1 /* as.c - GAS main program.
2 Copyright (C) 1987-2020 Free Software Foundation, Inc.
3
4 This file is part of GAS, the GNU Assembler.
5
6 GAS is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
9 any later version.
10
11 GAS is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
14 License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GAS; see the file COPYING. If not, write to the Free
18 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
19 02110-1301, USA. */
20
21 /* Main program for AS; a 32-bit assembler of GNU.
22 Understands command arguments.
23 Has a few routines that don't fit in other modules because they
24 are shared.
25
26 bugs
27
28 : initialisers
29 Since no-one else says they will support them in future: I
30 don't support them now. */
31
32 #define COMMON
33
34 /* Disable code to set FAKE_LABEL_NAME in obj-multi.h, to avoid circular
35 reference. */
36 #define INITIALIZING_EMULS
37
38 #include "as.h"
39 #include "subsegs.h"
40 #include "output-file.h"
41 #include "sb.h"
42 #include "macro.h"
43 #include "dwarf2dbg.h"
44 #include "dw2gencfi.h"
45 #include "bfdver.h"
46 #include "write.h"
47
48 #ifdef HAVE_ITBL_CPU
49 #include "itbl-ops.h"
50 #else
51 #define itbl_init()
52 #endif
53
54 #ifdef USING_CGEN
55 /* Perform any cgen specific initialisation for gas. */
56 extern void gas_cgen_begin (void);
57 #endif
58
59 /* We build a list of defsyms as we read the options, and then define
60 them after we have initialized everything. */
61 struct defsym_list
62 {
63 struct defsym_list *next;
64 char *name;
65 valueT value;
66 };
67
68
69 /* True if a listing is wanted. */
70 int listing;
71
72 /* Type of debugging to generate. */
73 enum debug_info_type debug_type = DEBUG_UNSPECIFIED;
74 int use_gnu_debug_info_extensions = 0;
75
76 #ifndef MD_DEBUG_FORMAT_SELECTOR
77 #define MD_DEBUG_FORMAT_SELECTOR NULL
78 #endif
79 static enum debug_info_type (*md_debug_format_selector) (int *) = MD_DEBUG_FORMAT_SELECTOR;
80
81 /* Maximum level of macro nesting. */
82 int max_macro_nest = 100;
83
84 /* argv[0] */
85 static char * myname;
86
87 /* The default obstack chunk size. If we set this to zero, the
88 obstack code will use whatever will fit in a 4096 byte block. */
89 int chunksize = 0;
90
91 /* To monitor memory allocation more effectively, make this non-zero.
92 Then the chunk sizes for gas and bfd will be reduced. */
93 int debug_memory = 0;
94
95 /* Enable verbose mode. */
96 int verbose = 0;
97
98 /* Which version of DWARF CIE to produce. This default value of -1
99 indicates that this value has not been set yet, a default value is
100 provided in dwarf2_init. A different value can also be supplied by the
101 command line flag --gdwarf-cie-version, or by a target in
102 MD_AFTER_PARSE_ARGS. */
103 int flag_dwarf_cie_version = -1;
104
105 /* The maximum level of DWARF DEBUG information we should manufacture.
106 This defaults to 3 unless overridden by a command line option. */
107 unsigned int dwarf_level = 3;
108
109 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
110 int flag_use_elf_stt_common = DEFAULT_GENERATE_ELF_STT_COMMON;
111 bfd_boolean flag_generate_build_notes = DEFAULT_GENERATE_BUILD_NOTES;
112 #endif
113
114 /* Keep the output file. */
115 static int keep_it = 0;
116
117 segT reg_section;
118 segT expr_section;
119 segT text_section;
120 segT data_section;
121 segT bss_section;
122
123 /* Name of listing file. */
124 static char *listing_filename = NULL;
125
126 static struct defsym_list *defsyms;
127
128 #ifdef HAVE_ITBL_CPU
129 /* Keep a record of the itbl files we read in. */
130 struct itbl_file_list
131 {
132 struct itbl_file_list *next;
133 char *name;
134 };
135 static struct itbl_file_list *itbl_files;
136 #endif
137
138 static long start_time;
139
140 static int flag_macro_alternate;
141
142
143 #ifdef USE_EMULATIONS
144 #define EMULATION_ENVIRON "AS_EMULATION"
145
146 extern struct emulation mipsbelf, mipslelf, mipself;
147 extern struct emulation i386coff, i386elf, i386aout;
148 extern struct emulation crisaout, criself;
149
150 static struct emulation *const emulations[] = { EMULATIONS };
151 static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]);
152
153 static void
select_emulation_mode(int argc,char ** argv)154 select_emulation_mode (int argc, char **argv)
155 {
156 int i;
157 char *p;
158 const char *em = NULL;
159
160 for (i = 1; i < argc; i++)
161 if (!strncmp ("--em", argv[i], 4))
162 break;
163
164 if (i == argc)
165 goto do_default;
166
167 p = strchr (argv[i], '=');
168 if (p)
169 p++;
170 else
171 p = argv[i + 1];
172
173 if (!p || !*p)
174 as_fatal (_("missing emulation mode name"));
175 em = p;
176
177 do_default:
178 if (em == 0)
179 em = getenv (EMULATION_ENVIRON);
180 if (em == 0)
181 em = DEFAULT_EMULATION;
182
183 if (em)
184 {
185 for (i = 0; i < n_emulations; i++)
186 if (!strcmp (emulations[i]->name, em))
187 break;
188 if (i == n_emulations)
189 as_fatal (_("unrecognized emulation name `%s'"), em);
190 this_emulation = emulations[i];
191 }
192 else
193 this_emulation = emulations[0];
194
195 this_emulation->init ();
196 }
197
198 const char *
default_emul_bfd_name(void)199 default_emul_bfd_name (void)
200 {
201 abort ();
202 return NULL;
203 }
204
205 void
common_emul_init(void)206 common_emul_init (void)
207 {
208 this_format = this_emulation->format;
209
210 if (this_emulation->leading_underscore == 2)
211 this_emulation->leading_underscore = this_format->dfl_leading_underscore;
212
213 if (this_emulation->default_endian != 2)
214 target_big_endian = this_emulation->default_endian;
215
216 if (this_emulation->fake_label_name == 0)
217 {
218 if (this_emulation->leading_underscore)
219 this_emulation->fake_label_name = FAKE_LABEL_NAME;
220 else
221 /* What other parameters should we test? */
222 this_emulation->fake_label_name = "." FAKE_LABEL_NAME;
223 }
224 }
225 #endif
226
227 void
print_version_id(void)228 print_version_id (void)
229 {
230 static int printed;
231
232 if (printed)
233 return;
234 printed = 1;
235
236 fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s\n"),
237 VERSION, TARGET_ALIAS, BFD_VERSION_STRING);
238 }
239
240 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
241 enum compressed_debug_section_type flag_compress_debug
242 = COMPRESS_DEBUG_GABI_ZLIB;
243 #endif
244
245 static void
show_usage(FILE * stream)246 show_usage (FILE * stream)
247 {
