elf.c revision 130563
1/* ELF executable support for BFD. 2 3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 4 2002, 2003, 2004 Free Software Foundation, Inc. 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 21 22 23/* $FreeBSD: head/contrib/binutils/bfd/elf.c 130563 2004-06-16 06:02:14Z obrien $ */ 24 25 26/* SECTION 27 28 ELF backends 29 30 BFD support for ELF formats is being worked on. 31 Currently, the best supported back ends are for sparc and i386 32 (running svr4 or Solaris 2). 33 34 Documentation of the internals of the support code still needs 35 to be written. The code is changing quickly enough that we 36 haven't bothered yet. */ 37 38/* For sparc64-cross-sparc32. */ 39#define _SYSCALL32 40#include "bfd.h" 41#include "sysdep.h" 42#include "bfdlink.h" 43#include "libbfd.h" 44#define ARCH_SIZE 0 45#include "elf-bfd.h" 46#include "libiberty.h" 47 48static int elf_sort_sections (const void *, const void *); 49static bfd_boolean assign_file_positions_except_relocs (bfd *, struct bfd_link_info *); 50static bfd_boolean prep_headers (bfd *); 51static bfd_boolean swap_out_syms (bfd *, struct bfd_strtab_hash **, int) ; 52static bfd_boolean elfcore_read_notes (bfd *, file_ptr, bfd_size_type) ; 53 54/* Swap version information in and out. The version information is 55 currently size independent. If that ever changes, this code will 56 need to move into elfcode.h. */ 57 58/* Swap in a Verdef structure. */ 59 60void 61_bfd_elf_swap_verdef_in (bfd *abfd, 62 const Elf_External_Verdef *src, 63 Elf_Internal_Verdef *dst) 64{ 65 dst->vd_version = H_GET_16 (abfd, src->vd_version); 66 dst->vd_flags = H_GET_16 (abfd, src->vd_flags); 67 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx); 68 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt); 69 dst->vd_hash = H_GET_32 (abfd, src->vd_hash); 70 dst->vd_aux = H_GET_32 (abfd, src->vd_aux); 71 dst->vd_next = H_GET_32 (abfd, src->vd_next); 72} 73 74/* Swap out a Verdef structure. */ 75 76void 77_bfd_elf_swap_verdef_out (bfd *abfd, 78 const Elf_Internal_Verdef *src, 79 Elf_External_Verdef *dst) 80{ 81 H_PUT_16 (abfd, src->vd_version, dst->vd_version); 82 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags); 83 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx); 84 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt); 85 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash); 86 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux); 87 H_PUT_32 (abfd, src->vd_next, dst->vd_next); 88} 89 90/* Swap in a Verdaux structure. */ 91 92void 93_bfd_elf_swap_verdaux_in (bfd *abfd, 94 const Elf_External_Verdaux *src, 95 Elf_Internal_Verdaux *dst) 96{ 97 dst->vda_name = H_GET_32 (abfd, src->vda_name); 98 dst->vda_next = H_GET_32 (abfd, src->vda_next); 99} 100 101/* Swap out a Verdaux structure. */ 102 103void 104_bfd_elf_swap_verdaux_out (bfd *abfd, 105 const Elf_Internal_Verdaux *src, 106 Elf_External_Verdaux *dst) 107{ 108 H_PUT_32 (abfd, src->vda_name, dst->vda_name); 109 H_PUT_32 (abfd, src->vda_next, dst->vda_next); 110} 111 112/* Swap in a Verneed structure. */ 113 114void 115_bfd_elf_swap_verneed_in (bfd *abfd, 116 const Elf_External_Verneed *src, 117 Elf_Internal_Verneed *dst) 118{ 119 dst->vn_version = H_GET_16 (abfd, src->vn_version); 120 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt); 121 dst->vn_file = H_GET_32 (abfd, src->vn_file); 122 dst->vn_aux = H_GET_32 (abfd, src->vn_aux); 123 dst->vn_next = H_GET_32 (abfd, src->vn_next); 124} 125 126/* Swap out a Verneed structure. */ 127 128void 129_bfd_elf_swap_verneed_out (bfd *abfd, 130 const Elf_Internal_Verneed *src, 131 Elf_External_Verneed *dst) 132{ 133 H_PUT_16 (abfd, src->vn_version, dst->vn_version); 134 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt); 135 H_PUT_32 (abfd, src->vn_file, dst->vn_file); 136 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux); 137 H_PUT_32 (abfd, src->vn_next, dst->vn_next); 138} 139 140/* Swap in a Vernaux structure. */ 141 142void 143_bfd_elf_swap_vernaux_in (bfd *abfd, 144 const Elf_External_Vernaux *src, 145 Elf_Internal_Vernaux *dst) 146{ 147 dst->vna_hash = H_GET_32 (abfd, src->vna_hash); 148 dst->vna_flags = H_GET_16 (abfd, src->vna_flags); 149 dst->vna_other = H_GET_16 (abfd, src->vna_other); 150 dst->vna_name = H_GET_32 (abfd, src->vna_name); 151 dst->vna_next = H_GET_32 (abfd, src->vna_next); 152} 153 154/* Swap out a Vernaux structure. */ 155 156void 157_bfd_elf_swap_vernaux_out (bfd *abfd, 158 const Elf_Internal_Vernaux *src, 159 Elf_External_Vernaux *dst) 160{ 161 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash); 162 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags); 163 H_PUT_16 (abfd, src->vna_other, dst->vna_other); 164 H_PUT_32 (abfd, src->vna_name, dst->vna_name); 165 H_PUT_32 (abfd, src->vna_next, dst->vna_next); 166} 167 168/* Swap in a Versym structure. */ 169 170void 171_bfd_elf_swap_versym_in (bfd *abfd, 172 const Elf_External_Versym *src, 173 Elf_Internal_Versym *dst) 174{ 175 dst->vs_vers = H_GET_16 (abfd, src->vs_vers); 176} 177 178/* Swap out a Versym structure. */ 179 180void 181_bfd_elf_swap_versym_out (bfd *abfd, 182 const Elf_Internal_Versym *src, 183 Elf_External_Versym *dst) 184{ 185 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers); 186} 187 188/* Standard ELF hash function. Do not change this function; you will 189 cause invalid hash tables to be generated. */ 190 191unsigned long 192bfd_elf_hash (const char *namearg) 193{ 194 const unsigned char *name = (const unsigned char *) namearg; 195 unsigned long h = 0; 196 unsigned long g; 197 int ch; 198 199 while ((ch = *name++) != '\0') 200 { 201 h = (h << 4) + ch; 202 if ((g = (h & 0xf0000000)) != 0) 203 { 204 h ^= g >> 24; 205 /* The ELF ABI says `h &= ~g', but this is equivalent in 206 this case and on some machines one insn instead of two. */ 207 h ^= g; 208 } 209 } 210 return h & 0xffffffff; 211} 212 213/* Read a specified number of bytes at a specified offset in an ELF 214 file, into a newly allocated buffer, and return a pointer to the 215 buffer. */ 216 217static char * 218elf_read (bfd *abfd, file_ptr offset, bfd_size_type size) 219{ 220 char *buf; 221 222 if ((buf = bfd_alloc (abfd, size)) == NULL) 223 return NULL; 224 if (bfd_seek (abfd, offset, SEEK_SET) != 0) 225 return NULL; 226 if (bfd_bread (buf, size, abfd) != size) 227 { 228 if (bfd_get_error () != bfd_error_system_call) 229 bfd_set_error (bfd_error_file_truncated); 230 return NULL; 231 } 232 return buf; 233} 234 235bfd_boolean 236bfd_elf_mkobject (bfd *abfd) 237{ 238 /* This just does initialization. */ 239 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */ 240 elf_tdata (abfd) = bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); 241 if (elf_tdata (abfd) == 0) 242 return FALSE; 243 /* Since everything is done at close time, do we need any 244 initialization? */ 245 246 return TRUE; 247} 248 249bfd_boolean 250bfd_elf_mkcorefile (bfd *abfd) 251{ 252 /* I think this can be done just like an object file. */ 253 return bfd_elf_mkobject (abfd); 254} 255 256char * 257bfd_elf_get_str_section (bfd *abfd, unsigned int shindex) 258{ 259 Elf_Internal_Shdr **i_shdrp; 260 char *shstrtab = NULL; 261 file_ptr offset; 262 bfd_size_type shstrtabsize; 263 264 i_shdrp = elf_elfsections (abfd); 265 if (i_shdrp == 0 || i_shdrp[shindex] == 0) 266 return 0; 267 268 shstrtab = (char *) i_shdrp[shindex]->contents; 269 if (shstrtab == NULL) 270 { 271 /* No cached one, attempt to read, and cache what we read. */ 272 offset = i_shdrp[shindex]->sh_offset; 273 shstrtabsize = i_shdrp[shindex]->sh_size; 274 shstrtab = elf_read (abfd, offset, shstrtabsize); 275 i_shdrp[shindex]->contents = shstrtab; 276 } 277 return shstrtab; 278} 279 280char * 281bfd_elf_string_from_elf_section (bfd *abfd, 282 unsigned int shindex, 283 unsigned int strindex) 284{ 285 Elf_Internal_Shdr *hdr; 286 287 if (strindex == 0) 288 return ""; 289 290 hdr = elf_elfsections (abfd)[shindex]; 291 292 if (hdr->contents == NULL 293 && bfd_elf_get_str_section (abfd, shindex) == NULL) 294 return NULL; 295 296 if (strindex >= hdr->sh_size) 297 { 298 (*_bfd_error_handler) 299 (_("%s: invalid string offset %u >= %lu for section `%s'"), 300 bfd_archive_filename (abfd), strindex, (unsigned long) hdr->sh_size, 301 ((shindex == elf_elfheader(abfd)->e_shstrndx 302 && strindex == hdr->sh_name) 303 ? ".shstrtab" 304 : elf_string_from_elf_strtab (abfd, hdr->sh_name))); 305 return ""; 306 } 307 308 return ((char *) hdr->contents) + strindex; 309} 310 311/* Read and convert symbols to internal format. 312 SYMCOUNT specifies the number of symbols to read, starting from 313 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF 314 are non-NULL, they are used to store the internal symbols, external 315 symbols, and symbol section index extensions, respectively. */ 316 317Elf_Internal_Sym * 318bfd_elf_get_elf_syms (bfd *ibfd, 319 Elf_Internal_Shdr *symtab_hdr, 320 size_t symcount, 321 size_t symoffset, 322 Elf_Internal_Sym *intsym_buf, 323 void *extsym_buf, 324 Elf_External_Sym_Shndx *extshndx_buf) 325{ 326 Elf_Internal_Shdr *shndx_hdr; 327 void *alloc_ext; 328 const bfd_byte *esym; 329 Elf_External_Sym_Shndx *alloc_extshndx; 330 Elf_External_Sym_Shndx *shndx; 331 Elf_Internal_Sym *isym; 332 Elf_Internal_Sym *isymend; 333 const struct elf_backend_data *bed; 334 size_t extsym_size; 335 bfd_size_type amt; 336 file_ptr pos; 337 338 if (symcount == 0) 339 return intsym_buf; 340 341 /* Normal syms might have section extension entries. */ 342 shndx_hdr = NULL; 343 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr) 344 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr; 345 346 /* Read the symbols. */ 347 alloc_ext = NULL; 348 alloc_extshndx = NULL; 349 bed = get_elf_backend_data (ibfd); 350 extsym_size = bed->s->sizeof_sym; 351 amt = symcount * extsym_size; 352 pos = symtab_hdr->sh_offset + symoffset * extsym_size; 353 if (extsym_buf == NULL) 354 { 355 alloc_ext = bfd_malloc (amt); 356 extsym_buf = alloc_ext; 357 } 358 if (extsym_buf == NULL 359 || bfd_seek (ibfd, pos, SEEK_SET) != 0 360 || bfd_bread (extsym_buf, amt, ibfd) != amt) 361 { 362 intsym_buf = NULL; 363 goto out; 364 } 365 366 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0) 367 extshndx_buf = NULL; 368 else 369 { 370 amt = symcount * sizeof (Elf_External_Sym_Shndx); 371 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx); 372 if (extshndx_buf == NULL) 373 { 374 alloc_extshndx = bfd_malloc (amt); 375 extshndx_buf = alloc_extshndx; 376 } 377 if (extshndx_buf == NULL 378 || bfd_seek (ibfd, pos, SEEK_SET) != 0 379 || bfd_bread (extshndx_buf, amt, ibfd) != amt) 380 { 381 intsym_buf = NULL; 382 goto out; 383 } 384 } 385 386 if (intsym_buf == NULL) 387 { 388 bfd_size_type amt = symcount * sizeof (Elf_Internal_Sym); 389 intsym_buf = bfd_malloc (amt); 390 if (intsym_buf == NULL) 391 goto out; 392 } 393 394 /* Convert the symbols to internal form. */ 395 isymend = intsym_buf + symcount; 396 for (esym = extsym_buf, isym = intsym_buf, shndx = extshndx_buf; 397 isym < isymend; 398 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL) 399 (*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym); 400 401 out: 402 if (alloc_ext != NULL) 403 free (alloc_ext); 404 if (alloc_extshndx != NULL) 405 free (alloc_extshndx); 406 407 return intsym_buf; 408} 409 410/* Look up a symbol name. */ 411const char * 412bfd_elf_local_sym_name (bfd *abfd, Elf_Internal_Sym *isym) 413{ 414 unsigned int iname = isym->st_name; 415 unsigned int shindex = elf_tdata (abfd)->symtab_hdr.sh_link; 416 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION) 417 { 418 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name; 419 shindex = elf_elfheader (abfd)->e_shstrndx; 420 } 421 422 return bfd_elf_string_from_elf_section (abfd, shindex, iname); 423} 424 425/* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP 426 sections. The first element is the flags, the rest are section 427 pointers. */ 428 429typedef union elf_internal_group { 430 Elf_Internal_Shdr *shdr; 431 unsigned int flags; 432} Elf_Internal_Group; 433 434/* Return the name of the group signature symbol. Why isn't the 435 signature just a string? */ 436 437static const char * 438group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr) 439{ 440 Elf_Internal_Shdr *hdr; 441 unsigned char esym[sizeof (Elf64_External_Sym)]; 442 Elf_External_Sym_Shndx eshndx; 443 Elf_Internal_Sym isym; 444 445 /* First we need to ensure the symbol table is available. */ 446 if (! bfd_section_from_shdr (abfd, ghdr->sh_link)) 447 return NULL; 448 449 /* Go read the symbol. */ 450 hdr = &elf_tdata (abfd)->symtab_hdr; 451 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info, 452 &isym, esym, &eshndx) == NULL) 453 return NULL; 454 455 return bfd_elf_local_sym_name (abfd, &isym); 456} 457 458/* Set next_in_group list pointer, and group name for NEWSECT. */ 459 460static bfd_boolean 461setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect) 462{ 463 unsigned int num_group = elf_tdata (abfd)->num_group; 464 465 /* If num_group is zero, read in all SHT_GROUP sections. The count 466 is set to -1 if there are no SHT_GROUP sections. */ 467 if (num_group == 0) 468 { 469 unsigned int i, shnum; 470 471 /* First count the number of groups. If we have a SHT_GROUP 472 section with just a flag word (ie. sh_size is 4), ignore it. */ 473 shnum = elf_numsections (abfd); 474 num_group = 0; 475 for (i = 0; i < shnum; i++) 476 { 477 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i]; 478 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8) 479 num_group += 1; 480 } 481 482 if (num_group == 0) 483 num_group = (unsigned) -1; 484 elf_tdata (abfd)->num_group = num_group; 485 486 if (num_group > 0) 487 { 488 /* We keep a list of elf section headers for group sections, 489 so we can find them quickly. */ 490 bfd_size_type amt = num_group * sizeof (Elf_Internal_Shdr *); 491 elf_tdata (abfd)->group_sect_ptr = bfd_alloc (abfd, amt); 492 if (elf_tdata (abfd)->group_sect_ptr == NULL) 493 return FALSE; 494 495 num_group = 0; 496 for (i = 0; i < shnum; i++) 497 { 498 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i]; 499 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8) 500 { 501 unsigned char *src; 502 Elf_Internal_Group *dest; 503 504 /* Add to list of sections. */ 505 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr; 506 num_group += 1; 507 508 /* Read the raw contents. */ 509 BFD_ASSERT (sizeof (*dest) >= 4); 510 amt = shdr->sh_size * sizeof (*dest) / 4; 511 shdr->contents = bfd_alloc (abfd, amt); 512 if (shdr->contents == NULL 513 || bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0 514 || (bfd_bread (shdr->contents, shdr->sh_size, abfd) 515 != shdr->sh_size)) 516 return FALSE; 517 518 /* Translate raw contents, a flag word followed by an 519 array of elf section indices all in target byte order, 520 to the flag word followed by an array of elf section 521 pointers. */ 522 src = shdr->contents + shdr->sh_size; 523 dest = (Elf_Internal_Group *) (shdr->contents + amt); 524 while (1) 525 { 526 unsigned int idx; 527 528 src -= 4; 529 --dest; 530 idx = H_GET_32 (abfd, src); 531 if (src == shdr->contents) 532 { 533 dest->flags = idx; 534 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT)) 535 shdr->bfd_section->flags 536 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD; 537 break; 538 } 539 if (idx >= shnum) 540 { 541 ((*_bfd_error_handler) 542 (_("%s: invalid SHT_GROUP entry"), 543 bfd_archive_filename (abfd))); 544 idx = 0; 545 } 546 dest->shdr = elf_elfsections (abfd)[idx]; 547 } 548 } 549 } 550 } 551 } 552 553 if (num_group != (unsigned) -1) 554 { 555 unsigned int i; 556 557 for (i = 0; i < num_group; i++) 558 { 559 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i]; 560 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents; 561 unsigned int n_elt = shdr->sh_size / 4; 562 563 /* Look through this group's sections to see if current 564 section is a member. */ 565 while (--n_elt != 0) 566 if ((++idx)->shdr == hdr) 567 { 568 asection *s = NULL; 569 570 /* We are a member of this group. Go looking through 571 other members to see if any others are linked via 572 next_in_group. */ 573 idx = (Elf_Internal_Group *) shdr->contents; 574 n_elt = shdr->sh_size / 4; 575 while (--n_elt != 0) 576 if ((s = (++idx)->shdr->bfd_section) != NULL 577 && elf_next_in_group (s) != NULL) 578 break; 579 if (n_elt != 0) 580 { 581 /* Snarf the group name from other member, and 582 insert current section in circular list. */ 583 elf_group_name (newsect) = elf_group_name (s); 584 elf_next_in_group (newsect) = elf_next_in_group (s); 585 elf_next_in_group (s) = newsect; 586 } 587 else 588 { 589 const char *gname; 590 591 gname = group_signature (abfd, shdr); 592 if (gname == NULL) 593 return FALSE; 594 elf_group_name (newsect) = gname; 595 596 /* Start a circular list with one element. */ 597 elf_next_in_group (newsect) = newsect; 598 } 599 600 /* If the group section has been created, point to the 601 new member. */ 602 if (shdr->bfd_section != NULL) 603 elf_next_in_group (shdr->bfd_section) = newsect; 604 605 i = num_group - 1; 606 break; 607 } 608 } 609 } 610 611 if (elf_group_name (newsect) == NULL) 612 { 613 (*_bfd_error_handler) (_("%s: no group info for section %s"), 614 bfd_archive_filename (abfd), newsect->name); 615 } 616 return TRUE; 617} 618 619bfd_boolean 620bfd_elf_discard_group (bfd *abfd ATTRIBUTE_UNUSED, asection *group) 621{ 622 asection *first = elf_next_in_group (group); 623 asection *s = first; 624 625 while (s != NULL) 626 { 627 s->output_section = bfd_abs_section_ptr; 628 s = elf_next_in_group (s); 629 /* These lists are circular. */ 630 if (s == first) 631 break; 632 } 633 return TRUE; 634} 635 636/* Make a BFD section from an ELF section. We store a pointer to the 637 BFD section in the bfd_section field of the header. */ 638 639bfd_boolean 640_bfd_elf_make_section_from_shdr (bfd *abfd, 641 Elf_Internal_Shdr *hdr, 642 const char *name) 643{ 644 asection *newsect; 645 flagword flags; 646 const struct elf_backend_data *bed; 647 648 if (hdr->bfd_section != NULL) 649 { 650 BFD_ASSERT (strcmp (name, 651 bfd_get_section_name (abfd, hdr->bfd_section)) == 0); 652 return TRUE; 653 } 654 655 newsect = bfd_make_section_anyway (abfd, name); 656 if (newsect == NULL) 657 return FALSE; 658 659 /* Always use the real type/flags. */ 660 elf_section_type (newsect) = hdr->sh_type; 661 elf_section_flags (newsect) = hdr->sh_flags; 662 663 newsect->filepos = hdr->sh_offset; 664 665 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr) 666 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size) 667 || ! bfd_set_section_alignment (abfd, newsect, 668 bfd_log2 ((bfd_vma) hdr->sh_addralign))) 669 return FALSE; 670 671 flags = SEC_NO_FLAGS; 672 if (hdr->sh_type != SHT_NOBITS) 673 flags |= SEC_HAS_CONTENTS; 674 if (hdr->sh_type == SHT_GROUP) 675 flags |= SEC_GROUP | SEC_EXCLUDE; 676 if ((hdr->sh_flags & SHF_ALLOC) != 0) 677 { 678 flags |= SEC_ALLOC; 679 if (hdr->sh_type != SHT_NOBITS) 680 flags |= SEC_LOAD; 681 } 682 if ((hdr->sh_flags & SHF_WRITE) == 0) 683 flags |= SEC_READONLY; 684 if ((hdr->sh_flags & SHF_EXECINSTR) != 0) 685 flags |= SEC_CODE; 686 else if ((flags & SEC_LOAD) != 0) 687 flags |= SEC_DATA; 688 if ((hdr->sh_flags & SHF_MERGE) != 0) 689 { 690 flags |= SEC_MERGE; 691 newsect->entsize = hdr->sh_entsize; 692 if ((hdr->sh_flags & SHF_STRINGS) != 0) 693 flags |= SEC_STRINGS; 694 } 695 if (hdr->sh_flags & SHF_GROUP) 696 if (!setup_group (abfd, hdr, newsect)) 697 return FALSE; 698 if ((hdr->sh_flags & SHF_TLS) != 0) 699 flags |= SEC_THREAD_LOCAL; 700 701 /* The debugging sections appear to be recognized only by name, not 702 any sort of flag. */ 703 { 704 static const char *debug_sec_names [] = 705 { 706 ".debug", 707 ".gnu.linkonce.wi.", 708 ".line", 709 ".stab" 710 }; 711 int i; 712 713 for (i = ARRAY_SIZE (debug_sec_names); i--;) 714 if (strncmp (name, debug_sec_names[i], strlen (debug_sec_names[i])) == 0) 715 break; 716 717 if (i >= 0) 718 flags |= SEC_DEBUGGING; 719 } 720 721 /* As a GNU extension, if the name begins with .gnu.linkonce, we 722 only link a single copy of the section. This is used to support 723 g++. g++ will emit each template expansion in its own section. 724 The symbols will be defined as weak, so that multiple definitions 725 are permitted. The GNU linker extension is to actually discard 726 all but one of the sections. */ 727 if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0 728 && elf_next_in_group (newsect) == NULL) 729 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD; 730 731 bed = get_elf_backend_data (abfd); 732 if (bed->elf_backend_section_flags) 733 if (! bed->elf_backend_section_flags (&flags, hdr)) 734 return FALSE; 735 736 if (! bfd_set_section_flags (abfd, newsect, flags)) 737 return FALSE; 738 739 if ((flags & SEC_ALLOC) != 0) 740 { 741 Elf_Internal_Phdr *phdr; 742 unsigned int i; 743 744 /* Look through the phdrs to see if we need to adjust the lma. 745 If all the p_paddr fields are zero, we ignore them, since 746 some ELF linkers produce such output. */ 747 phdr = elf_tdata (abfd)->phdr; 748 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++) 749 { 750 if (phdr->p_paddr != 0) 751 break; 752 } 753 if (i < elf_elfheader (abfd)->e_phnum) 754 { 755 phdr = elf_tdata (abfd)->phdr; 756 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++) 757 { 758 /* This section is part of this segment if its file 759 offset plus size lies within the segment's memory 760 span and, if the section is loaded, the extent of the 761 loaded data lies within the extent of the segment. 762 763 Note - we used to check the p_paddr field as well, and 764 refuse to set the LMA if it was 0. This is wrong 765 though, as a perfectly valid initialised segment can 766 have a p_paddr of zero. Some architectures, eg ARM, 767 place special significance on the address 0 and 768 executables need to be able to have a segment which 769 covers this address. */ 770 if (phdr->p_type == PT_LOAD 771 && (bfd_vma) hdr->sh_offset >= phdr->p_offset 772 && (hdr->sh_offset + hdr->sh_size 773 <= phdr->p_offset + phdr->p_memsz) 774 && ((flags & SEC_LOAD) == 0 775 || (hdr->sh_offset + hdr->sh_size 776 <= phdr->p_offset + phdr->p_filesz))) 777 { 778 if ((flags & SEC_LOAD) == 0) 779 newsect->lma = (phdr->p_paddr 780 + hdr->sh_addr - phdr->p_vaddr); 781 else 782 /* We used to use the same adjustment for SEC_LOAD 783 sections, but that doesn't work if the segment 784 is packed with code from multiple VMAs. 785 Instead we calculate the section LMA based on 786 the segment LMA. It is assumed that the 787 segment will contain sections with contiguous 788 LMAs, even if the VMAs are not. */ 789 newsect->lma = (phdr->p_paddr 790 + hdr->sh_offset - phdr->p_offset); 791 792 /* With contiguous segments, we can't tell from file 793 offsets whether a section with zero size should 794 be placed at the end of one segment or the 795 beginning of the next. Decide based on vaddr. */ 796 if (hdr->sh_addr >= phdr->p_vaddr 797 && (hdr->sh_addr + hdr->sh_size 798 <= phdr->p_vaddr + phdr->p_memsz)) 799 break; 800 } 801 } 802 } 803 } 804 805 hdr->bfd_section = newsect; 806 elf_section_data (newsect)->this_hdr = *hdr; 807 808 return TRUE; 809} 810 811/* 812INTERNAL_FUNCTION 813 bfd_elf_find_section 814 815SYNOPSIS 816 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name); 817 818DESCRIPTION 819 Helper functions for GDB to locate the string tables. 820 Since BFD hides string tables from callers, GDB needs to use an 821 internal hook to find them. Sun's .stabstr, in particular, 822 isn't even pointed to by the .stab section, so ordinary 823 mechanisms wouldn't work to find it, even if we had some. 824*/ 825 826struct elf_internal_shdr * 827bfd_elf_find_section (bfd *abfd, char *name) 828{ 829 Elf_Internal_Shdr **i_shdrp; 830 char *shstrtab; 831 unsigned int max; 832 unsigned int i; 833 834 i_shdrp = elf_elfsections (abfd); 835 if (i_shdrp != NULL) 836 { 837 shstrtab = bfd_elf_get_str_section (abfd, 838 elf_elfheader (abfd)->e_shstrndx); 839 if (shstrtab != NULL) 840 { 841 max = elf_numsections (abfd); 842 for (i = 1; i < max; i++) 843 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name)) 844 return i_shdrp[i]; 845 } 846 } 847 return 0; 848} 849 850const char *const bfd_elf_section_type_names[] = { 851 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB", 852 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE", 853 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM", 854}; 855 856/* ELF relocs are against symbols. If we are producing relocatable 857 output, and the reloc is against an external symbol, and nothing 858 has given us any additional addend, the resulting reloc will also 859 be against the same symbol. In such a case, we don't want to 860 change anything about the way the reloc is handled, since it will 861 all be done at final link time. Rather than put special case code 862 into bfd_perform_relocation, all the reloc types use this howto 863 function. It just short circuits the reloc if producing 864 relocatable output against an external symbol. */ 865 866bfd_reloc_status_type 867bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED, 868 arelent *reloc_entry, 869 asymbol *symbol, 870 void *data ATTRIBUTE_UNUSED, 871 asection *input_section, 872 bfd *output_bfd, 873 char **error_message ATTRIBUTE_UNUSED) 874{ 875 if (output_bfd != NULL 876 && (symbol->flags & BSF_SECTION_SYM) == 0 877 && (! reloc_entry->howto->partial_inplace 878 || reloc_entry->addend == 0)) 879 { 880 reloc_entry->address += input_section->output_offset; 881 return bfd_reloc_ok; 882 } 883 884 return bfd_reloc_continue; 885} 886 887/* Make sure sec_info_type is cleared if sec_info is cleared too. */ 888 889static void 890merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED, 891 asection *sec) 892{ 893 BFD_ASSERT (sec->sec_info_type == ELF_INFO_TYPE_MERGE); 894 sec->sec_info_type = ELF_INFO_TYPE_NONE; 895} 896 897/* Finish SHF_MERGE section merging. */ 898 899bfd_boolean 900_bfd_elf_merge_sections (bfd *abfd, struct bfd_link_info *info) 901{ 902 if (!is_elf_hash_table (info->hash)) 903 return FALSE; 904 if (elf_hash_table (info)->merge_info) 905 _bfd_merge_sections (abfd, elf_hash_table (info)->merge_info, 906 merge_sections_remove_hook); 907 return TRUE; 908} 909 910void 911_bfd_elf_link_just_syms (asection *sec, struct bfd_link_info *info) 912{ 913 sec->output_section = bfd_abs_section_ptr; 914 sec->output_offset = sec->vma; 915 if (!is_elf_hash_table (info->hash)) 916 return; 917 918 sec->sec_info_type = ELF_INFO_TYPE_JUST_SYMS; 919} 920 921/* Copy the program header and other data from one object module to 922 another. */ 923 924bfd_boolean 925_bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) 926{ 927 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 928 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 929 return TRUE; 930 931 BFD_ASSERT (!elf_flags_init (obfd) 932 || (elf_elfheader (obfd)->e_flags 933 == elf_elfheader (ibfd)->e_flags)); 934 935 elf_gp (obfd) = elf_gp (ibfd); 936 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; 937 elf_flags_init (obfd) = TRUE; 938 return TRUE; 939} 940 941/* Print out the program headers. */ 942 943bfd_boolean 944_bfd_elf_print_private_bfd_data (bfd *abfd, void *farg) 945{ 946 FILE *f = farg; 947 Elf_Internal_Phdr *p; 948 asection *s; 949 bfd_byte *dynbuf = NULL; 950 951 p = elf_tdata (abfd)->phdr; 952 if (p != NULL) 953 { 954 unsigned int i, c; 955 956 fprintf (f, _("\nProgram Header:\n")); 957 c = elf_elfheader (abfd)->e_phnum; 958 for (i = 0; i < c; i++, p++) 959 { 960 const char *pt; 961 char buf[20]; 962 963 switch (p->p_type) 964 { 965 case PT_NULL: pt = "NULL"; break; 966 case PT_LOAD: pt = "LOAD"; break; 967 case PT_DYNAMIC: pt = "DYNAMIC"; break; 968 case PT_INTERP: pt = "INTERP"; break; 969 case PT_NOTE: pt = "NOTE"; break; 970 case PT_SHLIB: pt = "SHLIB"; break; 971 case PT_PHDR: pt = "PHDR"; break; 972 case PT_TLS: pt = "TLS"; break; 973 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break; 974 case PT_GNU_STACK: pt = "STACK"; break; 975 default: sprintf (buf, "0x%lx", p->p_type); pt = buf; break; 976 } 977 fprintf (f, "%8s off 0x", pt); 978 bfd_fprintf_vma (abfd, f, p->p_offset); 979 fprintf (f, " vaddr 0x"); 980 bfd_fprintf_vma (abfd, f, p->p_vaddr); 981 fprintf (f, " paddr 0x"); 982 bfd_fprintf_vma (abfd, f, p->p_paddr); 983 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align)); 984 fprintf (f, " filesz 0x"); 985 bfd_fprintf_vma (abfd, f, p->p_filesz); 986 fprintf (f, " memsz 0x"); 987 bfd_fprintf_vma (abfd, f, p->p_memsz); 988 fprintf (f, " flags %c%c%c", 989 (p->p_flags & PF_R) != 0 ? 