as.c revision 77298
1272343Sngie/* as.c - GAS main program. 2272343Sngie Copyright (C) 1987, 1990, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001 3272343Sngie Free Software Foundation, Inc. 4272343Sngie 5272343Sngie This file is part of GAS, the GNU Assembler. 6272343Sngie 7272343Sngie GAS is free software; you can redistribute it and/or modify 8272343Sngie it under the terms of the GNU General Public License as published by 9272343Sngie the Free Software Foundation; either version 2, or (at your option) 10272343Sngie any later version. 11272343Sngie 12272343Sngie GAS is distributed in the hope that it will be useful, 13272343Sngie but WITHOUT ANY WARRANTY; without even the implied warranty of 14272343Sngie MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15272343Sngie GNU General Public License for more details. 16272343Sngie 17272343Sngie You should have received a copy of the GNU General Public License 18272343Sngie along with GAS; see the file COPYING. If not, write to the Free 19272343Sngie Software Foundation, 59 Temple Place - Suite 330, Boston, MA 20272343Sngie 02111-1307, USA. */ 21272343Sngie 22272343Sngie/* Main program for AS; a 32-bit assembler of GNU. 23272343Sngie * Understands command arguments. 24272343Sngie * Has a few routines that don't fit in other modules because they 25272343Sngie * are shared. 26272343Sngie * 27272343Sngie * bugs 28272343Sngie * 29272343Sngie * : initialisers 30272343Sngie * Since no-one else says they will support them in future: I 31272343Sngie * don't support them now. 32272343Sngie */ 33272343Sngie 34272343Sngie#include "ansidecl.h" 35272343Sngie 36272343Sngie#define COMMON 37272343Sngie 38272343Sngie#include "as.h" 39272343Sngie#include "subsegs.h" 40272343Sngie#include "output-file.h" 41272343Sngie#include "sb.h" 42272343Sngie#include "macro.h" 43272343Sngie#include "dwarf2dbg.h" 44272343Sngie 45272343Sngie#ifdef HAVE_ITBL_CPU 46272343Sngie#include "itbl-ops.h" 47272343Sngie#else 48272343Sngie#define itbl_parse(itbl_file) 1 49272343Sngie#define itbl_init() 50272343Sngie#endif 51272343Sngie 52272343Sngie#ifdef HAVE_SBRK 53272343Sngie#ifdef NEED_DECLARATION_SBRK 54272343Sngieextern PTR sbrk (); 55272343Sngie#endif 56272343Sngie#endif 57272343Sngie 58272343Sngiestatic void show_usage PARAMS ((FILE *)); 59272343Sngiestatic void parse_args PARAMS ((int *, char ***)); 60272343Sngiestatic void dump_statistics PARAMS ((void)); 61272343Sngiestatic void perform_an_assembly_pass PARAMS ((int argc, char **argv)); 62272343Sngiestatic int macro_expr PARAMS ((const char *, int, sb *, int *)); 63272343Sngie 64272343Sngie/* True if a listing is wanted. */ 65272343Sngieint listing; 66272343Sngie 67272343Sngie/* Name of listing file. */ 68272343Sngiestatic char *listing_filename = NULL; 69272343Sngie 70272343Sngie/* Type of debugging to generate. */ 71272343Sngie 72272343Sngieenum debug_info_type debug_type = DEBUG_UNSPECIFIED; 73272343Sngie 74272343Sngie/* Maximum level of macro nesting. */ 75272343Sngieint max_macro_nest = 100; 76272343Sngie 77272343Sngie/* argv[0] */ 78272343Sngiechar *myname; 79272343Sngie#ifdef BFD_ASSEMBLER 80272343SngiesegT reg_section, expr_section; 81272343SngiesegT text_section, data_section, bss_section; 82272343Sngie#endif 83272343Sngie 84272343Sngie/* The default obstack chunk size. If we set this to zero, the 85272343Sngie obstack code will use whatever will fit in a 4096 byte block. */ 86272343Sngieint chunksize = 0; 87272343Sngie 88272343Sngie/* To monitor memory allocation more effectively, make this non-zero. 89272343Sngie Then the chunk sizes for gas and bfd will be reduced. */ 90272343Sngieint debug_memory = 0; 91272343Sngie 92272343Sngie/* We build a list of defsyms as we read the options, and then define 93272343Sngie them after we have initialized everything. */ 94272343Sngie 