is an absolute set element";
break;
case N_SETV:
reftype = "defined in data section as vector";
break;
case N_INDR:
reftype = (char *) alloca (23
+ strlen ((nlist_p + 1)->n_un.n_strx
+ entry->strings));
sprintf (reftype, "defined equivalent to %s",
(nlist_p + 1)->n_un.n_strx + entry->strings);
break;
#ifdef sequent
case N_SHUNDF:
reftype = "shared undf";
break;
/* These conflict with cases above.
case N_SHDATA:
reftype = "shared data";
break;
case N_SHBSS:
reftype = "shared BSS";
break;
*/
default:
reftype = "I don't know this type";
break;
#endif
}
fprintf (stderr, "symbol %s %s in ", sp->name, reftype);
print_file_name (entry, stderr);
fprintf (stderr, "\n");
}
}
/* This return 0 if the given file entry's symbol table does *not*
contain the nlist point entry, and it returns the files entry
pointer (cast to unsigned long) if it does. */
unsigned long
contains_symbol (entry, n_ptr)
struct file_entry *entry;
register struct nlist *n_ptr;
{
if (n_ptr >= entry->symbols &&
n_ptr < (entry->symbols
+ (entry->header.a_syms / sizeof (struct nlist))))
return (unsigned long) entry;
return 0;
}
/* Searching libraries */
struct file_entry *decode_library_subfile ();
void linear_library (), symdef_library ();
/* Search the library ENTRY, already open on descriptor DESC.
This means deciding which library members to load,
making a chain of `struct file_entry' for those members,
and entering their global symbols in the hash table. */
void
search_library (desc, entry)
int desc;
struct file_entry *entry;
{
int member_length;
register char *name;
register struct file_entry *subentry;
if (!undefined_global_sym_count) return;
/* Examine its first member, which starts SARMAG bytes in. */
subentry = decode_library_subfile (desc, entry, SARMAG, &member_length);
if (!subentry) return;
name = subentry->filename;
free (subentry);
/* Search via __.SYMDEF if that exists, else linearly. */
if (!strcmp (name, "__.SYMDEF"))
symdef_library (desc, entry, member_length);
else
linear_library (desc, entry);
}
/* Construct and return a file_entry for a library member.
The library's file_entry is library_entry, and the library is open on DESC.
SUBFILE_OFFSET is the byte index in the library of this member's header.
We store the length of the member into *LENGTH_LOC. */
struct file_entry *
decode_library_subfile (desc, library_entry, subfile_offset, length_loc)
int desc;
struct file_entry *library_entry;
int subfile_offset;
int *length_loc;
{
int bytes_read;
register int namelen;
int member_length;
register char *name;
struct ar_hdr hdr1;
register struct file_entry *subentry;
lseek (desc, subfile_offset, 0);
bytes_read = read (desc, &hdr1, sizeof hdr1);
if (!bytes_read)
return 0; /* end of archive */
if (sizeof hdr1 != bytes_read)
fatal_with_file ("malformed library archive ", library_entry);
if (sscanf (hdr1.ar_size, "%d", &member_length) != 1)
fatal_with_file ("malformatted header of archive member in ", library_entry);
subentry = (struct file_entry *) xmalloc (sizeof (struct file_entry));
bzero (subentry, sizeof (struct file_entry));
for (namelen = 0;
namelen < sizeof hdr1.ar_name
&& hdr1.ar_name[namelen] != 0 && hdr1.ar_name[namelen] != ' '
&& hdr1.ar_name[namelen] != '/';
namelen++);
name = (char *) xmalloc (namelen+1);
strncpy (name, hdr1.ar_name, namelen);
name[namelen] = 0;
subentry->filename = name;
subentry->local_sym_name = name;
subentry->symbols = 0;
subentry->strings = 0;
subentry->subfiles = 0;
subentry->starting_offset = subfile_offset + sizeof hdr1;
subentry->superfile = library_entry;
subentry->library_flag = 0;
subentry->header_read_flag = 0;
subentry->just_syms_flag = 0;
subentry->chain = 0;
subentry->total_size = member_length;
(*length_loc) = member_length;
return subentry;
}
int subfile_wanted_p ();
/* Search a library that has a __.SYMDEF member.
DESC is a descriptor on which the library is open.
The file pointer is assumed to point at the __.SYMDEF data.
ENTRY is the library's file_entry.
MEMBER_LENGTH is the length of the __.SYMDEF data. */
void
symdef_library (desc, entry, member_length)
int desc;
struct file_entry *entry;
int member_length;
{
int *symdef_data = (int *) xmalloc (member_length);
register struct symdef *symdef_base;
char *sym_name_base;
int number_of_symdefs;
int length_of_strings;
int not_finished;
int bytes_read;
register int i;
struct file_entry *prev = 0;
int prev_offset = 0;
bytes_read = read (desc, symdef_data, member_length);
if (bytes_read != member_length)
fatal_with_file ("malformatted __.SYMDEF in ", entry);
number_of_symdefs = *symdef_data / sizeof (struct symdef);
if (number_of_symdefs < 0 ||
number_of_symdefs * sizeof (struct symdef) + 2 * sizeof (int) > member_length)
fatal_with_file ("malformatted __.SYMDEF in ", entry);
symdef_base = (struct symdef *) (symdef_data + 1);
length_of_strings = *(int *) (symdef_base + number_of_symdefs);
if (length_of_strings < 0
|| number_of_symdefs * sizeof (struct symdef) + length_of_strings
+ 2 * sizeof (int) > member_length)
fatal_with_file ("malformatted __.SYMDEF in ", entry);
sym_name_base = sizeof (int) + (char *) (symdef_base + number_of_symdefs);
/* Check all the string indexes for validity. */
for (i = 0; i < number_of_symdefs; i++)
{
register int index = symdef_base[i].symbol_name_string_index;
if (index < 0 || index >= length_of_strings
|| (index && *(sym_name_base + index - 1)))
fatal_with_file ("malformatted __.SYMDEF in ", entry);
}
/* Search the symdef data for members to load.
Do this until one whole pass finds nothing to load. */
not_finished = 1;
while (not_finished)
{
not_finished = 0;
/* Scan all the symbols mentioned in the symdef for ones that we need.
Load the library members that contain such symbols. */
for (i = 0;
(i < number_of_symdefs
&& (undefined_global_sym_count || common_defined_global_count));
i++)
if (symdef_base[i].symbol_name_string_index >= 0)
{
register symbol *sp;
sp = getsym_soft (sym_name_base
+ symdef_base[i].symbol_name_string_index);
/* If we find a symbol that appears to be needed, think carefully
about the archive member that the symbol is in. */
if (sp && ((sp->referenced && !sp->defined)
|| (sp->defined && sp->max_common_size)))
{
int junk;
register int j;
register int offset = symdef_base[i].library_member_offset;
struct file_entry *subentry;
/* Don't think carefully about any archive member
more than once in a given pass. */
if (prev_offset == offset)
continue;
prev_offset = offset;
/* Read the symbol table of the archive member. */
subentry = decode_library_subfile (desc, entry, offset, &junk);
if (subentry == 0)
fatal ("invalid offset for %s in symbol table of %s",
sym_name_base
+ symdef_base[i].symbol_name_string_index,
entry->filename);
read_entry_symbols (desc, subentry);
subentry->strings = (char *) malloc (subentry->string_size);
read_entry_strings (desc, subentry);
/* Now scan the symbol table and decide whether to load. */
if (!subfile_wanted_p (subentry))
{
free (subentry->symbols);
free (subentry);
}
else
{
/* This member is needed; load it.
Since we are loading something on this pass,
we must make another pass through the symdef data. */
not_finished = 1;
enter_file_symbols (subentry);
if (prev)
prev->chain = subentry;
else entry->subfiles = subentry;
prev = subentry;
/* Clear out this member's symbols from the symdef data
so that following passes won't waste time on them. */
for (j = 0; j < number_of_symdefs; j++)
{
if (symdef_base[j].library_member_offset == offset)
symdef_base[j].symbol_name_string_index = -1;
}
}
/* We'll read the strings again if we need them again. */
free (subentry->strings);
subentry->strings = 0;
}
}
}
free (symdef_data);
}
/* Search a library that has no __.SYMDEF.
ENTRY is the library's file_entry.
DESC is the descriptor it is open on. */
void
linear_library (desc, entry)
int desc;
struct file_entry *entry;
{
register struct file_entry *prev = 0;
register int this_subfile_offset = SARMAG;
while (undefined_global_sym_count || common_defined_global_count)
{
int member_length;
register struct file_entry *subentry;
subentry = decode_library_subfile (desc, entry, this_subfile_offset,
&member_length);
if (!subentry) return;
read_entry_symbols (desc, subentry);
subentry->strings = (char *) alloca (subentry->string_size);
read_entry_strings (desc, subentry);
if (!subfile_wanted_p (subentry))
{
free (subentry->symbols);
free (subentry);
}
else
{
enter_file_symbols (subentry);
if (prev)
prev->chain = subentry;
else entry->subfiles = subentry;
prev = subentry;
subentry->strings = 0; /* Since space will dissapear on return */
}
this_subfile_offset += member_length + sizeof (struct ar_hdr);
if (this_subfile_offset & 1) this_subfile_offset++;
}
}
/* ENTRY is an entry for a library member.
Its symbols have been read into core, but not entered.
