1 /* VAX series support for 32-bit ELF 2 Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 3 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 4 Free Software Foundation, Inc. 5 Contributed by Matt Thomas <matt@3am-software.com>. 6 7 This file is part of BFD, the Binary File Descriptor library. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 22 MA 02110-1301, USA. */ 23 24 #include "sysdep.h" 25 #include "bfd.h" 26 #include "bfdlink.h" 27 #include "libbfd.h" 28 #include "elf-bfd.h" 29 #include "elf/vax.h" 30 31 static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type); 32 static void rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *); 33 static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *, 34 struct bfd_hash_table *, 35 const char *); 36 static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *); 37 static bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *, 38 asection *, const Elf_Internal_Rela *); 39 static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *, 40 struct elf_link_hash_entry *); 41 static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *); 42 static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *, 43 bfd *, asection *, bfd_byte *, 44 Elf_Internal_Rela *, 45 Elf_Internal_Sym *, asection **); 46 static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *, 47 struct elf_link_hash_entry *, 48 Elf_Internal_Sym *); 49 static bfd_boolean elf_vax_finish_dynamic_sections (bfd *, 50 struct bfd_link_info *); 51 static bfd_vma elf_vax_plt_sym_val (bfd_vma, const asection *, 52 const arelent *); 53 54 static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword); 55 static bfd_boolean elf32_vax_merge_private_bfd_data (bfd *, bfd *); 56 static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, void *); 57 58 static reloc_howto_type howto_table[] = { 59 HOWTO (R_VAX_NONE, /* type */ 60 0, /* rightshift */ 61 0, /* size (0 = byte, 1 = short, 2 = long) */ 62 0, /* bitsize */ 63 FALSE, /* pc_relative */ 64 0, /* bitpos */ 65 complain_overflow_dont, /* complain_on_overflow */ 66 bfd_elf_generic_reloc, /* special_function */ 67 "R_VAX_NONE", /* name */ 68 FALSE, /* partial_inplace */ 69 0, /* src_mask */ 70 0x00000000, /* dst_mask */ 71 FALSE), /* pcrel_offset */ 72 73 HOWTO (R_VAX_32, /* type */ 74 0, /* rightshift */ 75 2, /* size (0 = byte, 1 = short, 2 = long) */ 76 32, /* bitsize */ 77 FALSE, /* pc_relative */ 78 0, /* bitpos */ 79 complain_overflow_bitfield, /* complain_on_overflow */ 80 bfd_elf_generic_reloc, /* special_function */ 81 "R_VAX_32", /* name */ 82 FALSE, /* partial_inplace */ 83 0, /* src_mask */ 84 0xffffffff, /* dst_mask */ 85 FALSE), /* pcrel_offset */ 86 87 HOWTO (R_VAX_16, /* type */ 88 0, /* rightshift */ 89 1, /* size (0 = byte, 1 = short, 2 = long) */ 90 16, /* bitsize */ 91 FALSE, /* pc_relative */ 92 0, /* bitpos */ 93 complain_overflow_bitfield, /* complain_on_overflow */ 94 bfd_elf_generic_reloc, /* special_function */ 95 "R_VAX_16", /* name */ 96 FALSE, /* partial_inplace */ 97 0, /* src_mask */ 98 0x0000ffff, /* dst_mask */ 99 FALSE), /* pcrel_offset */ 100 101 HOWTO (R_VAX_8, /* type */ 102 0, /* rightshift */ 103 0, /* size (0 = byte, 1 = short, 2 = long) */ 104 8, /* bitsize */ 105 FALSE, /* pc_relative */ 106 0, /* bitpos */ 107 complain_overflow_bitfield, /* complain_on_overflow */ 108 bfd_elf_generic_reloc, /* special_function */ 109 "R_VAX_8", /* name */ 110 FALSE, /* partial_inplace */ 111 0, /* src_mask */ 112 0x000000ff, /* dst_mask */ 113 FALSE), /* pcrel_offset */ 114 115 HOWTO (R_VAX_PC32, /* type */ 116 0, /* rightshift */ 117 2, /* size (0 = byte, 1 = short, 2 = long) */ 118 32, /* bitsize */ 119 TRUE, /* pc_relative */ 120 0, /* bitpos */ 121 complain_overflow_bitfield, /* complain_on_overflow */ 122 bfd_elf_generic_reloc, /* special_function */ 123 "R_VAX_PC32", /* name */ 124 FALSE, /* partial_inplace */ 125 0, /* src_mask */ 126 0xffffffff, /* dst_mask */ 127 TRUE), /* pcrel_offset */ 128 129 HOWTO (R_VAX_PC16, /* type */ 130 0, /* rightshift */ 131 1, /* size (0 = byte, 1 = short, 2 = long) */ 132 16, /* bitsize */ 133 TRUE, /* pc_relative */ 134 0, /* bitpos */ 135 complain_overflow_signed, /* complain_on_overflow */ 136 bfd_elf_generic_reloc, /* special_function */ 137 "R_VAX_PC16", /* name */ 138 FALSE, /* partial_inplace */ 139 0, /* src_mask */ 140 0x0000ffff, /* dst_mask */ 141 TRUE), /* pcrel_offset */ 142 143 HOWTO (R_VAX_PC8, /* type */ 144 0, /* rightshift */ 145 0, /* size (0 = byte, 1 = short, 2 = long) */ 146 8, /* bitsize */ 147 TRUE, /* pc_relative */ 148 0, /* bitpos */ 149 complain_overflow_signed, /* complain_on_overflow */ 150 bfd_elf_generic_reloc, /* special_function */ 151 "R_VAX_PC8", /* name */ 152 FALSE, /* partial_inplace */ 153 0, /* src_mask */ 154 0x000000ff, /* dst_mask */ 155 TRUE), /* pcrel_offset */ 156 157 HOWTO (R_VAX_GOT32, /* type */ 158 0, /* rightshift */ 159 2, /* size (0 = byte, 1 = short, 2 = long) */ 160 32, /* bitsize */ 161 TRUE, /* pc_relative */ 162 0, /* bitpos */ 163 complain_overflow_bitfield, /* complain_on_overflow */ 164 bfd_elf_generic_reloc, /* special_function */ 165 "R_VAX_GOT32", /* name */ 166 FALSE, /* partial_inplace */ 167 0, /* src_mask */ 168 0xffffffff, /* dst_mask */ 169 TRUE), /* pcrel_offset */ 170 171 EMPTY_HOWTO (-1), 172 EMPTY_HOWTO (-1), 173 EMPTY_HOWTO (-1), 174 EMPTY_HOWTO (-1), 175 EMPTY_HOWTO (-1), 176 177 HOWTO (R_VAX_PLT32, /* type */ 178 0, /* rightshift */ 179 2, /* size (0 = byte, 1 = short, 2 = long) */ 180 32, /* bitsize */ 181 TRUE, /* pc_relative */ 182 0, /* bitpos */ 183 complain_overflow_bitfield, /* complain_on_overflow */ 184 bfd_elf_generic_reloc, /* special_function */ 185 "R_VAX_PLT32", /* name */ 186 FALSE, /* partial_inplace */ 187 0, /* src_mask */ 188 0xffffffff, /* dst_mask */ 189 TRUE), /* pcrel_offset */ 190 191 EMPTY_HOWTO (-1), 192 EMPTY_HOWTO (-1), 193 EMPTY_HOWTO (-1), 194 EMPTY_HOWTO (-1), 195 EMPTY_HOWTO (-1), 196 197 HOWTO (R_VAX_COPY, /* type */ 198 0, /* rightshift */ 199 0, /* size (0 = byte, 1 = short, 2 = long) */ 200 0, /* bitsize */ 201 FALSE, /* pc_relative */ 202 0, /* bitpos */ 203 complain_overflow_dont, /* complain_on_overflow */ 204 bfd_elf_generic_reloc, /* special_function */ 205 "R_VAX_COPY", /* name */ 206 FALSE, /* partial_inplace */ 207 0, /* src_mask */ 208 0xffffffff, /* dst_mask */ 209 FALSE), /* pcrel_offset */ 210 211 HOWTO (R_VAX_GLOB_DAT, /* type */ 212 0, /* rightshift */ 213 2, /* size (0 = byte, 1 = short, 2 = long) */ 214 32, /* bitsize */ 215 FALSE, /* pc_relative */ 216 0, /* bitpos */ 217 complain_overflow_dont, /* complain_on_overflow */ 218 bfd_elf_generic_reloc, /* special_function */ 219 "R_VAX_GLOB_DAT", /* name */ 220 FALSE, /* partial_inplace */ 221 0, /* src_mask */ 222 0xffffffff, /* dst_mask */ 223 FALSE), /* pcrel_offset */ 224 225 HOWTO (R_VAX_JMP_SLOT, /* type */ 226 0, /* rightshift */ 227 2, /* size (0 = byte, 1 = short, 2 = long) */ 228 32, /* bitsize */ 229 FALSE, /* pc_relative */ 230 0, /* bitpos */ 231 complain_overflow_dont, /* complain_on_overflow */ 232 bfd_elf_generic_reloc, /* special_function */ 233 "R_VAX_JMP_SLOT", /* name */ 234 FALSE, /* partial_inplace */ 235 0, /* src_mask */ 236 0xffffffff, /* dst_mask */ 237 FALSE), /* pcrel_offset */ 238 239 