'r' : '-', 990 (p->p_flags & PF_W) != 0 ? 'w' : '-', 991 (p->p_flags & PF_X) != 0 ? 'x' : '-'); 992 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0) 993 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)); 994 fprintf (f, "\n"); 995 } 996 } 997 998 s = bfd_get_section_by_name (abfd, ".dynamic"); 999 if (s != NULL) 1000 { 1001 int elfsec; 1002 unsigned long shlink; 1003 bfd_byte *extdyn, *extdynend; 1004 size_t extdynsize; 1005 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); 1006 1007 fprintf (f, _("\nDynamic Section:\n")); 1008 1009 dynbuf = bfd_malloc (s->_raw_size); 1010 if (dynbuf == NULL) 1011 goto error_return; 1012 if (! bfd_get_section_contents (abfd, s, dynbuf, 0, s->_raw_size)) 1013 goto error_return; 1014 1015 elfsec = _bfd_elf_section_from_bfd_section (abfd, s); 1016 if (elfsec == -1) 1017 goto error_return; 1018 shlink = elf_elfsections (abfd)[elfsec]->sh_link; 1019 1020 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; 1021 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; 1022 1023 extdyn = dynbuf; 1024 extdynend = extdyn + s->_raw_size; 1025 for (; extdyn < extdynend; extdyn += extdynsize) 1026 { 1027 Elf_Internal_Dyn dyn; 1028 const char *name; 1029 char ab[20]; 1030 bfd_boolean stringp; 1031 1032 (*swap_dyn_in) (abfd, extdyn, &dyn); 1033 1034 if (dyn.d_tag == DT_NULL) 1035 break; 1036 1037 stringp = FALSE; 1038 switch (dyn.d_tag) 1039 { 1040 default: 1041 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag); 1042 name = ab; 1043 break; 1044 1045 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break; 1046 case DT_PLTRELSZ: name = "PLTRELSZ"; break; 1047 case DT_PLTGOT: name = "PLTGOT"; break; 1048 case DT_HASH: name = "HASH"; break; 1049 case DT_STRTAB: name = "STRTAB"; break; 1050 case DT_SYMTAB: name = "SYMTAB"; break; 1051 case DT_RELA: name = "RELA"; break; 1052 case DT_RELASZ: name = "RELASZ"; break; 1053 case DT_RELAENT: name = "RELAENT"; break; 1054 case DT_STRSZ: name = "STRSZ"; break; 1055 case DT_SYMENT: name = "SYMENT"; break; 1056 case DT_INIT: name = "INIT"; break; 1057 case DT_FINI: name = "FINI"; break; 1058 case DT_SONAME: name = "SONAME"; stringp = TRUE; break; 1059 case DT_RPATH: name = "RPATH"; stringp = TRUE; break; 1060 case DT_SYMBOLIC: name = "SYMBOLIC"; break; 1061 case DT_REL: name = "REL"; break; 1062 case DT_RELSZ: name = "RELSZ"; break; 1063 case DT_RELENT: name = "RELENT"; break; 1064 case DT_PLTREL: name = "PLTREL"; break; 1065 case DT_DEBUG: name = "DEBUG"; break; 1066 case DT_TEXTREL: name = "TEXTREL"; break; 1067 case DT_JMPREL: name = "JMPREL"; break; 1068 case DT_BIND_NOW: name = "BIND_NOW"; break; 1069 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break; 1070 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break; 1071 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break; 1072 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break; 1073 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break; 1074 case DT_FLAGS: name = "FLAGS"; break; 1075 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break; 1076 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break; 1077 case DT_CHECKSUM: name = "CHECKSUM"; break; 1078 case DT_PLTPADSZ: name = "PLTPADSZ"; break; 1079 case DT_MOVEENT: name = "MOVEENT"; break; 1080 case DT_MOVESZ: name = "MOVESZ"; break; 1081 case DT_FEATURE: name = "FEATURE"; break; 1082 case DT_POSFLAG_1: name = "POSFLAG_1"; break; 1083 case DT_SYMINSZ: name = "SYMINSZ"; break; 1084 case DT_SYMINENT: name = "SYMINENT"; break; 1085 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break; 1086 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break; 1087 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break; 1088 case DT_PLTPAD: name = "PLTPAD"; break; 1089 case DT_MOVETAB: name = "MOVETAB"; break; 1090 case DT_SYMINFO: name = "SYMINFO"; break; 1091 case DT_RELACOUNT: name = "RELACOUNT"; break; 1092 case DT_RELCOUNT: name = "RELCOUNT"; break; 1093 case DT_FLAGS_1: name = "FLAGS_1"; break; 1094 case DT_VERSYM: name = "VERSYM"; break; 1095 case DT_VERDEF: name = "VERDEF"; break; 1096 case DT_VERDEFNUM: name = "VERDEFNUM"; break; 1097 case DT_VERNEED: name = "VERNEED"; break; 1098 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break; 1099 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break; 1100 case DT_USED: name = "USED"; break; 1101 case DT_FILTER: name = "FILTER"; stringp = TRUE; break; 1102 } 1103 1104 fprintf (f, " %-11s ", name); 1105 if (! stringp) 1106 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val); 1107 else 1108 { 1109 const char *string; 1110 unsigned int tagv = dyn.d_un.d_val; 1111 1112 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv); 1113 if (string == NULL) 1114 goto error_return; 1115 fprintf (f, "%s", string); 1116 } 1117 fprintf (f, "\n"); 1118 } 1119 1120 free (dynbuf); 1121 dynbuf = NULL; 1122 } 1123 1124 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL) 1125 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL)) 1126 { 1127 if (! _bfd_elf_slurp_version_tables (abfd)) 1128 return FALSE; 1129 } 1130 1131 if (elf_dynverdef (abfd) != 0) 1132 { 1133 Elf_Internal_Verdef *t; 1134 1135 fprintf (f, _("\nVersion definitions:\n")); 1136 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef) 1137 { 1138 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx, 1139 t->vd_flags, t->vd_hash, t->vd_nodename); 1140 if (t->vd_auxptr->vda_nextptr != NULL) 1141 { 1142 Elf_Internal_Verdaux *a; 1143 1144 fprintf (f, "\t"); 1145 for (a = t->vd_auxptr->vda_nextptr; 1146 a != NULL; 1147 a = a->vda_nextptr) 1148 fprintf (f, "%s ", a->vda_nodename); 1149 fprintf (f, "\n"); 1150 } 1151 } 1152 } 1153 1154 if (elf_dynverref (abfd) != 0) 1155 { 1156 Elf_Internal_Verneed *t; 1157 1158 fprintf (f, _("\nVersion References:\n")); 1159 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref) 1160 { 1161 Elf_Internal_Vernaux *a; 1162 1163 fprintf (f, _(" required from %s:\n"), t->vn_filename); 1164 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) 1165 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash, 1166 a->vna_flags, a->vna_other, a->vna_nodename); 1167 } 1168 } 1169 1170 return TRUE; 1171 1172 error_return: 1173 if (dynbuf != NULL) 1174 free (dynbuf); 1175 return FALSE; 1176} 1177 1178/* Display ELF-specific fields of a symbol. */ 1179 1180void 1181bfd_elf_print_symbol (bfd *abfd, 1182 void *filep, 1183 asymbol *symbol, 1184 bfd_print_symbol_type how) 1185{ 1186 FILE *file = filep; 1187 switch (how) 1188 { 1189 case bfd_print_symbol_name: 1190 fprintf (file, "%s", symbol->name); 1191 break; 1192 case bfd_print_symbol_more: 1193 fprintf (file, "elf "); 1194 bfd_fprintf_vma (abfd, file, symbol->value); 1195 fprintf (file, " %lx", (long) symbol->flags); 1196 break; 1197 case bfd_print_symbol_all: 1198 { 1199 const char *section_name; 1200 const char *name = NULL; 1201 const struct elf_backend_data *bed; 1202 unsigned char st_other; 1203 bfd_vma val; 1204 1205 section_name = symbol->section ? symbol->section->name : "(*none*)"; 1206 1207 bed = get_elf_backend_data (abfd); 1208 if (bed->elf_backend_print_symbol_all) 1209 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol); 1210 1211 if (name == NULL) 1212 { 1213 name = symbol->name; 1214 bfd_print_symbol_vandf (abfd, file, symbol); 1215 } 1216 1217 fprintf (file, " %s\t", section_name); 1218 /* Print the "other" value for a symbol. For common symbols, 1219 we've already printed the size; now print the alignment. 1220 For other symbols, we have no specified alignment, and 1221 we've printed the address; now print the size. */ 1222 if (bfd_is_com_section (symbol->section)) 1223 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value; 1224 else 1225 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size; 1226 bfd_fprintf_vma (abfd, file, val); 1227 1228 /* If we have version information, print it. */ 1229 if (elf_tdata (abfd)->dynversym_section != 0 1230 && (elf_tdata (abfd)->dynverdef_section != 0 1231 || elf_tdata (abfd)->dynverref_section != 0)) 1232 { 1233 unsigned int vernum; 1234 const char *version_string; 1235 1236 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION; 1237 1238 if (vernum == 0) 1239 version_string = ""; 1240 else if (vernum == 1) 1241 version_string = "Base"; 1242 else if (vernum <= elf_tdata (abfd)->cverdefs) 1243 version_string = 1244 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; 1245 else 1246 { 1247 Elf_Internal_Verneed *t; 1248 1249 version_string = ""; 1250 for (t = elf_tdata (abfd)->verref; 1251 t != NULL; 1252 t = t->vn_nextref) 1253 { 1254 Elf_Internal_Vernaux *a; 1255 1256 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) 1257 { 1258 if (a->vna_other == vernum) 1259 { 1260 version_string = a->vna_nodename; 1261 break; 1262 } 1263 } 1264 } 1265 } 1266 1267 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0) 1268 fprintf (file, " %-11s", version_string); 1269 else 1270 { 1271 int i; 1272 1273 fprintf (file, " (%s)", version_string); 1274 for (i = 10 - strlen (version_string); i > 0; --i) 1275 putc (' ', file); 1276 } 1277 } 1278 1279 /* If the st_other field is not zero, print it. */ 1280 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other; 1281 1282 switch (st_other) 1283 { 1284 case 0: break; 1285 case STV_INTERNAL: fprintf (file, " .internal"); break; 1286 case STV_HIDDEN: fprintf (file, " .hidden"); break; 1287 case STV_PROTECTED: fprintf (file, " .protected"); break; 1288 default: 1289 /* Some other non-defined flags are also present, so print 1290 everything hex. */ 1291 fprintf (file, " 0x%02x", (unsigned int) st_other); 1292 } 1293 1294 fprintf (file, " %s", name); 1295 } 1296 break; 1297 } 1298} 1299 1300/* Create an entry in an ELF linker hash table. */ 1301 1302struct bfd_hash_entry * 1303_bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry, 1304 struct bfd_hash_table *table, 1305 const char *string) 1306{ 1307 /* Allocate the structure if it has not already been allocated by a 1308 subclass. */ 1309 if (entry == NULL) 1310 { 1311 entry = bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry)); 1312 if (entry == NULL) 1313 return entry; 1314 } 1315 1316 /* Call the allocation method of the superclass. */ 1317 entry = _bfd_link_hash_newfunc (entry, table, string); 1318 if (entry != NULL) 1319 { 1320 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry; 1321 struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table; 1322 1323 /* Set local fields. */ 1324 ret->indx = -1; 1325 ret->dynindx = -1; 1326 ret->dynstr_index = 0; 1327 ret->elf_hash_value = 0; 1328 ret->weakdef = NULL; 1329 ret->verinfo.verdef = NULL; 1330 ret->vtable_entries_size = 0; 1331 ret->vtable_entries_used = NULL; 1332 ret->vtable_parent = NULL; 1333 ret->got = htab->init_refcount; 1334 ret->plt = htab->init_refcount; 1335 ret->size = 0; 1336 ret->type = STT_NOTYPE; 1337 ret->other = 0; 1338 /* Assume that we have been called by a non-ELF symbol reader. 1339 This flag is then reset by the code which reads an ELF input 1340 file. This ensures that a symbol created by a non-ELF symbol 1341 reader will have the flag set correctly. */ 1342 ret->elf_link_hash_flags = ELF_LINK_NON_ELF; 1343 } 1344 1345 return entry; 1346} 1347 1348/* Copy data from an indirect symbol to its direct symbol, hiding the 1349 old indirect symbol. Also used for copying flags to a weakdef. */ 1350 1351void 1352_bfd_elf_link_hash_copy_indirect (const struct elf_backend_data *bed, 1353 struct elf_link_hash_entry *dir, 1354 struct elf_link_hash_entry *ind) 1355{ 1356 bfd_signed_vma tmp; 1357 bfd_signed_vma lowest_valid = bed->can_refcount; 1358 1359 /* Copy down any references that we may have already seen to the 1360 symbol which just became indirect. */ 1361 1362 dir->elf_link_hash_flags 1363 |= ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC 1364 | ELF_LINK_HASH_REF_REGULAR 1365 | ELF_LINK_HASH_REF_REGULAR_NONWEAK 1366 | ELF_LINK_NON_GOT_REF 1367 | ELF_LINK_HASH_NEEDS_PLT 1368 | ELF_LINK_POINTER_EQUALITY_NEEDED); 1369 1370 if (ind->root.type != bfd_link_hash_indirect) 1371 return; 1372 1373 /* Copy over the global and procedure linkage table refcount entries. 1374 These may have been already set up by a check_relocs routine. */ 1375 tmp = dir->got.refcount; 1376 if (tmp < lowest_valid) 1377 { 1378 dir->got.refcount = ind->got.refcount; 1379 ind->got.refcount = tmp; 1380 } 1381 else 1382 BFD_ASSERT (ind->got.refcount < lowest_valid); 1383 1384 tmp = dir->plt.refcount; 1385 if (tmp < lowest_valid) 1386 { 1387 dir->plt.refcount = ind->plt.refcount; 1388 ind->plt.refcount = tmp; 1389 } 1390 else 1391 BFD_ASSERT (ind->plt.refcount < lowest_valid); 1392 1393 if (dir->dynindx == -1) 1394 { 1395 dir->dynindx = ind->dynindx; 1396 dir->dynstr_index = ind->dynstr_index; 1397 ind->dynindx = -1; 1398 ind->dynstr_index = 0; 1399 } 1400 else 1401 BFD_ASSERT (ind->dynindx == -1); 1402} 1403 1404void 1405_bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info, 1406 struct elf_link_hash_entry *h, 1407 bfd_boolean force_local) 1408{ 1409 h->plt = elf_hash_table (info)->init_offset; 1410 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; 1411 if (force_local) 1412 { 1413 h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL; 1414 if (h->dynindx != -1) 1415 { 1416 h->dynindx = -1; 1417 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 1418 h->dynstr_index); 1419 } 1420 } 1421} 1422 1423/* Initialize an ELF linker hash table. */ 1424 1425bfd_boolean 1426_bfd_elf_link_hash_table_init 1427 (struct elf_link_hash_table *table, 1428 bfd *abfd, 1429 struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *, 1430 struct bfd_hash_table *, 1431 const char *)) 1432{ 1433 bfd_boolean ret; 1434 1435 table->dynamic_sections_created = FALSE; 1436 table->dynobj = NULL; 1437 /* Make sure can_refcount is extended to the width and signedness of 1438 init_refcount before we subtract one from it. */ 1439 table->init_refcount.refcount = get_elf_backend_data (abfd)->can_refcount; 1440 table->init_refcount.refcount -= 1; 1441 table->init_offset.offset = -(bfd_vma) 1; 1442 /* The first dynamic symbol is a dummy. */ 1443 table->dynsymcount = 1; 1444 table->dynstr = NULL; 1445 table->bucketcount = 0; 1446 table->needed = NULL; 1447 table->hgot = NULL; 1448 table->stab_info = NULL; 1449 table->merge_info = NULL; 1450 memset (&table->eh_info, 0, sizeof (table->eh_info)); 1451 table->dynlocal = NULL; 1452 table->runpath = NULL; 1453 table->tls_sec = NULL; 1454 table->tls_size = 0; 1455 table->loaded = NULL; 1456 1457 ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc); 1458 table->root.type = bfd_link_elf_hash_table; 1459 1460 return ret; 1461} 1462 1463/* Create an ELF linker hash table. */ 1464 1465struct bfd_link_hash_table * 1466_bfd_elf_link_hash_table_create (bfd *abfd) 1467{ 1468 struct elf_link_hash_table *ret; 1469 bfd_size_type amt = sizeof (struct elf_link_hash_table); 1470 1471 ret = bfd_malloc (amt); 1472 if (ret == NULL) 1473 return NULL; 1474 1475 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc)) 1476 { 1477 free (ret); 1478 return NULL; 1479 } 1480 1481 return &ret->root; 1482} 1483 1484/* This is a hook for the ELF emulation code in the generic linker to 1485 tell the backend linker what file name to use for the DT_NEEDED 1486 entry for a dynamic object. */ 1487 1488void 1489bfd_elf_set_dt_needed_name (bfd *abfd, const char *name) 1490{ 1491 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour 1492 && bfd_get_format (abfd) == bfd_object) 1493 elf_dt_name (abfd) = name; 1494} 1495 1496void 1497bfd_elf_set_dyn_lib_class (bfd *abfd, int lib_class) 1498{ 1499 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour 1500 && bfd_get_format (abfd) == bfd_object) 1501 elf_dyn_lib_class (abfd) = lib_class; 1502} 1503 1504/* Get the list of DT_NEEDED entries for a link. This is a hook for 1505 the linker ELF emulation code. */ 1506 1507struct bfd_link_needed_list * 1508bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED, 1509 struct bfd_link_info *info) 1510{ 1511 if (! is_elf_hash_table (info->hash)) 1512 return NULL; 1513 return elf_hash_table (info)->needed; 1514} 1515 1516/* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a 1517 hook for the linker ELF emulation code. */ 1518 1519struct bfd_link_needed_list * 1520bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED, 1521 struct bfd_link_info *info) 1522{ 1523 if (! is_elf_hash_table (info->hash)) 1524 return NULL; 1525 return elf_hash_table (info)->runpath; 1526} 1527 1528/* Get the name actually used for a dynamic object for a link. This 1529 is the SONAME entry if there is one. Otherwise, it is the string 1530 passed to bfd_elf_set_dt_needed_name, or it is the filename. */ 1531 1532const char * 1533bfd_elf_get_dt_soname (bfd *abfd) 1534{ 1535 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour 1536 && bfd_get_format (abfd) == bfd_object) 1537 return elf_dt_name (abfd); 1538 return NULL; 1539} 1540 1541/* Get the list of DT_NEEDED entries from a BFD. This is a hook for 1542 the ELF linker emulation code. */ 1543 1544bfd_boolean 1545bfd_elf_get_bfd_needed_list (bfd *abfd, 1546 struct bfd_link_needed_list **pneeded) 1547{ 1548 asection *s; 1549 bfd_byte *dynbuf = NULL; 1550 int elfsec; 1551 unsigned long shlink; 1552 bfd_byte *extdyn, *extdynend; 1553 size_t extdynsize; 1554 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); 1555 1556 *pneeded = NULL; 1557 1558 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour 1559 || bfd_get_format (abfd) != bfd_object) 1560 return TRUE; 1561 1562 s = bfd_get_section_by_name (abfd, ".dynamic"); 1563 if (s == NULL || s->_raw_size == 0) 1564 return TRUE; 1565 1566 dynbuf = bfd_malloc (s->_raw_size); 1567 if (dynbuf == NULL) 1568 goto error_return; 1569 1570 if (! bfd_get_section_contents (abfd, s, dynbuf, 0, s->_raw_size)) 1571 goto error_return; 1572 1573 elfsec = _bfd_elf_section_from_bfd_section (abfd, s); 1574 if (elfsec == -1) 1575 goto error_return; 1576 1577 shlink = elf_elfsections (abfd)[elfsec]->sh_link; 1578 1579 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; 1580 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; 1581 1582 extdyn = dynbuf; 1583 extdynend = extdyn + s->_raw_size; 1584 for (; extdyn < extdynend; extdyn += extdynsize) 1585 { 1586 Elf_Internal_Dyn dyn; 1587 1588 (*swap_dyn_in) (abfd, extdyn, &dyn); 1589 1590 if (dyn.d_tag == DT_NULL) 1591 break; 1592 1593 if (dyn.d_tag == DT_NEEDED) 1594 { 1595 const char *string; 1596 struct bfd_link_needed_list *l; 1597 unsigned int tagv = dyn.d_un.d_val; 1598 bfd_size_type amt; 1599 1600 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv); 1601 if (string == NULL) 1602 goto error_return; 1603 1604 amt = sizeof *l; 1605 l = bfd_alloc (abfd, amt); 1606 if (l == NULL) 1607 goto error_return; 1608 1609 l->by = abfd; 1610 l->name = string; 1611 l->next = *pneeded; 1612 *pneeded = l; 1613 } 1614 } 1615 1616 free (dynbuf); 1617 1618 return TRUE; 1619 1620 error_return: 1621 if (dynbuf != NULL) 1622 free (dynbuf); 1623 return FALSE; 1624} 1625 1626/* Allocate an ELF string table--force the first byte to be zero. */ 1627 1628struct bfd_strtab_hash * 1629_bfd_elf_stringtab_init (void) 1630{ 1631 struct bfd_strtab_hash *ret; 1632 1633 ret = _bfd_stringtab_init (); 1634 if (ret != NULL) 1635 { 1636 bfd_size_type loc; 1637 1638 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE); 1639 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1); 1640 if (loc == (bfd_size_type) -1) 1641 { 1642 _bfd_stringtab_free (ret); 1643 ret = NULL; 1644 } 1645 } 1646 return ret; 1647} 1648 1649/* ELF .o/exec file reading */ 1650 1651/* Create a new bfd section from an ELF section header. */ 1652 1653bfd_boolean 1654bfd_section_from_shdr (bfd *abfd, unsigned int shindex) 1655{ 1656 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex]; 1657 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd); 1658 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 1659 const char *name; 1660 1661 name = elf_string_from_elf_strtab (abfd, hdr->sh_name); 1662 1663 switch (hdr->sh_type) 1664 { 1665 case SHT_NULL: 1666 /* Inactive section. Throw it away. */ 1667 return TRUE; 1668 1669 case SHT_PROGBITS: /* Normal section with contents. */ 1670 case SHT_NOBITS: /* .bss section. */ 1671 case SHT_HASH: /* .hash section. */ 1672 case SHT_NOTE: /* .note section. */ 1673 case SHT_INIT_ARRAY: /* .init_array section. */ 1674 case SHT_FINI_ARRAY: /* .fini_array section. */ 1675 case SHT_PREINIT_ARRAY: /* .preinit_array section. */ 1676 return _bfd_elf_make_section_from_shdr (abfd, hdr, name); 1677 1678 case SHT_DYNAMIC: /* Dynamic linking information. */ 1679 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) 1680 return FALSE; 1681 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB) 1682 { 1683 Elf_Internal_Shdr *dynsymhdr; 1684 1685 /* The shared libraries distributed with hpux11 have a bogus 1686 sh_link field for the ".dynamic" section. Find the 1687 string table for the ".dynsym" section instead. */ 1688 if (elf_dynsymtab (abfd) != 0) 1689 { 1690 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)]; 1691 hdr->sh_link = dynsymhdr->sh_link; 1692 } 1693 else 1694 { 1695 unsigned int i, num_sec; 1696 1697 num_sec = elf_numsections (abfd); 1698 for (i = 1; i < num_sec; i++) 1699 { 1700 dynsymhdr = elf_elfsections (abfd)[i]; 1701 if (dynsymhdr->sh_type == SHT_DYNSYM) 1702 { 1703 hdr->sh_link = dynsymhdr->sh_link; 1704 break; 1705 } 1706 } 1707 } 1708 } 1709 break; 1710 1711 case SHT_SYMTAB: /* A symbol table */ 1712 if (elf_onesymtab (abfd) == shindex) 1713 return TRUE; 1714 1715 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym); 1716 BFD_ASSERT (elf_onesymtab (abfd) == 0); 1717 elf_onesymtab (abfd) = shindex; 1718 elf_tdata (abfd)->symtab_hdr = *hdr; 1719 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr; 1720 abfd->flags |= HAS_SYMS; 1721 1722 /* Sometimes a shared object will map in the symbol table. If 1723 SHF_ALLOC is set, and this is a shared object, then we also 1724 treat this section as a BFD section. We can not base the 1725 decision purely on SHF_ALLOC, because that flag is sometimes 1726 set in a relocatable object file, which would confuse the 1727 linker. */ 1728 if ((hdr->sh_flags & SHF_ALLOC) != 0 1729 && (abfd->flags & DYNAMIC) != 0 1730 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) 1731 return FALSE; 1732 1733 return TRUE; 1734 1735 case SHT_DYNSYM: /* A dynamic symbol table */ 1736 if (elf_dynsymtab (abfd) == shindex) 1737 return TRUE; 1738 1739 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym); 1740 BFD_ASSERT (elf_dynsymtab (abfd) == 0); 1741 elf_dynsymtab (abfd) = shindex; 1742 elf_tdata (abfd)->dynsymtab_hdr = *hdr; 1743 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr; 1744 abfd->flags |= HAS_SYMS; 1745 1746 /* Besides being a symbol table, we also treat this as a regular 1747 section, so that objcopy can handle it. */ 1748 return _bfd_elf_make_section_from_shdr (abfd, hdr, name); 1749 1750 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */ 1751 if (elf_symtab_shndx (abfd) == shindex) 1752 return TRUE; 1753 1754 /* Get the associated symbol table. */ 1755 if (! bfd_section_from_shdr (abfd, hdr->sh_link) 1756 || hdr->sh_link != elf_onesymtab (abfd)) 1757 return FALSE; 1758 1759 elf_symtab_shndx (abfd) = shindex; 1760 elf_tdata (abfd)->symtab_shndx_hdr = *hdr; 1761 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr; 1762 return TRUE; 1763 1764 case SHT_STRTAB: /* A string table */ 1765 if (hdr->bfd_section != NULL) 1766 return TRUE; 1767 if (ehdr->e_shstrndx == shindex) 1768 { 1769 elf_tdata (abfd)->shstrtab_hdr = *hdr; 1770 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr; 1771 return TRUE; 1772 } 1773 { 1774 unsigned int i, num_sec; 1775 1776 num_sec = elf_numsections (abfd); 1777 for (i = 1; i < num_sec; i++) 1778 { 1779 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i]; 1780 if (hdr2->sh_link == shindex) 1781 { 1782 if (! bfd_section_from_shdr (abfd, i)) 1783 return FALSE; 1784 if (elf_onesymtab (abfd) == i) 1785 { 1786 elf_tdata (abfd)->strtab_hdr = *hdr; 1787 elf_elfsections (abfd)[shindex] = 1788 &elf_tdata (abfd)->strtab_hdr; 1789 return TRUE; 1790 } 1791 if (elf_dynsymtab (abfd) == i) 1792 { 1793 elf_tdata (abfd)->dynstrtab_hdr = *hdr; 1794 elf_elfsections (abfd)[shindex] = hdr = 1795 &elf_tdata (abfd)->dynstrtab_hdr; 1796 /* We also treat this as a regular section, so 1797 that objcopy can handle it. */ 1798 break; 1799 } 1800#if 0 /* Not handling other string tables specially right now. */ 1801 hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */ 1802 /* We have a strtab for some random other section. */ 1803 newsect = (asection *) hdr2->bfd_section; 1804 if (!newsect) 1805 break; 1806 hdr->bfd_section = newsect; 1807 hdr2 = &elf_section_data (newsect)->str_hdr; 1808 *hdr2 = *hdr; 1809 elf_elfsections (abfd)[shindex] = hdr2; 1810#endif 1811 } 1812 } 1813 } 1814 1815 return _bfd_elf_make_section_from_shdr (abfd, hdr, name); 1816 1817 case SHT_REL: 1818 case SHT_RELA: 1819 /* *These* do a lot of work -- but build no sections! */ 1820 { 1821 asection *target_sect; 1822 Elf_Internal_Shdr *hdr2; 1823 unsigned int num_sec = elf_numsections (abfd); 1824 1825 /* Check for a bogus link to avoid crashing. */ 1826 if ((hdr->sh_link >= SHN_LORESERVE && hdr->sh_link <= SHN_HIRESERVE) 1827 || hdr->sh_link >= num_sec) 1828 { 1829 ((*_bfd_error_handler) 1830 (_("%s: invalid link %lu for reloc section %s (index %u)"), 1831 bfd_archive_filename (abfd), hdr->sh_link, name, shindex)); 1832 return _bfd_elf_make_section_from_shdr (abfd, hdr, name); 1833 } 1834 1835 /* For some incomprehensible reason Oracle distributes 1836 libraries for Solaris in which some of the objects have 1837 bogus sh_link fields. It would be nice if we could just 1838 reject them, but, unfortunately, some people need to use 1839 them. We scan through the section headers; if we find only 1840 one suitable symbol table, we clobber the sh_link to point 1841 to it. I hope this doesn't break anything. */ 1842 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB 1843 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM) 1844 { 1845 unsigned int scan; 1846 int found; 1847 1848 found = 0; 1849 for (scan = 1; scan < num_sec; scan++) 1850 { 1851 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB 1852 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM) 1853 { 1854 if (found != 0) 1855 { 1856 found = 0; 1857 break; 1858 } 1859 found = scan; 1860 } 1861 } 1862 if (found != 0) 1863 hdr->sh_link = found; 1864 } 1865 1866 /* Get the symbol table. */ 1867 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB 1868 && ! bfd_section_from_shdr (abfd, hdr->sh_link)) 1869 return FALSE; 1870 1871 /* If this reloc section does not use the main symbol table we 1872 don't treat it as a reloc section. BFD can't adequately 1873 represent such a section, so at least for now, we don't 1874 try. We just present it as a normal section. We also 1875 can't use it as a reloc section if it points to the null 1876 section. */ 1877 if (hdr->sh_link != elf_onesymtab (abfd) || hdr->sh_info == SHN_UNDEF) 1878 return _bfd_elf_make_section_from_shdr (abfd, hdr, name); 1879 1880 if (! bfd_section_from_shdr (abfd, hdr->sh_info)) 1881 return FALSE; 1882 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info); 1883 if (target_sect == NULL) 1884 return FALSE; 1885 1886 if ((target_sect->flags & SEC_RELOC) == 0 1887 || target_sect->reloc_count == 0) 1888 hdr2 = &elf_section_data (target_sect)->rel_hdr; 1889 else 1890 { 1891 bfd_size_type amt; 1892 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL); 1893 amt = sizeof (*hdr2); 1894 hdr2 = bfd_alloc (abfd, amt); 1895 elf_section_data (target_sect)->rel_hdr2 = hdr2; 1896 } 1897 *hdr2 = *hdr; 1898 elf_elfsections (abfd)[shindex] = hdr2; 1899 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr); 1900 target_sect->flags |= SEC_RELOC; 1901 target_sect->relocation = NULL; 1902 target_sect->rel_filepos = hdr->sh_offset; 1903 /* In the section to which the relocations apply, mark whether 1904 its relocations are of the REL or RELA variety. */ 1905 if (hdr->sh_size != 0) 1906 target_sect->use_rela_p = hdr->sh_type == SHT_RELA; 1907 abfd->flags |= HAS_RELOC; 1908 return TRUE; 1909 } 1910 break; 1911 1912 case SHT_GNU_verdef: 1913 elf_dynverdef (abfd) = shindex; 1914 elf_tdata (abfd)->dynverdef_hdr = *hdr; 1915 return _bfd_elf_make_section_from_shdr (abfd, hdr, name); 1916 break; 1917 1918 case SHT_GNU_versym: 1919 elf_dynversym (abfd) = shindex; 1920 elf_tdata (abfd)->dynversym_hdr = *hdr; 1921 return _bfd_elf_make_section_from_shdr (abfd, hdr, name); 1922 break; 1923 1924 case SHT_GNU_verneed: 1925 elf_dynverref (abfd) = shindex; 1926 elf_tdata (abfd)->dynverref_hdr = *hdr; 1927 return _bfd_elf_make_section_from_shdr (abfd, hdr, name); 1928 break; 1929 1930 case SHT_SHLIB: 1931 return TRUE; 1932 1933 case SHT_GROUP: 1934 /* We need a BFD section for objcopy and relocatable linking, 1935 and it's handy to have the signature available as the section 1936 name. */ 1937 name = group_signature (abfd, hdr); 1938 if (name == NULL) 1939 return FALSE; 1940 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name)) 1941 return FALSE; 1942 if (hdr->contents != NULL) 1943 { 1944 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents; 1945 unsigned int n_elt = hdr->sh_size / 4; 1946 asection *s; 1947 1948 if (idx->flags & GRP_COMDAT) 1949 hdr->bfd_section->flags 1950 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD; 1951 1952 while (--n_elt != 0) 1953 if ((s = (++idx)->shdr->bfd_section) != NULL 1954 && elf_next_in_group (s) != NULL) 1955 { 1956 elf_next_in_group (hdr->bfd_section) = s; 1957 break; 1958 } 1959 } 1960 break; 1961 1962 default: 1963 /* Check for any processor-specific section types. */ 1964 { 1965 if (bed->elf_backend_section_from_shdr) 1966 (*bed->elf_backend_section_from_shdr) (abfd, hdr, name); 1967 } 1968 break; 1969 } 1970 1971 return TRUE; 1972} 1973 1974/* Return the section for the local symbol specified by ABFD, R_SYMNDX. 