1 /* as.c - GAS main program.
2 Copyright (C) 1987-2015 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
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)
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.
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
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
29 Since no-one else says they will support them in future: I
30 don't support them now. */
36 #include "output-file.h"
39 #include "dwarf2dbg.h"
40 #include "dw2gencfi.h"
50 #ifdef NEED_DECLARATION_SBRK
56 /* Perform any cgen specific initialisation for gas. */
57 extern void gas_cgen_begin (void);
60 /* We build a list of defsyms as we read the options, and then define
61 them after we have initialized everything. */
64 struct defsym_list *next;
70 /* True if a listing is wanted. */
73 /* Type of debugging to generate. */
74 enum debug_info_type debug_type = DEBUG_UNSPECIFIED;
75 int use_gnu_debug_info_extensions = 0;
77 #ifndef MD_DEBUG_FORMAT_SELECTOR
78 #define MD_DEBUG_FORMAT_SELECTOR NULL
80 static enum debug_info_type (*md_debug_format_selector) (int *) = MD_DEBUG_FORMAT_SELECTOR;
82 /* Maximum level of macro nesting. */
83 int max_macro_nest = 100;
88 /* The default obstack chunk size. If we set this to zero, the
89 obstack code will use whatever will fit in a 4096 byte block. */
92 /* To monitor memory allocation more effectively, make this non-zero.
93 Then the chunk sizes for gas and bfd will be reduced. */
96 /* Enable verbose mode. */
99 /* Keep the output file. */
100 static int keep_it = 0;
108 /* Name of listing file. */
109 static char *listing_filename = NULL;
111 static struct defsym_list *defsyms;
114 /* Keep a record of the itbl files we read in. */
115 struct itbl_file_list
117 struct itbl_file_list *next;
120 static struct itbl_file_list *itbl_files;
123 static long start_time;
128 static int flag_macro_alternate;
131 #ifdef USE_EMULATIONS
132 #define EMULATION_ENVIRON "AS_EMULATION"
134 extern struct emulation mipsbelf, mipslelf, mipself;
135 extern struct emulation i386coff, i386elf, i386aout;
136 extern struct emulation crisaout, criself;
138 static struct emulation *const emulations[] = { EMULATIONS };
139 static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]);
142 select_emulation_mode (int argc, char **argv)
147 for (i = 1; i < argc; i++)
148 if (!strncmp ("--em", argv[i], 4))
154 p = strchr (argv[i], '=');
161 as_fatal (_("missing emulation mode name"));
166 em = getenv (EMULATION_ENVIRON);
168 em = DEFAULT_EMULATION;
172 for (i = 0; i < n_emulations; i++)
173 if (!strcmp (emulations[i]->name, em))
175 if (i == n_emulations)
176 as_fatal (_("unrecognized emulation name `%s'"), em);
177 this_emulation = emulations[i];
180 this_emulation = emulations[0];
182 this_emulation->init ();
186 default_emul_bfd_name (void)
193 common_emul_init (void)
195 this_format = this_emulation->format;
197 if (this_emulation->leading_underscore == 2)
198 this_emulation->leading_underscore = this_format->dfl_leading_underscore;
200 if (this_emulation->default_endian != 2)
201 target_big_endian = this_emulation->default_endian;
203 if (this_emulation->fake_label_name == 0)
205 if (this_emulation->leading_underscore)
206 this_emulation->fake_label_name = "L0\001";
208 /* What other parameters should we test? */
209 this_emulation->fake_label_name = ".L0\001";
215 print_version_id (void)
223 fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s\n"),
224 VERSION, TARGET_ALIAS, BFD_VERSION_STRING);
228 show_usage (FILE * stream)
230 fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname);
232 fprintf (stream, _("\
234 -a[sub-option...] turn on listings\n\
235 Sub-options [default hls]:\n\
236 c omit false conditionals\n\
237 d omit debugging directives\n\
238 g include general info\n\
239 h include high-level source\n\
240 l include assembly\n\
241 m include macro expansions\n\
242 n omit forms processing\n\
244 =FILE list to FILE (must be last sub-option)\n"));
246 fprintf (stream, _("\
247 --alternate initially turn on alternate macro syntax\n"));
249 fprintf (stream, _("\
250 --compress-debug-sections\n\
251 compress DWARF debug sections using zlib\n"));
252 fprintf (stream, _("\
253 --nocompress-debug-sections\n\
254 don't compress DWARF debug sections\n"));
255 #endif /* HAVE_ZLIB_H */
256 fprintf (stream, _("\
