1/* Stabs in sections linking support. 2 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 3 2006, 2007 Free Software Foundation, Inc. 4 Written by Ian Lance Taylor, Cygnus Support. 5 6 This file is part of BFD, the Binary File Descriptor library. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 2 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the Free Software 20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 21 22/* This file contains support for linking stabs in sections, as used 23 on COFF and ELF. */ 24 25#include "sysdep.h" 26#include "bfd.h" 27#include "libbfd.h" 28#include "aout/stab_gnu.h" 29#include "safe-ctype.h" 30 31/* Stabs entries use a 12 byte format: 32 4 byte string table index 33 1 byte stab type 34 1 byte stab other field 35 2 byte stab desc field 36 4 byte stab value 37 FIXME: This will have to change for a 64 bit object format. 38 39 The stabs symbols are divided into compilation units. For the 40 first entry in each unit, the type of 0, the value is the length of 41 the string table for this unit, and the desc field is the number of 42 stabs symbols for this unit. */ 43 44#define STRDXOFF 0 45#define TYPEOFF 4 46#define OTHEROFF 5 47#define DESCOFF 6 48#define VALOFF 8 49#define STABSIZE 12 50 51/* A linked list of totals that we have found for a particular header 52 file. A total is a unique identifier for a particular BINCL...EINCL 53 sequence of STABs that can be used to identify duplicate sequences. 54 It consists of three fields, 'sum_chars' which is the sum of all the 55 STABS characters; 'num_chars' which is the number of these charactes 56 and 'symb' which is a buffer of all the symbols in the sequence. This 57 buffer is only checked as a last resort. */ 58 59struct stab_link_includes_totals 60{ 61 struct stab_link_includes_totals *next; 62 bfd_vma sum_chars; /* Accumulated sum of STABS characters. */ 63 bfd_vma num_chars; /* Number of STABS characters. */ 64 const char* symb; /* The STABS characters themselves. */ 65}; 66 67/* An entry in the header file hash table. */ 68 69struct stab_link_includes_entry 70{ 71 struct bfd_hash_entry root; 72 /* List of totals we have found for this file. */ 73 struct stab_link_includes_totals *totals; 74}; 75 76/* This structure is used to hold a list of N_BINCL symbols, some of 77 which might be converted into N_EXCL symbols. */ 78 79struct stab_excl_list 80{ 81 /* The next symbol to convert. */ 82 struct stab_excl_list *next; 83 /* The offset to this symbol in the section contents. */ 84 bfd_size_type offset; 85 /* The value to use for the symbol. */ 86 bfd_vma val; 87 /* The type of this symbol (N_BINCL or N_EXCL). */ 88 int type; 89}; 90 91/* This structure is stored with each .stab section. */ 92 93struct stab_section_info 94{ 95 /* This is a linked list of N_BINCL symbols which should be 96 converted into N_EXCL symbols. */ 97 struct stab_excl_list *excls; 98 99 /* This is used to map input stab offsets within their sections 100 to output stab offsets, to take into account stabs that have 101 been deleted. If it is NULL, the output offsets are the same 102 as the input offsets, because no stabs have been deleted from 103 this section. Otherwise the i'th entry is the number of 104 bytes of stabs that have been deleted prior to the i'th 105 stab. */ 106 bfd_size_type *cumulative_skips; 107 108 /* This is an array of string indices. For each stab symbol, we 109 store the string index here. If a stab symbol should not be 110 included in the final output, the string index is -1. */ 111 bfd_size_type stridxs[1]; 112}; 113 114 115/* The function to create a new entry in the header file hash table. */ 116 117static