1 /* as.c - GAS main program.
2 Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
4 Free Software Foundation, Inc.
6 This file is part of GAS, the GNU Assembler.
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 3, or (at your option)
13 GAS is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
16 License for more details.
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, 51 Franklin Street - Fifth Floor, Boston, MA
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
31 Since no-one else says they will support them in future: I
32 don't support them now. */
38 #include "output-file.h"
41 #include "dwarf2dbg.h"
42 #include "dw2gencfi.h"
52 #ifdef NEED_DECLARATION_SBRK
58 /* Perform any cgen specific initialisation for gas. */
59 extern void gas_cgen_begin (void);
62 /* We build a list of defsyms as we read the options, and then define
63 them after we have initialized everything. */
66 struct defsym_list *next;
72 /* True if a listing is wanted. */
75 /* Type of debugging to generate. */
76 enum debug_info_type debug_type = DEBUG_UNSPECIFIED;
77 int use_gnu_debug_info_extensions = 0;
79 #ifndef MD_DEBUG_FORMAT_SELECTOR
80 #define MD_DEBUG_FORMAT_SELECTOR NULL
82 static enum debug_info_type (*md_debug_format_selector) (int *) = MD_DEBUG_FORMAT_SELECTOR;
84 /* Maximum level of macro nesting. */
85 int max_macro_nest = 100;
90 /* The default obstack chunk size. If we set this to zero, the
91 obstack code will use whatever will fit in a 4096 byte block. */
94 /* To monitor memory allocation more effectively, make this non-zero.
95 Then the chunk sizes for gas and bfd will be reduced. */
98 /* Enable verbose mode. */
101 /* Keep the output file. */
110 /* Name of listing file. */
111 static char *listing_filename = NULL;
113 static struct defsym_list *defsyms;
116 /* Keep a record of the itbl files we read in. */
117 struct itbl_file_list
119 struct itbl_file_list *next;
122 static struct itbl_file_list *itbl_files;
125 static long start_time;
127 static int flag_macro_alternate;
130 #ifdef USE_EMULATIONS
131 #define EMULATION_ENVIRON "AS_EMULATION"
133 extern struct emulation mipsbelf, mipslelf, mipself;
134 extern struct emulation mipsbecoff, mipslecoff, mipsecoff;
135 extern struct emulation i386coff, i386elf, i386aout;
136 extern struct emulation crisaout, criself;
138 static struct emulation *const emulations[] = { EMULATIONS };
139 static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]);
142 select_emulation_mode (int argc, char **argv)
147 for (i = 1; i < argc; i++)
148 if (!strncmp ("--em", argv[i], 4))
154 p = strchr (argv[i], '=');
161 as_fatal (_("missing emulation mode name"));
166 em = getenv (EMULATION_ENVIRON);
168 em = DEFAULT_EMULATION;
172 for (i = 0; i < n_emulations; i++)
173 if (!strcmp (emulations[i]->name, em))
175 if (i == n_emulations)
176 as_fatal (_("unrecognized emulation name `%s'"), em);
177 this_emulation = emulations[i];
180 this_emulation = emulations[0];
182 this_emulation->init ();
186 default_emul_bfd_name (void)
193 common_emul_init (void)
195 this_format = this_emulation->format;
197 if (this_emulation->leading_underscore == 2)
198 this_emulation->leading_underscore = this_format->dfl_leading_underscore;
200 if (this_emulation->default_endian != 2)
201 target_big_endian = this_emulation->default_endian;
203 if (this_emulation->fake_label_name == 0)
205 if (this_emulation->leading_underscore)
206 this_emulation->fake_label_name = "L0\001";
208 /* What other parameters should we test? */
209 this_emulation->fake_label_name = ".L0\001";
215 print_version_id (void)
223 fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s\n"),
224 VERSION, TARGET_ALIAS, BFD_VERSION_STRING);
228 show_usage (FILE * stream)
230 fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname);
232 fprintf (stream, _("\
234 -a[sub-option...] turn on listings\n\
235 Sub-options [default hls]:\n\
236 c omit false conditionals\n\
237 d omit debugging directives\n\
238 g include general info\n\
239 h include high-level source\n\
240 l include assembly\n\
241 m include macro expansions\n\
242 n omit forms processing\n\
244 =FILE list to FILE (must be last sub-option)\n"));
246 fprintf (stream, _("\
247 --alternate initially turn on alternate macro syntax\n"));
248 fprintf (stream, _("\
249 --compress-debug-sections\n\
