1 /* as.c - GAS main program.
2 Copyright (C) 1987-2022 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
;
120 /* Name of listing file. */
121 static char *listing_filename
= NULL
;
123 static struct defsym_list
*defsyms
;
126 /* Keep a record of the itbl files we read in. */
127 struct itbl_file_list
129 struct itbl_file_list
*next
;
132 static struct itbl_file_list
*itbl_files
;
135 static long start_time
;
137 static int flag_macro_alternate
;
140 #ifdef USE_EMULATIONS
141 #define EMULATION_ENVIRON "AS_EMULATION"
143 extern struct emulation mipsbelf
, mipslelf
, mipself
;
144 extern struct emulation i386coff
, i386elf
, i386aout
;
145 extern struct emulation crisaout
, criself
;
147 static struct emulation
*const emulations
[] = { EMULATIONS
};
148 static const int n_emulations
= sizeof (emulations
) / sizeof (emulations
[0]);
151 select_emulation_mode (int argc
, char **argv
)
155 const char *em
= NULL
;
157 for (i
= 1; i
< argc
; i
++)
158 if (startswith (argv
[i
], "--em"))
164 p
= strchr (argv
[i
], '=');
171 as_fatal (_("missing emulation mode name"));
176 em
= getenv (EMULATION_ENVIRON
);
178 em
= DEFAULT_EMULATION
;
182 for (i
= 0; i
< n_emulations
; i
++)
183 if (!strcmp (emulations
[i
]->name
, em
))
185 if (i
== n_emulations
)
186 as_fatal (_("unrecognized emulation name `%s'"), em
);
187 this_emulation
= emulations
[i
];
190 this_emulation
= emulations
[0];
192 this_emulation
->init ();
196 default_emul_bfd_name (void)
203 common_emul_init (void)
205 this_format
= this_emulation
->format
;
207 if (this_emulation
->leading_underscore
== 2)
208 this_emulation
->leading_underscore
= this_format
->dfl_leading_underscore
;
210 if (this_emulation
->default_endian
!= 2)
211 target_big_endian
= this_emulation
->default_endian
;
213 if (this_emulation
->fake_label_name
== 0)
215 if (this_emulation
->leading_underscore
)
216 this_emulation
->fake_label_name
= FAKE_LABEL_NAME
;
218 /* What other parameters should we test? */
219 this_emulation
->fake_label_name
= "." FAKE_LABEL_NAME
;
225 print_version_id (void)
233 fprintf (stderr
, _("GNU assembler version %s (%s) using BFD version %s\n"),
234 VERSION
, TARGET_ALIAS
, BFD_VERSION_STRING
);
237 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
238 enum compressed_debug_section_type flag_compress_debug
239 = COMPRESS_DEBUG_GABI_ZLIB
;
243 show_usage (FILE * stream
)
245 fprintf (stream
, _("Usage: %s [option...] [asmfile...]\n"), myname
);
247 fprintf (stream
, _("\
249 -a[sub-option...] turn on listings\n\
250 Sub-options [default hls]:\n\
251 c omit false conditionals\n\
252 d omit debugging directives\n\
253 g include general info\n\
254 h include high-level source\n\
255 l include assembly\n\
256 m include macro expansions\n\
257 n omit forms processing\n\
259 =FILE list to FILE (must be last sub-option)\n"));
261 fprintf (stream
, _("\
262 --alternate initially turn on alternate macro syntax\n"));
263 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
264 fprintf (stream
, _("\
265 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
266 compress DWARF debug sections using zlib [default]\n"));
267 fprintf (stream
, _("\
268 --nocompress-debug-sections\n\
269 don't compress DWARF debug sections\n"));
271 fprintf (stream
, _("\
272 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
273 compress DWARF debug sections using zlib\n"));
274 fprintf (stream
, _("\
275 --nocompress-debug-sections\n\
276 don't compress DWARF debug sections [default]\n"));
278 fprintf (stream
, _("\
279 -D produce assembler debugging messages\n"));
280 fprintf (stream
, _("\
281 --debug-prefix-map OLD=NEW\n\
282 map OLD to NEW in debug information\n"));
283 fprintf (stream
, _("\
284 --defsym SYM=VAL define symbol SYM to given value\n"));
285 #ifdef USE_EMULATIONS
292 for (i
= 0; i
< n_emulations
- 1; i
++)
293 fprintf (stream
, "%s | ", emulations
[i
]->name
);
294 fprintf (stream
, "%s]\n", emulations
[i
]->name
);
296 def_em
= getenv (EMULATION_ENVIRON
);
298 def_em
= DEFAULT_EMULATION
;
299 fprintf (stream
, _("\
300 emulate output (default %s)\n"), def_em
);
303 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
304 fprintf (stream
, _("\
305 --execstack require executable stack for this object\n"));
306 fprintf (stream
, _("\
307 --noexecstack don't require executable stack for this object\n"));
