1 /* as.c - GAS main program.
2 Copyright (C) 1987-2018 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. */
34 /* Disable code to set FAKE_LABEL_NAME in obj-multi.h, to avoid circular
36 #define INITIALIZING_EMULS
40 #include "output-file.h"
43 #include "dwarf2dbg.h"
44 #include "dw2gencfi.h"
55 /* Perform any cgen specific initialisation for gas. */
56 extern void gas_cgen_begin (void);
59 /* We build a list of defsyms as we read the options, and then define
60 them after we have initialized everything. */
63 struct defsym_list
*next
;
69 /* True if a listing is wanted. */
72 /* Type of debugging to generate. */
73 enum debug_info_type debug_type
= DEBUG_UNSPECIFIED
;
74 int use_gnu_debug_info_extensions
= 0;
76 #ifndef MD_DEBUG_FORMAT_SELECTOR
77 #define MD_DEBUG_FORMAT_SELECTOR NULL
79 static enum debug_info_type (*md_debug_format_selector
) (int *) = MD_DEBUG_FORMAT_SELECTOR
;
81 /* Maximum level of macro nesting. */
82 int max_macro_nest
= 100;
87 /* The default obstack chunk size. If we set this to zero, the
88 obstack code will use whatever will fit in a 4096 byte block. */
91 /* To monitor memory allocation more effectively, make this non-zero.
92 Then the chunk sizes for gas and bfd will be reduced. */
95 /* Enable verbose mode. */
98 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
99 int flag_use_elf_stt_common
= DEFAULT_GENERATE_ELF_STT_COMMON
;
100 bfd_boolean flag_generate_build_notes
= DEFAULT_GENERATE_BUILD_NOTES
;
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
;
129 static int flag_macro_alternate
;
132 #ifdef USE_EMULATIONS
133 #define EMULATION_ENVIRON "AS_EMULATION"
135 extern struct emulation mipsbelf
, mipslelf
, mipself
;
136 extern struct emulation i386coff
, i386elf
, i386aout
;
137 extern struct emulation crisaout
, criself
;
139 static struct emulation
*const emulations
[] = { EMULATIONS
};
140 static const int n_emulations
= sizeof (emulations
) / sizeof (emulations
[0]);
143 select_emulation_mode (int argc
, char **argv
)
147 const char *em
= NULL
;
149 for (i
= 1; i
< argc
; i
++)
150 if (!strncmp ("--em", argv
[i
], 4))
156 p
= strchr (argv
[i
], '=');
163 as_fatal (_("missing emulation mode name"));
168 em
= getenv (EMULATION_ENVIRON
);
170 em
= DEFAULT_EMULATION
;
174 for (i
= 0; i
< n_emulations
; i
++)
175 if (!strcmp (emulations
[i
]->name
, em
))
177 if (i
== n_emulations
)
178 as_fatal (_("unrecognized emulation name `%s'"), em
);
179 this_emulation
= emulations
[i
];
182 this_emulation
= emulations
[0];
184 this_emulation
->init ();
188 default_emul_bfd_name (void)
195 common_emul_init (void)
197 this_format
= this_emulation
->format
;
199 if (this_emulation
->leading_underscore
== 2)
200 this_emulation
->leading_underscore
= this_format
->dfl_leading_underscore
;
202 if (this_emulation
->default_endian
!= 2)
203 target_big_endian
= this_emulation
->default_endian
;
205 if (this_emulation
->fake_label_name
== 0)
207 if (this_emulation
->leading_underscore
)
208 this_emulation
->fake_label_name
= FAKE_LABEL_NAME
;
210 /* What other parameters should we test? */
211 this_emulation
->fake_label_name
= "." FAKE_LABEL_NAME
;
217 print_version_id (void)
225 fprintf (stderr
, _("GNU assembler version %s (%s) using BFD version %s\n"),
226 VERSION
, TARGET_ALIAS
, BFD_VERSION_STRING
);
229 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
230 enum compressed_debug_section_type flag_compress_debug
231 = COMPRESS_DEBUG_GABI_ZLIB
;
235 show_usage (FILE * stream
)
237 fprintf (stream
, _("Usage: %s [option...] [asmfile...]\n"), myname
);
239 fprintf (stream
, _("\
241 -a[sub-option...] turn on listings\n\
242 Sub-options [default hls]:\n\
243 c omit false conditionals\n\
244 d omit debugging directives\n\
245 g include general info\n\
246 h include high-level source\n\
247 l include assembly\n\
248 m include macro expansions\n\
249 n omit forms processing\n\
251 =FILE list to FILE (must be last sub-option)\n"));
253 fprintf (stream
, _("\
254 --alternate initially turn on alternate macro syntax\n"));
255 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
256 fprintf (stream
, _("\
257 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
258 compress DWARF debug sections using zlib [default]\n"));
259 fprintf (stream
, _("\
260 --nocompress-debug-sections\n\
261 don't compress DWARF debug sections\n"));
263 fprintf (stream
, _("\
264 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
265 compress DWARF debug sections using zlib\n"));
266 fprintf (stream
, _("\
267 --nocompress-debug-sections\n\
268 don't compress DWARF debug sections [default]\n"));
270 fprintf (stream
, _("\
271 -D produce assembler debugging messages\n"));
272 fprintf (stream
, _("\
273 --debug-prefix-map OLD=NEW\n\
274 map OLD to NEW in debug information\n"));
275 fprintf (stream
, _("\
276 --defsym SYM=VAL define symbol SYM to given value\n"));
