summaryrefslogtreecommitdiff
path: root/bfd/elf-m10200.c
blob: cde5641d255387f760135fec4838bf45fb9192cf (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
/* Matsushita 10200 specific support for 32-bit ELF
   Copyright 1996, 1997, 1998, 1999, 2000, 2001
   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"

static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
  PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
static void mn10200_info_to_howto
  PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
static boolean mn10200_elf_relax_delete_bytes
  PARAMS ((bfd *, asection *, bfd_vma, int));
static boolean mn10200_elf_symbol_address_p
  PARAMS ((bfd *, asection *, Elf32_External_Sym *, bfd_vma));
static bfd_reloc_status_type mn10200_elf_final_link_relocate
  PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *,
	   bfd_byte *, bfd_vma, bfd_vma, bfd_vma,
	   struct bfd_link_info *, asection *, int));
static boolean mn10200_elf_relocate_section
PARAMS (( bfd *, struct bfd_link_info *, bfd *, asection *,
	  bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *,
	  asection **));
static boolean mn10200_elf_relax_section
  PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
static bfd_byte * mn10200_elf_get_relocated_section_contents
  PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
	   bfd_byte *, boolean, asymbol **));

/* We have to use RELA instructions since md_apply_fix3 in the assembler
   does absolutely nothing.  */
#define USE_RELA

enum reloc_type {
  R_MN10200_NONE = 0,
  R_MN10200_32,
  R_MN10200_16,
  R_MN10200_8,
  R_MN10200_24,
  R_MN10200_PCREL8,
  R_MN10200_PCREL16,
  R_MN10200_PCREL24,
  R_MN10200_MAX
};

static reloc_howto_type elf_mn10200_howto_table[] = {
  /* Dummy relocation.  Does nothing.  */
  HOWTO (R_MN10200_NONE,
	 0,
	 2,
	 16,
	 false,
	 0,
	 complain_overflow_bitfield,
	 bfd_elf_generic_reloc,
	 "R_MN10200_NONE",
	 false,
	 0,
	 0,
	 false),
  /* Standard 32 bit reloc.  */
  HOWTO (R_MN10200_32,
	 0,
	 2,
	 32,
	 false,
	 0,
	 complain_overflow_bitfield,
	 bfd_elf_generic_reloc,
	 "R_MN10200_32",
	 false,
	 0xffffffff,
	 0xffffffff,
	 false),
  /* Standard 16 bit reloc.  */
  HOWTO (R_MN10200_16,
	 0,
	 1,
	 16,
	 false,
	 0,
	 complain_overflow_bitfield,
	 bfd_elf_generic_reloc,
	 "R_MN10200_16",
	 false,
	 0xffff,
	 0xffff,
	 false),
  /* Standard 8 bit reloc.  */
  HOWTO (R_MN10200_8,
	 0,
	 0,
	 8,
	 false,
	 0,
	 complain_overflow_bitfield,
	 bfd_elf_generic_reloc,
	 "R_MN10200_8",
	 false,
	 0xff,
	 0xff,
	 false),
  /* Standard 24 bit reloc.  */
  HOWTO (R_MN10200_24,
	 0,
	 2,
	 24,
	 false,
	 0,
	 complain_overflow_bitfield,
	 bfd_elf_generic_reloc,
	 "R_MN10200_24",
	 false,
	 0xffffff,
	 0xffffff,
	 false),
  /* Simple 8 pc-relative reloc.  */
  HOWTO (R_MN10200_PCREL8,
	 0,
	 0,
	 8,
	 true,
	 0,
	 complain_overflow_bitfield,
	 bfd_elf_generic_reloc,
	 "R_MN10200_PCREL8",
	 false,
	 0xff,
	 0xff,
	 true),
  /* Simple 16 pc-relative reloc.  */
  HOWTO (R_MN10200_PCREL16,
	 0,
	 1,
	 16,
	 true,
	 0,
	 complain_overflow_bitfield,
	 bfd_elf_generic_reloc,
	 "R_MN10200_PCREL16",
	 false,
	 0xffff,
	 0xffff,
	 true),
  /* Simple 32bit pc-relative reloc with a 1 byte adjustment
     to get the pc-relative offset correct.  */
  HOWTO (R_MN10200_PCREL24,
	 0,
	 2,
	 24,
	 true,
	 0,
	 complain_overflow_bitfield,
	 bfd_elf_generic_reloc,
	 "R_MN10200_PCREL24",
	 false,
	 0xffffff,
	 0xffffff,
	 true),
};

struct mn10200_reloc_map {
  bfd_reloc_code_real_type bfd_reloc_val;
  unsigned char elf_reloc_val;
};

static const struct mn10200_reloc_map mn10200_reloc_map[] = {
  { BFD_RELOC_NONE    , R_MN10200_NONE   , },
  { BFD_RELOC_32      , R_MN10200_32     , },
  { BFD_RELOC_16      , R_MN10200_16     , },
  { BFD_RELOC_8       , R_MN10200_8      , },
  { BFD_RELOC_24      , R_MN10200_24     , },
  { BFD_RELOC_8_PCREL , R_MN10200_PCREL8 , },
  { BFD_RELOC_16_PCREL, R_MN10200_PCREL16, },
  { BFD_RELOC_24_PCREL, R_MN10200_PCREL24, },
};

static reloc_howto_type *
bfd_elf32_bfd_reloc_type_lookup (abfd, code)
     bfd *abfd ATTRIBUTE_UNUSED;
     bfd_reloc_code_real_type code;
{
  unsigned int i;

