1 /* as.c - GAS main program.
2 Copyright (C) 1987-2020 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 /* Which version of DWARF CIE to produce. This default value of -1
99 indicates that this value has not been set yet, a default value is
100 provided in dwarf2_init. A different value can also be supplied by the
101 command line flag --gdwarf-cie-version, or by a target in
102 MD_AFTER_PARSE_ARGS. */
103 int flag_dwarf_cie_version
= -1;
105 /* The maximum level of DWARF DEBUG information we should manufacture. */
106 unsigned int dwarf_level
= 0;
108 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
109 int flag_use_elf_stt_common
= DEFAULT_GENERATE_ELF_STT_COMMON
;
110 bfd_boolean flag_generate_build_notes
= DEFAULT_GENERATE_BUILD_NOTES
;
113 /* Keep the output file. */
114 static int keep_it
= 0;
122 /* Name of listing file. */
123 static char *listing_filename
= NULL
;
125 static struct defsym_list
*defsyms
;
128 /* Keep a record of the itbl files we read in. */
129 struct itbl_file_list
131 struct itbl_file_list
*next
;
134 static struct itbl_file_list
*itbl_files
;
137 static long start_time
;
139 static int flag_macro_alternate
;
142 #ifdef USE_EMULATIONS
143 #define EMULATION_ENVIRON "AS_EMULATION"
145 extern struct emulation mipsbelf
, mipslelf
, mipself
;
146 extern struct emulation i386coff
, i386elf
, i386aout
;
147 extern struct emulation crisaout
, criself
;
149 static struct emulation
*const emulations
[] = { EMULATIONS
};
150 static const int n_emulations
= sizeof (emulations
) / sizeof (emulations
[0]);
153 select_emulation_mode (int argc
, char **argv
)
157 const char *em
= NULL
;
159 for (i
= 1; i
< argc
; i
++)
160 if (!strncmp ("--em", argv
[i
], 4))
166 p
= strchr (argv
[i
], '=');
173 as_fatal (_("missing emulation mode name"));
178 em
= getenv (EMULATION_ENVIRON
);
180 em
= DEFAULT_EMULATION
;
184 for (i
= 0; i
< n_emulations
; i
++)
185 if (!strcmp (emulations
[i
]->name
, em
))
187 if (i
== n_emulations
)
188 as_fatal (_("unrecognized emulation name `%s'"), em
);
189 this_emulation
= emulations
[i
];
192 this_emulation
= emulations
[0];
194 this_emulation
->init ();
198 default_emul_bfd_name (void)
205 common_emul_init (void)
207 this_format
= this_emulation
->format
;
209 if (this_emulation
->leading_underscore
== 2)
210 this_emulation
->leading_underscore
= this_format
->dfl_leading_underscore
;
212 if (this_emulation
->default_endian
!= 2)
213 target_big_endian
= this_emulation
->default_endian
;
215 if (this_emulation
->fake_label_name
== 0)
217 if (this_emulation
->leading_underscore
)
218 this_emulation
->fake_label_name
= FAKE_LABEL_NAME
;
220 /* What other parameters should we test? */
221 this_emulation
->fake_label_name
= "." FAKE_LABEL_NAME
;
227 print_version_id (void)
235 fprintf (stderr
, _("GNU assembler version %s (%s) using BFD version %s\n"),
236 VERSION
, TARGET_ALIAS
, BFD_VERSION_STRING
);
239 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
240 enum compressed_debug_section_type flag_compress_debug
241 = COMPRESS_DEBUG_GABI_ZLIB
;
245 show_usage (FILE * stream
)
247 fprintf (stream
, _("Usage: %s [option...] [asmfile...]\n"), myname
);
249 fprintf (stream
, _("\
251 -a[sub-option...] turn on listings\n\
252 Sub-options [default hls]:\n\
253 c omit false conditionals\n\
254 d omit debugging directives\n\
255 g include general info\n\
256 h include high-level source\n\
257 l include assembly\n\
258 m include macro expansions\n\
259 n omit forms processing\n\
261 =FILE list to FILE (must be last sub-option)\n"));
263 fprintf (stream
, _("\
264 --alternate initially turn on alternate macro syntax\n"));
265 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
266 fprintf (stream
, _("\
267 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
268 compress DWARF debug sections using zlib [default]\n"));
269 fprintf (stream
, _("\
270 --nocompress-debug-sections\n\
271 don't compress DWARF debug sections\n"));
273 fprintf (stream
, _("\
274 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
275 compress DWARF debug sections using zlib\n"));
276 fprintf (stream
, _("\
277 --nocompress-debug-sections\n\
278 don't compress DWARF debug sections [default]\n"));
280 fprintf (stream
, _("\
281 -D produce assembler debugging messages\n"));
282 fprintf (stream
, _("\
283 --debug-prefix-map OLD=NEW\n\
284 map OLD to NEW in debug information\n"));
285 fprintf (stream
, _("\
286 --defsym SYM=VAL define symbol SYM to given value\n"));
287 #ifdef USE_EMULATIONS
294 for (i
= 0; i
< n_emulations
- 1; i
++)
295 fprintf (stream
, "%s | ", emulations
[i
]->name
);
296 fprintf (stream
, "%s]\n", emulations
[i
]->name
);
298 def_em
= getenv (EMULATION_ENVIRON
);
300 def_em
= DEFAULT_EMULATION
;