257 -D produce assembler debugging messages\n"));
258 fprintf (stream, _("\
259 --debug-prefix-map OLD=NEW\n\
260 map OLD to NEW in debug information\n"));
261 fprintf (stream, _("\
262 --defsym SYM=VAL define symbol SYM to given value\n"));
263 #ifdef USE_EMULATIONS
270 for (i = 0; i < n_emulations - 1; i++)
271 fprintf (stream, "%s | ", emulations[i]->name);
272 fprintf (stream, "%s]\n", emulations[i]->name);
274 def_em = getenv (EMULATION_ENVIRON);
276 def_em = DEFAULT_EMULATION;
277 fprintf (stream, _("\
278 emulate output (default %s)\n"), def_em);
281 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
282 fprintf (stream, _("\
283 --execstack require executable stack for this object\n"));
284 fprintf (stream, _("\
285 --noexecstack don't require executable stack for this object\n"));
286 fprintf (stream, _("\
287 --size-check=[error|warning]\n\
288 ELF .size directive check (default --size-check=error)\n"));
290 fprintf (stream, _("\
291 -f skip whitespace and comment preprocessing\n"));
292 fprintf (stream, _("\
293 -g --gen-debug generate debugging information\n"));
294 fprintf (stream, _("\
295 --gstabs generate STABS debugging information\n"));
296 fprintf (stream, _("\
297 --gstabs+ generate STABS debug info with GNU extensions\n"));
298 fprintf (stream, _("\
299 --gdwarf-2 generate DWARF2 debugging information\n"));
300 fprintf (stream, _("\
301 --gdwarf-sections generate per-function section names for DWARF line information\n"));
302 fprintf (stream, _("\
303 --hash-size=<value> set the hash table size close to <value>\n"));
304 fprintf (stream, _("\
305 --help show this message and exit\n"));
306 fprintf (stream, _("\
307 --target-help show target specific options\n"));
308 fprintf (stream, _("\
309 -I DIR add DIR to search list for .include directives\n"));
310 fprintf (stream, _("\
311 -J don't warn about signed overflow\n"));
312 fprintf (stream, _("\
313 -K warn when differences altered for long displacements\n"));
314 fprintf (stream, _("\
315 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
316 fprintf (stream, _("\
317 -M,--mri assemble in MRI compatibility mode\n"));
318 fprintf (stream, _("\
319 --MD FILE write dependency information in FILE (default none)\n"));
320 fprintf (stream, _("\
322 fprintf (stream, _("\
323 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
324 fprintf (stream, _("\
325 -R fold data section into text section\n"));
326 fprintf (stream, _("\
327 --reduce-memory-overheads \n\
328 prefer smaller memory use at the cost of longer\n\
330 fprintf (stream, _("\
331 --statistics print various measured statistics from execution\n"));
332 fprintf (stream, _("\
333 --strip-local-absolute strip local absolute symbols\n"));
334 fprintf (stream, _("\
335 --traditional-format Use same format as native assembler when possible\n"));
336 fprintf (stream, _("\
337 --version print assembler version number and exit\n"));
338 fprintf (stream, _("\
339 -W --no-warn suppress warnings\n"));
340 fprintf (stream, _("\
341 --warn don't suppress warnings\n"));
342 fprintf (stream, _("\
343 --fatal-warnings treat warnings as errors\n"));
345 fprintf (stream, _("\
346 --itbl INSTTBL extend instruction set to include instructions\n\
347 matching the specifications defined in file INSTTBL\n"));
349 fprintf (stream, _("\
351 fprintf (stream, _("\
353 fprintf (stream, _("\
354 -Z generate object file even after errors\n"));
355 fprintf (stream, _("\
356 --listing-lhs-width set the width in words of the output data column of\n\
358 fprintf (stream, _("\
359 --listing-lhs-width2 set the width in words of the continuation lines\n\
360 of the output data column; ignored if smaller than\n\
361 the width of the first line\n"));
362 fprintf (stream, _("\
363 --listing-rhs-width set the max width in characters of the lines from\n\
364 the source file\n"));
365 fprintf (stream, _("\
366 --listing-cont-lines set the maximum number of continuation lines used\n\
367 for the output data column of the listing\n"));
368 fprintf (stream, _("\
369 @FILE read options from FILE\n"));
371 md_show_usage (stream);
373 fputc ('\n', stream);
375 if (REPORT_BUGS_TO[0] && stream == stdout)
376 fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
379 /* Since it is easy to do here we interpret the special arg "-"
380 to mean "use stdin" and we set that argv[] pointing to "".
