1 /* as.c - GAS main program.
2 Copyright (C) 1987-2016 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 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
100 int flag_use_elf_stt_common = DEFAULT_GENERATE_ELF_STT_COMMON;
103 /* Keep the output file. */
104 static int keep_it = 0;
112 /* Name of listing file. */
113 static char *listing_filename = NULL;
115 static struct defsym_list *defsyms;
118 /* Keep a record of the itbl files we read in. */
119 struct itbl_file_list
121 struct itbl_file_list *next;
124 static struct itbl_file_list *itbl_files;
127 static long start_time;
132 static int flag_macro_alternate;
135 #ifdef USE_EMULATIONS
136 #define EMULATION_ENVIRON "AS_EMULATION"
138 extern struct emulation mipsbelf, mipslelf, mipself;
139 extern struct emulation i386coff, i386elf, i386aout;
140 extern struct emulation crisaout, criself;
142 static struct emulation *const emulations[] = { EMULATIONS };
143 static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]);
146 select_emulation_mode (int argc, char **argv)
150 const char *em = NULL;
152 for (i = 1; i < argc; i++)
153 if (!strncmp ("--em", argv[i], 4))
159 p = strchr (argv[i], '=');
166 as_fatal (_("missing emulation mode name"));
171 em = getenv (EMULATION_ENVIRON);
173 em = DEFAULT_EMULATION;
177 for (i = 0; i < n_emulations; i++)
178 if (!strcmp (emulations[i]->name, em))
180 if (i == n_emulations)
181 as_fatal (_("unrecognized emulation name `%s'"), em);
182 this_emulation = emulations[i];
185 this_emulation = emulations[0];
187 this_emulation->init ();
191 default_emul_bfd_name (void)
198 common_emul_init (void)
200 this_format = this_emulation->format;
202 if (this_emulation->leading_underscore == 2)
203 this_emulation->leading_underscore = this_format->dfl_leading_underscore;
205 if (this_emulation->default_endian != 2)
206 target_big_endian = this_emulation->default_endian;
208 if (this_emulation->fake_label_name == 0)
210 if (this_emulation->leading_underscore)
211 this_emulation->fake_label_name = "L0\001";
213 /* What other parameters should we test? */
214 this_emulation->fake_label_name = ".L0\001";
220 print_version_id (void)
228 fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s\n"),
229 VERSION, TARGET_ALIAS, BFD_VERSION_STRING);
232 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
233 enum compressed_debug_section_type flag_compress_debug
234 = COMPRESS_DEBUG_GABI_ZLIB;
238 show_usage (FILE * stream)
240 fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname);
242 fprintf (stream, _("\
244 -a[sub-option...] turn on listings\n\
245 Sub-options [default hls]:\n\
246 c omit false conditionals\n\
247 d omit debugging directives\n\
248 g include general info\n\
249 h include high-level source\n\
250 l include assembly\n\
251 m include macro expansions\n\
252 n omit forms processing\n\
254 =FILE list to FILE (must be last sub-option)\n"));
256 fprintf (stream, _("\
257 --alternate initially turn on alternate macro syntax\n"));
258 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
259 fprintf (stream, _("\
260 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
261 compress DWARF debug sections using zlib [default]\n"));
262 fprintf (stream, _("\
263 --nocompress-debug-sections\n\
264 don't compress DWARF debug sections\n"));
266 fprintf (stream, _("\
267 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
268 compress DWARF debug sections using zlib\n"));
269 fprintf (stream, _("\
270 --nocompress-debug-sections\n\
271 don't compress DWARF debug sections [default]\n"));
273 fprintf (stream, _("\
274 -D produce assembler debugging messages\n"));
275 fprintf (stream, _("\
276 --debug-prefix-map OLD=NEW\n\
277 map OLD to NEW in debug information\n"));
278 fprintf (stream, _("\
279 --defsym SYM=VAL define symbol SYM to given value\n"));
280 #ifdef USE_EMULATIONS
287 for (i = 0; i < n_emulations - 1; i++)
288 fprintf (stream, "%s | ", emulations[i]->name);
289 fprintf (stream, "%s]\n", emulations[i]->name);
291 def_em = getenv (EMULATION_ENVIRON);
293 def_em = DEFAULT_EMULATION;
294 fprintf (stream, _("\
