1 /* as.c - GAS main program.
2 Copyright 1987-2013 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. */
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 mipsbecoff, mipslecoff, mipsecoff;
136 extern struct emulation i386coff, i386elf, i386aout;
137 extern struct emulation crisaout, criself;
139 static struct emulation *const emulations[] = { EMULATIONS };
140 static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]);
143 select_emulation_mode (int argc, char **argv)
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);
229 show_usage (FILE * stream)
231 fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname);
233 fprintf (stream, _("\
235 -a[sub-option...] turn on listings\n\
236 Sub-options [default hls]:\n\
237 c omit false conditionals\n\
238 d omit debugging directives\n\
239 g include general info\n\
240 h include high-level source\n\
241 l include assembly\n\
242 m include macro expansions\n\
243 n omit forms processing\n\
245 =FILE list to FILE (must be last sub-option)\n"));
247 fprintf (stream, _("\
248 --alternate initially turn on alternate macro syntax\n"));
250 fprintf (stream, _("\
251 --compress-debug-sections\n\
252 compress DWARF debug sections using zlib\n"));
253 fprintf (stream, _("\
254 --nocompress-debug-sections\n\
255 don't compress DWARF debug sections\n"));
256 #endif /* HAVE_ZLIB_H */
257 fprintf (stream, _("\
258 -D produce assembler debugging messages\n"));
259 fprintf (stream, _("\
260 --debug-prefix-map OLD=NEW\n\
261 map OLD to NEW in debug information\n"));
262 fprintf (stream, _("\
263 --defsym SYM=VAL define symbol SYM to given value\n"));
264 #ifdef USE_EMULATIONS
271 for (i = 0; i < n_emulations - 1; i++)
272 fprintf (stream, "%s | ", emulations[i]->name);
273 fprintf (stream, "%s]\n", emulations[i]->name);
275 def_em = getenv (EMULATION_ENVIRON);
277 def_em = DEFAULT_EMULATION;
278 fprintf (stream, _("\
279 emulate output (default %s)\n"), def_em);
282 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
283 fprintf (stream, _("\
284 --execstack require executable stack for this object\n"));
285 fprintf (stream, _("\
286 --noexecstack don't require executable stack for this object\n"));
287 fprintf (stream, _("\
288 --size-check=[error|warning]\n\
289 ELF .size directive check (default --size-check=error)\n"));
291 fprintf (stream, _("\
292 -f skip whitespace and comment preprocessing\n"));
293 fprintf (stream, _("\
294 -g --gen-debug generate debugging information\n"));
295 fprintf (stream, _("\
296 --gstabs generate STABS debugging information\n"));
297 fprintf (stream, _("\
298 --gstabs+ generate STABS debug info with GNU extensions\n"));
299 fprintf (stream, _("\
300 --gdwarf-2 generate DWARF2 debugging information\n"));
301 fprintf (stream, _("\
302 --gdwarf-sections generate per-function section names for DWARF line information\n"));
303 fprintf (stream, _("\
304 --hash-size=<value> set the hash table size close to <value>\n"));
305 fprintf (stream, _("\
306 --help show this message and exit\n"));
307 fprintf (stream, _("\
308 --target-help show target specific options\n"));
309 fprintf (stream, _("\
310 -I DIR add DIR to search list for .include directives\n"));
311 fprintf (stream, _("\
312 -J don't warn about signed overflow\n"));
313 fprintf (stream, _("\
314 -K warn when differences altered for long displacements\n"));
315 fprintf (stream, _("\
316 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
317 fprintf (stream, _("\
318 -M,--mri assemble in MRI compatibility mode\n"));
319 fprintf (stream, _("\
320 --MD FILE write dependency information in FILE (default none)\n"));
321 fprintf (stream, _("\
323 fprintf (stream, _("\