250 compress DWARF debug sections using zlib\n"));
251 fprintf (stream, _("\
252 --nocompress-debug-sections\n\
253 don't compress DWARF debug sections\n"));
254 fprintf (stream, _("\
255 -D produce assembler debugging messages\n"));
256 fprintf (stream, _("\
257 --debug-prefix-map OLD=NEW\n\
258 map OLD to NEW in debug information\n"));
259 fprintf (stream, _("\
260 --defsym SYM=VAL define symbol SYM to given value\n"));
261 #ifdef USE_EMULATIONS
268 for (i = 0; i < n_emulations - 1; i++)
269 fprintf (stream, "%s | ", emulations[i]->name);
270 fprintf (stream, "%s]\n", emulations[i]->name);
272 def_em = getenv (EMULATION_ENVIRON);
274 def_em = DEFAULT_EMULATION;
275 fprintf (stream, _("\
276 emulate output (default %s)\n"), def_em);
279 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
280 fprintf (stream, _("\
281 --execstack require executable stack for this object\n"));
282 fprintf (stream, _("\
283 --noexecstack don't require executable stack for this object\n"));
285 fprintf (stream, _("\
286 -f skip whitespace and comment preprocessing\n"));
287 fprintf (stream, _("\
288 -g --gen-debug generate debugging information\n"));
289 fprintf (stream, _("\
290 --gstabs generate STABS debugging information\n"));
291 fprintf (stream, _("\
292 --gstabs+ generate STABS debug info with GNU extensions\n"));
293 fprintf (stream, _("\
294 --gdwarf-2 generate DWARF2 debugging information\n"));
295 fprintf (stream, _("\
296 --hash-size=<value> set the hash table size close to <value>\n"));
297 fprintf (stream, _("\
298 --help show this message and exit\n"));
299 fprintf (stream, _("\
300 --target-help show target specific options\n"));
301 fprintf (stream, _("\
302 -I DIR add DIR to search list for .include directives\n"));
303 fprintf (stream, _("\
304 -J don't warn about signed overflow\n"));
305 fprintf (stream, _("\
306 -K warn when differences altered for long displacements\n"));
307 fprintf (stream, _("\
308 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
309 fprintf (stream, _("\
310 -M,--mri assemble in MRI compatibility mode\n"));
311 fprintf (stream, _("\
312 --MD FILE write dependency information in FILE (default none)\n"));
313 fprintf (stream, _("\
315 fprintf (stream, _("\
316 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
317 fprintf (stream, _("\
318 -R fold data section into text section\n"));
319 fprintf (stream, _("\
320 --reduce-memory-overheads \n\
321 prefer smaller memory use at the cost of longer\n\
323 fprintf (stream, _("\
324 --statistics print various measured statistics from execution\n"));
325 fprintf (stream, _("\
326 --strip-local-absolute strip local absolute symbols\n"));
327 fprintf (stream, _("\
328 --traditional-format Use same format as native assembler when possible\n"));
329 fprintf (stream, _("\
330 --version print assembler version number and exit\n"));
331 fprintf (stream, _("\
332 -W --no-warn suppress warnings\n"));
333 fprintf (stream, _("\
334 --warn don't suppress warnings\n"));
335 fprintf (stream, _("\
336 --fatal-warnings treat warnings as errors\n"));
338 fprintf (stream, _("\
339 --itbl INSTTBL extend instruction set to include instructions\n\
340 matching the specifications defined in file INSTTBL\n"));
342 fprintf (stream, _("\
344 fprintf (stream, _("\
346 fprintf (stream, _("\
347 -Z generate object file even after errors\n"));
348 fprintf (stream, _("\
349 --listing-lhs-width set the width in words of the output data column of\n\
351 fprintf (stream, _("\
352 --listing-lhs-width2 set the width in words of the continuation lines\n\
353 of the output data column; ignored if smaller than\n\
354 the width of the first line\n"));
355 fprintf (stream, _("\
356 --listing-rhs-width set the max width in characters of the lines from\n\
357 the source file\n"));
358 fprintf (stream, _("\
359 --listing-cont-lines set the maximum number of continuation lines used\n\
360 for the output data column of the listing\n"));
361 fprintf (stream, _("\
362 @FILE read options from FILE\n"));
364 md_show_usage (stream);
366 fputc ('\n', stream);
368 if (REPORT_BUGS_TO[0] && stream == stdout)
369 fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
372 /* Since it is easy to do here we interpret the special arg "-"
373 to mean "use stdin" and we set that argv[] pointing to "".
