1 /* as.c - GAS main program.
2 Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
5 Free Software Foundation, Inc.
7 This file is part of GAS, the GNU Assembler.
9 GAS is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GAS is distributed in the hope that it will be useful, but WITHOUT
15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
17 License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GAS; see the file COPYING. If not, write to the Free
21 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
24 /* Main program for AS; a 32-bit assembler of GNU.
25 Understands command arguments.
26 Has a few routines that don't fit in other modules because they
32 Since no-one else says they will support them in future: I
33 don't support them now. */
39 #include "output-file.h"
42 #include "dwarf2dbg.h"
43 #include "dw2gencfi.h"
53 #ifdef NEED_DECLARATION_SBRK
59 /* Perform any cgen specific initialisation for gas. */
60 extern void gas_cgen_begin (void);
63 /* We build a list of defsyms as we read the options, and then define
64 them after we have initialized everything. */
67 struct defsym_list
*next
;
73 /* True if a listing is wanted. */
76 /* Type of debugging to generate. */
77 enum debug_info_type debug_type
= DEBUG_UNSPECIFIED
;
78 int use_gnu_debug_info_extensions
= 0;
80 #ifndef MD_DEBUG_FORMAT_SELECTOR
81 #define MD_DEBUG_FORMAT_SELECTOR NULL
83 static enum debug_info_type (*md_debug_format_selector
) (int *) = MD_DEBUG_FORMAT_SELECTOR
;
85 /* Maximum level of macro nesting. */
86 int max_macro_nest
= 100;
91 /* The default obstack chunk size. If we set this to zero, the
92 obstack code will use whatever will fit in a 4096 byte block. */
95 /* To monitor memory allocation more effectively, make this non-zero.
96 Then the chunk sizes for gas and bfd will be reduced. */
99 /* Enable verbose mode. */
102 /* Keep the output file. */
111 /* Name of listing file. */
112 static char *listing_filename
= NULL
;
114 static struct defsym_list
*defsyms
;
117 /* Keep a record of the itbl files we read in. */
118 struct itbl_file_list
120 struct itbl_file_list
*next
;
123 static struct itbl_file_list
*itbl_files
;
126 static long start_time
;
131 static int flag_macro_alternate
;
134 #ifdef USE_EMULATIONS
135 #define EMULATION_ENVIRON "AS_EMULATION"
137 extern struct emulation mipsbelf
, mipslelf
, mipself
;
138 extern struct emulation mipsbecoff
, mipslecoff
, mipsecoff
;
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
)
151 for (i
= 1; i
< argc
; i
++)
152 if (!strncmp ("--em", argv
[i
], 4))
158 p
= strchr (argv
[i
], '=');
165 as_fatal (_("missing emulation mode name"));
170 em
= getenv (EMULATION_ENVIRON
);
172 em
= DEFAULT_EMULATION
;
176 for (i
= 0; i
< n_emulations
; i
++)
177 if (!strcmp (emulations
[i
]->name
, em
))
179 if (i
== n_emulations
)
180 as_fatal (_("unrecognized emulation name `%s'"), em
);
181 this_emulation
= emulations
[i
];
184 this_emulation
= emulations
[0];
186 this_emulation
->init ();
190 default_emul_bfd_name (void)
197 common_emul_init (void)
199 this_format
= this_emulation
->format
;
201 if (this_emulation
->leading_underscore
== 2)
202 this_emulation
->leading_underscore
= this_format
->dfl_leading_underscore
;
204 if (this_emulation
->default_endian
!= 2)
205 target_big_endian
= this_emulation
->default_endian
;
207 if (this_emulation
->fake_label_name
== 0)
209 if (this_emulation
->leading_underscore
)
210 this_emulation
->fake_label_name
= "L0\001";
212 /* What other parameters should we test? */
213 this_emulation
->fake_label_name
