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"));
287 fprintf (stream, _("\
288 --sectname-subst enable section name substitution sequences\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,
452 OPTION_SECTNAME_SUBST,
455 OPTION_HASH_TABLE_SIZE,
456 OPTION_REDUCE_MEMORY_OVERHEADS,
458 OPTION_COMPRESS_DEBUG,
459 OPTION_NOCOMPRESS_DEBUG
460 /* When you add options here, check that they do
461 not collide with OPTION_MD_BASE. See as.h. */
464 static const struct option std_longopts[] =
466 /* Note: commas are placed at the start of the line rather than
467 the end of the preceding line so that it is simpler to
468 selectively add and remove lines from this list. */
469 {"alternate", no_argument, NULL, OPTION_ALTERNATE}
470 /* The entry for "a" is here to prevent getopt_long_only() from
471 considering that -a is an abbreviation for --alternate. This is
472 necessary because -a=<FILE> is a valid switch but getopt would
473 normally reject it since --alternate does not take an argument. */
474 ,{"a", optional_argument, NULL, 'a'}
475 /* Handle -al=<FILE>. */
476 ,{"al", optional_argument, NULL, OPTION_AL}
477 ,{"compress-debug-sections", optional_argument, NULL, OPTION_COMPRESS_DEBUG}
478 ,{"nocompress-debug-sections", no_argument, NULL, OPTION_NOCOMPRESS_DEBUG}
479 ,{"debug-prefix-map", required_argument, NULL, OPTION_DEBUG_PREFIX_MAP}
480 ,{"defsym", required_argument, NULL, OPTION_DEFSYM}
481 ,{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG}
482 ,{"emulation", required_argument, NULL, OPTION_EMULATION}
483 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
484 ,{"execstack", no_argument, NULL, OPTION_EXECSTACK}
485 ,{"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK}
486 ,{"size-check", required_argument, NULL, OPTION_SIZE_CHECK}
487 ,{"sectname-subst", no_argument, NULL, OPTION_SECTNAME_SUBST}
489 ,{"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL}
490 ,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF2}
491 /* GCC uses --gdwarf-2 but GAS uses to use --gdwarf2,
492 so we keep it here for backwards compatibility. */
493 ,{"gdwarf2", no_argument, NULL, OPTION_GDWARF2}
494 ,{"gdwarf-sections", no_argument, NULL, OPTION_GDWARF_SECTIONS}
495 ,{"gen-debug", no_argument, NULL, 'g'}
496 ,{"gstabs", no_argument, NULL, OPTION_GSTABS}
497 ,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS}
498 ,{"hash-size", required_argument, NULL, OPTION_HASH_TABLE_SIZE}
499 ,{"help", no_argument, NULL, OPTION_HELP}
501 /* New option for extending instruction set (see also -t above).
502 The "-t file" or "--itbl file" option extends the basic set of
503 valid instructions by reading "file", a text file containing a
504 list of instruction formats. The additional opcodes and their
505 formats are added to the built-in set of instructions, and
506 mnemonics for new registers may also be defined. */
507 ,{"itbl", required_argument, NULL, 't'}
509 /* getopt allows abbreviations, so we do this to stop it from
510 treating -k as an abbreviation for --keep-locals. Some
511 ports use -k to enable PIC assembly. */
512 ,{"keep-locals", no_argument, NULL, 'L'}
513 ,{"keep-locals", no_argument, NULL, 'L'}
514 ,{"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH}
515 ,{"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2}
516 ,{"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH}
517 ,{"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES}
518 ,{"MD", required_argument, NULL, OPTION_DEPFILE}
519 ,{"mri", no_argument, NULL, 'M'}
520 ,{"nocpp", no_argument, NULL, OPTION_NOCPP}
521 ,{"no-warn", no_argument, NULL, 'W'}
522 ,{"reduce-memory-overheads", no_argument, NULL, OPTION_REDUCE_MEMORY_OVERHEADS}
523 ,{"statistics", no_argument, NULL, OPTION_STATISTICS}
524 ,{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE}
