1 /* as.c - GAS main program.
2 Copyright (C) 1987-2017 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"
51 /* Perform any cgen specific initialisation for gas. */
52 extern void gas_cgen_begin (void);
55 /* We build a list of defsyms as we read the options, and then define
56 them after we have initialized everything. */
59 struct defsym_list *next;
65 /* True if a listing is wanted. */
68 /* Type of debugging to generate. */
69 enum debug_info_type debug_type = DEBUG_UNSPECIFIED;
70 int use_gnu_debug_info_extensions = 0;
72 #ifndef MD_DEBUG_FORMAT_SELECTOR
73 #define MD_DEBUG_FORMAT_SELECTOR NULL
75 static enum debug_info_type (*md_debug_format_selector) (int *) = MD_DEBUG_FORMAT_SELECTOR;
77 /* Maximum level of macro nesting. */
78 int max_macro_nest = 100;
83 /* The default obstack chunk size. If we set this to zero, the
84 obstack code will use whatever will fit in a 4096 byte block. */
87 /* To monitor memory allocation more effectively, make this non-zero.
88 Then the chunk sizes for gas and bfd will be reduced. */
91 /* Enable verbose mode. */
94 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
95 int flag_use_elf_stt_common = DEFAULT_GENERATE_ELF_STT_COMMON;
98 /* Keep the output file. */
99 static int keep_it = 0;
107 /* Name of listing file. */
108 static char *listing_filename = NULL;
110 static struct defsym_list *defsyms;
113 /* Keep a record of the itbl files we read in. */
114 struct itbl_file_list
116 struct itbl_file_list *next;
119 static struct itbl_file_list *itbl_files;
122 static long start_time;
124 static int flag_macro_alternate;
127 #ifdef USE_EMULATIONS
128 #define EMULATION_ENVIRON "AS_EMULATION"
130 extern struct emulation mipsbelf, mipslelf, mipself;
131 extern struct emulation i386coff, i386elf, i386aout;
132 extern struct emulation crisaout, criself;
134 static struct emulation *const emulations[] = { EMULATIONS };
135 static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]);
138 select_emulation_mode (int argc, char **argv)
142 const char *em = NULL;
144 for (i = 1; i < argc; i++)
145 if (!strncmp ("--em", argv[i], 4))
151 p = strchr (argv[i], '=');
158 as_fatal (_("missing emulation mode name"));
163 em = getenv (EMULATION_ENVIRON);
165 em = DEFAULT_EMULATION;
169 for (i = 0; i < n_emulations; i++)
170 if (!strcmp (emulations[i]->name, em))
172 if (i == n_emulations)
173 as_fatal (_("unrecognized emulation name `%s'"), em);
174 this_emulation = emulations[i];
177 this_emulation = emulations[0];
179 this_emulation->init ();
183 default_emul_bfd_name (void)
190 common_emul_init (void)
192 this_format = this_emulation->format;
194 if (this_emulation->leading_underscore == 2)
195 this_emulation->leading_underscore = this_format->dfl_leading_underscore;
197 if (this_emulation->default_endian != 2)
198 target_big_endian = this_emulation->default_endian;
200 if (this_emulation->fake_label_name == 0)
202 if (this_emulation->leading_underscore)
203 this_emulation->fake_label_name = FAKE_LABEL_NAME;
205 /* What other parameters should we test? */
206 this_emulation->fake_label_name = "." FAKE_LABEL_NAME;
212 print_version_id (void)
220 fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s\n"),
221 VERSION, TARGET_ALIAS, BFD_VERSION_STRING);
224 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
225 enum compressed_debug_section_type flag_compress_debug
226 = COMPRESS_DEBUG_GABI_ZLIB;
230 show_usage (FILE * stream)
232 fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname);
234 fprintf (stream, _("\
236 -a[sub-option...] turn on listings\n\
237 Sub-options [default hls]:\n\
238 c omit false conditionals\n\
239 d omit debugging directives\n\
240 g include general info\n\
241 h include high-level source\n\
242 l include assembly\n\