248 fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname);
249
250 fprintf (stream, _("\
251 Options:\n\
252 -a[sub-option...] turn on listings\n\
253 Sub-options [default hls]:\n\
254 c omit false conditionals\n\
255 d omit debugging directives\n\
256 g include general info\n\
257 h include high-level source\n\
258 l include assembly\n\
259 m include macro expansions\n\
260 n omit forms processing\n\
261 s include symbols\n\
262 =FILE list to FILE (must be last sub-option)\n"));
263
264 fprintf (stream, _("\
265 --alternate initially turn on alternate macro syntax\n"));
266 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
267 fprintf (stream, _("\
268 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
269 compress DWARF debug sections using zlib [default]\n"));
270 fprintf (stream, _("\
271 --nocompress-debug-sections\n\
272 don't compress DWARF debug sections\n"));
273 #else
274 fprintf (stream, _("\
275 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
276 compress DWARF debug sections using zlib\n"));
277 fprintf (stream, _("\
278 --nocompress-debug-sections\n\
279 don't compress DWARF debug sections [default]\n"));
280 #endif
281 fprintf (stream, _("\
282 -D produce assembler debugging messages\n"));
283 fprintf (stream, _("\
284 --debug-prefix-map OLD=NEW\n\
285 map OLD to NEW in debug information\n"));
286 fprintf (stream, _("\
287 --defsym SYM=VAL define symbol SYM to given value\n"));
288 #ifdef USE_EMULATIONS
289 {
290 int i;
291 const char *def_em;
292
293 fprintf (stream, "\
294 --em=[");
295 for (i = 0; i < n_emulations - 1; i++)
296 fprintf (stream, "%s | ", emulations[i]->name);
297 fprintf (stream, "%s]\n", emulations[i]->name);
298
299 def_em = getenv (EMULATION_ENVIRON);
300 if (!def_em)
301 def_em = DEFAULT_EMULATION;
302 fprintf (stream, _("\
303 emulate output (default %s)\n"), def_em);
304 }
305 #endif
306 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
307 fprintf (stream, _("\
308 --execstack require executable stack for this object\n"));
309 fprintf (stream, _("\
310 --noexecstack don't require executable stack for this object\n"));
311 fprintf (stream, _("\
312 --size-check=[error|warning]\n\
313 ELF .size directive check (default --size-check=error)\n"));
314 fprintf (stream, _("\
315 --elf-stt-common=[no|yes] "));
316 if (DEFAULT_GENERATE_ELF_STT_COMMON)
317 fprintf (stream, _("(default: yes)\n"));
318 else
319 fprintf (stream, _("(default: no)\n"));
320 fprintf (stream, _("\
321 generate ELF common symbols with STT_COMMON type\n"));
322 fprintf (stream, _("\
323 --sectname-subst enable section name substitution sequences\n"));
324
325 fprintf (stream, _("\
326 --generate-missing-build-notes=[no|yes] "));
327 #if DEFAULT_GENERATE_BUILD_NOTES
328 fprintf (stream, _("(default: yes)\n"));
329 #else
330 fprintf (stream, _("(default: no)\n"));
331 #endif
332 fprintf (stream, _("\
333 generate GNU Build notes if none are present in the input\n"));
334 #endif /* OBJ_ELF */
335
336 fprintf (stream, _("\
337 -f skip whitespace and comment preprocessing\n"));
338 fprintf (stream, _("\
339 -g --gen-debug generate debugging information\n"));
340 fprintf (stream, _("\
341 --gstabs generate STABS debugging information\n"));
342 fprintf (stream, _("\
343 --gstabs+ generate STABS debug info with GNU extensions\n"));
344 fprintf (stream, _("\
345 --gdwarf-<N> generate DWARF<N> debugging information. 2 <= <N> <= 5\n"));
346 fprintf (stream, _("\
347 --gdwarf-sections generate per-function section names for DWARF line information\n"));
348 fprintf (stream, _("\
349 --target-help show target specific options\n"));
350 fprintf (stream, _("\
351 -I DIR add DIR to search list for .include directives\n"));
352 fprintf (stream, _("\
353 -J don't warn about signed overflow\n"));
354 fprintf (stream, _("\
355 -K warn when differences altered for long displacements\n"));
356 fprintf (stream, _("\
357 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
358 fprintf (stream, _("\
359 -M,--mri assemble in MRI compatibility mode\n"));
360 fprintf (stream, _("\
361 --MD FILE write dependency information in FILE (default none)\n"));
362 fprintf (stream, _("\
363 -nocpp ignored\n"));
364 fprintf (stream, _("\
365 -no-pad-sections do not pad the end of sections to alignment boundaries\n"));
366 fprintf (stream, _("\
367 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
368 fprintf (stream, _("\
369 -R fold data section into text section\n"));
370 fprintf (stream, _("\
371 --statistics print various measured statistics from execution\n"));
372 fprintf (stream, _("\
373 --strip-local-absolute strip local absolute symbols\n"));
374 fprintf (stream, _("\
375 --traditional-format Use same format as native assembler when possible\n"));
376 fprintf (stream, _("\
377 --version print assembler version number and exit\n"));
378 fprintf (stream, _("\
379 -W --no-warn suppress warnings\n"));
380 fprintf (stream, _("\
381 --warn don't suppress warnings\n"));
382 fprintf (stream, _("\
383 --fatal-warnings treat warnings as errors\n"));
384 #ifdef HAVE_ITBL_CPU
385 fprintf (stream, _("\
386 --itbl INSTTBL extend instruction set to include instructions\n\
387 matching the specifications defined in file INSTTBL\n"));
388 #endif
389 fprintf (stream, _("\
390 -w ignored\n"));
391 fprintf (stream, _("\
392 -X ignored\n"));
393 fprintf (stream, _("\
394 -Z generate object file even after errors\n"));
395 fprintf (stream, _("\
396 --listing-lhs-width set the width in words of the output data column of\n\
397 the listing\n"));
398 fprintf (stream, _("\
399 --listing-lhs-width2 set the width in words of the continuation lines\n\
400 of the output data column; ignored if smaller than\n\
401 the width of the first line\n"));
402 fprintf (stream, _("\
403 --listing-rhs-width set the max width in characters of the lines from\n\
404 the source file\n"));
405 fprintf (stream, _("\
406 --listing-cont-lines set the maximum number of continuation lines used\n\
407 for the output data column of the listing\n"));
408 fprintf (stream, _("\
409 @FILE read options from FILE\n"));
410
411 md_show_usage (stream);
412
413 fputc ('\n', stream);
414
415 if (REPORT_BUGS_TO[0] && stream == stdout)
416 fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
417 }
418
419 /* Since it is easy to do here we interpret the special arg "-"
420 to mean "use stdin" and we set that argv[] pointing to "".
