1 /* as.c - GAS main program.
2 Copyright (C) 1987-2022 Free Software Foundation, Inc.
3
4 This file is part of GAS, the GNU Assembler.
5
6 GAS is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
9 any later version.
10
11 GAS is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
14 License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GAS; see the file COPYING. If not, write to the Free
18 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
19 02110-1301, USA. */
20
21 /* Main program for AS; a 32-bit assembler of GNU.
22 Understands command arguments.
23 Has a few routines that don't fit in other modules because they
24 are shared.
25
26 bugs
27
28 : initialisers
29 Since no-one else says they will support them in future: I
30 don't support them now. */
31
32 #define COMMON
33
34 /* Disable code to set FAKE_LABEL_NAME in obj-multi.h, to avoid circular
35 reference. */
36 #define INITIALIZING_EMULS
37
38 #include "as.h"
39 #include "subsegs.h"
40 #include "output-file.h"
41 #include "sb.h"
42 #include "macro.h"
43 #include "dwarf2dbg.h"
44 #include "dw2gencfi.h"
45 #include "bfdver.h"
46 #include "write.h"
47
48 #ifdef HAVE_ITBL_CPU
49 #include "itbl-ops.h"
50 #else
51 #define itbl_init()
52 #endif
53
54 #ifdef USING_CGEN
55 /* Perform any cgen specific initialisation for gas. */
56 extern void gas_cgen_begin (void);
57 #endif
58
59 /* We build a list of defsyms as we read the options, and then define
60 them after we have initialized everything. */
61 struct defsym_list
62 {
63 struct defsym_list *next;
64 char *name;
65 valueT value;
66 };
67
68
69 /* True if a listing is wanted. */
70 int listing;
71
72 /* Type of debugging to generate. */
73 enum debug_info_type debug_type = DEBUG_UNSPECIFIED;
74 int use_gnu_debug_info_extensions = 0;
75
76 #ifndef MD_DEBUG_FORMAT_SELECTOR
77 #define MD_DEBUG_FORMAT_SELECTOR NULL
78 #endif
79 static enum debug_info_type (*md_debug_format_selector) (int *) = MD_DEBUG_FORMAT_SELECTOR;
80
81 /* Maximum level of macro nesting. */
82 int max_macro_nest = 100;
83
84 /* argv[0] */
85 static char * myname;
86
87 /* The default obstack chunk size. If we set this to zero, the
88 obstack code will use whatever will fit in a 4096 byte block. */
89 int chunksize = 0;
90
91 /* To monitor memory allocation more effectively, make this non-zero.
92 Then the chunk sizes for gas and bfd will be reduced. */
93 int debug_memory = 0;
94
95 /* Enable verbose mode. */
96 int verbose = 0;
97
98 /* Which version of DWARF CIE to produce. This default value of -1
99 indicates that this value has not been set yet, a default value is
100 provided in dwarf2_init. A different value can also be supplied by the
101 command line flag --gdwarf-cie-version, or by a target in
102 MD_AFTER_PARSE_ARGS. */
103 int flag_dwarf_cie_version = -1;
104
105 /* The maximum level of DWARF DEBUG information we should manufacture.
106 This defaults to 3 unless overridden by a command line option. */
107 unsigned int dwarf_level = 3;
108
109 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
110 int flag_use_elf_stt_common = DEFAULT_GENERATE_ELF_STT_COMMON;
111 bool flag_generate_build_notes = DEFAULT_GENERATE_BUILD_NOTES;
112 #endif
113
114 /* Keep the output file. */
115 static int keep_it = 0;
116
117 segT reg_section;
118 segT expr_section;
119 segT text_section;
120 segT data_section;
121 segT bss_section;
122
123 /* Name of listing file. */
124 static char *listing_filename = NULL;
125
126 static struct defsym_list *defsyms;
127
128 #ifdef HAVE_ITBL_CPU
129 /* Keep a record of the itbl files we read in. */
130 struct itbl_file_list
131 {
132 struct itbl_file_list *next;
133 char *name;
134 };
135 static struct itbl_file_list *itbl_files;
136 #endif
137
138 static long start_time;
139
140 static int flag_macro_alternate;
141
142
143 #ifdef USE_EMULATIONS
144 #define EMULATION_ENVIRON "AS_EMULATION"
145
146 extern struct emulation mipsbelf, mipslelf, mipself;
147 extern struct emulation i386coff, i386elf, i386aout;
148 extern struct emulation crisaout, criself;
149
150 static struct emulation *const emulations[] = { EMULATIONS };
151 static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]);
152
153 static void
select_emulation_mode(int argc,char ** argv)154 select_emulation_mode (int argc, char **argv)
155 {
156 int i;
157 char *p;
158 const char *em = NULL;
159
160 for (i = 1; i < argc; i++)
161 if (startswith (argv[i], "--em"))
162 break;
163
164 if (i == argc)
165 goto do_default;
166
167 p = strchr (argv[i], '=');
168 if (p)
169 p++;
170 else
171 p = argv[i + 1];
172
173 if (!p || !*p)
174 as_fatal (_("missing emulation mode name"));
175 em = p;
176
177 do_default:
178 if (em == 0)
179 em = getenv (EMULATION_ENVIRON);
180 if (em == 0)
181 em = DEFAULT_EMULATION;
182
183 if (em)
184 {
185 for (i = 0; i < n_emulations; i++)
186 if (!strcmp (emulations[i]->name, em))
187 break;
188 if (i == n_emulations)
189 as_fatal (_("unrecognized emulation name `%s'"), em);
190 this_emulation = emulations[i];
191 }
192 else
193 this_emulation = emulations[0];
194
195 this_emulation->init ();
196 }
197
198 const char *
default_emul_bfd_name(void)199 default_emul_bfd_name (void)
200 {
201 abort ();
202 return NULL;
203 }
204
205 void
common_emul_init(void)206 common_emul_init (void)
207 {
208 this_format = this_emulation->format;
209
210 if (this_emulation->leading_underscore == 2)
211 this_emulation->leading_underscore = this_format->dfl_leading_underscore;
212
213 if (this_emulation->default_endian != 2)
214 target_big_endian = this_emulation->default_endian;
215
216 if (this_emulation->fake_label_name == 0)
217 {
218 if (this_emulation->leading_underscore)
219 this_emulation->fake_label_name = FAKE_LABEL_NAME;
220 else
221 /* What other parameters should we test? */
222 this_emulation->fake_label_name = "." FAKE_LABEL_NAME;
223 }
224 }
225 #endif
226
227 void
print_version_id(void)228 print_version_id (void)
229 {
230 static int printed;
231
232 if (printed)
233 return;
234 printed = 1;
235
236 fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s\n"),
237 VERSION, TARGET_ALIAS, BFD_VERSION_STRING);
238 }
239
240 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
241 enum compressed_debug_section_type flag_compress_debug
242 = COMPRESS_DEBUG_GABI_ZLIB;
243 #endif
244
245 static void
show_usage(FILE * stream)246 show_usage (FILE * stream)
247 {
