| 1 | /* as.c - GAS main program. |
| 2 | Copyright (C) 1987, 90, 91, 92, 93, 94, 95, 96, 1997 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GAS, the GNU Assembler. |
| 6 | |
| 7 | GAS is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GAS is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GAS; see the file COPYING. If not, write to the Free |
| 19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
| 20 | 02111-1307, USA. */ |
| 21 | |
| 22 | /* |
| 23 | * Main program for AS; a 32-bit assembler of GNU. |
| 24 | * Understands command arguments. |
| 25 | * Has a few routines that don't fit in other modules because they |
| 26 | * are shared. |
| 27 | * |
| 28 | * |
| 29 | * bugs |
| 30 | * |
| 31 | * : initialisers |
| 32 | * Since no-one else says they will support them in future: I |
| 33 | * don't support them now. |
| 34 | * |
| 35 | */ |
| 36 | |
| 37 | #include "ansidecl.h" |
| 38 | |
| 39 | #define COMMON |
| 40 | |
| 41 | #include "as.h" |
| 42 | #include "subsegs.h" |
| 43 | #include "output-file.h" |
| 44 | #include "sb.h" |
| 45 | #include "macro.h" |
| 46 | #ifndef HAVE_ITBL_CPU |
| 47 | #define itbl_parse(itbl_file) 1 |
| 48 | #define itbl_init() |
| 49 | #endif |
| 50 | |
| 51 | #ifdef HAVE_SBRK |
| 52 | #ifdef NEED_DECLARATION_SBRK |
| 53 | extern PTR sbrk (); |
| 54 | #endif |
| 55 | #endif |
| 56 | |
| 57 | static void show_usage PARAMS ((FILE *)); |
| 58 | static void parse_args PARAMS ((int *, char ***)); |
| 59 | static void dump_statistics PARAMS ((void)); |
| 60 | static void perform_an_assembly_pass PARAMS ((int argc, char **argv)); |
| 61 | static int macro_expr PARAMS ((const char *, int, sb *, int *)); |
| 62 | |
| 63 | int listing; /* true if a listing is wanted */ |
| 64 | |
| 65 | static char *listing_filename = NULL; /* Name of listing file. */ |
| 66 | |
| 67 | /* Type of debugging to generate. */ |
| 68 | |
| 69 | enum debug_info_type debug_type = DEBUG_NONE; |
| 70 | |
| 71 | /* Maximum level of macro nesting. */ |
| 72 | |
| 73 | int max_macro_nest = 100; |
| 74 | |
| 75 | char *myname; /* argv[0] */ |
| 76 | #ifdef BFD_ASSEMBLER |
| 77 | segT reg_section, expr_section; |
| 78 | segT text_section, data_section, bss_section; |
| 79 | #endif |
| 80 | |
| 81 | int chunksize = 5000; |
| 82 | |
| 83 | /* To monitor memory allocation more effectively, make this non-zero. |
| 84 | Then the chunk sizes for gas and bfd will be reduced. */ |
| 85 | int debug_memory = 0; |
| 86 | |
| 87 | /* We build a list of defsyms as we read the options, and then define |
| 88 | them after we have initialized everything. */ |
| 89 | |
| 90 | struct defsym_list |
| 91 | { |
| 92 | struct defsym_list *next; |
| 93 | char *name; |
| 94 | valueT value; |
| 95 | }; |
| 96 | |
| 97 | static struct defsym_list *defsyms; |
| 98 | |
| 99 | /* Keep a record of the itbl files we read in. */ |
| 100 | |
| 101 | struct itbl_file_list |
| 102 | { |
| 103 | struct itbl_file_list *next; |
| 104 | char *name; |
| 105 | }; |
| 106 | |
| 107 | static struct itbl_file_list *itbl_files; |
| 108 | \f |
| 109 | void |
| 110 | print_version_id () |
| 111 | { |
| 112 | static int printed; |
| 113 | if (printed) |
| 114 | return; |
| 115 | printed = 1; |
| 116 | |
| 117 | fprintf (stderr, "GNU assembler version %s (%s)", VERSION, TARGET_ALIAS); |
| 118 | #ifdef BFD_ASSEMBLER |
| 119 | fprintf (stderr, ", using BFD version %s", BFD_VERSION); |
| 120 | #endif |
| 121 | fprintf (stderr, "\n"); |
| 122 | } |
| 123 | |
| 124 | static void |
| 125 | show_usage (stream) |
| 126 | FILE *stream; |
| 127 | { |
| 128 | fprintf (stream, "Usage: %s [option...] [asmfile...]\n", myname); |
| 129 | |
| 130 | fprintf (stream, "\ |
| 131 | Options:\n\ |