= ".L0\001";
219 print_version_id (void)
227 fprintf (stderr
, _("GNU assembler version %s (%s) using BFD version %s\n"),
228 VERSION
, TARGET_ALIAS
, BFD_VERSION_STRING
);
232 show_usage (FILE * stream
)
234 fprintf (stream
, _("Usage: %s [option...] [asmfile...]\n"), myname
);
236 fprintf (stream
, _("\
238 -a[sub-option...] turn on listings\n\
239 Sub-options [default hls]:\n\
240 c omit false conditionals\n\
241 d omit debugging directives\n\
242 g include general info\n\
243 h include high-level source\n\
244 l include assembly\n\
245 m include macro expansions\n\
246 n omit forms processing\n\
248 =FILE list to FILE (must be last sub-option)\n"));
250 fprintf (stream
, _("\
251 --alternate initially turn on alternate macro syntax\n"));
253 fprintf (stream
, _("\
254 --compress-debug-sections\n\
255 compress DWARF debug sections using zlib\n"));
256 fprintf (stream
, _("\
257 --nocompress-debug-sections\n\
258 don't compress DWARF debug sections\n"));
259 #endif /* HAVE_ZLIB_H */
260 fprintf (stream
, _("\
261 -D produce assembler debugging messages\n"));
262 fprintf (stream
, _("\
263 --debug-prefix-map OLD=NEW\n\
264 map OLD to NEW in debug information\n"));
265 fprintf (stream
, _("\
266 --defsym SYM=VAL define symbol SYM to given value\n"));
267 #ifdef USE_EMULATIONS
274 for (i
= 0; i
< n_emulations
- 1; i
++)
275 fprintf (stream
, "%s | ", emulations
[i
]->name
);
276 fprintf (stream
, "%s]\n", emulations
[i
]->name
);
278 def_em
= getenv (EMULATION_ENVIRON
);
280 def_em
= DEFAULT_EMULATION
;
281 fprintf (stream
, _("\
282 emulate output (default %s)\n"), def_em
);
285 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
286 fprintf (stream
, _("\
287 --execstack require executable stack for this object\n"));
288 fprintf (stream
, _("\
289 --noexecstack don't require executable stack for this object\n"));
290 fprintf (stream
, _("\
291 --size-check=[error|warning]\n\
292 ELF .size directive check (default --size-check=error)\n"));
294 fprintf (stream
, _("\
295 -f skip whitespace and comment preprocessing\n"));
296 fprintf (stream
, _("\
297 -g --gen-debug generate debugging information\n"));
298 fprintf (stream
, _("\
299 --gstabs generate STABS debugging information\n"));
300 fprintf (stream
, _("\
301 --gstabs+ generate STABS debug info with GNU extensions\n"));
302 fprintf (stream
, _("\
303 --gdwarf-2 generate DWARF2 debugging information\n"));
304 fprintf (stream
, _("\
305 --hash-size=<value> set the hash table size close to <value>\n"));
306 fprintf (stream
, _("\
307 --help show this message and exit\n"));
308 fprintf (stream
, _("\
309 --target-help show target specific options\n"));
310 fprintf (stream
, _("\
311 -I DIR add DIR to search list for .include directives\n"));
312 fprintf (stream
, _("\
313 -J don't warn about signed overflow\n"));
314 fprintf (stream
, _("\
315 -K warn when differences altered for long displacements\n"));
316 fprintf (stream
, _("\
317 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
318 fprintf (stream
, _("\
319 -M,--mri assemble in MRI compatibility mode\n"));
320 fprintf (stream
, _("\
321 --MD FILE write dependency information in FILE (default none)\n"));
322 fprintf (stream
, _("\
324 fprintf (stream
, _("\
325 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
326 fprintf (stream
, _("\
327 -R fold data section into text section\n"));
328 fprintf (stream
, _("\
329 --reduce-memory-overheads \n\
330 prefer smaller memory use at the cost of longer\n\
332 fprintf (stream
, _("\
