| 1 | /* coff object file format |
| 2 | Copyright (C) 1989-2015 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GAS. |
| 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, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public 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 | #define OBJ_HEADER "obj-coff.h" |
| 22 | |
| 23 | #include "as.h" |
| 24 | #include "safe-ctype.h" |
| 25 | #include "subsegs.h" |
| 26 | #include "struc-symbol.h" |
| 27 | |
| 28 | #ifdef TE_PE |
| 29 | #include "coff/pe.h" |
| 30 | #endif |
| 31 | |
| 32 | #ifdef OBJ_XCOFF |
| 33 | #include "coff/xcoff.h" |
| 34 | #endif |
| 35 | |
| 36 | #define streq(a,b) (strcmp ((a), (b)) == 0) |
| 37 | #define strneq(a,b,n) (strncmp ((a), (b), (n)) == 0) |
| 38 | |
| 39 | /* I think this is probably always correct. */ |
| 40 | #ifndef KEEP_RELOC_INFO |
| 41 | #define KEEP_RELOC_INFO |
| 42 | #endif |
| 43 | |
| 44 | /* obj_coff_section will use this macro to set a new section's |
| 45 | attributes when a directive has no valid flags or the "w" flag is |
| 46 | used. This default should be appropriate for most. */ |
| 47 | #ifndef TC_COFF_SECTION_DEFAULT_ATTRIBUTES |
| 48 | #define TC_COFF_SECTION_DEFAULT_ATTRIBUTES (SEC_LOAD | SEC_DATA) |
| 49 | #endif |
| 50 | |
| 51 | /* This is used to hold the symbol built by a sequence of pseudo-ops |
| 52 | from .def and .endef. */ |
| 53 | static symbolS *def_symbol_in_progress; |
| 54 | #ifdef TE_PE |
| 55 | /* PE weak alternate symbols begin with this string. */ |
| 56 | static const char weak_altprefix[] = ".weak."; |
| 57 | #endif /* TE_PE */ |
| 58 | |
| 59 | #include "obj-coff-seh.c" |
| 60 | |
| 61 | typedef struct |
| 62 | { |
| 63 | unsigned long chunk_size; |
| 64 | unsigned long element_size; |
| 65 | unsigned long size; |
| 66 | char *data; |
| 67 | unsigned long pointer; |
| 68 | } |
| 69 | stack; |
| 70 | |
| 71 | \f |
| 72 | /* Stack stuff. */ |
| 73 | |
| 74 | static stack * |
| 75 | stack_init (unsigned long chunk_size, |
| 76 | unsigned long element_size) |
| 77 | { |
| 78 | stack *st; |
| 79 | |
| 80 | st = malloc (sizeof (* st)); |
| 81 | if (!st) |
| 82 | return NULL; |
| 83 | st->data = malloc (chunk_size); |
| 84 | if (!st->data) |
| 85 | { |
| 86 | free (st); |
| 87 | return NULL; |
| 88 | } |
| 89 | st->pointer = 0; |
| 90 | st->size = chunk_size; |
| 91 | st->chunk_size = chunk_size; |
| 92 | st->element_size = element_size; |
| 93 | return st; |
| 94 | } |
| 95 | |
| 96 | static char * |
| 97 | stack_push (stack *st, char *element) |
| 98 | { |
| 99 | if (st->pointer + st->element_size >= st->size) |
| 100 | { |
| 101 | st->size += st->chunk_size; |
| 102 | if ((st->data = xrealloc (st->data, st->size)) == NULL) |
| 103 | return NULL; |
| 104 | } |
| 105 | memcpy (st->data + st->pointer, element, st->element_size); |
| 106 | st->pointer += st->element_size; |
| 107 | return st->data + st->pointer; |
| 108 | } |
| 109 | |
| 110 | static char * |
| 111 | stack_pop (stack *st) |
| 112 | { |
| 113 | if (st->pointer < st->element_size) |
| 114 | { |
| 115 | st->pointer = 0; |
| 116 | return NULL; |
| 117 | } |
| 118 | st->pointer -= st->element_size; |
| 119 | return st->data + st->pointer; |
| 120 | } |
| 121 | \f |
| 122 | /* Maintain a list of the tagnames of the structures. */ |
| 123 | |
| 124 | static struct hash_control *tag_hash; |
| 125 | |
| 126 | static void |
| 127 | tag_init (void) |
| 128 | { |
| 129 | tag_hash = hash_new (); |
| 130 | } |
| 131 | |
| 132 | static void |
| 133 | tag_insert (const char *name, symbolS *symbolP) |
| 134 | { |
| 135 | const char *error_string; |
| 136 | |
| 137 | if ((error_string = hash_jam (tag_hash, name, (char *) symbolP))) |
| 138 | as_fatal (_("Inserting \"%s\" into structure table failed: %s"), |
| 139 | name, error_string); |
| 140 | } |
| 141 | |
| 142 | static symbolS * |
| 143 | tag_find (char *name) |
| 144 | { |
| 145 | return (symbolS *) hash_find (tag_hash, name); |
| 146 | } |
| 147 | |
| 148 | static symbolS * |
| 149 | tag_find_or_make (char *name) |
| 150 | { |
| 151 | symbolS *symbolP; |
| 152 | |
| 153 | if ((symbolP = tag_find (name)) == NULL) |
| 154 | { |
| 155 | symbolP = symbol_new (name, undefined_section, |
| 156 | 0, &zero_address_frag); |
| 157 | |
| 158 | tag_insert (S_GET_NAME (symbolP), symbolP); |
| 159 | symbol_table_insert (symbolP); |
| 160 | } |
| 161 | |
| 162 | return symbolP; |
| 163 | } |
| 164 | |
| 165 | /* We accept the .bss directive to set the section for backward |
| 166 | compatibility with earlier versions of gas. */ |
| 167 | |
| 168 | static void |
| 169 | obj_coff_bss (int ignore ATTRIBUTE_UNUSED) |
| 170 | { |
| 171 | if (*input_line_pointer == '\n') |
| 172 | subseg_new (".bss", get_absolute_expression ()); |
| 173 | else |
| 174 | s_lcomm (0); |
| 175 | } |
| 176 | |
| 177 | #ifdef TE_PE |
| 178 | /* Called from read.c:s_comm after we've parsed .comm symbol, size. |
| 179 | Parse a possible alignment value. */ |
| 180 | |
| 181 | static symbolS * |
| 182 | obj_coff_common_parse (int ignore ATTRIBUTE_UNUSED, symbolS *symbolP, addressT size) |
| 183 | { |
| 184 | addressT align = 0; |
| 185 | |
| 186 | if (*input_line_pointer == ',') |
| 187 | { |
| 188 | align = parse_align (0); |
| 189 | if (align == (addressT) -1) |
| 190 | return NULL; |
| 191 | } |
| 192 | |
| 193 | S_SET_VALUE (symbolP, size); |
| 194 | S_SET_EXTERNAL (symbolP); |
| 195 | S_SET_SEGMENT (symbolP, bfd_com_section_ptr); |
| 196 | |
| 197 | symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT; |
| 198 | |
| 199 | /* There is no S_SET_ALIGN (symbolP, align) in COFF/PE. |
| 200 | Instead we must add a note to the .drectve section. */ |
| 201 | if (align) |
| 202 | { |
| 203 | segT current_seg = now_seg; |
| 204 | subsegT current_subseg = now_subseg; |
| 205 | flagword oldflags; |
| 206 | asection *sec; |
| 207 | size_t pfxlen, numlen; |
| 208 | char *frag; |
| 209 | char numbuff[20]; |
| 210 | |
| 211 | sec = subseg_new (".drectve", 0); |
| 212 | oldflags = bfd_get_section_flags (stdoutput, sec); |
| 213 | if (oldflags == SEC_NO_FLAGS) |
| 214 | { |
| 215 | if (!bfd_set_section_flags (stdoutput, sec, |
| 216 | TC_COFF_SECTION_DEFAULT_ATTRIBUTES)) |
| 217 | as_warn (_("error setting flags for \"%s\": %s"), |
| 218 | bfd_section_name (stdoutput, sec), |
| 219 | bfd_errmsg (bfd_get_error ())); |
| 220 | } |
| 221 | |
| 222 | /* Emit a string. Note no NUL-termination. */ |
| 223 | pfxlen = strlen (" -aligncomm:") + 2 + strlen (S_GET_NAME (symbolP)) + 1; |
| 224 | numlen = snprintf (numbuff, sizeof (numbuff), "%d", (int) align); |
| 225 | frag = frag_more (pfxlen + numlen); |
| 226 | (void) sprintf (frag, " -aligncomm:\"%s\",", S_GET_NAME (symbolP)); |
| 227 | memcpy (frag + pfxlen, numbuff, numlen); |
| 228 | /* Restore original subseg. */ |
| 229 | subseg_set (current_seg, current_subseg); |
| 230 | } |
| 231 | |
| 232 | return symbolP; |
| 233 | } |
| 234 | |
| 235 | static void |
| 236 | obj_coff_comm (int ignore ATTRIBUTE_UNUSED) |
| 237 | { |
| 238 | s_comm_internal (ignore, obj_coff_common_parse); |
| 239 | } |
| 240 | #endif /* TE_PE */ |
| 241 | |
| 242 | #define GET_FILENAME_STRING(X) \ |
| 243 | ((char *) (&((X)->sy_symbol.ost_auxent->x_file.x_n.x_offset))[1]) |
| 244 | |
| 245 | /* @@ Ick. */ |
| 246 | static segT |
| 247 | fetch_coff_debug_section (void) |
| 248 | { |
| 249 | static segT debug_section; |
| 250 | |
| 251 | if (!debug_section) |
| 252 | { |
| 253 | const asymbol *s; |
| 254 | |
| 255 | s = bfd_make_debug_symbol (stdoutput, NULL, 0); |
| 256 | gas_assert (s != 0); |
| 257 | debug_section = s->section; |
| 258 | } |
| 259 | return debug_section; |
| 260 | } |
| 261 | |
| 262 | void |
| 263 | SA_SET_SYM_ENDNDX (symbolS *sym, symbolS *val) |
| 264 | { |
| 265 | combined_entry_type *entry, *p; |
| 266 | |
| 267 | entry = &coffsymbol (symbol_get_bfdsym (sym))->native[1]; |
| 268 | p = coffsymbol (symbol_get_bfdsym (val))->native; |
| 269 | entry->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p = p; |
| 270 | entry->fix_end = 1; |
| 271 | } |
| 272 | |
| 273 | static void |
| 274 | SA_SET_SYM_TAGNDX (symbolS *sym, symbolS *val) |
| 275 | { |
