| 1 | /* as.c - GAS main program. |
| 2 | Copyright (C) 1987, 1990, 1991, 1992, 1994 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 2, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | GAS is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public 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 |
| 18 | the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 19 | |
| 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 | * |
| 27 | * bugs |
| 28 | * |
| 29 | * : initialisers |
| 30 | * Since no-one else says they will support them in future: I |
| 31 | * don't support them now. |
| 32 | * |
| 33 | */ |
| 34 | |
| 35 | #include "ansidecl.h" |
| 36 | #include "libiberty.h" |
| 37 | |
| 38 | #define COMMON |
| 39 | |
| 40 | #include "as.h" |
| 41 | #include "subsegs.h" |
| 42 | #include "output-file.h" |
| 43 | #include "sb.h" |
| 44 | #include "macro.h" |
| 45 | |
| 46 | static void perform_an_assembly_pass PARAMS ((int argc, char **argv)); |
| 47 | static int macro_expr PARAMS ((const char *, int, sb *, int *)); |
| 48 | |
| 49 | int listing; /* true if a listing is wanted */ |
| 50 | |
| 51 | static char *listing_filename = NULL; /* Name of listing file. */ |
| 52 | |
| 53 | /* Maximum level of macro nesting. */ |
| 54 | |
| 55 | int max_macro_nest = 100; |
| 56 | |
| 57 | char *myname; /* argv[0] */ |
| 58 | #ifdef BFD_ASSEMBLER |
| 59 | segT reg_section, expr_section; |
| 60 | segT text_section, data_section, bss_section; |
| 61 | #endif |
| 62 | |
| 63 | \f |
| 64 | void |
| 65 | print_version_id () |
| 66 | { |
| 67 | static int printed; |
| 68 | if (printed) |
| 69 | return; |
| 70 | printed = 1; |
| 71 | |
| 72 | fprintf (stderr, "GNU assembler version %s (%s)", GAS_VERSION, TARGET_ALIAS); |
| 73 | #ifdef BFD_ASSEMBLER |
| 74 | fprintf (stderr, ", using BFD version %s", BFD_VERSION); |
| 75 | #endif |
| 76 | fprintf (stderr, "\n"); |
| 77 | } |
| 78 | |
| 79 | void |
| 80 | show_usage (stream) |
| 81 | FILE *stream; |
| 82 | { |
| 83 | fprintf (stream, "Usage: %s [option...] [asmfile...]\n", myname); |
| 84 | |
| 85 | fprintf (stream, "\ |
| 86 | Options:\n\ |
| 87 | -a[sub-option...] turn on listings\n\ |
| 88 | Sub-options [default hls]:\n\ |
| 89 | d omit debugging directives\n\ |
| 90 | h include high-level source\n\ |
| 91 | l include assembly\n\ |
| 92 | n omit forms processing\n\ |
| 93 | s include symbols\n\ |
| 94 | =file set listing file name (must be last sub-option)\n"); |
| 95 | fprintf (stream, "\ |
| 96 | -D produce assembler debugging messages\n\ |
| 97 | -f skip whitespace and comment preprocessing\n\ |
| 98 | --help show this message and exit\n\ |
| 99 | -I DIR add DIR to search list for .include directives\n\ |
| 100 | -J don't warn about signed overflow\n\ |
| 101 | -K warn when differences altered for long displacements\n\ |
| 102 | -L keep local symbols (starting with `L')\n"); |
| 103 | fprintf (stream, "\ |
| 104 | -M,--mri assemble in MRI compatibility mode\n\ |
| 105 | -nocpp ignored\n\ |
| 106 | -o OBJFILE name the object-file output OBJFILE (default a.out)\n\ |
| 107 | -R fold data section into text section\n\ |
| 108 | --statistics print maximum bytes and total seconds used\n\ |
