1 /* as.c - GAS main program.
2 Copyright (C) 1987-2018 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. */
34 /* Disable code to set FAKE_LABEL_NAME in obj-multi.h, to avoid circular
36 #define INITIALIZING_EMULS
40 #include "output-file.h"
43 #include "dwarf2dbg.h"
44 #include "dw2gencfi.h"
55 /* Perform any cgen specific initialisation for gas. */
56 extern void gas_cgen_begin (void);
59 /* We build a list of defsyms as we read the options, and then define
60 them after we have initialized everything. */
63 struct defsym_list *next;
69 /* True if a listing is wanted. */
72 /* Type of debugging to generate. */
73 enum debug_info_type debug_type = DEBUG_UNSPECIFIED;
74 int use_gnu_debug_info_extensions = 0;
76 #ifndef MD_DEBUG_FORMAT_SELECTOR
77 #define MD_DEBUG_FORMAT_SELECTOR NULL
79 static enum debug_info_type (*md_debug_format_selector) (int *) = MD_DEBUG_FORMAT_SELECTOR;
81 /* Maximum level of macro nesting. */
82 int max_macro_nest = 100;
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. */
91 /* To monitor memory allocation more effectively, make this non-zero.
92 Then the chunk sizes for gas and bfd will be reduced. */
95 /* Enable verbose mode. */
98 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
99 int flag_use_elf_stt_common = DEFAULT_GENERATE_ELF_STT_COMMON;
102 /* Keep the output file. */
103 static int keep_it = 0;
111 /* Name of listing file. */
112 static char *listing_filename = NULL;
114 static struct defsym_list *defsyms;
117 /* Keep a record of the itbl files we read in. */
118 struct itbl_file_list
120 struct itbl_file_list *next;
123 static struct itbl_file_list *itbl_files;
126 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)
146 const char *em = NULL;
148 for (i = 1; i < argc; i++)
149 if (!strncmp ("--em", argv[i], 4))
155 p = strchr (argv[i], '=');
162 as_fatal (_("missing emulation mode name"));
167 em = getenv (EMULATION_ENVIRON);
169 em = DEFAULT_EMULATION;
173 for (i = 0; i < n_emulations; i++)
174 if (!strcmp (emulations[i]->name, em))
176 if (i == n_emulations)
177 as_fatal (_("unrecognized emulation name `%s'"), em);
178 this_emulation = emulations[i];
181 this_emulation = emulations[0];
183 this_emulation->init ();
187 default_emul_bfd_name (void)
194 common_emul_init (void)
196 this_format = this_emulation->format;
198 if (this_emulation->leading_underscore == 2)
199 this_emulation->leading_underscore = this_format->dfl_leading_underscore;
201 if (this_emulation->default_endian != 2)
202 target_big_endian = this_emulation->default_endian;
204 if (this_emulation->fake_label_name == 0)
206 if (this_emulation->leading_underscore)
207 this_emulation->fake_label_name = FAKE_LABEL_NAME;
209 /* What other parameters should we test? */
210 this_emulation->fake_label_name = "." FAKE_LABEL_NAME;
216 print_version_id (void)
224 fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s\n"),
225 VERSION, TARGET_ALIAS, BFD_VERSION_STRING);
228 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
229 enum compressed_debug_section_type flag_compress_debug
230 = COMPRESS_DEBUG_GABI_ZLIB;
234 show_usage (FILE * stream)
236 fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname);
238 fprintf (stream, _("\
240 -a[sub-option...] turn on listings\n\
241 Sub-options [default hls]:\n\
242 c omit false conditionals\n\
243 d omit debugging directives\n\
244 g include general info\n\
245 h include high-level source\n\
246 l include assembly\n\
247 m include macro expansions\n\
248 n omit forms processing\n\
250 =FILE list to FILE (must be last sub-option)\n"));
252 fprintf (stream, _("\
253 --alternate initially turn on alternate macro syntax\n"));
254 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
255 fprintf (stream, _("\
256 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
257 compress DWARF debug sections using zlib [default]\n"));
258 fprintf (stream, _("\
259 --nocompress-debug-sections\n\
260 don't compress DWARF debug sections\n"));
262 fprintf (stream, _("\
263 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
264 compress DWARF debug sections using zlib\n"));
265 fprintf (stream, _("\
266 --nocompress-debug-sections\n\
267 don't compress DWARF debug sections [default]\n"));
269 fprintf (stream, _("\
270 -D produce assembler debugging messages\n"));
271 fprintf (stream, _("\
272 --debug-prefix-map OLD=NEW\n\
273 map OLD to NEW in debug information\n"));
274 fprintf (stream, _("\
275 --defsym SYM=VAL define symbol SYM to given value\n"));