struct bfd_hash_entry * 118stab_link_includes_newfunc (struct bfd_hash_entry *entry, 119 struct bfd_hash_table *table, 120 const char *string) 121{ 122 struct stab_link_includes_entry *ret = 123 (struct stab_link_includes_entry *) entry; 124 125 /* Allocate the structure if it has not already been allocated by a 126 subclass. */ 127 if (ret == NULL) 128 ret = bfd_hash_allocate (table, 129 sizeof (struct stab_link_includes_entry)); 130 if (ret == NULL) 131 return NULL; 132 133 /* Call the allocation method of the superclass. */ 134 ret = ((struct stab_link_includes_entry *) 135 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); 136 if (ret) 137 /* Set local fields. */ 138 ret->totals = NULL; 139 140 return (struct bfd_hash_entry *) ret; 141} 142 143/* This function is called for each input file from the add_symbols 144 pass of the linker. */ 145 146bfd_boolean 147_bfd_link_section_stabs (bfd *abfd, 148 struct stab_info *sinfo, 149 asection *stabsec, 150 asection *stabstrsec, 151 void * *psecinfo, 152 bfd_size_type *pstring_offset) 153{ 154 bfd_boolean first; 155 bfd_size_type count, amt; 156 struct stab_section_info *secinfo; 157 bfd_byte *stabbuf = NULL; 158 bfd_byte *stabstrbuf = NULL; 159 bfd_byte *sym, *symend; 160 bfd_size_type stroff, next_stroff, skip; 161 bfd_size_type *pstridx; 162 163 if (stabsec->size == 0 164 || stabstrsec->size == 0) 165 /* This file does not contain stabs debugging information. */ 166 return TRUE; 167 168 if (stabsec->size % STABSIZE != 0) 169 /* Something is wrong with the format of these stab symbols. 170 Don't try to optimize them. */ 171 return TRUE; 172 173 if ((stabstrsec->flags & SEC_RELOC) != 0) 174 /* We shouldn't see relocations in the strings, and we aren't 175 prepared to handle them. */ 176 return TRUE; 177 178 if (bfd_is_abs_section (stabsec->output_section) 179 || bfd_is_abs_section (stabstrsec->output_section)) 180 /* At least one of the sections is being discarded from the 181 link, so we should just ignore them. */ 182 return TRUE; 183 184 first = FALSE; 185 186 if (sinfo->stabstr == NULL) 187 { 188 flagword flags; 189 190 /* Initialize the stabs information we need to keep track of. */ 191 first = TRUE; 192 sinfo->strings = _bfd_stringtab_init (); 193 if (sinfo->strings == NULL) 194 goto error_return; 195 /* Make sure the first byte is zero. */ 196 (void) _bfd_stringtab_add (sinfo->strings, "", TRUE, TRUE); 197 if (! bfd_hash_table_init (&sinfo->includes, 198 stab_link_includes_newfunc, 199 sizeof (struct stab_link_includes_entry))) 200 goto error_return; 201 flags = (SEC_HAS_CONTENTS | SEC_READONLY | SEC_DEBUGGING 202 | SEC_LINKER_CREATED); 203 sinfo->stabstr = bfd_make_section_anyway_with_flags (abfd, ".stabstr", 204 flags); 205 if (sinfo->stabstr == NULL) 206 goto error_return; 207 } 208 209 /* Initialize the information we are going to store for this .stab 210 section. */ 211 count = stabsec->size / STABSIZE; 212 213 amt = sizeof (struct stab_section_info); 214 amt += (count - 1) * sizeof (bfd_size_type); 215 *psecinfo = bfd_alloc (abfd, amt); 216 if (*psecinfo == NULL) 217 goto error_return; 218 219 secinfo = (struct stab_section_info *) *psecinfo; 220 secinfo->excls = NULL; 221 stabsec->rawsize = stabsec->size; 222 secinfo->cumulative_skips = NULL; 223 memset (secinfo->stridxs, 0, (size_t) count * sizeof (bfd_size_type)); 224 225 /* Read the stabs information from abfd. */ 226 if (!bfd_malloc_and_get_section (abfd, stabsec, &stabbuf) 227 || !bfd_malloc_and_get_section (abfd, stabstrsec, &stabstrbuf)) 228 goto error_return; 229 230 /* Look through the stabs symbols, work out the new string indices, 231 and identify N_BINCL symbols which can be