374 After we have munged argv[], the only things left are source file
375 name(s) and ""(s) denoting stdin. These file names are used
376 (perhaps more than once) later.
378 check for new machine-dep cmdline options in
379 md_parse_option definitions in config/tc-*.c. */
382 parse_args (int * pargc, char *** pargv)
388 /* Starting the short option string with '-' is for programs that
389 expect options and other ARGV-elements in any order and that care about
390 the ordering of the two. We describe each non-option ARGV-element
391 as if it were the argument of an option with character code 1. */
393 extern const char *md_shortopts;
394 static const char std_shortopts[] =
397 #ifndef WORKING_DOT_WORD
398 /* -K is not meaningful if .word is not being hacked. */
401 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
403 /* -v takes an argument on VMS, so we don't make it a generic
409 /* New option for extending instruction set (see also --itbl below). */
414 struct option *longopts;
415 extern struct option md_longopts[];
416 extern size_t md_longopts_size;
417 /* Codes used for the long options with no short synonyms. */
420 OPTION_HELP = OPTION_STD_BASE,
427 OPTION_DEBUG_PREFIX_MAP,
429 OPTION_LISTING_LHS_WIDTH,
430 OPTION_LISTING_LHS_WIDTH2,
431 OPTION_LISTING_RHS_WIDTH,
432 OPTION_LISTING_CONT_LINES,
437 OPTION_STRIP_LOCAL_ABSOLUTE,
438 OPTION_TRADITIONAL_FORMAT,
445 OPTION_HASH_TABLE_SIZE,
446 OPTION_REDUCE_MEMORY_OVERHEADS,
448 OPTION_COMPRESS_DEBUG,
449 OPTION_NOCOMPRESS_DEBUG
450 /* When you add options here, check that they do
451 not collide with OPTION_MD_BASE. See as.h. */
454 static const struct option std_longopts[] =
456 /* Note: commas are placed at the start of the line rather than
457 the end of the preceeding line so that it is simpler to
458 selectively add and remove lines from this list. */
459 {"alternate", no_argument, NULL, OPTION_ALTERNATE}
460 /* The entry for "a" is here to prevent getopt_long_only() from
461 considering that -a is an abbreviation for --alternate. This is
462 necessary because -a=<FILE> is a valid switch but getopt would
463 normally reject it since --alternate does not take an argument. */
464 ,{"a", optional_argument, NULL, 'a'}
465 /* Handle -al=<FILE>. */
466 ,{"al", optional_argument, NULL, OPTION_AL}
467 ,{"compress-debug-sections", no_argument, NULL, OPTION_COMPRESS_DEBUG}
468 ,{"nocompress-debug-sections", no_argument, NULL, OPTION_NOCOMPRESS_DEBUG}
469 ,{"debug-prefix-map", required_argument, NULL, OPTION_DEBUG_PREFIX_MAP}
470 ,{"defsym", required_argument, NULL, OPTION_DEFSYM}
471 ,{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG}
472 ,{"emulation", required_argument, NULL, OPTION_EMULATION}
473 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
474 ,{"execstack", no_argument, NULL, OPTION_EXECSTACK}
475 ,{"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK}
477 ,{"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL}
478 ,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF2}
479 /* GCC uses --gdwarf-2 but GAS uses to use --gdwarf2,
480 so we keep it here for backwards compatibility. */
481 ,{"gdwarf2", no_argument, NULL, OPTION_GDWARF2}
482 ,{"gen-debug", no_argument, NULL, 'g'}
483 ,{"gstabs", no_argument, NULL, OPTION_GSTABS}
484 ,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS}
485 ,{"hash-size", required_argument, NULL, OPTION_HASH_TABLE_SIZE}
486 ,{"help", no_argument, NULL, OPTION_HELP}
488 /* New option for extending instruction set (see also -t above).