| 276 | combined_entry_type *entry, *p; |
| 277 | |
| 278 | entry = &coffsymbol (symbol_get_bfdsym (sym))->native[1]; |
| 279 | p = coffsymbol (symbol_get_bfdsym (val))->native; |
| 280 | entry->u.auxent.x_sym.x_tagndx.p = p; |
| 281 | entry->fix_tag = 1; |
| 282 | } |
| 283 | |
| 284 | static int |
| 285 | S_GET_DATA_TYPE (symbolS *sym) |
| 286 | { |
| 287 | return coffsymbol (symbol_get_bfdsym (sym))->native->u.syment.n_type; |
| 288 | } |
| 289 | |
| 290 | int |
| 291 | S_SET_DATA_TYPE (symbolS *sym, int val) |
| 292 | { |
| 293 | coffsymbol (symbol_get_bfdsym (sym))->native->u.syment.n_type = val; |
| 294 | return val; |
| 295 | } |
| 296 | |
| 297 | int |
| 298 | S_GET_STORAGE_CLASS (symbolS *sym) |
| 299 | { |
| 300 | return coffsymbol (symbol_get_bfdsym (sym))->native->u.syment.n_sclass; |
| 301 | } |
| 302 | |
| 303 | int |
| 304 | S_SET_STORAGE_CLASS (symbolS *sym, int val) |
| 305 | { |
| 306 | coffsymbol (symbol_get_bfdsym (sym))->native->u.syment.n_sclass = val; |
| 307 | return val; |
| 308 | } |
| 309 | |
| 310 | /* Merge a debug symbol containing debug information into a normal symbol. */ |
| 311 | |
| 312 | static void |
| 313 | c_symbol_merge (symbolS *debug, symbolS *normal) |
| 314 | { |
| 315 | S_SET_DATA_TYPE (normal, S_GET_DATA_TYPE (debug)); |
| 316 | S_SET_STORAGE_CLASS (normal, S_GET_STORAGE_CLASS (debug)); |
| 317 | |
| 318 | if (S_GET_NUMBER_AUXILIARY (debug) > S_GET_NUMBER_AUXILIARY (normal)) |
| 319 | /* Take the most we have. */ |
| 320 | S_SET_NUMBER_AUXILIARY (normal, S_GET_NUMBER_AUXILIARY (debug)); |
| 321 | |
| 322 | if (S_GET_NUMBER_AUXILIARY (debug) > 0) |
| 323 | /* Move all the auxiliary information. */ |
| 324 | memcpy (SYM_AUXINFO (normal), SYM_AUXINFO (debug), |
| 325 | (S_GET_NUMBER_AUXILIARY (debug) |
| 326 | * sizeof (*SYM_AUXINFO (debug)))); |
| 327 | |
| 328 | /* Move the debug flags. */ |
| 329 | SF_SET_DEBUG_FIELD (normal, SF_GET_DEBUG_FIELD (debug)); |
| 330 | } |
| 331 | |
| 332 | void |
| 333 | c_dot_file_symbol (const char *filename, int appfile ATTRIBUTE_UNUSED) |
| 334 | { |
| 335 | symbolS *symbolP; |
| 336 | |
| 337 | /* BFD converts filename to a .file symbol with an aux entry. It |
| 338 | also handles chaining. */ |
| 339 | symbolP = symbol_new (filename, bfd_abs_section_ptr, 0, &zero_address_frag); |
| 340 | |
| 341 | S_SET_STORAGE_CLASS (symbolP, C_FILE); |
| 342 | S_SET_NUMBER_AUXILIARY (symbolP, 1); |
| 343 | |
| 344 | symbol_get_bfdsym (symbolP)->flags = BSF_DEBUGGING; |
| 345 | |
| 346 | #ifndef NO_LISTING |
| 347 | { |
| 348 | extern int listing; |
| 349 | |
| 350 | if (listing) |
| 351 | listing_source_file (filename); |
| 352 | } |
| 353 | #endif |
| 354 | |
| 355 | /* Make sure that the symbol is first on the symbol chain. */ |
| 356 | if (symbol_rootP != symbolP) |
| 357 | { |
| 358 | symbol_remove (symbolP, &symbol_rootP, &symbol_lastP); |
| 359 | symbol_insert (symbolP, symbol_rootP, &symbol_rootP, &symbol_lastP); |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | /* Line number handling. */ |
| 364 | |
| 365 | struct line_no |
| 366 | { |
| 367 | struct line_no *next; |
| 368 | fragS *frag; |
| 369 | alent l; |
| 370 | }; |
| 371 | |
| 372 | int coff_line_base; |
| 373 | |
| 374 | /* Symbol of last function, which we should hang line#s off of. */ |
| 375 | static symbolS *line_fsym; |
| 376 | |
| 377 | #define in_function() (line_fsym != 0) |
| 378 | #define clear_function() (line_fsym = 0) |
| 379 | #define set_function(F) (line_fsym = (F), coff_add_linesym (F)) |
| 380 | |
| 381 | \f |
| 382 | void |
| 383 | coff_obj_symbol_new_hook (symbolS *symbolP) |
| 384 | { |
| 385 | long sz = (OBJ_COFF_MAX_AUXENTRIES + 1) * sizeof (combined_entry_type); |
| 386 | char * s = xmalloc (sz); |
| 387 | |
| 388 | memset (s, 0, sz); |
| 389 | coffsymbol (symbol_get_bfdsym (symbolP))->native = (combined_entry_type *) s; |
| 390 | coffsymbol (symbol_get_bfdsym (symbolP))->native->is_sym = TRUE; |
| 391 | |
| 392 | S_SET_DATA_TYPE (symbolP, T_NULL); |
| 393 | S_SET_STORAGE_CLASS (symbolP, 0); |
| 394 | S_SET_NUMBER_AUXILIARY (symbolP, 0); |
| 395 | |
| 396 | if (S_IS_STRING (symbolP)) |
| 397 | SF_SET_STRING (symbolP); |
| 398 | |
| 399 | if (S_IS_LOCAL (symbolP)) |
| 400 | SF_SET_LOCAL (symbolP); |
| 401 | } |
| 402 | |
| 403 | void |
| 404 | coff_obj_symbol_clone_hook (symbolS *newsymP, symbolS *orgsymP) |
| 405 | { |
| 406 | long sz = (OBJ_COFF_MAX_AUXENTRIES + 1) * sizeof (combined_entry_type); |
| 407 | combined_entry_type * s = xmalloc (sz); |
| 408 | |
| 409 | memcpy (s, coffsymbol (symbol_get_bfdsym (orgsymP))->native, sz); |
| 410 | coffsymbol (symbol_get_bfdsym (newsymP))->native = s; |
| 411 | |
| 412 | SF_SET (newsymP, SF_GET (orgsymP)); |
| 413 | } |
| 414 | |
| 415 | \f |
| 416 | /* Handle .ln directives. */ |
| 417 | |
| 418 | static symbolS *current_lineno_sym; |
| 419 | static struct line_no *line_nos; |
| 420 | /* FIXME: Blindly assume all .ln directives will be in the .text section. */ |
| 421 | int coff_n_line_nos; |
| 422 | |
| 423 | static void |
| 424 | add_lineno (fragS * frag, addressT offset, int num) |
| 425 | { |
| 426 | struct line_no * new_line = xmalloc (sizeof (* new_line)); |
| 427 | |
| 428 | if (!current_lineno_sym) |
| 429 | abort (); |
| 430 | |
| 431 | #ifndef OBJ_XCOFF |
| 432 | /* The native aix assembler accepts negative line number. */ |
| 433 | |
| 434 | if (num <= 0) |
| 435 | { |
| 436 | /* Zero is used as an end marker in the file. */ |
| 437 | as_warn (_("Line numbers must be positive integers\n")); |
| 438 | num = 1; |
| 439 | } |
| 440 | #endif /* OBJ_XCOFF */ |
| 441 | new_line->next = line_nos; |
| 442 | new_line->frag = frag; |
| 443 | new_line->l.line_number = num; |
| 444 | new_line->l.u.offset = offset; |
| 445 | line_nos = new_line; |
| 446 | coff_n_line_nos++; |
| 447 | } |
| 448 | |
| 449 | void |
| 450 | coff_add_linesym (symbolS *sym) |
| 451 | { |
| 452 | if (line_nos) |
| 453 | { |
| 454 | coffsymbol (symbol_get_bfdsym (current_lineno_sym))->lineno = |
| 455 | (alent *) line_nos; |
| 456 | coff_n_line_nos++; |
| 457 | line_nos = 0; |
| 458 | } |
| 459 | current_lineno_sym = sym; |
| 460 | } |
| 461 | |
| 462 | static void |
| 463 | obj_coff_ln (int appline) |
| 464 | { |
| 465 | int l; |
| 466 | |
| 467 | if (! appline && def_symbol_in_progress != NULL) |
| 468 | { |
| 469 | as_warn (_(".ln pseudo-op inside .def/.endef: ignored.")); |
| 470 | demand_empty_rest_of_line (); |
| 471 | return; |
| 472 | } |
| 473 | |
| 474 | l = get_absolute_expression (); |
| 475 | |
| 476 | /* If there is no lineno symbol, treat a .ln |
| 477 | directive as if it were a .appline directive. */ |
| 478 | if (appline || current_lineno_sym == NULL) |
| 479 | new_logical_line ((char *) NULL, l - 1); |
| 480 | else |
| 481 | add_lineno (frag_now, frag_now_fix (), l); |
| 482 | |
| 483 | #ifndef NO_LISTING |
| 484 | { |
| 485 | extern int listing; |
| 486 | |
| 487 | if (listing) |
| 488 | { |
| 489 | if (! appline) |
| 490 | l += coff_line_base - 1; |
| 491 | listing_source_line (l); |
| 492 | } |
| 493 | } |
| 494 | #endif |
| 495 | |
| 496 | demand_empty_rest_of_line (); |
| 497 | } |
| 498 | |
| 499 | /* .loc is essentially the same as .ln; parse it for assembler |
| 500 | compatibility. */ |
| 501 | |
| 502 | static void |
| 503 | obj_coff_loc (int ignore ATTRIBUTE_UNUSED) |
| 504 | { |
| 505 | int lineno; |
| 506 | |
| 507 | /* FIXME: Why do we need this check? We need it for ECOFF, but why |
| 508 | do we need it for COFF? */ |
| 509 | if (now_seg != text_section) |
| 510 | { |
| 511 | as_warn (_(".loc outside of .text")); |
| 512 | demand_empty_rest_of_line (); |
| 513 | return; |
| 514 | } |
| 515 | |
| 516 | if (def_symbol_in_progress != NULL) |
| 517 | { |
| 518 | as_warn (_(".loc pseudo-op inside .def/.endef: ignored.")); |
| 519 | demand_empty_rest_of_line (); |
| 520 | return; |
| 521 | } |
| 522 | |
| 523 | /* Skip the file number. */ |
| 524 | SKIP_WHITESPACE (); |
| 525 | get_absolute_expression (); |
| 526 | SKIP_WHITESPACE (); |
| 527 | |
| 528 | lineno = get_absolute_expression (); |
| 529 | |
| 530 | #ifndef NO_LISTING |
| 531 | { |
| 532 | extern int listing; |
