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
)
147 for (i
= 1; i
< argc
; i
++)
148 if (!strncmp ("--em", argv
[i
], 4))
154 p
= strchr (argv
[i
], '=');
161 as_fatal (_("missing emulation mode name"));
166 em
= getenv (EMULATION_ENVIRON
);
168 em
= DEFAULT_EMULATION
;
172 for (i
= 0; i
< n_emulations
; i
++)
173 if (!strcmp (emulations
[i
]->name
, em
))
175 if (i
== n_emulations
)
176 as_fatal (_("unrecognized emulation name `%s'"), em
);
177 this_emulation
= emulations
[i
];
180 this_emulation
= emulations
[0];
182 this_emulation
->init ();
186 default_emul_bfd_name (void)
193 common_emul_init (void)
195 this_format
= this_emulation
->format
;
197 if (this_emulation
->leading_underscore
== 2)
198 this_emulation
->leading_underscore
= this_format
->dfl_leading_underscore
;
200 if (this_emulation
->default_endian
!= 2)
201 target_big_endian
= this_emulation
->default_endian
;
203 if (this_emulation
->fake_label_name
== 0)
205 if (this_emulation
->leading_underscore
)
206 this_emulation
->fake_label_name
= "L0\001";
208 /* What other parameters should we test? */
209 this_emulation
->fake_label_name
= ".L0\001";
215 print_version_id (void)
223 fprintf (stderr
, _("GNU assembler version %s (%s) using BFD version %s\n"),
224 VERSION
, TARGET_ALIAS
, BFD_VERSION_STRING
);
227 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
228 enum compressed_debug_section_type flag_compress_debug
229 = COMPRESS_DEBUG_GABI_ZLIB
;
233 show_usage (FILE * stream
)
235 fprintf (stream
, _("Usage: %s [option...] [asmfile...]\n"), myname
);
237 fprintf (stream
, _("\
239 -a[sub-option...] turn on listings\n\
240 Sub-options [default hls]:\n\
241 c omit false conditionals\n\
242 d omit debugging directives\n\
243 g include general info\n\
244 h include high-level source\n\
245 l include assembly\n\
246 m include macro expansions\n\
247 n omit forms processing\n\
249 =FILE list to FILE (must be last sub-option)\n"));
251 fprintf (stream
, _("\
252 --alternate initially turn on alternate macro syntax\n"));
253 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
254 fprintf (stream
, _("\
255 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
256 compress DWARF debug sections using zlib [default]\n"));
257 fprintf (stream
, _("\
258 --nocompress-debug-sections\n\
259 don't compress DWARF debug sections\n"));
261 fprintf (stream
, _("\
262 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
263 compress DWARF debug sections using zlib\n"));
264 fprintf (stream
, _("\
265 --nocompress-debug-sections\n\
266 don't compress DWARF debug sections [default]\n"));
268 fprintf (stream
, _("\
269 -D produce assembler debugging messages\n"));
270 fprintf (stream
, _("\
271 --debug-prefix-map OLD=NEW\n\
272 map OLD to NEW in debug information\n"));
273 fprintf (stream
, _("\
274 --defsym SYM=VAL define symbol SYM to given value\n"));
275 #ifdef USE_EMULATIONS
282 for (i
= 0; i
< n_emulations
- 1; i
++)
283 fprintf (stream
, "%s | ", emulations
[i
]->name
);
284 fprintf (stream
, "%s]\n", emulations
[i
]->name
);
286 def_em
= getenv (EMULATION_ENVIRON
);
288 def_em
= DEFAULT_EMULATION
;
289 fprintf (stream
, _("\
290 emulate output (default %s)\n"), def_em
);
293 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
294 fprintf (stream
, _("\
295 --execstack require executable stack for this object\n"));
296 fprintf (stream
, _("\
297 --noexecstack don't require executable stack for this object\n"));
298 fprintf (stream
, _("\
299 --size-check=[error|warning]\n\
300 ELF .size directive check (default --size-check=error)\n"));
301 fprintf (stream
, _("\
302 --sectname-subst enable section name substitution sequences\n"));
