| 1 | /* COFF specific linker code. |
| 2 | Copyright 1994 Free Software Foundation, Inc. |
| 3 | Written by Ian Lance Taylor, Cygnus Support. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 20 | |
| 21 | /* This file contains the COFF backend linker code. */ |
| 22 | |
| 23 | #include "bfd.h" |
| 24 | #include "sysdep.h" |
| 25 | #include "bfdlink.h" |
| 26 | #include "libbfd.h" |
| 27 | #include "coff/internal.h" |
| 28 | #include "libcoff.h" |
| 29 | |
| 30 | #define STRING_SIZE_SIZE (4) |
| 31 | |
| 32 | /* Information we keep for each section in the output file when doing |
| 33 | a relocateable link. */ |
| 34 | |
| 35 | struct coff_link_section_info |
| 36 | { |
| 37 | /* The relocs to be output. */ |
| 38 | struct internal_reloc *relocs; |
| 39 | /* For each reloc against a global symbol whose index was not known |
| 40 | when the reloc was handled, the global hash table entry. */ |
| 41 | struct coff_link_hash_entry **rel_hashes; |
| 42 | }; |
| 43 | |
| 44 | /* Information that we pass around while doing the final link step. */ |
| 45 | |
| 46 | struct coff_final_link_info |
| 47 | { |
| 48 | /* General link information. */ |
| 49 | struct bfd_link_info *info; |
| 50 | /* Output BFD. */ |
| 51 | bfd *output_bfd; |
| 52 | /* Used to indicate failure in traversal routine. */ |
| 53 | boolean failed; |
| 54 | /* Hash table for long symbol name. */ |
| 55 | struct bfd_strtab_hash *strtab; |
| 56 | /* When doing a relocateable link, an array of information kept for |
| 57 | each output section, indexed by the target_index field. */ |
| 58 | struct coff_link_section_info *section_info; |
| 59 | /* Symbol index of last C_FILE symbol (-1 if none). */ |
| 60 | long last_file_index; |
| 61 | /* Contents of last C_FILE symbol. */ |
| 62 | struct internal_syment last_file; |
| 63 | /* Buffer large enough to hold swapped symbols of any input file. */ |
| 64 | struct internal_syment *internal_syms; |
| 65 | /* Buffer large enough to hold sections of symbols of any input file. */ |
| 66 | asection **sec_ptrs; |
| 67 | /* Buffer large enough to hold output indices of symbols of any |
| 68 | input file. */ |
| 69 | long *sym_indices; |
| 70 | /* Buffer large enough to hold output symbols for any input file. */ |
| 71 | bfd_byte *outsyms; |
| 72 | /* Buffer large enough to hold external line numbers for any input |
| 73 | section. */ |
| 74 | bfd_byte *linenos; |
| 75 | /* Buffer large enough to hold any input section. */ |
| 76 | bfd_byte *contents; |
| 77 | /* Buffer large enough to hold external relocs of any input section. */ |
| 78 | bfd_byte *external_relocs; |
| 79 | /* Buffer large enough to hold swapped relocs of any input section. */ |
| 80 | struct internal_reloc *internal_relocs; |
| 81 | }; |
| 82 | |
| 83 | static struct bfd_hash_entry *coff_link_hash_newfunc |
| 84 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| 85 | static boolean coff_link_add_object_symbols |
| 86 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 87 | static boolean coff_link_check_archive_element |
| 88 | PARAMS ((bfd *, struct bfd_link_info *, boolean *)); |
| 89 | static boolean coff_link_get_symbols PARAMS ((bfd *)); |
| 90 | static const char *coff_read_string_table PARAMS ((bfd *)); |
| 91 | static boolean coff_link_free_symbols PARAMS ((bfd *)); |
| 92 | static boolean coff_link_check_ar_symbols |
| 93 | PARAMS ((bfd *, struct bfd_link_info *, boolean *)); |
| 94 | static boolean coff_link_add_symbols PARAMS ((bfd *, struct bfd_link_info *)); |
| 95 | static boolean coff_link_input_bfd |
| 96 | PARAMS ((struct coff_final_link_info *, bfd *)); |
| 97 | static boolean coff_write_global_sym |
| 98 | PARAMS ((struct coff_link_hash_entry *, PTR)); |
| 99 | static boolean coff_reloc_link_order |
| 100 | PARAMS ((bfd *, struct coff_final_link_info *, asection *, |
| 101 | struct bfd_link_order *)); |
| 102 | |
| 103 | /* Create an entry in a COFF linker hash table. */ |
| 104 | |
| 105 | static struct bfd_hash_entry * |
| 106 | coff_link_hash_newfunc (entry, table, string) |
| 107 | struct bfd_hash_entry *entry; |
| 108 | struct bfd_hash_table *table; |
| 109 | const char *string; |
| 110 | { |
| 111 | struct coff_link_hash_entry *ret = (struct coff_link_hash_entry *) entry; |
| 112 | |
| 113 | /* Allocate the structure if it has not already been allocated by a |
| 114 | subclass. */ |
| 115 | if (ret == (struct coff_link_hash_entry *) NULL) |
| 116 | ret = ((struct coff_link_hash_entry *) |
| 117 | bfd_hash_allocate (table, sizeof (struct coff_link_hash_entry))); |
| 118 | if (ret == (struct coff_link_hash_entry *) NULL) |
| 119 | { |
| 120 | bfd_set_error (bfd_error_no_memory); |
| 121 | return (struct bfd_hash_entry *) ret; |
| 122 | } |
| 123 | |
| 124 | /* Call the allocation method of the superclass. */ |
| 125 | ret = ((struct coff_link_hash_entry *) |
| 126 | _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 127 | table, string)); |
| 128 | if (ret != (struct coff_link_hash_entry *) NULL) |
| 129 | { |
| 130 | /* Set local fields. */ |
| 131 | ret->indx = -1; |
| 132 | ret->type = T_NULL; |
| 133 | ret->class = C_NULL; |
| 134 | ret->numaux = 0; |
| 135 | ret->auxbfd = NULL; |
| 136 | ret->aux = NULL; |
| 137 | } |
| 138 | |
| 139 | return (struct bfd_hash_entry *) ret; |
| 140 | } |
| 141 | |
| 142 | /* Create a COFF linker hash table. */ |
| 143 | |
| 144 | struct bfd_link_hash_table * |
| 145 | _bfd_coff_link_hash_table_create (abfd) |
| 146 | bfd *abfd; |
| 147 | { |
| 148 | struct coff_link_hash_table *ret; |
| 149 | |
| 150 | ret = ((struct coff_link_hash_table *) |
| 151 | malloc (sizeof (struct coff_link_hash_table))); |
| 152 | if (ret == NULL) |
| 153 | { |
| 154 | bfd_set_error (bfd_error_no_memory); |
| 155 | return NULL; |
| 156 | } |
| 157 | if (! _bfd_link_hash_table_init (&ret->root, abfd, |
| 158 | coff_link_hash_newfunc)) |
| 159 | { |
| 160 | free (ret); |
| 161 | return (struct bfd_link_hash_table *) NULL; |
| 162 | } |
| 163 | return &ret->root; |
| 164 | } |
| 165 | |
| 166 | /* Given a COFF BFD, add symbols to the global hash table as |
| 167 | appropriate. */ |
| 168 | |
| 169 | boolean |
| 170 | _bfd_coff_link_add_symbols (abfd, info) |
| 171 | bfd *abfd; |
| 172 | struct bfd_link_info *info; |
| 173 | { |
| 174 | switch (bfd_get_format (abfd)) |
| 175 | { |
| 176 | case bfd_object: |
| 177 | return coff_link_add_object_symbols (abfd, info); |
| 178 | case bfd_archive: |
| 179 | return (_bfd_generic_link_add_archive_symbols |
| 180 | (abfd, info, coff_link_check_archive_element)); |
| 181 | default: |
| 182 | bfd_set_error (bfd_error_wrong_format); |
| 183 | return false; |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | /* Add symbols from a COFF object file. */ |
| 188 | |
| 189 | static boolean |
| 190 | coff_link_add_object_symbols (abfd, info) |
| 191 | bfd *abfd; |
| 192 | struct bfd_link_info *info; |
| 193 | { |
| 194 | if (! coff_link_get_symbols (abfd)) |
| 195 | return false; |
| 196 | if (! coff_link_add_symbols (abfd, info)) |
| 197 | return false; |
| 198 | if (! info->keep_memory) |
| 199 | { |
| 200 | if (! coff_link_free_symbols (abfd)) |
| 201 | return false; |
| 202 | } |
| 203 | return true; |
| 204 | } |
| 205 | |
| 206 | /* Check a single archive element to see if we need to include it in |
| 207 | the link. *PNEEDED is set according to whether this element is |
| 208 | needed in the link or not. This is called via |
| 209 | _bfd_generic_link_add_archive_symbols. */ |
| 210 | |
| 211 | static boolean |
| 212 | coff_link_check_archive_element (abfd, info, pneeded) |
| 213 | bfd *abfd; |
| 214 | struct bfd_link_info *info; |
| 215 | boolean *pneeded; |
| 216 | { |
| 217 | if (! coff_link_get_symbols (abfd)) |
| 218 | return false; |
| 219 | |
| 220 | if (! coff_link_check_ar_symbols (abfd, info, pneeded)) |
| 221 | return false; |
| 222 | |
| 223 | if (*pneeded) |
| 224 | { |
| 225 | if (! coff_link_add_symbols (abfd, info)) |
| 226 | return false; |
| 227 | } |
| 228 | |
| 229 | if (! info->keep_memory || ! *pneeded) |
| 230 | { |
| 231 | if (! coff_link_free_symbols (abfd)) |
| 232 | return false; |
| 233 | } |
| 234 | |
| 235 | return true; |
| 236 | } |
| 237 | |
| 238 | /* Read in the external symbols. */ |
| 239 | |
| 240 | static boolean |
| 241 | coff_link_get_symbols (abfd) |
| 242 | bfd *abfd; |
| 243 | { |
| 244 | bfd_size_type symesz; |
| 245 | size_t size; |
| 246 | PTR syms; |
| 247 | |
| 248 | if (obj_coff_external_syms (abfd) != NULL) |
| 249 | return true; |
| 250 | |
| 251 | symesz = bfd_coff_symesz (abfd); |
| 252 | |
| 253 | size = obj_raw_syment_count (abfd) * symesz; |
| 254 | |
| 255 | syms = malloc (size); |
| 256 | if (syms == NULL && size != 0) |
| 257 | { |
| 258 | bfd_set_error (bfd_error_no_memory); |
| 259 | return false; |
| 260 | } |
| 261 | |
| 262 | if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0 |
| 263 | || bfd_read (syms, size, 1, abfd) != size) |
| 264 | { |
| 265 | if (syms != NULL) |
| 266 | free (syms); |
| 267 | return false; |
| 268 | } |
| 269 | |
| 270 | obj_coff_external_syms (abfd) = syms; |