308 fprintf (stream
, _("\
309 --size-check=[error|warning]\n\
310 ELF .size directive check (default --size-check=error)\n"));
311 fprintf (stream
, _("\
312 --elf-stt-common=[no|yes] "));
313 if (DEFAULT_GENERATE_ELF_STT_COMMON
)
314 fprintf (stream
, _("(default: yes)\n"));
316 fprintf (stream
, _("(default: no)\n"));
317 fprintf (stream
, _("\
318 generate ELF common symbols with STT_COMMON type\n"));
319 fprintf (stream
, _("\
320 --sectname-subst enable section name substitution sequences\n"));
322 fprintf (stream
, _("\
323 --generate-missing-build-notes=[no|yes] "));
324 #if DEFAULT_GENERATE_BUILD_NOTES
325 fprintf (stream
, _("(default: yes)\n"));
327 fprintf (stream
, _("(default: no)\n"));
329 fprintf (stream
, _("\
330 generate GNU Build notes if none are present in the input\n"));
333 fprintf (stream
, _("\
334 -f skip whitespace and comment preprocessing\n"));
335 fprintf (stream
, _("\
336 -g --gen-debug generate debugging information\n"));
337 fprintf (stream
, _("\
338 --gstabs generate STABS debugging information\n"));
339 fprintf (stream
, _("\
340 --gstabs+ generate STABS debug info with GNU extensions\n"));
341 fprintf (stream
, _("\
342 --gdwarf-<N> generate DWARF<N> debugging information. 2 <= <N> <= 5\n"));
343 fprintf (stream
, _("\
344 --gdwarf-sections generate per-function section names for DWARF line information\n"));
345 fprintf (stream
, _("\
346 --target-help show target specific options\n"));
347 fprintf (stream
, _("\
348 -I DIR add DIR to search list for .include directives\n"));
349 fprintf (stream
, _("\
350 -J don't warn about signed overflow\n"));
351 fprintf (stream
, _("\
352 -K warn when differences altered for long displacements\n"));
353 fprintf (stream
, _("\
354 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
355 fprintf (stream
, _("\
356 -M,--mri assemble in MRI compatibility mode\n"));
357 fprintf (stream
, _("\
358 --MD FILE write dependency information in FILE (default none)\n"));
359 fprintf (stream
, _("\
361 fprintf (stream
, _("\
362 -no-pad-sections do not pad the end of sections to alignment boundaries\n"));
363 fprintf (stream
, _("\
364 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
365 fprintf (stream
, _("\
366 -R fold data section into text section\n"));
367 fprintf (stream
, _("\
368 --statistics print various measured statistics from execution\n"));
369 fprintf (stream
, _("\
370 --strip-local-absolute strip local absolute symbols\n"));
371 fprintf (stream
, _("\
372 --traditional-format Use same format as native assembler when possible\n"));
373 fprintf (stream
, _("\
374 --version print assembler version number and exit\n"));
375 fprintf (stream
, _("\
376 -W --no-warn suppress warnings\n"));
377 fprintf (stream
, _("\
378 --warn don't suppress warnings\n"));
379 fprintf (stream
, _("\
380 --fatal-warnings treat warnings as errors\n"));
382 fprintf (stream
, _("\
383 --itbl INSTTBL extend instruction set to include instructions\n\
384 matching the specifications defined in file INSTTBL\n"));
386 fprintf (stream
, _("\
388 fprintf (stream
, _("\
390 fprintf (stream
, _("\
391 -Z generate object file even after errors\n"));
392 fprintf (stream
, _("\
393 --listing-lhs-width set the width in words of the output data column of\n\
395 fprintf (stream
, _("\
396 --listing-lhs-width2 set the width in words of the continuation lines\n\
397 of the output data column; ignored if smaller than\n\
398 the width of the first line\n"));
399 fprintf (stream
, _("\
400 --listing-rhs-width set the max width in characters of the lines from\n\
401 the source file\n"));
402 fprintf (stream
, _("\
403 --listing-cont-lines set the maximum number of continuation lines used\n\
404 for the output data column of the listing\n"));
405 fprintf (stream
, _("\
406 @FILE read options from FILE\n"));
408 md_show_usage (stream
);
410 fputc ('\n', stream
);
412 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
413 fprintf (stream
, _("Report bugs to %s\n"), REPORT_BUGS_TO
);
416 /* Since it is easy to do here we interpret the special arg "-"
417 to mean "use stdin" and we set that argv[] pointing to "".
418 After we have munged argv[], the only things left are source file
419 name(s) and ""(s) denoting stdin. These file names are used
420 (perhaps more than once) later.
