1 /* VAX series support for 32-bit ELF 2 Copyright (C) 1993-2014 Free Software Foundation, Inc. 3 Contributed by Matt Thomas <matt (at) 3am-software.com>. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 20 MA 02110-1301, USA. */ 21 22 #include "sysdep.h" 23 #include "bfd.h" 24 #include "bfdlink.h" 25 #include "libbfd.h" 26 #include "elf-bfd.h" 27 #include "elf/vax.h" 28 29 static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type); 30 static void rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *); 31 static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *, 32 struct bfd_hash_table *, 33 const char *); 34 static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *); 35 static bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *, 36 asection *, const Elf_Internal_Rela *); 37 static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *, 38 struct elf_link_hash_entry *); 39 static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *); 40 static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *, 41 bfd *, asection *, bfd_byte *, 42 Elf_Internal_Rela *, 43 Elf_Internal_Sym *, asection **); 44 static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *, 45 struct elf_link_hash_entry *, 46 Elf_Internal_Sym *); 47 static bfd_boolean elf_vax_finish_dynamic_sections (bfd *, 48 struct bfd_link_info *); 49 static bfd_vma elf_vax_plt_sym_val (bfd_vma, const asection *, 50 const arelent *); 51 52 static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword); 53 static bfd_boolean elf32_vax_merge_private_bfd_data (bfd *, bfd *); 54 static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, void *); 55 56 static reloc_howto_type howto_table[] = { 57 HOWTO (R_VAX_NONE, /* type */ 58 0, /* rightshift */ 59 0, /* size (0 = byte, 1 = short, 2 = long) */ 60 0, /* bitsize */ 61 FALSE, /* pc_relative */ 62 0, /* bitpos */ 63 complain_overflow_dont, /* complain_on_overflow */ 64 bfd_elf_generic_reloc, /* special_function */ 65 "R_VAX_NONE", /* name */ 66 FALSE, /* partial_inplace */ 67 0, /* src_mask */ 68 0x00000000, /* dst_mask */ 69 FALSE), /* pcrel_offset */ 70 71 HOWTO (R_VAX_32, /* type */ 72 0, /* rightshift */ 73 2, /* size (0 = byte, 1 = short, 2 = long) */ 74 32, /* bitsize */ 75 FALSE, /* pc_relative */ 76 0, /* bitpos */ 77 complain_overflow_bitfield, /* complain_on_overflow */ 78 bfd_elf_generic_reloc, /* special_function */ 79 "R_VAX_32", /* name */ 80 FALSE, /* partial_inplace */ 81 0, /* src_mask */ 82 0xffffffff, /* dst_mask */ 83 FALSE), /* pcrel_offset */ 84 85 HOWTO (R_VAX_16, /* type */ 86 0, /* rightshift */ 87 1, /* size (0 = byte, 1 = short, 2 = long) */ 88 16, /* bitsize */ 89 FALSE, /* pc_relative */ 90 0, /* bitpos */ 91 complain_overflow_bitfield, /* complain_on_overflow */ 92 bfd_elf_generic_reloc, /* special_function */ 93 "R_VAX_16", /* name */ 94 FALSE, /* partial_inplace */ 95 0, /* src_mask */ 96 0x0000ffff, /* dst_mask */ 97 FALSE), /* pcrel_offset */ 98 99 HOWTO (R_VAX_8, /* type */ 100 0, /* rightshift */ 101 0, /* size (0 = byte, 1 = short, 2 = long) */ 102 8, /* bitsize */ 103 FALSE, /* pc_relative */ 104 0, /* bitpos */ 105 complain_overflow_bitfield, /* complain_on_overflow */ 106 bfd_elf_generic_reloc, /* special_function */ 107 "R_VAX_8", /* name */ 108 FALSE, /* partial_inplace */ 109 0, /* src_mask */ 110 0x000000ff, /* dst_mask */ 111 FALSE), /* pcrel_offset */ 112 113 HOWTO (R_VAX_PC32, /* type */ 114 0, /* rightshift */ 115 2, /* size (0 = byte, 1 = short, 2 = long) */ 116 32, /* bitsize */ 117 TRUE, /* pc_relative */ 118 0, /* bitpos */ 119 complain_overflow_bitfield, /* complain_on_overflow */ 120 bfd_elf_generic_reloc, /* special_function */ 121 "R_VAX_PC32", /* name */ 122 FALSE, /* partial_inplace */ 123 0, /* src_mask */ 124 0xffffffff, /* dst_mask */ 125 TRUE), /* pcrel_offset */ 126 127 HOWTO (R_VAX_PC16, /* type */ 128 0, /* rightshift */ 129 1, /* size (0 = byte, 1 = short, 2 = long) */ 130 16, /* bitsize */ 131 TRUE, /* pc_relative */ 132 0, /* bitpos */ 133 complain_overflow_signed, /* complain_on_overflow */ 134 bfd_elf_generic_reloc, /* special_function */ 135 "R_VAX_PC16", /* name */ 136 FALSE, /* partial_inplace */ 137 0, /* src_mask */ 138 0x0000ffff, /* dst_mask */ 139 TRUE), /* pcrel_offset */ 140 141 HOWTO (R_VAX_PC8, /* type */ 142 0, /* rightshift */ 143 0, /* size (0 = byte, 1 = short, 2 = long) */ 144 8, /* bitsize */ 145 TRUE, /* pc_relative */ 146 0, /* bitpos */ 147 complain_overflow_signed, /* complain_on_overflow */ 148 bfd_elf_generic_reloc, /* special_function */ 149 "R_VAX_PC8", /* name */ 150 FALSE, /* partial_inplace */ 151 0, /* src_mask */ 152 0x000000ff, /* dst_mask */ 153 TRUE), /* pcrel_offset */ 154 155 HOWTO (R_VAX_GOT32, /* type */ 156 0, /* rightshift */ 157 2, /* size (0 = byte, 1 = short, 2 = long) */ 158 32, /* bitsize */ 159 TRUE, /* pc_relative */ 160 0, /* bitpos */ 161 complain_overflow_bitfield, /* complain_on_overflow */ 162 bfd_elf_generic_reloc, /* special_function */ 163 "R_VAX_GOT32", /* name */ 164 FALSE, /* partial_inplace */ 165 0, /* src_mask */ 166 0xffffffff, /* dst_mask */ 167 TRUE), /* pcrel_offset */ 168 169 EMPTY_HOWTO (-1), 170 EMPTY_HOWTO (-1), 171 EMPTY_HOWTO (-1), 172 EMPTY_HOWTO (-1), 173 EMPTY_HOWTO (-1), 174 175 HOWTO (R_VAX_PLT32, /* type */ 176 0, /* rightshift */ 177 2, /* size (0 = byte, 1 = short, 2 = long) */ 178 32, /* bitsize */ 179 TRUE, /* pc_relative */ 180 0, /* bitpos */ 181 complain_overflow_bitfield, /* complain_on_overflow */ 182 bfd_elf_generic_reloc, /* special_function */ 183 "R_VAX_PLT32", /* name */ 184 FALSE, /* partial_inplace */ 185 0, /* src_mask */ 186 0xffffffff, /* dst_mask */ 187 TRUE), /* pcrel_offset */ 188 189 EMPTY_HOWTO (-1), 190 EMPTY_HOWTO (-1), 191 EMPTY_HOWTO (-1), 192 EMPTY_HOWTO (-1), 193 EMPTY_HOWTO (-1), 194 195 HOWTO (R_VAX_COPY, /* type */ 196 0, /* rightshift */ 197 0, /* size (0 = byte, 1 = short, 2 = long) */ 198 0, /* bitsize */ 199 FALSE, /* pc_relative */ 200 0, /* bitpos */ 201 complain_overflow_dont, /* complain_on_overflow */ 202 bfd_elf_generic_reloc, /* special_function */ 203 "R_VAX_COPY", /* name */ 204 FALSE, /* partial_inplace */ 205 0, /* src_mask */ 206 0xffffffff, /* dst_mask */ 207 FALSE), /* pcrel_offset */ 208 209 HOWTO (R_VAX_GLOB_DAT, /* type */ 210 0, /* rightshift */ 211 2, /* size (0 = byte, 1 = short, 2 = long) */ 212 32, /* bitsize */ 213 FALSE, /* pc_relative */ 214 0, /* bitpos */ 215 complain_overflow_dont, /* complain_on_overflow */ 216 bfd_elf_generic_reloc, /* special_function */ 217 "R_VAX_GLOB_DAT", /* name */ 218 FALSE, /* partial_inplace */ 219 0, /* src_mask */ 220 0xffffffff, /* dst_mask */ 221 FALSE), /* pcrel_offset */ 222 223 HOWTO (R_VAX_JMP_SLOT, /* type */ 224 0, /* rightshift */ 225 2, /* size (0 = byte, 1 = short, 2 = long) */ 226 32, /* bitsize */ 227 FALSE, /* pc_relative */ 228 0, /* bitpos */ 229 complain_overflow_dont, /* complain_on_overflow */ 230 bfd_elf_generic_reloc, /* special_function */ 231 "R_VAX_JMP_SLOT", /* name */ 232 FALSE, /* partial_inplace */ 233 0, /* src_mask */ 234 0xffffffff, /* dst_mask */ 235 FALSE), /* pcrel_offset */ 236 237 HOWTO (R_VAX_RELATIVE, /* type */ 238 0, /* rightshift */ 239 2, /* size (0 = byte, 1 = short, 2 = long) */ 240 32, /* bitsize */ 241 FALSE, /* pc_relative */ 242 0, /* bitpos */ 243 complain_overflow_dont, /* complain_on_overflow */ 244 bfd_elf_generic_reloc, /* special_function */ 245 "R_VAX_RELATIVE", /* name */ 246 FALSE, /* partial_inplace */ 247 0, /* src_mask */ 248 0xffffffff, /* dst_mask */ 249 FALSE), /* pcrel_offset */ 250 251 /* GNU extension to record C++ vtable hierarchy */ 252 HOWTO (R_VAX_GNU_VTINHERIT, /* type */ 253 0, /* rightshift */ 254 2, /* size (0 = byte, 1 = short, 2 = long) */ 255 0, /* bitsize */ 256 FALSE, /* pc_relative */ 