| 1 | /* as.c - GAS main program. |
| 2 | Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
| 3 | 1999, 2000, 2001 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GAS, the GNU Assembler. |
| 7 | |
| 8 | GAS is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2, or (at your option) |
| 11 | any later version. |
| 12 | |
| 13 | GAS is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with GAS; see the file COPYING. If not, write to the Free |
| 20 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
| 21 | 02111-1307, USA. */ |
| 22 | |
| 23 | /* Main program for AS; a 32-bit assembler of GNU. |
| 24 | * Understands command arguments. |
| 25 | * Has a few routines that don't fit in other modules because they |
| 26 | * are shared. |
| 27 | * |
| 28 | * bugs |
| 29 | * |
| 30 | * : initialisers |
| 31 | * Since no-one else says they will support them in future: I |
| 32 | * don't support them now. |
| 33 | */ |
| 34 | |
| 35 | #include "ansidecl.h" |
| 36 | |
| 37 | #define COMMON |
| 38 | |
| 39 | #include "as.h" |
| 40 | #include "subsegs.h" |
| 41 | #include "output-file.h" |
| 42 | #include "sb.h" |
| 43 | #include "macro.h" |
| 44 | #include "dwarf2dbg.h" |
| 45 | |
| 46 | #ifdef HAVE_ITBL_CPU |
| 47 | #include "itbl-ops.h" |
| 48 | #else |
| 49 | #define itbl_parse(itbl_file) 1 |
| 50 | #define itbl_init() |
| 51 | #endif |
| 52 | |
| 53 | #ifdef HAVE_SBRK |
| 54 | #ifdef NEED_DECLARATION_SBRK |
| 55 | extern PTR sbrk (); |
| 56 | #endif |
| 57 | #endif |
| 58 | |
| 59 | static void show_usage PARAMS ((FILE *)); |
| 60 | static void parse_args PARAMS ((int *, char ***)); |
| 61 | static void dump_statistics PARAMS ((void)); |
| 62 | static void perform_an_assembly_pass PARAMS ((int argc, char **argv)); |
| 63 | static int macro_expr PARAMS ((const char *, int, sb *, int *)); |
| 64 | |
| 65 | /* True if a listing is wanted. */ |
| 66 | int listing; |
| 67 | |
| 68 | /* Name of listing file. */ |
| 69 | static char *listing_filename = NULL; |
| 70 | |
| 71 | /* Type of debugging to generate. */ |
| 72 | |
| 73 | enum debug_info_type debug_type = DEBUG_UNSPECIFIED; |
| 74 | |
| 75 | /* Maximum level of macro nesting. */ |
| 76 | int max_macro_nest = 100; |
| 77 | |
| 78 | /* argv[0] */ |
| 79 | char *myname; |
| 80 | #ifdef BFD_ASSEMBLER |
| 81 | segT reg_section, expr_section; |
| 82 | segT text_section, data_section, bss_section; |
| 83 | #endif |
| 84 | |
| 85 | /* The default obstack chunk size. If we set this to zero, the |
| 86 | obstack code will use whatever will fit in a 4096 byte block. */ |
| 87 | int chunksize = 0; |
| 88 | |
| 89 | /* To monitor memory allocation more effectively, make this non-zero. |
| 90 | Then the chunk sizes for gas and bfd will be reduced. */ |
| 91 | int debug_memory = 0; |
| 92 | |
| 93 | /* We build a list of defsyms as we read the options, and then define |
| 94 | them after we have initialized everything. */ |
| 95 | |
| 96 | struct defsym_list { |
| 97 | struct defsym_list *next; |
| 98 | char *name; |
| 99 | valueT value; |
| 100 | }; |
| 101 | |
| 102 | static struct defsym_list *defsyms; |
| 103 | |
| 104 | /* Keep a record of the itbl files we read in. */ |
| 105 | |
| 106 | struct itbl_file_list { |
| 107 | struct itbl_file_list *next; |
| 108 | char *name; |
| 109 | }; |
| 110 | |
| 111 | static struct itbl_file_list *itbl_files; |
| 112 | \f |
| 113 | #ifdef USE_EMULATIONS |
| 114 | #define EMULATION_ENVIRON "AS_EMULATION" |
| 115 | |
| 116 | extern struct emulation mipsbelf, mipslelf, mipself; |
| 117 | extern struct emulation mipsbecoff, mipslecoff, mipsecoff; |
| 118 | extern struct emulation i386coff, i386elf, i386aout; |
| 119 | extern struct emulation crisaout, criself; |
| 120 | |
| 121 | static struct emulation *const emulations[] = { EMULATIONS }; |
| 122 | static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]); |
| 123 | |
| 124 | static void select_emulation_mode PARAMS ((int, char **)); |
| 125 | |
| 126 | static void |
| 127 | select_emulation_mode (argc, argv) |
| 128 | int argc; |
| 129 | char **argv; |
| 130 | { |
| 131 | int i; |
| 132 | char *p, *em = 0; |
| 133 | |
| 134 | for (i = 1; i < argc; i++) |
| 135 | if (!strncmp ("--em", argv[i], 4)) |
| 136 | break; |
| 137 | |
| 138 | if (i == argc) |
| 139 | goto do_default; |
| 140 | |
| 141 | p = strchr (argv[i], '='); |
| 142 | if (p) |
| 143 | p++; |
| 144 | else |
| 145 | p = argv[i + 1]; |
| 146 | |
| 147 | if (!p || !*p) |
| 148 | as_fatal (_("missing emulation mode name")); |
| 149 | em = p; |
| 150 | |
| 151 | do_default: |
| 152 | if (em == 0) |
| 153 | em = getenv (EMULATION_ENVIRON); |