324 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
325 fprintf (stream, _("\
326 -R fold data section into text section\n"));
327 fprintf (stream, _("\
328 --reduce-memory-overheads \n\
329 prefer smaller memory use at the cost of longer\n\
331 fprintf (stream, _("\
332 --statistics print various measured statistics from execution\n"));
333 fprintf (stream, _("\
334 --strip-local-absolute strip local absolute symbols\n"));
335 fprintf (stream, _("\
336 --traditional-format Use same format as native assembler when possible\n"));
337 fprintf (stream, _("\
338 --version print assembler version number and exit\n"));
339 fprintf (stream, _("\
340 -W --no-warn suppress warnings\n"));
341 fprintf (stream, _("\
342 --warn don't suppress warnings\n"));
343 fprintf (stream, _("\
344 --fatal-warnings treat warnings as errors\n"));
346 fprintf (stream, _("\
347 --itbl INSTTBL extend instruction set to include instructions\n\
348 matching the specifications defined in file INSTTBL\n"));
350 fprintf (stream, _("\
352 fprintf (stream, _("\
354 fprintf (stream, _("\
355 -Z generate object file even after errors\n"));
356 fprintf (stream, _("\
357 --listing-lhs-width set the width in words of the output data column of\n\
359 fprintf (stream, _("\
360 --listing-lhs-width2 set the width in words of the continuation lines\n\
361 of the output data column; ignored if smaller than\n\
362 the width of the first line\n"));
363 fprintf (stream, _("\
364 --listing-rhs-width set the max width in characters of the lines from\n\
365 the source file\n"));
366 fprintf (stream, _("\
367 --listing-cont-lines set the maximum number of continuation lines used\n\
368 for the output data column of the listing\n"));
369 fprintf (stream, _("\
370 @FILE read options from FILE\n"));
372 md_show_usage (stream);
374 fputc ('\n', stream);
376 if (REPORT_BUGS_TO[0] && stream == stdout)
377 fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
380 /* Since it is easy to do here we interpret the special arg "-"
381 to mean "use stdin" and we set that argv[] pointing to "".
382 After we have munged argv[], the only things left are source file
383 name(s) and ""(s) denoting stdin. These file names are used
384 (perhaps more than once) later.
386 check for new machine-dep cmdline options in
387 md_parse_option definitions in config/tc-*.c. */
390 parse_args (int * pargc, char *** pargv)
396 /* Starting the short option string with '-' is for programs that
397 expect options and other ARGV-elements in any order and that care about
398 the ordering of the two. We describe each non-option ARGV-element
399 as if it were the argument of an option with character code 1. */
401 extern const char *md_shortopts;
402 static const char std_shortopts[] =
405 #ifndef WORKING_DOT_WORD
406 /* -K is not meaningful if .word is not being hacked. */
409 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
411 /* -v takes an argument on VMS, so we don't make it a generic
417 /* New option for extending instruction set (see also --itbl below). */
422 struct option *longopts;
423 extern struct option md_longopts[];
424 extern size_t md_longopts_size;
425 /* Codes used for the long options with no short synonyms. */
428 OPTION_HELP = OPTION_STD_BASE,
435 OPTION_DEBUG_PREFIX_MAP,
437 OPTION_LISTING_LHS_WIDTH,
438 OPTION_LISTING_LHS_WIDTH2,
439 OPTION_LISTING_RHS_WIDTH,
440 OPTION_LISTING_CONT_LINES,
445 OPTION_GDWARF_SECTIONS,
446 OPTION_STRIP_LOCAL_ABSOLUTE,
447 OPTION_TRADITIONAL_FORMAT,
455 OPTION_HASH_TABLE_SIZE,
456 OPTION_REDUCE_MEMORY_OVERHEADS,
458 OPTION_COMPRESS_DEBUG,
459 OPTION_NOCOMPRESS_DEBUG
460 /* When you add options here, check that they do
461 not collide with OPTION_MD_BASE. See as.h. */