489 The "-t file" or "--itbl file" option extends the basic set of
490 valid instructions by reading "file", a text file containing a
491 list of instruction formats. The additional opcodes and their
492 formats are added to the built-in set of instructions, and
493 mnemonics for new registers may also be defined. */
494 ,{"itbl", required_argument, NULL, 't'}
496 /* getopt allows abbreviations, so we do this to stop it from
497 treating -k as an abbreviation for --keep-locals. Some
498 ports use -k to enable PIC assembly. */
499 ,{"keep-locals", no_argument, NULL, 'L'}
500 ,{"keep-locals", no_argument, NULL, 'L'}
501 ,{"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH}
502 ,{"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2}
503 ,{"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH}
504 ,{"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES}
505 ,{"MD", required_argument, NULL, OPTION_DEPFILE}
506 ,{"mri", no_argument, NULL, 'M'}
507 ,{"nocpp", no_argument, NULL, OPTION_NOCPP}
508 ,{"no-warn", no_argument, NULL, 'W'}
509 ,{"reduce-memory-overheads", no_argument, NULL, OPTION_REDUCE_MEMORY_OVERHEADS}
510 ,{"statistics", no_argument, NULL, OPTION_STATISTICS}
511 ,{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE}
512 ,{"version", no_argument, NULL, OPTION_VERSION}
513 ,{"verbose", no_argument, NULL, OPTION_VERBOSE}
514 ,{"target-help", no_argument, NULL, OPTION_TARGET_HELP}
515 ,{"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT}
516 ,{"warn", no_argument, NULL, OPTION_WARN}
519 /* Construct the option lists from the standard list and the target
520 dependent list. Include space for an extra NULL option and
521 always NULL terminate. */
522 shortopts = concat (std_shortopts, md_shortopts, (char *) NULL);
523 longopts = (struct option *) xmalloc (sizeof (std_longopts)
524 + md_longopts_size + sizeof (struct option));
525 memcpy (longopts, std_longopts, sizeof (std_longopts));
526 memcpy (((char *) longopts) + sizeof (std_longopts), md_longopts, md_longopts_size);
527 memset (((char *) longopts) + sizeof (std_longopts) + md_longopts_size,
528 0, sizeof (struct option));
530 /* Make a local copy of the old argv. */
534 /* Initialize a new argv that contains no options. */
535 new_argv = (char **) xmalloc (sizeof (char *) * (old_argc + 1));
536 new_argv[0] = old_argv[0];
538 new_argv[new_argc] = NULL;
542 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
543 indicate a long option. */
545 int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts,
554 /* md_parse_option should return 1 if it recognizes optc,
556 if (md_parse_option (optc, optarg) != 0)
558 /* `-v' isn't included in the general short_opts list, so check for
559 it explicitly here before deciding we've gotten a bad argument. */
563 /* Telling getopt to treat -v's value as optional can result
564 in it picking up a following filename argument here. The
565 VMS code in md_parse_option can return 0 in that case,
566 but it has no way of pushing the filename argument back. */
567 if (optarg && *optarg)
568 new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL;
579 as_bad (_("unrecognized option -%c%s"), optc, optarg ? optarg : "");
585 case 1: /* File name. */
586 if (!strcmp (optarg, "-"))
588 new_argv[new_argc++] = optarg;
589 new_argv[new_argc] = NULL;
592 case OPTION_TARGET_HELP:
593 md_show_usage (stdout);
603 case OPTION_STATISTICS:
604 flag_print_statistics = 1;
607 case OPTION_STRIP_LOCAL_ABSOLUTE:
608 flag_strip_local_absolute = 1;
611 case OPTION_TRADITIONAL_FORMAT:
612 flag_traditional_format = 1;
616 /* This output is intended to follow the GNU standards document. */
617 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING);
618 printf (_("Copyright 2010 Free Software Foundation, Inc.\n"));
620 This program is free software; you may redistribute it under the terms of\n\
621 the GNU General Public License version 3 or later.\n\
622 This program has absolutely no warranty.\n"));