421 After we have munged argv[], the only things left are source file
422 name(s) and ""(s) denoting stdin. These file names are used
423 (perhaps more than once) later.
424
425 check for new machine-dep cmdline options in
426 md_parse_option definitions in config/tc-*.c. */
427
428 static void
parse_args(int * pargc,char *** pargv)429 parse_args (int * pargc, char *** pargv)
430 {
431 int old_argc;
432 int new_argc;
433 char ** old_argv;
434 char ** new_argv;
435 /* Starting the short option string with '-' is for programs that
436 expect options and other ARGV-elements in any order and that care about
437 the ordering of the two. We describe each non-option ARGV-element
438 as if it were the argument of an option with character code 1. */
439 char *shortopts;
440 extern const char *md_shortopts;
441 static const char std_shortopts[] =
442 {
443 '-', 'J',
444 #ifndef WORKING_DOT_WORD
445 /* -K is not meaningful if .word is not being hacked. */
446 'K',
447 #endif
448 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
449 #ifndef VMS
450 /* -v takes an argument on VMS, so we don't make it a generic
451 option. */
452 'v',
453 #endif
454 'w', 'X',
455 #ifdef HAVE_ITBL_CPU
456 /* New option for extending instruction set (see also --itbl below). */
457 't', ':',
458 #endif
459 '\0'
460 };
461 struct option *longopts;
462 extern struct option md_longopts[];
463 extern size_t md_longopts_size;
464 /* Codes used for the long options with no short synonyms. */
465 enum option_values
466 {
467 OPTION_HELP = OPTION_STD_BASE,
468 OPTION_NOCPP,
469 OPTION_STATISTICS,
470 OPTION_VERSION,
471 OPTION_DUMPCONFIG,
472 OPTION_VERBOSE,
473 OPTION_EMULATION,
474 OPTION_DEBUG_PREFIX_MAP,
475 OPTION_DEFSYM,
476 OPTION_LISTING_LHS_WIDTH,
477 OPTION_LISTING_LHS_WIDTH2,
478 OPTION_LISTING_RHS_WIDTH,
479 OPTION_LISTING_CONT_LINES,
480 OPTION_DEPFILE,
481 OPTION_GSTABS,
482 OPTION_GSTABS_PLUS,
483 OPTION_GDWARF_2,
484 OPTION_GDWARF_3,
485 OPTION_GDWARF_4,
486 OPTION_GDWARF_5,
487 OPTION_GDWARF_SECTIONS,
488 OPTION_GDWARF_CIE_VERSION,
489 OPTION_STRIP_LOCAL_ABSOLUTE,
490 OPTION_TRADITIONAL_FORMAT,
491 OPTION_WARN,
492 OPTION_TARGET_HELP,
493 OPTION_EXECSTACK,
494 OPTION_NOEXECSTACK,
495 OPTION_SIZE_CHECK,
496 OPTION_ELF_STT_COMMON,
497 OPTION_ELF_BUILD_NOTES,
498 OPTION_SECTNAME_SUBST,
499 OPTION_ALTERNATE,
500 OPTION_AL,
501 OPTION_HASH_TABLE_SIZE,
502 OPTION_REDUCE_MEMORY_OVERHEADS,
503 OPTION_WARN_FATAL,
504 OPTION_COMPRESS_DEBUG,
505 OPTION_NOCOMPRESS_DEBUG,
506 OPTION_NO_PAD_SECTIONS /* = STD_BASE + 40 */
507 /* When you add options here, check that they do
508 not collide with OPTION_MD_BASE. See as.h. */
509 };
510
511 static const struct option std_longopts[] =
512 {
513 /* Note: commas are placed at the start of the line rather than
514 the end of the preceding line so that it is simpler to
515 selectively add and remove lines from this list. */
516 {"alternate", no_argument, NULL, OPTION_ALTERNATE}
517 /* The entry for "a" is here to prevent getopt_long_only() from
518 considering that -a is an abbreviation for --alternate. This is
519 necessary because -a=<FILE> is a valid switch but getopt would
520 normally reject it since --alternate does not take an argument. */
521 ,{"a", optional_argument, NULL, 'a'}
522 /* Handle -al=<FILE>. */
523 ,{"al", optional_argument, NULL, OPTION_AL}
524 ,{"compress-debug-sections", optional_argument, NULL, OPTION_COMPRESS_DEBUG}
525 ,{"nocompress-debug-sections", no_argument, NULL, OPTION_NOCOMPRESS_DEBUG}
526 ,{"debug-prefix-map", required_argument, NULL, OPTION_DEBUG_PREFIX_MAP}
527 ,{"defsym", required_argument, NULL, OPTION_DEFSYM}
528 ,{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG}
529 ,{"emulation", required_argument, NULL, OPTION_EMULATION}
530 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
531 ,{"execstack", no_argument, NULL, OPTION_EXECSTACK}
532 ,{"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK}
533 ,{"size-check", required_argument, NULL, OPTION_SIZE_CHECK}
534 ,{"elf-stt-common", required_argument, NULL, OPTION_ELF_STT_COMMON}
535 ,{"sectname-subst", no_argument, NULL, OPTION_SECTNAME_SUBST}
536 ,{"generate-missing-build-notes", required_argument, NULL, OPTION_ELF_BUILD_NOTES}
537 #endif
538 ,{"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL}
539 ,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF_2}
540 ,{"gdwarf-3", no_argument, NULL, OPTION_GDWARF_3}
541 ,{"gdwarf-4", no_argument, NULL, OPTION_GDWARF_4}
542 ,{"gdwarf-5", no_argument, NULL, OPTION_GDWARF_5}
543 /* GCC uses --gdwarf-2 but GAS used to to use --gdwarf2,
544 so we keep it here for backwards compatibility. */
545 ,{"gdwarf2", no_argument, NULL, OPTION_GDWARF_2}
546 ,{"gdwarf-sections", no_argument, NULL, OPTION_GDWARF_SECTIONS}
547 ,{"gdwarf-cie-version", required_argument, NULL, OPTION_GDWARF_CIE_VERSION}
548 ,{"gen-debug", no_argument, NULL, 'g'}
549 ,{"gstabs", no_argument, NULL, OPTION_GSTABS}
550 ,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS}
551 ,{"hash-size", required_argument, NULL, OPTION_HASH_TABLE_SIZE}
552 ,{"help", no_argument, NULL, OPTION_HELP}
553 #ifdef HAVE_ITBL_CPU
554 /* New option for extending instruction set (see also -t above).