304 fprintf (stream
, _("\
305 -f skip whitespace and comment preprocessing\n"));
306 fprintf (stream
, _("\
307 -g --gen-debug generate debugging information\n"));
308 fprintf (stream
, _("\
309 --gstabs generate STABS debugging information\n"));
310 fprintf (stream
, _("\
311 --gstabs+ generate STABS debug info with GNU extensions\n"));
312 fprintf (stream
, _("\
313 --gdwarf-2 generate DWARF2 debugging information\n"));
314 fprintf (stream
, _("\
315 --gdwarf-sections generate per-function section names for DWARF line information\n"));
316 fprintf (stream
, _("\
317 --hash-size=<value> set the hash table size close to <value>\n"));
318 fprintf (stream
, _("\
319 --help show this message and exit\n"));
320 fprintf (stream
, _("\
321 --target-help show target specific options\n"));
322 fprintf (stream
, _("\
323 -I DIR add DIR to search list for .include directives\n"));
324 fprintf (stream
, _("\
325 -J don't warn about signed overflow\n"));
326 fprintf (stream
, _("\
327 -K warn when differences altered for long displacements\n"));
328 fprintf (stream
, _("\
329 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
330 fprintf (stream
, _("\
331 -M,--mri assemble in MRI compatibility mode\n"));
332 fprintf (stream
, _("\
333 --MD FILE write dependency information in FILE (default none)\n"));
334 fprintf (stream
, _("\
336 fprintf (stream
, _("\
337 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
338 fprintf (stream
, _("\
339 -R fold data section into text section\n"));
340 fprintf (stream
, _("\
341 --reduce-memory-overheads \n\
342 prefer smaller memory use at the cost of longer\n\
344 fprintf (stream
, _("\
345 --statistics print various measured statistics from execution\n"));
346 fprintf (stream
, _("\
347 --strip-local-absolute strip local absolute symbols\n"));
348 fprintf (stream
, _("\
349 --traditional-format Use same format as native assembler when possible\n"));
350 fprintf (stream
, _("\
351 --version print assembler version number and exit\n"));
352 fprintf (stream
, _("\
353 -W --no-warn suppress warnings\n"));
354 fprintf (stream
, _("\
355 --warn don't suppress warnings\n"));
356 fprintf (stream
, _("\
357 --fatal-warnings treat warnings as errors\n"));
359 fprintf (stream
, _("\
360 --itbl INSTTBL extend instruction set to include instructions\n\
361 matching the specifications defined in file INSTTBL\n"));
363 fprintf (stream
, _("\
365 fprintf (stream
, _("\
367 fprintf (stream
, _("\
368 -Z generate object file even after errors\n"));
369 fprintf (stream
, _("\
370 --listing-lhs-width set the width in words of the output data column of\n\
372 fprintf (stream
, _("\
373 --listing-lhs-width2 set the width in words of the continuation lines\n\
374 of the output data column; ignored if smaller than\n\
375 the width of the first line\n"));
376 fprintf (stream
, _("\
377 --listing-rhs-width set the max width in characters of the lines from\n\
378 the source file\n"));
379 fprintf (stream
, _("\
380 --listing-cont-lines set the maximum number of continuation lines used\n\
381 for the output data column of the listing\n"));
382 fprintf (stream
, _("\
383 @FILE read options from FILE\n"));
385 md_show_usage (stream
);
387 fputc ('\n', stream
);
389 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
390 fprintf (stream
, _("Report bugs to %s\n"), REPORT_BUGS_TO
);
393 /* Since it is easy to do here we interpret the special arg "-"
394 to mean "use stdin" and we set that argv[] pointing to "".
395 After we have munged argv[], the only things left are source file
396 name(s) and ""(s) denoting stdin. These file names are used
397 (perhaps more than once) later.
