1 /* as.c - GAS main program. 2 Copyright (C) 1987-2014 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 3, or (at your option) 9 any later version. 10 11 GAS is distributed in the hope that it will be useful, but WITHOUT 12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 14 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 the Free 18 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 19 02110-1301, USA. */ 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 bugs 27 28 : initialisers 29 Since no-one else says they will support them in future: I 30 don't support them now. */ 31 32 #define COMMON 33 34 #include "as.h" 35 #include "subsegs.h" 36 #include "output-file.h" 37 #include "sb.h" 38 #include "macro.h" 39 #include "dwarf2dbg.h" 40 #include "dw2gencfi.h" 41 #include "bfdver.h" 42 43 #ifdef HAVE_ITBL_CPU 44 #include "itbl-ops.h" 45 #else 46 #define itbl_init() 47 #endif 48 49 #ifdef HAVE_SBRK 50 #ifdef NEED_DECLARATION_SBRK 51 extern void *sbrk (); 52 #endif 53 #endif 54 55 #ifdef USING_CGEN 56 /* Perform any cgen specific initialisation for gas. */ 57 extern void gas_cgen_begin (void); 58 #endif 59 60 /* We build a list of defsyms as we read the options, and then define 61 them after we have initialized everything. */ 62 struct defsym_list 63 { 64 struct defsym_list *next; 65 char *name; 66 valueT value; 67 }; 68 69 70 /* True if a listing is wanted. */ 71 int listing; 72 73 /* Type of debugging to generate. */ 74 enum debug_info_type debug_type = DEBUG_UNSPECIFIED; 75 int use_gnu_debug_info_extensions = 0; 76 77 #ifndef MD_DEBUG_FORMAT_SELECTOR 78 #define MD_DEBUG_FORMAT_SELECTOR NULL 79 #endif 80 static enum debug_info_type (*md_debug_format_selector) (int *) = MD_DEBUG_FORMAT_SELECTOR; 81 82 /* Maximum level of macro nesting. */ 83 int max_macro_nest = 100; 84 85 /* argv[0] */ 86 static char * myname; 87 88 /* The default obstack chunk size. If we set this to zero, the 89 obstack code will use whatever will fit in a 4096 byte block. */ 90 int chunksize = 0; 91 92 /* To monitor memory allocation more effectively, make this non-zero. 93 Then the chunk sizes for gas and bfd will be reduced. */ 94 int debug_memory = 0; 95 96 /* Enable verbose mode. */ 97 int verbose = 0; 98 99 /* Enable incbin directive. */ 100 int allow_incbin_directive = 1; 101 102 /* Keep the output file. */ 103 static int keep_it = 0; 104 105 segT reg_section; 106 segT expr_section; 107 segT text_section; 108 segT data_section; 109 segT bss_section; 110 111 /* Name of listing file. */ 112 static char *listing_filename = NULL; 113 114 static struct defsym_list *defsyms; 115 116 #ifdef HAVE_ITBL_CPU 117 /* Keep a record of the itbl files we read in. */ 118 struct itbl_file_list 119 { 120 struct itbl_file_list *next; 121 char *name; 122 }; 123 static struct itbl_file_list *itbl_files; 124 #endif 125 126 static long start_time; 127 #ifdef HAVE_SBRK 128 char *start_sbrk; 129 #endif 130 131 static int flag_macro_alternate; 132 133 134 #ifdef USE_EMULATIONS 136 #define EMULATION_ENVIRON "AS_EMULATION" 137 138 extern struct emulation mipsbelf, mipslelf, mipself; 139 extern struct emulation i386coff, i386elf, i386aout; 140 extern struct emulation crisaout, criself; 141 142 static struct emulation *const emulations[] = { EMULATIONS }; 143 static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]); 144 145 static void 146 select_emulation_mode (int argc, char **argv) 147 { 148 int i; 149 char *p, *em = 0; 150 151 for (i = 1; i < argc; i++) 152 if (!strncmp ("--em", argv[i], 4)) 153 break; 154 155 if (i == argc) 156 goto do_default; 157 158 p = strchr (argv[i], '='); 159 if (p) 160 p++; 161 else 162 p = argv[i + 1]; 163 164 if (!p || !*p) 165 as_fatal (_("missing emulation mode name")); 166 em = p; 167 168 do_default: 169 if (em == 0) 170 em = getenv (EMULATION_ENVIRON); 171 if (em == 0) 172 em = DEFAULT_EMULATION; 173 174 if (em) 175 { 176 for (i = 0; i < n_emulations; i++) 177 if (!strcmp (emulations[i]->name, em)) 178 break; 179 if (i == n_emulations) 180 as_fatal (_("unrecognized emulation name `%s'"), em); 181 this_emulation = emulations[i]; 182 } 183 else 184 this_emulation = emulations[0]; 185 186 this_emulation->init (); 187 } 188 189 const char * 190 default_emul_bfd_name (void) 191 { 192 abort (); 193 return NULL; 194 } 195 196 void 197 common_emul_init (void) 198 { 199 this_format = this_emulation->format; 200 201 if (this_emulation->leading_underscore == 2) 202 this_emulation->leading_underscore = this_format->dfl_leading_underscore; 203 204 if (this_emulation->default_endian != 2) 205 target_big_endian = this_emulation->default_endian; 206 207 if (this_emulation->fake_label_name == 0) 208 { 209 if (this_emulation->leading_underscore) 210 this_emulation->fake_label_name = "L0\001"; 211 else 212 /* What other parameters should we test? */ 213 this_emulation->fake_label_name = ".L0\001"; 214 } 215 } 216 #endif 217 218 void 219 print_version_id (void) 220 { 221 static int printed; 222 223 if (printed) 224 return; 225 printed = 1; 226 227 fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s\n"), 228 VERSION, TARGET_ALIAS, BFD_VERSION_STRING); 229 } 230 231 static void 232 show_usage (FILE * stream) 233 { 234 fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname); 235 236 fprintf (stream, _("\ 237 Options:\n\ 238 -a[sub-option...] turn on listings\n\ 239 Sub-options [default hls]:\n\ 240 c omit false conditionals\n\ 241 d omit debugging directives\n\ 242 g include general info\n\ 243 h include high-level source\n\ 244 l include assembly\n\ 245 m include macro expansions\n\ 246 n omit forms processing\n\ 247 s include symbols\n\ 248 =FILE list to FILE (must be last sub-option)\n")); 249 250 fprintf (stream, _("\ 251 --alternate initially turn on alternate macro syntax\n")); 252 #ifdef HAVE_ZLIB_H 253 fprintf (stream, _("\ 254 --compress-debug-sections\n\ 255 compress DWARF debug sections using zlib\n")); 256 fprintf (stream, _("\ 257 --nocompress-debug-sections\n\ 258 don't compress DWARF debug sections\n")); 259 #endif /* HAVE_ZLIB_H */ 260 fprintf (stream, _("\ 261 -D produce assembler debugging messages\n")); 262 fprintf (stream, _("\ 263 --debug-prefix-map OLD=NEW\n\ 264 map OLD to NEW in debug information\n")); 265 fprintf (stream, _("\ 266 --defsym SYM=VAL define symbol SYM to given value\n")); 267 #ifdef USE_EMULATIONS 268 { 269 int i; 270 char *def_em; 271 272 fprintf (stream, "\ 273 --em=["); 274 for (i = 0; i < n_emulations - 1; i++) 275 fprintf (stream, "%s | ", emulations[i]->name); 276 fprintf (stream, "%s]\n", emulations[i]->name); 277 278 def_em = getenv (EMULATION_ENVIRON); 279 if (!def_em) 280 def_em = DEFAULT_EMULATION; 281 fprintf (stream, _("\ 282 emulate output (default %s)\n"), def_em); 283 } 284 #endif 285 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF 286 fprintf (stream, _("\ 287 --execstack require executable stack for this object\n")); 288 fprintf (stream, _("\ 289 --noexecstack don't require executable stack for this object\n")); 290 fprintf (stream, _("\ 291 --size-check=[error|warning]\n\ 292 ELF .size directive check (default --size-check=error)\n")); 293 #endif 294 fprintf (stream, _("\ 295 -f skip whitespace and comment preprocessing\n")); 296 fprintf (stream, _("\ 297 -g --gen-debug generate debugging information\n")); 298 fprintf (stream, _("\ 299 --gstabs generate STABS debugging information\n")); 300 fprintf (stream, _("\ 301 --gstabs+ generate STABS debug info with GNU extensions\n")); 302 fprintf (stream, _("\ 303 --gdwarf-2 generate DWARF2 debugging information\n")); 304 fprintf (stream, _("\ 305 --gdwarf-sections generate per-function section names for DWARF line information\n")); 306 fprintf (stream, _("\ 307 --hash-size=<value> set the hash table size close to <value>\n")); 308 fprintf (stream, _("\ 309 --help show this message and exit\n")); 310 fprintf (stream, _("\ 311 --target-help show target specific options\n")); 312 fprintf (stream, _("\ 313 -I DIR add DIR to search list for .include directives\n")); 314 fprintf (stream, _("\ 315 -J don't warn about signed overflow\n")); 316 fprintf (stream, _("\ 317 -K warn when differences altered for long displacements\n")); 318 fprintf (stream, _("\ 319 -L,--keep-locals keep local symbols (e.g. starting with `L')\n")); 320 fprintf (stream, _("\ 321 -M,--mri assemble in MRI compatibility mode\n")); 322 fprintf (stream, _("\ 323 --MD FILE write dependency information in FILE (default none)\n")); 324 fprintf (stream, _("\ 325 -nocpp ignored\n")); 326 fprintf (stream, _("\ 327 -o OBJFILE name the object-file output OBJFILE (default a.out)\n")); 328 fprintf (stream, _("\ 329 -R fold data section into text section\n")); 330 fprintf (stream, _("\ 331 --reduce-memory-overheads \n\ 332 prefer smaller memory use at the cost of longer\n\ 333 assembly times\n")); 334 fprintf (stream, _("\ 335 --statistics print various measured statistics from execution\n")); 336 fprintf (stream, _("\ 337 --strip-local-absolute strip local absolute symbols\n")); 338 fprintf (stream, _("\ 339 --traditional-format Use same format as native assembler when possible\n")); 340 fprintf (stream, _("\ 341 --version print assembler version number and exit\n")); 342 fprintf (stream, _("\ 343 -W --no-warn suppress warnings\n")); 344 fprintf (stream, _("\ 