422 check for new machine-dep cmdline options in
423 md_parse_option definitions in config/tc-*.c. */
426 parse_args (int * pargc
, char *** pargv
)
432 /* Starting the short option string with '-' is for programs that
433 expect options and other ARGV-elements in any order and that care about
434 the ordering of the two. We describe each non-option ARGV-element
435 as if it were the argument of an option with character code 1. */
437 extern const char *md_shortopts
;
438 static const char std_shortopts
[] =
441 #ifndef WORKING_DOT_WORD
442 /* -K is not meaningful if .word is not being hacked. */
445 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
447 /* -v takes an argument on VMS, so we don't make it a generic
453 /* New option for extending instruction set (see also --itbl below). */
458 struct option
*longopts
;
459 extern struct option md_longopts
[];
460 extern size_t md_longopts_size
;
461 /* Codes used for the long options with no short synonyms. */
464 OPTION_HELP
= OPTION_STD_BASE
,
471 OPTION_DEBUG_PREFIX_MAP
,
473 OPTION_LISTING_LHS_WIDTH
,
474 OPTION_LISTING_LHS_WIDTH2
, /* = STD_BASE + 10 */
475 OPTION_LISTING_RHS_WIDTH
,
476 OPTION_LISTING_CONT_LINES
,
484 OPTION_GDWARF_SECTIONS
, /* = STD_BASE + 20 */
485 OPTION_GDWARF_CIE_VERSION
,
486 OPTION_STRIP_LOCAL_ABSOLUTE
,
487 OPTION_TRADITIONAL_FORMAT
,
493 OPTION_ELF_STT_COMMON
,
494 OPTION_ELF_BUILD_NOTES
, /* = STD_BASE + 30 */
495 OPTION_SECTNAME_SUBST
,
498 OPTION_HASH_TABLE_SIZE
,
499 OPTION_REDUCE_MEMORY_OVERHEADS
,
501 OPTION_COMPRESS_DEBUG
,
502 OPTION_NOCOMPRESS_DEBUG
,
503 OPTION_NO_PAD_SECTIONS
,
504 OPTION_MULTIBYTE_HANDLING
/* = STD_BASE + 40 */
505 /* When you add options here, check that they do
506 not collide with OPTION_MD_BASE. See as.h. */
509 static const struct option std_longopts
[] =
511 /* Note: commas are placed at the start of the line rather than
512 the end of the preceding line so that it is simpler to
513 selectively add and remove lines from this list. */
514 {"alternate", no_argument
, NULL
, OPTION_ALTERNATE
}
515 /* The entry for "a" is here to prevent getopt_long_only() from
516 considering that -a is an abbreviation for --alternate. This is
517 necessary because -a=<FILE> is a valid switch but getopt would
518 normally reject it since --alternate does not take an argument. */
519 ,{"a", optional_argument
, NULL
, 'a'}
520 /* Handle -al=<FILE>. */
521 ,{"al", optional_argument
, NULL
, OPTION_AL
}
522 ,{"compress-debug-sections", optional_argument
, NULL
, OPTION_COMPRESS_DEBUG
}
523 ,{"nocompress-debug-sections", no_argument
, NULL
, OPTION_NOCOMPRESS_DEBUG
}
524 ,{"debug-prefix-map", required_argument
, NULL
, OPTION_DEBUG_PREFIX_MAP
}
525 ,{"defsym", required_argument
, NULL
, OPTION_DEFSYM
}
526 ,{"dump-config", no_argument
, NULL
, OPTION_DUMPCONFIG
}
527 ,{"emulation", required_argument
, NULL
, OPTION_EMULATION
}
528 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
529 ,{"execstack", no_argument
, NULL
, OPTION_EXECSTACK
}
530 ,{"noexecstack", no_argument
, NULL
, OPTION_NOEXECSTACK
}
531 ,{"size-check", required_argument
, NULL
, OPTION_SIZE_CHECK
}
532 ,{"elf-stt-common", required_argument
, NULL
, OPTION_ELF_STT_COMMON
}
533 ,{"sectname-subst", no_argument
, NULL
, OPTION_SECTNAME_SUBST
}
534 ,{"generate-missing-build-notes", required_argument
, NULL
, OPTION_ELF_BUILD_NOTES
}
536 ,{"fatal-warnings", no_argument
, NULL
, OPTION_WARN_FATAL
}
537 ,{"gdwarf-2", no_argument
, NULL
, OPTION_GDWARF_2
}
538 ,{"gdwarf-3", no_argument
, NULL
, OPTION_GDWARF_3
}
539 ,{"gdwarf-4", no_argument
, NULL
, OPTION_GDWARF_4
}
540 ,{"gdwarf-5", no_argument
, NULL
, OPTION_GDWARF_5
}
541 /* GCC uses --gdwarf-2 but GAS used to to use --gdwarf2,
542 so we keep it here for backwards compatibility. */
543 ,{"gdwarf2", no_argument
, NULL
, OPTION_GDWARF_2
}
544 ,{"gdwarf-sections", no_argument
, NULL
, OPTION_GDWARF_SECTIONS
}
545 ,{"gdwarf-cie-version", required_argument
, NULL
, OPTION_GDWARF_CIE_VERSION
}
546 ,{"gen-debug", no_argument
, NULL
, 'g'}
547 ,{"gstabs", no_argument
, NULL
, OPTION_GSTABS
}
548 ,{"gstabs+", no_argument
, NULL
, OPTION_GSTABS_PLUS
}
549 ,{"hash-size", required_argument
, NULL
, OPTION_HASH_TABLE_SIZE
}
550 ,{"help", no_argument
, NULL
, OPTION_HELP
}
552 /* New option for extending instruction set (see also -t above).
