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"));
248 fprintf (stream, _("\
249 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
250 compress DWARF debug sections using zlib\n"));
251 fprintf (stream, _("\
252 --nocompress-debug-sections\n\
253 don't compress DWARF debug sections\n"));
254 fprintf (stream, _("\
255 -D produce assembler debugging messages\n"));
256 fprintf (stream, _("\
257 --debug-prefix-map OLD=NEW\n\
258 map OLD to NEW in debug information\n"));
259 fprintf (stream, _("\
260 --defsym SYM=VAL define symbol SYM to given value\n"));
261 #ifdef USE_EMULATIONS
268 for (i = 0; i < n_emulations - 1; i++)
269 fprintf (stream, "%s | ", emulations[i]->name);
270 fprintf (stream, "%s]\n", emulations[i]->name);
272 def_em = getenv (EMULATION_ENVIRON);
274 def_em = DEFAULT_EMULATION;
275 fprintf (stream, _("\
276 emulate output (default %s)\n"), def_em);
279 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
280 fprintf (stream, _("\
281 --execstack require executable stack for this object\n"));
282 fprintf (stream, _("\
283 --noexecstack don't require executable stack for this object\n"));
284 fprintf (stream, _("\
285 --size-check=[error|warning]\n\
286 ELF .size directive check (default --size-check=error)\n"));
288 fprintf (stream, _("\
289 -f skip whitespace and comment preprocessing\n"));
290 fprintf (stream, _("\
291 -g --gen-debug generate debugging information\n"));
292 fprintf (stream, _("\
293 --gstabs generate STABS debugging information\n"));
294 fprintf (stream, _("\
295 --gstabs+ generate STABS debug info with GNU extensions\n"));
296 fprintf (stream, _("\
297 --gdwarf-2 generate DWARF2 debugging information\n"));
298 fprintf (stream, _("\
299 --gdwarf-sections generate per-function section names for DWARF line information\n"));
300 fprintf (stream, _("\
301 --hash-size=<value> set the hash table size close to <value>\n"));
302 fprintf (stream, _("\
303 --help show this message and exit\n"));
304 fprintf (stream, _("\
305 --target-help show target specific options\n"));
306 fprintf (stream, _("\
307 -I DIR add DIR to search list for .include directives\n"));
308 fprintf (stream, _("\
309 -J don't warn about signed overflow\n"));
310 fprintf (stream, _("\
311 -K warn when differences altered for long displacements\n"));
312 fprintf (stream, _("\
313 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
314 fprintf (stream, _("\
315 -M,--mri assemble in MRI compatibility mode\n"));
316 fprintf (stream, _("\
317 --MD FILE write dependency information in FILE (default none)\n"));
318 fprintf (stream, _("\
320 fprintf (stream, _("\
321 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
322 fprintf (stream, _("\
323 -R fold data section into text section\n"));
324 fprintf (stream, _("\
325 --reduce-memory-overheads \n\
326 prefer smaller memory use at the cost of longer\n\
328 fprintf (stream, _("\
329 --statistics print various measured statistics from execution\n"));
330 fprintf (stream, _("\
331 --strip-local-absolute strip local absolute symbols\n"));
332 fprintf (stream, _("\
333 --traditional-format Use same format as native assembler when possible\n"));
334 fprintf (stream, _("\
335 --version print assembler version number and exit\n"));
336 fprintf (stream, _("\
337 -W --no-warn suppress warnings\n"));
338 fprintf (stream, _("\
339 --warn don't suppress warnings\n"));
340 fprintf (stream, _("\
341 --fatal-warnings treat warnings as errors\n"));
343 fprintf (stream, _("\
344 --itbl INSTTBL extend instruction set to include instructions\n\
345 matching the specifications defined in file INSTTBL\n"));
347 fprintf (stream, _("\
349 fprintf (stream, _("\
351 fprintf (stream, _("\
352 -Z generate object file even after errors\n"));
353 fprintf (stream, _("\
354 --listing-lhs-width set the width in words of the output data column of\n\
356 fprintf (stream, _("\
357 --listing-lhs-width2 set the width in words of the continuation lines\n\
358 of the output data column; ignored if smaller than\n\
359 the width of the first line\n"));
360 fprintf (stream, _("\
361 --listing-rhs-width set the max width in characters of the lines from\n\
362 the source file\n"));
363 fprintf (stream, _("\
364 --listing-cont-lines set the maximum number of continuation lines used\n\
365 for the output data column of the listing\n"));
366 fprintf (stream, _("\
367 @FILE read options from FILE\n"));
369 md_show_usage (stream);
371 fputc ('\n', stream);
373 if (REPORT_BUGS_TO[0] && stream == stdout)
374 fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
377 /* Since it is easy to do here we interpret the special arg "-"
378 to mean "use stdin" and we set that argv[] pointing to "".