| 154 | if (em == 0) |
| 155 | em = DEFAULT_EMULATION; |
| 156 | |
| 157 | if (em) |
| 158 | { |
| 159 | for (i = 0; i < n_emulations; i++) |
| 160 | if (!strcmp (emulations[i]->name, em)) |
| 161 | break; |
| 162 | if (i == n_emulations) |
| 163 | as_fatal (_("unrecognized emulation name `%s'"), em); |
| 164 | this_emulation = emulations[i]; |
| 165 | } |
| 166 | else |
| 167 | this_emulation = emulations[0]; |
| 168 | |
| 169 | this_emulation->init (); |
| 170 | } |
| 171 | |
| 172 | const char * |
| 173 | default_emul_bfd_name () |
| 174 | { |
| 175 | abort (); |
| 176 | return NULL; |
| 177 | } |
| 178 | |
| 179 | void |
| 180 | common_emul_init () |
| 181 | { |
| 182 | this_format = this_emulation->format; |
| 183 | |
| 184 | if (this_emulation->leading_underscore == 2) |
| 185 | this_emulation->leading_underscore = this_format->dfl_leading_underscore; |
| 186 | |
| 187 | if (this_emulation->default_endian != 2) |
| 188 | target_big_endian = this_emulation->default_endian; |
| 189 | |
| 190 | if (this_emulation->fake_label_name == 0) |
| 191 | { |
| 192 | if (this_emulation->leading_underscore) |
| 193 | this_emulation->fake_label_name = "L0\001"; |
| 194 | else |
| 195 | /* What other parameters should we test? */ |
| 196 | this_emulation->fake_label_name = ".L0\001"; |
| 197 | } |
| 198 | } |
| 199 | #endif |
| 200 | |
| 201 | void |
| 202 | print_version_id () |
| 203 | { |
| 204 | static int printed; |
| 205 | if (printed) |
| 206 | return; |
| 207 | printed = 1; |
| 208 | |
| 209 | #ifdef BFD_ASSEMBLER |
| 210 | fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s"), |
| 211 | VERSION, TARGET_ALIAS, BFD_VERSION); |
| 212 | #else |
| 213 | fprintf (stderr, _("GNU assembler version %s (%s)"), VERSION, TARGET_ALIAS); |
| 214 | #endif |
| 215 | fprintf (stderr, "\n"); |
| 216 | } |
| 217 | |
| 218 | static void |
| 219 | show_usage (stream) |
| 220 | FILE *stream; |
| 221 | { |
| 222 | fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname); |
| 223 | |
| 224 | fprintf (stream, _("\ |
| 225 | Options:\n\ |
| 226 | -a[sub-option...] turn on listings\n\ |
| 227 | Sub-options [default hls]:\n\ |
| 228 | c omit false conditionals\n\ |
| 229 | d omit debugging directives\n\ |
| 230 | h include high-level source\n\ |
| 231 | l include assembly\n\ |
| 232 | m include macro expansions\n\ |
| 233 | n omit forms processing\n\ |
| 234 | s include symbols\n\ |
| 235 | L include line debug statistics (if applicable)\n\ |
| 236 | =FILE list to FILE (must be last sub-option)\n")); |
| 237 | |
| 238 | fprintf (stream, _("\ |
| 239 | -D produce assembler debugging messages\n")); |
| 240 | fprintf (stream, _("\ |
| 241 | --defsym SYM=VAL define symbol SYM to given value\n")); |
| 242 | #ifdef USE_EMULATIONS |
| 243 | { |
| 244 | int i; |
| 245 | char *def_em; |
| 246 | |
| 247 | fprintf (stream, "\ |
| 248 | --em=["); |
| 249 | for (i = 0; i < n_emulations - 1; i++) |
| 250 | fprintf (stream, "%s | ", emulations[i]->name); |
| 251 | fprintf (stream, "%s]\n", emulations[i]->name); |
| 252 | |
| 253 | def_em = getenv (EMULATION_ENVIRON); |
| 254 | if (!def_em) |
| 255 | def_em = DEFAULT_EMULATION; |
| 256 | fprintf (stream, _("\ |
| 257 | emulate output (default %s)\n"), def_em); |
| 258 | } |
| 259 | #endif |
| 260 | fprintf (stream, _("\ |
| 261 | -f skip whitespace and comment preprocessing\n")); |
| 262 | fprintf (stream, _("\ |
| 263 | --gstabs generate stabs debugging information\n")); |
| 264 | fprintf (stream, _("\ |
| 265 | --gdwarf2 generate DWARF2 debugging information\n")); |
| 266 | fprintf (stream, _("\ |
| 267 | --help show this message and exit\n")); |
| 268 | fprintf (stream, _("\ |
| 269 | --target-help show target specific options\n")); |
| 270 | fprintf (stream, _("\ |
| 271 | -I DIR add DIR to search list for .include directives\n")); |
| 272 | fprintf (stream, _("\ |
| 273 | -J don't warn about signed overflow\n")); |
| 274 | fprintf (stream, _("\ |
| 275 | -K warn when differences altered for long displacements\n")); |
| 276 | fprintf (stream, _("\ |
| 277 | -L,--keep-locals keep local symbols (e.g. starting with `L')\n")); |
| 278 | fprintf (stream, _("\ |
| 279 | -M,--mri assemble in MRI compatibility mode\n")); |
| 280 | fprintf (stream, _("\ |
| 281 | --MD FILE write dependency information in FILE (default none)\n")); |
| 282 | fprintf (stream, _("\ |
| 283 | -nocpp ignored\n")); |
| 284 | fprintf (stream, _("\ |
| 285 | -o OBJFILE name the object-file output OBJFILE (default a.out)\n")); |
| 286 | fprintf (stream, _("\ |
| 287 | -R fold data section into text section\n")); |
| 288 | fprintf (stream, _("\ |
