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
;
125 static long start_time
;
127 static int flag_macro_alternate
;
130 #ifdef USE_EMULATIONS
131 #define EMULATION_ENVIRON "AS_EMULATION"
133 extern struct emulation mipsbelf
, mipslelf
, mipself
;
134 extern struct emulation i386coff
, i386elf
, i386aout
;
135 extern struct emulation crisaout
, criself
;
137 static struct emulation
*const emulations
[] = { EMULATIONS
};
138 static const int n_emulations
= sizeof (emulations
) / sizeof (emulations
[0]);
141 select_emulation_mode (int argc
, char **argv
)
145 const char *em
= NULL
;
147 for (i
= 1; i
< argc
; i
++)
148 if (startswith (argv
[i
], "--em"))
154 p
= strchr (argv
[i
], '=');
161 as_fatal (_("missing emulation mode name"));
166 em
= getenv (EMULATION_ENVIRON
);
168 em
= DEFAULT_EMULATION
;
172 for (i
= 0; i
< n_emulations
; i
++)
173 if (!strcmp (emulations
[i
]->name
, em
))
175 if (i
== n_emulations
)
176 as_fatal (_("unrecognized emulation name `%s'"), em
);
177 this_emulation
= emulations
[i
];
180 this_emulation
= emulations
[0];
182 this_emulation
->init ();
186 default_emul_bfd_name (void)
193 common_emul_init (void)
195 this_format
= this_emulation
->format
;
197 if (this_emulation
->leading_underscore
== 2)
198 this_emulation
->leading_underscore
= this_format
->dfl_leading_underscore
;
200 if (this_emulation
->default_endian
!= 2)
201 target_big_endian
= this_emulation
->default_endian
;
203 if (this_emulation
->fake_label_name
== 0)
205 if (this_emulation
->leading_underscore
)
206 this_emulation
->fake_label_name
= FAKE_LABEL_NAME
;
208 /* What other parameters should we test? */
209 this_emulation
->fake_label_name
= "." FAKE_LABEL_NAME
;
215 print_version_id (void)
223 fprintf (stderr
, _("GNU assembler version %s (%s) using BFD version %s\n"),
224 VERSION
, TARGET_ALIAS
, BFD_VERSION_STRING
);
227 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
228 enum compressed_debug_section_type flag_compress_debug
229 = COMPRESS_DEBUG_GABI_ZLIB
;
233 show_usage (FILE * stream
)
235 fprintf (stream
, _("Usage: %s [option...] [asmfile...]\n"), myname
);
237 fprintf (stream
, _("\
239 -a[sub-option...] turn on listings\n\
240 Sub-options [default hls]:\n\
241 c omit false conditionals\n\
242 d omit debugging directives\n\
243 g include general info\n\
244 h include high-level source\n\
245 l include assembly\n\
246 m include macro expansions\n\
247 n omit forms processing\n\
249 =FILE list to FILE (must be last sub-option)\n"));
251 fprintf (stream
, _("\
252 --alternate initially turn on alternate macro syntax\n"));
253 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
254 fprintf (stream
, _("\
255 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
256 compress DWARF debug sections using zlib [default]\n"));
257 fprintf (stream
, _("\
258 --nocompress-debug-sections\n\
259 don't compress DWARF debug sections\n"));
261 fprintf (stream
, _("\
262 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
263 compress DWARF debug sections using zlib\n"));
264 fprintf (stream
, _("\
265 --nocompress-debug-sections\n\
266 don't compress DWARF debug sections [default]\n"));
268 fprintf (stream
, _("\
269 -D produce assembler debugging messages\n"));
270 fprintf (stream
, _("\
271 --debug-prefix-map OLD=NEW\n\
272 map OLD to NEW in debug information\n"));
273 fprintf (stream
, _("\
274 --defsym SYM=VAL define symbol SYM to given value\n"));
275 #ifdef USE_EMULATIONS
282 for (i
= 0; i
< n_emulations
- 1; i
++)
283 fprintf (stream
, "%s | ", emulations
[i
]->name
);
284 fprintf (stream
, "%s]\n", emulations
[i
]->name
);
286 def_em
= getenv (EMULATION_ENVIRON
);
288 def_em
= DEFAULT_EMULATION
;
289 fprintf (stream
, _("\
290 emulate output (default %s)\n"), def_em
);
293 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
294 fprintf (stream
, _("\
295 --execstack require executable stack for this object\n"));
296 fprintf (stream
, _("\
297 --noexecstack don't require executable stack for this object\n"));
298 fprintf (stream
, _("\
299 --size-check=[error|warning]\n\
300 ELF .size directive check (default --size-check=error)\n"));
301 fprintf (stream
