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
, /* = STD_BASE + 10 */
478 OPTION_LISTING_RHS_WIDTH
,
479 OPTION_LISTING_CONT_LINES
,
487 OPTION_GDWARF_SECTIONS
, /* = STD_BASE + 20 */
488 OPTION_GDWARF_CIE_VERSION
,
489 OPTION_STRIP_LOCAL_ABSOLUTE
,
490 OPTION_TRADITIONAL_FORMAT
,
496 OPTION_ELF_STT_COMMON
,
497 OPTION_ELF_BUILD_NOTES
, /* = STD_BASE + 30 */
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
,
507 OPTION_MULTIBYTE_HANDLING
/* = STD_BASE + 40 */
508 /* When you add options here, check that they do
509 not collide with OPTION_MD_BASE. See as.h. */
512 static const struct option std_longopts
[] =
514 /* Note: commas are placed at the start of the line rather than
515 the end of the preceding line so that it is simpler to
516 selectively add and remove lines from this list. */
517 {"alternate", no_argument
, NULL
, OPTION_ALTERNATE
}
518 /* The entry for "a" is here to prevent getopt_long_only() from
519 considering that -a is an abbreviation for --alternate. This is
520 necessary because -a=<FILE> is a valid switch but getopt would
521 normally reject it since --alternate does not take an argument. */
522 ,{"a", optional_argument
, NULL
, 'a'}
523 /* Handle -al=<FILE>. */
524 ,{"al", optional_argument
, NULL
, OPTION_AL
}
525 ,{"compress-debug-sections", optional_argument
, NULL
, OPTION_COMPRESS_DEBUG
}
526 ,{"nocompress-debug-sections", no_argument
, NULL
, OPTION_NOCOMPRESS_DEBUG
}
527 ,{"debug-prefix-map", required_argument
, NULL
, OPTION_DEBUG_PREFIX_MAP
}
528 ,{"defsym", required_argument
, NULL
, OPTION_DEFSYM
}
529 ,{"dump-config", no_argument
, NULL
, OPTION_DUMPCONFIG
}
530 ,{"emulation", required_argument
, NULL
, OPTION_EMULATION
}
531 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
532 ,{"execstack", no_argument
, NULL
, OPTION_EXECSTACK
}
533 ,{"noexecstack", no_argument
, NULL
, OPTION_NOEXECSTACK
}
534 ,{"size-check", required_argument
, NULL
, OPTION_SIZE_CHECK
}
535 ,{"elf-stt-common", required_argument
, NULL
, OPTION_ELF_STT_COMMON
}
536 ,{"sectname-subst", no_argument
, NULL
, OPTION_SECTNAME_SUBST
}
537 ,{"generate-missing-build-notes", required_argument
, NULL
, OPTION_ELF_BUILD_NOTES
}
539 ,{"fatal-warnings", no_argument
, NULL
, OPTION_WARN_FATAL
}
540 ,{"gdwarf-2", no_argument
, NULL
, OPTION_GDWARF_2
}
541 ,{"gdwarf-3", no_argument
, NULL
, OPTION_GDWARF_3
}
542 ,{"gdwarf-4", no_argument
, NULL
, OPTION_GDWARF_4
}
543 ,{"gdwarf-5", no_argument
, NULL
, OPTION_GDWARF_5
}
544 /* GCC uses --gdwarf-2 but GAS used to to use --gdwarf2,
545 so we keep it here for backwards compatibility. */
546 ,{"gdwarf2", no_argument
, NULL
, OPTION_GDWARF_2
}
547 ,{"gdwarf-sections", no_argument
, NULL
, OPTION_GDWARF_SECTIONS
}
548 ,{"gdwarf-cie-version", required_argument
, NULL
, OPTION_GDWARF_CIE_VERSION
}
549 ,{"gen-debug", no_argument
, NULL
, 'g'}
550 ,{"gstabs", no_argument
, NULL
, OPTION_GSTABS
}
551 ,{"gstabs+", no_argument
, NULL
, OPTION_GSTABS_PLUS
}
552 ,{"hash-size", required_argument
, NULL
, OPTION_HASH_TABLE_SIZE
}
553 ,{"help", no_argument
, NULL
, OPTION_HELP
}
555 /* New option for extending instruction set (see also -t above).
