aboutsummaryrefslogtreecommitdiff
path: root/bfd/elf32-ip2k.c
blob: 4cb28bb31b8b6c651fc40c8f249440e0cfe45fe5 (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
/* Ubicom IP2xxx specific support for 32-bit ELF
   Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc.

   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.  */

#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/ip2k.h"

/* Struct used to pass miscellaneous paramaters which
   helps to avoid overly long parameter lists.  */
struct misc
{
  Elf_Internal_Shdr *  symtab_hdr;
  Elf_Internal_Rela *  irelbase;
  bfd_byte *           contents;
  Elf_Internal_Sym *   isymbuf;
};

struct ip2k_opcode
{
  unsigned short opcode;
  unsigned short mask;
};
  
/* Prototypes.  */
static reloc_howto_type *ip2k_reloc_type_lookup
  PARAMS ((bfd *, bfd_reloc_code_real_type));
static int ip2k_is_opcode
  PARAMS ((bfd_byte *, const struct ip2k_opcode *));
static bfd_vma symbol_value
  PARAMS ((bfd *, Elf_Internal_Shdr *, Elf_Internal_Sym *,
	   Elf_Internal_Rela *));
static void ip2k_get_mem
  PARAMS ((bfd *, bfd_byte *, int, bfd_byte *));
static bfd_vma ip2k_nominal_page_bits
  PARAMS ((bfd *, asection *, bfd_vma, bfd_byte *));
static bfd_boolean ip2k_test_page_insn
  PARAMS ((bfd *, asection *, Elf_Internal_Rela *, struct misc *));
static bfd_boolean ip2k_delete_page_insn
  PARAMS ((bfd *, asection *, Elf_Internal_Rela *, bfd_boolean *, struct misc *));
static int ip2k_is_switch_table_128
  PARAMS ((bfd *, asection *, bfd_vma, bfd_byte *));
static bfd_boolean ip2k_relax_switch_table_128
  PARAMS ((bfd *, asection *, Elf_Internal_Rela *, bfd_boolean *, struct misc *));
static int ip2k_is_switch_table_256
  PARAMS ((bfd *, asection *, bfd_vma, bfd_byte *));
static bfd_boolean ip2k_relax_switch_table_256
  PARAMS ((bfd *, asection *, Elf_Internal_Rela *, bfd_boolean *, struct misc *));
static bfd_boolean ip2k_elf_relax_section
  PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *));
static bfd_boolean ip2k_elf_relax_section_page
  PARAMS ((bfd *, asection *, bfd_boolean *, struct misc *, unsigned long, unsigned long));
static void adjust_all_relocations
  PARAMS ((bfd *, asection *, bfd_vma, bfd_vma, int, int));
static bfd_boolean ip2k_elf_relax_delete_bytes
  PARAMS ((bfd *, asection *, bfd_vma, int));
static void ip2k_info_to_howto_rela
  PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
static bfd_reloc_status_type ip2k_final_link_relocate
  PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
	   Elf_Internal_Rela *, bfd_vma));
static bfd_boolean ip2k_elf_relocate_section
  PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
	   Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
static asection *ip2k_elf_gc_mark_hook
  PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
	   struct elf_link_hash_entry *, Elf_Internal_Sym *));
static bfd_boolean ip2k_elf_gc_sweep_hook
  PARAMS ((bfd *, struct bfd_link_info *, asection *,
	   const Elf_Internal_Rela *));

static bfd_boolean ip2k_relaxed = FALSE;

static const struct ip2k_opcode ip2k_page_opcode[] =
{
  {0x0010, 0xFFF8},	/* page */
  {0x0000, 0x0000},
};

#define IS_PAGE_OPCODE(code) \
  ip2k_is_opcode (code, ip2k_page_opcode)

static const struct ip2k_opcode ip2k_jmp_opcode[] =
{
  {0xE000, 0xE000},	/* jmp */
  {0x0000, 0x0000},
};

#define IS_JMP_OPCODE(code) \
  ip2k_is_opcode (code, ip2k_jmp_opcode)

static const struct ip2k_opcode ip2k_call_opcode[] =
{
  {0xC000, 0xE000},	/* call */
  {0x0000, 0x0000},
};

#define IS_CALL_OPCODE(code) \
  ip2k_is_opcode (code, ip2k_call_opcode)

static const struct ip2k_opcode ip2k_snc_opcode[] =
{
  {0xA00B, 0xFFFF},	/* snc */
  {0x0000, 0x0000},
};

#define IS_SNC_OPCODE(code) \
  ip2k_is_opcode (code, ip2k_snc_opcode)

static const struct ip2k_opcode ip2k_inc_1sp_opcode[] =
{
  {0x2B81, 0xFFFF},	/* inc 1(SP) */
  {0x0000, 0x0000},
};

#define IS_INC_1SP_OPCODE(code) \
  ip2k_is_opcode (code, ip2k_inc_1sp_opcode)

static const struct ip2k_opcode ip2k_add_2sp_w_opcode[] =
{
  {0x1F82, 0xFFFF},	/* add 2(SP),w */
  {0x0000, 0x0000},
};

#define IS_ADD_2SP_W_OPCODE(code) \
  ip2k_is_opcode (code, ip2k_add_2sp_w_opcode)

static const struct ip2k_opcode ip2k_add_w_wreg_opcode[] =
{
  {0x1C0A, 0xFFFF},	/* add w,wreg */
  {0x1E0A, 0xFFFF},	/* add wreg,w */
  {0x0000, 0x0000},
};

#define IS_ADD_W_WREG_OPCODE(code) \
  ip2k_is_opcode (code, ip2k_add_w_wreg_opcode)

static const struct ip2k_opcode ip2k_add_pcl_w_opcode[] =
{
  {0x1E09, 0xFFFF},	/* add pcl,w */
  {0x0000, 0x0000},
};

#define IS_ADD_PCL_W_OPCODE(code) \
  ip2k_is_opcode (code, ip2k_add_pcl_w_opcode)

static const struct ip2k_opcode ip2k_skip_opcodes[] =
{
  {0xB000, 0xF000},	/* sb */
  {0xA000, 0xF000},	/* snb */
  {0x7600, 0xFE00},	/* cse/csne #lit */
  {0x5800, 0xFC00},	/* incsnz */
  {0x4C00, 0xFC00},	/* decsnz */
  {0x4000, 0xFC00},	/* cse/csne */
  {0x3C00, 0xFC00},	/* incsz */
  {0x2C00, 0xFC00},	/* decsz */
  {0x0000, 0x0000},
};

#define IS_SKIP_OPCODE(code) \
  ip2k_is_opcode (code, ip2k_skip_opcodes)

/* Relocation tables.  */
static reloc_howto_type ip2k_elf_howto_table [] =
{
#define IP2K_HOWTO(t,rs,s,bs,pr,bp,name,sm,dm) \
    HOWTO(t,                    /* type */ \
          rs,                   /* rightshift */ \
          s,                    /* size (0 = byte, 1 = short, 2 = long) */ \
          bs,                   /* bitsize */ \
          pr,                   /* pc_relative */ \
          bp,                   /* bitpos */ \
          complain_overflow_dont,/* complain_on_overflow */ \
          bfd_elf_generic_reloc,/* special_function */ \
          name,                 /* name */ \
          FALSE,                /* partial_inplace */ \
          sm,                   /* src_mask */ \
          dm,                   /* dst_mask */ \
          pr)                   /* pcrel_offset */

