1 /* as.c - GAS main program.
2 Copyright (C) 1987-2021 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 This defaults to 3 unless overridden by a command line option. */
107 unsigned int dwarf_level
= 3;
109 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
110 int flag_use_elf_stt_common
= DEFAULT_GENERATE_ELF_STT_COMMON
;
111 bool flag_generate_build_notes
= DEFAULT_GENERATE_BUILD_NOTES
;
114 /* Keep the output file. */
115 static int keep_it
= 0;
123 /* Name of listing file. */
124 static char *listing_filename
= NULL
;
126 static struct defsym_list
*defsyms
;
129 /* Keep a record of the itbl files we read in. */
130 struct itbl_file_list
132 struct itbl_file_list
*next
;
135 static struct itbl_file_list
*itbl_files
;
138 static long start_time
;
140 static int flag_macro_alternate
;
143 #ifdef USE_EMULATIONS
144 #define EMULATION_ENVIRON "AS_EMULATION"
146 extern struct emulation mipsbelf
, mipslelf
, mipself
;
147 extern struct emulation i386coff
, i386elf
, i386aout
;
148 extern struct emulation crisaout
, criself
;
150 static struct emulation
*const emulations
[] = { EMULATIONS
};
151 static const int n_emulations
= sizeof (emulations
) / sizeof (emulations
[0]);
154 select_emulation_mode (int argc
, char **argv
)
158 const char *em
= NULL
;
160 for (i
= 1; i
< argc
; i
++)
161 if (startswith (argv
[i
], "--em"))
167 p
= strchr (argv
[i
], '=');
174 as_fatal (_("missing emulation mode name"));
179 em
= getenv (EMULATION_ENVIRON
);
181 em
= DEFAULT_EMULATION
;
185 for (i
= 0; i
< n_emulations
; i
++)
186 if (!strcmp (emulations
[i
]->name
, em
))
188 if (i
== n_emulations
)
189 as_fatal (_("unrecognized emulation name `%s'"), em
);
190 this_emulation
= emulations
[i
];
193 this_emulation
= emulations
[0];
195 this_emulation
->init ();
199 default_emul_bfd_name (void)
206 common_emul_init (void)
208 this_format
= this_emulation
->format
;
210 if (this_emulation
->leading_underscore
== 2)
211 this_emulation
->leading_underscore
= this_format
->dfl_leading_underscore
;
213 if (this_emulation
->default_endian
!= 2)
214 target_big_endian
= this_emulation
->default_endian
;
216 if (this_emulation
->fake_label_name
== 0)
218 if (this_emulation
->leading_underscore
)
219 this_emulation
->fake_label_name
= FAKE_LABEL_NAME
;
221 /* What other parameters should we test? */
222 this_emulation
->fake_label_name
= "." FAKE_LABEL_NAME
;
228 print_version_id (void)
236 fprintf (stderr
, _("GNU assembler version %s (%s) using BFD version %s\n"),
237 VERSION
, TARGET_ALIAS
, BFD_VERSION_STRING
);
240 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
241 enum compressed_debug_section_type flag_compress_debug
242 = COMPRESS_DEBUG_GABI_ZLIB
;
246 show_usage (FILE * stream
)
248 fprintf (stream
, _("Usage: %s [option...] [asmfile...]\n"), myname
);
250 fprintf (stream
, _("\
252 -a[sub-option...] turn on listings\n\
253 Sub-options [default hls]:\n\
254 c omit false conditionals\n\
255 d omit debugging directives\n\
256 g include general info\n\
257 h include high-level source\n\
258 l include assembly\n\
259 m include macro expansions\n\
260 n omit forms processing\n\
262 =FILE list to FILE (must be last sub-option)\n"));
264 fprintf (stream
, _("\
265 --alternate initially turn on alternate macro syntax\n"));
266 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
267 fprintf (stream
, _("\
268 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
269 compress DWARF debug sections using zlib [default]\n"));
270 fprintf (stream
, _("\
271 --nocompress-debug-sections\n\
272 don't compress DWARF debug sections\n"));
274 fprintf (stream
, _("\
275 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
276 compress DWARF debug sections using zlib\n"));
277 fprintf (stream
, _("\
278 --nocompress-debug-sections\n\
279 don't compress DWARF debug sections [default]\n"));
281 fprintf (stream
, _("\
282 -D produce assembler debugging messages\n"));
283 fprintf (stream
, _("\
284 --debug-prefix-map OLD=NEW\n\
285 map OLD to NEW in debug information\n"));
286 fprintf (stream
, _("\
287 --defsym SYM=VAL define symbol SYM to given value\n"));
288 #ifdef USE_EMULATIONS
295 for (i
= 0; i
< n_emulations
- 1; i
++)
296 fprintf (stream
, "%s | ", emulations
[i
]->name
);
297 fprintf (stream
, "%s]\n", emulations
[i
]->name
);
299 def_em
= getenv (EMULATION_ENVIRON
);
301 def_em
= DEFAULT_EMULATION
;
302 fprintf (stream
, _("\