257 0, /* bitpos */ 258 complain_overflow_dont, /* complain_on_overflow */ 259 NULL, /* special_function */ 260 "R_VAX_GNU_VTINHERIT", /* name */ 261 FALSE, /* partial_inplace */ 262 0, /* src_mask */ 263 0, /* dst_mask */ 264 FALSE), /* pcrel_offset */ 265 266 /* GNU extension to record C++ vtable member usage */ 267 HOWTO (R_VAX_GNU_VTENTRY, /* type */ 268 0, /* rightshift */ 269 2, /* size (0 = byte, 1 = short, 2 = long) */ 270 0, /* bitsize */ 271 FALSE, /* pc_relative */ 272 0, /* bitpos */ 273 complain_overflow_dont, /* complain_on_overflow */ 274 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 275 "R_VAX_GNU_VTENTRY", /* name */ 276 FALSE, /* partial_inplace */ 277 0, /* src_mask */ 278 0, /* dst_mask */ 279 FALSE), /* pcrel_offset */ 280 }; 281 282 static void 283 rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, 284 Elf_Internal_Rela *dst) 285 { 286 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max); 287 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)]; 288 } 289 290 #define elf_info_to_howto rtype_to_howto 291 292 static const struct 293 { 294 bfd_reloc_code_real_type bfd_val; 295 int elf_val; 296 } reloc_map[] = { 297 { BFD_RELOC_NONE, R_VAX_NONE }, 298 { BFD_RELOC_32, R_VAX_32 }, 299 { BFD_RELOC_16, R_VAX_16 }, 300 { BFD_RELOC_8, R_VAX_8 }, 301 { BFD_RELOC_32_PCREL, R_VAX_PC32 }, 302 { BFD_RELOC_16_PCREL, R_VAX_PC16 }, 303 { BFD_RELOC_8_PCREL, R_VAX_PC8 }, 304 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 }, 305 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 }, 306 { BFD_RELOC_NONE, R_VAX_COPY }, 307 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT }, 308 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT }, 309 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE }, 310 { BFD_RELOC_CTOR, R_VAX_32 }, 311 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT }, 312 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY }, 313 }; 314 315 static reloc_howto_type * 316 reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code) 317 { 318 unsigned int i; 319 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++) 320 { 321 if (reloc_map[i].bfd_val == code) 322 return &howto_table[reloc_map[i].elf_val]; 323 } 324 return 0; 325 } 326 327 static reloc_howto_type * 328 reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 329 const char *r_name) 330 { 331 unsigned int i; 332 333 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++) 334 if (howto_table[i].name != NULL 335 && strcasecmp (howto_table[i].name, r_name) == 0) 336 return &howto_table[i]; 337 338 return NULL; 339 } 340 341 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup 342 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup 343 #define ELF_ARCH bfd_arch_vax 344 /* end code generated by elf.el */ 345 346 /* Functions for the VAX ELF linker. */ 348 349 /* The name of the dynamic interpreter. This is put in the .interp 350 section. */ 351 352 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so" 353 354 /* The size in bytes of an entry in the procedure linkage table. */ 355 356 #define PLT_ENTRY_SIZE 12 357 358 /* The first entry in a procedure linkage table looks like this. See 359 the SVR4 ABI VAX supplement to see how this works. */ 360 361 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] = 362 { 363 0xdd, 0xef, /* pushl l^ */ 364 0, 0, 0, 0, /* offset to .plt.got + 4 */ 365 0x17, 0xff, /* jmp @L^(pc) */ 366 0, 0, 0, 0, /* offset to .plt.got + 8 */ 367 }; 368 369 /* Subsequent entries in a procedure linkage table look like this. */ 370 371 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] = 372 { 373 0xfc, 0x0f, /* .word ^M<r11:r2> */ 374 0x16, 0xef, /* jsb L^(pc) */ 375 0, 0, 0, 0, /* replaced with offset to start of .plt */ 376 0, 0, 0, 0, /* index into .rela.plt */ 377 }; 378 379 /* The VAX linker needs to keep track of the number of relocs that it 380 decides to copy in check_relocs for each symbol. This is so that it 381 can discard PC relative relocs if it doesn't need them when linking 382 with -Bsymbolic. We store the information in a field extending the 383 regular ELF linker hash table. */ 384 385 /* This structure keeps track of the number of PC relative relocs we have 386 copied for a given symbol. */ 387 388 struct elf_vax_pcrel_relocs_copied 389 { 390 /* Next section. */ 391 struct elf_vax_pcrel_relocs_copied *next; 392 /* A section in dynobj. */ 393 asection *section; 394 /* Number of relocs copied in this section. */ 395 bfd_size_type count; 396 }; 397 398 /* VAX ELF linker hash entry. */ 399 400 struct elf_vax_link_hash_entry 401 { 402 struct elf_link_hash_entry root; 403 404 /* Number of PC relative relocs copied for this symbol. */ 405 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied; 406 407 bfd_vma got_addend; 408 }; 409 410 /* Declare this now that the above structures are defined. */ 411 412 static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *, 413 void *); 414 415 /* Declare this now that the above structures are defined. */ 416 417 static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *, 418 void *); 419 420 /* Traverse an VAX ELF linker hash table. */ 421 422 #define elf_vax_link_hash_traverse(table, func, info) \ 423 (elf_link_hash_traverse \ 424 ((table), \ 425 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ 426 (info))) 427 428 /* Create an entry in an VAX ELF linker hash table. */ 429 430 static struct bfd_hash_entry * 431 elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry, 432 struct bfd_hash_table *table, 433 const char *string) 434 { 435 struct elf_vax_link_hash_entry *ret = 436 (struct elf_vax_link_hash_entry *) entry; 437 438 /* Allocate the structure if it has not already been allocated by a 439 subclass. */ 440 if (ret == NULL) 441 ret = ((struct elf_vax_link_hash_entry *) 442 bfd_hash_allocate (table, 443 sizeof (struct elf_vax_link_hash_entry))); 444 if (ret == NULL) 445 return (struct bfd_hash_entry *) ret; 446 447 /* Call the allocation method of the superclass. */ 448 ret = ((struct elf_vax_link_hash_entry *) 449 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, 450 table, string)); 451 if (ret != NULL) 452 { 453 ret->pcrel_relocs_copied = NULL; 454 } 455 456 return (struct bfd_hash_entry *) ret; 457 } 458 459 /* Create an VAX ELF linker hash table. */ 460 461 static struct bfd_link_hash_table * 462 elf_vax_link_hash_table_create (bfd *abfd) 463 { 464 struct elf_link_hash_table *ret; 465 bfd_size_type amt = sizeof (struct elf_link_hash_table); 466 467 ret = bfd_zmalloc (amt); 468 if (ret == NULL) 469 return NULL; 470 471 if (!_bfd_elf_link_hash_table_init (ret, abfd, 472 elf_vax_link_hash_newfunc, 473 sizeof (struct elf_vax_link_hash_entry), 474 GENERIC_ELF_DATA)) 475 { 476 free (ret); 477 return NULL; 478 } 479 480 return &ret->root; 481 } 482 483 /* Keep vax-specific flags in the ELF header */ 484 static bfd_boolean 485 elf32_vax_set_private_flags (bfd *abfd, flagword flags) 486 { 487 elf_elfheader (abfd)->e_flags = flags; 488 elf_flags_init (abfd) = TRUE; 489 return TRUE; 490 } 491 492 /* Merge backend specific data from an object file to the output 493 object file when linking. */ 494 static bfd_boolean 495 elf32_vax_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 496 { 497 flagword in_flags; 498 499 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour 500 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 501 return TRUE; 502 503 in_flags = elf_elfheader (ibfd)->e_flags; 504 505 if (!elf_flags_init (obfd)) 506 { 507 elf_flags_init (obfd) = TRUE; 508 elf_elfheader (obfd)->e_flags = in_flags; 509 } 510 511 return TRUE; 512 } 513 514 /* Display the flags field */ 515 static bfd_boolean 516 elf32_vax_print_private_bfd_data (bfd *abfd, void * ptr) 517 { 518 FILE *file = (FILE *) ptr; 