| 1 | /* as.c - GAS main program. |
| 2 | Copyright (C) 1987-2016 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 | #if defined OBJ_ELF || defined OBJ_MAYBE_ELF |
| 100 | int flag_use_elf_stt_common = DEFAULT_GENERATE_ELF_STT_COMMON; |
| 101 | #endif |
| 102 | |
| 103 | /* Keep the output file. */ |
| 104 | static int keep_it = 0; |
| 105 | |
| 106 | segT reg_section; |
| 107 | segT expr_section; |
| 108 | segT text_section; |
| 109 | segT data_section; |
| 110 | segT bss_section; |
| 111 | |
| 112 | /* Name of listing file. */ |
| 113 | static char *listing_filename = NULL; |
| 114 | |
| 115 | static struct defsym_list *defsyms; |
| 116 | |
| 117 | #ifdef HAVE_ITBL_CPU |
| 118 | /* Keep a record of the itbl files we read in. */ |
| 119 | struct itbl_file_list |
| 120 | { |
| 121 | struct itbl_file_list *next; |
| 122 | char *name; |
| 123 | }; |
| 124 | static struct itbl_file_list *itbl_files; |
| 125 | #endif |
| 126 | |
| 127 | static long start_time; |
| 128 | #ifdef HAVE_SBRK |
| 129 | char *start_sbrk; |
| 130 | #endif |
| 131 | |
| 132 | static int flag_macro_alternate; |
| 133 | |
| 134 | \f |
| 135 | #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; |
| 150 | const char *em = NULL; |
| 151 | |
| 152 | for (i = 1; i < argc; i++) |
| 153 | if (!strncmp ("--em", argv[i], 4)) |
| 154 | break; |
| 155 | |
| 156 | if (i == argc) |
| 157 | goto do_default; |
| 158 | |
| 159 | p = strchr (argv[i], '='); |
| 160 | if (p) |
| 161 | p++; |
| 162 | else |
| 163 | p = argv[i + 1]; |
| 164 | |
| 165 | if (!p || !*p) |
| 166 | as_fatal (_("missing emulation mode name")); |
| 167 | em = p; |
| 168 | |
| 169 | do_default: |
| 170 | if (em == 0) |
| 171 | em = getenv (EMULATION_ENVIRON); |
| 172 | if (em == 0) |
| 173 | em = DEFAULT_EMULATION; |
| 174 | |
| 175 | if (em) |
| 176 | { |
| 177 | for (i = 0; i < n_emulations; i++) |
| 178 | if (!strcmp (emulations[i]->name, em)) |
| 179 | break; |
| 180 | if (i == n_emulations) |
| 181 | as_fatal (_("unrecognized emulation name `%s'"), em); |
| 182 | this_emulation = emulations[i]; |
| 183 | } |
| 184 | else |
| 185 | this_emulation = emulations[0]; |
| 186 | |
| 187 | this_emulation->init (); |
| 188 | } |
| 189 | |
| 190 | const char * |
| 191 | default_emul_bfd_name (void) |
| 192 | { |
| 193 | abort (); |
| 194 | return NULL; |
| 195 | } |
| 196 | |
| 197 | void |
| 198 | common_emul_init (void) |
| 199 | { |
| 200 | this_format = this_emulation->format; |
| 201 | |
| 202 | if (this_emulation->leading_underscore == 2) |
| 203 | this_emulation->leading_underscore = this_format->dfl_leading_underscore; |
| 204 | |
| 205 | if (this_emulation->default_endian != 2) |
| 206 | target_big_endian = this_emulation->default_endian; |
| 207 | |
| 208 | if (this_emulation->fake_label_name == 0) |
| 209 | { |
| 210 | if (this_emulation->leading_underscore) |
| 211 | this_emulation->fake_label_name = "L0\001"; |
| 212 | else |
| 213 | /* What other parameters should we test? */ |
| 214 | this_emulation->fake_label_name = ".L0\001"; |
| 215 | } |
| 216 | } |
| 217 | #endif |
| 218 | |
| 219 | void |
| 220 | print_version_id (void) |
| 221 | { |
| 222 | static int printed; |
| 223 | |
| 224 | if (printed) |
| 225 | return; |
| 226 | printed = 1; |
| 227 | |
| 228 | fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s\n"), |
| 229 | VERSION, TARGET_ALIAS, BFD_VERSION_STRING); |
| 230 | } |
| 231 | |
| 232 | #ifdef DEFAULT_FLAG_COMPRESS_DEBUG |
| 233 | enum compressed_debug_section_type flag_compress_debug |
| 234 | = COMPRESS_DEBUG_GABI_ZLIB; |
| 235 | #endif |
| 236 | |
| 237 | static void |
| 238 | show_usage (FILE * stream) |
| 239 | { |
| 240 | fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname); |
| 241 | |
| 242 | fprintf (stream, _("\ |
| 243 | Options:\n\ |
| 244 | -a[sub-option...] turn on listings\n\ |
| 245 | Sub-options [default hls]:\n\ |
| 246 | c omit false conditionals\n\ |
| 247 | d omit debugging directives\n\ |
| 248 | g include general info\n\ |
| 249 | h include high-level source\n\ |
| 250 | l include assembly\n\ |
| 251 | m include macro expansions\n\ |
| 252 | n omit forms processing\n\ |
| 253 | s include symbols\n\ |
| 254 | =FILE list to FILE (must be last sub-option)\n")); |
| 255 | |
| 256 | fprintf (stream, _("\ |
| 257 | --alternate initially turn on alternate macro syntax\n")); |
| 258 | #ifdef DEFAULT_FLAG_COMPRESS_DEBUG |
| 259 | fprintf (stream, _("\ |
| 260 | --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\ |
| 261 | compress DWARF debug sections using zlib [default]\n")); |
| 262 | fprintf (stream, _("\ |
| 263 | --nocompress-debug-sections\n\ |
| 264 | don't compress DWARF debug sections\n")); |
| 265 | #else |
| 266 | fprintf (stream, _("\ |
| 267 | --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\ |
| 268 | compress DWARF debug sections using zlib\n")); |
| 269 | fprintf (stream, _("\ |
| 270 | --nocompress-debug-sections\n\ |
| 271 | don't compress DWARF debug sections [default]\n")); |
| 272 | #endif |
| 273 | fprintf (stream, _("\ |
| 274 | -D produce assembler debugging messages\n")); |
| 275 | fprintf (stream, _("\ |
| 276 | --debug-prefix-map OLD=NEW\n\ |
| 277 | map OLD to NEW in debug information\n")); |
| 278 | fprintf (stream, _("\ |
| 279 | --defsym SYM=VAL define symbol SYM to given value\n")); |
| 280 | #ifdef USE_EMULATIONS |
| 281 | { |
| 282 | int i; |
| 283 | const char *def_em; |
| 284 | |
| 285 | fprintf (stream, "\ |
| 286 | --em=["); |