  for (i = 0;
       i < sizeof (mn10200_reloc_map) / sizeof (struct mn10200_reloc_map);
       i++)
    {
      if (mn10200_reloc_map[i].bfd_reloc_val == code)
	return &elf_mn10200_howto_table[mn10200_reloc_map[i].elf_reloc_val];
    }

  return NULL;
}

/* Set the howto pointer for an MN10200 ELF reloc.  */

static void
mn10200_info_to_howto (abfd, cache_ptr, dst)
     bfd *abfd ATTRIBUTE_UNUSED;
     arelent *cache_ptr;
     Elf32_Internal_Rela *dst;
{
  unsigned int r_type;

  r_type = ELF32_R_TYPE (dst->r_info);
  BFD_ASSERT (r_type < (unsigned int) R_MN10200_MAX);
  cache_ptr->howto = &elf_mn10200_howto_table[r_type];
}

/* Perform a relocation as part of a final link.  */

static bfd_reloc_status_type
mn10200_elf_final_link_relocate (howto, input_bfd, output_bfd,
				 input_section, contents, offset, value,
				 addend, info, sym_sec, is_local)
     reloc_howto_type *howto;
     bfd *input_bfd;
     bfd *output_bfd ATTRIBUTE_UNUSED;
     asection *input_section;
     bfd_byte *contents;
     bfd_vma offset;
     bfd_vma value;
     bfd_vma addend;
     struct bfd_link_info *info ATTRIBUTE_UNUSED;
     asection *sym_sec ATTRIBUTE_UNUSED;
     int is_local ATTRIBUTE_UNUSED;
{
  unsigned long r_type = howto->type;
  bfd_byte *hit_data = contents + offset;

  switch (r_type)
    {

    case R_MN10200_NONE:
      return bfd_reloc_ok;

    case R_MN10200_32:
      value += addend;
      bfd_put_32 (input_bfd, value, hit_data);
      return bfd_reloc_ok;

    case R_MN10200_16:
      value += addend;

      if ((long) value > 0x7fff || (long) value < -0x8000)
	return bfd_reloc_overflow;

      bfd_put_16 (input_bfd, value, hit_data);
      return bfd_reloc_ok;

    case R_MN10200_8:
      value += addend;

      if ((long) value > 0x7f || (long) value < -0x80)
	return bfd_reloc_overflow;

      bfd_put_8 (input_bfd, value, hit_data);
      return bfd_reloc_ok;

    case R_MN10200_24:
      value += addend;

      if ((long) value > 0x7fffff || (long) value < -0x800000)
	return bfd_reloc_overflow;

      value &= 0xffffff;
      value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000);
      bfd_put_32 (input_bfd, value, hit_data);
      return bfd_reloc_ok;

    case R_MN10200_PCREL8:
      value -= (input_section->output_section->vma
		+ input_section->output_offset);
      value -= (offset + 1);
      value += addend;

      if ((long) value > 0xff || (long) value < -0x100)
	return bfd_reloc_overflow;

      bfd_put_8 (input_bfd, value, hit_data);
      return bfd_reloc_ok;

    case R_MN10200_PCREL16:
      value -= (input_section->output_section->vma
		+ input_section->output_offset);
      value -= (offset + 2);
      value += addend;

      if ((long) value > 0xffff || (long) value < -0x10000)
	return bfd_reloc_overflow;

      bfd_put_16 (input_bfd, value, hit_data);
      return bfd_reloc_ok;

    case R_MN10200_PCREL24:
      value -= (input_section->output_section->vma
		+ input_section->output_offset);
      value -= (offset + 3);
      value += addend;

      if ((long) value > 0xffffff || (long) value < -0x1000000)
	return bfd_reloc_overflow;

      value &= 0xffffff;
      value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000);
      bfd_put_32 (input_bfd, value, hit_data);
      return bfd_reloc_ok;

    default:
      return bfd_reloc_notsupported;
    }
}

/* Relocate an MN10200 ELF section.  */
static boolean
mn10200_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;
  struct elf_link_hash_entry **sym_hashes;
  Elf_Internal_Rela *rel, *relend;

  symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
  sym_hashes = elf_sym_hashes (input_bfd);

  rel = relocs;
  relend = relocs + input_section->reloc_count;
  for (; rel < relend; rel++)
    {
      int r_type;
      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;

      r_symndx = ELF32_R_SYM (rel->r_info);
      r_type = ELF32_R_TYPE (rel->r_info);
      howto = elf_mn10200_howto_table + r_type;

      if (info->relocateable)
	{
	  /* This is a relocateable link.  We don't have to change
             anything, unless the reloc is against a section symbol,
             in which case we have to adjust according to where the
             section symbol winds up in the output section.  */
	  if (r_symndx < symtab_hdr->sh_info)
	    {
	      sym = local_syms + r_symndx;
	      if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
		{
		  sec = local_sections[r_symndx];
		  rel->r_addend += sec->output_offset + sym->st_value;
		}
	    }

	  continue;
	}

      /* This is a final link.  */
      h = NULL;
      sym = NULL;
      sec = NULL;
      if (r_symndx < symtab_hdr->sh_info)
	{
	  sym = local_syms + r_symndx;
	  sec = local_sections[r_symndx];
	  relocation = (sec->output_section->vma
			+ sec->output_offset
			+ sym->st_value);
	}
      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;
	  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
			    + sec->output_section->vma
			    + sec->output_offset);
	    }
	  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, true)))
		return false;
	      relocation = 0;
	    }
	}

      r = mn10200_elf_final_link_relocate (howto, input_bfd, output_bfd,
					   input_section,
					   contents, rel->r_offset,
					   relocation, rel->r_addend,
					   info, sec, h == NULL);

      if (r != bfd_reloc_ok)
	{
	  const char *name;
	  const char *msg = (const char *) 0;

