Remove L fromlist of accepting listin goptions
[deliverable/binutils-gdb.git] / gas / as.c
1 /* as.c - GAS main program.
2 Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001
4 Free Software Foundation, Inc.
5
6 This file is part of GAS, the GNU Assembler.
7
8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
11 any later version.
12
13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
21 02111-1307, USA. */
22
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
26 * are shared.
27 *
28 * bugs
29 *
30 * : initialisers
31 * Since no-one else says they will support them in future: I
32 * don't support them now.
33 */
34
35 #include "ansidecl.h"
36
37 #define COMMON
38
39 #include "as.h"
40 #include "subsegs.h"
41 #include "output-file.h"
42 #include "sb.h"
43 #include "macro.h"
44 #include "dwarf2dbg.h"
45
46 #ifdef HAVE_ITBL_CPU
47 #include "itbl-ops.h"
48 #else
49 #define itbl_parse(itbl_file) 1
50 #define itbl_init()
51 #endif
52
53 #ifdef HAVE_SBRK
54 #ifdef NEED_DECLARATION_SBRK
55 extern PTR sbrk ();
56 #endif
57 #endif
58
59 static void show_usage PARAMS ((FILE *));
60 static void parse_args PARAMS ((int *, char ***));
61 static void dump_statistics PARAMS ((void));
62 static void perform_an_assembly_pass PARAMS ((int argc, char **argv));
63 static int macro_expr PARAMS ((const char *, int, sb *, int *));
64
65 /* True if a listing is wanted. */
66 int listing;
67
68 /* Name of listing file. */
69 static char *listing_filename = NULL;
70
71 /* Type of debugging to generate. */
72
73 enum debug_info_type debug_type = DEBUG_UNSPECIFIED;
74
75 /* Maximum level of macro nesting. */
76 int max_macro_nest = 100;
77
78 /* argv[0] */
79 char *myname;
80 #ifdef BFD_ASSEMBLER
81 segT reg_section, expr_section;
82 segT text_section, data_section, bss_section;
83 #endif
84
85 /* The default obstack chunk size. If we set this to zero, the
86 obstack code will use whatever will fit in a 4096 byte block. */
87 int chunksize = 0;
88
89 /* To monitor memory allocation more effectively, make this non-zero.
90 Then the chunk sizes for gas and bfd will be reduced. */
91 int debug_memory = 0;
92
93 /* We build a list of defsyms as we read the options, and then define
94 them after we have initialized everything. */
95
96 struct defsym_list {
97 struct defsym_list *next;
98 char *name;
99 valueT value;
100 };
101
102 static struct defsym_list *defsyms;
103
104 /* Keep a record of the itbl files we read in. */
105
106 struct itbl_file_list {
107 struct itbl_file_list *next;
108 char *name;
109 };
110
111 static struct itbl_file_list *itbl_files;
112 \f
113 #ifdef USE_EMULATIONS
114 #define EMULATION_ENVIRON "AS_EMULATION"
115
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;
120
121 static struct emulation *const emulations[] = { EMULATIONS };
122 static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]);
123
124 static void select_emulation_mode PARAMS ((int, char **));
125
126 static void
127 select_emulation_mode (argc, argv)
128 int argc;
129 char **argv;
130 {
131 int i;
132 char *p, *em = 0;
133
134 for (i = 1; i < argc; i++)
135 if (!strncmp ("--em", argv[i], 4))
136 break;
137
138 if (i == argc)
139 goto do_default;
140
141 p = strchr (argv[i], '=');
142 if (p)
143 p++;
144 else
145 p = argv[i + 1];
146
147 if (!p || !*p)
148 as_fatal (_("missing emulation mode name"));
149 em = p;
150
151 do_default:
152 if (em == 0)
153 em = getenv (EMULATION_ENVIRON);
154 if (em == 0)
155 em = DEFAULT_EMULATION;
