1/* VAX series support for 32-bit ELF 2 Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 3 2004 Free Software Foundation, Inc. 4 Contributed by Matt Thomas <matt@3am-software.com>. 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#include "bfd.h" 23#include "sysdep.h" 24#include "bfdlink.h" 25#include "libbfd.h" 26#include "elf-bfd.h" 27#include "elf/vax.h" 28 29static reloc_howto_type *reloc_type_lookup 30 PARAMS ((bfd *, bfd_reloc_code_real_type)); 31static void rtype_to_howto 32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); 33static struct bfd_hash_entry *elf_vax_link_hash_newfunc 34 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); 35static struct bfd_link_hash_table *elf_vax_link_hash_table_create 36 PARAMS ((bfd *)); 37static bfd_boolean elf_vax_check_relocs 38 PARAMS ((bfd *, struct bfd_link_info *, asection *, 39 const Elf_Internal_Rela *)); 40static asection *elf_vax_gc_mark_hook 41 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, 42 struct elf_link_hash_entry *, Elf_Internal_Sym *)); 43static bfd_boolean elf_vax_gc_sweep_hook 44 PARAMS ((bfd *, struct bfd_link_info *, asection *, 45 const Elf_Internal_Rela *)); 46static bfd_boolean elf_vax_adjust_dynamic_symbol 47 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); 48static bfd_boolean elf_vax_size_dynamic_sections 49 PARAMS ((bfd *, struct bfd_link_info *)); 50static bfd_boolean elf_vax_relocate_section 51 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, 52 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); 53static bfd_boolean elf_vax_finish_dynamic_symbol 54 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, 55 Elf_Internal_Sym *)); 56static bfd_boolean elf_vax_finish_dynamic_sections 57 PARAMS ((bfd *, struct bfd_link_info *)); 58 59static bfd_boolean elf32_vax_set_private_flags 60 PARAMS ((bfd *, flagword)); 61static bfd_boolean elf32_vax_merge_private_bfd_data 62 PARAMS ((bfd *, bfd *)); 63static bfd_boolean elf32_vax_print_private_bfd_data 64 PARAMS ((bfd *, PTR)); 65 66static reloc_howto_type howto_table[] = { 67 HOWTO (R_VAX_NONE, /* type */ 68 0, /* rightshift */ 69 0, /* size (0 = byte, 1 = short, 2 = long) */ 70 0, /* bitsize */ 71 FALSE, /* pc_relative */ 72 0, /* bitpos */ 73 complain_overflow_dont, /* complain_on_overflow */ 74 bfd_elf_generic_reloc, /* special_function */ 75 "R_VAX_NONE", /* name */ 76 FALSE, /* partial_inplace */ 77 0, /* src_mask */ 78 0x00000000, /* dst_mask */ 79 FALSE), /* pcrel_offset */ 80 81 HOWTO (R_VAX_32, /* type */ 82 0, /* rightshift */ 83 2, /* size (0 = byte, 1 = short, 2 = long) */ 84 32, /* bitsize */ 85 FALSE, /* pc_relative */ 86 0, /* bitpos */ 87 complain_overflow_bitfield, /* complain_on_overflow */ 88 bfd_elf_generic_reloc, /* special_function */ 89 "R_VAX_32", /* name */ 90 FALSE, /* partial_inplace */ 91 0, /* src_mask */ 92 0xffffffff, /* dst_mask */ 93 FALSE), /* pcrel_offset */ 94 95 HOWTO (R_VAX_16, /* type */ 96 0, /* rightshift */ 97 1, /* size (0 = byte, 1 = short, 2 = long) */ 98 16, /* bitsize */ 99 FALSE, /* pc_relative */ 100 0, /* bitpos */ 101 complain_overflow_bitfield, /* complain_on_overflow */ 102 bfd_elf_generic_reloc, /* special_function */ 103 "R_VAX_16", /* name */ 104 FALSE, /* partial_inplace */ 105 0, /* src_mask */ 106 0x0000ffff, /* dst_mask */ 107 FALSE), /* pcrel_offset */ 108 109 HOWTO (R_VAX_8, /* type */ 110 0, /* rightshift */ 111 0, /* size (0 = byte, 1 = short, 2 = long) */ 112 8, /* bitsize */ 113 FALSE, /* pc_relative */ 114 0, /* bitpos */ 115 complain_overflow_bitfield, /* complain_on_overflow */ 116 bfd_elf_generic_reloc, /* special_function */ 117 "R_VAX_8", /* name */ 118 FALSE, /* partial_inplace */ 119 0, /* src_mask */ 120 0x000000ff, /* dst_mask */ 121 FALSE), /* pcrel_offset */ 122 123 HOWTO (R_VAX_PC32, /* type */ 124 0, /* rightshift */ 125 2, /* size (0 = byte, 1 = short, 2 = long) */ 126 32, /* bitsize */ 127 TRUE, /* pc_relative */ 128 0, /* bitpos */ 129 complain_overflow_bitfield, /* complain_on_overflow */ 130 bfd_elf_generic_reloc, /* special_function */ 131 "R_VAX_PC32", /* name */ 132 FALSE, /* partial_inplace */ 133 0, /* src_mask */ 134 0xffffffff, /* dst_mask */ 135 TRUE), /* pcrel_offset */ 136 137 HOWTO (R_VAX_PC16, /* type */ 138 0, /* rightshift */ 139 1, /* size (0 = byte, 1 = short, 2 = long) */ 140 16, /* bitsize */ 141 TRUE, /* pc_relative */ 142 0, /* bitpos */ 143 complain_overflow_signed, /* complain_on_overflow */ 144 bfd_elf_generic_reloc, /* special_function */ 145 "R_VAX_PC16", /* name */ 146 FALSE, /* partial_inplace */ 147 0, /* src_mask */ 148 0x0000ffff, /* dst_mask */ 149 TRUE), /* pcrel_offset */ 150 151 HOWTO (R_VAX_PC8, /* type */ 152 0, /* rightshift */ 153 0, /* size (0 = byte, 1 = short, 2 = long) */ 154 8, /* bitsize */ 155 TRUE, /* pc_relative */ 156 0, /* bitpos */ 157 complain_overflow_signed, /* complain_on_overflow */ 158 bfd_elf_generic_reloc, /* special_function */ 159 "R_VAX_PC8", /* name */ 160 FALSE, /* partial_inplace */ 161 0, /* src_mask */ 162 0x000000ff, /* dst_mask */ 163 TRUE), /* pcrel_offset */ 164 165 HOWTO (R_VAX_GOT32, /* type */ 166 0, /* rightshift */ 167 2, /* size (0 = byte, 1 = short, 2 = long) */ 168 32, /* bitsize */ 169 TRUE, /* pc_relative */ 170 0, /* bitpos */ 171 complain_overflow_bitfield, /* complain_on_overflow */ 172 bfd_elf_generic_reloc, /* special_function */ 173 "R_VAX_GOT32", /* name */ 174 FALSE, /* partial_inplace */ 175 0, /* src_mask */ 176 0xffffffff, /* dst_mask */ 177 TRUE), /* pcrel_offset */ 178 179 EMPTY_HOWTO (-1), 180 EMPTY_HOWTO (-1), 181 EMPTY_HOWTO (-1), 182 EMPTY_HOWTO (-1), 183 EMPTY_HOWTO (-1), 184 185 HOWTO (R_VAX_PLT32, /* type */ 186 0, /* rightshift */ 187 2, /* size (0 = byte, 1 = short, 2 = long) */ 188 32, /* bitsize */ 189 TRUE, /* pc_relative */ 190 0, /* bitpos */ 191 complain_overflow_bitfield, /* complain_on_overflow */ 192 bfd_elf_generic_reloc, /* special_function */ 193 "R_VAX_PLT32", /* name */ 194 FALSE, /* partial_inplace */ 195 0, /* src_mask */ 196 0xffffffff, /* dst_mask */ 197 TRUE), /* pcrel_offset */ 198 199 EMPTY_HOWTO (-1), 200 EMPTY_HOWTO (-1), 201 EMPTY_HOWTO (-1), 202 EMPTY_HOWTO (-1), 203 EMPTY_HOWTO (-1), 204 205 HOWTO (R_VAX_COPY, /* type */ 206 0, /* rightshift */ 207 0, /* size (0 = byte, 1 = short, 2 = long) */ 208 0, /* bitsize */ 209 FALSE, /* pc_relative */ 210 0, /* bitpos */ 211 complain_overflow_dont, /* complain_on_overflow */ 212 bfd_elf_generic_reloc, /* special_function */ 213 "R_VAX_COPY", /* name */ 214 FALSE, /* partial_inplace */ 215 0, /* src_mask */ 216 0xffffffff, /* dst_mask */ 217 FALSE), /* pcrel_offset */ 218 219 HOWTO (R_VAX_GLOB_DAT, /* type */ 220 0, /* rightshift */ 221 2, /* size (0 = byte, 1 = short, 2 = long) */ 222 32, /* bitsize */ 223 FALSE, /* pc_relative */ 224 0, /* bitpos */ 225 complain_overflow_dont, /* complain_on_overflow */ 226 bfd_elf_generic_reloc, /* special_function */ 227 "R_VAX_GLOB_DAT", /* name */ 228 FALSE, /* partial_inplace */ 229 0, /* src_mask */ 230 0xffffffff, /* dst_mask */ 231 FALSE), /* pcrel_offset */ 232 233 HOWTO (R_VAX_JMP_SLOT, /* type */ 234 0, /* rightshift */ 235 2, /* size (0 = byte, 1 = short, 2 = long) */ 236 32, /* bitsize */ 237 FALSE, /* pc_relative */ 238 0, /* bitpos */ 239 complain_overflow_dont, /* complain_on_overflow */ 240 bfd_elf_generic_reloc, /* special_function */ 241 "R_VAX_JMP_SLOT", /* name */ 242 FALSE, /* partial_inplace */ 243 0, /* src_mask */ 244 0xffffffff, /* dst_mask */ 245 FALSE), /* pcrel_offset */ 246 247 HOWTO (R_VAX_RELATIVE, /* type */ 248 0, /* rightshift */ 249 2, /* size (0 = byte, 1 = short, 2 = long) */ 250 32, /* bitsize */ 251 FALSE, /* pc_relative */ 252 0, /* bitpos */ 253 complain_overflow_dont, /* complain_on_overflow */ 254 bfd_elf_generic_reloc, /* special_function */ 255 "R_VAX_RELATIVE", /* name */ 256 FALSE, /* partial_inplace */ 257 0, /* src_mask */ 258 0xffffffff, /* dst_mask */ 259 FALSE), /* pcrel_offset */ 260 261 /* GNU extension to record C++ vtable hierarchy */ 262 HOWTO (R_VAX_GNU_VTINHERIT, /* type */ 263 0, /* rightshift */ 264 2, /* size (0 = byte, 1 = short, 2 = long) */ 265 0, /* bitsize */ 266 FALSE, /* pc_relative */ 267 0, /* bitpos */ 268 complain_overflow_dont, /* complain_on_overflow */ 269 NULL, /* special_function */ 270 "R_VAX_GNU_VTINHERIT", /* name */ 271 FALSE, /* partial_inplace */ 272 0, /* src_mask */ 273 0, /* dst_mask */ 274 FALSE), /* pcrel_offset */ 275 276 /* GNU extension to record C++ vtable member usage */ 277 HOWTO (R_VAX_GNU_VTENTRY, /* type */ 278 0, /* rightshift */ 279 2, /* size (0 = byte, 1 = short, 2 = long) */ 280 0, /* bitsize */ 281 FALSE, /* pc_relative */ 282 0, /* bitpos */ 283 complain_overflow_dont, /* complain_on_overflow */ 284 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 285 "R_VAX_GNU_VTENTRY", /* name */ 286 FALSE, /* partial_inplace */ 287 0, /* src_mask */ 288 0, /* dst_mask */ 289 FALSE), /* pcrel_offset */ 290}; 291 292static void 293rtype_to_howto (abfd, cache_ptr, dst) 294 bfd *abfd ATTRIBUTE_UNUSED; 295 arelent *cache_ptr; 296 Elf_Internal_Rela *dst; 297{ 298 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max); 299 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)]; 300} 301 302#define elf_info_to_howto rtype_to_howto 303 304static const struct 305{ 306 bfd_reloc_code_real_type bfd_val; 307 int elf_val; 308} reloc_map[] = { 309 { BFD_RELOC_NONE, R_VAX_NONE }, 310 { BFD_RELOC_32, R_VAX_32 }, 311 { BFD_RELOC_16, R_VAX_16 }, 312 { BFD_RELOC_8, R_VAX_8 }, 313 { BFD_RELOC_32_PCREL, R_VAX_PC32 }, 314 { BFD_RELOC_16_PCREL, R_VAX_PC16 }, 315 { BFD_RELOC_8_PCREL, R_VAX_PC8 }, 316 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 }, 317 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 }, 318 { BFD_RELOC_NONE, R_VAX_COPY }, 319 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT }, 320 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT }, 321 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE }, 322 { BFD_RELOC_CTOR, R_VAX_32 }, 323 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT }, 324 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY }, 325}; 326 327static reloc_howto_type * 328reloc_type_lookup (abfd, code) 329 bfd *abfd ATTRIBUTE_UNUSED; 330 bfd_reloc_code_real_type code; 331{ 332 unsigned int i; 333 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++) 334 { 335 if (reloc_map[i].bfd_val == code) 336 return &howto_table[reloc_map[i].elf_val]; 337 } 338 return 0; 339} 340 341#define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup 342#define ELF_ARCH bfd_arch_vax 343/* end code generated by elf.el */ 344 345/* Functions for the VAX ELF linker. */ 346 347/* The name of the dynamic interpreter. This is put in the .interp 348 section. */ 349 350#define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so" 351 352/* The size in bytes of an entry in the procedure linkage table. */ 353 354#define PLT_ENTRY_SIZE 12 355 356/* The first entry in a procedure linkage table looks like this. See 357 the SVR4 ABI VAX supplement to see how this works. */ 358 359static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] = 360{ 361 0xdd, 0xef, /* pushl l^ */ 362 0, 0, 0, 0, /* offset to .plt.got + 4 */ 363 0x17, 0xff, /* jmp @L^(pc) */ 364 0, 0, 0, 0, /* offset to .plt.got + 8 */ 365}; 366 367/* Subsequent entries in a procedure linkage table look like this. */ 368 369static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] = 370{ 371 0x40, 0x00, /* .word ^M<r6> */ 372 0x16, 0xef, /* jsb L^(pc) */ 373 0, 0, 0, 0, /* replaced with offset to start of .plt */ 374 0, 0, 0, 0, /* index into .rela.plt */ 375}; 376 377/* The VAX linker needs to keep track of the number of relocs that it 378 decides to copy in check_relocs for each symbol. This is so that it 379 can discard PC relative relocs if it doesn't need them when linking 380 with -Bsymbolic. We store the information in a field extending the 381 regular ELF linker hash table. */ 382 383/* This structure keeps track of the number of PC relative relocs we have 384 copied for a given symbol. */ 385 386struct elf_vax_pcrel_relocs_copied 387{ 388 /* Next section. */ 389 struct elf_vax_pcrel_relocs_copied *next; 390 /* A section in dynobj. */ 391 asection *section; 392 /* Number of relocs copied in this section. */ 393 bfd_size_type count; 394}; 395 396/* VAX ELF linker hash entry. */ 397 398struct elf_vax_link_hash_entry 399{ 400 struct elf_link_hash_entry root; 401 402 /* Number of PC relative relocs copied for this symbol. */ 403 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied; 404 405 bfd_vma got_addend; 406}; 407 408/* VAX ELF linker hash table. */ 409 410struct elf_vax_link_hash_table 411{ 412 struct elf_link_hash_table root; 413}; 414 415/* Declare this now that the above structures are defined. */ 416 417static bfd_boolean elf_vax_discard_copies 418 PARAMS ((struct elf_vax_link_hash_entry *, PTR)); 419 420/* Declare this now that the above structures are defined. */ 421 422static bfd_boolean elf_vax_instantiate_got_entries 423 PARAMS ((struct elf_link_hash_entry *, PTR)); 424 425/* Traverse an VAX ELF linker hash table. */ 426 427#define elf_vax_link_hash_traverse(table, func, info) \ 428 (elf_link_hash_traverse \ 429 (&(table)->root, \ 430 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ 431 (info))) 432 433/* Get the VAX ELF linker hash table from a link_info structure. */ 434 435#define elf_vax_hash_table(p) \ 436 ((struct elf_vax_link_hash_table *) (p)->hash) 437 438/* Create an entry in an VAX ELF linker hash table. */ 439 440static struct bfd_hash_entry * 441elf_vax_link_hash_newfunc (entry, table, string) 442 struct bfd_hash_entry *entry; 443 struct bfd_hash_table *table; 444 const char *string; 445{ 446 struct elf_vax_link_hash_entry *ret = 447 (struct elf_vax_link_hash_entry *) entry; 448 449 /* Allocate the structure if it has not already been allocated by a 450 subclass. */ 451 if (ret == (struct elf_vax_link_hash_entry *) NULL) 452 ret = ((struct elf_vax_link_hash_entry *) 453 bfd_hash_allocate (table, 454 sizeof (struct elf_vax_link_hash_entry))); 455 if (ret == (struct elf_vax_link_hash_entry *) NULL) 456 return (struct bfd_hash_entry *) ret; 457 458 /* Call the allocation method of the superclass. */ 459 ret = ((struct elf_vax_link_hash_entry *) 460 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, 461 table, string)); 462 if (ret != (struct elf_vax_link_hash_entry *) NULL) 463 { 464 ret->pcrel_relocs_copied = NULL; 465 } 466 467 return (struct bfd_hash_entry *) ret; 468} 469 470/* Create an VAX ELF linker hash table. */ 471 472static struct bfd_link_hash_table * 473elf_vax_link_hash_table_create (abfd) 474 bfd *abfd; 475{ 476 struct elf_vax_link_hash_table *ret; 477 bfd_size_type amt = sizeof (struct elf_vax_link_hash_table); 478 479 ret = (struct elf_vax_link_hash_table *) bfd_malloc (amt); 480 if (ret == (struct elf_vax_link_hash_table *) NULL) 481 return NULL; 482 483 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, 484 elf_vax_link_hash_newfunc)) 485 { 486 free (ret); 487 return NULL; 488 } 489 490 return &ret->root.root; 491} 492 493/* Keep vax-specific flags in the ELF header */ 494static bfd_boolean 495elf32_vax_set_private_flags (abfd, flags) 496 bfd *abfd; 497 flagword flags; 498{ 499 elf_elfheader (abfd)->e_flags = flags; 500 elf_flags_init (abfd) = TRUE; 501 return TRUE; 502} 503 504/* Merge backend specific data from an object file to the output 505 object file when linking. */ 506static bfd_boolean 507elf32_vax_merge_private_bfd_data (ibfd, obfd) 508 bfd *ibfd; 509 bfd *obfd; 510{ 511 flagword out_flags; 512 flagword in_flags; 513 514 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour 515 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 516 return TRUE; 517 518 in_flags = elf_elfheader (ibfd)->e_flags; 519 out_flags = elf_elfheader (obfd)->e_flags; 520 521 if (!elf_flags_init (obfd)) 522 { 523 elf_flags_init (obfd) = TRUE; 524 elf_elfheader (obfd)->e_flags = in_flags; 