File: as.c

package info (click to toggle)
binutils 2.31.1-16
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 309,412 kB
  • sloc: ansic: 1,161,194; asm: 638,508; cpp: 128,829; exp: 68,580; makefile: 55,828; sh: 22,360; yacc: 14,238; lisp: 13,272; perl: 2,111; ada: 1,681; lex: 1,652; pascal: 1,446; cs: 879; sed: 195; python: 154; xml: 95; awk: 25
file content (1427 lines) | stat: -rw-r--r-- 40,422 bytes parent folder | download | duplicates (5)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
/* as.c - GAS main program.
   Copyright (C) 1987-2018 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 3, 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, 51 Franklin Street - Fifth Floor, Boston, MA
   02110-1301, USA.  */

/* Main program for AS; a 32-bit assembler of GNU.
   Understands command arguments.
   Has a few routines that don't fit in other modules because they
   are shared.

  			bugs

   : initialisers
  	Since no-one else says they will support them in future: I
   don't support them now.  */

#define COMMON

/* Disable code to set FAKE_LABEL_NAME in obj-multi.h, to avoid circular
   reference.  */
#define INITIALIZING_EMULS

#include "as.h"
#include "subsegs.h"
#include "output-file.h"
#include "sb.h"
#include "macro.h"
#include "dwarf2dbg.h"
#include "dw2gencfi.h"
#include "bfdver.h"
#include "write.h"

#ifdef HAVE_ITBL_CPU
#include "itbl-ops.h"
#else
#define itbl_init()
#endif

#ifdef USING_CGEN
/* Perform any cgen specific initialisation for gas.  */
extern void gas_cgen_begin (void);
#endif

/* We build a list of defsyms as we read the options, and then define
   them after we have initialized everything.  */
struct defsym_list
{
  struct defsym_list *next;
  char *name;
  valueT value;
};


/* True if a listing is wanted.  */
int listing;

/* Type of debugging to generate.  */
enum debug_info_type debug_type = DEBUG_UNSPECIFIED;
int use_gnu_debug_info_extensions = 0;

#ifndef MD_DEBUG_FORMAT_SELECTOR
#define MD_DEBUG_FORMAT_SELECTOR NULL
#endif
static enum debug_info_type (*md_debug_format_selector) (int *) = MD_DEBUG_FORMAT_SELECTOR;

/* Maximum level of macro nesting.  */
int max_macro_nest = 100;

/* argv[0]  */
static char * myname;

/* The default obstack chunk size.  If we set this to zero, the
   obstack code will use whatever will fit in a 4096 byte block.  */
int chunksize = 0;

/* To monitor memory allocation more effectively, make this non-zero.
   Then the chunk sizes for gas and bfd will be reduced.  */
int debug_memory = 0;

/* Enable verbose mode.  */
int verbose = 0;

#if defined OBJ_ELF || defined OBJ_MAYBE_ELF
int flag_use_elf_stt_common = DEFAULT_GENERATE_ELF_STT_COMMON;
bfd_boolean flag_generate_build_notes = DEFAULT_GENERATE_BUILD_NOTES;
#endif

/* Keep the output file.  */
static int keep_it = 0;

segT reg_section;
segT expr_section;
segT text_section;
segT data_section;
segT bss_section;

/* Name of listing file.  */
static char *listing_filename = NULL;

static struct defsym_list *defsyms;

#ifdef HAVE_ITBL_CPU
/* Keep a record of the itbl files we read in.  */
struct itbl_file_list
{
  struct itbl_file_list *next;
  char *name;
};
static struct itbl_file_list *itbl_files;
#endif

static long start_time;

static int flag_macro_alternate;


#ifdef USE_EMULATIONS
#define EMULATION_ENVIRON "AS_EMULATION"

extern struct emulation mipsbelf, mipslelf, mipself;
extern struct emulation i386coff, i386elf, i386aout;
extern struct emulation crisaout, criself;

static struct emulation *const emulations[] = { EMULATIONS };
static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]);

static void
select_emulation_mode (int argc, char **argv)
{
  int i;
  char *p;
  const char *em = NULL;

  for (i = 1; i < argc; i++)
    if (!strncmp ("--em", argv[i], 4))
      break;

  if (i == argc)
    goto do_default;

  p = strchr (argv[i], '=');
  if (p)
    p++;
  else
    p = argv[i + 1];

  if (!p || !*p)
    as_fatal (_("missing emulation mode name"));
  em = p;

 do_default:
  if (em == 0)
    em = getenv (EMULATION_ENVIRON);
  if (em == 0)
    em = DEFAULT_EMULATION;

  if (em)
    {
      for (i = 0; i < n_emulations; i++)
	if (!strcmp (emulations[i]->name, em))
	  break;
      if (i == n_emulations)
	as_fatal (_("unrecognized emulation name `%s'"), em);
      this_emulation = emulations[i];
    }
  else
    this_emulation = emulations[0];

  this_emulation->init ();
}

const char *
default_emul_bfd_name (void)
{
  abort ();
  return NULL;
}

void
common_emul_init (void)
{
  this_format = this_emulation->format;

  if (this_emulation->leading_underscore == 2)
    this_emulation->leading_underscore = this_format->dfl_leading_underscore;

  if (this_emulation->default_endian != 2)
    target_big_endian = this_emulation->default_endian;

  if (this_emulation->fake_label_name == 0)
    {
      if (this_emulation->leading_underscore)
	this_emulation->fake_label_name = FAKE_LABEL_NAME;
      else
	/* What other parameters should we test?  */
	this_emulation->fake_label_name = "." FAKE_LABEL_NAME;
    }
}
#endif

void
print_version_id (void)
{
  static int printed;

  if (printed)
    return;
  printed = 1;

  fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s\n"),
	   VERSION, TARGET_ALIAS, BFD_VERSION_STRING);
}