| 287 | for (i = 0; i < n_emulations - 1; i++) |
| 288 | fprintf (stream, "%s | ", emulations[i]->name); |
| 289 | fprintf (stream, "%s]\n", emulations[i]->name); |
| 290 | |
| 291 | def_em = getenv (EMULATION_ENVIRON); |
| 292 | if (!def_em) |
| 293 | def_em = DEFAULT_EMULATION; |
| 294 | fprintf (stream, _("\ |
| 295 | emulate output (default %s)\n"), def_em); |
| 296 | } |
| 297 | #endif |
| 298 | #if defined OBJ_ELF || defined OBJ_MAYBE_ELF |
| 299 | fprintf (stream, _("\ |
| 300 | --execstack require executable stack for this object\n")); |
| 301 | fprintf (stream, _("\ |
| 302 | --noexecstack don't require executable stack for this object\n")); |
| 303 | fprintf (stream, _("\ |
| 304 | --size-check=[error|warning]\n\ |
| 305 | ELF .size directive check (default --size-check=error)\n")); |
| 306 | fprintf (stream, _("\ |
| 307 | --elf-stt-common=[no|yes]\n\ |
| 308 | generate ELF common symbols with STT_COMMON type\n")); |
| 309 | fprintf (stream, _("\ |
| 310 | --sectname-subst enable section name substitution sequences\n")); |
| 311 | #endif |
| 312 | fprintf (stream, _("\ |
| 313 | -f skip whitespace and comment preprocessing\n")); |
| 314 | fprintf (stream, _("\ |
| 315 | -g --gen-debug generate debugging information\n")); |
| 316 | fprintf (stream, _("\ |
| 317 | --gstabs generate STABS debugging information\n")); |
| 318 | fprintf (stream, _("\ |
| 319 | --gstabs+ generate STABS debug info with GNU extensions\n")); |
| 320 | fprintf (stream, _("\ |
| 321 | --gdwarf-2 generate DWARF2 debugging information\n")); |
| 322 | fprintf (stream, _("\ |
| 323 | --gdwarf-sections generate per-function section names for DWARF line information\n")); |
| 324 | fprintf (stream, _("\ |
| 325 | --hash-size=<value> set the hash table size close to <value>\n")); |
| 326 | fprintf (stream, _("\ |
| 327 | --help show this message and exit\n")); |
| 328 | fprintf (stream, _("\ |
| 329 | --target-help show target specific options\n")); |
| 330 | fprintf (stream, _("\ |
| 331 | -I DIR add DIR to search list for .include directives\n")); |
| 332 | fprintf (stream, _("\ |
| 333 | -J don't warn about signed overflow\n")); |
| 334 | fprintf (stream, _("\ |
| 335 | -K warn when differences altered for long displacements\n")); |
| 336 | fprintf (stream, _("\ |
| 337 | -L,--keep-locals keep local symbols (e.g. starting with `L')\n")); |
| 338 | fprintf (stream, _("\ |
| 339 | -M,--mri assemble in MRI compatibility mode\n")); |
| 340 | fprintf (stream, _("\ |
| 341 | --MD FILE write dependency information in FILE (default none)\n")); |
| 342 | fprintf (stream, _("\ |
| 343 | -nocpp ignored\n")); |
| 344 | fprintf (stream, _("\ |
| 345 | -o OBJFILE name the object-file output OBJFILE (default a.out)\n")); |
| 346 | fprintf (stream, _("\ |
| 347 | -R fold data section into text section\n")); |
| 348 | fprintf (stream, _("\ |
| 349 | --reduce-memory-overheads \n\ |
| 350 | prefer smaller memory use at the cost of longer\n\ |
| 351 | assembly times\n")); |
| 352 | fprintf (stream, _("\ |
| 353 | --statistics print various measured statistics from execution\n")); |
| 354 | fprintf (stream, _("\ |
| 355 | --strip-local-absolute strip local absolute symbols\n")); |
| 356 | fprintf (stream, _("\ |
| 357 | --traditional-format Use same format as native assembler when possible\n")); |
| 358 | fprintf (stream, _("\ |
| 359 | --version print assembler version number and exit\n")); |
| 360 | fprintf (stream, _("\ |
| 361 | -W --no-warn suppress warnings\n")); |
| 362 | fprintf (stream, _("\ |
| 363 | --warn don't suppress warnings\n")); |
| 364 | fprintf (stream, _("\ |
| 365 | --fatal-warnings treat warnings as errors\n")); |
| 366 | #ifdef HAVE_ITBL_CPU |
| 367 | fprintf (stream, _("\ |
| 368 | --itbl INSTTBL extend instruction set to include instructions\n\ |
| 369 | matching the specifications defined in file INSTTBL\n")); |
| 370 | #endif |
| 371 | fprintf (stream, _("\ |
| 372 | -w ignored\n")); |
| 373 | fprintf (stream, _("\ |
| 374 | -X ignored\n")); |
| 375 | fprintf (stream, _("\ |
| 376 | -Z generate object file even after errors\n")); |
| 377 | fprintf (stream, _("\ |
| 378 | --listing-lhs-width set the width in words of the output data column of\n\ |
| 379 | the listing\n")); |
| 380 | fprintf (stream, _("\ |
| 381 | --listing-lhs-width2 set the width in words of the continuation lines\n\ |
| 382 | of the output data column; ignored if smaller than\n\ |
| 383 | the width of the first line\n")); |
| 384 | fprintf (stream, _("\ |
| 385 | --listing-rhs-width set the max width in characters of the lines from\n\ |
| 386 | the source file\n")); |
| 387 | fprintf (stream, _("\ |
| 388 | --listing-cont-lines set the maximum number of continuation lines used\n\ |
| 389 | for the output data column of the listing\n")); |
| 390 | fprintf (stream, _("\ |
| 391 | @FILE read options from FILE\n")); |
| 392 | |
| 393 | md_show_usage (stream); |
| 394 | |
| 395 | fputc ('\n', stream); |
| 396 | |
| 397 | if (REPORT_BUGS_TO[0] && stream == stdout) |
| 398 | fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO); |
| 399 | } |
| 400 | |
| 401 | /* Since it is easy to do here we interpret the special arg "-" |
| 402 | to mean "use stdin" and we set that argv[] pointing to "". |
| 403 | After we have munged argv[], the only things left are source file |
| 404 | name(s) and ""(s) denoting stdin. These file names are used |
| 405 | (perhaps more than once) later. |
| 406 | |