243 m include macro expansions\n\
244 n omit forms processing\n\
246 =FILE list to FILE (must be last sub-option)\n"));
248 fprintf (stream, _("\
249 --alternate initially turn on alternate macro syntax\n"));
250 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
251 fprintf (stream, _("\
252 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
253 compress DWARF debug sections using zlib [default]\n"));
254 fprintf (stream, _("\
255 --nocompress-debug-sections\n\
256 don't compress DWARF debug sections\n"));
258 fprintf (stream, _("\
259 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
260 compress DWARF debug sections using zlib\n"));
261 fprintf (stream, _("\
262 --nocompress-debug-sections\n\
263 don't compress DWARF debug sections [default]\n"));
265 fprintf (stream, _("\
266 -D produce assembler debugging messages\n"));
267 fprintf (stream, _("\
268 --debug-prefix-map OLD=NEW\n\
269 map OLD to NEW in debug information\n"));
270 fprintf (stream, _("\
271 --defsym SYM=VAL define symbol SYM to given value\n"));
272 #ifdef USE_EMULATIONS
279 for (i = 0; i < n_emulations - 1; i++)
280 fprintf (stream, "%s | ", emulations[i]->name);
281 fprintf (stream, "%s]\n", emulations[i]->name);
283 def_em = getenv (EMULATION_ENVIRON);
285 def_em = DEFAULT_EMULATION;
286 fprintf (stream, _("\
287 emulate output (default %s)\n"), def_em);
290 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
291 fprintf (stream, _("\
292 --execstack require executable stack for this object\n"));
293 fprintf (stream, _("\
294 --noexecstack don't require executable stack for this object\n"));
295 fprintf (stream, _("\
296 --size-check=[error|warning]\n\
297 ELF .size directive check (default --size-check=error)\n"));
298 fprintf (stream, _("\
299 --elf-stt-common=[no|yes]\n\
300 generate ELF common symbols with STT_COMMON type\n"));
301 fprintf (stream, _("\
302 --sectname-subst enable section name substitution sequences\n"));
304 fprintf (stream, _("\
305 -f skip whitespace and comment preprocessing\n"));
306 fprintf (stream, _("\
307 -g --gen-debug generate debugging information\n"));
308 fprintf (stream, _("\
309 --gstabs generate STABS debugging information\n"));
310 fprintf (stream, _("\
311 --gstabs+ generate STABS debug info with GNU extensions\n"));
312 fprintf (stream, _("\
313 --gdwarf-2 generate DWARF2 debugging information\n"));
314 fprintf (stream, _("\
315 --gdwarf-sections generate per-function section names for DWARF line information\n"));
316 fprintf (stream, _("\
317 --hash-size=<value> set the hash table size close to <value>\n"));
318 fprintf (stream, _("\
319 --help show this message and exit\n"));
320 fprintf (stream, _("\
321 --target-help show target specific options\n"));
322 fprintf (stream, _("\
323 -I DIR add DIR to search list for .include directives\n"));
324 fprintf (stream, _("\
325 -J don't warn about signed overflow\n"));
326 fprintf (stream, _("\
327 -K warn when differences altered for long displacements\n"));
328 fprintf (stream, _("\
329 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
330 fprintf (stream, _("\
331 -M,--mri assemble in MRI compatibility mode\n"));
332 fprintf (stream, _("\
333 --MD FILE write dependency information in FILE (default none)\n"));
334 fprintf (stream, _("\
336 fprintf (stream, _("\
337 -no-pad-sections do not pad the end of sections to alignment boundaries\n"));
338 fprintf (stream, _("\
339 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
340 fprintf (stream, _("\
341 -R fold data section into text section\n"));
342 fprintf (stream, _("\
343 --reduce-memory-overheads \n\
344 prefer smaller memory use at the cost of longer\n\
346 fprintf (stream, _("\
347 --statistics print various measured statistics from execution\n"));
348 fprintf (stream, _("\