399 check for new machine-dep cmdline options in
400 md_parse_option definitions in config/tc-*.c. */
403 parse_args (int * pargc
, char *** pargv
)
409 /* Starting the short option string with '-' is for programs that
410 expect options and other ARGV-elements in any order and that care about
411 the ordering of the two. We describe each non-option ARGV-element
412 as if it were the argument of an option with character code 1. */
414 extern const char *md_shortopts
;
415 static const char std_shortopts
[] =
418 #ifndef WORKING_DOT_WORD
419 /* -K is not meaningful if .word is not being hacked. */
422 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
424 /* -v takes an argument on VMS, so we don't make it a generic
430 /* New option for extending instruction set (see also --itbl below). */
435 struct option
*longopts
;
436 extern struct option md_longopts
[];
437 extern size_t md_longopts_size
;
438 /* Codes used for the long options with no short synonyms. */
441 OPTION_HELP
= OPTION_STD_BASE
,
448 OPTION_DEBUG_PREFIX_MAP
,
450 OPTION_LISTING_LHS_WIDTH
,
451 OPTION_LISTING_LHS_WIDTH2
,
452 OPTION_LISTING_RHS_WIDTH
,
453 OPTION_LISTING_CONT_LINES
,
458 OPTION_GDWARF_SECTIONS
,
459 OPTION_STRIP_LOCAL_ABSOLUTE
,
460 OPTION_TRADITIONAL_FORMAT
,
466 OPTION_SECTNAME_SUBST
,
469 OPTION_HASH_TABLE_SIZE
,
470 OPTION_REDUCE_MEMORY_OVERHEADS
,
472 OPTION_COMPRESS_DEBUG
,
473 OPTION_NOCOMPRESS_DEBUG
474 /* When you add options here, check that they do
475 not collide with OPTION_MD_BASE. See as.h. */
478 static const struct option std_longopts
[] =
480 /* Note: commas are placed at the start of the line rather than
481 the end of the preceding line so that it is simpler to
482 selectively add and remove lines from this list. */
483 {"alternate", no_argument
, NULL
, OPTION_ALTERNATE
}
484 /* The entry for "a" is here to prevent getopt_long_only() from
485 considering that -a is an abbreviation for --alternate. This is
486 necessary because -a=<FILE> is a valid switch but getopt would
487 normally reject it since --alternate does not take an argument. */
488 ,{"a", optional_argument
, NULL
, 'a'}
489 /* Handle -al=<FILE>. */
490 ,{"al", optional_argument
, NULL
, OPTION_AL
}
491 ,{"compress-debug-sections", optional_argument
, NULL
, OPTION_COMPRESS_DEBUG
}
492 ,{"nocompress-debug-sections", no_argument
, NULL
, OPTION_NOCOMPRESS_DEBUG
}
493 ,{"debug-prefix-map", required_argument
, NULL
, OPTION_DEBUG_PREFIX_MAP
}
494 ,{"defsym", required_argument
, NULL
, OPTION_DEFSYM
}
495 ,{"dump-config", no_argument
, NULL
, OPTION_DUMPCONFIG
}
496 ,{"emulation", required_argument
, NULL
, OPTION_EMULATION
}
497 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
498 ,{"execstack", no_argument
, NULL
, OPTION_EXECSTACK
}
499 ,{"noexecstack", no_argument
, NULL
, OPTION_NOEXECSTACK
}
500 ,{"size-check", required_argument
, NULL
, OPTION_SIZE_CHECK
}
501 ,{"sectname-subst", no_argument
, NULL
, OPTION_SECTNAME_SUBST
}
503 ,{"fatal-warnings", no_argument
, NULL
, OPTION_WARN_FATAL
}
504 ,{"gdwarf-2", no_argument
, NULL
, OPTION_GDWARF2
}
505 /* GCC uses --gdwarf-2 but GAS uses to use --gdwarf2,
506 so we keep it here for backwards compatibility. */
507 ,{"gdwarf2", no_argument
, NULL
, OPTION_GDWARF2
}
508 ,{"gdwarf-sections", no_argument
, NULL
, OPTION_GDWARF_SECTIONS
}
509 ,{"gen-debug", no_argument
, NULL
, 'g'}
510 ,{"gstabs", no_argument
, NULL
, OPTION_GSTABS
}
511 ,{"gstabs+", no_argument
, NULL
, OPTION_GSTABS_PLUS
}
512 ,{"hash-size", required_argument
, NULL
, OPTION_HASH_TABLE_SIZE
}
513 ,{"help", no_argument
, NULL
, OPTION_HELP
}
515 /* New option for extending instruction set (see also -t above).
