summaryrefslogtreecommitdiff
path: root/bfd/elf32-m68hc1x.c
blob: dcb13d6463f9256558fd79a3c44becd9939d6ab4 (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
/* Motorola 68HC11/HC12-specific support for 32-bit ELF
   Copyright (C) 1999-2018 Free Software Foundation, Inc.
   Contributed by Stephane Carrez (stcarrez@nerim.fr)

   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 3 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., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

#include "sysdep.h"
#include "alloca-conf.h"
#include "bfd.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf32-m68hc1x.h"
#include "elf/m68hc11.h"
#include "opcode/m68hc11.h"
#include "libiberty.h"

#define m68hc12_stub_hash_lookup(table, string, create, copy) \
  ((struct elf32_m68hc11_stub_hash_entry *) \
   bfd_hash_lookup ((table), (string), (create), (copy)))

static struct elf32_m68hc11_stub_hash_entry* m68hc12_add_stub
  (const char *stub_name,
   asection *section,
   struct m68hc11_elf_link_hash_table *htab);

static struct bfd_hash_entry *stub_hash_newfunc
  (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);

static void m68hc11_elf_set_symbol (bfd* abfd, struct bfd_link_info *info,
				    const char* name, bfd_vma value,
				    asection* sec);

static bfd_boolean m68hc11_elf_export_one_stub
  (struct bfd_hash_entry *gen_entry, void *in_arg);

static void scan_sections_for_abi (bfd*, asection*, void *);

struct m68hc11_scan_param
{
   struct m68hc11_page_info* pinfo;
   bfd_boolean use_memory_banks;
};


/* Destroy a 68HC11/68HC12 ELF linker hash table.  */

static void
m68hc11_elf_bfd_link_hash_table_free (bfd *obfd)
{
  struct m68hc11_elf_link_hash_table *ret
    = (struct m68hc11_elf_link_hash_table *) obfd->link.hash;

  bfd_hash_table_free (ret->stub_hash_table);
  free (ret->stub_hash_table);
  _bfd_elf_link_hash_table_free (obfd);
}

/* Create a 68HC11/68HC12 ELF linker hash table.  */

struct m68hc11_elf_link_hash_table*
m68hc11_elf_hash_table_create (bfd *abfd)
{
  struct m68hc11_elf_link_hash_table *ret;
  bfd_size_type amt = sizeof (struct m68hc11_elf_link_hash_table);

  ret = (struct m68hc11_elf_link_hash_table *) bfd_zmalloc (amt);
  if (ret == (struct m68hc11_elf_link_hash_table *) NULL)
    return NULL;

  if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
				      _bfd_elf_link_hash_newfunc,
				      sizeof (struct elf_link_hash_entry),
				      M68HC11_ELF_DATA))
    {
      free (ret);
      return NULL;
    }

  /* Init the stub hash table too.  */
  amt = sizeof (struct bfd_hash_table);
  ret->stub_hash_table = (struct bfd_hash_table*) bfd_malloc (amt);
  if (ret->stub_hash_table == NULL)
    {
      _bfd_elf_link_hash_table_free (abfd);
      return NULL;
    }
  if (!bfd_hash_table_init (ret->stub_hash_table, stub_hash_newfunc,
			    sizeof (struct elf32_m68hc11_stub_hash_entry)))
    {
      free (ret->stub_hash_table);
      _bfd_elf_link_hash_table_free (abfd);
      return NULL;
    }
  ret->root.root.hash_table_free = m68hc11_elf_bfd_link_hash_table_free;

  return ret;
}

/* Assorted hash table functions.  */

/* Initialize an entry in the stub hash table.  */

static struct bfd_hash_entry *
stub_hash_newfunc (struct bfd_hash_entry *entry, struct bfd_hash_table *table,
		   const char *string)
{
  /* Allocate the structure if it has not already been allocated by a
     subclass.  */
  if (entry == NULL)
    {
      entry = bfd_hash_allocate (table,
				 sizeof (struct elf32_m68hc11_stub_hash_entry));
      if (entry == NULL)
	return entry;
    }

  /* Call the allocation method of the superclass.  */
  entry = bfd_hash_newfunc (entry, table, string);
  if (entry != NULL)
    {
      struct elf32_m68hc11_stub_hash_entry *eh;

      /* Initialize the local fields.  */
      eh = (struct elf32_m68hc11_stub_hash_entry *) entry;
      eh->stub_sec = NULL;
      eh->stub_offset = 0;
      eh->target_value = 0;
      eh->target_section = NULL;
    }

  return entry;
}

/* Add a new stub entry to the stub hash.  Not all fields of the new
   stub entry are initialised.  */

static struct elf32_m68hc11_stub_hash_entry *
m68hc12_add_stub (const char *stub_name, asection *section,
		  struct m68hc11_elf_link_hash_table *htab)
{
  struct elf32_m68hc11_stub_hash_entry *stub_entry;

  /* Enter this entry into the linker stub hash table.  */
  stub_entry = m68hc12_stub_hash_lookup (htab->stub_hash_table, stub_name,
					 TRUE, FALSE);
  if (stub_entry == NULL)
    {
      /* xgettext:c-format */
      _bfd_error_handler (_("%pB: cannot create stub entry %s"),
			  section->owner, stub_name);
      return NULL;
    }

  if (htab->stub_section == 0)
    {
      htab->stub_section = (*htab->add_stub_section) (".tramp",
						      htab->tramp_section);
    }

  stub_entry->stub_sec = htab->stub_section;
  stub_entry->stub_offset = 0;
  return stub_entry;
}