333 --statistics print various measured statistics from execution\n"));
334 fprintf (stream
, _("\
335 --strip-local-absolute strip local absolute symbols\n"));
336 fprintf (stream
, _("\
337 --traditional-format Use same format as native assembler when possible\n"));
338 fprintf (stream
, _("\
339 --version print assembler version number and exit\n"));
340 fprintf (stream
, _("\
341 -W --no-warn suppress warnings\n"));
342 fprintf (stream
, _("\
343 --warn don't suppress warnings\n"));
344 fprintf (stream
, _("\
345 --fatal-warnings treat warnings as errors\n"));
347 fprintf (stream
, _("\
348 --itbl INSTTBL extend instruction set to include instructions\n\
349 matching the specifications defined in file INSTTBL\n"));
351 fprintf (stream
, _("\
353 fprintf (stream
, _("\
355 fprintf (stream
, _("\
356 -Z generate object file even after errors\n"));
357 fprintf (stream
, _("\
358 --listing-lhs-width set the width in words of the output data column of\n\
360 fprintf (stream
, _("\
361 --listing-lhs-width2 set the width in words of the continuation lines\n\
362 of the output data column; ignored if smaller than\n\
363 the width of the first line\n"));
364 fprintf (stream
, _("\
365 --listing-rhs-width set the max width in characters of the lines from\n\
366 the source file\n"));
367 fprintf (stream
, _("\
368 --listing-cont-lines set the maximum number of continuation lines used\n\
369 for the output data column of the listing\n"));
370 fprintf (stream
, _("\
371 @FILE read options from FILE\n"));
373 md_show_usage (stream
);
375 fputc ('\n', stream
);
377 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
378 fprintf (stream
, _("Report bugs to %s\n"), REPORT_BUGS_TO
);
381 /* Since it is easy to do here we interpret the special arg "-"
382 to mean "use stdin" and we set that argv[] pointing to "".
383 After we have munged argv[], the only things left are source file
384 name(s) and ""(s) denoting stdin. These file names are used
385 (perhaps more than once) later.
387 check for new machine-dep cmdline options in
388 md_parse_option definitions in config/tc-*.c. */
391 parse_args (int * pargc
, char *** pargv
)
397 /* Starting the short option string with '-' is for programs that
398 expect options and other ARGV-elements in any order and that care about
399 the ordering of the two. We describe each non-option ARGV-element
400 as if it were the argument of an option with character code 1. */
402 extern const char *md_shortopts
;
403 static const char std_shortopts
[] =
406 #ifndef WORKING_DOT_WORD
407 /* -K is not meaningful if .word is not being hacked. */
410 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
412 /* -v takes an argument on VMS, so we don't make it a generic
418 /* New option for extending instruction set (see also --itbl below). */
423 struct option
*longopts
;
424 extern struct option md_longopts
[];
425 extern size_t md_longopts_size
;
426 /* Codes used for the long options with no short synonyms. */
429 OPTION_HELP
= OPTION_STD_BASE
,
436 OPTION_DEBUG_PREFIX_MAP
,
438 OPTION_LISTING_LHS_WIDTH
,
439 OPTION_LISTING_LHS_WIDTH2
,
440 OPTION_LISTING_RHS_WIDTH
,
441 OPTION_LISTING_CONT_LINES
,
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 ,{"gen-debug", no_argument
, NULL
, 'g'}
494 ,{"gstabs", no_argument
, NULL
, OPTION_GSTABS
}
495 ,{"gstabs+", no_argument
, NULL
, OPTION_GSTABS_PLUS
}
496 ,{"hash-size", required_argument
, NULL
, OPTION_HASH_TABLE_SIZE
}
497 ,{"help", no_argument
, NULL
, OPTION_HELP
}
499 /* New option for extending instruction set (see also -t above).
