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 /* Keep the output file. */
100 static int keep_it = 0;
108 /* Name of listing file. */
109 static char *listing_filename = NULL;
111 static struct defsym_list *defsyms;
114 /* Keep a record of the itbl files we read in. */
115 struct itbl_file_list
117 struct itbl_file_list *next;
120 static struct itbl_file_list *itbl_files;
123 static long start_time;
128 static int flag_macro_alternate;
131 #ifdef USE_EMULATIONS
132 #define EMULATION_ENVIRON "AS_EMULATION"
134 extern struct emulation mipsbelf, mipslelf, mipself;
135 extern struct emulation i386coff, i386elf, i386aout;
136 extern struct emulation crisaout, criself;
138 static struct emulation *const emulations[] = { EMULATIONS };
139 static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]);
142 select_emulation_mode (int argc, char **argv)
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 = "L0\001";
209 /* What other parameters should we test? */
210 this_emulation->fake_label_name = ".L0\001";
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 --sectname-subst enable section name substitution sequences\n"));
305 fprintf (stream, _("\
306 -f skip whitespace and comment preprocessing\n"));
307 fprintf (stream, _("\
308 -g --gen-debug generate debugging information\n"));
309 fprintf (stream, _("\
310 --gstabs generate STABS debugging information\n"));
311 fprintf (stream, _("\
312 --gstabs+ generate STABS debug info with GNU extensions\n"));
313 fprintf (stream, _("\
314 --gdwarf-2 generate DWARF2 debugging information\n"));
315 fprintf (stream, _("\
316 --gdwarf-sections generate per-function section names for DWARF line information\n"));
317 fprintf (stream, _("\
318 --hash-size=<value> set the hash table size close to <value>\n"));
319 fprintf (stream, _("\
320 --help show this message and exit\n"));
321 fprintf (stream, _("\
322 --target-help show target specific options\n"));
323 fprintf (stream, _("\
324 -I DIR add DIR to search list for .include directives\n"));
325 fprintf (stream, _("\
326 -J don't warn about signed overflow\n"));
327 fprintf (stream, _("\
328 -K warn when differences altered for long displacements\n"));
329 fprintf (stream, _("\
330 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
331 fprintf (stream, _("\
332 -M,--mri assemble in MRI compatibility mode\n"));
333 fprintf (stream, _("\
334 --MD FILE write dependency information in FILE (default none)\n"));
335 fprintf (stream, _("\
337 fprintf (stream, _("\
338 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
339 fprintf (stream, _("\
340 -R fold data section into text section\n"));
341 fprintf (stream, _("\
342 --reduce-memory-overheads \n\
343 prefer smaller memory use at the cost of longer\n\
345 fprintf (stream, _("\
346 --statistics print various measured statistics from execution\n"));
347 fprintf (stream, _("\
348 --strip-local-absolute strip local absolute symbols\n"));
349 fprintf (stream, _("\
350 --traditional-format Use same format as native assembler when possible\n"));
351 fprintf (stream, _("\
352 --version print assembler version number and exit\n"));
353 fprintf (stream, _("\
354 -W --no-warn suppress warnings\n"));
355 fprintf (stream, _("\
356 --warn don't suppress warnings\n"));
357 fprintf (stream, _("\
358 --fatal-warnings treat warnings as errors\n"));
360 fprintf (stream, _("\
361 --itbl INSTTBL extend instruction set to include instructions\n\
362 matching the specifications defined in file INSTTBL\n"));
364 fprintf (stream, _("\
366 fprintf (stream, _("\
368 fprintf (stream, _("\
369 -Z generate object file even after errors\n"));
370 fprintf (stream, _("\
371 --listing-lhs-width set the width in words of the output data column of\n\
373 fprintf (stream, _("\
374 --listing-lhs-width2 set the width in words of the continuation lines\n\
375 of the output data column; ignored if smaller than\n\
376 the width of the first line\n"));
377 fprintf (stream, _("\
378 --listing-rhs-width set the max width in characters of the lines from\n\
379 the source file\n"));
380 fprintf (stream, _("\
381 --listing-cont-lines set the maximum number of continuation lines used\n\
382 for the output data column of the listing\n"));
383 fprintf (stream, _("\
384 @FILE read options from FILE\n"));
386 md_show_usage (stream);
388 fputc ('\n', stream);
390 if (REPORT_BUGS_TO[0] && stream == stdout)
391 fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
394 /* Since it is easy to do here we interpret the special arg "-"
395 to mean "use stdin" and we set that argv[] pointing to "".