#ifdef DEFAULT_FLAG_COMPRESS_DEBUG
enum compressed_debug_section_type flag_compress_debug
  = COMPRESS_DEBUG_GABI_ZLIB;
#endif

static void
show_usage (FILE * stream)
{
  fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname);

  fprintf (stream, _("\
Options:\n\
  -a[sub-option...]	  turn on listings\n\
                      	  Sub-options [default hls]:\n\
                      	  c      omit false conditionals\n\
                      	  d      omit debugging directives\n\
                      	  g      include general info\n\
                      	  h      include high-level source\n\
                      	  l      include assembly\n\
                      	  m      include macro expansions\n\
                      	  n      omit forms processing\n\
                      	  s      include symbols\n\
                      	  =FILE  list to FILE (must be last sub-option)\n"));

  fprintf (stream, _("\
  --alternate             initially turn on alternate macro syntax\n"));
#ifdef DEFAULT_FLAG_COMPRESS_DEBUG
  fprintf (stream, _("\
  --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
                          compress DWARF debug sections using zlib [default]\n"));
  fprintf (stream, _("\
  --nocompress-debug-sections\n\
                          don't compress DWARF debug sections\n"));
#else
  fprintf (stream, _("\
  --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
                          compress DWARF debug sections using zlib\n"));
  fprintf (stream, _("\
  --nocompress-debug-sections\n\
                          don't compress DWARF debug sections [default]\n"));
#endif
  fprintf (stream, _("\
  -D                      produce assembler debugging messages\n"));
  fprintf (stream, _("\
  --debug-prefix-map OLD=NEW\n\
                          map OLD to NEW in debug information\n"));
  fprintf (stream, _("\
  --defsym SYM=VAL        define symbol SYM to given value\n"));
#ifdef USE_EMULATIONS
  {
    int i;
    const char *def_em;

    fprintf (stream, "\
  --em=[");
    for (i = 0; i < n_emulations - 1; i++)
      fprintf (stream, "%s | ", emulations[i]->name);
    fprintf (stream, "%s]\n", emulations[i]->name);

    def_em = getenv (EMULATION_ENVIRON);
    if (!def_em)
      def_em = DEFAULT_EMULATION;
    fprintf (stream, _("\
                          emulate output (default %s)\n"), def_em);
  }
#endif
#if defined OBJ_ELF || defined OBJ_MAYBE_ELF
  fprintf (stream, _("\
  --execstack             require executable stack for this object\n"));
  fprintf (stream, _("\
  --noexecstack           don't require executable stack for this object\n"));
  fprintf (stream, _("\
  --size-check=[error|warning]\n\
			  ELF .size directive check (default --size-check=error)\n"));
  fprintf (stream, _("\
  --elf-stt-common=[no|yes]\n\
                          generate ELF common symbols with STT_COMMON type\n"));
  fprintf (stream, _("\
  --sectname-subst        enable section name substitution sequences\n"));

  fprintf (stream, _("\
  --generate-missing-build-notes=[no|yes] "));
#if DEFAULT_GENERATE_BUILD_NOTES
  fprintf (stream, _("(default: yes)\n"));
#else
  fprintf (stream, _("(default: no)\n"));
#endif
  fprintf (stream, _("\
                          generate GNU Build notes if none are present in the input\n"));
#endif /* OBJ_ELF */

  fprintf (stream, _("\
  -f                      skip whitespace and comment preprocessing\n"));
  fprintf (stream, _("\
  -g --gen-debug          generate debugging information\n"));
  fprintf (stream, _("\
  --gstabs                generate STABS debugging information\n"));
  fprintf (stream, _("\
  --gstabs+               generate STABS debug info with GNU extensions\n"));
  fprintf (stream, _("\
  --gdwarf-2              generate DWARF2 debugging information\n"));
  fprintf (stream, _("\
  --gdwarf-sections       generate per-function section names for DWARF line information\n"));
  fprintf (stream, _("\
  --hash-size=<value>     set the hash table size close to <value>\n"));
  fprintf (stream, _("\
  --help                  show this message and exit\n"));
  fprintf (stream, _("\
  --target-help           show target specific options\n"));
  fprintf (stream, _("\
  -I DIR                  add DIR to search list for .include directives\n"));
  fprintf (stream, _("\
  -J                      don't warn about signed overflow\n"));
  fprintf (stream, _("\
  -K                      warn when differences altered for long displacements\n"));
  fprintf (stream, _("\
  -L,--keep-locals        keep local symbols (e.g. starting with `L')\n"));
  fprintf (stream, _("\
  -M,--mri                assemble in MRI compatibility mode\n"));
  fprintf (stream, _("\
  --MD FILE               write dependency information in FILE (default none)\n"));
  fprintf (stream, _("\
  -nocpp                  ignored\n"));
  fprintf (stream, _("\
  -no-pad-sections        do not pad the end of sections to alignment boundaries\n"));
  fprintf (stream, _("\
  -o OBJFILE              name the object-file output OBJFILE (default a.out)\n"));
  fprintf (stream, _("\
  -R                      fold data section into text section\n"));
  fprintf (stream, _("\
  --reduce-memory-overheads \n\
                          prefer smaller memory use at the cost of longer\n\
                          assembly times\n"));
  fprintf (stream, _("\
  --statistics            print various measured statistics from execution\n"));
  fprintf (stream, _("\
  --strip-local-absolute  strip local absolute symbols\n"));
  fprintf (stream, _("\
  --traditional-format    Use same format as native assembler when possible\n"));
  fprintf (stream, _("\
  --version               print assembler version number and exit\n"));
  fprintf (stream, _("\
  -W  --no-warn           suppress warnings\n"));
  fprintf (stream, _("\
  --warn                  don't suppress warnings\n"));
  fprintf (stream, _("\
  --fatal-warnings        treat warnings as errors\n"));
#ifdef HAVE_ITBL_CPU
  fprintf (stream, _("\
  --itbl INSTTBL          extend instruction set to include instructions\n\
                          matching the specifications defined in file INSTTBL\n"));
#endif
  fprintf (stream, _("\
  -w                      ignored\n"));
  fprintf (stream, _("\
  -X                      ignored\n"));
  fprintf (stream, _("\
  -Z                      generate object file even after errors\n"));
  fprintf (stream, _("\
  --listing-lhs-width     set the width in words of the output data column of\n\
                          the listing\n"));
  fprintf (stream, _("\
  --listing-lhs-width2    set the width in words of the continuation lines\n\
                          of the output data column; ignored if smaller than\n\
                          the width of the first line\n"));
  fprintf (stream, _("\
  --listing-rhs-width     set the max width in characters of the lines from\n\
                          the source file\n"));
  fprintf (stream, _("\
  --listing-cont-lines    set the maximum number of continuation lines used\n\
                          for the output data column of the listing\n"));
  fprintf (stream, _("\
  @FILE                   read options from FILE\n"));