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

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

	    case bfd_reloc_undefined:
	      if (! ((*info->callbacks->undefined_symbol)
		     (info, name, input_bfd, input_section,
		      rel->r_offset, true)))
		return false;
	      break;

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

	    case bfd_reloc_notsupported:
	      msg = _("internal error: unsupported relocation error");
	      goto common_error;

	    case bfd_reloc_dangerous:
	      msg = _("internal error: dangerous error");
	      goto common_error;

	    default:
	      msg = _("internal error: unknown error");
	      /* fall through */

	    common_error:
	      if (!((*info->callbacks->warning)
		    (info, msg, name, input_bfd, input_section,
		     rel->r_offset)))
		return false;
	      break;
	    }
	}
    }

  return true;
}

/* This function handles relaxing for the mn10200.

   There's quite a few relaxing opportunites available on the mn10200:

	* jsr:24 -> jsr:16 					   2 bytes

	* jmp:24 -> jmp:16					   2 bytes
	* jmp:16 -> bra:8					   1 byte

		* If the previous instruction is a conditional branch
		around the jump/bra, we may be able to reverse its condition
		and change its target to the jump's target.  The jump/bra
		can then be deleted.				   2 bytes

	* mov abs24 -> mov abs16	2 byte savings

	* Most instructions which accept imm24 can relax to imm16  2 bytes
	- Most instructions which accept imm16 can relax to imm8   1 byte

	* Most instructions which accept d24 can relax to d16	   2 bytes
	- Most instructions which accept d16 can relax to d8	   1 byte

	abs24, imm24, d24 all look the same at the reloc level.  It
	might make the code simpler if we had different relocs for
	the various relaxable operand types.

	We don't handle imm16->imm8 or d16->d8 as they're very rare
	and somewhat more difficult to support.  */

static boolean
mn10200_elf_relax_section (abfd, sec, link_info, again)
     bfd *abfd;
     asection *sec;
     struct bfd_link_info *link_info;
     boolean *again;
{
  Elf_Internal_Shdr *symtab_hdr;
  Elf_Internal_Rela *internal_relocs;
  Elf_Internal_Rela *free_relocs = NULL;
  Elf_Internal_Rela *irel, *irelend;
  bfd_byte *contents = NULL;
  bfd_byte *free_contents = NULL;
  Elf32_External_Sym *extsyms = NULL;
  Elf32_External_Sym *free_extsyms = NULL;

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

  /* We don't have to do anything for a relocateable link, if
     this section does not have relocs, or if this is not a
     code section.  */
  if (link_info->relocateable
      || (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,
     initialize the cooked size.  */
  if (sec->_cooked_size == 0)
    sec->_cooked_size = sec->_raw_size;

  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;

  /* Get a copy of the native relocations.  */
  internal_relocs = (_bfd_elf32_link_read_relocs
		     (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
		      link_info->keep_memory));
  if (internal_relocs == NULL)
    goto error_return;
  if (! link_info->keep_memory)
    free_relocs = internal_relocs;

  /* Walk through them looking for relaxing opportunities.  */
  irelend = internal_relocs + sec->reloc_count;
  for (irel = internal_relocs; irel < irelend; irel++)
    {
      bfd_vma symval;

      /* If this isn't something that can be relaxed, then ignore
	 this reloc.  */
      if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_NONE
	  || ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_8
	  || ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_MAX)
	continue;

      /* Get the section contents if we haven't done so already.  */
      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;
	      free_contents = contents;

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

      /* Read this BFD's symbols if we haven't done so already.  */
      if (extsyms == NULL)
	{
	  /* Get cached copy if it exists.  */
	  if (symtab_hdr->contents != NULL)
	    extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
	  else
	    {
	      /* Go get them off disk.  */
	      extsyms = ((Elf32_External_Sym *)
			 bfd_malloc (symtab_hdr->sh_size));
	      if (extsyms == NULL)
		goto error_return;
	      free_extsyms = extsyms;
	      if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0
		  || (bfd_read (extsyms, 1, symtab_hdr->sh_size, abfd)
		      != symtab_hdr->sh_size))
		goto error_return;
	    }
	}

      /* Get the value of the symbol referred to by the reloc.  */
      if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
	{
	  Elf_Internal_Sym isym;
	  asection *sym_sec;

	  /* A local symbol.  */
	  bfd_elf32_swap_symbol_in (abfd,
				    extsyms + ELF32_R_SYM (irel->r_info),
				    &isym);

	  sym_sec = bfd_section_from_elf_index (abfd, isym.st_shndx);
	  symval = (isym.st_value
		    + sym_sec->output_section->vma
		    + sym_sec->output_offset);
	}
      else
	{
	  unsigned long indx;
	  struct elf_link_hash_entry *h;

	  /* An external symbol.  */
	  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)
	    {
	      /* This appears to be a reference to an undefined
                 symbol.  Just ignore it--it will be caught by the
                 regular reloc processing.  */
	      continue;
	    }

	  symval = (h->root.u.def.value
		    + h->root.u.def.section->output_section->vma
		    + h->root.u.def.section->output_offset);
	}

      /* For simplicity of coding, we are going to modify the section
	 contents, the section relocs, and the BFD symbol table.  We
	 must tell the rest of the code not to free up this
	 information.  It would be possible to instead create a table
	 of changes which have to be made, as is done in coff-mips.c;
	 that would be more work, but would require less memory when
	 the linker is run.  */