1975 Return SEC for sections that have no elf section, and NULL on error. */ 1976 1977asection * 1978bfd_section_from_r_symndx (bfd *abfd, 1979 struct sym_sec_cache *cache, 1980 asection *sec, 1981 unsigned long r_symndx) 1982{ 1983 Elf_Internal_Shdr *symtab_hdr; 1984 unsigned char esym[sizeof (Elf64_External_Sym)]; 1985 Elf_External_Sym_Shndx eshndx; 1986 Elf_Internal_Sym isym; 1987 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE; 1988 1989 if (cache->abfd == abfd && cache->indx[ent] == r_symndx) 1990 return cache->sec[ent]; 1991 1992 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1993 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx, 1994 &isym, esym, &eshndx) == NULL) 1995 return NULL; 1996 1997 if (cache->abfd != abfd) 1998 { 1999 memset (cache->indx, -1, sizeof (cache->indx)); 2000 cache->abfd = abfd; 2001 } 2002 cache->indx[ent] = r_symndx; 2003 cache->sec[ent] = sec; 2004 if ((isym.st_shndx != SHN_UNDEF && isym.st_shndx < SHN_LORESERVE) 2005 || isym.st_shndx > SHN_HIRESERVE) 2006 { 2007 asection *s; 2008 s = bfd_section_from_elf_index (abfd, isym.st_shndx); 2009 if (s != NULL) 2010 cache->sec[ent] = s; 2011 } 2012 return cache->sec[ent]; 2013} 2014 2015/* Given an ELF section number, retrieve the corresponding BFD 2016 section. */ 2017 2018asection * 2019bfd_section_from_elf_index (bfd *abfd, unsigned int index) 2020{ 2021 if (index >= elf_numsections (abfd)) 2022 return NULL; 2023 return elf_elfsections (abfd)[index]->bfd_section; 2024} 2025 2026static struct bfd_elf_special_section const special_sections[] = 2027{ 2028 { ".bss", 4, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 2029 { ".comment", 8, 0, SHT_PROGBITS, 0 }, 2030 { ".data", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 2031 { ".data1", 6, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 2032 { ".debug", 6, 0, SHT_PROGBITS, 0 }, 2033 { ".fini", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, 2034 { ".init", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, 2035 { ".line", 5, 0, SHT_PROGBITS, 0 }, 2036 { ".rodata", 7, -2, SHT_PROGBITS, SHF_ALLOC }, 2037 { ".rodata1", 8, 0, SHT_PROGBITS, SHF_ALLOC }, 2038 { ".tbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS }, 2039 { ".tdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS }, 2040 { ".text", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, 2041 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE }, 2042 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE }, 2043 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE }, 2044 { ".debug_line", 11, 0, SHT_PROGBITS, 0 }, 2045 { ".debug_info", 11, 0, SHT_PROGBITS, 0 }, 2046 { ".debug_abbrev", 13, 0, SHT_PROGBITS, 0 }, 2047 { ".debug_aranges", 14, 0, SHT_PROGBITS, 0 }, 2048 { ".dynamic", 8, 0, SHT_DYNAMIC, SHF_ALLOC }, 2049 { ".dynstr", 7, 0, SHT_STRTAB, SHF_ALLOC }, 2050 { ".dynsym", 7, 0, SHT_DYNSYM, SHF_ALLOC }, 2051 { ".got", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 2052 { ".hash", 5, 0, SHT_HASH, SHF_ALLOC }, 2053 { ".interp", 7, 0, SHT_PROGBITS, 0 }, 2054 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, 2055 { ".shstrtab", 9, 0, SHT_STRTAB, 0 }, 2056 { ".strtab", 7, 0, SHT_STRTAB, 0 }, 2057 { ".symtab", 7, 0, SHT_SYMTAB, 0 }, 2058 { ".gnu.version", 12, 0, SHT_GNU_versym, 0 }, 2059 { ".gnu.version_d", 14, 0, SHT_GNU_verdef, 0 }, 2060 { ".gnu.version_r", 14, 0, SHT_GNU_verneed, 0 }, 2061 { ".note", 5, -1, SHT_NOTE, 0 }, 2062 { ".rela", 5, -1, SHT_RELA, 0 }, 2063 { ".rel", 4, -1, SHT_REL, 0 }, 2064 { ".stabstr", 5, 3, SHT_STRTAB, 0 }, 2065 { NULL, 0, 0, 0, 0 } 2066}; 2067 2068static const struct bfd_elf_special_section * 2069get_special_section (const char *name, 2070 const struct bfd_elf_special_section *special_sections, 2071 unsigned int rela) 2072{ 2073 int i; 2074 int len = strlen (name); 2075 2076 for (i = 0; special_sections[i].prefix != NULL; i++) 2077 { 2078 int suffix_len; 2079 int prefix_len = special_sections[i].prefix_length; 2080 2081 if (len < prefix_len) 2082 continue; 2083 if (memcmp (name, special_sections[i].prefix, prefix_len) != 0) 2084 continue; 2085 2086 suffix_len = special_sections[i].suffix_length; 2087 if (suffix_len <= 0) 2088 { 2089 if (name[prefix_len] != 0) 2090 { 2091 if (suffix_len == 0) 2092 continue; 2093 if (name[prefix_len] != '.' 2094 && (suffix_len == -2 2095 || (rela && special_sections[i].type == SHT_REL))) 2096 continue; 2097 } 2098 } 2099 else 2100 { 2101 if (len < prefix_len + suffix_len) 2102 continue; 2103 if (memcmp (name + len - suffix_len, 2104 special_sections[i].prefix + prefix_len, 2105 suffix_len) != 0) 2106 continue; 2107 } 2108 return &special_sections[i]; 2109 } 2110 2111 return NULL; 2112} 2113 2114const struct bfd_elf_special_section * 2115_bfd_elf_get_sec_type_attr (bfd *abfd, const char *name) 2116{ 2117 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 2118 const struct bfd_elf_special_section *ssect = NULL; 2119 2120 /* See if this is one of the special sections. */ 2121 if (name) 2122 { 2123 unsigned int rela = bed->default_use_rela_p; 2124 2125 if (bed->special_sections) 2126 ssect = get_special_section (name, bed->special_sections, rela); 2127 2128 if (! ssect) 2129 ssect = get_special_section (name, special_sections, rela); 2130 } 2131 2132 return ssect; 2133} 2134 2135bfd_boolean 2136_bfd_elf_new_section_hook (bfd *abfd, asection *sec) 2137{ 2138 struct bfd_elf_section_data *sdata; 2139 const struct bfd_elf_special_section *ssect; 2140 2141 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd; 2142 if (sdata == NULL) 2143 { 2144 sdata = bfd_zalloc (abfd, sizeof (*sdata)); 2145 if (sdata == NULL) 2146 return FALSE; 2147 sec->used_by_bfd = sdata; 2148 } 2149 2150 elf_section_type (sec) = SHT_NULL; 2151 ssect = _bfd_elf_get_sec_type_attr (abfd, sec->name); 2152 if (ssect != NULL) 2153 { 2154 elf_section_type (sec) = ssect->type; 2155 elf_section_flags (sec) = ssect->attr; 2156 } 2157 2158 /* Indicate whether or not this section should use RELA relocations. */ 2159 sec->use_rela_p = get_elf_backend_data (abfd)->default_use_rela_p; 2160 2161 return TRUE; 2162} 2163 2164/* Create a new bfd section from an ELF program header. 2165 2166 Since program segments have no names, we generate a synthetic name 2167 of the form segment<NUM>, where NUM is generally the index in the 2168 program header table. For segments that are split (see below) we 2169 generate the names segment<NUM>a and segment<NUM>b. 2170 2171 Note that some program segments may have a file size that is different than 2172 (less than) the memory size. All this means is that at execution the 2173 system must allocate the amount of memory specified by the memory size, 2174 but only initialize it with the first "file size" bytes read from the 2175 file. This would occur for example, with program segments consisting 2176 of combined data+bss. 2177 2178 To handle the above situation, this routine generates TWO bfd sections 2179 for the single program segment. The first has the length specified by 2180 the file size of the segment, and the second has the length specified 2181 by the difference between the two sizes. In effect, the segment is split 2182 into it's initialized and uninitialized parts. 2183 2184 */ 2185 2186bfd_boolean 2187_bfd_elf_make_section_from_phdr (bfd *abfd, 2188 Elf_Internal_Phdr *hdr, 2189 int index, 2190 const char *typename) 2191{ 2192 asection *newsect; 2193 char *name; 2194 char namebuf[64]; 2195 size_t len; 2196 int split; 2197 2198 split = ((hdr->p_memsz > 0) 2199 && (hdr->p_filesz > 0) 2200 && (hdr->p_memsz > hdr->p_filesz)); 2201 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : ""); 2202 len = strlen (namebuf) + 1; 2203 name = bfd_alloc (abfd, len); 2204 if (!name) 2205 return FALSE; 2206 memcpy (name, namebuf, len); 2207 newsect = bfd_make_section (abfd, name); 2208 if (newsect == NULL) 2209 return FALSE; 2210 newsect->vma = hdr->p_vaddr; 2211 newsect->lma = hdr->p_paddr; 2212 newsect->_raw_size = hdr->p_filesz; 2213 newsect->filepos = hdr->p_offset; 2214 newsect->flags |= SEC_HAS_CONTENTS; 2215 newsect->alignment_power = bfd_log2 (hdr->p_align); 2216 if (hdr->p_type == PT_LOAD) 2217 { 2218 newsect->flags |= SEC_ALLOC; 2219 newsect->flags |= SEC_LOAD; 2220 if (hdr->p_flags & PF_X) 2221 { 2222 /* FIXME: all we known is that it has execute PERMISSION, 2223 may be data. */ 2224 newsect->flags |= SEC_CODE; 2225 } 2226 } 2227 if (!(hdr->p_flags & PF_W)) 2228 { 2229 newsect->flags |= SEC_READONLY; 2230 } 2231 2232 if (split) 2233 { 2234 sprintf (namebuf, "%s%db", typename, index); 2235 len = strlen (namebuf) + 1; 2236 name = bfd_alloc (abfd, len); 2237 if (!name) 2238 return FALSE; 2239 memcpy (name, namebuf, len); 2240 newsect = bfd_make_section (abfd, name); 2241 if (newsect == NULL) 2242 return FALSE; 2243 newsect->vma = hdr->p_vaddr + hdr->p_filesz; 2244 newsect->lma = hdr->p_paddr + hdr->p_filesz; 2245 newsect->_raw_size = hdr->p_memsz - hdr->p_filesz; 2246 if (hdr->p_type == PT_LOAD) 2247 { 2248 newsect->flags |= SEC_ALLOC; 2249 if (hdr->p_flags & PF_X) 2250 newsect->flags |= SEC_CODE; 2251 } 2252 if (!(hdr->p_flags & PF_W)) 2253 newsect->flags |= SEC_READONLY; 2254 } 2255 2256 return TRUE; 2257} 2258 2259bfd_boolean 2260bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int index) 2261{ 2262 const struct elf_backend_data *bed; 2263 2264 switch (hdr->p_type) 2265 { 2266 case PT_NULL: 2267 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null"); 2268 2269 case PT_LOAD: 2270 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load"); 2271 2272 case PT_DYNAMIC: 2273 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic"); 2274 2275 case PT_INTERP: 2276 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp"); 2277 2278 case PT_NOTE: 2279 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note")) 2280 return FALSE; 2281 if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz)) 2282 return FALSE; 2283 return TRUE; 2284 2285 case PT_SHLIB: 2286 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib"); 2287 2288 case PT_PHDR: 2289 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr"); 2290 2291 case PT_GNU_EH_FRAME: 2292 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, 2293 "eh_frame_hdr"); 2294 2295 case PT_GNU_STACK: 2296 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack"); 2297 2298 default: 2299 /* Check for any processor-specific program segment types. 2300 If no handler for them, default to making "segment" sections. */ 2301 bed = get_elf_backend_data (abfd); 2302 if (bed->elf_backend_section_from_phdr) 2303 return (*bed->elf_backend_section_from_phdr) (abfd, hdr, index); 2304 else 2305 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "segment"); 2306 } 2307} 2308 2309/* Initialize REL_HDR, the section-header for new section, containing 2310 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA 2311 relocations; otherwise, we use REL relocations. */ 2312 2313bfd_boolean 2314_bfd_elf_init_reloc_shdr (bfd *abfd, 2315 Elf_Internal_Shdr *rel_hdr, 2316 asection *asect, 2317 bfd_boolean use_rela_p) 2318{ 2319 char *name; 2320 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 2321 bfd_size_type amt = sizeof ".rela" + strlen (asect->name); 2322 2323 name = bfd_alloc (abfd, amt); 2324 if (name == NULL) 2325 return FALSE; 2326 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name); 2327 rel_hdr->sh_name = 2328 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name, 2329 FALSE); 2330 if (rel_hdr->sh_name == (unsigned int) -1) 2331 return FALSE; 2332 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL; 2333 rel_hdr->sh_entsize = (use_rela_p 2334 ? bed->s->sizeof_rela 2335 : bed->s->sizeof_rel); 2336 rel_hdr->sh_addralign = 1 << bed->s->log_file_align; 2337 rel_hdr->sh_flags = 0; 2338 rel_hdr->sh_addr = 0; 2339 rel_hdr->sh_size = 0; 2340 rel_hdr->sh_offset = 0; 2341 2342 return TRUE; 2343} 2344 2345/* Set up an ELF internal section header for a section. */ 2346 2347static void 2348elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg) 2349{ 2350 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 2351 bfd_boolean *failedptr = failedptrarg; 2352 Elf_Internal_Shdr *this_hdr; 2353 2354 if (*failedptr) 2355 { 2356 /* We already failed; just get out of the bfd_map_over_sections 2357 loop. */ 2358 return; 2359 } 2360 2361 this_hdr = &elf_section_data (asect)->this_hdr; 2362 2363 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), 2364 asect->name, FALSE); 2365 if (this_hdr->sh_name == (unsigned int) -1) 2366 { 2367 *failedptr = TRUE; 2368 return; 2369 } 2370 2371 this_hdr->sh_flags = 0; 2372 2373 if ((asect->flags & SEC_ALLOC) != 0 2374 || asect->user_set_vma) 2375 this_hdr->sh_addr = asect->vma; 2376 else 2377 this_hdr->sh_addr = 0; 2378 2379 this_hdr->sh_offset = 0; 2380 this_hdr->sh_size = asect->_raw_size; 2381 this_hdr->sh_link = 0; 2382 this_hdr->sh_addralign = 1 << asect->alignment_power; 2383 /* The sh_entsize and sh_info fields may have been set already by 2384 copy_private_section_data. */ 2385 2386 this_hdr->bfd_section = asect; 2387 this_hdr->contents = NULL; 2388 2389 /* If the section type is unspecified, we set it based on 2390 asect->flags. */ 2391 if (this_hdr->sh_type == SHT_NULL) 2392 { 2393 if ((asect->flags & SEC_ALLOC) != 0 2394 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0) 2395 || (asect->flags & SEC_NEVER_LOAD) != 0)) 2396 this_hdr->sh_type = SHT_NOBITS; 2397 else 2398 this_hdr->sh_type = SHT_PROGBITS; 2399 } 2400 2401 switch (this_hdr->sh_type) 2402 { 2403 default: 2404 break; 2405 2406 case SHT_STRTAB: 2407 case SHT_INIT_ARRAY: 2408 case SHT_FINI_ARRAY: 2409 case SHT_PREINIT_ARRAY: 2410 case SHT_NOTE: 2411 case SHT_NOBITS: 2412 case SHT_PROGBITS: 2413 break; 2414 2415 case SHT_HASH: 2416 this_hdr->sh_entsize = bed->s->sizeof_hash_entry; 2417 break; 2418 2419 case SHT_DYNSYM: 2420 this_hdr->sh_entsize = bed->s->sizeof_sym; 2421 break; 2422 2423 case SHT_DYNAMIC: 2424 this_hdr->sh_entsize = bed->s->sizeof_dyn; 2425 break; 2426 2427 case SHT_RELA: 2428 if (get_elf_backend_data (abfd)->may_use_rela_p) 2429 this_hdr->sh_entsize = bed->s->sizeof_rela; 2430 break; 2431 2432 case SHT_REL: 2433 if (get_elf_backend_data (abfd)->may_use_rel_p) 2434 this_hdr->sh_entsize = bed->s->sizeof_rel; 2435 break; 2436 2437 case SHT_GNU_versym: 2438 this_hdr->sh_entsize = sizeof (Elf_External_Versym); 2439 break; 2440 2441 case SHT_GNU_verdef: 2442 this_hdr->sh_entsize = 0; 2443 /* objcopy or strip will copy over sh_info, but may not set 2444 cverdefs. The linker will set cverdefs, but sh_info will be 2445 zero. */ 2446 if (this_hdr->sh_info == 0) 2447 this_hdr->sh_info = elf_tdata (abfd)->cverdefs; 2448 else 2449 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0 2450 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs); 2451 break; 2452 2453 case SHT_GNU_verneed: 2454 this_hdr->sh_entsize = 0; 2455 /* objcopy or strip will copy over sh_info, but may not set 2456 cverrefs. The linker will set cverrefs, but sh_info will be 2457 zero. */ 2458 if (this_hdr->sh_info == 0) 2459 this_hdr->sh_info = elf_tdata (abfd)->cverrefs; 2460 else 2461 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0 2462 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs); 2463 break; 2464 2465 case SHT_GROUP: 2466 this_hdr->sh_entsize = 4; 2467 break; 2468 } 2469 2470 if ((asect->flags & SEC_ALLOC) != 0) 2471 this_hdr->sh_flags |= SHF_ALLOC; 2472 if ((asect->flags & SEC_READONLY) == 0) 2473 this_hdr->sh_flags |= SHF_WRITE; 2474 if ((asect->flags & SEC_CODE) != 0) 2475 this_hdr->sh_flags |= SHF_EXECINSTR; 2476 if ((asect->flags & SEC_MERGE) != 0) 2477 { 2478 this_hdr->sh_flags |= SHF_MERGE; 2479 this_hdr->sh_entsize = asect->entsize; 2480 if ((asect->flags & SEC_STRINGS) != 0) 2481 this_hdr->sh_flags |= SHF_STRINGS; 2482 } 2483 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL) 2484 this_hdr->sh_flags |= SHF_GROUP; 2485 if ((asect->flags & SEC_THREAD_LOCAL) != 0) 2486 { 2487 this_hdr->sh_flags |= SHF_TLS; 2488 if (asect->_raw_size == 0 && (asect->flags & SEC_HAS_CONTENTS) == 0) 2489 { 2490 struct bfd_link_order *o; 2491 2492 this_hdr->sh_size = 0; 2493 for (o = asect->link_order_head; o != NULL; o = o->next) 2494 if (this_hdr->sh_size < o->offset + o->size) 2495 this_hdr->sh_size = o->offset + o->size; 2496 if (this_hdr->sh_size) 2497 this_hdr->sh_type = SHT_NOBITS; 2498 } 2499 } 2500 2501 /* Check for processor-specific section types. */ 2502 if (bed->elf_backend_fake_sections 2503 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect)) 2504 *failedptr = TRUE; 2505 2506 /* If the section has relocs, set up a section header for the 2507 SHT_REL[A] section. If two relocation sections are required for 2508 this section, it is up to the processor-specific back-end to 2509 create the other. */ 2510 if ((asect->flags & SEC_RELOC) != 0 2511 && !_bfd_elf_init_reloc_shdr (abfd, 2512 &elf_section_data (asect)->rel_hdr, 2513 asect, 2514 asect->use_rela_p)) 2515 *failedptr = TRUE; 2516} 2517 2518/* Fill in the contents of a SHT_GROUP section. */ 2519 2520void 2521bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg) 2522{ 2523 bfd_boolean *failedptr = failedptrarg; 2524 unsigned long symindx; 2525 asection *elt, *first; 2526 unsigned char *loc; 2527 struct bfd_link_order *l; 2528 bfd_boolean gas; 2529 2530 if (elf_section_data (sec)->this_hdr.sh_type != SHT_GROUP 2531 || *failedptr) 2532 return; 2533 2534 symindx = 0; 2535 if (elf_group_id (sec) != NULL) 2536 symindx = elf_group_id (sec)->udata.i; 2537 2538 if (symindx == 0) 2539 { 2540 /* If called from the assembler, swap_out_syms will have set up 2541 elf_section_syms; If called for "ld -r", use target_index. */ 2542 if (elf_section_syms (abfd) != NULL) 2543 symindx = elf_section_syms (abfd)[sec->index]->udata.i; 2544 else 2545 symindx = sec->target_index; 2546 } 2547 elf_section_data (sec)->this_hdr.sh_info = symindx; 2548 2549 /* The contents won't be allocated for "ld -r" or objcopy. */ 2550 gas = TRUE; 2551 if (sec->contents == NULL) 2552 { 2553 gas = FALSE; 2554 sec->contents = bfd_alloc (abfd, sec->_raw_size); 2555 2556 /* Arrange for the section to be written out. */ 2557 elf_section_data (sec)->this_hdr.contents = sec->contents; 2558 if (sec->contents == NULL) 2559 { 2560 *failedptr = TRUE; 2561 return; 2562 } 2563 } 2564 2565 loc = sec->contents + sec->_raw_size; 2566 2567 /* Get the pointer to the first section in the group that gas 2568 squirreled away here. objcopy arranges for this to be set to the 2569 start of the input section group. */ 2570 first = elt = elf_next_in_group (sec); 2571 2572 /* First element is a flag word. Rest of section is elf section 2573 indices for all the sections of the group. Write them backwards 2574 just to keep the group in the same order as given in .section 2575 directives, not that it matters. */ 2576 while (elt != NULL) 2577 { 2578 asection *s; 2579 unsigned int idx; 2580 2581 loc -= 4; 2582 s = elt; 2583 if (!gas) 2584 s = s->output_section; 2585 idx = 0; 2586 if (s != NULL) 2587 idx = elf_section_data (s)->this_idx; 2588 H_PUT_32 (abfd, idx, loc); 2589 elt = elf_next_in_group (elt); 2590 if (elt == first) 2591 break; 2592 } 2593 2594 /* If this is a relocatable link, then the above did nothing because 2595 SEC is the output section. Look through the input sections 2596 instead. */ 2597 for (l = sec->link_order_head; l != NULL; l = l->next) 2598 if (l->type == bfd_indirect_link_order 2599 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL) 2600 do 2601 { 2602 loc -= 4; 2603 H_PUT_32 (abfd, 2604 elf_section_data (elt->output_section)->this_idx, loc); 2605 elt = elf_next_in_group (elt); 2606 /* During a relocatable link, the lists are circular. */ 2607 } 2608 while (elt != elf_next_in_group (l->u.indirect.section)); 2609 2610 /* With ld -r, merging SHT_GROUP sections results in wasted space 2611 due to allowing for the flag word on each input. We may well 2612 duplicate entries too. */ 2613 while ((loc -= 4) > sec->contents) 2614 H_PUT_32 (abfd, 0, loc); 2615 2616 if (loc != sec->contents) 2617 abort (); 2618 2619 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc); 2620} 2621 2622/* Assign all ELF section numbers. The dummy first section is handled here 2623 too. The link/info pointers for the standard section types are filled 2624 in here too, while we're at it. */ 2625 2626static bfd_boolean 2627assign_section_numbers (bfd *abfd) 2628{ 2629 struct elf_obj_tdata *t = elf_tdata (abfd); 2630 asection *sec; 2631 unsigned int section_number, secn; 2632 Elf_Internal_Shdr **i_shdrp; 2633 bfd_size_type amt; 2634 2635 section_number = 1; 2636 2637 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd)); 2638 2639 for (sec = abfd->sections; sec; sec = sec->next) 2640 { 2641 struct bfd_elf_section_data *d = elf_section_data (sec); 2642 2643 if (section_number == SHN_LORESERVE) 2644 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE; 2645 d->this_idx = section_number++; 2646 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name); 2647 if ((sec->flags & SEC_RELOC) == 0) 2648 d->rel_idx = 0; 2649 else 2650 { 2651 if (section_number == SHN_LORESERVE) 2652 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE; 2653 d->rel_idx = section_number++; 2654 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name); 2655 } 2656 2657 if (d->rel_hdr2) 2658 { 2659 if (section_number == SHN_LORESERVE) 2660 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE; 2661 d->rel_idx2 = section_number++; 2662 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name); 2663 } 2664 else 2665 d->rel_idx2 = 0; 2666 } 2667 2668 if (section_number == SHN_LORESERVE) 2669 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE; 2670 t->shstrtab_section = section_number++; 2671 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name); 2672 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section; 2673 2674 if (bfd_get_symcount (abfd) > 0) 2675 { 2676 if (section_number == SHN_LORESERVE) 2677 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE; 2678 t->symtab_section = section_number++; 2679 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name); 2680 if (section_number > SHN_LORESERVE - 2) 2681 { 2682 if (section_number == SHN_LORESERVE) 2683 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE; 2684 t->symtab_shndx_section = section_number++; 2685 t->symtab_shndx_hdr.sh_name 2686 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), 2687 ".symtab_shndx", FALSE); 2688 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1) 2689 return FALSE; 2690 } 2691 if (section_number == SHN_LORESERVE) 2692 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE; 2693 t->strtab_section = section_number++; 2694 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name); 2695 } 2696 2697 _bfd_elf_strtab_finalize (elf_shstrtab (abfd)); 2698 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd)); 2699 2700 elf_numsections (abfd) = section_number; 2701 elf_elfheader (abfd)->e_shnum = section_number; 2702 if (section_number > SHN_LORESERVE) 2703 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE; 2704 2705 /* Set up the list of section header pointers, in agreement with the 2706 indices. */ 2707 amt = section_number * sizeof (Elf_Internal_Shdr *); 2708 i_shdrp = bfd_zalloc (abfd, amt); 2709 if (i_shdrp == NULL) 2710 return FALSE; 2711 2712 amt = sizeof (Elf_Internal_Shdr); 2713 i_shdrp[0] = bfd_zalloc (abfd, amt); 2714 if (i_shdrp[0] == NULL) 2715 { 2716 bfd_release (abfd, i_shdrp); 2717 return FALSE; 2718 } 2719 2720 elf_elfsections (abfd) = i_shdrp; 2721 2722 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr; 2723 if (bfd_get_symcount (abfd) > 0) 2724 { 2725 i_shdrp[t->symtab_section] = &t->symtab_hdr; 2726 if (elf_numsections (abfd) > SHN_LORESERVE) 2727 { 2728 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr; 2729 t->symtab_shndx_hdr.sh_link = t->symtab_section; 2730 } 2731 i_shdrp[t->strtab_section] = &t->strtab_hdr; 2732 t->symtab_hdr.sh_link = t->strtab_section; 2733 } 2734 for (sec = abfd->sections; sec; sec = sec->next) 2735 { 2736 struct bfd_elf_section_data *d = elf_section_data (sec); 2737 asection *s; 2738 const char *name; 2739 2740 i_shdrp[d->this_idx] = &d->this_hdr; 2741 if (d->rel_idx != 0) 2742 i_shdrp[d->rel_idx] = &d->rel_hdr; 2743 if (d->rel_idx2 != 0) 2744 i_shdrp[d->rel_idx2] = d->rel_hdr2; 2745 2746 /* Fill in the sh_link and sh_info fields while we're at it. */ 2747 2748 /* sh_link of a reloc section is the section index of the symbol 2749 table. sh_info is the section index of the section to which 2750 the relocation entries apply. */ 2751 if (d->rel_idx != 0) 2752 { 2753 d->rel_hdr.sh_link = t->symtab_section; 2754 d->rel_hdr.sh_info = d->this_idx; 2755 } 2756 if (d->rel_idx2 != 0) 2757 { 2758 d->rel_hdr2->sh_link = t->symtab_section; 2759 d->rel_hdr2->sh_info = d->this_idx; 2760 } 2761 2762 switch (d->this_hdr.sh_type) 2763 { 2764 case SHT_REL: 2765 case SHT_RELA: 2766 /* A reloc section which we are treating as a normal BFD 2767 section. sh_link is the section index of the symbol 2768 table. sh_info is the section index of the section to 2769 which the relocation entries apply. We assume that an 2770 allocated reloc section uses the dynamic symbol table. 