516 The "-t file" or "--itbl file" option extends the basic set of
517 valid instructions by reading "file", a text file containing a
518 list of instruction formats. The additional opcodes and their
519 formats are added to the built-in set of instructions, and
520 mnemonics for new registers may also be defined. */
521 ,{"itbl", required_argument
, NULL
, 't'}
523 /* getopt allows abbreviations, so we do this to stop it from
524 treating -k as an abbreviation for --keep-locals. Some
525 ports use -k to enable PIC assembly. */
526 ,{"keep-locals", no_argument
, NULL
, 'L'}
527 ,{"keep-locals", no_argument
, NULL
, 'L'}
528 ,{"listing-lhs-width", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH
}
529 ,{"listing-lhs-width2", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH2
}
530 ,{"listing-rhs-width", required_argument
, NULL
, OPTION_LISTING_RHS_WIDTH
}
531 ,{"listing-cont-lines", required_argument
, NULL
, OPTION_LISTING_CONT_LINES
}
532 ,{"MD", required_argument
, NULL
, OPTION_DEPFILE
}
533 ,{"mri", no_argument
, NULL
, 'M'}
534 ,{"nocpp", no_argument
, NULL
, OPTION_NOCPP
}
535 ,{"no-warn", no_argument
, NULL
, 'W'}
536 ,{"reduce-memory-overheads", no_argument
, NULL
, OPTION_REDUCE_MEMORY_OVERHEADS
}
537 ,{"statistics", no_argument
, NULL
, OPTION_STATISTICS
}
538 ,{"strip-local-absolute", no_argument
, NULL
, OPTION_STRIP_LOCAL_ABSOLUTE
}
539 ,{"version", no_argument
, NULL
, OPTION_VERSION
}
540 ,{"verbose", no_argument
, NULL
, OPTION_VERBOSE
}
541 ,{"target-help", no_argument
, NULL
, OPTION_TARGET_HELP
}
542 ,{"traditional-format", no_argument
, NULL
, OPTION_TRADITIONAL_FORMAT
}
543 ,{"warn", no_argument
, NULL
, OPTION_WARN
}
546 /* Construct the option lists from the standard list and the target
547 dependent list. Include space for an extra NULL option and
548 always NULL terminate. */
549 shortopts
= concat (std_shortopts
, md_shortopts
, (char *) NULL
);
550 longopts
= (struct option
*) xmalloc (sizeof (std_longopts
)
551 + md_longopts_size
+ sizeof (struct option
));
552 memcpy (longopts
, std_longopts
, sizeof (std_longopts
));
553 memcpy (((char *) longopts
) + sizeof (std_longopts
), md_longopts
, md_longopts_size
);
554 memset (((char *) longopts
) + sizeof (std_longopts
) + md_longopts_size
,
555 0, sizeof (struct option
));
557 /* Make a local copy of the old argv. */
561 /* Initialize a new argv that contains no options. */
562 new_argv
= (char **) xmalloc (sizeof (char *) * (old_argc
+ 1));
563 new_argv
[0] = old_argv
[0];
565 new_argv
[new_argc
] = NULL
;
569 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
570 indicate a long option. */
572 int optc
= getopt_long_only (old_argc
, old_argv
, shortopts
, longopts
,
581 /* md_parse_option should return 1 if it recognizes optc,
583 if (md_parse_option (optc
, optarg
) != 0)
585 /* `-v' isn't included in the general short_opts list, so check for
586 it explicitly here before deciding we've gotten a bad argument. */
590 /* Telling getopt to treat -v's value as optional can result
591 in it picking up a following filename argument here. The
592 VMS code in md_parse_option can return 0 in that case,
593 but it has no way of pushing the filename argument back. */
594 if (optarg
&& *optarg
)
595 new_argv
[new_argc
++] = optarg
, new_argv
[new_argc
] = NULL
;
606 as_bad (_("unrecognized option -%c%s"), optc
, optarg
? optarg
: "");
612 case 1: /* File name. */