381 After we have munged argv[], the only things left are source file
382 name(s) and ""(s) denoting stdin. These file names are used
383 (perhaps more than once) later.
385 check for new machine-dep cmdline options in
386 md_parse_option definitions in config/tc-*.c. */
389 parse_args (int * pargc, char *** pargv)
395 /* Starting the short option string with '-' is for programs that
396 expect options and other ARGV-elements in any order and that care about
397 the ordering of the two. We describe each non-option ARGV-element
398 as if it were the argument of an option with character code 1. */
400 extern const char *md_shortopts;
401 static const char std_shortopts[] =
404 #ifndef WORKING_DOT_WORD
405 /* -K is not meaningful if .word is not being hacked. */
408 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
410 /* -v takes an argument on VMS, so we don't make it a generic
416 /* New option for extending instruction set (see also --itbl below). */
421 struct option *longopts;
422 extern struct option md_longopts[];
423 extern size_t md_longopts_size;
424 /* Codes used for the long options with no short synonyms. */
427 OPTION_HELP = OPTION_STD_BASE,
434 OPTION_DEBUG_PREFIX_MAP,
436 OPTION_LISTING_LHS_WIDTH,
437 OPTION_LISTING_LHS_WIDTH2,
438 OPTION_LISTING_RHS_WIDTH,
439 OPTION_LISTING_CONT_LINES,
444 OPTION_GDWARF_SECTIONS,
445 OPTION_STRIP_LOCAL_ABSOLUTE,
446 OPTION_TRADITIONAL_FORMAT,
454 OPTION_HASH_TABLE_SIZE,
455 OPTION_REDUCE_MEMORY_OVERHEADS,
457 OPTION_COMPRESS_DEBUG,
458 OPTION_NOCOMPRESS_DEBUG
459 /* When you add options here, check that they do
460 not collide with OPTION_MD_BASE. See as.h. */
463 static const struct option std_longopts[] =
465 /* Note: commas are placed at the start of the line rather than
466 the end of the preceding line so that it is simpler to
467 selectively add and remove lines from this list. */
468 {"alternate", no_argument, NULL, OPTION_ALTERNATE}
469 /* The entry for "a" is here to prevent getopt_long_only() from
470 considering that -a is an abbreviation for --alternate. This is
471 necessary because -a=<FILE> is a valid switch but getopt would
472 normally reject it since --alternate does not take an argument. */
473 ,{"a", optional_argument, NULL, 'a'}
474 /* Handle -al=<FILE>. */
475 ,{"al", optional_argument, NULL, OPTION_AL}
476 ,{"compress-debug-sections", no_argument, NULL, OPTION_COMPRESS_DEBUG}
477 ,{"nocompress-debug-sections", no_argument, NULL, OPTION_NOCOMPRESS_DEBUG}
478 ,{"debug-prefix-map", required_argument, NULL, OPTION_DEBUG_PREFIX_MAP}
479 ,{"defsym", required_argument, NULL, OPTION_DEFSYM}
480 ,{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG}
481 ,{"emulation", required_argument, NULL, OPTION_EMULATION}
482 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
483 ,{"execstack", no_argument, NULL, OPTION_EXECSTACK}
484 ,{"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK}
485 ,{"size-check", required_argument, NULL, OPTION_SIZE_CHECK}
487 ,{"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL}
488 ,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF2}
489 /* GCC uses --gdwarf-2 but GAS uses to use --gdwarf2,
490 so we keep it here for backwards compatibility. */
491 ,{"gdwarf2", no_argument, NULL, OPTION_GDWARF2}
492 ,{"gdwarf-sections", no_argument, NULL, OPTION_GDWARF_SECTIONS}
493 ,{"gen-debug", no_argument, NULL, 'g'}
494 ,{"gstabs", no_argument, NULL, OPTION_GSTABS}
495 ,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS}
496 ,{"hash-size", required_argument, NULL, OPTION_HASH_TABLE_SIZE}
497 ,{"help", no_argument, NULL, OPTION_HELP}
499 /* New option for extending instruction set (see also -t above).
