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* lib/gas-defs.exp (regexp_diff): Allow '#...' to mean "some
[binutils.git] / gas / as.c
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252b5132
RH		 1/* as.c - GAS main program.
2 Copyright (C) 1987, 90, 91, 92, 93, 94, 95, 96, 97, 98, 1999
3 Free Software Foundation, Inc.
4
5 This file is part of GAS, the GNU Assembler.
6
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)
10 any later version.
11
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.
16
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
20 02111-1307, USA. */
21
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 *
29 * bugs
30 *
31 * : initialisers
32 * Since no-one else says they will support them in future: I
33 * don't support them now.
34 *
35 */
36
37#include "ansidecl.h"
38
39#define COMMON
40
41#include "as.h"
42#include "subsegs.h"
43#include "output-file.h"
44#include "sb.h"
45#include "macro.h"
46
84be4d71
ILT		 47#ifdef HAVE_ITBL_CPU
48#include "itbl-ops.h"
49#else
252b5132
RH		 50#define itbl_parse(itbl_file) 1
51#define itbl_init()
52#endif
53
54#ifdef HAVE_SBRK
55#ifdef NEED_DECLARATION_SBRK
56extern PTR sbrk ();
57#endif
58#endif
59
60static void show_usage PARAMS ((FILE *));
61static void parse_args PARAMS ((int *, char ***));
62static void dump_statistics PARAMS ((void));
63static void perform_an_assembly_pass PARAMS ((int argc, char **argv));
64static int macro_expr PARAMS ((const char *, int, sb *, int *));
65
66int listing; /* true if a listing is wanted */
67
68static char *listing_filename = NULL; /* Name of listing file. */
69
70/* Type of debugging to generate. */
71
72enum debug_info_type debug_type = DEBUG_NONE;
73
74/* Maximum level of macro nesting. */
75
76int max_macro_nest = 100;
77
78char *myname; /* argv[0] */
79#ifdef BFD_ASSEMBLER
80segT reg_section, expr_section;
81segT text_section, data_section, bss_section;
82#endif
83
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. */
86int chunksize = 0;
87
88/* To monitor memory allocation more effectively, make this non-zero.
89 Then the chunk sizes for gas and bfd will be reduced. */
90int debug_memory = 0;
91
92/* We build a list of defsyms as we read the options, and then define
93 them after we have initialized everything. */
94
95struct defsym_list
96{
97 struct defsym_list *next;
98 char *name;
99 valueT value;
100};
101
102static struct defsym_list *defsyms;
103
104/* Keep a record of the itbl files we read in. */
105
106struct itbl_file_list
107{
108 struct itbl_file_list *next;
109 char *name;
110};
111
112static struct itbl_file_list *itbl_files;
113\f
114void
115print_version_id ()
116{
117 static int printed;
118 if (printed)
119 return;
120 printed = 1;
121
122#ifdef BFD_ASSEMBLER
123 fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s"),
124 VERSION, TARGET_ALIAS, BFD_VERSION);
125#else
126 fprintf (stderr, _("GNU assembler version %s (%s)"), VERSION, TARGET_ALIAS);
127#endif
128 fprintf (stderr, "\n");
129}
130
131static void
132show_usage (stream)
133 FILE *stream;
134{
135 fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname);
136
137 fprintf (stream, _("\
138Options:\n\
139 -a[sub-option...] turn on listings\n\
140 Sub-options [default hls]:\n\
141 c omit false conditionals\n\
142 d omit debugging directives\n\
143 h include high-level source\n\
144 l include assembly\n\
145 m include macro expansions\n\
146 n omit forms processing\n\
147 s include symbols\n\
fac0d250 148 L include line debug statistics (if applicable)\n\
252b5132
RH		 149 =file set listing file name (must be last sub-option)\n"));
150
151 fprintf (stream, _("\
152 -D produce assembler debugging messages\n\
153 --defsym SYM=VAL define symbol SYM to given value\n\
154 -f skip whitespace and comment preprocessing\n\
155 --gstabs generate stabs debugging information\n\