| 271 | |
| 272 | return true; |
| 273 | } |
| 274 | |
| 275 | /* Read in the external strings. The strings are not loaded until |
| 276 | they are needed. This is because we have no simple way of |
| 277 | detecting a missing string table in an archive. */ |
| 278 | |
| 279 | static const char * |
| 280 | coff_read_string_table (abfd) |
| 281 | bfd *abfd; |
| 282 | { |
| 283 | char extstrsize[STRING_SIZE_SIZE]; |
| 284 | size_t strsize; |
| 285 | char *strings; |
| 286 | |
| 287 | if (obj_coff_strings (abfd) != NULL) |
| 288 | return obj_coff_strings (abfd); |
| 289 | |
| 290 | if (bfd_seek (abfd, |
| 291 | (obj_sym_filepos (abfd) |
| 292 | + obj_raw_syment_count (abfd) * bfd_coff_symesz (abfd)), |
| 293 | SEEK_SET) != 0) |
| 294 | return NULL; |
| 295 | |
| 296 | if (bfd_read (extstrsize, sizeof extstrsize, 1, abfd) != sizeof extstrsize) |
| 297 | { |
| 298 | if (bfd_get_error () != bfd_error_file_truncated) |
| 299 | return NULL; |
| 300 | |
| 301 | /* There is no string table. */ |
| 302 | strsize = STRING_SIZE_SIZE; |
| 303 | } |
| 304 | else |
| 305 | { |
| 306 | #if STRING_SIZE_SIZE == 4 |
| 307 | strsize = bfd_h_get_32 (abfd, extstrsize); |
| 308 | #else |
| 309 | #error Change bfd_h_get_32 |
| 310 | #endif |
| 311 | } |
| 312 | |
| 313 | strings = malloc (strsize); |
| 314 | if (strings == NULL) |
| 315 | { |
| 316 | bfd_set_error (bfd_error_no_memory); |
| 317 | return NULL; |
| 318 | } |
| 319 | |
| 320 | if (bfd_read (strings + STRING_SIZE_SIZE, |
| 321 | strsize - STRING_SIZE_SIZE, 1, abfd) |
| 322 | != strsize - STRING_SIZE_SIZE) |
| 323 | { |
| 324 | free (strings); |
| 325 | return NULL; |
| 326 | } |
| 327 | |
| 328 | obj_coff_strings (abfd) = strings; |
| 329 | |
| 330 | return strings; |
| 331 | } |
| 332 | |
| 333 | /* Free up the external symbols and strings read from a COFF file. */ |
| 334 | |
| 335 | static boolean |
| 336 | coff_link_free_symbols (abfd) |
| 337 | bfd *abfd; |
| 338 | { |
| 339 | if (obj_coff_external_syms (abfd) != NULL) |
| 340 | { |
| 341 | free (obj_coff_external_syms (abfd)); |
| 342 | obj_coff_external_syms (abfd) = NULL; |
| 343 | } |
| 344 | if (obj_coff_strings (abfd) != NULL) |
| 345 | { |
| 346 | free (obj_coff_strings (abfd)); |
| 347 | obj_coff_strings (abfd) = NULL; |
| 348 | } |
| 349 | return true; |
| 350 | } |
| 351 | |
| 352 | /* Look through the symbols to see if this object file should be |
| 353 | included in the link. */ |
| 354 | |
| 355 | static boolean |
| 356 | coff_link_check_ar_symbols (abfd, info, pneeded) |
| 357 | bfd *abfd; |
| 358 | struct bfd_link_info *info; |
| 359 | boolean *pneeded; |
| 360 | { |
| 361 | boolean (*sym_is_global) PARAMS ((bfd *, struct internal_syment *)); |
| 362 | const char *strings; |
| 363 | bfd_size_type symesz; |
| 364 | bfd_byte *esym; |
| 365 | bfd_byte *esym_end; |
| 366 | |
| 367 | *pneeded = false; |
| 368 | |
| 369 | sym_is_global = coff_backend_info (abfd)->_bfd_coff_sym_is_global; |
| 370 | strings = NULL; |
| 371 | |
| 372 | symesz = bfd_coff_symesz (abfd); |
| 373 | esym = (bfd_byte *) obj_coff_external_syms (abfd); |
| 374 | esym_end = esym + obj_raw_syment_count (abfd) * symesz; |
| 375 | while (esym < esym_end) |
| 376 | { |
| 377 | struct internal_syment sym; |
| 378 | |
| 379 | bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym); |
| 380 | |
| 381 | if ((sym.n_sclass == C_EXT |
| 382 | || (sym_is_global && (*sym_is_global) (abfd, &sym))) |
| 383 | && (sym.n_scnum != 0 || sym.n_value != 0)) |
| 384 | { |
| 385 | const char *name; |
| 386 | char buf[SYMNMLEN + 1]; |
| 387 | struct bfd_link_hash_entry *h; |
| 388 | |
| 389 | /* This symbol is externally visible, and is defined by this |
| 390 | object file. */ |
| 391 | |
| 392 | /* FIXME: It's not clear this will work correctly if sizeof |
| 393 | (_n_zeroes) != 4. */ |
| 394 | if (sym._n._n_n._n_zeroes != 0 |
| 395 | || sym._n._n_n._n_offset == 0) |
| 396 | { |
| 397 | memcpy (buf, sym._n._n_name, SYMNMLEN); |
| 398 | buf[SYMNMLEN] = '\0'; |
| 399 | name = buf; |
| 400 | } |
| 401 | else |
| 402 | { |
| 403 | BFD_ASSERT (sym._n._n_n._n_offset >= STRING_SIZE_SIZE); |
| 404 | if (strings == NULL) |
| 405 | { |
| 406 | strings = coff_read_string_table (abfd); |
| 407 | if (strings == NULL) |
| 408 | return false; |
| 409 | } |
| 410 | name = strings + sym._n._n_n._n_offset; |
| 411 | } |
| 412 | |
| 413 | h = bfd_link_hash_lookup (info->hash, name, false, false, true); |
| 414 | |
| 415 | /* We are only interested in symbols that are currently |
| 416 | undefined. If a symbol is currently known to be common, |
| 417 | COFF linkers do not bring in an object file which defines |
| 418 | it. */ |
| 419 | if (h != (struct bfd_link_hash_entry *) NULL |
| 420 | && h->type == bfd_link_hash_undefined) |
| 421 | { |
| 422 | if (! (*info->callbacks->add_archive_element) (info, abfd, name)) |
| 423 | return false; |
| 424 | *pneeded = true; |
| 425 | return true; |
| 426 | } |
| 427 | } |
| 428 | |
| 429 | esym += (sym.n_numaux + 1) * symesz; |
| 430 | } |
| 431 | |
| 432 | /* We do not need this object file. */ |
| 433 | return true; |
| 434 | } |
| 435 | |
| 436 | /* Add all the symbols from an object file to the hash table. */ |
| 437 | |
| 438 | static boolean |
| 439 | coff_link_add_symbols (abfd, info) |
| 440 | bfd *abfd; |
| 441 | struct bfd_link_info *info; |
| 442 | { |
| 443 | boolean (*sym_is_global) PARAMS ((bfd *, struct internal_syment *)); |
| 444 | const char *strings; |
| 445 | boolean default_copy; |
| 446 | bfd_size_type symcount; |
| 447 | struct coff_link_hash_entry **sym_hash; |
| 448 | bfd_size_type symesz; |
| 449 | bfd_byte *esym; |
| 450 | bfd_byte *esym_end; |
| 451 | |
| 452 | sym_is_global = coff_backend_info (abfd)->_bfd_coff_sym_is_global; |
| 453 | strings = NULL; |
| 454 | |
| 455 | if (info->keep_memory) |
| 456 | default_copy = false; |
| 457 | else |
| 458 | default_copy = true; |
| 459 | |
| 460 | symcount = obj_raw_syment_count (abfd); |
| 461 | |
| 462 | /* We keep a list of the linker hash table entries that correspond |
| 463 | to particular symbols. */ |
| 464 | sym_hash = ((struct coff_link_hash_entry **) |
| 465 | bfd_alloc (abfd, |
| 466 | ((size_t) symcount |
| 467 | * sizeof (struct coff_link_hash_entry *)))); |
| 468 | if (sym_hash == NULL && symcount != 0) |
| 469 | { |
| 470 | bfd_set_error (bfd_error_no_memory); |
| 471 | return false; |
| 472 | } |
| 473 | obj_coff_sym_hashes (abfd) = sym_hash; |
| 474 | memset (sym_hash, 0, |
| 475 | (size_t) symcount * sizeof (struct coff_link_hash_entry *)); |
| 476 | |
| 477 | symesz = bfd_coff_symesz (abfd); |
| 478 | BFD_ASSERT (symesz == bfd_coff_auxesz (abfd)); |
| 479 | esym = (bfd_byte *) obj_coff_external_syms (abfd); |
| 480 | esym_end = esym + symcount * symesz; |
| 481 | while (esym < esym_end) |
| 482 | { |
| 483 | struct internal_syment sym; |
| 484 | boolean copy; |
| 485 | |
| 486 | bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym); |
| 487 | |
| 488 | if (sym.n_sclass == C_EXT |
| 489 | || (sym_is_global && (*sym_is_global) (abfd, &sym))) |
| 490 | { |
| 491 | const char *name; |
| 492 | char buf[SYMNMLEN + 1]; |
| 493 | flagword flags; |
| 494 | asection *section; |
| 495 | bfd_vma value; |
| 496 | |
| 497 | /* This symbol is externally visible. */ |
| 498 | |
| 499 | /* FIXME: It's not clear this will work correctly if sizeof |
| 500 | (_n_zeroes) != 4. */ |
| 501 | copy = default_copy; |
| 502 | if (sym._n._n_n._n_zeroes == 0 |
| 503 | && sym._n._n_n._n_offset != 0) |
| 504 | { |
| 505 | BFD_ASSERT (sym._n._n_n._n_offset >= STRING_SIZE_SIZE); |
| 506 | if (strings == NULL) |
| 507 | { |
| 508 | strings = coff_read_string_table (abfd); |
| 509 | if (strings == NULL) |
| 510 | return false; |
| 511 | } |
| 512 | name = strings + sym._n._n_n._n_offset; |
| 513 | } |
| 514 | else |
| 515 | { |
| 516 | memcpy (buf, sym._n._n_name, SYMNMLEN); |
| 517 | buf[SYMNMLEN] = '\0'; |
| 518 | name = buf; |
| 519 | copy = true; |
| 520 | } |
| 521 | |
| 522 | value = sym.n_value; |
| 523 | |
| 524 | if (sym.n_scnum == 0) |
| 525 | { |
| 526 | if (value == 0) |
| 527 | { |
| 528 | flags = 0; |
| 529 | section = bfd_und_section_ptr; |
| 530 | } |
| 531 | else |
| 532 | { |
| 533 | flags = BSF_GLOBAL; |
| 534 | section = bfd_com_section_ptr; |
| 535 | } |
| 536 | } |
| 537 | else |
| 538 | { |
| 539 | flags = BSF_EXPORT | BSF_GLOBAL; |
| 540 | section = coff_section_from_bfd_index (abfd, sym.n_scnum); |
| 541 | value -= section->vma; |
| 542 | } |
| 543 | |
| 544 | if (! (_bfd_generic_link_add_one_symbol |
| 545 | (info, abfd, name, flags, section, value, |
| 546 | (const char *) NULL, copy, false, |
| 547 | (struct bfd_link_hash_entry **) sym_hash))) |
| 548 | return false; |
| 549 | |
| 550 | if (info->hash->creator->flavour == bfd_get_flavour (abfd)) |
| 551 | { |
| 552 | if (((*sym_hash)->class == C_NULL |
| 553 | && (*sym_hash)->type == T_NULL) |
| 554 | || sym.n_scnum != 0 |
| 555 | || (sym.n_value != 0 |
| 556 | && (*sym_hash)->root.type != bfd_link_hash_defined)) |
| 557 | { |
| 558 | (*sym_hash)->class = sym.n_sclass; |
