1/* as.c - GAS main program. 2 Copyright (C) 1987-2020 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. */ 56extern 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. */ 61struct defsym_list 62{ 63 struct defsym_list *next; 64 char *name; 65 valueT value; 66}; 67 68 69/* True if a listing is wanted. */ 70int listing; 71 72/* Type of debugging to generate. */ 73enum debug_info_type debug_type = DEBUG_UNSPECIFIED; 74int use_gnu_debug_info_extensions = 0; 75 76#ifndef MD_DEBUG_FORMAT_SELECTOR 77#define MD_DEBUG_FORMAT_SELECTOR NULL 78#endif 79static enum debug_info_type (*md_debug_format_selector) (int *) = MD_DEBUG_FORMAT_SELECTOR; 80 81/* Maximum level of macro nesting. */ 82int max_macro_nest = 100; 83 84/* argv[0] */ 85static 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. */ 89int 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. */ 93int debug_memory = 0; 94 95/* Enable verbose mode. */ 96int 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. */ 103int 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. */ 107unsigned int dwarf_level = 3; 108 109#if defined OBJ_ELF || defined OBJ_MAYBE_ELF 110int flag_use_elf_stt_common = DEFAULT_GENERATE_ELF_STT_COMMON; 111bfd_boolean flag_generate_build_notes = DEFAULT_GENERATE_BUILD_NOTES; 112#endif 113 114/* Keep the output file. */ 115static int keep_it = 0; 116 117segT reg_section; 118segT expr_section; 119segT text_section; 120segT data_section; 121segT bss_section; 122 123/* Name of listing file. */ 124static char *listing_filename = NULL; 125 126static struct defsym_list *defsyms; 127 128#ifdef HAVE_ITBL_CPU 129/* Keep a record of the itbl files we read in. */ 130struct itbl_file_list 131{ 132 struct itbl_file_list *next; 133 char *name; 134}; 135static struct itbl_file_list *itbl_files; 136#endif 137 138static long start_time; 139 140static int flag_macro_alternate; 141 142 143#ifdef USE_EMULATIONS 144#define EMULATION_ENVIRON "AS_EMULATION" 145 146extern struct emulation mipsbelf, mipslelf, mipself; 147extern struct emulation i386coff, i386elf, i386aout; 148extern struct emulation crisaout, criself; 149 150static struct emulation *const emulations[] = { EMULATIONS }; 151static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]); 152 153static void 154select_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 (!strncmp ("--em", argv[i], 4)) 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 198const char * 199default_emul_bfd_name (void) 200{ 201 abort (); 202 return NULL; 203} 204 205void 206common_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 227void 228print_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 241enum compressed_debug_section_type flag_compress_debug 242 = COMPRESS_DEBUG_GABI_ZLIB; 243#endif 244 245static void 246show_usage (FILE * stream) 247{ 248 fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname); 249 250 fprintf (stream, _("\ 251Options:\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 428static void 429parse_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, 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, 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, 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 /* = STD_BASE + 40 */ 507 /* When you add options here, check that they do 508 not collide with OPTION_MD_BASE. See as.h. */ 509 }; 510 511 static const struct option std_longopts[] = 512 { 513 /* Note: commas are placed at the start of the line rather than 514 the end of the preceding line so that it is simpler to 515 selectively add and remove lines from this list. */ 516 {"alternate", no_argument, NULL, OPTION_ALTERNATE} 517 /* The entry for "a" is here to prevent getopt_long_only() from 518 considering that -a is an abbreviation for --alternate. This is 519 necessary because -a=<FILE> is a valid switch but getopt would 520 normally reject it since --alternate does