HOWTO (R_VAX_RELATIVE, /* type */ 240 0, /* rightshift */ 241 2, /* size (0 = byte, 1 = short, 2 = long) */ 242 32, /* bitsize */ 243 FALSE, /* pc_relative */ 244 0, /* bitpos */ 245 complain_overflow_dont, /* complain_on_overflow */ 246 bfd_elf_generic_reloc, /* special_function */ 247 "R_VAX_RELATIVE", /* name */ 248 FALSE, /* partial_inplace */ 249 0, /* src_mask */ 250 0xffffffff, /* dst_mask */ 251 FALSE), /* pcrel_offset */ 252 253 /* GNU extension to record C++ vtable hierarchy */ 254 HOWTO (R_VAX_GNU_VTINHERIT, /* type */ 255 0, /* rightshift */ 256 2, /* size (0 = byte, 1 = short, 2 = long) */ 257 0, /* bitsize */ 258 FALSE, /* pc_relative */ 259 0, /* bitpos */ 260 complain_overflow_dont, /* complain_on_overflow */ 261 NULL, /* special_function */ 262 "R_VAX_GNU_VTINHERIT", /* name */ 263 FALSE, /* partial_inplace */ 264 0, /* src_mask */ 265 0, /* dst_mask */ 266 FALSE), /* pcrel_offset */ 267 268 /* GNU extension to record C++ vtable member usage */ 269 HOWTO (R_VAX_GNU_VTENTRY, /* type */ 270 0, /* rightshift */ 271 2, /* size (0 = byte, 1 = short, 2 = long) */ 272 0, /* bitsize */ 273 FALSE, /* pc_relative */ 274 0, /* bitpos */ 275 complain_overflow_dont, /* complain_on_overflow */ 276 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 277 "R_VAX_GNU_VTENTRY", /* name */ 278 FALSE, /* partial_inplace */ 279 0, /* src_mask */ 280 0, /* dst_mask */ 281 FALSE), /* pcrel_offset */ 282 }; 283 284 static void 285 rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, 286 Elf_Internal_Rela *dst) 287 { 288 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max); 289 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)]; 290 } 291 292 #define elf_info_to_howto rtype_to_howto 293 294 static const struct 295 { 296 bfd_reloc_code_real_type bfd_val; 297 int elf_val; 298 } reloc_map[] = { 299 { BFD_RELOC_NONE, R_VAX_NONE }, 300 { BFD_RELOC_32, R_VAX_32 }, 301 { BFD_RELOC_16, R_VAX_16 }, 302 { BFD_RELOC_8, R_VAX_8 }, 303 { BFD_RELOC_32_PCREL, R_VAX_PC32 }, 304 { BFD_RELOC_16_PCREL, R_VAX_PC16 }, 305 { BFD_RELOC_8_PCREL, R_VAX_PC8 }, 306 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 }, 307 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 }, 308 { BFD_RELOC_NONE, R_VAX_COPY }, 309 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT }, 310 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT }, 311 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE }, 312 { BFD_RELOC_CTOR, R_VAX_32 }, 313 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT }, 314 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY }, 315 }; 316 317 static reloc_howto_type * 318 reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code) 319 { 320 unsigned int i; 321 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++) 322 { 323 if (reloc_map[i].bfd_val == code) 324 return &howto_table[reloc_map[i].elf_val]; 325 } 326 return 0; 327 } 328 329 static reloc_howto_type * 330 reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 331 const char *r_name) 332 { 333 unsigned int i; 334 335 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++) 336 if (howto_table[i].name != NULL 337 && strcasecmp (howto_table[i].name, r_name) == 0) 338 return &howto_table[i]; 339 340 return NULL; 341 } 342 343 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup 344 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup 345 #define ELF_ARCH bfd_arch_vax 346 /* end code generated by elf.el */ 347 348 /* Functions for the VAX ELF linker. */ 349 350 /* The name of the dynamic interpreter. This is put in the .interp 351 section. */ 352 353 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so" 354 355 /* The size in bytes of an entry in the procedure linkage table. */ 356 357 #define PLT_ENTRY_SIZE 12 358 359 /* The first entry in a procedure linkage table looks like this. See 360 the SVR4 ABI VAX supplement to see how this works. */ 361 362 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] = 363 { 364 0xdd, 0xef, /* pushl l^ */ 365 0, 0, 0, 0, /* offset to .plt.got + 4 */ 366 0x17, 0xff, /* jmp @L^(pc) */ 367 0, 0, 0, 0, /* offset to .plt.got + 8 */ 368 }; 369 370 /* Subsequent entries in a procedure linkage table look like this. */ 371 372 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] = 373 { 374 0xfc, 0x0f, /* .word ^M<r11:r2> */ 375 0x16, 0xef, /* jsb L^(pc) */ 376 0, 0, 0, 0, /* replaced with offset to start of .plt */ 377 0, 0, 0, 0, /* index into .rela.plt */ 378 }; 379 380 /* The VAX linker needs to keep track of the number of relocs that it 381 decides to copy in check_relocs for each symbol. This is so that it 382 can discard PC relative relocs if it doesn't need them when linking 383 with -Bsymbolic. We store the information in a field extending the 384 regular ELF linker hash table. */ 385 386 /* This structure keeps track of the number of PC relative relocs we have 387 copied for a given symbol. */ 388 389 struct elf_vax_pcrel_relocs_copied 390 { 391 /* Next section. */ 392 struct elf_vax_pcrel_relocs_copied *next; 393 /* A section in dynobj. */ 394 asection *section; 395 /* Number of relocs copied in this section. */ 396 bfd_size_type count; 397 }; 398 399 /* VAX ELF linker hash entry. */ 400 401 struct elf_vax_link_hash_entry 402 { 403 struct elf_link_hash_entry root; 404 405 /* Number of PC relative relocs copied for this symbol. */ 406 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied; 407 408 bfd_vma got_addend; 409 }; 410 411 /* Declare this now that the above structures are defined. */ 412 413 static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *, 414 void *); 415 416 /* Declare this now that the above structures are defined. */ 417 418 static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *, 419 void *); 420 421 /* Traverse an VAX ELF linker hash table. */ 422 423 #define elf_vax_link_hash_traverse(table, func, info) \ 424 (elf_link_hash_traverse \ 425 ((table), \ 426 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ 427 (info))) 428 429 /* Create an entry in an VAX ELF linker hash table. */ 430 431 static struct bfd_hash_entry * 432 elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry, 433 struct bfd_hash_table *table, 434 const char *string) 435 { 436 struct elf_vax_link_hash_entry *ret = 437 (struct elf_vax_link_hash_entry *) entry; 438 439 /* Allocate the structure if it has not already been allocated by a 440 subclass. */ 441 if (ret == NULL) 442 ret = ((struct elf_vax_link_hash_entry *) 443 bfd_hash_allocate (table, 444 sizeof (struct elf_vax_link_hash_entry))); 445 if (ret == NULL) 446 return (struct bfd_hash_entry *) ret; 447 448 /* Call the allocation method of the superclass. */ 449 ret = ((struct elf_vax_link_hash_entry *) 450 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, 451 table, string)); 452 if (ret != NULL) 453 { 454 ret->pcrel_relocs_copied = NULL; 455 } 456 457 return (struct bfd_hash_entry *) ret; 458 } 459 460 /* Create an VAX ELF linker hash table. */ 461 462 static struct bfd_link_hash_table * 463 elf_vax_link_hash_table_create (bfd *abfd) 464 { 465 struct elf_link_hash_table *ret; 466 bfd_size_type amt = sizeof (struct elf_link_hash_table); 467 468 ret = bfd_zmalloc (amt); 469 if (ret == NULL) 470 return NULL; 471 472 if (!