1 /* SPARC-specific support for 64-bit ELF 2 Copyright (C) 1993-2016 Free Software Foundation, Inc. 3 4 This file is part of BFD, the Binary File Descriptor library. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 19 MA 02110-1301, USA. */ 20 21 #include "sysdep.h" 22 #include "bfd.h" 23 #include "libbfd.h" 24 #include "elf-bfd.h" 25 #include "elf/sparc.h" 26 #include "opcode/sparc.h" 27 #include "elfxx-sparc.h" 28 29 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ 30 #define MINUS_ONE (~ (bfd_vma) 0) 31 32 /* Due to the way how we handle R_SPARC_OLO10, each entry in a SHT_RELA 33 section can represent up to two relocs, we must tell the user to allocate 34 more space. */ 35 36 static long 37 elf64_sparc_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) 38 { 39 return (sec->reloc_count * 2 + 1) * sizeof (arelent *); 40 } 41 42 static long 43 elf64_sparc_get_dynamic_reloc_upper_bound (bfd *abfd) 44 { 45 return _bfd_elf_get_dynamic_reloc_upper_bound (abfd) * 2; 46 } 47 48 /* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of 49 them. We cannot use generic elf routines for this, because R_SPARC_OLO10 50 has secondary addend in ELF64_R_TYPE_DATA. We handle it as two relocations 51 for the same location, R_SPARC_LO10 and R_SPARC_13. */ 52 53 static bfd_boolean 54 elf64_sparc_slurp_one_reloc_table (bfd *abfd, asection *asect, 55 Elf_Internal_Shdr *rel_hdr, 56 asymbol **symbols, bfd_boolean dynamic) 57 { 58 void * allocated = NULL; 59 bfd_byte *native_relocs; 60 arelent *relent; 61 unsigned int i; 62 int entsize; 63 bfd_size_type count; 64 arelent *relents; 65 66 allocated = bfd_malloc (rel_hdr->sh_size); 67 if (allocated == NULL) 68 goto error_return; 69 70 if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0 71 || bfd_bread (allocated, rel_hdr->sh_size, abfd) != rel_hdr->sh_size) 72 goto error_return; 73 74 native_relocs = (bfd_byte *) allocated; 75 76 relents = asect->relocation + canon_reloc_count (asect); 77 78 entsize = rel_hdr->sh_entsize; 79 BFD_ASSERT (entsize == sizeof (Elf64_External_Rela)); 80 81 count = rel_hdr->sh_size / entsize; 82 83 for (i = 0, relent = relents; i < count; 84 i++, relent++, native_relocs += entsize) 85 { 86 Elf_Internal_Rela rela; 87 unsigned int r_type; 88 89 bfd_elf64_swap_reloca_in (abfd, native_relocs, &rela); 90 91 /* The address of an ELF reloc is section relative for an object 92 file, and absolute for an executable file or shared library. 93 The address of a normal BFD reloc is always section relative, 94 and the address of a dynamic reloc is absolute.. */ 95 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic) 96 relent->address = rela.r_offset; 97 else 98 relent->address = rela.r_offset - asect->vma; 99 100 if (ELF64_R_SYM (rela.r_info) == STN_UNDEF 101 /* PR 17512: file: 996185f8. */ 102 || ELF64_R_SYM (rela.r_info) > bfd_get_symcount (abfd)) 103 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; 104 else 105 { 106 asymbol **ps, *s; 107 108 ps = symbols + ELF64_R_SYM (rela.r_info) - 1; 109 s = *ps; 110 111 /* Canonicalize ELF section symbols. FIXME: Why? */ 112 if ((s->flags & BSF_SECTION_SYM) == 0) 113 relent->sym_ptr_ptr = ps; 114 else 115 relent->sym_ptr_ptr = s->section->symbol_ptr_ptr; 116 } 117 118 relent->addend = rela.r_addend; 119 120 r_type = ELF64_R_TYPE_ID (rela.r_info); 121 if (r_type == R_SPARC_OLO10) 122 { 123 relent->howto = _bfd_sparc_elf_info_to_howto_ptr (R_SPARC_LO10); 124 relent[1].address = relent->address; 125 relent++; 126 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; 127 relent->addend = ELF64_R_TYPE_DATA (rela.r_info); 128 relent->howto = _bfd_sparc_elf_info_to_howto_ptr (R_SPARC_13); 129 } 130 else 