aboutsummaryrefslogtreecommitdiff
path: root/gas/listing.c
blob: d6bac782cd16ac787c63ddf9e5948b7684cb17c6 (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
/* listing.c - mainting assembly listings
   Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 1998
   Free Software Foundation, Inc.

This file is part of GAS, the GNU Assembler.

GAS 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, or (at your option)
any later version.

GAS 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 GAS; see the file COPYING.  If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */

/*
 Contributed by Steve Chamberlain
 		sac@cygnus.com


 A listing page looks like:

 LISTING_HEADER  sourcefilename pagenumber
 TITLE LINE
 SUBTITLE LINE
 linenumber address data  source
 linenumber address data  source
 linenumber address data  source
 linenumber address data  source

 If not overridden, the listing commands are:

 .title  "stuff"
 	Put "stuff" onto the title line
 .sbttl  "stuff"
        Put stuff onto the subtitle line

  If these commands come within 10 lines of the top of the page, they
  will affect the page they are on, as well as any subsequent page

 .eject
 	Thow a page
 .list
 	Increment the enable listing counter
 .nolist
 	Decrement the enable listing counter

 .psize Y[,X]
 	Set the paper size to X wide and Y high. Setting a psize Y of
	zero will suppress form feeds except where demanded by .eject

 If the counter goes below zero, listing is suppressed.


 Listings are a maintained by read calling various listing_<foo>
 functions.  What happens most is that the macro NO_LISTING is not
 defined (from the Makefile), then the macro LISTING_NEWLINE expands
 into a call to listing_newline.  The call is done from read.c, every
 time it sees a newline, and -l is on the command line.

 The function listing_newline remembers the frag associated with the
 newline, and creates a new frag - note that this is wasteful, but not
 a big deal, since listing slows things down a lot anyway.  The
 function also rememebers when the filename changes.

 When all the input has finished, and gas has had a chance to settle
 down, the listing is output. This is done by running down the list of
 frag/source file records, and opening the files as needed and printing
 out the bytes and chars associated with them.

 The only things which the architecture can change about the listing
 are defined in these macros:

 LISTING_HEADER		The name of the architecture
 LISTING_WORD_SIZE      The make of the number of bytes in a word, this determines
 			the clumping of the output data. eg a value of
			2 makes words look like 1234 5678, whilst 1
			would make the same value look like 12 34 56
			78
 LISTING_LHS_WIDTH      Number of words of above size for the lhs

 LISTING_LHS_WIDTH_SECOND   Number of words for the data on the lhs
 			for the second line

 LISTING_LHS_CONT_LINES	Max number of lines to use up for a continutation
 LISTING_RHS_WIDTH      Number of chars from the input file to print
                        on a line
*/

#include <ctype.h>

#include "as.h"
#include <obstack.h>
#include "input-file.h"
#include "subsegs.h"

#ifndef NO_LISTING

#ifndef LISTING_HEADER
#define LISTING_HEADER "GAS LISTING"
#endif
#ifndef LISTING_WORD_SIZE
#define LISTING_WORD_SIZE 4
#endif
#ifndef LISTING_LHS_WIDTH
#define LISTING_LHS_WIDTH 1
#endif
#ifndef LISTING_LHS_WIDTH_SECOND
#define LISTING_LHS_WIDTH_SECOND 1
#endif
#ifndef LISTING_RHS_WIDTH
#define LISTING_RHS_WIDTH 100
#endif
#ifndef LISTING_LHS_CONT_LINES
#define LISTING_LHS_CONT_LINES 4
#endif

/* This structure remembers which .s were used */
typedef struct file_info_struct
{
  struct file_info_struct * next;
  char *                    filename;
  long                      pos;
  unsigned int              linenum;
  int                       at_end;
}
file_info_type;

/* This structure rememebrs which line from which file goes into which
   frag */
struct list_info_struct
{
  /* Frag which this line of source is nearest to */
  fragS * frag;

  /* The actual line in the source file */
  unsigned int line;
  /* Pointer to the file info struct for the file which this line
     belongs to */
  file_info_type * file;

  /* The expanded text of any macro that may have been executing.  */
  char * line_contents;

  /* Next in list */
  struct list_info_struct * next;

