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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 | ||
47 | #ifndef HAVE_ITBL_CPU | |
48 | #define itbl_parse(itbl_file) 1 | |
49 | #define itbl_init() | |
50 | #endif | |
51 | ||
52 | #ifdef HAVE_SBRK | |
53 | #ifdef NEED_DECLARATION_SBRK | |
54 | extern PTR sbrk (); | |
55 | #endif | |
56 | #endif | |
57 | ||
58 | static void show_usage PARAMS ((FILE *)); | |
59 | static void parse_args PARAMS ((int *, char ***)); | |
60 | static void dump_statistics PARAMS ((void)); | |
61 | static void perform_an_assembly_pass PARAMS ((int argc, char **argv)); | |
62 | static int macro_expr PARAMS ((const char *, int, sb *, int *)); | |
63 | ||
64 | int listing; /* true if a listing is wanted */ | |
65 | ||
66 | static char *listing_filename = NULL; /* Name of listing file. */ | |
67 | ||
68 | /* Type of debugging to generate. */ | |
69 | ||
70 | enum debug_info_type debug_type = DEBUG_NONE; | |
71 | ||
72 | /* Maximum level of macro nesting. */ | |
73 | ||
74 | int max_macro_nest = 100; | |
75 | ||
76 | char *myname; /* argv[0] */ | |
77 | #ifdef BFD_ASSEMBLER | |
78 | segT reg_section, expr_section; | |
79 | segT text_section, data_section, bss_section; | |
80 | #endif | |
81 | ||
82 | /* The default obstack chunk size. If we set this to zero, the | |
83 | obstack code will use whatever will fit in a 4096 byte block. */ | |
84 | int chunksize = 0; | |
85 | ||
86 | /* To monitor memory allocation more effectively, make this non-zero. | |
87 | Then the chunk sizes for gas and bfd will be reduced. */ | |
88 | int debug_memory = 0; | |
89 | ||
90 | /* We build a list of defsyms as we read the options, and then define | |
91 | them after we have initialized everything. */ | |
92 | ||
93 | struct defsym_list | |
94 | { | |
95 | struct defsym_list *next; | |
96 | char *name; | |
97 | valueT value; | |
98 | }; | |
99 | ||
100 | static struct defsym_list *defsyms; | |
101 | ||
102 | /* Keep a record of the itbl files we read in. */ | |
103 | ||
104 | struct itbl_file_list | |
105 | { | |
106 | struct itbl_file_list *next; | |
107 | char *name; | |
108 | }; | |
109 | ||
110 | static struct itbl_file_list *itbl_files; | |
111 | \f | |
112 | void | |
113 | print_version_id () | |
114 | { | |
115 | static int printed; | |
116 | if (printed) | |
117 | return; | |
118 | printed = 1; | |
119 | ||
120 | #ifdef BFD_ASSEMBLER | |
121 | fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s"), | |
122 | VERSION, TARGET_ALIAS, BFD_VERSION); | |
123 | #else | |
124 | fprintf (stderr, _("GNU assembler version %s (%s)"), VERSION, TARGET_ALIAS); | |
125 | #endif | |
126 | fprintf (stderr, "\n"); | |
127 | } | |
128 | ||
129 | static void | |
130 | show_usage (stream) | |
131 | FILE *stream; | |
132 | { | |
133 | fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname); | |
134 | ||
135 | fprintf (stream, _("\ | |
136 | Options:\n\ | |
137 | -a[sub-option...] turn on listings\n\ | |
138 | Sub-options [default hls]:\n\ | |
139 | c omit false conditionals\n\ | |
140 | d omit debugging directives\n\ | |
141 | h include high-level source\n\ | |
142 | l include assembly\n\ | |
143 | m include macro expansions\n\ | |
144 | n omit forms processing\n\ | |
145 | s include symbols\n\ | |
146 | =file set listing file name (must be last sub-option)\n")); | |
147 | ||
148 | fprintf (stream, _("\ | |
149 | -D produce assembler debugging messages\n\ | |
150 | --defsym SYM=VAL define symbol SYM to given value\n\ | |
151 | -f skip whitespace and comment preprocessing\n\ | |
152 | --gstabs generate stabs debugging information\n\ | |
153 | --help show this message and exit\n\ | |
154 | -I DIR add DIR to search list for .include directives\n\ | |
155 | -J don't warn about signed overflow\n\ | |
156 | -K warn when differences altered for long displacements\n\ | |
157 | -L,--keep-locals keep local symbols (e.g. starting with `L')\n")); | |
158 | ||
159 | fprintf (stream, _("\ | |
160 | -M,--mri assemble in MRI compatibility mode\n\ | |