519 520 BFD_ASSERT (abfd != NULL && ptr != NULL); 521 522 /* Print normal ELF private data. */ 523 _bfd_elf_print_private_bfd_data (abfd, ptr); 524 525 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */ 526 527 /* xgettext:c-format */ 528 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); 529 530 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC) 531 fprintf (file, _(" [nonpic]")); 532 533 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT) 534 fprintf (file, _(" [d-float]")); 535 536 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT) 537 fprintf (file, _(" [g-float]")); 538 539 fputc ('\n', file); 540 541 return TRUE; 542 } 543 /* Look through the relocs for a section during the first phase, and 544 allocate space in the global offset table or procedure linkage 545 table. */ 546 547 static bfd_boolean 548 elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec, 549 const Elf_Internal_Rela *relocs) 550 { 551 bfd *dynobj; 552 Elf_Internal_Shdr *symtab_hdr; 553 struct elf_link_hash_entry **sym_hashes; 554 const Elf_Internal_Rela *rel; 555 const Elf_Internal_Rela *rel_end; 556 asection *sgot; 557 asection *srelgot; 558 asection *sreloc; 559 560 if (info->relocatable) 561 return TRUE; 562 563 dynobj = elf_hash_table (info)->dynobj; 564 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 565 sym_hashes = elf_sym_hashes (abfd); 566 567 sgot = NULL; 568 srelgot = NULL; 569 sreloc = NULL; 570 571 rel_end = relocs + sec->reloc_count; 572 for (rel = relocs; rel < rel_end; rel++) 573 { 574 unsigned long r_symndx; 575 struct elf_link_hash_entry *h; 576 577 r_symndx = ELF32_R_SYM (rel->r_info); 578 579 if (r_symndx < symtab_hdr->sh_info) 580 h = NULL; 581 else 582 { 583 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 584 while (h->root.type == bfd_link_hash_indirect 585 || h->root.type == bfd_link_hash_warning) 586 h = (struct elf_link_hash_entry *) h->root.u.i.link; 587 588 /* PR15323, ref flags aren't set for references in the same 589 object. */ 590 h->root.non_ir_ref = 1; 591 } 592 593 switch (ELF32_R_TYPE (rel->r_info)) 594 { 595 case R_VAX_GOT32: 596 BFD_ASSERT (h != NULL); 597 598 /* If this is a local symbol, we resolve it directly without 599 creating a global offset table entry. */ 600 if (h->forced_local 601 || h == elf_hash_table (info)->hgot 602 || h == elf_hash_table (info)->hplt) 603 break; 604 605 /* This symbol requires a global offset table entry. */ 606 607 if (dynobj == NULL) 608 { 609 /* Create the .got section. */ 610 elf_hash_table (info)->dynobj = dynobj = abfd; 611 if (!_bfd_elf_create_got_section (dynobj, info)) 612 return FALSE; 613 } 614 615 if (sgot == NULL) 616 { 617 sgot = bfd_get_linker_section (dynobj, ".got"); 618 BFD_ASSERT (sgot != NULL); 619 } 620 621 if (srelgot == NULL 622 && (h != NULL || info->shared)) 623 { 624 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 625 if (srelgot == NULL) 626 { 627 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 628 | SEC_IN_MEMORY | SEC_LINKER_CREATED 629 | SEC_READONLY); 630 631 srelgot = bfd_make_section_anyway_with_flags (dynobj, 632 ".rela.got", 633 flags); 634 if (srelgot == NULL 635 || !bfd_set_section_alignment (dynobj, srelgot, 2)) 636 return FALSE; 637 } 638 } 639 640 if (h != NULL) 641 { 642 struct elf_vax_link_hash_entry *eh; 643 644 eh = (struct elf_vax_link_hash_entry *) h; 645 if (h->got.refcount == -1) 646 { 647 h->got.refcount = 1; 648 eh->got_addend = rel->r_addend; 649 } 650 else 651 { 652 h->got.refcount++; 653 if (eh->got_addend != (bfd_vma) rel->r_addend) 654 (*_bfd_error_handler) 655 (_("%s: warning: GOT addend of %ld to `%s' does" 656 " not match previous GOT addend of %ld"), 657 bfd_get_filename (abfd), rel->r_addend, 658 h->root.root.string, 659 eh->got_addend); 660 661 } 662 } 663 break; 664 665 case R_VAX_PLT32: 666 /* This symbol requires a procedure linkage table entry. We 667 actually build the entry in adjust_dynamic_symbol, 668 because this might be a case of linking PIC code which is 669 never referenced by a dynamic object, in which case we 670 don't need to generate a procedure linkage table entry 671 after all. */ 672 BFD_ASSERT (h != NULL); 673 674 /* If this is a local symbol, we resolve it directly without 675 creating a procedure linkage table entry. */ 676 if (h->forced_local) 677 break; 678 679 h->needs_plt = 1; 680 if (h->plt.refcount == -1) 681 h->plt.refcount = 1; 682 else 683 h->plt.refcount++; 684 break; 685 686 case R_VAX_PC8: 687 case R_VAX_PC16: 688 case R_VAX_PC32: 689 /* If we are creating a shared library and this is not a local 690 symbol, we need to copy the reloc into the shared library. 691 However when linking with -Bsymbolic and this is a global 692 symbol which is defined in an object we are including in the 693 link (i.e., DEF_REGULAR is set), then we can resolve the 694 reloc directly. At this point we have not seen all the input 695 files, so it is possible that DEF_REGULAR is not set now but 696 will be set later (it is never cleared). We account for that 697 possibility below by storing information in the 698 pcrel_relocs_copied field of the hash table entry. */ 699 if (!(info->shared 700 && (sec->flags & SEC_ALLOC) != 0 701 && h != NULL 702 && (!info->symbolic 703 || !h->def_regular))) 704 { 705 if (h != NULL 706 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 707 && !h->forced_local) 708 { 709 /* Make sure a plt entry is created for this symbol if 710 it turns out to be a function defined by a dynamic 711 object. */ 712 if (h->plt.refcount == -1) 713 h->plt.refcount = 1; 714 else 715 h->plt.refcount++; 716 } 717 break; 718 } 719 /* If this is a local symbol, we can resolve it directly. */ 720 if (h != NULL 721 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 722 || h->forced_local)) 723 break; 724 725 /* Fall through. */ 726 case R_VAX_8: 727 case R_VAX_16: 728 case R_VAX_32: 729 if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) 730 { 731 /* Make sure a plt entry is created for this symbol if it 732 turns out to be a function defined by a dynamic object. */ 733 if (h->plt.refcount == -1) 734 h->plt.refcount = 1; 735 else 736 h->plt.refcount++; 737 } 738 739 /* If we are creating a shared library, we need to copy the 740 reloc into the shared library. */ 741 if (info->shared 742 && (sec->flags & SEC_ALLOC) != 0) 743 { 744 /* When creating a shared object, we must copy these 745 reloc types into the output file. We create a reloc 746 section in dynobj and make room for this reloc. */ 747 if (sreloc == NULL) 748 { 749 sreloc = _bfd_elf_make_dynamic_reloc_section 750 (sec, dynobj, 2, abfd, /*rela?*/ TRUE); 751 752 if (sreloc == NULL) 753 return FALSE; 754 755 if (sec->flags & SEC_READONLY) 756 info->flags |= DF_TEXTREL; 757 } 758 759 sreloc->size += sizeof (Elf32_External_Rela); 760 761 /* If we are linking with -Bsymbolic, we count the number of 762 PC relative relocations we have entered for this symbol, 763 so that we can discard them again if the symbol is later 764 defined by a regular object. Note that this function is 765 only called if we are using a vaxelf linker hash table, 766 which means that h is really a pointer to an 767 elf_vax_link_hash_entry. */ 768 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8 769 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16 770 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32) 771 && info->symbolic) 772 { 773 struct elf_vax_link_hash_entry *eh; 774 struct elf_vax_pcrel_relocs_copied *p; 775 776 eh = (struct elf_vax_link_hash_entry *) h; 777 778 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) 779 if (p->section == sreloc) 780 break; 781 782 if (p == NULL) 783 { 784 p = ((struct elf_vax_pcrel_relocs_copied *) 785 bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); 786 if (p == NULL) 787 return FALSE; 788 p->next = eh->pcrel_relocs_copied; 789 eh->pcrel_relocs_copied = p; 790 p->section = sreloc; 791 p->count = 0; 792 } 793 794 ++p->count; 795 } 796 } 797 798 break; 799 800 /* This relocation describes the C++ object vtable hierarchy. 