500 The "-t file" or "--itbl file" option extends the basic set of
501 valid instructions by reading "file", a text file containing a
502 list of instruction formats. The additional opcodes and their
503 formats are added to the built-in set of instructions, and
504 mnemonics for new registers may also be defined. */
505 ,{"itbl", required_argument, NULL, 't'}
507 /* getopt allows abbreviations, so we do this to stop it from
508 treating -k as an abbreviation for --keep-locals. Some
509 ports use -k to enable PIC assembly. */
510 ,{"keep-locals", no_argument, NULL, 'L'}
511 ,{"keep-locals", no_argument, NULL, 'L'}
512 ,{"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH}
513 ,{"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2}
514 ,{"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH}
515 ,{"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES}
516 ,{"MD", required_argument, NULL, OPTION_DEPFILE}
517 ,{"mri", no_argument, NULL, 'M'}
518 ,{"nocpp", no_argument, NULL, OPTION_NOCPP}
519 ,{"no-warn", no_argument, NULL, 'W'}
520 ,{"reduce-memory-overheads", no_argument, NULL, OPTION_REDUCE_MEMORY_OVERHEADS}
521 ,{"statistics", no_argument, NULL, OPTION_STATISTICS}
522 ,{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE}
523 ,{"version", no_argument, NULL, OPTION_VERSION}
524 ,{"verbose", no_argument, NULL, OPTION_VERBOSE}
525 ,{"target-help", no_argument, NULL, OPTION_TARGET_HELP}
526 ,{"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT}
527 ,{"warn", no_argument, NULL, OPTION_WARN}
530 /* Construct the option lists from the standard list and the target
531 dependent list. Include space for an extra NULL option and
532 always NULL terminate. */
533 shortopts = concat (std_shortopts, md_shortopts, (char *) NULL);
534 longopts = (struct option *) xmalloc (sizeof (std_longopts)
535 + md_longopts_size + sizeof (struct option));
536 memcpy (longopts, std_longopts, sizeof (std_longopts));
537 memcpy (((char *) longopts) + sizeof (std_longopts), md_longopts, md_longopts_size);
538 memset (((char *) longopts) + sizeof (std_longopts) + md_longopts_size,
539 0, sizeof (struct option));
541 /* Make a local copy of the old argv. */
545 /* Initialize a new argv that contains no options. */
546 new_argv = (char **) xmalloc (sizeof (char *) * (old_argc + 1));
547 new_argv[0] = old_argv[0];
549 new_argv[new_argc] = NULL;
553 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
554 indicate a long option. */
556 int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts,
565 /* md_parse_option should return 1 if it recognizes optc,
567 if (md_parse_option (optc, optarg) != 0)
569 /* `-v' isn't included in the general short_opts list, so check for
570 it explicitly here before deciding we've gotten a bad argument. */
574 /* Telling getopt to treat -v's value as optional can result
575 in it picking up a following filename argument here. The
576 VMS code in md_parse_option can return 0 in that case,
577 but it has no way of pushing the filename argument back. */
578 if (optarg && *optarg)
579 new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL;
590 as_bad (_("unrecognized option -%c%s"), optc, optarg ? optarg : "");
596 case 1: /* File name. */
597 if (!strcmp (optarg, "-"))
599 new_argv[new_argc++] = optarg;
600 new_argv[new_argc] = NULL;
603 case OPTION_TARGET_HELP:
604 md_show_usage (stdout);
614 case OPTION_STATISTICS:
615 flag_print_statistics = 1;
618 case OPTION_STRIP_LOCAL_ABSOLUTE:
619 flag_strip_local_absolute = 1;
622 case OPTION_TRADITIONAL_FORMAT:
623 flag_traditional_format = 1;
627 /* This output is intended to follow the GNU standards document. */
628 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING);
629 printf (_("Copyright (C) 2015 Free Software Foundation, Inc.\n"));
631 This program is free software; you may redistribute it under the terms of\n\
632 the GNU General Public License version 3 or later.\n\
633 This program has absolutely no warranty.\n"));
634 printf (_("This assembler was configured for a target of `%s'.\n"),