396 After we have munged argv[], the only things left are source file
397 name(s) and ""(s) denoting stdin. These file names are used
398 (perhaps more than once) later.
400 check for new machine-dep cmdline options in
401 md_parse_option definitions in config/tc-*.c. */
404 parse_args (int * pargc, char *** pargv)
410 /* Starting the short option string with '-' is for programs that
411 expect options and other ARGV-elements in any order and that care about
412 the ordering of the two. We describe each non-option ARGV-element
413 as if it were the argument of an option with character code 1. */
415 extern const char *md_shortopts;
416 static const char std_shortopts[] =
419 #ifndef WORKING_DOT_WORD
420 /* -K is not meaningful if .word is not being hacked. */
423 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
425 /* -v takes an argument on VMS, so we don't make it a generic
431 /* New option for extending instruction set (see also --itbl below). */
436 struct option *longopts;
437 extern struct option md_longopts[];
438 extern size_t md_longopts_size;
439 /* Codes used for the long options with no short synonyms. */
442 OPTION_HELP = OPTION_STD_BASE,
449 OPTION_DEBUG_PREFIX_MAP,
451 OPTION_LISTING_LHS_WIDTH,
452 OPTION_LISTING_LHS_WIDTH2,
453 OPTION_LISTING_RHS_WIDTH,
454 OPTION_LISTING_CONT_LINES,
459 OPTION_GDWARF_SECTIONS,
460 OPTION_STRIP_LOCAL_ABSOLUTE,
461 OPTION_TRADITIONAL_FORMAT,
467 OPTION_SECTNAME_SUBST,
470 OPTION_HASH_TABLE_SIZE,
471 OPTION_REDUCE_MEMORY_OVERHEADS,
473 OPTION_COMPRESS_DEBUG,
474 OPTION_NOCOMPRESS_DEBUG
475 /* When you add options here, check that they do
476 not collide with OPTION_MD_BASE. See as.h. */
479 static const struct option std_longopts[] =
481 /* Note: commas are placed at the start of the line rather than
482 the end of the preceding line so that it is simpler to
483 selectively add and remove lines from this list. */
484 {"alternate", no_argument, NULL, OPTION_ALTERNATE}
485 /* The entry for "a" is here to prevent getopt_long_only() from
486 considering that -a is an abbreviation for --alternate. This is
487 necessary because -a=<FILE> is a valid switch but getopt would
488 normally reject it since --alternate does not take an argument. */
489 ,{"a", optional_argument, NULL, 'a'}
490 /* Handle -al=<FILE>. */
491 ,{"al", optional_argument, NULL, OPTION_AL}
492 ,{"compress-debug-sections", optional_argument, NULL, OPTION_COMPRESS_DEBUG}
493 ,{"nocompress-debug-sections", no_argument, NULL, OPTION_NOCOMPRESS_DEBUG}
494 ,{"debug-prefix-map", required_argument, NULL, OPTION_DEBUG_PREFIX_MAP}
495 ,{"defsym", required_argument, NULL, OPTION_DEFSYM}
496 ,{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG}
497 ,{"emulation", required_argument, NULL, OPTION_EMULATION}
498 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
499 ,{"execstack", no_argument, NULL, OPTION_EXECSTACK}
500 ,{"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK}
501 ,{"size-check", required_argument, NULL, OPTION_SIZE_CHECK}
502 ,{"sectname-subst", no_argument, NULL, OPTION_SECTNAME_SUBST}
504 ,{"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL}
505 ,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF2}
506 /* GCC uses --gdwarf-2 but GAS uses to use --gdwarf2,
507 so we keep it here for backwards compatibility. */
508 ,{"gdwarf2", no_argument, NULL, OPTION_GDWARF2}
509 ,{"gdwarf-sections", no_argument, NULL, OPTION_GDWARF_SECTIONS}
510 ,{"gen-debug", no_argument, NULL, 'g'}
511 ,{"gstabs", no_argument, NULL, OPTION_GSTABS}
512 ,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS}
513 ,{"hash-size", required_argument, NULL, OPTION_HASH_TABLE_SIZE}
514 ,{"help", no_argument, NULL, OPTION_HELP}
516 /* New option for extending instruction set (see also -t above).
