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[deliverable/binutils-gdb.git] / gas / as.c
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252b5132 1/* as.c - GAS main program.
f7e42eb4 2 Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
2a538ba5 3 1999, 2000, 2001, 2002
252b5132
RH		 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
76b0a8c0 21 02111-1307, USA. */
252b5132 22
76b0a8c0 23/* Main program for AS; a 32-bit assembler of GNU.
252b5132
RH		 24 * Understands command arguments.
25 * Has a few routines that don't fit in other modules because they
26 * are shared.
27 *
252b5132
RH		 28 * bugs
29 *
30 * : initialisers
31 * Since no-one else says they will support them in future: I
32 * don't support them now.
252b5132
RH		 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"
bccba5f0 44#include "dwarf2dbg.h"
252b5132 45
84be4d71
ILT		 46#ifdef HAVE_ITBL_CPU
47#include "itbl-ops.h"
48#else
252b5132
RH		 49#define itbl_parse(itbl_file) 1
50#define itbl_init()
51#endif
52
53#ifdef HAVE_SBRK
54#ifdef NEED_DECLARATION_SBRK
55extern PTR sbrk ();
56#endif
57#endif
58
59static void show_usage PARAMS ((FILE *));
60static void parse_args PARAMS ((int *, char ***));
61static void dump_statistics PARAMS ((void));
62static void perform_an_assembly_pass PARAMS ((int argc, char **argv));
63static int macro_expr PARAMS ((const char *, int, sb *, int *));
64
76b0a8c0
KH		 65/* True if a listing is wanted. */
66int listing;
252b5132 67
76b0a8c0
KH		 68/* Name of listing file. */
69static char *listing_filename = NULL;
252b5132
RH		 70
71/* Type of debugging to generate. */
72
4dc7ead9 73enum debug_info_type debug_type = DEBUG_UNSPECIFIED;
252b5132
RH		 74
75/* Maximum level of macro nesting. */
252b5132
RH		 76int max_macro_nest = 100;
77
76b0a8c0
KH		 78/* argv[0] */
79char *myname;
252b5132
RH		 80#ifdef BFD_ASSEMBLER
81segT reg_section, expr_section;
82segT 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. */
87int 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. */
91int 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
30a2b4ef 96struct defsym_list {
252b5132
RH		 97 struct defsym_list *next;
98 char *name;
99 valueT value;
100};
101
102static struct defsym_list *defsyms;
103
76b0a8c0 104/* Keep a record of the itbl files we read in. */
252b5132 105
30a2b4ef 106struct itbl_file_list {
252b5132
RH		 107 struct itbl_file_list *next;
108 char *name;
109};
110
111static struct itbl_file_list *itbl_files;
112\f
252b5132
RH		 113#ifdef USE_EMULATIONS
114#define EMULATION_ENVIRON "AS_EMULATION"
115
116extern struct emulation mipsbelf, mipslelf, mipself;
117extern struct emulation mipsbecoff, mipslecoff, mipsecoff;
4c63da97 118extern struct emulation i386coff, i386elf, i386aout;
3bcbcc3d 119extern struct emulation crisaout, criself;
252b5132
RH		 120
121static struct emulation *const emulations[] = { EMULATIONS };
122static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]);
123
124static void select_emulation_mode PARAMS ((int, char **));
125
126static void
127select_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
76b0a8c0 145 p = argv[i + 1];
252b5132
RH		 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
172const char *
173default_emul_bfd_name ()
174{
175 abort ();
176 return NULL;
177}
178
179void
180common_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
4c63da97
AM		 201void
202print_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"),
403487ec 211 VERSION, TARGET_ALIAS, BFD_VERSION_STRING);
4c63da97
AM		 212#else
213 fprintf (stderr, _("GNU assembler version %s (%s)"), VERSION, TARGET_ALIAS);
214#endif
215 fprintf (stderr, "\n");
216}
217
218static void
219show_usage (stream)
220 FILE *stream;
221{