, _("\
302 --elf-stt-common=[no|yes] "));
303 if (DEFAULT_GENERATE_ELF_STT_COMMON
)
304 fprintf (stream
, _("(default: yes)\n"));
306 fprintf (stream
, _("(default: no)\n"));
307 fprintf (stream
, _("\
308 generate ELF common symbols with STT_COMMON type\n"));
309 fprintf (stream
, _("\
310 --sectname-subst enable section name substitution sequences\n"));
312 fprintf (stream
, _("\
313 --generate-missing-build-notes=[no|yes] "));
314 #if DEFAULT_GENERATE_BUILD_NOTES
315 fprintf (stream
, _("(default: yes)\n"));
317 fprintf (stream
, _("(default: no)\n"));
319 fprintf (stream
, _("\
320 generate GNU Build notes if none are present in the input\n"));
323 fprintf (stream
, _("\
324 -f skip whitespace and comment preprocessing\n"));
325 fprintf (stream
, _("\
326 -g --gen-debug generate debugging information\n"));
327 fprintf (stream
, _("\
328 --gstabs generate STABS debugging information\n"));
329 fprintf (stream
, _("\
330 --gstabs+ generate STABS debug info with GNU extensions\n"));
331 fprintf (stream
, _("\
332 --gdwarf-<N> generate DWARF<N> debugging information. 2 <= <N> <= 5\n"));
333 fprintf (stream
, _("\
334 --gdwarf-sections generate per-function section names for DWARF line information\n"));
335 fprintf (stream
, _("\
336 --target-help show target specific options\n"));
337 fprintf (stream
, _("\
338 -I DIR add DIR to search list for .include directives\n"));
339 fprintf (stream
, _("\
340 -J don't warn about signed overflow\n"));
341 fprintf (stream
, _("\
342 -K warn when differences altered for long displacements\n"));
343 fprintf (stream
, _("\
344 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
345 fprintf (stream
, _("\
346 -M,--mri assemble in MRI compatibility mode\n"));
347 fprintf (stream
, _("\
348 --MD FILE write dependency information in FILE (default none)\n"));
349 fprintf (stream
, _("\
351 fprintf (stream
, _("\
352 -no-pad-sections do not pad the end of sections to alignment boundaries\n"));
353 fprintf (stream
, _("\
354 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
355 fprintf (stream
, _("\
356 -R fold data section into text section\n"));
357 fprintf (stream
, _("\
358 --statistics print various measured statistics from execution\n"));
359 fprintf (stream
, _("\
360 --strip-local-absolute strip local absolute symbols\n"));
361 fprintf (stream
, _("\
362 --traditional-format Use same format as native assembler when possible\n"));
363 fprintf (stream
, _("\
364 --version print assembler version number and exit\n"));
365 fprintf (stream
, _("\
366 -W --no-warn suppress warnings\n"));
367 fprintf (stream
, _("\
368 --warn don't suppress warnings\n"));
369 fprintf (stream
, _("\
370 --fatal-warnings treat warnings as errors\n"));
372 fprintf (stream
, _("\
373 --itbl INSTTBL extend instruction set to include instructions\n\
374 matching the specifications defined in file INSTTBL\n"));
376 fprintf (stream
, _("\
378 fprintf (stream
, _("\
380 fprintf (stream
, _("\
381 -Z generate object file even after errors\n"));
382 fprintf (stream
, _("\
383 --listing-lhs-width set the width in words of the output data column of\n\
385 fprintf (stream
, _("\
386 --listing-lhs-width2 set the width in words of the continuation lines\n\
387 of the output data column; ignored if smaller than\n\
388 the width of the first line\n"));
389 fprintf (stream
, _("\
390 --listing-rhs-width set the max width in characters of the lines from\n\
391 the source file\n"));
392 fprintf (stream
, _("\
393 --listing-cont-lines set the maximum number of continuation lines used\n\
394 for the output data column of the listing\n"));
395 fprintf (stream
, _("\
396 @FILE read options from FILE\n"));
398 md_show_usage (stream
);
400 fputc ('\n', stream
);
402 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
403 fprintf (stream
, _("Report bugs to %s\n"), REPORT_BUGS_TO
);
406 /* Since it is easy to do here we interpret the special arg "-"
407 to mean "use stdin" and we set that argv[] pointing to "".
408 After we have munged argv[], the only things left are source file
409 name(s) and ""(s) denoting stdin. These file names are used
410 (perhaps more than once) later.