525 ,{"version", no_argument, NULL, OPTION_VERSION}
526 ,{"verbose", no_argument, NULL, OPTION_VERBOSE}
527 ,{"target-help", no_argument, NULL, OPTION_TARGET_HELP}
528 ,{"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT}
529 ,{"warn", no_argument, NULL, OPTION_WARN}
532 /* Construct the option lists from the standard list and the target
533 dependent list. Include space for an extra NULL option and
534 always NULL terminate. */
535 shortopts = concat (std_shortopts, md_shortopts, (char *) NULL);
536 longopts = (struct option *) xmalloc (sizeof (std_longopts)
537 + md_longopts_size + sizeof (struct option));
538 memcpy (longopts, std_longopts, sizeof (std_longopts));
539 memcpy (((char *) longopts) + sizeof (std_longopts), md_longopts, md_longopts_size);
540 memset (((char *) longopts) + sizeof (std_longopts) + md_longopts_size,
541 0, sizeof (struct option));
543 /* Make a local copy of the old argv. */
547 /* Initialize a new argv that contains no options. */
548 new_argv = (char **) xmalloc (sizeof (char *) * (old_argc + 1));
549 new_argv[0] = old_argv[0];
551 new_argv[new_argc] = NULL;
555 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
556 indicate a long option. */
558 int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts,
567 /* md_parse_option should return 1 if it recognizes optc,
569 if (md_parse_option (optc, optarg) != 0)
571 /* `-v' isn't included in the general short_opts list, so check for
572 it explicitly here before deciding we've gotten a bad argument. */
576 /* Telling getopt to treat -v's value as optional can result
577 in it picking up a following filename argument here. The
578 VMS code in md_parse_option can return 0 in that case,
579 but it has no way of pushing the filename argument back. */
580 if (optarg && *optarg)
581 new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL;
592 as_bad (_("unrecognized option -%c%s"), optc, optarg ? optarg : "");
598 case 1: /* File name. */
599 if (!strcmp (optarg, "-"))
601 new_argv[new_argc++] = optarg;
602 new_argv[new_argc] = NULL;
605 case OPTION_TARGET_HELP:
606 md_show_usage (stdout);
616 case OPTION_STATISTICS:
617 flag_print_statistics = 1;
620 case OPTION_STRIP_LOCAL_ABSOLUTE:
621 flag_strip_local_absolute = 1;
624 case OPTION_TRADITIONAL_FORMAT:
625 flag_traditional_format = 1;
629 /* This output is intended to follow the GNU standards document. */
630 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING);
631 printf (_("Copyright (C) 2015 Free Software Foundation, Inc.\n"));
633 This program is free software; you may redistribute it under the terms of\n\
634 the GNU General Public License version 3 or later.\n\
635 This program has absolutely no warranty.\n"));
636 printf (_("This assembler was configured for a target of `%s'.\n"),
640 case OPTION_EMULATION:
641 #ifdef USE_EMULATIONS
642 if (strcmp (optarg, this_emulation->name))
643 as_fatal (_("multiple emulation names specified"));
645 as_fatal (_("emulations not handled in this configuration"));
649 case OPTION_DUMPCONFIG:
650 fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS);
651 fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL);
652 fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU);
653 #ifdef TARGET_OBJ_FORMAT
654 fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT);
657 fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT);
661 case OPTION_COMPRESS_DEBUG:
664 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
665 if (strcasecmp (optarg, "none") == 0)
666 flag_compress_debug = COMPRESS_DEBUG_NONE;
667 else if (strcasecmp (optarg, "zlib") == 0)
668 flag_compress_debug = COMPRESS_DEBUG_ZLIB;
669 else if (strcasecmp (optarg, "zlib-gnu") == 0)
670 flag_compress_debug = COMPRESS_DEBUG_GNU_ZLIB;
671 else if (strcasecmp (optarg, "zlib-gabi") == 0)
672 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