/* Hook called by the linker routine which adds symbols from an object
   file.  We use it for identify far symbols and force a loading of
   the trampoline handler.  */

bfd_boolean
elf32_m68hc11_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
			       Elf_Internal_Sym *sym,
			       const char **namep ATTRIBUTE_UNUSED,
			       flagword *flagsp ATTRIBUTE_UNUSED,
			       asection **secp ATTRIBUTE_UNUSED,
			       bfd_vma *valp ATTRIBUTE_UNUSED)
{
  if (sym->st_other & STO_M68HC12_FAR)
    {
      struct elf_link_hash_entry *h;

      h = (struct elf_link_hash_entry *)
	bfd_link_hash_lookup (info->hash, "__far_trampoline",
			      FALSE, FALSE, FALSE);
      if (h == NULL)
	{
	  struct bfd_link_hash_entry* entry = NULL;

	  _bfd_generic_link_add_one_symbol (info, abfd,
					    "__far_trampoline",
					    BSF_GLOBAL,
					    bfd_und_section_ptr,
					    (bfd_vma) 0, (const char*) NULL,
					    FALSE, FALSE, &entry);
	}

    }
  return TRUE;
}

/* Merge non-visibility st_other attributes, STO_M68HC12_FAR and
   STO_M68HC12_INTERRUPT.  */

void
elf32_m68hc11_merge_symbol_attribute (struct elf_link_hash_entry *h,
				      const Elf_Internal_Sym *isym,
				      bfd_boolean definition,
				      bfd_boolean dynamic ATTRIBUTE_UNUSED)
{
  if (definition)
    h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
		| ELF_ST_VISIBILITY (h->other));
}

/* External entry points for sizing and building linker stubs.  */

/* Set up various things so that we can make a list of input sections
   for each output section included in the link.  Returns -1 on error,
   0 when no stubs will be needed, and 1 on success.  */

int
elf32_m68hc11_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
{
  bfd *input_bfd;
  unsigned int bfd_count;
  unsigned int top_id, top_index;
  asection *section;
  asection **input_list, **list;
  bfd_size_type amt;
  asection *text_section;
  struct m68hc11_elf_link_hash_table *htab;

  htab = m68hc11_elf_hash_table (info);
  if (htab == NULL)
    return -1;

  if (bfd_get_flavour (info->output_bfd) != bfd_target_elf_flavour)
    return 0;

  /* Count the number of input BFDs and find the top input section id.
     Also search for an existing ".tramp" section so that we know
     where generated trampolines must go.  Default to ".text" if we
     can't find it.  */
  htab->tramp_section = 0;
  text_section = 0;
  for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
       input_bfd != NULL;
       input_bfd = input_bfd->link.next)
    {
      bfd_count += 1;
      for (section = input_bfd->sections;
	   section != NULL;
	   section = section->next)
	{
	  const char* name = bfd_get_section_name (input_bfd, section);

	  if (!strcmp (name, ".tramp"))
	    htab->tramp_section = section;

	  if (!strcmp (name, ".text"))
	    text_section = section;

	  if (top_id < section->id)
	    top_id = section->id;
	}
    }
  htab->bfd_count = bfd_count;
  if (htab->tramp_section == 0)
    htab->tramp_section = text_section;

  /* We can't use output_bfd->section_count here to find the top output
     section index as some sections may have been removed, and
     strip_excluded_output_sections doesn't renumber the indices.  */
  for (section = output_bfd->sections, top_index = 0;
       section != NULL;
       section = section->next)
    {
      if (top_index < section->index)
	top_index = section->index;
    }

  htab->top_index = top_index;
  amt = sizeof (asection *) * (top_index + 1);
  input_list = (asection **) bfd_malloc (amt);
  htab->input_list = input_list;
  if (input_list == NULL)
    return -1;

  /* For sections we aren't interested in, mark their entries with a
     value we can check later.  */
  list = input_list + top_index;
  do
    *list = bfd_abs_section_ptr;
  while (list-- != input_list);

  for (section = output_bfd->sections;
       section != NULL;
       section = section->next)
    {
      if ((section->flags & SEC_CODE) != 0)
	input_list[section->index] = NULL;
    }

  return 1;
}

/* Determine and set the size of the stub section for a final link.

   The basic idea here is to examine all the relocations looking for
   PC-relative calls to a target that is unreachable with a "bl"
   instruction.  */

bfd_boolean
elf32_m68hc11_size_stubs (bfd *output_bfd, bfd *stub_bfd,
			  struct bfd_link_info *info,
			  asection * (*add_stub_section) (const char*, asection*))
{
  bfd *input_bfd;
  asection *section;
  Elf_Internal_Sym *local_syms, **all_local_syms;
  unsigned int bfd_indx, bfd_count;
  bfd_size_type amt;
  asection *stub_sec;
  struct m68hc11_elf_link_hash_table *htab = m68hc11_elf_hash_table (info);

  if (htab == NULL)
    return FALSE;

  /* Stash our params away.  */
  htab->stub_bfd = stub_bfd;
  htab->add_stub_section = add_stub_section;

  /* Count the number of input BFDs and find the top input section id.  */
  for (input_bfd = info->input_bfds, bfd_count = 0;
       input_bfd != NULL;
       input_bfd = input_bfd->link.next)
    bfd_count += 1;

  /* We want to read in symbol extension records only once.  To do this
     we need to read in the local symbols in parallel and save them for
     later use; so hold pointers to the local symbols in an array.  */
  amt = sizeof (Elf_Internal_Sym *) * bfd_count;
  all_local_syms = (Elf_Internal_Sym **) bfd_zmalloc (amt);
  if (all_local_syms == NULL)
    return FALSE;

  /* Walk over all the input BFDs, swapping in local symbols.  */
  for (input_bfd = info->input_bfds, bfd_indx = 0;
       input_bfd != NULL;
       input_bfd = input_bfd->link.next, bfd_indx++)
    {
      Elf_Internal_Shdr *symtab_hdr;