| 132 | -a[sub-option...] turn on listings\n\ |
| 133 | Sub-options [default hls]:\n\ |
| 134 | c omit false conditionals\n\ |
| 135 | d omit debugging directives\n\ |
| 136 | h include high-level source\n\ |
| 137 | l include assembly\n\ |
| 138 | n omit forms processing\n\ |
| 139 | s include symbols\n\ |
| 140 | =file set listing file name (must be last sub-option)\n"); |
| 141 | fprintf (stream, "\ |
| 142 | -D produce assembler debugging messages\n\ |
| 143 | --defsym SYM=VAL define symbol SYM to given value\n\ |
| 144 | -f skip whitespace and comment preprocessing\n\ |
| 145 | --gstabs generate stabs debugging information\n\ |
| 146 | --help show this message and exit\n\ |
| 147 | -I DIR add DIR to search list for .include directives\n\ |
| 148 | -J don't warn about signed overflow\n\ |
| 149 | -K warn when differences altered for long displacements\n\ |
| 150 | -L keep local symbols (starting with `L')\n"); |
| 151 | fprintf (stream, "\ |
| 152 | -M,--mri assemble in MRI compatibility mode\n\ |
| 153 | --MD FILE write dependency information in FILE (default none)\n\ |
| 154 | -nocpp ignored\n\ |
| 155 | -o OBJFILE name the object-file output OBJFILE (default a.out)\n\ |
| 156 | -R fold data section into text section\n\ |
| 157 | --statistics print various measured statistics from execution\n\ |
| 158 | --version print assembler version number and exit\n\ |
| 159 | -W suppress warnings\n\ |
| 160 | --itbl INSTTBL extend instruction set to include instructions\n\ |
| 161 | matching the specifications defined in file INSTTBL\n\ |
| 162 | -w ignored\n\ |
| 163 | -X ignored\n\ |
| 164 | -Z generate object file even after errors\n"); |
| 165 | |
| 166 | md_show_usage (stream); |
| 167 | |
| 168 | fprintf (stream, "\nReport bugs to bug-gnu-utils@prep.ai.mit.edu\n"); |
| 169 | } |
| 170 | |
| 171 | #ifdef USE_EMULATIONS |
| 172 | #define EMULATION_ENVIRON "AS_EMULATION" |
| 173 | |
| 174 | extern struct emulation mipsbelf, mipslelf, mipself; |
| 175 | extern struct emulation mipsbecoff, mipslecoff, mipsecoff; |
| 176 | extern struct emulation i386coff, i386elf; |
| 177 | |
| 178 | static struct emulation *const emulations[] = { EMULATIONS }; |
| 179 | static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]); |
| 180 | |
| 181 | static void select_emulation_mode PARAMS ((int, char **)); |
| 182 | |
| 183 | static void |
| 184 | select_emulation_mode (argc, argv) |
| 185 | int argc; |
| 186 | char **argv; |
| 187 | { |
| 188 | int i; |
| 189 | char *p, *em = 0; |
| 190 | |
| 191 | for (i = 1; i < argc; i++) |
| 192 | if (!strncmp ("--em", argv[i], 4)) |
| 193 | break; |
| 194 | |
| 195 | if (i == argc) |
| 196 | goto do_default; |
| 197 | |
| 198 | p = strchr (argv[i], '='); |
| 199 | if (p) |
| 200 | p++; |
| 201 | else |
| 202 | p = argv[i+1]; |
| 203 | |
| 204 | if (!p || !*p) |
| 205 | as_fatal ("missing emulation mode name"); |
| 206 | em = p; |
| 207 | |
| 208 | do_default: |
| 209 | if (em == 0) |
| 210 | em = getenv (EMULATION_ENVIRON); |
| 211 | if (em == 0) |
| 212 | em = DEFAULT_EMULATION; |
| 213 | |
| 214 | if (em) |
| 215 | { |
| 216 | for (i = 0; i < n_emulations; i++) |
| 217 | if (!strcmp (emulations[i]->name, em)) |
| 218 | break; |
| 219 | if (i == n_emulations) |
| 220 | as_fatal ("unrecognized emulation name `%s'", em); |
| 221 | this_emulation = emulations[i]; |
| 222 | } |
| 223 | else |
| 224 | this_emulation = emulations[0]; |
| 225 | |
| 226 | this_emulation->init (); |
| 227 | } |
| 228 | |
| 229 | const char * |
| 230 | default_emul_bfd_name () |
| 231 | { |
| 232 | abort (); |
| 233 | return NULL; |
| 234 | } |
| 235 | |
| 236 | void |
| 237 | common_emul_init () |
| 238 | { |
| 239 | this_format = this_emulation->format; |