613 if (!strcmp (optarg
, "-"))
615 new_argv
[new_argc
++] = optarg
;
616 new_argv
[new_argc
] = NULL
;
619 case OPTION_TARGET_HELP
:
620 md_show_usage (stdout
);
630 case OPTION_STATISTICS
:
631 flag_print_statistics
= 1;
634 case OPTION_STRIP_LOCAL_ABSOLUTE
:
635 flag_strip_local_absolute
= 1;
638 case OPTION_TRADITIONAL_FORMAT
:
639 flag_traditional_format
= 1;
643 /* This output is intended to follow the GNU standards document. */
644 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING
);
645 printf (_("Copyright (C) 2016 Free Software Foundation, Inc.\n"));
647 This program is free software; you may redistribute it under the terms of\n\
648 the GNU General Public License version 3 or later.\n\
649 This program has absolutely no warranty.\n"));
650 printf (_("This assembler was configured for a target of `%s'.\n"),
654 case OPTION_EMULATION
:
655 #ifdef USE_EMULATIONS
656 if (strcmp (optarg
, this_emulation
->name
))
657 as_fatal (_("multiple emulation names specified"));
659 as_fatal (_("emulations not handled in this configuration"));
663 case OPTION_DUMPCONFIG
:
664 fprintf (stderr
, _("alias = %s\n"), TARGET_ALIAS
);
665 fprintf (stderr
, _("canonical = %s\n"), TARGET_CANONICAL
);
666 fprintf (stderr
, _("cpu-type = %s\n"), TARGET_CPU
);
667 #ifdef TARGET_OBJ_FORMAT
668 fprintf (stderr
, _("format = %s\n"), TARGET_OBJ_FORMAT
);
671 fprintf (stderr
, _("bfd-target = %s\n"), TARGET_FORMAT
);
675 case OPTION_COMPRESS_DEBUG
:
678 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
679 if (strcasecmp (optarg
, "none") == 0)
680 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
681 else if (strcasecmp (optarg
, "zlib") == 0)
682 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
683 else if (strcasecmp (optarg
, "zlib-gnu") == 0)
684 flag_compress_debug
= COMPRESS_DEBUG_GNU_ZLIB
;
685 else if (strcasecmp (optarg
, "zlib-gabi") == 0)
686 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
688 as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
691 as_fatal (_("--compress-debug-sections=%s is unsupported"),
696 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
699 case OPTION_NOCOMPRESS_DEBUG
:
700 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
703 case OPTION_DEBUG_PREFIX_MAP
:
704 add_debug_prefix_map (optarg
);
711 struct defsym_list
*n
;
713 for (s
= optarg
; *s
!= '\0' && *s
!= '='; s
++)
716 as_fatal (_("bad defsym; format is --defsym name=value"));
718 i
= bfd_scan_vma (s
, (const char **) NULL
, 0);
719 n
= (struct defsym_list
*) xmalloc (sizeof *n
);
730 /* optarg is the name of the file containing the instruction
731 formats, opcodes, register names, etc. */
732 struct itbl_file_list
*n
;
736 as_warn (_("no file name following -t option"));
740 n
= xmalloc (sizeof * n
);
741 n
->next
= itbl_files
;
745 /* Parse the file and add the new instructions to our internal
746 table. If multiple instruction tables are specified, the
747 information from this table gets appended onto the existing
749 itbl_files
->name
= xstrdup (optarg
);
750 if (itbl_parse (itbl_files
->name
) != 0)
751 as_fatal (_("failed to read instruction table %s\n"),
758 start_dependencies (optarg
);
762 /* Some backends, eg Alpha and Mips, use the -g switch for their
763 own purposes. So we check here for an explicit -g and allow
764 the backend to decide if it wants to process it. */
765 if ( old_argv
[optind
- 1][1] == 'g'
766 && md_parse_option (optc
, optarg