| 407 | check for new machine-dep cmdline options in |
| 408 | md_parse_option definitions in config/tc-*.c. */ |
| 409 | |
| 410 | static void |
| 411 | parse_args (int * pargc, char *** pargv) |
| 412 | { |
| 413 | int old_argc; |
| 414 | int new_argc; |
| 415 | char ** old_argv; |
| 416 | char ** new_argv; |
| 417 | /* Starting the short option string with '-' is for programs that |
| 418 | expect options and other ARGV-elements in any order and that care about |
| 419 | the ordering of the two. We describe each non-option ARGV-element |
| 420 | as if it were the argument of an option with character code 1. */ |
| 421 | char *shortopts; |
| 422 | extern const char *md_shortopts; |
| 423 | static const char std_shortopts[] = |
| 424 | { |
| 425 | '-', 'J', |
| 426 | #ifndef WORKING_DOT_WORD |
| 427 | /* -K is not meaningful if .word is not being hacked. */ |
| 428 | 'K', |
| 429 | #endif |
| 430 | 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':', |
| 431 | #ifndef VMS |
| 432 | /* -v takes an argument on VMS, so we don't make it a generic |
| 433 | option. */ |
| 434 | 'v', |
| 435 | #endif |
| 436 | 'w', 'X', |
| 437 | #ifdef HAVE_ITBL_CPU |
| 438 | /* New option for extending instruction set (see also --itbl below). */ |
| 439 | 't', ':', |
| 440 | #endif |
| 441 | '\0' |
| 442 | }; |
| 443 | struct option *longopts; |
| 444 | extern struct option md_longopts[]; |
| 445 | extern size_t md_longopts_size; |
| 446 | /* Codes used for the long options with no short synonyms. */ |
| 447 | enum option_values |
| 448 | { |
| 449 | OPTION_HELP = OPTION_STD_BASE, |
| 450 | OPTION_NOCPP, |
| 451 | OPTION_STATISTICS, |
| 452 | OPTION_VERSION, |
| 453 | OPTION_DUMPCONFIG, |
| 454 | OPTION_VERBOSE, |
| 455 | OPTION_EMULATION, |
| 456 | OPTION_DEBUG_PREFIX_MAP, |
| 457 | OPTION_DEFSYM, |
| 458 | OPTION_LISTING_LHS_WIDTH, |
| 459 | OPTION_LISTING_LHS_WIDTH2, |
| 460 | OPTION_LISTING_RHS_WIDTH, |
| 461 | OPTION_LISTING_CONT_LINES, |
| 462 | OPTION_DEPFILE, |
| 463 | OPTION_GSTABS, |
| 464 | OPTION_GSTABS_PLUS, |
| 465 | OPTION_GDWARF2, |
| 466 | OPTION_GDWARF_SECTIONS, |
| 467 | OPTION_STRIP_LOCAL_ABSOLUTE, |
| 468 | OPTION_TRADITIONAL_FORMAT, |
| 469 | OPTION_WARN, |
| 470 | OPTION_TARGET_HELP, |
| 471 | OPTION_EXECSTACK, |
| 472 | OPTION_NOEXECSTACK, |
| 473 | OPTION_SIZE_CHECK, |
| 474 | OPTION_ELF_STT_COMMON, |
| 475 | OPTION_SECTNAME_SUBST, |
| 476 | OPTION_ALTERNATE, |
| 477 | OPTION_AL, |
| 478 | OPTION_HASH_TABLE_SIZE, |
| 479 | OPTION_REDUCE_MEMORY_OVERHEADS, |
| 480 | OPTION_WARN_FATAL, |
| 481 | OPTION_COMPRESS_DEBUG, |
| 482 | OPTION_NOCOMPRESS_DEBUG |
| 483 | /* When you add options here, check that they do |
| 484 | not collide with OPTION_MD_BASE. See as.h. */ |
| 485 | }; |
| 486 | |
| 487 | static const struct option std_longopts[] = |
| 488 | { |
| 489 | /* Note: commas are placed at the start of the line rather than |
| 490 | the end of the preceding line so that it is simpler to |
| 491 | selectively add and remove lines from this list. */ |
| 492 | {"alternate", no_argument, NULL, OPTION_ALTERNATE} |
| 493 | /* The entry for "a" is here to prevent getopt_long_only() from |
| 494 | considering that -a is an abbreviation for --alternate. This is |
| 495 | necessary because -a=<FILE> is a valid switch but getopt would |
| 496 | normally reject it since --alternate does not take an argument. */ |
| 497 | ,{"a", optional_argument, NULL, 'a'} |
| 498 | /* Handle -al=<FILE>. */ |
| 499 | ,{"al", optional_argument, NULL, OPTION_AL} |
| 500 | ,{"compress-debug-sections", optional_argument, NULL, OPTION_COMPRESS_DEBUG} |
| 501 | ,{"nocompress-debug-sections", no_argument, NULL, OPTION_NOCOMPRESS_DEBUG} |
| 502 | ,{"debug-prefix-map", required_argument, NULL, OPTION_DEBUG_PREFIX_MAP} |
| 503 | ,{"defsym", required_argument, NULL, OPTION_DEFSYM} |
| 504 | ,{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG} |
| 505 | ,{"emulation", required_argument, NULL, OPTION_EMULATION} |
| 506 | #if defined OBJ_ELF || defined OBJ_MAYBE_ELF |
| 507 | ,{"execstack", no_argument, NULL, OPTION_EXECSTACK} |
| 508 | ,{"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK} |
| 509 | ,{"size-check", required_argument, NULL, OPTION_SIZE_CHECK} |
| 510 | ,{"elf-stt-common", required_argument, NULL, OPTION_ELF_STT_COMMON} |
| 511 | ,{"sectname-subst", no_argument, NULL, OPTION_SECTNAME_SUBST} |
| 512 | #endif |
| 513 | ,{"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL} |
| 514 | ,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF2} |
| 515 | /* GCC uses --gdwarf-2 but GAS uses to use --gdwarf2, |
| 516 | so we keep it here for backwards compatibility. */ |
| 517 | ,{"gdwarf2", no_argument, NULL, OPTION_GDWARF2} |
| 518 | ,{"gdwarf-sections", no_argument, NULL, OPTION_GDWARF_SECTIONS} |
| 519 | ,{"gen-debug", no_argument, NULL, 'g'} |
| 520 | ,{"gstabs", no_argument, NULL, OPTION_GSTABS} |
| 521 | ,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS} |
| 522 | ,{"hash-size", required_argument, NULL, OPTION_HASH_TABLE_SIZE} |
| 523 | ,{"help", no_argument, NULL, OPTION_HELP} |
| 524 | #ifdef HAVE_ITBL_CPU |
| 525 | /* New option for extending instruction set (see also -t above). |
| 526 | The "-t file" or "--itbl file" option extends the basic set of |
| 527 | valid instructions by reading "file", a text file containing a |
| 528 | list of instruction formats. The additional opcodes and their |
| 529 | formats are added to the built-in set of instructions, and |
