1 /* as.c - GAS main program.
2 Copyright (C) 1987-2016 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
6 GAS is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
11 GAS is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
14 License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GAS; see the file COPYING. If not, write to the Free
18 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
21 /* Main program for AS; a 32-bit assembler of GNU.
22 Understands command arguments.
23 Has a few routines that don't fit in other modules because they
29 Since no-one else says they will support them in future: I
30 don't support them now. */
36 #include "output-file.h"
39 #include "dwarf2dbg.h"
40 #include "dw2gencfi.h"
50 #ifdef NEED_DECLARATION_SBRK
56 /* Perform any cgen specific initialisation for gas. */
57 extern void gas_cgen_begin (void);
60 /* We build a list of defsyms as we read the options, and then define
61 them after we have initialized everything. */
64 struct defsym_list
*next
;
70 /* True if a listing is wanted. */
73 /* Type of debugging to generate. */
74 enum debug_info_type debug_type
= DEBUG_UNSPECIFIED
;
75 int use_gnu_debug_info_extensions
= 0;
77 #ifndef MD_DEBUG_FORMAT_SELECTOR
78 #define MD_DEBUG_FORMAT_SELECTOR NULL
80 static enum debug_info_type (*md_debug_format_selector
) (int *) = MD_DEBUG_FORMAT_SELECTOR
;
82 /* Maximum level of macro nesting. */
83 int max_macro_nest
= 100;
88 /* The default obstack chunk size. If we set this to zero, the
89 obstack code will use whatever will fit in a 4096 byte block. */
92 /* To monitor memory allocation more effectively, make this non-zero.
93 Then the chunk sizes for gas and bfd will be reduced. */
96 /* Enable verbose mode. */
99 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
100 int flag_use_elf_stt_common
= DEFAULT_GENERATE_ELF_STT_COMMON
;
103 /* Keep the output file. */
104 static int keep_it
= 0;
112 /* Name of listing file. */
113 static char *listing_filename
= NULL
;
115 static struct defsym_list
*defsyms
;
118 /* Keep a record of the itbl files we read in. */
119 struct itbl_file_list
121 struct itbl_file_list
*next
;
124 static struct itbl_file_list
*itbl_files
;
127 static long start_time
;
132 static int flag_macro_alternate
;
135 #ifdef USE_EMULATIONS
136 #define EMULATION_ENVIRON "AS_EMULATION"
138 extern struct emulation mipsbelf
, mipslelf
, mipself
;
139 extern struct emulation i386coff
, i386elf
, i386aout
;
140 extern struct emulation crisaout
, criself
;
142 static struct emulation
*const emulations
[] = { EMULATIONS
};
143 static const int n_emulations
= sizeof (emulations
) / sizeof (emulations
[0]);
146 select_emulation_mode (int argc
, char **argv
)
150 const char *em
= NULL
;
152 for (i
= 1; i
< argc
; i
++)
153 if (!strncmp ("--em", argv
[i
], 4))
159 p
= strchr (argv
[i
], '=');
166 as_fatal (_("missing emulation mode name"));
171 em
= getenv (EMULATION_ENVIRON
);
173 em
= DEFAULT_EMULATION
;
177 for (i
= 0; i
< n_emulations
; i
++)
178 if (!strcmp (emulations
[i
]->name
, em
))
180 if (i
== n_emulations
)
181 as_fatal (_("unrecognized emulation name `%s'"), em
);
182 this_emulation
= emulations
[i
];
185 this_emulation
= emulations
[0];
187 this_emulation
->init ();
191 default_emul_bfd_name (void)
198 common_emul_init (void)
200 this_format
= this_emulation
->format
;
202 if (this_emulation
->leading_underscore
== 2)
203 this_emulation
->leading_underscore
= this_format
->dfl_leading_underscore
;
205 if (this_emulation
->default_endian
!= 2)
206 target_big_endian
= this_emulation
->default_endian
;
208 if (this_emulation
->fake_label_name
== 0)
210 if (this_emulation
->leading_underscore
)
211 this_emulation
->fake_label_name
= "L0\001";
213 /* What other parameters should we test? */
214 this_emulation
->fake_label_name
= ".L0\001";
220 print_version_id (void)
228 fprintf (stderr
, _("GNU assembler version %s (%s) using BFD version %s\n"),
229 VERSION
