aboutsummaryrefslogtreecommitdiff
path: root/bfd/oasys.c
blob: 74305d73c162fe1cd67cb80bc95a2f20a6e87302 (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
/* BFD back-end for oasys objects.
   Copyright (C) 1990-2014 Free Software Foundation, Inc.
   Written by Steve Chamberlain of Cygnus Support, <sac@cygnus.com>.

   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.  */

#define UNDERSCORE_HACK 1
#include "sysdep.h"
#include "bfd.h"
#include "safe-ctype.h"
#include "libbfd.h"
#include "oasys.h"
#include "liboasys.h"
#include "libiberty.h"

/* Read in all the section data and relocation stuff too.  */

static bfd_boolean
oasys_read_record (bfd *abfd, oasys_record_union_type *record)
{
  bfd_size_type amt = sizeof (record->header);

  if (bfd_bread ((void *) record, amt, abfd) != amt)
    return FALSE;

  amt = record->header.length - sizeof (record->header);
  if ((long) amt <= 0)
    return TRUE;
  if (bfd_bread ((void *) ((char *) record + sizeof (record->header)), amt, abfd)
      != amt)
    return FALSE;
  return TRUE;
}

static size_t
oasys_string_length (oasys_record_union_type *record)
{
  return record->header.length
    - ((char *) record->symbol.name - (char *) record);
}

/* Slurp the symbol table by reading in all the records at the start file
   till we get to the first section record.

   We'll sort the symbolss into  two lists, defined and undefined. The
   undefined symbols will be placed into the table according to their
   refno.

   We do this by placing all undefined symbols at the front of the table
   moving in, and the defined symbols at the end of the table moving back.  */

static bfd_boolean
oasys_slurp_symbol_table (bfd *const abfd)
{
  oasys_record_union_type record;
  oasys_data_type *data = OASYS_DATA (abfd);
  bfd_boolean loop = TRUE;
  asymbol *dest_defined;
  asymbol *dest;
  char *string_ptr;
  bfd_size_type amt;

  if (data->symbols != NULL)
    return TRUE;

  /* Buy enough memory for all the symbols and all the names.  */
  amt = abfd->symcount;
  amt *= sizeof (asymbol);
  data->symbols = bfd_alloc (abfd, amt);

  amt = data->symbol_string_length;
#ifdef UNDERSCORE_HACK
  /* Buy 1 more char for each symbol to keep the underscore in.  */
  amt += abfd->symcount;
#endif
  data->strings = bfd_alloc (abfd, amt);

  if (!data->symbols || !data->strings)
    return FALSE;

  dest_defined = data->symbols + abfd->symcount - 1;

  string_ptr = data->strings;
  if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
    return FALSE;
  while (loop)
    {
      if (! oasys_read_record (abfd, &record))
	return FALSE;

      switch (record.header.type)
	{
	case oasys_record_is_header_enum:
	  break;
	case oasys_record_is_local_enum:
	case oasys_record_is_symbol_enum:
	  {
	    int flag = record.header.type == (int) oasys_record_is_local_enum ?
	    (BSF_LOCAL) : (BSF_GLOBAL | BSF_EXPORT);

	    size_t length = oasys_string_length (&record);
	    switch (record.symbol.relb & RELOCATION_TYPE_BITS)
	      {
	      case RELOCATION_TYPE_ABS:
		dest = dest_defined--;
		dest->section = bfd_abs_section_ptr;
		dest->flags = 0;

		break;
	      case RELOCATION_TYPE_REL:
		dest = dest_defined--;
		dest->section =
		  OASYS_DATA (abfd)->sections[record.symbol.relb &
					      RELOCATION_SECT_BITS];
		if (record.header.type == (int) oasys_record_is_local_enum)
		  {
		    dest->flags = BSF_LOCAL;
		    if (dest->section == (asection *) (~0))
		      {
			/* It seems that sometimes internal symbols are tied up, but
		       still get output, even though there is no
		       section */
			dest->section = 0;
		      }
		  }
		else
		  dest->flags = flag;
		break;
	      case RELOCATION_TYPE_UND:
		dest = data->symbols + H_GET_16 (abfd, record.symbol.refno);
		dest->section = bfd_und_section_ptr;
		break;
	      case RELOCATION_TYPE_COM:
		dest = dest_defined--;
		dest->name = string_ptr;
		dest->the_bfd = abfd;
		dest->section = bfd_com_section_ptr;
		break;
	      default:
		dest = dest_defined--;
		BFD_ASSERT (FALSE);
		break;
	      }
	    dest->name = string_ptr;
	    dest->the_bfd = abfd;
	    dest->udata.p = NULL;
	    dest->value = H_GET_32 (abfd, record.symbol.value);