not take an argument. */ 521 ,{"a", optional_argument, NULL, 'a'} 522 /* Handle -al=<FILE>. */ 523 ,{"al", optional_argument, NULL, OPTION_AL} 524 ,{"compress-debug-sections", optional_argument, NULL, OPTION_COMPRESS_DEBUG} 525 ,{"nocompress-debug-sections", no_argument, NULL, OPTION_NOCOMPRESS_DEBUG} 526 ,{"debug-prefix-map", required_argument, NULL, OPTION_DEBUG_PREFIX_MAP} 527 ,{"defsym", required_argument, NULL, OPTION_DEFSYM} 528 ,{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG} 529 ,{"emulation", required_argument, NULL, OPTION_EMULATION} 530#if defined OBJ_ELF || defined OBJ_MAYBE_ELF 531 ,{"execstack", no_argument, NULL, OPTION_EXECSTACK} 532 ,{"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK} 533 ,{"size-check", required_argument, NULL, OPTION_SIZE_CHECK} 534 ,{"elf-stt-common", required_argument, NULL, OPTION_ELF_STT_COMMON} 535 ,{"sectname-subst", no_argument, NULL, OPTION_SECTNAME_SUBST} 536 ,{"generate-missing-build-notes", required_argument, NULL, OPTION_ELF_BUILD_NOTES} 537#endif 538 ,{"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL} 539 ,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF_2} 540 ,{"gdwarf-3", no_argument, NULL, OPTION_GDWARF_3} 541 ,{"gdwarf-4", no_argument, NULL, OPTION_GDWARF_4} 542 ,{"gdwarf-5", no_argument, NULL, OPTION_GDWARF_5} 543 /* GCC uses --gdwarf-2 but GAS used to to use --gdwarf2, 544 so we keep it here for backwards compatibility. */ 545 ,{"gdwarf2", no_argument, NULL, OPTION_GDWARF_2} 546 ,{"gdwarf-sections", no_argument, NULL, OPTION_GDWARF_SECTIONS} 547 ,{"gdwarf-cie-version", required_argument, NULL, OPTION_GDWARF_CIE_VERSION} 548 ,{"gen-debug", no_argument, NULL, 'g'} 549 ,{"gstabs", no_argument, NULL, OPTION_GSTABS} 550 ,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS} 551 ,{"hash-size", required_argument, NULL, OPTION_HASH_TABLE_SIZE} 552 ,{"help", no_argument, NULL, OPTION_HELP} 553#ifdef HAVE_ITBL_CPU 554 /* New option for extending instruction set (see also -t above). 555 The "-t file" or "--itbl file" option extends the basic set of 556 valid instructions by reading "file", a text file containing a 557 list of instruction formats. The additional opcodes and their 558 formats are added to the built-in set of instructions, and 559 mnemonics for new registers may also be defined. */ 560 ,{"itbl", required_argument, NULL, 't'} 561#endif 562 /* getopt allows abbreviations, so we do this to stop it from 563 treating -k as an abbreviation for --keep-locals. Some 564 ports use -k to enable PIC assembly. */ 565 ,{"keep-locals", no_argument, NULL, 'L'} 566 ,{"keep-locals", no_argument, NULL, 'L'} 567 ,{"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH} 568 ,{"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2} 569 ,{"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH} 570 ,{"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES} 571 ,{"MD", required_argument, NULL, OPTION_DEPFILE} 572 ,{"mri", no_argument, NULL, 'M'} 573 ,{"nocpp", no_argument, NULL, OPTION_NOCPP} 574 ,{"no-pad-sections", no_argument, NULL, OPTION_NO_PAD_SECTIONS} 575 ,{"no-warn", no_argument, NULL, 'W'} 576 ,{"reduce-memory-overheads", no_argument, NULL, OPTION_REDUCE_MEMORY_OVERHEADS} 577 ,{"statistics", no_argument, NULL, OPTION_STATISTICS} 578 ,{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE} 579 ,{"version", no_argument, NULL, OPTION_VERSION} 580 ,{"verbose", no_argument, NULL, OPTION_VERBOSE} 581 ,{"target-help", no_argument, NULL, OPTION_TARGET_HELP} 582 ,{"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT} 583 ,{"warn", no_argument, NULL, OPTION_WARN} 584 }; 585 586 /* Construct the option lists from the standard list and the target 587 dependent list. Include space for an extra NULL option and 588 always NULL terminate. */ 589 shortopts = concat (std_shortopts, md_shortopts, (char *) NULL); 590 longopts = (struct option *) xmalloc (sizeof (std_longopts) 591 + md_longopts_size + sizeof (struct option)); 592 memcpy (longopts, std_longopts, sizeof (std_longopts)); 593 memcpy (((char *) longopts) + sizeof (std_longopts), md_longopts, md_longopts_size); 594 memset (((char *) longopts) + sizeof (std_longopts) + md_longopts_size, 595 0, sizeof (struct option)); 596 597 /* Make a local copy of the old argv. */ 598 old_argc = *pargc; 599 old_argv = *pargv; 600 601 /* Initialize a new argv that contains no options. */ 602 new_argv = XNEWVEC (char *, old_argc + 1); 603 new_argv[0] = old_argv[0]; 604 new_argc = 1; 605 new_argv[new_argc] = NULL; 606 607 while (1) 608 { 609 /* getopt_long_only is like getopt_long, but '-' as well as '--' can 610 indicate a long option. */ 611 int longind; 612 int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts, 613 &longind); 614 615 if (optc == -1) 616 break; 617 618 switch (optc) 619 { 620 default: 621 /* md_parse_option should return 1 if it recognizes optc, 622 0 if not. */ 623 if (md_parse_option (optc, optarg) != 0) 624 break; 625 /* `-v' isn't included in the general short_opts list, so check for 626 it explicitly here before deciding we've gotten a bad argument. */ 627 if (optc == 'v') 628 { 629#ifdef VMS 630 /* Telling getopt to treat -v's value as optional can result 631 in it picking up a following filename argument here. The 632 VMS code in md_parse_option can return 0 in that case, 633 but it has no way of pushing the filename argument back. */ 634 if (optarg && *optarg) 635 new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL; 636 else 637#else 638 case 'v': 639#endif 640 case OPTION_VERBOSE: 641 print_version_id (); 642 verbose = 1; 643 break; 644 } 645 else 646 as_bad (_("unrecognized option -%c%s"), optc, optarg ? optarg : ""); 647 /* Fall through. */ 648 649 case '?': 650 exit (EXIT_FAILURE); 651 652 case 1: /* File name. */ 653 if (!strcmp (optarg, "-")) 654 optarg = (char *) ""; 655 new_argv[new_argc++] = optarg; 656 new_argv[new_argc] = NULL; 657 break; 658 659 case OPTION_TARGET_HELP: 660 md_show_usage (stdout); 661 exit (EXIT_SUCCESS); 662 663 case OPTION_HELP: 664 show_usage (stdout); 665 exit (EXIT_SUCCESS); 666 667 case OPTION_NOCPP: 668 break; 669 670 case OPTION_NO_PAD_SECTIONS: 671 do_not_pad_sections_to_alignment = 1; 672 break; 673 674 case OPTION_STATISTICS: 675 flag_print_statistics = 1; 676 break; 677 678 case OPTION_STRIP_LOCAL_ABSOLUTE: 679 flag_strip_local_absolute = 1; 680 break; 681 682 case OPTION_TRADITIONAL_FORMAT: 683 flag_traditional_format = 1; 684 break; 685 686 case OPTION_VERSION: 687 /* This output is intended to follow the GNU standards document. */ 688 printf (_("GNU assembler %s\n"), BFD_VERSION_STRING); 689 printf (_("Copyright (C) 2020 Free Software Foundation, Inc.\n")); 690 printf (_("\ 691This program is free software; you may redistribute it under the terms of\n\ 692the GNU General Public License version 3 or later.\n\ 693This program has absolutely no warranty.\n")); 694#ifdef TARGET_WITH_CPU 695 printf (_("This assembler was configured for a target of `%s' " 696 "and default,\ncpu type `%s'.\n"), 697 TARGET_ALIAS, TARGET_WITH_CPU); 698#else 699 printf (_("This assembler was configured for a target of `%s'.\n"), 700 TARGET_ALIAS); 701#endif 702 exit (EXIT_SUCCESS); 703 704 case OPTION_EMULATION: 705#ifdef USE_EMULATIONS 706 if (strcmp (optarg, this_emulation->name)) 707 as_fatal (_("multiple emulation names specified")); 708#else 709 as_fatal (_("emulations not handled in this configuration")); 710#endif 711 break; 712 713 case OPTION_DUMPCONFIG: 714 fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS); 715 fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL); 716 fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU); 717#ifdef TARGET_OBJ_FORMAT 718 fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT); 719#endif 720#ifdef TARGET_FORMAT 