638 case OPTION_EMULATION:
639 #ifdef USE_EMULATIONS
640 if (strcmp (optarg, this_emulation->name))
641 as_fatal (_("multiple emulation names specified"));
643 as_fatal (_("emulations not handled in this configuration"));
647 case OPTION_DUMPCONFIG:
648 fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS);
649 fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL);
650 fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU);
651 #ifdef TARGET_OBJ_FORMAT
652 fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT);
655 fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT);
659 case OPTION_COMPRESS_DEBUG:
661 flag_compress_debug = 1;
663 as_warn (_("cannot compress debug sections (zlib not installed)"));
664 #endif /* HAVE_ZLIB_H */
667 case OPTION_NOCOMPRESS_DEBUG:
668 flag_compress_debug = 0;
671 case OPTION_DEBUG_PREFIX_MAP:
672 add_debug_prefix_map (optarg);
679 struct defsym_list *n;
681 for (s = optarg; *s != '\0' && *s != '='; s++)
684 as_fatal (_("bad defsym; format is --defsym name=value"));
686 i = bfd_scan_vma (s, (const char **) NULL, 0);
687 n = (struct defsym_list *) xmalloc (sizeof *n);
698 /* optarg is the name of the file containing the instruction
699 formats, opcodes, register names, etc. */
700 struct itbl_file_list *n;
704 as_warn (_("no file name following -t option"));
708 n = xmalloc (sizeof * n);
709 n->next = itbl_files;
713 /* Parse the file and add the new instructions to our internal
714 table. If multiple instruction tables are specified, the
715 information from this table gets appended onto the existing
717 itbl_files->name = xstrdup (optarg);
718 if (itbl_parse (itbl_files->name) != 0)
719 as_fatal (_("failed to read instruction table %s\n"),
726 start_dependencies (optarg);
730 /* Some backends, eg Alpha and Mips, use the -g switch for their
731 own purposes. So we check here for an explicit -g and allow
732 the backend to decide if it wants to process it. */
733 if ( old_argv[optind - 1][1] == 'g'
734 && md_parse_option (optc, optarg))
737 if (md_debug_format_selector)
738 debug_type = md_debug_format_selector (& use_gnu_debug_info_extensions);
740 debug_type = DEBUG_DWARF2;
742 debug_type = DEBUG_STABS;
745 case OPTION_GSTABS_PLUS:
746 use_gnu_debug_info_extensions = 1;
749 debug_type = DEBUG_STABS;
753 debug_type = DEBUG_DWARF2;
756 case OPTION_GDWARF_SECTIONS:
757 flag_dwarf_sections = TRUE;
761 flag_signed_overflow_ok = 1;
764 #ifndef WORKING_DOT_WORD
766 flag_warn_displacement = 1;
770 flag_keep_locals = 1;
773 case OPTION_LISTING_LHS_WIDTH:
774 listing_lhs_width = atoi (optarg);
775 if (listing_lhs_width_second < listing_lhs_width)
776 listing_lhs_width_second = listing_lhs_width;
778 case OPTION_LISTING_LHS_WIDTH2:
780 int tmp = atoi (optarg);
782 if (tmp > listing_lhs_width)
783 listing_lhs_width_second = tmp;
786 case OPTION_LISTING_RHS_WIDTH:
787 listing_rhs_width = atoi (optarg);
789 case OPTION_LISTING_CONT_LINES:
790 listing_lhs_cont_lines = atoi (optarg);
801 flag_readonly_data_in_text = 1;
805 flag_no_warnings = 1;
809 flag_no_warnings = 0;
810 flag_fatal_warnings = 0;
813 case OPTION_WARN_FATAL:
814 flag_no_warnings = 0;
815 flag_fatal_warnings = 1;
818 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
819 case OPTION_EXECSTACK:
821 flag_noexecstack = 0;
824 case OPTION_NOEXECSTACK:
825 flag_noexecstack = 1;
829 case OPTION_SIZE_CHECK:
830 if (strcasecmp (optarg, "error") == 0)
831 flag_size_check = size_check_error;
832 else if (strcasecmp (optarg, "warning") == 0)
833 flag_size_check = size_check_warning;
835 as_fatal (_("Invalid --size-check= option: `%s'"), optarg);
839 flag_always_generate_output = 1;
843 listing |= LISTING_LISTING;
845 listing_filename = xstrdup (optarg);
848 case OPTION_ALTERNATE:
849 optarg = old_argv [optind - 1];
850 while (* optarg == '-')
853 if (strcmp (optarg, "alternate") == 0)
855 flag_macro_alternate = 1;
864 if (optarg != old_argv[optind] && optarg[-1] == '=')
867 if (md_parse_option (optc, optarg) != 0)