556 The "-t file" or "--itbl file" option extends the basic set of
557 valid instructions by reading "file", a text file containing a
558 list of instruction formats. The additional opcodes and their
559 formats are added to the built-in set of instructions, and
560 mnemonics for new registers may also be defined. */
561 ,{"itbl", required_argument
, NULL
, 't'}
563 /* getopt allows abbreviations, so we do this to stop it from
564 treating -k as an abbreviation for --keep-locals. Some
565 ports use -k to enable PIC assembly. */
566 ,{"keep-locals", no_argument
, NULL
, 'L'}
567 ,{"keep-locals", no_argument
, NULL
, 'L'}
568 ,{"listing-lhs-width", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH
}
569 ,{"listing-lhs-width2", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH2
}
570 ,{"listing-rhs-width", required_argument
, NULL
, OPTION_LISTING_RHS_WIDTH
}
571 ,{"listing-cont-lines", required_argument
, NULL
, OPTION_LISTING_CONT_LINES
}
572 ,{"MD", required_argument
, NULL
, OPTION_DEPFILE
}
573 ,{"mri", no_argument
, NULL
, 'M'}
574 ,{"nocpp", no_argument
, NULL
, OPTION_NOCPP
}
575 ,{"no-pad-sections", no_argument
, NULL
, OPTION_NO_PAD_SECTIONS
}
576 ,{"no-warn", no_argument
, NULL
, 'W'}
577 ,{"reduce-memory-overheads", no_argument
, NULL
, OPTION_REDUCE_MEMORY_OVERHEADS
}
578 ,{"statistics", no_argument
, NULL
, OPTION_STATISTICS
}
579 ,{"strip-local-absolute", no_argument
, NULL
, OPTION_STRIP_LOCAL_ABSOLUTE
}
580 ,{"version", no_argument
, NULL
, OPTION_VERSION
}
581 ,{"verbose", no_argument
, NULL
, OPTION_VERBOSE
}
582 ,{"target-help", no_argument
, NULL
, OPTION_TARGET_HELP
}
583 ,{"traditional-format", no_argument
, NULL
, OPTION_TRADITIONAL_FORMAT
}
584 ,{"warn", no_argument
, NULL
, OPTION_WARN
}
585 ,{"multibyte-handling", required_argument
, NULL
, OPTION_MULTIBYTE_HANDLING
}
588 /* Construct the option lists from the standard list and the target
589 dependent list. Include space for an extra NULL option and
590 always NULL terminate. */
591 shortopts
= concat (std_shortopts
, md_shortopts
, (char *) NULL
);
592 longopts
= (struct option
*) xmalloc (sizeof (std_longopts
)
593 + md_longopts_size
+ sizeof (struct option
));
594 memcpy (longopts
, std_longopts
, sizeof (std_longopts
));
595 memcpy (((char *) longopts
) + sizeof (std_longopts
), md_longopts
, md_longopts_size
);
596 memset (((char *) longopts
) + sizeof (std_longopts
) + md_longopts_size
,
597 0, sizeof (struct option
));
599 /* Make a local copy of the old argv. */
603 /* Initialize a new argv that contains no options. */
604 new_argv
= XNEWVEC (char *, old_argc
+ 1);
605 new_argv
[0] = old_argv
[0];
607 new_argv
[new_argc
] = NULL
;
611 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
612 indicate a long option. */
614 int optc
= getopt_long_only (old_argc
, old_argv
, shortopts
, longopts
,
623 /* md_parse_option should return 1 if it recognizes optc,
625 if (md_parse_option (optc
, optarg
) != 0)
627 /* `-v' isn't included in the general short_opts list, so check for
628 it explicitly here before deciding we've gotten a bad argument. */
632 /* Telling getopt to treat -v's value as optional can result
633 in it picking up a following filename argument here. The
634 VMS code in md_parse_option can return 0 in that case,
635 but it has no way of pushing the filename argument back. */
636 if (optarg
&& *optarg
)
637 new_argv
[new_argc
++] = optarg
, new_argv
[new_argc
] = NULL
;
648 as_bad (_("unrecognized option -%c%s"), optc
, optarg
? optarg
: "");
654 case 1: /* File name. */
655 if (!strcmp (optarg
, "-"))
656 optarg
= (char *) "";
657 new_argv
[new_argc
++] = optarg
;
658 new_argv
[new_argc
] = NULL
;
661 case OPTION_TARGET_HELP
:
662 md_show_usage (stdout
);
672 case OPTION_NO_PAD_SECTIONS
:
673 do_not_pad_sections_to_alignment
= 1;
676 case OPTION_STATISTICS
:
677 flag_print_statistics
= 1;
680 case OPTION_STRIP_LOCAL_ABSOLUTE