, TARGET_ALIAS
, BFD_VERSION_STRING
);
232 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
233 enum compressed_debug_section_type flag_compress_debug
234 = COMPRESS_DEBUG_GABI_ZLIB
;
238 show_usage (FILE * stream
)
240 fprintf (stream
, _("Usage: %s [option...] [asmfile...]\n"), myname
);
242 fprintf (stream
, _("\
244 -a[sub-option...] turn on listings\n\
245 Sub-options [default hls]:\n\
246 c omit false conditionals\n\
247 d omit debugging directives\n\
248 g include general info\n\
249 h include high-level source\n\
250 l include assembly\n\
251 m include macro expansions\n\
252 n omit forms processing\n\
254 =FILE list to FILE (must be last sub-option)\n"));
256 fprintf (stream
, _("\
257 --alternate initially turn on alternate macro syntax\n"));
258 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
259 fprintf (stream
, _("\
260 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
261 compress DWARF debug sections using zlib [default]\n"));
262 fprintf (stream
, _("\
263 --nocompress-debug-sections\n\
264 don't compress DWARF debug sections\n"));
266 fprintf (stream
, _("\
267 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
268 compress DWARF debug sections using zlib\n"));
269 fprintf (stream
, _("\
270 --nocompress-debug-sections\n\
271 don't compress DWARF debug sections [default]\n"));
273 fprintf (stream
, _("\
274 -D produce assembler debugging messages\n"));
275 fprintf (stream
, _("\
276 --debug-prefix-map OLD=NEW\n\
277 map OLD to NEW in debug information\n"));
278 fprintf (stream
, _("\
279 --defsym SYM=VAL define symbol SYM to given value\n"));
280 #ifdef USE_EMULATIONS
287 for (i
= 0; i
< n_emulations
- 1; i
++)
288 fprintf (stream
, "%s | ", emulations
[i
]->name
);
289 fprintf (stream
, "%s]\n", emulations
[i
]->name
);
291 def_em
= getenv (EMULATION_ENVIRON
);
293 def_em
= DEFAULT_EMULATION
;
294 fprintf (stream
, _("\
295 emulate output (default %s)\n"), def_em
);
298 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
299 fprintf (stream
, _("\
300 --execstack require executable stack for this object\n"));
301 fprintf (stream
, _("\
302 --noexecstack don't require executable stack for this object\n"));
303 fprintf (stream
, _("\
304 --size-check=[error|warning]\n\
305 ELF .size directive check (default --size-check=error)\n"));
306 fprintf (stream
, _("\
307 --elf-stt-common=[no|yes]\n\
308 generate ELF common symbols with STT_COMMON type\n"));
309 fprintf (stream
, _("\
310 --sectname-subst enable section name substitution sequences\n"));
312 fprintf (stream
, _("\
313 -f skip whitespace and comment preprocessing\n"));
314 fprintf (stream
, _("\
315 -g --gen-debug generate debugging information\n"));
316 fprintf (stream
, _("\
317 --gstabs generate STABS debugging information\n"));
318 fprintf (stream
, _("\
319 --gstabs+ generate STABS debug info with GNU extensions\n"));
320 fprintf (stream
, _("\
321 --gdwarf-2 generate DWARF2 debugging information\n"));
322 fprintf (stream
, _("\
323 --gdwarf-sections generate per-function section names for DWARF line information\n"));
324 fprintf (stream
, _("\
325 --hash-size=<value> set the hash table size close to <value>\n"));
326 fprintf (stream
, _("\
327 --help show this message and exit\n"));
328 fprintf (stream
, _("\
329 --target-help show target specific options\n"));
330 fprintf (stream
, _("\
331 -I DIR add DIR to search list for .include directives\n"));
332 fprintf (stream
, _("\
333 -J don't warn about signed overflow\n"));
334 fprintf (stream
, _("\
335 -K warn when differences altered for long displacements\n"));
336 fprintf (stream
, _("\
337 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
338 fprintf (stream
, _("\
339 -M,--mri assemble in MRI compatibility mode\n"));
340 fprintf (stream
, _("\
341 --MD FILE write dependency information in FILE (default none)\n"));
342 fprintf (stream
, _("\
344 fprintf (stream
, _("\