95272343Sngiestruct defsym_list { 96272343Sngie struct defsym_list *next; 97272343Sngie char *name; 98272343Sngie valueT value; 99272343Sngie}; 100272343Sngie 101272343Sngiestatic struct defsym_list *defsyms; 102272343Sngie 103272343Sngie/* Keep a record of the itbl files we read in. */ 104272343Sngie 105272343Sngiestruct itbl_file_list { 106272343Sngie struct itbl_file_list *next; 107272343Sngie char *name; 108272343Sngie}; 109272343Sngie 110272343Sngiestatic struct itbl_file_list *itbl_files; 111272343Sngie 112272343Sngie#ifdef USE_EMULATIONS 113272343Sngie#define EMULATION_ENVIRON "AS_EMULATION" 114272343Sngie 115272343Sngieextern struct emulation mipsbelf, mipslelf, mipself; 116272343Sngieextern struct emulation mipsbecoff, mipslecoff, mipsecoff; 117272343Sngieextern struct emulation i386coff, i386elf, i386aout; 118272343Sngieextern struct emulation crisaout, criself; 119272343Sngie 120272343Sngiestatic struct emulation *const emulations[] = { EMULATIONS }; 121272343Sngiestatic const int n_emulations = sizeof (emulations) / sizeof (emulations[0]); 122272343Sngie 123272343Sngiestatic void select_emulation_mode PARAMS ((int, char **)); 124272343Sngie 125272343Sngiestatic void 126272343Sngieselect_emulation_mode (argc, argv) 127272343Sngie int argc; 128272343Sngie char **argv; 129272343Sngie{ 130272343Sngie int i; 131272343Sngie char *p, *em = 0; 132272343Sngie 133272343Sngie for (i = 1; i < argc; i++) 134 if (!strncmp ("--em", argv[i], 4)) 135 break; 136 137 if (i == argc) 138 goto do_default; 139 140 p = strchr (argv[i], '='); 141 if (p) 142 p++; 143 else 144 p = argv[i + 1]; 145 146 if (!p || !*p) 147 as_fatal (_("missing emulation mode name")); 148 em = p; 149 150 do_default: 151 if (em == 0) 152 em = getenv (EMULATION_ENVIRON); 153 if (em == 0) 154 em = DEFAULT_EMULATION; 155 156 if (em) 157 { 158 for (i = 0; i < n_emulations; i++) 159 if (!strcmp (emulations[i]->name, em)) 160 break; 161 if (i == n_emulations) 162 as_fatal (_("unrecognized emulation name `%s'"), em); 163 this_emulation = emulations[i]; 164 } 165 else 166 this_emulation = emulations[0]; 167 168 this_emulation->init (); 169} 170 171const char * 172default_emul_bfd_name () 173{ 174 abort (); 175 return NULL; 176} 177 178void 179common_emul_init () 180{ 181 this_format = this_emulation->format; 182 183 if (this_emulation->leading_underscore == 2) 184 this_emulation->leading_underscore = this_format->dfl_leading_underscore; 185 186 if (this_emulation->default_endian != 2) 187 target_big_endian = this_emulation->default_endian; 188 189 if (this_emulation->fake_label_name == 0) 190 { 191 if (this_emulation->leading_underscore) 192 this_emulation->fake_label_name = "L0\001"; 193 else 194 /* What other parameters should we test? */ 195 this_emulation->fake_label_name = ".L0\001"; 196 } 197} 198#endif 199 200void 201print_version_id () 202{ 203 static int printed; 204 if (printed) 205 return; 206 printed = 1; 207 208#ifdef BFD_ASSEMBLER 209 fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s"), 210 VERSION, TARGET_ALIAS, BFD_VERSION); 211#else 212 fprintf (stderr, _("GNU assembler version %s (%s)"), VERSION, TARGET_ALIAS); 213#endif 214 fprintf (stderr, "\n"); 215} 216 217static void 218show_usage (stream) 219 FILE *stream; 220{ 221 fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname); 222 223 fprintf (stream, _("\ 224Options:\n\ 225 -a[sub-option...] turn on listings\n\ 226 Sub-options [default hls]:\n\ 227 c omit false conditionals\n\ 228 d omit debugging directives\n\ 229 h include high-level source\n\ 230 l include assembly\n\ 231 m include macro expansions\n\ 232 n omit forms processing\n\ 233 s include symbols\n\ 234 L include line debug statistics (if applicable)\n\ 235 =FILE list to FILE (must be last sub-option)\n")); 236 237 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 242 { 243 int i; 244 char *def_em; 245 246 fprintf (stream, "\ 247 --em=["); 248 for (i = 0; i < n_emulations - 1; i++) 249 fprintf (stream, "%s | ", emulations[i]->name); 250 fprintf (stream, "%s]\n", emulations[i]->name); 251 252 def_em = getenv (EMULATION_ENVIRON); 253 if (!def_em) 254 def_em = DEFAULT_EMULATION; 255 fprintf (stream, _("\ 256 emulate output (default %s)\n"), def_em); 257 } 258#endif 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, _("\ 282 -nocpp ignored\n")); 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, _("\ 305 -w ignored\n")); 306 fprintf (stream, _("\ 307 -X ignored\n")); 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\ 312 the listing\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")); 323 324 md_show_usage (stream); 325 326 fputc ('\n', stream); 327 fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO); 328} 329 330/* 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. 335 336 check for new machine-dep cmdline options in 337 md_parse_option definitions in config/tc-*.c. */ 338 339static void 340parse_args (pargc, pargv) 341 int *pargc; 342 char ***pargv; 343{ 344 int old_argc, new_argc; 345 char **old_argv, **new_argv; 346 347 /* 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. */ 351 352 char *shortopts; 353 extern CONST char *md_shortopts; 354 static const char std_shortopts[] = { 355 '-', 'J', 356#ifndef WORKING_DOT_WORD 357 /* -K is not meaningful if .word is not being hacked. */ 358 'K', 359#endif 360 'L', 'M', 'R', 'W', 'Z', 'f', 'a', ':', ':', 'D', 'I', ':', 'o', ':', 361#ifndef VMS 362 /* -v takes an argument on VMS, so we don't make it a generic 363 option. */ 364 'v', 365#endif 366 'w', 'X', 367 /* New option for extending instruction set (see also --itbl below) */ 368 't', ':', 369 '\0' 370 }; 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-width", 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. */ 428 }; 429 430 /* 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) 435 + md_longopts_size 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)); 442 443 /* Make a local copy of the old argv. */ 444 old_argc = *pargc; 445 old_argv = *pargv; 446 447 /* 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]; 450 new_argc = 1; 451 new_argv[new_argc] = NULL; 452 453 while (1) 454 { 455 /* getopt_long_only is like getopt_long, but '-' as well as '--' can 456 indicate a long option. */ 457 int longind; 458 int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts, 459 &longind); 460 461 if (optc == -1) 462 break; 463 464 switch (optc) 465 { 466 default: 467 /* md_parse_option should return 1 if it recognizes optc, 468 0 if not. */ 469 if (md_parse_option (optc, optarg) != 0) 470 break; 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. */ 473 if (optc == 'v') 474 { 475#ifdef VMS 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; 482 else 483#else 484 case 'v': 485#endif 486 case OPTION_VERBOSE: 487 print_version_id (); 488 break; 489 } 490 /* Fall through. */ 491 492 case '?': 493 exit (EXIT_FAILURE); 494 495 case 1: /* File name. */ 496 if (!strcmp (optarg, "-")) 497 optarg = ""; 498 new_argv[new_argc++] = optarg; 499 new_argv[new_argc] = NULL; 500 break; 501 502 case OPTION_TARGET_HELP: 503 md_show_usage (stdout); 504 exit (EXIT_SUCCESS); 505 506 case OPTION_HELP: 507 show_usage (stdout); 508 exit (EXIT_SUCCESS); 509 510 case OPTION_NOCPP: 511 break; 512 513 case OPTION_STATISTICS: 514 flag_print_statistics = 1; 515 break; 516 517 case OPTION_STRIP_LOCAL_ABSOLUTE: 518 flag_strip_local_absolute = 1; 519 break; 520 521 case OPTION_TRADITIONAL_FORMAT: 522 flag_traditional_format = 1; 523 break; 524 525 case OPTION_VERSION: 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")); 529 printf (_("\ 530This program is free software; you may redistribute it under the terms of\n\ 531the GNU General Public License. This program has absolutely no warranty.