801 Reconstruct it for later use during GC. */ 802 case R_VAX_GNU_VTINHERIT: 803 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 804 return FALSE; 805 break; 806 807 /* This relocation describes which C++ vtable entries are actually 808 used. Record for later use during GC. */ 809 case R_VAX_GNU_VTENTRY: 810 BFD_ASSERT (h != NULL); 811 if (h != NULL 812 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 813 return FALSE; 814 break; 815 816 default: 817 break; 818 } 819 } 820 821 return TRUE; 822 } 823 824 /* Return the section that should be marked against GC for a given 825 relocation. */ 826 827 static asection * 828 elf_vax_gc_mark_hook (asection *sec, 829 struct bfd_link_info *info, 830 Elf_Internal_Rela *rel, 831 struct elf_link_hash_entry *h, 832 Elf_Internal_Sym *sym) 833 { 834 if (h != NULL) 835 switch (ELF32_R_TYPE (rel->r_info)) 836 { 837 case R_VAX_GNU_VTINHERIT: 838 case R_VAX_GNU_VTENTRY: 839 return NULL; 840 } 841 842 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 843 } 844 845 /* Update the got entry reference counts for the section being removed. */ 846 847 static bfd_boolean 848 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec, 849 const Elf_Internal_Rela *relocs) 850 { 851 Elf_Internal_Shdr *symtab_hdr; 852 struct elf_link_hash_entry **sym_hashes; 853 const Elf_Internal_Rela *rel, *relend; 854 bfd *dynobj; 855 856 if (info->relocatable) 857 return TRUE; 858 859 dynobj = elf_hash_table (info)->dynobj; 860 if (dynobj == NULL) 861 return TRUE; 862 863 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 864 sym_hashes = elf_sym_hashes (abfd); 865 866 relend = relocs + sec->reloc_count; 867 for (rel = relocs; rel < relend; rel++) 868 { 869 unsigned long r_symndx; 870 struct elf_link_hash_entry *h = NULL; 871 872 r_symndx = ELF32_R_SYM (rel->r_info); 873 if (r_symndx >= symtab_hdr->sh_info) 874 { 875 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 876 while (h->root.type == bfd_link_hash_indirect 877 || h->root.type == bfd_link_hash_warning) 878 h = (struct elf_link_hash_entry *) h->root.u.i.link; 879 } 880 881 switch (ELF32_R_TYPE (rel->r_info)) 882 { 883 case R_VAX_GOT32: 884 if (h != NULL && h->got.refcount > 0) 885 --h->got.refcount; 886 break; 887 888 case R_VAX_PLT32: 889 case R_VAX_PC8: 890 case R_VAX_PC16: 891 case R_VAX_PC32: 892 case R_VAX_8: 893 case R_VAX_16: 894 case R_VAX_32: 895 if (h != NULL && h->plt.refcount > 0) 896 --h->plt.refcount; 897 break; 898 899 default: 900 break; 901 } 902 } 903 904 return TRUE; 905 } 906 907 /* Adjust a symbol defined by a dynamic object and referenced by a 908 regular object. The current definition is in some section of the 909 dynamic object, but we're not including those sections. We have to 910 change the definition to something the rest of the link can 911 understand. */ 912 913 static bfd_boolean 914 elf_vax_adjust_dynamic_symbol (struct bfd_link_info *info, 915 struct elf_link_hash_entry *h) 916 { 917 bfd *dynobj; 918 asection *s; 919 920 dynobj = elf_hash_table (info)->dynobj; 921 922 /* Make sure we know what is going on here. */ 923 BFD_ASSERT (dynobj != NULL 924 && (h->needs_plt 925 || h->u.weakdef != NULL 926 || (h->def_dynamic 927 && h->ref_regular 928 && !h->def_regular))); 929 930 /* If this is a function, put it in the procedure linkage table. We 931 will fill in the contents of the procedure linkage table later, 932 when we know the address of the .got section. */ 933 if (h->type == STT_FUNC 934 || h->needs_plt) 935 { 936 if (h->plt.refcount <= 0 937 || SYMBOL_CALLS_LOCAL (info, h) 938 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 939 && h->root.type == bfd_link_hash_undefweak)) 940 { 941 /* This case can occur if we saw a PLTxx reloc in an input 942 file, but the symbol was never referred to by a dynamic 943 object, or if all references were garbage collected. In 944 such a case, we don't actually need to build a procedure 945 linkage table, and we can just do a PCxx reloc instead. */ 946 h->plt.offset = (bfd_vma) -1; 947 h->needs_plt = 0; 948 return TRUE; 949 } 950 951 s = bfd_get_linker_section (dynobj, ".plt"); 952 BFD_ASSERT (s != NULL); 953 954 /* If this is the first .plt entry, make room for the special 955 first entry. */ 956 if (s->size == 0) 957 { 958 s->size += PLT_ENTRY_SIZE; 959 } 960 961 /* If this symbol is not defined in a regular file, and we are 962 not generating a shared library, then set the symbol to this 963 location in the .plt. This is required to make function 964 pointers compare as equal between the normal executable and 965 the shared library. */ 966 if (!info->shared 967 && !h->def_regular) 968 { 969 h->root.u.def.section = s; 970 h->root.u.def.value = s->size; 971 } 972 973 h->plt.offset = s->size; 974 975 /* Make room for this entry. */ 976 s->size += PLT_ENTRY_SIZE; 977 978 /* We also need to make an entry in the .got.plt section, which 979 will be placed in the .got section by the linker script. */ 980 981 s = bfd_get_linker_section (dynobj, ".got.plt"); 982 BFD_ASSERT (s != NULL); 983 s->size += 4; 984 985 /* We also need to make an entry in the .rela.plt section. */ 986 987 s = bfd_get_linker_section (dynobj, ".rela.plt"); 988 BFD_ASSERT (s != NULL); 989 s->size += sizeof (Elf32_External_Rela); 990 991 return TRUE; 992 } 993 994 /* Reinitialize the plt offset now that it is not used as a reference 995 count any more. */ 996 h->plt.offset = (bfd_vma) -1; 997 998 /* If this is a weak symbol, and there is a real definition, the 999 processor independent code will have arranged for us to see the 1000 real definition first, and we can just use the same value. */ 1001 if (h->u.weakdef != NULL) 1002 { 1003 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 1004 || h->u.weakdef->root.type == bfd_link_hash_defweak); 1005 h->root.u.def.section = h->u.weakdef->root.u.def.section; 1006 h->root.u.def.value = h->u.weakdef->root.u.def.value; 1007 return TRUE; 1008 } 1009 1010 /* This is a reference to a symbol defined by a dynamic object which 1011 is not a function. */ 1012 1013 /* If we are creating a shared library, we must presume that the 1014 only references to the symbol are via the global offset table. 1015 For such cases we need not do anything here; the relocations will 1016 be handled correctly by relocate_section. */ 1017 if (info->shared) 1018 return TRUE; 1019 1020 /* We must allocate the symbol in our .dynbss section, which will 1021 become part of the .bss section of the executable. There will be 1022 an entry for this symbol in the .dynsym section. The dynamic 1023 object will contain position independent code, so all references 1024 from the dynamic object to this symbol will go through the global 1025 offset table. The dynamic linker will use the .dynsym entry to 1026 determine the address it must put in the global offset table, so 1027 both the dynamic object and the regular object will refer to the 1028 same memory location for the variable. */ 1029 1030 s = bfd_get_linker_section (dynobj, ".dynbss"); 1031 BFD_ASSERT (s != NULL); 1032 1033 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to 1034 copy the initial value out of the dynamic object and into the 1035 runtime process image. We need to remember the offset into the 1036 .rela.bss section we are going to use. */ 1037 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 1038 { 1039 asection *srel; 1040 1041 srel = bfd_get_linker_section (dynobj, ".rela.bss"); 1042 BFD_ASSERT (srel != NULL); 1043 srel->size += sizeof (Elf32_External_Rela); 1044 h->needs_copy = 1; 1045 } 1046 1047 return _bfd_elf_adjust_dynamic_copy (h, s); 1048 } 1049 1050 /* This function is called via elf_link_hash_traverse. It resets GOT 1051 and PLT (.GOT) reference counts back to -1 so normal PC32 relocation 1052 will be done. */ 1053 1054 static bfd_boolean 1055 elf_vax_discard_got_entries (struct elf_link_hash_entry *h, 1056 void *infoptr ATTRIBUTE_UNUSED) 1057 { 1058 h->got.refcount = -1; 1059 h->plt.refcount = -1; 1060 1061 return TRUE; 1062 } 1063 1064 /* Discard unused dynamic data if this is a static link. */ 1065 1066 static bfd_boolean 1067 elf_vax_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 1068 struct bfd_link_info *info) 1069 { 1070 bfd *dynobj; 1071 asection *s; 1072 1073 dynobj = elf_hash_table (info)->dynobj; 1074 1075 if (dynobj && !elf_hash_table (info)->dynamic_sections_created) 1076 { 1077 /* We may have created entries in the .rela.got and .got sections. 