aboutsummaryrefslogtreecommitdiff
path: root/bfd/reloc.c
blob: 68fe4592f7609f7a2688fe5ef4fe05b409c4b898 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
/* BFD support for handling relocation entries.
   Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 1997, 1998
   Free Software Foundation, Inc.
   Written by Cygnus Support.

This file is part of BFD, the Binary File Descriptor library.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/*
SECTION
	Relocations

	BFD maintains relocations in much the same way it maintains
	symbols: they are left alone until required, then read in
	en-mass and translated into an internal form.  A common
	routine <<bfd_perform_relocation>> acts upon the
	canonical form to do the fixup.

	Relocations are maintained on a per section basis,
	while symbols are maintained on a per BFD basis.

	All that a back end has to do to fit the BFD interface is to create
	a <<struct reloc_cache_entry>> for each relocation
	in a particular section, and fill in the right bits of the structures.

@menu
@* typedef arelent::
@* howto manager::
@end menu

*/

/* DO compile in the reloc_code name table from libbfd.h.  */
#define _BFD_MAKE_TABLE_bfd_reloc_code_real

#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "libbfd.h"
/*
DOCDD
INODE
	typedef arelent, howto manager, Relocations, Relocations

SUBSECTION
	typedef arelent

	This is the structure of a relocation entry:

CODE_FRAGMENT
.
.typedef enum bfd_reloc_status
.{
.       {* No errors detected *}
.  bfd_reloc_ok,
.
.       {* The relocation was performed, but there was an overflow. *}
.  bfd_reloc_overflow,
.
.       {* The address to relocate was not within the section supplied. *}
.  bfd_reloc_outofrange,
.
.       {* Used by special functions *}
.  bfd_reloc_continue,
.
.       {* Unsupported relocation size requested. *}
.  bfd_reloc_notsupported,
.
.       {* Unused *}
.  bfd_reloc_other,
.
.       {* The symbol to relocate against was undefined. *}
.  bfd_reloc_undefined,
.
.       {* The relocation was performed, but may not be ok - presently
.          generated only when linking i960 coff files with i960 b.out
.          symbols.  If this type is returned, the error_message argument
.          to bfd_perform_relocation will be set.  *}
.  bfd_reloc_dangerous
. }
. bfd_reloc_status_type;
.
.
.typedef struct reloc_cache_entry
.{
.       {* A pointer into the canonical table of pointers  *}
.  struct symbol_cache_entry **sym_ptr_ptr;
.
.       {* offset in section *}
.  bfd_size_type address;
.
.       {* addend for relocation value *}
.  bfd_vma addend;
.
.       {* Pointer to how to perform the required relocation *}
.  reloc_howto_type *howto;
.
.} arelent;

*/

/*
DESCRIPTION

        Here is a description of each of the fields within an <<arelent>>:

        o <<sym_ptr_ptr>>

        The symbol table pointer points to a pointer to the symbol
        associated with the relocation request.  It is
        the pointer into the table returned by the back end's
        <<get_symtab>> action. @xref{Symbols}. The symbol is referenced
        through a pointer to a pointer so that tools like the linker
        can fix up all the symbols of the same name by modifying only
        one pointer. The relocation routine looks in the symbol and
        uses the base of the section the symbol is attached to and the
        value of the symbol as the initial relocation offset. If the
        symbol pointer is zero, then the section provided is looked up.

        o <<address>>

        The <<address>> field gives the offset in bytes from the base of
        the section data which owns the relocation record to the first
        byte of relocatable information. The actual data relocated
        will be relative to this point; for example, a relocation
        type which modifies the bottom two bytes of a four byte word
        would not touch the first byte pointed to in a big endian
        world.

	o <<addend>>

	The <<addend>> is a value provided by the back end to be added (!)
	to the relocation offset. Its interpretation is dependent upon
	the howto. For example, on the 68k the code:


|        char foo[];
|        main()
|                {
|                return foo[0x12345678];
|                }

        Could be compiled into:

|        linkw fp,#-4
|        moveb @@#12345678,d0
|        extbl d0
|        unlk fp
|        rts


        This could create a reloc pointing to <<foo>>, but leave the
        offset in the data, something like:


|RELOCATION RECORDS FOR [.text]:
|offset   type      value
|00000006 32        _foo
|
|00000000 4e56 fffc          ; linkw fp,#-4
|00000004 1039 1234 5678     ; moveb @@#12345678,d0
|0000000a 49c0               ; extbl d0
|0000000c 4e5e               ; unlk fp
|0000000e 4e75               ; rts


        Using coff and an 88k, some instructions don't have enough
        space in them to represent the full address range, and
        pointers have to be loaded in two parts. So you'd get something like:


|        or.u     r13,r0,hi16(_foo+0x12345678)
|        ld.b     r2,r13,lo16(_foo+0x12345678)
|        jmp      r1


        This should create two relocs, both pointing to <<_foo>>, and with
        0x12340000 in their addend field. The data would consist of:


|RELOCATION RECORDS FOR [.text]:
|offset   type      value
|00000002 HVRT16    _foo+0x12340000
|00000006 LVRT16    _foo+0x12340000
|
|00000000 5da05678           ; or.u r13,r0,0x5678
|00000004 1c4d5678           ; ld.b r2,r13,0x5678
|00000008 f400c001           ; jmp r1


        The relocation routine digs out the value from the data, adds
        it to the addend to get the original offset, and then adds the
        value of <<_foo>>. Note that all 32 bits have to be kept around
        somewhere, to cope with carry from bit 15 to bit 16.

        One further example is the sparc and the a.out format. The
        sparc has a similar problem to the 88k, in that some
        instructions don't have room for an entire offset, but on the
        sparc the parts are created in odd sized lumps. The designers of
        the a.out format chose to not use the data within the section
        for storing part of the offset; all the offset is kept within
        the reloc. Anything in the data should be ignored.

|        save %sp,-112,%sp
|        sethi %hi(_foo+0x12345678),%g2
|        ldsb [%g2+%lo(_foo+0x12345678)],%i0
|        ret
|        restore

        Both relocs contain a pointer to <<foo>>, and the offsets
        contain junk.


|RELOCATION RECORDS FOR [.text]:
|offset   type      value
|00000004 HI22      _foo+0x12345678
|00000008 LO10      _foo+0x12345678
|
|00000000 9de3bf90     ; save %sp,-112,%sp
|00000004 05000000     ; sethi %hi(_foo+0),%g2
|00000008 f048a000     ; ldsb [%g2+%lo(_foo+0)],%i0
|0000000c 81c7e008     ; ret
|00000010 81e80000     ; restore


        o <<howto>>

        The <<howto>> field can be imagined as a
        relocation instruction. It is a pointer to a structure which
        contains information on what to do with all of the other
        information in the reloc record and data section. A back end
        would normally have a relocation instruction set and turn
        relocations into pointers to the correct structure on input -
        but it would be possible to create each howto field on demand.

*/

/*
SUBSUBSECTION
	<<enum complain_overflow>>

	Indicates what sort of overflow checking should be done when
	performing a relocation.

CODE_FRAGMENT
.
.enum complain_overflow
.{
.	{* Do not complain on overflow. *}
.  complain_overflow_dont,
.
.	{* Complain if the bitfield overflows, whether it is considered
.	   as signed or unsigned. *}
.  complain_overflow_bitfield,
.
.	{* Complain if the value overflows when considered as signed
.	   number. *}
.  complain_overflow_signed,
.
.	{* Complain if the value overflows when considered as an
.	   unsigned number. *}
.  complain_overflow_unsigned
.};

*/

/*
SUBSUBSECTION
        <<reloc_howto_type>>

        The <<reloc_howto_type>> is a structure which contains all the
        information that libbfd needs to know to tie up a back end's data.

CODE_FRAGMENT
.struct symbol_cache_entry;		{* Forward declaration *}
.
.struct reloc_howto_struct
.{
.       {*  The type field has mainly a documentary use - the back end can
.           do what it wants with it, though normally the back end's
.           external idea of what a reloc number is stored
.           in this field. For example, a PC relative word relocation
.           in a coff environment has the type 023 - because that's
.           what the outside world calls a R_PCRWORD reloc. *}
.  unsigned int type;
.
.       {*  The value the final relocation is shifted right by. This drops
.           unwanted data from the relocation.  *}
.  unsigned int rightshift;
.
.	{*  The size of the item to be relocated.  This is *not* a
.	    power-of-two measure.  To get the number of bytes operated
.	    on by a type of relocation, use bfd_get_reloc_size.  *}
.  int size;
.
.       {*  The number of bits in the item to be relocated.  This is used
.	    when doing overflow checking.  *}
.  unsigned int bitsize;
.
.       {*  Notes that the relocation is relative to the location in the
.           data section of the addend. The relocation function will
.           subtract from the relocation value the address of the location
.           being relocated. *}
.  boolean pc_relative;
.
.	{*  The bit position of the reloc value in the destination.
.	    The relocated value is left shifted by this amount. *}
.  unsigned int bitpos;
.
.	{* What type of overflow error should be checked for when
.	   relocating. *}
.  enum complain_overflow complain_on_overflow;
.
.       {* If this field is non null, then the supplied function is
.          called rather than the normal function. This allows really
.          strange relocation methods to be accomodated (e.g., i960 callj
.          instructions). *}
.  bfd_reloc_status_type (*special_function)
.				    PARAMS ((bfd *abfd,
.					     arelent *reloc_entry,
.                                            struct symbol_cache_entry *symbol,
.                                            PTR data,
.                                            asection *input_section,
.                                            bfd *output_bfd,
.                                            char **error_message));
.
.       {* The textual name of the relocation type. *}
.  char *name;
.
.       {* When performing a partial link, some formats must modify the
.          relocations rather than the data - this flag signals this.*}
.  boolean partial_inplace;
.
.       {* The src_mask selects which parts of the read in data
.          are to be used in the relocation sum.  E.g., if this was an 8 bit
.          bit of data which we read and relocated, this would be
.          0x000000ff. When we have relocs which have an addend, such as
.          sun4 extended relocs, the value in the offset part of a
.          relocating field is garbage so we never use it. In this case
.          the mask would be 0x00000000. *}
.  bfd_vma src_mask;
.
.       {* The dst_mask selects which parts of the instruction are replaced
.          into the instruction. In most cases src_mask == dst_mask,
.          except in the above special case, where dst_mask would be
.          0x000000ff, and src_mask would be 0x00000000.   *}
.  bfd_vma dst_mask;
.
.       {* When some formats create PC relative instructions, they leave
.          the value of the pc of the place being relocated in the offset
.          slot of the instruction, so that a PC relative relocation can
.          be made just by adding in an ordinary offset (e.g., sun3 a.out).
.          Some formats leave the displacement part of an instruction
.          empty (e.g., m88k bcs); this flag signals the fact.*}
.  boolean pcrel_offset;
.
.};

*/

/*
FUNCTION
	The HOWTO Macro

DESCRIPTION
	The HOWTO define is horrible and will go away.