| 289 | --statistics print various measured statistics from execution\n")); |
| 290 | fprintf (stream, _("\ |
| 291 | --strip-local-absolute strip local absolute symbols\n")); |
| 292 | fprintf (stream, _("\ |
| 293 | --traditional-format Use same format as native assembler when possible\n")); |
| 294 | fprintf (stream, _("\ |
| 295 | --version print assembler version number and exit\n")); |
| 296 | fprintf (stream, _("\ |
| 297 | -W --no-warn suppress warnings\n")); |
| 298 | fprintf (stream, _("\ |
| 299 | --warn don't suppress warnings\n")); |
| 300 | fprintf (stream, _("\ |
| 301 | --fatal-warnings treat warnings as errors\n")); |
| 302 | fprintf (stream, _("\ |
| 303 | --itbl INSTTBL extend instruction set to include instructions\n\ |
| 304 | matching the specifications defined in file INSTTBL\n")); |
| 305 | fprintf (stream, _("\ |
| 306 | -w ignored\n")); |
| 307 | fprintf (stream, _("\ |
| 308 | -X ignored\n")); |
| 309 | fprintf (stream, _("\ |
| 310 | -Z generate object file even after errors\n")); |
| 311 | fprintf (stream, _("\ |
| 312 | --listing-lhs-width set the width in words of the output data column of\n\ |
| 313 | the listing\n")); |
| 314 | fprintf (stream, _("\ |
| 315 | --listing-lhs-width2 set the width in words of the continuation lines\n\ |
| 316 | of the output data column; ignored if smaller than\n\ |
| 317 | the width of the first line\n")); |
| 318 | fprintf (stream, _("\ |
| 319 | --listing-rhs-width set the max width in characters of the lines from\n\ |
| 320 | the source file\n")); |
| 321 | fprintf (stream, _("\ |
| 322 | --listing-cont-lines set the maximum number of continuation lines used\n\ |
| 323 | for the output data column of the listing\n")); |
| 324 | |
| 325 | md_show_usage (stream); |
| 326 | |
| 327 | fputc ('\n', stream); |
| 328 | fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO); |
| 329 | } |
| 330 | |
| 331 | /* Since it is easy to do here we interpret the special arg "-" |
| 332 | to mean "use stdin" and we set that argv[] pointing to "". |
| 333 | After we have munged argv[], the only things left are source file |
| 334 | name(s) and ""(s) denoting stdin. These file names are used |
| 335 | (perhaps more than once) later. |
| 336 | |
| 337 | check for new machine-dep cmdline options in |
| 338 | md_parse_option definitions in config/tc-*.c. */ |
| 339 | |
| 340 | static void |
| 341 | parse_args (pargc, pargv) |
| 342 | int *pargc; |
| 343 | char ***pargv; |
| 344 | { |
| 345 | int old_argc, new_argc; |
| 346 | char **old_argv, **new_argv; |
| 347 | |
| 348 | /* Starting the short option string with '-' is for programs that |
| 349 | expect options and other ARGV-elements in any order and that care about |
| 350 | the ordering of the two. We describe each non-option ARGV-element |
| 351 | as if it were the argument of an option with character code 1. */ |
| 352 | |
| 353 | char *shortopts; |
| 354 | extern CONST char *md_shortopts; |
| 355 | static const char std_shortopts[] = { |
| 356 | '-', 'J', |
| 357 | #ifndef WORKING_DOT_WORD |
| 358 | /* -K is not meaningful if .word is not being hacked. */ |
| 359 | 'K', |
| 360 | #endif |
| 361 | 'L', 'M', 'R', 'W', 'Z', 'f', 'a', ':', ':', 'D', 'I', ':', 'o', ':', |
| 362 | #ifndef VMS |
| 363 | /* -v takes an argument on VMS, so we don't make it a generic |
| 364 | option. */ |
| 365 | 'v', |
| 366 | #endif |
| 367 | 'w', 'X', |
| 368 | /* New option for extending instruction set (see also --itbl below) */ |
| 369 | 't', ':', |
| 370 | '\0' |
| 371 | }; |
| 372 | struct option *longopts; |
| 373 | extern struct option md_longopts[]; |
| 374 | extern size_t md_longopts_size; |
| 375 | static const struct option std_longopts[] = { |
| 376 | #define OPTION_HELP (OPTION_STD_BASE) |
| 377 | {"help", no_argument, NULL, OPTION_HELP}, |
| 378 | {"keep-locals", no_argument, NULL, 'L'}, |
| 379 | {"mri", no_argument, NULL, 'M'}, |
| 380 | #define OPTION_NOCPP (OPTION_STD_BASE + 1) |
| 381 | {"nocpp", no_argument, NULL, OPTION_NOCPP}, |
| 382 | #define OPTION_STATISTICS (OPTION_STD_BASE + 2) |
| 383 | {"statistics", no_argument, NULL, OPTION_STATISTICS}, |
| 384 | #define OPTION_VERSION (OPTION_STD_BASE + 3) |
| 385 | {"version", no_argument, NULL, OPTION_VERSION}, |
| 386 | #define OPTION_DUMPCONFIG (OPTION_STD_BASE + 4) |
| 387 | {"dump-config", no_argument, NULL, OPTION_DUMPCONFIG}, |
| 388 | #define OPTION_VERBOSE (OPTION_STD_BASE + 5) |
| 389 | {"verbose", no_argument, NULL, OPTION_VERBOSE}, |
| 390 | #define OPTION_EMULATION (OPTION_STD_BASE + 6) |
| 391 | {"emulation", required_argument, NULL, OPTION_EMULATION}, |
| 392 | #define OPTION_DEFSYM (OPTION_STD_BASE + 7) |