517 The "-t file" or "--itbl file" option extends the basic set of
518 valid instructions by reading "file", a text file containing a
519 list of instruction formats. The additional opcodes and their
520 formats are added to the built-in set of instructions, and
521 mnemonics for new registers may also be defined. */
522 ,{"itbl", required_argument, NULL, 't'}
524 /* getopt allows abbreviations, so we do this to stop it from
525 treating -k as an abbreviation for --keep-locals. Some
526 ports use -k to enable PIC assembly. */
527 ,{"keep-locals", no_argument, NULL, 'L'}
528 ,{"keep-locals", no_argument, NULL, 'L'}
529 ,{"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH}
530 ,{"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2}
531 ,{"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH}
532 ,{"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES}
533 ,{"MD", required_argument, NULL, OPTION_DEPFILE}
534 ,{"mri", no_argument, NULL, 'M'}
535 ,{"nocpp", no_argument, NULL, OPTION_NOCPP}
536 ,{"no-warn", no_argument, NULL, 'W'}
537 ,{"reduce-memory-overheads", no_argument, NULL, OPTION_REDUCE_MEMORY_OVERHEADS}
538 ,{"statistics", no_argument, NULL, OPTION_STATISTICS}
539 ,{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE}
540 ,{"version", no_argument, NULL, OPTION_VERSION}
541 ,{"verbose", no_argument, NULL, OPTION_VERBOSE}
542 ,{"target-help", no_argument, NULL, OPTION_TARGET_HELP}
543 ,{"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT}
544 ,{"warn", no_argument, NULL, OPTION_WARN}
547 /* Construct the option lists from the standard list and the target
548 dependent list. Include space for an extra NULL option and
549 always NULL terminate. */
550 shortopts = concat (std_shortopts, md_shortopts, (char *) NULL);
551 longopts = (struct option *) xmalloc (sizeof (std_longopts)
552 + md_longopts_size + sizeof (struct option));
553 memcpy (longopts, std_longopts, sizeof (std_longopts));
554 memcpy (((char *) longopts) + sizeof (std_longopts), md_longopts, md_longopts_size);
555 memset (((char *) longopts) + sizeof (std_longopts) + md_longopts_size,
556 0, sizeof (struct option));
558 /* Make a local copy of the old argv. */
562 /* Initialize a new argv that contains no options. */
563 new_argv = (char **) xmalloc (sizeof (char *) * (old_argc + 1));
564 new_argv[0] = old_argv[0];
566 new_argv[new_argc] = NULL;
570 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
571 indicate a long option. */
573 int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts,
582 /* md_parse_option should return 1 if it recognizes optc,
584 if (md_parse_option (optc, optarg) != 0)
586 /* `-v' isn't included in the general short_opts list, so check for
587 it explicitly here before deciding we've gotten a bad argument. */
591 /* Telling getopt to treat -v's value as optional can result
592 in it picking up a following filename argument here. The
593 VMS code in md_parse_option can return 0 in that case,
594 but it has no way of pushing the filename argument back. */
595 if (optarg && *optarg)
596 new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL;
607 as_bad (_("unrecognized option -%c%s"), optc, optarg ? optarg : "");
613 case 1: /* File name. */
614 if (!strcmp (optarg, "-"))
616 new_argv[new_argc++] = optarg;
617 new_argv[new_argc] = NULL;
620 case OPTION_TARGET_HELP:
621 md_show_usage (stdout);
631 case OPTION_STATISTICS:
632 flag_print_statistics = 1;
635 case OPTION_STRIP_LOCAL_ABSOLUTE:
636 flag_strip_local_absolute = 1;
639 case OPTION_TRADITIONAL_FORMAT:
640 flag_traditional_format = 1;
644 /* This output is intended to follow the GNU standards document. */
645 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING);
646 printf (_("Copyright (C) 2016 Free Software Foundation, Inc.\n"));