875 listing |= LISTING_NOCOND;
878 listing |= LISTING_NODEBUG;
881 listing |= LISTING_GENERAL;
884 listing |= LISTING_HLL;
887 listing |= LISTING_LISTING;
890 listing |= LISTING_MACEXP;
893 listing |= LISTING_NOFORM;
896 listing |= LISTING_SYMBOLS;
899 listing_filename = xstrdup (optarg + 1);
900 optarg += strlen (listing_filename);
903 as_fatal (_("invalid listing option `%c'"), *optarg);
910 listing = LISTING_DEFAULT;
914 /* DEBUG is implemented: it debugs different
915 things from other people's assemblers. */
920 flag_no_comments = 1;
924 { /* Include file directory. */
925 char *temp = xstrdup (optarg);
927 add_include_dir (temp);
932 out_file_name = xstrdup (optarg);
939 /* -X means treat warnings as errors. */
942 case OPTION_REDUCE_MEMORY_OVERHEADS:
943 /* The only change we make at the moment is to reduce
944 the size of the hash tables that we use. */
945 set_gas_hash_table_size (4051);
948 case OPTION_HASH_TABLE_SIZE:
950 unsigned long new_size;
952 new_size = strtoul (optarg, NULL, 0);
954 set_gas_hash_table_size (new_size);
956 as_fatal (_("--hash-size needs a numeric argument"));
968 #ifdef md_after_parse_args
969 md_after_parse_args ();
974 dump_statistics (void)
977 char *lim = (char *) sbrk (0);
979 long run_time = get_run_time () - start_time;
981 fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"),
982 myname, run_time / 1000000, run_time % 1000000);
984 fprintf (stderr, _("%s: data size %ld\n"),
985 myname, (long) (lim - start_sbrk));
988 subsegs_print_statistics (stderr);
989 write_print_statistics (stderr);
990 symbol_print_statistics (stderr);
991 read_print_statistics (stderr);
993 #ifdef tc_print_statistics
994 tc_print_statistics (stderr);
997 #ifdef obj_print_statistics
998 obj_print_statistics (stderr);
1003 close_output_file (void)
1005 output_file_close (out_file_name);
1007 unlink_if_ordinary (out_file_name);
1010 /* The interface between the macro code and gas expression handling. */
1013 macro_expr (const char *emsg, size_t idx, sb *in, offsetT *val)
1020 hold = input_line_pointer;
1021 input_line_pointer = in->ptr + idx;
1022 expression_and_evaluate (&ex);
1023 idx = input_line_pointer - in->ptr;
1024 input_line_pointer = hold;
1026 if (ex.X_op != O_constant)
1027 as_bad ("%s", emsg);
1029 *val = ex.X_add_number;
1034 /* Here to attempt 1 pass over each input file.
1035 We scan argv[*] looking for filenames or exactly "" which is
1036 shorthand for stdin. Any argv that is NULL is not a file-name.
1037 We set need_pass_2 TRUE if, after this, we still have unresolved
1038 expressions of the form (unknown value)+-(unknown value).
1040 Note the un*x semantics: there is only 1 logical input file, but it
1041 may be a catenation of many 'physical' input files. */
1044 perform_an_assembly_pass (int argc, char ** argv)
1048 flagword applicable;
1054 /* Create the standard sections, and those the assembler uses
1056 text_section = subseg_new (TEXT_SECTION_NAME, 0);
1057 data_section = subseg_new (DATA_SECTION_NAME, 0);
1058 bss_section = subseg_new (BSS_SECTION_NAME, 0);
1059 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1060 to have relocs, otherwise we don't find out in time. */
1061 applicable = bfd_applicable_section_flags (stdoutput);
1062 bfd_set_section_flags (stdoutput, text_section,
1063 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1064 | SEC_CODE | SEC_READONLY));
1065 bfd_set_section_flags (stdoutput, data_section,
1066 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1068 bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC);
1069 seg_info (bss_section)->bss = 1;
1071 subseg_new (BFD_ABS_SECTION_NAME, 0);
1072 subseg_new (BFD_UND_SECTION_NAME, 0);
1073 reg_section = subseg_new ("*GAS `reg' section*", 0);
1074 expr_section = subseg_new ("*GAS `expr' section*", 0);
1077 subseg_set (text_section, 0);
1080 /* This may add symbol table entries, which requires having an open BFD,
1081 and sections already created. */
1098 { /* Is it a file-name argument? */