161 | --MD FILE write dependency information in FILE (default none)\n\ | |
162 | -nocpp ignored\n\ | |
163 | -o OBJFILE name the object-file output OBJFILE (default a.out)\n\ | |
164 | -R fold data section into text section\n\ | |
165 | --statistics print various measured statistics from execution\n\ | |
166 | --strip-local-absolute strip local absolute symbols\n\ | |
167 | --traditional-format Use same format as native assembler when possible\n\ | |
168 | --version print assembler version number and exit\n\ | |
169 | -W suppress warnings\n\ | |
170 | --itbl INSTTBL extend instruction set to include instructions\n\ | |
171 | matching the specifications defined in file INSTTBL\n\ | |
172 | -w ignored\n\ | |
173 | -X ignored\n\ | |
174 | -Z generate object file even after errors\n")); | |
175 | ||
176 | fprintf (stream, _("\ | |
177 | --listing-lhs-width set the width in words of the output data column of\n\ | |
178 | the listing\n\ | |
179 | --listing-lhs-width2 set the width in words of the continuation lines\n\ | |
180 | of the output data column; ignored if smaller than\n\ | |
181 | the width of the first line\n\ | |
182 | --listing-rhs-width set the max width in characters of the lines from\n\ | |
183 | the source file\n\ | |
184 | --listing-cont-lines set the maximum number of continuation lines used\n\ | |
185 | for the output data column of the listing\n")); | |
186 | ||
187 | md_show_usage (stream); | |
188 | ||
189 | fprintf (stream, _("\nReport bugs to bug-gnu-utils@gnu.org\n")); | |
190 | } | |
191 | ||
192 | #ifdef USE_EMULATIONS | |
193 | #define EMULATION_ENVIRON "AS_EMULATION" | |
194 | ||
195 | extern struct emulation mipsbelf, mipslelf, mipself; | |
196 | extern struct emulation mipsbecoff, mipslecoff, mipsecoff; | |
197 | extern struct emulation i386coff, i386elf; | |
198 | ||
199 | static struct emulation *const emulations[] = { EMULATIONS }; | |
200 | static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]); | |
201 | ||
202 | static void select_emulation_mode PARAMS ((int, char **)); | |
203 | ||
204 | static void | |
205 | select_emulation_mode (argc, argv) | |
206 | int argc; | |
207 | char **argv; | |
208 | { | |
209 | int i; | |
210 | char *p, *em = 0; | |
211 | ||
212 | for (i = 1; i < argc; i++) | |
213 | if (!strncmp ("--em", argv[i], 4)) | |
214 | break; | |
215 | ||
216 | if (i == argc) | |
217 | goto do_default; | |
218 | ||
219 | p = strchr (argv[i], '='); | |
220 | if (p) | |
221 | p++; | |
222 | else | |
223 | p = argv[i+1]; | |
224 | ||
225 | if (!p || !*p) | |
226 | as_fatal (_("missing emulation mode name")); | |
227 | em = p; | |
228 | ||
229 | do_default: | |
230 | if (em == 0) | |
231 | em = getenv (EMULATION_ENVIRON); | |
232 | if (em == 0) | |
233 | em = DEFAULT_EMULATION; | |
234 | ||
235 | if (em) | |
236 | { | |
237 | for (i = 0; i < n_emulations; i++) | |
238 | if (!strcmp (emulations[i]->name, em)) | |
239 | break; | |
240 | if (i == n_emulations) | |
241 | as_fatal (_("unrecognized emulation name `%s'"), em); | |
242 | this_emulation = emulations[i]; | |
243 | } | |
244 | else | |
245 | this_emulation = emulations[0]; | |
246 | ||
247 | this_emulation->init (); | |
248 | } | |
249 | ||
250 | const char * | |
251 | default_emul_bfd_name () | |
252 | { | |
253 | abort (); | |
254 | return NULL; | |
255 | } | |
256 | ||
257 | void | |
258 | common_emul_init () | |
259 | { | |
260 | this_format = this_emulation->format; | |
261 | ||
262 | if (this_emulation->leading_underscore == 2) | |
263 | this_emulation->leading_underscore = this_format->dfl_leading_underscore; | |
264 | ||
265 | if (this_emulation->default_endian != 2) | |
266 | target_big_endian = this_emulation->default_endian; | |
267 | ||
268 | if (this_emulation->fake_label_name == 0) | |
269 | { | |
270 | if (this_emulation->leading_underscore) | |
271 | this_emulation->fake_label_name = "L0\001"; | |
272 | else | |
273 | /* What other parameters should we test? */ | |
274 | this_emulation->fake_label_name = ".L0\001"; | |
