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
23 * Main program for AS; a 32-bit assembler of GNU.
24 * Understands command arguments.
25 * Has a few routines that don't fit in other modules because they
32 * Since no-one else says they will support them in future: I
33 * don't support them now.
43 #include "output-file.h"
50 #define itbl_parse(itbl_file) 1
55 #ifdef NEED_DECLARATION_SBRK
60 static void show_usage
PARAMS ((FILE *));
61 static void parse_args
PARAMS ((int *, char ***));
62 static void dump_statistics
PARAMS ((void));
63 static void perform_an_assembly_pass
PARAMS ((int argc
, char **argv
));
64 static int macro_expr
PARAMS ((const char *, int, sb
*, int *));
66 int listing
; /* true if a listing is wanted */
68 static char *listing_filename
= NULL
; /* Name of listing file. */
70 /* Type of debugging to generate. */
72 enum debug_info_type debug_type
= DEBUG_NONE
;
74 /* Maximum level of macro nesting. */
76 int max_macro_nest
= 100;
78 char *myname
; /* argv[0] */
80 segT reg_section
, expr_section
;
81 segT text_section
, data_section
, bss_section
;
84 /* The default obstack chunk size. If we set this to zero, the
85 obstack code will use whatever will fit in a 4096 byte block. */
88 /* To monitor memory allocation more effectively, make this non-zero.
89 Then the chunk sizes for gas and bfd will be reduced. */
92 /* We build a list of defsyms as we read the options, and then define
93 them after we have initialized everything. */
97 struct defsym_list
*next
;
102 static struct defsym_list
*defsyms
;
104 /* Keep a record of the itbl files we read in. */
106 struct itbl_file_list
108 struct itbl_file_list
*next
;
112 static struct itbl_file_list
*itbl_files
;
114 #ifdef USE_EMULATIONS
115 #define EMULATION_ENVIRON "AS_EMULATION"
117 extern struct emulation mipsbelf
, mipslelf
, mipself
;
118 extern struct emulation mipsbecoff
, mipslecoff
, mipsecoff
;
119 extern struct emulation i386coff
, i386elf
, i386aout
;
120 extern struct emulation crisaout
, criself
;
122 static struct emulation
*const emulations
[] = { EMULATIONS
};
123 static const int n_emulations
= sizeof (emulations
) / sizeof (emulations
[0]);
125 static void select_emulation_mode
PARAMS ((int, char **));
128 select_emulation_mode (argc
, argv
)
135 for (i
= 1; i
< argc
; i
++)
136 if (!strncmp ("--em", argv
[i
], 4))
142 p
= strchr (argv
[i
], '=');
149 as_fatal (_("missing emulation mode name"));
154 em
= getenv (EMULATION_ENVIRON
);
156 em
= DEFAULT_EMULATION
;
160 for (i
= 0; i
< n_emulations
; i
++)
161 if (!strcmp (emulations
[i
]->name
, em
))
163 if (i
== n_emulations
)
164 as_fatal (_("unrecognized emulation name `%s'"), em
);
165 this_emulation
= emulations
[i
];
168 this_emulation
= emulations
[0];
170 this_emulation
->init ();
174 default_emul_bfd_name ()
183 this_format
= this_emulation
->format
;
185 if (this_emulation
->leading_underscore
== 2)
186 this_emulation
->leading_underscore
= this_format
->dfl_leading_underscore
;
188 if (this_emulation
->default_endian
!= 2)
189 target_big_endian
= this_emulation
->default_endian
;
191 if (this_emulation
->fake_label_name
== 0)
193 if (this_emulation
->leading_underscore
)
194 this_emulation
->fake_label_name
= "L0\001";
196 /* What other parameters should we test? */
197 this_emulation
->fake_label_name
= ".L0\001";
211 fprintf (stderr
, _("GNU assembler version %s (%s) using BFD version %s"),
212 VERSION
, TARGET_ALIAS
, BFD_VERSION
);
214 fprintf (stderr
, _("GNU assembler version %s (%s)"), VERSION
, TARGET_ALIAS
);
216 fprintf (stderr
, "\n");
223 fprintf (stream
, _("Usage: %s [option...] [asmfile...]\n"), myname
);
225 fprintf (stream