1078 However, if we are not creating the dynamic sections, we will 1079 not actually use these entries. Reset the size of .rela.got 1080 and .got, which will cause them to get stripped from the output 1081 file below. */ 1082 s = bfd_get_linker_section (dynobj, ".rela.got"); 1083 if (s != NULL) 1084 s->size = 0; 1085 s = bfd_get_linker_section (dynobj, ".got.plt"); 1086 if (s != NULL) 1087 s->size = 0; 1088 s = bfd_get_linker_section (dynobj, ".got"); 1089 if (s != NULL) 1090 s->size = 0; 1091 } 1092 1093 /* If this is a static link, we need to discard all the got entries we've 1094 recorded. */ 1095 if (!dynobj || !elf_hash_table (info)->dynamic_sections_created) 1096 elf_link_hash_traverse (elf_hash_table (info), 1097 elf_vax_discard_got_entries, 1098 info); 1099 1100 return TRUE; 1101 } 1102 1103 /* Set the sizes of the dynamic sections. */ 1104 1105 static bfd_boolean 1106 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) 1107 { 1108 bfd *dynobj; 1109 asection *s; 1110 bfd_boolean plt; 1111 bfd_boolean relocs; 1112 bfd_boolean reltext; 1113 1114 dynobj = elf_hash_table (info)->dynobj; 1115 BFD_ASSERT (dynobj != NULL); 1116 1117 if (elf_hash_table (info)->dynamic_sections_created) 1118 { 1119 /* Set the contents of the .interp section to the interpreter. */ 1120 if (info->executable) 1121 { 1122 s = bfd_get_linker_section (dynobj, ".interp"); 1123 BFD_ASSERT (s != NULL); 1124 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 1125 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 1126 } 1127 } 1128 1129 /* If this is a -Bsymbolic shared link, then we need to discard all PC 1130 relative relocs against symbols defined in a regular object. We 1131 allocated space for them in the check_relocs routine, but we will not 1132 fill them in in the relocate_section routine. */ 1133 if (info->shared && info->symbolic) 1134 elf_vax_link_hash_traverse (elf_hash_table (info), 1135 elf_vax_discard_copies, 1136 NULL); 1137 1138 /* If this is a -Bsymbolic shared link, we need to discard all the got 1139 entries we've recorded. Otherwise, we need to instantiate (allocate 1140 space for them). */ 1141 elf_link_hash_traverse (elf_hash_table (info), 1142 elf_vax_instantiate_got_entries, 1143 info); 1144 1145 /* The check_relocs and adjust_dynamic_symbol entry points have 1146 determined the sizes of the various dynamic sections. Allocate 1147 memory for them. */ 1148 plt = FALSE; 1149 relocs = FALSE; 1150 reltext = FALSE; 1151 for (s = dynobj->sections; s != NULL; s = s->next) 1152 { 1153 const char *name; 1154 1155 if ((s->flags & SEC_LINKER_CREATED) == 0) 1156 continue; 1157 1158 /* It's OK to base decisions on the section name, because none 1159 of the dynobj section names depend upon the input files. */ 1160 name = bfd_get_section_name (dynobj, s); 1161 1162 if (strcmp (name, ".plt") == 0) 1163 { 1164 /* Remember whether there is a PLT. */ 1165 plt = s->size != 0; 1166 } 1167 else if (CONST_STRNEQ (name, ".rela")) 1168 { 1169 if (s->size != 0) 1170 { 1171 asection *target; 1172 1173 /* Remember whether there are any reloc sections other 1174 than .rela.plt. */ 1175 if (strcmp (name, ".rela.plt") != 0) 1176 { 1177 const char *outname; 1178 1179 relocs = TRUE; 1180 1181 /* If this relocation section applies to a read only 1182 section, then we probably need a DT_TEXTREL 1183 entry. .rela.plt is actually associated with 1184 .got.plt, which is never readonly. */ 1185 outname = bfd_get_section_name (output_bfd, 1186 s->output_section); 1187 target = bfd_get_section_by_name (output_bfd, outname + 5); 1188 if (target != NULL 1189 && (target->flags & SEC_READONLY) != 0 1190 && (target->flags & SEC_ALLOC) != 0) 1191 reltext = TRUE; 1192 } 1193 1194 /* We use the reloc_count field as a counter if we need 1195 to copy relocs into the output file. */ 1196 s->reloc_count = 0; 1197 } 1198 } 1199 else if (! CONST_STRNEQ (name, ".got") 1200 && strcmp (name, ".dynbss") != 0) 1201 { 1202 /* It's not one of our sections, so don't allocate space. */ 1203 continue; 1204 } 1205 1206 if (s->size == 0) 1207 { 1208 /* If we don't need this section, strip it from the 1209 output file. This is mostly to handle .rela.bss and 1210 .rela.plt. We must create both sections in 1211 create_dynamic_sections, because they must be created 1212 before the linker maps input sections to output 1213 sections. The linker does that before 1214 adjust_dynamic_symbol is called, and it is that 1215 function which decides whether anything needs to go 1216 into these sections. */ 1217 s->flags |= SEC_EXCLUDE; 1218 continue; 1219 } 1220 1221 if ((s->flags & SEC_HAS_CONTENTS) == 0) 1222 continue; 1223 1224 /* Allocate memory for the section contents. */ 1225 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 1226 if (s->contents == NULL) 1227 return FALSE; 1228 } 1229 1230 if (elf_hash_table (info)->dynamic_sections_created) 1231 { 1232 /* Add some entries to the .dynamic section. We fill in the 1233 values later, in elf_vax_finish_dynamic_sections, but we 1234 must add the entries now so that we get the correct size for 1235 the .dynamic section. The DT_DEBUG entry is filled in by the 1236 dynamic linker and used by the debugger. */ 1237 #define add_dynamic_entry(TAG, VAL) \ 1238 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 1239 1240 if (!info->shared) 1241 { 1242 if (!add_dynamic_entry (DT_DEBUG, 0)) 1243 return FALSE; 1244 } 1245 1246 if (plt) 1247 { 1248 if (!add_dynamic_entry (DT_PLTGOT, 0) 1249 || !add_dynamic_entry (DT_PLTRELSZ, 0) 1250 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 1251 || !add_dynamic_entry (DT_JMPREL, 0)) 1252 return FALSE; 1253 } 1254 1255 if (relocs) 1256 { 1257 if (!add_dynamic_entry (DT_RELA, 0) 1258 || !add_dynamic_entry (DT_RELASZ, 0) 1259 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 1260 return FALSE; 1261 } 1262 1263 if (reltext || (info->flags & DF_TEXTREL) != 0) 1264 { 1265 if (!add_dynamic_entry (DT_TEXTREL, 0)) 1266 return FALSE; 1267 } 1268 } 1269 #undef add_dynamic_entry 1270 1271 return TRUE; 1272 } 1273 1274 /* This function is called via elf_vax_link_hash_traverse if we are 1275 creating a shared object with -Bsymbolic. It discards the space 1276 allocated to copy PC relative relocs against symbols which are defined 1277 in regular objects. We allocated space for them in the check_relocs 1278 routine, but we won't fill them in in the relocate_section routine. */ 1279 1280 static bfd_boolean 1281 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h, 1282 void * ignore ATTRIBUTE_UNUSED) 1283 { 1284 struct elf_vax_pcrel_relocs_copied *s; 1285 1286 /* We only discard relocs for symbols defined in a regular object. */ 1287 if (!h->root.def_regular) 1288 return TRUE; 1289 1290 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) 1291 s->section->size -= s->count * sizeof (Elf32_External_Rela); 1292 1293 return TRUE; 1294 } 1295 1296 /* This function is called via elf_link_hash_traverse. It looks for 1297 entries that have GOT or PLT (.GOT) references. If creating a shared 1298 object with -Bsymbolic, or the symbol has been forced local, then it 1299 resets the reference count back to -1 so normal PC32 relocation will 1300 be done. Otherwise space in the .got and .rela.got will be reserved 1301 for the symbol. */ 1302 1303 static bfd_boolean 1304 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, void * infoptr) 1305 { 1306 struct bfd_link_info *info = (struct bfd_link_info *) infoptr; 1307 bfd *dynobj; 1308 asection *sgot; 1309 asection *srelgot; 1310 1311 /* We don't care about non-GOT (and non-PLT) entries. */ 1312 if (h->got.refcount <= 0 && h->plt.refcount <= 0) 1313 return TRUE; 1314 1315 dynobj = elf_hash_table (info)->dynobj; 1316 BFD_ASSERT (dynobj != NULL); 1317 1318 sgot = bfd_get_linker_section (dynobj, ".got"); 1319 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 1320 1321 if (SYMBOL_REFERENCES_LOCAL (info, h)) 1322 { 1323 h->got.refcount = -1; 1324 h->plt.refcount = -1; 1325 } 1326 else if (h->got.refcount > 0) 1327 { 1328 /* Make sure this symbol is output as a dynamic symbol. */ 1329 if (h->dynindx == -1) 1330 { 1331 if (!bfd_elf_link_record_dynamic_symbol (info, h)) 1332 return FALSE; 1333 } 1334 1335 /* Allocate space in the .got and .rela.got sections. */ 1336 sgot->size += 4; 1337 srelgot->size += sizeof (Elf32_External_Rela); 1338 } 1339 1340 return TRUE; 1341 } 1342 1343 /* Relocate an VAX ELF section. */ 1344 1345 static bfd_boolean 1346 elf_vax_relocate_section (bfd *output_bfd, 1347 struct bfd_link_info *info, 1348 bfd *input_bfd, 1349 asection *input_section, 1350 bfd_byte *contents, 1351 Elf_Internal_Rela *relocs, 1352 Elf_Internal_Sym *local_syms, 1353 asection **local_sections) 1354 { 1355 bfd *dynobj; 1356 Elf_Internal_Shdr *symtab_hdr; 1357 struct elf_link_hash_entry **sym_hashes; 1358 bfd_vma plt_index; 1359 bfd_vma got_offset; 1360 asection *sgot; 1361 asection *splt; 1362 asection *sgotplt; 1363 asection *sreloc; 1364 Elf_Internal_Rela *rel; 1365 Elf_Internal_Rela *relend; 1366 1367 dynobj = elf_hash_table (info)->dynobj; 1368 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 1369 sym_hashes = elf_sym_hashes (input_bfd); 1370 1371 sgot = NULL; 1372 splt = NULL; 1373 sgotplt = NULL; 1374 sreloc = NULL; 1375 1376 rel = relocs; 1377 relend = relocs + input_section->reloc_count; 1378 for (; rel < relend; rel++) 1379 { 1380 int r_type; 1381 reloc_howto_type *howto; 1382 unsigned long r_symndx; 1383 struct elf_link_hash_entry *h; 1384 Elf_Internal_Sym *sym; 1385 asection *sec; 1386 bfd_vma relocation; 1387 bfd_reloc_status_type r; 1388 1389 r_type = ELF32_R_TYPE (rel->r_info); 1390 if (r_type < 0 || r_type >= (int) R_VAX_max) 1391 { 1392 bfd_set_error (bfd_error_bad_value); 1393 return FALSE; 1394 } 1395 howto = howto_table + r_type; 1396 1397 r_symndx = ELF32_R_SYM (rel->r_info); 1398 h = NULL; 1399 sym = NULL; 1400 sec = NULL; 1401 if (r_symndx < symtab_hdr->sh_info) 1402 { 1403 sym = local_syms + r_symndx; 1404 sec = local_sections[r_symndx]; 1405 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 1406 } 1407 else 1408 { 1409 bfd_boolean unresolved_reloc; 1410 bfd_boolean warned, ignored; 1411 1412 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 1413 r_symndx, symtab_hdr, sym_hashes, 1414 h, sec, relocation, 1415 unresolved_reloc, warned, ignored); 1416 1417 if ((h->root.type == bfd_link_hash_defined 1418 || h->root.type == bfd_link_hash_defweak) 1419 && ((r_type == R_VAX_PLT32 1420 && h->plt.offset != (bfd_vma) -1 1421 && !h->forced_local 1422 && elf_hash_table (info)->dynamic_sections_created) 1423 || (r_type == R_VAX_GOT32 1424 && h->got.offset != (bfd_vma) -1 1425 && !h->forced_local 1426 && elf_hash_table (info)->dynamic_sections_created 1427 && (! info->shared 1428 || (! info->symbolic && h->dynindx != -1) 1429 || !h->def_regular)) 1430 || (info->shared 1431 && ((! info->symbolic && h->dynindx != -1) 1432 || !h->def_regular) 1433 && ((input_section->flags & SEC_ALLOC) != 0 1434 /* DWARF will emit R_VAX_32 relocations in its 1435 sections against symbols defined externally 1436 in shared libraries. We can't do anything 1437 with them here. */ 1438 1439 || ((input_section->flags & SEC_DEBUGGING) != 0 1440 && h->def_dynamic)) 1441 && (r_type == R_VAX_8 1442 || r_type == R_VAX_16 1443 || r_type == R_VAX_32)))) 1444 /* In these cases, we don't need the relocation 1445 value. We check specially because in some 1446 obscure cases sec->output_section will be NULL. */ 1447 relocation = 0; 1448 } 1449 1450 if (sec != NULL && discarded_section (sec)) 1451 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 1452 rel, 1, relend, howto, 0, contents); 1453 1454 if (info->relocatable) 1455 continue; 1456 1457 switch (r_type) 1458 { 1459 case R_VAX_GOT32: 1460 /* Relocation is to the address of the entry for this symbol 1461 in the global offset table. */ 1462 1463 /* Resolve a GOTxx reloc against a local symbol directly, 1464 without using the global offset table. */ 1465 if (h == NULL 1466 || h->got.offset == (bfd_vma) -1) 1467 break; 1468 1469 { 1470 bfd_vma off; 1471 1472 if (sgot == NULL) 1473 { 1474 sgot = bfd_get_linker_section (dynobj, ".got"); 1475 BFD_ASSERT (sgot != NULL); 1476 } 1477 1478 off = h->got.offset; 1479 BFD_ASSERT (off < sgot->size); 1480 1481 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off); 1482 1483 relocation = sgot->output_offset + off; 1484 /* The GOT relocation uses the addend. */ 1485 rel->r_addend = 0; 1486 1487 /* Change the reference to be indirect. */ 1488 contents[rel->r_offset - 1] |= 0x10; 1489 relocation += sgot->output_section->vma; 1490 } 1491 break; 1492 1493 case R_VAX_PC32: 1494 /* If we are creating an executable and the function this 1495 reloc refers to is in a shared lib, then we made a PLT 1496 entry for this symbol and need to handle the reloc like 1497 a PLT reloc. */ 1498 if (info->shared) 1499 goto r_vax_pc32_shared; 1500 /* Fall through. */ 1501 case R_VAX_PLT32: 1502 /* Relocation is to the entry for this symbol in the 1503 procedure linkage table. */ 1504 1505 /* Resolve a PLTxx reloc against a local symbol directly, 1506 without using the procedure linkage table. */ 1507 if (h == NULL 1508 || h->plt.offset == (bfd_vma) -1) 1509 break; 1510 1511 if (splt == NULL) 1512 { 1513 splt = bfd_get_linker_section (dynobj, ".plt"); 1514 BFD_ASSERT (splt != NULL); 1515 } 1516 1517 if (sgotplt == NULL) 1518 { 1519 sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); 1520 BFD_ASSERT (sgotplt != NULL); 1521 } 1522 1523 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; 1524 1525 /* Get the offset into the .got table of the entry that 1526 corresponds to this function. Each .got entry is 4 bytes. 1527 The first two are reserved. */ 1528 got_offset = (plt_index + 3) * 4; 1529 1530 /* We want the relocation to point into the .got.plt instead 1531 of the plt itself. */ 1532 relocation = (sgotplt->output_section->vma 1533 + sgotplt->output_offset 1534 + got_offset); 1535 contents[rel->r_offset-1] |= 0x10; /* make indirect */ 1536 if (rel->r_addend == 2) 1537 { 1538 h->plt.offset |= 1; 1539 } 1540 else if (rel->r_addend != 0) 1541 (*_bfd_error_handler) 1542 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"), 1543 bfd_get_filename (input_bfd), rel->r_addend, 1544 h->root.root.string, 1545 bfd_get_section_name (input_bfd, input_section)); 1546 rel->r_addend = 0; 1547 1548 break; 1549 1550 case R_VAX_PC8: 1551 case R_VAX_PC16: 1552 r_vax_pc32_shared: 1553 if (h == NULL 1554 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 1555 || h->forced_local) 1556 break; 1557 /* Fall through. */ 1558 case R_VAX_8: 1559 case R_VAX_16: 1560 case R_VAX_32: 1561 if (info->shared 1562 && r_symndx != STN_UNDEF 1563 && (input_section->flags & SEC_ALLOC) != 0 1564 && ((r_type != R_VAX_PC8 1565 && r_type != R_VAX_PC16 1566 && r_type != R_VAX_PC32) 1567 || ((input_section->flags & SEC_CODE) 1568 && (!info->symbolic 1569 || (!h->def_regular && h->type != STT_SECTION))))) 1570 { 1571 Elf_Internal_Rela outrel; 1572 bfd_byte *loc; 1573 bfd_boolean skip, relocate; 1574 1575 /* When generating a shared object, these relocations 1576 are copied into the output file to be resolved at run 1577 time. */ 1578 if (sreloc == NULL) 1579 { 1580 sreloc = _bfd_elf_get_dynamic_reloc_section 1581 (input_bfd, input_section, /*rela?