623 printf (_("This assembler was configured for a target of `%s'.\n"),
627 case OPTION_EMULATION:
628 #ifdef USE_EMULATIONS
629 if (strcmp (optarg, this_emulation->name))
630 as_fatal (_("multiple emulation names specified"));
632 as_fatal (_("emulations not handled in this configuration"));
636 case OPTION_DUMPCONFIG:
637 fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS);
638 fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL);
639 fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU);
640 #ifdef TARGET_OBJ_FORMAT
641 fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT);
644 fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT);
648 case OPTION_COMPRESS_DEBUG:
649 flag_compress_debug = 1;
652 case OPTION_NOCOMPRESS_DEBUG:
653 flag_compress_debug = 0;
656 case OPTION_DEBUG_PREFIX_MAP:
657 add_debug_prefix_map (optarg);
664 struct defsym_list *n;
666 for (s = optarg; *s != '\0' && *s != '='; s++)
669 as_fatal (_("bad defsym; format is --defsym name=value"));
671 i = bfd_scan_vma (s, (const char **) NULL, 0);
672 n = (struct defsym_list *) xmalloc (sizeof *n);
683 /* optarg is the name of the file containing the instruction
684 formats, opcodes, register names, etc. */
685 struct itbl_file_list *n;
689 as_warn (_("no file name following -t option"));
693 n = xmalloc (sizeof * n);
694 n->next = itbl_files;
698 /* Parse the file and add the new instructions to our internal
699 table. If multiple instruction tables are specified, the
700 information from this table gets appended onto the existing
702 itbl_files->name = xstrdup (optarg);
703 if (itbl_parse (itbl_files->name) != 0)
704 as_fatal (_("failed to read instruction table %s\n"),
711 start_dependencies (optarg);
715 /* Some backends, eg Alpha and Mips, use the -g switch for their
716 own purposes. So we check here for an explicit -g and allow
717 the backend to decide if it wants to process it. */
718 if ( old_argv[optind - 1][1] == 'g'
719 && md_parse_option (optc, optarg))
722 if (md_debug_format_selector)
723 debug_type = md_debug_format_selector (& use_gnu_debug_info_extensions);
725 debug_type = DEBUG_DWARF2;
727 debug_type = DEBUG_STABS;
730 case OPTION_GSTABS_PLUS:
731 use_gnu_debug_info_extensions = 1;
734 debug_type = DEBUG_STABS;
738 debug_type = DEBUG_DWARF2;
742 flag_signed_overflow_ok = 1;
745 #ifndef WORKING_DOT_WORD
747 flag_warn_displacement = 1;
751 flag_keep_locals = 1;
754 case OPTION_LISTING_LHS_WIDTH:
755 listing_lhs_width = atoi (optarg);
756 if (listing_lhs_width_second < listing_lhs_width)
757 listing_lhs_width_second = listing_lhs_width;
759 case OPTION_LISTING_LHS_WIDTH2:
761 int tmp = atoi (optarg);
763 if (tmp > listing_lhs_width)
764 listing_lhs_width_second = tmp;
767 case OPTION_LISTING_RHS_WIDTH:
768 listing_rhs_width = atoi (optarg);
770 case OPTION_LISTING_CONT_LINES:
771 listing_lhs_cont_lines = atoi (optarg);
782 flag_readonly_data_in_text = 1;
786 flag_no_warnings = 1;
790 flag_no_warnings = 0;
791 flag_fatal_warnings = 0;
794 case OPTION_WARN_FATAL:
795 flag_no_warnings = 0;
796 flag_fatal_warnings = 1;
799 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
800 case OPTION_EXECSTACK:
802 flag_noexecstack = 0;
805 case OPTION_NOEXECSTACK:
806 flag_noexecstack = 1;
811 flag_always_generate_output = 1;
815 listing |= LISTING_LISTING;
817 listing_filename = xstrdup (optarg);
820 case OPTION_ALTERNATE:
821 optarg = old_argv [optind - 1];
822 while (* optarg == '-')
825 if (strcmp (optarg, "alternate") == 0)
827 flag_macro_alternate = 1;
836 if (optarg != old_argv[optind] && optarg[-1] == '=')
839 if (md_parse_option (optc, optarg) != 0)
847 listing |= LISTING_NOCOND;
850 listing |= LISTING_NODEBUG;
853 listing |= LISTING_GENERAL;
856 listing |= LISTING_HLL;
859 listing |= LISTING_LISTING;
862 listing |= LISTING_MACEXP;
865 listing |= LISTING_NOFORM;
868 listing |= LISTING_SYMBOLS;
871 listing_filename = xstrdup (optarg + 1);
872 optarg += strlen (listing_filename);
