| 1 | /* POWER/PowerPC XCOFF linker support. |
| 2 | Copyright (C) 1995-2020 Free Software Foundation, Inc. |
| 3 | Written by Ian Lance Taylor <ian@cygnus.com>, 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 3 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., 51 Franklin Street - Fifth Floor, Boston, |
| 20 | MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include "sysdep.h" |
| 23 | #include "bfd.h" |
| 24 | #include "bfdlink.h" |
| 25 | #include "libbfd.h" |
| 26 | #include "coff/internal.h" |
| 27 | #include "coff/xcoff.h" |
| 28 | #include "libcoff.h" |
| 29 | #include "libxcoff.h" |
| 30 | #include "libiberty.h" |
| 31 | #include "xcofflink.h" |
| 32 | |
| 33 | /* This file holds the XCOFF linker code. */ |
| 34 | |
| 35 | #undef STRING_SIZE_SIZE |
| 36 | #define STRING_SIZE_SIZE 4 |
| 37 | |
| 38 | /* We reuse the SEC_ROM flag as a mark flag for garbage collection. |
| 39 | This flag will only be used on input sections. */ |
| 40 | |
| 41 | #define SEC_MARK (SEC_ROM) |
| 42 | |
| 43 | /* The list of import files. */ |
| 44 | |
| 45 | struct xcoff_import_file |
| 46 | { |
| 47 | /* The next entry in the list. */ |
| 48 | struct xcoff_import_file *next; |
| 49 | /* The path. */ |
| 50 | const char *path; |
| 51 | /* The file name. */ |
| 52 | const char *file; |
| 53 | /* The member name. */ |
| 54 | const char *member; |
| 55 | }; |
| 56 | |
| 57 | /* Information we keep for each section in the output file during the |
| 58 | final link phase. */ |
| 59 | |
| 60 | struct xcoff_link_section_info |
| 61 | { |
| 62 | /* The relocs to be output. */ |
| 63 | struct internal_reloc *relocs; |
| 64 | /* For each reloc against a global symbol whose index was not known |
| 65 | when the reloc was handled, the global hash table entry. */ |
| 66 | struct xcoff_link_hash_entry **rel_hashes; |
| 67 | /* If there is a TOC relative reloc against a global symbol, and the |
| 68 | index of the TOC symbol is not known when the reloc was handled, |
| 69 | an entry is added to this linked list. This is not an array, |
| 70 | like rel_hashes, because this case is quite uncommon. */ |
| 71 | struct xcoff_toc_rel_hash |
| 72 | { |
| 73 | struct xcoff_toc_rel_hash *next; |
| 74 | struct xcoff_link_hash_entry *h; |
| 75 | struct internal_reloc *rel; |
| 76 | } *toc_rel_hashes; |
| 77 | }; |
| 78 | |
| 79 | /* Information that the XCOFF linker collects about an archive. */ |
| 80 | struct xcoff_archive_info |
| 81 | { |
| 82 | /* The archive described by this entry. */ |
| 83 | bfd *archive; |
| 84 | |
| 85 | /* The import path and import filename to use when referring to |
| 86 | this archive in the .loader section. */ |
| 87 | const char *imppath; |
| 88 | const char *impfile; |
| 89 | |
| 90 | /* True if the archive contains a dynamic object. */ |
| 91 | unsigned int contains_shared_object_p : 1; |
| 92 | |
| 93 | /* True if the previous field is valid. */ |
| 94 | unsigned int know_contains_shared_object_p : 1; |
| 95 | }; |
| 96 | |
| 97 | struct xcoff_link_hash_table |
| 98 | { |
| 99 | struct bfd_link_hash_table root; |
| 100 | |
| 101 | /* The .debug string hash table. We need to compute this while |
| 102 | reading the input files, so that we know how large the .debug |
| 103 | section will be before we assign section positions. */ |
| 104 | struct bfd_strtab_hash *debug_strtab; |
| 105 | |
| 106 | /* The .debug section we will use for the final output. */ |
| 107 | asection *debug_section; |
| 108 | |
| 109 | /* The .loader section we will use for the final output. */ |
| 110 | asection *loader_section; |
| 111 | |
| 112 | /* A count of non TOC relative relocs which will need to be |
| 113 | allocated in the .loader section. */ |
| 114 | size_t ldrel_count; |
| 115 | |
| 116 | /* The .loader section header. */ |
| 117 | struct internal_ldhdr ldhdr; |
| 118 | |
| 119 | /* The .gl section we use to hold global linkage code. */ |
| 120 | asection *linkage_section; |
| 121 | |
| 122 | /* The .tc section we use to hold toc entries we build for global |
| 123 | linkage code. */ |
| 124 | asection *toc_section; |
| 125 | |
| 126 | /* The .ds section we use to hold function descriptors which we |
| 127 | create for exported symbols. */ |
| 128 | asection *descriptor_section; |
| 129 | |
| 130 | /* The list of import files. */ |
| 131 | struct xcoff_import_file *imports; |
| 132 | |
| 133 | /* Required alignment of sections within the output file. */ |
| 134 | unsigned long file_align; |
| 135 | |
| 136 | /* Whether the .text section must be read-only. */ |
| 137 | bfd_boolean textro; |
| 138 | |
| 139 | /* Whether -brtl was specified. */ |
| 140 | bfd_boolean rtld; |
| 141 | |
| 142 | /* Whether garbage collection was done. */ |
| 143 | bfd_boolean gc; |
| 144 | |
| 145 | /* A linked list of symbols for which we have size information. */ |
| 146 | struct xcoff_link_size_list |
| 147 | { |
| 148 | struct xcoff_link_size_list *next; |
| 149 | struct xcoff_link_hash_entry *h; |
| 150 | bfd_size_type size; |
| 151 | } |
| 152 | *size_list; |
| 153 | |
| 154 | /* Information about archives. */ |
| 155 | htab_t archive_info; |
| 156 | |
| 157 | /* Magic sections: _text, _etext, _data, _edata, _end, end. */ |
| 158 | asection *special_sections[XCOFF_NUMBER_OF_SPECIAL_SECTIONS]; |
| 159 | }; |
| 160 | |
| 161 | /* Information that we pass around while doing the final link step. */ |
| 162 | |
| 163 | struct xcoff_final_link_info |
| 164 | { |
| 165 | /* General link information. */ |
| 166 | struct bfd_link_info *info; |
| 167 | /* Output BFD. */ |
| 168 | bfd *output_bfd; |
| 169 | /* Hash table for long symbol names. */ |
| 170 | struct bfd_strtab_hash *strtab; |
| 171 | /* Array of information kept for each output section, indexed by the |
| 172 | target_index field. */ |
| 173 | struct xcoff_link_section_info *section_info; |
| 174 | /* Symbol index of last C_FILE symbol (-1 if none). */ |
| 175 | long last_file_index; |
| 176 | /* Contents of last C_FILE symbol. */ |
| 177 | struct internal_syment last_file; |
| 178 | /* Symbol index of TOC symbol. */ |
| 179 | long toc_symindx; |
| 180 | /* Start of .loader symbols. */ |
| 181 | bfd_byte *ldsym; |
| 182 | /* Next .loader reloc to swap out. */ |
| 183 | bfd_byte *ldrel; |
| 184 | /* File position of start of line numbers. */ |
| 185 | file_ptr line_filepos; |
| 186 | /* Buffer large enough to hold swapped symbols of any input file. */ |
| 187 | struct internal_syment *internal_syms; |
| 188 | /* Buffer large enough to hold output indices of symbols of any |
| 189 | input file. */ |
| 190 | long *sym_indices; |
| 191 | /* Buffer large enough to hold output symbols for any input file. */ |
| 192 | bfd_byte *outsyms; |
| 193 | /* Buffer large enough to hold external line numbers for any input |
| 194 | section. */ |
| 195 | bfd_byte *linenos; |
| 196 | /* Buffer large enough to hold any input section. */ |
| 197 | bfd_byte *contents; |
| 198 | /* Buffer large enough to hold external relocs of any input section. */ |
| 199 | bfd_byte *external_relocs; |
| 200 | }; |
| 201 | |
| 202 | static bfd_boolean xcoff_mark (struct bfd_link_info *, asection *); |
| 203 | |
| 204 | \f |
| 205 | |
| 206 | /* Routines to read XCOFF dynamic information. This don't really |
| 207 | belong here, but we already have the ldsym manipulation routines |
| 208 | here. */ |
| 209 | |
| 210 | /* Read the contents of a section. */ |
| 211 | |
| 212 | static bfd_boolean |
| 213 | xcoff_get_section_contents (bfd *abfd, asection *sec) |
| 214 | { |
| 215 | if (coff_section_data (abfd, sec) == NULL) |
| 216 | { |
| 217 | size_t amt = sizeof (struct coff_section_tdata); |
| 218 | |
| 219 | sec->used_by_bfd = bfd_zalloc (abfd, amt); |
| 220 | if (sec->used_by_bfd == NULL) |
| 221 | return FALSE; |
| 222 | } |
| 223 | |
| 224 | if (coff_section_data (abfd, sec)->contents == NULL) |
| 225 | { |
| 226 | bfd_byte *contents; |
| 227 | |
| 228 | if (! bfd_malloc_and_get_section (abfd, sec, &contents)) |
| 229 | { |
| 230 | if (contents != NULL) |
| 231 | free (contents); |
| 232 | return FALSE; |
| 233 | } |
| 234 | coff_section_data (abfd, sec)->contents = contents; |
| 235 | } |
| 236 | |
| 237 | return TRUE; |
| 238 | } |
| 239 | |
| 240 | /* Get the size required to hold the dynamic symbols. */ |
| 241 | |
| 242 | long |
| 243 | _bfd_xcoff_get_dynamic_symtab_upper_bound (bfd *abfd) |
| 244 | { |
| 245 | asection *lsec; |
| 246 | bfd_byte *contents; |
| 247 | struct internal_ldhdr ldhdr; |
| 248 | |
| 249 | if ((abfd->flags & DYNAMIC) == 0) |
| 250 | { |
| 251 | bfd_set_error (bfd_error_invalid_operation); |
| 252 | return -1; |
| 253 | } |
| 254 | |
| 255 | lsec = bfd_get_section_by_name (abfd, ".loader"); |
| 256 | if (lsec == NULL) |
| 257 | { |
| 258 | bfd_set_error (bfd_error_no_symbols); |
| 259 | return -1; |
| 260 | } |
| 261 | |
| 262 | if (! xcoff_get_section_contents (abfd, lsec)) |
| 263 | return -1; |
| 264 | contents = coff_section_data (abfd, lsec)->contents; |
| 265 | |
| 266 | bfd_xcoff_swap_ldhdr_in (abfd, (void *) contents, &ldhdr); |
| 267 | |
| 268 | return (ldhdr.l_nsyms + 1) * sizeof (asymbol *); |
| 269 | } |
| 270 | |
| 271 | /* Get the dynamic symbols. */ |
| 272 | |
| 273 | long |
| 274 | _bfd_xcoff_canonicalize_dynamic_symtab (bfd *abfd, asymbol **psyms) |
| 275 | { |
| 276 | asection *lsec; |
| 277 | bfd_byte *contents; |
| 278 | struct internal_ldhdr ldhdr; |
| 279 | const char *strings; |
| 280 | bfd_byte *elsym, *elsymend; |
| 281 | coff_symbol_type *symbuf; |
| 282 | |
| 283 | if ((abfd->flags & DYNAMIC) == 0) |
| 284 | { |
| 285 | bfd_set_error (bfd_error_invalid_operation); |
| 286 | return -1; |
| 287 | } |
| 288 | |
| 289 | lsec = bfd_get_section_by_name (abfd, ".loader"); |
| 290 | if (lsec == NULL) |
| 291 | { |
| 292 | bfd_set_error (bfd_error_no_symbols); |
| 293 | return -1; |
| 294 | } |
| 295 | |
| 296 | if (! xcoff_get_section_contents (abfd, lsec)) |
| 297 | return -1; |
| 298 | contents = coff_section_data (abfd, lsec)->contents; |
| 299 | |
| 300 | coff_section_data (abfd, lsec)->keep_contents = TRUE; |
| 301 | |
| 302 | bfd_xcoff_swap_ldhdr_in (abfd, contents, &ldhdr); |
| 303 | |
| 304 | strings = (char *) contents + ldhdr.l_stoff; |
| 305 | |
| 306 | symbuf = bfd_zalloc (abfd, ldhdr.l_nsyms * sizeof (* symbuf)); |
| 307 | if (symbuf == NULL) |
| 308 | return -1; |
| 309 | |
| 310 | elsym = contents + bfd_xcoff_loader_symbol_offset(abfd, &ldhdr); |
| 311 | |
| 312 | elsymend = elsym + ldhdr.l_nsyms * bfd_xcoff_ldsymsz(abfd); |
| 313 | for (; elsym < elsymend; elsym += bfd_xcoff_ldsymsz(abfd), symbuf++, psyms++) |
| 314 | { |
| 315 | struct internal_ldsym ldsym; |
| 316 | |
| 317 | bfd_xcoff_swap_ldsym_in (abfd, elsym, &ldsym); |
| 318 | |
| 319 | symbuf->symbol.the_bfd = abfd; |
| 320 | |
| 321 | if (ldsym._l._l_l._l_zeroes == 0) |
| 322 | symbuf->symbol.name = strings + ldsym._l._l_l._l_offset; |
| 323 | else |
| 324 | { |
| 325 | char *c; |
| 326 | |
| 327 | c = bfd_alloc (abfd, (bfd_size_type) SYMNMLEN + 1); |
| 328 | if (c == NULL) |
| 329 | return -1; |
| 330 | memcpy (c, ldsym._l._l_name, SYMNMLEN); |
| 331 | c[SYMNMLEN] = '\0'; |
| 332 | symbuf->symbol.name = c; |
| 333 | } |
| 334 | |
| 335 | if (ldsym.l_smclas == XMC_XO) |
| 336 | symbuf->symbol.section = bfd_abs_section_ptr; |
| 337 | else |
| 338 | symbuf->symbol.section = coff_section_from_bfd_index (abfd, |
| 339 | ldsym.l_scnum); |
| 340 | symbuf->symbol.value = ldsym.l_value - symbuf->symbol.section->vma; |
| 341 | |
| 342 | symbuf->symbol.flags = BSF_NO_FLAGS; |
| 343 | if ((ldsym.l_smtype & L_EXPORT) != 0) |
| 344 | { |
| 345 | if ((ldsym.l_smtype & L_WEAK) != 0) |
| 346 | symbuf->symbol.flags |= BSF_WEAK; |
| 347 | else |
| 348 | symbuf->symbol.flags |= BSF_GLOBAL; |
| 349 | } |
| 350 | |
| 351 | /* FIXME: We have no way to record the other information stored |
| 352 | with the loader symbol. */ |
| 353 | *psyms = (asymbol *) symbuf; |
| 354 | } |
| 355 | |
| 356 | *psyms = NULL; |
| 357 | |
| 358 | return ldhdr.l_nsyms; |
| 359 | } |
| 360 | |
| 361 | /* Get the size required to hold the dynamic relocs. */ |
| 362 | |
| 363 | long |
| 364 | _bfd_xcoff_get_dynamic_reloc_upper_bound (bfd *abfd) |
| 365 | { |
| 366 | asection *lsec; |
| 367 | bfd_byte *contents; |
| 368 | struct internal_ldhdr ldhdr; |
| 369 | |
| 370 | if ((abfd->flags & DYNAMIC) == 0) |
| 371 | { |
| 372 | bfd_set_error (bfd_error_invalid_operation); |
| 373 | return -1; |
| 374 | } |
| 375 | |
| 376 | lsec = bfd_get_section_by_name (abfd, ".loader"); |
| 377 | if (lsec == NULL) |
| 378 | { |
| 379 | bfd_set_error (bfd_error_no_symbols); |
| 380 | return -1; |
| 381 | } |
| 382 | |
| 383 | if (! xcoff_get_section_contents (abfd, lsec)) |
| 384 | return -1; |
| 385 | contents = coff_section_data (abfd, lsec)->contents; |
| 386 | |
| 387 | bfd_xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr); |
| 388 | |
| 389 | return (ldhdr.l_nreloc + 1) * sizeof (arelent *); |
| 390 | } |
| 391 | |
| 392 | /* Get the dynamic relocs. */ |
| 393 | |
| 394 | long |
| 395 | _bfd_xcoff_canonicalize_dynamic_reloc (bfd *abfd, |
| 396 | arelent **prelocs, |
| 397 | asymbol **syms) |
| 398 | { |
| 399 | asection *lsec; |
| 400 | bfd_byte *contents; |
| 401 | struct internal_ldhdr ldhdr; |
| 402 | arelent *relbuf; |
| 403 | bfd_byte *elrel, *elrelend; |
| 404 | |
| 405 | if ((abfd->flags & DYNAMIC) == 0) |
| 406 | { |
| 407 | bfd_set_error (bfd_error_invalid_operation); |
| 408 | return -1; |
| 409 | } |
| 410 | |
| 411 | lsec = bfd_get_section_by_name (abfd, ".loader"); |
| 412 | if (lsec == NULL) |
| 413 | { |
| 414 | bfd_set_error (bfd_error_no_symbols); |
| 415 | return -1; |
| 416 | } |
| 417 | |
| 418 | if (! xcoff_get_section_contents (abfd, lsec)) |
| 419 | return -1; |
| 420 | contents = coff_section_data (abfd, lsec)->contents; |
| 421 | |
| 422 | bfd_xcoff_swap_ldhdr_in (abfd, contents, &ldhdr); |
| 423 | |
| 424 | relbuf = bfd_alloc (abfd, ldhdr.l_nreloc * sizeof (arelent)); |
| 425 | if (relbuf == NULL) |
| 426 | return -1; |
| 427 | |
| 428 | elrel = contents + bfd_xcoff_loader_reloc_offset(abfd, &ldhdr); |
| 429 | |
| 430 | elrelend = elrel + ldhdr.l_nreloc * bfd_xcoff_ldrelsz(abfd); |
| 431 | for (; elrel < elrelend; elrel += bfd_xcoff_ldrelsz(abfd), relbuf++, |
| 432 | prelocs++) |
| 433 | { |
| 434 | struct internal_ldrel ldrel; |
| 435 | |
| 436 | bfd_xcoff_swap_ldrel_in (abfd, elrel, &ldrel); |
| 437 | |
| 438 | if (ldrel.l_symndx >= 3) |
| 439 | relbuf->sym_ptr_ptr = syms + (ldrel.l_symndx - 3); |
| 440 | else |
| 441 | { |
| 442 | const char *name; |
| 443 | asection *sec; |
| 444 | |
| 445 | switch (ldrel.l_symndx) |
| 446 | { |
| 447 | case 0: |
| 448 | name = ".text"; |
| 449 | break; |
| 450 | case 1: |
| 451 | name = ".data"; |
| 452 | break; |
| 453 | case 2: |
| 454 | name = ".bss"; |
| 455 | break; |
| 456 | default: |
| 457 | abort (); |
| 458 | break; |
| 459 | } |
| 460 | |
| 461 | sec = bfd_get_section_by_name (abfd, name); |
| 462 | if (sec == NULL) |
| 463 | { |
| 464 | bfd_set_error (bfd_error_bad_value); |
| 465 | return -1; |
| 466 | } |
| 467 | |
| 468 | relbuf->sym_ptr_ptr = sec->symbol_ptr_ptr; |
| 469 | } |
| 470 | |
| 471 | relbuf->address = ldrel.l_vaddr; |
| 472 | relbuf->addend = 0; |
| 473 | |
| 474 | /* Most dynamic relocs have the same type. FIXME: This is only |
| 475 | correct if ldrel.l_rtype == 0. In other cases, we should use |
| 476 | a different howto. */ |
| 477 | relbuf->howto = bfd_xcoff_dynamic_reloc_howto(abfd); |
| 478 | |
| 479 | /* FIXME: We have no way to record the l_rsecnm field. */ |
| 480 | |
| 481 | *prelocs = relbuf; |
| 482 | } |
| 483 | |
| 484 | *prelocs = NULL; |
| 485 | |
| 486 | return ldhdr.l_nreloc; |
| 487 | } |
| 488 | \f |
| 489 | /* Hash functions for xcoff_link_hash_table's archive_info. */ |
| 490 | |
| 491 | static hashval_t |
| 492 | xcoff_archive_info_hash (const void *data) |
| 493 | { |
| 494 | const struct xcoff_archive_info *info; |
| 495 | |
| 496 | info = (const struct xcoff_archive_info *) data; |
| 497 | return htab_hash_pointer (info->archive); |
| 498 | } |
| 499 | |
| 500 | static int |
| 501 | xcoff_archive_info_eq (const void *data1, const void *data2) |
| 502 | { |
| 503 | const struct xcoff_archive_info *info1; |
| 504 | const struct xcoff_archive_info *info2; |
| 505 | |
| 506 | info1 = (const struct xcoff_archive_info *) data1; |
| 507 | info2 = (const struct xcoff_archive_info *) data2; |
| 508 | return info1->archive == info2->archive; |
| 509 | } |
| 510 | |
| 511 | /* Return information about archive ARCHIVE. Return NULL on error. */ |
| 512 | |
| 513 | static struct xcoff_archive_info * |
| 514 | xcoff_get_archive_info (struct bfd_link_info *info, bfd *archive) |
| 515 | { |
| 516 | struct xcoff_link_hash_table *htab; |
| 517 | struct xcoff_archive_info *entryp, entry; |
| 518 | void **slot; |
| 519 | |
| 520 | htab = xcoff_hash_table (info); |
| 521 | entry.archive = archive; |
| 522 | slot = htab_find_slot (htab->archive_info, &entry, INSERT); |
| 523 | if (!slot) |
| 524 | return NULL; |
| 525 | |
| 526 | entryp = *slot; |
| 527 | if (!entryp) |
| 528 | { |
| 529 | entryp = bfd_zalloc (archive, sizeof (entry)); |
| 530 | if (!entryp) |
| 531 | return NULL; |
| 532 | |
| 533 | entryp->archive = archive; |
| 534 | *slot = entryp; |
| 535 | } |
| 536 | return entryp; |
| 537 | } |
| 538 | \f |
| 539 | /* Routine to create an entry in an XCOFF link hash table. */ |
| 540 | |
| 541 | static struct bfd_hash_entry * |
| 542 | xcoff_link_hash_newfunc (struct bfd_hash_entry *entry, |
| 543 | struct bfd_hash_table *table, |
| 544 | const char *string) |
| 545 | { |
| 546 | struct xcoff_link_hash_entry *ret = (struct xcoff_link_hash_entry *) entry; |
| 547 | |
| 548 | /* Allocate the structure if it has not already been allocated by a |
| 549 | subclass. */ |
| 550 | if (ret == NULL) |
| 551 | ret = bfd_hash_allocate (table, sizeof (* ret)); |
| 552 | if (ret == NULL) |
| 553 | return NULL; |
| 554 | |
| 555 | /* Call the allocation method of the superclass. */ |
| 556 | ret = ((struct xcoff_link_hash_entry *) |
| 557 | _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 558 | table, string)); |
| 559 | if (ret != NULL) |
| 560 | { |
| 561 | /* Set local fields. */ |
| 562 | ret->indx = -1; |
| 563 | ret->toc_section = NULL; |
| 564 | ret->u.toc_indx = -1; |
| 565 | ret->descriptor = NULL; |
| 566 | ret->ldsym = NULL; |
| 567 | ret->ldindx = -1; |
| 568 | ret->flags = 0; |
| 569 | ret->smclas = XMC_UA; |
| 570 | } |
| 571 | |
| 572 | return (struct bfd_hash_entry *) ret; |
| 573 | } |
| 574 | |
| 575 | /* Destroy an XCOFF link hash table. */ |
| 576 | |
| 577 | static void |
| 578 | _bfd_xcoff_bfd_link_hash_table_free (bfd *obfd) |
| 579 | { |
| 580 | struct xcoff_link_hash_table *ret; |
| 581 | |
| 582 | ret = (struct xcoff_link_hash_table *) obfd->link.hash; |
| 583 | if (ret->archive_info) |
| 584 | htab_delete (ret->archive_info); |
| 585 | if (ret->debug_strtab) |
| 586 | _bfd_stringtab_free (ret->debug_strtab); |
| 587 | _bfd_generic_link_hash_table_free (obfd); |
| 588 | } |
| 589 | |
| 590 | /* Create an XCOFF link hash table. */ |
| 591 | |
| 592 | struct bfd_link_hash_table * |
| 593 | _bfd_xcoff_bfd_link_hash_table_create (bfd *abfd) |
| 594 | { |
| 595 | struct xcoff_link_hash_table *ret; |
| 596 | size_t amt = sizeof (* ret); |
| 597 | |
| 598 | ret = bfd_zmalloc (amt); |
| 599 | if (ret == NULL) |
| 600 | return NULL; |
| 601 | if (!_bfd_link_hash_table_init (&ret->root, abfd, xcoff_link_hash_newfunc, |
| 602 | sizeof (struct xcoff_link_hash_entry))) |
| 603 | { |
| 604 | free (ret); |
| 605 | return NULL; |
| 606 | } |
| 607 | |
| 608 | ret->debug_strtab = _bfd_xcoff_stringtab_init (); |
| 609 | ret->archive_info = htab_create (37, xcoff_archive_info_hash, |
| 610 | xcoff_archive_info_eq, NULL); |
| 611 | if (!ret->debug_strtab || !ret->archive_info) |
| 612 | { |
| 613 | _bfd_xcoff_bfd_link_hash_table_free (abfd); |
| 614 | return NULL; |
| 615 | } |
| 616 | ret->root.hash_table_free = _bfd_xcoff_bfd_link_hash_table_free; |
| 617 | |
| 618 | /* The linker will always generate a full a.out header. We need to |
| 619 | record that fact now, before the sizeof_headers routine could be |
| 620 | called. */ |
| 621 | xcoff_data (abfd)->full_aouthdr = TRUE; |
| 622 | |
| 623 | return &ret->root; |
| 624 | } |
| 625 | \f |
| 626 | /* Read internal relocs for an XCOFF csect. This is a wrapper around |
| 627 | _bfd_coff_read_internal_relocs which tries to take advantage of any |
| 628 | relocs which may have been cached for the enclosing section. */ |
| 629 | |
| 630 | static struct internal_reloc * |
| 631 | xcoff_read_internal_relocs (bfd *abfd, |
| 632 | asection *sec, |
| 633 | bfd_boolean cache, |
| 634 | bfd_byte *external_relocs, |
| 635 | bfd_boolean require_internal, |
| 636 | struct internal_reloc *internal_relocs) |
| 637 | { |
| 638 | if (coff_section_data (abfd, sec) != NULL |
| 639 | && coff_section_data (abfd, sec)->relocs == NULL |
| 640 | && xcoff_section_data (abfd, sec) != NULL) |
| 641 | { |
| 642 | asection *enclosing; |
| 643 | |
| 644 | enclosing = xcoff_section_data (abfd, sec)->enclosing; |
| 645 | |
| 646 | if (enclosing != NULL |
| 647 | && (coff_section_data (abfd, enclosing) == NULL |
| 648 | || coff_section_data (abfd, enclosing)->relocs == NULL) |
| 649 | && cache |
| 650 | && enclosing->reloc_count > 0) |
| 651 | { |
| 652 | if (_bfd_coff_read_internal_relocs (abfd, enclosing, TRUE, |
| 653 | external_relocs, FALSE, NULL) |
| 654 | == NULL) |
| 655 | return NULL; |
| 656 | } |
| 657 | |
| 658 | if (enclosing != NULL |
| 659 | && coff_section_data (abfd, enclosing) != NULL |
| 660 | && coff_section_data (abfd, enclosing)->relocs != NULL) |
| 661 | { |
| 662 | size_t off; |
| 663 | |
| 664 | off = ((sec->rel_filepos - enclosing->rel_filepos) |
| 665 | / bfd_coff_relsz (abfd)); |
| 666 | |
| 667 | if (! require_internal) |
| 668 | return coff_section_data (abfd, enclosing)->relocs + off; |
| 669 | memcpy (internal_relocs, |
| 670 | coff_section_data (abfd, enclosing)->relocs + off, |
| 671 | sec->reloc_count * sizeof (struct internal_reloc)); |
| 672 | return internal_relocs; |
| 673 | } |
| 674 | } |
| 675 | |
| 676 | return _bfd_coff_read_internal_relocs (abfd, sec, cache, external_relocs, |
| 677 | require_internal, internal_relocs); |
| 678 | } |
| 679 | \f |
| 680 | /* Split FILENAME into an import path and an import filename, |
| 681 | storing them in *IMPPATH and *IMPFILE respectively. */ |
| 682 | |
| 683 | bfd_boolean |
| 684 | bfd_xcoff_split_import_path (bfd *abfd, const char *filename, |
| 685 | const char **imppath, const char **impfile) |
| 686 | { |
| 687 | const char *base; |
| 688 | size_t length; |
| 689 | char *path; |
| 690 | |
| 691 | base = lbasename (filename); |
| 692 | length = base - filename; |
| 693 | if (length == 0) |
| 694 | /* The filename has no directory component, so use an empty path. */ |
| 695 | *imppath = ""; |
| 696 | else if (length == 1) |
| 697 | /* The filename is in the root directory. */ |
| 698 | *imppath = "/"; |
| 699 | else |
| 700 | { |
| 701 | /* Extract the (non-empty) directory part. Note that we don't |
| 702 | need to strip duplicate directory separators from any part |
| 703 | of the string; the native linker doesn't do that either. */ |
| 704 | path = bfd_alloc (abfd, length); |
| 705 | if (path == NULL) |
| 706 | return FALSE; |
| 707 | memcpy (path, filename, length - 1); |
| 708 | path[length - 1] = 0; |
| 709 | *imppath = path; |
| 710 | } |
| 711 | *impfile = base; |
| 712 | return TRUE; |
| 713 | } |
| 714 | |
| 715 | /* Set ARCHIVE's import path as though its filename had been given |
| 716 | as FILENAME. */ |
| 717 | |
| 718 | bfd_boolean |
| 719 | bfd_xcoff_set_archive_import_path (struct bfd_link_info *info, |
| 720 | bfd *archive, const char *filename) |
| 721 | { |
| 722 | struct xcoff_archive_info *archive_info; |
| 723 | |
| 724 | archive_info = xcoff_get_archive_info (info, archive); |
| 725 | return (archive_info != NULL |
| 726 | && bfd_xcoff_split_import_path (archive, filename, |
| 727 | &archive_info->imppath, |
| 728 | &archive_info->impfile)); |
| 729 | } |
| 730 | |
| 731 | /* H is an imported symbol. Set the import module's path, file and member |
| 732 | to IMPATH, IMPFILE and IMPMEMBER respectively. All three are null if |
| 733 | no specific import module is specified. */ |
| 734 | |
| 735 | static bfd_boolean |
| 736 | xcoff_set_import_path (struct bfd_link_info *info, |
| 737 | struct xcoff_link_hash_entry *h, |
| 738 | const char *imppath, const char *impfile, |
| 739 | const char *impmember) |
| 740 | { |
| 741 | unsigned int c; |
| 742 | struct xcoff_import_file **pp; |
| 743 | |
| 744 | /* We overload the ldindx field to hold the l_ifile value for this |
| 745 | symbol. */ |
| 746 | BFD_ASSERT (h->ldsym == NULL); |
| 747 | BFD_ASSERT ((h->flags & XCOFF_BUILT_LDSYM) == 0); |
| 748 | if (imppath == NULL) |
| 749 | h->ldindx = -1; |
| 750 | else |
| 751 | { |
| 752 | /* We start c at 1 because the first entry in the import list is |
| 753 | reserved for the library search path. */ |
| 754 | for (pp = &xcoff_hash_table (info)->imports, c = 1; |
| 755 | *pp != NULL; |
| 756 | pp = &(*pp)->next, ++c) |
| 757 | { |
| 758 | if (filename_cmp ((*pp)->path, imppath) == 0 |
| 759 | && filename_cmp ((*pp)->file, impfile) == 0 |
| 760 | && filename_cmp ((*pp)->member, impmember) == 0) |
| 761 | break; |
| 762 | } |
| 763 | |
| 764 | if (*pp == NULL) |
| 765 | { |
| 766 | struct xcoff_import_file *n; |
| 767 | size_t amt = sizeof (*n); |
| 768 | |
| 769 | n = bfd_alloc (info->output_bfd, amt); |
| 770 | if (n == NULL) |
| 771 | return FALSE; |
| 772 | n->next = NULL; |
| 773 | n->path = imppath; |
| 774 | n->file = impfile; |
| 775 | n->member = impmember; |
| 776 | *pp = n; |
| 777 | } |
| 778 | h->ldindx = c; |
| 779 | } |
| 780 | return TRUE; |
| 781 | } |
| 782 | \f |
| 783 | /* H is the bfd symbol associated with exported .loader symbol LDSYM. |
| 784 | Return true if LDSYM defines H. */ |
| 785 | |
| 786 | static bfd_boolean |
| 787 | xcoff_dynamic_definition_p (struct xcoff_link_hash_entry *h, |
| 788 | struct internal_ldsym *ldsym) |
| 789 | { |
| 790 | /* If we didn't know about H before processing LDSYM, LDSYM |
| 791 | definitely defines H. */ |
| 792 | if (h->root.type == bfd_link_hash_new) |
| 793 | return TRUE; |
| 794 | |
| 795 | /* If H is currently a weak dynamic symbol, and if LDSYM is a strong |
| 796 | dynamic symbol, LDSYM trumps the current definition of H. */ |
| 797 | if ((ldsym->l_smtype & L_WEAK) == 0 |
| 798 | && (h->flags & XCOFF_DEF_DYNAMIC) != 0 |
| 799 | && (h->flags & XCOFF_DEF_REGULAR) == 0 |
| 800 | && (h->root.type == bfd_link_hash_defweak |
| 801 | || h->root.type == bfd_link_hash_undefweak)) |
| 802 | return TRUE; |
| 803 | |
| 804 | /* If H is currently undefined, LDSYM defines it. */ |
| 805 | if ((h->flags & XCOFF_DEF_DYNAMIC) == 0 |
| 806 | && (h->root.type == bfd_link_hash_undefined |
| 807 | || h->root.type == bfd_link_hash_undefweak)) |
| 808 | return TRUE; |
| 809 | |
| 810 | return FALSE; |
| 811 | } |
| 812 | |
| 813 | /* This function is used to add symbols from a dynamic object to the |
| 814 | global symbol table. */ |
| 815 | |
| 816 | static bfd_boolean |
| 817 | xcoff_link_add_dynamic_symbols (bfd *abfd, struct bfd_link_info *info) |
| 818 | { |
| 819 | asection *lsec; |
| 820 | bfd_byte *contents; |
| 821 | struct internal_ldhdr ldhdr; |
| 822 | const char *strings; |
| 823 | bfd_byte *elsym, *elsymend; |
| 824 | struct xcoff_import_file *n; |
| 825 | unsigned int c; |
| 826 | struct xcoff_import_file **pp; |
| 827 | |
| 828 | /* We can only handle a dynamic object if we are generating an XCOFF |
| 829 | output file. */ |
| 830 | if (info->output_bfd->xvec != abfd->xvec) |
| 831 | { |
| 832 | _bfd_error_handler |
| 833 | (_("%pB: XCOFF shared object when not producing XCOFF output"), |
| 834 | abfd); |
| 835 | bfd_set_error (bfd_error_invalid_operation); |
| 836 | return FALSE; |
| 837 | } |
| 838 | |
| 839 | /* The symbols we use from a dynamic object are not the symbols in |
| 840 | the normal symbol table, but, rather, the symbols in the export |
| 841 | table. If there is a global symbol in a dynamic object which is |
| 842 | not in the export table, the loader will not be able to find it, |
| 843 | so we don't want to find it either. Also, on AIX 4.1.3, shr.o in |
| 844 | libc.a has symbols in the export table which are not in the |
| 845 | symbol table. */ |
| 846 | |
| 847 | /* Read in the .loader section. FIXME: We should really use the |
| 848 | o_snloader field in the a.out header, rather than grabbing the |
| 849 | section by name. */ |
| 850 | lsec = bfd_get_section_by_name (abfd, ".loader"); |
| 851 | if (lsec == NULL) |
| 852 | { |
| 853 | _bfd_error_handler |
| 854 | (_("%pB: dynamic object with no .loader section"), |
| 855 | abfd); |
| 856 | bfd_set_error (bfd_error_no_symbols); |
| 857 | return FALSE; |
| 858 | } |
| 859 | |
| 860 | if (! xcoff_get_section_contents (abfd, lsec)) |
| 861 | return FALSE; |
| 862 | contents = coff_section_data (abfd, lsec)->contents; |
| 863 | |
| 864 | /* Remove the sections from this object, so that they do not get |
