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 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 bfd_boolean 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 (!strncmp ("--em", argv
[i
], 4))
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 --hash-size=<value> set the hash table size close to <value>\n"));
350 fprintf (stream
, _("\
351 --help show this message and exit\n"));
352 fprintf (stream
, _("\
353 --target-help show target specific options\n"));
354 fprintf (stream
, _("\
355 -I DIR add DIR to search list for .include directives\n"));
356 fprintf (stream
, _("\
357 -J don't warn about signed overflow\n"));
358 fprintf (stream
, _("\
359 -K warn when differences altered for long displacements\n"));
360 fprintf (stream
, _("\
361 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
362 fprintf (stream
, _("\
363 -M,--mri assemble in MRI compatibility mode\n"));
364 fprintf (stream
, _("\
365 --MD FILE write dependency information in FILE (default none)\n"));
366 fprintf (stream
, _("\
368 fprintf (stream
, _("\
369 -no-pad-sections do not pad the end of sections to alignment boundaries\n"));
370 fprintf (stream
, _("\
371 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
372 fprintf (stream
, _("\
373 -R fold data section into text section\n"));
374 fprintf (stream
, _("\
375 --reduce-memory-overheads \n\
376 prefer smaller memory use at the cost of longer\n\
378 fprintf (stream
, _("\
379 --statistics print various measured statistics from execution\n"));
380 fprintf (stream
, _("\
381 --strip-local-absolute strip local absolute symbols\n"));
382 fprintf (stream
, _("\
383 --traditional-format Use same format as native assembler when possible\n"));
384 fprintf (stream
, _("\
385 --version print assembler version number and exit\n"));
386 fprintf (stream
, _("\
387 -W --no-warn suppress warnings\n"));
388 fprintf (stream
, _("\
389 --warn don't suppress warnings\n"));
390 fprintf (stream
, _("\
391 --fatal-warnings treat warnings as errors\n"));
393 fprintf (stream
, _("\
394 --itbl INSTTBL extend instruction set to include instructions\n\
395 matching the specifications defined in file INSTTBL\n"));
397 fprintf (stream
, _("\
399 fprintf (stream
, _("\
401 fprintf (stream
, _("\
402 -Z generate object file even after errors\n"));
403 fprintf (stream
, _("\
404 --listing-lhs-width set the width in words of the output data column of\n\
406 fprintf (stream
, _("\
407 --listing-lhs-width2 set the width in words of the continuation lines\n\
408 of the output data column; ignored if smaller than\n\
409 the width of the first line\n"));
410 fprintf (stream
, _("\
411 --listing-rhs-width set the max width in characters of the lines from\n\
412 the source file\n"));
413 fprintf (stream
, _("\
414 --listing-cont-lines set the maximum number of continuation lines used\n\
415 for the output data column of the listing\n"));
416 fprintf (stream
, _("\
417 @FILE read options from FILE\n"));
419 md_show_usage (stream
);
421 fputc ('\n', stream
);
423 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
424 fprintf (stream
, _("Report bugs to %s\n"), REPORT_BUGS_TO
);
427 /* Since it is easy to do here we interpret the special arg "-"
428 to mean "use stdin" and we set that argv[] pointing to "".
429 After we have munged argv[], the only things left are source file
430 name(s) and ""(s) denoting stdin. These file names are used
431 (perhaps more than once) later.