555 The "-t file" or "--itbl file" option extends the basic set of
556 valid instructions by reading "file", a text file containing a
557 list of instruction formats. The additional opcodes and their
558 formats are added to the built-in set of instructions, and
559 mnemonics for new registers may also be defined. */
560 ,{"itbl", required_argument, NULL, 't'}
561 #endif
562 /* getopt allows abbreviations, so we do this to stop it from
563 treating -k as an abbreviation for --keep-locals. Some
564 ports use -k to enable PIC assembly. */
565 ,{"keep-locals", no_argument, NULL, 'L'}
566 ,{"keep-locals", no_argument, NULL, 'L'}
567 ,{"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH}
568 ,{"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2}
569 ,{"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH}
570 ,{"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES}
571 ,{"MD", required_argument, NULL, OPTION_DEPFILE}
572 ,{"mri", no_argument, NULL, 'M'}
573 ,{"nocpp", no_argument, NULL, OPTION_NOCPP}
574 ,{"no-pad-sections", no_argument, NULL, OPTION_NO_PAD_SECTIONS}
575 ,{"no-warn", no_argument, NULL, 'W'}
576 ,{"reduce-memory-overheads", no_argument, NULL, OPTION_REDUCE_MEMORY_OVERHEADS}
577 ,{"statistics", no_argument, NULL, OPTION_STATISTICS}
578 ,{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE}
579 ,{"version", no_argument, NULL, OPTION_VERSION}
580 ,{"verbose", no_argument, NULL, OPTION_VERBOSE}
581 ,{"target-help", no_argument, NULL, OPTION_TARGET_HELP}
582 ,{"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT}
583 ,{"warn", no_argument, NULL, OPTION_WARN}
584 };
585
586 /* Construct the option lists from the standard list and the target
587 dependent list. Include space for an extra NULL option and
588 always NULL terminate. */
589 shortopts = concat (std_shortopts, md_shortopts, (char *) NULL);
590 longopts = (struct option *) xmalloc (sizeof (std_longopts)
591 + md_longopts_size + sizeof (struct option));
592 memcpy (longopts, std_longopts, sizeof (std_longopts));
593 memcpy (((char *) longopts) + sizeof (std_longopts), md_longopts, md_longopts_size);
594 memset (((char *) longopts) + sizeof (std_longopts) + md_longopts_size,
595 0, sizeof (struct option));
596
597 /* Make a local copy of the old argv. */
598 old_argc = *pargc;
599 old_argv = *pargv;
600
601 /* Initialize a new argv that contains no options. */
602 new_argv = XNEWVEC (char *, old_argc + 1);
603 new_argv[0] = old_argv[0];
604 new_argc = 1;
605 new_argv[new_argc] = NULL;
606
607 while (1)
608 {
609 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
610 indicate a long option. */
611 int longind;
612 int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts,
613 &longind);
614
615 if (optc == -1)
616 break;
617
618 switch (optc)
619 {
620 default:
621 /* md_parse_option should return 1 if it recognizes optc,
622 0 if not. */
623 if (md_parse_option (optc, optarg) != 0)
624 break;
625 /* `-v' isn't included in the general short_opts list, so check for
626 it explicitly here before deciding we've gotten a bad argument. */
627 if (optc == 'v')
628 {
629 #ifdef VMS
630 /* Telling getopt to treat -v's value as optional can result
631 in it picking up a following filename argument here. The
632 VMS code in md_parse_option can return 0 in that case,
633 but it has no way of pushing the filename argument back. */
634 if (optarg && *optarg)
635 new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL;
636 else
637 #else
638 case 'v':
639 #endif
640 case OPTION_VERBOSE:
641 print_version_id ();
642 verbose = 1;
643 break;
644 }
645 else
646 as_bad (_("unrecognized option -%c%s"), optc, optarg ? optarg : "");
647 /* Fall through. */
648
649 case '?':
650 exit (EXIT_FAILURE);
651
652 case 1: /* File name. */
653 if (!strcmp (optarg, "-"))
654 optarg = (char *) "";
655 new_argv[new_argc++] = optarg;
656 new_argv[new_argc] = NULL;
657 break;
658
659 case OPTION_TARGET_HELP:
660 md_show_usage (stdout);
661 exit (EXIT_SUCCESS);
662
663 case OPTION_HELP:
664 show_usage (stdout);
665 exit (EXIT_SUCCESS);
666
667 case OPTION_NOCPP:
668 break;
669
670 case OPTION_NO_PAD_SECTIONS:
671 do_not_pad_sections_to_alignment = 1;
672 break;
673
674 case OPTION_STATISTICS:
675 flag_print_statistics = 1;
676 break;
677
678 case OPTION_STRIP_LOCAL_ABSOLUTE:
679 flag_strip_local_absolute = 1;
680 break;
681
682 case OPTION_TRADITIONAL_FORMAT:
683 flag_traditional_format = 1;
684 break;
685
686 case OPTION_VERSION:
687 /* This output is intended to follow the GNU standards document. */
688 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING);
689 printf (_("Copyright (C) 2020 Free Software Foundation, Inc.\n"));
690 printf (_("\
691 This program is free software; you may redistribute it under the terms of\n\
692 the GNU General Public License version 3 or later.\n\
693 This program has absolutely no warranty.\n"));
694 #ifdef TARGET_WITH_CPU
695 printf (_("This assembler was configured for a target of `%s' "
696 "and default,\ncpu type `%s'.\n"),
697 TARGET_ALIAS, TARGET_WITH_CPU);
698 #else
699 printf (_("This assembler was configured for a target of `%s'.\n"),
700 TARGET_ALIAS);
701 #endif