  /* This reloc does nothing.  */
  IP2K_HOWTO (R_IP2K_NONE, 0,2,32, FALSE, 0, "R_IP2K_NONE", 0, 0),
  /* A 16 bit absolute relocation.  */
  IP2K_HOWTO (R_IP2K_16, 0,1,16, FALSE, 0, "R_IP2K_16", 0, 0xffff),
  /* A 32 bit absolute relocation.  */
  IP2K_HOWTO (R_IP2K_32, 0,2,32, FALSE, 0, "R_IP2K_32", 0, 0xffffffff),
  /* A 8-bit data relocation for the FR9 field.  Ninth bit is computed specially.  */
  IP2K_HOWTO (R_IP2K_FR9, 0,1,9, FALSE, 0, "R_IP2K_FR9", 0, 0x00ff),
  /* A 4-bit data relocation.  */
  IP2K_HOWTO (R_IP2K_BANK, 8,1,4, FALSE, 0, "R_IP2K_BANK", 0, 0x000f),
  /* A 13-bit insn relocation - word address => right-shift 1 bit extra.  */
  IP2K_HOWTO (R_IP2K_ADDR16CJP, 1,1,13, FALSE, 0, "R_IP2K_ADDR16CJP", 0, 0x1fff),
  /* A 3-bit insn relocation - word address => right-shift 1 bit extra.  */
  IP2K_HOWTO (R_IP2K_PAGE3, 14,1,3, FALSE, 0, "R_IP2K_PAGE3", 0, 0x0007),
  /* Two 8-bit data relocations.  */
  IP2K_HOWTO (R_IP2K_LO8DATA, 0,1,8, FALSE, 0, "R_IP2K_LO8DATA", 0, 0x00ff),
  IP2K_HOWTO (R_IP2K_HI8DATA, 8,1,8, FALSE, 0, "R_IP2K_HI8DATA", 0, 0x00ff),
  /* Two 8-bit insn relocations.  word address => right-shift 1 bit extra.  */
  IP2K_HOWTO (R_IP2K_LO8INSN, 1,1,8, FALSE, 0, "R_IP2K_LO8INSN", 0, 0x00ff),
  IP2K_HOWTO (R_IP2K_HI8INSN, 9,1,8, FALSE, 0, "R_IP2K_HI8INSN", 0, 0x00ff),

  /* Special 1 bit relocation for SKIP instructions.  */
  IP2K_HOWTO (R_IP2K_PC_SKIP, 1,1,1, FALSE, 12, "R_IP2K_PC_SKIP", 0xfffe, 0x1000),
  /* 16 bit word address.  */
  IP2K_HOWTO (R_IP2K_TEXT, 1,1,16, FALSE, 0, "R_IP2K_TEXT", 0, 0xffff),
  /* A 7-bit offset relocation for the FR9 field.  Eigth and ninth bit comes from insn.  */
  IP2K_HOWTO (R_IP2K_FR_OFFSET, 0,1,9, FALSE, 0, "R_IP2K_FR_OFFSET", 0x180, 0x007f),
  /* Bits 23:16 of an address.  */
  IP2K_HOWTO (R_IP2K_EX8DATA, 16,1,8, FALSE, 0, "R_IP2K_EX8DATA", 0, 0x00ff),
};


/* Map BFD reloc types to IP2K ELF reloc types.  */
static reloc_howto_type *
ip2k_reloc_type_lookup (abfd, code)
     bfd * abfd ATTRIBUTE_UNUSED;
     bfd_reloc_code_real_type code;
{
  /* Note that the ip2k_elf_howto_table is indxed by the R_
     constants.  Thus, the order that the howto records appear in the
     table *must* match the order of the relocation types defined in
     include/elf/ip2k.h.  */

  switch (code)
    {
    case BFD_RELOC_NONE:
      return &ip2k_elf_howto_table[ (int) R_IP2K_NONE];
    case BFD_RELOC_16:
      return &ip2k_elf_howto_table[ (int) R_IP2K_16];
    case BFD_RELOC_32:
      return &ip2k_elf_howto_table[ (int) R_IP2K_32];
    case BFD_RELOC_IP2K_FR9:
      return &ip2k_elf_howto_table[ (int) R_IP2K_FR9];
    case BFD_RELOC_IP2K_BANK:
      return &ip2k_elf_howto_table[ (int) R_IP2K_BANK];
    case BFD_RELOC_IP2K_ADDR16CJP:
      return &ip2k_elf_howto_table[ (int) R_IP2K_ADDR16CJP];
    case BFD_RELOC_IP2K_PAGE3:
      return &ip2k_elf_howto_table[ (int) R_IP2K_PAGE3];
    case BFD_RELOC_IP2K_LO8DATA:
      return &ip2k_elf_howto_table[ (int) R_IP2K_LO8DATA];
    case BFD_RELOC_IP2K_HI8DATA:
      return &ip2k_elf_howto_table[ (int) R_IP2K_HI8DATA];
    case BFD_RELOC_IP2K_LO8INSN:
      return &ip2k_elf_howto_table[ (int) R_IP2K_LO8INSN];
    case BFD_RELOC_IP2K_HI8INSN:
      return &ip2k_elf_howto_table[ (int) R_IP2K_HI8INSN];
    case BFD_RELOC_IP2K_PC_SKIP:
      return &ip2k_elf_howto_table[ (int) R_IP2K_PC_SKIP];
    case BFD_RELOC_IP2K_TEXT:
      return &ip2k_elf_howto_table[ (int) R_IP2K_TEXT];
    case BFD_RELOC_IP2K_FR_OFFSET:
      return &ip2k_elf_howto_table[ (int) R_IP2K_FR_OFFSET];
    case BFD_RELOC_IP2K_EX8DATA:
      return &ip2k_elf_howto_table[ (int) R_IP2K_EX8DATA];
    default:
      /* Pacify gcc -Wall.  */
      return NULL;
    }
  return NULL;
}

static void
ip2k_get_mem (abfd, addr, length, ptr)
     bfd *abfd ATTRIBUTE_UNUSED;
     bfd_byte *addr;
     int length;
     bfd_byte *ptr;
{
  while (length --)
    * ptr ++ = bfd_get_8 (abfd, addr ++);
}

static bfd_boolean
ip2k_is_opcode (code, opcodes)
     bfd_byte *code;
     const struct ip2k_opcode *opcodes;
{
  unsigned short insn = (code[0] << 8) | code[1];

  while (opcodes->mask != 0)
    {
      if ((insn & opcodes->mask) == opcodes->opcode)
	return TRUE;

      opcodes ++;
    }

  return FALSE;
}

#define PAGENO(ABSADDR) ((ABSADDR) & 0xFFFFC000)
#define BASEADDR(SEC)	((SEC)->output_section->vma + (SEC)->output_offset)