  /* Pointer to the file info struct for the high level language
     source line that belongs here */
  file_info_type * hll_file;
  /* High level language source line */
  unsigned int hll_line;

  /* Pointer to any error message associated with this line */
  char * message;

  enum
    {
      EDICT_NONE,
      EDICT_SBTTL,
      EDICT_TITLE,
      EDICT_NOLIST,
      EDICT_LIST,
      EDICT_NOLIST_NEXT,
      EDICT_EJECT
    } edict;
  char * edict_arg;

  /* Nonzero if this line is to be omitted because it contains
     debugging information.  This can become a flags field if we come
     up with more information to store here.  */
  int debugging;
};

typedef struct list_info_struct list_info_type;


int listing_lhs_width        = LISTING_LHS_WIDTH;
int listing_lhs_width_second = LISTING_LHS_WIDTH_SECOND;
int listing_lhs_cont_lines   = LISTING_LHS_CONT_LINES;
int listing_rhs_width        = LISTING_RHS_WIDTH;

struct list_info_struct *        listing_tail;

static file_info_type *          file_info_head;
static file_info_type *          last_open_file_info;
static FILE *                    last_open_file;
static struct list_info_struct * head;
static int                       paper_width = 200;
static int                       paper_height = 60;

extern int                       listing;

/* File to output listings to.  */
static FILE * list_file;

/* This static array is used to keep the text of data to be printed
   before the start of the line.  */

#define MAX_BYTES							\
  (((LISTING_WORD_SIZE * 2) + 1) * listing_lhs_width			\
   + ((((LISTING_WORD_SIZE * 2) + 1) * listing_lhs_width_second)	\
      * listing_lhs_cont_lines)						\
   + 20)

static char * data_buffer;

/* Prototypes.  */
static void listing_message PARAMS ((const char *name, const char *message));
static file_info_type * file_info PARAMS ((const char *file_name));
static void new_frag PARAMS ((void));
static char * buffer_line PARAMS ((file_info_type *file,
				  char *line, unsigned int size));
static void listing_page PARAMS ((list_info_type *list));
static unsigned int calc_hex PARAMS ((list_info_type *list));
static void print_lines PARAMS ((list_info_type *, unsigned int,
				 char *, unsigned int));
static void list_symbol_table PARAMS ((void));
static void print_source PARAMS ((file_info_type *current_file,
				  list_info_type *list,
				  char *buffer,
				  unsigned int width));
static int debugging_pseudo PARAMS ((list_info_type *, const char *));
static void listing_listing PARAMS ((char *name));


static void
listing_message (name, message)
     const char *name;
     const char *message;
{
  unsigned int l = strlen (name) + strlen (message) + 1;
  char *n = (char *) xmalloc (l);
  strcpy (n, name);
  strcat (n, message);
  if (listing_tail != (list_info_type *) NULL)
    {
      listing_tail->message = n;
    }
}

void
listing_warning (message)
     const char *message;
{
  listing_message (_("Warning:"), message);
}

void
listing_error (message)
     const char *message;
{
  listing_message (_("Error:"), message);
}

static file_info_type *
file_info (file_name)
     const char *file_name;
{
  /* Find an entry with this file name */
  file_info_type *p = file_info_head;

  while (p != (file_info_type *) NULL)
    {
      if (strcmp (p->filename, file_name) == 0)
	return p;
      p = p->next;
    }

  /* Make new entry */

  p = (file_info_type *) xmalloc (sizeof (file_info_type));
  p->next = file_info_head;
  file_info_head = p;
  p->filename = xmalloc ((unsigned long) strlen (file_name) + 1);
  strcpy (p->filename, file_name);
  p->pos = 0;
  p->linenum = 0;
  p->at_end = 0;

  return p;
}


static void
new_frag ()
{

  frag_wane (frag_now);
  frag_new (0);

}

void
listing_newline (ps)
     char *ps;
{
  char *file;
  unsigned int line;
  static unsigned int last_line = 0xffff;
  static char *last_file = NULL;
  list_info_type *new = NULL;

  if (listing == 0)
    return;

  if (now_seg == absolute_section)
    return;