      /* We'll need the symbol table in a second.  */
      symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
      if (symtab_hdr->sh_info == 0)
	continue;

      /* We need an array of the local symbols attached to the input bfd.  */
      local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
      if (local_syms == NULL)
	{
	  local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
					     symtab_hdr->sh_info, 0,
					     NULL, NULL, NULL);
	  /* Cache them for elf_link_input_bfd.  */
	  symtab_hdr->contents = (unsigned char *) local_syms;
	}
      if (local_syms == NULL)
	{
	  free (all_local_syms);
	  return FALSE;
	}

      all_local_syms[bfd_indx] = local_syms;
    }

  for (input_bfd = info->input_bfds, bfd_indx = 0;
       input_bfd != NULL;
       input_bfd = input_bfd->link.next, bfd_indx++)
    {
      Elf_Internal_Shdr *symtab_hdr;
      struct elf_link_hash_entry ** sym_hashes;

      sym_hashes = elf_sym_hashes (input_bfd);

      /* We'll need the symbol table in a second.  */
      symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
      if (symtab_hdr->sh_info == 0)
	continue;

      local_syms = all_local_syms[bfd_indx];

      /* Walk over each section attached to the input bfd.  */
      for (section = input_bfd->sections;
	   section != NULL;
	   section = section->next)
	{
	  Elf_Internal_Rela *internal_relocs, *irelaend, *irela;

	  /* If there aren't any relocs, then there's nothing more
	     to do.  */
	  if ((section->flags & SEC_RELOC) == 0
	      || section->reloc_count == 0)
	    continue;

	  /* If this section is a link-once section that will be
	     discarded, then don't create any stubs.  */
	  if (section->output_section == NULL
	      || section->output_section->owner != output_bfd)
	    continue;

	  /* Get the relocs.  */
	  internal_relocs
	    = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
					 (Elf_Internal_Rela *) NULL,
					 info->keep_memory);
	  if (internal_relocs == NULL)
	    goto error_ret_free_local;

	  /* Now examine each relocation.  */
	  irela = internal_relocs;
	  irelaend = irela + section->reloc_count;
	  for (; irela < irelaend; irela++)
	    {
	      unsigned int r_type, r_indx;
	      struct elf32_m68hc11_stub_hash_entry *stub_entry;
	      asection *sym_sec;
	      bfd_vma sym_value;
	      struct elf_link_hash_entry *hash;
	      const char *stub_name;
	      Elf_Internal_Sym *sym;

	      r_type = ELF32_R_TYPE (irela->r_info);

	      /* Only look at 16-bit relocs.  */
	      if (r_type != (unsigned int) R_M68HC11_16)
		continue;

	      /* Now determine the call target, its name, value,
		 section.  */
	      r_indx = ELF32_R_SYM (irela->r_info);
	      if (r_indx < symtab_hdr->sh_info)
		{
		  /* It's a local symbol.  */
		  Elf_Internal_Shdr *hdr;
		  bfd_boolean is_far;

		  sym = local_syms + r_indx;
		  is_far = (sym && (sym->st_other & STO_M68HC12_FAR));
		  if (!is_far)
		    continue;

		  if (sym->st_shndx >= elf_numsections (input_bfd))
		    sym_sec = NULL;
		  else
		    {
		      hdr = elf_elfsections (input_bfd)[sym->st_shndx];
		      sym_sec = hdr->bfd_section;
		    }
		  stub_name = (bfd_elf_string_from_elf_section
			       (input_bfd, symtab_hdr->sh_link,
				sym->st_name));
		  sym_value = sym->st_value;
		  hash = NULL;
		}
	      else
		{
		  /* It's an external symbol.  */
		  int e_indx;

		  e_indx = r_indx - symtab_hdr->sh_info;
		  hash = (struct elf_link_hash_entry *)
		    (sym_hashes[e_indx]);

		  while (hash->root.type == bfd_link_hash_indirect
			 || hash->root.type == bfd_link_hash_warning)
		    hash = ((struct elf_link_hash_entry *)
			    hash->root.u.i.link);

		  if (hash->root.type == bfd_link_hash_defined
		      || hash->root.type == bfd_link_hash_defweak
		      || hash->root.type == bfd_link_hash_new)
		    {
		      if (!(hash->other & STO_M68HC12_FAR))
			continue;
		    }
		  else if (hash->root.type == bfd_link_hash_undefweak)
		    {
		      continue;
		    }
		  else if (hash->root.type == bfd_link_hash_undefined)
		    {
		      continue;
		    }
		  else
		    {
		      bfd_set_error (bfd_error_bad_value);
		      goto error_ret_free_internal;
		    }
		  sym_sec = hash->root.u.def.section;
		  sym_value = hash->root.u.def.value;
		  stub_name = hash->root.root.string;
		}

	      if (!stub_name)
		goto error_ret_free_internal;

	      stub_entry = m68hc12_stub_hash_lookup
		(htab->stub_hash_table,
		 stub_name,
		 FALSE, FALSE);
	      if (stub_entry == NULL)
		{
		  if (add_stub_section == 0)
		    continue;

		  stub_entry = m68hc12_add_stub (stub_name, section, htab);
		  if (stub_entry == NULL)
		    {
		    error_ret_free_internal:
		      if (elf_section_data (section)->relocs == NULL)
			free (internal_relocs);
		      goto error_ret_free_local;
		    }
		}

	      stub_entry->target_value = sym_value;
	      stub_entry->target_section = sym_sec;
	    }