301 fprintf (stream
, _("\
302 emulate output (default %s)\n"), def_em
);
305 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
306 fprintf (stream
, _("\
307 --execstack require executable stack for this object\n"));
308 fprintf (stream
, _("\
309 --noexecstack don't require executable stack for this object\n"));
310 fprintf (stream
, _("\
311 --size-check=[error|warning]\n\
312 ELF .size directive check (default --size-check=error)\n"));
313 fprintf (stream
, _("\
314 --elf-stt-common=[no|yes] "));
315 if (DEFAULT_GENERATE_ELF_STT_COMMON
)
316 fprintf (stream
, _("(default: yes)\n"));
318 fprintf (stream
, _("(default: no)\n"));
319 fprintf (stream
, _("\
320 generate ELF common symbols with STT_COMMON type\n"));
321 fprintf (stream
, _("\
322 --sectname-subst enable section name substitution sequences\n"));
324 fprintf (stream
, _("\
325 --generate-missing-build-notes=[no|yes] "));
326 #if DEFAULT_GENERATE_BUILD_NOTES
327 fprintf (stream
, _("(default: yes)\n"));
329 fprintf (stream
, _("(default: no)\n"));
331 fprintf (stream
, _("\
332 generate GNU Build notes if none are present in the input\n"));
335 fprintf (stream
, _("\
336 -f skip whitespace and comment preprocessing\n"));
337 fprintf (stream
, _("\
338 -g --gen-debug generate debugging information\n"));
339 fprintf (stream
, _("\
340 --gstabs generate STABS debugging information\n"));
341 fprintf (stream
, _("\
342 --gstabs+ generate STABS debug info with GNU extensions\n"));
343 fprintf (stream
, _("\
344 --gdwarf-<N> generate DWARF<N> debugging information. 2 <= <N> <= 5\n"));
345 fprintf (stream
, _("\
346 --gdwarf-sections generate per-function section names for DWARF line information\n"));
347 fprintf (stream
, _("\
348 --hash-size=<value> set the hash table size close to <value>\n"));
349 fprintf (stream
, _("\
350 --help show this message and exit\n"));
351 fprintf (stream
, _("\
352 --target-help show target specific options\n"));
353 fprintf (stream
, _("\
354 -I DIR add DIR to search list for .include directives\n"));
355 fprintf (stream
, _("\
356 -J don't warn about signed overflow\n"));
357 fprintf (stream
, _("\
358 -K warn when differences altered for long displacements\n"));
359 fprintf (stream
, _("\
360 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
361 fprintf (stream
, _("\
362 -M,--mri assemble in MRI compatibility mode\n"));
363 fprintf (stream
, _("\
364 --MD FILE write dependency information in FILE (default none)\n"));
365 fprintf (stream
, _("\
367 fprintf (stream
, _("\
368 -no-pad-sections do not pad the end of sections to alignment boundaries\n"));
369 fprintf (stream
, _("\
370 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
371 fprintf (stream
, _("\
372 -R fold data section into text section\n"));
373 fprintf (stream
, _("\
374 --reduce-memory-overheads \n\
375 prefer smaller memory use at the cost of longer\n\
377 fprintf (stream
, _("\
378 --statistics print various measured statistics from execution\n"));
379 fprintf (stream
, _("\
380 --strip-local-absolute strip local absolute symbols\n"));
381 fprintf (stream
, _("\
382 --traditional-format Use same format as native assembler when possible\n"));
383 fprintf (stream
, _("\
384 --version print assembler version number and exit\n"));
385 fprintf (stream
, _("\
386 -W --no-warn suppress warnings\n"));
387 fprintf (stream
, _("\
388 --warn don't suppress warnings\n"));
389 fprintf (stream
, _("\
390 --fatal-warnings treat warnings as errors\n"));
392 fprintf (stream
, _("\
393 --itbl INSTTBL extend instruction set to include instructions\n\
394 matching the specifications defined in file INSTTBL\n"));
396 fprintf (stream
, _("\
398 fprintf (stream
, _("\
400 fprintf (stream
, _("\
401 -Z generate object file even after errors\n"));
402 fprintf (stream
, _("\
403 --listing-lhs-width set the width in words of the output data column of\n\
405 fprintf (stream
, _("\
406 --listing-lhs-width2 set the width in words of the continuation lines\n\
407 of the output data column; ignored if smaller than\n\
408 the width of the first line\n"));
409 fprintf (stream
, _("\
410 --listing-rhs-width set the max width in characters of the lines from\n\
411 the source file\n"));
412 fprintf (stream
, _("\
413 --listing-cont-lines set the maximum number of continuation lines used\n\
414 for the output data column of the listing\n"));
415 fprintf (stream
, _("\
416 @FILE read options from FILE\n"));
418 md_show_usage (stream
);
420 fputc ('\n', stream
);
422 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
423 fprintf (stream
, _("Report bugs to %s\n"), REPORT_BUGS_TO
);
426 /* Since it is easy to do here we interpret the special arg "-"
427 to mean "use stdin" and we set that argv[] pointing to "".