#ifdef OBJ_ELF
  /* In ELF, anything in a section beginning with .debug or .line is
     considered to be debugging information.  This includes the
     statement which switches us into the debugging section, which we
     can only set after we are already in the debugging section.  */
  if ((listing & LISTING_NODEBUG) != 0
      && listing_tail != NULL
      && ! listing_tail->debugging)
    {
      const char *segname;

      segname = segment_name (now_seg);
      if (strncmp (segname, ".debug", sizeof ".debug" - 1) == 0
	  || strncmp (segname, ".line", sizeof ".line" - 1) == 0)
	listing_tail->debugging = 1;
    }
#endif

  as_where (&file, &line);
  if (ps == NULL)
    {
      if (line == last_line && !(last_file && file && strcmp (file, last_file)))
	return;

      new = (list_info_type *) xmalloc (sizeof (list_info_type));

      /* Detect if we are reading from stdin by examining the file
	 name returned by as_where().

	 [FIXME: We rely upon the name in the strcmp below being the
	 same as the one used by input_scrub_new_file(), if that is
	 not true, then this code will fail].

	 If we are reading from stdin, then we need to save each input line
	 here (assuming of course that we actually have a line of input to read),
	 so that it can be displayed in the listing that is produced at the end
	 of the assembly.  */
      if (strcmp (file, _("{standard input}")) == 0
	  && input_line_pointer != NULL)
	{
	  char * copy;
	  int len;
	  int seen_quote = 0;

	  for (copy = input_line_pointer - 1;
	       * copy && (seen_quote || (! is_end_of_line [* copy]));
	       copy ++)
	    if (* copy == '"' && copy[-1] != '\')
	      seen_quote = ! seen_quote;

	  len = (copy - input_line_pointer) + 2;

	  copy = xmalloc (len);

	  if (copy != NULL)
	    {
	      char * src = input_line_pointer - 1;
	      char * dest = copy;
	      
	      while (--len)
		{
		  char c = * src ++;

		  /* Omit control characters in the listing.  */
		  if (isascii (c) && ! iscntrl (c))
		    * dest ++ = c;
		}
	      
	      *dest = 0;
	    }
	  
	  new->line_contents = copy;
	}
      else
	new->line_contents = NULL;
    }
  else
    {
      new = (list_info_type *) xmalloc (sizeof (list_info_type));
      new->line_contents = ps;
    }

  last_line = line;
  last_file = file;
  
  new_frag ();

  if (listing_tail)
    listing_tail->next = new;
  else
    head = new;
  
  listing_tail = new;

  new->frag = frag_now;
  new->line = line;
  new->file = file_info (file);
  new->next = (list_info_type *) NULL;
  new->message = (char *) NULL;
  new->edict = EDICT_NONE;
  new->hll_file = (file_info_type *) NULL;
  new->hll_line = 0;
  new->debugging = 0;
  
  new_frag ();

#ifdef OBJ_ELF
  /* In ELF, anything in a section beginning with .debug or .line is
     considered to be debugging information.  */
  if ((listing & LISTING_NODEBUG) != 0)
    {
      const char *segname;

      segname = segment_name (now_seg);
      if (strncmp (segname, ".debug", sizeof ".debug" - 1) == 0
	  || strncmp (segname, ".line", sizeof ".line" - 1) == 0)
	new->debugging = 1;
    }
#endif
}

/* Attach all current frags to the previous line instead of the
   current line.  This is called by the MIPS backend when it discovers
   that it needs to add some NOP instructions; the added NOP
   instructions should go with the instruction that has the delay, not
   with the new instruction.  */

void
listing_prev_line ()
{
  list_info_type *l;
  fragS *f;

  if (head == (list_info_type *) NULL
      || head == listing_tail)
    return;

  new_frag ();

  for (l = head; l->next != listing_tail; l = l->next)
    ;

  for (f = frchain_now->frch_root; f != (fragS *) NULL; f = f->fr_next)
    if (f->line == listing_tail)
      f->line = l;

  listing_tail->frag = frag_now;
  new_frag ();
}

/*
 This function returns the next source line from the file supplied,
 truncated to size.  It appends a fake line to the end of each input
 file to make
*/

static char *
buffer_line (file, line, size)
     file_info_type * file;
     char *line;
     unsigned int size;
{
  unsigned int count = 0;
  int c;

  char *p = line;

  /* If we couldn't open the file, return an empty line */
  if (file->at_end)
    return "";