| 530 | mnemonics for new registers may also be defined. */ |
| 531 | ,{"itbl", required_argument, NULL, 't'} |
| 532 | #endif |
| 533 | /* getopt allows abbreviations, so we do this to stop it from |
| 534 | treating -k as an abbreviation for --keep-locals. Some |
| 535 | ports use -k to enable PIC assembly. */ |
| 536 | ,{"keep-locals", no_argument, NULL, 'L'} |
| 537 | ,{"keep-locals", no_argument, NULL, 'L'} |
| 538 | ,{"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH} |
| 539 | ,{"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2} |
| 540 | ,{"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH} |
| 541 | ,{"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES} |
| 542 | ,{"MD", required_argument, NULL, OPTION_DEPFILE} |
| 543 | ,{"mri", no_argument, NULL, 'M'} |
| 544 | ,{"nocpp", no_argument, NULL, OPTION_NOCPP} |
| 545 | ,{"no-warn", no_argument, NULL, 'W'} |
| 546 | ,{"reduce-memory-overheads", no_argument, NULL, OPTION_REDUCE_MEMORY_OVERHEADS} |
| 547 | ,{"statistics", no_argument, NULL, OPTION_STATISTICS} |
| 548 | ,{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE} |
| 549 | ,{"version", no_argument, NULL, OPTION_VERSION} |
| 550 | ,{"verbose", no_argument, NULL, OPTION_VERBOSE} |
| 551 | ,{"target-help", no_argument, NULL, OPTION_TARGET_HELP} |
| 552 | ,{"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT} |
| 553 | ,{"warn", no_argument, NULL, OPTION_WARN} |
| 554 | }; |
| 555 | |
| 556 | /* Construct the option lists from the standard list and the target |
| 557 | dependent list. Include space for an extra NULL option and |
| 558 | always NULL terminate. */ |
| 559 | shortopts = concat (std_shortopts, md_shortopts, (char *) NULL); |
| 560 | longopts = (struct option *) xmalloc (sizeof (std_longopts) |
| 561 | + md_longopts_size + sizeof (struct option)); |
| 562 | memcpy (longopts, std_longopts, sizeof (std_longopts)); |
| 563 | memcpy (((char *) longopts) + sizeof (std_longopts), md_longopts, md_longopts_size); |
| 564 | memset (((char *) longopts) + sizeof (std_longopts) + md_longopts_size, |
| 565 | 0, sizeof (struct option)); |
| 566 | |
| 567 | /* Make a local copy of the old argv. */ |
| 568 | old_argc = *pargc; |
| 569 | old_argv = *pargv; |
| 570 | |
| 571 | /* Initialize a new argv that contains no options. */ |
| 572 | new_argv = XNEWVEC (char *, old_argc + 1); |
| 573 | new_argv[0] = old_argv[0]; |
| 574 | new_argc = 1; |
| 575 | new_argv[new_argc] = NULL; |
| 576 | |
| 577 | while (1) |
| 578 | { |
| 579 | /* getopt_long_only is like getopt_long, but '-' as well as '--' can |
| 580 | indicate a long option. */ |
| 581 | int longind; |
| 582 | int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts, |
| 583 | &longind); |
| 584 | |
| 585 | if (optc == -1) |
| 586 | break; |
| 587 | |
| 588 | switch (optc) |
| 589 | { |
| 590 | default: |
| 591 | /* md_parse_option should return 1 if it recognizes optc, |
| 592 | 0 if not. */ |
| 593 | if (md_parse_option (optc, optarg) != 0) |
| 594 | break; |
| 595 | /* `-v' isn't included in the general short_opts list, so check for |
| 596 | it explicitly here before deciding we've gotten a bad argument. */ |
| 597 | if (optc == 'v') |
| 598 | { |
| 599 | #ifdef VMS |
| 600 | /* Telling getopt to treat -v's value as optional can result |
| 601 | in it picking up a following filename argument here. The |
| 602 | VMS code in md_parse_option can return 0 in that case, |
| 603 | but it has no way of pushing the filename argument back. */ |
| 604 | if (optarg && *optarg) |
| 605 | new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL; |
| 606 | else |
| 607 | #else |
| 608 | case 'v': |
| 609 | #endif |
| 610 | case OPTION_VERBOSE: |
| 611 | print_version_id (); |
| 612 | verbose = 1; |
| 613 | break; |
| 614 | } |
| 615 | else |
| 616 | as_bad (_("unrecognized option -%c%s"), optc, optarg ? optarg : ""); |
| 617 | /* Fall through. */ |
| 618 | |
| 619 | case '?': |
| 620 | exit (EXIT_FAILURE); |
| 621 | |
| 622 | case 1: /* File name. */ |
| 623 | if (!strcmp (optarg, "-")) |
| 624 | optarg = (char *) ""; |
| 625 | new_argv[new_argc++] = optarg; |
| 626 | new_argv[new_argc] = NULL; |
| 627 | break; |
| 628 | |
| 629 | case OPTION_TARGET_HELP: |
| 630 | md_show_usage (stdout); |
| 631 | exit (EXIT_SUCCESS); |
| 632 | |
| 633 | case OPTION_HELP: |
| 634 | show_usage (stdout); |
| 635 | exit (EXIT_SUCCESS); |
| 636 | |
| 637 | case OPTION_NOCPP: |
| 638 | break; |
| 639 | |
| 640 | case OPTION_STATISTICS: |
| 641 | flag_print_statistics = 1; |
| 642 | break; |
| 643 | |
| 644 | case OPTION_STRIP_LOCAL_ABSOLUTE: |
| 645 | flag_strip_local_absolute = 1; |
| 646 | break; |
| 647 | |
| 648 | case OPTION_TRADITIONAL_FORMAT: |
| 649 | flag_traditional_format = 1; |
| 650 | break; |
| 651 | |
| 652 | case OPTION_VERSION: |
| 653 | /* This output is intended to follow the GNU standards document. */ |
| 654 | printf (_("GNU assembler %s\n"), BFD_VERSION_STRING); |
| 655 | printf (_("Copyright (C) 2016 Free Software Foundation, Inc.\n")); |
| 656 | printf (_("\ |
| 657 | This program is free software; you may redistribute it under the terms of\n\ |
| 658 | the GNU General Public License version 3 or later.\n\ |
| 659 | This program has absolutely no warranty.\n")); |
| 660 | printf (_("This assembler was configured for a target of `%s'.\n"), |
| 661 | TARGET_ALIAS); |
| 662 | exit (EXIT_SUCCESS); |
| 663 | |
| 664 | case OPTION_EMULATION: |
| 665 | #ifdef USE_EMULATIONS |