277 #ifdef USE_EMULATIONS
284 for (i
= 0; i
< n_emulations
- 1; i
++)
285 fprintf (stream
, "%s | ", emulations
[i
]->name
);
286 fprintf (stream
, "%s]\n", emulations
[i
]->name
);
288 def_em
= getenv (EMULATION_ENVIRON
);
290 def_em
= DEFAULT_EMULATION
;
291 fprintf (stream
, _("\
292 emulate output (default %s)\n"), def_em
);
295 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
296 fprintf (stream
, _("\
297 --execstack require executable stack for this object\n"));
298 fprintf (stream
, _("\
299 --noexecstack don't require executable stack for this object\n"));
300 fprintf (stream
, _("\
301 --size-check=[error|warning]\n\
302 ELF .size directive check (default --size-check=error)\n"));
303 fprintf (stream
, _("\
304 --elf-stt-common=[no|yes]\n\
305 generate ELF common symbols with STT_COMMON type\n"));
306 fprintf (stream
, _("\
307 --sectname-subst enable section name substitution sequences\n"));
309 fprintf (stream
, _("\
310 --generate-missing-build-notes=[no|yes] "));
311 #if DEFAULT_GENERATE_BUILD_NOTES
312 fprintf (stream
, _("(default: yes)\n"));
314 fprintf (stream
, _("(default: no)\n"));
316 fprintf (stream
, _("\
317 generate GNU Build notes if none are present in the input\n"));
320 fprintf (stream
, _("\
321 -f skip whitespace and comment preprocessing\n"));
322 fprintf (stream
, _("\
323 -g --gen-debug generate debugging information\n"));
324 fprintf (stream
, _("\
325 --gstabs generate STABS debugging information\n"));
326 fprintf (stream
, _("\
327 --gstabs+ generate STABS debug info with GNU extensions\n"));
328 fprintf (stream
, _("\
329 --gdwarf-2 generate DWARF2 debugging information\n"));
330 fprintf (stream
, _("\
331 --gdwarf-sections generate per-function section names for DWARF line information\n"));
332 fprintf (stream
, _("\
333 --hash-size=<value> set the hash table size close to <value>\n"));
334 fprintf (stream
, _("\
335 --help show this message and exit\n"));
336 fprintf (stream
, _("\
337 --target-help show target specific options\n"));
338 fprintf (stream
, _("\
339 -I DIR add DIR to search list for .include directives\n"));
340 fprintf (stream
, _("\
341 -J don't warn about signed overflow\n"));
342 fprintf (stream
, _("\
343 -K warn when differences altered for long displacements\n"));
344 fprintf (stream
, _("\
345 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
346 fprintf (stream
, _("\
347 -M,--mri assemble in MRI compatibility mode\n"));
348 fprintf (stream
, _("\
349 --MD FILE write dependency information in FILE (default none)\n"));
350 fprintf (stream
, _("\
352 fprintf (stream
, _("\
353 -no-pad-sections do not pad the end of sections to alignment boundaries\n"));
354 fprintf (stream
, _("\
355 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
356 fprintf (stream
, _("\
357 -R fold data section into text section\n"));
358 fprintf (stream
, _("\
359 --reduce-memory-overheads \n\
360 prefer smaller memory use at the cost of longer\n\
362 fprintf (stream
, _("\
363 --statistics print various measured statistics from execution\n"));
364 fprintf (stream
, _("\
365 --strip-local-absolute strip local absolute symbols\n"));
366 fprintf (stream
, _("\
367 --traditional-format Use same format as native assembler when possible\n"));
368 fprintf (stream
, _("\
369 --version print assembler version number and exit\n"));
370 fprintf (stream
, _("\
371 -W --no-warn suppress warnings\n"));
372 fprintf (stream
, _("\
373 --warn don't suppress warnings\n"));
374 fprintf (stream
, _("\
375 --fatal-warnings treat warnings as errors\n"));
377 fprintf (stream
, _("\
378 --itbl INSTTBL extend instruction set to include instructions\n\
379 matching the specifications defined in file INSTTBL\n"));
381 fprintf (stream
, _("\
383 fprintf (stream
, _("\
385 fprintf (stream
, _("\
386 -Z generate object file even after errors\n"));
387 fprintf (stream
, _("\
388 --listing-lhs-width set the width in words of the output data column of\n\
390 fprintf (stream
, _("\
391 --listing-lhs-width2 set the width in words of the continuation lines\n\
392 of the output data column; ignored if smaller than\n\
393 the width of the first line\n"));
394 fprintf (stream
, _("\
395 --listing-rhs-width set the max width in characters of the lines from\n\
396 the source file\n"));
397 fprintf (stream
, _("\
398 --listing-cont-lines set the maximum number of continuation lines used\n\
399 for the output data column of the listing\n"));
400 fprintf (stream
, _("\
401 @FILE read options from FILE\n"));
403 md_show_usage (stream
);
405 fputc ('\n', stream
);
407 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
408 fprintf (stream
, _("Report bugs to %s\n"), REPORT_BUGS_TO
);
411 /* Since it is easy to do here we interpret the special arg "-"
412 to mean "use stdin" and we set that argv[] pointing to "".