428 After we have munged argv[], the only things left are source file
429 name(s) and ""(s) denoting stdin. These file names are used
430 (perhaps more than once) later.
432 check for new machine-dep cmdline options in
433 md_parse_option definitions in config/tc-*.c. */
436 parse_args (int * pargc
, char *** pargv
)
442 /* Starting the short option string with '-' is for programs that
443 expect options and other ARGV-elements in any order and that care about
444 the ordering of the two. We describe each non-option ARGV-element
445 as if it were the argument of an option with character code 1. */
447 extern const char *md_shortopts
;
448 static const char std_shortopts
[] =
451 #ifndef WORKING_DOT_WORD
452 /* -K is not meaningful if .word is not being hacked. */
455 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
457 /* -v takes an argument on VMS, so we don't make it a generic
463 /* New option for extending instruction set (see also --itbl below). */
468 struct option
*longopts
;
469 extern struct option md_longopts
[];
470 extern size_t md_longopts_size
;
471 /* Codes used for the long options with no short synonyms. */
474 OPTION_HELP
= OPTION_STD_BASE
,
481 OPTION_DEBUG_PREFIX_MAP
,
483 OPTION_LISTING_LHS_WIDTH
,
484 OPTION_LISTING_LHS_WIDTH2
,
485 OPTION_LISTING_RHS_WIDTH
,
486 OPTION_LISTING_CONT_LINES
,
494 OPTION_GDWARF_SECTIONS
,
495 OPTION_GDWARF_CIE_VERSION
,
496 OPTION_STRIP_LOCAL_ABSOLUTE
,
497 OPTION_TRADITIONAL_FORMAT
,
503 OPTION_ELF_STT_COMMON
,
504 OPTION_ELF_BUILD_NOTES
,
505 OPTION_SECTNAME_SUBST
,
508 OPTION_HASH_TABLE_SIZE
,
509 OPTION_REDUCE_MEMORY_OVERHEADS
,
511 OPTION_COMPRESS_DEBUG
,
512 OPTION_NOCOMPRESS_DEBUG
,
513 OPTION_NO_PAD_SECTIONS
/* = STD_BASE + 40 */
514 /* When you add options here, check that they do
515 not collide with OPTION_MD_BASE. See as.h. */
518 static const struct option std_longopts
[] =
520 /* Note: commas are placed at the start of the line rather than
521 the end of the preceding line so that it is simpler to
522 selectively add and remove lines from this list. */
523 {"alternate", no_argument
, NULL
, OPTION_ALTERNATE
}
524 /* The entry for "a" is here to prevent getopt_long_only() from
525 considering that -a is an abbreviation for --alternate. This is
526 necessary because -a=<FILE> is a valid switch but getopt would
527 normally reject it since --alternate does not take an argument. */
528 ,{"a", optional_argument
, NULL
, 'a'}
529 /* Handle -al=<FILE>. */
530 ,{"al", optional_argument
, NULL
, OPTION_AL
}
531 ,{"compress-debug-sections", optional_argument
, NULL
, OPTION_COMPRESS_DEBUG
}
532 ,{"nocompress-debug-sections", no_argument
, NULL
, OPTION_NOCOMPRESS_DEBUG
}
533 ,{"debug-prefix-map", required_argument
, NULL
, OPTION_DEBUG_PREFIX_MAP
}
534 ,{"defsym", required_argument
, NULL
, OPTION_DEFSYM
}
535 ,{"dump-config", no_argument
, NULL
, OPTION_DUMPCONFIG
}
536 ,{"emulation", required_argument
, NULL
, OPTION_EMULATION
}
537 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
538 ,{"execstack", no_argument
, NULL
, OPTION_EXECSTACK
}
539 ,{"noexecstack", no_argument
, NULL
, OPTION_NOEXECSTACK
}
540 ,{"size-check", required_argument
, NULL
, OPTION_SIZE_CHECK
}
541 ,{"elf-stt-common", required_argument
, NULL
, OPTION_ELF_STT_COMMON
}
542 ,{"sectname-subst", no_argument
, NULL
, OPTION_SECTNAME_SUBST
}
543 ,{"generate-missing-build-notes", required_argument
, NULL
, OPTION_ELF_BUILD_NOTES
}
545 ,{"fatal-warnings", no_argument
, NULL
, OPTION_WARN_FATAL
}
546 ,{"gdwarf-2", no_argument
, NULL
, OPTION_GDWARF_2
}
547 ,{"gdwarf-3", no_argument
, NULL
, OPTION_GDWARF_3
}
548 ,{"gdwarf-4", no_argument
, NULL
, OPTION_GDWARF_4
}
549 ,{"gdwarf-5", no_argument
, NULL
, OPTION_GDWARF_5
}
550 /* GCC uses --gdwarf-2 but GAS used to to use --gdwarf2,
551 so we keep it here for backwards compatibility. */
552 ,{"gdwarf2", no_argument
, NULL
, OPTION_GDWARF_2
}
553 ,{"gdwarf-sections", no_argument
, NULL
, OPTION_GDWARF_SECTIONS
}
554 ,{"gdwarf-cie-version", required_argument
, NULL
, OPTION_GDWARF_CIE_VERSION
}
555 ,{"gen-debug", no_argument
, NULL
, 'g'}
556 ,{"gstabs", no_argument
, NULL
, OPTION_GSTABS
}
557 ,{"gstabs+", no_argument
, NULL
, OPTION_GSTABS_PLUS
}
558 ,{"hash-size", required_argument
, NULL
, OPTION_HASH_TABLE_SIZE
}
559 ,{"help", no_argument
, NULL
, OPTION_HELP
}
561 /* New option for extending instruction set (see also -t above).