| 533 | |
| 534 | if (listing) |
| 535 | { |
| 536 | lineno += coff_line_base - 1; |
| 537 | listing_source_line (lineno); |
| 538 | } |
| 539 | } |
| 540 | #endif |
| 541 | |
| 542 | demand_empty_rest_of_line (); |
| 543 | |
| 544 | add_lineno (frag_now, frag_now_fix (), lineno); |
| 545 | } |
| 546 | |
| 547 | /* Handle the .ident pseudo-op. */ |
| 548 | |
| 549 | static void |
| 550 | obj_coff_ident (int ignore ATTRIBUTE_UNUSED) |
| 551 | { |
| 552 | segT current_seg = now_seg; |
| 553 | subsegT current_subseg = now_subseg; |
| 554 | |
| 555 | #ifdef TE_PE |
| 556 | { |
| 557 | segT sec; |
| 558 | |
| 559 | /* We could put it in .comment, but that creates an extra section |
| 560 | that shouldn't be loaded into memory, which requires linker |
| 561 | changes... For now, until proven otherwise, use .rdata. */ |
| 562 | sec = subseg_new (".rdata$zzz", 0); |
| 563 | bfd_set_section_flags (stdoutput, sec, |
| 564 | ((SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA) |
| 565 | & bfd_applicable_section_flags (stdoutput))); |
| 566 | } |
| 567 | #else |
| 568 | subseg_new (".comment", 0); |
| 569 | #endif |
| 570 | |
| 571 | stringer (8 + 1); |
| 572 | subseg_set (current_seg, current_subseg); |
| 573 | } |
| 574 | |
| 575 | /* Handle .def directives. |
| 576 | |
| 577 | One might ask : why can't we symbol_new if the symbol does not |
| 578 | already exist and fill it with debug information. Because of |
| 579 | the C_EFCN special symbol. It would clobber the value of the |
| 580 | function symbol before we have a chance to notice that it is |
| 581 | a C_EFCN. And a second reason is that the code is more clear this |
| 582 | way. (at least I think it is :-). */ |
| 583 | |
| 584 | #define SKIP_SEMI_COLON() while (*input_line_pointer++ != ';') |
| 585 | #define SKIP_WHITESPACES() while (*input_line_pointer == ' ' || \ |
| 586 | *input_line_pointer == '\t') \ |
| 587 | input_line_pointer++; |
| 588 | |
| 589 | static void |
| 590 | obj_coff_def (int what ATTRIBUTE_UNUSED) |
| 591 | { |
| 592 | char name_end; /* Char after the end of name. */ |
| 593 | char *symbol_name; /* Name of the debug symbol. */ |
| 594 | char *symbol_name_copy; /* Temporary copy of the name. */ |
| 595 | unsigned int symbol_name_length; |
| 596 | |
| 597 | if (def_symbol_in_progress != NULL) |
| 598 | { |
| 599 | as_warn (_(".def pseudo-op used inside of .def/.endef: ignored.")); |
| 600 | demand_empty_rest_of_line (); |
| 601 | return; |
| 602 | } |
| 603 | |
| 604 | SKIP_WHITESPACES (); |
| 605 | |
| 606 | symbol_name = input_line_pointer; |
| 607 | name_end = get_symbol_end (); |
| 608 | symbol_name_length = strlen (symbol_name); |
| 609 | symbol_name_copy = xmalloc (symbol_name_length + 1); |
| 610 | strcpy (symbol_name_copy, symbol_name); |
| 611 | #ifdef tc_canonicalize_symbol_name |
| 612 | symbol_name_copy = tc_canonicalize_symbol_name (symbol_name_copy); |
| 613 | #endif |
| 614 | |
| 615 | /* Initialize the new symbol. */ |
| 616 | def_symbol_in_progress = symbol_make (symbol_name_copy); |
| 617 | symbol_set_frag (def_symbol_in_progress, &zero_address_frag); |
| 618 | S_SET_VALUE (def_symbol_in_progress, 0); |
| 619 | |
| 620 | if (S_IS_STRING (def_symbol_in_progress)) |
| 621 | SF_SET_STRING (def_symbol_in_progress); |
| 622 | |
| 623 | *input_line_pointer = name_end; |
| 624 | |
| 625 | demand_empty_rest_of_line (); |
| 626 | } |
| 627 | |
| 628 | static void |
| 629 | obj_coff_endef (int ignore ATTRIBUTE_UNUSED) |
| 630 | { |
| 631 | symbolS *symbolP = NULL; |
| 632 | |
| 633 | if (def_symbol_in_progress == NULL) |
| 634 | { |
| 635 | as_warn (_(".endef pseudo-op used outside of .def/.endef: ignored.")); |
| 636 | demand_empty_rest_of_line (); |
| 637 | return; |
| 638 | } |
| 639 | |
| 640 | /* Set the section number according to storage class. */ |
| 641 | switch (S_GET_STORAGE_CLASS (def_symbol_in_progress)) |
| 642 | { |
| 643 | case C_STRTAG: |
| 644 | case C_ENTAG: |
| 645 | case C_UNTAG: |
| 646 | SF_SET_TAG (def_symbol_in_progress); |
| 647 | /* Fall through. */ |
| 648 | case C_FILE: |
| 649 | case C_TPDEF: |
| 650 | SF_SET_DEBUG (def_symbol_in_progress); |
| 651 | S_SET_SEGMENT (def_symbol_in_progress, fetch_coff_debug_section ()); |
| 652 | break; |
| 653 | |
| 654 | case C_EFCN: |
| 655 | SF_SET_LOCAL (def_symbol_in_progress); /* Do not emit this symbol. */ |
| 656 | /* Fall through. */ |
| 657 | case C_BLOCK: |
| 658 | SF_SET_PROCESS (def_symbol_in_progress); /* Will need processing before writing. */ |
| 659 | /* Fall through. */ |
| 660 | case C_FCN: |
| 661 | { |
| 662 | const char *name; |
| 663 | |
| 664 | S_SET_SEGMENT (def_symbol_in_progress, text_section); |
| 665 | |
| 666 | name = S_GET_NAME (def_symbol_in_progress); |
| 667 | if (name[0] == '.' && name[2] == 'f' && name[3] == '\0') |
| 668 | { |
| 669 | switch (name[1]) |
| 670 | { |
| 671 | case 'b': |
| 672 | /* .bf */ |
| 673 | if (! in_function ()) |
| 674 | as_warn (_("`%s' symbol without preceding function"), name); |
| 675 | /* Will need relocating. */ |
| 676 | SF_SET_PROCESS (def_symbol_in_progress); |
| 677 | clear_function (); |
| 678 | break; |
| 679 | #ifdef TE_PE |
| 680 | case 'e': |
| 681 | /* .ef */ |
| 682 | /* The MS compilers output the actual endline, not the |
| 683 | function-relative one... we want to match without |
| 684 | changing the assembler input. */ |
| 685 | SA_SET_SYM_LNNO (def_symbol_in_progress, |
| 686 | (SA_GET_SYM_LNNO (def_symbol_in_progress) |
| 687 | + coff_line_base)); |
| 688 | break; |
| 689 | #endif |
| 690 | } |
| 691 | } |
| 692 | } |
| 693 | break; |
| 694 | |
| 695 | #ifdef C_AUTOARG |
| 696 | case C_AUTOARG: |
| 697 | #endif /* C_AUTOARG */ |
| 698 | case C_AUTO: |
| 699 | case C_REG: |
| 700 | case C_ARG: |
| 701 | case C_REGPARM: |
| 702 | case C_FIELD: |
| 703 | |
| 704 | /* According to the COFF documentation: |
| 705 | |
| 706 | http://osr5doc.sco.com:1996/topics/COFF_SectNumFld.html |
| 707 | |
| 708 | A special section number (-2) marks symbolic debugging symbols, |
| 709 | including structure/union/enumeration tag names, typedefs, and |
| 710 | the name of the file. A section number of -1 indicates that the |
| 711 | symbol has a value but is not relocatable. Examples of |
| 712 | absolute-valued symbols include automatic and register variables, |
| 713 | function arguments, and .eos symbols. |
| 714 | |
| 715 | But from Ian Lance Taylor: |
| 716 | |
| 717 | http://sources.redhat.com/ml/binutils/2000-08/msg00202.html |
| 718 | |
| 719 | the actual tools all marked them as section -1. So the GNU COFF |
| 720 | assembler follows historical COFF assemblers. |
| 721 | |
| 722 | However, it causes problems for djgpp |
| 723 | |
| 724 | http://sources.redhat.com/ml/binutils/2000-08/msg00210.html |
| 725 | |
| 726 | By defining STRICTCOFF, a COFF port can make the assembler to |
| 727 | follow the documented behavior. */ |
| 728 | #ifdef STRICTCOFF |
| 729 | case C_MOS: |
| 730 | case C_MOE: |
| 731 | case C_MOU: |
| 732 | case C_EOS: |
| 733 | #endif |
| 734 | SF_SET_DEBUG (def_symbol_in_progress); |
| 735 | S_SET_SEGMENT (def_symbol_in_progress, absolute_section); |
| 736 | break; |
| 737 | |
| 738 | #ifndef STRICTCOFF |
| 739 | case C_MOS: |
| 740 | case C_MOE: |
| 741 | case C_MOU: |
| 742 | case C_EOS: |
| 743 | S_SET_SEGMENT (def_symbol_in_progress, absolute_section); |
| 744 | break; |
| 745 | #endif |
| 746 | |
| 747 | case C_EXT: |
| 748 | case C_WEAKEXT: |
| 749 | #ifdef TE_PE |
| 750 | case C_NT_WEAK: |
| 751 | #endif |
| 752 | case C_STAT: |
| 753 | case C_LABEL: |
| 754 | /* Valid but set somewhere else (s_comm, s_lcomm, colon). */ |
| 755 | break; |
| 756 | |
| 757 | default: |
| 758 | case C_USTATIC: |
| 759 | case C_EXTDEF: |
| 760 | case C_ULABEL: |
| 761 | as_warn (_("unexpected storage class %d"), |
| 762 | S_GET_STORAGE_CLASS (def_symbol_in_progress)); |
| 763 | break; |
| 764 | } |
| 765 | |
| 766 | /* Now that we have built a debug symbol, try to find if we should |
| 767 | merge with an existing symbol or not. If a symbol is C_EFCN or |
| 768 | absolute_section or untagged SEG_DEBUG it never merges. We also |