412 check for new machine-dep cmdline options in
413 md_parse_option definitions in config/tc-*.c. */
416 parse_args (int * pargc
, char *** pargv
)
422 /* Starting the short option string with '-' is for programs that
423 expect options and other ARGV-elements in any order and that care about
424 the ordering of the two. We describe each non-option ARGV-element
425 as if it were the argument of an option with character code 1. */
427 extern const char *md_shortopts
;
428 static const char std_shortopts
[] =
431 #ifndef WORKING_DOT_WORD
432 /* -K is not meaningful if .word is not being hacked. */
435 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
437 /* -v takes an argument on VMS, so we don't make it a generic
443 /* New option for extending instruction set (see also --itbl below). */
448 struct option
*longopts
;
449 extern struct option md_longopts
[];
450 extern size_t md_longopts_size
;
451 /* Codes used for the long options with no short synonyms. */
454 OPTION_HELP
= OPTION_STD_BASE
,
461 OPTION_DEBUG_PREFIX_MAP
,
463 OPTION_LISTING_LHS_WIDTH
,
464 OPTION_LISTING_LHS_WIDTH2
, /* = STD_BASE + 10 */
465 OPTION_LISTING_RHS_WIDTH
,
466 OPTION_LISTING_CONT_LINES
,
474 OPTION_GDWARF_SECTIONS
, /* = STD_BASE + 20 */
475 OPTION_GDWARF_CIE_VERSION
,
476 OPTION_STRIP_LOCAL_ABSOLUTE
,
477 OPTION_TRADITIONAL_FORMAT
,
483 OPTION_ELF_STT_COMMON
,
484 OPTION_ELF_BUILD_NOTES
, /* = STD_BASE + 30 */
485 OPTION_SECTNAME_SUBST
,
488 OPTION_HASH_TABLE_SIZE
,
489 OPTION_REDUCE_MEMORY_OVERHEADS
,
491 OPTION_COMPRESS_DEBUG
,
492 OPTION_NOCOMPRESS_DEBUG
,
493 OPTION_NO_PAD_SECTIONS
,
494 OPTION_MULTIBYTE_HANDLING
/* = STD_BASE + 40 */
495 /* When you add options here, check that they do
496 not collide with OPTION_MD_BASE. See as.h. */
499 static const struct option std_longopts
[] =
501 /* Note: commas are placed at the start of the line rather than
502 the end of the preceding line so that it is simpler to
503 selectively add and remove lines from this list. */
504 {"alternate", no_argument
, NULL
, OPTION_ALTERNATE
}
505 /* The entry for "a" is here to prevent getopt_long_only() from
506 considering that -a is an abbreviation for --alternate. This is
507 necessary because -a=<FILE> is a valid switch but getopt would
508 normally reject it since --alternate does not take an argument. */
509 ,{"a", optional_argument
, NULL
, 'a'}
510 /* Handle -al=<FILE>. */
511 ,{"al", optional_argument
, NULL
, OPTION_AL
}
512 ,{"compress-debug-sections", optional_argument
, NULL
, OPTION_COMPRESS_DEBUG
}
513 ,{"nocompress-debug-sections", no_argument
, NULL
, OPTION_NOCOMPRESS_DEBUG
}
514 ,{"debug-prefix-map", required_argument
, NULL
, OPTION_DEBUG_PREFIX_MAP
}
515 ,{"defsym", required_argument
, NULL
, OPTION_DEFSYM
}
516 ,{"dump-config", no_argument
, NULL
, OPTION_DUMPCONFIG
}
517 ,{"emulation", required_argument
, NULL
, OPTION_EMULATION
}
518 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
519 ,{"execstack", no_argument
, NULL
, OPTION_EXECSTACK
}
520 ,{"noexecstack", no_argument
, NULL
, OPTION_NOEXECSTACK
}
521 ,{"size-check", required_argument
, NULL
, OPTION_SIZE_CHECK
}
522 ,{"elf-stt-common", required_argument
, NULL
, OPTION_ELF_STT_COMMON
}
523 ,{"sectname-subst", no_argument
, NULL
, OPTION_SECTNAME_SUBST
}
524 ,{"generate-missing-build-notes", required_argument
, NULL
, OPTION_ELF_BUILD_NOTES
}
526 ,{"fatal-warnings", no_argument
, NULL
, OPTION_WARN_FATAL
}
527 ,{"gdwarf-2", no_argument
, NULL
, OPTION_GDWARF_2
}
528 ,{"gdwarf-3", no_argument
, NULL
, OPTION_GDWARF_3
}
529 ,{"gdwarf-4", no_argument
, NULL
, OPTION_GDWARF_4
}
530 ,{"gdwarf-5", no_argument
, NULL
, OPTION_GDWARF_5
}
531 /* GCC uses --gdwarf-2 but GAS used to to use --gdwarf2,
532 so we keep it here for backwards compatibility. */
533 ,{"gdwarf2", no_argument
, NULL
, OPTION_GDWARF_2
}
534 ,{"gdwarf-sections", no_argument
, NULL
, OPTION_GDWARF_SECTIONS
}
535 ,{"gdwarf-cie-version", required_argument
, NULL
, OPTION_GDWARF_CIE_VERSION
}
536 ,{"gen-debug", no_argument
, NULL
, 'g'}
537 ,{"gstabs", no_argument
, NULL
, OPTION_GSTABS
}
538 ,{"gstabs+", no_argument
, NULL
, OPTION_GSTABS_PLUS
}
539 ,{"hash-size", required_argument
, NULL
, OPTION_HASH_TABLE_SIZE
}
540 ,{"help", no_argument
, NULL
, OPTION_HELP
}
542 /* New option for extending instruction set (see also -t above).