| 109 | --version print assembler version number and exit\n\ |
| 110 | -W suppress warnings\n\ |
| 111 | -w ignored\n\ |
| 112 | -X ignored\n\ |
| 113 | -Z generate object file even after errors\n"); |
| 114 | |
| 115 | md_show_usage (stream); |
| 116 | } |
| 117 | |
| 118 | #ifdef USE_EMULATIONS |
| 119 | #define EMULATION_ENVIRON "AS_EMULATION" |
| 120 | |
| 121 | extern struct emulation mipsbelf, mipslelf, mipself; |
| 122 | extern struct emulation mipsbecoff, mipslecoff, mipsecoff; |
| 123 | |
| 124 | static const char *emulation_name; |
| 125 | static struct emulation *const emulations[] = { EMULATIONS }; |
| 126 | static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]); |
| 127 | |
| 128 | static void |
| 129 | select_emulation_mode (argc, argv) |
| 130 | int argc; |
| 131 | char **argv; |
| 132 | { |
| 133 | int i; |
| 134 | char *p, *em = 0; |
| 135 | |
| 136 | for (i = 1; i < argc; i++) |
| 137 | if (!strncmp ("--em", argv[i], 4)) |
| 138 | break; |
| 139 | |
| 140 | if (i == argc) |
| 141 | goto do_default; |
| 142 | |
| 143 | p = strchr (argv[i], '='); |
| 144 | if (p) |
| 145 | p++; |
| 146 | else |
| 147 | p = argv[i+1]; |
| 148 | |
| 149 | if (!p || !*p) |
| 150 | as_fatal ("missing emulation mode name"); |
| 151 | em = p; |
| 152 | |
| 153 | do_default: |
| 154 | if (em == 0) |
| 155 | em = getenv (EMULATION_ENVIRON); |
| 156 | if (em == 0) |
| 157 | em = DEFAULT_EMULATION; |
| 158 | |
| 159 | if (em) |
| 160 | { |
| 161 | for (i = 0; i < n_emulations; i++) |
| 162 | if (!strcmp (emulations[i]->name, em)) |
| 163 | break; |
| 164 | if (i == n_emulations) |
| 165 | as_fatal ("unrecognized emulation name `%s'", em); |
| 166 | this_emulation = emulations[i]; |
| 167 | } |
| 168 | else |
| 169 | this_emulation = emulations[0]; |
| 170 | |
| 171 | this_emulation->init (); |
| 172 | } |
| 173 | |
| 174 | const char * |
| 175 | default_emul_bfd_name () |
| 176 | { |
| 177 | abort (); |
| 178 | } |
| 179 | |
| 180 | void |
| 181 | common_emul_init () |
| 182 | { |
| 183 | this_format = this_emulation->format; |
| 184 | |
| 185 | if (this_emulation->leading_underscore == 2) |
| 186 | this_emulation->leading_underscore = this_format->dfl_leading_underscore; |
| 187 | |
| 188 | if (this_emulation->default_endian != 2) |
| 189 | target_big_endian = this_emulation->default_endian; |
| 190 | |
| 191 | if (this_emulation->fake_label_name == 0) |
| 192 | { |
| 193 | if (this_emulation->leading_underscore) |
| 194 | this_emulation->fake_label_name = "L0\001"; |
| 195 | else |
| 196 | /* What other parameters should we test? */ |
| 197 | this_emulation->fake_label_name = ".L0\001"; |
| 198 | } |
| 199 | } |
| 200 | #endif |
| 201 | |
| 202 | /* |
| 203 | * Since it is easy to do here we interpret the special arg "-" |
| 204 | * to mean "use stdin" and we set that argv[] pointing to "". |
| 205 | * After we have munged argv[], the only things left are source file |
| 206 | * name(s) and ""(s) denoting stdin. These file names are used |
| 207 | * (perhaps more than once) later. |
| 208 | * |
| 209 | * check for new machine-dep cmdline options in |
| 210 | * md_parse_option definitions in config/tc-*.c |
| 211 | */ |
| 212 | |
| 213 | void |
| 214 | parse_args (pargc, pargv) |