275 | } | |
276 | } | |
277 | #endif | |
278 | ||
279 | /* | |
280 | * Since it is easy to do here we interpret the special arg "-" | |
281 | * to mean "use stdin" and we set that argv[] pointing to "". | |
282 | * After we have munged argv[], the only things left are source file | |
283 | * name(s) and ""(s) denoting stdin. These file names are used | |
284 | * (perhaps more than once) later. | |
285 | * | |
286 | * check for new machine-dep cmdline options in | |
287 | * md_parse_option definitions in config/tc-*.c | |
288 | */ | |
289 | ||
290 | static void | |
291 | parse_args (pargc, pargv) | |
292 | int *pargc; | |
293 | char ***pargv; | |
294 | { | |
295 | int old_argc, new_argc; | |
296 | char **old_argv, **new_argv; | |
297 | ||
298 | /* Starting the short option string with '-' is for programs that | |
299 | expect options and other ARGV-elements in any order and that care about | |
300 | the ordering of the two. We describe each non-option ARGV-element | |
301 | as if it were the argument of an option with character code 1. */ | |
302 | ||
303 | char *shortopts; | |
304 | extern CONST char *md_shortopts; | |
305 | static const char std_shortopts[] = | |
306 | { | |
307 | '-', 'J', | |
308 | #ifndef WORKING_DOT_WORD | |
309 | /* -K is not meaningful if .word is not being hacked. */ | |
310 | 'K', | |
311 | #endif | |
312 | 'L', 'M', 'R', 'W', 'Z', 'f', 'a', ':', ':', 'D', 'I', ':', 'o', ':', | |
313 | #ifndef VMS | |
314 | /* -v takes an argument on VMS, so we don't make it a generic | |
315 | option. */ | |
316 | 'v', | |
317 | #endif | |
318 | 'w', 'X', | |
319 | /* New option for extending instruction set (see also --itbl below) */ | |
320 | 't', ':', | |
321 | '\0' | |
322 | }; | |
323 | struct option *longopts; | |
324 | extern struct option md_longopts[]; | |
325 | extern size_t md_longopts_size; | |
326 | static const struct option std_longopts[] = { | |
327 | #define OPTION_HELP (OPTION_STD_BASE) | |
328 | {"help", no_argument, NULL, OPTION_HELP}, | |
329 | {"keep-locals", no_argument, NULL, 'L'}, | |
330 | {"mri", no_argument, NULL, 'M'}, | |
331 | #define OPTION_NOCPP (OPTION_STD_BASE + 1) | |
332 | {"nocpp", no_argument, NULL, OPTION_NOCPP}, | |
333 | #define OPTION_STATISTICS (OPTION_STD_BASE + 2) | |
334 | {"statistics", no_argument, NULL, OPTION_STATISTICS}, | |
335 | #define OPTION_VERSION (OPTION_STD_BASE + 3) | |
336 | {"version", no_argument, NULL, OPTION_VERSION}, | |
337 | #define OPTION_DUMPCONFIG (OPTION_STD_BASE + 4) | |
338 | {"dump-config", no_argument, NULL, OPTION_DUMPCONFIG}, | |
339 | #define OPTION_VERBOSE (OPTION_STD_BASE + 5) | |
340 | {"verbose", no_argument, NULL, OPTION_VERBOSE}, | |
341 | #define OPTION_EMULATION (OPTION_STD_BASE + 6) | |
342 | {"emulation", required_argument, NULL, OPTION_EMULATION}, | |
343 | #define OPTION_DEFSYM (OPTION_STD_BASE + 7) | |
344 | {"defsym", required_argument, NULL, OPTION_DEFSYM}, | |
345 | #define OPTION_INSTTBL (OPTION_STD_BASE + 8) | |
346 | /* New option for extending instruction set (see also -t above). | |
347 | The "-t file" or "--itbl file" option extends the basic set of | |
348 | valid instructions by reading "file", a text file containing a | |
349 | list of instruction formats. The additional opcodes and their | |
350 | formats are added to the built-in set of instructions, and | |
351 | mnemonics for new registers may also be defined. */ | |
352 | {"itbl", required_argument, NULL, OPTION_INSTTBL}, | |
353 | #define OPTION_LISTING_LHS_WIDTH (OPTION_STD_BASE + 9) | |
354 | {"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH}, | |
355 | #define OPTION_LISTING_LHS_WIDTH2 (OPTION_STD_BASE + 10) | |
356 | {"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2}, | |
357 | #define OPTION_LISTING_RHS_WIDTH (OPTION_STD_BASE + 11) | |
358 | {"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH}, | |
359 | #define OPTION_LISTING_CONT_LINES (OPTION_STD_BASE + 12) | |
360 | {"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES}, | |
