1 /* as.c - GAS main program.
2 Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
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 2, or (at your option)
13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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.
41 #include "output-file.h"
44 #include "dwarf2dbg.h"
49 #define itbl_parse(itbl_file) 1
54 #ifdef NEED_DECLARATION_SBRK
59 static void show_usage PARAMS ((FILE *));
60 static void parse_args PARAMS ((int *, char ***));
61 static void dump_statistics PARAMS ((void));
62 static void perform_an_assembly_pass PARAMS ((int argc, char **argv));
63 static int macro_expr PARAMS ((const char *, int, sb *, int *));
65 /* True if a listing is wanted. */
68 /* Name of listing file. */
69 static char *listing_filename = NULL;
71 /* Type of debugging to generate. */
73 enum debug_info_type debug_type = DEBUG_UNSPECIFIED;
75 /* Maximum level of macro nesting. */
76 int max_macro_nest = 100;
81 segT reg_section, expr_section;
82 segT text_section, data_section, bss_section;
85 /* The default obstack chunk size. If we set this to zero, the
86 obstack code will use whatever will fit in a 4096 byte block. */
89 /* To monitor memory allocation more effectively, make this non-zero.
90 Then the chunk sizes for gas and bfd will be reduced. */
93 /* We build a list of defsyms as we read the options, and then define
94 them after we have initialized everything. */
97 struct defsym_list *next;
102 static struct defsym_list *defsyms;
104 /* Keep a record of the itbl files we read in. */
106 struct itbl_file_list {
107 struct itbl_file_list *next;
111 static struct itbl_file_list *itbl_files;
113 #ifdef USE_EMULATIONS
114 #define EMULATION_ENVIRON "AS_EMULATION"
116 extern struct emulation mipsbelf, mipslelf, mipself;
117 extern struct emulation mipsbecoff, mipslecoff, mipsecoff;
118 extern struct emulation i386coff, i386elf, i386aout;
119 extern struct emulation crisaout, criself;
121 static struct emulation *const emulations[] = { EMULATIONS };
122 static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]);
124 static void select_emulation_mode PARAMS ((int, char **));
127 select_emulation_mode (argc, argv)
134 for (i = 1; i < argc; i++)
135 if (!strncmp ("--em", argv[i], 4))
141 p = strchr (argv[i], '=');
148 as_fatal (_("missing emulation mode name"));
153 em = getenv (EMULATION_ENVIRON);
155 em = DEFAULT_EMULATION;
159 for (i = 0; i < n_emulations; i++)
160 if (!strcmp (emulations[i]->name, em))
162 if (i == n_emulations)
163 as_fatal (_("unrecognized emulation name `%s'"), em);
164 this_emulation = emulations[i];
167 this_emulation = emulations[0];
169 this_emulation->init ();
173 default_emul_bfd_name ()
182 this_format = this_emulation->format;
184 if (this_emulation->leading_underscore == 2)
185 this_emulation->leading_underscore = this_format->dfl_leading_underscore;
187 if (this_emulation->default_endian != 2)
188 target_big_endian = this_emulation->default_endian;
190 if (this_emulation->fake_label_name == 0)
192 if (this_emulation->leading_underscore)
193 this_emulation->fake_label_name = "L0\001";
195 /* What other parameters should we test? */
196 this_emulation->fake_label_name = ".L0\001";
210 fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s"),
211 VERSION, TARGET_ALIAS, BFD_VERSION);
213 fprintf (stderr, _("GNU assembler version %s (%s)"), VERSION, TARGET_ALIAS);
215 fprintf (stderr, "\n");
222 fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname);
224 fprintf (stream, _("\
226 -a[sub-option...] turn on listings\n\
227 Sub-options [default hls]:\n\
228 c omit false conditionals\n\
229 d omit debugging directives\n\
