1 /* as.c - GAS main program.
2 Copyright (C) 1987-2019 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. The default could be overridden
99 by a target during its initialisation, or by the --gdwarf-cie-version
100 command line flag. */
101 int flag_dwarf_cie_version
= 1;
103 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
104 int flag_use_elf_stt_common
= DEFAULT_GENERATE_ELF_STT_COMMON
;
105 bfd_boolean flag_generate_build_notes
= DEFAULT_GENERATE_BUILD_NOTES
;
108 /* Keep the output file. */
109 static int keep_it
= 0;
117 /* Name of listing file. */
118 static char *listing_filename
= NULL
;
120 static struct defsym_list
*defsyms
;
123 /* Keep a record of the itbl files we read in. */
124 struct itbl_file_list
126 struct itbl_file_list
*next
;
129 static struct itbl_file_list
*itbl_files
;
132 static long start_time
;
134 static int flag_macro_alternate
;
137 #ifdef USE_EMULATIONS
138 #define EMULATION_ENVIRON "AS_EMULATION"
140 extern struct emulation mipsbelf
, mipslelf
, mipself
;
141 extern struct emulation i386coff
, i386elf
, i386aout
;
142 extern struct emulation crisaout
, criself
;
144 static struct emulation
*const emulations
[] = { EMULATIONS
};
145 static const int n_emulations
= sizeof (emulations
) / sizeof (emulations
[0]);
148 select_emulation_mode (int argc
, char **argv
)
152 const char *em
= NULL
;
154 for (i
= 1; i
< argc
; i
++)
155 if (!strncmp ("--em", argv
[i
], 4))
161 p
= strchr (argv
[i
], '=');
168 as_fatal (_("missing emulation mode name"));
173 em
= getenv (EMULATION_ENVIRON
);
175 em
= DEFAULT_EMULATION
;
179 for (i
= 0; i
< n_emulations
; i
++)
180 if (!strcmp (emulations
[i
]->name
, em
))
182 if (i
== n_emulations
)
183 as_fatal (_("unrecognized emulation name `%s'"), em
);
184 this_emulation
= emulations
[i
];
187 this_emulation
= emulations
[0];
189 this_emulation
->init ();
193 default_emul_bfd_name (void)
200 common_emul_init (void)
202 this_format
= this_emulation
->format
;
204 if (this_emulation
->leading_underscore
== 2)
205 this_emulation
->leading_underscore
= this_format
->dfl_leading_underscore
;
207 if (this_emulation
->default_endian
!= 2)
208 target_big_endian
= this_emulation
->default_endian
;
210 if (this_emulation
->fake_label_name
== 0)
212 if (this_emulation
->leading_underscore
)
213 this_emulation
->fake_label_name
= FAKE_LABEL_NAME
;
215 /* What other parameters should we test? */
216 this_emulation
->fake_label_name
= "." FAKE_LABEL_NAME
;
222 print_version_id (void)
230 fprintf (stderr
, _("GNU assembler version %s (%s) using BFD version %s\n"),
231 VERSION
, TARGET_ALIAS
, BFD_VERSION_STRING
);
234 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
235 enum compressed_debug_section_type flag_compress_debug
236 = COMPRESS_DEBUG_GABI_ZLIB
;
240 show_usage (FILE * stream
)
242 fprintf (stream
, _("Usage: %s [option...] [asmfile...]\n"), myname
);
244 fprintf (stream
, _("\
246 -a[sub-option...] turn on listings\n\
247 Sub-options [default hls]:\n\
248 c omit false conditionals\n\
249 d omit debugging directives\n\
250 g include general info\n\
251 h include high-level source\n\
252 l include assembly\n\
253 m include macro expansions\n\
254 n omit forms processing\n\
256 =FILE list to FILE (must be last sub-option)\n"));
258 fprintf (stream
, _("\
259 --alternate initially turn on alternate macro syntax\n"));
260 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
261 fprintf (stream
, _("\
262 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
263 compress DWARF debug sections using zlib [default]\n"));
264 fprintf (stream
, _("\
265 --nocompress-debug-sections\n\
266 don't compress DWARF debug sections\n"));
268 fprintf (stream
, _("\
269 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
270 compress DWARF debug sections using zlib\n"));
271 fprintf (stream
, _("\
272 --nocompress-debug-sections\n\
273 don't compress DWARF debug sections [default]\n"));
275 fprintf (stream
, _("\
276 -D produce assembler debugging messages\n"));
277 fprintf (stream
, _("\
278 --debug-prefix-map OLD=NEW\n\
279 map OLD to NEW in debug information\n"));
280 fprintf (stream
, _("\
281 --defsym SYM=VAL define symbol SYM to given value\n"));
282 #ifdef USE_EMULATIONS
289 for (i
= 0; i
< n_emulations
- 1; i
++)
290 fprintf (stream
, "%s | ", emulations
[i
]->name
);
291 fprintf (stream
, "%s]\n", emulations
[i
]->name
);
293 def_em
= getenv (EMULATION_ENVIRON
);
295 def_em
= DEFAULT_EMULATION
;
296 fprintf (stream
, _("\
297 emulate output (default %s)\n"), def_em
);
300 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