  /* Check the cache and see if we last used this file.  */
  if (!last_open_file_info || file != last_open_file_info)
    {
      if (last_open_file)
	{
	  last_open_file_info->pos = ftell (last_open_file);
	  fclose (last_open_file);
	}

      last_open_file_info = file;
      last_open_file = fopen (file->filename, "r");
      if (last_open_file == NULL)
	{
	  file->at_end = 1;
	  return "";
	}
      
      /* Seek to where we were last time this file was open.  */
      if (file->pos)
	fseek(last_open_file, file->pos, SEEK_SET);
    }

  c = fgetc (last_open_file);

  size -= 1;			/* leave room for null */

  while (c != EOF && c != '\n')
    {
      if (count < size)
	*p++ = c;
      count++;

      c = fgetc (last_open_file);

    }
  if (c == EOF)
    {
      file->at_end = 1;
      *p++ = '.';
      *p++ = '.';
      *p++ = '.';
    }
  file->linenum++;
  *p++ = 0;
  return line;
}


static const char *fn;

static unsigned int eject;	/* Eject pending */
static unsigned int page;	/* Current page number */
static char *title;		/* current title */
static char *subtitle;		/* current subtitle */
static unsigned int on_page;	/* number of lines printed on current page */


static void
listing_page (list)
     list_info_type *list;
{
  /* Grope around, see if we can see a title or subtitle edict coming up
     soon  (we look down 10 lines of the page and see if it's there)*/
  if ((eject || (on_page >= (unsigned int) paper_height)) && paper_height != 0)
    {
      unsigned int c = 10;
      int had_title = 0;
      int had_subtitle = 0;

      page++;

      while (c != 0 && list)
	{
	  if (list->edict == EDICT_SBTTL && !had_subtitle)
	    {
	      had_subtitle = 1;
	      subtitle = list->edict_arg;
	    }
	  if (list->edict == EDICT_TITLE && !had_title)
	    {
	      had_title = 1;
	      title = list->edict_arg;
	    }
	  list = list->next;
	  c--;
	}


      if (page > 1)
	{
	  fprintf (list_file, "\f");
	}

      fprintf (list_file, "%s %s \t\t\tpage %d\n", LISTING_HEADER, fn, page);
      fprintf (list_file, "%s\n", title);
      fprintf (list_file, "%s\n", subtitle);
      on_page = 3;
      eject = 0;
    }
}


static unsigned int
calc_hex (list)
     list_info_type * list;
{
  int data_buffer_size;
  list_info_type *first = list;
  unsigned int address = ~ (unsigned int) 0;
  fragS *frag;
  fragS *frag_ptr;
  unsigned int byte_in_frag;

  /* Find first frag which says it belongs to this line */
  frag = list->frag;
  while (frag && frag->line != list)
    frag = frag->fr_next;

  frag_ptr = frag;

  data_buffer_size = 0;

  /* Dump all the frags which belong to this line */
  while (frag_ptr != (fragS *) NULL && frag_ptr->line == first)
    {
      /* Print as many bytes from the fixed part as is sensible */
      byte_in_frag = 0;
      while ((offsetT) byte_in_frag < frag_ptr->fr_fix
	     && data_buffer_size < MAX_BYTES - 3)
	{
	  if (address == ~ (unsigned int) 0)
	    {
	      address = frag_ptr->fr_address;
	    }

	  sprintf (data_buffer + data_buffer_size,
		   "%02X",
		   (frag_ptr->fr_literal[byte_in_frag]) & 0xff);
	  data_buffer_size += 2;
	  byte_in_frag++;
	}
      {
	unsigned int var_rep_max = byte_in_frag;
	unsigned int var_rep_idx = byte_in_frag;