2771 FIXME: How can we be sure? */ 2772 s = bfd_get_section_by_name (abfd, ".dynsym"); 2773 if (s != NULL) 2774 d->this_hdr.sh_link = elf_section_data (s)->this_idx; 2775 2776 /* We look up the section the relocs apply to by name. */ 2777 name = sec->name; 2778 if (d->this_hdr.sh_type == SHT_REL) 2779 name += 4; 2780 else 2781 name += 5; 2782 s = bfd_get_section_by_name (abfd, name); 2783 if (s != NULL) 2784 d->this_hdr.sh_info = elf_section_data (s)->this_idx; 2785 break; 2786 2787 case SHT_STRTAB: 2788 /* We assume that a section named .stab*str is a stabs 2789 string section. We look for a section with the same name 2790 but without the trailing ``str'', and set its sh_link 2791 field to point to this section. */ 2792 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0 2793 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0) 2794 { 2795 size_t len; 2796 char *alc; 2797 2798 len = strlen (sec->name); 2799 alc = bfd_malloc (len - 2); 2800 if (alc == NULL) 2801 return FALSE; 2802 memcpy (alc, sec->name, len - 3); 2803 alc[len - 3] = '\0'; 2804 s = bfd_get_section_by_name (abfd, alc); 2805 free (alc); 2806 if (s != NULL) 2807 { 2808 elf_section_data (s)->this_hdr.sh_link = d->this_idx; 2809 2810 /* This is a .stab section. */ 2811 if (elf_section_data (s)->this_hdr.sh_entsize == 0) 2812 elf_section_data (s)->this_hdr.sh_entsize 2813 = 4 + 2 * bfd_get_arch_size (abfd) / 8; 2814 } 2815 } 2816 break; 2817 2818 case SHT_DYNAMIC: 2819 case SHT_DYNSYM: 2820 case SHT_GNU_verneed: 2821 case SHT_GNU_verdef: 2822 /* sh_link is the section header index of the string table 2823 used for the dynamic entries, or the symbol table, or the 2824 version strings. */ 2825 s = bfd_get_section_by_name (abfd, ".dynstr"); 2826 if (s != NULL) 2827 d->this_hdr.sh_link = elf_section_data (s)->this_idx; 2828 break; 2829 2830 case SHT_HASH: 2831 case SHT_GNU_versym: 2832 /* sh_link is the section header index of the symbol table 2833 this hash table or version table is for. */ 2834 s = bfd_get_section_by_name (abfd, ".dynsym"); 2835 if (s != NULL) 2836 d->this_hdr.sh_link = elf_section_data (s)->this_idx; 2837 break; 2838 2839 case SHT_GROUP: 2840 d->this_hdr.sh_link = t->symtab_section; 2841 } 2842 } 2843 2844 for (secn = 1; secn < section_number; ++secn) 2845 if (i_shdrp[secn] == NULL) 2846 i_shdrp[secn] = i_shdrp[0]; 2847 else 2848 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd), 2849 i_shdrp[secn]->sh_name); 2850 return TRUE; 2851} 2852 2853/* Map symbol from it's internal number to the external number, moving 2854 all local symbols to be at the head of the list. */ 2855 2856static int 2857sym_is_global (bfd *abfd, asymbol *sym) 2858{ 2859 /* If the backend has a special mapping, use it. */ 2860 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 2861 if (bed->elf_backend_sym_is_global) 2862 return (*bed->elf_backend_sym_is_global) (abfd, sym); 2863 2864 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0 2865 || bfd_is_und_section (bfd_get_section (sym)) 2866 || bfd_is_com_section (bfd_get_section (sym))); 2867} 2868 2869static bfd_boolean 2870elf_map_symbols (bfd *abfd) 2871{ 2872 unsigned int symcount = bfd_get_symcount (abfd); 2873 asymbol **syms = bfd_get_outsymbols (abfd); 2874 asymbol **sect_syms; 2875 unsigned int num_locals = 0; 2876 unsigned int num_globals = 0; 2877 unsigned int num_locals2 = 0; 2878 unsigned int num_globals2 = 0; 2879 int max_index = 0; 2880 unsigned int idx; 2881 asection *asect; 2882 asymbol **new_syms; 2883 bfd_size_type amt; 2884 2885#ifdef DEBUG 2886 fprintf (stderr, "elf_map_symbols\n"); 2887 fflush (stderr); 2888#endif 2889 2890 for (asect = abfd->sections; asect; asect = asect->next) 2891 { 2892 if (max_index < asect->index) 2893 max_index = asect->index; 2894 } 2895 2896 max_index++; 2897 amt = max_index * sizeof (asymbol *); 2898 sect_syms = bfd_zalloc (abfd, amt); 2899 if (sect_syms == NULL) 2900 return FALSE; 2901 elf_section_syms (abfd) = sect_syms; 2902 elf_num_section_syms (abfd) = max_index; 2903 2904 /* Init sect_syms entries for any section symbols we have already 2905 decided to output. */ 2906 for (idx = 0; idx < symcount; idx++) 2907 { 2908 asymbol *sym = syms[idx]; 2909 2910 if ((sym->flags & BSF_SECTION_SYM) != 0 2911 && sym->value == 0) 2912 { 2913 asection *sec; 2914 2915 sec = sym->section; 2916 2917 if (sec->owner != NULL) 2918 { 2919 if (sec->owner != abfd) 2920 { 2921 if (sec->output_offset != 0) 2922 continue; 2923 2924 sec = sec->output_section; 2925 2926 /* Empty sections in the input files may have had a 2927 section symbol created for them. (See the comment 2928 near the end of _bfd_generic_link_output_symbols in 2929 linker.c). If the linker script discards such 2930 sections then we will reach this point. Since we know 2931 that we cannot avoid this case, we detect it and skip 2932 the abort and the assignment to the sect_syms array. 2933 To reproduce this particular case try running the 2934 linker testsuite test ld-scripts/weak.exp for an ELF 2935 port that uses the generic linker. */ 2936 if (sec->owner == NULL) 2937 continue; 2938 2939 BFD_ASSERT (sec->owner == abfd); 2940 } 2941 sect_syms[sec->index] = syms[idx]; 2942 } 2943 } 2944 } 2945 2946 /* Classify all of the symbols. */ 2947 for (idx = 0; idx < symcount; idx++) 2948 { 2949 if (!sym_is_global (abfd, syms[idx])) 2950 num_locals++; 2951 else 2952 num_globals++; 2953 } 2954 2955 /* We will be adding a section symbol for each BFD section. Most normal 2956 sections will already have a section symbol in outsymbols, but 2957 eg. SHT_GROUP sections will not, and we need the section symbol mapped 2958 at least in that case. */ 2959 for (asect = abfd->sections; asect; asect = asect->next) 2960 { 2961 if (sect_syms[asect->index] == NULL) 2962 { 2963 if (!sym_is_global (abfd, asect->symbol)) 2964 num_locals++; 2965 else 2966 num_globals++; 2967 } 2968 } 2969 2970 /* Now sort the symbols so the local symbols are first. */ 2971 amt = (num_locals + num_globals) * sizeof (asymbol *); 2972 new_syms = bfd_alloc (abfd, amt); 2973 2974 if (new_syms == NULL) 2975 return FALSE; 2976 2977 for (idx = 0; idx < symcount; idx++) 2978 { 2979 asymbol *sym = syms[idx]; 2980 unsigned int i; 2981 2982 if (!sym_is_global (abfd, sym)) 2983 i = num_locals2++; 2984 else 2985 i = num_locals + num_globals2++; 2986 new_syms[i] = sym; 2987 sym->udata.i = i + 1; 2988 } 2989 for (asect = abfd->sections; asect; asect = asect->next) 2990 { 2991 if (sect_syms[asect->index] == NULL) 2992 { 2993 asymbol *sym = asect->symbol; 2994 unsigned int i; 2995 2996 sect_syms[asect->index] = sym; 2997 if (!sym_is_global (abfd, sym)) 2998 i = num_locals2++; 2999 else 3000 i = num_locals + num_globals2++; 3001 new_syms[i] = sym; 3002 sym->udata.i = i + 1; 3003 } 3004 } 3005 3006 bfd_set_symtab (abfd, new_syms, num_locals + num_globals); 3007 3008 elf_num_locals (abfd) = num_locals; 3009 elf_num_globals (abfd) = num_globals; 3010 return TRUE; 3011} 3012 3013/* Align to the maximum file alignment that could be required for any 3014 ELF data structure. */ 3015 3016static inline file_ptr 3017align_file_position (file_ptr off, int align) 3018{ 3019 return (off + align - 1) & ~(align - 1); 3020} 3021 3022/* Assign a file position to a section, optionally aligning to the 3023 required section alignment. */ 3024 3025file_ptr 3026_bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp, 3027 file_ptr offset, 3028 bfd_boolean align) 3029{ 3030 if (align) 3031 { 3032 unsigned int al; 3033 3034 al = i_shdrp->sh_addralign; 3035 if (al > 1) 3036 offset = BFD_ALIGN (offset, al); 3037 } 3038 i_shdrp->sh_offset = offset; 3039 if (i_shdrp->bfd_section != NULL) 3040 i_shdrp->bfd_section->filepos = offset; 3041 if (i_shdrp->sh_type != SHT_NOBITS) 3042 offset += i_shdrp->sh_size; 3043 return offset; 3044} 3045 3046/* Compute the file positions we are going to put the sections at, and 3047 otherwise prepare to begin writing out the ELF file. If LINK_INFO 3048 is not NULL, this is being called by the ELF backend linker. */ 3049 3050bfd_boolean 3051_bfd_elf_compute_section_file_positions (bfd *abfd, 3052 struct bfd_link_info *link_info) 3053{ 3054 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 3055 bfd_boolean failed; 3056 struct bfd_strtab_hash *strtab; 3057 Elf_Internal_Shdr *shstrtab_hdr; 3058 3059 if (abfd->output_has_begun) 3060 return TRUE; 3061 3062 /* Do any elf backend specific processing first. */ 3063 if (bed->elf_backend_begin_write_processing) 3064 (*bed->elf_backend_begin_write_processing) (abfd, link_info); 3065 3066 if (! prep_headers (abfd)) 3067 return FALSE; 3068 3069 /* Post process the headers if necessary. */ 3070 if (bed->elf_backend_post_process_headers) 3071 (*bed->elf_backend_post_process_headers) (abfd, link_info); 3072 3073 failed = FALSE; 3074 bfd_map_over_sections (abfd, elf_fake_sections, &failed); 3075 if (failed) 3076 return FALSE; 3077 3078 if (!assign_section_numbers (abfd)) 3079 return FALSE; 3080 3081 /* The backend linker builds symbol table information itself. */ 3082 if (link_info == NULL && bfd_get_symcount (abfd) > 0) 3083 { 3084 /* Non-zero if doing a relocatable link. */ 3085 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC)); 3086 3087 if (! swap_out_syms (abfd, &strtab, relocatable_p)) 3088 return FALSE; 3089 } 3090 3091 if (link_info == NULL) 3092 { 3093 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed); 3094 if (failed) 3095 return FALSE; 3096 } 3097 3098 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr; 3099 /* sh_name was set in prep_headers. */ 3100 shstrtab_hdr->sh_type = SHT_STRTAB; 3101 shstrtab_hdr->sh_flags = 0; 3102 shstrtab_hdr->sh_addr = 0; 3103 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd)); 3104 shstrtab_hdr->sh_entsize = 0; 3105 shstrtab_hdr->sh_link = 0; 3106 shstrtab_hdr->sh_info = 0; 3107 /* sh_offset is set in assign_file_positions_except_relocs. */ 3108 shstrtab_hdr->sh_addralign = 1; 3109 3110 if (!assign_file_positions_except_relocs (abfd, link_info)) 3111 return FALSE; 3112 3113 if (link_info == NULL && bfd_get_symcount (abfd) > 0) 3114 { 3115 file_ptr off; 3116 Elf_Internal_Shdr *hdr; 3117 3118 off = elf_tdata (abfd)->next_file_pos; 3119 3120 hdr = &elf_tdata (abfd)->symtab_hdr; 3121 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE); 3122 3123 hdr = &elf_tdata (abfd)->symtab_shndx_hdr; 3124 if (hdr->sh_size != 0) 3125 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE); 3126 3127 hdr = &elf_tdata (abfd)->strtab_hdr; 3128 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE); 3129 3130 elf_tdata (abfd)->next_file_pos = off; 3131 3132 /* Now that we know where the .strtab section goes, write it 3133 out. */ 3134 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0 3135 || ! _bfd_stringtab_emit (abfd, strtab)) 3136 return FALSE; 3137 _bfd_stringtab_free (strtab); 3138 } 3139 3140 abfd->output_has_begun = TRUE; 3141 3142 return TRUE; 3143} 3144 3145/* Create a mapping from a set of sections to a program segment. */ 3146 3147static struct elf_segment_map * 3148make_mapping (bfd *abfd, 3149 asection **sections, 3150 unsigned int from, 3151 unsigned int to, 3152 bfd_boolean phdr) 3153{ 3154 struct elf_segment_map *m; 3155 unsigned int i; 3156 asection **hdrpp; 3157 bfd_size_type amt; 3158 3159 amt = sizeof (struct elf_segment_map); 3160 amt += (to - from - 1) * sizeof (asection *); 3161 m = bfd_zalloc (abfd, amt); 3162 if (m == NULL) 3163 return NULL; 3164 m->next = NULL; 3165 m->p_type = PT_LOAD; 3166 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++) 3167 m->sections[i - from] = *hdrpp; 3168 m->count = to - from; 3169 3170 if (from == 0 && phdr) 3171 { 3172 /* Include the headers in the first PT_LOAD segment. */ 3173 m->includes_filehdr = 1; 3174 m->includes_phdrs = 1; 3175 } 3176 3177 return m; 3178} 3179 3180/* Set up a mapping from BFD sections to program segments. */ 3181 3182static bfd_boolean 3183map_sections_to_segments (bfd *abfd) 3184{ 3185 asection **sections = NULL; 3186 asection *s; 3187 unsigned int i; 3188 unsigned int count; 3189 struct elf_segment_map *mfirst; 3190 struct elf_segment_map **pm; 3191 struct elf_segment_map *m; 3192 asection *last_hdr; 3193 bfd_vma last_size; 3194 unsigned int phdr_index; 3195 bfd_vma maxpagesize; 3196 asection **hdrpp; 3197 bfd_boolean phdr_in_segment = TRUE; 3198 bfd_boolean writable; 3199 int tls_count = 0; 3200 asection *first_tls = NULL; 3201 asection *dynsec, *eh_frame_hdr; 3202 bfd_size_type amt; 3203 3204 if (elf_tdata (abfd)->segment_map != NULL) 3205 return TRUE; 3206 3207 if (bfd_count_sections (abfd) == 0) 3208 return TRUE; 3209 3210 /* Select the allocated sections, and sort them. */ 3211 3212 amt = bfd_count_sections (abfd) * sizeof (asection *); 3213 sections = bfd_malloc (amt); 3214 if (sections == NULL) 3215 goto error_return; 3216 3217 i = 0; 3218 for (s = abfd->sections; s != NULL; s = s->next) 3219 { 3220 if ((s->flags & SEC_ALLOC) != 0) 3221 { 3222 sections[i] = s; 3223 ++i; 3224 } 3225 } 3226 BFD_ASSERT (i <= bfd_count_sections (abfd)); 3227 count = i; 3228 3229 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections); 3230 3231 /* Build the mapping. */ 3232 3233 mfirst = NULL; 3234 pm = &mfirst; 3235 3236 /* If we have a .interp section, then create a PT_PHDR segment for 3237 the program headers and a PT_INTERP segment for the .interp 3238 section. */ 3239 s = bfd_get_section_by_name (abfd, ".interp"); 3240 if (s != NULL && (s->flags & SEC_LOAD) != 0) 3241 { 3242 amt = sizeof (struct elf_segment_map); 3243 m = bfd_zalloc (abfd, amt); 3244 if (m == NULL) 3245 goto error_return; 3246 m->next = NULL; 3247 m->p_type = PT_PHDR; 3248 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */ 3249 m->p_flags = PF_R | PF_X; 3250 m->p_flags_valid = 1; 3251 m->includes_phdrs = 1; 3252 3253 *pm = m; 3254 pm = &m->next; 3255 3256 amt = sizeof (struct elf_segment_map); 3257 m = bfd_zalloc (abfd, amt); 3258 if (m == NULL) 3259 goto error_return; 3260 m->next = NULL; 3261 m->p_type = PT_INTERP; 3262 m->count = 1; 3263 m->sections[0] = s; 3264 3265 *pm = m; 3266 pm = &m->next; 3267 } 3268 3269 /* Look through the sections. We put sections in the same program 3270 segment when the start of the second section can be placed within 3271 a few bytes of the end of the first section. */ 3272 last_hdr = NULL; 3273 last_size = 0; 3274 phdr_index = 0; 3275 maxpagesize = get_elf_backend_data (abfd)->maxpagesize; 3276 writable = FALSE; 3277 dynsec = bfd_get_section_by_name (abfd, ".dynamic"); 3278 if (dynsec != NULL 3279 && (dynsec->flags & SEC_LOAD) == 0) 3280 dynsec = NULL; 3281 3282 /* Deal with -Ttext or something similar such that the first section 3283 is not adjacent to the program headers. This is an 3284 approximation, since at this point we don't know exactly how many 3285 program headers we will need. */ 3286 if (count > 0) 3287 { 3288 bfd_size_type phdr_size; 3289 3290 phdr_size = elf_tdata (abfd)->program_header_size; 3291 if (phdr_size == 0) 3292 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr; 3293 if ((abfd->flags & D_PAGED) == 0 3294 || sections[0]->lma < phdr_size 3295 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize) 3296 phdr_in_segment = FALSE; 3297 } 3298 3299 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++) 3300 { 3301 asection *hdr; 3302 bfd_boolean new_segment; 3303 3304 hdr = *hdrpp; 3305 3306 /* See if this section and the last one will fit in the same 3307 segment. */ 3308 3309 if (last_hdr == NULL) 3310 { 3311 /* If we don't have a segment yet, then we don't need a new 3312 one (we build the last one after this loop). */ 3313 new_segment = FALSE; 3314 } 3315 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma) 3316 { 3317 /* If this section has a different relation between the 3318 virtual address and the load address, then we need a new 3319 segment. */ 3320 new_segment = TRUE; 3321 } 3322 else if (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) 3323 < BFD_ALIGN (hdr->lma, maxpagesize)) 3324 { 3325 /* If putting this section in this segment would force us to 3326 skip a page in the segment, then we need a new segment. */ 3327 new_segment = TRUE; 3328 } 3329 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0 3330 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0) 3331 { 3332 /* We don't want to put a loadable section after a 3333 nonloadable section in the same segment. 3334 Consider .tbss sections as loadable for this purpose. */ 3335 new_segment = TRUE; 3336 } 3337 else if ((abfd->flags & D_PAGED) == 0) 3338 { 3339 /* If the file is not demand paged, which means that we 3340 don't require the sections to be correctly aligned in the 3341 file, then there is no other reason for a new segment. */ 3342 new_segment = FALSE; 3343 } 3344 else if (! writable 3345 && (hdr->flags & SEC_READONLY) == 0 3346 && (((last_hdr->lma + last_size - 1) 3347 & ~(maxpagesize - 1)) 3348 != (hdr->lma & ~(maxpagesize - 1)))) 3349 { 3350 /* We don't want to put a writable section in a read only 3351 segment, unless they are on the same page in memory 3352 anyhow. We already know that the last section does not 3353 bring us past the current section on the page, so the 3354 only case in which the new section is not on the same 3355 page as the previous section is when the previous section 3356 ends precisely on a page boundary. */ 3357 new_segment = TRUE; 3358 } 3359 else 3360 { 3361 /* Otherwise, we can use the same segment. */ 3362 new_segment = FALSE; 3363 } 3364 3365 if (! new_segment) 3366 { 3367 if ((hdr->flags & SEC_READONLY) == 0) 3368 writable = TRUE; 3369 last_hdr = hdr; 3370 /* .tbss sections effectively have zero size. */ 3371 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL) 3372 last_size = hdr->_raw_size; 3373 else 3374 last_size = 0; 3375 continue; 3376 } 3377 3378 /* We need a new program segment. We must create a new program 3379 header holding all the sections from phdr_index until hdr. */ 3380 3381 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment); 3382 if (m == NULL) 3383 goto error_return; 3384 3385 *pm = m; 3386 pm = &m->next; 3387 3388 if ((hdr->flags & SEC_READONLY) == 0) 3389 writable = TRUE; 3390 else 3391 writable = FALSE; 3392 3393 last_hdr = hdr; 3394 /* .tbss sections effectively have zero size. */ 3395 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL) 3396 last_size = hdr->_raw_size; 3397 else 3398 last_size = 0; 3399 phdr_index = i; 3400 phdr_in_segment = FALSE; 3401 } 3402 3403 /* Create a final PT_LOAD program segment. */ 3404 if (last_hdr != NULL) 3405 { 3406 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment); 3407 if (m == NULL) 3408 goto error_return; 3409 3410 *pm = m; 3411 pm = &m->next; 3412 } 3413 3414 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */ 3415 if (dynsec != NULL) 3416 { 3417 amt = sizeof (struct elf_segment_map); 3418 m = bfd_zalloc (abfd, amt); 3419 if (m == NULL) 3420 goto error_return; 3421 m->next = NULL; 3422 m->p_type = PT_DYNAMIC; 3423 m->count = 1; 3424 m->sections[0] = dynsec; 3425 3426 *pm = m; 3427 pm = &m->next; 3428 } 3429 3430 /* For each loadable .note section, add a PT_NOTE segment. We don't 3431 use bfd_get_section_by_name, because if we link together 3432 nonloadable .note sections and loadable .note sections, we will 3433 generate two .note sections in the output file. FIXME: Using 3434 names for section types is bogus anyhow. */ 3435 for (s = abfd->sections; s != NULL; s = s->next) 3436 { 3437 if ((s->flags & SEC_LOAD) != 0 3438 && strncmp (s->name, ".note", 5) == 0) 3439 { 3440 amt = sizeof (struct elf_segment_map); 3441 m = bfd_zalloc (abfd, amt); 3442 if (m == NULL) 3443 goto error_return; 3444 m->next = NULL; 3445 m->p_type = PT_NOTE; 3446 m->count = 1; 3447 m->sections[0] = s; 3448 3449 *pm = m; 3450 pm = &m->next; 3451 } 3452 if (s->flags & SEC_THREAD_LOCAL) 3453 { 3454 if (! tls_count) 3455 first_tls = s; 3456 tls_count++; 3457 } 3458 } 3459 3460 /* If there are any SHF_TLS output sections, add PT_TLS segment. */ 3461 if (tls_count > 0) 3462 { 3463 int i; 3464 3465 amt = sizeof (struct elf_segment_map); 3466 amt += (tls_count - 1) * sizeof (asection *); 3467 m = bfd_zalloc (abfd, amt); 3468 if (m == NULL) 3469 goto error_return; 3470 m->next = NULL; 3471 m->p_type = PT_TLS; 3472 m->count = tls_count; 3473 /* Mandated PF_R. */ 3474 m->p_flags = PF_R; 3475 m->p_flags_valid = 1; 3476 for (i = 0; i < tls_count; ++i) 3477 { 3478 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL); 3479 m->sections[i] = first_tls; 3480 first_tls = first_tls->next; 3481 } 3482 3483 *pm = m; 3484 pm = &m->next; 3485 } 3486 3487 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME 3488 segment. */ 3489 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr; 3490 if (eh_frame_hdr != NULL 3491 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0) 3492 { 3493 amt = sizeof (struct elf_segment_map); 3494 m = bfd_zalloc (abfd, amt); 3495 if (m == NULL) 3496 goto error_return; 3497 m->next = NULL; 3498 m->p_type = PT_GNU_EH_FRAME; 3499 m->count = 1; 3500 m->sections[0] = eh_frame_hdr->output_section; 3501 3502 *pm = m; 3503 pm = &m->next; 3504 } 3505 3506 if (elf_tdata (abfd)->stack_flags) 3507 { 3508 amt = sizeof (struct elf_segment_map); 3509 m = bfd_zalloc (abfd, amt); 3510 if (m == NULL) 3511 goto error_return; 3512 m->next = NULL; 3513 m->p_type = PT_GNU_STACK; 3514 m->p_flags = elf_tdata (abfd)->stack_flags; 3515 m->p_flags_valid = 1; 3516 3517 *pm = m; 3518 pm = &m->next; 3519 } 3520 3521 free (sections); 3522 sections = NULL; 3523 3524 elf_tdata (abfd)->segment_map = mfirst; 3525 return TRUE; 3526 3527 error_return: 3528 if (sections != NULL) 3529 free (sections); 3530 return FALSE; 3531} 3532 3533/* Sort sections by address. */ 3534 3535static int 3536elf_sort_sections (const void *arg1, const void *arg2) 3537{ 3538 const asection *sec1 = *(const asection **) arg1; 3539 const asection *sec2 = *(const asection **) arg2; 3540 bfd_size_type size1, size2; 3541 3542 /* Sort by LMA first, since this is the address used to 3543 place the section into a segment. */ 3544 if (sec1->lma < sec2->lma) 3545 return -1; 3546 else if (sec1->lma > sec2->lma) 3547 return 1; 3548 3549 /* Then sort by VMA. Normally the LMA and the VMA will be 3550 the same, and this will do nothing. */ 3551 if (sec1->vma < sec2->vma) 3552 return -1; 3553 else if (sec1->vma > sec2->vma) 3554 return 1; 3555 3556 /* Put !SEC_LOAD sections after SEC_LOAD ones. */ 3557 3558#define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0) 3559 3560 if (TOEND (sec1)) 3561 { 3562 if (TOEND (sec2)) 3563 { 3564 /* If the indicies are the same, do not return 0 3565 here, but continue to try the next comparison. */ 3566 if (sec1->target_index - sec2->target_index != 0) 3567 return sec1->target_index - sec2->target_index; 3568 } 3569 else 3570 return 1; 3571 } 3572 else if (TOEND (sec2)) 3573 return -1; 3574 3575#undef TOEND 3576 3577 /* Sort by size, to put zero sized sections 3578 before others at the same address. */ 3579 3580 size1 = (sec1->flags & SEC_LOAD) ? sec1->_raw_size : 0; 3581 size2 = (sec2->flags & SEC_LOAD) ? sec2->_raw_size : 0; 3582 3583 if (size1 < size2) 3584 return -1; 3585 if (size1 > size2) 3586 return 1; 3587 3588 return sec1->target_index - sec2->target_index; 3589} 3590 3591/* Ian Lance Taylor writes: 3592 3593 We shouldn't be using % with a negative signed number. That's just 3594 not good. We have to make sure either that the number is not 3595 negative, or that the number has an unsigned type. When the types 3596 are all the same size they wind up as unsigned. When file_ptr is a 3597 larger signed type, the arithmetic winds up as signed long long, 3598 which is wrong. 3599 3600 What we're trying to say here is something like ``increase OFF by 3601 the least amount that will cause it to be equal to the VMA modulo 3602 the page size.'' */ 3603/* In other words, something like: 3604 3605 vma_offset = m->sections[0]->vma % bed->maxpagesize; 3606 off_offset = off % bed->maxpagesize; 3607 if (vma_offset < off_offset) 3608 adjustment = vma_offset + bed->maxpagesize - off_offset; 3609 else 3610 adjustment = vma_offset - off_offset; 3611 3612 which can can be collapsed into the expression below. */ 3613 3614static file_ptr 3615vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize) 3616{ 3617 return ((vma - off) % maxpagesize); 3618} 3619 3620/* Assign file positions to the sections based on the mapping from 3621 sections to segments. This function also sets up some fields in 3622 the file header, and writes out the program headers. */ 3623 3624static bfd_boolean 3625assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info) 3626{ 3627 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 3628 unsigned int count; 3629 struct elf_segment_map *m; 3630 unsigned int alloc; 3631 Elf_Internal_Phdr *phdrs; 3632 file_ptr off, voff; 3633 bfd_vma filehdr_vaddr, filehdr_paddr; 3634 bfd_vma phdrs_vaddr, phdrs_paddr; 3635 Elf_Internal_Phdr *p; 3636 bfd_size_type amt; 3637 3638 if (elf_tdata (abfd)->segment_map == NULL) 3639 { 3640 if (! map_sections_to_segments (abfd)) 3641 return FALSE; 3642 } 3643 else 3644 { 3645 /* The placement algorithm assumes that non allocated sections are 3646 not in PT_LOAD segments. We ensure this here by removing such 3647 sections from the segment map. */ 3648 for (m = elf_tdata (abfd)->segment_map; 3649 m != NULL; 3650 m = m->next) 3651 { 3652 unsigned int new_count; 3653 unsigned int i; 3654 3655 if (m->p_type != PT_LOAD) 3656 continue; 3657 3658 new_count = 0; 3659 for (i = 0; i < m->count; i ++) 3660 { 3661 if ((m->sections[i]->flags & SEC_ALLOC) != 0) 3662 { 3663 if (i != new_count) 3664 m->sections[new_count] = m->sections[i]; 3665 3666 new_count ++; 3667 } 3668 } 3669 3670 if (new_count != m->count) 3671 m->count = new_count; 3672 } 3673 } 3674 3675 if (bed->elf_backend_modify_segment_map) 3676 { 3677 if (! (*bed->elf_backend_modify_segment_map) (abfd, link_info)) 3678 return FALSE; 3679 } 3680 3681 count = 0; 3682 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) 3683 ++count; 3684 3685 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr; 3686 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr; 3687 elf_elfheader (abfd)->e_phnum = count; 3688 3689 if (count == 0) 3690 return TRUE; 3691 3692 /* If we already counted the number of program segments, make sure 3693 that we allocated enough space. This happens when SIZEOF_HEADERS 3694 is used in a linker script. */ 3695 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr; 3696 if (alloc != 0 && count > alloc) 3697 { 3698 ((*_bfd_error_handler) 3699 (_("%s: Not enough room for program headers (allocated %u, need %u)"), 3700 bfd_get_filename (abfd), alloc, count)); 3701 bfd_set_error (bfd_error_bad_value); 3702 return FALSE; 3703 } 3704 3705 if (alloc == 0) 3706 alloc = count; 3707 3708 amt = alloc * sizeof (Elf_Internal_Phdr); 3709 phdrs = bfd_alloc (abfd, amt); 3710 if (phdrs == NULL) 3711 return FALSE; 3712 3713 off = bed->s->sizeof_ehdr; 3714 off += alloc * bed->s->sizeof_phdr; 3715 3716 filehdr_vaddr = 0; 3717 filehdr_paddr = 0; 3718 phdrs_vaddr = 0; 3719 phdrs_paddr = 0; 3720 3721 for (m = elf_tdata (abfd)->segment_map, p = phdrs; 3722 m != NULL; 3723 m = m->next, p++) 3724 { 3725 unsigned int i; 3726 asection **secpp; 3727 3728 /* If elf_segment_map is not from map_sections_to_segments, the 3729 sections may not be correctly ordered. NOTE: sorting should 3730 not be done to the PT_NOTE section of a corefile, which may 3731 contain several pseudo-sections artificially created by bfd. 3732 Sorting these pseudo-sections breaks things badly. */ 3733 if (m->count > 1 3734 && !