562 The "-t file" or "--itbl file" option extends the basic set of
563 valid instructions by reading "file", a text file containing a
564 list of instruction formats. The additional opcodes and their
565 formats are added to the built-in set of instructions, and
566 mnemonics for new registers may also be defined. */
567 ,{"itbl", required_argument
, NULL
, 't'}
569 /* getopt allows abbreviations, so we do this to stop it from
570 treating -k as an abbreviation for --keep-locals. Some
571 ports use -k to enable PIC assembly. */
572 ,{"keep-locals", no_argument
, NULL
, 'L'}
573 ,{"keep-locals", no_argument
, NULL
, 'L'}
574 ,{"listing-lhs-width", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH
}
575 ,{"listing-lhs-width2", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH2
}
576 ,{"listing-rhs-width", required_argument
, NULL
, OPTION_LISTING_RHS_WIDTH
}
577 ,{"listing-cont-lines", required_argument
, NULL
, OPTION_LISTING_CONT_LINES
}
578 ,{"MD", required_argument
, NULL
, OPTION_DEPFILE
}
579 ,{"mri", no_argument
, NULL
, 'M'}
580 ,{"nocpp", no_argument
, NULL
, OPTION_NOCPP
}
581 ,{"no-pad-sections", no_argument
, NULL
, OPTION_NO_PAD_SECTIONS
}
582 ,{"no-warn", no_argument
, NULL
, 'W'}
583 ,{"reduce-memory-overheads", no_argument
, NULL
, OPTION_REDUCE_MEMORY_OVERHEADS
}
584 ,{"statistics", no_argument
, NULL
, OPTION_STATISTICS
}
585 ,{"strip-local-absolute", no_argument
, NULL
, OPTION_STRIP_LOCAL_ABSOLUTE
}
586 ,{"version", no_argument
, NULL
, OPTION_VERSION
}
587 ,{"verbose", no_argument
, NULL
, OPTION_VERBOSE
}
588 ,{"target-help", no_argument
, NULL
, OPTION_TARGET_HELP
}
589 ,{"traditional-format", no_argument
, NULL
, OPTION_TRADITIONAL_FORMAT
}
590 ,{"warn", no_argument
, NULL
, OPTION_WARN
}
593 /* Construct the option lists from the standard list and the target
594 dependent list. Include space for an extra NULL option and
595 always NULL terminate. */
596 shortopts
= concat (std_shortopts
, md_shortopts
, (char *) NULL
);
597 longopts
= (struct option
*) xmalloc (sizeof (std_longopts
)
598 + md_longopts_size
+ sizeof (struct option
));
599 memcpy (longopts
, std_longopts
, sizeof (std_longopts
));
600 memcpy (((char *) longopts
) + sizeof (std_longopts
), md_longopts
, md_longopts_size
);
601 memset (((char *) longopts
) + sizeof (std_longopts
) + md_longopts_size
,
602 0, sizeof (struct option
));
604 /* Make a local copy of the old argv. */
608 /* Initialize a new argv that contains no options. */
609 new_argv
= XNEWVEC (char *, old_argc
+ 1);
610 new_argv
[0] = old_argv
[0];
612 new_argv
[new_argc
] = NULL
;
616 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
617 indicate a long option. */
619 int optc
= getopt_long_only (old_argc
, old_argv
, shortopts
, longopts
,
628 /* md_parse_option should return 1 if it recognizes optc,
630 if (md_parse_option (optc
, optarg
) != 0)
632 /* `-v' isn't included in the general short_opts list, so check for
633 it explicitly here before deciding we've gotten a bad argument. */
637 /* Telling getopt to treat -v's value as optional can result
638 in it picking up a following filename argument here. The
639 VMS code in md_parse_option can return 0 in that case,
640 but it has no way of pushing the filename argument back. */
641 if (optarg
&& *optarg
)
642 new_argv
[new_argc
++] = optarg
, new_argv
[new_argc
] = NULL
;
653 as_bad (_("unrecognized option -%c%s"), optc
, optarg
? optarg
: "");
659 case 1: /* File name. */
660 if (!strcmp (optarg
, "-"))
661 optarg
= (char *) "";
662 new_argv
[new_argc
++] = optarg
;
663 new_argv
[new_argc
] = NULL
;
666 case OPTION_TARGET_HELP
:
667 md_show_usage (stdout
);
677 case OPTION_NO_PAD_SECTIONS
:
678 do_not_pad_sections_to_alignment
= 1;
681 case OPTION_STATISTICS
:
682 flag_print_statistics
= 1;
685 case OPTION_STRIP_LOCAL_ABSOLUTE
:
686 flag_strip_local_absolute
= 1;
689 case OPTION_TRADITIONAL_FORMAT
:
690 flag_traditional_format
= 1;
694 /* This output is intended to follow the GNU standards document. */