| 393 | {"defsym", required_argument, NULL, OPTION_DEFSYM}, |
| 394 | #define OPTION_INSTTBL (OPTION_STD_BASE + 8) |
| 395 | /* New option for extending instruction set (see also -t above). |
| 396 | The "-t file" or "--itbl file" option extends the basic set of |
| 397 | valid instructions by reading "file", a text file containing a |
| 398 | list of instruction formats. The additional opcodes and their |
| 399 | formats are added to the built-in set of instructions, and |
| 400 | mnemonics for new registers may also be defined. */ |
| 401 | {"itbl", required_argument, NULL, OPTION_INSTTBL}, |
| 402 | #define OPTION_LISTING_LHS_WIDTH (OPTION_STD_BASE + 9) |
| 403 | {"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH}, |
| 404 | #define OPTION_LISTING_LHS_WIDTH2 (OPTION_STD_BASE + 10) |
| 405 | {"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2}, |
| 406 | #define OPTION_LISTING_RHS_WIDTH (OPTION_STD_BASE + 11) |
| 407 | {"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH}, |
| 408 | #define OPTION_LISTING_CONT_LINES (OPTION_STD_BASE + 12) |
| 409 | {"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES}, |
| 410 | #define OPTION_DEPFILE (OPTION_STD_BASE + 13) |
| 411 | {"MD", required_argument, NULL, OPTION_DEPFILE}, |
| 412 | #define OPTION_GSTABS (OPTION_STD_BASE + 14) |
| 413 | {"gstabs", no_argument, NULL, OPTION_GSTABS}, |
| 414 | #define OPTION_STRIP_LOCAL_ABSOLUTE (OPTION_STD_BASE + 15) |
| 415 | {"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE}, |
| 416 | #define OPTION_TRADITIONAL_FORMAT (OPTION_STD_BASE + 16) |
| 417 | {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT}, |
| 418 | #define OPTION_GDWARF2 (OPTION_STD_BASE + 17) |
| 419 | {"gdwarf2", no_argument, NULL, OPTION_GDWARF2}, |
| 420 | {"no-warn", no_argument, NULL, 'W'}, |
| 421 | #define OPTION_WARN (OPTION_STD_BASE + 18) |
| 422 | {"warn", no_argument, NULL, OPTION_WARN}, |
| 423 | #define OPTION_TARGET_HELP (OPTION_STD_BASE + 19) |
| 424 | {"target-help", no_argument, NULL, OPTION_TARGET_HELP}, |
| 425 | #define OPTION_WARN_FATAL (OPTION_STD_BASE + 20) |
| 426 | {"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL} |
| 427 | /* When you add options here, check that they do not collide with |
| 428 | OPTION_MD_BASE. See as.h. */ |
| 429 | }; |
| 430 | |
| 431 | /* Construct the option lists from the standard list and the target |
| 432 | dependent list. Include space for an extra NULL option and |
| 433 | always NULL terminate. */ |
| 434 | shortopts = concat (std_shortopts, md_shortopts, (char *) NULL); |
| 435 | longopts = (struct option *) xmalloc (sizeof (std_longopts) |
| 436 | + md_longopts_size |
| 437 | + sizeof (struct option)); |
| 438 | memcpy (longopts, std_longopts, sizeof (std_longopts)); |
| 439 | memcpy ((char *) longopts + sizeof (std_longopts), |
| 440 | md_longopts, md_longopts_size); |
| 441 | memset ((char *) longopts + sizeof (std_longopts) + md_longopts_size, |
| 442 | 0, sizeof (struct option)); |
| 443 | |
| 444 | /* Make a local copy of the old argv. */ |
| 445 | old_argc = *pargc; |
| 446 | old_argv = *pargv; |
| 447 | |
| 448 | /* Initialize a new argv that contains no options. */ |
| 449 | new_argv = (char **) xmalloc (sizeof (char *) * (old_argc + 1)); |
| 450 | new_argv[0] = old_argv[0]; |
| 451 | new_argc = 1; |
| 452 | new_argv[new_argc] = NULL; |
| 453 | |
| 454 | while (1) |
| 455 | { |
| 456 | /* getopt_long_only is like getopt_long, but '-' as well as '--' can |
| 457 | indicate a long option. */ |
| 458 | int longind; |
| 459 | int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts, |
| 460 | &longind); |
| 461 | |
| 462 | if (optc == -1) |
| 463 | break; |
| 464 | |
| 465 | switch (optc) |
| 466 | { |
| 467 | default: |
| 468 | /* md_parse_option should return 1 if it recognizes optc, |
| 469 | 0 if not. */ |
| 470 | if (md_parse_option (optc, optarg) != 0) |
| 471 | break; |
| 472 | /* `-v' isn't included in the general short_opts list, so check for |
| 473 | it explicity here before deciding we've gotten a bad argument. */ |
| 474 | if (optc == 'v') |
| 475 | { |
| 476 | #ifdef VMS |
| 477 | /* Telling getopt to treat -v's value as optional can result |
| 478 | in it picking up a following filename argument here. The |
| 479 | VMS code in md_parse_option can return 0 in that case, |
| 480 | but it has no way of pushing the filename argument back. */ |
| 481 | if (optarg && *optarg) |
| 482 | new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL; |
| 483 | else |
| 484 | #else |
| 485 | case 'v': |
| 486 | #endif |
| 487 | case OPTION_VERBOSE: |
| 488 | print_version_id (); |