:
681 flag_strip_local_absolute
= 1;
684 case OPTION_TRADITIONAL_FORMAT
:
685 flag_traditional_format
= 1;
688 case OPTION_MULTIBYTE_HANDLING
:
689 if (strcmp (optarg
, "allow") == 0)
690 multibyte_handling
= multibyte_allow
;
691 else if (strcmp (optarg
, "warn") == 0)
692 multibyte_handling
= multibyte_warn
;
693 else if (strcmp (optarg
, "warn-sym-only") == 0)
694 multibyte_handling
= multibyte_warn_syms
;
695 else if (strcmp (optarg
, "warn_sym_only") == 0)
696 multibyte_handling
= multibyte_warn_syms
;
698 as_fatal (_("unexpected argument to --multibyte-input-option: '%s'"), optarg
);
702 /* This output is intended to follow the GNU standards document. */
703 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING
);
704 printf (_("Copyright (C) 2021 Free Software Foundation, Inc.\n"));
706 This program is free software; you may redistribute it under the terms of\n\
707 the GNU General Public License version 3 or later.\n\
708 This program has absolutely no warranty.\n"));
709 #ifdef TARGET_WITH_CPU
710 printf (_("This assembler was configured for a target of `%s' "
711 "and default,\ncpu type `%s'.\n"),
712 TARGET_ALIAS
, TARGET_WITH_CPU
);
714 printf (_("This assembler was configured for a target of `%s'.\n"),
719 case OPTION_EMULATION
:
720 #ifdef USE_EMULATIONS
721 if (strcmp (optarg
, this_emulation
->name
))
722 as_fatal (_("multiple emulation names specified"));
724 as_fatal (_("emulations not handled in this configuration"));
728 case OPTION_DUMPCONFIG
:
729 fprintf (stderr
, _("alias = %s\n"), TARGET_ALIAS
);
730 fprintf (stderr
, _("canonical = %s\n"), TARGET_CANONICAL
);
731 fprintf (stderr
, _("cpu-type = %s\n"), TARGET_CPU
);
732 #ifdef TARGET_OBJ_FORMAT
733 fprintf (stderr
, _("format = %s\n"), TARGET_OBJ_FORMAT
);
736 fprintf (stderr
, _("bfd-target = %s\n"), TARGET_FORMAT
);
740 case OPTION_COMPRESS_DEBUG
:
743 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
744 if (strcasecmp (optarg
, "none") == 0)
745 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
746 else if (strcasecmp (optarg
, "zlib") == 0)
747 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
748 else if (strcasecmp (optarg
, "zlib-gnu") == 0)
749 flag_compress_debug
= COMPRESS_DEBUG_GNU_ZLIB
;
750 else if (strcasecmp (optarg
, "zlib-gabi") == 0)
751 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
753 as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
756 as_fatal (_("--compress-debug-sections=%s is unsupported"),
761 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
764 case OPTION_NOCOMPRESS_DEBUG
:
765 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
768 case OPTION_DEBUG_PREFIX_MAP
:
769 add_debug_prefix_map (optarg
);
776 struct defsym_list
*n
;
778 for (s
= optarg
; *s
!= '\0' && *s
!= '='; s
++)
781 as_fatal (_("bad defsym; format is --defsym name=value"));
783 i
= bfd_scan_vma (s
, (const char **) NULL
, 0);
784 n
= XNEW (struct defsym_list
);
795 /* optarg is the name of the file containing the instruction
796 formats, opcodes, register names, etc. */
797 struct itbl_file_list
*n
;
801 as_warn (_("no file name following -t option"));
805 n
= XNEW (struct itbl_file_list
);
806 n
->next
= itbl_files
;
810 /* Parse the file and add the new instructions to our internal
811 table. If multiple instruction tables are specified, the
812 information from this table gets appended onto the existing
814 itbl_files
->name
= xstrdup (optarg
);
815 if (itbl_parse (itbl_files
->name
) != 0)
816 as_fatal (_("failed to read instruction table %s\n"),
823 start_dependencies (optarg
);
827 /* Some backends, eg Alpha and Mips, use the -g switch for their
828 own purposes. So we check here for an explicit -g and allow
829 the backend to decide if it wants to process it. */
830 if ( old_argv
[optind
- 1][1] == 'g'
831 && md_parse_option (optc
, optarg
))
834 /* We end up here for any -gsomething-not-already-a-long-option.