248 fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname);
249
250 fprintf (stream, _("\
251 Options:\n\
252 -a[sub-option...] turn on listings\n\
253 Sub-options [default hls]:\n\
254 c omit false conditionals\n\
255 d omit debugging directives\n\
256 g include general info\n\
257 h include high-level source\n\
258 l include assembly\n\
259 m include macro expansions\n\
260 n omit forms processing\n\
261 s include symbols\n\
262 =FILE list to FILE (must be last sub-option)\n"));
263
264 fprintf (stream, _("\
265 --alternate initially turn on alternate macro syntax\n"));
266 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG
267 fprintf (stream, _("\
268 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
269 compress DWARF debug sections using zlib [default]\n"));
270 fprintf (stream, _("\
271 --nocompress-debug-sections\n\
272 don't compress DWARF debug sections\n"));
273 #else
274 fprintf (stream, _("\
275 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
276 compress DWARF debug sections using zlib\n"));
277 fprintf (stream, _("\
278 --nocompress-debug-sections\n\
279 don't compress DWARF debug sections [default]\n"));
280 #endif
281 fprintf (stream, _("\
282 -D produce assembler debugging messages\n"));
283 fprintf (stream, _("\
284 --debug-prefix-map OLD=NEW\n\
285 map OLD to NEW in debug information\n"));
286 fprintf (stream, _("\
287 --defsym SYM=VAL define symbol SYM to given value\n"));
288 #ifdef USE_EMULATIONS
289 {
290 int i;
291 const char *def_em;
292
293 fprintf (stream, "\
294 --em=[");
295 for (i = 0; i < n_emulations - 1; i++)
296 fprintf (stream, "%s | ", emulations[i]->name);
297 fprintf (stream, "%s]\n", emulations[i]->name);
298
299 def_em = getenv (EMULATION_ENVIRON);
300 if (!def_em)
301 def_em = DEFAULT_EMULATION;
302 fprintf (stream, _("\
303 emulate output (default %s)\n"), def_em);
304 }
305 #endif
306 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
307 fprintf (stream, _("\
308 --execstack require executable stack for this object\n"));
309 fprintf (stream, _("\
310 --noexecstack don't require executable stack for this object\n"));
311 fprintf (stream, _("\
312 --size-check=[error|warning]\n\
313 ELF .size directive check (default --size-check=error)\n"));
314 fprintf (stream, _("\
315 --elf-stt-common=[no|yes] "));
316 if (DEFAULT_GENERATE_ELF_STT_COMMON)
317 fprintf (stream, _("(default: yes)\n"));
318 else
319 fprintf (stream, _("(default: no)\n"));
320 fprintf (stream, _("\
321 generate ELF common symbols with STT_COMMON type\n"));
322 fprintf (stream, _("\
323 --sectname-subst enable section name substitution sequences\n"));
324
325 fprintf (stream, _("\
326 --generate-missing-build-notes=[no|yes] "));
327 #if DEFAULT_GENERATE_BUILD_NOTES
328 fprintf (stream, _("(default: yes)\n"));
329 #else
330 fprintf (stream, _("(default: no)\n"));
331 #endif
332 fprintf (stream, _("\
333 generate GNU Build notes if none are present in the input\n"));
334 #endif /* OBJ_ELF */
335
336 fprintf (stream, _("\
337 -f skip whitespace and comment preprocessing\n"));
338 fprintf (stream, _("\
339 -g --gen-debug generate debugging information\n"));
340 fprintf (stream, _("\
341 --gstabs generate STABS debugging information\n"));
342 fprintf (stream, _("\
343 --gstabs+ generate STABS debug info with GNU extensions\n"));
344 fprintf (stream, _("\
345 --gdwarf-<N> generate DWARF<N> debugging information. 2 <= <N> <= 5\n"));
346 fprintf (stream, _("\
347 --gdwarf-sections generate per-function section names for DWARF line information\n"));
348 fprintf (stream, _("\
349 --target-help show target specific options\n"));
350 fprintf (stream, _("\
351 -I DIR add DIR to search list for .include directives\n"));
352 fprintf (stream, _("\
353 -J don't warn about signed overflow\n"));
354 fprintf (stream, _("\
355 -K warn when differences altered for long displacements\n"));
356 fprintf (stream, _("\
357 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
358 fprintf (stream, _("\
359 -M,--mri assemble in MRI compatibility mode\n"));
360 fprintf (stream, _("\
361 --MD FILE write dependency information in FILE (default none)\n"));
362 fprintf (stream, _("\
363 -nocpp ignored\n"));
364 fprintf (stream, _("\
365 -no-pad-sections do not pad the end of sections to alignment boundaries\n"));
366 fprintf (stream, _("\
367 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
368 fprintf (stream, _("\
369 -R fold data section into text section\n"));
370 fprintf (stream, _("\
371 --statistics print various measured statistics from execution\n"));
372 fprintf (stream, _("\
373 --strip-local-absolute strip local absolute symbols\n"));
374 fprintf (stream, _("\
375 --traditional-format Use same format as native assembler when possible\n"));
376 fprintf (stream, _("\
377 --version print assembler version number and exit\n"));
378 fprintf (stream, _("\
379 -W --no-warn suppress warnings\n"));
380 fprintf (stream, _("\
381 --warn don't suppress warnings\n"));
382 fprintf (stream, _("\
383 --fatal-warnings treat warnings as errors\n"));
384 #ifdef HAVE_ITBL_CPU
385 fprintf (stream, _("\
386 --itbl INSTTBL extend instruction set to include instructions\n\
387 matching the specifications defined in file INSTTBL\n"));
388 #endif
389 fprintf (stream, _("\
390 -w ignored\n"));
391 fprintf (stream, _("\
392 -X ignored\n"));
393 fprintf (stream, _("\
394 -Z generate object file even after errors\n"));
395 fprintf (stream, _("\
396 --listing-lhs-width set the width in words of the output data column of\n\
397 the listing\n"));
398 fprintf (stream, _("\
399 --listing-lhs-width2 set the width in words of the continuation lines\n\
400 of the output data column; ignored if smaller than\n\
401 the width of the first line\n"));
402 fprintf (stream, _("\
403 --listing-rhs-width set the max width in characters of the lines from\n\
404 the source file\n"));
405 fprintf (stream, _("\
406 --listing-cont-lines set the maximum number of continuation lines used\n\
407 for the output data column of the listing\n"));
408 fprintf (stream, _("\
409 @FILE read options from FILE\n"));
410
411 md_show_usage (stream);
412
413 fputc ('\n', stream);
414
415 if (REPORT_BUGS_TO[0] && stream == stdout)
416 fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
417 }
418
419 /* Since it is easy to do here we interpret the special arg "-"
420 to mean "use stdin" and we set that argv[] pointing to "".