| 865 | included in the link. */ |
| 866 | bfd_section_list_clear (abfd); |
| 867 | |
| 868 | bfd_xcoff_swap_ldhdr_in (abfd, contents, &ldhdr); |
| 869 | |
| 870 | strings = (char *) contents + ldhdr.l_stoff; |
| 871 | |
| 872 | elsym = contents + bfd_xcoff_loader_symbol_offset(abfd, &ldhdr); |
| 873 | |
| 874 | elsymend = elsym + ldhdr.l_nsyms * bfd_xcoff_ldsymsz(abfd); |
| 875 | |
| 876 | for (; elsym < elsymend; elsym += bfd_xcoff_ldsymsz(abfd)) |
| 877 | { |
| 878 | struct internal_ldsym ldsym; |
| 879 | char nambuf[SYMNMLEN + 1]; |
| 880 | const char *name; |
| 881 | struct xcoff_link_hash_entry *h; |
| 882 | |
| 883 | bfd_xcoff_swap_ldsym_in (abfd, elsym, &ldsym); |
| 884 | |
| 885 | /* We are only interested in exported symbols. */ |
| 886 | if ((ldsym.l_smtype & L_EXPORT) == 0) |
| 887 | continue; |
| 888 | |
| 889 | if (ldsym._l._l_l._l_zeroes == 0) |
| 890 | name = strings + ldsym._l._l_l._l_offset; |
| 891 | else |
| 892 | { |
| 893 | memcpy (nambuf, ldsym._l._l_name, SYMNMLEN); |
| 894 | nambuf[SYMNMLEN] = '\0'; |
| 895 | name = nambuf; |
| 896 | } |
| 897 | |
| 898 | /* Normally we could not call xcoff_link_hash_lookup in an add |
| 899 | symbols routine, since we might not be using an XCOFF hash |
| 900 | table. However, we verified above that we are using an XCOFF |
| 901 | hash table. */ |
| 902 | |
| 903 | h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, TRUE, |
| 904 | TRUE, TRUE); |
| 905 | if (h == NULL) |
| 906 | return FALSE; |
| 907 | |
| 908 | if (!xcoff_dynamic_definition_p (h, &ldsym)) |
| 909 | continue; |
| 910 | |
| 911 | h->flags |= XCOFF_DEF_DYNAMIC; |
| 912 | h->smclas = ldsym.l_smclas; |
| 913 | if (h->smclas == XMC_XO) |
| 914 | { |
| 915 | /* This symbol has an absolute value. */ |
| 916 | if ((ldsym.l_smtype & L_WEAK) != 0) |
| 917 | h->root.type = bfd_link_hash_defweak; |
| 918 | else |
| 919 | h->root.type = bfd_link_hash_defined; |
| 920 | h->root.u.def.section = bfd_abs_section_ptr; |
| 921 | h->root.u.def.value = ldsym.l_value; |
| 922 | } |
| 923 | else |
| 924 | { |
| 925 | /* Otherwise, we don't bother to actually define the symbol, |
| 926 | since we don't have a section to put it in anyhow. |
| 927 | We assume instead that an undefined XCOFF_DEF_DYNAMIC symbol |
| 928 | should be imported from the symbol's undef.abfd. */ |
| 929 | if ((ldsym.l_smtype & L_WEAK) != 0) |
| 930 | h->root.type = bfd_link_hash_undefweak; |
| 931 | else |
| 932 | h->root.type = bfd_link_hash_undefined; |
| 933 | h->root.u.undef.abfd = abfd; |
| 934 | } |
| 935 | |
| 936 | /* If this symbol defines a function descriptor, then it |
| 937 | implicitly defines the function code as well. */ |
| 938 | if (h->smclas == XMC_DS |
| 939 | || (h->smclas == XMC_XO && name[0] != '.')) |
| 940 | h->flags |= XCOFF_DESCRIPTOR; |
| 941 | if ((h->flags & XCOFF_DESCRIPTOR) != 0) |
| 942 | { |
| 943 | struct xcoff_link_hash_entry *hds; |
| 944 | |
| 945 | hds = h->descriptor; |
| 946 | if (hds == NULL) |
| 947 | { |
| 948 | char *dsnm; |
| 949 | |
| 950 | dsnm = bfd_malloc ((bfd_size_type) strlen (name) + 2); |
| 951 | if (dsnm == NULL) |
| 952 | return FALSE; |
| 953 | dsnm[0] = '.'; |
| 954 | strcpy (dsnm + 1, name); |
| 955 | hds = xcoff_link_hash_lookup (xcoff_hash_table (info), dsnm, |
| 956 | TRUE, TRUE, TRUE); |
| 957 | free (dsnm); |
| 958 | if (hds == NULL) |
| 959 | return FALSE; |
| 960 | |
| 961 | hds->descriptor = h; |
| 962 | h->descriptor = hds; |
| 963 | } |
| 964 | |
| 965 | if (xcoff_dynamic_definition_p (hds, &ldsym)) |
| 966 | { |
| 967 | hds->root.type = h->root.type; |
| 968 | hds->flags |= XCOFF_DEF_DYNAMIC; |
| 969 | if (h->smclas == XMC_XO) |
| 970 | { |
| 971 | /* An absolute symbol appears to actually define code, not a |
| 972 | function descriptor. This is how some math functions are |
| 973 | implemented on AIX 4.1. */ |
| 974 | hds->smclas = XMC_XO; |
| 975 | hds->root.u.def.section = bfd_abs_section_ptr; |
| 976 | hds->root.u.def.value = ldsym.l_value; |
| 977 | } |
| 978 | else |
| 979 | { |
| 980 | hds->smclas = XMC_PR; |
| 981 | hds->root.u.undef.abfd = abfd; |
| 982 | /* We do not want to add this to the undefined |
| 983 | symbol list. */ |
| 984 | } |
| 985 | } |
| 986 | } |
| 987 | } |
| 988 | |
| 989 | if (contents != NULL && ! coff_section_data (abfd, lsec)->keep_contents) |
| 990 | { |
| 991 | free (coff_section_data (abfd, lsec)->contents); |
| 992 | coff_section_data (abfd, lsec)->contents = NULL; |
| 993 | } |
| 994 | |
| 995 | /* Record this file in the import files. */ |
| 996 | n = bfd_alloc (abfd, (bfd_size_type) sizeof (struct xcoff_import_file)); |
| 997 | if (n == NULL) |
| 998 | return FALSE; |
| 999 | n->next = NULL; |
| 1000 | |
| 1001 | if (abfd->my_archive == NULL || bfd_is_thin_archive (abfd->my_archive)) |
| 1002 | { |
| 1003 | if (!bfd_xcoff_split_import_path (abfd, bfd_get_filename (abfd), |
| 1004 | &n->path, &n->file)) |
| 1005 | return FALSE; |
| 1006 | n->member = ""; |
| 1007 | } |
| 1008 | else |
| 1009 | { |
| 1010 | struct xcoff_archive_info *archive_info; |
| 1011 | |
| 1012 | archive_info = xcoff_get_archive_info (info, abfd->my_archive); |
| 1013 | if (!archive_info->impfile) |
| 1014 | { |
| 1015 | if (!bfd_xcoff_split_import_path (archive_info->archive, |
| 1016 | bfd_get_filename (archive_info |
| 1017 | ->archive), |
| 1018 | &archive_info->imppath, |
| 1019 | &archive_info->impfile)) |
| 1020 | return FALSE; |
| 1021 | } |
| 1022 | n->path = archive_info->imppath; |
| 1023 | n->file = archive_info->impfile; |
| 1024 | n->member = bfd_get_filename (abfd); |
| 1025 | } |
| 1026 | |
| 1027 | /* We start c at 1 because the first import file number is reserved |
| 1028 | for LIBPATH. */ |
| 1029 | for (pp = &xcoff_hash_table (info)->imports, c = 1; |
| 1030 | *pp != NULL; |
| 1031 | pp = &(*pp)->next, ++c) |
| 1032 | ; |
| 1033 | *pp = n; |
| 1034 | |
| 1035 | xcoff_data (abfd)->import_file_id = c; |
| 1036 | |
| 1037 | return TRUE; |
| 1038 | } |
| 1039 | |
| 1040 | /* xcoff_link_create_extra_sections |
| 1041 | |
| 1042 | Takes care of creating the .loader, .gl, .ds, .debug and sections. */ |
| 1043 | |
| 1044 | static bfd_boolean |
| 1045 | xcoff_link_create_extra_sections (bfd * abfd, struct bfd_link_info *info) |
| 1046 | { |
| 1047 | bfd_boolean return_value = FALSE; |
| 1048 | |
| 1049 | if (info->output_bfd->xvec == abfd->xvec) |
| 1050 | { |
| 1051 | /* We need to build a .loader section, so we do it here. This |
| 1052 | won't work if we're producing an XCOFF output file with no |
| 1053 | XCOFF input files. FIXME. */ |
| 1054 | |
| 1055 | if (!bfd_link_relocatable (info) |
| 1056 | && xcoff_hash_table (info)->loader_section == NULL) |
| 1057 | { |
| 1058 | asection *lsec; |
| 1059 | flagword flags = SEC_HAS_CONTENTS | SEC_IN_MEMORY; |
| 1060 | |
| 1061 | lsec = bfd_make_section_anyway_with_flags (abfd, ".loader", flags); |
| 1062 | if (lsec == NULL) |
| 1063 | goto end_return; |
| 1064 | |
| 1065 | xcoff_hash_table (info)->loader_section = lsec; |
| 1066 | } |
| 1067 | |
| 1068 | /* Likewise for the linkage section. */ |
| 1069 | if (xcoff_hash_table (info)->linkage_section == NULL) |
| 1070 | { |
| 1071 | asection *lsec; |
| 1072 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| 1073 | | SEC_IN_MEMORY); |
| 1074 | |
| 1075 | lsec = bfd_make_section_anyway_with_flags (abfd, ".gl", flags); |
| 1076 | if (lsec == NULL) |
| 1077 | goto end_return; |
| 1078 | |
| 1079 | xcoff_hash_table (info)->linkage_section = lsec; |
| 1080 | lsec->alignment_power = 2; |
| 1081 | } |
| 1082 | |
| 1083 | /* Likewise for the TOC section. */ |
| 1084 | if (xcoff_hash_table (info)->toc_section == NULL) |
| 1085 | { |
| 1086 | asection *tsec; |
| 1087 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| 1088 | | SEC_IN_MEMORY); |
| 1089 | |
| 1090 | tsec = bfd_make_section_anyway_with_flags (abfd, ".tc", flags); |
| 1091 | if (tsec == NULL) |
| 1092 | goto end_return; |
| 1093 | |
| 1094 | xcoff_hash_table (info)->toc_section = tsec; |
| 1095 | tsec->alignment_power = 2; |
| 1096 | } |
| 1097 | |
| 1098 | /* Likewise for the descriptor section. */ |
| 1099 | if (xcoff_hash_table (info)->descriptor_section == NULL) |
| 1100 | { |
| 1101 | asection *dsec; |
| 1102 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| 1103 | | SEC_IN_MEMORY); |
| 1104 | |
| 1105 | dsec = bfd_make_section_anyway_with_flags (abfd, ".ds", flags); |
| 1106 | if (dsec == NULL) |
| 1107 | goto end_return; |
| 1108 | |
| 1109 | xcoff_hash_table (info)->descriptor_section = dsec; |
| 1110 | dsec->alignment_power = 2; |
| 1111 | } |
| 1112 | |
| 1113 | /* Likewise for the .debug section. */ |
| 1114 | if (xcoff_hash_table (info)->debug_section == NULL |
| 1115 | && info->strip != strip_all) |
| 1116 | { |
| 1117 | asection *dsec; |
| 1118 | flagword flags = SEC_HAS_CONTENTS | SEC_IN_MEMORY; |
| 1119 | |
| 1120 | dsec = bfd_make_section_anyway_with_flags (abfd, ".debug", flags); |
| 1121 | if (dsec == NULL) |
| 1122 | goto end_return; |
| 1123 | |
| 1124 | xcoff_hash_table (info)->debug_section = dsec; |
| 1125 | } |
| 1126 | } |
| 1127 | |
| 1128 | return_value = TRUE; |
| 1129 | |
| 1130 | end_return: |
| 1131 | |
| 1132 | return return_value; |
| 1133 | } |
| 1134 | |
| 1135 | /* Returns the index of reloc in RELOCS with the least address greater |
| 1136 | than or equal to ADDRESS. The relocs are sorted by address. */ |
| 1137 | |
| 1138 | static bfd_size_type |
| 1139 | xcoff_find_reloc (struct internal_reloc *relocs, |
| 1140 | bfd_size_type count, |
| 1141 | bfd_vma address) |
| 1142 | { |
| 1143 | bfd_size_type min, max, this; |
| 1144 | |
| 1145 | if (count < 2) |
| 1146 | { |
| 1147 | if (count == 1 && relocs[0].r_vaddr < address) |
| 1148 | return 1; |
| 1149 | else |
| 1150 | return 0; |
| 1151 | } |
| 1152 | |
| 1153 | min = 0; |
| 1154 | max = count; |
| 1155 | |
| 1156 | /* Do a binary search over (min,max]. */ |
| 1157 | while (min + 1 < max) |
| 1158 | { |
| 1159 | bfd_vma raddr; |
| 1160 | |
| 1161 | this = (max + min) / 2; |
| 1162 | raddr = relocs[this].r_vaddr; |
| 1163 | if (raddr > address) |
| 1164 | max = this; |
| 1165 | else if (raddr < address) |
| 1166 | min = this; |
| 1167 | else |
| 1168 | { |
| 1169 | min = this; |
| 1170 | break; |
| 1171 | } |
| 1172 | } |
| 1173 | |
| 1174 | if (relocs[min].r_vaddr < address) |
| 1175 | return min + 1; |
| 1176 | |
| 1177 | while (min > 0 |
| 1178 | && relocs[min - 1].r_vaddr == address) |
| 1179 | --min; |
| 1180 | |
| 1181 | return min; |
| 1182 | } |
| 1183 | |
| 1184 | /* Add all the symbols from an object file to the hash table. |
| 1185 | |
| 1186 | XCOFF is a weird format. A normal XCOFF .o files will have three |
| 1187 | COFF sections--.text, .data, and .bss--but each COFF section will |
| 1188 | contain many csects. These csects are described in the symbol |
| 1189 | table. From the linker's point of view, each csect must be |
| 1190 | considered a section in its own right. For example, a TOC entry is |
| 1191 | handled as a small XMC_TC csect. The linker must be able to merge |
| 1192 | different TOC entries together, which means that it must be able to |
| 1193 | extract the XMC_TC csects from the .data section of the input .o |
| 1194 | file. |
| 1195 | |
| 1196 | From the point of view of our linker, this is, of course, a hideous |
| 1197 | nightmare. We cope by actually creating sections for each csect, |
| 1198 | and discarding the original sections. We then have to handle the |
| 1199 | relocation entries carefully, since the only way to tell which |
| 1200 | csect they belong to is to examine the address. */ |
| 1201 | |
| 1202 | static bfd_boolean |
| 1203 | xcoff_link_add_symbols (bfd *abfd, struct bfd_link_info *info) |
| 1204 | { |
| 1205 | unsigned int n_tmask; |
| 1206 | unsigned int n_btshft; |
| 1207 | bfd_boolean default_copy; |
| 1208 | bfd_size_type symcount; |
| 1209 | struct xcoff_link_hash_entry **sym_hash; |
| 1210 | asection **csect_cache; |
| 1211 | unsigned int *lineno_counts; |
| 1212 | bfd_size_type linesz; |
| 1213 | asection *o; |
| 1214 | asection *last_real; |
| 1215 | bfd_boolean keep_syms; |
| 1216 | asection *csect; |
| 1217 | unsigned int csect_index; |
| 1218 | asection *first_csect; |
| 1219 | bfd_size_type symesz; |
| 1220 | bfd_byte *esym; |
| 1221 | bfd_byte *esym_end; |
| 1222 | struct reloc_info_struct |
| 1223 | { |
| 1224 | struct internal_reloc *relocs; |
| 1225 | asection **csects; |
| 1226 | bfd_byte *linenos; |
| 1227 | } *reloc_info = NULL; |
| 1228 | bfd_size_type amt; |
| 1229 | |
| 1230 | keep_syms = obj_coff_keep_syms (abfd); |
| 1231 | |
| 1232 | if ((abfd->flags & DYNAMIC) != 0 |
| 1233 | && ! info->static_link) |
| 1234 | { |
| 1235 | if (! xcoff_link_add_dynamic_symbols (abfd, info)) |
| 1236 | return FALSE; |
| 1237 | } |
| 1238 | |
| 1239 | /* Create the loader, toc, gl, ds and debug sections, if needed. */ |
| 1240 | if (! xcoff_link_create_extra_sections (abfd, info)) |
| 1241 | goto error_return; |
| 1242 | |
| 1243 | if ((abfd->flags & DYNAMIC) != 0 |
| 1244 | && ! info->static_link) |
| 1245 | return TRUE; |
| 1246 | |
| 1247 | n_tmask = coff_data (abfd)->local_n_tmask; |
| 1248 | n_btshft = coff_data (abfd)->local_n_btshft; |
| 1249 | |
| 1250 | /* Define macros so that ISFCN, et. al., macros work correctly. */ |
| 1251 | #define N_TMASK n_tmask |
| 1252 | #define N_BTSHFT n_btshft |
| 1253 | |
| 1254 | if (info->keep_memory) |
| 1255 | default_copy = FALSE; |
| 1256 | else |
| 1257 | default_copy = TRUE; |
| 1258 | |
| 1259 | symcount = obj_raw_syment_count (abfd); |
| 1260 | |
| 1261 | /* We keep a list of the linker hash table entries that correspond |
| 1262 | to each external symbol. */ |
| 1263 | amt = symcount * sizeof (struct xcoff_link_hash_entry *); |
| 1264 | sym_hash = bfd_zalloc (abfd, amt); |
| 1265 | if (sym_hash == NULL && symcount != 0) |
| 1266 | goto error_return; |
| 1267 | coff_data (abfd)->sym_hashes = (struct coff_link_hash_entry **) sym_hash; |
| 1268 | |
| 1269 | /* Because of the weird stuff we are doing with XCOFF csects, we can |
| 1270 | not easily determine which section a symbol is in, so we store |
| 1271 | the information in the tdata for the input file. */ |
| 1272 | amt = symcount * sizeof (asection *); |
| 1273 | csect_cache = bfd_zalloc (abfd, amt); |
| 1274 | if (csect_cache == NULL && symcount != 0) |
| 1275 | goto error_return; |
| 1276 | xcoff_data (abfd)->csects = csect_cache; |
| 1277 | |
| 1278 | /* We garbage-collect line-number information on a symbol-by-symbol |
| 1279 | basis, so we need to have quick access to the number of entries |
| 1280 | per symbol. */ |
| 1281 | amt = symcount * sizeof (unsigned int); |
| 1282 | lineno_counts = bfd_zalloc (abfd, amt); |
| 1283 | if (lineno_counts == NULL && symcount != 0) |
| 1284 | goto error_return; |
| 1285 | xcoff_data (abfd)->lineno_counts = lineno_counts; |
| 1286 | |
| 1287 | /* While splitting sections into csects, we need to assign the |
| 1288 | relocs correctly. The relocs and the csects must both be in |
| 1289 | order by VMA within a given section, so we handle this by |
| 1290 | scanning along the relocs as we process the csects. We index |
| 1291 | into reloc_info using the section target_index. */ |
| 1292 | amt = abfd->section_count + 1; |
| 1293 | amt *= sizeof (struct reloc_info_struct); |
| 1294 | reloc_info = bfd_zmalloc (amt); |
| 1295 | if (reloc_info == NULL) |
| 1296 | goto error_return; |
| 1297 | |
| 1298 | /* Read in the relocs and line numbers for each section. */ |
| 1299 | linesz = bfd_coff_linesz (abfd); |
| 1300 | last_real = NULL; |
| 1301 | for (o = abfd->sections; o != NULL; o = o->next) |
| 1302 | { |
| 1303 | last_real = o; |
| 1304 | |
| 1305 | if ((o->flags & SEC_RELOC) != 0) |
| 1306 | { |
| 1307 | reloc_info[o->target_index].relocs = |
| 1308 | xcoff_read_internal_relocs (abfd, o, TRUE, NULL, FALSE, NULL); |
| 1309 | amt = o->reloc_count; |
| 1310 | amt *= sizeof (asection *); |
| 1311 | reloc_info[o->target_index].csects = bfd_zmalloc (amt); |
| 1312 | if (reloc_info[o->target_index].csects == NULL) |
| 1313 | goto error_return; |
| 1314 | } |
| 1315 | |
| 1316 | if ((info->strip == strip_none || info->strip == strip_some) |
| 1317 | && o->lineno_count > 0) |
| 1318 | { |
| 1319 | bfd_byte *linenos; |
| 1320 | |
| 1321 | if (bfd_seek (abfd, o->line_filepos, SEEK_SET) != 0) |
| 1322 | goto error_return; |
| 1323 | if (_bfd_mul_overflow (linesz, o->lineno_count, &amt)) |
| 1324 | { |
| 1325 | bfd_set_error (bfd_error_file_too_big); |
| 1326 | goto error_return; |
| 1327 | } |
| 1328 | linenos = _bfd_malloc_and_read (abfd, amt, amt); |
| 1329 | if (linenos == NULL) |
| 1330 | goto error_return; |
| 1331 | reloc_info[o->target_index].linenos = linenos; |
| 1332 | } |
| 1333 | } |
| 1334 | |
| 1335 | /* Don't let the linker relocation routines discard the symbols. */ |
| 1336 | obj_coff_keep_syms (abfd) = TRUE; |
| 1337 | |
| 1338 | csect = NULL; |
| 1339 | csect_index = 0; |
| 1340 | first_csect = NULL; |
| 1341 | |
| 1342 | symesz = bfd_coff_symesz (abfd); |
| 1343 | BFD_ASSERT (symesz == bfd_coff_auxesz (abfd)); |
| 1344 | esym = (bfd_byte *) obj_coff_external_syms (abfd); |
| 1345 | esym_end = esym + symcount * symesz; |
| 1346 | |
| 1347 | while (esym < esym_end) |
| 1348 | { |
| 1349 | struct internal_syment sym; |
| 1350 | union internal_auxent aux; |
| 1351 | const char *name; |
| 1352 | char buf[SYMNMLEN + 1]; |
| 1353 | int smtyp; |
| 1354 | asection *section; |
| 1355 | bfd_vma value; |
| 1356 | struct xcoff_link_hash_entry *set_toc; |
| 1357 | |
| 1358 | bfd_coff_swap_sym_in (abfd, (void *) esym, (void *) &sym); |
| 1359 | |
| 1360 | /* In this pass we are only interested in symbols with csect |
| 1361 | information. */ |
| 1362 | if (!CSECT_SYM_P (sym.n_sclass)) |
| 1363 | { |
| 1364 | /* Set csect_cache, |
| 1365 | Normally csect is a .pr, .rw etc. created in the loop |
| 1366 | If C_FILE or first time, handle special |
| 1367 | |
| 1368 | Advance esym, sym_hash, csect_hash ptrs. */ |
| 1369 | if (sym.n_sclass == C_FILE || sym.n_sclass == C_DWARF) |
| 1370 | csect = NULL; |
| 1371 | if (csect != NULL) |
| 1372 | *csect_cache = csect; |
| 1373 | else if (first_csect == NULL |
| 1374 | || sym.n_sclass == C_FILE || sym.n_sclass == C_DWARF) |
| 1375 | *csect_cache = coff_section_from_bfd_index (abfd, sym.n_scnum); |
| 1376 | else |
| 1377 | *csect_cache = NULL; |
| 1378 | esym += (sym.n_numaux + 1) * symesz; |
| 1379 | sym_hash += sym.n_numaux + 1; |
| 1380 | csect_cache += sym.n_numaux + 1; |
| 1381 | lineno_counts += sym.n_numaux + 1; |
| 1382 | |
| 1383 | continue; |
| 1384 | } |
| 1385 | |
| 1386 | name = _bfd_coff_internal_syment_name (abfd, &sym, buf); |
| 1387 | |
| 1388 | if (name == NULL) |
| 1389 | goto error_return; |
| 1390 | |
| 1391 | /* If this symbol has line number information attached to it, |
| 1392 | and we're not stripping it, count the number of entries and |
| 1393 | add them to the count for this csect. In the final link pass |
| 1394 | we are going to attach line number information by symbol, |
| 1395 | rather than by section, in order to more easily handle |
| 1396 | garbage collection. */ |
| 1397 | if ((info->strip == strip_none || info->strip == strip_some) |
| 1398 | && sym.n_numaux > 1 |
| 1399 | && csect != NULL |
| 1400 | && ISFCN (sym.n_type)) |
| 1401 | { |
| 1402 | union internal_auxent auxlin; |
| 1403 | |
| 1404 | bfd_coff_swap_aux_in (abfd, (void *) (esym + symesz), |
| 1405 | sym.n_type, sym.n_sclass, |
| 1406 | 0, sym.n_numaux, (void *) &auxlin); |
| 1407 | |
| 1408 | if (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0) |
| 1409 | { |
| 1410 | asection *enclosing; |
| 1411 | bfd_signed_vma linoff; |
| 1412 | |
| 1413 | enclosing = xcoff_section_data (abfd, csect)->enclosing; |
| 1414 | if (enclosing == NULL) |
| 1415 | { |
| 1416 | _bfd_error_handler |
| 1417 | /* xgettext:c-format */ |
| 1418 | (_("%pB: `%s' has line numbers but no enclosing section"), |
| 1419 | abfd, name); |
| 1420 | bfd_set_error (bfd_error_bad_value); |
| 1421 | goto error_return; |
| 1422 | } |
| 1423 | linoff = (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr |
| 1424 | - enclosing->line_filepos); |
| 1425 | /* Explicit cast to bfd_signed_vma for compiler. */ |
| 1426 | if (linoff < (bfd_signed_vma) (enclosing->lineno_count * linesz)) |
| 1427 | { |
| 1428 | struct internal_lineno lin; |
| 1429 | bfd_byte *linpstart; |
| 1430 | |
| 1431 | linpstart = (reloc_info[enclosing->target_index].linenos |
| 1432 | + linoff); |
| 1433 | bfd_coff_swap_lineno_in (abfd, (void *) linpstart, (void *) &lin); |
| 1434 | if (lin.l_lnno == 0 |
| 1435 | && ((bfd_size_type) lin.l_addr.l_symndx |
| 1436 | == ((esym |
| 1437 | - (bfd_byte *) obj_coff_external_syms (abfd)) |
| 1438 | / symesz))) |
| 1439 | { |
| 1440 | bfd_byte *linpend, *linp; |
| 1441 | |
| 1442 | linpend = (reloc_info[enclosing->target_index].linenos |
| 1443 | + enclosing->lineno_count * linesz); |
| 1444 | for (linp = linpstart + linesz; |
| 1445 | linp < linpend; |
| 1446 | linp += linesz) |
| 1447 | { |
| 1448 | bfd_coff_swap_lineno_in (abfd, (void *) linp, |
| 1449 | (void *) &lin); |
| 1450 | if (lin.l_lnno == 0) |
| 1451 | break; |
| 1452 | } |
| 1453 | *lineno_counts = (linp - linpstart) / linesz; |
| 1454 | /* The setting of line_filepos will only be |
| 1455 | useful if all the line number entries for a |
| 1456 | csect are contiguous; this only matters for |
| 1457 | error reporting. */ |
| 1458 | if (csect->line_filepos == 0) |
| 1459 | csect->line_filepos = |
| 1460 | auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr; |
| 1461 | } |
| 1462 | } |
| 1463 | } |
| 1464 | } |
| 1465 | |
| 1466 | /* Pick up the csect auxiliary information. */ |
| 1467 | if (sym.n_numaux == 0) |
| 1468 | { |
| 1469 | _bfd_error_handler |
| 1470 | /* xgettext:c-format */ |
| 1471 | (_("%pB: class %d symbol `%s' has no aux entries"), |
| 1472 | abfd, sym.n_sclass, name); |
| 1473 | bfd_set_error (bfd_error_bad_value); |
| 1474 | goto error_return; |
| 1475 | } |
| 1476 | |
| 1477 | bfd_coff_swap_aux_in (abfd, |
| 1478 | (void *) (esym + symesz * sym.n_numaux), |
| 1479 | sym.n_type, sym.n_sclass, |
| 1480 | sym.n_numaux - 1, sym.n_numaux, |
| 1481 | (void *) &aux); |
| 1482 | |
| 1483 | smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp); |
| 1484 | |
| 1485 | section = NULL; |
| 1486 | value = 0; |
| 1487 | set_toc = NULL; |
| 1488 | |
| 1489 | switch (smtyp) |
| 1490 | { |
| 1491 | default: |
| 1492 | _bfd_error_handler |
| 1493 | /* xgettext:c-format */ |
| 1494 | (_("%pB: symbol `%s' has unrecognized csect type %d"), |
| 1495 | abfd, name, smtyp); |
| 1496 | bfd_set_error (bfd_error_bad_value); |
| 1497 | goto error_return; |
| 1498 | |
| 1499 | case XTY_ER: |
| 1500 | /* This is an external reference. */ |
| 1501 | if (sym.n_sclass == C_HIDEXT |
| 1502 | || sym.n_scnum != N_UNDEF |
| 1503 | || aux.x_csect.x_scnlen.l != 0) |
| 1504 | { |
| 1505 | _bfd_error_handler |
| 1506 | /* xgettext:c-format */ |
| 1507 | (_("%pB: bad XTY_ER symbol `%s': class %d scnum %d " |
| 1508 | "scnlen %" PRId64), |
| 1509 | abfd, name, sym.n_sclass, sym.n_scnum, |
| 1510 | (int64_t) aux.x_csect.x_scnlen.l); |
| 1511 | bfd_set_error (bfd_error_bad_value); |
| 1512 | goto error_return; |
| 1513 | } |
| 1514 | |
| 1515 | /* An XMC_XO external reference is actually a reference to |
| 1516 | an absolute location. */ |
| 1517 | if (aux.x_csect.x_smclas != XMC_XO) |
| 1518 | section = bfd_und_section_ptr; |
| 1519 | else |
| 1520 | { |
| 1521 | section = bfd_abs_section_ptr; |
| 1522 | value = sym.n_value; |
| 1523 | } |
| 1524 | break; |
| 1525 | |
| 1526 | case XTY_SD: |
| 1527 | csect = NULL; |
| 1528 | csect_index = -(unsigned) 1; |
| 1529 | |
| 1530 | /* When we see a TOC anchor, we record the TOC value. */ |
| 1531 | if (aux.x_csect.x_smclas == XMC_TC0) |
| 1532 | { |
| 1533 | if (sym.n_sclass != C_HIDEXT |
| 1534 | || aux.x_csect.x_scnlen.l != 0) |
| 1535 | { |
| 1536 | _bfd_error_handler |
| 1537 | /* xgettext:c-format */ |
| 1538 | (_("%pB: XMC_TC0 symbol `%s' is class %d scnlen %" PRId64), |
| 1539 | abfd, name, sym.n_sclass, (int64_t) aux.x_csect.x_scnlen.l); |
| 1540 | bfd_set_error (bfd_error_bad_value); |
| 1541 | goto error_return; |
| 1542 | } |
| 1543 | xcoff_data (abfd)->toc = sym.n_value; |
| 1544 | } |
| 1545 | |
| 1546 | /* We must merge TOC entries for the same symbol. We can |
| 1547 | merge two TOC entries if they are both C_HIDEXT, they |
| 1548 | both have the same name, they are both 4 or 8 bytes long, and |
| 1549 | they both have a relocation table entry for an external |
| 1550 | symbol with the same name. Unfortunately, this means |
| 1551 | that we must look through the relocations. Ick. |
| 1552 | |
| 1553 | Logic for 32 bit vs 64 bit. |
| 1554 | 32 bit has a csect length of 4 for TOC |
| 1555 | 64 bit has a csect length of 8 for TOC |
| 1556 | |
| 1557 | The conditions to get past the if-check are not that bad. |
| 1558 | They are what is used to create the TOC csects in the first |
| 1559 | place. */ |
| 1560 | if (aux.x_csect.x_smclas == XMC_TC |
| 1561 | && sym.n_sclass == C_HIDEXT |
| 1562 | && info->output_bfd->xvec == abfd->xvec |
| 1563 | && ((bfd_xcoff_is_xcoff32 (abfd) |
| 1564 | && aux.x_csect.x_scnlen.l == 4) |
| 1565 | || (bfd_xcoff_is_xcoff64 (abfd) |
| 1566 | && aux.x_csect.x_scnlen.l == 8))) |
| 1567 | { |
| 1568 | asection *enclosing; |
| 1569 | struct internal_reloc *relocs; |
| 1570 | bfd_size_type relindx; |
| 1571 | struct internal_reloc *rel; |
| 1572 | |
| 1573 | enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum); |
| 1574 | if (enclosing == NULL) |
| 1575 | goto error_return; |
| 1576 | |
| 1577 | relocs = reloc_info[enclosing->target_index].relocs; |
| 1578 | amt = enclosing->reloc_count; |
| 1579 | relindx = xcoff_find_reloc (relocs, amt, sym.n_value); |
| 1580 | rel = relocs + relindx; |
| 1581 | |
| 1582 | /* 32 bit R_POS r_size is 31 |
| 1583 | 64 bit R_POS r_size is 63 */ |
| 1584 | if (relindx < enclosing->reloc_count |
| 1585 | && rel->r_vaddr == (bfd_vma) sym.n_value |
| 1586 | && rel->r_type == R_POS |
| 1587 | && ((bfd_xcoff_is_xcoff32 (abfd) |
| 1588 | && rel->r_size == 31) |
| 1589 | || (bfd_xcoff_is_xcoff64 (abfd) |
| 1590 | && rel->r_size == 63))) |
| 1591 | { |
| 1592 | bfd_byte *erelsym; |
| 1593 | |
| 1594 | struct internal_syment relsym; |
| 1595 | |
| 1596 | erelsym = ((bfd_byte *) obj_coff_external_syms (abfd) |
| 1597 | + rel->r_symndx * symesz); |
| 1598 | bfd_coff_swap_sym_in (abfd, (void *) erelsym, (void *) &relsym); |
| 1599 | if (EXTERN_SYM_P (relsym.n_sclass)) |
| 1600 | { |
| 1601 | const char *relname; |
| 1602 | char relbuf[SYMNMLEN + 1]; |
| 1603 | bfd_boolean copy; |
| 1604 | struct xcoff_link_hash_entry *h; |
| 1605 | |
| 1606 | /* At this point we know that the TOC entry is |
| 1607 | for an externally visible symbol. */ |
| 1608 | relname = _bfd_coff_internal_syment_name (abfd, &relsym, |
| 1609 | relbuf); |
| 1610 | if (relname == NULL) |
| 1611 | goto error_return; |
| 1612 | |
| 1613 | /* We only merge TOC entries if the TC name is |
| 1614 | the same as the symbol name. This handles |
| 1615 | the normal case, but not common cases like |
| 1616 | SYM.P4 which gcc generates to store SYM + 4 |
| 1617 | in the TOC. FIXME. */ |
| 1618 | if (strcmp (name, relname) == 0) |
| 1619 | { |
| 1620 | copy = (! info->keep_memory |
| 1621 | || relsym._n._n_n._n_zeroes != 0 |
| 1622 | || relsym._n._n_n._n_offset == 0); |
| 1623 | h = xcoff_link_hash_lookup (xcoff_hash_table (info), |
| 1624 | relname, TRUE, copy, |
| 1625 | FALSE); |
| 1626 | if (h == NULL) |
| 1627 | goto error_return; |
| 1628 | |
| 1629 | /* At this point h->root.type could be |
| 1630 | bfd_link_hash_new. That should be OK, |
| 1631 | since we know for sure that we will come |
| 1632 | across this symbol as we step through the |
| 1633 | file. */ |
| 1634 | |
| 1635 | /* We store h in *sym_hash for the |
| 1636 | convenience of the relocate_section |
| 1637 | function. */ |
| 1638 | *sym_hash = h; |
| 1639 | |
| 1640 | if (h->toc_section != NULL) |
| 1641 | { |
| 1642 | asection **rel_csects; |
| 1643 | |
| 1644 | /* We already have a TOC entry for this |
| 1645 | symbol, so we can just ignore this |
| 1646 | one. */ |
| 1647 | rel_csects = |
| 1648 | reloc_info[enclosing->target_index].csects; |
| 1649 | rel_csects[relindx] = bfd_und_section_ptr; |
| 1650 | break; |
| 1651 | } |
| 1652 | |
| 1653 | /* We are about to create a TOC entry for |
| 1654 | this symbol. */ |
| 1655 | set_toc = h; |
| 1656 | } |
| 1657 | } |
| 1658 | } |
| 1659 | } |
| 1660 | |
| 1661 | { |
| 1662 | asection *enclosing; |
| 1663 | |
| 1664 | /* We need to create a new section. We get the name from |
| 1665 | the csect storage mapping class, so that the linker can |
| 1666 | accumulate similar csects together. */ |
| 1667 | |
| 1668 | csect = bfd_xcoff_create_csect_from_smclas(abfd, &aux, name); |
| 1669 | if (NULL == csect) |
| 1670 | goto error_return; |
| 1671 | |
| 1672 | /* The enclosing section is the main section : .data, .text |
| 1673 | or .bss that the csect is coming from. */ |
| 1674 | enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum); |
| 1675 | if (enclosing == NULL) |
| 1676 | goto error_return; |
