aboutsummaryrefslogtreecommitdiff
path: root/bfd/elf32-i370.c
blob: 75a92f5e3eb986747d84474c3385d451b6ce2ed3 (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
/* i370-specific support for 32-bit ELF
   Copyright 1994, 1995, 1996, 1997, 1998, 2000, 2001, 2002, 2003, 2004
   Free Software Foundation, Inc.
   Written by Ian Lance Taylor, Cygnus Support.
   Hacked by Linas Vepstas for i370 linas@linas.org

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.  */

/* This file is based on a preliminary PowerPC ELF ABI.
   But its been hacked on for the IBM 360/370 architectures.
   Basically, the 31bit relocation works, and just about everything
   else is a wild card.  In particular, don't expect shared libs or
   dynamic loading to work ...  its never been tested ...
*/

#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/i370.h"

static reloc_howto_type *i370_elf_howto_table[ (int)R_I370_max ];

static reloc_howto_type i370_elf_howto_raw[] =
{
  /* This reloc does nothing.  */
  HOWTO (R_I370_NONE,		/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 32,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_I370_NONE",		/* name */
	 FALSE,			/* partial_inplace */
	 0,			/* src_mask */
	 0,			/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* A standard 31 bit relocation.  */
  HOWTO (R_I370_ADDR31,		/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 31,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_I370_ADDR31",	/* name */
	 FALSE,			/* partial_inplace */
	 0,			/* src_mask */
	 0x7fffffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* A standard 32 bit relocation.  */
  HOWTO (R_I370_ADDR32,		/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 32,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_I370_ADDR32",	/* name */
	 FALSE,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffffffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* A standard 16 bit relocation.  */
  HOWTO (R_I370_ADDR16,		/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_I370_ADDR16",	/* name */
	 FALSE,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* 31-bit PC relative */
  HOWTO (R_I370_REL31,		/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 31,			/* bitsize */
	 TRUE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_I370_REL31",	/* name */
	 FALSE,			/* partial_inplace */
	 0,			/* src_mask */
	 0x7fffffff,		/* dst_mask */
	 TRUE),			/* pcrel_offset */

  /* 32-bit PC relative */
  HOWTO (R_I370_REL32,		/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 32,			/* bitsize */
	 TRUE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_I370_REL32",	/* name */
	 FALSE,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffffffff,		/* dst_mask */
	 TRUE),			/* pcrel_offset */

  /* A standard 12 bit relocation.  */
  HOWTO (R_I370_ADDR12,		/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 12,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_I370_ADDR12",	/* name */
	 FALSE,			/* partial_inplace */
	 0,			/* src_mask */
	 0xfff,			/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* 12-bit PC relative */
  HOWTO (R_I370_REL12,		/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 12,			/* bitsize */
	 TRUE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_I370_REL12",	/* name */
	 FALSE,			/* partial_inplace */
	 0,			/* src_mask */
	 0xfff,			/* dst_mask */
	 TRUE),			/* pcrel_offset */

  /* A standard 8 bit relocation.  */
  HOWTO (R_I370_ADDR8,		/* type */
	 0,			/* rightshift */
	 0,			/* size (0 = byte, 1 = short, 2 = long) */
	 8,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_I370_ADDR8",	/* name */
	 FALSE,			/* partial_inplace */
	 0,			/* src_mask */
	 0xff,			/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* 8-bit PC relative */
  HOWTO (R_I370_REL8,		/* type */
	 0,			/* rightshift */
	 0,			/* size (0 = byte, 1 = short, 2 = long) */
	 8,			/* bitsize */
	 TRUE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_I370_REL8",		/* name */
	 FALSE,			/* partial_inplace */
	 0,			/* src_mask */
	 0xff,			/* dst_mask */
	 TRUE),			/* pcrel_offset */

  /* This is used only by the dynamic linker.  The symbol should exist
     both in the object being run and in some shared library.  The
     dynamic linker copies the data addressed by the symbol from the
     shared library into the object, because the object being
     run has to have the data at some particular address.  */
  HOWTO (R_I370_COPY,		/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 32,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	 /* special_function */
	 "R_I370_COPY",		/* name */
	 FALSE,			/* partial_inplace */
	 0,			/* src_mask */
	 0,			/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* Used only by the dynamic linker.  When the object is run, this
     longword is set to the load address of the object, plus the
     addend.  */
  HOWTO (R_I370_RELATIVE,	/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 32,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	 /* special_function */
	 "R_I370_RELATIVE",	/* name */
	 FALSE,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffffffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

};

static void i370_elf_howto_init
  PARAMS ((void));
static reloc_howto_type *i370_elf_reloc_type_lookup
  PARAMS ((bfd *, bfd_reloc_code_real_type));
static void i370_elf_info_to_howto
  PARAMS ((bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst));
static bfd_boolean i370_elf_set_private_flags
  PARAMS ((bfd *, flagword));

/* Initialize the i370_elf_howto_table, so that linear accesses can be done.  */

static void
i370_elf_howto_init ()
{
  unsigned int i, type;

  for (i = 0; i < sizeof (i370_elf_howto_raw) / sizeof (i370_elf_howto_raw[0]); i++)
    {
      type = i370_elf_howto_raw[i].type;
      BFD_ASSERT (type < sizeof (i370_elf_howto_table) / sizeof (i370_elf_howto_table[0]));
      i370_elf_howto_table[type] = &i370_elf_howto_raw[i];
    }
}

static reloc_howto_type *
i370_elf_reloc_type_lookup (abfd, code)
     bfd *abfd ATTRIBUTE_UNUSED;
     bfd_reloc_code_real_type code;
{
  enum i370_reloc_type i370_reloc = R_I370_NONE;

  if (!i370_elf_howto_table[ R_I370_ADDR31 ])	/* Initialize howto table if needed */
    i370_elf_howto_init ();

  switch ((int)code)
    {
    default:
      return (reloc_howto_type *)NULL;