345 -no-pad-sections do not pad the end of sections to alignment boundaries\n"));
346 fprintf (stream
, _("\
347 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
348 fprintf (stream
, _("\
349 -R fold data section into text section\n"));
350 fprintf (stream
, _("\
351 --reduce-memory-overheads \n\
352 prefer smaller memory use at the cost of longer\n\
354 fprintf (stream
, _("\
355 --statistics print various measured statistics from execution\n"));
356 fprintf (stream
, _("\
357 --strip-local-absolute strip local absolute symbols\n"));
358 fprintf (stream
, _("\
359 --traditional-format Use same format as native assembler when possible\n"));
360 fprintf (stream
, _("\
361 --version print assembler version number and exit\n"));
362 fprintf (stream
, _("\
363 -W --no-warn suppress warnings\n"));
364 fprintf (stream
, _("\
365 --warn don't suppress warnings\n"));
366 fprintf (stream
, _("\
367 --fatal-warnings treat warnings as errors\n"));
369 fprintf (stream
, _("\
370 --itbl INSTTBL extend instruction set to include instructions\n\
371 matching the specifications defined in file INSTTBL\n"));
373 fprintf (stream
, _("\
375 fprintf (stream
, _("\
377 fprintf (stream
, _("\
378 -Z generate object file even after errors\n"));
379 fprintf (stream
, _("\
380 --listing-lhs-width set the width in words of the output data column of\n\
382 fprintf (stream
, _("\
383 --listing-lhs-width2 set the width in words of the continuation lines\n\
384 of the output data column; ignored if smaller than\n\
385 the width of the first line\n"));
386 fprintf (stream
, _("\
387 --listing-rhs-width set the max width in characters of the lines from\n\
388 the source file\n"));
389 fprintf (stream
, _("\
390 --listing-cont-lines set the maximum number of continuation lines used\n\
391 for the output data column of the listing\n"));
392 fprintf (stream
, _("\
393 @FILE read options from FILE\n"));
395 md_show_usage (stream
);
397 fputc ('\n', stream
);
399 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
400 fprintf (stream
, _("Report bugs to %s\n"), REPORT_BUGS_TO
);
403 /* Since it is easy to do here we interpret the special arg "-"
404 to mean "use stdin" and we set that argv[] pointing to "".
405 After we have munged argv[], the only things left are source file
406 name(s) and ""(s) denoting stdin. These file names are used
407 (perhaps more than once) later.
409 check for new machine-dep cmdline options in
410 md_parse_option definitions in config/tc-*.c. */
413 parse_args (int * pargc
, char *** pargv
)
419 /* Starting the short option string with '-' is for programs that
420 expect options and other ARGV-elements in any order and that care about
421 the ordering of the two. We describe each non-option ARGV-element
422 as if it were the argument of an option with character code 1. */
424 extern const char *md_shortopts
;
425 static const char std_shortopts
[] =
428 #ifndef WORKING_DOT_WORD
429 /* -K is not meaningful if .word is not being hacked. */
432 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
434 /* -v takes an argument on VMS, so we don't make it a generic
440 /* New option for extending instruction set (see also --itbl below). */
445 struct option
*longopts
;
446 extern struct option md_longopts
[];
447 extern size_t md_longopts_size
;
448 /* Codes used for the long options with no short synonyms. */
451 OPTION_HELP
= OPTION_STD_BASE
,
458 OPTION_DEBUG_PREFIX_MAP
,
460 OPTION_LISTING_LHS_WIDTH
,
461 OPTION_LISTING_LHS_WIDTH2
,
462 OPTION_LISTING_RHS_WIDTH
,
463 OPTION_LISTING_CONT_LINES
,
468 OPTION_GDWARF_SECTIONS
,
469 OPTION_STRIP_LOCAL_ABSOLUTE
,
470 OPTION_TRADITIONAL_FORMAT
,
476 OPTION_ELF_STT_COMMON
,
477 OPTION_SECTNAME_SUBST
,
480 OPTION_HASH_TABLE_SIZE
,
481 OPTION_REDUCE_MEMORY_OVERHEADS
,
483 OPTION_COMPRESS_DEBUG
,
484 OPTION_NOCOMPRESS_DEBUG
,
485 OPTION_NO_PAD_SECTIONS
/* = STD_BASE + 40 */
486 /* When you add options here, check that they do
487 not collide with OPTION_MD_BASE. See as.h. */