721 fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT); 722#endif 723 exit (EXIT_SUCCESS); 724 725 case OPTION_COMPRESS_DEBUG: 726 if (optarg) 727 { 728#if defined OBJ_ELF || defined OBJ_MAYBE_ELF 729 if (strcasecmp (optarg, "none") == 0) 730 flag_compress_debug = COMPRESS_DEBUG_NONE; 731 else if (strcasecmp (optarg, "zlib") == 0) 732 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB; 733 else if (strcasecmp (optarg, "zlib-gnu") == 0) 734 flag_compress_debug = COMPRESS_DEBUG_GNU_ZLIB; 735 else if (strcasecmp (optarg, "zlib-gabi") == 0) 736 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB; 737 else 738 as_fatal (_("Invalid --compress-debug-sections option: `%s'"), 739 optarg); 740#else 741 as_fatal (_("--compress-debug-sections=%s is unsupported"), 742 optarg); 743#endif 744 } 745 else 746 flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB; 747 break; 748 749 case OPTION_NOCOMPRESS_DEBUG: 750 flag_compress_debug = COMPRESS_DEBUG_NONE; 751 break; 752 753 case OPTION_DEBUG_PREFIX_MAP: 754 add_debug_prefix_map (optarg); 755 break; 756 757 case OPTION_DEFSYM: 758 { 759 char *s; 760 valueT i; 761 struct defsym_list *n; 762 763 for (s = optarg; *s != '\0' && *s != '='; s++) 764 ; 765 if (*s == '\0') 766 as_fatal (_("bad defsym; format is --defsym name=value")); 767 *s++ = '\0'; 768 i = bfd_scan_vma (s, (const char **) NULL, 0); 769 n = XNEW (struct defsym_list); 770 n->next = defsyms; 771 n->name = optarg; 772 n->value = i; 773 defsyms = n; 774 } 775 break; 776 777#ifdef HAVE_ITBL_CPU 778 case 't': 779 { 780 /* optarg is the name of the file containing the instruction 781 formats, opcodes, register names, etc. */ 782 struct itbl_file_list *n; 783 784 if (optarg == NULL) 785 { 786 as_warn (_("no file name following -t option")); 787 break; 788 } 789 790 n = XNEW (struct itbl_file_list); 791 n->next = itbl_files; 792 n->name = optarg; 793 itbl_files = n; 794 795 /* Parse the file and add the new instructions to our internal 796 table. If multiple instruction tables are specified, the 797 information from this table gets appended onto the existing 798 internal table. */ 799 itbl_files->name = xstrdup (optarg); 800 if (itbl_parse (itbl_files->name) != 0) 801 as_fatal (_("failed to read instruction table %s\n"), 802 itbl_files->name); 803 } 804 break; 805#endif 806 807 case OPTION_DEPFILE: 808 start_dependencies (optarg); 809 break; 810 811 case 'g': 812 /* Some backends, eg Alpha and Mips, use the -g switch for their 813 own purposes. So we check here for an explicit -g and allow 814 the backend to decide if it wants to process it. */ 815 if ( old_argv[optind - 1][1] == 'g' 816 && md_parse_option (optc, optarg)) 817 continue; 818 819 /* We end up here for any -gsomething-not-already-a-long-option. 820 give some useful feedback on not (yet) supported -gdwarfxxx 821 versions/sections/options. */ 822 if (strncmp (old_argv[optind - 1], "-gdwarf", 823 strlen ("-gdwarf")) == 0) 824 as_fatal (_("unknown DWARF option %s\n"), old_argv[optind - 1]); 825 826 if (md_debug_format_selector) 827 debug_type = md_debug_format_selector (& use_gnu_debug_info_extensions); 828 else if (IS_ELF) 829 { 830 debug_type = DEBUG_DWARF2; 831 dwarf_level = 2; 832 } 833 else 834 debug_type = DEBUG_STABS; 835 break; 836 837 case OPTION_GSTABS_PLUS: 838 use_gnu_debug_info_extensions = 1; 839 /* Fall through. */ 840 case OPTION_GSTABS: 841 debug_type = DEBUG_STABS; 842 break; 843 844 case OPTION_GDWARF_2: 845 debug_type = DEBUG_DWARF2; 846 dwarf_level = 2; 847 break; 848 849 case OPTION_GDWARF_3: 850 debug_type = DEBUG_DWARF2; 851 dwarf_level = 3; 852 break; 853 854 case OPTION_GDWARF_4: 855 debug_type = DEBUG_DWARF2; 856 dwarf_level = 4; 857 break; 858 859 case OPTION_GDWARF_5: 860 debug_type = DEBUG_DWARF2; 861 dwarf_level = 5; 862 break; 863 864 case OPTION_GDWARF_SECTIONS: 865 flag_dwarf_sections = TRUE; 866 break; 867 868 case