156
157 if (em)
158 {
159 for (i = 0; i < n_emulations; i++)
160 if (!strcmp (emulations[i]->name, em))
161 break;
162 if (i == n_emulations)
163 as_fatal (_("unrecognized emulation name `%s'"), em);
164 this_emulation = emulations[i];
165 }
166 else
167 this_emulation = emulations[0];
168
169 this_emulation->init ();
170 }
171
172 const char *
173 default_emul_bfd_name ()
174 {
175 abort ();
176 return NULL;
177 }
178
179 void
180 common_emul_init ()
181 {
182 this_format = this_emulation->format;
183
184 if (this_emulation->leading_underscore == 2)
185 this_emulation->leading_underscore = this_format->dfl_leading_underscore;
186
187 if (this_emulation->default_endian != 2)
188 target_big_endian = this_emulation->default_endian;
189
190 if (this_emulation->fake_label_name == 0)
191 {
192 if (this_emulation->leading_underscore)
193 this_emulation->fake_label_name = "L0\001";
194 else
195 /* What other parameters should we test? */
196 this_emulation->fake_label_name = ".L0\001";
197 }
198 }
199 #endif
200
201 void
202 print_version_id ()
203 {
204 static int printed;
205 if (printed)
206 return;
207 printed = 1;
208
209 #ifdef BFD_ASSEMBLER
210 fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s"),
211 VERSION, TARGET_ALIAS, BFD_VERSION);
212 #else
213 fprintf (stderr, _("GNU assembler version %s (%s)"), VERSION, TARGET_ALIAS);
214 #endif
215 fprintf (stderr, "\n");
216 }
217
218 static void
219 show_usage (stream)
220 FILE *stream;
221 {
222 fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname);
223
224 fprintf (stream, _("\
225 Options:\n\
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\
234 s include symbols\n\
235 =FILE list to FILE (must be last sub-option)\n"));
236
237 fprintf (stream, _("\
238 -D produce assembler debugging messages\n"));
239 fprintf (stream, _("\
240 --defsym SYM=VAL define symbol SYM to given value\n"));
241 #ifdef USE_EMULATIONS
242 {
243 int i;
244 char *def_em;
245
246 fprintf (stream, "\
247 --em=[");
248 for (i = 0; i < n_emulations - 1; i++)
249 fprintf (stream, "%s | ", emulations[i]->name);
250 fprintf (stream, "%s]\n", emulations[i]->name);
251
252 def_em = getenv (EMULATION_ENVIRON);
253 if (!def_em)
254 def_em = DEFAULT_EMULATION;
255 fprintf (stream, _("\
256 emulate output (default %s)\n"), def_em);
257 }
258 #endif
259 fprintf (stream, _("\
260 -f skip whitespace and comment preprocessing\n"));
261 fprintf (stream, _("\
262 --gstabs generate stabs debugging information\n"));
263 fprintf (stream, _("\
264 --gdwarf2 generate DWARF2 debugging information\n"));
265 fprintf (stream, _("\
266 --help show this message and exit\n"));
267 fprintf (stream, _("\
268 --target-help show target specific options\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, _("\
282 -nocpp ignored\n"));
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, _("\
305 -w ignored\n"));
306 fprintf (stream, _("\
307 -X ignored\n"));
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\
312 the listing\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"));
323
324 md_show_usage (stream);
325
326 fputc ('\n', stream);
327 fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
328 }
329
330 /* Since it is easy to do here we interpret the special arg "-"
331 to mean "use stdin" and we set that argv[] pointing to "".
332 After we have munged argv[], the only things left are source file
333 name(s) and ""(s) denoting stdin. These file names are used
334 (perhaps more than once) later.