\n")); 532 printf (_("This assembler was configured for a target of `%s'.\n"), 533 TARGET_ALIAS); 534 exit (EXIT_SUCCESS); 535 536 case OPTION_EMULATION: 537#ifdef USE_EMULATIONS 538 if (strcmp (optarg, this_emulation->name)) 539 as_fatal (_("multiple emulation names specified")); 540#else 541 as_fatal (_("emulations not handled in this configuration")); 542#endif 543 break; 544 545 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); 551#endif 552#ifdef TARGET_FORMAT 553 fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT); 554#endif 555 exit (EXIT_SUCCESS); 556 557 case OPTION_DEFSYM: 558 { 559 char *s; 560 valueT i; 561 struct defsym_list *n; 562 563 for (s = optarg; *s != '\0' && *s != '='; s++) 564 ; 565 if (*s == '\0') 566 as_fatal (_("bad defsym; format is --defsym name=value")); 567 *s++ = '\0'; 568#ifdef BFD_ASSEMBLER 569 i = bfd_scan_vma (s, (const char **) NULL, 0); 570#else 571 i = strtol (s, (char **) NULL, 0); 572#endif 573 n = (struct defsym_list *) xmalloc (sizeof *n); 574 n->next = defsyms; 575 n->name = optarg; 576 n->value = i; 577 defsyms = n; 578 } 579 break; 580 581 case OPTION_INSTTBL: 582 case 't': 583 { 584 /* optarg is the name of the file containing the instruction 585 formats, opcodes, register names, etc. */ 586 struct itbl_file_list *n; 587 588 if (optarg == NULL) 589 { 590 as_warn (_("No file name following -t option\n")); 591 break; 592 } 593 594 n = (struct itbl_file_list *) xmalloc (sizeof *n); 595 n->next = itbl_files; 596 n->name = optarg; 597 itbl_files = n; 598 599 /* 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 602 internal table. */ 603 itbl_files->name = xstrdup (optarg); 604 if (itbl_parse (itbl_files->name) != 0) 605 { 606 fprintf (stderr, _("Failed to read instruction table %s\n"), 607 itbl_files->name); 608 exit (EXIT_SUCCESS); 609 } 610 } 611 break; 612 613 case OPTION_DEPFILE: 614 start_dependencies (optarg); 615 break; 616 617 case OPTION_GSTABS: 618 debug_type = DEBUG_STABS; 619 break; 620 621 case OPTION_GDWARF2: 622 debug_type = DEBUG_DWARF2; 623 break; 624 625 case 'J': 626 flag_signed_overflow_ok = 1; 627 break; 628 629#ifndef WORKING_DOT_WORD 630 case 'K': 631 flag_warn_displacement = 1; 632 break; 633#endif 634 635 case 'L': 636 flag_keep_locals = 1; 637 break; 638 639 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; 643 break; 644 case OPTION_LISTING_LHS_WIDTH2: 645 { 646 int tmp = atoi (optarg); 647 if (tmp > listing_lhs_width) 648 listing_lhs_width_second = tmp; 649 } 650 break; 651 case OPTION_LISTING_RHS_WIDTH: 652 listing_rhs_width = atoi (optarg); 653 break; 654 case OPTION_LISTING_CONT_LINES: 655 listing_lhs_cont_lines = atoi (optarg); 656 break; 657 658 case 'M': 659 flag_mri = 1; 660#ifdef TC_M68K 661 flag_m68k_mri = 1; 662#endif 663 break; 664 665 case 'R': 666 flag_readonly_data_in_text = 1; 667 break; 668 669 case 'W': 670 flag_no_warnings = 1; 671 break; 672 673 case OPTION_WARN: 674 flag_no_warnings = 0; 675 flag_fatal_warnings = 0; 676 break; 677 678 case OPTION_WARN_FATAL: 679 flag_no_warnings = 0; 680 flag_fatal_warnings = 1; 681 break; 682 683 case 'Z': 684 flag_always_generate_output = 1; 685 break; 686 687 case 'a': 688 if (optarg) 689 { 690 if (md_parse_option (optc, optarg) != 0) 691 break; 692 693 while (*optarg) 694 { 695 switch (*optarg) 696 { 697 case 'c': 698 listing |= LISTING_NOCOND; 699 break; 700 case 'd': 701 listing |= LISTING_NODEBUG; 702 break; 703 case 'h': 704 listing |= LISTING_HLL; 705 break; 706 case 'l': 707 listing |= LISTING_LISTING; 708 break; 709 case 'm': 710 listing |= LISTING_MACEXP; 711 break; 712 case 'n': 713 listing |= LISTING_NOFORM; 714 break; 715 case 's': 716 listing |= LISTING_SYMBOLS; 717 break; 718 case '=': 719 listing_filename = xstrdup (optarg + 1); 