553 The "-t file" or "--itbl file" option extends the basic set of
554 valid instructions by reading "file", a text file containing a
555 list of instruction formats. The additional opcodes and their
556 formats are added to the built-in set of instructions, and
557 mnemonics for new registers may also be defined. */
558 ,{"itbl", required_argument
, NULL
, 't'}
560 /* getopt allows abbreviations, so we do this to stop it from
561 treating -k as an abbreviation for --keep-locals. Some
562 ports use -k to enable PIC assembly. */
563 ,{"keep-locals", no_argument
, NULL
, 'L'}
564 ,{"keep-locals", no_argument
, NULL
, 'L'}
565 ,{"listing-lhs-width", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH
}
566 ,{"listing-lhs-width2", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH2
}
567 ,{"listing-rhs-width", required_argument
, NULL
, OPTION_LISTING_RHS_WIDTH
}
568 ,{"listing-cont-lines", required_argument
, NULL
, OPTION_LISTING_CONT_LINES
}
569 ,{"MD", required_argument
, NULL
, OPTION_DEPFILE
}
570 ,{"mri", no_argument
, NULL
, 'M'}
571 ,{"nocpp", no_argument
, NULL
, OPTION_NOCPP
}
572 ,{"no-pad-sections", no_argument
, NULL
, OPTION_NO_PAD_SECTIONS
}
573 ,{"no-warn", no_argument
, NULL
, 'W'}
574 ,{"reduce-memory-overheads", no_argument
, NULL
, OPTION_REDUCE_MEMORY_OVERHEADS
}
575 ,{"statistics", no_argument
, NULL
, OPTION_STATISTICS
}
576 ,{"strip-local-absolute", no_argument
, NULL
, OPTION_STRIP_LOCAL_ABSOLUTE
}
577 ,{"version", no_argument
, NULL
, OPTION_VERSION
}
578 ,{"verbose", no_argument
, NULL
, OPTION_VERBOSE
}
579 ,{"target-help", no_argument
, NULL
, OPTION_TARGET_HELP
}
580 ,{"traditional-format", no_argument
, NULL
, OPTION_TRADITIONAL_FORMAT
}
581 ,{"warn", no_argument
, NULL
, OPTION_WARN
}
582 ,{"multibyte-handling", required_argument
, NULL
, OPTION_MULTIBYTE_HANDLING
}
585 /* Construct the option lists from the standard list and the target
586 dependent list. Include space for an extra NULL option and
587 always NULL terminate. */
588 shortopts
= concat (std_shortopts
, md_shortopts
, (char *) NULL
);
589 longopts
= (struct option
*) xmalloc (sizeof (std_longopts
)
590 + md_longopts_size
+ sizeof (struct option
));
591 memcpy (longopts
, std_longopts
, sizeof (std_longopts
));
592 memcpy (((char *) longopts
) + sizeof (std_longopts
), md_longopts
, md_longopts_size
);
593 memset (((char *) longopts
) + sizeof (std_longopts
) + md_longopts_size
,
594 0, sizeof (struct option
));
596 /* Make a local copy of the old argv. */
600 /* Initialize a new argv that contains no options. */
601 new_argv
= XNEWVEC (char *, old_argc
+ 1);
602 new_argv
[0] = old_argv
[0];
604 new_argv
[new_argc
] = NULL
;
608 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
609 indicate a long option. */
611 int optc
= getopt_long_only (old_argc
, old_argv
, shortopts
, longopts
,
620 /* md_parse_option should return 1 if it recognizes optc,
622 if (md_parse_option (optc
, optarg
) != 0)
624 /* `-v' isn't included in the general short_opts list, so check for
625 it explicitly here before deciding we've gotten a bad argument. */
629 /* Telling getopt to treat -v's value as optional can result
630 in it picking up a following filename argument here. The
631 VMS code in md_parse_option can return 0 in that case,
632 but it has no way of pushing the filename argument back. */
633 if (optarg
&& *optarg
)
634 new_argv
[new_argc
++] = optarg
, new_argv
[new_argc
] = NULL
;
645 as_bad (_("unrecognized option -%c%s"), optc
, optarg
? optarg
: "");
651 case 1: /* File name. */
652 if (!strcmp (optarg
, "-"))
653 optarg
= (char *) "";
654 new_argv
[new_argc
++] = optarg
;
655 new_argv
[new_argc
] = NULL
;
658 case OPTION_TARGET_HELP
:
659 md_show_usage (stdout
);
669 case OPTION_NO_PAD_SECTIONS
:
670 do_not_pad_sections_to_alignment
= 1;
673 case OPTION_STATISTICS
:
674 flag_print_statistics
= 1;
677 case OPTION_STRIP_LOCAL_ABSOLUTE