(elf_elfheader (abfd)->e_type == ET_CORE 3735 && m->p_type == PT_NOTE)) 3736 qsort (m->sections, (size_t) m->count, sizeof (asection *), 3737 elf_sort_sections); 3738 3739 p->p_type = m->p_type; 3740 p->p_flags = m->p_flags; 3741 3742 if (p->p_type == PT_LOAD 3743 && m->count > 0 3744 && (m->sections[0]->flags & SEC_ALLOC) != 0) 3745 { 3746 if ((abfd->flags & D_PAGED) != 0) 3747 off += vma_page_aligned_bias (m->sections[0]->vma, off, 3748 bed->maxpagesize); 3749 else 3750 { 3751 bfd_size_type align; 3752 3753 align = 0; 3754 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++) 3755 { 3756 bfd_size_type secalign; 3757 3758 secalign = bfd_get_section_alignment (abfd, *secpp); 3759 if (secalign > align) 3760 align = secalign; 3761 } 3762 3763 off += vma_page_aligned_bias (m->sections[0]->vma, off, 3764 1 << align); 3765 } 3766 } 3767 3768 if (m->count == 0) 3769 p->p_vaddr = 0; 3770 else 3771 p->p_vaddr = m->sections[0]->vma; 3772 3773 if (m->p_paddr_valid) 3774 p->p_paddr = m->p_paddr; 3775 else if (m->count == 0) 3776 p->p_paddr = 0; 3777 else 3778 p->p_paddr = m->sections[0]->lma; 3779 3780 if (p->p_type == PT_LOAD 3781 && (abfd->flags & D_PAGED) != 0) 3782 p->p_align = bed->maxpagesize; 3783 else if (m->count == 0) 3784 p->p_align = 1 << bed->s->log_file_align; 3785 else 3786 p->p_align = 0; 3787 3788 p->p_offset = 0; 3789 p->p_filesz = 0; 3790 p->p_memsz = 0; 3791 3792 if (m->includes_filehdr) 3793 { 3794 if (! m->p_flags_valid) 3795 p->p_flags |= PF_R; 3796 p->p_offset = 0; 3797 p->p_filesz = bed->s->sizeof_ehdr; 3798 p->p_memsz = bed->s->sizeof_ehdr; 3799 if (m->count > 0) 3800 { 3801 BFD_ASSERT (p->p_type == PT_LOAD); 3802 3803 if (p->p_vaddr < (bfd_vma) off) 3804 { 3805 (*_bfd_error_handler) 3806 (_("%s: Not enough room for program headers, try linking with -N"), 3807 bfd_get_filename (abfd)); 3808 bfd_set_error (bfd_error_bad_value); 3809 return FALSE; 3810 } 3811 3812 p->p_vaddr -= off; 3813 if (! m->p_paddr_valid) 3814 p->p_paddr -= off; 3815 } 3816 if (p->p_type == PT_LOAD) 3817 { 3818 filehdr_vaddr = p->p_vaddr; 3819 filehdr_paddr = p->p_paddr; 3820 } 3821 } 3822 3823 if (m->includes_phdrs) 3824 { 3825 if (! m->p_flags_valid) 3826 p->p_flags |= PF_R; 3827 3828 if (m->includes_filehdr) 3829 { 3830 if (p->p_type == PT_LOAD) 3831 { 3832 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr; 3833 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr; 3834 } 3835 } 3836 else 3837 { 3838 p->p_offset = bed->s->sizeof_ehdr; 3839 3840 if (m->count > 0) 3841 { 3842 BFD_ASSERT (p->p_type == PT_LOAD); 3843 p->p_vaddr -= off - p->p_offset; 3844 if (! m->p_paddr_valid) 3845 p->p_paddr -= off - p->p_offset; 3846 } 3847 3848 if (p->p_type == PT_LOAD) 3849 { 3850 phdrs_vaddr = p->p_vaddr; 3851 phdrs_paddr = p->p_paddr; 3852 } 3853 else 3854 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr; 3855 } 3856 3857 p->p_filesz += alloc * bed->s->sizeof_phdr; 3858 p->p_memsz += alloc * bed->s->sizeof_phdr; 3859 } 3860 3861 if (p->p_type == PT_LOAD 3862 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)) 3863 { 3864 if (! m->includes_filehdr && ! m->includes_phdrs) 3865 p->p_offset = off; 3866 else 3867 { 3868 file_ptr adjust; 3869 3870 adjust = off - (p->p_offset + p->p_filesz); 3871 p->p_filesz += adjust; 3872 p->p_memsz += adjust; 3873 } 3874 } 3875 3876 voff = off; 3877 3878 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++) 3879 { 3880 asection *sec; 3881 flagword flags; 3882 bfd_size_type align; 3883 3884 sec = *secpp; 3885 flags = sec->flags; 3886 align = 1 << bfd_get_section_alignment (abfd, sec); 3887 3888 /* The section may have artificial alignment forced by a 3889 link script. Notice this case by the gap between the 3890 cumulative phdr lma and the section's lma. */ 3891 if (p->p_paddr + p->p_memsz < sec->lma) 3892 { 3893 bfd_vma adjust = sec->lma - (p->p_paddr + p->p_memsz); 3894 3895 p->p_memsz += adjust; 3896 if (p->p_type == PT_LOAD 3897 || (p->p_type == PT_NOTE 3898 && bfd_get_format (abfd) == bfd_core)) 3899 { 3900 off += adjust; 3901 voff += adjust; 3902 } 3903 if ((flags & SEC_LOAD) != 0 3904 || (flags & SEC_THREAD_LOCAL) != 0) 3905 p->p_filesz += adjust; 3906 } 3907 3908 if (p->p_type == PT_LOAD) 3909 { 3910 bfd_signed_vma adjust; 3911 3912 if ((flags & SEC_LOAD) != 0) 3913 { 3914 adjust = sec->lma - (p->p_paddr + p->p_memsz); 3915 if (adjust < 0) 3916 adjust = 0; 3917 } 3918 else if ((flags & SEC_ALLOC) != 0) 3919 { 3920 /* The section VMA must equal the file position 3921 modulo the page size. FIXME: I'm not sure if 3922 this adjustment is really necessary. We used to 3923 not have the SEC_LOAD case just above, and then 3924 this was necessary, but now I'm not sure. */ 3925 if ((abfd->flags & D_PAGED) != 0) 3926 adjust = vma_page_aligned_bias (sec->vma, voff, 3927 bed->maxpagesize); 3928 else 3929 adjust = vma_page_aligned_bias (sec->vma, voff, 3930 align); 3931 } 3932 else 3933 adjust = 0; 3934 3935 if (adjust != 0) 3936 { 3937 if (i == 0) 3938 { 3939 (* _bfd_error_handler) (_("\ 3940Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"), 3941 bfd_section_name (abfd, sec), 3942 sec->lma, 3943 p->p_paddr); 3944 return FALSE; 3945 } 3946 p->p_memsz += adjust; 3947 off += adjust; 3948 voff += adjust; 3949 if ((flags & SEC_LOAD) != 0) 3950 p->p_filesz += adjust; 3951 } 3952 3953 sec->filepos = off; 3954 3955 /* We check SEC_HAS_CONTENTS here because if NOLOAD is 3956 used in a linker script we may have a section with 3957 SEC_LOAD clear but which is supposed to have 3958 contents. */ 3959 if ((flags & SEC_LOAD) != 0 3960 || (flags & SEC_HAS_CONTENTS) != 0) 3961 off += sec->_raw_size; 3962 3963 if ((flags & SEC_ALLOC) != 0 3964 && ((flags & SEC_LOAD) != 0 3965 || (flags & SEC_THREAD_LOCAL) == 0)) 3966 voff += sec->_raw_size; 3967 } 3968 3969 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core) 3970 { 3971 /* The actual "note" segment has i == 0. 3972 This is the one that actually contains everything. */ 3973 if (i == 0) 3974 { 3975 sec->filepos = off; 3976 p->p_filesz = sec->_raw_size; 3977 off += sec->_raw_size; 3978 voff = off; 3979 } 3980 else 3981 { 3982 /* Fake sections -- don't need to be written. */ 3983 sec->filepos = 0; 3984 sec->_raw_size = 0; 3985 flags = sec->flags = 0; 3986 } 3987 p->p_memsz = 0; 3988 p->p_align = 1; 3989 } 3990 else 3991 { 3992 if ((sec->flags & SEC_LOAD) != 0 3993 || (sec->flags & SEC_THREAD_LOCAL) == 0 3994 || p->p_type == PT_TLS) 3995 p->p_memsz += sec->_raw_size; 3996 3997 if ((flags & SEC_LOAD) != 0) 3998 p->p_filesz += sec->_raw_size; 3999 4000 if (p->p_type == PT_TLS 4001 && sec->_raw_size == 0 4002 && (sec->flags & SEC_HAS_CONTENTS) == 0) 4003 { 4004 struct bfd_link_order *o; 4005 bfd_vma tbss_size = 0; 4006 4007 for (o = sec->link_order_head; o != NULL; o = o->next) 4008 if (tbss_size < o->offset + o->size) 4009 tbss_size = o->offset + o->size; 4010 4011 p->p_memsz += tbss_size; 4012 } 4013 4014 if (align > p->p_align 4015 && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0)) 4016 p->p_align = align; 4017 } 4018 4019 if (! m->p_flags_valid) 4020 { 4021 p->p_flags |= PF_R; 4022 if ((flags & SEC_CODE) != 0) 4023 p->p_flags |= PF_X; 4024 if ((flags & SEC_READONLY) == 0) 4025 p->p_flags |= PF_W; 4026 } 4027 } 4028 } 4029 4030 /* Now that we have set the section file positions, we can set up 4031 the file positions for the non PT_LOAD segments. */ 4032 for (m = elf_tdata (abfd)->segment_map, p = phdrs; 4033 m != NULL; 4034 m = m->next, p++) 4035 { 4036 if (p->p_type != PT_LOAD && m->count > 0) 4037 { 4038 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs); 4039 p->p_offset = m->sections[0]->filepos; 4040 } 4041 if (m->count == 0) 4042 { 4043 if (m->includes_filehdr) 4044 { 4045 p->p_vaddr = filehdr_vaddr; 4046 if (! m->p_paddr_valid) 4047 p->p_paddr = filehdr_paddr; 4048 } 4049 else if (m->includes_phdrs) 4050 { 4051 p->p_vaddr = phdrs_vaddr; 4052 if (! m->p_paddr_valid) 4053 p->p_paddr = phdrs_paddr; 4054 } 4055 } 4056 } 4057 4058 /* Clear out any program headers we allocated but did not use. */ 4059 for (; count < alloc; count++, p++) 4060 { 4061 memset (p, 0, sizeof *p); 4062 p->p_type = PT_NULL; 4063 } 4064 4065 elf_tdata (abfd)->phdr = phdrs; 4066 4067 elf_tdata (abfd)->next_file_pos = off; 4068 4069 /* Write out the program headers. */ 4070 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0 4071 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0) 4072 return FALSE; 4073 4074 return TRUE; 4075} 4076 4077/* Get the size of the program header. 4078 4079 If this is called by the linker before any of the section VMA's are set, it 4080 can't calculate the correct value for a strange memory layout. This only 4081 happens when SIZEOF_HEADERS is used in a linker script. In this case, 4082 SORTED_HDRS is NULL and we assume the normal scenario of one text and one 4083 data segment (exclusive of .interp and .dynamic). 4084 4085 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there 4086 will be two segments. */ 4087 4088static bfd_size_type 4089get_program_header_size (bfd *abfd) 4090{ 4091 size_t segs; 4092 asection *s; 4093 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 4094 4095 /* We can't return a different result each time we're called. */ 4096 if (elf_tdata (abfd)->program_header_size != 0) 4097 return elf_tdata (abfd)->program_header_size; 4098 4099 if (elf_tdata (abfd)->segment_map != NULL) 4100 { 4101 struct elf_segment_map *m; 4102 4103 segs = 0; 4104 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) 4105 ++segs; 4106 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr; 4107 return elf_tdata (abfd)->program_header_size; 4108 } 4109 4110 /* Assume we will need exactly two PT_LOAD segments: one for text 4111 and one for data. */ 4112 segs = 2; 4113 4114 s = bfd_get_section_by_name (abfd, ".interp"); 4115 if (s != NULL && (s->flags & SEC_LOAD) != 0) 4116 { 4117 /* If we have a loadable interpreter section, we need a 4118 PT_INTERP segment. In this case, assume we also need a 4119 PT_PHDR segment, although that may not be true for all 4120 targets. */ 4121 segs += 2; 4122 } 4123 4124 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL) 4125 { 4126 /* We need a PT_DYNAMIC segment. */ 4127 ++segs; 4128 } 4129 4130 if (elf_tdata (abfd)->eh_frame_hdr) 4131 { 4132 /* We need a PT_GNU_EH_FRAME segment. */ 4133 ++segs; 4134 } 4135 4136 if (elf_tdata (abfd)->stack_flags) 4137 { 4138 /* We need a PT_GNU_STACK segment. */ 4139 ++segs; 4140 } 4141 4142 for (s = abfd->sections; s != NULL; s = s->next) 4143 { 4144 if ((s->flags & SEC_LOAD) != 0 4145 && strncmp (s->name, ".note", 5) == 0) 4146 { 4147 /* We need a PT_NOTE segment. */ 4148 ++segs; 4149 } 4150 } 4151 4152 for (s = abfd->sections; s != NULL; s = s->next) 4153 { 4154 if (s->flags & SEC_THREAD_LOCAL) 4155 { 4156 /* We need a PT_TLS segment. */ 4157 ++segs; 4158 break; 4159 } 4160 } 4161 4162 /* Let the backend count up any program headers it might need. */ 4163 if (bed->elf_backend_additional_program_headers) 4164 { 4165 int a; 4166 4167 a = (*bed->elf_backend_additional_program_headers) (abfd); 4168 if (a == -1) 4169 abort (); 4170 segs += a; 4171 } 4172 4173 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr; 4174 return elf_tdata (abfd)->program_header_size; 4175} 4176 4177/* Work out the file positions of all the sections. This is called by 4178 _bfd_elf_compute_section_file_positions. All the section sizes and 4179 VMAs must be known before this is called. 4180 4181 We do not consider reloc sections at this point, unless they form 4182 part of the loadable image. Reloc sections are assigned file 4183 positions in assign_file_positions_for_relocs, which is called by 4184 write_object_contents and final_link. 4185 4186 We also don't set the positions of the .symtab and .strtab here. */ 4187 4188static bfd_boolean 4189assign_file_positions_except_relocs (bfd *abfd, 4190 struct bfd_link_info *link_info) 4191{ 4192 struct elf_obj_tdata * const tdata = elf_tdata (abfd); 4193 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd); 4194 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd); 4195 unsigned int num_sec = elf_numsections (abfd); 4196 file_ptr off; 4197 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 4198 4199 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 4200 && bfd_get_format (abfd) != bfd_core) 4201 { 4202 Elf_Internal_Shdr **hdrpp; 4203 unsigned int i; 4204 4205 /* Start after the ELF header. */ 4206 off = i_ehdrp->e_ehsize; 4207 4208 /* We are not creating an executable, which means that we are 4209 not creating a program header, and that the actual order of 4210 the sections in the file is unimportant. */ 4211 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++) 4212 { 4213 Elf_Internal_Shdr *hdr; 4214 4215 hdr = *hdrpp; 4216 if (hdr->sh_type == SHT_REL 4217 || hdr->sh_type == SHT_RELA 4218 || i == tdata->symtab_section 4219 || i == tdata->symtab_shndx_section 4220 || i == tdata->strtab_section) 4221 { 4222 hdr->sh_offset = -1; 4223 } 4224 else 4225 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE); 4226 4227 if (i == SHN_LORESERVE - 1) 4228 { 4229 i += SHN_HIRESERVE + 1 - SHN_LORESERVE; 4230 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE; 4231 } 4232 } 4233 } 4234 else 4235 { 4236 unsigned int i; 4237 Elf_Internal_Shdr **hdrpp; 4238 4239 /* Assign file positions for the loaded sections based on the 4240 assignment of sections to segments. */ 4241 if (! assign_file_positions_for_segments (abfd, link_info)) 4242 return FALSE; 4243 4244 /* Assign file positions for the other sections. */ 4245 4246 off = elf_tdata (abfd)->next_file_pos; 4247 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++) 4248 { 4249 Elf_Internal_Shdr *hdr; 4250 4251 hdr = *hdrpp; 4252 if (hdr->bfd_section != NULL 4253 && hdr->bfd_section->filepos != 0) 4254 hdr->sh_offset = hdr->bfd_section->filepos; 4255 else if ((hdr->sh_flags & SHF_ALLOC) != 0) 4256 { 4257 ((*_bfd_error_handler) 4258 (_("%s: warning: allocated section `%s' not in segment"), 4259 bfd_get_filename (abfd), 4260 (hdr->bfd_section == NULL 4261 ? "*unknown*" 4262 : hdr->bfd_section->name))); 4263 if ((abfd->flags & D_PAGED) != 0) 4264 off += vma_page_aligned_bias (hdr->sh_addr, off, 4265 bed->maxpagesize); 4266 else 4267 off += vma_page_aligned_bias (hdr->sh_addr, off, 4268 hdr->sh_addralign); 4269 off = _bfd_elf_assign_file_position_for_section (hdr, off, 4270 FALSE); 4271 } 4272 else if (hdr == i_shdrpp[tdata->symtab_section] 4273 || hdr == i_shdrpp[tdata->symtab_shndx_section] 4274 || hdr == i_shdrpp[tdata->strtab_section]) 4275 hdr->sh_offset = -1; 4276 else 4277 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE); 4278 4279 if (i == SHN_LORESERVE - 1) 4280 { 4281 i += SHN_HIRESERVE + 1 - SHN_LORESERVE; 4282 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE; 4283 } 4284 } 4285 } 4286 4287 /* Place the section headers. */ 4288 off = align_file_position (off, 1 << bed->s->log_file_align); 4289 i_ehdrp->e_shoff = off; 4290 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; 4291 4292 elf_tdata (abfd)->next_file_pos = off; 4293 4294 return TRUE; 4295} 4296 4297static bfd_boolean 4298prep_headers (bfd *abfd) 4299{ 4300 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ 4301 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */ 4302 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ 4303 struct elf_strtab_hash *shstrtab; 4304 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 4305 4306 i_ehdrp = elf_elfheader (abfd); 4307 i_shdrp = elf_elfsections (abfd); 4308 4309 shstrtab = _bfd_elf_strtab_init (); 4310 if (shstrtab == NULL) 4311 return FALSE; 4312 4313 elf_shstrtab (abfd) = shstrtab; 4314 4315 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0; 4316 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1; 4317 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2; 4318 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3; 4319 4320 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass; 4321 i_ehdrp->e_ident[EI_DATA] = 4322 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB; 4323 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current; 4324 4325 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD; 4326 4327 if ((abfd->flags & DYNAMIC) != 0) 4328 i_ehdrp->e_type = ET_DYN; 4329 else if ((abfd->flags & EXEC_P) != 0) 4330 i_ehdrp->e_type = ET_EXEC; 4331 else if (bfd_get_format (abfd) == bfd_core) 4332 i_ehdrp->e_type = ET_CORE; 4333 else 4334 i_ehdrp->e_type = ET_REL; 4335 4336 switch (bfd_get_arch (abfd)) 4337 { 4338 case bfd_arch_unknown: 4339 i_ehdrp->e_machine = EM_NONE; 4340 break; 4341 4342 /* There used to be a long list of cases here, each one setting 4343 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE 4344 in the corresponding bfd definition. To avoid duplication, 4345 the switch was removed. Machines that need special handling 4346 can generally do it in elf_backend_final_write_processing(), 4347 unless they need the information earlier than the final write. 4348 Such need can generally be supplied by replacing the tests for 4349 e_machine with the conditions used to determine it. */ 4350 default: 4351 i_ehdrp->e_machine = bed->elf_machine_code; 4352 } 4353 4354 i_ehdrp->e_version = bed->s->ev_current; 4355 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr; 4356 4357 /* No program header, for now. */ 4358 i_ehdrp->e_phoff = 0; 4359 i_ehdrp->e_phentsize = 0; 4360 i_ehdrp->e_phnum = 0; 4361 4362 /* Each bfd section is section header entry. */ 4363 i_ehdrp->e_entry = bfd_get_start_address (abfd); 4364 i_ehdrp->e_shentsize = bed->s->sizeof_shdr; 4365 4366 /* If we're building an executable, we'll need a program header table. */ 4367 if (abfd->flags & EXEC_P) 4368 { 4369 /* It all happens later. */ 4370#if 0 4371 i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); 4372 4373 /* elf_build_phdrs() returns a (NULL-terminated) array of 4374 Elf_Internal_Phdrs. */ 4375 i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum); 4376 i_ehdrp->e_phoff = outbase; 4377 outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum; 4378#endif 4379 } 4380 else 4381 { 4382 i_ehdrp->e_phentsize = 0; 4383 i_phdrp = 0; 4384 i_ehdrp->e_phoff = 0; 4385 } 4386 4387 elf_tdata (abfd)->symtab_hdr.sh_name = 4388 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE); 4389 elf_tdata (abfd)->strtab_hdr.sh_name = 4390 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE); 4391 elf_tdata (abfd)->shstrtab_hdr.sh_name = 4392 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE); 4393 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 4394 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 4395 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1) 4396 return FALSE; 4397 4398 return TRUE; 4399} 4400 4401/* Assign file positions for all the reloc sections which are not part 4402 of the loadable file image. */ 4403 4404void 4405_bfd_elf_assign_file_positions_for_relocs (bfd *abfd) 4406{ 4407 file_ptr off; 4408 unsigned int i, num_sec; 4409 Elf_Internal_Shdr **shdrpp; 4410 4411 off = elf_tdata (abfd)->next_file_pos; 4412 4413 num_sec = elf_numsections (abfd); 4414 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++) 4415 { 4416 Elf_Internal_Shdr *shdrp; 4417 4418 shdrp = *shdrpp; 4419 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA) 4420 && shdrp->sh_offset == -1) 4421 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE); 4422 } 4423 4424 elf_tdata (abfd)->next_file_pos = off; 4425} 4426 4427bfd_boolean 4428_bfd_elf_write_object_contents (bfd *abfd) 4429{ 4430 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 4431 Elf_Internal_Ehdr *i_ehdrp; 4432 Elf_Internal_Shdr **i_shdrp; 4433 bfd_boolean failed; 4434 unsigned int count, num_sec; 4435 4436 if (! abfd->output_has_begun 4437 && ! _bfd_elf_compute_section_file_positions (abfd, NULL)) 4438 return FALSE; 4439 4440 i_shdrp = elf_elfsections (abfd); 4441 i_ehdrp = elf_elfheader (abfd); 4442 4443 failed = FALSE; 4444 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed); 4445 if (failed) 4446 return FALSE; 4447 4448 _bfd_elf_assign_file_positions_for_relocs (abfd); 4449 4450 /* After writing the headers, we need to write the sections too... */ 4451 num_sec = elf_numsections (abfd); 4452 for (count = 1; count < num_sec; count++) 4453 { 4454 if (bed->elf_backend_section_processing) 4455 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]); 4456 if (i_shdrp[count]->contents) 4457 { 4458 bfd_size_type amt = i_shdrp[count]->sh_size; 4459 4460 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0 4461 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt) 4462 return FALSE; 4463 } 4464 if (count == SHN_LORESERVE - 1) 4465 count += SHN_HIRESERVE + 1 - SHN_LORESERVE; 4466 } 4467 4468 /* Write out the section header names. */ 4469 if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0 4470 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))) 4471 return FALSE; 4472 4473 if (bed->elf_backend_final_write_processing) 4474 (*bed->elf_backend_final_write_processing) (abfd, 4475 elf_tdata (abfd)->linker); 4476 4477 return bed->s->write_shdrs_and_ehdr (abfd); 4478} 4479 4480bfd_boolean 4481_bfd_elf_write_corefile_contents (bfd *abfd) 4482{ 4483 /* Hopefully this can be done just like an object file. */ 4484 return _bfd_elf_write_object_contents (abfd); 4485} 4486 4487/* Given a section, search the header to find them. */ 4488 4489int 4490_bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect) 4491{ 4492 const struct elf_backend_data *bed; 4493 int index; 4494 4495 if (elf_section_data (asect) != NULL 4496 && elf_section_data (asect)->this_idx != 0) 4497 return elf_section_data (asect)->this_idx; 4498 4499 if (bfd_is_abs_section (asect)) 4500 index = SHN_ABS; 4501 else if (bfd_is_com_section (asect)) 4502 index = SHN_COMMON; 4503 else if (bfd_is_und_section (asect)) 4504 index = SHN_UNDEF; 4505 else 4506 { 4507 Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); 4508 int maxindex = elf_numsections (abfd); 4509 4510 for (index = 1; index < maxindex; index++) 4511 { 4512 Elf_Internal_Shdr *hdr = i_shdrp[index]; 4513 4514 if (hdr != NULL && hdr->bfd_section == asect) 4515 return index; 4516 } 4517 index = -1; 4518 } 4519 4520 bed = get_elf_backend_data (abfd); 4521 if (bed->elf_backend_section_from_bfd_section) 4522 { 4523 int retval = index; 4524 4525 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval)) 4526 return retval; 4527 } 4528 4529 if (index == -1) 4530 bfd_set_error (bfd_error_nonrepresentable_section); 4531 4532 return index; 4533} 4534 4535/* Given a BFD symbol, return the index in the ELF symbol table, or -1 4536 on error. */ 4537 4538int 4539_bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr) 4540{ 4541 asymbol *asym_ptr = *asym_ptr_ptr; 4542 int idx; 4543 flagword flags = asym_ptr->flags; 4544 4545 /* When gas creates relocations against local labels, it creates its 4546 own symbol for the section, but does put the symbol into the 4547 symbol chain, so udata is 0. When the linker is generating 4548 relocatable output, this section symbol may be for one of the 4549 input sections rather than the output section. */ 4550 if (asym_ptr->udata.i == 0 4551 && (flags & BSF_SECTION_SYM) 4552 && asym_ptr->section) 4553 { 4554 int indx; 4555 4556 if (asym_ptr->section->output_section != NULL) 4557 indx = asym_ptr->section->output_section->index; 4558 else 4559 indx = asym_ptr->section->index; 4560 if (indx < elf_num_section_syms (abfd) 4561 && elf_section_syms (abfd)[indx] != NULL) 4562 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i; 4563 } 4564 4565 idx = asym_ptr->udata.i; 4566 4567 if (idx == 0) 4568 { 4569 /* This case can occur when using --strip-symbol on a symbol 4570 which is used in a relocation entry. */ 4571 (*_bfd_error_handler) 4572 (_("%s: symbol `%s' required but not present"), 4573 bfd_archive_filename (abfd), bfd_asymbol_name (asym_ptr)); 4574 bfd_set_error (bfd_error_no_symbols); 4575 return -1; 4576 } 4577 4578#if DEBUG & 4 4579 { 4580 fprintf (stderr, 4581 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n", 4582 (long) asym_ptr, asym_ptr->name, idx, flags, 4583 elf_symbol_flags (flags)); 4584 fflush (stderr); 4585 } 4586#endif 4587 4588 return idx; 4589} 4590 4591/* Copy private BFD data. This copies any program header information. */ 4592 4593static bfd_boolean 4594copy_private_bfd_data (bfd *ibfd, bfd *obfd) 4595{ 4596 Elf_Internal_Ehdr *iehdr; 4597 struct elf_segment_map *map; 4598 struct elf_segment_map *map_first; 4599 struct elf_segment_map **pointer_to_map; 4600 Elf_Internal_Phdr *segment; 4601 asection *section; 4602 unsigned int i; 4603 unsigned int num_segments; 4604 bfd_boolean phdr_included = FALSE; 4605 bfd_vma maxpagesize; 4606 struct elf_segment_map *phdr_adjust_seg = NULL; 4607 unsigned int phdr_adjust_num = 0; 4608 const struct elf_backend_data *bed; 4609 4610 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 4611 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 4612 return TRUE; 4613 4614 if (elf_tdata (ibfd)->phdr == NULL) 4615 return TRUE; 4616 4617 bed = get_elf_backend_data (ibfd); 4618 iehdr = elf_elfheader (ibfd); 4619 4620 map_first = NULL; 4621 pointer_to_map = &map_first; 4622 4623 num_segments = elf_elfheader (ibfd)->e_phnum; 4624 maxpagesize = get_elf_backend_data (obfd)->maxpagesize; 4625 4626 /* Returns the end address of the segment + 1. */ 4627#define SEGMENT_END(segment, start) \ 4628 (start + (segment->p_memsz > segment->p_filesz \ 4629 ? segment->p_memsz : segment->p_filesz)) 4630 4631#define SECTION_SIZE(section, segment) \ 4632 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \ 4633 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \ 4634 ? section->_raw_size : 0) 4635 4636 /* Returns TRUE if the given section is contained within 4637 the given segment. VMA addresses are compared. */ 4638#define IS_CONTAINED_BY_VMA(section, segment) \ 4639 (section->vma >= segment->p_vaddr \ 4640 && (section->vma + SECTION_SIZE (section, segment) \ 4641 <= (SEGMENT_END (segment, segment->p_vaddr)))) 4642 4643 /* Returns TRUE if the given section is contained within 4644 the given segment. LMA addresses are compared. */ 4645#define IS_CONTAINED_BY_LMA(section, segment, base) \ 4646 (section->lma >= base \ 4647 && (section->lma + SECTION_SIZE (section, segment) \ 4648 <= SEGMENT_END (segment, base))) 4649 4650 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */ 4651#define IS_COREFILE_NOTE(p, s) \ 4652 (p->p_type == PT_NOTE \ 4653 && bfd_get_format (ibfd) == bfd_core \ 4654 && s->vma == 0 && s->lma == 0 \ 4655 && (bfd_vma) s->filepos >= p->p_offset \ 4656 && ((bfd_vma) s->filepos + s->_raw_size \ 4657 <= p->p_offset + p->p_filesz)) 4658 4659 /* The complicated case when p_vaddr is 0 is to handle the Solaris 4660 linker, which generates a PT_INTERP section with p_vaddr and 4661 p_memsz set to 0. */ 4662#define IS_SOLARIS_PT_INTERP(p, s) \ 4663 (p->p_vaddr == 0 \ 4664 && p->p_paddr == 0 \ 4665 && p->p_memsz == 0 \ 4666 && p->p_filesz > 0 \ 4667 && (s->flags & SEC_HAS_CONTENTS) != 0 \ 4668 && s->_raw_size > 0 \ 4669 && (bfd_vma) s->filepos >= p->p_offset \ 4670 && ((bfd_vma) s->filepos + s->_raw_size \ 4671 <= p->p_offset + p->p_filesz)) 4672 4673 /* Decide if the given section should be included in the given segment. 