| 1677 | |
| 1678 | if (! bfd_is_abs_section (enclosing) |
| 1679 | && ((bfd_vma) sym.n_value < enclosing->vma |
| 1680 | || ((bfd_vma) sym.n_value + aux.x_csect.x_scnlen.l |
| 1681 | > enclosing->vma + enclosing->size))) |
| 1682 | { |
| 1683 | _bfd_error_handler |
| 1684 | /* xgettext:c-format */ |
| 1685 | (_("%pB: csect `%s' not in enclosing section"), |
| 1686 | abfd, name); |
| 1687 | bfd_set_error (bfd_error_bad_value); |
| 1688 | goto error_return; |
| 1689 | } |
| 1690 | csect->vma = sym.n_value; |
| 1691 | csect->filepos = (enclosing->filepos |
| 1692 | + sym.n_value |
| 1693 | - enclosing->vma); |
| 1694 | csect->size = aux.x_csect.x_scnlen.l; |
| 1695 | csect->flags |= SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; |
| 1696 | csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp); |
| 1697 | |
| 1698 | /* Record the enclosing section in the tdata for this new |
| 1699 | section. */ |
| 1700 | amt = sizeof (struct coff_section_tdata); |
| 1701 | csect->used_by_bfd = bfd_zalloc (abfd, amt); |
| 1702 | if (csect->used_by_bfd == NULL) |
| 1703 | goto error_return; |
| 1704 | amt = sizeof (struct xcoff_section_tdata); |
| 1705 | coff_section_data (abfd, csect)->tdata = bfd_zalloc (abfd, amt); |
| 1706 | if (coff_section_data (abfd, csect)->tdata == NULL) |
| 1707 | goto error_return; |
| 1708 | xcoff_section_data (abfd, csect)->enclosing = enclosing; |
| 1709 | xcoff_section_data (abfd, csect)->lineno_count = |
| 1710 | enclosing->lineno_count; |
| 1711 | |
| 1712 | if (enclosing->owner == abfd) |
| 1713 | { |
| 1714 | struct internal_reloc *relocs; |
| 1715 | bfd_size_type relindx; |
| 1716 | struct internal_reloc *rel; |
| 1717 | asection **rel_csect; |
| 1718 | |
| 1719 | relocs = reloc_info[enclosing->target_index].relocs; |
| 1720 | amt = enclosing->reloc_count; |
| 1721 | relindx = xcoff_find_reloc (relocs, amt, csect->vma); |
| 1722 | |
| 1723 | rel = relocs + relindx; |
| 1724 | rel_csect = (reloc_info[enclosing->target_index].csects |
| 1725 | + relindx); |
| 1726 | |
| 1727 | csect->rel_filepos = (enclosing->rel_filepos |
| 1728 | + relindx * bfd_coff_relsz (abfd)); |
| 1729 | while (relindx < enclosing->reloc_count |
| 1730 | && *rel_csect == NULL |
| 1731 | && rel->r_vaddr < csect->vma + csect->size) |
| 1732 | { |
| 1733 | |
| 1734 | *rel_csect = csect; |
| 1735 | csect->flags |= SEC_RELOC; |
| 1736 | ++csect->reloc_count; |
| 1737 | ++relindx; |
| 1738 | ++rel; |
| 1739 | ++rel_csect; |
| 1740 | } |
| 1741 | } |
| 1742 | |
| 1743 | /* There are a number of other fields and section flags |
| 1744 | which we do not bother to set. */ |
| 1745 | |
| 1746 | csect_index = ((esym |
| 1747 | - (bfd_byte *) obj_coff_external_syms (abfd)) |
| 1748 | / symesz); |
| 1749 | |
| 1750 | xcoff_section_data (abfd, csect)->first_symndx = csect_index; |
| 1751 | |
| 1752 | if (first_csect == NULL) |
| 1753 | first_csect = csect; |
| 1754 | |
| 1755 | /* If this symbol is external, we treat it as starting at the |
| 1756 | beginning of the newly created section. */ |
| 1757 | if (EXTERN_SYM_P (sym.n_sclass)) |
| 1758 | { |
| 1759 | section = csect; |
| 1760 | value = 0; |
| 1761 | } |
| 1762 | |
| 1763 | /* If this is a TOC section for a symbol, record it. */ |
| 1764 | if (set_toc != NULL) |
| 1765 | set_toc->toc_section = csect; |
| 1766 | } |
| 1767 | break; |
| 1768 | |
| 1769 | case XTY_LD: |
| 1770 | /* This is a label definition. The x_scnlen field is the |
| 1771 | symbol index of the csect. Usually the XTY_LD symbol will |
| 1772 | follow its appropriate XTY_SD symbol. The .set pseudo op can |
| 1773 | cause the XTY_LD to not follow the XTY_SD symbol. */ |
| 1774 | { |
| 1775 | bfd_boolean bad; |
| 1776 | |
| 1777 | bad = FALSE; |
| 1778 | if (aux.x_csect.x_scnlen.l < 0 |
| 1779 | || (aux.x_csect.x_scnlen.l |
| 1780 | >= esym - (bfd_byte *) obj_coff_external_syms (abfd))) |
| 1781 | bad = TRUE; |
| 1782 | if (! bad) |
| 1783 | { |
| 1784 | section = xcoff_data (abfd)->csects[aux.x_csect.x_scnlen.l]; |
| 1785 | if (section == NULL |
| 1786 | || (section->flags & SEC_HAS_CONTENTS) == 0) |
| 1787 | bad = TRUE; |
| 1788 | } |
| 1789 | if (bad) |
| 1790 | { |
| 1791 | _bfd_error_handler |
| 1792 | /* xgettext:c-format */ |
| 1793 | (_("%pB: misplaced XTY_LD `%s'"), |
| 1794 | abfd, name); |
| 1795 | bfd_set_error (bfd_error_bad_value); |
| 1796 | goto error_return; |
| 1797 | } |
| 1798 | csect = section; |
| 1799 | value = sym.n_value - csect->vma; |
| 1800 | } |
| 1801 | break; |
| 1802 | |
| 1803 | case XTY_CM: |
| 1804 | /* This is an unitialized csect. We could base the name on |
| 1805 | the storage mapping class, but we don't bother except for |
| 1806 | an XMC_TD symbol. If this csect is externally visible, |
| 1807 | it is a common symbol. We put XMC_TD symbols in sections |
| 1808 | named .tocbss, and rely on the linker script to put that |
| 1809 | in the TOC area. */ |
| 1810 | |
| 1811 | if (aux.x_csect.x_smclas == XMC_TD) |
| 1812 | { |
| 1813 | /* The linker script puts the .td section in the data |
| 1814 | section after the .tc section. */ |
| 1815 | csect = bfd_make_section_anyway_with_flags (abfd, ".td", |
| 1816 | SEC_ALLOC); |
| 1817 | } |
| 1818 | else |
| 1819 | csect = bfd_make_section_anyway_with_flags (abfd, ".bss", |
| 1820 | SEC_ALLOC); |
| 1821 | |
| 1822 | if (csect == NULL) |
| 1823 | goto error_return; |
| 1824 | csect->vma = sym.n_value; |
| 1825 | csect->size = aux.x_csect.x_scnlen.l; |
| 1826 | csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp); |
| 1827 | /* There are a number of other fields and section flags |
| 1828 | which we do not bother to set. */ |
| 1829 | |
| 1830 | csect_index = ((esym |
| 1831 | - (bfd_byte *) obj_coff_external_syms (abfd)) |
| 1832 | / symesz); |
| 1833 | |
| 1834 | amt = sizeof (struct coff_section_tdata); |
| 1835 | csect->used_by_bfd = bfd_zalloc (abfd, amt); |
| 1836 | if (csect->used_by_bfd == NULL) |
| 1837 | goto error_return; |
| 1838 | amt = sizeof (struct xcoff_section_tdata); |
| 1839 | coff_section_data (abfd, csect)->tdata = bfd_zalloc (abfd, amt); |
| 1840 | if (coff_section_data (abfd, csect)->tdata == NULL) |
| 1841 | goto error_return; |
| 1842 | xcoff_section_data (abfd, csect)->first_symndx = csect_index; |
| 1843 | |
| 1844 | if (first_csect == NULL) |
| 1845 | first_csect = csect; |
| 1846 | |
| 1847 | if (EXTERN_SYM_P (sym.n_sclass)) |
| 1848 | { |
| 1849 | csect->flags |= SEC_IS_COMMON; |
| 1850 | csect->size = 0; |
| 1851 | section = csect; |
| 1852 | value = aux.x_csect.x_scnlen.l; |
| 1853 | } |
| 1854 | |
| 1855 | break; |
| 1856 | } |
| 1857 | |
| 1858 | /* Check for magic symbol names. */ |
| 1859 | if ((smtyp == XTY_SD || smtyp == XTY_CM) |
| 1860 | && aux.x_csect.x_smclas != XMC_TC |
| 1861 | && aux.x_csect.x_smclas != XMC_TD) |
| 1862 | { |
| 1863 | int i = -1; |
| 1864 | |
| 1865 | if (name[0] == '_') |
| 1866 | { |
| 1867 | if (strcmp (name, "_text") == 0) |
| 1868 | i = XCOFF_SPECIAL_SECTION_TEXT; |
| 1869 | else if (strcmp (name, "_etext") == 0) |
| 1870 | i = XCOFF_SPECIAL_SECTION_ETEXT; |
| 1871 | else if (strcmp (name, "_data") == 0) |
| 1872 | i = XCOFF_SPECIAL_SECTION_DATA; |
| 1873 | else if (strcmp (name, "_edata") == 0) |
| 1874 | i = XCOFF_SPECIAL_SECTION_EDATA; |
| 1875 | else if (strcmp (name, "_end") == 0) |
| 1876 | i = XCOFF_SPECIAL_SECTION_END; |
| 1877 | } |
| 1878 | else if (name[0] == 'e' && strcmp (name, "end") == 0) |
| 1879 | i = XCOFF_SPECIAL_SECTION_END2; |
| 1880 | |
| 1881 | if (i != -1) |
| 1882 | xcoff_hash_table (info)->special_sections[i] = csect; |
| 1883 | } |
| 1884 | |
| 1885 | /* Now we have enough information to add the symbol to the |
| 1886 | linker hash table. */ |
| 1887 | |
| 1888 | if (EXTERN_SYM_P (sym.n_sclass)) |
| 1889 | { |
| 1890 | bfd_boolean copy, ok; |
| 1891 | flagword flags; |
| 1892 | |
| 1893 | BFD_ASSERT (section != NULL); |
| 1894 | |
| 1895 | /* We must copy the name into memory if we got it from the |
| 1896 | syment itself, rather than the string table. */ |
| 1897 | copy = default_copy; |
| 1898 | if (sym._n._n_n._n_zeroes != 0 |
| 1899 | || sym._n._n_n._n_offset == 0) |
| 1900 | copy = TRUE; |
| 1901 | |
| 1902 | /* Ignore global linkage code when linking statically. */ |
| 1903 | if (info->static_link |
| 1904 | && (smtyp == XTY_SD || smtyp == XTY_LD) |
| 1905 | && aux.x_csect.x_smclas == XMC_GL) |
| 1906 | { |
| 1907 | section = bfd_und_section_ptr; |
| 1908 | value = 0; |
| 1909 | } |
| 1910 | |
| 1911 | /* The AIX linker appears to only detect multiple symbol |
| 1912 | definitions when there is a reference to the symbol. If |
| 1913 | a symbol is defined multiple times, and the only |
| 1914 | references are from the same object file, the AIX linker |
| 1915 | appears to permit it. It does not merge the different |
| 1916 | definitions, but handles them independently. On the |
| 1917 | other hand, if there is a reference, the linker reports |
| 1918 | an error. |
| 1919 | |
| 1920 | This matters because the AIX <net/net_globals.h> header |
| 1921 | file actually defines an initialized array, so we have to |
| 1922 | actually permit that to work. |
| 1923 | |
| 1924 | Just to make matters even more confusing, the AIX linker |
| 1925 | appears to permit multiple symbol definitions whenever |
| 1926 | the second definition is in an archive rather than an |
| 1927 | object file. This may be a consequence of the manner in |
| 1928 | which it handles archives: I think it may load the entire |
| 1929 | archive in as separate csects, and then let garbage |
| 1930 | collection discard symbols. |
| 1931 | |
| 1932 | We also have to handle the case of statically linking a |
| 1933 | shared object, which will cause symbol redefinitions, |
| 1934 | although this is an easier case to detect. */ |
| 1935 | else if (info->output_bfd->xvec == abfd->xvec) |
| 1936 | { |
| 1937 | if (! bfd_is_und_section (section)) |
| 1938 | *sym_hash = xcoff_link_hash_lookup (xcoff_hash_table (info), |
| 1939 | name, TRUE, copy, FALSE); |
| 1940 | else |
| 1941 | /* Make a copy of the symbol name to prevent problems with |
| 1942 | merging symbols. */ |
| 1943 | *sym_hash = ((struct xcoff_link_hash_entry *) |
| 1944 | bfd_wrapped_link_hash_lookup (abfd, info, name, |
| 1945 | TRUE, TRUE, FALSE)); |
| 1946 | |
| 1947 | if (*sym_hash == NULL) |
| 1948 | goto error_return; |
| 1949 | if (((*sym_hash)->root.type == bfd_link_hash_defined |
| 1950 | || (*sym_hash)->root.type == bfd_link_hash_defweak) |
| 1951 | && ! bfd_is_und_section (section) |
| 1952 | && ! bfd_is_com_section (section)) |
| 1953 | { |
| 1954 | /* This is a second definition of a defined symbol. */ |
| 1955 | if (((*sym_hash)->flags & XCOFF_DEF_REGULAR) == 0 |
| 1956 | && ((*sym_hash)->flags & XCOFF_DEF_DYNAMIC) != 0) |
| 1957 | { |
| 1958 | /* The existing symbol is from a shared library. |
| 1959 | Replace it. */ |
| 1960 | (*sym_hash)->root.type = bfd_link_hash_undefined; |
| 1961 | (*sym_hash)->root.u.undef.abfd = |
| 1962 | (*sym_hash)->root.u.def.section->owner; |
| 1963 | } |
| 1964 | else if (abfd->my_archive != NULL) |
| 1965 | { |
| 1966 | /* This is a redefinition in an object contained |
| 1967 | in an archive. Just ignore it. See the |
| 1968 | comment above. */ |
| 1969 | section = bfd_und_section_ptr; |
| 1970 | value = 0; |
| 1971 | } |
| 1972 | else if (sym.n_sclass == C_AIX_WEAKEXT |
| 1973 | || (*sym_hash)->root.type == bfd_link_hash_defweak) |
| 1974 | { |
| 1975 | /* At least one of the definitions is weak. |
| 1976 | Allow the normal rules to take effect. */ |
| 1977 | } |
| 1978 | else if ((*sym_hash)->root.u.undef.next != NULL |
| 1979 | || info->hash->undefs_tail == &(*sym_hash)->root) |
| 1980 | { |
| 1981 | /* This symbol has been referenced. In this |
| 1982 | case, we just continue and permit the |
| 1983 | multiple definition error. See the comment |
| 1984 | above about the behaviour of the AIX linker. */ |
| 1985 | } |
| 1986 | else if ((*sym_hash)->smclas == aux.x_csect.x_smclas) |
| 1987 | { |
| 1988 | /* The symbols are both csects of the same |
| 1989 | class. There is at least a chance that this |
| 1990 | is a semi-legitimate redefinition. */ |
| 1991 | section = bfd_und_section_ptr; |
| 1992 | value = 0; |
| 1993 | (*sym_hash)->flags |= XCOFF_MULTIPLY_DEFINED; |
| 1994 | } |
| 1995 | } |
| 1996 | else if (((*sym_hash)->flags & XCOFF_MULTIPLY_DEFINED) != 0 |
| 1997 | && (*sym_hash)->root.type == bfd_link_hash_defined |
| 1998 | && (bfd_is_und_section (section) |
| 1999 | || bfd_is_com_section (section))) |
| 2000 | { |
| 2001 | /* This is a reference to a multiply defined symbol. |
| 2002 | Report the error now. See the comment above |
| 2003 | about the behaviour of the AIX linker. We could |
| 2004 | also do this with warning symbols, but I'm not |
| 2005 | sure the XCOFF linker is wholly prepared to |
| 2006 | handle them, and that would only be a warning, |
| 2007 | not an error. */ |
| 2008 | (*info->callbacks->multiple_definition) (info, |
| 2009 | &(*sym_hash)->root, |
| 2010 | NULL, NULL, |
| 2011 | (bfd_vma) 0); |
| 2012 | /* Try not to give this error too many times. */ |
| 2013 | (*sym_hash)->flags &= ~XCOFF_MULTIPLY_DEFINED; |
| 2014 | } |
| 2015 | } |
| 2016 | |
| 2017 | /* _bfd_generic_link_add_one_symbol may call the linker to |
| 2018 | generate an error message, and the linker may try to read |
| 2019 | the symbol table to give a good error. Right now, the |
| 2020 | line numbers are in an inconsistent state, since they are |
| 2021 | counted both in the real sections and in the new csects. |
| 2022 | We need to leave the count in the real sections so that |
| 2023 | the linker can report the line number of the error |
| 2024 | correctly, so temporarily clobber the link to the csects |
| 2025 | so that the linker will not try to read the line numbers |
| 2026 | a second time from the csects. */ |
| 2027 | BFD_ASSERT (last_real->next == first_csect); |
| 2028 | last_real->next = NULL; |
| 2029 | flags = (sym.n_sclass == C_EXT ? BSF_GLOBAL : BSF_WEAK); |
| 2030 | ok = (_bfd_generic_link_add_one_symbol |
| 2031 | (info, abfd, name, flags, section, value, NULL, copy, TRUE, |
| 2032 | (struct bfd_link_hash_entry **) sym_hash)); |
| 2033 | last_real->next = first_csect; |
| 2034 | if (!ok) |
| 2035 | goto error_return; |
| 2036 | |
| 2037 | if (smtyp == XTY_CM) |
| 2038 | { |
| 2039 | if ((*sym_hash)->root.type != bfd_link_hash_common |
| 2040 | || (*sym_hash)->root.u.c.p->section != csect) |
| 2041 | /* We don't need the common csect we just created. */ |
| 2042 | csect->size = 0; |
| 2043 | else |
| 2044 | (*sym_hash)->root.u.c.p->alignment_power |
| 2045 | = csect->alignment_power; |
| 2046 | } |
| 2047 | |
| 2048 | if (info->output_bfd->xvec == abfd->xvec) |
| 2049 | { |
| 2050 | int flag; |
| 2051 | |
| 2052 | if (smtyp == XTY_ER |
| 2053 | || smtyp == XTY_CM |
| 2054 | || section == bfd_und_section_ptr) |
| 2055 | flag = XCOFF_REF_REGULAR; |
| 2056 | else |
| 2057 | flag = XCOFF_DEF_REGULAR; |
| 2058 | (*sym_hash)->flags |= flag; |
| 2059 | |
| 2060 | if ((*sym_hash)->smclas == XMC_UA |
| 2061 | || flag == XCOFF_DEF_REGULAR) |
| 2062 | (*sym_hash)->smclas = aux.x_csect.x_smclas; |
| 2063 | } |
| 2064 | } |
| 2065 | |
| 2066 | if (smtyp == XTY_ER) |
| 2067 | *csect_cache = section; |
| 2068 | else |
| 2069 | { |
| 2070 | *csect_cache = csect; |
| 2071 | if (csect != NULL) |
| 2072 | xcoff_section_data (abfd, csect)->last_symndx |
| 2073 | = (esym - (bfd_byte *) obj_coff_external_syms (abfd)) / symesz; |
| 2074 | } |
| 2075 | |
| 2076 | esym += (sym.n_numaux + 1) * symesz; |
| 2077 | sym_hash += sym.n_numaux + 1; |
| 2078 | csect_cache += sym.n_numaux + 1; |
| 2079 | lineno_counts += sym.n_numaux + 1; |
| 2080 | } |
| 2081 | |
| 2082 | BFD_ASSERT (last_real == NULL || last_real->next == first_csect); |
| 2083 | |
| 2084 | /* Make sure that we have seen all the relocs. */ |
| 2085 | for (o = abfd->sections; o != first_csect; o = o->next) |
| 2086 | { |
| 2087 | /* Debugging sections have no csects. */ |
| 2088 | if (bfd_section_flags (o) & SEC_DEBUGGING) |
| 2089 | continue; |
| 2090 | |
| 2091 | /* Reset the section size and the line number count, since the |
| 2092 | data is now attached to the csects. Don't reset the size of |
| 2093 | the .debug section, since we need to read it below in |
| 2094 | bfd_xcoff_size_dynamic_sections. */ |
| 2095 | if (strcmp (bfd_section_name (o), ".debug") != 0) |
| 2096 | o->size = 0; |
| 2097 | o->lineno_count = 0; |
| 2098 | |
| 2099 | if ((o->flags & SEC_RELOC) != 0) |
| 2100 | { |
| 2101 | bfd_size_type i; |
| 2102 | struct internal_reloc *rel; |
| 2103 | asection **rel_csect; |
| 2104 | |
| 2105 | rel = reloc_info[o->target_index].relocs; |
| 2106 | rel_csect = reloc_info[o->target_index].csects; |
| 2107 | |
| 2108 | for (i = 0; i < o->reloc_count; i++, rel++, rel_csect++) |
| 2109 | { |
| 2110 | if (*rel_csect == NULL) |
| 2111 | { |
| 2112 | _bfd_error_handler |
| 2113 | /* xgettext:c-format */ |
| 2114 | (_("%pB: reloc %s:%" PRId64 " not in csect"), |
| 2115 | abfd, o->name, (int64_t) i); |
| 2116 | bfd_set_error (bfd_error_bad_value); |
| 2117 | goto error_return; |
| 2118 | } |
| 2119 | |
| 2120 | /* We identify all function symbols that are the target |
| 2121 | of a relocation, so that we can create glue code for |
| 2122 | functions imported from dynamic objects. */ |
| 2123 | if (info->output_bfd->xvec == abfd->xvec |
| 2124 | && *rel_csect != bfd_und_section_ptr |
| 2125 | && obj_xcoff_sym_hashes (abfd)[rel->r_symndx] != NULL) |
| 2126 | { |
| 2127 | struct xcoff_link_hash_entry *h; |
| 2128 | |
| 2129 | h = obj_xcoff_sym_hashes (abfd)[rel->r_symndx]; |
| 2130 | /* If the symbol name starts with a period, it is |
| 2131 | the code of a function. If the symbol is |
| 2132 | currently undefined, then add an undefined symbol |
| 2133 | for the function descriptor. This should do no |
| 2134 | harm, because any regular object that defines the |
| 2135 | function should also define the function |
| 2136 | descriptor. It helps, because it means that we |
| 2137 | will identify the function descriptor with a |
| 2138 | dynamic object if a dynamic object defines it. */ |
| 2139 | if (h->root.root.string[0] == '.' |
| 2140 | && h->descriptor == NULL) |
| 2141 | { |
| 2142 | struct xcoff_link_hash_entry *hds; |
| 2143 | struct bfd_link_hash_entry *bh; |
| 2144 | |
| 2145 | hds = xcoff_link_hash_lookup (xcoff_hash_table (info), |
| 2146 | h->root.root.string + 1, |
| 2147 | TRUE, FALSE, TRUE); |
| 2148 | if (hds == NULL) |
| 2149 | goto error_return; |
| 2150 | if (hds->root.type == bfd_link_hash_new) |
| 2151 | { |
| 2152 | bh = &hds->root; |
| 2153 | if (! (_bfd_generic_link_add_one_symbol |
| 2154 | (info, abfd, hds->root.root.string, |
| 2155 | (flagword) 0, bfd_und_section_ptr, |
| 2156 | (bfd_vma) 0, NULL, FALSE, |
| 2157 | TRUE, &bh))) |
| 2158 | goto error_return; |
| 2159 | hds = (struct xcoff_link_hash_entry *) bh; |
| 2160 | } |
| 2161 | hds->flags |= XCOFF_DESCRIPTOR; |
| 2162 | BFD_ASSERT ((h->flags & XCOFF_DESCRIPTOR) == 0); |
| 2163 | hds->descriptor = h; |
| 2164 | h->descriptor = hds; |
| 2165 | } |
| 2166 | if (h->root.root.string[0] == '.') |
| 2167 | h->flags |= XCOFF_CALLED; |
| 2168 | } |
| 2169 | } |
| 2170 | |
| 2171 | free (reloc_info[o->target_index].csects); |
| 2172 | reloc_info[o->target_index].csects = NULL; |
| 2173 | |
| 2174 | /* Reset SEC_RELOC and the reloc_count, since the reloc |
| 2175 | information is now attached to the csects. */ |
| 2176 | o->flags &=~ SEC_RELOC; |
| 2177 | o->reloc_count = 0; |
| 2178 | |
| 2179 | /* If we are not keeping memory, free the reloc information. */ |
| 2180 | if (! info->keep_memory |
| 2181 | && coff_section_data (abfd, o) != NULL |
| 2182 | && coff_section_data (abfd, o)->relocs != NULL |
| 2183 | && ! coff_section_data (abfd, o)->keep_relocs) |
| 2184 | { |
| 2185 | free (coff_section_data (abfd, o)->relocs); |
| 2186 | coff_section_data (abfd, o)->relocs = NULL; |
| 2187 | } |
| 2188 | } |
| 2189 | |
| 2190 | /* Free up the line numbers. FIXME: We could cache these |
| 2191 | somewhere for the final link, to avoid reading them again. */ |
| 2192 | if (reloc_info[o->target_index].linenos != NULL) |
| 2193 | { |
| 2194 | free (reloc_info[o->target_index].linenos); |
| 2195 | reloc_info[o->target_index].linenos = NULL; |
| 2196 | } |
| 2197 | } |
| 2198 | |
| 2199 | free (reloc_info); |
| 2200 | |
| 2201 | obj_coff_keep_syms (abfd) = keep_syms; |
| 2202 | |
| 2203 | return TRUE; |
| 2204 | |
| 2205 | error_return: |
| 2206 | if (reloc_info != NULL) |
| 2207 | { |
| 2208 | for (o = abfd->sections; o != NULL; o = o->next) |
| 2209 | { |
| 2210 | if (reloc_info[o->target_index].csects != NULL) |
| 2211 | free (reloc_info[o->target_index].csects); |
| 2212 | if (reloc_info[o->target_index].linenos != NULL) |
| 2213 | free (reloc_info[o->target_index].linenos); |
| 2214 | } |
| 2215 | free (reloc_info); |
| 2216 | } |
| 2217 | obj_coff_keep_syms (abfd) = keep_syms; |
| 2218 | return FALSE; |
| 2219 | } |
| 2220 | |
| 2221 | #undef N_TMASK |
| 2222 | #undef N_BTSHFT |
| 2223 | |
| 2224 | /* Add symbols from an XCOFF object file. */ |
| 2225 | |
| 2226 | static bfd_boolean |
| 2227 | xcoff_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info) |
| 2228 | { |
| 2229 | if (! _bfd_coff_get_external_symbols (abfd)) |
| 2230 | return FALSE; |
| 2231 | if (! xcoff_link_add_symbols (abfd, info)) |
| 2232 | return FALSE; |
| 2233 | if (! info->keep_memory) |
| 2234 | { |
| 2235 | if (! _bfd_coff_free_symbols (abfd)) |
| 2236 | return FALSE; |
| 2237 | } |
| 2238 | return TRUE; |
| 2239 | } |
| 2240 | |
| 2241 | /* Look through the loader symbols to see if this dynamic object |
| 2242 | should be included in the link. The native linker uses the loader |
| 2243 | symbols, not the normal symbol table, so we do too. */ |
| 2244 | |
| 2245 | static bfd_boolean |
| 2246 | xcoff_link_check_dynamic_ar_symbols (bfd *abfd, |
| 2247 | struct bfd_link_info *info, |
| 2248 | bfd_boolean *pneeded, |
| 2249 | bfd **subsbfd) |
| 2250 | { |
| 2251 | asection *lsec; |
| 2252 | bfd_byte *contents; |
| 2253 | struct internal_ldhdr ldhdr; |
| 2254 | const char *strings; |
| 2255 | bfd_byte *elsym, *elsymend; |
| 2256 | |
| 2257 | *pneeded = FALSE; |
| 2258 | |
| 2259 | lsec = bfd_get_section_by_name (abfd, ".loader"); |
| 2260 | if (lsec == NULL) |
| 2261 | /* There are no symbols, so don't try to include it. */ |
| 2262 | return TRUE; |
| 2263 | |
| 2264 | if (! xcoff_get_section_contents (abfd, lsec)) |
| 2265 | return FALSE; |
| 2266 | contents = coff_section_data (abfd, lsec)->contents; |
| 2267 | |
| 2268 | bfd_xcoff_swap_ldhdr_in (abfd, contents, &ldhdr); |
| 2269 | |
| 2270 | strings = (char *) contents + ldhdr.l_stoff; |
| 2271 | |
| 2272 | elsym = contents + bfd_xcoff_loader_symbol_offset (abfd, &ldhdr); |
| 2273 | |
| 2274 | elsymend = elsym + ldhdr.l_nsyms * bfd_xcoff_ldsymsz (abfd); |
| 2275 | for (; elsym < elsymend; elsym += bfd_xcoff_ldsymsz (abfd)) |
| 2276 | { |
| 2277 | struct internal_ldsym ldsym; |
| 2278 | char nambuf[SYMNMLEN + 1]; |
| 2279 | const char *name; |
| 2280 | struct bfd_link_hash_entry *h; |
| 2281 | |
| 2282 | bfd_xcoff_swap_ldsym_in (abfd, elsym, &ldsym); |
| 2283 | |
| 2284 | /* We are only interested in exported symbols. */ |
| 2285 | if ((ldsym.l_smtype & L_EXPORT) == 0) |
| 2286 | continue; |
| 2287 | |
| 2288 | if (ldsym._l._l_l._l_zeroes == 0) |
| 2289 | name = strings + ldsym._l._l_l._l_offset; |
| 2290 | else |
| 2291 | { |
| 2292 | memcpy (nambuf, ldsym._l._l_name, SYMNMLEN); |
| 2293 | nambuf[SYMNMLEN] = '\0'; |
| 2294 | name = nambuf; |
| 2295 | } |
| 2296 | |
| 2297 | h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); |
| 2298 | |
| 2299 | /* We are only interested in symbols that are currently |
| 2300 | undefined. At this point we know that we are using an XCOFF |
| 2301 | hash table. */ |
| 2302 | if (h != NULL |
| 2303 | && h->type == bfd_link_hash_undefined |
| 2304 | && (((struct xcoff_link_hash_entry *) h)->flags |
| 2305 | & XCOFF_DEF_DYNAMIC) == 0) |
| 2306 | { |
| 2307 | if (!(*info->callbacks |
| 2308 | ->add_archive_element) (info, abfd, name, subsbfd)) |
| 2309 | continue; |
| 2310 | *pneeded = TRUE; |
| 2311 | return TRUE; |
| 2312 | } |
| 2313 | } |
| 2314 | |
| 2315 | /* We do not need this shared object. */ |
| 2316 | if (contents != NULL && ! coff_section_data (abfd, lsec)->keep_contents) |
| 2317 | { |
| 2318 | free (coff_section_data (abfd, lsec)->contents); |
| 2319 | coff_section_data (abfd, lsec)->contents = NULL; |
| 2320 | } |
| 2321 | |
| 2322 | return TRUE; |
| 2323 | } |
| 2324 | |
| 2325 | /* Look through the symbols to see if this object file should be |
| 2326 | included in the link. */ |
| 2327 | |
| 2328 | static bfd_boolean |
| 2329 | xcoff_link_check_ar_symbols (bfd *abfd, |
| 2330 | struct bfd_link_info *info, |
| 2331 | bfd_boolean *pneeded, |
| 2332 | bfd **subsbfd) |
| 2333 | { |
| 2334 | bfd_size_type symesz; |
| 2335 | bfd_byte *esym; |
| 2336 | bfd_byte *esym_end; |
| 2337 | |
| 2338 | *pneeded = FALSE; |
| 2339 | |
| 2340 | if ((abfd->flags & DYNAMIC) != 0 |
| 2341 | && ! info->static_link |
| 2342 | && info->output_bfd->xvec == abfd->xvec) |
| 2343 | return xcoff_link_check_dynamic_ar_symbols (abfd, info, pneeded, subsbfd); |
| 2344 | |
| 2345 | symesz = bfd_coff_symesz (abfd); |
| 2346 | esym = (bfd_byte *) obj_coff_external_syms (abfd); |
| 2347 | esym_end = esym + obj_raw_syment_count (abfd) * symesz; |
| 2348 | while (esym < esym_end) |
| 2349 | { |
| 2350 | struct internal_syment sym; |
| 2351 | |
| 2352 | bfd_coff_swap_sym_in (abfd, (void *) esym, (void *) &sym); |
| 2353 | |
| 2354 | if (EXTERN_SYM_P (sym.n_sclass) && sym.n_scnum != N_UNDEF) |
| 2355 | { |
| 2356 | const char *name; |
| 2357 | char buf[SYMNMLEN + 1]; |
| 2358 | struct bfd_link_hash_entry *h; |
| 2359 | |
| 2360 | /* This symbol is externally visible, and is defined by this |
| 2361 | object file. */ |
| 2362 | name = _bfd_coff_internal_syment_name (abfd, &sym, buf); |
| 2363 | |
| 2364 | if (name == NULL) |
| 2365 | return FALSE; |
| 2366 | h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); |
| 2367 | |
| 2368 | /* We are only interested in symbols that are currently |
| 2369 | undefined. If a symbol is currently known to be common, |
| 2370 | XCOFF linkers do not bring in an object file which |
| 2371 | defines it. We also don't bring in symbols to satisfy |
| 2372 | undefined references in shared objects. */ |
| 2373 | if (h != NULL |
| 2374 | && h->type == bfd_link_hash_undefined |
| 2375 | && (info->output_bfd->xvec != abfd->xvec |
| 2376 | || (((struct xcoff_link_hash_entry *) h)->flags |
| 2377 | & XCOFF_DEF_DYNAMIC) == 0)) |
| 2378 | { |
| 2379 | if (!(*info->callbacks |
| 2380 | ->add_archive_element) (info, abfd, name, subsbfd)) |
| 2381 | continue; |
| 2382 | *pneeded = TRUE; |
| 2383 | return TRUE; |
| 2384 | } |
| 2385 | } |
| 2386 | |
| 2387 | esym += (sym.n_numaux + 1) * symesz; |
| 2388 | } |
| 2389 | |
| 2390 | /* We do not need this object file. */ |
| 2391 | return TRUE; |
| 2392 | } |
| 2393 | |
| 2394 | /* Check a single archive element to see if we need to include it in |
| 2395 | the link. *PNEEDED is set according to whether this element is |
| 2396 | needed in the link or not. This is called via |
| 2397 | _bfd_generic_link_add_archive_symbols. */ |
| 2398 | |
| 2399 | static bfd_boolean |
| 2400 | xcoff_link_check_archive_element (bfd *abfd, |
| 2401 | struct bfd_link_info *info, |
| 2402 | struct bfd_link_hash_entry *h ATTRIBUTE_UNUSED, |
| 2403 | const char *name ATTRIBUTE_UNUSED, |
| 2404 | bfd_boolean *pneeded) |
| 2405 | { |
| 2406 | bfd_boolean keep_syms_p; |
| 2407 | bfd *oldbfd; |
| 2408 | |
| 2409 | keep_syms_p = (obj_coff_external_syms (abfd) != NULL); |
| 2410 | if (!_bfd_coff_get_external_symbols (abfd)) |
| 2411 | return FALSE; |
| 2412 | |
| 2413 | oldbfd = abfd; |
| 2414 | if (!xcoff_link_check_ar_symbols (abfd, info, pneeded, &abfd)) |
| 2415 | return FALSE; |
| 2416 | |
| 2417 | if (*pneeded) |
| 2418 | { |
| 2419 | /* Potentially, the add_archive_element hook may have set a |
| 2420 | substitute BFD for us. */ |
| 2421 | if (abfd != oldbfd) |
| 2422 | { |
| 2423 | if (!keep_syms_p |
| 2424 | && !_bfd_coff_free_symbols (oldbfd)) |
| 2425 | return FALSE; |
| 2426 | keep_syms_p = (obj_coff_external_syms (abfd) != NULL); |
| 2427 | if (!_bfd_coff_get_external_symbols (abfd)) |
| 2428 | return FALSE; |
| 2429 | } |
| 2430 | if (!xcoff_link_add_symbols (abfd, info)) |
| 2431 | return FALSE; |
| 2432 | if (info->keep_memory) |
| 2433 | keep_syms_p = TRUE; |
| 2434 | } |
| 2435 | |
| 2436 | if (!keep_syms_p) |
| 2437 | { |
| 2438 | if (!_bfd_coff_free_symbols (abfd)) |
| 2439 | return FALSE; |
| 2440 | } |
| 2441 | |
| 2442 | return TRUE; |
| 2443 | } |
| 2444 | |
| 2445 | /* Given an XCOFF BFD, add symbols to the global hash table as |
| 2446 | appropriate. */ |
| 2447 | |
| 2448 | bfd_boolean |
| 2449 | _bfd_xcoff_bfd_link_add_symbols (bfd *abfd, struct bfd_link_info *info) |
| 2450 | { |
| 2451 | switch (bfd_get_format (abfd)) |
| 2452 | { |
| 2453 | case bfd_object: |
| 2454 | return xcoff_link_add_object_symbols (abfd, info); |
| 2455 | |