433 check for new machine-dep cmdline options in
434 md_parse_option definitions in config/tc-*.c. */
437 parse_args (int * pargc
, char *** pargv
)
443 /* Starting the short option string with '-' is for programs that
444 expect options and other ARGV-elements in any order and that care about
445 the ordering of the two. We describe each non-option ARGV-element
446 as if it were the argument of an option with character code 1. */
448 extern const char *md_shortopts
;
449 static const char std_shortopts
[] =
452 #ifndef WORKING_DOT_WORD
453 /* -K is not meaningful if .word is not being hacked. */
456 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
458 /* -v takes an argument on VMS, so we don't make it a generic
464 /* New option for extending instruction set (see also --itbl below). */
469 struct option
*longopts
;
470 extern struct option md_longopts
[];
471 extern size_t md_longopts_size
;
472 /* Codes used for the long options with no short synonyms. */
475 OPTION_HELP
= OPTION_STD_BASE
,
482 OPTION_DEBUG_PREFIX_MAP
,
484 OPTION_LISTING_LHS_WIDTH
,
485 OPTION_LISTING_LHS_WIDTH2
,
486 OPTION_LISTING_RHS_WIDTH
,
487 OPTION_LISTING_CONT_LINES
,
495 OPTION_GDWARF_SECTIONS
,
496 OPTION_GDWARF_CIE_VERSION
,
497 OPTION_STRIP_LOCAL_ABSOLUTE
,
498 OPTION_TRADITIONAL_FORMAT
,
504 OPTION_ELF_STT_COMMON
,
505 OPTION_ELF_BUILD_NOTES
,
506 OPTION_SECTNAME_SUBST
,
509 OPTION_HASH_TABLE_SIZE
,
510 OPTION_REDUCE_MEMORY_OVERHEADS
,
512 OPTION_COMPRESS_DEBUG
,
513 OPTION_NOCOMPRESS_DEBUG
,
514 OPTION_NO_PAD_SECTIONS
/* = STD_BASE + 40 */
515 /* When you add options here, check that they do
516 not collide with OPTION_MD_BASE. See as.h. */
519 static const struct option std_longopts
[] =
521 /* Note: commas are placed at the start of the line rather than
522 the end of the preceding line so that it is simpler to
523 selectively add and remove lines from this list. */
524 {"alternate", no_argument
, NULL
, OPTION_ALTERNATE
}
525 /* The entry for "a" is here to prevent getopt_long_only() from
526 considering that -a is an abbreviation for --alternate. This is
527 necessary because -a=<FILE> is a valid switch but getopt would
528 normally reject it since --alternate does not take an argument. */
529 ,{"a", optional_argument
, NULL
, 'a'}
530 /* Handle -al=<FILE>. */
531 ,{"al", optional_argument
, NULL
, OPTION_AL
}
532 ,{"compress-debug-sections", optional_argument
, NULL
, OPTION_COMPRESS_DEBUG
}
533 ,{"nocompress-debug-sections", no_argument
, NULL
, OPTION_NOCOMPRESS_DEBUG
}
534 ,{"debug-prefix-map", required_argument
, NULL
, OPTION_DEBUG_PREFIX_MAP
}
535 ,{"defsym", required_argument
, NULL
, OPTION_DEFSYM
}
536 ,{"dump-config", no_argument
, NULL
, OPTION_DUMPCONFIG
}
537 ,{"emulation", required_argument
, NULL
, OPTION_EMULATION
}
538 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
539 ,{"execstack", no_argument
, NULL
, OPTION_EXECSTACK
}
540 ,{"noexecstack", no_argument
, NULL
, OPTION_NOEXECSTACK
}
541 ,{"size-check", required_argument
, NULL
, OPTION_SIZE_CHECK
}
542 ,{"elf-stt-common", required_argument
, NULL
, OPTION_ELF_STT_COMMON
}
543 ,{"sectname-subst", no_argument
, NULL
, OPTION_SECTNAME_SUBST
}
544 ,{"generate-missing-build-notes", required_argument
, NULL
, OPTION_ELF_BUILD_NOTES
}
546 ,{"fatal-warnings", no_argument
, NULL
, OPTION_WARN_FATAL
}
547 ,{"gdwarf-2", no_argument
, NULL
, OPTION_GDWARF_2
}
548 ,{"gdwarf-3", no_argument
, NULL
, OPTION_GDWARF_3
}
549 ,{"gdwarf-4", no_argument
, NULL
, OPTION_GDWARF_4
}
550 ,{"gdwarf-5", no_argument
, NULL
, OPTION_GDWARF_5
}
551 /* GCC uses --gdwarf-2 but GAS used to to use --gdwarf2,
552 so we keep it here for backwards compatibility. */
553 ,{"gdwarf2", no_argument
, NULL
, OPTION_GDWARF_2
}
554 ,{"gdwarf-sections", no_argument
, NULL
, OPTION_GDWARF_SECTIONS
}
555 ,{"gdwarf-cie-version", required_argument
, NULL
, OPTION_GDWARF_CIE_VERSION
}
556 ,{"gen-debug", no_argument
, NULL
, 'g'}
557 ,{"gstabs", no_argument
, NULL
, OPTION_GSTABS
}
558 ,{"gstabs+", no_argument
, NULL
, OPTION_GSTABS_PLUS
}
559 ,{"hash-size", required_argument
, NULL
, OPTION_HASH_TABLE_SIZE
}
560 ,{"help", no_argument
, NULL
, OPTION_HELP
}
562 /* New option for extending instruction set (see also -t above).