543 The "-t file" or "--itbl file" option extends the basic set of
544 valid instructions by reading "file", a text file containing a
545 list of instruction formats. The additional opcodes and their
546 formats are added to the built-in set of instructions, and
547 mnemonics for new registers may also be defined. */
548 ,{"itbl", required_argument
, NULL
, 't'}
550 /* getopt allows abbreviations, so we do this to stop it from
551 treating -k as an abbreviation for --keep-locals. Some
552 ports use -k to enable PIC assembly. */
553 ,{"keep-locals", no_argument
, NULL
, 'L'}
554 ,{"keep-locals", no_argument
, NULL
, 'L'}
555 ,{"listing-lhs-width", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH
}
556 ,{"listing-lhs-width2", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH2
}
557 ,{"listing-rhs-width", required_argument
, NULL
, OPTION_LISTING_RHS_WIDTH
}
558 ,{"listing-cont-lines", required_argument
, NULL
, OPTION_LISTING_CONT_LINES
}
559 ,{"MD", required_argument
, NULL
, OPTION_DEPFILE
}
560 ,{"mri", no_argument
, NULL
, 'M'}
561 ,{"nocpp", no_argument
, NULL
, OPTION_NOCPP
}
562 ,{"no-pad-sections", no_argument
, NULL
, OPTION_NO_PAD_SECTIONS
}
563 ,{"no-warn", no_argument
, NULL
, 'W'}
564 ,{"reduce-memory-overheads", no_argument
, NULL
, OPTION_REDUCE_MEMORY_OVERHEADS
}
565 ,{"statistics", no_argument
, NULL
, OPTION_STATISTICS
}
566 ,{"strip-local-absolute", no_argument
, NULL
, OPTION_STRIP_LOCAL_ABSOLUTE
}
567 ,{"version", no_argument
, NULL
, OPTION_VERSION
}
568 ,{"verbose", no_argument
, NULL
, OPTION_VERBOSE
}
569 ,{"target-help", no_argument
, NULL
, OPTION_TARGET_HELP
}
570 ,{"traditional-format", no_argument
, NULL
, OPTION_TRADITIONAL_FORMAT
}
571 ,{"warn", no_argument
, NULL
, OPTION_WARN
}
572 ,{"multibyte-handling", required_argument
, NULL
, OPTION_MULTIBYTE_HANDLING
}
575 /* Construct the option lists from the standard list and the target
576 dependent list. Include space for an extra NULL option and
577 always NULL terminate. */
578 shortopts
= concat (std_shortopts
, md_shortopts
, (char *) NULL
);
579 longopts
= (struct option
*) xmalloc (sizeof (std_longopts
)
580 + md_longopts_size
+ sizeof (struct option
));
581 memcpy (longopts
, std_longopts
, sizeof (std_longopts
));
582 memcpy (((char *) longopts
) + sizeof (std_longopts
), md_longopts
, md_longopts_size
);
583 memset (((char *) longopts
) + sizeof (std_longopts
) + md_longopts_size
,
584 0, sizeof (struct option
));
586 /* Make a local copy of the old argv. */
590 /* Initialize a new argv that contains no options. */
591 new_argv
= notes_alloc (sizeof (char *) * (old_argc
+ 1));
592 new_argv
[0] = old_argv
[0];
594 new_argv
[new_argc
] = NULL
;
598 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
599 indicate a long option. */
601 int optc
= getopt_long_only (old_argc
, old_argv
, shortopts
, longopts
,
610 /* md_parse_option should return 1 if it recognizes optc,
612 if (md_parse_option (optc
, optarg
) != 0)
614 /* `-v' isn't included in the general short_opts list, so check for
615 it explicitly here before deciding we've gotten a bad argument. */
619 /* Telling getopt to treat -v's value as optional can result
620 in it picking up a following filename argument here. The
621 VMS code in md_parse_option can return 0 in that case,
622 but it has no way of pushing the filename argument back. */
623 if (optarg
&& *optarg
)
624 new_argv
[new_argc
++] = optarg
, new_argv
[new_argc
] = NULL
;
635 as_bad (_("unrecognized option -%c%s"), optc
, optarg
? optarg
: "");
641 case 1: /* File name. */
642 if (!strcmp (optarg
, "-"))
643 optarg
= (char *) "";
644 new_argv
[new_argc
++] = optarg
;
645 new_argv
[new_argc
] = NULL
;
648 case OPTION_TARGET_HELP
:
649 md_show_usage (stdout
);
659 case OPTION_NO_PAD_SECTIONS
:
660 do_not_pad_sections_to_alignment
= 1;