301 fprintf (stream
, _("\
302 --execstack require executable stack for this object\n"));
303 fprintf (stream
, _("\
304 --noexecstack don't require executable stack for this object\n"));
305 fprintf (stream
, _("\
306 --size-check=[error|warning]\n\
307 ELF .size directive check (default --size-check=error)\n"));
308 fprintf (stream
, _("\
309 --elf-stt-common=[no|yes] "));
310 if (DEFAULT_GENERATE_ELF_STT_COMMON
)
311 fprintf (stream
, _("(default: yes)\n"));
313 fprintf (stream
, _("(default: no)\n"));
314 fprintf (stream
, _("\
315 generate ELF common symbols with STT_COMMON type\n"));
316 fprintf (stream
, _("\
317 --sectname-subst enable section name substitution sequences\n"));
319 fprintf (stream
, _("\
320 --generate-missing-build-notes=[no|yes] "));
321 #if DEFAULT_GENERATE_BUILD_NOTES
322 fprintf (stream
, _("(default: yes)\n"));
324 fprintf (stream
, _("(default: no)\n"));
326 fprintf (stream
, _("\
327 generate GNU Build notes if none are present in the input\n"));
330 fprintf (stream
, _("\
331 -f skip whitespace and comment preprocessing\n"));
332 fprintf (stream
, _("\
333 -g --gen-debug generate debugging information\n"));
334 fprintf (stream
, _("\
335 --gstabs generate STABS debugging information\n"));
336 fprintf (stream
, _("\
337 --gstabs+ generate STABS debug info with GNU extensions\n"));
338 fprintf (stream
, _("\
339 --gdwarf-2 generate DWARF2 debugging information\n"));
340 fprintf (stream
, _("\
341 --gdwarf-sections generate per-function section names for DWARF line information\n"));
342 fprintf (stream
, _("\
343 --hash-size=<value> set the hash table size close to <value>\n"));
344 fprintf (stream
, _("\
345 --help show this message and exit\n"));
346 fprintf (stream
, _("\
347 --target-help show target specific options\n"));
348 fprintf (stream
, _("\
349 -I DIR add DIR to search list for .include directives\n"));
350 fprintf (stream
, _("\
351 -J don't warn about signed overflow\n"));
352 fprintf (stream
, _("\
353 -K warn when differences altered for long displacements\n"));
354 fprintf (stream
, _("\
355 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
356 fprintf (stream
, _("\
357 -M,--mri assemble in MRI compatibility mode\n"));
358 fprintf (stream
, _("\
359 --MD FILE write dependency information in FILE (default none)\n"));
360 fprintf (stream
, _("\
362 fprintf (stream
, _("\
363 -no-pad-sections do not pad the end of sections to alignment boundaries\n"));
364 fprintf (stream
, _("\
365 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
366 fprintf (stream
, _("\
367 -R fold data section into text section\n"));
368 fprintf (stream
, _("\
369 --reduce-memory-overheads \n\
370 prefer smaller memory use at the cost of longer\n\
372 fprintf (stream
, _("\
373 --statistics print various measured statistics from execution\n"));
374 fprintf (stream
, _("\
375 --strip-local-absolute strip local absolute symbols\n"));
376 fprintf (stream
, _("\
377 --traditional-format Use same format as native assembler when possible\n"));
378 fprintf (stream
, _("\
379 --version print assembler version number and exit\n"));
380 fprintf (stream
, _("\
381 -W --no-warn suppress warnings\n"));
382 fprintf (stream
, _("\
383 --warn don't suppress warnings\n"));
384 fprintf (stream
, _("\
385 --fatal-warnings treat warnings as errors\n"));
387 fprintf (stream
, _("\
388 --itbl INSTTBL extend instruction set to include instructions\n\
389 matching the specifications defined in file INSTTBL\n"));
391 fprintf (stream
, _("\
393 fprintf (stream
, _("\
395 fprintf (stream
, _("\
396 -Z generate object file even after errors\n"));
397 fprintf (stream
, _("\
398 --listing-lhs-width set the width in words of the output data column of\n\
400 fprintf (stream
, _("\
401 --listing-lhs-width2 set the width in words of the continuation lines\n\
402 of the output data column; ignored if smaller than\n\
403 the width of the first line\n"));
404 fprintf (stream
, _("\
405 --listing-rhs-width set the max width in characters of the lines from\n\
406 the source file\n"));
407 fprintf (stream
, _("\
408 --listing-cont-lines set the maximum number of continuation lines used\n\
409 for the output data column of the listing\n"));
410 fprintf (stream
, _("\
411 @FILE read options from FILE\n"));
413 md_show_usage (stream
);
415 fputc ('\n', stream
);
417 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
418 fprintf (stream
, _("Report bugs to %s\n"), REPORT_BUGS_TO
);
421 /* Since it is easy to do here we interpret the special arg "-"
422 to mean "use stdin" and we set that argv[] pointing to "".