#ifdef UNDERSCORE_HACK
	    if (record.symbol.name[0] != '_')
	      {
		string_ptr[0] = '_';
		string_ptr++;
	      }
#endif
	    memcpy (string_ptr, record.symbol.name, length);

	    string_ptr[length] = 0;
	    string_ptr += length + 1;
	  }
	  break;
	default:
	  loop = FALSE;
	}
    }
  return TRUE;
}

static long
oasys_get_symtab_upper_bound (bfd *const abfd)
{
  if (! oasys_slurp_symbol_table (abfd))
    return -1;

  return (abfd->symcount + 1) * (sizeof (oasys_symbol_type *));
}

extern const bfd_target oasys_vec;

static long
oasys_canonicalize_symtab (bfd *abfd, asymbol **location)
{
  asymbol *symbase;
  unsigned int counter;

  if (! oasys_slurp_symbol_table (abfd))
    return -1;

  symbase = OASYS_DATA (abfd)->symbols;
  for (counter = 0; counter < abfd->symcount; counter++)
    *(location++) = symbase++;

  *location = 0;
  return abfd->symcount;
}

/* Archive stuff.  */

static const bfd_target *
oasys_archive_p (bfd *abfd)
{
  oasys_archive_header_type header;
  oasys_extarchive_header_type header_ext;
  unsigned int i;
  file_ptr filepos;
  bfd_size_type amt;

  amt = sizeof (header_ext);
  if (bfd_seek (abfd, (file_ptr) 0, 0) != 0
      || bfd_bread ((void *) &header_ext, amt, abfd) != amt)
    {
      if (bfd_get_error () != bfd_error_system_call)
	bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  header.version = H_GET_32 (abfd, header_ext.version);
  header.mod_count = H_GET_32 (abfd, header_ext.mod_count);
  header.mod_tbl_offset = H_GET_32 (abfd, header_ext.mod_tbl_offset);
  header.sym_tbl_size = H_GET_32 (abfd, header_ext.sym_tbl_size);
  header.sym_count = H_GET_32 (abfd, header_ext.sym_count);
  header.sym_tbl_offset = H_GET_32 (abfd, header_ext.sym_tbl_offset);
  header.xref_count = H_GET_32 (abfd, header_ext.xref_count);
  header.xref_lst_offset = H_GET_32 (abfd, header_ext.xref_lst_offset);

  /* There isn't a magic number in an Oasys archive, so the best we
     can do to verify reasonableness is to make sure that the values in
     the header are too weird.  */

  if (header.version > 10000
      || header.mod_count > 10000
      || header.sym_count > 100000
      || header.xref_count > 100000)
    return NULL;

  /* That all worked, let's buy the space for the header and read in
     the headers.  */
  {
    oasys_ar_data_type *ar;
    oasys_module_info_type *module;
    oasys_module_table_type record;

    amt = sizeof (oasys_ar_data_type);
    ar = bfd_alloc (abfd, amt);

    amt = header.mod_count;
    amt *= sizeof (oasys_module_info_type);
    module = bfd_alloc (abfd, amt);

    if (!ar || !module)
      return NULL;

    abfd->tdata.oasys_ar_data = ar;
    ar->module = module;
    ar->module_count = header.mod_count;

    filepos = header.mod_tbl_offset;
    for (i = 0; i < header.mod_count; i++)
      {
	if (bfd_seek (abfd, filepos, SEEK_SET) != 0)
	  return NULL;

	/* There are two ways of specifying the archive header.  */
	  {
	    oasys_extmodule_table_type_b_type record_ext;

	    amt = sizeof (record_ext);
	    if (bfd_bread ((void *) &record_ext, amt, abfd) != amt)
	      return NULL;

	    record.mod_size = H_GET_32 (abfd, record_ext.mod_size);
	    record.file_offset = H_GET_32 (abfd, record_ext.file_offset);

	    record.dep_count = H_GET_32 (abfd, record_ext.dep_count);
	    record.depee_count = H_GET_32 (abfd, record_ext.depee_count);
	    record.sect_count = H_GET_32 (abfd, record_ext.sect_count);
	    record.module_name_size = H_GET_32 (abfd,
						record_ext.mod_name_length);

	    amt = record.module_name_size;
	    module[i].name = bfd_alloc (abfd, amt + 1);
	    if (!module[i].name)
	      return NULL;
	    if (bfd_bread ((void *) module[i].name, amt, abfd) != amt)
	      return NULL;
	    module[i].name[record.module_name_size] = 0;
	    filepos += (sizeof (record_ext)
			+ record.dep_count * 4
			+ record.module_name_size + 1);
	  }

	module[i].size = record.mod_size;
	module[i].pos = record.file_offset;
	module[i].abfd = 0;
      }
  }
  return abfd->xvec;
}

static bfd_boolean
oasys_mkobject (bfd *abfd)
{
  bfd_size_type amt = sizeof (oasys_data_type);

  abfd->tdata.oasys_obj_data = bfd_alloc (abfd, amt);

  return abfd->tdata.oasys_obj_data != NULL;
}

/* The howto table is build using the top two bits of a reloc byte to
   index into it. The bits are PCREL,WORD/LONG.  */

static reloc_howto_type howto_table[] =
{

  HOWTO (0, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 0, "abs16",   TRUE, 0x0000ffff, 0x0000ffff, FALSE),
  HOWTO (0, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "abs32",   TRUE, 0xffffffff, 0xffffffff, FALSE),
  HOWTO (0, 0, 1, 16, TRUE,  0, complain_overflow_signed,   0, "pcrel16", TRUE, 0x0000ffff, 0x0000ffff, FALSE),
  HOWTO (0, 0, 2, 32, TRUE,  0, complain_overflow_signed,   0, "pcrel32", TRUE, 0xffffffff, 0xffffffff, FALSE)
};