875 as_fatal (_("invalid listing option `%c'"), *optarg);
882 listing = LISTING_DEFAULT;
886 /* DEBUG is implemented: it debugs different
887 things from other people's assemblers. */
892 flag_no_comments = 1;
896 { /* Include file directory. */
897 char *temp = xstrdup (optarg);
899 add_include_dir (temp);
904 out_file_name = xstrdup (optarg);
911 /* -X means treat warnings as errors. */
914 case OPTION_REDUCE_MEMORY_OVERHEADS:
915 /* The only change we make at the moment is to reduce
916 the size of the hash tables that we use. */
917 set_gas_hash_table_size (4051);
920 case OPTION_HASH_TABLE_SIZE:
922 unsigned long new_size;
924 new_size = strtoul (optarg, NULL, 0);
926 set_gas_hash_table_size (new_size);
928 as_fatal (_("--hash-size needs a numeric argument"));
940 #ifdef md_after_parse_args
941 md_after_parse_args ();
946 dump_statistics (void)
949 char *lim = (char *) sbrk (0);
951 long run_time = get_run_time () - start_time;
953 fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"),
954 myname, run_time / 1000000, run_time % 1000000);
956 fprintf (stderr, _("%s: data size %ld\n"),
957 myname, (long) (lim - (char *) &environ));
960 subsegs_print_statistics (stderr);
961 write_print_statistics (stderr);
962 symbol_print_statistics (stderr);
963 read_print_statistics (stderr);
965 #ifdef tc_print_statistics
966 tc_print_statistics (stderr);
969 #ifdef obj_print_statistics
970 obj_print_statistics (stderr);
975 close_output_file (void)
977 output_file_close (out_file_name);
979 unlink_if_ordinary (out_file_name);
982 /* The interface between the macro code and gas expression handling. */
985 macro_expr (const char *emsg, int idx, sb *in, int *val)
992 hold = input_line_pointer;
993 input_line_pointer = in->ptr + idx;
994 expression_and_evaluate (&ex);
995 idx = input_line_pointer - in->ptr;
996 input_line_pointer = hold;
998 if (ex.X_op != O_constant)
1001 *val = (int) ex.X_add_number;
1006 /* Here to attempt 1 pass over each input file.
1007 We scan argv[*] looking for filenames or exactly "" which is
1008 shorthand for stdin. Any argv that is NULL is not a file-name.
1009 We set need_pass_2 TRUE if, after this, we still have unresolved
1010 expressions of the form (unknown value)+-(unknown value).
1012 Note the un*x semantics: there is only 1 logical input file, but it
1013 may be a catenation of many 'physical' input files. */
1016 perform_an_assembly_pass (int argc, char ** argv)
1019 flagword applicable;
1023 /* Create the standard sections, and those the assembler uses
1025 text_section = subseg_new (TEXT_SECTION_NAME, 0);
1026 data_section = subseg_new (DATA_SECTION_NAME, 0);
1027 bss_section = subseg_new (BSS_SECTION_NAME, 0);
1028 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1029 to have relocs, otherwise we don't find out in time. */
1030 applicable = bfd_applicable_section_flags (stdoutput);
1031 bfd_set_section_flags (stdoutput, text_section,
1032 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1033 | SEC_CODE | SEC_READONLY));
1034 bfd_set_section_flags (stdoutput, data_section,
1035 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1037 bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC);
1038 seg_info (bss_section)->bss = 1;
1039 subseg_new (BFD_ABS_SECTION_NAME, 0);
1040 subseg_new (BFD_UND_SECTION_NAME, 0);
1041 reg_section = subseg_new ("*GAS `reg' section*", 0);
1042 expr_section = subseg_new ("*GAS `expr' section*", 0);
1044 subseg_set (text_section, 0);
1046 /* This may add symbol table entries, which requires having an open BFD,
1047 and sections already created. */
1064 { /* Is it a file-name argument? */
1067 /* argv->"" if stdin desired, else->filename. */
1068 read_a_source_file (*argv);
1070 argv++; /* Completed that argv. */
1073 read_a_source_file ("");
1078 create_obj_attrs_section (void)
1085 size = bfd_elf_obj_attr_size (stdoutput);
1088 name = get_elf_backend_data (stdoutput)->obj_attrs_section;