423 After we have munged argv[], the only things left are source file
424 name(s) and ""(s) denoting stdin. These file names are used
425 (perhaps more than once) later.
427 check for new machine-dep cmdline options in
428 md_parse_option definitions in config/tc-*.c. */
431 parse_args (int * pargc
, char *** pargv
)
437 /* Starting the short option string with '-' is for programs that
438 expect options and other ARGV-elements in any order and that care about
439 the ordering of the two. We describe each non-option ARGV-element
440 as if it were the argument of an option with character code 1. */
442 extern const char *md_shortopts
;
443 static const char std_shortopts
[] =
446 #ifndef WORKING_DOT_WORD
447 /* -K is not meaningful if .word is not being hacked. */
450 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
452 /* -v takes an argument on VMS, so we don't make it a generic
458 /* New option for extending instruction set (see also --itbl below). */
463 struct option
*longopts
;
464 extern struct option md_longopts
[];
465 extern size_t md_longopts_size
;
466 /* Codes used for the long options with no short synonyms. */
469 OPTION_HELP
= OPTION_STD_BASE
,
476 OPTION_DEBUG_PREFIX_MAP
,
478 OPTION_LISTING_LHS_WIDTH
,
479 OPTION_LISTING_LHS_WIDTH2
,
480 OPTION_LISTING_RHS_WIDTH
,
481 OPTION_LISTING_CONT_LINES
,
486 OPTION_GDWARF_SECTIONS
,
487 OPTION_GDWARF_CIE_VERSION
,
488 OPTION_STRIP_LOCAL_ABSOLUTE
,
489 OPTION_TRADITIONAL_FORMAT
,
495 OPTION_ELF_STT_COMMON
,
496 OPTION_ELF_BUILD_NOTES
,
497 OPTION_SECTNAME_SUBST
,
500 OPTION_HASH_TABLE_SIZE
,
501 OPTION_REDUCE_MEMORY_OVERHEADS
,
503 OPTION_COMPRESS_DEBUG
,
504 OPTION_NOCOMPRESS_DEBUG
,
505 OPTION_NO_PAD_SECTIONS
/* = STD_BASE + 40 */
506 /* When you add options here, check that they do
507 not collide with OPTION_MD_BASE. See as.h. */
510 static const struct option std_longopts
[] =
512 /* Note: commas are placed at the start of the line rather than
513 the end of the preceding line so that it is simpler to
514 selectively add and remove lines from this list. */
515 {"alternate", no_argument
, NULL
, OPTION_ALTERNATE
}
516 /* The entry for "a" is here to prevent getopt_long_only() from
517 considering that -a is an abbreviation for --alternate. This is
518 necessary because -a=<FILE> is a valid switch but getopt would
519 normally reject it since --alternate does not take an argument. */
520 ,{"a", optional_argument
, NULL
, 'a'}
521 /* Handle -al=<FILE>. */
522 ,{"al", optional_argument
, NULL
, OPTION_AL
}
523 ,{"compress-debug-sections", optional_argument
, NULL
, OPTION_COMPRESS_DEBUG
}
524 ,{"nocompress-debug-sections", no_argument
, NULL
, OPTION_NOCOMPRESS_DEBUG
}
525 ,{"debug-prefix-map", required_argument
, NULL
, OPTION_DEBUG_PREFIX_MAP
}
526 ,{"defsym", required_argument
, NULL
, OPTION_DEFSYM
}
527 ,{"dump-config", no_argument
, NULL
, OPTION_DUMPCONFIG
}
528 ,{"emulation", required_argument
, NULL
, OPTION_EMULATION
}
529 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
530 ,{"execstack", no_argument
, NULL
, OPTION_EXECSTACK
}
531 ,{"noexecstack", no_argument
, NULL
, OPTION_NOEXECSTACK
}
532 ,{"size-check", required_argument
, NULL
, OPTION_SIZE_CHECK
}
533 ,{"elf-stt-common", required_argument
, NULL
, OPTION_ELF_STT_COMMON
}
534 ,{"sectname-subst", no_argument
, NULL
, OPTION_SECTNAME_SUBST
}
535 ,{"generate-missing-build-notes", required_argument
, NULL
, OPTION_ELF_BUILD_NOTES
}
537 ,{"fatal-warnings", no_argument
, NULL
, OPTION_WARN_FATAL
}
538 ,{"gdwarf-2", no_argument
, NULL
, OPTION_GDWARF2
}
539 /* GCC uses --gdwarf-2 but GAS uses to use --gdwarf2,
540 so we keep it here for backwards compatibility. */
541 ,{"gdwarf2", no_argument
, NULL
, OPTION_GDWARF2
}
542 ,{"gdwarf-sections", no_argument
, NULL
, OPTION_GDWARF_SECTIONS
}
543 ,{"gdwarf-cie-version", required_argument
, NULL
, OPTION_GDWARF_CIE_VERSION
}
544 ,{"gen-debug", no_argument
, NULL
, 'g'}
545 ,{"gstabs", no_argument
, NULL
, OPTION_GSTABS
}
546 ,{"gstabs+", no_argument
, NULL
, OPTION_GSTABS_PLUS
}
547 ,{"hash-size", required_argument
, NULL
, OPTION_HASH_TABLE_SIZE
}
548 ,{"help", no_argument
, NULL
, OPTION_HELP
}
550 /* New option for extending instruction set (see also -t above).