303 emulate output (default %s)\n"), def_em
);
306 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
307 fprintf (stream
, _("\
308 --execstack require executable stack for this object\n"));
309 fprintf (stream
, _("\
310 --noexecstack don't require executable stack for this object\n"));
311 fprintf (stream
, _("\
312 --size-check=[error|warning]\n\
313 ELF .size directive check (default --size-check=error)\n"));
314 fprintf (stream
, _("\
315 --elf-stt-common=[no|yes] "));
316 if (DEFAULT_GENERATE_ELF_STT_COMMON
)
317 fprintf (stream
, _("(default: yes)\n"));
319 fprintf (stream
, _("(default: no)\n"));
320 fprintf (stream
, _("\
321 generate ELF common symbols with STT_COMMON type\n"));
322 fprintf (stream
, _("\
323 --sectname-subst enable section name substitution sequences\n"));
325 fprintf (stream
, _("\
326 --generate-missing-build-notes=[no|yes] "));
327 #if DEFAULT_GENERATE_BUILD_NOTES
328 fprintf (stream
, _("(default: yes)\n"));
330 fprintf (stream
, _("(default: no)\n"));
332 fprintf (stream
, _("\
333 generate GNU Build notes if none are present in the input\n"));
336 fprintf (stream
, _("\
337 -f skip whitespace and comment preprocessing\n"));
338 fprintf (stream
, _("\
339 -g --gen-debug generate debugging information\n"));
340 fprintf (stream
, _("\
341 --gstabs generate STABS debugging information\n"));
342 fprintf (stream
, _("\
343 --gstabs+ generate STABS debug info with GNU extensions\n"));
344 fprintf (stream
, _("\
345 --gdwarf-<N> generate DWARF<N> debugging information. 2 <= <N> <= 5\n"));
346 fprintf (stream
, _("\
347 --gdwarf-sections generate per-function section names for DWARF line information\n"));
348 fprintf (stream
, _("\
349 --target-help show target specific options\n"));
350 fprintf (stream
, _("\
351 -I DIR add DIR to search list for .include directives\n"));
352 fprintf (stream
, _("\
353 -J don't warn about signed overflow\n"));
354 fprintf (stream
, _("\
355 -K warn when differences altered for long displacements\n"));
356 fprintf (stream
, _("\
357 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
358 fprintf (stream
, _("\
359 -M,--mri assemble in MRI compatibility mode\n"));
360 fprintf (stream
, _("\
361 --MD FILE write dependency information in FILE (default none)\n"));
362 fprintf (stream
, _("\
364 fprintf (stream
, _("\
365 -no-pad-sections do not pad the end of sections to alignment boundaries\n"));
366 fprintf (stream
, _("\
367 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
368 fprintf (stream
, _("\
369 -R fold data section into text section\n"));
370 fprintf (stream
, _("\
371 --statistics print various measured statistics from execution\n"));
372 fprintf (stream
, _("\
373 --strip-local-absolute strip local absolute symbols\n"));
374 fprintf (stream
, _("\
375 --traditional-format Use same format as native assembler when possible\n"));
376 fprintf (stream
, _("\
377 --version print assembler version number and exit\n"));
378 fprintf (stream
, _("\
379 -W --no-warn suppress warnings\n"));
380 fprintf (stream
, _("\
381 --warn don't suppress warnings\n"));
382 fprintf (stream
, _("\
383 --fatal-warnings treat warnings as errors\n"));
385 fprintf (stream
, _("\
386 --itbl INSTTBL extend instruction set to include instructions\n\
387 matching the specifications defined in file INSTTBL\n"));
389 fprintf (stream
, _("\
391 fprintf (stream
, _("\
393 fprintf (stream
, _("\
394 -Z generate object file even after errors\n"));
395 fprintf (stream
, _("\
396 --listing-lhs-width set the width in words of the output data column of\n\
398 fprintf (stream
, _("\
399 --listing-lhs-width2 set the width in words of the continuation lines\n\
400 of the output data column; ignored if smaller than\n\
401 the width of the first line\n"));
402 fprintf (stream
, _("\
403 --listing-rhs-width set the max width in characters of the lines from\n\
404 the source file\n"));
405 fprintf (stream
, _("\
406 --listing-cont-lines set the maximum number of continuation lines used\n\
407 for the output data column of the listing\n"));
408 fprintf (stream
, _("\
409 @FILE read options from FILE\n"));
411 md_show_usage (stream
);
413 fputc ('\n', stream
);
415 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
416 fprintf (stream
, _("Report bugs to %s\n"), REPORT_BUGS_TO
);
419 /* Since it is easy to do here we interpret the special arg "-"
420 to mean "use stdin" and we set that argv[] pointing to "".