500 The "-t file" or "--itbl file" option extends the basic set of
501 valid instructions by reading "file", a text file containing a
502 list of instruction formats. The additional opcodes and their
503 formats are added to the built-in set of instructions, and
504 mnemonics for new registers may also be defined. */
505 ,{"itbl", required_argument
, NULL
, 't'}
507 /* getopt allows abbreviations, so we do this to stop it from
508 treating -k as an abbreviation for --keep-locals. Some
509 ports use -k to enable PIC assembly. */
510 ,{"keep-locals", no_argument
, NULL
, 'L'}
511 ,{"keep-locals", no_argument
, NULL
, 'L'}
512 ,{"listing-lhs-width", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH
}
513 ,{"listing-lhs-width2", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH2
}
514 ,{"listing-rhs-width", required_argument
, NULL
, OPTION_LISTING_RHS_WIDTH
}
515 ,{"listing-cont-lines", required_argument
, NULL
, OPTION_LISTING_CONT_LINES
}
516 ,{"MD", required_argument
, NULL
, OPTION_DEPFILE
}
517 ,{"mri", no_argument
, NULL
, 'M'}
518 ,{"nocpp", no_argument
, NULL
, OPTION_NOCPP
}
519 ,{"no-warn", no_argument
, NULL
, 'W'}
520 ,{"reduce-memory-overheads", no_argument
, NULL
, OPTION_REDUCE_MEMORY_OVERHEADS
}
521 ,{"statistics", no_argument
, NULL
, OPTION_STATISTICS
}
522 ,{"strip-local-absolute", no_argument
, NULL
, OPTION_STRIP_LOCAL_ABSOLUTE
}
523 ,{"version", no_argument
, NULL
, OPTION_VERSION
}
524 ,{"verbose", no_argument
, NULL
, OPTION_VERBOSE
}
525 ,{"target-help", no_argument
, NULL
, OPTION_TARGET_HELP
}
526 ,{"traditional-format", no_argument
, NULL
, OPTION_TRADITIONAL_FORMAT
}
527 ,{"warn", no_argument
, NULL
, OPTION_WARN
}
530 /* Construct the option lists from the standard list and the target
531 dependent list. Include space for an extra NULL option and
532 always NULL terminate. */
533 shortopts
= concat (std_shortopts
, md_shortopts
, (char *) NULL
);
534 longopts
= (struct option
*) xmalloc (sizeof (std_longopts
)
535 + md_longopts_size
+ sizeof (struct option
));
536 memcpy (longopts
, std_longopts
, sizeof (std_longopts
));
537 memcpy (((char *) longopts
) + sizeof (std_longopts
), md_longopts
, md_longopts_size
);
538 memset (((char *) longopts
) + sizeof (std_longopts
) + md_longopts_size
,
539 0, sizeof (struct option
));
541 /* Make a local copy of the old argv. */
545 /* Initialize a new argv that contains no options. */
546 new_argv
= (char **) xmalloc (sizeof (char *) * (old_argc
+ 1));
547 new_argv
[0] = old_argv
[0];
549 new_argv
[new_argc
] = NULL
;
553 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
554 indicate a long option. */
556 int optc
= getopt_long_only (old_argc
, old_argv
, shortopts
, longopts
,
565 /* md_parse_option should return 1 if it recognizes optc,
567 if (md_parse_option (optc
, optarg
) != 0)
569 /* `-v' isn't included in the general short_opts list, so check for
570 it explicitly here before deciding we've gotten a bad argument. */
574 /* Telling getopt to treat -v's value as optional can result
575 in it picking up a following filename argument here. The
576 VMS code in md_parse_option can return 0 in that case,
577 but it has no way of pushing the filename argument back. */
578 if (optarg
&& *optarg
)
579 new_argv
[new_argc
++] = optarg
, new_argv
[new_argc
] = NULL
;
590 as_bad (_("unrecognized option -%c%s"), optc
, optarg
? optarg
: "");
596 case 1: /* File name. */
597 if (!strcmp (optarg
, "-"))
599 new_argv
[new_argc
++] = optarg
;
600 new_argv
[new_argc
] = NULL
;
603 case OPTION_TARGET_HELP
