1 /* as.c - GAS main program. 2 Copyright (C) 1987-2022 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 /* Disable code to set FAKE_LABEL_NAME in obj-multi.h, to avoid circular 35 reference. */ 36 #define INITIALIZING_EMULS 37 38 #include "as.h" 39 #include "subsegs.h" 40 #include "output-file.h" 41 #include "sb.h" 42 #include "macro.h" 43 #include "dwarf2dbg.h" 44 #include "dw2gencfi.h" 45 #include "bfdver.h" 46 #include "write.h" 47 48 #ifdef HAVE_ITBL_CPU 49 #include "itbl-ops.h" 50 #else 51 #define itbl_init() 52 #endif 53 54 #ifdef USING_CGEN 55 /* Perform any cgen specific initialisation for gas. */ 56 extern void gas_cgen_begin (void); 57 #endif 58 59 /* We build a list of defsyms as we read the options, and then define 60 them after we have initialized everything. */ 61 struct defsym_list 62 { 63 struct defsym_list *next; 64 char *name; 65 valueT value; 66 }; 67 68 69 /* True if a listing is wanted. */ 70 int listing; 71 72 /* Type of debugging to generate. */ 73 enum debug_info_type debug_type = DEBUG_UNSPECIFIED; 74 int use_gnu_debug_info_extensions = 0; 75 76 #ifndef MD_DEBUG_FORMAT_SELECTOR 77 #define MD_DEBUG_FORMAT_SELECTOR NULL 78 #endif 79 static enum debug_info_type (*md_debug_format_selector) (int *) = MD_DEBUG_FORMAT_SELECTOR; 80 81 /* Maximum level of macro nesting. */ 82 int max_macro_nest = 100; 83 84 /* argv[0] */ 85 static char * myname; 86 87 /* The default obstack chunk size. If we set this to zero, the 88 obstack code will use whatever will fit in a 4096 byte block. */ 89 int chunksize = 0; 90 91 /* To monitor memory allocation more effectively, make this non-zero. 92 Then the chunk sizes for gas and bfd will be reduced. */ 93 int debug_memory = 0; 94 95 /* Enable verbose mode. */ 96 int verbose = 0; 97 98 /* Which version of DWARF CIE to produce. This default value of -1 99 indicates that this value has not been set yet, a default value is 100 provided in dwarf2_init. A different value can also be supplied by the 101 command line flag --gdwarf-cie-version, or by a target in 102 MD_AFTER_PARSE_ARGS. */ 103 int flag_dwarf_cie_version = -1; 104 105 /* The maximum level of DWARF DEBUG information we should manufacture. 106 This defaults to 3 unless overridden by a command line option. */ 107 unsigned int dwarf_level = 3; 108 109 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF 110 int flag_use_elf_stt_common = DEFAULT_GENERATE_ELF_STT_COMMON; 111 bool flag_generate_build_notes = DEFAULT_GENERATE_BUILD_NOTES; 112 #endif 113 114 /* Keep the output file. */ 115 static int keep_it = 0; 116 117 segT reg_section; 118 segT expr_section; 119 segT text_section; 120 segT data_section; 121 segT bss_section; 122 123 /* Name of listing file. */ 124 static char *listing_filename = NULL; 125 126 static struct defsym_list *defsyms; 127 128 #ifdef HAVE_ITBL_CPU 129 /* Keep a record of the itbl files we read in. */ 130 struct itbl_file_list 131 { 132 struct itbl_file_list *next; 133 char *name; 134 }; 135 static struct itbl_file_list *itbl_files; 136 #endif 137 138 static long start_time; 139 140 static int flag_macro_alternate; 141 142 143 #ifdef USE_EMULATIONS 144 #define EMULATION_ENVIRON "AS_EMULATION" 145 146 extern struct emulation mipsbelf, mipslelf, mipself; 147 extern struct emulation i386coff, i386elf, i386aout; 148 extern struct emulation crisaout, criself; 149 150 static struct emulation *const emulations[] = { EMULATIONS }; 151 static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]); 152 153 static void 154 select_emulation_mode (int argc, char **argv) 155 { 156 int i; 157 char *p; 158 const char *em = NULL; 159 160 for (i = 1; i < argc; i++) 161 if (startswith (argv[i], "--em")) 162 break; 163 164 if (i == argc) 165 goto do_default; 166 167 p = strchr (argv[i], '='); 168 if (p) 169 p++; 170 else 171 p = argv[i + 1]; 172 173 if (!p || !*p) 174 as_fatal (_("missing emulation mode name")); 175 em = p; 176 177 do_default: 178 if (em == 0) 179 em = getenv (EMULATION_ENVIRON); 180 if (em == 0) 181 em = DEFAULT_EMULATION; 182 183 if (em) 184 { 185 for (i = 0; i < n_emulations; i++) 186 if (!strcmp (emulations[i]->name, em)) 187 break; 188 if (i == n_emulations) 189 as_fatal (_("unrecognized emulation name `%s'"), em); 190 this_emulation = emulations[i]; 191 } 192 else 193 this_emulation = emulations[0]; 194 195 this_emulation->init (); 196 } 197 198 const char * 199 default_emul_bfd_name (void) 200 { 201 abort (); 202 return NULL; 203 } 204 205 void 206 common_emul_init (void) 207 { 208 this_format = this_emulation->format; 209 210 if (this_emulation->leading_underscore == 2) 211 this_emulation->leading_underscore = this_format->dfl_leading_underscore; 212 213 if (this_emulation->default_endian != 2) 214 target_big_endian = this_emulation->default_endian; 215 216 if (this_emulation->fake_label_name == 0) 217 { 218 if (this_emulation->leading_underscore) 219 this_emulation->fake_label_name = FAKE_LABEL_NAME; 220 else 221 /* What other parameters should we test? */ 222 this_emulation->fake_label_name = "." FAKE_LABEL_NAME; 223 } 224 } 225 #endif 226 227 void 228 print_version_id (void) 229 { 230 static int printed; 231 232 if (printed) 233 return; 234 printed = 1; 235 236 fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s\n"), 237 VERSION, TARGET_ALIAS, BFD_VERSION_STRING); 238 } 239 240 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG 241 enum