| 769 | don't merge labels, which are in a different namespace, nor |
| 770 | symbols which have not yet been defined since they are typically |
| 771 | unique, nor do we merge tags with non-tags. */ |
| 772 | |
| 773 | /* Two cases for functions. Either debug followed by definition or |
| 774 | definition followed by debug. For definition first, we will |
| 775 | merge the debug symbol into the definition. For debug first, the |
| 776 | lineno entry MUST point to the definition function or else it |
| 777 | will point off into space when obj_crawl_symbol_chain() merges |
| 778 | the debug symbol into the real symbol. Therefor, let's presume |
| 779 | the debug symbol is a real function reference. */ |
| 780 | |
| 781 | /* FIXME-SOON If for some reason the definition label/symbol is |
| 782 | never seen, this will probably leave an undefined symbol at link |
| 783 | time. */ |
| 784 | |
| 785 | if (S_GET_STORAGE_CLASS (def_symbol_in_progress) == C_EFCN |
| 786 | || S_GET_STORAGE_CLASS (def_symbol_in_progress) == C_LABEL |
| 787 | || (streq (bfd_get_section_name (stdoutput, |
| 788 | S_GET_SEGMENT (def_symbol_in_progress)), |
| 789 | "*DEBUG*") |
| 790 | && !SF_GET_TAG (def_symbol_in_progress)) |
| 791 | || S_GET_SEGMENT (def_symbol_in_progress) == absolute_section |
| 792 | || ! symbol_constant_p (def_symbol_in_progress) |
| 793 | || (symbolP = symbol_find (S_GET_NAME (def_symbol_in_progress))) == NULL |
| 794 | || SF_GET_TAG (def_symbol_in_progress) != SF_GET_TAG (symbolP)) |
| 795 | { |
| 796 | /* If it already is at the end of the symbol list, do nothing */ |
| 797 | if (def_symbol_in_progress != symbol_lastP) |
| 798 | { |
| 799 | symbol_remove (def_symbol_in_progress, &symbol_rootP, &symbol_lastP); |
| 800 | symbol_append (def_symbol_in_progress, symbol_lastP, &symbol_rootP, |
| 801 | &symbol_lastP); |
| 802 | } |
| 803 | } |
| 804 | else |
| 805 | { |
| 806 | /* This symbol already exists, merge the newly created symbol |
| 807 | into the old one. This is not mandatory. The linker can |
| 808 | handle duplicate symbols correctly. But I guess that it save |
| 809 | a *lot* of space if the assembly file defines a lot of |
| 810 | symbols. [loic] */ |
| 811 | |
| 812 | /* The debug entry (def_symbol_in_progress) is merged into the |
| 813 | previous definition. */ |
| 814 | |
| 815 | c_symbol_merge (def_symbol_in_progress, symbolP); |
| 816 | symbol_remove (def_symbol_in_progress, &symbol_rootP, &symbol_lastP); |
| 817 | |
| 818 | def_symbol_in_progress = symbolP; |
| 819 | |
| 820 | if (SF_GET_FUNCTION (def_symbol_in_progress) |
| 821 | || SF_GET_TAG (def_symbol_in_progress) |
| 822 | || S_GET_STORAGE_CLASS (def_symbol_in_progress) == C_STAT) |
| 823 | { |
| 824 | /* For functions, and tags, and static symbols, the symbol |
| 825 | *must* be where the debug symbol appears. Move the |
| 826 | existing symbol to the current place. */ |
| 827 | /* If it already is at the end of the symbol list, do nothing. */ |
| 828 | if (def_symbol_in_progress != symbol_lastP) |
| 829 | { |
| 830 | symbol_remove (def_symbol_in_progress, &symbol_rootP, &symbol_lastP); |
| 831 | symbol_append (def_symbol_in_progress, symbol_lastP, &symbol_rootP, &symbol_lastP); |
| 832 | } |
| 833 | } |
| 834 | } |
| 835 | |
| 836 | if (SF_GET_TAG (def_symbol_in_progress)) |
| 837 | { |
| 838 | symbolS *oldtag; |
| 839 | |
| 840 | oldtag = symbol_find (S_GET_NAME (def_symbol_in_progress)); |
| 841 | if (oldtag == NULL || ! SF_GET_TAG (oldtag)) |
| 842 | tag_insert (S_GET_NAME (def_symbol_in_progress), |
| 843 | def_symbol_in_progress); |
| 844 | } |
| 845 | |
| 846 | if (SF_GET_FUNCTION (def_symbol_in_progress)) |
| 847 | { |
| 848 | set_function (def_symbol_in_progress); |
| 849 | SF_SET_PROCESS (def_symbol_in_progress); |
| 850 | |
| 851 | if (symbolP == NULL) |
| 852 | /* That is, if this is the first time we've seen the |
| 853 | function. */ |
| 854 | symbol_table_insert (def_symbol_in_progress); |
| 855 | |
| 856 | } |
| 857 | |
| 858 | def_symbol_in_progress = NULL; |
| 859 | demand_empty_rest_of_line (); |
| 860 | } |
| 861 | |
| 862 | static void |
| 863 | obj_coff_dim (int ignore ATTRIBUTE_UNUSED) |
| 864 | { |
| 865 | int d_index; |
| 866 | |
| 867 | if (def_symbol_in_progress == NULL) |
| 868 | { |
| 869 | as_warn (_(".dim pseudo-op used outside of .def/.endef: ignored.")); |
| 870 | demand_empty_rest_of_line (); |
| 871 | return; |
| 872 | } |
| 873 | |
| 874 | S_SET_NUMBER_AUXILIARY (def_symbol_in_progress, 1); |
| 875 | |
| 876 | for (d_index = 0; d_index < DIMNUM; d_index++) |
| 877 | { |
| 878 | SKIP_WHITESPACES (); |
| 879 | SA_SET_SYM_DIMEN (def_symbol_in_progress, d_index, |
| 880 | get_absolute_expression ()); |
| 881 | |
| 882 | switch (*input_line_pointer) |
| 883 | { |
| 884 | case ',': |
| 885 | input_line_pointer++; |
| 886 | break; |
| 887 | |
| 888 | default: |
| 889 | as_warn (_("badly formed .dim directive ignored")); |
| 890 | /* Fall through. */ |
| 891 | case '\n': |
| 892 | case ';': |
| 893 | d_index = DIMNUM; |
| 894 | break; |
| 895 | } |
| 896 | } |
| 897 | |
| 898 | demand_empty_rest_of_line (); |
| 899 | } |
| 900 | |
| 901 | static void |
| 902 | obj_coff_line (int ignore ATTRIBUTE_UNUSED) |
| 903 | { |
| 904 | int this_base; |
| 905 | |
| 906 | if (def_symbol_in_progress == NULL) |
| 907 | { |
| 908 | /* Probably stabs-style line? */ |
| 909 | obj_coff_ln (0); |
| 910 | return; |
| 911 | } |
| 912 | |
| 913 | this_base = get_absolute_expression (); |
| 914 | if (streq (".bf", S_GET_NAME (def_symbol_in_progress))) |
| 915 | coff_line_base = this_base; |
| 916 | |
| 917 | S_SET_NUMBER_AUXILIARY (def_symbol_in_progress, 1); |
| 918 | SA_SET_SYM_LNNO (def_symbol_in_progress, this_base); |
| 919 | |
| 920 | demand_empty_rest_of_line (); |
| 921 | |
| 922 | #ifndef NO_LISTING |
| 923 | if (streq (".bf", S_GET_NAME (def_symbol_in_progress))) |
| 924 | { |
| 925 | extern int listing; |
| 926 | |
| 927 | if (listing) |
| 928 | listing_source_line ((unsigned int) this_base); |
| 929 | } |
| 930 | #endif |
| 931 | } |
| 932 | |
| 933 | static void |
| 934 | obj_coff_size (int ignore ATTRIBUTE_UNUSED) |
| 935 | { |
| 936 | if (def_symbol_in_progress == NULL) |
| 937 | { |
| 938 | as_warn (_(".size pseudo-op used outside of .def/.endef ignored.")); |
| 939 | demand_empty_rest_of_line (); |
| 940 | return; |
| 941 | } |
| 942 | |
| 943 | S_SET_NUMBER_AUXILIARY (def_symbol_in_progress, 1); |
| 944 | SA_SET_SYM_SIZE (def_symbol_in_progress, get_absolute_expression ()); |
| 945 | demand_empty_rest_of_line (); |
| 946 | } |
| 947 | |
| 948 | static void |
| 949 | obj_coff_scl (int ignore ATTRIBUTE_UNUSED) |
| 950 | { |
| 951 | if (def_symbol_in_progress == NULL) |
| 952 | { |
| 953 | as_warn (_(".scl pseudo-op used outside of .def/.endef ignored.")); |
| 954 | demand_empty_rest_of_line (); |
| 955 | return; |
| 956 | } |
| 957 | |
| 958 | S_SET_STORAGE_CLASS (def_symbol_in_progress, get_absolute_expression ()); |
| 959 | demand_empty_rest_of_line (); |
| 960 | } |
| 961 | |
| 962 | static void |
| 963 | obj_coff_tag (int ignore ATTRIBUTE_UNUSED) |
| 964 | { |
| 965 | char *symbol_name; |
| 966 | char name_end; |
| 967 | |
| 968 | if (def_symbol_in_progress == NULL) |
| 969 | { |
| 970 | as_warn (_(".tag pseudo-op used outside of .def/.endef ignored.")); |
| 971 | demand_empty_rest_of_line (); |
| 972 | return; |
| 973 | } |
| 974 | |
| 975 | S_SET_NUMBER_AUXILIARY (def_symbol_in_progress, 1); |
| 976 | symbol_name = input_line_pointer; |
| 977 | name_end = get_symbol_end (); |
| 978 | |
| 979 | #ifdef tc_canonicalize_symbol_name |
| 980 | symbol_name = tc_canonicalize_symbol_name (symbol_name); |
| 981 | #endif |
| 982 | |
| 983 | /* Assume that the symbol referred to by .tag is always defined. |
| 984 | This was a bad assumption. I've added find_or_make. xoxorich. */ |
| 985 | SA_SET_SYM_TAGNDX (def_symbol_in_progress, |
| 986 | tag_find_or_make (symbol_name)); |
| 987 | if (SA_GET_SYM_TAGNDX (def_symbol_in_progress) == 0L) |
| 988 | as_warn (_("tag not found for .tag %s"), symbol_name); |
| 989 | |
| 990 | SF_SET_TAGGED (def_symbol_in_progress); |
| 991 | *input_line_pointer = name_end; |
| 992 | |