413 After we have munged argv[], the only things left are source file
414 name(s) and ""(s) denoting stdin. These file names are used
415 (perhaps more than once) later.
417 check for new machine-dep cmdline options in
418 md_parse_option definitions in config/tc-*.c. */
421 parse_args (int * pargc
, char *** pargv
)
427 /* Starting the short option string with '-' is for programs that
428 expect options and other ARGV-elements in any order and that care about
429 the ordering of the two. We describe each non-option ARGV-element
430 as if it were the argument of an option with character code 1. */
432 extern const char *md_shortopts
;
433 static const char std_shortopts
[] =
436 #ifndef WORKING_DOT_WORD
437 /* -K is not meaningful if .word is not being hacked. */
440 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
442 /* -v takes an argument on VMS, so we don't make it a generic
448 /* New option for extending instruction set (see also --itbl below). */
453 struct option
*longopts
;
454 extern struct option md_longopts
[];
455 extern size_t md_longopts_size
;
456 /* Codes used for the long options with no short synonyms. */
459 OPTION_HELP
= OPTION_STD_BASE
,
466 OPTION_DEBUG_PREFIX_MAP
,
468 OPTION_LISTING_LHS_WIDTH
,
469 OPTION_LISTING_LHS_WIDTH2
,
470 OPTION_LISTING_RHS_WIDTH
,
471 OPTION_LISTING_CONT_LINES
,
476 OPTION_GDWARF_SECTIONS
,
477 OPTION_STRIP_LOCAL_ABSOLUTE
,
478 OPTION_TRADITIONAL_FORMAT
,
484 OPTION_ELF_STT_COMMON
,
485 OPTION_ELF_BUILD_NOTES
,
486 OPTION_SECTNAME_SUBST
,
489 OPTION_HASH_TABLE_SIZE
,
490 OPTION_REDUCE_MEMORY_OVERHEADS
,
492 OPTION_COMPRESS_DEBUG
,
493 OPTION_NOCOMPRESS_DEBUG
,
494 OPTION_NO_PAD_SECTIONS
/* = STD_BASE + 40 */
495 /* When you add options here, check that they do
496 not collide with OPTION_MD_BASE. See as.h. */
499 static const struct option std_longopts
[] =
501 /* Note: commas are placed at the start of the line rather than
502 the end of the preceding line so that it is simpler to
503 selectively add and remove lines from this list. */
504 {"alternate", no_argument
, NULL
, OPTION_ALTERNATE
}
505 /* The entry for "a" is here to prevent getopt_long_only() from
506 considering that -a is an abbreviation for --alternate. This is
507 necessary because -a=<FILE> is a valid switch but getopt would
508 normally reject it since --alternate does not take an argument. */
509 ,{"a", optional_argument
, NULL
, 'a'}
510 /* Handle -al=<FILE>. */
511 ,{"al", optional_argument
, NULL
, OPTION_AL
}
512 ,{"compress-debug-sections", optional_argument
, NULL
, OPTION_COMPRESS_DEBUG
}
513 ,{"nocompress-debug-sections", no_argument
, NULL
, OPTION_NOCOMPRESS_DEBUG
}
514 ,{"debug-prefix-map", required_argument
, NULL
, OPTION_DEBUG_PREFIX_MAP
}
515 ,{"defsym", required_argument
, NULL
, OPTION_DEFSYM
}
516 ,{"dump-config", no_argument
, NULL
, OPTION_DUMPCONFIG
}
517 ,{"emulation", required_argument
, NULL
, OPTION_EMULATION
}
518 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
519 ,{"execstack", no_argument
, NULL
, OPTION_EXECSTACK
}
520 ,{"noexecstack", no_argument
, NULL
, OPTION_NOEXECSTACK
}
521 ,{"size-check", required_argument
, NULL
, OPTION_SIZE_CHECK
}
522 ,{"elf-stt-common", required_argument
, NULL
, OPTION_ELF_STT_COMMON
}
523 ,{"sectname-subst", no_argument
, NULL
, OPTION_SECTNAME_SUBST
}
524 ,{"generate-missing-build-notes", required_argument
, NULL
, OPTION_ELF_BUILD_NOTES
}
526 ,{"fatal-warnings", no_argument
, NULL
, OPTION_WARN_FATAL
}
527 ,{"gdwarf-2", no_argument
, NULL
, OPTION_GDWARF2
}
528 /* GCC uses --gdwarf-2 but GAS uses to use --gdwarf2,
529 so we keep it here for backwards compatibility. */
530 ,{"gdwarf2", no_argument
, NULL
, OPTION_GDWARF2
}