_bfd_elf_link_hash_table_init (ret, abfd, 473 elf_vax_link_hash_newfunc, 474 sizeof (struct elf_vax_link_hash_entry), 475 GENERIC_ELF_DATA)) 476 { 477 free (ret); 478 return NULL; 479 } 480 481 return &ret->root; 482 } 483 484 /* Keep vax-specific flags in the ELF header */ 485 static bfd_boolean 486 elf32_vax_set_private_flags (bfd *abfd, flagword flags) 487 { 488 elf_elfheader (abfd)->e_flags = flags; 489 elf_flags_init (abfd) = TRUE; 490 return TRUE; 491 } 492 493 /* Merge backend specific data from an object file to the output 494 object file when linking. */ 495 static bfd_boolean 496 elf32_vax_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 497 { 498 flagword in_flags; 499 500 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour 501 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 502 return TRUE; 503 504 in_flags = elf_elfheader (ibfd)->e_flags; 505 506 if (!elf_flags_init (obfd)) 507 { 508 elf_flags_init (obfd) = TRUE; 509 elf_elfheader (obfd)->e_flags = in_flags; 510 } 511 512 return TRUE; 513 } 514 515 /* Display the flags field */ 516 static bfd_boolean 517 elf32_vax_print_private_bfd_data (bfd *abfd, void * ptr) 518 { 519 FILE *file = (FILE *) ptr; 520 521 BFD_ASSERT (abfd != NULL && ptr != NULL); 522 523 /* Print normal ELF private data. */ 524 _bfd_elf_print_private_bfd_data (abfd, ptr); 525 526 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */ 527 528 /* xgettext:c-format */ 529 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); 530 531 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC) 532 fprintf (file, _(" [nonpic]")); 533 534 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT) 535 fprintf (file, _(" [d-float]")); 536 537 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT) 538 fprintf (file, _(" [g-float]")); 539 540 fputc ('\n', file); 541 542 return TRUE; 543 } 544 /* Look through the relocs for a section during the first phase, and 545 allocate space in the global offset table or procedure linkage 546 table. */ 547 548 static bfd_boolean 549 elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec, 550 const Elf_Internal_Rela *relocs) 551 { 552 bfd *dynobj; 553 Elf_Internal_Shdr *symtab_hdr; 554 struct elf_link_hash_entry **sym_hashes; 555 const Elf_Internal_Rela *rel; 556 const Elf_Internal_Rela *rel_end; 557 asection *sgot; 558 asection *srelgot; 559 asection *sreloc; 560 561 if (info->relocatable) 562 return TRUE; 563 564 dynobj = elf_hash_table (info)->dynobj; 565 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 566 sym_hashes = elf_sym_hashes (abfd); 567 568 sgot = NULL; 569 srelgot = NULL; 570 sreloc = NULL; 571 572 rel_end = relocs + sec->reloc_count; 573 for (rel = relocs; rel < rel_end; rel++) 574 { 575 unsigned long r_symndx; 576 struct elf_link_hash_entry *h; 577 578 r_symndx = ELF32_R_SYM (rel->r_info); 579 580 if (r_symndx < symtab_hdr->sh_info) 581 h = NULL; 582 else 583 { 584 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 585 while (h->root.type == bfd_link_hash_indirect 586 || h->root.type == bfd_link_hash_warning) 587 h = (struct elf_link_hash_entry *) h->root.u.i.link; 588 } 589 590 switch (ELF32_R_TYPE (rel->r_info)) 591 { 592 case R_VAX_GOT32: 593 BFD_ASSERT (h != NULL); 594 if (h->forced_local 595 || h == elf_hash_table (info)->hgot 596 || h == elf_hash_table (info)->hplt) 597 break; 598 599 /* If this is a local symbol, we resolve it directly without 600 creating a global offset table entry. */ 601 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 602 break; 603 604 /* This symbol requires a global offset table entry. */ 605 606 if (dynobj == NULL) 607 { 608 /* Create the .got section. */ 609 elf_hash_table (info)->dynobj = dynobj = abfd; 610 if (!_bfd_elf_create_got_section (dynobj, info)) 611 return FALSE; 612 } 613 614 if (sgot == NULL) 615 { 616 sgot = bfd_get_linker_section (dynobj, ".got"); 617 BFD_ASSERT (sgot != NULL); 618 } 619 620 if (srelgot == NULL 621 && (h != NULL || info->shared)) 622 { 623 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 624 if (srelgot == NULL) 625 { 626 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 627 | SEC_IN_MEMORY | SEC_LINKER_CREATED 628 | SEC_READONLY); 629 630 srelgot = bfd_make_section_anyway_with_flags (dynobj, 631 ".rela.got", 632 flags); 633 if (srelgot == NULL 634 || !bfd_set_section_alignment (dynobj, srelgot, 2)) 635 return FALSE; 636 } 637 } 638 639 if (h != NULL) 640 { 641 struct elf_vax_link_hash_entry *eh; 642 643 eh = (struct elf_vax_link_hash_entry *) h; 644 if (h->got.refcount == -1) 645 { 646 h->got.refcount = 1; 647 eh->got_addend = rel->r_addend; 648 } 649 else 650 { 651 h->got.refcount++; 652 if (eh->got_addend != (bfd_vma) rel->r_addend) 653 (*_bfd_error_handler) 654 (_("%s: warning: GOT addend of %ld to `%s' does" 655 " not match previous GOT addend of %ld"), 656 bfd_get_filename (abfd), rel->r_addend, 657 h->root.root.string, 658 eh->got_addend); 659 660 } 661 } 662 break; 663 664 case R_VAX_PLT32: 665 /* This symbol requires a procedure linkage table entry. We 666 actually build the entry in adjust_dynamic_symbol, 667 because this might be a case of linking PIC code which is 668 never referenced by a dynamic object, in which case we 669 don't need to generate a procedure linkage table entry 670 after all. */ 671 672 /* If this is a local symbol, we resolve it directly without 673 creating a procedure linkage table entry. */ 674 BFD_ASSERT (h != NULL); 675 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT || h->forced_local) 676 break; 677 678 h->needs_plt = 1; 679 if (h->plt.refcount == -1) 680 h->plt.refcount = 1; 681 else 682 h->plt.refcount++; 683 break; 684 685 case R_VAX_PC8: 686 case R_VAX_PC16: 687 case R_VAX_PC32: 688 /* If we are creating a shared library and this is not a local 689 symbol, we need to copy the reloc into the shared library. 690 However when linking with -Bsymbolic and this is a global 691 symbol which is defined in an object we are including in the 692 link (i.e., DEF_REGULAR is set), then we can resolve the 693 reloc directly. At this point we have not seen all the input 694 files, so it is possible that DEF_REGULAR is not set now but 695 will be set later (it is never cleared). We account for that 696 possibility below by storing information in the 697 pcrel_relocs_copied field of the hash table entry. */ 698 if (!(info->shared 699 && (sec->flags & SEC_ALLOC) != 0 700 && h != NULL 701 && (!info->symbolic 702 || !h->def_regular))) 703 { 704 if (h != NULL 705 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 706 && !h->forced_local) 707 { 708 /* Make sure a plt entry is created for this symbol if 709 it turns out to be a function defined by a dynamic 710 object. */ 711 if (h->plt.refcount == -1) 712 h->plt.refcount = 1; 713 else 714 h->plt.refcount++; 715 } 716 break; 717 } 718 /* If this is a local symbol, we can resolve it directly. */ 719 if (h != NULL 720 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 721 || h->forced_local)) 722 break; 723 724 /* Fall through. */ 725 case R_VAX_8: 726 case R_VAX_16: 727 case R_VAX_32: 728 if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) 729 { 730 /* Make sure a plt entry is created for this symbol if it 731 turns out to be a function defined by a dynamic object. */ 732 if (h->plt.refcount == -1) 733 h->plt.refcount = 1; 734 else 735 h->plt.refcount++; 736 } 737 738 /* If we are creating a shared library, we need to copy the 739 reloc into the shared library. */ 740 if (info->shared 741 && (sec->flags & SEC_ALLOC) != 0) 742 { 743 /* When creating a shared object, we must copy these 744 reloc types into the output file. We create a reloc 745 section in dynobj and make room for this reloc. */ 746 if (sreloc == NULL) 747 { 748 sreloc = _bfd_elf_make_dynamic_reloc_section 749 (sec, dynobj, 2, abfd, /*rela?