| 240 | |
| 241 | if (this_emulation->leading_underscore == 2) |
| 242 | this_emulation->leading_underscore = this_format->dfl_leading_underscore; |
| 243 | |
| 244 | if (this_emulation->default_endian != 2) |
| 245 | target_big_endian = this_emulation->default_endian; |
| 246 | |
| 247 | if (this_emulation->fake_label_name == 0) |
| 248 | { |
| 249 | if (this_emulation->leading_underscore) |
| 250 | this_emulation->fake_label_name = "L0\001"; |
| 251 | else |
| 252 | /* What other parameters should we test? */ |
| 253 | this_emulation->fake_label_name = ".L0\001"; |
| 254 | } |
| 255 | } |
| 256 | #endif |
| 257 | |
| 258 | /* |
| 259 | * Since it is easy to do here we interpret the special arg "-" |
| 260 | * to mean "use stdin" and we set that argv[] pointing to "". |
| 261 | * After we have munged argv[], the only things left are source file |
| 262 | * name(s) and ""(s) denoting stdin. These file names are used |
| 263 | * (perhaps more than once) later. |
| 264 | * |
| 265 | * check for new machine-dep cmdline options in |
| 266 | * md_parse_option definitions in config/tc-*.c |
| 267 | */ |
| 268 | |
| 269 | static void |
| 270 | parse_args (pargc, pargv) |
| 271 | int *pargc; |
| 272 | char ***pargv; |
| 273 | { |
| 274 | int old_argc, new_argc; |
| 275 | char **old_argv, **new_argv; |
| 276 | |
| 277 | /* Starting the short option string with '-' is for programs that |
| 278 | expect options and other ARGV-elements in any order and that care about |
| 279 | the ordering of the two. We describe each non-option ARGV-element |
| 280 | as if it were the argument of an option with character code 1. */ |
| 281 | |
| 282 | char *shortopts; |
| 283 | extern CONST char *md_shortopts; |
| 284 | static const char std_shortopts[] = |
| 285 | { |
| 286 | '-', 'J', |
| 287 | #ifndef WORKING_DOT_WORD |
| 288 | /* -K is not meaningful if .word is not being hacked. */ |
| 289 | 'K', |
| 290 | #endif |
| 291 | 'L', 'M', 'R', 'W', 'Z', 'f', 'a', ':', ':', 'D', 'I', ':', 'o', ':', |
| 292 | #ifndef VMS |
| 293 | /* -v takes an argument on VMS, so we don't make it a generic |
| 294 | option. */ |
| 295 | 'v', |
| 296 | #endif |
| 297 | 'w', 'X', |
| 298 | /* New option for extending instruction set (see also --itbl below) */ |
| 299 | 't', ':', |
| 300 | '\0' |
| 301 | }; |
| 302 | struct option *longopts; |
| 303 | extern struct option md_longopts[]; |
| 304 | extern size_t md_longopts_size; |
| 305 | static const struct option std_longopts[] = { |
| 306 | #define OPTION_HELP (OPTION_STD_BASE) |
| 307 | {"help", no_argument, NULL, OPTION_HELP}, |
| 308 | {"mri", no_argument, NULL, 'M'}, |
| 309 | #define OPTION_NOCPP (OPTION_STD_BASE + 1) |
| 310 | {"nocpp", no_argument, NULL, OPTION_NOCPP}, |
| 311 | #define OPTION_STATISTICS (OPTION_STD_BASE + 2) |
| 312 | {"statistics", no_argument, NULL, OPTION_STATISTICS}, |
| 313 | #define OPTION_VERSION (OPTION_STD_BASE + 3) |
| 314 | {"version", no_argument, NULL, OPTION_VERSION}, |
| 315 | #define OPTION_DUMPCONFIG (OPTION_STD_BASE + 4) |
| 316 | {"dump-config", no_argument, NULL, OPTION_DUMPCONFIG}, |
| 317 | #define OPTION_VERBOSE (OPTION_STD_BASE + 5) |
| 318 | {"verbose", no_argument, NULL, OPTION_VERBOSE}, |
| 319 | #define OPTION_EMULATION (OPTION_STD_BASE + 6) |
| 320 | {"emulation", required_argument, NULL, OPTION_EMULATION}, |
| 321 | #define OPTION_DEFSYM (OPTION_STD_BASE + 7) |
| 322 | {"defsym", required_argument, NULL, OPTION_DEFSYM}, |
| 323 | #define OPTION_INSTTBL (OPTION_STD_BASE + 8) |
| 324 | /* New option for extending instruction set (see also -t above). |
| 325 | The "-t file" or "--itbl file" option extends the basic set of |
| 326 | valid instructions by reading "file", a text file containing a |