295 emulate output (default %s)\n"), def_em);
298 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
299 fprintf (stream, _("\
300 --execstack require executable stack for this object\n"));
301 fprintf (stream, _("\
302 --noexecstack don't require executable stack for this object\n"));
303 fprintf (stream, _("\
304 --size-check=[error|warning]\n\
305 ELF .size directive check (default --size-check=error)\n"));
306 fprintf (stream, _("\
307 --elf-stt-common=[no|yes]\n\
308 generate ELF common symbols with STT_COMMON type\n"));
309 fprintf (stream, _("\
310 --sectname-subst enable section name substitution sequences\n"));
312 fprintf (stream, _("\
313 -f skip whitespace and comment preprocessing\n"));
314 fprintf (stream, _("\
315 -g --gen-debug generate debugging information\n"));
316 fprintf (stream, _("\
317 --gstabs generate STABS debugging information\n"));
318 fprintf (stream, _("\
319 --gstabs+ generate STABS debug info with GNU extensions\n"));
320 fprintf (stream, _("\
321 --gdwarf-2 generate DWARF2 debugging information\n"));
322 fprintf (stream, _("\
323 --gdwarf-sections generate per-function section names for DWARF line information\n"));
324 fprintf (stream, _("\
325 --hash-size=<value> set the hash table size close to <value>\n"));
326 fprintf (stream, _("\
327 --help show this message and exit\n"));
328 fprintf (stream, _("\
329 --target-help show target specific options\n"));
330 fprintf (stream, _("\
331 -I DIR add DIR to search list for .include directives\n"));
332 fprintf (stream, _("\
333 -J don't warn about signed overflow\n"));
334 fprintf (stream, _("\
335 -K warn when differences altered for long displacements\n"));
336 fprintf (stream, _("\
337 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
338 fprintf (stream, _("\
339 -M,--mri assemble in MRI compatibility mode\n"));
340 fprintf (stream, _("\
341 --MD FILE write dependency information in FILE (default none)\n"));
342 fprintf (stream, _("\
344 fprintf (stream, _("\
345 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
346 fprintf (stream, _("\
347 -R fold data section into text section\n"));
348 fprintf (stream, _("\
349 --reduce-memory-overheads \n\
350 prefer smaller memory use at the cost of longer\n\
352 fprintf (stream, _("\
353 --statistics print various measured statistics from execution\n"));
354 fprintf (stream, _("\
355 --strip-local-absolute strip local absolute symbols\n"));
356 fprintf (stream, _("\
357 --traditional-format Use same format as native assembler when possible\n"));
358 fprintf (stream, _("\
359 --version print assembler version number and exit\n"));
360 fprintf (stream, _("\
361 -W --no-warn suppress warnings\n"));
362 fprintf (stream, _("\
363 --warn don't suppress warnings\n"));
364 fprintf (stream, _("\
365 --fatal-warnings treat warnings as errors\n"));
367 fprintf (stream, _("\
368 --itbl INSTTBL extend instruction set to include instructions\n\
369 matching the specifications defined in file INSTTBL\n"));
371 fprintf (stream, _("\
373 fprintf (stream, _("\
375 fprintf (stream, _("\
376 -Z generate object file even after errors\n"));
377 fprintf (stream, _("\
378 --listing-lhs-width set the width in words of the output data column of\n\
380 fprintf (stream, _("\
381 --listing-lhs-width2 set the width in words of the continuation lines\n\
382 of the output data column; ignored if smaller than\n\
383 the width of the first line\n"));
384 fprintf (stream, _("\
385 --listing-rhs-width set the max width in characters of the lines from\n\
386 the source file\n"));
387 fprintf (stream, _("\
388 --listing-cont-lines set the maximum number of continuation lines used\n\
389 for the output data column of the listing\n"));
390 fprintf (stream, _("\
391 @FILE read options from FILE\n"));
393 md_show_usage (stream);
395 fputc ('\n', stream);
397 if (REPORT_BUGS_TO[0] && stream == stdout)
398 fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
401 /* Since it is easy to do here we interpret the special arg "-"
402 to mean "use stdin" and we set that argv[] pointing to "".