#define UNDEFINED_SYMBOL (~(bfd_vma)0)

/* Return the value of the symbol associated with the relocation IREL.  */

static bfd_vma
symbol_value (abfd, symtab_hdr, isymbuf, irel)
     bfd *abfd;
     Elf_Internal_Shdr *symtab_hdr;
     Elf_Internal_Sym *isymbuf;
     Elf_Internal_Rela *irel;
{
  if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
    {
      Elf_Internal_Sym *isym;
      asection *sym_sec;

      isym = isymbuf + ELF32_R_SYM (irel->r_info);
      if (isym->st_shndx == SHN_UNDEF)
	sym_sec = bfd_und_section_ptr;
      else if (isym->st_shndx == SHN_ABS)
	sym_sec = bfd_abs_section_ptr;
      else if (isym->st_shndx == SHN_COMMON)
	sym_sec = bfd_com_section_ptr;
      else
	sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);

      return isym->st_value + BASEADDR (sym_sec);
    }
  else
    {
      unsigned long indx;
      struct elf_link_hash_entry *h;

      indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
      h = elf_sym_hashes (abfd)[indx];
      BFD_ASSERT (h != NULL);

      if (h->root.type != bfd_link_hash_defined
	  && h->root.type != bfd_link_hash_defweak)
	return UNDEFINED_SYMBOL;

      return (h->root.u.def.value + BASEADDR (h->root.u.def.section));
    }
}

/* Returns the expected page state for the given instruction not including
   the effect of page instructions.  */

static bfd_vma
ip2k_nominal_page_bits (abfd, sec, addr, contents)
     bfd *abfd ATTRIBUTE_UNUSED;
     asection *sec;
     bfd_vma addr;
     bfd_byte *contents;
{
  bfd_vma page = PAGENO (BASEADDR (sec) + addr);

  /* Check if section flows into this page. If not then the page
     bits are assumed to match the PC. This will be true unless
     the user has a page instruction without a call/jump, in which
     case they are on their own.  */
  if (PAGENO (BASEADDR (sec)) == page)
    return page;

  /* Section flows across page boundary. The page bits should match
     the PC unless there is a possible flow from the previous page,
     in which case it is not possible to determine the value of the
     page bits.  */
  while (PAGENO (BASEADDR (sec) + addr - 2) == page)
    {
      bfd_byte code[2];

      addr -= 2;
      ip2k_get_mem (abfd, contents + addr, 2, code);
      if (!IS_PAGE_OPCODE (code))
	continue;

      /* Found a page instruction, check if jump table.  */
      if (ip2k_is_switch_table_128 (abfd, sec, addr, contents) != -1)
	/* Jump table => page is conditional.  */
	continue;

      if (ip2k_is_switch_table_256 (abfd, sec, addr, contents) != -1)
	/* Jump table => page is conditional.  */
	continue;

      /* Found a page instruction, check if conditional.  */
      if (addr >= 2)
        {
	  ip2k_get_mem (abfd, contents + addr - 2, 2, code);
          if (IS_SKIP_OPCODE (code))
	    /* Page is conditional.  */
	    continue;
        }

      /* Unconditional page instruction => page bits should be correct.  */
      return page;
    }

  /* Flow from previous page => page bits are impossible to determine.  */
  return 0;
}

static bfd_boolean
ip2k_test_page_insn (abfd, sec, irel, misc)
     bfd *abfd ATTRIBUTE_UNUSED;
     asection *sec;
     Elf_Internal_Rela *irel;
     struct misc *misc;
{
  bfd_vma symval;

  /* Get the value of the symbol referred to by the reloc.  */
  symval = symbol_value (abfd, misc->symtab_hdr, misc->isymbuf, irel);
  if (symval == UNDEFINED_SYMBOL)
    /* This appears to be a reference to an undefined
       symbol.  Just ignore it--it will be caught by the
       regular reloc processing.  */
    return FALSE;

  /* Test if we can delete this page instruction.  */
  if (PAGENO (symval + irel->r_addend) !=
      ip2k_nominal_page_bits (abfd, sec, irel->r_offset, misc->contents))
    return FALSE;

  return TRUE;
}

static bfd_boolean
ip2k_delete_page_insn (abfd, sec, irel, again, misc)
     bfd *abfd ATTRIBUTE_UNUSED;
     asection *sec;
     Elf_Internal_Rela *irel;
     bfd_boolean *again;
     struct misc *misc;
{
  /* Note that we've changed the relocs, section contents, etc.  */
  elf_section_data (sec)->relocs = misc->irelbase;
  elf_section_data (sec)->this_hdr.contents = misc->contents;
  misc->symtab_hdr->contents = (bfd_byte *) misc->isymbuf;

  /* Fix the relocation's type.  */
  irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_IP2K_NONE);

  /* Delete the PAGE insn.  */
  if (!ip2k_elf_relax_delete_bytes (abfd, sec, irel->r_offset, 2))
    return FALSE;
	
  /* Modified => will need to iterate relaxation again.  */
  *again = TRUE;
  
  return TRUE;
}

/* Determine if the instruction sequence matches that for
   the prologue of a switch dispatch table with fewer than
   128 entries.

          sc
          page    $nnn0
          jmp     $nnn0
          add     w,wreg
          add     pcl,w
  addr=>
          page    $nnn1
          jmp     $nnn1
 	   page    $nnn2
 	   jmp     $nnn2
 	   ...
 	   page    $nnnN
 	   jmp     $nnnN

  After relaxation.
  	   sc
 	   page    $nnn0
  	   jmp     $nnn0
 	   add     pcl,w
  addr=>
  	   jmp     $nnn1
 	   jmp     $nnn2
 	   ...
          jmp     $nnnN  */

static int
ip2k_is_switch_table_128 (abfd, sec, addr, contents)
     bfd *abfd ATTRIBUTE_UNUSED;
     asection *sec;
     bfd_vma addr;
     bfd_byte *contents;
{
  bfd_byte code[4];
  int index = 0;
  
  /* Check current page-jmp.  */
  if (addr + 4 > sec->_cooked_size)
    return -1;

  ip2k_get_mem (abfd, contents + addr, 4, code);

  if ((! IS_PAGE_OPCODE (code + 0))
      || (! IS_JMP_OPCODE (code + 2)))
    return -1;
  
  /* Search back.  */
  while (1)
    {
      if (addr < 4)
	return -1;

      /* Check previous 2 instructions.  */
      ip2k_get_mem (abfd, contents + addr - 4, 4, code);
      if ((IS_ADD_W_WREG_OPCODE (code + 0))
	  && (IS_ADD_PCL_W_OPCODE (code + 2)))
	return index;

      if ((! IS_PAGE_OPCODE (code + 0))
	  || (! IS_JMP_OPCODE (code + 2)))
	return -1;

      index++;
      addr -= 4;
    }
}

static bfd_boolean
ip2k_relax_switch_table_128 (abfd, sec, irel, again, misc)
     bfd *abfd ATTRIBUTE_UNUSED;
     asection *sec;
     Elf_Internal_Rela *irel;
     bfd_boolean *again;
     struct misc *misc;
{
  Elf_Internal_Rela *irelend = misc->irelbase + sec->reloc_count;
  Elf_Internal_Rela *ireltest = irel;
  bfd_byte code[4];
  bfd_vma addr;
  