648 This program is free software; you may redistribute it under the terms of\n\
649 the GNU General Public License version 3 or later.\n\
650 This program has absolutely no warranty.\n"));
651 printf (_("This assembler was configured for a target of `%s'.\n"),
655 case OPTION_EMULATION:
656 #ifdef USE_EMULATIONS
657 if (strcmp (optarg, this_emulation->name))
658 as_fatal (_("multiple emulation names specified"));
660 as_fatal (_("emulations not handled in this configuration"));
664 case OPTION_DUMPCONFIG:
665 fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS);
666 fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL);
667 fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU);
668 #ifdef TARGET_OBJ_FORMAT
669 fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT);
672 fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT);
676 case OPTION_COMPRESS_DEBUG:
679 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
680 if (strcasecmp (optarg, "none") == 0)
681 flag_compress_debug = COMPRESS_DEBUG_NONE;
682 else if (strcasecmp (optarg, "zlib") == 0)
683 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
684 else if (strcasecmp (optarg, "zlib-gnu") == 0)
685 flag_compress_debug = COMPRESS_DEBUG_GNU_ZLIB;
686 else if (strcasecmp (optarg, "zlib-gabi") == 0)
687 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
689 as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
692 as_fatal (_("--compress-debug-sections=%s is unsupported"),
697 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
700 case OPTION_NOCOMPRESS_DEBUG:
701 flag_compress_debug = COMPRESS_DEBUG_NONE;
704 case OPTION_DEBUG_PREFIX_MAP:
705 add_debug_prefix_map (optarg);
712 struct defsym_list *n;
714 for (s = optarg; *s != '\0' && *s != '='; s++)
717 as_fatal (_("bad defsym; format is --defsym name=value"));
719 i = bfd_scan_vma (s, (const char **) NULL, 0);
720 n = (struct defsym_list *) xmalloc (sizeof *n);
731 /* optarg is the name of the file containing the instruction
732 formats, opcodes, register names, etc. */
733 struct itbl_file_list *n;
737 as_warn (_("no file name following -t option"));
741 n = xmalloc (sizeof * n);
742 n->next = itbl_files;
746 /* Parse the file and add the new instructions to our internal
747 table. If multiple instruction tables are specified, the
748 information from this table gets appended onto the existing
750 itbl_files->name = xstrdup (optarg);
751 if (itbl_parse (itbl_files->name) != 0)
752 as_fatal (_("failed to read instruction table %s\n"),
759 start_dependencies (optarg);
763 /* Some backends, eg Alpha and Mips, use the -g switch for their
764 own purposes. So we check here for an explicit -g and allow
765 the backend to decide if it wants to process it. */
766 if ( old_argv[optind - 1][1] == 'g'
767 && md_parse_option (optc, optarg))
770 if (md_debug_format_selector)
771 debug_type = md_debug_format_selector (& use_gnu_debug_info_extensions);
773 debug_type = DEBUG_DWARF2;
775 debug_type = DEBUG_STABS;
778 case OPTION_GSTABS_PLUS:
779 use_gnu_debug_info_extensions = 1;
782 debug_type = DEBUG_STABS;
786 debug_type = DEBUG_DWARF2;
789 case OPTION_GDWARF_SECTIONS:
790 flag_dwarf_sections = TRUE;
794 flag_signed_overflow_ok = 1;
797 #ifndef WORKING_DOT_WORD
799 flag_warn_displacement = 1;
803 flag_keep_locals = 1;
806 case OPTION_LISTING_LHS_WIDTH:
807 listing_lhs_width = atoi (optarg);
808 if (listing_lhs_width_second < listing_lhs_width)
809 listing_lhs_width_second = listing_lhs_width;
811 case OPTION_LISTING_LHS_WIDTH2:
813 int tmp = atoi (optarg);
815 if (tmp > listing_lhs_width)
816 listing_lhs_width_second = tmp;
819 case OPTION_LISTING_RHS_WIDTH:
820 listing_rhs_width = atoi (optarg);
822 case OPTION_LISTING_CONT_LINES:
823 listing_lhs_cont_lines = atoi (optarg);
834 flag_readonly_data_in_text = 1;
838 flag_no_warnings = 1;
842 flag_no_warnings = 0;
843 flag_fatal_warnings = 0;
846 case OPTION_WARN_FATAL:
847 flag_no_warnings = 0;
848 flag_fatal_warnings = 1;
851 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
852 case OPTION_EXECSTACK:
854 flag_noexecstack = 0;
857 case OPTION_NOEXECSTACK:
858 flag_noexecstack = 1;
862 case OPTION_SIZE_CHECK:
863 if (strcasecmp (optarg, "error") == 0)
864 flag_size_check = size_check_error;
865 else if (strcasecmp (optarg, "warning") == 0)
866 flag_size_check = size_check_warning;
868 as_fatal (_("Invalid --size-check= option: `%s'"), optarg);
871 case OPTION_SECTNAME_SUBST:
872 flag_sectname_subst = 1;
876 flag_always_generate_output = 1;
880 listing |= LISTING_LISTING;
882 listing_filename = xstrdup (optarg);
885 case OPTION_ALTERNATE:
886 optarg = old_argv [optind - 1];
887 while (* optarg == '-')
890 if (strcmp (optarg, "alternate") == 0)
892 flag_macro_alternate = 1;
901 if (optarg != old_argv[optind] && optarg[-1] == '=')
904 if (md_parse_option (optc, optarg) != 0)
912 listing |= LISTING_NOCOND;
915 listing |= LISTING_NODEBUG;
918 listing |= LISTING_GENERAL;
921 listing |= LISTING_HLL;
924 listing |= LISTING_LISTING;
927 listing |= LISTING_MACEXP;
930 listing |= LISTING_NOFORM;
933 listing |= LISTING_SYMBOLS;
936 listing_filename = xstrdup (optarg + 1);
937 optarg += strlen (listing_filename);
940 as_fatal (_("invalid listing option `%c'"), *optarg);
947 listing = LISTING_DEFAULT;
951 /* DEBUG is implemented: it debugs different
952 things from other people's assemblers. */
957 flag_no_comments = 1;
961 { /* Include file directory. */
962 char *temp = xstrdup (optarg);
964 add_include_dir (temp);
969 out_file_name = xstrdup (optarg);
976 /* -X means treat warnings as errors. */
979 case OPTION_REDUCE_MEMORY_OVERHEADS:
980 /* The only change we make at the moment is to reduce
981 the size of the hash tables that we use. */
982 set_gas_hash_table_size (4051);
985 case OPTION_HASH_TABLE_SIZE:
987 unsigned long new_size;
989 new_size = strtoul (optarg, NULL, 0);
991 set_gas_hash_table_size (new_size);
993 as_fatal (_("--hash-size needs a numeric argument"));
1005 #ifdef md_after_parse_args
1006 md_after_parse_args ();
1011 dump_statistics (void)
1014 char *lim = (char *) sbrk (0);
1016 long run_time = get_run_time () - start_time;
1018 fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"),
1019 myname, run_time / 1000000, run_time % 1000000);
1021 fprintf (stderr, _("%s: data size %ld\n"),
1022 myname, (long) (lim - start_sbrk));
1025 subsegs_print_statistics (stderr);
1026 write_print_statistics (stderr);
1027 symbol_print_statistics (stderr);
1028 read_print_statistics (stderr);
1030 #ifdef tc_print_statistics
1031 tc_print_statistics (stderr);
1034 #ifdef obj_print_statistics
1035 obj_print_statistics (stderr);
1040 close_output_file (void)
1042 output_file_close (out_file_name);
1044 unlink_if_ordinary (out_file_name);
1047 /* The interface between the macro code and gas expression handling. */
1050 macro_expr (const char *emsg, size_t idx, sb *in, offsetT *val)
1057 hold = input_line_pointer;
1058 input_line_pointer = in->ptr + idx;
1059 expression_and_evaluate (&ex);
1060 idx = input_line_pointer - in->ptr;
1061 input_line_pointer = hold;
1063 if (ex.X_op != O_constant)
1064 as_bad ("%s", emsg);
1066 *val = ex.X_add_number;
1071 /* Here to attempt 1 pass over each input file.
1072 We scan argv[*] looking for filenames or exactly "" which is
1073 shorthand for stdin. Any argv that is NULL is not a file-name.
1074 We set need_pass_2 TRUE if, after this, we still have unresolved
1075 expressions of the form (unknown value)+-(unknown value).