403 After we have munged argv[], the only things left are source file
404 name(s) and ""(s) denoting stdin. These file names are used
405 (perhaps more than once) later.
407 check for new machine-dep cmdline options in
408 md_parse_option definitions in config/tc-*.c. */
411 parse_args (int * pargc, char *** pargv)
417 /* Starting the short option string with '-' is for programs that
418 expect options and other ARGV-elements in any order and that care about
419 the ordering of the two. We describe each non-option ARGV-element
420 as if it were the argument of an option with character code 1. */
422 extern const char *md_shortopts;
423 static const char std_shortopts[] =
426 #ifndef WORKING_DOT_WORD
427 /* -K is not meaningful if .word is not being hacked. */
430 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
432 /* -v takes an argument on VMS, so we don't make it a generic
438 /* New option for extending instruction set (see also --itbl below). */
443 struct option *longopts;
444 extern struct option md_longopts[];
445 extern size_t md_longopts_size;
446 /* Codes used for the long options with no short synonyms. */
449 OPTION_HELP = OPTION_STD_BASE,
456 OPTION_DEBUG_PREFIX_MAP,
458 OPTION_LISTING_LHS_WIDTH,
459 OPTION_LISTING_LHS_WIDTH2,
460 OPTION_LISTING_RHS_WIDTH,
461 OPTION_LISTING_CONT_LINES,
466 OPTION_GDWARF_SECTIONS,
467 OPTION_STRIP_LOCAL_ABSOLUTE,
468 OPTION_TRADITIONAL_FORMAT,
474 OPTION_ELF_STT_COMMON,
475 OPTION_SECTNAME_SUBST,
478 OPTION_HASH_TABLE_SIZE,
479 OPTION_REDUCE_MEMORY_OVERHEADS,
481 OPTION_COMPRESS_DEBUG,
482 OPTION_NOCOMPRESS_DEBUG
483 /* When you add options here, check that they do
484 not collide with OPTION_MD_BASE. See as.h. */
487 static const struct option std_longopts[] =
489 /* Note: commas are placed at the start of the line rather than
490 the end of the preceding line so that it is simpler to
491 selectively add and remove lines from this list. */
492 {"alternate", no_argument, NULL, OPTION_ALTERNATE}
493 /* The entry for "a" is here to prevent getopt_long_only() from
494 considering that -a is an abbreviation for --alternate. This is
495 necessary because -a=<FILE> is a valid switch but getopt would
496 normally reject it since --alternate does not take an argument. */
497 ,{"a", optional_argument, NULL, 'a'}
498 /* Handle -al=<FILE>. */
499 ,{"al", optional_argument, NULL, OPTION_AL}
500 ,{"compress-debug-sections", optional_argument, NULL, OPTION_COMPRESS_DEBUG}
501 ,{"nocompress-debug-sections", no_argument, NULL, OPTION_NOCOMPRESS_DEBUG}
502 ,{"debug-prefix-map", required_argument, NULL, OPTION_DEBUG_PREFIX_MAP}
503 ,{"defsym", required_argument, NULL, OPTION_DEFSYM}
504 ,{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG}
505 ,{"emulation", required_argument, NULL, OPTION_EMULATION}
506 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
507 ,{"execstack", no_argument, NULL, OPTION_EXECSTACK}
508 ,{"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK}
509 ,{"size-check", required_argument, NULL, OPTION_SIZE_CHECK}
510 ,{"elf-stt-common", required_argument, NULL, OPTION_ELF_STT_COMMON}
511 ,{"sectname-subst", no_argument, NULL, OPTION_SECTNAME_SUBST}
513 ,{"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL}
514 ,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF2}
515 /* GCC uses --gdwarf-2 but GAS uses to use --gdwarf2,
516 so we keep it here for backwards compatibility. */
517 ,{"gdwarf2", no_argument, NULL, OPTION_GDWARF2}
518 ,{"gdwarf-sections", no_argument, NULL, OPTION_GDWARF_SECTIONS}
519 ,{"gen-debug", no_argument, NULL, 'g'}
520 ,{"gstabs", no_argument, NULL, OPTION_GSTABS}
521 ,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS}
522 ,{"hash-size", required_argument, NULL, OPTION_HASH_TABLE_SIZE}
523 ,{"help", no_argument, NULL, OPTION_HELP}
525 /* New option for extending instruction set (see also -t above).