cdf82bcf 156 --gdwarf2 generate DWARF2 debugging information\n\
252b5132
RH		 157 --help show this message and exit\n\
158 -I DIR add DIR to search list for .include directives\n\
159 -J don't warn about signed overflow\n\
160 -K warn when differences altered for long displacements\n\
161 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
162
163 fprintf (stream, _("\
164 -M,--mri assemble in MRI compatibility mode\n\
165 --MD FILE write dependency information in FILE (default none)\n\
166 -nocpp ignored\n\
167 -o OBJFILE name the object-file output OBJFILE (default a.out)\n\
168 -R fold data section into text section\n\
169 --statistics print various measured statistics from execution\n\
170 --strip-local-absolute strip local absolute symbols\n\
171 --traditional-format Use same format as native assembler when possible\n\
172 --version print assembler version number and exit\n\
173 -W suppress warnings\n\
174 --itbl INSTTBL extend instruction set to include instructions\n\
175 matching the specifications defined in file INSTTBL\n\
176 -w ignored\n\
177 -X ignored\n\
178 -Z generate object file even after errors\n"));
179
180 fprintf (stream, _("\
181 --listing-lhs-width set the width in words of the output data column of\n\
182 the listing\n\
183 --listing-lhs-width2 set the width in words of the continuation lines\n\
184 of the output data column; ignored if smaller than\n\
185 the width of the first line\n\
186 --listing-rhs-width set the max width in characters of the lines from\n\
187 the source file\n\
188 --listing-cont-lines set the maximum number of continuation lines used\n\
189 for the output data column of the listing\n"));
190
191 md_show_usage (stream);
192
193 fprintf (stream, _("\nReport bugs to [email protected]\n"));
194}
195
196#ifdef USE_EMULATIONS
197#define EMULATION_ENVIRON "AS_EMULATION"
198
199extern struct emulation mipsbelf, mipslelf, mipself;
200extern struct emulation mipsbecoff, mipslecoff, mipsecoff;
201extern struct emulation i386coff, i386elf;
202
203static struct emulation *const emulations[] = { EMULATIONS };
204static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]);
205
206static void select_emulation_mode PARAMS ((int, char **));
207
208static void
209select_emulation_mode (argc, argv)
210 int argc;
211 char **argv;
212{
213 int i;
214 char *p, *em = 0;
215
216 for (i = 1; i < argc; i++)
217 if (!strncmp ("--em", argv[i], 4))
218 break;
219
220 if (i == argc)
221 goto do_default;
222
223 p = strchr (argv[i], '=');
224 if (p)
225 p++;
226 else
227 p = argv[i+1];
228
229 if (!p || !*p)
230 as_fatal (_("missing emulation mode name"));
231 em = p;
232
233 do_default:
234 if (em == 0)
235 em = getenv (EMULATION_ENVIRON);
236 if (em == 0)
237 em = DEFAULT_EMULATION;
238
239 if (em)
240 {
241 for (i = 0; i < n_emulations; i++)
242 if (!strcmp (emulations[i]->name, em))
243 break;
244 if (i == n_emulations)
245 as_fatal (_("unrecognized emulation name `%s'"), em);
246 this_emulation = emulations[i];
247 }
248 else
249 this_emulation = emulations[0];
250
251 this_emulation->init ();
252}
253
254const char *
255default_emul_bfd_name ()
256{
257 abort ();
258 return NULL;
259}
260
261void
262common_emul_init ()
263{
264 this_format = this_emulation->format;
265
266 if (this_emulation->leading_underscore == 2)
267 this_emulation->leading_underscore = this_format->dfl_leading_underscore;
268
269 if (this_emulation->default_endian != 2)
270 target_big_endian = this_emulation->default_endian;
271
272 if (this_emulation->fake_label_name == 0)
273 {
274 if (this_emulation->leading_underscore)
275 this_emulation->fake_label_name = "L0\001";
276 else
277 /* What other parameters should we test? */
278 this_emulation->fake_label_name = ".L0\001";
279 }
280}
281#endif
282
283/*
284 * Since it is easy to do here we interpret the special arg "-"
285 * to mean "use stdin" and we set that argv[] pointing to "".