421 After we have munged argv[], the only things left are source file
422 name(s) and ""(s) denoting stdin. These file names are used
423 (perhaps more than once) later.
425 check for new machine-dep cmdline options in
426 md_parse_option definitions in config/tc-*.c. */
429 parse_args (int * pargc
, char *** pargv
)
435 /* Starting the short option string with '-' is for programs that
436 expect options and other ARGV-elements in any order and that care about
437 the ordering of the two. We describe each non-option ARGV-element
438 as if it were the argument of an option with character code 1. */
440 extern const char *md_shortopts
;
441 static const char std_shortopts
[] =
444 #ifndef WORKING_DOT_WORD
445 /* -K is not meaningful if .word is not being hacked. */
448 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
450 /* -v takes an argument on VMS, so we don't make it a generic
456 /* New option for extending instruction set (see also --itbl below). */
461 struct option
*longopts
;
462 extern struct option md_longopts
[];
463 extern size_t md_longopts_size
;
464 /* Codes used for the long options with no short synonyms. */
467 OPTION_HELP
= OPTION_STD_BASE
,
474 OPTION_DEBUG_PREFIX_MAP
,
476 OPTION_LISTING_LHS_WIDTH
,
477 OPTION_LISTING_LHS_WIDTH2
,
478 OPTION_LISTING_RHS_WIDTH
,
479 OPTION_LISTING_CONT_LINES
,
487 OPTION_GDWARF_SECTIONS
,
488 OPTION_GDWARF_CIE_VERSION
,
489 OPTION_STRIP_LOCAL_ABSOLUTE
,
490 OPTION_TRADITIONAL_FORMAT
,
496 OPTION_ELF_STT_COMMON
,
497 OPTION_ELF_BUILD_NOTES
,
498 OPTION_SECTNAME_SUBST
,
501 OPTION_HASH_TABLE_SIZE
,
502 OPTION_REDUCE_MEMORY_OVERHEADS
,
504 OPTION_COMPRESS_DEBUG
,
505 OPTION_NOCOMPRESS_DEBUG
,
506 OPTION_NO_PAD_SECTIONS
/* = STD_BASE + 40 */
507 /* When you add options here, check that they do
508 not collide with OPTION_MD_BASE. See as.h. */
511 static const struct option std_longopts
[] =
513 /* Note: commas are placed at the start of the line rather than
514 the end of the preceding line so that it is simpler to
515 selectively add and remove lines from this list. */
516 {"alternate", no_argument
, NULL
, OPTION_ALTERNATE
}
517 /* The entry for "a" is here to prevent getopt_long_only() from
518 considering that -a is an abbreviation for --alternate. This is
519 necessary because -a=<FILE> is a valid switch but getopt would
520 normally reject it since --alternate does not take an argument. */
521 ,{"a", optional_argument
, NULL
, 'a'}
522 /* Handle -al=<FILE>. */
523 ,{"al", optional_argument
, NULL
, OPTION_AL
}
524 ,{"compress-debug-sections", optional_argument
, NULL
, OPTION_COMPRESS_DEBUG
}
525 ,{"nocompress-debug-sections", no_argument
, NULL
, OPTION_NOCOMPRESS_DEBUG
}
526 ,{"debug-prefix-map", required_argument
, NULL
, OPTION_DEBUG_PREFIX_MAP
}
527 ,{"defsym", required_argument
, NULL
, OPTION_DEFSYM
}
528 ,{"dump-config", no_argument
, NULL
, OPTION_DUMPCONFIG
}
529 ,{"emulation", required_argument
, NULL
, OPTION_EMULATION
}
530 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
531 ,{"execstack", no_argument
, NULL
, OPTION_EXECSTACK
}
532 ,{"noexecstack", no_argument
, NULL
, OPTION_NOEXECSTACK
}
533 ,{"size-check", required_argument
, NULL
, OPTION_SIZE_CHECK
}
534 ,{"elf-stt-common", required_argument
, NULL
, OPTION_ELF_STT_COMMON
}
535 ,{"sectname-subst", no_argument
, NULL
, OPTION_SECTNAME_SUBST
}
536 ,{"generate-missing-build-notes", required_argument
, NULL
, OPTION_ELF_BUILD_NOTES
}
538 ,{"fatal-warnings", no_argument
, NULL
, OPTION_WARN_FATAL
}
539 ,{"gdwarf-2", no_argument
, NULL
, OPTION_GDWARF_2
}
540 ,{"gdwarf-3", no_argument
, NULL
, OPTION_GDWARF_3
}
541 ,{"gdwarf-4", no_argument
, NULL
, OPTION_GDWARF_4
}
542 ,{"gdwarf-5", no_argument
, NULL
, OPTION_GDWARF_5
}
543 /* GCC uses --gdwarf-2 but GAS used to to use --gdwarf2,
544 so we keep it here for backwards compatibility. */
545 ,{"gdwarf2", no_argument
, NULL
, OPTION_GDWARF_2
}
546 ,{"gdwarf-sections", no_argument
, NULL
, OPTION_GDWARF_SECTIONS
}
547 ,{"gdwarf-cie-version", required_argument
, NULL
, OPTION_GDWARF_CIE_VERSION
}
548 ,{"gen-debug", no_argument
, NULL
, 'g'}
549 ,{"gstabs", no_argument
, NULL
, OPTION_GSTABS
}
550 ,{"gstabs+", no_argument
, NULL
, OPTION_GSTABS_PLUS
}
551 ,{"hash-size", required_argument
, NULL
, OPTION_HASH_TABLE_SIZE
}
552 ,{"help", no_argument
, NULL
, OPTION_HELP
}
554 /* New option for extending instruction set (see also -t above).
