aboutsummaryrefslogtreecommitdiff
path: root/bfd/tekhex.c
blob: 4391da1844121576524680e625c24778bf775004 (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
/* BFD backend for Extended Tektronix Hex Format  objects.
   Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002
   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 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.  */

/*
SUBSECTION
	Tektronix Hex Format handling

DESCRIPTION

	Tek Hex records can hold symbols and data, but not
	relocations. Their main application is communication with
	devices like PROM programmers and ICE equipment.

	It seems that the sections are descibed as being really big,
        the example I have says that the text section is 0..ffffffff.
	BFD would barf with this, many apps would try to alloc 4GB to
	read in the file.

	Tex Hex may contain many sections, but the data which comes in
	has no tag saying which section it belongs to, so we create
	one section for each block of data, called "blknnnn" which we
	stick all the data into.

	TekHex may come out of 	order and there is no header, so an
	initial scan is required  to discover the minimum and maximum
	addresses used to create the vma and size of the sections we
	create.
	We read in the data into pages of CHUNK_MASK+1 size and read
	them out from that whenever we need to.

	Any number of sections may be created for output, we save them
	up and output them when it's time to close the bfd.

	A TekHex record looks like:
EXAMPLE
	%<block length><type><checksum><stuff><cr>

DESCRIPTION
	Where
	o length
	is the number of bytes in the record not including the % sign.
	o type
	is one of:
	3) symbol record
	6) data record
	8) termination record

The data can come out of order, and may be discontigous. This is a
serial protocol, so big files are unlikely, so we keep a list of 8k chunks
*/

#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "libiberty.h"

typedef struct
  {
    bfd_vma low;
    bfd_vma high;
  } addr_range_type;

typedef struct tekhex_symbol_struct
  {

    asymbol symbol;
    struct tekhex_symbol_struct *prev;

  } tekhex_symbol_type;

static const char digs[] = "0123456789ABCDEF";

static char sum_block[256];

#define NOT_HEX 20
#define NIBBLE(x) hex_value(x)
#define HEX(buffer) ((NIBBLE((buffer)[0])<<4) + NIBBLE((buffer)[1]))
#define TOHEX(d,x) \
(d)[1] = digs[(x) & 0xf]; \
(d)[0] = digs[((x)>>4)&0xf];
#define	ISHEX(x)  hex_p(x)

static void tekhex_init PARAMS ((void));
static bfd_vma getvalue PARAMS ((char **));
static void tekhex_print_symbol
 PARAMS ((bfd *, PTR, asymbol *, bfd_print_symbol_type));
static void tekhex_get_symbol_info PARAMS ((bfd *, asymbol *, symbol_info *));
static asymbol *tekhex_make_empty_symbol PARAMS ((bfd *));
static int tekhex_sizeof_headers PARAMS ((bfd *, boolean));
static boolean tekhex_write_object_contents PARAMS ((bfd *));
static void out PARAMS ((bfd *, int, char *, char *));
static void writesym PARAMS ((char **, const char *));
static void writevalue PARAMS ((char **, bfd_vma));
static boolean tekhex_set_section_contents
 PARAMS ((bfd*, sec_ptr, PTR, file_ptr, bfd_size_type));
static boolean tekhex_set_arch_mach
 PARAMS ((bfd *, enum bfd_architecture, unsigned long));
static boolean tekhex_get_section_contents
 PARAMS ((bfd *, asection *, PTR, file_ptr, bfd_size_type));
static void move_section_contents
 PARAMS ((bfd *, asection *, PTR, file_ptr, bfd_size_type, boolean));
static const bfd_target *tekhex_object_p PARAMS ((bfd *));
static boolean tekhex_mkobject PARAMS ((bfd *));
static long tekhex_get_symtab_upper_bound PARAMS ((bfd *));
static long tekhex_get_symtab PARAMS ((bfd *, asymbol **));
static void pass_over PARAMS ((bfd *, void (*) (bfd*, int, char *)));
static void first_phase PARAMS ((bfd *, int, char *));
static void insert_byte PARAMS ((bfd *, int, bfd_vma));
static struct data_struct *find_chunk PARAMS ((bfd *, bfd_vma));
static unsigned int getsym PARAMS ((char *, char **));