:
604 md_show_usage (stdout
);
614 case OPTION_STATISTICS
:
615 flag_print_statistics
= 1;
618 case OPTION_STRIP_LOCAL_ABSOLUTE
:
619 flag_strip_local_absolute
= 1;
622 case OPTION_TRADITIONAL_FORMAT
:
623 flag_traditional_format
= 1;
627 /* This output is intended to follow the GNU standards document. */
628 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING
);
629 printf (_("Copyright 2013 Free Software Foundation, Inc.\n"));
631 This program is free software; you may redistribute it under the terms of\n\
632 the GNU General Public License version 3 or later.\n\
633 This program has absolutely no warranty.\n"));
634 printf (_("This assembler was configured for a target of `%s'.\n"),
638 case OPTION_EMULATION
:
639 #ifdef USE_EMULATIONS
640 if (strcmp (optarg
, this_emulation
->name
))
641 as_fatal (_("multiple emulation names specified"));
643 as_fatal (_("emulations not handled in this configuration"));
647 case OPTION_DUMPCONFIG
:
648 fprintf (stderr
, _("alias = %s\n"), TARGET_ALIAS
);
649 fprintf (stderr
, _("canonical = %s\n"), TARGET_CANONICAL
);
650 fprintf (stderr
, _("cpu-type = %s\n"), TARGET_CPU
);
651 #ifdef TARGET_OBJ_FORMAT
652 fprintf (stderr
, _("format = %s\n"), TARGET_OBJ_FORMAT
);
655 fprintf (stderr
, _("bfd-target = %s\n"), TARGET_FORMAT
);
659 case OPTION_COMPRESS_DEBUG
:
661 flag_compress_debug
= 1;
663 as_warn (_("cannot compress debug sections (zlib not installed)"));
664 #endif /* HAVE_ZLIB_H */
667 case OPTION_NOCOMPRESS_DEBUG
:
668 flag_compress_debug
= 0;
671 case OPTION_DEBUG_PREFIX_MAP
:
672 add_debug_prefix_map (optarg
);
679 struct defsym_list
*n
;
681 for (s
= optarg
; *s
!= '\0' && *s
!= '='; s
++)
684 as_fatal (_("bad defsym; format is --defsym name=value"));
686 i
= bfd_scan_vma (s
, (const char **) NULL
, 0);
687 n
= (struct defsym_list
*) xmalloc (sizeof *n
);
698 /* optarg is the name of the file containing the instruction
699 formats, opcodes, register names, etc. */
700 struct itbl_file_list
*n
;
704 as_warn (_("no file name following -t option"));
708 n
= xmalloc (sizeof * n
);
709 n
->next
= itbl_files
;
713 /* Parse the file and add the new instructions to our internal
714 table. If multiple instruction tables are specified, the
715 information from this table gets appended onto the existing
717 itbl_files
->name
= xstrdup (optarg
);
718 if (itbl_parse (itbl_files
->name
) != 0)
719 as_fatal (_("failed to read instruction table %s\n"),
726 start_dependencies (optarg
);
730 /* Some backends, eg Alpha and Mips, use the -g switch for their
731 own purposes. So we check here for an explicit -g and allow
732 the backend to decide if it wants to process it. */
733 if ( old_argv
[optind
- 1][1] == 'g'
734 && md_parse_option (optc
, optarg
))
737 if (md_debug_format_selector
)
738 debug_type
= md_debug_format_selector (& use_gnu_debug_info_extensions
);
740 debug_type
= DEBUG_DWARF2
;
742 debug_type
= DEBUG_STABS
;
745 case OPTION_GSTABS_PLUS
:
746 use_gnu_debug_info_extensions
= 1;
749 debug_type
= DEBUG_STABS
;
753 debug_type
= DEBUG_DWARF2
;
757 flag_signed_overflow_ok
= 1;
760 #ifndef WORKING_DOT_WORD
762 flag_warn_displacement
= 1;
766 flag_keep_locals
= 1;
769 case OPTION_LISTING_LHS_WIDTH
:
770 listing_lhs_width
= atoi (optarg
);
771 if (listing_lhs_width_second
< listing_lhs_width
)
772 listing_lhs_width_second
= listing_lhs_width
;
774 case OPTION_LISTING_LHS_WIDTH2
:
776 int tmp
= atoi (optarg
);
778 if (tmp
> listing_lhs_width
)
779 listing_lhs_width_second
= tmp
;
782 case OPTION_LISTING_RHS_WIDTH
:
783 listing_rhs_width