663 case OPTION_STATISTICS
:
664 flag_print_statistics
= 1;
667 case OPTION_STRIP_LOCAL_ABSOLUTE
:
668 flag_strip_local_absolute
= 1;
671 case OPTION_TRADITIONAL_FORMAT
:
672 flag_traditional_format
= 1;
675 case OPTION_MULTIBYTE_HANDLING
:
676 if (strcmp (optarg
, "allow") == 0)
677 multibyte_handling
= multibyte_allow
;
678 else if (strcmp (optarg
, "warn") == 0)
679 multibyte_handling
= multibyte_warn
;
680 else if (strcmp (optarg
, "warn-sym-only") == 0)
681 multibyte_handling
= multibyte_warn_syms
;
682 else if (strcmp (optarg
, "warn_sym_only") == 0)
683 multibyte_handling
= multibyte_warn_syms
;
685 as_fatal (_("unexpected argument to --multibyte-input-option: '%s'"), optarg
);
689 /* This output is intended to follow the GNU standards document. */
690 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING
);
691 printf (_("Copyright (C) 2022 Free Software Foundation, Inc.\n"));
693 This program is free software; you may redistribute it under the terms of\n\
694 the GNU General Public License version 3 or later.\n\
695 This program has absolutely no warranty.\n"));
696 #ifdef TARGET_WITH_CPU
697 printf (_("This assembler was configured for a target of `%s' "
698 "and default,\ncpu type `%s'.\n"),
699 TARGET_ALIAS
, TARGET_WITH_CPU
);
701 printf (_("This assembler was configured for a target of `%s'.\n"),
706 case OPTION_EMULATION
:
707 #ifdef USE_EMULATIONS
708 if (strcmp (optarg
, this_emulation
->name
))
709 as_fatal (_("multiple emulation names specified"));
711 as_fatal (_("emulations not handled in this configuration"));
715 case OPTION_DUMPCONFIG
:
716 fprintf (stderr
, _("alias = %s\n"), TARGET_ALIAS
);
717 fprintf (stderr
, _("canonical = %s\n"), TARGET_CANONICAL
);
718 fprintf (stderr
, _("cpu-type = %s\n"), TARGET_CPU
);
719 #ifdef TARGET_OBJ_FORMAT
720 fprintf (stderr
, _("format = %s\n"), TARGET_OBJ_FORMAT
);
723 fprintf (stderr
, _("bfd-target = %s\n"), TARGET_FORMAT
);
727 case OPTION_COMPRESS_DEBUG
:
730 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
731 if (strcasecmp (optarg
, "none") == 0)
732 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
733 else if (strcasecmp (optarg
, "zlib") == 0)
734 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
735 else if (strcasecmp (optarg
, "zlib-gnu") == 0)
736 flag_compress_debug
= COMPRESS_DEBUG_GNU_ZLIB
;
737 else if (strcasecmp (optarg
, "zlib-gabi") == 0)
738 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
740 as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
743 as_fatal (_("--compress-debug-sections=%s is unsupported"),
748 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
751 case OPTION_NOCOMPRESS_DEBUG
:
752 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
755 case OPTION_DEBUG_PREFIX_MAP
:
756 add_debug_prefix_map (optarg
);
763 struct defsym_list
*n
;
765 for (s
= optarg
; *s
!= '\0' && *s
!= '='; s
++)
768 as_fatal (_("bad defsym; format is --defsym name=value"));
770 i
= bfd_scan_vma (s
, (const char **) NULL
, 0);
771 n
= XNEW (struct defsym_list
);
782 /* optarg is the name of the file containing the instruction
783 formats, opcodes, register names, etc. */
786 as_warn (_("no file name following -t option"));
790 /* Parse the file and add the new instructions to our internal
791 table. If multiple instruction tables are specified, the
792 information from this table gets appended onto the existing
794 if (itbl_parse (optarg
) != 0)
795 as_fatal (_("failed to read instruction table %s\n"),
802 start_dependencies (optarg
);
806 /* Some backends, eg Alpha and Mips, use the -g switch for their
807 own purposes. So we check here for an explicit -g and allow
808 the backend to decide if it wants to process it. */
809 if ( old_argv
[optind
- 1][1] == 'g'
810 && md_parse_option (optc
, optarg
))
813 /* We end up here for any -gsomething-not-already-a-long-option.