	  /* We're done with the internal relocs, free them.  */
	  if (elf_section_data (section)->relocs == NULL)
	    free (internal_relocs);
	}
    }

  if (add_stub_section)
    {
      /* OK, we've added some stubs.  Find out the new size of the
	 stub sections.  */
      for (stub_sec = htab->stub_bfd->sections;
	   stub_sec != NULL;
	   stub_sec = stub_sec->next)
	{
	  stub_sec->size = 0;
	}

      bfd_hash_traverse (htab->stub_hash_table, htab->size_one_stub, htab);
    }
  free (all_local_syms);
  return TRUE;

 error_ret_free_local:
  free (all_local_syms);
  return FALSE;
}

/* Export the trampoline addresses in the symbol table.  */
static bfd_boolean
m68hc11_elf_export_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
{
  struct bfd_link_info *info;
  struct m68hc11_elf_link_hash_table *htab;
  struct elf32_m68hc11_stub_hash_entry *stub_entry;
  char* name;
  bfd_boolean result;

  info = (struct bfd_link_info *) in_arg;
  htab = m68hc11_elf_hash_table (info);
  if (htab == NULL)
    return FALSE;

  /* Massage our args to the form they really have.  */
  stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry;

  /* Generate the trampoline according to HC11 or HC12.  */
  result = (* htab->build_one_stub) (gen_entry, in_arg);

  /* Make a printable name that does not conflict with the real function.  */
  name = concat ("tramp.", stub_entry->root.string, NULL);

  /* Export the symbol for debugging/disassembling.  */
  m68hc11_elf_set_symbol (htab->stub_bfd, info, name,
			  stub_entry->stub_offset,
			  stub_entry->stub_sec);
  free (name);
  return result;
}

/* Export a symbol or set its value and section.  */
static void
m68hc11_elf_set_symbol (bfd *abfd, struct bfd_link_info *info,
			const char *name, bfd_vma value, asection *sec)
{
  struct elf_link_hash_entry *h;

  h = (struct elf_link_hash_entry *)
    bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, FALSE);
  if (h == NULL)
    {
      _bfd_generic_link_add_one_symbol (info, abfd,
					name,
					BSF_GLOBAL,
					sec,
					value,
					(const char*) NULL,
					TRUE, FALSE, NULL);
    }
  else
    {
      h->root.type = bfd_link_hash_defined;
      h->root.u.def.value = value;
      h->root.u.def.section = sec;
    }
}


/* Build all the stubs associated with the current output file.  The
   stubs are kept in a hash table attached to the main linker hash
   table.  This function is called via m68hc12elf_finish in the
   linker.  */

bfd_boolean
elf32_m68hc11_build_stubs (bfd *abfd, struct bfd_link_info *info)
{
  asection *stub_sec;
  struct bfd_hash_table *table;
  struct m68hc11_elf_link_hash_table *htab;
  struct m68hc11_scan_param param;

  m68hc11_elf_get_bank_parameters (info);
  htab = m68hc11_elf_hash_table (info);
  if (htab == NULL)
    return FALSE;

  for (stub_sec = htab->stub_bfd->sections;
       stub_sec != NULL;
       stub_sec = stub_sec->next)
    {
      bfd_size_type size;

      /* Allocate memory to hold the linker stubs.  */
      size = stub_sec->size;
      stub_sec->contents = (unsigned char *) bfd_zalloc (htab->stub_bfd, size);
      if (stub_sec->contents == NULL && size != 0)
	return FALSE;
      stub_sec->size = 0;
    }

  /* Build the stubs as directed by the stub hash table.  */
  table = htab->stub_hash_table;
  bfd_hash_traverse (table, m68hc11_elf_export_one_stub, info);

  /* Scan the output sections to see if we use the memory banks.
     If so, export the symbols that define how the memory banks
     are mapped.  This is used by gdb and the simulator to obtain
     the information.  It can be used by programs to burn the eprom
     at the good addresses.  */
  param.use_memory_banks = FALSE;
  param.pinfo = &htab->pinfo;
  bfd_map_over_sections (abfd, scan_sections_for_abi, &param);
  if (param.use_memory_banks)
    {
      m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_START_NAME,
			      htab->pinfo.bank_physical,
			      bfd_abs_section_ptr);
      m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_VIRTUAL_NAME,
			      htab->pinfo.bank_virtual,
			      bfd_abs_section_ptr);
      m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_SIZE_NAME,
			      htab->pinfo.bank_size,
			      bfd_abs_section_ptr);
    }

  return TRUE;
}

void
m68hc11_elf_get_bank_parameters (struct bfd_link_info *info)
{
  unsigned i;
  struct m68hc11_page_info *pinfo;
  struct bfd_link_hash_entry *h;
  struct m68hc11_elf_link_hash_table *htab;

  htab = m68hc11_elf_hash_table (info);
  if (htab == NULL)
    return;

  pinfo = & htab->pinfo;
  if (pinfo->bank_param_initialized)
    return;

  pinfo->bank_virtual = M68HC12_BANK_VIRT;
  pinfo->bank_mask = M68HC12_BANK_MASK;
  pinfo->bank_physical = M68HC12_BANK_BASE;
  pinfo->bank_shift = M68HC12_BANK_SHIFT;
  pinfo->bank_size = 1 << M68HC12_BANK_SHIFT;

  h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_START_NAME,
			    FALSE, FALSE, TRUE);
  if (h != (struct bfd_link_hash_entry*) NULL
      && h->type == bfd_link_hash_defined)
    pinfo->bank_physical = (h->u.def.value
			    + h->u.def.section->output_section->vma
			    + h->u.def.section->output_offset);

  h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_VIRTUAL_NAME,
			    FALSE, FALSE, TRUE);
  if (h != (struct bfd_link_hash_entry*) NULL
      && h->type == bfd_link_hash_defined)
    pinfo->bank_virtual = (h->u.def.value
			   + h->u.def.section->output_section->vma
			   + h->u.def.section->output_offset);