    case BFD_RELOC_NONE:	i370_reloc = R_I370_NONE;	break;
    case BFD_RELOC_32:		i370_reloc = R_I370_ADDR31;	break;
    case BFD_RELOC_16:		i370_reloc = R_I370_ADDR16;	break;
    case BFD_RELOC_32_PCREL:	i370_reloc = R_I370_REL31;	break;
    case BFD_RELOC_CTOR:	i370_reloc = R_I370_ADDR31;	break;
    case BFD_RELOC_I370_D12:	i370_reloc = R_I370_ADDR12;	break;
    }

  return i370_elf_howto_table[ (int)i370_reloc ];
};

static bfd_boolean i370_elf_merge_private_bfd_data
  PARAMS ((bfd *, bfd *));
static bfd_boolean i370_elf_relocate_section
  PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *,
	   Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
	   asection **));
static void i370_elf_post_process_headers
  PARAMS ((bfd *, struct bfd_link_info *));
static bfd_boolean i370_elf_create_dynamic_sections
  PARAMS ((bfd *, struct bfd_link_info *));
static bfd_boolean i370_elf_section_from_shdr
  PARAMS ((bfd *, Elf_Internal_Shdr *, const char *));
static bfd_boolean i370_elf_fake_sections
  PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
static bfd_boolean i370_elf_check_relocs
  PARAMS ((bfd *, struct bfd_link_info *, asection *,
	   const Elf_Internal_Rela *));
static bfd_boolean i370_elf_adjust_dynamic_symbol
  PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
static bfd_boolean i370_elf_adjust_dynindx
  PARAMS ((struct elf_link_hash_entry *, PTR));
static bfd_boolean i370_elf_size_dynamic_sections
  PARAMS ((bfd *, struct bfd_link_info *));
static bfd_boolean i370_elf_finish_dynamic_sections
  PARAMS ((bfd *, struct bfd_link_info *));

/* The name of the dynamic interpreter.  This is put in the .interp
    section.  */

#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so"

/* Set the howto pointer for an i370 ELF reloc.  */

static void
i370_elf_info_to_howto (abfd, cache_ptr, dst)
     bfd *abfd ATTRIBUTE_UNUSED;
     arelent *cache_ptr;
     Elf_Internal_Rela *dst;
{
  if (!i370_elf_howto_table[ R_I370_ADDR31 ])	/* Initialize howto table */
    i370_elf_howto_init ();

  BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_I370_max);
  cache_ptr->howto = i370_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
}

/* hack alert --  the following several routines look generic to me ...
 * why are we bothering with them ???
 */
/* Function to set whether a module needs the -mrelocatable bit set.  */
static bfd_boolean
i370_elf_set_private_flags (abfd, flags)
     bfd *abfd;
     flagword flags;
{
  BFD_ASSERT (!elf_flags_init (abfd)
	      || elf_elfheader (abfd)->e_flags == flags);

  elf_elfheader (abfd)->e_flags = flags;
  elf_flags_init (abfd) = TRUE;
  return TRUE;
}

/* Merge backend specific data from an object file to the output
   object file when linking */
static bfd_boolean
i370_elf_merge_private_bfd_data (ibfd, obfd)
     bfd *ibfd;
     bfd *obfd;
{
  flagword old_flags;
  flagword new_flags;

  if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
      || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
    return TRUE;

  new_flags = elf_elfheader (ibfd)->e_flags;
  old_flags = elf_elfheader (obfd)->e_flags;
  if (!elf_flags_init (obfd))	/* First call, no flags set */
    {
      elf_flags_init (obfd) = TRUE;
      elf_elfheader (obfd)->e_flags = new_flags;
    }

  else if (new_flags == old_flags)	/* Compatible flags are ok */
    ;

  else					/* Incompatible flags */
    {
      (*_bfd_error_handler)
	("%B: uses different e_flags (0x%lx) fields than previous modules (0x%lx)",
	 ibfd, (long) new_flags, (long) old_flags);

      bfd_set_error (bfd_error_bad_value);
      return FALSE;
    }

  return TRUE;
}

/* Handle an i370 specific section when reading an object file.  This
   is called when elfcode.h finds a section with an unknown type.  */
/* XXX hack alert bogus This routine is mostly all junk and almost
 * certainly does the wrong thing.  Its here simply because it does
 * just enough to allow glibc-2.1 ld.so to compile & link.
 */

static bfd_boolean
i370_elf_section_from_shdr (abfd, hdr, name)
     bfd *abfd;
     Elf_Internal_Shdr *hdr;
     const char *name;
{
  asection *newsect;
  flagword flags;

  if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
    return FALSE;

  newsect = hdr->bfd_section;
  flags = bfd_get_section_flags (abfd, newsect);
  if (hdr->sh_flags & SHF_EXCLUDE)
    flags |= SEC_EXCLUDE;

  if (hdr->sh_type == SHT_ORDERED)
    flags |= SEC_SORT_ENTRIES;

  bfd_set_section_flags (abfd, newsect, flags);
  return TRUE;
}

/* Set up any other section flags and such that may be necessary.  */
/* XXX hack alert bogus This routine is mostly all junk and almost
 * certainly does the wrong thing.  Its here simply because it does
 * just enough to allow glibc-2.1 ld.so to compile & link.
 */

static bfd_boolean
i370_elf_fake_sections (abfd, shdr, asect)
     bfd *abfd ATTRIBUTE_UNUSED;
     Elf_Internal_Shdr *shdr;
     asection *asect;
{
  if ((asect->flags & SEC_EXCLUDE) != 0)
    shdr->sh_flags |= SHF_EXCLUDE;

  if ((asect->flags & SEC_SORT_ENTRIES) != 0)
    shdr->sh_type = SHT_ORDERED;