| 489 | break; |
| 490 | } |
| 491 | /* Fall through. */ |
| 492 | |
| 493 | case '?': |
| 494 | exit (EXIT_FAILURE); |
| 495 | |
| 496 | case 1: /* File name. */ |
| 497 | if (!strcmp (optarg, "-")) |
| 498 | optarg = ""; |
| 499 | new_argv[new_argc++] = optarg; |
| 500 | new_argv[new_argc] = NULL; |
| 501 | break; |
| 502 | |
| 503 | case OPTION_TARGET_HELP: |
| 504 | md_show_usage (stdout); |
| 505 | exit (EXIT_SUCCESS); |
| 506 | |
| 507 | case OPTION_HELP: |
| 508 | show_usage (stdout); |
| 509 | exit (EXIT_SUCCESS); |
| 510 | |
| 511 | case OPTION_NOCPP: |
| 512 | break; |
| 513 | |
| 514 | case OPTION_STATISTICS: |
| 515 | flag_print_statistics = 1; |
| 516 | break; |
| 517 | |
| 518 | case OPTION_STRIP_LOCAL_ABSOLUTE: |
| 519 | flag_strip_local_absolute = 1; |
| 520 | break; |
| 521 | |
| 522 | case OPTION_TRADITIONAL_FORMAT: |
| 523 | flag_traditional_format = 1; |
| 524 | break; |
| 525 | |
| 526 | case OPTION_VERSION: |
| 527 | /* This output is intended to follow the GNU standards document. */ |
| 528 | printf (_("GNU assembler %s\n"), VERSION); |
| 529 | printf (_("Copyright 2001 Free Software Foundation, Inc.\n")); |
| 530 | printf (_("\ |
| 531 | This program is free software; you may redistribute it under the terms of\n\ |
| 532 | the GNU General Public License. This program has absolutely no warranty.\n")); |
| 533 | printf (_("This assembler was configured for a target of `%s'.\n"), |
| 534 | TARGET_ALIAS); |
| 535 | exit (EXIT_SUCCESS); |
| 536 | |
| 537 | case OPTION_EMULATION: |
| 538 | #ifdef USE_EMULATIONS |
| 539 | if (strcmp (optarg, this_emulation->name)) |
| 540 | as_fatal (_("multiple emulation names specified")); |
| 541 | #else |
| 542 | as_fatal (_("emulations not handled in this configuration")); |
| 543 | #endif |
| 544 | break; |
| 545 | |
| 546 | case OPTION_DUMPCONFIG: |
| 547 | fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS); |
| 548 | fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL); |
| 549 | fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU); |
| 550 | #ifdef TARGET_OBJ_FORMAT |
| 551 | fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT); |
| 552 | #endif |
| 553 | #ifdef TARGET_FORMAT |
| 554 | fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT); |
| 555 | #endif |
| 556 | exit (EXIT_SUCCESS); |
| 557 | |
| 558 | case OPTION_DEFSYM: |
| 559 | { |
| 560 | char *s; |
| 561 | valueT i; |
| 562 | struct defsym_list *n; |
| 563 | |
| 564 | for (s = optarg; *s != '\0' && *s != '='; s++) |
| 565 | ; |
| 566 | if (*s == '\0') |
| 567 | as_fatal (_("bad defsym; format is --defsym name=value")); |
| 568 | *s++ = '\0'; |
| 569 | #ifdef BFD_ASSEMBLER |
| 570 | i = bfd_scan_vma (s, (const char **) NULL, 0); |
| 571 | #else |
| 572 | i = strtol (s, (char **) NULL, 0); |
| 573 | #endif |
| 574 | n = (struct defsym_list *) xmalloc (sizeof *n); |
| 575 | n->next = defsyms; |
| 576 | n->name = optarg; |
| 577 | n->value = i; |
| 578 | defsyms = n; |
| 579 | } |
| 580 | break; |
| 581 | |
| 582 | case OPTION_INSTTBL: |
| 583 | case 't': |
| 584 | { |
| 585 | /* optarg is the name of the file containing the instruction |
| 586 | formats, opcodes, register names, etc. */ |
| 587 | struct itbl_file_list *n; |
| 588 | |
| 589 | if (optarg == NULL) |
| 590 | { |
| 591 | as_warn (_("No file name following -t option\n")); |
| 592 | break; |
| 593 | } |
| 594 | |
| 595 | n = (struct itbl_file_list *) xmalloc (sizeof *n); |
| 596 | n->next = itbl_files; |
| 597 | n->name = optarg; |
| 598 | itbl_files = n; |
| 599 | |
| 600 | /* Parse the file and add the new instructions to our internal |
| 601 | table. If multiple instruction tables are specified, the |
| 602 | information from this table gets appended onto the existing |
| 603 | internal table. */ |
| 604 | itbl_files->name = xstrdup (optarg); |
| 605 | if (itbl_parse (itbl_files->name) != 0) |
| 606 | { |
| 607 | fprintf (stderr, _("Failed to read instruction table %s\n"), |
| 608 | itbl_files->name); |
| 609 | exit (EXIT_SUCCESS); |
| 610 | } |
| 611 | } |
| 612 | break; |
| 613 | |
| 614 | case OPTION_DEPFILE: |
| 615 | start_dependencies (optarg); |
| 616 | break; |
| 617 | |
| 618 | case OPTION_GSTABS: |
| 619 | debug_type = DEBUG_STABS; |
| 620 | break; |
| 621 | |
| 622 | case OPTION_GDWARF2: |
| 623 | debug_type = DEBUG_DWARF2; |
| 624 | break; |
| 625 | |
| 626 | case 'J': |
| 627 | flag_signed_overflow_ok = 1; |
| 628 | break; |
| 629 | |
| 630 | #ifndef WORKING_DOT_WORD |
| 631 | case 'K': |
| 632 | flag_warn_displacement = 1; |
| 633 | break; |
| 634 | #endif |
| 635 | |
| 636 | case 'L': |
| 637 | flag_keep_locals = 1; |