/*
Here's an example
%3A6C6480004E56FFFC4E717063B0AEFFFC6D0652AEFFFC60F24E5E4E75
%1B3709T_SEGMENT1108FFFFFFFF
%2B3AB9T_SEGMENT7Dgcc_compiled$1087hello$c10
%373829T_SEGMENT80int$t1$r1$$214741080char$t2$r2$0$12710
%373769T_SEGMENT80long$int$t3$r1$$1080unsigned$int$t4$10
%373CA9T_SEGMENT80long$unsigned$in1080short$int$t6$r1$10
%373049T_SEGMENT80long$long$int$t71080short$unsigned$i10
%373A29T_SEGMENT80long$long$unsign1080signed$char$t10$10
%373D69T_SEGMENT80unsigned$char$t11080float$t12$r1$4$010
%373D19T_SEGMENT80double$t13$r1$8$1080long$double$t14$10
%2734D9T_SEGMENT8Bvoid$t15$151035_main10
%2F3CA9T_SEGMENT81$1081$1681$1E81$21487main$F110
%2832F9T_SEGMENT83i$18FFFFFFFC81$1481$214
%07 8 10 10

explanation:
%3A6C6480004E56FFFC4E717063B0AEFFFC6D0652AEFFFC60F24E5E4E75
 ^ ^^ ^     ^-data
 | || +------ 4 char integer 0x8000
 | |+-------- checksum
 | +--------- type 6 (data record)
 +----------- length 3a chars
 <---------------------- 3a (58 chars) ------------------->

%1B3709T_SEGMENT1108FFFFFFFF
      ^         ^^ ^- 8 character integer 0xffffffff
      |         |+-   1 character integer 0
      |         +--   type 1 symbol (section definition)
      +------------   9 char symbol T_SEGMENT

%2B3AB9T_SEGMENT7Dgcc_compiled$1087hello$c10
%373829T_SEGMENT80int$t1$r1$$214741080char$t2$r2$0$12710
%373769T_SEGMENT80long$int$t3$r1$$1080unsigned$int$t4$10
%373CA9T_SEGMENT80long$unsigned$in1080short$int$t6$r1$10
%373049T_SEGMENT80long$long$int$t71080short$unsigned$i10
%373A29T_SEGMENT80long$long$unsign1080signed$char$t10$10
%373D69T_SEGMENT80unsigned$char$t11080float$t12$r1$4$010
%373D19T_SEGMENT80double$t13$r1$8$1080long$double$t14$10
%2734D9T_SEGMENT8Bvoid$t15$151035_main10
%2F3CA9T_SEGMENT81$1081$1681$1E81$21487main$F110
%2832F9T_SEGMENT83i$18FFFFFFFC81$1481$214
%0781010

Turns into
sac@thepub$ ./objdump -dx -m m68k f

f:     file format tekhex
-----x--- 9/55728 -134219416 Sep 29 15:13 1995 f
architecture: UNKNOWN!, flags 0x00000010:
HAS_SYMS
start address 0x00000000
SECTION 0 [D00000000]	: size 00020000 vma 00000000 align 2**0
 ALLOC, LOAD
SECTION 1 [D00008000]	: size 00002001 vma 00008000 align 2**0

SECTION 2 [T_SEGMENT]	: size ffffffff vma 00000000 align 2**0

SYMBOL TABLE:
00000000  g       T_SEGMENT gcc_compiled$
00000000  g       T_SEGMENT hello$c
00000000  g       T_SEGMENT int$t1$r1$$21474
00000000  g       T_SEGMENT char$t2$r2$0$127
00000000  g       T_SEGMENT long$int$t3$r1$$
00000000  g       T_SEGMENT unsigned$int$t4$
00000000  g       T_SEGMENT long$unsigned$in
00000000  g       T_SEGMENT short$int$t6$r1$
00000000  g       T_SEGMENT long$long$int$t7
00000000  g       T_SEGMENT short$unsigned$i
00000000  g       T_SEGMENT long$long$unsign
00000000  g       T_SEGMENT signed$char$t10$
00000000  g       T_SEGMENT unsigned$char$t1
00000000  g       T_SEGMENT float$t12$r1$4$0
00000000  g       T_SEGMENT double$t13$r1$8$
00000000  g       T_SEGMENT long$double$t14$
00000000  g       T_SEGMENT void$t15$15
00000000  g       T_SEGMENT _main
00000000  g       T_SEGMENT $
00000000  g       T_SEGMENT $
00000000  g       T_SEGMENT $
00000010  g       T_SEGMENT $
00000000  g       T_SEGMENT main$F1
fcffffff  g       T_SEGMENT i$1
00000000  g       T_SEGMENT $
00000010  g       T_SEGMENT $