compressed_debug_section_type flag_compress_debug 242 = COMPRESS_DEBUG_GABI_ZLIB; 243 #endif 244 245 static void 246 show_usage (FILE * stream) 247 { 248 fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname); 249 250 fprintf (stream, _("\ 251 Options:\n\ 252 -a[sub-option...] turn on listings\n\ 253 Sub-options [default hls]:\n\ 254 c omit false conditionals\n\ 255 d omit debugging directives\n\ 256 g include general info\n\ 257 h include high-level source\n\ 258 l include assembly\n\ 259 m include macro expansions\n\ 260 n omit forms processing\n\ 261 s include symbols\n\ 262 =FILE list to FILE (must be last sub-option)\n")); 263 264 fprintf (stream, _("\ 265 --alternate initially turn on alternate macro syntax\n")); 266 #ifdef DEFAULT_FLAG_COMPRESS_DEBUG 267 fprintf (stream, _("\ 268 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\ 269 compress DWARF debug sections using zlib [default]\n")); 270 fprintf (stream, _("\ 271 --nocompress-debug-sections\n\ 272 don't compress DWARF debug sections\n")); 273 #else 274 fprintf (stream, _("\ 275 --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\ 276 compress DWARF debug sections using zlib\n")); 277 fprintf (stream, _("\ 278 --nocompress-debug-sections\n\ 279 don't compress DWARF debug sections [default]\n")); 280 #endif 281 fprintf (stream, _("\ 282 -D produce assembler debugging messages\n")); 283 fprintf (stream, _("\ 284 --debug-prefix-map OLD=NEW\n\ 285 map OLD to NEW in debug information\n")); 286 fprintf (stream, _("\ 287 --defsym SYM=VAL define symbol SYM to given value\n")); 288 #ifdef USE_EMULATIONS 289 { 290 int i; 291 const char *def_em; 292 293 fprintf (stream, "\ 294 --em=["); 295 for (i = 0; i < n_emulations - 1; i++) 296 fprintf (stream, "%s | ", emulations[i]->name); 297 fprintf (stream, "%s]\n", emulations[i]->name); 298 299 def_em = getenv (EMULATION_ENVIRON); 300 if (!def_em) 301 def_em = DEFAULT_EMULATION; 302 fprintf (stream, _("\ 303 emulate output (default %s)\n"), def_em); 304 } 305 #endif 306 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF 307 fprintf (stream, _("\ 308 --execstack require executable stack for this object\n")); 309 fprintf (stream, _("\ 310 --noexecstack don't require executable stack for this object\n")); 311 fprintf (stream, _("\ 312 --size-check=[error|warning]\n\ 313 ELF .size directive check (default --size-check=error)\n")); 314 fprintf (stream, _("\ 315 --elf-stt-common=[no|yes] ")); 316 if (DEFAULT_GENERATE_ELF_STT_COMMON) 317 fprintf (stream, _("(default: yes)\n")); 318 else 319 fprintf (stream, _("(default: no)\n")); 320 fprintf (stream, _("\ 321 generate ELF common symbols with STT_COMMON type\n")); 322 fprintf (stream, _("\ 323 --sectname-subst enable section name substitution sequences\n")); 324 325 fprintf (stream, _("\ 326 --generate-missing-build-notes=[no|yes] ")); 327 #if DEFAULT_GENERATE_BUILD_NOTES 328 fprintf (stream, _("(default: yes)\n")); 329 #else 330 fprintf (stream, _("(default: no)\n")); 331 #endif 332 fprintf (stream, _("\ 333 generate GNU Build notes if none are present in the input\n")); 334 #endif /* OBJ_ELF */ 335 336 fprintf (stream, _("\ 337 -f skip whitespace and comment preprocessing\n")); 338 fprintf (stream, _("\ 339 -g --gen-debug generate debugging information\n")); 340 fprintf (stream, _("\ 341 --gstabs generate STABS debugging information\n")); 342 fprintf (stream, _("\ 343 --gstabs+ generate STABS debug info with GNU extensions\n")); 344 fprintf (stream, _("\ 345 --gdwarf-<N> generate DWARF<N> debugging information. 2 <= <N> <= 5\n")); 346 fprintf (stream, _("\ 347 --gdwarf-sections generate per-function section names for DWARF line information\n")); 348 fprintf (stream, _("\ 349 --target-help show target specific options\n")); 350 fprintf (stream, _("\ 351 -I DIR add DIR to search list for .include directives\n")); 352 fprintf (stream, _("\ 353 -J don't warn about signed overflow\n")); 354 fprintf (stream, _("\ 355 -K warn when differences altered for long displacements\n")); 356 fprintf (stream, _("\ 357 -L,--keep-locals keep local symbols (e.g. starting with `L')\n")); 358 fprintf (stream, _("\ 359 -M,--mri assemble in MRI compatibility mode\n")); 360 fprintf (stream, _("\ 361 --MD FILE write dependency information in FILE (default none)\n")); 362 fprintf (stream, _("\ 363 -nocpp ignored\n")); 364 fprintf (stream, _("\ 365 -no-pad-sections do not pad the end of sections to alignment boundaries\n")); 366 fprintf (stream, _("\ 367 -o OBJFILE name the object-file output OBJFILE (default a.out)\n")); 368 fprintf (stream, _("\ 369 -R fold data section into text section\n")); 370 fprintf (stream, _("\ 371 --statistics print various measured statistics from execution\n")); 372 fprintf (stream, _("\ 373 --strip-local-absolute strip local absolute symbols\n")); 374 fprintf (stream, _("\ 375 --traditional-format Use same format as native assembler when possible\n")); 376 fprintf (stream, _("\ 377 --version print assembler version number and exit\n")); 378 fprintf (stream, _("\ 379 -W --no-warn suppress warnings\n")); 380 fprintf (stream, _("\ 381 --warn don't suppress warnings\n")); 382 fprintf (stream, _("\ 383 --fatal-warnings treat warnings as errors\n")); 384 #ifdef HAVE_ITBL_CPU 385 fprintf (stream, _("\ 386 --itbl INSTTBL extend instruction set to include instructions\n\ 387 matching the specifications defined in file INSTTBL\n")); 388 #endif 389 