  return TRUE;
}

/* We have to create .dynsbss and .rela.sbss here so that they get mapped
   to output sections (just like _bfd_elf_create_dynamic_sections has
   to create .dynbss and .rela.bss).  */
/* XXX hack alert bogus This routine is mostly all junk and almost
 * certainly does the wrong thing.  Its here simply because it does
 * just enough to allow glibc-2.1 ld.so to compile & link.
 */

static bfd_boolean
i370_elf_create_dynamic_sections (abfd, info)
     bfd *abfd;
     struct bfd_link_info *info;
{
  register asection *s;
  flagword flags;

  if (!_bfd_elf_create_dynamic_sections(abfd, info))
    return FALSE;

  flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
	   | SEC_LINKER_CREATED);

  s = bfd_make_section (abfd, ".dynsbss");
  if (s == NULL
      || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
    return FALSE;

  if (! info->shared)
    {
      s = bfd_make_section (abfd, ".rela.sbss");
      if (s == NULL
	  || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
	  || ! bfd_set_section_alignment (abfd, s, 2))
	return FALSE;
    }

   /* xxx beats me, seem to need a rela.text ...  */
   s = bfd_make_section (abfd, ".rela.text");
   if (s == NULL
      || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
      || ! bfd_set_section_alignment (abfd, s, 2))
    return FALSE;
  return TRUE;
}

/* Adjust a symbol defined by a dynamic object and referenced by a
   regular object.  The current definition is in some section of the
   dynamic object, but we're not including those sections.  We have to
   change the definition to something the rest of the link can
   understand.  */
/* XXX hack alert bogus This routine is mostly all junk and almost
 * certainly does the wrong thing.  Its here simply because it does
 * just enough to allow glibc-2.1 ld.so to compile & link.
 */

static bfd_boolean
i370_elf_adjust_dynamic_symbol (info, h)
     struct bfd_link_info *info;
     struct elf_link_hash_entry *h;
{
  bfd *dynobj = elf_hash_table (info)->dynobj;
  asection *s;
  unsigned int power_of_two;

#ifdef DEBUG
  fprintf (stderr, "i370_elf_adjust_dynamic_symbol called for %s\n",
	   h->root.root.string);
#endif

  /* Make sure we know what is going on here.  */
  BFD_ASSERT (dynobj != NULL
	      && (h->needs_plt
		  || h->weakdef != NULL
		  || (h->def_dynamic
		      && h->ref_regular
		      && !h->def_regular)));

  s = bfd_get_section_by_name (dynobj, ".rela.text");
  BFD_ASSERT (s != NULL);
  s->size += sizeof (Elf32_External_Rela);

  /* If this is a weak symbol, and there is a real definition, the
     processor independent code will have arranged for us to see the
     real definition first, and we can just use the same value.  */
  if (h->weakdef != NULL)
    {
      BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
		  || h->weakdef->root.type == bfd_link_hash_defweak);
      h->root.u.def.section = h->weakdef->root.u.def.section;
      h->root.u.def.value = h->weakdef->root.u.def.value;
      return TRUE;
    }

  /* This is a reference to a symbol defined by a dynamic object which
     is not a function.  */

  /* If we are creating a shared library, we must presume that the
     only references to the symbol are via the global offset table.
     For such cases we need not do anything here; the relocations will
     be handled correctly by relocate_section.  */
  if (info->shared)
    return TRUE;

  /* We must allocate the symbol in our .dynbss section, which will
     become part of the .bss section of the executable.  There will be
     an entry for this symbol in the .dynsym section.  The dynamic
     object will contain position independent code, so all references
     from the dynamic object to this symbol will go through the global
     offset table.  The dynamic linker will use the .dynsym entry to
     determine the address it must put in the global offset table, so
     both the dynamic object and the regular object will refer to the
     same memory location for the variable.

     Of course, if the symbol is sufficiently small, we must instead
     allocate it in .sbss.  FIXME: It would be better to do this if and
     only if there were actually SDAREL relocs for that symbol.  */

  if (h->size <= elf_gp_size (dynobj))
    s = bfd_get_section_by_name (dynobj, ".dynsbss");
  else
    s = bfd_get_section_by_name (dynobj, ".dynbss");
  BFD_ASSERT (s != NULL);

  /* We must generate a R_I370_COPY reloc to tell the dynamic linker to
     copy the initial value out of the dynamic object and into the
     runtime process image.  We need to remember the offset into the
     .rela.bss section we are going to use.  */
  if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
    {
      asection *srel;

      if (h->size <= elf_gp_size (dynobj))
	srel = bfd_get_section_by_name (dynobj, ".rela.sbss");
      else
	srel = bfd_get_section_by_name (dynobj, ".rela.bss");
      BFD_ASSERT (srel != NULL);
      srel->size += sizeof (Elf32_External_Rela);
      h->needs_copy = 1;
    }

  /* We need to figure out the alignment required for this symbol.  I
     have no idea how ELF linkers handle this.  */
  power_of_two = bfd_log2 (h->size);
  if (power_of_two > 4)
    power_of_two = 4;

  /* Apply the required alignment.  */
  s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
  if (power_of_two > bfd_get_section_alignment (dynobj, s))
    {
      if (! bfd_set_section_alignment (dynobj, s, power_of_two))
	return FALSE;
    }

  /* Define the symbol as being at this point in the section.  */
  h->root.u.def.section = s;
  h->root.u.def.value = s->size;

  /* Increment the section size to make room for the symbol.  */
  s->size += h->size;

  return TRUE;
}

/* Increment the index of a dynamic symbol by a given amount.  Called
   via elf_link_hash_traverse.  */
/* XXX hack alert bogus This routine is mostly all junk and almost
 * certainly does the wrong thing.  Its here simply because it does
 * just enough to allow glibc-2.1 ld.so to compile & link.
 */

static bfd_boolean
i370_elf_adjust_dynindx (h, cparg)
     struct elf_link_hash_entry *h;
     PTR cparg;
{
  int *cp = (int *) cparg;