695 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING
);
696 printf (_("Copyright (C) 2020 Free Software Foundation, Inc.\n"));
698 This program is free software; you may redistribute it under the terms of\n\
699 the GNU General Public License version 3 or later.\n\
700 This program has absolutely no warranty.\n"));
701 #ifdef TARGET_WITH_CPU
702 printf (_("This assembler was configured for a target of `%s' "
703 "and default,\ncpu type `%s'.\n"),
704 TARGET_ALIAS
, TARGET_WITH_CPU
);
706 printf (_("This assembler was configured for a target of `%s'.\n"),
711 case OPTION_EMULATION
:
712 #ifdef USE_EMULATIONS
713 if (strcmp (optarg
, this_emulation
->name
))
714 as_fatal (_("multiple emulation names specified"));
716 as_fatal (_("emulations not handled in this configuration"));
720 case OPTION_DUMPCONFIG
:
721 fprintf (stderr
, _("alias = %s\n"), TARGET_ALIAS
);
722 fprintf (stderr
, _("canonical = %s\n"), TARGET_CANONICAL
);
723 fprintf (stderr
, _("cpu-type = %s\n"), TARGET_CPU
);
724 #ifdef TARGET_OBJ_FORMAT
725 fprintf (stderr
, _("format = %s\n"), TARGET_OBJ_FORMAT
);
728 fprintf (stderr
, _("bfd-target = %s\n"), TARGET_FORMAT
);
732 case OPTION_COMPRESS_DEBUG
:
735 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
736 if (strcasecmp (optarg
, "none") == 0)
737 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
738 else if (strcasecmp (optarg
, "zlib") == 0)
739 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
740 else if (strcasecmp (optarg
, "zlib-gnu") == 0)
741 flag_compress_debug
= COMPRESS_DEBUG_GNU_ZLIB
;
742 else if (strcasecmp (optarg
, "zlib-gabi") == 0)
743 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
745 as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
748 as_fatal (_("--compress-debug-sections=%s is unsupported"),
753 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
756 case OPTION_NOCOMPRESS_DEBUG
:
757 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
760 case OPTION_DEBUG_PREFIX_MAP
:
761 add_debug_prefix_map (optarg
);
768 struct defsym_list
*n
;
770 for (s
= optarg
; *s
!= '\0' && *s
!= '='; s
++)
773 as_fatal (_("bad defsym; format is --defsym name=value"));
775 i
= bfd_scan_vma (s
, (const char **) NULL
, 0);
776 n
= XNEW (struct defsym_list
);
787 /* optarg is the name of the file containing the instruction
788 formats, opcodes, register names, etc. */
789 struct itbl_file_list
*n
;
793 as_warn (_("no file name following -t option"));
797 n
= XNEW (struct itbl_file_list
);
798 n
->next
= itbl_files
;
802 /* Parse the file and add the new instructions to our internal
803 table. If multiple instruction tables are specified, the
804 information from this table gets appended onto the existing
806 itbl_files
->name
= xstrdup (optarg
);
807 if (itbl_parse (itbl_files
->name
) != 0)
808 as_fatal (_("failed to read instruction table %s\n"),
815 start_dependencies (optarg
);
819 /* Some backends, eg Alpha and Mips, use the -g switch for their
820 own purposes. So we check here for an explicit -g and allow
821 the backend to decide if it wants to process it. */
822 if ( old_argv
[optind
- 1][1] == 'g'
823 && md_parse_option (optc
, optarg
))
826 if (md_debug_format_selector
)
827 debug_type
= md_debug_format_selector (& use_gnu_debug_info_extensions
);
830 debug_type
= DEBUG_DWARF2
;
834 debug_type
= DEBUG_STABS
;
837 case OPTION_GSTABS_PLUS
:
838 use_gnu_debug_info_extensions
= 1;
841 debug_type
= DEBUG_STABS
;
844 case OPTION_GDWARF_2
:
845 debug_type
= DEBUG_DWARF2
;
849 case OPTION_GDWARF_3
:
850 debug_type
= DEBUG_DWARF2
;
854 case OPTION_GDWARF_4
:
855 debug_type
= DEBUG_DWARF2
;
859 case OPTION_GDWARF_5
:
860 debug_type
= DEBUG_DWARF2
;
864 case OPTION_GDWARF_SECTIONS
:
865 flag_dwarf_sections
= TRUE
;
868 case OPTION_GDWARF_CIE_VERSION
:
869 flag_dwarf_cie_version
= atoi (optarg
);
870 /* The available CIE versions are 1 (DWARF 2), 3 (DWARF 3), and 4
872 if (flag_dwarf_cie_version
< 1