563 The "-t file" or "--itbl file" option extends the basic set of
564 valid instructions by reading "file", a text file containing a
565 list of instruction formats. The additional opcodes and their
566 formats are added to the built-in set of instructions, and
567 mnemonics for new registers may also be defined. */
568 ,{"itbl", required_argument
, NULL
, 't'}
570 /* getopt allows abbreviations, so we do this to stop it from
571 treating -k as an abbreviation for --keep-locals. Some
572 ports use -k to enable PIC assembly. */
573 ,{"keep-locals", no_argument
, NULL
, 'L'}
574 ,{"keep-locals", no_argument
, NULL
, 'L'}
575 ,{"listing-lhs-width", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH
}
576 ,{"listing-lhs-width2", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH2
}
577 ,{"listing-rhs-width", required_argument
, NULL
, OPTION_LISTING_RHS_WIDTH
}
578 ,{"listing-cont-lines", required_argument
, NULL
, OPTION_LISTING_CONT_LINES
}
579 ,{"MD", required_argument
, NULL
, OPTION_DEPFILE
}
580 ,{"mri", no_argument
, NULL
, 'M'}
581 ,{"nocpp", no_argument
, NULL
, OPTION_NOCPP
}
582 ,{"no-pad-sections", no_argument
, NULL
, OPTION_NO_PAD_SECTIONS
}
583 ,{"no-warn", no_argument
, NULL
, 'W'}
584 ,{"reduce-memory-overheads", no_argument
, NULL
, OPTION_REDUCE_MEMORY_OVERHEADS
}
585 ,{"statistics", no_argument
, NULL
, OPTION_STATISTICS
}
586 ,{"strip-local-absolute", no_argument
, NULL
, OPTION_STRIP_LOCAL_ABSOLUTE
}
587 ,{"version", no_argument
, NULL
, OPTION_VERSION
}
588 ,{"verbose", no_argument
, NULL
, OPTION_VERBOSE
}
589 ,{"target-help", no_argument
, NULL
, OPTION_TARGET_HELP
}
590 ,{"traditional-format", no_argument
, NULL
, OPTION_TRADITIONAL_FORMAT
}
591 ,{"warn", no_argument
, NULL
, OPTION_WARN
}
594 /* Construct the option lists from the standard list and the target
595 dependent list. Include space for an extra NULL option and
596 always NULL terminate. */
597 shortopts
= concat (std_shortopts
, md_shortopts
, (char *) NULL
);
598 longopts
= (struct option
*) xmalloc (sizeof (std_longopts
)
599 + md_longopts_size
+ sizeof (struct option
));
600 memcpy (longopts
, std_longopts
, sizeof (std_longopts
));
601 memcpy (((char *) longopts
) + sizeof (std_longopts
), md_longopts
, md_longopts_size
);
602 memset (((char *) longopts
) + sizeof (std_longopts
) + md_longopts_size
,
603 0, sizeof (struct option
));
605 /* Make a local copy of the old argv. */
609 /* Initialize a new argv that contains no options. */
610 new_argv
= XNEWVEC (char *, old_argc
+ 1);
611 new_argv
[0] = old_argv
[0];
613 new_argv
[new_argc
] = NULL
;
617 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
618 indicate a long option. */
620 int optc
= getopt_long_only (old_argc
, old_argv
, shortopts
, longopts
,
629 /* md_parse_option should return 1 if it recognizes optc,
631 if (md_parse_option (optc
, optarg
) != 0)
633 /* `-v' isn't included in the general short_opts list, so check for
634 it explicitly here before deciding we've gotten a bad argument. */
638 /* Telling getopt to treat -v's value as optional can result
639 in it picking up a following filename argument here. The