*/ TRUE); 750 751 if (sreloc == NULL) 752 return FALSE; 753 754 if (sec->flags & SEC_READONLY) 755 info->flags |= DF_TEXTREL; 756 } 757 758 sreloc->size += sizeof (Elf32_External_Rela); 759 760 /* If we are linking with -Bsymbolic, we count the number of 761 PC relative relocations we have entered for this symbol, 762 so that we can discard them again if the symbol is later 763 defined by a regular object. Note that this function is 764 only called if we are using a vaxelf linker hash table, 765 which means that h is really a pointer to an 766 elf_vax_link_hash_entry. */ 767 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8 768 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16 769 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32) 770 && info->symbolic) 771 { 772 struct elf_vax_link_hash_entry *eh; 773 struct elf_vax_pcrel_relocs_copied *p; 774 775 eh = (struct elf_vax_link_hash_entry *) h; 776 777 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) 778 if (p->section == sreloc) 779 break; 780 781 if (p == NULL) 782 { 783 p = ((struct elf_vax_pcrel_relocs_copied *) 784 bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); 785 if (p == NULL) 786 return FALSE; 787 p->next = eh->pcrel_relocs_copied; 788 eh->pcrel_relocs_copied = p; 789 p->section = sreloc; 790 p->count = 0; 791 } 792 793 ++p->count; 794 } 795 } 796 797 break; 798 799 /* This relocation describes the C++ object vtable hierarchy. 800 Reconstruct it for later use during GC. */ 801 case R_VAX_GNU_VTINHERIT: 802 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 803 return FALSE; 804 break; 805 806 /* This relocation describes which C++ vtable entries are actually 807 used. Record for later use during GC. */ 808 case R_VAX_GNU_VTENTRY: 809 BFD_ASSERT (h != NULL); 810 if (h != NULL 811 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 812 return FALSE; 813 break; 814 815 default: 816 break; 817 } 818 } 819 820 return TRUE; 821 } 822 823 /* Return the section that should be marked against GC for a given 824 relocation. */ 825 826 static asection * 827 elf_vax_gc_mark_hook (asection *sec, 828 struct bfd_link_info *info, 829 Elf_Internal_Rela *rel, 830 struct elf_link_hash_entry *h, 831 Elf_Internal_Sym *sym) 832 { 833 if (h != NULL) 834 switch (ELF32_R_TYPE (rel->r_info)) 835 { 836 case R_VAX_GNU_VTINHERIT: 837 case R_VAX_GNU_VTENTRY: 838 return NULL; 839 } 840 841 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 842 } 843 844 /* Update the got entry reference counts for the section being removed. */ 845 846 static bfd_boolean 847 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec, 848 const Elf_Internal_Rela *relocs) 849 { 850 Elf_Internal_Shdr *symtab_hdr; 851 struct elf_link_hash_entry **sym_hashes; 852 const Elf_Internal_Rela *rel, *relend; 853 bfd *dynobj; 854 855 if (info->relocatable) 856 return TRUE; 857 858 dynobj = elf_hash_table (info)->dynobj; 859 if (dynobj == NULL) 860 return TRUE; 861 862 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 863 sym_hashes = elf_sym_hashes (abfd); 864 865 relend = relocs + sec->reloc_count; 866 for (rel = relocs; rel < relend; rel++) 867 { 868 unsigned long r_symndx; 869 struct elf_link_hash_entry *h = NULL; 870 871 r_symndx = ELF32_R_SYM (rel->r_info); 872 if (r_symndx >= symtab_hdr->sh_info) 873 { 874 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 875 while (h->root.type == bfd_link_hash_indirect 876 || h->root.type == bfd_link_hash_warning) 877 h = (struct elf_link_hash_entry *) h->root.u.i.link; 878 } 879 880 switch (ELF32_R_TYPE (rel->r_info)) 881 { 882 case R_VAX_GOT32: 883 if (h != NULL && h->got.refcount > 0) 884 --h->got.refcount; 885 break; 886 887 case R_VAX_PLT32: 888 case R_VAX_PC8: 889 case R_VAX_PC16: 890 case R_VAX_PC32: 891 case R_VAX_8: 892 case R_VAX_16: 893 case R_VAX_32: 894 if (h != NULL && h->plt.refcount > 0) 895 --h->plt.refcount; 896 break; 897 898 default: 899 break; 900 } 901 } 902 903 return TRUE; 904 } 905 906 /* Adjust a symbol defined by a dynamic object and referenced by a 907 regular object. The current definition is in some section of the 908 dynamic object, but we're not including those sections. We have to 909 change the definition to something the rest of the link can 910 understand. */ 911 912 static bfd_boolean 913 elf_vax_adjust_dynamic_symbol (info, h) 914 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 /* Set the sizes of the dynamic sections. */ 1051 1052 static bfd_boolean 1053 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) 1054 { 1055 bfd *dynobj; 1056 asection *s; 1057 bfd_boolean plt; 1058 bfd_boolean relocs; 1059 bfd_boolean reltext; 1060 1061 dynobj = elf_hash_table (info)->dynobj; 1062 BFD_ASSERT (dynobj != NULL); 1063 1064 if (elf_hash_table (info)->dynamic_sections_created) 1065 { 1066 /* Set the contents of the .interp section to the interpreter. */ 1067 if (info->executable) 1068 { 1069 s = bfd_get_linker_section (dynobj, ".interp"); 1070 BFD_ASSERT (s != NULL); 1071 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 1072 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 1073 } 1074 } 1075 else 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 it 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 -Bsymbolic shared link, then we need to discard all PC 1094 relative relocs against symbols defined in a regular object. We 1095 allocated space for them in the check_relocs routine, but we will not 1096 fill them in in the relocate_section routine. */ 1097 if (info->shared && info->symbolic) 1098 elf_vax_link_hash_traverse (elf_hash_table (info), 1099 elf_vax_discard_copies, 1100 NULL); 1101 1102 /* If this is a -Bsymbolic shared link or a static link, we need to 1103 discard all the got entries we've recorded. Otherwise, we need to 1104 instantiate (allocate space for them). */ 1105 elf_link_hash_traverse (elf_hash_table (info), 1106 elf_vax_instantiate_got_entries, 1107 info); 1108 1109 /* The check_relocs and adjust_dynamic_symbol entry points have 1110 determined the sizes of the various dynamic sections. Allocate 1111 memory for them. */ 1112 plt = FALSE; 1113 relocs = FALSE; 1114 reltext = FALSE; 1115 for (s = dynobj->sections; s != NULL; s = s->next) 1116 { 1117 const char *name; 1118 1119 if ((s->flags & SEC_LINKER_CREATED) == 0) 1120 continue; 1121 1122 /* It's OK to base decisions on the section name, because none 1123 of the dynobj section names depend upon the input files. */ 1124 name = bfd_get_section_name (dynobj, s); 1125 1126 if (strcmp (name, ".plt") == 0) 1127 { 1128 /* Remember whether there is a PLT. */ 1129 plt = s->size != 0; 1130 } 1131 else if (CONST_STRNEQ (name, ".rela")) 1132 { 1133 if (s->size != 0) 1134 { 1135 asection *target; 1136 1137 /* Remember whether