  /* Test all page instructions.  */
  addr = irel->r_offset;
  while (1)
    {
      if (addr + 4 > sec->_cooked_size)
	break;

      ip2k_get_mem (abfd, misc->contents + addr, 4, code);
      if ((! IS_PAGE_OPCODE (code + 0))
	  || (! IS_JMP_OPCODE (code + 2)))
	break;

      /* Validate relocation entry (every entry should have a matching
          relocation entry).  */
      if (ireltest >= irelend)
        {
	  _bfd_error_handler (_("ip2k relaxer: switch table without complete matching relocation information."));
          return FALSE;
        }

      if (ireltest->r_offset != addr)
        {
	  _bfd_error_handler (_("ip2k relaxer: switch table without complete matching relocation information."));
          return FALSE;
        }

      if (! ip2k_test_page_insn (abfd, sec, ireltest, misc))
	/* Un-removable page insn => nothing can be done.  */
	return TRUE;

      addr += 4;
      ireltest += 2;
    }

  /* Relaxable. Adjust table header.  */
  ip2k_get_mem (abfd, misc->contents + irel->r_offset - 4, 4, code);
  if ((! IS_ADD_W_WREG_OPCODE (code + 0))
      || (! IS_ADD_PCL_W_OPCODE (code + 2)))
    {
      _bfd_error_handler (_("ip2k relaxer: switch table header corrupt."));
      return FALSE;
    }

  if (!ip2k_elf_relax_delete_bytes (abfd, sec, irel->r_offset - 4, 2))
    return FALSE;

  *again = TRUE;

  /* Delete all page instructions in table.  */
  while (irel < ireltest)
    {
      if (!ip2k_delete_page_insn (abfd, sec, irel, again, misc))
	return FALSE;
      irel += 2;
    }

  return TRUE;
}

/* Determine if the instruction sequence matches that for
   the prologue switch dispatch table with fewer than
   256 entries but more than 127.

   Before relaxation.
          push    %lo8insn(label) ; Push address of table
          push    %hi8insn(label)
          add     w,wreg          ; index*2 => offset
          snc                     ; CARRY SET?
          inc     1(sp)           ; Propagate MSB into table address
          add     2(sp),w         ; Add low bits of offset to table address
          snc                     ; and handle any carry-out
          inc     1(sp)
   addr=>
          page    __indjmp        ; Do an indirect jump to that location
          jmp     __indjmp
   label:                         ; case dispatch table starts here
 	   page    $nnn1
 	   jmp	   $nnn1
 	   page	   $nnn2
 	   jmp     $nnn2
 	   ...
 	   page    $nnnN
 	   jmp	   $nnnN

  After relaxation.
          push    %lo8insn(label) ; Push address of table
          push    %hi8insn(label)
          add     2(sp),w         ; Add low bits of offset to table address
          snc                     ; and handle any carry-out
          inc     1(sp)
  addr=>
          page    __indjmp        ; Do an indirect jump to that location
          jmp     __indjmp
   label:                         ; case dispatch table starts here
          jmp     $nnn1
          jmp     $nnn2
          ...
          jmp     $nnnN  */

static int
ip2k_is_switch_table_256 (abfd, sec, addr, contents)
     bfd *abfd ATTRIBUTE_UNUSED;
     asection *sec;
     bfd_vma addr;
     bfd_byte *contents;
{
  bfd_byte code[16];
  int index = 0;
  
  /* Check current page-jmp.  */
  if (addr + 4 > sec->_cooked_size)
    return -1;

  ip2k_get_mem (abfd, contents + addr, 4, code);
  if ((! IS_PAGE_OPCODE (code + 0))
      || (! IS_JMP_OPCODE (code + 2)))
    return -1;
  
  /* Search back.  */
  while (1)
    {
      if (addr < 16)
	return -1;

      /* Check previous 8 instructions.  */
      ip2k_get_mem (abfd, contents + addr - 16, 16, code);
      if ((IS_ADD_W_WREG_OPCODE (code + 0))
	  && (IS_SNC_OPCODE (code + 2))
	  && (IS_INC_1SP_OPCODE (code + 4))
	  && (IS_ADD_2SP_W_OPCODE (code + 6))
	  && (IS_SNC_OPCODE (code + 8))
	  && (IS_INC_1SP_OPCODE (code + 10))
	  && (IS_PAGE_OPCODE (code + 12))
	  && (IS_JMP_OPCODE (code + 14)))
	return index;

      if ((IS_ADD_W_WREG_OPCODE (code + 2))
	  && (IS_SNC_OPCODE (code + 4))
	  && (IS_INC_1SP_OPCODE (code + 6))
	  && (IS_ADD_2SP_W_OPCODE (code + 8))
	  && (IS_SNC_OPCODE (code + 10))
	  && (IS_INC_1SP_OPCODE (code + 12))
	  && (IS_JMP_OPCODE (code + 14)))
	return index;
      
      if ((! IS_PAGE_OPCODE (code + 0))
	  || (! IS_JMP_OPCODE (code + 2)))
	return -1;

      index++;
      addr -= 4;
    }
}

static bfd_boolean
ip2k_relax_switch_table_256 (abfd, sec, irel, again, misc)
     bfd *abfd ATTRIBUTE_UNUSED;
     asection *sec;
     Elf_Internal_Rela *irel;
     bfd_boolean *again;
     struct misc *misc;
{
  Elf_Internal_Rela *irelend = misc->irelbase + sec->reloc_count;
  Elf_Internal_Rela *ireltest = irel;
  bfd_byte code[12];
  bfd_vma addr;
  
  /* Test all page instructions.  */
  addr = irel->r_offset;

  while (1)
    {
      if (addr + 4 > sec->_cooked_size)
	break;

      ip2k_get_mem (abfd, misc->contents + addr, 4, code);

      if ((! IS_PAGE_OPCODE (code + 0))
	  || (! IS_JMP_OPCODE (code + 2)))
	break;

      /* Validate relocation entry (every entry should have a matching
          relocation entry).  */
      if (ireltest >= irelend)
        {
          _bfd_error_handler (_("ip2k relaxer: switch table without complete matching relocation information."));
          return FALSE;
        }

      if (ireltest->r_offset != addr)
        {
          _bfd_error_handler (_("ip2k relaxer: switch table without complete matching relocation information."));
          return FALSE;
        }

      if (!ip2k_test_page_insn (abfd, sec, ireltest, misc))
	/* Un-removable page insn => nothing can be done.  */
	return TRUE;

      addr += 4;
      ireltest += 2;
    }

  /* Relaxable. Adjust table header.  */
  ip2k_get_mem (abfd, misc->contents + irel->r_offset - 4, 2, code);
  if (IS_PAGE_OPCODE (code))
    addr = irel->r_offset - 16;
  else
    addr = irel->r_offset - 14;

  ip2k_get_mem (abfd, misc->contents + addr, 12, code);
  if ((!IS_ADD_W_WREG_OPCODE (code + 0))
      || (!IS_SNC_OPCODE (code + 2))
      || (!IS_INC_1SP_OPCODE (code + 4))
      || (!IS_ADD_2SP_W_OPCODE (code + 6))
      || (!IS_SNC_OPCODE (code + 8))
      || (!IS_INC_1SP_OPCODE (code + 10)))
    {
      _bfd_error_handler (_("ip2k relaxer: switch table header corrupt."));
      return FALSE;
    }