835 give some useful feedback on not (yet) supported -gdwarfxxx
836 versions/sections/options. */
837 if (startswith (old_argv
[optind
- 1], "-gdwarf"))
838 as_fatal (_("unknown DWARF option %s\n"), old_argv
[optind
- 1]);
840 if (md_debug_format_selector
)
841 debug_type
= md_debug_format_selector (& use_gnu_debug_info_extensions
);
844 debug_type
= DEBUG_DWARF2
;
848 debug_type
= DEBUG_STABS
;
851 case OPTION_GSTABS_PLUS
:
852 use_gnu_debug_info_extensions
= 1;
855 debug_type
= DEBUG_STABS
;
858 case OPTION_GDWARF_2
:
859 debug_type
= DEBUG_DWARF2
;
863 case OPTION_GDWARF_3
:
864 debug_type
= DEBUG_DWARF2
;
868 case OPTION_GDWARF_4
:
869 debug_type
= DEBUG_DWARF2
;
873 case OPTION_GDWARF_5
:
874 debug_type
= DEBUG_DWARF2
;
878 case OPTION_GDWARF_SECTIONS
:
879 flag_dwarf_sections
= true;
882 case OPTION_GDWARF_CIE_VERSION
:
883 flag_dwarf_cie_version
= atoi (optarg
);
884 /* The available CIE versions are 1 (DWARF 2), 3 (DWARF 3), and 4
886 if (flag_dwarf_cie_version
< 1
887 || flag_dwarf_cie_version
== 2
888 || flag_dwarf_cie_version
> 4)
889 as_fatal (_("Invalid --gdwarf-cie-version `%s'"), optarg
);
890 switch (flag_dwarf_cie_version
)
908 flag_signed_overflow_ok
= 1;
911 #ifndef WORKING_DOT_WORD
913 flag_warn_displacement
= 1;
917 flag_keep_locals
= 1;
920 case OPTION_LISTING_LHS_WIDTH
:
921 listing_lhs_width
= atoi (optarg
);
922 if (listing_lhs_width_second
< listing_lhs_width
)
923 listing_lhs_width_second
= listing_lhs_width
;
925 case OPTION_LISTING_LHS_WIDTH2
:
927 int tmp
= atoi (optarg
);
929 if (tmp
> listing_lhs_width
)
930 listing_lhs_width_second
= tmp
;
933 case OPTION_LISTING_RHS_WIDTH
:
934 listing_rhs_width
= atoi (optarg
);
936 case OPTION_LISTING_CONT_LINES
:
937 listing_lhs_cont_lines
= atoi (optarg
);
948 flag_readonly_data_in_text
= 1;
952 flag_no_warnings
= 1;
956 flag_no_warnings
= 0;
957 flag_fatal_warnings
= 0;
960 case OPTION_WARN_FATAL
:
961 flag_no_warnings
= 0;
962 flag_fatal_warnings
= 1;
965 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
966 case OPTION_EXECSTACK
:
968 flag_noexecstack
= 0;
971 case OPTION_NOEXECSTACK
:
972 flag_noexecstack
= 1;
976 case OPTION_SIZE_CHECK
:
977 if (strcasecmp (optarg
, "error") == 0)
978 flag_allow_nonconst_size
= false;
979 else if (strcasecmp (optarg
, "warning") == 0)
980 flag_allow_nonconst_size
= true;
982 as_fatal (_("Invalid --size-check= option: `%s'"), optarg
);
985 case OPTION_ELF_STT_COMMON
:
986 if (strcasecmp (optarg
, "no") == 0)
987 flag_use_elf_stt_common
= 0;
988 else if (strcasecmp (optarg
, "yes") == 0)
989 flag_use_elf_stt_common
= 1;
991 as_fatal (_("Invalid --elf-stt-common= option: `%s'"),
995 case OPTION_SECTNAME_SUBST