Return nonzero if we ought to load this member. */
int
subfile_wanted_p (entry)
struct file_entry *entry;
{
register struct nlist *p;
register struct nlist *end
= entry->symbols + entry->header.a_syms / sizeof (struct nlist);
#ifdef DOLLAR_KLUDGE
register int dollar_cond = 0;
#endif
for (p = entry->symbols; p < end; p++)
{
register int type = p->n_type;
register char *name = p->n_un.n_strx + entry->strings;
/* If the symbol has an interesting definition, we could
potentially want it. */
if (type & N_EXT
&& (type != (N_UNDF | N_EXT) || p->n_value
#ifdef DOLLAR_KLUDGE
|| name[1] == '$'
#endif
)
&& !SET_ELEMENT_P (type)
&& !set_element_prefixed_p (name))
{
register symbol *sp = getsym_soft (name);
#ifdef DOLLAR_KLUDGE
if (name[1] == '$')
{
sp = getsym_soft (&name[2]);
dollar_cond = 1;
if (!sp) continue;
if (sp->referenced)
{
if (write_map)
{
print_file_name (entry, stdout);
fprintf (stdout, " needed due to $-conditional %s\n", name);
}
return 1;
}
continue;
}
#endif
/* If this symbol has not been hashed, we can't be looking for it. */
if (!sp) continue;
if ((sp->referenced && !sp->defined)
|| (sp->defined && sp->max_common_size && (type & N_TEXT) == 0))
{
/* This is a symbol we are looking for. It is either
not yet defined or defined as a common. */
#ifdef DOLLAR_KLUDGE
if (dollar_cond) continue;
#endif
if (type == (N_UNDF | N_EXT))
{
/* Symbol being defined as common.
Remember this, but don't load subfile just for this. */
/* If it didn't used to be common, up the count of
common symbols. */
if (!sp->max_common_size)
common_defined_global_count++;
if (sp->max_common_size < p->n_value)
sp->max_common_size = p->n_value;
if (!sp->defined)
undefined_global_sym_count--;
sp->defined = 1;
continue;
}
if (write_map)
{
print_file_name (entry, stdout);
fprintf (stdout, " needed due to %s\n", sp->name);
}
return 1;
}
}
}
return 0;
}
void consider_file_section_lengths (), relocate_file_addresses ();
/* Having entered all the global symbols and found the sizes of sections
of all files to be linked, make all appropriate deductions from this data.
We propagate global symbol values from definitions to references.
We compute the layout of the output file and where each input file's
contents fit into it. */
void
digest_symbols ()
{
register int i;
int setv_fill_count;
if (trace_files)
fprintf (stderr, "Digesting symbol information:\n\n");
/* Compute total size of sections */
each_file (consider_file_section_lengths, 0);
/* If necessary, pad text section to full page in the file.
Include the padding in the text segment size. */
if (magic == ZMAGIC)
{
int text_end = text_size + N_TXTOFF (outheader);
text_pad = ((text_end + page_size - 1) & (- page_size)) - text_end;
text_size += text_pad;
}
#ifdef _N_BASEADDR
/* SunOS 4.1 N_TXTADDR depends on the value of outheader.a_entry. */
outheader.a_entry = N_PAGSIZ (outheader);
#endif
outheader.a_text = text_size;
#ifdef sequent
outheader.a_text += N_ADDRADJ (outheader);
#endif
/* Make the data segment address start in memory on a suitable boundary. */
if (! Tdata_flag_specified)
data_start = N_DATADDR (outheader) + text_start - TEXT_START (outheader);
/* Set up the set element vector */
if (!relocatable_output)
{
/* The set sector size is the number of set elements + a word
for each symbol for the length word at the beginning of the
vector, plus a word for each symbol for a zero at the end of
the vector (for incremental linking). */
set_sect_size
= (2 * set_symbol_count + set_vector_count) * sizeof (unsigned long);
set_sect_start = data_start + data_size;
data_size += set_sect_size;
set_vectors = (unsigned long *) xmalloc (set_sect_size);
setv_fill_count = 0;
}
/* Compute start addresses of each file's sections and symbols. */
each_full_file (relocate_file_addresses, 0);
/* Now, for each symbol, verify that it is defined globally at most once.
Put the global value into the symbol entry.
Common symbols are allocated here, in the BSS section.
Each defined symbol is given a '->defined' field
which is the correct N_ code for its definition,
except in the case of common symbols with -r.
Then make all the references point at the symbol entry
instead of being chained together. */
defined_global_sym_count = 0;
for (i = 0; i < TABSIZE; i++)
{
register symbol *sp;
for (sp = symtab[i]; sp; sp = sp->link)
{
/* For each symbol */
register struct nlist *p, *next;
int defs = 0, com = sp->max_common_size;
struct nlist *first_definition;
for (p = sp->refs; p; p = next)
{
register int type = p->n_type;
if (SET_ELEMENT_P (type))
{
if (relocatable_output)
fatal ("internal: global ref to set element with -r");
if (!defs++)
{
sp->value = set_sect_start
+ setv_fill_count++ * sizeof (unsigned long);
sp->defined = N_SETV | N_EXT;
first_definition = p;
}
else if ((sp->defined & ~N_EXT) != N_SETV)
{
sp->multiply_defined = 1;
multiple_def_count++;
}
set_vectors[setv_fill_count++] = p->n_value;
}
else if ((type & N_EXT) && type != (N_UNDF | N_EXT)
&& (type & N_TYPE) != N_FN)
{
/* non-common definition */
if (defs++ && sp->value != p->n_value)
{
sp->multiply_defined = 1;
multiple_def_count++;
}
sp->value = p->n_value;
sp->defined = type;
first_definition = p;
}
next = (struct nlist *) p->n_un.n_name;
p->n_un.n_name = (char *) sp;
}
/* Allocate as common if defined as common and not defined for real */
if (com && !defs)
{
if (!relocatable_output || force_common_definition)
{
int align = sizeof (int);
/* Round up to nearest sizeof (int). I don't know
whether this is necessary or not (given that
alignment is taken care of later), but it's
traditional, so I'll leave it in. Note that if
this size alignment is ever removed, ALIGN above
will have to be initialized to 1 instead of
sizeof (int). */
com = (com + sizeof (int) - 1) & (- sizeof (int));
while (!(com & align))
align <<= 1;
align = align > MAX_ALIGNMENT ? MAX_ALIGNMENT : align;
bss_size = ((((bss_size + data_size + data_start)
+ (align - 1)) & (- align))
- data_size - data_start);
sp->value = data_start + data_size + bss_size;
sp->defined = N_BSS | N_EXT;
bss_size += com;
if (write_map)
printf ("Allocating common %s: %x at %x\n",
sp->name, com, sp->value);
}
else
{
sp->defined = 0;
undefined_global_sym_count++;
}
}
/* Set length word at front of vector and zero byte at end.
Reverse the vector itself to put it in file order. */
if ((sp->defined & ~N_EXT) == N_SETV)
{
unsigned long length_word_index
= (sp->value - set_sect_start) / sizeof (unsigned long);
unsigned long i, tmp;
set_vectors[length_word_index]
= setv_fill_count - 1 - length_word_index;
/* Reverse the vector. */
for (i = 1;
i < (setv_fill_count - length_word_index - 1) / 2 + 1;
i++)
{
tmp = set_vectors[length_word_index + i];
set_vectors[length_word_index + i]
= set_vectors[setv_fill_count - i];
set_vectors[setv_fill_count - i] = tmp;
}
set_vectors[setv_fill_count++] = 0;
}
if (sp->defined)
defined_global_sym_count++;
}
}
if (end_symbol) /* These are null if -r. */
{
etext_symbol->value = text_size + text_start;
edata_symbol->value = data_start + data_size;
end_symbol->value = data_start + data_size + bss_size;
}
/* Figure the data_pad now, so that it overlaps with the bss addresses. */
if (specified_data_size && specified_data_size > data_size)
data_pad = specified_data_size - data_size;
if (magic == ZMAGIC)
data_pad = ((data_pad + data_size + page_size - 1) & (- page_size))
- data_size;
bss_size -= data_pad;
if (bss_size < 0) bss_size = 0;
data_size += data_pad;
}
/* Accumulate the section sizes of input file ENTRY
into the section sizes of the output file. */
void
consider_file_section_lengths (entry)
register struct file_entry *entry;
{
if (entry->just_syms_flag)
return;
entry->text_start_address = text_size;
/* If there were any vectors, we need to chop them off */
text_size += entry->header.a_text;
entry->data_start_address = data_size;
data_size += entry->header.a_data;
entry->bss_start_address = bss_size;
bss_size += entry->header.a_bss;
text_reloc_size += entry->header.a_trsize;
data_reloc_size += entry->header.a_drsize;
}
/* Determine where the sections of ENTRY go into the output file,
whose total section sizes are already known.
