1 /* as.c - GAS main program.
2 Copyright (C) 1987, 1990, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000
3 Free Software Foundation, Inc.
5 This file is part of GAS, the GNU Assembler.
7 GAS is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GAS is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GAS; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
22 /* Main program for AS; a 32-bit assembler of GNU.
23 * Understands command arguments.
24 * Has a few routines that don't fit in other modules because they
30 * Since no-one else says they will support them in future: I
31 * don't support them now.
40 #include "output-file.h"
47 #define itbl_parse(itbl_file) 1
52 #ifdef NEED_DECLARATION_SBRK
57 static void show_usage
PARAMS ((FILE *));
58 static void parse_args
PARAMS ((int *, char ***));
59 static void dump_statistics
PARAMS ((void));
60 static void perform_an_assembly_pass
PARAMS ((int argc
, char **argv
));
61 static int macro_expr
PARAMS ((const char *, int, sb
*, int *));
63 /* True if a listing is wanted. */
66 /* Name of listing file. */
67 static char *listing_filename
= NULL
;
69 /* Type of debugging to generate. */
71 enum debug_info_type debug_type
= DEBUG_NONE
;
73 /* Maximum level of macro nesting. */
74 int max_macro_nest
= 100;
79 segT reg_section
, expr_section
;
80 segT text_section
, data_section
, bss_section
;
83 /* The default obstack chunk size. If we set this to zero, the
84 obstack code will use whatever will fit in a 4096 byte block. */
87 /* To monitor memory allocation more effectively, make this non-zero.
88 Then the chunk sizes for gas and bfd will be reduced. */
91 /* We build a list of defsyms as we read the options, and then define
92 them after we have initialized everything. */
96 struct defsym_list
*next
;
101 static struct defsym_list
*defsyms
;
103 /* Keep a record of the itbl files we read in. */
105 struct itbl_file_list
107 struct itbl_file_list
*next
;
111 static struct itbl_file_list
*itbl_files
;
113 #ifdef USE_EMULATIONS
114 #define EMULATION_ENVIRON "AS_EMULATION"
116 extern struct emulation mipsbelf
, mipslelf
, mipself
;
117 extern struct emulation mipsbecoff
, mipslecoff
, mipsecoff
;
118 extern struct emulation i386coff
, i386elf
, i386aout
;
119 extern struct emulation crisaout
, criself
;
121 static struct emulation
*const emulations
[] = { EMULATIONS
};
122 static const int n_emulations
= sizeof (emulations
) / sizeof (emulations
[0]);
124 static void select_emulation_mode
PARAMS ((int, char **));
127 select_emulation_mode (argc
, argv
)
134 for (i
= 1; i
< argc
; i
++)
135 if (!strncmp ("--em", argv
[i
], 4))
141 p
= strchr (argv
[i
], '=');
148 as_fatal (_("missing emulation mode name"));
153 em
= getenv (EMULATION_ENVIRON
);
155 em
= DEFAULT_EMULATION
;
159 for (i
= 0; i
< n_emulations
; i
++)
160 if (!strcmp (emulations
[i
]->name
, em
))
162 if (i
== n_emulations
)
163 as_fatal (_("unrecognized emulation name `%s'"), em
);
164 this_emulation
= emulations
[i
];
167 this_emulation
= emulations
[0];
169 this_emulation
->init ();
173 default_emul_bfd_name ()
182 this_format
= this_emulation
->format
;
184 if (this_emulation
->leading_underscore
== 2)
185 this_emulation
->leading_underscore
= this_format
->dfl_leading_underscore
;
187 if (this_emulation
->default_endian
!= 2)
188 target_big_endian
= this_emulation
->default_endian
;
190 if (this_emulation
->fake_label_name
== 0)
192 if (this_emulation
->leading_underscore
)
193 this_emulation
->fake_label_name
= "L0\001";
195 /* What other parameters should we test? */
196 this_emulation
->fake_label_name
= ".L0\001";
210 fprintf (stderr
, _("GNU assembler version %s (%s) using BFD version %s"),
211 VERSION
, TARGET_ALIAS
, BFD_VERSION
);
213 fprintf (stderr
, _("GNU assembler version %s (%s)"), VERSION