4674 A section will be included if: 4675 1. It is within the address space of the segment -- we use the LMA 4676 if that is set for the segment and the VMA otherwise, 4677 2. It is an allocated segment, 4678 3. There is an output section associated with it, 4679 4. The section has not already been allocated to a previous segment. 4680 5. PT_GNU_STACK segments do not include any sections. 4681 6. PT_TLS segment includes only SHF_TLS sections. 4682 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments. */ 4683#define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \ 4684 ((((segment->p_paddr \ 4685 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \ 4686 : IS_CONTAINED_BY_VMA (section, segment)) \ 4687 && (section->flags & SEC_ALLOC) != 0) \ 4688 || IS_COREFILE_NOTE (segment, section)) \ 4689 && section->output_section != NULL \ 4690 && segment->p_type != PT_GNU_STACK \ 4691 && (segment->p_type != PT_TLS \ 4692 || (section->flags & SEC_THREAD_LOCAL)) \ 4693 && (segment->p_type == PT_LOAD \ 4694 || segment->p_type == PT_TLS \ 4695 || (section->flags & SEC_THREAD_LOCAL) == 0) \ 4696 && ! section->segment_mark) 4697 4698 /* Returns TRUE iff seg1 starts after the end of seg2. */ 4699#define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \ 4700 (seg1->field >= SEGMENT_END (seg2, seg2->field)) 4701 4702 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both 4703 their VMA address ranges and their LMA address ranges overlap. 4704 It is possible to have overlapping VMA ranges without overlapping LMA 4705 ranges. RedBoot images for example can have both .data and .bss mapped 4706 to the same VMA range, but with the .data section mapped to a different 4707 LMA. */ 4708#define SEGMENT_OVERLAPS(seg1, seg2) \ 4709 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \ 4710 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \ 4711 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \ 4712 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr))) 4713 4714 /* Initialise the segment mark field. */ 4715 for (section = ibfd->sections; section != NULL; section = section->next) 4716 section->segment_mark = FALSE; 4717 4718 /* Scan through the segments specified in the program header 4719 of the input BFD. For this first scan we look for overlaps 4720 in the loadable segments. These can be created by weird 4721 parameters to objcopy. Also, fix some solaris weirdness. */ 4722 for (i = 0, segment = elf_tdata (ibfd)->phdr; 4723 i < num_segments; 4724 i++, segment++) 4725 { 4726 unsigned int j; 4727 Elf_Internal_Phdr *segment2; 4728 4729 if (segment->p_type == PT_INTERP) 4730 for (section = ibfd->sections; section; section = section->next) 4731 if (IS_SOLARIS_PT_INTERP (segment, section)) 4732 { 4733 /* Mininal change so that the normal section to segment 4734 assignment code will work. */ 4735 segment->p_vaddr = section->vma; 4736 break; 4737 } 4738 4739 if (segment->p_type != PT_LOAD) 4740 continue; 4741 4742 /* Determine if this segment overlaps any previous segments. */ 4743 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++) 4744 { 4745 bfd_signed_vma extra_length; 4746 4747 if (segment2->p_type != PT_LOAD 4748 || ! SEGMENT_OVERLAPS (segment, segment2)) 4749 continue; 4750 4751 /* Merge the two segments together. */ 4752 if (segment2->p_vaddr < segment->p_vaddr) 4753 { 4754 /* Extend SEGMENT2 to include SEGMENT and then delete 4755 SEGMENT. */ 4756 extra_length = 4757 SEGMENT_END (segment, segment->p_vaddr) 4758 - SEGMENT_END (segment2, segment2->p_vaddr); 4759 4760 if (extra_length > 0) 4761 { 4762 segment2->p_memsz += extra_length; 4763 segment2->p_filesz += extra_length; 4764 } 4765 4766 segment->p_type = PT_NULL; 4767 4768 /* Since we have deleted P we must restart the outer loop. */ 4769 i = 0; 4770 segment = elf_tdata (ibfd)->phdr; 4771 break; 4772 } 4773 else 4774 { 4775 /* Extend SEGMENT to include SEGMENT2 and then delete 4776 SEGMENT2. */ 4777 extra_length = 4778 SEGMENT_END (segment2, segment2->p_vaddr) 4779 - SEGMENT_END (segment, segment->p_vaddr); 4780 4781 if (extra_length > 0) 4782 { 4783 segment->p_memsz += extra_length; 4784 segment->p_filesz += extra_length; 4785 } 4786 4787 segment2->p_type = PT_NULL; 4788 } 4789 } 4790 } 4791 4792 /* The second scan attempts to assign sections to segments. */ 4793 for (i = 0, segment = elf_tdata (ibfd)->phdr; 4794 i < num_segments; 4795 i ++, segment ++) 4796 { 4797 unsigned int section_count; 4798 asection ** sections; 4799 asection * output_section; 4800 unsigned int isec; 4801 bfd_vma matching_lma; 4802 bfd_vma suggested_lma; 4803 unsigned int j; 4804 bfd_size_type amt; 4805 4806 if (segment->p_type == PT_NULL) 4807 continue; 4808 4809 /* Compute how many sections might be placed into this segment. */ 4810 for (section = ibfd->sections, section_count = 0; 4811 section != NULL; 4812 section = section->next) 4813 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed)) 4814 ++section_count; 4815 4816 /* Allocate a segment map big enough to contain 4817 all of the sections we have selected. */ 4818 amt = sizeof (struct elf_segment_map); 4819 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *); 4820 map = bfd_alloc (obfd, amt); 4821 if (map == NULL) 4822 return FALSE; 4823 4824 /* Initialise the fields of the segment map. Default to 4825 using the physical address of the segment in the input BFD. */ 4826 map->next = NULL; 4827 map->p_type = segment->p_type; 4828 map->p_flags = segment->p_flags; 4829 map->p_flags_valid = 1; 4830 map->p_paddr = segment->p_paddr; 4831 map->p_paddr_valid = 1; 4832 4833 /* Determine if this segment contains the ELF file header 4834 and if it contains the program headers themselves. */ 4835 map->includes_filehdr = (segment->p_offset == 0 4836 && segment->p_filesz >= iehdr->e_ehsize); 4837 4838 map->includes_phdrs = 0; 4839 4840 if (! phdr_included || segment->p_type != PT_LOAD) 4841 { 4842 map->includes_phdrs = 4843 (segment->p_offset <= (bfd_vma) iehdr->e_phoff 4844 && (segment->p_offset + segment->p_filesz 4845 >= ((bfd_vma) iehdr->e_phoff 4846 + iehdr->e_phnum * iehdr->e_phentsize))); 4847 4848 if (segment->p_type == PT_LOAD && map->includes_phdrs) 4849 phdr_included = TRUE; 4850 } 4851 4852 if (section_count == 0) 4853 { 4854 /* Special segments, such as the PT_PHDR segment, may contain 4855 no sections, but ordinary, loadable segments should contain 4856 something. They are allowed by the ELF spec however, so only 4857 a warning is produced. */ 4858 if (segment->p_type == PT_LOAD) 4859 (*_bfd_error_handler) 4860 (_("%s: warning: Empty loadable segment detected, is this intentional ?\n"), 4861 bfd_archive_filename (ibfd)); 4862 4863 map->count = 0; 4864 *pointer_to_map = map; 4865 pointer_to_map = &map->next; 4866 4867 continue; 4868 } 4869 4870 /* Now scan the sections in the input BFD again and attempt 4871 to add their corresponding output sections to the segment map. 4872 The problem here is how to handle an output section which has 4873 been moved (ie had its LMA changed). There are four possibilities: 4874 4875 1. None of the sections have been moved. 4876 In this case we can continue to use the segment LMA from the 4877 input BFD. 4878 4879 2. All of the sections have been moved by the same amount. 4880 In this case we can change the segment's LMA to match the LMA 4881 of the first section. 4882 4883 3. Some of the sections have been moved, others have not. 4884 In this case those sections which have not been moved can be 4885 placed in the current segment which will have to have its size, 4886 and possibly its LMA changed, and a new segment or segments will 4887 have to be created to contain the other sections. 4888 4889 4. The sections have been moved, but not by the same amount. 4890 In this case we can change the segment's LMA to match the LMA 4891 of the first section and we will have to create a new segment 4892 or segments to contain the other sections. 4893 4894 In order to save time, we allocate an array to hold the section 4895 pointers that we are interested in. As these sections get assigned 4896 to a segment, they are removed from this array. */ 4897 4898 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here 4899 to work around this long long bug. */ 4900 amt = section_count * sizeof (asection *); 4901 sections = bfd_malloc (amt); 4902 if (sections == NULL) 4903 return FALSE; 4904 4905 /* Step One: Scan for segment vs section LMA conflicts. 4906 Also add the sections to the section array allocated above. 4907 Also add the sections to the current segment. In the common 4908 case, where the sections have not been moved, this means that 4909 we have completely filled the segment, and there is nothing 4910 more to do. */ 4911 isec = 0; 4912 matching_lma = 0; 4913 suggested_lma = 0; 4914 4915 for (j = 0, section = ibfd->sections; 4916 section != NULL; 4917 section = section->next) 4918 { 4919 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed)) 4920 { 4921 output_section = section->output_section; 4922 4923 sections[j ++] = section; 4924 4925 /* The Solaris native linker always sets p_paddr to 0. 4926 We try to catch that case here, and set it to the 4927 correct value. Note - some backends require that 4928 p_paddr be left as zero. */ 4929 if (segment->p_paddr == 0 4930 && segment->p_vaddr != 0 4931 && (! bed->want_p_paddr_set_to_zero) 4932 && isec == 0 4933 && output_section->lma != 0 4934 && (output_section->vma == (segment->p_vaddr 4935 + (map->includes_filehdr 4936 ? iehdr->e_ehsize 4937 : 0) 4938 + (map->includes_phdrs 4939 ? (iehdr->e_phnum 4940 * iehdr->e_phentsize) 4941 : 0)))) 4942 map->p_paddr = segment->p_vaddr; 4943 4944 /* Match up the physical address of the segment with the 4945 LMA address of the output section. */ 4946 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr) 4947 || IS_COREFILE_NOTE (segment, section) 4948 || (bed->want_p_paddr_set_to_zero && 4949 IS_CONTAINED_BY_VMA (output_section, segment)) 4950 ) 4951 { 4952 if (matching_lma == 0) 4953 matching_lma = output_section->lma; 4954 4955 /* We assume that if the section fits within the segment 4956 then it does not overlap any other section within that 4957 segment. */ 4958 map->sections[isec ++] = output_section; 4959 } 4960 else if (suggested_lma == 0) 4961 suggested_lma = output_section->lma; 4962 } 4963 } 4964 4965 BFD_ASSERT (j == section_count); 4966 4967 /* Step Two: Adjust the physical address of the current segment, 4968 if necessary. */ 4969 if (isec == section_count) 4970 { 4971 /* All of the sections fitted within the segment as currently 4972 specified. This is the default case. Add the segment to 4973 the list of built segments and carry on to process the next 4974 program header in the input BFD. */ 4975 map->count = section_count; 4976 *pointer_to_map = map; 4977 pointer_to_map = &map->next; 4978 4979 free (sections); 4980 continue; 4981 } 4982 else 4983 { 4984 if (matching_lma != 0) 4985 { 4986 /* At least one section fits inside the current segment. 4987 Keep it, but modify its physical address to match the 4988 LMA of the first section that fitted. */ 4989 map->p_paddr = matching_lma; 4990 } 4991 else 4992 { 4993 /* None of the sections fitted inside the current segment. 4994 Change the current segment's physical address to match 4995 the LMA of the first section. */ 4996 map->p_paddr = suggested_lma; 4997 } 4998 4999 /* Offset the segment physical address from the lma 5000 to allow for space taken up by elf headers. */ 5001 if (map->includes_filehdr) 5002 map->p_paddr -= iehdr->e_ehsize; 5003 5004 if (map->includes_phdrs) 5005 { 5006 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize; 5007 5008 /* iehdr->e_phnum is just an estimate of the number 5009 of program headers that we will need. Make a note 5010 here of the number we used and the segment we chose 5011 to hold these headers, so that we can adjust the 5012 offset when we know the correct value. */ 5013 phdr_adjust_num = iehdr->e_phnum; 5014 phdr_adjust_seg = map; 5015 } 5016 } 5017 5018 /* Step Three: Loop over the sections again, this time assigning 5019 those that fit to the current segment and removing them from the 5020 sections array; but making sure not to leave large gaps. Once all 5021 possible sections have been assigned to the current segment it is 5022 added to the list of built segments and if sections still remain 5023 to be assigned, a new segment is constructed before repeating 5024 the loop. */ 5025 isec = 0; 5026 do 5027 { 5028 map->count = 0; 5029 suggested_lma = 0; 5030 5031 /* Fill the current segment with sections that fit. */ 5032 for (j = 0; j < section_count; j++) 5033 { 5034 section = sections[j]; 5035 5036 if (section == NULL) 5037 continue; 5038 5039 output_section = section->output_section; 5040 5041 BFD_ASSERT (output_section != NULL); 5042 5043 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr) 5044 || IS_COREFILE_NOTE (segment, section)) 5045 { 5046 if (map->count == 0) 5047 { 5048 /* If the first section in a segment does not start at 5049 the beginning of the segment, then something is 5050 wrong. */ 5051 if (output_section->lma != 5052 (map->p_paddr 5053 + (map->includes_filehdr ? iehdr->e_ehsize : 0) 5054 + (map->includes_phdrs 5055 ? iehdr->e_phnum * iehdr->e_phentsize 5056 : 0))) 5057 abort (); 5058 } 5059 else 5060 { 5061 asection * prev_sec; 5062 5063 prev_sec = map->sections[map->count - 1]; 5064 5065 /* If the gap between the end of the previous section 5066 and the start of this section is more than 5067 maxpagesize then we need to start a new segment. */ 5068 if ((BFD_ALIGN (prev_sec->lma + prev_sec->_raw_size, 5069 maxpagesize) 5070 < BFD_ALIGN (output_section->lma, maxpagesize)) 5071 || ((prev_sec->lma + prev_sec->_raw_size) 5072 > output_section->lma)) 5073 { 5074 if (suggested_lma == 0) 5075 suggested_lma = output_section->lma; 5076 5077 continue; 5078 } 5079 } 5080 5081 map->sections[map->count++] = output_section; 5082 ++isec; 5083 sections[j] = NULL; 5084 section->segment_mark = TRUE; 5085 } 5086 else if (suggested_lma == 0) 5087 suggested_lma = output_section->lma; 5088 } 5089 5090 BFD_ASSERT (map->count > 0); 5091 5092 /* Add the current segment to the list of built segments. */ 5093 *pointer_to_map = map; 5094 pointer_to_map = &map->next; 5095 5096 if (isec < section_count) 5097 { 5098 /* We still have not allocated all of the sections to 5099 segments. Create a new segment here, initialise it 5100 and carry on looping. */ 5101 amt = sizeof (struct elf_segment_map); 5102 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *); 5103 map = bfd_alloc (obfd, amt); 5104 if (map == NULL) 5105 { 5106 free (sections); 5107 return FALSE; 5108 } 5109 5110 /* Initialise the fields of the segment map. Set the physical 5111 physical address to the LMA of the first section that has 5112 not yet been assigned. */ 5113 map->next = NULL; 5114 map->p_type = segment->p_type; 5115 map->p_flags = segment->p_flags; 5116 map->p_flags_valid = 1; 5117 map->p_paddr = suggested_lma; 5118 map->p_paddr_valid = 1; 5119 map->includes_filehdr = 0; 5120 map->includes_phdrs = 0; 5121 } 5122 } 5123 while (isec < section_count); 5124 5125 free (sections); 5126 } 5127 5128 /* The Solaris linker creates program headers in which all the 5129 p_paddr fields are zero. When we try to objcopy or strip such a 5130 file, we get confused. Check for this case, and if we find it 5131 reset the p_paddr_valid fields. */ 5132 for (map = map_first; map != NULL; map = map->next) 5133 if (map->p_paddr != 0) 5134 break; 5135 if (map == NULL) 5136 for (map = map_first; map != NULL; map = map->next) 5137 map->p_paddr_valid = 0; 5138 5139 elf_tdata (obfd)->segment_map = map_first; 5140 5141 /* If we had to estimate the number of program headers that were 5142 going to be needed, then check our estimate now and adjust 5143 the offset if necessary. */ 5144 if (phdr_adjust_seg != NULL) 5145 { 5146 unsigned int count; 5147 5148 for (count = 0, map = map_first; map != NULL; map = map->next) 5149 count++; 5150 5151 if (count > phdr_adjust_num) 5152 phdr_adjust_seg->p_paddr 5153 -= (count - phdr_adjust_num) * iehdr->e_phentsize; 5154 } 5155 5156#if 0 5157 /* Final Step: Sort the segments into ascending order of physical 5158 address. */ 5159 if (map_first != NULL) 5160 { 5161 struct elf_segment_map *prev; 5162 5163 prev = map_first; 5164 for (map = map_first->next; map != NULL; prev = map, map = map->next) 5165 { 5166 /* Yes I know - its a bubble sort.... */ 5167 if (map->next != NULL && (map->next->p_paddr < map->p_paddr)) 5168 { 5169 /* Swap map and map->next. */ 5170 prev->next = map->next; 5171 map->next = map->next->next; 5172 prev->next->next = map; 5173 5174 /* Restart loop. */ 5175 map = map_first; 5176 } 5177 } 5178 } 5179#endif 5180 5181#undef SEGMENT_END 5182#undef SECTION_SIZE 5183#undef IS_CONTAINED_BY_VMA 5184#undef IS_CONTAINED_BY_LMA 5185#undef IS_COREFILE_NOTE 5186#undef IS_SOLARIS_PT_INTERP 5187#undef INCLUDE_SECTION_IN_SEGMENT 5188#undef SEGMENT_AFTER_SEGMENT 5189#undef SEGMENT_OVERLAPS 5190 return TRUE; 5191} 5192 5193/* Copy private section information. This copies over the entsize 5194 field, and sometimes the info field. */ 5195 5196bfd_boolean 5197_bfd_elf_copy_private_section_data (bfd *ibfd, 5198 asection *isec, 5199 bfd *obfd, 5200 asection *osec) 5201{ 5202 Elf_Internal_Shdr *ihdr, *ohdr; 5203 5204 if (ibfd->xvec->flavour != bfd_target_elf_flavour 5205 || obfd->xvec->flavour != bfd_target_elf_flavour) 5206 return TRUE; 5207 5208 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL) 5209 { 5210 asection *s; 5211 5212 /* Only set up the segments if there are no more SEC_ALLOC 5213 sections. FIXME: This won't do the right thing if objcopy is 5214 used to remove the last SEC_ALLOC section, since objcopy 5215 won't call this routine in that case. */ 5216 for (s = isec->next; s != NULL; s = s->next) 5217 if ((s->flags & SEC_ALLOC) != 0) 5218 break; 5219 if (s == NULL) 5220 { 5221 if (! copy_private_bfd_data (ibfd, obfd)) 5222 return FALSE; 5223 } 5224 } 5225 5226 ihdr = &elf_section_data (isec)->this_hdr; 5227 ohdr = &elf_section_data (osec)->this_hdr; 5228 5229 ohdr->sh_entsize = ihdr->sh_entsize; 5230 5231 if (ihdr->sh_type == SHT_SYMTAB 5232 || ihdr->sh_type == SHT_DYNSYM 5233 || ihdr->sh_type == SHT_GNU_verneed 5234 || ihdr->sh_type == SHT_GNU_verdef) 5235 ohdr->sh_info = ihdr->sh_info; 5236 5237 /* Set things up for objcopy. The output SHT_GROUP section will 5238 have its elf_next_in_group pointing back to the input group 5239 members. */ 5240 elf_next_in_group (osec) = elf_next_in_group (isec); 5241 elf_group_name (osec) = elf_group_name (isec); 5242 5243 osec->use_rela_p = isec->use_rela_p; 5244 5245 return TRUE; 5246} 5247 5248/* Copy private symbol information. If this symbol is in a section 5249 which we did not map into a BFD section, try to map the section 5250 index correctly. We use special macro definitions for the mapped 5251 section indices; these definitions are interpreted by the 5252 swap_out_syms function. */ 5253 5254#define MAP_ONESYMTAB (SHN_HIOS + 1) 5255#define MAP_DYNSYMTAB (SHN_HIOS + 2) 5256#define MAP_STRTAB (SHN_HIOS + 3) 5257#define MAP_SHSTRTAB (SHN_HIOS + 4) 5258#define MAP_SYM_SHNDX (SHN_HIOS + 5) 5259 5260bfd_boolean 5261_bfd_elf_copy_private_symbol_data (bfd *ibfd, 5262 asymbol *isymarg, 5263 bfd *obfd, 5264 asymbol *osymarg) 5265{ 5266 elf_symbol_type *isym, *osym; 5267 5268 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 5269 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 5270 return TRUE; 5271 5272 isym = elf_symbol_from (ibfd, isymarg); 5273 osym = elf_symbol_from (obfd, osymarg); 5274 5275 if (isym != NULL 5276 && osym != NULL 5277 && bfd_is_abs_section (isym->symbol.section)) 5278 { 5279 unsigned int shndx; 5280 5281 shndx = isym->internal_elf_sym.st_shndx; 5282 if (shndx == elf_onesymtab (ibfd)) 5283 shndx = MAP_ONESYMTAB; 5284 else if (shndx == elf_dynsymtab (ibfd)) 5285 shndx = MAP_DYNSYMTAB; 5286 else if (shndx == elf_tdata (ibfd)->strtab_section) 5287 shndx = MAP_STRTAB; 5288 else if (shndx == elf_tdata (ibfd)->shstrtab_section) 5289 shndx = MAP_SHSTRTAB; 5290 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section) 5291 shndx = MAP_SYM_SHNDX; 5292 osym->internal_elf_sym.st_shndx = shndx; 5293 } 5294 5295 return TRUE; 5296} 5297 5298/* Swap out the symbols. */ 5299 5300static bfd_boolean 5301swap_out_syms (bfd *abfd, 5302 struct bfd_strtab_hash **sttp, 5303 int relocatable_p) 5304{ 5305 const struct elf_backend_data *bed; 5306 int symcount; 5307 asymbol **syms; 5308 struct bfd_strtab_hash *stt; 5309 Elf_Internal_Shdr *symtab_hdr; 5310 Elf_Internal_Shdr *symtab_shndx_hdr; 5311 Elf_Internal_Shdr *symstrtab_hdr; 5312 char *outbound_syms; 5313 char *outbound_shndx; 5314 int idx; 5315 bfd_size_type amt; 5316 bfd_boolean name_local_sections; 5317 5318 if (!elf_map_symbols (abfd)) 5319 return FALSE; 5320 5321 /* Dump out the symtabs. */ 5322 stt = _bfd_elf_stringtab_init (); 5323 if (stt == NULL) 5324 return FALSE; 5325 5326 bed = get_elf_backend_data (abfd); 5327 symcount = bfd_get_symcount (abfd); 5328 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 5329 symtab_hdr->sh_type = SHT_SYMTAB; 5330 symtab_hdr->sh_entsize = bed->s->sizeof_sym; 5331 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1); 5332 symtab_hdr->sh_info = elf_num_locals (abfd) + 1; 5333 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align; 5334 5335 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; 5336 symstrtab_hdr->sh_type = SHT_STRTAB; 5337 5338 amt = (bfd_size_type) (1 + symcount) * bed->s->sizeof_sym; 5339 outbound_syms = bfd_alloc (abfd, amt); 5340 if (outbound_syms == NULL) 5341 { 5342 _bfd_stringtab_free (stt); 5343 return FALSE; 5344 } 5345 symtab_hdr->contents = outbound_syms; 5346 5347 outbound_shndx = NULL; 5348 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr; 5349 if (symtab_shndx_hdr->sh_name != 0) 5350 { 5351 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx); 5352 outbound_shndx = bfd_zalloc (abfd, amt); 5353 if (outbound_shndx == NULL) 5354 { 5355 _bfd_stringtab_free (stt); 5356 return FALSE; 5357 } 5358 5359 symtab_shndx_hdr->contents = outbound_shndx; 5360 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX; 5361 symtab_shndx_hdr->sh_size = amt; 5362 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx); 5363 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx); 5364 } 5365 5366 /* Now generate the data (for "contents"). */ 5367 { 5368 /* Fill in zeroth symbol and swap it out. */ 5369 Elf_Internal_Sym sym; 5370 sym.st_name = 0; 5371 sym.st_value = 0; 5372 sym.st_size = 0; 5373 sym.st_info = 0; 5374 sym.st_other = 0; 5375 sym.st_shndx = SHN_UNDEF; 5376 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx); 5377 outbound_syms += bed->s->sizeof_sym; 5378 if (outbound_shndx != NULL) 5379 outbound_shndx += sizeof (Elf_External_Sym_Shndx); 5380 } 5381 5382 name_local_sections 5383 = (bed->elf_backend_name_local_section_symbols 5384 && bed->elf_backend_name_local_section_symbols (abfd)); 5385 5386 syms = bfd_get_outsymbols (abfd); 5387 for (idx = 0; idx < symcount; idx++) 5388 { 5389 Elf_Internal_Sym sym; 5390 bfd_vma value = syms[idx]->value; 5391 elf_symbol_type *type_ptr; 5392 flagword flags = syms[idx]->flags; 5393 int type; 5394 5395 if (!name_local_sections 5396 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM) 5397 { 5398 /* Local section symbols have no name. */ 5399 sym.st_name = 0; 5400 } 5401 else 5402 { 5403 sym.st_name = (unsigned long) _bfd_stringtab_add (stt, 5404 syms[idx]->name, 5405 TRUE, FALSE); 5406 if (sym.st_name == (unsigned long) -1) 5407 { 5408 _bfd_stringtab_free (stt); 5409 return FALSE; 5410 } 5411 } 5412 5413 type_ptr = elf_symbol_from (abfd, syms[idx]); 5414 5415 if ((flags & BSF_SECTION_SYM) == 0 5416 && bfd_is_com_section (syms[idx]->section)) 5417 { 5418 /* ELF common symbols put the alignment into the `value' field, 5419 and the size into the `size' field. This is backwards from 5420 how BFD handles it, so reverse it here. */ 5421 sym.st_size = value; 5422 if (type_ptr == NULL 5423 || type_ptr->internal_elf_sym.st_value == 0) 5424 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value)); 5425 else 5426 sym.st_value = type_ptr->internal_elf_sym.st_value; 5427 sym.st_shndx = _bfd_elf_section_from_bfd_section 5428 (abfd, syms[idx]->section); 5429 } 5430 else 5431 { 5432 asection *sec = syms[idx]->section; 5433 int shndx; 5434 5435 if (sec->output_section) 5436 { 5437 value += sec->output_offset; 5438 sec = sec->output_section; 5439 } 5440 5441 /* Don't add in the section vma for relocatable output. */ 5442 if (! relocatable_p) 5443 value += sec->vma; 5444 sym.st_value = value; 5445 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0; 5446 5447 if (bfd_is_abs_section (sec) 5448 && type_ptr != NULL 5449 && type_ptr->internal_elf_sym.st_shndx != 0) 5450 { 5451 /* This symbol is in a real ELF section which we did 5452 not create as a BFD section. Undo the mapping done 5453 by copy_private_symbol_data. */ 5454 shndx = type_ptr->internal_elf_sym.st_shndx; 5455 switch (shndx) 5456 { 5457 case MAP_ONESYMTAB: 5458 shndx = elf_onesymtab (abfd); 5459 break; 5460 case MAP_DYNSYMTAB: 5461 shndx = elf_dynsymtab (abfd); 5462 break; 5463 case MAP_STRTAB: 5464 shndx = elf_tdata (abfd)->strtab_section; 5465 break; 5466 case MAP_SHSTRTAB: 5467 shndx = elf_tdata (abfd)->shstrtab_section; 5468 break; 5469 case MAP_SYM_SHNDX: 5470 shndx = elf_tdata (abfd)->symtab_shndx_section; 5471 break; 5472 default: 5473 break; 5474 } 5475 } 5476 else 5477 { 5478 shndx = _bfd_elf_section_from_bfd_section (abfd, sec); 5479 5480 if (shndx == -1) 5481 { 5482 asection *sec2; 5483 5484 /* Writing this would be a hell of a lot easier if 5485 we had some decent documentation on bfd, and 5486 knew what to expect of the library, and what to 5487 demand of applications. For example, it 5488 appears that `objcopy' might not set the 5489 section of a symbol to be a section that is 5490 actually in the output file. */ 5491 sec2 = bfd_get_section_by_name (abfd, sec->name); 5492 if (sec2 == NULL) 5493 { 5494 _bfd_error_handler (_("\ 5495Unable to find equivalent output section for symbol '%s' from section '%s'"), 5496 syms[idx]->name ? syms[idx]->name : "<Local sym>", 5497 sec->name); 5498 bfd_set_error (bfd_error_invalid_operation); 5499 _bfd_stringtab_free (stt); 5500 return FALSE; 5501 } 5502 5503 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2); 5504 BFD_ASSERT (shndx != -1); 5505 } 5506 } 5507 5508 sym.st_shndx = shndx; 5509 } 5510 5511 if ((flags & BSF_THREAD_LOCAL) != 0) 5512 type = STT_TLS; 5513 else if ((flags & BSF_FUNCTION) != 0) 5514 type = STT_FUNC; 5515 else if ((flags & BSF_OBJECT) != 0) 5516 type = STT_OBJECT; 5517 else 5518 type = STT_NOTYPE; 5519 5520 if (syms[idx]->section->flags & SEC_THREAD_LOCAL) 5521 type = STT_TLS; 5522 5523 /* Processor-specific types. */ 5524 if (type_ptr != NULL 5525 && bed->elf_backend_get_symbol_type) 5526 type = ((*bed->elf_backend_get_symbol_type) 5527 (&type_ptr->internal_elf_sym, type)); 5528 5529 if (flags & BSF_SECTION_SYM) 5530 { 5531 if (flags & BSF_GLOBAL) 5532 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); 5533 else 5534 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); 5535 } 5536 else if (bfd_is_com_section (syms[idx]->section)) 5537 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type); 5538 else if (bfd_is_und_section (syms[idx]->section)) 5539 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK) 5540 ? STB_WEAK 5541 : STB_GLOBAL), 5542 type); 5543 else if (flags & BSF_FILE) 5544 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); 5545 else 5546 { 5547 int bind = STB_LOCAL; 5548 5549 if (flags & BSF_LOCAL) 5550 bind = STB_LOCAL; 5551 else if (flags & BSF_WEAK) 5552 bind = STB_WEAK; 5553 else if (flags & BSF_GLOBAL) 5554 bind = STB_GLOBAL; 5555 5556 sym.st_info = ELF_ST_INFO (bind, type); 5557 } 5558 5559 if (type_ptr != NULL) 5560 sym.st_other = type_ptr->internal_elf_sym.st_other; 5561 else 5562 sym.st_other = 0; 5563 5564 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx); 5565 outbound_syms += bed->s->sizeof_sym; 5566 if (outbound_shndx != NULL) 5567 outbound_shndx += sizeof (Elf_External_Sym_Shndx); 5568 } 5569 5570 *sttp = stt; 5571 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt); 5572 symstrtab_hdr->sh_type = SHT_STRTAB; 5573 5574 symstrtab_hdr->sh_flags = 0; 5575 symstrtab_hdr->sh_addr = 0; 5576 symstrtab_hdr->sh_entsize = 0; 5577 symstrtab_hdr->sh_link = 0; 5578 symstrtab_hdr->sh_info = 0; 5579 symstrtab_hdr->sh_addralign = 1; 5580 5581 return TRUE; 5582} 5583 5584/* Return the number of bytes required to hold the symtab vector. 