276 #ifdef USE_EMULATIONS
283 for (i = 0; i < n_emulations - 1; i++)
284 fprintf (stream, "%s | ", emulations[i]->name);
285 fprintf (stream, "%s]\n", emulations[i]->name);
287 def_em = getenv (EMULATION_ENVIRON);
289 def_em = DEFAULT_EMULATION;
290 fprintf (stream, _("\
291 emulate output (default %s)\n"), def_em);
294 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
295 fprintf (stream, _("\
296 --execstack require executable stack for this object\n"));
297 fprintf (stream, _("\
298 --noexecstack don't require executable stack for this object\n"));
299 fprintf (stream, _("\
300 --size-check=[error|warning]\n\
301 ELF .size directive check (default --size-check=error)\n"));
302 fprintf (stream, _("\
303 --elf-stt-common=[no|yes]\n\
304 generate ELF common symbols with STT_COMMON type\n"));
305 fprintf (stream, _("\
306 --sectname-subst enable section name substitution sequences\n"));
308 fprintf (stream, _("\
309 -f skip whitespace and comment preprocessing\n"));
310 fprintf (stream, _("\
311 -g --gen-debug generate debugging information\n"));
312 fprintf (stream, _("\
313 --gstabs generate STABS debugging information\n"));
314 fprintf (stream, _("\
315 --gstabs+ generate STABS debug info with GNU extensions\n"));
316 fprintf (stream, _("\
317 --gdwarf-2 generate DWARF2 debugging information\n"));
318 fprintf (stream, _("\
319 --gdwarf-sections generate per-function section names for DWARF line information\n"));
320 fprintf (stream, _("\
321 --hash-size=<value> set the hash table size close to <value>\n"));
322 fprintf (stream, _("\
323 --help show this message and exit\n"));
324 fprintf (stream, _("\
325 --target-help show target specific options\n"));
326 fprintf (stream, _("\
327 -I DIR add DIR to search list for .include directives\n"));
328 fprintf (stream, _("\
329 -J don't warn about signed overflow\n"));
330 fprintf (stream, _("\
331 -K warn when differences altered for long displacements\n"));
332 fprintf (stream, _("\
333 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
334 fprintf (stream, _("\
335 -M,--mri assemble in MRI compatibility mode\n"));
336 fprintf (stream, _("\
337 --MD FILE write dependency information in FILE (default none)\n"));
338 fprintf (stream, _("\
340 fprintf (stream, _("\
341 -no-pad-sections do not pad the end of sections to alignment boundaries\n"));
342 fprintf (stream, _("\
343 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
344 fprintf (stream, _("\
345 -R fold data section into text section\n"));
346 fprintf (stream, _("\
347 --reduce-memory-overheads \n\
348 prefer smaller memory use at the cost of longer\n\
350 fprintf (stream, _("\
351 --statistics print various measured statistics from execution\n"));
352 fprintf (stream, _("\
353 --strip-local-absolute strip local absolute symbols\n"));
354 fprintf (stream, _("\
355 --traditional-format Use same format as native assembler when possible\n"));
356 fprintf (stream, _("\
357 --version print assembler version number and exit\n"));
358 fprintf (stream, _("\
359 -W --no-warn suppress warnings\n"));
360 fprintf (stream, _("\
361 --warn don't suppress warnings\n"));
362 fprintf (stream, _("\
363 --fatal-warnings treat warnings as errors\n"));
365 fprintf (stream, _("\
366 --itbl INSTTBL extend instruction set to include instructions\n\
367 matching the specifications defined in file INSTTBL\n"));
369 fprintf (stream, _("\
371 fprintf (stream, _("\
373 fprintf (stream, _("\
374 -Z generate object file even after errors\n"));
375 fprintf (stream, _("\
376 --listing-lhs-width set the width in words of the output data column of\n\
378 fprintf (stream, _("\
379 --listing-lhs-width2 set the width in words of the continuation lines\n\
380 of the output data column; ignored if smaller than\n\
381 the width of the first line\n"));
382 fprintf (stream, _("\
383 --listing-rhs-width set the max width in characters of the lines from\n\
384 the source file\n"));
385 fprintf (stream, _("\
386 --listing-cont-lines set the maximum number of continuation lines used\n\
387 for the output data column of the listing\n"));
388 fprintf (stream, _("\
389 @FILE read options from FILE\n"));
391 md_show_usage (stream);
393 fputc ('\n', stream);
395 if (REPORT_BUGS_TO[0] && stream == stdout)
396 fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
399 /* Since it is easy to do here we interpret the special arg "-"
400 to mean "use stdin" and we set that argv[] pointing to "".