*/ TRUE); 1582 if (sreloc == NULL) 1583 return FALSE; 1584 } 1585 1586 skip = FALSE; 1587 relocate = FALSE; 1588 1589 outrel.r_offset = 1590 _bfd_elf_section_offset (output_bfd, info, input_section, 1591 rel->r_offset); 1592 if (outrel.r_offset == (bfd_vma) -1) 1593 skip = TRUE; 1594 if (outrel.r_offset == (bfd_vma) -2) 1595 skip = TRUE, relocate = TRUE; 1596 outrel.r_offset += (input_section->output_section->vma 1597 + input_section->output_offset); 1598 1599 if (skip) 1600 memset (&outrel, 0, sizeof outrel); 1601 /* h->dynindx may be -1 if the symbol was marked to 1602 become local. */ 1603 else if (h != NULL 1604 && ((! info->symbolic && h->dynindx != -1) 1605 || !h->def_regular)) 1606 { 1607 BFD_ASSERT (h->dynindx != -1); 1608 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 1609 outrel.r_addend = relocation + rel->r_addend; 1610 } 1611 else 1612 { 1613 if (r_type == R_VAX_32) 1614 { 1615 relocate = TRUE; 1616 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE); 1617 BFD_ASSERT (bfd_get_signed_32 (input_bfd, 1618 &contents[rel->r_offset]) == 0); 1619 outrel.r_addend = relocation + rel->r_addend; 1620 } 1621 else 1622 { 1623 long indx; 1624 1625 if (bfd_is_abs_section (sec)) 1626 indx = 0; 1627 else if (sec == NULL || sec->owner == NULL) 1628 { 1629 bfd_set_error (bfd_error_bad_value); 1630 return FALSE; 1631 } 1632 else 1633 { 1634 asection *osec; 1635 1636 /* We are turning this relocation into one 1637 against a section symbol. It would be 1638 proper to subtract the symbol's value, 1639 osec->vma, from the emitted reloc addend, 1640 but ld.so expects buggy relocs. */ 1641 osec = sec->output_section; 1642 indx = elf_section_data (osec)->dynindx; 1643 if (indx == 0) 1644 { 1645 struct elf_link_hash_table *htab; 1646 htab = elf_hash_table (info); 1647 osec = htab->text_index_section; 1648 indx = elf_section_data (osec)->dynindx; 1649 } 1650 BFD_ASSERT (indx != 0); 1651 } 1652 1653 outrel.r_info = ELF32_R_INFO (indx, r_type); 1654 outrel.r_addend = relocation + rel->r_addend; 1655 } 1656 } 1657 1658 if ((input_section->flags & SEC_CODE) != 0 1659 || (ELF32_R_TYPE (outrel.r_info) != R_VAX_32 1660 && ELF32_R_TYPE (outrel.r_info) != R_VAX_RELATIVE 1661 && ELF32_R_TYPE (outrel.r_info) != R_VAX_COPY 1662 && ELF32_R_TYPE (outrel.r_info) != R_VAX_JMP_SLOT 1663 && ELF32_R_TYPE (outrel.r_info) != R_VAX_GLOB_DAT)) 1664 { 1665 if (h != NULL) 1666 (*_bfd_error_handler) 1667 (_("%s: warning: %s relocation against symbol `%s' from %s section"), 1668 bfd_get_filename (input_bfd), howto->name, 1669 h->root.root.string, 1670 bfd_get_section_name (input_bfd, input_section)); 1671 else 1672 (*_bfd_error_handler) 1673 (_("%s: warning: %s relocation to 0x%x from %s section"), 1674 bfd_get_filename (input_bfd), howto->name, 1675 outrel.r_addend, 1676 bfd_get_section_name (input_bfd, input_section)); 1677 } 1678 loc = sreloc->contents; 1679 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 1680 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1681 1682 /* This reloc will be computed at runtime, so there's no 1683 need to do anything now, except for R_VAX_32 1684 relocations that have been turned into 1685 R_VAX_RELATIVE. */ 1686 if (!relocate) 1687 continue; 1688 } 1689 1690 break; 1691 1692 case R_VAX_GNU_VTINHERIT: 1693 case R_VAX_GNU_VTENTRY: 1694 /* These are no-ops in the end. */ 1695 continue; 1696 1697 default: 1698 break; 1699 } 1700 1701 /* VAX PCREL relocations are from the end of relocation, not the start. 1702 So subtract the difference from the relocation amount since we can't 1703 add it to the offset. */ 1704 if (howto->pc_relative && howto->pcrel_offset) 1705 relocation -= bfd_get_reloc_size(howto); 1706 1707 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 1708 contents, rel->r_offset, 1709 relocation, rel->r_addend); 1710 1711 if (r != bfd_reloc_ok) 1712 { 1713 switch (r) 1714 { 1715 default: 1716 case bfd_reloc_outofrange: 1717 abort (); 1718 case bfd_reloc_overflow: 1719 { 1720 const char *name; 1721 1722 if (h != NULL) 1723 name = NULL; 1724 else 1725 { 1726 name = bfd_elf_string_from_elf_section (input_bfd, 1727 symtab_hdr->sh_link, 1728 sym->st_name); 1729 if (name == NULL) 1730 return FALSE; 1731 if (*name == '\0') 1732 name = bfd_section_name (input_bfd, sec); 1733 } 1734 if (!(info->callbacks->reloc_overflow 1735 (info, (h ? &h->root : NULL), name, howto->name, 1736 (bfd_vma) 0, input_bfd, input_section, 1737 rel->r_offset))) 1738 return FALSE; 1739 } 1740 break; 1741 } 1742 } 1743 } 1744 1745 return TRUE; 1746 } 1747 1748 /* Finish up dynamic symbol handling. We set the contents of various 1749 dynamic sections here. */ 1750 1751 static bfd_boolean 1752 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info, 1753 struct elf_link_hash_entry *h, 1754 Elf_Internal_Sym *sym) 1755 { 1756 bfd *dynobj; 1757 1758 dynobj = elf_hash_table (info)->dynobj; 1759 1760 if (h->plt.offset != (bfd_vma) -1) 1761 { 1762 asection *splt; 1763 asection *sgot; 1764 asection *srela; 1765 bfd_vma plt_index; 1766 bfd_vma got_offset; 1767 bfd_vma addend; 1768 Elf_Internal_Rela rela; 1769 bfd_byte *loc; 1770 1771 /* This symbol has an entry in the procedure linkage table. Set 1772 it up. */ 1773 BFD_ASSERT (h->dynindx != -1); 1774 1775 splt = bfd_get_linker_section (dynobj, ".plt"); 1776 sgot = bfd_get_linker_section (dynobj, ".got.plt"); 1777 srela = bfd_get_linker_section (dynobj, ".rela.plt"); 1778 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); 1779 1780 addend = 2 * (h->plt.offset & 1); 1781 h->plt.offset &= ~1; 1782 1783 /* Get the index in the procedure linkage table which 1784 corresponds to this symbol. This is the index of this symbol 1785 in all the symbols for which we are making plt entries. The 1786 first entry in the procedure linkage table is reserved. */ 1787 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; 1788 1789 /* Get the offset into the .got table of the entry that 1790 corresponds to this function. Each .got entry is 4 bytes. 