531 ,{"gdwarf-sections", no_argument
, NULL
, OPTION_GDWARF_SECTIONS
}
532 ,{"gen-debug", no_argument
, NULL
, 'g'}
533 ,{"gstabs", no_argument
, NULL
, OPTION_GSTABS
}
534 ,{"gstabs+", no_argument
, NULL
, OPTION_GSTABS_PLUS
}
535 ,{"hash-size", required_argument
, NULL
, OPTION_HASH_TABLE_SIZE
}
536 ,{"help", no_argument
, NULL
, OPTION_HELP
}
538 /* New option for extending instruction set (see also -t above).
539 The "-t file" or "--itbl file" option extends the basic set of
540 valid instructions by reading "file", a text file containing a
541 list of instruction formats. The additional opcodes and their
542 formats are added to the built-in set of instructions, and
543 mnemonics for new registers may also be defined. */
544 ,{"itbl", required_argument
, NULL
, 't'}
546 /* getopt allows abbreviations, so we do this to stop it from
547 treating -k as an abbreviation for --keep-locals. Some
548 ports use -k to enable PIC assembly. */
549 ,{"keep-locals", no_argument
, NULL
, 'L'}
550 ,{"keep-locals", no_argument
, NULL
, 'L'}
551 ,{"listing-lhs-width", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH
}
552 ,{"listing-lhs-width2", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH2
}
553 ,{"listing-rhs-width", required_argument
, NULL
, OPTION_LISTING_RHS_WIDTH
}
554 ,{"listing-cont-lines", required_argument
, NULL
, OPTION_LISTING_CONT_LINES
}
555 ,{"MD", required_argument
, NULL
, OPTION_DEPFILE
}
556 ,{"mri", no_argument
, NULL
, 'M'}
557 ,{"nocpp", no_argument
, NULL
, OPTION_NOCPP
}
558 ,{"no-pad-sections", no_argument
, NULL
, OPTION_NO_PAD_SECTIONS
}
559 ,{"no-warn", no_argument
, NULL
, 'W'}
560 ,{"reduce-memory-overheads", no_argument
, NULL
, OPTION_REDUCE_MEMORY_OVERHEADS
}
561 ,{"statistics", no_argument
, NULL
, OPTION_STATISTICS
}
562 ,{"strip-local-absolute", no_argument
, NULL
, OPTION_STRIP_LOCAL_ABSOLUTE
}
563 ,{"version", no_argument
, NULL
, OPTION_VERSION
}
564 ,{"verbose", no_argument
, NULL
, OPTION_VERBOSE
}
565 ,{"target-help", no_argument
, NULL
, OPTION_TARGET_HELP
}
566 ,{"traditional-format", no_argument
, NULL
, OPTION_TRADITIONAL_FORMAT
}
567 ,{"warn", no_argument
, NULL
, OPTION_WARN
}
570 /* Construct the option lists from the standard list and the target
571 dependent list. Include space for an extra NULL option and
572 always NULL terminate. */
573 shortopts
= concat (std_shortopts
, md_shortopts
, (char *) NULL
);
574 longopts
= (struct option
*) xmalloc (sizeof (std_longopts
)
575 + md_longopts_size
+ sizeof (struct option
));
576 memcpy (longopts
, std_longopts
, sizeof (std_longopts
));
577 memcpy (((char *) longopts
) + sizeof (std_longopts
), md_longopts
, md_longopts_size
);
578 memset (((char *) longopts
) + sizeof (std_longopts
) + md_longopts_size
,
579 0, sizeof (struct option
));
581 /* Make a local copy of the old argv. */
585 /* Initialize a new argv that contains no options. */
586 new_argv
= XNEWVEC (char *, old_argc
+ 1);
587 new_argv
[0] = old_argv
[0];
589 new_argv
[new_argc
] = NULL
;
593 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
594 indicate a long option. */
596 int optc
= getopt_long_only (old_argc
, old_argv
, shortopts
, longopts
,
605 /* md_parse_option should return 1 if it recognizes optc,
607 if (md_parse_option (optc
, optarg
) != 0)
609 /* `-v' isn't included in the general short_opts list, so check for
610 it explicitly here before deciding we've gotten a bad argument. */
614 /* Telling getopt to treat -v's value as optional can result
615 in it picking up a following filename argument here. The
616 VMS code in md_parse_option can return 0 in that case,
617 but it has no way of pushing the filename argument back. */
618 if (optarg