, TARGET_ALIAS
);
215 fprintf (stderr
, "\n");
222 fprintf (stream
, _("Usage: %s [option...] [asmfile...]\n"), myname
);
224 fprintf (stream
, _("\
226 -a[sub-option...] turn on listings\n\
227 Sub-options [default hls]:\n\
228 c omit false conditionals\n\
229 d omit debugging directives\n\
230 h include high-level source\n\
231 l include assembly\n\
232 m include macro expansions\n\
233 n omit forms processing\n\
235 L include line debug statistics (if applicable)\n\
236 =FILE list to FILE (must be last sub-option)\n"));
238 fprintf (stream
, _("\
239 -D produce assembler debugging messages\n"));
240 fprintf (stream
, _("\
241 --defsym SYM=VAL define symbol SYM to given value\n"));
242 #ifdef USE_EMULATIONS
249 for (i
= 0; i
< n_emulations
- 1; i
++)
250 fprintf (stream
, "%s | ", emulations
[i
]->name
);
251 fprintf (stream
, "%s]\n", emulations
[i
]->name
);
253 def_em
= getenv (EMULATION_ENVIRON
);
255 def_em
= DEFAULT_EMULATION
;
256 fprintf (stream
, _("\
257 emulate output (default %s)\n"), def_em
);
260 fprintf (stream
, _("\
261 -f skip whitespace and comment preprocessing\n"));
262 fprintf (stream
, _("\
263 --gstabs generate stabs debugging information\n"));
264 fprintf (stream
, _("\
265 --gdwarf2 generate DWARF2 debugging information\n"));
266 fprintf (stream
, _("\
267 --help show this message and exit\n"));
268 fprintf (stream
, _("\
269 -I DIR add DIR to search list for .include directives\n"));
270 fprintf (stream
, _("\
271 -J don't warn about signed overflow\n"));
272 fprintf (stream
, _("\
273 -K warn when differences altered for long displacements\n"));
274 fprintf (stream
, _("\
275 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
276 fprintf (stream
, _("\
277 -M,--mri assemble in MRI compatibility mode\n"));
278 fprintf (stream
, _("\
279 --MD FILE write dependency information in FILE (default none)\n"));
280 fprintf (stream
, _("\
282 fprintf (stream
, _("\
283 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
284 fprintf (stream
, _("\
285 -R fold data section into text section\n"));
286 fprintf (stream
, _("\
287 --statistics print various measured statistics from execution\n"));
288 fprintf (stream
, _("\
289 --strip-local-absolute strip local absolute symbols\n"));
290 fprintf (stream
, _("\
291 --traditional-format Use same format as native assembler when possible\n"));
292 fprintf (stream
, _("\
293 --version print assembler version number and exit\n"));
294 fprintf (stream
, _("\
295 -W --no-warn suppress warnings\n"));
296 fprintf (stream
, _("\
297 --warn don't suppress warnings\n"));
298 fprintf (stream
, _("\
299 --fatal-warnings treat warnings as errors\n"));
300 fprintf (stream
, _("\
301 --itbl INSTTBL extend instruction set to include instructions\n\
302 matching the specifications defined in file INSTTBL\n"));
303 fprintf (stream
, _("\
305 fprintf (stream
, _("\
307 fprintf (stream
, _("\
308 -Z generate object file even after errors\n"));
309 fprintf (stream
, _("\
310 --listing-lhs-width set the width in words of the output data column of\n\
312 fprintf (stream
, _("\
313 --listing-lhs-width2 set the width in words of the continuation lines\n\
314 of the output data column; ignored if smaller than\n\
315 the width of the first line\n"));
316 fprintf (stream
, _("\
317 --listing-rhs-width set the max width in characters of the lines from\n\
318 the source file\n"));
319 fprintf (stream
, _("\
320 --listing-cont-lines set the maximum number of continuation lines used\n\
321 for the output data column of the listing\n"));
323 md_show_usage (stream
);
325 fputc ('\n', stream
);
326 fprintf (stream
, _("Report bugs to %s\n"), REPORT_BUGS_TO
);
329 /* Since it is easy to do here we interpret the special arg "-"
330 to mean "use stdin" and we set that argv[] pointing to "".