555 The "-t file" or "--itbl file" option extends the basic set of
556 valid instructions by reading "file", a text file containing a
557 list of instruction formats. The additional opcodes and their
558 formats are added to the built-in set of instructions, and
559 mnemonics for new registers may also be defined. */
560 ,{"itbl", required_argument
, NULL
, 't'}
562 /* getopt allows abbreviations, so we do this to stop it from
563 treating -k as an abbreviation for --keep-locals. Some
564 ports use -k to enable PIC assembly. */
565 ,{"keep-locals", no_argument
, NULL
, 'L'}
566 ,{"keep-locals", no_argument
, NULL
, 'L'}
567 ,{"listing-lhs-width", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH
}
568 ,{"listing-lhs-width2", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH2
}
569 ,{"listing-rhs-width", required_argument
, NULL
, OPTION_LISTING_RHS_WIDTH
}
570 ,{"listing-cont-lines", required_argument
, NULL
, OPTION_LISTING_CONT_LINES
}
571 ,{"MD", required_argument
, NULL
, OPTION_DEPFILE
}
572 ,{"mri", no_argument
, NULL
, 'M'}
573 ,{"nocpp", no_argument
, NULL
, OPTION_NOCPP
}
574 ,{"no-pad-sections", no_argument
, NULL
, OPTION_NO_PAD_SECTIONS
}
575 ,{"no-warn", no_argument
, NULL
, 'W'}
576 ,{"reduce-memory-overheads", no_argument
, NULL
, OPTION_REDUCE_MEMORY_OVERHEADS
}
577 ,{"statistics", no_argument
, NULL
, OPTION_STATISTICS
}
578 ,{"strip-local-absolute", no_argument
, NULL
, OPTION_STRIP_LOCAL_ABSOLUTE
}
579 ,{"version", no_argument
, NULL
, OPTION_VERSION
}
580 ,{"verbose", no_argument
, NULL
, OPTION_VERBOSE
}
581 ,{"target-help", no_argument
, NULL
, OPTION_TARGET_HELP
}
582 ,{"traditional-format", no_argument
, NULL
, OPTION_TRADITIONAL_FORMAT
}
583 ,{"warn", no_argument
, NULL
, OPTION_WARN
}
586 /* Construct the option lists from the standard list and the target
587 dependent list. Include space for an extra NULL option and
588 always NULL terminate. */
589 shortopts
= concat (std_shortopts
, md_shortopts
, (char *) NULL
);
590 longopts
= (struct option
*) xmalloc (sizeof (std_longopts
)
591 + md_longopts_size
+ sizeof (struct option
));
592 memcpy (longopts
, std_longopts
, sizeof (std_longopts
));
593 memcpy (((char *) longopts
) + sizeof (std_longopts
), md_longopts
, md_longopts_size
);
594 memset (((char *) longopts
) + sizeof (std_longopts
) + md_longopts_size
,
595 0, sizeof (struct option
));
597 /* Make a local copy of the old argv. */
601 /* Initialize a new argv that contains no options. */
602 new_argv
= XNEWVEC (char *, old_argc
+ 1);
603 new_argv
[0] = old_argv
[0];
605 new_argv
[new_argc
] = NULL
;
609 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
610 indicate a long option. */
612 int optc
= getopt_long_only (old_argc
, old_argv
, shortopts
, longopts
,
621 /* md_parse_option should return 1 if it recognizes optc,
623 if (md_parse_option (optc
, optarg
) != 0)
625 /* `-v' isn't included in the general short_opts list, so check for
626 it explicitly here before deciding we've gotten a bad argument. */
630 /* Telling getopt to treat -v's value as optional can result
631 in it picking up a following filename argument here. The
632 VMS code in md_parse_option can return 0 in that case,
633 but it has no way of pushing the filename argument back. */
634 if (optarg
&& *optarg
)
635 new_argv
[new_argc
++] = optarg
, new_argv
[new_argc
] = NULL
;
646 as_bad (_("unrecognized option -%c%s"), optc
, optarg
? optarg
: "");
652 case 1: /* File name. */
653 if (!strcmp (optarg
, "-"))
654 optarg
= (char *) "";
655 new_argv
[new_argc
++] = optarg
;
656 new_argv
[new_argc
] = NULL
;
659 case OPTION_TARGET_HELP