335
336 check for new machine-dep cmdline options in
337 md_parse_option definitions in config/tc-*.c. */
338
339 static void
340 parse_args (pargc, pargv)
341 int *pargc;
342 char ***pargv;
343 {
344 int old_argc, new_argc;
345 char **old_argv, **new_argv;
346
347 /* Starting the short option string with '-' is for programs that
348 expect options and other ARGV-elements in any order and that care about
349 the ordering of the two. We describe each non-option ARGV-element
350 as if it were the argument of an option with character code 1. */
351
352 char *shortopts;
353 extern CONST char *md_shortopts;
354 static const char std_shortopts[] = {
355 '-', 'J',
356 #ifndef WORKING_DOT_WORD
357 /* -K is not meaningful if .word is not being hacked. */
358 'K',
359 #endif
360 'L', 'M', 'R', 'W', 'Z', 'f', 'a', ':', ':', 'D', 'I', ':', 'o', ':',
361 #ifndef VMS
362 /* -v takes an argument on VMS, so we don't make it a generic
363 option. */
364 'v',
365 #endif
366 'w', 'X',
367 /* New option for extending instruction set (see also --itbl below) */
368 't', ':',
369 '\0'
370 };
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-width2", 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_TARGET_HELP (OPTION_STD_BASE + 19)
423 {"target-help", no_argument, NULL, OPTION_TARGET_HELP},
424 #define OPTION_WARN_FATAL (OPTION_STD_BASE + 20)
425 {"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL}
426 /* When you add options here, check that they do not collide with
427 OPTION_MD_BASE. See as.h. */
428 };
429
430 /* Construct the option lists from the standard list and the target
431 dependent list. Include space for an extra NULL option and
432 always NULL terminate. */
433 shortopts = concat (std_shortopts, md_shortopts, (char *) NULL);
434 longopts = (struct option *) xmalloc (sizeof (std_longopts)
435 + md_longopts_size
436 + sizeof (struct option));
437 memcpy (longopts, std_longopts, sizeof (std_longopts));
438 memcpy ((char *) longopts + sizeof (std_longopts),
439 md_longopts, md_longopts_size);
440 memset ((char *) longopts + sizeof (std_longopts) + md_longopts_size,
441 0, sizeof (struct option));
442
443 /* Make a local copy of the old argv. */
444 old_argc = *pargc;
445 old_argv = *pargv;
446
447 /* Initialize a new argv that contains no options. */
448 new_argv = (char **) xmalloc (sizeof (char *) * (old_argc + 1));
449 new_argv[0] = old_argv[0];
450 new_argc = 1;
451 new_argv[new_argc] = NULL;
452
453 while (1)
454 {
455 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
456 indicate a long option. */
457 int longind;
458 int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts,
459 &longind);
460
461 if (optc == -1)
462 break;
463
464 switch (optc)
465 {
466 default:
467 /* md_parse_option should return 1 if it recognizes optc,
468 0 if not. */
469 if (md_parse_option (optc, optarg) != 0)
470 break;
471 /* `-v' isn't included in the general short_opts list, so check for
472 it explicity here before deciding we've gotten a bad argument. */
473 if (optc == 'v')
474 {
475 #ifdef VMS
476 /* Telling getopt to treat -v's value as optional can result
477 in it picking up a following filename argument here. The
478 VMS code in md_parse_option can return 0 in that case,
479 but it has no way of pushing the filename argument back. */
480 if (optarg && *optarg)
481 new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL;
482 else
483 #else
484 case 'v':
485 #endif
486 case OPTION_VERBOSE:
487 print_version_id ();
488 break;
489 }
490 /* Fall through. */
491
492 case '?':
493 exit (EXIT_FAILURE);
494
495 case 1: /* File name. */
496 if (!strcmp (optarg, "-"))
497 optarg = "";
498 new_argv[new_argc++] = optarg;
499 new_argv[new_argc] = NULL;