:
678 flag_strip_local_absolute
= 1;
681 case OPTION_TRADITIONAL_FORMAT
:
682 flag_traditional_format
= 1;
685 case OPTION_MULTIBYTE_HANDLING
:
686 if (strcmp (optarg
, "allow") == 0)
687 multibyte_handling
= multibyte_allow
;
688 else if (strcmp (optarg
, "warn") == 0)
689 multibyte_handling
= multibyte_warn
;
690 else if (strcmp (optarg
, "warn-sym-only") == 0)
691 multibyte_handling
= multibyte_warn_syms
;
692 else if (strcmp (optarg
, "warn_sym_only") == 0)
693 multibyte_handling
= multibyte_warn_syms
;
695 as_fatal (_("unexpected argument to --multibyte-input-option: '%s'"), optarg
);
699 /* This output is intended to follow the GNU standards document. */
700 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING
);
701 printf (_("Copyright (C) 2022 Free Software Foundation, Inc.\n"));
703 This program is free software; you may redistribute it under the terms of\n\
704 the GNU General Public License version 3 or later.\n\
705 This program has absolutely no warranty.\n"));
706 #ifdef TARGET_WITH_CPU
707 printf (_("This assembler was configured for a target of `%s' "
708 "and default,\ncpu type `%s'.\n"),
709 TARGET_ALIAS
, TARGET_WITH_CPU
);
711 printf (_("This assembler was configured for a target of `%s'.\n"),
716 case OPTION_EMULATION
:
717 #ifdef USE_EMULATIONS
718 if (strcmp (optarg
, this_emulation
->name
))
719 as_fatal (_("multiple emulation names specified"));
721 as_fatal (_("emulations not handled in this configuration"));
725 case OPTION_DUMPCONFIG
:
726 fprintf (stderr
, _("alias = %s\n"), TARGET_ALIAS
);
727 fprintf (stderr
, _("canonical = %s\n"), TARGET_CANONICAL
);
728 fprintf (stderr
, _("cpu-type = %s\n"), TARGET_CPU
);
729 #ifdef TARGET_OBJ_FORMAT
730 fprintf (stderr
, _("format = %s\n"), TARGET_OBJ_FORMAT
);
733 fprintf (stderr
, _("bfd-target = %s\n"), TARGET_FORMAT
);
737 case OPTION_COMPRESS_DEBUG
:
740 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
741 if (strcasecmp (optarg
, "none") == 0)
742 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
743 else if (strcasecmp (optarg
, "zlib") == 0)
744 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
745 else if (strcasecmp (optarg
, "zlib-gnu") == 0)
746 flag_compress_debug
= COMPRESS_DEBUG_GNU_ZLIB
;
747 else if (strcasecmp (optarg
, "zlib-gabi") == 0)
748 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
750 as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
753 as_fatal (_("--compress-debug-sections=%s is unsupported"),
758 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
761 case OPTION_NOCOMPRESS_DEBUG
:
762 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
765 case OPTION_DEBUG_PREFIX_MAP
:
766 add_debug_prefix_map (optarg
);
773 struct defsym_list
*n
;
775 for (s
= optarg
; *s
!= '\0' && *s
!= '='; s
++)
778 as_fatal (_("bad defsym; format is --defsym name=value"));
780 i
= bfd_scan_vma (s
, (const char **) NULL
, 0);
781 n
= XNEW (struct defsym_list
);
792 /* optarg is the name of the file containing the instruction
793 formats, opcodes, register names, etc. */
794 struct itbl_file_list
*n
;
798 as_warn (_("no file name following -t option"));
802 n
= XNEW (struct itbl_file_list
);
803 n
->next
= itbl_files
;
807 /* Parse the file and add the new instructions to our internal
808 table. If multiple instruction tables are specified, the
809 information from this table gets appended onto the existing
811 itbl_files
->name
= xstrdup (optarg
);
812 if (itbl_parse (itbl_files
->name
) != 0)
813 as_fatal (_("failed to read instruction table %s\n"),
820 start_dependencies (optarg
);
824 /* Some backends, eg Alpha and Mips, use the -g switch for their
825 own purposes. So we check here for an explicit -g and allow
826 the backend to decide if it wants to process it. */
827 if ( old_argv
[optind
- 1][1] == 'g'
828 && md_parse_option (optc
, optarg
))
831 /* We end up here for any -gsomething-not-already-a-long-option.