526 The "-t file" or "--itbl file" option extends the basic set of
527 valid instructions by reading "file", a text file containing a
528 list of instruction formats. The additional opcodes and their
529 formats are added to the built-in set of instructions, and
530 mnemonics for new registers may also be defined. */
531 ,{"itbl", required_argument, NULL, 't'}
533 /* getopt allows abbreviations, so we do this to stop it from
534 treating -k as an abbreviation for --keep-locals. Some
535 ports use -k to enable PIC assembly. */
536 ,{"keep-locals", no_argument, NULL, 'L'}
537 ,{"keep-locals", no_argument, NULL, 'L'}
538 ,{"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH}
539 ,{"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2}
540 ,{"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH}
541 ,{"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES}
542 ,{"MD", required_argument, NULL, OPTION_DEPFILE}
543 ,{"mri", no_argument, NULL, 'M'}
544 ,{"nocpp", no_argument, NULL, OPTION_NOCPP}
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 = (char **) xmalloc (sizeof (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, "-"))
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_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) 2016 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 printf (_("This assembler was configured for a target of `%s'.\n"),
664 case OPTION_EMULATION:
665 #ifdef USE_EMULATIONS
666 if (strcmp (optarg, this_emulation->name))
667 as_fatal (_("multiple emulation names specified"));
669 as_fatal (_("emulations not handled in this configuration"));
673 case OPTION_DUMPCONFIG:
674 fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS);
675 fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL);
676 fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU);
677 #ifdef TARGET_OBJ_FORMAT
678 fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT);
681 fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT);
685 case OPTION_COMPRESS_DEBUG:
688 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
689 if (strcasecmp (optarg, "none") == 0)
690 flag_compress_debug = COMPRESS_DEBUG_NONE;
691 else if (strcasecmp (optarg, "zlib") == 0)
692 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
693 else if (strcasecmp (optarg, "zlib-gnu") == 0)
694 flag_compress_debug = COMPRESS_DEBUG_GNU_ZLIB;
695 else if (strcasecmp (optarg, "zlib-gabi") == 0)
696 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
698 as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
701 as_fatal (_("--compress-debug-sections=%s is unsupported"),
706 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
709 case OPTION_NOCOMPRESS_DEBUG:
710 flag_compress_debug = COMPRESS_DEBUG_NONE;
713 case OPTION_DEBUG_PREFIX_MAP:
714 add_debug_prefix_map (optarg);
721 struct defsym_list *n;
723 for (s = optarg; *s != '\0' && *s != '='; s++)
726 as_fatal (_("bad defsym; format is --defsym name=value"));
728 i = bfd_scan_vma (s, (const char **) NULL, 0);
729 n = (struct defsym_list *) xmalloc (sizeof *n);
740 /* optarg is the name of the file containing the instruction
741 formats, opcodes, register names, etc. */
742 struct itbl_file_list *n;
746 as_warn (_("no file name following -t option"));
750 n = xmalloc (sizeof * n);
751 n->next = itbl_files;
755 /* Parse the file and add the new instructions to our internal
756 table. If multiple instruction tables are specified, the
757 information from this table gets appended onto the existing
759 itbl_files->name = xstrdup (optarg);