| 327 | list of instruction formats. The additional opcodes and their |
| 328 | formats are added to the built-in set of instructions, and |
| 329 | mnemonics for new registers may also be defined. */ |
| 330 | {"itbl", required_argument, NULL, OPTION_INSTTBL}, |
| 331 | #define OPTION_DEPFILE (OPTION_STD_BASE + 9) |
| 332 | {"MD", required_argument, NULL, OPTION_DEPFILE}, |
| 333 | #define OPTION_GSTABS (OPTION_STD_BASE + 10) |
| 334 | {"gstabs", no_argument, NULL, OPTION_GSTABS} |
| 335 | }; |
| 336 | |
| 337 | /* Construct the option lists from the standard list and the |
| 338 | target dependent list. */ |
| 339 | shortopts = concat (std_shortopts, md_shortopts, (char *) NULL); |
| 340 | longopts = (struct option *) xmalloc (sizeof (std_longopts) + md_longopts_size); |
| 341 | memcpy (longopts, std_longopts, sizeof (std_longopts)); |
| 342 | memcpy ((char *) longopts + sizeof (std_longopts), |
| 343 | md_longopts, md_longopts_size); |
| 344 | |
| 345 | /* Make a local copy of the old argv. */ |
| 346 | old_argc = *pargc; |
| 347 | old_argv = *pargv; |
| 348 | |
| 349 | /* Initialize a new argv that contains no options. */ |
| 350 | new_argv = (char **) xmalloc (sizeof (char *) * (old_argc + 1)); |
| 351 | new_argv[0] = old_argv[0]; |
| 352 | new_argc = 1; |
| 353 | new_argv[new_argc] = NULL; |
| 354 | |
| 355 | while (1) |
| 356 | { |
| 357 | /* getopt_long_only is like getopt_long, but '-' as well as '--' can |
| 358 | indicate a long option. */ |
| 359 | int longind; |
| 360 | int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts, |
| 361 | &longind); |
| 362 | |
| 363 | if (optc == -1) |
| 364 | break; |
| 365 | |
| 366 | switch (optc) |
| 367 | { |
| 368 | default: |
| 369 | /* md_parse_option should return 1 if it recognizes optc, |
| 370 | 0 if not. */ |
| 371 | if (md_parse_option (optc, optarg) != 0) |
| 372 | break; |
| 373 | /* `-v' isn't included in the general short_opts list, so check for |
| 374 | it explicity here before deciding we've gotten a bad argument. */ |
| 375 | if (optc == 'v') |
| 376 | { |
| 377 | #ifdef VMS |
| 378 | /* Telling getopt to treat -v's value as optional can result |
| 379 | in it picking up a following filename argument here. The |
| 380 | VMS code in md_parse_option can return 0 in that case, |
| 381 | but it has no way of pushing the filename argument back. */ |
| 382 | if (optarg && *optarg) |
| 383 | new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL; |
| 384 | else |
| 385 | #else |
| 386 | case 'v': |
| 387 | #endif |
| 388 | case OPTION_VERBOSE: |
| 389 | print_version_id (); |
| 390 | break; |
| 391 | } |
| 392 | /*FALLTHRU*/ |
| 393 | |
| 394 | case '?': |
| 395 | exit (EXIT_FAILURE); |
| 396 | |
| 397 | case 1: /* File name. */ |
| 398 | if (!strcmp (optarg, "-")) |
| 399 | optarg = ""; |
| 400 | new_argv[new_argc++] = optarg; |
| 401 | new_argv[new_argc] = NULL; |
| 402 | break; |
| 403 | |
| 404 | case OPTION_HELP: |
| 405 | show_usage (stdout); |
| 406 | exit (EXIT_SUCCESS); |
| 407 | |
| 408 | case OPTION_NOCPP: |
| 409 | break; |
| 410 | |
| 411 | case OPTION_STATISTICS: |
| 412 | flag_print_statistics = 1; |
| 413 | break; |
| 414 | |
| 415 | case OPTION_VERSION: |
| 416 | /* This output is intended to follow the GNU standards document. */ |
| 417 | printf ("GNU assembler %s\n", VERSION); |
| 418 | printf ("Copyright 1997 Free Software Foundation, Inc.\n"); |
| 419 | printf ("\ |
| 420 | This program is free software; you may redistribute it under the terms of\n\ |
| 421 | the GNU General Public License. This program has absolutely no warranty.\n"); |
| 422 | printf ("This assembler was configured for a target of `%s'.\n", |
| 423 | TARGET_ALIAS); |
| 424 | exit (EXIT_SUCCESS); |