286 * After we have munged argv[], the only things left are source file
287 * name(s) and ""(s) denoting stdin. These file names are used
288 * (perhaps more than once) later.
289 *
290 * check for new machine-dep cmdline options in
291 * md_parse_option definitions in config/tc-*.c
292 */
293
294static void
295parse_args (pargc, pargv)
296 int *pargc;
297 char ***pargv;
298{
299 int old_argc, new_argc;
300 char **old_argv, **new_argv;
301
302 /* Starting the short option string with '-' is for programs that
303 expect options and other ARGV-elements in any order and that care about
304 the ordering of the two. We describe each non-option ARGV-element
305 as if it were the argument of an option with character code 1. */
306
307 char *shortopts;
308 extern CONST char *md_shortopts;
309 static const char std_shortopts[] =
310 {
311 '-', 'J',
312#ifndef WORKING_DOT_WORD
313 /* -K is not meaningful if .word is not being hacked. */
314 'K',
315#endif
316 'L', 'M', 'R', 'W', 'Z', 'f', 'a', ':', ':', 'D', 'I', ':', 'o', ':',
317#ifndef VMS
318 /* -v takes an argument on VMS, so we don't make it a generic
319 option. */
320 'v',
321#endif
322 'w', 'X',
323 /* New option for extending instruction set (see also --itbl below) */
324 't', ':',
325 '\0'
326 };
327 struct option *longopts;
328 extern struct option md_longopts[];
329 extern size_t md_longopts_size;
330 static const struct option std_longopts[] = {
331#define OPTION_HELP (OPTION_STD_BASE)
332 {"help", no_argument, NULL, OPTION_HELP},
333 {"keep-locals", no_argument, NULL, 'L'},
334 {"mri", no_argument, NULL, 'M'},
335#define OPTION_NOCPP (OPTION_STD_BASE + 1)
336 {"nocpp", no_argument, NULL, OPTION_NOCPP},
337#define OPTION_STATISTICS (OPTION_STD_BASE + 2)
338 {"statistics", no_argument, NULL, OPTION_STATISTICS},
339#define OPTION_VERSION (OPTION_STD_BASE + 3)
340 {"version", no_argument, NULL, OPTION_VERSION},
341#define OPTION_DUMPCONFIG (OPTION_STD_BASE + 4)
342 {"dump-config", no_argument, NULL, OPTION_DUMPCONFIG},
343#define OPTION_VERBOSE (OPTION_STD_BASE + 5)
344 {"verbose", no_argument, NULL, OPTION_VERBOSE},
345#define OPTION_EMULATION (OPTION_STD_BASE + 6)
346 {"emulation", required_argument, NULL, OPTION_EMULATION},
347#define OPTION_DEFSYM (OPTION_STD_BASE + 7)
348 {"defsym", required_argument, NULL, OPTION_DEFSYM},
349#define OPTION_INSTTBL (OPTION_STD_BASE + 8)
350 /* New option for extending instruction set (see also -t above).