| 2456 | case bfd_archive: |
| 2457 | /* If the archive has a map, do the usual search. We then need |
| 2458 | to check the archive for dynamic objects, because they may not |
| 2459 | appear in the archive map even though they should, perhaps, be |
| 2460 | included. If the archive has no map, we just consider each object |
| 2461 | file in turn, since that apparently is what the AIX native linker |
| 2462 | does. */ |
| 2463 | if (bfd_has_map (abfd)) |
| 2464 | { |
| 2465 | if (! (_bfd_generic_link_add_archive_symbols |
| 2466 | (abfd, info, xcoff_link_check_archive_element))) |
| 2467 | return FALSE; |
| 2468 | } |
| 2469 | |
| 2470 | { |
| 2471 | bfd *member; |
| 2472 | |
| 2473 | member = bfd_openr_next_archived_file (abfd, NULL); |
| 2474 | while (member != NULL) |
| 2475 | { |
| 2476 | if (bfd_check_format (member, bfd_object) |
| 2477 | && (info->output_bfd->xvec == member->xvec) |
| 2478 | && (! bfd_has_map (abfd) || (member->flags & DYNAMIC) != 0)) |
| 2479 | { |
| 2480 | bfd_boolean needed; |
| 2481 | |
| 2482 | if (! xcoff_link_check_archive_element (member, info, |
| 2483 | NULL, NULL, &needed)) |
| 2484 | return FALSE; |
| 2485 | if (needed) |
| 2486 | member->archive_pass = -1; |
| 2487 | } |
| 2488 | member = bfd_openr_next_archived_file (abfd, member); |
| 2489 | } |
| 2490 | } |
| 2491 | |
| 2492 | return TRUE; |
| 2493 | |
| 2494 | default: |
| 2495 | bfd_set_error (bfd_error_wrong_format); |
| 2496 | return FALSE; |
| 2497 | } |
| 2498 | } |
| 2499 | \f |
| 2500 | bfd_boolean |
| 2501 | _bfd_xcoff_define_common_symbol (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 2502 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 2503 | struct bfd_link_hash_entry *harg) |
| 2504 | { |
| 2505 | struct xcoff_link_hash_entry *h; |
| 2506 | |
| 2507 | if (!bfd_generic_define_common_symbol (output_bfd, info, harg)) |
| 2508 | return FALSE; |
| 2509 | |
| 2510 | h = (struct xcoff_link_hash_entry *) harg; |
| 2511 | h->flags |= XCOFF_DEF_REGULAR; |
| 2512 | return TRUE; |
| 2513 | } |
| 2514 | \f |
| 2515 | /* If symbol H has not been interpreted as a function descriptor, |
| 2516 | see whether it should be. Set up its descriptor information if so. */ |
| 2517 | |
| 2518 | static bfd_boolean |
| 2519 | xcoff_find_function (struct bfd_link_info *info, |
| 2520 | struct xcoff_link_hash_entry *h) |
| 2521 | { |
| 2522 | if ((h->flags & XCOFF_DESCRIPTOR) == 0 |
| 2523 | && h->root.root.string[0] != '.') |
| 2524 | { |
| 2525 | char *fnname; |
| 2526 | struct xcoff_link_hash_entry *hfn; |
| 2527 | size_t amt; |
| 2528 | |
| 2529 | amt = strlen (h->root.root.string) + 2; |
| 2530 | fnname = bfd_malloc (amt); |
| 2531 | if (fnname == NULL) |
| 2532 | return FALSE; |
| 2533 | fnname[0] = '.'; |
| 2534 | strcpy (fnname + 1, h->root.root.string); |
| 2535 | hfn = xcoff_link_hash_lookup (xcoff_hash_table (info), |
| 2536 | fnname, FALSE, FALSE, TRUE); |
| 2537 | free (fnname); |
| 2538 | if (hfn != NULL |
| 2539 | && hfn->smclas == XMC_PR |
| 2540 | && (hfn->root.type == bfd_link_hash_defined |
| 2541 | || hfn->root.type == bfd_link_hash_defweak)) |
| 2542 | { |
| 2543 | h->flags |= XCOFF_DESCRIPTOR; |
| 2544 | h->descriptor = hfn; |
| 2545 | hfn->descriptor = h; |
| 2546 | } |
| 2547 | } |
| 2548 | return TRUE; |
| 2549 | } |
| 2550 | \f |
| 2551 | /* Return true if the given bfd contains at least one shared object. */ |
| 2552 | |
| 2553 | static bfd_boolean |
| 2554 | xcoff_archive_contains_shared_object_p (struct bfd_link_info *info, |
| 2555 | bfd *archive) |
| 2556 | { |
| 2557 | struct xcoff_archive_info *archive_info; |
| 2558 | bfd *member; |
| 2559 | |
| 2560 | archive_info = xcoff_get_archive_info (info, archive); |
| 2561 | if (!archive_info->know_contains_shared_object_p) |
| 2562 | { |
| 2563 | member = bfd_openr_next_archived_file (archive, NULL); |
| 2564 | while (member != NULL && (member->flags & DYNAMIC) == 0) |
| 2565 | member = bfd_openr_next_archived_file (archive, member); |
| 2566 | |
| 2567 | archive_info->contains_shared_object_p = (member != NULL); |
| 2568 | archive_info->know_contains_shared_object_p = 1; |
| 2569 | } |
| 2570 | return archive_info->contains_shared_object_p; |
| 2571 | } |
| 2572 | |
| 2573 | /* Symbol H qualifies for export by -bexpfull. Return true if it also |
| 2574 | qualifies for export by -bexpall. */ |
| 2575 | |
| 2576 | static bfd_boolean |
| 2577 | xcoff_covered_by_expall_p (struct xcoff_link_hash_entry *h) |
| 2578 | { |
| 2579 | /* Exclude symbols beginning with '_'. */ |
| 2580 | if (h->root.root.string[0] == '_') |
| 2581 | return FALSE; |
| 2582 | |
| 2583 | /* Exclude archive members that would otherwise be unreferenced. */ |
| 2584 | if ((h->flags & XCOFF_MARK) == 0 |
| 2585 | && (h->root.type == bfd_link_hash_defined |
| 2586 | || h->root.type == bfd_link_hash_defweak) |
| 2587 | && h->root.u.def.section->owner != NULL |
| 2588 | && h->root.u.def.section->owner->my_archive != NULL) |
| 2589 | return FALSE; |
| 2590 | |
| 2591 | return TRUE; |
| 2592 | } |
| 2593 | |
| 2594 | /* Return true if symbol H qualifies for the forms of automatic export |
| 2595 | specified by AUTO_EXPORT_FLAGS. */ |
| 2596 | |
| 2597 | static bfd_boolean |
| 2598 | xcoff_auto_export_p (struct bfd_link_info *info, |
| 2599 | struct xcoff_link_hash_entry *h, |
| 2600 | unsigned int auto_export_flags) |
| 2601 | { |
| 2602 | /* Don't automatically export things that were explicitly exported. */ |
| 2603 | if ((h->flags & XCOFF_EXPORT) != 0) |
| 2604 | return FALSE; |
| 2605 | |
| 2606 | /* Don't export things that we don't define. */ |
| 2607 | if ((h->flags & XCOFF_DEF_REGULAR) == 0) |
| 2608 | return FALSE; |
| 2609 | |
| 2610 | /* Don't export functions; export their descriptors instead. */ |
| 2611 | if (h->root.root.string[0] == '.') |
| 2612 | return FALSE; |
| 2613 | |
| 2614 | /* We don't export a symbol which is being defined by an object |
| 2615 | included from an archive which contains a shared object. The |
| 2616 | rationale is that if an archive contains both an unshared and |
| 2617 | a shared object, then there must be some reason that the |
| 2618 | unshared object is unshared, and we don't want to start |
| 2619 | providing a shared version of it. In particular, this solves |
| 2620 | a bug involving the _savefNN set of functions. gcc will call |
| 2621 | those functions without providing a slot to restore the TOC, |
| 2622 | so it is essential that these functions be linked in directly |
| 2623 | and not from a shared object, which means that a shared |
| 2624 | object which also happens to link them in must not export |
| 2625 | them. This is confusing, but I haven't been able to think of |
| 2626 | a different approach. Note that the symbols can, of course, |
| 2627 | be exported explicitly. */ |
| 2628 | if (h->root.type == bfd_link_hash_defined |
| 2629 | || h->root.type == bfd_link_hash_defweak) |
| 2630 | { |
| 2631 | bfd *owner; |
| 2632 | |
| 2633 | owner = h->root.u.def.section->owner; |
| 2634 | if (owner != NULL |
| 2635 | && owner->my_archive != NULL |
| 2636 | && xcoff_archive_contains_shared_object_p (info, owner->my_archive)) |
| 2637 | return FALSE; |
| 2638 | } |
| 2639 | |
| 2640 | /* Otherwise, all symbols are exported by -bexpfull. */ |
| 2641 | if ((auto_export_flags & XCOFF_EXPFULL) != 0) |
| 2642 | return TRUE; |
| 2643 | |
| 2644 | /* Despite its name, -bexpall exports most but not all symbols. */ |
| 2645 | if ((auto_export_flags & XCOFF_EXPALL) != 0 |
| 2646 | && xcoff_covered_by_expall_p (h)) |
| 2647 | return TRUE; |
| 2648 | |
| 2649 | return FALSE; |
| 2650 | } |
| 2651 | \f |
| 2652 | /* Return true if relocation REL needs to be copied to the .loader section. |
| 2653 | If REL is against a global symbol, H is that symbol, otherwise it |
| 2654 | is null. */ |
| 2655 | |
| 2656 | static bfd_boolean |
| 2657 | xcoff_need_ldrel_p (struct bfd_link_info *info, struct internal_reloc *rel, |
| 2658 | struct xcoff_link_hash_entry *h) |
| 2659 | { |
| 2660 | if (!xcoff_hash_table (info)->loader_section) |
| 2661 | return FALSE; |
| 2662 | |
| 2663 | switch (rel->r_type) |
| 2664 | { |
| 2665 | case R_TOC: |
| 2666 | case R_GL: |
| 2667 | case R_TCL: |
| 2668 | case R_TRL: |
| 2669 | case R_TRLA: |
| 2670 | /* We should never need a .loader reloc for a TOC-relative reloc. */ |
| 2671 | return FALSE; |
| 2672 | |
| 2673 | default: |
| 2674 | /* In this case, relocations against defined symbols can be resolved |
| 2675 | statically. */ |
| 2676 | if (h == NULL |
| 2677 | || h->root.type == bfd_link_hash_defined |
| 2678 | || h->root.type == bfd_link_hash_defweak |
| 2679 | || h->root.type == bfd_link_hash_common) |
| 2680 | return FALSE; |
| 2681 | |
| 2682 | /* We will always provide a local definition of function symbols, |
| 2683 | even if we don't have one yet. */ |
| 2684 | if ((h->flags & XCOFF_CALLED) != 0) |
| 2685 | return FALSE; |
| 2686 | |
| 2687 | return TRUE; |
| 2688 | |
| 2689 | case R_POS: |
| 2690 | case R_NEG: |
| 2691 | case R_RL: |
| 2692 | case R_RLA: |
| 2693 | /* Absolute relocations against absolute symbols can be |
| 2694 | resolved statically. */ |
| 2695 | if (h != NULL && bfd_is_abs_symbol (&h->root)) |
| 2696 | return FALSE; |
| 2697 | |
| 2698 | return TRUE; |
| 2699 | } |
| 2700 | } |
| 2701 | \f |
| 2702 | /* Mark a symbol as not being garbage, including the section in which |
| 2703 | it is defined. */ |
| 2704 | |
| 2705 | static inline bfd_boolean |
| 2706 | xcoff_mark_symbol (struct bfd_link_info *info, struct xcoff_link_hash_entry *h) |
| 2707 | { |
| 2708 | if ((h->flags & XCOFF_MARK) != 0) |
| 2709 | return TRUE; |
| 2710 | |
| 2711 | h->flags |= XCOFF_MARK; |
| 2712 | |
| 2713 | /* If we're marking an undefined symbol, try find some way of |
| 2714 | defining it. */ |
| 2715 | if (!bfd_link_relocatable (info) |
| 2716 | && (h->flags & XCOFF_IMPORT) == 0 |
| 2717 | && (h->flags & XCOFF_DEF_REGULAR) == 0 |
| 2718 | && (h->root.type == bfd_link_hash_undefined |
| 2719 | || h->root.type == bfd_link_hash_undefweak)) |
| 2720 | { |
| 2721 | /* First check whether this symbol can be interpreted as an |
| 2722 | undefined function descriptor for a defined function symbol. */ |
| 2723 | if (!xcoff_find_function (info, h)) |
| 2724 | return FALSE; |
| 2725 | |
| 2726 | if ((h->flags & XCOFF_DESCRIPTOR) != 0 |
| 2727 | && (h->descriptor->root.type == bfd_link_hash_defined |
| 2728 | || h->descriptor->root.type == bfd_link_hash_defweak)) |
| 2729 | { |
| 2730 | /* This is a descriptor for a defined symbol, but the input |
| 2731 | objects have not defined the descriptor itself. Fill in |
| 2732 | the definition automatically. |
| 2733 | |
| 2734 | Note that we do this even if we found a dynamic definition |
| 2735 | of H. The local function definition logically overrides |
| 2736 | the dynamic one. */ |
| 2737 | asection *sec; |
| 2738 | |
| 2739 | sec = xcoff_hash_table (info)->descriptor_section; |
| 2740 | h->root.type = bfd_link_hash_defined; |
| 2741 | h->root.u.def.section = sec; |
| 2742 | h->root.u.def.value = sec->size; |
| 2743 | h->smclas = XMC_DS; |
| 2744 | h->flags |= XCOFF_DEF_REGULAR; |
| 2745 | |
| 2746 | /* The size of the function descriptor depends on whether this |
| 2747 | is xcoff32 (12) or xcoff64 (24). */ |
| 2748 | sec->size += bfd_xcoff_function_descriptor_size (sec->owner); |
| 2749 | |
| 2750 | /* A function descriptor uses two relocs: one for the |
| 2751 | associated code, and one for the TOC address. */ |
| 2752 | xcoff_hash_table (info)->ldrel_count += 2; |
| 2753 | sec->reloc_count += 2; |
| 2754 | |
| 2755 | /* Mark the function itself. */ |
| 2756 | if (!xcoff_mark_symbol (info, h->descriptor)) |
| 2757 | return FALSE; |
| 2758 | |
| 2759 | /* Mark the TOC section, so that we get an anchor |
| 2760 | to relocate against. */ |
| 2761 | if (!xcoff_mark (info, xcoff_hash_table (info)->toc_section)) |
| 2762 | return FALSE; |
| 2763 | |
| 2764 | /* We handle writing out the contents of the descriptor in |
| 2765 | xcoff_write_global_symbol. */ |
| 2766 | } |
| 2767 | else if (info->static_link) |
| 2768 | /* We can't get a symbol value dynamically, so just assume |
| 2769 | that it's undefined. */ |
| 2770 | h->flags |= XCOFF_WAS_UNDEFINED; |
| 2771 | else if ((h->flags & XCOFF_CALLED) != 0) |
| 2772 | { |
| 2773 | /* This is a function symbol for which we need to create |
| 2774 | linkage code. */ |
| 2775 | asection *sec; |
| 2776 | struct xcoff_link_hash_entry *hds; |
| 2777 | |
| 2778 | /* Mark the descriptor (and its TOC section). */ |
| 2779 | hds = h->descriptor; |
| 2780 | BFD_ASSERT ((hds->root.type == bfd_link_hash_undefined |
| 2781 | || hds->root.type == bfd_link_hash_undefweak) |
| 2782 | && (hds->flags & XCOFF_DEF_REGULAR) == 0); |
| 2783 | if (!xcoff_mark_symbol (info, hds)) |
| 2784 | return FALSE; |
| 2785 | |
| 2786 | /* Treat this symbol as undefined if the descriptor was. */ |
| 2787 | if ((hds->flags & XCOFF_WAS_UNDEFINED) != 0) |
| 2788 | h->flags |= XCOFF_WAS_UNDEFINED; |
| 2789 | |
| 2790 | /* Allocate room for the global linkage code itself. */ |
| 2791 | sec = xcoff_hash_table (info)->linkage_section; |
| 2792 | h->root.type = bfd_link_hash_defined; |
| 2793 | h->root.u.def.section = sec; |
| 2794 | h->root.u.def.value = sec->size; |
| 2795 | h->smclas = XMC_GL; |
| 2796 | h->flags |= XCOFF_DEF_REGULAR; |
| 2797 | sec->size += bfd_xcoff_glink_code_size (info->output_bfd); |
| 2798 | |
| 2799 | /* The global linkage code requires a TOC entry for the |
| 2800 | descriptor. */ |
| 2801 | if (hds->toc_section == NULL) |
| 2802 | { |
| 2803 | int byte_size; |
| 2804 | |
| 2805 | /* 32 vs 64 |
| 2806 | xcoff32 uses 4 bytes in the toc. |
| 2807 | xcoff64 uses 8 bytes in the toc. */ |
| 2808 | if (bfd_xcoff_is_xcoff64 (info->output_bfd)) |
| 2809 | byte_size = 8; |
| 2810 | else if (bfd_xcoff_is_xcoff32 (info->output_bfd)) |
| 2811 | byte_size = 4; |
| 2812 | else |
| 2813 | return FALSE; |
| 2814 | |
| 2815 | /* Allocate room in the fallback TOC section. */ |
| 2816 | hds->toc_section = xcoff_hash_table (info)->toc_section; |
| 2817 | hds->u.toc_offset = hds->toc_section->size; |
| 2818 | hds->toc_section->size += byte_size; |
| 2819 | if (!xcoff_mark (info, hds->toc_section)) |
| 2820 | return FALSE; |
| 2821 | |
| 2822 | /* Allocate room for a static and dynamic R_TOC |
| 2823 | relocation. */ |
| 2824 | ++xcoff_hash_table (info)->ldrel_count; |
| 2825 | ++hds->toc_section->reloc_count; |
| 2826 | |
| 2827 | /* Set the index to -2 to force this symbol to |
| 2828 | get written out. */ |
| 2829 | hds->indx = -2; |
| 2830 | hds->flags |= XCOFF_SET_TOC | XCOFF_LDREL; |
| 2831 | } |
| 2832 | } |
| 2833 | else if ((h->flags & XCOFF_DEF_DYNAMIC) == 0) |
| 2834 | { |
| 2835 | /* Record that the symbol was undefined, then import it. |
| 2836 | -brtl links use a special fake import file. */ |
| 2837 | h->flags |= XCOFF_WAS_UNDEFINED | XCOFF_IMPORT; |
| 2838 | if (xcoff_hash_table (info)->rtld) |
| 2839 | { |
| 2840 | if (!xcoff_set_import_path (info, h, "", "..", "")) |
| 2841 | return FALSE; |
| 2842 | } |
| 2843 | else |
| 2844 | { |
| 2845 | if (!xcoff_set_import_path (info, h, NULL, NULL, NULL)) |
| 2846 | return FALSE; |
| 2847 | } |
| 2848 | } |
| 2849 | } |
| 2850 | |
| 2851 | if (h->root.type == bfd_link_hash_defined |
| 2852 | || h->root.type == bfd_link_hash_defweak) |
| 2853 | { |
| 2854 | asection *hsec; |
| 2855 | |
| 2856 | hsec = h->root.u.def.section; |
| 2857 | if (! bfd_is_abs_section (hsec) |
| 2858 | && (hsec->flags & SEC_MARK) == 0) |
| 2859 | { |
| 2860 | if (! xcoff_mark (info, hsec)) |
| 2861 | return FALSE; |
| 2862 | } |
| 2863 | } |
| 2864 | |
| 2865 | if (h->toc_section != NULL |
| 2866 | && (h->toc_section->flags & SEC_MARK) == 0) |
| 2867 | { |
| 2868 | if (! xcoff_mark (info, h->toc_section)) |
| 2869 | return FALSE; |
| 2870 | } |
| 2871 | |
| 2872 | return TRUE; |
| 2873 | } |
| 2874 | |
| 2875 | /* Look for a symbol called NAME. If the symbol is defined, mark it. |
| 2876 | If the symbol exists, set FLAGS. */ |
| 2877 | |
| 2878 | static bfd_boolean |
| 2879 | xcoff_mark_symbol_by_name (struct bfd_link_info *info, |
| 2880 | const char *name, unsigned int flags) |
| 2881 | { |
| 2882 | struct xcoff_link_hash_entry *h; |
| 2883 | |
| 2884 | h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, |
| 2885 | FALSE, FALSE, TRUE); |
| 2886 | if (h != NULL) |
| 2887 | { |
| 2888 | h->flags |= flags; |
| 2889 | if (h->root.type == bfd_link_hash_defined |
| 2890 | || h->root.type == bfd_link_hash_defweak) |
| 2891 | { |
| 2892 | if (!xcoff_mark (info, h->root.u.def.section)) |
| 2893 | return FALSE; |
| 2894 | } |
| 2895 | } |
| 2896 | return TRUE; |
| 2897 | } |
| 2898 | |
| 2899 | /* The mark phase of garbage collection. For a given section, mark |
| 2900 | it, and all the sections which define symbols to which it refers. |
| 2901 | Because this function needs to look at the relocs, we also count |
| 2902 | the number of relocs which need to be copied into the .loader |
| 2903 | section. */ |
| 2904 | |
| 2905 | static bfd_boolean |
| 2906 | xcoff_mark (struct bfd_link_info *info, asection *sec) |
| 2907 | { |
| 2908 | if (bfd_is_abs_section (sec) |
| 2909 | || (sec->flags & SEC_MARK) != 0) |
| 2910 | return TRUE; |
| 2911 | |
| 2912 | sec->flags |= SEC_MARK; |
| 2913 | |
| 2914 | if (sec->owner->xvec == info->output_bfd->xvec |
| 2915 | && coff_section_data (sec->owner, sec) != NULL |
| 2916 | && xcoff_section_data (sec->owner, sec) != NULL) |
| 2917 | { |
| 2918 | struct xcoff_link_hash_entry **syms; |
| 2919 | struct internal_reloc *rel, *relend; |
| 2920 | asection **csects; |
| 2921 | unsigned long i, first, last; |
| 2922 | |
| 2923 | /* Mark all the symbols in this section. */ |
| 2924 | syms = obj_xcoff_sym_hashes (sec->owner); |
| 2925 | csects = xcoff_data (sec->owner)->csects; |
| 2926 | first = xcoff_section_data (sec->owner, sec)->first_symndx; |
| 2927 | last = xcoff_section_data (sec->owner, sec)->last_symndx; |
| 2928 | for (i = first; i <= last; i++) |
| 2929 | if (csects[i] == sec |
| 2930 | && syms[i] != NULL |
| 2931 | && (syms[i]->flags & XCOFF_MARK) == 0) |
| 2932 | { |
| 2933 | if (!xcoff_mark_symbol (info, syms[i])) |
| 2934 | return FALSE; |
| 2935 | } |
| 2936 | |
| 2937 | /* Look through the section relocs. */ |
| 2938 | if ((sec->flags & SEC_RELOC) != 0 |
| 2939 | && sec->reloc_count > 0) |
| 2940 | { |
| 2941 | rel = xcoff_read_internal_relocs (sec->owner, sec, TRUE, |
| 2942 | NULL, FALSE, NULL); |
| 2943 | if (rel == NULL) |
| 2944 | return FALSE; |
| 2945 | relend = rel + sec->reloc_count; |
| 2946 | for (; rel < relend; rel++) |
| 2947 | { |
| 2948 | struct xcoff_link_hash_entry *h; |
| 2949 | |
| 2950 | if ((unsigned int) rel->r_symndx |
| 2951 | > obj_raw_syment_count (sec->owner)) |
| 2952 | continue; |
| 2953 | |
| 2954 | h = obj_xcoff_sym_hashes (sec->owner)[rel->r_symndx]; |
| 2955 | if (h != NULL) |
| 2956 | { |
| 2957 | if ((h->flags & XCOFF_MARK) == 0) |
| 2958 | { |
| 2959 | if (!xcoff_mark_symbol (info, h)) |
| 2960 | return FALSE; |
| 2961 | } |
| 2962 | } |
| 2963 | else |
| 2964 | { |
| 2965 | asection *rsec; |
| 2966 | |
| 2967 | rsec = xcoff_data (sec->owner)->csects[rel->r_symndx]; |
| 2968 | if (rsec != NULL |
| 2969 | && (rsec->flags & SEC_MARK) == 0) |
| 2970 | { |
| 2971 | if (!xcoff_mark (info, rsec)) |
| 2972 | return FALSE; |
| 2973 | } |
| 2974 | } |
| 2975 | |
| 2976 | /* See if this reloc needs to be copied into the .loader |
| 2977 | section. */ |
| 2978 | if (xcoff_need_ldrel_p (info, rel, h)) |
| 2979 | { |
| 2980 | ++xcoff_hash_table (info)->ldrel_count; |
| 2981 | if (h != NULL) |
| 2982 | h->flags |= XCOFF_LDREL; |
| 2983 | } |
| 2984 | } |
| 2985 | |
| 2986 | if (! info->keep_memory |
| 2987 | && coff_section_data (sec->owner, sec) != NULL |
| 2988 | && coff_section_data (sec->owner, sec)->relocs != NULL |
| 2989 | && ! coff_section_data (sec->owner, sec)->keep_relocs) |
| 2990 | { |
| 2991 | free (coff_section_data (sec->owner, sec)->relocs); |
| 2992 | coff_section_data (sec->owner, sec)->relocs = NULL; |
| 2993 | } |
| 2994 | } |
| 2995 | } |
| 2996 | |
| 2997 | return TRUE; |
| 2998 | } |
| 2999 | |
| 3000 | /* Routines that are called after all the input files have been |
| 3001 | handled, but before the sections are laid out in memory. */ |
| 3002 | |
| 3003 | /* The sweep phase of garbage collection. Remove all garbage |
| 3004 | sections. */ |
| 3005 | |
| 3006 | static void |
| 3007 | xcoff_sweep (struct bfd_link_info *info) |
| 3008 | { |
| 3009 | bfd *sub; |
| 3010 | |
| 3011 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
| 3012 | { |
| 3013 | asection *o; |
| 3014 | |
| 3015 | for (o = sub->sections; o != NULL; o = o->next) |
| 3016 | { |
| 3017 | if ((o->flags & SEC_MARK) == 0) |
| 3018 | { |
| 3019 | /* Keep all sections from non-XCOFF input files. Keep |
| 3020 | special sections. Keep .debug sections for the |
| 3021 | moment. */ |
| 3022 | if (sub->xvec != info->output_bfd->xvec |
| 3023 | || o == xcoff_hash_table (info)->debug_section |
| 3024 | || o == xcoff_hash_table (info)->loader_section |
| 3025 | || o == xcoff_hash_table (info)->linkage_section |
| 3026 | || o == xcoff_hash_table (info)->descriptor_section |
| 3027 | || (bfd_section_flags (o) & SEC_DEBUGGING) |
| 3028 | || strcmp (o->name, ".debug") == 0) |
| 3029 | o->flags |= SEC_MARK; |
| 3030 | else |
| 3031 | { |
| 3032 | o->size = 0; |
| 3033 | o->reloc_count = 0; |
| 3034 | } |
| 3035 | } |
| 3036 | } |
| 3037 | } |
| 3038 | } |
| 3039 | |
| 3040 | /* Record the number of elements in a set. This is used to output the |
| 3041 | correct csect length. */ |
| 3042 | |
| 3043 | bfd_boolean |
| 3044 | bfd_xcoff_link_record_set (bfd *output_bfd, |
| 3045 | struct bfd_link_info *info, |
| 3046 | struct bfd_link_hash_entry *harg, |
| 3047 | bfd_size_type size) |
| 3048 | { |
| 3049 | struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg; |
| 3050 | struct xcoff_link_size_list *n; |
| 3051 | size_t amt; |
| 3052 | |
| 3053 | if (bfd_get_flavour (output_bfd) != bfd_target_xcoff_flavour) |
| 3054 | return TRUE; |
| 3055 | |
| 3056 | /* This will hardly ever be called. I don't want to burn four bytes |
| 3057 | per global symbol, so instead the size is kept on a linked list |
| 3058 | attached to the hash table. */ |
| 3059 | amt = sizeof (* n); |
| 3060 | n = bfd_alloc (output_bfd, amt); |
| 3061 | if (n == NULL) |
| 3062 | return FALSE; |
| 3063 | n->next = xcoff_hash_table (info)->size_list; |
| 3064 | n->h = h; |
| 3065 | n->size = size; |
| 3066 | xcoff_hash_table (info)->size_list = n; |
| 3067 | |
| 3068 | h->flags |= XCOFF_HAS_SIZE; |
| 3069 | |
| 3070 | return TRUE; |
| 3071 | } |
| 3072 | |
| 3073 | /* Import a symbol. */ |
| 3074 | |
| 3075 | bfd_boolean |
| 3076 | bfd_xcoff_import_symbol (bfd *output_bfd, |
| 3077 | struct bfd_link_info *info, |
| 3078 | struct bfd_link_hash_entry *harg, |
| 3079 | bfd_vma val, |
| 3080 | const char *imppath, |
| 3081 | const char *impfile, |
| 3082 | const char *impmember, |
| 3083 | unsigned int syscall_flag) |
| 3084 | { |
| 3085 | struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg; |
| 3086 | |
| 3087 | if (bfd_get_flavour (output_bfd) != bfd_target_xcoff_flavour) |
| 3088 | return TRUE; |
| 3089 | |
| 3090 | /* A symbol name which starts with a period is the code for a |
| 3091 | function. If the symbol is undefined, then add an undefined |
| 3092 | symbol for the function descriptor, and import that instead. */ |
| 3093 | if (h->root.root.string[0] == '.' |
| 3094 | && h->root.type == bfd_link_hash_undefined |
| 3095 | && val == (bfd_vma) -1) |
| 3096 | { |
| 3097 | struct xcoff_link_hash_entry *hds; |
| 3098 | |
| 3099 | hds = h->descriptor; |
| 3100 | if (hds == NULL) |
| 3101 | { |
| 3102 | hds = xcoff_link_hash_lookup (xcoff_hash_table (info), |
| 3103 | h->root.root.string + 1, |
| 3104 | TRUE, FALSE, TRUE); |
| 3105 | if (hds == NULL) |
| 3106 | return FALSE; |
| 3107 | if (hds->root.type == bfd_link_hash_new) |
| 3108 | { |
| 3109 | hds->root.type = bfd_link_hash_undefined; |
| 3110 | hds->root.u.undef.abfd = h->root.u.undef.abfd; |
| 3111 | } |
| 3112 | hds->flags |= XCOFF_DESCRIPTOR; |
| 3113 | BFD_ASSERT ((h->flags & XCOFF_DESCRIPTOR) == 0); |
| 3114 | hds->descriptor = h; |
| 3115 | h->descriptor = hds; |
| 3116 | } |
| 3117 | |
| 3118 | /* Now, if the descriptor is undefined, import the descriptor |
| 3119 | rather than the symbol we were told to import. FIXME: Is |
| 3120 | this correct in all cases? */ |
| 3121 | if (hds->root.type == bfd_link_hash_undefined) |
| 3122 | h = hds; |
| 3123 | } |
| 3124 | |
| 3125 | h->flags |= (XCOFF_IMPORT | syscall_flag); |
| 3126 | |
| 3127 | if (val != (bfd_vma) -1) |
| 3128 | { |
| 3129 | if (h->root.type == bfd_link_hash_defined |
| 3130 | && (!bfd_is_abs_symbol (&h->root) |
| 3131 | || h->root.u.def.value != val)) |
| 3132 | (*info->callbacks->multiple_definition) (info, &h->root, output_bfd, |
| 3133 | bfd_abs_section_ptr, val); |
| 3134 | |
| 3135 | h->root.type = bfd_link_hash_defined; |
| 3136 | h->root.u.def.section = bfd_abs_section_ptr; |
| 3137 | h->root.u.def.value = val; |
| 3138 | h->smclas = XMC_XO; |
| 3139 | } |
| 3140 | |
| 3141 | if (!xcoff_set_import_path (info, h, imppath, impfile, impmember)) |
| 3142 | return FALSE; |
| 3143 | |
| 3144 | return TRUE; |
| 3145 | } |
| 3146 | |
| 3147 | /* Export a symbol. */ |
| 3148 | |
| 3149 | bfd_boolean |
| 3150 | bfd_xcoff_export_symbol (bfd *output_bfd, |
| 3151 | struct bfd_link_info *info, |
| 3152 | struct bfd_link_hash_entry *harg) |
| 3153 | { |
| 3154 | struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg; |
| 3155 | |
| 3156 | if (bfd_get_flavour (output_bfd) != bfd_target_xcoff_flavour) |
| 3157 | return TRUE; |
| 3158 | |
| 3159 | h->flags |= XCOFF_EXPORT; |
| 3160 | |
| 3161 | /* FIXME: I'm not at all sure what syscall is supposed to mean, so |
| 3162 | I'm just going to ignore it until somebody explains it. */ |
| 3163 | |
| 3164 | /* Make sure we don't garbage collect this symbol. */ |
| 3165 | if (! xcoff_mark_symbol (info, h)) |
| 3166 | return FALSE; |
| 3167 | |
| 3168 | /* If this is a function descriptor, make sure we don't garbage |
| 3169 | collect the associated function code. We normally don't have to |
| 3170 | worry about this, because the descriptor will be attached to a |
| 3171 | section with relocs, but if we are creating the descriptor |
| 3172 | ourselves those relocs will not be visible to the mark code. */ |
| 3173 | if ((h->flags & XCOFF_DESCRIPTOR) != 0) |
| 3174 | { |
| 3175 | if (! xcoff_mark_symbol (info, h->descriptor)) |
| 3176 | return FALSE; |
| 3177 | } |
| 3178 | |
| 3179 | return TRUE; |
| 3180 | } |
| 3181 | |
| 3182 | /* Count a reloc against a symbol. This is called for relocs |
| 3183 | generated by the linker script, typically for global constructors |
| 3184 | and destructors. */ |
| 3185 | |
| 3186 | bfd_boolean |
| 3187 | bfd_xcoff_link_count_reloc (bfd *output_bfd, |
| 3188 | struct bfd_link_info *info, |
| 3189 | const char *name) |
| 3190 | { |
| 3191 | struct xcoff_link_hash_entry *h; |
| 3192 | |
| 3193 | if (bfd_get_flavour (output_bfd) != bfd_target_xcoff_flavour) |
| 3194 | return TRUE; |
| 3195 | |
| 3196 | h = ((struct xcoff_link_hash_entry *) |
| 3197 | bfd_wrapped_link_hash_lookup (output_bfd, info, name, FALSE, FALSE, |
| 3198 | FALSE)); |
| 3199 | if (h == NULL) |
| 3200 | { |
| 3201 | _bfd_error_handler (_("%s: no such symbol"), name); |
| 3202 | bfd_set_error (bfd_error_no_symbols); |
| 3203 | return FALSE; |
| 3204 | } |
| 3205 | |
| 3206 | h->flags |= XCOFF_REF_REGULAR; |
| 3207 | if (xcoff_hash_table (info)->loader_section) |
| 3208 | { |
| 3209 | h->flags |= XCOFF_LDREL; |
| 3210 | ++xcoff_hash_table (info)->ldrel_count; |
| 3211 | } |
| 3212 | |
| 3213 | /* Mark the symbol to avoid garbage collection. */ |
| 3214 | if (! xcoff_mark_symbol (info, h)) |
| 3215 | return FALSE; |
| 3216 | |
| 3217 | return TRUE; |
| 3218 | } |
| 3219 | |
| 3220 | /* This function is called for each symbol to which the linker script |
| 3221 | assigns a value. */ |
| 3222 | |
| 3223 | bfd_boolean |
| 3224 | bfd_xcoff_record_link_assignment (bfd *output_bfd, |
| 3225 | struct bfd_link_info *info, |
| 3226 | const char *name) |
| 3227 | { |
| 3228 | struct xcoff_link_hash_entry *h; |
| 3229 | |
| 3230 | if (bfd_get_flavour (output_bfd) != bfd_target_xcoff_flavour) |
| 3231 | return TRUE; |
| 3232 | |
| 3233 | h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, TRUE, TRUE, |
| 3234 | FALSE); |
| 3235 | if (h == NULL) |
| 3236 | return FALSE; |
| 3237 | |
| 3238 | h->flags |= XCOFF_DEF_REGULAR; |
| 3239 | |
| 3240 | return TRUE; |
| 3241 | } |
| 3242 | |
| 3243 | /* An xcoff_link_hash_traverse callback for which DATA points to an |
| 3244 | xcoff_loader_info. Mark all symbols that should be automatically |
| 3245 | exported. */ |
| 3246 | |
| 3247 | static bfd_boolean |
| 3248 | xcoff_mark_auto_exports (struct xcoff_link_hash_entry *h, void *data) |
| 3249 | { |
| 3250 | struct xcoff_loader_info *ldinfo; |
| 3251 | |
| 3252 | ldinfo = (struct xcoff_loader_info *) data; |
| 3253 | if (xcoff_auto_export_p (ldinfo->info, h, ldinfo->auto_export_flags)) |
| 3254 | { |