  md_show_usage (stream);

  fputc ('\n', stream);

  if (REPORT_BUGS_TO[0] && stream == stdout)
    fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
}

/* Since it is easy to do here we interpret the special arg "-"
   to mean "use stdin" and we set that argv[] pointing to "".
   After we have munged argv[], the only things left are source file
   name(s) and ""(s) denoting stdin. These file names are used
   (perhaps more than once) later.

   check for new machine-dep cmdline options in
   md_parse_option definitions in config/tc-*.c.  */

static void
parse_args (int * pargc, char *** pargv)
{
  int old_argc;
  int new_argc;
  char ** old_argv;
  char ** new_argv;
  /* Starting the short option string with '-' is for programs that
     expect options and other ARGV-elements in any order and that care about
     the ordering of the two.  We describe each non-option ARGV-element
     as if it were the argument of an option with character code 1.  */
  char *shortopts;
  extern const char *md_shortopts;
  static const char std_shortopts[] =
  {
    '-', 'J',
#ifndef WORKING_DOT_WORD
    /* -K is not meaningful if .word is not being hacked.  */
    'K',
#endif
    'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
#ifndef VMS
    /* -v takes an argument on VMS, so we don't make it a generic
       option.  */
    'v',
#endif
    'w', 'X',
#ifdef HAVE_ITBL_CPU
    /* New option for extending instruction set (see also --itbl below).  */
    't', ':',
#endif
    '\0'
  };
  struct option *longopts;
  extern struct option md_longopts[];
  extern size_t md_longopts_size;
  /* Codes used for the long options with no short synonyms.  */
  enum option_values
    {
      OPTION_HELP = OPTION_STD_BASE,
      OPTION_NOCPP,
      OPTION_STATISTICS,
      OPTION_VERSION,
      OPTION_DUMPCONFIG,
      OPTION_VERBOSE,
      OPTION_EMULATION,
      OPTION_DEBUG_PREFIX_MAP,
      OPTION_DEFSYM,
      OPTION_LISTING_LHS_WIDTH,
      OPTION_LISTING_LHS_WIDTH2,
      OPTION_LISTING_RHS_WIDTH,
      OPTION_LISTING_CONT_LINES,
      OPTION_DEPFILE,
      OPTION_GSTABS,
      OPTION_GSTABS_PLUS,
      OPTION_GDWARF2,
      OPTION_GDWARF_SECTIONS,
      OPTION_STRIP_LOCAL_ABSOLUTE,
      OPTION_TRADITIONAL_FORMAT,
      OPTION_WARN,
      OPTION_TARGET_HELP,
      OPTION_EXECSTACK,
      OPTION_NOEXECSTACK,
      OPTION_SIZE_CHECK,
      OPTION_ELF_STT_COMMON,
      OPTION_ELF_BUILD_NOTES,
      OPTION_SECTNAME_SUBST,
      OPTION_ALTERNATE,
      OPTION_AL,
      OPTION_HASH_TABLE_SIZE,
      OPTION_REDUCE_MEMORY_OVERHEADS,
      OPTION_WARN_FATAL,
      OPTION_COMPRESS_DEBUG,
      OPTION_NOCOMPRESS_DEBUG,
      OPTION_NO_PAD_SECTIONS /* = STD_BASE + 40 */
    /* When you add options here, check that they do
       not collide with OPTION_MD_BASE.  See as.h.  */
    };