/* Read in all the section data and relocation stuff too.  */

static bfd_boolean
oasys_slurp_section_data (bfd *const abfd)
{
  oasys_record_union_type record;
  oasys_data_type *data = OASYS_DATA (abfd);
  bfd_boolean loop = TRUE;
  oasys_per_section_type *per;
  asection *s;
  bfd_size_type amt;

  /* See if the data has been slurped already.  */
  for (s = abfd->sections; s != NULL; s = s->next)
    {
      per = oasys_per_section (s);
      if (per->initialized)
	return TRUE;
    }

  if (data->first_data_record == 0)
    return TRUE;

  if (bfd_seek (abfd, data->first_data_record, SEEK_SET) != 0)
    return FALSE;

  while (loop)
    {
      if (! oasys_read_record (abfd, &record))
	return FALSE;

      switch (record.header.type)
	{
	case oasys_record_is_header_enum:
	  break;
	case oasys_record_is_data_enum:
	  {
	    bfd_byte *src = record.data.data;
	    bfd_byte *end_src = ((bfd_byte *) & record) + record.header.length;
	    bfd_byte *dst_ptr;
	    bfd_byte *dst_base_ptr;
	    unsigned int relbit;
	    unsigned int count;
	    asection *section =
	    data->sections[record.data.relb & RELOCATION_SECT_BITS];
	    bfd_vma dst_offset;

	    per = oasys_per_section (section);

	    if (! per->initialized)
	      {
		arelent **relpp;

		per->data = bfd_zalloc (abfd, section->size);
		if (!per->data)
		  return FALSE;
		relpp = &section->relocation;
		per->reloc_tail_ptr = (oasys_reloc_type **) relpp;
		per->had_vma = FALSE;
		per->initialized = TRUE;
		section->reloc_count = 0;
		section->flags = SEC_ALLOC;
	      }

	    dst_offset = H_GET_32 (abfd, record.data.addr);
	    if (! per->had_vma)
	      {
		/* Take the first vma we see as the base.  */
		section->vma = dst_offset;
		per->had_vma = TRUE;
	      }

	    dst_offset -= section->vma;

	    dst_base_ptr = oasys_per_section (section)->data;
	    dst_ptr = oasys_per_section (section)->data +
	      dst_offset;

	    if (src < end_src)
	      section->flags |= SEC_LOAD | SEC_HAS_CONTENTS;

	    while (src < end_src)
	      {
		unsigned char mod_byte = *src++;
		size_t gap = end_src - src;

		count = 8;
		if (mod_byte == 0 && gap >= 8)
		  {
		    dst_ptr[0] = src[0];
		    dst_ptr[1] = src[1];
		    dst_ptr[2] = src[2];
		    dst_ptr[3] = src[3];
		    dst_ptr[4] = src[4];
		    dst_ptr[5] = src[5];
		    dst_ptr[6] = src[6];
		    dst_ptr[7] = src[7];
		    dst_ptr += 8;
		    src += 8;
		  }
		else
		  {
		    for (relbit = 1; count-- != 0 && src < end_src; relbit <<= 1)
		      {
			if (relbit & mod_byte)
			  {
			    unsigned char reloc = *src;
			    /* This item needs to be relocated.  */
			    switch (reloc & RELOCATION_TYPE_BITS)
			      {
			      case RELOCATION_TYPE_ABS:
				break;

			      case RELOCATION_TYPE_REL:
				{
				  /* Relocate the item relative to the section.  */
				  oasys_reloc_type *r;

				  amt = sizeof (oasys_reloc_type);
				  r = bfd_alloc (abfd, amt);
				  if (!r)
				    return FALSE;
				  *(per->reloc_tail_ptr) = r;
				  per->reloc_tail_ptr = &r->next;
				  r->next = NULL;
				  /* Reference to undefined symbol.  */
				  src++;
				  /* There is no symbol.  */
				  r->symbol = 0;
				  /* Work out the howto.  */
				  abort ();
				  r->relent.address = dst_ptr - dst_base_ptr;
				  r->relent.howto = &howto_table[reloc >> 6];
				  r->relent.sym_ptr_ptr = NULL;
				  section->reloc_count++;