351 The "-t file" or "--itbl file" option extends the basic set of
352 valid instructions by reading "file", a text file containing a
353 list of instruction formats. The additional opcodes and their
354 formats are added to the built-in set of instructions, and
355 mnemonics for new registers may also be defined. */
356 {"itbl", required_argument, NULL, OPTION_INSTTBL},
357#define OPTION_LISTING_LHS_WIDTH (OPTION_STD_BASE + 9)
358 {"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH},
359#define OPTION_LISTING_LHS_WIDTH2 (OPTION_STD_BASE + 10)
360 {"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2},
361#define OPTION_LISTING_RHS_WIDTH (OPTION_STD_BASE + 11)
362 {"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH},
363#define OPTION_LISTING_CONT_LINES (OPTION_STD_BASE + 12)
364 {"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES},
365#define OPTION_DEPFILE (OPTION_STD_BASE + 13)
366 {"MD", required_argument, NULL, OPTION_DEPFILE},
367#define OPTION_GSTABS (OPTION_STD_BASE + 14)
368 {"gstabs", no_argument, NULL, OPTION_GSTABS},
369#define OPTION_STRIP_LOCAL_ABSOLUTE (OPTION_STD_BASE + 15)
370 {"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE},
371#define OPTION_TRADITIONAL_FORMAT (OPTION_STD_BASE + 16)
fac0d250
RH		 372 {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
373#define OPTION_GDWARF2 (OPTION_STD_BASE + 17)
374 {"gdwarf2", no_argument, NULL, OPTION_GDWARF2}
252b5132
RH		 375 };
376
377 /* Construct the option lists from the standard list and the
378 target dependent list. */
379 shortopts = concat (std_shortopts, md_shortopts, (char *) NULL);
380 longopts = (struct option *) xmalloc (sizeof (std_longopts) + md_longopts_size);
381 memcpy (longopts, std_longopts, sizeof (std_longopts));
382 memcpy ((char *) longopts + sizeof (std_longopts),
383 md_longopts, md_longopts_size);
384
385 /* Make a local copy of the old argv. */
386 old_argc = *pargc;
387 old_argv = *pargv;
388
389 /* Initialize a new argv that contains no options. */
390 new_argv = (char **) xmalloc (sizeof (char *) * (old_argc + 1));
391 new_argv[0] = old_argv[0];
392 new_argc = 1;
393 new_argv[new_argc] = NULL;
394
395 while (1)
396 {
397 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
398 indicate a long option. */
399 int longind;
400 int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts,
401 &longind);
402
403 if (optc == -1)
404 break;
405
406 switch (optc)
407 {
408 default:
409 /* md_parse_option should return 1 if it recognizes optc,
410 0 if not. */
411 if (md_parse_option (optc, optarg) != 0)
412 break;
413 /* `-v' isn't included in the general short_opts list, so check for
414 it explicity here before deciding we've gotten a bad argument. */
415 if (optc == 'v')
416 {
417#ifdef VMS
418 /* Telling getopt to treat -v's value as optional can result
419 in it picking up a following filename argument here. The
420 VMS code in md_parse_option can return 0 in that case,
421 but it has no way of pushing the filename argument back. */
422 if (optarg && *optarg)
423 new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL;
424 else
425#else
426 case 'v':
427#endif
428 case OPTION_VERBOSE:
429 print_version_id ();
430 break;
431 }
432 /*FALLTHRU*/
433
434 case '?':
435 exit (EXIT_FAILURE);
436
437 case 1: /* File name. */
438 if (!strcmp (optarg, "-"))
439 optarg = "";
440 new_argv[new_argc++] = optarg;
441 new_argv[new_argc] = NULL;
442 break;
443
444 case OPTION_HELP:
445 show_usage (stdout);
446 exit (EXIT_SUCCESS);