| 559 | (*sym_hash)->type = sym.n_type; |
| 560 | (*sym_hash)->numaux = sym.n_numaux; |
| 561 | (*sym_hash)->auxbfd = abfd; |
| 562 | if (sym.n_numaux != 0) |
| 563 | { |
| 564 | union internal_auxent *alloc; |
| 565 | unsigned int i; |
| 566 | bfd_byte *eaux; |
| 567 | union internal_auxent *iaux; |
| 568 | |
| 569 | alloc = bfd_hash_allocate (&info->hash->table, |
| 570 | (sym.n_numaux |
| 571 | * sizeof (*alloc))); |
| 572 | if (alloc == NULL) |
| 573 | { |
| 574 | bfd_set_error (bfd_error_no_memory); |
| 575 | return false; |
| 576 | } |
| 577 | for (i = 0, eaux = esym + symesz, iaux = alloc; |
| 578 | i < sym.n_numaux; |
| 579 | i++, eaux += symesz, iaux++) |
| 580 | bfd_coff_swap_aux_in (abfd, (PTR) eaux, sym.n_type, |
| 581 | sym.n_sclass, i, sym.n_numaux, |
| 582 | (PTR) iaux); |
| 583 | (*sym_hash)->aux = alloc; |
| 584 | } |
| 585 | } |
| 586 | } |
| 587 | } |
| 588 | |
| 589 | esym += (sym.n_numaux + 1) * symesz; |
| 590 | sym_hash += sym.n_numaux + 1; |
| 591 | } |
| 592 | |
| 593 | return true; |
| 594 | } |
| 595 | |
| 596 | /* Do the final link step. */ |
| 597 | |
| 598 | boolean |
| 599 | _bfd_coff_final_link (abfd, info) |
| 600 | bfd *abfd; |
| 601 | struct bfd_link_info *info; |
| 602 | { |
| 603 | bfd_size_type symesz; |
| 604 | struct coff_final_link_info finfo; |
| 605 | asection *o; |
| 606 | struct bfd_link_order *p; |
| 607 | size_t max_contents_size; |
| 608 | size_t max_sym_count; |
| 609 | size_t max_lineno_count; |
| 610 | size_t max_reloc_count; |
| 611 | size_t max_output_reloc_count; |
| 612 | file_ptr rel_filepos; |
| 613 | unsigned int relsz; |
| 614 | file_ptr line_filepos; |
| 615 | unsigned int linesz; |
| 616 | bfd *sub; |
| 617 | bfd_byte *external_relocs = NULL; |
| 618 | char strbuf[STRING_SIZE_SIZE]; |
| 619 | |
| 620 | symesz = bfd_coff_symesz (abfd); |
| 621 | |
| 622 | finfo.info = info; |
| 623 | finfo.output_bfd = abfd; |
| 624 | finfo.strtab = NULL; |
| 625 | finfo.section_info = NULL; |
| 626 | finfo.last_file_index = -1; |
| 627 | finfo.internal_syms = NULL; |
| 628 | finfo.sec_ptrs = NULL; |
| 629 | finfo.sym_indices = NULL; |
| 630 | finfo.outsyms = NULL; |
| 631 | finfo.linenos = NULL; |
| 632 | finfo.contents = NULL; |
| 633 | finfo.external_relocs = NULL; |
| 634 | finfo.internal_relocs = NULL; |
| 635 | |
| 636 | finfo.strtab = _bfd_stringtab_init (); |
| 637 | if (finfo.strtab == NULL) |
| 638 | goto error_return; |
| 639 | |
| 640 | /* Compute the file positions for all the sections. */ |
| 641 | if (! abfd->output_has_begun) |
| 642 | bfd_coff_compute_section_file_positions (abfd); |
| 643 | |
| 644 | /* Count the line numbers and relocation entries required for the |
| 645 | output file. Set the file positions for the relocs. */ |
| 646 | rel_filepos = obj_relocbase (abfd); |
| 647 | relsz = bfd_coff_relsz (abfd); |
| 648 | max_contents_size = 0; |
| 649 | max_lineno_count = 0; |
| 650 | max_reloc_count = 0; |
| 651 | for (o = abfd->sections; o != NULL; o = o->next) |
| 652 | { |
| 653 | o->reloc_count = 0; |
| 654 | o->lineno_count = 0; |
| 655 | for (p = o->link_order_head; p != NULL; p = p->next) |
| 656 | { |
| 657 | if (p->type == bfd_indirect_link_order) |
| 658 | { |
| 659 | asection *sec; |
| 660 | |
| 661 | sec = p->u.indirect.section; |
| 662 | |
| 663 | if (info->strip == strip_none |
| 664 | || info->strip == strip_some) |
| 665 | o->lineno_count += sec->lineno_count; |
| 666 | |
| 667 | if (info->relocateable) |
| 668 | o->reloc_count += sec->reloc_count; |
| 669 | |
| 670 | if (sec->_raw_size > max_contents_size) |
| 671 | max_contents_size = sec->_raw_size; |
| 672 | if (sec->lineno_count > max_lineno_count) |
| 673 | max_lineno_count = sec->lineno_count; |
| 674 | if (sec->reloc_count > max_reloc_count) |
| 675 | max_reloc_count = sec->reloc_count; |
| 676 | } |
| 677 | else if (info->relocateable |
| 678 | && (p->type == bfd_section_reloc_link_order |
| 679 | || p->type == bfd_symbol_reloc_link_order)) |
| 680 | ++o->reloc_count; |
| 681 | } |
| 682 | if (o->reloc_count == 0) |
| 683 | o->rel_filepos = 0; |
| 684 | else |
| 685 | { |
| 686 | o->flags |= SEC_RELOC; |
| 687 | o->rel_filepos = rel_filepos; |
| 688 | rel_filepos += o->reloc_count * relsz; |
| 689 | } |
| 690 | } |
| 691 | |
| 692 | /* If doing a relocateable link, allocate space for the pointers we |
| 693 | need to keep. */ |
| 694 | if (info->relocateable) |
| 695 | { |
| 696 | unsigned int i; |
| 697 | |
| 698 | /* We use section_count + 1, rather than section_count, because |
| 699 | the target_index fields are 1 based. */ |
| 700 | finfo.section_info = ((struct coff_link_section_info *) |
| 701 | malloc ((abfd->section_count + 1) |
| 702 | * sizeof (struct coff_link_section_info))); |
| 703 | if (finfo.section_info == NULL) |
| 704 | { |
| 705 | bfd_set_error (bfd_error_no_memory); |
| 706 | goto error_return; |
| 707 | } |
| 708 | for (i = 0; i <= abfd->section_count; i++) |
| 709 | { |
| 710 | finfo.section_info[i].relocs = NULL; |
| 711 | finfo.section_info[i].rel_hashes = NULL; |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | /* We now know the size of the relocs, so we can determine the file |
| 716 | positions of the line numbers. */ |
| 717 | line_filepos = rel_filepos; |
| 718 | linesz = bfd_coff_linesz (abfd); |
| 719 | max_output_reloc_count = 0; |
| 720 | for (o = abfd->sections; o != NULL; o = o->next) |
| 721 | { |
| 722 | if (o->lineno_count == 0) |
| 723 | o->line_filepos = 0; |
| 724 | else |
| 725 | { |
| 726 | o->line_filepos = line_filepos; |
| 727 | line_filepos += o->lineno_count * linesz; |
| 728 | } |
| 729 | |
| 730 | if (o->reloc_count != 0) |
| 731 | { |
| 732 | /* We don't know the indices of global symbols until we have |
| 733 | written out all the local symbols. For each section in |
| 734 | the output file, we keep an array of pointers to hash |
| 735 | table entries. Each entry in the array corresponds to a |
| 736 | reloc. When we find a reloc against a global symbol, we |
| 737 | set the corresponding entry in this array so that we can |
| 738 | fix up the symbol index after we have written out all the |
| 739 | local symbols. |
| 740 | |
| 741 | Because of this problem, we also keep the relocs in |
| 742 | memory until the end of the link. This wastes memory, |
| 743 | but only when doing a relocateable link, which is not the |
| 744 | common case. */ |
| 745 | BFD_ASSERT (info->relocateable); |
| 746 | finfo.section_info[o->target_index].relocs = |
| 747 | ((struct internal_reloc *) |
| 748 | malloc (o->reloc_count * sizeof (struct internal_reloc))); |
| 749 | finfo.section_info[o->target_index].rel_hashes = |
| 750 | ((struct coff_link_hash_entry **) |
| 751 | malloc (o->reloc_count |
| 752 | * sizeof (struct coff_link_hash_entry *))); |
| 753 | if (finfo.section_info[o->target_index].relocs == NULL |
| 754 | || finfo.section_info[o->target_index].rel_hashes == NULL) |
| 755 | { |
| 756 | bfd_set_error (bfd_error_no_memory); |
| 757 | goto error_return; |
| 758 | } |
| 759 | |
| 760 | if (o->reloc_count > max_output_reloc_count) |
| 761 | max_output_reloc_count = o->reloc_count; |
| 762 | } |
| 763 | |
| 764 | /* Reset the reloc and lineno counts, so that we can use them to |
| 765 | count the number of entries we have output so far. */ |
| 766 | o->reloc_count = 0; |
| 767 | o->lineno_count = 0; |
| 768 | } |
| 769 | |
| 770 | obj_sym_filepos (abfd) = line_filepos; |
| 771 | |
| 772 | /* Figure out the largest number of symbols in an input BFD. Take |
| 773 | the opportunity to clear the output_has_begun fields of all the |
| 774 | input BFD's. */ |
| 775 | max_sym_count = 0; |
| 776 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) |
| 777 | { |
| 778 | size_t sz; |
| 779 | |
| 780 | sub->output_has_begun = false; |
| 781 | sz = obj_raw_syment_count (sub); |
| 782 | if (sz > max_sym_count) |
| 783 | max_sym_count = sz; |
| 784 | } |
| 785 | |
| 786 | /* Allocate some buffers used while linking. */ |
| 787 | finfo.internal_syms = ((struct internal_syment *) |
| 788 | malloc (max_sym_count |
| 789 | * sizeof (struct internal_syment))); |
| 790 | finfo.sec_ptrs = (asection **) malloc (max_sym_count * sizeof (asection *)); |
| 791 | finfo.sym_indices = (long *) malloc (max_sym_count * sizeof (long)); |
| 792 | finfo.outsyms = (bfd_byte *) malloc ((max_sym_count + 1) * symesz); |
| 793 | finfo.linenos = (bfd_byte *) malloc (max_lineno_count |
| 794 | * bfd_coff_linesz (abfd)); |
| 795 | finfo.contents = (bfd_byte *) malloc (max_contents_size); |
| 796 | finfo.external_relocs = (bfd_byte *) malloc (max_reloc_count * relsz); |
| 797 | if (! info->relocateable) |
| 798 | finfo.internal_relocs = ((struct internal_reloc *) |
| 799 | malloc (max_reloc_count |
| 800 | * sizeof (struct internal_reloc))); |
| 801 | if ((finfo.internal_syms == NULL && max_sym_count > 0) |
| 802 | || (finfo.sec_ptrs == NULL && max_sym_count > 0) |
| 803 | || (finfo.sym_indices == NULL && max_sym_count > 0) |
| 804 | || finfo.outsyms == NULL |
| 805 | || (finfo.linenos == NULL && max_lineno_count > 0) |
| 806 | || (finfo.contents == NULL && max_contents_size > 0) |