  /* Delete first 3 opcodes.  */
  if (!ip2k_elf_relax_delete_bytes (abfd, sec, addr + 0, 6))
    return FALSE;

  *again = TRUE;

  /* Delete all page instructions in table.  */
  while (irel < ireltest)
    {
      if (!ip2k_delete_page_insn (abfd, sec, irel, again, misc))
	return FALSE;
      irel += 2;
    }

  return TRUE;
}

/* This function handles relaxing for the ip2k.

   Principle: Start with the first page and remove page instructions that
   are not require on this first page. By removing page instructions more
   code will fit into this page - repeat until nothing more can be achieved
   for this page. Move on to the next page.

   Processing the pages one at a time from the lowest page allows a removal
   only policy to be used - pages can be removed but are never reinserted.  */

static bfd_boolean
ip2k_elf_relax_section (abfd, sec, link_info, again)
     bfd *abfd;
     asection *sec;
     struct bfd_link_info *link_info;
     bfd_boolean *again;
{
  Elf_Internal_Shdr *symtab_hdr;
  Elf_Internal_Rela *internal_relocs;
  bfd_byte *contents = NULL;
  Elf_Internal_Sym *isymbuf = NULL;
  static asection * first_section = NULL;
  static unsigned long search_addr;
  static unsigned long page_start = 0;
  static unsigned long page_end = 0;
  static unsigned int pass = 0;
  static bfd_boolean new_pass = FALSE;
  static bfd_boolean changed = FALSE;
  struct misc misc;
  asection *stab;

  /* Assume nothing changes.  */
  *again = FALSE;

  if (first_section == NULL)
    {
      ip2k_relaxed = TRUE;
      first_section = sec;
    }

  if (first_section == sec)
    {
      pass++;
      new_pass = TRUE;
    }

  /* We don't have to do anything for a relocatable link,
     if this section does not have relocs, or if this is
     not a code section.  */
  if (link_info->relocatable
      || (sec->flags & SEC_RELOC) == 0
      || sec->reloc_count == 0
      || (sec->flags & SEC_CODE) == 0)
    return TRUE;

  /* If this is the first time we have been called
      for this section, initialise the cooked size.  */
  if (sec->_cooked_size == 0)
    sec->_cooked_size = sec->_raw_size;

  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;

  internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL,
					       (Elf_Internal_Rela *)NULL,
					       link_info->keep_memory);
  if (internal_relocs == NULL)
    goto error_return;

  /* Make sure the stac.rela stuff gets read in.  */
  stab = bfd_get_section_by_name (abfd, ".stab");

  if (stab)
    {
      /* So stab does exits.  */
      Elf_Internal_Rela * irelbase;

      irelbase = _bfd_elf_link_read_relocs (abfd, stab, NULL,
					    (Elf_Internal_Rela *)NULL,
					    link_info->keep_memory);
    }

  /* Get section contents cached copy if it exists.  */
  if (contents == NULL)
    {
      /* Get cached copy if it exists.  */
      if (elf_section_data (sec)->this_hdr.contents != NULL)
	contents = elf_section_data (sec)->this_hdr.contents;
      else
	{
	  /* Go get them off disk.  */
	  contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
	  if (contents == NULL)
	    goto error_return;

	  if (! bfd_get_section_contents (abfd, sec, contents,
					  (file_ptr) 0, sec->_raw_size))
	    goto error_return;
	}
    }

  /* Read this BFD's symbols cached copy if it exists.  */
  if (isymbuf == NULL && symtab_hdr->sh_info != 0)
    {
      isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
      if (isymbuf == NULL)
	isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
					symtab_hdr->sh_info, 0,
					NULL, NULL, NULL);
      if (isymbuf == NULL)
	goto error_return;
    }

  misc.symtab_hdr = symtab_hdr;
  misc.isymbuf = isymbuf;
  misc.irelbase = internal_relocs;
  misc.contents = contents;

  /* This is where all the relaxation actually get done.  */
  if ((pass == 1) || (new_pass && !changed))
    {
      /* On the first pass we simply search for the lowest page that
         we havn't relaxed yet. Note that the pass count is reset
         each time a page is complete in order to move on to the next page.
         If we can't find any more pages then we are finished.  */
      if (new_pass)
	{
	  pass = 1;
	  new_pass = FALSE;
	  changed = TRUE; /* Pre-initialize to break out of pass 1.  */
	  search_addr = 0xFFFFFFFF;
	}

      if ((BASEADDR (sec) + sec->_cooked_size < search_addr)
	  && (BASEADDR (sec) + sec->_cooked_size > page_end))
	{
	  if (BASEADDR (sec) <= page_end)
	    search_addr = page_end + 1;
	  else
	    search_addr = BASEADDR (sec);

	  /* Found a page => more work to do.  */
	  *again = TRUE;
	}
    }
  else
    {
      if (new_pass)
	{
	  new_pass = FALSE;
	  changed = FALSE;
	  page_start = PAGENO (search_addr);
	  page_end = page_start | 0x00003FFF;
	}

      /* Only process sections in range.  */
      if ((BASEADDR (sec) + sec->_cooked_size >= page_start)
	  && (BASEADDR (sec) <= page_end))
	{
          if (!ip2k_elf_relax_section_page (abfd, sec, &changed, &misc, page_start, page_end))
	    return FALSE;
	}
      *again = TRUE;
    }

  /* Perform some house keeping after relaxing the section.  */

  if (isymbuf != NULL
      && symtab_hdr->contents != (unsigned char *) isymbuf)
    {
      if (! link_info->keep_memory)
	free (isymbuf);
      else
	symtab_hdr->contents = (unsigned char *) isymbuf;
    }

  if (contents != NULL
      && elf_section_data (sec)->this_hdr.contents != contents)
    {
      if (! link_info->keep_memory)
	free (contents);
      else
	{
	  /* Cache the section contents for elf_link_input_bfd.  */
	  elf_section_data (sec)->this_hdr.contents = contents;
	}
    }

  if (internal_relocs != NULL
      && elf_section_data (sec)->relocs != internal_relocs)
    free (internal_relocs);

  return TRUE;

 error_return:
  if (isymbuf != NULL
      && symtab_hdr->contents != (unsigned char *) isymbuf)
    free (isymbuf);
  if (contents != NULL
      && elf_section_data (sec)->this_hdr.contents != contents)
    free (contents);
  if (internal_relocs != NULL
      && elf_section_data (sec)->relocs != internal_relocs)
    free (internal_relocs);
  return FALSE;
}