RELOCATION RECORDS FOR [D00000000]: (none)

RELOCATION RECORDS FOR [D00008000]: (none)

RELOCATION RECORDS FOR [T_SEGMENT]: (none)

Disassembly of section D00000000:
...
00008000 ($+)7ff0 linkw fp,#-4
00008004 ($+)7ff4 nop
00008006 ($+)7ff6 movel #99,d0
00008008 ($+)7ff8 cmpl fp@(-4),d0
0000800c ($+)7ffc blts 00008014 ($+)8004
0000800e ($+)7ffe addql #1,fp@(-4)
00008012 ($+)8002 bras 00008006 ($+)7ff6
00008014 ($+)8004 unlk fp
00008016 ($+)8006 rts
...

*/

static void
tekhex_init ()
{
  unsigned int i;
  static boolean inited = false;
  int val;

  if (inited == false)
    {
      inited = true;
      hex_init ();
      val = 0;
      for (i = 0; i < 10; i++)
	{
	  sum_block[i + '0'] = val++;
	}
      for (i = 'A'; i <= 'Z'; i++)
	{
	  sum_block[i] = val++;
	}
      sum_block['$'] = val++;
      sum_block['%'] = val++;
      sum_block['.'] = val++;
      sum_block['_'] = val++;
      for (i = 'a'; i <= 'z'; i++)
	{
	  sum_block[i] = val++;
	}
    }
}

/* The maximum number of bytes on a line is FF */
#define MAXCHUNK 0xff
/* The number of bytes we fit onto a line on output */
#define CHUNK 21

/* We cannot output our tekhexords as we see them, we have to glue them
   together, this is done in this structure : */

struct tekhex_data_list_struct
{
  unsigned char *data;
  bfd_vma where;
  bfd_size_type size;
  struct tekhex_data_list_struct *next;

};
typedef struct tekhex_data_list_struct tekhex_data_list_type;

#define CHUNK_MASK 0x1fff

struct data_struct
  {
    char chunk_data[CHUNK_MASK + 1];
    char chunk_init[CHUNK_MASK + 1];
    bfd_vma vma;
    struct data_struct *next;
  };

typedef struct tekhex_data_struct
{
  tekhex_data_list_type *head;
  unsigned int type;
  struct tekhex_symbol_struct *symbols;
  struct data_struct *data;
} tdata_type;

#define enda(x) (x->vma + x->size)

static bfd_vma
getvalue (srcp)
     char **srcp;
{
  char *src = *srcp;
  bfd_vma value = 0;
  unsigned int len = hex_value(*src++);

  if (len == 0)
    len = 16;
  while (len--)
    {
      value = value << 4 | hex_value(*src++);
    }
  *srcp = src;
  return value;
}

static unsigned int
getsym (dstp, srcp)
     char *dstp;
     char **srcp;
{
  char *src = *srcp;
  unsigned int i;
  unsigned int len = hex_value(*src++);

  if (len == 0)
    len = 16;
  for (i = 0; i < len; i++)
    dstp[i] = src[i];
  dstp[i] = 0;
  *srcp = src + i;
  return len;
}

static struct data_struct *
find_chunk (abfd, vma)
     bfd *abfd;
     bfd_vma vma;
{
  struct data_struct *d = abfd->tdata.tekhex_data->data;

  vma &= ~CHUNK_MASK;
  while (d && (d->vma) != vma)
    {
      d = d->next;
    }
  if (!d)
    {
      char *sname = bfd_alloc (abfd, (bfd_size_type) 12);

      /* No chunk for this address, so make one up */
      d = ((struct data_struct *)
	   bfd_alloc (abfd, (bfd_size_type) sizeof (struct data_struct)));

      if (!sname || !d)
	return NULL;

      memset (d->chunk_init, 0, CHUNK_MASK + 1);
      memset (d->chunk_data, 0, CHUNK_MASK + 1);
      d->next = abfd->tdata.tekhex_data->data;
      d->vma = vma;
      abfd->tdata.tekhex_data->data = d;
    }
  return d;
}

static void
insert_byte (abfd, value, addr)
     bfd *abfd;
     int value;
     bfd_vma addr;
{
  /* Find the chunk that this byte needs and put it in */
  struct data_struct *d = find_chunk (abfd, addr);

  d->chunk_data[addr & CHUNK_MASK] = value;
  d->chunk_init[addr & CHUNK_MASK] = 1;
}