500 break;
501
502 case OPTION_TARGET_HELP:
503 md_show_usage (stdout);
504 exit (EXIT_SUCCESS);
505
506 case OPTION_HELP:
507 show_usage (stdout);
508 exit (EXIT_SUCCESS);
509
510 case OPTION_NOCPP:
511 break;
512
513 case OPTION_STATISTICS:
514 flag_print_statistics = 1;
515 break;
516
517 case OPTION_STRIP_LOCAL_ABSOLUTE:
518 flag_strip_local_absolute = 1;
519 break;
520
521 case OPTION_TRADITIONAL_FORMAT:
522 flag_traditional_format = 1;
523 break;
524
525 case OPTION_VERSION:
526 /* This output is intended to follow the GNU standards document. */
527 printf (_("GNU assembler %s\n"), VERSION);
528 printf (_("Copyright 2001 Free Software Foundation, Inc.\n"));
529 printf (_("\
530 This program is free software; you may redistribute it under the terms of\n\
531 the GNU General Public License. This program has absolutely no warranty.\n"));
532 printf (_("This assembler was configured for a target of `%s'.\n"),
533 TARGET_ALIAS);
534 exit (EXIT_SUCCESS);
535
536 case OPTION_EMULATION:
537 #ifdef USE_EMULATIONS
538 if (strcmp (optarg, this_emulation->name))
539 as_fatal (_("multiple emulation names specified"));
540 #else
541 as_fatal (_("emulations not handled in this configuration"));
542 #endif
543 break;
544
545 case OPTION_DUMPCONFIG:
546 fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS);
547 fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL);
548 fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU);
549 #ifdef TARGET_OBJ_FORMAT
550 fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT);
551 #endif
552 #ifdef TARGET_FORMAT
553 fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT);
554 #endif
555 exit (EXIT_SUCCESS);
556
557 case OPTION_DEFSYM:
558 {
559 char *s;
560 valueT i;
561 struct defsym_list *n;
562
563 for (s = optarg; *s != '\0' && *s != '='; s++)
564 ;
565 if (*s == '\0')
566 as_fatal (_("bad defsym; format is --defsym name=value"));
567 *s++ = '\0';
568 #ifdef BFD_ASSEMBLER
569 i = bfd_scan_vma (s, (const char **) NULL, 0);
570 #else
571 i = strtol (s, (char **) NULL, 0);
572 #endif
573 n = (struct defsym_list *) xmalloc (sizeof *n);
574 n->next = defsyms;
575 n->name = optarg;
576 n->value = i;
577 defsyms = n;
578 }
579 break;
580
581 case OPTION_INSTTBL:
582 case 't':
583 {
584 /* optarg is the name of the file containing the instruction
585 formats, opcodes, register names, etc. */
586 struct itbl_file_list *n;
587
588 if (optarg == NULL)
589 {
590 as_warn (_("No file name following -t option\n"));
591 break;
592 }
593
594 n = (struct itbl_file_list *) xmalloc (sizeof *n);
595 n->next = itbl_files;
596 n->name = optarg;
597 itbl_files = n;
598
599 /* Parse the file and add the new instructions to our internal
600 table. If multiple instruction tables are specified, the
601 information from this table gets appended onto the existing
602 internal table. */
603 itbl_files->name = xstrdup (optarg);
604 if (itbl_parse (itbl_files->name) != 0)
605 {
606 fprintf (stderr, _("Failed to read instruction table %s\n"),
607 itbl_files->name);
608 exit (EXIT_SUCCESS);
609 }
610 }
611 break;
612
613 case OPTION_DEPFILE:
614 start_dependencies (optarg);
615 break;
616
617 case OPTION_GSTABS:
618 debug_type = DEBUG_STABS;
619 break;
620
621 case OPTION_GDWARF2:
622 debug_type = DEBUG_DWARF2;
623 break;
624
625 case 'J':
626 flag_signed_overflow_ok = 1;
627 break;
628
629 #ifndef WORKING_DOT_WORD
630 case 'K':
631 flag_warn_displacement = 1;
632 break;
633 #endif
634
635 case 'L':
636 flag_keep_locals = 1;
637 break;
638
639 case OPTION_LISTING_LHS_WIDTH:
640 listing_lhs_width = atoi (optarg);
641 if (listing_lhs_width_second < listing_lhs_width)
642 listing_lhs_width_second = listing_lhs_width;
643 break;