525 } 526 527 return TRUE; 528} 529 530/* Display the flags field */ 531static bfd_boolean 532elf32_vax_print_private_bfd_data (abfd, ptr) 533 bfd *abfd; 534 PTR ptr; 535{ 536 FILE *file = (FILE *) ptr; 537 538 BFD_ASSERT (abfd != NULL && ptr != NULL); 539 540 /* Print normal ELF private data. */ 541 _bfd_elf_print_private_bfd_data (abfd, ptr); 542 543 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */ 544 545 /* xgettext:c-format */ 546 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); 547 548 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC) 549 fprintf (file, _(" [nonpic]")); 550 551 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT) 552 fprintf (file, _(" [d-float]")); 553 554 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT) 555 fprintf (file, _(" [g-float]")); 556 557 fputc ('\n', file); 558 559 return TRUE; 560} 561/* Look through the relocs for a section during the first phase, and 562 allocate space in the global offset table or procedure linkage 563 table. */ 564 565static bfd_boolean 566elf_vax_check_relocs (abfd, info, sec, relocs) 567 bfd *abfd; 568 struct bfd_link_info *info; 569 asection *sec; 570 const Elf_Internal_Rela *relocs; 571{ 572 bfd *dynobj; 573 Elf_Internal_Shdr *symtab_hdr; 574 struct elf_link_hash_entry **sym_hashes; 575 const Elf_Internal_Rela *rel; 576 const Elf_Internal_Rela *rel_end; 577 asection *sgot; 578 asection *srelgot; 579 asection *sreloc; 580 581 if (info->relocatable) 582 return TRUE; 583 584 dynobj = elf_hash_table (info)->dynobj; 585 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 586 sym_hashes = elf_sym_hashes (abfd); 587 588 sgot = NULL; 589 srelgot = NULL; 590 sreloc = NULL; 591 592 rel_end = relocs + sec->reloc_count; 593 for (rel = relocs; rel < rel_end; rel++) 594 { 595 unsigned long r_symndx; 596 struct elf_link_hash_entry *h; 597 598 r_symndx = ELF32_R_SYM (rel->r_info); 599 600 if (r_symndx < symtab_hdr->sh_info) 601 h = NULL; 602 else 603 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 604 605 switch (ELF32_R_TYPE (rel->r_info)) 606 { 607 case R_VAX_GOT32: 608 if (h != NULL 609 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 610 break; 611 612 /* This symbol requires a global offset table entry. */ 613 614 if (dynobj == NULL) 615 { 616 /* Create the .got section. */ 617 elf_hash_table (info)->dynobj = dynobj = abfd; 618 if (!_bfd_elf_create_got_section (dynobj, info)) 619 return FALSE; 620 } 621 622 if (sgot == NULL) 623 { 624 sgot = bfd_get_section_by_name (dynobj, ".got"); 625 BFD_ASSERT (sgot != NULL); 626 } 627 628 if (srelgot == NULL 629 && (h != NULL || info->shared)) 630 { 631 srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); 632 if (srelgot == NULL) 633 { 634 srelgot = bfd_make_section (dynobj, ".rela.got"); 635 if (srelgot == NULL 636 || !bfd_set_section_flags (dynobj, srelgot, 637 (SEC_ALLOC 638 | SEC_LOAD 639 | SEC_HAS_CONTENTS 640 | SEC_IN_MEMORY 641 | SEC_LINKER_CREATED 642 | SEC_READONLY)) 643 || !bfd_set_section_alignment (dynobj, srelgot, 2)) 644 return FALSE; 645 } 646 } 647 648 if (h != NULL) 649 { 650 struct elf_vax_link_hash_entry *eh; 651 652 eh = (struct elf_vax_link_hash_entry *) h; 653 if (h->got.refcount == -1) 654 { 655 h->got.refcount = 1; 656 eh->got_addend = rel->r_addend; 657 } 658 else 659 { 660 h->got.refcount++; 661 if (eh->got_addend != (bfd_vma) rel->r_addend) 662 (*_bfd_error_handler) 663 (_("%s: warning: GOT addend of %ld to `%s' does not match previous GOT addend of %ld"), 664 bfd_get_filename (abfd), rel->r_addend, 665 h->root.root.string, 666 eh->got_addend); 667 668 } 669 } 670 break; 671 672 case R_VAX_PLT32: 673 /* This symbol requires a procedure linkage table entry. We 674 actually build the entry in adjust_dynamic_symbol, 675 because this might be a case of linking PIC code which is 676 never referenced by a dynamic object, in which case we 677 don't need to generate a procedure linkage table entry 678 after all. */ 679 680 /* If this is a local symbol, we resolve it directly without 681 creating a procedure linkage table entry. */ 682 if (h == NULL) 683 continue; 684 685 h->needs_plt = 1; 686 if (h->plt.refcount == -1) 687 h->plt.refcount = 1; 688 else 689 h->plt.refcount++; 690 break; 691 692 case R_VAX_PC8: 693 case R_VAX_PC16: 694 case R_VAX_PC32: 695 /* If we are creating a shared library and this is not a local 696 symbol, we need to copy the reloc into the shared library. 697 However when linking with -Bsymbolic and this is a global 698 symbol which is defined in an object we are including in the 699 link (i.e., DEF_REGULAR is set), then we can resolve the 700 reloc directly. At this point we have not seen all the input 701 files, so it is possible that DEF_REGULAR is not set now but 702 will be set later (it is never cleared). We account for that 703 possibility below by storing information in the 704 pcrel_relocs_copied field of the hash table entry. */ 705 if (!(info->shared 706 && (sec->flags & SEC_ALLOC) != 0 707 && h != NULL 708 && (!info->symbolic 709 || !h->def_regular))) 710 { 711 if (h != NULL) 712 { 713 /* Make sure a plt entry is created for this symbol if 714 it turns out to be a function defined by a dynamic 715 object. */ 716 if (h->plt.refcount == -1) 717 h->plt.refcount = 1; 718 else 719 h->plt.refcount++; 720 } 721 break; 722 } 723 /* Fall through. */ 724 case R_VAX_8: 725 case R_VAX_16: 726 case R_VAX_32: 727 if (h != NULL) 728 { 729 /* Make sure a plt entry is created for this symbol if it 730 turns out to be a function defined by a dynamic object. */ 731 if (h->plt.refcount == -1) 732 h->plt.refcount = 1; 733 else 734 h->plt.refcount++; 735 } 736 737 /* If we are creating a shared library, we need to copy the 738 reloc into the shared library. */ 739 if (info->shared 740 && (sec->flags & SEC_ALLOC) != 0) 741 { 742 /* When creating a shared object, we must copy these 743 reloc types into the output file. We create a reloc 744 section in dynobj and make room for this reloc. */ 745 if (sreloc == NULL) 746 { 747 const char *name; 748 749 name = (bfd_elf_string_from_elf_section 750 (abfd, 751 elf_elfheader (abfd)->e_shstrndx, 752 elf_section_data (sec)->rel_hdr.sh_name)); 753 if (name == NULL) 754 return FALSE; 755 756 BFD_ASSERT (strncmp (name, ".rela", 5) == 0 757 && strcmp (bfd_get_section_name (abfd, sec), 758 name + 5) == 0); 759 760 sreloc = bfd_get_section_by_name (dynobj, name); 761 if (sreloc == NULL) 762 { 763 sreloc = bfd_make_section (dynobj, name); 764 if (sreloc == NULL 765 || !bfd_set_section_flags (dynobj, sreloc, 766 (SEC_ALLOC 767 | SEC_LOAD 768 | SEC_HAS_CONTENTS 769 | SEC_IN_MEMORY 770 | SEC_LINKER_CREATED 771 | SEC_READONLY)) 772 || !bfd_set_section_alignment (dynobj, sreloc, 2)) 773 return FALSE; 774 } 775 if (sec->flags & SEC_READONLY) 776 info->flags |= DF_TEXTREL; 777 } 778 779 sreloc->size += sizeof (Elf32_External_Rela); 780 781 /* If we are linking with -Bsymbolic, we count the number of 782 PC relative relocations we have entered for this symbol, 783 so that we can discard them again if the symbol is later 784 defined by a regular object. Note that this function is 785 only called if we are using a vaxelf linker hash table, 786 which means that h is really a pointer to an 787 elf_vax_link_hash_entry. */ 788 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8 789 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16 790 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32) 791 && info->symbolic) 792 { 793 struct elf_vax_link_hash_entry *eh; 794 struct elf_vax_pcrel_relocs_copied *p; 795 796 eh = (struct elf_vax_link_hash_entry *) h; 797 798 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) 799 if (p->section == sreloc) 800 break; 801 802 if (p == NULL) 803 { 804 p = ((struct elf_vax_pcrel_relocs_copied *) 805 bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); 806 if (p == NULL) 807 return FALSE; 808 p->next = eh->pcrel_relocs_copied; 809 eh->pcrel_relocs_copied = p; 810 p->section = sreloc; 811 p->count = 0; 812 } 813 814 ++p->count; 815 } 816 } 817 818 break; 819 820 /* This relocation describes the C++ object vtable hierarchy. 