379 After we have munged argv[], the only things left are source file
380 name(s) and ""(s) denoting stdin. These file names are used
381 (perhaps more than once) later.
383 check for new machine-dep cmdline options in
384 md_parse_option definitions in config/tc-*.c. */
387 parse_args (int * pargc, char *** pargv)
393 /* Starting the short option string with '-' is for programs that
394 expect options and other ARGV-elements in any order and that care about
395 the ordering of the two. We describe each non-option ARGV-element
396 as if it were the argument of an option with character code 1. */
398 extern const char *md_shortopts;
399 static const char std_shortopts[] =
402 #ifndef WORKING_DOT_WORD
403 /* -K is not meaningful if .word is not being hacked. */
406 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
408 /* -v takes an argument on VMS, so we don't make it a generic
414 /* New option for extending instruction set (see also --itbl below). */
419 struct option *longopts;
420 extern struct option md_longopts[];
421 extern size_t md_longopts_size;
422 /* Codes used for the long options with no short synonyms. */
425 OPTION_HELP = OPTION_STD_BASE,
432 OPTION_DEBUG_PREFIX_MAP,
434 OPTION_LISTING_LHS_WIDTH,
435 OPTION_LISTING_LHS_WIDTH2,
436 OPTION_LISTING_RHS_WIDTH,
437 OPTION_LISTING_CONT_LINES,
442 OPTION_GDWARF_SECTIONS,
443 OPTION_STRIP_LOCAL_ABSOLUTE,
444 OPTION_TRADITIONAL_FORMAT,
452 OPTION_HASH_TABLE_SIZE,
453 OPTION_REDUCE_MEMORY_OVERHEADS,
455 OPTION_COMPRESS_DEBUG,
456 OPTION_NOCOMPRESS_DEBUG
457 /* When you add options here, check that they do
458 not collide with OPTION_MD_BASE. See as.h. */
461 static const struct option std_longopts[] =
463 /* Note: commas are placed at the start of the line rather than
464 the end of the preceding line so that it is simpler to
465 selectively add and remove lines from this list. */
466 {"alternate", no_argument, NULL, OPTION_ALTERNATE}
467 /* The entry for "a" is here to prevent getopt_long_only() from
468 considering that -a is an abbreviation for --alternate. This is
469 necessary because -a=<FILE> is a valid switch but getopt would
470 normally reject it since --alternate does not take an argument. */
471 ,{"a", optional_argument, NULL, 'a'}
472 /* Handle -al=<FILE>. */
473 ,{"al", optional_argument, NULL, OPTION_AL}
474 ,{"compress-debug-sections", optional_argument, NULL, OPTION_COMPRESS_DEBUG}
475 ,{"nocompress-debug-sections", no_argument, NULL, OPTION_NOCOMPRESS_DEBUG}
476 ,{"debug-prefix-map", required_argument, NULL, OPTION_DEBUG_PREFIX_MAP}
477 ,{"defsym", required_argument, NULL, OPTION_DEFSYM}
478 ,{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG}
479 ,{"emulation", required_argument, NULL, OPTION_EMULATION}
480 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
481 ,{"execstack", no_argument, NULL, OPTION_EXECSTACK}
482 ,{"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK}
483 ,{"size-check", required_argument, NULL, OPTION_SIZE_CHECK}
485 ,{"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL}
486 ,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF2}
487 /* GCC uses --gdwarf-2 but GAS uses to use --gdwarf2,
488 so we keep it here for backwards compatibility. */
489 ,{"gdwarf2", no_argument, NULL, OPTION_GDWARF2}
490 ,{"gdwarf-sections", no_argument, NULL, OPTION_GDWARF_SECTIONS}
491 ,{"gen-debug", no_argument, NULL, 'g'}
492 ,{"gstabs", no_argument, NULL, OPTION_GSTABS}
493 ,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS}
494 ,{"hash-size", required_argument, NULL, OPTION_HASH_TABLE_SIZE}
495 ,{"help", no_argument, NULL, OPTION_HELP}
497 /* New option for extending instruction set (see also -t above).