760 if (itbl_parse (itbl_files->name) != 0)
761 as_fatal (_("failed to read instruction table %s\n"),
768 start_dependencies (optarg);
772 /* Some backends, eg Alpha and Mips, use the -g switch for their
773 own purposes. So we check here for an explicit -g and allow
774 the backend to decide if it wants to process it. */
775 if ( old_argv[optind - 1][1] == 'g'
776 && md_parse_option (optc, optarg))
779 if (md_debug_format_selector)
780 debug_type = md_debug_format_selector (& use_gnu_debug_info_extensions);
782 debug_type = DEBUG_DWARF2;
784 debug_type = DEBUG_STABS;
787 case OPTION_GSTABS_PLUS:
788 use_gnu_debug_info_extensions = 1;
791 debug_type = DEBUG_STABS;
795 debug_type = DEBUG_DWARF2;
798 case OPTION_GDWARF_SECTIONS:
799 flag_dwarf_sections = TRUE;
803 flag_signed_overflow_ok = 1;
806 #ifndef WORKING_DOT_WORD
808 flag_warn_displacement = 1;
812 flag_keep_locals = 1;
815 case OPTION_LISTING_LHS_WIDTH:
816 listing_lhs_width = atoi (optarg);
817 if (listing_lhs_width_second < listing_lhs_width)
818 listing_lhs_width_second = listing_lhs_width;
820 case OPTION_LISTING_LHS_WIDTH2:
822 int tmp = atoi (optarg);
824 if (tmp > listing_lhs_width)
825 listing_lhs_width_second = tmp;
828 case OPTION_LISTING_RHS_WIDTH:
829 listing_rhs_width = atoi (optarg);
831 case OPTION_LISTING_CONT_LINES:
832 listing_lhs_cont_lines = atoi (optarg);
843 flag_readonly_data_in_text = 1;
847 flag_no_warnings = 1;
851 flag_no_warnings = 0;
852 flag_fatal_warnings = 0;
855 case OPTION_WARN_FATAL:
856 flag_no_warnings = 0;
857 flag_fatal_warnings = 1;
860 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
861 case OPTION_EXECSTACK:
863 flag_noexecstack = 0;
866 case OPTION_NOEXECSTACK:
867 flag_noexecstack = 1;
871 case OPTION_SIZE_CHECK:
872 if (strcasecmp (optarg, "error") == 0)
873 flag_size_check = size_check_error;
874 else if (strcasecmp (optarg, "warning") == 0)
875 flag_size_check = size_check_warning;
877 as_fatal (_("Invalid --size-check= option: `%s'"), optarg);
880 case OPTION_ELF_STT_COMMON:
881 if (strcasecmp (optarg, "no") == 0)
882 flag_use_elf_stt_common = 0;
883 else if (strcasecmp (optarg, "yes") == 0)
884 flag_use_elf_stt_common = 1;
886 as_fatal (_("Invalid --elf-stt-common= option: `%s'"),
890 case OPTION_SECTNAME_SUBST:
891 flag_sectname_subst = 1;
895 flag_always_generate_output = 1;
899 listing |= LISTING_LISTING;
901 listing_filename = xstrdup (optarg);
904 case OPTION_ALTERNATE:
905 optarg = old_argv [optind - 1];
906 while (* optarg == '-')
909 if (strcmp (optarg, "alternate") == 0)
911 flag_macro_alternate = 1;
920 if (optarg != old_argv[optind] && optarg[-1] == '=')
923 if (md_parse_option (optc, optarg) != 0)
931 listing |= LISTING_NOCOND;
934 listing |= LISTING_NODEBUG;
937 listing |= LISTING_GENERAL;
940 listing |= LISTING_HLL;
943 listing |= LISTING_LISTING;
946 listing |= LISTING_MACEXP;
949 listing |= LISTING_NOFORM;
952 listing |= LISTING_SYMBOLS;
955 listing_filename = xstrdup (optarg + 1);
956 optarg += strlen (listing_filename);
959 as_fatal (_("invalid listing option `%c'"), *optarg);
966 listing = LISTING_DEFAULT;
970 /* DEBUG is implemented: it debugs different
971 things from other people's assemblers. */
976 flag_no_comments = 1;
980 { /* Include file directory. */
981 char *temp = xstrdup (optarg);
983 add_include_dir (temp);
988 out_file_name = xstrdup (optarg);
995 /* -X means treat warnings as errors. */
998 case OPTION_REDUCE_MEMORY_OVERHEADS:
999 /* The only change we make at the moment is to reduce
1000 the size of the hash tables that we use. */
1001 set_gas_hash_table_size (4051);