  h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_SIZE_NAME,
			    FALSE, FALSE, TRUE);
  if (h != (struct bfd_link_hash_entry*) NULL
      && h->type == bfd_link_hash_defined)
    pinfo->bank_size = (h->u.def.value
			+ h->u.def.section->output_section->vma
			+ h->u.def.section->output_offset);

  pinfo->bank_shift = 0;
  for (i = pinfo->bank_size; i != 0; i >>= 1)
    pinfo->bank_shift++;
  pinfo->bank_shift--;
  pinfo->bank_mask = (1 << pinfo->bank_shift) - 1;
  pinfo->bank_physical_end = pinfo->bank_physical + pinfo->bank_size;
  pinfo->bank_param_initialized = 1;

  h = bfd_link_hash_lookup (info->hash, "__far_trampoline", FALSE,
			    FALSE, TRUE);
  if (h != (struct bfd_link_hash_entry*) NULL
      && h->type == bfd_link_hash_defined)
    pinfo->trampoline_addr = (h->u.def.value
			      + h->u.def.section->output_section->vma
			      + h->u.def.section->output_offset);
}

/* Return 1 if the address is in banked memory.
   This can be applied to a virtual address and to a physical address.  */
int
m68hc11_addr_is_banked (struct m68hc11_page_info *pinfo, bfd_vma addr)
{
  if (addr >= pinfo->bank_virtual)
    return 1;

  if (addr >= pinfo->bank_physical && addr <= pinfo->bank_physical_end)
    return 1;

  return 0;
}

/* Return the physical address seen by the processor, taking
   into account banked memory.  */
bfd_vma
m68hc11_phys_addr (struct m68hc11_page_info *pinfo, bfd_vma addr)
{
  if (addr < pinfo->bank_virtual)
    return addr;

  /* Map the address to the memory bank.  */
  addr -= pinfo->bank_virtual;
  addr &= pinfo->bank_mask;
  addr += pinfo->bank_physical;
  return addr;
}

/* Return the page number corresponding to an address in banked memory.  */
bfd_vma
m68hc11_phys_page (struct m68hc11_page_info *pinfo, bfd_vma addr)
{
  if (addr < pinfo->bank_virtual)
    return 0;

  /* Map the address to the memory bank.  */
  addr -= pinfo->bank_virtual;
  addr >>= pinfo->bank_shift;
  addr &= 0x0ff;
  return addr;
}

/* This function is used for relocs which are only used for relaxing,
   which the linker should otherwise ignore.  */

bfd_reloc_status_type
m68hc11_elf_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED,
			  arelent *reloc_entry,
			  asymbol *symbol ATTRIBUTE_UNUSED,
			  void *data ATTRIBUTE_UNUSED,
			  asection *input_section,
			  bfd *output_bfd,
			  char **error_message ATTRIBUTE_UNUSED)
{
  if (output_bfd != NULL)
    reloc_entry->address += input_section->output_offset;
  return bfd_reloc_ok;
}

bfd_reloc_status_type
m68hc11_elf_special_reloc (bfd *abfd ATTRIBUTE_UNUSED,
			   arelent *reloc_entry,
			   asymbol *symbol,
			   void *data ATTRIBUTE_UNUSED,
			   asection *input_section,
			   bfd *output_bfd,
			   char **error_message ATTRIBUTE_UNUSED)
{
  if (output_bfd != (bfd *) NULL
      && (symbol->flags & BSF_SECTION_SYM) == 0
      && (! reloc_entry->howto->partial_inplace
	  || reloc_entry->addend == 0))
    {
      reloc_entry->address += input_section->output_offset;
      return bfd_reloc_ok;
    }

  if (output_bfd != NULL)
    return bfd_reloc_continue;

  if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
    return bfd_reloc_outofrange;

  abort();
}

/* Look through the relocs for a section during the first phase.
   Since we don't do .gots or .plts, we just need to consider the
   virtual table relocs for gc.  */

bfd_boolean
elf32_m68hc11_check_relocs (bfd *abfd, struct bfd_link_info *info,
			    asection *sec, const Elf_Internal_Rela *relocs)
{
  Elf_Internal_Shdr *		symtab_hdr;
  struct elf_link_hash_entry ** sym_hashes;
  const Elf_Internal_Rela *	rel;
  const Elf_Internal_Rela *	rel_end;

  if (bfd_link_relocatable (info))
    return TRUE;

  symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
  sym_hashes = elf_sym_hashes (abfd);
  rel_end = relocs + sec->reloc_count;

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

      r_symndx = ELF32_R_SYM (rel->r_info);

      if (r_symndx < symtab_hdr->sh_info)
	h = NULL;
      else
	{
	  h = sym_hashes [r_symndx - symtab_hdr->sh_info];
	  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;
	}

      switch (ELF32_R_TYPE (rel->r_info))
	{
	/* This relocation describes the C++ object vtable hierarchy.
	   Reconstruct it for later use during GC.  */
	case R_M68HC11_GNU_VTINHERIT:
	  if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
	    return FALSE;
	  break;

	/* This relocation describes which C++ vtable entries are actually
	   used.  Record for later use during GC.  */
	case R_M68HC11_GNU_VTENTRY:
	  BFD_ASSERT (h != NULL);
	  if (h != NULL
	      && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
	    return FALSE;
	  break;
	}
    }

  return TRUE;
}

/* Relocate a 68hc11/68hc12 ELF section.  */
bfd_boolean
elf32_m68hc11_relocate_section (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, *relend;
  const char *name = NULL;
  struct m68hc11_page_info *pinfo;
  const struct elf_backend_data * const ebd = get_elf_backend_data (input_bfd);
  struct m68hc11_elf_link_hash_table *htab;
  unsigned long e_flags;

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

  htab = m68hc11_elf_hash_table (info);
  if (htab == NULL)
    return FALSE;