fprintf (stream, _("\ 390 -w ignored\n")); 391 fprintf (stream, _("\ 392 -X ignored\n")); 393 fprintf (stream, _("\ 394 -Z generate object file even after errors\n")); 395 fprintf (stream, _("\ 396 --listing-lhs-width set the width in words of the output data column of\n\ 397 the listing\n")); 398 fprintf (stream, _("\ 399 --listing-lhs-width2 set the width in words of the continuation lines\n\ 400 of the output data column; ignored if smaller than\n\ 401 the width of the first line\n")); 402 fprintf (stream, _("\ 403 --listing-rhs-width set the max width in characters of the lines from\n\ 404 the source file\n")); 405 fprintf (stream, _("\ 406 --listing-cont-lines set the maximum number of continuation lines used\n\ 407 for the output data column of the listing\n")); 408 fprintf (stream, _("\ 409 @FILE read options from FILE\n")); 410 411 md_show_usage (stream); 412 413 fputc ('\n', stream); 414 415 if (REPORT_BUGS_TO[0] && stream == stdout) 416 fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO); 417 } 418 419 /* Since it is easy to do here we interpret the special arg "-" 420 to mean "use stdin" and we set that argv[] pointing to "". 421 After we have munged argv[], the only things left are source file 422 name(s) and ""(s) denoting stdin. These file names are used 423 (perhaps more than once) later. 424 425 check for new machine-dep cmdline options in 426 md_parse_option definitions in config/tc-*.c. */ 427 428 static void 429 parse_args (int * pargc, char *** pargv) 430 { 431 int old_argc; 432 int new_argc; 433 char ** old_argv; 434 char ** new_argv; 435 /* Starting the short option string with '-' is for programs that 436 expect options and other ARGV-elements in any order and that care about 437 the ordering of the two. We describe each non-option ARGV-element 438 as if it were the argument of an option with character code 1. */ 439 char *shortopts; 440 extern const char *md_shortopts; 441 static const char std_shortopts[] = 442 { 443 '-', 'J', 444 #ifndef WORKING_DOT_WORD 445 /* -K is not meaningful if .word is not being hacked. */ 446 'K', 447 #endif 448 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':', 449 #ifndef VMS 450 /* -v takes an argument on VMS, so we don't make it a generic 451 option. */ 452 'v', 453 #endif 454 'w', 'X', 455 #ifdef HAVE_ITBL_CPU 456 /* New option for extending instruction set (see also --itbl below). */ 457 't', ':', 458 #endif 459 '\0' 460 }; 461 struct option *longopts; 462 extern struct option md_longopts[]; 463 extern size_t md_longopts_size; 464 /* Codes used for the long options with no short synonyms. */ 465 enum option_values 466 { 467 OPTION_HELP = OPTION_STD_BASE, 468 OPTION_NOCPP, 469 OPTION_STATISTICS, 470 OPTION_VERSION, 471 OPTION_DUMPCONFIG, 472 OPTION_VERBOSE, 473 OPTION_EMULATION, 474 OPTION_DEBUG_PREFIX_MAP, 475 OPTION_DEFSYM, 476 OPTION_LISTING_LHS_WIDTH, 477 OPTION_LISTING_LHS_WIDTH2, /* = STD_BASE + 10 */ 478 OPTION_LISTING_RHS_WIDTH, 479 OPTION_LISTING_CONT_LINES, 480 OPTION_DEPFILE, 481 OPTION_GSTABS, 482 OPTION_GSTABS_PLUS, 483 OPTION_GDWARF_2, 484 OPTION_GDWARF_3, 485 OPTION_GDWARF_4, 486 OPTION_GDWARF_5, 487 OPTION_GDWARF_SECTIONS, /* = STD_BASE + 20 */ 488 OPTION_GDWARF_CIE_VERSION, 489 OPTION_STRIP_LOCAL_ABSOLUTE, 490 OPTION_TRADITIONAL_FORMAT, 491 OPTION_WARN, 492 OPTION_TARGET_HELP, 493 OPTION_EXECSTACK, 494 OPTION_NOEXECSTACK, 495 OPTION_SIZE_CHECK, 496 OPTION_ELF_STT_COMMON, 497 OPTION_ELF_BUILD_NOTES, /* = STD_BASE + 30 */ 498 OPTION_SECTNAME_SUBST, 499 OPTION_ALTERNATE, 500 OPTION_AL, 501 OPTION_HASH_TABLE_SIZE, 502 OPTION_REDUCE_MEMORY_OVERHEADS, 503 OPTION_WARN_FATAL, 504 OPTION_COMPRESS_DEBUG, 505 OPTION_NOCOMPRESS_DEBUG, 506 OPTION_NO_PAD_SECTIONS, 507 OPTION_MULTIBYTE_HANDLING /* = STD_BASE + 40 */ 508 /* When you add options here, check that they do 509 not collide with OPTION_MD_BASE. See as.h. */ 510 }; 511 512 static const struct option std_longopts[] = 513 { 514 /* Note: commas are placed at the start of the line rather than 515 the end of the preceding line so that it is simpler to 516 selectively add and remove lines from this list. */ 517 {"alternate", no_argument, NULL, OPTION_ALTERNATE} 518 /* The entry for "a" is here to prevent getopt_long_only() from 519 considering that -a is an abbreviation for --alternate. This is 520 necessary because -a=<FILE> is a valid switch but getopt would 521 normally reject it since --alternate does not take an argument. */ 522 ,{"a", optional_argument, NULL, 'a'} 523 /* Handle -al=<FILE>. */ 524 ,{"al", optional_argument, NULL, OPTION_AL} 525 ,{"compress-debug-sections", optional_argument, NULL, OPTION_COMPRESS_DEBUG} 526 ,{"nocompress-debug-sections", no_argument, NULL, OPTION_NOCOMPRESS_DEBUG} 527 ,{"debug-prefix-map", required_argument, NULL, OPTION_DEBUG_PREFIX_MAP} 528 ,{"defsym", required_argument, NULL, OPTION_DEFSYM} 529 ,{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG} 530 ,{"emulation", required_argument, NULL, OPTION_EMULATION} 531 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF 532 ,{"execstack", no_argument, NULL, OPTION_EXECSTACK} 533 ,{"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK} 534 ,{"size-check", required_argument, NULL, OPTION_SIZE_CHECK} 535 ,{"elf-stt-common", required_argument, NULL, OPTION_ELF_STT_COMMON} 536 ,{"sectname-subst", no_argument, NULL, OPTION_SECTNAME_SUBST} 537 ,{"generate-missing-build-notes", required_argument, NULL, OPTION_ELF_BUILD_NOTES} 538 #endif 539 ,{"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL} 540 ,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF_2} 541 ,{"gdwarf-3", no_argument, NULL, OPTION_GDWARF_3} 542 ,{"gdwarf-4", no_argument, NULL, OPTION_GDWARF_4} 543 ,{"gdwarf-5", no_argument, NULL, OPTION_GDWARF_5} 544 /* GCC uses --gdwarf-2 but GAS used to to use --gdwarf2, 545 so we keep it here for backwards compatibility. */ 546 ,{"gdwarf2", no_argument, NULL, OPTION_GDWARF_2} 547 ,{"gdwarf-sections", no_argument, NULL, OPTION_GDWARF_SECTIONS} 548 ,{"gdwarf-cie-version", required_argument, NULL, OPTION_GDWARF_CIE_VERSION} 549 ,{"gen-debug", no_argument, NULL, 'g'} 550 ,{"gstabs", no_argument, NULL, OPTION_GSTABS} 551 ,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS} 552 ,{"hash-size", required_argument, NULL, OPTION_HASH_TABLE_SIZE} 553 ,{"help", no_argument, NULL, OPTION_HELP} 554 #ifdef HAVE_ITBL_CPU 555 /* New option for extending instruction set (see also -t above). 556 The "-t file" or "--itbl file" option extends the basic set of 557 valid instructions by reading "file", a text file containing a 558 list of instruction formats. The additional opcodes and their 559 formats are added to the built-in set of instructions, and 560 mnemonics for new registers may also be defined. */ 561 ,{"itbl", required_argument, NULL, 't'} 562 #endif 563 /* getopt allows abbreviations, so we do this to stop it from 564 treating -k as an abbreviation for --keep-locals. Some 565 ports use -k to enable PIC assembly. */ 566 ,{"keep-locals", no_argument, NULL, 'L'} 567 ,{"keep-locals", no_argument, NULL, 'L'} 568 ,{"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH} 569 ,{"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2} 570 ,{"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH} 571 ,{"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES} 572 ,{"MD", required_argument, NULL, OPTION_DEPFILE} 573 ,{"mri", no_argument, NULL, 'M'} 574 ,{"nocpp", no_argument, NULL, OPTION_NOCPP} 575 ,{"no-pad-sections", no_argument, NULL, OPTION_NO_PAD_SECTIONS} 576 ,{"no-warn", no_argument, NULL, 'W'} 577 ,{"reduce-memory-overheads", no_argument, NULL, OPTION_REDUCE_MEMORY_OVERHEADS} 578 ,{"statistics", no_argument, NULL, OPTION_STATISTICS} 579 ,{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE} 580 ,{"version", no_argument, NULL, OPTION_VERSION} 581 ,{"verbose", no_argument, NULL, OPTION_VERBOSE} 582 ,{"target-help", no_argument, NULL, OPTION_TARGET_HELP} 583 ,{"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT} 584 ,{"warn", no_argument, NULL, OPTION_WARN} 585 ,{"multibyte-handling", required_argument, NULL, OPTION_MULTIBYTE_HANDLING} 586 }; 587 588 /* Construct the option lists from the standard list and the target 589 dependent list. Include space for an extra NULL option and 590 always NULL terminate. */ 591 shortopts = concat (std_shortopts, md_shortopts, (char *) NULL); 592 longopts = (struct option *) xmalloc (sizeof (std_longopts) 593 + md_longopts_size + sizeof (struct option)); 594 memcpy (longopts, std_longopts, sizeof (std_longopts)); 595 memcpy (((char *) longopts) + sizeof (std_longopts), md_longopts, md_longopts_size); 596 memset (((char *) longopts) + sizeof (std_longopts) + md_longopts_size, 597 0, sizeof (struct option)); 598 599 /* Make a local copy of the old argv. */ 600 old_argc = *pargc; 601 old_argv = *pargv; 602 603 /* Initialize a new argv that contains no options. */ 604 new_argv = XNEWVEC (char *, old_argc + 1); 605 new_argv[0] = old_argv[0]; 606 new_argc = 1; 607 new_argv[new_argc] = NULL; 608 609 while (1) 610 { 611 /* getopt_long_only is like getopt_long, but '-' as well as '--' can 612 indicate a long option. */ 613 int longind; 614 int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts, 615 &longind); 616 617 if (optc == -1) 618 break; 619 620 switch (optc) 621 { 622 default: 623 /* md_parse_option should return 1 if it recognizes optc, 624 0 if not. */ 625 if (md_parse_option (optc, optarg) != 0) 626 break; 627 /* `-v' isn't included in the general short_opts list, so check for 628 it explicitly here before deciding we've gotten a bad argument. */ 629 if (optc == 'v') 630 { 631 #ifdef VMS 632 /* Telling getopt to treat -v's value as optional can result 633 in it picking up a following filename argument here. The 634 VMS code in md_parse_option can return 0 in that case, 635 but it has no way of pushing the filename argument back. */ 636 if (optarg && *optarg) 637 new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL; 638 else 639 #else 640 case 'v': 641 #endif 642 case OPTION_VERBOSE: 643 print_version_id (); 644 verbose = 1; 645 break; 646 } 647 else 648 as_bad (_("unrecognized option -%c%s"), optc, optarg ? optarg : ""); 649 /* Fall through. */ 650 651 case '?': 652 exit (EXIT_FAILURE); 653 654 case 1: /* File name. */ 655 if (!strcmp (optarg, "-")) 656 optarg = (char *) ""; 657 new_argv[new_argc++] = optarg; 658 new_argv[new_argc] = NULL; 659 break; 660 661 case OPTION_TARGET_HELP: 662 md_show_usage (stdout); 663 exit (EXIT_SUCCESS); 664 665 case OPTION_HELP: 666 show_usage (stdout); 667 exit (EXIT_SUCCESS); 668 669 case OPTION_NOCPP: 670 break; 671 672 case OPTION_NO_PAD_SECTIONS: 673 do_not_pad_sections_to_alignment = 1; 674 break; 675 676 case OPTION_STATISTICS: 677 flag_print_statistics = 1; 678 break; 679 680 