814 give some useful feedback on not (yet) supported -gdwarfxxx
815 versions/sections/options. */
816 if (startswith (old_argv
[optind
- 1], "-gdwarf"))
817 as_fatal (_("unknown DWARF option %s\n"), old_argv
[optind
- 1]);
818 else if (old_argv
[optind
- 1][1] == 'g' && optarg
!= NULL
)
819 as_fatal (_("unknown option `%s'"), old_argv
[optind
- 1]);
821 if (md_debug_format_selector
)
822 debug_type
= md_debug_format_selector (& use_gnu_debug_info_extensions
);
825 debug_type
= DEBUG_DWARF2
;
829 debug_type
= DEBUG_STABS
;
832 case OPTION_GSTABS_PLUS
:
833 use_gnu_debug_info_extensions
= 1;
836 debug_type
= DEBUG_STABS
;
839 case OPTION_GDWARF_2
:
840 debug_type
= DEBUG_DWARF2
;
844 case OPTION_GDWARF_3
:
845 debug_type
= DEBUG_DWARF2
;
849 case OPTION_GDWARF_4
:
850 debug_type
= DEBUG_DWARF2
;
854 case OPTION_GDWARF_5
:
855 debug_type
= DEBUG_DWARF2
;
859 case OPTION_GDWARF_SECTIONS
:
860 flag_dwarf_sections
= true;
863 case OPTION_GDWARF_CIE_VERSION
:
864 flag_dwarf_cie_version
= atoi (optarg
);
865 /* The available CIE versions are 1 (DWARF 2), 3 (DWARF 3), and 4
867 if (flag_dwarf_cie_version
< 1
868 || flag_dwarf_cie_version
== 2
869 || flag_dwarf_cie_version
> 4)
870 as_fatal (_("Invalid --gdwarf-cie-version `%s'"), optarg
);
871 switch (flag_dwarf_cie_version
)
889 flag_signed_overflow_ok
= 1;
892 #ifndef WORKING_DOT_WORD
894 flag_warn_displacement
= 1;
898 flag_keep_locals
= 1;
901 case OPTION_LISTING_LHS_WIDTH
:
902 listing_lhs_width
= atoi (optarg
);
903 if (listing_lhs_width_second
< listing_lhs_width
)
904 listing_lhs_width_second
= listing_lhs_width
;
906 case OPTION_LISTING_LHS_WIDTH2
:
908 int tmp
= atoi (optarg
);
910 if (tmp
> listing_lhs_width
)
911 listing_lhs_width_second
= tmp
;
914 case OPTION_LISTING_RHS_WIDTH
:
915 listing_rhs_width
= atoi (optarg
);
917 case OPTION_LISTING_CONT_LINES
:
918 listing_lhs_cont_lines
= atoi (optarg
);
929 flag_readonly_data_in_text
= 1;
933 flag_no_warnings
= 1;
937 flag_no_warnings
= 0;
938 flag_fatal_warnings
= 0;
941 case OPTION_WARN_FATAL
:
942 flag_no_warnings
= 0;
943 flag_fatal_warnings
= 1;
946 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
947 case OPTION_EXECSTACK
:
949 flag_noexecstack
= 0;
952 case OPTION_NOEXECSTACK
:
953 flag_noexecstack
= 1;
957 case OPTION_SIZE_CHECK
:
958 if (strcasecmp (optarg
, "error") == 0)
959 flag_allow_nonconst_size
= false;
960 else if (strcasecmp (optarg
, "warning") == 0)
961 flag_allow_nonconst_size
= true;
963 as_fatal (_("Invalid --size-check= option: `%s'"), optarg
);
966 case OPTION_ELF_STT_COMMON
:
967 if (strcasecmp (optarg
, "no") == 0)
968 flag_use_elf_stt_common
= 0;
969 else if (strcasecmp (optarg
, "yes") == 0)
970 flag_use_elf_stt_common
= 1;
972 as_fatal (_("Invalid --elf-stt-common= option: `%s'"),
976 case OPTION_SECTNAME_SUBST
:
977 flag_sectname_subst
= 1;
980 case OPTION_ELF_BUILD_NOTES
:
981 if (strcasecmp (optarg
, "no") == 0)
982 flag_generate_build_notes
= false;
983 else if (strcasecmp (optarg
, "yes") == 0)
984 flag_generate_build_notes
= true;
986 as_fatal (_("Invalid --generate-missing-build-notes option: `%s'"),
993 flag_always_generate_output
= 1;
997 listing
|= LISTING_LISTING
;
999 listing_filename
= notes_strdup (optarg
);
1002 case OPTION_ALTERNATE
:
1003 optarg
= old_argv
[optind
- 1];
1004 while (* optarg
== '-')
1007 if (strcmp (optarg
, "alternate") == 0)
1009 flag_macro_alternate
= 1;
1018 if (optarg
!= old_argv
[optind
] && optarg
[-1] == '=')
1021 if (md_parse_option (optc
, optarg
) != 0)
1029 listing
|= LISTING_NOCOND
;
1032 listing
|= LISTING_NODEBUG
;
1035 listing
|= LISTING_GENERAL
;
1038 listing
|= LISTING_HLL
;
1041 listing
|= LISTING_LISTING
;
1044 listing
|= LISTING_MACEXP
;
1047 listing
|= LISTING_NOFORM
;
1050 listing
|= LISTING_SYMBOLS
;
1053 listing_filename
= notes_strdup (optarg
+ 1);
1054 optarg
+= strlen (listing_filename
);
1057 as_fatal (_("invalid listing option `%c'"), *optarg
);
1064 listing
= LISTING_DEFAULT
;
1068 /* DEBUG is implemented: it debugs different
1069 things from other people's assemblers. */
1074 flag_no_comments
= 1;
1078 { /* Include file directory. */
1079 char *temp
= notes_strdup (optarg
);
1081 add_include_dir (temp
);
1086 out_file_name
= notes_strdup (optarg
);
1093 /* -X means treat warnings as errors. */
1096 case OPTION_REDUCE_MEMORY_OVERHEADS
:
1099 case OPTION_HASH_TABLE_SIZE