OPTION_GDWARF_CIE_VERSION: 869 flag_dwarf_cie_version = atoi (optarg); 870 /* The available CIE versions are 1 (DWARF 2), 3 (DWARF 3), and 4 871 (DWARF 4 and 5). */ 872 if (flag_dwarf_cie_version < 1 873 || flag_dwarf_cie_version == 2 874 || flag_dwarf_cie_version > 4) 875 as_fatal (_("Invalid --gdwarf-cie-version `%s'"), optarg); 876 switch (flag_dwarf_cie_version) 877 { 878 case 1: 879 if (dwarf_level < 2) 880 dwarf_level = 2; 881 break; 882 case 3: 883 if (dwarf_level < 3) 884 dwarf_level = 3; 885 break; 886 default: 887 if (dwarf_level < 4) 888 dwarf_level = 4; 889 break; 890 } 891 break; 892 893 case 'J': 894 flag_signed_overflow_ok = 1; 895 break; 896 897#ifndef WORKING_DOT_WORD 898 case 'K': 899 flag_warn_displacement = 1; 900 break; 901#endif 902 case 'L': 903 flag_keep_locals = 1; 904 break; 905 906 case OPTION_LISTING_LHS_WIDTH: 907 listing_lhs_width = atoi (optarg); 908 if (listing_lhs_width_second < listing_lhs_width) 909 listing_lhs_width_second = listing_lhs_width; 910 break; 911 case OPTION_LISTING_LHS_WIDTH2: 912 { 913 int tmp = atoi (optarg); 914 915 if (tmp > listing_lhs_width) 916 listing_lhs_width_second = tmp; 917 } 918 break; 919 case OPTION_LISTING_RHS_WIDTH: 920 listing_rhs_width = atoi (optarg); 921 break; 922 case OPTION_LISTING_CONT_LINES: 923 listing_lhs_cont_lines = atoi (optarg); 924 break; 925 926 case 'M': 927 flag_mri = 1; 928#ifdef TC_M68K 929 flag_m68k_mri = 1; 930#endif 931 break; 932 933 case 'R': 934 flag_readonly_data_in_text = 1; 935 break; 936 937 case 'W': 938 flag_no_warnings = 1; 939 break; 940 941 case OPTION_WARN: 942 flag_no_warnings = 0; 943 flag_fatal_warnings = 0; 944 break; 945 946 case OPTION_WARN_FATAL: 947 flag_no_warnings = 0; 948 flag_fatal_warnings = 1; 949 break; 950 951#if defined OBJ_ELF || defined OBJ_MAYBE_ELF 952 case OPTION_EXECSTACK: 953 flag_execstack = 1; 954 flag_noexecstack = 0; 955 break; 956 957 case OPTION_NOEXECSTACK: 958 flag_noexecstack = 1; 959 flag_execstack = 0; 960 break; 961 962 case OPTION_SIZE_CHECK: 963 if (strcasecmp (optarg, "error") == 0) 964 flag_allow_nonconst_size = FALSE; 965 else if (strcasecmp (optarg, "warning") == 0) 966 flag_allow_nonconst_size = TRUE; 967 else 968 as_fatal (_("Invalid --size-check= option: `%s'"), optarg); 969 break; 970 971 case OPTION_ELF_STT_COMMON: 972 if (strcasecmp (optarg, "no") == 0) 973 flag_use_elf_stt_common = 0; 974 else if (strcasecmp (optarg, "yes") == 0) 975 flag_use_elf_stt_common = 1; 976 else 977 as_fatal (_("Invalid --elf-stt-common= option: `%s'"), 978 optarg); 979 break; 980 981 case OPTION_SECTNAME_SUBST: 982 flag_sectname_subst = 1; 983 break; 984 985 case OPTION_ELF_BUILD_NOTES: 986 if (strcasecmp (optarg, "no") == 0) 987 flag_generate_build_notes = FALSE; 988 else if (strcasecmp (optarg, "yes") == 0) 989 flag_generate_build_notes = TRUE; 990 else 991 as_fatal (_("Invalid --generate-missing-build-notes option: `%s'"), 992 optarg); 993 break; 994 995#endif /* OBJ_ELF */ 996 997 case 'Z': 998 flag_always_generate_output = 1; 999 break; 1000 1001 case OPTION_AL: 1002 listing |= LISTING_LISTING; 1003 if (optarg) 1004 listing_filename = xstrdup (optarg); 1005 break; 1006 1007 case OPTION_ALTERNATE: 1008 optarg = old_argv [optind - 1]; 1009 while (* optarg == '-') 1010 optarg ++; 1011 1012 if (strcmp (optarg, "alternate") == 0) 1013 { 1014 flag_macro_alternate = 1; 1015 break; 1016 } 1017 optarg ++; 1018 /* Fall through. */ 1019 1020 case 'a': 1021 if (optarg) 1022 { 1023 if (optarg != old_argv[optind] && optarg[-1] == '=') 1024 --optarg; 1025 1026 if (md_parse_option (optc, optarg) != 0) 1027 break; 1028 1029 while (*optarg) 1030 { 1031 switch (*optarg) 1032 { 1033 case 'c': 1034 listing |= LISTING_NOCOND; 1035 break; 1036 case 'd': 1037 listing |= LISTING_NODEBUG; 1038 break; 1039 case 'g': 1040 listing |= LISTING_GENERAL; 1041 break; 1042 case 'h': 1043 listing |= LISTING_HLL; 1044 