498 The "-t file" or "--itbl file" option extends the basic set of
499 valid instructions by reading "file", a text file containing a
500 list of instruction formats. The additional opcodes and their
501 formats are added to the built-in set of instructions, and
502 mnemonics for new registers may also be defined. */
503 ,{"itbl", required_argument, NULL, 't'}
505 /* getopt allows abbreviations, so we do this to stop it from
506 treating -k as an abbreviation for --keep-locals. Some
507 ports use -k to enable PIC assembly. */
508 ,{"keep-locals", no_argument, NULL, 'L'}
509 ,{"keep-locals", no_argument, NULL, 'L'}
510 ,{"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH}
511 ,{"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2}
512 ,{"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH}
513 ,{"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES}
514 ,{"MD", required_argument, NULL, OPTION_DEPFILE}
515 ,{"mri", no_argument, NULL, 'M'}
516 ,{"nocpp", no_argument, NULL, OPTION_NOCPP}
517 ,{"no-warn", no_argument, NULL, 'W'}
518 ,{"reduce-memory-overheads", no_argument, NULL, OPTION_REDUCE_MEMORY_OVERHEADS}
519 ,{"statistics", no_argument, NULL, OPTION_STATISTICS}
520 ,{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE}
521 ,{"version", no_argument, NULL, OPTION_VERSION}
522 ,{"verbose", no_argument, NULL, OPTION_VERBOSE}
523 ,{"target-help", no_argument, NULL, OPTION_TARGET_HELP}
524 ,{"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT}
525 ,{"warn", no_argument, NULL, OPTION_WARN}
528 /* Construct the option lists from the standard list and the target
529 dependent list. Include space for an extra NULL option and
530 always NULL terminate. */
531 shortopts = concat (std_shortopts, md_shortopts, (char *) NULL);
532 longopts = (struct option *) xmalloc (sizeof (std_longopts)
533 + md_longopts_size + sizeof (struct option));
534 memcpy (longopts, std_longopts, sizeof (std_longopts));
535 memcpy (((char *) longopts) + sizeof (std_longopts), md_longopts, md_longopts_size);
536 memset (((char *) longopts) + sizeof (std_longopts) + md_longopts_size,
537 0, sizeof (struct option));
539 /* Make a local copy of the old argv. */
543 /* Initialize a new argv that contains no options. */
544 new_argv = (char **) xmalloc (sizeof (char *) * (old_argc + 1));
545 new_argv[0] = old_argv[0];
547 new_argv[new_argc] = NULL;
551 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
552 indicate a long option. */
554 int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts,
563 /* md_parse_option should return 1 if it recognizes optc,
565 if (md_parse_option (optc, optarg) != 0)
567 /* `-v' isn't included in the general short_opts list, so check for
568 it explicitly here before deciding we've gotten a bad argument. */
572 /* Telling getopt to treat -v's value as optional can result
573 in it picking up a following filename argument here. The
574 VMS code in md_parse_option can return 0 in that case,
575 but it has no way of pushing the filename argument back. */
576 if (optarg && *optarg)
577 new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL;
588 as_bad (_("unrecognized option -%c%s"), optc, optarg ? optarg : "");
594 case 1: /* File name. */
595 if (!strcmp (optarg, "-"))
597 new_argv[new_argc++] = optarg;
598 new_argv[new_argc] = NULL;