| 3255 | if (!xcoff_mark_symbol (ldinfo->info, h)) |
| 3256 | ldinfo->failed = TRUE; |
| 3257 | } |
| 3258 | return TRUE; |
| 3259 | } |
| 3260 | |
| 3261 | /* Add a symbol to the .loader symbols, if necessary. */ |
| 3262 | |
| 3263 | /* INPUT_BFD has an external symbol associated with hash table entry H |
| 3264 | and csect CSECT. Return true if INPUT_BFD defines H. */ |
| 3265 | |
| 3266 | static bfd_boolean |
| 3267 | xcoff_final_definition_p (bfd *input_bfd, struct xcoff_link_hash_entry *h, |
| 3268 | asection *csect) |
| 3269 | { |
| 3270 | switch (h->root.type) |
| 3271 | { |
| 3272 | case bfd_link_hash_defined: |
| 3273 | case bfd_link_hash_defweak: |
| 3274 | /* No input bfd owns absolute symbols. They are written by |
| 3275 | xcoff_write_global_symbol instead. */ |
| 3276 | return (!bfd_is_abs_section (csect) |
| 3277 | && h->root.u.def.section == csect); |
| 3278 | |
| 3279 | case bfd_link_hash_common: |
| 3280 | return h->root.u.c.p->section->owner == input_bfd; |
| 3281 | |
| 3282 | case bfd_link_hash_undefined: |
| 3283 | case bfd_link_hash_undefweak: |
| 3284 | /* We can't treat undef.abfd as the owner because that bfd |
| 3285 | might be a dynamic object. Allow any bfd to claim it. */ |
| 3286 | return TRUE; |
| 3287 | |
| 3288 | default: |
| 3289 | abort (); |
| 3290 | } |
| 3291 | } |
| 3292 | |
| 3293 | /* See if H should have a loader symbol associated with it. */ |
| 3294 | |
| 3295 | static bfd_boolean |
| 3296 | xcoff_build_ldsym (struct xcoff_loader_info *ldinfo, |
| 3297 | struct xcoff_link_hash_entry *h) |
| 3298 | { |
| 3299 | size_t amt; |
| 3300 | |
| 3301 | /* Warn if this symbol is exported but not defined. */ |
| 3302 | if ((h->flags & XCOFF_EXPORT) != 0 |
| 3303 | && (h->flags & XCOFF_WAS_UNDEFINED) != 0) |
| 3304 | { |
| 3305 | _bfd_error_handler |
| 3306 | (_("warning: attempt to export undefined symbol `%s'"), |
| 3307 | h->root.root.string); |
| 3308 | return TRUE; |
| 3309 | } |
| 3310 | |
| 3311 | /* We need to add a symbol to the .loader section if it is mentioned |
| 3312 | in a reloc which we are copying to the .loader section and it was |
| 3313 | not defined or common, or if it is the entry point, or if it is |
| 3314 | being exported. */ |
| 3315 | if (((h->flags & XCOFF_LDREL) == 0 |
| 3316 | || h->root.type == bfd_link_hash_defined |
| 3317 | || h->root.type == bfd_link_hash_defweak |
| 3318 | || h->root.type == bfd_link_hash_common) |
| 3319 | && (h->flags & XCOFF_ENTRY) == 0 |
| 3320 | && (h->flags & XCOFF_EXPORT) == 0) |
| 3321 | return TRUE; |
| 3322 | |
| 3323 | /* We need to add this symbol to the .loader symbols. */ |
| 3324 | |
| 3325 | BFD_ASSERT (h->ldsym == NULL); |
| 3326 | amt = sizeof (struct internal_ldsym); |
| 3327 | h->ldsym = bfd_zalloc (ldinfo->output_bfd, amt); |
| 3328 | if (h->ldsym == NULL) |
| 3329 | { |
| 3330 | ldinfo->failed = TRUE; |
| 3331 | return FALSE; |
| 3332 | } |
| 3333 | |
| 3334 | if ((h->flags & XCOFF_IMPORT) != 0) |
| 3335 | { |
| 3336 | /* Give imported descriptors class XMC_DS rather than XMC_UA. */ |
| 3337 | if ((h->flags & XCOFF_DESCRIPTOR) != 0) |
| 3338 | h->smclas = XMC_DS; |
| 3339 | h->ldsym->l_ifile = h->ldindx; |
| 3340 | } |
| 3341 | |
| 3342 | /* The first 3 symbol table indices are reserved to indicate the |
| 3343 | data, text and bss sections. */ |
| 3344 | h->ldindx = ldinfo->ldsym_count + 3; |
| 3345 | |
| 3346 | ++ldinfo->ldsym_count; |
| 3347 | |
| 3348 | if (! bfd_xcoff_put_ldsymbol_name (ldinfo->output_bfd, ldinfo, |
| 3349 | h->ldsym, h->root.root.string)) |
| 3350 | return FALSE; |
| 3351 | |
| 3352 | h->flags |= XCOFF_BUILT_LDSYM; |
| 3353 | return TRUE; |
| 3354 | } |
| 3355 | |
| 3356 | /* An xcoff_htab_traverse callback that is called for each symbol |
| 3357 | once garbage collection is complete. */ |
| 3358 | |
| 3359 | static bfd_boolean |
| 3360 | xcoff_post_gc_symbol (struct xcoff_link_hash_entry *h, void * p) |
| 3361 | { |
| 3362 | struct xcoff_loader_info *ldinfo = (struct xcoff_loader_info *) p; |
| 3363 | |
| 3364 | /* __rtinit, this symbol has special handling. */ |
| 3365 | if (h->flags & XCOFF_RTINIT) |
| 3366 | return TRUE; |
| 3367 | |
| 3368 | /* We don't want to garbage collect symbols which are not defined in |
| 3369 | XCOFF files. This is a convenient place to mark them. */ |
| 3370 | if (xcoff_hash_table (ldinfo->info)->gc |
| 3371 | && (h->flags & XCOFF_MARK) == 0 |
| 3372 | && (h->root.type == bfd_link_hash_defined |
| 3373 | || h->root.type == bfd_link_hash_defweak) |
| 3374 | && (h->root.u.def.section->owner == NULL |
| 3375 | || (h->root.u.def.section->owner->xvec |
| 3376 | != ldinfo->info->output_bfd->xvec))) |
| 3377 | h->flags |= XCOFF_MARK; |
| 3378 | |
| 3379 | /* Skip discarded symbols. */ |
| 3380 | if (xcoff_hash_table (ldinfo->info)->gc |
| 3381 | && (h->flags & XCOFF_MARK) == 0) |
| 3382 | return TRUE; |
| 3383 | |
| 3384 | /* If this is still a common symbol, and it wasn't garbage |
| 3385 | collected, we need to actually allocate space for it in the .bss |
| 3386 | section. */ |
| 3387 | if (h->root.type == bfd_link_hash_common |
| 3388 | && h->root.u.c.p->section->size == 0) |
| 3389 | { |
| 3390 | BFD_ASSERT (bfd_is_com_section (h->root.u.c.p->section)); |
| 3391 | h->root.u.c.p->section->size = h->root.u.c.size; |
| 3392 | } |
| 3393 | |
| 3394 | if (xcoff_hash_table (ldinfo->info)->loader_section) |
| 3395 | { |
| 3396 | if (xcoff_auto_export_p (ldinfo->info, h, ldinfo->auto_export_flags)) |
| 3397 | h->flags |= XCOFF_EXPORT; |
| 3398 | |
| 3399 | if (!xcoff_build_ldsym (ldinfo, h)) |
| 3400 | return FALSE; |
| 3401 | } |
| 3402 | |
| 3403 | return TRUE; |
| 3404 | } |
| 3405 | |
| 3406 | /* INPUT_BFD includes XCOFF symbol ISYM, which is associated with linker |
| 3407 | hash table entry H and csect CSECT. AUX contains ISYM's auxillary |
| 3408 | csect information, if any. NAME is the function's name if the name |
| 3409 | is stored in the .debug section, otherwise it is null. |
| 3410 | |
| 3411 | Return 1 if we should include an appropriately-adjusted ISYM |
| 3412 | in the output file, 0 if we should discard ISYM, or -1 if an |
| 3413 | error occured. */ |
| 3414 | |
| 3415 | static int |
| 3416 | xcoff_keep_symbol_p (struct bfd_link_info *info, bfd *input_bfd, |
| 3417 | struct internal_syment *isym, |
| 3418 | union internal_auxent *aux, |
| 3419 | struct xcoff_link_hash_entry *h, |
| 3420 | asection *csect, const char *name) |
| 3421 | { |
| 3422 | int smtyp; |
| 3423 | |
| 3424 | /* If we are skipping this csect, we want to strip the symbol too. */ |
| 3425 | if (csect == NULL) |
| 3426 | return 0; |
| 3427 | |
| 3428 | /* Likewise if we garbage-collected the csect. */ |
| 3429 | if (xcoff_hash_table (info)->gc |
| 3430 | && !bfd_is_abs_section (csect) |
| 3431 | && !bfd_is_und_section (csect) |
| 3432 | && (csect->flags & SEC_MARK) == 0) |
| 3433 | return 0; |
| 3434 | |
| 3435 | /* An XCOFF linker always removes C_STAT symbols. */ |
| 3436 | if (isym->n_sclass == C_STAT) |
| 3437 | return 0; |
| 3438 | |
| 3439 | /* We generate the TOC anchor separately. */ |
| 3440 | if (isym->n_sclass == C_HIDEXT |
| 3441 | && aux->x_csect.x_smclas == XMC_TC0) |
| 3442 | return 0; |
| 3443 | |
| 3444 | /* If we are stripping all symbols, we want to discard this one. */ |
| 3445 | if (info->strip == strip_all) |
| 3446 | return 0; |
| 3447 | |
| 3448 | /* Discard symbols that are defined elsewhere. */ |
| 3449 | if (EXTERN_SYM_P (isym->n_sclass)) |
| 3450 | { |
| 3451 | if ((h->flags & XCOFF_ALLOCATED) != 0) |
| 3452 | return 0; |
| 3453 | if (!xcoff_final_definition_p (input_bfd, h, csect)) |
| 3454 | return 0; |
| 3455 | } |
| 3456 | |
| 3457 | /* If we're discarding local symbols, check whether ISYM is local. */ |
| 3458 | smtyp = SMTYP_SMTYP (aux->x_csect.x_smtyp); |
| 3459 | if (info->discard == discard_all |
| 3460 | && !EXTERN_SYM_P (isym->n_sclass) |
| 3461 | && (isym->n_sclass != C_HIDEXT || smtyp != XTY_SD)) |
| 3462 | return 0; |
| 3463 | |
| 3464 | /* If we're stripping debugging symbols, check whether ISYM is one. */ |
| 3465 | if (info->strip == strip_debugger |
| 3466 | && isym->n_scnum == N_DEBUG) |
| 3467 | return 0; |
| 3468 | |
| 3469 | /* If we are stripping symbols based on name, check how ISYM's |
| 3470 | name should be handled. */ |
| 3471 | if (info->strip == strip_some |
| 3472 | || info->discard == discard_l) |
| 3473 | { |
| 3474 | char buf[SYMNMLEN + 1]; |
| 3475 | |
| 3476 | if (name == NULL) |
| 3477 | { |
| 3478 | name = _bfd_coff_internal_syment_name (input_bfd, isym, buf); |
| 3479 | if (name == NULL) |
| 3480 | return -1; |
| 3481 | } |
| 3482 | |
| 3483 | if (info->strip == strip_some |
| 3484 | && bfd_hash_lookup (info->keep_hash, name, FALSE, FALSE) == NULL) |
| 3485 | return 0; |
| 3486 | |
| 3487 | if (info->discard == discard_l |
| 3488 | && !EXTERN_SYM_P (isym->n_sclass) |
| 3489 | && (isym->n_sclass != C_HIDEXT || smtyp != XTY_SD) |
| 3490 | && bfd_is_local_label_name (input_bfd, name)) |
| 3491 | return 0; |
| 3492 | } |
| 3493 | |
| 3494 | return 1; |
| 3495 | } |
| 3496 | |
| 3497 | /* Lay out the .loader section, filling in the header and the import paths. |
| 3498 | LIBPATH is as for bfd_xcoff_size_dynamic_sections. */ |
| 3499 | |
| 3500 | static bfd_boolean |
| 3501 | xcoff_build_loader_section (struct xcoff_loader_info *ldinfo, |
| 3502 | const char *libpath) |
| 3503 | { |
| 3504 | bfd *output_bfd; |
| 3505 | struct xcoff_link_hash_table *htab; |
| 3506 | struct internal_ldhdr *ldhdr; |
| 3507 | struct xcoff_import_file *fl; |
| 3508 | bfd_size_type stoff; |
| 3509 | size_t impsize, impcount; |
| 3510 | asection *lsec; |
| 3511 | char *out; |
| 3512 | |
| 3513 | /* Work out the size of the import file names. Each import file ID |
| 3514 | consists of three null terminated strings: the path, the file |
| 3515 | name, and the archive member name. The first entry in the list |
| 3516 | of names is the path to use to find objects, which the linker has |
| 3517 | passed in as the libpath argument. For some reason, the path |
| 3518 | entry in the other import file names appears to always be empty. */ |
| 3519 | output_bfd = ldinfo->output_bfd; |
| 3520 | htab = xcoff_hash_table (ldinfo->info); |
| 3521 | impsize = strlen (libpath) + 3; |
| 3522 | impcount = 1; |
| 3523 | for (fl = htab->imports; fl != NULL; fl = fl->next) |
| 3524 | { |
| 3525 | ++impcount; |
| 3526 | impsize += (strlen (fl->path) |
| 3527 | + strlen (fl->file) |
| 3528 | + strlen (fl->member) |
| 3529 | + 3); |
| 3530 | } |
| 3531 | |
| 3532 | /* Set up the .loader section header. */ |
| 3533 | ldhdr = &htab->ldhdr; |
| 3534 | ldhdr->l_version = bfd_xcoff_ldhdr_version(output_bfd); |
| 3535 | ldhdr->l_nsyms = ldinfo->ldsym_count; |
| 3536 | ldhdr->l_nreloc = htab->ldrel_count; |
| 3537 | ldhdr->l_istlen = impsize; |
| 3538 | ldhdr->l_nimpid = impcount; |
| 3539 | ldhdr->l_impoff = (bfd_xcoff_ldhdrsz (output_bfd) |
| 3540 | + ldhdr->l_nsyms * bfd_xcoff_ldsymsz (output_bfd) |
| 3541 | + ldhdr->l_nreloc * bfd_xcoff_ldrelsz (output_bfd)); |
| 3542 | ldhdr->l_stlen = ldinfo->string_size; |
| 3543 | stoff = ldhdr->l_impoff + impsize; |
| 3544 | if (ldinfo->string_size == 0) |
| 3545 | ldhdr->l_stoff = 0; |
| 3546 | else |
| 3547 | ldhdr->l_stoff = stoff; |
| 3548 | |
| 3549 | /* 64 bit elements to ldhdr |
| 3550 | The swap out routine for 32 bit will ignore them. |
| 3551 | Nothing fancy, symbols come after the header and relocs come |
| 3552 | after symbols. */ |
| 3553 | ldhdr->l_symoff = bfd_xcoff_ldhdrsz (output_bfd); |
| 3554 | ldhdr->l_rldoff = (bfd_xcoff_ldhdrsz (output_bfd) |
| 3555 | + ldhdr->l_nsyms * bfd_xcoff_ldsymsz (output_bfd)); |
| 3556 | |
| 3557 | /* We now know the final size of the .loader section. Allocate |
| 3558 | space for it. */ |
| 3559 | lsec = htab->loader_section; |
| 3560 | lsec->size = stoff + ldhdr->l_stlen; |
| 3561 | lsec->contents = bfd_zalloc (output_bfd, lsec->size); |
| 3562 | if (lsec->contents == NULL) |
| 3563 | return FALSE; |
| 3564 | |
| 3565 | /* Set up the header. */ |
| 3566 | bfd_xcoff_swap_ldhdr_out (output_bfd, ldhdr, lsec->contents); |
| 3567 | |
| 3568 | /* Set up the import file names. */ |
| 3569 | out = (char *) lsec->contents + ldhdr->l_impoff; |
| 3570 | strcpy (out, libpath); |
| 3571 | out += strlen (libpath) + 1; |
| 3572 | *out++ = '\0'; |
| 3573 | *out++ = '\0'; |
| 3574 | for (fl = htab->imports; fl != NULL; fl = fl->next) |
| 3575 | { |
| 3576 | const char *s; |
| 3577 | |
| 3578 | s = fl->path; |
| 3579 | while ((*out++ = *s++) != '\0') |
| 3580 | ; |
| 3581 | s = fl->file; |
| 3582 | while ((*out++ = *s++) != '\0') |
| 3583 | ; |
| 3584 | s = fl->member; |
| 3585 | while ((*out++ = *s++) != '\0') |
| 3586 | ; |
| 3587 | } |
| 3588 | |
| 3589 | BFD_ASSERT ((bfd_size_type) ((bfd_byte *) out - lsec->contents) == stoff); |
| 3590 | |
| 3591 | /* Set up the symbol string table. */ |
| 3592 | if (ldinfo->string_size > 0) |
| 3593 | { |
| 3594 | memcpy (out, ldinfo->strings, ldinfo->string_size); |
| 3595 | free (ldinfo->strings); |
| 3596 | ldinfo->strings = NULL; |
| 3597 | } |
| 3598 | |
| 3599 | /* We can't set up the symbol table or the relocs yet, because we |
| 3600 | don't yet know the final position of the various sections. The |
| 3601 | .loader symbols are written out when the corresponding normal |
| 3602 | symbols are written out in xcoff_link_input_bfd or |
| 3603 | xcoff_write_global_symbol. The .loader relocs are written out |
| 3604 | when the corresponding normal relocs are handled in |
| 3605 | xcoff_link_input_bfd. */ |
| 3606 | |
| 3607 | return TRUE; |
| 3608 | } |
| 3609 | |
| 3610 | /* Build the .loader section. This is called by the XCOFF linker |
| 3611 | emulation before_allocation routine. We must set the size of the |
| 3612 | .loader section before the linker lays out the output file. |
| 3613 | LIBPATH is the library path to search for shared objects; this is |
| 3614 | normally built from the -L arguments passed to the linker. ENTRY |
| 3615 | is the name of the entry point symbol (the -e linker option). |
| 3616 | FILE_ALIGN is the alignment to use for sections within the file |
| 3617 | (the -H linker option). MAXSTACK is the maximum stack size (the |
| 3618 | -bmaxstack linker option). MAXDATA is the maximum data size (the |
| 3619 | -bmaxdata linker option). GC is whether to do garbage collection |
| 3620 | (the -bgc linker option). MODTYPE is the module type (the |
| 3621 | -bmodtype linker option). TEXTRO is whether the text section must |
| 3622 | be read only (the -btextro linker option). AUTO_EXPORT_FLAGS |
| 3623 | is a mask of XCOFF_EXPALL and XCOFF_EXPFULL. SPECIAL_SECTIONS |
| 3624 | is set by this routine to csects with magic names like _end. */ |
| 3625 | |
| 3626 | bfd_boolean |
| 3627 | bfd_xcoff_size_dynamic_sections (bfd *output_bfd, |
| 3628 | struct bfd_link_info *info, |
| 3629 | const char *libpath, |
| 3630 | const char *entry, |
| 3631 | unsigned long file_align, |
| 3632 | unsigned long maxstack, |
| 3633 | unsigned long maxdata, |
| 3634 | bfd_boolean gc, |
| 3635 | int modtype, |
| 3636 | bfd_boolean textro, |
| 3637 | unsigned int auto_export_flags, |
| 3638 | asection **special_sections, |
| 3639 | bfd_boolean rtld) |
| 3640 | { |
| 3641 | struct xcoff_loader_info ldinfo; |
| 3642 | int i; |
| 3643 | asection *sec; |
| 3644 | bfd *sub; |
| 3645 | struct bfd_strtab_hash *debug_strtab; |
| 3646 | bfd_byte *debug_contents = NULL; |
| 3647 | size_t amt; |
| 3648 | |
| 3649 | if (bfd_get_flavour (output_bfd) != bfd_target_xcoff_flavour) |
| 3650 | { |
| 3651 | for (i = 0; i < XCOFF_NUMBER_OF_SPECIAL_SECTIONS; i++) |
| 3652 | special_sections[i] = NULL; |
| 3653 | return TRUE; |
| 3654 | } |
| 3655 | |
| 3656 | ldinfo.failed = FALSE; |
| 3657 | ldinfo.output_bfd = output_bfd; |
| 3658 | ldinfo.info = info; |
| 3659 | ldinfo.auto_export_flags = auto_export_flags; |
| 3660 | ldinfo.ldsym_count = 0; |
| 3661 | ldinfo.string_size = 0; |
| 3662 | ldinfo.strings = NULL; |
| 3663 | ldinfo.string_alc = 0; |
| 3664 | |
| 3665 | xcoff_data (output_bfd)->maxstack = maxstack; |
| 3666 | xcoff_data (output_bfd)->maxdata = maxdata; |
| 3667 | xcoff_data (output_bfd)->modtype = modtype; |
| 3668 | |
| 3669 | xcoff_hash_table (info)->file_align = file_align; |
| 3670 | xcoff_hash_table (info)->textro = textro; |
| 3671 | xcoff_hash_table (info)->rtld = rtld; |
| 3672 | |
| 3673 | /* __rtinit */ |
| 3674 | if (xcoff_hash_table (info)->loader_section |
| 3675 | && (info->init_function || info->fini_function || rtld)) |
| 3676 | { |
| 3677 | struct xcoff_link_hash_entry *hsym; |
| 3678 | struct internal_ldsym *ldsym; |
| 3679 | |
| 3680 | hsym = xcoff_link_hash_lookup (xcoff_hash_table (info), |
| 3681 | "__rtinit", FALSE, FALSE, TRUE); |
| 3682 | if (hsym == NULL) |
| 3683 | { |
| 3684 | _bfd_error_handler |
| 3685 | (_("error: undefined symbol __rtinit")); |
| 3686 | return FALSE; |
| 3687 | } |
| 3688 | |
| 3689 | xcoff_mark_symbol (info, hsym); |
| 3690 | hsym->flags |= (XCOFF_DEF_REGULAR | XCOFF_RTINIT); |
| 3691 | |
| 3692 | /* __rtinit initialized. */ |
| 3693 | amt = sizeof (* ldsym); |
| 3694 | ldsym = bfd_malloc (amt); |
| 3695 | |
| 3696 | ldsym->l_value = 0; /* Will be filled in later. */ |
| 3697 | ldsym->l_scnum = 2; /* Data section. */ |
| 3698 | ldsym->l_smtype = XTY_SD; /* Csect section definition. */ |
| 3699 | ldsym->l_smclas = 5; /* .rw. */ |
| 3700 | ldsym->l_ifile = 0; /* Special system loader symbol. */ |
| 3701 | ldsym->l_parm = 0; /* NA. */ |
| 3702 | |
| 3703 | /* Force __rtinit to be the first symbol in the loader symbol table |
| 3704 | See xcoff_build_ldsyms |
| 3705 | |
| 3706 | The first 3 symbol table indices are reserved to indicate the data, |
| 3707 | text and bss sections. */ |
| 3708 | BFD_ASSERT (0 == ldinfo.ldsym_count); |
| 3709 | |
| 3710 | hsym->ldindx = 3; |
| 3711 | ldinfo.ldsym_count = 1; |
| 3712 | hsym->ldsym = ldsym; |
| 3713 | |
| 3714 | if (! bfd_xcoff_put_ldsymbol_name (ldinfo.output_bfd, &ldinfo, |
| 3715 | hsym->ldsym, hsym->root.root.string)) |
| 3716 | return FALSE; |
| 3717 | |
| 3718 | /* This symbol is written out by xcoff_write_global_symbol |
| 3719 | Set stuff up so xcoff_write_global_symbol logic works. */ |
| 3720 | hsym->flags |= XCOFF_DEF_REGULAR | XCOFF_MARK; |
| 3721 | hsym->root.type = bfd_link_hash_defined; |
| 3722 | hsym->root.u.def.value = 0; |
| 3723 | } |
| 3724 | |
| 3725 | /* Garbage collect unused sections. */ |
| 3726 | if (bfd_link_relocatable (info) || !gc) |
| 3727 | { |
| 3728 | gc = FALSE; |
| 3729 | xcoff_hash_table (info)->gc = FALSE; |
| 3730 | |
| 3731 | /* We still need to call xcoff_mark, in order to set ldrel_count |
| 3732 | correctly. */ |
| 3733 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
| 3734 | { |
| 3735 | asection *o; |
| 3736 | |
| 3737 | for (o = sub->sections; o != NULL; o = o->next) |
| 3738 | { |
| 3739 | /* We shouldn't unconditionaly mark the TOC section. |
| 3740 | The output file should only have a TOC if either |
| 3741 | (a) one of the input files did or (b) we end up |
| 3742 | creating TOC references as part of the link process. */ |
| 3743 | if (o != xcoff_hash_table (info)->toc_section |
| 3744 | && (o->flags & SEC_MARK) == 0) |
| 3745 | { |
| 3746 | if (! xcoff_mark (info, o)) |
| 3747 | goto error_return; |
| 3748 | } |
| 3749 | } |
| 3750 | } |
| 3751 | } |
| 3752 | else |
| 3753 | { |
| 3754 | if (entry != NULL |
| 3755 | && !xcoff_mark_symbol_by_name (info, entry, XCOFF_ENTRY)) |
| 3756 | goto error_return; |
| 3757 | if (info->init_function != NULL |
| 3758 | && !xcoff_mark_symbol_by_name (info, info->init_function, 0)) |
| 3759 | goto error_return; |
| 3760 | if (info->fini_function != NULL |
| 3761 | && !xcoff_mark_symbol_by_name (info, info->fini_function, 0)) |
| 3762 | goto error_return; |
| 3763 | if (auto_export_flags != 0) |
| 3764 | { |
| 3765 | xcoff_link_hash_traverse (xcoff_hash_table (info), |
| 3766 | xcoff_mark_auto_exports, &ldinfo); |
| 3767 | if (ldinfo.failed) |
| 3768 | goto error_return; |
| 3769 | } |
| 3770 | xcoff_sweep (info); |
| 3771 | xcoff_hash_table (info)->gc = TRUE; |
| 3772 | } |
| 3773 | |
| 3774 | /* Return special sections to the caller. */ |
| 3775 | for (i = 0; i < XCOFF_NUMBER_OF_SPECIAL_SECTIONS; i++) |
| 3776 | { |
| 3777 | sec = xcoff_hash_table (info)->special_sections[i]; |
| 3778 | |
| 3779 | if (sec != NULL |
| 3780 | && gc |
| 3781 | && (sec->flags & SEC_MARK) == 0) |
| 3782 | sec = NULL; |
| 3783 | |
| 3784 | special_sections[i] = sec; |
| 3785 | } |
| 3786 | |
| 3787 | if (info->input_bfds == NULL) |
| 3788 | /* I'm not sure what to do in this bizarre case. */ |
| 3789 | return TRUE; |
| 3790 | |
| 3791 | xcoff_link_hash_traverse (xcoff_hash_table (info), xcoff_post_gc_symbol, |
| 3792 | (void *) &ldinfo); |
| 3793 | if (ldinfo.failed) |
| 3794 | goto error_return; |
| 3795 | |
| 3796 | if (xcoff_hash_table (info)->loader_section |
| 3797 | && !xcoff_build_loader_section (&ldinfo, libpath)) |
| 3798 | goto error_return; |
| 3799 | |
| 3800 | /* Allocate space for the magic sections. */ |
| 3801 | sec = xcoff_hash_table (info)->linkage_section; |
| 3802 | if (sec->size > 0) |
| 3803 | { |
| 3804 | sec->contents = bfd_zalloc (output_bfd, sec->size); |
| 3805 | if (sec->contents == NULL) |
| 3806 | goto error_return; |
| 3807 | } |
| 3808 | sec = xcoff_hash_table (info)->toc_section; |
| 3809 | if (sec->size > 0) |
| 3810 | { |
| 3811 | sec->contents = bfd_zalloc (output_bfd, sec->size); |
| 3812 | if (sec->contents == NULL) |
| 3813 | goto error_return; |
| 3814 | } |
| 3815 | sec = xcoff_hash_table (info)->descriptor_section; |
| 3816 | if (sec->size > 0) |
| 3817 | { |
| 3818 | sec->contents = bfd_zalloc (output_bfd, sec->size); |
| 3819 | if (sec->contents == NULL) |
| 3820 | goto error_return; |
| 3821 | } |
| 3822 | |
| 3823 | /* Now that we've done garbage collection, decide which symbols to keep, |
| 3824 | and figure out the contents of the .debug section. */ |
| 3825 | debug_strtab = xcoff_hash_table (info)->debug_strtab; |
| 3826 | |
| 3827 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
| 3828 | { |
| 3829 | asection *subdeb; |
| 3830 | bfd_size_type symcount; |
| 3831 | long *debug_index; |
| 3832 | asection **csectpp; |
| 3833 | unsigned int *lineno_counts; |
| 3834 | struct xcoff_link_hash_entry **sym_hash; |
| 3835 | bfd_byte *esym, *esymend; |
| 3836 | bfd_size_type symesz; |
| 3837 | |
| 3838 | if (sub->xvec != info->output_bfd->xvec) |
| 3839 | continue; |
| 3840 | |
| 3841 | if ((sub->flags & DYNAMIC) != 0 |
| 3842 | && !info->static_link) |
| 3843 | continue; |
| 3844 | |
| 3845 | if (! _bfd_coff_get_external_symbols (sub)) |
| 3846 | goto error_return; |
| 3847 | |
| 3848 | symcount = obj_raw_syment_count (sub); |
| 3849 | debug_index = bfd_zalloc (sub, symcount * sizeof (long)); |
| 3850 | if (debug_index == NULL) |
| 3851 | goto error_return; |
| 3852 | xcoff_data (sub)->debug_indices = debug_index; |
| 3853 | |
| 3854 | if (info->strip == strip_all |
| 3855 | || info->strip == strip_debugger |
| 3856 | || info->discard == discard_all) |
| 3857 | /* We're stripping all debugging information, so there's no need |
| 3858 | to read SUB's .debug section. */ |
| 3859 | subdeb = NULL; |
| 3860 | else |
| 3861 | { |
| 3862 | /* Grab the contents of SUB's .debug section, if any. */ |
| 3863 | subdeb = bfd_get_section_by_name (sub, ".debug"); |
| 3864 | if (subdeb != NULL && subdeb->size > 0) |
| 3865 | { |
| 3866 | /* We use malloc and copy the names into the debug |
| 3867 | stringtab, rather than bfd_alloc, because I expect |
| 3868 | that, when linking many files together, many of the |
| 3869 | strings will be the same. Storing the strings in the |
| 3870 | hash table should save space in this case. */ |
| 3871 | if (!bfd_malloc_and_get_section (sub, subdeb, &debug_contents)) |
| 3872 | goto error_return; |
| 3873 | } |
| 3874 | } |
| 3875 | |
| 3876 | csectpp = xcoff_data (sub)->csects; |
| 3877 | lineno_counts = xcoff_data (sub)->lineno_counts; |
| 3878 | sym_hash = obj_xcoff_sym_hashes (sub); |
| 3879 | symesz = bfd_coff_symesz (sub); |
| 3880 | esym = (bfd_byte *) obj_coff_external_syms (sub); |
| 3881 | esymend = esym + symcount * symesz; |
| 3882 | |
| 3883 | while (esym < esymend) |
| 3884 | { |
| 3885 | struct internal_syment sym; |
| 3886 | union internal_auxent aux; |
| 3887 | asection *csect; |
| 3888 | const char *name; |
| 3889 | int keep_p; |
| 3890 | |
| 3891 | bfd_coff_swap_sym_in (sub, esym, &sym); |
| 3892 | |
| 3893 | /* Read in the csect information, if any. */ |
| 3894 | if (CSECT_SYM_P (sym.n_sclass)) |
| 3895 | { |
| 3896 | BFD_ASSERT (sym.n_numaux > 0); |
| 3897 | bfd_coff_swap_aux_in (sub, esym + symesz * sym.n_numaux, |
| 3898 | sym.n_type, sym.n_sclass, |
| 3899 | sym.n_numaux - 1, sym.n_numaux, &aux); |
| 3900 | } |
| 3901 | |
| 3902 | /* If this symbol's name is stored in the debug section, |
| 3903 | get a pointer to it. */ |
| 3904 | if (debug_contents != NULL |
| 3905 | && sym._n._n_n._n_zeroes == 0 |
| 3906 | && bfd_coff_symname_in_debug (sub, &sym)) |
| 3907 | name = (const char *) debug_contents + sym._n._n_n._n_offset; |
| 3908 | else |
| 3909 | name = NULL; |
| 3910 | |
| 3911 | /* Decide whether to copy this symbol to the output file. */ |
| 3912 | csect = *csectpp; |
| 3913 | keep_p = xcoff_keep_symbol_p (info, sub, &sym, &aux, |
| 3914 | *sym_hash, csect, name); |
| 3915 | if (keep_p < 0) |
| 3916 | return FALSE; |
| 3917 | |
| 3918 | if (!keep_p) |
| 3919 | /* Use a debug_index of -2 to record that a symbol should |
| 3920 | be stripped. */ |
| 3921 | *debug_index = -2; |
| 3922 | else |
| 3923 | { |
| 3924 | /* See whether we should store the symbol name in the |
| 3925 | output .debug section. */ |
| 3926 | if (name != NULL) |
| 3927 | { |
| 3928 | bfd_size_type indx; |
| 3929 | |
| 3930 | indx = _bfd_stringtab_add (debug_strtab, name, TRUE, TRUE); |
| 3931 | if (indx == (bfd_size_type) -1) |
| 3932 | goto error_return; |
| 3933 | *debug_index = indx; |
| 3934 | } |
| 3935 | else |
| 3936 | *debug_index = -1; |
| 3937 | if (*sym_hash != 0) |
| 3938 | (*sym_hash)->flags |= XCOFF_ALLOCATED; |
| 3939 | if (*lineno_counts > 0) |
| 3940 | csect->output_section->lineno_count += *lineno_counts; |
| 3941 | } |
| 3942 | |
| 3943 | esym += (sym.n_numaux + 1) * symesz; |
| 3944 | csectpp += sym.n_numaux + 1; |
| 3945 | sym_hash += sym.n_numaux + 1; |
| 3946 | lineno_counts += sym.n_numaux + 1; |
| 3947 | debug_index += sym.n_numaux + 1; |
| 3948 | } |
| 3949 | |
| 3950 | if (debug_contents) |
| 3951 | { |
| 3952 | free (debug_contents); |
| 3953 | debug_contents = NULL; |
| 3954 | |
| 3955 | /* Clear the size of subdeb, so that it is not included directly |
| 3956 | in the output file. */ |
| 3957 | subdeb->size = 0; |
| 3958 | } |
| 3959 | |
| 3960 | if (! info->keep_memory) |
| 3961 | { |
| 3962 | if (! _bfd_coff_free_symbols (sub)) |
| 3963 | goto error_return; |
| 3964 | } |
| 3965 | } |
| 3966 | |
| 3967 | if (info->strip != strip_all) |
| 3968 | xcoff_hash_table (info)->debug_section->size = |
| 3969 | _bfd_stringtab_size (debug_strtab); |
| 3970 | |
| 3971 | return TRUE; |
| 3972 | |
| 3973 | error_return: |
| 3974 | if (ldinfo.strings != NULL) |
| 3975 | free (ldinfo.strings); |
| 3976 | if (debug_contents != NULL) |
| 3977 | free (debug_contents); |
| 3978 | return FALSE; |
| 3979 | } |
| 3980 | |
| 3981 | bfd_boolean |
| 3982 | bfd_xcoff_link_generate_rtinit (bfd *abfd, |
| 3983 | const char *init, |
| 3984 | const char *fini, |
| 3985 | bfd_boolean rtld) |
| 3986 | { |
| 3987 | struct bfd_in_memory *bim; |
| 3988 | |
| 3989 | bim = bfd_malloc ((bfd_size_type) sizeof (* bim)); |
| 3990 | if (bim == NULL) |
| 3991 | return FALSE; |
| 3992 | |
| 3993 | bim->size = 0; |
| 3994 | bim->buffer = 0; |
| 3995 | |
| 3996 | abfd->link.next = 0; |
| 3997 | abfd->format = bfd_object; |
| 3998 | abfd->iostream = (void *) bim; |
| 3999 | abfd->flags = BFD_IN_MEMORY; |
| 4000 | abfd->iovec = &_bfd_memory_iovec; |
| 4001 | abfd->direction = write_direction; |
| 4002 | abfd->origin = 0; |
| 4003 | abfd->where = 0; |
| 4004 | |
| 4005 | if (! bfd_xcoff_generate_rtinit (abfd, init, fini, rtld)) |
| 4006 | return FALSE; |
| 4007 | |
| 4008 | /* need to reset to unknown or it will not be read back in correctly */ |
| 4009 | abfd->format = bfd_unknown; |
| 4010 | abfd->direction = read_direction; |
| 4011 | abfd->where = 0; |
| 4012 | |
| 4013 | return TRUE; |
| 4014 | } |
| 4015 | \f |
| 4016 | /* Return the section that defines H. Return null if no section does. */ |
| 4017 | |
| 4018 | static asection * |
| 4019 | xcoff_symbol_section (struct xcoff_link_hash_entry *h) |
| 4020 | { |
| 4021 | switch (h->root.type) |
| 4022 | { |
| 4023 | case bfd_link_hash_defined: |
| 4024 | case bfd_link_hash_defweak: |
| 4025 | return h->root.u.def.section; |
| 4026 | |
| 4027 | case bfd_link_hash_common: |
| 4028 | return h->root.u.c.p->section; |
| 4029 | |
| 4030 | default: |
| 4031 | return NULL; |
| 4032 | } |
| 4033 | } |
| 4034 | |
| 4035 | /* Add a .loader relocation for input relocation IREL. If the loader |
| 4036 | relocation should be against an output section, HSEC points to the |
| 4037 | input section that IREL is against, otherwise HSEC is null. H is the |