Also relocate the addresses of the file's local and debugger symbols. */
void
relocate_file_addresses (entry)
register struct file_entry *entry;
{
entry->text_start_address += text_start;
/* Note that `data_start' and `data_size' have not yet been
adjusted for `data_pad'. If they had been, we would get the wrong
results here. */
entry->data_start_address += data_start;
entry->bss_start_address += data_start + data_size;
{
register struct nlist *p;
register struct nlist *end
= entry->symbols + entry->header.a_syms / sizeof (struct nlist);
for (p = entry->symbols; p < end; p++)
{
/* If this belongs to a section, update it by the section's start address */
register int type = p->n_type & N_TYPE;
switch (type)
{
case N_TEXT:
case N_SETT:
p->n_value += entry->text_start_address;
break;
case N_DATA:
case N_SETV:
case N_SETD:
/* A symbol whose value is in the data section
is present in the input file as if the data section
started at an address equal to the length of the file's text. */
p->n_value += entry->data_start_address - entry->header.a_text;
break;
case N_BSS:
case N_SETB:
/* likewise for symbols with value in BSS. */
p->n_value += entry->bss_start_address
- entry->header.a_text - entry->header.a_data;
break;
}
}
}
}
void describe_file_sections (), list_file_locals ();
/* Print a complete or partial map of the output file. */
void
print_symbols (outfile)
FILE *outfile;
{
register int i;
fprintf (outfile, "\nFiles:\n\n");
each_file (describe_file_sections, outfile);
fprintf (outfile, "\nGlobal symbols:\n\n");
for (i = 0; i < TABSIZE; i++)
{
register symbol *sp;
for (sp = symtab[i]; sp; sp = sp->link)
{
if (sp->defined == 1)
fprintf (outfile, " %s: common, length 0x%x\n", sp->name, sp->max_common_size);
if (sp->defined)
fprintf (outfile, " %s: 0x%x\n", sp->name, sp->value);
else if (sp->referenced)
fprintf (outfile, " %s: undefined\n", sp->name);
}
}
each_file (list_file_locals, outfile);
}
void
describe_file_sections (entry, outfile)
struct file_entry *entry;
FILE *outfile;
{
fprintf (outfile, " ");
print_file_name (entry, outfile);
if (entry->just_syms_flag)
fprintf (outfile, " symbols only\n", 0);
else
fprintf (outfile, " text %x(%x), data %x(%x), bss %x(%x) hex\n",
entry->text_start_address, entry->header.a_text,
entry->data_start_address, entry->header.a_data,
entry->bss_start_address, entry->header.a_bss);
}
void
list_file_locals (entry, outfile)
struct file_entry *entry;
FILE *outfile;
{
register struct nlist
*p,
*end = entry->symbols + entry->header.a_syms / sizeof (struct nlist);
entry->strings = (char *) alloca (entry->string_size);
read_entry_strings (file_open (entry), entry);
fprintf (outfile, "\nLocal symbols of ");
print_file_name (entry, outfile);
fprintf (outfile, ":\n\n");
for (p = entry->symbols; p < end; p++)
/* If this is a definition,
update it if necessary by this file's start address. */
if (!(p->n_type & (N_STAB | N_EXT)))
fprintf (outfile, " %s: 0x%x\n",
entry->strings + p->n_un.n_strx, p->n_value);
entry->strings = 0; /* All done with them. */
}
/* Static vars for do_warnings and subroutines of it */
int list_unresolved_refs; /* List unresolved refs */
int list_warning_symbols; /* List warning syms */
int list_multiple_defs; /* List multiple definitions */
/*
* Structure for communication between do_file_warnings and it's
* helper routines. Will in practice be an array of three of these:
* 0) Current line, 1) Next line, 2) Source file info.
*/
struct line_debug_entry
{
int line;
char *filename;
struct nlist *sym;
};
void qsort ();
/*
* Helper routines for do_file_warnings.
*/
/* Return an integer less than, equal to, or greater than 0 as per the
relation between the two relocation entries. Used by qsort. */
int
relocation_entries_relation (rel1, rel2)
struct relocation_info *rel1, *rel2;
{
return RELOC_ADDRESS(rel1) - RELOC_ADDRESS(rel2);
}
/* Moves to the next debugging symbol in the file. USE_DATA_SYMBOLS
determines the type of the debugging symbol to look for (DSLINE or
SLINE). STATE_POINTER keeps track of the old and new locatiosn in
the file. It assumes that state_pointer[1] is valid; ie
that it.sym points into some entry in the symbol table. If
state_pointer[1].sym == 0, this routine should not be called. */
int
next_debug_entry (use_data_symbols, state_pointer)
register int use_data_symbols;
/* Next must be passed by reference! */
struct line_debug_entry state_pointer[3];
{
register struct line_debug_entry
*current = state_pointer,
*next = state_pointer + 1,
/* Used to store source file */
*source = state_pointer + 2;
struct file_entry *entry = (struct file_entry *) source->sym;
current->sym = next->sym;
current->line = next->line;
current->filename = next->filename;
while (++(next->sym) < (entry->symbols
+ entry->header.a_syms/sizeof (struct nlist)))
{
/* n_type is a char, and N_SOL, N_EINCL and N_BINCL are > 0x80, so
* may look negative...therefore, must mask to low bits
*/
switch (next->sym->n_type & 0xff)
{
case N_SLINE:
if (use_data_symbols) continue;
next->line = next->sym->n_desc;
return 1;
case N_DSLINE:
if (!use_data_symbols) continue;
next->line = next->sym->n_desc;
return 1;
#ifdef HAVE_SUN_STABS
case N_EINCL:
next->filename = source->filename;
continue;
#endif
case N_SO:
source->filename = next->sym->n_un.n_strx + entry->strings;
source->line++;
#ifdef HAVE_SUN_STABS
case N_BINCL:
#endif
case N_SOL:
next->filename
= next->sym->n_un.n_strx + entry->strings;
default:
continue;
}
}
next->sym = (struct nlist *) 0;
return 0;
}
/* Create a structure to save the state of a scan through the debug
symbols. USE_DATA_SYMBOLS is set if we should be scanning for
DSLINE's instead of SLINE's. entry is the file entry which points
at the symbols to use. */
struct line_debug_entry *
init_debug_scan (use_data_symbols, entry)
int use_data_symbols;
struct file_entry *entry;
{
struct line_debug_entry
*state_pointer
= (struct line_debug_entry *)
xmalloc (3 * sizeof (struct line_debug_entry));
register struct line_debug_entry
*current = state_pointer,
*next = state_pointer + 1,
*source = state_pointer + 2; /* Used to store source file */
struct nlist *tmp;
for (tmp = entry->symbols;
tmp < (entry->symbols
+ entry->header.a_syms/sizeof (struct nlist));
tmp++)
if (tmp->n_type == (int) N_SO)
break;
if (tmp >= (entry->symbols
+ entry->header.a_syms/sizeof (struct nlist)))
{
/* I believe this translates to "We lose" */
current->filename = next->filename = entry->filename;
current->line = next->line = -1;
current->sym = next->sym = (struct nlist *) 0;
return state_pointer;
}
next->line = source->line = 0;
next->filename = source->filename
= (tmp->n_un.n_strx + entry->strings);
source->sym = (struct nlist *) entry;
next->sym = tmp;
next_debug_entry (use_data_symbols, state_pointer); /* To setup next */
if (!next->sym) /* No line numbers for this section; */
/* setup output results as appropriate */
{
if (source->line)
{
current->filename = source->filename = entry->filename;
current->line = -1; /* Don't print lineno */
}
else
{
current->filename = source->filename;
current->line = 0;
}
return state_pointer;
}
next_debug_entry (use_data_symbols, state_pointer); /* To setup current */
return state_pointer;
}
/* Takes an ADDRESS (in either text or data space) and a STATE_POINTER
which describes the current location in the implied scan through
the debug symbols within the file which ADDRESS is within, and
returns the source line number which corresponds to ADDRESS. */
int
address_to_line (address, state_pointer)
unsigned long address;
/* Next must be passed by reference! */
struct line_debug_entry state_pointer[3];
{
struct line_debug_entry
*current = state_pointer,
*next = state_pointer + 1;
struct line_debug_entry *tmp_pointer;
int use_data_symbols;
if (next->sym)
use_data_symbols = (next->sym->n_type & N_TYPE) == N_DATA;
else
return current->line;
/* Go back to the beginning if we've already passed it. */
if (current->sym->n_value > address)
{
tmp_pointer = init_debug_scan (use_data_symbols,
(struct file_entry *)
((state_pointer + 2)->sym));
state_pointer[0] = tmp_pointer[0];
state_pointer[1] = tmp_pointer[1];
state_pointer[2] = tmp_pointer[2];
free (tmp_pointer);
}
/* If we're still in a bad way, return -1, meaning invalid line. */
if (current->sym->n_value > address)
return -1;
while (next->sym
&& next->sym->n_value <= address
&& next_debug_entry (use_data_symbols, state_pointer))
;
return current->line;
}
/* Macros for manipulating bitvectors. */
#define BIT_SET_P(bv, index) ((bv)[(index) >> 3] & 1 << ((index) & 0x7))
#define SET_BIT(bv, index) ((bv)[(index) >> 3] |= 1 << ((index) & 0x7))
/* This routine will scan through the relocation data of file ENTRY,
printing out references to undefined symbols and references to
symbols defined in files with N_WARNING symbols. If DATA_SEGMENT
is non-zero, it will scan the data relocation segment (and use
N_DSLINE symbols to track line number); otherwise it will scan the
text relocation segment. Warnings will be printed on the output
stream OUTFILE. Eventually, every nlist symbol mapped through will
be marked in the NLIST_BITVECTOR, so we don't repeat ourselves when
we scan the nlists themselves. */
do_relocation_warnings (entry, data_segment, outfile, nlist_bitvector)
struct file_entry *entry;
int data_segment;
FILE *outfile;
unsigned char *nlist_bitvector;
{
struct relocation_info
*reloc_start = data_segment ? entry->datarel : entry->textrel,
*reloc;
int reloc_size
= ((data_segment ? entry->header.a_drsize : entry->header.a_trsize)
/ sizeof (struct relocation_info));
int start_of_segment
= (data_segment ? entry->data_start_address : entry->text_start_address);
struct nlist *start_of_syms = entry->symbols;
struct line_debug_entry *state_pointer
= init_debug_scan (data_segment != 0, entry);
register struct line_debug_entry
*current = state_pointer;
/* Assigned to generally static values; should not be written into. */
char *errfmt;
/* Assigned to alloca'd values cand copied into; should be freed
when done. */
char *errmsg;
int invalidate_line_number;
/* We need to sort the relocation info here. Sheesh, so much effort
for one lousy error optimization. */
qsort (reloc_start, reloc_size, sizeof (struct relocation_info),
relocation_entries_relation);
for (reloc = reloc_start;
reloc < (reloc_start + reloc_size);
reloc++)
{
register struct nlist *s;
register symbol *g;
/* If the relocation isn't resolved through a symbol, continue */
if (!RELOC_EXTERN_P(reloc))
continue;
s = &(entry->symbols[RELOC_SYMBOL(reloc)]);
/* Local symbols shouldn't ever be used by relocation info, so
the next should be safe.