      /* Try to turn a 24bit pc-relative branch/call into a 16bit pc-relative
	 branch/call.  */
      if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_PCREL24)
	{
	  bfd_vma value = symval;

	  /* Deal with pc-relative gunk.  */
	  value -= (sec->output_section->vma + sec->output_offset);
	  value -= (irel->r_offset + 3);
	  value += irel->r_addend;

	  /* See if the value will fit in 16 bits, note the high value is
	     0x7fff + 2 as the target will be two bytes closer if we are
	     able to relax.  */
	  if ((long) value < 0x8001 && (long) value > -0x8000)
	    {
	      unsigned char code;

	      /* Get the opcode.  */
	      code = bfd_get_8 (abfd, contents + irel->r_offset - 1);

	      if (code != 0xe0 && code != 0xe1)
		continue;

	      /* Note that we've changed the relocs, section contents, etc.  */
	      elf_section_data (sec)->relocs = internal_relocs;
	      free_relocs = NULL;

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

	      symtab_hdr->contents = (bfd_byte *) extsyms;
	      free_extsyms = NULL;

	      /* Fix the opcode.  */
	      if (code == 0xe0)
		bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 2);
	      else if (code == 0xe1)
		bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 2);

	      /* Fix the relocation's type.  */
	      irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
					   R_MN10200_PCREL16);

	      /* The opcode got shorter too, so we have to fix the offset.  */
	      irel->r_offset -= 1;

	      /* Delete two bytes of data.  */
	      if (!mn10200_elf_relax_delete_bytes (abfd, sec,
						   irel->r_offset + 1, 2))
		goto error_return;

	      /* That will change things, so, we should relax again.
		 Note that this is not required, and it may be slow.  */
	      *again = true;
	    }
	}

      /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative
	 branch.  */
      if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_PCREL16)
	{
	  bfd_vma value = symval;

	  /* Deal with pc-relative gunk.  */
	  value -= (sec->output_section->vma + sec->output_offset);
	  value -= (irel->r_offset + 2);
	  value += irel->r_addend;

	  /* See if the value will fit in 8 bits, note the high value is
	     0x7f + 1 as the target will be one bytes closer if we are
	     able to relax.  */
	  if ((long) value < 0x80 && (long) value > -0x80)
	    {
	      unsigned char code;

	      /* Get the opcode.  */
	      code = bfd_get_8 (abfd, contents + irel->r_offset - 1);

	      if (code != 0xfc)
		continue;

	      /* Note that we've changed the relocs, section contents, etc.  */
	      elf_section_data (sec)->relocs = internal_relocs;
	      free_relocs = NULL;

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

	      symtab_hdr->contents = (bfd_byte *) extsyms;
	      free_extsyms = NULL;

	      /* Fix the opcode.  */
	      bfd_put_8 (abfd, 0xea, contents + irel->r_offset - 1);

	      /* Fix the relocation's type.  */
	      irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
					   R_MN10200_PCREL8);

	      /* Delete one byte of data.  */
	      if (!mn10200_elf_relax_delete_bytes (abfd, sec,
						   irel->r_offset + 1, 1))
		goto error_return;

	      /* That will change things, so, we should relax again.
		 Note that this is not required, and it may be slow.  */
	      *again = true;
	    }
	}

      /* Try to eliminate an unconditional 8 bit pc-relative branch
	 which immediately follows a conditional 8 bit pc-relative
	 branch around the unconditional branch.

	    original:		new:
	    bCC lab1		bCC' lab2
	    bra lab2
	   lab1:	       lab1:

	 This happens when the bCC can't reach lab2 at assembly time,
	 but due to other relaxations it can reach at link time.  */
      if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_PCREL8)
	{
	  Elf_Internal_Rela *nrel;
	  bfd_vma value = symval;
	  unsigned char code;

	  /* Deal with pc-relative gunk.  */
	  value -= (sec->output_section->vma + sec->output_offset);
	  value -= (irel->r_offset + 1);
	  value += irel->r_addend;

	  /* Do nothing if this reloc is the last byte in the section.  */
	  if (irel->r_offset == sec->_cooked_size)
	    continue;

	  /* See if the next instruction is an unconditional pc-relative
	     branch, more often than not this test will fail, so we
	     test it first to speed things up.  */
	  code = bfd_get_8 (abfd, contents + irel->r_offset + 1);
	  if (code != 0xea)
	    continue;

	  /* Also make sure the next relocation applies to the next
	     instruction and that it's a pc-relative 8 bit branch.  */
	  nrel = irel + 1;
	  if (nrel == irelend
	      || irel->r_offset + 2 != nrel->r_offset
	      || ELF32_R_TYPE (nrel->r_info) != (int) R_MN10200_PCREL8)
	    continue;

	  /* Make sure our destination immediately follows the
	     unconditional branch.  */
	  if (symval != (sec->output_section->vma + sec->output_offset
			 + irel->r_offset + 3))
	    continue;

	  /* Now make sure we are a conditional branch.  This may not
	     be necessary, but why take the chance.