| 638 | break; |
| 639 | |
| 640 | case OPTION_LISTING_LHS_WIDTH: |
| 641 | listing_lhs_width = atoi (optarg); |
| 642 | if (listing_lhs_width_second < listing_lhs_width) |
| 643 | listing_lhs_width_second = listing_lhs_width; |
| 644 | break; |
| 645 | case OPTION_LISTING_LHS_WIDTH2: |
| 646 | { |
| 647 | int tmp = atoi (optarg); |
| 648 | if (tmp > listing_lhs_width) |
| 649 | listing_lhs_width_second = tmp; |
| 650 | } |
| 651 | break; |
| 652 | case OPTION_LISTING_RHS_WIDTH: |
| 653 | listing_rhs_width = atoi (optarg); |
| 654 | break; |
| 655 | case OPTION_LISTING_CONT_LINES: |
| 656 | listing_lhs_cont_lines = atoi (optarg); |
| 657 | break; |
| 658 | |
| 659 | case 'M': |
| 660 | flag_mri = 1; |
| 661 | #ifdef TC_M68K |
| 662 | flag_m68k_mri = 1; |
| 663 | #endif |
| 664 | break; |
| 665 | |
| 666 | case 'R': |
| 667 | flag_readonly_data_in_text = 1; |
| 668 | break; |
| 669 | |
| 670 | case 'W': |
| 671 | flag_no_warnings = 1; |
| 672 | break; |
| 673 | |
| 674 | case OPTION_WARN: |
| 675 | flag_no_warnings = 0; |
| 676 | flag_fatal_warnings = 0; |
| 677 | break; |
| 678 | |
| 679 | case OPTION_WARN_FATAL: |
| 680 | flag_no_warnings = 0; |
| 681 | flag_fatal_warnings = 1; |
| 682 | break; |
| 683 | |
| 684 | case 'Z': |
| 685 | flag_always_generate_output = 1; |
| 686 | break; |
| 687 | |
| 688 | case 'a': |
| 689 | if (optarg) |
| 690 | { |
| 691 | if (md_parse_option (optc, optarg) != 0) |
| 692 | break; |
| 693 | |
| 694 | while (*optarg) |
| 695 | { |
| 696 | switch (*optarg) |
| 697 | { |
| 698 | case 'c': |
| 699 | listing |= LISTING_NOCOND; |
| 700 | break; |
| 701 | case 'd': |
| 702 | listing |= LISTING_NODEBUG; |
| 703 | break; |
| 704 | case 'h': |
| 705 | listing |= LISTING_HLL; |
| 706 | break; |
| 707 | case 'l': |
| 708 | listing |= LISTING_LISTING; |
| 709 | break; |
| 710 | case 'm': |
| 711 | listing |= LISTING_MACEXP; |
| 712 | break; |
| 713 | case 'n': |
| 714 | listing |= LISTING_NOFORM; |
| 715 | break; |
| 716 | case 's': |
| 717 | listing |= LISTING_SYMBOLS; |
| 718 | break; |
| 719 | case '=': |
| 720 | listing_filename = xstrdup (optarg + 1); |
| 721 | optarg += strlen (listing_filename); |
| 722 | break; |
| 723 | default: |
| 724 | as_fatal (_("invalid listing option `%c'"), *optarg); |
| 725 | break; |
| 726 | } |
| 727 | optarg++; |
| 728 | } |
| 729 | } |
| 730 | if (!listing) |
| 731 | listing = LISTING_DEFAULT; |
| 732 | break; |
| 733 | |
| 734 | case 'D': |
| 735 | /* DEBUG is implemented: it debugs different |
| 736 | things from other people's assemblers. */ |
| 737 | flag_debug = 1; |
| 738 | break; |
| 739 | |
| 740 | case 'f': |
| 741 | flag_no_comments = 1; |
| 742 | break; |
| 743 | |
| 744 | case 'I': |
| 745 | { /* Include file directory. */ |
| 746 | char *temp = xstrdup (optarg); |
| 747 | add_include_dir (temp); |
| 748 | break; |
| 749 | } |
| 750 | |
| 751 | case 'o': |
| 752 | out_file_name = xstrdup (optarg); |
| 753 | break; |
| 754 | |
| 755 | case 'w': |
| 756 | break; |
| 757 | |
| 758 | case 'X': |
| 759 | /* -X means treat warnings as errors. */ |
| 760 | break; |
| 761 | } |
| 762 | } |
| 763 | |
| 764 | free (shortopts); |
| 765 | free (longopts); |
| 766 | |
| 767 | *pargc = new_argc; |
| 768 | *pargv = new_argv; |
| 769 | } |
| 770 | |
| 771 | static long start_time; |
| 772 | |
| 773 | int |
| 774 | main (argc, argv) |
| 775 | int argc; |
| 776 | char **argv; |
| 777 | { |
| 778 | int macro_alternate; |
| 779 | int macro_strip_at; |
| 780 | int keep_it; |
| 781 | |
| 782 | start_time = get_run_time (); |
| 783 | |
| 784 | #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) |
| 785 | setlocale (LC_MESSAGES, ""); |
| 786 | #endif |
| 787 | bindtextdomain (PACKAGE, LOCALEDIR); |
| 788 | textdomain (PACKAGE); |
| 789 | |
| 790 | if (debug_memory) |
| 791 | { |
| 792 | #ifdef BFD_ASSEMBLER |
| 793 | extern long _bfd_chunksize; |
| 794 | _bfd_chunksize = 64; |
| 795 | #endif |
| 796 | chunksize = 64; |
| 797 | } |
| 798 | |
| 799 | #ifdef HOST_SPECIAL_INIT |
| 800 | HOST_SPECIAL_INIT (argc, argv); |
| 801 | #endif |
| 802 | |
| 803 | myname = argv[0]; |
| 804 | xmalloc_set_program_name (myname); |
| 805 | |
| 806 | START_PROGRESS (myname, 0); |
| 807 | |
| 808 | #ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME |
| 809 | #define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out" |
| 810 | #endif |
| 811 | |
| 812 | out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME; |
| 813 | |
| 814 | hex_init (); |
| 815 | #ifdef BFD_ASSEMBLER |
| 816 | bfd_init (); |
| 817 | bfd_set_error_program_name (myname); |
| 818 | #endif |
| 819 | |
| 820 | #ifdef USE_EMULATIONS |