349 --strip-local-absolute strip local absolute symbols\n"));
350 fprintf (stream, _("\
351 --traditional-format Use same format as native assembler when possible\n"));
352 fprintf (stream, _("\
353 --version print assembler version number and exit\n"));
354 fprintf (stream, _("\
355 -W --no-warn suppress warnings\n"));
356 fprintf (stream, _("\
357 --warn don't suppress warnings\n"));
358 fprintf (stream, _("\
359 --fatal-warnings treat warnings as errors\n"));
361 fprintf (stream, _("\
362 --itbl INSTTBL extend instruction set to include instructions\n\
363 matching the specifications defined in file INSTTBL\n"));
365 fprintf (stream, _("\
367 fprintf (stream, _("\
369 fprintf (stream, _("\
370 -Z generate object file even after errors\n"));
371 fprintf (stream, _("\
372 --listing-lhs-width set the width in words of the output data column of\n\
374 fprintf (stream, _("\
375 --listing-lhs-width2 set the width in words of the continuation lines\n\
376 of the output data column; ignored if smaller than\n\
377 the width of the first line\n"));
378 fprintf (stream, _("\
379 --listing-rhs-width set the max width in characters of the lines from\n\
380 the source file\n"));
381 fprintf (stream, _("\
382 --listing-cont-lines set the maximum number of continuation lines used\n\
383 for the output data column of the listing\n"));
384 fprintf (stream, _("\
385 @FILE read options from FILE\n"));
387 md_show_usage (stream);
389 fputc ('\n', stream);
391 if (REPORT_BUGS_TO[0] && stream == stdout)
392 fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
395 /* Since it is easy to do here we interpret the special arg "-"
396 to mean "use stdin" and we set that argv[] pointing to "".
397 After we have munged argv[], the only things left are source file
398 name(s) and ""(s) denoting stdin. These file names are used
399 (perhaps more than once) later.
401 check for new machine-dep cmdline options in
402 md_parse_option definitions in config/tc-*.c. */
405 parse_args (int * pargc, char *** pargv)
411 /* Starting the short option string with '-' is for programs that
412 expect options and other ARGV-elements in any order and that care about
413 the ordering of the two. We describe each non-option ARGV-element
414 as if it were the argument of an option with character code 1. */
416 extern const char *md_shortopts;
417 static const char std_shortopts[] =
420 #ifndef WORKING_DOT_WORD
421 /* -K is not meaningful if .word is not being hacked. */
424 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
426 /* -v takes an argument on VMS, so we don't make it a generic
432 /* New option for extending instruction set (see also --itbl below). */
437 struct option *longopts;
438 extern struct option md_longopts[];
439 extern size_t md_longopts_size;
440 /* Codes used for the long options with no short synonyms. */
443 OPTION_HELP = OPTION_STD_BASE,
450 OPTION_DEBUG_PREFIX_MAP,
452 OPTION_LISTING_LHS_WIDTH,
453 OPTION_LISTING_LHS_WIDTH2,
454 OPTION_LISTING_RHS_WIDTH,
455 OPTION_LISTING_CONT_LINES,
460 OPTION_GDWARF_SECTIONS,
461 OPTION_STRIP_LOCAL_ABSOLUTE,
462 OPTION_TRADITIONAL_FORMAT,
468 OPTION_ELF_STT_COMMON,
469 OPTION_SECTNAME_SUBST,
472 OPTION_HASH_TABLE_SIZE,
473 OPTION_REDUCE_MEMORY_OVERHEADS,
475 OPTION_COMPRESS_DEBUG,
476 OPTION_NOCOMPRESS_DEBUG,
477 OPTION_NO_PAD_SECTIONS /* = STD_BASE + 40 */
478 /* When you add options here, check that they do
479 not collide with OPTION_MD_BASE. See as.h. */
482 static const struct option std_longopts[] =
484 /* Note: commas are placed at the start of the line rather than
485 the end of the preceding line so that it is simpler to
486 selectively add and remove lines from this list. */
487 {"alternate", no_argument, NULL, OPTION_ALTERNATE}