| 425 | |
| 426 | case OPTION_EMULATION: |
| 427 | #ifdef USE_EMULATIONS |
| 428 | if (strcmp (optarg, this_emulation->name)) |
| 429 | as_fatal ("multiple emulation names specified"); |
| 430 | #else |
| 431 | as_fatal ("emulations not handled in this configuration"); |
| 432 | #endif |
| 433 | break; |
| 434 | |
| 435 | case OPTION_DUMPCONFIG: |
| 436 | fprintf (stderr, "alias = %s\n", TARGET_ALIAS); |
| 437 | fprintf (stderr, "canonical = %s\n", TARGET_CANONICAL); |
| 438 | fprintf (stderr, "cpu-type = %s\n", TARGET_CPU); |
| 439 | #ifdef TARGET_OBJ_FORMAT |
| 440 | fprintf (stderr, "format = %s\n", TARGET_OBJ_FORMAT); |
| 441 | #endif |
| 442 | #ifdef TARGET_FORMAT |
| 443 | fprintf (stderr, "bfd-target = %s\n", TARGET_FORMAT); |
| 444 | #endif |
| 445 | exit (EXIT_SUCCESS); |
| 446 | |
| 447 | case OPTION_DEFSYM: |
| 448 | { |
| 449 | char *s; |
| 450 | long i; |
| 451 | struct defsym_list *n; |
| 452 | |
| 453 | for (s = optarg; *s != '\0' && *s != '='; s++) |
| 454 | ; |
| 455 | if (*s == '\0') |
| 456 | as_fatal ("bad defsym; format is --defsym name=value"); |
| 457 | *s++ = '\0'; |
| 458 | i = strtol (s, (char **) NULL, 0); |
| 459 | n = (struct defsym_list *) xmalloc (sizeof *n); |
| 460 | n->next = defsyms; |
| 461 | n->name = optarg; |
| 462 | n->value = i; |
| 463 | defsyms = n; |
| 464 | } |
| 465 | break; |
| 466 | |
| 467 | case OPTION_INSTTBL: |
| 468 | case 't': |
| 469 | { |
| 470 | /* optarg is the name of the file containing the instruction |
| 471 | formats, opcodes, register names, etc. */ |
| 472 | struct itbl_file_list *n; |
| 473 | |
| 474 | if (optarg == NULL) |
| 475 | { |
| 476 | as_warn ( "No file name following -t option\n" ); |
| 477 | break; |
| 478 | } |
| 479 | |
| 480 | n = (struct itbl_file_list *) xmalloc (sizeof *n); |
| 481 | n->next = itbl_files; |
| 482 | n->name = optarg; |
| 483 | itbl_files = n; |
| 484 | |
| 485 | /* Parse the file and add the new instructions to our internal |
| 486 | table. If multiple instruction tables are specified, the |
| 487 | information from this table gets appended onto the existing |
| 488 | internal table. */ |
| 489 | itbl_files->name = xstrdup (optarg); |
| 490 | if (itbl_parse (itbl_files->name) != 0) |
| 491 | { |
| 492 | fprintf (stderr, "Failed to read instruction table %s\n", |
| 493 | itbl_files->name); |
| 494 | exit (EXIT_SUCCESS); |
| 495 | } |
| 496 | } |
| 497 | break; |
| 498 | |
| 499 | case OPTION_DEPFILE: |
| 500 | start_dependencies (optarg); |
| 501 | break; |
| 502 | |
| 503 | case OPTION_GSTABS: |
| 504 | debug_type = DEBUG_STABS; |
| 505 | break; |
| 506 | |
| 507 | case 'J': |
| 508 | flag_signed_overflow_ok = 1; |
| 509 | break; |
| 510 | |
| 511 | #ifndef WORKING_DOT_WORD |
| 512 | case 'K': |
| 513 | flag_warn_displacement = 1; |
| 514 | break; |
| 515 | #endif |
| 516 | |
| 517 | case 'L': |
| 518 | flag_keep_locals = 1; |
| 519 | break; |
| 520 | |
| 521 | case 'M': |
| 522 | flag_mri = 1; |
| 523 | #ifdef TC_M68K |
| 524 | flag_m68k_mri = 1; |
| 525 | #endif |
| 526 | break; |
| 527 | |
| 528 | case 'R': |
| 529 | flag_readonly_data_in_text = 1; |
| 530 | break; |
| 531 | |
| 532 | case 'W': |
| 533 | flag_no_warnings = 1; |
| 534 | break; |
| 535 | |
| 536 | case 'Z': |
| 537 | flag_always_generate_output = 1; |
| 538 | break; |
| 539 | |
| 540 | case 'a': |
| 541 | if (optarg) |
| 542 | { |
| 543 | while (*optarg) |
| 544 | { |
| 545 | switch (*optarg) |
| 546 | { |
| 547 | case 'c': |
| 548 | listing |= LISTING_NOCOND; |
| 549 | break; |
| 550 | case 'd': |
| 551 | listing |= LISTING_NODEBUG; |
| 552 | break; |
| 553 | case 'h': |
| 554 | listing |= LISTING_HLL; |
| 555 | break; |
| 556 | case 'l': |
| 557 | listing |= LISTING_LISTING; |