:
996 flag_sectname_subst
= 1;
999 case OPTION_ELF_BUILD_NOTES
:
1000 if (strcasecmp (optarg
, "no") == 0)
1001 flag_generate_build_notes
= false;
1002 else if (strcasecmp (optarg
, "yes") == 0)
1003 flag_generate_build_notes
= true;
1005 as_fatal (_("Invalid --generate-missing-build-notes option: `%s'"),
1009 #endif /* OBJ_ELF */
1012 flag_always_generate_output
= 1;
1016 listing
|= LISTING_LISTING
;
1018 listing_filename
= xstrdup (optarg
);
1021 case OPTION_ALTERNATE
:
1022 optarg
= old_argv
[optind
- 1];
1023 while (* optarg
== '-')
1026 if (strcmp (optarg
, "alternate") == 0)
1028 flag_macro_alternate
= 1;
1037 if (optarg
!= old_argv
[optind
] && optarg
[-1] == '=')
1040 if (md_parse_option (optc
, optarg
) != 0)
1048 listing
|= LISTING_NOCOND
;
1051 listing
|= LISTING_NODEBUG
;
1054 listing
|= LISTING_GENERAL
;
1057 listing
|= LISTING_HLL
;
1060 listing
|= LISTING_LISTING
;
1063 listing
|= LISTING_MACEXP
;
1066 listing
|= LISTING_NOFORM
;
1069 listing
|= LISTING_SYMBOLS
;
1072 listing_filename
= xstrdup (optarg
+ 1);
1073 optarg
+= strlen (listing_filename
);
1076 as_fatal (_("invalid listing option `%c'"), *optarg
);
1083 listing
= LISTING_DEFAULT
;
1087 /* DEBUG is implemented: it debugs different
1088 things from other people's assemblers. */
1093 flag_no_comments
= 1;
1097 { /* Include file directory. */
1098 char *temp
= xstrdup (optarg
);
1100 add_include_dir (temp
);
1105 out_file_name
= xstrdup (optarg
);
1112 /* -X means treat warnings as errors. */
1115 case OPTION_REDUCE_MEMORY_OVERHEADS
:
1118 case OPTION_HASH_TABLE_SIZE
:
1129 #ifdef md_after_parse_args
1130 md_after_parse_args ();
1135 dump_statistics (void)
1137 long run_time
= get_run_time () - start_time
;
1139 fprintf (stderr
, _("%s: total time in assembly: %ld.%06ld\n"),
1140 myname
, run_time
/ 1000000, run_time
% 1000000);
1142 subsegs_print_statistics (stderr
);
1143 write_print_statistics (stderr
);
1144 symbol_print_statistics (stderr
);
1145 read_print_statistics (stderr
);
1147 #ifdef tc_print_statistics
1148 tc_print_statistics (stderr
);
1151 #ifdef obj_print_statistics
1152 obj_print_statistics (stderr
);
1157 close_output_file (void)
1159 output_file_close (out_file_name
);
1161 unlink_if_ordinary (out_file_name
);
1164 /* The interface between the macro code and gas expression handling. */
1167 macro_expr (const char *emsg
, size_t idx
, sb
*in
, offsetT
*val
)
1173 temp_ilp (in
->ptr
+ idx
);
1174 expression_and_evaluate (&ex
);
1175 idx
= input_line_pointer
- in
->ptr
;
1178 if (ex
.X_op
!= O_constant
)
1179 as_bad ("%s", emsg
);
1181 *val
= ex
.X_add_number
;
1186 /* Here to attempt 1 pass over each input file.