702 exit (EXIT_SUCCESS);
703
704 case OPTION_EMULATION:
705 #ifdef USE_EMULATIONS
706 if (strcmp (optarg, this_emulation->name))
707 as_fatal (_("multiple emulation names specified"));
708 #else
709 as_fatal (_("emulations not handled in this configuration"));
710 #endif
711 break;
712
713 case OPTION_DUMPCONFIG:
714 fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS);
715 fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL);
716 fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU);
717 #ifdef TARGET_OBJ_FORMAT
718 fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT);
719 #endif
720 #ifdef TARGET_FORMAT
721 fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT);
722 #endif
723 exit (EXIT_SUCCESS);
724
725 case OPTION_COMPRESS_DEBUG:
726 if (optarg)
727 {
728 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
729 if (strcasecmp (optarg, "none") == 0)
730 flag_compress_debug = COMPRESS_DEBUG_NONE;
731 else if (strcasecmp (optarg, "zlib") == 0)
732 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
733 else if (strcasecmp (optarg, "zlib-gnu") == 0)
734 flag_compress_debug = COMPRESS_DEBUG_GNU_ZLIB;
735 else if (strcasecmp (optarg, "zlib-gabi") == 0)
736 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
737 else
738 as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
739 optarg);
740 #else
741 as_fatal (_("--compress-debug-sections=%s is unsupported"),
742 optarg);
743 #endif
744 }
745 else
746 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
747 break;
748
749 case OPTION_NOCOMPRESS_DEBUG:
750 flag_compress_debug = COMPRESS_DEBUG_NONE;
751 break;
752
753 case OPTION_DEBUG_PREFIX_MAP:
754 add_debug_prefix_map (optarg);
755 break;
756
757 case OPTION_DEFSYM:
758 {
759 char *s;
760 valueT i;
761 struct defsym_list *n;
762
763 for (s = optarg; *s != '\0' && *s != '='; s++)
764 ;
765 if (*s == '\0')
766 as_fatal (_("bad defsym; format is --defsym name=value"));
767 *s++ = '\0';
768 i = bfd_scan_vma (s, (const char **) NULL, 0);
769 n = XNEW (struct defsym_list);
770 n->next = defsyms;
771 n->name = optarg;
772 n->value = i;
773 defsyms = n;
774 }
775 break;
776
777 #ifdef HAVE_ITBL_CPU
778 case 't':
779 {
780 /* optarg is the name of the file containing the instruction
781 formats, opcodes, register names, etc. */
782 struct itbl_file_list *n;
783
784 if (optarg == NULL)
785 {
786 as_warn (_("no file name following -t option"));
787 break;
788 }
789
790 n = XNEW (struct itbl_file_list);
791 n->next = itbl_files;
792 n->name = optarg;
793 itbl_files = n;
794
795 /* Parse the file and add the new instructions to our internal
796 table. If multiple instruction tables are specified, the
797 information from this table gets appended onto the existing
798 internal table. */
799 itbl_files->name = xstrdup (optarg);
800 if (itbl_parse (itbl_files->name) != 0)
801 as_fatal (_("failed to read instruction table %s\n"),
802 itbl_files->name);
803 }
804 break;
805 #endif
806
807 case OPTION_DEPFILE:
808 start_dependencies (optarg);
809 break;
810
811 case 'g':
812 /* Some backends, eg Alpha and Mips, use the -g switch for their
813 own purposes. So we check here for an explicit -g and allow
814 the backend to decide if it wants to process it. */
815 if ( old_argv[optind - 1][1] == 'g'
816 && md_parse_option (optc, optarg))
817 continue;
818
819 /* We end up here for any -gsomething-not-already-a-long-option.
820 give some useful feedback on not (yet) supported -gdwarfxxx
821 versions/sections/options. */
822 if (strncmp (old_argv[optind - 1], "-gdwarf",
823 strlen ("-gdwarf")) == 0)
824 as_fatal (_("unknown DWARF option %s\n"), old_argv[optind - 1]);
825
826 if (md_debug_format_selector)
827 debug_type = md_debug_format_selector (& use_gnu_debug_info_extensions);
828 else if (IS_ELF)
829 {
830 debug_type = DEBUG_DWARF2;
831 dwarf_level = 2;
832 }
833 else
834 debug_type = DEBUG_STABS;
835 break;
836
837 case OPTION_GSTABS_PLUS:
838 use_gnu_debug_info_extensions = 1;
839 /* Fall through. */
840 case OPTION_GSTABS:
841 debug_type = DEBUG_STABS;
842 break;
843
844 case OPTION_GDWARF_2:
845 debug_type = DEBUG_DWARF2;
846 dwarf_level = 2;
847 break;
848
849 case OPTION_GDWARF_3:
850 debug_type = DEBUG_DWARF2;
851 dwarf_level = 3;
852 break;
853
854 case OPTION_GDWARF_4:
855 debug_type = DEBUG_DWARF2;
856 dwarf_level = 4;
857 break;
858
859 case OPTION_GDWARF_5:
860 debug_type = DEBUG_DWARF2;
861 dwarf_level = 5;
862 break;
863
864 case OPTION_GDWARF_SECTIONS:
865 flag_dwarf_sections = TRUE;
866 break;
867
868 case OPTION_GDWARF_CIE_VERSION:
869 flag_dwarf_cie_version = atoi (optarg);
870 /* The available CIE versions are 1 (DWARF 2), 3 (DWARF 3), and 4
871 (DWARF 4 and 5). */
872 if (flag_dwarf_cie_version < 1
873 || flag_dwarf_cie_version == 2
874 || flag_dwarf_cie_version > 4)
875 as_fatal (_("Invalid --gdwarf-cie-version `%s'"), optarg);
876 switch (flag_dwarf_cie_version)
877 {
878 case 1:
879 if (dwarf_level < 2)
880 dwarf_level = 2;
881 break;
882 case 3:
883 if (dwarf_level < 3)
884 dwarf_level = 3;
885 break;
886 default:
887 if (dwarf_level < 4)
888 dwarf_level = 4;
889 break;
890 }
891 break;
892
893 case 'J':
894 flag_signed_overflow_ok = 1;
895 break;