421 After we have munged argv[], the only things left are source file
422 name(s) and ""(s) denoting stdin. These file names are used
423 (perhaps more than once) later.
424
425 check for new machine-dep cmdline options in
426 md_parse_option definitions in config/tc-*.c. */
427
428 static void
parse_args(int * pargc,char *** pargv)429 parse_args (int * pargc, char *** pargv)
430 {
431 int old_argc;
432 int new_argc;
433 char ** old_argv;
434 char ** new_argv;
435 /* Starting the short option string with '-' is for programs that
436 expect options and other ARGV-elements in any order and that care about
437 the ordering of the two. We describe each non-option ARGV-element
438 as if it were the argument of an option with character code 1. */
439 char *shortopts;
440 extern const char *md_shortopts;
441 static const char std_shortopts[] =
442 {
443 '-', 'J',
444 #ifndef WORKING_DOT_WORD
445 /* -K is not meaningful if .word is not being hacked. */
446 'K',
447 #endif
448 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
449 #ifndef VMS
450 /* -v takes an argument on VMS, so we don't make it a generic
451 option. */
452 'v',
453 #endif
454 'w', 'X',
455 #ifdef HAVE_ITBL_CPU
456 /* New option for extending instruction set (see also --itbl below). */
457 't', ':',
458 #endif
459 '\0'
460 };
461 struct option *longopts;
462 extern struct option md_longopts[];
463 extern size_t md_longopts_size;
464 /* Codes used for the long options with no short synonyms. */
465 enum option_values
466 {
467 OPTION_HELP = OPTION_STD_BASE,
468 OPTION_NOCPP,
469 OPTION_STATISTICS,
470 OPTION_VERSION,
471 OPTION_DUMPCONFIG,
472 OPTION_VERBOSE,
473 OPTION_EMULATION,
474 OPTION_DEBUG_PREFIX_MAP,
475 OPTION_DEFSYM,
476 OPTION_LISTING_LHS_WIDTH,
477 OPTION_LISTING_LHS_WIDTH2, /* = STD_BASE + 10 */
478 OPTION_LISTING_RHS_WIDTH,
479 OPTION_LISTING_CONT_LINES,
480 OPTION_DEPFILE,
481 OPTION_GSTABS,
482 OPTION_GSTABS_PLUS,
483 OPTION_GDWARF_2,
484 OPTION_GDWARF_3,
485 OPTION_GDWARF_4,
486 OPTION_GDWARF_5,
487 OPTION_GDWARF_SECTIONS, /* = STD_BASE + 20 */
488 OPTION_GDWARF_CIE_VERSION,
489 OPTION_STRIP_LOCAL_ABSOLUTE,
490 OPTION_TRADITIONAL_FORMAT,
491 OPTION_WARN,
492 OPTION_TARGET_HELP,
493 OPTION_EXECSTACK,
494 OPTION_NOEXECSTACK,
495 OPTION_SIZE_CHECK,
496 OPTION_ELF_STT_COMMON,
497 OPTION_ELF_BUILD_NOTES, /* = STD_BASE + 30 */
498 OPTION_SECTNAME_SUBST,
499 OPTION_ALTERNATE,
500 OPTION_AL,
501 OPTION_HASH_TABLE_SIZE,
502 OPTION_REDUCE_MEMORY_OVERHEADS,
503 OPTION_WARN_FATAL,
504 OPTION_COMPRESS_DEBUG,
505 OPTION_NOCOMPRESS_DEBUG,
506 OPTION_NO_PAD_SECTIONS,
507 OPTION_MULTIBYTE_HANDLING /* = STD_BASE + 40 */
508 /* When you add options here, check that they do
509 not collide with OPTION_MD_BASE. See as.h. */
510 };
511
512 static const struct option std_longopts[] =
513 {
514 /* Note: commas are placed at the start of the line rather than
515 the end of the preceding line so that it is simpler to
516 selectively add and remove lines from this list. */
517 {"alternate", no_argument, NULL, OPTION_ALTERNATE}
518 /* The entry for "a" is here to prevent getopt_long_only() from
519 considering that -a is an abbreviation for --alternate. This is
520 necessary because -a=<FILE> is a valid switch but getopt would
521 normally reject it since --alternate does not take an argument. */
522 ,{"a", optional_argument, NULL, 'a'}
523 /* Handle -al=<FILE>. */
524 ,{"al", optional_argument, NULL, OPTION_AL}
525 ,{"compress-debug-sections", optional_argument, NULL, OPTION_COMPRESS_DEBUG}
526 ,{"nocompress-debug-sections", no_argument, NULL, OPTION_NOCOMPRESS_DEBUG}
527 ,{"debug-prefix-map", required_argument, NULL, OPTION_DEBUG_PREFIX_MAP}
528 ,{"defsym", required_argument, NULL, OPTION_DEFSYM}
529 ,{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG}
530 ,{"emulation", required_argument, NULL, OPTION_EMULATION}
531 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
532 ,{"execstack", no_argument, NULL, OPTION_EXECSTACK}
533 ,{"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK}
534 ,{"size-check", required_argument, NULL, OPTION_SIZE_CHECK}
535 ,{"elf-stt-common", required_argument, NULL, OPTION_ELF_STT_COMMON}
536 ,{"sectname-subst", no_argument, NULL, OPTION_SECTNAME_SUBST}
537 ,{"generate-missing-build-notes", required_argument, NULL, OPTION_ELF_BUILD_NOTES}
538 #endif
539 ,{"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL}
540 ,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF_2}
541 ,{"gdwarf-3", no_argument, NULL, OPTION_GDWARF_3}
542 ,{"gdwarf-4", no_argument, NULL, OPTION_GDWARF_4}
543 ,{"gdwarf-5", no_argument, NULL, OPTION_GDWARF_5}
544 /* GCC uses --gdwarf-2 but GAS used to to use --gdwarf2,
545 so we keep it here for backwards compatibility. */
546 ,{"gdwarf2", no_argument, NULL, OPTION_GDWARF_2}
547 ,{"gdwarf-sections", no_argument, NULL, OPTION_GDWARF_SECTIONS}
548 ,{"gdwarf-cie-version", required_argument, NULL, OPTION_GDWARF_CIE_VERSION}
549 ,{"gen-debug", no_argument, NULL, 'g'}
550 ,{"gstabs", no_argument, NULL, OPTION_GSTABS}
551 ,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS}
552 ,{"hash-size", required_argument, NULL, OPTION_HASH_TABLE_SIZE}
553 ,{"help", no_argument, NULL, OPTION_HELP}
554 #ifdef HAVE_ITBL_CPU
555 /* New option for extending instruction set (see also -t above).