.#define HOWTO(C, R,S,B, P, BI, O, SF, NAME, INPLACE, MASKSRC, MASKDST, PC) \
.  {(unsigned)C,R,S,B, P, BI, O,SF,NAME,INPLACE,MASKSRC,MASKDST,PC}

DESCRIPTION
	And will be replaced with the totally magic way. But for the
	moment, we are compatible, so do it this way.


.#define NEWHOWTO( FUNCTION, NAME,SIZE,REL,IN) HOWTO(0,0,SIZE,0,REL,0,complain_overflow_dont,FUNCTION, NAME,false,0,0,IN)
.
DESCRIPTION
	Helper routine to turn a symbol into a relocation value.

.#define HOWTO_PREPARE(relocation, symbol)      \
.  {                                            \
.  if (symbol != (asymbol *)NULL) {             \
.    if (bfd_is_com_section (symbol->section)) { \
.      relocation = 0;                          \
.    }                                          \
.    else {                                     \
.      relocation = symbol->value;              \
.    }                                          \
.  }                                            \
.}

*/

/*
FUNCTION
	bfd_get_reloc_size

SYNOPSIS
	int bfd_get_reloc_size (reloc_howto_type *);

DESCRIPTION
	For a reloc_howto_type that operates on a fixed number of bytes,
	this returns the number of bytes operated on.
 */

int
bfd_get_reloc_size (howto)
     reloc_howto_type *howto;
{
  switch (howto->size)
    {
    case 0: return 1;
    case 1: return 2;
    case 2: return 4;
    case 3: return 0;
    case 4: return 8;
    case 8: return 16;
    case -2: return 4;
    default: abort ();
    }
}

/*
TYPEDEF
	arelent_chain

DESCRIPTION

	How relocs are tied together in an <<asection>>:

.typedef struct relent_chain {
.  arelent relent;
.  struct   relent_chain *next;
.} arelent_chain;

*/


/*
FUNCTION
	bfd_check_overflow

SYNOPSIS
	bfd_reloc_status_type
		bfd_check_overflow
			(enum complain_overflow how,
			 unsigned int bitsize,
			 unsigned int rightshift,
			 bfd_vma relocation);

DESCRIPTION
	Perform overflow checking on @var{relocation} which has @var{bitsize}
	significant bits and will be shifted right by @var{rightshift} bits.
	The result is either of @code{bfd_reloc_ok} or
	@code{bfd_reloc_overflow}.

*/

bfd_reloc_status_type
bfd_check_overflow (how, bitsize, rightshift, relocation)
     enum complain_overflow how;
     unsigned int bitsize, rightshift;
     bfd_vma relocation;
{
  bfd_vma check;
  bfd_reloc_status_type flag = bfd_reloc_ok;

  /* Get the value that will be used for the relocation, but
     starting at bit position zero.  */
  check = relocation >> rightshift;

  switch (how)
    {
    case complain_overflow_dont:
      break;

    case complain_overflow_signed:
      {
	/* Assumes two's complement.  */
	bfd_signed_vma reloc_signed_max = (1 << (bitsize - 1)) - 1;
	bfd_signed_vma reloc_signed_min = ~reloc_signed_max;

	/* The above right shift is incorrect for a signed value.
	   Fix it up by forcing on the upper bits.  */
	if (rightshift > 0
	    && (bfd_signed_vma) relocation < 0)
	  check |= ((bfd_vma) - 1
		    & ~((bfd_vma) - 1
			>> rightshift));
	if ((bfd_signed_vma) check > reloc_signed_max
	    || (bfd_signed_vma) check < reloc_signed_min)
	  flag = bfd_reloc_overflow;
      }
      break;

    case complain_overflow_unsigned:
      {
	/* Assumes two's complement.  This expression avoids
	   overflow if `bitsize' is the number of bits in
	   bfd_vma.  */
	bfd_vma reloc_unsigned_max = (((1 << (bitsize - 1)) - 1) << 1) | 1;

	if ((bfd_vma) check > reloc_unsigned_max)
	  flag = bfd_reloc_overflow;
      }
      break;

    case complain_overflow_bitfield:
      {
	/* Assumes two's complement.  This expression avoids
	   overflow if `bitsize' is the number of bits in
	   bfd_vma.  */
	bfd_vma reloc_bits = (((1 << (bitsize - 1)) - 1) << 1) | 1;

	if (((bfd_vma) check & ~reloc_bits) != 0
	    && ((bfd_vma) check & ~reloc_bits) != (-1 & ~reloc_bits))
	  {
	    /* The above right shift is incorrect for a signed
	       value.  See if turning on the upper bits fixes the
	       overflow.  */
	    if (rightshift > 0
		&& (bfd_signed_vma) relocation < 0)
	      {
		check |= ((bfd_vma) - 1
			  & ~((bfd_vma) - 1
			      >> rightshift));
		if (((bfd_vma) check & ~reloc_bits) != (-1 & ~reloc_bits))
		  flag = bfd_reloc_overflow;
	      }
	    else
	      flag = bfd_reloc_overflow;
	  }
      }
      break;

    default:
      abort ();
    }

  return flag;
}


/*
FUNCTION
	bfd_perform_relocation

SYNOPSIS
	bfd_reloc_status_type
                bfd_perform_relocation
                        (bfd *abfd,
                         arelent *reloc_entry,
                         PTR data,
                         asection *input_section,
                         bfd *output_bfd,
			 char **error_message);

DESCRIPTION
	If @var{output_bfd} is supplied to this function, the
	generated image will be relocatable; the relocations are
	copied to the output file after they have been changed to
	reflect the new state of the world. There are two ways of
	reflecting the results of partial linkage in an output file:
	by modifying the output data in place, and by modifying the
	relocation record.  Some native formats (e.g., basic a.out and
	basic coff) have no way of specifying an addend in the
	relocation type, so the addend has to go in the output data.
	This is no big deal since in these formats the output data
	slot will always be big enough for the addend. Complex reloc
	types with addends were invented to solve just this problem.
	The @var{error_message} argument is set to an error message if
	this return @code{bfd_reloc_dangerous}.

*/


bfd_reloc_status_type
bfd_perform_relocation (abfd, reloc_entry, data, input_section, output_bfd,
			error_message)
     bfd *abfd;
     arelent *reloc_entry;
     PTR data;
     asection *input_section;
     bfd *output_bfd;
     char **error_message;
{
  bfd_vma relocation;
  bfd_reloc_status_type flag = bfd_reloc_ok;
  bfd_size_type addr = reloc_entry->address;
  bfd_vma output_base = 0;
  reloc_howto_type *howto = reloc_entry->howto;
  asection *reloc_target_output_section;
  asymbol *symbol;

  symbol = *(reloc_entry->sym_ptr_ptr);
  if (bfd_is_abs_section (symbol->section)
      && output_bfd != (bfd *) NULL)
    {
      reloc_entry->address += input_section->output_offset;
      return bfd_reloc_ok;
    }

  /* If we are not producing relocateable output, return an error if
     the symbol is not defined.  An undefined weak symbol is
     considered to have a value of zero (SVR4 ABI, p. 4-27).  */
  if (bfd_is_und_section (symbol->section)
      && (symbol->flags & BSF_WEAK) == 0
      && output_bfd == (bfd *) NULL)
    flag = bfd_reloc_undefined;

  /* If there is a function supplied to handle this relocation type,
     call it.  It'll return `bfd_reloc_continue' if further processing
     can be done.  */
  if (howto->special_function)
    {
      bfd_reloc_status_type cont;
      cont = howto->special_function (abfd, reloc_entry, symbol, data,
				      input_section, output_bfd,
				      error_message);
      if (cont != bfd_reloc_continue)
	return cont;
    }

  /* Is the address of the relocation really within the section?  */
  if (reloc_entry->address > input_section->_cooked_size)
    return bfd_reloc_outofrange;

  /* Work out which section the relocation is targetted at and the
     initial relocation command value.  */

  /* Get symbol value.  (Common symbols are special.)  */
  if (bfd_is_com_section (symbol->section))
    relocation = 0;
  else
    relocation = symbol->value;


  reloc_target_output_section = symbol->section->output_section;

  /* Convert input-section-relative symbol value to absolute.  */
  if (output_bfd && howto->partial_inplace == false)
    output_base = 0;
  else
    output_base = reloc_target_output_section->vma;

  relocation += output_base + symbol->section->output_offset;

  /* Add in supplied addend.  */
  relocation += reloc_entry->addend;

  /* Here the variable relocation holds the final address of the
     symbol we are relocating against, plus any addend.  */

  if (howto->pc_relative == true)
    {
      /* This is a PC relative relocation.  We want to set RELOCATION
	 to the distance between the address of the symbol and the
	 location.  RELOCATION is already the address of the symbol.

	 We start by subtracting the address of the section containing
	 the location.

	 If pcrel_offset is set, we must further subtract the position
	 of the location within the section.  Some targets arrange for
	 the addend to be the negative of the position of the location
	 within the section; for example, i386-aout does this.  For
	 i386-aout, pcrel_offset is false.  Some other targets do not
	 include the position of the location; for example, m88kbcs,
	 or ELF.  For those targets, pcrel_offset is true.

	 If we are producing relocateable output, then we must ensure
	 that this reloc will be correctly computed when the final
	 relocation is done.  If pcrel_offset is false we want to wind
	 up with the negative of the location within the section,
	 which means we must adjust the existing addend by the change
	 in the location within the section.  If pcrel_offset is true
	 we do not want to adjust the existing addend at all.