1791 The first two are reserved. */ 1792 got_offset = (plt_index + 3) * 4; 1793 1794 /* Fill in the entry in the procedure linkage table. */ 1795 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry, 1796 PLT_ENTRY_SIZE); 1797 1798 /* The offset is relative to the first extension word. */ 1799 bfd_put_32 (output_bfd, 1800 -(h->plt.offset + 8), 1801 splt->contents + h->plt.offset + 4); 1802 1803 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), 1804 splt->contents + h->plt.offset + 8); 1805 1806 /* Fill in the entry in the global offset table. */ 1807 bfd_put_32 (output_bfd, 1808 (splt->output_section->vma 1809 + splt->output_offset 1810 + h->plt.offset) + addend, 1811 sgot->contents + got_offset); 1812 1813 /* Fill in the entry in the .rela.plt section. */ 1814 rela.r_offset = (sgot->output_section->vma 1815 + sgot->output_offset 1816 + got_offset); 1817 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT); 1818 rela.r_addend = addend; 1819 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela); 1820 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1821 1822 if (!h->def_regular) 1823 { 1824 /* Mark the symbol as undefined, rather than as defined in 1825 the .plt section. Leave the value alone. */ 1826 sym->st_shndx = SHN_UNDEF; 1827 } 1828 } 1829 1830 if (h->got.offset != (bfd_vma) -1) 1831 { 1832 asection *sgot; 1833 asection *srela; 1834 Elf_Internal_Rela rela; 1835 bfd_byte *loc; 1836 1837 /* This symbol has an entry in the global offset table. Set it 1838 up. */ 1839 sgot = bfd_get_linker_section (dynobj, ".got"); 1840 srela = bfd_get_linker_section (dynobj, ".rela.got"); 1841 BFD_ASSERT (sgot != NULL && srela != NULL); 1842 1843 rela.r_offset = (sgot->output_section->vma 1844 + sgot->output_offset 1845 + h->got.offset); 1846 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT); 1847 rela.r_addend = bfd_get_signed_32 (output_bfd, 1848 sgot->contents + h->got.offset); 1849 1850 loc = srela->contents; 1851 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); 1852 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1853 } 1854 1855 if (h->needs_copy) 1856 { 1857 asection *s; 1858 Elf_Internal_Rela rela; 1859 bfd_byte *loc; 1860 1861 /* This symbol needs a copy reloc. Set it up. */ 1862 BFD_ASSERT (h->dynindx != -1 1863 && (h->root.type == bfd_link_hash_defined 1864 || h->root.type == bfd_link_hash_defweak)); 1865 1866 s = bfd_get_linker_section (dynobj, ".rela.bss"); 1867 BFD_ASSERT (s != NULL); 1868 1869 rela.r_offset = (h->root.u.def.value 1870 + h->root.u.def.section->output_section->vma 1871 + h->root.u.def.section->output_offset); 1872 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY); 1873 rela.r_addend = 0; 1874 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); 1875 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1876 } 1877 1878 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ 1879 if (h == elf_hash_table (info)->hdynamic 1880 || h == elf_hash_table (info)->hgot) 1881 sym->st_shndx = SHN_ABS; 1882 1883 return TRUE; 1884 } 1885 1886 /* Finish up the dynamic sections. */ 1887 1888 static bfd_boolean 1889 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) 1890 { 1891 bfd *dynobj; 1892 asection *sgot; 1893 asection *sdyn; 1894 1895 dynobj = elf_hash_table (info)->dynobj; 1896 1897 sgot = bfd_get_linker_section (dynobj, ".got.plt"); 1898 BFD_ASSERT (sgot != NULL); 1899 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 1900 1901 if (elf_hash_table (info)->dynamic_sections_created) 1902 { 1903 asection *splt; 1904 Elf32_External_Dyn *dyncon, *dynconend; 1905 1906 splt = bfd_get_linker_section (dynobj, ".plt"); 1907 BFD_ASSERT (splt != NULL && sdyn != NULL); 1908 1909 dyncon = (Elf32_External_Dyn *) sdyn->contents; 1910 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 1911 for (; dyncon < dynconend; dyncon++) 1912 { 1913 Elf_Internal_Dyn dyn; 1914 const char *name; 1915 asection *s; 1916 1917 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 1918 1919 switch (dyn.d_tag) 1920 { 1921 default: 1922 break; 1923 1924 case DT_PLTGOT: 1925 name = ".got"; 1926 goto get_vma; 1927 case DT_JMPREL: 1928 name = ".rela.plt"; 1929 get_vma: 1930 s = bfd_get_section_by_name (output_bfd, name); 1931 BFD_ASSERT (s != NULL); 1932 dyn.d_un.d_ptr = s->vma; 1933 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 1934 break; 1935 1936 case DT_PLTRELSZ: 1937 s = bfd_get_section_by_name (output_bfd, ".rela.plt"); 1938 BFD_ASSERT (s != NULL); 1939 dyn.d_un.d_val = s->size; 1940 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 1941 break; 1942 1943 case DT_RELASZ: 1944 /* The procedure linkage table relocs (DT_JMPREL) should 1945 not be included in the overall relocs (DT_RELA). 1946 Therefore, we override the DT_RELASZ entry here to 1947 make it not include the JMPREL relocs. Since the 1948 linker script arranges for .rela.plt to follow all 1949 other relocation sections, we don't have to worry 1950 about changing the DT_RELA entry. */ 1951 s = bfd_get_section_by_name (output_bfd, ".rela.plt"); 1952 if (s != NULL) 1953 dyn.d_un.d_val -= s->size; 1954 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 1955 break; 1956 } 1957 } 1958 1959 /* Fill in the first entry in the procedure linkage table. */ 1960 if (splt->size > 0) 1961 { 1962 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE); 1963 bfd_put_32 (output_bfd, 1964 (sgot->output_section->vma 1965 + sgot->output_offset + 4 1966 - (splt->output_section->vma + 6)), 1967 splt->contents + 2); 1968 bfd_put_32 (output_bfd, 1969 (sgot->output_section->vma 1970 + sgot->output_offset + 8 1971 - (splt->output_section->vma + 12)), 1972 splt->contents + 8); 1973 elf_section_data (splt->output_section)->this_hdr.sh_entsize 1974 = PLT_ENTRY_SIZE; 1975 } 1976 } 1977 1978 /* Fill in the first three entries in the global offset table. */ 1979 if (sgot->size > 0) 1980 { 1981 if (sdyn == NULL) 1982 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 1983 else 1984 bfd_put_32 (output_bfd, 1985 sdyn->output_section->vma + sdyn->output_offset, 1986 sgot->contents); 1987 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); 1988 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); 1989 } 1990 1991 if (elf_section_data (sgot->output_section) != NULL) 1992 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 1993 1994 return TRUE; 1995 } 1996 1997 static enum elf_reloc_type_class 1998 elf_vax_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 1999 const asection *rel_sec ATTRIBUTE_UNUSED, 2000 const Elf_Internal_Rela *rela) 2001 { 2002 switch ((int) ELF32_R_TYPE (rela->r_info)) 2003 { 2004 case R_VAX_RELATIVE: 2005 return reloc_class_relative; 2006 case R_VAX_JMP_SLOT: 2007 return reloc_class_plt; 2008 case R_VAX_COPY: 2009 return reloc_class_copy; 2010 default: 2011 return reloc_class_normal; 2012 } 2013 } 2014 2015 static bfd_vma 2016 elf_vax_plt_sym_val (bfd_vma i, const asection *plt, 2017 const arelent *rel ATTRIBUTE_UNUSED) 2018 { 2019 return plt->vma + (i + 1) * PLT_ENTRY_SIZE; 2020 } 2021 2022 #define TARGET_LITTLE_SYM vax_elf32_vec 2023 #define TARGET_LITTLE_NAME "elf32-vax" 2024 #define ELF_MACHINE_CODE EM_VAX 2025 #define ELF_MAXPAGESIZE 0x1000 2026 2027 #define elf_backend_create_dynamic_sections \ 2028 _bfd_elf_create_dynamic_sections 2029 #define bfd_elf32_bfd_link_hash_table_create \ 2030 elf_vax_link_hash_table_create 2031 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link 2032 2033 #define elf_backend_check_relocs elf_vax_check_relocs 2034 #define elf_backend_adjust_dynamic_symbol \ 2035 elf_vax_adjust_dynamic_symbol 2036 #define elf_backend_always_size_sections \ 2037 elf_vax_always_size_sections 2038 #define elf_backend_size_dynamic_sections \ 2039 elf_vax_size_dynamic_sections 2040 #define elf_backend_init_index_section _bfd_elf_init_1_index_section 2041 #define elf_backend_relocate_section elf_vax_relocate_section 2042 #define elf_backend_finish_dynamic_symbol \ 2043 elf_vax_finish_dynamic_symbol 2044 #define elf_backend_finish_dynamic_sections \ 2045 elf_vax_finish_dynamic_sections 2046 #define elf_backend_reloc_type_class elf_vax_reloc_type_class 2047 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook 2048 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook 2049 #define elf_backend_plt_sym_val elf_vax_plt_sym_val 2050 #define bfd_elf32_bfd_merge_private_bfd_data \ 2051 elf32_vax_merge_private_bfd_data 2052 #define bfd_elf32_bfd_set_private_flags \ 2053 elf32_vax_set_private_flags 2054 #define bfd_elf32_bfd_print_private_bfd_data \ 2055 elf32_vax_print_private_bfd_data 2056 2057 #define elf_backend_can_gc_sections 1 2058 #define elf_backend_want_got_plt 1 2059 #define elf_backend_plt_readonly 1 2060 #define elf_backend_want_plt_sym 0 2061 #define elf_backend_got_header_size 16 2062 #define elf_backend_rela_normal 1 2063 2064 #include "elf32-target.h" 2065