1004 case OPTION_HASH_TABLE_SIZE:
1006 unsigned long new_size;
1008 new_size = strtoul (optarg, NULL, 0);
1010 set_gas_hash_table_size (new_size);
1012 as_fatal (_("--hash-size needs a numeric argument"));
1024 #ifdef md_after_parse_args
1025 md_after_parse_args ();
1030 dump_statistics (void)
1033 char *lim = (char *) sbrk (0);
1035 long run_time = get_run_time () - start_time;
1037 fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"),
1038 myname, run_time / 1000000, run_time % 1000000);
1040 fprintf (stderr, _("%s: data size %ld\n"),
1041 myname, (long) (lim - start_sbrk));
1044 subsegs_print_statistics (stderr);
1045 write_print_statistics (stderr);
1046 symbol_print_statistics (stderr);
1047 read_print_statistics (stderr);
1049 #ifdef tc_print_statistics
1050 tc_print_statistics (stderr);
1053 #ifdef obj_print_statistics
1054 obj_print_statistics (stderr);
1059 close_output_file (void)
1061 output_file_close (out_file_name);
1063 unlink_if_ordinary (out_file_name);
1066 /* The interface between the macro code and gas expression handling. */
1069 macro_expr (const char *emsg, size_t idx, sb *in, offsetT *val)
1076 hold = input_line_pointer;
1077 input_line_pointer = in->ptr + idx;
1078 expression_and_evaluate (&ex);
1079 idx = input_line_pointer - in->ptr;
1080 input_line_pointer = hold;
1082 if (ex.X_op != O_constant)
1083 as_bad ("%s", emsg);
1085 *val = ex.X_add_number;
1090 /* Here to attempt 1 pass over each input file.
1091 We scan argv[*] looking for filenames or exactly "" which is
1092 shorthand for stdin. Any argv that is NULL is not a file-name.
1093 We set need_pass_2 TRUE if, after this, we still have unresolved
1094 expressions of the form (unknown value)+-(unknown value).
1096 Note the un*x semantics: there is only 1 logical input file, but it
1097 may be a catenation of many 'physical' input files. */
1100 perform_an_assembly_pass (int argc, char ** argv)
1104 flagword applicable;
1110 /* Create the standard sections, and those the assembler uses
1112 text_section = subseg_new (TEXT_SECTION_NAME, 0);
1113 data_section = subseg_new (DATA_SECTION_NAME, 0);
1114 bss_section = subseg_new (BSS_SECTION_NAME, 0);
1115 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1116 to have relocs, otherwise we don't find out in time. */
1117 applicable = bfd_applicable_section_flags (stdoutput);
1118 bfd_set_section_flags (stdoutput, text_section,
1119 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1120 | SEC_CODE | SEC_READONLY));
1121 bfd_set_section_flags (stdoutput, data_section,
1122 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1124 bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC);
1125 seg_info (bss_section)->bss = 1;
1127 subseg_new (BFD_ABS_SECTION_NAME, 0);
1128 subseg_new (BFD_UND_SECTION_NAME, 0);
1129 reg_section = subseg_new ("*GAS `reg' section*", 0);
1130 expr_section = subseg_new ("*GAS `expr' section*", 0);
1133 subseg_set (text_section, 0);
1136 /* This may add symbol table entries, which requires having an open BFD,
1137 and sections already created. */
1154 { /* Is it a file-name argument? */
1157 /* argv->"" if stdin desired, else->filename. */
1158 read_a_source_file (*argv);
1160 argv++; /* Completed that argv. */
1163 read_a_source_file ("");
1168 main (int argc, char ** argv)
1170 char ** argv_orig = argv;
1174 start_time = get_run_time ();
1176 start_sbrk = (char *) sbrk (0);
1179 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
1180 setlocale (LC_MESSAGES, "");
1182 #if defined (HAVE_SETLOCALE)
1183 setlocale (LC_CTYPE, "");