&& *optarg
)
619 new_argv
[new_argc
++] = optarg
, new_argv
[new_argc
] = NULL
;
630 as_bad (_("unrecognized option -%c%s"), optc
, optarg
? optarg
: "");
636 case 1: /* File name. */
637 if (!strcmp (optarg
, "-"))
638 optarg
= (char *) "";
639 new_argv
[new_argc
++] = optarg
;
640 new_argv
[new_argc
] = NULL
;
643 case OPTION_TARGET_HELP
:
644 md_show_usage (stdout
);
654 case OPTION_NO_PAD_SECTIONS
:
655 do_not_pad_sections_to_alignment
= 1;
658 case OPTION_STATISTICS
:
659 flag_print_statistics
= 1;
662 case OPTION_STRIP_LOCAL_ABSOLUTE
:
663 flag_strip_local_absolute
= 1;
666 case OPTION_TRADITIONAL_FORMAT
:
667 flag_traditional_format
= 1;
671 /* This output is intended to follow the GNU standards document. */
672 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING
);
673 printf (_("Copyright (C) 2018 Free Software Foundation, Inc.\n"));
675 This program is free software; you may redistribute it under the terms of\n\
676 the GNU General Public License version 3 or later.\n\
677 This program has absolutely no warranty.\n"));
678 #ifdef TARGET_WITH_CPU
679 printf (_("This assembler was configured for a target of `%s' "
680 "and default,\ncpu type `%s'.\n"),
681 TARGET_ALIAS
, TARGET_WITH_CPU
);
683 printf (_("This assembler was configured for a target of `%s'.\n"),
688 case OPTION_EMULATION
:
689 #ifdef USE_EMULATIONS
690 if (strcmp (optarg
, this_emulation
->name
))
691 as_fatal (_("multiple emulation names specified"));
693 as_fatal (_("emulations not handled in this configuration"));
697 case OPTION_DUMPCONFIG
:
698 fprintf (stderr
, _("alias = %s\n"), TARGET_ALIAS
);
699 fprintf (stderr
, _("canonical = %s\n"), TARGET_CANONICAL
);
700 fprintf (stderr
, _("cpu-type = %s\n"), TARGET_CPU
);
701 #ifdef TARGET_OBJ_FORMAT
702 fprintf (stderr
, _("format = %s\n"), TARGET_OBJ_FORMAT
);
705 fprintf (stderr
, _("bfd-target = %s\n"), TARGET_FORMAT
);
709 case OPTION_COMPRESS_DEBUG
:
712 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
713 if (strcasecmp (optarg
, "none") == 0)
714 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
715 else if (strcasecmp (optarg
, "zlib") == 0)
716 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
717 else if (strcasecmp (optarg
, "zlib-gnu") == 0)
718 flag_compress_debug
= COMPRESS_DEBUG_GNU_ZLIB
;
719 else if (strcasecmp (optarg
, "zlib-gabi") == 0)
720 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
722 as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
725 as_fatal (_("--compress-debug-sections=%s is unsupported"),
730 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
733 case OPTION_NOCOMPRESS_DEBUG
:
734 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
737 case OPTION_DEBUG_PREFIX_MAP
:
738 add_debug_prefix_map (optarg
);
745 struct defsym_list
*n
;
747 for (s
= optarg
; *s
!= '\0' && *s
!= '='; s
++)
750 as_fatal (_("bad defsym; format is --defsym name=value"));
752 i
= bfd_scan_vma (s
, (const char **) NULL
, 0);
753 n
= XNEW (struct defsym_list
);
764 /* optarg is the name of the file containing the instruction
765 formats, opcodes, register names, etc. */
766 struct itbl_file_list
*n
;
770 as_warn (_("no file name following -t option"));
774 n
= XNEW (struct itbl_file_list
);
775 n
->next
= itbl_files
;
779 /* Parse the file and add the new instructions to our internal
780 table. If multiple instruction tables are specified, the
781 information from this table gets appended onto the existing
783 itbl_files
->name
= xstrdup (optarg
);
784 if (itbl_parse (itbl_files
->name
) != 0)
785 as_fatal (_("failed to read instruction table %s\n"),
792 start_dependencies (optarg
);
796 /* Some backends, eg Alpha and Mips, use the -g switch for their