  /* Get memory bank parameters.  */
  m68hc11_elf_get_bank_parameters (info);

  pinfo = & htab->pinfo;
  rel = relocs;
  relend = relocs + input_section->reloc_count;

  for (; rel < relend; rel++)
    {
      int r_type;
      arelent arel;
      reloc_howto_type *howto;
      unsigned long r_symndx;
      Elf_Internal_Sym *sym;
      asection *sec;
      bfd_vma relocation = 0;
      bfd_reloc_status_type r = bfd_reloc_undefined;
      bfd_vma phys_page;
      bfd_vma phys_addr;
      bfd_vma insn_addr;
      bfd_vma insn_page;
      bfd_boolean is_far = FALSE;
      bfd_boolean is_xgate_symbol = FALSE;
      bfd_boolean is_section_symbol = FALSE;
      struct elf_link_hash_entry *h;
      bfd_vma val;
      const char * msg;
      char * buf;

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

      if (r_type == R_M68HC11_GNU_VTENTRY
	  || r_type == R_M68HC11_GNU_VTINHERIT)
	continue;

      (*ebd->elf_info_to_howto_rel) (input_bfd, &arel, rel);
      howto = arel.howto;

      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);
	  is_far = (sym && (sym->st_other & STO_M68HC12_FAR));
	  is_xgate_symbol = (sym && (sym->st_target_internal));
	  is_section_symbol = ELF_ST_TYPE (sym->st_info) & STT_SECTION;
	}
      else
	{
	  bfd_boolean unresolved_reloc, warned, ignored;

	  RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
				   r_symndx, symtab_hdr, sym_hashes,
				   h, sec, relocation, unresolved_reloc,
				   warned, ignored);

	  is_far = (h && (h->other & STO_M68HC12_FAR));
	  is_xgate_symbol = (h && (h->target_internal));
	}

      if (sec != NULL && discarded_section (sec))
	RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
					 rel, 1, relend, howto, 0, contents);

      if (bfd_link_relocatable (info))
	{
	  /* This is a relocatable 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 (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
	    rel->r_addend += sec->output_offset;
	  continue;
	}

      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);
	}

      if (is_far && ELF32_R_TYPE (rel->r_info) == R_M68HC11_16)
	{
	  struct elf32_m68hc11_stub_hash_entry* stub;

	  stub = m68hc12_stub_hash_lookup (htab->stub_hash_table,
					   name, FALSE, FALSE);
	  if (stub)
	    {
	      relocation = stub->stub_offset
		+ stub->stub_sec->output_section->vma
		+ stub->stub_sec->output_offset;
	      is_far = FALSE;
	    }
	}

      /* Do the memory bank mapping.  */
      phys_addr = m68hc11_phys_addr (pinfo, relocation + rel->r_addend);
      phys_page = m68hc11_phys_page (pinfo, relocation + rel->r_addend);
      switch (r_type)
	{
	case R_M68HC12_LO8XG:
	  /* This relocation is specific to XGATE IMM16 calls and will precede
	     a HI8. tc-m68hc11 only generates them in pairs.
	     Leave the relocation to the HI8XG step.  */
	  r = bfd_reloc_ok;
	  r_type = R_M68HC11_NONE;
	  break;

	case R_M68HC12_HI8XG:
	  /* This relocation is specific to XGATE IMM16 calls and must follow
	     a LO8XG. Does not actually check that it was a LO8XG.
	     Adjusts high and low bytes.  */
	  relocation = phys_addr;
	  if ((e_flags & E_M68HC11_XGATE_RAMOFFSET)
	      && (relocation >= 0x2000))
	    relocation += 0xc000; /* HARDCODED RAM offset for XGATE.  */

	  /* Fetch 16 bit value including low byte in previous insn.  */
	  val = (bfd_get_8 (input_bfd, (bfd_byte*) contents + rel->r_offset) << 8)
	    | bfd_get_8 (input_bfd, (bfd_byte*) contents + rel->r_offset - 2);

	  /* Add on value to preserve carry, then write zero to high byte.  */
	  relocation += val;

	  /* Write out top byte.  */
	  bfd_put_8 (input_bfd, (relocation >> 8) & 0xff,
		     (bfd_byte*) contents + rel->r_offset);

	  /* Write out low byte to previous instruction.  */
	  bfd_put_8 (input_bfd, relocation & 0xff,
		     (bfd_byte*) contents + rel->r_offset - 2);

	  /* Mark as relocation completed.  */
	  r = bfd_reloc_ok;
	  r_type = R_M68HC11_NONE;
	  break;

	/* The HI8 and LO8 relocs are generated by %hi(expr) %lo(expr)
	   assembler directives. %hi does not support carry.  */
	case R_M68HC11_HI8:
	case R_M68HC11_LO8:
	  relocation = phys_addr;
	  break;

	case R_M68HC11_24:
	  /* Reloc used by 68HC12 call instruction.  */
	  bfd_put_16 (input_bfd, phys_addr,
		      (bfd_byte*) contents + rel->r_offset);
	  bfd_put_8 (input_bfd, phys_page,
		     (bfd_byte*) contents + rel->r_offset + 2);
	  r = bfd_reloc_ok;
	  r_type = R_M68HC11_NONE;
	  break;

	case R_M68HC11_NONE:
	  r = bfd_reloc_ok;
	  break;

	case R_M68HC11_LO16:
	  /* Reloc generated by %addr(expr) gas to obtain the
	     address as mapped in the memory bank window.  */
	  relocation = phys_addr;
	  break;

	case R_M68HC11_PAGE:
	  /* Reloc generated by %page(expr) gas to obtain the
	     page number associated with the address.  */
	  relocation = phys_page;
	  break;

	case R_M68HC11_16:
	  /* Get virtual address of instruction having the relocation.  */
	  if (is_far)
	    {
	      msg = _("Reference to the far symbol `%s' using a wrong "
		      "relocation may result in incorrect execution");
	      buf = xmalloc (strlen (msg) + strlen (name) + 10);
	      sprintf (buf, msg, name);