	/* Print as many bytes from the variable part as is sensible */
	while (((offsetT) byte_in_frag
		< frag_ptr->fr_fix + frag_ptr->fr_var * frag_ptr->fr_offset)
	       && data_buffer_size < MAX_BYTES - 3)
	  {
	    if (address == ~ (unsigned int) 0)
	      {
		address = frag_ptr->fr_address;
	      }
	    sprintf (data_buffer + data_buffer_size,
		     "%02X",
		     (frag_ptr->fr_literal[var_rep_idx]) & 0xff);
#if 0
	    data_buffer[data_buffer_size++] = '*';
	    data_buffer[data_buffer_size++] = '*';
#endif
	    data_buffer_size += 2;

	    var_rep_idx++;
	    byte_in_frag++;

	    if ((offsetT) var_rep_idx >= frag_ptr->fr_fix + frag_ptr->fr_var)
	      var_rep_idx = var_rep_max;
	  }
      }

      frag_ptr = frag_ptr->fr_next;
    }
  data_buffer[data_buffer_size] = '\0';
  return address;
}






static void
print_lines (list, lineno, string, address)
     list_info_type *list;
     unsigned int lineno;
     char *string;
     unsigned int address;
{
  unsigned int idx;
  unsigned int nchars;
  unsigned int lines;
  unsigned int byte_in_word = 0;
  char *src = data_buffer;

  /* Print the stuff on the first line */
  listing_page (list);
  nchars = (LISTING_WORD_SIZE * 2 + 1) * listing_lhs_width;
  
  /* Print the hex for the first line */
  if (address == ~ (unsigned int) 0)
    {
      fprintf (list_file, "% 4d     ", lineno);
      for (idx = 0; idx < nchars; idx++)
	fprintf (list_file, " ");

      fprintf (list_file, "\t%s\n", string ? string : "");
      
      on_page ++;
      
      listing_page (0);

      return;
    }

  if (had_errors ())
    fprintf (list_file, "% 4d ???? ", lineno);
  else
    fprintf (list_file, "% 4d %04x ", lineno, address);

  /* And the data to go along with it */
  idx = 0;
  
  while (*src && idx < nchars)
    {
      fprintf (list_file, "%c%c", src[0], src[1]);
      src += 2;
      byte_in_word++;
      
      if (byte_in_word == LISTING_WORD_SIZE)
	{
	  fprintf (list_file, " ");
	  idx++;
	  byte_in_word = 0;
	}
      
      idx += 2;
    }
  
  for (; idx < nchars; idx++)
    fprintf (list_file, " ");
  
  fprintf (list_file, "\t%s\n", string ? string : "");
  on_page++;
  listing_page (list);
  
  if (list->message)
    {
      fprintf (list_file, "****  %s\n", list->message);
      listing_page (list);
      on_page++;
    }
  
  for (lines = 0;
       lines < (unsigned int) listing_lhs_cont_lines
	 && *src;
       lines ++)
    {
      nchars = ((LISTING_WORD_SIZE * 2) + 1)
	* listing_lhs_width_second - 1;
      idx = 0;
      
      /* Print any more lines of data, but more compactly */
      fprintf (list_file, "% 4d      ", lineno);
      
      while (*src && idx < nchars)
	{
	  fprintf (list_file, "%c%c", src[0], src[1]);
	  src += 2;
	  idx += 2;
	  byte_in_word++;
	  
	  if (byte_in_word == LISTING_WORD_SIZE)
	    {
	      fprintf (list_file, " ");
	      idx++;
	      byte_in_word = 0;
	    }
	}
      
      fprintf (list_file, "\n");
      on_page ++;
      listing_page (list);
    }
}


static void
list_symbol_table ()
{
  extern symbolS *symbol_rootP;
  int got_some = 0;

  symbolS *ptr;
  eject = 1;
  listing_page (0);

  for (ptr = symbol_rootP; ptr != (symbolS *) NULL; ptr = symbol_next (ptr))
    {
      if (SEG_NORMAL (S_GET_SEGMENT (ptr))
	  || S_GET_SEGMENT (ptr) == absolute_section)
	{
#ifdef BFD_ASSEMBLER
	  /* Don't report section symbols.  They are not interesting.  */
	  if (ptr->bsym->flags & BSF_SECTION_SYM)
	    continue;
#endif
	  if (S_GET_NAME (ptr))
	    {
	      char buf[30], fmt[8];
	      valueT val = S_GET_VALUE (ptr);