640 VMS code in md_parse_option can return 0 in that case,
641 but it has no way of pushing the filename argument back. */
642 if (optarg
&& *optarg
)
643 new_argv
[new_argc
++] = optarg
, new_argv
[new_argc
] = NULL
;
654 as_bad (_("unrecognized option -%c%s"), optc
, optarg
? optarg
: "");
660 case 1: /* File name. */
661 if (!strcmp (optarg
, "-"))
662 optarg
= (char *) "";
663 new_argv
[new_argc
++] = optarg
;
664 new_argv
[new_argc
] = NULL
;
667 case OPTION_TARGET_HELP
:
668 md_show_usage (stdout
);
678 case OPTION_NO_PAD_SECTIONS
:
679 do_not_pad_sections_to_alignment
= 1;
682 case OPTION_STATISTICS
:
683 flag_print_statistics
= 1;
686 case OPTION_STRIP_LOCAL_ABSOLUTE
:
687 flag_strip_local_absolute
= 1;
690 case OPTION_TRADITIONAL_FORMAT
:
691 flag_traditional_format
= 1;
695 /* This output is intended to follow the GNU standards document. */
696 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING
);
697 printf (_("Copyright (C) 2020 Free Software Foundation, Inc.\n"));
699 This program is free software; you may redistribute it under the terms of\n\
700 the GNU General Public License version 3 or later.\n\
701 This program has absolutely no warranty.\n"));
702 #ifdef TARGET_WITH_CPU
703 printf (_("This assembler was configured for a target of `%s' "
704 "and default,\ncpu type `%s'.\n"),
705 TARGET_ALIAS
, TARGET_WITH_CPU
);
707 printf (_("This assembler was configured for a target of `%s'.\n"),
712 case OPTION_EMULATION
:
713 #ifdef USE_EMULATIONS
714 if (strcmp (optarg
, this_emulation
->name
))
715 as_fatal (_("multiple emulation names specified"));
717 as_fatal (_("emulations not handled in this configuration"));
721 case OPTION_DUMPCONFIG
:
722 fprintf (stderr
, _("alias = %s\n"), TARGET_ALIAS
);
723 fprintf (stderr
, _("canonical = %s\n"), TARGET_CANONICAL
);
724 fprintf (stderr
, _("cpu-type = %s\n"), TARGET_CPU
);
725 #ifdef TARGET_OBJ_FORMAT
726 fprintf (stderr
, _("format = %s\n"), TARGET_OBJ_FORMAT
);
729 fprintf (stderr
, _("bfd-target = %s\n"), TARGET_FORMAT
);
733 case OPTION_COMPRESS_DEBUG
:
736 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
737 if (strcasecmp (optarg
, "none") == 0)
738 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
739 else if (strcasecmp (optarg
, "zlib") == 0)
740 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
741 else if (strcasecmp (optarg
, "zlib-gnu") == 0)
742 flag_compress_debug
= COMPRESS_DEBUG_GNU_ZLIB
;
743 else if (strcasecmp (optarg
, "zlib-gabi") == 0)
744 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
746 as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
749 as_fatal (_("--compress-debug-sections=%s is unsupported"),
754 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
757 case OPTION_NOCOMPRESS_DEBUG
:
758 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
761 case OPTION_DEBUG_PREFIX_MAP
:
762 add_debug_prefix_map (optarg
);
769 struct defsym_list
*n
;
771 for (s
= optarg
; *s
!= '\0' && *s
!= '='; s
++)
774 as_fatal (_("bad defsym; format is --defsym name=value"));
776 i
= bfd_scan_vma (s
, (const char **) NULL
, 0);
777 n
= XNEW (struct defsym_list
);