| 666 | if (strcmp (optarg, this_emulation->name)) |
| 667 | as_fatal (_("multiple emulation names specified")); |
| 668 | #else |
| 669 | as_fatal (_("emulations not handled in this configuration")); |
| 670 | #endif |
| 671 | break; |
| 672 | |
| 673 | case OPTION_DUMPCONFIG: |
| 674 | fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS); |
| 675 | fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL); |
| 676 | fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU); |
| 677 | #ifdef TARGET_OBJ_FORMAT |
| 678 | fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT); |
| 679 | #endif |
| 680 | #ifdef TARGET_FORMAT |
| 681 | fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT); |
| 682 | #endif |
| 683 | exit (EXIT_SUCCESS); |
| 684 | |
| 685 | case OPTION_COMPRESS_DEBUG: |
| 686 | if (optarg) |
| 687 | { |
| 688 | #if defined OBJ_ELF || defined OBJ_MAYBE_ELF |
| 689 | if (strcasecmp (optarg, "none") == 0) |
| 690 | flag_compress_debug = COMPRESS_DEBUG_NONE; |
| 691 | else if (strcasecmp (optarg, "zlib") == 0) |
| 692 | flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB; |
| 693 | else if (strcasecmp (optarg, "zlib-gnu") == 0) |
| 694 | flag_compress_debug = COMPRESS_DEBUG_GNU_ZLIB; |
| 695 | else if (strcasecmp (optarg, "zlib-gabi") == 0) |
| 696 | flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB; |
| 697 | else |
| 698 | as_fatal (_("Invalid --compress-debug-sections option: `%s'"), |
| 699 | optarg); |
| 700 | #else |
| 701 | as_fatal (_("--compress-debug-sections=%s is unsupported"), |
| 702 | optarg); |
| 703 | #endif |
| 704 | } |
| 705 | else |
| 706 | flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB; |
| 707 | break; |
| 708 | |
| 709 | case OPTION_NOCOMPRESS_DEBUG: |
| 710 | flag_compress_debug = COMPRESS_DEBUG_NONE; |
| 711 | break; |
| 712 | |
| 713 | case OPTION_DEBUG_PREFIX_MAP: |
| 714 | add_debug_prefix_map (optarg); |
| 715 | break; |
| 716 | |
| 717 | case OPTION_DEFSYM: |
| 718 | { |
| 719 | char *s; |
| 720 | valueT i; |
| 721 | struct defsym_list *n; |
| 722 | |
| 723 | for (s = optarg; *s != '\0' && *s != '='; s++) |
| 724 | ; |
| 725 | if (*s == '\0') |
| 726 | as_fatal (_("bad defsym; format is --defsym name=value")); |
| 727 | *s++ = '\0'; |
| 728 | i = bfd_scan_vma (s, (const char **) NULL, 0); |
| 729 | n = XNEW (struct defsym_list); |
| 730 | n->next = defsyms; |
| 731 | n->name = optarg; |
| 732 | n->value = i; |
| 733 | defsyms = n; |
| 734 | } |
| 735 | break; |
| 736 | |
| 737 | #ifdef HAVE_ITBL_CPU |
| 738 | case 't': |
| 739 | { |
| 740 | /* optarg is the name of the file containing the instruction |
| 741 | formats, opcodes, register names, etc. */ |
| 742 | struct itbl_file_list *n; |
| 743 | |
| 744 | if (optarg == NULL) |
| 745 | { |
| 746 | as_warn (_("no file name following -t option")); |
| 747 | break; |
| 748 | } |
| 749 | |
| 750 | n = XNEW (struct itbl_file_list); |
| 751 | n->next = itbl_files; |
| 752 | n->name = optarg; |
| 753 | itbl_files = n; |
| 754 | |
| 755 | /* Parse the file and add the new instructions to our internal |
| 756 | table. If multiple instruction tables are specified, the |
| 757 | information from this table gets appended onto the existing |
| 758 | internal table. */ |
| 759 | itbl_files->name = xstrdup (optarg); |
| 760 | if (itbl_parse (itbl_files->name) != 0) |
| 761 | as_fatal (_("failed to read instruction table %s\n"), |
| 762 | itbl_files->name); |
| 763 | } |
| 764 | break; |
| 765 | #endif |
| 766 | |
| 767 | case OPTION_DEPFILE: |
| 768 | start_dependencies (optarg); |
| 769 | break; |
| 770 | |
| 771 | case 'g': |
| 772 | /* Some backends, eg Alpha and Mips, use the -g switch for their |
| 773 | own purposes. So we check here for an explicit -g and allow |
| 774 | the backend to decide if it wants to process it. */ |
| 775 | if ( old_argv[optind - 1][1] == 'g' |
| 776 | && md_parse_option (optc, optarg)) |
| 777 | continue; |
| 778 | |
| 779 | if (md_debug_format_selector) |
| 780 | debug_type = md_debug_format_selector (& use_gnu_debug_info_extensions); |
| 781 | else if (IS_ELF) |
| 782 | debug_type = DEBUG_DWARF2; |
| 783 | else |
| 784 | debug_type = DEBUG_STABS; |
| 785 | break; |
| 786 | |
| 787 | case OPTION_GSTABS_PLUS: |
| 788 | use_gnu_debug_info_extensions = 1; |
| 789 | /* Fall through. */ |
| 790 | case OPTION_GSTABS: |
| 791 | debug_type = DEBUG_STABS; |
| 792 | break; |
| 793 | |
| 794 | case OPTION_GDWARF2: |
| 795 | debug_type = DEBUG_DWARF2; |
| 796 | break; |
| 797 | |
| 798 | case OPTION_GDWARF_SECTIONS: |
| 799 | flag_dwarf_sections = TRUE; |
| 800 | break; |
| 801 | |
| 802 | case 'J': |
| 803 | flag_signed_overflow_ok = 1; |
| 804 | break; |
| 805 | |
| 806 | #ifndef WORKING_DOT_WORD |
| 807 | case 'K': |
| 808 | flag_warn_displacement = 1; |
| 809 | break; |
| 810 | #endif |
| 811 | case 'L': |
| 812 | flag_keep_locals = 1; |
| 813 | break; |
| 814 | |
| 815 | case OPTION_LISTING_LHS_WIDTH: |
| 816 | listing_lhs_width = atoi (optarg); |
| 817 | if (listing_lhs_width_second < listing_lhs_width) |
| 818 | listing_lhs_width_second = listing_lhs_width; |
| 819 | break; |
| 820 | case OPTION_LISTING_LHS_WIDTH2: |
| 821 | { |
| 822 | int tmp = atoi (optarg); |
| 823 | |
| 824 | if (tmp > listing_lhs_width) |
| 825 | listing_lhs_width_second = tmp; |
| 826 | } |
| 827 | break; |
| 828 | case OPTION_LISTING_RHS_WIDTH: |
| 829 | listing_rhs_width = atoi (optarg); |
| 830 | break; |
| 831 | case OPTION_LISTING_CONT_LINES: |