				  /* Fake up the data to look like
				     it's got the -ve pc in it, this
				     makes it much easier to convert
				     into other formats.  This is done
				     by hitting the addend.  */
				  if (r->relent.howto->pc_relative)
				    r->relent.addend -= dst_ptr - dst_base_ptr;
				}
				break;

			      case RELOCATION_TYPE_UND:
				{
				  oasys_reloc_type *r;

				  amt = sizeof (oasys_reloc_type);
				  r = bfd_alloc (abfd, amt);
				  if (!r)
				    return FALSE;
				  *(per->reloc_tail_ptr) = r;
				  per->reloc_tail_ptr = &r->next;
				  r->next = NULL;
				  /* Reference to undefined symbol.  */
				  src++;
				  /* Get symbol number.  */
				  r->symbol = (src[0] << 8) | src[1];
				  /* Work out the howto.  */
				  abort ();

				  r->relent.addend = 0;
				  r->relent.address = dst_ptr - dst_base_ptr;
				  r->relent.howto = &howto_table[reloc >> 6];
				  r->relent.sym_ptr_ptr = NULL;
				  section->reloc_count++;

				  src += 2;
				  /* Fake up the data to look like
				     it's got the -ve pc in it, this
				     makes it much easier to convert
				     into other formats.  This is done
				     by hitting the addend.  */
				  if (r->relent.howto->pc_relative)
				    r->relent.addend -= dst_ptr - dst_base_ptr;
				}
				break;
			      case RELOCATION_TYPE_COM:
				BFD_FAIL ();
			      }
			  }
			*dst_ptr++ = *src++;
		      }
		  }
	      }
	  }
	  break;
	case oasys_record_is_local_enum:
	case oasys_record_is_symbol_enum:
	case oasys_record_is_section_enum:
	  break;
	default:
	  loop = FALSE;
	}
    }

  return TRUE;

}

#define MAX_SECS 16

static const bfd_target *
oasys_object_p (bfd *abfd)
{
  oasys_data_type *oasys;
  oasys_data_type *save = OASYS_DATA (abfd);
  bfd_boolean loop = TRUE;
  bfd_boolean had_usefull = FALSE;

  abfd->tdata.oasys_obj_data = 0;
  oasys_mkobject (abfd);
  oasys = OASYS_DATA (abfd);
  memset ((void *) oasys->sections, 0xff, sizeof (oasys->sections));

  /* Point to the start of the file.  */
  if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
    goto fail;
  oasys->symbol_string_length = 0;

  /* Inspect the records, but only keep the section info -
     remember the size of the symbols.  */
  oasys->first_data_record = 0;
  while (loop)
    {
      oasys_record_union_type record;
      if (! oasys_read_record (abfd, &record))
	goto fail;
      if ((size_t) record.header.length < (size_t) sizeof (record.header))
	goto fail;

      switch ((oasys_record_enum_type) (record.header.type))
	{
	case oasys_record_is_header_enum:
	  had_usefull = TRUE;
	  break;
	case oasys_record_is_symbol_enum:
	case oasys_record_is_local_enum:
	  /* Count symbols and remember their size for a future malloc.  */
	  abfd->symcount++;
	  oasys->symbol_string_length += 1 + oasys_string_length (&record);
	  had_usefull = TRUE;
	  break;
	case oasys_record_is_section_enum:
	  {
	    asection *s;
	    char *buffer;
	    unsigned int section_number;

	    if (record.section.header.length != sizeof (record.section))
	      goto fail;

	    buffer = bfd_alloc (abfd, (bfd_size_type) 3);
	    if (!buffer)
	      goto fail;
	    section_number = record.section.relb & RELOCATION_SECT_BITS;
	    sprintf (buffer, "%u", section_number);
	    s = bfd_make_section (abfd, buffer);
	    oasys->sections[section_number] = s;
	    switch (record.section.relb & RELOCATION_TYPE_BITS)
	      {
	      case RELOCATION_TYPE_ABS:
	      case RELOCATION_TYPE_REL:
		break;
	      case RELOCATION_TYPE_UND:
	      case RELOCATION_TYPE_COM:
		BFD_FAIL ();
	      }

	    s->size = H_GET_32 (abfd, record.section.value);
	    s->vma = H_GET_32 (abfd, record.section.vma);
	    s->flags = 0;
	    had_usefull = TRUE;
	  }
	  break;
	case oasys_record_is_data_enum:
	  oasys->first_data_record = bfd_tell (abfd) - record.header.length;
	case oasys_record_is_debug_enum:
	case oasys_record_is_module_enum:
	case oasys_record_is_named_section_enum:
	case oasys_record_is_end_enum:
	  if (! had_usefull)
	    goto fail;
	  loop = FALSE;
	  break;
	default:
	  goto fail;
	}
    }
  oasys->symbols = NULL;

  /* Oasys support several architectures, but I can't see a simple way
     to discover which one is in a particular file - we'll guess.  */
  bfd_default_set_arch_mach (abfd, bfd_arch_m68k, 0);
  if (abfd->symcount != 0)
    abfd->flags |= HAS_SYMS;

  /* We don't know if a section has data until we've read it.  */
  oasys_slurp_section_data (abfd);

  return abfd->xvec;

fail:
  (void) bfd_release (abfd, oasys);
  abfd->tdata.oasys_obj_data = save;
  return NULL;
}


static void
oasys_get_symbol_info (bfd *ignore_abfd ATTRIBUTE_UNUSED,
		       asymbol *symbol,
		       symbol_info *ret)
{
  bfd_symbol_info (symbol, ret);

  if (!symbol->section)
    ret->type = (symbol->flags & BSF_LOCAL) ? 'a' : 'A';
}

static void
oasys_print_symbol (bfd *abfd, void * afile, asymbol *symbol, bfd_print_symbol_type how)
{
  FILE *file = (FILE *) afile;