401 After we have munged argv[], the only things left are source file
402 name(s) and ""(s) denoting stdin. These file names are used
403 (perhaps more than once) later.
405 check for new machine-dep cmdline options in
406 md_parse_option definitions in config/tc-*.c. */
409 parse_args (int * pargc, char *** pargv)
415 /* Starting the short option string with '-' is for programs that
416 expect options and other ARGV-elements in any order and that care about
417 the ordering of the two. We describe each non-option ARGV-element
418 as if it were the argument of an option with character code 1. */
420 extern const char *md_shortopts;
421 static const char std_shortopts[] =
424 #ifndef WORKING_DOT_WORD
425 /* -K is not meaningful if .word is not being hacked. */
428 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
430 /* -v takes an argument on VMS, so we don't make it a generic
436 /* New option for extending instruction set (see also --itbl below). */
441 struct option *longopts;
442 extern struct option md_longopts[];
443 extern size_t md_longopts_size;
444 /* Codes used for the long options with no short synonyms. */
447 OPTION_HELP = OPTION_STD_BASE,
454 OPTION_DEBUG_PREFIX_MAP,
456 OPTION_LISTING_LHS_WIDTH,
457 OPTION_LISTING_LHS_WIDTH2,
458 OPTION_LISTING_RHS_WIDTH,
459 OPTION_LISTING_CONT_LINES,
464 OPTION_GDWARF_SECTIONS,
465 OPTION_STRIP_LOCAL_ABSOLUTE,
466 OPTION_TRADITIONAL_FORMAT,
472 OPTION_ELF_STT_COMMON,
473 OPTION_SECTNAME_SUBST,
476 OPTION_HASH_TABLE_SIZE,
477 OPTION_REDUCE_MEMORY_OVERHEADS,
479 OPTION_COMPRESS_DEBUG,
480 OPTION_NOCOMPRESS_DEBUG,
481 OPTION_NO_PAD_SECTIONS /* = STD_BASE + 40 */
482 /* When you add options here, check that they do
483 not collide with OPTION_MD_BASE. See as.h. */
486 static const struct option std_longopts[] =
488 /* Note: commas are placed at the start of the line rather than
489 the end of the preceding line so that it is simpler to
490 selectively add and remove lines from this list. */
491 {"alternate", no_argument, NULL, OPTION_ALTERNATE}
492 /* The entry for "a" is here to prevent getopt_long_only() from
493 considering that -a is an abbreviation for --alternate. This is
494 necessary because -a=<FILE> is a valid switch but getopt would
495 normally reject it since --alternate does not take an argument. */
496 ,{"a", optional_argument, NULL, 'a'}
497 /* Handle -al=<FILE>. */
498 ,{"al", optional_argument, NULL, OPTION_AL}
499 ,{"compress-debug-sections", optional_argument, NULL, OPTION_COMPRESS_DEBUG}
500 ,{"nocompress-debug-sections", no_argument, NULL, OPTION_NOCOMPRESS_DEBUG}
501 ,{"debug-prefix-map", required_argument, NULL, OPTION_DEBUG_PREFIX_MAP}
502 ,{"defsym", required_argument, NULL, OPTION_DEFSYM}
503 ,{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG}
504 ,{"emulation", required_argument, NULL, OPTION_EMULATION}
505 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
506 ,{"execstack", no_argument, NULL, OPTION_EXECSTACK}
507 ,{"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK}
508 ,{"size-check", required_argument, NULL, OPTION_SIZE_CHECK}
509 ,{"elf-stt-common", required_argument, NULL, OPTION_ELF_STT_COMMON}
510 ,{"sectname-subst", no_argument, NULL, OPTION_SECTNAME_SUBST}
512 ,{"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL}
513 ,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF2}
514 /* GCC uses --gdwarf-2 but GAS uses to use --gdwarf2,
515 so we keep it here for backwards compatibility. */
516 ,{"gdwarf2", no_argument, NULL, OPTION_GDWARF2}