345 --warn don't suppress warnings\n")); 346 fprintf (stream, _("\ 347 --fatal-warnings treat warnings as errors\n")); 348 #ifdef HAVE_ITBL_CPU 349 fprintf (stream, _("\ 350 --itbl INSTTBL extend instruction set to include instructions\n\ 351 matching the specifications defined in file INSTTBL\n")); 352 #endif 353 fprintf (stream, _("\ 354 -w ignored\n")); 355 fprintf (stream, _("\ 356 -X ignored\n")); 357 fprintf (stream, _("\ 358 -Z generate object file even after errors\n")); 359 fprintf (stream, _("\ 360 --listing-lhs-width set the width in words of the output data column of\n\ 361 the listing\n")); 362 fprintf (stream, _("\ 363 --listing-lhs-width2 set the width in words of the continuation lines\n\ 364 of the output data column; ignored if smaller than\n\ 365 the width of the first line\n")); 366 fprintf (stream, _("\ 367 --listing-rhs-width set the max width in characters of the lines from\n\ 368 the source file\n")); 369 fprintf (stream, _("\ 370 --listing-cont-lines set the maximum number of continuation lines used\n\ 371 for the output data column of the listing\n")); 372 fprintf (stream, _("\ 373 @FILE read options from FILE\n")); 374 375 md_show_usage (stream); 376 377 fputc ('\n', stream); 378 379 if (REPORT_BUGS_TO[0] && stream == stdout) 380 fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO); 381 } 382 383 /* Since it is easy to do here we interpret the special arg "-" 384 to mean "use stdin" and we set that argv[] pointing to "". 385 After we have munged argv[], the only things left are source file 386 name(s) and ""(s) denoting stdin. These file names are used 387 (perhaps more than once) later. 388 389 check for new machine-dep cmdline options in 390 md_parse_option definitions in config/tc-*.c. */ 391 392 static void 393 parse_args (int * pargc, char *** pargv) 394 { 395 int old_argc; 396 int new_argc; 397 char ** old_argv; 398 char ** new_argv; 399 /* Starting the short option string with '-' is for programs that 400 expect options and other ARGV-elements in any order and that care about 401 the ordering of the two. We describe each non-option ARGV-element 402 as if it were the argument of an option with character code 1. */ 403 char *shortopts; 404 extern const char *md_shortopts; 405 static const char std_shortopts[] = 406 { 407 '-', 'J', 408 #ifndef WORKING_DOT_WORD 409 /* -K is not meaningful if .word is not being hacked. */ 410 'K', 411 #endif 412 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':', 413 #ifndef VMS 414 /* -v takes an argument on VMS, so we don't make it a generic 415 option. */ 416 'v', 417 #endif 418 'w', 'X', 419 #ifdef HAVE_ITBL_CPU 420 /* New option for extending instruction set (see also --itbl below). */ 421 't', ':', 422 #endif 423 '\0' 424 }; 425 struct option *longopts; 426 extern struct option md_longopts[]; 427 extern size_t md_longopts_size; 428 /* Codes used for the long options with no short synonyms. */ 429 enum option_values 430 { 431 OPTION_HELP = OPTION_STD_BASE, 432 OPTION_NOCPP, 433 OPTION_STATISTICS, 434 OPTION_VERSION, 435 OPTION_DUMPCONFIG, 436 OPTION_VERBOSE, 437 OPTION_EMULATION, 438 OPTION_DEBUG_PREFIX_MAP, 439 OPTION_DEFSYM, 440 OPTION_LISTING_LHS_WIDTH, 441 OPTION_LISTING_LHS_WIDTH2, 442 OPTION_LISTING_RHS_WIDTH, 443 OPTION_LISTING_CONT_LINES, 444 OPTION_DEPFILE, 445 OPTION_GSTABS, 446 OPTION_GSTABS_PLUS, 447 OPTION_GDWARF2, 448 OPTION_GDWARF_SECTIONS, 449 OPTION_STRIP_LOCAL_ABSOLUTE, 450 OPTION_TRADITIONAL_FORMAT, 451 OPTION_WARN, 452 OPTION_TARGET_HELP, 453 OPTION_EXECSTACK, 454 OPTION_NOEXECSTACK, 455 OPTION_SIZE_CHECK, 456 OPTION_ALTERNATE, 457 OPTION_AL, 458 OPTION_HASH_TABLE_SIZE, 459 OPTION_REDUCE_MEMORY_OVERHEADS, 460 OPTION_WARN_FATAL, 461 OPTION_COMPRESS_DEBUG, 462 OPTION_NOCOMPRESS_DEBUG, 463 OPTION_ALLOW_INCBIN, 464 OPTION_NOALLOW_INCBIN 465 /* When you add options here, check that they do 466 not collide with OPTION_MD_BASE. See as.h. */ 467 }; 468 469 static const struct option std_longopts[] = 470 { 471 /* Note: commas are placed at the start of the line rather than 472 the end of the preceding line so that it is simpler to 473 selectively add and remove lines from this list. */ 474 {"alternate", no_argument, NULL, OPTION_ALTERNATE} 475 /* The entry for "a" is here to prevent getopt_long_only() from 476 considering that -a is an abbreviation for --alternate. This is 477 necessary because -a=<FILE> is a valid switch but getopt would 478 normally reject it since --alternate does not take an argument. */ 479 ,{"a", optional_argument, NULL, 'a'} 480 /* Handle -al=<FILE>. */ 481 ,{"al", optional_argument, NULL, OPTION_AL} 482 ,{"allow-incbin", optional_argument, NULL, OPTION_ALLOW_INCBIN} 