= atoi (optarg
);
785 case OPTION_LISTING_CONT_LINES
:
786 listing_lhs_cont_lines
= atoi (optarg
);
797 flag_readonly_data_in_text
= 1;
801 flag_no_warnings
= 1;
805 flag_no_warnings
= 0;
806 flag_fatal_warnings
= 0;
809 case OPTION_WARN_FATAL
:
810 flag_no_warnings
= 0;
811 flag_fatal_warnings
= 1;
814 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
815 case OPTION_EXECSTACK
:
817 flag_noexecstack
= 0;
820 case OPTION_NOEXECSTACK
:
821 flag_noexecstack
= 1;
825 case OPTION_SIZE_CHECK
:
826 if (strcasecmp (optarg
, "error") == 0)
827 flag_size_check
= size_check_error
;
828 else if (strcasecmp (optarg
, "warning") == 0)
829 flag_size_check
= size_check_warning
;
831 as_fatal (_("Invalid --size-check= option: `%s'"), optarg
);
835 flag_always_generate_output
= 1;
839 listing
|= LISTING_LISTING
;
841 listing_filename
= xstrdup (optarg
);
844 case OPTION_ALTERNATE
:
845 optarg
= old_argv
[optind
- 1];
846 while (* optarg
== '-')
849 if (strcmp (optarg
, "alternate") == 0)
851 flag_macro_alternate
= 1;
860 if (optarg
!= old_argv
[optind
] && optarg
[-1] == '=')
863 if (md_parse_option (optc
, optarg
) != 0)
871 listing
|= LISTING_NOCOND
;
874 listing
|= LISTING_NODEBUG
;
877 listing
|= LISTING_GENERAL
;
880 listing
|= LISTING_HLL
;
883 listing
|= LISTING_LISTING
;
886 listing
|= LISTING_MACEXP
;
889 listing
|= LISTING_NOFORM
;
892 listing
|= LISTING_SYMBOLS
;
895 listing_filename
= xstrdup (optarg
+ 1);
896 optarg
+= strlen (listing_filename
);
899 as_fatal (_("invalid listing option `%c'"), *optarg
);
906 listing
= LISTING_DEFAULT
;
910 /* DEBUG is implemented: it debugs different
911 things from other people's assemblers. */
916 flag_no_comments
= 1;
920 { /* Include file directory. */
921 char *temp
= xstrdup (optarg
);
923 add_include_dir (temp
);
928 out_file_name
= xstrdup (optarg
);
935 /* -X means treat warnings as errors. */
938 case OPTION_REDUCE_MEMORY_OVERHEADS
:
939 /* The only change we make at the moment is to reduce
940 the size of the hash tables that we use. */
941 set_gas_hash_table_size (4051);
944 case OPTION_HASH_TABLE_SIZE
:
946 unsigned long new_size
;
948 new_size
= strtoul (optarg
, NULL
, 0);
950 set_gas_hash_table_size (new_size
);
952 as_fatal (_("--hash-size needs a numeric argument"));
964 #ifdef md_after_parse_args
965 md_after_parse_args ();
970 dump_statistics (void)
973 char *lim
= (char *) sbrk (0);
975 long run_time
= get_run_time () - start_time
;
977 fprintf (stderr
, _("%s: total time in assembly: %ld.%06ld\n"),
978 myname
, run_time
/ 1000000, run_time
% 1000000);
980 fprintf (stderr
, _("%s: data size %ld\n"),
981 myname
, (long) (lim
- start_sbrk
));
984 subsegs_print_statistics (stderr
);
985 write_print_statistics (stderr
);
986 symbol_print_statistics (stderr
);
987 read_print_statistics (stderr
);
989 #ifdef tc_print_statistics
990 tc_print_statistics (stderr
);
993 #ifdef obj_print_statistics
994 obj_print_statistics (stderr
);
999 close_output_file (void)
1001 output_file_close (out_file_name
);
1003 unlink_if_ordinary (out_file_name
);
1006 /* The interface between the macro code and gas expression handling. */
1009 macro_expr (const char *emsg
, size_t idx
, sb
*in
, offsetT
*val
)
1016 hold
= input_line_pointer
;
1017 input_line_pointer
= in
->ptr
+ idx
;
1018 expression_and_evaluate (&ex
);
1019 idx
= input_line_pointer
- in
->ptr
;
1020 input_line_pointer
= hold
;
1022 if (ex
.X_op
!= O_constant
)
1023 as_bad ("%s", emsg
);
1025 *val
= ex
.X_add_number
;
1030 /* Here to attempt 1 pass over each input file.