674 as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
677 as_fatal (_("--compress-debug-sections=%s is unsupported"),
682 flag_compress_debug = COMPRESS_DEBUG;
685 case OPTION_NOCOMPRESS_DEBUG:
686 flag_compress_debug = COMPRESS_DEBUG_NONE;
689 case OPTION_DEBUG_PREFIX_MAP:
690 add_debug_prefix_map (optarg);
697 struct defsym_list *n;
699 for (s = optarg; *s != '\0' && *s != '='; s++)
702 as_fatal (_("bad defsym; format is --defsym name=value"));
704 i = bfd_scan_vma (s, (const char **) NULL, 0);
705 n = (struct defsym_list *) xmalloc (sizeof *n);
716 /* optarg is the name of the file containing the instruction
717 formats, opcodes, register names, etc. */
718 struct itbl_file_list *n;
722 as_warn (_("no file name following -t option"));
726 n = xmalloc (sizeof * n);
727 n->next = itbl_files;
731 /* Parse the file and add the new instructions to our internal
732 table. If multiple instruction tables are specified, the
733 information from this table gets appended onto the existing
735 itbl_files->name = xstrdup (optarg);
736 if (itbl_parse (itbl_files->name) != 0)
737 as_fatal (_("failed to read instruction table %s\n"),
744 start_dependencies (optarg);
748 /* Some backends, eg Alpha and Mips, use the -g switch for their
749 own purposes. So we check here for an explicit -g and allow
750 the backend to decide if it wants to process it. */
751 if ( old_argv[optind - 1][1] == 'g'
752 && md_parse_option (optc, optarg))
755 if (md_debug_format_selector)
756 debug_type = md_debug_format_selector (& use_gnu_debug_info_extensions);
758 debug_type = DEBUG_DWARF2;
760 debug_type = DEBUG_STABS;
763 case OPTION_GSTABS_PLUS:
764 use_gnu_debug_info_extensions = 1;
767 debug_type = DEBUG_STABS;
771 debug_type = DEBUG_DWARF2;
774 case OPTION_GDWARF_SECTIONS:
775 flag_dwarf_sections = TRUE;
779 flag_signed_overflow_ok = 1;
782 #ifndef WORKING_DOT_WORD
784 flag_warn_displacement = 1;
788 flag_keep_locals = 1;
791 case OPTION_LISTING_LHS_WIDTH:
792 listing_lhs_width = atoi (optarg);
793 if (listing_lhs_width_second < listing_lhs_width)
794 listing_lhs_width_second = listing_lhs_width;
796 case OPTION_LISTING_LHS_WIDTH2:
798 int tmp = atoi (optarg);
800 if (tmp > listing_lhs_width)
801 listing_lhs_width_second = tmp;
804 case OPTION_LISTING_RHS_WIDTH:
805 listing_rhs_width = atoi (optarg);
807 case OPTION_LISTING_CONT_LINES:
808 listing_lhs_cont_lines = atoi (optarg);
819 flag_readonly_data_in_text = 1;
823 flag_no_warnings = 1;
827 flag_no_warnings = 0;
828 flag_fatal_warnings = 0;
831 case OPTION_WARN_FATAL:
832 flag_no_warnings = 0;
833 flag_fatal_warnings = 1;
836 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
837 case OPTION_EXECSTACK:
839 flag_noexecstack = 0;
842 case OPTION_NOEXECSTACK:
843 flag_noexecstack = 1;
847 case OPTION_SIZE_CHECK:
848 if (strcasecmp (optarg, "error") == 0)
849 flag_size_check = size_check_error;
850 else if (strcasecmp (optarg, "warning") == 0)
851 flag_size_check = size_check_warning;
853 as_fatal (_("Invalid --size-check= option: `%s'"), optarg);
856 case OPTION_SECTNAME_SUBST:
857 flag_sectname_subst = 1;
861 flag_always_generate_output = 1;
865 listing |= LISTING_LISTING;
867 listing_filename = xstrdup (optarg);
870 case OPTION_ALTERNATE:
871 optarg = old_argv [optind - 1];
872 while (* optarg == '-')
875 if (strcmp (optarg, "alternate") == 0)
877 flag_macro_alternate = 1;
886 if (optarg != old_argv[optind] && optarg[-1] == '=')
889 if (md_parse_option (optc, optarg) != 0)
897 listing |= LISTING_NOCOND;
900 listing |= LISTING_NODEBUG;
903 listing |= LISTING_GENERAL;
906 listing |= LISTING_HLL;
909 listing |= LISTING_LISTING;
912 listing |= LISTING_MACEXP;
915 listing |= LISTING_NOFORM;
918 listing |= LISTING_SYMBOLS;
921 listing_filename = xstrdup (optarg + 1);
922 optarg += strlen (listing_filename);