| 807 | || (finfo.external_relocs == NULL && max_reloc_count > 0) |
| 808 | || (! info->relocateable |
| 809 | && finfo.internal_relocs == NULL |
| 810 | && max_reloc_count > 0)) |
| 811 | { |
| 812 | bfd_set_error (bfd_error_no_memory); |
| 813 | goto error_return; |
| 814 | } |
| 815 | |
| 816 | /* We now know the position of everything in the file, except that |
| 817 | we don't know the size of the symbol table and therefore we don't |
| 818 | know where the string table starts. We just build the string |
| 819 | table in memory as we go along. We process all the relocations |
| 820 | for a single input file at once. */ |
| 821 | obj_raw_syment_count (abfd) = 0; |
| 822 | for (o = abfd->sections; o != NULL; o = o->next) |
| 823 | { |
| 824 | for (p = o->link_order_head; p != NULL; p = p->next) |
| 825 | { |
| 826 | if (p->type == bfd_indirect_link_order |
| 827 | && (bfd_get_flavour (p->u.indirect.section->owner) |
| 828 | == bfd_target_coff_flavour)) |
| 829 | { |
| 830 | sub = p->u.indirect.section->owner; |
| 831 | if (! sub->output_has_begun) |
| 832 | { |
| 833 | if (! coff_link_input_bfd (&finfo, sub)) |
| 834 | goto error_return; |
| 835 | sub->output_has_begun = true; |
| 836 | } |
| 837 | } |
| 838 | else if (p->type == bfd_section_reloc_link_order |
| 839 | || p->type == bfd_symbol_reloc_link_order) |
| 840 | { |
| 841 | if (! coff_reloc_link_order (abfd, &finfo, o, p)) |
| 842 | goto error_return; |
| 843 | } |
| 844 | else |
| 845 | { |
| 846 | if (! _bfd_default_link_order (abfd, info, o, p)) |
| 847 | goto error_return; |
| 848 | } |
| 849 | } |
| 850 | } |
| 851 | |
| 852 | /* Free up the buffers used by coff_link_input_bfd. */ |
| 853 | if (finfo.internal_syms != NULL) |
| 854 | { |
| 855 | free (finfo.internal_syms); |
| 856 | finfo.internal_syms = NULL; |
| 857 | } |
| 858 | if (finfo.sec_ptrs != NULL) |
| 859 | { |
| 860 | free (finfo.sec_ptrs); |
| 861 | finfo.sec_ptrs = NULL; |
| 862 | } |
| 863 | if (finfo.sym_indices != NULL) |
| 864 | { |
| 865 | free (finfo.sym_indices); |
| 866 | finfo.sym_indices = NULL; |
| 867 | } |
| 868 | if (finfo.linenos != NULL) |
| 869 | { |
| 870 | free (finfo.linenos); |
| 871 | finfo.linenos = NULL; |
| 872 | } |
| 873 | if (finfo.contents != NULL) |
| 874 | { |
| 875 | free (finfo.contents); |
| 876 | finfo.contents = NULL; |
| 877 | } |
| 878 | if (finfo.external_relocs != NULL) |
| 879 | { |
| 880 | free (finfo.external_relocs); |
| 881 | finfo.external_relocs = NULL; |
| 882 | } |
| 883 | if (finfo.internal_relocs != NULL) |
| 884 | { |
| 885 | free (finfo.internal_relocs); |
| 886 | finfo.internal_relocs = NULL; |
| 887 | } |
| 888 | |
| 889 | /* The value of the last C_FILE symbol is supposed to be the symbol |
| 890 | index of the first external symbol. Write it out again if |
| 891 | necessary. */ |
| 892 | if (finfo.last_file_index != -1 |
| 893 | && finfo.last_file.n_value != obj_raw_syment_count (abfd)) |
| 894 | { |
| 895 | finfo.last_file.n_value = obj_raw_syment_count (abfd); |
| 896 | bfd_coff_swap_sym_out (abfd, (PTR) &finfo.last_file, |
| 897 | (PTR) finfo.outsyms); |
| 898 | if (bfd_seek (abfd, |
| 899 | (obj_sym_filepos (abfd) |
| 900 | + finfo.last_file_index * symesz), |
| 901 | SEEK_SET) != 0 |
| 902 | || bfd_write (finfo.outsyms, symesz, 1, abfd) != symesz) |
| 903 | return false; |
| 904 | } |
| 905 | |
| 906 | /* Write out the global symbols. */ |
| 907 | finfo.failed = false; |
| 908 | coff_link_hash_traverse (coff_hash_table (info), coff_write_global_sym, |
| 909 | (PTR) &finfo); |
| 910 | if (finfo.failed) |
| 911 | goto error_return; |
| 912 | |
| 913 | /* The outsyms buffer is used by coff_write_global_sym. */ |
| 914 | if (finfo.outsyms != NULL) |
| 915 | { |
| 916 | free (finfo.outsyms); |
| 917 | finfo.outsyms = NULL; |
| 918 | } |
| 919 | |
| 920 | if (info->relocateable) |
| 921 | { |
| 922 | /* Now that we have written out all the global symbols, we know |
| 923 | the symbol indices to use for relocs against them, and we can |
| 924 | finally write out the relocs. */ |
| 925 | external_relocs = (bfd_byte *) malloc (max_output_reloc_count * relsz); |
| 926 | if (external_relocs == NULL) |
| 927 | { |
| 928 | bfd_set_error (bfd_error_no_memory); |
| 929 | goto error_return; |
| 930 | } |
| 931 | |
| 932 | for (o = abfd->sections; o != NULL; o = o->next) |
| 933 | { |
| 934 | struct internal_reloc *irel; |
| 935 | struct internal_reloc *irelend; |
| 936 | struct coff_link_hash_entry **rel_hash; |
| 937 | bfd_byte *erel; |
| 938 | |
| 939 | if (o->reloc_count == 0) |
| 940 | continue; |
| 941 | |
| 942 | irel = finfo.section_info[o->target_index].relocs; |
| 943 | irelend = irel + o->reloc_count; |
| 944 | rel_hash = finfo.section_info[o->target_index].rel_hashes; |
| 945 | erel = external_relocs; |
| 946 | for (; irel < irelend; irel++, rel_hash++, erel += relsz) |
| 947 | { |
| 948 | if (*rel_hash != NULL) |
| 949 | { |
| 950 | BFD_ASSERT ((*rel_hash)->indx >= 0); |
| 951 | irel->r_symndx = (*rel_hash)->indx; |
| 952 | } |
| 953 | bfd_coff_swap_reloc_out (abfd, (PTR) irel, (PTR) erel); |
| 954 | } |
| 955 | |
| 956 | if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0 |
| 957 | || bfd_write ((PTR) external_relocs, relsz, o->reloc_count, |
| 958 | abfd) != relsz * o->reloc_count) |
| 959 | goto error_return; |
| 960 | } |
| 961 | |
| 962 | free (external_relocs); |
| 963 | external_relocs = NULL; |
| 964 | } |
| 965 | |
| 966 | /* Free up the section information. */ |
| 967 | if (finfo.section_info != NULL) |
| 968 | { |
| 969 | unsigned int i; |
| 970 | |
| 971 | for (i = 0; i < abfd->section_count; i++) |
| 972 | { |
| 973 | if (finfo.section_info[i].relocs != NULL) |
| 974 | free (finfo.section_info[i].relocs); |
| 975 | if (finfo.section_info[i].rel_hashes != NULL) |
| 976 | free (finfo.section_info[i].rel_hashes); |
| 977 | } |
| 978 | free (finfo.section_info); |
| 979 | finfo.section_info = NULL; |
| 980 | } |
| 981 | |
| 982 | /* Write out the string table. */ |
| 983 | if (bfd_seek (abfd, |
| 984 | (obj_sym_filepos (abfd) |
| 985 | + obj_raw_syment_count (abfd) * symesz), |
| 986 | SEEK_SET) != 0) |
| 987 | return false; |
| 988 | |
| 989 | #if STRING_SIZE_SIZE == 4 |
| 990 | bfd_h_put_32 (abfd, |
| 991 | _bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE, |
| 992 | strbuf); |
| 993 | #else |
| 994 | #error Change bfd_h_put_32 |
| 995 | #endif |
| 996 | |
| 997 | if (bfd_write (strbuf, 1, STRING_SIZE_SIZE, abfd) != STRING_SIZE_SIZE) |
| 998 | return false; |
| 999 | |
| 1000 | if (! _bfd_stringtab_emit (abfd, finfo.strtab)) |
| 1001 | return false; |
| 1002 | |
| 1003 | _bfd_stringtab_free (finfo.strtab); |
| 1004 | |
| 1005 | /* Setting bfd_get_symcount to 0 will cause write_object_contents to |
| 1006 | not try to write out the symbols. */ |
| 1007 | bfd_get_symcount (abfd) = 0; |
| 1008 | |
| 1009 | return true; |
| 1010 | |
| 1011 | error_return: |
| 1012 | if (finfo.strtab != NULL) |
| 1013 | _bfd_stringtab_free (finfo.strtab); |
| 1014 | if (finfo.section_info != NULL) |
| 1015 | { |
| 1016 | unsigned int i; |
| 1017 | |
| 1018 | for (i = 0; i < abfd->section_count; i++) |
| 1019 | { |
| 1020 | if (finfo.section_info[i].relocs != NULL) |
| 1021 | free (finfo.section_info[i].relocs); |
| 1022 | if (finfo.section_info[i].rel_hashes != NULL) |
| 1023 | free (finfo.section_info[i].rel_hashes); |
| 1024 | } |
| 1025 | free (finfo.section_info); |
| 1026 | } |
| 1027 | if (finfo.internal_syms != NULL) |
| 1028 | free (finfo.internal_syms); |
| 1029 | if (finfo.sec_ptrs != NULL) |
| 1030 | free (finfo.sec_ptrs); |
| 1031 | if (finfo.sym_indices != NULL) |
| 1032 | free (finfo.sym_indices); |
| 1033 | if (finfo.outsyms != NULL) |
| 1034 | free (finfo.outsyms); |
| 1035 | if (finfo.linenos != NULL) |
| 1036 | free (finfo.linenos); |
| 1037 | if (finfo.contents != NULL) |
| 1038 | free (finfo.contents); |
| 1039 | if (finfo.external_relocs != NULL) |
| 1040 | free (finfo.external_relocs); |
| 1041 | if (finfo.internal_relocs != NULL) |
| 1042 | free (finfo.internal_relocs); |
| 1043 | if (external_relocs != NULL) |
| 1044 | free (external_relocs); |
| 1045 | return false; |
| 1046 | } |
| 1047 | |
| 1048 | /* Link an input file into the linker output file. This function |
| 1049 | handles all the sections and relocations of the input file at once. */ |
| 1050 | |
| 1051 | static boolean |
| 1052 | coff_link_input_bfd (finfo, input_bfd) |
| 1053 | struct coff_final_link_info *finfo; |
| 1054 | bfd *input_bfd; |
| 1055 | { |
| 1056 | boolean (*sym_is_global) PARAMS ((bfd *, struct internal_syment *)); |
| 1057 | bfd *output_bfd; |
| 1058 | const char *strings; |
| 1059 | bfd_size_type syment_base; |
| 1060 | unsigned int n_tmask; |
| 1061 | unsigned int n_btshft; |
| 1062 | boolean copy, hash; |
| 1063 | bfd_size_type isymesz; |
| 1064 | bfd_size_type osymesz; |
| 1065 | bfd_size_type linesz; |
| 1066 | bfd_byte *esym; |
| 1067 | bfd_byte *esym_end; |
| 1068 | struct internal_syment *isymp; |
| 1069 | asection **secpp; |
| 1070 | long *indexp; |
| 1071 | long output_index; |