556 The "-t file" or "--itbl file" option extends the basic set of
557 valid instructions by reading "file", a text file containing a
558 list of instruction formats. The additional opcodes and their
559 formats are added to the built-in set of instructions, and
560 mnemonics for new registers may also be defined. */
561 ,{"itbl", required_argument, NULL, 't'}
562 #endif
563 /* getopt allows abbreviations, so we do this to stop it from
564 treating -k as an abbreviation for --keep-locals. Some
565 ports use -k to enable PIC assembly. */
566 ,{"keep-locals", no_argument, NULL, 'L'}
567 ,{"keep-locals", no_argument, NULL, 'L'}
568 ,{"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH}
569 ,{"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2}
570 ,{"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH}
571 ,{"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES}
572 ,{"MD", required_argument, NULL, OPTION_DEPFILE}
573 ,{"mri", no_argument, NULL, 'M'}
574 ,{"nocpp", no_argument, NULL, OPTION_NOCPP}
575 ,{"no-pad-sections", no_argument, NULL, OPTION_NO_PAD_SECTIONS}
576 ,{"no-warn", no_argument, NULL, 'W'}
577 ,{"reduce-memory-overheads", no_argument, NULL, OPTION_REDUCE_MEMORY_OVERHEADS}
578 ,{"statistics", no_argument, NULL, OPTION_STATISTICS}
579 ,{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE}
580 ,{"version", no_argument, NULL, OPTION_VERSION}
581 ,{"verbose", no_argument, NULL, OPTION_VERBOSE}
582 ,{"target-help", no_argument, NULL, OPTION_TARGET_HELP}
583 ,{"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT}
584 ,{"warn", no_argument, NULL, OPTION_WARN}
585 ,{"multibyte-handling", required_argument, NULL, OPTION_MULTIBYTE_HANDLING}
586 };
587
588 /* Construct the option lists from the standard list and the target
589 dependent list. Include space for an extra NULL option and
590 always NULL terminate. */
591 shortopts = concat (std_shortopts, md_shortopts, (char *) NULL);
592 longopts = (struct option *) xmalloc (sizeof (std_longopts)
593 + md_longopts_size + sizeof (struct option));
594 memcpy (longopts, std_longopts, sizeof (std_longopts));
595 memcpy (((char *) longopts) + sizeof (std_longopts), md_longopts, md_longopts_size);
596 memset (((char *) longopts) + sizeof (std_longopts) + md_longopts_size,
597 0, sizeof (struct option));
598
599 /* Make a local copy of the old argv. */
600 old_argc = *pargc;
601 old_argv = *pargv;
602
603 /* Initialize a new argv that contains no options. */
604 new_argv = XNEWVEC (char *, old_argc + 1);
605 new_argv[0] = old_argv[0];
606 new_argc = 1;
607 new_argv[new_argc] = NULL;
608
609 while (1)
610 {
611 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
612 indicate a long option. */
613 int longind;
614 int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts,
615 &longind);
616
617 if (optc == -1)
618 break;
619
620 switch (optc)
621 {
622 default:
623 /* md_parse_option should return 1 if it recognizes optc,
624 0 if not. */
625 if (md_parse_option (optc, optarg) != 0)
626 break;
627 /* `-v' isn't included in the general short_opts list, so check for
628 it explicitly here before deciding we've gotten a bad argument. */
629 if (optc == 'v')
630 {
631 #ifdef VMS
632 /* Telling getopt to treat -v's value as optional can result
633 in it picking up a following filename argument here. The
634 VMS code in md_parse_option can return 0 in that case,
635 but it has no way of pushing the filename argument back. */
636 if (optarg && *optarg)
637 new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL;
638 else
639 #else
640 case 'v':
641 #endif
642 case OPTION_VERBOSE:
643 print_version_id ();
644 verbose = 1;
645 break;
646 }
647 else
648 as_bad (_("unrecognized option -%c%s"), optc, optarg ? optarg : "");
649 /* Fall through. */
650
651 case '?':
652 exit (EXIT_FAILURE);
653
654 case 1: /* File name. */
655 if (!strcmp (optarg, "-"))
656 optarg = (char *) "";
657 new_argv[new_argc++] = optarg;
658 new_argv[new_argc] = NULL;
659 break;
660
661 case OPTION_TARGET_HELP:
662 md_show_usage (stdout);
663 exit (EXIT_SUCCESS);
664
665 case OPTION_HELP:
666 show_usage (stdout);
667 exit (EXIT_SUCCESS);
668
669 case OPTION_NOCPP:
670 break;
671
672 case OPTION_NO_PAD_SECTIONS:
673 do_not_pad_sections_to_alignment = 1;
674 break;
675
676 case OPTION_STATISTICS:
677 flag_print_statistics = 1;
678 break;
679
680 case OPTION_STRIP_LOCAL_ABSOLUTE:
681 flag_strip_local_absolute = 1;
682 break;
683
684 case OPTION_TRADITIONAL_FORMAT:
685 flag_traditional_format = 1;
686 break;
687
688 case OPTION_MULTIBYTE_HANDLING:
689 if (strcmp (optarg, "allow") == 0)
690 multibyte_handling = multibyte_allow;
691 else if (strcmp (optarg, "warn") == 0)
692 multibyte_handling = multibyte_warn;
693 else if (strcmp (optarg, "warn-sym-only") == 0)
694 multibyte_handling = multibyte_warn_syms;
695 else if (strcmp (optarg, "warn_sym_only") == 0)
696 multibyte_handling = multibyte_warn_syms;
697 else
698 as_fatal (_("unexpected argument to --multibyte-input-option: '%s'"), optarg);
699 break;
700
701 case OPTION_VERSION:
702 /* This output is intended to follow the GNU standards document. */
703 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING);
704 printf (_("Copyright (C) 2022 Free Software Foundation, Inc.\n"));
705 printf (_("\
706 This program is free software; you may redistribute it under the terms of\n\
707 the GNU General Public License version 3 or later.\n\
708 This program has absolutely no warranty.\n"));
709 #ifdef TARGET_WITH_CPU
710 printf (_("This assembler was configured for a target of `%s' "
711 "and default,\ncpu type `%s'.\n"),
712 TARGET_ALIAS, TARGET_WITH_CPU);
713 #else
714 printf (_("This assembler was configured for a target of `%s'.\n"),
715 TARGET_ALIAS);
716 #endif
717 exit (EXIT_SUCCESS);
718
719 case OPTION_EMULATION:
720 #ifdef USE_EMULATIONS
721 if (strcmp (optarg, this_emulation->name))
722 as_fatal (_("multiple emulation names specified"));
723 #else
724 as_fatal (_("emulations not handled in this configuration"));
725 #endif
726 break;
727
728 case OPTION_DUMPCONFIG:
729 fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS);
730 fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL);
731 fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU);
732 #ifdef TARGET_OBJ_FORMAT
733 fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT);
734 #endif
735 #ifdef TARGET_FORMAT
736 fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT);
737 #endif
738 exit (EXIT_SUCCESS);
739
740 case OPTION_COMPRESS_DEBUG:
741 if (optarg)
742 {
743 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
744 if (strcasecmp (optarg, "none") == 0)
745 flag_compress_debug = COMPRESS_DEBUG_NONE;
746 else if (strcasecmp (optarg, "zlib") == 0)
747 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
748 else if (strcasecmp (optarg, "zlib-gnu") == 0)
749 flag_compress_debug = COMPRESS_DEBUG_GNU_ZLIB;
750 else if (strcasecmp (optarg, "zlib-gabi") == 0)
751 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
752 else
753 as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
754 optarg);
755 #else
756 as_fatal (_("--compress-debug-sections=%s is unsupported"),
757 optarg);
758 #endif
759 }
760 else
761 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
762 break;
763
764 case OPTION_NOCOMPRESS_DEBUG:
765 flag_compress_debug = COMPRESS_DEBUG_NONE;
766 break;
767
768 case OPTION_DEBUG_PREFIX_MAP:
769 add_debug_prefix_map (optarg);
770 break;
771
772 case OPTION_DEFSYM:
773 {
774 char *s;
775 valueT i;
776 struct defsym_list *n;
777
778 for (s = optarg; *s != '\0' && *s != '='; s++)
779 ;
780 if (*s == '\0')
781 as_fatal (_("bad defsym; format is --defsym name=value"));
782 *s++ = '\0';
783 i = bfd_scan_vma (s, (const char **) NULL, 0);
784 n = XNEW (struct defsym_list);
785 n->next = defsyms;
786 n->name = optarg;
787 n->value = i;
788 defsyms = n;
789 }
790 break;
791
792 #ifdef HAVE_ITBL_CPU
793 case 't':
794 {
795 /* optarg is the name of the file containing the instruction
796 formats, opcodes, register names, etc. */
797 struct itbl_file_list *n;
798
799 if (optarg == NULL)
800 {
801 as_warn (_("no file name following -t option"));
802 break;
803 }
804
805 n = XNEW (struct itbl_file_list);
806 n->next = itbl_files;
807 n->name = optarg;
808 itbl_files = n;
809
810 /* Parse the file and add the new instructions to our internal
811 table. If multiple instruction tables are specified, the
812 information from this table gets appended onto the existing
813 internal table. */
814 itbl_files->name = xstrdup (optarg);
815 if (itbl_parse (itbl_files->name) != 0)
816 as_fatal (_("failed to read instruction table %s\n"),
817 itbl_files->name);
818 }
819 break;
820 #endif
821
822 case OPTION_DEPFILE:
823 start_dependencies (optarg);
824 break;
825
826 case 'g':
827 /* Some backends, eg Alpha and Mips, use the -g switch for their
828 own purposes. So we check here for an explicit -g and allow
829 the backend to decide if it wants to process it. */
830 if ( old_argv[optind - 1][1] == 'g'
831 && md_parse_option (optc, optarg))
832 continue;
833
834 /* We end up here for any -gsomething-not-already-a-long-option.