873 || flag_dwarf_cie_version
== 2
874 || flag_dwarf_cie_version
> 4)
875 as_fatal (_("Invalid --gdwarf-cie-version `%s'"), optarg
);
876 switch (flag_dwarf_cie_version
)
894 flag_signed_overflow_ok
= 1;
897 #ifndef WORKING_DOT_WORD
899 flag_warn_displacement
= 1;
903 flag_keep_locals
= 1;
906 case OPTION_LISTING_LHS_WIDTH
:
907 listing_lhs_width
= atoi (optarg
);
908 if (listing_lhs_width_second
< listing_lhs_width
)
909 listing_lhs_width_second
= listing_lhs_width
;
911 case OPTION_LISTING_LHS_WIDTH2
:
913 int tmp
= atoi (optarg
);
915 if (tmp
> listing_lhs_width
)
916 listing_lhs_width_second
= tmp
;
919 case OPTION_LISTING_RHS_WIDTH
:
920 listing_rhs_width
= atoi (optarg
);
922 case OPTION_LISTING_CONT_LINES
:
923 listing_lhs_cont_lines
= atoi (optarg
);
934 flag_readonly_data_in_text
= 1;
938 flag_no_warnings
= 1;
942 flag_no_warnings
= 0;
943 flag_fatal_warnings
= 0;
946 case OPTION_WARN_FATAL
:
947 flag_no_warnings
= 0;
948 flag_fatal_warnings
= 1;
951 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
952 case OPTION_EXECSTACK
:
954 flag_noexecstack
= 0;
957 case OPTION_NOEXECSTACK
:
958 flag_noexecstack
= 1;
962 case OPTION_SIZE_CHECK
:
963 if (strcasecmp (optarg
, "error") == 0)
964 flag_allow_nonconst_size
= FALSE
;
965 else if (strcasecmp (optarg
, "warning") == 0)
966 flag_allow_nonconst_size
= TRUE
;
968 as_fatal (_("Invalid --size-check= option: `%s'"), optarg
);
971 case OPTION_ELF_STT_COMMON
:
972 if (strcasecmp (optarg
, "no") == 0)
973 flag_use_elf_stt_common
= 0;
974 else if (strcasecmp (optarg
, "yes") == 0)
975 flag_use_elf_stt_common
= 1;
977 as_fatal (_("Invalid --elf-stt-common= option: `%s'"),
981 case OPTION_SECTNAME_SUBST
:
982 flag_sectname_subst
= 1;
985 case OPTION_ELF_BUILD_NOTES
:
986 if (strcasecmp (optarg
, "no") == 0)
987 flag_generate_build_notes
= FALSE
;
988 else if (strcasecmp (optarg
, "yes") == 0)
989 flag_generate_build_notes
= TRUE
;
991 as_fatal (_("Invalid --generate-missing-build-notes option: `%s'"),
998 flag_always_generate_output
= 1;
1002 listing
|= LISTING_LISTING
;
1004 listing_filename
= xstrdup (optarg
);
1007 case OPTION_ALTERNATE
:
1008 optarg
= old_argv
[optind
- 1];
1009 while (* optarg
== '-')
1012 if (strcmp (optarg
, "alternate") == 0)
1014 flag_macro_alternate
= 1;
1023 if (optarg
!= old_argv
[optind
] && optarg
[-1] == '=')
1026 if (md_parse_option (optc
, optarg
) != 0)
1034 listing
|= LISTING_NOCOND
;
1037 listing
|= LISTING_NODEBUG
;
1040 listing
|= LISTING_GENERAL
;
1043 listing
|= LISTING_HLL
;
1046 listing
|= LISTING_LISTING
;
1049 listing
|= LISTING_MACEXP
;
1052 listing
|= LISTING_NOFORM
;
1055 listing
|= LISTING_SYMBOLS
;
1058 listing_filename
= xstrdup (optarg
+ 1);
1059 optarg
+= strlen (listing_filename
);
1062 as_fatal (_("invalid listing option `%c'"), *optarg
);
1069 listing
= LISTING_DEFAULT
;
1073 /* DEBUG is implemented: it debugs different
1074 things from other people's assemblers. */
1079 flag_no_comments
= 1;
1083 { /* Include file directory. */
1084 char *temp
= xstrdup (optarg
);
1086 add_include_dir (temp
);
1091 out_file_name
= xstrdup (optarg
);
1098 /* -X means treat warnings as errors. */
1101 case OPTION_REDUCE_MEMORY_OVERHEADS
:
1102 /* The only change we make at the moment is to reduce
1103 the size of the hash tables that we use. */
1104 set_gas_hash_table_size (4051);
1107 case OPTION_HASH_TABLE_SIZE
:
1109 unsigned long new_size
;
1111 new_size
= strtoul (optarg
, NULL
, 0);
1113 set_gas_hash_table_size (new_size
);
1115 as_fatal (_("--hash-size needs a numeric argument"));
1127 #ifdef md_after_parse_args
1128 md_after_parse_args ();
1133 dump_statistics (void)
1135 long run_time
= get_run_time () - start_time
;
1137 fprintf (stderr
, _("%s: total time in assembly: %ld.%06ld\n"),
1138 myname
, run_time
/ 1000000, run_time
% 1000000);
1140 subsegs_print_statistics (stderr
);
1141 write_print_statistics (stderr
);
1142 symbol_print_statistics (stderr
);
1143 read_print_statistics (stderr
);