832 give some useful feedback on not (yet) supported -gdwarfxxx
833 versions/sections/options. */
834 if (startswith (old_argv
[optind
- 1], "-gdwarf"))
835 as_fatal (_("unknown DWARF option %s\n"), old_argv
[optind
- 1]);
836 else if (old_argv
[optind
- 1][1] == 'g' && optarg
!= NULL
)
837 as_fatal (_("unknown option `%s'"), old_argv
[optind
- 1]);
839 if (md_debug_format_selector
)
840 debug_type
= md_debug_format_selector (& use_gnu_debug_info_extensions
);
843 debug_type
= DEBUG_DWARF2
;
847 debug_type
= DEBUG_STABS
;
850 case OPTION_GSTABS_PLUS
:
851 use_gnu_debug_info_extensions
= 1;
854 debug_type
= DEBUG_STABS
;
857 case OPTION_GDWARF_2
:
858 debug_type
= DEBUG_DWARF2
;
862 case OPTION_GDWARF_3
:
863 debug_type
= DEBUG_DWARF2
;
867 case OPTION_GDWARF_4
:
868 debug_type
= DEBUG_DWARF2
;
872 case OPTION_GDWARF_5
:
873 debug_type
= DEBUG_DWARF2
;
877 case OPTION_GDWARF_SECTIONS
:
878 flag_dwarf_sections
= true;
881 case OPTION_GDWARF_CIE_VERSION
:
882 flag_dwarf_cie_version
= atoi (optarg
);
883 /* The available CIE versions are 1 (DWARF 2), 3 (DWARF 3), and 4
885 if (flag_dwarf_cie_version
< 1
886 || flag_dwarf_cie_version
== 2
887 || flag_dwarf_cie_version
> 4)
888 as_fatal (_("Invalid --gdwarf-cie-version `%s'"), optarg
);
889 switch (flag_dwarf_cie_version
)
907 flag_signed_overflow_ok
= 1;
910 #ifndef WORKING_DOT_WORD
912 flag_warn_displacement
= 1;
916 flag_keep_locals
= 1;
919 case OPTION_LISTING_LHS_WIDTH
:
920 listing_lhs_width
= atoi (optarg
);
921 if (listing_lhs_width_second
< listing_lhs_width
)
922 listing_lhs_width_second
= listing_lhs_width
;
924 case OPTION_LISTING_LHS_WIDTH2
:
926 int tmp
= atoi (optarg
);
928 if (tmp
> listing_lhs_width
)
929 listing_lhs_width_second
= tmp
;
932 case OPTION_LISTING_RHS_WIDTH
:
933 listing_rhs_width
= atoi (optarg
);
935 case OPTION_LISTING_CONT_LINES
:
936 listing_lhs_cont_lines
= atoi (optarg
);
947 flag_readonly_data_in_text
= 1;
951 flag_no_warnings
= 1;
955 flag_no_warnings
= 0;
956 flag_fatal_warnings
= 0;
959 case OPTION_WARN_FATAL
:
960 flag_no_warnings
= 0;
961 flag_fatal_warnings
= 1;
964 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
965 case OPTION_EXECSTACK
:
967 flag_noexecstack
= 0;
970 case OPTION_NOEXECSTACK
:
971 flag_noexecstack
= 1;
975 case OPTION_SIZE_CHECK
:
976 if (strcasecmp (optarg
, "error") == 0)
977 flag_allow_nonconst_size
= false;
978 else if (strcasecmp (optarg
, "warning") == 0)
979 flag_allow_nonconst_size
= true;
981 as_fatal (_("Invalid --size-check= option: `%s'"), optarg
);
984 case OPTION_ELF_STT_COMMON
:
985 if (strcasecmp (optarg
, "no") == 0)
986 flag_use_elf_stt_common
= 0;
987 else if (strcasecmp (optarg
, "yes") == 0)
988 flag_use_elf_stt_common
= 1;
990 as_fatal (_("Invalid --elf-stt-common= option: `%s'"),
994 case OPTION_SECTNAME_SUBST
:
995 flag_sectname_subst
= 1;
998 case OPTION_ELF_BUILD_NOTES
:
999 if (strcasecmp (optarg
, "no") == 0)
1000 flag_generate_build_notes
= false;
1001 else if (strcasecmp (optarg
, "yes") == 0)
1002 flag_generate_build_notes
= true;
1004 as_fatal (_("Invalid --generate-missing-build-notes option: `%s'"),
1008 #endif /* OBJ_ELF */
1011 flag_always_generate_output
= 1;
1015 listing
|= LISTING_LISTING
;
1017 listing_filename
= xstrdup (optarg
);
1020 case OPTION_ALTERNATE
:
1021 optarg
= old_argv
[optind
- 1];
1022 while (* optarg
== '-')
1025 if (strcmp (optarg
, "alternate") == 0)
1027 flag_macro_alternate
= 1;
1036 if (optarg
!= old_argv
[optind
] && optarg
[-1] == '=')
1039 if (md_parse_option (optc
, optarg
) != 0)
1047 listing
|= LISTING_NOCOND
;
1050 listing
|= LISTING_NODEBUG
;
1053 listing
|= LISTING_GENERAL
;
1056 listing
|= LISTING_HLL
;
1059 listing
|= LISTING_LISTING
;
1062 listing
|= LISTING_MACEXP
;
1065 listing
|= LISTING_NOFORM
;
1068 listing
|= LISTING_SYMBOLS
;
1071 listing_filename
= xstrdup (optarg
+ 1);
1072 optarg
+= strlen (listing_filename
);
1075 as_fatal (_("invalid listing option `%c'"), *optarg
);
1082 listing
= LISTING_DEFAULT
;
1086 /* DEBUG is implemented: it debugs different