551 The "-t file" or "--itbl file" option extends the basic set of
552 valid instructions by reading "file", a text file containing a
553 list of instruction formats. The additional opcodes and their
554 formats are added to the built-in set of instructions, and
555 mnemonics for new registers may also be defined. */
556 ,{"itbl", required_argument
, NULL
, 't'}
558 /* getopt allows abbreviations, so we do this to stop it from
559 treating -k as an abbreviation for --keep-locals. Some
560 ports use -k to enable PIC assembly. */
561 ,{"keep-locals", no_argument
, NULL
, 'L'}
562 ,{"keep-locals", no_argument
, NULL
, 'L'}
563 ,{"listing-lhs-width", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH
}
564 ,{"listing-lhs-width2", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH2
}
565 ,{"listing-rhs-width", required_argument
, NULL
, OPTION_LISTING_RHS_WIDTH
}
566 ,{"listing-cont-lines", required_argument
, NULL
, OPTION_LISTING_CONT_LINES
}
567 ,{"MD", required_argument
, NULL
, OPTION_DEPFILE
}
568 ,{"mri", no_argument
, NULL
, 'M'}
569 ,{"nocpp", no_argument
, NULL
, OPTION_NOCPP
}
570 ,{"no-pad-sections", no_argument
, NULL
, OPTION_NO_PAD_SECTIONS
}
571 ,{"no-warn", no_argument
, NULL
, 'W'}
572 ,{"reduce-memory-overheads", no_argument
, NULL
, OPTION_REDUCE_MEMORY_OVERHEADS
}
573 ,{"statistics", no_argument
, NULL
, OPTION_STATISTICS
}
574 ,{"strip-local-absolute", no_argument
, NULL
, OPTION_STRIP_LOCAL_ABSOLUTE
}
575 ,{"version", no_argument
, NULL
, OPTION_VERSION
}
576 ,{"verbose", no_argument
, NULL
, OPTION_VERBOSE
}
577 ,{"target-help", no_argument
, NULL
, OPTION_TARGET_HELP
}
578 ,{"traditional-format", no_argument
, NULL
, OPTION_TRADITIONAL_FORMAT
}
579 ,{"warn", no_argument
, NULL
, OPTION_WARN
}
582 /* Construct the option lists from the standard list and the target
583 dependent list. Include space for an extra NULL option and
584 always NULL terminate. */
585 shortopts
= concat (std_shortopts
, md_shortopts
, (char *) NULL
);
586 longopts
= (struct option
*) xmalloc (sizeof (std_longopts
)
587 + md_longopts_size
+ sizeof (struct option
));
588 memcpy (longopts
, std_longopts
, sizeof (std_longopts
));
589 memcpy (((char *) longopts
) + sizeof (std_longopts
), md_longopts
, md_longopts_size
);
590 memset (((char *) longopts
) + sizeof (std_longopts
) + md_longopts_size
,
591 0, sizeof (struct option
));
593 /* Make a local copy of the old argv. */
597 /* Initialize a new argv that contains no options. */
598 new_argv
= XNEWVEC (char *, old_argc
+ 1);
599 new_argv
[0] = old_argv
[0];
601 new_argv
[new_argc
] = NULL
;
605 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
606 indicate a long option. */
608 int optc
= getopt_long_only (old_argc
, old_argv
, shortopts
, longopts
,
617 /* md_parse_option should return 1 if it recognizes optc,
619 if (md_parse_option (optc
, optarg
) != 0)
621 /* `-v' isn't included in the general short_opts list, so check for
622 it explicitly here before deciding we've gotten a bad argument. */
626 /* Telling getopt to treat -v's value as optional can result
627 in it picking up a following filename argument here. The
628 VMS code in md_parse_option can return 0 in that case,
629 but it has no way of pushing the filename argument back. */
630 if (optarg
&& *optarg
)
631 new_argv
[new_argc
++] = optarg
, new_argv
[new_argc
] = NULL
;
642 as_bad (_("unrecognized option -%c%s"), optc
, optarg
? optarg
: "");
648 case 1: /* File name. */
649 if (!strcmp (optarg
, "-"))
650 optarg
= (char *) "";
651 new_argv
[new_argc
++] = optarg
;
652 new_argv
[new_argc
] = NULL
;
655 case OPTION_TARGET_HELP
:
656 md_show_usage (stdout
);
666 case OPTION_NO_PAD_SECTIONS
:
667 do_not_pad_sections_to_alignment
= 1;
670 case OPTION_STATISTICS
:
671 flag_print_statistics
= 1;
674 case OPTION_STRIP_LOCAL_ABSOLUTE
:
675 flag_strip_local_absolute
= 1;
678 case OPTION_TRADITIONAL_FORMAT
:
679 flag_traditional_format
= 1;
683 /* This output is intended to follow the GNU standards document. */
684 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING
);
685 printf (_("Copyright (C) 2019 Free Software Foundation, Inc.\n"));
687 This program is free software; you may redistribute it under the terms of\n\
688 the GNU General Public License version 3 or later.\n\
689 This program has absolutely no warranty.\n"));
690 #ifdef TARGET_WITH_CPU
691 printf (_("This assembler was configured for a target of `%s' "
692 "and default,\ncpu type `%s'.\n"),
693 TARGET_ALIAS
, TARGET_WITH_CPU
);
695 printf (_("This assembler was configured for a target of `%s'.\n"),
700 case OPTION_EMULATION
:
701 #ifdef USE_EMULATIONS
702 if (strcmp (optarg
, this_emulation
->name
))
703 as_fatal (_("multiple emulation names specified"));
705 as_fatal (_("emulations not handled in this configuration"));
709 case OPTION_DUMPCONFIG
:
710 fprintf (stderr
, _("alias = %s\n"), TARGET_ALIAS
);
711 fprintf (stderr
, _("canonical = %s\n"), TARGET_CANONICAL
);
712 fprintf (stderr
, _("cpu-type = %s\n"), TARGET_CPU
);
713 #ifdef TARGET_OBJ_FORMAT
714 fprintf (stderr
, _("format = %s\n"), TARGET_OBJ_FORMAT
);
717 fprintf (stderr
, _("bfd-target = %s\n"), TARGET_FORMAT
);
721 case OPTION_COMPRESS_DEBUG
:
724 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
725 if (strcasecmp (optarg
, "none") == 0)
726 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
727 else if (strcasecmp (optarg
, "zlib") == 0)
728 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
729 else if (strcasecmp (optarg
, "zlib-gnu") == 0)
730 flag_compress_debug
= COMPRESS_DEBUG_GNU_ZLIB
;
731 else if (strcasecmp (optarg
, "zlib-gabi") == 0)
732 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
734 as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
737 as_fatal (_("--compress-debug-sections=%s is unsupported"),
742 flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB
;
745 case OPTION_NOCOMPRESS_DEBUG
:
746 flag_compress_debug
= COMPRESS_DEBUG_NONE
;
749 case OPTION_DEBUG_PREFIX_MAP
:
750 add_debug_prefix_map (optarg
);
757 struct defsym_list
*n
;
759 for (s
= optarg
; *s
!= '\0' && *s
!= '='; s
++)
762 as_fatal (_("bad defsym; format is --defsym name=value"));
764 i
= bfd_scan_vma (s
, (const char **) NULL
, 0);
765 n
= XNEW (struct defsym_list
);
776 /* optarg is the name of the file containing the instruction
777 formats, opcodes, register names, etc. */
778 struct itbl_file_list
*n
;
782 as_warn (_("no file name following -t option"));
786 n
= XNEW (struct itbl_file_list
);
787 n
->next
= itbl_files
;
791 /* Parse the file and add the new instructions to our internal
792 table. If multiple instruction tables are specified, the
793 information from this table gets appended onto the existing
795 itbl_files
->name
= xstrdup (optarg
);
796 if (itbl_parse (itbl_files
->name
) != 0)
797 as_fatal (_("failed to read instruction table %s\n"),
804 start_dependencies (optarg
);
808 /* Some backends, eg Alpha and Mips, use the -g switch for their
809 own purposes. So we check here for an explicit -g and allow
810 the backend to decide if it wants to process it. */
811 if ( old_argv
[optind
- 1][1] == 'g'
812 && md_parse_option (optc
, optarg
))
815 if (md_debug_format_selector
)
816 debug_type
= md_debug_format_selector (& use_gnu_debug_info_extensions
);
818 debug_type
= DEBUG_DWARF2
;
820 debug_type
= DEBUG_STABS
;
823 case OPTION_GSTABS_PLUS
:
824 use_gnu_debug_info_extensions
= 1;
827 debug_type
= DEBUG_STABS
;
831 debug_type
= DEBUG_DWARF2
;
834 case OPTION_GDWARF_SECTIONS
:
835 flag_dwarf_sections
= TRUE
;
838 case OPTION_GDWARF_CIE_VERSION
:
839 flag_dwarf_cie_version
= atoi (optarg
);
840 /* The available CIE versions are 1 (DWARF 2), 3 (DWARF 3), and 4
842 if (flag_dwarf_cie_version
< 1
843 || flag_dwarf_cie_version
== 2
844 || flag_dwarf_cie_version
> 4)