	 FIXME: This seems logical to me, but for the case of
	 producing relocateable output it is not what the code
	 actually does.  I don't want to change it, because it seems
	 far too likely that something will break.  */

      relocation -=
	input_section->output_section->vma + input_section->output_offset;

      if (howto->pcrel_offset == true)
	relocation -= reloc_entry->address;
    }

  if (output_bfd != (bfd *) NULL)
    {
      if (howto->partial_inplace == false)
	{
	  /* This is a partial relocation, and we want to apply the relocation
	     to the reloc entry rather than the raw data. Modify the reloc
	     inplace to reflect what we now know.  */
	  reloc_entry->addend = relocation;
	  reloc_entry->address += input_section->output_offset;
	  return flag;
	}
      else
	{
	  /* This is a partial relocation, but inplace, so modify the
	     reloc record a bit.

	     If we've relocated with a symbol with a section, change
	     into a ref to the section belonging to the symbol.  */

	  reloc_entry->address += input_section->output_offset;

	  /* WTF?? */
	  if (abfd->xvec->flavour == bfd_target_coff_flavour
	      && strcmp (abfd->xvec->name, "aixcoff-rs6000") != 0
	      && strcmp (abfd->xvec->name, "xcoff-powermac") != 0
	      && strcmp (abfd->xvec->name, "coff-Intel-little") != 0
	      && strcmp (abfd->xvec->name, "coff-Intel-big") != 0)
	    {
#if 1
	      /* For m68k-coff, the addend was being subtracted twice during
		 relocation with -r.  Removing the line below this comment
		 fixes that problem; see PR 2953.

However, Ian wrote the following, regarding removing the line below,
which explains why it is still enabled:  --djm

If you put a patch like that into BFD you need to check all the COFF
linkers.  I am fairly certain that patch will break coff-i386 (e.g.,
SCO); see coff_i386_reloc in coff-i386.c where I worked around the
problem in a different way.  There may very well be a reason that the
code works as it does.

Hmmm.  The first obvious point is that bfd_perform_relocation should
not have any tests that depend upon the flavour.  It's seem like
entirely the wrong place for such a thing.  The second obvious point
is that the current code ignores the reloc addend when producing
relocateable output for COFF.  That's peculiar.  In fact, I really
have no idea what the point of the line you want to remove is.

A typical COFF reloc subtracts the old value of the symbol and adds in
the new value to the location in the object file (if it's a pc
relative reloc it adds the difference between the symbol value and the
location).  When relocating we need to preserve that property.

BFD handles this by setting the addend to the negative of the old
value of the symbol.  Unfortunately it handles common symbols in a
non-standard way (it doesn't subtract the old value) but that's a
different story (we can't change it without losing backward
compatibility with old object files) (coff-i386 does subtract the old
value, to be compatible with existing coff-i386 targets, like SCO).

So everything works fine when not producing relocateable output.  When
we are producing relocateable output, logically we should do exactly
what we do when not producing relocateable output.  Therefore, your
patch is correct.  In fact, it should probably always just set
reloc_entry->addend to 0 for all cases, since it is, in fact, going to
add the value into the object file.  This won't hurt the COFF code,
which doesn't use the addend; I'm not sure what it will do to other
formats (the thing to check for would be whether any formats both use
the addend and set partial_inplace).

When I wanted to make coff-i386 produce relocateable output, I ran
into the problem that you are running into: I wanted to remove that
line.  Rather than risk it, I made the coff-i386 relocs use a special
function; it's coff_i386_reloc in coff-i386.c.  The function
specifically adds the addend field into the object file, knowing that
bfd_perform_relocation is not going to.  If you remove that line, then
coff-i386.c will wind up adding the addend field in twice.  It's
trivial to fix; it just needs to be done.

The problem with removing the line is just that it may break some
working code.  With BFD it's hard to be sure of anything.  The right
way to deal with this is simply to build and test at least all the
supported COFF targets.  It should be straightforward if time and disk
space consuming.  For each target:
    1) build the linker
    2) generate some executable, and link it using -r (I would
       probably use paranoia.o and link against newlib/libc.a, which
       for all the supported targets would be available in
       /usr/cygnus/progressive/H-host/target/lib/libc.a).
    3) make the change to reloc.c
    4) rebuild the linker
    5) repeat step 2
    6) if the resulting object files are the same, you have at least
       made it no worse
    7) if they are different you have to figure out which version is
       right
*/
	      relocation -= reloc_entry->addend;
#endif
	      reloc_entry->addend = 0;
	    }
	  else
	    {
	      reloc_entry->addend = relocation;
	    }
	}
    }
  else
    {
      reloc_entry->addend = 0;
    }

  /* FIXME: This overflow checking is incomplete, because the value
     might have overflowed before we get here.  For a correct check we
     need to compute the value in a size larger than bitsize, but we
     can't reasonably do that for a reloc the same size as a host
     machine word.
     FIXME: We should also do overflow checking on the result after
     adding in the value contained in the object file.  */
  if (howto->complain_on_overflow != complain_overflow_dont
      && flag == bfd_reloc_ok)
    flag = bfd_check_overflow (howto->complain_on_overflow, howto->bitsize,
			       howto->rightshift, relocation);

  /*
    Either we are relocating all the way, or we don't want to apply
    the relocation to the reloc entry (probably because there isn't
    any room in the output format to describe addends to relocs)
    */

  /* The cast to bfd_vma avoids a bug in the Alpha OSF/1 C compiler
     (OSF version 1.3, compiler version 3.11).  It miscompiles the
     following program:

     struct str
     {
       unsigned int i0;
     } s = { 0 };

     int
     main ()
     {
       unsigned long x;

       x = 0x100000000;
       x <<= (unsigned long) s.i0;
       if (x == 0)
	 printf ("failed\n");
       else
	 printf ("succeeded (%lx)\n", x);
     }
     */

  relocation >>= (bfd_vma) howto->rightshift;

  /* Shift everything up to where it's going to be used */

  relocation <<= (bfd_vma) howto->bitpos;

  /* Wait for the day when all have the mask in them */

  /* What we do:
     i instruction to be left alone
     o offset within instruction
     r relocation offset to apply
     S src mask
     D dst mask
     N ~dst mask
     A part 1
     B part 2
     R result

     Do this:
     i i i i i o o o o o        from bfd_get<size>
     and           S S S S S    to get the size offset we want
     +   r r r r r r r r r r  to get the final value to place
     and           D D D D D  to chop to right size
     -----------------------
     A A A A A
     And this:
     ...   i i i i i o o o o o  from bfd_get<size>
     and   N N N N N            get instruction
     -----------------------
     ...   B B B B B

     And then:
     B B B B B
     or              A A A A A
     -----------------------
     R R R R R R R R R R        put into bfd_put<size>
     */

#define DOIT(x) \
  x = ( (x & ~howto->dst_mask) | (((x & howto->src_mask) +  relocation) & howto->dst_mask))

  switch (howto->size)
    {
    case 0:
      {
	char x = bfd_get_8 (abfd, (char *) data + addr);
	DOIT (x);
	bfd_put_8 (abfd, x, (unsigned char *) data + addr);
      }
      break;

    case 1:
      {
	short x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
	DOIT (x);
	bfd_put_16 (abfd, x, (unsigned char *) data + addr);
      }
      break;
    case 2:
      {
	long x = bfd_get_32 (abfd, (bfd_byte *) data + addr);
	DOIT (x);
	bfd_put_32 (abfd, x, (bfd_byte *) data + addr);
      }
      break;
    case -2:
      {
	long x = bfd_get_32 (abfd, (bfd_byte *) data + addr);
	relocation = -relocation;
	DOIT (x);
	bfd_put_32 (abfd, x, (bfd_byte *) data + addr);
      }
      break;

    case -1:
      {
	long x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
	relocation = -relocation;
	DOIT (x);
	bfd_put_16 (abfd, x, (bfd_byte *) data + addr);
      }
      break;

    case 3:
      /* Do nothing */
      break;

    case 4:
#ifdef BFD64
      {
	bfd_vma x = bfd_get_64 (abfd, (bfd_byte *) data + addr);
	DOIT (x);
	bfd_put_64 (abfd, x, (bfd_byte *) data + addr);
      }
#else
      abort ();
#endif
      break;
    default:
      return bfd_reloc_other;
    }

  return flag;
}

/*
FUNCTION
	bfd_install_relocation

SYNOPSIS
	bfd_reloc_status_type
                bfd_install_relocation
                        (bfd *abfd,
                         arelent *reloc_entry,
                         PTR data, bfd_vma data_start,
                         asection *input_section,
			 char **error_message);

DESCRIPTION
	This looks remarkably like <<bfd_perform_relocation>>, except it
	does not expect that the section contents have been filled in.
	I.e., it's suitable for use when creating, rather than applying
	a relocation.

	For now, this function should be considered reserved for the
	assembler.

*/


bfd_reloc_status_type
bfd_install_relocation (abfd, reloc_entry, data_start, data_start_offset,
			input_section, error_message)
     bfd *abfd;
     arelent *reloc_entry;
     PTR data_start;
     bfd_vma data_start_offset;
     asection *input_section;
     char **error_message;
{
  bfd_vma relocation;
  bfd_reloc_status_type flag = bfd_reloc_ok;
  bfd_size_type addr = reloc_entry->address;
  bfd_vma output_base = 0;
  reloc_howto_type *howto = reloc_entry->howto;
  asection *reloc_target_output_section;
  asymbol *symbol;
  bfd_byte *data;

  symbol = *(reloc_entry->sym_ptr_ptr);
  if (bfd_is_abs_section (symbol->section))
    {
      reloc_entry->address += input_section->output_offset;
      return bfd_reloc_ok;
    }

  /* If there is a function supplied to handle this relocation type,
     call it.  It'll return `bfd_reloc_continue' if further processing
     can be done.  */
  if (howto->special_function)
    {
      bfd_reloc_status_type cont;
  
      /* XXX - The special_function calls haven't been fixed up to deal
	 with creating new relocations and section contents.  */
      cont = howto->special_function (abfd, reloc_entry, symbol,
				      /* XXX - Non-portable! */
				      ((bfd_byte *) data_start
				       - data_start_offset),
				      input_section, abfd, error_message);
      if (cont != bfd_reloc_continue)
	return cont;
    }

  /* Is the address of the relocation really within the section?  */
  if (reloc_entry->address > input_section->_cooked_size)
    return bfd_reloc_outofrange;

  /* Work out which section the relocation is targetted at and the
     initial relocation command value.  */

  /* Get symbol value.  (Common symbols are special.)  */
  if (bfd_is_com_section (symbol->section))
    relocation = 0;
  else
    relocation = symbol->value;

  reloc_target_output_section = symbol->section->output_section;

  /* Convert input-section-relative symbol value to absolute.  */
  if (howto->partial_inplace == false)
    output_base = 0;
  else
    output_base = reloc_target_output_section->vma;

  relocation += output_base + symbol->section->output_offset;

  /* Add in supplied addend.  */
  relocation += reloc_entry->addend;

  /* Here the variable relocation holds the final address of the
     symbol we are relocating against, plus any addend.  */

  if (howto->pc_relative == true)
    {
      /* This is a PC relative relocation.  We want to set RELOCATION
	 to the distance between the address of the symbol and the
	 location.  RELOCATION is already the address of the symbol.