break; 1045 case 'l': 1046 listing |= LISTING_LISTING; 1047 break; 1048 case 'm': 1049 listing |= LISTING_MACEXP; 1050 break; 1051 case 'n': 1052 listing |= LISTING_NOFORM; 1053 break; 1054 case 's': 1055 listing |= LISTING_SYMBOLS; 1056 break; 1057 case '=': 1058 listing_filename = xstrdup (optarg + 1); 1059 optarg += strlen (listing_filename); 1060 break; 1061 default: 1062 as_fatal (_("invalid listing option `%c'"), *optarg); 1063 break; 1064 } 1065 optarg++; 1066 } 1067 } 1068 if (!listing) 1069 listing = LISTING_DEFAULT; 1070 break; 1071 1072 case 'D': 1073 /* DEBUG is implemented: it debugs different 1074 things from other people's assemblers. */ 1075 flag_debug = 1; 1076 break; 1077 1078 case 'f': 1079 flag_no_comments = 1; 1080 break; 1081 1082 case 'I': 1083 { /* Include file directory. */ 1084 char *temp = xstrdup (optarg); 1085 1086 add_include_dir (temp); 1087 break; 1088 } 1089 1090 case 'o': 1091 out_file_name = xstrdup (optarg); 1092 break; 1093 1094 case 'w': 1095 break; 1096 1097 case 'X': 1098 /* -X means treat warnings as errors. */ 1099 break; 1100 1101 case OPTION_REDUCE_MEMORY_OVERHEADS: 1102 break; 1103 1104 case OPTION_HASH_TABLE_SIZE: 1105 break; 1106 } 1107 } 1108 1109 free (shortopts); 1110 free (longopts); 1111 1112 *pargc = new_argc; 1113 *pargv = new_argv; 1114 1115#ifdef md_after_parse_args 1116 md_after_parse_args (); 1117#endif 1118} 1119 1120static void 1121dump_statistics (void) 1122{ 1123 long run_time = get_run_time () - start_time; 1124 1125 fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"), 1126 myname, run_time / 1000000, run_time % 1000000); 1127 1128 subsegs_print_statistics (stderr); 1129 write_print_statistics (stderr); 1130 symbol_print_statistics (stderr); 1131 read_print_statistics (stderr); 1132 1133#ifdef tc_print_statistics 1134 tc_print_statistics (stderr); 1135#endif 1136 1137#ifdef obj_print_statistics 1138 obj_print_statistics (stderr); 1139#endif 1140} 1141 1142static void 1143close_output_file (void) 1144{ 1145 output_file_close (out_file_name); 1146 if (!keep_it) 1147 unlink_if_ordinary (out_file_name); 1148} 1149 1150/* The interface between the macro code and gas expression handling. */ 1151 1152static size_t 1153macro_expr (const char *emsg, size_t idx, sb *in, offsetT *val) 1154{ 1155 expressionS ex; 1156 1157 sb_terminate (in); 1158 1159 temp_ilp (in->ptr + idx); 1160 expression_and_evaluate (&ex); 1161 idx = input_line_pointer - in->ptr; 1162 restore_ilp (); 1163 1164 if (ex.X_op != O_constant) 1165 as_bad ("%s", emsg); 1166 1167 *val = ex.X_add_number; 1168 1169 return idx; 1170} 1171 1172/* Here to attempt 1 pass over each input file. 1173 We scan argv[*] looking for filenames or exactly "" which is 1174 shorthand for stdin. Any argv that is NULL is not a file-name. 1175 We set need_pass_2 TRUE if, after this, we still have unresolved 1176 expressions of the form (unknown value)+-(unknown value). 1177 1178 Note the un*x semantics: there is only 1 logical input file, but it 1179 may be a catenation of many 'physical' input files. */ 1180 1181static void 1182perform_an_assembly_pass (int argc, char ** argv) 1183{ 1184 int saw_a_file = 0; 1185#ifndef OBJ_MACH_O 1186 flagword applicable; 1187#endif 1188 1189 need_pass_2 = 0; 1190 1191#ifndef OBJ_MACH_O 1192 /* Create the standard sections, and those the assembler uses 1193 internally. */ 1194 text_section = subseg_new (TEXT_SECTION_NAME, 0); 1195 data_section = subseg_new (DATA_SECTION_NAME, 0); 1196 bss_section = subseg_new (BSS_SECTION_NAME, 0); 1197 /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed 1198 to have relocs, otherwise we don't find out in time. */ 1199 applicable = bfd_applicable_section_flags (stdoutput); 1200 bfd_set_section_flags (text_section, 1201 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC 1202 | SEC_CODE | SEC_READONLY)); 1203 bfd_set_section_flags (data_section, 