447
448 case OPTION_NOCPP:
449 break;
450
451 case OPTION_STATISTICS:
452 flag_print_statistics = 1;
453 break;
454
455 case OPTION_STRIP_LOCAL_ABSOLUTE:
456 flag_strip_local_absolute = 1;
457 break;
458
459 case OPTION_TRADITIONAL_FORMAT:
460 flag_traditional_format = 1;
461 break;
462
463 case OPTION_VERSION:
464 /* This output is intended to follow the GNU standards document. */
465 printf (_("GNU assembler %s\n"), VERSION);
466 printf (_("Copyright 1997 Free Software Foundation, Inc.\n"));
467 printf (_("\
468This program is free software; you may redistribute it under the terms of\n\
469the GNU General Public License. This program has absolutely no warranty.\n"));
470 printf (_("This assembler was configured for a target of `%s'.\n"),
471 TARGET_ALIAS);
472 exit (EXIT_SUCCESS);
473
474 case OPTION_EMULATION:
475#ifdef USE_EMULATIONS
476 if (strcmp (optarg, this_emulation->name))
477 as_fatal (_("multiple emulation names specified"));
478#else
479 as_fatal (_("emulations not handled in this configuration"));
480#endif
481 break;
482
483 case OPTION_DUMPCONFIG:
484 fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS);
485 fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL);
486 fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU);
487#ifdef TARGET_OBJ_FORMAT
488 fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT);
489#endif
490#ifdef TARGET_FORMAT
491 fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT);
492#endif
493 exit (EXIT_SUCCESS);
494
495 case OPTION_DEFSYM:
496 {
497 char *s;
498 long i;
499 struct defsym_list *n;
500
501 for (s = optarg; *s != '\0' && *s != '='; s++)
502 ;
503 if (*s == '\0')
504 as_fatal (_("bad defsym; format is --defsym name=value"));
505 *s++ = '\0';
506 i = strtol (s, (char **) NULL, 0);
507 n = (struct defsym_list *) xmalloc (sizeof *n);
508 n->next = defsyms;
509 n->name = optarg;
510 n->value = i;
511 defsyms = n;
512 }
513 break;
514
515 case OPTION_INSTTBL:
516 case 't':
517 {
518 /* optarg is the name of the file containing the instruction
519 formats, opcodes, register names, etc. */
520 struct itbl_file_list *n;
521
522 if (optarg == NULL)
523 {
524 as_warn ( _("No file name following -t option\n") );
525 break;
526 }
527
528 n = (struct itbl_file_list *) xmalloc (sizeof *n);
529 n->next = itbl_files;
530 n->name = optarg;
531 itbl_files = n;
532
533 /* Parse the file and add the new instructions to our internal
534 table. If multiple instruction tables are specified, the
535 information from this table gets appended onto the existing
536 internal table. */
537 itbl_files->name = xstrdup (optarg);
538 if (itbl_parse (itbl_files->name) != 0)
539 {
540 fprintf (stderr, _("Failed to read instruction table %s\n"),
541 itbl_files->name);
542 exit (EXIT_SUCCESS);
543 }
544 }
545 break;
546
547 case OPTION_DEPFILE:
548 start_dependencies (optarg);
549 break;
550
551 case OPTION_GSTABS:
552 debug_type = DEBUG_STABS;
553 break;
554
fac0d250
RH		 555 case OPTION_GDWARF2:
556 debug_type = DEBUG_DWARF2;
557 break;
558
252b5132
RH		 559 case 'J':
560 flag_signed_overflow_ok = 1;
561 break;
562
563#ifndef WORKING_DOT_WORD
564 case 'K':
565 flag_warn_displacement = 1;
566 break;
567#endif
568
569 case 'L':
570 flag_keep_locals = 1;
571 break;
572
573 case OPTION_LISTING_LHS_WIDTH:
574 listing_lhs_width = atoi(optarg);
575 if (listing_lhs_width_second < listing_lhs_width)
576 listing_lhs_width_second = listing_lhs_width;
577 break;
578 case OPTION_LISTING_LHS_WIDTH2:
579 {
580 int tmp = atoi(optarg);
581 if (tmp > listing_lhs_width)
582 listing_lhs_width_second = tmp;
583 }
584 break;
585 case OPTION_LISTING_RHS_WIDTH:
586 listing_rhs_width = atoi(optarg);
587 break;
588 case OPTION_LISTING_CONT_LINES:
589 listing_lhs_cont_lines = atoi(optarg);
590 break;
591
592 case 'M':
593 flag_mri = 1;
594#ifdef TC_M68K
595 flag_m68k_mri = 1;
596#endif
597 break;
598
599 case 'R':
600 flag_readonly_data_in_text = 1;
601 break;
602
603 case 'W':
604 flag_no_warnings = 1;
605 break;
606
607 case 'Z':
608 flag_always_generate_output = 1;
609 break;
610
611 case 'a':
612 if (optarg)
613 {
614 while (*optarg)
615 {
616 switch (*optarg)
617 {
618 case 'c':
619 listing |= LISTING_NOCOND;
620 break;
621 case 'd':
622 listing |= LISTING_NODEBUG;
623 break;
624 case 'h':
625 listing |= LISTING_HLL;
626 break;
627 case 'l':
628 listing |= LISTING_LISTING;
629 break;
630 case 'm':
631 listing |= LISTING_MACEXP;
632 break;
633 case 'n':
634 listing |= LISTING_NOFORM;
635 break;
636 case 's':
637 listing |= LISTING_SYMBOLS;
638 break;
639 case '=':
640 listing_filename = xstrdup (optarg + 1);
641 optarg += strlen (listing_filename);
642 break;
643 default:
644 as_fatal (_("invalid listing option `%c'"), *optarg);
645 break;
646 }
647 optarg++;
648 }
649 }
650 if (!listing)
651 listing = LISTING_DEFAULT;
652 break;
653
654 case 'D':
655 /* DEBUG is implemented: it debugs different */
656 /* things from other people's assemblers. */
657 flag_debug = 1;
658 break;
659
660 case 'f':
661 flag_no_comments = 1;
662 break;
663
664 case 'I':
665 { /* Include file directory */
666 char *temp = xstrdup (optarg);
667 add_include_dir (temp);
668 break;
669 }
670
671 case 'o':
672 out_file_name = xstrdup (optarg);
673 break;
674
675 case 'w':
676 break;
677
678 case 'X':
679 /* -X means treat warnings as errors */
680 break;
681 }
682 }
683
684 free (shortopts);
685 free (longopts);
686
687 *pargc = new_argc;
688 *pargv = new_argv;
689}
690
691static long start_time;
692
693int
694main (argc, argv)
695 int argc;
696 char **argv;
697{
698 int macro_alternate;
699 int macro_strip_at;
700 int keep_it;
701
702 start_time = get_run_time ();
703
704#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
705 setlocale (LC_MESSAGES, "");
706#endif
707 bindtextdomain (PACKAGE, LOCALEDIR);
708 textdomain (PACKAGE);
709
710 if (debug_memory)
711 {
712#ifdef BFD_ASSEMBLER
713 extern long _bfd_chunksize;
714 _bfd_chunksize = 64;
715#endif
716 chunksize = 64;
717 }
718
719#ifdef HOST_SPECIAL_INIT
720 HOST_SPECIAL_INIT (argc, argv);
721#endif
722
723 myname = argv[0];
724 xmalloc_set_program_name (myname);
725
726 START_PROGRESS (myname, 0);
727
728#ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
729#define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
730#endif
731
732 out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
733
734 hex_init ();
735#ifdef BFD_ASSEMBLER
736 bfd_init ();
737 bfd_set_error_program_name (myname);
738#endif
739
740#ifdef USE_EMULATIONS
741 select_emulation_mode (argc, argv);
742#endif
743
744 PROGRESS (1);
745 symbol_begin ();
746 frag_init ();
747 subsegs_begin ();
748 parse_args (&argc, &argv);
749 read_begin ();
750 input_scrub_begin ();
751 expr_begin ();
752
753 if (flag_print_statistics)
754 xatexit (dump_statistics);
755
756 macro_alternate = 0;
757 macro_strip_at = 0;
758#ifdef TC_I960
759 macro_strip_at = flag_mri;
760#endif
761#ifdef TC_A29K
762 /* For compatibility with the AMD 29K family macro assembler