there are any reloc sections other 1138 than .rela.plt. */ 1139 if (strcmp (name, ".rela.plt") != 0) 1140 { 1141 const char *outname; 1142 1143 relocs = TRUE; 1144 1145 /* If this relocation section applies to a read only 1146 section, then we probably need a DT_TEXTREL 1147 entry. .rela.plt is actually associated with 1148 .got.plt, which is never readonly. */ 1149 outname = bfd_get_section_name (output_bfd, 1150 s->output_section); 1151 target = bfd_get_section_by_name (output_bfd, outname + 5); 1152 if (target != NULL 1153 && (target->flags & SEC_READONLY) != 0 1154 && (target->flags & SEC_ALLOC) != 0) 1155 reltext = TRUE; 1156 } 1157 1158 /* We use the reloc_count field as a counter if we need 1159 to copy relocs into the output file. */ 1160 s->reloc_count = 0; 1161 } 1162 } 1163 else if (! CONST_STRNEQ (name, ".got") 1164 && strcmp (name, ".dynbss") != 0) 1165 { 1166 /* It's not one of our sections, so don't allocate space. */ 1167 continue; 1168 } 1169 1170 if (s->size == 0) 1171 { 1172 /* If we don't need this section, strip it from the 1173 output file. This is mostly to handle .rela.bss and 1174 .rela.plt. We must create both sections in 1175 create_dynamic_sections, because they must be created 1176 before the linker maps input sections to output 1177 sections. The linker does that before 1178 adjust_dynamic_symbol is called, and it is that 1179 function which decides whether anything needs to go 1180 into these sections. */ 1181 s->flags |= SEC_EXCLUDE; 1182 continue; 1183 } 1184 1185 if ((s->flags & SEC_HAS_CONTENTS) == 0) 1186 continue; 1187 1188 /* Allocate memory for the section contents. */ 1189 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size); 1190 if (s->contents == NULL) 1191 return FALSE; 1192 } 1193 1194 if (elf_hash_table (info)->dynamic_sections_created) 1195 { 1196 /* Add some entries to the .dynamic section. We fill in the 1197 values later, in elf_vax_finish_dynamic_sections, but we 1198 must add the entries now so that we get the correct size for 1199 the .dynamic section. The DT_DEBUG entry is filled in by the 1200 dynamic linker and used by the debugger. */ 1201 #define add_dynamic_entry(TAG, VAL) \ 1202 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 1203 1204 if (!info->shared) 1205 { 1206 if (!add_dynamic_entry (DT_DEBUG, 0)) 1207 return FALSE; 1208 } 1209 1210 if (plt) 1211 { 1212 if (!add_dynamic_entry (DT_PLTGOT, 0) 1213 || !add_dynamic_entry (DT_PLTRELSZ, 0) 1214 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 1215 || !add_dynamic_entry (DT_JMPREL, 0)) 1216 return FALSE; 1217 } 1218 1219 if (relocs) 1220 { 1221 if (!add_dynamic_entry (DT_RELA, 0) 1222 || !add_dynamic_entry (DT_RELASZ, 0) 1223 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 1224 return FALSE; 1225 } 1226 1227 if (reltext || (info->flags & DF_TEXTREL) != 0) 1228 { 1229 if (!add_dynamic_entry (DT_TEXTREL, 0)) 1230 return FALSE; 1231 } 1232 } 1233 #undef add_dynamic_entry 1234 1235 return TRUE; 1236 } 1237 1238 /* This function is called via elf_vax_link_hash_traverse if we are 1239 creating a shared object with -Bsymbolic. It discards the space 1240 allocated to copy PC relative relocs against symbols which are defined 1241 in regular objects. We allocated space for them in the check_relocs 1242 routine, but we won't fill them in in the relocate_section routine. */ 1243 1244 static bfd_boolean 1245 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h, 1246 void * ignore ATTRIBUTE_UNUSED) 1247 { 1248 struct elf_vax_pcrel_relocs_copied *s; 1249 1250 /* We only discard relocs for symbols defined in a regular object. */ 1251 if (!h->root.def_regular) 1252 return TRUE; 1253 1254 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) 1255 s->section->size -= s->count * sizeof (Elf32_External_Rela); 1256 1257 return TRUE; 1258 } 1259 1260 /* This function is called via elf_link_hash_traverse. It looks for entries 1261 that have GOT or PLT (.GOT) references. If creating a static object or a 1262 shared object with -Bsymbolic, it resets the reference count back to 0 1263 and sets the offset to -1 so normal PC32 relocation will be done. If 1264 creating a shared object or executable, space in the .got and .rela.got 1265 will be reserved for the symbol. */ 1266 1267 static bfd_boolean 1268 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, void * infoptr) 1269 { 1270 struct bfd_link_info *info = (struct bfd_link_info *) infoptr; 1271 bfd *dynobj; 1272 asection *sgot; 1273 asection *srelgot; 1274 1275 /* We don't care about non-GOT (and non-PLT) entries. */ 1276 if (h->got.refcount <= 0 && h->plt.refcount <= 0) 1277 return TRUE; 1278 1279 dynobj = elf_hash_table (info)->dynobj; 1280 if (dynobj == NULL) 1281 return TRUE; 1282 1283 sgot = bfd_get_linker_section (dynobj, ".got"); 1284 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 1285 1286 if (!elf_hash_table (info)->dynamic_sections_created 1287 || (info->shared && info->symbolic) 1288 || h->forced_local) 1289 { 1290 h->got.refcount = 0; 1291 h->got.offset = (bfd_vma) -1; 1292 h->plt.refcount = 0; 1293 h->plt.offset = (bfd_vma) -1; 1294 } 1295 else if (h->got.refcount > 0) 1296 { 1297 bfd_boolean dyn; 1298 1299 /* Make sure this symbol is output as a dynamic symbol. */ 1300 if (h->dynindx == -1) 1301 { 1302 if (!bfd_elf_link_record_dynamic_symbol (info, h)) 1303 return FALSE; 1304 } 1305 1306 dyn = elf_hash_table (info)->dynamic_sections_created; 1307 /* Allocate space in the .got and .rela.got sections. */ 1308 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1309 && (info->shared 1310 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) 1311 { 1312 sgot->size += 4; 1313 srelgot->size += sizeof (Elf32_External_Rela); 1314 } 1315 } 1316 1317 return TRUE; 1318 } 1319 1320 /* Relocate an VAX ELF section. */ 1321 1322 static bfd_boolean 1323 elf_vax_relocate_section (bfd *output_bfd, 1324 struct bfd_link_info *info, 1325 bfd *input_bfd, 1326 asection *input_section, 1327 bfd_byte *contents, 1328 Elf_Internal_Rela *relocs, 1329 Elf_Internal_Sym *local_syms, 1330 asection **local_sections) 1331 { 1332 bfd *dynobj; 1333 Elf_Internal_Shdr *symtab_hdr; 1334 struct elf_link_hash_entry **sym_hashes; 1335 bfd_vma plt_index; 1336 bfd_vma got_offset; 1337 asection *sgot; 1338 asection *splt; 1339 asection *sgotplt; 1340 asection *sreloc; 1341 Elf_Internal_Rela *rel; 1342 Elf_Internal_Rela *relend; 1343 1344 dynobj = elf_hash_table (info)->dynobj; 1345 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 1346 sym_hashes = elf_sym_hashes (input_bfd); 1347 1348 sgot = NULL; 1349 splt = NULL; 1350 sgotplt = NULL; 1351 sreloc = NULL; 1352 1353 rel = relocs; 1354 relend = relocs + input_section->reloc_count; 1355 for (; rel < relend; rel++) 1356 { 1357 int r_type; 1358 reloc_howto_type *howto; 1359 unsigned long r_symndx; 1360 struct elf_link_hash_entry *h; 1361 Elf_Internal_Sym *sym; 1362 asection *sec; 1363 bfd_vma relocation; 1364 bfd_reloc_status_type r; 1365 1366 r_type = ELF32_R_TYPE (rel->r_info); 1367 if (r_type < 0 || r_type >= (int) R_VAX_max) 1368 { 1369 bfd_set_error (bfd_error_bad_value); 1370 return FALSE; 1371 } 1372 howto = howto_table + r_type; 1373 1374 r_symndx = ELF32_R_SYM (rel->r_info); 1375 h = NULL; 1376 sym = NULL; 1377 sec = NULL; 