, _("\
227 -a[sub-option...] turn on listings\n\
228 Sub-options [default hls]:\n\
229 c omit false conditionals\n\
230 d omit debugging directives\n\
231 h include high-level source\n\
232 l include assembly\n\
233 m include macro expansions\n\
234 n omit forms processing\n\
236 L include line debug statistics (if applicable)\n\
237 =FILE list to FILE (must be last sub-option)\n"));
239 fprintf (stream
, _("\
240 -D produce assembler debugging messages\n"));
241 fprintf (stream
, _("\
242 --defsym SYM=VAL define symbol SYM to given value\n"));
243 #ifdef USE_EMULATIONS
250 for (i
= 0; i
< n_emulations
-1; i
++)
251 fprintf (stream
, "%s | ", emulations
[i
]->name
);
252 fprintf (stream
, "%s]\n", emulations
[i
]->name
);
254 def_em
= getenv (EMULATION_ENVIRON
);
256 def_em
= DEFAULT_EMULATION
;
257 fprintf (stream
, _("\
258 emulate output (default %s)\n"), def_em
);
261 fprintf (stream
, _("\
262 -f skip whitespace and comment preprocessing\n"));
263 fprintf (stream
, _("\
264 --gstabs generate stabs debugging information\n"));
265 fprintf (stream
, _("\
266 --gdwarf2 generate DWARF2 debugging information\n"));
267 fprintf (stream
, _("\
268 --help show this message and exit\n"));
269 fprintf (stream
, _("\
270 -I DIR add DIR to search list for .include directives\n"));
271 fprintf (stream
, _("\
272 -J don't warn about signed overflow\n"));
273 fprintf (stream
, _("\
274 -K warn when differences altered for long displacements\n"));
275 fprintf (stream
, _("\
276 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
277 fprintf (stream
, _("\
278 -M,--mri assemble in MRI compatibility mode\n"));
279 fprintf (stream
, _("\
280 --MD FILE write dependency information in FILE (default none)\n"));
281 fprintf (stream
, _("\
283 fprintf (stream
, _("\
284 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
285 fprintf (stream
, _("\
286 -R fold data section into text section\n"));
287 fprintf (stream
, _("\
288 --statistics print various measured statistics from execution\n"));
289 fprintf (stream
, _("\
290 --strip-local-absolute strip local absolute symbols\n"));
291 fprintf (stream
, _("\
292 --traditional-format Use same format as native assembler when possible\n"));
293 fprintf (stream
, _("\
294 --version print assembler version number and exit\n"));
295 fprintf (stream
, _("\
296 -W --no-warn suppress warnings\n"));
297 fprintf (stream
, _("\
298 --warn don't suppress warnings\n"));
299 fprintf (stream
, _("\
300 --fatal-warnings treat warnings as errors\n"));
301 fprintf (stream
, _("\
302 --itbl INSTTBL extend instruction set to include instructions\n\
303 matching the specifications defined in file INSTTBL\n"));
304 fprintf (stream
, _("\
306 fprintf (stream
, _("\
308 fprintf (stream
, _("\
309 -Z generate object file even after errors\n"));
310 fprintf (stream
, _("\
311 --listing-lhs-width set the width in words of the output data column of\n\
313 fprintf (stream
, _("\
314 --listing-lhs-width2 set the width in words of the continuation lines\n\
315 of the output data column; ignored if smaller than\n\
316 the width of the first line\n"));
317 fprintf (stream
, _("\
318 --listing-rhs-width set the max width in characters of the lines from\n\
319 the source file\n"));
320 fprintf (stream
, _("\
321 --listing-cont-lines set the maximum number of continuation lines used\n\
322 for the output data column of the listing\n"));
324 md_show_usage (stream
);
326 fputc ('\n', stream
);
327 fprintf (stream
, _("Report bugs to %s\n"), REPORT_BUGS_TO
);
331 * Since it is easy to do here we interpret the special arg "-"
332 * to mean "use stdin" and we set that argv[] pointing to "".