:
1110 #ifdef md_after_parse_args
1111 md_after_parse_args ();
1116 dump_statistics (void)
1118 long run_time
= get_run_time () - start_time
;
1120 fprintf (stderr
, _("%s: total time in assembly: %ld.%06ld\n"),
1121 myname
, run_time
/ 1000000, run_time
% 1000000);
1123 subsegs_print_statistics (stderr
);
1124 write_print_statistics (stderr
);
1125 symbol_print_statistics (stderr
);
1126 read_print_statistics (stderr
);
1128 #ifdef tc_print_statistics
1129 tc_print_statistics (stderr
);
1132 #ifdef obj_print_statistics
1133 obj_print_statistics (stderr
);
1137 /* The interface between the macro code and gas expression handling. */
1140 macro_expr (const char *emsg
, size_t idx
, sb
*in
, offsetT
*val
)
1146 temp_ilp (in
->ptr
+ idx
);
1147 expression_and_evaluate (&ex
);
1148 idx
= input_line_pointer
- in
->ptr
;
1151 if (ex
.X_op
!= O_constant
)
1152 as_bad ("%s", emsg
);
1154 *val
= ex
.X_add_number
;
1159 /* Here to attempt 1 pass over each input file.
1160 We scan argv[*] looking for filenames or exactly "" which is
1161 shorthand for stdin. Any argv that is NULL is not a file-name.
1162 We set need_pass_2 TRUE if, after this, we still have unresolved
1163 expressions of the form (unknown value)+-(unknown value).
1165 Note the un*x semantics: there is only 1 logical input file, but it
1166 may be a catenation of many 'physical' input files. */
1169 perform_an_assembly_pass (int argc
, char ** argv
)
1173 flagword applicable
;
1179 /* Create the standard sections, and those the assembler uses
1181 text_section
= subseg_new (TEXT_SECTION_NAME
, 0);
1182 data_section
= subseg_new (DATA_SECTION_NAME
, 0);
1183 bss_section
= subseg_new (BSS_SECTION_NAME
, 0);
1184 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1185 to have relocs, otherwise we don't find out in time. */
1186 applicable
= bfd_applicable_section_flags (stdoutput
);
1187 bfd_set_section_flags (text_section
,
1188 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1189 | SEC_CODE
| SEC_READONLY
));
1190 bfd_set_section_flags (data_section
,
1191 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1193 bfd_set_section_flags (bss_section
, applicable
& SEC_ALLOC
);
1194 seg_info (bss_section
)->bss
= 1;
1196 subseg_new (BFD_ABS_SECTION_NAME
, 0);
1197 subseg_new (BFD_UND_SECTION_NAME
, 0);
1198 reg_section
= subseg_new ("*GAS `reg' section*", 0);
1199 expr_section
= subseg_new ("*GAS `expr' section*", 0);
1202 subseg_set (text_section
, 0);
1205 /* This may add symbol table entries, which requires having an open BFD,
1206 and sections already created. */
1223 { /* Is it a file-name argument? */
1226 /* argv->"" if stdin desired, else->filename. */
1227 read_a_source_file (*argv
);
1229 argv
++; /* Completed that argv. */
1232 read_a_source_file ("");
1238 _obstack_free (¬es
, NULL
);
1242 main (int argc
, char ** argv
)
1244 char ** argv_orig
= argv
;
1249 start_time
= get_run_time ();
1252 #ifdef HAVE_LC_MESSAGES
1253 setlocale (LC_MESSAGES
, "");
1255 setlocale (LC_CTYPE
, "");
1256 bindtextdomain (PACKAGE
, LOCALEDIR
);
1257 textdomain (PACKAGE
);
1262 #ifdef HOST_SPECIAL_INIT
1263 HOST_SPECIAL_INIT (argc
, argv
);
1267 xmalloc_set_program_name (myname
);
1269 expandargv (&argc
, &argv
);
1271 START_PROGRESS (myname
, 0);
1273 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1274 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1277 out_file_name
= OBJ_DEFAULT_OUTPUT_FILE_NAME
;
1280 if (bfd_init () != BFD_INIT_MAGIC
)
1281 as_fatal (_("libbfd ABI mismatch"));
1282 bfd_set_error_program_name (myname
);
1284 #ifdef USE_EMULATIONS
1285 select_emulation_mode (argc
, argv
);
1288 obstack_begin (¬es
, chunksize
);
1289 xatexit (free_notes
);
1292 /* Call parse_args before any of the init/begin functions
1293 so that switches like --hash-size can be honored. */
1294 parse_args (&argc
, &argv
);
1296 if (argc
> 1 && stat (out_file_name
, &sob
) == 0)
1300 for (i
= 1; i
< argc
; ++i
)
1304 /* Check that the input file and output file are different. */
1305 if (stat (argv
[i
], &sib
) == 0
1306 && sib
.st_ino
== sob
.st_ino
1307 /* POSIX emulating systems may support stat() but if the
1308 underlying file system does not support a file serial number
1309 of some kind then they will return 0 for the inode. So
1310 two files with an inode of 0 may not actually be the same.