	     Note these checks assume that R_MN10200_PCREL8 relocs
	     only occur on bCC and bCCx insns.  If they occured
	     elsewhere, we'd need to know the start of this insn
	     for this check to be accurate.  */
	  code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
	  if (code != 0xe0 && code != 0xe1 && code != 0xe2
	      && code != 0xe3 && code != 0xe4 && code != 0xe5
	      && code != 0xe6 && code != 0xe7 && code != 0xe8
	      && code != 0xe9 && code != 0xec && code != 0xed
	      && code != 0xee && code != 0xef && code != 0xfc
	      && code != 0xfd && code != 0xfe && code != 0xff)
	    continue;

	  /* We also have to be sure there is no symbol/label
	     at the unconditional branch.  */
	  if (mn10200_elf_symbol_address_p (abfd, sec, extsyms,
					    irel->r_offset + 1))
	    continue;

	  /* Note that we've changed the relocs, section contents, etc.  */
	  elf_section_data (sec)->relocs = internal_relocs;
	  free_relocs = NULL;

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

	  symtab_hdr->contents = (bfd_byte *) extsyms;
	  free_extsyms = NULL;

	  /* Reverse the condition of the first branch.  */
	  switch (code)
	    {
	    case 0xfc:
	      code = 0xfd;
	      break;
	    case 0xfd:
	      code = 0xfc;
	      break;
	    case 0xfe:
	      code = 0xff;
	      break;
	    case 0xff:
	      code = 0xfe;
	      break;
	    case 0xe8:
	      code = 0xe9;
	      break;
	    case 0xe9:
	      code = 0xe8;
	      break;
	    case 0xe0:
	      code = 0xe2;
	      break;
	    case 0xe2:
	      code = 0xe0;
	      break;
	    case 0xe3:
	      code = 0xe1;
	      break;
	    case 0xe1:
	      code = 0xe3;
	      break;
	    case 0xe4:
	      code = 0xe6;
	      break;
	    case 0xe6:
	      code = 0xe4;
	      break;
	    case 0xe7:
	      code = 0xe5;
	      break;
	    case 0xe5:
	      code = 0xe7;
	      break;
	    case 0xec:
	      code = 0xed;
	      break;
	    case 0xed:
	      code = 0xec;
	      break;
	    case 0xee:
	      code = 0xef;
	      break;
	    case 0xef:
	      code = 0xee;
	      break;
	    }
	  bfd_put_8 (abfd, code, contents + irel->r_offset - 1);

	  /* Set the reloc type and symbol for the first branch
	     from the second branch.  */
	  irel->r_info = nrel->r_info;

	  /* Make the reloc for the second branch a null reloc.  */
	  nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info),
				       R_MN10200_NONE);

	  /* Delete two bytes of data.  */
	  if (!mn10200_elf_relax_delete_bytes (abfd, sec,
					       irel->r_offset + 1, 2))
	    goto error_return;

	  /* That will change things, so, we should relax again.
	     Note that this is not required, and it may be slow.  */
	  *again = true;
	}

      /* Try to turn a 24bit immediate, displacement or absolute address
	 into a 16bit immediate, displacement or absolute address.  */
      if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_24)
	{
	  bfd_vma value = symval;

	  /* See if the value will fit in 16 bits.
	     We allow any 16bit match here.  We prune those we can't
	     handle below.  */
	  if ((long) value < 0x7fff && (long) value > -0x8000)
	    {
	      unsigned char code;

	      /* All insns which have 24bit operands are 5 bytes long,
		 the first byte will always be 0xf4, but we double check
		 it just in case.  */

	      /* Get the first opcode.  */
	      code = bfd_get_8 (abfd, contents + irel->r_offset - 2);

	      if (code != 0xf4)
		continue;

	      /* Get the second opcode.  */
	      code = bfd_get_8 (abfd, contents + irel->r_offset - 1);

	      switch (code & 0xfc)
		{
		/* mov imm24,dn -> mov imm16,dn */
		case 0x70:
		  /* Not safe if the high bit is on as relaxing may
		     move the value out of high mem and thus not fit
		     in a signed 16bit value.  */
		  if (value & 0x8000)
		    continue;

		  /* Note that we've changed the reldection contents, etc.  */
		  elf_section_data (sec)->relocs = internal_relocs;
		  free_relocs = NULL;

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

		  symtab_hdr->contents = (bfd_byte *) extsyms;
		  free_extsyms = NULL;

		  /* Fix the opcode.  */
		  bfd_put_8 (abfd, 0xf8 + (code & 0x03),
			     contents + irel->r_offset - 2);

		  /* Fix the relocation's type.  */
		  irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
					       R_MN10200_16);

		  /* The opcode got shorter too, so we have to fix the
		     offset.  */
		  irel->r_offset -= 1;

		  /* Delete two bytes of data.  */
		  if (!mn10200_elf_relax_delete_bytes (abfd, sec,
						       irel->r_offset + 1, 2))
		    goto error_return;

		  /* That will change things, so, we should relax again.
		     Note that this is not required, and it may be slow.  */
		  *again = true;
		  break;

		/* mov imm24,an -> mov imm16,an
		   cmp imm24,an -> cmp imm16,an
		   mov (abs24),dn -> mov (abs16),dn
		   mov dn,(abs24) -> mov dn,(abs16)
		   movb dn,(abs24) -> movb dn,(abs16)
		   movbu (abs24),dn -> movbu (abs16),dn */
		case 0x74:
		case 0x7c:
		case 0xc0:
		case 0x40:
		case 0x44:
		case 0xc8:
		  /* Note that we've changed the reldection contents, etc.  */
		  elf_section_data (sec)->relocs = internal_relocs;
		  free_relocs = NULL;