	      /* @@ Note that this is dependent on the compilation options,
		 not solely on the target characteristics.  */
	      if (sizeof (val) == 4 && sizeof (int) == 4)
		sprintf (buf, "%08lx", (unsigned long) val);
	      else if (sizeof (val) <= sizeof (unsigned long))
		{
		  sprintf (fmt, "%%0%lulx",
			   (unsigned long) (sizeof (val) * 2));
		  sprintf (buf, fmt, (unsigned long) val);
		}
#if defined (BFD64)
	      else if (sizeof (val) > 4)
		sprintf_vma (buf, val);
#endif
	      else
		abort ();

	      if (!got_some)
		{
		  fprintf (list_file, "DEFINED SYMBOLS\n");
		  on_page++;
		  got_some = 1;
		}

	      if (ptr->sy_frag && ptr->sy_frag->line)
		{
		  fprintf (list_file, "%20s:%-5d  %s:%s %s\n",
			   ptr->sy_frag->line->file->filename,
			   ptr->sy_frag->line->line,
			   segment_name (S_GET_SEGMENT (ptr)),
			   buf, S_GET_NAME (ptr));
		}
	      else
		{
		  fprintf (list_file, "%33s:%s %s\n",
			   segment_name (S_GET_SEGMENT (ptr)),
			   buf, S_GET_NAME (ptr));
		}

	      on_page ++;
	      listing_page (0);
	    }
	}

    }
  if (!got_some)
    {
      fprintf (list_file, "NO DEFINED SYMBOLS\n");
      on_page++;
    }
  fprintf (list_file, "\n");
  on_page++;
  listing_page (0);

  got_some = 0;

  for (ptr = symbol_rootP; ptr != (symbolS *) NULL; ptr = symbol_next (ptr))
    {
      if (S_GET_NAME (ptr) && strlen (S_GET_NAME (ptr)) != 0)
	{
	  if (S_GET_SEGMENT (ptr) == undefined_section)
	    {
	      if (!got_some)
		{
		  got_some = 1;
		  fprintf (list_file, "UNDEFINED SYMBOLS\n");
		  on_page++;
		  listing_page (0);
		}
	      fprintf (list_file, "%s\n", S_GET_NAME (ptr));
	      on_page++;
	      listing_page (0);
	    }
	}
    }
  if (!got_some)
    {
      fprintf (list_file, "NO UNDEFINED SYMBOLS\n");
      on_page++;
      listing_page (0);
    }
}

static void
print_source (current_file, list, buffer, width)
     file_info_type *current_file;
     list_info_type *list;
     char *buffer;
     unsigned int width;
{
  if (!current_file->at_end)
    {
      while (current_file->linenum < list->hll_line
	     && !current_file->at_end)
	{
	  char *p = buffer_line (current_file, buffer, width);
	  fprintf (list_file, "%4u:%-13s **** %s\n", current_file->linenum,
		   current_file->filename, p);
	  on_page++;
	  listing_page (list);
	}
    }
}

/* Sometimes the user doesn't want to be bothered by the debugging
   records inserted by the compiler, see if the line is suspicious.  */

static int
debugging_pseudo (list, line)
     list_info_type *list;
     const char *line;
{
  static int in_debug;
  int was_debug;

  if (list->debugging)
    {
      in_debug = 1;
      return 1;
    }

  was_debug = in_debug;
  in_debug = 0;

  while (isspace ((unsigned char) *line))
    line++;

  if (*line != '.')
    {
#ifdef OBJ_ELF
      /* The ELF compiler sometimes emits blank lines after switching
         out of a debugging section.  If the next line drops us back
         into debugging information, then don't print the blank line.
         This is a hack for a particular compiler behaviour, not a
         general case.  */
      if (was_debug
	  && *line == '\0'
	  && list->next != NULL
	  && list->next->debugging)
	{
	  in_debug = 1;
	  return 1;
	}
#endif

      return 0;
    }

  line++;

  if (strncmp (line, "def", 3) == 0)
    return 1;
  if (strncmp (line, "val", 3) == 0)
    return 1;
  if (strncmp (line, "scl", 3) == 0)
    return 1;
  if (strncmp (line, "line", 4) == 0)
    return 1;
  if (strncmp (line, "endef", 5) == 0)
    return 1;
  if (strncmp (line, "ln", 2) == 0)
    return 1;
  if (strncmp (line, "type", 4) == 0)
    return 1;
  if (strncmp (line, "size", 4) == 0)
    return 1;
  if (strncmp (line, "dim", 3) == 0)
    return 1;
  if (strncmp (line, "tag", 3) == 0)
    return 1;