333 * After we have munged argv[], the only things left are source file
334 * name(s) and ""(s) denoting stdin. These file names are used
335 * (perhaps more than once) later.
337 * check for new machine-dep cmdline options in
338 * md_parse_option definitions in config/tc-*.c
342 parse_args (pargc
, pargv
)
346 int old_argc
, new_argc
;
347 char **old_argv
, **new_argv
;
349 /* Starting the short option string with '-' is for programs that
350 expect options and other ARGV-elements in any order and that care about
351 the ordering of the two. We describe each non-option ARGV-element
352 as if it were the argument of an option with character code 1. */
355 extern CONST
char *md_shortopts
;
356 static const char std_shortopts
[] =
359 #ifndef WORKING_DOT_WORD
360 /* -K is not meaningful if .word is not being hacked. */
363 'L', 'M', 'R', 'W', 'Z', 'f', 'a', ':', ':', 'D', 'I', ':', 'o', ':',
365 /* -v takes an argument on VMS, so we don't make it a generic
370 /* New option for extending instruction set (see also --itbl below) */
374 struct option
*longopts
;
375 extern struct option md_longopts
[];
376 extern size_t md_longopts_size
;
377 static const struct option std_longopts
[] = {
378 #define OPTION_HELP (OPTION_STD_BASE)
379 {"help", no_argument
, NULL
, OPTION_HELP
},
380 {"keep-locals", no_argument
, NULL
, 'L'},
381 {"mri", no_argument
, NULL
, 'M'},
382 #define OPTION_NOCPP (OPTION_STD_BASE + 1)
383 {"nocpp", no_argument
, NULL
, OPTION_NOCPP
},
384 #define OPTION_STATISTICS (OPTION_STD_BASE + 2)
385 {"statistics", no_argument
, NULL
, OPTION_STATISTICS
},
386 #define OPTION_VERSION (OPTION_STD_BASE + 3)
387 {"version", no_argument
, NULL
, OPTION_VERSION
},
388 #define OPTION_DUMPCONFIG (OPTION_STD_BASE + 4)
389 {"dump-config", no_argument
, NULL
, OPTION_DUMPCONFIG
},
390 #define OPTION_VERBOSE (OPTION_STD_BASE + 5)
391 {"verbose", no_argument
, NULL
, OPTION_VERBOSE
},
392 #define OPTION_EMULATION (OPTION_STD_BASE + 6)
393 {"emulation", required_argument
, NULL
, OPTION_EMULATION
},
394 #define OPTION_DEFSYM (OPTION_STD_BASE + 7)
395 {"defsym", required_argument
, NULL
, OPTION_DEFSYM
},
396 #define OPTION_INSTTBL (OPTION_STD_BASE + 8)
397 /* New option for extending instruction set (see also -t above).