This is, of course, wrong. References to local BSS symbols can be
the targets of relocation info, and they can (must) be
resolved through symbols. However, these must be defined properly,
(the assembler would have caught it otherwise), so we can
ignore these cases. */
if (!(s->n_type & N_EXT))
continue;
g = (symbol *) s->n_un.n_name;
errmsg = 0;
if (!g->defined && list_unresolved_refs) /* Reference */
{
/* Mark as being noted by relocation warning pass. */
SET_BIT (nlist_bitvector, s - start_of_syms);
if (g->undef_refs >= MAX_UREFS_PRINTED) /* Listed too many */
continue;
/* Undefined symbol which we should mention */
if (++(g->undef_refs) == MAX_UREFS_PRINTED)
{
errfmt = "More undefined symbol %s refs follow";
invalidate_line_number = 1;
}
else
{
errfmt = "Undefined symbol %s referenced from %s segment";
invalidate_line_number = 0;
}
}
else /* Defined */
{
/* Potential symbol warning here */
if (!g->warning) continue;
/* Mark as being noted by relocation warning pass. */
SET_BIT (nlist_bitvector, s - start_of_syms);
errfmt = 0;
errmsg = g->warning;
invalidate_line_number = 0;
}
/* If errfmt == 0, errmsg has already been defined. */
if (errfmt != 0)
{
char *nm;
if (demangler == NULL || (nm = (*demangler)(g->name)) == NULL)
nm = g->name;
errmsg = (char *) xmalloc (strlen (errfmt) + strlen (nm) + 1);
sprintf (errmsg, errfmt, nm, data_segment ? "data" : "text");
if (nm != g->name)
free (nm);
}
address_to_line (RELOC_ADDRESS (reloc) + start_of_segment,
state_pointer);
if (current->line >=0)
fprintf (outfile, "%s:%d: %s\n", current->filename,
invalidate_line_number ? 0 : current->line, errmsg);
else
fprintf (outfile, "%s: %s\n", current->filename, errmsg);
if (errfmt != 0)
free (errmsg);
}
free (state_pointer);
}
/* Print on OUTFILE a list of all warnings generated by references
and/or definitions in the file ENTRY. List source file and line
number if possible, just the .o file if not. */
void
do_file_warnings (entry, outfile)
struct file_entry *entry;
FILE *outfile;
{
int number_of_syms = entry->header.a_syms / sizeof (struct nlist);
unsigned char *nlist_bitvector
= (unsigned char *) alloca ((number_of_syms >> 3) + 1);
struct line_debug_entry *text_scan, *data_scan;
int i;
char *errfmt, *file_name;
int line_number;
int dont_allow_symbol_name;
bzero (nlist_bitvector, (number_of_syms >> 3) + 1);
/* Read in the files strings if they aren't available */
if (!entry->strings)
{
int desc;
entry->strings = (char *) alloca (entry->string_size);
desc = file_open (entry);
read_entry_strings (desc, entry);
}
read_file_relocation (entry);
/* Do text warnings based on a scan through the relocation info. */
do_relocation_warnings (entry, 0, outfile, nlist_bitvector);
/* Do data warnings based on a scan through the relocation info. */
do_relocation_warnings (entry, 1, outfile, nlist_bitvector);
/* Scan through all of the nlist entries in this file and pick up
anything that the scan through the relocation stuff didn't. */
text_scan = init_debug_scan (0, entry);
data_scan = init_debug_scan (1, entry);
for (i = 0; i < number_of_syms; i++)
{
struct nlist *s;
struct glosym *g;
s = entry->symbols + i;
if (!(s->n_type & N_EXT))
continue;
g = (symbol *) s->n_un.n_name;
dont_allow_symbol_name = 0;
if (list_multiple_defs && g->multiply_defined)
{
errfmt = "Definition of symbol %s (multiply defined)";
switch (s->n_type)
{
case N_TEXT | N_EXT:
line_number = address_to_line (s->n_value, text_scan);
file_name = text_scan[0].filename;
break;
case N_DATA | N_EXT:
line_number = address_to_line (s->n_value, data_scan);
file_name = data_scan[0].filename;
break;
case N_SETA | N_EXT:
case N_SETT | N_EXT:
case N_SETD | N_EXT:
case N_SETB | N_EXT:
if (g->multiply_defined == 2)
continue;
errfmt = "First set element definition of symbol %s (multiply defined)";
break;
default:
continue; /* Don't print out multiple defs
at references. */
}
}
else if (BIT_SET_P (nlist_bitvector, i))
continue;
else if (list_unresolved_refs && !g->defined)
{
if (g->undef_refs >= MAX_UREFS_PRINTED)
continue;
if (++(g->undef_refs) == MAX_UREFS_PRINTED)
errfmt = "More undefined \"%s\" refs follow";
else
errfmt = "Undefined symbol \"%s\" referenced";
line_number = -1;
}
else if (g->warning)
{
/* There are two cases in which we don't want to
do this. The first is if this is a definition instead of
a reference. The second is if it's the reference used by
the warning stabs itself. */
if (s->n_type != (N_EXT | N_UNDF)
|| (i && (s-1)->n_type == N_WARNING))
continue;
errfmt = g->warning;
line_number = -1;
dont_allow_symbol_name = 1;
}
else
continue;
if (line_number == -1)
fprintf (outfile, "%s: ", entry->filename);
else
fprintf (outfile, "%s:%d: ", file_name, line_number);
if (dont_allow_symbol_name)
fprintf (outfile, "%s", errfmt);
else
{
char *nm;
if (demangler != NULL && (nm = (*demangler)(g->name)) != NULL)
{
fprintf (outfile, errfmt, nm);
free (nm);
}
else
fprintf (outfile, errfmt, g->name);
}
fputc ('\n', outfile);
}
free (text_scan);
free (data_scan);
entry->strings = 0; /* Since it will dissapear anyway. */
}
do_warnings (outfile)
FILE *outfile;
{
list_unresolved_refs = !relocatable_output && undefined_global_sym_count;
list_warning_symbols = warning_count;
list_multiple_defs = multiple_def_count != 0;
if (!(list_unresolved_refs ||
list_warning_symbols ||
list_multiple_defs ))
/* No need to run this routine */
return;
each_file (do_file_warnings, outfile);
if (list_unresolved_refs || list_multiple_defs)
make_executable = 0;
}
/* Write the output file */
void
write_output ()
{
struct stat statbuf;
int filemode;
(void) unlink (output_filename);
outdesc = open (output_filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
if (outdesc < 0) perror_name (output_filename);
if (fstat (outdesc, &statbuf) < 0)
perror_name (output_filename);
filemode = statbuf.st_mode;
chmod (output_filename, filemode & ~0111);
/* Output the a.out header. */
write_header ();
/* Output the text and data segments, relocating as we go. */
write_text ();
write_data ();
/* Output the merged relocation info, if requested with `-r'. */
if (relocatable_output)
write_rel ();
/* Output the symbol table (both globals and locals). */
write_syms ();
/* Copy any GDB symbol segments from input files. */
write_symsegs ();
close (outdesc);
if (chmod (output_filename, filemode | 0111) == -1)
perror_name (output_filename);
}
void modify_location (), perform_relocation (), copy_text (), copy_data ();
void
write_header ()
{
N_SET_MAGIC (outheader, magic);
outheader.a_text = text_size;
#ifdef sequent
outheader.a_text += N_ADDRADJ (outheader);
if (entry_symbol == 0)
entry_symbol = getsym("start");
#endif
outheader.a_data = data_size;
outheader.a_bss = bss_size;
outheader.a_entry = (entry_symbol ? entry_symbol->value
: text_start + entry_offset);
if (screwballmode) {
N_SET_MAGIC (outheader, ZMAGIC);
outheader.a_text = 0;
outheader.a_data = text_size + data_size;
outheader.a_entry = (entry_symbol ? entry_symbol->value
: sizeof(struct exec));
}
#ifdef COFF_ENCAPSULATE
if (need_coff_header)
{
/* We are encapsulating BSD format within COFF format. */
struct coffscn *tp, *dp, *bp;
tp = &coffheader.scns[0];
dp = &coffheader.scns[1];
bp = &coffheader.scns[2];
strcpy (tp->s_name, ".text");
tp->s_paddr = text_start;
tp->s_vaddr = text_start;
tp->s_size = text_size;
tp->s_scnptr = sizeof (struct coffheader) + sizeof (struct exec);
tp->s_relptr = 0;