490 static const struct option std_longopts
[] =
492 /* Note: commas are placed at the start of the line rather than
493 the end of the preceding line so that it is simpler to
494 selectively add and remove lines from this list. */
495 {"alternate", no_argument
, NULL
, OPTION_ALTERNATE
}
496 /* The entry for "a" is here to prevent getopt_long_only() from
497 considering that -a is an abbreviation for --alternate. This is
498 necessary because -a=<FILE> is a valid switch but getopt would
499 normally reject it since --alternate does not take an argument. */
500 ,{"a", optional_argument
, NULL
, 'a'}
501 /* Handle -al=<FILE>. */
502 ,{"al", optional_argument
, NULL
, OPTION_AL
}
503 ,{"compress-debug-sections", optional_argument
, NULL
, OPTION_COMPRESS_DEBUG
}
504 ,{"nocompress-debug-sections", no_argument
, NULL
, OPTION_NOCOMPRESS_DEBUG
}
505 ,{"debug-prefix-map", required_argument
, NULL
, OPTION_DEBUG_PREFIX_MAP
}
506 ,{"defsym", required_argument
, NULL
, OPTION_DEFSYM
}
507 ,{"dump-config", no_argument
, NULL
, OPTION_DUMPCONFIG
}
508 ,{"emulation", required_argument
, NULL
, OPTION_EMULATION
}
509 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
510 ,{"execstack", no_argument
, NULL
, OPTION_EXECSTACK
}
511 ,{"noexecstack", no_argument
, NULL
, OPTION_NOEXECSTACK
}
512 ,{"size-check", required_argument
, NULL
, OPTION_SIZE_CHECK
}
513 ,{"elf-stt-common", required_argument
, NULL
, OPTION_ELF_STT_COMMON
}
514 ,{"sectname-subst", no_argument
, NULL
, OPTION_SECTNAME_SUBST
}
516 ,{"fatal-warnings", no_argument
, NULL
, OPTION_WARN_FATAL
}
517 ,{"gdwarf-2", no_argument
, NULL
, OPTION_GDWARF2
}
518 /* GCC uses --gdwarf-2 but GAS uses to use --gdwarf2,
519 so we keep it here for backwards compatibility. */
520 ,{"gdwarf2", no_argument
, NULL
, OPTION_GDWARF2
}
521 ,{"gdwarf-sections", no_argument
, NULL
, OPTION_GDWARF_SECTIONS
}
522 ,{"gen-debug", no_argument
, NULL
, 'g'}
523 ,{"gstabs", no_argument
, NULL
, OPTION_GSTABS
}
524 ,{"gstabs+", no_argument
, NULL
, OPTION_GSTABS_PLUS
}
525 ,{"hash-size", required_argument
, NULL
, OPTION_HASH_TABLE_SIZE
}
526 ,{"help", no_argument
, NULL
, OPTION_HELP
}
528 /* New option for extending instruction set (see also -t above).
529 The "-t file" or "--itbl file" option extends the basic set of
530 valid instructions by reading "file", a text file containing a
531 list of instruction formats. The additional opcodes and their
532 formats are added to the built-in set of instructions, and
533 mnemonics for new registers may also be defined. */
534 ,{"itbl", required_argument
, NULL
, 't'}
536 /* getopt allows abbreviations, so we do this to stop it from
537 treating -k as an abbreviation for --keep-locals. Some
538 ports use -k to enable PIC assembly. */
539 ,{"keep-locals", no_argument
, NULL
, 'L'}
540 ,{"keep-locals", no_argument
, NULL
, 'L'}
541 ,{"listing-lhs-width", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH
}
542 ,{"listing-lhs-width2", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH2
}
543 ,{"listing-rhs-width", required_argument
, NULL
, OPTION_LISTING_RHS_WIDTH
}
544 ,{"listing-cont-lines", required_argument
, NULL
, OPTION_LISTING_CONT_LINES
}
545 ,{"MD", required_argument
, NULL
, OPTION_DEPFILE
}
546 ,{"mri", no_argument
, NULL
, 'M'}
547 ,{"nocpp", no_argument
, NULL
, OPTION_NOCPP
}
548 ,{"no-pad-sections", no_argument
, NULL
, OPTION_NO_PAD_SECTIONS
}
549 ,{"no-warn", no_argument
, NULL
, 'W'}
550 ,{"reduce-memory-overheads", no_argument
, NULL
, OPTION_REDUCE_MEMORY_OVERHEADS
}
551 ,{"statistics", no_argument
, NULL
, OPTION_STATISTICS
}
552 ,{"strip-local-absolute", no_argument
, NULL
, OPTION_STRIP_LOCAL_ABSOLUTE
}
553 ,{"version", no_argument
, NULL
, OPTION_VERSION
}
554 ,{"verbose", no_argument
, NULL
, OPTION_VERBOSE
}
555 ,{"target-help", no_argument
, NULL
, OPTION_TARGET_HELP
}
556 ,{"traditional-format", no_argument
, NULL
, OPTION_TRADITIONAL_FORMAT
}
557 ,{"warn", no_argument