398 The "-t file" or "--itbl file" option extends the basic set of
399 valid instructions by reading "file", a text file containing a
400 list of instruction formats. The additional opcodes and their
401 formats are added to the built-in set of instructions, and
402 mnemonics for new registers may also be defined. */
403 {"itbl", required_argument
, NULL
, OPTION_INSTTBL
},
404 #define OPTION_LISTING_LHS_WIDTH (OPTION_STD_BASE + 9)
405 {"listing-lhs-width", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH
},
406 #define OPTION_LISTING_LHS_WIDTH2 (OPTION_STD_BASE + 10)
407 {"listing-lhs-width", required_argument
, NULL
, OPTION_LISTING_LHS_WIDTH2
},
408 #define OPTION_LISTING_RHS_WIDTH (OPTION_STD_BASE + 11)
409 {"listing-rhs-width", required_argument
, NULL
, OPTION_LISTING_RHS_WIDTH
},
410 #define OPTION_LISTING_CONT_LINES (OPTION_STD_BASE + 12)
411 {"listing-cont-lines", required_argument
, NULL
, OPTION_LISTING_CONT_LINES
},
412 #define OPTION_DEPFILE (OPTION_STD_BASE + 13)
413 {"MD", required_argument
, NULL
, OPTION_DEPFILE
},
414 #define OPTION_GSTABS (OPTION_STD_BASE + 14)
415 {"gstabs", no_argument
, NULL
, OPTION_GSTABS
},
416 #define OPTION_STRIP_LOCAL_ABSOLUTE (OPTION_STD_BASE + 15)
417 {"strip-local-absolute", no_argument
, NULL
, OPTION_STRIP_LOCAL_ABSOLUTE
},
418 #define OPTION_TRADITIONAL_FORMAT (OPTION_STD_BASE + 16)
419 {"traditional-format", no_argument
, NULL
, OPTION_TRADITIONAL_FORMAT
},
420 #define OPTION_GDWARF2 (OPTION_STD_BASE + 17)
421 {"gdwarf2", no_argument
, NULL
, OPTION_GDWARF2
},
422 {"no-warn", no_argument
, NULL
, 'W'},
423 #define OPTION_WARN (OPTION_STD_BASE + 18)
424 {"warn", no_argument
, NULL
, OPTION_WARN
},
425 #define OPTION_WARN_FATAL (OPTION_STD_BASE + 19)
426 {"fatal-warnings", no_argument
, NULL
, OPTION_WARN_FATAL
}
429 /* Construct the option lists from the standard list and the target
430 dependent list. Include space for an extra NULL option and
431 always NULL terminate. */
432 shortopts
= concat (std_shortopts
, md_shortopts
, (char *) NULL
);
433 longopts
= (struct option
*) xmalloc (sizeof (std_longopts
)
435 + sizeof (struct option
));
436 memcpy (longopts
, std_longopts
, sizeof (std_longopts
));
437 memcpy ((char *) longopts
+ sizeof (std_longopts
),
438 md_longopts
, md_longopts_size
);
439 memset ((char *) longopts
+ sizeof (std_longopts
) + md_longopts_size
,
440 0, sizeof (struct option
));
442 /* Make a local copy of the old argv. */
446 /* Initialize a new argv that contains no options. */
447 new_argv
= (char **) xmalloc (sizeof (char *) * (old_argc
+ 1));
448 new_argv
[0] = old_argv
[0];
450 new_argv
[new_argc
] = NULL
;
454 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
455 indicate a long option. */
457 int optc
= getopt_long_only (old_argc
, old_argv
, shortopts
, longopts
,
466 /* md_parse_option should return 1 if it recognizes optc,
468 if (md_parse_option (optc
, optarg
) != 0)
470 /* `-v' isn't included in the general short_opts list, so check for
471 it explicity here before deciding we've gotten a bad argument. */
475 /* Telling getopt to treat -v's value as optional can result
476 in it picking up a following filename argument here. The
477 VMS code in md_parse_option can return 0 in that case,
478 but it has no way of pushing the filename argument back. */
479 if (optarg
&& *optarg
)
480 new_argv
[new_argc
++] = optarg
, new_argv
[new_argc
] = NULL
;
494 case 1: /* File name. */
495 if (!strcmp (optarg
, "-"))
497 new_argv
[new_argc
++] = optarg
;
498 new_argv
[new_argc
] = NULL
;
508 case OPTION_STATISTICS
:
509 flag_print_statistics
= 1;
512 case OPTION_STRIP_LOCAL_ABSOLUTE
:
513 flag_strip_local_absolute
= 1;
516 case OPTION_TRADITIONAL_FORMAT
:
517 flag_traditional_format
= 1;
521 /* This output is intended to follow the GNU standards document. */
522 printf (_("GNU assembler %s\n"), VERSION
);
523 printf (_("Copyright 2000 Free Software Foundation, Inc.\n"));
525 This program is free software; you may redistribute it under the terms of\n\
526 the GNU General Public License. This program has absolutely no warranty.\n"));
527 printf (_("This assembler was configured for a target of `%s'.\n"),
531 case OPTION_EMULATION
:
532 #ifdef USE_EMULATIONS
533 if (strcmp (optarg
, this_emulation
->name
))
534 as_fatal (_("multiple emulation names specified"));
536 as_fatal (_("emulations not handled in this configuration"));
540 case OPTION_DUMPCONFIG
:
541 fprintf (stderr
, _("alias = %s\n"), TARGET_ALIAS
);
542 fprintf (stderr
, _("canonical = %s\n"), TARGET_CANONICAL
);
543 fprintf (stderr
, _("cpu-type = %s\n"), TARGET_CPU
);
544 #ifdef TARGET_OBJ_FORMAT
545 fprintf (stderr
, _("format = %s\n"), TARGET_OBJ_FORMAT
);
548 fprintf (stderr
, _("bfd-target = %s\n"), TARGET_FORMAT
);
556 struct defsym_list
*n
;
558 for (s
= optarg
; *s
!= '\0' && *s
!= '='; s
++)
561 as_fatal (_("bad defsym; format is --defsym name=value"));
564 i
= bfd_scan_vma (s
, (const char **) NULL
, 0);
566 i
= strtol (s
, (char **) NULL
, 0);
568 n
= (struct defsym_list
*) xmalloc (sizeof *n
);
579 /* optarg is the name of the file containing the instruction
580 formats, opcodes, register names, etc. */
581 struct itbl_file_list
*n
;
585 as_warn ( _("No file name following -t option\n") );
589 n
= (struct itbl_file_list
*) xmalloc (sizeof *n
);
590 n
->next
= itbl_files
;
594 /* Parse the file and add the new instructions to our internal
595 table. If multiple instruction tables are specified, the
596 information from this table gets appended onto the existing
598 itbl_files
->name
= xstrdup (optarg
);
599 if (itbl_parse (itbl_files
->name
) != 0)
601 fprintf (stderr
, _("Failed to read instruction table %s\n"),
609 start_dependencies (optarg
);
613 debug_type
= DEBUG_STABS
;
617 debug_type
= DEBUG_DWARF2
;
621 flag_signed_overflow_ok
= 1;
624 #ifndef WORKING_DOT_WORD
626 flag_warn_displacement
= 1;
631 flag_keep_locals
= 1;
634 case OPTION_LISTING_LHS_WIDTH
:
635 listing_lhs_width
= atoi(optarg
);
636 if (listing_lhs_width_second
< listing_lhs_width
)
637 listing_lhs_width_second
= listing_lhs_width
;
639 case OPTION_LISTING_LHS_WIDTH2
:
641 int tmp
= atoi(optarg
);
642 if (tmp
> listing_lhs_width
)
643 listing_lhs_width_second
= tmp
;
646 case OPTION_LISTING_RHS_WIDTH
:
647 listing_rhs_width
= atoi(optarg
);
649 case OPTION_LISTING_CONT_LINES
:
650 listing_lhs_cont_lines
= atoi(optarg
);
661 flag_readonly_data_in_text
= 1;
665 flag_no_warnings
= 1;
669 flag_no_warnings
= 0;
670 flag_fatal_warnings
= 0;
673 case OPTION_WARN_FATAL
:
674 flag_no_warnings
= 0;
675 flag_fatal_warnings
= 1;
679 flag_always_generate_output
= 1;
685 if (md_parse_option (optc
, optarg
) != 0)
693 listing
|= LISTING_NOCOND
;
696 listing
|= LISTING_NODEBUG
;
699 listing
|= LISTING_HLL
;
702 listing
|= LISTING_LISTING
;
705 listing
|= LISTING_MACEXP
;
708 listing
|= LISTING_NOFORM
;
711 listing
|= LISTING_SYMBOLS
;
714 listing_filename
= xstrdup (optarg
+ 1);
715 optarg
+= strlen (listing_filename
);
718 as_fatal (_("invalid listing option `%c'"), *optarg
);
725 listing
= LISTING_DEFAULT
;
729 /* DEBUG is implemented: it debugs different */
730 /* things from other people's assemblers. */