	 We start by subtracting the address of the section containing
	 the location.

	 If pcrel_offset is set, we must further subtract the position
	 of the location within the section.  Some targets arrange for
	 the addend to be the negative of the position of the location
	 within the section; for example, i386-aout does this.  For
	 i386-aout, pcrel_offset is false.  Some other targets do not
	 include the position of the location; for example, m88kbcs,
	 or ELF.  For those targets, pcrel_offset is true.

	 If we are producing relocateable output, then we must ensure
	 that this reloc will be correctly computed when the final
	 relocation is done.  If pcrel_offset is false we want to wind
	 up with the negative of the location within the section,
	 which means we must adjust the existing addend by the change
	 in the location within the section.  If pcrel_offset is true
	 we do not want to adjust the existing addend at all.

	 FIXME: This seems logical to me, but for the case of
	 producing relocateable output it is not what the code
	 actually does.  I don't want to change it, because it seems
	 far too likely that something will break.  */

      relocation -=
	input_section->output_section->vma + input_section->output_offset;

      if (howto->pcrel_offset == true && howto->partial_inplace == true)
	relocation -= reloc_entry->address;
    }

  if (howto->partial_inplace == false)
    {
      /* This is a partial relocation, and we want to apply the relocation
	 to the reloc entry rather than the raw data. Modify the reloc
	 inplace to reflect what we now know.  */
      reloc_entry->addend = relocation;
      reloc_entry->address += input_section->output_offset;
      return flag;
    }
  else
    {
      /* This is a partial relocation, but inplace, so modify the
	 reloc record a bit.

	 If we've relocated with a symbol with a section, change
	 into a ref to the section belonging to the symbol.  */

      reloc_entry->address += input_section->output_offset;

      /* WTF?? */
      if (abfd->xvec->flavour == bfd_target_coff_flavour
	  && strcmp (abfd->xvec->name, "aixcoff-rs6000") != 0
	  && strcmp (abfd->xvec->name, "xcoff-powermac") != 0
	  && strcmp (abfd->xvec->name, "coff-Intel-little") != 0
	  && strcmp (abfd->xvec->name, "coff-Intel-big") != 0)
	{
#if 1
/* For m68k-coff, the addend was being subtracted twice during
   relocation with -r.  Removing the line below this comment
   fixes that problem; see PR 2953.

However, Ian wrote the following, regarding removing the line below,
which explains why it is still enabled:  --djm

If you put a patch like that into BFD you need to check all the COFF
linkers.  I am fairly certain that patch will break coff-i386 (e.g.,
SCO); see coff_i386_reloc in coff-i386.c where I worked around the
problem in a different way.  There may very well be a reason that the
code works as it does.

Hmmm.  The first obvious point is that bfd_install_relocation should
not have any tests that depend upon the flavour.  It's seem like
entirely the wrong place for such a thing.  The second obvious point
is that the current code ignores the reloc addend when producing
relocateable output for COFF.  That's peculiar.  In fact, I really
have no idea what the point of the line you want to remove is.

A typical COFF reloc subtracts the old value of the symbol and adds in
the new value to the location in the object file (if it's a pc
relative reloc it adds the difference between the symbol value and the
location).  When relocating we need to preserve that property.

BFD handles this by setting the addend to the negative of the old
value of the symbol.  Unfortunately it handles common symbols in a
non-standard way (it doesn't subtract the old value) but that's a
different story (we can't change it without losing backward
compatibility with old object files) (coff-i386 does subtract the old
value, to be compatible with existing coff-i386 targets, like SCO).

So everything works fine when not producing relocateable output.  When
we are producing relocateable output, logically we should do exactly
what we do when not producing relocateable output.  Therefore, your
patch is correct.  In fact, it should probably always just set
reloc_entry->addend to 0 for all cases, since it is, in fact, going to
add the value into the object file.  This won't hurt the COFF code,
which doesn't use the addend; I'm not sure what it will do to other
formats (the thing to check for would be whether any formats both use
the addend and set partial_inplace).

When I wanted to make coff-i386 produce relocateable output, I ran
into the problem that you are running into: I wanted to remove that
line.  Rather than risk it, I made the coff-i386 relocs use a special
function; it's coff_i386_reloc in coff-i386.c.  The function
specifically adds the addend field into the object file, knowing that
bfd_install_relocation is not going to.  If you remove that line, then
coff-i386.c will wind up adding the addend field in twice.  It's
trivial to fix; it just needs to be done.

The problem with removing the line is just that it may break some
working code.  With BFD it's hard to be sure of anything.  The right
way to deal with this is simply to build and test at least all the
supported COFF targets.  It should be straightforward if time and disk
space consuming.  For each target:
    1) build the linker
    2) generate some executable, and link it using -r (I would
       probably use paranoia.o and link against newlib/libc.a, which
       for all the supported targets would be available in
       /usr/cygnus/progressive/H-host/target/lib/libc.a).
    3) make the change to reloc.c
    4) rebuild the linker
    5) repeat step 2
    6) if the resulting object files are the same, you have at least
       made it no worse
    7) if they are different you have to figure out which version is
       right
*/
	  relocation -= reloc_entry->addend;
#endif
	  reloc_entry->addend = 0;
	}
      else
	{
	  reloc_entry->addend = relocation;
	}
    }

  /* FIXME: This overflow checking is incomplete, because the value
     might have overflowed before we get here.  For a correct check we
     need to compute the value in a size larger than bitsize, but we
     can't reasonably do that for a reloc the same size as a host
     machine word.
     FIXME: We should also do overflow checking on the result after
     adding in the value contained in the object file.  */
  if (howto->complain_on_overflow != complain_overflow_dont)
    flag = bfd_check_overflow (howto->complain_on_overflow, howto->bitsize,
			       howto->rightshift, relocation);

  /*
    Either we are relocating all the way, or we don't want to apply
    the relocation to the reloc entry (probably because there isn't
    any room in the output format to describe addends to relocs)
    */

  /* The cast to bfd_vma avoids a bug in the Alpha OSF/1 C compiler
     (OSF version 1.3, compiler version 3.11).  It miscompiles the
     following program:

     struct str
     {
       unsigned int i0;
     } s = { 0 };

     int
     main ()
     {
       unsigned long x;

       x = 0x100000000;
       x <<= (unsigned long) s.i0;
       if (x == 0)
	 printf ("failed\n");
       else
	 printf ("succeeded (%lx)\n", x);
     }
     */

  relocation >>= (bfd_vma) howto->rightshift;

  /* Shift everything up to where it's going to be used */

  relocation <<= (bfd_vma) howto->bitpos;

  /* Wait for the day when all have the mask in them */

  /* What we do:
     i instruction to be left alone
     o offset within instruction
     r relocation offset to apply
     S src mask
     D dst mask
     N ~dst mask
     A part 1
     B part 2
     R result

     Do this:
     i i i i i o o o o o        from bfd_get<size>
     and           S S S S S    to get the size offset we want
     +   r r r r r r r r r r  to get the final value to place
     and           D D D D D  to chop to right size
     -----------------------
     A A A A A
     And this:
     ...   i i i i i o o o o o  from bfd_get<size>
     and   N N N N N            get instruction
     -----------------------
     ...   B B B B B

     And then:
     B B B B B
     or              A A A A A
     -----------------------
     R R R R R R R R R R        put into bfd_put<size>
     */

#define DOIT(x) \
  x = ( (x & ~howto->dst_mask) | (((x & howto->src_mask) +  relocation) & howto->dst_mask))

  data = (bfd_byte *) data_start + (addr - data_start_offset);

  switch (howto->size)
    {
    case 0:
      {
	char x = bfd_get_8 (abfd, (char *) data);
	DOIT (x);
	bfd_put_8 (abfd, x, (unsigned char *) data);
      }
      break;

    case 1:
      {
	short x = bfd_get_16 (abfd, (bfd_byte *) data);
	DOIT (x);
	bfd_put_16 (abfd, x, (unsigned char *) data);
      }
      break;
    case 2:
      {
	long x = bfd_get_32 (abfd, (bfd_byte *) data);
	DOIT (x);
	bfd_put_32 (abfd, x, (bfd_byte *) data);
      }
      break;
    case -2:
      {
	long x = bfd_get_32 (abfd, (bfd_byte *) data);
	relocation = -relocation;
	DOIT (x);
	bfd_put_32 (abfd, x, (bfd_byte *) data);
      }
      break;

    case 3:
      /* Do nothing */
      break;

    case 4:
      {
	bfd_vma x = bfd_get_64 (abfd, (bfd_byte *) data);
	DOIT (x);
	bfd_put_64 (abfd, x, (bfd_byte *) data);
      }
      break;
    default:
      return bfd_reloc_other;
    }

  return flag;
}

/* This relocation routine is used by some of the backend linkers.
   They do not construct asymbol or arelent structures, so there is no
   reason for them to use bfd_perform_relocation.  Also,
   bfd_perform_relocation is so hacked up it is easier to write a new
   function than to try to deal with it.

   This routine does a final relocation.  Whether it is useful for a
   relocateable link depends upon how the object format defines
   relocations.

   FIXME: This routine ignores any special_function in the HOWTO,
   since the existing special_function values have been written for
   bfd_perform_relocation.