331 After we have munged argv[], the only things left are source file
332 name(s) and ""(s) denoting stdin. These file names are used
333 (perhaps more than once) later.
335 check for new machine-dep cmdline options in
336 md_parse_option definitions in config/tc-*.c. */
339 parse_args (pargc
, pargv
)
343 int old_argc
, new_argc
;
344 char **old_argv
, **new_argv
;
346 /* Starting the short option string with '-' is for programs that
347 expect options and other ARGV-elements in any order and that care about
348 the ordering of the two. We describe each non-option ARGV-element
349 as if it were the argument of an option with character code 1. */
352 extern CONST
char *md_shortopts
;
353 static const char std_shortopts
[] =
356 #ifndef WORKING_DOT_WORD
357 /* -K is not meaningful if .word is not being hacked. */
360 'L', 'M', 'R', 'W', 'Z', 'f', 'a', ':', ':', 'D', 'I', ':', 'o', ':',
362 /* -v takes an argument on VMS, so we don't make it a generic
367 /* New option for extending instruction set (see also --itbl below) */
371 struct option
*longopts
;
372 extern struct option md_longopts
[];
373 extern size_t md_longopts_size
;
374 static const struct option std_longopts
[] = {
375 #define OPTION_HELP (OPTION_STD_BASE)
376 {"help", no_argument
, NULL
, OPTION_HELP
},
377 {"keep-locals", no_argument
, NULL
, 'L'},
378 {"mri", no_argument
, NULL
, 'M'},
379 #define OPTION_NOCPP (OPTION_STD_BASE + 1)
380 {"nocpp", no_argument
, NULL
, OPTION_NOCPP
},
381 #define OPTION_STATISTICS (OPTION_STD_BASE + 2)
382 {"statistics", no_argument
, NULL
, OPTION_STATISTICS
},
383 #define OPTION_VERSION (OPTION_STD_BASE + 3)
384 {"version", no_argument
, NULL
, OPTION_VERSION
},
385 #define OPTION_DUMPCONFIG (OPTION_STD_BASE + 4)
386 {"dump-config", no_argument
, NULL
, OPTION_DUMPCONFIG
},
387 #define OPTION_VERBOSE (OPTION_STD_BASE + 5)
388 {"verbose", no_argument
, NULL
, OPTION_VERBOSE
},
389 #define OPTION_EMULATION (OPTION_STD_BASE + 6)
390 {"emulation", required_argument
, NULL
, OPTION_EMULATION
},
391 #define OPTION_DEFSYM (OPTION_STD_BASE + 7)
392 {"defsym", required_argument
, NULL
, OPTION_DEFSYM
},
393 #define OPTION_INSTTBL (OPTION_STD_BASE + 8)
394 /* New option for extending instruction set (see also -t above).