, NULL
, OPTION_WARN
}
560 /* Construct the option lists from the standard list and the target
561 dependent list. Include space for an extra NULL option and
562 always NULL terminate. */
563 shortopts
= concat (std_shortopts
, md_shortopts
, (char *) NULL
);
564 longopts
= (struct option
*) xmalloc (sizeof (std_longopts
)
565 + md_longopts_size
+ sizeof (struct option
));
566 memcpy (longopts
, std_longopts
, sizeof (std_longopts
));
567 memcpy (((char *) longopts
) + sizeof (std_longopts
), md_longopts
, md_longopts_size
);
568 memset (((char *) longopts
) + sizeof (std_longopts
) + md_longopts_size
,
569 0, sizeof (struct option
));
571 /* Make a local copy of the old argv. */
575 /* Initialize a new argv that contains no options. */
576 new_argv
= XNEWVEC (char *, old_argc
+ 1);
577 new_argv
[0] = old_argv
[0];
579 new_argv
[new_argc
] = NULL
;
583 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
584 indicate a long option. */
586 int optc
= getopt_long_only (old_argc
, old_argv
, shortopts
, longopts
,
595 /* md_parse_option should return 1 if it recognizes optc,
597 if (md_parse_option (optc
, optarg
) != 0)
599 /* `-v' isn't included in the general short_opts list, so check for
600 it explicitly here before deciding we've gotten a bad argument. */
604 /* Telling getopt to treat -v's value as optional can result
605 in it picking up a following filename argument here. The
606 VMS code in md_parse_option can return 0 in that case,
607 but it has no way of pushing the filename argument back. */
608 if (optarg
&& *optarg
)
609 new_argv
[new_argc
++] = optarg
, new_argv
[new_argc
] = NULL
;
620 as_bad (_("unrecognized option -%c%s"), optc
, optarg
? optarg
: "");
626 case 1: /* File name. */
627 if (!strcmp (optarg
, "-"))
628 optarg
= (char *) "";
629 new_argv
[new_argc
++] = optarg
;
630 new_argv
[new_argc
] = NULL
;
633 case OPTION_TARGET_HELP
:
634 md_show_usage (stdout
);
644 case OPTION_NO_PAD_SECTIONS
:
645 do_not_pad_sections_to_alignment
= 1;
648 case OPTION_STATISTICS
:
649 flag_print_statistics
= 1;
652 case OPTION_STRIP_LOCAL_ABSOLUTE
:
653 flag_strip_local_absolute
= 1;
656 case OPTION_TRADITIONAL_FORMAT
:
657 flag_traditional_format
= 1;
661 /* This output is intended to follow the GNU standards document. */
662 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING
);
663 printf (_("Copyright (C) 2016 Free Software Foundation, Inc.\n"));
665 This program is free software; you may redistribute it under the terms of\n\
666 the GNU General Public License version 3 or later.\n\
667 This program has absolutely no warranty.\n"));
668 printf (_("This assembler was configured for a target of `%s'.\n"),
672 case OPTION_EMULATION
:
673 #ifdef USE_EMULATIONS
674 if (strcmp (optarg
, this_emulation
->name
))
675 as_fatal (_("multiple emulation names specified"));
677 as_fatal (_("emulations not handled in this configuration"));
681 case OPTION_DUMPCONFIG
:
682 fprintf (stderr
, _("alias = %s\n"), TARGET_ALIAS
);
683 fprintf (stderr
, _("canonical = %s\n"), TARGET_CANONICAL
);
684 fprintf (stderr
, _("cpu-type = %s\n"), TARGET_CPU
);
685 #ifdef TARGET_OBJ_FORMAT
686 fprintf (stderr
, _("format = %s\n"), TARGET_OBJ_FORMAT
);
689 fprintf (stderr
, _("bfd-target = %s\n"), TARGET_FORMAT
);
693 case OPTION_COMPRESS_DEBUG
:
696 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
697 if (strcasecmp (optarg
, "none") == 0)
698 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
699 else if (strcasecmp (optarg
, "zlib") == 0)
700 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
701 else if (strcasecmp (optarg
, "zlib-gnu") == 0)
702 flag_compress_debug
= COMPRESS_DEBUG_GNU_ZLIB
;
703 else if (strcasecmp (optarg
, "zlib-gabi") == 0)
704 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
706 as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
709 as_fatal (_("--compress-debug-sections=%s is unsupported"),
714 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