| 4038 | symbol that IREL is against, or null if it isn't against a global symbol. |
| 4039 | REFERENCE_BFD is the bfd to use in error messages about the relocation. */ |
| 4040 | |
| 4041 | static bfd_boolean |
| 4042 | xcoff_create_ldrel (bfd *output_bfd, struct xcoff_final_link_info *flinfo, |
| 4043 | asection *output_section, bfd *reference_bfd, |
| 4044 | struct internal_reloc *irel, asection *hsec, |
| 4045 | struct xcoff_link_hash_entry *h) |
| 4046 | { |
| 4047 | struct internal_ldrel ldrel; |
| 4048 | |
| 4049 | ldrel.l_vaddr = irel->r_vaddr; |
| 4050 | if (hsec != NULL) |
| 4051 | { |
| 4052 | const char *secname; |
| 4053 | |
| 4054 | secname = hsec->output_section->name; |
| 4055 | if (strcmp (secname, ".text") == 0) |
| 4056 | ldrel.l_symndx = 0; |
| 4057 | else if (strcmp (secname, ".data") == 0) |
| 4058 | ldrel.l_symndx = 1; |
| 4059 | else if (strcmp (secname, ".bss") == 0) |
| 4060 | ldrel.l_symndx = 2; |
| 4061 | else |
| 4062 | { |
| 4063 | _bfd_error_handler |
| 4064 | /* xgettext:c-format */ |
| 4065 | (_("%pB: loader reloc in unrecognized section `%s'"), |
| 4066 | reference_bfd, secname); |
| 4067 | bfd_set_error (bfd_error_nonrepresentable_section); |
| 4068 | return FALSE; |
| 4069 | } |
| 4070 | } |
| 4071 | else if (h != NULL) |
| 4072 | { |
| 4073 | if (h->ldindx < 0) |
| 4074 | { |
| 4075 | _bfd_error_handler |
| 4076 | /* xgettext:c-format */ |
| 4077 | (_("%pB: `%s' in loader reloc but not loader sym"), |
| 4078 | reference_bfd, h->root.root.string); |
| 4079 | bfd_set_error (bfd_error_bad_value); |
| 4080 | return FALSE; |
| 4081 | } |
| 4082 | ldrel.l_symndx = h->ldindx; |
| 4083 | } |
| 4084 | else |
| 4085 | ldrel.l_symndx = -(bfd_size_type) 1; |
| 4086 | |
| 4087 | ldrel.l_rtype = (irel->r_size << 8) | irel->r_type; |
| 4088 | ldrel.l_rsecnm = output_section->target_index; |
| 4089 | if (xcoff_hash_table (flinfo->info)->textro |
| 4090 | && strcmp (output_section->name, ".text") == 0) |
| 4091 | { |
| 4092 | _bfd_error_handler |
| 4093 | /* xgettext:c-format */ |
| 4094 | (_("%pB: loader reloc in read-only section %pA"), |
| 4095 | reference_bfd, output_section); |
| 4096 | bfd_set_error (bfd_error_invalid_operation); |
| 4097 | return FALSE; |
| 4098 | } |
| 4099 | bfd_xcoff_swap_ldrel_out (output_bfd, &ldrel, flinfo->ldrel); |
| 4100 | flinfo->ldrel += bfd_xcoff_ldrelsz (output_bfd); |
| 4101 | return TRUE; |
| 4102 | } |
| 4103 | |
| 4104 | /* Link an input file into the linker output file. This function |
| 4105 | handles all the sections and relocations of the input file at once. */ |
| 4106 | |
| 4107 | static bfd_boolean |
| 4108 | xcoff_link_input_bfd (struct xcoff_final_link_info *flinfo, |
| 4109 | bfd *input_bfd) |
| 4110 | { |
| 4111 | bfd *output_bfd; |
| 4112 | const char *strings; |
| 4113 | bfd_size_type syment_base; |
| 4114 | unsigned int n_tmask; |
| 4115 | unsigned int n_btshft; |
| 4116 | bfd_boolean copy, hash; |
| 4117 | bfd_size_type isymesz; |
| 4118 | bfd_size_type osymesz; |
| 4119 | bfd_size_type linesz; |
| 4120 | bfd_byte *esym; |
| 4121 | bfd_byte *esym_end; |
| 4122 | struct xcoff_link_hash_entry **sym_hash; |
| 4123 | struct internal_syment *isymp; |
| 4124 | asection **csectpp; |
| 4125 | unsigned int *lineno_counts; |
| 4126 | long *debug_index; |
| 4127 | long *indexp; |
| 4128 | unsigned long output_index; |
| 4129 | bfd_byte *outsym; |
| 4130 | unsigned int incls; |
| 4131 | asection *oline; |
| 4132 | bfd_boolean keep_syms; |
| 4133 | asection *o; |
| 4134 | |
| 4135 | /* We can just skip DYNAMIC files, unless this is a static link. */ |
| 4136 | if ((input_bfd->flags & DYNAMIC) != 0 |
| 4137 | && ! flinfo->info->static_link) |
| 4138 | return TRUE; |
| 4139 | |
| 4140 | /* Move all the symbols to the output file. */ |
| 4141 | output_bfd = flinfo->output_bfd; |
| 4142 | strings = NULL; |
| 4143 | syment_base = obj_raw_syment_count (output_bfd); |
| 4144 | isymesz = bfd_coff_symesz (input_bfd); |
| 4145 | osymesz = bfd_coff_symesz (output_bfd); |
| 4146 | linesz = bfd_coff_linesz (input_bfd); |
| 4147 | BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd)); |
| 4148 | |
| 4149 | n_tmask = coff_data (input_bfd)->local_n_tmask; |
| 4150 | n_btshft = coff_data (input_bfd)->local_n_btshft; |
| 4151 | |
| 4152 | /* Define macros so that ISFCN, et. al., macros work correctly. */ |
| 4153 | #define N_TMASK n_tmask |
| 4154 | #define N_BTSHFT n_btshft |
| 4155 | |
| 4156 | copy = FALSE; |
| 4157 | if (! flinfo->info->keep_memory) |
| 4158 | copy = TRUE; |
| 4159 | hash = TRUE; |
| 4160 | if (flinfo->info->traditional_format) |
| 4161 | hash = FALSE; |
| 4162 | |
| 4163 | if (! _bfd_coff_get_external_symbols (input_bfd)) |
| 4164 | return FALSE; |
| 4165 | |
| 4166 | /* Make one pass over the symbols and assign indices to symbols that |
| 4167 | we have decided to keep. Also use create .loader symbol information |
| 4168 | and update information in hash table entries. */ |
| 4169 | esym = (bfd_byte *) obj_coff_external_syms (input_bfd); |
| 4170 | esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz; |
| 4171 | sym_hash = obj_xcoff_sym_hashes (input_bfd); |
| 4172 | csectpp = xcoff_data (input_bfd)->csects; |
| 4173 | debug_index = xcoff_data (input_bfd)->debug_indices; |
| 4174 | isymp = flinfo->internal_syms; |
| 4175 | indexp = flinfo->sym_indices; |
| 4176 | output_index = syment_base; |
| 4177 | while (esym < esym_end) |
| 4178 | { |
| 4179 | union internal_auxent aux; |
| 4180 | int smtyp = 0; |
| 4181 | int add; |
| 4182 | |
| 4183 | bfd_coff_swap_sym_in (input_bfd, (void *) esym, (void *) isymp); |
| 4184 | |
| 4185 | /* Read in the csect information, if any. */ |
| 4186 | if (CSECT_SYM_P (isymp->n_sclass)) |
| 4187 | { |
| 4188 | BFD_ASSERT (isymp->n_numaux > 0); |
| 4189 | bfd_coff_swap_aux_in (input_bfd, |
| 4190 | (void *) (esym + isymesz * isymp->n_numaux), |
| 4191 | isymp->n_type, isymp->n_sclass, |
| 4192 | isymp->n_numaux - 1, isymp->n_numaux, |
| 4193 | (void *) &aux); |
| 4194 | |
| 4195 | smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp); |
| 4196 | } |
| 4197 | |
| 4198 | /* If this symbol is in the .loader section, swap out the |
| 4199 | .loader symbol information. If this is an external symbol |
| 4200 | reference to a defined symbol, though, then wait until we get |
| 4201 | to the definition. */ |
| 4202 | if (EXTERN_SYM_P (isymp->n_sclass) |
| 4203 | && *sym_hash != NULL |
| 4204 | && (*sym_hash)->ldsym != NULL |
| 4205 | && xcoff_final_definition_p (input_bfd, *sym_hash, *csectpp)) |
| 4206 | { |
| 4207 | struct xcoff_link_hash_entry *h; |
| 4208 | struct internal_ldsym *ldsym; |
| 4209 | |
| 4210 | h = *sym_hash; |
| 4211 | ldsym = h->ldsym; |
| 4212 | if (isymp->n_scnum > 0) |
| 4213 | { |
| 4214 | ldsym->l_scnum = (*csectpp)->output_section->target_index; |
| 4215 | ldsym->l_value = (isymp->n_value |
| 4216 | + (*csectpp)->output_section->vma |
| 4217 | + (*csectpp)->output_offset |
| 4218 | - (*csectpp)->vma); |
| 4219 | } |
| 4220 | else |
| 4221 | { |
| 4222 | ldsym->l_scnum = isymp->n_scnum; |
| 4223 | ldsym->l_value = isymp->n_value; |
| 4224 | } |
| 4225 | |
| 4226 | ldsym->l_smtype = smtyp; |
| 4227 | if (((h->flags & XCOFF_DEF_REGULAR) == 0 |
| 4228 | && (h->flags & XCOFF_DEF_DYNAMIC) != 0) |
| 4229 | || (h->flags & XCOFF_IMPORT) != 0) |
| 4230 | ldsym->l_smtype |= L_IMPORT; |
| 4231 | if (((h->flags & XCOFF_DEF_REGULAR) != 0 |
| 4232 | && (h->flags & XCOFF_DEF_DYNAMIC) != 0) |
| 4233 | || (h->flags & XCOFF_EXPORT) != 0) |
| 4234 | ldsym->l_smtype |= L_EXPORT; |
| 4235 | if ((h->flags & XCOFF_ENTRY) != 0) |
| 4236 | ldsym->l_smtype |= L_ENTRY; |
| 4237 | if (isymp->n_sclass == C_AIX_WEAKEXT) |
| 4238 | ldsym->l_smtype |= L_WEAK; |
| 4239 | |
| 4240 | ldsym->l_smclas = aux.x_csect.x_smclas; |
| 4241 | |
| 4242 | if (ldsym->l_ifile == (bfd_size_type) -1) |
| 4243 | ldsym->l_ifile = 0; |
| 4244 | else if (ldsym->l_ifile == 0) |
| 4245 | { |
| 4246 | if ((ldsym->l_smtype & L_IMPORT) == 0) |
| 4247 | ldsym->l_ifile = 0; |
| 4248 | else |
| 4249 | { |
| 4250 | bfd *impbfd; |
| 4251 | |
| 4252 | if (h->root.type == bfd_link_hash_defined |
| 4253 | || h->root.type == bfd_link_hash_defweak) |
| 4254 | impbfd = h->root.u.def.section->owner; |
| 4255 | else if (h->root.type == bfd_link_hash_undefined |
| 4256 | || h->root.type == bfd_link_hash_undefweak) |
| 4257 | impbfd = h->root.u.undef.abfd; |
| 4258 | else |
| 4259 | impbfd = NULL; |
| 4260 | |
| 4261 | if (impbfd == NULL) |
| 4262 | ldsym->l_ifile = 0; |
| 4263 | else |
| 4264 | { |
| 4265 | BFD_ASSERT (impbfd->xvec == flinfo->output_bfd->xvec); |
| 4266 | ldsym->l_ifile = xcoff_data (impbfd)->import_file_id; |
| 4267 | } |
| 4268 | } |
| 4269 | } |
| 4270 | |
| 4271 | ldsym->l_parm = 0; |
| 4272 | |
| 4273 | BFD_ASSERT (h->ldindx >= 0); |
| 4274 | bfd_xcoff_swap_ldsym_out (flinfo->output_bfd, ldsym, |
| 4275 | (flinfo->ldsym |
| 4276 | + ((h->ldindx - 3) |
| 4277 | * bfd_xcoff_ldsymsz (flinfo->output_bfd)))); |
| 4278 | h->ldsym = NULL; |
| 4279 | |
| 4280 | /* Fill in snentry now that we know the target_index. */ |
| 4281 | if ((h->flags & XCOFF_ENTRY) != 0 |
| 4282 | && (h->root.type == bfd_link_hash_defined |
| 4283 | || h->root.type == bfd_link_hash_defweak)) |
| 4284 | { |
| 4285 | xcoff_data (output_bfd)->snentry = |
| 4286 | h->root.u.def.section->output_section->target_index; |
| 4287 | } |
| 4288 | } |
| 4289 | |
| 4290 | add = 1 + isymp->n_numaux; |
| 4291 | |
| 4292 | if (*debug_index == -2) |
| 4293 | /* We've decided to strip this symbol. */ |
| 4294 | *indexp = -1; |
| 4295 | else |
| 4296 | { |
| 4297 | /* Assign the next unused index to this symbol. */ |
| 4298 | *indexp = output_index; |
| 4299 | |
| 4300 | if (EXTERN_SYM_P (isymp->n_sclass)) |
| 4301 | { |
| 4302 | BFD_ASSERT (*sym_hash != NULL); |
| 4303 | (*sym_hash)->indx = output_index; |
| 4304 | } |
| 4305 | |
| 4306 | /* If this is a symbol in the TOC which we may have merged |
| 4307 | (class XMC_TC), remember the symbol index of the TOC |
| 4308 | symbol. */ |
| 4309 | if (isymp->n_sclass == C_HIDEXT |
| 4310 | && aux.x_csect.x_smclas == XMC_TC |
| 4311 | && *sym_hash != NULL) |
| 4312 | { |
| 4313 | BFD_ASSERT (((*sym_hash)->flags & XCOFF_SET_TOC) == 0); |
| 4314 | BFD_ASSERT ((*sym_hash)->toc_section != NULL); |
| 4315 | (*sym_hash)->u.toc_indx = output_index; |
| 4316 | } |
| 4317 | |
| 4318 | output_index += add; |
| 4319 | } |
| 4320 | |
| 4321 | esym += add * isymesz; |
| 4322 | isymp += add; |
| 4323 | csectpp += add; |
| 4324 | sym_hash += add; |
| 4325 | debug_index += add; |
| 4326 | ++indexp; |
| 4327 | for (--add; add > 0; --add) |
| 4328 | *indexp++ = -1; |
| 4329 | } |
| 4330 | |
| 4331 | /* Now write out the symbols that we decided to keep. */ |
| 4332 | |
| 4333 | esym = (bfd_byte *) obj_coff_external_syms (input_bfd); |
| 4334 | esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz; |
| 4335 | sym_hash = obj_xcoff_sym_hashes (input_bfd); |
| 4336 | isymp = flinfo->internal_syms; |
| 4337 | indexp = flinfo->sym_indices; |
| 4338 | csectpp = xcoff_data (input_bfd)->csects; |
| 4339 | lineno_counts = xcoff_data (input_bfd)->lineno_counts; |
| 4340 | debug_index = xcoff_data (input_bfd)->debug_indices; |
| 4341 | outsym = flinfo->outsyms; |
| 4342 | incls = 0; |
| 4343 | oline = NULL; |
| 4344 | while (esym < esym_end) |
| 4345 | { |
| 4346 | int add; |
| 4347 | |
| 4348 | add = 1 + isymp->n_numaux; |
| 4349 | |
| 4350 | if (*indexp < 0) |
| 4351 | esym += add * isymesz; |
| 4352 | else |
| 4353 | { |
| 4354 | struct internal_syment isym; |
| 4355 | int i; |
| 4356 | |
| 4357 | /* Adjust the symbol in order to output it. */ |
| 4358 | isym = *isymp; |
| 4359 | if (isym._n._n_n._n_zeroes == 0 |
| 4360 | && isym._n._n_n._n_offset != 0) |
| 4361 | { |
| 4362 | /* This symbol has a long name. Enter it in the string |
| 4363 | table we are building. If *debug_index != -1, the |
| 4364 | name has already been entered in the .debug section. */ |
| 4365 | if (*debug_index >= 0) |
| 4366 | isym._n._n_n._n_offset = *debug_index; |
| 4367 | else |
| 4368 | { |
| 4369 | const char *name; |
| 4370 | bfd_size_type indx; |
| 4371 | |
| 4372 | name = _bfd_coff_internal_syment_name (input_bfd, &isym, NULL); |
| 4373 | |
| 4374 | if (name == NULL) |
| 4375 | return FALSE; |
| 4376 | indx = _bfd_stringtab_add (flinfo->strtab, name, hash, copy); |
| 4377 | if (indx == (bfd_size_type) -1) |
| 4378 | return FALSE; |
| 4379 | isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; |
| 4380 | } |
| 4381 | } |
| 4382 | |
| 4383 | /* Make __rtinit C_HIDEXT rather than C_EXT. This avoids |
| 4384 | multiple definition problems when linking a shared object |
| 4385 | statically. (The native linker doesn't enter __rtinit into |
| 4386 | the normal table at all, but having a local symbol can make |
| 4387 | the objdump output easier to read.) */ |
| 4388 | if (isym.n_sclass == C_EXT |
| 4389 | && *sym_hash |
| 4390 | && ((*sym_hash)->flags & XCOFF_RTINIT) != 0) |
| 4391 | isym.n_sclass = C_HIDEXT; |
| 4392 | |
| 4393 | /* The value of a C_FILE symbol is the symbol index of the |
| 4394 | next C_FILE symbol. The value of the last C_FILE symbol |
| 4395 | is -1. We try to get this right, below, just before we |
| 4396 | write the symbols out, but in the general case we may |
| 4397 | have to write the symbol out twice. */ |
| 4398 | if (isym.n_sclass == C_FILE) |
| 4399 | { |
| 4400 | if (flinfo->last_file_index != -1 |
| 4401 | && flinfo->last_file.n_value != (bfd_vma) *indexp) |
| 4402 | { |
| 4403 | /* We must correct the value of the last C_FILE entry. */ |
| 4404 | flinfo->last_file.n_value = *indexp; |
| 4405 | if ((bfd_size_type) flinfo->last_file_index >= syment_base) |
| 4406 | { |
| 4407 | /* The last C_FILE symbol is in this input file. */ |
| 4408 | bfd_coff_swap_sym_out (output_bfd, |
| 4409 | (void *) &flinfo->last_file, |
| 4410 | (void *) (flinfo->outsyms |
| 4411 | + ((flinfo->last_file_index |
| 4412 | - syment_base) |
| 4413 | * osymesz))); |
| 4414 | } |
| 4415 | else |
| 4416 | { |
| 4417 | /* We have already written out the last C_FILE |
| 4418 | symbol. We need to write it out again. We |
| 4419 | borrow *outsym temporarily. */ |
| 4420 | file_ptr pos; |
| 4421 | |
| 4422 | bfd_coff_swap_sym_out (output_bfd, |
| 4423 | (void *) &flinfo->last_file, |
| 4424 | (void *) outsym); |
| 4425 | |
| 4426 | pos = obj_sym_filepos (output_bfd); |
| 4427 | pos += flinfo->last_file_index * osymesz; |
| 4428 | if (bfd_seek (output_bfd, pos, SEEK_SET) != 0 |
| 4429 | || (bfd_bwrite (outsym, osymesz, output_bfd) |
| 4430 | != osymesz)) |
| 4431 | return FALSE; |
| 4432 | } |
| 4433 | } |
| 4434 | |
| 4435 | flinfo->last_file_index = *indexp; |
| 4436 | flinfo->last_file = isym; |
| 4437 | } |
| 4438 | |
| 4439 | /* The value of a C_BINCL or C_EINCL symbol is a file offset |
| 4440 | into the line numbers. We update the symbol values when |
| 4441 | we handle the line numbers. */ |
| 4442 | if (isym.n_sclass == C_BINCL |
| 4443 | || isym.n_sclass == C_EINCL) |
| 4444 | { |
| 4445 | isym.n_value = flinfo->line_filepos; |
| 4446 | ++incls; |
| 4447 | } |
| 4448 | /* The value of a C_BSTAT symbol is the symbol table |
| 4449 | index of the containing csect. */ |
| 4450 | else if (isym.n_sclass == C_BSTAT) |
| 4451 | { |
| 4452 | bfd_vma indx; |
| 4453 | |
| 4454 | indx = isym.n_value; |
| 4455 | if (indx < obj_raw_syment_count (input_bfd)) |
| 4456 | { |
| 4457 | long symindx; |
| 4458 | |
| 4459 | symindx = flinfo->sym_indices[indx]; |
| 4460 | if (symindx < 0) |
| 4461 | isym.n_value = 0; |
| 4462 | else |
| 4463 | isym.n_value = symindx; |
| 4464 | } |
| 4465 | } |
| 4466 | else if (isym.n_sclass != C_ESTAT |
| 4467 | && isym.n_sclass != C_DECL |
| 4468 | && isym.n_scnum > 0) |
| 4469 | { |
| 4470 | isym.n_scnum = (*csectpp)->output_section->target_index; |
| 4471 | isym.n_value += ((*csectpp)->output_section->vma |
| 4472 | + (*csectpp)->output_offset |
| 4473 | - (*csectpp)->vma); |
| 4474 | } |
| 4475 | |
| 4476 | /* Output the symbol. */ |
| 4477 | bfd_coff_swap_sym_out (output_bfd, (void *) &isym, (void *) outsym); |
| 4478 | |
| 4479 | esym += isymesz; |
| 4480 | outsym += osymesz; |
| 4481 | |
| 4482 | for (i = 0; i < isymp->n_numaux && esym < esym_end; i++) |
| 4483 | { |
| 4484 | union internal_auxent aux; |
| 4485 | |
| 4486 | bfd_coff_swap_aux_in (input_bfd, (void *) esym, isymp->n_type, |
| 4487 | isymp->n_sclass, i, isymp->n_numaux, |
| 4488 | (void *) &aux); |
| 4489 | |
| 4490 | if (isymp->n_sclass == C_FILE) |
| 4491 | { |
| 4492 | /* This is the file name (or some comment put in by |
| 4493 | the compiler). If it is long, we must put it in |
| 4494 | the string table. */ |
| 4495 | if (aux.x_file.x_n.x_zeroes == 0 |
| 4496 | && aux.x_file.x_n.x_offset != 0) |
| 4497 | { |
| 4498 | const char *filename; |
| 4499 | bfd_size_type indx; |
| 4500 | |
| 4501 | BFD_ASSERT (aux.x_file.x_n.x_offset |
| 4502 | >= STRING_SIZE_SIZE); |
| 4503 | if (strings == NULL) |
| 4504 | { |
| 4505 | strings = _bfd_coff_read_string_table (input_bfd); |
| 4506 | if (strings == NULL) |
| 4507 | return FALSE; |
| 4508 | } |
| 4509 | if ((bfd_size_type) aux.x_file.x_n.x_offset >= obj_coff_strings_len (input_bfd)) |
| 4510 | filename = _("<corrupt>"); |
| 4511 | else |
| 4512 | filename = strings + aux.x_file.x_n.x_offset; |
| 4513 | indx = _bfd_stringtab_add (flinfo->strtab, filename, |
| 4514 | hash, copy); |
| 4515 | if (indx == (bfd_size_type) -1) |
| 4516 | return FALSE; |
| 4517 | aux.x_file.x_n.x_offset = STRING_SIZE_SIZE + indx; |
| 4518 | } |
| 4519 | } |
| 4520 | else if (CSECT_SYM_P (isymp->n_sclass) |
| 4521 | && i + 1 == isymp->n_numaux) |
| 4522 | { |
| 4523 | |
| 4524 | /* We don't support type checking. I don't know if |
| 4525 | anybody does. */ |
| 4526 | aux.x_csect.x_parmhash = 0; |
| 4527 | /* I don't think anybody uses these fields, but we'd |
| 4528 | better clobber them just in case. */ |
| 4529 | aux.x_csect.x_stab = 0; |
| 4530 | aux.x_csect.x_snstab = 0; |
| 4531 | |
| 4532 | if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_LD) |
| 4533 | { |
| 4534 | unsigned long indx; |
| 4535 | |
| 4536 | indx = aux.x_csect.x_scnlen.l; |
| 4537 | if (indx < obj_raw_syment_count (input_bfd)) |
| 4538 | { |
| 4539 | long symindx; |
| 4540 | |
| 4541 | symindx = flinfo->sym_indices[indx]; |
| 4542 | if (symindx < 0) |
| 4543 | { |
| 4544 | aux.x_csect.x_scnlen.l = 0; |
| 4545 | } |
| 4546 | else |
| 4547 | { |
| 4548 | aux.x_csect.x_scnlen.l = symindx; |
| 4549 | } |
| 4550 | } |
| 4551 | } |
| 4552 | } |
| 4553 | else if (isymp->n_sclass != C_STAT || isymp->n_type != T_NULL) |
| 4554 | { |
| 4555 | unsigned long indx; |
| 4556 | |
| 4557 | if (ISFCN (isymp->n_type) |
| 4558 | || ISTAG (isymp->n_sclass) |
| 4559 | || isymp->n_sclass == C_BLOCK |
| 4560 | || isymp->n_sclass == C_FCN) |
| 4561 | { |
| 4562 | indx = aux.x_sym.x_fcnary.x_fcn.x_endndx.l; |
| 4563 | if (indx > 0 |
| 4564 | && indx < obj_raw_syment_count (input_bfd)) |
| 4565 | { |
| 4566 | /* We look forward through the symbol for |
| 4567 | the index of the next symbol we are going |
| 4568 | to include. I don't know if this is |
| 4569 | entirely right. */ |
| 4570 | while (flinfo->sym_indices[indx] < 0 |
| 4571 | && indx < obj_raw_syment_count (input_bfd)) |
| 4572 | ++indx; |
| 4573 | if (indx >= obj_raw_syment_count (input_bfd)) |
| 4574 | indx = output_index; |
| 4575 | else |
| 4576 | indx = flinfo->sym_indices[indx]; |
| 4577 | aux.x_sym.x_fcnary.x_fcn.x_endndx.l = indx; |
| 4578 | |
| 4579 | } |
| 4580 | } |
| 4581 | |
| 4582 | indx = aux.x_sym.x_tagndx.l; |
| 4583 | if (indx > 0 && indx < obj_raw_syment_count (input_bfd)) |
| 4584 | { |
| 4585 | long symindx; |
| 4586 | |
| 4587 | symindx = flinfo->sym_indices[indx]; |
| 4588 | if (symindx < 0) |
| 4589 | aux.x_sym.x_tagndx.l = 0; |
| 4590 | else |
| 4591 | aux.x_sym.x_tagndx.l = symindx; |
| 4592 | } |
| 4593 | |
| 4594 | } |
| 4595 | |
| 4596 | /* Copy over the line numbers, unless we are stripping |
| 4597 | them. We do this on a symbol by symbol basis in |
| 4598 | order to more easily handle garbage collection. */ |
| 4599 | if (CSECT_SYM_P (isymp->n_sclass) |
| 4600 | && i == 0 |
| 4601 | && isymp->n_numaux > 1 |
| 4602 | && ISFCN (isymp->n_type) |
| 4603 | && aux.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0) |
| 4604 | { |
| 4605 | if (*lineno_counts == 0) |
| 4606 | aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0; |
| 4607 | else |
| 4608 | { |
| 4609 | asection *enclosing; |
| 4610 | unsigned int enc_count; |
| 4611 | bfd_signed_vma linoff; |
| 4612 | struct internal_lineno lin; |
| 4613 | bfd_byte *linp; |
| 4614 | bfd_byte *linpend; |
| 4615 | bfd_vma offset; |
| 4616 | file_ptr pos; |
| 4617 | bfd_size_type amt; |
| 4618 | |
| 4619 | /* Read in the enclosing section's line-number |
| 4620 | information, if we haven't already. */ |
| 4621 | o = *csectpp; |
| 4622 | enclosing = xcoff_section_data (abfd, o)->enclosing; |
| 4623 | enc_count = xcoff_section_data (abfd, o)->lineno_count; |
| 4624 | if (oline != enclosing) |
| 4625 | { |
| 4626 | pos = enclosing->line_filepos; |
| 4627 | amt = linesz * enc_count; |
| 4628 | if (bfd_seek (input_bfd, pos, SEEK_SET) != 0 |
| 4629 | || (bfd_bread (flinfo->linenos, amt, input_bfd) |
| 4630 | != amt)) |
| 4631 | return FALSE; |
| 4632 | oline = enclosing; |
| 4633 | } |
| 4634 | |
| 4635 | /* Copy across the first entry, adjusting its |
| 4636 | symbol index. */ |
| 4637 | linoff = (aux.x_sym.x_fcnary.x_fcn.x_lnnoptr |
| 4638 | - enclosing->line_filepos); |
| 4639 | linp = flinfo->linenos + linoff; |
| 4640 | bfd_coff_swap_lineno_in (input_bfd, linp, &lin); |
| 4641 | lin.l_addr.l_symndx = *indexp; |
| 4642 | bfd_coff_swap_lineno_out (output_bfd, &lin, linp); |
| 4643 | |
| 4644 | /* Copy the other entries, adjusting their addresses. */ |
| 4645 | linpend = linp + *lineno_counts * linesz; |
| 4646 | offset = (o->output_section->vma |
| 4647 | + o->output_offset |
| 4648 | - o->vma); |
| 4649 | for (linp += linesz; linp < linpend; linp += linesz) |
| 4650 | { |
| 4651 | bfd_coff_swap_lineno_in (input_bfd, linp, &lin); |
| 4652 | lin.l_addr.l_paddr += offset; |
| 4653 | bfd_coff_swap_lineno_out (output_bfd, &lin, linp); |
| 4654 | } |
| 4655 | |
| 4656 | /* Write out the entries we've just processed. */ |
| 4657 | pos = (o->output_section->line_filepos |
| 4658 | + o->output_section->lineno_count * linesz); |
| 4659 | amt = linesz * *lineno_counts; |
| 4660 | if (bfd_seek (output_bfd, pos, SEEK_SET) != 0 |
| 4661 | || bfd_bwrite (flinfo->linenos + linoff, |
| 4662 | amt, output_bfd) != amt) |
| 4663 | return FALSE; |
| 4664 | o->output_section->lineno_count += *lineno_counts; |
| 4665 | |
| 4666 | /* Record the offset of the symbol's line numbers |
| 4667 | in the output file. */ |
| 4668 | aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = pos; |
| 4669 | |
| 4670 | if (incls > 0) |
| 4671 | { |
| 4672 | struct internal_syment *iisp, *iispend; |
| 4673 | long *iindp; |
| 4674 | bfd_byte *oos; |
| 4675 | bfd_vma range_start, range_end; |
| 4676 | int iiadd; |
| 4677 | |
| 4678 | /* Update any C_BINCL or C_EINCL symbols |
| 4679 | that refer to a line number in the |
| 4680 | range we just output. */ |
| 4681 | iisp = flinfo->internal_syms; |
| 4682 | iispend = iisp + obj_raw_syment_count (input_bfd); |
| 4683 | iindp = flinfo->sym_indices; |
| 4684 | oos = flinfo->outsyms; |
| 4685 | range_start = enclosing->line_filepos + linoff; |
| 4686 | range_end = range_start + *lineno_counts * linesz; |
| 4687 | while (iisp < iispend) |
| 4688 | { |
| 4689 | if (*iindp >= 0 |
| 4690 | && (iisp->n_sclass == C_BINCL |
| 4691 | || iisp->n_sclass == C_EINCL) |
| 4692 | && iisp->n_value >= range_start |
| 4693 | && iisp->n_value < range_end) |
| 4694 | { |
| 4695 | struct internal_syment iis; |
| 4696 | |
| 4697 | bfd_coff_swap_sym_in (output_bfd, oos, &iis); |
| 4698 | iis.n_value = (iisp->n_value |
| 4699 | - range_start |
| 4700 | + pos); |
| 4701 | bfd_coff_swap_sym_out (output_bfd, |
| 4702 | &iis, oos); |
| 4703 | --incls; |
| 4704 | } |
| 4705 | |
| 4706 | iiadd = 1 + iisp->n_numaux; |
| 4707 | if (*iindp >= 0) |
| 4708 | oos += iiadd * osymesz; |
| 4709 | iisp += iiadd; |
| 4710 | iindp += iiadd; |
| 4711 | } |
| 4712 | } |
| 4713 | } |
| 4714 | } |
| 4715 | |
| 4716 | bfd_coff_swap_aux_out (output_bfd, (void *) &aux, isymp->n_type, |
| 4717 | isymp->n_sclass, i, isymp->n_numaux, |
| 4718 | (void *) outsym); |
| 4719 | outsym += osymesz; |
| 4720 | esym += isymesz; |
| 4721 | } |
| 4722 | } |
| 4723 | |
| 4724 | sym_hash += add; |
| 4725 | indexp += add; |
| 4726 | isymp += add; |
| 4727 | csectpp += add; |
| 4728 | lineno_counts += add; |
| 4729 | debug_index += add; |
| 4730 | } |
| 4731 | |
| 4732 | /* If we swapped out a C_FILE symbol, guess that the next C_FILE |
| 4733 | symbol will be the first symbol in the next input file. In the |
| 4734 | normal case, this will save us from writing out the C_FILE symbol |
| 4735 | again. */ |
| 4736 | if (flinfo->last_file_index != -1 |
| 4737 | && (bfd_size_type) flinfo->last_file_index >= syment_base) |
| 4738 | { |
| 4739 | flinfo->last_file.n_value = output_index; |
| 4740 | bfd_coff_swap_sym_out (output_bfd, (void *) &flinfo->last_file, |
| 4741 | (void *) (flinfo->outsyms |
| 4742 | + ((flinfo->last_file_index - syment_base) |
| 4743 | * osymesz))); |
| 4744 | } |
| 4745 | |
| 4746 | /* Write the modified symbols to the output file. */ |
| 4747 | if (outsym > flinfo->outsyms) |
| 4748 | { |
| 4749 | file_ptr pos = obj_sym_filepos (output_bfd) + syment_base * osymesz; |
| 4750 | bfd_size_type amt = outsym - flinfo->outsyms; |
| 4751 | if (bfd_seek (output_bfd, pos, SEEK_SET) != 0 |
| 4752 | || bfd_bwrite (flinfo->outsyms, amt, output_bfd) != amt) |
| 4753 | return FALSE; |
| 4754 | |
| 4755 | BFD_ASSERT ((obj_raw_syment_count (output_bfd) |
| 4756 | + (outsym - flinfo->outsyms) / osymesz) |
| 4757 | == output_index); |
| 4758 | |
| 4759 | obj_raw_syment_count (output_bfd) = output_index; |
| 4760 | } |
| 4761 | |
| 4762 | /* Don't let the linker relocation routines discard the symbols. */ |
| 4763 | keep_syms = obj_coff_keep_syms (input_bfd); |
| 4764 | obj_coff_keep_syms (input_bfd) = TRUE; |
| 4765 | |
| 4766 | /* Relocate the contents of each section. */ |
| 4767 | for (o = input_bfd->sections; o != NULL; o = o->next) |
| 4768 | { |
| 4769 | bfd_byte *contents; |
| 4770 | |
| 4771 | if (! o->linker_mark) |
| 4772 | /* This section was omitted from the link. */ |
| 4773 | continue; |
| 4774 | |
| 4775 | if ((o->flags & SEC_HAS_CONTENTS) == 0 |
| 4776 | || o->size == 0 |
| 4777 | || (o->flags & SEC_IN_MEMORY) != 0) |
| 4778 | continue; |
| 4779 | |
| 4780 | /* We have set filepos correctly for the sections we created to |
| 4781 | represent csects, so bfd_get_section_contents should work. */ |
| 4782 | if (coff_section_data (input_bfd, o) != NULL |
| 4783 | && coff_section_data (input_bfd, o)->contents != NULL) |
| 4784 | contents = coff_section_data (input_bfd, o)->contents; |
| 4785 | else |
| 4786 | { |
| 4787 | bfd_size_type sz = o->rawsize ? o->rawsize : o->size; |
| 4788 | if (!bfd_get_section_contents (input_bfd, o, flinfo->contents, 0, sz)) |
| 4789 | goto err_out; |
| 4790 | contents = flinfo->contents; |
| 4791 | } |
| 4792 | |
| 4793 | if ((o->flags & SEC_RELOC) != 0) |
| 4794 | { |
| 4795 | int target_index; |
| 4796 | struct internal_reloc *internal_relocs; |
| 4797 | struct internal_reloc *irel; |
| 4798 | bfd_vma offset; |
| 4799 | struct internal_reloc *irelend; |
| 4800 | struct xcoff_link_hash_entry **rel_hash; |
| 4801 | long r_symndx; |
| 4802 | |
| 4803 | /* Read in the relocs. */ |
| 4804 | target_index = o->output_section->target_index; |
| 4805 | internal_relocs = (xcoff_read_internal_relocs |
| 4806 | (input_bfd, o, FALSE, flinfo->external_relocs, |
| 4807 | TRUE, |
| 4808 | (flinfo->section_info[target_index].relocs |
| 4809 | + o->output_section->reloc_count))); |
| 4810 | if (internal_relocs == NULL) |
| 4811 | goto err_out; |
| 4812 | |
| 4813 | /* Call processor specific code to relocate the section |
| 4814 | contents. */ |
| 4815 | if (! bfd_coff_relocate_section (output_bfd, flinfo->info, |
| 4816 | input_bfd, o, |
| 4817 | contents, |
| 4818 | internal_relocs, |
| 4819 | flinfo->internal_syms, |
| 4820 | xcoff_data (input_bfd)->csects)) |
| 4821 | goto err_out; |
| 4822 | |
| 4823 | offset = o->output_section->vma + o->output_offset - o->vma; |
| 4824 | irel = internal_relocs; |
| 4825 | irelend = irel + o->reloc_count; |
| 4826 | rel_hash = (flinfo->section_info[target_index].rel_hashes |
| 4827 | + o->output_section->reloc_count); |
| 4828 | for (; irel < irelend; irel++, rel_hash++) |
| 4829 | { |
| 4830 | struct xcoff_link_hash_entry *h = NULL; |
| 4831 | |
| 4832 | *rel_hash = NULL; |
| 4833 | |
| 4834 | /* Adjust the reloc address and symbol index. */ |
| 4835 | |
| 4836 | irel->r_vaddr += offset; |
| 4837 | |
| 4838 | r_symndx = irel->r_symndx; |
| 4839 | |
| 4840 | if (r_symndx == -1) |
| 4841 | h = NULL; |
| 4842 | else |
| 4843 | h = obj_xcoff_sym_hashes (input_bfd)[r_symndx]; |
| 4844 | |
| 4845 | if (r_symndx != -1 && flinfo->info->strip != strip_all) |
| 4846 | { |
| 4847 | if (h != NULL |