:
660 md_show_usage (stdout
);
670 case OPTION_NO_PAD_SECTIONS
:
671 do_not_pad_sections_to_alignment
= 1;
674 case OPTION_STATISTICS
:
675 flag_print_statistics
= 1;
678 case OPTION_STRIP_LOCAL_ABSOLUTE
:
679 flag_strip_local_absolute
= 1;
682 case OPTION_TRADITIONAL_FORMAT
:
683 flag_traditional_format
= 1;
687 /* This output is intended to follow the GNU standards document. */
688 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING
);
689 printf (_("Copyright (C) 2021 Free Software Foundation, Inc.\n"));
691 This program is free software; you may redistribute it under the terms of\n\
692 the GNU General Public License version 3 or later.\n\
693 This program has absolutely no warranty.\n"));
694 #ifdef TARGET_WITH_CPU
695 printf (_("This assembler was configured for a target of `%s' "
696 "and default,\ncpu type `%s'.\n"),
697 TARGET_ALIAS
, TARGET_WITH_CPU
);
699 printf (_("This assembler was configured for a target of `%s'.\n"),
704 case OPTION_EMULATION
:
705 #ifdef USE_EMULATIONS
706 if (strcmp (optarg
, this_emulation
->name
))
707 as_fatal (_("multiple emulation names specified"));
709 as_fatal (_("emulations not handled in this configuration"));
713 case OPTION_DUMPCONFIG
:
714 fprintf (stderr
, _("alias = %s\n"), TARGET_ALIAS
);
715 fprintf (stderr
, _("canonical = %s\n"), TARGET_CANONICAL
);
716 fprintf (stderr
, _("cpu-type = %s\n"), TARGET_CPU
);
717 #ifdef TARGET_OBJ_FORMAT
718 fprintf (stderr
, _("format = %s\n"), TARGET_OBJ_FORMAT
);
721 fprintf (stderr
, _("bfd-target = %s\n"), TARGET_FORMAT
);
725 case OPTION_COMPRESS_DEBUG
:
728 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
729 if (strcasecmp (optarg
, "none") == 0)
730 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
731 else if (strcasecmp (optarg
, "zlib") == 0)
732 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
733 else if (strcasecmp (optarg
, "zlib-gnu") == 0)
734 flag_compress_debug
= COMPRESS_DEBUG_GNU_ZLIB
;
735 else if (strcasecmp (optarg
, "zlib-gabi") == 0)
736 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
738 as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
741 as_fatal (_("--compress-debug-sections=%s is unsupported"),
746 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
749 case OPTION_NOCOMPRESS_DEBUG
:
750 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
753 case OPTION_DEBUG_PREFIX_MAP
:
754 add_debug_prefix_map (optarg
);
761 struct defsym_list
*n
;
763 for (s
= optarg
; *s
!= '\0' && *s
!= '='; s
++)
766 as_fatal (_("bad defsym; format is --defsym name=value"));
768 i
= bfd_scan_vma (s
, (const char **) NULL
, 0);
769 n
= XNEW (struct defsym_list
);
780 /* optarg is the name of the file containing the instruction
781 formats, opcodes, register names, etc. */
782 struct itbl_file_list
*n
;
786 as_warn (_("no file name following -t option"));
790 n
= XNEW (struct itbl_file_list
);
791 n
->next
= itbl_files
;
795 /* Parse the file and add the new instructions to our internal
796 table. If multiple instruction tables are specified, the
797 information from this table gets appended onto the existing
799 itbl_files
->name
= xstrdup (optarg
);
800 if (itbl_parse (itbl_files
->name
) != 0)
801 as_fatal (_("failed to read instruction table %s\n"),
808 start_dependencies (optarg
);
812 /* Some backends, eg Alpha and Mips, use the -g switch for their
813 own purposes. So we check here for an explicit -g and allow
814 the backend to decide if it wants to process it. */
815 if ( old_argv
[optind
- 1][1] == 'g'
816 && md_parse_option (optc
, optarg
))
819 /* We end up here for any -gsomething-not-already-a-long-option.