| 993 | demand_empty_rest_of_line (); |
| 994 | } |
| 995 | |
| 996 | static void |
| 997 | obj_coff_type (int ignore ATTRIBUTE_UNUSED) |
| 998 | { |
| 999 | if (def_symbol_in_progress == NULL) |
| 1000 | { |
| 1001 | as_warn (_(".type pseudo-op used outside of .def/.endef ignored.")); |
| 1002 | demand_empty_rest_of_line (); |
| 1003 | return; |
| 1004 | } |
| 1005 | |
| 1006 | S_SET_DATA_TYPE (def_symbol_in_progress, get_absolute_expression ()); |
| 1007 | |
| 1008 | if (ISFCN (S_GET_DATA_TYPE (def_symbol_in_progress)) && |
| 1009 | S_GET_STORAGE_CLASS (def_symbol_in_progress) != C_TPDEF) |
| 1010 | SF_SET_FUNCTION (def_symbol_in_progress); |
| 1011 | |
| 1012 | demand_empty_rest_of_line (); |
| 1013 | } |
| 1014 | |
| 1015 | static void |
| 1016 | obj_coff_val (int ignore ATTRIBUTE_UNUSED) |
| 1017 | { |
| 1018 | if (def_symbol_in_progress == NULL) |
| 1019 | { |
| 1020 | as_warn (_(".val pseudo-op used outside of .def/.endef ignored.")); |
| 1021 | demand_empty_rest_of_line (); |
| 1022 | return; |
| 1023 | } |
| 1024 | |
| 1025 | if (is_name_beginner (*input_line_pointer)) |
| 1026 | { |
| 1027 | char *symbol_name = input_line_pointer; |
| 1028 | char name_end = get_symbol_end (); |
| 1029 | |
| 1030 | #ifdef tc_canonicalize_symbol_name |
| 1031 | symbol_name = tc_canonicalize_symbol_name (symbol_name); |
| 1032 | #endif |
| 1033 | if (streq (symbol_name, ".")) |
| 1034 | { |
| 1035 | /* If the .val is != from the .def (e.g. statics). */ |
| 1036 | symbol_set_frag (def_symbol_in_progress, frag_now); |
| 1037 | S_SET_VALUE (def_symbol_in_progress, (valueT) frag_now_fix ()); |
| 1038 | } |
| 1039 | else if (! streq (S_GET_NAME (def_symbol_in_progress), symbol_name)) |
| 1040 | { |
| 1041 | expressionS exp; |
| 1042 | |
| 1043 | exp.X_op = O_symbol; |
| 1044 | exp.X_add_symbol = symbol_find_or_make (symbol_name); |
| 1045 | exp.X_op_symbol = NULL; |
| 1046 | exp.X_add_number = 0; |
| 1047 | symbol_set_value_expression (def_symbol_in_progress, &exp); |
| 1048 | |
| 1049 | /* If the segment is undefined when the forward reference is |
| 1050 | resolved, then copy the segment id from the forward |
| 1051 | symbol. */ |
| 1052 | SF_SET_GET_SEGMENT (def_symbol_in_progress); |
| 1053 | |
| 1054 | /* FIXME: gcc can generate address expressions here in |
| 1055 | unusual cases (search for "obscure" in sdbout.c). We |
| 1056 | just ignore the offset here, thus generating incorrect |
| 1057 | debugging information. We ignore the rest of the line |
| 1058 | just below. */ |
| 1059 | } |
| 1060 | /* Otherwise, it is the name of a non debug symbol and its value |
| 1061 | will be calculated later. */ |
| 1062 | *input_line_pointer = name_end; |
| 1063 | } |
| 1064 | else |
| 1065 | { |
| 1066 | S_SET_VALUE (def_symbol_in_progress, get_absolute_expression ()); |
| 1067 | } |
| 1068 | |
| 1069 | demand_empty_rest_of_line (); |
| 1070 | } |
| 1071 | |
| 1072 | #ifdef TE_PE |
| 1073 | |
| 1074 | /* Return nonzero if name begins with weak alternate symbol prefix. */ |
| 1075 | |
| 1076 | static int |
| 1077 | weak_is_altname (const char * name) |
| 1078 | { |
| 1079 | return strneq (name, weak_altprefix, sizeof (weak_altprefix) - 1); |
| 1080 | } |
| 1081 | |
| 1082 | /* Return the name of the alternate symbol |
| 1083 | name corresponding to a weak symbol's name. */ |
| 1084 | |
| 1085 | static const char * |
| 1086 | weak_name2altname (const char * name) |
| 1087 | { |
| 1088 | char *alt_name; |
| 1089 | |
| 1090 | alt_name = xmalloc (sizeof (weak_altprefix) + strlen (name)); |
| 1091 | strcpy (alt_name, weak_altprefix); |
| 1092 | return strcat (alt_name, name); |
| 1093 | } |
| 1094 | |
| 1095 | /* Return the name of the weak symbol corresponding to an |
| 1096 | alternate symbol. */ |
| 1097 | |
| 1098 | static const char * |
| 1099 | weak_altname2name (const char * name) |
| 1100 | { |
| 1101 | gas_assert (weak_is_altname (name)); |
| 1102 | return xstrdup (name + 6); |
| 1103 | } |
| 1104 | |
| 1105 | /* Make a weak symbol name unique by |
| 1106 | appending the name of an external symbol. */ |
| 1107 | |
| 1108 | static const char * |
| 1109 | weak_uniquify (const char * name) |
| 1110 | { |
| 1111 | char *ret; |
| 1112 | const char * unique = ""; |
| 1113 | |
| 1114 | #ifdef TE_PE |
| 1115 | if (an_external_name != NULL) |
| 1116 | unique = an_external_name; |
| 1117 | #endif |
| 1118 | gas_assert (weak_is_altname (name)); |
| 1119 | |
| 1120 | ret = xmalloc (strlen (name) + strlen (unique) + 2); |
| 1121 | strcpy (ret, name); |
| 1122 | strcat (ret, "."); |
| 1123 | strcat (ret, unique); |
| 1124 | return ret; |
| 1125 | } |
| 1126 | |
| 1127 | void |
| 1128 | pecoff_obj_set_weak_hook (symbolS *symbolP) |
| 1129 | { |
| 1130 | symbolS *alternateP; |
| 1131 | |
| 1132 | /* See _Microsoft Portable Executable and Common Object |
| 1133 | File Format Specification_, section 5.5.3. |
| 1134 | Create a symbol representing the alternate value. |
| 1135 | coff_frob_symbol will set the value of this symbol from |
| 1136 | the value of the weak symbol itself. */ |
| 1137 | S_SET_STORAGE_CLASS (symbolP, C_NT_WEAK); |
| 1138 | S_SET_NUMBER_AUXILIARY (symbolP, 1); |
| 1139 | SA_SET_SYM_FSIZE (symbolP, IMAGE_WEAK_EXTERN_SEARCH_NOLIBRARY); |
| 1140 | |
| 1141 | alternateP = symbol_find_or_make (weak_name2altname (S_GET_NAME (symbolP))); |
| 1142 | S_SET_EXTERNAL (alternateP); |
| 1143 | S_SET_STORAGE_CLASS (alternateP, C_NT_WEAK); |
| 1144 | |
| 1145 | SA_SET_SYM_TAGNDX (symbolP, alternateP); |
| 1146 | } |
| 1147 | |
| 1148 | void |
| 1149 | pecoff_obj_clear_weak_hook (symbolS *symbolP) |
| 1150 | { |
| 1151 | symbolS *alternateP; |
| 1152 | |
| 1153 | S_SET_STORAGE_CLASS (symbolP, 0); |
| 1154 | SA_SET_SYM_FSIZE (symbolP, 0); |
| 1155 | |
| 1156 | alternateP = symbol_find (weak_name2altname (S_GET_NAME (symbolP))); |
| 1157 | S_CLEAR_EXTERNAL (alternateP); |
| 1158 | } |
| 1159 | |
| 1160 | #endif /* TE_PE */ |
| 1161 | |
| 1162 | /* Handle .weak. This is a GNU extension in formats other than PE. */ |
| 1163 | |
| 1164 | static void |
| 1165 | obj_coff_weak (int ignore ATTRIBUTE_UNUSED) |
| 1166 | { |
| 1167 | char *name; |
| 1168 | int c; |
| 1169 | symbolS *symbolP; |
| 1170 | |
| 1171 | do |
| 1172 | { |
| 1173 | name = input_line_pointer; |
| 1174 | c = get_symbol_end (); |
| 1175 | if (*name == 0) |
| 1176 | { |
| 1177 | as_warn (_("badly formed .weak directive ignored")); |
| 1178 | ignore_rest_of_line (); |
| 1179 | return; |
| 1180 | } |
| 1181 | c = 0; |
| 1182 | symbolP = symbol_find_or_make (name); |
| 1183 | *input_line_pointer = c; |
| 1184 | SKIP_WHITESPACE (); |
| 1185 | S_SET_WEAK (symbolP); |
| 1186 | |
| 1187 | if (c == ',') |
| 1188 | { |
| 1189 | input_line_pointer++; |
| 1190 | SKIP_WHITESPACE (); |
| 1191 | if (*input_line_pointer == '\n') |
| 1192 | c = '\n'; |
| 1193 | } |
| 1194 | |
| 1195 | } |
| 1196 | while (c == ','); |
| 1197 | |
| 1198 | demand_empty_rest_of_line (); |
| 1199 | } |
| 1200 | |
| 1201 | void |
| 1202 | coff_obj_read_begin_hook (void) |
| 1203 | { |
| 1204 | /* These had better be the same. Usually 18 bytes. */ |
| 1205 | know (sizeof (SYMENT) == sizeof (AUXENT)); |
| 1206 | know (SYMESZ == AUXESZ); |
| 1207 | tag_init (); |
| 1208 | } |
| 1209 | |
| 1210 | symbolS *coff_last_function; |
| 1211 | #ifndef OBJ_XCOFF |
| 1212 | static symbolS *coff_last_bf; |
| 1213 | #endif |
| 1214 | |
| 1215 | void |
| 1216 | coff_frob_symbol (symbolS *symp, int *punt) |
| 1217 | { |
| 1218 | static symbolS *last_tagP; |
| 1219 | static stack *block_stack; |
| 1220 | static symbolS *set_end; |
| 1221 | symbolS *next_set_end = NULL; |
| 1222 | |
| 1223 | if (symp == &abs_symbol) |
| 1224 | { |
| 1225 | *punt = 1; |
| 1226 | return; |
| 1227 | } |
| 1228 | |
| 1229 | if (current_lineno_sym) |
| 1230 | coff_add_linesym (NULL); |
| 1231 | |
| 1232 | if (!block_stack) |
| 1233 | block_stack = stack_init (512, sizeof (symbolS*)); |
| 1234 | |
| 1235 | #ifdef TE_PE |
| 1236 | if (S_GET_STORAGE_CLASS (symp) == C_NT_WEAK |
| 1237 | && ! S_IS_WEAK (symp) |
| 1238 | && weak_is_altname (S_GET_NAME (symp))) |
| 1239 | { |
| 1240 | /* This is a weak alternate symbol. All processing of |