230 h include high-level source\n\
231 l include assembly\n\
232 m include macro expansions\n\
233 n omit forms processing\n\
235 =FILE list to FILE (must be last sub-option)\n"));
237 fprintf (stream, _("\
238 -D produce assembler debugging messages\n"));
239 fprintf (stream, _("\
240 --defsym SYM=VAL define symbol SYM to given value\n"));
241 #ifdef USE_EMULATIONS
248 for (i = 0; i < n_emulations - 1; i++)
249 fprintf (stream, "%s | ", emulations[i]->name);
250 fprintf (stream, "%s]\n", emulations[i]->name);
252 def_em = getenv (EMULATION_ENVIRON);
254 def_em = DEFAULT_EMULATION;
255 fprintf (stream, _("\
256 emulate output (default %s)\n"), def_em);
259 fprintf (stream, _("\
260 -f skip whitespace and comment preprocessing\n"));
261 fprintf (stream, _("\
262 --gstabs generate stabs debugging information\n"));
263 fprintf (stream, _("\
264 --gdwarf2 generate DWARF2 debugging information\n"));
265 fprintf (stream, _("\
266 --help show this message and exit\n"));
267 fprintf (stream, _("\
268 --target-help show target specific options\n"));
269 fprintf (stream, _("\
270 -I DIR add DIR to search list for .include directives\n"));
271 fprintf (stream, _("\
272 -J don't warn about signed overflow\n"));
273 fprintf (stream, _("\
274 -K warn when differences altered for long displacements\n"));
275 fprintf (stream, _("\
276 -L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
277 fprintf (stream, _("\
278 -M,--mri assemble in MRI compatibility mode\n"));
279 fprintf (stream, _("\
280 --MD FILE write dependency information in FILE (default none)\n"));
281 fprintf (stream, _("\
283 fprintf (stream, _("\
284 -o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
285 fprintf (stream, _("\
286 -R fold data section into text section\n"));
287 fprintf (stream, _("\
288 --statistics print various measured statistics from execution\n"));
289 fprintf (stream, _("\
290 --strip-local-absolute strip local absolute symbols\n"));
291 fprintf (stream, _("\
292 --traditional-format Use same format as native assembler when possible\n"));
293 fprintf (stream, _("\
294 --version print assembler version number and exit\n"));
295 fprintf (stream, _("\
296 -W --no-warn suppress warnings\n"));
297 fprintf (stream, _("\
298 --warn don't suppress warnings\n"));
299 fprintf (stream, _("\
300 --fatal-warnings treat warnings as errors\n"));
301 fprintf (stream, _("\
302 --itbl INSTTBL extend instruction set to include instructions\n\
303 matching the specifications defined in file INSTTBL\n"));
304 fprintf (stream, _("\
306 fprintf (stream, _("\
308 fprintf (stream, _("\
309 -Z generate object file even after errors\n"));
310 fprintf (stream, _("\
311 --listing-lhs-width set the width in words of the output data column of\n\
313 fprintf (stream, _("\
314 --listing-lhs-width2 set the width in words of the continuation lines\n\
315 of the output data column; ignored if smaller than\n\
316 the width of the first line\n"));
317 fprintf (stream, _("\
318 --listing-rhs-width set the max width in characters of the lines from\n\
319 the source file\n"));
320 fprintf (stream, _("\
321 --listing-cont-lines set the maximum number of continuation lines used\n\
322 for the output data column of the listing\n"));
324 md_show_usage (stream);
326 fputc ('\n', stream);
327 fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
330 /* Since it is easy to do here we interpret the special arg "-"
331 to mean "use stdin" and we set that argv[] pointing to "".
332 After we have munged argv[], the only things left are source file
333 name(s) and ""(s) denoting stdin. These file names are used
334 (perhaps more than once) later.