  static const struct option std_longopts[] =
  {
    /* Note: commas are placed at the start of the line rather than
       the end of the preceding line so that it is simpler to
       selectively add and remove lines from this list.  */
    {"alternate", no_argument, NULL, OPTION_ALTERNATE}
    /* The entry for "a" is here to prevent getopt_long_only() from
       considering that -a is an abbreviation for --alternate.  This is
       necessary because -a=<FILE> is a valid switch but getopt would
       normally reject it since --alternate does not take an argument.  */
    ,{"a", optional_argument, NULL, 'a'}
    /* Handle -al=<FILE>.  */
    ,{"al", optional_argument, NULL, OPTION_AL}
    ,{"compress-debug-sections", optional_argument, NULL, OPTION_COMPRESS_DEBUG}
    ,{"nocompress-debug-sections", no_argument, NULL, OPTION_NOCOMPRESS_DEBUG}
    ,{"debug-prefix-map", required_argument, NULL, OPTION_DEBUG_PREFIX_MAP}
    ,{"defsym", required_argument, NULL, OPTION_DEFSYM}
    ,{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG}
    ,{"emulation", required_argument, NULL, OPTION_EMULATION}
#if defined OBJ_ELF || defined OBJ_MAYBE_ELF
    ,{"execstack", no_argument, NULL, OPTION_EXECSTACK}
    ,{"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK}
    ,{"size-check", required_argument, NULL, OPTION_SIZE_CHECK}
    ,{"elf-stt-common", required_argument, NULL, OPTION_ELF_STT_COMMON}
    ,{"sectname-subst", no_argument, NULL, OPTION_SECTNAME_SUBST}
    ,{"generate-missing-build-notes", required_argument, NULL, OPTION_ELF_BUILD_NOTES}
#endif
    ,{"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL}
    ,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF2}
    /* GCC uses --gdwarf-2 but GAS uses to use --gdwarf2,
       so we keep it here for backwards compatibility.  */
    ,{"gdwarf2", no_argument, NULL, OPTION_GDWARF2}
    ,{"gdwarf-sections", no_argument, NULL, OPTION_GDWARF_SECTIONS}
    ,{"gen-debug", no_argument, NULL, 'g'}
    ,{"gstabs", no_argument, NULL, OPTION_GSTABS}
    ,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS}
    ,{"hash-size", required_argument, NULL, OPTION_HASH_TABLE_SIZE}
    ,{"help", no_argument, NULL, OPTION_HELP}
#ifdef HAVE_ITBL_CPU
    /* New option for extending instruction set (see also -t above).
       The "-t file" or "--itbl file" option extends the basic set of
       valid instructions by reading "file", a text file containing a
       list of instruction formats.  The additional opcodes and their
       formats are added to the built-in set of instructions, and
       mnemonics for new registers may also be defined.  */
    ,{"itbl", required_argument, NULL, 't'}
#endif
    /* getopt allows abbreviations, so we do this to stop it from
       treating -k as an abbreviation for --keep-locals.  Some
       ports use -k to enable PIC assembly.  */
    ,{"keep-locals", no_argument, NULL, 'L'}
    ,{"keep-locals", no_argument, NULL, 'L'}
    ,{"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH}
    ,{"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2}
    ,{"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH}
    ,{"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES}
    ,{"MD", required_argument, NULL, OPTION_DEPFILE}
    ,{"mri", no_argument, NULL, 'M'}
    ,{"nocpp", no_argument, NULL, OPTION_NOCPP}
    ,{"no-pad-sections", no_argument, NULL, OPTION_NO_PAD_SECTIONS}
    ,{"no-warn", no_argument, NULL, 'W'}
    ,{"reduce-memory-overheads", no_argument, NULL, OPTION_REDUCE_MEMORY_OVERHEADS}
    ,{"statistics", no_argument, NULL, OPTION_STATISTICS}
    ,{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE}
    ,{"version", no_argument, NULL, OPTION_VERSION}
    ,{"verbose", no_argument, NULL, OPTION_VERBOSE}
    ,{"target-help", no_argument, NULL, OPTION_TARGET_HELP}
    ,{"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT}
    ,{"warn", no_argument, NULL, OPTION_WARN}
  };

  /* Construct the option lists from the standard list and the target
     dependent list.  Include space for an extra NULL option and
     always NULL terminate.  */
  shortopts = concat (std_shortopts, md_shortopts, (char *) NULL);
  longopts = (struct option *) xmalloc (sizeof (std_longopts)
                                        + md_longopts_size + sizeof (struct option));
  memcpy (longopts, std_longopts, sizeof (std_longopts));
  memcpy (((char *) longopts) + sizeof (std_longopts), md_longopts, md_longopts_size);
  memset (((char *) longopts) + sizeof (std_longopts) + md_longopts_size,
	  0, sizeof (struct option));

  /* Make a local copy of the old argv.  */
  old_argc = *pargc;
  old_argv = *pargv;

  /* Initialize a new argv that contains no options.  */
  new_argv = XNEWVEC (char *, old_argc + 1);
  new_argv[0] = old_argv[0];
  new_argc = 1;
  new_argv[new_argc] = NULL;

  while (1)
    {
      /* getopt_long_only is like getopt_long, but '-' as well as '--' can
	 indicate a long option.  */
      int longind;
      int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts,
				   &longind);

      if (optc == -1)
	break;

      switch (optc)
	{
	default:
	  /* md_parse_option should return 1 if it recognizes optc,
	     0 if not.  */
	  if (md_parse_option (optc, optarg) != 0)
	    break;
	  /* `-v' isn't included in the general short_opts list, so check for
	     it explicitly here before deciding we've gotten a bad argument.  */
	  if (optc == 'v')
	    {
#ifdef VMS
	      /* Telling getopt to treat -v's value as optional can result
		 in it picking up a following filename argument here.  The
		 VMS code in md_parse_option can return 0 in that case,
		 but it has no way of pushing the filename argument back.  */
	      if (optarg && *optarg)
		new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL;
	      else
#else
	      case 'v':
#endif
	      case OPTION_VERBOSE:
		print_version_id ();
		verbose = 1;
	      break;
	    }
	  else
	    as_bad (_("unrecognized option -%c%s"), optc, optarg ? optarg : "");
	  /* Fall through.  */