395 The "-t file" or "--itbl file" option extends the basic set of
396 valid instructions by reading "file", a text file containing a
397 list of instruction formats. The additional opcodes and their
398 formats are added to the built-in set of instructions, and
399 mnemonics for new registers may also be defined. */
400 {"itbl", required_argument
, NULL
, OPTION_INSTTBL
},
401 #define OPTION_LISTING_LHS_WIDTH (OPTION_STD_BASE + 9)
402 {"listing-lhs-width", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH
},
403 #define OPTION_LISTING_LHS_WIDTH2 (OPTION_STD_BASE + 10)
404 {"listing-lhs-width", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH2
},
405 #define OPTION_LISTING_RHS_WIDTH (OPTION_STD_BASE + 11)
406 {"listing-rhs-width", required_argument
, NULL
, OPTION_LISTING_RHS_WIDTH
},
407 #define OPTION_LISTING_CONT_LINES (OPTION_STD_BASE + 12)
408 {"listing-cont-lines", required_argument
, NULL
, OPTION_LISTING_CONT_LINES
},
409 #define OPTION_DEPFILE (OPTION_STD_BASE + 13)
410 {"MD", required_argument
, NULL
, OPTION_DEPFILE
},
411 #define OPTION_GSTABS (OPTION_STD_BASE + 14)
412 {"gstabs", no_argument
, NULL
, OPTION_GSTABS
},
413 #define OPTION_STRIP_LOCAL_ABSOLUTE (OPTION_STD_BASE + 15)
414 {"strip-local-absolute", no_argument
, NULL
, OPTION_STRIP_LOCAL_ABSOLUTE
},
415 #define OPTION_TRADITIONAL_FORMAT (OPTION_STD_BASE + 16)
416 {"traditional-format", no_argument
, NULL
, OPTION_TRADITIONAL_FORMAT
},
417 #define OPTION_GDWARF2 (OPTION_STD_BASE + 17)
418 {"gdwarf2", no_argument
, NULL
, OPTION_GDWARF2
},
419 {"no-warn", no_argument
, NULL
, 'W'},
420 #define OPTION_WARN (OPTION_STD_BASE + 18)
421 {"warn", no_argument
, NULL
, OPTION_WARN
},
422 #define OPTION_WARN_FATAL (OPTION_STD_BASE + 19)
423 {"fatal-warnings", no_argument
, NULL
, OPTION_WARN_FATAL
}
426 /* Construct the option lists from the standard list and the target
427 dependent list. Include space for an extra NULL option and
428 always NULL terminate. */
429 shortopts
= concat (std_shortopts
, md_shortopts
, (char *) NULL
);
430 longopts
= (struct option
*) xmalloc (sizeof (std_longopts
)
432 + sizeof (struct option
));
433 memcpy (longopts
, std_longopts
, sizeof (std_longopts
));
434 memcpy ((char *) longopts
+ sizeof (std_longopts
),
435 md_longopts
, md_longopts_size
);
436 memset ((char *) longopts
+ sizeof (std_longopts
) + md_longopts_size
,
437 0, sizeof (struct option
));
439 /* Make a local copy of the old argv. */
443 /* Initialize a new argv that contains no options. */
444 new_argv
= (char **) xmalloc (sizeof (char *) * (old_argc
+ 1));
445 new_argv
[0] = old_argv
[0];
447 new_argv
[new_argc
] = NULL
;
451 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
452 indicate a long option. */
454 int optc
= getopt_long_only (old_argc
, old_argv
, shortopts
, longopts
,
463 /* md_parse_option should return 1 if it recognizes optc,
465 if (md_parse_option (optc
, optarg
) != 0)
467 /* `-v' isn't included in the general short_opts list, so check for
468 it explicity here before deciding we've gotten a bad argument. */
472 /* Telling getopt to treat -v's value as optional can result
473 in it picking up a following filename argument here. The
474 VMS code in md_parse_option can return 0 in that case,
475 but it has no way of pushing the filename argument back. */
476 if (optarg
&& *optarg
)
477 new_argv
[new_argc
++] = optarg
, new_argv
[new_argc
] = NULL
;
491 case 1: /* File name. */
492 if (!strcmp (optarg
, "-"))
494 new_argv
[new_argc
++] = optarg
;
495 new_argv
[new_argc
] = NULL
;
505 case OPTION_STATISTICS