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

		  symtab_hdr->contents = (bfd_byte *) extsyms;
		  free_extsyms = NULL;

		  if ((code & 0xfc) == 0x74)
		    code = 0xdc + (code & 0x03);
		  else if ((code & 0xfc) == 0x7c)
		    code = 0xec + (code & 0x03);
		  else if ((code & 0xfc) == 0xc0)
		    code = 0xc8 + (code & 0x03);
		  else if ((code & 0xfc) == 0x40)
		    code = 0xc0 + (code & 0x03);
		  else if ((code & 0xfc) == 0x44)
		    code = 0xc4 + (code & 0x03);
		  else if ((code & 0xfc) == 0xc8)
		    code = 0xcc + (code & 0x03);

		  /* Fix the opcode.  */
		  bfd_put_8 (abfd, code, contents + irel->r_offset - 2);

		  /* Fix the relocation's type.  */
		  irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
					       R_MN10200_16);

		  /* The opcode got shorter too, so we have to fix the
		     offset.  */
		  irel->r_offset -= 1;

		  /* Delete two bytes of data.  */
		  if (!mn10200_elf_relax_delete_bytes (abfd, sec,
						       irel->r_offset + 1, 2))
		    goto error_return;

		  /* That will change things, so, we should relax again.
		     Note that this is not required, and it may be slow.  */
		  *again = true;
		  break;

		/* cmp imm24,dn -> cmp imm16,dn
		   mov (abs24),an -> mov (abs16),an
		   mov an,(abs24) -> mov an,(abs16)
		   add imm24,dn -> add imm16,dn
		   add imm24,an -> add imm16,an
		   sub imm24,dn -> sub imm16,dn
		   sub imm24,an -> sub imm16,an
		   And all d24->d16 in memory ops.  */
		case 0x78:
		case 0xd0:
		case 0x50:
		case 0x60:
		case 0x64:
		case 0x68:
		case 0x6c:
		case 0x80:
		case 0xf0:
		case 0x00:
		case 0x10:
		case 0xb0:
		case 0x30:
		case 0xa0:
		case 0x20:
		case 0x90:
		  /* Not safe if the high bit is on as relaxing may
		     move the value out of high mem and thus not fit
		     in a signed 16bit value.  */
		  if (((code & 0xfc) == 0x78
		       || (code & 0xfc) == 0x60
		       || (code & 0xfc) == 0x64
		       || (code & 0xfc) == 0x68
		       || (code & 0xfc) == 0x6c
		       || (code & 0xfc) == 0x80
		       || (code & 0xfc) == 0xf0
		       || (code & 0xfc) == 0x00
		       || (code & 0xfc) == 0x10
		       || (code & 0xfc) == 0xb0
		       || (code & 0xfc) == 0x30
		       || (code & 0xfc) == 0xa0
		       || (code & 0xfc) == 0x20
		       || (code & 0xfc) == 0x90)
		      && (value & 0x8000) != 0)
		    continue;

		  /* Note that we've changed the reldection contents, etc.  */
		  elf_section_data (sec)->relocs = internal_relocs;
		  free_relocs = NULL;

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

		  symtab_hdr->contents = (bfd_byte *) extsyms;
		  free_extsyms = NULL;

		  /* Fix the opcode.  */
		  bfd_put_8 (abfd, 0xf7, contents + irel->r_offset - 2);

		  if ((code & 0xfc) == 0x78)
		    code = 0x48 + (code & 0x03);
		  else if ((code & 0xfc) == 0xd0)
		    code = 0x30 + (code & 0x03);
		  else if ((code & 0xfc) == 0x50)
		    code = 0x20 + (code & 0x03);
		  else if ((code & 0xfc) == 0x60)
		    code = 0x18 + (code & 0x03);
		  else if ((code & 0xfc) == 0x64)
		    code = 0x08 + (code & 0x03);
		  else if ((code & 0xfc) == 0x68)
		    code = 0x1c + (code & 0x03);
		  else if ((code & 0xfc) == 0x6c)
		    code = 0x0c + (code & 0x03);
		  else if ((code & 0xfc) == 0x80)
		    code = 0xc0 + (code & 0x07);
		  else if ((code & 0xfc) == 0xf0)
		    code = 0xb0 + (code & 0x07);
		  else if ((code & 0xfc) == 0x00)
		    code = 0x80 + (code & 0x07);
		  else if ((code & 0xfc) == 0x10)
		    code = 0xa0 + (code & 0x07);
		  else if ((code & 0xfc) == 0xb0)
		    code = 0x70 + (code & 0x07);
		  else if ((code & 0xfc) == 0x30)
		    code = 0x60 + (code & 0x07);
		  else if ((code & 0xfc) == 0xa0)
		    code = 0xd0 + (code & 0x07);
		  else if ((code & 0xfc) == 0x20)
		    code = 0x90 + (code & 0x07);
		  else if ((code & 0xfc) == 0x90)
		    code = 0x50 + (code & 0x07);

		  bfd_put_8 (abfd, code, contents + irel->r_offset - 1);

		  /* Fix the relocation's type.  */
		  irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
					       R_MN10200_16);

		  /* Delete one bytes of data.  */
		  if (!mn10200_elf_relax_delete_bytes (abfd, sec,
						       irel->r_offset + 2, 1))
		    goto error_return;

		  /* That will change things, so, we should relax again.
		     Note that this is not required, and it may be slow.  */
		  *again = true;
		  break;

		/* movb (abs24),dn ->movbu (abs16),dn extxb bn */
		case 0xc4:
		  /* Note that we've changed the reldection contents, etc.  */
		  elf_section_data (sec)->relocs = internal_relocs;
		  free_relocs = NULL;