  switch (how)
    {
    case bfd_print_symbol_name:
    case bfd_print_symbol_more:
      fprintf (file, "%s", symbol->name);
      break;
    case bfd_print_symbol_all:
      {
	const char *section_name = symbol->section == NULL ?
	(const char *) "*abs" : symbol->section->name;

	bfd_print_symbol_vandf (abfd, (void *) file, symbol);

	fprintf (file, " %-5s %s",
		 section_name,
		 symbol->name);
      }
      break;
    }
}

static bfd_boolean
oasys_new_section_hook (bfd *abfd, asection *newsect)
{
  if (!newsect->used_by_bfd)
    {
      newsect->used_by_bfd
	= bfd_alloc (abfd, (bfd_size_type) sizeof (oasys_per_section_type));
      if (!newsect->used_by_bfd)
	return FALSE;
    }
  oasys_per_section (newsect)->data = NULL;
  oasys_per_section (newsect)->section = newsect;
  oasys_per_section (newsect)->offset = 0;
  oasys_per_section (newsect)->initialized = FALSE;
  newsect->alignment_power = 1;

  /* Turn the section string into an index.  */
  sscanf (newsect->name, "%u", &newsect->target_index);

  return _bfd_generic_new_section_hook (abfd, newsect);
}


static long
oasys_get_reloc_upper_bound (bfd *abfd, sec_ptr asect)
{
  if (! oasys_slurp_section_data (abfd))
    return -1;
  return (asect->reloc_count + 1) * sizeof (arelent *);
}

static bfd_boolean
oasys_get_section_contents (bfd *abfd,
			    sec_ptr section,
			    void * location,
			    file_ptr offset,
			    bfd_size_type count)
{
  oasys_per_section_type *p = oasys_per_section (section);

  oasys_slurp_section_data (abfd);

  if (! p->initialized)
    (void) memset (location, 0, (size_t) count);
  else
    (void) memcpy (location, (void *) (p->data + offset), (size_t) count);

  return TRUE;
}

static long
oasys_canonicalize_reloc (bfd *ignore_abfd ATTRIBUTE_UNUSED,
			  sec_ptr section,
			  arelent **relptr,
			  asymbol **symbols ATTRIBUTE_UNUSED)
{
  unsigned int reloc_count = 0;
  oasys_reloc_type *src = (oasys_reloc_type *) (section->relocation);

  if (src != NULL)
    abort ();

  *relptr = NULL;
  return section->reloc_count = reloc_count;
}


/* Writing.  */

/* Calculate the checksum and write one record.  */

static bfd_boolean
oasys_write_record (bfd *abfd,
		    oasys_record_enum_type type,
		    oasys_record_union_type *record,
		    size_t size)
{
  int checksum;
  size_t i;
  unsigned char *ptr;

  record->header.length = size;
  record->header.type = (int) type;
  record->header.check_sum = 0;
  record->header.fill = 0;
  ptr = (unsigned char *) &record->pad[0];
  checksum = 0;
  for (i = 0; i < size; i++)
    checksum += *ptr++;
  record->header.check_sum = 0xff & (-checksum);
  if (bfd_bwrite ((void *) record, (bfd_size_type) size, abfd) != size)
    return FALSE;
  return TRUE;
}


/* Write out all the symbols.  */

static bfd_boolean
oasys_write_syms (bfd *abfd)
{
  unsigned int count;
  asymbol **generic = bfd_get_outsymbols (abfd);
  unsigned int sym_index = 0;

  for (count = 0; count < bfd_get_symcount (abfd); count++)
    {
      oasys_symbol_record_type symbol;
      asymbol *const g = generic[count];
      const char *src = g->name;
      char *dst = symbol.name;
      unsigned int l = 0;

      if (bfd_is_com_section (g->section))
	{
	  symbol.relb = RELOCATION_TYPE_COM;
	  H_PUT_16 (abfd, sym_index, symbol.refno);
	  sym_index++;
	}
      else if (bfd_is_abs_section (g->section))
	{
	  symbol.relb = RELOCATION_TYPE_ABS;
	  H_PUT_16 (abfd, 0, symbol.refno);
	}
      else if (bfd_is_und_section (g->section))
	{
	  symbol.relb = RELOCATION_TYPE_UND;
	  H_PUT_16 (abfd, sym_index, symbol.refno);
	  /* Overload the value field with the output sym_index number */
	  sym_index++;
	}
      else if (g->flags & BSF_DEBUGGING)
	/* Throw it away.  */
	continue;
      else
	{
	  if (g->section == NULL)
	    /* Sometime, the oasys tools give out a symbol with illegal
	       bits in it, we'll output it in the same broken way.  */
	    symbol.relb = RELOCATION_TYPE_REL | 0;
	  else
	    symbol.relb = RELOCATION_TYPE_REL | g->section->output_section->target_index;

	  H_PUT_16 (abfd, 0, symbol.refno);
	}

#ifdef UNDERSCORE_HACK
      if (src[l] == '_')
	dst[l++] = '.';
#endif
      while (src[l])
	{
	  dst[l] = src[l];
	  l++;
	}