case OPTION_STRIP_LOCAL_ABSOLUTE: 681 flag_strip_local_absolute = 1; 682 break; 683 684 case OPTION_TRADITIONAL_FORMAT: 685 flag_traditional_format = 1; 686 break; 687 688 case OPTION_MULTIBYTE_HANDLING: 689 if (strcmp (optarg, "allow") == 0) 690 multibyte_handling = multibyte_allow; 691 else if (strcmp (optarg, "warn") == 0) 692 multibyte_handling = multibyte_warn; 693 else if (strcmp (optarg, "warn-sym-only") == 0) 694 multibyte_handling = multibyte_warn_syms; 695 else if (strcmp (optarg, "warn_sym_only") == 0) 696 multibyte_handling = multibyte_warn_syms; 697 else 698 as_fatal (_("unexpected argument to --multibyte-input-option: '%s'"), optarg); 699 break; 700 701 case OPTION_VERSION: 702 /* This output is intended to follow the GNU standards document. */ 703 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING); 704 printf (_("Copyright (C) 2022 Free Software Foundation, Inc.\n")); 705 printf (_("\ 706 This program is free software; you may redistribute it under the terms of\n\ 707 the GNU General Public License version 3 or later.\n\ 708 This program has absolutely no warranty.\n")); 709 #ifdef TARGET_WITH_CPU 710 printf (_("This assembler was configured for a target of `%s' " 711 "and default,\ncpu type `%s'.\n"), 712 TARGET_ALIAS, TARGET_WITH_CPU); 713 #else 714 printf (_("This assembler was configured for a target of `%s'.\n"), 715 TARGET_ALIAS); 716 #endif 717 exit (EXIT_SUCCESS); 718 719 case OPTION_EMULATION: 720 #ifdef USE_EMULATIONS 721 if (strcmp (optarg, this_emulation->name)) 722 as_fatal (_("multiple emulation names specified")); 723 #else 724 as_fatal (_("emulations not handled in this configuration")); 725 #endif 726 break; 727 728 case OPTION_DUMPCONFIG: 729 fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS); 730 fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL); 731 fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU); 732 #ifdef TARGET_OBJ_FORMAT 733 fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT); 734 #endif 735 #ifdef TARGET_FORMAT 736 fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT); 737 #endif 738 exit (EXIT_SUCCESS); 739 740 case OPTION_COMPRESS_DEBUG: 741 if (optarg) 742 { 743 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF 744 if (strcasecmp (optarg, "none") == 0) 745 flag_compress_debug = COMPRESS_DEBUG_NONE; 746 else if (strcasecmp (optarg, "zlib") == 0) 747 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB; 748 else if (strcasecmp (optarg, "zlib-gnu") == 0) 749 flag_compress_debug = COMPRESS_DEBUG_GNU_ZLIB; 750 else if (strcasecmp (optarg, "zlib-gabi") == 0) 751 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB; 752 else 753 as_fatal (_("Invalid --compress-debug-sections option: `%s'"), 754 optarg); 755 #else 756 as_fatal (_("--compress-debug-sections=%s is unsupported"), 757 optarg); 758 #endif 759 } 760 else 761 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB; 762 break; 763 764 case OPTION_NOCOMPRESS_DEBUG: 765 flag_compress_debug = COMPRESS_DEBUG_NONE; 766 break; 767 768 case OPTION_DEBUG_PREFIX_MAP: 769 add_debug_prefix_map (optarg); 770 break; 771 772 case OPTION_DEFSYM: 773 { 774 char *s; 775 valueT i; 776 struct defsym_list *n; 777 778 for (s = optarg; *s != '\0' && *s != '='; s++) 779 ; 780 if (*s == '\0') 781 as_fatal (_("bad defsym; format is --defsym name=value")); 782 *s++ = '\0'; 783 i = bfd_scan_vma (s, (const char **) NULL, 0); 784 n = XNEW (struct defsym_list); 785 n->next = defsyms; 786 n->name = optarg; 787 n->value = i; 788 defsyms = n; 789 } 790 break; 791 792 #ifdef HAVE_ITBL_CPU 793 case 't': 794 { 795 /* optarg is the name of the file containing the instruction 796 formats, opcodes, register names, etc. */ 797 struct itbl_file_list *n; 798 799 if (optarg == NULL) 800 { 801 as_warn (_("no file name following -t option")); 802 break; 803 } 804 805 n = XNEW (struct itbl_file_list); 806 n->next = itbl_files; 807 n->name = optarg; 808 itbl_files = n; 809 810 /* Parse the file and add the new instructions to our internal 811 table. If multiple instruction tables are specified, the 812 information from this table gets appended onto the existing 813 internal table. */ 814 itbl_files->name = xstrdup (optarg); 815 if (itbl_parse (itbl_files->name) != 0) 816 as_fatal (_("failed to read instruction table %s\n"), 817 itbl_files->name); 818 } 819 break; 820 #endif 821 822 case OPTION_DEPFILE: 823 start_dependencies (optarg); 824 break; 825 826 case 'g': 827 /* Some backends, eg Alpha and Mips, use the -g switch for their 828 own purposes. So we check here for an explicit -g and allow 829 the backend to decide if it wants to process it. */ 830 if ( old_argv[optind - 1][1] == 'g' 831 && md_parse_option (optc, optarg)) 832 continue; 833 834 /* We end up here for any -gsomething-not-already-a-long-option. 