| 4848 | && h->smclas != XMC_TD |
| 4849 | && (irel->r_type == R_TOC |
| 4850 | || irel->r_type == R_GL |
| 4851 | || irel->r_type == R_TCL |
| 4852 | || irel->r_type == R_TRL |
| 4853 | || irel->r_type == R_TRLA)) |
| 4854 | { |
| 4855 | /* This is a TOC relative reloc with a symbol |
| 4856 | attached. The symbol should be the one which |
| 4857 | this reloc is for. We want to make this |
| 4858 | reloc against the TOC address of the symbol, |
| 4859 | not the symbol itself. */ |
| 4860 | BFD_ASSERT (h->toc_section != NULL); |
| 4861 | BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0); |
| 4862 | if (h->u.toc_indx != -1) |
| 4863 | irel->r_symndx = h->u.toc_indx; |
| 4864 | else |
| 4865 | { |
| 4866 | struct xcoff_toc_rel_hash *n; |
| 4867 | struct xcoff_link_section_info *si; |
| 4868 | size_t amt; |
| 4869 | |
| 4870 | amt = sizeof (* n); |
| 4871 | n = bfd_alloc (flinfo->output_bfd, amt); |
| 4872 | if (n == NULL) |
| 4873 | goto err_out; |
| 4874 | si = flinfo->section_info + target_index; |
| 4875 | n->next = si->toc_rel_hashes; |
| 4876 | n->h = h; |
| 4877 | n->rel = irel; |
| 4878 | si->toc_rel_hashes = n; |
| 4879 | } |
| 4880 | } |
| 4881 | else if (h != NULL) |
| 4882 | { |
| 4883 | /* This is a global symbol. */ |
| 4884 | if (h->indx >= 0) |
| 4885 | irel->r_symndx = h->indx; |
| 4886 | else |
| 4887 | { |
| 4888 | /* This symbol is being written at the end |
| 4889 | of the file, and we do not yet know the |
| 4890 | symbol index. We save the pointer to the |
| 4891 | hash table entry in the rel_hash list. |
| 4892 | We set the indx field to -2 to indicate |
| 4893 | that this symbol must not be stripped. */ |
| 4894 | *rel_hash = h; |
| 4895 | h->indx = -2; |
| 4896 | } |
| 4897 | } |
| 4898 | else |
| 4899 | { |
| 4900 | long indx; |
| 4901 | |
| 4902 | indx = flinfo->sym_indices[r_symndx]; |
| 4903 | |
| 4904 | if (indx == -1) |
| 4905 | { |
| 4906 | struct internal_syment *is; |
| 4907 | |
| 4908 | /* Relocations against a TC0 TOC anchor are |
| 4909 | automatically transformed to be against |
| 4910 | the TOC anchor in the output file. */ |
| 4911 | is = flinfo->internal_syms + r_symndx; |
| 4912 | if (is->n_sclass == C_HIDEXT |
| 4913 | && is->n_numaux > 0) |
| 4914 | { |
| 4915 | void * auxptr; |
| 4916 | union internal_auxent aux; |
| 4917 | |
| 4918 | auxptr = ((void *) |
| 4919 | (((bfd_byte *) |
| 4920 | obj_coff_external_syms (input_bfd)) |
| 4921 | + ((r_symndx + is->n_numaux) |
| 4922 | * isymesz))); |
| 4923 | bfd_coff_swap_aux_in (input_bfd, auxptr, |
| 4924 | is->n_type, is->n_sclass, |
| 4925 | is->n_numaux - 1, |
| 4926 | is->n_numaux, |
| 4927 | (void *) &aux); |
| 4928 | if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_SD |
| 4929 | && aux.x_csect.x_smclas == XMC_TC0) |
| 4930 | indx = flinfo->toc_symindx; |
| 4931 | } |
| 4932 | } |
| 4933 | |
| 4934 | if (indx != -1) |
| 4935 | irel->r_symndx = indx; |
| 4936 | else |
| 4937 | { |
| 4938 | |
| 4939 | struct internal_syment *is; |
| 4940 | |
| 4941 | const char *name; |
| 4942 | char buf[SYMNMLEN + 1]; |
| 4943 | |
| 4944 | /* This reloc is against a symbol we are |
| 4945 | stripping. It would be possible to handle |
| 4946 | this case, but I don't think it's worth it. */ |
| 4947 | is = flinfo->internal_syms + r_symndx; |
| 4948 | |
| 4949 | if (is->n_sclass != C_DWARF) |
| 4950 | { |
| 4951 | name = (_bfd_coff_internal_syment_name |
| 4952 | (input_bfd, is, buf)); |
| 4953 | |
| 4954 | if (name == NULL) |
| 4955 | goto err_out; |
| 4956 | |
| 4957 | (*flinfo->info->callbacks->unattached_reloc) |
| 4958 | (flinfo->info, name, |
| 4959 | input_bfd, o, irel->r_vaddr); |
| 4960 | } |
| 4961 | } |
| 4962 | } |
| 4963 | } |
| 4964 | |
| 4965 | if ((o->flags & SEC_DEBUGGING) == 0 |
| 4966 | && xcoff_need_ldrel_p (flinfo->info, irel, h)) |
| 4967 | { |
| 4968 | asection *sec; |
| 4969 | |
| 4970 | if (r_symndx == -1) |
| 4971 | sec = NULL; |
| 4972 | else if (h == NULL) |
| 4973 | sec = xcoff_data (input_bfd)->csects[r_symndx]; |
| 4974 | else |
| 4975 | sec = xcoff_symbol_section (h); |
| 4976 | if (!xcoff_create_ldrel (output_bfd, flinfo, |
| 4977 | o->output_section, input_bfd, |
| 4978 | irel, sec, h)) |
| 4979 | goto err_out; |
| 4980 | } |
| 4981 | } |
| 4982 | |
| 4983 | o->output_section->reloc_count += o->reloc_count; |
| 4984 | } |
| 4985 | |
| 4986 | /* Write out the modified section contents. */ |
| 4987 | if (! bfd_set_section_contents (output_bfd, o->output_section, |
| 4988 | contents, (file_ptr) o->output_offset, |
| 4989 | o->size)) |
| 4990 | goto err_out; |
| 4991 | } |
| 4992 | |
| 4993 | obj_coff_keep_syms (input_bfd) = keep_syms; |
| 4994 | |
| 4995 | if (! flinfo->info->keep_memory) |
| 4996 | { |
| 4997 | if (! _bfd_coff_free_symbols (input_bfd)) |
| 4998 | return FALSE; |
| 4999 | } |
| 5000 | |
| 5001 | return TRUE; |
| 5002 | |
| 5003 | err_out: |
| 5004 | obj_coff_keep_syms (input_bfd) = keep_syms; |
| 5005 | return FALSE; |
| 5006 | } |
| 5007 | |
| 5008 | #undef N_TMASK |
| 5009 | #undef N_BTSHFT |
| 5010 | |
| 5011 | /* Sort relocs by VMA. This is called via qsort. */ |
| 5012 | |
| 5013 | static int |
| 5014 | xcoff_sort_relocs (const void * p1, const void * p2) |
| 5015 | { |
| 5016 | const struct internal_reloc *r1 = (const struct internal_reloc *) p1; |
| 5017 | const struct internal_reloc *r2 = (const struct internal_reloc *) p2; |
| 5018 | |
| 5019 | if (r1->r_vaddr > r2->r_vaddr) |
| 5020 | return 1; |
| 5021 | else if (r1->r_vaddr < r2->r_vaddr) |
| 5022 | return -1; |
| 5023 | else |
| 5024 | return 0; |
| 5025 | } |
| 5026 | |
| 5027 | /* Return true if section SEC is a TOC section. */ |
| 5028 | |
| 5029 | static inline bfd_boolean |
| 5030 | xcoff_toc_section_p (asection *sec) |
| 5031 | { |
| 5032 | const char *name; |
| 5033 | |
| 5034 | name = sec->name; |
| 5035 | if (name[0] == '.' && name[1] == 't') |
| 5036 | { |
| 5037 | if (name[2] == 'c') |
| 5038 | { |
| 5039 | if (name[3] == '0' && name[4] == 0) |
| 5040 | return TRUE; |
| 5041 | if (name[3] == 0) |
| 5042 | return TRUE; |
| 5043 | } |
| 5044 | if (name[2] == 'd' && name[3] == 0) |
| 5045 | return TRUE; |
| 5046 | } |
| 5047 | return FALSE; |
| 5048 | } |
| 5049 | |
| 5050 | /* See if the link requires a TOC (it usually does!). If so, find a |
| 5051 | good place to put the TOC anchor csect, and write out the associated |
| 5052 | symbol. */ |
| 5053 | |
| 5054 | static bfd_boolean |
| 5055 | xcoff_find_tc0 (bfd *output_bfd, struct xcoff_final_link_info *flinfo) |
| 5056 | { |
| 5057 | bfd_vma toc_start, toc_end, start, end, best_address; |
| 5058 | asection *sec; |
| 5059 | bfd *input_bfd; |
| 5060 | int section_index; |
| 5061 | struct internal_syment irsym; |
| 5062 | union internal_auxent iraux; |
| 5063 | file_ptr pos; |
| 5064 | size_t size; |
| 5065 | |
| 5066 | /* Set [TOC_START, TOC_END) to the range of the TOC. Record the |
| 5067 | index of a csect at the beginning of the TOC. */ |
| 5068 | toc_start = ~(bfd_vma) 0; |
| 5069 | toc_end = 0; |
| 5070 | section_index = -1; |
| 5071 | for (input_bfd = flinfo->info->input_bfds; |
| 5072 | input_bfd != NULL; |
| 5073 | input_bfd = input_bfd->link.next) |
| 5074 | for (sec = input_bfd->sections; sec != NULL; sec = sec->next) |
| 5075 | if ((sec->flags & SEC_MARK) != 0 && xcoff_toc_section_p (sec)) |
| 5076 | { |
| 5077 | start = sec->output_section->vma + sec->output_offset; |
| 5078 | if (toc_start > start) |
| 5079 | { |
| 5080 | toc_start = start; |
| 5081 | section_index = sec->output_section->target_index; |
| 5082 | } |
| 5083 | |
| 5084 | end = start + sec->size; |
| 5085 | if (toc_end < end) |
| 5086 | toc_end = end; |
| 5087 | } |
| 5088 | |
| 5089 | /* There's no need for a TC0 symbol if we don't have a TOC. */ |
| 5090 | if (toc_end < toc_start) |
| 5091 | { |
| 5092 | xcoff_data (output_bfd)->toc = toc_start; |
| 5093 | return TRUE; |
| 5094 | } |
| 5095 | |
| 5096 | if (toc_end - toc_start < 0x8000) |
| 5097 | /* Every TOC csect can be accessed from TOC_START. */ |
| 5098 | best_address = toc_start; |
| 5099 | else |
| 5100 | { |
| 5101 | /* Find the lowest TOC csect that is still within range of TOC_END. */ |
| 5102 | best_address = toc_end; |
| 5103 | for (input_bfd = flinfo->info->input_bfds; |
| 5104 | input_bfd != NULL; |
| 5105 | input_bfd = input_bfd->link.next) |
| 5106 | for (sec = input_bfd->sections; sec != NULL; sec = sec->next) |
| 5107 | if ((sec->flags & SEC_MARK) != 0 && xcoff_toc_section_p (sec)) |
| 5108 | { |
| 5109 | start = sec->output_section->vma + sec->output_offset; |
| 5110 | if (start < best_address |
| 5111 | && start + 0x8000 >= toc_end) |
| 5112 | { |
| 5113 | best_address = start; |
| 5114 | section_index = sec->output_section->target_index; |
| 5115 | } |
| 5116 | } |
| 5117 | |
| 5118 | /* Make sure that the start of the TOC is also within range. */ |
| 5119 | if (best_address > toc_start + 0x8000) |
| 5120 | { |
| 5121 | _bfd_error_handler |
| 5122 | (_("TOC overflow: %#" PRIx64 " > 0x10000; try -mminimal-toc " |
| 5123 | "when compiling"), |
| 5124 | (uint64_t) (toc_end - toc_start)); |
| 5125 | bfd_set_error (bfd_error_file_too_big); |
| 5126 | return FALSE; |
| 5127 | } |
| 5128 | } |
| 5129 | |
| 5130 | /* Record the chosen TOC value. */ |
| 5131 | flinfo->toc_symindx = obj_raw_syment_count (output_bfd); |
| 5132 | xcoff_data (output_bfd)->toc = best_address; |
| 5133 | xcoff_data (output_bfd)->sntoc = section_index; |
| 5134 | |
| 5135 | /* Fill out the TC0 symbol. */ |
| 5136 | if (!bfd_xcoff_put_symbol_name (output_bfd, flinfo->info, flinfo->strtab, |
| 5137 | &irsym, "TOC")) |
| 5138 | return FALSE; |
| 5139 | irsym.n_value = best_address; |
| 5140 | irsym.n_scnum = section_index; |
| 5141 | irsym.n_sclass = C_HIDEXT; |
| 5142 | irsym.n_type = T_NULL; |
| 5143 | irsym.n_numaux = 1; |
| 5144 | bfd_coff_swap_sym_out (output_bfd, &irsym, flinfo->outsyms); |
| 5145 | |
| 5146 | /* Fill out the auxillary csect information. */ |
| 5147 | memset (&iraux, 0, sizeof iraux); |
| 5148 | iraux.x_csect.x_smtyp = XTY_SD; |
| 5149 | iraux.x_csect.x_smclas = XMC_TC0; |
| 5150 | iraux.x_csect.x_scnlen.l = 0; |
| 5151 | bfd_coff_swap_aux_out (output_bfd, &iraux, T_NULL, C_HIDEXT, 0, 1, |
| 5152 | flinfo->outsyms + bfd_coff_symesz (output_bfd)); |
| 5153 | |
| 5154 | /* Write the contents to the file. */ |
| 5155 | pos = obj_sym_filepos (output_bfd); |
| 5156 | pos += obj_raw_syment_count (output_bfd) * bfd_coff_symesz (output_bfd); |
| 5157 | size = 2 * bfd_coff_symesz (output_bfd); |
| 5158 | if (bfd_seek (output_bfd, pos, SEEK_SET) != 0 |
| 5159 | || bfd_bwrite (flinfo->outsyms, size, output_bfd) != size) |
| 5160 | return FALSE; |
| 5161 | obj_raw_syment_count (output_bfd) += 2; |
| 5162 | |
| 5163 | return TRUE; |
| 5164 | } |
| 5165 | |
| 5166 | /* Write out a non-XCOFF global symbol. */ |
| 5167 | |
| 5168 | static bfd_boolean |
| 5169 | xcoff_write_global_symbol (struct bfd_hash_entry *bh, void * inf) |
| 5170 | { |
| 5171 | struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) bh; |
| 5172 | struct xcoff_final_link_info *flinfo = (struct xcoff_final_link_info *) inf; |
| 5173 | bfd *output_bfd; |
| 5174 | bfd_byte *outsym; |
| 5175 | struct internal_syment isym; |
| 5176 | union internal_auxent aux; |
| 5177 | bfd_boolean result; |
| 5178 | file_ptr pos; |
| 5179 | bfd_size_type amt; |
| 5180 | |
| 5181 | output_bfd = flinfo->output_bfd; |
| 5182 | outsym = flinfo->outsyms; |
| 5183 | |
| 5184 | if (h->root.type == bfd_link_hash_warning) |
| 5185 | { |
| 5186 | h = (struct xcoff_link_hash_entry *) h->root.u.i.link; |
| 5187 | if (h->root.type == bfd_link_hash_new) |
| 5188 | return TRUE; |
| 5189 | } |
| 5190 | |
| 5191 | /* If this symbol was garbage collected, just skip it. */ |
| 5192 | if (xcoff_hash_table (flinfo->info)->gc |
| 5193 | && (h->flags & XCOFF_MARK) == 0) |
| 5194 | return TRUE; |
| 5195 | |
| 5196 | /* If we need a .loader section entry, write it out. */ |
| 5197 | if (h->ldsym != NULL) |
| 5198 | { |
| 5199 | struct internal_ldsym *ldsym; |
| 5200 | bfd *impbfd; |
| 5201 | |
| 5202 | ldsym = h->ldsym; |
| 5203 | |
| 5204 | if (h->root.type == bfd_link_hash_undefined |
| 5205 | || h->root.type == bfd_link_hash_undefweak) |
| 5206 | { |
| 5207 | |
| 5208 | ldsym->l_value = 0; |
| 5209 | ldsym->l_scnum = N_UNDEF; |
| 5210 | ldsym->l_smtype = XTY_ER; |
| 5211 | impbfd = h->root.u.undef.abfd; |
| 5212 | |
| 5213 | } |
| 5214 | else if (h->root.type == bfd_link_hash_defined |
| 5215 | || h->root.type == bfd_link_hash_defweak) |
| 5216 | { |
| 5217 | asection *sec; |
| 5218 | |
| 5219 | sec = h->root.u.def.section; |
| 5220 | ldsym->l_value = (sec->output_section->vma |
| 5221 | + sec->output_offset |
| 5222 | + h->root.u.def.value); |
| 5223 | ldsym->l_scnum = sec->output_section->target_index; |
| 5224 | ldsym->l_smtype = XTY_SD; |
| 5225 | impbfd = sec->owner; |
| 5226 | |
| 5227 | } |
| 5228 | else |
| 5229 | abort (); |
| 5230 | |
| 5231 | if (((h->flags & XCOFF_DEF_REGULAR) == 0 |
| 5232 | && (h->flags & XCOFF_DEF_DYNAMIC) != 0) |
| 5233 | || (h->flags & XCOFF_IMPORT) != 0) |
| 5234 | /* Clear l_smtype |
| 5235 | Import symbols are defined so the check above will make |
| 5236 | the l_smtype XTY_SD. But this is not correct, it should |
| 5237 | be cleared. */ |
| 5238 | ldsym->l_smtype |= L_IMPORT; |
| 5239 | |
| 5240 | if (((h->flags & XCOFF_DEF_REGULAR) != 0 |
| 5241 | && (h->flags & XCOFF_DEF_DYNAMIC) != 0) |
| 5242 | || (h->flags & XCOFF_EXPORT) != 0) |
| 5243 | ldsym->l_smtype |= L_EXPORT; |
| 5244 | |
| 5245 | if ((h->flags & XCOFF_ENTRY) != 0) |
| 5246 | ldsym->l_smtype |= L_ENTRY; |
| 5247 | |
| 5248 | if ((h->flags & XCOFF_RTINIT) != 0) |
| 5249 | ldsym->l_smtype = XTY_SD; |
| 5250 | |
| 5251 | ldsym->l_smclas = h->smclas; |
| 5252 | |
| 5253 | if (ldsym->l_smtype & L_IMPORT) |
| 5254 | { |
| 5255 | if ((h->root.type == bfd_link_hash_defined |
| 5256 | || h->root.type == bfd_link_hash_defweak) |
| 5257 | && (h->root.u.def.value != 0)) |
| 5258 | ldsym->l_smclas = XMC_XO; |
| 5259 | |
| 5260 | else if ((h->flags & (XCOFF_SYSCALL32 | XCOFF_SYSCALL64)) == |
| 5261 | (XCOFF_SYSCALL32 | XCOFF_SYSCALL64)) |
| 5262 | ldsym->l_smclas = XMC_SV3264; |
| 5263 | |
| 5264 | else if (h->flags & XCOFF_SYSCALL32) |
| 5265 | ldsym->l_smclas = XMC_SV; |
| 5266 | |
| 5267 | else if (h->flags & XCOFF_SYSCALL64) |
| 5268 | ldsym->l_smclas = XMC_SV64; |
| 5269 | } |
| 5270 | |
| 5271 | if (ldsym->l_ifile == -(bfd_size_type) 1) |
| 5272 | { |
| 5273 | ldsym->l_ifile = 0; |
| 5274 | } |
| 5275 | else if (ldsym->l_ifile == 0) |
| 5276 | { |
| 5277 | if ((ldsym->l_smtype & L_IMPORT) == 0) |
| 5278 | ldsym->l_ifile = 0; |
| 5279 | else if (impbfd == NULL) |
| 5280 | ldsym->l_ifile = 0; |
| 5281 | else |
| 5282 | { |
| 5283 | BFD_ASSERT (impbfd->xvec == output_bfd->xvec); |
| 5284 | ldsym->l_ifile = xcoff_data (impbfd)->import_file_id; |
| 5285 | } |
| 5286 | } |
| 5287 | |
| 5288 | ldsym->l_parm = 0; |
| 5289 | |
| 5290 | BFD_ASSERT (h->ldindx >= 0); |
| 5291 | |
| 5292 | bfd_xcoff_swap_ldsym_out (output_bfd, ldsym, |
| 5293 | (flinfo->ldsym + |
| 5294 | (h->ldindx - 3) |
| 5295 | * bfd_xcoff_ldsymsz(flinfo->output_bfd))); |
| 5296 | h->ldsym = NULL; |
| 5297 | } |
| 5298 | |
| 5299 | /* If this symbol needs global linkage code, write it out. */ |
| 5300 | if (h->root.type == bfd_link_hash_defined |
| 5301 | && (h->root.u.def.section |
| 5302 | == xcoff_hash_table (flinfo->info)->linkage_section)) |
| 5303 | { |
| 5304 | bfd_byte *p; |
| 5305 | bfd_vma tocoff; |
| 5306 | unsigned int i; |
| 5307 | |
| 5308 | p = h->root.u.def.section->contents + h->root.u.def.value; |
| 5309 | |
| 5310 | /* The first instruction in the global linkage code loads a |
| 5311 | specific TOC element. */ |
| 5312 | tocoff = (h->descriptor->toc_section->output_section->vma |
| 5313 | + h->descriptor->toc_section->output_offset |
| 5314 | - xcoff_data (output_bfd)->toc); |
| 5315 | |
| 5316 | if ((h->descriptor->flags & XCOFF_SET_TOC) != 0) |
| 5317 | tocoff += h->descriptor->u.toc_offset; |
| 5318 | |
| 5319 | /* The first instruction in the glink code needs to be |
| 5320 | cooked to hold the correct offset in the toc. The |
| 5321 | rest are just output raw. */ |
| 5322 | bfd_put_32 (output_bfd, |
| 5323 | bfd_xcoff_glink_code(output_bfd, 0) | (tocoff & 0xffff), p); |
| 5324 | |
| 5325 | /* Start with i == 1 to get past the first instruction done above |
| 5326 | The /4 is because the glink code is in bytes and we are going |
| 5327 | 4 at a pop. */ |
| 5328 | for (i = 1; i < bfd_xcoff_glink_code_size(output_bfd) / 4; i++) |
| 5329 | bfd_put_32 (output_bfd, |
| 5330 | (bfd_vma) bfd_xcoff_glink_code(output_bfd, i), |
| 5331 | &p[4 * i]); |
| 5332 | } |
| 5333 | |
| 5334 | /* If we created a TOC entry for this symbol, write out the required |
| 5335 | relocs. */ |
| 5336 | if ((h->flags & XCOFF_SET_TOC) != 0) |
| 5337 | { |
| 5338 | asection *tocsec; |
| 5339 | asection *osec; |
| 5340 | int oindx; |
| 5341 | struct internal_reloc *irel; |
| 5342 | struct internal_syment irsym; |
| 5343 | union internal_auxent iraux; |
| 5344 | |
| 5345 | tocsec = h->toc_section; |
| 5346 | osec = tocsec->output_section; |
| 5347 | oindx = osec->target_index; |
| 5348 | irel = flinfo->section_info[oindx].relocs + osec->reloc_count; |
| 5349 | irel->r_vaddr = (osec->vma |
| 5350 | + tocsec->output_offset |
| 5351 | + h->u.toc_offset); |
| 5352 | |
| 5353 | if (h->indx >= 0) |
| 5354 | irel->r_symndx = h->indx; |
| 5355 | else |
| 5356 | { |
| 5357 | h->indx = -2; |
| 5358 | irel->r_symndx = obj_raw_syment_count (output_bfd); |
| 5359 | } |
| 5360 | |
| 5361 | BFD_ASSERT (h->ldindx >= 0); |
| 5362 | |
| 5363 | /* Initialize the aux union here instead of closer to when it is |
| 5364 | written out below because the length of the csect depends on |
| 5365 | whether the output is 32 or 64 bit. */ |
| 5366 | memset (&iraux, 0, sizeof iraux); |
| 5367 | iraux.x_csect.x_smtyp = XTY_SD; |
| 5368 | /* iraux.x_csect.x_scnlen.l = 4 or 8, see below. */ |
| 5369 | iraux.x_csect.x_smclas = XMC_TC; |
| 5370 | |
| 5371 | /* 32 bit uses a 32 bit R_POS to do the relocations |
| 5372 | 64 bit uses a 64 bit R_POS to do the relocations |
| 5373 | |
| 5374 | Also needs to change the csect size : 4 for 32 bit, 8 for 64 bit |
| 5375 | |
| 5376 | Which one is determined by the backend. */ |
| 5377 | if (bfd_xcoff_is_xcoff64 (output_bfd)) |
| 5378 | { |
| 5379 | irel->r_size = 63; |
| 5380 | iraux.x_csect.x_scnlen.l = 8; |
| 5381 | } |
| 5382 | else if (bfd_xcoff_is_xcoff32 (output_bfd)) |
| 5383 | { |
| 5384 | irel->r_size = 31; |
| 5385 | iraux.x_csect.x_scnlen.l = 4; |
| 5386 | } |
| 5387 | else |
| 5388 | return FALSE; |
| 5389 | |
| 5390 | irel->r_type = R_POS; |
| 5391 | flinfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL; |
| 5392 | ++osec->reloc_count; |
| 5393 | |
| 5394 | if (!xcoff_create_ldrel (output_bfd, flinfo, osec, |
| 5395 | output_bfd, irel, NULL, h)) |
| 5396 | return FALSE; |
| 5397 | |
| 5398 | /* We need to emit a symbol to define a csect which holds |
| 5399 | the reloc. */ |
| 5400 | if (flinfo->info->strip != strip_all) |
| 5401 | { |
| 5402 | result = bfd_xcoff_put_symbol_name (output_bfd, flinfo->info, |
| 5403 | flinfo->strtab, |
| 5404 | &irsym, h->root.root.string); |
| 5405 | if (!result) |
| 5406 | return FALSE; |
| 5407 | |
| 5408 | irsym.n_value = irel->r_vaddr; |
| 5409 | irsym.n_scnum = osec->target_index; |
| 5410 | irsym.n_sclass = C_HIDEXT; |
| 5411 | irsym.n_type = T_NULL; |
| 5412 | irsym.n_numaux = 1; |
| 5413 | |
| 5414 | bfd_coff_swap_sym_out (output_bfd, (void *) &irsym, (void *) outsym); |
| 5415 | outsym += bfd_coff_symesz (output_bfd); |
| 5416 | |
| 5417 | /* Note : iraux is initialized above. */ |
| 5418 | bfd_coff_swap_aux_out (output_bfd, (void *) &iraux, T_NULL, C_HIDEXT, |
| 5419 | 0, 1, (void *) outsym); |
| 5420 | outsym += bfd_coff_auxesz (output_bfd); |
| 5421 | |
| 5422 | if (h->indx >= 0) |
| 5423 | { |
| 5424 | /* We aren't going to write out the symbols below, so we |
| 5425 | need to write them out now. */ |
| 5426 | pos = obj_sym_filepos (output_bfd); |
| 5427 | pos += (obj_raw_syment_count (output_bfd) |
| 5428 | * bfd_coff_symesz (output_bfd)); |
| 5429 | amt = outsym - flinfo->outsyms; |
| 5430 | if (bfd_seek (output_bfd, pos, SEEK_SET) != 0 |
| 5431 | || bfd_bwrite (flinfo->outsyms, amt, output_bfd) != amt) |
| 5432 | return FALSE; |
| 5433 | obj_raw_syment_count (output_bfd) += |
| 5434 | (outsym - flinfo->outsyms) / bfd_coff_symesz (output_bfd); |
| 5435 | |
| 5436 | outsym = flinfo->outsyms; |
| 5437 | } |
| 5438 | } |
| 5439 | } |
| 5440 | |
| 5441 | /* If this symbol is a specially defined function descriptor, write |
| 5442 | it out. The first word is the address of the function code |
| 5443 | itself, the second word is the address of the TOC, and the third |
| 5444 | word is zero. |
| 5445 | |
| 5446 | 32 bit vs 64 bit |
| 5447 | The addresses for the 32 bit will take 4 bytes and the addresses |
| 5448 | for 64 bit will take 8 bytes. Similar for the relocs. This type |
| 5449 | of logic was also done above to create a TOC entry in |
| 5450 | xcoff_write_global_symbol. */ |
| 5451 | if ((h->flags & XCOFF_DESCRIPTOR) != 0 |
| 5452 | && h->root.type == bfd_link_hash_defined |
| 5453 | && (h->root.u.def.section |
| 5454 | == xcoff_hash_table (flinfo->info)->descriptor_section)) |
| 5455 | { |
| 5456 | asection *sec; |
| 5457 | asection *osec; |
| 5458 | int oindx; |
| 5459 | bfd_byte *p; |
| 5460 | struct xcoff_link_hash_entry *hentry; |
| 5461 | asection *esec; |
| 5462 | struct internal_reloc *irel; |
| 5463 | asection *tsec; |
| 5464 | unsigned int reloc_size, byte_size; |
| 5465 | |
| 5466 | if (bfd_xcoff_is_xcoff64 (output_bfd)) |
| 5467 | { |
| 5468 | reloc_size = 63; |
| 5469 | byte_size = 8; |
| 5470 | } |
| 5471 | else if (bfd_xcoff_is_xcoff32 (output_bfd)) |
| 5472 | { |
| 5473 | reloc_size = 31; |
| 5474 | byte_size = 4; |
| 5475 | } |
| 5476 | else |
| 5477 | return FALSE; |
| 5478 | |
| 5479 | sec = h->root.u.def.section; |
| 5480 | osec = sec->output_section; |
| 5481 | oindx = osec->target_index; |
| 5482 | p = sec->contents + h->root.u.def.value; |
| 5483 | |
| 5484 | hentry = h->descriptor; |
| 5485 | BFD_ASSERT (hentry != NULL |
| 5486 | && (hentry->root.type == bfd_link_hash_defined |
| 5487 | || hentry->root.type == bfd_link_hash_defweak)); |
| 5488 | esec = hentry->root.u.def.section; |
| 5489 | |
| 5490 | irel = flinfo->section_info[oindx].relocs + osec->reloc_count; |
| 5491 | irel->r_vaddr = (osec->vma |
| 5492 | + sec->output_offset |
| 5493 | + h->root.u.def.value); |
| 5494 | irel->r_symndx = esec->output_section->target_index; |
| 5495 | irel->r_type = R_POS; |
| 5496 | irel->r_size = reloc_size; |
| 5497 | flinfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL; |
| 5498 | ++osec->reloc_count; |
| 5499 | |
| 5500 | if (!xcoff_create_ldrel (output_bfd, flinfo, osec, |
| 5501 | output_bfd, irel, esec, NULL)) |
| 5502 | return FALSE; |
| 5503 | |
| 5504 | /* There are three items to write out, |
| 5505 | the address of the code |
| 5506 | the address of the toc anchor |
| 5507 | the environment pointer. |
| 5508 | We are ignoring the environment pointer. So set it to zero. */ |
| 5509 | if (bfd_xcoff_is_xcoff64 (output_bfd)) |
| 5510 | { |
| 5511 | bfd_put_64 (output_bfd, |
| 5512 | (esec->output_section->vma + esec->output_offset |
| 5513 | + hentry->root.u.def.value), |
| 5514 | p); |
| 5515 | bfd_put_64 (output_bfd, xcoff_data (output_bfd)->toc, p + 8); |
| 5516 | bfd_put_64 (output_bfd, (bfd_vma) 0, p + 16); |
| 5517 | } |
| 5518 | else |
| 5519 | { |
| 5520 | /* 32 bit backend |
| 5521 | This logic was already called above so the error case where |
| 5522 | the backend is neither has already been checked. */ |
| 5523 | bfd_put_32 (output_bfd, |
| 5524 | (esec->output_section->vma + esec->output_offset |
| 5525 | + hentry->root.u.def.value), |
| 5526 | p); |
| 5527 | bfd_put_32 (output_bfd, xcoff_data (output_bfd)->toc, p + 4); |
| 5528 | bfd_put_32 (output_bfd, (bfd_vma) 0, p + 8); |
| 5529 | } |
| 5530 | |
| 5531 | tsec = coff_section_from_bfd_index (output_bfd, |
| 5532 | xcoff_data (output_bfd)->sntoc); |
| 5533 | |
| 5534 | ++irel; |
| 5535 | irel->r_vaddr = (osec->vma |
| 5536 | + sec->output_offset |
| 5537 | + h->root.u.def.value |
| 5538 | + byte_size); |
| 5539 | irel->r_symndx = tsec->output_section->target_index; |
| 5540 | irel->r_type = R_POS; |
| 5541 | irel->r_size = reloc_size; |
| 5542 | flinfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL; |
| 5543 | ++osec->reloc_count; |
| 5544 | |
| 5545 | if (!xcoff_create_ldrel (output_bfd, flinfo, osec, |
| 5546 | output_bfd, irel, tsec, NULL)) |
| 5547 | return FALSE; |
| 5548 | } |
| 5549 | |
| 5550 | if (h->indx >= 0 || flinfo->info->strip == strip_all) |
| 5551 | { |
| 5552 | BFD_ASSERT (outsym == flinfo->outsyms); |
| 5553 | return TRUE; |
| 5554 | } |
| 5555 | |
| 5556 | if (h->indx != -2 |
| 5557 | && (flinfo->info->strip == strip_all |
| 5558 | || (flinfo->info->strip == strip_some |
| 5559 | && bfd_hash_lookup (flinfo->info->keep_hash, h->root.root.string, |
| 5560 | FALSE, FALSE) == NULL))) |
| 5561 | { |
| 5562 | BFD_ASSERT (outsym == flinfo->outsyms); |
| 5563 | return TRUE; |
| 5564 | } |
| 5565 | |
| 5566 | if (h->indx != -2 |
| 5567 | && (h->flags & (XCOFF_REF_REGULAR | XCOFF_DEF_REGULAR)) == 0) |
| 5568 | { |
| 5569 | BFD_ASSERT (outsym == flinfo->outsyms); |
| 5570 | return TRUE; |
| 5571 | } |
| 5572 | |
| 5573 | memset (&aux, 0, sizeof aux); |
| 5574 | |
| 5575 | h->indx = obj_raw_syment_count (output_bfd); |
| 5576 | |
| 5577 | result = bfd_xcoff_put_symbol_name (output_bfd, flinfo->info, flinfo->strtab, |
| 5578 | &isym, h->root.root.string); |
| 5579 | if (!result) |
| 5580 | return FALSE; |
| 5581 | |
| 5582 | if (h->root.type == bfd_link_hash_undefined |
| 5583 | || h->root.type == bfd_link_hash_undefweak) |
| 5584 | { |
| 5585 | isym.n_value = 0; |
| 5586 | isym.n_scnum = N_UNDEF; |
| 5587 | if (h->root.type == bfd_link_hash_undefweak |
| 5588 | && C_WEAKEXT == C_AIX_WEAKEXT) |
| 5589 | isym.n_sclass = C_WEAKEXT; |
| 5590 | else |
| 5591 | isym.n_sclass = C_EXT; |
| 5592 | aux.x_csect.x_smtyp = XTY_ER; |
| 5593 | } |
| 5594 | else if ((h->root.type == bfd_link_hash_defined |
| 5595 | || h->root.type == bfd_link_hash_defweak) |
| 5596 | && h->smclas == XMC_XO) |
| 5597 | { |
| 5598 | BFD_ASSERT (bfd_is_abs_symbol (&h->root)); |
| 5599 | isym.n_value = h->root.u.def.value; |
| 5600 | isym.n_scnum = N_UNDEF; |
| 5601 | if (h->root.type == bfd_link_hash_defweak |
| 5602 | && C_WEAKEXT == C_AIX_WEAKEXT) |
| 5603 | isym.n_sclass = C_WEAKEXT; |
| 5604 | else |
| 5605 | isym.n_sclass = C_EXT; |
| 5606 | aux.x_csect.x_smtyp = XTY_ER; |
| 5607 | } |
| 5608 | else if (h->root.type == bfd_link_hash_defined |
| 5609 | || h->root.type == bfd_link_hash_defweak) |
| 5610 | { |
| 5611 | struct xcoff_link_size_list *l; |
| 5612 | |
| 5613 | isym.n_value = (h->root.u.def.section->output_section->vma |
| 5614 | + h->root.u.def.section->output_offset |
| 5615 | + h->root.u.def.value); |
| 5616 | if (bfd_is_abs_section (h->root.u.def.section->output_section)) |
| 5617 | isym.n_scnum = N_ABS; |
| 5618 | else |
| 5619 | isym.n_scnum = h->root.u.def.section->output_section->target_index; |
| 5620 | isym.n_sclass = C_HIDEXT; |
| 5621 | aux.x_csect.x_smtyp = XTY_SD; |
| 5622 | |
| 5623 | if ((h->flags & XCOFF_HAS_SIZE) != 0) |
| 5624 | { |
| 5625 | for (l = xcoff_hash_table (flinfo->info)->size_list; |
| 5626 | l != NULL; |
| 5627 | l = l->next) |
| 5628 | { |
| 5629 | if (l->h == h) |
| 5630 | { |
| 5631 | aux.x_csect.x_scnlen.l = l->size; |
| 5632 | break; |
| 5633 | } |
| 5634 | } |
| 5635 | } |
| 5636 | } |
| 5637 | else if (h->root.type == bfd_link_hash_common) |
| 5638 | { |
| 5639 | isym.n_value = (h->root.u.c.p->section->output_section->vma |
| 5640 | + h->root.u.c.p->section->output_offset); |
| 5641 | isym.n_scnum = h->root.u.c.p->section->output_section->target_index; |
| 5642 | isym.n_sclass = C_EXT; |
| 5643 | aux.x_csect.x_smtyp = XTY_CM; |
| 5644 | aux.x_csect.x_scnlen.l = h->root.u.c.size; |
| 5645 | } |
| 5646 | else |
| 5647 | abort (); |
| 5648 | |
| 5649 | isym.n_type = T_NULL; |
| 5650 | isym.n_numaux = 1; |
| 5651 | |
| 5652 | bfd_coff_swap_sym_out (output_bfd, (void *) &isym, (void *) outsym); |
| 5653 | outsym += bfd_coff_symesz (output_bfd); |
| 5654 | |
| 5655 | aux.x_csect.x_smclas = h->smclas; |
| 5656 | bfd_coff_swap_aux_out (output_bfd, (void *) &aux, T_NULL, isym.n_sclass, 0, 1, |
| 5657 | (void *) outsym); |
| 5658 | outsym += bfd_coff_auxesz (output_bfd); |
| 5659 | |
| 5660 | if ((h->root.type == bfd_link_hash_defined |
| 5661 | || h->root.type == bfd_link_hash_defweak) |
| 5662 | && h->smclas != XMC_XO) |
| 5663 | { |
| 5664 | /* We just output an SD symbol. Now output an LD symbol. */ |
| 5665 | h->indx += 2; |
| 5666 | |
| 5667 | if (h->root.type == bfd_link_hash_defweak |
| 5668 | && C_WEAKEXT == C_AIX_WEAKEXT) |
| 5669 | isym.n_sclass = C_WEAKEXT; |
| 5670 | else |
| 5671 | isym.n_sclass = C_EXT; |
| 5672 | bfd_coff_swap_sym_out (output_bfd, (void *) &isym, (void *) outsym); |
| 5673 | outsym += bfd_coff_symesz (output_bfd); |
| 5674 | |