644 case OPTION_LISTING_LHS_WIDTH2:
645 {
646 int tmp = atoi (optarg);
647 if (tmp > listing_lhs_width)
648 listing_lhs_width_second = tmp;
649 }
650 break;
651 case OPTION_LISTING_RHS_WIDTH:
652 listing_rhs_width = atoi (optarg);
653 break;
654 case OPTION_LISTING_CONT_LINES:
655 listing_lhs_cont_lines = atoi (optarg);
656 break;
657
658 case 'M':
659 flag_mri = 1;
660 #ifdef TC_M68K
661 flag_m68k_mri = 1;
662 #endif
663 break;
664
665 case 'R':
666 flag_readonly_data_in_text = 1;
667 break;
668
669 case 'W':
670 flag_no_warnings = 1;
671 break;
672
673 case OPTION_WARN:
674 flag_no_warnings = 0;
675 flag_fatal_warnings = 0;
676 break;
677
678 case OPTION_WARN_FATAL:
679 flag_no_warnings = 0;
680 flag_fatal_warnings = 1;
681 break;
682
683 case 'Z':
684 flag_always_generate_output = 1;
685 break;
686
687 case 'a':
688 if (optarg)
689 {
690 if (md_parse_option (optc, optarg) != 0)
691 break;
692
693 while (*optarg)
694 {
695 switch (*optarg)
696 {
697 case 'c':
698 listing |= LISTING_NOCOND;
699 break;
700 case 'd':
701 listing |= LISTING_NODEBUG;
702 break;
703 case 'h':
704 listing |= LISTING_HLL;
705 break;
706 case 'l':
707 listing |= LISTING_LISTING;
708 break;
709 case 'm':
710 listing |= LISTING_MACEXP;
711 break;
712 case 'n':
713 listing |= LISTING_NOFORM;
714 break;
715 case 's':
716 listing |= LISTING_SYMBOLS;
717 break;
718 case '=':
719 listing_filename = xstrdup (optarg + 1);
720 optarg += strlen (listing_filename);
721 break;
722 default:
723 as_fatal (_("invalid listing option `%c'"), *optarg);
724 break;
725 }
726 optarg++;
727 }
728 }
729 if (!listing)
730 listing = LISTING_DEFAULT;
731 break;
732
733 case 'D':
734 /* DEBUG is implemented: it debugs different
735 things from other people's assemblers. */
736 flag_debug = 1;
737 break;
738
739 case 'f':
740 flag_no_comments = 1;
741 break;
742
743 case 'I':
744 { /* Include file directory. */
745 char *temp = xstrdup (optarg);
746 add_include_dir (temp);
747 break;
748 }
749
750 case 'o':
751 out_file_name = xstrdup (optarg);
752 break;
753
754 case 'w':
755 break;
756
757 case 'X':
758 /* -X means treat warnings as errors. */
759 break;
760 }
761 }
762
763 free (shortopts);
764 free (longopts);
765
766 *pargc = new_argc;
767 *pargv = new_argv;
768 }
769
770 static long start_time;
771
772 int
773 main (argc, argv)
774 int argc;
775 char **argv;
776 {
777 int macro_alternate;
778 int macro_strip_at;
779 int keep_it;
780
781 start_time = get_run_time ();
782
783 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
784 setlocale (LC_MESSAGES, "");
785 #endif
786 bindtextdomain (PACKAGE, LOCALEDIR);
787 textdomain (PACKAGE);
788
789 if (debug_memory)
790 {
791 #ifdef BFD_ASSEMBLER
792 extern long _bfd_chunksize;
793 _bfd_chunksize = 64;
794 #endif
795 chunksize = 64;
796 }
797
798 #ifdef HOST_SPECIAL_INIT
799 HOST_SPECIAL_INIT (argc, argv);
800 #endif
801
802 myname = argv[0];
803 xmalloc_set_program_name (myname);
804
805 START_PROGRESS (myname, 0);
806
807 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
808 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
809 #endif
810
811 out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
812
813 hex_init ();
814 #ifdef BFD_ASSEMBLER
815 bfd_init ();
816 bfd_set_error_program_name (myname);
817 #endif
818
819 #ifdef USE_EMULATIONS
820 select_emulation_mode (argc, argv);
821 #endif
822
823 PROGRESS (1);
824 symbol_begin ();
825 frag_init ();
826 subsegs_begin ();
827 parse_args (&argc, &argv);
828 read_begin ();
829 input_scrub_begin ();
830 expr_begin ();
831
832 if (flag_print_statistics)
833 xatexit (dump_statistics);
834
835 macro_alternate = 0;
836 macro_strip_at = 0;
837 #ifdef TC_I960
838 macro_strip_at = flag_mri;
839 #endif