| 215 | int *pargc; |
| 216 | char ***pargv; |
| 217 | { |
| 218 | int old_argc, new_argc; |
| 219 | char **old_argv, **new_argv; |
| 220 | |
| 221 | /* Starting the short option string with '-' is for programs that |
| 222 | expect options and other ARGV-elements in any order and that care about |
| 223 | the ordering of the two. We describe each non-option ARGV-element |
| 224 | as if it were the argument of an option with character code 1. */ |
| 225 | |
| 226 | char *shortopts; |
| 227 | extern CONST char *md_shortopts; |
| 228 | static const char std_shortopts[] = |
| 229 | { |
| 230 | '-', 'J', |
| 231 | #ifndef WORKING_DOT_WORD |
| 232 | /* -K is not meaningful if .word is not being hacked. */ |
| 233 | 'K', |
| 234 | #endif |
| 235 | 'L', 'M', 'R', 'W', 'Z', 'f', 'a', ':', ':', 'D', 'I', ':', 'o', ':', |
| 236 | #ifndef VMS |
| 237 | /* -v takes an argument on VMS, so we don't make it a generic |
| 238 | option. */ |
| 239 | 'v', |
| 240 | #endif |
| 241 | 'w', 'X', |
| 242 | '\0' |
| 243 | }; |
| 244 | struct option *longopts; |
| 245 | extern struct option md_longopts[]; |
| 246 | extern size_t md_longopts_size; |
| 247 | static const struct option std_longopts[] = { |
| 248 | #define OPTION_HELP (OPTION_STD_BASE) |
| 249 | {"help", no_argument, NULL, OPTION_HELP}, |
| 250 | {"mri", no_argument, NULL, 'M'}, |
| 251 | #define OPTION_NOCPP (OPTION_STD_BASE + 1) |
| 252 | {"nocpp", no_argument, NULL, OPTION_NOCPP}, |
| 253 | #define OPTION_STATISTICS (OPTION_STD_BASE + 2) |
| 254 | {"statistics", no_argument, NULL, OPTION_STATISTICS}, |
| 255 | #define OPTION_VERSION (OPTION_STD_BASE + 3) |
| 256 | {"version", no_argument, NULL, OPTION_VERSION}, |
| 257 | #define OPTION_DUMPCONFIG (OPTION_STD_BASE + 4) |
| 258 | {"dump-config", no_argument, NULL, OPTION_DUMPCONFIG}, |
| 259 | #define OPTION_VERBOSE (OPTION_STD_BASE + 5) |
| 260 | {"verbose", no_argument, NULL, OPTION_VERBOSE}, |
| 261 | #define OPTION_EMULATION (OPTION_STD_BASE + 6) |
| 262 | {"emulation", required_argument, NULL, OPTION_EMULATION}, |
| 263 | }; |
| 264 | |
| 265 | /* Construct the option lists from the standard list and the |
| 266 | target dependent list. */ |
| 267 | shortopts = concat (std_shortopts, md_shortopts, (char *) NULL); |
| 268 | longopts = (struct option *) xmalloc (sizeof (std_longopts) + md_longopts_size); |
| 269 | memcpy (longopts, std_longopts, sizeof (std_longopts)); |
| 270 | memcpy ((char *) longopts + sizeof (std_longopts), |
| 271 | md_longopts, md_longopts_size); |
| 272 | |
| 273 | /* Make a local copy of the old argv. */ |
| 274 | old_argc = *pargc; |
| 275 | old_argv = *pargv; |
| 276 | |
| 277 | /* Initialize a new argv that contains no options. */ |
| 278 | new_argv = (char **) xmalloc (sizeof (char *) * (old_argc + 1)); |
| 279 | new_argv[0] = old_argv[0]; |
| 280 | new_argc = 1; |
| 281 | new_argv[new_argc] = NULL; |
| 282 | |
| 283 | while (1) |
| 284 | { |
| 285 | /* getopt_long_only is like getopt_long, but '-' as well as '--' can |
| 286 | indicate a long option. */ |
| 287 | int longind; |
| 288 | int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts, |
| 289 | &longind); |
| 290 | |
| 291 | if (optc == -1) |
| 292 | break; |
| 293 | |