820 give some useful feedback on not (yet) supported -gdwarfxxx
821 versions/sections/options. */
822 if (startswith (old_argv
[optind
- 1], "-gdwarf"))
823 as_fatal (_("unknown DWARF option %s\n"), old_argv
[optind
- 1]);
825 if (md_debug_format_selector
)
826 debug_type
= md_debug_format_selector (& use_gnu_debug_info_extensions
);
829 debug_type
= DEBUG_DWARF2
;
833 debug_type
= DEBUG_STABS
;
836 case OPTION_GSTABS_PLUS
:
837 use_gnu_debug_info_extensions
= 1;
840 debug_type
= DEBUG_STABS
;
843 case OPTION_GDWARF_2
:
844 debug_type
= DEBUG_DWARF2
;
848 case OPTION_GDWARF_3
:
849 debug_type
= DEBUG_DWARF2
;
853 case OPTION_GDWARF_4
:
854 debug_type
= DEBUG_DWARF2
;
858 case OPTION_GDWARF_5
:
859 debug_type
= DEBUG_DWARF2
;
863 case OPTION_GDWARF_SECTIONS
:
864 flag_dwarf_sections
= true;
867 case OPTION_GDWARF_CIE_VERSION
:
868 flag_dwarf_cie_version
= atoi (optarg
);
869 /* The available CIE versions are 1 (DWARF 2), 3 (DWARF 3), and 4
871 if (flag_dwarf_cie_version
< 1
872 || flag_dwarf_cie_version
== 2
873 || flag_dwarf_cie_version
> 4)
874 as_fatal (_("Invalid --gdwarf-cie-version `%s'"), optarg
);
875 switch (flag_dwarf_cie_version
)
893 flag_signed_overflow_ok
= 1;
896 #ifndef WORKING_DOT_WORD
898 flag_warn_displacement
= 1;
902 flag_keep_locals
= 1;
905 case OPTION_LISTING_LHS_WIDTH
:
906 listing_lhs_width
= atoi (optarg
);
907 if (listing_lhs_width_second
< listing_lhs_width
)
908 listing_lhs_width_second
= listing_lhs_width
;
910 case OPTION_LISTING_LHS_WIDTH2
:
912 int tmp
= atoi (optarg
);
914 if (tmp
> listing_lhs_width
)
915 listing_lhs_width_second
= tmp
;
918 case OPTION_LISTING_RHS_WIDTH
:
919 listing_rhs_width
= atoi (optarg
);
921 case OPTION_LISTING_CONT_LINES
:
922 listing_lhs_cont_lines
= atoi (optarg
);
933 flag_readonly_data_in_text
= 1;
937 flag_no_warnings
= 1;
941 flag_no_warnings
= 0;
942 flag_fatal_warnings
= 0;
945 case OPTION_WARN_FATAL
:
946 flag_no_warnings
= 0;
947 flag_fatal_warnings
= 1;
950 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
951 case OPTION_EXECSTACK
:
953 flag_noexecstack
= 0;
956 case OPTION_NOEXECSTACK
:
957 flag_noexecstack
= 1;
961 case OPTION_SIZE_CHECK
:
962 if (strcasecmp (optarg
, "error") == 0)
963 flag_allow_nonconst_size
= false;
964 else if (strcasecmp (optarg
, "warning") == 0)
965 flag_allow_nonconst_size
= true;
967 as_fatal (_("Invalid --size-check= option: `%s'"), optarg
);
970 case OPTION_ELF_STT_COMMON
:
971 if (strcasecmp (optarg
, "no") == 0)
972 flag_use_elf_stt_common
= 0;
973 else if (strcasecmp (optarg
, "yes") == 0)
974 flag_use_elf_stt_common
= 1;
976 as_fatal (_("Invalid --elf-stt-common= option: `%s'"),
980 case OPTION_SECTNAME_SUBST
:
981 flag_sectname_subst
= 1;
984 case OPTION_ELF_BUILD_NOTES
:
985 if (strcasecmp (optarg
, "no") == 0)
986 flag_generate_build_notes
= false;
987 else if (strcasecmp (optarg
, "yes") == 0)
988 flag_generate_build_notes
= true;
990 as_fatal (_("Invalid --generate-missing-build-notes option: `%s'"),
997 flag_always_generate_output
= 1;
1001 listing
|= LISTING_LISTING
;
1003 listing_filename
= xstrdup (optarg
);
1006 case OPTION_ALTERNATE
:
1007 optarg
= old_argv
[optind
- 1];
1008 while (* optarg
== '-')
1011 if (strcmp (optarg
, "alternate") == 0)
1013 flag_macro_alternate
= 1;
1022 if (optarg
!= old_argv
[optind
] && optarg
[-1] == '=')
1025 if (md_parse_option (optc
, optarg
) != 0)
1033 listing
|= LISTING_NOCOND
;
1036 listing
|= LISTING_NODEBUG
;
1039 listing
|= LISTING_GENERAL
;
1042 listing
|= LISTING_HLL
;
1045 listing
|= LISTING_LISTING
;
1048 listing
|= LISTING_MACEXP
;
1051 listing
|= LISTING_NOFORM
;
1054 listing
|= LISTING_SYMBOLS
;
1057 listing_filename
= xstrdup (optarg
+ 1);
1058 optarg
+= strlen (listing_filename
);
1061 as_fatal (_("invalid listing option `%c'"), *optarg
);
1068 listing
= LISTING_DEFAULT
;
1072 /* DEBUG is implemented: it debugs different
1073 things from other people's assemblers. */
1078 flag_no_comments
= 1;
1082 { /* Include file directory. */
1083 char *temp
= xstrdup (optarg
);
1085 add_include_dir (temp
);
1090 out_file_name
= xstrdup (optarg
);
1097 /* -X means treat warnings as errors. */
1100 case OPTION_REDUCE_MEMORY_OVERHEADS
:
1103 case OPTION_HASH_TABLE_SIZE
:
1114 #ifdef md_after_parse_args
1115 md_after_parse_args ();