1090 name = ".gnu.attributes";
1091 s = subseg_new (name, 0);
1092 elf_section_type (s)
1093 = get_elf_backend_data (stdoutput)->obj_attrs_section_type;
1094 bfd_set_section_flags (stdoutput, s, SEC_READONLY | SEC_DATA);
1096 p = frag_more (size);
1097 bfd_elf_set_obj_attr_contents (stdoutput, (bfd_byte *)p, size);
1104 main (int argc, char ** argv)
1106 char ** argv_orig = argv;
1110 start_time = get_run_time ();
1112 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
1113 setlocale (LC_MESSAGES, "");
1115 #if defined (HAVE_SETLOCALE)
1116 setlocale (LC_CTYPE, "");
1118 bindtextdomain (PACKAGE, LOCALEDIR);
1119 textdomain (PACKAGE);
1124 #ifdef HOST_SPECIAL_INIT
1125 HOST_SPECIAL_INIT (argc, argv);
1129 xmalloc_set_program_name (myname);
1131 expandargv (&argc, &argv);
1133 START_PROGRESS (myname, 0);
1135 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
1136 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
1139 out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
1143 bfd_set_error_program_name (myname);
1145 #ifdef USE_EMULATIONS
1146 select_emulation_mode (argc, argv);
1150 /* Call parse_args before any of the init/begin functions
1151 so that switches like --hash-size can be honored. */
1152 parse_args (&argc, &argv);
1157 input_scrub_begin ();
1160 /* It has to be called after dump_statistics (). */
1161 xatexit (close_output_file);
1163 if (flag_print_statistics)
1164 xatexit (dump_statistics);
1168 macro_strip_at = flag_mri;
1171 macro_init (flag_macro_alternate, flag_mri, macro_strip_at, macro_expr);
1175 output_file_create (out_file_name);
1176 gas_assert (stdoutput != 0);
1178 #ifdef tc_init_after_args
1179 tc_init_after_args ();
1186 /* Now that we have fully initialized, and have created the output
1187 file, define any symbols requested by --defsym command line
1189 while (defsyms != NULL)
1192 struct defsym_list *next;
1194 sym = symbol_new (defsyms->name, absolute_section, defsyms->value,
1195 &zero_address_frag);
1196 /* Make symbols defined on the command line volatile, so that they
1197 can be redefined inside a source file. This makes this assembler's
1198 behaviour compatible with earlier versions, but it may not be
1199 completely intuitive. */
1200 S_SET_VOLATILE (sym);
1201 symbol_table_insert (sym);
1202 next = defsyms->next;
1210 perform_an_assembly_pass (argc, argv);
1212 cond_finish_check (-1);
1220 create_obj_attrs_section ();
1223 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
1224 if ((flag_execstack || flag_noexecstack)
1225 && OUTPUT_FLAVOR == bfd_target_elf_flavour)
1229 gnustack = subseg_new (".note.GNU-stack", 0);
1230 bfd_set_section_flags (stdoutput, gnustack,
1231 SEC_READONLY | (flag_execstack ? SEC_CODE : 0));
1236 /* If we've been collecting dwarf2 .debug_line info, either for
1237 assembly debugging or on behalf of the compiler, emit it now. */
1240 /* If we constructed dwarf2 .eh_frame info, either via .cfi
1241 directives from the user or by the backend, emit it now. */
1244 if (seen_at_least_1_file ()
1245 && (flag_always_generate_output || had_errors () == 0))
1250 /* This used to be done at the start of write_object_file in
1251 write.c, but that caused problems when doing listings when
1252 keep_it was zero. This could probably be moved above md_end, but
1253 I didn't want to risk the change. */
1257 write_object_file ();
1262 listing_print (listing_filename, argv_orig);
1265 if (flag_fatal_warnings && had_warnings () > 0 && had_errors () == 0)
1266 as_bad (_("%d warnings, treating warnings as errors"), had_warnings ());
1268 if (had_errors () > 0 && ! flag_always_generate_output)
1273 END_PROGRESS (myname);
1275 /* Use xexit instead of return, because under VMS environments they
1276 may not place the same interpretation on the value given. */
1277 if (had_errors () > 0)
1278 xexit (EXIT_FAILURE);
1280 /* Only generate dependency file if assembler was successful. */
1281 print_dependencies ();
1283 xexit (EXIT_SUCCESS);