| 821 | select_emulation_mode (argc, argv); |
| 822 | #endif |
| 823 | |
| 824 | PROGRESS (1); |
| 825 | symbol_begin (); |
| 826 | frag_init (); |
| 827 | subsegs_begin (); |
| 828 | parse_args (&argc, &argv); |
| 829 | read_begin (); |
| 830 | input_scrub_begin (); |
| 831 | expr_begin (); |
| 832 | |
| 833 | if (flag_print_statistics) |
| 834 | xatexit (dump_statistics); |
| 835 | |
| 836 | macro_alternate = 0; |
| 837 | macro_strip_at = 0; |
| 838 | #ifdef TC_I960 |
| 839 | macro_strip_at = flag_mri; |
| 840 | #endif |
| 841 | #ifdef TC_A29K |
| 842 | /* For compatibility with the AMD 29K family macro assembler |
| 843 | specification. */ |
| 844 | macro_alternate = 1; |
| 845 | macro_strip_at = 1; |
| 846 | #endif |
| 847 | |
| 848 | macro_init (macro_alternate, flag_mri, macro_strip_at, macro_expr); |
| 849 | |
| 850 | PROGRESS (1); |
| 851 | |
| 852 | #ifdef BFD_ASSEMBLER |
| 853 | output_file_create (out_file_name); |
| 854 | assert (stdoutput != 0); |
| 855 | #endif |
| 856 | |
| 857 | #ifdef tc_init_after_args |
| 858 | tc_init_after_args (); |
| 859 | #endif |
| 860 | |
| 861 | itbl_init (); |
| 862 | |
| 863 | /* Now that we have fully initialized, and have created the output |
| 864 | file, define any symbols requested by --defsym command line |
| 865 | arguments. */ |
| 866 | while (defsyms != NULL) |
| 867 | { |
| 868 | symbolS *sym; |
| 869 | struct defsym_list *next; |
| 870 | |
| 871 | sym = symbol_new (defsyms->name, absolute_section, defsyms->value, |
| 872 | &zero_address_frag); |
| 873 | symbol_table_insert (sym); |
| 874 | next = defsyms->next; |
| 875 | free (defsyms); |
| 876 | defsyms = next; |
| 877 | } |
| 878 | |
| 879 | PROGRESS (1); |
| 880 | |
| 881 | /* Assemble it. */ |
| 882 | perform_an_assembly_pass (argc, argv); |
| 883 | |
| 884 | cond_finish_check (-1); |
| 885 | |
| 886 | #ifdef md_end |
| 887 | md_end (); |
| 888 | #endif |
| 889 | |
| 890 | /* If we've been collecting dwarf2 .debug_line info, either for |
| 891 | assembly debugging or on behalf of the compiler, emit it now. */ |
| 892 | dwarf2_finish (); |
| 893 | |
| 894 | if (seen_at_least_1_file () |
| 895 | && (flag_always_generate_output || had_errors () == 0)) |
| 896 | keep_it = 1; |
| 897 | else |
| 898 | keep_it = 0; |
| 899 | |
| 900 | #if defined (BFD_ASSEMBLER) || !defined (BFD) |
| 901 | /* This used to be done at the start of write_object_file in |
| 902 | write.c, but that caused problems when doing listings when |
| 903 | keep_it was zero. This could probably be moved above md_end, but |
| 904 | I didn't want to risk the change. */ |
| 905 | subsegs_finish (); |
| 906 | #endif |
| 907 | |
| 908 | if (keep_it) |
| 909 | write_object_file (); |
| 910 | |
| 911 | #ifndef NO_LISTING |
| 912 | listing_print (listing_filename); |
| 913 | #endif |
| 914 | |
| 915 | #ifndef OBJ_VMS /* does its own file handling */ |
| 916 | #ifndef BFD_ASSEMBLER |
| 917 | if (keep_it) |
| 918 | #endif |
| 919 | output_file_close (out_file_name); |
| 920 | #endif |
| 921 | |
| 922 | if (flag_fatal_warnings && had_warnings () > 0 && had_errors () == 0) |
| 923 | as_bad (_("%d warnings, treating warnings as errors"), had_warnings ()); |
| 924 | |
| 925 | if (had_errors () > 0 && ! flag_always_generate_output) |
| 926 | keep_it = 0; |
| 927 | |
| 928 | if (!keep_it) |
| 929 | unlink (out_file_name); |
| 930 | |
| 931 | input_scrub_end (); |
| 932 | |
| 933 | END_PROGRESS (myname); |
| 934 | |
| 935 | /* Use xexit instead of return, because under VMS environments they |
| 936 | may not place the same interpretation on the value given. */ |
| 937 | if (had_errors () > 0) |
| 938 | xexit (EXIT_FAILURE); |
| 939 | |
| 940 | /* Only generate dependency file if assembler was successful. */ |
| 941 | print_dependencies (); |
| 942 | |
| 943 | xexit (EXIT_SUCCESS); |
| 944 | } |
| 945 | |
| 946 | static void |
| 947 | dump_statistics () |
| 948 | { |
| 949 | #ifdef HAVE_SBRK |
| 950 | char *lim = (char *) sbrk (0); |
| 951 | #endif |
| 952 | long run_time = get_run_time () - start_time; |
| 953 | |
| 954 | fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"), |
| 955 | myname, run_time / 1000000, run_time % 1000000); |
| 956 | #ifdef HAVE_SBRK |
| 957 | fprintf (stderr, _("%s: data size %ld\n"), |
| 958 | myname, (long) (lim - (char *) &environ)); |
| 959 | #endif |
| 960 | |
| 961 | subsegs_print_statistics (stderr); |
| 962 | write_print_statistics (stderr); |
| 963 | symbol_print_statistics (stderr); |
| 964 | read_print_statistics (stderr); |
| 965 | |
| 966 | #ifdef tc_print_statistics |
| 967 | tc_print_statistics (stderr); |
| 968 | #endif |