1378 if (r_symndx < symtab_hdr->sh_info) 1379 { 1380 sym = local_syms + r_symndx; 1381 sec = local_sections[r_symndx]; 1382 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 1383 } 1384 else 1385 { 1386 bfd_boolean unresolved_reloc; 1387 bfd_boolean warned; 1388 1389 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 1390 r_symndx, symtab_hdr, sym_hashes, 1391 h, sec, relocation, 1392 unresolved_reloc, warned); 1393 1394 if ((h->root.type == bfd_link_hash_defined 1395 || h->root.type == bfd_link_hash_defweak) 1396 && ((r_type == R_VAX_PLT32 1397 && h->plt.offset != (bfd_vma) -1 1398 && !h->forced_local 1399 && elf_hash_table (info)->dynamic_sections_created) 1400 || (r_type == R_VAX_GOT32 1401 && h->got.offset != (bfd_vma) -1 1402 && !h->forced_local 1403 && elf_hash_table (info)->dynamic_sections_created 1404 && (! info->shared 1405 || (! info->symbolic && h->dynindx != -1) 1406 || !h->def_regular)) 1407 || (info->shared 1408 && ((! info->symbolic && h->dynindx != -1) 1409 || !h->def_regular) 1410 && ((input_section->flags & SEC_ALLOC) != 0 1411 /* DWARF will emit R_VAX_32 relocations in its 1412 sections against symbols defined externally 1413 in shared libraries. We can't do anything 1414 with them here. */ 1415 1416 || ((input_section->flags & SEC_DEBUGGING) != 0 1417 && h->def_dynamic)) 1418 && (r_type == R_VAX_8 1419 || r_type == R_VAX_16 1420 || r_type == R_VAX_32)))) 1421 /* In these cases, we don't need the relocation 1422 value. We check specially because in some 1423 obscure cases sec->output_section will be NULL. */ 1424 relocation = 0; 1425 } 1426 1427 if (sec != NULL && discarded_section (sec)) 1428 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 1429 rel, 1, relend, howto, 0, contents); 1430 1431 if (info->relocatable) 1432 continue; 1433 1434 switch (r_type) 1435 { 1436 case R_VAX_GOT32: 1437 /* Relocation is to the address of the entry for this symbol 1438 in the global offset table. */ 1439 if (h == NULL 1440 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 1441 || h->got.offset == (bfd_vma) -1 1442 || h->forced_local) 1443 break; 1444 1445 /* Relocation is the offset of the entry for this symbol in 1446 the global offset table. */ 1447 1448 { 1449 bfd_boolean dyn; 1450 bfd_vma off; 1451 1452 if (sgot == NULL) 1453 { 1454 sgot = bfd_get_linker_section (dynobj, ".got"); 1455 BFD_ASSERT (sgot != NULL); 1456 } 1457 1458 BFD_ASSERT (h != NULL); 1459 off = h->got.offset; 1460 BFD_ASSERT (off != (bfd_vma) -1); 1461 BFD_ASSERT (off < sgot->size); 1462 1463 dyn = elf_hash_table (info)->dynamic_sections_created; 1464 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 1465 || (info->shared 1466 && SYMBOL_REFERENCES_LOCAL (info, h))) 1467 { 1468 /* The symbol was forced to be local 1469 because of a version file.. We must initialize 1470 this entry in the global offset table. Since 1471 the offset must always be a multiple of 4, we 1472 use the least significant bit to record whether 1473 we have initialized it already. 1474 1475 When doing a dynamic link, we create a .rela.got 1476 relocation entry to initialize the value. This 1477 is done in the finish_dynamic_symbol routine. */ 1478 if ((off & 1) != 0) 1479 off &= ~1; 1480 else 1481 { 1482 bfd_put_32 (output_bfd, relocation + rel->r_addend, 1483 sgot->contents + off); 1484 h->got.offset |= 1; 1485 } 1486 } else { 1487 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off); 1488 } 1489 1490 relocation = sgot->output_offset + off; 1491 /* The GOT relocation uses the addend. */ 1492 rel->r_addend = 0; 1493 1494 /* Change the reference to be indirect. */ 1495 contents[rel->r_offset - 1] |= 0x10; 1496 relocation += sgot->output_section->vma; 1497 } 1498 break; 1499 1500 case R_VAX_PC32: 1501 /* If we are creating an executable and the function this 1502 reloc refers to is in a shared lib, then we made a PLT 1503 entry for this symbol and need to handle the reloc like 1504 a PLT reloc. */ 1505 if (info->shared) 1506 goto r_vax_pc32_shared; 1507 /* Fall through. */ 1508 case R_VAX_PLT32: 1509 /* Relocation is to the entry for this symbol in the 1510 procedure linkage table. */ 1511 1512 /* Resolve a PLTxx reloc against a local symbol directly, 1513 without using the procedure linkage table. */ 1514 if (h == NULL 1515 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 1516 || h->forced_local) 1517 break; 1518 1519 if (h->plt.offset == (bfd_vma) -1 1520 || !elf_hash_table (info)->dynamic_sections_created) 1521 { 1522 /* We didn't make a PLT entry for this symbol. This 1523 happens when statically linking PIC code, or when 1524 using -Bsymbolic. */ 1525 break; 1526 } 1527 1528 if (splt == NULL) 1529 { 1530 splt = bfd_get_linker_section (dynobj, ".plt"); 1531 BFD_ASSERT (splt != NULL); 1532 } 1533 1534 if (sgotplt == NULL) 1535 { 1536 sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); 1537 BFD_ASSERT (sgotplt != NULL); 1538 } 1539 1540 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; 1541 1542 /* Get the offset into the .got table of the entry that 1543 corresponds to this function. Each .got entry is 4 bytes. 1544 The first two are reserved. */ 1545 got_offset = (plt_index + 3) * 4; 1546 1547 /* We want the relocation to point into the .got.plt instead 1548 of the plt itself. */ 1549 relocation = (sgotplt->output_section->vma 1550 + sgotplt->output_offset 1551 + got_offset); 1552 contents[rel->r_offset-1] |= 0x10; /* make indirect */ 1553 if (rel->r_addend == 2) 1554 { 1555 h->plt.offset |= 1; 1556 } 1557 else if (rel->r_addend != 0) 1558 (*_bfd_error_handler) 1559 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"), 1560 bfd_get_filename (input_bfd), rel->r_addend, 1561 h->root.root.string, 1562 bfd_get_section_name (input_bfd, input_section)); 1563 rel->r_addend = 0; 1564 1565 break; 1566 1567 case R_VAX_PC8: 1568 case R_VAX_PC16: 1569 r_vax_pc32_shared: 1570 if (h == NULL 1571 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 1572 || h->forced_local) 1573 break; 1574 /* Fall through. */ 1575 case R_VAX_8: 1576 case R_VAX_16: 1577 case R_VAX_32: 1578 if (info->shared 1579 && r_symndx != STN_UNDEF 1580 && (input_section->flags & SEC_ALLOC) != 0 1581 && ((r_type != R_VAX_PC8 1582 && r_type != R_VAX_PC16 1583 && r_type != R_VAX_PC32) 1584 || ((input_section->flags & SEC_CODE) 1585 && (!info->symbolic 1586 || (!h->def_regular && h->type != STT_SECTION))))) 1587 { 1588 Elf_Internal_Rela outrel; 1589 bfd_byte *loc; 1590 bfd_boolean skip, relocate; 1591 1592 /* When generating a shared object, these relocations 1593 are copied into the output file to be resolved at run 1594 time. */ 1595 if (sreloc == NULL) 1596 { 1597 sreloc = _bfd_elf_get_dynamic_reloc_section 1598 (input_bfd, input_section, /*rela?