361 | #define OPTION_DEPFILE (OPTION_STD_BASE + 13) | |
362 | {"MD", required_argument, NULL, OPTION_DEPFILE}, | |
363 | #define OPTION_GSTABS (OPTION_STD_BASE + 14) | |
364 | {"gstabs", no_argument, NULL, OPTION_GSTABS}, | |
365 | #define OPTION_STRIP_LOCAL_ABSOLUTE (OPTION_STD_BASE + 15) | |
366 | {"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE}, | |
367 | #define OPTION_TRADITIONAL_FORMAT (OPTION_STD_BASE + 16) | |
368 | {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT} | |
369 | }; | |
370 | ||
371 | /* Construct the option lists from the standard list and the | |
372 | target dependent list. */ | |
373 | shortopts = concat (std_shortopts, md_shortopts, (char *) NULL); | |
374 | longopts = (struct option *) xmalloc (sizeof (std_longopts) + md_longopts_size); | |
375 | memcpy (longopts, std_longopts, sizeof (std_longopts)); | |
376 | memcpy ((char *) longopts + sizeof (std_longopts), | |
377 | md_longopts, md_longopts_size); | |
378 | ||
379 | /* Make a local copy of the old argv. */ | |
380 | old_argc = *pargc; | |
381 | old_argv = *pargv; | |
382 | ||
383 | /* Initialize a new argv that contains no options. */ | |
384 | new_argv = (char **) xmalloc (sizeof (char *) * (old_argc + 1)); | |
385 | new_argv[0] = old_argv[0]; | |
386 | new_argc = 1; | |
387 | new_argv[new_argc] = NULL; | |
388 | ||
389 | while (1) | |
390 | { | |
391 | /* getopt_long_only is like getopt_long, but '-' as well as '--' can | |
392 | indicate a long option. */ | |
393 | int longind; | |
394 | int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts, | |
395 | &longind); | |
396 | ||
397 | if (optc == -1) | |
398 | break; | |
399 | ||
400 | switch (optc) | |
401 | { | |
402 | default: | |
403 | /* md_parse_option should return 1 if it recognizes optc, | |
404 | 0 if not. */ | |
405 | if (md_parse_option (optc, optarg) != 0) | |
406 | break; | |
407 | /* `-v' isn't included in the general short_opts list, so check for | |
408 | it explicity here before deciding we've gotten a bad argument. */ | |
409 | if (optc == 'v') | |
410 | { | |
411 | #ifdef VMS | |
412 | /* Telling getopt to treat -v's value as optional can result | |
413 | in it picking up a following filename argument here. The | |
414 | VMS code in md_parse_option can return 0 in that case, | |
415 | but it has no way of pushing the filename argument back. */ | |
416 | if (optarg && *optarg) | |
417 | new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL; | |
418 | else | |
419 | #else | |
420 | case 'v': | |
421 | #endif | |
422 | case OPTION_VERBOSE: | |
423 | print_version_id (); | |
424 | break; | |
425 | } | |
426 | /*FALLTHRU*/ | |
427 | ||
428 | case '?': | |
429 | exit (EXIT_FAILURE); | |
430 | ||
431 | case 1: /* File name. */ | |
432 | if (!strcmp (optarg, "-")) | |
433 | optarg = ""; | |
434 | new_argv[new_argc++] = optarg; | |
435 | new_argv[new_argc] = NULL; | |
436 | break; | |
437 | ||
438 | case OPTION_HELP: | |
439 | show_usage (stdout); | |
440 | exit (EXIT_SUCCESS); | |
441 | ||
442 | case OPTION_NOCPP: | |
443 | break; | |
444 | ||
445 | case OPTION_STATISTICS: | |
446 | flag_print_statistics = 1; | |
447 | break; | |
448 | ||
449 | case OPTION_STRIP_LOCAL_ABSOLUTE: | |
450 | flag_strip_local_absolute = 1; | |
451 | break; | |
452 | ||
453 | case OPTION_TRADITIONAL_FORMAT: | |
454 | flag_traditional_format = 1; | |
455 | break; | |
456 | ||
457 | case OPTION_VERSION: | |
458 | /* This output is intended to follow the GNU standards document. */ | |
459 | printf (_("GNU assembler %s\n"), VERSION); | |
460 | printf (_("Copyright 1997 Free Software Foundation, Inc.\n")); | |
461 | printf (_("\ | |
462 | This program is free software; you may redistribute it under the terms of\n\ | |
463 | the GNU General Public License. This program has absolutely no warranty.\n")); | |
464 | printf (_("This assembler was configured for a target of `%s'.\n"), | |
465 | TARGET_ALIAS); | |
466 | exit (EXIT_SUCCESS); | |
467 | ||
468 | case OPTION_EMULATION: | |
469 | #ifdef USE_EMULATIONS | |