	      (*info->callbacks->warning)
		(info, buf, name, input_bfd, NULL, rel->r_offset);
	      free (buf);
	    }

	  /* Get virtual address of instruction having the relocation.  */
	  insn_addr = input_section->output_section->vma
	    + input_section->output_offset
	    + rel->r_offset;

	  insn_page = m68hc11_phys_page (pinfo, insn_addr);

	 /* If we are linking an S12 instruction against an XGATE symbol, we
	    need to change the offset of the symbol value so that it's correct
	    from the S12's perspective.  */
	  if (is_xgate_symbol)
	    {
	      /* The ram in the global space is mapped to 0x2000 in the 16-bit
		 address space for S12 and 0xE000 in the 16-bit address space
		 for XGATE.  */
	      if (relocation >= 0xE000)
		{
		  /* We offset the address by the difference
		     between these two mappings.  */
		  relocation -= 0xC000;
		  break;
		}
	      else
		{
		  msg = _("XGATE address (%lx) is not within shared RAM"
			  "(0xE000-0xFFFF), therefore you must manually offset "
			  "the address, and possibly manage the page, in your "
			  "code.");
		  buf = xmalloc (strlen (msg) + 128);
		  sprintf (buf, msg, phys_addr);
		  (*info->callbacks->warning) (info, buf, name, input_bfd,
					       input_section, insn_addr);
		  free (buf);
		  break;
		}
	    }

	  if (m68hc11_addr_is_banked (pinfo, relocation + rel->r_addend)
	      && m68hc11_addr_is_banked (pinfo, insn_addr)
	      && phys_page != insn_page && !(e_flags & E_M68HC11_NO_BANK_WARNING))
	    {
	      /* xgettext:c-format */
	      msg = _("banked address [%lx:%04lx] (%lx) is not in the same bank "
		      "as current banked address [%lx:%04lx] (%lx)");
	      buf = xmalloc (strlen (msg) + 128);
	      sprintf (buf, msg, phys_page, phys_addr,
		       (long) (relocation + rel->r_addend),
		       insn_page, m68hc11_phys_addr (pinfo, insn_addr),
		       (long) (insn_addr));
	      (*info->callbacks->warning) (info, buf, name, input_bfd,
					   input_section, rel->r_offset);
	      free (buf);
	      break;
	    }

	  if (phys_page != 0 && insn_page == 0)
	    {
	      /* xgettext:c-format */
	      msg = _("reference to a banked address [%lx:%04lx] in the "
		      "normal address space at %04lx");
	      buf = xmalloc (strlen (msg) + 128);
	      sprintf (buf, msg, phys_page, phys_addr, insn_addr);
	      (*info->callbacks->warning) (info, buf, name, input_bfd,
					   input_section, insn_addr);
	      free (buf);
	      relocation = phys_addr;
	      break;
	    }

	  /* If this is a banked address use the phys_addr so that
	     we stay in the banked window.  */
	  if (m68hc11_addr_is_banked (pinfo, relocation + rel->r_addend))
	    relocation = phys_addr;
	  break;
	}

      /* If we are linking an XGATE instruction against an S12 symbol, we
	 need to change the offset of the symbol value so that it's correct
	 from the XGATE's perspective.  */
      if (!strcmp (howto->name, "R_XGATE_IMM8_LO")
	  || !strcmp (howto->name, "R_XGATE_IMM8_HI"))
	{
	  /* We can only offset S12 addresses that lie within the non-paged
	     area of RAM.  */
	  if (!is_xgate_symbol && !is_section_symbol)
	    {
	      /* The ram in the global space is mapped to 0x2000 and stops at
		 0x4000 in the 16-bit address space for S12 and 0xE000 in the
		 16-bit address space for XGATE.  */
	      if (relocation >= 0x2000 && relocation < 0x4000)
		 /* We offset the address by the difference
		   between these two mappings.  */
		relocation += 0xC000;
	      else
		{
		  /* Get virtual address of instruction having the relocation.  */
		  insn_addr = input_section->output_section->vma
		      + input_section->output_offset + rel->r_offset;

		  msg = _("S12 address (%lx) is not within shared RAM"
		      "(0x2000-0x4000), therefore you must manually "
		      "offset the address in your code");
		  buf = xmalloc (strlen (msg) + 128);
		  sprintf (buf, msg, phys_addr);
		  (*info->callbacks->warning) (info, buf, name, input_bfd,
					       input_section, insn_addr);
		  free (buf);
		  break;
		}
	    }
	}

      if (r_type != R_M68HC11_NONE)
	{
	  if ((r_type == R_M68HC12_PCREL_9) || (r_type == R_M68HC12_PCREL_10))
	    r = _bfd_final_link_relocate (howto, input_bfd, input_section,
				      contents, rel->r_offset,
				      relocation - 2, rel->r_addend);
	  else
	    r = _bfd_final_link_relocate (howto, input_bfd, input_section,
					  contents, rel->r_offset,
					  relocation, rel->r_addend);
	}

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

	    case bfd_reloc_undefined:
	      (*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");
	      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:
	      (*info->callbacks->warning) (info, msg, name, input_bfd,
					   input_section, rel->r_offset);
	      break;
	    }
	}
    }

  return TRUE;
}



/* Set and control ELF flags in ELF header.  */

bfd_boolean
_bfd_m68hc11_elf_set_private_flags (bfd *abfd, flagword flags)
{
  BFD_ASSERT (!elf_flags_init (abfd)
	      || elf_elfheader (abfd)->e_flags == flags);