821 Reconstruct it for later use during GC. */ 822 case R_VAX_GNU_VTINHERIT: 823 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 824 return FALSE; 825 break; 826 827 /* This relocation describes which C++ vtable entries are actually 828 used. Record for later use during GC. */ 829 case R_VAX_GNU_VTENTRY: 830 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 831 return FALSE; 832 break; 833 834 default: 835 break; 836 } 837 } 838 839 return TRUE; 840} 841 842/* Return the section that should be marked against GC for a given 843 relocation. */ 844 845static asection * 846elf_vax_gc_mark_hook (sec, info, rel, h, sym) 847 asection *sec; 848 struct bfd_link_info *info ATTRIBUTE_UNUSED; 849 Elf_Internal_Rela *rel; 850 struct elf_link_hash_entry *h; 851 Elf_Internal_Sym *sym; 852{ 853 if (h != NULL) 854 { 855 switch (ELF32_R_TYPE (rel->r_info)) 856 { 857 case R_VAX_GNU_VTINHERIT: 858 case R_VAX_GNU_VTENTRY: 859 break; 860 861 default: 862 switch (h->root.type) 863 { 864 default: 865 break; 866 867 case bfd_link_hash_defined: 868 case bfd_link_hash_defweak: 869 return h->root.u.def.section; 870 871 case bfd_link_hash_common: 872 return h->root.u.c.p->section; 873 } 874 } 875 } 876 else 877 return bfd_section_from_elf_index (sec->owner, sym->st_shndx); 878 879 return NULL; 880} 881 882/* Update the got entry reference counts for the section being removed. */ 883 884static bfd_boolean 885elf_vax_gc_sweep_hook (abfd, info, sec, relocs) 886 bfd *abfd; 887 struct bfd_link_info *info; 888 asection *sec; 889 const Elf_Internal_Rela *relocs; 890{ 891 Elf_Internal_Shdr *symtab_hdr; 892 struct elf_link_hash_entry **sym_hashes; 893 const Elf_Internal_Rela *rel, *relend; 894 bfd *dynobj; 895 896 dynobj = elf_hash_table (info)->dynobj; 897 if (dynobj == NULL) 898 return TRUE; 899 900 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 901 sym_hashes = elf_sym_hashes (abfd); 902 903 relend = relocs + sec->reloc_count; 904 for (rel = relocs; rel < relend; rel++) 905 { 906 unsigned long r_symndx; 907 struct elf_link_hash_entry *h; 908 909 switch (ELF32_R_TYPE (rel->r_info)) 910 { 911 case R_VAX_GOT32: 912 r_symndx = ELF32_R_SYM (rel->r_info); 913 if (r_symndx >= symtab_hdr->sh_info) 914 { 915 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 916 if (h->got.refcount > 0) 917 --h->got.refcount; 918 } 919 break; 920 921 case R_VAX_PLT32: 922 case R_VAX_PC8: 923 case R_VAX_PC16: 924 case R_VAX_PC32: 925 case R_VAX_8: 926 case R_VAX_16: 927 case R_VAX_32: 928 r_symndx = ELF32_R_SYM (rel->r_info); 929 if (r_symndx >= symtab_hdr->sh_info) 930 { 931 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 932 if (h->plt.refcount > 0) 933 --h->plt.refcount; 934 } 935 break; 936 937 default: 938 break; 939 } 940 } 941 942 return TRUE; 943} 944 945/* Adjust a symbol defined by a dynamic object and referenced by a 946 regular object. The current definition is in some section of the 947 dynamic object, but we're not including those sections. We have to 948 change the definition to something the rest of the link can 949 understand. */ 950 951static bfd_boolean 952elf_vax_adjust_dynamic_symbol (info, h) 953 struct bfd_link_info *info; 954 struct elf_link_hash_entry *h; 955{ 956 bfd *dynobj; 957 asection *s; 958 unsigned int power_of_two; 959 960 dynobj = elf_hash_table (info)->dynobj; 961 962 /* Make sure we know what is going on here. */ 963 BFD_ASSERT (dynobj != NULL 964 && (h->needs_plt 965 || h->u.weakdef != NULL 966 || (h->def_dynamic 967 && h->ref_regular 968 && !h->def_regular))); 969 970 /* If this is a function, put it in the procedure linkage table. We 971 will fill in the contents of the procedure linkage table later, 972 when we know the address of the .got section. */ 973 if (h->type == STT_FUNC 974 || h->needs_plt) 975 { 976 if (! info->shared 977 && !h->def_dynamic 978 && !h->ref_dynamic 979 /* We must always create the plt entry if it was referenced 980 by a PLTxxO relocation. In this case we already recorded 981 it as a dynamic symbol. */ 982 && h->dynindx == -1) 983 { 984 /* This case can occur if we saw a PLTxx reloc in an input 985 file, but the symbol was never referred to by a dynamic 986 object. In such a case, we don't actually need to build 987 a procedure linkage table, and we can just do a PCxx 988 reloc instead. */ 989 BFD_ASSERT (h->needs_plt); 990 h->plt.offset = (bfd_vma) -1; 991 return TRUE; 992 } 993 994 /* GC may have rendered this entry unused. */ 995 if (h->plt.refcount <= 0) 996 { 997 h->needs_plt = 0; 998 h->plt.offset = (bfd_vma) -1; 999 return TRUE; 1000 } 1001 1002 /* Make sure this symbol is output as a dynamic symbol. */ 1003 if (h->dynindx == -1) 1004 { 1005 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1006 return FALSE; 1007 } 1008 1009 s = bfd_get_section_by_name (dynobj, ".plt"); 1010 BFD_ASSERT (s != NULL); 1011 1012 /* If this is the first .plt entry, make room for the special 1013 first entry. */ 1014 if (s->size == 0) 1015 { 1016 s->size += PLT_ENTRY_SIZE; 1017 } 1018 1019 /* If this symbol is not defined in a regular file, and we are 1020 not generating a shared library, then set the symbol to this 1021 location in the .plt. This is required to make function 1022 pointers compare as equal between the normal executable and 1023 the shared library. */ 1024 if (!info->shared 1025 && !h->def_regular) 1026 { 1027 h->root.u.def.section = s; 1028 h->root.u.def.value = s->size; 1029 } 1030 1031 h->plt.offset = s->size; 1032 1033 /* Make room for this entry. */ 1034 s->size += PLT_ENTRY_SIZE; 1035 1036 /* We also need to make an entry in the .got.plt section, which 1037 will be placed in the .got section by the linker script. */ 1038 1039 s = bfd_get_section_by_name (dynobj, ".got.plt"); 1040 BFD_ASSERT (s != NULL); 1041 s->size += 4; 1042 1043 /* We also need to make an entry in the .rela.plt section. */ 1044 1045 s = bfd_get_section_by_name (dynobj, ".rela.plt"); 1046 BFD_ASSERT (s != NULL); 1047 s->size += sizeof (Elf32_External_Rela); 1048 1049 return TRUE; 1050 } 1051 1052 /* Reinitialize the plt offset now that it is not used as a reference 1053 count any more. */ 1054 h->plt.offset = (bfd_vma) -1; 1055 1056 /* If this is a weak symbol, and there is a real definition, the 1057 processor independent code will have arranged for us to see the 1058 real definition first, and we can just use the same value. */ 1059 if (h->u.weakdef != NULL) 1060 { 1061 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 1062 || h->u.weakdef->root.type == bfd_link_hash_defweak); 1063 h->root.u.def.section = h->u.weakdef->root.u.def.section; 1064 h->root.u.def.value = h->u.weakdef->root.u.def.value; 1065 return TRUE; 1066 } 1067 1068 /* This is a reference to a symbol defined by a dynamic object which 1069 is not a function. */ 1070 1071 /* If we are creating a shared library, we must presume that the 1072 only references to the symbol are via the global offset table. 