/* This function handles relaxation of a section in a specific page.  */

static bfd_boolean
ip2k_elf_relax_section_page (abfd, sec, again, misc, page_start, page_end)
     bfd *abfd;
     asection *sec;
     bfd_boolean *again;
     struct misc *misc;
     unsigned long page_start;
     unsigned long page_end;
{
  Elf_Internal_Rela *irelend = misc->irelbase + sec->reloc_count;
  Elf_Internal_Rela *irel;
  int switch_table_128;
  int switch_table_256;
  
  /* Walk thru the section looking for relaxation opertunities.  */
  for (irel = misc->irelbase; irel < irelend; irel++)
    {
      if (ELF32_R_TYPE (irel->r_info) != (int) R_IP2K_PAGE3)
	/* Ignore non page instructions.  */
	continue;

      if (BASEADDR (sec) + irel->r_offset < page_start)
	/* Ignore page instructions on earlier page - they have
	   already been processed. Remember that there is code flow
	   that crosses a page boundary.  */
	continue;

      if (BASEADDR (sec) + irel->r_offset > page_end)
	/* Flow beyond end of page => nothing more to do for this page.  */
	return TRUE;

      /* Detect switch tables.  */
      switch_table_128 = ip2k_is_switch_table_128 (abfd, sec, irel->r_offset, misc->contents);
      switch_table_256 = ip2k_is_switch_table_256 (abfd, sec, irel->r_offset, misc->contents);

      if ((switch_table_128 > 0) || (switch_table_256 > 0))
	/* If the index is greater than 0 then it has already been processed.  */
	continue;

      if (switch_table_128 == 0)
	{
	  if (!ip2k_relax_switch_table_128 (abfd, sec, irel, again, misc))
	    return FALSE;

	  continue;
	}

      if (switch_table_256 == 0)
	{
	  if (!ip2k_relax_switch_table_256 (abfd, sec, irel, again, misc))
	    return FALSE;

	  continue;
	}

      /* Simple relax.  */
      if (ip2k_test_page_insn (abfd, sec, irel, misc))
	{
	  if (!ip2k_delete_page_insn (abfd, sec, irel, again, misc))
	    return FALSE;

	  continue;
	}
    }

  return TRUE;
}

/* Parts of a Stabs entry.  */

#define STRDXOFF  (0)
#define TYPEOFF   (4)
#define OTHEROFF  (5)
#define DESCOFF   (6)
#define VALOFF    (8)
#define STABSIZE  (12)

/* Adjust all the relocations entries after adding or inserting instructions.  */

static void
adjust_all_relocations (abfd, sec, addr, endaddr, count, noadj)
     bfd *abfd;
     asection *sec;
     bfd_vma addr;
     bfd_vma endaddr;
     int count;
     int noadj;
{
  Elf_Internal_Shdr *symtab_hdr;
  Elf_Internal_Sym *isymbuf, *isym, *isymend;
  unsigned int shndx;
  bfd_byte *contents;
  Elf_Internal_Rela *irel, *irelend, *irelbase;
  struct elf_link_hash_entry **sym_hashes;
  struct elf_link_hash_entry **end_hashes;
  unsigned int symcount;
  asection *stab;

  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
  isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;

  shndx = _bfd_elf_section_from_bfd_section (abfd, sec);

  contents = elf_section_data (sec)->this_hdr.contents;

  irelbase = elf_section_data (sec)->relocs;
  irelend = irelbase + sec->reloc_count;

  for (irel = irelbase; irel < irelend; irel++)
    {
      if (ELF32_R_TYPE (irel->r_info) != R_IP2K_NONE)
        {
          /* Get the value of the symbol referred to by the reloc.  */
          if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
            {
              asection *sym_sec;

              /* A local symbol.  */
	      isym = isymbuf + ELF32_R_SYM (irel->r_info);
              sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);

              if (isym->st_shndx == shndx)
                {
                  bfd_vma baseaddr = BASEADDR (sec);
                  bfd_vma symval = BASEADDR (sym_sec) + isym->st_value
                                   + irel->r_addend;

                  if ((baseaddr + addr + noadj) <= symval
                      && symval < (baseaddr + endaddr))
                    irel->r_addend += count;
                }
            }
        }

      /* Do this only for PC space relocations.  */
      if (addr <= irel->r_offset && irel->r_offset < endaddr)
        irel->r_offset += count;
    }

  /* Now fix the stab relocations.  */
  stab = bfd_get_section_by_name (abfd, ".stab");
  if (stab)
    {
      bfd_byte *stabcontents, *stabend, *stabp;

      irelbase = elf_section_data (stab)->relocs;
      irelend = irelbase + stab->reloc_count;

      /* Pull out the contents of the stab section.  */
      if (elf_section_data (stab)->this_hdr.contents != NULL)
	stabcontents = elf_section_data (stab)->this_hdr.contents;
      else
	{
	  stabcontents = (bfd_byte *) bfd_alloc (abfd, stab->_raw_size);
	  if (stabcontents == NULL)
	    return;

	  if (! bfd_get_section_contents (abfd, stab, stabcontents,
					  (file_ptr) 0, stab->_raw_size))
	    return;

	  /* We need to remember this.  */
	  elf_section_data (stab)->this_hdr.contents = stabcontents;
	}

      stabend = stabcontents + stab->_raw_size;

      for (irel = irelbase; irel < irelend; irel++)
	{
	  if (ELF32_R_TYPE (irel->r_info) != R_IP2K_NONE)
	    {
	      /* Get the value of the symbol referred to by the reloc.  */
	      if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
		{
		  asection *sym_sec;
		  
		  /* A local symbol.  */
		  isym = isymbuf + ELF32_R_SYM (irel->r_info);
		  sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
		  
		  if (sym_sec == sec)
		    {
		      const char *name;
		      unsigned long strx;
		      unsigned char type, other;
		      unsigned short desc;
		      bfd_vma value;
		      bfd_vma baseaddr = BASEADDR (sec);
		      bfd_vma symval = BASEADDR (sym_sec) + isym->st_value
			+ irel->r_addend;
		      
		      if ((baseaddr + addr) <= symval
			  && symval <= (baseaddr + endaddr))
			irel->r_addend += count;

		      /* Go hunt up a function and fix its line info if needed.  */
		      stabp = stabcontents + irel->r_offset - 8; 

		      /* Go pullout the stab entry.  */
		      strx  = bfd_h_get_32 (abfd, stabp + STRDXOFF);
		      type  = bfd_h_get_8 (abfd, stabp + TYPEOFF);
		      other = bfd_h_get_8 (abfd, stabp + OTHEROFF);
		      desc  = bfd_h_get_16 (abfd, stabp + DESCOFF);
		      value = bfd_h_get_32 (abfd, stabp + VALOFF);
		      
		      name = bfd_get_stab_name (type);
		      
		      if (strcmp (name, "FUN") == 0)
			{
			  int function_adjusted = 0;

			  if (symval > (baseaddr + addr))
			    /* Not in this function.  */
			    continue;