| 832 | listing_lhs_cont_lines = atoi (optarg); |
| 833 | break; |
| 834 | |
| 835 | case 'M': |
| 836 | flag_mri = 1; |
| 837 | #ifdef TC_M68K |
| 838 | flag_m68k_mri = 1; |
| 839 | #endif |
| 840 | break; |
| 841 | |
| 842 | case 'R': |
| 843 | flag_readonly_data_in_text = 1; |
| 844 | break; |
| 845 | |
| 846 | case 'W': |
| 847 | flag_no_warnings = 1; |
| 848 | break; |
| 849 | |
| 850 | case OPTION_WARN: |
| 851 | flag_no_warnings = 0; |
| 852 | flag_fatal_warnings = 0; |
| 853 | break; |
| 854 | |
| 855 | case OPTION_WARN_FATAL: |
| 856 | flag_no_warnings = 0; |
| 857 | flag_fatal_warnings = 1; |
| 858 | break; |
| 859 | |
| 860 | #if defined OBJ_ELF || defined OBJ_MAYBE_ELF |
| 861 | case OPTION_EXECSTACK: |
| 862 | flag_execstack = 1; |
| 863 | flag_noexecstack = 0; |
| 864 | break; |
| 865 | |
| 866 | case OPTION_NOEXECSTACK: |
| 867 | flag_noexecstack = 1; |
| 868 | flag_execstack = 0; |
| 869 | break; |
| 870 | |
| 871 | case OPTION_SIZE_CHECK: |
| 872 | if (strcasecmp (optarg, "error") == 0) |
| 873 | flag_allow_nonconst_size = FALSE; |
| 874 | else if (strcasecmp (optarg, "warning") == 0) |
| 875 | flag_allow_nonconst_size = TRUE; |
| 876 | else |
| 877 | as_fatal (_("Invalid --size-check= option: `%s'"), optarg); |
| 878 | break; |
| 879 | |
| 880 | case OPTION_ELF_STT_COMMON: |
| 881 | if (strcasecmp (optarg, "no") == 0) |
| 882 | flag_use_elf_stt_common = 0; |
| 883 | else if (strcasecmp (optarg, "yes") == 0) |
| 884 | flag_use_elf_stt_common = 1; |
| 885 | else |
| 886 | as_fatal (_("Invalid --elf-stt-common= option: `%s'"), |
| 887 | optarg); |
| 888 | break; |
| 889 | |
| 890 | case OPTION_SECTNAME_SUBST: |
| 891 | flag_sectname_subst = 1; |
| 892 | break; |
| 893 | #endif |
| 894 | case 'Z': |
| 895 | flag_always_generate_output = 1; |
| 896 | break; |
| 897 | |
| 898 | case OPTION_AL: |
| 899 | listing |= LISTING_LISTING; |
| 900 | if (optarg) |
| 901 | listing_filename = xstrdup (optarg); |
| 902 | break; |
| 903 | |
| 904 | case OPTION_ALTERNATE: |
| 905 | optarg = old_argv [optind - 1]; |
| 906 | while (* optarg == '-') |
| 907 | optarg ++; |
| 908 | |
| 909 | if (strcmp (optarg, "alternate") == 0) |
| 910 | { |
| 911 | flag_macro_alternate = 1; |
| 912 | break; |
| 913 | } |
| 914 | optarg ++; |
| 915 | /* Fall through. */ |
| 916 | |
| 917 | case 'a': |
| 918 | if (optarg) |
| 919 | { |
| 920 | if (optarg != old_argv[optind] && optarg[-1] == '=') |
| 921 | --optarg; |
| 922 | |
| 923 | if (md_parse_option (optc, optarg) != 0) |
| 924 | break; |
| 925 | |
| 926 | while (*optarg) |
| 927 | { |
| 928 | switch (*optarg) |
| 929 | { |
| 930 | case 'c': |
| 931 | listing |= LISTING_NOCOND; |
| 932 | break; |
| 933 | case 'd': |
| 934 | listing |= LISTING_NODEBUG; |
| 935 | break; |
| 936 | case 'g': |
| 937 | listing |= LISTING_GENERAL; |
| 938 | break; |
| 939 | case 'h': |
| 940 | listing |= LISTING_HLL; |
| 941 | break; |
| 942 | case 'l': |
| 943 | listing |= LISTING_LISTING; |
| 944 | break; |
| 945 | case 'm': |
| 946 | listing |= LISTING_MACEXP; |
| 947 | break; |
| 948 | case 'n': |
| 949 | listing |= LISTING_NOFORM; |
| 950 | break; |
| 951 | case 's': |
| 952 | listing |= LISTING_SYMBOLS; |
| 953 | break; |
| 954 | case '=': |
| 955 | listing_filename = xstrdup (optarg + 1); |
| 956 | optarg += strlen (listing_filename); |
| 957 | break; |
| 958 | default: |
| 959 | as_fatal (_("invalid listing option `%c'"), *optarg); |
| 960 | break; |
| 961 | } |
| 962 | optarg++; |
| 963 | } |
| 964 | } |
| 965 | if (!listing) |
| 966 | listing = LISTING_DEFAULT; |
| 967 | break; |
| 968 | |
| 969 | case 'D': |
| 970 | /* DEBUG is implemented: it debugs different |
| 971 | things from other people's assemblers. */ |
| 972 | flag_debug = 1; |
| 973 | break; |
| 974 | |
| 975 | case 'f': |
| 976 | flag_no_comments = 1; |
| 977 | break; |
| 978 | |
| 979 | case 'I': |
| 980 | { /* Include file directory. */ |
| 981 | char *temp = xstrdup (optarg); |
| 982 | |
| 983 | add_include_dir (temp); |
| 984 | break; |
| 985 | } |
| 986 | |
| 987 | case 'o': |
| 988 | out_file_name = xstrdup (optarg); |
| 989 | break; |
| 990 | |
| 991 | case 'w': |
| 992 | break; |
| 993 | |
| 994 | case 'X': |
| 995 | /* -X means treat warnings as errors. */ |
| 996 | break; |
| 997 | |
| 998 | case OPTION_REDUCE_MEMORY_OVERHEADS: |
| 999 | /* The only change we make at the moment is to reduce |
| 1000 | the size of the hash tables that we use. */ |
| 1001 | set_gas_hash_table_size (4051); |
| 1002 | break; |
| 1003 | |
| 1004 | case OPTION_HASH_TABLE_SIZE: |
| 1005 | { |
| 1006 | unsigned long new_size; |
| 1007 | |
| 1008 | new_size = strtoul (optarg, NULL, 0); |
| 1009 | if (new_size) |
| 1010 | set_gas_hash_table_size (new_size); |
| 1011 | else |
| 1012 | as_fatal (_("--hash-size needs a numeric argument")); |
| 1013 | break; |
| 1014 | } |
| 1015 | } |
| 1016 | } |
| 1017 | |
| 1018 | free (shortopts); |
| 1019 | free (longopts); |
| 1020 | |
| 1021 | *pargc = new_argc; |
| 1022 | *pargv = new_argv; |
| 1023 | |
| 1024 | #ifdef md_after_parse_args |
| 1025 | md_after_parse_args (); |
| 1026 | #endif |
| 1027 | } |
| 1028 | |
| 1029 | static void |
| 1030 | dump_statistics (void) |
| 1031 | { |
| 1032 | #ifdef HAVE_SBRK |
| 1033 | char *lim = (char *) sbrk (0); |
| 1034 | #endif |
| 1035 | long run_time = get_run_time () - start_time; |
| 1036 | |
| 1037 | fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"), |
| 1038 | myname, run_time / 1000000, run_time % 1000000); |