835 give some useful feedback on not (yet) supported -gdwarfxxx 836 versions/sections/options. */ 837 if (startswith (old_argv[optind - 1], "-gdwarf")) 838 as_fatal (_("unknown DWARF option %s\n"), old_argv[optind - 1]); 839 else if (old_argv[optind - 1][1] == 'g' && optarg != NULL) 840 as_fatal (_("unknown option `%s'"), old_argv[optind - 1]); 841 842 if (md_debug_format_selector) 843 debug_type = md_debug_format_selector (& use_gnu_debug_info_extensions); 844 else if (IS_ELF) 845 { 846 debug_type = DEBUG_DWARF2; 847 dwarf_level = 2; 848 } 849 else 850 debug_type = DEBUG_STABS; 851 break; 852 853 case OPTION_GSTABS_PLUS: 854 use_gnu_debug_info_extensions = 1; 855 /* Fall through. */ 856 case OPTION_GSTABS: 857 debug_type = DEBUG_STABS; 858 break; 859 860 case OPTION_GDWARF_2: 861 debug_type = DEBUG_DWARF2; 862 dwarf_level = 2; 863 break; 864 865 case OPTION_GDWARF_3: 866 debug_type = DEBUG_DWARF2; 867 dwarf_level = 3; 868 break; 869 870 case OPTION_GDWARF_4: 871 debug_type = DEBUG_DWARF2; 872 dwarf_level = 4; 873 break; 874 875 case OPTION_GDWARF_5: 876 debug_type = DEBUG_DWARF2; 877 dwarf_level = 5; 878 break; 879 880 case OPTION_GDWARF_SECTIONS: 881 flag_dwarf_sections = true; 882 break; 883 884 case OPTION_GDWARF_CIE_VERSION: 885 flag_dwarf_cie_version = atoi (optarg); 886 /* The available CIE versions are 1 (DWARF 2), 3 (DWARF 3), and 4 887 (DWARF 4 and 5). */ 888 if (flag_dwarf_cie_version < 1 889 || flag_dwarf_cie_version == 2 890 || flag_dwarf_cie_version > 4) 891 as_fatal (_("Invalid --gdwarf-cie-version `%s'"), optarg); 892 switch (flag_dwarf_cie_version) 893 { 894 case 1: 895 if (dwarf_level < 2) 896 dwarf_level = 2; 897 break; 898 case 3: 899 if (dwarf_level < 3) 900 dwarf_level = 3; 901 break; 902 default: 903 if (dwarf_level < 4) 904 dwarf_level = 4; 905 break; 906 } 907 break; 908 909 case 'J': 910 flag_signed_overflow_ok = 1; 911 break; 912 913 #ifndef WORKING_DOT_WORD 914 case 'K': 915 flag_warn_displacement = 1; 916 break; 917 #endif 918 case 'L': 919 flag_keep_locals = 1; 920 break; 921 922 case OPTION_LISTING_LHS_WIDTH: 923 listing_lhs_width = atoi (optarg); 924 if (listing_lhs_width_second < listing_lhs_width) 925 listing_lhs_width_second = listing_lhs_width; 926 break; 927 case OPTION_LISTING_LHS_WIDTH2: 928 { 929 int tmp = atoi (optarg); 930 931 if (tmp > listing_lhs_width) 932 listing_lhs_width_second = tmp; 933 } 934 break; 935 case OPTION_LISTING_RHS_WIDTH: 936 listing_rhs_width = atoi (optarg); 937 break; 938 case OPTION_LISTING_CONT_LINES: 939 listing_lhs_cont_lines = atoi (optarg); 940 break; 941 942 case 'M': 943 flag_mri = 1; 944 #ifdef TC_M68K 945 flag_m68k_mri = 1; 946 #endif 947 break; 948 949 case 'R': 950 flag_readonly_data_in_text = 1; 951 break; 952 953 case 'W': 954 flag_no_warnings = 1; 955 break; 956 957 case OPTION_WARN: 958 flag_no_warnings = 0; 959 flag_fatal_warnings = 0; 960 break; 961 962 case OPTION_WARN_FATAL: 963 flag_no_warnings = 0; 964 flag_fatal_warnings = 1; 965 break; 966 967 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF 968 case OPTION_EXECSTACK: 969 flag_execstack = 1; 970 flag_noexecstack = 0; 971 break; 972 973 case OPTION_NOEXECSTACK: 974 flag_noexecstack = 1; 975 flag_execstack = 0; 976 break; 977 978 case OPTION_SIZE_CHECK: 979 if (strcasecmp (optarg, "error") == 0) 980 flag_allow_nonconst_size = false; 981 else if (strcasecmp (optarg, "warning") == 0) 982 flag_allow_nonconst_size = true; 983 else 984 as_fatal (_("Invalid --size-check= option: `%s'"), optarg); 985 break; 986 987 case OPTION_ELF_STT_COMMON: 988 if (strcasecmp (optarg, "no") == 0) 989 flag_use_elf_stt_common = 0; 990 else if (strcasecmp (optarg, "yes") == 0) 991 flag_use_elf_stt_common = 1; 992 else 993 as_fatal (_("Invalid --elf-stt-common= option: `%s'"), 994 optarg); 995 break; 996 997 case OPTION_SECTNAME_SUBST: 998 flag_sectname_subst = 1; 999 break; 1000 1001 case OPTION_ELF_BUILD_NOTES: 1002 if (strcasecmp (optarg, "no") == 0) 1003 flag_generate_build_notes = false; 1004 else if (strcasecmp (optarg, "yes") == 0) 1005 flag_generate_build_notes = true; 1006 else 1007 as_fatal (_("Invalid --generate-missing-build-notes option: `%s'"), 1008 optarg); 1009 break; 1010 1011 #endif /* OBJ_ELF */ 1012 1013 case 'Z': 1014 flag_always_generate_output = 1; 1015 break; 1016 1017 case OPTION_AL: 1018 listing |= LISTING_LISTING; 1019 if (optarg) 1020 listing_filename = xstrdup (optarg); 1021 break; 1022 1023 case OPTION_ALTERNATE: 1024 optarg = old_argv [optind - 1]; 1025 while (* optarg == '-') 1026 optarg ++; 1027 1028 if (strcmp (optarg, "alternate") == 0) 1029 { 1030 flag_macro_alternate = 1; 1031 break; 1032 } 1033 optarg ++; 1034 /* Fall through. */ 1035 1036 case 'a': 1037 if (optarg) 1038 { 1039 if (optarg != old_argv[optind] && optarg[-1] == '=') 1040 --optarg; 1041 1042 if (md_parse_option (optc, optarg) != 0) 1043 break; 1044 1045 while (*optarg) 1046 { 1047 switch (*optarg) 1048 { 1049 case 'c': 1050 listing |= LISTING_NOCOND; 1051 break; 1052 case 'd': 1053 listing |= LISTING_NODEBUG; 1054 break; 1055 case 'g': 1056 listing |= LISTING_GENERAL; 1057 break; 1058 case 'h': 1059 listing |= LISTING_HLL; 1060 break; 1061 case 'l': 1062 listing |= LISTING_LISTING; 1063 break; 1064 case 'm': 1065 listing |= LISTING_MACEXP; 1066 break; 1067 case 'n': 1068 listing |= LISTING_NOFORM; 1069 break; 1070 case 's': 1071 listing |= LISTING_SYMBOLS; 1072 break; 1073 case '=': 1074 listing_filename = xstrdup (optarg + 1); 1075 optarg += strlen (listing_filename); 1076 break; 1077 default: 1078 as_fatal (_("invalid listing option `%c'"), *optarg); 1079 break; 1080 } 1081 optarg++; 1082 } 1083 } 1084 if (!listing) 1085 listing = LISTING_DEFAULT; 1086 break; 1087 1088 case 'D': 1089 /* DEBUG is implemented: it debugs different 1090 things from other people's assemblers. */ 1091 flag_debug = 1; 1092 break; 1093 1094 case 'f': 1095 flag_no_comments = 1; 1096 break; 1097 1098 case 'I': 1099 { /* Include file directory. */ 1100 char *temp = xstrdup (optarg); 1101 