#ifdef DEBUG
  fprintf (stderr,
	   "i370_elf_adjust_dynindx called, h->dynindx = %d, *cp = %d\n",
	   h->dynindx, *cp);
#endif

  if (h->root.type == bfd_link_hash_warning)
    h = (struct elf_link_hash_entry *) h->root.u.i.link;

  if (h->dynindx != -1)
    h->dynindx += *cp;

  return TRUE;
}

/* Set the sizes of the dynamic sections.  */
/* XXX hack alert bogus This routine is mostly all junk and almost
 * certainly does the wrong thing.  Its here simply because it does
 * just enough to allow glibc-2.1 ld.so to compile & link.
 */

static bfd_boolean
i370_elf_size_dynamic_sections (output_bfd, info)
     bfd *output_bfd;
     struct bfd_link_info *info;
{
  bfd *dynobj;
  asection *s;
  bfd_boolean plt;
  bfd_boolean relocs;
  bfd_boolean reltext;

#ifdef DEBUG
  fprintf (stderr, "i370_elf_size_dynamic_sections called\n");
#endif

  dynobj = elf_hash_table (info)->dynobj;
  BFD_ASSERT (dynobj != NULL);

  if (elf_hash_table (info)->dynamic_sections_created)
    {
      /* Set the contents of the .interp section to the interpreter.  */
      if (info->executable)
	{
	  s = bfd_get_section_by_name (dynobj, ".interp");
	  BFD_ASSERT (s != NULL);
	  s->size = sizeof ELF_DYNAMIC_INTERPRETER;
	  s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
	}
    }
  else
    {
      /* We may have created entries in the .rela.got, .rela.sdata, and
	 .rela.sdata2 sections.  However, if we are not creating the
	 dynamic sections, we will not actually use these entries.  Reset
	 the size of .rela.got, et al, which will cause it to get
	 stripped from the output file below.  */
      static char *rela_sections[] = { ".rela.got", ".rela.sdata",
				       ".rela.sdata2", ".rela.sbss",
				       (char *)0 };
      char **p;

      for (p = rela_sections; *p != (char *)0; p++)
	{
	  s = bfd_get_section_by_name (dynobj, *p);
	  if (s != NULL)
	    s->size = 0;
	}
    }

  /* The check_relocs and adjust_dynamic_symbol entry points have
     determined the sizes of the various dynamic sections.  Allocate
     memory for them.  */
  plt = FALSE;
  relocs = FALSE;
  reltext = FALSE;
  for (s = dynobj->sections; s != NULL; s = s->next)
    {
      const char *name;
      bfd_boolean strip;

      if ((s->flags & SEC_LINKER_CREATED) == 0)
	continue;

      /* It's OK to base decisions on the section name, because none
	 of the dynobj section names depend upon the input files.  */
      name = bfd_get_section_name (dynobj, s);
      strip = FALSE;

      if (strcmp (name, ".plt") == 0)
	{
	  if (s->size == 0)
	    {
	      /* Strip this section if we don't need it; see the
                 comment below.  */
	      strip = TRUE;
	    }
	  else
	    {
	      /* Remember whether there is a PLT.  */
	      plt = TRUE;
	    }
	}
      else if (strncmp (name, ".rela", 5) == 0)
	{
	  if (s->size == 0)
	    {
	      /* If we don't need this section, strip it from the
		 output file.  This is mostly to handle .rela.bss and
		 .rela.plt.  We must create both sections in
		 create_dynamic_sections, because they must be created
		 before the linker maps input sections to output
		 sections.  The linker does that before
		 adjust_dynamic_symbol is called, and it is that
		 function which decides whether anything needs to go
		 into these sections.  */
	      strip = TRUE;
	    }
	  else
	    {
	      asection *target;
	      const char *outname;

	      /* Remember whether there are any relocation sections.  */
	      relocs = TRUE;

	      /* If this relocation section applies to a read only
		 section, then we probably need a DT_TEXTREL entry.  */
	      outname = bfd_get_section_name (output_bfd,
					      s->output_section);
	      target = bfd_get_section_by_name (output_bfd, outname + 5);
	      if (target != NULL
		  && (target->flags & SEC_READONLY) != 0
		  && (target->flags & SEC_ALLOC) != 0)
		reltext = TRUE;

	      /* We use the reloc_count field as a counter if we need
		 to copy relocs into the output file.  */
	      s->reloc_count = 0;
	    }
	}
      else if (strcmp (name, ".got") != 0
	       && strcmp (name, ".sdata") != 0
	       && strcmp (name, ".sdata2") != 0)
	{
	  /* It's not one of our sections, so don't allocate space.  */
	  continue;
	}

      if (strip)
	{
	  asection **spp;

	  for (spp = &s->output_section->owner->sections;
	       *spp != NULL;
	       spp = &(*spp)->next)
	    {
	      if (*spp == s->output_section)
		{
		  bfd_section_list_remove (s->output_section->owner, spp);
		  --s->output_section->owner->section_count;
		  break;
		}
	    }
	  continue;
	}
      /* Allocate memory for the section contents.  */
      s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
      if (s->contents == NULL && s->size != 0)
	return FALSE;
    }

  if (elf_hash_table (info)->dynamic_sections_created)
    {
      /* Add some entries to the .dynamic section.  We fill in the
	 values later, in i370_elf_finish_dynamic_sections, but we
	 must add the entries now so that we get the correct size for
	 the .dynamic section.  The DT_DEBUG entry is filled in by the
	 dynamic linker and used by the debugger.  */
#define add_dynamic_entry(TAG, VAL) \
  _bfd_elf_add_dynamic_entry (info, TAG, VAL)

      if (!info->shared)
	{
	  if (!add_dynamic_entry (DT_DEBUG, 0))
	    return FALSE;
	}

      if (plt)
	{
	  if (!add_dynamic_entry (DT_PLTGOT, 0)
	      || !add_dynamic_entry (DT_PLTRELSZ, 0)
	      || !add_dynamic_entry (DT_PLTREL, DT_RELA)
	      || !add_dynamic_entry (DT_JMPREL, 0))
	    return FALSE;
	}

      if (relocs)
	{
	  if (!add_dynamic_entry (DT_RELA, 0)
	      || !add_dynamic_entry (DT_RELASZ, 0)
	      || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
	    return FALSE;
	}

      if (reltext)
	{
	  if (!add_dynamic_entry (DT_TEXTREL, 0))
	    return FALSE;
	  info->flags |= DF_TEXTREL;
	}
    }
#undef add_dynamic_entry

  /* If we are generating a shared library, we generate a section
     symbol for each output section.  These are local symbols, which
     means that they must come first in the dynamic symbol table.
     That means we must increment the dynamic symbol index of every
     other dynamic symbol.