| 558 | break; |
| 559 | case 'n': |
| 560 | listing |= LISTING_NOFORM; |
| 561 | break; |
| 562 | case 's': |
| 563 | listing |= LISTING_SYMBOLS; |
| 564 | break; |
| 565 | case '=': |
| 566 | listing_filename = xstrdup (optarg + 1); |
| 567 | optarg += strlen (listing_filename); |
| 568 | break; |
| 569 | default: |
| 570 | as_fatal ("invalid listing option `%c'", *optarg); |
| 571 | break; |
| 572 | } |
| 573 | optarg++; |
| 574 | } |
| 575 | } |
| 576 | if (!listing) |
| 577 | listing = LISTING_DEFAULT; |
| 578 | break; |
| 579 | |
| 580 | case 'D': |
| 581 | /* DEBUG is implemented: it debugs different */ |
| 582 | /* things from other people's assemblers. */ |
| 583 | flag_debug = 1; |
| 584 | break; |
| 585 | |
| 586 | case 'f': |
| 587 | flag_no_comments = 1; |
| 588 | break; |
| 589 | |
| 590 | case 'I': |
| 591 | { /* Include file directory */ |
| 592 | char *temp = xstrdup (optarg); |
| 593 | add_include_dir (temp); |
| 594 | break; |
| 595 | } |
| 596 | |
| 597 | case 'o': |
| 598 | out_file_name = xstrdup (optarg); |
| 599 | break; |
| 600 | |
| 601 | case 'w': |
| 602 | break; |
| 603 | |
| 604 | case 'X': |
| 605 | /* -X means treat warnings as errors */ |
| 606 | break; |
| 607 | } |
| 608 | } |
| 609 | |
| 610 | free (shortopts); |
| 611 | free (longopts); |
| 612 | |
| 613 | *pargc = new_argc; |
| 614 | *pargv = new_argv; |
| 615 | } |
| 616 | |
| 617 | static long start_time; |
| 618 | |
| 619 | int |
| 620 | main (argc, argv) |
| 621 | int argc; |
| 622 | char **argv; |
| 623 | { |
| 624 | int macro_alternate; |
| 625 | int macro_strip_at; |
| 626 | int keep_it; |
| 627 | |
| 628 | start_time = get_run_time (); |
| 629 | |
| 630 | |
| 631 | if (debug_memory) |
| 632 | { |
| 633 | #ifdef BFD_ASSEMBLER |
| 634 | extern long _bfd_chunksize; |
| 635 | _bfd_chunksize = 64; |
| 636 | #endif |
| 637 | chunksize = 64; |
| 638 | } |
| 639 | |
| 640 | #ifdef HOST_SPECIAL_INIT |
| 641 | HOST_SPECIAL_INIT (argc, argv); |
| 642 | #endif |
| 643 | |
| 644 | myname = argv[0]; |
| 645 | xmalloc_set_program_name (myname); |
| 646 | |
| 647 | START_PROGRESS (myname, 0); |
| 648 | |
| 649 | #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME |
| 650 | #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out" |
| 651 | #endif |
| 652 | |
| 653 | out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME; |
| 654 | |
| 655 | hex_init (); |
| 656 | #ifdef BFD_ASSEMBLER |
| 657 | bfd_init (); |
| 658 | bfd_set_error_program_name (myname); |
| 659 | #endif |
| 660 | |
| 661 | #ifdef USE_EMULATIONS |
| 662 | select_emulation_mode (argc, argv); |
| 663 | #endif |
| 664 | |
| 665 | PROGRESS (1); |
| 666 | symbol_begin (); |
| 667 | frag_init (); |
| 668 | subsegs_begin (); |
| 669 | parse_args (&argc, &argv); |
| 670 | read_begin (); |
| 671 | input_scrub_begin (); |
| 672 | expr_begin (); |
| 673 | |
| 674 | if (flag_print_statistics) |
| 675 | xatexit (dump_statistics); |
| 676 | |
| 677 | macro_alternate = 0; |
| 678 | macro_strip_at = 0; |
| 679 | #ifdef TC_I960 |
| 680 | macro_strip_at = flag_mri; |
| 681 | #endif |
| 682 | #ifdef TC_A29K |
| 683 | /* For compatibility with the AMD 29K family macro assembler |
| 684 | specification. */ |
| 685 | macro_alternate = 1; |
| 686 | macro_strip_at = 1; |
| 687 | #endif |
| 688 | |
| 689 | macro_init (macro_alternate, flag_mri, macro_strip_at, macro_expr); |
| 690 | |
| 691 | PROGRESS (1); |
| 692 | |
| 693 | #ifdef BFD_ASSEMBLER |
| 694 | output_file_create (out_file_name); |
| 695 | assert (stdoutput != 0); |
| 696 | #endif |
| 697 | |
| 698 | #ifdef tc_init_after_args |
| 699 | tc_init_after_args (); |
| 700 | #endif |
| 701 | |
| 702 | itbl_init (); |
| 703 | |