763 specification. */
764 macro_alternate = 1;
765 macro_strip_at = 1;
766#endif
767
768 macro_init (macro_alternate, flag_mri, macro_strip_at, macro_expr);
769
770 PROGRESS (1);
771
772#ifdef BFD_ASSEMBLER
773 output_file_create (out_file_name);
774 assert (stdoutput != 0);
775#endif
776
777#ifdef tc_init_after_args
778 tc_init_after_args ();
779#endif
780
781 itbl_init ();
782
783 /* Now that we have fully initialized, and have created the output
784 file, define any symbols requested by --defsym command line
785 arguments. */
786 while (defsyms != NULL)
787 {
788 symbolS *sym;
789 struct defsym_list *next;
790
791 sym = symbol_new (defsyms->name, absolute_section, defsyms->value,
792 &zero_address_frag);
793 symbol_table_insert (sym);
794 next = defsyms->next;
795 free (defsyms);
796 defsyms = next;
797 }
798
799 PROGRESS (1);
800
801 perform_an_assembly_pass (argc, argv); /* Assemble it. */
802
803 cond_finish_check (-1);
804
805#ifdef md_end
806 md_end ();
807#endif
808
809 if (seen_at_least_1_file ()
810 && (flag_always_generate_output || had_errors () == 0))
811 keep_it = 1;
812 else
813 keep_it = 0;
814
815#if defined (BFD_ASSEMBLER) || !defined (BFD)
816 /* This used to be done at the start of write_object_file in
817 write.c, but that caused problems when doing listings when
818 keep_it was zero. This could probably be moved above md_end, but
819 I didn't want to risk the change. */
820 subsegs_finish ();
821#endif
822
823 if (keep_it)
824 write_object_file ();
825
826#ifndef NO_LISTING
827 listing_print (listing_filename);
828#endif
829
830#ifndef OBJ_VMS /* does its own file handling */
831#ifndef BFD_ASSEMBLER
832 if (keep_it)
833#endif
834 output_file_close (out_file_name);
835#endif
836
837 if (had_errors () > 0 && ! flag_always_generate_output)
838 keep_it = 0;
839
840 if (!keep_it)
841 unlink (out_file_name);
842
843 input_scrub_end ();
844
845 END_PROGRESS (myname);
846
847 /* Use xexit instead of return, because under VMS environments they
848 may not place the same interpretation on the value given. */
849 if (had_errors () > 0)
850 xexit (EXIT_FAILURE);
851
852 /* Only generate dependency file if assembler was successful. */
853 print_dependencies ();
854
855 xexit (EXIT_SUCCESS);
856}
857
858static void
859dump_statistics ()
860{
861#ifdef HAVE_SBRK
862 char *lim = (char *) sbrk (0);
863#endif
864 long run_time = get_run_time () - start_time;
865
866 fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"),
867 myname, run_time / 1000000, run_time % 1000000);
868#ifdef HAVE_SBRK
869 fprintf (stderr, _("%s: data size %ld\n"),
870 myname, (long) (lim - (char *) &environ));
871#endif
872
873 subsegs_print_statistics (stderr);
874 write_print_statistics (stderr);
875 symbol_print_statistics (stderr);
876 read_print_statistics (stderr);
877
878#ifdef tc_print_statistics
879 tc_print_statistics (stderr);
880#endif
881#ifdef obj_print_statistics
882 obj_print_statistics (stderr);
883#endif
884}
885\f
886
887/* perform_an_assembly_pass()
888 *
889 * Here to attempt 1 pass over each input file.
890 * We scan argv[*] looking for filenames or exactly "" which is
891 * shorthand for stdin. Any argv that is NULL is not a file-name.
892 * We set need_pass_2 TRUE if, after this, we still have unresolved
893 * expressions of the form (unknown value)+-(unknown value).
894 *
895 * Note the un*x semantics: there is only 1 logical input file, but it
896 * may be a catenation of many 'physical' input files.