720 optarg += strlen (listing_filename); 721 break; 722 default: 723 as_fatal (_("invalid listing option `%c'"), *optarg); 724 break; 725 } 726 optarg++; 727 } 728 } 729 if (!listing) 730 listing = LISTING_DEFAULT; 731 break; 732 733 case 'D': 734 /* DEBUG is implemented: it debugs different 735 things from other people's assemblers. */ 736 flag_debug = 1; 737 break; 738 739 case 'f': 740 flag_no_comments = 1; 741 break; 742 743 case 'I': 744 { /* Include file directory. */ 745 char *temp = xstrdup (optarg); 746 add_include_dir (temp); 747 break; 748 } 749 750 case 'o': 751 out_file_name = xstrdup (optarg); 752 break; 753 754 case 'w': 755 break; 756 757 case 'X': 758 /* -X means treat warnings as errors. */ 759 break; 760 } 761 } 762 763 free (shortopts); 764 free (longopts); 765 766 *pargc = new_argc; 767 *pargv = new_argv; 768} 769 770static long start_time; 771 772int 773main (argc, argv) 774 int argc; 775 char **argv; 776{ 777 int macro_alternate; 778 int macro_strip_at; 779 int keep_it; 780 781 start_time = get_run_time (); 782 783#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) 784 setlocale (LC_MESSAGES, ""); 785#endif 786 bindtextdomain (PACKAGE, LOCALEDIR); 787 textdomain (PACKAGE); 788 789 if (debug_memory) 790 { 791#ifdef BFD_ASSEMBLER 792 extern long _bfd_chunksize; 793 _bfd_chunksize = 64; 794#endif 795 chunksize = 64; 796 } 797 798#ifdef HOST_SPECIAL_INIT 799 HOST_SPECIAL_INIT (argc, argv); 800#endif 801 802 myname = argv[0]; 803 xmalloc_set_program_name (myname); 804 805 START_PROGRESS (myname, 0); 806 807#ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME 808#define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out" 809#endif 810 811 out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME; 812 813 hex_init (); 814#ifdef BFD_ASSEMBLER 815 bfd_init (); 816 bfd_set_error_program_name (myname); 817#endif 818 819#ifdef USE_EMULATIONS 820 select_emulation_mode (argc, argv); 821#endif 822 823 PROGRESS (1); 824 symbol_begin (); 825 frag_init (); 826 subsegs_begin (); 827 parse_args (&argc, &argv); 828 read_begin (); 829 input_scrub_begin (); 830 expr_begin (); 831 832 if (flag_print_statistics) 833 xatexit (dump_statistics); 834 835 macro_alternate = 0; 836 macro_strip_at = 0; 837#ifdef TC_I960 838 macro_strip_at = flag_mri; 839#endif 840#ifdef TC_A29K 841 /* For compatibility with the AMD 29K family macro assembler 842 specification. */ 843 macro_alternate = 1; 844 macro_strip_at = 1; 845#endif 846 847 macro_init (macro_alternate, flag_mri, macro_strip_at, macro_expr); 848 849 PROGRESS (1); 850 851#ifdef BFD_ASSEMBLER 852 output_file_create (out_file_name); 853 assert (stdoutput != 0); 854#endif 855 856#ifdef tc_init_after_args 857 tc_init_after_args (); 858#endif 859 860 itbl_init (); 861 862 /* Now that we have fully initialized, and have created the output 863 file, define any symbols requested by --defsym command line 864 arguments. */ 865 while (defsyms != NULL) 866 { 867 symbolS *sym; 868 struct defsym_list *next; 869 870 sym = symbol_new (defsyms->name, absolute_section, defsyms->value, 871 &zero_address_frag); 872 symbol_table_insert (sym); 873 next = defsyms->next; 874 free (defsyms); 875 defsyms = next; 876 } 877 878 PROGRESS (1); 879 880 /* Assemble it. */ 881 perform_an_assembly_pass (argc, argv); 882 883 cond_finish_check (-1); 884 885#ifdef md_end 886 md_end (); 887#endif 888 889 /* If we've been collecting dwarf2 .debug_line info, either for 890 assembly debugging or on behalf of the compiler, emit it now. */ 891 dwarf2_finish (); 892 893 if (seen_at_least_1_file () 894 && (flag_always_generate_output || had_errors () == 0)) 895 keep_it = 1; 896 else 897 keep_it = 0; 898 899#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. */ 904 subsegs_finish (); 905#endif 906 907 if (keep_it) 908 write_object_file (); 909 