464 static const struct option std_longopts[] =
466 /* Note: commas are placed at the start of the line rather than
467 the end of the preceding line so that it is simpler to
468 selectively add and remove lines from this list. */
469 {"alternate", no_argument, NULL, OPTION_ALTERNATE}
470 /* The entry for "a" is here to prevent getopt_long_only() from
471 considering that -a is an abbreviation for --alternate. This is
472 necessary because -a=<FILE> is a valid switch but getopt would
473 normally reject it since --alternate does not take an argument. */
474 ,{"a", optional_argument, NULL, 'a'}
475 /* Handle -al=<FILE>. */
476 ,{"al", optional_argument, NULL, OPTION_AL}
477 ,{"compress-debug-sections", no_argument, NULL, OPTION_COMPRESS_DEBUG}
478 ,{"nocompress-debug-sections", no_argument, NULL, OPTION_NOCOMPRESS_DEBUG}
479 ,{"debug-prefix-map", required_argument, NULL, OPTION_DEBUG_PREFIX_MAP}
480 ,{"defsym", required_argument, NULL, OPTION_DEFSYM}
481 ,{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG}
482 ,{"emulation", required_argument, NULL, OPTION_EMULATION}
483 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
484 ,{"execstack", no_argument, NULL, OPTION_EXECSTACK}
485 ,{"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK}
486 ,{"size-check", required_argument, NULL, OPTION_SIZE_CHECK}
488 ,{"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL}
489 ,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF2}
490 /* GCC uses --gdwarf-2 but GAS uses to use --gdwarf2,
491 so we keep it here for backwards compatibility. */
492 ,{"gdwarf2", no_argument, NULL, OPTION_GDWARF2}
493 ,{"gdwarf-sections", no_argument, NULL, OPTION_GDWARF_SECTIONS}
494 ,{"gen-debug", no_argument, NULL, 'g'}
495 ,{"gstabs", no_argument, NULL, OPTION_GSTABS}
496 ,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS}
497 ,{"hash-size", required_argument, NULL, OPTION_HASH_TABLE_SIZE}
498 ,{"help", no_argument, NULL, OPTION_HELP}
500 /* New option for extending instruction set (see also -t above).
501 The "-t file" or "--itbl file" option extends the basic set of
502 valid instructions by reading "file", a text file containing a
503 list of instruction formats. The additional opcodes and their
504 formats are added to the built-in set of instructions, and
505 mnemonics for new registers may also be defined. */
506 ,{"itbl", required_argument, NULL, 't'}
508 /* getopt allows abbreviations, so we do this to stop it from
509 treating -k as an abbreviation for --keep-locals. Some
510 ports use -k to enable PIC assembly. */
511 ,{"keep-locals", no_argument, NULL, 'L'}
512 ,{"keep-locals", no_argument, NULL, 'L'}
513 ,{"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH}
514 ,{"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2}
515 ,{"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH}
516 ,{"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES}
517 ,{"MD", required_argument, NULL, OPTION_DEPFILE}
518 ,{"mri", no_argument, NULL, 'M'}
519 ,{"nocpp", no_argument, NULL, OPTION_NOCPP}
520 ,{"no-warn", no_argument, NULL, 'W'}
521 ,{"reduce-memory-overheads", no_argument, NULL, OPTION_REDUCE_MEMORY_OVERHEADS}
522 ,{"statistics", no_argument, NULL, OPTION_STATISTICS}
523 ,{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE}
524 ,{"version", no_argument, NULL, OPTION_VERSION}
525 ,{"verbose", no_argument, NULL, OPTION_VERBOSE}
526 ,{"target-help", no_argument, NULL, OPTION_TARGET_HELP}
527 ,{"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT}
528 ,{"warn", no_argument, NULL, OPTION_WARN}
531 /* Construct the option lists from the standard list and the target
532 dependent list. Include space for an extra NULL option and