788 /* optarg is the name of the file containing the instruction
789 formats, opcodes, register names, etc. */
790 struct itbl_file_list
*n
;
794 as_warn (_("no file name following -t option"));
798 n
= XNEW (struct itbl_file_list
);
799 n
->next
= itbl_files
;
803 /* Parse the file and add the new instructions to our internal
804 table. If multiple instruction tables are specified, the
805 information from this table gets appended onto the existing
807 itbl_files
->name
= xstrdup (optarg
);
808 if (itbl_parse (itbl_files
->name
) != 0)
809 as_fatal (_("failed to read instruction table %s\n"),
816 start_dependencies (optarg
);
820 /* Some backends, eg Alpha and Mips, use the -g switch for their
821 own purposes. So we check here for an explicit -g and allow
822 the backend to decide if it wants to process it. */
823 if ( old_argv
[optind
- 1][1] == 'g'
824 && md_parse_option (optc
, optarg
))
827 if (md_debug_format_selector
)
828 debug_type
= md_debug_format_selector (& use_gnu_debug_info_extensions
);
831 debug_type
= DEBUG_DWARF2
;
835 debug_type
= DEBUG_STABS
;
838 case OPTION_GSTABS_PLUS
:
839 use_gnu_debug_info_extensions
= 1;
842 debug_type
= DEBUG_STABS
;
845 case OPTION_GDWARF_2
:
846 debug_type
= DEBUG_DWARF2
;
850 case OPTION_GDWARF_3
:
851 debug_type
= DEBUG_DWARF2
;
855 case OPTION_GDWARF_4
:
856 debug_type
= DEBUG_DWARF2
;
860 case OPTION_GDWARF_5
:
861 debug_type
= DEBUG_DWARF2
;
865 case OPTION_GDWARF_SECTIONS
:
866 flag_dwarf_sections
= TRUE
;
869 case OPTION_GDWARF_CIE_VERSION
:
870 flag_dwarf_cie_version
= atoi (optarg
);
871 /* The available CIE versions are 1 (DWARF 2), 3 (DWARF 3), and 4
873 if (flag_dwarf_cie_version
< 1
874 || flag_dwarf_cie_version
== 2
875 || flag_dwarf_cie_version
> 4)
876 as_fatal (_("Invalid --gdwarf-cie-version `%s'"), optarg
);
877 switch (flag_dwarf_cie_version
)
895 flag_signed_overflow_ok
= 1;
898 #ifndef WORKING_DOT_WORD
900 flag_warn_displacement
= 1;
904 flag_keep_locals
= 1;
907 case OPTION_LISTING_LHS_WIDTH
:
908 listing_lhs_width
= atoi (optarg
);
909 if (listing_lhs_width_second
< listing_lhs_width
)
910 listing_lhs_width_second
= listing_lhs_width
;
912 case OPTION_LISTING_LHS_WIDTH2
:
914 int tmp
= atoi (optarg
);
916 if (tmp
> listing_lhs_width
)
917 listing_lhs_width_second
= tmp
;
920 case OPTION_LISTING_RHS_WIDTH
:
921 listing_rhs_width
= atoi (optarg
);
923 case OPTION_LISTING_CONT_LINES
:
924 listing_lhs_cont_lines
= atoi (optarg
);
935 flag_readonly_data_in_text
= 1;
939 flag_no_warnings
= 1;
943 flag_no_warnings
= 0;
944 flag_fatal_warnings
= 0;
947 case OPTION_WARN_FATAL
:
948 flag_no_warnings
= 0;
949 flag_fatal_warnings
= 1;
952 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
953 case OPTION_EXECSTACK
:
955 flag_noexecstack
= 0;
958 case OPTION_NOEXECSTACK
:
959 flag_noexecstack
= 1;
963 case OPTION_SIZE_CHECK
:
964 if (strcasecmp (optarg
, "error") == 0)
965 flag_allow_nonconst_size
= FALSE
;
966 else if (strcasecmp (optarg
, "warning") == 0)
967 flag_allow_nonconst_size
= TRUE
;
969 as_fatal (_("Invalid --size-check= option: `%s'"), optarg
);
972 case OPTION_ELF_STT_COMMON
:
973 if (strcasecmp (optarg
, "no") == 0)