483 ,{"noallow-incbin", optional_argument, NULL, OPTION_NOALLOW_INCBIN} 484 ,{"compress-debug-sections", no_argument, NULL, OPTION_COMPRESS_DEBUG} 485 ,{"nocompress-debug-sections", no_argument, NULL, OPTION_NOCOMPRESS_DEBUG} 486 ,{"debug-prefix-map", required_argument, NULL, OPTION_DEBUG_PREFIX_MAP} 487 ,{"defsym", required_argument, NULL, OPTION_DEFSYM} 488 ,{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG} 489 ,{"emulation", required_argument, NULL, OPTION_EMULATION} 490 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF 491 ,{"execstack", no_argument, NULL, OPTION_EXECSTACK} 492 ,{"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK} 493 ,{"size-check", required_argument, NULL, OPTION_SIZE_CHECK} 494 #endif 495 ,{"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL} 496 ,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF2} 497 /* GCC uses --gdwarf-2 but GAS uses to use --gdwarf2, 498 so we keep it here for backwards compatibility. */ 499 ,{"gdwarf2", no_argument, NULL, OPTION_GDWARF2} 500 ,{"gdwarf-sections", no_argument, NULL, OPTION_GDWARF_SECTIONS} 501 ,{"gen-debug", no_argument, NULL, 'g'} 502 ,{"gstabs", no_argument, NULL, OPTION_GSTABS} 503 ,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS} 504 ,{"hash-size", required_argument, NULL, OPTION_HASH_TABLE_SIZE} 505 ,{"help", no_argument, NULL, OPTION_HELP} 506 #ifdef HAVE_ITBL_CPU 507 /* New option for extending instruction set (see also -t above). 508 The "-t file" or "--itbl file" option extends the basic set of 509 valid instructions by reading "file", a text file containing a 510 list of instruction formats. The additional opcodes and their 511 formats are added to the built-in set of instructions, and 512 mnemonics for new registers may also be defined. */ 513 ,{"itbl", required_argument, NULL, 't'} 514 #endif 515 /* getopt allows abbreviations, so we do this to stop it from 516 treating -k as an abbreviation for --keep-locals. Some 517 ports use -k to enable PIC assembly. */ 518 ,{"keep-locals", no_argument, NULL, 'L'} 519 ,{"keep-locals", no_argument, NULL, 'L'} 520 ,{"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH} 521 ,{"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2} 522 ,{"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH} 523 ,{"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES} 524 ,{"MD", required_argument, NULL, OPTION_DEPFILE} 525 ,{"mri", no_argument, NULL, 'M'} 526 ,{"nocpp", no_argument, NULL, OPTION_NOCPP} 527 ,{"no-warn", no_argument, NULL, 'W'} 528 ,{"reduce-memory-overheads", no_argument, NULL, OPTION_REDUCE_MEMORY_OVERHEADS} 529 ,{"statistics", no_argument, NULL, OPTION_STATISTICS} 530 ,{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE} 531 ,{"version", no_argument, NULL, OPTION_VERSION} 532 ,{"verbose", no_argument, NULL, OPTION_VERBOSE} 533 ,{"target-help", no_argument, NULL, OPTION_TARGET_HELP} 534 ,{"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT} 535 ,{"warn", no_argument, NULL, OPTION_WARN} 536 }; 537 538 /* Construct the option lists from the standard list and the target 539 dependent list. Include space for an extra NULL option and 540 always NULL terminate. */ 541 shortopts = concat (std_shortopts, md_shortopts, (char *) NULL); 542 longopts = (struct option *) xmalloc (sizeof (std_longopts) 543 + md_longopts_size + sizeof (struct option)); 544 memcpy (longopts, std_longopts, sizeof (std_longopts)); 545 memcpy (((char *) longopts) + sizeof (std_longopts), md_longopts, md_longopts_size); 546 memset (((char *) longopts) + sizeof (std_longopts) + md_longopts_size, 547 0, sizeof (struct option)); 548 549 /* Make a local copy of the old argv. */ 550 old_argc = *pargc; 551 old_argv = *pargv; 552 553 /* Initialize a new argv that contains no options. */ 554 new_argv = (char **) xmalloc (sizeof (char *) * (old_argc + 1)); 555 new_argv[0] = old_argv[0]; 556 new_argc = 1; 557 new_argv[new_argc] = NULL; 558 559 while (1) 560 { 561 /* getopt_long_only is like getopt_long, but '-' as well as '--' can 562 indicate a long option. */ 563 int longind; 564 int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts, 565 &longind); 566 567 if (optc == -1) 568 break; 569 570 switch (optc) 571 { 572 default: 573 /* md_parse_option should return 1 if it recognizes optc, 574 0 if not. */ 575 if (md_parse_option (optc, optarg) != 0) 576 break; 577 /* `-v' isn't included in the general short_opts list, so check for 578 it explicitly here before deciding we've gotten a bad argument. */ 579 if (optc == 'v') 580 { 581 #ifdef VMS 582 /* Telling getopt to treat -v's value as optional can result 583 in