1073 For such cases we need not do anything here; the relocations will 1074 be handled correctly by relocate_section. */ 1075 if (info->shared) 1076 return TRUE; 1077 1078 /* We must allocate the symbol in our .dynbss section, which will 1079 become part of the .bss section of the executable. There will be 1080 an entry for this symbol in the .dynsym section. The dynamic 1081 object will contain position independent code, so all references 1082 from the dynamic object to this symbol will go through the global 1083 offset table. The dynamic linker will use the .dynsym entry to 1084 determine the address it must put in the global offset table, so 1085 both the dynamic object and the regular object will refer to the 1086 same memory location for the variable. */ 1087 1088 s = bfd_get_section_by_name (dynobj, ".dynbss"); 1089 BFD_ASSERT (s != NULL); 1090 1091 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to 1092 copy the initial value out of the dynamic object and into the 1093 runtime process image. We need to remember the offset into the 1094 .rela.bss section we are going to use. */ 1095 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) 1096 { 1097 asection *srel; 1098 1099 srel = bfd_get_section_by_name (dynobj, ".rela.bss"); 1100 BFD_ASSERT (srel != NULL); 1101 srel->size += sizeof (Elf32_External_Rela); 1102 h->needs_copy = 1; 1103 } 1104 1105 /* We need to figure out the alignment required for this symbol. I 1106 have no idea how ELF linkers handle this. */ 1107 power_of_two = bfd_log2 (h->size); 1108 if (power_of_two > 3) 1109 power_of_two = 3; 1110 1111 /* Apply the required alignment. */ 1112 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); 1113 if (power_of_two > bfd_get_section_alignment (dynobj, s)) 1114 { 1115 if (!bfd_set_section_alignment (dynobj, s, power_of_two)) 1116 return FALSE; 1117 } 1118 1119 /* Define the symbol as being at this point in the section. */ 1120 h->root.u.def.section = s; 1121 h->root.u.def.value = s->size; 1122 1123 /* Increment the section size to make room for the symbol. */ 1124 s->size += h->size; 1125 1126 return TRUE; 1127} 1128 1129/* Set the sizes of the dynamic sections. */ 1130 1131static bfd_boolean 1132elf_vax_size_dynamic_sections (output_bfd, info) 1133 bfd *output_bfd; 1134 struct bfd_link_info *info; 1135{ 1136 bfd *dynobj; 1137 asection *s; 1138 bfd_boolean plt; 1139 bfd_boolean relocs; 1140 bfd_boolean reltext; 1141 1142 dynobj = elf_hash_table (info)->dynobj; 1143 BFD_ASSERT (dynobj != NULL); 1144 1145 if (elf_hash_table (info)->dynamic_sections_created) 1146 { 1147 /* Set the contents of the .interp section to the interpreter. */ 1148 if (info->executable) 1149 { 1150 s = bfd_get_section_by_name (dynobj, ".interp"); 1151 BFD_ASSERT (s != NULL); 1152 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 1153 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 1154 } 1155 } 1156 else 1157 { 1158 /* We may have created entries in the .rela.got and .got sections. 1159 However, if we are not creating the dynamic sections, we will 1160 not actually use these entries. Reset the size of .rela.got 1161 and .got, which will cause it to get stripped from the output 1162 file below. */ 1163 s = bfd_get_section_by_name (dynobj, ".rela.got"); 1164 if (s != NULL) 1165 s->size = 0; 1166 s = bfd_get_section_by_name (dynobj, ".got.plt"); 1167 if (s != NULL) 1168 s->size = 0; 1169 s = bfd_get_section_by_name (dynobj, ".got"); 1170 if (s != NULL) 1171 s->size = 0; 1172 } 1173 1174 /* If this is a -Bsymbolic shared link, then we need to discard all PC 1175 relative relocs against symbols defined in a regular object. We 1176 allocated space for them in the check_relocs routine, but we will not 1177 fill them in in the relocate_section routine. */ 1178 if (info->shared && info->symbolic) 1179 elf_vax_link_hash_traverse (elf_vax_hash_table (info), 1180 elf_vax_discard_copies, 1181 (PTR) NULL); 1182 1183 /* If this is a -Bsymbolic shared link or a static link, we need to 1184 discard all the got entries we've recorded. Otherwise, we need to 1185 instantiate (allocate space for them). */ 1186 elf_link_hash_traverse (elf_hash_table (info), 1187 elf_vax_instantiate_got_entries, 1188 (PTR) info); 1189 1190 /* The check_relocs and adjust_dynamic_symbol entry points have 1191 determined the sizes of the various dynamic sections. Allocate 1192 memory for them. */ 1193 plt = FALSE; 1194 relocs = FALSE; 1195 reltext = FALSE; 1196 for (s = dynobj->sections; s != NULL; s = s->next) 1197 { 1198 const char *name; 1199 bfd_boolean strip; 1200 1201 if ((s->flags & SEC_LINKER_CREATED) == 0) 1202 continue; 1203 1204 /* It's OK to base decisions on the section name, because none 1205 of the dynobj section names depend upon the input files. */ 1206 name = bfd_get_section_name (dynobj, s); 1207 1208 strip = FALSE; 1209 1210 if (strcmp (name, ".plt") == 0) 1211 { 1212 if (s->size == 0) 1213 { 1214 /* Strip this section if we don't need it; see the 1215 comment below. */ 1216 strip = TRUE; 1217 } 1218 else 1219 { 1220 /* Remember whether there is a PLT. */ 1221 plt = TRUE; 1222 } 1223 } 1224 else if (strncmp (name, ".rela", 5) == 0) 1225 { 1226 if (s->size == 0) 1227 { 1228 /* If we don't need this section, strip it from the 1229 output file. This is mostly to handle .rela.bss and 1230 .rela.plt. We must create both sections in 1231 create_dynamic_sections, because they must be created 1232 before the linker maps input sections to output 1233 sections. The linker does that before 1234 adjust_dynamic_symbol is called, and it is that 1235 function which decides whether anything needs to go 1236 into these sections. */ 1237 strip = TRUE; 1238 } 1239 else 1240 { 1241 asection *target; 1242 1243 /* Remember whether there are any reloc sections other 1244 than .rela.plt. */ 1245 if (strcmp (name, ".rela.plt") != 0) 1246 { 1247 const char *outname; 1248 1249 relocs = TRUE; 1250 1251 /* If this relocation section applies to a read only 1252 section, then we probably need a DT_TEXTREL 1253 entry. .rela.plt is actually associated with 1254 .got.plt, which is never readonly. */ 1255 outname = bfd_get_section_name (output_bfd, 1256 s->output_section); 1257 target = bfd_get_section_by_name (output_bfd, outname + 5); 1258 if (target != NULL 1259 && (target->flags & SEC_READONLY) != 0 1260 && (target->flags & SEC_ALLOC) != 0) 1261 reltext = TRUE; 1262 } 1263 1264 /* We use the reloc_count field as a counter if we need 1265 to copy relocs into the output file. */ 1266 s->reloc_count = 0; 1267 } 1268 } 1269 else if (strncmp (name, ".got", 4) != 0) 1270 { 1271 /* It's not one of our sections, so don't allocate space. */ 1272 continue; 1273 } 1274 1275 if (strip) 1276 { 1277 _bfd_strip_section_from_output (info, s); 1278 continue; 1279 } 1280 1281 /* Allocate memory for the section contents. */ 1282 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size); 1283 if (s->contents == NULL && s->size != 0) 1284 return FALSE; 1285 } 1286 1287 if (elf_hash_table (info)->dynamic_sections_created) 1288 { 1289 /* Add some entries to the .dynamic section. We fill in the 1290 values later, in elf_vax_finish_dynamic_sections, but we 1291 must add the entries now so that we get the correct size for 1292 the .dynamic section. The DT_DEBUG entry is filled in by the 1293 dynamic linker and used by the debugger. */ 1294#define add_dynamic_entry(TAG, VAL) \ 1295 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 1296 1297 if (!info->shared) 1298 { 1299 if (!add_dynamic_entry (DT_DEBUG, 0)) 1300 return FALSE; 1301 } 1302 1303 if (plt) 1304 { 1305 if (!add_dynamic_entry (DT_PLTGOT, 0) 1306 || !add_dynamic_entry (DT_PLTRELSZ, 0) 1307 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 1308 || !add_dynamic_entry (DT_JMPREL, 0)) 1309 return FALSE; 1310 } 1311 1312 if (relocs) 1313 { 1314 if (!add_dynamic_entry (DT_RELA, 0) 1315 || !add_dynamic_entry (DT_RELASZ, 0) 1316 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 1317 return FALSE; 1318 } 1319 1320 if (reltext || (info->flags & DF_TEXTREL) != 0) 1321 { 1322 if (!add_dynamic_entry (DT_TEXTREL, 0)) 1323 return FALSE; 1324 } 1325 } 1326#undef add_dynamic_entry 1327 1328 return TRUE; 1329} 1330 1331/* This function is called via elf_vax_link_hash_traverse if we are 1332 creating a shared object with -Bsymbolic. It discards the space 1333 allocated to copy PC relative relocs against symbols which are defined 1334 in regular objects. We allocated space for them in the check_relocs 1335 routine, but we won't fill them in in the relocate_section routine. */ 1336 1337static bfd_boolean 1338elf_vax_discard_copies (h, ignore) 1339 struct elf_vax_link_hash_entry *h; 1340 PTR ignore ATTRIBUTE_UNUSED; 1341{ 1342 struct elf_vax_pcrel_relocs_copied *s; 1343 1344 if (h->root.root.type == bfd_link_hash_warning) 1345 h = (struct elf_vax_link_hash_entry *) h->root.root.u.i.link; 1346 1347 /* We only discard relocs for