  if (strncmp (line, "stabs", 5) == 0)
    return 1;
  if (strncmp (line, "stabn", 5) == 0)
    return 1;

  return 0;
}

static void
listing_listing (name)
     char *name;
{
  list_info_type *list = head;
  file_info_type *current_hll_file = (file_info_type *) NULL;
  char *message;
  char *buffer;
  char *p;
  int show_listing = 1;
  unsigned int width;

  buffer = xmalloc (listing_rhs_width);
  data_buffer = xmalloc (MAX_BYTES);
  eject = 1;
  list = head;

  while (list != (list_info_type *) NULL && 0)
    {
      if (list->next)
	list->frag = list->next->frag;
      list = list->next;

    }

  list = head->next;


  while (list)
    {
      int list_line;

      width = listing_rhs_width > paper_width ? paper_width :
	listing_rhs_width;

      list_line = list->line;
      switch (list->edict)
	{
	case EDICT_LIST:
	  /* Skip all lines up to the current.  */
	  list_line--;
	  break;
	case EDICT_NOLIST:
	  show_listing--;
	  break;
	case EDICT_NOLIST_NEXT:
	  break;
	case EDICT_EJECT:
	  break;
	case EDICT_NONE:
	  break;
	case EDICT_TITLE:
	  title = list->edict_arg;
	  break;
	case EDICT_SBTTL:
	  subtitle = list->edict_arg;
	  break;
	default:
	  abort ();
	}

      if (show_listing <= 0)
	{
	  while (list->file->linenum < list_line
		 && !list->file->at_end)
	    p = buffer_line (list->file, buffer, width);
	}

      if (list->edict == EDICT_LIST)
	{
	  /* Enable listing for the single line that caused the enable.  */
	  list_line++;
	  show_listing++;
	}

      if (show_listing > 0)
	{
	  /* Scan down the list and print all the stuff which can be done
	     with this line (or lines).  */
	  message = 0;

	  if (list->hll_file)
	    {
	      current_hll_file = list->hll_file;
	    }

	  if (current_hll_file && list->hll_line && (listing & LISTING_HLL))
	    {
	      print_source (current_hll_file, list, buffer, width);
	    }

	  if (list->line_contents)
	    {
	      if (!((listing & LISTING_NODEBUG)
		    && debugging_pseudo (list, list->line_contents)))
		{
 		  print_lines (list,
			       list->file->linenum == 0 ? list->line : list->file->linenum,
			       list->line_contents, calc_hex (list));
		}
	      free (list->line_contents);
	      list->line_contents = NULL;
	    }
	  else
	    {
	      while (list->file->linenum < list_line
		     && !list->file->at_end)
		{
		  unsigned int address;

		  p = buffer_line (list->file, buffer, width);

		  if (list->file->linenum < list_line)
		    address = ~ (unsigned int) 0;
		  else
		    address = calc_hex (list);

		  if (!((listing & LISTING_NODEBUG)
			&& debugging_pseudo (list, p)))
		    print_lines (list, list->file->linenum, p, address);
		}
	    }

	  if (list->edict == EDICT_EJECT)
	    {
	      eject = 1;
	    }
	}

      if (list->edict == EDICT_NOLIST_NEXT)
	--show_listing;

      list = list->next;
    }

  free (buffer);
  free (data_buffer);
  data_buffer = NULL;
}

void
listing_print (name)
     char *name;
{
  int using_stdout;
  
  title = "";
  subtitle = "";

  if (name == NULL)
    {
      list_file = stdout;
      using_stdout = 1;
    }
  else
    {
      list_file = fopen (name, "w");
      if (list_file != NULL)
	using_stdout = 0;
      else
	{
	  as_perror (_("can't open list file: %s"), name);
	  list_file = stdout;
	  using_stdout = 1;
	}
    }

  if (listing & LISTING_NOFORM)
    {
      paper_height = 0;
    }

  if (listing & LISTING_LISTING)
    {
      listing_listing (name);
    }

  if (listing & LISTING_SYMBOLS)
    {
      list_symbol_table ();
    }

  if (! using_stdout)
    {
      if (fclose (list_file) == EOF)
	as_perror (_("error closing list file: %s"), name);
    }

  if (last_open_file)
    {
      fclose (last_open_file);
    }
}


void
listing_file (name)
     const char *name;
{
  fn = name;
}

void
listing_eject (ignore)
     int ignore;
{
  if (listing)
    listing_tail->edict = EDICT_EJECT;
}

void
listing_flags (ignore)
     int ignore;
{
  while ((*input_line_pointer++) && (*input_line_pointer != '\n'))
    input_line_pointer++;