835 give some useful feedback on not (yet) supported -gdwarfxxx
836 versions/sections/options. */
837 if (startswith (old_argv[optind - 1], "-gdwarf"))
838 as_fatal (_("unknown DWARF option %s\n"), old_argv[optind - 1]);
839 else if (old_argv[optind - 1][1] == 'g' && optarg != NULL)
840 as_fatal (_("unknown option `%s'"), old_argv[optind - 1]);
841
842 if (md_debug_format_selector)
843 debug_type = md_debug_format_selector (& use_gnu_debug_info_extensions);
844 else if (IS_ELF)
845 {
846 debug_type = DEBUG_DWARF2;
847 dwarf_level = 2;
848 }
849 else
850 debug_type = DEBUG_STABS;
851 break;
852
853 case OPTION_GSTABS_PLUS:
854 use_gnu_debug_info_extensions = 1;
855 /* Fall through. */
856 case OPTION_GSTABS:
857 debug_type = DEBUG_STABS;
858 break;
859
860 case OPTION_GDWARF_2:
861 debug_type = DEBUG_DWARF2;
862 dwarf_level = 2;
863 break;
864
865 case OPTION_GDWARF_3:
866 debug_type = DEBUG_DWARF2;
867 dwarf_level = 3;
868 break;
869
870 case OPTION_GDWARF_4:
871 debug_type = DEBUG_DWARF2;
872 dwarf_level = 4;
873 break;
874
875 case OPTION_GDWARF_5:
876 debug_type = DEBUG_DWARF2;
877 dwarf_level = 5;
878 break;
879
880 case OPTION_GDWARF_SECTIONS:
881 flag_dwarf_sections = true;
882 break;
883
884 case OPTION_GDWARF_CIE_VERSION:
885 flag_dwarf_cie_version = atoi (optarg);
886 /* The available CIE versions are 1 (DWARF 2), 3 (DWARF 3), and 4
887 (DWARF 4 and 5). */
888 if (flag_dwarf_cie_version < 1
889 || flag_dwarf_cie_version == 2
890 || flag_dwarf_cie_version > 4)
891 as_fatal (_("Invalid --gdwarf-cie-version `%s'"), optarg);
892 switch (flag_dwarf_cie_version)
893 {
894 case 1:
895 if (dwarf_level < 2)
896 dwarf_level = 2;
897 break;
898 case 3:
899 if (dwarf_level < 3)
900 dwarf_level = 3;
901 break;
902 default:
903 if (dwarf_level < 4)
904 dwarf_level = 4;
905 break;
906 }
907 break;
908
909 case 'J':
910 flag_signed_overflow_ok = 1;
911 break;
912
913 #ifndef WORKING_DOT_WORD
914 case 'K':
915 flag_warn_displacement = 1;
916 break;
917 #endif
918 case 'L':
919 flag_keep_locals = 1;
920 break;
921
922 case OPTION_LISTING_LHS_WIDTH:
923 listing_lhs_width = atoi (optarg);
924 if (listing_lhs_width_second < listing_lhs_width)
925 listing_lhs_width_second = listing_lhs_width;
926 break;
927 case OPTION_LISTING_LHS_WIDTH2:
928 {
929 int tmp = atoi (optarg);
930
931 if (tmp > listing_lhs_width)
932 listing_lhs_width_second = tmp;
933 }
934 break;
935 case OPTION_LISTING_RHS_WIDTH:
936 listing_rhs_width = atoi (optarg);
937 break;
938 case OPTION_LISTING_CONT_LINES:
939 listing_lhs_cont_lines = atoi (optarg);
940 break;
941
942 case 'M':
943 flag_mri = 1;
944 #ifdef TC_M68K
945 flag_m68k_mri = 1;
946 #endif
947 break;
948
949 case 'R':
950 flag_readonly_data_in_text = 1;
951 break;
952
953 case 'W':
954 flag_no_warnings = 1;
955 break;
956
957 case OPTION_WARN:
958 flag_no_warnings = 0;
959 flag_fatal_warnings = 0;
960 break;
961
962 case OPTION_WARN_FATAL:
963 flag_no_warnings = 0;
964 flag_fatal_warnings = 1;
965 break;
966
967 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
968 case OPTION_EXECSTACK:
969 flag_execstack = 1;
970 flag_noexecstack = 0;
971 break;
972
973 case OPTION_NOEXECSTACK:
974 flag_noexecstack = 1;
975 flag_execstack = 0;
976 break;
977
978 case OPTION_SIZE_CHECK:
979 if (strcasecmp (optarg, "error") == 0)
980 flag_allow_nonconst_size = false;
981 else if (strcasecmp (optarg, "warning") == 0)
982 flag_allow_nonconst_size = true;
983 else
984 as_fatal (_("Invalid --size-check= option: `%s'"), optarg);
985 break;
986
987 case OPTION_ELF_STT_COMMON:
988 if (strcasecmp (optarg, "no") == 0)
989 flag_use_elf_stt_common = 0;
990 else if (strcasecmp (optarg, "yes") == 0)
991 flag_use_elf_stt_common = 1;
992 else
993 as_fatal (_("Invalid --elf-stt-common= option: `%s'"),
994 optarg);
995 break;
996
997 case OPTION_SECTNAME_SUBST:
998 flag_sectname_subst = 1;
999 break;
1000
1001 case OPTION_ELF_BUILD_NOTES:
1002 if (strcasecmp (optarg, "no") == 0)
1003 flag_generate_build_notes = false;
1004 else if (strcasecmp (optarg, "yes") == 0)
1005 flag_generate_build_notes = true;
1006 else
1007 as_fatal (_("Invalid --generate-missing-build-notes option: `%s'"),
1008 optarg);
1009 break;
1010
1011 #endif /* OBJ_ELF */
1012
1013 case 'Z':
1014 flag_always_generate_output = 1;
1015 break;
1016
1017 case OPTION_AL:
1018 listing |= LISTING_LISTING;
1019 if (optarg)
1020 listing_filename = xstrdup (optarg);
1021 break;
1022
1023 case OPTION_ALTERNATE:
1024 optarg = old_argv [optind - 1];
1025 while (* optarg == '-')
1026 optarg ++;
1027
1028 if (strcmp (optarg, "alternate") == 0)
1029 {
1030 flag_macro_alternate = 1;
1031 break;
1032 }
1033 optarg ++;
1034 /* Fall through. */
1035
1036 case 'a':
1037 if (optarg)
1038 {
1039 if (optarg != old_argv[optind] && optarg[-1] == '=')
1040 --optarg;
1041
1042 if (md_parse_option (optc, optarg) != 0)
1043 break;
1044
1045 while (*optarg)
1046 {
1047 switch (*optarg)
1048 {
1049 case 'c':
1050 listing |= LISTING_NOCOND;
1051 break;
1052 case 'd':
1053 listing |= LISTING_NODEBUG;
1054 break;
1055 case 'g':
1056 listing |= LISTING_GENERAL;
1057 break;
1058 case 'h':
1059 listing |= LISTING_HLL;
1060 break;
1061 case 'l':
1062 listing |= LISTING_LISTING;
1063 break;
1064 case 'm':
1065 listing |= LISTING_MACEXP;
1066 break;
1067 case 'n':
1068 listing |= LISTING_NOFORM;
1069 break;
1070 case 's':
1071 listing |= LISTING_SYMBOLS;
1072 break;
1073 case '=':
1074 listing_filename = xstrdup (optarg + 1);
1075 optarg += strlen (listing_filename);
1076 break;
1077 default:
1078 as_fatal (_("invalid listing option `%c'"), *optarg);
1079 break;
1080 }
1081 optarg++;
1082 }
1083 }
1084 if (!listing)
1085 listing = LISTING_DEFAULT;
1086 break;
1087
1088 case 'D':
1089 /* DEBUG is implemented: it debugs different
1090 things from other people's assemblers. */
1091 flag_debug = 1;
1092 break;
1093
1094 case 'f':
1095 flag_no_comments = 1;
1096 break;
1097
1098 case 'I':
1099 { /* Include file directory. */
1100 char *temp = xstrdup (optarg);
1101
1102 add_include_dir (temp);
1103 break;
1104 }
1105
1106 case 'o':