| 294 | switch (optc) |
| 295 | { |
| 296 | default: |
| 297 | /* md_parse_option should return 1 if it recognizes optc, |
| 298 | 0 if not. */ |
| 299 | if (md_parse_option (optc, optarg) != 0) |
| 300 | break; |
| 301 | /* `-v' isn't included in the general short_opts list, so check for |
| 302 | it explicity here before deciding we've gotten a bad argument. */ |
| 303 | if (optc == 'v') |
| 304 | { |
| 305 | #ifdef VMS |
| 306 | /* Telling getopt to treat -v's value as optional can result |
| 307 | in it picking up a following filename argument here. The |
| 308 | VMS code in md_parse_option can return 0 in that case, |
| 309 | but it has no way of pushing the filename argument back. */ |
| 310 | if (optarg && *optarg) |
| 311 | new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL; |
| 312 | else |
| 313 | #else |
| 314 | case 'v': |
| 315 | #endif |
| 316 | case OPTION_VERBOSE: |
| 317 | print_version_id (); |
| 318 | break; |
| 319 | } |
| 320 | /*FALLTHRU*/ |
| 321 | |
| 322 | case '?': |
| 323 | exit (EXIT_FAILURE); |
| 324 | |
| 325 | case 1: /* File name. */ |
| 326 | if (!strcmp (optarg, "-")) |
| 327 | optarg = ""; |
| 328 | new_argv[new_argc++] = optarg; |
| 329 | new_argv[new_argc] = NULL; |
| 330 | break; |
| 331 | |
| 332 | case OPTION_HELP: |
| 333 | show_usage (stdout); |
| 334 | exit (EXIT_SUCCESS); |
| 335 | |
| 336 | case OPTION_NOCPP: |
| 337 | break; |
| 338 | |
| 339 | case OPTION_STATISTICS: |
| 340 | flag_print_statistics = 1; |
| 341 | break; |
| 342 | |
| 343 | case OPTION_VERSION: |
| 344 | print_version_id (); |
| 345 | exit (EXIT_SUCCESS); |
| 346 | |
| 347 | case OPTION_EMULATION: |
| 348 | #ifdef USE_EMULATIONS |
| 349 | if (strcmp (optarg, this_emulation->name)) |
| 350 | as_fatal ("multiple emulation names specified"); |
| 351 | #else |
| 352 | as_fatal ("emulations not handled in this configuration"); |
| 353 | #endif |
| 354 | break; |
| 355 | |
| 356 | case OPTION_DUMPCONFIG: |
| 357 | fprintf (stderr, "alias = %s\n", TARGET_ALIAS); |
| 358 | fprintf (stderr, "canonical = %s\n", TARGET_CANONICAL); |
| 359 | fprintf (stderr, "cpu-type = %s\n", TARGET_CPU); |
| 360 | #ifdef TARGET_OBJ_FORMAT |
| 361 | fprintf (stderr, "format = %s\n", TARGET_OBJ_FORMAT); |
| 362 | #endif |
| 363 | #ifdef TARGET_FORMAT |
| 364 | fprintf (stderr, "bfd-target = %s\n", TARGET_FORMAT); |
| 365 | #endif |
| 366 | exit (EXIT_SUCCESS); |
| 367 | |
| 368 | case 'J': |
| 369 | flag_signed_overflow_ok = 1; |
| 370 | break; |
| 371 | |
| 372 | #ifndef WORKING_DOT_WORD |
| 373 | case 'K': |
| 374 | flag_warn_displacement = 1; |
| 375 | break; |
| 376 | #endif |
| 377 | |
| 378 | case 'L': |
| 379 | flag_keep_locals = 1; |
| 380 | break; |
| 381 | |
| 382 | case 'M': |
| 383 | flag_mri = 1; |
| 384 | break; |
| 385 | |
| 386 | case 'R': |
| 387 | flag_readonly_data_in_text = 1; |
| 388 | break; |
| 389 | |
| 390 | case 'W': |
| 391 | flag_no_warnings = 1; |
| 392 | break; |
| 393 | |
| 394 | case 'Z': |
| 395 | flag_always_generate_output = 1; |
| 396 | break; |
| 397 | |
| 398 | case 'a': |
| 399 | if (optarg) |
| 400 | { |
| 401 | while (*optarg) |
| 402 | { |
| 403 | switch (*optarg) |
| 404 | { |
| 405 | case 'd': |
| 406 | listing |= LISTING_NODEBUG; |