222 fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname);
223
224 fprintf (stream, _("\
225Options:\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\
4c63da97
AM		 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=[");
76b0a8c0 248 for (i = 0; i < n_emulations - 1; i++)
4c63da97
AM		 249 fprintf (stream, "%s | ", emulations[i]->name);
250 fprintf (stream, "%s]\n", emulations[i]->name);
251
252 def_em = getenv (EMULATION_ENVIRON);
76b0a8c0 253 if (!def_em)
4c63da97
AM		 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, _("\
ea20a7da
CC		 268 --target-help show target specific options\n"));
269 fprintf (stream, _("\
4c63da97
AM		 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
c20f4f8c 326 fputc ('\n', stream);
8ad3436c 327 fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
4c63da97
AM		 328}
329
76b0a8c0
KH		 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. */
252b5132
RH		 338
339static void
340parse_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;
30a2b4ef
KH		 354 static const char std_shortopts[] = {
355 '-', 'J',
252b5132 356#ifndef WORKING_DOT_WORD
30a2b4ef
KH		 357 /* -K is not meaningful if .word is not being hacked. */
358 'K',
252b5132 359#endif
30a2b4ef 360 'L', 'M', 'R', 'W', 'Z', 'f', 'a', ':', ':', 'D', 'I', ':', 'o', ':',
252b5132 361#ifndef VMS
30a2b4ef
KH		 362 /* -v takes an argument on VMS, so we don't make it a generic
363 option. */
364 'v',
252b5132 365#endif
30a2b4ef
KH		 366 'w', 'X',
367 /* New option for extending instruction set (see also --itbl below) */
368 't', ':',
369 '\0'
370 };
252b5132
RH		 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)
3c5cdb54 404 {"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2},
252b5132
RH		 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)
fac0d250
RH		 416 {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
417#define OPTION_GDWARF2 (OPTION_STD_BASE + 17)
2bdd6cf5
GK		 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},
ea20a7da
CC		 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)
2bdd6cf5 425 {"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL}
d8374dcd
HPN		 426 /* When you add options here, check that they do not collide with
427 OPTION_MD_BASE. See as.h. */
252b5132
RH		 428 };
429
beb2de9b
AC		 430 /* Construct the option lists from the standard list and the target
431 dependent list. Include space for an extra NULL option and
76b0a8c0 432 always NULL terminate. */
252b5132 433 shortopts = concat (std_shortopts, md_shortopts, (char *) NULL);
beb2de9b
AC		 434 longopts = (struct option *) xmalloc (sizeof (std_longopts)
435 + md_longopts_size
436 + sizeof (struct option));
252b5132
RH		 437 memcpy (longopts, std_longopts, sizeof (std_longopts));
438 memcpy ((char *) longopts + sizeof (std_longopts),
439 md_longopts, md_longopts_size);
beb2de9b
AC		 440 memset ((char *) longopts + sizeof (std_longopts) + md_longopts_size,
441 0, sizeof (struct option));
252b5132
RH		 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)
30a2b4ef 481 new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL;
252b5132
RH		 482 else
483#else
484 case 'v':
485#endif
486 case OPTION_VERBOSE:
487 print_version_id ();
488 break;
489 }
76b0a8c0 490 /* Fall through. */
252b5132
RH		 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;
ef99799a 501
ea20a7da
CC		 502 case OPTION_TARGET_HELP:
503 md_show_usage (stdout);
504 exit (EXIT_SUCCESS);
252b5132
RH		 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. */
edde18a5 527#ifdef BFD_ASSEMBLER
6c19f338 528 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING);
edde18a5
AM		 529#else
530 printf (_("GNU assembler %s\n"), VERSION);
531#endif
2a538ba5 532 printf (_("Copyright 2002 Free Software Foundation, Inc.\n"));
252b5132