     FIXME: We assume that there will never be relocations to
     locations in linker-created sections that do not have
     externally-visible names. Instead, we should work out precisely
     which sections relocations are targeted at.  */
  if (info->shared)
    {
      int c;

      for (c = 0, s = output_bfd->sections; s != NULL; s = s->next)
	{
	  if ((s->flags & SEC_LINKER_CREATED) != 0
	      || (s->flags & SEC_ALLOC) == 0)
	    {
	      elf_section_data (s)->dynindx = -1;
	      continue;
	    }

	  /* These symbols will have no names, so we don't need to
	     fiddle with dynstr_index.  */

	  elf_section_data (s)->dynindx = c + 1;

	  c++;
	}

      elf_link_hash_traverse (elf_hash_table (info),
			      i370_elf_adjust_dynindx,
			      (PTR) &c);
      elf_hash_table (info)->dynsymcount += c;
    }

  return TRUE;
}

/* Look through the relocs for a section during the first phase, and
   allocate space in the global offset table or procedure linkage
   table.  */
/* XXX hack alert bogus This routine is mostly all junk and almost
 * certainly does the wrong thing.  Its here simply because it does
 * just enough to allow glibc-2.1 ld.so to compile & link.
 */

static bfd_boolean
i370_elf_check_relocs (abfd, info, sec, relocs)
     bfd *abfd;
     struct bfd_link_info *info;
     asection *sec;
     const Elf_Internal_Rela *relocs;
{
  bfd *dynobj;
  Elf_Internal_Shdr *symtab_hdr;
  struct elf_link_hash_entry **sym_hashes;
  const Elf_Internal_Rela *rel;
  const Elf_Internal_Rela *rel_end;
  bfd_vma *local_got_offsets;
  asection *sreloc;

  if (info->relocatable)
    return TRUE;

#ifdef DEBUG
  _bfd_error_handler ("i370_elf_check_relocs called for section %A in %B",
		      sec, abfd);
#endif

  dynobj = elf_hash_table (info)->dynobj;
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
  sym_hashes = elf_sym_hashes (abfd);
  local_got_offsets = elf_local_got_offsets (abfd);

  sreloc = NULL;

  rel_end = relocs + sec->reloc_count;
  for (rel = relocs; rel < rel_end; rel++)
    {
      unsigned long r_symndx;
      struct elf_link_hash_entry *h;

      r_symndx = ELF32_R_SYM (rel->r_info);
      if (r_symndx < symtab_hdr->sh_info)
	h = NULL;
      else
	h = sym_hashes[r_symndx - symtab_hdr->sh_info];

      if (info->shared)
	{
#ifdef DEBUG
	  fprintf (stderr,
		   "i370_elf_check_relocs needs to create relocation for %s\n",
		   (h && h->root.root.string)
		   ? h->root.root.string : "<unknown>");
#endif
	  if (sreloc == NULL)
	    {
	      const char *name;

	      name = (bfd_elf_string_from_elf_section
		      (abfd,
		       elf_elfheader (abfd)->e_shstrndx,
		       elf_section_data (sec)->rel_hdr.sh_name));
	      if (name == NULL)
		return FALSE;

	      BFD_ASSERT (strncmp (name, ".rela", 5) == 0
			  && strcmp (bfd_get_section_name (abfd, sec), name + 5) == 0);

	      sreloc = bfd_get_section_by_name (dynobj, name);
	      if (sreloc == NULL)
		{
		  flagword flags;

		  sreloc = bfd_make_section (dynobj, name);
		  flags = (SEC_HAS_CONTENTS | SEC_READONLY
			   | SEC_IN_MEMORY | SEC_LINKER_CREATED);
		  if ((sec->flags & SEC_ALLOC) != 0)
		    flags |= SEC_ALLOC | SEC_LOAD;
		  if (sreloc == NULL
		      || ! bfd_set_section_flags (dynobj, sreloc, flags)
		      || ! bfd_set_section_alignment (dynobj, sreloc, 2))
		    return FALSE;
		}
	    }

	  sreloc->size += sizeof (Elf32_External_Rela);

	  /* FIXME: We should here do what the m68k and i386
	     backends do: if the reloc is pc-relative, record it
	     in case it turns out that the reloc is unnecessary
	     because the symbol is forced local by versioning or
	     we are linking with -Bdynamic.  Fortunately this
	     case is not frequent.  */
	}
    }

  return TRUE;
}

/* Finish up the dynamic sections.  */
/* XXX hack alert bogus This routine is mostly all junk and almost
 * certainly does the wrong thing.  Its here simply because it does
 * just enough to allow glibc-2.1 ld.so to compile & link.
 */

static bfd_boolean
i370_elf_finish_dynamic_sections (output_bfd, info)
     bfd *output_bfd;
     struct bfd_link_info *info;
{
  asection *sdyn;
  bfd *dynobj = elf_hash_table (info)->dynobj;
  asection *sgot = bfd_get_section_by_name (dynobj, ".got");