| 1072 | bfd_byte *outsym; |
| 1073 | struct coff_link_hash_entry **sym_hash; |
| 1074 | bfd_size_type relsz; |
| 1075 | asection *o; |
| 1076 | |
| 1077 | /* Move all the symbols to the output file. */ |
| 1078 | |
| 1079 | output_bfd = finfo->output_bfd; |
| 1080 | sym_is_global = coff_backend_info (input_bfd)->_bfd_coff_sym_is_global; |
| 1081 | strings = NULL; |
| 1082 | syment_base = obj_raw_syment_count (output_bfd); |
| 1083 | isymesz = bfd_coff_symesz (input_bfd); |
| 1084 | osymesz = bfd_coff_symesz (output_bfd); |
| 1085 | linesz = bfd_coff_linesz (input_bfd); |
| 1086 | BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd)); |
| 1087 | |
| 1088 | n_tmask = coff_data (input_bfd)->local_n_tmask; |
| 1089 | n_btshft = coff_data (input_bfd)->local_n_btshft; |
| 1090 | |
| 1091 | /* Define macros so that ISFCN, et. al., macros work correctly. */ |
| 1092 | #define N_TMASK n_tmask |
| 1093 | #define N_BTSHFT n_btshft |
| 1094 | |
| 1095 | copy = false; |
| 1096 | if (! finfo->info->keep_memory) |
| 1097 | copy = true; |
| 1098 | hash = true; |
| 1099 | if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0) |
| 1100 | hash = false; |
| 1101 | |
| 1102 | if (! coff_link_get_symbols (input_bfd)) |
| 1103 | return false; |
| 1104 | |
| 1105 | esym = (bfd_byte *) obj_coff_external_syms (input_bfd); |
| 1106 | esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz; |
| 1107 | isymp = finfo->internal_syms; |
| 1108 | secpp = finfo->sec_ptrs; |
| 1109 | indexp = finfo->sym_indices; |
| 1110 | output_index = syment_base; |
| 1111 | outsym = finfo->outsyms; |
| 1112 | while (esym < esym_end) |
| 1113 | { |
| 1114 | struct internal_syment isym; |
| 1115 | boolean skip; |
| 1116 | boolean global; |
| 1117 | int add; |
| 1118 | |
| 1119 | bfd_coff_swap_sym_in (input_bfd, (PTR) esym, (PTR) isymp); |
| 1120 | |
| 1121 | /* Make a copy of *isymp so that the relocate_section function |
| 1122 | always sees the original values. This is more reliable than |
| 1123 | always recomputing the symbol value even if we are stripping |
| 1124 | the symbol. */ |
| 1125 | isym = *isymp; |
| 1126 | |
| 1127 | if (isym.n_scnum != 0) |
| 1128 | *secpp = coff_section_from_bfd_index (input_bfd, isym.n_scnum); |
| 1129 | else |
| 1130 | { |
| 1131 | if (isym.n_value == 0) |
| 1132 | *secpp = bfd_und_section_ptr; |
| 1133 | else |
| 1134 | *secpp = bfd_com_section_ptr; |
| 1135 | } |
| 1136 | |
| 1137 | *indexp = -1; |
| 1138 | |
| 1139 | skip = false; |
| 1140 | global = false; |
| 1141 | add = 1 + isym.n_numaux; |
| 1142 | |
| 1143 | /* If we are stripping all symbols, we want to skip this one. */ |
| 1144 | if (finfo->info->strip == strip_all) |
| 1145 | skip = true; |
| 1146 | |
| 1147 | if (! skip) |
| 1148 | { |
| 1149 | if (isym.n_sclass == C_EXT |
| 1150 | || (sym_is_global && (*sym_is_global) (input_bfd, &isym))) |
| 1151 | { |
| 1152 | /* This is a global symbol. Global symbols come at the |
| 1153 | end of the symbol table, so skip them for now. |
| 1154 | Function symbols, however, are an exception, and are |
| 1155 | not moved to the end. */ |
| 1156 | global = true; |
| 1157 | if (! ISFCN (isym.n_type)) |
| 1158 | skip = true; |
| 1159 | } |
| 1160 | else |
| 1161 | { |
| 1162 | /* This is a local symbol. Skip it if we are discarding |
| 1163 | local symbols. */ |
| 1164 | if (finfo->info->discard == discard_all) |
| 1165 | skip = true; |
| 1166 | } |
| 1167 | } |
| 1168 | |
| 1169 | /* If we stripping debugging symbols, and this is a debugging |
| 1170 | symbol, then skip it. */ |
| 1171 | if (! skip |
| 1172 | && finfo->info->strip == strip_debugger |
| 1173 | && isym.n_scnum == N_DEBUG) |
| 1174 | skip = true; |
| 1175 | |
| 1176 | /* If some symbols are stripped based on the name, work out the |
| 1177 | name and decide whether to skip this symbol. */ |
| 1178 | if (! skip |
| 1179 | && (finfo->info->strip == strip_some |
| 1180 | || finfo->info->discard == discard_l)) |
| 1181 | { |
| 1182 | const char *name; |
| 1183 | char buf[SYMNMLEN + 1]; |
| 1184 | |
| 1185 | if (isym._n._n_n._n_zeroes == 0 |
| 1186 | && isym._n._n_n._n_offset != 0) |
| 1187 | { |
| 1188 | if (strings == NULL) |
| 1189 | { |
| 1190 | strings = coff_read_string_table (input_bfd); |
| 1191 | if (strings == NULL) |
| 1192 | return false; |
| 1193 | } |
| 1194 | name = strings + isym._n._n_n._n_offset; |
| 1195 | } |
| 1196 | else |
| 1197 | { |
| 1198 | memcpy (buf, isym._n._n_name, SYMNMLEN); |
| 1199 | buf[SYMNMLEN] = '\0'; |
| 1200 | name = buf; |
| 1201 | } |
| 1202 | |
| 1203 | if ((finfo->info->strip == strip_some |
| 1204 | && (bfd_hash_lookup (finfo->info->keep_hash, name, false, |
| 1205 | false) == NULL)) |
| 1206 | || (! global |
| 1207 | && finfo->info->discard == discard_l |
| 1208 | && strncmp (name, finfo->info->lprefix, |
| 1209 | finfo->info->lprefix_len) == 0)) |
| 1210 | skip = true; |
| 1211 | } |
| 1212 | |
| 1213 | /* We now know whether we are to skip this symbol or not. */ |
| 1214 | if (! skip) |
| 1215 | { |
| 1216 | /* Adjust the symbol in order to output it. */ |
| 1217 | |
| 1218 | if (isym._n._n_n._n_zeroes == 0 |
| 1219 | && isym._n._n_n._n_offset != 0) |
| 1220 | { |
| 1221 | const char *name; |
| 1222 | bfd_size_type indx; |
| 1223 | |
| 1224 | /* This symbol has a long name. Enter it in the string |
| 1225 | table we are building. Note that we do not check |
| 1226 | bfd_coff_symname_in_debug. That is only true for |
| 1227 | XCOFF, and XCOFF requires different linking code |
| 1228 | anyhow. */ |
| 1229 | BFD_ASSERT (isym._n._n_n._n_offset >= STRING_SIZE_SIZE); |
| 1230 | if (strings == NULL) |
| 1231 | { |
| 1232 | strings = coff_read_string_table (input_bfd); |
| 1233 | if (strings == NULL) |
| 1234 | return false; |
| 1235 | } |
| 1236 | name = strings + isym._n._n_n._n_offset; |
| 1237 | indx = _bfd_stringtab_add (finfo->strtab, name, hash, copy); |
| 1238 | if (indx == (bfd_size_type) -1) |
| 1239 | return false; |
| 1240 | isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; |
| 1241 | } |
| 1242 | |
| 1243 | if (isym.n_scnum > 0) |
| 1244 | { |
| 1245 | isym.n_scnum = (*secpp)->output_section->target_index; |
| 1246 | isym.n_value += ((*secpp)->output_section->vma |
| 1247 | + (*secpp)->output_offset |
| 1248 | - (*secpp)->vma); |
| 1249 | } |
| 1250 | |
| 1251 | /* The value of a C_FILE symbol is the symbol index of the |
| 1252 | next C_FILE symbol. The value of the last C_FILE symbol |
| 1253 | is the symbol index to the first external symbol |
| 1254 | (actually, coff_renumber_symbols does not get this |
| 1255 | right--it just sets the value of the last C_FILE symbol |
| 1256 | to zero--and nobody has ever complained about it). We |
| 1257 | try to get this right, below, just before we write the |
| 1258 | symbols out, but in the general case we may have to write |
| 1259 | the symbol out twice. */ |
| 1260 | if (isym.n_sclass == C_FILE) |
| 1261 | { |
| 1262 | if (finfo->last_file_index != -1 |
| 1263 | && finfo->last_file.n_value != output_index) |
| 1264 | { |
| 1265 | /* We must correct the value of the last C_FILE entry. */ |
| 1266 | finfo->last_file.n_value = output_index; |
| 1267 | if (finfo->last_file_index >= syment_base) |
| 1268 | { |
| 1269 | /* The last C_FILE symbol is in this input file. */ |
| 1270 | bfd_coff_swap_sym_out (output_bfd, |
| 1271 | (PTR) &finfo->last_file, |
| 1272 | (PTR) (finfo->outsyms |
| 1273 | + ((finfo->last_file_index |
| 1274 | - syment_base) |
| 1275 | * osymesz))); |
| 1276 | } |
| 1277 | else |
| 1278 | { |
| 1279 | /* We have already written out the last C_FILE |
| 1280 | symbol. We need to write it out again. We |
| 1281 | borrow *outsym temporarily. */ |
| 1282 | bfd_coff_swap_sym_out (output_bfd, |
| 1283 | (PTR) &finfo->last_file, |
| 1284 | (PTR) outsym); |
| 1285 | if (bfd_seek (output_bfd, |
| 1286 | (obj_sym_filepos (output_bfd) |
| 1287 | + finfo->last_file_index * osymesz), |
| 1288 | SEEK_SET) != 0 |
| 1289 | || (bfd_write (outsym, osymesz, 1, output_bfd) |
| 1290 | != osymesz)) |
| 1291 | return false; |
| 1292 | } |
| 1293 | } |
| 1294 | |
| 1295 | finfo->last_file_index = output_index; |
| 1296 | finfo->last_file = isym; |
| 1297 | } |
| 1298 | |
| 1299 | /* Output the symbol. */ |
| 1300 | |
| 1301 | bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym); |
| 1302 | |
| 1303 | *indexp = output_index; |
| 1304 | |
| 1305 | if (global) |
| 1306 | { |
| 1307 | long indx; |
| 1308 | struct coff_link_hash_entry *h; |
| 1309 | |
| 1310 | indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd)) |
| 1311 | / isymesz); |
| 1312 | h = obj_coff_sym_hashes (input_bfd)[indx]; |
| 1313 | BFD_ASSERT (h != NULL); |
| 1314 | h->indx = output_index; |
| 1315 | } |
| 1316 | |
| 1317 | output_index += add; |
| 1318 | outsym += add * osymesz; |
| 1319 | } |
| 1320 | |
| 1321 | esym += add * isymesz; |
| 1322 | isymp += add; |
| 1323 | ++secpp; |
| 1324 | ++indexp; |
| 1325 | for (--add; add > 0; --add) |
| 1326 | { |
| 1327 | *secpp++ = NULL; |
| 1328 | *indexp++ = -1; |
| 1329 | } |
| 1330 | } |
| 1331 | |