533 always NULL terminate. */
534 shortopts = concat (std_shortopts, md_shortopts, (char *) NULL);
535 longopts = (struct option *) xmalloc (sizeof (std_longopts)
536 + md_longopts_size + sizeof (struct option));
537 memcpy (longopts, std_longopts, sizeof (std_longopts));
538 memcpy (((char *) longopts) + sizeof (std_longopts), md_longopts, md_longopts_size);
539 memset (((char *) longopts) + sizeof (std_longopts) + md_longopts_size,
540 0, sizeof (struct option));
542 /* Make a local copy of the old argv. */
546 /* Initialize a new argv that contains no options. */
547 new_argv = (char **) xmalloc (sizeof (char *) * (old_argc + 1));
548 new_argv[0] = old_argv[0];
550 new_argv[new_argc] = NULL;
554 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
555 indicate a long option. */
557 int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts,
566 /* md_parse_option should return 1 if it recognizes optc,
568 if (md_parse_option (optc, optarg) != 0)
570 /* `-v' isn't included in the general short_opts list, so check for
571 it explicitly here before deciding we've gotten a bad argument. */
575 /* Telling getopt to treat -v's value as optional can result
576 in it picking up a following filename argument here. The
577 VMS code in md_parse_option can return 0 in that case,
578 but it has no way of pushing the filename argument back. */
579 if (optarg && *optarg)
580 new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL;
591 as_bad (_("unrecognized option -%c%s"), optc, optarg ? optarg : "");
597 case 1: /* File name. */
598 if (!strcmp (optarg, "-"))
600 new_argv[new_argc++] = optarg;
601 new_argv[new_argc] = NULL;
604 case OPTION_TARGET_HELP:
605 md_show_usage (stdout);
615 case OPTION_STATISTICS:
616 flag_print_statistics = 1;
619 case OPTION_STRIP_LOCAL_ABSOLUTE:
620 flag_strip_local_absolute = 1;
623 case OPTION_TRADITIONAL_FORMAT:
624 flag_traditional_format = 1;
628 /* This output is intended to follow the GNU standards document. */
629 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING);
630 printf (_("Copyright 2013 Free Software Foundation, Inc.\n"));
632 This program is free software; you may redistribute it under the terms of\n\
633 the GNU General Public License version 3 or later.\n\
634 This program has absolutely no warranty.\n"));
635 printf (_("This assembler was configured for a target of `%s'.\n"),
639 case OPTION_EMULATION:
640 #ifdef USE_EMULATIONS
641 if (strcmp (optarg, this_emulation->name))
642 as_fatal (_("multiple emulation names specified"));
644 as_fatal (_("emulations not handled in this configuration"));
648 case OPTION_DUMPCONFIG:
649 fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS);
650 fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL);
651 fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU);
652 #ifdef TARGET_OBJ_FORMAT
653 fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT);
656 fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT);
660 case OPTION_COMPRESS_DEBUG:
662 flag_compress_debug = 1;
664 as_warn (_("cannot compress debug sections (zlib not installed)"));
665 #endif /* HAVE_ZLIB_H */
668 case OPTION_NOCOMPRESS_DEBUG:
669 flag_compress_debug = 0;
672 case OPTION_DEBUG_PREFIX_MAP:
673 add_debug_prefix_map (optarg);
680 struct defsym_list *n;
682 for (s = optarg; *s != '\0' && *s != '='; s++)
685 as_fatal (_("bad defsym; format is --defsym name=value"));
687 i = bfd_scan_vma (s, (const char **) NULL, 0);
688 n = (struct defsym_list *) xmalloc (sizeof *n);
699 /* optarg is the name of the file containing the instruction
700 formats, opcodes, register names, etc. */
701 struct itbl_file_list *n;
705 as_warn (_("no file name following -t option"));