symbols defined in a regular object. */ 1348 if (!h->root.def_regular) 1349 return TRUE; 1350 1351 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) 1352 s->section->size -= s->count * sizeof (Elf32_External_Rela); 1353 1354 return TRUE; 1355} 1356 1357/* This function is called via elf_link_hash_traverse. It looks for entries 1358 that have GOT or PLT (.GOT) references. If creating a static object or a 1359 shared object with -Bsymbolic, it resets the reference count back to 0 1360 and sets the offset to -1 so normal PC32 relocation will be done. If 1361 creating a shared object or executable, space in the .got and .rela.got 1362 will be reserved for the symbol. */ 1363 1364static bfd_boolean 1365elf_vax_instantiate_got_entries (h, infoptr) 1366 struct elf_link_hash_entry *h; 1367 PTR infoptr; 1368{ 1369 struct bfd_link_info *info = (struct bfd_link_info *) infoptr; 1370 bfd *dynobj; 1371 asection *sgot; 1372 asection *srelgot; 1373 1374 /* We don't care about non-GOT (and non-PLT) entries. */ 1375 if (h->got.refcount <= 0 && h->plt.refcount <= 0) 1376 return TRUE; 1377 1378 dynobj = elf_hash_table (info)->dynobj; 1379 if (dynobj == NULL) 1380 return TRUE; 1381 1382 sgot = bfd_get_section_by_name (dynobj, ".got"); 1383 srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); 1384 1385 if (!elf_hash_table (info)->dynamic_sections_created 1386 || (info->shared && info->symbolic)) 1387 { 1388 h->got.refcount = 0; 1389 h->got.offset = (bfd_vma) -1; 1390 h->plt.refcount = 0; 1391 h->plt.offset = (bfd_vma) -1; 1392 } 1393 else if (h->got.refcount > 0) 1394 { 1395 /* Make sure this symbol is output as a dynamic symbol. */ 1396 if (h->dynindx == -1) 1397 { 1398 if (!bfd_elf_link_record_dynamic_symbol (info, h)) 1399 return FALSE; 1400 } 1401 1402 /* Allocate space in the .got and .rela.got sections. */ 1403 sgot->size += 4; 1404 srelgot->size += sizeof (Elf32_External_Rela); 1405 } 1406 1407 return TRUE; 1408} 1409 1410/* Relocate an VAX ELF section. */ 1411 1412static bfd_boolean 1413elf_vax_relocate_section (output_bfd, info, input_bfd, input_section, 1414 contents, relocs, local_syms, local_sections) 1415 bfd *output_bfd; 1416 struct bfd_link_info *info; 1417 bfd *input_bfd; 1418 asection *input_section; 1419 bfd_byte *contents; 1420 Elf_Internal_Rela *relocs; 1421 Elf_Internal_Sym *local_syms; 1422 asection **local_sections; 1423{ 1424 bfd *dynobj; 1425 Elf_Internal_Shdr *symtab_hdr; 1426 struct elf_link_hash_entry **sym_hashes; 1427 bfd_vma *local_got_offsets; 1428 bfd_vma plt_index; 1429 bfd_vma got_offset; 1430 asection *sgot; 1431 asection *splt; 1432 asection *sgotplt; 1433 asection *sreloc; 1434 Elf_Internal_Rela *rel; 1435 Elf_Internal_Rela *relend; 1436 1437 if (info->relocatable) 1438 return TRUE; 1439 1440 dynobj = elf_hash_table (info)->dynobj; 1441 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 1442 sym_hashes = elf_sym_hashes (input_bfd); 1443 local_got_offsets = elf_local_got_offsets (input_bfd); 1444 1445 sgot = NULL; 1446 splt = NULL; 1447 sgotplt = NULL; 1448 sreloc = NULL; 1449 1450 rel = relocs; 1451 relend = relocs + input_section->reloc_count; 1452 for (; rel < relend; rel++) 1453 { 1454 int r_type; 1455 reloc_howto_type *howto; 1456 unsigned long r_symndx; 1457 struct elf_link_hash_entry *h; 1458 Elf_Internal_Sym *sym; 1459 asection *sec; 1460 bfd_vma relocation; 1461 bfd_reloc_status_type r; 1462 1463 r_type = ELF32_R_TYPE (rel->r_info); 1464 if (r_type < 0 || r_type >= (int) R_VAX_max) 1465 { 1466 bfd_set_error (bfd_error_bad_value); 1467 return FALSE; 1468 } 1469 howto = howto_table + r_type; 1470 1471 /* This is a final link. */ 1472 r_symndx = ELF32_R_SYM (rel->r_info); 1473 h = NULL; 1474 sym = NULL; 1475 sec = NULL; 1476 if (r_symndx < symtab_hdr->sh_info) 1477 { 1478 sym = local_syms + r_symndx; 1479 sec = local_sections[r_symndx]; 1480 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 1481 } 1482 else 1483 { 1484 bfd_boolean unresolved_reloc; 1485 bfd_boolean warned; 1486 1487 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 1488 r_symndx, symtab_hdr, sym_hashes, 1489 h, sec, relocation, 1490 unresolved_reloc, warned); 1491 1492 if ((h->root.type == bfd_link_hash_defined 1493 || h->root.type == bfd_link_hash_defweak) 1494 && ((r_type == R_VAX_PLT32 1495 && h->plt.offset != (bfd_vma) -1 1496 && elf_hash_table (info)->dynamic_sections_created) 1497 || (r_type == R_VAX_GOT32 1498 && strcmp (h->root.root.string, 1499 "_GLOBAL_OFFSET_TABLE_") != 0 1500 && elf_hash_table (info)->dynamic_sections_created 1501 && (! info->shared 1502 || (! info->symbolic && h->dynindx != -1) 1503 || !h->def_regular)) 1504 || (info->shared 1505 && ((! info->symbolic && h->dynindx != -1) 1506 || !h->def_regular) 1507 && ((input_section->flags & SEC_ALLOC) != 0 1508 /* DWARF will emit R_VAX_32 relocations in its 1509 sections against symbols defined externally 1510 in shared libraries. We can't do anything 1511 with them here. */ 1512 1513 || ((input_section->flags & SEC_DEBUGGING) != 0 1514 && h->def_dynamic)) 1515 && (r_type == R_VAX_8 1516 || r_type == R_VAX_16 1517 || r_type == R_VAX_32 1518 || r_type == R_VAX_PC8 1519 || r_type == R_VAX_PC16 1520 || r_type == R_VAX_PC32)))) 1521 /* In these cases, we don't need the relocation 1522 value. We check specially because in some 1523 obscure cases sec->output_section will be NULL. */ 1524 relocation = 0; 1525 } 1526 1527 switch (r_type) 1528 { 1529 case R_VAX_GOT32: 1530 /* Relocation is to the address of the entry for this symbol 1531 in the global offset table. */ 1532 if (h == NULL || h->got.offset == (bfd_vma) -1) 1533 break; 1534 1535 /* Relocation is the offset of the entry for this symbol in 1536 the global offset table. */ 1537 1538 { 1539 bfd_vma off; 1540 1541 if (sgot == NULL) 1542 { 1543 sgot = bfd_get_section_by_name (dynobj, ".got"); 1544 BFD_ASSERT (sgot != NULL); 1545 } 1546 1547 BFD_ASSERT (h != NULL); 1548 off = h->got.offset; 1549 BFD_ASSERT (off != (bfd_vma) -1); 1550 BFD_ASSERT (off < sgot->size); 1551 1552 if (info->shared 1553 && h->dynindx == -1 1554 && h->def_regular) 1555 { 1556 /* The symbol was forced to be local 1557 because of a version file.. We must initialize 1558 this entry in the global offset table. Since 1559 the offset must always be a multiple of 4, we 1560 use the least significant bit to record whether 1561 we have initialized it already. 1562 1563 When doing a dynamic link, we create a .rela.got 1564 relocation entry to initialize the value. This 1565 is done in the finish_dynamic_symbol routine. */ 1566 if ((off & 1) != 0) 1567 off &= ~1; 1568 else 1569 { 1570 bfd_put_32 (output_bfd, relocation + rel->r_addend, 1571 sgot->contents + off); 1572 h->got.offset |= 1; 1573 } 1574 } else { 1575 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off); 1576 } 1577 1578 relocation = sgot->output_offset + off; 1579 /* The GOT relocation uses the addend. */ 1580 rel->r_addend = 0; 1581 1582 /* Change the reference to be indirect. */ 1583 contents[rel->r_offset - 1] |= 0x10; 1584 relocation += sgot->output_section->vma; 1585 } 1586 break; 1587 1588 case R_VAX_PLT32: 1589 /* Relocation is to the entry for this symbol in the 1590 procedure linkage table. */ 1591 1592 /* Resolve a PLTxx reloc against a local symbol directly, 1593 without using the procedure linkage table. */ 1594 if (h == NULL) 1595 break; 1596 1597 if (h->plt.offset == (bfd_vma) -1 1598 || !elf_hash_table (info)->dynamic_sections_created) 1599 { 1600 /* We didn't make a PLT entry for this symbol. This 1601 happens when statically linking PIC code, or when 1602 using -Bsymbolic. */ 1603 break; 1604 } 1605 1606 if (splt == NULL) 1607 { 1608 splt = bfd_get_section_by_name (dynobj, ".plt"); 1609 BFD_ASSERT (splt != NULL); 1610 } 1611 1612 if (sgotplt == NULL) 1613 { 1614 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); 1615 BFD_ASSERT (splt != NULL); 1616 } 1617 1618 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; 1619 1620 /* Get the offset into the .got table of the entry that 1621 corresponds to this function. Each .got entry is 4 bytes. 