#ifdef DEBUG
  fprintf (stderr, "i370_elf_finish_dynamic_sections called\n");
#endif

  sdyn = bfd_get_section_by_name (dynobj, ".dynamic");

  if (elf_hash_table (info)->dynamic_sections_created)
    {
      asection *splt;
      Elf32_External_Dyn *dyncon, *dynconend;

      splt = bfd_get_section_by_name (dynobj, ".plt");
      BFD_ASSERT (splt != NULL && sdyn != NULL);

      dyncon = (Elf32_External_Dyn *) sdyn->contents;
      dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
      for (; dyncon < dynconend; dyncon++)
	{
	  Elf_Internal_Dyn dyn;
	  const char *name;
	  bfd_boolean size;

	  bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);

	  switch (dyn.d_tag)
	    {
	    case DT_PLTGOT:   name = ".plt";	  size = FALSE; break;
	    case DT_PLTRELSZ: name = ".rela.plt"; size = TRUE;  break;
	    case DT_JMPREL:   name = ".rela.plt"; size = FALSE; break;
	    default:	      name = NULL;	  size = FALSE; break;
	    }

	  if (name != NULL)
	    {
	      asection *s;

	      s = bfd_get_section_by_name (output_bfd, name);
	      if (s == NULL)
		dyn.d_un.d_val = 0;
	      else
		{
		  if (! size)
		    dyn.d_un.d_ptr = s->vma;
		  else
		    dyn.d_un.d_val = s->size;
		}
	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
	    }
	}
    }

  /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
     easily find the address of the _GLOBAL_OFFSET_TABLE_.  */
/* XXX this is clearly very wrong for the 370 arch */
  if (sgot)
    {
      unsigned char *contents = sgot->contents;
      bfd_put_32 (output_bfd, (bfd_vma) 0x4e800021 /* blrl */, contents);

      if (sdyn == NULL)
	bfd_put_32 (output_bfd, (bfd_vma) 0, contents+4);
      else
	bfd_put_32 (output_bfd,
		    sdyn->output_section->vma + sdyn->output_offset,
		    contents+4);

      elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
    }

  if (info->shared)
    {
      asection *sdynsym;
      asection *s;
      Elf_Internal_Sym sym;
      int maxdindx = 0;

      /* Set up the section symbols for the output sections.  */

      sdynsym = bfd_get_section_by_name (dynobj, ".dynsym");
      BFD_ASSERT (sdynsym != NULL);

      sym.st_size = 0;
      sym.st_name = 0;
      sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
      sym.st_other = 0;

      for (s = output_bfd->sections; s != NULL; s = s->next)
	{
	  int indx, dindx;
	  Elf32_External_Sym *esym;

	  sym.st_value = s->vma;

	  indx = elf_section_data (s)->this_idx;
	  dindx = elf_section_data (s)->dynindx;
	  if (dindx != -1)
	    {
	      BFD_ASSERT(indx > 0);
	      BFD_ASSERT(dindx > 0);

	      if (dindx > maxdindx)
		maxdindx = dindx;

	      sym.st_shndx = indx;

	      esym = (Elf32_External_Sym *) sdynsym->contents + dindx;
	      bfd_elf32_swap_symbol_out (output_bfd, &sym, (PTR) esym, (PTR) 0);
	    }
	}

      /* Set the sh_info field of the output .dynsym section to the
         index of the first global symbol.  */
      elf_section_data (sdynsym->output_section)->this_hdr.sh_info =
	maxdindx + 1;
    }

  return TRUE;
}

/* The RELOCATE_SECTION function is called by the ELF backend linker
   to handle the relocations for a section.

   The relocs are always passed as Rela structures; if the section
   actually uses Rel structures, the r_addend field will always be
   zero.

   This function is responsible for adjust the section contents as
   necessary, and (if using Rela relocs and generating a
   relocatable output file) adjusting the reloc addend as
   necessary.

   This function does not have to worry about setting the reloc
   address or the reloc symbol index.

   LOCAL_SYMS is a pointer to the swapped in local symbols.

   LOCAL_SECTIONS is an array giving the section in the input file
   corresponding to the st_shndx field of each local symbol.

   The global hash table entry for the global symbols can be found
   via elf_sym_hashes (input_bfd).

   When generating relocatable output, this function must handle
   STB_LOCAL/STT_SECTION symbols specially.  The output symbol is
   going to be the section symbol corresponding to the output
   section, which means that the addend must be adjusted
   accordingly.  */

static bfd_boolean
i370_elf_relocate_section (output_bfd, info, input_bfd, input_section,
			   contents, relocs, local_syms, local_sections)
     bfd *output_bfd;
     struct bfd_link_info *info;
     bfd *input_bfd;
     asection *input_section;
     bfd_byte *contents;
     Elf_Internal_Rela *relocs;
     Elf_Internal_Sym *local_syms;
     asection **local_sections;
{
  Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
  struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
  bfd *dynobj = elf_hash_table (info)->dynobj;
  Elf_Internal_Rela *rel = relocs;
  Elf_Internal_Rela *relend = relocs + input_section->reloc_count;
  asection *sreloc = NULL;
  bfd_vma *local_got_offsets;
  bfd_boolean ret = TRUE;

  if (info->relocatable)
    return TRUE;

#ifdef DEBUG
  _bfd_error_handler ("i370_elf_relocate_section called for %B section %A, %ld relocations%s",
		      input_bfd, input_section,
		      (long) input_section->reloc_count,
		      (info->relocatable) ? " (relocatable)" : "");
#endif

  if (!i370_elf_howto_table[ R_I370_ADDR31 ])	/* Initialize howto table if needed */
    i370_elf_howto_init ();

  local_got_offsets = elf_local_got_offsets (input_bfd);

  for (; rel < relend; rel++)
    {
      enum i370_reloc_type r_type	= (enum i370_reloc_type)ELF32_R_TYPE (rel->r_info);
      bfd_vma offset			= rel->r_offset;
      bfd_vma addend			= rel->r_addend;
      bfd_reloc_status_type r		= bfd_reloc_other;
      Elf_Internal_Sym *sym		= (Elf_Internal_Sym *)0;
      asection *sec			= (asection *)0;
      struct elf_link_hash_entry *h	= (struct elf_link_hash_entry *)0;
      const char *sym_name		= (const char *)0;
      reloc_howto_type *howto;
      unsigned long r_symndx;
      bfd_vma relocation;