| 1241 | PECOFFweak symbols is done here, through the alternate. */ |
| 1242 | symbolS *weakp = symbol_find_noref (weak_altname2name |
| 1243 | (S_GET_NAME (symp)), 1); |
| 1244 | |
| 1245 | gas_assert (weakp); |
| 1246 | gas_assert (S_GET_NUMBER_AUXILIARY (weakp) == 1); |
| 1247 | |
| 1248 | if (! S_IS_WEAK (weakp)) |
| 1249 | { |
| 1250 | /* The symbol was turned from weak to strong. Discard altname. */ |
| 1251 | *punt = 1; |
| 1252 | return; |
| 1253 | } |
| 1254 | else if (symbol_equated_p (weakp)) |
| 1255 | { |
| 1256 | /* The weak symbol has an alternate specified; symp is unneeded. */ |
| 1257 | S_SET_STORAGE_CLASS (weakp, C_NT_WEAK); |
| 1258 | SA_SET_SYM_TAGNDX (weakp, |
| 1259 | symbol_get_value_expression (weakp)->X_add_symbol); |
| 1260 | |
| 1261 | S_CLEAR_EXTERNAL (symp); |
| 1262 | *punt = 1; |
| 1263 | return; |
| 1264 | } |
| 1265 | else |
| 1266 | { |
| 1267 | /* The weak symbol has been assigned an alternate value. |
| 1268 | Copy this value to symp, and set symp as weakp's alternate. */ |
| 1269 | if (S_GET_STORAGE_CLASS (weakp) != C_NT_WEAK) |
| 1270 | { |
| 1271 | S_SET_STORAGE_CLASS (symp, S_GET_STORAGE_CLASS (weakp)); |
| 1272 | S_SET_STORAGE_CLASS (weakp, C_NT_WEAK); |
| 1273 | } |
| 1274 | |
| 1275 | if (S_IS_DEFINED (weakp)) |
| 1276 | { |
| 1277 | /* This is a defined weak symbol. Copy value information |
| 1278 | from the weak symbol itself to the alternate symbol. */ |
| 1279 | symbol_set_value_expression (symp, |
| 1280 | symbol_get_value_expression (weakp)); |
| 1281 | symbol_set_frag (symp, symbol_get_frag (weakp)); |
| 1282 | S_SET_SEGMENT (symp, S_GET_SEGMENT (weakp)); |
| 1283 | } |
| 1284 | else |
| 1285 | { |
| 1286 | /* This is an undefined weak symbol. |
| 1287 | Define the alternate symbol to zero. */ |
| 1288 | S_SET_VALUE (symp, 0); |
| 1289 | S_SET_SEGMENT (symp, absolute_section); |
| 1290 | } |
| 1291 | |
| 1292 | S_SET_NAME (symp, weak_uniquify (S_GET_NAME (symp))); |
| 1293 | S_SET_STORAGE_CLASS (symp, C_EXT); |
| 1294 | |
| 1295 | S_SET_VALUE (weakp, 0); |
| 1296 | S_SET_SEGMENT (weakp, undefined_section); |
| 1297 | } |
| 1298 | } |
| 1299 | #else /* TE_PE */ |
| 1300 | if (S_IS_WEAK (symp)) |
| 1301 | S_SET_STORAGE_CLASS (symp, C_WEAKEXT); |
| 1302 | #endif /* TE_PE */ |
| 1303 | |
| 1304 | if (!S_IS_DEFINED (symp) |
| 1305 | && !S_IS_WEAK (symp) |
| 1306 | && S_GET_STORAGE_CLASS (symp) != C_STAT) |
| 1307 | S_SET_STORAGE_CLASS (symp, C_EXT); |
| 1308 | |
| 1309 | if (!SF_GET_DEBUG (symp)) |
| 1310 | { |
| 1311 | symbolS * real; |
| 1312 | |
| 1313 | if (!SF_GET_LOCAL (symp) |
| 1314 | && !SF_GET_STATICS (symp) |
| 1315 | && S_GET_STORAGE_CLASS (symp) != C_LABEL |
| 1316 | && symbol_constant_p (symp) |
| 1317 | && (real = symbol_find_noref (S_GET_NAME (symp), 1)) |
| 1318 | && S_GET_STORAGE_CLASS (real) == C_NULL |
| 1319 | && real != symp) |
| 1320 | { |
| 1321 | c_symbol_merge (symp, real); |
| 1322 | *punt = 1; |
| 1323 | return; |
| 1324 | } |
| 1325 | |
| 1326 | if (!S_IS_DEFINED (symp) && !SF_GET_LOCAL (symp)) |
| 1327 | { |
| 1328 | gas_assert (S_GET_VALUE (symp) == 0); |
| 1329 | if (S_IS_WEAKREFD (symp)) |
| 1330 | *punt = 1; |
| 1331 | else |
| 1332 | S_SET_EXTERNAL (symp); |
| 1333 | } |
| 1334 | else if (S_GET_STORAGE_CLASS (symp) == C_NULL) |
| 1335 | { |
| 1336 | if (S_GET_SEGMENT (symp) == text_section |
| 1337 | && symp != seg_info (text_section)->sym) |
| 1338 | S_SET_STORAGE_CLASS (symp, C_LABEL); |
| 1339 | else |
| 1340 | S_SET_STORAGE_CLASS (symp, C_STAT); |
| 1341 | } |
| 1342 | |
| 1343 | if (SF_GET_PROCESS (symp)) |
| 1344 | { |
| 1345 | if (S_GET_STORAGE_CLASS (symp) == C_BLOCK) |
| 1346 | { |
| 1347 | if (streq (S_GET_NAME (symp), ".bb")) |
| 1348 | stack_push (block_stack, (char *) &symp); |
| 1349 | else |
| 1350 | { |
| 1351 | symbolS *begin; |
| 1352 | |
| 1353 | begin = *(symbolS **) stack_pop (block_stack); |
| 1354 | if (begin == 0) |
| 1355 | as_warn (_("mismatched .eb")); |
| 1356 | else |
| 1357 | next_set_end = begin; |
| 1358 | } |
| 1359 | } |
| 1360 | |
| 1361 | if (coff_last_function == 0 && SF_GET_FUNCTION (symp) |
| 1362 | && S_IS_DEFINED (symp)) |
| 1363 | { |
| 1364 | union internal_auxent *auxp; |
| 1365 | |
| 1366 | coff_last_function = symp; |
| 1367 | if (S_GET_NUMBER_AUXILIARY (symp) < 1) |
| 1368 | S_SET_NUMBER_AUXILIARY (symp, 1); |
| 1369 | auxp = SYM_AUXENT (symp); |
| 1370 | memset (auxp->x_sym.x_fcnary.x_ary.x_dimen, 0, |
| 1371 | sizeof (auxp->x_sym.x_fcnary.x_ary.x_dimen)); |
| 1372 | } |
| 1373 | |
| 1374 | if (S_GET_STORAGE_CLASS (symp) == C_EFCN |
| 1375 | && S_IS_DEFINED (symp)) |
| 1376 | { |
| 1377 | if (coff_last_function == 0) |
| 1378 | as_fatal (_("C_EFCN symbol for %s out of scope"), |
| 1379 | S_GET_NAME (symp)); |
| 1380 | SA_SET_SYM_FSIZE (coff_last_function, |
| 1381 | (long) (S_GET_VALUE (symp) |
| 1382 | - S_GET_VALUE (coff_last_function))); |
| 1383 | next_set_end = coff_last_function; |
| 1384 | coff_last_function = 0; |
| 1385 | } |
| 1386 | } |
| 1387 | |
| 1388 | if (S_IS_EXTERNAL (symp)) |
| 1389 | S_SET_STORAGE_CLASS (symp, C_EXT); |
| 1390 | else if (SF_GET_LOCAL (symp)) |
| 1391 | *punt = 1; |
| 1392 | |
| 1393 | if (SF_GET_FUNCTION (symp)) |
| 1394 | symbol_get_bfdsym (symp)->flags |= BSF_FUNCTION; |
| 1395 | } |
| 1396 | |
| 1397 | /* Double check weak symbols. */ |
| 1398 | if (S_IS_WEAK (symp) && S_IS_COMMON (symp)) |
| 1399 | as_bad (_("Symbol `%s' can not be both weak and common"), |
| 1400 | S_GET_NAME (symp)); |
| 1401 | |
| 1402 | if (SF_GET_TAG (symp)) |
| 1403 | last_tagP = symp; |
| 1404 | else if (S_GET_STORAGE_CLASS (symp) == C_EOS) |
| 1405 | next_set_end = last_tagP; |
| 1406 | |
| 1407 | #ifdef OBJ_XCOFF |
| 1408 | /* This is pretty horrible, but we have to set *punt correctly in |
| 1409 | order to call SA_SET_SYM_ENDNDX correctly. */ |
| 1410 | if (! symbol_used_in_reloc_p (symp) |
| 1411 | && ((symbol_get_bfdsym (symp)->flags & BSF_SECTION_SYM) != 0 |
| 1412 | || (! (S_IS_EXTERNAL (symp) || S_IS_WEAK (symp)) |
| 1413 | && ! symbol_get_tc (symp)->output |
| 1414 | && S_GET_STORAGE_CLASS (symp) != C_FILE))) |
| 1415 | *punt = 1; |
| 1416 | #endif |
| 1417 | |
| 1418 | if (set_end != (symbolS *) NULL |
| 1419 | && ! *punt |
| 1420 | && ((symbol_get_bfdsym (symp)->flags & BSF_NOT_AT_END) != 0 |
| 1421 | || (S_IS_DEFINED (symp) |
| 1422 | && ! S_IS_COMMON (symp) |
| 1423 | && (! S_IS_EXTERNAL (symp) || SF_GET_FUNCTION (symp))))) |
| 1424 | { |
| 1425 | SA_SET_SYM_ENDNDX (set_end, symp); |
| 1426 | set_end = NULL; |
| 1427 | } |
| 1428 | |
| 1429 | if (next_set_end != NULL) |
| 1430 | { |
| 1431 | if (set_end != NULL) |
| 1432 | as_warn (_("Warning: internal error: forgetting to set endndx of %s"), |
| 1433 | S_GET_NAME (set_end)); |
| 1434 | set_end = next_set_end; |
| 1435 | } |
| 1436 | |
| 1437 | #ifndef OBJ_XCOFF |
| 1438 | if (! *punt |
| 1439 | && S_GET_STORAGE_CLASS (symp) == C_FCN |
| 1440 | && streq (S_GET_NAME (symp), ".bf")) |
| 1441 | { |
| 1442 | if (coff_last_bf != NULL) |
| 1443 | SA_SET_SYM_ENDNDX (coff_last_bf, symp); |
| 1444 | coff_last_bf = symp; |
| 1445 | } |
| 1446 | #endif |
| 1447 | if (coffsymbol (symbol_get_bfdsym (symp))->lineno) |
| 1448 | { |
| 1449 | int i; |
| 1450 | struct line_no *lptr; |
| 1451 | alent *l; |
| 1452 | |
| 1453 | lptr = (struct line_no *) coffsymbol (symbol_get_bfdsym (symp))->lineno; |
| 1454 | for (i = 0; lptr; lptr = lptr->next) |
| 1455 | i++; |
| 1456 | lptr = (struct line_no *) coffsymbol (symbol_get_bfdsym (symp))->lineno; |
| 1457 | |
| 1458 | /* We need i entries for line numbers, plus 1 for the first |
| 1459 | entry which BFD will override, plus 1 for the last zero |
| 1460 | entry (a marker for BFD). */ |
| 1461 | l = xmalloc ((i + 2) * sizeof (* l)); |
| 1462 | coffsymbol (symbol_get_bfdsym (symp))->lineno = l; |
| 1463 | l[i + 1].line_number = 0; |
| 1464 | l[i + 1].u.sym = NULL; |
| 1465 | for (; i > 0; i--) |
| 1466 | { |
| 1467 | if (lptr->frag) |
| 1468 | lptr->l.u.offset += lptr->frag->fr_address / OCTETS_PER_BYTE; |
| 1469 | l[i] = lptr->l; |
| 1470 | lptr = lptr->next; |
| 1471 | } |
| 1472 | } |
| 1473 | } |
| 1474 | |
| 1475 | void |