1622 The first two are reserved. */ 1623 got_offset = (plt_index + 3) * 4; 1624 1625 /* We want the relocate to point into the .got.plt instead 1626 of the plt itself. */ 1627 relocation = (sgotplt->output_section->vma 1628 + sgotplt->output_offset 1629 + got_offset); 1630 contents[rel->r_offset-1] |= 0x10; /* make indirect */ 1631 if (rel->r_addend == 2) 1632 { 1633 h->plt.offset |= 1; 1634 } 1635 else if (rel->r_addend != 0) 1636 (*_bfd_error_handler) 1637 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"), 1638 bfd_get_filename (input_bfd), rel->r_addend, 1639 h->root.root.string, 1640 bfd_get_section_name (input_bfd, input_section)); 1641 rel->r_addend = 0; 1642 1643 break; 1644 1645 case R_VAX_PC8: 1646 case R_VAX_PC16: 1647 case R_VAX_PC32: 1648 if (h == NULL) 1649 break; 1650 /* Fall through. */ 1651 case R_VAX_8: 1652 case R_VAX_16: 1653 case R_VAX_32: 1654 if (info->shared 1655 && r_symndx != 0 1656 && (input_section->flags & SEC_ALLOC) != 0 1657 && ((r_type != R_VAX_PC8 1658 && r_type != R_VAX_PC16 1659 && r_type != R_VAX_PC32) 1660 || (!info->symbolic 1661 || !h->def_regular))) 1662 { 1663 Elf_Internal_Rela outrel; 1664 bfd_byte *loc; 1665 bfd_boolean skip, relocate; 1666 1667 /* When generating a shared object, these relocations 1668 are copied into the output file to be resolved at run 1669 time. */ 1670 if (sreloc == NULL) 1671 { 1672 const char *name; 1673 1674 name = (bfd_elf_string_from_elf_section 1675 (input_bfd, 1676 elf_elfheader (input_bfd)->e_shstrndx, 1677 elf_section_data (input_section)->rel_hdr.sh_name)); 1678 if (name == NULL) 1679 return FALSE; 1680 1681 BFD_ASSERT (strncmp (name, ".rela", 5) == 0 1682 && strcmp (bfd_get_section_name (input_bfd, 1683 input_section), 1684 name + 5) == 0); 1685 1686 sreloc = bfd_get_section_by_name (dynobj, name); 1687 BFD_ASSERT (sreloc != NULL); 1688 } 1689 1690 skip = FALSE; 1691 relocate = FALSE; 1692 1693 outrel.r_offset = 1694 _bfd_elf_section_offset (output_bfd, info, input_section, 1695 rel->r_offset); 1696 if (outrel.r_offset == (bfd_vma) -1) 1697 skip = TRUE; 1698 if (outrel.r_offset == (bfd_vma) -2) 1699 skip = TRUE, relocate = TRUE; 1700 outrel.r_offset += (input_section->output_section->vma 1701 + input_section->output_offset); 1702 1703 if (skip) 1704 memset (&outrel, 0, sizeof outrel); 1705 /* h->dynindx may be -1 if the symbol was marked to 1706 become local. */ 1707 else if (h != NULL 1708 && ((! info->symbolic && h->dynindx != -1) 1709 || !h->def_regular)) 1710 { 1711 BFD_ASSERT (h->dynindx != -1); 1712 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 1713 outrel.r_addend = relocation + rel->r_addend; 1714 } 1715 else 1716 { 1717 if (r_type == R_VAX_32) 1718 { 1719 relocate = TRUE; 1720 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE); 1721 BFD_ASSERT (bfd_get_signed_32 (input_bfd, 1722 &contents[rel->r_offset]) == 0); 1723 outrel.r_addend = relocation + rel->r_addend; 1724 } 1725 else 1726 { 1727 long indx; 1728 1729 if (bfd_is_abs_section (sec)) 1730 indx = 0; 1731 else if (sec == NULL || sec->owner == NULL) 1732 { 1733 bfd_set_error (bfd_error_bad_value); 1734 return FALSE; 1735 } 1736 else 1737 { 1738 asection *osec; 1739 1740 osec = sec->output_section; 1741 indx = elf_section_data (osec)->dynindx; 1742 BFD_ASSERT (indx > 0); 1743 } 1744 1745 outrel.r_info = ELF32_R_INFO (indx, r_type); 1746 outrel.r_addend = relocation + rel->r_addend; 1747 } 1748 } 1749 1750 if (!strcmp (bfd_get_section_name (input_bfd, input_section), 1751 ".text") != 0 || 1752 (info->shared 1753 && ELF32_R_TYPE(outrel.r_info) != R_VAX_32 1754 && ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE 1755 && ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY 1756 && ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT 1757 && ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT)) 1758 { 1759 if (h != NULL) 1760 (*_bfd_error_handler) 1761 (_("%s: warning: %s relocation against symbol `%s' from %s section"), 1762 bfd_get_filename (input_bfd), howto->name, 1763 h->root.root.string, 1764 bfd_get_section_name (input_bfd, input_section)); 1765 else 1766 (*_bfd_error_handler) 1767 (_("%s: warning: %s relocation to 0x%x from %s section"), 1768 bfd_get_filename (input_bfd), howto->name, 1769 outrel.r_addend, 1770 bfd_get_section_name (input_bfd, input_section)); 1771 } 1772 loc = sreloc->contents; 1773 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 1774 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1775 1776 /* This reloc will be computed at runtime, so there's no 1777 need to do anything now, except for R_VAX_32 1778 relocations that have been turned into 1779 R_VAX_RELATIVE. */ 1780 if (!relocate) 1781 continue; 1782 } 1783 1784 break; 1785 1786 case R_VAX_GNU_VTINHERIT: 1787 case R_VAX_GNU_VTENTRY: 1788 /* These are no-ops in the end. */ 1789 continue; 1790 1791 default: 1792 break; 1793 } 1794 1795 /* VAX PCREL relocations are from the end of relocation, not the start. 1796 So subtract the difference from the relocation amount since we can't 1797 add it to the offset. */ 1798 if (howto->pc_relative && howto->pcrel_offset) 1799 relocation -= bfd_get_reloc_size(howto); 1800 1801 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 1802 contents, rel->r_offset, 1803 relocation, rel->r_addend); 1804 1805 if (r != bfd_reloc_ok) 1806 { 1807 switch (r) 1808 { 1809 default: 1810 case bfd_reloc_outofrange: 1811 abort (); 1812 case bfd_reloc_overflow: 1813 { 1814 const char *name; 1815 1816 if (h != NULL) 1817 name = h->root.root.string; 1818 else 1819 { 1820 name = bfd_elf_string_from_elf_section (input_bfd, 1821 symtab_hdr->sh_link, 1822 sym->st_name); 1823 if (name == NULL) 1824 return FALSE; 1825 if (*name == '\0') 1826 name = bfd_section_name (input_bfd, sec); 1827 } 1828 if (!(info->callbacks->reloc_overflow 1829 (info, name, howto->name, (bfd_vma) 0, 1830 input_bfd, input_section, rel->r_offset))) 1831 return FALSE; 1832 } 1833 break; 1834 } 1835 } 1836 } 1837 1838 return TRUE; 1839} 1840 1841/* Finish up dynamic symbol handling. We set the contents of various 1842 dynamic sections here. */ 1843 1844static bfd_boolean 1845elf_vax_finish_dynamic_symbol (output_bfd, info, h, sym) 1846 bfd *output_bfd; 1847 struct bfd_link_info *info; 1848 struct elf_link_hash_entry *h; 1849 Elf_Internal_Sym *sym; 1850{ 1851 bfd *dynobj; 1852 1853 dynobj = elf_hash_table (info)->dynobj; 1854 1855 if (h->plt.offset != (bfd_vma) -1) 1856 { 1857 asection *splt; 1858 asection *sgot; 1859 asection *srela; 1860 bfd_vma plt_index; 1861 bfd_vma got_offset; 1862 bfd_vma addend; 1863 Elf_Internal_Rela rela; 1864 bfd_byte *loc; 1865 1866 /* This symbol has an entry in the procedure linkage table. Set 1867 it up. */ 1868 BFD_ASSERT (h->dynindx != -1); 1869 1870 splt = bfd_get_section_by_name (dynobj, ".plt"); 1871 sgot = bfd_get_section_by_name (dynobj, ".got.plt"); 1872 srela = bfd_get_section_by_name (dynobj, ".rela.plt"); 1873 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); 1874 1875 addend = 2 * (h->plt.offset & 1); 1876 h->plt.offset &= ~1; 1877 1878 /* Get the index in the procedure linkage table which 1879 corresponds to this symbol. This is the index of this symbol 1880 in all the symbols for which we are making plt entries. The 1881 first entry in the procedure linkage table is reserved. */ 1882 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; 1883 1884 /* Get the offset into the .got table of the entry that 1885 corresponds to this function. Each .got entry is 4 bytes. 