470 | if (strcmp (optarg, this_emulation->name)) | |
471 | as_fatal (_("multiple emulation names specified")); | |
472 | #else | |
473 | as_fatal (_("emulations not handled in this configuration")); | |
474 | #endif | |
475 | break; | |
476 | ||
477 | case OPTION_DUMPCONFIG: | |
478 | fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS); | |
479 | fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL); | |
480 | fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU); | |
481 | #ifdef TARGET_OBJ_FORMAT | |
482 | fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT); | |
483 | #endif | |
484 | #ifdef TARGET_FORMAT | |
485 | fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT); | |
486 | #endif | |
487 | exit (EXIT_SUCCESS); | |
488 | ||
489 | case OPTION_DEFSYM: | |
490 | { | |
491 | char *s; | |
492 | long i; | |
493 | struct defsym_list *n; | |
494 | ||
495 | for (s = optarg; *s != '\0' && *s != '='; s++) | |
496 | ; | |
497 | if (*s == '\0') | |
498 | as_fatal (_("bad defsym; format is --defsym name=value")); | |
499 | *s++ = '\0'; | |
500 | i = strtol (s, (char **) NULL, 0); | |
501 | n = (struct defsym_list *) xmalloc (sizeof *n); | |
502 | n->next = defsyms; | |
503 | n->name = optarg; | |
504 | n->value = i; | |
505 | defsyms = n; | |
506 | } | |
507 | break; | |
508 | ||
509 | case OPTION_INSTTBL: | |
510 | case 't': | |
511 | { | |
512 | /* optarg is the name of the file containing the instruction | |
513 | formats, opcodes, register names, etc. */ | |
514 | struct itbl_file_list *n; | |
515 | ||
516 | if (optarg == NULL) | |
517 | { | |
518 | as_warn ( _("No file name following -t option\n") ); | |
519 | break; | |
520 | } | |
521 | ||
522 | n = (struct itbl_file_list *) xmalloc (sizeof *n); | |
523 | n->next = itbl_files; | |
524 | n->name = optarg; | |
525 | itbl_files = n; | |
526 | ||
527 | /* Parse the file and add the new instructions to our internal | |
528 | table. If multiple instruction tables are specified, the | |
529 | information from this table gets appended onto the existing | |
530 | internal table. */ | |
531 | itbl_files->name = xstrdup (optarg); | |
532 | if (itbl_parse (itbl_files->name) != 0) | |
533 | { | |
534 | fprintf (stderr, _("Failed to read instruction table %s\n"), | |
535 | itbl_files->name); | |
536 | exit (EXIT_SUCCESS); | |
537 | } | |
538 | } | |
539 | break; | |
540 | ||
541 | case OPTION_DEPFILE: | |
542 | start_dependencies (optarg); | |
543 | break; | |
544 | ||
545 | case OPTION_GSTABS: | |
546 | debug_type = DEBUG_STABS; | |
547 | break; | |
548 | ||
549 | case 'J': | |
550 | flag_signed_overflow_ok = 1; | |
551 | break; | |
552 | ||
553 | #ifndef WORKING_DOT_WORD | |
554 | case 'K': | |
555 | flag_warn_displacement = 1; | |
556 | break; | |
557 | #endif | |
558 | ||
559 | case 'L': | |
560 | flag_keep_locals = 1; | |
561 | break; | |
562 | ||
563 | case OPTION_LISTING_LHS_WIDTH: | |
564 | listing_lhs_width = atoi(optarg); | |
565 | if (listing_lhs_width_second < listing_lhs_width) | |
566 | listing_lhs_width_second = listing_lhs_width; | |
567 | break; | |
568 | case OPTION_LISTING_LHS_WIDTH2: | |
569 | { | |
570 | int tmp = atoi(optarg); | |
571 | if (tmp > listing_lhs_width) | |
572 | listing_lhs_width_second = tmp; | |
573 | } | |
574 | break; | |
575 | case OPTION_LISTING_RHS_WIDTH: | |
576 | listing_rhs_width = atoi(optarg); | |
577 | break; | |
578 | case OPTION_LISTING_CONT_LINES: | |
579 | listing_lhs_cont_lines = atoi(optarg); | |
580 | break; | |
581 | ||
582 | case 'M': | |
583 | flag_mri = 1; | |
584 | #ifdef TC_M68K | |
585 | flag_m68k_mri = 1; | |
586 | #endif | |
587 | break; | |
588 | ||
589 | case 'R': | |
590 | flag_readonly_data_in_text = 1; | |
591 | break; | |
592 | ||
593 | case 'W': | |
594 | flag_no_warnings = 1; | |
595 | break; | |
596 | ||
597 | case 'Z': | |
598 | flag_always_generate_output = 1; | |
599 | break; | |
600 | ||
601 | case 'a': | |
602 | if (optarg) | |
603 | { | |
604 | while (*optarg) | |
605 | { | |
606 | switch (*optarg) | |