tp->s_lnnoptr = 0;
tp->s_nreloc = 0;
tp->s_nlnno = 0;
tp->s_flags = 0x20;
strcpy (dp->s_name, ".data");
dp->s_paddr = data_start;
dp->s_vaddr = data_start;
dp->s_size = data_size;
dp->s_scnptr = tp->s_scnptr + tp->s_size;
dp->s_relptr = 0;
dp->s_lnnoptr = 0;
dp->s_nreloc = 0;
dp->s_nlnno = 0;
dp->s_flags = 0x40;
strcpy (bp->s_name, ".bss");
bp->s_paddr = dp->s_vaddr + dp->s_size;
bp->s_vaddr = bp->s_paddr;
bp->s_size = bss_size;
bp->s_scnptr = 0;
bp->s_relptr = 0;
bp->s_lnnoptr = 0;
bp->s_nreloc = 0;
bp->s_nlnno = 0;
bp->s_flags = 0x80;
coffheader.f_magic = COFF_MAGIC;
coffheader.f_nscns = 3;
/* store an unlikely time so programs can
* tell that there is a bsd header
*/
coffheader.f_timdat = 1;
coffheader.f_symptr = 0;
coffheader.f_nsyms = 0;
coffheader.f_opthdr = 28;
coffheader.f_flags = 0x103;
/* aouthdr */
coffheader.magic = ZMAGIC;
coffheader.vstamp = 0;
coffheader.tsize = tp->s_size;
coffheader.dsize = dp->s_size;
coffheader.bsize = bp->s_size;
coffheader.entry = outheader.a_entry;
coffheader.text_start = tp->s_vaddr;
coffheader.data_start = dp->s_vaddr;
}
#endif
#ifdef INITIALIZE_HEADER
INITIALIZE_HEADER;
#endif
if (strip_symbols == STRIP_ALL)
nsyms = 0;
else
{
nsyms = (defined_global_sym_count
+ undefined_global_sym_count);
if (discard_locals == DISCARD_L)
nsyms += non_L_local_sym_count;
else if (discard_locals == DISCARD_NONE)
nsyms += local_sym_count;
/* One extra for following reference on indirects */
if (relocatable_output)
nsyms += set_symbol_count + global_indirect_count;
}
if (strip_symbols == STRIP_NONE)
nsyms += debugger_sym_count;
outheader.a_syms = nsyms * sizeof (struct nlist);
if (relocatable_output)
{
outheader.a_trsize = text_reloc_size;
outheader.a_drsize = data_reloc_size;
}
else
{
outheader.a_trsize = 0;
outheader.a_drsize = 0;
}
#ifdef COFF_ENCAPSULATE
if (need_coff_header)
mywrite (&coffheader, sizeof coffheader, 1, outdesc);
#endif
mywrite (&outheader, sizeof (struct exec), 1, outdesc);
if (screwballmode)
N_SET_MAGIC (outheader, OMAGIC);
/* Output whatever padding is required in the executable file
between the header and the start of the text. */
#ifndef COFF_ENCAPSULATE
padfile (N_TXTOFF (outheader) - sizeof outheader, outdesc);
#endif
}
/* Relocate the text segment of each input file
and write to the output file. */
void
write_text ()
{
if (trace_files)
fprintf (stderr, "Copying and relocating text:\n\n");
each_full_file (copy_text, 0);
file_close ();
if (trace_files)
fprintf (stderr, "\n");
padfile (text_pad, outdesc);
}
int
text_offset (entry)
struct file_entry *entry;
{
return entry->starting_offset + N_TXTOFF (entry->header);
}
/* Read in all of the relocation information */
void
read_relocation ()
{
each_full_file (read_file_relocation, 0);
}
/* Read in the relocation sections of ENTRY if necessary */
void
read_file_relocation (entry)
struct file_entry *entry;
{
register struct relocation_info *reloc;
int desc;
int read_return;
desc = -1;
if (!entry->textrel)
{
reloc = (struct relocation_info *) xmalloc (entry->header.a_trsize);
desc = file_open (entry);
lseek (desc,
text_offset (entry) + entry->header.a_text + entry->header.a_data,
L_SET);
if (entry->header.a_trsize != (read_return = read (desc, reloc, entry->header.a_trsize)))
{
fprintf (stderr, "Return from read: %d\n", read_return);
fatal_with_file ("premature eof in text relocation of ", entry);
}
entry->textrel = reloc;
}
if (!entry->datarel)
{
reloc = (struct relocation_info *) xmalloc (entry->header.a_drsize);
if (desc == -1) desc = file_open (entry);
lseek (desc,
text_offset (entry) + entry->header.a_text
+ entry->header.a_data + entry->header.a_trsize,
L_SET);
if (entry->header.a_drsize != read (desc, reloc, entry->header.a_drsize))
fatal_with_file ("premature eof in data relocation of ", entry);
entry->datarel = reloc;
}
}
/* Read the text segment contents of ENTRY, relocate them,
and write the result to the output file.
If `-r', save the text relocation for later reuse. */
void
copy_text (entry)
struct file_entry *entry;
{
register char *bytes;
register int desc;
register struct relocation_info *reloc;
if (trace_files)
prline_file_name (entry, stderr);
desc = file_open (entry);
/* Allocate space for the file's text section */
bytes = (char *) alloca (entry->header.a_text);
/* Deal with relocation information however is appropriate */
if (entry->textrel) reloc = entry->textrel;
else if (relocatable_output)
{
read_file_relocation (entry);
reloc = entry->textrel;
}
else
{
reloc = (struct relocation_info *) alloca (entry->header.a_trsize);
lseek (desc, text_offset (entry) + entry->header.a_text + entry->header.a_data, 0);
if (entry->header.a_trsize != read (desc, reloc, entry->header.a_trsize))
fatal_with_file ("premature eof in text relocation of ", entry);
}
/* Read the text section into core. */
lseek (desc, text_offset (entry), 0);
if (entry->header.a_text != read (desc, bytes, entry->header.a_text))
fatal_with_file ("premature eof in text section of ", entry);
/* Relocate the text according to the text relocation. */
perform_relocation (bytes, entry->text_start_address, entry->header.a_text,
reloc, entry->header.a_trsize, entry);
/* Write the relocated text to the output file. */
mywrite (bytes, 1, entry->header.a_text, outdesc);
}
/* Relocate the data segment of each input file
and write to the output file. */
void
write_data ()
{
if (trace_files)
fprintf (stderr, "Copying and relocating data:\n\n");
each_full_file (copy_data, 0);
file_close ();
/* Write out the set element vectors. See digest symbols for
description of length of the set vector section. */
if (set_vector_count)
mywrite (set_vectors, 2 * set_symbol_count + set_vector_count,
sizeof (unsigned long), outdesc);
if (trace_files)
fprintf (stderr, "\n");
padfile (data_pad, outdesc);
}
/* Read the data segment contents of ENTRY, relocate them,
and write the result to the output file.
If `-r', save the data relocation for later reuse.
See comments in `copy_text'. */
void
copy_data (entry)
struct file_entry *entry;
{
register struct relocation_info *reloc;
register char *bytes;
register int desc;
if (trace_files)
prline_file_name (entry, stderr);
desc = file_open (entry);
bytes = (char *) alloca (entry->header.a_data);
if (entry->datarel) reloc = entry->datarel;
else if (relocatable_output) /* Will need this again */
{
read_file_relocation (entry);
reloc = entry->datarel;
}
else
{
reloc = (struct relocation_info *) alloca (entry->header.a_drsize);
lseek (desc, text_offset (entry) + entry->header.a_text
+ entry->header.a_data + entry->header.a_trsize,
0);
if (entry->header.a_drsize != read (desc, reloc, entry->header.a_drsize))
fatal_with_file ("premature eof in data relocation of ", entry);
}
lseek (desc, text_offset (entry) + entry->header.a_text, 0);
if (entry->header.a_data != read (desc, bytes, entry->header.a_data))
fatal_with_file ("premature eof in data section of ", entry);
perform_relocation (bytes, entry->data_start_address - entry->header.a_text,
entry->header.a_data, reloc, entry->header.a_drsize, entry);
mywrite (bytes, 1, entry->header.a_data, outdesc);
}
/* Relocate ENTRY's text or data section contents.
DATA is the address of the contents, in core.
DATA_SIZE is the length of the contents.
PC_RELOCATION is the difference between the address of the contents
in the output file and its address in the input file.
RELOC_INFO is the address of the relocation info, in core.