517 ,{"gdwarf-sections", no_argument, NULL, OPTION_GDWARF_SECTIONS}
518 ,{"gen-debug", no_argument, NULL, 'g'}
519 ,{"gstabs", no_argument, NULL, OPTION_GSTABS}
520 ,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS}
521 ,{"hash-size", required_argument, NULL, OPTION_HASH_TABLE_SIZE}
522 ,{"help", no_argument, NULL, OPTION_HELP}
524 /* New option for extending instruction set (see also -t above).
525 The "-t file" or "--itbl file" option extends the basic set of
526 valid instructions by reading "file", a text file containing a
527 list of instruction formats. The additional opcodes and their
528 formats are added to the built-in set of instructions, and
529 mnemonics for new registers may also be defined. */
530 ,{"itbl", required_argument, NULL, 't'}
532 /* getopt allows abbreviations, so we do this to stop it from
533 treating -k as an abbreviation for --keep-locals. Some
534 ports use -k to enable PIC assembly. */
535 ,{"keep-locals", no_argument, NULL, 'L'}
536 ,{"keep-locals", no_argument, NULL, 'L'}
537 ,{"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH}
538 ,{"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2}
539 ,{"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH}
540 ,{"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES}
541 ,{"MD", required_argument, NULL, OPTION_DEPFILE}
542 ,{"mri", no_argument, NULL, 'M'}
543 ,{"nocpp", no_argument, NULL, OPTION_NOCPP}
544 ,{"no-pad-sections", no_argument, NULL, OPTION_NO_PAD_SECTIONS}
545 ,{"no-warn", no_argument, NULL, 'W'}
546 ,{"reduce-memory-overheads", no_argument, NULL, OPTION_REDUCE_MEMORY_OVERHEADS}
547 ,{"statistics", no_argument, NULL, OPTION_STATISTICS}
548 ,{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE}
549 ,{"version", no_argument, NULL, OPTION_VERSION}
550 ,{"verbose", no_argument, NULL, OPTION_VERBOSE}
551 ,{"target-help", no_argument, NULL, OPTION_TARGET_HELP}
552 ,{"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT}
553 ,{"warn", no_argument, NULL, OPTION_WARN}
556 /* Construct the option lists from the standard list and the target
557 dependent list. Include space for an extra NULL option and
558 always NULL terminate. */
559 shortopts = concat (std_shortopts, md_shortopts, (char *) NULL);
560 longopts = (struct option *) xmalloc (sizeof (std_longopts)
561 + md_longopts_size + sizeof (struct option));
562 memcpy (longopts, std_longopts, sizeof (std_longopts));
563 memcpy (((char *) longopts) + sizeof (std_longopts), md_longopts, md_longopts_size);
564 memset (((char *) longopts) + sizeof (std_longopts) + md_longopts_size,
565 0, sizeof (struct option));
567 /* Make a local copy of the old argv. */
571 /* Initialize a new argv that contains no options. */
572 new_argv = XNEWVEC (char *, old_argc + 1);
573 new_argv[0] = old_argv[0];
575 new_argv[new_argc] = NULL;
579 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
580 indicate a long option. */
582 int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts,
591 /* md_parse_option should return 1 if it recognizes optc,
593 if (md_parse_option (optc, optarg) != 0)
595 /* `-v' isn't included in the general short_opts list, so check for
596 it explicitly here before deciding we've gotten a bad argument. */
600 /* Telling getopt to treat -v's value as optional can result
601 in it picking up a following filename argument here. The
602 VMS code in md_parse_option can return 0 in that case,
603 but it has no way of pushing the filename argument back. */
604 if (optarg && *optarg)
605 new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL;