it picking up a following filename argument here. The 584 VMS code in md_parse_option can return 0 in that case, 585 but it has no way of pushing the filename argument back. */ 586 if (optarg && *optarg) 587 new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL; 588 else 589 #else 590 case 'v': 591 #endif 592 case OPTION_VERBOSE: 593 print_version_id (); 594 verbose = 1; 595 break; 596 } 597 else 598 as_bad (_("unrecognized option -%c%s"), optc, optarg ? optarg : ""); 599 /* Fall through. */ 600 601 case '?': 602 exit (EXIT_FAILURE); 603 604 case 1: /* File name. */ 605 if (!strcmp (optarg, "-")) 606 optarg = ""; 607 new_argv[new_argc++] = optarg; 608 new_argv[new_argc] = NULL; 609 break; 610 611 case OPTION_TARGET_HELP: 612 md_show_usage (stdout); 613 exit (EXIT_SUCCESS); 614 615 case OPTION_HELP: 616 show_usage (stdout); 617 exit (EXIT_SUCCESS); 618 619 case OPTION_NOCPP: 620 break; 621 622 case OPTION_STATISTICS: 623 flag_print_statistics = 1; 624 break; 625 626 case OPTION_STRIP_LOCAL_ABSOLUTE: 627 flag_strip_local_absolute = 1; 628 break; 629 630 case OPTION_TRADITIONAL_FORMAT: 631 flag_traditional_format = 1; 632 break; 633 634 case OPTION_VERSION: 635 /* This output is intended to follow the GNU standards document. */ 636 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING); 637 printf (_("Copyright (C) 2014 Free Software Foundation, Inc.\n")); 638 printf (_("\ 639 This program is free software; you may redistribute it under the terms of\n\ 640 the GNU General Public License version 3 or later.\n\ 641 This program has absolutely no warranty.\n")); 642 printf (_("This assembler was configured for a target of `%s'.\n"), 643 TARGET_ALIAS); 644 exit (EXIT_SUCCESS); 645 646 case OPTION_EMULATION: 647 #ifdef USE_EMULATIONS 648 if (strcmp (optarg, this_emulation->name)) 649 as_fatal (_("multiple emulation names specified")); 650 #else 651 as_fatal (_("emulations not handled in this configuration")); 652 #endif 653 break; 654 655 case OPTION_DUMPCONFIG: 656 fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS); 657 fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL); 658 fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU); 659 #ifdef TARGET_OBJ_FORMAT 660 fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT); 661 #endif 662 #ifdef TARGET_FORMAT 663 fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT); 664 #endif 665 exit (EXIT_SUCCESS); 666 667 case OPTION_COMPRESS_DEBUG: 668 #ifdef HAVE_ZLIB_H 669 flag_compress_debug = 1; 670 #else 671 as_warn (_("cannot compress debug sections (zlib not installed)")); 672 #endif /* HAVE_ZLIB_H */ 673 break; 674 675 case OPTION_NOCOMPRESS_DEBUG: 676 flag_compress_debug = 0; 677 break; 678 679 case OPTION_ALLOW_INCBIN: 680 allow_incbin_directive = 1; 681 break; 682 683 case OPTION_NOALLOW_INCBIN: 684 allow_incbin_directive = 0; 685 break; 686 687 case OPTION_DEBUG_PREFIX_MAP: 688 add_debug_prefix_map (optarg); 689 break; 690 691 case OPTION_DEFSYM: 692 { 693 char *s; 694 valueT i; 695 struct defsym_list *n; 696 697 for (s = optarg; *s != '\0' && *s != '='; s++) 698 ; 699 if (*s == '\0') 700 as_fatal (_("bad defsym; format is --defsym name=value")); 701 *s++ = '\0'; 702 i = bfd_scan_vma (s, (const char **) NULL, 0); 703 n = (struct defsym_list *) xmalloc (sizeof *n); 704 n->next = defsyms; 705 n->name = optarg; 706 n->value = i; 707 defsyms = n; 708 } 709 break; 710 711 #ifdef HAVE_ITBL_CPU 712 case 't': 713 { 714 /* optarg is the name of the file containing the instruction 715 formats, opcodes, register names, etc. */ 716 struct itbl_file_list *n; 717 718 if (optarg == NULL) 719 { 720 as_warn (_("no file name following -t option")); 721 break; 722 } 723 724 n = xmalloc (sizeof * n); 725 n->next = itbl_files; 726 n->name = optarg; 727 itbl_files = n; 728 729 /* Parse the file and add the new instructions to our internal 730 table. If multiple instruction tables are specified, the 731 information from this table gets appended onto the existing 732 internal table. */ 733 itbl_files->name = xstrdup (optarg); 734 if (itbl_parse (itbl_files->name) != 0) 735 as_fatal (_("failed to read instruction table %s\n"), 736 itbl_files->name); 737 } 738 break; 739 #endif 740 741 case OPTION_DEPFILE: 742 start_dependencies (optarg); 743 break; 744 745 case 'g': 746 /* Some backends, eg Alpha and Mips, use the -g switch for their 747 own purposes. So we check here for an explicit -g and allow 748 the backend to decide if it wants to process it. */ 749 if ( old_argv[optind - 1][1] == 'g' 750 && md_parse_option (optc, optarg)) 751 continue; 752 753 if (md_debug_format_selector) 754 debug_type = md_debug_format_selector (& use_gnu_debug_info_extensions); 755 else if (IS_ELF) 756 debug_type = DEBUG_DWARF2; 757 else 758 debug_type = DEBUG_STABS; 759 break; 760 761 case OPTION_GSTABS_PLUS: 762 use_gnu_debug_info_extensions = 1; 763 /* Fall through. */ 764 case OPTION_GSTABS: 765 debug_type = DEBUG_STABS; 766 break; 767 768 case OPTION_GDWARF2: 769 debug_type = DEBUG_DWARF2; 770 break; 771 772 case OPTION_GDWARF_SECTIONS: 773 flag_dwarf_sections = TRUE; 774 break; 775 776 case 'J': 777 flag_signed_overflow_ok = 1; 778 break; 779 780 #ifndef WORKING_DOT_WORD 781 case 'K': 782 flag_warn_displacement = 1; 783 break; 784 #endif 785 case 'L': 786 flag_keep_locals = 1; 787 break; 788 789 case OPTION_LISTING_LHS_WIDTH: 790 listing_lhs_width = atoi (optarg); 791 if (listing_lhs_width_second < listing_lhs_width) 792 listing_lhs_width_second = listing_lhs_width; 793 break; 794 case OPTION_LISTING_LHS_WIDTH2: 795 { 796 int tmp = atoi (optarg); 797 798 if (tmp > listing_lhs_width) 799 listing_lhs_width_second = tmp; 800 } 801 break; 802 case OPTION_LISTING_RHS_WIDTH: 803 listing_rhs_width = atoi (optarg); 804 break; 805 case OPTION_LISTING_CONT_LINES: 806 listing_lhs_cont_lines = atoi (optarg); 807 break; 808 809 case 'M': 810 flag_mri = 1; 811 #ifdef TC_M68K 812 flag_m68k_mri = 1; 813 #endif 814 break; 815 816 case 'R': 817 flag_readonly_data_in_text = 1; 818 break; 819 820 case 'W': 821 flag_no_warnings = 1; 822 break; 823 824 case OPTION_WARN: 825 flag_no_warnings = 0; 826 flag_fatal_warnings = 0; 827 break; 828 829 case OPTION_WARN_FATAL: 830 flag_no_warnings = 0; 831 flag_fatal_warnings = 1; 832 break; 833 834 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF 835 case OPTION_EXECSTACK: 836 flag_execstack = 1; 837 flag_noexecstack = 0; 838 break; 839 840 case OPTION_NOEXECSTACK: 841 flag_noexecstack = 1; 842 flag_execstack = 0; 843 break; 844 845 case OPTION_SIZE_CHECK: 846 if (strcasecmp (optarg, "error") == 0) 847 flag_size_check = size_check_error; 848 else if (strcasecmp (optarg, "warning") == 0) 849 flag_size_check = size_check_warning; 850 else 851 as_fatal (_("Invalid --size-check= option: `%s'"), optarg); 852 break; 853 #endif 854 case 'Z': 855 flag_always_generate_output = 1; 856 break; 857 858 case OPTION_AL: 859 listing |= LISTING_LISTING; 860 if (optarg) 861 listing_filename = xstrdup (optarg); 862 break; 863 864 case OPTION_ALTERNATE: 865 optarg = old_argv [optind - 1]; 866 while (* optarg == '-') 867 optarg ++; 868 869 if (strcmp (optarg, "alternate") == 0) 870 { 871 flag_macro_alternate = 1; 872 break; 873 } 874 optarg ++; 875 /* Fall through. */ 876 877 case 'a': 878 if (optarg) 879 { 880 if (optarg != old_argv[optind] && optarg[-1] == '=') 881 --optarg; 882 883 if (md_parse_option (optc, optarg) != 0) 884 break; 885 886 while (*optarg) 887 { 888 switch (*optarg) 889 { 890 case 'c': 891 listing |= LISTING_NOCOND; 892 break; 893 case 'd': 894 listing |= LISTING_NODEBUG; 895 break; 896 case 'g': 897 listing |= LISTING_GENERAL; 898 break; 899 case 'h': 900 listing |= LISTING_HLL; 901 break; 902 case 'l': 903 listing |= LISTING_LISTING; 904 break; 905 case 'm': 906 listing |= LISTING_MACEXP; 907 break; 908 case 'n': 909 listing |= LISTING_NOFORM; 910 break; 911 case 's': 912 listing |= LISTING_SYMBOLS; 913 break; 914 case '=': 915 listing_filename = xstrdup (optarg + 1); 916 optarg += strlen (listing_filename); 917 break; 918 default: 919 as_fatal (_("invalid listing option `%c'"), *optarg); 920 break; 921 } 922 optarg++; 923 } 924 } 925 if (!listing) 926 listing = LISTING_DEFAULT; 927 break; 928 929 case 'D': 930 /* DEBUG is implemented: it debugs different 931 things from other people's assemblers. */ 932 flag_debug = 1; 933 break; 934 935 case 'f': 936 flag_no_comments = 1; 937 break; 938 939 case 'I': 940 { /* Include file directory. */ 941 char *temp = xstrdup (optarg); 942 943 add_include_dir (temp); 944 break; 945 } 946 947 case 'o': 948 out_file_name = xstrdup (optarg); 949 break; 950 951 case 'w': 952 break; 953 954 case 'X': 955 /* -X means treat warnings as errors. */ 956 break; 957 958 case OPTION_REDUCE_MEMORY_OVERHEADS: 959 /* The only change we make at the moment is to reduce 960 the size of the hash tables that we use. */ 961 set_gas_hash_table_size (4051); 962 break; 963 964 case OPTION_HASH_TABLE_SIZE: 965 { 966 unsigned long new_size; 967 968 new_size = strtoul (optarg, NULL, 0); 969 if (new_size) 970 set_gas_hash_table_size (new_size); 971 else 972 as_fatal (_("--hash-size needs a numeric argument")); 973 break; 974 } 975 } 976 } 977 978 free (shortopts); 979 free (longopts); 980 981 *pargc = new_argc; 982 *pargv = new_argv; 983 984 #ifdef