))
769 if (md_debug_format_selector
)
770 debug_type
= md_debug_format_selector (& use_gnu_debug_info_extensions
);
772 debug_type
= DEBUG_DWARF2
;
774 debug_type
= DEBUG_STABS
;
777 case OPTION_GSTABS_PLUS
:
778 use_gnu_debug_info_extensions
= 1;
781 debug_type
= DEBUG_STABS
;
785 debug_type
= DEBUG_DWARF2
;
788 case OPTION_GDWARF_SECTIONS
:
789 flag_dwarf_sections
= TRUE
;
793 flag_signed_overflow_ok
= 1;
796 #ifndef WORKING_DOT_WORD
798 flag_warn_displacement
= 1;
802 flag_keep_locals
= 1;
805 case OPTION_LISTING_LHS_WIDTH
:
806 listing_lhs_width
= atoi (optarg
);
807 if (listing_lhs_width_second
< listing_lhs_width
)
808 listing_lhs_width_second
= listing_lhs_width
;
810 case OPTION_LISTING_LHS_WIDTH2
:
812 int tmp
= atoi (optarg
);
814 if (tmp
> listing_lhs_width
)
815 listing_lhs_width_second
= tmp
;
818 case OPTION_LISTING_RHS_WIDTH
:
819 listing_rhs_width
= atoi (optarg
);
821 case OPTION_LISTING_CONT_LINES
:
822 listing_lhs_cont_lines
= atoi (optarg
);
833 flag_readonly_data_in_text
= 1;
837 flag_no_warnings
= 1;
841 flag_no_warnings
= 0;
842 flag_fatal_warnings
= 0;
845 case OPTION_WARN_FATAL
:
846 flag_no_warnings
= 0;
847 flag_fatal_warnings
= 1;
850 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
851 case OPTION_EXECSTACK
:
853 flag_noexecstack
= 0;
856 case OPTION_NOEXECSTACK
:
857 flag_noexecstack
= 1;
861 case OPTION_SIZE_CHECK
:
862 if (strcasecmp (optarg
, "error") == 0)
863 flag_size_check
= size_check_error
;
864 else if (strcasecmp (optarg
, "warning") == 0)
865 flag_size_check
= size_check_warning
;
867 as_fatal (_("Invalid --size-check= option: `%s'"), optarg
);
870 case OPTION_SECTNAME_SUBST
:
871 flag_sectname_subst
= 1;
875 flag_always_generate_output
= 1;
879 listing
|= LISTING_LISTING
;
881 listing_filename
= xstrdup (optarg
);
884 case OPTION_ALTERNATE
:
885 optarg
= old_argv
[optind
- 1];
886 while (* optarg
== '-')
889 if (strcmp (optarg
, "alternate") == 0)
891 flag_macro_alternate
= 1;
900 if (optarg
!= old_argv
[optind
] && optarg
[-1] == '=')
903 if (md_parse_option (optc
, optarg
) != 0)
911 listing
|= LISTING_NOCOND
;
914 listing
|= LISTING_NODEBUG
;
917 listing
|= LISTING_GENERAL
;
920 listing
|= LISTING_HLL
;
923 listing
|= LISTING_LISTING
;
926 listing
|= LISTING_MACEXP
;
929 listing
|= LISTING_NOFORM
;
932 listing
|= LISTING_SYMBOLS
;
935 listing_filename
= xstrdup (optarg
+ 1);
936 optarg
+= strlen (listing_filename
);
939 as_fatal (_("invalid listing option `%c'"), *optarg
);
946 listing
= LISTING_DEFAULT
;
950 /* DEBUG is implemented: it debugs different
951 things from other people's assemblers. */
956 flag_no_comments
= 1;
960 { /* Include file directory. */
961 char *temp
= xstrdup (optarg
);
963 add_include_dir (temp
);
968 out_file_name
= xstrdup (optarg
);
975 /* -X means treat warnings as errors. */
978 case OPTION_REDUCE_MEMORY_OVERHEADS
:
979 /* The only change we make at the moment is to reduce
980 the size of the hash tables that we use. */
981 set_gas_hash_table_size (4051);
984 case OPTION_HASH_TABLE_SIZE
:
986 unsigned long new_size
;
988 new_size
= strtoul (optarg
, NULL
, 0);
990 set_gas_hash_table_size (new_size
);
992 as_fatal (_("--hash-size needs a numeric argument"));
1004 #ifdef md_after_parse_args
1005 md_after_parse_args ();
1010 dump_statistics (void)
1013 char *lim
= (char *) sbrk (0);
1015 long run_time
= get_run_time () - start_time
;
1017 fprintf (stderr