/* The first pass is to find the names of all the sections, and see
  how big the data is */
static void
first_phase (abfd, type, src)
     bfd *abfd;
     int type;
     char *src;
{
  asection *section = bfd_abs_section_ptr;
  unsigned int len;
  char sym[17];			/* A symbol can only be 16chars long */

  switch (type)
    {
    case '6':
      /* Data record - read it and store it */
      {
	bfd_vma addr = getvalue (&src);

	while (*src)
	  {
	    insert_byte (abfd, HEX (src), addr);
	    src += 2;
	    addr++;
	  }
      }

      return;
    case '3':
      /* Symbol record, read the segment */
      len = getsym (sym, &src);
      section = bfd_get_section_by_name (abfd, sym);
      if (section == (asection *) NULL)
	{
	  char *n = bfd_alloc (abfd, (bfd_size_type) len + 1);

	  if (!n)
	    abort ();		/* FIXME */
	  memcpy (n, sym, len + 1);
	  section = bfd_make_section (abfd, n);
	}
      while (*src)
	{
	  switch (*src)
	    {
	    case '1':		/* section range */
	      src++;
	      section->vma = getvalue (&src);
	      section->_raw_size = getvalue (&src) - section->vma;
	      section->flags = SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC;
	      break;
	    case '0':
	    case '2':
	    case '3':
	    case '4':
	    case '6':
	    case '7':
	    case '8':
	      /* Symbols, add to section */
	      {
		bfd_size_type amt = sizeof (tekhex_symbol_type);
		tekhex_symbol_type *new =
		  (tekhex_symbol_type *) bfd_alloc (abfd, amt);
		char stype = (*src);

		if (!new)
		  abort ();	/* FIXME */
		new->symbol.the_bfd = abfd;
		src++;
		abfd->symcount++;
		abfd->flags |= HAS_SYMS;
		new->prev = abfd->tdata.tekhex_data->symbols;
		abfd->tdata.tekhex_data->symbols = new;
		len = getsym (sym, &src);
		new->symbol.name = bfd_alloc (abfd, (bfd_size_type) len + 1);
		if (!new->symbol.name)
		  abort ();	/* FIXME */
		memcpy ((char *) (new->symbol.name), sym, len + 1);
		new->symbol.section = section;
		if (stype <= '4')
		  new->symbol.flags = (BSF_GLOBAL | BSF_EXPORT);
		else
		  new->symbol.flags = BSF_LOCAL;
		new->symbol.value = getvalue (&src) - section->vma;
	      }
	    }
	}
    }
}

/* Pass over an tekhex, calling one of the above functions on each
   record.  */

static void
pass_over (abfd, func)
     bfd *abfd;
     void (*func) PARAMS ((bfd *, int, char *));
{
  unsigned int chars_on_line;
  boolean eof = false;

  /* To the front of the file */
  if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
    abort ();
  while (eof == false)
    {
      char buffer[MAXCHUNK];
      char *src = buffer;
      char type;

      /* Find first '%' */
      eof = (boolean) (bfd_bread (src, (bfd_size_type) 1, abfd) != 1);
      while (*src != '%' && !eof)
	{
	  eof = (boolean) (bfd_bread (src, (bfd_size_type) 1, abfd) != 1);
	}
      if (eof)
	break;
      src++;

      /* Fetch the type and the length and the checksum */
      if (bfd_bread (src, (bfd_size_type) 5, abfd) != 5)
	abort (); /* FIXME */

      type = src[2];

      if (!ISHEX (src[0]) || !ISHEX (src[1]))
	break;

      chars_on_line = HEX (src) - 5;	/* Already read five char */

      if (bfd_bread (src, (bfd_size_type) chars_on_line, abfd) != chars_on_line)
	abort (); /* FIXME */
      src[chars_on_line] = 0;	/* put a null at the end */

      func (abfd, type, src);
    }

}

static long
tekhex_get_symtab (abfd, table)
     bfd *abfd;
     asymbol **table;
{
  tekhex_symbol_type *p = abfd->tdata.tekhex_data->symbols;
  unsigned int c = bfd_get_symcount (abfd);

  table[c] = 0;
  while (p)
    {
      table[--c] = &(p->symbol);
      p = p->prev;
    }

  return bfd_get_symcount (abfd);
}

static long
tekhex_get_symtab_upper_bound (abfd)
     bfd *abfd;
{
  return (abfd->symcount + 1) * (sizeof (struct tekhex_asymbol_struct *));