RELOC_SIZE is its length in bytes. */
/* This version is about to be severly hacked by Randy. Hope it
works afterwards. */
void
perform_relocation (data, pc_relocation, data_size, reloc_info, reloc_size, entry)
char *data;
struct relocation_info *reloc_info;
struct file_entry *entry;
int pc_relocation;
int data_size;
int reloc_size;
{
register struct relocation_info *p = reloc_info;
struct relocation_info *end
= reloc_info + reloc_size / sizeof (struct relocation_info);
int text_relocation = entry->text_start_address;
int data_relocation = entry->data_start_address - entry->header.a_text;
int bss_relocation
= entry->bss_start_address - entry->header.a_text - entry->header.a_data;
for (; p < end; p++)
{
register int relocation = 0;
register int addr = RELOC_ADDRESS(p);
register unsigned int mask = 0;
if (addr >= data_size)
fatal_with_file ("relocation address out of range in ", entry);
if (RELOC_EXTERN_P(p))
{
int symindex = RELOC_SYMBOL (p) * sizeof (struct nlist);
symbol *sp = ((symbol *)
(((struct nlist *)
(((char *)entry->symbols) + symindex))
->n_un.n_name));
#ifdef N_INDR
/* Resolve indirection */
if ((sp->defined & ~N_EXT) == N_INDR)
sp = (symbol *) sp->value;
#endif
if (symindex >= entry->header.a_syms)
fatal_with_file ("relocation symbolnum out of range in ", entry);
/* If the symbol is undefined, leave it at zero. */
if (! sp->defined)
relocation = 0;
else
relocation = sp->value;
}
else switch (RELOC_TYPE(p))
{
case N_TEXT:
case N_TEXT | N_EXT:
relocation = text_relocation;
break;
case N_DATA:
case N_DATA | N_EXT:
/* A word that points to beginning of the the data section
initially contains not 0 but rather the "address" of that section
in the input file, which is the length of the file's text. */
relocation = data_relocation;
break;
case N_BSS:
case N_BSS | N_EXT:
/* Similarly, an input word pointing to the beginning of the bss
initially contains the length of text plus data of the file. */
relocation = bss_relocation;
break;
case N_ABS:
case N_ABS | N_EXT:
/* Don't know why this code would occur, but apparently it does. */
break;
default:
fatal_with_file ("nonexternal relocation code invalid in ", entry);
}
#ifdef RELOC_ADD_EXTRA
relocation += RELOC_ADD_EXTRA(p);
if (relocatable_output)
{
/* Non-PC relative relocations which are absolute
or which have become non-external now have fixed
relocations. Set the ADD_EXTRA of this relocation
to be the relocation we have now determined. */
if (! RELOC_PCREL_P (p))
{
if ((int)p->r_type <= RELOC_32
|| RELOC_EXTERN_P (p) == 0)
RELOC_ADD_EXTRA (p) = relocation;
}
/* External PC-relative relocations continue to move around;
update their relocations by the amount they have moved
so far. */
else if (RELOC_EXTERN_P (p))
RELOC_ADD_EXTRA (p) -= pc_relocation;
continue;
}
#endif
if (RELOC_PCREL_P(p))
relocation -= pc_relocation;
relocation >>= RELOC_VALUE_RIGHTSHIFT(p);
/* Unshifted mask for relocation */
mask = 1 << RELOC_TARGET_BITSIZE(p) - 1;
mask |= mask - 1;
relocation &= mask;
/* Shift everything up to where it's going to be used */
relocation <<= RELOC_TARGET_BITPOS(p);
mask <<= RELOC_TARGET_BITPOS(p);
switch (RELOC_TARGET_SIZE(p))
{
case 0:
if (RELOC_MEMORY_SUB_P(p))
relocation -= mask & *(char *) (data + addr);
else if (RELOC_MEMORY_ADD_P(p))
relocation += mask & *(char *) (data + addr);
*(char *) (data + addr) &= ~mask;
*(char *) (data + addr) |= relocation;
break;
case 1:
#ifdef tahoe
if (((int) data + addr & 1) == 0)
{
#endif
if (RELOC_MEMORY_SUB_P(p))
relocation -= mask & *(short *) (data + addr);
else if (RELOC_MEMORY_ADD_P(p))
relocation += mask & *(short *) (data + addr);
*(short *) (data + addr) &= ~mask;
*(short *) (data + addr) |= relocation;
#ifdef tahoe
}
/*
* The CCI Power 6 (aka Tahoe) architecture has byte-aligned
* instruction operands but requires data accesses to be aligned.
* Brain-damage...
*/
else
{
unsigned char *da = (unsigned char *) (data + addr);
unsigned short s = da[0] << 8 | da[1];
if (RELOC_MEMORY_SUB_P(p))
relocation -= mask & s;
else if (RELOC_MEMORY_ADD_P(p))
relocation += mask & s;
s &= ~mask;
s |= relocation;
da[0] = s >> 8;
da[1] = s;
}
#endif
break;
case 2:
#ifndef _CROSS_TARGET_ARCH
#ifdef tahoe
if (((int) data + addr & 3) == 0)
{
#endif
if (RELOC_MEMORY_SUB_P(p))
relocation -= mask & *(long *) (data + addr);
else if (RELOC_MEMORY_ADD_P(p))
relocation += mask & *(long *) (data + addr);
*(long *) (data + addr) &= ~mask;
*(long *) (data + addr) |= relocation;
#ifdef tahoe
}
else
{
unsigned char *da = (unsigned char *) (data + addr);
unsigned long l = da[0] << 24 | da[1] << 16 | da[2] << 8 | da[3];
if (RELOC_MEMORY_SUB_P(p))
relocation -= mask & l;
else if (RELOC_MEMORY_ADD_P(p))
relocation += mask & l;
l &= ~mask;
l |= relocation;
da[0] = l >> 24;
da[1] = l >> 16;
da[2] = l >> 8;
da[3] = l;
}
#endif
#else
/* Handle long word alignment requirements of SPARC architecture */
/* WARNING: This fix makes an assumption on byte ordering */
/* Marc Ullman, Stanford University Nov. 1 1989 */
if (RELOC_MEMORY_SUB_P(p)) {
relocation -= mask &
((*(unsigned short *) (data + addr) << 16) |
*(unsigned short *) (data + addr + 2));
} else if (RELOC_MEMORY_ADD_P(p)) {
relocation += mask &
((*(unsigned short *) (data + addr) << 16) |
*(unsigned short *) (data + addr + 2));
}
*(unsigned short *) (data + addr) &= (~mask >> 16);
*(unsigned short *) (data + addr + 2) &= (~mask & 0xffff);
*(unsigned short *) (data + addr) |= (relocation >> 16);
*(unsigned short *) (data + addr + 2) |= (relocation & 0xffff);
#endif
break;
default:
fatal_with_file ("Unimplemented relocation field length in ", entry);
}
}
}
/* For relocatable_output only: write out the relocation,
relocating the addresses-to-be-relocated. */
void coptxtrel (), copdatrel ();
void
write_rel ()
{
register int i;
register int count = 0;
if (trace_files)
fprintf (stderr, "Writing text relocation:\n\n");
/* Assign each global symbol a sequence number, giving the order
in which `write_syms' will write it.
This is so we can store the proper symbolnum fields
in relocation entries we write. */
for (i = 0; i < TABSIZE; i++)
{
symbol *sp;
for (sp = symtab[i]; sp; sp = sp->link)
if (sp->referenced || sp->defined)
{
sp->def_count = count++;
/* Leave room for the reference required by N_INDR, if
necessary. */
if ((sp->defined & ~N_EXT) == N_INDR)
count++;
}
}
/* Correct, because if (relocatable_output), we will also be writing
whatever indirect blocks we have. */
if (count != defined_global_sym_count
+ undefined_global_sym_count + global_indirect_count)
fatal ("internal error");
/* Write out the relocations of all files, remembered from copy_text. */
each_full_file (coptxtrel, 0);
if (trace_files)
fprintf (stderr, "\nWriting data relocation:\n\n");
each_full_file (copdatrel, 0);
if (trace_files)
fprintf (stderr, "\n");
}
void
coptxtrel (entry)
struct file_entry *entry;
{
register struct relocation_info *p, *end;
register int reloc = entry->text_start_address;
p = entry->textrel;
end = (struct relocation_info *) (entry->header.a_trsize + (char *) p);
while (p < end)
{
RELOC_ADDRESS(p) += reloc;
if (RELOC_EXTERN_P(p))
{
register int symindex = RELOC_SYMBOL(p) * sizeof (struct nlist);
symbol *symptr = ((symbol *)
(((struct nlist *)
(((char *)entry->symbols) + symindex))
->n_un.n_name));
if (symindex >= entry->header.a_syms)
fatal_with_file ("relocation symbolnum out of range in ", entry);
#ifdef N_INDR
/* Resolve indirection. */
if ((symptr->defined & ~N_EXT) == N_INDR)
symptr = (symbol *) symptr->value;
#endif
/* If the symbol is now defined, change the external relocation
to an internal one. */
if (symptr->defined)
{
RELOC_EXTERN_P(p) = 0;
RELOC_SYMBOL(p) = (symptr->defined & N_TYPE);
#ifdef RELOC_ADD_EXTRA
/* If we aren't going to be adding in the value in
memory on the next pass of the loader, then we need
to add it in from the relocation entry. Otherwise
the work we did in this pass is lost. */
if (!RELOC_MEMORY_ADD_P(p))
RELOC_ADD_EXTRA (p) += symptr->value;
#endif
}
else
/* Debugger symbols come first, so have to start this
after them. */
RELOC_SYMBOL(p) = (symptr->def_count + nsyms
- defined_global_sym_count
- undefined_global_sym_count
- global_indirect_count);
}
p++;
}
mywrite (entry->textrel, 1, entry->header.a_trsize, outdesc);
}
void
copdatrel (entry)
struct file_entry *entry;
{
register struct relocation_info *p, *end;
/* Relocate the address of the relocation.
Old address is relative to start of the input file's data section.