      H_PUT_32 (abfd, g->value, symbol.value);

      if (g->flags & BSF_LOCAL)
	{
	  if (! oasys_write_record (abfd,
				    oasys_record_is_local_enum,
				    (oasys_record_union_type *) & symbol,
				    offsetof (oasys_symbol_record_type,
					      name[0]) + l))
	    return FALSE;
	}
      else
	{
	  if (! oasys_write_record (abfd,
				    oasys_record_is_symbol_enum,
				    (oasys_record_union_type *) & symbol,
				    offsetof (oasys_symbol_record_type,
					      name[0]) + l))
	    return FALSE;
	}
      g->value = sym_index - 1;
    }

  return TRUE;
}

/* Write a section header for each section.  */

static bfd_boolean
oasys_write_sections (bfd *abfd)
{
  asection *s;
  static oasys_section_record_type out;

  for (s = abfd->sections; s != NULL; s = s->next)
    {
      if (!ISDIGIT (s->name[0]))
	{
	  (*_bfd_error_handler)
	    (_("%s: can not represent section `%s' in oasys"),
	     bfd_get_filename (abfd), s->name);
	  bfd_set_error (bfd_error_nonrepresentable_section);
	  return FALSE;
	}
      out.relb = RELOCATION_TYPE_REL | s->target_index;
      H_PUT_32 (abfd, s->size, out.value);
      H_PUT_32 (abfd, s->vma, out.vma);

      if (! oasys_write_record (abfd,
				oasys_record_is_section_enum,
				(oasys_record_union_type *) & out,
				sizeof (out)))
	return FALSE;
    }
  return TRUE;
}

static bfd_boolean
oasys_write_header (bfd *abfd)
{
  /* Create and write the header.  */
  oasys_header_record_type r;
  size_t length = strlen (abfd->filename);

  if (length > (size_t) sizeof (r.module_name))
    length = sizeof (r.module_name);
  else if (length < (size_t) sizeof (r.module_name))
    (void) memset (r.module_name + length, ' ',
		   sizeof (r.module_name) - length);

  (void) memcpy (r.module_name, abfd->filename, length);

  r.version_number = OASYS_VERSION_NUMBER;
  r.rev_number = OASYS_REV_NUMBER;

  return oasys_write_record (abfd, oasys_record_is_header_enum,
			     (oasys_record_union_type *) & r,
			     offsetof (oasys_header_record_type,
				       description[0]));
}

static bfd_boolean
oasys_write_end (bfd *abfd)
{
  oasys_end_record_type end;
  unsigned char null = 0;

  end.relb = RELOCATION_TYPE_ABS;
  H_PUT_32 (abfd, abfd->start_address, end.entry);
  H_PUT_16 (abfd, 0, end.fill);
  end.zero = 0;
  if (! oasys_write_record (abfd,
			    oasys_record_is_end_enum,
			    (oasys_record_union_type *) & end,
			    sizeof (end)))
    return FALSE;

  return bfd_bwrite ((void *) &null, (bfd_size_type) 1, abfd) == 1;
}

static int
comp (const void * ap, const void * bp)
{
  arelent *a = *((arelent **) ap);
  arelent *b = *((arelent **) bp);

  return a->address - b->address;
}

static bfd_boolean
oasys_write_data (bfd *abfd)
{
  asection *s;

  for (s = abfd->sections; s != NULL; s = s->next)
    {
      if (s->flags & SEC_LOAD)
	{
	  bfd_byte *raw_data = oasys_per_section (s)->data;
	  oasys_data_record_type processed_data;
	  bfd_size_type current_byte_index = 0;
	  unsigned int relocs_to_go = s->reloc_count;
	  arelent **p = s->orelocation;

	  if (s->reloc_count != 0)
	    /* Sort the reloc records so it's easy to insert the relocs into the
	       data.  */
	    qsort (s->orelocation, s->reloc_count, sizeof (arelent **), comp);

	  current_byte_index = 0;
	  processed_data.relb = s->target_index | RELOCATION_TYPE_REL;

	  while (current_byte_index < s->size)
	    {
	      /* Scan forwards by eight bytes or however much is left and see if
	       there are any relocations going on.  */
	      bfd_byte *mod = &processed_data.data[0];
	      bfd_byte *dst = &processed_data.data[1];

	      unsigned int i = 0;
	      *mod = 0;

	      H_PUT_32 (abfd, s->vma + current_byte_index,
			processed_data.addr);

	      /* Don't start a relocation unless you're sure you can finish it
		 within the same data record.  The worst case relocation is a
		 4-byte relocatable value which is split across two modification
		 bytes (1 relocation byte + 2 symbol reference bytes + 2 data +
		 1 modification byte + 2 data = 8 bytes total).  That's where
		 the magic number 8 comes from.  */
	      while (current_byte_index < s->size && dst <=
		     & processed_data.data[sizeof (processed_data.data) - 8])
		{
		  if (relocs_to_go != 0)
		    {
		      arelent *r = *p;

		      /* There is a relocation, is it for this byte ?  */
		      if (r->address == current_byte_index)
			abort ();
		    }