1204 applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC 1205 | SEC_DATA)); 1206 bfd_set_section_flags (bss_section, applicable & SEC_ALLOC); 1207 seg_info (bss_section)->bss = 1; 1208#endif 1209 subseg_new (BFD_ABS_SECTION_NAME, 0); 1210 subseg_new (BFD_UND_SECTION_NAME, 0); 1211 reg_section = subseg_new ("*GAS `reg' section*", 0); 1212 expr_section = subseg_new ("*GAS `expr' section*", 0); 1213 1214#ifndef OBJ_MACH_O 1215 subseg_set (text_section, 0); 1216#endif 1217 1218 /* This may add symbol table entries, which requires having an open BFD, 1219 and sections already created. */ 1220 md_begin (); 1221 1222#ifdef USING_CGEN 1223 gas_cgen_begin (); 1224#endif 1225#ifdef obj_begin 1226 obj_begin (); 1227#endif 1228 1229 /* Skip argv[0]. */ 1230 argv++; 1231 argc--; 1232 1233 while (argc--) 1234 { 1235 if (*argv) 1236 { /* Is it a file-name argument? */ 1237 PROGRESS (1); 1238 saw_a_file++; 1239 /* argv->"" if stdin desired, else->filename. */ 1240 read_a_source_file (*argv); 1241 } 1242 argv++; /* Completed that argv. */ 1243 } 1244 if (!saw_a_file) 1245 read_a_source_file (""); 1246} 1247 1248 1249int 1250main (int argc, char ** argv) 1251{ 1252 char ** argv_orig = argv; 1253 struct stat sob; 1254 1255 int macro_strip_at; 1256 1257 start_time = get_run_time (); 1258 signal_init (); 1259 1260#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) 1261 setlocale (LC_MESSAGES, ""); 1262#endif 1263#if defined (HAVE_SETLOCALE) 1264 setlocale (LC_CTYPE, ""); 1265#endif 1266 bindtextdomain (PACKAGE, LOCALEDIR); 1267 textdomain (PACKAGE); 1268 1269 if (debug_memory) 1270 chunksize = 64; 1271 1272#ifdef HOST_SPECIAL_INIT 1273 HOST_SPECIAL_INIT (argc, argv); 1274#endif 1275 1276 myname = argv[0]; 1277 xmalloc_set_program_name (myname); 1278 1279 expandargv (&argc, &argv); 1280 1281 START_PROGRESS (myname, 0); 1282 1283#ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME 1284#define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out" 1285#endif 1286 1287 out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME; 1288 1289 hex_init (); 1290 if (bfd_init () != BFD_INIT_MAGIC) 1291 as_fatal (_("libbfd ABI mismatch")); 1292 bfd_set_error_program_name (myname); 1293 1294#ifdef USE_EMULATIONS 1295 select_emulation_mode (argc, argv); 1296#endif 1297 1298 PROGRESS (1); 1299 /* Call parse_args before any of the init/begin functions 1300 so that switches like --hash-size can be honored. */ 1301 parse_args (&argc, &argv); 1302 1303 if (argc > 1 && stat (out_file_name, &sob) == 0) 1304 { 1305 int i; 1306 1307 for (i = 1; i < argc; ++i) 1308 { 1309 struct stat sib; 1310 1311 /* Check that the input file and output file are different. */ 1312 if (stat (argv[i], &sib) == 0 1313 && sib.st_ino == sob.st_ino 1314 /* POSIX emulating systems may support stat() but if the 1315 underlying file system does not support a file serial number 1316 of some kind then they will return 0 for the inode. So 1317 two files with an inode of 0 may not actually be the same. 1318 On real POSIX systems no ordinary file will ever have an 1319 inode of 0. */ 1320 && sib.st_ino != 0 1321 /* Different files may have the same inode number if they 1322 reside on different devices, so check the st_dev field as 1323 well. */ 1324 && sib.st_dev == sob.st_dev 1325 /* PR 25572: Only check regular files. Devices, sockets and so 1326 on might actually work as both input and output. Plus there 1327 is a use case for using /dev/null as both input and output 1328 when checking for command line option support in a script: 1329 as --foo /dev/null -o /dev/null; if $? then ... */ 1330 && S_ISREG (sib.st_mode)) 1331 { 1332 const char *saved_out_file_name = out_file_name; 1333 1334 /* Don't let as_fatal remove the output file! */ 1335 out_file_name = NULL; 1336 as_fatal (_("The input '%s' and output '%s' files are the same"), 1337 argv[i], saved_out_file_name); 