601 case OPTION_TARGET_HELP:
602 md_show_usage (stdout);
612 case OPTION_STATISTICS:
613 flag_print_statistics = 1;
616 case OPTION_STRIP_LOCAL_ABSOLUTE:
617 flag_strip_local_absolute = 1;
620 case OPTION_TRADITIONAL_FORMAT:
621 flag_traditional_format = 1;
625 /* This output is intended to follow the GNU standards document. */
626 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING);
627 printf (_("Copyright (C) 2015 Free Software Foundation, Inc.\n"));
629 This program is free software; you may redistribute it under the terms of\n\
630 the GNU General Public License version 3 or later.\n\
631 This program has absolutely no warranty.\n"));
632 printf (_("This assembler was configured for a target of `%s'.\n"),
636 case OPTION_EMULATION:
637 #ifdef USE_EMULATIONS
638 if (strcmp (optarg, this_emulation->name))
639 as_fatal (_("multiple emulation names specified"));
641 as_fatal (_("emulations not handled in this configuration"));
645 case OPTION_DUMPCONFIG:
646 fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS);
647 fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL);
648 fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU);
649 #ifdef TARGET_OBJ_FORMAT
650 fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT);
653 fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT);
657 case OPTION_COMPRESS_DEBUG:
660 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
661 if (strcasecmp (optarg, "none") == 0)
662 flag_compress_debug = COMPRESS_DEBUG_NONE;
663 else if (strcasecmp (optarg, "zlib") == 0)
664 flag_compress_debug = COMPRESS_DEBUG_ZLIB;
665 else if (strcasecmp (optarg, "zlib-gnu") == 0)
666 flag_compress_debug = COMPRESS_DEBUG_GNU_ZLIB;
667 else if (strcasecmp (optarg, "zlib-gabi") == 0)
668 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
670 as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
673 as_fatal (_("--compress-debug-sections=%s is unsupported"),
678 flag_compress_debug = COMPRESS_DEBUG;
681 case OPTION_NOCOMPRESS_DEBUG:
682 flag_compress_debug = COMPRESS_DEBUG_NONE;
685 case OPTION_DEBUG_PREFIX_MAP:
686 add_debug_prefix_map (optarg);
693 struct defsym_list *n;
695 for (s = optarg; *s != '\0' && *s != '='; s++)
698 as_fatal (_("bad defsym; format is --defsym name=value"));
700 i = bfd_scan_vma (s, (const char **) NULL, 0);
701 n = (struct defsym_list *) xmalloc (sizeof *n);
712 /* optarg is the name of the file containing the instruction
713 formats, opcodes, register names, etc. */
714 struct itbl_file_list *n;
718 as_warn (_("no file name following -t option"));
722 n = xmalloc (sizeof * n);
723 n->next = itbl_files;
727 /* Parse the file and add the new instructions to our internal
728 table. If multiple instruction tables are specified, the
729 information from this table gets appended onto the existing
731 itbl_files->name = xstrdup (optarg);
732 if (itbl_parse (itbl_files->name) != 0)
733 as_fatal (_("failed to read instruction table %s\n"),
740 start_dependencies (optarg);
744 /* Some backends, eg Alpha and Mips, use the -g switch for their
745 own purposes. So we check here for an explicit -g and allow
746 the backend to decide if it wants to process it. */
747 if ( old_argv[optind - 1][1] == 'g'
748 && md_parse_option (optc, optarg))
751 if (md_debug_format_selector)