| 407 | break; |
| 408 | case 'h': |
| 409 | listing |= LISTING_HLL; |
| 410 | break; |
| 411 | case 'l': |
| 412 | listing |= LISTING_LISTING; |
| 413 | break; |
| 414 | case 'n': |
| 415 | listing |= LISTING_NOFORM; |
| 416 | break; |
| 417 | case 's': |
| 418 | listing |= LISTING_SYMBOLS; |
| 419 | break; |
| 420 | case '=': |
| 421 | listing_filename = strdup (optarg + 1); |
| 422 | if (listing_filename == NULL) |
| 423 | as_fatal ("virtual memory exhausted"); |
| 424 | optarg += strlen (listing_filename); |
| 425 | break; |
| 426 | default: |
| 427 | as_fatal ("invalid listing option `%c'", *optarg); |
| 428 | break; |
| 429 | } |
| 430 | optarg++; |
| 431 | } |
| 432 | } |
| 433 | if (!listing) |
| 434 | listing = LISTING_DEFAULT; |
| 435 | break; |
| 436 | |
| 437 | case 'D': |
| 438 | /* DEBUG is implemented: it debugs different */ |
| 439 | /* things from other people's assemblers. */ |
| 440 | flag_debug = 1; |
| 441 | break; |
| 442 | |
| 443 | case 'f': |
| 444 | flag_no_comments = 1; |
| 445 | break; |
| 446 | |
| 447 | case 'I': |
| 448 | { /* Include file directory */ |
| 449 | char *temp = strdup (optarg); |
| 450 | if (!temp) |
| 451 | as_fatal ("virtual memory exhausted"); |
| 452 | add_include_dir (temp); |
| 453 | break; |
| 454 | } |
| 455 | |
| 456 | case 'o': |
| 457 | out_file_name = strdup (optarg); |
| 458 | if (!out_file_name) |
| 459 | as_fatal ("virtual memory exhausted"); |
| 460 | break; |
| 461 | |
| 462 | case 'w': |
| 463 | break; |
| 464 | |
| 465 | case 'X': |
| 466 | /* -X means treat warnings as errors */ |
| 467 | break; |
| 468 | } |
| 469 | } |
| 470 | |
| 471 | free (shortopts); |
| 472 | free (longopts); |
| 473 | |
| 474 | *pargc = new_argc; |
| 475 | *pargv = new_argv; |
| 476 | } |
| 477 | |
| 478 | int |
| 479 | main (argc, argv) |
| 480 | int argc; |
| 481 | char **argv; |
| 482 | { |
| 483 | int keep_it; |
| 484 | long start_time = get_run_time (); |
| 485 | |
| 486 | #ifdef HOST_SPECIAL_INIT |
| 487 | HOST_SPECIAL_INIT (argc, argv); |
| 488 | #endif |
| 489 | |
| 490 | myname = argv[0]; |
| 491 | xmalloc_set_program_name (myname); |
| 492 | |
| 493 | START_PROGRESS (myname, 0); |
| 494 | |
| 495 | #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME |
| 496 | #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out" |
| 497 | #endif |
| 498 | |
| 499 | out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME; |
| 500 | |
| 501 | hex_init (); |
| 502 | #ifdef BFD_ASSEMBLER |
| 503 | bfd_init (); |
| 504 | #endif |
| 505 | |
| 506 | #ifdef USE_EMULATIONS |
| 507 | select_emulation_mode (argc, argv); |
| 508 | #endif |
| 509 | |
| 510 | PROGRESS (1); |
| 511 | symbol_begin (); |
| 512 | frag_init (); |
| 513 | subsegs_begin (); |
| 514 | read_begin (); |
| 515 | parse_args (&argc, &argv); |
| 516 | input_scrub_begin (); |
| 517 | expr_begin (); |
| 518 | macro_init (0, flag_mri, macro_expr); |
| 519 | |
| 520 | PROGRESS (1); |
| 521 | |
| 522 | #ifdef BFD_ASSEMBLER |
| 523 | output_file_create (out_file_name); |
| 524 | assert (stdoutput != 0); |
| 525 | #endif |
| 526 | |
| 527 | #ifdef tc_init_after_args |
| 528 | tc_init_after_args (); |
| 529 | #endif |
| 530 | |
| 531 | PROGRESS (1); |
| 532 | |