RH		 533 printf (_("\
534This program is free software; you may redistribute it under the terms of\n\
535the GNU General Public License. This program has absolutely no warranty.\n"));
536 printf (_("This assembler was configured for a target of `%s'.\n"),
537 TARGET_ALIAS);
538 exit (EXIT_SUCCESS);
539
540 case OPTION_EMULATION:
541#ifdef USE_EMULATIONS
542 if (strcmp (optarg, this_emulation->name))
543 as_fatal (_("multiple emulation names specified"));
544#else
545 as_fatal (_("emulations not handled in this configuration"));
546#endif
547 break;
548
549 case OPTION_DUMPCONFIG:
550 fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS);
551 fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL);
552 fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU);
553#ifdef TARGET_OBJ_FORMAT
554 fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT);
555#endif
556#ifdef TARGET_FORMAT
557 fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT);
558#endif
559 exit (EXIT_SUCCESS);
560
561 case OPTION_DEFSYM:
562 {
563 char *s;
a38cf1db 564 valueT i;
252b5132
RH		 565 struct defsym_list *n;
566
567 for (s = optarg; *s != '\0' && *s != '='; s++)
568 ;
569 if (*s == '\0')
570 as_fatal (_("bad defsym; format is --defsym name=value"));
571 *s++ = '\0';
a38cf1db
AM		 572#ifdef BFD_ASSEMBLER
573 i = bfd_scan_vma (s, (const char **) NULL, 0);
574#else
252b5132 575 i = strtol (s, (char **) NULL, 0);
a38cf1db 576#endif
252b5132
RH		 577 n = (struct defsym_list *) xmalloc (sizeof *n);
578 n->next = defsyms;
579 n->name = optarg;
580 n->value = i;
581 defsyms = n;
582 }
583 break;
584
585 case OPTION_INSTTBL:
586 case 't':
587 {
76b0a8c0
KH		 588 /* optarg is the name of the file containing the instruction
589 formats, opcodes, register names, etc. */
252b5132
RH		 590 struct itbl_file_list *n;
591
592 if (optarg == NULL)
593 {
0e389e77 594 as_warn (_("no file name following -t option"));
252b5132
RH		 595 break;
596 }
76b0a8c0 597
252b5132
RH		 598 n = (struct itbl_file_list *) xmalloc (sizeof *n);
599 n->next = itbl_files;
600 n->name = optarg;
601 itbl_files = n;
602
603 /* Parse the file and add the new instructions to our internal
76b0a8c0
KH		 604 table. If multiple instruction tables are specified, the
605 information from this table gets appended onto the existing
606 internal table. */
252b5132
RH		 607 itbl_files->name = xstrdup (optarg);
608 if (itbl_parse (itbl_files->name) != 0)
0e389e77
AM		 609 as_fatal (_("failed to read instruction table %s\n"),
610 itbl_files->name);
252b5132
RH		 611 }
612 break;
613
614 case OPTION_DEPFILE:
615 start_dependencies (optarg);
616 break;
617
618 case OPTION_GSTABS:
619 debug_type = DEBUG_STABS;
620 break;
76b0a8c0 621
fac0d250
RH		 622 case OPTION_GDWARF2:
623 debug_type = DEBUG_DWARF2;
624 break;
625
252b5132
RH		 626 case 'J':
627 flag_signed_overflow_ok = 1;
628 break;
629
630#ifndef WORKING_DOT_WORD
631 case 'K':
632 flag_warn_displacement = 1;
633 break;
634#endif
635
636 case 'L':
637 flag_keep_locals = 1;
638 break;
639
640 case OPTION_LISTING_LHS_WIDTH:
76b0a8c0 641 listing_lhs_width = atoi (optarg);
252b5132
RH		 642 if (listing_lhs_width_second < listing_lhs_width)
643 listing_lhs_width_second = listing_lhs_width;
644 break;
645 case OPTION_LISTING_LHS_WIDTH2:
646 {
76b0a8c0 647 int tmp = atoi (optarg);
252b5132
RH		 648 if (tmp > listing_lhs_width)
649 listing_lhs_width_second = tmp;
650 }
651 break;
652 case OPTION_LISTING_RHS_WIDTH:
76b0a8c0 653 listing_rhs_width = atoi (optarg);
252b5132
RH		 654 break;
655 case OPTION_LISTING_CONT_LINES:
76b0a8c0 656 listing_lhs_cont_lines = atoi (optarg);
252b5132
RH		 657 break;
658
659 case 'M':
660 flag_mri = 1;
661#ifdef TC_M68K
662 flag_m68k_mri = 1;
663#endif
664 break;
665
666 case 'R':