752 debug_type = md_debug_format_selector (& use_gnu_debug_info_extensions);
754 debug_type = DEBUG_DWARF2;
756 debug_type = DEBUG_STABS;
759 case OPTION_GSTABS_PLUS:
760 use_gnu_debug_info_extensions = 1;
763 debug_type = DEBUG_STABS;
767 debug_type = DEBUG_DWARF2;
770 case OPTION_GDWARF_SECTIONS:
771 flag_dwarf_sections = TRUE;
775 flag_signed_overflow_ok = 1;
778 #ifndef WORKING_DOT_WORD
780 flag_warn_displacement = 1;
784 flag_keep_locals = 1;
787 case OPTION_LISTING_LHS_WIDTH:
788 listing_lhs_width = atoi (optarg);
789 if (listing_lhs_width_second < listing_lhs_width)
790 listing_lhs_width_second = listing_lhs_width;
792 case OPTION_LISTING_LHS_WIDTH2:
794 int tmp = atoi (optarg);
796 if (tmp > listing_lhs_width)
797 listing_lhs_width_second = tmp;
800 case OPTION_LISTING_RHS_WIDTH:
801 listing_rhs_width = atoi (optarg);
803 case OPTION_LISTING_CONT_LINES:
804 listing_lhs_cont_lines = atoi (optarg);
815 flag_readonly_data_in_text = 1;
819 flag_no_warnings = 1;
823 flag_no_warnings = 0;
824 flag_fatal_warnings = 0;
827 case OPTION_WARN_FATAL:
828 flag_no_warnings = 0;
829 flag_fatal_warnings = 1;
832 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
833 case OPTION_EXECSTACK:
835 flag_noexecstack = 0;
838 case OPTION_NOEXECSTACK:
839 flag_noexecstack = 1;
843 case OPTION_SIZE_CHECK:
844 if (strcasecmp (optarg, "error") == 0)
845 flag_size_check = size_check_error;
846 else if (strcasecmp (optarg, "warning") == 0)
847 flag_size_check = size_check_warning;
849 as_fatal (_("Invalid --size-check= option: `%s'"), optarg);
853 flag_always_generate_output = 1;
857 listing |= LISTING_LISTING;
859 listing_filename = xstrdup (optarg);
862 case OPTION_ALTERNATE:
863 optarg = old_argv [optind - 1];
864 while (* optarg == '-')
867 if (strcmp (optarg, "alternate") == 0)
869 flag_macro_alternate = 1;
878 if (optarg != old_argv[optind] && optarg[-1] == '=')
881 if (md_parse_option (optc, optarg) != 0)
889 listing |= LISTING_NOCOND;
892 listing |= LISTING_NODEBUG;
895 listing |= LISTING_GENERAL;
898 listing |= LISTING_HLL;
901 listing |= LISTING_LISTING;
904 listing |= LISTING_MACEXP;
907 listing |= LISTING_NOFORM;
910 listing |= LISTING_SYMBOLS;
913 listing_filename = xstrdup (optarg + 1);
914 optarg += strlen (listing_filename);
917 as_fatal (_("invalid listing option `%c'"), *optarg);
924 listing = LISTING_DEFAULT;
928 /* DEBUG is implemented: it debugs different
929 things from other people's assemblers. */
934 flag_no_comments = 1;
938 { /* Include file directory. */
939 char *temp = xstrdup (optarg);
941 add_include_dir (temp);
946 out_file_name = xstrdup (optarg);
953 /* -X means treat warnings as errors. */
956 case OPTION_REDUCE_MEMORY_OVERHEADS:
957 /* The only change we make at the moment is to reduce
958 the size of the hash tables that we use. */
959 set_gas_hash_table_size (4051);
962 case OPTION_HASH_TABLE_SIZE:
964 unsigned long new_size;
966 new_size = strtoul (optarg, NULL, 0);
968 set_gas_hash_table_size (new_size);
970 as_fatal (_("--hash-size needs a numeric argument"));
982 #ifdef md_after_parse_args
983 md_after_parse_args ();
988 dump_statistics (void)
991 char *lim = (char *) sbrk (0);
993 long run_time = get_run_time () - start_time;
995 fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"),
996 myname, run_time / 1000000, run_time % 1000000);