1087 things from other people's assemblers. */
1092 flag_no_comments
= 1;
1096 { /* Include file directory. */
1097 char *temp
= xstrdup (optarg
);
1099 add_include_dir (temp
);
1104 out_file_name
= xstrdup (optarg
);
1111 /* -X means treat warnings as errors. */
1114 case OPTION_REDUCE_MEMORY_OVERHEADS
:
1117 case OPTION_HASH_TABLE_SIZE
:
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
);
1155 /* The interface between the macro code and gas expression handling. */
1158 macro_expr (const char *emsg
, size_t idx
, sb
*in
, offsetT
*val
)
1164 temp_ilp (in
->ptr
+ idx
);
1165 expression_and_evaluate (&ex
);
1166 idx
= input_line_pointer
- in
->ptr
;
1169 if (ex
.X_op
!= O_constant
)
1170 as_bad ("%s", emsg
);
1172 *val
= ex
.X_add_number
;
1177 /* Here to attempt 1 pass over each input file.
1178 We scan argv[*] looking for filenames or exactly "" which is
1179 shorthand for stdin. Any argv that is NULL is not a file-name.
1180 We set need_pass_2 TRUE if, after this, we still have unresolved
1181 expressions of the form (unknown value)+-(unknown value).
1183 Note the un*x semantics: there is only 1 logical input file, but it
1184 may be a catenation of many 'physical' input files. */
1187 perform_an_assembly_pass (int argc
, char ** argv
)
1191 flagword applicable
;
1197 /* Create the standard sections, and those the assembler uses
1199 text_section
= subseg_new (TEXT_SECTION_NAME
, 0);
1200 data_section
= subseg_new (DATA_SECTION_NAME
, 0);
1201 bss_section
= subseg_new (BSS_SECTION_NAME
, 0);
1202 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1203 to have relocs, otherwise we don't find out in time. */
1204 applicable
= bfd_applicable_section_flags (stdoutput
);
1205 bfd_set_section_flags (text_section
,
1206 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1207 | SEC_CODE
| SEC_READONLY
));
1208 bfd_set_section_flags (data_section
,
1209 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1211 bfd_set_section_flags (bss_section
, applicable
& SEC_ALLOC
);
1212 seg_info (bss_section
)->bss
= 1;
1214 subseg_new (BFD_ABS_SECTION_NAME
, 0);
1215 subseg_new (BFD_UND_SECTION_NAME
, 0);
1216 reg_section
= subseg_new ("*GAS `reg' section*", 0);
1217 expr_section
= subseg_new ("*GAS `expr' section*", 0);
1220 subseg_set (text_section
, 0);
1223 /* This may add symbol table entries, which requires having an open BFD,
1224 and sections already created. */
1241 { /* Is it a file-name argument? */
1244 /* argv->"" if stdin desired, else->filename. */
1245 read_a_source_file (*argv
);
1247 argv
++; /* Completed that argv. */
1250 read_a_source_file ("");
1255 main (int argc
, char ** argv
)
1257 char ** argv_orig
= argv
;
1262 start_time
= get_run_time ();
1265 #ifdef HAVE_LC_MESSAGES
1266 setlocale (LC_MESSAGES
, "");
1268 setlocale (LC_CTYPE
, "");
1269 bindtextdomain (PACKAGE
, LOCALEDIR
);
1270 textdomain (PACKAGE
);
1275 #ifdef HOST_SPECIAL_INIT
1276 HOST_SPECIAL_INIT (argc
, argv
);
1280 xmalloc_set_program_name (myname
);
1282 expandargv (&argc
, &argv
);
1284 START_PROGRESS (myname
, 0);
1286 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1287 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1290 out_file_name
= OBJ_DEFAULT_OUTPUT_FILE_NAME
;
1293 if (bfd_init () != BFD_INIT_MAGIC
)
1294 as_fatal (_("libbfd ABI mismatch"));
1295 bfd_set_error_program_name (myname
);
1297 #ifdef USE_EMULATIONS
1298 select_emulation_mode (argc
, argv
);
1302 /* Call parse_args before any of the init/begin functions
1303 so that switches like --hash-size can be honored. */
1304 parse_args (&argc
, &argv
);
1306 if (argc
> 1 && stat (out_file_name
, &sob
) == 0)
1310 for (i
= 1; i
< argc
; ++i
)
1314 /* Check that the input file and output file are different. */
1315 if (stat (argv
[i
], &sib
) == 0
1316 && sib
.st_ino
== sob
.st_ino
1317 /* POSIX emulating systems may support stat() but if the
1318 underlying file system does not support a file serial number
1319 of some kind then they will return 0 for the inode. So
1320 two files with an inode of 0 may not actually be the same.