| 1476 | coff_adjust_section_syms (bfd *abfd ATTRIBUTE_UNUSED, |
| 1477 | asection *sec, |
| 1478 | void * x ATTRIBUTE_UNUSED) |
| 1479 | { |
| 1480 | symbolS *secsym; |
| 1481 | segment_info_type *seginfo = seg_info (sec); |
| 1482 | int nlnno, nrelocs = 0; |
| 1483 | |
| 1484 | /* RS/6000 gas creates a .debug section manually in ppc_frob_file in |
| 1485 | tc-ppc.c. Do not get confused by it. */ |
| 1486 | if (seginfo == NULL) |
| 1487 | return; |
| 1488 | |
| 1489 | if (streq (sec->name, ".text")) |
| 1490 | nlnno = coff_n_line_nos; |
| 1491 | else |
| 1492 | nlnno = 0; |
| 1493 | { |
| 1494 | /* @@ Hope that none of the fixups expand to more than one reloc |
| 1495 | entry... */ |
| 1496 | fixS *fixp = seginfo->fix_root; |
| 1497 | while (fixp) |
| 1498 | { |
| 1499 | if (! fixp->fx_done) |
| 1500 | nrelocs++; |
| 1501 | fixp = fixp->fx_next; |
| 1502 | } |
| 1503 | } |
| 1504 | if (bfd_get_section_size (sec) == 0 |
| 1505 | && nrelocs == 0 |
| 1506 | && nlnno == 0 |
| 1507 | && sec != text_section |
| 1508 | && sec != data_section |
| 1509 | && sec != bss_section) |
| 1510 | return; |
| 1511 | |
| 1512 | secsym = section_symbol (sec); |
| 1513 | /* This is an estimate; we'll plug in the real value using |
| 1514 | SET_SECTION_RELOCS later */ |
| 1515 | SA_SET_SCN_NRELOC (secsym, nrelocs); |
| 1516 | SA_SET_SCN_NLINNO (secsym, nlnno); |
| 1517 | } |
| 1518 | |
| 1519 | void |
| 1520 | coff_frob_file_after_relocs (void) |
| 1521 | { |
| 1522 | bfd_map_over_sections (stdoutput, coff_adjust_section_syms, NULL); |
| 1523 | } |
| 1524 | |
| 1525 | /* Implement the .section pseudo op: |
| 1526 | .section name {, "flags"} |
| 1527 | ^ ^ |
| 1528 | | +--- optional flags: 'b' for bss |
| 1529 | | 'i' for info |
| 1530 | +-- section name 'l' for lib |
| 1531 | 'n' for noload |
| 1532 | 'o' for over |
| 1533 | 'w' for data |
| 1534 | 'd' (apparently m88k for data) |
| 1535 | 'e' for exclude |
| 1536 | 'x' for text |
| 1537 | 'r' for read-only data |
| 1538 | 's' for shared data (PE) |
| 1539 | 'y' for noread |
| 1540 | '0' - '9' for power-of-two alignment (GNU extension). |
| 1541 | But if the argument is not a quoted string, treat it as a |
| 1542 | subsegment number. |
| 1543 | |
| 1544 | Note the 'a' flag is silently ignored. This allows the same |
| 1545 | .section directive to be parsed in both ELF and COFF formats. */ |
| 1546 | |
| 1547 | void |
| 1548 | obj_coff_section (int ignore ATTRIBUTE_UNUSED) |
| 1549 | { |
| 1550 | /* Strip out the section name. */ |
| 1551 | char *section_name; |
| 1552 | char c; |
| 1553 | int alignment = -1; |
| 1554 | char *name; |
| 1555 | unsigned int exp; |
| 1556 | flagword flags, oldflags; |
| 1557 | asection *sec; |
| 1558 | |
| 1559 | if (flag_mri) |
| 1560 | { |
| 1561 | char type; |
| 1562 | |
| 1563 | s_mri_sect (&type); |
| 1564 | return; |
| 1565 | } |
| 1566 | |
| 1567 | section_name = input_line_pointer; |
| 1568 | c = get_symbol_end (); |
| 1569 | |
| 1570 | name = xmalloc (input_line_pointer - section_name + 1); |
| 1571 | strcpy (name, section_name); |
| 1572 | |
| 1573 | *input_line_pointer = c; |
| 1574 | |
| 1575 | SKIP_WHITESPACE (); |
| 1576 | |
| 1577 | exp = 0; |
| 1578 | flags = SEC_NO_FLAGS; |
| 1579 | |
| 1580 | if (*input_line_pointer == ',') |
| 1581 | { |
| 1582 | ++input_line_pointer; |
| 1583 | SKIP_WHITESPACE (); |
| 1584 | if (*input_line_pointer != '"') |
| 1585 | exp = get_absolute_expression (); |
| 1586 | else |
| 1587 | { |
| 1588 | unsigned char attr; |
| 1589 | int readonly_removed = 0; |
| 1590 | int load_removed = 0; |
| 1591 | |
| 1592 | while (attr = *++input_line_pointer, |
| 1593 | attr != '"' |
| 1594 | && ! is_end_of_line[attr]) |
| 1595 | { |
| 1596 | if (ISDIGIT (attr)) |
| 1597 | { |
| 1598 | alignment = attr - '0'; |
| 1599 | continue; |
| 1600 | } |
| 1601 | switch (attr) |
| 1602 | { |
| 1603 | case 'e': |
| 1604 | /* Exclude section from linking. */ |
| 1605 | flags |= SEC_EXCLUDE; |
| 1606 | break; |
| 1607 | |
| 1608 | case 'b': |
| 1609 | /* Uninitialised data section. */ |
| 1610 | flags |= SEC_ALLOC; |
| 1611 | flags &=~ SEC_LOAD; |
| 1612 | break; |
| 1613 | |
| 1614 | case 'n': |
| 1615 | /* Section not loaded. */ |
| 1616 | flags &=~ SEC_LOAD; |
| 1617 | flags |= SEC_NEVER_LOAD; |
| 1618 | load_removed = 1; |
| 1619 | break; |
| 1620 | |
| 1621 | case 's': |
| 1622 | /* Shared section. */ |
| 1623 | flags |= SEC_COFF_SHARED; |
| 1624 | /* Fall through. */ |
| 1625 | case 'd': |
| 1626 | /* Data section. */ |
| 1627 | flags |= SEC_DATA; |
| 1628 | if (! load_removed) |
| 1629 | flags |= SEC_LOAD; |
| 1630 | flags &=~ SEC_READONLY; |
| 1631 | break; |
| 1632 | |
| 1633 | case 'w': |
| 1634 | /* Writable section. */ |
| 1635 | flags &=~ SEC_READONLY; |
| 1636 | readonly_removed = 1; |
| 1637 | break; |
| 1638 | |
| 1639 | case 'a': |
| 1640 | /* Ignore. Here for compatibility with ELF. */ |
| 1641 | break; |
| 1642 | |
| 1643 | case 'r': /* Read-only section. Implies a data section. */ |
| 1644 | readonly_removed = 0; |
| 1645 | /* Fall through. */ |
| 1646 | case 'x': /* Executable section. */ |
| 1647 | /* If we are setting the 'x' attribute or if the 'r' |
| 1648 | attribute is being used to restore the readonly status |
| 1649 | of a code section (eg "wxr") then set the SEC_CODE flag, |
| 1650 | otherwise set the SEC_DATA flag. */ |
| 1651 | flags |= (attr == 'x' || (flags & SEC_CODE) ? SEC_CODE : SEC_DATA); |
| 1652 | if (! load_removed) |
| 1653 | flags |= SEC_LOAD; |
| 1654 | /* Note - the READONLY flag is set here, even for the 'x' |
| 1655 | attribute in order to be compatible with the MSVC |
| 1656 | linker. */ |
| 1657 | if (! readonly_removed) |
| 1658 | flags |= SEC_READONLY; |
| 1659 | break; |
| 1660 | |
| 1661 | case 'y': |
| 1662 | flags |= SEC_COFF_NOREAD | SEC_READONLY; |
| 1663 | break; |
| 1664 | |
| 1665 | case 'i': /* STYP_INFO */ |
| 1666 | case 'l': /* STYP_LIB */ |
| 1667 | case 'o': /* STYP_OVER */ |
| 1668 | as_warn (_("unsupported section attribute '%c'"), attr); |
| 1669 | break; |
| 1670 | |
| 1671 | default: |
| 1672 | as_warn (_("unknown section attribute '%c'"), attr); |
| 1673 | break; |
| 1674 | } |
| 1675 | } |
| 1676 | if (attr == '"') |
| 1677 | ++input_line_pointer; |
| 1678 | } |
| 1679 | } |
| 1680 | |
| 1681 | sec = subseg_new (name, (subsegT) exp); |
| 1682 | |
| 1683 | if (alignment >= 0) |
| 1684 | sec->alignment_power = alignment; |
| 1685 | |
| 1686 | oldflags = bfd_get_section_flags (stdoutput, sec); |
| 1687 | if (oldflags == SEC_NO_FLAGS) |
| 1688 | { |
| 1689 | /* Set section flags for a new section just created by subseg_new. |
| 1690 | Provide a default if no flags were parsed. */ |
| 1691 | if (flags == SEC_NO_FLAGS) |
| 1692 | flags = TC_COFF_SECTION_DEFAULT_ATTRIBUTES; |
| 1693 | |
| 1694 | #ifdef COFF_LONG_SECTION_NAMES |
| 1695 | /* Add SEC_LINK_ONCE and SEC_LINK_DUPLICATES_DISCARD to .gnu.linkonce |
| 1696 | sections so adjust_reloc_syms in write.c will correctly handle |
| 1697 | relocs which refer to non-local symbols in these sections. */ |
| 1698 | if (strneq (name, ".gnu.linkonce", sizeof (".gnu.linkonce") - 1)) |
| 1699 | flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD; |
| 1700 | #endif |
| 1701 | |
| 1702 | if (! bfd_set_section_flags (stdoutput, sec, flags)) |
| 1703 | as_warn (_("error setting flags for \"%s\": %s"), |
| 1704 | bfd_section_name (stdoutput, sec), |
| 1705 | bfd_errmsg (bfd_get_error ())); |
| 1706 | } |
| 1707 | else if (flags != SEC_NO_FLAGS) |
| 1708 | { |
| 1709 | /* This section's attributes have already been set. Warn if the |
| 1710 | attributes don't match. */ |
| 1711 | flagword matchflags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE |
| 1712 | | SEC_DATA | SEC_COFF_SHARED | SEC_NEVER_LOAD |
| 1713 | | SEC_COFF_NOREAD); |
| 1714 | if ((flags ^ oldflags) & matchflags) |
| 1715 | as_warn (_("Ignoring changed section attributes for %s"), name); |
| 1716 | } |
| 1717 | |
| 1718 | demand_empty_rest_of_line (); |
| 1719 | } |
| 1720 | |
| 1721 | void |
| 1722 | coff_adjust_symtab (void) |
| 1723 | { |
| 1724 | if (symbol_rootP == NULL |
| 1725 | || S_GET_STORAGE_CLASS (symbol_rootP) != C_FILE) |