1311 On real POSIX systems no ordinary file will ever have an
1314 /* Different files may have the same inode number if they
1315 reside on different devices, so check the st_dev field as
1317 && sib
.st_dev
== sob
.st_dev
1318 /* PR 25572: Only check regular files. Devices, sockets and so
1319 on might actually work as both input and output. Plus there
1320 is a use case for using /dev/null as both input and output
1321 when checking for command line option support in a script:
1322 as --foo /dev/null -o /dev/null; if $? then ... */
1323 && S_ISREG (sib
.st_mode
))
1325 const char *saved_out_file_name
= out_file_name
;
1327 /* Don't let as_fatal remove the output file! */
1328 out_file_name
= NULL
;
1329 as_fatal (_("The input '%s' and output '%s' files are the same"),
1330 argv
[i
], saved_out_file_name
);
1339 input_scrub_begin ();
1342 /* It has to be called after dump_statistics (). */
1343 xatexit (output_file_close
);
1345 if (flag_print_statistics
)
1346 xatexit (dump_statistics
);
1350 macro_strip_at
= flag_mri
;
1353 macro_init (flag_macro_alternate
, flag_mri
, macro_strip_at
, macro_expr
);
1357 output_file_create (out_file_name
);
1358 gas_assert (stdoutput
!= 0);
1362 #ifdef tc_init_after_args
1363 tc_init_after_args ();
1370 local_symbol_make (".gasversion.", absolute_section
,
1371 &predefined_address_frag
, BFD_VERSION
/ 10000UL);
1373 /* Now that we have fully initialized, and have created the output
1374 file, define any symbols requested by --defsym command line
1376 while (defsyms
!= NULL
)
1379 struct defsym_list
*next
;
1381 sym
= symbol_new (defsyms
->name
, absolute_section
,
1382 &zero_address_frag
, defsyms
->value
);
1383 /* Make symbols defined on the command line volatile, so that they
1384 can be redefined inside a source file. This makes this assembler's
1385 behaviour compatible with earlier versions, but it may not be
1386 completely intuitive. */
1387 S_SET_VOLATILE (sym
);
1388 symbol_table_insert (sym
);
1389 next
= defsyms
->next
;
1397 perform_an_assembly_pass (argc
, argv
);
1399 cond_finish_check (-1);
1405 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1406 if ((flag_execstack
|| flag_noexecstack
)
1407 && OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
1411 gnustack
= subseg_new (".note.GNU-stack", 0);
1412 bfd_set_section_flags (gnustack
,
1413 SEC_READONLY
| (flag_execstack
? SEC_CODE
: 0));
1418 /* If we've been collecting dwarf2 .debug_line info, either for
1419 assembly debugging or on behalf of the compiler, emit it now. */
1422 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1423 directives from the user or by the backend, emit it now. */
1427 if (seen_at_least_1_file ())
1429 int n_warns
, n_errs
;
1433 write_object_file ();
1435 n_warns
= had_warnings ();
1436 n_errs
= had_errors ();
1439 ngettext ("%d warning", "%d warnings", n_warns
), n_warns
);
1441 ngettext ("%d error", "%d errors", n_errs
), n_errs
);
1442 if (flag_fatal_warnings
&& n_warns
!= 0)
1445 as_bad (_("%s, treating warnings as errors"), warn_msg
);
1451 else if (flag_always_generate_output
)
1453 /* The -Z flag indicates that an object file should be generated,
1454 regardless of warnings and errors. */
1456 fprintf (stderr
, _("%s, %s, generating bad object file\n"),
1464 listing_print (listing_filename
, argv_orig
);
1469 END_PROGRESS (myname
);
1471 /* Use xexit instead of return, because under VMS environments they
1472 may not place the same interpretation on the value given. */
1473 if (had_errors () != 0)
1474 xexit (EXIT_FAILURE
);
1476 /* Only generate dependency file if assembler was successful. */
1477 print_dependencies ();
1479 xexit (EXIT_SUCCESS
);