925 as_fatal (_("invalid listing option `%c'"), *optarg);
932 listing = LISTING_DEFAULT;
936 /* DEBUG is implemented: it debugs different
937 things from other people's assemblers. */
942 flag_no_comments = 1;
946 { /* Include file directory. */
947 char *temp = xstrdup (optarg);
949 add_include_dir (temp);
954 out_file_name = xstrdup (optarg);
961 /* -X means treat warnings as errors. */
964 case OPTION_REDUCE_MEMORY_OVERHEADS:
965 /* The only change we make at the moment is to reduce
966 the size of the hash tables that we use. */
967 set_gas_hash_table_size (4051);
970 case OPTION_HASH_TABLE_SIZE:
972 unsigned long new_size;
974 new_size = strtoul (optarg, NULL, 0);
976 set_gas_hash_table_size (new_size);
978 as_fatal (_("--hash-size needs a numeric argument"));
990 #ifdef md_after_parse_args
991 md_after_parse_args ();
996 dump_statistics (void)
999 char *lim = (char *) sbrk (0);
1001 long run_time = get_run_time () - start_time;
1003 fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"),
1004 myname, run_time / 1000000, run_time % 1000000);
1006 fprintf (stderr, _("%s: data size %ld\n"),
1007 myname, (long) (lim - start_sbrk));
1010 subsegs_print_statistics (stderr);
1011 write_print_statistics (stderr);
1012 symbol_print_statistics (stderr);
1013 read_print_statistics (stderr);
1015 #ifdef tc_print_statistics
1016 tc_print_statistics (stderr);
1019 #ifdef obj_print_statistics
1020 obj_print_statistics (stderr);
1025 close_output_file (void)
1027 output_file_close (out_file_name);
1029 unlink_if_ordinary (out_file_name);
1032 /* The interface between the macro code and gas expression handling. */
1035 macro_expr (const char *emsg, size_t idx, sb *in, offsetT *val)
1042 hold = input_line_pointer;
1043 input_line_pointer = in->ptr + idx;
1044 expression_and_evaluate (&ex);
1045 idx = input_line_pointer - in->ptr;
1046 input_line_pointer = hold;
1048 if (ex.X_op != O_constant)
1049 as_bad ("%s", emsg);
1051 *val = ex.X_add_number;
1056 /* Here to attempt 1 pass over each input file.
1057 We scan argv[*] looking for filenames or exactly "" which is
1058 shorthand for stdin. Any argv that is NULL is not a file-name.
1059 We set need_pass_2 TRUE if, after this, we still have unresolved
1060 expressions of the form (unknown value)+-(unknown value).
1062 Note the un*x semantics: there is only 1 logical input file, but it
1063 may be a catenation of many 'physical' input files. */
1066 perform_an_assembly_pass (int argc, char ** argv)
1070 flagword applicable;
1076 /* Create the standard sections, and those the assembler uses
1078 text_section = subseg_new (TEXT_SECTION_NAME, 0);
1079 data_section = subseg_new (DATA_SECTION_NAME, 0);
1080 bss_section = subseg_new (BSS_SECTION_NAME, 0);
1081 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1082 to have relocs, otherwise we don't find out in time. */
1083 applicable = bfd_applicable_section_flags (stdoutput);
1084 bfd_set_section_flags (stdoutput, text_section,
1085 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1086 | SEC_CODE | SEC_READONLY));
1087 bfd_set_section_flags (stdoutput, data_section,
1088 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1090 bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC);
1091 seg_info (bss_section)->bss = 1;
1093 subseg_new (BFD_ABS_SECTION_NAME, 0);
1094 subseg_new (BFD_UND_SECTION_NAME, 0);
1095 reg_section = subseg_new ("*GAS `reg' section*", 0);
1096 expr_section = subseg_new ("*GAS `expr' section*", 0);
1099 subseg_set (text_section, 0);
1102 /* This may add symbol table entries, which requires having an open BFD,
1103 and sections already created. */
1120 { /* Is it a file-name argument? */
1123 /* argv->"" if stdin desired, else->filename. */
1124 read_a_source_file (*argv);
1126 argv++; /* Completed that argv. */
1129 read_a_source_file ("");
1134 main (int argc, char ** argv)