1321 On real POSIX systems no ordinary file will ever have an
1324 /* Different files may have the same inode number if they
1325 reside on different devices, so check the st_dev field as
1327 && sib
.st_dev
== sob
.st_dev
1328 /* PR 25572: Only check regular files. Devices, sockets and so
1329 on might actually work as both input and output. Plus there
1330 is a use case for using /dev/null as both input and output
1331 when checking for command line option support in a script:
1332 as --foo /dev/null -o /dev/null; if $? then ... */
1333 && S_ISREG (sib
.st_mode
))
1335 const char *saved_out_file_name
= out_file_name
;
1337 /* Don't let as_fatal remove the output file! */
1338 out_file_name
= NULL
;
1339 as_fatal (_("The input '%s' and output '%s' files are the same"),
1340 argv
[i
], saved_out_file_name
);
1349 input_scrub_begin ();
1352 /* It has to be called after dump_statistics (). */
1353 xatexit (output_file_close
);
1355 if (flag_print_statistics
)
1356 xatexit (dump_statistics
);
1360 macro_strip_at
= flag_mri
;
1363 macro_init (flag_macro_alternate
, flag_mri
, macro_strip_at
, macro_expr
);
1367 output_file_create (out_file_name
);
1368 gas_assert (stdoutput
!= 0);
1372 #ifdef tc_init_after_args
1373 tc_init_after_args ();
1380 local_symbol_make (".gasversion.", absolute_section
,
1381 &predefined_address_frag
, BFD_VERSION
/ 10000UL);
1383 /* Now that we have fully initialized, and have created the output
1384 file, define any symbols requested by --defsym command line
1386 while (defsyms
!= NULL
)
1389 struct defsym_list
*next
;
1391 sym
= symbol_new (defsyms
->name
, absolute_section
,
1392 &zero_address_frag
, defsyms
->value
);
1393 /* Make symbols defined on the command line volatile, so that they
1394 can be redefined inside a source file. This makes this assembler's
1395 behaviour compatible with earlier versions, but it may not be
1396 completely intuitive. */
1397 S_SET_VOLATILE (sym
);
1398 symbol_table_insert (sym
);
1399 next
= defsyms
->next
;
1407 perform_an_assembly_pass (argc
, argv
);
1409 cond_finish_check (-1);
1415 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1416 if ((flag_execstack
|| flag_noexecstack
)
1417 && OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
1421 gnustack
= subseg_new (".note.GNU-stack", 0);
1422 bfd_set_section_flags (gnustack
,
1423 SEC_READONLY
| (flag_execstack
? SEC_CODE
: 0));
1428 /* If we've been collecting dwarf2 .debug_line info, either for
1429 assembly debugging or on behalf of the compiler, emit it now. */
1432 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1433 directives from the user or by the backend, emit it now. */
1437 if (seen_at_least_1_file ())
1439 int n_warns
, n_errs
;
1443 write_object_file ();
1445 n_warns
= had_warnings ();
1446 n_errs
= had_errors ();
1449 ngettext ("%d warning", "%d warnings", n_warns
), n_warns
);
1451 ngettext ("%d error", "%d errors", n_errs
), n_errs
);
1452 if (flag_fatal_warnings
&& n_warns
!= 0)
1455 as_bad (_("%s, treating warnings as errors"), warn_msg
);
1461 else if (flag_always_generate_output
)
1463 /* The -Z flag indicates that an object file should be generated,
1464 regardless of warnings and errors. */
1466 fprintf (stderr
, _("%s, %s, generating bad object file\n"),
1474 listing_print (listing_filename
, argv_orig
);
1479 END_PROGRESS (myname
);
1481 /* Use xexit instead of return, because under VMS environments they
1482 may not place the same interpretation on the value given. */
1483 if (had_errors () != 0)
1484 xexit (EXIT_FAILURE
);
1486 /* Only generate dependency file if assembler was successful. */
1487 print_dependencies ();
1489 xexit (EXIT_SUCCESS
);