998 fprintf (stderr, _("%s: data size %ld\n"),
999 myname, (long) (lim - start_sbrk));
1002 subsegs_print_statistics (stderr);
1003 write_print_statistics (stderr);
1004 symbol_print_statistics (stderr);
1005 read_print_statistics (stderr);
1007 #ifdef tc_print_statistics
1008 tc_print_statistics (stderr);
1011 #ifdef obj_print_statistics
1012 obj_print_statistics (stderr);
1017 close_output_file (void)
1019 output_file_close (out_file_name);
1021 unlink_if_ordinary (out_file_name);
1024 /* The interface between the macro code and gas expression handling. */
1027 macro_expr (const char *emsg, size_t idx, sb *in, offsetT *val)
1034 hold = input_line_pointer;
1035 input_line_pointer = in->ptr + idx;
1036 expression_and_evaluate (&ex);
1037 idx = input_line_pointer - in->ptr;
1038 input_line_pointer = hold;
1040 if (ex.X_op != O_constant)
1041 as_bad ("%s", emsg);
1043 *val = ex.X_add_number;
1048 /* Here to attempt 1 pass over each input file.
1049 We scan argv[*] looking for filenames or exactly "" which is
1050 shorthand for stdin. Any argv that is NULL is not a file-name.
1051 We set need_pass_2 TRUE if, after this, we still have unresolved
1052 expressions of the form (unknown value)+-(unknown value).
1054 Note the un*x semantics: there is only 1 logical input file, but it
1055 may be a catenation of many 'physical' input files. */
1058 perform_an_assembly_pass (int argc, char ** argv)
1062 flagword applicable;
1068 /* Create the standard sections, and those the assembler uses
1070 text_section = subseg_new (TEXT_SECTION_NAME, 0);
1071 data_section = subseg_new (DATA_SECTION_NAME, 0);
1072 bss_section = subseg_new (BSS_SECTION_NAME, 0);
1073 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1074 to have relocs, otherwise we don't find out in time. */
1075 applicable = bfd_applicable_section_flags (stdoutput);
1076 bfd_set_section_flags (stdoutput, text_section,
1077 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1078 | SEC_CODE | SEC_READONLY));
1079 bfd_set_section_flags (stdoutput, data_section,
1080 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1082 bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC);
1083 seg_info (bss_section)->bss = 1;
1085 subseg_new (BFD_ABS_SECTION_NAME, 0);
1086 subseg_new (BFD_UND_SECTION_NAME, 0);
1087 reg_section = subseg_new ("*GAS `reg' section*", 0);
1088 expr_section = subseg_new ("*GAS `expr' section*", 0);
1091 subseg_set (text_section, 0);
1094 /* This may add symbol table entries, which requires having an open BFD,
1095 and sections already created. */
1112 { /* Is it a file-name argument? */
1115 /* argv->"" if stdin desired, else->filename. */
1116 read_a_source_file (*argv);
1118 argv++; /* Completed that argv. */
1121 read_a_source_file ("");
1126 main (int argc, char ** argv)
1128 char ** argv_orig = argv;
1132 start_time = get_run_time ();
1134 start_sbrk = (char *) sbrk (0);
1137 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
1138 setlocale (LC_MESSAGES, "");
1140 #if defined (HAVE_SETLOCALE)
1141 setlocale (LC_CTYPE, "");
1143 bindtextdomain (PACKAGE, LOCALEDIR);
1144 textdomain (PACKAGE);
1149 #ifdef HOST_SPECIAL_INIT
1150 HOST_SPECIAL_INIT (argc, argv);
1154 xmalloc_set_program_name (myname);
1156 expandargv (&argc, &argv);
1158 START_PROGRESS (myname, 0);