		  /* If this is coming from an unloadable section then copy
		     zeros.  */
		  if (raw_data == NULL)
		    *dst++ = 0;
		  else
		    *dst++ = *raw_data++;

		  if (++i >= 8)
		    {
		      i = 0;
		      mod = dst++;
		      *mod = 0;
		    }
		  current_byte_index++;
		}

	      /* Don't write a useless null modification byte.  */
	      if (dst == mod + 1)
		--dst;

	      if (! (oasys_write_record
		     (abfd, oasys_record_is_data_enum,
		      ((oasys_record_union_type *) &processed_data),
		      (size_t) (dst - (bfd_byte *) &processed_data))))
		return FALSE;
	    }
	}
    }

  return TRUE;
}

static bfd_boolean
oasys_write_object_contents (bfd *abfd)
{
  if (! oasys_write_header (abfd))
    return FALSE;
  if (! oasys_write_syms (abfd))
    return FALSE;
  if (! oasys_write_sections (abfd))
    return FALSE;
  if (! oasys_write_data (abfd))
    return FALSE;
  if (! oasys_write_end (abfd))
    return FALSE;
  return TRUE;
}

/* Set section contents is complicated with OASYS since the format is
   not a byte image, but a record stream.  */

static bfd_boolean
oasys_set_section_contents (bfd *abfd,
			    sec_ptr section,
			    const void * location,
			    file_ptr offset,
			    bfd_size_type count)
{
  if (count != 0)
    {
      if (oasys_per_section (section)->data == NULL)
	{
	  oasys_per_section (section)->data = bfd_alloc (abfd, section->size);
	  if (!oasys_per_section (section)->data)
	    return FALSE;
	}
      (void) memcpy ((void *) (oasys_per_section (section)->data + offset),
		     location, (size_t) count);
    }
  return TRUE;
}



/* Native-level interface to symbols.  */

/* We read the symbols into a buffer, which is discarded when this
   function exits.  We read the strings into a buffer large enough to
   hold them all plus all the cached symbol entries.  */

static asymbol *
oasys_make_empty_symbol (bfd *abfd)
{
  bfd_size_type amt = sizeof (oasys_symbol_type);
  oasys_symbol_type *new_symbol_type = bfd_zalloc (abfd, amt);

  if (!new_symbol_type)
    return NULL;
  new_symbol_type->symbol.the_bfd = abfd;
  return &new_symbol_type->symbol;
}

/* User should have checked the file flags; perhaps we should return
   BFD_NO_MORE_SYMBOLS if there are none?  */

static bfd *
oasys_openr_next_archived_file (bfd *arch, bfd *prev)
{
  oasys_ar_data_type *ar = OASYS_AR_DATA (arch);
  oasys_module_info_type *p;

  /* Take the next one from the arch state, or reset.  */
  if (prev == NULL)
    /* Reset the index - the first two entries are bogus.  */
    ar->module_index = 0;

  p = ar->module + ar->module_index;
  ar->module_index++;

  if (ar->module_index <= ar->module_count)
    {
      if (p->abfd == NULL)
	{
	  p->abfd = _bfd_create_empty_archive_element_shell (arch);
	  p->abfd->origin = p->pos;
	  p->abfd->filename = xstrdup (p->name);

	  /* Fixup a pointer to this element for the member.  */
	  p->abfd->arelt_data = (void *) p;
	}
      return p->abfd;
    }

  bfd_set_error (bfd_error_no_more_archived_files);
  return NULL;
}

static bfd_boolean
oasys_find_nearest_line (bfd *abfd ATTRIBUTE_UNUSED,
			 asection *section ATTRIBUTE_UNUSED,
			 asymbol **symbols ATTRIBUTE_UNUSED,
			 bfd_vma offset ATTRIBUTE_UNUSED,
			 const char **filename_ptr ATTRIBUTE_UNUSED,
			 const char **functionname_ptr ATTRIBUTE_UNUSED,
			 unsigned int *line_ptr ATTRIBUTE_UNUSED)
{
  return FALSE;
}

static bfd_boolean
oasys_find_inliner_info (bfd *abfd ATTRIBUTE_UNUSED,
			 const char **filename_ptr ATTRIBUTE_UNUSED,
			 const char **functionname_ptr ATTRIBUTE_UNUSED,
			 unsigned int *line_ptr ATTRIBUTE_UNUSED)
{
  return FALSE;
}

static int
oasys_generic_stat_arch_elt (bfd *abfd, struct stat *buf)
{
  oasys_module_info_type *mod = (oasys_module_info_type *) abfd->arelt_data;

  if (mod == NULL)
    {
      bfd_set_error (bfd_error_invalid_operation);
      return -1;
    }

  buf->st_size = mod->size;
  buf->st_mode = 0666;
  return 0;
}

static int
oasys_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED,
		      struct bfd_link_info *info ATTRIBUTE_UNUSED)
{
  return 0;
}