      /* Unknown relocation handling */
      if ((unsigned)r_type >= (unsigned)R_I370_max
	  || !i370_elf_howto_table[(int)r_type])
	{
	  (*_bfd_error_handler) ("%B: unknown relocation type %d",
				 input_bfd,
				 (int) r_type);

	  bfd_set_error (bfd_error_bad_value);
	  ret = FALSE;
	  continue;
	}

      howto = i370_elf_howto_table[(int)r_type];
      r_symndx = ELF32_R_SYM (rel->r_info);

      if (r_symndx < symtab_hdr->sh_info)
	{
	  sym = local_syms + r_symndx;
	  sec = local_sections[r_symndx];
	  sym_name = "<local symbol>";

	  relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
	  addend = rel->r_addend;
	}
      else
	{
	  h = sym_hashes[r_symndx - symtab_hdr->sh_info];
	  while (h->root.type == bfd_link_hash_indirect
		 || h->root.type == bfd_link_hash_warning)
	    h = (struct elf_link_hash_entry *) h->root.u.i.link;
	  sym_name = h->root.root.string;
	  if (h->root.type == bfd_link_hash_defined
	      || h->root.type == bfd_link_hash_defweak)
	    {
	      sec = h->root.u.def.section;
	      if (info->shared
		  && ((! info->symbolic && h->dynindx != -1)
		      || !h->def_regular)
		  && (input_section->flags & SEC_ALLOC) != 0
		  && (r_type == R_I370_ADDR31
		      || r_type == R_I370_COPY
		      || r_type == R_I370_ADDR16
		      || r_type == R_I370_RELATIVE))
		{
		  /* In these cases, we don't need the relocation
                     value.  We check specially because in some
                     obscure cases sec->output_section will be NULL.  */
		  relocation = 0;
		}
	      else
		relocation = (h->root.u.def.value
			      + sec->output_section->vma
			      + sec->output_offset);
	    }
	  else if (h->root.type == bfd_link_hash_undefweak)
	    relocation = 0;
	  else if (info->unresolved_syms_in_objects == RM_IGNORE
		   && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
	    relocation = 0;
	  else
	    {
	      if ((*info->callbacks->undefined_symbol)
		  (info, h->root.root.string, input_bfd,
		   input_section, rel->r_offset,
		   (info->unresolved_syms_in_objects == RM_GENERATE_ERROR
		    || ELF_ST_VISIBILITY (h->other))))
		{
		  ret = FALSE;
		  continue;
		}
	      relocation = 0;
	    }
	}

      switch ((int) r_type)
	{
	default:
	  (*_bfd_error_handler)
	    ("%B: unknown relocation type %d for symbol %s",
	     input_bfd, (int) r_type, sym_name);

	  bfd_set_error (bfd_error_bad_value);
	  ret = FALSE;
	  continue;

	case (int)R_I370_NONE:
	  continue;

	/* Relocations that may need to be propagated if this is a shared
           object.  */
	case (int)R_I370_REL31:
	  /* If these relocations are not to a named symbol, they can be
	     handled right here, no need to bother the dynamic linker.  */
	  if (h == NULL
	      || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
	    break;
	/* fall through */

	/* Relocations that always need to be propagated if this is a shared
           object.  */
	case (int)R_I370_ADDR31:
	case (int)R_I370_ADDR16:
	  if (info->shared
	      && r_symndx != 0)
	    {
	      Elf_Internal_Rela outrel;
	      bfd_byte *loc;
	      int skip;

#ifdef DEBUG
	      fprintf (stderr,
		       "i370_elf_relocate_section needs to create relocation for %s\n",
		       (h && h->root.root.string) ? h->root.root.string : "<unknown>");
#endif

	      /* When generating a shared object, these relocations
                 are copied into the output file to be resolved at run
                 time.  */

	      if (sreloc == NULL)
		{
		  const char *name;

		  name = (bfd_elf_string_from_elf_section
			  (input_bfd,
			   elf_elfheader (input_bfd)->e_shstrndx,
			   elf_section_data (input_section)->rel_hdr.sh_name));
		  if (name == NULL)
		    return FALSE;

		  BFD_ASSERT (strncmp (name, ".rela", 5) == 0
			      && strcmp (bfd_get_section_name (input_bfd,
							       input_section),
					 name + 5) == 0);

		  sreloc = bfd_get_section_by_name (dynobj, name);
		  BFD_ASSERT (sreloc != NULL);
		}

	      skip = 0;

	      outrel.r_offset =
		_bfd_elf_section_offset (output_bfd, info, input_section,
					 rel->r_offset);
	      if (outrel.r_offset == (bfd_vma) -1
		  || outrel.r_offset == (bfd_vma) -2)
		skip = (int) outrel.r_offset;
	      outrel.r_offset += (input_section->output_section->vma
				  + input_section->output_offset);

	      if (skip)
		memset (&outrel, 0, sizeof outrel);
	      /* h->dynindx may be -1 if this symbol was marked to
                 become local.  */
	      else if (h != NULL
		       && ((! info->symbolic && h->dynindx != -1)
			   || !h->def_regular))
		{
		  BFD_ASSERT (h->dynindx != -1);
		  outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
		  outrel.r_addend = rel->r_addend;
		}
	      else
		{
		  if (r_type == R_I370_ADDR31)
		    {
		      outrel.r_info = ELF32_R_INFO (0, R_I370_RELATIVE);
		      outrel.r_addend = relocation + rel->r_addend;
		    }
		  else
		    {
		      long indx;

		      if (bfd_is_abs_section (sec))
			indx = 0;
		      else if (sec == NULL || sec->owner == NULL)
			{
			  bfd_set_error (bfd_error_bad_value);
			  return FALSE;
			}
		      else
			{
			  asection *osec;

			  osec = sec->output_section;
			  indx = elf_section_data (osec)->dynindx;
			  BFD_ASSERT(indx > 0);
#ifdef DEBUG
			  if (indx <= 0)
			    {
			      printf ("indx=%d section=%s flags=%08x name=%s\n",
				      indx, osec->name, osec->flags,
				      h->root.root.string);
			    }
#endif
			}

		      outrel.r_info = ELF32_R_INFO (indx, r_type);
		      outrel.r_addend = relocation + rel->r_addend;
		    }
		}

	      loc = sreloc->contents;
	      loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
	      bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);