616 as_bad (_("unrecognized option -%c%s"), optc, optarg ? optarg : "");
622 case 1: /* File name. */
623 if (!strcmp (optarg, "-"))
624 optarg = (char *) "";
625 new_argv[new_argc++] = optarg;
626 new_argv[new_argc] = NULL;
629 case OPTION_TARGET_HELP:
630 md_show_usage (stdout);
640 case OPTION_NO_PAD_SECTIONS:
641 do_not_pad_sections_to_alignment = 1;
644 case OPTION_STATISTICS:
645 flag_print_statistics = 1;
648 case OPTION_STRIP_LOCAL_ABSOLUTE:
649 flag_strip_local_absolute = 1;
652 case OPTION_TRADITIONAL_FORMAT:
653 flag_traditional_format = 1;
657 /* This output is intended to follow the GNU standards document. */
658 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING);
659 printf (_("Copyright (C) 2018 Free Software Foundation, Inc.\n"));
661 This program is free software; you may redistribute it under the terms of\n\
662 the GNU General Public License version 3 or later.\n\
663 This program has absolutely no warranty.\n"));
664 #ifdef TARGET_WITH_CPU
665 printf (_("This assembler was configured for a target of `%s' "
666 "and default,\ncpu type `%s'.\n"),
667 TARGET_ALIAS, TARGET_WITH_CPU);
669 printf (_("This assembler was configured for a target of `%s'.\n"),
674 case OPTION_EMULATION:
675 #ifdef USE_EMULATIONS
676 if (strcmp (optarg, this_emulation->name))
677 as_fatal (_("multiple emulation names specified"));
679 as_fatal (_("emulations not handled in this configuration"));
683 case OPTION_DUMPCONFIG:
684 fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS);
685 fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL);
686 fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU);
687 #ifdef TARGET_OBJ_FORMAT
688 fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT);
691 fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT);
695 case OPTION_COMPRESS_DEBUG:
698 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
699 if (strcasecmp (optarg, "none") == 0)
700 flag_compress_debug = COMPRESS_DEBUG_NONE;
701 else if (strcasecmp (optarg, "zlib") == 0)
702 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
703 else if (strcasecmp (optarg, "zlib-gnu") == 0)
704 flag_compress_debug = COMPRESS_DEBUG_GNU_ZLIB;
705 else if (strcasecmp (optarg, "zlib-gabi") == 0)
706 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
708 as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
711 as_fatal (_("--compress-debug-sections=%s is unsupported"),
716 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
719 case OPTION_NOCOMPRESS_DEBUG:
720 flag_compress_debug = COMPRESS_DEBUG_NONE;
723 case OPTION_DEBUG_PREFIX_MAP:
724 add_debug_prefix_map (optarg);
731 struct defsym_list *n;
733 for (s = optarg; *s != '\0' && *s != '='; s++)
736 as_fatal (_("bad defsym; format is --defsym name=value"));
738 i = bfd_scan_vma (s, (const char **) NULL, 0);
739 n = XNEW (struct defsym_list);
750 /* optarg is the name of the file containing the instruction
751 formats, opcodes, register names, etc. */
752 struct itbl_file_list *n;
756 as_warn (_("no file name following -t option"));
760 n = XNEW (struct itbl_file_list);
761 n->next = itbl_files;
765 /* Parse the file and add the new instructions to our internal
766 table. If multiple instruction tables are specified, the
767 information from this table gets appended onto the existing
769 itbl_files->name = xstrdup (optarg);
770 if (itbl_parse (itbl_files->name) != 0)
771 as_fatal (_("failed to read instruction table %s\n"),
778 start_dependencies (optarg);
782 /* Some backends, eg Alpha and Mips, use the -g switch for their