897 */
898static void
899perform_an_assembly_pass (argc, argv)
900 int argc;
901 char **argv;
902{
903 int saw_a_file = 0;
904#ifdef BFD_ASSEMBLER
905 flagword applicable;
906#endif
907
908 need_pass_2 = 0;
909
910#ifndef BFD_ASSEMBLER
911#ifdef MANY_SEGMENTS
912 {
913 unsigned int i;
914 for (i = SEG_E0; i < SEG_UNKNOWN; i++)
915 segment_info[i].fix_root = 0;
916 }
917 /* Create the three fixed ones */
918 {
919 segT seg;
920
921#ifdef TE_APOLLO
922 seg = subseg_new (".wtext", 0);
923#else
924 seg = subseg_new (".text", 0);
925#endif
926 assert (seg == SEG_E0);
927 seg = subseg_new (".data", 0);
928 assert (seg == SEG_E1);
929 seg = subseg_new (".bss", 0);
930 assert (seg == SEG_E2);
931#ifdef TE_APOLLO
932 create_target_segments ();
933#endif
934 }
935
936#else /* not MANY_SEGMENTS */
937 text_fix_root = NULL;
938 data_fix_root = NULL;
939 bss_fix_root = NULL;
940#endif /* not MANY_SEGMENTS */
941#else /* BFD_ASSEMBLER */
942 /* Create the standard sections, and those the assembler uses
943 internally. */
944 text_section = subseg_new (TEXT_SECTION_NAME, 0);
945 data_section = subseg_new (DATA_SECTION_NAME, 0);
946 bss_section = subseg_new (BSS_SECTION_NAME, 0);
947 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
948 to have relocs, otherwise we don't find out in time. */
949 applicable = bfd_applicable_section_flags (stdoutput);
950 bfd_set_section_flags (stdoutput, text_section,
951 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
952 | SEC_CODE | SEC_READONLY));
252b5132 953 bfd_set_section_flags (stdoutput, data_section,
a33132fd
ILT		 954 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
955 | SEC_DATA));
252b5132
RH		 956 bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC);
957 seg_info (bss_section)->bss = 1;
958 subseg_new (BFD_ABS_SECTION_NAME, 0);
959 subseg_new (BFD_UND_SECTION_NAME, 0);
960 reg_section = subseg_new ("*GAS `reg' section*", 0);
961 expr_section = subseg_new ("*GAS `expr' section*", 0);
962
963#endif /* BFD_ASSEMBLER */
964
965 subseg_set (text_section, 0);
966
967 /* This may add symbol table entries, which requires having an open BFD,
968 and sections already created, in BFD_ASSEMBLER mode. */
969 md_begin ();
970
971#ifdef obj_begin
972 obj_begin ();
973#endif
974
975 argv++; /* skip argv[0] */
976 argc--; /* skip argv[0] */
977 while (argc--)
978 {
979 if (*argv)
980 { /* Is it a file-name argument? */
981 PROGRESS (1);
982 saw_a_file++;
983 /* argv->"" if stdin desired, else->filename */
984 read_a_source_file (*argv);
985 }
986 argv++; /* completed that argv */
987 }
988 if (!saw_a_file)
989 read_a_source_file ("");
990} /* perform_an_assembly_pass() */
991
992/* The interface between the macro code and gas expression handling. */
993
994static int
995macro_expr (emsg, idx, in, val)
996 const char *emsg;
997 int idx;
998 sb *in;
999 int *val;
1000{
1001 char *hold;
1002 expressionS ex;
1003
1004 sb_terminate (in);
1005
1006 hold = input_line_pointer;
1007 input_line_pointer = in->ptr + idx;
1008 expression (&ex);
1009 idx = input_line_pointer - in->ptr;
1010 input_line_pointer = hold;
1011
1012 if (ex.X_op != O_constant)
1013 as_bad ("%s", emsg);
1014
1015 *val = (int) ex.X_add_number;
1016
1017 return idx;
1018}
1019
1020/* end of as.c */
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