| 533 | perform_an_assembly_pass (argc, argv); /* Assemble it. */ |
| 534 | #ifdef TC_I960 |
| 535 | brtab_emit (); |
| 536 | #endif |
| 537 | /* start-sanitize-rce */ |
| 538 | #ifdef TC_RCE |
| 539 | dump_literals(0); |
| 540 | #endif |
| 541 | /* end-sanitize-rce */ |
| 542 | |
| 543 | if (seen_at_least_1_file () |
| 544 | && !((had_warnings () && flag_always_generate_output) |
| 545 | || had_errors () > 0)) |
| 546 | keep_it = 1; |
| 547 | else |
| 548 | keep_it = 0; |
| 549 | |
| 550 | if (keep_it) |
| 551 | write_object_file (); |
| 552 | |
| 553 | #ifndef NO_LISTING |
| 554 | listing_print (listing_filename); |
| 555 | #endif |
| 556 | |
| 557 | #ifndef OBJ_VMS /* does its own file handling */ |
| 558 | #ifndef BFD_ASSEMBLER |
| 559 | if (keep_it) |
| 560 | #endif |
| 561 | output_file_close (out_file_name); |
| 562 | #endif |
| 563 | |
| 564 | if (!keep_it) |
| 565 | unlink (out_file_name); |
| 566 | |
| 567 | input_scrub_end (); |
| 568 | #ifdef md_end |
| 569 | md_end (); |
| 570 | #endif |
| 571 | |
| 572 | END_PROGRESS (myname); |
| 573 | |
| 574 | if (flag_print_statistics) |
| 575 | { |
| 576 | extern char **environ; |
| 577 | #ifdef HAVE_SBRK |
| 578 | char *lim = (char *) sbrk (0); |
| 579 | #endif |
| 580 | long run_time = get_run_time () - start_time; |
| 581 | |
| 582 | fprintf (stderr, "%s: total time in assembly: %ld.%06ld\n", |
| 583 | myname, run_time / 1000000, run_time % 1000000); |
| 584 | #ifdef HAVE_SBRK |
| 585 | fprintf (stderr, "%s: data size %ld\n", |
| 586 | myname, (long) (lim - (char *) &environ)); |
| 587 | #endif |
| 588 | } |
| 589 | |
| 590 | /* Use exit instead of return, because under VMS environments they |
| 591 | may not place the same interpretation on the value given. */ |
| 592 | if ((had_warnings () && flag_always_generate_output) |
| 593 | || had_errors () > 0) |
| 594 | exit (EXIT_FAILURE); |
| 595 | exit (EXIT_SUCCESS); |
| 596 | } |
| 597 | \f |
| 598 | |
| 599 | /* perform_an_assembly_pass() |
| 600 | * |
| 601 | * Here to attempt 1 pass over each input file. |
| 602 | * We scan argv[*] looking for filenames or exactly "" which is |
| 603 | * shorthand for stdin. Any argv that is NULL is not a file-name. |
| 604 | * We set need_pass_2 TRUE if, after this, we still have unresolved |
| 605 | * expressions of the form (unknown value)+-(unknown value). |
| 606 | * |
| 607 | * Note the un*x semantics: there is only 1 logical input file, but it |
| 608 | * may be a catenation of many 'physical' input files. |
| 609 | */ |
| 610 | static void |
| 611 | perform_an_assembly_pass (argc, argv) |
| 612 | int argc; |
| 613 | char **argv; |
| 614 | { |
| 615 | int saw_a_file = 0; |
| 616 | #ifdef BFD_ASSEMBLER |
| 617 | flagword applicable; |
| 618 | #endif |
| 619 | |
| 620 | need_pass_2 = 0; |
| 621 | |
| 622 | #ifndef BFD_ASSEMBLER |
| 623 | #ifdef MANY_SEGMENTS |
| 624 | { |
| 625 | unsigned int i; |
| 626 | for (i = SEG_E0; i < SEG_UNKNOWN; i++) |
| 627 | segment_info[i].fix_root = 0; |
| 628 | } |
| 629 | /* Create the three fixed ones */ |
| 630 | { |
| 631 | segT seg; |
| 632 | |
| 633 | #ifdef TE_APOLLO |
| 634 | seg = subseg_new (".wtext", 0); |
| 635 | #else |
| 636 | seg = subseg_new (".text", 0); |
| 637 | #endif |