1120 dump_statistics (void)
1122 long run_time
= get_run_time () - start_time
;
1124 fprintf (stderr
, _("%s: total time in assembly: %ld.%06ld\n"),
1125 myname
, run_time
/ 1000000, run_time
% 1000000);
1127 subsegs_print_statistics (stderr
);
1128 write_print_statistics (stderr
);
1129 symbol_print_statistics (stderr
);
1130 read_print_statistics (stderr
);
1132 #ifdef tc_print_statistics
1133 tc_print_statistics (stderr
);
1136 #ifdef obj_print_statistics
1137 obj_print_statistics (stderr
);
1142 close_output_file (void)
1144 output_file_close (out_file_name
);
1146 unlink_if_ordinary (out_file_name
);
1149 /* The interface between the macro code and gas expression handling. */
1152 macro_expr (const char *emsg
, size_t idx
, sb
*in
, offsetT
*val
)
1158 temp_ilp (in
->ptr
+ idx
);
1159 expression_and_evaluate (&ex
);
1160 idx
= input_line_pointer
- in
->ptr
;
1163 if (ex
.X_op
!= O_constant
)
1164 as_bad ("%s", emsg
);
1166 *val
= ex
.X_add_number
;
1171 /* Here to attempt 1 pass over each input file.
1172 We scan argv[*] looking for filenames or exactly "" which is
1173 shorthand for stdin. Any argv that is NULL is not a file-name.
1174 We set need_pass_2 TRUE if, after this, we still have unresolved
1175 expressions of the form (unknown value)+-(unknown value).
1177 Note the un*x semantics: there is only 1 logical input file, but it
1178 may be a catenation of many 'physical' input files. */
1181 perform_an_assembly_pass (int argc
, char ** argv
)
1185 flagword applicable
;
1191 /* Create the standard sections, and those the assembler uses
1193 text_section
= subseg_new (TEXT_SECTION_NAME
, 0);
1194 data_section
= subseg_new (DATA_SECTION_NAME
, 0);
1195 bss_section
= subseg_new (BSS_SECTION_NAME
, 0);
1196 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1197 to have relocs, otherwise we don't find out in time. */
1198 applicable
= bfd_applicable_section_flags (stdoutput
);
1199 bfd_set_section_flags (text_section
,
1200 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1201 | SEC_CODE
| SEC_READONLY
));
1202 bfd_set_section_flags (data_section
,
1203 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1205 bfd_set_section_flags (bss_section
, applicable
& SEC_ALLOC
);
1206 seg_info (bss_section
)->bss
= 1;
1208 subseg_new (BFD_ABS_SECTION_NAME
, 0);
1209 subseg_new (BFD_UND_SECTION_NAME
, 0);
1210 reg_section
= subseg_new ("*GAS `reg' section*", 0);
1211 expr_section
= subseg_new ("*GAS `expr' section*", 0);
1214 subseg_set (text_section
, 0);
1217 /* This may add symbol table entries, which requires having an open BFD,
1218 and sections already created. */
1235 { /* Is it a file-name argument? */
1238 /* argv->"" if stdin desired, else->filename. */
1239 read_a_source_file (*argv
);
1241 argv
++; /* Completed that argv. */
1244 read_a_source_file ("");
1249 main (int argc
, char ** argv
)
1251 char ** argv_orig
= argv
;
1256 start_time
= get_run_time ();
1259 #ifdef HAVE_LC_MESSAGES
1260 setlocale (LC_MESSAGES
, "");
1262 setlocale (LC_CTYPE
, "");
1263 bindtextdomain (PACKAGE
, LOCALEDIR
);
1264 textdomain (PACKAGE
);
1269 #ifdef HOST_SPECIAL_INIT
1270 HOST_SPECIAL_INIT (argc
, argv
);
1274 xmalloc_set_program_name (myname
);
1276 expandargv (&argc
, &argv
);
1278 START_PROGRESS (myname
, 0);
1280 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1281 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1284 out_file_name
= OBJ_DEFAULT_OUTPUT_FILE_NAME
;
1287 if (bfd_init () != BFD_INIT_MAGIC
)
1288 as_fatal (_("libbfd ABI mismatch"));
1289 bfd_set_error_program_name (myname
);
1291 #ifdef USE_EMULATIONS
1292 select_emulation_mode (argc
, argv
);
1296 /* Call parse_args before any of the init/begin functions
1297 so that switches like --hash-size can be honored. */
1298 parse_args (&argc
, &argv
);
1300 if (argc
> 1 && stat (out_file_name
, &sob
) == 0)
1304 for (i
= 1; i
< argc
; ++i
)
1308 /* Check that the input file and output file are different. */
1309 if (stat (argv
[i
], &sib
) == 0
1310 && sib
.st_ino
== sob
.st_ino
1311 /* POSIX emulating systems may support stat() but if the
1312 underlying file system does not support a file serial number
1313 of some kind then they will return 0 for the inode. So
1314 two files with an inode of 0 may not actually be the same.