, _("%s: total time in assembly: %ld.%06ld\n"),
1018 myname
, run_time
/ 1000000, run_time
% 1000000);
1020 fprintf (stderr
, _("%s: data size %ld\n"),
1021 myname
, (long) (lim
- start_sbrk
));
1024 subsegs_print_statistics (stderr
);
1025 write_print_statistics (stderr
);
1026 symbol_print_statistics (stderr
);
1027 read_print_statistics (stderr
);
1029 #ifdef tc_print_statistics
1030 tc_print_statistics (stderr
);
1033 #ifdef obj_print_statistics
1034 obj_print_statistics (stderr
);
1039 close_output_file (void)
1041 output_file_close (out_file_name
);
1043 unlink_if_ordinary (out_file_name
);
1046 /* The interface between the macro code and gas expression handling. */
1049 macro_expr (const char *emsg
, size_t idx
, sb
*in
, offsetT
*val
)
1056 hold
= input_line_pointer
;
1057 input_line_pointer
= in
->ptr
+ idx
;
1058 expression_and_evaluate (&ex
);
1059 idx
= input_line_pointer
- in
->ptr
;
1060 input_line_pointer
= hold
;
1062 if (ex
.X_op
!= O_constant
)
1063 as_bad ("%s", emsg
);
1065 *val
= ex
.X_add_number
;
1070 /* Here to attempt 1 pass over each input file.
1071 We scan argv[*] looking for filenames or exactly "" which is
1072 shorthand for stdin. Any argv that is NULL is not a file-name.
1073 We set need_pass_2 TRUE if, after this, we still have unresolved
1074 expressions of the form (unknown value)+-(unknown value).
1076 Note the un*x semantics: there is only 1 logical input file, but it
1077 may be a catenation of many 'physical' input files. */
1080 perform_an_assembly_pass (int argc
, char ** argv
)
1084 flagword applicable
;
1090 /* Create the standard sections, and those the assembler uses
1092 text_section
= subseg_new (TEXT_SECTION_NAME
, 0);
1093 data_section
= subseg_new (DATA_SECTION_NAME
, 0);
1094 bss_section
= subseg_new (BSS_SECTION_NAME
, 0);
1095 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1096 to have relocs, otherwise we don't find out in time. */
1097 applicable
= bfd_applicable_section_flags (stdoutput
);
1098 bfd_set_section_flags (stdoutput
, text_section
,
1099 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1100 | SEC_CODE
| SEC_READONLY
));
1101 bfd_set_section_flags (stdoutput
, data_section
,
1102 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1104 bfd_set_section_flags (stdoutput
, bss_section
, applicable
& SEC_ALLOC
);
1105 seg_info (bss_section
)->bss
= 1;
1107 subseg_new (BFD_ABS_SECTION_NAME
, 0);
1108 subseg_new (BFD_UND_SECTION_NAME
, 0);
1109 reg_section
= subseg_new ("*GAS `reg' section*", 0);
1110 expr_section
= subseg_new ("*GAS `expr' section*", 0);
1113 subseg_set (text_section
, 0);
1116 /* This may add symbol table entries, which requires having an open BFD,
1117 and sections already created. */
1134 { /* Is it a file-name argument? */
1137 /* argv->"" if stdin desired, else->filename. */
1138 read_a_source_file (*argv
);
1140 argv
++; /* Completed that argv. */
1143 read_a_source_file ("");
1148 main (int argc
, char ** argv
)
1150 char ** argv_orig
= argv
;
1154 start_time
= get_run_time ();
1156 start_sbrk
= (char *) sbrk (0);
1159 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
1160 setlocale (LC_MESSAGES
, "");
1162 #if defined (HAVE_SETLOCALE)
1163 setlocale (LC_CTYPE
, "");
1165 bindtextdomain (PACKAGE
, LOCALEDIR
);
1166 textdomain (PACKAGE
);
1171 #ifdef HOST_SPECIAL_INIT
1172 HOST_SPECIAL_INIT (argc
, argv
);
1176 xmalloc_set_program_name (myname
);
1178 expandargv (&argc