336 check for new machine-dep cmdline options in
337 md_parse_option definitions in config/tc-*.c. */
340 parse_args (pargc, pargv)
344 int old_argc, new_argc;
345 char **old_argv, **new_argv;
347 /* Starting the short option string with '-' is for programs that
348 expect options and other ARGV-elements in any order and that care about
349 the ordering of the two. We describe each non-option ARGV-element
350 as if it were the argument of an option with character code 1. */
353 extern CONST char *md_shortopts;
354 static const char std_shortopts[] = {
356 #ifndef WORKING_DOT_WORD
357 /* -K is not meaningful if .word is not being hacked. */
360 'L', 'M', 'R', 'W', 'Z', 'f', 'a', ':', ':', 'D', 'I', ':', 'o', ':',
362 /* -v takes an argument on VMS, so we don't make it a generic
367 /* New option for extending instruction set (see also --itbl below) */
371 struct option *longopts;
372 extern struct option md_longopts[];
373 extern size_t md_longopts_size;
374 static const struct option std_longopts[] = {
375 #define OPTION_HELP (OPTION_STD_BASE)
376 {"help", no_argument, NULL, OPTION_HELP},
377 {"keep-locals", no_argument, NULL, 'L'},
378 {"mri", no_argument, NULL, 'M'},
379 #define OPTION_NOCPP (OPTION_STD_BASE + 1)
380 {"nocpp", no_argument, NULL, OPTION_NOCPP},
381 #define OPTION_STATISTICS (OPTION_STD_BASE + 2)
382 {"statistics", no_argument, NULL, OPTION_STATISTICS},
383 #define OPTION_VERSION (OPTION_STD_BASE + 3)
384 {"version", no_argument, NULL, OPTION_VERSION},
385 #define OPTION_DUMPCONFIG (OPTION_STD_BASE + 4)
386 {"dump-config", no_argument, NULL, OPTION_DUMPCONFIG},
387 #define OPTION_VERBOSE (OPTION_STD_BASE + 5)
388 {"verbose", no_argument, NULL, OPTION_VERBOSE},
389 #define OPTION_EMULATION (OPTION_STD_BASE + 6)
390 {"emulation", required_argument, NULL, OPTION_EMULATION},
391 #define OPTION_DEFSYM (OPTION_STD_BASE + 7)
392 {"defsym", required_argument, NULL, OPTION_DEFSYM},
393 #define OPTION_INSTTBL (OPTION_STD_BASE + 8)
394 /* New option for extending instruction set (see also -t above).
395 The "-t file" or "--itbl file" option extends the basic set of
396 valid instructions by reading "file", a text file containing a
397 list of instruction formats. The additional opcodes and their
398 formats are added to the built-in set of instructions, and
399 mnemonics for new registers may also be defined. */
400 {"itbl", required_argument, NULL, OPTION_INSTTBL},
401 #define OPTION_LISTING_LHS_WIDTH (OPTION_STD_BASE + 9)
402 {"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH},
403 #define OPTION_LISTING_LHS_WIDTH2 (OPTION_STD_BASE + 10)
404 {"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2},
405 #define OPTION_LISTING_RHS_WIDTH (OPTION_STD_BASE + 11)
406 {"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH},
407 #define OPTION_LISTING_CONT_LINES (OPTION_STD_BASE + 12)
408 {"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES},
409 #define OPTION_DEPFILE (OPTION_STD_BASE + 13)
410 {"MD", required_argument, NULL, OPTION_DEPFILE},
411 #define OPTION_GSTABS (OPTION_STD_BASE + 14)
412 {"gstabs", no_argument, NULL, OPTION_GSTABS},
413 #define OPTION_STRIP_LOCAL_ABSOLUTE (OPTION_STD_BASE + 15)
414 {"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE},
415 #define OPTION_TRADITIONAL_FORMAT (OPTION_STD_BASE + 16)
416 {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
417 #define OPTION_GDWARF2 (OPTION_STD_BASE + 17)
418 {"gdwarf2", no_argument, NULL, OPTION_GDWARF2},
419 {"no-warn", no_argument, NULL, 'W'},
420 #define OPTION_WARN (OPTION_STD_BASE + 18)
421 {"warn", no_argument, NULL, OPTION_WARN},
422 #define OPTION_TARGET_HELP (OPTION_STD_BASE + 19)
423 {"target-help", no_argument, NULL, OPTION_TARGET_HELP},
424 #define OPTION_WARN_FATAL (OPTION_STD_BASE + 20)
425 {"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL}
426 /* When you add options here, check that they do not collide with
427 OPTION_MD_BASE. See as.h. */
430 /* Construct the option lists from the standard list and the target
431 dependent list. Include space for an extra NULL option and
432 always NULL terminate. */
433 shortopts = concat (std_shortopts, md_shortopts, (char *) NULL);