eliminated. */ 232 stroff = 0; 233 /* The stabs sections can be split when 234 -split-by-reloc/-split-by-file is used. We must keep track of 235 each stab section's place in the single concatenated string 236 table. */ 237 next_stroff = pstring_offset ? *pstring_offset : 0; 238 skip = 0; 239 240 symend = stabbuf + stabsec->size; 241 for (sym = stabbuf, pstridx = secinfo->stridxs; 242 sym < symend; 243 sym += STABSIZE, ++pstridx) 244 { 245 bfd_size_type symstroff; 246 int type; 247 const char *string; 248 249 if (*pstridx != 0) 250 /* This symbol has already been handled by an N_BINCL pass. */ 251 continue; 252 253 type = sym[TYPEOFF]; 254 255 if (type == 0) 256 { 257 /* Special type 0 stabs indicate the offset to the next 258 string table. We only copy the very first one. */ 259 stroff = next_stroff; 260 next_stroff += bfd_get_32 (abfd, sym + 8); 261 if (pstring_offset) 262 *pstring_offset = next_stroff; 263 if (! first) 264 { 265 *pstridx = (bfd_size_type) -1; 266 ++skip; 267 continue; 268 } 269 first = FALSE; 270 } 271 272 /* Store the string in the hash table, and record the index. */ 273 symstroff = stroff + bfd_get_32 (abfd, sym + STRDXOFF); 274 if (symstroff >= stabstrsec->size) 275 { 276 (*_bfd_error_handler) 277 (_("%B(%A+0x%lx): Stabs entry has invalid string index."), 278 abfd, stabsec, (long) (sym - stabbuf)); 279 bfd_set_error (bfd_error_bad_value); 280 goto error_return; 281 } 282 string = (char *) stabstrbuf + symstroff; 283 *pstridx = _bfd_stringtab_add (sinfo->strings, string, TRUE, TRUE); 284 285 /* An N_BINCL symbol indicates the start of the stabs entries 286 for a header file. We need to scan ahead to the next N_EINCL 287 symbol, ignoring nesting, adding up all the characters in the 288 symbol names, not including the file numbers in types (the 289 first number after an open parenthesis). */ 290 if (type == (int) N_BINCL) 291 { 292 bfd_vma sum_chars; 293 bfd_vma num_chars; 294 bfd_vma buf_len = 0; 295 char * symb; 296 char * symb_rover; 297 int nest; 298 bfd_byte * incl_sym; 299 struct stab_link_includes_entry * incl_entry; 300 struct stab_link_includes_totals * t; 301 struct stab_excl_list * ne; 302 303 symb = symb_rover = NULL; 304 sum_chars = num_chars = 0; 305 nest = 0; 306 307 for (incl_sym = sym + STABSIZE; 308 incl_sym < symend; 309 incl_sym += STABSIZE) 310 { 311 int incl_type; 312 313 incl_type = incl_sym[TYPEOFF]; 314 if (incl_type == 0) 315 break; 316 else if (incl_type == (int) N_EXCL) 317 continue; 318 else if (incl_type == (int) N_EINCL) 319 { 320 if (nest == 0) 321 break; 322 --nest; 323 } 324 else if (incl_type == (int) N_BINCL) 325 ++nest; 326 else if (nest == 0) 327 { 328 const char *str; 329 330 str = ((char *) stabstrbuf 331 + stroff 332 + bfd_get_32 (abfd, incl_sym + STRDXOFF)); 333 for (; *str != '\0'; str++) 334 { 335 if (num_chars >= buf_len) 336 { 337 buf_len += 32 * 1024; 338 symb = bfd_realloc (symb, buf_len); 339 if (symb == NULL) 340 goto error_return; 341 symb_rover = symb + num_chars; 342 } 343 * symb_rover ++ = * str; 344 sum_chars += *str; 345 num_chars ++; 346 if (*str == '(') 347 { 348 /* Skip the file number. */ 349 ++str; 350 while (ISDIGIT (*str)) 351 ++str; 352 --str; 353 } 354 } 355 } 356 } 357 358 BFD_ASSERT (num_chars == (bfd_vma) (symb_rover - symb)); 359 360 /* If we have already included a header file with the same 361 value, then replaced this one with an N_EXCL symbol. */ 362 incl_entry = (struct stab_link_includes_entry * ) 363 bfd_hash_lookup (&sinfo->includes, string, TRUE, TRUE); 364 if (incl_entry == NULL) 365 goto error_return; 366 367 for (t = incl_entry->totals; t != NULL; t = t->next) 368 if (t->sum_chars == sum_chars 369 && t->num_chars == num_chars 370 && memcmp (t->symb, symb, num_chars) == 0) 371 break; 372 373 /* Record this symbol, so that we can set the value 374 correctly. */ 375 amt = sizeof *ne; 376 ne = bfd_alloc (abfd, amt); 377 if (ne == NULL) 378 goto error_return; 379 ne->offset = sym - stabbuf; 380 ne->val = sum_chars; 381 ne->type = (int) N_BINCL; 382 ne->next = secinfo->excls; 383 secinfo->excls = ne; 384 385 if (t == NULL) 386 { 387 /* This is the first time we have seen this header file 388 with this set of stabs strings. */ 389 t = bfd_hash_allocate (&sinfo->includes, sizeof *t); 390 if (t == NULL) 391 goto error_return; 392 t->sum_chars = sum_chars; 393 t->num_chars = num_chars; 394 t->symb = bfd_realloc (symb, num_chars); /* Trim data down. */ 395 t->next = incl_entry->totals; 396 incl_entry->totals = t; 397 } 398 else 399 { 400 bfd_size_type *incl_pstridx; 401 402 /* We have seen this header file before. Tell the final 403 pass to change the type to N_EXCL. */ 404 ne->type = (int) N_EXCL; 405 406 /* Free off superfluous symbols. */ 407 free (symb); 408 409 /* Mark the skipped symbols. */ 410 411 nest = 0; 412 for (incl_sym = sym + STABSIZE, incl_pstridx = pstridx + 1; 413 incl_sym < symend; 414 incl_sym += STABSIZE, ++incl_pstridx) 415 { 416 int incl_type; 417 418 incl_type = incl_sym[TYPEOFF]; 419 420 if (incl_type == (int) N_EINCL) 421 { 422 if (nest == 0) 423 { 424 *incl_pstridx = (bfd_size_type) -1; 425 ++skip; 426 break; 427 } 428 --nest; 429 } 430 else if (incl_type == (int) N_BINCL) 431 ++nest; 432 else if (incl_type == (int) N_EXCL) 433 /* Keep existing exclusion marks. */ 434 continue; 435 else if (nest == 0) 436 { 437 *incl_pstridx = (bfd_size_type) -1; 438 ++skip; 439 } 440 } 441 } 442 } 443 } 444 445 free (stabbuf); 446 stabbuf = NULL; 447 free (stabstrbuf); 448 stabstrbuf = NULL; 449 450 /* We need to set the section sizes such that the linker will 451 compute the output section sizes correctly. We set the .stab 452 size to not include the entries we don't want. We set 453 SEC_EXCLUDE for the .stabstr section, so that it will be dropped 454 from the link. We record the size of the strtab in the first 455 .stabstr section we saw, and make sure we don't set SEC_EXCLUDE 456 for that section. */ 457 stabsec->size = (count - skip) * STABSIZE; 458 if (stabsec->size == 0) 459 stabsec->flags |= SEC_EXCLUDE | SEC_KEEP; 460 stabstrsec->flags |= SEC_EXCLUDE | SEC_KEEP; 461 sinfo->stabstr->size = _bfd_stringtab_size (sinfo->strings); 462 463 /* Calculate the `cumulative_skips' array now that stabs have been 464 deleted for this section. */ 465 466 if (skip != 0) 467 { 468 bfd_size_type i, offset; 469 bfd_size_type *pskips; 470 471 amt = count * sizeof (bfd_size_type); 472 secinfo->cumulative_skips = bfd_alloc (abfd, amt); 473 if (secinfo->cumulative_skips == NULL) 474 goto error_return; 475 476 pskips = secinfo->cumulative_skips; 477 pstridx = secinfo->stridxs; 478 offset = 0; 479 480 for (i = 0; i < count; i++, pskips++, pstridx++) 481 { 482 *pskips = offset; 483 if (*pstridx == (bfd_size_type) -1) 484 offset += STABSIZE; 485 } 486 487 BFD_ASSERT (offset != 0); 488 } 489 490 return TRUE; 491 492 error_return: 493 if (stabbuf != NULL) 494 free (stabbuf); 495 if (stabstrbuf != NULL) 496 free (stabstrbuf); 497 return FALSE; 498} 499 500/* This function is called for each input file before the stab 501 section is relocated. It discards stab entries for discarded 502 functions and variables. The function returns TRUE iff 503 any entries have been deleted. 