md_after_parse_args 985 md_after_parse_args (); 986 #endif 987 } 988 989 static void 990 dump_statistics (void) 991 { 992 #ifdef HAVE_SBRK 993 char *lim = (char *) sbrk (0); 994 #endif 995 long run_time = get_run_time () - start_time; 996 997 fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"), 998 myname, run_time / 1000000, run_time % 1000000); 999 #ifdef HAVE_SBRK 1000 fprintf (stderr, _("%s: data size %ld\n"), 1001 myname, (long) (lim - start_sbrk)); 1002 #endif 1003 1004 subsegs_print_statistics (stderr); 1005 write_print_statistics (stderr); 1006 symbol_print_statistics (stderr); 1007 read_print_statistics (stderr); 1008 1009 #ifdef tc_print_statistics 1010 tc_print_statistics (stderr); 1011 #endif 1012 1013 #ifdef obj_print_statistics 1014 obj_print_statistics (stderr); 1015 #endif 1016 } 1017 1018 static void 1019 close_output_file (void) 1020 { 1021 output_file_close (out_file_name); 1022 if (!keep_it) 1023 unlink_if_ordinary (out_file_name); 1024 } 1025 1026 /* The interface between the macro code and gas expression handling. */ 1027 1028 static size_t 1029 macro_expr (const char *emsg, size_t idx, sb *in, offsetT *val) 1030 { 1031 char *hold; 1032 expressionS ex; 1033 1034 sb_terminate (in); 1035 1036 hold = input_line_pointer; 1037 input_line_pointer = in->ptr + idx; 1038 expression_and_evaluate (&ex); 1039 idx = input_line_pointer - in->ptr; 1040 input_line_pointer = hold; 1041 1042 if (ex.X_op != O_constant) 1043 as_bad ("%s", emsg); 1044 1045 *val = ex.X_add_number; 1046 1047 return idx; 1048 } 1049 1050 /* Here to attempt 1 pass over each input file. 1052 We scan argv[*] looking for filenames or exactly "" which is 1053 shorthand for stdin. Any argv that is NULL is not a file-name. 1054 We set need_pass_2 TRUE if, after this, we still have unresolved 1055 expressions of the form (unknown value)+-(unknown value). 1056 1057 Note the un*x semantics: there is only 1 logical input file, but it 1058 may be a catenation of many 'physical' input files. */ 1059 1060 static void 1061 perform_an_assembly_pass (int argc, char ** argv) 1062 { 1063 int saw_a_file = 0; 1064 #ifndef OBJ_MACH_O 1065 flagword applicable; 1066 #endif 1067 1068 need_pass_2 = 0; 1069 1070 #ifndef OBJ_MACH_O 1071 /* Create the standard sections, and those the assembler uses 1072 internally. */ 1073 text_section = subseg_new (TEXT_SECTION_NAME, 0); 1074 data_section = subseg_new (DATA_SECTION_NAME, 0); 1075 bss_section = subseg_new (BSS_SECTION_NAME, 0); 1076 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed 1077 to have relocs, otherwise we don't find out in time. */ 1078 applicable = bfd_applicable_section_flags (stdoutput); 1079 bfd_set_section_flags (stdoutput, text_section, 1080 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC 1081 | SEC_CODE | SEC_READONLY)); 1082 bfd_set_section_flags (stdoutput, data_section, 1083 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC 1084 | SEC_DATA)); 1085 bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC); 1086 seg_info (bss_section)->bss = 1; 1087 #endif 1088 subseg_new (BFD_ABS_SECTION_NAME, 0); 1089 subseg_new (BFD_UND_SECTION_NAME, 0); 1090 reg_section = subseg_new ("*GAS `reg' section*", 0); 1091 expr_section = subseg_new ("*GAS `expr' section*", 0); 1092 1093 #ifndef OBJ_MACH_O 1094 subseg_set (text_section, 0); 1095 #endif 1096 1097 /* This may add symbol table entries, which requires having an open BFD, 1098 and sections already created. */ 1099 md_begin (); 1100 1101 #ifdef USING_CGEN 1102 gas_cgen_begin (); 1103 #endif 1104 #ifdef obj_begin 1105 obj_begin (); 1106 #endif 1107 1108 /* Skip argv[0]. */ 1109 argv++; 1110 argc--; 1111 1112 while (argc--) 1113 { 1114 if (*argv) 1115 { /* Is it a file-name argument? */ 1116 PROGRESS (1); 1117 saw_a_file++; 1118 /* argv->"" if stdin desired, else->filename. */ 1119 read_a_source_file (*argv); 1120 } 1121 argv++; /* Completed that argv. */ 1122 } 1123 if (!saw_a_file) 1124 read_a_source_file (""); 1125 } 1126 1127 1129 int 1130 main (int argc, char ** argv) 1131 { 1132 char ** argv_orig = argv; 1133 1134 int macro_strip_at; 1135 1136 start_time = get_run_time (); 1137 #ifdef HAVE_SBRK 1138 start_sbrk = (char *) sbrk (0); 1139 #endif 1140 1141 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) 1142 setlocale (LC_MESSAGES, ""); 1143 #endif 1144 #if defined (HAVE_SETLOCALE) 1145 setlocale (LC_CTYPE, ""); 1146 #endif 1147 bindtextdomain (PACKAGE, LOCALEDIR); 1148 textdomain (PACKAGE); 1149 1150 if (debug_memory) 1151 chunksize = 64; 1152 1153 #ifdef HOST_SPECIAL_INIT 1154 HOST_SPECIAL_INIT (argc, argv); 1155 #endif 1156 1157 myname = argv[0]; 1158 