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

		  symtab_hdr->contents = (bfd_byte *) extsyms;
		  free_extsyms = NULL;

		  bfd_put_8 (abfd, 0xcc + (code & 0x03),
			     contents + irel->r_offset - 2);

		  bfd_put_8 (abfd, 0xb8 + (code & 0x03),
			     contents + irel->r_offset - 1);

		  /* Fix the relocation's type.  */
		  irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
					       R_MN10200_16);

		  /* The reloc will be applied one byte in front of its
		     current location.  */
		  irel->r_offset -= 1;

		  /* Delete one bytes of data.  */
		  if (!mn10200_elf_relax_delete_bytes (abfd, sec,
						       irel->r_offset + 2, 1))
		    goto error_return;

		  /* That will change things, so, we should relax again.
		     Note that this is not required, and it may be slow.  */
		  *again = true;
		  break;
		}
	    }
	}
    }

  if (free_relocs != NULL)
    {
      free (free_relocs);
      free_relocs = NULL;
    }

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

  if (free_extsyms != NULL)
    {
      if (! link_info->keep_memory)
	free (free_extsyms);
      else
	{
	  /* Cache the symbols for elf_link_input_bfd.  */
	  symtab_hdr->contents = extsyms;
	}
      free_extsyms = NULL;
    }

  return true;

 error_return:
  if (free_relocs != NULL)
    free (free_relocs);
  if (free_contents != NULL)
    free (free_contents);
  if (free_extsyms != NULL)
    free (free_extsyms);
  return false;
}

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

static boolean
mn10200_elf_relax_delete_bytes (abfd, sec, addr, count)
     bfd *abfd;
     asection *sec;
     bfd_vma addr;
     int count;
{
  Elf_Internal_Shdr *symtab_hdr;
  Elf32_External_Sym *extsyms;
  int shndx, index;
  bfd_byte *contents;
  Elf_Internal_Rela *irel, *irelend;
  Elf_Internal_Rela *irelalign;
  bfd_vma toaddr;
  Elf32_External_Sym *esym, *esymend;
  struct elf_link_hash_entry *sym_hash;

  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
  extsyms = (Elf32_External_Sym *) symtab_hdr->contents;

  shndx = _bfd_elf_section_from_bfd_section (abfd, sec);

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

  /* The deletion must stop at the next ALIGN reloc for an aligment
     power larger than the number of bytes we are deleting.  */

  irelalign = NULL;
  toaddr = sec->_cooked_size;

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

  /* Actually delete the bytes.  */
  memmove (contents + addr, contents + addr + count, toaddr - addr - count);
  sec->_cooked_size -= count;

  /* Adjust all the relocs.  */
  for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
    {
      /* Get the new reloc address.  */
      if ((irel->r_offset > addr
	   && irel->r_offset < toaddr))
	irel->r_offset -= count;
    }

  /* Adjust the local symbols defined in this section.  */
  esym = extsyms;
  esymend = esym + symtab_hdr->sh_info;
  for (; esym < esymend; esym++)
    {
      Elf_Internal_Sym isym;

      bfd_elf32_swap_symbol_in (abfd, esym, &isym);

      if (isym.st_shndx == shndx
	  && isym.st_value > addr
	  && isym.st_value < toaddr)
	{
	  isym.st_value -= count;
	  bfd_elf32_swap_symbol_out (abfd, &isym, esym);
	}
    }

  /* Now adjust the global symbols defined in this section.  */
  esym = extsyms + symtab_hdr->sh_info;
  esymend = extsyms + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym));
  for (index = 0; esym < esymend; esym++, index++)
    {
      Elf_Internal_Sym isym;

      bfd_elf32_swap_symbol_in (abfd, esym, &isym);
      sym_hash = elf_sym_hashes (abfd)[index];
      if (isym.st_shndx == shndx
	  && ((sym_hash)->root.type == bfd_link_hash_defined
	      || (sym_hash)->root.type == bfd_link_hash_defweak)
	  && (sym_hash)->root.u.def.section == sec
	  && (sym_hash)->root.u.def.value > addr
	  && (sym_hash)->root.u.def.value < toaddr)
	{
	  (sym_hash)->root.u.def.value -= count;
	}
    }

  return true;
}

/* Return true if a symbol exists at the given address, else return
   false.  */
static boolean
mn10200_elf_symbol_address_p (abfd, sec, extsyms, addr)
     bfd *abfd;
     asection *sec;
     Elf32_External_Sym *extsyms;
     bfd_vma addr;
{
  Elf_Internal_Shdr *symtab_hdr;
  int shndx;
  Elf32_External_Sym *esym, *esymend;
  struct elf_link_hash_entry **sym_hash, **sym_hash_end;

  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
  shndx = _bfd_elf_section_from_bfd_section (abfd, sec);

  /* Examine all the symbols.  */
  esym = extsyms;
  esymend = esym + symtab_hdr->sh_info;
  for (; esym < esymend; esym++)
    {
      Elf_Internal_Sym isym;

      bfd_elf32_swap_symbol_in (abfd, esym, &isym);

      if (isym.st_shndx == shndx
	  && isym.st_value == addr)
	return true;
    }

  sym_hash = elf_sym_hashes (abfd);
  sym_hash_end = (sym_hash
		  + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
		     - symtab_hdr->sh_info));
  for (; sym_hash < sym_hash_end; sym_hash++)
    {
      if (((*sym_hash)->root.type == bfd_link_hash_defined
	   || (*sym_hash)->root.type == bfd_link_hash_defweak)
	  && (*sym_hash)->root.u.def.section == sec
	  && (*sym_hash)->root.u.def.value == addr)
	return true;
    }
  return false;
}