1136 char ** argv_orig = argv;
1140 start_time = get_run_time ();
1142 start_sbrk = (char *) sbrk (0);
1145 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
1146 setlocale (LC_MESSAGES, "");
1148 #if defined (HAVE_SETLOCALE)
1149 setlocale (LC_CTYPE, "");
1151 bindtextdomain (PACKAGE, LOCALEDIR);
1152 textdomain (PACKAGE);
1157 #ifdef HOST_SPECIAL_INIT
1158 HOST_SPECIAL_INIT (argc, argv);
1162 xmalloc_set_program_name (myname);
1164 expandargv (&argc, &argv);
1166 START_PROGRESS (myname, 0);
1168 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1169 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1172 out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
1176 bfd_set_error_program_name (myname);
1178 #ifdef USE_EMULATIONS
1179 select_emulation_mode (argc, argv);
1183 /* Call parse_args before any of the init/begin functions
1184 so that switches like --hash-size can be honored. */
1185 parse_args (&argc, &argv);
1190 input_scrub_begin ();
1193 /* It has to be called after dump_statistics (). */
1194 xatexit (close_output_file);
1196 if (flag_print_statistics)
1197 xatexit (dump_statistics);
1201 macro_strip_at = flag_mri;
1204 macro_init (flag_macro_alternate, flag_mri, macro_strip_at, macro_expr);
1208 output_file_create (out_file_name);
1209 gas_assert (stdoutput != 0);
1213 #ifdef tc_init_after_args
1214 tc_init_after_args ();
1221 local_symbol_make (".gasversion.", absolute_section,
1222 BFD_VERSION / 10000UL, &predefined_address_frag);
1224 /* Now that we have fully initialized, and have created the output
1225 file, define any symbols requested by --defsym command line
1227 while (defsyms != NULL)
1230 struct defsym_list *next;
1232 sym = symbol_new (defsyms->name, absolute_section, defsyms->value,
1233 &zero_address_frag);
1234 /* Make symbols defined on the command line volatile, so that they
1235 can be redefined inside a source file. This makes this assembler's
1236 behaviour compatible with earlier versions, but it may not be
1237 completely intuitive. */
1238 S_SET_VOLATILE (sym);
1239 symbol_table_insert (sym);
1240 next = defsyms->next;
1248 perform_an_assembly_pass (argc, argv);
1250 cond_finish_check (-1);
1256 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1257 if ((flag_execstack || flag_noexecstack)
1258 && OUTPUT_FLAVOR == bfd_target_elf_flavour)
1262 gnustack = subseg_new (".note.GNU-stack", 0);
1263 bfd_set_section_flags (stdoutput, gnustack,
1264 SEC_READONLY | (flag_execstack ? SEC_CODE : 0));
1269 /* If we've been collecting dwarf2 .debug_line info, either for
1270 assembly debugging or on behalf of the compiler, emit it now. */
1273 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1274 directives from the user or by the backend, emit it now. */
1278 if (seen_at_least_1_file ())
1280 int n_warns, n_errs;
1284 write_object_file ();
1286 n_warns = had_warnings ();
1287 n_errs = had_errors ();
1290 sprintf (warn_msg, _("%d warning"), n_warns);
1292 sprintf (warn_msg, _("%d warnings"), n_warns);
1294 sprintf (err_msg, _("%d error"), n_errs);
1296 sprintf (err_msg, _("%d errors"), n_errs);
1298 if (flag_fatal_warnings && n_warns != 0)
1301 as_bad (_("%s, treating warnings as errors"), warn_msg);
1307 else if (flag_always_generate_output)
1309 /* The -Z flag indicates that an object file should be generated,
1310 regardless of warnings and errors. */
1312 fprintf (stderr, _("%s, %s, generating bad object file\n"),
1320 listing_print (listing_filename, argv_orig);
1325 END_PROGRESS (myname);
1327 /* Use xexit instead of return, because under VMS environments they
1328 may not place the same interpretation on the value given. */
1329 if (had_errors () != 0)
1330 xexit (EXIT_FAILURE);
1332 /* Only generate dependency file if assembler was successful. */
1333 print_dependencies ();
1335 xexit (EXIT_SUCCESS);