1107 out_file_name = xstrdup (optarg);
1108 break;
1109
1110 case 'w':
1111 break;
1112
1113 case 'X':
1114 /* -X means treat warnings as errors. */
1115 break;
1116
1117 case OPTION_REDUCE_MEMORY_OVERHEADS:
1118 break;
1119
1120 case OPTION_HASH_TABLE_SIZE:
1121 break;
1122 }
1123 }
1124
1125 free (shortopts);
1126 free (longopts);
1127
1128 *pargc = new_argc;
1129 *pargv = new_argv;
1130
1131 #ifdef md_after_parse_args
1132 md_after_parse_args ();
1133 #endif
1134 }
1135
1136 static void
dump_statistics(void)1137 dump_statistics (void)
1138 {
1139 long run_time = get_run_time () - start_time;
1140
1141 fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"),
1142 myname, run_time / 1000000, run_time % 1000000);
1143
1144 subsegs_print_statistics (stderr);
1145 write_print_statistics (stderr);
1146 symbol_print_statistics (stderr);
1147 read_print_statistics (stderr);
1148
1149 #ifdef tc_print_statistics
1150 tc_print_statistics (stderr);
1151 #endif
1152
1153 #ifdef obj_print_statistics
1154 obj_print_statistics (stderr);
1155 #endif
1156 }
1157
1158 static void
close_output_file(void)1159 close_output_file (void)
1160 {
1161 output_file_close (out_file_name);
1162 if (!keep_it)
1163 unlink_if_ordinary (out_file_name);
1164 }
1165
1166 /* The interface between the macro code and gas expression handling. */
1167
1168 static size_t
macro_expr(const char * emsg,size_t idx,sb * in,offsetT * val)1169 macro_expr (const char *emsg, size_t idx, sb *in, offsetT *val)
1170 {
1171 expressionS ex;
1172
1173 sb_terminate (in);
1174
1175 temp_ilp (in->ptr + idx);
1176 expression_and_evaluate (&ex);
1177 idx = input_line_pointer - in->ptr;
1178 restore_ilp ();
1179
1180 if (ex.X_op != O_constant)
1181 as_bad ("%s", emsg);
1182
1183 *val = ex.X_add_number;
1184
1185 return idx;
1186 }
1187
1188 /* Here to attempt 1 pass over each input file.
1189 We scan argv[*] looking for filenames or exactly "" which is
1190 shorthand for stdin. Any argv that is NULL is not a file-name.
1191 We set need_pass_2 TRUE if, after this, we still have unresolved
1192 expressions of the form (unknown value)+-(unknown value).
1193
1194 Note the un*x semantics: there is only 1 logical input file, but it
1195 may be a catenation of many 'physical' input files. */
1196
1197 static void
perform_an_assembly_pass(int argc,char ** argv)1198 perform_an_assembly_pass (int argc, char ** argv)
1199 {
1200 int saw_a_file = 0;
1201 #ifndef OBJ_MACH_O
1202 flagword applicable;
1203 #endif
1204
1205 need_pass_2 = 0;
1206
1207 #ifndef OBJ_MACH_O
1208 /* Create the standard sections, and those the assembler uses
1209 internally. */
1210 text_section = subseg_new (TEXT_SECTION_NAME, 0);
1211 data_section = subseg_new (DATA_SECTION_NAME, 0);
1212 bss_section = subseg_new (BSS_SECTION_NAME, 0);
1213 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1214 to have relocs, otherwise we don't find out in time. */
1215 applicable = bfd_applicable_section_flags (stdoutput);
1216 bfd_set_section_flags (text_section,
1217 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1218 | SEC_CODE | SEC_READONLY));
1219 bfd_set_section_flags (data_section,
1220 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1221 | SEC_DATA));
1222 bfd_set_section_flags (bss_section, applicable & SEC_ALLOC);
1223 seg_info (bss_section)->bss = 1;
1224 #endif
1225 subseg_new (BFD_ABS_SECTION_NAME, 0);
1226 subseg_new (BFD_UND_SECTION_NAME, 0);
1227 reg_section = subseg_new ("*GAS `reg' section*", 0);
1228 expr_section = subseg_new ("*GAS `expr' section*", 0);
1229
1230 #ifndef OBJ_MACH_O
1231 subseg_set (text_section, 0);
1232 #endif
1233
1234 /* This may add symbol table entries, which requires having an open BFD,
1235 and sections already created. */
1236 md_begin ();
1237
1238 #ifdef USING_CGEN
1239 gas_cgen_begin ();
1240 #endif
1241 #ifdef obj_begin
1242 obj_begin ();
1243 #endif
1244
1245 /* Skip argv[0]. */
1246 argv++;
1247 argc--;
1248
1249 while (argc--)
1250 {
1251 if (*argv)
1252 { /* Is it a file-name argument? */
1253 PROGRESS (1);
1254 saw_a_file++;
1255 /* argv->"" if stdin desired, else->filename. */
1256 read_a_source_file (*argv);
1257 }
1258 argv++; /* Completed that argv. */
1259 }
1260 if (!saw_a_file)
1261 read_a_source_file ("");
1262 }
1263
1264
1265 int
main(int argc,char ** argv)1266 main (int argc, char ** argv)
1267 {
1268 char ** argv_orig = argv;
1269 struct stat sob;
1270
1271 int macro_strip_at;
1272
1273 start_time = get_run_time ();
1274 signal_init ();
1275
1276 #ifdef HAVE_LC_MESSAGES
1277 setlocale (LC_MESSAGES, "");
1278 #endif
1279 setlocale (LC_CTYPE, "");
1280 bindtextdomain (PACKAGE, LOCALEDIR);
1281 textdomain (PACKAGE);
1282
1283 if (debug_memory)
1284 chunksize = 64;
1285
1286 #ifdef HOST_SPECIAL_INIT
1287 HOST_SPECIAL_INIT (argc, argv);
1288 #endif
1289
1290 myname = argv[0];
1291 xmalloc_set_program_name (myname);
1292
1293 expandargv (&argc, &argv);
1294
1295 START_PROGRESS (myname, 0);
1296
1297 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1298 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1299 #endif
1300
1301 out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
1302
1303 hex_init ();
1304 if (bfd_init () != BFD_INIT_MAGIC)
1305 as_fatal (_("libbfd ABI mismatch"));
1306 bfd_set_error_program_name (myname);
1307
1308 #ifdef USE_EMULATIONS
1309 select_emulation_mode (argc, argv);
1310 #endif
1311
1312 PROGRESS (1);
1313 /* Call parse_args before any of the init/begin functions
1314 so that switches like --hash-size can be honored. */
1315 parse_args (&argc, &argv);
1316
1317 if (argc > 1 && stat (out_file_name, &sob) == 0)
1318 {
1319 int i;
1320
1321 for (i = 1; i < argc; ++i)
1322 {
1323 struct stat sib;
1324
1325 /* Check that the input file and output file are different. */
1326 if (stat (argv[i], &sib) == 0
1327 && sib.st_ino == sob.st_ino
1328 /* POSIX emulating systems may support stat() but if the
1329 underlying file system does not support a file serial number
1330 of some kind then they will return 0 for the inode. So
1331 two files with an inode of 0 may not actually be the same.