896
897 #ifndef WORKING_DOT_WORD
898 case 'K':
899 flag_warn_displacement = 1;
900 break;
901 #endif
902 case 'L':
903 flag_keep_locals = 1;
904 break;
905
906 case OPTION_LISTING_LHS_WIDTH:
907 listing_lhs_width = atoi (optarg);
908 if (listing_lhs_width_second < listing_lhs_width)
909 listing_lhs_width_second = listing_lhs_width;
910 break;
911 case OPTION_LISTING_LHS_WIDTH2:
912 {
913 int tmp = atoi (optarg);
914
915 if (tmp > listing_lhs_width)
916 listing_lhs_width_second = tmp;
917 }
918 break;
919 case OPTION_LISTING_RHS_WIDTH:
920 listing_rhs_width = atoi (optarg);
921 break;
922 case OPTION_LISTING_CONT_LINES:
923 listing_lhs_cont_lines = atoi (optarg);
924 break;
925
926 case 'M':
927 flag_mri = 1;
928 #ifdef TC_M68K
929 flag_m68k_mri = 1;
930 #endif
931 break;
932
933 case 'R':
934 flag_readonly_data_in_text = 1;
935 break;
936
937 case 'W':
938 flag_no_warnings = 1;
939 break;
940
941 case OPTION_WARN:
942 flag_no_warnings = 0;
943 flag_fatal_warnings = 0;
944 break;
945
946 case OPTION_WARN_FATAL:
947 flag_no_warnings = 0;
948 flag_fatal_warnings = 1;
949 break;
950
951 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
952 case OPTION_EXECSTACK:
953 flag_execstack = 1;
954 flag_noexecstack = 0;
955 break;
956
957 case OPTION_NOEXECSTACK:
958 flag_noexecstack = 1;
959 flag_execstack = 0;
960 break;
961
962 case OPTION_SIZE_CHECK:
963 if (strcasecmp (optarg, "error") == 0)
964 flag_allow_nonconst_size = FALSE;
965 else if (strcasecmp (optarg, "warning") == 0)
966 flag_allow_nonconst_size = TRUE;
967 else
968 as_fatal (_("Invalid --size-check= option: `%s'"), optarg);
969 break;
970
971 case OPTION_ELF_STT_COMMON:
972 if (strcasecmp (optarg, "no") == 0)
973 flag_use_elf_stt_common = 0;
974 else if (strcasecmp (optarg, "yes") == 0)
975 flag_use_elf_stt_common = 1;
976 else
977 as_fatal (_("Invalid --elf-stt-common= option: `%s'"),
978 optarg);
979 break;
980
981 case OPTION_SECTNAME_SUBST:
982 flag_sectname_subst = 1;
983 break;
984
985 case OPTION_ELF_BUILD_NOTES:
986 if (strcasecmp (optarg, "no") == 0)
987 flag_generate_build_notes = FALSE;
988 else if (strcasecmp (optarg, "yes") == 0)
989 flag_generate_build_notes = TRUE;
990 else
991 as_fatal (_("Invalid --generate-missing-build-notes option: `%s'"),
992 optarg);
993 break;
994
995 #endif /* OBJ_ELF */
996
997 case 'Z':
998 flag_always_generate_output = 1;
999 break;
1000
1001 case OPTION_AL:
1002 listing |= LISTING_LISTING;
1003 if (optarg)
1004 listing_filename = xstrdup (optarg);
1005 break;
1006
1007 case OPTION_ALTERNATE:
1008 optarg = old_argv [optind - 1];
1009 while (* optarg == '-')
1010 optarg ++;
1011
1012 if (strcmp (optarg, "alternate") == 0)
1013 {
1014 flag_macro_alternate = 1;
1015 break;
1016 }
1017 optarg ++;
1018 /* Fall through. */
1019
1020 case 'a':
1021 if (optarg)
1022 {
1023 if (optarg != old_argv[optind] && optarg[-1] == '=')
1024 --optarg;
1025
1026 if (md_parse_option (optc, optarg) != 0)
1027 break;
1028
1029 while (*optarg)
1030 {
1031 switch (*optarg)
1032 {
1033 case 'c':
1034 listing |= LISTING_NOCOND;
1035 break;
1036 case 'd':
1037 listing |= LISTING_NODEBUG;
1038 break;
1039 case 'g':
1040 listing |= LISTING_GENERAL;
1041 break;
1042 case 'h':
1043 listing |= LISTING_HLL;
1044 break;
1045 case 'l':
1046 listing |= LISTING_LISTING;
1047 break;
1048 case 'm':
1049 listing |= LISTING_MACEXP;
1050 break;
1051 case 'n':
1052 listing |= LISTING_NOFORM;
1053 break;
1054 case 's':
1055 listing |= LISTING_SYMBOLS;
1056 break;
1057 case '=':
1058 listing_filename = xstrdup (optarg + 1);
1059 optarg += strlen (listing_filename);
1060 break;
1061 default:
1062 as_fatal (_("invalid listing option `%c'"), *optarg);
1063 break;
1064 }
1065 optarg++;
1066 }
1067 }
1068 if (!listing)
1069 listing = LISTING_DEFAULT;
1070 break;
1071
1072 case 'D':
1073 /* DEBUG is implemented: it debugs different
1074 things from other people's assemblers. */
1075 flag_debug = 1;
1076 break;
1077
1078 case 'f':
1079 flag_no_comments = 1;
1080 break;
1081
1082 case 'I':
1083 { /* Include file directory. */
1084 char *temp = xstrdup (optarg);
1085
1086 add_include_dir (temp);
1087 break;
1088 }
1089
1090 case 'o':
1091 out_file_name = xstrdup (optarg);
1092 break;
1093
1094 case 'w':
1095 break;
1096
1097 case 'X':
1098 /* -X means treat warnings as errors. */
1099 break;
1100
1101 case OPTION_REDUCE_MEMORY_OVERHEADS:
1102 break;
1103
1104 case OPTION_HASH_TABLE_SIZE:
1105 break;
1106 }
1107 }
1108
1109 free (shortopts);
1110 free (longopts);
1111
1112 *pargc = new_argc;
1113 *pargv = new_argv;
1114
1115 #ifdef md_after_parse_args
1116 md_after_parse_args ();
1117 #endif
1118 }
1119
1120 static void
dump_statistics(void)1121 dump_statistics (void)
1122 {
1123 long run_time = get_run_time () - start_time;
1124
1125 fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"),
1126 myname, run_time / 1000000, run_time % 1000000);
1127
1128 subsegs_print_statistics (stderr);
1129 write_print_statistics (stderr);
1130 symbol_print_statistics (stderr);
1131 read_print_statistics (stderr);
1132
1133 #ifdef tc_print_statistics
1134 tc_print_statistics (stderr);
1135 #endif
1136
1137 #ifdef obj_print_statistics