1031 We scan argv[*] looking for filenames or exactly "" which is
1032 shorthand for stdin. Any argv that is NULL is not a file-name.
1033 We set need_pass_2 TRUE if, after this, we still have unresolved
1034 expressions of the form (unknown value)+-(unknown value).
1036 Note the un*x semantics: there is only 1 logical input file, but it
1037 may be a catenation of many 'physical' input files. */
1040 perform_an_assembly_pass (int argc
, char ** argv
)
1044 flagword applicable
;
1050 /* Create the standard sections, and those the assembler uses
1052 text_section
= subseg_new (TEXT_SECTION_NAME
, 0);
1053 data_section
= subseg_new (DATA_SECTION_NAME
, 0);
1054 bss_section
= subseg_new (BSS_SECTION_NAME
, 0);
1055 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1056 to have relocs, otherwise we don't find out in time. */
1057 applicable
= bfd_applicable_section_flags (stdoutput
);
1058 bfd_set_section_flags (stdoutput
, text_section
,
1059 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1060 | SEC_CODE
| SEC_READONLY
));
1061 bfd_set_section_flags (stdoutput
, data_section
,
1062 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1064 bfd_set_section_flags (stdoutput
, bss_section
, applicable
& SEC_ALLOC
);
1065 seg_info (bss_section
)->bss
= 1;
1067 subseg_new (BFD_ABS_SECTION_NAME
, 0);
1068 subseg_new (BFD_UND_SECTION_NAME
, 0);
1069 reg_section
= subseg_new ("*GAS `reg' section*", 0);
1070 expr_section
= subseg_new ("*GAS `expr' section*", 0);
1073 subseg_set (text_section
, 0);
1076 /* This may add symbol table entries, which requires having an open BFD,
1077 and sections already created. */
1094 { /* Is it a file-name argument? */
1097 /* argv->"" if stdin desired, else->filename. */
1098 read_a_source_file (*argv
);
1100 argv
++; /* Completed that argv. */
1103 read_a_source_file ("");
1108 create_obj_attrs_section (void)
1115 size
= bfd_elf_obj_attr_size (stdoutput
);
1118 name
= get_elf_backend_data (stdoutput
)->obj_attrs_section
;
1120 name
= ".gnu.attributes";
1121 s
= subseg_new (name
, 0);
1122 elf_section_type (s
)
1123 = get_elf_backend_data (stdoutput
)->obj_attrs_section_type
;
1124 bfd_set_section_flags (stdoutput
, s
, SEC_READONLY
| SEC_DATA
);
1126 p
= frag_more (size
);
1127 bfd_elf_set_obj_attr_contents (stdoutput
, (bfd_byte
*)p
, size
);
1134 main (int argc
, char ** argv
)
1136 char ** argv_orig
= argv
;
1140 start_time
= get_run_time ();
1142 start_sbrk
= (char *) sbrk (0);
1145 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
1146 setlocale (LC_MESSAGES
, "");
1148 #if defined (HAVE_SETLOCALE)
1149 setlocale (LC_CTYPE
, "");
1151 bindtextdomain (PACKAGE
, LOCALEDIR
);
1152 textdomain (PACKAGE
);
1157 #ifdef HOST_SPECIAL_INIT
1158 HOST_SPECIAL_INIT (argc
, argv
);
1162 xmalloc_set_program_name (myname
);
1164 expandargv (&argc
, &argv
);
1166 START_PROGRESS (myname
, 0);
1168 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1169 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1172 out_file_name
= OBJ_DEFAULT_OUTPUT_FILE_NAME
;
1176 bfd_set_error_program_name (myname
);