797 own purposes. So we check here for an explicit -g and allow
798 the backend to decide if it wants to process it. */
799 if ( old_argv
[optind
- 1][1] == 'g'
800 && md_parse_option (optc
, optarg
))
803 if (md_debug_format_selector
)
804 debug_type
= md_debug_format_selector (& use_gnu_debug_info_extensions
);
806 debug_type
= DEBUG_DWARF2
;
808 debug_type
= DEBUG_STABS
;
811 case OPTION_GSTABS_PLUS
:
812 use_gnu_debug_info_extensions
= 1;
815 debug_type
= DEBUG_STABS
;
819 debug_type
= DEBUG_DWARF2
;
822 case OPTION_GDWARF_SECTIONS
:
823 flag_dwarf_sections
= TRUE
;
827 flag_signed_overflow_ok
= 1;
830 #ifndef WORKING_DOT_WORD
832 flag_warn_displacement
= 1;
836 flag_keep_locals
= 1;
839 case OPTION_LISTING_LHS_WIDTH
:
840 listing_lhs_width
= atoi (optarg
);
841 if (listing_lhs_width_second
< listing_lhs_width
)
842 listing_lhs_width_second
= listing_lhs_width
;
844 case OPTION_LISTING_LHS_WIDTH2
:
846 int tmp
= atoi (optarg
);
848 if (tmp
> listing_lhs_width
)
849 listing_lhs_width_second
= tmp
;
852 case OPTION_LISTING_RHS_WIDTH
:
853 listing_rhs_width
= atoi (optarg
);
855 case OPTION_LISTING_CONT_LINES
:
856 listing_lhs_cont_lines
= atoi (optarg
);
867 flag_readonly_data_in_text
= 1;
871 flag_no_warnings
= 1;
875 flag_no_warnings
= 0;
876 flag_fatal_warnings
= 0;
879 case OPTION_WARN_FATAL
:
880 flag_no_warnings
= 0;
881 flag_fatal_warnings
= 1;
884 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
885 case OPTION_EXECSTACK
:
887 flag_noexecstack
= 0;
890 case OPTION_NOEXECSTACK
:
891 flag_noexecstack
= 1;
895 case OPTION_SIZE_CHECK
:
896 if (strcasecmp (optarg
, "error") == 0)
897 flag_allow_nonconst_size
= FALSE
;
898 else if (strcasecmp (optarg
, "warning") == 0)
899 flag_allow_nonconst_size
= TRUE
;
901 as_fatal (_("Invalid --size-check= option: `%s'"), optarg
);
904 case OPTION_ELF_STT_COMMON
:
905 if (strcasecmp (optarg
, "no") == 0)
906 flag_use_elf_stt_common
= 0;
907 else if (strcasecmp (optarg
, "yes") == 0)
908 flag_use_elf_stt_common
= 1;
910 as_fatal (_("Invalid --elf-stt-common= option: `%s'"),
914 case OPTION_SECTNAME_SUBST
:
915 flag_sectname_subst
= 1;
918 case OPTION_ELF_BUILD_NOTES
:
919 if (strcasecmp (optarg
, "no") == 0)
920 flag_generate_build_notes
= FALSE
;
921 else if (strcasecmp (optarg
, "yes") == 0)
922 flag_generate_build_notes
= TRUE
;
924 as_fatal (_("Invalid --generate-missing-build-notes option: `%s'"),
931 flag_always_generate_output
= 1;
935 listing
|= LISTING_LISTING
;
937 listing_filename
= xstrdup (optarg
);
940 case OPTION_ALTERNATE
:
941 optarg
= old_argv
[optind
- 1];
942 while (* optarg
== '-')
945 if (strcmp (optarg
, "alternate") == 0)
947 flag_macro_alternate
= 1;
956 if (optarg
!= old_argv
[optind
] && optarg
[-1] == '=')
959 if (md_parse_option (optc
, optarg
) != 0)
967 listing
|= LISTING_NOCOND
;
970 listing
|= LISTING_NODEBUG
;
973 listing
|= LISTING_GENERAL
;
976 listing
|= LISTING_HLL
;
979 listing
|= LISTING_LISTING
;
982 listing
|= LISTING_MACEXP
;
985 listing
|= LISTING_NOFORM
;
988 listing
|= LISTING_SYMBOLS
;
991 listing_filename
= xstrdup (optarg
+ 1);
992 optarg
+= strlen (listing_filename
);
995 as_fatal (_("invalid listing option `%c'"), *optarg
);
1002 listing
= LISTING_DEFAULT
;
1006 /* DEBUG is implemented: it debugs different
1007 things from other people's assemblers. */
1012 flag_no_comments
= 1;
1016 { /* Include file directory. */
1017 char *temp
= xstrdup (optarg
);
1019 add_include_dir (temp
);
1024 out_file_name
= xstrdup (optarg
);
1031 /* -X means treat warnings as errors. */
1034 case OPTION_REDUCE_MEMORY_OVERHEADS
:
1035 /* The only change we make at the moment is to reduce
1036 the size of the hash tables that we use. */