667 flag_readonly_data_in_text = 1;
668 break;
669
670 case 'W':
671 flag_no_warnings = 1;
672 break;
673
2bdd6cf5
GK		 674 case OPTION_WARN:
675 flag_no_warnings = 0;
676 flag_fatal_warnings = 0;
677 break;
678
679 case OPTION_WARN_FATAL:
680 flag_no_warnings = 0;
681 flag_fatal_warnings = 1;
682 break;
683
252b5132
RH		 684 case 'Z':
685 flag_always_generate_output = 1;
686 break;
687
688 case 'a':
689 if (optarg)
690 {
7f6d05e8
CP		 691 if (md_parse_option (optc, optarg) != 0)
692 break;
693
252b5132
RH		 694 while (*optarg)
695 {
696 switch (*optarg)
697 {
698 case 'c':
699 listing |= LISTING_NOCOND;
700 break;
701 case 'd':
702 listing |= LISTING_NODEBUG;
703 break;
704 case 'h':
705 listing |= LISTING_HLL;
706 break;
707 case 'l':
708 listing |= LISTING_LISTING;
709 break;
710 case 'm':
711 listing |= LISTING_MACEXP;
712 break;
713 case 'n':
714 listing |= LISTING_NOFORM;
715 break;
716 case 's':
717 listing |= LISTING_SYMBOLS;
718 break;
719 case '=':
720 listing_filename = xstrdup (optarg + 1);
721 optarg += strlen (listing_filename);
722 break;
723 default:
724 as_fatal (_("invalid listing option `%c'"), *optarg);
725 break;
726 }
727 optarg++;
728 }
729 }
730 if (!listing)
731 listing = LISTING_DEFAULT;
732 break;
733
734 case 'D':
76b0a8c0
KH		 735 /* DEBUG is implemented: it debugs different
736 things from other people's assemblers. */
252b5132
RH		 737 flag_debug = 1;
738 break;
739
740 case 'f':
741 flag_no_comments = 1;
742 break;
743
744 case 'I':
76b0a8c0 745 { /* Include file directory. */
252b5132
RH		 746 char *temp = xstrdup (optarg);
747 add_include_dir (temp);
748 break;
749 }
750
751 case 'o':
752 out_file_name = xstrdup (optarg);
753 break;
754
755 case 'w':
756 break;
757
758 case 'X':
76b0a8c0 759 /* -X means treat warnings as errors. */
252b5132
RH		 760 break;
761 }
762 }
763
764 free (shortopts);
765 free (longopts);
766
767 *pargc = new_argc;
768 *pargv = new_argv;
acebd4ce
AS		 769
770#ifdef md_after_parse_args
771 md_after_parse_args ();
772#endif
252b5132
RH		 773}
774
775static long start_time;
776
a80076a1
NC		 777int main PARAMS ((int, char **));
778
76b0a8c0 779int
252b5132
RH		 780main (argc, argv)
781 int argc;
782 char **argv;
783{
784 int macro_alternate;
785 int macro_strip_at;
786 int keep_it;
787
788 start_time = get_run_time ();
789
790#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
791 setlocale (LC_MESSAGES, "");
3882b010
L		 792#endif
793#if defined (HAVE_SETLOCALE)
794 setlocale (LC_CTYPE, "");
252b5132
RH		 795#endif
796 bindtextdomain (PACKAGE, LOCALEDIR);
797 textdomain (PACKAGE);
798
799 if (debug_memory)
800 {
801#ifdef BFD_ASSEMBLER
802 extern long _bfd_chunksize;
803 _bfd_chunksize = 64;
804#endif
805 chunksize = 64;
806 }
807
808#ifdef HOST_SPECIAL_INIT
809 HOST_SPECIAL_INIT (argc, argv);
810#endif
811
812 myname = argv[0];
813 xmalloc_set_program_name (myname);
814
815 START_PROGRESS (myname, 0);
816
817#ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
818#define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
819#endif
820
821 out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
822
823 hex_init ();
824#ifdef BFD_ASSEMBLER
825 bfd_init ();
826 bfd_set_error_program_name (myname);
827#endif
828
829#ifdef USE_EMULATIONS
830 select_emulation_mode (argc, argv);
831#endif
832
833 PROGRESS (1);
834 symbol_begin ();
835 frag_init ();
836 subsegs_begin ();
76b0a8c0 837 parse_args (&argc, &argv);
252b5132
RH		 838 read_begin ();
839 input_scrub_begin ();
840 expr_begin ();
841
842 if (flag_print_statistics)
843 xatexit (dump_statistics);
844
845 macro_alternate = 0;
846 macro_strip_at = 0;
847#ifdef TC_I960
848 macro_strip_at = flag_mri;
849#endif
850#ifdef TC_A29K
851 /* For compatibility with the AMD 29K family macro assembler