488 /* The entry for "a" is here to prevent getopt_long_only() from
489 considering that -a is an abbreviation for --alternate. This is
490 necessary because -a=<FILE> is a valid switch but getopt would
491 normally reject it since --alternate does not take an argument. */
492 ,{"a", optional_argument, NULL, 'a'}
493 /* Handle -al=<FILE>. */
494 ,{"al", optional_argument, NULL, OPTION_AL}
495 ,{"compress-debug-sections", optional_argument, NULL, OPTION_COMPRESS_DEBUG}
496 ,{"nocompress-debug-sections", no_argument, NULL, OPTION_NOCOMPRESS_DEBUG}
497 ,{"debug-prefix-map", required_argument, NULL, OPTION_DEBUG_PREFIX_MAP}
498 ,{"defsym", required_argument, NULL, OPTION_DEFSYM}
499 ,{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG}
500 ,{"emulation", required_argument, NULL, OPTION_EMULATION}
501 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
502 ,{"execstack", no_argument, NULL, OPTION_EXECSTACK}
503 ,{"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK}
504 ,{"size-check", required_argument, NULL, OPTION_SIZE_CHECK}
505 ,{"elf-stt-common", required_argument, NULL, OPTION_ELF_STT_COMMON}
506 ,{"sectname-subst", no_argument, NULL, OPTION_SECTNAME_SUBST}
508 ,{"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL}
509 ,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF2}
510 /* GCC uses --gdwarf-2 but GAS uses to use --gdwarf2,
511 so we keep it here for backwards compatibility. */
512 ,{"gdwarf2", no_argument, NULL, OPTION_GDWARF2}
513 ,{"gdwarf-sections", no_argument, NULL, OPTION_GDWARF_SECTIONS}
514 ,{"gen-debug", no_argument, NULL, 'g'}
515 ,{"gstabs", no_argument, NULL, OPTION_GSTABS}
516 ,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS}
517 ,{"hash-size", required_argument, NULL, OPTION_HASH_TABLE_SIZE}
518 ,{"help", no_argument, NULL, OPTION_HELP}
520 /* New option for extending instruction set (see also -t above).
521 The "-t file" or "--itbl file" option extends the basic set of
522 valid instructions by reading "file", a text file containing a
523 list of instruction formats. The additional opcodes and their
524 formats are added to the built-in set of instructions, and
525 mnemonics for new registers may also be defined. */
526 ,{"itbl", required_argument, NULL, 't'}
528 /* getopt allows abbreviations, so we do this to stop it from
529 treating -k as an abbreviation for --keep-locals. Some
530 ports use -k to enable PIC assembly. */
531 ,{"keep-locals", no_argument, NULL, 'L'}
532 ,{"keep-locals", no_argument, NULL, 'L'}
533 ,{"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH}
534 ,{"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2}
535 ,{"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH}
536 ,{"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES}
537 ,{"MD", required_argument, NULL, OPTION_DEPFILE}
538 ,{"mri", no_argument, NULL, 'M'}
539 ,{"nocpp", no_argument, NULL, OPTION_NOCPP}
540 ,{"no-pad-sections", no_argument, NULL, OPTION_NO_PAD_SECTIONS}
541 ,{"no-warn", no_argument, NULL, 'W'}
542 ,{"reduce-memory-overheads", no_argument, NULL, OPTION_REDUCE_MEMORY_OVERHEADS}
543 ,{"statistics", no_argument, NULL, OPTION_STATISTICS}
544 ,{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE}
545 ,{"version", no_argument, NULL, OPTION_VERSION}
546 ,{"verbose", no_argument, NULL, OPTION_VERBOSE}
547 ,{"target-help", no_argument, NULL, OPTION_TARGET_HELP}
548 ,{"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT}
549 ,{"warn", no_argument, NULL, OPTION_WARN}
552 /* Construct the option lists from the standard list and the target
553 dependent list. Include space for an extra NULL option and
554 always NULL terminate. */
555 shortopts = concat (std_shortopts, md_shortopts, (char *) NULL);
556 longopts = (struct option *) xmalloc (sizeof (std_longopts)