1178 #ifdef USE_EMULATIONS
1179 select_emulation_mode (argc
, argv
);
1183 /* Call parse_args before any of the init/begin functions
1184 so that switches like --hash-size can be honored. */
1185 parse_args (&argc
, &argv
);
1190 input_scrub_begin ();
1193 /* It has to be called after dump_statistics (). */
1194 xatexit (close_output_file
);
1196 if (flag_print_statistics
)
1197 xatexit (dump_statistics
);
1201 macro_strip_at
= flag_mri
;
1204 macro_init (flag_macro_alternate
, flag_mri
, macro_strip_at
, macro_expr
);
1208 output_file_create (out_file_name
);
1209 gas_assert (stdoutput
!= 0);
1213 #ifdef tc_init_after_args
1214 tc_init_after_args ();
1221 local_symbol_make (".gasversion.", absolute_section
,
1222 BFD_VERSION
/ 10000UL, &predefined_address_frag
);
1224 /* Now that we have fully initialized, and have created the output
1225 file, define any symbols requested by --defsym command line
1227 while (defsyms
!= NULL
)
1230 struct defsym_list
*next
;
1232 sym
= symbol_new (defsyms
->name
, absolute_section
, defsyms
->value
,
1233 &zero_address_frag
);
1234 /* Make symbols defined on the command line volatile, so that they
1235 can be redefined inside a source file. This makes this assembler's
1236 behaviour compatible with earlier versions, but it may not be
1237 completely intuitive. */
1238 S_SET_VOLATILE (sym
);
1239 symbol_table_insert (sym
);
1240 next
= defsyms
->next
;
1248 perform_an_assembly_pass (argc
, argv
);
1250 cond_finish_check (-1);
1258 create_obj_attrs_section ();
1261 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1262 if ((flag_execstack
|| flag_noexecstack
)
1263 && OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
1267 gnustack
= subseg_new (".note.GNU-stack", 0);
1268 bfd_set_section_flags (stdoutput
, gnustack
,
1269 SEC_READONLY
| (flag_execstack
? SEC_CODE
: 0));
1274 /* If we've been collecting dwarf2 .debug_line info, either for
1275 assembly debugging or on behalf of the compiler, emit it now. */
1278 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1279 directives from the user or by the backend, emit it now. */
1282 if (seen_at_least_1_file ()
1283 && (flag_always_generate_output
|| had_errors () == 0))
1288 /* This used to be done at the start of write_object_file in
1289 write.c, but that caused problems when doing listings when
1290 keep_it was zero. This could probably be moved above md_end, but
1291 I didn't want to risk the change. */
1295 write_object_file ();
1300 listing_print (listing_filename
, argv_orig
);
1303 if (flag_fatal_warnings
&& had_warnings () > 0 && had_errors () == 0)
1304 as_bad (_("%d warnings, treating warnings as errors"), had_warnings ());
1306 if (had_errors () > 0 && ! flag_always_generate_output
)
1311 END_PROGRESS (myname
);
1313 /* Use xexit instead of return, because under VMS environments they
1314 may not place the same interpretation on the value given. */
1315 if (had_errors () > 0)
1316 xexit (EXIT_FAILURE
);
1318 /* Only generate dependency file if assembler was successful. */
1319 print_dependencies ();
1321 xexit (EXIT_SUCCESS
);