845 as_fatal (_("Invalid --gdwarf-cie-version `%s'"), optarg
);
849 flag_signed_overflow_ok
= 1;
852 #ifndef WORKING_DOT_WORD
854 flag_warn_displacement
= 1;
858 flag_keep_locals
= 1;
861 case OPTION_LISTING_LHS_WIDTH
:
862 listing_lhs_width
= atoi (optarg
);
863 if (listing_lhs_width_second
< listing_lhs_width
)
864 listing_lhs_width_second
= listing_lhs_width
;
866 case OPTION_LISTING_LHS_WIDTH2
:
868 int tmp
= atoi (optarg
);
870 if (tmp
> listing_lhs_width
)
871 listing_lhs_width_second
= tmp
;
874 case OPTION_LISTING_RHS_WIDTH
:
875 listing_rhs_width
= atoi (optarg
);
877 case OPTION_LISTING_CONT_LINES
:
878 listing_lhs_cont_lines
= atoi (optarg
);
889 flag_readonly_data_in_text
= 1;
893 flag_no_warnings
= 1;
897 flag_no_warnings
= 0;
898 flag_fatal_warnings
= 0;
901 case OPTION_WARN_FATAL
:
902 flag_no_warnings
= 0;
903 flag_fatal_warnings
= 1;
906 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
907 case OPTION_EXECSTACK
:
909 flag_noexecstack
= 0;
912 case OPTION_NOEXECSTACK
:
913 flag_noexecstack
= 1;
917 case OPTION_SIZE_CHECK
:
918 if (strcasecmp (optarg
, "error") == 0)
919 flag_allow_nonconst_size
= FALSE
;
920 else if (strcasecmp (optarg
, "warning") == 0)
921 flag_allow_nonconst_size
= TRUE
;
923 as_fatal (_("Invalid --size-check= option: `%s'"), optarg
);
926 case OPTION_ELF_STT_COMMON
:
927 if (strcasecmp (optarg
, "no") == 0)
928 flag_use_elf_stt_common
= 0;
929 else if (strcasecmp (optarg
, "yes") == 0)
930 flag_use_elf_stt_common
= 1;
932 as_fatal (_("Invalid --elf-stt-common= option: `%s'"),
936 case OPTION_SECTNAME_SUBST
:
937 flag_sectname_subst
= 1;
940 case OPTION_ELF_BUILD_NOTES
:
941 if (strcasecmp (optarg
, "no") == 0)
942 flag_generate_build_notes
= FALSE
;
943 else if (strcasecmp (optarg
, "yes") == 0)
944 flag_generate_build_notes
= TRUE
;
946 as_fatal (_("Invalid --generate-missing-build-notes option: `%s'"),
953 flag_always_generate_output
= 1;
957 listing
|= LISTING_LISTING
;
959 listing_filename
= xstrdup (optarg
);
962 case OPTION_ALTERNATE
:
963 optarg
= old_argv
[optind
- 1];
964 while (* optarg
== '-')
967 if (strcmp (optarg
, "alternate") == 0)
969 flag_macro_alternate
= 1;
978 if (optarg
!= old_argv
[optind
] && optarg
[-1] == '=')
981 if (md_parse_option (optc
, optarg
) != 0)
989 listing
|= LISTING_NOCOND
;
992 listing
|= LISTING_NODEBUG
;
995 listing
|= LISTING_GENERAL
;
998 listing
|= LISTING_HLL
;
1001 listing
|= LISTING_LISTING
;
1004 listing
|= LISTING_MACEXP
;
1007 listing
|= LISTING_NOFORM
;
1010 listing
|= LISTING_SYMBOLS
;
1013 listing_filename
= xstrdup (optarg
+ 1);
1014 optarg
+= strlen (listing_filename
);
1017 as_fatal (_("invalid listing option `%c'"), *optarg
);
1024 listing
= LISTING_DEFAULT
;
1028 /* DEBUG is implemented: it debugs different
1029 things from other people's assemblers. */
1034 flag_no_comments
= 1;
1038 { /* Include file directory. */
1039 char *temp
= xstrdup (optarg
);
1041 add_include_dir (temp
);
1046 out_file_name
= xstrdup (optarg
);
1053 /* -X means treat warnings as errors. */
1056 case OPTION_REDUCE_MEMORY_OVERHEADS
:
1057 /* The only change we make at the moment is to reduce
1058 the size of the hash tables that we use. */
1059 set_gas_hash_table_size (4051);
1062 case OPTION_HASH_TABLE_SIZE
:
1064 unsigned long new_size
;
1066 new_size
= strtoul (optarg
, NULL
, 0);
1068 set_gas_hash_table_size (new_size
);
1070 as_fatal (_("--hash-size needs a numeric argument"));
1082 #ifdef md_after_parse_args
1083 md_after_parse_args ();
1088 dump_statistics (void)
1090 long run_time
= get_run_time () - start_time
;
1092 fprintf (stderr
, _("%s: total time in assembly: %ld.%06ld\n"),
1093 myname
, run_time
/ 1000000, run_time
% 1000000);
1095 subsegs_print_statistics (stderr
);
1096 write_print_statistics (stderr
);
1097 symbol_print_statistics (stderr
);
1098 read_print_statistics (stderr
);
1100 #ifdef tc_print_statistics
1101 tc_print_statistics (stderr
);