	case '?':
	  exit (EXIT_FAILURE);

	case 1:			/* File name.  */
	  if (!strcmp (optarg, "-"))
	    optarg = (char *) "";
	  new_argv[new_argc++] = optarg;
	  new_argv[new_argc] = NULL;
	  break;

	case OPTION_TARGET_HELP:
	  md_show_usage (stdout);
	  exit (EXIT_SUCCESS);

	case OPTION_HELP:
	  show_usage (stdout);
	  exit (EXIT_SUCCESS);

	case OPTION_NOCPP:
	  break;

	case OPTION_NO_PAD_SECTIONS:
	  do_not_pad_sections_to_alignment = 1;
	  break;

	case OPTION_STATISTICS:
	  flag_print_statistics = 1;
	  break;

	case OPTION_STRIP_LOCAL_ABSOLUTE:
	  flag_strip_local_absolute = 1;
	  break;

	case OPTION_TRADITIONAL_FORMAT:
	  flag_traditional_format = 1;
	  break;

	case OPTION_VERSION:
	  /* This output is intended to follow the GNU standards document.  */
	  printf (_("GNU assembler %s\n"), BFD_VERSION_STRING);
	  printf (_("Copyright (C) 2018 Free Software Foundation, Inc.\n"));
	  printf (_("\
This program is free software; you may redistribute it under the terms of\n\
the GNU General Public License version 3 or later.\n\
This program has absolutely no warranty.\n"));
#ifdef TARGET_WITH_CPU
	  printf (_("This assembler was configured for a target of `%s' "
		    "and default,\ncpu type `%s'.\n"),
		  TARGET_ALIAS, TARGET_WITH_CPU);
#else
	  printf (_("This assembler was configured for a target of `%s'.\n"),
		  TARGET_ALIAS);
#endif
	  exit (EXIT_SUCCESS);

	case OPTION_EMULATION:
#ifdef USE_EMULATIONS
	  if (strcmp (optarg, this_emulation->name))
	    as_fatal (_("multiple emulation names specified"));
#else
	  as_fatal (_("emulations not handled in this configuration"));
#endif
	  break;

	case OPTION_DUMPCONFIG:
	  fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS);
	  fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL);
	  fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU);
#ifdef TARGET_OBJ_FORMAT
	  fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT);
#endif
#ifdef TARGET_FORMAT
	  fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT);
#endif
	  exit (EXIT_SUCCESS);

	case OPTION_COMPRESS_DEBUG:
	  if (optarg)
	    {
#if defined OBJ_ELF || defined OBJ_MAYBE_ELF
	      if (strcasecmp (optarg, "none") == 0)
		flag_compress_debug = COMPRESS_DEBUG_NONE;
	      else if (strcasecmp (optarg, "zlib") == 0)
		flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
	      else if (strcasecmp (optarg, "zlib-gnu") == 0)
		flag_compress_debug = COMPRESS_DEBUG_GNU_ZLIB;
	      else if (strcasecmp (optarg, "zlib-gabi") == 0)
		flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
	      else
		as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
			  optarg);
#else
	      as_fatal (_("--compress-debug-sections=%s is unsupported"),
			optarg);
#endif
	    }
	  else
	    flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
	  break;

	case OPTION_NOCOMPRESS_DEBUG:
	  flag_compress_debug = COMPRESS_DEBUG_NONE;
	  break;

	case OPTION_DEBUG_PREFIX_MAP:
	  add_debug_prefix_map (optarg);
	  break;

	case OPTION_DEFSYM:
	  {
	    char *s;
	    valueT i;
	    struct defsym_list *n;

	    for (s = optarg; *s != '\0' && *s != '='; s++)
	      ;
	    if (*s == '\0')
	      as_fatal (_("bad defsym; format is --defsym name=value"));
	    *s++ = '\0';
	    i = bfd_scan_vma (s, (const char **) NULL, 0);
	    n = XNEW (struct defsym_list);
	    n->next = defsyms;
	    n->name = optarg;
	    n->value = i;
	    defsyms = n;
	  }
	  break;

#ifdef HAVE_ITBL_CPU
	case 't':
	  {
	    /* optarg is the name of the file containing the instruction
	       formats, opcodes, register names, etc.  */
	    struct itbl_file_list *n;

	    if (optarg == NULL)
	      {
		as_warn (_("no file name following -t option"));
		break;
	      }

	    n = XNEW (struct itbl_file_list);
	    n->next = itbl_files;
	    n->name = optarg;
	    itbl_files = n;

	    /* Parse the file and add the new instructions to our internal
	       table.  If multiple instruction tables are specified, the
	       information from this table gets appended onto the existing
	       internal table.  */
	    itbl_files->name = xstrdup (optarg);
	    if (itbl_parse (itbl_files->name) != 0)
	      as_fatal (_("failed to read instruction table %s\n"),
			itbl_files->name);
	  }
	  break;
#endif

	case OPTION_DEPFILE:
	  start_dependencies (optarg);
	  break;

	case 'g':
	  /* Some backends, eg Alpha and Mips, use the -g switch for their
	     own purposes.  So we check here for an explicit -g and allow
	     the backend to decide if it wants to process it.  */
	  if (   old_argv[optind - 1][1] == 'g'
	      && md_parse_option (optc, optarg))
	    continue;

	  if (md_debug_format_selector)
	    debug_type = md_debug_format_selector (& use_gnu_debug_info_extensions);
	  else if (IS_ELF)
	    debug_type = DEBUG_DWARF2;
	  else
	    debug_type = DEBUG_STABS;
	  break;

	case OPTION_GSTABS_PLUS:
	  use_gnu_debug_info_extensions = 1;
	  /* Fall through.  */
	case OPTION_GSTABS:
	  debug_type = DEBUG_STABS;
	  break;

	case OPTION_GDWARF2:
	  debug_type = DEBUG_DWARF2;
	  break;

	case OPTION_GDWARF_SECTIONS:
	  flag_dwarf_sections = TRUE;
	  break;

	case 'J':
	  flag_signed_overflow_ok = 1;
	  break;