717 case OPTION_NOCOMPRESS_DEBUG
:
718 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
721 case OPTION_DEBUG_PREFIX_MAP
:
722 add_debug_prefix_map (optarg
);
729 struct defsym_list
*n
;
731 for (s
= optarg
; *s
!= '\0' && *s
!= '='; s
++)
734 as_fatal (_("bad defsym; format is --defsym name=value"));
736 i
= bfd_scan_vma (s
, (const char **) NULL
, 0);
737 n
= XNEW (struct defsym_list
);
748 /* optarg is the name of the file containing the instruction
749 formats, opcodes, register names, etc. */
750 struct itbl_file_list
*n
;
754 as_warn (_("no file name following -t option"));
758 n
= XNEW (struct itbl_file_list
);
759 n
->next
= itbl_files
;
763 /* Parse the file and add the new instructions to our internal
764 table. If multiple instruction tables are specified, the
765 information from this table gets appended onto the existing
767 itbl_files
->name
= xstrdup (optarg
);
768 if (itbl_parse (itbl_files
->name
) != 0)
769 as_fatal (_("failed to read instruction table %s\n"),
776 start_dependencies (optarg
);
780 /* Some backends, eg Alpha and Mips, use the -g switch for their
781 own purposes. So we check here for an explicit -g and allow
782 the backend to decide if it wants to process it. */
783 if ( old_argv
[optind
- 1][1] == 'g'
784 && md_parse_option (optc
, optarg
))
787 if (md_debug_format_selector
)
788 debug_type
= md_debug_format_selector (& use_gnu_debug_info_extensions
);
790 debug_type
= DEBUG_DWARF2
;
792 debug_type
= DEBUG_STABS
;
795 case OPTION_GSTABS_PLUS
:
796 use_gnu_debug_info_extensions
= 1;
799 debug_type
= DEBUG_STABS
;
803 debug_type
= DEBUG_DWARF2
;
806 case OPTION_GDWARF_SECTIONS
:
807 flag_dwarf_sections
= TRUE
;
811 flag_signed_overflow_ok
= 1;
814 #ifndef WORKING_DOT_WORD
816 flag_warn_displacement
= 1;
820 flag_keep_locals
= 1;
823 case OPTION_LISTING_LHS_WIDTH
:
824 listing_lhs_width
= atoi (optarg
);
825 if (listing_lhs_width_second
< listing_lhs_width
)
826 listing_lhs_width_second
= listing_lhs_width
;
828 case OPTION_LISTING_LHS_WIDTH2
:
830 int tmp
= atoi (optarg
);
832 if (tmp
> listing_lhs_width
)
833 listing_lhs_width_second
= tmp
;
836 case OPTION_LISTING_RHS_WIDTH
:
837 listing_rhs_width
= atoi (optarg
);
839 case OPTION_LISTING_CONT_LINES
:
840 listing_lhs_cont_lines
= atoi (optarg
);
851 flag_readonly_data_in_text
= 1;
855 flag_no_warnings
= 1;
859 flag_no_warnings
= 0;
860 flag_fatal_warnings
= 0;
863 case OPTION_WARN_FATAL
:
864 flag_no_warnings
= 0;
865 flag_fatal_warnings
= 1;
868 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
869 case OPTION_EXECSTACK
:
871 flag_noexecstack
= 0;
874 case OPTION_NOEXECSTACK
:
875 flag_noexecstack
= 1;
879 case OPTION_SIZE_CHECK
:
880 if (strcasecmp (optarg
, "error") == 0)
881 flag_allow_nonconst_size
= FALSE
;
882 else if (strcasecmp (optarg
, "warning") == 0)
883 flag_allow_nonconst_size
= TRUE
;
885 as_fatal (_("Invalid --size-check= option: `%s'"), optarg
);
888 case OPTION_ELF_STT_COMMON
:
889 if (strcasecmp (optarg
, "no") == 0)
890 flag_use_elf_stt_common
= 0;
891 else if (strcasecmp (optarg
, "yes") == 0)
892 flag_use_elf_stt_common
= 1;
894 as_fatal (_("Invalid --elf-stt-common= option: `%s'"),
898 case OPTION_SECTNAME_SUBST
:
899 flag_sectname_subst
= 1;
903 flag_always_generate_output
= 1;
907 listing
|= LISTING_LISTING
;
909 listing_filename
= xstrdup (optarg
);
912 case OPTION_ALTERNATE
:
913 optarg
= old_argv
[optind
- 1];
914 while (* optarg
== '-')
917 if (strcmp (optarg
, "alternate") == 0)
919 flag_macro_alternate
= 1;
928 if (optarg
!= old_argv
[optind
] && optarg
[-1] == '=')
931 if (md_parse_option (optc
, optarg
) != 0)
939 listing
|= LISTING_NOCOND
;
942 listing
|= LISTING_NODEBUG
;
945 listing
|= LISTING_GENERAL
;
948 listing
|= LISTING_HLL
;
951 listing
|= LISTING_LISTING
;
954 listing
|= LISTING_MACEXP
;
957 listing
|= LISTING_NOFORM
;
960 listing
|= LISTING_SYMBOLS
;
963 listing_filename
= xstrdup (optarg
+ 1);
964 optarg