1145 #ifdef tc_print_statistics
1146 tc_print_statistics (stderr
);
1149 #ifdef obj_print_statistics
1150 obj_print_statistics (stderr
);
1155 close_output_file (void)
1157 output_file_close (out_file_name
);
1159 unlink_if_ordinary (out_file_name
);
1162 /* The interface between the macro code and gas expression handling. */
1165 macro_expr (const char *emsg
, size_t idx
, sb
*in
, offsetT
*val
)
1171 temp_ilp (in
->ptr
+ idx
);
1172 expression_and_evaluate (&ex
);
1173 idx
= input_line_pointer
- in
->ptr
;
1176 if (ex
.X_op
!= O_constant
)
1177 as_bad ("%s", emsg
);
1179 *val
= ex
.X_add_number
;
1184 /* Here to attempt 1 pass over each input file.
1185 We scan argv[*] looking for filenames or exactly "" which is
1186 shorthand for stdin. Any argv that is NULL is not a file-name.
1187 We set need_pass_2 TRUE if, after this, we still have unresolved
1188 expressions of the form (unknown value)+-(unknown value).
1190 Note the un*x semantics: there is only 1 logical input file, but it
1191 may be a catenation of many 'physical' input files. */
1194 perform_an_assembly_pass (int argc
, char ** argv
)
1198 flagword applicable
;
1204 /* Create the standard sections, and those the assembler uses
1206 text_section
= subseg_new (TEXT_SECTION_NAME
, 0);
1207 data_section
= subseg_new (DATA_SECTION_NAME
, 0);
1208 bss_section
= subseg_new (BSS_SECTION_NAME
, 0);
1209 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1210 to have relocs, otherwise we don't find out in time. */
1211 applicable
= bfd_applicable_section_flags (stdoutput
);
1212 bfd_set_section_flags (text_section
,
1213 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1214 | SEC_CODE
| SEC_READONLY
));
1215 bfd_set_section_flags (data_section
,
1216 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1218 bfd_set_section_flags (bss_section
, applicable
& SEC_ALLOC
);
1219 seg_info (bss_section
)->bss
= 1;
1221 subseg_new (BFD_ABS_SECTION_NAME
, 0);
1222 subseg_new (BFD_UND_SECTION_NAME
, 0);
1223 reg_section
= subseg_new ("*GAS `reg' section*", 0);
1224 expr_section
= subseg_new ("*GAS `expr' section*", 0);
1227 subseg_set (text_section
, 0);
1230 /* This may add symbol table entries, which requires having an open BFD,
1231 and sections already created. */
1248 { /* Is it a file-name argument? */
1251 /* argv->"" if stdin desired, else->filename. */
1252 read_a_source_file (*argv
);
1254 argv
++; /* Completed that argv. */
1257 read_a_source_file ("");
1262 main (int argc
, char ** argv
)
1264 char ** argv_orig
= argv
;
1269 start_time
= get_run_time ();
1272 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
1273 setlocale (LC_MESSAGES
, "");
1275 #if defined (HAVE_SETLOCALE)
1276 setlocale (LC_CTYPE
, "");
1278 bindtextdomain (PACKAGE
, LOCALEDIR
);
1279 textdomain (PACKAGE
);
1284 #ifdef HOST_SPECIAL_INIT
1285 HOST_SPECIAL_INIT (argc
, argv
);
1289 xmalloc_set_program_name (myname
);
1291 expandargv (&argc
, &argv
);
1293 START_PROGRESS (myname
, 0);
1295 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1296 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1299 out_file_name
= OBJ_DEFAULT_OUTPUT_FILE_NAME
;
1302 if (bfd_init () != BFD_INIT_MAGIC
)
1303 as_fatal (_("libbfd ABI mismatch"));
1304 bfd_set_error_program_name (myname
);
1306 #ifdef USE_EMULATIONS
1307 select_emulation_mode (argc
, argv
);
1311 /* Call parse_args before any of the init/begin functions
1312 so that switches like --hash-size can be honored. */
1313 parse_args (&argc
, &argv
);
1315 if (argc
> 1 && stat (out_file_name
, &sob
) == 0)
1319 for (i
= 1; i
< argc
; ++i
)
1323 /* Check that the input file and output file are different. */
1324 if (stat (argv
[i
], &sib
) == 0
1325 && sib
.st_ino
== sob
.st_ino
1326 /* POSIX emulating systems may support stat() but if the
1327 underlying file system does not support a file serial number
1328 of some kind then they will return 0 for the inode. So
1329 two files with an inode of 0 may not actually be the same.