607 | { | |
608 | case 'c': | |
609 | listing |= LISTING_NOCOND; | |
610 | break; | |
611 | case 'd': | |
612 | listing |= LISTING_NODEBUG; | |
613 | break; | |
614 | case 'h': | |
615 | listing |= LISTING_HLL; | |
616 | break; | |
617 | case 'l': | |
618 | listing |= LISTING_LISTING; | |
619 | break; | |
620 | case 'm': | |
621 | listing |= LISTING_MACEXP; | |
622 | break; | |
623 | case 'n': | |
624 | listing |= LISTING_NOFORM; | |
625 | break; | |
626 | case 's': | |
627 | listing |= LISTING_SYMBOLS; | |
628 | break; | |
629 | case '=': | |
630 | listing_filename = xstrdup (optarg + 1); | |
631 | optarg += strlen (listing_filename); | |
632 | break; | |
633 | default: | |
634 | as_fatal (_("invalid listing option `%c'"), *optarg); | |
635 | break; | |
636 | } | |
637 | optarg++; | |
638 | } | |
639 | } | |
640 | if (!listing) | |
641 | listing = LISTING_DEFAULT; | |
642 | break; | |
643 | ||
644 | case 'D': | |
645 | /* DEBUG is implemented: it debugs different */ | |
646 | /* things from other people's assemblers. */ | |
647 | flag_debug = 1; | |
648 | break; | |
649 | ||
650 | case 'f': | |
651 | flag_no_comments = 1; | |
652 | break; | |
653 | ||
654 | case 'I': | |
655 | { /* Include file directory */ | |
656 | char *temp = xstrdup (optarg); | |
657 | add_include_dir (temp); | |
658 | break; | |
659 | } | |
660 | ||
661 | case 'o': | |
662 | out_file_name = xstrdup (optarg); | |
663 | break; | |
664 | ||
665 | case 'w': | |
666 | break; | |
667 | ||
668 | case 'X': | |
669 | /* -X means treat warnings as errors */ | |
670 | break; | |
671 | } | |
672 | } | |
673 | ||
674 | free (shortopts); | |
675 | free (longopts); | |
676 | ||
677 | *pargc = new_argc; | |
678 | *pargv = new_argv; | |
679 | } | |
680 | ||
681 | static long start_time; | |
682 | ||
683 | int | |
684 | main (argc, argv) | |
685 | int argc; | |
686 | char **argv; | |
687 | { | |
688 | int macro_alternate; | |
689 | int macro_strip_at; | |
690 | int keep_it; | |
691 | ||
692 | start_time = get_run_time (); | |
693 | ||
694 | #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) | |
695 | setlocale (LC_MESSAGES, ""); | |
696 | #endif | |
697 | bindtextdomain (PACKAGE, LOCALEDIR); | |
698 | textdomain (PACKAGE); | |
699 | ||
700 | if (debug_memory) | |
701 | { | |
702 | #ifdef BFD_ASSEMBLER | |
703 | extern long _bfd_chunksize; | |
704 | _bfd_chunksize = 64; | |
705 | #endif | |
706 | chunksize = 64; | |
707 | } | |
708 | ||
709 | #ifdef HOST_SPECIAL_INIT | |
710 | HOST_SPECIAL_INIT (argc, argv); | |
711 | #endif | |
712 | ||
713 | myname = argv[0]; | |
714 | xmalloc_set_program_name (myname); | |
715 | ||
716 | START_PROGRESS (myname, 0); | |
717 | ||
718 | #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME | |
719 | #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out" | |
720 | #endif | |
721 | ||
722 | out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME; | |
723 | ||
724 | hex_init (); | |
725 | #ifdef BFD_ASSEMBLER | |
726 | bfd_init (); | |
727 | bfd_set_error_program_name (myname); | |
728 | #endif | |
729 | ||
730 | #ifdef USE_EMULATIONS | |
731 | select_emulation_mode (argc, argv); | |
732 | #endif | |
733 | ||
734 | PROGRESS (1); | |
735 | symbol_begin (); | |
736 | frag_init (); | |
737 | subsegs_begin (); | |
738 | parse_args (&argc, &argv); | |
739 | read_begin (); | |
740 | input_scrub_begin (); | |
741 | expr_begin (); | |
742 | ||
743 | if (flag_print_statistics) | |
744 | xatexit (dump_statistics); | |
745 | ||
746 | macro_alternate = 0; | |
747 | macro_strip_at = 0; | |
748 | #ifdef TC_I960 | |
749 | macro_strip_at = flag_mri; | |
750 | #endif | |
751 | #ifdef TC_A29K | |
752 | /* For compatibility with the AMD 29K family macro assembler | |
753 | specification. */ | |
754 | macro_alternate = 1; | |
755 | macro_strip_at = 1; | |
756 | #endif | |
757 | ||
758 | macro_init (macro_alternate, flag_mri, macro_strip_at, macro_expr); | |
759 | ||
760 | PROGRESS (1); | |
761 | ||
762 | #ifdef BFD_ASSEMBLER | |
763 | output_file_create (out_file_name); | |