709 n = xmalloc (sizeof * n);
710 n->next = itbl_files;
714 /* Parse the file and add the new instructions to our internal
715 table. If multiple instruction tables are specified, the
716 information from this table gets appended onto the existing
718 itbl_files->name = xstrdup (optarg);
719 if (itbl_parse (itbl_files->name) != 0)
720 as_fatal (_("failed to read instruction table %s\n"),
727 start_dependencies (optarg);
731 /* Some backends, eg Alpha and Mips, use the -g switch for their
732 own purposes. So we check here for an explicit -g and allow
733 the backend to decide if it wants to process it. */
734 if ( old_argv[optind - 1][1] == 'g'
735 && md_parse_option (optc, optarg))
738 if (md_debug_format_selector)
739 debug_type = md_debug_format_selector (& use_gnu_debug_info_extensions);
741 debug_type = DEBUG_DWARF2;
743 debug_type = DEBUG_STABS;
746 case OPTION_GSTABS_PLUS:
747 use_gnu_debug_info_extensions = 1;
750 debug_type = DEBUG_STABS;
754 debug_type = DEBUG_DWARF2;
757 case OPTION_GDWARF_SECTIONS:
758 flag_dwarf_sections = TRUE;
762 flag_signed_overflow_ok = 1;
765 #ifndef WORKING_DOT_WORD
767 flag_warn_displacement = 1;
771 flag_keep_locals = 1;
774 case OPTION_LISTING_LHS_WIDTH:
775 listing_lhs_width = atoi (optarg);
776 if (listing_lhs_width_second < listing_lhs_width)
777 listing_lhs_width_second = listing_lhs_width;
779 case OPTION_LISTING_LHS_WIDTH2:
781 int tmp = atoi (optarg);
783 if (tmp > listing_lhs_width)
784 listing_lhs_width_second = tmp;
787 case OPTION_LISTING_RHS_WIDTH:
788 listing_rhs_width = atoi (optarg);
790 case OPTION_LISTING_CONT_LINES:
791 listing_lhs_cont_lines = atoi (optarg);
802 flag_readonly_data_in_text = 1;
806 flag_no_warnings = 1;
810 flag_no_warnings = 0;
811 flag_fatal_warnings = 0;
814 case OPTION_WARN_FATAL:
815 flag_no_warnings = 0;
816 flag_fatal_warnings = 1;
819 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
820 case OPTION_EXECSTACK:
822 flag_noexecstack = 0;
825 case OPTION_NOEXECSTACK:
826 flag_noexecstack = 1;
830 case OPTION_SIZE_CHECK:
831 if (strcasecmp (optarg, "error") == 0)
832 flag_size_check = size_check_error;
833 else if (strcasecmp (optarg, "warning") == 0)
834 flag_size_check = size_check_warning;
836 as_fatal (_("Invalid --size-check= option: `%s'"), optarg);
840 flag_always_generate_output = 1;
844 listing |= LISTING_LISTING;
846 listing_filename = xstrdup (optarg);
849 case OPTION_ALTERNATE:
850 optarg = old_argv [optind - 1];
851 while (* optarg == '-')
854 if (strcmp (optarg, "alternate") == 0)
856 flag_macro_alternate = 1;
865 if (optarg != old_argv[optind] && optarg[-1] == '=')
868 if (md_parse_option (optc, optarg) != 0)
876 listing |= LISTING_NOCOND;
879 listing |= LISTING_NODEBUG;
882 listing |= LISTING_GENERAL;
885 listing |= LISTING_HLL;
888 listing |= LISTING_LISTING;
891 listing |= LISTING_MACEXP;
894 listing |= LISTING_NOFORM;
897 listing |= LISTING_SYMBOLS;
900 listing_filename = xstrdup (optarg + 1);
901 optarg += strlen (listing_filename);
904 as_fatal (_("invalid listing option `%c'"), *optarg);
911 listing = LISTING_DEFAULT;
915 /* DEBUG is implemented: it debugs different
916 things from other people's assemblers. */
921 flag_no_comments = 1;
925 { /* Include file directory. */
926 char *temp = xstrdup (optarg);
928 add_include_dir (temp);
933 out_file_name = xstrdup (optarg);
940 /* -X means treat warnings as errors. */
943 case OPTION_REDUCE_MEMORY_OVERHEADS:
944 /* The only change we make at the moment is to reduce
945 the size of the hash tables that we use. */
946 set_gas_hash_table_size (4051);
949 case OPTION_HASH_TABLE_SIZE:
951 unsigned long new_size;
953 new_size = strtoul (optarg, NULL, 0);