+= strlen (listing_filename
);
967 as_fatal (_("invalid listing option `%c'"), *optarg
);
974 listing
= LISTING_DEFAULT
;
978 /* DEBUG is implemented: it debugs different
979 things from other people's assemblers. */
984 flag_no_comments
= 1;
988 { /* Include file directory. */
989 char *temp
= xstrdup (optarg
);
991 add_include_dir (temp
);
996 out_file_name
= xstrdup (optarg
);
1003 /* -X means treat warnings as errors. */
1006 case OPTION_REDUCE_MEMORY_OVERHEADS
:
1007 /* The only change we make at the moment is to reduce
1008 the size of the hash tables that we use. */
1009 set_gas_hash_table_size (4051);
1012 case OPTION_HASH_TABLE_SIZE
:
1014 unsigned long new_size
;
1016 new_size
= strtoul (optarg
, NULL
, 0);
1018 set_gas_hash_table_size (new_size
);
1020 as_fatal (_("--hash-size needs a numeric argument"));
1032 #ifdef md_after_parse_args
1033 md_after_parse_args ();
1038 dump_statistics (void)
1041 char *lim
= (char *) sbrk (0);
1043 long run_time
= get_run_time () - start_time
;
1045 fprintf (stderr
, _("%s: total time in assembly: %ld.%06ld\n"),
1046 myname
, run_time
/ 1000000, run_time
% 1000000);
1048 fprintf (stderr
, _("%s: data size %ld\n"),
1049 myname
, (long) (lim
- start_sbrk
));
1052 subsegs_print_statistics (stderr
);
1053 write_print_statistics (stderr
);
1054 symbol_print_statistics (stderr
);
1055 read_print_statistics (stderr
);
1057 #ifdef tc_print_statistics
1058 tc_print_statistics (stderr
);
1061 #ifdef obj_print_statistics
1062 obj_print_statistics (stderr
);
1067 close_output_file (void)
1069 output_file_close (out_file_name
);
1071 unlink_if_ordinary (out_file_name
);
1074 /* The interface between the macro code and gas expression handling. */
1077 macro_expr (const char *emsg
, size_t idx
, sb
*in
, offsetT
*val
)
1084 hold
= input_line_pointer
;
1085 input_line_pointer
= in
->ptr
+ idx
;
1086 expression_and_evaluate (&ex
);
1087 idx
= input_line_pointer
- in
->ptr
;
1088 input_line_pointer
= hold
;
1090 if (ex
.X_op
!= O_constant
)
1091 as_bad ("%s", emsg
);
1093 *val
= ex
.X_add_number
;
1098 /* Here to attempt 1 pass over each input file.
1099 We scan argv[*] looking for filenames or exactly "" which is
1100 shorthand for stdin. Any argv that is NULL is not a file-name.
1101 We set need_pass_2 TRUE if, after this, we still have unresolved
1102 expressions of the form (unknown value)+-(unknown value).
1104 Note the un*x semantics: there is only 1 logical input file, but it
1105 may be a catenation of many 'physical' input files. */
1108 perform_an_assembly_pass (int argc
, char ** argv
)
1112 flagword applicable
;
1118 /* Create the standard sections, and those the assembler uses
1120 text_section
= subseg_new (TEXT_SECTION_NAME
, 0);
1121 data_section
= subseg_new (DATA_SECTION_NAME
, 0);
1122 bss_section
= subseg_new (BSS_SECTION_NAME
, 0);
1123 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1124 to have relocs, otherwise we don't find out in time. */
1125 applicable
= bfd_applicable_section_flags (stdoutput
);
1126 bfd_set_section_flags (stdoutput
, text_section
,
1127 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1128 | SEC_CODE
| SEC_READONLY
));
1129 bfd_set_section_flags (stdoutput
, data_section
,
1130 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1132 bfd_set_section_flags (stdoutput
, bss_section
, applicable
& SEC_ALLOC
);
1133 seg_info (bss_section
)->bss
= 1;
1135 subseg_new (BFD_ABS_SECTION_NAME
, 0);
1136 subseg_new (BFD_UND_SECTION_NAME
, 0);
1137 reg_section
= subseg_new ("*GAS `reg' section*", 0);
1138 expr_section
= subseg_new ("*GAS `expr' section*", 0);
1141 subseg_set (text_section
, 0);
1144 /* This may add symbol table entries, which requires having an open BFD,
1145 and sections already created. */
1162 { /* Is it a file-name argument? */
1165 /* argv->"" if stdin desired, else->filename. */
1166 read_a_source_file (*argv
);
1168 argv
++; /* Completed that argv. */
1171 read_a_source_file ("");