434 longopts = (struct option *) xmalloc (sizeof (std_longopts)
436 + sizeof (struct option));
437 memcpy (longopts, std_longopts, sizeof (std_longopts));
438 memcpy ((char *) longopts + sizeof (std_longopts),
439 md_longopts, md_longopts_size);
440 memset ((char *) longopts + sizeof (std_longopts) + md_longopts_size,
441 0, sizeof (struct option));
443 /* Make a local copy of the old argv. */
447 /* Initialize a new argv that contains no options. */
448 new_argv = (char **) xmalloc (sizeof (char *) * (old_argc + 1));
449 new_argv[0] = old_argv[0];
451 new_argv[new_argc] = NULL;
455 /* getopt_long_only is like getopt_long, but '-' as well as '--' can
456 indicate a long option. */
458 int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts,
467 /* md_parse_option should return 1 if it recognizes optc,
469 if (md_parse_option (optc, optarg) != 0)
471 /* `-v' isn't included in the general short_opts list, so check for
472 it explicity here before deciding we've gotten a bad argument. */
476 /* Telling getopt to treat -v's value as optional can result
477 in it picking up a following filename argument here. The
478 VMS code in md_parse_option can return 0 in that case,
479 but it has no way of pushing the filename argument back. */
480 if (optarg && *optarg)
481 new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL;
495 case 1: /* File name. */
496 if (!strcmp (optarg, "-"))
498 new_argv[new_argc++] = optarg;
499 new_argv[new_argc] = NULL;
502 case OPTION_TARGET_HELP:
503 md_show_usage (stdout);
513 case OPTION_STATISTICS:
514 flag_print_statistics = 1;
517 case OPTION_STRIP_LOCAL_ABSOLUTE:
518 flag_strip_local_absolute = 1;
521 case OPTION_TRADITIONAL_FORMAT:
522 flag_traditional_format = 1;
526 /* This output is intended to follow the GNU standards document. */
527 printf (_("GNU assembler %s\n"), VERSION);
528 printf (_("Copyright 2001 Free Software Foundation, Inc.\n"));
530 This program is free software; you may redistribute it under the terms of\n\
531 the GNU General Public License. This program has absolutely no warranty.\n"));
532 printf (_("This assembler was configured for a target of `%s'.\n"),
536 case OPTION_EMULATION:
537 #ifdef USE_EMULATIONS
538 if (strcmp (optarg, this_emulation->name))
539 as_fatal (_("multiple emulation names specified"));
541 as_fatal (_("emulations not handled in this configuration"));
545 case OPTION_DUMPCONFIG:
546 fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS);
547 fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL);
548 fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU);
549 #ifdef TARGET_OBJ_FORMAT
550 fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT);
553 fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT);
561 struct defsym_list *n;
563 for (s = optarg; *s != '\0' && *s != '='; s++)
566 as_fatal (_("bad defsym; format is --defsym name=value"));
569 i = bfd_scan_vma (s, (const char **) NULL, 0);
571 i = strtol (s, (char **) NULL, 0);
573 n = (struct defsym_list *) xmalloc (sizeof *n);
584 /* optarg is the name of the file containing the instruction
585 formats, opcodes, register names, etc. */
586 struct itbl_file_list *n;
590 as_warn (_("No file name following -t option\n"));
594 n = (struct itbl_file_list *) xmalloc (sizeof *n);
595 n->next = itbl_files;
599 /* Parse the file and add the new instructions to our internal
600 table. If multiple instruction tables are specified, the
601 information from this table gets appended onto the existing
603 itbl_files->name = xstrdup (optarg);
604 if (itbl_parse (itbl_files->name) != 0)
606 fprintf (stderr, _("Failed to read instruction table %s\n"),
614 start_dependencies (optarg);
618 debug_type = DEBUG_STABS;
622 debug_type = DEBUG_DWARF2;
626 flag_signed_overflow_ok = 1;
629 #ifndef WORKING_DOT_WORD
631 flag_warn_displacement = 1;
636 flag_keep_locals = 1;
639 case OPTION_LISTING_LHS_WIDTH:
640 listing_lhs_width = atoi (optarg);
641 if (listing_lhs_width_second < listing_lhs_width)
642 listing_lhs_width_second = listing_lhs_width;
644 case OPTION_LISTING_LHS_WIDTH2:
646 int tmp = atoi (optarg);