1338 } 1339 } 1340 } 1341 1342 symbol_begin (); 1343 frag_init (); 1344 subsegs_begin (); 1345 read_begin (); 1346 input_scrub_begin (); 1347 expr_begin (); 1348 1349 /* It has to be called after dump_statistics (). */ 1350 xatexit (close_output_file); 1351 1352 if (flag_print_statistics) 1353 xatexit (dump_statistics); 1354 1355 macro_strip_at = 0; 1356#ifdef TC_I960 1357 macro_strip_at = flag_mri; 1358#endif 1359 1360 macro_init (flag_macro_alternate, flag_mri, macro_strip_at, macro_expr); 1361 1362 PROGRESS (1); 1363 1364 output_file_create (out_file_name); 1365 gas_assert (stdoutput != 0); 1366 1367 dot_symbol_init (); 1368 1369#ifdef tc_init_after_args 1370 tc_init_after_args (); 1371#endif 1372 1373 itbl_init (); 1374 1375 dwarf2_init (); 1376 1377 local_symbol_make (".gasversion.", absolute_section, 1378 &predefined_address_frag, BFD_VERSION / 10000UL); 1379 1380 /* Now that we have fully initialized, and have created the output 1381 file, define any symbols requested by --defsym command line 1382 arguments. */ 1383 while (defsyms != NULL) 1384 { 1385 symbolS *sym; 1386 struct defsym_list *next; 1387 1388 sym = symbol_new (defsyms->name, absolute_section, 1389 &zero_address_frag, defsyms->value); 1390 /* Make symbols defined on the command line volatile, so that they 1391 can be redefined inside a source file. This makes this assembler's 1392 behaviour compatible with earlier versions, but it may not be 1393 completely intuitive. */ 1394 S_SET_VOLATILE (sym); 1395 symbol_table_insert (sym); 1396 next = defsyms->next; 1397 free (defsyms); 1398 defsyms = next; 1399 } 1400 1401 PROGRESS (1); 1402 1403 /* Assemble it. */ 1404 perform_an_assembly_pass (argc, argv); 1405 1406 cond_finish_check (-1); 1407 1408#ifdef md_end 1409 md_end (); 1410#endif 1411 1412#if defined OBJ_ELF || defined OBJ_MAYBE_ELF 1413 if ((flag_execstack || flag_noexecstack) 1414 && OUTPUT_FLAVOR == bfd_target_elf_flavour) 1415 { 1416 segT gnustack; 1417 1418 gnustack = subseg_new (".note.GNU-stack", 0); 1419 bfd_set_section_flags (gnustack, 1420 SEC_READONLY | (flag_execstack ? SEC_CODE : 0)); 1421 1422 } 1423#endif 1424 1425 /* If we've been collecting dwarf2 .debug_line info, either for 1426 assembly debugging or on behalf of the compiler, emit it now. */ 1427 dwarf2_finish (); 1428 1429 /* If we constructed dwarf2 .eh_frame info, either via .cfi 1430 directives from the user or by the backend, emit it now. */ 1431 cfi_finish (); 1432 1433 keep_it = 0; 1434 if (seen_at_least_1_file ()) 1435 { 1436 int n_warns, n_errs; 1437 char warn_msg[50]; 1438 char err_msg[50]; 1439 1440 write_object_file (); 1441 1442 n_warns = had_warnings (); 1443 n_errs = had_errors (); 1444 1445 sprintf (warn_msg, 1446 ngettext ("%d warning", "%d warnings", n_warns), n_warns); 1447 sprintf (err_msg, 1448 ngettext ("%d error", "%d errors", n_errs), n_errs); 1449 if (flag_fatal_warnings && n_warns != 0) 1450 { 1451 if (n_errs == 0) 1452 as_bad (_("%s, treating warnings as errors"), warn_msg); 1453 n_errs += n_warns; 1454 } 1455 1456 if (n_errs == 0) 1457 keep_it = 1; 1458 else if (flag_always_generate_output) 1459 { 1460 /* The -Z flag indicates that an object file should be generated, 1461 regardless of warnings and errors. */ 1462 keep_it = 1; 1463 fprintf (stderr, _("%s, %s, generating bad object file\n"), 1464 err_msg, warn_msg); 1465 } 1466 } 1467 1468 fflush (stderr); 1469 1470#ifndef NO_LISTING 1471 listing_print (listing_filename, argv_orig); 1472#endif 1473 1474 input_scrub_end (); 1475 1476 END_PROGRESS (myname); 1477 1478 /* Use xexit instead of return, because under VMS environments they 1479 may not place the same interpretation on the value given. */ 1480 if (had_errors () != 0) 1481 xexit (EXIT_FAILURE); 1482 1483 /* Only generate dependency file if assembler was successful. */ 1484 print_dependencies (); 1485 1486 xexit (EXIT_SUCCESS); 1487} 1488