xmalloc_set_program_name (myname); 1159 1160 expandargv (&argc, &argv); 1161 1162 START_PROGRESS (myname, 0); 1163 1164 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME 1165 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out" 1166 #endif 1167 1168 out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME; 1169 1170 hex_init (); 1171 bfd_init (); 1172 bfd_set_error_program_name (myname); 1173 1174 #ifdef USE_EMULATIONS 1175 select_emulation_mode (argc, argv); 1176 #endif 1177 1178 PROGRESS (1); 1179 /* Call parse_args before any of the init/begin functions 1180 so that switches like --hash-size can be honored. */ 1181 parse_args (&argc, &argv); 1182 symbol_begin (); 1183 frag_init (); 1184 subsegs_begin (); 1185 read_begin (); 1186 input_scrub_begin (); 1187 expr_begin (); 1188 1189 /* It has to be called after dump_statistics (). */ 1190 xatexit (close_output_file); 1191 1192 if (flag_print_statistics) 1193 xatexit (dump_statistics); 1194 1195 macro_strip_at = 0; 1196 #ifdef TC_I960 1197 macro_strip_at = flag_mri; 1198 #endif 1199 1200 macro_init (flag_macro_alternate, flag_mri, macro_strip_at, macro_expr); 1201 1202 PROGRESS (1); 1203 1204 output_file_create (out_file_name); 1205 gas_assert (stdoutput != 0); 1206 1207 dot_symbol_init (); 1208 1209 #ifdef tc_init_after_args 1210 tc_init_after_args (); 1211 #endif 1212 1213 itbl_init (); 1214 1215 dwarf2_init (); 1216 1217 local_symbol_make (".gasversion.", absolute_section, 1218 BFD_VERSION / 10000UL, &predefined_address_frag); 1219 1220 /* Now that we have fully initialized, and have created the output 1221 file, define any symbols requested by --defsym command line 1222 arguments. */ 1223 while (defsyms != NULL) 1224 { 1225 symbolS *sym; 1226 struct defsym_list *next; 1227 1228 sym = symbol_new (defsyms->name, absolute_section, defsyms->value, 1229 &zero_address_frag); 1230 /* Make symbols defined on the command line volatile, so that they 1231 can be redefined inside a source file. This makes this assembler's 1232 behaviour compatible with earlier versions, but it may not be 1233 completely intuitive. */ 1234 S_SET_VOLATILE (sym); 1235 symbol_table_insert (sym); 1236 next = defsyms->next; 1237 free (defsyms); 1238 defsyms = next; 1239 } 1240 1241 PROGRESS (1); 1242 1243 /* Assemble it. */ 1244 perform_an_assembly_pass (argc, argv); 1245 1246 cond_finish_check (-1); 1247 1248 #ifdef md_end 1249 md_end (); 1250 #endif 1251 1252 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF 1253 if ((flag_execstack || flag_noexecstack) 1254 && OUTPUT_FLAVOR == bfd_target_elf_flavour) 1255 { 1256 segT gnustack; 1257 1258 gnustack = subseg_new (".note.GNU-stack", 0); 1259 bfd_set_section_flags (stdoutput, gnustack, 1260 SEC_READONLY | (flag_execstack ? SEC_CODE : 0)); 1261 1262 } 1263 #endif 1264 1265 /* If we've been collecting dwarf2 .debug_line info, either for 1266 assembly debugging or on behalf of the compiler, emit it now. */ 1267 dwarf2_finish (); 1268 1269 /* If we constructed dwarf2 .eh_frame info, either via .cfi 1270 directives from the user or by the backend, emit it now. */ 1271 cfi_finish (); 1272 1273 keep_it = 0; 1274 if (seen_at_least_1_file ()) 1275 { 1276 int n_warns, n_errs; 1277 char warn_msg[50]; 1278 char err_msg[50]; 1279 1280 write_object_file (); 1281 1282 n_warns = had_warnings (); 1283 n_errs = had_errors (); 1284 1285 if (n_warns == 1) 1286 sprintf (warn_msg, _("%d warning"), n_warns); 1287 else 1288 sprintf (warn_msg, _("%d warnings"), n_warns); 1289 if (n_errs == 1) 1290 sprintf (err_msg, _("%d error"), n_errs); 1291 else 1292 sprintf (err_msg, _("%d errors"), n_errs); 1293 1294 if (flag_fatal_warnings && n_warns != 0) 1295 { 1296 if (n_errs == 0) 1297 as_bad (_("%s, treating warnings as errors"), warn_msg); 1298 n_errs += n_warns; 1299 } 1300 1301 if (n_errs == 0) 1302 keep_it = 1; 1303 else if (flag_always_generate_output) 1304 { 1305 /* The -Z flag indicates that an object file should be generated, 1306 regardless of warnings and errors. */ 1307 keep_it = 1; 1308 fprintf (stderr, _("%s, %s, generating bad object file\n"), 1309 err_msg, warn_msg); 1310 } 1311 } 1312 1313 fflush (stderr); 1314 1315 #ifndef NO_LISTING 1316 listing_print (listing_filename, argv_orig); 1317 #endif 1318 1319 input_scrub_end (); 1320 1321 END_PROGRESS (myname); 1322 1323 /* Use xexit instead of return, because under VMS environments they 1324 may not place the same interpretation on the value given. */ 1325 if (had_errors () != 0) 1326 xexit (EXIT_FAILURE); 1327 1328 /* Only generate dependency file if assembler was successful. */ 1329 print_dependencies (); 1330 1331 xexit (EXIT_SUCCESS); 1332 } 1333