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

/* Merge backend specific data from an object file to the output
   object file when linking.  */

bfd_boolean
_bfd_m68hc11_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
{
  bfd *obfd = info->output_bfd;
  flagword old_flags;
  flagword new_flags;
  bfd_boolean ok = TRUE;

  /* Check if we have the same endianness */
  if (!_bfd_generic_verify_endian_match (ibfd, info))
    return FALSE;

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

  new_flags = elf_elfheader (ibfd)->e_flags;
  elf_elfheader (obfd)->e_flags |= new_flags & EF_M68HC11_ABI;
  old_flags = elf_elfheader (obfd)->e_flags;

  if (! elf_flags_init (obfd))
    {
      elf_flags_init (obfd) = TRUE;
      elf_elfheader (obfd)->e_flags = new_flags;
      elf_elfheader (obfd)->e_ident[EI_CLASS]
	= elf_elfheader (ibfd)->e_ident[EI_CLASS];

      if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
	  && bfd_get_arch_info (obfd)->the_default)
	{
	  if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
				   bfd_get_mach (ibfd)))
	    return FALSE;
	}

      return TRUE;
    }

  /* Check ABI compatibility.  */
  if ((new_flags & E_M68HC11_I32) != (old_flags & E_M68HC11_I32))
    {
      _bfd_error_handler
	(_("%pB: linking files compiled for 16-bit integers (-mshort) "
	   "and others for 32-bit integers"), ibfd);
      ok = FALSE;
    }
  if ((new_flags & E_M68HC11_F64) != (old_flags & E_M68HC11_F64))
    {
      _bfd_error_handler
	(_("%pB: linking files compiled for 32-bit double (-fshort-double) "
	   "and others for 64-bit double"), ibfd);
      ok = FALSE;
    }

  /* Processor compatibility.  */
  if (!EF_M68HC11_CAN_MERGE_MACH (new_flags, old_flags))
    {
      _bfd_error_handler
	(_("%pB: linking files compiled for HCS12 with "
	   "others compiled for HC12"), ibfd);
      ok = FALSE;
    }
  new_flags = ((new_flags & ~EF_M68HC11_MACH_MASK)
	       | (EF_M68HC11_MERGE_MACH (new_flags, old_flags)));

  elf_elfheader (obfd)->e_flags = new_flags;

  new_flags &= ~(EF_M68HC11_ABI | EF_M68HC11_MACH_MASK);
  old_flags &= ~(EF_M68HC11_ABI | EF_M68HC11_MACH_MASK);

  /* Warn about any other mismatches */
  if (new_flags != old_flags)
    {
      _bfd_error_handler
	/* xgettext:c-format */
	(_("%pB: uses different e_flags (%#x) fields than previous modules (%#x)"),
	 ibfd, new_flags, old_flags);
      ok = FALSE;
    }

  if (! ok)
    {
      bfd_set_error (bfd_error_bad_value);
      return FALSE;
    }

  return TRUE;
}

bfd_boolean
_bfd_m68hc11_elf_print_private_bfd_data (bfd *abfd, void *ptr)
{
  FILE *file = (FILE *) ptr;

  BFD_ASSERT (abfd != NULL && ptr != NULL);

  /* Print normal ELF private data.  */
  _bfd_elf_print_private_bfd_data (abfd, ptr);

  /* xgettext:c-format */
  fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);

  if (elf_elfheader (abfd)->e_flags & E_M68HC11_I32)
    fprintf (file, _("[abi=32-bit int, "));
  else
    fprintf (file, _("[abi=16-bit int, "));

  if (elf_elfheader (abfd)->e_flags & E_M68HC11_F64)
    fprintf (file, _("64-bit double, "));
  else
    fprintf (file, _("32-bit double, "));

  if (strcmp (bfd_get_target (abfd), "elf32-m68hc11") == 0)
    fprintf (file, _("cpu=HC11]"));
  else if (elf_elfheader (abfd)->e_flags & EF_M68HCS12_MACH)
    fprintf (file, _("cpu=HCS12]"));
  else
    fprintf (file, _("cpu=HC12]"));

  if (elf_elfheader (abfd)->e_flags & E_M68HC12_BANKS)
    fprintf (file, _(" [memory=bank-model]"));
  else
    fprintf (file, _(" [memory=flat]"));

  if (elf_elfheader (abfd)->e_flags & E_M68HC11_XGATE_RAMOFFSET)
    fprintf (file, _(" [XGATE RAM offsetting]"));

  fputc ('\n', file);

  return TRUE;
}

static void scan_sections_for_abi (bfd *abfd ATTRIBUTE_UNUSED,
				   asection *asect, void *arg)
{
  struct m68hc11_scan_param* p = (struct m68hc11_scan_param*) arg;

  if (asect->vma >= p->pinfo->bank_virtual)
    p->use_memory_banks = TRUE;
}

/* Tweak the OSABI field of the elf header.  */

void
elf32_m68hc11_post_process_headers (bfd *abfd, struct bfd_link_info *link_info)
{
  struct m68hc11_scan_param param;
  struct m68hc11_elf_link_hash_table *htab;

  if (link_info == NULL)
    return;

  htab = m68hc11_elf_hash_table (link_info);
  if (htab == NULL)
    return;

  m68hc11_elf_get_bank_parameters (link_info);

  param.use_memory_banks = FALSE;
  param.pinfo = & htab->pinfo;

  bfd_map_over_sections (abfd, scan_sections_for_abi, &param);

  if (param.use_memory_banks)
    {
      Elf_Internal_Ehdr * i_ehdrp;

      i_ehdrp = elf_elfheader (abfd);
      i_ehdrp->e_flags |= E_M68HC12_BANKS;
    }
}