1102 add_include_dir (temp); 1103 break; 1104 } 1105 1106 case 'o': 1107 out_file_name = xstrdup (optarg); 1108 break; 1109 1110 case 'w': 1111 break; 1112 1113 case 'X': 1114 /* -X means treat warnings as errors. */ 1115 break; 1116 1117 case OPTION_REDUCE_MEMORY_OVERHEADS: 1118 break; 1119 1120 case OPTION_HASH_TABLE_SIZE: 1121 break; 1122 } 1123 } 1124 1125 free (shortopts); 1126 free (longopts); 1127 1128 *pargc = new_argc; 1129 *pargv = new_argv; 1130 1131 #ifdef md_after_parse_args 1132 md_after_parse_args (); 1133 #endif 1134 } 1135 1136 static void 1137 dump_statistics (void) 1138 { 1139 long run_time = get_run_time () - start_time; 1140 1141 fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"), 1142 myname, run_time / 1000000, run_time % 1000000); 1143 1144 subsegs_print_statistics (stderr); 1145 write_print_statistics (stderr); 1146 symbol_print_statistics (stderr); 1147 read_print_statistics (stderr); 1148 1149 #ifdef tc_print_statistics 1150 tc_print_statistics (stderr); 1151 #endif 1152 1153 #ifdef obj_print_statistics 1154 obj_print_statistics (stderr); 1155 #endif 1156 } 1157 1158 static void 1159 close_output_file (void) 1160 { 1161 output_file_close (out_file_name); 1162 if (!keep_it) 1163 unlink_if_ordinary (out_file_name); 1164 } 1165 1166 /* The interface between the macro code and gas expression handling. */ 1167 1168 static size_t 1169 macro_expr (const char *emsg, size_t idx, sb *in, offsetT *val) 1170 { 1171 expressionS ex; 1172 1173 sb_terminate (in); 1174 1175 temp_ilp (in->ptr + idx); 1176 expression_and_evaluate (&ex); 1177 idx = input_line_pointer - in->ptr; 1178 restore_ilp (); 1179 1180 if (ex.X_op != O_constant) 1181 as_bad ("%s", emsg); 1182 1183 *val = ex.X_add_number; 1184 1185 return idx; 1186 } 1187 1188 /* Here to attempt 1 pass over each input file. 1189 We scan argv[*] looking for filenames or exactly "" which is 1190 shorthand for stdin. Any argv that is NULL is not a file-name. 1191 We set need_pass_2 TRUE if, after this, we still have unresolved 1192 expressions of the form (unknown value)+-(unknown value). 1193 1194 Note the un*x semantics: there is only 1 logical input file, but it 1195 may be a catenation of many 'physical' input files. */ 1196 1197 static void 1198 perform_an_assembly_pass (int argc, char ** argv) 1199 { 1200 int saw_a_file = 0; 1201 #ifndef OBJ_MACH_O 1202 flagword applicable; 1203 #endif 1204 1205 need_pass_2 = 0; 1206 1207 #ifndef OBJ_MACH_O 1208 /* Create the standard sections, and those the assembler uses 1209 internally. */ 1210 text_section = subseg_new (TEXT_SECTION_NAME, 0); 1211 data_section = subseg_new (DATA_SECTION_NAME, 0); 1212 bss_section = subseg_new (BSS_SECTION_NAME, 0); 1213 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed 1214 to have relocs, otherwise we don't find out in time. */ 1215 applicable = bfd_applicable_section_flags (stdoutput); 1216 bfd_set_section_flags (text_section, 1217 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC 1218 | SEC_CODE | SEC_READONLY)); 1219 bfd_set_section_flags (data_section, 1220 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC 1221 | SEC_DATA)); 1222 bfd_set_section_flags (bss_section, applicable & SEC_ALLOC); 1223 seg_info (bss_section)->bss = 1; 1224 #endif 1225 subseg_new (BFD_ABS_SECTION_NAME, 0); 1226 subseg_new (BFD_UND_SECTION_NAME, 0); 1227 reg_section = subseg_new ("*GAS `reg' section*", 0); 1228 expr_section = subseg_new ("*GAS `expr' section*", 0); 1229 1230 #ifndef OBJ_MACH_O 1231 subseg_set (text_section, 0); 1232 #endif 1233 1234 /* This may add symbol table entries, which requires having an open BFD, 1235 and sections already created. */ 1236 md_begin (); 1237 1238 #ifdef USING_CGEN 1239 gas_cgen_begin (); 1240 #endif 1241 #ifdef obj_begin 1242 obj_begin (); 1243 #endif 1244 1245 /* Skip argv[0]. */ 1246 argv++; 1247 argc--; 1248 1249 while (argc--) 1250 { 1251 if (*argv) 1252 { /* Is it a file-name argument? */ 1253 PROGRESS (1); 1254 saw_a_file++; 1255 /* argv->"" if stdin desired, else->filename. */ 1256 read_a_source_file (*argv); 1257 } 1258 argv++; /* Completed that argv. */ 1259 } 1260 if (!saw_a_file) 1261 read_a_source_file (""); 1262 } 1263 1264 1265 int 1266 main (int argc, char ** argv) 1267 { 1268 char ** argv_orig = argv; 1269 struct stat sob; 1270 1271 int macro_strip_at; 1272 1273 start_time = get_run_time (); 1274 signal_init (); 1275 1276 #ifdef HAVE_LC_MESSAGES 1277 setlocale (LC_MESSAGES, ""); 1278 #endif 1279 setlocale (LC_CTYPE, ""); 1280 bindtextdomain (PACKAGE, LOCALEDIR); 1281 textdomain (PACKAGE); 1282 1283 if (debug_memory) 1284 chunksize = 64; 1285 1286 #ifdef HOST_SPECIAL_INIT 1287 HOST_SPECIAL_INIT (argc, argv); 1288 #endif 1289 1290 myname = argv[0]; 1291 xmalloc_set_program_name (myname); 1292 1293 expandargv (&argc, &argv); 1294 1295 START_PROGRESS (myname, 0); 1296 1297 #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME 1298 #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out" 1299 #endif 1300 1301 out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME; 1302 1303 hex_init (); 1304 if (bfd_init () != BFD_INIT_MAGIC) 1305 as_fatal (_("libbfd ABI mismatch")); 1306 bfd_set_error_program_name (myname); 1307 1308 #ifdef USE_EMULATIONS 1309 select_emulation_mode (argc, argv); 1310 #endif 1311 1312 PROGRESS (1); 1313 /* Call parse_args before any of the init/begin functions 1314 so that switches