New address is relative to start of the output file's data section. */
register int reloc = entry->data_start_address - text_size;
p = entry->datarel;
end = (struct relocation_info *) (entry->header.a_drsize + (char *) p);
while (p < end)
{
RELOC_ADDRESS(p) += reloc;
if (RELOC_EXTERN_P(p))
{
register int symindex = RELOC_SYMBOL(p) * sizeof (struct nlist);
symbol *symptr = ((symbol *)
(((struct nlist *)
(((char *)entry->symbols) + symindex))
->n_un.n_name));
int symtype;
if (symindex >= entry->header.a_syms)
fatal_with_file ("relocation symbolnum out of range in ", entry);
#ifdef N_INDR
/* Resolve indirection. */
if ((symptr->defined & ~N_EXT) == N_INDR)
symptr = (symbol *) symptr->value;
#endif
symtype = symptr->defined & N_TYPE;
if (force_common_definition
|| symtype == N_DATA || symtype == N_TEXT || symtype == N_ABS)
{
RELOC_EXTERN_P(p) = 0;
RELOC_SYMBOL(p) = symtype;
}
else
/* Debugger symbols come first, so have to start this
after them. */
RELOC_SYMBOL(p)
= (((symbol *)
(((struct nlist *)
(((char *)entry->symbols) + symindex))
->n_un.n_name))
->def_count
+ nsyms - defined_global_sym_count
- undefined_global_sym_count
- global_indirect_count);
}
p++;
}
mywrite (entry->datarel, 1, entry->header.a_drsize, outdesc);
}
void write_file_syms ();
void write_string_table ();
/* Offsets and current lengths of symbol and string tables in output file. */
int symbol_table_offset;
int symbol_table_len;
/* Address in output file where string table starts. */
int string_table_offset;
/* Offset within string table
where the strings in `strtab_vector' should be written. */
int string_table_len;
/* Total size of string table strings allocated so far,
including strings in `strtab_vector'. */
int strtab_size;
/* Vector whose elements are strings to be added to the string table. */
char **strtab_vector;
/* Vector whose elements are the lengths of those strings. */
int *strtab_lens;
/* Index in `strtab_vector' at which the next string will be stored. */
int strtab_index;
/* Add the string NAME to the output file string table.
Record it in `strtab_vector' to be output later.
Return the index within the string table that this string will have. */
int
assign_string_table_index (name)
char *name;
{
register int index = strtab_size;
register int len = strlen (name) + 1;
strtab_size += len;
strtab_vector[strtab_index] = name;
strtab_lens[strtab_index++] = len;
return index;
}
FILE *outstream = (FILE *) 0;
/* Write the contents of `strtab_vector' into the string table.
This is done once for each file's local&debugger symbols
and once for the global symbols. */
void
write_string_table ()
{
register int i;
lseek (outdesc, string_table_offset + string_table_len, 0);
if (!outstream)
outstream = fdopen (outdesc, "w");
for (i = 0; i < strtab_index; i++)
{
fwrite (strtab_vector[i], 1, strtab_lens[i], outstream);
string_table_len += strtab_lens[i];
}
fflush (outstream);
/* Report I/O error such as disk full. */
if (ferror (outstream))
perror_name (output_filename);
}
/* Write the symbol table and string table of the output file. */
void
write_syms ()
{
/* Number of symbols written so far. */
int syms_written = 0;
register int i;
register symbol *sp;
/* Buffer big enough for all the global symbols. One
extra struct for each indirect symbol to hold the extra reference
following. */
struct nlist *buf
= (struct nlist *) alloca ((defined_global_sym_count
+ undefined_global_sym_count
+ global_indirect_count)
* sizeof (struct nlist));
/* Pointer for storing into BUF. */
register struct nlist *bufp = buf;
/* Size of string table includes the bytes that store the size. */
strtab_size = sizeof strtab_size;
symbol_table_offset = N_SYMOFF (outheader);
symbol_table_len = 0;
string_table_offset = N_STROFF (outheader);
string_table_len = strtab_size;
if (strip_symbols == STRIP_ALL)
return;
/* Write the local symbols defined by the various files. */
each_file (write_file_syms, &syms_written);
file_close ();
/* Now write out the global symbols. */
/* Allocate two vectors that record the data to generate the string
table from the global symbols written so far. This must include
extra space for the references following indirect outputs. */
strtab_vector = (char **) alloca ((num_hash_tab_syms
+ global_indirect_count) * sizeof (char *));
strtab_lens = (int *) alloca ((num_hash_tab_syms
+ global_indirect_count) * sizeof (int));
strtab_index = 0;
/* Scan the symbol hash table, bucket by bucket. */
for (i = 0; i < TABSIZE; i++)
for (sp = symtab[i]; sp; sp = sp->link)
{
struct nlist nl;
nl.n_other = 0;
nl.n_desc = 0;
/* Compute a `struct nlist' for the symbol. */
if (sp->defined || sp->referenced)
{
/* common condition needs to be before undefined condition */
/* because unallocated commons are set undefined in */
/* digest_symbols */
if (sp->defined > 1) /* defined with known type */
{
/* If the target of an indirect symbol has been
defined and we are outputting an executable,
resolve the indirection; it's no longer needed */
if (!relocatable_output
&& ((sp->defined & N_TYPE) == N_INDR)
&& (((symbol *) sp->value)->defined > 1))
{
symbol *newsp = (symbol *) sp->value;
nl.n_type = newsp->defined;
nl.n_value = newsp->value;
}
else
{
nl.n_type = sp->defined;
if (sp->defined != (N_INDR | N_EXT))
nl.n_value = sp->value;
else
nl.n_value = 0;
}
}
else if (sp->max_common_size) /* defined as common but not allocated. */
{
/* happens only with -r and not -d */
/* write out a common definition */
nl.n_type = N_UNDF | N_EXT;
nl.n_value = sp->max_common_size;
}
else if (!sp->defined) /* undefined -- legit only if -r */
{
nl.n_type = N_UNDF | N_EXT;
nl.n_value = 0;
}
else
fatal ("internal error: %s defined in mysterious way", sp->name);
/* Allocate string table space for the symbol name. */
nl.n_un.n_strx = assign_string_table_index (sp->name);
/* Output to the buffer and count it. */
*bufp++ = nl;
syms_written++;
if (nl.n_type == (N_INDR | N_EXT))
{
struct nlist xtra_ref;
xtra_ref.n_type = N_EXT | N_UNDF;
xtra_ref.n_un.n_strx
= assign_string_table_index (((symbol *) sp->value)->name);
xtra_ref.n_other = 0;
xtra_ref.n_desc = 0;
xtra_ref.n_value = 0;
*bufp++ = xtra_ref;
syms_written++;
}
}
}
/* Output the buffer full of `struct nlist's. */
lseek (outdesc, symbol_table_offset + symbol_table_len, 0);
mywrite (buf, sizeof (struct nlist), bufp - buf, outdesc);
symbol_table_len += sizeof (struct nlist) * (bufp - buf);
if (syms_written != nsyms)
fatal ("internal error: wrong number of symbols written into output file", 0);
if (symbol_table_offset + symbol_table_len != string_table_offset)
fatal ("internal error: inconsistent symbol table length", 0);
/* Now the total string table size is known, so write it.
We are already positioned at the right place in the file. */
mywrite (&strtab_size, sizeof (int), 1, outdesc); /* we're at right place */
/* Write the strings for the global symbols. */
write_string_table ();
}
/* Write the local and debugger symbols of file ENTRY.
Increment *SYMS_WRITTEN_ADDR for each symbol that is written. */
/* Note that we do not combine identical names of local symbols.
dbx or gdb would be confused if we did that. */
void
write_file_syms (entry, syms_written_addr)
struct file_entry *entry;
int *syms_written_addr;
{
register struct nlist *p = entry->symbols;
register struct nlist *end = p + entry->header.a_syms / sizeof (struct nlist);
/* Buffer to accumulate all the syms before writing them.
It has one extra slot for the local symbol we generate here. */
struct nlist *buf
= (struct nlist *) alloca (entry->header.a_syms + sizeof (struct nlist));
register struct nlist *bufp = buf;
/* Upper bound on number of syms to be written here. */
int max_syms = (entry->header.a_syms / sizeof (struct nlist)) + 1;
/* Make tables that record, for each symbol, its name and its name's length.
The elements are filled in by `assign_string_table_index'. */
strtab_vector = (char **) alloca (max_syms * sizeof (char *));
strtab_lens = (int *) alloca (max_syms * sizeof (int));
strtab_index = 0;
/* Generate a local symbol for the start of this file's text. */
if (discard_locals != DISCARD_ALL)
{
struct nlist nl;
nl.n_type = N_FN | N_EXT;
nl.n_un.n_strx = assign_string_table_index (entry->local_sym_name);
nl.n_value = entry->text_start_address;
nl.n_desc = 0;
nl.n_other = 0;
*bufp++ = nl;
(*syms_written_addr)++;
entry->local_syms_offset = *syms_written_addr * sizeof (struct nlist);
}
/* Read the file's string table. */
entry->strings = (char *) alloca (entry->string_size);
read_entry_strings (file_open (entry), entry);
for (; p < end; p++)
{
register int type = p->n_type;
register int write = 0;
/* WRITE gets 1 for a non-global symbol that should be written. */
if (SET_ELEMENT_P (type)) /* This occurs even if global. These */
/* types of symbols are never written */
/* globally, though they are stored */
/* globally. */
write = relocatable_output;
else if (!(type & (N_STAB | N_EXT)))
/* ordinary local symbol */
write = ((discard_locals != DISCARD_ALL)
&& !(discard_locals == DISCARD_L &&
(p->n_un.n_strx + entry->strings)[0] == LPREFIX)
&& type != N_WARNING);
else if (!(type & N_EXT))
/* debugger symbol */
write = (strip_symbols == STRIP_NONE);
if (write)
{
/* If this symbol has a name,
allocate space for it in the output string table. */
if (p->n_un.n_strx)
p->n_un.n_strx = assign_string_table_index (p->n_un.n_strx
+ entry->strings);
/* Output this symbol to the buffer and count it. */
*bufp++ = *p;
(*syms_written_addr)++;
}
}
/* All the symbols are now in BUF; write them. */
lseek (outdesc, symbol_table_offset + symbol_table_len, 0);
mywrite (buf, sizeof (struct nlist), bufp - buf, outdesc);
symbol_table_len += sizeof (struct nlist) * (bufp - buf);
/* Write the string-table data for the symbols just written,
using the data in vectors `strtab_vector' and `strtab_lens'. */
write_string_table ();
entry->strings = 0; /* Since it will dissapear anyway. */
}
/* Copy any GDB symbol segments from the input files to the output file.