783 own purposes. So we check here for an explicit -g and allow
784 the backend to decide if it wants to process it. */
785 if ( old_argv[optind - 1][1] == 'g'
786 && md_parse_option (optc, optarg))
789 if (md_debug_format_selector)
790 debug_type = md_debug_format_selector (& use_gnu_debug_info_extensions);
792 debug_type = DEBUG_DWARF2;
794 debug_type = DEBUG_STABS;
797 case OPTION_GSTABS_PLUS:
798 use_gnu_debug_info_extensions = 1;
801 debug_type = DEBUG_STABS;
805 debug_type = DEBUG_DWARF2;
808 case OPTION_GDWARF_SECTIONS:
809 flag_dwarf_sections = TRUE;
813 flag_signed_overflow_ok = 1;
816 #ifndef WORKING_DOT_WORD
818 flag_warn_displacement = 1;
822 flag_keep_locals = 1;
825 case OPTION_LISTING_LHS_WIDTH:
826 listing_lhs_width = atoi (optarg);
827 if (listing_lhs_width_second < listing_lhs_width)
828 listing_lhs_width_second = listing_lhs_width;
830 case OPTION_LISTING_LHS_WIDTH2:
832 int tmp = atoi (optarg);
834 if (tmp > listing_lhs_width)
835 listing_lhs_width_second = tmp;
838 case OPTION_LISTING_RHS_WIDTH:
839 listing_rhs_width = atoi (optarg);
841 case OPTION_LISTING_CONT_LINES:
842 listing_lhs_cont_lines = atoi (optarg);
853 flag_readonly_data_in_text = 1;
857 flag_no_warnings = 1;
861 flag_no_warnings = 0;
862 flag_fatal_warnings = 0;
865 case OPTION_WARN_FATAL:
866 flag_no_warnings = 0;
867 flag_fatal_warnings = 1;
870 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
871 case OPTION_EXECSTACK:
873 flag_noexecstack = 0;
876 case OPTION_NOEXECSTACK:
877 flag_noexecstack = 1;
881 case OPTION_SIZE_CHECK:
882 if (strcasecmp (optarg, "error") == 0)
883 flag_allow_nonconst_size = FALSE;
884 else if (strcasecmp (optarg, "warning") == 0)
885 flag_allow_nonconst_size = TRUE;
887 as_fatal (_("Invalid --size-check= option: `%s'"), optarg);
890 case OPTION_ELF_STT_COMMON:
891 if (strcasecmp (optarg, "no") == 0)
892 flag_use_elf_stt_common = 0;
893 else if (strcasecmp (optarg, "yes") == 0)
894 flag_use_elf_stt_common = 1;
896 as_fatal (_("Invalid --elf-stt-common= option: `%s'"),
900 case OPTION_SECTNAME_SUBST:
901 flag_sectname_subst = 1;
905 flag_always_generate_output = 1;
909 listing |= LISTING_LISTING;
911 listing_filename = xstrdup (optarg);
914 case OPTION_ALTERNATE:
915 optarg = old_argv [optind - 1];
916 while (* optarg == '-')
919 if (strcmp (optarg, "alternate") == 0)
921 flag_macro_alternate = 1;
930 if (optarg != old_argv[optind] && optarg[-1] == '=')
933 if (md_parse_option (optc, optarg) != 0)
941 listing |= LISTING_NOCOND;
944 listing |= LISTING_NODEBUG;
947 listing |= LISTING_GENERAL;
950 listing |= LISTING_HLL;
953 listing |= LISTING_LISTING;
956 listing |= LISTING_MACEXP;
959 listing |= LISTING_NOFORM;
962 listing |= LISTING_SYMBOLS;
965 listing_filename = xstrdup (optarg + 1);
966 optarg += strlen (listing_filename);
969 as_fatal (_("invalid listing option `%c'"), *optarg);
976 listing = LISTING_DEFAULT;
980 /* DEBUG is implemented: it debugs different
981 things from other people's assemblers. */
986 flag_no_comments = 1;
990 { /* Include file directory. */
991 char *temp = xstrdup (optarg);
993 add_include_dir (temp);
998 out_file_name = xstrdup (optarg);
1005 /* -X means treat warnings as errors. */
1008 case OPTION_REDUCE_MEMORY_OVERHEADS:
1009 /* The only change we make at the moment is to reduce
1010 the size of the hash tables that we use. */
1011 set_gas_hash_table_size (4051);
1014 case OPTION_HASH_TABLE_SIZE:
1016 unsigned long new_size;
1018 new_size = strtoul (optarg, NULL, 0);