| 1332 | /* Fix up the aux entries. This must be done in a separate pass, |
| 1333 | because we don't know the correct symbol indices until we have |
| 1334 | already decided which symbols we are going to keep. */ |
| 1335 | |
| 1336 | esym = (bfd_byte *) obj_coff_external_syms (input_bfd); |
| 1337 | esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz; |
| 1338 | isymp = finfo->internal_syms; |
| 1339 | indexp = finfo->sym_indices; |
| 1340 | sym_hash = obj_coff_sym_hashes (input_bfd); |
| 1341 | outsym = finfo->outsyms; |
| 1342 | while (esym < esym_end) |
| 1343 | { |
| 1344 | int add; |
| 1345 | |
| 1346 | add = 1 + isymp->n_numaux; |
| 1347 | |
| 1348 | if (*indexp < 0 |
| 1349 | && (*sym_hash == NULL |
| 1350 | || (*sym_hash)->auxbfd != input_bfd)) |
| 1351 | esym += add * isymesz; |
| 1352 | else |
| 1353 | { |
| 1354 | struct coff_link_hash_entry *h; |
| 1355 | int i; |
| 1356 | |
| 1357 | h = NULL; |
| 1358 | if (*indexp < 0) |
| 1359 | { |
| 1360 | h = *sym_hash; |
| 1361 | BFD_ASSERT (h->numaux == isymp->n_numaux); |
| 1362 | } |
| 1363 | |
| 1364 | esym += isymesz; |
| 1365 | |
| 1366 | if (h == NULL) |
| 1367 | outsym += osymesz; |
| 1368 | |
| 1369 | /* Handle the aux entries. This handling is based on |
| 1370 | coff_pointerize_aux. I don't know if it always correct. */ |
| 1371 | for (i = 0; i < isymp->n_numaux && esym < esym_end; i++) |
| 1372 | { |
| 1373 | union internal_auxent aux; |
| 1374 | union internal_auxent *auxp; |
| 1375 | |
| 1376 | if (h != NULL) |
| 1377 | auxp = h->aux + i; |
| 1378 | else |
| 1379 | { |
| 1380 | bfd_coff_swap_aux_in (input_bfd, (PTR) esym, isymp->n_type, |
| 1381 | isymp->n_sclass, i, isymp->n_numaux, |
| 1382 | (PTR) &aux); |
| 1383 | auxp = &aux; |
| 1384 | } |
| 1385 | |
| 1386 | if (isymp->n_sclass == C_FILE) |
| 1387 | { |
| 1388 | /* If this is a long filename, we must put it in the |
| 1389 | string table. */ |
| 1390 | if (auxp->x_file.x_n.x_zeroes == 0) |
| 1391 | { |
| 1392 | const char *filename; |
| 1393 | bfd_size_type indx; |
| 1394 | |
| 1395 | BFD_ASSERT (auxp->x_file.x_n.x_offset |
| 1396 | >= STRING_SIZE_SIZE); |
| 1397 | if (strings == NULL) |
| 1398 | { |
| 1399 | strings = coff_read_string_table (input_bfd); |
| 1400 | if (strings == NULL) |
| 1401 | return false; |
| 1402 | } |
| 1403 | filename = strings + auxp->x_file.x_n.x_offset; |
| 1404 | indx = _bfd_stringtab_add (finfo->strtab, filename, |
| 1405 | hash, copy); |
| 1406 | if (indx == (bfd_size_type) -1) |
| 1407 | return false; |
| 1408 | auxp->x_file.x_n.x_offset = STRING_SIZE_SIZE + indx; |
| 1409 | } |
| 1410 | } |
| 1411 | else if (isymp->n_sclass != C_STAT || isymp->n_type != T_NULL) |
| 1412 | { |
| 1413 | long indx; |
| 1414 | |
| 1415 | if (ISFCN (isymp->n_type) |
| 1416 | || ISTAG (isymp->n_sclass) |
| 1417 | || isymp->n_sclass == C_BLOCK) |
| 1418 | { |
| 1419 | indx = auxp->x_sym.x_fcnary.x_fcn.x_endndx.l; |
| 1420 | if (indx > 0 |
| 1421 | && indx < obj_raw_syment_count (input_bfd)) |
| 1422 | { |
| 1423 | /* We look forward through the symbol for |
| 1424 | the index of the next symbol we are going |
| 1425 | to include. I don't know if this is |
| 1426 | entirely right. */ |
| 1427 | while (finfo->sym_indices[indx] < 0 |
| 1428 | && indx < obj_raw_syment_count (input_bfd)) |
| 1429 | ++indx; |
| 1430 | if (indx >= obj_raw_syment_count (input_bfd)) |
| 1431 | indx = output_index; |
| 1432 | else |
| 1433 | indx = finfo->sym_indices[indx]; |
| 1434 | auxp->x_sym.x_fcnary.x_fcn.x_endndx.l = indx; |
| 1435 | } |
| 1436 | } |
| 1437 | |
| 1438 | indx = auxp->x_sym.x_tagndx.l; |
| 1439 | if (indx > 0 && indx < obj_raw_syment_count (input_bfd)) |
| 1440 | { |
| 1441 | indx = finfo->sym_indices[indx]; |
| 1442 | if (indx < 0) |
| 1443 | auxp->x_sym.x_tagndx.l = 0; |
| 1444 | else |
| 1445 | auxp->x_sym.x_tagndx.l = indx; |
| 1446 | } |
| 1447 | } |
| 1448 | |
| 1449 | if (h == NULL) |
| 1450 | { |
| 1451 | bfd_coff_swap_aux_out (output_bfd, (PTR) auxp, isymp->n_type, |
| 1452 | isymp->n_sclass, i, isymp->n_numaux, |
| 1453 | (PTR) outsym); |
| 1454 | outsym += osymesz; |
| 1455 | } |
| 1456 | |
| 1457 | esym += isymesz; |
| 1458 | } |
| 1459 | } |
| 1460 | |
| 1461 | indexp += add; |
| 1462 | isymp += add; |
| 1463 | sym_hash += add; |
| 1464 | } |
| 1465 | |
| 1466 | /* Relocate the line numbers, unless we are stripping them. */ |
| 1467 | if (finfo->info->strip == strip_none |
| 1468 | || finfo->info->strip == strip_some) |
| 1469 | { |
| 1470 | for (o = input_bfd->sections; o != NULL; o = o->next) |
| 1471 | { |
| 1472 | bfd_vma offset; |
| 1473 | bfd_byte *eline; |
| 1474 | bfd_byte *elineend; |
| 1475 | |
| 1476 | if (o->lineno_count == 0) |
| 1477 | continue; |
| 1478 | |
| 1479 | if (bfd_seek (input_bfd, o->line_filepos, SEEK_SET) != 0 |
| 1480 | || bfd_read (finfo->linenos, linesz, o->lineno_count, |
| 1481 | input_bfd) != linesz * o->lineno_count) |
| 1482 | return false; |
| 1483 | |
| 1484 | offset = o->output_section->vma + o->output_offset - o->vma; |
| 1485 | eline = finfo->linenos; |
| 1486 | elineend = eline + linesz * o->lineno_count; |
| 1487 | for (; eline < elineend; eline += linesz) |
| 1488 | { |
| 1489 | struct internal_lineno iline; |
| 1490 | |
| 1491 | bfd_coff_swap_lineno_in (input_bfd, (PTR) eline, (PTR) &iline); |
| 1492 | |
| 1493 | if (iline.l_lnno != 0) |
| 1494 | iline.l_addr.l_paddr += offset; |
| 1495 | else if (iline.l_addr.l_symndx >= 0 |
| 1496 | && (iline.l_addr.l_symndx |
| 1497 | < obj_raw_syment_count (input_bfd))) |
| 1498 | { |
| 1499 | long indx; |
| 1500 | |
| 1501 | indx = finfo->sym_indices[iline.l_addr.l_symndx]; |
| 1502 | |
| 1503 | if (indx < 0) |
| 1504 | { |
| 1505 | /* These line numbers are attached to a symbol |
| 1506 | which we are stripping. We should really |
| 1507 | just discard the line numbers, but that would |
| 1508 | be a pain because we have already counted |
| 1509 | them. */ |
| 1510 | indx = 0; |
| 1511 | } |
| 1512 | else |
| 1513 | { |
| 1514 | struct internal_syment is; |
| 1515 | union internal_auxent ia; |
| 1516 | |
| 1517 | /* Fix up the lnnoptr field in the aux entry of |
| 1518 | the symbol. It turns out that we can't do |
| 1519 | this when we modify the symbol aux entries, |
| 1520 | because gas sometimes screws up the lnnoptr |
| 1521 | field and makes it an offset from the start |
| 1522 | of the line numbers rather than an absolute |
| 1523 | file index. */ |
| 1524 | bfd_coff_swap_sym_in (output_bfd, |
| 1525 | (PTR) (finfo->outsyms |
| 1526 | + ((indx - syment_base) |
| 1527 | * osymesz)), |
| 1528 | (PTR) &is); |
| 1529 | if ((ISFCN (is.n_type) |
| 1530 | || is.n_sclass == C_BLOCK) |
| 1531 | && is.n_numaux >= 1) |
| 1532 | { |
| 1533 | PTR auxptr; |
| 1534 | |
| 1535 | auxptr = (PTR) (finfo->outsyms |
| 1536 | + ((indx - syment_base + 1) |
| 1537 | * osymesz)); |
| 1538 | bfd_coff_swap_aux_in (output_bfd, auxptr, |
| 1539 | is.n_type, is.n_sclass, |
| 1540 | 0, is.n_numaux, (PTR) &ia); |
| 1541 | ia.x_sym.x_fcnary.x_fcn.x_lnnoptr = |
| 1542 | (o->output_section->line_filepos |
| 1543 | + o->output_section->lineno_count * linesz |
| 1544 | + eline - finfo->linenos); |
| 1545 | bfd_coff_swap_aux_out (output_bfd, (PTR) &ia, |
| 1546 | is.n_type, is.n_sclass, 0, |
| 1547 | is.n_numaux, auxptr); |
| 1548 | } |
| 1549 | } |
| 1550 | |
| 1551 | iline.l_addr.l_symndx = indx; |
| 1552 | } |
| 1553 | |
| 1554 | bfd_coff_swap_lineno_out (output_bfd, (PTR) &iline, (PTR) eline); |
| 1555 | } |
| 1556 | |
| 1557 | if (bfd_seek (output_bfd, |
| 1558 | (o->output_section->line_filepos |
| 1559 | + o->output_section->lineno_count * linesz), |
| 1560 | SEEK_SET) != 0 |
| 1561 | || bfd_write (finfo->linenos, linesz, o->lineno_count, |
| 1562 | output_bfd) != linesz * o->lineno_count) |
| 1563 | return false; |
| 1564 | |
| 1565 | o->output_section->lineno_count += o->lineno_count; |
| 1566 | } |
| 1567 | } |
| 1568 | |
| 1569 | /* If we swapped out a C_FILE symbol, guess that the next C_FILE |
| 1570 | symbol will be the first symbol in the next input file. In the |
| 1571 | normal case, this will save us from writing out the C_FILE symbol |
| 1572 | again. */ |
| 1573 | if (finfo->last_file_index >= syment_base) |
| 1574 | { |
| 1575 | finfo->last_file.n_value = output_index; |
| 1576 | bfd_coff_swap_sym_out (output_bfd, (PTR) &finfo->last_file, |
| 1577 | (PTR) (finfo->outsyms |
| 1578 | + ((finfo->last_file_index - syment_base) |
| 1579 | * osymesz))); |
| 1580 | } |
| 1581 | |
| 1582 | /* Write the modified symbols to the output file. */ |
| 1583 | if (outsym > finfo->outsyms) |
| 1584 | { |
| 1585 | if (bfd_seek (output_bfd, |
| 1586 | obj_sym_filepos (output_bfd) + syment_base * osymesz, |
| 1587 | SEEK_SET) != 0 |
| 1588 | || bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1, |
| 1589 | output_bfd) != outsym - finfo->outsyms) |
| 1590 | return false; |
| 1591 | |
| 1592 | BFD_ASSERT ((obj_raw_syment_count (output_bfd) |
| 1593 | + (outsym - finfo->outsyms) / osymesz) |
| 1594 | == output_index); |
| 1595 | |
| 1596 | obj_raw_syment_count (output_bfd) = output_index; |
| 1597 | } |
| 1598 | |