}

static boolean
tekhex_mkobject (abfd)
     bfd *abfd;
{
  tdata_type *tdata;

  tdata = (tdata_type *) bfd_alloc (abfd, (bfd_size_type) sizeof (tdata_type));
  if (!tdata)
    return false;
  abfd->tdata.tekhex_data = tdata;
  tdata->type = 1;
  tdata->head = (tekhex_data_list_type *) NULL;
  tdata->symbols = (struct tekhex_symbol_struct *) NULL;
  tdata->data = (struct data_struct *) NULL;
  return true;
}

/*
  Return true if the file looks like it's in TekHex format. Just look
  for a percent sign and some hex digits */

static const bfd_target *
tekhex_object_p (abfd)
     bfd *abfd;
{
  char b[4];

  tekhex_init ();

  if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
      || bfd_bread (b, (bfd_size_type) 4, abfd) != 4)
    return NULL;

  if (b[0] != '%' || !ISHEX (b[1]) || !ISHEX (b[2]) || !ISHEX (b[3]))
    return (const bfd_target *) NULL;

  tekhex_mkobject (abfd);

  pass_over (abfd, first_phase);
  return abfd->xvec;
}

static void
move_section_contents (abfd, section, locationp, offset, count, get)
     bfd *abfd;
     asection *section;
     PTR locationp;
     file_ptr offset;
     bfd_size_type count;
     boolean get;
{
  bfd_vma addr;
  char *location = (char *) locationp;
  bfd_vma prev_number = 1;	/* Nothing can have this as a high bit*/
  struct data_struct *d = (struct data_struct *) NULL;

  BFD_ASSERT (offset == 0);
  for (addr = section->vma; count != 0; count--, addr++)
    {
      /* Get high bits of address.  */
      bfd_vma chunk_number = addr & ~(bfd_vma) CHUNK_MASK;
      bfd_vma low_bits = addr & CHUNK_MASK;

      if (chunk_number != prev_number)
	{
	  /* Different chunk, so move pointer */
	  d = find_chunk (abfd, chunk_number);
	}

      if (get)
	{
	  if (d->chunk_init[low_bits])
	    {
	      *location = d->chunk_data[low_bits];
	    }
	  else
	    {
	      *location = 0;
	    }
	}
      else
	{
	  d->chunk_data[low_bits] = *location;
	  d->chunk_init[low_bits] = (*location != 0);
	}

      location++;

    }

}

static boolean
tekhex_get_section_contents (abfd, section, locationp, offset, count)
     bfd *abfd;
     asection *section;
     PTR locationp;
     file_ptr offset;
     bfd_size_type count;
{
  if (section->flags & (SEC_LOAD | SEC_ALLOC))
    {
      move_section_contents (abfd, section, locationp, offset, count, true);
      return true;
    }
  else
    return false;
}

static boolean
tekhex_set_arch_mach (abfd, arch, machine)
     bfd *abfd;
     enum bfd_architecture arch;
     unsigned long machine;
{
  return bfd_default_set_arch_mach (abfd, arch, machine);
}

/* we have to save up all the Tekhexords for a splurge before output,
    */

static boolean
tekhex_set_section_contents (abfd, section, locationp, offset, bytes_to_do)
     bfd *abfd;
     sec_ptr section;
     PTR locationp;
     file_ptr offset;
     bfd_size_type bytes_to_do;
{

  if (abfd->output_has_begun == false)
    {
      /* The first time around, allocate enough sections to hold all the chunks */
      asection *s = abfd->sections;
      bfd_vma vma;

      for (s = abfd->sections; s; s = s->next)
	{
	  if (s->flags & SEC_LOAD)
	    {
	      for (vma = s->vma & ~(bfd_vma) CHUNK_MASK;
		   vma < s->vma + s->_raw_size;
		   vma += CHUNK_MASK)
		find_chunk (abfd, vma);
	    }
	}

    }
  if (section->flags & (SEC_LOAD | SEC_ALLOC))
    {
      move_section_contents (abfd, section, locationp, offset, bytes_to_do,
			     false);
      return true;
    }
  else
    return false;