| 704 | /* Now that we have fully initialized, and have created the output |
| 705 | file, define any symbols requested by --defsym command line |
| 706 | arguments. */ |
| 707 | while (defsyms != NULL) |
| 708 | { |
| 709 | symbolS *sym; |
| 710 | struct defsym_list *next; |
| 711 | |
| 712 | sym = symbol_new (defsyms->name, absolute_section, defsyms->value, |
| 713 | &zero_address_frag); |
| 714 | symbol_table_insert (sym); |
| 715 | next = defsyms->next; |
| 716 | free (defsyms); |
| 717 | defsyms = next; |
| 718 | } |
| 719 | |
| 720 | PROGRESS (1); |
| 721 | |
| 722 | perform_an_assembly_pass (argc, argv); /* Assemble it. */ |
| 723 | |
| 724 | cond_finish_check (-1); |
| 725 | |
| 726 | #ifdef md_end |
| 727 | md_end (); |
| 728 | #endif |
| 729 | |
| 730 | if (seen_at_least_1_file () |
| 731 | && (flag_always_generate_output || had_errors () == 0)) |
| 732 | keep_it = 1; |
| 733 | else |
| 734 | keep_it = 0; |
| 735 | |
| 736 | if (keep_it) |
| 737 | write_object_file (); |
| 738 | |
| 739 | #ifndef NO_LISTING |
| 740 | listing_print (listing_filename); |
| 741 | #endif |
| 742 | |
| 743 | #ifndef OBJ_VMS /* does its own file handling */ |
| 744 | #ifndef BFD_ASSEMBLER |
| 745 | if (keep_it) |
| 746 | #endif |
| 747 | output_file_close (out_file_name); |
| 748 | #endif |
| 749 | |
| 750 | if (had_errors () > 0 && ! flag_always_generate_output) |
| 751 | keep_it = 0; |
| 752 | |
| 753 | if (!keep_it) |
| 754 | unlink (out_file_name); |
| 755 | |
| 756 | input_scrub_end (); |
| 757 | |
| 758 | END_PROGRESS (myname); |
| 759 | |
| 760 | /* Use xexit instead of return, because under VMS environments they |
| 761 | may not place the same interpretation on the value given. */ |
| 762 | if (had_errors () > 0) |
| 763 | xexit (EXIT_FAILURE); |
| 764 | |
| 765 | /* Only generate dependency file if assembler was successful. */ |
| 766 | print_dependencies (); |
| 767 | |
| 768 | xexit (EXIT_SUCCESS); |
| 769 | } |
| 770 | |
| 771 | static void |
| 772 | dump_statistics () |
| 773 | { |
| 774 | extern char **environ; |
| 775 | #ifdef HAVE_SBRK |
| 776 | char *lim = (char *) sbrk (0); |
| 777 | #endif |
| 778 | long run_time = get_run_time () - start_time; |
| 779 | |
| 780 | fprintf (stderr, "%s: total time in assembly: %ld.%06ld\n", |
| 781 | myname, run_time / 1000000, run_time % 1000000); |
| 782 | #ifdef HAVE_SBRK |
| 783 | fprintf (stderr, "%s: data size %ld\n", |
| 784 | myname, (long) (lim - (char *) &environ)); |
| 785 | #endif |
| 786 | |
| 787 | subsegs_print_statistics (stderr); |
| 788 | write_print_statistics (stderr); |
| 789 | symbol_print_statistics (stderr); |
| 790 | read_print_statistics (stderr); |
| 791 | |
| 792 | #ifdef tc_print_statistics |
| 793 | tc_print_statistics (stderr); |
| 794 | #endif |
| 795 | #ifdef obj_print_statistics |
| 796 | obj_print_statistics (stderr); |
| 797 | #endif |
| 798 | } |
| 799 | \f |
| 800 | |
| 801 | /* perform_an_assembly_pass() |
| 802 | * |
| 803 | * Here to attempt 1 pass over each input file. |
| 804 | * We scan argv[*] looking for filenames or exactly "" which is |
| 805 | * shorthand for stdin. Any argv that is NULL is not a file-name. |
| 806 | * We set need_pass_2 TRUE if, after this, we still have unresolved |
| 807 | * expressions of the form (unknown value)+-(unknown value). |
| 808 | * |
| 809 | * Note the un*x semantics: there is only 1 logical input file, but it |
| 810 | * may be a catenation of many 'physical' input files. |
| 811 | */ |
| 812 | static void |
| 813 | perform_an_assembly_pass (argc, argv) |
| 814 | int argc; |
| 815 | char **argv; |
| 816 | { |
| 817 | int saw_a_file = 0; |
| 818 | #ifdef BFD_ASSEMBLER |
| 819 | flagword applicable; |
| 820 | #endif |
| 821 | |
| 822 | need_pass_2 = 0; |
| 823 | |