| 1599 | /* Relocate the contents of each section. */ |
| 1600 | relsz = bfd_coff_relsz (input_bfd); |
| 1601 | for (o = input_bfd->sections; o != NULL; o = o->next) |
| 1602 | { |
| 1603 | if ((o->flags & SEC_HAS_CONTENTS) == 0) |
| 1604 | continue; |
| 1605 | |
| 1606 | if (! bfd_get_section_contents (input_bfd, o, finfo->contents, |
| 1607 | (file_ptr) 0, o->_raw_size)) |
| 1608 | return false; |
| 1609 | |
| 1610 | if ((o->flags & SEC_RELOC) != 0) |
| 1611 | { |
| 1612 | int target_index; |
| 1613 | struct internal_reloc *internal_relocs; |
| 1614 | bfd_byte *erel; |
| 1615 | bfd_byte *erel_end; |
| 1616 | struct internal_reloc *irel; |
| 1617 | |
| 1618 | /* Read in the relocs. */ |
| 1619 | if (bfd_seek (input_bfd, o->rel_filepos, SEEK_SET) != 0 |
| 1620 | || (bfd_read (finfo->external_relocs, relsz, o->reloc_count, |
| 1621 | input_bfd) != relsz * o->reloc_count)) |
| 1622 | return false; |
| 1623 | |
| 1624 | /* If we are doing a relocateable link, we keep the swapped |
| 1625 | in relocs in memory, and don't write them out until the |
| 1626 | end of the link. */ |
| 1627 | target_index = o->output_section->target_index; |
| 1628 | if (! finfo->info->relocateable) |
| 1629 | internal_relocs = finfo->internal_relocs; |
| 1630 | else |
| 1631 | internal_relocs = (finfo->section_info[target_index].relocs |
| 1632 | + o->output_section->reloc_count); |
| 1633 | |
| 1634 | /* Swap in the relocs. */ |
| 1635 | erel = finfo->external_relocs; |
| 1636 | erel_end = erel + relsz * o->reloc_count; |
| 1637 | irel = internal_relocs; |
| 1638 | for (; erel < erel_end; erel += relsz, irel++) |
| 1639 | bfd_coff_swap_reloc_in (input_bfd, (PTR) erel, (PTR) irel); |
| 1640 | |
| 1641 | /* Call processor specific code to relocate the section |
| 1642 | contents. */ |
| 1643 | if (! bfd_coff_relocate_section (output_bfd, finfo->info, |
| 1644 | input_bfd, o, |
| 1645 | finfo->contents, |
| 1646 | internal_relocs, |
| 1647 | finfo->internal_syms, |
| 1648 | finfo->sec_ptrs)) |
| 1649 | return false; |
| 1650 | |
| 1651 | if (finfo->info->relocateable) |
| 1652 | { |
| 1653 | bfd_vma offset; |
| 1654 | struct internal_reloc *irelend; |
| 1655 | struct coff_link_hash_entry **rel_hash; |
| 1656 | |
| 1657 | offset = o->output_section->vma + o->output_offset - o->vma; |
| 1658 | |
| 1659 | irel = internal_relocs; |
| 1660 | irelend = irel + o->reloc_count; |
| 1661 | rel_hash = (finfo->section_info[target_index].rel_hashes |
| 1662 | + o->output_section->reloc_count); |
| 1663 | for (; irel < irelend; irel++, rel_hash++) |
| 1664 | { |
| 1665 | struct coff_link_hash_entry *h; |
| 1666 | |
| 1667 | *rel_hash = NULL; |
| 1668 | |
| 1669 | /* Adjust the reloc address and symbol index. */ |
| 1670 | |
| 1671 | irel->r_vaddr += offset; |
| 1672 | |
| 1673 | if (irel->r_symndx == -1) |
| 1674 | continue; |
| 1675 | |
| 1676 | h = obj_coff_sym_hashes (input_bfd)[irel->r_symndx]; |
| 1677 | if (h != NULL) |
| 1678 | { |
| 1679 | /* This is a global symbol. */ |
| 1680 | if (h->indx >= 0) |
| 1681 | irel->r_symndx = h->indx; |
| 1682 | else |
| 1683 | { |
| 1684 | /* This symbol is being written at the end |
| 1685 | of the file, and we do not yet know the |
| 1686 | symbol index. We save the pointer to the |
| 1687 | hash table entry in the rel_hash list. |
| 1688 | We set the indx field to -2 to indicate |
| 1689 | that this symbol must not be stripped. */ |
| 1690 | *rel_hash = h; |
| 1691 | h->indx = -2; |
| 1692 | } |
| 1693 | } |
| 1694 | else |
| 1695 | { |
| 1696 | long indx; |
| 1697 | |
| 1698 | indx = finfo->sym_indices[irel->r_symndx]; |
| 1699 | if (indx != -1) |
| 1700 | irel->r_symndx = indx; |
| 1701 | else |
| 1702 | { |
| 1703 | struct internal_syment *is; |
| 1704 | const char *name; |
| 1705 | char buf[SYMNMLEN + 1]; |
| 1706 | |
| 1707 | /* This reloc is against a symbol we are |
| 1708 | stripping. It would be possible to |
| 1709 | handle this case, but I don't think it's |
| 1710 | worth it. */ |
| 1711 | is = finfo->internal_syms + irel->r_symndx; |
| 1712 | |
| 1713 | if (is->_n._n_n._n_zeroes == 0 |
| 1714 | && is->_n._n_n._n_offset != 0) |
| 1715 | { |
| 1716 | if (strings == NULL) |
| 1717 | { |
| 1718 | strings = coff_read_string_table (input_bfd); |
| 1719 | if (strings == NULL) |
| 1720 | return false; |
| 1721 | } |
| 1722 | name = strings + is->_n._n_n._n_offset; |
| 1723 | } |
| 1724 | else |
| 1725 | { |
| 1726 | memcpy (buf, is->_n._n_name, SYMNMLEN); |
| 1727 | buf[SYMNMLEN] = '\0'; |
| 1728 | name = buf; |
| 1729 | } |
| 1730 | |
| 1731 | if (! ((*finfo->info->callbacks->unattached_reloc) |
| 1732 | (finfo->info, name, input_bfd, o, |
| 1733 | irel->r_vaddr))) |
| 1734 | return false; |
| 1735 | } |
| 1736 | } |
| 1737 | } |
| 1738 | |
| 1739 | o->output_section->reloc_count += o->reloc_count; |
| 1740 | } |
| 1741 | } |
| 1742 | |
| 1743 | /* Write out the modified section contents. */ |
| 1744 | if (! bfd_set_section_contents (output_bfd, o->output_section, |
| 1745 | finfo->contents, o->output_offset, |
| 1746 | (o->_cooked_size != 0 |
| 1747 | ? o->_cooked_size |
| 1748 | : o->_raw_size))) |
| 1749 | return false; |
| 1750 | } |
| 1751 | |
| 1752 | if (! finfo->info->keep_memory) |
| 1753 | { |
| 1754 | if (! coff_link_free_symbols (input_bfd)) |
| 1755 | return false; |
| 1756 | } |
| 1757 | |
| 1758 | return true; |
| 1759 | } |
| 1760 | |
| 1761 | /* Write out a global symbol. Called via coff_link_hash_traverse. */ |
| 1762 | |
| 1763 | static boolean |
| 1764 | coff_write_global_sym (h, data) |
| 1765 | struct coff_link_hash_entry *h; |
| 1766 | PTR data; |
| 1767 | { |
| 1768 | struct coff_final_link_info *finfo = (struct coff_final_link_info *) data; |
| 1769 | bfd *output_bfd; |
| 1770 | struct internal_syment isym; |
| 1771 | bfd_size_type symesz; |
| 1772 | unsigned int i; |
| 1773 | |
| 1774 | output_bfd = finfo->output_bfd; |
| 1775 | |
| 1776 | if (h->indx >= 0) |
| 1777 | return true; |
| 1778 | |
| 1779 | if (h->indx != -2 |
| 1780 | && (finfo->info->strip == strip_all |
| 1781 | || (finfo->info->strip == strip_some |
| 1782 | && (bfd_hash_lookup (finfo->info->keep_hash, |
| 1783 | h->root.root.string, false, false) |
| 1784 | == NULL)))) |
| 1785 | return true; |
| 1786 | |
| 1787 | switch (h->root.type) |
| 1788 | { |
| 1789 | default: |
| 1790 | case bfd_link_hash_new: |
| 1791 | abort (); |
| 1792 | return false; |
| 1793 | |
| 1794 | case bfd_link_hash_undefined: |
| 1795 | case bfd_link_hash_weak: |
| 1796 | isym.n_scnum = N_UNDEF; |
| 1797 | isym.n_value = 0; |
| 1798 | break; |
| 1799 | |
| 1800 | case bfd_link_hash_defined: |
| 1801 | { |
| 1802 | asection *sec; |
| 1803 | |
| 1804 | sec = h->root.u.def.section->output_section; |
| 1805 | if (bfd_is_abs_section (sec)) |
| 1806 | isym.n_scnum = N_ABS; |
| 1807 | else |
| 1808 | isym.n_scnum = sec->target_index; |
| 1809 | isym.n_value = (h->root.u.def.value |
| 1810 | + sec->vma |
| 1811 | + h->root.u.def.section->output_offset); |
| 1812 | } |
| 1813 | break; |
| 1814 | |
| 1815 | case bfd_link_hash_common: |
| 1816 | isym.n_scnum = N_UNDEF; |
| 1817 | isym.n_value = h->root.u.c.size; |
| 1818 | break; |
| 1819 | |
| 1820 | case bfd_link_hash_indirect: |
| 1821 | case bfd_link_hash_warning: |
| 1822 | /* Just ignore these. They can't be handled anyhow. */ |
| 1823 | return true; |
| 1824 | } |
| 1825 | |
| 1826 | if (strlen (h->root.root.string) <= SYMNMLEN) |
| 1827 | strncpy (isym._n._n_name, h->root.root.string, SYMNMLEN); |
| 1828 | else |
| 1829 | { |
| 1830 | boolean hash; |
| 1831 | bfd_size_type indx; |
| 1832 | |
| 1833 | hash = true; |
| 1834 | if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0) |
| 1835 | hash = false; |
| 1836 | indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string, hash, |
| 1837 | false); |
| 1838 | if (indx == (bfd_size_type) -1) |
| 1839 | { |
| 1840 | finfo->failed = true; |
| 1841 | return false; |
| 1842 | } |
| 1843 | isym._n._n_n._n_zeroes = 0; |
| 1844 | isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; |
| 1845 | } |
| 1846 | |
| 1847 | isym.n_sclass = h->class; |
| 1848 | isym.n_type = h->type; |
| 1849 | |
| 1850 | if (isym.n_sclass == C_NULL) |
| 1851 | isym.n_sclass = C_EXT; |
| 1852 | |
| 1853 | isym.n_numaux = h->numaux; |
| 1854 | |
| 1855 | bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) finfo->outsyms); |
| 1856 | |
| 1857 | symesz = bfd_coff_symesz (output_bfd); |
| 1858 | |
| 1859 | if (bfd_seek (output_bfd, |
| 1860 | (obj_sym_filepos (output_bfd) |
| 1861 | + obj_raw_syment_count (output_bfd) * symesz), |
| 1862 | SEEK_SET) != 0 |
| 1863 | || bfd_write (finfo->outsyms, symesz, 1, output_bfd) != symesz) |
| 1864 | { |
| 1865 | finfo->failed = true; |
| 1866 | return false; |
| 1867 | } |
| 1868 | |
| 1869 | h->indx = obj_raw_syment_count (output_bfd); |
| 1870 | |
| 1871 | ++obj_raw_syment_count (output_bfd); |
| 1872 | |
| 1873 | /* Write out any associated aux entries. There normally will be |
| 1874 | none. If there are any, I have no idea how to modify them. */ |
| 1875 | for (i = 0; i < isym.n_numaux; i++) |
| 1876 | { |