| 969 | #ifdef obj_print_statistics |
| 970 | obj_print_statistics (stderr); |
| 971 | #endif |
| 972 | } |
| 973 | \f |
| 974 | /* Here to attempt 1 pass over each input file. |
| 975 | We scan argv[*] looking for filenames or exactly "" which is |
| 976 | shorthand for stdin. Any argv that is NULL is not a file-name. |
| 977 | We set need_pass_2 TRUE if, after this, we still have unresolved |
| 978 | expressions of the form (unknown value)+-(unknown value). |
| 979 | |
| 980 | Note the un*x semantics: there is only 1 logical input file, but it |
| 981 | may be a catenation of many 'physical' input files. */ |
| 982 | |
| 983 | static void |
| 984 | perform_an_assembly_pass (argc, argv) |
| 985 | int argc; |
| 986 | char **argv; |
| 987 | { |
| 988 | int saw_a_file = 0; |
| 989 | #ifdef BFD_ASSEMBLER |
| 990 | flagword applicable; |
| 991 | #endif |
| 992 | |
| 993 | need_pass_2 = 0; |
| 994 | |
| 995 | #ifndef BFD_ASSEMBLER |
| 996 | #ifdef MANY_SEGMENTS |
| 997 | { |
| 998 | unsigned int i; |
| 999 | for (i = SEG_E0; i < SEG_UNKNOWN; i++) |
| 1000 | segment_info[i].fix_root = 0; |
| 1001 | } |
| 1002 | /* Create the three fixed ones. */ |
| 1003 | { |
| 1004 | segT seg; |
| 1005 | |
| 1006 | #ifdef TE_APOLLO |
| 1007 | seg = subseg_new (".wtext", 0); |
| 1008 | #else |
| 1009 | seg = subseg_new (".text", 0); |
| 1010 | #endif |
| 1011 | assert (seg == SEG_E0); |
| 1012 | seg = subseg_new (".data", 0); |
| 1013 | assert (seg == SEG_E1); |
| 1014 | seg = subseg_new (".bss", 0); |
| 1015 | assert (seg == SEG_E2); |
| 1016 | #ifdef TE_APOLLO |
| 1017 | create_target_segments (); |
| 1018 | #endif |
| 1019 | } |
| 1020 | |
| 1021 | #else /* not MANY_SEGMENTS */ |
| 1022 | text_fix_root = NULL; |
| 1023 | data_fix_root = NULL; |
| 1024 | bss_fix_root = NULL; |
| 1025 | #endif /* not MANY_SEGMENTS */ |
| 1026 | #else /* BFD_ASSEMBLER */ |
| 1027 | /* Create the standard sections, and those the assembler uses |
| 1028 | internally. */ |
| 1029 | text_section = subseg_new (TEXT_SECTION_NAME, 0); |
| 1030 | data_section = subseg_new (DATA_SECTION_NAME, 0); |
| 1031 | bss_section = subseg_new (BSS_SECTION_NAME, 0); |
| 1032 | /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed |
| 1033 | to have relocs, otherwise we don't find out in time. */ |
| 1034 | applicable = bfd_applicable_section_flags (stdoutput); |
| 1035 | bfd_set_section_flags (stdoutput, text_section, |
| 1036 | applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC |
| 1037 | | SEC_CODE | SEC_READONLY)); |
| 1038 | bfd_set_section_flags (stdoutput, data_section, |
| 1039 | applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC |
| 1040 | | SEC_DATA)); |
| 1041 | bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC); |
| 1042 | seg_info (bss_section)->bss = 1; |
| 1043 | subseg_new (BFD_ABS_SECTION_NAME, 0); |
| 1044 | subseg_new (BFD_UND_SECTION_NAME, 0); |
| 1045 | reg_section = subseg_new ("*GAS `reg' section*", 0); |
| 1046 | expr_section = subseg_new ("*GAS `expr' section*", 0); |
| 1047 | |
| 1048 | #endif /* BFD_ASSEMBLER */ |
| 1049 | |
| 1050 | subseg_set (text_section, 0); |
| 1051 | |
| 1052 | /* This may add symbol table entries, which requires having an open BFD, |
| 1053 | and sections already created, in BFD_ASSEMBLER mode. */ |
| 1054 | md_begin (); |
| 1055 | |
| 1056 | #ifdef obj_begin |
| 1057 | obj_begin (); |
| 1058 | #endif |
| 1059 | |
| 1060 | /* Skip argv[0]. */ |
| 1061 | argv++; |
| 1062 | argc--; |
| 1063 | |
| 1064 | while (argc--) |
| 1065 | { |
| 1066 | if (*argv) |
| 1067 | { /* Is it a file-name argument? */ |
| 1068 | PROGRESS (1); |
| 1069 | saw_a_file++; |
| 1070 | /* argv->"" if stdin desired, else->filename */ |
| 1071 | read_a_source_file (*argv); |
| 1072 | } |
| 1073 | argv++; /* completed that argv */ |
| 1074 | } |
| 1075 | if (!saw_a_file) |
| 1076 | read_a_source_file (""); |
| 1077 | } |
| 1078 | |
| 1079 | /* The interface between the macro code and gas expression handling. */ |
| 1080 | |
| 1081 | static int |
| 1082 | macro_expr (emsg, idx, in, val) |
| 1083 | const char *emsg; |
| 1084 | int idx; |
| 1085 | sb *in; |
| 1086 | int *val; |
| 1087 | { |
| 1088 | char *hold; |
| 1089 | expressionS ex; |
| 1090 | |
| 1091 | sb_terminate (in); |
| 1092 | |
| 1093 | hold = input_line_pointer; |
| 1094 | input_line_pointer = in->ptr + idx; |
| 1095 | expression (&ex); |
| 1096 | idx = input_line_pointer - in->ptr; |
| 1097 | input_line_pointer = hold; |
| 1098 | |
| 1099 | if (ex.X_op != O_constant) |
| 1100 | as_bad ("%s", emsg); |
| 1101 | |
| 1102 | *val = (int) ex.X_add_number; |
| 1103 | |
| 1104 | return idx; |
| 1105 | } |