1020 set_gas_hash_table_size (new_size);
1022 as_fatal (_("--hash-size needs a numeric argument"));
1034 #ifdef md_after_parse_args
1035 md_after_parse_args ();
1040 dump_statistics (void)
1042 long run_time = get_run_time () - start_time;
1044 fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"),
1045 myname, run_time / 1000000, run_time % 1000000);
1047 subsegs_print_statistics (stderr);
1048 write_print_statistics (stderr);
1049 symbol_print_statistics (stderr);
1050 read_print_statistics (stderr);
1052 #ifdef tc_print_statistics
1053 tc_print_statistics (stderr);
1056 #ifdef obj_print_statistics
1057 obj_print_statistics (stderr);
1062 close_output_file (void)
1064 output_file_close (out_file_name);
1066 unlink_if_ordinary (out_file_name);
1069 /* The interface between the macro code and gas expression handling. */
1072 macro_expr (const char *emsg, size_t idx, sb *in, offsetT *val)
1079 hold = input_line_pointer;
1080 input_line_pointer = in->ptr + idx;
1081 expression_and_evaluate (&ex);
1082 idx = input_line_pointer - in->ptr;
1083 input_line_pointer = hold;
1085 if (ex.X_op != O_constant)
1086 as_bad ("%s", emsg);
1088 *val = ex.X_add_number;
1093 /* Here to attempt 1 pass over each input file.
1094 We scan argv[*] looking for filenames or exactly "" which is
1095 shorthand for stdin. Any argv that is NULL is not a file-name.
1096 We set need_pass_2 TRUE if, after this, we still have unresolved
1097 expressions of the form (unknown value)+-(unknown value).
1099 Note the un*x semantics: there is only 1 logical input file, but it
1100 may be a catenation of many 'physical' input files. */
1103 perform_an_assembly_pass (int argc, char ** argv)
1107 flagword applicable;
1113 /* Create the standard sections, and those the assembler uses
1115 text_section = subseg_new (TEXT_SECTION_NAME, 0);
1116 data_section = subseg_new (DATA_SECTION_NAME, 0);
1117 bss_section = subseg_new (BSS_SECTION_NAME, 0);
1118 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1119 to have relocs, otherwise we don't find out in time. */
1120 applicable = bfd_applicable_section_flags (stdoutput);
1121 bfd_set_section_flags (stdoutput, text_section,
1122 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1123 | SEC_CODE | SEC_READONLY));
1124 bfd_set_section_flags (stdoutput, data_section,
1125 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1127 bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC);
1128 seg_info (bss_section)->bss = 1;
1130 subseg_new (BFD_ABS_SECTION_NAME, 0);
1131 subseg_new (BFD_UND_SECTION_NAME, 0);
1132 reg_section = subseg_new ("*GAS `reg' section*", 0);
1133 expr_section = subseg_new ("*GAS `expr' section*", 0);
1136 subseg_set (text_section, 0);
1139 /* This may add symbol table entries, which requires having an open BFD,
1140 and sections already created. */
1157 { /* Is it a file-name argument? */
1160 /* argv->"" if stdin desired, else->filename. */
1161 read_a_source_file (*argv);
1163 argv++; /* Completed that argv. */
1166 read_a_source_file ("");
1171 main (int argc, char ** argv)
1173 char ** argv_orig = argv;
1178 start_time = get_run_time ();
1181 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
1182 setlocale (LC_MESSAGES, "");
1184 #if defined (HAVE_SETLOCALE)
1185 setlocale (LC_CTYPE, "");
1187 bindtextdomain (PACKAGE, LOCALEDIR);
1188 textdomain (PACKAGE);
1193 #ifdef HOST_SPECIAL_INIT
1194 HOST_SPECIAL_INIT (argc, argv);
1198 xmalloc_set_program_name (myname);
1200 expandargv (&argc, &argv);
1202 START_PROGRESS (myname, 0);