852 specification. */
853 macro_alternate = 1;
854 macro_strip_at = 1;
855#endif
856
857 macro_init (macro_alternate, flag_mri, macro_strip_at, macro_expr);
858
859 PROGRESS (1);
860
861#ifdef BFD_ASSEMBLER
862 output_file_create (out_file_name);
863 assert (stdoutput != 0);
864#endif
865
866#ifdef tc_init_after_args
867 tc_init_after_args ();
868#endif
869
870 itbl_init ();
871
872 /* Now that we have fully initialized, and have created the output
873 file, define any symbols requested by --defsym command line
874 arguments. */
875 while (defsyms != NULL)
876 {
877 symbolS *sym;
878 struct defsym_list *next;
879
880 sym = symbol_new (defsyms->name, absolute_section, defsyms->value,
881 &zero_address_frag);
882 symbol_table_insert (sym);
883 next = defsyms->next;
884 free (defsyms);
885 defsyms = next;
886 }
887
888 PROGRESS (1);
889
76b0a8c0
KH		 890 /* Assemble it. */
891 perform_an_assembly_pass (argc, argv);
252b5132
RH		 892
893 cond_finish_check (-1);
894
895#ifdef md_end
896 md_end ();
897#endif
898
43ad3147 899 /* If we've been collecting dwarf2 .debug_line info, either for
39bb5fe6
RH		 900 assembly debugging or on behalf of the compiler, emit it now. */
901 dwarf2_finish ();
902
252b5132
RH		 903 if (seen_at_least_1_file ()
904 && (flag_always_generate_output || had_errors () == 0))
905 keep_it = 1;
906 else
907 keep_it = 0;
908
909#if defined (BFD_ASSEMBLER) || !defined (BFD)
910 /* This used to be done at the start of write_object_file in
911 write.c, but that caused problems when doing listings when
912 keep_it was zero. This could probably be moved above md_end, but
913 I didn't want to risk the change. */
914 subsegs_finish ();
915#endif
916
917 if (keep_it)
918 write_object_file ();
919
920#ifndef NO_LISTING
921 listing_print (listing_filename);
922#endif
923
924#ifndef OBJ_VMS /* does its own file handling */
925#ifndef BFD_ASSEMBLER
926 if (keep_it)
927#endif
928 output_file_close (out_file_name);
929#endif
930
76b0a8c0
KH		 931 if (flag_fatal_warnings && had_warnings () > 0 && had_errors () == 0)
932 as_bad (_("%d warnings, treating warnings as errors"), had_warnings ());
2bdd6cf5 933
252b5132
RH		 934 if (had_errors () > 0 && ! flag_always_generate_output)
935 keep_it = 0;
936
937 if (!keep_it)
938 unlink (out_file_name);
939
940 input_scrub_end ();
941
942 END_PROGRESS (myname);
943
944 /* Use xexit instead of return, because under VMS environments they
945 may not place the same interpretation on the value given. */
946 if (had_errors () > 0)
947 xexit (EXIT_FAILURE);
948
949 /* Only generate dependency file if assembler was successful. */
950 print_dependencies ();
951
952 xexit (EXIT_SUCCESS);
953}
954
955static void
956dump_statistics ()
957{
958#ifdef HAVE_SBRK
959 char *lim = (char *) sbrk (0);
960#endif
961 long run_time = get_run_time () - start_time;
962
963 fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"),
964 myname, run_time / 1000000, run_time % 1000000);
965#ifdef HAVE_SBRK
966 fprintf (stderr, _("%s: data size %ld\n"),
967 myname, (long) (lim - (char *) &environ));
968#endif
969
970 subsegs_print_statistics (stderr);
971 write_print_statistics (stderr);
972 symbol_print_statistics (stderr);
973 read_print_statistics (stderr);
974
975#ifdef tc_print_statistics
976 tc_print_statistics (stderr);
977#endif
978#ifdef obj_print_statistics
979 obj_print_statistics (stderr);
980#endif
981}
982\f
76b0a8c0
KH		 983/* Here to attempt 1 pass over each input file.
984 We scan argv[*] looking for filenames or exactly "" which is
985 shorthand for stdin. Any argv that is NULL is not a file-name.
986 We set need_pass_2 TRUE if, after this, we still have unresolved
987 expressions of the form (unknown value)+-(unknown value).