1330 On real POSIX systems no ordinary file will ever have an
1333 /* Different files may have the same inode number if they
1334 reside on different devices, so check the st_dev field as
1336 && sib
.st_dev
== sob
.st_dev
1337 /* PR 25572: Only check regular files. Devices, sockets and so
1338 on might actually work as both input and output. Plus there
1339 is a use case for using /dev/null as both input and output
1340 when checking for command line option support in a script:
1341 as --foo /dev/null -o /dev/null; if $? then ... */
1342 && S_ISREG (sib
.st_mode
))
1344 const char *saved_out_file_name
= out_file_name
;
1346 /* Don't let as_fatal remove the output file! */
1347 out_file_name
= NULL
;
1348 as_fatal (_("The input '%s' and output '%s' files are the same"),
1349 argv
[i
], saved_out_file_name
);
1358 input_scrub_begin ();
1361 /* It has to be called after dump_statistics (). */
1362 xatexit (close_output_file
);
1364 if (flag_print_statistics
)
1365 xatexit (dump_statistics
);
1369 macro_strip_at
= flag_mri
;
1372 macro_init (flag_macro_alternate
, flag_mri
, macro_strip_at
, macro_expr
);
1376 output_file_create (out_file_name
);
1377 gas_assert (stdoutput
!= 0);
1381 #ifdef tc_init_after_args
1382 tc_init_after_args ();
1389 local_symbol_make (".gasversion.", absolute_section
,
1390 BFD_VERSION
/ 10000UL, &predefined_address_frag
);
1392 /* Now that we have fully initialized, and have created the output
1393 file, define any symbols requested by --defsym command line
1395 while (defsyms
!= NULL
)
1398 struct defsym_list
*next
;
1400 sym
= symbol_new (defsyms
->name
, absolute_section
, defsyms
->value
,
1401 &zero_address_frag
);
1402 /* Make symbols defined on the command line volatile, so that they
1403 can be redefined inside a source file. This makes this assembler's
1404 behaviour compatible with earlier versions, but it may not be
1405 completely intuitive. */
1406 S_SET_VOLATILE (sym
);
1407 symbol_table_insert (sym
);
1408 next
= defsyms
->next
;
1416 perform_an_assembly_pass (argc
, argv
);
1418 cond_finish_check (-1);
1424 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1425 if ((flag_execstack
|| flag_noexecstack
)
1426 && OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
1430 gnustack
= subseg_new (".note.GNU-stack", 0);
1431 bfd_set_section_flags (gnustack
,
1432 SEC_READONLY
| (flag_execstack
? SEC_CODE
: 0));
1437 /* If we've been collecting dwarf2 .debug_line info, either for
1438 assembly debugging or on behalf of the compiler, emit it now. */
1441 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1442 directives from the user or by the backend, emit it now. */
1446 if (seen_at_least_1_file ())
1448 int n_warns
, n_errs
;
1452 write_object_file ();
1454 n_warns
= had_warnings ();
1455 n_errs
= had_errors ();
1458 ngettext ("%d warning", "%d warnings", n_warns
), n_warns
);
1460 ngettext ("%d error", "%d errors", n_errs
), n_errs
);
1461 if (flag_fatal_warnings
&& n_warns
!= 0)
1464 as_bad (_("%s, treating warnings as errors"), warn_msg
);
1470 else if (flag_always_generate_output
)
1472 /* The -Z flag indicates that an object file should be generated,
1473 regardless of warnings and errors. */
1475 fprintf (stderr
, _("%s, %s, generating bad object file\n"),
1483 listing_print (listing_filename
, argv_orig
);
1488 END_PROGRESS (myname
);
1490 /* Use xexit instead of return, because under VMS environments they
1491 may not place the same interpretation on the value given. */
1492 if (had_errors () != 0)
1493 xexit (EXIT_FAILURE
);
1495 /* Only generate dependency file if assembler was successful. */
1496 print_dependencies ();
1498 xexit (EXIT_SUCCESS
);