557 + md_longopts_size + sizeof (struct option));
558 memcpy (longopts, std_longopts, sizeof (std_longopts));
559 memcpy (((char *) longopts) + sizeof (std_longopts), md_longopts, md_longopts_size);
560 memset (((char *) longopts) + sizeof (std_longopts) + md_longopts_size,
561 0, sizeof (struct option));
563 /* Make a local copy of the old argv. */
567 /* Initialize a new argv that contains no options. */
568 new_argv = XNEWVEC (char *, old_argc + 1);
569 new_argv[0] = old_argv[0];
571 new_argv[new_argc] = NULL;
575 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
576 indicate a long option. */
578 int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts,
587 /* md_parse_option should return 1 if it recognizes optc,
589 if (md_parse_option (optc, optarg) != 0)
591 /* `-v' isn't included in the general short_opts list, so check for
592 it explicitly here before deciding we've gotten a bad argument. */
596 /* Telling getopt to treat -v's value as optional can result
597 in it picking up a following filename argument here. The
598 VMS code in md_parse_option can return 0 in that case,
599 but it has no way of pushing the filename argument back. */
600 if (optarg && *optarg)
601 new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL;
612 as_bad (_("unrecognized option -%c%s"), optc, optarg ? optarg : "");
618 case 1: /* File name. */
619 if (!strcmp (optarg, "-"))
620 optarg = (char *) "";
621 new_argv[new_argc++] = optarg;
622 new_argv[new_argc] = NULL;
625 case OPTION_TARGET_HELP:
626 md_show_usage (stdout);
636 case OPTION_NO_PAD_SECTIONS:
637 do_not_pad_sections_to_alignment = 1;
640 case OPTION_STATISTICS:
641 flag_print_statistics = 1;
644 case OPTION_STRIP_LOCAL_ABSOLUTE:
645 flag_strip_local_absolute = 1;
648 case OPTION_TRADITIONAL_FORMAT:
649 flag_traditional_format = 1;
653 /* This output is intended to follow the GNU standards document. */
654 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING);
655 printf (_("Copyright (C) 2017 Free Software Foundation, Inc.\n"));
657 This program is free software; you may redistribute it under the terms of\n\
658 the GNU General Public License version 3 or later.\n\
659 This program has absolutely no warranty.\n"));
660 #ifdef TARGET_WITH_CPU
661 printf (_("This assembler was configured for a target of `%s' "
662 "and default,\ncpu type `%s'.\n"),
663 TARGET_ALIAS, TARGET_WITH_CPU);
665 printf (_("This assembler was configured for a target of `%s'.\n"),
670 case OPTION_EMULATION:
671 #ifdef USE_EMULATIONS
672 if (strcmp (optarg, this_emulation->name))
673 as_fatal (_("multiple emulation names specified"));
675 as_fatal (_("emulations not handled in this configuration"));
679 case OPTION_DUMPCONFIG:
680 fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS);
681 fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL);
682 fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU);
683 #ifdef TARGET_OBJ_FORMAT
684 fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT);
687 fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT);
691 case OPTION_COMPRESS_DEBUG:
694 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
695 if (strcasecmp (optarg, "none") == 0)
696 flag_compress_debug = COMPRESS_DEBUG_NONE;
697 else if (strcasecmp (optarg, "zlib") == 0)
698 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
699 else if (strcasecmp (optarg, "zlib-gnu") == 0)
700 flag_compress_debug = COMPRESS_DEBUG_GNU_ZLIB;
701 else if (strcasecmp (optarg, "zlib-gabi") == 0)
702 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
704 as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
707 as_fatal (_("--compress-debug-sections=%s is unsupported"),
712 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
715 case OPTION_NOCOMPRESS_DEBUG:
716 flag_compress_debug = COMPRESS_DEBUG_NONE;
719 case OPTION_DEBUG_PREFIX_MAP:
720 add_debug_prefix_map (optarg);
727 struct defsym_list *n;
729 for (s = optarg; *s != '\0' && *s != '='; s++)
732 as_fatal (_("bad defsym; format is --defsym name=value"));
734 i = bfd_scan_vma (s, (const char **) NULL, 0);
735 n = XNEW (struct defsym_list);
746 /* optarg is the name of the file containing the instruction
747 formats, opcodes, register names, etc. */
748 struct itbl_file_list *n;
752 as_warn (_("no file name following -t option"));
756 n = XNEW (struct itbl_file_list);
757 n->next = itbl_files;
761 /* Parse the file and add the new instructions to our internal
762 table. If multiple instruction tables are specified, the
763 information from this table gets appended onto the existing
765 itbl_files->name = xstrdup (optarg);
766 if (itbl_parse (itbl_files->name) != 0)
767 as_fatal (_("failed to read instruction table %s\n"),
774 start_dependencies (optarg);
778 /* Some backends, eg Alpha and Mips, use the -g switch for their
779 own purposes. So we check here for an explicit -g and allow
780 the backend to decide if it wants to process it. */
781 if ( old_argv[optind - 1][1] == 'g'
782 && md_parse_option (optc, optarg))
785 if (md_debug_format_selector)
786 debug_type = md_debug_format_selector (& use_gnu_debug_info_extensions);
788 debug_type = DEBUG_DWARF2;
790 debug_type = DEBUG_STABS;
793 case OPTION_GSTABS_PLUS:
794 use_gnu_debug_info_extensions = 1;
797 debug_type = DEBUG_STABS;
801 debug_type = DEBUG_DWARF2;
804 case OPTION_GDWARF_SECTIONS:
805 flag_dwarf_sections = TRUE;
809 flag_signed_overflow_ok = 1;
812 #ifndef WORKING_DOT_WORD
814 flag_warn_displacement = 1;
818 flag_keep_locals = 1;
821 case OPTION_LISTING_LHS_WIDTH:
822 listing_lhs_width = atoi (optarg);
823 if (listing_lhs_width_second < listing_lhs_width)
824 listing_lhs_width_second = listing_lhs_width;
826 case OPTION_LISTING_LHS_WIDTH2:
828 int tmp = atoi (optarg);
830 if (tmp > listing_lhs_width)
831 listing_lhs_width_second = tmp;
834 case OPTION_LISTING_RHS_WIDTH:
835 listing_rhs_width = atoi (optarg);
837 case OPTION_LISTING_CONT_LINES:
838 listing_lhs_cont_lines = atoi (optarg);
849 flag_readonly_data_in_text = 1;
853 flag_no_warnings = 1;
857 flag_no_warnings = 0;
858 flag_fatal_warnings = 0;
861 case OPTION_WARN_FATAL:
862 flag_no_warnings = 0;
863 flag_fatal_warnings = 1;
866 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
867 case OPTION_EXECSTACK:
869 flag_noexecstack = 0;
872 case OPTION_NOEXECSTACK:
873 flag_noexecstack = 1;
877 case OPTION_SIZE_CHECK:
878 if (strcasecmp (optarg, "error") == 0)
879 flag_allow_nonconst_size = FALSE;
880 else if (strcasecmp (optarg, "warning") == 0)
881 flag_allow_nonconst_size = TRUE;
883 as_fatal (_("Invalid --size-check= option: `%s'"), optarg);
886 case OPTION_ELF_STT_COMMON:
887 if (strcasecmp (optarg, "no") == 0)
888 flag_use_elf_stt_common = 0;
889 else if (strcasecmp (optarg, "yes") == 0)
890 flag_use_elf_stt_common = 1;
892 as_fatal (_("Invalid --elf-stt-common= option: `%s'"),
896 case OPTION_SECTNAME_SUBST:
897 flag_sectname_subst = 1;
901 flag_always_generate_output = 1;
905 listing |= LISTING_LISTING;
907 listing_filename = xstrdup (optarg);
910 case OPTION_ALTERNATE:
911 optarg = old_argv [optind - 1];
912 while (* optarg == '-')
915 if (strcmp (optarg, "alternate") == 0)
917 flag_macro_alternate = 1;
926 if (optarg != old_argv[optind] && optarg[-1] == '=')
929 if (md_parse_option (optc, optarg) != 0)
937 listing |= LISTING_NOCOND;
940 listing |= LISTING_NODEBUG;
943 listing |= LISTING_GENERAL;
946 listing |= LISTING_HLL;
949 listing |= LISTING_LISTING;
952 listing |= LISTING_MACEXP;
955 listing |= LISTING_NOFORM;
958 listing |= LISTING_SYMBOLS;