}

static void
writevalue (dst, value)
     char **dst;
     bfd_vma value;
{
  char *p = *dst;
  int len;
  int shift;

  for (len = 8, shift = 28; shift; shift -= 4, len--)
    {
      if ((value >> shift) & 0xf)
	{
	  *p++ = len + '0';
	  while (len)
	    {
	      *p++ = digs[(value >> shift) & 0xf];
	      shift -= 4;
	      len--;
	    }
	  *dst = p;
	  return;

	}
    }
  *p++ = '1';
  *p++ = '0';
  *dst = p;
}

static void
writesym (dst, sym)
     char **dst;
     const char *sym;
{
  char *p = *dst;
  int len = (sym ? strlen (sym) : 0);

  if (len >= 16)
    {
      *p++ = '0';
      len = 16;
    }

  else
    {
      if (len == 0)
	{
	  *p++ = '1';
	  sym = "$";
	  len = 1;
	}
      else
	{
	  *p++ = digs[len];
	}
    }

  while (len--)
    {
      *p++ = *sym++;
    }
  *dst = p;
}

static void
out (abfd, type, start, end)
     bfd *abfd;
     int type;
     char *start;
     char *end;
{
  int sum = 0;
  char *s;
  char front[6];
  bfd_size_type wrlen;

  front[0] = '%';
  TOHEX (front + 1, end - start + 5);
  front[3] = type;

  for (s = start; s < end; s++)
    {
      sum += sum_block[(unsigned char) *s];
    }

  sum += sum_block[(unsigned char) front[1]];	/*  length */
  sum += sum_block[(unsigned char) front[2]];
  sum += sum_block[(unsigned char) front[3]];	/* type */
  TOHEX (front + 4, sum);
  if (bfd_bwrite (front, (bfd_size_type) 6, abfd) != 6)
    abort ();
  end[0] = '\n';
  wrlen = end - start + 1;
  if (bfd_bwrite (start, wrlen, abfd) != wrlen)
    abort ();
}

static boolean
tekhex_write_object_contents (abfd)
     bfd *abfd;
{
  int bytes_written;
  char buffer[100];
  asymbol **p;
  asection *s;
  struct data_struct *d;

  tekhex_init ();

  bytes_written = 0;

  /* And the raw data */
  for (d = abfd->tdata.tekhex_data->data;
       d != (struct data_struct *) NULL;
       d = d->next)
    {
      int low;

      const int span = 32;
      int addr;

      /* Write it in blocks of 32 bytes */

      for (addr = 0; addr < CHUNK_MASK + 1; addr += span)
	{
	  int need = 0;

	  /* Check to see if necessary */
	  for (low = 0; !need && low < span; low++)
	    {
	      if (d->chunk_init[addr + low])
		need = 1;
	    }
	  if (need)
	    {
	      char *dst = buffer;

	      writevalue (&dst, addr + d->vma);
	      for (low = 0; low < span; low++)
		{
		  TOHEX (dst, d->chunk_data[addr + low]);
		  dst += 2;
		}
	      out (abfd, '6', buffer, dst);
	    }
	}
    }
  /* write all the section headers for the sections */
  for (s = abfd->sections; s != (asection *) NULL; s = s->next)
    {
      char *dst = buffer;

      writesym (&dst, s->name);
      *dst++ = '1';
      writevalue (&dst, s->vma);
      writevalue (&dst, s->vma + s->_raw_size);
      out (abfd, '3', buffer, dst);
    }

  /* And the symbols */
  if (abfd->outsymbols)
    {
      for (p = abfd->outsymbols; *p; p++)
	{
	  int section_code = bfd_decode_symclass (*p);

	  if (section_code != '?')
	    {			/* do not include debug symbols */
	      asymbol *sym = *p;
	      char *dst = buffer;

	      writesym (&dst, sym->section->name);

	      switch (section_code)
		{
		case 'A':
		  *dst++ = '2';
		  break;
		case 'a':
		  *dst++ = '6';
		  break;
		case 'D':
		case 'B':
		case 'O':
		  *dst++ = '4';
		  break;
		case 'd':
		case 'b':
		case 'o':
		  *dst++ = '8';
		  break;
		case 'T':
		  *dst++ = '3';
		  break;
		case 't':
		  *dst++ = '7';
		  break;
		case 'C':
		case 'U':
		  bfd_set_error (bfd_error_wrong_format);
		  return false;
		}

	      writesym (&dst, sym->name);
	      writevalue (&dst, sym->value + sym->section->vma);
	      out (abfd, '3', buffer, dst);
	    }
	}
    }