974 flag_use_elf_stt_common
= 0;
975 else if (strcasecmp (optarg
, "yes") == 0)
976 flag_use_elf_stt_common
= 1;
978 as_fatal (_("Invalid --elf-stt-common= option: `%s'"),
982 case OPTION_SECTNAME_SUBST
:
983 flag_sectname_subst
= 1;
986 case OPTION_ELF_BUILD_NOTES
:
987 if (strcasecmp (optarg
, "no") == 0)
988 flag_generate_build_notes
= FALSE
;
989 else if (strcasecmp (optarg
, "yes") == 0)
990 flag_generate_build_notes
= TRUE
;
992 as_fatal (_("Invalid --generate-missing-build-notes option: `%s'"),
999 flag_always_generate_output
= 1;
1003 listing
|= LISTING_LISTING
;
1005 listing_filename
= xstrdup (optarg
);
1008 case OPTION_ALTERNATE
:
1009 optarg
= old_argv
[optind
- 1];
1010 while (* optarg
== '-')
1013 if (strcmp (optarg
, "alternate") == 0)
1015 flag_macro_alternate
= 1;
1024 if (optarg
!= old_argv
[optind
] && optarg
[-1] == '=')
1027 if (md_parse_option (optc
, optarg
) != 0)
1035 listing
|= LISTING_NOCOND
;
1038 listing
|= LISTING_NODEBUG
;
1041 listing
|= LISTING_GENERAL
;
1044 listing
|= LISTING_HLL
;
1047 listing
|= LISTING_LISTING
;
1050 listing
|= LISTING_MACEXP
;
1053 listing
|= LISTING_NOFORM
;
1056 listing
|= LISTING_SYMBOLS
;
1059 listing_filename
= xstrdup (optarg
+ 1);
1060 optarg
+= strlen (listing_filename
);
1063 as_fatal (_("invalid listing option `%c'"), *optarg
);
1070 listing
= LISTING_DEFAULT
;
1074 /* DEBUG is implemented: it debugs different
1075 things from other people's assemblers. */
1080 flag_no_comments
= 1;
1084 { /* Include file directory. */
1085 char *temp
= xstrdup (optarg
);
1087 add_include_dir (temp
);
1092 out_file_name
= xstrdup (optarg
);
1099 /* -X means treat warnings as errors. */
1102 case OPTION_REDUCE_MEMORY_OVERHEADS
:
1103 /* The only change we make at the moment is to reduce
1104 the size of the hash tables that we use. */
1105 set_gas_hash_table_size (4051);
1108 case OPTION_HASH_TABLE_SIZE
:
1110 unsigned long new_size
;
1112 new_size
= strtoul (optarg
, NULL
, 0);
1114 set_gas_hash_table_size (new_size
);
1116 as_fatal (_("--hash-size needs a numeric argument"));
1128 #ifdef md_after_parse_args
1129 md_after_parse_args ();
1134 dump_statistics (void)
1136 long run_time
= get_run_time () - start_time
;
1138 fprintf (stderr
, _("%s: total time in assembly: %ld.%06ld\n"),
1139 myname
, run_time
/ 1000000, run_time
% 1000000);
1141 subsegs_print_statistics (stderr
);
1142 write_print_statistics (stderr
);
1143 symbol_print_statistics (stderr
);
1144 read_print_statistics (stderr
);
1146 #ifdef tc_print_statistics
1147 tc_print_statistics (stderr
);
1150 #ifdef obj_print_statistics
1151 obj_print_statistics (stderr
);
1156 close_output_file (void)
1158 output_file_close (out_file_name
);
1160 unlink_if_ordinary (out_file_name
);
1163 /* The interface between the macro code and gas expression handling. */
1166 macro_expr (const char *emsg
, size_t idx
, sb
*in
, offsetT
*val
)
1172 temp_ilp (in
->ptr
+ idx
);
1173 expression_and_evaluate (&ex
);
1174 idx
= input_line_pointer
- in
->ptr
;
1177 if (ex
.X_op
!= O_constant
)
1178 as_bad ("%s", emsg
);
1180 *val
= ex
.X_add_number
;
1185 /* Here to attempt 1 pass over each input file.