5585 5586 Note that we base it on the count plus 1, since we will null terminate 5587 the vector allocated based on this size. However, the ELF symbol table 5588 always has a dummy entry as symbol #0, so it ends up even. */ 5589 5590long 5591_bfd_elf_get_symtab_upper_bound (bfd *abfd) 5592{ 5593 long symcount; 5594 long symtab_size; 5595 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr; 5596 5597 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; 5598 symtab_size = (symcount + 1) * (sizeof (asymbol *)); 5599 if (symcount > 0) 5600 symtab_size -= sizeof (asymbol *); 5601 5602 return symtab_size; 5603} 5604 5605long 5606_bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd) 5607{ 5608 long symcount; 5609 long symtab_size; 5610 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr; 5611 5612 if (elf_dynsymtab (abfd) == 0) 5613 { 5614 bfd_set_error (bfd_error_invalid_operation); 5615 return -1; 5616 } 5617 5618 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; 5619 symtab_size = (symcount + 1) * (sizeof (asymbol *)); 5620 if (symcount > 0) 5621 symtab_size -= sizeof (asymbol *); 5622 5623 return symtab_size; 5624} 5625 5626long 5627_bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED, 5628 sec_ptr asect) 5629{ 5630 return (asect->reloc_count + 1) * sizeof (arelent *); 5631} 5632 5633/* Canonicalize the relocs. */ 5634 5635long 5636_bfd_elf_canonicalize_reloc (bfd *abfd, 5637 sec_ptr section, 5638 arelent **relptr, 5639 asymbol **symbols) 5640{ 5641 arelent *tblptr; 5642 unsigned int i; 5643 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 5644 5645 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE)) 5646 return -1; 5647 5648 tblptr = section->relocation; 5649 for (i = 0; i < section->reloc_count; i++) 5650 *relptr++ = tblptr++; 5651 5652 *relptr = NULL; 5653 5654 return section->reloc_count; 5655} 5656 5657long 5658_bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation) 5659{ 5660 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 5661 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE); 5662 5663 if (symcount >= 0) 5664 bfd_get_symcount (abfd) = symcount; 5665 return symcount; 5666} 5667 5668long 5669_bfd_elf_canonicalize_dynamic_symtab (bfd *abfd, 5670 asymbol **allocation) 5671{ 5672 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 5673 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE); 5674 5675 if (symcount >= 0) 5676 bfd_get_dynamic_symcount (abfd) = symcount; 5677 return symcount; 5678} 5679 5680/* Return the size required for the dynamic reloc entries. Any 5681 section that was actually installed in the BFD, and has type 5682 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is 5683 considered to be a dynamic reloc section. */ 5684 5685long 5686_bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd) 5687{ 5688 long ret; 5689 asection *s; 5690 5691 if (elf_dynsymtab (abfd) == 0) 5692 { 5693 bfd_set_error (bfd_error_invalid_operation); 5694 return -1; 5695 } 5696 5697 ret = sizeof (arelent *); 5698 for (s = abfd->sections; s != NULL; s = s->next) 5699 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd) 5700 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL 5701 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA)) 5702 ret += ((s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize) 5703 * sizeof (arelent *)); 5704 5705 return ret; 5706} 5707 5708/* Canonicalize the dynamic relocation entries. Note that we return 5709 the dynamic relocations as a single block, although they are 5710 actually associated with particular sections; the interface, which 5711 was designed for SunOS style shared libraries, expects that there 5712 is only one set of dynamic relocs. Any section that was actually 5713 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses 5714 the dynamic symbol table, is considered to be a dynamic reloc 5715 section. */ 5716 5717long 5718_bfd_elf_canonicalize_dynamic_reloc (bfd *abfd, 5719 arelent **storage, 5720 asymbol **syms) 5721{ 5722 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); 5723 asection *s; 5724 long ret; 5725 5726 if (elf_dynsymtab (abfd) == 0) 5727 { 5728 bfd_set_error (bfd_error_invalid_operation); 5729 return -1; 5730 } 5731 5732 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; 5733 ret = 0; 5734 for (s = abfd->sections; s != NULL; s = s->next) 5735 { 5736 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd) 5737 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL 5738 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA)) 5739 { 5740 arelent *p; 5741 long count, i; 5742 5743 if (! (*slurp_relocs) (abfd, s, syms, TRUE)) 5744 return -1; 5745 count = s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize; 5746 p = s->relocation; 5747 for (i = 0; i < count; i++) 5748 *storage++ = p++; 5749 ret += count; 5750 } 5751 } 5752 5753 *storage = NULL; 5754 5755 return ret; 5756} 5757 5758/* Read in the version information. */ 5759 5760bfd_boolean 5761_bfd_elf_slurp_version_tables (bfd *abfd) 5762{ 5763 bfd_byte *contents = NULL; 5764 bfd_size_type amt; 5765 5766 if (elf_dynverdef (abfd) != 0) 5767 { 5768 Elf_Internal_Shdr *hdr; 5769 Elf_External_Verdef *everdef; 5770 Elf_Internal_Verdef *iverdef; 5771 Elf_Internal_Verdef *iverdefarr; 5772 Elf_Internal_Verdef iverdefmem; 5773 unsigned int i; 5774 unsigned int maxidx; 5775 5776 hdr = &elf_tdata (abfd)->dynverdef_hdr; 5777 5778 contents = bfd_malloc (hdr->sh_size); 5779 if (contents == NULL) 5780 goto error_return; 5781 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0 5782 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size) 5783 goto error_return; 5784 5785 /* We know the number of entries in the section but not the maximum 5786 index. Therefore we have to run through all entries and find 5787 the maximum. */ 5788 everdef = (Elf_External_Verdef *) contents; 5789 maxidx = 0; 5790 for (i = 0; i < hdr->sh_info; ++i) 5791 { 5792 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem); 5793 5794 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx) 5795 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION); 5796 5797 everdef = ((Elf_External_Verdef *) 5798 ((bfd_byte *) everdef + iverdefmem.vd_next)); 5799 } 5800 5801 amt = (bfd_size_type) maxidx * sizeof (Elf_Internal_Verdef); 5802 elf_tdata (abfd)->verdef = bfd_zalloc (abfd, amt); 5803 if (elf_tdata (abfd)->verdef == NULL) 5804 goto error_return; 5805 5806 elf_tdata (abfd)->cverdefs = maxidx; 5807 5808 everdef = (Elf_External_Verdef *) contents; 5809 iverdefarr = elf_tdata (abfd)->verdef; 5810 for (i = 0; i < hdr->sh_info; i++) 5811 { 5812 Elf_External_Verdaux *everdaux; 5813 Elf_Internal_Verdaux *iverdaux; 5814 unsigned int j; 5815 5816 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem); 5817 5818 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1]; 5819 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef)); 5820 5821 iverdef->vd_bfd = abfd; 5822 5823 amt = (bfd_size_type) iverdef->vd_cnt * sizeof (Elf_Internal_Verdaux); 5824 iverdef->vd_auxptr = bfd_alloc (abfd, amt); 5825 if (iverdef->vd_auxptr == NULL) 5826 goto error_return; 5827 5828 everdaux = ((Elf_External_Verdaux *) 5829 ((bfd_byte *) everdef + iverdef->vd_aux)); 5830 iverdaux = iverdef->vd_auxptr; 5831 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++) 5832 { 5833 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux); 5834 5835 iverdaux->vda_nodename = 5836 bfd_elf_string_from_elf_section (abfd, hdr->sh_link, 5837 iverdaux->vda_name); 5838 if (iverdaux->vda_nodename == NULL) 5839 goto error_return; 5840 5841 if (j + 1 < iverdef->vd_cnt) 5842 iverdaux->vda_nextptr = iverdaux + 1; 5843 else 5844 iverdaux->vda_nextptr = NULL; 5845 5846 everdaux = ((Elf_External_Verdaux *) 5847 ((bfd_byte *) everdaux + iverdaux->vda_next)); 5848 } 5849 5850 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename; 5851 5852 if (i + 1 < hdr->sh_info) 5853 iverdef->vd_nextdef = iverdef + 1; 5854 else 5855 iverdef->vd_nextdef = NULL; 5856 5857 everdef = ((Elf_External_Verdef *) 5858 ((bfd_byte *) everdef + iverdef->vd_next)); 5859 } 5860 5861 free (contents); 5862 contents = NULL; 5863 } 5864 5865 if (elf_dynverref (abfd) != 0) 5866 { 5867 Elf_Internal_Shdr *hdr; 5868 Elf_External_Verneed *everneed; 5869 Elf_Internal_Verneed *iverneed; 5870 unsigned int i; 5871 5872 hdr = &elf_tdata (abfd)->dynverref_hdr; 5873 5874 amt = (bfd_size_type) hdr->sh_info * sizeof (Elf_Internal_Verneed); 5875 elf_tdata (abfd)->verref = bfd_zalloc (abfd, amt); 5876 if (elf_tdata (abfd)->verref == NULL) 5877 goto error_return; 5878 5879 elf_tdata (abfd)->cverrefs = hdr->sh_info; 5880 5881 contents = bfd_malloc (hdr->sh_size); 5882 if (contents == NULL) 5883 goto error_return; 5884 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0 5885 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size) 5886 goto error_return; 5887 5888 everneed = (Elf_External_Verneed *) contents; 5889 iverneed = elf_tdata (abfd)->verref; 5890 for (i = 0; i < hdr->sh_info; i++, iverneed++) 5891 { 5892 Elf_External_Vernaux *evernaux; 5893 Elf_Internal_Vernaux *ivernaux; 5894 unsigned int j; 5895 5896 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed); 5897 5898 iverneed->vn_bfd = abfd; 5899 5900 iverneed->vn_filename = 5901 bfd_elf_string_from_elf_section (abfd, hdr->sh_link, 5902 iverneed->vn_file); 5903 if (iverneed->vn_filename == NULL) 5904 goto error_return; 5905 5906 amt = iverneed->vn_cnt; 5907 amt *= sizeof (Elf_Internal_Vernaux); 5908 iverneed->vn_auxptr = bfd_alloc (abfd, amt); 5909 5910 evernaux = ((Elf_External_Vernaux *) 5911 ((bfd_byte *) everneed + iverneed->vn_aux)); 5912 ivernaux = iverneed->vn_auxptr; 5913 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++) 5914 { 5915 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux); 5916 5917 ivernaux->vna_nodename = 5918 bfd_elf_string_from_elf_section (abfd, hdr->sh_link, 5919 ivernaux->vna_name); 5920 if (ivernaux->vna_nodename == NULL) 5921 goto error_return; 5922 5923 if (j + 1 < iverneed->vn_cnt) 5924 ivernaux->vna_nextptr = ivernaux + 1; 5925 else 5926 ivernaux->vna_nextptr = NULL; 5927 5928 evernaux = ((Elf_External_Vernaux *) 5929 ((bfd_byte *) evernaux + ivernaux->vna_next)); 5930 } 5931 5932 if (i + 1 < hdr->sh_info) 5933 iverneed->vn_nextref = iverneed + 1; 5934 else 5935 iverneed->vn_nextref = NULL; 5936 5937 everneed = ((Elf_External_Verneed *) 5938 ((bfd_byte *) everneed + iverneed->vn_next)); 5939 } 5940 5941 free (contents); 5942 contents = NULL; 5943 } 5944 5945 return TRUE; 5946 5947 error_return: 5948 if (contents != NULL) 5949 free (contents); 5950 return FALSE; 5951} 5952 5953asymbol * 5954_bfd_elf_make_empty_symbol (bfd *abfd) 5955{ 5956 elf_symbol_type *newsym; 5957 bfd_size_type amt = sizeof (elf_symbol_type); 5958 5959 newsym = bfd_zalloc (abfd, amt); 5960 if (!newsym) 5961 return NULL; 5962 else 5963 { 5964 newsym->symbol.the_bfd = abfd; 5965 return &newsym->symbol; 5966 } 5967} 5968 5969void 5970_bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED, 5971 asymbol *symbol, 5972 symbol_info *ret) 5973{ 5974 bfd_symbol_info (symbol, ret); 5975} 5976 5977/* Return whether a symbol name implies a local symbol. Most targets 5978 use this function for the is_local_label_name entry point, but some 5979 override it. */ 5980 5981bfd_boolean 5982_bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, 5983 const char *name) 5984{ 5985 /* Normal local symbols start with ``.L''. */ 5986 if (name[0] == '.' && name[1] == 'L') 5987 return TRUE; 5988 5989 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate 5990 DWARF debugging symbols starting with ``..''. */ 5991 if (name[0] == '.' && name[1] == '.') 5992 return TRUE; 5993 5994 /* gcc will sometimes generate symbols beginning with ``_.L_'' when 5995 emitting DWARF debugging output. I suspect this is actually a 5996 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call 5997 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading 5998 underscore to be emitted on some ELF targets). For ease of use, 5999 we treat such symbols as local. */ 6000 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_') 6001 return TRUE; 6002 6003 return FALSE; 6004} 6005 6006alent * 6007_bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED, 6008 asymbol *symbol ATTRIBUTE_UNUSED) 6009{ 6010 abort (); 6011 return NULL; 6012} 6013 6014bfd_boolean 6015_bfd_elf_set_arch_mach (bfd *abfd, 6016 enum bfd_architecture arch, 6017 unsigned long machine) 6018{ 6019 /* If this isn't the right architecture for this backend, and this 6020 isn't the generic backend, fail. */ 6021 if (arch != get_elf_backend_data (abfd)->arch 6022 && arch != bfd_arch_unknown 6023 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown) 6024 return FALSE; 6025 6026 return bfd_default_set_arch_mach (abfd, arch, machine); 6027} 6028 6029/* Find the function to a particular section and offset, 6030 for error reporting. */ 6031 6032static bfd_boolean 6033elf_find_function (bfd *abfd ATTRIBUTE_UNUSED, 6034 asection *section, 6035 asymbol **symbols, 6036 bfd_vma offset, 6037 const char **filename_ptr, 6038 const char **functionname_ptr) 6039{ 6040 const char *filename; 6041 asymbol *func; 6042 bfd_vma low_func; 6043 asymbol **p; 6044 6045 filename = NULL; 6046 func = NULL; 6047 low_func = 0; 6048 6049 for (p = symbols; *p != NULL; p++) 6050 { 6051 elf_symbol_type *q; 6052 6053 q = (elf_symbol_type *) *p; 6054 6055 if (bfd_get_section (&q->symbol) != section) 6056 continue; 6057 6058 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) 6059 { 6060 default: 6061 break; 6062 case STT_FILE: 6063 filename = bfd_asymbol_name (&q->symbol); 6064 break; 6065 case STT_NOTYPE: 6066 case STT_FUNC: 6067 if (q->symbol.section == section 6068 && q->symbol.value >= low_func 6069 && q->symbol.value <= offset) 6070 { 6071 func = (asymbol *) q; 6072 low_func = q->symbol.value; 6073 } 6074 break; 6075 } 6076 } 6077 6078 if (func == NULL) 6079 return FALSE; 6080 6081 if (filename_ptr) 6082 *filename_ptr = filename; 6083 if (functionname_ptr) 6084 *functionname_ptr = bfd_asymbol_name (func); 6085 6086 return TRUE; 6087} 6088 6089/* Find the nearest line to a particular section and offset, 6090 for error reporting. */ 6091 6092bfd_boolean 6093_bfd_elf_find_nearest_line (bfd *abfd, 6094 asection *section, 6095 asymbol **symbols, 6096 bfd_vma offset, 6097 const char **filename_ptr, 6098 const char **functionname_ptr, 6099 unsigned int *line_ptr) 6100{ 6101 bfd_boolean found; 6102 6103 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset, 6104 filename_ptr, functionname_ptr, 6105 line_ptr)) 6106 { 6107 if (!*functionname_ptr) 6108 elf_find_function (abfd, section, symbols, offset, 6109 *filename_ptr ? NULL : filename_ptr, 6110 functionname_ptr); 6111 6112 return TRUE; 6113 } 6114 6115 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, 6116 filename_ptr, functionname_ptr, 6117 line_ptr, 0, 6118 &elf_tdata (abfd)->dwarf2_find_line_info)) 6119 { 6120 if (!*functionname_ptr) 6121 elf_find_function (abfd, section, symbols, offset, 6122 *filename_ptr ? NULL : filename_ptr, 6123 functionname_ptr); 6124 6125 return TRUE; 6126 } 6127 6128 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, 6129 &found, filename_ptr, 6130 functionname_ptr, line_ptr, 6131 &elf_tdata (abfd)->line_info)) 6132 return FALSE; 6133 if (found && (*functionname_ptr || *line_ptr)) 6134 return TRUE; 6135 6136 if (symbols == NULL) 6137 return FALSE; 6138 6139 if (! elf_find_function (abfd, section, symbols, offset, 6140 filename_ptr, functionname_ptr)) 6141 return FALSE; 6142 6143 *line_ptr = 0; 6144 return TRUE; 6145} 6146 6147int 6148_bfd_elf_sizeof_headers (bfd *abfd, bfd_boolean reloc) 6149{ 6150 int ret; 6151 6152 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr; 6153 if (! reloc) 6154 ret += get_program_header_size (abfd); 6155 return ret; 6156} 6157 6158bfd_boolean 6159_bfd_elf_set_section_contents (bfd *abfd, 6160 sec_ptr section, 6161 const void *location, 6162 file_ptr offset, 6163 bfd_size_type count) 6164{ 6165 Elf_Internal_Shdr *hdr; 6166 bfd_signed_vma pos; 6167 6168 if (! abfd->output_has_begun 6169 && ! _bfd_elf_compute_section_file_positions (abfd, NULL)) 6170 return FALSE; 6171 6172 hdr = &elf_section_data (section)->this_hdr; 6173 pos = hdr->sh_offset + offset; 6174 if (bfd_seek (abfd, pos, SEEK_SET) != 0 6175 || bfd_bwrite (location, count, abfd) != count) 6176 return FALSE; 6177 6178 return TRUE; 6179} 6180 6181void 6182_bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 6183 arelent *cache_ptr ATTRIBUTE_UNUSED, 6184 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED) 6185{ 6186 abort (); 6187} 6188 6189/* Try to convert a non-ELF reloc into an ELF one. */ 6190 6191bfd_boolean 6192_bfd_elf_validate_reloc (bfd *abfd, arelent *areloc) 6193{ 6194 /* Check whether we really have an ELF howto. */ 6195 6196 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec) 6197 { 6198 bfd_reloc_code_real_type code; 6199 reloc_howto_type *howto; 6200 6201 /* Alien reloc: Try to determine its type to replace it with an 6202 equivalent ELF reloc. */ 6203 6204 if (areloc->howto->pc_relative) 6205 { 6206 switch (areloc->howto->bitsize) 6207 { 6208 case 8: 6209 code = BFD_RELOC_8_PCREL; 6210 break; 6211 case 12: 6212 code = BFD_RELOC_12_PCREL; 6213 break; 6214 case 16: 6215 code = BFD_RELOC_16_PCREL; 6216 break; 6217 case 24: 6218 code = BFD_RELOC_24_PCREL; 6219 break; 6220 case 32: 6221 code = BFD_RELOC_32_PCREL; 6222 break; 6223 case 64: 6224 code = BFD_RELOC_64_PCREL; 6225 break; 6226 default: 6227 goto fail; 6228 } 6229 6230 howto = bfd_reloc_type_lookup (abfd, code); 6231 6232 if (areloc->howto->pcrel_offset != howto->pcrel_offset) 6233 { 6234 if (howto->pcrel_offset) 6235 areloc->addend += areloc->address; 6236 else 6237 areloc->addend -= areloc->address; /* addend is unsigned!! */ 6238 } 6239 } 6240 else 6241 { 6242 switch (areloc->howto->bitsize) 6243 { 6244 case 8: 6245 code = BFD_RELOC_8; 6246 break; 6247 case 14: 6248 code = BFD_RELOC_14; 6249 break; 6250 case 16: 6251 code = BFD_RELOC_16; 6252 break; 6253 case 26: 6254 code = BFD_RELOC_26; 6255 break; 6256 case 32: 6257 code = BFD_RELOC_32; 6258 break; 6259 case 64: 6260 code = BFD_RELOC_64; 6261 break; 6262 default: 6263 goto fail; 6264 } 6265 6266 howto = bfd_reloc_type_lookup (abfd, code); 6267 } 6268 6269 if (howto) 6270 areloc->howto = howto; 6271 else 6272 goto fail; 6273 } 6274 6275 return TRUE; 6276 6277 fail: 6278 (*_bfd_error_handler) 6279 (_("%s: unsupported relocation type %s"), 6280 bfd_archive_filename (abfd), areloc->howto->name); 6281 bfd_set_error (bfd_error_bad_value); 6282 return FALSE; 6283} 6284 6285bfd_boolean 6286_bfd_elf_close_and_cleanup (bfd *abfd) 6287{ 6288 if (bfd_get_format (abfd) == bfd_object) 6289 { 6290 if (elf_shstrtab (abfd) != NULL) 6291 _bfd_elf_strtab_free (elf_shstrtab (abfd)); 6292 } 6293 6294 return _bfd_generic_close_and_cleanup (abfd); 6295} 6296 6297/* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY 6298 in the relocation's offset. Thus we cannot allow any sort of sanity 6299 range-checking to interfere. There is nothing else to do in processing 6300 this reloc. */ 6301 6302bfd_reloc_status_type 6303_bfd_elf_rel_vtable_reloc_fn 6304 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED, 6305 struct bfd_symbol *symbol ATTRIBUTE_UNUSED, 6306 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED, 6307 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED) 6308{ 6309 return bfd_reloc_ok; 6310} 6311 6312/* Elf core file support. Much of this only works on native 6313 toolchains, since we rely on knowing the 6314 machine-dependent procfs structure in order to pick 6315 out details about the corefile. */ 6316 6317#ifdef HAVE_SYS_PROCFS_H 6318# include <sys/procfs.h> 6319#endif 6320 6321/* FIXME: this is kinda wrong, but it's what gdb wants. */ 6322 6323static int 6324elfcore_make_pid (bfd *abfd) 6325{ 6326 return ((elf_tdata (abfd)->core_lwpid << 16) 6327 + (elf_tdata (abfd)->core_pid)); 6328} 6329 6330/* If there isn't a section called NAME, make one, using 6331 data from SECT. Note, this function will generate a 6332 reference to NAME, so you shouldn't deallocate or 6333 overwrite it. */ 6334 6335static bfd_boolean 6336elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect) 6337{ 6338 asection *sect2; 6339 6340 if (bfd_get_section_by_name (abfd, name) != NULL) 6341 return TRUE; 6342 6343 sect2 = bfd_make_section (abfd, name); 6344 if (sect2 == NULL) 6345 return FALSE; 6346 6347 sect2->_raw_size = sect->_raw_size; 6348 sect2->filepos = sect->filepos; 6349 sect2->flags = sect->flags; 6350 sect2->alignment_power = sect->alignment_power; 6351 return TRUE; 6352} 6353 6354/* Create a pseudosection containing SIZE bytes at FILEPOS. This 6355 actually creates up to two pseudosections: 6356 - For the single-threaded case, a section named NAME, unless 6357 such a section already exists. 6358 - For the multi-threaded case, a section named "NAME/PID", where 6359 PID is elfcore_make_pid (abfd). 6360 Both pseudosections have identical contents. */ 6361bfd_boolean 6362_bfd_elfcore_make_pseudosection (bfd *abfd, 6363 char *name, 6364 size_t size, 6365 ufile_ptr filepos) 6366{ 6367 char buf[100]; 6368 char *threaded_name; 6369 size_t len; 6370 asection *sect; 6371 6372 /* Build the section name. */ 6373 6374 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd)); 6375 len = strlen (buf) + 1; 6376 threaded_name = bfd_alloc (abfd, len); 6377 if (threaded_name == NULL) 6378 return FALSE; 6379 memcpy (threaded_name, buf, len); 6380 6381 sect = bfd_make_section_anyway (abfd, threaded_name); 6382 if (sect == NULL) 6383 return FALSE; 6384 sect->_raw_size = size; 6385 sect->filepos = filepos; 6386 sect->flags = SEC_HAS_CONTENTS; 6387 sect->alignment_power = 2; 6388 6389 return elfcore_maybe_make_sect (abfd, name, sect); 6390} 6391 6392/* prstatus_t exists on: 6393 solaris 2.5+ 6394 linux 2.[01] + glibc 6395 unixware 4.2 6396*/ 6397 6398#if defined (HAVE_PRSTATUS_T) 6399 6400static bfd_boolean 6401elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 6402{ 6403 size_t raw_size; 6404 int offset; 6405 6406 if (note->descsz == sizeof (prstatus_t)) 6407 { 6408 prstatus_t prstat; 6409 6410 raw_size = sizeof (prstat.pr_reg); 6411 offset = offsetof (prstatus_t, pr_reg); 6412 memcpy (&prstat, note->descdata, sizeof (prstat)); 6413 6414 /* Do not overwrite the core signal if it 6415 has already been set by another thread. */ 6416 if (elf_tdata (abfd)->core_signal == 0) 6417 elf_tdata (abfd)->core_signal = prstat.pr_cursig; 6418 elf_tdata (abfd)->core_pid = prstat.pr_pid; 6419 6420 /* pr_who exists on: 6421 solaris 2.5+ 6422 unixware 4.2 6423 pr_who doesn't exist on: 6424 linux 2.[01] 6425 */ 6426#if defined (HAVE_PRSTATUS_T_PR_WHO) 6427 elf_tdata (abfd)->core_lwpid = prstat.pr_who; 6428#endif 6429 } 6430#if defined (HAVE_PRSTATUS32_T) 6431 else if (note->descsz == sizeof (prstatus32_t)) 6432 { 6433 /* 64-bit host, 32-bit corefile */ 6434 prstatus32_t prstat; 6435 6436 raw_size = sizeof (prstat.pr_reg); 6437 offset = offsetof (prstatus32_t, pr_reg); 6438 memcpy (&prstat, note->descdata, sizeof (prstat)); 6439 6440 /* Do not overwrite the core signal if it 6441 has already been set by another thread. */ 6442 if (elf_tdata (abfd)->core_signal == 0) 6443 elf_tdata (abfd)->core_signal = prstat.pr_cursig; 6444 elf_tdata (abfd)->core_pid = prstat.pr_pid; 6445 6446 /* pr_who exists on: 6447 solaris 2.5+ 6448 unixware 4.2 6449 pr_who doesn't exist on: 6450 linux 2.[01] 6451 */ 6452#if defined (HAVE_PRSTATUS32_T_PR_WHO) 6453 elf_tdata (abfd)->core_lwpid = prstat.pr_who; 6454#endif 6455 } 6456#endif /* HAVE_PRSTATUS32_T */ 6457 else 6458 { 6459 /* Fail - we don't know how to handle any other 6460 note size (ie. data object type). */ 6461 return TRUE; 6462 } 6463 6464 /* Make a ".reg/999" section and a ".reg" section. */ 6465 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 6466 raw_size, note->descpos + offset); 6467} 6468#endif /* defined (HAVE_PRSTATUS_T) */ 6469 6470/* Create a pseudosection containing the exact contents of NOTE. */ 6471static bfd_boolean 6472elfcore_make_note_pseudosection (bfd *abfd, 6473 char *name, 6474 Elf_Internal_Note *note) 6475{ 6476 return _bfd_elfcore_make_pseudosection (abfd, name, 6477 note->descsz, note->descpos); 6478} 6479 6480/* There isn't a consistent prfpregset_t across platforms, 6481 but it doesn't matter, because we don't have to pick this 6482 data structure apart. */ 6483 6484static bfd_boolean 6485elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note) 6486{ 6487 return elfcore_make_note_pseudosection (abfd, ".reg2", note); 6488} 6489 6490/* Linux dumps the Intel SSE regs in a note named "LINUX" with a note 6491 type of 5 (NT_PRXFPREG). Just include the whole note's contents 6492 literally. */ 6493 6494static bfd_boolean 6495elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note) 6496{ 6497 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note); 6498} 6499 6500#if defined (HAVE_PRPSINFO_T) 6501typedef prpsinfo_t elfcore_psinfo_t; 6502#if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */ 6503typedef prpsinfo32_t elfcore_psinfo32_t; 6504#endif 6505#endif 6506 6507#if defined (HAVE_PSINFO_T) 6508typedef psinfo_t elfcore_psinfo_t; 6509#if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */ 6510typedef psinfo32_t elfcore_psinfo32_t; 6511#endif 6512#endif 6513 6514/* return a malloc'ed copy of a string at START which is at 6515 most MAX bytes long, possibly without a terminating '\0'. 