647 if (tmp > listing_lhs_width)
648 listing_lhs_width_second = tmp;
651 case OPTION_LISTING_RHS_WIDTH:
652 listing_rhs_width = atoi (optarg);
654 case OPTION_LISTING_CONT_LINES:
655 listing_lhs_cont_lines = atoi (optarg);
666 flag_readonly_data_in_text = 1;
670 flag_no_warnings = 1;
674 flag_no_warnings = 0;
675 flag_fatal_warnings = 0;
678 case OPTION_WARN_FATAL:
679 flag_no_warnings = 0;
680 flag_fatal_warnings = 1;
684 flag_always_generate_output = 1;
690 if (md_parse_option (optc, optarg) != 0)
698 listing |= LISTING_NOCOND;
701 listing |= LISTING_NODEBUG;
704 listing |= LISTING_HLL;
707 listing |= LISTING_LISTING;
710 listing |= LISTING_MACEXP;
713 listing |= LISTING_NOFORM;
716 listing |= LISTING_SYMBOLS;
719 listing_filename = xstrdup (optarg + 1);
720 optarg += strlen (listing_filename);
723 as_fatal (_("invalid listing option `%c'"), *optarg);
730 listing = LISTING_DEFAULT;
734 /* DEBUG is implemented: it debugs different
735 things from other people's assemblers. */
740 flag_no_comments = 1;
744 { /* Include file directory. */
745 char *temp = xstrdup (optarg);
746 add_include_dir (temp);
751 out_file_name = xstrdup (optarg);
758 /* -X means treat warnings as errors. */
770 static long start_time;
781 start_time = get_run_time ();
783 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
784 setlocale (LC_MESSAGES, "");
786 bindtextdomain (PACKAGE, LOCALEDIR);
787 textdomain (PACKAGE);
792 extern long _bfd_chunksize;
798 #ifdef HOST_SPECIAL_INIT
799 HOST_SPECIAL_INIT (argc, argv);
803 xmalloc_set_program_name (myname);
805 START_PROGRESS (myname, 0);
807 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
808 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
811 out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
816 bfd_set_error_program_name (myname);
819 #ifdef USE_EMULATIONS
820 select_emulation_mode (argc, argv);
827 parse_args (&argc, &argv);
829 input_scrub_begin ();
832 if (flag_print_statistics)
833 xatexit (dump_statistics);
838 macro_strip_at = flag_mri;
841 /* For compatibility with the AMD 29K family macro assembler
847 macro_init (macro_alternate, flag_mri, macro_strip_at, macro_expr);
852 output_file_create (out_file_name);
853 assert (stdoutput != 0);
856 #ifdef tc_init_after_args
857 tc_init_after_args ();
862 /* Now that we have fully initialized, and have created the output
863 file, define any symbols requested by --defsym command line
865 while (defsyms != NULL)
868 struct defsym_list *next;
870 sym = symbol_new (defsyms->name, absolute_section, defsyms->value,
872 symbol_table_insert (sym);
873 next = defsyms->next;
881 perform_an_assembly_pass (argc, argv);
883 cond_finish_check (-1);
889 /* If we've been collecting dwarf2 .debug_line info, either for
890 assembly debugging or on behalf of the compiler, emit it now. */
893 if (seen_at_least_1_file ()
894 && (flag_always_generate_output || had_errors () == 0))
899 #if defined (BFD_ASSEMBLER) || !defined (BFD)
900 /* This used to be done at the start of write_object_file in
901 write.c, but that caused problems when doing listings when
902 keep_it was zero. This could probably be moved above md_end, but
903 I didn't want to risk the change. */
908 write_object_file ();
911 listing_print (listing_filename);
914 #ifndef OBJ_VMS /* does its own file handling */
915 #ifndef BFD_ASSEMBLER
918 output_file_close (out_file_name);
921 if (flag_fatal_warnings && had_warnings () > 0 && had_errors () == 0)
922 as_bad (_("%d warnings, treating warnings as errors"), had_warnings ());
924 if (had_errors () > 0 && ! flag_always_generate_output)
928 unlink (out_file_name);
932 END_PROGRESS (myname);
934 /* Use xexit instead of return, because under VMS environments they
935 may not place the same interpretation on the value given. */
936 if (had_errors () > 0)
937 xexit (EXIT_FAILURE);
939 /* Only generate dependency file if assembler was successful. */
940 print_dependencies ();
942 xexit (EXIT_SUCCESS);
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);
968 #ifdef obj_print_statistics
969 obj_print_statistics (stderr);
973 /* Here to attempt 1 pass over each input file.