			  /* Hey we got a function hit.  */
			  stabp += STABSIZE;
			  for (;stabp < stabend; stabp += STABSIZE)
			    {
			      /* Go pullout the stab entry.  */
			      strx  = bfd_h_get_32 (abfd, stabp + STRDXOFF);
			      type  = bfd_h_get_8 (abfd, stabp + TYPEOFF);
			      other = bfd_h_get_8 (abfd, stabp + OTHEROFF);
			      desc  = bfd_h_get_16 (abfd, stabp + DESCOFF);
			      value = bfd_h_get_32 (abfd, stabp + VALOFF);

			      name = bfd_get_stab_name (type);

			      if (strcmp (name, "FUN") == 0)
				{
				  /* Hit another function entry.  */
				  if (function_adjusted)
				    {
				      /* Adjust the value.  */
				      value += count;
				  
				      /* We need to put it back.  */
				      bfd_h_put_32 (abfd, value,stabp + VALOFF);
				    }

				  /* And then bale out.  */
				  break;
				}

			      if (strcmp (name, "SLINE") == 0)
				{
				  /* Got a line entry.  */
				  if ((baseaddr + addr) <= (symval + value))
				    {
				      /* Adjust the line entry.  */
				      value += count;

				      /* We need to put it back.  */
				      bfd_h_put_32 (abfd, value,stabp + VALOFF);
				      function_adjusted = 1;
				    }
				}
			    }
			}
		    }
		}
	    }
	}
    }

  /* When adding an instruction back it is sometimes necessary to move any
     global or local symbol that was referencing the first instruction of
     the moved block to refer to the first instruction of the inserted block.

     For example adding a PAGE instruction before a CALL or JMP requires
     that any label on the CALL or JMP is moved to the PAGE insn.  */
  addr += noadj;

  /* Adjust the local symbols defined in this section.  */
  isymend = isymbuf + symtab_hdr->sh_info;
  for (isym = isymbuf; isym < isymend; isym++)
    {
      if (isym->st_shndx == shndx
	  && addr <= isym->st_value
	  && isym->st_value < endaddr)
	isym->st_value += count;
    }

    /* Now adjust the global symbols defined in this section.  */
  symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
	      - symtab_hdr->sh_info);
  sym_hashes = elf_sym_hashes (abfd);
  end_hashes = sym_hashes + symcount;
  for (; sym_hashes < end_hashes; sym_hashes++)
    {
      struct elf_link_hash_entry *sym_hash = *sym_hashes;

      if ((sym_hash->root.type == bfd_link_hash_defined
	   || sym_hash->root.type == bfd_link_hash_defweak)
	  && sym_hash->root.u.def.section == sec)
	{
          if (addr <= sym_hash->root.u.def.value
              && sym_hash->root.u.def.value < endaddr)
	    sym_hash->root.u.def.value += count;
	}
    }

  return;
}

/* Delete some bytes from a section while relaxing.  */

static bfd_boolean
ip2k_elf_relax_delete_bytes (abfd, sec, addr, count)
     bfd *abfd;
     asection *sec;
     bfd_vma addr;
     int count;
{
  bfd_byte *contents = elf_section_data (sec)->this_hdr.contents;
  bfd_vma endaddr = sec->_cooked_size;

  /* Actually delete the bytes.  */
  memmove (contents + addr, contents + addr + count,
	   endaddr - addr - count);

  sec->_cooked_size -= count;

  adjust_all_relocations (abfd, sec, addr + count, endaddr, -count, 0);
  return TRUE;
}

/* -------------------------------------------------------------------- */

/* XXX: The following code is the result of a cut&paste.  This unfortunate
   practice is very widespread in the various target back-end files.  */

/* Set the howto pointer for a IP2K ELF reloc.  */

static void
ip2k_info_to_howto_rela (abfd, cache_ptr, dst)
     bfd * abfd ATTRIBUTE_UNUSED;
     arelent * cache_ptr;
     Elf_Internal_Rela * dst;
{
  unsigned int r_type;

  r_type = ELF32_R_TYPE (dst->r_info);
  switch (r_type)
    {
    default:
      cache_ptr->howto = & ip2k_elf_howto_table [r_type];
      break;
    }
}

/* Perform a single relocation.
   By default we use the standard BFD routines.  */

static bfd_reloc_status_type
ip2k_final_link_relocate (howto, input_bfd, input_section, contents, rel,
			  relocation)
     reloc_howto_type *  howto;
     bfd *               input_bfd;
     asection *          input_section;
     bfd_byte *          contents;
     Elf_Internal_Rela * rel;
     bfd_vma             relocation;
{
  static bfd_vma page_addr = 0;

  bfd_reloc_status_type r = bfd_reloc_ok;
  switch (howto->type)
    {
      /* Handle data space relocations.  */
    case R_IP2K_FR9:
    case R_IP2K_BANK:
      if ((relocation & IP2K_DATA_MASK) == IP2K_DATA_VALUE)
	relocation &= ~IP2K_DATA_MASK;
      else
	r = bfd_reloc_notsupported;
      break;

    case R_IP2K_LO8DATA:
    case R_IP2K_HI8DATA:
    case R_IP2K_EX8DATA:
      break;

      /* Handle insn space relocations.  */
    case R_IP2K_PAGE3:
      page_addr = BASEADDR (input_section) + rel->r_offset;
      if ((relocation & IP2K_INSN_MASK) == IP2K_INSN_VALUE)
	relocation &= ~IP2K_INSN_MASK;
      else
	r = bfd_reloc_notsupported;
      break;

    case R_IP2K_ADDR16CJP:
      if (BASEADDR (input_section) + rel->r_offset != page_addr + 2)
	{
	  /* No preceeding page instruction, verify that it isn't needed.  */
	  if (PAGENO (relocation + rel->r_addend) !=
	      ip2k_nominal_page_bits (input_bfd, input_section,
	      			      rel->r_offset, contents))
	    _bfd_error_handler (_("ip2k linker: missing page instruction at 0x%08lx (dest = 0x%08lx)."),
				BASEADDR (input_section) + rel->r_offset,
				relocation + rel->r_addend);
        }
      else if (ip2k_relaxed)
        {
          /* Preceeding page instruction. Verify that the page instruction is
             really needed. One reason for the relaxation to miss a page is if
             the section is not marked as executable.  */
	  if (!ip2k_is_switch_table_128 (input_bfd, input_section, rel->r_offset - 2, contents) &&
	      !ip2k_is_switch_table_256 (input_bfd, input_section, rel->r_offset - 2, contents) &&
	      (PAGENO (relocation + rel->r_addend) ==
	       ip2k_nominal_page_bits (input_bfd, input_section,
	      			      rel->r_offset - 2, contents)))
	    _bfd_error_handler (_("ip2k linker: redundant page instruction at 0x%08lx (dest = 0x%08lx)."),
				page_addr,
				relocation + rel->r_addend);
        }
      if ((relocation & IP2K_INSN_MASK) == IP2K_INSN_VALUE)
	relocation &= ~IP2K_INSN_MASK;
      else
	r = bfd_reloc_notsupported;
      break;

    case R_IP2K_LO8INSN:
    case R_IP2K_HI8INSN:
    case R_IP2K_PC_SKIP:
      if ((relocation & IP2K_INSN_MASK) == IP2K_INSN_VALUE)
	relocation &= ~IP2K_INSN_MASK;
      else
	r = bfd_reloc_notsupported;
      break;

    case R_IP2K_16:
      /* If this is a relocation involving a TEXT
	 symbol, reduce it to a word address.  */
      if ((relocation & IP2K_INSN_MASK) == IP2K_INSN_VALUE)
	howto = &ip2k_elf_howto_table[ (int) R_IP2K_TEXT];
      break;

      /* Pass others through.  */
    default:
      break;
    }

  /* Only install relocation if above tests did not disqualify it.  */
  if (r == bfd_reloc_ok)
    r = _bfd_final_link_relocate (howto, input_bfd, input_section,
				  contents, rel->r_offset,
				  relocation, rel->r_addend);

  return r;
}

/* Relocate a IP2K ELF section.