, &argv
);
1180 START_PROGRESS (myname
, 0);
1182 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1183 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1186 out_file_name
= OBJ_DEFAULT_OUTPUT_FILE_NAME
;
1190 bfd_set_error_program_name (myname
);
1192 #ifdef USE_EMULATIONS
1193 select_emulation_mode (argc
, argv
);
1197 /* Call parse_args before any of the init/begin functions
1198 so that switches like --hash-size can be honored. */
1199 parse_args (&argc
, &argv
);
1204 input_scrub_begin ();
1207 /* It has to be called after dump_statistics (). */
1208 xatexit (close_output_file
);
1210 if (flag_print_statistics
)
1211 xatexit (dump_statistics
);
1215 macro_strip_at
= flag_mri
;
1218 macro_init (flag_macro_alternate
, flag_mri
, macro_strip_at
, macro_expr
);
1222 output_file_create (out_file_name
);
1223 gas_assert (stdoutput
!= 0);
1227 #ifdef tc_init_after_args
1228 tc_init_after_args ();
1235 local_symbol_make (".gasversion.", absolute_section
,
1236 BFD_VERSION
/ 10000UL, &predefined_address_frag
);
1238 /* Now that we have fully initialized, and have created the output
1239 file, define any symbols requested by --defsym command line
1241 while (defsyms
!= NULL
)
1244 struct defsym_list
*next
;
1246 sym
= symbol_new (defsyms
->name
, absolute_section
, defsyms
->value
,
1247 &zero_address_frag
);
1248 /* Make symbols defined on the command line volatile, so that they
1249 can be redefined inside a source file. This makes this assembler's
1250 behaviour compatible with earlier versions, but it may not be
1251 completely intuitive. */
1252 S_SET_VOLATILE (sym
);
1253 symbol_table_insert (sym
);
1254 next
= defsyms
->next
;
1262 perform_an_assembly_pass (argc
, argv
);
1264 cond_finish_check (-1);
1270 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1271 if ((flag_execstack
|| flag_noexecstack
)
1272 && OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
1276 gnustack
= subseg_new (".note.GNU-stack", 0);
1277 bfd_set_section_flags (stdoutput
, gnustack
,
1278 SEC_READONLY
| (flag_execstack
? SEC_CODE
: 0));
1283 /* If we've been collecting dwarf2 .debug_line info, either for
1284 assembly debugging or on behalf of the compiler, emit it now. */
1287 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1288 directives from the user or by the backend, emit it now. */
1292 if (seen_at_least_1_file ())
1294 int n_warns
, n_errs
;
1298 write_object_file ();
1300 n_warns
= had_warnings ();
1301 n_errs
= had_errors ();
1304 sprintf (warn_msg
, _("%d warning"), n_warns
);
1306 sprintf (warn_msg
, _("%d warnings"), n_warns
);
1308 sprintf (err_msg
, _("%d error"), n_errs
);
1310 sprintf (err_msg
, _("%d errors"), n_errs
);
1312 if (flag_fatal_warnings
&& n_warns
!= 0)
1315 as_bad (_("%s, treating warnings as errors"), warn_msg
);
1321 else if (flag_always_generate_output
)
1323 /* The -Z flag indicates that an object file should be generated,
1324 regardless of warnings and errors. */
1326 fprintf (stderr
, _("%s, %s, generating bad object file\n"),
1334 listing_print (listing_filename
, argv_orig
);
1339 END_PROGRESS (myname
);
1341 /* Use xexit instead of return, because under VMS environments they
1342 may not place the same interpretation on the value given. */
1343 if (had_errors () != 0)
1344 xexit (EXIT_FAILURE
);
1346 /* Only generate dependency file if assembler was successful. */
1347 print_dependencies ();
1349 xexit (EXIT_SUCCESS
);