1160 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1161 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1164 out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
1168 bfd_set_error_program_name (myname);
1170 #ifdef USE_EMULATIONS
1171 select_emulation_mode (argc, argv);
1175 /* Call parse_args before any of the init/begin functions
1176 so that switches like --hash-size can be honored. */
1177 parse_args (&argc, &argv);
1182 input_scrub_begin ();
1185 /* It has to be called after dump_statistics (). */
1186 xatexit (close_output_file);
1188 if (flag_print_statistics)
1189 xatexit (dump_statistics);
1193 macro_strip_at = flag_mri;
1196 macro_init (flag_macro_alternate, flag_mri, macro_strip_at, macro_expr);
1200 output_file_create (out_file_name);
1201 gas_assert (stdoutput != 0);
1205 #ifdef tc_init_after_args
1206 tc_init_after_args ();
1213 local_symbol_make (".gasversion.", absolute_section,
1214 BFD_VERSION / 10000UL, &predefined_address_frag);
1216 /* Now that we have fully initialized, and have created the output
1217 file, define any symbols requested by --defsym command line
1219 while (defsyms != NULL)
1222 struct defsym_list *next;
1224 sym = symbol_new (defsyms->name, absolute_section, defsyms->value,
1225 &zero_address_frag);
1226 /* Make symbols defined on the command line volatile, so that they
1227 can be redefined inside a source file. This makes this assembler's
1228 behaviour compatible with earlier versions, but it may not be
1229 completely intuitive. */
1230 S_SET_VOLATILE (sym);
1231 symbol_table_insert (sym);
1232 next = defsyms->next;
1240 perform_an_assembly_pass (argc, argv);
1242 cond_finish_check (-1);
1248 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1249 if ((flag_execstack || flag_noexecstack)
1250 && OUTPUT_FLAVOR == bfd_target_elf_flavour)
1254 gnustack = subseg_new (".note.GNU-stack", 0);
1255 bfd_set_section_flags (stdoutput, gnustack,
1256 SEC_READONLY | (flag_execstack ? SEC_CODE : 0));
1261 /* If we've been collecting dwarf2 .debug_line info, either for
1262 assembly debugging or on behalf of the compiler, emit it now. */
1265 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1266 directives from the user or by the backend, emit it now. */
1270 if (seen_at_least_1_file ())
1272 int n_warns, n_errs;
1276 write_object_file ();
1278 n_warns = had_warnings ();
1279 n_errs = had_errors ();
1282 sprintf (warn_msg, _("%d warning"), n_warns);
1284 sprintf (warn_msg, _("%d warnings"), n_warns);
1286 sprintf (err_msg, _("%d error"), n_errs);
1288 sprintf (err_msg, _("%d errors"), n_errs);
1290 if (flag_fatal_warnings && n_warns != 0)
1293 as_bad (_("%s, treating warnings as errors"), warn_msg);
1299 else if (flag_always_generate_output)
1301 /* The -Z flag indicates that an object file should be generated,
1302 regardless of warnings and errors. */
1304 fprintf (stderr, _("%s, %s, generating bad object file\n"),
1312 listing_print (listing_filename, argv_orig);
1317 END_PROGRESS (myname);
1319 /* Use xexit instead of return, because under VMS environments they
1320 may not place the same interpretation on the value given. */
1321 if (had_errors () != 0)
1322 xexit (EXIT_FAILURE);
1324 /* Only generate dependency file if assembler was successful. */
1325 print_dependencies ();
1327 xexit (EXIT_SUCCESS);