735 flag_no_comments
= 1;
739 { /* Include file directory */
740 char *temp
= xstrdup (optarg
);
741 add_include_dir (temp
);
746 out_file_name
= xstrdup (optarg
);
753 /* -X means treat warnings as errors */
765 static long start_time
;
776 start_time
= get_run_time ();
778 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
779 setlocale (LC_MESSAGES
, "");
781 bindtextdomain (PACKAGE
, LOCALEDIR
);
782 textdomain (PACKAGE
);
787 extern long _bfd_chunksize
;
793 #ifdef HOST_SPECIAL_INIT
794 HOST_SPECIAL_INIT (argc
, argv
);
798 xmalloc_set_program_name (myname
);
800 START_PROGRESS (myname
, 0);
802 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
803 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
806 out_file_name
= OBJ_DEFAULT_OUTPUT_FILE_NAME
;
811 bfd_set_error_program_name (myname
);
814 #ifdef USE_EMULATIONS
815 select_emulation_mode (argc
, argv
);
822 parse_args (&argc
, &argv
);
824 input_scrub_begin ();
827 if (flag_print_statistics
)
828 xatexit (dump_statistics
);
833 macro_strip_at
= flag_mri
;
836 /* For compatibility with the AMD 29K family macro assembler
842 macro_init (macro_alternate
, flag_mri
, macro_strip_at
, macro_expr
);
847 output_file_create (out_file_name
);
848 assert (stdoutput
!= 0);
851 #ifdef tc_init_after_args
852 tc_init_after_args ();
857 /* Now that we have fully initialized, and have created the output
858 file, define any symbols requested by --defsym command line
860 while (defsyms
!= NULL
)
863 struct defsym_list
*next
;
865 sym
= symbol_new (defsyms
->name
, absolute_section
, defsyms
->value
,
867 symbol_table_insert (sym
);
868 next
= defsyms
->next
;
875 perform_an_assembly_pass (argc
, argv
); /* Assemble it. */
877 cond_finish_check (-1);
883 if (seen_at_least_1_file ()
884 && (flag_always_generate_output
|| had_errors () == 0))
889 #if defined (BFD_ASSEMBLER) || !defined (BFD)
890 /* This used to be done at the start of write_object_file in
891 write.c, but that caused problems when doing listings when
892 keep_it was zero. This could probably be moved above md_end, but
893 I didn't want to risk the change. */
898 write_object_file ();
901 listing_print (listing_filename
);
904 #ifndef OBJ_VMS /* does its own file handling */
905 #ifndef BFD_ASSEMBLER
908 output_file_close (out_file_name
);
911 if (flag_fatal_warnings
&& had_warnings() > 0 && had_errors () == 0)
912 as_bad (_("%d warnings, treating warnings as errors"), had_warnings());
914 if (had_errors () > 0 && ! flag_always_generate_output
)
918 unlink (out_file_name
);
922 END_PROGRESS (myname
);
924 /* Use xexit instead of return, because under VMS environments they
925 may not place the same interpretation on the value given. */
926 if (had_errors () > 0)
927 xexit (EXIT_FAILURE
);
929 /* Only generate dependency file if assembler was successful. */
930 print_dependencies ();
932 xexit (EXIT_SUCCESS
);
939 char *lim
= (char *) sbrk (0);
941 long run_time
= get_run_time () - start_time
;
943 fprintf (stderr
, _("%s: total time in assembly: %ld.%06ld\n"),
944 myname
, run_time
/ 1000000, run_time
% 1000000);
946 fprintf (stderr
, _("%s: data size %ld\n"),
947 myname
, (long) (lim
- (char *) &environ
));
950 subsegs_print_statistics (stderr
);
951 write_print_statistics (stderr
);
952 symbol_print_statistics (stderr
);
953 read_print_statistics (stderr
);
955 #ifdef tc_print_statistics
956 tc_print_statistics (stderr
);
958 #ifdef obj_print_statistics
959 obj_print_statistics (stderr
);
964 /* perform_an_assembly_pass()
966 * Here to attempt 1 pass over each input file.