1187 We scan argv[*] looking for filenames or exactly "" which is
1188 shorthand for stdin. Any argv that is NULL is not a file-name.
1189 We set need_pass_2 TRUE if, after this, we still have unresolved
1190 expressions of the form (unknown value)+-(unknown value).
1192 Note the un*x semantics: there is only 1 logical input file, but it
1193 may be a catenation of many 'physical' input files. */
1196 perform_an_assembly_pass (int argc
, char ** argv
)
1200 flagword applicable
;
1206 /* Create the standard sections, and those the assembler uses
1208 text_section
= subseg_new (TEXT_SECTION_NAME
, 0);
1209 data_section
= subseg_new (DATA_SECTION_NAME
, 0);
1210 bss_section
= subseg_new (BSS_SECTION_NAME
, 0);
1211 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1212 to have relocs, otherwise we don't find out in time. */
1213 applicable
= bfd_applicable_section_flags (stdoutput
);
1214 bfd_set_section_flags (text_section
,
1215 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1216 | SEC_CODE
| SEC_READONLY
));
1217 bfd_set_section_flags (data_section
,
1218 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1220 bfd_set_section_flags (bss_section
, applicable
& SEC_ALLOC
);
1221 seg_info (bss_section
)->bss
= 1;
1223 subseg_new (BFD_ABS_SECTION_NAME
, 0);
1224 subseg_new (BFD_UND_SECTION_NAME
, 0);
1225 reg_section
= subseg_new ("*GAS `reg' section*", 0);
1226 expr_section
= subseg_new ("*GAS `expr' section*", 0);
1229 subseg_set (text_section
, 0);
1232 /* This may add symbol table entries, which requires having an open BFD,
1233 and sections already created. */
1250 { /* Is it a file-name argument? */
1253 /* argv->"" if stdin desired, else->filename. */
1254 read_a_source_file (*argv
);
1256 argv
++; /* Completed that argv. */
1259 read_a_source_file ("");
1264 main (int argc
, char ** argv
)
1266 char ** argv_orig
= argv
;
1271 start_time
= get_run_time ();
1274 #ifdef HAVE_LC_MESSAGES
1275 setlocale (LC_MESSAGES
, "");
1277 setlocale (LC_CTYPE
, "");
1278 bindtextdomain (PACKAGE
, LOCALEDIR
);
1279 textdomain (PACKAGE
);
1284 #ifdef HOST_SPECIAL_INIT
1285 HOST_SPECIAL_INIT (argc
, argv
);
1289 xmalloc_set_program_name (myname
);
1291 expandargv (&argc
, &argv
);
1293 START_PROGRESS (myname
, 0);
1295 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1296 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1299 out_file_name
= OBJ_DEFAULT_OUTPUT_FILE_NAME
;
1302 if (bfd_init () != BFD_INIT_MAGIC
)
1303 as_fatal (_("libbfd ABI mismatch"));
1304 bfd_set_error_program_name (myname
);
1306 #ifdef USE_EMULATIONS
1307 select_emulation_mode (argc
, argv
);
1311 /* Call parse_args before any of the init/begin functions
1312 so that switches like --hash-size can be honored. */
1313 parse_args (&argc
, &argv
);
1315 if (argc
> 1 && stat (out_file_name
, &sob
) == 0)
1319 for (i
= 1; i
< argc
; ++i
)
1323 /* Check that the input file and output file are different. */
1324 if (stat (argv
[i
], &sib
) == 0
1325 && sib
.st_ino
== sob
.st_ino
1326 /* POSIX emulating systems may support stat() but if the
1327 underlying file system does not support a file serial number
1328 of some kind then they will return 0 for the inode. So
1329 two files with an inode of 0 may not actually be the same.