1886 The first two are reserved. */ 1887 got_offset = (plt_index + 3) * 4; 1888 1889 /* Fill in the entry in the procedure linkage table. */ 1890 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry, 1891 PLT_ENTRY_SIZE); 1892 1893 /* The offset is relative to the first extension word. */ 1894 bfd_put_32 (output_bfd, 1895 -(h->plt.offset + 8), 1896 splt->contents + h->plt.offset + 4); 1897 1898 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), 1899 splt->contents + h->plt.offset + 8); 1900 1901 /* Fill in the entry in the global offset table. */ 1902 bfd_put_32 (output_bfd, 1903 (splt->output_section->vma 1904 + splt->output_offset 1905 + h->plt.offset) + addend, 1906 sgot->contents + got_offset); 1907 1908 /* Fill in the entry in the .rela.plt section. */ 1909 rela.r_offset = (sgot->output_section->vma 1910 + sgot->output_offset 1911 + got_offset); 1912 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT); 1913 rela.r_addend = addend; 1914 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela); 1915 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1916 1917 if (!h->def_regular) 1918 { 1919 /* Mark the symbol as undefined, rather than as defined in 1920 the .plt section. Leave the value alone. */ 1921 sym->st_shndx = SHN_UNDEF; 1922 } 1923 } 1924 1925 if (h->got.offset != (bfd_vma) -1) 1926 { 1927 asection *sgot; 1928 asection *srela; 1929 Elf_Internal_Rela rela; 1930 bfd_byte *loc; 1931 1932 /* This symbol has an entry in the global offset table. Set it 1933 up. */ 1934 sgot = bfd_get_section_by_name (dynobj, ".got"); 1935 srela = bfd_get_section_by_name (dynobj, ".rela.got"); 1936 BFD_ASSERT (sgot != NULL && srela != NULL); 1937 1938 rela.r_offset = (sgot->output_section->vma 1939 + sgot->output_offset 1940 + (h->got.offset &~ 1)); 1941 1942 /* If the symbol was forced to be local because of a version file 1943 locally we just want to emit a RELATIVE reloc. The entry in 1944 the global offset table will already have been initialized in 1945 the relocate_section function. */ 1946 if (info->shared 1947 && h->dynindx == -1 1948 && h->def_regular) 1949 { 1950 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE); 1951 } 1952 else 1953 { 1954 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT); 1955 } 1956 rela.r_addend = bfd_get_signed_32 (output_bfd, 1957 (sgot->contents 1958 + (h->got.offset & ~1))); 1959 1960 loc = srela->contents; 1961 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); 1962 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1963 } 1964 1965 if (h->needs_copy) 1966 { 1967 asection *s; 1968 Elf_Internal_Rela rela; 1969 bfd_byte *loc; 1970 1971 /* This symbol needs a copy reloc. Set it up. */ 1972 BFD_ASSERT (h->dynindx != -1 1973 && (h->root.type == bfd_link_hash_defined 1974 || h->root.type == bfd_link_hash_defweak)); 1975 1976 s = bfd_get_section_by_name (h->root.u.def.section->owner, 1977 ".rela.bss"); 1978 BFD_ASSERT (s != NULL); 1979 1980 rela.r_offset = (h->root.u.def.value 1981 + h->root.u.def.section->output_section->vma 1982 + h->root.u.def.section->output_offset); 1983 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY); 1984 rela.r_addend = 0; 1985 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); 1986 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1987 } 1988 1989 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ 1990 if (strcmp (h->root.root.string, "_DYNAMIC") == 0 1991 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 1992 sym->st_shndx = SHN_ABS; 1993 1994 return TRUE; 1995} 1996 1997/* Finish up the dynamic sections. */ 1998 1999static bfd_boolean 2000elf_vax_finish_dynamic_sections (output_bfd, info) 2001 bfd *output_bfd; 2002 struct bfd_link_info *info; 2003{ 2004 bfd *dynobj; 2005 asection *sgot; 2006 asection *sdyn; 2007 2008 dynobj = elf_hash_table (info)->dynobj; 2009 2010 sgot = bfd_get_section_by_name (dynobj, ".got.plt"); 2011 BFD_ASSERT (sgot != NULL); 2012 sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); 2013 2014 if (elf_hash_table (info)->dynamic_sections_created) 2015 { 2016 asection *splt; 2017 Elf32_External_Dyn *dyncon, *dynconend; 2018 2019 splt = bfd_get_section_by_name (dynobj, ".plt"); 2020 BFD_ASSERT (splt != NULL && sdyn != NULL); 2021 2022 dyncon = (Elf32_External_Dyn *) sdyn->contents; 2023 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 2024 for (; dyncon < dynconend; dyncon++) 2025 { 2026 Elf_Internal_Dyn dyn; 2027 const char *name; 2028 asection *s; 2029 2030 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 2031 2032 switch (dyn.d_tag) 2033 { 2034 default: 2035 break; 2036 2037 case DT_PLTGOT: 2038 name = ".got"; 2039 goto get_vma; 2040 case DT_JMPREL: 2041 name = ".rela.plt"; 2042 get_vma: 2043 s = bfd_get_section_by_name (output_bfd, name); 2044 BFD_ASSERT (s != NULL); 2045 dyn.d_un.d_ptr = s->vma; 2046 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 2047 break; 2048 2049 case DT_PLTRELSZ: 2050 s = bfd_get_section_by_name (output_bfd, ".rela.plt"); 2051 BFD_ASSERT (s != NULL); 2052 dyn.d_un.d_val = s->size; 2053 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 2054 break; 2055 2056 case DT_RELASZ: 2057 /* The procedure linkage table relocs (DT_JMPREL) should 2058 not be included in the overall relocs (DT_RELA). 2059 Therefore, we override the DT_RELASZ entry here to 2060 make it not include the JMPREL relocs. Since the 2061 linker script arranges for .rela.plt to follow all 2062 other relocation sections, we don't have to worry 2063 about changing the DT_RELA entry. */ 2064 s = bfd_get_section_by_name (output_bfd, ".rela.plt"); 2065 if (s != NULL) 2066 dyn.d_un.d_val -= s->size; 2067 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 2068 break; 2069 } 2070 } 2071 2072 /* Fill in the first entry in the procedure linkage table. */ 2073 if (splt->size > 0) 2074 { 2075 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE); 2076 bfd_put_32 (output_bfd, 2077 (sgot->output_section->vma 2078 + sgot->output_offset + 4 2079 - (splt->output_section->vma + 6)), 2080 splt->contents + 2); 2081 bfd_put_32 (output_bfd, 2082 (sgot->output_section->vma 2083 + sgot->output_offset + 8 2084 - (splt->output_section->vma + 12)), 2085 splt->contents + 8); 2086 elf_section_data (splt->output_section)->this_hdr.sh_entsize 2087 = PLT_ENTRY_SIZE; 2088 } 2089 } 2090 2091 /* Fill in the first three entries in the global offset table. */ 2092 if (sgot->size > 0) 2093 { 2094 if (sdyn == NULL) 2095 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 2096 else 2097 bfd_put_32 (output_bfd, 2098 sdyn->output_section->vma + sdyn->output_offset, 2099 sgot->contents); 2100 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); 2101 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); 2102 } 2103 2104 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 2105 2106 return TRUE; 2107} 2108 2109#define TARGET_LITTLE_SYM bfd_elf32_vax_vec 2110#define TARGET_LITTLE_NAME "elf32-vax" 2111#define ELF_MACHINE_CODE EM_VAX 2112#define ELF_MAXPAGESIZE 0x1000 2113 2114#define elf_backend_create_dynamic_sections \ 2115 _bfd_elf_create_dynamic_sections 2116#define bfd_elf32_bfd_link_hash_table_create \ 2117 elf_vax_link_hash_table_create 2118#define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link 2119 2120#define elf_backend_check_relocs elf_vax_check_relocs 2121#define elf_backend_adjust_dynamic_symbol \ 2122 elf_vax_adjust_dynamic_symbol 2123#define elf_backend_size_dynamic_sections \ 2124 elf_vax_size_dynamic_sections 2125#define elf_backend_relocate_section elf_vax_relocate_section 2126#define elf_backend_finish_dynamic_symbol \ 2127 elf_vax_finish_dynamic_symbol 2128#define elf_backend_finish_dynamic_sections \ 2129 elf_vax_finish_dynamic_sections 2130#define elf_backend_gc_mark_hook elf_vax_gc_mark_hook 2131#define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook 2132#define bfd_elf32_bfd_merge_private_bfd_data \ 2133 elf32_vax_merge_private_bfd_data 2134#define bfd_elf32_bfd_set_private_flags \ 2135 elf32_vax_set_private_flags 2136#define bfd_elf32_bfd_print_private_bfd_data \ 2137 elf32_vax_print_private_bfd_data 2138 2139#define elf_backend_can_gc_sections 1 2140#define elf_backend_want_got_plt 1 2141#define elf_backend_plt_readonly 1 2142#define elf_backend_want_plt_sym 0 2143#define elf_backend_got_header_size 16 2144#define elf_backend_rela_normal 1 2145 2146#include "elf32-target.h" 2147