1176 main (int argc
, char ** argv
)
1178 char ** argv_orig
= argv
;
1182 start_time
= get_run_time ();
1184 start_sbrk
= (char *) sbrk (0);
1187 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
1188 setlocale (LC_MESSAGES
, "");
1190 #if defined (HAVE_SETLOCALE)
1191 setlocale (LC_CTYPE
, "");
1193 bindtextdomain (PACKAGE
, LOCALEDIR
);
1194 textdomain (PACKAGE
);
1199 #ifdef HOST_SPECIAL_INIT
1200 HOST_SPECIAL_INIT (argc
, argv
);
1204 xmalloc_set_program_name (myname
);
1206 expandargv (&argc
, &argv
);
1208 START_PROGRESS (myname
, 0);
1210 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1211 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1214 out_file_name
= OBJ_DEFAULT_OUTPUT_FILE_NAME
;
1218 bfd_set_error_program_name (myname
);
1220 #ifdef USE_EMULATIONS
1221 select_emulation_mode (argc
, argv
);
1225 /* Call parse_args before any of the init/begin functions
1226 so that switches like --hash-size can be honored. */
1227 parse_args (&argc
, &argv
);
1232 input_scrub_begin ();
1235 /* It has to be called after dump_statistics (). */
1236 xatexit (close_output_file
);
1238 if (flag_print_statistics
)
1239 xatexit (dump_statistics
);
1243 macro_strip_at
= flag_mri
;
1246 macro_init (flag_macro_alternate
, flag_mri
, macro_strip_at
, macro_expr
);
1250 output_file_create (out_file_name
);
1251 gas_assert (stdoutput
!= 0);
1255 #ifdef tc_init_after_args
1256 tc_init_after_args ();
1263 local_symbol_make (".gasversion.", absolute_section
,
1264 BFD_VERSION
/ 10000UL, &predefined_address_frag
);
1266 /* Now that we have fully initialized, and have created the output
1267 file, define any symbols requested by --defsym command line
1269 while (defsyms
!= NULL
)
1272 struct defsym_list
*next
;
1274 sym
= symbol_new (defsyms
->name
, absolute_section
, defsyms
->value
,
1275 &zero_address_frag
);
1276 /* Make symbols defined on the command line volatile, so that they
1277 can be redefined inside a source file. This makes this assembler's
1278 behaviour compatible with earlier versions, but it may not be
1279 completely intuitive. */
1280 S_SET_VOLATILE (sym
);
1281 symbol_table_insert (sym
);
1282 next
= defsyms
->next
;
1290 perform_an_assembly_pass (argc
, argv
);
1292 cond_finish_check (-1);
1298 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1299 if ((flag_execstack
|| flag_noexecstack
)
1300 && OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
1304 gnustack
= subseg_new (".note.GNU-stack", 0);
1305 bfd_set_section_flags (stdoutput
, gnustack
,
1306 SEC_READONLY
| (flag_execstack
? SEC_CODE
: 0));
1311 /* If we've been collecting dwarf2 .debug_line info, either for
1312 assembly debugging or on behalf of the compiler, emit it now. */
1315 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1316 directives from the user or by the backend, emit it now. */
1320 if (seen_at_least_1_file ())
1322 int n_warns
, n_errs
;
1326 write_object_file ();
1328 n_warns
= had_warnings ();
1329 n_errs
= had_errors ();
1332 sprintf (warn_msg
, _("%d warning"), n_warns
);
1334 sprintf (warn_msg
, _("%d warnings"), n_warns
);
1336 sprintf (err_msg
, _("%d error"), n_errs
);
1338 sprintf (err_msg
, _("%d errors"), n_errs
);
1340 if (flag_fatal_warnings
&& n_warns
!= 0)
1343 as_bad (_("%s, treating warnings as errors"), warn_msg
);
1349 else if (flag_always_generate_output
)
1351 /* The -Z flag indicates that an object file should be generated,
1352 regardless of warnings and errors. */
1354 fprintf (stderr
, _("%s, %s, generating bad object file\n"),
1362 listing_print (listing_filename
, argv_orig
);
1367 END_PROGRESS (myname
);
1369 /* Use xexit instead of return, because under VMS environments they
1370 may not place the same interpretation on the value given. */
1371 if (had_errors () != 0)
1372 xexit (EXIT_FAILURE
);
1374 /* Only generate dependency file if assembler was successful. */
1375 print_dependencies ();
1377 xexit (EXIT_SUCCESS
);