:
506 flag_print_statistics
= 1;
509 case OPTION_STRIP_LOCAL_ABSOLUTE
:
510 flag_strip_local_absolute
= 1;
513 case OPTION_TRADITIONAL_FORMAT
:
514 flag_traditional_format
= 1;
518 /* This output is intended to follow the GNU standards document. */
519 printf (_("GNU assembler %s\n"), VERSION
);
520 printf (_("Copyright 2000 Free Software Foundation, Inc.\n"));
522 This program is free software; you may redistribute it under the terms of\n\
523 the GNU General Public License. This program has absolutely no warranty.\n"));
524 printf (_("This assembler was configured for a target of `%s'.\n"),
528 case OPTION_EMULATION
:
529 #ifdef USE_EMULATIONS
530 if (strcmp (optarg
, this_emulation
->name
))
531 as_fatal (_("multiple emulation names specified"));
533 as_fatal (_("emulations not handled in this configuration"));
537 case OPTION_DUMPCONFIG
:
538 fprintf (stderr
, _("alias = %s\n"), TARGET_ALIAS
);
539 fprintf (stderr
, _("canonical = %s\n"), TARGET_CANONICAL
);
540 fprintf (stderr
, _("cpu-type = %s\n"), TARGET_CPU
);
541 #ifdef TARGET_OBJ_FORMAT
542 fprintf (stderr
, _("format = %s\n"), TARGET_OBJ_FORMAT
);
545 fprintf (stderr
, _("bfd-target = %s\n"), TARGET_FORMAT
);
553 struct defsym_list
*n
;
555 for (s
= optarg
; *s
!= '\0' && *s
!= '='; s
++)
558 as_fatal (_("bad defsym; format is --defsym name=value"));
561 i
= bfd_scan_vma (s
, (const char **) NULL
, 0);
563 i
= strtol (s
, (char **) NULL
, 0);
565 n
= (struct defsym_list
*) xmalloc (sizeof *n
);
576 /* optarg is the name of the file containing the instruction
577 formats, opcodes, register names, etc. */
578 struct itbl_file_list
*n
;
582 as_warn (_("No file name following -t option\n"));
586 n
= (struct itbl_file_list
*) xmalloc (sizeof *n
);
587 n
->next
= itbl_files
;
591 /* Parse the file and add the new instructions to our internal
592 table. If multiple instruction tables are specified, the
593 information from this table gets appended onto the existing
595 itbl_files
->name
= xstrdup (optarg
);
596 if (itbl_parse (itbl_files
->name
) != 0)
598 fprintf (stderr
, _("Failed to read instruction table %s\n"),
606 start_dependencies (optarg
);
610 debug_type
= DEBUG_STABS
;
614 debug_type
= DEBUG_DWARF2
;
618 flag_signed_overflow_ok
= 1;
621 #ifndef WORKING_DOT_WORD
623 flag_warn_displacement
= 1;
628 flag_keep_locals
= 1;
631 case OPTION_LISTING_LHS_WIDTH
:
632 listing_lhs_width
= atoi (optarg
);
633 if (listing_lhs_width_second
< listing_lhs_width
)
634 listing_lhs_width_second
= listing_lhs_width
;
636 case OPTION_LISTING_LHS_WIDTH2
:
638 int tmp
= atoi (optarg
);
639 if (tmp
> listing_lhs_width
)
640 listing_lhs_width_second
= tmp
;
643 case OPTION_LISTING_RHS_WIDTH
:
644 listing_rhs_width
= atoi (optarg
);
646 case OPTION_LISTING_CONT_LINES
:
647 listing_lhs_cont_lines
= atoi (optarg
);
658 flag_readonly_data_in_text
= 1;
662 flag_no_warnings
= 1;
666 flag_no_warnings
= 0;
667 flag_fatal_warnings
= 0;
670 case OPTION_WARN_FATAL
:
671 flag_no_warnings
= 0;
672 flag_fatal_warnings
= 1;
676 flag_always_generate_output
= 1;
682 if (md_parse_option (optc
, optarg
) != 0)
690 listing
|= LISTING_NOCOND
;
693 listing
|= LISTING_NODEBUG
;
696 listing
|= LISTING_HLL
;
699 listing
|= LISTING_LISTING
;
702 listing
|= LISTING_MACEXP
;
705 listing
|= LISTING_NOFORM
;
708 listing
|= LISTING_SYMBOLS
;
711 listing_filename
= xstrdup (optarg
+ 1);
712 optarg
+= strlen (listing_filename
);
715 as_fatal (_("invalid listing option `%c'"), *optarg
);
722 listing
= LISTING_DEFAULT
;
726 /* DEBUG is implemented: it debugs different