| 1877 | bfd_coff_swap_aux_out (output_bfd, (PTR) (h->aux + i), isym.n_type, |
| 1878 | isym.n_sclass, i, isym.n_numaux, |
| 1879 | (PTR) finfo->outsyms); |
| 1880 | if (bfd_write (finfo->outsyms, symesz, 1, output_bfd) != symesz) |
| 1881 | { |
| 1882 | finfo->failed = true; |
| 1883 | return false; |
| 1884 | } |
| 1885 | ++obj_raw_syment_count (output_bfd); |
| 1886 | } |
| 1887 | |
| 1888 | return true; |
| 1889 | } |
| 1890 | |
| 1891 | /* Handle a link order which is supposed to generate a reloc. */ |
| 1892 | |
| 1893 | static boolean |
| 1894 | coff_reloc_link_order (output_bfd, finfo, output_section, link_order) |
| 1895 | bfd *output_bfd; |
| 1896 | struct coff_final_link_info *finfo; |
| 1897 | asection *output_section; |
| 1898 | struct bfd_link_order *link_order; |
| 1899 | { |
| 1900 | const reloc_howto_type *howto; |
| 1901 | struct internal_reloc *irel; |
| 1902 | struct coff_link_hash_entry **rel_hash_ptr; |
| 1903 | |
| 1904 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); |
| 1905 | if (howto == NULL) |
| 1906 | { |
| 1907 | bfd_set_error (bfd_error_bad_value); |
| 1908 | return false; |
| 1909 | } |
| 1910 | |
| 1911 | if (link_order->u.reloc.p->addend != 0) |
| 1912 | { |
| 1913 | bfd_size_type size; |
| 1914 | bfd_byte *buf; |
| 1915 | bfd_reloc_status_type rstat; |
| 1916 | boolean ok; |
| 1917 | |
| 1918 | size = bfd_get_reloc_size (howto); |
| 1919 | buf = (bfd_byte *) bfd_zmalloc (size); |
| 1920 | if (buf == NULL) |
| 1921 | { |
| 1922 | bfd_set_error (bfd_error_no_memory); |
| 1923 | return false; |
| 1924 | } |
| 1925 | |
| 1926 | rstat = _bfd_relocate_contents (howto, output_bfd, |
| 1927 | link_order->u.reloc.p->addend, buf); |
| 1928 | switch (rstat) |
| 1929 | { |
| 1930 | case bfd_reloc_ok: |
| 1931 | break; |
| 1932 | default: |
| 1933 | case bfd_reloc_outofrange: |
| 1934 | abort (); |
| 1935 | case bfd_reloc_overflow: |
| 1936 | if (! ((*finfo->info->callbacks->reloc_overflow) |
| 1937 | (finfo->info, |
| 1938 | (link_order->type == bfd_section_reloc_link_order |
| 1939 | ? bfd_section_name (output_bfd, |
| 1940 | link_order->u.reloc.p->u.section) |
| 1941 | : link_order->u.reloc.p->u.name), |
| 1942 | howto->name, link_order->u.reloc.p->addend, |
| 1943 | (bfd *) NULL, (asection *) NULL, (bfd_vma) 0))) |
| 1944 | { |
| 1945 | free (buf); |
| 1946 | return false; |
| 1947 | } |
| 1948 | break; |
| 1949 | } |
| 1950 | ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf, |
| 1951 | (file_ptr) link_order->offset, size); |
| 1952 | free (buf); |
| 1953 | if (! ok) |
| 1954 | return false; |
| 1955 | } |
| 1956 | |
| 1957 | /* Store the reloc information in the right place. It will get |
| 1958 | swapped and written out at the end of the final_link routine. */ |
| 1959 | |
| 1960 | irel = (finfo->section_info[output_section->target_index].relocs |
| 1961 | + output_section->reloc_count); |
| 1962 | rel_hash_ptr = (finfo->section_info[output_section->target_index].rel_hashes |
| 1963 | + output_section->reloc_count); |
| 1964 | |
| 1965 | memset (irel, 0, sizeof (struct internal_reloc)); |
| 1966 | *rel_hash_ptr = NULL; |
| 1967 | |
| 1968 | irel->r_vaddr = output_section->vma + link_order->offset; |
| 1969 | |
| 1970 | if (link_order->type == bfd_section_reloc_link_order) |
| 1971 | { |
| 1972 | /* We need to somehow locate a symbol in the right section. The |
| 1973 | symbol must either have a value of zero, or we must adjust |
| 1974 | the addend by the value of the symbol. FIXME: Write this |
| 1975 | when we need it. The old linker couldn't handle this anyhow. */ |
| 1976 | abort (); |
| 1977 | *rel_hash_ptr = NULL; |
| 1978 | irel->r_symndx = 0; |
| 1979 | } |
| 1980 | else |
| 1981 | { |
| 1982 | struct coff_link_hash_entry *h; |
| 1983 | |
| 1984 | h = coff_link_hash_lookup (coff_hash_table (finfo->info), |
| 1985 | link_order->u.reloc.p->u.name, |
| 1986 | false, false, true); |
| 1987 | if (h != NULL) |
| 1988 | { |
| 1989 | if (h->indx >= 0) |
| 1990 | irel->r_symndx = h->indx; |
| 1991 | else |
| 1992 | { |
| 1993 | /* Set the index to -2 to force this symbol to get |
| 1994 | written out. */ |
| 1995 | h->indx = -2; |
| 1996 | *rel_hash_ptr = h; |
| 1997 | irel->r_symndx = 0; |
| 1998 | } |
| 1999 | } |
| 2000 | else |
| 2001 | { |
| 2002 | if (! ((*finfo->info->callbacks->unattached_reloc) |
| 2003 | (finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL, |
| 2004 | (asection *) NULL, (bfd_vma) 0))) |
| 2005 | return false; |
| 2006 | irel->r_symndx = 0; |
| 2007 | } |
| 2008 | } |
| 2009 | |
| 2010 | /* FIXME: Is this always right? */ |
| 2011 | irel->r_type = howto->type; |
| 2012 | |
| 2013 | /* r_size is only used on the RS/6000, which needs its own linker |
| 2014 | routines anyhow. r_extern is only used for ECOFF. */ |
| 2015 | |
| 2016 | /* FIXME: What is the right value for r_offset? Is zero OK? */ |
| 2017 | |
| 2018 | ++output_section->reloc_count; |
| 2019 | |
| 2020 | return true; |
| 2021 | } |
| 2022 | |
| 2023 | /* A basic reloc handling routine which may be used by processors with |
| 2024 | simple relocs. */ |
| 2025 | |
| 2026 | boolean |
| 2027 | _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd, |
| 2028 | input_section, contents, relocs, syms, |
| 2029 | sections) |
| 2030 | bfd *output_bfd; |
| 2031 | struct bfd_link_info *info; |
| 2032 | bfd *input_bfd; |
| 2033 | asection *input_section; |
| 2034 | bfd_byte *contents; |
| 2035 | struct internal_reloc *relocs; |
| 2036 | struct internal_syment *syms; |
| 2037 | asection **sections; |
| 2038 | { |
| 2039 | struct internal_reloc *rel; |
| 2040 | struct internal_reloc *relend; |
| 2041 | |
| 2042 | rel = relocs; |
| 2043 | relend = rel + input_section->reloc_count; |
| 2044 | for (; rel < relend; rel++) |
| 2045 | { |
| 2046 | long symndx; |
| 2047 | struct coff_link_hash_entry *h; |
| 2048 | struct internal_syment *sym; |
| 2049 | bfd_vma addend; |
| 2050 | bfd_vma val; |
| 2051 | const reloc_howto_type *howto; |
| 2052 | bfd_reloc_status_type rstat; |
| 2053 | |
| 2054 | symndx = rel->r_symndx; |
| 2055 | |
| 2056 | if (symndx == -1) |
| 2057 | { |
| 2058 | h = NULL; |
| 2059 | sym = NULL; |
| 2060 | } |
| 2061 | else |
| 2062 | { |
| 2063 | h = obj_coff_sym_hashes (input_bfd)[symndx]; |
| 2064 | sym = syms + symndx; |
| 2065 | } |
| 2066 | |
| 2067 | /* COFF treats common symbols in one of two ways. Either the |
| 2068 | size of the symbol is included in the section contents, or it |
| 2069 | is not. We assume that the size is not included, and force |
| 2070 | the rtype_to_howto function to adjust the addend as needed. */ |
| 2071 | if (sym != NULL && sym->n_scnum != 0) |
| 2072 | addend = - sym->n_value; |
| 2073 | else |
| 2074 | addend = 0; |
| 2075 | |
| 2076 | howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h, |
| 2077 | sym, &addend); |
| 2078 | if (howto == NULL) |
| 2079 | return false; |
| 2080 | |
| 2081 | val = 0; |
| 2082 | |
| 2083 | if (h == NULL) |
| 2084 | { |
| 2085 | asection *sec; |
| 2086 | |
| 2087 | if (symndx == -1) |
| 2088 | { |
| 2089 | sec = bfd_abs_section_ptr; |
| 2090 | val = 0; |
| 2091 | } |
| 2092 | else |
| 2093 | { |
| 2094 | sec = sections[symndx]; |
| 2095 | val = (sec->output_section->vma |
| 2096 | + sec->output_offset |
| 2097 | + sym->n_value |
| 2098 | - sec->vma); |
| 2099 | } |
| 2100 | } |
| 2101 | else |
| 2102 | { |
| 2103 | if (h->root.type == bfd_link_hash_defined) |
| 2104 | { |
| 2105 | asection *sec; |
| 2106 | |
| 2107 | sec = h->root.u.def.section; |
| 2108 | val = (h->root.u.def.value |
| 2109 | + sec->output_section->vma |
| 2110 | + sec->output_offset); |
| 2111 | } |
| 2112 | else if (! info->relocateable) |
| 2113 | { |
| 2114 | if (! ((*info->callbacks->undefined_symbol) |
| 2115 | (info, h->root.root.string, input_bfd, input_section, |
| 2116 | rel->r_vaddr - input_section->vma))) |
| 2117 | return false; |
| 2118 | } |
| 2119 | } |
| 2120 | |
| 2121 | rstat = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 2122 | contents, |
| 2123 | rel->r_vaddr - input_section->vma, |
| 2124 | val, addend); |
| 2125 | |
| 2126 | switch (rstat) |
| 2127 | { |
| 2128 | default: |
| 2129 | abort (); |
| 2130 | case bfd_reloc_ok: |
| 2131 | break; |
| 2132 | case bfd_reloc_overflow: |
| 2133 | { |
| 2134 | const char *name; |
| 2135 | char buf[SYMNMLEN + 1]; |
| 2136 | |
| 2137 | if (symndx == -1) |
| 2138 | name = "*ABS*"; |
| 2139 | else if (h != NULL) |
| 2140 | name = h->root.root.string; |
| 2141 | else if (sym->_n._n_n._n_zeroes == 0 |
| 2142 | && sym->_n._n_n._n_offset != 0) |
| 2143 | name = obj_coff_strings (input_bfd) + sym->_n._n_n._n_offset; |
| 2144 | else |
| 2145 | { |
| 2146 | strncpy (buf, sym->_n._n_name, SYMNMLEN); |
| 2147 | buf[SYMNMLEN] = '\0'; |
| 2148 | name = buf; |
| 2149 | } |
| 2150 | |
| 2151 | if (! ((*info->callbacks->reloc_overflow) |
| 2152 | (info, name, howto->name, (bfd_vma) 0, input_bfd, |
| 2153 | input_section, rel->r_vaddr - input_section->vma))) |
| 2154 | return false; |
| 2155 | } |
| 2156 | } |
| 2157 | } |
| 2158 | |
| 2159 | return true; |
| 2160 | } |