   HOWTO is the reloc howto information.
   INPUT_BFD is the BFD which the reloc applies to.
   INPUT_SECTION is the section which the reloc applies to.
   CONTENTS is the contents of the section.
   ADDRESS is the address of the reloc within INPUT_SECTION.
   VALUE is the value of the symbol the reloc refers to.
   ADDEND is the addend of the reloc.  */

bfd_reloc_status_type
_bfd_final_link_relocate (howto, input_bfd, input_section, contents, address,
			  value, addend)
     reloc_howto_type *howto;
     bfd *input_bfd;
     asection *input_section;
     bfd_byte *contents;
     bfd_vma address;
     bfd_vma value;
     bfd_vma addend;
{
  bfd_vma relocation;

  /* Sanity check the address.  */
  if (address > input_section->_raw_size)
    return bfd_reloc_outofrange;

  /* This function assumes that we are dealing with a basic relocation
     against a symbol.  We want to compute the value of the symbol to
     relocate to.  This is just VALUE, the value of the symbol, plus
     ADDEND, any addend associated with the reloc.  */
  relocation = value + addend;

  /* If the relocation is PC relative, we want to set RELOCATION to
     the distance between the symbol (currently in RELOCATION) and the
     location we are relocating.  Some targets (e.g., i386-aout)
     arrange for the contents of the section to be the negative of the
     offset of the location within the section; for such targets
     pcrel_offset is false.  Other targets (e.g., m88kbcs or ELF)
     simply leave the contents of the section as zero; for such
     targets pcrel_offset is true.  If pcrel_offset is false we do not
     need to subtract out the offset of the location within the
     section (which is just ADDRESS).  */
  if (howto->pc_relative)
    {
      relocation -= (input_section->output_section->vma
		     + input_section->output_offset);
      if (howto->pcrel_offset)
	relocation -= address;
    }

  return _bfd_relocate_contents (howto, input_bfd, relocation,
				 contents + address);
}

/* Relocate a given location using a given value and howto.  */

bfd_reloc_status_type
_bfd_relocate_contents (howto, input_bfd, relocation, location)
     reloc_howto_type *howto;
     bfd *input_bfd;
     bfd_vma relocation;
     bfd_byte *location;
{
  int size;
  bfd_vma x;
  boolean overflow;

  /* If the size is negative, negate RELOCATION.  This isn't very
     general.  */
  if (howto->size < 0)
    relocation = -relocation;

  /* Get the value we are going to relocate.  */
  size = bfd_get_reloc_size (howto);
  switch (size)
    {
    default:
    case 0:
      abort ();
    case 1:
      x = bfd_get_8 (input_bfd, location);
      break;
    case 2:
      x = bfd_get_16 (input_bfd, location);
      break;
    case 4:
      x = bfd_get_32 (input_bfd, location);
      break;
    case 8:
#ifdef BFD64
      x = bfd_get_64 (input_bfd, location);
#else
      abort ();
#endif
      break;
    }

  /* Check for overflow.  FIXME: We may drop bits during the addition
     which we don't check for.  We must either check at every single
     operation, which would be tedious, or we must do the computations
     in a type larger than bfd_vma, which would be inefficient.  */
  overflow = false;
  if (howto->complain_on_overflow != complain_overflow_dont)
    {
      bfd_vma check;
      bfd_signed_vma signed_check;
      bfd_vma add;
      bfd_signed_vma signed_add;

      if (howto->rightshift == 0)
	{
	  check = relocation;
	  signed_check = (bfd_signed_vma) relocation;
	}
      else
	{
	  /* Drop unwanted bits from the value we are relocating to.  */
	  check = relocation >> howto->rightshift;

	  /* If this is a signed value, the rightshift just dropped
	     leading 1 bits (assuming twos complement).  */
	  if ((bfd_signed_vma) relocation >= 0)
	    signed_check = check;
	  else
	    signed_check = (check
			    | ((bfd_vma) - 1
			       & ~((bfd_vma) - 1 >> howto->rightshift)));
	}

      /* Get the value from the object file.  */
      add = x & howto->src_mask;

      /* Get the value from the object file with an appropriate sign.
	 The expression involving howto->src_mask isolates the upper
	 bit of src_mask.  If that bit is set in the value we are
	 adding, it is negative, and we subtract out that number times
	 two.  If src_mask includes the highest possible bit, then we
	 can not get the upper bit, but that does not matter since
	 signed_add needs no adjustment to become negative in that
	 case.  */
      signed_add = add;
      if ((add & (((~howto->src_mask) >> 1) & howto->src_mask)) != 0)
	signed_add -= (((~howto->src_mask) >> 1) & howto->src_mask) << 1;

      /* Add the value from the object file, shifted so that it is a
	 straight number.  */
      if (howto->bitpos == 0)
	{
	  check += add;
	  signed_check += signed_add;
	}
      else
	{
	  check += add >> howto->bitpos;

	  /* For the signed case we use ADD, rather than SIGNED_ADD,
	     to avoid warnings from SVR4 cc.  This is OK since we
	     explictly handle the sign bits.  */
	  if (signed_add >= 0)
	    signed_check += add >> howto->bitpos;
	  else
	    signed_check += ((add >> howto->bitpos)
			     | ((bfd_vma) - 1
				& ~((bfd_vma) - 1 >> howto->bitpos)));
	}

      switch (howto->complain_on_overflow)
	{
	case complain_overflow_signed:
	  {
	    /* Assumes two's complement.  */
	    bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
	    bfd_signed_vma reloc_signed_min = ~reloc_signed_max;

	    if (signed_check > reloc_signed_max
		|| signed_check < reloc_signed_min)
	      overflow = true;
	  }
	  break;
	case complain_overflow_unsigned:
	  {
	    /* Assumes two's complement.  This expression avoids
	       overflow if howto->bitsize is the number of bits in
	       bfd_vma.  */
	    bfd_vma reloc_unsigned_max =
	    (((1 << (howto->bitsize - 1)) - 1) << 1) | 1;

	    if (check > reloc_unsigned_max)
	      overflow = true;
	  }
	  break;
	case complain_overflow_bitfield:
	  {
	    /* Assumes two's complement.  This expression avoids
	       overflow if howto->bitsize is the number of bits in
	       bfd_vma.  */
	    bfd_vma reloc_bits = (((1 << (howto->bitsize - 1)) - 1) << 1) | 1;

	    if ((check & ~reloc_bits) != 0
		&& (((bfd_vma) signed_check & ~reloc_bits)
		    != (-1 & ~reloc_bits)))
	      overflow = true;
	  }
	  break;
	default:
	  abort ();
	}
    }

  /* Put RELOCATION in the right bits.  */
  relocation >>= (bfd_vma) howto->rightshift;
  relocation <<= (bfd_vma) howto->bitpos;

  /* Add RELOCATION to the right bits of X.  */
  x = ((x & ~howto->dst_mask)
       | (((x & howto->src_mask) + relocation) & howto->dst_mask));

  /* Put the relocated value back in the object file.  */
  switch (size)
    {
    default:
    case 0:
      abort ();
    case 1:
      bfd_put_8 (input_bfd, x, location);
      break;
    case 2:
      bfd_put_16 (input_bfd, x, location);
      break;
    case 4:
      bfd_put_32 (input_bfd, x, location);
      break;
    case 8:
#ifdef BFD64
      bfd_put_64 (input_bfd, x, location);
#else
      abort ();
#endif
      break;
    }

  return overflow ? bfd_reloc_overflow : bfd_reloc_ok;
}

/*
DOCDD
INODE
	howto manager,  , typedef arelent, Relocations

SECTION
	The howto manager

	When an application wants to create a relocation, but doesn't
	know what the target machine might call it, it can find out by
	using this bit of code.

*/

/*
TYPEDEF
	bfd_reloc_code_type

DESCRIPTION
	The insides of a reloc code.  The idea is that, eventually, there
	will be one enumerator for every type of relocation we ever do.
	Pass one of these values to <<bfd_reloc_type_lookup>>, and it'll
	return a howto pointer.

	This does mean that the application must determine the correct
	enumerator value; you can't get a howto pointer from a random set
	of attributes.

SENUM
   bfd_reloc_code_real

ENUM
  BFD_RELOC_64
ENUMX
  BFD_RELOC_32
ENUMX
  BFD_RELOC_26
ENUMX
  BFD_RELOC_24
ENUMX
  BFD_RELOC_16
ENUMX
  BFD_RELOC_14
ENUMX
  BFD_RELOC_8
ENUMDOC
  Basic absolute relocations of N bits.

ENUM
  BFD_RELOC_64_PCREL
ENUMX
  BFD_RELOC_32_PCREL
ENUMX
  BFD_RELOC_24_PCREL
ENUMX
  BFD_RELOC_16_PCREL
ENUMX
  BFD_RELOC_12_PCREL
ENUMX
  BFD_RELOC_8_PCREL
ENUMDOC
  PC-relative relocations.  Sometimes these are relative to the address
of the relocation itself; sometimes they are relative to the start of
the section containing the relocation.  It depends on the specific target.

The 24-bit relocation is used in some Intel 960 configurations.

ENUM
  BFD_RELOC_32_GOT_PCREL
ENUMX
  BFD_RELOC_16_GOT_PCREL
ENUMX
  BFD_RELOC_8_GOT_PCREL
ENUMX
  BFD_RELOC_32_GOTOFF
ENUMX
  BFD_RELOC_16_GOTOFF
ENUMX
  BFD_RELOC_LO16_GOTOFF
ENUMX
  BFD_RELOC_HI16_GOTOFF
ENUMX
  BFD_RELOC_HI16_S_GOTOFF
ENUMX
  BFD_RELOC_8_GOTOFF
ENUMX
  BFD_RELOC_32_PLT_PCREL
ENUMX
  BFD_RELOC_24_PLT_PCREL
ENUMX
  BFD_RELOC_16_PLT_PCREL
ENUMX
  BFD_RELOC_8_PLT_PCREL
ENUMX
  BFD_RELOC_32_PLTOFF
ENUMX
  BFD_RELOC_16_PLTOFF
ENUMX
  BFD_RELOC_LO16_PLTOFF
ENUMX
  BFD_RELOC_HI16_PLTOFF
ENUMX
  BFD_RELOC_HI16_S_PLTOFF
ENUMX
  BFD_RELOC_8_PLTOFF
ENUMDOC
  For ELF.

ENUM
  BFD_RELOC_68K_GLOB_DAT
ENUMX
  BFD_RELOC_68K_JMP_SLOT
ENUMX
  BFD_RELOC_68K_RELATIVE
ENUMDOC
  Relocations used by 68K ELF.

ENUM
  BFD_RELOC_32_BASEREL
ENUMX
  BFD_RELOC_16_BASEREL
ENUMX
  BFD_RELOC_LO16_BASEREL
ENUMX
  BFD_RELOC_HI16_BASEREL
ENUMX
  BFD_RELOC_HI16_S_BASEREL
ENUMX
  BFD_RELOC_8_BASEREL
ENUMX
  BFD_RELOC_RVA
ENUMDOC
  Linkage-table relative.