131 relent->howto = _bfd_sparc_elf_info_to_howto_ptr (r_type); 132 } 133 134 canon_reloc_count (asect) += relent - relents; 135 136 if (allocated != NULL) 137 free (allocated); 138 139 return TRUE; 140 141 error_return: 142 if (allocated != NULL) 143 free (allocated); 144 return FALSE; 145 } 146 147 /* Read in and swap the external relocs. */ 148 149 static bfd_boolean 150 elf64_sparc_slurp_reloc_table (bfd *abfd, asection *asect, 151 asymbol **symbols, bfd_boolean dynamic) 152 { 153 struct bfd_elf_section_data * const d = elf_section_data (asect); 154 Elf_Internal_Shdr *rel_hdr; 155 Elf_Internal_Shdr *rel_hdr2; 156 bfd_size_type amt; 157 158 if (asect->relocation != NULL) 159 return TRUE; 160 161 if (! dynamic) 162 { 163 if ((asect->flags & SEC_RELOC) == 0 164 || asect->reloc_count == 0) 165 return TRUE; 166 167 rel_hdr = d->rel.hdr; 168 rel_hdr2 = d->rela.hdr; 169 170 BFD_ASSERT ((rel_hdr && asect->rel_filepos == rel_hdr->sh_offset) 171 || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset)); 172 } 173 else 174 { 175 /* Note that ASECT->RELOC_COUNT tends not to be accurate in this 176 case because relocations against this section may use the 177 dynamic symbol table, and in that case bfd_section_from_shdr 178 in elf.c does not update the RELOC_COUNT. */ 179 if (asect->size == 0) 180 return TRUE; 181 182 rel_hdr = &d->this_hdr; 183 asect->reloc_count = NUM_SHDR_ENTRIES (rel_hdr); 184 rel_hdr2 = NULL; 185 } 186 187 amt = asect->reloc_count; 188 amt *= 2 * sizeof (arelent); 189 asect->relocation = (arelent *) bfd_alloc (abfd, amt); 190 if (asect->relocation == NULL) 191 return FALSE; 192 193 /* The elf64_sparc_slurp_one_reloc_table routine increments 194 canon_reloc_count. */ 195 canon_reloc_count (asect) = 0; 196 197 if (rel_hdr 198 && !elf64_sparc_slurp_one_reloc_table (abfd, asect, rel_hdr, symbols, 199 dynamic)) 200 return FALSE; 201 202 if (rel_hdr2 203 && !elf64_sparc_slurp_one_reloc_table (abfd, asect, rel_hdr2, symbols, 204 dynamic)) 205 return FALSE; 206 207 return TRUE; 208 } 209 210 /* Canonicalize the relocs. */ 211 212 static long 213 elf64_sparc_canonicalize_reloc (bfd *abfd, sec_ptr section, 214 arelent **relptr, asymbol **symbols) 215 { 216 arelent *tblptr; 217 unsigned int i; 218 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 219 220 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE)) 221 return -1; 222 223 tblptr = section->relocation; 224 for (i = 0; i < canon_reloc_count (section); i++) 225 *relptr++ = tblptr++; 226 227 *relptr = NULL; 228 229 return canon_reloc_count (section); 230 } 231 232 233 /* Canonicalize the dynamic relocation entries. Note that we return 234 the dynamic relocations as a single block, although they are 235 actually associated with particular sections; the interface, which 236 was designed for SunOS style shared libraries, expects that there 237 is only one set of dynamic relocs. Any section that was actually 238 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses 239 the dynamic symbol table, is considered to be a dynamic reloc 240 section. */ 241 242 static long 243 elf64_sparc_canonicalize_dynamic_reloc (bfd *abfd, arelent **storage, 244 asymbol **syms) 245 { 246 asection *s; 247 long ret; 248 249 if (elf_dynsymtab (abfd) == 0) 250 { 251 bfd_set_error (bfd_error_invalid_operation); 252 return -1; 253 } 254 255 ret = 0; 256 for (s = abfd->sections; s != NULL; s = s->next) 257 { 258 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd) 259 && (elf_section_data (s)->this_hdr.sh_type == SHT_RELA)) 260 { 261 arelent *p; 262 long count, i; 263 264 if (! elf64_sparc_slurp_reloc_table (abfd, s, syms, TRUE)) 265 return -1; 266 count = canon_reloc_count (s); 267 p = s->relocation; 268 for (i = 0; i < count; i++) 269 *storage++ = p++; 270 ret += count; 271 } 272 } 273 274 *storage = NULL; 275 276 return ret; 277 } 278 279 /* Write out the relocs. */ 280 281 static void 282 elf64_sparc_write_relocs (bfd *abfd, asection *sec, void * data) 283 { 284 bfd_boolean *failedp = (bfd_boolean *) data; 285 Elf_Internal_Shdr *rela_hdr; 286 bfd_vma addr_offset; 287 Elf64_External_Rela *outbound_relocas, *src_rela; 288 unsigned int idx, count; 289 asymbol *last_sym = 0; 290 int last_sym_idx = 0; 291 292 /* If we have already failed, don't do anything. */ 293 if (*failedp) 294 return; 295 296 if ((sec->flags & SEC_RELOC) == 0) 297 return; 298 299 /* The linker backend writes the relocs out itself, and sets the 300 reloc_count field to zero to inhibit writing them here. Also, 301 sometimes the SEC_RELOC flag gets set even when there aren't any 302 relocs. */ 303 if (sec->reloc_count == 0) 304 return; 305 306 /* We can combine two relocs that refer to the same address 307 into R_SPARC_OLO10 if first one is R_SPARC_LO10 and the 308 latter is R_SPARC_13 with no associated symbol. */ 309 count = 0; 310 for (idx = 0; idx < sec->reloc_count; idx++) 311 { 312 bfd_vma addr; 313 314 ++count; 315 316 addr = sec->orelocation[idx]->address; 317 if (sec->orelocation[idx]->howto->type == R_SPARC_LO10 318 && idx < sec->reloc_count - 1) 319 { 320 arelent *r = sec->orelocation[idx + 1]; 321 322 if (r->howto->type == R_SPARC_13 323 && r->address == addr 324 && bfd_is_abs_section ((*r->sym_ptr_ptr)->section) 325 && (*r->sym_ptr_ptr)->value == 0) 326 ++idx; 327 } 328 } 329 330 rela_hdr = elf_section_data (sec)->rela.hdr; 331 332 rela_hdr->sh_size = rela_hdr->sh_entsize * count; 333 rela_hdr->contents = bfd_alloc (abfd, rela_hdr->sh_size); 334 if (rela_hdr->contents == NULL) 335 { 336 *failedp = TRUE; 337 return; 338 } 339 340 /* Figure out whether the relocations are RELA or REL relocations. */ 341 if (rela_hdr->sh_type != SHT_RELA) 342 abort (); 343 344 /* The address of an ELF reloc is section relative for an object 345 file, and absolute for an executable file or shared library. 346 The address of a BFD reloc is always section relative. */ 347 addr_offset = 0; 348 if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) 349 addr_offset = sec->vma; 350 351 /* orelocation has the data, reloc_count has the count... */ 352 outbound_relocas = (Elf64_External_Rela *) rela_hdr->contents; 353 src_rela = outbound_relocas; 354 355 for (idx = 0; idx < sec->reloc_count; idx++) 356 { 357 Elf_Internal_Rela dst_rela; 358 arelent *ptr; 359 asymbol *sym; 360 int n; 361 362 ptr = sec->orelocation[idx]; 363 sym = *ptr->sym_ptr_ptr; 364 if (sym == last_sym) 365 n = last_sym_idx; 366 else if (bfd_is_abs_section (sym->section) && sym->value == 0) 367 n = STN_UNDEF; 368 else 369 { 370 last_sym = sym; 371 n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym); 372 if (n < 0) 373 { 374 *failedp = TRUE; 375 return; 376 } 377 last_sym_idx = n; 378 } 379 380 if ((*ptr->sym_ptr_ptr)->the_bfd != NULL 381 && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec 382 && ! _bfd_elf_validate_reloc (abfd, ptr)) 383 { 384 *failedp = TRUE; 385 return; 386 } 387 388 if (ptr->howto->type == R_SPARC_LO10 389 && idx < sec->reloc_count - 1) 390 { 391 arelent *r = sec->orelocation[idx + 1]; 392 393 if (r->howto->type == R_SPARC_13 394 && r->address == ptr->address 395 && bfd_is_abs_section ((*r->sym_ptr_ptr)->section) 396 && (*r->sym_ptr_ptr)->value == 0) 397 { 398 idx++; 399 dst_rela.r_info 400 = ELF64_R_INFO (n, ELF64_R_TYPE_INFO (r->addend, 401 R_SPARC_OLO10)); 402 } 403 else 404 dst_rela.r_info = ELF64_R_INFO (n, R_SPARC_LO10); 405 } 406 else 407 dst_rela.r_info = ELF64_R_INFO (n, ptr->howto->type); 408 409 dst_rela.r_offset = ptr->address + addr_offset; 410 dst_rela.r_addend = ptr->addend; 411 412 bfd_elf64_swap_reloca_out (abfd, &dst_rela, (bfd_byte *) src_rela); 413 ++src_rela; 414 } 415 } 416 417 /* Hook called by the linker routine which adds symbols from an object 419 file. We use it for STT_REGISTER symbols. */ 420 421 static bfd_boolean 422 elf64_sparc_add_symbol_hook (bfd *abfd, struct bfd_link_info *info, 423 Elf_Internal_Sym *sym, const char **namep, 424 flagword *flagsp ATTRIBUTE_UNUSED, 425 asection **secp ATTRIBUTE_UNUSED, 426 bfd_vma *valp ATTRIBUTE_UNUSED) 427 { 428 static const char *const stt_types[] = { "NOTYPE", "OBJECT", "FUNCTION" }; 429 430 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC 431 && (abfd->flags & DYNAMIC) == 0 432 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) 433 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc; 434 435 if (ELF_ST_TYPE (sym->st_info) == STT_REGISTER) 436 { 437 int reg; 438 struct _bfd_sparc_elf_app_reg *p; 439 440 reg = (int)sym->st_value; 441 switch (reg & ~1) 442 { 443 case 2: reg -= 2; break; 444 case 6: reg -= 4; break; 445 default: 446 (*_bfd_error_handler) 447 (_("%B: Only registers %%g[2367] can be declared using STT_REGISTER"), 448 abfd); 449 return FALSE; 450 } 451 452 if (info->output_bfd->xvec != abfd->xvec 453 || (abfd->flags & DYNAMIC) != 0) 454 { 455 /* STT_REGISTER only works when linking an elf64_sparc object. 456 If STT_REGISTER comes from a dynamic object, don't put it into 457 the output bfd. The dynamic linker will recheck it. */ 458 *namep = NULL; 459 return TRUE; 460 } 461 462 p = _bfd_sparc_elf_hash_table(info)->app_regs + reg; 463 464 if (p->name != NULL && strcmp (p->name, *namep)) 465 { 466 (*_bfd_error_handler) 467 (_("Register %%g%d used incompatibly: %s in %B, previously %s in %B"), 468 abfd, p->abfd, (int) sym->st_value, 469 **namep ? *namep : "#scratch", 470 *p->name ? p->name : "#scratch"); 471 return FALSE; 472 } 473 474 if (p->name == NULL) 475 { 476 if (**namep) 477 { 478 struct elf_link_hash_entry *h; 479 480 h = (struct elf_link_hash_entry *) 481 bfd_link_hash_lookup (info->hash, *namep, FALSE, FALSE, FALSE); 482 483 if (h != NULL) 484 { 485 unsigned char type = h->type; 486 487 if (type > STT_FUNC) 488 type = 0; 489 (*_bfd_error_handler) 490 (_("Symbol `%s' has differing types: REGISTER in %B, previously %s in %B"), 491 abfd, p->abfd, *namep, stt_types[type]); 492 return FALSE; 493 } 494 495 p->name = bfd_hash_allocate (&info->hash->table, 496 strlen (*namep) + 1); 497 if (!p->name) 498 return FALSE; 499 500 strcpy (p->name, *namep); 501 } 502 else 503 p->name = ""; 504 p->bind = ELF_ST_BIND (sym->st_info); 505 p->abfd = abfd; 506 p->shndx = sym->st_shndx; 507 } 508 else 509 { 510 if (p->bind == STB_WEAK 511 && ELF_ST_BIND (sym->st_info) == STB_GLOBAL) 512 { 513 p->bind = STB_GLOBAL; 514 p->abfd = abfd; 515 } 516 } 517 *namep = NULL; 518 return TRUE; 519 } 520 else if (*namep && **namep 521 && info->output_bfd->xvec == abfd->xvec) 522 { 523 int i; 524 struct _bfd_sparc_elf_app_reg *p; 525 526 p = _bfd_sparc_elf_hash_table(info)->app_regs; 527 for (i = 0; i < 4; i++, p++) 528 if (p->name != NULL && ! strcmp (p->name, *namep)) 529 { 530 unsigned char type = ELF_ST_TYPE (sym->st_info); 531 532 if (type > STT_FUNC) 533 type = 0; 534 (*_bfd_error_handler) 535 (_("Symbol `%s' has differing types: %s in %B, previously REGISTER in %B"), 536 abfd, p->abfd, *namep, stt_types[type]); 537 return FALSE; 538 } 539 } 540 return TRUE; 541 } 542 543 /* This function takes care of emitting STT_REGISTER symbols 