967 * We scan argv[*] looking for filenames or exactly "" which is
968 * shorthand for stdin. Any argv that is NULL is not a file-name.
969 * We set need_pass_2 TRUE if, after this, we still have unresolved
970 * expressions of the form (unknown value)+-(unknown value).
972 * Note the un*x semantics: there is only 1 logical input file, but it
973 * may be a catenation of many 'physical' input files.
976 perform_an_assembly_pass (argc
, argv
)
987 #ifndef BFD_ASSEMBLER
991 for (i
= SEG_E0
; i
< SEG_UNKNOWN
; i
++)
992 segment_info
[i
].fix_root
= 0;
994 /* Create the three fixed ones */
999 seg
= subseg_new (".wtext", 0);
1001 seg
= subseg_new (".text", 0);
1003 assert (seg
== SEG_E0
);
1004 seg
= subseg_new (".data", 0);
1005 assert (seg
== SEG_E1
);
1006 seg
= subseg_new (".bss", 0);
1007 assert (seg
== SEG_E2
);
1009 create_target_segments ();
1013 #else /* not MANY_SEGMENTS */
1014 text_fix_root
= NULL
;
1015 data_fix_root
= NULL
;
1016 bss_fix_root
= NULL
;
1017 #endif /* not MANY_SEGMENTS */
1018 #else /* BFD_ASSEMBLER */
1019 /* Create the standard sections, and those the assembler uses
1021 text_section
= subseg_new (TEXT_SECTION_NAME
, 0);
1022 data_section
= subseg_new (DATA_SECTION_NAME
, 0);
1023 bss_section
= subseg_new (BSS_SECTION_NAME
, 0);
1024 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1025 to have relocs, otherwise we don't find out in time. */
1026 applicable
= bfd_applicable_section_flags (stdoutput
);
1027 bfd_set_section_flags (stdoutput
, text_section
,
1028 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1029 | SEC_CODE
| SEC_READONLY
));
1030 bfd_set_section_flags (stdoutput
, data_section
,
1031 applicable
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
1033 bfd_set_section_flags (stdoutput
, bss_section
, applicable
& SEC_ALLOC
);
1034 seg_info (bss_section
)->bss
= 1;
1035 subseg_new (BFD_ABS_SECTION_NAME
, 0);
1036 subseg_new (BFD_UND_SECTION_NAME
, 0);
1037 reg_section
= subseg_new ("*GAS `reg' section*", 0);
1038 expr_section
= subseg_new ("*GAS `expr' section*", 0);
1040 #endif /* BFD_ASSEMBLER */
1042 subseg_set (text_section
, 0);
1044 /* This may add symbol table entries, which requires having an open BFD,
1045 and sections already created, in BFD_ASSEMBLER mode. */
1052 argv
++; /* skip argv[0] */
1053 argc
--; /* skip argv[0] */
1057 { /* Is it a file-name argument? */
1060 /* argv->"" if stdin desired, else->filename */
1061 read_a_source_file (*argv
);
1063 argv
++; /* completed that argv */
1066 read_a_source_file ("");
1067 } /* perform_an_assembly_pass() */
1069 /* The interface between the macro code and gas expression handling. */
1072 macro_expr (emsg
, idx
, in
, val
)
1083 hold
= input_line_pointer
;
1084 input_line_pointer
= in
->ptr
+ idx
;
1086 idx
= input_line_pointer
- in
->ptr
;
1087 input_line_pointer
= hold
;
1089 if (ex
.X_op
!= O_constant
)
1090 as_bad ("%s", emsg
);
1092 *val
= (int) ex
.X_add_number
;