1185 bindtextdomain (PACKAGE, LOCALEDIR);
1186 textdomain (PACKAGE);
1191 #ifdef HOST_SPECIAL_INIT
1192 HOST_SPECIAL_INIT (argc, argv);
1196 xmalloc_set_program_name (myname);
1198 expandargv (&argc, &argv);
1200 START_PROGRESS (myname, 0);
1202 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1203 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1206 out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
1210 bfd_set_error_program_name (myname);
1212 #ifdef USE_EMULATIONS
1213 select_emulation_mode (argc, argv);
1217 /* Call parse_args before any of the init/begin functions
1218 so that switches like --hash-size can be honored. */
1219 parse_args (&argc, &argv);
1224 input_scrub_begin ();
1227 /* It has to be called after dump_statistics (). */
1228 xatexit (close_output_file);
1230 if (flag_print_statistics)
1231 xatexit (dump_statistics);
1235 macro_strip_at = flag_mri;
1238 macro_init (flag_macro_alternate, flag_mri, macro_strip_at, macro_expr);
1242 output_file_create (out_file_name);
1243 gas_assert (stdoutput != 0);
1247 #ifdef tc_init_after_args
1248 tc_init_after_args ();
1255 local_symbol_make (".gasversion.", absolute_section,
1256 BFD_VERSION / 10000UL, &predefined_address_frag);
1258 /* Now that we have fully initialized, and have created the output
1259 file, define any symbols requested by --defsym command line
1261 while (defsyms != NULL)
1264 struct defsym_list *next;
1266 sym = symbol_new (defsyms->name, absolute_section, defsyms->value,
1267 &zero_address_frag);
1268 /* Make symbols defined on the command line volatile, so that they
1269 can be redefined inside a source file. This makes this assembler's
1270 behaviour compatible with earlier versions, but it may not be
1271 completely intuitive. */
1272 S_SET_VOLATILE (sym);
1273 symbol_table_insert (sym);
1274 next = defsyms->next;
1282 perform_an_assembly_pass (argc, argv);
1284 cond_finish_check (-1);
1290 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1291 if ((flag_execstack || flag_noexecstack)
1292 && OUTPUT_FLAVOR == bfd_target_elf_flavour)
1296 gnustack = subseg_new (".note.GNU-stack", 0);
1297 bfd_set_section_flags (stdoutput, gnustack,
1298 SEC_READONLY | (flag_execstack ? SEC_CODE : 0));
1303 /* If we've been collecting dwarf2 .debug_line info, either for
1304 assembly debugging or on behalf of the compiler, emit it now. */
1307 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1308 directives from the user or by the backend, emit it now. */
1312 if (seen_at_least_1_file ())
1314 int n_warns, n_errs;
1318 write_object_file ();
1320 n_warns = had_warnings ();
1321 n_errs = had_errors ();
1324 sprintf (warn_msg, _("%d warning"), n_warns);
1326 sprintf (warn_msg, _("%d warnings"), n_warns);
1328 sprintf (err_msg, _("%d error"), n_errs);
1330 sprintf (err_msg, _("%d errors"), n_errs);
1332 if (flag_fatal_warnings && n_warns != 0)
1335 as_bad (_("%s, treating warnings as errors"), warn_msg);
1341 else if (flag_always_generate_output)
1343 /* The -Z flag indicates that an object file should be generated,
1344 regardless of warnings and errors. */
1346 fprintf (stderr, _("%s, %s, generating bad object file\n"),
1354 listing_print (listing_filename, argv_orig);
1359 END_PROGRESS (myname);
1361 /* Use xexit instead of return, because under VMS environments they
1362 may not place the same interpretation on the value given. */
1363 if (had_errors () != 0)
1364 xexit (EXIT_FAILURE);
1366 /* Only generate dependency file if assembler was successful. */
1367 print_dependencies ();
1369 xexit (EXIT_SUCCESS);