910#ifndef NO_LISTING 911 listing_print (listing_filename); 912#endif 913 914#ifndef OBJ_VMS /* does its own file handling */ 915#ifndef BFD_ASSEMBLER 916 if (keep_it) 917#endif 918 output_file_close (out_file_name); 919#endif 920 921 if (flag_fatal_warnings && had_warnings () > 0 && had_errors () == 0) 922 as_bad (_("%d warnings, treating warnings as errors"), had_warnings ()); 923 924 if (had_errors () > 0 && ! flag_always_generate_output) 925 keep_it = 0; 926 927 if (!keep_it) 928 unlink (out_file_name); 929 930 input_scrub_end (); 931 932 END_PROGRESS (myname); 933 934 /* 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); 938 939 /* Only generate dependency file if assembler was successful. */ 940 print_dependencies (); 941 942 xexit (EXIT_SUCCESS); 943} 944 945static void 946dump_statistics () 947{ 948#ifdef HAVE_SBRK 949 char *lim = (char *) sbrk (0); 950#endif 951 long run_time = get_run_time () - start_time; 952 953 fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"), 954 myname, run_time / 1000000, run_time % 1000000); 955#ifdef HAVE_SBRK 956 fprintf (stderr, _("%s: data size %ld\n"), 957 myname, (long) (lim - (char *) &environ)); 958#endif 959 960 subsegs_print_statistics (stderr); 961 write_print_statistics (stderr); 962 symbol_print_statistics (stderr); 963 read_print_statistics (stderr); 964 965#ifdef tc_print_statistics 966 tc_print_statistics (stderr); 967#endif 968#ifdef obj_print_statistics 969 obj_print_statistics (stderr); 970#endif 971} 972 973/* 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). 978 979 Note the un*x semantics: there is only 1 logical input file, but it 980 may be a catenation of many 'physical' input files. */ 981 982static void 983perform_an_assembly_pass (argc, argv) 984 int argc; 985 char **argv; 986{ 987 int saw_a_file = 0; 988#ifdef BFD_ASSEMBLER 989 flagword applicable; 990#endif 991 992 need_pass_2 = 0; 993 994#ifndef BFD_ASSEMBLER 995#ifdef MANY_SEGMENTS 996 { 997 unsigned int i; 998 for (i = SEG_E0; i < SEG_UNKNOWN; i++) 999 segment_info[i].fix_root = 0; 1000 } 1001 /* Create the three fixed ones. */ 1002 { 1003 segT seg; 1004 1005#ifdef TE_APOLLO 1006 seg = subseg_new (".wtext", 0); 1007#else 1008 seg = subseg_new (".text", 0); 1009#endif 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); 1015#ifdef TE_APOLLO 1016 create_target_segments (); 1017#endif 1018 } 1019 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 1027 internally. */ 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 1039 | SEC_DATA)); 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); 1046 1047#endif /* BFD_ASSEMBLER */ 1048 1049 subseg_set (text_section, 0); 1050 1051 /* This may add symbol table entries, which requires having an open BFD, 1052 and sections already created, in BFD_ASSEMBLER mode. */ 1053 md_begin (); 1054 1055#ifdef obj_begin 1056 obj_begin (); 1057#endif 1058 1059 /* Skip argv[0]. */ 1060 argv++; 1061 argc--; 1062 1063 while (argc--) 1064 { 1065 if (*argv) 1066 { /* Is it a file-name argument? */ 1067 PROGRESS (1); 1068 saw_a_file++; 1069 /* argv->"" if stdin desired, else->filename */ 1070 read_a_source_file (*argv); 1071 } 1072 argv++; /* completed that argv */ 1073 } 1074 if (!saw_a_file) 1075 read_a_source_file (""); 1076} 1077 1078/* The interface between the macro code and gas expression handling. */ 1079 1080static int 1081macro_expr (emsg, idx, in, val) 1082 const char *emsg; 1083 int idx; 1084 sb *in; 1085 int *val; 1086{ 1087 char *hold; 1088 expressionS ex; 1089 1090 sb_terminate (in); 1091 1092 hold = input_line_pointer; 1093 input_line_pointer = in->ptr + idx; 1094 expression (&ex); 1095 idx = input_line_pointer - in->ptr; 1096 input_line_pointer = hold; 1097 1098 if (ex.X_op != O_constant) 1099 as_bad ("%s", emsg); 1100 1101 *val = (int) ex.X_add_number; 1102 1103 return idx; 1104} 1105