961 listing_filename = xstrdup (optarg + 1);
962 optarg += strlen (listing_filename);
965 as_fatal (_("invalid listing option `%c'"), *optarg);
972 listing = LISTING_DEFAULT;
976 /* DEBUG is implemented: it debugs different
977 things from other people's assemblers. */
982 flag_no_comments = 1;
986 { /* Include file directory. */
987 char *temp = xstrdup (optarg);
989 add_include_dir (temp);
994 out_file_name = xstrdup (optarg);
1001 /* -X means treat warnings as errors. */
1004 case OPTION_REDUCE_MEMORY_OVERHEADS:
1005 /* The only change we make at the moment is to reduce
1006 the size of the hash tables that we use. */
1007 set_gas_hash_table_size (4051);
1010 case OPTION_HASH_TABLE_SIZE:
1012 unsigned long new_size;
1014 new_size = strtoul (optarg, NULL, 0);
1016 set_gas_hash_table_size (new_size);
1018 as_fatal (_("--hash-size needs a numeric argument"));
1030 #ifdef md_after_parse_args
1031 md_after_parse_args ();
1036 dump_statistics (void)
1038 long run_time = get_run_time () - start_time;
1040 fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"),
1041 myname, run_time / 1000000, run_time % 1000000);
1043 subsegs_print_statistics (stderr);
1044 write_print_statistics (stderr);
1045 symbol_print_statistics (stderr);
1046 read_print_statistics (stderr);
1048 #ifdef tc_print_statistics
1049 tc_print_statistics (stderr);
1052 #ifdef obj_print_statistics
1053 obj_print_statistics (stderr);
1058 close_output_file (void)
1060 output_file_close (out_file_name);
1062 unlink_if_ordinary (out_file_name);
1065 /* The interface between the macro code and gas expression handling. */
1068 macro_expr (const char *emsg, size_t idx, sb *in, offsetT *val)
1075 hold = input_line_pointer;
1076 input_line_pointer = in->ptr + idx;
1077 expression_and_evaluate (&ex);
1078 idx = input_line_pointer - in->ptr;
1079 input_line_pointer = hold;
1081 if (ex.X_op != O_constant)
1082 as_bad ("%s", emsg);
1084 *val = ex.X_add_number;
1089 /* Here to attempt 1 pass over each input file.
1090 We scan argv[*] looking for filenames or exactly "" which is
1091 shorthand for stdin. Any argv that is NULL is not a file-name.
1092 We set need_pass_2 TRUE if, after this, we still have unresolved
1093 expressions of the form (unknown value)+-(unknown value).
1095 Note the un*x semantics: there is only 1 logical input file, but it
1096 may be a catenation of many 'physical' input files. */
1099 perform_an_assembly_pass (int argc, char ** argv)
1103 flagword applicable;
1109 /* Create the standard sections, and those the assembler uses
1111 text_section = subseg_new (TEXT_SECTION_NAME, 0);
1112 data_section = subseg_new (DATA_SECTION_NAME, 0);
1113 bss_section = subseg_new (BSS_SECTION_NAME, 0);
1114 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1115 to have relocs, otherwise we don't find out in time. */
1116 applicable = bfd_applicable_section_flags (stdoutput);
1117 bfd_set_section_flags (stdoutput, text_section,
1118 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1119 | SEC_CODE | SEC_READONLY));
1120 bfd_set_section_flags (stdoutput, data_section,
1121 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1123 bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC);
1124 seg_info (bss_section)->bss = 1;
1126 subseg_new (BFD_ABS_SECTION_NAME, 0);
1127 subseg_new (BFD_UND_SECTION_NAME, 0);
1128 reg_section = subseg_new ("*GAS `reg' section*", 0);
1129 expr_section = subseg_new ("*GAS `expr' section*", 0);
1132 subseg_set (text_section, 0);
1135 /* This may add symbol table entries, which requires having an open BFD,
1136 and sections already created. */
1153 { /* Is it a file-name argument? */
1156 /* argv->"" if stdin desired, else->filename. */
1157 read_a_source_file (*argv);
1159 argv++; /* Completed that argv. */