*/ TRUE); 1599 if (sreloc == NULL) 1600 return FALSE; 1601 } 1602 1603 skip = FALSE; 1604 relocate = FALSE; 1605 1606 outrel.r_offset = 1607 _bfd_elf_section_offset (output_bfd, info, input_section, 1608 rel->r_offset); 1609 if (outrel.r_offset == (bfd_vma) -1) 1610 skip = TRUE; 1611 if (outrel.r_offset == (bfd_vma) -2) 1612 skip = TRUE, relocate = TRUE; 1613 outrel.r_offset += (input_section->output_section->vma 1614 + input_section->output_offset); 1615 1616 if (skip) 1617 memset (&outrel, 0, sizeof outrel); 1618 /* h->dynindx may be -1 if the symbol was marked to 1619 become local. */ 1620 else if (h != NULL 1621 && ((! info->symbolic && h->dynindx != -1) 1622 || !h->def_regular)) 1623 { 1624 BFD_ASSERT (h->dynindx != -1); 1625 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 1626 outrel.r_addend = relocation + rel->r_addend; 1627 } 1628 else 1629 { 1630 if (r_type == R_VAX_32) 1631 { 1632 relocate = TRUE; 1633 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE); 1634 BFD_ASSERT (bfd_get_signed_32 (input_bfd, 1635 &contents[rel->r_offset]) == 0); 1636 outrel.r_addend = relocation + rel->r_addend; 1637 } 1638 else 1639 { 1640 long indx; 1641 1642 if (bfd_is_abs_section (sec)) 1643 indx = 0; 1644 else if (sec == NULL || sec->owner == NULL) 1645 { 1646 bfd_set_error (bfd_error_bad_value); 1647 return FALSE; 1648 } 1649 else 1650 { 1651 asection *osec; 1652 1653 /* We are turning this relocation into one 1654 against a section symbol. It would be 1655 proper to subtract the symbol's value, 1656 osec->vma, from the emitted reloc addend, 1657 but ld.so expects buggy relocs. */ 1658 osec = sec->output_section; 1659 indx = elf_section_data (osec)->dynindx; 1660 if (indx == 0) 1661 { 1662 struct elf_link_hash_table *htab; 1663 htab = elf_hash_table (info); 1664 osec = htab->text_index_section; 1665 indx = elf_section_data (osec)->dynindx; 1666 } 1667 BFD_ASSERT (indx != 0); 1668 } 1669 1670 outrel.r_info = ELF32_R_INFO (indx, r_type); 1671 outrel.r_addend = relocation + rel->r_addend; 1672 } 1673 } 1674 1675 if ((input_section->flags & SEC_CODE) != 0 1676 || (ELF32_R_TYPE (outrel.r_info) != R_VAX_32 1677 && ELF32_R_TYPE (outrel.r_info) != R_VAX_RELATIVE 1678 && ELF32_R_TYPE (outrel.r_info) != R_VAX_COPY 1679 && ELF32_R_TYPE (outrel.r_info) != R_VAX_JMP_SLOT 1680 && ELF32_R_TYPE (outrel.r_info) != R_VAX_GLOB_DAT)) 1681 { 1682 if (h != NULL) 1683 (*_bfd_error_handler) 1684 (_("%s: warning: %s relocation against symbol `%s' from %s section"), 1685 bfd_get_filename (input_bfd), howto->name, 1686 h->root.root.string, 1687 bfd_get_section_name (input_bfd, input_section)); 1688 else 1689 (*_bfd_error_handler) 1690 (_("%s: warning: %s relocation to 0x%x from %s section"), 1691 bfd_get_filename (input_bfd), howto->name, 1692 outrel.r_addend, 1693 bfd_get_section_name (input_bfd, input_section)); 1694 } 1695 loc = sreloc->contents; 1696 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 1697 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1698 1699 /* This reloc will be computed at runtime, so there's no 1700 need to do anything now, except for R_VAX_32 1701 relocations that have been turned into 1702 R_VAX_RELATIVE. */ 1703 if (!relocate) 1704 continue; 1705 } 1706 1707 break; 1708 1709 case R_VAX_GNU_VTINHERIT: 1710 case R_VAX_GNU_VTENTRY: 1711 /* These are no-ops in the end. */ 1712 continue; 1713 1714 default: 1715 break; 1716 } 1717 1718 /* VAX PCREL relocations are from the end of relocation, not the start. 1719 So subtract the difference from the relocation amount since we can't 1720 add it to the offset. */ 1721 if (howto->pc_relative && howto->pcrel_offset) 1722 relocation -= bfd_get_reloc_size(howto); 1723 1724 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 1725 contents, rel->r_offset, 1726 relocation, rel->r_addend); 1727 1728 if (r != bfd_reloc_ok) 1729 { 1730 switch (r) 1731 { 1732 default: 1733 case bfd_reloc_outofrange: 1734 abort (); 1735 case bfd_reloc_overflow: 1736 { 1737 const char *name; 1738 1739 if (h != NULL) 1740 name = NULL; 1741 else 1742 { 1743 name = bfd_elf_string_from_elf_section (input_bfd, 1744 symtab_hdr->sh_link, 1745 sym->st_name); 1746 if (name == NULL) 1747 return FALSE; 1748 if (*name == '\0') 1749 name = bfd_section_name (input_bfd, sec); 1750 } 1751 if (!(info->callbacks->reloc_overflow 1752 (info, (h ? &h->root : NULL), name, howto->name, 1753 (bfd_vma) 0, input_bfd, input_section, 1754 rel->r_offset))) 1755 return FALSE; 1756 } 1757 break; 1758 } 1759 } 1760 } 1761 1762 return TRUE; 1763 } 1764 1765 /* Finish up dynamic symbol handling. We set the contents of various 1766 dynamic sections here. */ 1767 1768 static bfd_boolean 1769 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info, 1770 struct elf_link_hash_entry *h, 1771 Elf_Internal_Sym *sym) 1772 { 1773 bfd *dynobj; 1774 1775 dynobj = elf_hash_table (info)->dynobj; 1776 1777 if (h->plt.offset != (bfd_vma) -1) 1778 { 1779 asection *splt; 1780 asection *sgot; 1781 asection *srela; 1782 bfd_vma plt_index; 1783 bfd_vma got_offset; 1784 bfd_vma addend; 1785 Elf_Internal_Rela rela; 1786 bfd_byte *loc; 1787 1788 /* This symbol has an entry in the procedure linkage table. Set 1789 it up. */ 1790 BFD_ASSERT (h->dynindx != -1); 1791 1792 splt = bfd_get_linker_section (dynobj, ".plt"); 1793 sgot = bfd_get_linker_section (dynobj, ".got.plt"); 1794 srela = bfd_get_linker_section (dynobj, ".rela.plt"); 1795 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); 1796 1797 addend = 2 * (h->plt.offset & 1); 1798 h->plt.offset &= ~1; 1799 1800 /* Get the index in the procedure linkage table which 1801 corresponds to this symbol. This is the index of this symbol 1802 in all the symbols for which we are making plt entries. The 1803 first entry in the procedure linkage table is reserved. */ 1804 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; 1805 1806 /* Get the offset into the .got table of the entry that 1807 corresponds to this function. Each .got entry is 4 bytes. 1808 The first two are reserved. */ 1809 got_offset = (plt_index + 3) * 4; 1810 1811 /* Fill in the entry in the procedure linkage table. */ 1812 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry, 1813 PLT_ENTRY_SIZE); 1814 1815 /* The offset is relative to the first extension word. */ 1816 bfd_put_32 (output_bfd, 1817 -(h->plt.offset + 8), 1818 splt->contents + h->plt.offset + 4); 1819 1820 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), 1821 splt->contents + h->plt.offset + 8); 1822 1823 /* Fill in the entry in the global offset table. */ 1824 bfd_put_32 (output_bfd, 1825 (splt->output_section->vma 1826 + splt->output_offset 1827 + h->plt.offset) + addend, 1828 sgot->contents + got_offset); 1829 1830 /* Fill in the entry in the .rela.plt section. */ 1831 rela.r_offset = (sgot->output_section->vma 1832 + sgot->output_offset 1833 + got_offset); 1834 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT); 1835 rela.r_addend = addend; 1836 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela); 1837 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1838 1839 if (!h->def_regular) 1840 { 1841 /* Mark the symbol as undefined, rather than as defined in 1842 the .plt section. Leave the value alone. */ 1843 sym->st_shndx = SHN_UNDEF; 1844 } 1845 } 1846 1847 if (h->got.offset != (bfd_vma) -1) 1848 { 1849 asection *sgot; 1850 asection *srela; 1851 Elf_Internal_Rela rela; 1852 bfd_byte *loc; 1853 1854 /* This symbol has an entry in the global offset table. Set it 1855 up. */ 1856 sgot = bfd_get_linker_section (dynobj, ".got"); 1857 srela = bfd_get_linker_section (dynobj, ".rela.got"); 1858 BFD_ASSERT (sgot != NULL && srela != NULL); 1859 1860 rela.r_offset = (sgot->output_section->vma 1861 + sgot->output_offset 1862 + (h->got.offset &~ 1)); 1863 1864 /* If the symbol was forced