1104 #ifdef obj_print_statistics
1105 obj_print_statistics (stderr
);
1110 close_output_file (void)
1112 output_file_close (out_file_name
);
1114 unlink_if_ordinary (out_file_name
);
1117 /* The interface between the macro code and gas expression handling. */
1120 macro_expr (const char *emsg
, size_t idx
, sb
*in
, offsetT
*val
)
1126 temp_ilp (in
->ptr
+ idx
);
1127 expression_and_evaluate (&ex
);
1128 idx
= input_line_pointer
- in
->ptr
;
1131 if (ex
.X_op
!= O_constant
)
1132 as_bad ("%s", emsg
);
1134 *val
= ex
.X_add_number
;
1139 /* Here to attempt 1 pass over each input file.
1140 We scan argv[*] looking for filenames or exactly "" which is
1141 shorthand for stdin. Any argv that is NULL is not a file-name.
1142 We set need_pass_2 TRUE if, after this, we still have unresolved
1143 expressions of the form (unknown value)+-(unknown value).
1145 Note the un*x semantics: there is only 1 logical input file, but it
1146 may be a catenation of many 'physical' input files. */
1149 perform_an_assembly_pass (int argc
, char ** argv
)
1153 flagword applicable
;
1159 /* Create the standard sections, and those the assembler uses
1161 text_section
= subseg_new (TEXT_SECTION_NAME
, 0);
1162 data_section
= subseg_new (DATA_SECTION_NAME
, 0);
1163 bss_section
= subseg_new (BSS_SECTION_NAME
, 0);
1164 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1165 to have relocs, otherwise we don't find out in time. */
1166 applicable
= bfd_applicable_section_flags (stdoutput
);
1167 bfd_set_section_flags (text_section
,
1168 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1169 | SEC_CODE
| SEC_READONLY
));
1170 bfd_set_section_flags (data_section
,
1171 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1173 bfd_set_section_flags (bss_section
, applicable
& SEC_ALLOC
);
1174 seg_info (bss_section
)->bss
= 1;
1176 subseg_new (BFD_ABS_SECTION_NAME
, 0);
1177 subseg_new (BFD_UND_SECTION_NAME
, 0);
1178 reg_section
= subseg_new ("*GAS `reg' section*", 0);
1179 expr_section
= subseg_new ("*GAS `expr' section*", 0);
1182 subseg_set (text_section
, 0);
1185 /* This may add symbol table entries, which requires having an open BFD,
1186 and sections already created. */
1203 { /* Is it a file-name argument? */
1206 /* argv->"" if stdin desired, else->filename. */
1207 read_a_source_file (*argv
);
1209 argv
++; /* Completed that argv. */
1212 read_a_source_file ("");
1217 main (int argc
, char ** argv
)
1219 char ** argv_orig
= argv
;
1224 start_time
= get_run_time ();
1227 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
1228 setlocale (LC_MESSAGES
, "");
1230 #if defined (HAVE_SETLOCALE)
1231 setlocale (LC_CTYPE
, "");
1233 bindtextdomain (PACKAGE
, LOCALEDIR
);
1234 textdomain (PACKAGE
);
1239 #ifdef HOST_SPECIAL_INIT
1240 HOST_SPECIAL_INIT (argc
, argv
);
1244 xmalloc_set_program_name (myname
);
1246 expandargv (&argc
, &argv
);
1248 START_PROGRESS (myname
, 0);
1250 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1251 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1254 out_file_name
= OBJ_DEFAULT_OUTPUT_FILE_NAME
;
1257 if (bfd_init () != BFD_INIT_MAGIC
)
1258 as_fatal (_("libbfd ABI mismatch"));
1259 bfd_set_error_program_name (myname
);
1261 #ifdef USE_EMULATIONS
1262 select_emulation_mode (argc
, argv
);
1266 /* Call parse_args before any of the init/begin functions
1267 so that switches like --hash-size can be honored. */
1268 parse_args (&argc
, &argv
);
1270 if (argc
> 1 && stat (out_file_name
, &sob
) == 0)
1274 for (i
= 1; i
< argc
; ++i
)
1278 /* Check that the input file and output file are different. */
1279 if (stat (argv
[i
], &sib
) == 0
1280 && sib
.st_ino
== sob
.st_ino
1281 /* POSIX emulating systems may support stat() but if the
1282 underlying file system does not support a file serial number
1283 of some kind then they will return 0 for the inode. So
1284 two files with an inode of 0 may not actually be the same.