| 1039 | #ifdef HAVE_SBRK |
| 1040 | fprintf (stderr, _("%s: data size %ld\n"), |
| 1041 | myname, (long) (lim - start_sbrk)); |
| 1042 | #endif |
| 1043 | |
| 1044 | subsegs_print_statistics (stderr); |
| 1045 | write_print_statistics (stderr); |
| 1046 | symbol_print_statistics (stderr); |
| 1047 | read_print_statistics (stderr); |
| 1048 | |
| 1049 | #ifdef tc_print_statistics |
| 1050 | tc_print_statistics (stderr); |
| 1051 | #endif |
| 1052 | |
| 1053 | #ifdef obj_print_statistics |
| 1054 | obj_print_statistics (stderr); |
| 1055 | #endif |
| 1056 | } |
| 1057 | |
| 1058 | static void |
| 1059 | close_output_file (void) |
| 1060 | { |
| 1061 | output_file_close (out_file_name); |
| 1062 | if (!keep_it) |
| 1063 | unlink_if_ordinary (out_file_name); |
| 1064 | } |
| 1065 | |
| 1066 | /* The interface between the macro code and gas expression handling. */ |
| 1067 | |
| 1068 | static size_t |
| 1069 | macro_expr (const char *emsg, size_t idx, sb *in, offsetT *val) |
| 1070 | { |
| 1071 | char *hold; |
| 1072 | expressionS ex; |
| 1073 | |
| 1074 | sb_terminate (in); |
| 1075 | |
| 1076 | hold = input_line_pointer; |
| 1077 | input_line_pointer = in->ptr + idx; |
| 1078 | expression_and_evaluate (&ex); |
| 1079 | idx = input_line_pointer - in->ptr; |
| 1080 | input_line_pointer = hold; |
| 1081 | |
| 1082 | if (ex.X_op != O_constant) |
| 1083 | as_bad ("%s", emsg); |
| 1084 | |
| 1085 | *val = ex.X_add_number; |
| 1086 | |
| 1087 | return idx; |
| 1088 | } |
| 1089 | \f |
| 1090 | /* Here to attempt 1 pass over each input file. |
| 1091 | We scan argv[*] looking for filenames or exactly "" which is |
| 1092 | shorthand for stdin. Any argv that is NULL is not a file-name. |
| 1093 | We set need_pass_2 TRUE if, after this, we still have unresolved |
| 1094 | expressions of the form (unknown value)+-(unknown value). |
| 1095 | |
| 1096 | Note the un*x semantics: there is only 1 logical input file, but it |
| 1097 | may be a catenation of many 'physical' input files. */ |
| 1098 | |
| 1099 | static void |
| 1100 | perform_an_assembly_pass (int argc, char ** argv) |
| 1101 | { |
| 1102 | int saw_a_file = 0; |
| 1103 | #ifndef OBJ_MACH_O |
| 1104 | flagword applicable; |
| 1105 | #endif |
| 1106 | |
| 1107 | need_pass_2 = 0; |
| 1108 | |
| 1109 | #ifndef OBJ_MACH_O |
| 1110 | /* Create the standard sections, and those the assembler uses |
| 1111 | internally. */ |
| 1112 | text_section = subseg_new (TEXT_SECTION_NAME, 0); |
| 1113 | data_section = subseg_new (DATA_SECTION_NAME, 0); |
| 1114 | bss_section = subseg_new (BSS_SECTION_NAME, 0); |
| 1115 | /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed |
| 1116 | to have relocs, otherwise we don't find out in time. */ |
| 1117 | applicable = bfd_applicable_section_flags (stdoutput); |
| 1118 | bfd_set_section_flags (stdoutput, text_section, |
| 1119 | applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC |
| 1120 | | SEC_CODE | SEC_READONLY)); |
| 1121 | bfd_set_section_flags (stdoutput, data_section, |
| 1122 | applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC |
| 1123 | | SEC_DATA)); |
| 1124 | bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC); |
| 1125 | seg_info (bss_section)->bss = 1; |
| 1126 | #endif |
| 1127 | subseg_new (BFD_ABS_SECTION_NAME, 0); |
| 1128 | subseg_new (BFD_UND_SECTION_NAME, 0); |
| 1129 | reg_section = subseg_new ("*GAS `reg' section*", 0); |
| 1130 | expr_section = subseg_new ("*GAS `expr' section*", 0); |
| 1131 | |
| 1132 | #ifndef OBJ_MACH_O |
| 1133 | subseg_set (text_section, 0); |
| 1134 | #endif |
| 1135 | |
| 1136 | /* This may add symbol table entries, which requires having an open BFD, |
| 1137 | and sections already created. */ |
| 1138 | md_begin (); |
| 1139 | |
| 1140 | #ifdef USING_CGEN |
| 1141 | gas_cgen_begin (); |
| 1142 | #endif |
| 1143 | #ifdef obj_begin |
| 1144 | obj_begin (); |
| 1145 | #endif |
| 1146 | |
| 1147 | /* Skip argv[0]. */ |
| 1148 | argv++; |
| 1149 | argc--; |
| 1150 | |
| 1151 | while (argc--) |
| 1152 | { |
| 1153 | if (*argv) |
| 1154 | { /* Is it a file-name argument? */ |
| 1155 | PROGRESS (1); |
| 1156 | saw_a_file++; |
| 1157 | /* argv->"" if stdin desired, else->filename. */ |
| 1158 | read_a_source_file (*argv); |
| 1159 | } |
| 1160 | argv++; /* Completed that argv. */ |
| 1161 | } |
| 1162 | if (!saw_a_file) |
| 1163 | read_a_source_file (""); |
| 1164 | } |
| 1165 | \f |
| 1166 | |
| 1167 | int |
| 1168 | main (int argc, char ** argv) |
| 1169 | { |
| 1170 | char ** argv_orig = argv; |
| 1171 | |
| 1172 | int macro_strip_at; |
| 1173 | |
| 1174 | start_time = get_run_time (); |
| 1175 | #ifdef HAVE_SBRK |
| 1176 | start_sbrk = (char *) sbrk (0); |
| 1177 | #endif |
| 1178 | |
| 1179 | #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) |
| 1180 | setlocale (LC_MESSAGES, ""); |
| 1181 | #endif |
| 1182 | #if defined (HAVE_SETLOCALE) |
| 1183 | setlocale (LC_CTYPE, ""); |
| 1184 | #endif |
| 1185 | bindtextdomain (PACKAGE, LOCALEDIR); |
| 1186 | textdomain (PACKAGE); |
| 1187 | |
| 1188 | if (debug_memory) |
| 1189 | chunksize = 64; |
| 1190 | |
| 1191 | #ifdef HOST_SPECIAL_INIT |
| 1192 | HOST_SPECIAL_INIT (argc, argv); |
| 1193 | #endif |
| 1194 | |
| 1195 | myname = argv[0]; |
| 1196 | xmalloc_set_program_name (myname); |
| 1197 | |
| 1198 | expandargv (&argc, &argv); |
| 1199 | |
| 1200 | START_PROGRESS (myname, 0); |
| 1201 | |
| 1202 | #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME |
| 1203 | #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out" |
| 1204 | #endif |
| 1205 | |
| 1206 | out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME; |
| 1207 | |
| 1208 | hex_init (); |
| 1209 | bfd_init (); |
| 1210 | bfd_set_error_program_name (myname); |
| 1211 | |
| 1212 | #ifdef USE_EMULATIONS |
| 1213 | select_emulation_mode (argc, argv); |
| 1214 | #endif |
| 1215 | |
| 1216 | PROGRESS (1); |
| 1217 | /* Call parse_args before any of the init/begin functions |
| 1218 | so that switches like --hash-size can be honored. */ |
| 1219 | parse_args (&argc, &argv); |
| 1220 | symbol_begin (); |
| 1221 | frag_init (); |
| 1222 | subsegs_begin (); |
| 1223 | read_begin (); |
| 1224 | input_scrub_begin (); |
| 1225 | expr_begin (); |
| 1226 | |
| 1227 | /* It has to be called after dump_statistics (). */ |
| 1228 | xatexit (close_output_file); |
| 1229 | |
| 1230 | if (flag_print_statistics) |
| 1231 | xatexit (dump_statistics); |
| 1232 | |
| 1233 | macro_strip_at = 0; |
| 1234 | #ifdef TC_I960 |
| 1235 | macro_strip_at = flag_mri; |
| 1236 | #endif |
| 1237 | |
| 1238 | macro_init (flag_macro_alternate, flag_mri, macro_strip_at, macro_expr); |
| 1239 | |
| 1240 | PROGRESS (1); |
| 1241 | |
| 1242 | output_file_create (out_file_name); |
| 1243 | gas_assert (stdoutput != 0); |
| 1244 | |
| 1245 | dot_symbol_init (); |
| 1246 | |
| 1247 | #ifdef tc_init_after_args |
| 1248 | tc_init_after_args (); |
| 1249 | #endif |
| 1250 | |
| 1251 | itbl_init (); |
| 1252 | |
| 1253 | dwarf2_init (); |
| 1254 | |
| 1255 | local_symbol_make (".gasversion.", absolute_section, |
| 1256 | BFD_VERSION / 10000UL, &predefined_address_frag); |
| 1257 | |
| 1258 | /* Now that we have fully initialized, and have created the output |
| 1259 | file, define any symbols requested by --defsym command line |
| 1260 | arguments. */ |
| 1261 | while (defsyms != NULL) |
| 1262 | { |
| 1263 | symbolS *sym; |
| 1264 | struct defsym_list *next; |
| 1265 | |
| 1266 | sym = symbol_new (defsyms->name, absolute_section, defsyms->value, |
| 1267 | &zero_address_frag); |
| 1268 | /* Make symbols defined on the command line volatile, so that they |
| 1269 | can be redefined inside a source file. This makes this assembler's |
| 1270 | behaviour compatible with earlier versions, but it may not be |
| 1271 | completely intuitive. */ |
| 1272 | S_SET_VOLATILE (sym); |
| 1273 | symbol_table_insert (sym); |
| 1274 | next = defsyms->next; |
| 1275 | free (defsyms); |
| 1276 | defsyms = next; |
| 1277 | } |
| 1278 | |
| 1279 | PROGRESS (1); |
| 1280 | |
| 1281 | /* Assemble it. */ |
| 1282 | perform_an_assembly_pass (argc, argv); |
| 1283 | |
| 1284 | cond_finish_check (-1); |
| 1285 | |
| 1286 | #ifdef md_end |
| 1287 | md_end (); |
| 1288 | #endif |
| 1289 | |
| 1290 | #if defined OBJ_ELF || defined OBJ_MAYBE_ELF |
| 1291 | if ((flag_execstack || flag_noexecstack) |
| 1292 | && OUTPUT_FLAVOR == bfd_target_elf_flavour) |
| 1293 | { |
| 1294 | segT gnustack; |
| 1295 | |
| 1296 | gnustack = subseg_new (".note.GNU-stack", 0); |
| 1297 | bfd_set_section_flags (stdoutput, gnustack, |
| 1298 | SEC_READONLY | (flag_execstack ? SEC_CODE : 0)); |
| 1299 | |
| 1300 | } |
| 1301 | #endif |
| 1302 | |
| 1303 | /* If we've been collecting dwarf2 .debug_line info, either for |
| 1304 | assembly debugging or on behalf of the compiler, emit it now. */ |
| 1305 | dwarf2_finish (); |
| 1306 | |
| 1307 | /* If we constructed dwarf2 .eh_frame info, either via .cfi |
| 1308 | directives from the user or by the backend, emit it now. */ |
| 1309 | cfi_finish (); |
| 1310 | |
| 1311 | keep_it = 0; |
| 1312 | if (seen_at_least_1_file ()) |
| 1313 | { |
| 1314 | int n_warns, n_errs; |
| 1315 | char warn_msg[50]; |
| 1316 | char err_msg[50]; |
| 1317 | |
| 1318 | write_object_file (); |
| 1319 | |
| 1320 | n_warns = had_warnings (); |
| 1321 | n_errs = had_errors (); |
| 1322 | |
| 1323 | if (n_warns == 1) |
| 1324 | sprintf (warn_msg, _("%d warning"), n_warns); |
| 1325 | else |
| 1326 | sprintf (warn_msg, _("%d warnings"), n_warns); |
| 1327 | if (n_errs == 1) |
| 1328 | sprintf (err_msg, _("%d error"), n_errs); |
| 1329 | else |
| 1330 | sprintf (err_msg, _("%d errors"), n_errs); |
| 1331 | |
| 1332 | if (flag_fatal_warnings && n_warns != 0) |
| 1333 | { |
| 1334 | if (n_errs == 0) |
| 1335 | as_bad (_("%s, treating warnings as errors"), warn_msg); |
| 1336 | n_errs += n_warns; |
| 1337 | } |
| 1338 | |
| 1339 | if (n_errs == 0) |
| 1340 | keep_it = 1; |
| 1341 | else if (flag_always_generate_output) |
| 1342 | { |
| 1343 | /* The -Z flag indicates that an object file should be generated, |
| 1344 | regardless of warnings and errors. */ |
| 1345 | keep_it = 1; |
| 1346 | fprintf (stderr, _("%s, %s, generating bad object file\n"), |
| 1347 | err_msg, warn_msg); |
| 1348 | } |
| 1349 | } |
| 1350 | |
| 1351 | fflush (stderr); |
| 1352 | |
| 1353 | #ifndef NO_LISTING |
| 1354 | listing_print (listing_filename, argv_orig); |
| 1355 | #endif |
| 1356 | |
| 1357 | input_scrub_end (); |
| 1358 | |
| 1359 | END_PROGRESS (myname); |
| 1360 | |
| 1361 | /* Use xexit instead of return, because under VMS environments they |
| 1362 | may not place the same interpretation on the value given. */ |
| 1363 | if (had_errors () != 0) |
| 1364 | xexit (EXIT_FAILURE); |
| 1365 | |
| 1366 | /* Only generate dependency file if assembler was successful. */ |
| 1367 | print_dependencies (); |
| 1368 | |
| 1369 | xexit (EXIT_SUCCESS); |
| 1370 | } |