1037 set_gas_hash_table_size (4051);
1040 case OPTION_HASH_TABLE_SIZE
:
1042 unsigned long new_size
;
1044 new_size
= strtoul (optarg
, NULL
, 0);
1046 set_gas_hash_table_size (new_size
);
1048 as_fatal (_("--hash-size needs a numeric argument"));
1060 #ifdef md_after_parse_args
1061 md_after_parse_args ();
1066 dump_statistics (void)
1068 long run_time
= get_run_time () - start_time
;
1070 fprintf (stderr
, _("%s: total time in assembly: %ld.%06ld\n"),
1071 myname
, run_time
/ 1000000, run_time
% 1000000);
1073 subsegs_print_statistics (stderr
);
1074 write_print_statistics (stderr
);
1075 symbol_print_statistics (stderr
);
1076 read_print_statistics (stderr
);
1078 #ifdef tc_print_statistics
1079 tc_print_statistics (stderr
);
1082 #ifdef obj_print_statistics
1083 obj_print_statistics (stderr
);
1088 close_output_file (void)
1090 output_file_close (out_file_name
);
1092 unlink_if_ordinary (out_file_name
);
1095 /* The interface between the macro code and gas expression handling. */
1098 macro_expr (const char *emsg
, size_t idx
, sb
*in
, offsetT
*val
)
1105 hold
= input_line_pointer
;
1106 input_line_pointer
= in
->ptr
+ idx
;
1107 expression_and_evaluate (&ex
);
1108 idx
= input_line_pointer
- in
->ptr
;
1109 input_line_pointer
= hold
;
1111 if (ex
.X_op
!= O_constant
)
1112 as_bad ("%s", emsg
);
1114 *val
= ex
.X_add_number
;
1119 /* Here to attempt 1 pass over each input file.
1120 We scan argv[*] looking for filenames or exactly "" which is
1121 shorthand for stdin. Any argv that is NULL is not a file-name.
1122 We set need_pass_2 TRUE if, after this, we still have unresolved
1123 expressions of the form (unknown value)+-(unknown value).
1125 Note the un*x semantics: there is only 1 logical input file, but it
1126 may be a catenation of many 'physical' input files. */
1129 perform_an_assembly_pass (int argc
, char ** argv
)
1133 flagword applicable
;
1139 /* Create the standard sections, and those the assembler uses
1141 text_section
= subseg_new (TEXT_SECTION_NAME
, 0);
1142 data_section
= subseg_new (DATA_SECTION_NAME
, 0);
1143 bss_section
= subseg_new (BSS_SECTION_NAME
, 0);
1144 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1145 to have relocs, otherwise we don't find out in time. */
1146 applicable
= bfd_applicable_section_flags (stdoutput
);
1147 bfd_set_section_flags (stdoutput
, text_section
,
1148 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1149 | SEC_CODE
| SEC_READONLY
));
1150 bfd_set_section_flags (stdoutput
, data_section
,
1151 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1153 bfd_set_section_flags (stdoutput
, bss_section
, applicable
& SEC_ALLOC
);
1154 seg_info (bss_section
)->bss
= 1;
1156 subseg_new (BFD_ABS_SECTION_NAME
, 0);
1157 subseg_new (BFD_UND_SECTION_NAME
, 0);
1158 reg_section
= subseg_new ("*GAS `reg' section*", 0);
1159 expr_section
= subseg_new ("*GAS `expr' section*", 0);
1162 subseg_set (text_section
, 0);
1165 /* This may add symbol table entries, which requires having an open BFD,
1166 and sections already created. */
1183 { /* Is it a file-name argument? */
1186 /* argv->"" if stdin desired, else->filename. */
1187 read_a_source_file (*argv
);
1189 argv
++; /* Completed that argv. */
1192 read_a_source_file ("");
1197 main (int argc
, char ** argv
)
1199 char ** argv_orig
= argv
;
1204 start_time
= get_run_time ();
1207 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
1208 setlocale (LC_MESSAGES
, "");
1210 #if defined (HAVE_SETLOCALE)
1211 setlocale (LC_CTYPE
, "");
1213 bindtextdomain (PACKAGE
, LOCALEDIR
);
1214 textdomain (PACKAGE
);
1219 #ifdef HOST_SPECIAL_INIT
1220 HOST_SPECIAL_INIT (argc
, argv
);
1224 xmalloc_set_program_name (myname
);