#ifndef WORKING_DOT_WORD
	case 'K':
	  flag_warn_displacement = 1;
	  break;
#endif
	case 'L':
	  flag_keep_locals = 1;
	  break;

	case OPTION_LISTING_LHS_WIDTH:
	  listing_lhs_width = atoi (optarg);
	  if (listing_lhs_width_second < listing_lhs_width)
	    listing_lhs_width_second = listing_lhs_width;
	  break;
	case OPTION_LISTING_LHS_WIDTH2:
	  {
	    int tmp = atoi (optarg);

	    if (tmp > listing_lhs_width)
	      listing_lhs_width_second = tmp;
	  }
	  break;
	case OPTION_LISTING_RHS_WIDTH:
	  listing_rhs_width = atoi (optarg);
	  break;
	case OPTION_LISTING_CONT_LINES:
	  listing_lhs_cont_lines = atoi (optarg);
	  break;

	case 'M':
	  flag_mri = 1;
#ifdef TC_M68K
	  flag_m68k_mri = 1;
#endif
	  break;

	case 'R':
	  flag_readonly_data_in_text = 1;
	  break;

	case 'W':
	  flag_no_warnings = 1;
	  break;

	case OPTION_WARN:
	  flag_no_warnings = 0;
	  flag_fatal_warnings = 0;
	  break;

	case OPTION_WARN_FATAL:
	  flag_no_warnings = 0;
	  flag_fatal_warnings = 1;
	  break;

#if defined OBJ_ELF || defined OBJ_MAYBE_ELF
	case OPTION_EXECSTACK:
	  flag_execstack = 1;
	  flag_noexecstack = 0;
	  break;

	case OPTION_NOEXECSTACK:
	  flag_noexecstack = 1;
	  flag_execstack = 0;
	  break;

	case OPTION_SIZE_CHECK:
	  if (strcasecmp (optarg, "error") == 0)
	    flag_allow_nonconst_size = FALSE;
	  else if (strcasecmp (optarg, "warning") == 0)
	    flag_allow_nonconst_size = TRUE;
	  else
	    as_fatal (_("Invalid --size-check= option: `%s'"), optarg);
	  break;

	case OPTION_ELF_STT_COMMON:
	  if (strcasecmp (optarg, "no") == 0)
	    flag_use_elf_stt_common = 0;
	  else if (strcasecmp (optarg, "yes") == 0)
	    flag_use_elf_stt_common = 1;
	  else
	    as_fatal (_("Invalid --elf-stt-common= option: `%s'"),
		      optarg);
	  break;

	case OPTION_SECTNAME_SUBST:
	  flag_sectname_subst = 1;
	  break;

	case OPTION_ELF_BUILD_NOTES:
	  if (strcasecmp (optarg, "no") == 0)
	    flag_generate_build_notes = FALSE;
	  else if (strcasecmp (optarg, "yes") == 0)
	    flag_generate_build_notes = TRUE;
	  else
	    as_fatal (_("Invalid --generate-missing-build-notes option: `%s'"),
		      optarg);
	  break;

#endif /* OBJ_ELF */

	case 'Z':
	  flag_always_generate_output = 1;
	  break;

 	case OPTION_AL:
	  listing |= LISTING_LISTING;
	  if (optarg)
	    listing_filename = xstrdup (optarg);
	  break;

 	case OPTION_ALTERNATE:
 	  optarg = old_argv [optind - 1];
 	  while (* optarg == '-')
 	    optarg ++;

 	  if (strcmp (optarg, "alternate") == 0)
 	    {
 	      flag_macro_alternate = 1;
 	      break;
 	    }
 	  optarg ++;
 	  /* Fall through.  */

	case 'a':
	  if (optarg)
	    {
	      if (optarg != old_argv[optind] && optarg[-1] == '=')
		--optarg;

	      if (md_parse_option (optc, optarg) != 0)
		break;

	      while (*optarg)
		{
		  switch (*optarg)
		    {
		    case 'c':
		      listing |= LISTING_NOCOND;
		      break;
		    case 'd':
		      listing |= LISTING_NODEBUG;
		      break;
		    case 'g':
		      listing |= LISTING_GENERAL;
		      break;
		    case 'h':
		      listing |= LISTING_HLL;
		      break;
		    case 'l':
		      listing |= LISTING_LISTING;
		      break;
		    case 'm':
		      listing |= LISTING_MACEXP;
		      break;
		    case 'n':
		      listing |= LISTING_NOFORM;
		      break;
		    case 's':
		      listing |= LISTING_SYMBOLS;
		      break;
		    case '=':
		      listing_filename = xstrdup (optarg + 1);
		      optarg += strlen (listing_filename);
		      break;
		    default:
		      as_fatal (_("invalid listing option `%c'"), *optarg);
		      break;
		    }
		  optarg++;
		}
	    }
	  if (!listing)
	    listing = LISTING_DEFAULT;
	  break;