ENUM
  BFD_RELOC_8_FFnn
ENUMDOC
  Absolute 8-bit relocation, but used to form an address like 0xFFnn.

ENUM
  BFD_RELOC_32_PCREL_S2
ENUMX
  BFD_RELOC_16_PCREL_S2
ENUMX
  BFD_RELOC_23_PCREL_S2
ENUMDOC
  These PC-relative relocations are stored as word displacements --
i.e., byte displacements shifted right two bits.  The 30-bit word
displacement (<<32_PCREL_S2>> -- 32 bits, shifted 2) is used on the
SPARC.  (SPARC tools generally refer to this as <<WDISP30>>.)  The
signed 16-bit displacement is used on the MIPS, and the 23-bit
displacement is used on the Alpha.

ENUM
  BFD_RELOC_HI22
ENUMX
  BFD_RELOC_LO10
ENUMDOC
  High 22 bits and low 10 bits of 32-bit value, placed into lower bits of
the target word.  These are used on the SPARC.

ENUM
  BFD_RELOC_GPREL16
ENUMX
  BFD_RELOC_GPREL32
ENUMDOC
  For systems that allocate a Global Pointer register, these are
displacements off that register.  These relocation types are
handled specially, because the value the register will have is
decided relatively late.


ENUM
  BFD_RELOC_I960_CALLJ
ENUMDOC
  Reloc types used for i960/b.out.

ENUM
  BFD_RELOC_NONE
ENUMX
  BFD_RELOC_SPARC_WDISP22
ENUMX
  BFD_RELOC_SPARC22
ENUMX
  BFD_RELOC_SPARC13
ENUMX
  BFD_RELOC_SPARC_GOT10
ENUMX
  BFD_RELOC_SPARC_GOT13
ENUMX
  BFD_RELOC_SPARC_GOT22
ENUMX
  BFD_RELOC_SPARC_PC10
ENUMX
  BFD_RELOC_SPARC_PC22
ENUMX
  BFD_RELOC_SPARC_WPLT30
ENUMX
  BFD_RELOC_SPARC_COPY
ENUMX
  BFD_RELOC_SPARC_GLOB_DAT
ENUMX
  BFD_RELOC_SPARC_JMP_SLOT
ENUMX
  BFD_RELOC_SPARC_RELATIVE
ENUMX
  BFD_RELOC_SPARC_UA32
ENUMDOC
  SPARC ELF relocations.  There is probably some overlap with other
  relocation types already defined.

ENUM
  BFD_RELOC_SPARC_BASE13
ENUMX
  BFD_RELOC_SPARC_BASE22
ENUMDOC
  I think these are specific to SPARC a.out (e.g., Sun 4).

ENUMEQ
  BFD_RELOC_SPARC_64
  BFD_RELOC_64
ENUMX
  BFD_RELOC_SPARC_10
ENUMX
  BFD_RELOC_SPARC_11
ENUMX
  BFD_RELOC_SPARC_OLO10
ENUMX
  BFD_RELOC_SPARC_HH22
ENUMX
  BFD_RELOC_SPARC_HM10
ENUMX
  BFD_RELOC_SPARC_LM22
ENUMX
  BFD_RELOC_SPARC_PC_HH22
ENUMX
  BFD_RELOC_SPARC_PC_HM10
ENUMX
  BFD_RELOC_SPARC_PC_LM22
ENUMX
  BFD_RELOC_SPARC_WDISP16
ENUMX
  BFD_RELOC_SPARC_WDISP19
ENUMX
  BFD_RELOC_SPARC_7
ENUMX
  BFD_RELOC_SPARC_6
ENUMX
  BFD_RELOC_SPARC_5
ENUMEQX
  BFD_RELOC_SPARC_DISP64
  BFD_RELOC_64_PCREL
ENUMX
  BFD_RELOC_SPARC_PLT64
ENUMX
  BFD_RELOC_SPARC_HIX22
ENUMX
  BFD_RELOC_SPARC_LOX10
ENUMX
  BFD_RELOC_SPARC_H44
ENUMX
  BFD_RELOC_SPARC_M44
ENUMX
  BFD_RELOC_SPARC_L44
ENUMX
  BFD_RELOC_SPARC_REGISTER
ENUMDOC
  SPARC64 relocations

ENUM
  BFD_RELOC_ALPHA_GPDISP_HI16
ENUMDOC
  Alpha ECOFF and ELF relocations.  Some of these treat the symbol or
     "addend" in some special way.
  For GPDISP_HI16 ("gpdisp") relocations, the symbol is ignored when
     writing; when reading, it will be the absolute section symbol.  The
     addend is the displacement in bytes of the "lda" instruction from
     the "ldah" instruction (which is at the address of this reloc).
ENUM
  BFD_RELOC_ALPHA_GPDISP_LO16
ENUMDOC
  For GPDISP_LO16 ("ignore") relocations, the symbol is handled as
     with GPDISP_HI16 relocs.  The addend is ignored when writing the
     relocations out, and is filled in with the file's GP value on
     reading, for convenience.

ENUM
  BFD_RELOC_ALPHA_GPDISP
ENUMDOC
  The ELF GPDISP relocation is exactly the same as the GPDISP_HI16
     relocation except that there is no accompanying GPDISP_LO16
     relocation.

ENUM
  BFD_RELOC_ALPHA_LITERAL
ENUMX
  BFD_RELOC_ALPHA_ELF_LITERAL
ENUMX
  BFD_RELOC_ALPHA_LITUSE
ENUMDOC
  The Alpha LITERAL/LITUSE relocs are produced by a symbol reference;
     the assembler turns it into a LDQ instruction to load the address of
     the symbol, and then fills in a register in the real instruction.

     The LITERAL reloc, at the LDQ instruction, refers to the .lita
     section symbol.  The addend is ignored when writing, but is filled
     in with the file's GP value on reading, for convenience, as with the
     GPDISP_LO16 reloc.

     The ELF_LITERAL reloc is somewhere between 16_GOTOFF and GPDISP_LO16.
     It should refer to the symbol to be referenced, as with 16_GOTOFF,
     but it generates output not based on the position within the .got
     section, but relative to the GP value chosen for the file during the
     final link stage.

     The LITUSE reloc, on the instruction using the loaded address, gives
     information to the linker that it might be able to use to optimize
     away some literal section references.  The symbol is ignored (read
     as the absolute section symbol), and the "addend" indicates the type
     of instruction using the register:
              1 - "memory" fmt insn
              2 - byte-manipulation (byte offset reg)
              3 - jsr (target of branch)

     The GNU linker currently doesn't do any of this optimizing.

ENUM
  BFD_RELOC_ALPHA_HINT
ENUMDOC
  The HINT relocation indicates a value that should be filled into the
     "hint" field of a jmp/jsr/ret instruction, for possible branch-
     prediction logic which may be provided on some processors.

ENUM
  BFD_RELOC_ALPHA_LINKAGE
ENUMDOC
  The LINKAGE relocation outputs a linkage pair in the object file,
     which is filled by the linker.

ENUM
  BFD_RELOC_ALPHA_CODEADDR
ENUMDOC
  The CODEADDR relocation outputs a STO_CA in the object file,
     which is filled by the linker.

ENUM
  BFD_RELOC_MIPS_JMP
ENUMDOC
  Bits 27..2 of the relocation address shifted right 2 bits;
     simple reloc otherwise.

ENUM
  BFD_RELOC_MIPS16_JMP
ENUMDOC
  The MIPS16 jump instruction.

ENUM
  BFD_RELOC_MIPS16_GPREL
ENUMDOC
  MIPS16 GP relative reloc.

ENUM
  BFD_RELOC_HI16
ENUMDOC
  High 16 bits of 32-bit value; simple reloc.
ENUM
  BFD_RELOC_HI16_S
ENUMDOC
  High 16 bits of 32-bit value but the low 16 bits will be sign
     extended and added to form the final result.  If the low 16
     bits form a negative number, we need to add one to the high value
     to compensate for the borrow when the low bits are added.
ENUM
  BFD_RELOC_LO16
ENUMDOC
  Low 16 bits.
ENUM
  BFD_RELOC_PCREL_HI16_S
ENUMDOC
  Like BFD_RELOC_HI16_S, but PC relative.
ENUM
  BFD_RELOC_PCREL_LO16
ENUMDOC
  Like BFD_RELOC_LO16, but PC relative.

ENUMEQ
  BFD_RELOC_MIPS_GPREL
  BFD_RELOC_GPREL16
ENUMDOC
  Relocation relative to the global pointer.

ENUM
  BFD_RELOC_MIPS_LITERAL
ENUMDOC
  Relocation against a MIPS literal section.

ENUM
  BFD_RELOC_MIPS_GOT16
ENUMX
  BFD_RELOC_MIPS_CALL16
ENUMEQX
  BFD_RELOC_MIPS_GPREL32
  BFD_RELOC_GPREL32
ENUMX
  BFD_RELOC_MIPS_GOT_HI16
ENUMX
  BFD_RELOC_MIPS_GOT_LO16
ENUMX
  BFD_RELOC_MIPS_CALL_HI16
ENUMX
  BFD_RELOC_MIPS_CALL_LO16
ENUMDOC
  MIPS ELF relocations.