1138 obj_print_statistics (stderr);
1139 #endif
1140 }
1141
1142 static void
close_output_file(void)1143 close_output_file (void)
1144 {
1145 output_file_close (out_file_name);
1146 if (!keep_it)
1147 unlink_if_ordinary (out_file_name);
1148 }
1149
1150 /* The interface between the macro code and gas expression handling. */
1151
1152 static size_t
macro_expr(const char * emsg,size_t idx,sb * in,offsetT * val)1153 macro_expr (const char *emsg, size_t idx, sb *in, offsetT *val)
1154 {
1155 expressionS ex;
1156
1157 sb_terminate (in);
1158
1159 temp_ilp (in->ptr + idx);
1160 expression_and_evaluate (&ex);
1161 idx = input_line_pointer - in->ptr;
1162 restore_ilp ();
1163
1164 if (ex.X_op != O_constant)
1165 as_bad ("%s", emsg);
1166
1167 *val = ex.X_add_number;
1168
1169 return idx;
1170 }
1171
1172 /* Here to attempt 1 pass over each input file.
1173 We scan argv[*] looking for filenames or exactly "" which is
1174 shorthand for stdin. Any argv that is NULL is not a file-name.
1175 We set need_pass_2 TRUE if, after this, we still have unresolved
1176 expressions of the form (unknown value)+-(unknown value).
1177
1178 Note the un*x semantics: there is only 1 logical input file, but it
1179 may be a catenation of many 'physical' input files. */
1180
1181 static void
perform_an_assembly_pass(int argc,char ** argv)1182 perform_an_assembly_pass (int argc, char ** argv)
1183 {
1184 int saw_a_file = 0;
1185 #ifndef OBJ_MACH_O
1186 flagword applicable;
1187 #endif
1188
1189 need_pass_2 = 0;
1190
1191 #ifndef OBJ_MACH_O
1192 /* Create the standard sections, and those the assembler uses
1193 internally. */
1194 text_section = subseg_new (TEXT_SECTION_NAME, 0);
1195 data_section = subseg_new (DATA_SECTION_NAME, 0);
1196 bss_section = subseg_new (BSS_SECTION_NAME, 0);
1197 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1198 to have relocs, otherwise we don't find out in time. */
1199 applicable = bfd_applicable_section_flags (stdoutput);
1200 bfd_set_section_flags (text_section,
1201 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1202 | SEC_CODE | SEC_READONLY));
1203 bfd_set_section_flags (data_section,
1204 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1205 | SEC_DATA));
1206 bfd_set_section_flags (bss_section, applicable & SEC_ALLOC);
1207 seg_info (bss_section)->bss = 1;
1208 #endif
1209 subseg_new (BFD_ABS_SECTION_NAME, 0);
1210 subseg_new (BFD_UND_SECTION_NAME, 0);
1211 reg_section = subseg_new ("*GAS `reg' section*", 0);
1212 expr_section = subseg_new ("*GAS `expr' section*", 0);
1213
1214 #ifndef OBJ_MACH_O
1215 subseg_set (text_section, 0);
1216 #endif
1217
1218 /* This may add symbol table entries, which requires having an open BFD,
1219 and sections already created. */
1220 md_begin ();
1221
1222 #ifdef USING_CGEN
1223 gas_cgen_begin ();
1224 #endif
1225 #ifdef obj_begin
1226 obj_begin ();
1227 #endif
1228
1229 /* Skip argv[0]. */
1230 argv++;
1231 argc--;
1232
1233 while (argc--)
1234 {
1235 if (*argv)
1236 { /* Is it a file-name argument? */
1237 PROGRESS (1);
1238 saw_a_file++;
1239 /* argv->"" if stdin desired, else->filename. */
1240 read_a_source_file (*argv);
1241 }
1242 argv++; /* Completed that argv. */
1243 }
1244 if (!saw_a_file)
1245 read_a_source_file ("");
1246 }
1247
1248
1249 int
main(int argc,char ** argv)1250 main (int argc, char ** argv)
1251 {
1252 char ** argv_orig = argv;
1253 struct stat sob;
1254
1255 int macro_strip_at;
1256
1257 start_time = get_run_time ();
1258 signal_init ();
1259
1260 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
1261 setlocale (LC_MESSAGES, "");
1262 #endif
1263 #if defined (HAVE_SETLOCALE)
1264 setlocale (LC_CTYPE, "");
1265 #endif
1266 bindtextdomain (PACKAGE, LOCALEDIR);
1267 textdomain (PACKAGE);
1268
1269 if (debug_memory)
1270 chunksize = 64;
1271
1272 #ifdef HOST_SPECIAL_INIT
1273 HOST_SPECIAL_INIT (argc, argv);
1274 #endif
1275
1276 myname = argv[0];
1277 xmalloc_set_program_name (myname);
1278
1279 expandargv (&argc, &argv);
1280
1281 START_PROGRESS (myname, 0);
1282
1283 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1284 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1285 #endif
1286
1287 out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
1288
1289 hex_init ();
1290 if (bfd_init () != BFD_INIT_MAGIC)
1291 as_fatal (_("libbfd ABI mismatch"));
1292 bfd_set_error_program_name (myname);
1293
1294 #ifdef USE_EMULATIONS
1295 select_emulation_mode (argc, argv);
1296 #endif
1297
1298 PROGRESS (1);
1299 /* Call parse_args before any of the init/begin functions
1300 so that switches like --hash-size can be honored. */
1301 parse_args (&argc, &argv);
1302
1303 if (argc > 1 && stat (out_file_name, &sob) == 0)
1304 {
1305 int i;
1306
1307 for (i = 1; i < argc; ++i)
1308 {
1309 struct stat sib;
1310
1311 /* Check that the input file and output file are different. */
1312 if (stat (argv[i], &sib) == 0
1313 && sib.st_ino == sob.st_ino
1314 /* POSIX emulating systems may support stat() but if the
1315 underlying file system does not support a file serial number
1316 of some kind then they will return 0 for the inode. So
1317 two files with an inode of 0 may not actually be the same.