1101 /* argv->"" if stdin desired, else->filename. */
1102 read_a_source_file (*argv);
1104 argv++; /* Completed that argv. */
1107 read_a_source_file ("");
1112 main (int argc, char ** argv)
1114 char ** argv_orig = argv;
1118 start_time = get_run_time ();
1120 start_sbrk = (char *) sbrk (0);
1123 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
1124 setlocale (LC_MESSAGES, "");
1126 #if defined (HAVE_SETLOCALE)
1127 setlocale (LC_CTYPE, "");
1129 bindtextdomain (PACKAGE, LOCALEDIR);
1130 textdomain (PACKAGE);
1135 #ifdef HOST_SPECIAL_INIT
1136 HOST_SPECIAL_INIT (argc, argv);
1140 xmalloc_set_program_name (myname);
1142 expandargv (&argc, &argv);
1144 START_PROGRESS (myname, 0);
1146 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1147 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1150 out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
1154 bfd_set_error_program_name (myname);
1156 #ifdef USE_EMULATIONS
1157 select_emulation_mode (argc, argv);
1161 /* Call parse_args before any of the init/begin functions
1162 so that switches like --hash-size can be honored. */
1163 parse_args (&argc, &argv);
1168 input_scrub_begin ();
1171 /* It has to be called after dump_statistics (). */
1172 xatexit (close_output_file);
1174 if (flag_print_statistics)
1175 xatexit (dump_statistics);
1179 macro_strip_at = flag_mri;
1182 macro_init (flag_macro_alternate, flag_mri, macro_strip_at, macro_expr);
1186 output_file_create (out_file_name);
1187 gas_assert (stdoutput != 0);
1191 #ifdef tc_init_after_args
1192 tc_init_after_args ();
1199 local_symbol_make (".gasversion.", absolute_section,
1200 BFD_VERSION / 10000UL, &predefined_address_frag);
1202 /* Now that we have fully initialized, and have created the output
1203 file, define any symbols requested by --defsym command line
1205 while (defsyms != NULL)
1208 struct defsym_list *next;
1210 sym = symbol_new (defsyms->name, absolute_section, defsyms->value,
1211 &zero_address_frag);
1212 /* Make symbols defined on the command line volatile, so that they
1213 can be redefined inside a source file. This makes this assembler's
1214 behaviour compatible with earlier versions, but it may not be
1215 completely intuitive. */
1216 S_SET_VOLATILE (sym);
1217 symbol_table_insert (sym);
1218 next = defsyms->next;
1226 perform_an_assembly_pass (argc, argv);
1228 cond_finish_check (-1);
1234 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1235 if ((flag_execstack || flag_noexecstack)
1236 && OUTPUT_FLAVOR == bfd_target_elf_flavour)
1240 gnustack = subseg_new (".note.GNU-stack", 0);
1241 bfd_set_section_flags (stdoutput, gnustack,
1242 SEC_READONLY | (flag_execstack ? SEC_CODE : 0));
1247 /* If we've been collecting dwarf2 .debug_line info, either for
1248 assembly debugging or on behalf of the compiler, emit it now. */
1251 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1252 directives from the user or by the backend, emit it now. */
1256 if (seen_at_least_1_file ())
1258 int n_warns, n_errs;
1262 write_object_file ();
1264 n_warns = had_warnings ();
1265 n_errs = had_errors ();
1268 sprintf (warn_msg, _("%d warning"), n_warns);
1270 sprintf (warn_msg, _("%d warnings"), n_warns);
1272 sprintf (err_msg, _("%d error"), n_errs);
1274 sprintf (err_msg, _("%d errors"), n_errs);
1276 if (flag_fatal_warnings && n_warns != 0)
1279 as_bad (_("%s, treating warnings as errors"), warn_msg);
1285 else if (flag_always_generate_output)
1287 /* The -Z flag indicates that an object file should be generated,
1288 regardless of warnings and errors. */
1290 fprintf (stderr, _("%s, %s, generating bad object file\n"),
1298 listing_print (listing_filename, argv_orig);
1303 END_PROGRESS (myname);
1305 /* Use xexit instead of return, because under VMS environments they
1306 may not place the same interpretation on the value given. */
1307 if (had_errors () != 0)
1308 xexit (EXIT_FAILURE);
1310 /* Only generate dependency file if assembler was successful. */
1311 print_dependencies ();
1313 xexit (EXIT_SUCCESS);