| 638 | assert (seg == SEG_E0); |
| 639 | seg = subseg_new (".data", 0); |
| 640 | assert (seg == SEG_E1); |
| 641 | seg = subseg_new (".bss", 0); |
| 642 | assert (seg == SEG_E2); |
| 643 | #ifdef TE_APOLLO |
| 644 | create_target_segments (); |
| 645 | #endif |
| 646 | } |
| 647 | |
| 648 | #else /* not MANY_SEGMENTS */ |
| 649 | text_fix_root = NULL; |
| 650 | data_fix_root = NULL; |
| 651 | bss_fix_root = NULL; |
| 652 | #endif /* not MANY_SEGMENTS */ |
| 653 | #else /* BFD_ASSEMBLER */ |
| 654 | /* Create the standard sections, and those the assembler uses |
| 655 | internally. */ |
| 656 | text_section = subseg_new (".text", 0); |
| 657 | data_section = subseg_new (".data", 0); |
| 658 | bss_section = subseg_new (".bss", 0); |
| 659 | /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed |
| 660 | to have relocs, otherwise we don't find out in time. */ |
| 661 | applicable = bfd_applicable_section_flags (stdoutput); |
| 662 | bfd_set_section_flags (stdoutput, text_section, |
| 663 | applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC |
| 664 | | SEC_CODE | SEC_READONLY)); |
| 665 | /* @@ FIXME -- SEC_CODE seems to mean code only, rather than code possibly.*/ |
| 666 | bfd_set_section_flags (stdoutput, data_section, |
| 667 | applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)); |
| 668 | bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC); |
| 669 | seg_info (bss_section)->bss = 1; |
| 670 | subseg_new (BFD_ABS_SECTION_NAME, 0); |
| 671 | subseg_new (BFD_UND_SECTION_NAME, 0); |
| 672 | reg_section = subseg_new ("*GAS `reg' section*", 0); |
| 673 | expr_section = subseg_new ("*GAS `expr' section*", 0); |
| 674 | |
| 675 | #endif /* BFD_ASSEMBLER */ |
| 676 | |
| 677 | subseg_set (text_section, 0); |
| 678 | |
| 679 | /* This may add symbol table entries, which requires having an open BFD, |
| 680 | and sections already created, in BFD_ASSEMBLER mode. */ |
| 681 | md_begin (); |
| 682 | |
| 683 | argv++; /* skip argv[0] */ |
| 684 | argc--; /* skip argv[0] */ |
| 685 | while (argc--) |
| 686 | { |
| 687 | if (*argv) |
| 688 | { /* Is it a file-name argument? */ |
| 689 | PROGRESS (1); |
| 690 | saw_a_file++; |
| 691 | /* argv->"" if stdin desired, else->filename */ |
| 692 | read_a_source_file (*argv); |
| 693 | } |
| 694 | argv++; /* completed that argv */ |
| 695 | } |
| 696 | if (!saw_a_file) |
| 697 | read_a_source_file (""); |
| 698 | } /* perform_an_assembly_pass() */ |
| 699 | |
| 700 | /* The interface between the macro code and gas expression handling. */ |
| 701 | |
| 702 | static int |
| 703 | macro_expr (emsg, idx, in, val) |
| 704 | const char *emsg; |
| 705 | int idx; |
| 706 | sb *in; |
| 707 | int *val; |
| 708 | { |
| 709 | char *hold; |
| 710 | expressionS ex; |
| 711 | |
| 712 | sb_terminate (in); |
| 713 | |
| 714 | hold = input_line_pointer; |
| 715 | input_line_pointer = in->ptr + idx; |
| 716 | expression (&ex); |
| 717 | idx = input_line_pointer - in->ptr; |
| 718 | input_line_pointer = hold; |
| 719 | |
| 720 | if (ex.X_op != O_constant) |
| 721 | as_bad ("%s", emsg); |
| 722 | |
| 723 | *val = (int) ex.X_add_number; |
| 724 | |
| 725 | return idx; |
| 726 | } |
| 727 | |
| 728 | /* end of as.c */ |