252b5132 988
76b0a8c0
KH		 989 Note the un*x semantics: there is only 1 logical input file, but it
990 may be a catenation of many 'physical' input files. */
991
992static void
252b5132
RH		 993perform_an_assembly_pass (argc, argv)
994 int argc;
995 char **argv;
996{
997 int saw_a_file = 0;
998#ifdef BFD_ASSEMBLER
999 flagword applicable;
1000#endif
1001
1002 need_pass_2 = 0;
1003
1004#ifndef BFD_ASSEMBLER
1005#ifdef MANY_SEGMENTS
1006 {
1007 unsigned int i;
1008 for (i = SEG_E0; i < SEG_UNKNOWN; i++)
1009 segment_info[i].fix_root = 0;
1010 }
76b0a8c0 1011 /* Create the three fixed ones. */
252b5132
RH		 1012 {
1013 segT seg;
1014
1015#ifdef TE_APOLLO
1016 seg = subseg_new (".wtext", 0);
1017#else
1018 seg = subseg_new (".text", 0);
1019#endif
1020 assert (seg == SEG_E0);
1021 seg = subseg_new (".data", 0);
1022 assert (seg == SEG_E1);
1023 seg = subseg_new (".bss", 0);
1024 assert (seg == SEG_E2);
1025#ifdef TE_APOLLO
1026 create_target_segments ();
1027#endif
1028 }
1029
1030#else /* not MANY_SEGMENTS */
1031 text_fix_root = NULL;
1032 data_fix_root = NULL;
1033 bss_fix_root = NULL;
1034#endif /* not MANY_SEGMENTS */
1035#else /* BFD_ASSEMBLER */
1036 /* Create the standard sections, and those the assembler uses
1037 internally. */
1038 text_section = subseg_new (TEXT_SECTION_NAME, 0);
1039 data_section = subseg_new (DATA_SECTION_NAME, 0);
1040 bss_section = subseg_new (BSS_SECTION_NAME, 0);
1041 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
76b0a8c0 1042 to have relocs, otherwise we don't find out in time. */
252b5132
RH		 1043 applicable = bfd_applicable_section_flags (stdoutput);
1044 bfd_set_section_flags (stdoutput, text_section,
1045 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1046 | SEC_CODE | SEC_READONLY));
252b5132 1047 bfd_set_section_flags (stdoutput, data_section,
a33132fd
ILT		 1048 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1049 | SEC_DATA));
252b5132
RH		 1050 bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC);
1051 seg_info (bss_section)->bss = 1;
1052 subseg_new (BFD_ABS_SECTION_NAME, 0);
1053 subseg_new (BFD_UND_SECTION_NAME, 0);
1054 reg_section = subseg_new ("*GAS `reg' section*", 0);
1055 expr_section = subseg_new ("*GAS `expr' section*", 0);
1056
1057#endif /* BFD_ASSEMBLER */
1058
1059 subseg_set (text_section, 0);
1060
1061 /* This may add symbol table entries, which requires having an open BFD,
1062 and sections already created, in BFD_ASSEMBLER mode. */
1063 md_begin ();
1064
1065#ifdef obj_begin
1066 obj_begin ();
1067#endif
1068
76b0a8c0
KH		 1069 /* Skip argv[0]. */
1070 argv++;
1071 argc--;
1072
252b5132
RH		 1073 while (argc--)
1074 {
1075 if (*argv)
76b0a8c0 1076 { /* Is it a file-name argument? */
252b5132
RH		 1077 PROGRESS (1);
1078 saw_a_file++;
76b0a8c0 1079 /* argv->"" if stdin desired, else->filename */
252b5132
RH		 1080 read_a_source_file (*argv);
1081 }
76b0a8c0 1082 argv++; /* completed that argv */
252b5132
RH		 1083 }
1084 if (!saw_a_file)
1085 read_a_source_file ("");
76b0a8c0 1086}
252b5132
RH		 1087
1088/* The interface between the macro code and gas expression handling. */
1089
1090static int
1091macro_expr (emsg, idx, in, val)
1092 const char *emsg;
1093 int idx;
1094 sb *in;
1095 int *val;
1096{
1097 char *hold;
1098 expressionS ex;
1099
1100 sb_terminate (in);
1101
1102 hold = input_line_pointer;
1103 input_line_pointer = in->ptr + idx;
1104 expression (&ex);
1105 idx = input_line_pointer - in->ptr;
1106 input_line_pointer = hold;
1107
1108 if (ex.X_op != O_constant)
1109 as_bad ("%s", emsg);
1110
1111 *val = (int) ex.X_add_number;
1112
1113 return idx;
1114}
GDB Binutils - Deliverables
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