1186 We scan argv[*] looking for filenames or exactly "" which is
1187 shorthand for stdin. Any argv that is NULL is not a file-name.
1188 We set need_pass_2 TRUE if, after this, we still have unresolved
1189 expressions of the form (unknown value)+-(unknown value).
1191 Note the un*x semantics: there is only 1 logical input file, but it
1192 may be a catenation of many 'physical' input files. */
1195 perform_an_assembly_pass (int argc
, char ** argv
)
1199 flagword applicable
;
1205 /* Create the standard sections, and those the assembler uses
1207 text_section
= subseg_new (TEXT_SECTION_NAME
, 0);
1208 data_section
= subseg_new (DATA_SECTION_NAME
, 0);
1209 bss_section
= subseg_new (BSS_SECTION_NAME
, 0);
1210 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1211 to have relocs, otherwise we don't find out in time. */
1212 applicable
= bfd_applicable_section_flags (stdoutput
);
1213 bfd_set_section_flags (text_section
,
1214 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1215 | SEC_CODE
| SEC_READONLY
));
1216 bfd_set_section_flags (data_section
,
1217 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1219 bfd_set_section_flags (bss_section
, applicable
& SEC_ALLOC
);
1220 seg_info (bss_section
)->bss
= 1;
1222 subseg_new (BFD_ABS_SECTION_NAME
, 0);
1223 subseg_new (BFD_UND_SECTION_NAME
, 0);
1224 reg_section
= subseg_new ("*GAS `reg' section*", 0);
1225 expr_section
= subseg_new ("*GAS `expr' section*", 0);
1228 subseg_set (text_section
, 0);
1231 /* This may add symbol table entries, which requires having an open BFD,
1232 and sections already created. */
1249 { /* Is it a file-name argument? */
1252 /* argv->"" if stdin desired, else->filename. */
1253 read_a_source_file (*argv
);
1255 argv
++; /* Completed that argv. */
1258 read_a_source_file ("");
1263 main (int argc
, char ** argv
)
1265 char ** argv_orig
= argv
;
1270 start_time
= get_run_time ();
1273 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
1274 setlocale (LC_MESSAGES
, "");
1276 #if defined (HAVE_SETLOCALE)
1277 setlocale (LC_CTYPE
, "");
1279 bindtextdomain (PACKAGE
, LOCALEDIR
);
1280 textdomain (PACKAGE
);
1285 #ifdef HOST_SPECIAL_INIT
1286 HOST_SPECIAL_INIT (argc
, argv
);
1290 xmalloc_set_program_name (myname
);
1292 expandargv (&argc
, &argv
);
1294 START_PROGRESS (myname
, 0);
1296 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1297 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1300 out_file_name
= OBJ_DEFAULT_OUTPUT_FILE_NAME
;
1303 if (bfd_init () != BFD_INIT_MAGIC
)
1304 as_fatal (_("libbfd ABI mismatch"));
1305 bfd_set_error_program_name (myname
);
1307 #ifdef USE_EMULATIONS
1308 select_emulation_mode (argc
, argv
);
1312 /* Call parse_args before any of the init/begin functions
1313 so that switches like --hash-size can be honored. */
1314 parse_args (&argc
, &argv
);
1316 if (argc
> 1 && stat (out_file_name
, &sob
) == 0)
1320 for (i
= 1; i
< argc
; ++i
)
1324 /* Check that the input file and output file are different. */
1325 if (stat (argv
[i
], &sib
) == 0
1326 && sib
.st_ino
== sob
.st_ino
1327 /* POSIX emulating systems may support stat() but if the
1328 underlying file system does not support a file serial number
1329 of some kind then they will return 0 for the inode. So
1330 two files with an inode of 0 may not actually be the same.