1204 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1205 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1208 out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
1212 bfd_set_error_program_name (myname);
1214 #ifdef USE_EMULATIONS
1215 select_emulation_mode (argc, argv);
1219 /* Call parse_args before any of the init/begin functions
1220 so that switches like --hash-size can be honored. */
1221 parse_args (&argc, &argv);
1223 if (argc > 1 && stat (out_file_name, &sob) == 0)
1227 for (i = 1; i < argc; ++i)
1231 if (stat (argv[i], &sib) == 0)
1233 if (sib.st_ino == sob.st_ino)
1235 /* Don't let as_fatal remove the output file! */
1236 out_file_name = NULL;
1237 as_fatal (_("The input and output files must be distinct"));
1247 input_scrub_begin ();
1250 /* It has to be called after dump_statistics (). */
1251 xatexit (close_output_file);
1253 if (flag_print_statistics)
1254 xatexit (dump_statistics);
1258 macro_strip_at = flag_mri;
1261 macro_init (flag_macro_alternate, flag_mri, macro_strip_at, macro_expr);
1265 output_file_create (out_file_name);
1266 gas_assert (stdoutput != 0);
1270 #ifdef tc_init_after_args
1271 tc_init_after_args ();
1278 local_symbol_make (".gasversion.", absolute_section,
1279 BFD_VERSION / 10000UL, &predefined_address_frag);
1281 /* Now that we have fully initialized, and have created the output
1282 file, define any symbols requested by --defsym command line
1284 while (defsyms != NULL)
1287 struct defsym_list *next;
1289 sym = symbol_new (defsyms->name, absolute_section, defsyms->value,
1290 &zero_address_frag);
1291 /* Make symbols defined on the command line volatile, so that they
1292 can be redefined inside a source file. This makes this assembler's
1293 behaviour compatible with earlier versions, but it may not be
1294 completely intuitive. */
1295 S_SET_VOLATILE (sym);
1296 symbol_table_insert (sym);
1297 next = defsyms->next;
1305 perform_an_assembly_pass (argc, argv);
1307 cond_finish_check (-1);
1313 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1314 if ((flag_execstack || flag_noexecstack)
1315 && OUTPUT_FLAVOR == bfd_target_elf_flavour)
1319 gnustack = subseg_new (".note.GNU-stack", 0);
1320 bfd_set_section_flags (stdoutput, gnustack,
1321 SEC_READONLY | (flag_execstack ? SEC_CODE : 0));
1326 /* If we've been collecting dwarf2 .debug_line info, either for
1327 assembly debugging or on behalf of the compiler, emit it now. */
1330 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1331 directives from the user or by the backend, emit it now. */
1335 if (seen_at_least_1_file ())
1337 int n_warns, n_errs;
1341 write_object_file ();
1343 n_warns = had_warnings ();
1344 n_errs = had_errors ();
1347 ngettext ("%d warning", "%d warnings", n_warns), n_warns);
1349 ngettext ("%d error", "%d errors", n_errs), n_errs);
1350 if (flag_fatal_warnings && n_warns != 0)
1353 as_bad (_("%s, treating warnings as errors"), warn_msg);
1359 else if (flag_always_generate_output)
1361 /* The -Z flag indicates that an object file should be generated,
1362 regardless of warnings and errors. */
1364 fprintf (stderr, _("%s, %s, generating bad object file\n"),
1372 listing_print (listing_filename, argv_orig);
1377 END_PROGRESS (myname);
1379 /* Use xexit instead of return, because under VMS environments they
1380 may not place the same interpretation on the value given. */
1381 if (had_errors () != 0)
1382 xexit (EXIT_FAILURE);
1384 /* Only generate dependency file if assembler was successful. */
1385 print_dependencies ();
1387 xexit (EXIT_SUCCESS);