1226 expandargv (&argc
, &argv
);
1228 START_PROGRESS (myname
, 0);
1230 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1231 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1234 out_file_name
= OBJ_DEFAULT_OUTPUT_FILE_NAME
;
1238 bfd_set_error_program_name (myname
);
1240 #ifdef USE_EMULATIONS
1241 select_emulation_mode (argc
, argv
);
1245 /* Call parse_args before any of the init/begin functions
1246 so that switches like --hash-size can be honored. */
1247 parse_args (&argc
, &argv
);
1249 if (argc
> 1 && stat (out_file_name
, &sob
) == 0)
1253 for (i
= 1; i
< argc
; ++i
)
1257 if (stat (argv
[i
], &sib
) == 0)
1259 if (sib
.st_ino
== sob
.st_ino
&& sib
.st_ino
!= 0)
1261 /* Don't let as_fatal remove the output file! */
1262 out_file_name
= NULL
;
1263 as_fatal (_("The input and output files must be distinct"));
1273 input_scrub_begin ();
1276 /* It has to be called after dump_statistics (). */
1277 xatexit (close_output_file
);
1279 if (flag_print_statistics
)
1280 xatexit (dump_statistics
);
1284 macro_strip_at
= flag_mri
;
1287 macro_init (flag_macro_alternate
, flag_mri
, macro_strip_at
, macro_expr
);
1291 output_file_create (out_file_name
);
1292 gas_assert (stdoutput
!= 0);
1296 #ifdef tc_init_after_args
1297 tc_init_after_args ();
1304 local_symbol_make (".gasversion.", absolute_section
,
1305 BFD_VERSION
/ 10000UL, &predefined_address_frag
);
1307 /* Now that we have fully initialized, and have created the output
1308 file, define any symbols requested by --defsym command line
1310 while (defsyms
!= NULL
)
1313 struct defsym_list
*next
;
1315 sym
= symbol_new (defsyms
->name
, absolute_section
, defsyms
->value
,
1316 &zero_address_frag
);
1317 /* Make symbols defined on the command line volatile, so that they
1318 can be redefined inside a source file. This makes this assembler's
1319 behaviour compatible with earlier versions, but it may not be
1320 completely intuitive. */
1321 S_SET_VOLATILE (sym
);
1322 symbol_table_insert (sym
);
1323 next
= defsyms
->next
;
1331 perform_an_assembly_pass (argc
, argv
);
1333 cond_finish_check (-1);
1339 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1340 if ((flag_execstack
|| flag_noexecstack
)
1341 && OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
1345 gnustack
= subseg_new (".note.GNU-stack", 0);
1346 bfd_set_section_flags (stdoutput
, gnustack
,
1347 SEC_READONLY
| (flag_execstack
? SEC_CODE
: 0));
1352 /* If we've been collecting dwarf2 .debug_line info, either for
1353 assembly debugging or on behalf of the compiler, emit it now. */
1356 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1357 directives from the user or by the backend, emit it now. */
1361 if (seen_at_least_1_file ())
1363 int n_warns
, n_errs
;
1367 write_object_file ();
1369 n_warns
= had_warnings ();
1370 n_errs
= had_errors ();
1373 ngettext ("%d warning", "%d warnings", n_warns
), n_warns
);
1375 ngettext ("%d error", "%d errors", n_errs
), n_errs
);
1376 if (flag_fatal_warnings
&& n_warns
!= 0)
1379 as_bad (_("%s, treating warnings as errors"), warn_msg
);
1385 else if (flag_always_generate_output
)
1387 /* The -Z flag indicates that an object file should be generated,
1388 regardless of warnings and errors. */
1390 fprintf (stderr
, _("%s, %s, generating bad object file\n"),
1398 listing_print (listing_filename
, argv_orig
);
1403 END_PROGRESS (myname
);
1405 /* Use xexit instead of return, because under VMS environments they
1406 may not place the same interpretation on the value given. */
1407 if (had_errors () != 0)
1408 xexit (EXIT_FAILURE
);
1410 /* Only generate dependency file if assembler was successful. */
1411 print_dependencies ();
1413 xexit (EXIT_SUCCESS
);