1331 On real POSIX systems no ordinary file will ever have an
1334 /* Different files may have the same inode number if they
1335 reside on different devices, so check the st_dev field as
1337 && sib
.st_dev
== sob
.st_dev
1338 /* PR 25572: Only check regular files. Devices, sockets and so
1339 on might actually work as both input and output. Plus there
1340 is a use case for using /dev/null as both input and output
1341 when checking for command line option support in a script:
1342 as --foo /dev/null -o /dev/null; if $? then ... */
1343 && S_ISREG (sib
.st_mode
))
1345 const char *saved_out_file_name
= out_file_name
;
1347 /* Don't let as_fatal remove the output file! */
1348 out_file_name
= NULL
;
1349 as_fatal (_("The input '%s' and output '%s' files are the same"),
1350 argv
[i
], saved_out_file_name
);
1359 input_scrub_begin ();
1362 /* It has to be called after dump_statistics (). */
1363 xatexit (close_output_file
);
1365 if (flag_print_statistics
)
1366 xatexit (dump_statistics
);
1370 macro_strip_at
= flag_mri
;
1373 macro_init (flag_macro_alternate
, flag_mri
, macro_strip_at
, macro_expr
);
1377 output_file_create (out_file_name
);
1378 gas_assert (stdoutput
!= 0);
1382 #ifdef tc_init_after_args
1383 tc_init_after_args ();
1390 local_symbol_make (".gasversion.", absolute_section
,
1391 BFD_VERSION
/ 10000UL, &predefined_address_frag
);
1393 /* Now that we have fully initialized, and have created the output
1394 file, define any symbols requested by --defsym command line
1396 while (defsyms
!= NULL
)
1399 struct defsym_list
*next
;
1401 sym
= symbol_new (defsyms
->name
, absolute_section
, defsyms
->value
,
1402 &zero_address_frag
);
1403 /* Make symbols defined on the command line volatile, so that they
1404 can be redefined inside a source file. This makes this assembler's
1405 behaviour compatible with earlier versions, but it may not be
1406 completely intuitive. */
1407 S_SET_VOLATILE (sym
);
1408 symbol_table_insert (sym
);
1409 next
= defsyms
->next
;
1417 perform_an_assembly_pass (argc
, argv
);
1419 cond_finish_check (-1);
1425 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1426 if ((flag_execstack
|| flag_noexecstack
)
1427 && OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
1431 gnustack
= subseg_new (".note.GNU-stack", 0);
1432 bfd_set_section_flags (gnustack
,
1433 SEC_READONLY
| (flag_execstack
? SEC_CODE
: 0));
1438 /* If we've been collecting dwarf2 .debug_line info, either for
1439 assembly debugging or on behalf of the compiler, emit it now. */
1442 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1443 directives from the user or by the backend, emit it now. */
1447 if (seen_at_least_1_file ())
1449 int n_warns
, n_errs
;
1453 write_object_file ();
1455 n_warns
= had_warnings ();
1456 n_errs
= had_errors ();
1459 ngettext ("%d warning", "%d warnings", n_warns
), n_warns
);
1461 ngettext ("%d error", "%d errors", n_errs
), n_errs
);
1462 if (flag_fatal_warnings
&& n_warns
!= 0)
1465 as_bad (_("%s, treating warnings as errors"), warn_msg
);
1471 else if (flag_always_generate_output
)
1473 /* The -Z flag indicates that an object file should be generated,
1474 regardless of warnings and errors. */
1476 fprintf (stderr
, _("%s, %s, generating bad object file\n"),
1484 listing_print (listing_filename
, argv_orig
);
1489 END_PROGRESS (myname
);
1491 /* Use xexit instead of return, because under VMS environments they
1492 may not place the same interpretation on the value given. */
1493 if (had_errors () != 0)
1494 xexit (EXIT_FAILURE
);
1496 /* Only generate dependency file if assembler was successful. */
1497 print_dependencies ();
1499 xexit (EXIT_SUCCESS
);