	case 'D':
	  /* DEBUG is implemented: it debugs different
	     things from other people's assemblers.  */
	  flag_debug = 1;
	  break;

	case 'f':
	  flag_no_comments = 1;
	  break;

	case 'I':
	  {			/* Include file directory.  */
	    char *temp = xstrdup (optarg);

	    add_include_dir (temp);
	    break;
	  }

	case 'o':
	  out_file_name = xstrdup (optarg);
	  break;

	case 'w':
	  break;

	case 'X':
	  /* -X means treat warnings as errors.  */
	  break;

	case OPTION_REDUCE_MEMORY_OVERHEADS:
	  /* The only change we make at the moment is to reduce
	     the size of the hash tables that we use.  */
	  set_gas_hash_table_size (4051);
	  break;

	case OPTION_HASH_TABLE_SIZE:
	  {
	    unsigned long new_size;

            new_size = strtoul (optarg, NULL, 0);
            if (new_size)
              set_gas_hash_table_size (new_size);
            else
              as_fatal (_("--hash-size needs a numeric argument"));
	    break;
	  }
	}
    }

  free (shortopts);
  free (longopts);

  *pargc = new_argc;
  *pargv = new_argv;

#ifdef md_after_parse_args
  md_after_parse_args ();
#endif
}

static void
dump_statistics (void)
{
  long run_time = get_run_time () - start_time;

  fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"),
	   myname, run_time / 1000000, run_time % 1000000);

  subsegs_print_statistics (stderr);
  write_print_statistics (stderr);
  symbol_print_statistics (stderr);
  read_print_statistics (stderr);

#ifdef tc_print_statistics
  tc_print_statistics (stderr);
#endif

#ifdef obj_print_statistics
  obj_print_statistics (stderr);
#endif
}

static void
close_output_file (void)
{
  output_file_close (out_file_name);
  if (!keep_it)
    unlink_if_ordinary (out_file_name);
}

/* The interface between the macro code and gas expression handling.  */

static size_t
macro_expr (const char *emsg, size_t idx, sb *in, offsetT *val)
{
  char *hold;
  expressionS ex;

  sb_terminate (in);

  hold = input_line_pointer;
  input_line_pointer = in->ptr + idx;
  expression_and_evaluate (&ex);
  idx = input_line_pointer - in->ptr;
  input_line_pointer = hold;

  if (ex.X_op != O_constant)
    as_bad ("%s", emsg);

  *val = ex.X_add_number;

  return idx;
}

/* Here to attempt 1 pass over each input file.
   We scan argv[*] looking for filenames or exactly "" which is
   shorthand for stdin. Any argv that is NULL is not a file-name.
   We set need_pass_2 TRUE if, after this, we still have unresolved
   expressions of the form (unknown value)+-(unknown value).

   Note the un*x semantics: there is only 1 logical input file, but it
   may be a catenation of many 'physical' input files.  */

static void
perform_an_assembly_pass (int argc, char ** argv)
{
  int saw_a_file = 0;
#ifndef OBJ_MACH_O
  flagword applicable;
#endif

  need_pass_2 = 0;

#ifndef OBJ_MACH_O
  /* Create the standard sections, and those the assembler uses
     internally.  */
  text_section = subseg_new (TEXT_SECTION_NAME, 0);
  data_section = subseg_new (DATA_SECTION_NAME, 0);
  bss_section = subseg_new (BSS_SECTION_NAME, 0);
  /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
     to have relocs, otherwise we don't find out in time.  */
  applicable = bfd_applicable_section_flags (stdoutput);
  bfd_set_section_flags (stdoutput, text_section,
			 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
				       | SEC_CODE | SEC_READONLY));
  bfd_set_section_flags (stdoutput, data_section,
			 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
				       | SEC_DATA));
  bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC);
  seg_info (bss_section)->bss = 1;
#endif
  subseg_new (BFD_ABS_SECTION_NAME, 0);
  subseg_new (BFD_UND_SECTION_NAME, 0);
  reg_section = subseg_new ("*GAS `reg' section*", 0);
  expr_section = subseg_new ("*GAS `expr' section*", 0);

#ifndef OBJ_MACH_O
  subseg_set (text_section, 0);
#endif

  /* This may add symbol table entries, which requires having an open BFD,
     and sections already created.  */
  md_begin ();

#ifdef USING_CGEN
  gas_cgen_begin ();
#endif
#ifdef obj_begin
  obj_begin ();
#endif

  /* Skip argv[0].  */
  argv++;
  argc--;

  while (argc--)
    {
      if (*argv)
	{			/* Is it a file-name argument?  */
	  PROGRESS (1);
	  saw_a_file++;
	  /* argv->"" if stdin desired, else->filename.  */
	  read_a_source_file (*argv);
	}
      argv++;			/* Completed that argv.  */
    }
  if (!saw_a_file)
    read_a_source_file ("");
}


int
main (int argc, char ** argv)
{
  char ** argv_orig = argv;
  struct stat sob;

  int macro_strip_at;

  start_time = get_run_time ();
  signal_init ();

#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
  setlocale (LC_MESSAGES, "");
#endif
#if defined (HAVE_SETLOCALE)
  setlocale (LC_CTYPE, "");
#endif
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);

  if (debug_memory)
    chunksize = 64;

#ifdef HOST_SPECIAL_INIT
  HOST_SPECIAL_INIT (argc, argv);
#endif

  myname = argv[0];
  xmalloc_set_program_name (myname);

  expandargv (&argc, &argv);