	      /* This reloc will be computed at runtime, so there's no
                 need to do anything now, unless this is a RELATIVE
                 reloc in an unallocated section.  */
	      if (skip == -1
		  || (input_section->flags & SEC_ALLOC) != 0
		  || ELF32_R_TYPE (outrel.r_info) != R_I370_RELATIVE)
		continue;
	    }
	  break;

	case (int)R_I370_COPY:
	case (int)R_I370_RELATIVE:
	  (*_bfd_error_handler)
	    ("%B: Relocation %s is not yet supported for symbol %s.",
	     input_bfd,
	     i370_elf_howto_table[(int) r_type]->name,
	     sym_name);

	  bfd_set_error (bfd_error_invalid_operation);
	  ret = FALSE;
	  continue;
	}

#ifdef DEBUG
      fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, offset = %ld, addend = %ld\n",
	       howto->name,
	       (int)r_type,
	       sym_name,
	       r_symndx,
	       (long)offset,
	       (long)addend);
#endif

      r = _bfd_final_link_relocate (howto,
				    input_bfd,
				    input_section,
				    contents,
				    offset,
				    relocation,
				    addend);

      if (r != bfd_reloc_ok)
	{
	  ret = FALSE;
	  switch (r)
	    {
	    default:
	      break;

	    case bfd_reloc_overflow:
	      {
		const char *name;

		if (h != NULL)
		  name = h->root.root.string;
		else
		  {
		    name = bfd_elf_string_from_elf_section (input_bfd,
							    symtab_hdr->sh_link,
							    sym->st_name);
		    if (name == NULL)
		      break;

		    if (*name == '\0')
		      name = bfd_section_name (input_bfd, sec);
		  }

		(*info->callbacks->reloc_overflow) (info,
						    name,
						    howto->name,
						    (bfd_vma) 0,
						    input_bfd,
						    input_section,
						    offset);
	      }
	      break;

	    }
	}
    }

#ifdef DEBUG
  fprintf (stderr, "\n");
#endif

  return ret;
}

static void
i370_elf_post_process_headers (abfd, link_info)
    bfd * abfd;
    struct bfd_link_info * link_info ATTRIBUTE_UNUSED;
{
  Elf_Internal_Ehdr * i_ehdrp;  /* Elf file header, internal form */

  i_ehdrp = elf_elfheader (abfd);
  i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_LINUX;
}

#define TARGET_BIG_SYM		bfd_elf32_i370_vec
#define TARGET_BIG_NAME		"elf32-i370"
#define ELF_ARCH		bfd_arch_i370
#define ELF_MACHINE_CODE	EM_S370
#ifdef EM_I370_OLD
#define ELF_MACHINE_ALT1	EM_I370_OLD
#endif
#define ELF_MAXPAGESIZE		0x1000
#define elf_info_to_howto	i370_elf_info_to_howto

#define elf_backend_plt_not_loaded 1
#define elf_backend_got_symbol_offset 4
#define elf_backend_rela_normal 1

#define bfd_elf32_bfd_reloc_type_lookup		i370_elf_reloc_type_lookup
#define bfd_elf32_bfd_set_private_flags		i370_elf_set_private_flags
#define bfd_elf32_bfd_merge_private_bfd_data	i370_elf_merge_private_bfd_data
#define elf_backend_relocate_section		i370_elf_relocate_section

/* dynamic loader support is mostly broken; just enough here to be able to
 * link glibc's ld.so without errors.
 */
#define elf_backend_create_dynamic_sections	i370_elf_create_dynamic_sections
#define elf_backend_size_dynamic_sections	i370_elf_size_dynamic_sections
#define elf_backend_finish_dynamic_sections	i370_elf_finish_dynamic_sections
#define elf_backend_fake_sections		i370_elf_fake_sections
#define elf_backend_section_from_shdr		i370_elf_section_from_shdr
#define elf_backend_adjust_dynamic_symbol	i370_elf_adjust_dynamic_symbol
#define elf_backend_check_relocs		i370_elf_check_relocs

/*
#define elf_backend_add_symbol_hook		i370_elf_add_symbol_hook
#define elf_backend_finish_dynamic_symbol	i370_elf_finish_dynamic_symbol
#define elf_backend_additional_program_headers	i370_elf_additional_program_headers
#define elf_backend_modify_segment_map		i370_elf_modify_segment_map
*/

#define elf_backend_post_process_headers	i370_elf_post_process_headers

static int i370_noop
  PARAMS ((void));

static int i370_noop ()
{
  return 1;
}

/* we need to define these at least as no-ops to link glibc ld.so */

#define elf_backend_add_symbol_hook \
  (bfd_boolean (*) \
     PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Sym *, \
	      const char **, flagword *, asection **, bfd_vma *))) i370_noop
#define elf_backend_finish_dynamic_symbol \
  (bfd_boolean (*) \
     PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, \
	      Elf_Internal_Sym *))) i370_noop
#define elf_backend_additional_program_headers \
  (int (*) PARAMS ((bfd *))) i370_noop
#define elf_backend_modify_segment_map \
  (bfd_boolean (*) PARAMS ((bfd *, struct bfd_link_info *))) i370_noop

#include "elf32-target.h"