840 #ifdef TC_A29K
841 /* For compatibility with the AMD 29K family macro assembler
842 specification. */
843 macro_alternate = 1;
844 macro_strip_at = 1;
845 #endif
846
847 macro_init (macro_alternate, flag_mri, macro_strip_at, macro_expr);
848
849 PROGRESS (1);
850
851 #ifdef BFD_ASSEMBLER
852 output_file_create (out_file_name);
853 assert (stdoutput != 0);
854 #endif
855
856 #ifdef tc_init_after_args
857 tc_init_after_args ();
858 #endif
859
860 itbl_init ();
861
862 /* Now that we have fully initialized, and have created the output
863 file, define any symbols requested by --defsym command line
864 arguments. */
865 while (defsyms != NULL)
866 {
867 symbolS *sym;
868 struct defsym_list *next;
869
870 sym = symbol_new (defsyms->name, absolute_section, defsyms->value,
871 &zero_address_frag);
872 symbol_table_insert (sym);
873 next = defsyms->next;
874 free (defsyms);
875 defsyms = next;
876 }
877
878 PROGRESS (1);
879
880 /* Assemble it. */
881 perform_an_assembly_pass (argc, argv);
882
883 cond_finish_check (-1);
884
885 #ifdef md_end
886 md_end ();
887 #endif
888
889 /* If we've been collecting dwarf2 .debug_line info, either for
890 assembly debugging or on behalf of the compiler, emit it now. */
891 dwarf2_finish ();
892
893 if (seen_at_least_1_file ()
894 && (flag_always_generate_output || had_errors () == 0))
895 keep_it = 1;
896 else
897 keep_it = 0;
898
899 #if defined (BFD_ASSEMBLER) || !defined (BFD)
900 /* This used to be done at the start of write_object_file in
901 write.c, but that caused problems when doing listings when
902 keep_it was zero. This could probably be moved above md_end, but
903 I didn't want to risk the change. */
904 subsegs_finish ();
905 #endif
906
907 if (keep_it)
908 write_object_file ();
909
910 #ifndef NO_LISTING
911 listing_print (listing_filename);
912 #endif
913
914 #ifndef OBJ_VMS /* does its own file handling */
915 #ifndef BFD_ASSEMBLER
916 if (keep_it)
917 #endif
918 output_file_close (out_file_name);
919 #endif
920
921 if (flag_fatal_warnings && had_warnings () > 0 && had_errors () == 0)
922 as_bad (_("%d warnings, treating warnings as errors"), had_warnings ());
923
924 if (had_errors () > 0 && ! flag_always_generate_output)
925 keep_it = 0;
926
927 if (!keep_it)
928 unlink (out_file_name);
929
930 input_scrub_end ();
931
932 END_PROGRESS (myname);
933
934 /* Use xexit instead of return, because under VMS environments they
935 may not place the same interpretation on the value given. */
936 if (had_errors () > 0)
937 xexit (EXIT_FAILURE);
938
939 /* Only generate dependency file if assembler was successful. */
940 print_dependencies ();
941
942 xexit (EXIT_SUCCESS);
943 }
944
945 static void
946 dump_statistics ()
947 {
948 #ifdef HAVE_SBRK
949 char *lim = (char *) sbrk (0);
950 #endif
951 long run_time = get_run_time () - start_time;
952
953 fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"),
954 myname, run_time / 1000000, run_time % 1000000);
955 #ifdef HAVE_SBRK
956 fprintf (stderr, _("%s: data size %ld\n"),
957 myname, (long) (lim - (char *) &environ));
958 #endif
959
960 subsegs_print_statistics (stderr);
961 write_print_statistics (stderr);
962 symbol_print_statistics (stderr);
963 read_print_statistics (stderr);
964
965 #ifdef tc_print_statistics
966 tc_print_statistics (stderr);
967 #endif
968 #ifdef obj_print_statistics
969 obj_print_statistics (stderr);
970 #endif
971 }
972 \f
973 /* Here to attempt 1 pass over each input file.
974 We scan argv[*] looking for filenames or exactly "" which is
975 shorthand for stdin. Any argv that is NULL is not a file-name.
976 We set need_pass_2 TRUE if, after this, we still have unresolved
977 expressions of the form (unknown value)+-(unknown value).