764 | assert (stdoutput != 0); | |
765 | #endif | |
766 | ||
767 | #ifdef tc_init_after_args | |
768 | tc_init_after_args (); | |
769 | #endif | |
770 | ||
771 | itbl_init (); | |
772 | ||
773 | /* Now that we have fully initialized, and have created the output | |
774 | file, define any symbols requested by --defsym command line | |
775 | arguments. */ | |
776 | while (defsyms != NULL) | |
777 | { | |
778 | symbolS *sym; | |
779 | struct defsym_list *next; | |
780 | ||
781 | sym = symbol_new (defsyms->name, absolute_section, defsyms->value, | |
782 | &zero_address_frag); | |
783 | symbol_table_insert (sym); | |
784 | next = defsyms->next; | |
785 | free (defsyms); | |
786 | defsyms = next; | |
787 | } | |
788 | ||
789 | PROGRESS (1); | |
790 | ||
791 | perform_an_assembly_pass (argc, argv); /* Assemble it. */ | |
792 | ||
793 | cond_finish_check (-1); | |
794 | ||
795 | #ifdef md_end | |
796 | md_end (); | |
797 | #endif | |
798 | ||
799 | if (seen_at_least_1_file () | |
800 | && (flag_always_generate_output || had_errors () == 0)) | |
801 | keep_it = 1; | |
802 | else | |
803 | keep_it = 0; | |
804 | ||
805 | #if defined (BFD_ASSEMBLER) || !defined (BFD) | |
806 | /* This used to be done at the start of write_object_file in | |
807 | write.c, but that caused problems when doing listings when | |
808 | keep_it was zero. This could probably be moved above md_end, but | |
809 | I didn't want to risk the change. */ | |
810 | subsegs_finish (); | |
811 | #endif | |
812 | ||
813 | if (keep_it) | |
814 | write_object_file (); | |
815 | ||
816 | #ifndef NO_LISTING | |
817 | listing_print (listing_filename); | |
818 | #endif | |
819 | ||
820 | #ifndef OBJ_VMS /* does its own file handling */ | |
821 | #ifndef BFD_ASSEMBLER | |
822 | if (keep_it) | |
823 | #endif | |
824 | output_file_close (out_file_name); | |
825 | #endif | |
826 | ||
827 | if (had_errors () > 0 && ! flag_always_generate_output) | |
828 | keep_it = 0; | |
829 | ||
830 | if (!keep_it) | |
831 | unlink (out_file_name); | |
832 | ||
833 | input_scrub_end (); | |
834 | ||
835 | END_PROGRESS (myname); | |
836 | ||
837 | /* Use xexit instead of return, because under VMS environments they | |
838 | may not place the same interpretation on the value given. */ | |
839 | if (had_errors () > 0) | |
840 | xexit (EXIT_FAILURE); | |
841 | ||
842 | /* Only generate dependency file if assembler was successful. */ | |
843 | print_dependencies (); | |
844 | ||
845 | xexit (EXIT_SUCCESS); | |
846 | } | |
847 | ||
848 | static void | |
849 | dump_statistics () | |
850 | { | |
851 | #ifdef HAVE_SBRK | |
852 | char *lim = (char *) sbrk (0); | |
853 | #endif | |
854 | long run_time = get_run_time () - start_time; | |
855 | ||
856 | fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"), | |
857 | myname, run_time / 1000000, run_time % 1000000); | |
858 | #ifdef HAVE_SBRK | |
859 | fprintf (stderr, _("%s: data size %ld\n"), | |
860 | myname, (long) (lim - (char *) &environ)); | |
861 | #endif | |
862 | ||
863 | subsegs_print_statistics (stderr); | |
864 | write_print_statistics (stderr); | |
865 | symbol_print_statistics (stderr); | |
866 | read_print_statistics (stderr); | |
867 | ||
868 | #ifdef tc_print_statistics | |
869 | tc_print_statistics (stderr); | |
870 | #endif | |
871 | #ifdef obj_print_statistics | |
872 | obj_print_statistics (stderr); | |
873 | #endif | |
874 | } | |
875 | \f | |
876 | ||
877 | /* perform_an_assembly_pass() | |
878 | * | |
879 | * Here to attempt 1 pass over each input file. | |
880 | * We scan argv[*] looking for filenames or exactly "" which is | |
881 | * shorthand for stdin. Any argv that is NULL is not a file-name. | |
882 | * We set need_pass_2 TRUE if, after this, we still have unresolved | |
883 | * expressions of the form (unknown value)+-(unknown value). | |
884 | * | |
885 | * Note the un*x semantics: there is only 1 logical input file, but it | |
886 | * may be a catenation of many 'physical' input files. | |
887 | */ | |