974 We scan argv[*] looking for filenames or exactly "" which is
975 shorthand for stdin. Any argv that is NULL is not a file-name.
976 We set need_pass_2 TRUE if, after this, we still have unresolved
977 expressions of the form (unknown value)+-(unknown value).
979 Note the un*x semantics: there is only 1 logical input file, but it
980 may be a catenation of many 'physical' input files. */
983 perform_an_assembly_pass (argc, argv)
994 #ifndef BFD_ASSEMBLER
998 for (i = SEG_E0; i < SEG_UNKNOWN; i++)
999 segment_info[i].fix_root = 0;
1001 /* Create the three fixed ones. */
1006 seg = subseg_new (".wtext", 0);
1008 seg = subseg_new (".text", 0);
1010 assert (seg == SEG_E0);
1011 seg = subseg_new (".data", 0);
1012 assert (seg == SEG_E1);
1013 seg = subseg_new (".bss", 0);
1014 assert (seg == SEG_E2);
1016 create_target_segments ();
1020 #else /* not MANY_SEGMENTS */
1021 text_fix_root = NULL;
1022 data_fix_root = NULL;
1023 bss_fix_root = NULL;
1024 #endif /* not MANY_SEGMENTS */
1025 #else /* BFD_ASSEMBLER */
1026 /* Create the standard sections, and those the assembler uses
1028 text_section = subseg_new (TEXT_SECTION_NAME, 0);
1029 data_section = subseg_new (DATA_SECTION_NAME, 0);
1030 bss_section = subseg_new (BSS_SECTION_NAME, 0);
1031 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
1032 to have relocs, otherwise we don't find out in time. */
1033 applicable = bfd_applicable_section_flags (stdoutput);
1034 bfd_set_section_flags (stdoutput, text_section,
1035 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1036 | SEC_CODE | SEC_READONLY));
1037 bfd_set_section_flags (stdoutput, data_section,
1038 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
1040 bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC);
1041 seg_info (bss_section)->bss = 1;
1042 subseg_new (BFD_ABS_SECTION_NAME, 0);
1043 subseg_new (BFD_UND_SECTION_NAME, 0);
1044 reg_section = subseg_new ("*GAS `reg' section*", 0);
1045 expr_section = subseg_new ("*GAS `expr' section*", 0);
1047 #endif /* BFD_ASSEMBLER */
1049 subseg_set (text_section, 0);
1051 /* This may add symbol table entries, which requires having an open BFD,
1052 and sections already created, in BFD_ASSEMBLER mode. */
1066 { /* Is it a file-name argument? */
1069 /* argv->"" if stdin desired, else->filename */
1070 read_a_source_file (*argv);
1072 argv++; /* completed that argv */
1075 read_a_source_file ("");
1078 /* The interface between the macro code and gas expression handling. */
1081 macro_expr (emsg, idx, in, val)
1092 hold = input_line_pointer;
1093 input_line_pointer = in->ptr + idx;
1095 idx = input_line_pointer - in->ptr;
1096 input_line_pointer = hold;
1098 if (ex.X_op != O_constant)
1099 as_bad ("%s", emsg);
1101 *val = (int) ex.X_add_number;