1330 On real POSIX systems no ordinary file will ever have an
1333 /* Different files may have the same inode number if they
1334 reside on different devices, so check the st_dev field as
1336 && sib
.st_dev
== sob
.st_dev
1337 /* PR 25572: Only check regular files. Devices, sockets and so
1338 on might actually work as both input and output. Plus there
1339 is a use case for using /dev/null as both input and output
1340 when checking for command line option support in a script:
1341 as --foo /dev/null -o /dev/null; if $? then ... */
1342 && S_ISREG (sib
.st_mode
))
1344 const char *saved_out_file_name
= out_file_name
;
1346 /* Don't let as_fatal remove the output file! */
1347 out_file_name
= NULL
;
1348 as_fatal (_("The input '%s' and output '%s' files are the same"),
1349 argv
[i
], saved_out_file_name
);
1358 input_scrub_begin ();
1361 /* It has to be called after dump_statistics (). */
1362 xatexit (close_output_file
);
1364 if (flag_print_statistics
)
1365 xatexit (dump_statistics
);
1369 macro_strip_at
= flag_mri
;
1372 macro_init (flag_macro_alternate
, flag_mri
, macro_strip_at
, macro_expr
);
1376 output_file_create (out_file_name
);
1377 gas_assert (stdoutput
!= 0);
1381 #ifdef tc_init_after_args
1382 tc_init_after_args ();
1389 local_symbol_make (".gasversion.", absolute_section
,
1390 &predefined_address_frag
, BFD_VERSION
/ 10000UL);
1392 /* Now that we have fully initialized, and have created the output
1393 file, define any symbols requested by --defsym command line
1395 while (defsyms
!= NULL
)
1398 struct defsym_list
*next
;
1400 sym
= symbol_new (defsyms
->name
, absolute_section
,
1401 &zero_address_frag
, defsyms
->value
);
1402 /* Make symbols defined on the command line volatile, so that they
1403 can be redefined inside a source file. This makes this assembler's
1404 behaviour compatible with earlier versions, but it may not be
1405 completely intuitive. */
1406 S_SET_VOLATILE (sym
);
1407 symbol_table_insert (sym
);
1408 next
= defsyms
->next
;
1416 perform_an_assembly_pass (argc
, argv
);
1418 cond_finish_check (-1);
1424 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1425 if ((flag_execstack
|| flag_noexecstack
)
1426 && OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
1430 gnustack
= subseg_new (".note.GNU-stack", 0);
1431 bfd_set_section_flags (gnustack
,
1432 SEC_READONLY
| (flag_execstack
? SEC_CODE
: 0));
1437 /* If we've been collecting dwarf2 .debug_line info, either for
1438 assembly debugging or on behalf of the compiler, emit it now. */
1441 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1442 directives from the user or by the backend, emit it now. */
1446 if (seen_at_least_1_file ())
1448 int n_warns
, n_errs
;
1452 write_object_file ();
1454 n_warns
= had_warnings ();
1455 n_errs
= had_errors ();
1458 ngettext ("%d warning", "%d warnings", n_warns
), n_warns
);
1460 ngettext ("%d error", "%d errors", n_errs
), n_errs
);
1461 if (flag_fatal_warnings
&& n_warns
!= 0)
1464 as_bad (_("%s, treating warnings as errors"), warn_msg
);
1470 else if (flag_always_generate_output
)
1472 /* The -Z flag indicates that an object file should be generated,
1473 regardless of warnings and errors. */
1475 fprintf (stderr
, _("%s, %s, generating bad object file\n"),
1483 listing_print (listing_filename
, argv_orig
);
1488 END_PROGRESS (myname
);
1490 /* Use xexit instead of return, because under VMS environments they
1491 may not place the same interpretation on the value given. */
1492 if (had_errors () != 0)
1493 xexit (EXIT_FAILURE
);
1495 /* Only generate dependency file if assembler was successful. */
1496 print_dependencies ();
1498 xexit (EXIT_SUCCESS
);