/* This is a version of bfd_generic_get_relocated_section_contents
   which uses mn10200_elf_relocate_section.  */

static bfd_byte *
mn10200_elf_get_relocated_section_contents (output_bfd, link_info, link_order,
					    data, relocateable, symbols)
     bfd *output_bfd;
     struct bfd_link_info *link_info;
     struct bfd_link_order *link_order;
     bfd_byte *data;
     boolean relocateable;
     asymbol **symbols;
{
  Elf_Internal_Shdr *symtab_hdr;
  asection *input_section = link_order->u.indirect.section;
  bfd *input_bfd = input_section->owner;
  asection **sections = NULL;
  Elf_Internal_Rela *internal_relocs = NULL;
  Elf32_External_Sym *external_syms = NULL;
  Elf_Internal_Sym *internal_syms = NULL;

  /* We only need to handle the case of relaxing, or of having a
     particular set of section contents, specially.  */
  if (relocateable
      || elf_section_data (input_section)->this_hdr.contents == NULL)
    return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
						       link_order, data,
						       relocateable,
						       symbols);

  symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;

  memcpy (data, elf_section_data (input_section)->this_hdr.contents,
	  input_section->_raw_size);

  if ((input_section->flags & SEC_RELOC) != 0
      && input_section->reloc_count > 0)
    {
      Elf_Internal_Sym *isymp;
      asection **secpp;
      Elf32_External_Sym *esym, *esymend;

      if (symtab_hdr->contents != NULL)
	external_syms = (Elf32_External_Sym *) symtab_hdr->contents;
      else
	{
	  external_syms = ((Elf32_External_Sym *)
			   bfd_malloc (symtab_hdr->sh_info
				       * sizeof (Elf32_External_Sym)));
	  if (external_syms == NULL && symtab_hdr->sh_info > 0)
	    goto error_return;
	  if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
	      || (bfd_read (external_syms, sizeof (Elf32_External_Sym),
			    symtab_hdr->sh_info, input_bfd)
		  != (symtab_hdr->sh_info * sizeof (Elf32_External_Sym))))
	    goto error_return;
	}

      internal_relocs = (_bfd_elf32_link_read_relocs
			 (input_bfd, input_section, (PTR) NULL,
			  (Elf_Internal_Rela *) NULL, false));
      if (internal_relocs == NULL)
	goto error_return;

      internal_syms = ((Elf_Internal_Sym *)
		       bfd_malloc (symtab_hdr->sh_info
				   * sizeof (Elf_Internal_Sym)));
      if (internal_syms == NULL && symtab_hdr->sh_info > 0)
	goto error_return;

      sections = (asection **) bfd_malloc (symtab_hdr->sh_info
					   * sizeof (asection *));
      if (sections == NULL && symtab_hdr->sh_info > 0)
	goto error_return;

      isymp = internal_syms;
      secpp = sections;
      esym = external_syms;
      esymend = esym + symtab_hdr->sh_info;
      for (; esym < esymend; ++esym, ++isymp, ++secpp)
	{
	  asection *isec;

	  bfd_elf32_swap_symbol_in (input_bfd, esym, isymp);

	  if (isymp->st_shndx == SHN_UNDEF)
	    isec = bfd_und_section_ptr;
	  else if (isymp->st_shndx > 0 && isymp->st_shndx < SHN_LORESERVE)
	    isec = bfd_section_from_elf_index (input_bfd, isymp->st_shndx);
	  else if (isymp->st_shndx == SHN_ABS)
	    isec = bfd_abs_section_ptr;
	  else if (isymp->st_shndx == SHN_COMMON)
	    isec = bfd_com_section_ptr;
	  else
	    {
	      /* Who knows?  */
	      isec = NULL;
	    }

	  *secpp = isec;
	}

      if (! mn10200_elf_relocate_section (output_bfd, link_info, input_bfd,
				     input_section, data, internal_relocs,
				     internal_syms, sections))
	goto error_return;

      if (sections != NULL)
	free (sections);
      sections = NULL;
      if (internal_syms != NULL)
	free (internal_syms);
      internal_syms = NULL;
      if (external_syms != NULL && symtab_hdr->contents == NULL)
	free (external_syms);
      external_syms = NULL;
      if (internal_relocs != elf_section_data (input_section)->relocs)
	free (internal_relocs);
      internal_relocs = NULL;
    }

  return data;

 error_return:
  if (internal_relocs != NULL
      && internal_relocs != elf_section_data (input_section)->relocs)
    free (internal_relocs);
  if (external_syms != NULL && symtab_hdr->contents == NULL)
    free (external_syms);
  if (internal_syms != NULL)
    free (internal_syms);
  if (sections != NULL)
    free (sections);
  return NULL;
}

#define TARGET_LITTLE_SYM	bfd_elf32_mn10200_vec
#define TARGET_LITTLE_NAME	"elf32-mn10200"
#define ELF_ARCH		bfd_arch_mn10200
#define ELF_MACHINE_CODE	EM_MN10200
#define ELF_MACHINE_ALT1	EM_CYGNUS_MN10200
#define ELF_MAXPAGESIZE		0x1000

#define elf_info_to_howto	mn10200_info_to_howto
#define elf_info_to_howto_rel	0
#define elf_backend_relocate_section mn10200_elf_relocate_section
#define bfd_elf32_bfd_relax_section	mn10200_elf_relax_section
#define bfd_elf32_bfd_get_relocated_section_contents \
				mn10200_elf_get_relocated_section_contents

#define elf_symbol_leading_char '_'

#include "elf32-target.h"