1162 read_a_source_file ("");
1167 main (int argc, char ** argv)
1169 char ** argv_orig = argv;
1173 start_time = get_run_time ();
1176 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
1177 setlocale (LC_MESSAGES, "");
1179 #if defined (HAVE_SETLOCALE)
1180 setlocale (LC_CTYPE, "");
1182 bindtextdomain (PACKAGE, LOCALEDIR);
1183 textdomain (PACKAGE);
1188 #ifdef HOST_SPECIAL_INIT
1189 HOST_SPECIAL_INIT (argc, argv);
1193 xmalloc_set_program_name (myname);
1195 expandargv (&argc, &argv);
1197 START_PROGRESS (myname, 0);
1199 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1200 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1203 out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
1207 bfd_set_error_program_name (myname);
1209 #ifdef USE_EMULATIONS
1210 select_emulation_mode (argc, argv);
1214 /* Call parse_args before any of the init/begin functions
1215 so that switches like --hash-size can be honored. */
1216 parse_args (&argc, &argv);
1221 input_scrub_begin ();
1224 /* It has to be called after dump_statistics (). */
1225 xatexit (close_output_file);
1227 if (flag_print_statistics)
1228 xatexit (dump_statistics);
1232 macro_strip_at = flag_mri;
1235 macro_init (flag_macro_alternate, flag_mri, macro_strip_at, macro_expr);
1239 output_file_create (out_file_name);
1240 gas_assert (stdoutput != 0);
1244 #ifdef tc_init_after_args
1245 tc_init_after_args ();
1252 local_symbol_make (".gasversion.", absolute_section,
1253 BFD_VERSION / 10000UL, &predefined_address_frag);
1255 /* Now that we have fully initialized, and have created the output
1256 file, define any symbols requested by --defsym command line
1258 while (defsyms != NULL)
1261 struct defsym_list *next;
1263 sym = symbol_new (defsyms->name, absolute_section, defsyms->value,
1264 &zero_address_frag);
1265 /* Make symbols defined on the command line volatile, so that they
1266 can be redefined inside a source file. This makes this assembler's
1267 behaviour compatible with earlier versions, but it may not be
1268 completely intuitive. */
1269 S_SET_VOLATILE (sym);
1270 symbol_table_insert (sym);
1271 next = defsyms->next;
1279 perform_an_assembly_pass (argc, argv);
1281 cond_finish_check (-1);
1287 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1288 if ((flag_execstack || flag_noexecstack)
1289 && OUTPUT_FLAVOR == bfd_target_elf_flavour)
1293 gnustack = subseg_new (".note.GNU-stack", 0);
1294 bfd_set_section_flags (stdoutput, gnustack,
1295 SEC_READONLY | (flag_execstack ? SEC_CODE : 0));
1300 /* If we've been collecting dwarf2 .debug_line info, either for
1301 assembly debugging or on behalf of the compiler, emit it now. */
1304 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1305 directives from the user or by the backend, emit it now. */
1309 if (seen_at_least_1_file ())
1311 int n_warns, n_errs;
1315 write_object_file ();
1317 n_warns = had_warnings ();
1318 n_errs = had_errors ();
1321 ngettext ("%d warning", "%d warnings", n_warns), n_warns);
1323 ngettext ("%d error", "%d errors", n_errs), n_errs);
1324 if (flag_fatal_warnings && n_warns != 0)
1327 as_bad (_("%s, treating warnings as errors"), warn_msg);
1333 else if (flag_always_generate_output)
1335 /* The -Z flag indicates that an object file should be generated,
1336 regardless of warnings and errors. */
1338 fprintf (stderr, _("%s, %s, generating bad object file\n"),
1346 listing_print (listing_filename, argv_orig);
1351 END_PROGRESS (myname);
1353 /* Use xexit instead of return, because under VMS environments they
1354 may not place the same interpretation on the value given. */
1355 if (had_errors () != 0)
1356 xexit (EXIT_FAILURE);
1358 /* Only generate dependency file if assembler was successful. */
1359 print_dependencies ();
1361 xexit (EXIT_SUCCESS);