6516 the copy will always have a terminating '\0'. */ 6517 6518char * 6519_bfd_elfcore_strndup (bfd *abfd, char *start, size_t max) 6520{ 6521 char *dups; 6522 char *end = memchr (start, '\0', max); 6523 size_t len; 6524 6525 if (end == NULL) 6526 len = max; 6527 else 6528 len = end - start; 6529 6530 dups = bfd_alloc (abfd, len + 1); 6531 if (dups == NULL) 6532 return NULL; 6533 6534 memcpy (dups, start, len); 6535 dups[len] = '\0'; 6536 6537 return dups; 6538} 6539 6540#if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) 6541static bfd_boolean 6542elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 6543{ 6544 if (note->descsz == sizeof (elfcore_psinfo_t)) 6545 { 6546 elfcore_psinfo_t psinfo; 6547 6548 memcpy (&psinfo, note->descdata, sizeof (psinfo)); 6549 6550 elf_tdata (abfd)->core_program 6551 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname, 6552 sizeof (psinfo.pr_fname)); 6553 6554 elf_tdata (abfd)->core_command 6555 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs, 6556 sizeof (psinfo.pr_psargs)); 6557 } 6558#if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T) 6559 else if (note->descsz == sizeof (elfcore_psinfo32_t)) 6560 { 6561 /* 64-bit host, 32-bit corefile */ 6562 elfcore_psinfo32_t psinfo; 6563 6564 memcpy (&psinfo, note->descdata, sizeof (psinfo)); 6565 6566 elf_tdata (abfd)->core_program 6567 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname, 6568 sizeof (psinfo.pr_fname)); 6569 6570 elf_tdata (abfd)->core_command 6571 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs, 6572 sizeof (psinfo.pr_psargs)); 6573 } 6574#endif 6575 6576 else 6577 { 6578 /* Fail - we don't know how to handle any other 6579 note size (ie. data object type). */ 6580 return TRUE; 6581 } 6582 6583 /* Note that for some reason, a spurious space is tacked 6584 onto the end of the args in some (at least one anyway) 6585 implementations, so strip it off if it exists. */ 6586 6587 { 6588 char *command = elf_tdata (abfd)->core_command; 6589 int n = strlen (command); 6590 6591 if (0 < n && command[n - 1] == ' ') 6592 command[n - 1] = '\0'; 6593 } 6594 6595 return TRUE; 6596} 6597#endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */ 6598 6599#if defined (HAVE_PSTATUS_T) 6600static bfd_boolean 6601elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note) 6602{ 6603 if (note->descsz == sizeof (pstatus_t) 6604#if defined (HAVE_PXSTATUS_T) 6605 || note->descsz == sizeof (pxstatus_t) 6606#endif 6607 ) 6608 { 6609 pstatus_t pstat; 6610 6611 memcpy (&pstat, note->descdata, sizeof (pstat)); 6612 6613 elf_tdata (abfd)->core_pid = pstat.pr_pid; 6614 } 6615#if defined (HAVE_PSTATUS32_T) 6616 else if (note->descsz == sizeof (pstatus32_t)) 6617 { 6618 /* 64-bit host, 32-bit corefile */ 6619 pstatus32_t pstat; 6620 6621 memcpy (&pstat, note->descdata, sizeof (pstat)); 6622 6623 elf_tdata (abfd)->core_pid = pstat.pr_pid; 6624 } 6625#endif 6626 /* Could grab some more details from the "representative" 6627 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an 6628 NT_LWPSTATUS note, presumably. */ 6629 6630 return TRUE; 6631} 6632#endif /* defined (HAVE_PSTATUS_T) */ 6633 6634#if defined (HAVE_LWPSTATUS_T) 6635static bfd_boolean 6636elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note) 6637{ 6638 lwpstatus_t lwpstat; 6639 char buf[100]; 6640 char *name; 6641 size_t len; 6642 asection *sect; 6643 6644 if (note->descsz != sizeof (lwpstat) 6645#if defined (HAVE_LWPXSTATUS_T) 6646 && note->descsz != sizeof (lwpxstatus_t) 6647#endif 6648 ) 6649 return TRUE; 6650 6651 memcpy (&lwpstat, note->descdata, sizeof (lwpstat)); 6652 6653 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid; 6654 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig; 6655 6656 /* Make a ".reg/999" section. */ 6657 6658 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd)); 6659 len = strlen (buf) + 1; 6660 name = bfd_alloc (abfd, len); 6661 if (name == NULL) 6662 return FALSE; 6663 memcpy (name, buf, len); 6664 6665 sect = bfd_make_section_anyway (abfd, name); 6666 if (sect == NULL) 6667 return FALSE; 6668 6669#if defined (HAVE_LWPSTATUS_T_PR_CONTEXT) 6670 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.gregs); 6671 sect->filepos = note->descpos 6672 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs); 6673#endif 6674 6675#if defined (HAVE_LWPSTATUS_T_PR_REG) 6676 sect->_raw_size = sizeof (lwpstat.pr_reg); 6677 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg); 6678#endif 6679 6680 sect->flags = SEC_HAS_CONTENTS; 6681 sect->alignment_power = 2; 6682 6683 if (!elfcore_maybe_make_sect (abfd, ".reg", sect)) 6684 return FALSE; 6685 6686 /* Make a ".reg2/999" section */ 6687 6688 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd)); 6689 len = strlen (buf) + 1; 6690 name = bfd_alloc (abfd, len); 6691 if (name == NULL) 6692 return FALSE; 6693 memcpy (name, buf, len); 6694 6695 sect = bfd_make_section_anyway (abfd, name); 6696 if (sect == NULL) 6697 return FALSE; 6698 6699#if defined (HAVE_LWPSTATUS_T_PR_CONTEXT) 6700 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs); 6701 sect->filepos = note->descpos 6702 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs); 6703#endif 6704 6705#if defined (HAVE_LWPSTATUS_T_PR_FPREG) 6706 sect->_raw_size = sizeof (lwpstat.pr_fpreg); 6707 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg); 6708#endif 6709 6710 sect->flags = SEC_HAS_CONTENTS; 6711 sect->alignment_power = 2; 6712 6713 return elfcore_maybe_make_sect (abfd, ".reg2", sect); 6714} 6715#endif /* defined (HAVE_LWPSTATUS_T) */ 6716 6717#if defined (HAVE_WIN32_PSTATUS_T) 6718static bfd_boolean 6719elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note) 6720{ 6721 char buf[30]; 6722 char *name; 6723 size_t len; 6724 asection *sect; 6725 win32_pstatus_t pstatus; 6726 6727 if (note->descsz < sizeof (pstatus)) 6728 return TRUE; 6729 6730 memcpy (&pstatus, note->descdata, sizeof (pstatus)); 6731 6732 switch (pstatus.data_type) 6733 { 6734 case NOTE_INFO_PROCESS: 6735 /* FIXME: need to add ->core_command. */ 6736 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal; 6737 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid; 6738 break; 6739 6740 case NOTE_INFO_THREAD: 6741 /* Make a ".reg/999" section. */ 6742 sprintf (buf, ".reg/%d", pstatus.data.thread_info.tid); 6743 6744 len = strlen (buf) + 1; 6745 name = bfd_alloc (abfd, len); 6746 if (name == NULL) 6747 return FALSE; 6748 6749 memcpy (name, buf, len); 6750 6751 sect = bfd_make_section_anyway (abfd, name); 6752 if (sect == NULL) 6753 return FALSE; 6754 6755 sect->_raw_size = sizeof (pstatus.data.thread_info.thread_context); 6756 sect->filepos = (note->descpos 6757 + offsetof (struct win32_pstatus, 6758 data.thread_info.thread_context)); 6759 sect->flags = SEC_HAS_CONTENTS; 6760 sect->alignment_power = 2; 6761 6762 if (pstatus.data.thread_info.is_active_thread) 6763 if (! elfcore_maybe_make_sect (abfd, ".reg", sect)) 6764 return FALSE; 6765 break; 6766 6767 case NOTE_INFO_MODULE: 6768 /* Make a ".module/xxxxxxxx" section. */ 6769 sprintf (buf, ".module/%08x", pstatus.data.module_info.base_address); 6770 6771 len = strlen (buf) + 1; 6772 name = bfd_alloc (abfd, len); 6773 if (name == NULL) 6774 return FALSE; 6775 6776 memcpy (name, buf, len); 6777 6778 sect = bfd_make_section_anyway (abfd, name); 6779 6780 if (sect == NULL) 6781 return FALSE; 6782 6783 sect->_raw_size = note->descsz; 6784 sect->filepos = note->descpos; 6785 sect->flags = SEC_HAS_CONTENTS; 6786 sect->alignment_power = 2; 6787 break; 6788 6789 default: 6790 return TRUE; 6791 } 6792 6793 return TRUE; 6794} 6795#endif /* HAVE_WIN32_PSTATUS_T */ 6796 6797static bfd_boolean 6798elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note) 6799{ 6800 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 6801 6802 switch (note->type) 6803 { 6804 default: 6805 return TRUE; 6806 6807 case NT_PRSTATUS: 6808 if (bed->elf_backend_grok_prstatus) 6809 if ((*bed->elf_backend_grok_prstatus) (abfd, note)) 6810 return TRUE; 6811#if defined (HAVE_PRSTATUS_T) 6812 return elfcore_grok_prstatus (abfd, note); 6813#else 6814 return TRUE; 6815#endif 6816 6817#if defined (HAVE_PSTATUS_T) 6818 case NT_PSTATUS: 6819 return elfcore_grok_pstatus (abfd, note); 6820#endif 6821 6822#if defined (HAVE_LWPSTATUS_T) 6823 case NT_LWPSTATUS: 6824 return elfcore_grok_lwpstatus (abfd, note); 6825#endif 6826 6827 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */ 6828 return elfcore_grok_prfpreg (abfd, note); 6829 6830#if defined (HAVE_WIN32_PSTATUS_T) 6831 case NT_WIN32PSTATUS: 6832 return elfcore_grok_win32pstatus (abfd, note); 6833#endif 6834 6835 case NT_PRXFPREG: /* Linux SSE extension */ 6836 if (note->namesz == 6 6837 && strcmp (note->namedata, "LINUX") == 0) 6838 return elfcore_grok_prxfpreg (abfd, note); 6839 else 6840 return TRUE; 6841 6842 case NT_PRPSINFO: 6843 case NT_PSINFO: 6844 if (bed->elf_backend_grok_psinfo) 6845 if ((*bed->elf_backend_grok_psinfo) (abfd, note)) 6846 return TRUE; 6847#if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) 6848 return elfcore_grok_psinfo (abfd, note); 6849#else 6850 return TRUE; 6851#endif 6852 6853 case NT_AUXV: 6854 { 6855 asection *sect = bfd_make_section_anyway (abfd, ".auxv"); 6856 6857 if (sect == NULL) 6858 return FALSE; 6859 sect->_raw_size = note->descsz; 6860 sect->filepos = note->descpos; 6861 sect->flags = SEC_HAS_CONTENTS; 6862 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32; 6863 6864 return TRUE; 6865 } 6866 } 6867} 6868 6869static bfd_boolean 6870elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp) 6871{ 6872 char *cp; 6873 6874 cp = strchr (note->namedata, '@'); 6875 if (cp != NULL) 6876 { 6877 *lwpidp = atoi(cp + 1); 6878 return TRUE; 6879 } 6880 return FALSE; 6881} 6882 6883static bfd_boolean 6884elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note) 6885{ 6886 6887 /* Signal number at offset 0x08. */ 6888 elf_tdata (abfd)->core_signal 6889 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08); 6890 6891 /* Process ID at offset 0x50. */ 6892 elf_tdata (abfd)->core_pid 6893 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50); 6894 6895 /* Command name at 0x7c (max 32 bytes, including nul). */ 6896 elf_tdata (abfd)->core_command 6897 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31); 6898 6899 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo", 6900 note); 6901} 6902 6903static bfd_boolean 6904elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note) 6905{ 6906 int lwp; 6907 6908 if (elfcore_netbsd_get_lwpid (note, &lwp)) 6909 elf_tdata (abfd)->core_lwpid = lwp; 6910 6911 if (note->type == NT_NETBSDCORE_PROCINFO) 6912 { 6913 /* NetBSD-specific core "procinfo". Note that we expect to 6914 find this note before any of the others, which is fine, 6915 since the kernel writes this note out first when it 6916 creates a core file. */ 6917 6918 return elfcore_grok_netbsd_procinfo (abfd, note); 6919 } 6920 6921 /* As of Jan 2002 there are no other machine-independent notes 6922 defined for NetBSD core files. If the note type is less 6923 than the start of the machine-dependent note types, we don't 6924 understand it. */ 6925 6926 if (note->type < NT_NETBSDCORE_FIRSTMACH) 6927 return TRUE; 6928 6929 6930 switch (bfd_get_arch (abfd)) 6931 { 6932 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and 6933 PT_GETFPREGS == mach+2. */ 6934 6935 case bfd_arch_alpha: 6936 case bfd_arch_sparc: 6937 switch (note->type) 6938 { 6939 case NT_NETBSDCORE_FIRSTMACH+0: 6940 return elfcore_make_note_pseudosection (abfd, ".reg", note); 6941 6942 case NT_NETBSDCORE_FIRSTMACH+2: 6943 return elfcore_make_note_pseudosection (abfd, ".reg2", note); 6944 6945 default: 6946 return TRUE; 6947 } 6948 6949 /* On all other arch's, PT_GETREGS == mach+1 and 6950 PT_GETFPREGS == mach+3. */ 6951 6952 default: 6953 switch (note->type) 6954 { 6955 case NT_NETBSDCORE_FIRSTMACH+1: 6956 return elfcore_make_note_pseudosection (abfd, ".reg", note); 6957 6958 case NT_NETBSDCORE_FIRSTMACH+3: 6959 return elfcore_make_note_pseudosection (abfd, ".reg2", note); 6960 6961 default: 6962 return TRUE; 6963 } 6964 } 6965 /* NOTREACHED */ 6966} 6967 6968static bfd_boolean 6969elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, pid_t *tid) 6970{ 6971 void *ddata = note->descdata; 6972 char buf[100]; 6973 char *name; 6974 asection *sect; 6975 short sig; 6976 unsigned flags; 6977 6978 /* nto_procfs_status 'pid' field is at offset 0. */ 6979 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata); 6980 6981 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */ 6982 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4); 6983 6984 /* nto_procfs_status 'flags' field is at offset 8. */ 6985 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8); 6986 6987 /* nto_procfs_status 'what' field is at offset 14. */ 6988 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0) 6989 { 6990 elf_tdata (abfd)->core_signal = sig; 6991 elf_tdata (abfd)->core_lwpid = *tid; 6992 } 6993 6994 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores 6995 do not come from signals so we make sure we set the current 6996 thread just in case. */ 6997 if (flags & 0x00000080) 6998 elf_tdata (abfd)->core_lwpid = *tid; 6999 7000 /* Make a ".qnx_core_status/%d" section. */ 7001 sprintf (buf, ".qnx_core_status/%d", *tid); 7002 7003 name = bfd_alloc (abfd, strlen (buf) + 1); 7004 if (name == NULL) 7005 return FALSE; 7006 strcpy (name, buf); 7007 7008 sect = bfd_make_section_anyway (abfd, name); 7009 if (sect == NULL) 7010 return FALSE; 7011 7012 sect->_raw_size = note->descsz; 7013 sect->filepos = note->descpos; 7014 sect->flags = SEC_HAS_CONTENTS; 7015 sect->alignment_power = 2; 7016 7017 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect)); 7018} 7019 7020static bfd_boolean 7021elfcore_grok_nto_gregs (bfd *abfd, Elf_Internal_Note *note, pid_t tid) 7022{ 7023 char buf[100]; 7024 char *name; 7025 asection *sect; 7026 7027 /* Make a ".reg/%d" section. */ 7028 sprintf (buf, ".reg/%d", tid); 7029 7030 name = bfd_alloc (abfd, strlen (buf) + 1); 7031 if (name == NULL) 7032 return FALSE; 7033 strcpy (name, buf); 7034 7035 sect = bfd_make_section_anyway (abfd, name); 7036 if (sect == NULL) 7037 return FALSE; 7038 7039 sect->_raw_size = note->descsz; 7040 sect->filepos = note->descpos; 7041 sect->flags = SEC_HAS_CONTENTS; 7042 sect->alignment_power = 2; 7043 7044 /* This is the current thread. */ 7045 if (elf_tdata (abfd)->core_lwpid == tid) 7046 return elfcore_maybe_make_sect (abfd, ".reg", sect); 7047 7048 return TRUE; 7049} 7050 7051#define BFD_QNT_CORE_INFO 7 7052#define BFD_QNT_CORE_STATUS 8 7053#define BFD_QNT_CORE_GREG 9 7054#define BFD_QNT_CORE_FPREG 10 7055 7056static bfd_boolean 7057elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note) 7058{ 7059 /* Every GREG section has a STATUS section before it. Store the 7060 tid from the previous call to pass down to the next gregs 7061 function. */ 7062 static pid_t tid = 1; 7063 7064 switch (note->type) 7065 { 7066 case BFD_QNT_CORE_INFO: return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note); 7067 case BFD_QNT_CORE_STATUS: return elfcore_grok_nto_status (abfd, note, &tid); 7068 case BFD_QNT_CORE_GREG: return elfcore_grok_nto_gregs (abfd, note, tid); 7069 case BFD_QNT_CORE_FPREG: return elfcore_grok_prfpreg (abfd, note); 7070 default: return TRUE; 7071 } 7072} 7073 7074/* Function: elfcore_write_note 7075 7076 Inputs: 7077 buffer to hold note 7078 name of note 7079 type of note 7080 data for note 7081 size of data for note 7082 7083 Return: 7084 End of buffer containing note. */ 7085 7086char * 7087elfcore_write_note (bfd *abfd, 7088 char *buf, 7089 int *bufsiz, 7090 const char *name, 7091 int type, 7092 const void *input, 7093 int size) 7094{ 7095 Elf_External_Note *xnp; 7096 size_t namesz; 7097 size_t pad; 7098 size_t newspace; 7099 char *p, *dest; 7100 7101 namesz = 0; 7102 pad = 0; 7103 if (name != NULL) 7104 { 7105 const struct elf_backend_data *bed; 7106 7107 namesz = strlen (name) + 1; 7108 bed = get_elf_backend_data (abfd); 7109 pad = -namesz & ((1 << bed->s->log_file_align) - 1); 7110 } 7111 7112 newspace = 12 + namesz + pad + size; 7113 7114 p = realloc (buf, *bufsiz + newspace); 7115 dest = p + *bufsiz; 7116 *bufsiz += newspace; 7117 xnp = (Elf_External_Note *) dest; 7118 H_PUT_32 (abfd, namesz, xnp->namesz); 7119 H_PUT_32 (abfd, size, xnp->descsz); 7120 H_PUT_32 (abfd, type, xnp->type); 7121 dest = xnp->name; 7122 if (name != NULL) 7123 { 7124 memcpy (dest, name, namesz); 7125 dest += namesz; 7126 while (pad != 0) 7127 { 7128 *dest++ = '\0'; 7129 --pad; 7130 } 7131 } 7132 memcpy (dest, input, size); 7133 return p; 7134} 7135 7136#if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) 7137char * 7138elfcore_write_prpsinfo (bfd *abfd, 7139 char *buf, 7140 int *bufsiz, 7141 const char *fname, 7142 const char *psargs) 7143{ 7144 int note_type; 7145 char *note_name = "CORE"; 7146 7147#if defined (HAVE_PSINFO_T) 7148 psinfo_t data; 7149 note_type = NT_PSINFO; 7150#else 7151 prpsinfo_t data; 7152 note_type = NT_PRPSINFO; 7153#endif 7154 7155 memset (&data, 0, sizeof (data)); 7156 strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); 7157 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); 7158 return elfcore_write_note (abfd, buf, bufsiz, 7159 note_name, note_type, &data, sizeof (data)); 7160} 7161#endif /* PSINFO_T or PRPSINFO_T */ 7162 7163#if defined (HAVE_PRSTATUS_T) 7164char * 7165elfcore_write_prstatus (bfd *abfd, 7166 char *buf, 7167 int *bufsiz, 7168 long pid, 7169 int cursig, 7170 const void *gregs) 7171{ 7172 prstatus_t prstat; 7173 char *note_name = "CORE"; 7174 7175 memset (&prstat, 0, sizeof (prstat)); 7176 prstat.pr_pid = pid; 7177 prstat.pr_cursig = cursig; 7178 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); 7179 return elfcore_write_note (abfd, buf, bufsiz, 7180 note_name, NT_PRSTATUS, &prstat, sizeof (prstat)); 7181} 7182#endif /* HAVE_PRSTATUS_T */ 7183 7184#if defined (HAVE_LWPSTATUS_T) 7185char * 7186elfcore_write_lwpstatus (bfd *abfd, 7187 char *buf, 7188 int *bufsiz, 7189 long pid, 7190 int cursig, 7191 const void *gregs) 7192{ 7193 lwpstatus_t lwpstat; 7194 char *note_name = "CORE"; 7195 7196 memset (&lwpstat, 0, sizeof (lwpstat)); 7197 lwpstat.pr_lwpid = pid >> 16; 7198 lwpstat.pr_cursig = cursig; 7199#if defined (HAVE_LWPSTATUS_T_PR_REG) 7200 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg)); 7201#elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT) 7202#if !defined(gregs) 7203 memcpy (lwpstat.pr_context.uc_mcontext.gregs, 7204 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs)); 7205#else 7206 memcpy (lwpstat.pr_context.uc_mcontext.__gregs, 7207 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs)); 7208#endif 7209#endif 7210 return elfcore_write_note (abfd, buf, bufsiz, note_name, 7211 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat)); 7212} 7213#endif /* HAVE_LWPSTATUS_T */ 7214 7215#if defined (HAVE_PSTATUS_T) 7216char * 7217elfcore_write_pstatus (bfd *abfd, 7218 char *buf, 7219 int *bufsiz, 7220 long pid, 7221 int cursig, 7222 const void *gregs) 7223{ 7224 pstatus_t pstat; 7225 char *note_name = "CORE"; 7226 7227 memset (&pstat, 0, sizeof (pstat)); 7228 pstat.pr_pid = pid & 0xffff; 7229 buf = elfcore_write_note (abfd, buf, bufsiz, note_name, 7230 NT_PSTATUS, &pstat, sizeof (pstat)); 7231 return buf; 7232} 7233#endif /* HAVE_PSTATUS_T */ 7234 7235char * 7236elfcore_write_prfpreg (bfd *abfd, 7237 char *buf, 7238 int *bufsiz, 7239 const void *fpregs, 7240 int size) 7241{ 7242 char *note_name = "CORE"; 7243 return elfcore_write_note (abfd, buf, bufsiz, 7244 note_name, NT_FPREGSET, fpregs, size); 7245} 7246 7247char * 7248elfcore_write_prxfpreg (bfd *abfd, 7249 char *buf, 7250 int *bufsiz, 7251 const void *xfpregs, 7252 int size) 7253{ 7254 char *note_name = "LINUX"; 7255 return elfcore_write_note (abfd, buf, bufsiz, 7256 note_name, NT_PRXFPREG, xfpregs, size); 7257} 7258 7259static bfd_boolean 7260elfcore_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size) 7261{ 7262 char *buf; 7263 char *p; 7264 7265 if (size <= 0) 7266 return TRUE; 7267 7268 if (bfd_seek (abfd, offset, SEEK_SET) != 0) 7269 return FALSE; 7270 7271 buf = bfd_malloc (size); 7272 if (buf == NULL) 7273 return FALSE; 7274 7275 if (bfd_bread (buf, size, abfd) != size) 7276 { 7277 error: 7278 free (buf); 7279 return FALSE; 7280 } 7281 7282 p = buf; 7283 while (p < buf + size) 7284 { 7285 /* FIXME: bad alignment assumption. */ 7286 Elf_External_Note *xnp = (Elf_External_Note *) p; 7287 Elf_Internal_Note in; 7288 7289 in.type = H_GET_32 (abfd, xnp->type); 7290 7291 in.namesz = H_GET_32 (abfd, xnp->namesz); 7292 in.namedata = xnp->name; 7293 7294 in.descsz = H_GET_32 (abfd, xnp->descsz); 7295 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4); 7296 in.descpos = offset + (in.descdata - buf); 7297 7298 if (strncmp (in.namedata, "NetBSD-CORE", 11) == 0) 7299 { 7300 if (! elfcore_grok_netbsd_note (abfd, &in)) 7301 goto error; 7302 } 7303 else if (strncmp (in.namedata, "QNX", 3) == 0) 7304 { 7305 if (! elfcore_grok_nto_note (abfd, &in)) 7306 goto error; 7307 } 7308 else 7309 { 7310 if (! elfcore_grok_note (abfd, &in)) 7311 goto error; 7312 } 7313 7314 p = in.descdata + BFD_ALIGN (in.descsz, 4); 7315 } 7316 7317 free (buf); 7318 return TRUE; 7319} 7320 7321/* Providing external access to the ELF program header table. */ 7322 7323/* Return an upper bound on the number of bytes required to store a 7324 copy of ABFD's program header table entries. Return -1 if an error 7325 occurs; bfd_get_error will return an appropriate code. */ 7326 7327long 7328bfd_get_elf_phdr_upper_bound (bfd *abfd) 7329{ 7330 if (abfd->xvec->flavour != bfd_target_elf_flavour) 7331 { 7332 bfd_set_error (bfd_error_wrong_format); 7333 return -1; 7334 } 7335 7336 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr); 7337} 7338 7339/* Copy ABFD's program header table entries to *PHDRS. The entries 7340 will be stored as an array of Elf_Internal_Phdr structures, as 7341 defined in include/elf/internal.h. To find out how large the 7342 buffer needs to be, call bfd_get_elf_phdr_upper_bound. 7343 7344 Return the number of program header table entries read, or -1 if an 7345 error occurs; bfd_get_error will return an appropriate code. */ 7346 7347int 7348bfd_get_elf_phdrs (bfd *abfd, void *phdrs) 7349{ 7350 int num_phdrs; 7351 7352 if (abfd->xvec->flavour != bfd_target_elf_flavour) 7353 { 7354 bfd_set_error (bfd_error_wrong_format); 7355 return -1; 7356 } 7357 7358 num_phdrs = elf_elfheader (abfd)->e_phnum; 7359 memcpy (phdrs, elf_tdata (abfd)->phdr, 7360 num_phdrs * sizeof (Elf_Internal_Phdr)); 7361 7362 return num_phdrs; 7363} 7364 7365void 7366_bfd_elf_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value) 7367{ 7368#ifdef BFD64 7369 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ 7370 7371 i_ehdrp = elf_elfheader (abfd); 7372 if (i_ehdrp == NULL) 7373 sprintf_vma (buf, value); 7374 else 7375 { 7376 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64) 7377 { 7378#if BFD_HOST_64BIT_LONG 7379 sprintf (buf, "%016lx", value); 7380#else 7381 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value), 7382 _bfd_int64_low (value)); 7383#endif 7384 } 7385 else 7386 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff)); 7387 } 7388#else 7389 sprintf_vma (buf, value); 7390#endif 7391} 7392 7393void 7394_bfd_elf_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value) 7395{ 7396#ifdef BFD64 7397 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ 7398 7399 i_ehdrp = elf_elfheader (abfd); 7400 if (i_ehdrp == NULL) 7401 fprintf_vma ((FILE *) stream, value); 7402 else 7403 { 7404 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64) 7405 { 7406#if BFD_HOST_64BIT_LONG 7407 fprintf ((FILE *) stream, "%016lx", value); 7408#else 7409 fprintf ((FILE *) stream, "%08lx%08lx", 7410 _bfd_int64_high (value), _bfd_int64_low (value)); 7411#endif 7412 } 7413 else 7414 fprintf ((FILE *) stream, "%08lx", 7415 (unsigned long) (value & 0xffffffff)); 7416 } 7417#else 7418 fprintf_vma ((FILE *) stream, value); 7419#endif 7420} 7421 7422enum elf_reloc_type_class 7423_bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED) 7424{ 7425 return reloc_class_normal; 7426} 7427 7428/* For RELA architectures, return the relocation value for a 7429 relocation against a local symbol. */ 7430 7431bfd_vma 7432_bfd_elf_rela_local_sym (bfd *abfd, 7433 Elf_Internal_Sym *sym, 7434 asection **psec, 7435 Elf_Internal_Rela *rel) 7436{ 7437 asection *sec = *psec; 7438 bfd_vma relocation; 7439 7440 relocation = (sec->output_section->vma 7441 + sec->output_offset 7442 + sym->st_value); 7443 if ((sec->flags & SEC_MERGE) 7444 && ELF_ST_TYPE (sym->st_info) == STT_SECTION 7445 && sec->sec_info_type == ELF_INFO_TYPE_MERGE) 7446 { 7447 rel->r_addend = 7448 _bfd_merged_section_offset (abfd, psec, 7449 elf_section_data (sec)->sec_info, 7450 sym->st_value + rel->r_addend, 7451 0); 7452 sec = *psec; 7453 rel->r_addend -= relocation; 7454 rel->r_addend += sec->output_section->vma + sec->output_offset; 7455 } 7456 return relocation; 7457} 7458 7459bfd_vma 7460_bfd_elf_rel_local_sym (bfd *abfd, 7461 Elf_Internal_Sym *sym, 7462 asection **psec, 7463 bfd_vma addend) 7464{ 7465 asection *sec = *psec; 7466 7467 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE) 7468 return sym->st_value + addend; 7469 7470 return _bfd_merged_section_offset (abfd, psec, 7471 elf_section_data (sec)->sec_info, 7472 sym->st_value + addend, 0); 7473} 7474 7475bfd_vma 7476_bfd_elf_section_offset (bfd *abfd, 7477 struct bfd_link_info *info, 7478 asection *sec, 7479 bfd_vma offset) 7480{ 7481 struct bfd_elf_section_data *sec_data; 7482 7483 sec_data = elf_section_data (sec); 7484 switch (sec->sec_info_type) 7485 { 7486 case ELF_INFO_TYPE_STABS: 7487 return _bfd_stab_section_offset (abfd, 7488 &elf_hash_table (info)->merge_info, 7489 sec, &sec_data->sec_info, offset); 7490 case ELF_INFO_TYPE_EH_FRAME: 7491 return _bfd_elf_eh_frame_section_offset (abfd, sec, offset); 7492 default: 7493 return offset; 7494 } 7495} 7496 7497/* Create a new BFD as if by bfd_openr. Rather than opening a file, 7498 reconstruct an ELF file by reading the segments out of remote memory 7499 based on the ELF file header at EHDR_VMA and the ELF program headers it 7500 points to. If not null, *LOADBASEP is filled in with the difference 7501 between the VMAs from which the segments were read, and the VMAs the 7502 file headers (and hence BFD's idea of each section's VMA) put them at. 7503 7504 The function TARGET_READ_MEMORY is called to copy LEN bytes from the 7505 remote memory at target address VMA into the local buffer at MYADDR; it 7506 should return zero on success or an `errno' code on failure. TEMPL must 7507 be a BFD for an ELF target with the word size and byte order found in 7508 the remote memory. */ 7509 7510bfd * 7511bfd_elf_bfd_from_remote_memory 7512 (bfd *templ, 7513 bfd_vma ehdr_vma, 7514 bfd_vma *loadbasep, 7515 int (*target_read_memory) (bfd_vma, char *, int)) 7516{ 7517 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory) 7518 (templ, ehdr_vma, loadbasep, target_read_memory); 7519} 7520