The contents of the symbol segment is copied without change
except that we store some information into the beginning of it. */
void write_file_symseg ();
void
write_symsegs ()
{
each_file (write_file_symseg, 0);
}
void
write_file_symseg (entry)
struct file_entry *entry;
{
char buffer[4096];
struct symbol_root root;
int indesc;
int len;
if (entry->symseg_offset == 0)
return;
/* This entry has a symbol segment. Read the root of the segment. */
indesc = file_open (entry);
lseek (indesc, entry->symseg_offset + entry->starting_offset, 0);
if (sizeof root != read (indesc, &root, sizeof root))
fatal_with_file ("premature end of file in symbol segment of ", entry);
/* Store some relocation info into the root. */
root.ldsymoff = entry->local_syms_offset;
root.textrel = entry->text_start_address;
root.datarel = entry->data_start_address - entry->header.a_text;
root.bssrel = entry->bss_start_address
- entry->header.a_text - entry->header.a_data;
root.databeg = entry->data_start_address - root.datarel;
root.bssbeg = entry->bss_start_address - root.bssrel;
/* Write the modified root into the output file. */
mywrite (&root, sizeof root, 1, outdesc);
/* Copy the rest of the symbol segment unchanged. */
if (entry->superfile)
{
/* Library member: number of bytes to copy is determined
from the member's total size. */
int total = entry->total_size - entry->symseg_offset - sizeof root;
while (total > 0)
{
len = read (indesc, buffer, min (sizeof buffer, total));
if (len != min (sizeof buffer, total))
fatal_with_file ("premature end of file in symbol segment of ", entry);
total -= len;
mywrite (buffer, len, 1, outdesc);
}
}
else
{
/* A separate file: copy until end of file. */
while (len = read (indesc, buffer, sizeof buffer))
{
mywrite (buffer, len, 1, outdesc);
if (len < sizeof buffer)
break;
}
}
file_close ();
}
/* Create the symbol table entries for `etext', `edata' and `end'. */
void
symtab_init ()
{
#ifndef nounderscore
edata_symbol = getsym ("_edata");
etext_symbol = getsym ("_etext");
end_symbol = getsym ("_end");
#else
edata_symbol = getsym ("edata");
etext_symbol = getsym ("etext");
end_symbol = getsym ("end");
#endif
#ifdef sun
{
symbol *dynamic_symbol = getsym ("__DYNAMIC");
dynamic_symbol->defined = N_ABS | N_EXT;
dynamic_symbol->referenced = 1;
dynamic_symbol->value = 0;
}
#endif
#ifdef sequent
{
symbol *_387_flt_symbol = getsym ("_387_flt");
_387_flt_symbol->defined = N_ABS | N_EXT;
_387_flt_symbol->referenced = 1;
_387_flt_symbol->value = 0;
}
#endif
edata_symbol->defined = N_DATA | N_EXT;
etext_symbol->defined = N_TEXT | N_EXT;
end_symbol->defined = N_BSS | N_EXT;
edata_symbol->referenced = 1;
etext_symbol->referenced = 1;
end_symbol->referenced = 1;
}
/* Compute the hash code for symbol name KEY. */
int
hash_string (key)
char *key;
{
register char *cp;
register int k;
cp = key;
k = 0;
while (*cp)
k = (((k << 1) + (k >> 14)) ^ (*cp++)) & 0x3fff;
return k;
}
/* Get the symbol table entry for the global symbol named KEY.
Create one if there is none. */
symbol *
getsym (key)
char *key;
{
register int hashval;
register symbol *bp;
/* Determine the proper bucket. */
hashval = hash_string (key) % TABSIZE;
/* Search the bucket. */
for (bp = symtab[hashval]; bp; bp = bp->link)
if (! strcmp (key, bp->name))
return bp;
/* Nothing was found; create a new symbol table entry. */
bp = (symbol *) xmalloc (sizeof (symbol));
bp->refs = 0;
bp->name = (char *) xmalloc (strlen (key) + 1);
strcpy (bp->name, key);
bp->defined = 0;
bp->referenced = 0;
bp->trace = 0;
bp->value = 0;
bp->max_common_size = 0;
bp->warning = 0;
bp->undef_refs = 0;
bp->multiply_defined = 0;
/* Add the entry to the bucket. */
bp->link = symtab[hashval];
symtab[hashval] = bp;
++num_hash_tab_syms;
return bp;
}
/* Like `getsym' but return 0 if the symbol is not already known. */
symbol *
getsym_soft (key)
char *key;
{
register int hashval;
register symbol *bp;
/* Determine which bucket. */
hashval = hash_string (key) % TABSIZE;
/* Search the bucket. */
for (bp = symtab[hashval]; bp; bp = bp->link)
if (! strcmp (key, bp->name))
return bp;
return 0;
}
/* Report a fatal error.
STRING is a printf format string and ARG is one arg for it. */
void
fatal (string, arg)
char *string, *arg;
{
fprintf (stderr, "ld: ");
fprintf (stderr, string, arg);
fprintf (stderr, "\n");
exit (1);
}
/* Report a fatal error. The error message is STRING
followed by the filename of ENTRY. */
void
fatal_with_file (string, entry)
char *string;
struct file_entry *entry;
{
fprintf (stderr, "ld: ");
fprintf (stderr, string);
print_file_name (entry, stderr);
fprintf (stderr, "\n");
exit (1);
}
/* Report a fatal error using the message for the last failed system call,
followed by the string NAME. */
void
perror_name (name)
char *name;
{
extern int errno, sys_nerr;
extern char *sys_errlist[];
char *s;
if (errno < sys_nerr)
s = concat ("", sys_errlist[errno], " for %s");
else
s = "cannot open %s";
fatal (s, name);
}
/* Report a fatal error using the message for the last failed system call,
followed by the name of file ENTRY. */
void
perror_file (entry)
struct file_entry *entry;
{
extern int errno, sys_nerr;
extern char *sys_errlist[];
char *s;
if (errno < sys_nerr)
s = concat ("", sys_errlist[errno], " for ");
else
s = "cannot open ";
fatal_with_file (s, entry);
}
/* Report a nonfatal error.
STRING is a format for printf, and ARG1 ... ARG3 are args for it. */
void
error (string, arg1, arg2, arg3)
char *string, *arg1, *arg2, *arg3;
{
fprintf (stderr, "%s: ", progname);
fprintf (stderr, string, arg1, arg2, arg3);
fprintf (stderr, "\n");
}
/* Output COUNT*ELTSIZE bytes of data at BUF
to the descriptor DESC. */
void
mywrite (buf, count, eltsize, desc)
char *buf;
int count;
int eltsize;
int desc;
{
register int val;
register int bytes = count * eltsize;
while (bytes > 0)
{
val = write (desc, buf, bytes);
if (val <= 0)
perror_name (output_filename);
buf += val;
bytes -= val;
}
}
/* Output PADDING zero-bytes to descriptor OUTDESC.
PADDING may be negative; in that case, do nothing. */
void
padfile (padding, outdesc)
int padding;
int outdesc;
{
register char *buf;
if (padding <= 0)
return;
buf = (char *) alloca (padding);
bzero (buf, padding);
mywrite (buf, padding, 1, outdesc);
}
/* Return a newly-allocated string
whose contents concatenate the strings S1, S2, S3. */
char *
concat (s1, s2, s3)
char *s1, *s2, *s3;
{
register int len1 = strlen (s1), len2 = strlen (s2), len3 = strlen (s3);
register char *result = (char *) xmalloc (len1 + len2 + len3 + 1);
strcpy (result, s1);
strcpy (result + len1, s2);
strcpy (result + len1 + len2, s3);
result[len1 + len2 + len3] = 0;
return result;
}
/* Parse the string ARG using scanf format FORMAT, and return the result.
If it does not parse, report fatal error
generating the error message using format string ERROR and ARG as arg. */
int
parse (arg, format, error)
char *arg, *format;
{
int x;
if (1 != sscanf (arg, format, &x))
fatal (error, arg);
return x;
}
/* Like malloc but get fatal error if memory is exhausted. */
int
xmalloc (size)
int size;
{
register int result = malloc (size);
if (!result)
fatal ("virtual memory exhausted", 0);
return result;
}
/* Like realloc but get fatal error if memory is exhausted. */
int
xrealloc (ptr, size)
char *ptr;
int size;
{
register int result = realloc (ptr, size);
if (!result)
fatal ("virtual memory exhausted", 0);
return result;
}
#ifdef USG
void
bzero (p, n)
char *p;
{
memset (p, 0, n);
}
void
bcopy (from, to, n)
char *from, *to;
{
memcpy (to, from, n);
}
getpagesize ()
{
return (4096);
}
#endif
#if defined(sun) && (TARGET == SUN4)
/* Don't use local pagesize to build for Sparc. */
getpagesize ()
{
return (8192);
}
#endif
|