   The RELOCATE_SECTION function is called by the new 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 adjusting 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
ip2k_elf_relocate_section (output_bfd, info, input_bfd, input_section,
			   contents, relocs, local_syms, local_sections)
     bfd *output_bfd ATTRIBUTE_UNUSED;
     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;
  struct elf_link_hash_entry **sym_hashes;
  Elf_Internal_Rela *rel;
  Elf_Internal_Rela *relend;

  if (info->relocatable)
    return TRUE;

  symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
  sym_hashes = elf_sym_hashes (input_bfd);
  relend     = relocs + input_section->reloc_count;

  for (rel = relocs; rel < relend; rel ++)
    {
      reloc_howto_type *           howto;
      unsigned long                r_symndx;
      Elf_Internal_Sym *           sym;
      asection *                   sec;
      struct elf_link_hash_entry * h;
      bfd_vma                      relocation;
      bfd_reloc_status_type        r;
      const char *                 name = NULL;
      int                          r_type;

      /* This is a final link.  */
      r_type = ELF32_R_TYPE (rel->r_info);
      r_symndx = ELF32_R_SYM (rel->r_info);
      howto  = ip2k_elf_howto_table + ELF32_R_TYPE (rel->r_info);
      h      = NULL;
      sym    = NULL;
      sec    = NULL;

      if (r_symndx < symtab_hdr->sh_info)
	{
	  sym = local_syms + r_symndx;
	  sec = local_sections [r_symndx];
	  relocation = BASEADDR (sec) + sym->st_value;

	  name = bfd_elf_string_from_elf_section
	    (input_bfd, symtab_hdr->sh_link, sym->st_name);
	  name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
	}
      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;

	  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;
	      relocation = h->root.u.def.value + BASEADDR (sec);
	    }

	  else if (h->root.type == bfd_link_hash_undefweak)
	    relocation = 0;

	  else
	    {
	      if (! ((*info->callbacks->undefined_symbol)
		     (info, h->root.root.string, input_bfd,
		      input_section, rel->r_offset,
		     (! info->shared || info->no_undefined))))
		return FALSE;
	      relocation = 0;
	    }
	}

      /* Finally, the sole IP2K-specific part.  */
      r = ip2k_final_link_relocate (howto, input_bfd, input_section,
				     contents, rel, relocation);

      if (r != bfd_reloc_ok)
	{
	  const char * msg = (const char *) NULL;

	  switch (r)
	    {
	    case bfd_reloc_overflow:
	      r = info->callbacks->reloc_overflow
		(info, name, howto->name, (bfd_vma) 0,
		 input_bfd, input_section, rel->r_offset);
	      break;

	    case bfd_reloc_undefined:
	      r = info->callbacks->undefined_symbol
		(info, name, input_bfd, input_section, rel->r_offset, TRUE);
	      break;

	    case bfd_reloc_outofrange:
	      msg = _("internal error: out of range error");
	      break;

	      /* This is how ip2k_final_link_relocate tells us of a non-kosher
                 reference between insn & data address spaces.  */
	    case bfd_reloc_notsupported:
              if (sym != NULL) /* Only if it's not an unresolved symbol.  */
	         msg = _("unsupported relocation between data/insn address spaces");
	      break;

	    case bfd_reloc_dangerous:
	      msg = _("internal error: dangerous relocation");
	      break;

	    default:
	      msg = _("internal error: unknown error");
	      break;
	    }

	  if (msg)
	    r = info->callbacks->warning
	      (info, msg, name, input_bfd, input_section, rel->r_offset);

	  if (! r)
	    return FALSE;
	}
    }

  return TRUE;
}

static asection *
ip2k_elf_gc_mark_hook (sec, info, rel, h, sym)
     asection *sec;
     struct bfd_link_info *info ATTRIBUTE_UNUSED;
     Elf_Internal_Rela *rel;
     struct elf_link_hash_entry *h;
     Elf_Internal_Sym *sym;
{
  if (h != NULL)
    {
      switch (ELF32_R_TYPE (rel->r_info))
      {
#if 0
      case R_IP2K_GNU_VTINHERIT:
      case R_IP2K_GNU_VTENTRY:
        break;
#endif

      default:
        switch (h->root.type)
          {
          case bfd_link_hash_defined:
          case bfd_link_hash_defweak:
            return h->root.u.def.section;

          case bfd_link_hash_common:
            return h->root.u.c.p->section;

          default:
            break;
          }
       }
     }
   else
     {
       if (!(elf_bad_symtab (sec->owner)
	     && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
	   && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
		 && sym->st_shndx != SHN_COMMON))
	 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
      }
  return NULL;
}

static bfd_boolean
ip2k_elf_gc_sweep_hook (abfd, info, sec, relocs)
     bfd *abfd ATTRIBUTE_UNUSED;
     struct bfd_link_info *info ATTRIBUTE_UNUSED;
     asection *sec ATTRIBUTE_UNUSED;
     const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
{
  /* We don't use got and plt entries for ip2k.  */
  return TRUE;
}

#define TARGET_BIG_SYM	 bfd_elf32_ip2k_vec
#define TARGET_BIG_NAME  "elf32-ip2k"

#define ELF_ARCH	 bfd_arch_ip2k
#define ELF_MACHINE_CODE EM_IP2K
#define ELF_MACHINE_ALT1 EM_IP2K_OLD
#define ELF_MAXPAGESIZE  1 /* No pages on the IP2K.  */

#define elf_info_to_howto_rel			NULL
#define elf_info_to_howto			ip2k_info_to_howto_rela

#define elf_backend_can_gc_sections     	1
#define elf_backend_rela_normal			1
#define elf_backend_gc_mark_hook                ip2k_elf_gc_mark_hook
#define elf_backend_gc_sweep_hook               ip2k_elf_gc_sweep_hook
#define elf_backend_relocate_section		ip2k_elf_relocate_section

#define elf_symbol_leading_char			'_'
#define bfd_elf32_bfd_reloc_type_lookup		ip2k_reloc_type_lookup
#define bfd_elf32_bfd_relax_section		ip2k_elf_relax_section

#include "elf32-target.h"