to be local because of a version file 1865 locally we just want to emit a RELATIVE reloc. The entry in 1866 the global offset table will already have been initialized in 1867 the relocate_section function. */ 1868 if (info->shared 1869 && h->dynindx == -1 1870 && h->def_regular) 1871 { 1872 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE); 1873 } 1874 else 1875 { 1876 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT); 1877 } 1878 rela.r_addend = bfd_get_signed_32 (output_bfd, 1879 (sgot->contents 1880 + (h->got.offset & ~1))); 1881 1882 loc = srela->contents; 1883 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); 1884 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1885 } 1886 1887 if (h->needs_copy) 1888 { 1889 asection *s; 1890 Elf_Internal_Rela rela; 1891 bfd_byte *loc; 1892 1893 /* This symbol needs a copy reloc. Set it up. */ 1894 BFD_ASSERT (h->dynindx != -1 1895 && (h->root.type == bfd_link_hash_defined 1896 || h->root.type == bfd_link_hash_defweak)); 1897 1898 s = bfd_get_linker_section (dynobj, ".rela.bss"); 1899 BFD_ASSERT (s != NULL); 1900 1901 rela.r_offset = (h->root.u.def.value 1902 + h->root.u.def.section->output_section->vma 1903 + h->root.u.def.section->output_offset); 1904 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY); 1905 rela.r_addend = 0; 1906 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); 1907 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1908 } 1909 1910 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ 1911 if (h == elf_hash_table (info)->hdynamic 1912 || h == elf_hash_table (info)->hgot) 1913 sym->st_shndx = SHN_ABS; 1914 1915 return TRUE; 1916 } 1917 1918 /* Finish up the dynamic sections. */ 1919 1920 static bfd_boolean 1921 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) 1922 { 1923 bfd *dynobj; 1924 asection *sgot; 1925 asection *sdyn; 1926 1927 dynobj = elf_hash_table (info)->dynobj; 1928 1929 sgot = bfd_get_linker_section (dynobj, ".got.plt"); 1930 BFD_ASSERT (sgot != NULL); 1931 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 1932 1933 if (elf_hash_table (info)->dynamic_sections_created) 1934 { 1935 asection *splt; 1936 Elf32_External_Dyn *dyncon, *dynconend; 1937 1938 splt = bfd_get_linker_section (dynobj, ".plt"); 1939 BFD_ASSERT (splt != NULL && sdyn != NULL); 1940 1941 dyncon = (Elf32_External_Dyn *) sdyn->contents; 1942 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 1943 for (; dyncon < dynconend; dyncon++) 1944 { 1945 Elf_Internal_Dyn dyn; 1946 const char *name; 1947 asection *s; 1948 1949 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 1950 1951 switch (dyn.d_tag) 1952 { 1953 default: 1954 break; 1955 1956 case DT_PLTGOT: 1957 name = ".got"; 1958 goto get_vma; 1959 case DT_JMPREL: 1960 name = ".rela.plt"; 1961 get_vma: 1962 s = bfd_get_section_by_name (output_bfd, name); 1963 BFD_ASSERT (s != NULL); 1964 dyn.d_un.d_ptr = s->vma; 1965 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 1966 break; 1967 1968 case DT_PLTRELSZ: 1969 s = bfd_get_section_by_name (output_bfd, ".rela.plt"); 1970 BFD_ASSERT (s != NULL); 1971 dyn.d_un.d_val = s->size; 1972 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 1973 break; 1974 1975 case DT_RELASZ: 1976 /* The procedure linkage table relocs (DT_JMPREL) should 1977 not be included in the overall relocs (DT_RELA). 1978 Therefore, we override the DT_RELASZ entry here to 1979 make it not include the JMPREL relocs. Since the 1980 linker script arranges for .rela.plt to follow all 1981 other relocation sections, we don't have to worry 1982 about changing the DT_RELA entry. */ 1983 s = bfd_get_section_by_name (output_bfd, ".rela.plt"); 1984 if (s != NULL) 1985 dyn.d_un.d_val -= s->size; 1986 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 1987 break; 1988 } 1989 } 1990 1991 /* Fill in the first entry in the procedure linkage table. */ 1992 if (splt->size > 0) 1993 { 1994 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE); 1995 bfd_put_32 (output_bfd, 1996 (sgot->output_section->vma 1997 + sgot->output_offset + 4 1998 - (splt->output_section->vma + 6)), 1999 splt->contents + 2); 2000 bfd_put_32 (output_bfd, 2001 (sgot->output_section->vma 2002 + sgot->output_offset + 8 2003 - (splt->output_section->vma + 12)), 2004 splt->contents + 8); 2005 elf_section_data (splt->output_section)->this_hdr.sh_entsize 2006 = PLT_ENTRY_SIZE; 2007 } 2008 } 2009 2010 /* Fill in the first three entries in the global offset table. */ 2011 if (sgot->size > 0) 2012 { 2013 if (sdyn == NULL) 2014 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 2015 else 2016 bfd_put_32 (output_bfd, 2017 sdyn->output_section->vma + sdyn->output_offset, 2018 sgot->contents); 2019 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); 2020 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); 2021 } 2022 2023 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 2024 2025 return TRUE; 2026 } 2027 2028 static enum elf_reloc_type_class 2029 elf_vax_reloc_type_class (const Elf_Internal_Rela *rela) 2030 { 2031 switch ((int) ELF32_R_TYPE (rela->r_info)) 2032 { 2033 case R_VAX_RELATIVE: 2034 return reloc_class_relative; 2035 case R_VAX_JMP_SLOT: 2036 return reloc_class_plt; 2037 case R_VAX_COPY: 2038 return reloc_class_copy; 2039 default: 2040 return reloc_class_normal; 2041 } 2042 } 2043 2044 static bfd_vma 2045 elf_vax_plt_sym_val (bfd_vma i, const asection *plt, 2046 const arelent *rel ATTRIBUTE_UNUSED) 2047 { 2048 return plt->vma + (i + 1) * PLT_ENTRY_SIZE; 2049 } 2050 2051 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec 2052 #define TARGET_LITTLE_NAME "elf32-vax" 2053 #define ELF_MACHINE_CODE EM_VAX 2054 #define ELF_MAXPAGESIZE 0x1000 2055 2056 #define elf_backend_create_dynamic_sections \ 2057 _bfd_elf_create_dynamic_sections 2058 #define bfd_elf32_bfd_link_hash_table_create \ 2059 elf_vax_link_hash_table_create 2060 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link 2061 2062 #define elf_backend_check_relocs elf_vax_check_relocs 2063 #define elf_backend_adjust_dynamic_symbol \ 2064 elf_vax_adjust_dynamic_symbol 2065 #define elf_backend_size_dynamic_sections \ 2066 elf_vax_size_dynamic_sections 2067 #define elf_backend_init_index_section _bfd_elf_init_1_index_section 2068 #define elf_backend_relocate_section elf_vax_relocate_section 2069 #define elf_backend_finish_dynamic_symbol \ 2070 elf_vax_finish_dynamic_symbol 2071 #define elf_backend_finish_dynamic_sections \ 2072 elf_vax_finish_dynamic_sections 2073 #define elf_backend_reloc_type_class elf_vax_reloc_type_class 2074 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook 2075 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook 2076 #define elf_backend_plt_sym_val elf_vax_plt_sym_val 2077 #define bfd_elf32_bfd_merge_private_bfd_data \ 2078 elf32_vax_merge_private_bfd_data 2079 #define bfd_elf32_bfd_set_private_flags \ 2080 elf32_vax_set_private_flags 2081 #define bfd_elf32_bfd_print_private_bfd_data \ 2082 elf32_vax_print_private_bfd_data 2083 2084 #define elf_backend_can_gc_sections 1 2085 #define elf_backend_want_got_plt 1 2086 #define elf_backend_plt_readonly 1 2087 #define elf_backend_want_plt_sym 0 2088 #define elf_backend_got_header_size 16 2089 #define elf_backend_rela_normal 1 2090 2091 #include "elf32-target.h" 2092