727 things from other people's assemblers. */
732 flag_no_comments
= 1;
736 { /* Include file directory. */
737 char *temp
= xstrdup (optarg
);
738 add_include_dir (temp
);
743 out_file_name
= xstrdup (optarg
);
750 /* -X means treat warnings as errors. */
762 static long start_time
;
773 start_time
= get_run_time ();
775 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
776 setlocale (LC_MESSAGES
, "");
778 bindtextdomain (PACKAGE
, LOCALEDIR
);
779 textdomain (PACKAGE
);
784 extern long _bfd_chunksize
;
790 #ifdef HOST_SPECIAL_INIT
791 HOST_SPECIAL_INIT (argc
, argv
);
795 xmalloc_set_program_name (myname
);
797 START_PROGRESS (myname
, 0);
799 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
800 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
803 out_file_name
= OBJ_DEFAULT_OUTPUT_FILE_NAME
;
808 bfd_set_error_program_name (myname
);
811 #ifdef USE_EMULATIONS
812 select_emulation_mode (argc
, argv
);
819 parse_args (&argc
, &argv
);
821 input_scrub_begin ();
824 if (flag_print_statistics
)
825 xatexit (dump_statistics
);
830 macro_strip_at
= flag_mri
;
833 /* For compatibility with the AMD 29K family macro assembler
839 macro_init (macro_alternate
, flag_mri
, macro_strip_at
, macro_expr
);
844 output_file_create (out_file_name
);
845 assert (stdoutput
!= 0);
848 #ifdef tc_init_after_args
849 tc_init_after_args ();
854 /* Now that we have fully initialized, and have created the output
855 file, define any symbols requested by --defsym command line
857 while (defsyms
!= NULL
)
860 struct defsym_list
*next
;
862 sym
= symbol_new (defsyms
->name
, absolute_section
, defsyms
->value
,
864 symbol_table_insert (sym
);
865 next
= defsyms
->next
;
873 perform_an_assembly_pass (argc
, argv
);
875 cond_finish_check (-1);
881 if (seen_at_least_1_file ()
882 && (flag_always_generate_output
|| had_errors () == 0))
887 #if defined (BFD_ASSEMBLER) || !defined (BFD)
888 /* This used to be done at the start of write_object_file in
889 write.c, but that caused problems when doing listings when
890 keep_it was zero. This could probably be moved above md_end, but
891 I didn't want to risk the change. */
896 write_object_file ();
899 listing_print (listing_filename
);
902 #ifndef OBJ_VMS /* does its own file handling */
903 #ifndef BFD_ASSEMBLER
906 output_file_close (out_file_name
);
909 if (flag_fatal_warnings
&& had_warnings () > 0 && had_errors () == 0)
910 as_bad (_("%d warnings, treating warnings as errors"), had_warnings ());
912 if (had_errors () > 0 && ! flag_always_generate_output
)
916 unlink (out_file_name
);
920 END_PROGRESS (myname
);
922 /* Use xexit instead of return, because under VMS environments they
923 may not place the same interpretation on the value given. */
924 if (had_errors () > 0)
925 xexit (EXIT_FAILURE
);
927 /* Only generate dependency file if assembler was successful. */
928 print_dependencies ();
930 xexit (EXIT_SUCCESS
);
937 char *lim
= (char *) sbrk (0);
939 long run_time
= get_run_time () - start_time
;
941 fprintf (stderr
, _("%s: total time in assembly: %ld.%06ld\n"),
942 myname
, run_time
/ 1000000, run_time
% 1000000);
944 fprintf (stderr
, _("%s: data size %ld\n"),
945 myname
, (long) (lim
- (char *) &environ
));
948 subsegs_print_statistics (stderr
);
949 write_print_statistics (stderr
);
950 symbol_print_statistics (stderr
);
951 read_print_statistics (stderr
);
953 #ifdef tc_print_statistics
954 tc_print_statistics (stderr
);
956 #ifdef obj_print_statistics
957 obj_print_statistics (stderr
);
961 /* Here to attempt 1 pass over each input file.