  /* And the terminator */
  if (bfd_bwrite ("%0781010\n", (bfd_size_type) 9, abfd) != 9)
    abort ();
  return true;
}

static int
tekhex_sizeof_headers (abfd, exec)
     bfd *abfd ATTRIBUTE_UNUSED;
     boolean exec ATTRIBUTE_UNUSED;

{
  return 0;
}

static asymbol *
tekhex_make_empty_symbol (abfd)
     bfd *abfd;
{
  bfd_size_type amt = sizeof (struct tekhex_symbol_struct);
  tekhex_symbol_type *new = (tekhex_symbol_type *) bfd_zalloc (abfd, amt);

  if (!new)
    return NULL;
  new->symbol.the_bfd = abfd;
  new->prev = (struct tekhex_symbol_struct *) NULL;
  return &(new->symbol);
}

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

static void
tekhex_print_symbol (abfd, filep, symbol, how)
     bfd *abfd;
     PTR filep;
     asymbol *symbol;
     bfd_print_symbol_type how;
{
  FILE *file = (FILE *) filep;

  switch (how)
    {
    case bfd_print_symbol_name:
      fprintf (file, "%s", symbol->name);
      break;
    case bfd_print_symbol_more:
      break;

    case bfd_print_symbol_all:
      {
	const char *section_name = symbol->section->name;

	bfd_print_symbol_vandf (abfd, (PTR) file, symbol);

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

#define	tekhex_close_and_cleanup _bfd_generic_close_and_cleanup
#define tekhex_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
#define tekhex_new_section_hook _bfd_generic_new_section_hook

#define tekhex_bfd_is_local_label_name bfd_generic_is_local_label_name
#define tekhex_get_lineno _bfd_nosymbols_get_lineno
#define tekhex_find_nearest_line _bfd_nosymbols_find_nearest_line
#define tekhex_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
#define tekhex_read_minisymbols _bfd_generic_read_minisymbols
#define tekhex_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol

#define tekhex_bfd_get_relocated_section_contents \
  bfd_generic_get_relocated_section_contents
#define tekhex_bfd_relax_section bfd_generic_relax_section
#define tekhex_bfd_gc_sections bfd_generic_gc_sections
#define tekhex_bfd_merge_sections bfd_generic_merge_sections
#define tekhex_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
#define tekhex_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
#define tekhex_bfd_link_add_symbols _bfd_generic_link_add_symbols
#define tekhex_bfd_link_just_syms _bfd_generic_link_just_syms
#define tekhex_bfd_final_link _bfd_generic_final_link
#define tekhex_bfd_link_split_section _bfd_generic_link_split_section

#define tekhex_get_section_contents_in_window \
  _bfd_generic_get_section_contents_in_window

const bfd_target tekhex_vec =
{
  "tekhex",			/* name */
  bfd_target_tekhex_flavour,
  BFD_ENDIAN_UNKNOWN,		/* target byte order */
  BFD_ENDIAN_UNKNOWN,		/* target headers byte order */
  (EXEC_P |			/* object flags */
   HAS_SYMS | HAS_LINENO | HAS_DEBUG | HAS_RELOC | 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 */
  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,	/* hdrs */

  {
    _bfd_dummy_target,
    tekhex_object_p,		/* bfd_check_format */
    _bfd_dummy_target,
    _bfd_dummy_target,
  },
  {
    bfd_false,
    tekhex_mkobject,
    _bfd_generic_mkarchive,
    bfd_false,
  },
  {				/* bfd_write_contents */
    bfd_false,
    tekhex_write_object_contents,
    _bfd_write_archive_contents,
    bfd_false,
  },

  BFD_JUMP_TABLE_GENERIC (tekhex),
  BFD_JUMP_TABLE_COPY (_bfd_generic),
  BFD_JUMP_TABLE_CORE (_bfd_nocore),
  BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
  BFD_JUMP_TABLE_SYMBOLS (tekhex),
  BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
  BFD_JUMP_TABLE_WRITE (tekhex),
  BFD_JUMP_TABLE_LINK (tekhex),
  BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),

  NULL,

  (PTR) 0
};