955 set_gas_hash_table_size (new_size);
957 as_fatal (_("--hash-size needs a numeric argument"));
969 #ifdef md_after_parse_args
970 md_after_parse_args ();
975 dump_statistics (void)
978 char *lim = (char *) sbrk (0);
980 long run_time = get_run_time () - start_time;
982 fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"),
983 myname, run_time / 1000000, run_time % 1000000);
985 fprintf (stderr, _("%s: data size %ld\n"),
986 myname, (long) (lim - start_sbrk));
989 subsegs_print_statistics (stderr);
990 write_print_statistics (stderr);
991 symbol_print_statistics (stderr);
992 read_print_statistics (stderr);
994 #ifdef tc_print_statistics
995 tc_print_statistics (stderr);
998 #ifdef obj_print_statistics
999 obj_print_statistics (stderr);
1004 close_output_file (void)
1006 output_file_close (out_file_name);
1008 unlink_if_ordinary (out_file_name);
1011 /* The interface between the macro code and gas expression handling. */
1014 macro_expr (const char *emsg, size_t idx, sb *in, offsetT *val)
1021 hold = input_line_pointer;
1022 input_line_pointer = in->ptr + idx;
1023 expression_and_evaluate (&ex);
1024 idx = input_line_pointer - in->ptr;
1025 input_line_pointer = hold;
1027 if (ex.X_op != O_constant)
1028 as_bad ("%s", emsg);
1030 *val = ex.X_add_number;
1035 /* Here to attempt 1 pass over each input file.
1036 We scan argv[*] looking for filenames or exactly "" which is
1037 shorthand for stdin. Any argv that is NULL is not a file-name.
1038 We set need_pass_2 TRUE if, after this, we still have unresolved
1039 expressions of the form (unknown value)+-(unknown value).
1041 Note the un*x semantics: there is only 1 logical input file, but it
1042 may be a catenation of many 'physical' input files. */
1045 perform_an_assembly_pass (int argc, char ** argv)
1049 flagword applicable;
1055 /* Create the standard sections, and those the assembler uses
1057 text_section = subseg_new (TEXT_SECTION_NAME, 0);
1058 data_section = subseg_new (DATA_SECTION_NAME, 0);
1059 bss_section = subseg_new (BSS_SECTION_NAME, 0);
1060 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1061 to have relocs, otherwise we don't find out in time. */
1062 applicable = bfd_applicable_section_flags (stdoutput);
1063 bfd_set_section_flags (stdoutput, text_section,
1064 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1065 | SEC_CODE | SEC_READONLY));
1066 bfd_set_section_flags (stdoutput, data_section,
1067 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1069 bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC);
1070 seg_info (bss_section)->bss = 1;
1072 subseg_new (BFD_ABS_SECTION_NAME, 0);
1073 subseg_new (BFD_UND_SECTION_NAME, 0);
1074 reg_section = subseg_new ("*GAS `reg' section*", 0);
1075 expr_section = subseg_new ("*GAS `expr' section*", 0);
1078 subseg_set (text_section, 0);
1081 /* This may add symbol table entries, which requires having an open BFD,
1082 and sections already created. */
1099 { /* Is it a file-name argument? */
1102 /* argv->"" if stdin desired, else->filename. */
1103 read_a_source_file (*argv);
1105 argv++; /* Completed that argv. */
1108 read_a_source_file ("");
1113 create_obj_attrs_section (void)
1120 size = bfd_elf_obj_attr_size (stdoutput);
1123 name = get_elf_backend_data (stdoutput)->obj_attrs_section;
1125 name = ".gnu.attributes";
1126 s = subseg_new (name, 0);
1127 elf_section_type (s)
1128 = get_elf_backend_data (stdoutput)->obj_attrs_section_type;
1129 bfd_set_section_flags (stdoutput, s, SEC_READONLY | SEC_DATA);
1131 p = frag_more (size);
1132 bfd_elf_set_obj_attr_contents (stdoutput, (bfd_byte *)p, size);
1139 main (int argc, char ** argv)
1141 char ** argv_orig = argv;
1145 start_time = get_run_time ();