1332 On real POSIX systems no ordinary file will ever have an
1333 inode of 0. */
1334 && sib.st_ino != 0
1335 /* Different files may have the same inode number if they
1336 reside on different devices, so check the st_dev field as
1337 well. */
1338 && sib.st_dev == sob.st_dev
1339 /* PR 25572: Only check regular files. Devices, sockets and so
1340 on might actually work as both input and output. Plus there
1341 is a use case for using /dev/null as both input and output
1342 when checking for command line option support in a script:
1343 as --foo /dev/null -o /dev/null; if $? then ... */
1344 && S_ISREG (sib.st_mode))
1345 {
1346 const char *saved_out_file_name = out_file_name;
1347
1348 /* Don't let as_fatal remove the output file! */
1349 out_file_name = NULL;
1350 as_fatal (_("The input '%s' and output '%s' files are the same"),
1351 argv[i], saved_out_file_name);
1352 }
1353 }
1354 }
1355
1356 symbol_begin ();
1357 frag_init ();
1358 subsegs_begin ();
1359 read_begin ();
1360 input_scrub_begin ();
1361 expr_begin ();
1362
1363 /* It has to be called after dump_statistics (). */
1364 xatexit (close_output_file);
1365
1366 if (flag_print_statistics)
1367 xatexit (dump_statistics);
1368
1369 macro_strip_at = 0;
1370 #ifdef TC_I960
1371 macro_strip_at = flag_mri;
1372 #endif
1373
1374 macro_init (flag_macro_alternate, flag_mri, macro_strip_at, macro_expr);
1375
1376 PROGRESS (1);
1377
1378 output_file_create (out_file_name);
1379 gas_assert (stdoutput != 0);
1380
1381 dot_symbol_init ();
1382
1383 #ifdef tc_init_after_args
1384 tc_init_after_args ();
1385 #endif
1386
1387 itbl_init ();
1388
1389 dwarf2_init ();
1390
1391 local_symbol_make (".gasversion.", absolute_section,
1392 &predefined_address_frag, BFD_VERSION / 10000UL);
1393
1394 /* Now that we have fully initialized, and have created the output
1395 file, define any symbols requested by --defsym command line
1396 arguments. */
1397 while (defsyms != NULL)
1398 {
1399 symbolS *sym;
1400 struct defsym_list *next;
1401
1402 sym = symbol_new (defsyms->name, absolute_section,
1403 &zero_address_frag, defsyms->value);
1404 /* Make symbols defined on the command line volatile, so that they
1405 can be redefined inside a source file. This makes this assembler's
1406 behaviour compatible with earlier versions, but it may not be
1407 completely intuitive. */
1408 S_SET_VOLATILE (sym);
1409 symbol_table_insert (sym);
1410 next = defsyms->next;
1411 free (defsyms);
1412 defsyms = next;
1413 }
1414
1415 PROGRESS (1);
1416
1417 /* Assemble it. */
1418 perform_an_assembly_pass (argc, argv);
1419
1420 cond_finish_check (-1);
1421
1422 #ifdef md_end
1423 md_end ();
1424 #endif
1425
1426 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1427 if ((flag_execstack || flag_noexecstack)
1428 && OUTPUT_FLAVOR == bfd_target_elf_flavour)
1429 {
1430 segT gnustack;
1431
1432 gnustack = subseg_new (".note.GNU-stack", 0);
1433 bfd_set_section_flags (gnustack,
1434 SEC_READONLY | (flag_execstack ? SEC_CODE : 0));
1435
1436 }
1437 #endif
1438
1439 /* If we've been collecting dwarf2 .debug_line info, either for
1440 assembly debugging or on behalf of the compiler, emit it now. */
1441 dwarf2_finish ();
1442
1443 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1444 directives from the user or by the backend, emit it now. */
1445 cfi_finish ();
1446
1447 keep_it = 0;
1448 if (seen_at_least_1_file ())
1449 {
1450 int n_warns, n_errs;
1451 char warn_msg[50];
1452 char err_msg[50];
1453
1454 write_object_file ();
1455
1456 n_warns = had_warnings ();
1457 n_errs = had_errors ();
1458
1459 sprintf (warn_msg,
1460 ngettext ("%d warning", "%d warnings", n_warns), n_warns);
1461 sprintf (err_msg,
1462 ngettext ("%d error", "%d errors", n_errs), n_errs);
1463 if (flag_fatal_warnings && n_warns != 0)
1464 {
1465 if (n_errs == 0)
1466 as_bad (_("%s, treating warnings as errors"), warn_msg);
1467 n_errs += n_warns;
1468 }
1469
1470 if (n_errs == 0)
1471 keep_it = 1;
1472 else if (flag_always_generate_output)
1473 {
1474 /* The -Z flag indicates that an object file should be generated,
1475 regardless of warnings and errors. */
1476 keep_it = 1;
1477 fprintf (stderr, _("%s, %s, generating bad object file\n"),
1478 err_msg, warn_msg);
1479 }
1480 }
1481
1482 fflush (stderr);
1483
1484 #ifndef NO_LISTING
1485 listing_print (listing_filename, argv_orig);
1486 #endif
1487
1488 input_scrub_end ();
1489
1490 END_PROGRESS (myname);
1491
1492 /* Use xexit instead of return, because under VMS environments they
1493 may not place the same interpretation on the value given. */
1494 if (had_errors () != 0)
1495 xexit (EXIT_FAILURE);
1496
1497 /* Only generate dependency file if assembler was successful. */
1498 print_dependencies ();
1499
1500 xexit (EXIT_SUCCESS);
1501 }
1502