| 5675 | aux.x_csect.x_smtyp = XTY_LD; |
| 5676 | aux.x_csect.x_scnlen.l = obj_raw_syment_count (output_bfd); |
| 5677 | bfd_coff_swap_aux_out (output_bfd, (void *) &aux, T_NULL, C_EXT, 0, 1, |
| 5678 | (void *) outsym); |
| 5679 | outsym += bfd_coff_auxesz (output_bfd); |
| 5680 | } |
| 5681 | |
| 5682 | pos = obj_sym_filepos (output_bfd); |
| 5683 | pos += obj_raw_syment_count (output_bfd) * bfd_coff_symesz (output_bfd); |
| 5684 | amt = outsym - flinfo->outsyms; |
| 5685 | if (bfd_seek (output_bfd, pos, SEEK_SET) != 0 |
| 5686 | || bfd_bwrite (flinfo->outsyms, amt, output_bfd) != amt) |
| 5687 | return FALSE; |
| 5688 | obj_raw_syment_count (output_bfd) += |
| 5689 | (outsym - flinfo->outsyms) / bfd_coff_symesz (output_bfd); |
| 5690 | |
| 5691 | return TRUE; |
| 5692 | } |
| 5693 | |
| 5694 | /* Handle a link order which is supposed to generate a reloc. */ |
| 5695 | |
| 5696 | static bfd_boolean |
| 5697 | xcoff_reloc_link_order (bfd *output_bfd, |
| 5698 | struct xcoff_final_link_info *flinfo, |
| 5699 | asection *output_section, |
| 5700 | struct bfd_link_order *link_order) |
| 5701 | { |
| 5702 | reloc_howto_type *howto; |
| 5703 | struct xcoff_link_hash_entry *h; |
| 5704 | asection *hsec; |
| 5705 | bfd_vma hval; |
| 5706 | bfd_vma addend; |
| 5707 | struct internal_reloc *irel; |
| 5708 | struct xcoff_link_hash_entry **rel_hash_ptr; |
| 5709 | |
| 5710 | if (link_order->type == bfd_section_reloc_link_order) |
| 5711 | /* We need to somehow locate a symbol in the right section. The |
| 5712 | symbol must either have a value of zero, or we must adjust |
| 5713 | the addend by the value of the symbol. FIXME: Write this |
| 5714 | when we need it. The old linker couldn't handle this anyhow. */ |
| 5715 | abort (); |
| 5716 | |
| 5717 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); |
| 5718 | if (howto == NULL) |
| 5719 | { |
| 5720 | bfd_set_error (bfd_error_bad_value); |
| 5721 | return FALSE; |
| 5722 | } |
| 5723 | |
| 5724 | h = ((struct xcoff_link_hash_entry *) |
| 5725 | bfd_wrapped_link_hash_lookup (output_bfd, flinfo->info, |
| 5726 | link_order->u.reloc.p->u.name, |
| 5727 | FALSE, FALSE, TRUE)); |
| 5728 | if (h == NULL) |
| 5729 | { |
| 5730 | (*flinfo->info->callbacks->unattached_reloc) |
| 5731 | (flinfo->info, link_order->u.reloc.p->u.name, NULL, NULL, (bfd_vma) 0); |
| 5732 | return TRUE; |
| 5733 | } |
| 5734 | |
| 5735 | hsec = xcoff_symbol_section (h); |
| 5736 | if (h->root.type == bfd_link_hash_defined |
| 5737 | || h->root.type == bfd_link_hash_defweak) |
| 5738 | hval = h->root.u.def.value; |
| 5739 | else |
| 5740 | hval = 0; |
| 5741 | |
| 5742 | addend = link_order->u.reloc.p->addend; |
| 5743 | if (hsec != NULL) |
| 5744 | addend += (hsec->output_section->vma |
| 5745 | + hsec->output_offset |
| 5746 | + hval); |
| 5747 | |
| 5748 | if (addend != 0) |
| 5749 | { |
| 5750 | bfd_size_type size; |
| 5751 | bfd_byte *buf; |
| 5752 | bfd_reloc_status_type rstat; |
| 5753 | bfd_boolean ok; |
| 5754 | |
| 5755 | size = bfd_get_reloc_size (howto); |
| 5756 | buf = bfd_zmalloc (size); |
| 5757 | if (buf == NULL && size != 0) |
| 5758 | return FALSE; |
| 5759 | |
| 5760 | rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); |
| 5761 | switch (rstat) |
| 5762 | { |
| 5763 | case bfd_reloc_ok: |
| 5764 | break; |
| 5765 | default: |
| 5766 | case bfd_reloc_outofrange: |
| 5767 | abort (); |
| 5768 | case bfd_reloc_overflow: |
| 5769 | (*flinfo->info->callbacks->reloc_overflow) |
| 5770 | (flinfo->info, NULL, link_order->u.reloc.p->u.name, |
| 5771 | howto->name, addend, NULL, NULL, (bfd_vma) 0); |
| 5772 | break; |
| 5773 | } |
| 5774 | ok = bfd_set_section_contents (output_bfd, output_section, (void *) buf, |
| 5775 | (file_ptr) link_order->offset, size); |
| 5776 | free (buf); |
| 5777 | if (! ok) |
| 5778 | return FALSE; |
| 5779 | } |
| 5780 | |
| 5781 | /* Store the reloc information in the right place. It will get |
| 5782 | swapped and written out at the end of the final_link routine. */ |
| 5783 | irel = (flinfo->section_info[output_section->target_index].relocs |
| 5784 | + output_section->reloc_count); |
| 5785 | rel_hash_ptr = (flinfo->section_info[output_section->target_index].rel_hashes |
| 5786 | + output_section->reloc_count); |
| 5787 | |
| 5788 | memset (irel, 0, sizeof (struct internal_reloc)); |
| 5789 | *rel_hash_ptr = NULL; |
| 5790 | |
| 5791 | irel->r_vaddr = output_section->vma + link_order->offset; |
| 5792 | |
| 5793 | if (h->indx >= 0) |
| 5794 | irel->r_symndx = h->indx; |
| 5795 | else |
| 5796 | { |
| 5797 | /* Set the index to -2 to force this symbol to get written out. */ |
| 5798 | h->indx = -2; |
| 5799 | *rel_hash_ptr = h; |
| 5800 | irel->r_symndx = 0; |
| 5801 | } |
| 5802 | |
| 5803 | irel->r_type = howto->type; |
| 5804 | irel->r_size = howto->bitsize - 1; |
| 5805 | if (howto->complain_on_overflow == complain_overflow_signed) |
| 5806 | irel->r_size |= 0x80; |
| 5807 | |
| 5808 | ++output_section->reloc_count; |
| 5809 | |
| 5810 | /* Now output the reloc to the .loader section. */ |
| 5811 | if (xcoff_hash_table (flinfo->info)->loader_section) |
| 5812 | { |
| 5813 | if (!xcoff_create_ldrel (output_bfd, flinfo, output_section, |
| 5814 | output_bfd, irel, hsec, h)) |
| 5815 | return FALSE; |
| 5816 | } |
| 5817 | |
| 5818 | return TRUE; |
| 5819 | } |
| 5820 | |
| 5821 | /* Do the final link step. */ |
| 5822 | |
| 5823 | bfd_boolean |
| 5824 | _bfd_xcoff_bfd_final_link (bfd *abfd, struct bfd_link_info *info) |
| 5825 | { |
| 5826 | bfd_size_type symesz; |
| 5827 | struct xcoff_final_link_info flinfo; |
| 5828 | asection *o; |
| 5829 | struct bfd_link_order *p; |
| 5830 | bfd_size_type max_contents_size; |
| 5831 | bfd_size_type max_sym_count; |
| 5832 | bfd_size_type max_lineno_count; |
| 5833 | bfd_size_type max_reloc_count; |
| 5834 | bfd_size_type max_output_reloc_count; |
| 5835 | file_ptr rel_filepos; |
| 5836 | unsigned int relsz; |
| 5837 | file_ptr line_filepos; |
| 5838 | unsigned int linesz; |
| 5839 | bfd *sub; |
| 5840 | bfd_byte *external_relocs = NULL; |
| 5841 | char strbuf[STRING_SIZE_SIZE]; |
| 5842 | file_ptr pos; |
| 5843 | bfd_size_type amt; |
| 5844 | |
| 5845 | if (bfd_link_pic (info)) |
| 5846 | abfd->flags |= DYNAMIC; |
| 5847 | |
| 5848 | symesz = bfd_coff_symesz (abfd); |
| 5849 | |
| 5850 | flinfo.info = info; |
| 5851 | flinfo.output_bfd = abfd; |
| 5852 | flinfo.strtab = NULL; |
| 5853 | flinfo.section_info = NULL; |
| 5854 | flinfo.last_file_index = -1; |
| 5855 | flinfo.toc_symindx = -1; |
| 5856 | flinfo.internal_syms = NULL; |
| 5857 | flinfo.sym_indices = NULL; |
| 5858 | flinfo.outsyms = NULL; |
| 5859 | flinfo.linenos = NULL; |
| 5860 | flinfo.contents = NULL; |
| 5861 | flinfo.external_relocs = NULL; |
| 5862 | |
| 5863 | if (xcoff_hash_table (info)->loader_section) |
| 5864 | { |
| 5865 | flinfo.ldsym = (xcoff_hash_table (info)->loader_section->contents |
| 5866 | + bfd_xcoff_ldhdrsz (abfd)); |
| 5867 | flinfo.ldrel = (xcoff_hash_table (info)->loader_section->contents |
| 5868 | + bfd_xcoff_ldhdrsz (abfd) |
| 5869 | + (xcoff_hash_table (info)->ldhdr.l_nsyms |
| 5870 | * bfd_xcoff_ldsymsz (abfd))); |
| 5871 | } |
| 5872 | else |
| 5873 | { |
| 5874 | flinfo.ldsym = NULL; |
| 5875 | flinfo.ldrel = NULL; |
| 5876 | } |
| 5877 | |
| 5878 | xcoff_data (abfd)->coff.link_info = info; |
| 5879 | |
| 5880 | flinfo.strtab = _bfd_stringtab_init (); |
| 5881 | if (flinfo.strtab == NULL) |
| 5882 | goto error_return; |
| 5883 | |
| 5884 | /* Count the relocation entries required for the output file. |
| 5885 | (We've already counted the line numbers.) Determine a few |
| 5886 | maximum sizes. */ |
| 5887 | max_contents_size = 0; |
| 5888 | max_lineno_count = 0; |
| 5889 | max_reloc_count = 0; |
| 5890 | for (o = abfd->sections; o != NULL; o = o->next) |
| 5891 | { |
| 5892 | o->reloc_count = 0; |
| 5893 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
| 5894 | { |
| 5895 | if (p->type == bfd_indirect_link_order) |
| 5896 | { |
| 5897 | asection *sec; |
| 5898 | |
| 5899 | sec = p->u.indirect.section; |
| 5900 | |
| 5901 | /* Mark all sections which are to be included in the |
| 5902 | link. This will normally be every section. We need |
| 5903 | to do this so that we can identify any sections which |
| 5904 | the linker has decided to not include. */ |
| 5905 | sec->linker_mark = TRUE; |
| 5906 | |
| 5907 | o->reloc_count += sec->reloc_count; |
| 5908 | |
| 5909 | if ((sec->flags & SEC_IN_MEMORY) == 0) |
| 5910 | { |
| 5911 | if (sec->rawsize > max_contents_size) |
| 5912 | max_contents_size = sec->rawsize; |
| 5913 | if (sec->size > max_contents_size) |
| 5914 | max_contents_size = sec->size; |
| 5915 | } |
| 5916 | if (coff_section_data (sec->owner, sec) != NULL |
| 5917 | && xcoff_section_data (sec->owner, sec) != NULL |
| 5918 | && (xcoff_section_data (sec->owner, sec)->lineno_count |
| 5919 | > max_lineno_count)) |
| 5920 | max_lineno_count = |
| 5921 | xcoff_section_data (sec->owner, sec)->lineno_count; |
| 5922 | if (sec->reloc_count > max_reloc_count) |
| 5923 | max_reloc_count = sec->reloc_count; |
| 5924 | } |
| 5925 | else if (p->type == bfd_section_reloc_link_order |
| 5926 | || p->type == bfd_symbol_reloc_link_order) |
| 5927 | ++o->reloc_count; |
| 5928 | } |
| 5929 | } |
| 5930 | |
| 5931 | /* Compute the file positions for all the sections. */ |
| 5932 | if (abfd->output_has_begun) |
| 5933 | { |
| 5934 | if (xcoff_hash_table (info)->file_align != 0) |
| 5935 | abort (); |
| 5936 | } |
| 5937 | else |
| 5938 | { |
| 5939 | bfd_vma file_align; |
| 5940 | |
| 5941 | file_align = xcoff_hash_table (info)->file_align; |
| 5942 | if (file_align != 0) |
| 5943 | { |
| 5944 | bfd_boolean saw_contents; |
| 5945 | int indx; |
| 5946 | file_ptr sofar; |
| 5947 | |
| 5948 | /* Insert .pad sections before every section which has |
| 5949 | contents and is loaded, if it is preceded by some other |
| 5950 | section which has contents and is loaded. */ |
| 5951 | saw_contents = TRUE; |
| 5952 | for (o = abfd->sections; o != NULL; o = o->next) |
| 5953 | { |
| 5954 | if (strcmp (o->name, ".pad") == 0) |
| 5955 | saw_contents = FALSE; |
| 5956 | else if ((o->flags & SEC_HAS_CONTENTS) != 0 |
| 5957 | && (o->flags & SEC_LOAD) != 0) |
| 5958 | { |
| 5959 | if (! saw_contents) |
| 5960 | saw_contents = TRUE; |
| 5961 | else |
| 5962 | { |
| 5963 | asection *n; |
| 5964 | |
| 5965 | /* Create a pad section and place it before the section |
| 5966 | that needs padding. This requires unlinking and |
| 5967 | relinking the bfd's section list. */ |
| 5968 | |
| 5969 | n = bfd_make_section_anyway_with_flags (abfd, ".pad", |
| 5970 | SEC_HAS_CONTENTS); |
| 5971 | n->alignment_power = 0; |
| 5972 | |
| 5973 | bfd_section_list_remove (abfd, n); |
| 5974 | bfd_section_list_insert_before (abfd, o, n); |
| 5975 | saw_contents = FALSE; |
| 5976 | } |
| 5977 | } |
| 5978 | } |
| 5979 | |
| 5980 | /* Reset the section indices after inserting the new |
| 5981 | sections. */ |
| 5982 | indx = 0; |
| 5983 | for (o = abfd->sections; o != NULL; o = o->next) |
| 5984 | { |
| 5985 | ++indx; |
| 5986 | o->target_index = indx; |
| 5987 | } |
| 5988 | BFD_ASSERT ((unsigned int) indx == abfd->section_count); |
| 5989 | |
| 5990 | /* Work out appropriate sizes for the .pad sections to force |
| 5991 | each section to land on a page boundary. This bit of |
| 5992 | code knows what compute_section_file_positions is going |
| 5993 | to do. */ |
| 5994 | sofar = bfd_coff_filhsz (abfd); |
| 5995 | sofar += bfd_coff_aoutsz (abfd); |
| 5996 | sofar += abfd->section_count * bfd_coff_scnhsz (abfd); |
| 5997 | for (o = abfd->sections; o != NULL; o = o->next) |
| 5998 | if ((bfd_xcoff_is_reloc_count_overflow |
| 5999 | (abfd, (bfd_vma) o->reloc_count)) |
| 6000 | || (bfd_xcoff_is_lineno_count_overflow |
| 6001 | (abfd, (bfd_vma) o->lineno_count))) |
| 6002 | /* 64 does not overflow, need to check if 32 does */ |
| 6003 | sofar += bfd_coff_scnhsz (abfd); |
| 6004 | |
| 6005 | for (o = abfd->sections; o != NULL; o = o->next) |
| 6006 | { |
| 6007 | if (strcmp (o->name, ".pad") == 0) |
| 6008 | { |
| 6009 | bfd_vma pageoff; |
| 6010 | |
| 6011 | BFD_ASSERT (o->size == 0); |
| 6012 | pageoff = sofar & (file_align - 1); |
| 6013 | if (pageoff != 0) |
| 6014 | { |
| 6015 | o->size = file_align - pageoff; |
| 6016 | sofar += file_align - pageoff; |
| 6017 | o->flags |= SEC_HAS_CONTENTS; |
| 6018 | } |
| 6019 | } |
| 6020 | else |
| 6021 | { |
| 6022 | if ((o->flags & SEC_HAS_CONTENTS) != 0) |
| 6023 | sofar += BFD_ALIGN (o->size, |
| 6024 | 1 << o->alignment_power); |
| 6025 | } |
| 6026 | } |
| 6027 | } |
| 6028 | |
| 6029 | if (! bfd_coff_compute_section_file_positions (abfd)) |
| 6030 | goto error_return; |
| 6031 | } |
| 6032 | |
| 6033 | /* Allocate space for the pointers we need to keep for the relocs. */ |
| 6034 | { |
| 6035 | unsigned int i; |
| 6036 | |
| 6037 | /* We use section_count + 1, rather than section_count, because |
| 6038 | the target_index fields are 1 based. */ |
| 6039 | amt = abfd->section_count + 1; |
| 6040 | amt *= sizeof (struct xcoff_link_section_info); |
| 6041 | flinfo.section_info = bfd_malloc (amt); |
| 6042 | if (flinfo.section_info == NULL) |
| 6043 | goto error_return; |
| 6044 | for (i = 0; i <= abfd->section_count; i++) |
| 6045 | { |
| 6046 | flinfo.section_info[i].relocs = NULL; |
| 6047 | flinfo.section_info[i].rel_hashes = NULL; |
| 6048 | flinfo.section_info[i].toc_rel_hashes = NULL; |
| 6049 | } |
| 6050 | } |
| 6051 | |
| 6052 | /* Set the file positions for the relocs. */ |
| 6053 | rel_filepos = obj_relocbase (abfd); |
| 6054 | relsz = bfd_coff_relsz (abfd); |
| 6055 | max_output_reloc_count = 0; |
| 6056 | for (o = abfd->sections; o != NULL; o = o->next) |
| 6057 | { |
| 6058 | if (o->reloc_count == 0) |
| 6059 | o->rel_filepos = 0; |
| 6060 | else |
| 6061 | { |
| 6062 | /* A stripped file has no relocs. However, we still |
| 6063 | allocate the buffers, so that later code doesn't have to |
| 6064 | worry about whether we are stripping or not. */ |
| 6065 | if (info->strip == strip_all) |
| 6066 | o->rel_filepos = 0; |
| 6067 | else |
| 6068 | { |
| 6069 | o->flags |= SEC_RELOC; |
| 6070 | o->rel_filepos = rel_filepos; |
| 6071 | rel_filepos += o->reloc_count * relsz; |
| 6072 | } |
| 6073 | |
| 6074 | /* We don't know the indices of global symbols until we have |
| 6075 | written out all the local symbols. For each section in |
| 6076 | the output file, we keep an array of pointers to hash |
| 6077 | table entries. Each entry in the array corresponds to a |
| 6078 | reloc. When we find a reloc against a global symbol, we |
| 6079 | set the corresponding entry in this array so that we can |
| 6080 | fix up the symbol index after we have written out all the |
| 6081 | local symbols. |
| 6082 | |
| 6083 | Because of this problem, we also keep the relocs in |
| 6084 | memory until the end of the link. This wastes memory. |
| 6085 | We could backpatch the file later, I suppose, although it |
| 6086 | would be slow. */ |
| 6087 | amt = o->reloc_count; |
| 6088 | amt *= sizeof (struct internal_reloc); |
| 6089 | flinfo.section_info[o->target_index].relocs = bfd_malloc (amt); |
| 6090 | |
| 6091 | amt = o->reloc_count; |
| 6092 | amt *= sizeof (struct xcoff_link_hash_entry *); |
| 6093 | flinfo.section_info[o->target_index].rel_hashes = bfd_malloc (amt); |
| 6094 | |
| 6095 | if (flinfo.section_info[o->target_index].relocs == NULL |
| 6096 | || flinfo.section_info[o->target_index].rel_hashes == NULL) |
| 6097 | goto error_return; |
| 6098 | |
| 6099 | if (o->reloc_count > max_output_reloc_count) |
| 6100 | max_output_reloc_count = o->reloc_count; |
| 6101 | } |
| 6102 | } |
| 6103 | |
| 6104 | /* We now know the size of the relocs, so we can determine the file |
| 6105 | positions of the line numbers. */ |
| 6106 | line_filepos = rel_filepos; |
| 6107 | flinfo.line_filepos = line_filepos; |
| 6108 | linesz = bfd_coff_linesz (abfd); |
| 6109 | for (o = abfd->sections; o != NULL; o = o->next) |
| 6110 | { |
| 6111 | if (o->lineno_count == 0) |
| 6112 | o->line_filepos = 0; |
| 6113 | else |
| 6114 | { |
| 6115 | o->line_filepos = line_filepos; |
| 6116 | line_filepos += o->lineno_count * linesz; |
| 6117 | } |
| 6118 | |
| 6119 | /* Reset the reloc and lineno counts, so that we can use them to |
| 6120 | count the number of entries we have output so far. */ |
| 6121 | o->reloc_count = 0; |
| 6122 | o->lineno_count = 0; |
| 6123 | } |
| 6124 | |
| 6125 | obj_sym_filepos (abfd) = line_filepos; |
| 6126 | |
| 6127 | /* Figure out the largest number of symbols in an input BFD. Take |
| 6128 | the opportunity to clear the output_has_begun fields of all the |
| 6129 | input BFD's. We want at least 6 symbols, since that is the |
| 6130 | number which xcoff_write_global_symbol may need. */ |
| 6131 | max_sym_count = 6; |
| 6132 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
| 6133 | { |
| 6134 | bfd_size_type sz; |
| 6135 | |
| 6136 | sub->output_has_begun = FALSE; |
| 6137 | sz = obj_raw_syment_count (sub); |
| 6138 | if (sz > max_sym_count) |
| 6139 | max_sym_count = sz; |
| 6140 | } |
| 6141 | |
| 6142 | /* Allocate some buffers used while linking. */ |
| 6143 | amt = max_sym_count * sizeof (struct internal_syment); |
| 6144 | flinfo.internal_syms = bfd_malloc (amt); |
| 6145 | |
| 6146 | amt = max_sym_count * sizeof (long); |
| 6147 | flinfo.sym_indices = bfd_malloc (amt); |
| 6148 | |
| 6149 | amt = (max_sym_count + 1) * symesz; |
| 6150 | flinfo.outsyms = bfd_malloc (amt); |
| 6151 | |
| 6152 | amt = max_lineno_count * bfd_coff_linesz (abfd); |
| 6153 | flinfo.linenos = bfd_malloc (amt); |
| 6154 | |
| 6155 | amt = max_contents_size; |
| 6156 | flinfo.contents = bfd_malloc (amt); |
| 6157 | |
| 6158 | amt = max_reloc_count * relsz; |
| 6159 | flinfo.external_relocs = bfd_malloc (amt); |
| 6160 | |
| 6161 | if ((flinfo.internal_syms == NULL && max_sym_count > 0) |
| 6162 | || (flinfo.sym_indices == NULL && max_sym_count > 0) |
| 6163 | || flinfo.outsyms == NULL |
| 6164 | || (flinfo.linenos == NULL && max_lineno_count > 0) |
| 6165 | || (flinfo.contents == NULL && max_contents_size > 0) |
| 6166 | || (flinfo.external_relocs == NULL && max_reloc_count > 0)) |
| 6167 | goto error_return; |
| 6168 | |
| 6169 | obj_raw_syment_count (abfd) = 0; |
| 6170 | |
| 6171 | /* Find a TOC symbol, if we need one. */ |
| 6172 | if (!xcoff_find_tc0 (abfd, &flinfo)) |
| 6173 | goto error_return; |
| 6174 | |
| 6175 | /* We now know the position of everything in the file, except that |
| 6176 | we don't know the size of the symbol table and therefore we don't |
| 6177 | know where the string table starts. We just build the string |
| 6178 | table in memory as we go along. We process all the relocations |
| 6179 | for a single input file at once. */ |
| 6180 | for (o = abfd->sections; o != NULL; o = o->next) |
| 6181 | { |
| 6182 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
| 6183 | { |
| 6184 | if (p->type == bfd_indirect_link_order |
| 6185 | && p->u.indirect.section->owner->xvec == abfd->xvec) |
| 6186 | { |
| 6187 | sub = p->u.indirect.section->owner; |
| 6188 | if (! sub->output_has_begun) |
| 6189 | { |
| 6190 | if (! xcoff_link_input_bfd (&flinfo, sub)) |
| 6191 | goto error_return; |
| 6192 | sub->output_has_begun = TRUE; |
| 6193 | } |
| 6194 | } |
| 6195 | else if (p->type == bfd_section_reloc_link_order |
| 6196 | || p->type == bfd_symbol_reloc_link_order) |
| 6197 | { |
| 6198 | if (! xcoff_reloc_link_order (abfd, &flinfo, o, p)) |
| 6199 | goto error_return; |
| 6200 | } |
| 6201 | else |
| 6202 | { |
| 6203 | if (! _bfd_default_link_order (abfd, info, o, p)) |
| 6204 | goto error_return; |
| 6205 | } |
| 6206 | } |
| 6207 | } |
| 6208 | |
| 6209 | /* Free up the buffers used by xcoff_link_input_bfd. */ |
| 6210 | if (flinfo.internal_syms != NULL) |
| 6211 | { |
| 6212 | free (flinfo.internal_syms); |
| 6213 | flinfo.internal_syms = NULL; |
| 6214 | } |
| 6215 | if (flinfo.sym_indices != NULL) |
| 6216 | { |
| 6217 | free (flinfo.sym_indices); |
| 6218 | flinfo.sym_indices = NULL; |
| 6219 | } |
| 6220 | if (flinfo.linenos != NULL) |
| 6221 | { |
| 6222 | free (flinfo.linenos); |
| 6223 | flinfo.linenos = NULL; |
| 6224 | } |
| 6225 | if (flinfo.contents != NULL) |
| 6226 | { |
| 6227 | free (flinfo.contents); |
| 6228 | flinfo.contents = NULL; |
| 6229 | } |
| 6230 | if (flinfo.external_relocs != NULL) |
| 6231 | { |
| 6232 | free (flinfo.external_relocs); |
| 6233 | flinfo.external_relocs = NULL; |
| 6234 | } |
| 6235 | |
| 6236 | /* The value of the last C_FILE symbol is supposed to be -1. Write |
| 6237 | it out again. */ |
| 6238 | if (flinfo.last_file_index != -1) |
| 6239 | { |
| 6240 | flinfo.last_file.n_value = -(bfd_vma) 1; |
| 6241 | bfd_coff_swap_sym_out (abfd, (void *) &flinfo.last_file, |
| 6242 | (void *) flinfo.outsyms); |
| 6243 | pos = obj_sym_filepos (abfd) + flinfo.last_file_index * symesz; |
| 6244 | if (bfd_seek (abfd, pos, SEEK_SET) != 0 |
| 6245 | || bfd_bwrite (flinfo.outsyms, symesz, abfd) != symesz) |
| 6246 | goto error_return; |
| 6247 | } |
| 6248 | |
| 6249 | /* Write out all the global symbols which do not come from XCOFF |
| 6250 | input files. */ |
| 6251 | bfd_hash_traverse (&info->hash->table, xcoff_write_global_symbol, &flinfo); |
| 6252 | |
| 6253 | if (flinfo.outsyms != NULL) |
| 6254 | { |
| 6255 | free (flinfo.outsyms); |
| 6256 | flinfo.outsyms = NULL; |
| 6257 | } |
| 6258 | |
| 6259 | /* Now that we have written out all the global symbols, we know the |
| 6260 | symbol indices to use for relocs against them, and we can finally |
| 6261 | write out the relocs. */ |
| 6262 | amt = max_output_reloc_count * relsz; |
| 6263 | external_relocs = bfd_malloc (amt); |
| 6264 | if (external_relocs == NULL && max_output_reloc_count != 0) |
| 6265 | goto error_return; |
| 6266 | |
| 6267 | for (o = abfd->sections; o != NULL; o = o->next) |
| 6268 | { |
| 6269 | struct internal_reloc *irel; |
| 6270 | struct internal_reloc *irelend; |
| 6271 | struct xcoff_link_hash_entry **rel_hash; |
| 6272 | struct xcoff_toc_rel_hash *toc_rel_hash; |
| 6273 | bfd_byte *erel; |
| 6274 | bfd_size_type rel_size; |
| 6275 | |
| 6276 | /* A stripped file has no relocs. */ |
| 6277 | if (info->strip == strip_all) |
| 6278 | { |
| 6279 | o->reloc_count = 0; |
| 6280 | continue; |
| 6281 | } |
| 6282 | |
| 6283 | if (o->reloc_count == 0) |
| 6284 | continue; |
| 6285 | |
| 6286 | irel = flinfo.section_info[o->target_index].relocs; |
| 6287 | irelend = irel + o->reloc_count; |
| 6288 | rel_hash = flinfo.section_info[o->target_index].rel_hashes; |
| 6289 | for (; irel < irelend; irel++, rel_hash++) |
| 6290 | { |
| 6291 | if (*rel_hash != NULL) |
| 6292 | { |
| 6293 | if ((*rel_hash)->indx < 0) |
| 6294 | { |
| 6295 | (*info->callbacks->unattached_reloc) |
| 6296 | (info, (*rel_hash)->root.root.string, |
| 6297 | NULL, o, irel->r_vaddr); |
| 6298 | (*rel_hash)->indx = 0; |
| 6299 | } |
| 6300 | irel->r_symndx = (*rel_hash)->indx; |
| 6301 | } |
| 6302 | } |
| 6303 | |
| 6304 | for (toc_rel_hash = flinfo.section_info[o->target_index].toc_rel_hashes; |
| 6305 | toc_rel_hash != NULL; |
| 6306 | toc_rel_hash = toc_rel_hash->next) |
| 6307 | { |
| 6308 | if (toc_rel_hash->h->u.toc_indx < 0) |
| 6309 | { |
| 6310 | (*info->callbacks->unattached_reloc) |
| 6311 | (info, toc_rel_hash->h->root.root.string, |
| 6312 | NULL, o, toc_rel_hash->rel->r_vaddr); |
| 6313 | toc_rel_hash->h->u.toc_indx = 0; |
| 6314 | } |
| 6315 | toc_rel_hash->rel->r_symndx = toc_rel_hash->h->u.toc_indx; |
| 6316 | } |
| 6317 | |
| 6318 | /* XCOFF requires that the relocs be sorted by address. We tend |
| 6319 | to produce them in the order in which their containing csects |
| 6320 | appear in the symbol table, which is not necessarily by |
| 6321 | address. So we sort them here. There may be a better way to |
| 6322 | do this. */ |
| 6323 | qsort ((void *) flinfo.section_info[o->target_index].relocs, |
| 6324 | o->reloc_count, sizeof (struct internal_reloc), |
| 6325 | xcoff_sort_relocs); |
| 6326 | |
| 6327 | irel = flinfo.section_info[o->target_index].relocs; |
| 6328 | irelend = irel + o->reloc_count; |
| 6329 | erel = external_relocs; |
| 6330 | for (; irel < irelend; irel++, rel_hash++, erel += relsz) |
| 6331 | bfd_coff_swap_reloc_out (abfd, (void *) irel, (void *) erel); |
| 6332 | |
| 6333 | rel_size = relsz * o->reloc_count; |
| 6334 | if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0 |
| 6335 | || bfd_bwrite ((void *) external_relocs, rel_size, abfd) != rel_size) |
| 6336 | goto error_return; |
| 6337 | } |
| 6338 | |
| 6339 | if (external_relocs != NULL) |
| 6340 | { |
| 6341 | free (external_relocs); |
| 6342 | external_relocs = NULL; |
| 6343 | } |
| 6344 | |
| 6345 | /* Free up the section information. */ |
| 6346 | if (flinfo.section_info != NULL) |
| 6347 | { |
| 6348 | unsigned int i; |
| 6349 | |
| 6350 | for (i = 0; i < abfd->section_count; i++) |
| 6351 | { |
| 6352 | if (flinfo.section_info[i].relocs != NULL) |
| 6353 | free (flinfo.section_info[i].relocs); |
| 6354 | if (flinfo.section_info[i].rel_hashes != NULL) |
| 6355 | free (flinfo.section_info[i].rel_hashes); |
| 6356 | } |
| 6357 | free (flinfo.section_info); |
| 6358 | flinfo.section_info = NULL; |
| 6359 | } |
| 6360 | |
| 6361 | /* Write out the loader section contents. */ |
| 6362 | o = xcoff_hash_table (info)->loader_section; |
| 6363 | if (o) |
| 6364 | { |
| 6365 | BFD_ASSERT ((bfd_byte *) flinfo.ldrel |
| 6366 | == (xcoff_hash_table (info)->loader_section->contents |
| 6367 | + xcoff_hash_table (info)->ldhdr.l_impoff)); |
| 6368 | if (!bfd_set_section_contents (abfd, o->output_section, o->contents, |
| 6369 | (file_ptr) o->output_offset, o->size)) |
| 6370 | goto error_return; |
| 6371 | } |
| 6372 | |
| 6373 | /* Write out the magic sections. */ |
| 6374 | o = xcoff_hash_table (info)->linkage_section; |
| 6375 | if (o->size > 0 |
| 6376 | && ! bfd_set_section_contents (abfd, o->output_section, o->contents, |
| 6377 | (file_ptr) o->output_offset, |
| 6378 | o->size)) |
| 6379 | goto error_return; |
| 6380 | o = xcoff_hash_table (info)->toc_section; |
| 6381 | if (o->size > 0 |
| 6382 | && ! bfd_set_section_contents (abfd, o->output_section, o->contents, |
| 6383 | (file_ptr) o->output_offset, |
| 6384 | o->size)) |
| 6385 | goto error_return; |
| 6386 | o = xcoff_hash_table (info)->descriptor_section; |
| 6387 | if (o->size > 0 |
| 6388 | && ! bfd_set_section_contents (abfd, o->output_section, o->contents, |
| 6389 | (file_ptr) o->output_offset, |
| 6390 | o->size)) |
| 6391 | goto error_return; |
| 6392 | |
| 6393 | /* Write out the string table. */ |
| 6394 | pos = obj_sym_filepos (abfd) + obj_raw_syment_count (abfd) * symesz; |
| 6395 | if (bfd_seek (abfd, pos, SEEK_SET) != 0) |
| 6396 | goto error_return; |
| 6397 | H_PUT_32 (abfd, |
| 6398 | _bfd_stringtab_size (flinfo.strtab) + STRING_SIZE_SIZE, |
| 6399 | strbuf); |
| 6400 | amt = STRING_SIZE_SIZE; |
| 6401 | if (bfd_bwrite (strbuf, amt, abfd) != amt) |
| 6402 | goto error_return; |
| 6403 | if (! _bfd_stringtab_emit (abfd, flinfo.strtab)) |
| 6404 | goto error_return; |
| 6405 | |
| 6406 | _bfd_stringtab_free (flinfo.strtab); |
| 6407 | |
| 6408 | /* Write out the debugging string table. */ |
| 6409 | o = xcoff_hash_table (info)->debug_section; |
| 6410 | if (o != NULL) |
| 6411 | { |
| 6412 | struct bfd_strtab_hash *debug_strtab; |
| 6413 | |
| 6414 | debug_strtab = xcoff_hash_table (info)->debug_strtab; |
| 6415 | BFD_ASSERT (o->output_section->size - o->output_offset |
| 6416 | >= _bfd_stringtab_size (debug_strtab)); |
| 6417 | pos = o->output_section->filepos + o->output_offset; |
| 6418 | if (bfd_seek (abfd, pos, SEEK_SET) != 0) |
| 6419 | goto error_return; |
| 6420 | if (! _bfd_stringtab_emit (abfd, debug_strtab)) |
| 6421 | goto error_return; |
| 6422 | } |
| 6423 | |
| 6424 | /* Setting symcount to 0 will cause write_object_contents to |
| 6425 | not try to write out the symbols. */ |
| 6426 | abfd->symcount = 0; |
| 6427 | |
| 6428 | return TRUE; |
| 6429 | |
| 6430 | error_return: |
| 6431 | if (flinfo.strtab != NULL) |
| 6432 | _bfd_stringtab_free (flinfo.strtab); |
| 6433 | |
| 6434 | if (flinfo.section_info != NULL) |
| 6435 | { |
| 6436 | unsigned int i; |
| 6437 | |
| 6438 | for (i = 0; i < abfd->section_count; i++) |
| 6439 | { |
| 6440 | if (flinfo.section_info[i].relocs != NULL) |
| 6441 | free (flinfo.section_info[i].relocs); |
| 6442 | if (flinfo.section_info[i].rel_hashes != NULL) |
| 6443 | free (flinfo.section_info[i].rel_hashes); |
| 6444 | } |
| 6445 | free (flinfo.section_info); |
| 6446 | } |
| 6447 | |
| 6448 | if (flinfo.internal_syms != NULL) |
| 6449 | free (flinfo.internal_syms); |
| 6450 | if (flinfo.sym_indices != NULL) |
| 6451 | free (flinfo.sym_indices); |
| 6452 | if (flinfo.outsyms != NULL) |
| 6453 | free (flinfo.outsyms); |
| 6454 | if (flinfo.linenos != NULL) |
| 6455 | free (flinfo.linenos); |
| 6456 | if (flinfo.contents != NULL) |
| 6457 | free (flinfo.contents); |
| 6458 | if (flinfo.external_relocs != NULL) |
| 6459 | free (flinfo.external_relocs); |
| 6460 | if (external_relocs != NULL) |
| 6461 | free (external_relocs); |
| 6462 | return FALSE; |
| 6463 | } |