1315 On real POSIX systems no ordinary file will ever have an
1318 /* Different files may have the same inode number if they
1319 reside on different devices, so check the st_dev field as
1321 && sib
.st_dev
== sob
.st_dev
1322 /* PR 25572: Only check regular files. Devices, sockets and so
1323 on might actually work as both input and output. Plus there
1324 is a use case for using /dev/null as both input and output
1325 when checking for command line option support in a script:
1326 as --foo /dev/null -o /dev/null; if $? then ... */
1327 && S_ISREG (sib
.st_mode
))
1329 const char *saved_out_file_name
= out_file_name
;
1331 /* Don't let as_fatal remove the output file! */
1332 out_file_name
= NULL
;
1333 as_fatal (_("The input '%s' and output '%s' files are the same"),
1334 argv
[i
], saved_out_file_name
);
1343 input_scrub_begin ();
1346 /* It has to be called after dump_statistics (). */
1347 xatexit (close_output_file
);
1349 if (flag_print_statistics
)
1350 xatexit (dump_statistics
);
1354 macro_strip_at
= flag_mri
;
1357 macro_init (flag_macro_alternate
, flag_mri
, macro_strip_at
, macro_expr
);
1361 output_file_create (out_file_name
);
1362 gas_assert (stdoutput
!= 0);
1366 #ifdef tc_init_after_args
1367 tc_init_after_args ();
1374 local_symbol_make (".gasversion.", absolute_section
,
1375 &predefined_address_frag
, BFD_VERSION
/ 10000UL);
1377 /* Now that we have fully initialized, and have created the output
1378 file, define any symbols requested by --defsym command line
1380 while (defsyms
!= NULL
)
1383 struct defsym_list
*next
;
1385 sym
= symbol_new (defsyms
->name
, absolute_section
,
1386 &zero_address_frag
, defsyms
->value
);
1387 /* Make symbols defined on the command line volatile, so that they
1388 can be redefined inside a source file. This makes this assembler's
1389 behaviour compatible with earlier versions, but it may not be
1390 completely intuitive. */
1391 S_SET_VOLATILE (sym
);
1392 symbol_table_insert (sym
);
1393 next
= defsyms
->next
;
1401 perform_an_assembly_pass (argc
, argv
);
1403 cond_finish_check (-1);
1409 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1410 if ((flag_execstack
|| flag_noexecstack
)
1411 && OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
1415 gnustack
= subseg_new (".note.GNU-stack", 0);
1416 bfd_set_section_flags (gnustack
,
1417 SEC_READONLY
| (flag_execstack
? SEC_CODE
: 0));
1422 /* If we've been collecting dwarf2 .debug_line info, either for
1423 assembly debugging or on behalf of the compiler, emit it now. */
1426 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1427 directives from the user or by the backend, emit it now. */
1431 if (seen_at_least_1_file ())
1433 int n_warns
, n_errs
;
1437 write_object_file ();
1439 n_warns
= had_warnings ();
1440 n_errs
= had_errors ();
1443 ngettext ("%d warning", "%d warnings", n_warns
), n_warns
);
1445 ngettext ("%d error", "%d errors", n_errs
), n_errs
);
1446 if (flag_fatal_warnings
&& n_warns
!= 0)
1449 as_bad (_("%s, treating warnings as errors"), warn_msg
);
1455 else if (flag_always_generate_output
)
1457 /* The -Z flag indicates that an object file should be generated,
1458 regardless of warnings and errors. */
1460 fprintf (stderr
, _("%s, %s, generating bad object file\n"),
1468 listing_print (listing_filename
, argv_orig
);
1473 END_PROGRESS (myname
);
1475 /* Use xexit instead of return, because under VMS environments they
1476 may not place the same interpretation on the value given. */
1477 if (had_errors () != 0)
1478 xexit (EXIT_FAILURE
);
1480 /* Only generate dependency file if assembler was successful. */
1481 print_dependencies ();
1483 xexit (EXIT_SUCCESS
);