504*/ 505 506bfd_boolean 507_bfd_discard_section_stabs (bfd *abfd, 508 asection *stabsec, 509 void * psecinfo, 510 bfd_boolean (*reloc_symbol_deleted_p) (bfd_vma, void *), 511 void * cookie) 512{ 513 bfd_size_type count, amt; 514 struct stab_section_info *secinfo; 515 bfd_byte *stabbuf = NULL; 516 bfd_byte *sym, *symend; 517 bfd_size_type skip; 518 bfd_size_type *pstridx; 519 int deleting; 520 521 if (stabsec->size == 0) 522 /* This file does not contain stabs debugging information. */ 523 return FALSE; 524 525 if (stabsec->size % STABSIZE != 0) 526 /* Something is wrong with the format of these stab symbols. 527 Don't try to optimize them. */ 528 return FALSE; 529 530 if ((stabsec->output_section != NULL 531 && bfd_is_abs_section (stabsec->output_section))) 532 /* At least one of the sections is being discarded from the 533 link, so we should just ignore them. */ 534 return FALSE; 535 536 /* We should have initialized our data in _bfd_link_stab_sections. 537 If there was some bizarre error reading the string sections, though, 538 we might not have. Bail rather than asserting. */ 539 if (psecinfo == NULL) 540 return FALSE; 541 542 count = stabsec->rawsize / STABSIZE; 543 secinfo = (struct stab_section_info *) psecinfo; 544 545 /* Read the stabs information from abfd. */ 546 if (!bfd_malloc_and_get_section (abfd, stabsec, &stabbuf)) 547 goto error_return; 548 549 /* Look through the stabs symbols and discard any information for 550 discarded functions. */ 551 skip = 0; 552 deleting = -1; 553 554 symend = stabbuf + stabsec->rawsize; 555 for (sym = stabbuf, pstridx = secinfo->stridxs; 556 sym < symend; 557 sym += STABSIZE, ++pstridx) 558 { 559 int type; 560 561 if (*pstridx == (bfd_size_type) -1) 562 /* This stab was deleted in a previous pass. */ 563 continue; 564 565 type = sym[TYPEOFF]; 566 567 if (type == (int) N_FUN) 568 { 569 int strx = bfd_get_32 (abfd, sym + STRDXOFF); 570 571 if (strx == 0) 572 { 573 if (deleting) 574 { 575 skip++; 576 *pstridx = -1; 577 } 578 deleting = -1; 579 continue; 580 } 581 deleting = 0; 582 if ((*reloc_symbol_deleted_p) (sym + VALOFF - stabbuf, cookie)) 583 deleting = 1; 584 } 585 586 if (deleting == 1) 587 { 588 *pstridx = -1; 589 skip++; 590 } 591 else if (deleting == -1) 592 { 593 /* Outside of a function. Check for deleted variables. */ 594 if (type == (int) N_STSYM || type == (int) N_LCSYM) 595 if ((*reloc_symbol_deleted_p) (sym + VALOFF - stabbuf, cookie)) 596 { 597 *pstridx = -1; 598 skip ++; 599 } 600 /* We should also check for N_GSYM entries which reference a 601 deleted global, but those are less harmful to debuggers 602 and would require parsing the stab strings. */ 603 } 604 } 605 606 free (stabbuf); 607 stabbuf = NULL; 608 609 /* Shrink the stabsec as needed. */ 610 stabsec->size -= skip * STABSIZE; 611 if (stabsec->size == 0) 612 stabsec->flags |= SEC_EXCLUDE | SEC_KEEP; 613 614 /* Recalculate the `cumulative_skips' array now that stabs have been 615 deleted for this section. */ 616 617 if (skip != 0) 618 { 619 bfd_size_type i, offset; 620 bfd_size_type *pskips; 621 622 if (secinfo->cumulative_skips == NULL) 623 { 624 amt = count * sizeof (bfd_size_type); 625 secinfo->cumulative_skips = bfd_alloc (abfd, amt); 626 if (secinfo->cumulative_skips == NULL) 627 goto error_return; 628 } 629 630 pskips = secinfo->cumulative_skips; 631 pstridx = secinfo->stridxs; 632 offset = 0; 633 634 for (i = 0; i < count; i++, pskips++, pstridx++) 635 { 636 *pskips = offset; 637 if (*pstridx == (bfd_size_type) -1) 638 offset += STABSIZE; 639 } 640 641 BFD_ASSERT (offset != 0); 642 } 643 644 return skip > 0; 645 646 error_return: 647 if (stabbuf != NULL) 648 free (stabbuf); 649 return FALSE; 650} 651 652/* Write out the stab section. This is called with the relocated 653 contents. */ 654 655bfd_boolean 656_bfd_write_section_stabs (bfd *output_bfd, 657 struct stab_info *sinfo, 658 asection *stabsec, 659 void * *psecinfo, 660 bfd_byte *contents) 661{ 662 struct stab_section_info *secinfo; 663 struct stab_excl_list *e; 664 bfd_byte *sym, *tosym, *symend; 665 bfd_size_type *pstridx; 666 667 secinfo = (struct stab_section_info *) *psecinfo; 668 669 if (secinfo == NULL) 670 return bfd_set_section_contents (output_bfd, stabsec->output_section, 671 contents, stabsec->output_offset, 672 stabsec->size); 673 674 /* Handle each N_BINCL entry. */ 675 for (e = secinfo->excls; e != NULL; e = e->next) 676 { 677 bfd_byte *excl_sym; 678 679 BFD_ASSERT (e->offset < stabsec->rawsize); 680 excl_sym = contents + e->offset; 681 bfd_put_32 (output_bfd, e->val, excl_sym + VALOFF); 682 excl_sym[TYPEOFF] = e->type; 683 } 684 685 /* Copy over all the stabs symbols, omitting the ones we don't want, 686 and correcting the string indices for those we do want. */ 687 tosym = contents; 688 symend = contents + stabsec->rawsize; 689 for (sym = contents, pstridx = secinfo->stridxs; 690 sym < symend; 691 sym += STABSIZE, ++pstridx) 692 { 693 if (*pstridx != (bfd_size_type) -1) 694 { 695 if (tosym != sym) 696 memcpy (tosym, sym, STABSIZE); 697 bfd_put_32 (output_bfd, *pstridx, tosym + STRDXOFF); 698 699 if (sym[TYPEOFF] == 0) 700 { 701 /* This is the header symbol for the stabs section. We 702 don't really need one, since we have merged all the 703 input stabs sections into one, but we generate one 704 for the benefit of readers which expect to see one. */ 705 BFD_ASSERT (sym == contents); 706 bfd_put_32 (output_bfd, _bfd_stringtab_size (sinfo->strings), 707 tosym + VALOFF); 708 bfd_put_16 (output_bfd, 709 stabsec->output_section->size / STABSIZE - 1, 710 tosym + DESCOFF); 711 } 712 713 tosym += STABSIZE; 714 } 715 } 716 717 BFD_ASSERT ((bfd_size_type) (tosym - contents) == stabsec->size); 718 719 return bfd_set_section_contents (output_bfd, stabsec->output_section, 720 contents, (file_ptr) stabsec->output_offset, 721 stabsec->size); 722} 723 724/* Write out the .stabstr section. */ 725 726bfd_boolean 727_bfd_write_stab_strings (bfd *output_bfd, struct stab_info *sinfo) 728{ 729 if (bfd_is_abs_section (sinfo->stabstr->output_section)) 730 /* The section was discarded from the link. */ 731 return TRUE; 732 733 BFD_ASSERT ((sinfo->stabstr->output_offset 734 + _bfd_stringtab_size (sinfo->strings)) 735 <= sinfo->stabstr->output_section->size); 736 737 if (bfd_seek (output_bfd, 738 (file_ptr) (sinfo->stabstr->output_section->filepos 739 + sinfo->stabstr->output_offset), 740 SEEK_SET) != 0) 741 return FALSE; 742 743 if (! _bfd_stringtab_emit (output_bfd, sinfo->strings)) 744 return FALSE; 745 746 /* We no longer need the stabs information. */ 747 _bfd_stringtab_free (sinfo->strings); 748 bfd_hash_table_free (&sinfo->includes); 749 750 return TRUE; 751} 752 753/* Adjust an address in the .stab section. Given OFFSET within 754 STABSEC, this returns the new offset in the adjusted stab section, 755 or -1 if the address refers to a stab which has been removed. */ 756 757bfd_vma 758_bfd_stab_section_offset (asection *stabsec, 759 void * psecinfo, 760 bfd_vma offset) 761{ 762 struct stab_section_info *secinfo; 763 764 secinfo = (struct stab_section_info *) psecinfo; 765 766 if (secinfo == NULL) 767 return offset; 768 769 if (offset >= stabsec->rawsize) 770 return offset - stabsec->rawsize + stabsec->size; 771 772 if (secinfo->cumulative_skips) 773 { 774 bfd_vma i; 775 776 i = offset / STABSIZE; 777 778 if (secinfo->stridxs [i] == (bfd_size_type) -1) 779 return (bfd_vma) -1; 780 781 return offset - secinfo->cumulative_skips [i]; 782 } 783 784 return offset; 785} 786