978
979 Note the un*x semantics: there is only 1 logical input file, but it
980 may be a catenation of many 'physical' input files. */
981
982 static void
983 perform_an_assembly_pass (argc, argv)
984 int argc;
985 char **argv;
986 {
987 int saw_a_file = 0;
988 #ifdef BFD_ASSEMBLER
989 flagword applicable;
990 #endif
991
992 need_pass_2 = 0;
993
994 #ifndef BFD_ASSEMBLER
995 #ifdef MANY_SEGMENTS
996 {
997 unsigned int i;
998 for (i = SEG_E0; i < SEG_UNKNOWN; i++)
999 segment_info[i].fix_root = 0;
1000 }
1001 /* Create the three fixed ones. */
1002 {
1003 segT seg;
1004
1005 #ifdef TE_APOLLO
1006 seg = subseg_new (".wtext", 0);
1007 #else
1008 seg = subseg_new (".text", 0);
1009 #endif
1010 assert (seg == SEG_E0);
1011 seg = subseg_new (".data", 0);
1012 assert (seg == SEG_E1);
1013 seg = subseg_new (".bss", 0);
1014 assert (seg == SEG_E2);
1015 #ifdef TE_APOLLO
1016 create_target_segments ();
1017 #endif
1018 }
1019
1020 #else /* not MANY_SEGMENTS */
1021 text_fix_root = NULL;
1022 data_fix_root = NULL;
1023 bss_fix_root = NULL;
1024 #endif /* not MANY_SEGMENTS */
1025 #else /* BFD_ASSEMBLER */
1026 /* Create the standard sections, and those the assembler uses
1027 internally. */
1028 text_section = subseg_new (TEXT_SECTION_NAME, 0);
1029 data_section = subseg_new (DATA_SECTION_NAME, 0);
1030 bss_section = subseg_new (BSS_SECTION_NAME, 0);
1031 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1032 to have relocs, otherwise we don't find out in time. */
1033 applicable = bfd_applicable_section_flags (stdoutput);
1034 bfd_set_section_flags (stdoutput, text_section,
1035 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1036 | SEC_CODE | SEC_READONLY));
1037 bfd_set_section_flags (stdoutput, data_section,
1038 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1039 | SEC_DATA));
1040 bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC);
1041 seg_info (bss_section)->bss = 1;
1042 subseg_new (BFD_ABS_SECTION_NAME, 0);
1043 subseg_new (BFD_UND_SECTION_NAME, 0);
1044 reg_section = subseg_new ("*GAS `reg' section*", 0);
1045 expr_section = subseg_new ("*GAS `expr' section*", 0);
1046
1047 #endif /* BFD_ASSEMBLER */
1048
1049 subseg_set (text_section, 0);
1050
1051 /* This may add symbol table entries, which requires having an open BFD,
1052 and sections already created, in BFD_ASSEMBLER mode. */
1053 md_begin ();
1054
1055 #ifdef obj_begin
1056 obj_begin ();
1057 #endif
1058
1059 /* Skip argv[0]. */
1060 argv++;
1061 argc--;
1062
1063 while (argc--)
1064 {
1065 if (*argv)
1066 { /* Is it a file-name argument? */
1067 PROGRESS (1);
1068 saw_a_file++;
1069 /* argv->"" if stdin desired, else->filename */
1070 read_a_source_file (*argv);
1071 }
1072 argv++; /* completed that argv */
1073 }
1074 if (!saw_a_file)
1075 read_a_source_file ("");
1076 }
1077
1078 /* The interface between the macro code and gas expression handling. */
1079
1080 static int
1081 macro_expr (emsg, idx, in, val)
1082 const char *emsg;
1083 int idx;
1084 sb *in;
1085 int *val;
1086 {
1087 char *hold;
1088 expressionS ex;
1089
1090 sb_terminate (in);
1091
1092 hold = input_line_pointer;
1093 input_line_pointer = in->ptr + idx;
1094 expression (&ex);
1095 idx = input_line_pointer - in->ptr;
1096 input_line_pointer = hold;
1097
1098 if (ex.X_op != O_constant)
1099 as_bad ("%s", emsg);
1100
1101 *val = (int) ex.X_add_number;
1102
1103 return idx;
1104 }
This page took 0.051351 seconds and 5 git commands to generate.