888 | static void | |
889 | perform_an_assembly_pass (argc, argv) | |
890 | int argc; | |
891 | char **argv; | |
892 | { | |
893 | int saw_a_file = 0; | |
894 | #ifdef BFD_ASSEMBLER | |
895 | flagword applicable; | |
896 | #endif | |
897 | ||
898 | need_pass_2 = 0; | |
899 | ||
900 | #ifndef BFD_ASSEMBLER | |
901 | #ifdef MANY_SEGMENTS | |
902 | { | |
903 | unsigned int i; | |
904 | for (i = SEG_E0; i < SEG_UNKNOWN; i++) | |
905 | segment_info[i].fix_root = 0; | |
906 | } | |
907 | /* Create the three fixed ones */ | |
908 | { | |
909 | segT seg; | |
910 | ||
911 | #ifdef TE_APOLLO | |
912 | seg = subseg_new (".wtext", 0); | |
913 | #else | |
914 | seg = subseg_new (".text", 0); | |
915 | #endif | |
916 | assert (seg == SEG_E0); | |
917 | seg = subseg_new (".data", 0); | |
918 | assert (seg == SEG_E1); | |
919 | seg = subseg_new (".bss", 0); | |
920 | assert (seg == SEG_E2); | |
921 | #ifdef TE_APOLLO | |
922 | create_target_segments (); | |
923 | #endif | |
924 | } | |
925 | ||
926 | #else /* not MANY_SEGMENTS */ | |
927 | text_fix_root = NULL; | |
928 | data_fix_root = NULL; | |
929 | bss_fix_root = NULL; | |
930 | #endif /* not MANY_SEGMENTS */ | |
931 | #else /* BFD_ASSEMBLER */ | |
932 | /* Create the standard sections, and those the assembler uses | |
933 | internally. */ | |
934 | text_section = subseg_new (TEXT_SECTION_NAME, 0); | |
935 | data_section = subseg_new (DATA_SECTION_NAME, 0); | |
936 | bss_section = subseg_new (BSS_SECTION_NAME, 0); | |
937 | /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed | |
938 | to have relocs, otherwise we don't find out in time. */ | |
939 | applicable = bfd_applicable_section_flags (stdoutput); | |
940 | bfd_set_section_flags (stdoutput, text_section, | |
941 | applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC | |
942 | | SEC_CODE | SEC_READONLY)); | |
943 | /* @@ FIXME -- SEC_CODE seems to mean code only, rather than code possibly.*/ | |
944 | bfd_set_section_flags (stdoutput, data_section, | |
945 | applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)); | |
946 | bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC); | |
947 | seg_info (bss_section)->bss = 1; | |
948 | subseg_new (BFD_ABS_SECTION_NAME, 0); | |
949 | subseg_new (BFD_UND_SECTION_NAME, 0); | |
950 | reg_section = subseg_new ("*GAS `reg' section*", 0); | |
951 | expr_section = subseg_new ("*GAS `expr' section*", 0); | |
952 | ||
953 | #endif /* BFD_ASSEMBLER */ | |
954 | ||
955 | subseg_set (text_section, 0); | |
956 | ||
957 | /* This may add symbol table entries, which requires having an open BFD, | |
958 | and sections already created, in BFD_ASSEMBLER mode. */ | |
959 | md_begin (); | |
960 | ||
961 | #ifdef obj_begin | |
962 | obj_begin (); | |
963 | #endif | |
964 | ||
965 | argv++; /* skip argv[0] */ | |
966 | argc--; /* skip argv[0] */ | |
967 | while (argc--) | |
968 | { | |
969 | if (*argv) | |
970 | { /* Is it a file-name argument? */ | |
971 | PROGRESS (1); | |
972 | saw_a_file++; | |
973 | /* argv->"" if stdin desired, else->filename */ | |
974 | read_a_source_file (*argv); | |
975 | } | |
976 | argv++; /* completed that argv */ | |
977 | } | |
978 | if (!saw_a_file) | |
979 | read_a_source_file (""); | |
980 | } /* perform_an_assembly_pass() */ | |
981 | ||
982 | /* The interface between the macro code and gas expression handling. */ | |
983 | ||
984 | static int | |
985 | macro_expr (emsg, idx, in, val) | |
986 | const char *emsg; | |
987 | int idx; | |
988 | sb *in; | |
989 | int *val; | |
990 | { | |
991 | char *hold; | |
992 | expressionS ex; | |
993 | ||
994 | sb_terminate (in); | |
995 | ||
996 | hold = input_line_pointer; | |
997 | input_line_pointer = in->ptr + idx; | |
998 | expression (&ex); | |
999 | idx = input_line_pointer - in->ptr; | |
1000 | input_line_pointer = hold; | |
1001 | ||
1002 | if (ex.X_op != O_constant) | |
1003 | as_bad ("%s", emsg); | |
1004 | ||
1005 | *val = (int) ex.X_add_number; | |
1006 | ||
1007 | return idx; | |
1008 | } | |
1009 | ||
1010 | /* end of as.c */ |