#define	oasys_close_and_cleanup                    _bfd_generic_close_and_cleanup
#define oasys_bfd_free_cached_info                 _bfd_generic_bfd_free_cached_info
#define oasys_slurp_armap                          bfd_true
#define oasys_slurp_extended_name_table            bfd_true
#define oasys_construct_extended_name_table        ((bfd_boolean (*) (bfd *, char **, bfd_size_type *, const char **)) bfd_true)
#define oasys_truncate_arname                      bfd_dont_truncate_arname
#define oasys_write_armap                          ((bfd_boolean (*) (bfd *, unsigned int, struct orl *, unsigned int, int)) bfd_true)
#define oasys_read_ar_hdr                          bfd_nullvoidptr
#define oasys_write_ar_hdr ((bfd_boolean (*) (bfd *, bfd *)) bfd_false)
#define oasys_get_elt_at_index                     _bfd_generic_get_elt_at_index
#define oasys_update_armap_timestamp               bfd_true
#define oasys_bfd_is_local_label_name              bfd_generic_is_local_label_name
#define oasys_bfd_is_target_special_symbol         ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
#define oasys_get_lineno                           _bfd_nosymbols_get_lineno
#define oasys_bfd_make_debug_symbol                _bfd_nosymbols_bfd_make_debug_symbol
#define oasys_read_minisymbols                     _bfd_generic_read_minisymbols
#define oasys_minisymbol_to_symbol                 _bfd_generic_minisymbol_to_symbol
#define oasys_bfd_reloc_type_lookup                _bfd_norelocs_bfd_reloc_type_lookup
#define oasys_bfd_reloc_name_lookup          _bfd_norelocs_bfd_reloc_name_lookup
#define oasys_set_arch_mach                        bfd_default_set_arch_mach
#define oasys_get_section_contents_in_window       _bfd_generic_get_section_contents_in_window
#define oasys_bfd_get_relocated_section_contents   bfd_generic_get_relocated_section_contents
#define oasys_bfd_relax_section                    bfd_generic_relax_section
#define oasys_bfd_gc_sections                      bfd_generic_gc_sections
#define oasys_bfd_lookup_section_flags             bfd_generic_lookup_section_flags
#define oasys_bfd_merge_sections                   bfd_generic_merge_sections
#define oasys_bfd_is_group_section                 bfd_generic_is_group_section
#define oasys_bfd_discard_group                    bfd_generic_discard_group
#define oasys_section_already_linked               _bfd_generic_section_already_linked
#define oasys_bfd_define_common_symbol             bfd_generic_define_common_symbol
#define oasys_bfd_link_hash_table_create           _bfd_generic_link_hash_table_create
#define oasys_bfd_link_hash_table_free             _bfd_generic_link_hash_table_free
#define oasys_bfd_link_add_symbols                 _bfd_generic_link_add_symbols
#define oasys_bfd_link_just_syms                   _bfd_generic_link_just_syms
#define oasys_bfd_copy_link_hash_symbol_type \
  _bfd_generic_copy_link_hash_symbol_type
#define oasys_bfd_final_link                       _bfd_generic_final_link
#define oasys_bfd_link_split_section               _bfd_generic_link_split_section

const bfd_target oasys_vec =
{
  "oasys",			/* Name.  */
  bfd_target_oasys_flavour,
  BFD_ENDIAN_BIG,		/* Target byte order.  */
  BFD_ENDIAN_BIG,		/* Target headers byte order.  */
  (HAS_RELOC | EXEC_P |		/* Object flags.  */
   HAS_LINENO | HAS_DEBUG |
   HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
  (SEC_CODE | SEC_DATA | SEC_ROM | SEC_HAS_CONTENTS
   | SEC_ALLOC | SEC_LOAD | SEC_RELOC),	/* Section flags.  */
  0,				/* Leading underscore.  */
  ' ',				/* AR_pad_char.  */
  16,				/* AR_max_namelen.  */
  0,				/* match priority.  */
  bfd_getb64, bfd_getb_signed_64, bfd_putb64,
  bfd_getb32, bfd_getb_signed_32, bfd_putb32,
  bfd_getb16, bfd_getb_signed_16, bfd_putb16,	/* Data.  */
  bfd_getb64, bfd_getb_signed_64, bfd_putb64,
  bfd_getb32, bfd_getb_signed_32, bfd_putb32,
  bfd_getb16, bfd_getb_signed_16, bfd_putb16,	/* Headers.  */

  {_bfd_dummy_target,
   oasys_object_p,		/* bfd_check_format.  */
   oasys_archive_p,
   _bfd_dummy_target,
  },
  {				/* bfd_set_format.  */
    bfd_false,
    oasys_mkobject,
    _bfd_generic_mkarchive,
    bfd_false
  },
  {				/* bfd_write_contents.  */
    bfd_false,
    oasys_write_object_contents,
    _bfd_write_archive_contents,
    bfd_false,
  },

  BFD_JUMP_TABLE_GENERIC (oasys),
  BFD_JUMP_TABLE_COPY (_bfd_generic),
  BFD_JUMP_TABLE_CORE (_bfd_nocore),
  BFD_JUMP_TABLE_ARCHIVE (oasys),
  BFD_JUMP_TABLE_SYMBOLS (oasys),
  BFD_JUMP_TABLE_RELOCS (oasys),
  BFD_JUMP_TABLE_WRITE (oasys),
  BFD_JUMP_TABLE_LINK (oasys),
  BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),

  NULL,

  NULL
};