1318 On real POSIX systems no ordinary file will ever have an
1319 inode of 0. */
1320 && sib.st_ino != 0
1321 /* Different files may have the same inode number if they
1322 reside on different devices, so check the st_dev field as
1323 well. */
1324 && sib.st_dev == sob.st_dev
1325 /* PR 25572: Only check regular files. Devices, sockets and so
1326 on might actually work as both input and output. Plus there
1327 is a use case for using /dev/null as both input and output
1328 when checking for command line option support in a script:
1329 as --foo /dev/null -o /dev/null; if $? then ... */
1330 && S_ISREG (sib.st_mode))
1331 {
1332 const char *saved_out_file_name = out_file_name;
1333
1334 /* Don't let as_fatal remove the output file! */
1335 out_file_name = NULL;
1336 as_fatal (_("The input '%s' and output '%s' files are the same"),
1337 argv[i], saved_out_file_name);
1338 }
1339 }
1340 }
1341
1342 symbol_begin ();
1343 frag_init ();
1344 subsegs_begin ();
1345 read_begin ();
1346 input_scrub_begin ();
1347 expr_begin ();
1348
1349 /* It has to be called after dump_statistics (). */
1350 xatexit (close_output_file);
1351
1352 if (flag_print_statistics)
1353 xatexit (dump_statistics);
1354
1355 macro_strip_at = 0;
1356 #ifdef TC_I960
1357 macro_strip_at = flag_mri;
1358 #endif
1359
1360 macro_init (flag_macro_alternate, flag_mri, macro_strip_at, macro_expr);
1361
1362 PROGRESS (1);
1363
1364 output_file_create (out_file_name);
1365 gas_assert (stdoutput != 0);
1366
1367 dot_symbol_init ();
1368
1369 #ifdef tc_init_after_args
1370 tc_init_after_args ();
1371 #endif
1372
1373 itbl_init ();
1374
1375 dwarf2_init ();
1376
1377 local_symbol_make (".gasversion.", absolute_section,
1378 &predefined_address_frag, BFD_VERSION / 10000UL);
1379
1380 /* Now that we have fully initialized, and have created the output
1381 file, define any symbols requested by --defsym command line
1382 arguments. */
1383 while (defsyms != NULL)
1384 {
1385 symbolS *sym;
1386 struct defsym_list *next;
1387
1388 sym = symbol_new (defsyms->name, absolute_section,
1389 &zero_address_frag, defsyms->value);
1390 /* Make symbols defined on the command line volatile, so that they
1391 can be redefined inside a source file. This makes this assembler's
1392 behaviour compatible with earlier versions, but it may not be
1393 completely intuitive. */
1394 S_SET_VOLATILE (sym);
1395 symbol_table_insert (sym);
1396 next = defsyms->next;
1397 free (defsyms);
1398 defsyms = next;
1399 }
1400
1401 PROGRESS (1);
1402
1403 /* Assemble it. */
1404 perform_an_assembly_pass (argc, argv);
1405
1406 cond_finish_check (-1);
1407
1408 #ifdef md_end
1409 md_end ();
1410 #endif
1411
1412 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1413 if ((flag_execstack || flag_noexecstack)
1414 && OUTPUT_FLAVOR == bfd_target_elf_flavour)
1415 {
1416 segT gnustack;
1417
1418 gnustack = subseg_new (".note.GNU-stack", 0);
1419 bfd_set_section_flags (gnustack,
1420 SEC_READONLY | (flag_execstack ? SEC_CODE : 0));
1421
1422 }
1423 #endif
1424
1425 /* If we've been collecting dwarf2 .debug_line info, either for
1426 assembly debugging or on behalf of the compiler, emit it now. */
1427 dwarf2_finish ();
1428
1429 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1430 directives from the user or by the backend, emit it now. */
1431 cfi_finish ();
1432
1433 keep_it = 0;
1434 if (seen_at_least_1_file ())
1435 {
1436 int n_warns, n_errs;
1437 char warn_msg[50];
1438 char err_msg[50];
1439
1440 write_object_file ();
1441
1442 n_warns = had_warnings ();
1443 n_errs = had_errors ();
1444
1445 sprintf (warn_msg,
1446 ngettext ("%d warning", "%d warnings", n_warns), n_warns);
1447 sprintf (err_msg,
1448 ngettext ("%d error", "%d errors", n_errs), n_errs);
1449 if (flag_fatal_warnings && n_warns != 0)
1450 {
1451 if (n_errs == 0)
1452 as_bad (_("%s, treating warnings as errors"), warn_msg);
1453 n_errs += n_warns;
1454 }
1455
1456 if (n_errs == 0)
1457 keep_it = 1;
1458 else if (flag_always_generate_output)
1459 {
1460 /* The -Z flag indicates that an object file should be generated,
1461 regardless of warnings and errors. */
1462 keep_it = 1;
1463 fprintf (stderr, _("%s, %s, generating bad object file\n"),
1464 err_msg, warn_msg);
1465 }
1466 }
1467
1468 fflush (stderr);
1469
1470 #ifndef NO_LISTING
1471 listing_print (listing_filename, argv_orig);
1472 #endif
1473
1474 input_scrub_end ();
1475
1476 END_PROGRESS (myname);
1477
1478 /* Use xexit instead of return, because under VMS environments they
1479 may not place the same interpretation on the value given. */
1480 if (had_errors () != 0)
1481 xexit (EXIT_FAILURE);
1482
1483 /* Only generate dependency file if assembler was successful. */
1484 print_dependencies ();
1485
1486 xexit (EXIT_SUCCESS);
1487 }
1488