1285 On real POSIX systems no ordinary file will ever have an
1288 /* Different files may have the same inode number if they
1289 reside on different devices, so check the st_dev field as
1291 && sib
.st_dev
== sob
.st_dev
)
1293 const char *saved_out_file_name
= out_file_name
;
1295 /* Don't let as_fatal remove the output file! */
1296 out_file_name
= NULL
;
1297 as_fatal (_("The input '%s' and output '%s' files are the same"),
1298 argv
[i
], saved_out_file_name
);
1307 input_scrub_begin ();
1310 /* It has to be called after dump_statistics (). */
1311 xatexit (close_output_file
);
1313 if (flag_print_statistics
)
1314 xatexit (dump_statistics
);
1318 macro_strip_at
= flag_mri
;
1321 macro_init (flag_macro_alternate
, flag_mri
, macro_strip_at
, macro_expr
);
1325 output_file_create (out_file_name
);
1326 gas_assert (stdoutput
!= 0);
1330 #ifdef tc_init_after_args
1331 tc_init_after_args ();
1338 local_symbol_make (".gasversion.", absolute_section
,
1339 BFD_VERSION
/ 10000UL, &predefined_address_frag
);
1341 /* Now that we have fully initialized, and have created the output
1342 file, define any symbols requested by --defsym command line
1344 while (defsyms
!= NULL
)
1347 struct defsym_list
*next
;
1349 sym
= symbol_new (defsyms
->name
, absolute_section
, defsyms
->value
,
1350 &zero_address_frag
);
1351 /* Make symbols defined on the command line volatile, so that they
1352 can be redefined inside a source file. This makes this assembler's
1353 behaviour compatible with earlier versions, but it may not be
1354 completely intuitive. */
1355 S_SET_VOLATILE (sym
);
1356 symbol_table_insert (sym
);
1357 next
= defsyms
->next
;
1365 perform_an_assembly_pass (argc
, argv
);
1367 cond_finish_check (-1);
1373 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1374 if ((flag_execstack
|| flag_noexecstack
)
1375 && OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
1379 gnustack
= subseg_new (".note.GNU-stack", 0);
1380 bfd_set_section_flags (gnustack
,
1381 SEC_READONLY
| (flag_execstack
? SEC_CODE
: 0));
1386 /* If we've been collecting dwarf2 .debug_line info, either for
1387 assembly debugging or on behalf of the compiler, emit it now. */
1390 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1391 directives from the user or by the backend, emit it now. */
1395 if (seen_at_least_1_file ())
1397 int n_warns
, n_errs
;
1401 write_object_file ();
1403 n_warns
= had_warnings ();
1404 n_errs
= had_errors ();
1407 ngettext ("%d warning", "%d warnings", n_warns
), n_warns
);
1409 ngettext ("%d error", "%d errors", n_errs
), n_errs
);
1410 if (flag_fatal_warnings
&& n_warns
!= 0)
1413 as_bad (_("%s, treating warnings as errors"), warn_msg
);
1419 else if (flag_always_generate_output
)
1421 /* The -Z flag indicates that an object file should be generated,
1422 regardless of warnings and errors. */
1424 fprintf (stderr
, _("%s, %s, generating bad object file\n"),
1432 listing_print (listing_filename
, argv_orig
);
1437 END_PROGRESS (myname
);
1439 /* Use xexit instead of return, because under VMS environments they
1440 may not place the same interpretation on the value given. */
1441 if (had_errors () != 0)
1442 xexit (EXIT_FAILURE
);
1444 /* Only generate dependency file if assembler was successful. */
1445 print_dependencies ();
1447 xexit (EXIT_SUCCESS
);