| 1726 | c_dot_file_symbol ("fake", 0); |
| 1727 | } |
| 1728 | |
| 1729 | void |
| 1730 | coff_frob_section (segT sec) |
| 1731 | { |
| 1732 | segT strsec; |
| 1733 | char *p; |
| 1734 | fragS *fragp; |
| 1735 | bfd_vma n_entries; |
| 1736 | |
| 1737 | /* The COFF back end in BFD requires that all section sizes be |
| 1738 | rounded up to multiples of the corresponding section alignments, |
| 1739 | supposedly because standard COFF has no other way of encoding alignment |
| 1740 | for sections. If your COFF flavor has a different way of encoding |
| 1741 | section alignment, then skip this step, as TICOFF does. */ |
| 1742 | bfd_vma size = bfd_get_section_size (sec); |
| 1743 | #if !defined(TICOFF) |
| 1744 | bfd_vma align_power = (bfd_vma) sec->alignment_power + OCTETS_PER_BYTE_POWER; |
| 1745 | bfd_vma mask = ((bfd_vma) 1 << align_power) - 1; |
| 1746 | |
| 1747 | if (size & mask) |
| 1748 | { |
| 1749 | bfd_vma new_size; |
| 1750 | fragS *last; |
| 1751 | |
| 1752 | new_size = (size + mask) & ~mask; |
| 1753 | bfd_set_section_size (stdoutput, sec, new_size); |
| 1754 | |
| 1755 | /* If the size had to be rounded up, add some padding in |
| 1756 | the last non-empty frag. */ |
| 1757 | fragp = seg_info (sec)->frchainP->frch_root; |
| 1758 | last = seg_info (sec)->frchainP->frch_last; |
| 1759 | while (fragp->fr_next != last) |
| 1760 | fragp = fragp->fr_next; |
| 1761 | last->fr_address = size; |
| 1762 | fragp->fr_offset += new_size - size; |
| 1763 | } |
| 1764 | #endif |
| 1765 | |
| 1766 | /* If the section size is non-zero, the section symbol needs an aux |
| 1767 | entry associated with it, indicating the size. We don't know |
| 1768 | all the values yet; coff_frob_symbol will fill them in later. */ |
| 1769 | #ifndef TICOFF |
| 1770 | if (size != 0 |
| 1771 | || sec == text_section |
| 1772 | || sec == data_section |
| 1773 | || sec == bss_section) |
| 1774 | #endif |
| 1775 | { |
| 1776 | symbolS *secsym = section_symbol (sec); |
| 1777 | unsigned char sclass = C_STAT; |
| 1778 | |
| 1779 | #ifdef OBJ_XCOFF |
| 1780 | if (bfd_get_section_flags (stdoutput, sec) & SEC_DEBUGGING) |
| 1781 | sclass = C_DWARF; |
| 1782 | #endif |
| 1783 | S_SET_STORAGE_CLASS (secsym, sclass); |
| 1784 | S_SET_NUMBER_AUXILIARY (secsym, 1); |
| 1785 | SF_SET_STATICS (secsym); |
| 1786 | SA_SET_SCN_SCNLEN (secsym, size); |
| 1787 | } |
| 1788 | /* FIXME: These should be in a "stabs.h" file, or maybe as.h. */ |
| 1789 | #ifndef STAB_SECTION_NAME |
| 1790 | #define STAB_SECTION_NAME ".stab" |
| 1791 | #endif |
| 1792 | #ifndef STAB_STRING_SECTION_NAME |
| 1793 | #define STAB_STRING_SECTION_NAME ".stabstr" |
| 1794 | #endif |
| 1795 | if (! streq (STAB_STRING_SECTION_NAME, sec->name)) |
| 1796 | return; |
| 1797 | |
| 1798 | strsec = sec; |
| 1799 | sec = subseg_get (STAB_SECTION_NAME, 0); |
| 1800 | /* size is already rounded up, since other section will be listed first */ |
| 1801 | size = bfd_get_section_size (strsec); |
| 1802 | |
| 1803 | n_entries = bfd_get_section_size (sec) / 12 - 1; |
| 1804 | |
| 1805 | /* Find first non-empty frag. It should be large enough. */ |
| 1806 | fragp = seg_info (sec)->frchainP->frch_root; |
| 1807 | while (fragp && fragp->fr_fix == 0) |
| 1808 | fragp = fragp->fr_next; |
| 1809 | gas_assert (fragp != 0 && fragp->fr_fix >= 12); |
| 1810 | |
| 1811 | /* Store the values. */ |
| 1812 | p = fragp->fr_literal; |
| 1813 | bfd_h_put_16 (stdoutput, n_entries, (bfd_byte *) p + 6); |
| 1814 | bfd_h_put_32 (stdoutput, size, (bfd_byte *) p + 8); |
| 1815 | } |
| 1816 | |
| 1817 | void |
| 1818 | obj_coff_init_stab_section (segT seg) |
| 1819 | { |
| 1820 | char *file; |
| 1821 | char *p; |
| 1822 | char *stabstr_name; |
| 1823 | unsigned int stroff; |
| 1824 | |
| 1825 | /* Make space for this first symbol. */ |
| 1826 | p = frag_more (12); |
| 1827 | /* Zero it out. */ |
| 1828 | memset (p, 0, 12); |
| 1829 | as_where (&file, (unsigned int *) NULL); |
| 1830 | stabstr_name = xmalloc (strlen (seg->name) + 4); |
| 1831 | strcpy (stabstr_name, seg->name); |
| 1832 | strcat (stabstr_name, "str"); |
| 1833 | stroff = get_stab_string_offset (file, stabstr_name); |
| 1834 | know (stroff == 1); |
| 1835 | md_number_to_chars (p, stroff, 4); |
| 1836 | } |
| 1837 | |
| 1838 | #ifdef DEBUG |
| 1839 | const char * s_get_name (symbolS *); |
| 1840 | |
| 1841 | const char * |
| 1842 | s_get_name (symbolS *s) |
| 1843 | { |
| 1844 | return ((s == NULL) ? "(NULL)" : S_GET_NAME (s)); |
| 1845 | } |
| 1846 | |
| 1847 | void symbol_dump (void); |
| 1848 | |
| 1849 | void |
| 1850 | symbol_dump (void) |
| 1851 | { |
| 1852 | symbolS *symbolP; |
| 1853 | |
| 1854 | for (symbolP = symbol_rootP; symbolP; symbolP = symbol_next (symbolP)) |
| 1855 | printf (_("0x%lx: \"%s\" type = %ld, class = %d, segment = %d\n"), |
| 1856 | (unsigned long) symbolP, |
| 1857 | S_GET_NAME (symbolP), |
| 1858 | (long) S_GET_DATA_TYPE (symbolP), |
| 1859 | S_GET_STORAGE_CLASS (symbolP), |
| 1860 | (int) S_GET_SEGMENT (symbolP)); |
| 1861 | } |
| 1862 | |
| 1863 | #endif /* DEBUG */ |
| 1864 | |
| 1865 | const pseudo_typeS coff_pseudo_table[] = |
| 1866 | { |
| 1867 | {"ABORT", s_abort, 0}, |
| 1868 | {"appline", obj_coff_ln, 1}, |
| 1869 | /* We accept the .bss directive for backward compatibility with |
| 1870 | earlier versions of gas. */ |
| 1871 | {"bss", obj_coff_bss, 0}, |
| 1872 | #ifdef TE_PE |
| 1873 | /* PE provides an enhanced version of .comm with alignment. */ |
| 1874 | {"comm", obj_coff_comm, 0}, |
| 1875 | #endif /* TE_PE */ |
| 1876 | {"def", obj_coff_def, 0}, |
| 1877 | {"dim", obj_coff_dim, 0}, |
| 1878 | {"endef", obj_coff_endef, 0}, |
| 1879 | {"ident", obj_coff_ident, 0}, |
| 1880 | {"line", obj_coff_line, 0}, |
| 1881 | {"ln", obj_coff_ln, 0}, |
| 1882 | {"scl", obj_coff_scl, 0}, |
| 1883 | {"sect", obj_coff_section, 0}, |
| 1884 | {"sect.s", obj_coff_section, 0}, |
| 1885 | {"section", obj_coff_section, 0}, |
| 1886 | {"section.s", obj_coff_section, 0}, |
| 1887 | /* FIXME: We ignore the MRI short attribute. */ |
| 1888 | {"size", obj_coff_size, 0}, |
| 1889 | {"tag", obj_coff_tag, 0}, |
| 1890 | {"type", obj_coff_type, 0}, |
| 1891 | {"val", obj_coff_val, 0}, |
| 1892 | {"version", s_ignore, 0}, |
| 1893 | {"loc", obj_coff_loc, 0}, |
| 1894 | {"optim", s_ignore, 0}, /* For sun386i cc (?) */ |
| 1895 | {"weak", obj_coff_weak, 0}, |
| 1896 | #if defined TC_TIC4X |
| 1897 | /* The tic4x uses sdef instead of def. */ |
| 1898 | {"sdef", obj_coff_def, 0}, |
| 1899 | #endif |
| 1900 | #if defined(SEH_CMDS) |
| 1901 | SEH_CMDS |
| 1902 | #endif |
| 1903 | {NULL, NULL, 0} |
| 1904 | }; |
| 1905 | \f |
| 1906 | |
| 1907 | /* Support for a COFF emulation. */ |
| 1908 | |
| 1909 | static void |
| 1910 | coff_pop_insert (void) |
| 1911 | { |
| 1912 | pop_insert (coff_pseudo_table); |
| 1913 | } |
| 1914 | |
| 1915 | static int |
| 1916 | coff_separate_stab_sections (void) |
| 1917 | { |
| 1918 | return 1; |
| 1919 | } |
| 1920 | |
| 1921 | const struct format_ops coff_format_ops = |
| 1922 | { |
| 1923 | bfd_target_coff_flavour, |
| 1924 | 0, /* dfl_leading_underscore */ |
| 1925 | 1, /* emit_section_symbols */ |
| 1926 | 0, /* begin */ |
| 1927 | c_dot_file_symbol, |
| 1928 | coff_frob_symbol, |
| 1929 | 0, /* frob_file */ |
| 1930 | 0, /* frob_file_before_adjust */ |
| 1931 | 0, /* frob_file_before_fix */ |
| 1932 | coff_frob_file_after_relocs, |
| 1933 | 0, /* s_get_size */ |
| 1934 | 0, /* s_set_size */ |
| 1935 | 0, /* s_get_align */ |
| 1936 | 0, /* s_set_align */ |
| 1937 | 0, /* s_get_other */ |
| 1938 | 0, /* s_set_other */ |
| 1939 | 0, /* s_get_desc */ |
| 1940 | 0, /* s_set_desc */ |
| 1941 | 0, /* s_get_type */ |
| 1942 | 0, /* s_set_type */ |
| 1943 | 0, /* copy_symbol_attributes */ |
| 1944 | 0, /* generate_asm_lineno */ |
| 1945 | 0, /* process_stab */ |
| 1946 | coff_separate_stab_sections, |
| 1947 | obj_coff_init_stab_section, |
| 1948 | 0, /* sec_sym_ok_for_reloc */ |
| 1949 | coff_pop_insert, |
| 1950 | 0, /* ecoff_set_ext */ |
| 1951 | coff_obj_read_begin_hook, |
| 1952 | coff_obj_symbol_new_hook, |
| 1953 | coff_obj_symbol_clone_hook, |
| 1954 | coff_adjust_symtab |
| 1955 | }; |