1147 start_sbrk = (char *) sbrk (0);
1150 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
1151 setlocale (LC_MESSAGES, "");
1153 #if defined (HAVE_SETLOCALE)
1154 setlocale (LC_CTYPE, "");
1156 bindtextdomain (PACKAGE, LOCALEDIR);
1157 textdomain (PACKAGE);
1162 #ifdef HOST_SPECIAL_INIT
1163 HOST_SPECIAL_INIT (argc, argv);
1167 xmalloc_set_program_name (myname);
1169 expandargv (&argc, &argv);
1171 START_PROGRESS (myname, 0);
1173 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1174 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1177 out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
1181 bfd_set_error_program_name (myname);
1183 #ifdef USE_EMULATIONS
1184 select_emulation_mode (argc, argv);
1188 /* Call parse_args before any of the init/begin functions
1189 so that switches like --hash-size can be honored. */
1190 parse_args (&argc, &argv);
1195 input_scrub_begin ();
1198 /* It has to be called after dump_statistics (). */
1199 xatexit (close_output_file);
1201 if (flag_print_statistics)
1202 xatexit (dump_statistics);
1206 macro_strip_at = flag_mri;
1209 macro_init (flag_macro_alternate, flag_mri, macro_strip_at, macro_expr);
1213 output_file_create (out_file_name);
1214 gas_assert (stdoutput != 0);
1218 #ifdef tc_init_after_args
1219 tc_init_after_args ();
1226 local_symbol_make (".gasversion.", absolute_section,
1227 BFD_VERSION / 10000UL, &predefined_address_frag);
1229 /* Now that we have fully initialized, and have created the output
1230 file, define any symbols requested by --defsym command line
1232 while (defsyms != NULL)
1235 struct defsym_list *next;
1237 sym = symbol_new (defsyms->name, absolute_section, defsyms->value,
1238 &zero_address_frag);
1239 /* Make symbols defined on the command line volatile, so that they
1240 can be redefined inside a source file. This makes this assembler's
1241 behaviour compatible with earlier versions, but it may not be
1242 completely intuitive. */
1243 S_SET_VOLATILE (sym);
1244 symbol_table_insert (sym);
1245 next = defsyms->next;
1253 perform_an_assembly_pass (argc, argv);
1255 cond_finish_check (-1);
1263 create_obj_attrs_section ();
1266 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1267 if ((flag_execstack || flag_noexecstack)
1268 && OUTPUT_FLAVOR == bfd_target_elf_flavour)
1272 gnustack = subseg_new (".note.GNU-stack", 0);
1273 bfd_set_section_flags (stdoutput, gnustack,
1274 SEC_READONLY | (flag_execstack ? SEC_CODE : 0));
1279 /* If we've been collecting dwarf2 .debug_line info, either for
1280 assembly debugging or on behalf of the compiler, emit it now. */
1283 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1284 directives from the user or by the backend, emit it now. */
1287 if (seen_at_least_1_file ()
1288 && (flag_always_generate_output || had_errors () == 0))
1293 /* This used to be done at the start of write_object_file in
1294 write.c, but that caused problems when doing listings when
1295 keep_it was zero. This could probably be moved above md_end, but
1296 I didn't want to risk the change. */
1300 write_object_file ();
1305 listing_print (listing_filename, argv_orig);
1308 if (flag_fatal_warnings && had_warnings () > 0 && had_errors () == 0)
1309 as_bad (_("%d warnings, treating warnings as errors"), had_warnings ());
1311 if (had_errors () > 0 && ! flag_always_generate_output)
1316 END_PROGRESS (myname);
1318 /* Use xexit instead of return, because under VMS environments they
1319 may not place the same interpretation on the value given. */
1320 if (had_errors () > 0)
1321 xexit (EXIT_FAILURE);
1323 /* Only generate dependency file if assembler was successful. */
1324 print_dependencies ();
1326 xexit (EXIT_SUCCESS);