like --hash-size can be honored. */ 1315 parse_args (&argc, &argv); 1316 1317 if (argc > 1 && stat (out_file_name, &sob) == 0) 1318 { 1319 int i; 1320 1321 for (i = 1; i < argc; ++i) 1322 { 1323 struct stat sib; 1324 1325 /* Check that the input file and output file are different. */ 1326 if (stat (argv[i], &sib) == 0 1327 && sib.st_ino == sob.st_ino 1328 /* POSIX emulating systems may support stat() but if the 1329 underlying file system does not support a file serial number 1330 of some kind then they will return 0 for the inode. So 1331 two files with an inode of 0 may not actually be the same. 1332 On real POSIX systems no ordinary file will ever have an 1333 inode of 0. */ 1334 && sib.st_ino != 0 1335 /* Different files may have the same inode number if they 1336 reside on different devices, so check the st_dev field as 1337 well. */ 1338 && sib.st_dev == sob.st_dev 1339 /* PR 25572: Only check regular files. Devices, sockets and so 1340 on might actually work as both input and output. Plus there 1341 is a use case for using /dev/null as both input and output 1342 when checking for command line option support in a script: 1343 as --foo /dev/null -o /dev/null; if $? then ... */ 1344 && S_ISREG (sib.st_mode)) 1345 { 1346 const char *saved_out_file_name = out_file_name; 1347 1348 /* Don't let as_fatal remove the output file! */ 1349 out_file_name = NULL; 1350 as_fatal (_("The input '%s' and output '%s' files are the same"), 1351 argv[i], saved_out_file_name); 1352 } 1353 } 1354 } 1355 1356 symbol_begin (); 1357 frag_init (); 1358 subsegs_begin (); 1359 read_begin (); 1360 input_scrub_begin (); 1361 expr_begin (); 1362 1363 /* It has to be called after dump_statistics (). */ 1364 xatexit (close_output_file); 1365 1366 if (flag_print_statistics) 1367 xatexit (dump_statistics); 1368 1369 macro_strip_at = 0; 1370 #ifdef TC_I960 1371 macro_strip_at = flag_mri; 1372 #endif 1373 1374 macro_init (flag_macro_alternate, flag_mri, macro_strip_at, macro_expr); 1375 1376 PROGRESS (1); 1377 1378 output_file_create (out_file_name); 1379 gas_assert (stdoutput != 0); 1380 1381 dot_symbol_init (); 1382 1383 #ifdef tc_init_after_args 1384 tc_init_after_args (); 1385 #endif 1386 1387 itbl_init (); 1388 1389 dwarf2_init (); 1390 1391 local_symbol_make (".gasversion.", absolute_section, 1392 &predefined_address_frag, BFD_VERSION / 10000UL); 1393 1394 /* Now that we have fully initialized, and have created the output 1395 file, define any symbols requested by --defsym command line 1396 arguments. */ 1397 while (defsyms != NULL) 1398 { 1399 symbolS *sym; 1400 struct defsym_list *next; 1401 1402 sym = symbol_new (defsyms->name, absolute_section, 1403 &zero_address_frag, defsyms->value); 1404 /* Make symbols defined on the command line volatile, so that they 1405 can be redefined inside a source file. This makes this assembler's 1406 behaviour compatible with earlier versions, but it may not be 1407 completely intuitive. */ 1408 S_SET_VOLATILE (sym); 1409 symbol_table_insert (sym); 1410 next = defsyms->next; 1411 free (defsyms); 1412 defsyms = next; 1413 } 1414 1415 PROGRESS (1); 1416 1417 /* Assemble it. */ 1418 perform_an_assembly_pass (argc, argv); 1419 1420 cond_finish_check (-1); 1421 1422 #ifdef md_end 1423 md_end (); 1424 #endif 1425 1426 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF 1427 if ((flag_execstack || flag_noexecstack) 1428 && OUTPUT_FLAVOR == bfd_target_elf_flavour) 1429 { 1430 segT gnustack; 1431 1432 gnustack = subseg_new (".note.GNU-stack", 0); 1433 bfd_set_section_flags (gnustack, 1434 SEC_READONLY | (flag_execstack ? SEC_CODE : 0)); 1435 1436 } 1437 #endif 1438 1439 /* If we've been collecting dwarf2 .debug_line info, either for 1440 assembly debugging or on behalf of the compiler, emit it now. */ 1441 dwarf2_finish (); 1442 1443 /* If we constructed dwarf2 .eh_frame info, either via .cfi 1444 directives from the user or by the backend, emit it now. */ 1445 cfi_finish (); 1446 1447 keep_it = 0; 1448 if (seen_at_least_1_file ()) 1449 { 1450 int n_warns, n_errs; 1451 char warn_msg[50]; 1452 char err_msg[50]; 1453 1454 write_object_file (); 1455 1456 n_warns = had_warnings (); 1457 n_errs = had_errors (); 1458 1459 sprintf (warn_msg, 1460 ngettext ("%d warning", "%d warnings", n_warns), n_warns); 1461 sprintf (err_msg, 1462 ngettext ("%d error", "%d errors", n_errs), n_errs); 1463 if (flag_fatal_warnings && n_warns != 0) 1464 { 1465 if (n_errs == 0) 1466 as_bad (_("%s, treating warnings as errors"), warn_msg); 1467 n_errs += n_warns; 1468 } 1469 1470 if (n_errs == 0) 1471 keep_it = 1; 1472 else if (flag_always_generate_output) 1473 { 1474 /* The -Z flag indicates that an object file should be generated, 1475 regardless of warnings and errors. */ 1476 keep_it = 1; 1477 fprintf (stderr, _("%s, %s, generating bad object file\n"), 1478 err_msg, warn_msg); 1479 } 1480 } 1481 1482 fflush (stderr); 1483 1484 #ifndef NO_LISTING 1485 listing_print (listing_filename, argv_orig); 1486 #endif 1487 1488 input_scrub_end (); 1489 1490 END_PROGRESS (myname); 1491 1492 /* Use xexit instead of return, because under VMS environments they 1493 may not place the same interpretation on the value given. */ 1494 if (had_errors () != 0) 1495 xexit (EXIT_FAILURE); 1496 1497 /* Only generate dependency file if assembler was successful. */ 1498 print_dependencies (); 1499 1500 xexit (EXIT_SUCCESS); 1501 } 1502