| 824 | #ifndef BFD_ASSEMBLER |
| 825 | #ifdef MANY_SEGMENTS |
| 826 | { |
| 827 | unsigned int i; |
| 828 | for (i = SEG_E0; i < SEG_UNKNOWN; i++) |
| 829 | segment_info[i].fix_root = 0; |
| 830 | } |
| 831 | /* Create the three fixed ones */ |
| 832 | { |
| 833 | segT seg; |
| 834 | |
| 835 | #ifdef TE_APOLLO |
| 836 | seg = subseg_new (".wtext", 0); |
| 837 | #else |
| 838 | seg = subseg_new (".text", 0); |
| 839 | #endif |
| 840 | assert (seg == SEG_E0); |
| 841 | seg = subseg_new (".data", 0); |
| 842 | assert (seg == SEG_E1); |
| 843 | seg = subseg_new (".bss", 0); |
| 844 | assert (seg == SEG_E2); |
| 845 | #ifdef TE_APOLLO |
| 846 | create_target_segments (); |
| 847 | #endif |
| 848 | } |
| 849 | |
| 850 | #else /* not MANY_SEGMENTS */ |
| 851 | text_fix_root = NULL; |
| 852 | data_fix_root = NULL; |
| 853 | bss_fix_root = NULL; |
| 854 | #endif /* not MANY_SEGMENTS */ |
| 855 | #else /* BFD_ASSEMBLER */ |
| 856 | /* Create the standard sections, and those the assembler uses |
| 857 | internally. */ |
| 858 | text_section = subseg_new (".text", 0); |
| 859 | data_section = subseg_new (".data", 0); |
| 860 | bss_section = subseg_new (".bss", 0); |
| 861 | /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed |
| 862 | to have relocs, otherwise we don't find out in time. */ |
| 863 | applicable = bfd_applicable_section_flags (stdoutput); |
| 864 | bfd_set_section_flags (stdoutput, text_section, |
| 865 | applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC |
| 866 | | SEC_CODE | SEC_READONLY)); |
| 867 | /* @@ FIXME -- SEC_CODE seems to mean code only, rather than code possibly.*/ |
| 868 | bfd_set_section_flags (stdoutput, data_section, |
| 869 | applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)); |
| 870 | bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC); |
| 871 | seg_info (bss_section)->bss = 1; |
| 872 | subseg_new (BFD_ABS_SECTION_NAME, 0); |
| 873 | subseg_new (BFD_UND_SECTION_NAME, 0); |
| 874 | reg_section = subseg_new ("*GAS `reg' section*", 0); |
| 875 | expr_section = subseg_new ("*GAS `expr' section*", 0); |
| 876 | |
| 877 | #endif /* BFD_ASSEMBLER */ |
| 878 | |
| 879 | subseg_set (text_section, 0); |
| 880 | |
| 881 | /* This may add symbol table entries, which requires having an open BFD, |
| 882 | and sections already created, in BFD_ASSEMBLER mode. */ |
| 883 | md_begin (); |
| 884 | |
| 885 | #ifdef obj_begin |
| 886 | obj_begin (); |
| 887 | #endif |
| 888 | |
| 889 | argv++; /* skip argv[0] */ |
| 890 | argc--; /* skip argv[0] */ |
| 891 | while (argc--) |
| 892 | { |
| 893 | if (*argv) |
| 894 | { /* Is it a file-name argument? */ |
| 895 | PROGRESS (1); |
| 896 | saw_a_file++; |
| 897 | /* argv->"" if stdin desired, else->filename */ |
| 898 | read_a_source_file (*argv); |
| 899 | } |
| 900 | argv++; /* completed that argv */ |
| 901 | } |
| 902 | if (!saw_a_file) |
| 903 | read_a_source_file (""); |
| 904 | } /* perform_an_assembly_pass() */ |
| 905 | |
| 906 | /* The interface between the macro code and gas expression handling. */ |
| 907 | |
| 908 | static int |
| 909 | macro_expr (emsg, idx, in, val) |
| 910 | const char *emsg; |
| 911 | int idx; |
| 912 | sb *in; |
| 913 | int *val; |
| 914 | { |
| 915 | char *hold; |
| 916 | expressionS ex; |
| 917 | |
| 918 | sb_terminate (in); |
| 919 | |
| 920 | hold = input_line_pointer; |
| 921 | input_line_pointer = in->ptr + idx; |
| 922 | expression (&ex); |
| 923 | idx = input_line_pointer - in->ptr; |
| 924 | input_line_pointer = hold; |
| 925 | |
| 926 | if (ex.X_op != O_constant) |
| 927 | as_bad ("%s", emsg); |
| 928 | |
| 929 | *val = (int) ex.X_add_number; |
| 930 | |
| 931 | return idx; |
| 932 | } |
| 933 | |
| 934 | /* end of as.c */ |