962 We scan argv[*] looking for filenames or exactly "" which is
963 shorthand for stdin. Any argv that is NULL is not a file-name.
964 We set need_pass_2 TRUE if, after this, we still have unresolved
965 expressions of the form (unknown value)+-(unknown value).
967 Note the un*x semantics: there is only 1 logical input file, but it
968 may be a catenation of many 'physical' input files. */
971 perform_an_assembly_pass (argc
, argv
)
982 #ifndef BFD_ASSEMBLER
986 for (i
= SEG_E0
; i
< SEG_UNKNOWN
; i
++)
987 segment_info
[i
].fix_root
= 0;
989 /* Create the three fixed ones. */
994 seg
= subseg_new (".wtext", 0);
996 seg
= subseg_new (".text", 0);
998 assert (seg
== SEG_E0
);
999 seg
= subseg_new (".data", 0);
1000 assert (seg
== SEG_E1
);
1001 seg
= subseg_new (".bss", 0);
1002 assert (seg
== SEG_E2
);
1004 create_target_segments ();
1008 #else /* not MANY_SEGMENTS */
1009 text_fix_root
= NULL
;
1010 data_fix_root
= NULL
;
1011 bss_fix_root
= NULL
;
1012 #endif /* not MANY_SEGMENTS */
1013 #else /* BFD_ASSEMBLER */
1014 /* Create the standard sections, and those the assembler uses
1016 text_section
= subseg_new (TEXT_SECTION_NAME
, 0);
1017 data_section
= subseg_new (DATA_SECTION_NAME
, 0);
1018 bss_section
= subseg_new (BSS_SECTION_NAME
, 0);
1019 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1020 to have relocs, otherwise we don't find out in time. */
1021 applicable
= bfd_applicable_section_flags (stdoutput
);
1022 bfd_set_section_flags (stdoutput
, text_section
,
1023 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1024 | SEC_CODE
| SEC_READONLY
));
1025 bfd_set_section_flags (stdoutput
, data_section
,
1026 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1028 bfd_set_section_flags (stdoutput
, bss_section
, applicable
& SEC_ALLOC
);
1029 seg_info (bss_section
)->bss
= 1;
1030 subseg_new (BFD_ABS_SECTION_NAME
, 0);
1031 subseg_new (BFD_UND_SECTION_NAME
, 0);
1032 reg_section
= subseg_new ("*GAS `reg' section*", 0);
1033 expr_section
= subseg_new ("*GAS `expr' section*", 0);
1035 #endif /* BFD_ASSEMBLER */
1037 subseg_set (text_section
, 0);
1039 /* This may add symbol table entries, which requires having an open BFD,
1040 and sections already created, in BFD_ASSEMBLER mode. */
1054 { /* Is it a file-name argument? */
1057 /* argv->"" if stdin desired, else->filename */
1058 read_a_source_file (*argv
);
1060 argv
++; /* completed that argv */
1063 read_a_source_file ("");
1066 /* The interface between the macro code and gas expression handling. */
1069 macro_expr (emsg
, idx
, in
, val
)
1080 hold
= input_line_pointer
;
1081 input_line_pointer
= in
->ptr
+ idx
;
1083 idx
= input_line_pointer
- in
->ptr
;
1084 input_line_pointer
= hold
;
1086 if (ex
.X_op
!= O_constant
)
1087 as_bad ("%s", emsg
);
1089 *val
= (int) ex
.X_add_number
;