}

/* Turn listing on or off.  An argument of 0 means to turn off
   listing.  An argument of 1 means to turn on listing.  An argument
   of 2 means to turn off listing, but as of the next line; that is,
   the current line should be listed, but the next line should not.  */

void
listing_list (on)
     int on;
{
  if (listing)
    {
      switch (on)
	{
	case 0:
	  if (listing_tail->edict == EDICT_LIST)
	    listing_tail->edict = EDICT_NONE;
	  else
	    listing_tail->edict = EDICT_NOLIST;
	  break;
	case 1:
	  if (listing_tail->edict == EDICT_NOLIST
	      || listing_tail->edict == EDICT_NOLIST_NEXT)
	    listing_tail->edict = EDICT_NONE;
	  else
	    listing_tail->edict = EDICT_LIST;
	  break;
	case 2:
	  listing_tail->edict = EDICT_NOLIST_NEXT;
	  break;
	default:
	  abort ();
	}
    }
}


void
listing_psize (width_only)
     int width_only;
{
  if (! width_only)
    {
      paper_height = get_absolute_expression ();

      if (paper_height < 0 || paper_height > 1000)
	{
	  paper_height = 0;
	  as_warn (_("strange paper height, set to no form"));
	}

      if (*input_line_pointer != ',')
	{
	  demand_empty_rest_of_line ();
	  return;
	}

      ++input_line_pointer;
    }

  paper_width = get_absolute_expression ();

  demand_empty_rest_of_line ();
}

void
listing_nopage (ignore)
     int ignore;
{
  paper_height = 0;
}

void
listing_title (depth)
     int depth;
{
  int quoted;
  char *start;
  char *ttl;
  unsigned int length;

  SKIP_WHITESPACE ();
  if (*input_line_pointer != '\"')
    quoted = 0;
  else
    {
      quoted = 1;
      ++input_line_pointer;
    }

  start = input_line_pointer;

  while (*input_line_pointer)
    {
      if (quoted
	  ? *input_line_pointer == '\"'
	  : is_end_of_line[(unsigned char) *input_line_pointer])
	{
	  if (listing)
	    {
	      length = input_line_pointer - start;
	      ttl = xmalloc (length + 1);
	      memcpy (ttl, start, length);
	      ttl[length] = 0;
	      listing_tail->edict = depth ? EDICT_SBTTL : EDICT_TITLE;
	      listing_tail->edict_arg = ttl;
	    }
	  if (quoted)
	    input_line_pointer++;
	  demand_empty_rest_of_line ();
	  return;
	}
      else if (*input_line_pointer == '\n')
	{
	  as_bad (_("New line in title"));
	  demand_empty_rest_of_line ();
	  return;
	}
      else
	{
	  input_line_pointer++;
	}
    }
}



void
listing_source_line (line)
     unsigned int line;
{
  if (listing)
    {
      new_frag ();
      listing_tail->hll_line = line;
      new_frag ();
    }
}

void
listing_source_file (file)
     const char *file;
{
  if (listing)
    listing_tail->hll_file = file_info (file);
}



#else


/* Dummy functions for when compiled without listing enabled */

void
listing_flags (ignore)
     int ignore;
{
  s_ignore (0);
}

void 
listing_list (on)
     int on;
{
  s_ignore (0);
}

void 
listing_eject (ignore)
     int ignore;
{
  s_ignore (0);
}

void 
listing_psize (ignore)
     int ignore;
{
  s_ignore (0);
}

void
listing_nopage (ignore)
     int ignore;
{
  s_ignore (0);
}

void 
listing_title (depth)
     int depth;
{
  s_ignore (0);
}

void
listing_file (name)
     const char *name;
{

}

void 
listing_newline (name)
     char *name;
{

}

void 
listing_source_line (n)
     unsigned int n;
{

}
void 
listing_source_file (n)
     const char *n;
{

}

#endif