COMMENT
{* start-sanitize-sky *}
ENUM
  BFD_RELOC_MIPS_DVP_11_PCREL
ENUMDOC
  MIPS DVP Relocations.
  This is an 11-bit pc relative reloc.  The recorded address is for the
  lower instruction word, and the value is in 128 bit units.
COMMENT
{* end-sanitize-sky *}

ENUM
  BFD_RELOC_386_GOT32
ENUMX
  BFD_RELOC_386_PLT32
ENUMX
  BFD_RELOC_386_COPY
ENUMX
  BFD_RELOC_386_GLOB_DAT
ENUMX
  BFD_RELOC_386_JUMP_SLOT
ENUMX
  BFD_RELOC_386_RELATIVE
ENUMX
  BFD_RELOC_386_GOTOFF
ENUMX
  BFD_RELOC_386_GOTPC
ENUMDOC
  i386/elf relocations

ENUM
  BFD_RELOC_NS32K_IMM_8
ENUMX
  BFD_RELOC_NS32K_IMM_16
ENUMX
  BFD_RELOC_NS32K_IMM_32
ENUMX
  BFD_RELOC_NS32K_IMM_8_PCREL
ENUMX
  BFD_RELOC_NS32K_IMM_16_PCREL
ENUMX
  BFD_RELOC_NS32K_IMM_32_PCREL
ENUMX
  BFD_RELOC_NS32K_DISP_8
ENUMX
  BFD_RELOC_NS32K_DISP_16
ENUMX
  BFD_RELOC_NS32K_DISP_32
ENUMX
  BFD_RELOC_NS32K_DISP_8_PCREL
ENUMX
  BFD_RELOC_NS32K_DISP_16_PCREL
ENUMX
  BFD_RELOC_NS32K_DISP_32_PCREL
ENUMDOC
  ns32k relocations

ENUM
  BFD_RELOC_PPC_B26
ENUMX
  BFD_RELOC_PPC_BA26
ENUMX
  BFD_RELOC_PPC_TOC16
ENUMX
  BFD_RELOC_PPC_B16
ENUMX
  BFD_RELOC_PPC_B16_BRTAKEN
ENUMX
  BFD_RELOC_PPC_B16_BRNTAKEN
ENUMX
  BFD_RELOC_PPC_BA16
ENUMX
  BFD_RELOC_PPC_BA16_BRTAKEN
ENUMX
  BFD_RELOC_PPC_BA16_BRNTAKEN
ENUMX
  BFD_RELOC_PPC_COPY
ENUMX
  BFD_RELOC_PPC_GLOB_DAT
ENUMX
  BFD_RELOC_PPC_JMP_SLOT
ENUMX
  BFD_RELOC_PPC_RELATIVE
ENUMX
  BFD_RELOC_PPC_LOCAL24PC
ENUMX
  BFD_RELOC_PPC_EMB_NADDR32
ENUMX
  BFD_RELOC_PPC_EMB_NADDR16
ENUMX
  BFD_RELOC_PPC_EMB_NADDR16_LO
ENUMX
  BFD_RELOC_PPC_EMB_NADDR16_HI
ENUMX
  BFD_RELOC_PPC_EMB_NADDR16_HA
ENUMX
  BFD_RELOC_PPC_EMB_SDAI16
ENUMX
  BFD_RELOC_PPC_EMB_SDA2I16
ENUMX
  BFD_RELOC_PPC_EMB_SDA2REL
ENUMX
  BFD_RELOC_PPC_EMB_SDA21
ENUMX
  BFD_RELOC_PPC_EMB_MRKREF
ENUMX
  BFD_RELOC_PPC_EMB_RELSEC16
ENUMX
  BFD_RELOC_PPC_EMB_RELST_LO
ENUMX
  BFD_RELOC_PPC_EMB_RELST_HI
ENUMX
  BFD_RELOC_PPC_EMB_RELST_HA
ENUMX
  BFD_RELOC_PPC_EMB_BIT_FLD
ENUMX
  BFD_RELOC_PPC_EMB_RELSDA
ENUMDOC
  Power(rs6000) and PowerPC relocations.

ENUM
  BFD_RELOC_CTOR
ENUMDOC
  The type of reloc used to build a contructor table - at the moment
  probably a 32 bit wide absolute relocation, but the target can choose.
  It generally does map to one of the other relocation types.

ENUM
  BFD_RELOC_ARM_PCREL_BRANCH
ENUMDOC
  ARM 26 bit pc-relative branch.  The lowest two bits must be zero and are
  not stored in the instruction.
ENUM
  BFD_RELOC_ARM_IMMEDIATE
ENUMX
  BFD_RELOC_ARM_OFFSET_IMM
ENUMX
  BFD_RELOC_ARM_SHIFT_IMM
ENUMX
  BFD_RELOC_ARM_SWI
ENUMX
  BFD_RELOC_ARM_MULTI
ENUMX
  BFD_RELOC_ARM_CP_OFF_IMM
ENUMX
  BFD_RELOC_ARM_ADR_IMM
ENUMX
  BFD_RELOC_ARM_LDR_IMM
ENUMX
  BFD_RELOC_ARM_LITERAL
ENUMX
  BFD_RELOC_ARM_IN_POOL
ENUMX
  BFD_RELOC_ARM_OFFSET_IMM8
ENUMX
  BFD_RELOC_ARM_HWLITERAL
ENUMX
  BFD_RELOC_ARM_THUMB_ADD
ENUMX
  BFD_RELOC_ARM_THUMB_IMM
ENUMX
  BFD_RELOC_ARM_THUMB_SHIFT
ENUMX
  BFD_RELOC_ARM_THUMB_OFFSET
ENUMDOC
  These relocs are only used within the ARM assembler.  They are not
  (at present) written to any object files.

ENUM
  BFD_RELOC_SH_PCDISP8BY2
ENUMX
  BFD_RELOC_SH_PCDISP12BY2
ENUMX
  BFD_RELOC_SH_IMM4
ENUMX
  BFD_RELOC_SH_IMM4BY2
ENUMX
  BFD_RELOC_SH_IMM4BY4
ENUMX
  BFD_RELOC_SH_IMM8
ENUMX
  BFD_RELOC_SH_IMM8BY2
ENUMX
  BFD_RELOC_SH_IMM8BY4
ENUMX
  BFD_RELOC_SH_PCRELIMM8BY2
ENUMX
  BFD_RELOC_SH_PCRELIMM8BY4
ENUMX
  BFD_RELOC_SH_SWITCH16
ENUMX
  BFD_RELOC_SH_SWITCH32
ENUMX
  BFD_RELOC_SH_USES
ENUMX
  BFD_RELOC_SH_COUNT
ENUMX
  BFD_RELOC_SH_ALIGN
ENUMX
  BFD_RELOC_SH_CODE
ENUMX
  BFD_RELOC_SH_DATA
ENUMX
  BFD_RELOC_SH_LABEL
ENUMDOC
  Hitachi SH relocs.  Not all of these appear in object files.

ENUM
  BFD_RELOC_THUMB_PCREL_BRANCH9
ENUMX
  BFD_RELOC_THUMB_PCREL_BRANCH12
ENUMX
  BFD_RELOC_THUMB_PCREL_BRANCH23
ENUMDOC
  Thumb 23-, 12- and 9-bit pc-relative branches.  The lowest bit must
  be zero and is not stored in the instruction.

ENUM
  BFD_RELOC_ARC_B22_PCREL
ENUMDOC
  Argonaut RISC Core (ARC) relocs.
  ARC 22 bit pc-relative branch.  The lowest two bits must be zero and are
  not stored in the instruction.  The high 20 bits are installed in bits 26
  through 7 of the instruction.
ENUM
  BFD_RELOC_ARC_B26
ENUMDOC
  ARC 26 bit absolute branch.  The lowest two bits must be zero and are not
  stored in the instruction.  The high 24 bits are installed in bits 23
  through 0.

COMMENT
ENUM
  BFD_RELOC_D10V_10_PCREL_R
ENUMDOC
  Mitsubishi D10V relocs.
  This is a 10-bit reloc with the right 2 bits
  assumed to be 0.
ENUM
  BFD_RELOC_D10V_10_PCREL_L
ENUMDOC
  Mitsubishi D10V relocs.
  This is a 10-bit reloc with the right 2 bits
  assumed to be 0.  This is the same as the previous reloc
  except it is in the left container, i.e.,
  shifted left 15 bits.
ENUM
  BFD_RELOC_D10V_18
ENUMDOC
  This is an 18-bit reloc with the right 2 bits
  assumed to be 0.
ENUM
  BFD_RELOC_D10V_18_PCREL
ENUMDOC
  This is an 18-bit reloc with the right 2 bits
  assumed to be 0.
COMMENT

COMMENT
{* start-sanitize-d30v *}
ENUM
  BFD_RELOC_D30V_6
ENUMDOC
  Mitsubishi D30V relocs.
  This is a 6-bit absolute reloc.
ENUM
  BFD_RELOC_D30V_9_PCREL
ENUMDOC
  This is a 6-bit pc-relative reloc with 
  the right 3 bits assumed to be 0.  
ENUM
  BFD_RELOC_D30V_9_PCREL_R
ENUMDOC
  This is a 6-bit pc-relative reloc with 
  the right 3 bits assumed to be 0. Same
  as the previous reloc but on the right side
  of the container.  
ENUM
  BFD_RELOC_D30V_15
ENUMDOC
  This is a 12-bit absolute reloc with the 
  right 3 bitsassumed to be 0.  
ENUM
  BFD_RELOC_D30V_15_PCREL
ENUMDOC
  This is a 12-bit pc-relative reloc with 
  the right 3 bits assumed to be 0.  
ENUM
  BFD_RELOC_D30V_15_PCREL_R
ENUMDOC
  This is a 12-bit pc-relative reloc with 
  the right 3 bits assumed to be 0. Same
  as the previous reloc but on the right side
  of the container.  
ENUM
  BFD_RELOC_D30V_21
ENUMDOC
  This is an 18-bit absolute reloc with 
  the right 3 bits assumed to be 0.
ENUM
  BFD_RELOC_D30V_21_PCREL
ENUMDOC
  This is an 18-bit pc-relative reloc with 
  the right 3 bits assumed to be 0.
ENUM
  BFD_RELOC_D30V_21_PCREL_R
ENUMDOC
  This is an 18-bit pc-relative reloc with 
  the right 3 bits assumed to be 0. Same
  as the previous reloc but on the right side
  of the container.
ENUM
  BFD_RELOC_D30V_32
ENUMDOC
  This is a 32-bit absolute reloc.
ENUM
  BFD_RELOC_D30V_32_PCREL
ENUMDOC
  This is a 32-bit pc-relative reloc.
COMMENT
{* end-sanitize-d30v *}

ENUM
  BFD_RELOC_M32R_24
ENUMDOC
  Mitsubishi M32R relocs.
  This is a 24 bit absolute address.
ENUM
  BFD_RELOC_M32R_10_PCREL
ENUMDOC
  This is a 10-bit pc-relative reloc with the right 2 bits assumed to be 0.
ENUM
  BFD_RELOC_M32R_18_PCREL
ENUMDOC
  This is an 18-bit reloc with the right 2 bits assumed to be 0.
ENUM
  BFD_RELOC_M32R_26_PCREL
ENUMDOC
  This is a 26-bit reloc with the right 2 bits assumed to be 0.
ENUM
  BFD_RELOC_M32R_HI16_ULO
ENUMDOC
  This is a 16-bit reloc containing the high 16 bits of an address
  used when the lower 16 bits are treated as unsigned.
ENUM
  BFD_RELOC_M32R_HI16_SLO
ENUMDOC
  This is a 16-bit reloc containing the high 16 bits of an address
  used when the lower 16 bits are treated as signed.
ENUM
  BFD_RELOC_M32R_LO16
ENUMDOC
  This is a 16-bit reloc containing the lower 16 bits of an address.
ENUM
  BFD_RELOC_M32R_SDA16
ENUMDOC
  This is a 16-bit reloc containing the small data area offset for use in
  add3, load, and store instructions.