1077 Note the un*x semantics: there is only 1 logical input file, but it
1078 may be a catenation of many 'physical' input files. */
1081 perform_an_assembly_pass (int argc, char ** argv)
1085 flagword applicable;
1091 /* Create the standard sections, and those the assembler uses
1093 text_section = subseg_new (TEXT_SECTION_NAME, 0);
1094 data_section = subseg_new (DATA_SECTION_NAME, 0);
1095 bss_section = subseg_new (BSS_SECTION_NAME, 0);
1096 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1097 to have relocs, otherwise we don't find out in time. */
1098 applicable = bfd_applicable_section_flags (stdoutput);
1099 bfd_set_section_flags (stdoutput, text_section,
1100 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1101 | SEC_CODE | SEC_READONLY));
1102 bfd_set_section_flags (stdoutput, data_section,
1103 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1105 bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC);
1106 seg_info (bss_section)->bss = 1;
1108 subseg_new (BFD_ABS_SECTION_NAME, 0);
1109 subseg_new (BFD_UND_SECTION_NAME, 0);
1110 reg_section = subseg_new ("*GAS `reg' section*", 0);
1111 expr_section = subseg_new ("*GAS `expr' section*", 0);
1114 subseg_set (text_section, 0);
1117 /* This may add symbol table entries, which requires having an open BFD,
1118 and sections already created. */
1135 { /* Is it a file-name argument? */
1138 /* argv->"" if stdin desired, else->filename. */
1139 read_a_source_file (*argv);
1141 argv++; /* Completed that argv. */
1144 read_a_source_file ("");
1149 main (int argc, char ** argv)
1151 char ** argv_orig = argv;
1155 start_time = get_run_time ();
1157 start_sbrk = (char *) sbrk (0);
1160 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
1161 setlocale (LC_MESSAGES, "");
1163 #if defined (HAVE_SETLOCALE)
1164 setlocale (LC_CTYPE, "");
1166 bindtextdomain (PACKAGE, LOCALEDIR);
1167 textdomain (PACKAGE);
1172 #ifdef HOST_SPECIAL_INIT
1173 HOST_SPECIAL_INIT (argc, argv);
1177 xmalloc_set_program_name (myname);
1179 expandargv (&argc, &argv);
1181 START_PROGRESS (myname, 0);
1183 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1184 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1187 out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
1191 bfd_set_error_program_name (myname);
1193 #ifdef USE_EMULATIONS
1194 select_emulation_mode (argc, argv);
1198 /* Call parse_args before any of the init/begin functions
1199 so that switches like --hash-size can be honored. */
1200 parse_args (&argc, &argv);
1205 input_scrub_begin ();
1208 /* It has to be called after dump_statistics (). */
1209 xatexit (close_output_file);
1211 if (flag_print_statistics)
1212 xatexit (dump_statistics);
1216 macro_strip_at = flag_mri;
1219 macro_init (flag_macro_alternate, flag_mri, macro_strip_at, macro_expr);
1223 output_file_create (out_file_name);
1224 gas_assert (stdoutput != 0);
1228 #ifdef tc_init_after_args
1229 tc_init_after_args ();
1236 local_symbol_make (".gasversion.", absolute_section,
1237 BFD_VERSION / 10000UL, &predefined_address_frag);
1239 /* Now that we have fully initialized, and have created the output
1240 file, define any symbols requested by --defsym command line
1242 while (defsyms != NULL)
1245 struct defsym_list *next;
1247 sym = symbol_new (defsyms->name, absolute_section, defsyms->value,
1248 &zero_address_frag);
1249 /* Make symbols defined on the command line volatile, so that they
1250 can be redefined inside a source file. This makes this assembler's
1251 behaviour compatible with earlier versions, but it may not be
1252 completely intuitive. */
1253 S_SET_VOLATILE (sym);
1254 symbol_table_insert (sym);
1255 next = defsyms->next;
1263 perform_an_assembly_pass (argc, argv);
1265 cond_finish_check (-1);
1271 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1272 if ((flag_execstack || flag_noexecstack)
1273 && OUTPUT_FLAVOR == bfd_target_elf_flavour)
1277 gnustack = subseg_new (".note.GNU-stack", 0);
1278 bfd_set_section_flags (stdoutput, gnustack,
1279 SEC_READONLY | (flag_execstack ? SEC_CODE : 0));
1284 /* If we've been collecting dwarf2 .debug_line info, either for
1285 assembly debugging or on behalf of the compiler, emit it now. */
1288 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1289 directives from the user or by the backend, emit it now. */
1293 if (seen_at_least_1_file ())
1295 int n_warns, n_errs;
1299 write_object_file ();
1301 n_warns = had_warnings ();
1302 n_errs = had_errors ();
1305 sprintf (warn_msg, _("%d warning"), n_warns);
1307 sprintf (warn_msg, _("%d warnings"), n_warns);
1309 sprintf (err_msg, _("%d error"), n_errs);
1311 sprintf (err_msg, _("%d errors"), n_errs);
1313 if (flag_fatal_warnings && n_warns != 0)
1316 as_bad (_("%s, treating warnings as errors"), warn_msg);
1322 else if (flag_always_generate_output)
1324 /* The -Z flag indicates that an object file should be generated,
1325 regardless of warnings and errors. */
1327 fprintf (stderr, _("%s, %s, generating bad object file\n"),
1335 listing_print (listing_filename, argv_orig);
1340 END_PROGRESS (myname);
1342 /* Use xexit instead of return, because under VMS environments they
1343 may not place the same interpretation on the value given. */
1344 if (had_errors () != 0)
1345 xexit (EXIT_FAILURE);
1347 /* Only generate dependency file if assembler was successful. */
1348 print_dependencies ();
1350 xexit (EXIT_SUCCESS);