  START_PROGRESS (myname, 0);

#ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
#define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
#endif

  out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;

  hex_init ();
  bfd_init ();
  bfd_set_error_program_name (myname);

#ifdef USE_EMULATIONS
  select_emulation_mode (argc, argv);
#endif

  PROGRESS (1);
  /* Call parse_args before any of the init/begin functions
     so that switches like --hash-size can be honored.  */
  parse_args (&argc, &argv);

  if (argc > 1 && stat (out_file_name, &sob) == 0)
    {
      int i;

      for (i = 1; i < argc; ++i)
	{
	  struct stat sib;

	  /* Check that the input file and output file are different.  */
	  if (stat (argv[i], &sib) == 0
	      && sib.st_ino == sob.st_ino
	      /* POSIX emulating systems may support stat() but if the
		 underlying file system does not support a file serial number
		 of some kind then they will return 0 for the inode.  So
		 two files with an inode of 0 may not actually be the same.
		 On real POSIX systems no ordinary file will ever have an
		 inode of 0.  */
	      && sib.st_ino != 0
	      /* Different files may have the same inode number if they
		 reside on different devices, so check the st_dev field as
		 well.  */
	      && sib.st_dev == sob.st_dev)
	    {
	      const char *saved_out_file_name = out_file_name;

	      /* Don't let as_fatal remove the output file!  */
	      out_file_name = NULL;
	      as_fatal (_("The input '%s' and output '%s' files are the same"),
			argv[i], saved_out_file_name);
	    }
	}
    }

  symbol_begin ();
  frag_init ();
  subsegs_begin ();
  read_begin ();
  input_scrub_begin ();
  expr_begin ();

  /* It has to be called after dump_statistics ().  */
  xatexit (close_output_file);

  if (flag_print_statistics)
    xatexit (dump_statistics);

  macro_strip_at = 0;
#ifdef TC_I960
  macro_strip_at = flag_mri;
#endif

  macro_init (flag_macro_alternate, flag_mri, macro_strip_at, macro_expr);

  PROGRESS (1);

  output_file_create (out_file_name);
  gas_assert (stdoutput != 0);

  dot_symbol_init ();

#ifdef tc_init_after_args
  tc_init_after_args ();
#endif

  itbl_init ();

  dwarf2_init ();

  local_symbol_make (".gasversion.", absolute_section,
		     BFD_VERSION / 10000UL, &predefined_address_frag);

  /* Now that we have fully initialized, and have created the output
     file, define any symbols requested by --defsym command line
     arguments.  */
  while (defsyms != NULL)
    {
      symbolS *sym;
      struct defsym_list *next;

      sym = symbol_new (defsyms->name, absolute_section, defsyms->value,
			&zero_address_frag);
      /* Make symbols defined on the command line volatile, so that they
	 can be redefined inside a source file.  This makes this assembler's
	 behaviour compatible with earlier versions, but it may not be
	 completely intuitive.  */
      S_SET_VOLATILE (sym);
      symbol_table_insert (sym);
      next = defsyms->next;
      free (defsyms);
      defsyms = next;
    }

  PROGRESS (1);

  /* Assemble it.  */
  perform_an_assembly_pass (argc, argv);

  cond_finish_check (-1);

#ifdef md_end
  md_end ();
#endif

#if defined OBJ_ELF || defined OBJ_MAYBE_ELF
  if ((flag_execstack || flag_noexecstack)
      && OUTPUT_FLAVOR == bfd_target_elf_flavour)
    {
      segT gnustack;

      gnustack = subseg_new (".note.GNU-stack", 0);
      bfd_set_section_flags (stdoutput, gnustack,
			     SEC_READONLY | (flag_execstack ? SEC_CODE : 0));

    }
#endif

  /* If we've been collecting dwarf2 .debug_line info, either for
     assembly debugging or on behalf of the compiler, emit it now.  */
  dwarf2_finish ();

  /* If we constructed dwarf2 .eh_frame info, either via .cfi
     directives from the user or by the backend, emit it now.  */
  cfi_finish ();

  keep_it = 0;
  if (seen_at_least_1_file ())
    {
      int n_warns, n_errs;
      char warn_msg[50];
      char err_msg[50];

      write_object_file ();

      n_warns = had_warnings ();
      n_errs = had_errors ();

      sprintf (warn_msg,
	       ngettext ("%d warning", "%d warnings", n_warns), n_warns);
      sprintf (err_msg,
	       ngettext ("%d error", "%d errors", n_errs), n_errs);
      if (flag_fatal_warnings && n_warns != 0)
	{
	  if (n_errs == 0)
	    as_bad (_("%s, treating warnings as errors"), warn_msg);
	  n_errs += n_warns;
	}

      if (n_errs == 0)
	keep_it = 1;
      else if (flag_always_generate_output)
	{
	  /* The -Z flag indicates that an object file should be generated,
	     regardless of warnings and errors.  */
	  keep_it = 1;
	  fprintf (stderr, _("%s, %s, generating bad object file\n"),
		   err_msg, warn_msg);
	}
    }

  fflush (stderr);

#ifndef NO_LISTING
  listing_print (listing_filename, argv_orig);
#endif

  input_scrub_end ();

  END_PROGRESS (myname);

  /* Use xexit instead of return, because under VMS environments they
     may not place the same interpretation on the value given.  */
  if (had_errors () != 0)
    xexit (EXIT_FAILURE);

  /* Only generate dependency file if assembler was successful.  */
  print_dependencies ();

  xexit (EXIT_SUCCESS);
}