ENUM
  BFD_RELOC_V850_9_PCREL
ENUMDOC
  This is a 9-bit reloc
ENUM
  BFD_RELOC_V850_22_PCREL
ENUMDOC
  This is a 22-bit reloc

ENUM
  BFD_RELOC_V850_SDA_16_16_OFFSET
ENUMDOC
  This is a 16 bit offset from the short data area pointer.
ENUM
  BFD_RELOC_V850_SDA_15_16_OFFSET
ENUMDOC
  This is a 16 bit offset (of which only 15 bits are used) from the
  short data area pointer.
ENUM
  BFD_RELOC_V850_ZDA_16_16_OFFSET
ENUMDOC
  This is a 16 bit offset from the zero data area pointer.
ENUM
  BFD_RELOC_V850_ZDA_15_16_OFFSET
ENUMDOC
  This is a 16 bit offset (of which only 15 bits are used) from the
  zero data area pointer.
ENUM
  BFD_RELOC_V850_TDA_6_8_OFFSET
ENUMDOC
  This is an 8 bit offset (of which only 6 bits are used) from the
  tiny data area pointer.
ENUM
  BFD_RELOC_V850_TDA_7_8_OFFSET
ENUMDOC
  This is an 8bit offset (of which only 7 bits are used) from the tiny
  data area pointer.
ENUM
  BFD_RELOC_V850_TDA_7_7_OFFSET
ENUMDOC
  This is a 7 bit offset from the tiny data area pointer.
ENUM
  BFD_RELOC_V850_TDA_16_16_OFFSET
ENUMDOC
  This is a 16 bit offset from the tiny data area pointer.
COMMENT
{* start-sanitize-v850e *}
ENUM
  BFD_RELOC_V850_TDA_4_5_OFFSET
ENUMDOC
  This is a 5 bit offset (of which only 4 bits are used) from the tiny
  data area pointer.
ENUM
  BFD_RELOC_V850_TDA_4_4_OFFSET
ENUMDOC
  This is a 4 bit offset from the tiny data area pointer.
ENUM
  BFD_RELOC_V850_SDA_16_16_SPLIT_OFFSET
ENUMDOC
  This is a 16 bit offset from the short data area pointer, with the
  bits placed non-contigously in the instruction.
ENUM
  BFD_RELOC_V850_ZDA_16_16_SPLIT_OFFSET
ENUMDOC
  This is a 16 bit offset from the zero data area pointer, with the
  bits placed non-contigously in the instruction.
ENUM
  BFD_RELOC_V850_CALLT_6_7_OFFSET
ENUMDOC
  This is a 6 bit offset from the call table base pointer.
ENUM
  BFD_RELOC_V850_CALLT_16_16_OFFSET
ENUMDOC
  This is a 16 bit offset from the call table base pointer.
COMMENT
{* end-sanitize-v850e *}

ENUM
  BFD_RELOC_MN10300_32_PCREL
ENUMDOC
  This is a 32bit pcrel reloc for the mn10300, offset by two bytes in the
  instruction.
ENUM
  BFD_RELOC_MN10300_16_PCREL
ENUMDOC
  This is a 16bit pcrel reloc for the mn10300, offset by two bytes in the
  instruction.

ENUM
  BFD_RELOC_TIC30_LDP
ENUMDOC
  This is a 8bit DP reloc for the tms320c30, where the most
  significant 8 bits of a 24 bit word are placed into the least
  significant 8 bits of the opcode.

ENDSENUM
  BFD_RELOC_UNUSED
CODE_FRAGMENT
.
.typedef enum bfd_reloc_code_real bfd_reloc_code_real_type;
*/


/*
FUNCTION
	bfd_reloc_type_lookup

SYNOPSIS
	reloc_howto_type *
	bfd_reloc_type_lookup (bfd *abfd, bfd_reloc_code_real_type code);

DESCRIPTION
	Return a pointer to a howto structure which, when
	invoked, will perform the relocation @var{code} on data from the
	architecture noted.

*/


reloc_howto_type *
bfd_reloc_type_lookup (abfd, code)
     bfd *abfd;
     bfd_reloc_code_real_type code;
{
  return BFD_SEND (abfd, reloc_type_lookup, (abfd, code));
}

static reloc_howto_type bfd_howto_32 =
HOWTO (0, 00, 2, 32, false, 0, complain_overflow_bitfield, 0, "VRT32", false, 0xffffffff, 0xffffffff, true);


/*
INTERNAL_FUNCTION
	bfd_default_reloc_type_lookup

SYNOPSIS
	reloc_howto_type *bfd_default_reloc_type_lookup
	(bfd *abfd, bfd_reloc_code_real_type  code);

DESCRIPTION
	Provides a default relocation lookup routine for any architecture.


*/

reloc_howto_type *
bfd_default_reloc_type_lookup (abfd, code)
     bfd *abfd;
     bfd_reloc_code_real_type code;
{
  switch (code)
    {
    case BFD_RELOC_CTOR:
      /* The type of reloc used in a ctor, which will be as wide as the
	 address - so either a 64, 32, or 16 bitter.  */
      switch (bfd_get_arch_info (abfd)->bits_per_address)
	{
	case 64:
	  BFD_FAIL ();
	case 32:
	  return &bfd_howto_32;
	case 16:
	  BFD_FAIL ();
	default:
	  BFD_FAIL ();
	}
    default:
      BFD_FAIL ();
    }
  return (reloc_howto_type *) NULL;
}

/*
FUNCTION
	bfd_get_reloc_code_name

SYNOPSIS
	const char *bfd_get_reloc_code_name (bfd_reloc_code_real_type code);

DESCRIPTION
	Provides a printable name for the supplied relocation code.
	Useful mainly for printing error messages.
*/

const char *
bfd_get_reloc_code_name (code)
     bfd_reloc_code_real_type code;
{
  if (code > BFD_RELOC_UNUSED)
    return 0;
  return bfd_reloc_code_real_names[(int)code];
}

/*
INTERNAL_FUNCTION
	bfd_generic_relax_section

SYNOPSIS
	boolean bfd_generic_relax_section
	 (bfd *abfd,
	  asection *section,
	  struct bfd_link_info *,
	  boolean *);

DESCRIPTION
	Provides default handling for relaxing for back ends which
	don't do relaxing -- i.e., does nothing.
*/

/*ARGSUSED*/
boolean
bfd_generic_relax_section (abfd, section, link_info, again)
     bfd *abfd;
     asection *section;
     struct bfd_link_info *link_info;
     boolean *again;
{
  *again = false;
  return true;
}

/*
INTERNAL_FUNCTION
	bfd_generic_get_relocated_section_contents

SYNOPSIS
	bfd_byte *
	   bfd_generic_get_relocated_section_contents (bfd *abfd,
	     struct bfd_link_info *link_info,
	     struct bfd_link_order *link_order,
	     bfd_byte *data,
	     boolean relocateable,
	     asymbol **symbols);

DESCRIPTION
	Provides default handling of relocation effort for back ends
	which can't be bothered to do it efficiently.

*/

bfd_byte *
bfd_generic_get_relocated_section_contents (abfd, link_info, link_order, data,
					    relocateable, symbols)
     bfd *abfd;
     struct bfd_link_info *link_info;
     struct bfd_link_order *link_order;
     bfd_byte *data;
     boolean relocateable;
     asymbol **symbols;
{
  /* Get enough memory to hold the stuff */
  bfd *input_bfd = link_order->u.indirect.section->owner;
  asection *input_section = link_order->u.indirect.section;

  long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section);
  arelent **reloc_vector = NULL;
  long reloc_count;

  if (reloc_size < 0)
    goto error_return;

  reloc_vector = (arelent **) bfd_malloc ((size_t) reloc_size);
  if (reloc_vector == NULL && reloc_size != 0)
    goto error_return;

  /* read in the section */
  if (!bfd_get_section_contents (input_bfd,
				 input_section,
				 (PTR) data,
				 0,
				 input_section->_raw_size))
    goto error_return;

  /* We're not relaxing the section, so just copy the size info */
  input_section->_cooked_size = input_section->_raw_size;
  input_section->reloc_done = true;

  reloc_count = bfd_canonicalize_reloc (input_bfd,
					input_section,
					reloc_vector,
					symbols);
  if (reloc_count < 0)
    goto error_return;

  if (reloc_count > 0)
    {
      arelent **parent;
      for (parent = reloc_vector; *parent != (arelent *) NULL;
	   parent++)
	{
	  char *error_message = (char *) NULL;
	  bfd_reloc_status_type r =
	    bfd_perform_relocation (input_bfd,
				    *parent,
				    (PTR) data,
				    input_section,
				    relocateable ? abfd : (bfd *) NULL,
				    &error_message);

	  if (relocateable)
	    {
	      asection *os = input_section->output_section;

	      /* A partial link, so keep the relocs */
	      os->orelocation[os->reloc_count] = *parent;
	      os->reloc_count++;
	    }

	  if (r != bfd_reloc_ok)
	    {
	      switch (r)
		{
		case bfd_reloc_undefined:
		  if (!((*link_info->callbacks->undefined_symbol)
			(link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
			 input_bfd, input_section, (*parent)->address)))
		    goto error_return;
		  break;
		case bfd_reloc_dangerous:
		  BFD_ASSERT (error_message != (char *) NULL);
		  if (!((*link_info->callbacks->reloc_dangerous)
			(link_info, error_message, input_bfd, input_section,
			 (*parent)->address)))
		    goto error_return;
		  break;
		case bfd_reloc_overflow:
		  if (!((*link_info->callbacks->reloc_overflow)
			(link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
			 (*parent)->howto->name, (*parent)->addend,
			 input_bfd, input_section, (*parent)->address)))
		    goto error_return;
		  break;
		case bfd_reloc_outofrange:
		default:
		  abort ();
		  break;
		}

	    }
	}
    }
  if (reloc_vector != NULL)
    free (reloc_vector);
  return data;

error_return:
  if (reloc_vector != NULL)
    free (reloc_vector);
  return NULL;
}