544 which we cannot easily keep in the symbol hash table. */ 545 546 static bfd_boolean 547 elf64_sparc_output_arch_syms (bfd *output_bfd ATTRIBUTE_UNUSED, 548 struct bfd_link_info *info, 549 void * flaginfo, 550 int (*func) (void *, const char *, 551 Elf_Internal_Sym *, 552 asection *, 553 struct elf_link_hash_entry *)) 554 { 555 int reg; 556 struct _bfd_sparc_elf_app_reg *app_regs = 557 _bfd_sparc_elf_hash_table(info)->app_regs; 558 Elf_Internal_Sym sym; 559 560 /* We arranged in size_dynamic_sections to put the STT_REGISTER entries 561 at the end of the dynlocal list, so they came at the end of the local 562 symbols in the symtab. Except that they aren't STB_LOCAL, so we need 563 to back up symtab->sh_info. */ 564 if (elf_hash_table (info)->dynlocal) 565 { 566 bfd * dynobj = elf_hash_table (info)->dynobj; 567 asection *dynsymsec = bfd_get_linker_section (dynobj, ".dynsym"); 568 struct elf_link_local_dynamic_entry *e; 569 570 for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) 571 if (e->input_indx == -1) 572 break; 573 if (e) 574 { 575 elf_section_data (dynsymsec->output_section)->this_hdr.sh_info 576 = e->dynindx; 577 } 578 } 579 580 if (info->strip == strip_all) 581 return TRUE; 582 583 for (reg = 0; reg < 4; reg++) 584 if (app_regs [reg].name != NULL) 585 { 586 if (info->strip == strip_some 587 && bfd_hash_lookup (info->keep_hash, 588 app_regs [reg].name, 589 FALSE, FALSE) == NULL) 590 continue; 591 592 sym.st_value = reg < 2 ? reg + 2 : reg + 4; 593 sym.st_size = 0; 594 sym.st_other = 0; 595 sym.st_info = ELF_ST_INFO (app_regs [reg].bind, STT_REGISTER); 596 sym.st_shndx = app_regs [reg].shndx; 597 sym.st_target_internal = 0; 598 if ((*func) (flaginfo, app_regs [reg].name, &sym, 599 sym.st_shndx == SHN_ABS 600 ? bfd_abs_section_ptr : bfd_und_section_ptr, 601 NULL) != 1) 602 return FALSE; 603 } 604 605 return TRUE; 606 } 607 608 static int 609 elf64_sparc_get_symbol_type (Elf_Internal_Sym *elf_sym, int type) 610 { 611 if (ELF_ST_TYPE (elf_sym->st_info) == STT_REGISTER) 612 return STT_REGISTER; 613 else 614 return type; 615 } 616 617 /* A STB_GLOBAL,STT_REGISTER symbol should be BSF_GLOBAL 618 even in SHN_UNDEF section. */ 619 620 static void 621 elf64_sparc_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *asym) 622 { 623 elf_symbol_type *elfsym; 624 625 elfsym = (elf_symbol_type *) asym; 626 if (elfsym->internal_elf_sym.st_info 627 == ELF_ST_INFO (STB_GLOBAL, STT_REGISTER)) 628 { 629 asym->flags |= BSF_GLOBAL; 630 } 631 } 632 633 634 /* Functions for dealing with the e_flags field. */ 636 637 /* Merge backend specific data from an object file to the output 638 object file when linking. */ 639 640 static bfd_boolean 641 elf64_sparc_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 642 { 643 bfd_boolean error; 644 flagword new_flags, old_flags; 645 int new_mm, old_mm; 646 647 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 648 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 649 return TRUE; 650 651 new_flags = elf_elfheader (ibfd)->e_flags; 652 old_flags = elf_elfheader (obfd)->e_flags; 653 654 if (!elf_flags_init (obfd)) /* First call, no flags set */ 655 { 656 elf_flags_init (obfd) = TRUE; 657 elf_elfheader (obfd)->e_flags = new_flags; 658 } 659 660 else if (new_flags == old_flags) /* Compatible flags are ok */ 661 ; 662 663 else /* Incompatible flags */ 664 { 665 error = FALSE; 666 667 #define EF_SPARC_ISA_EXTENSIONS \ 668 (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3 | EF_SPARC_HAL_R1) 669 670 if ((ibfd->flags & DYNAMIC) != 0) 671 { 672 /* We don't want dynamic objects memory ordering and 673 architecture to have any role. That's what dynamic linker 674 should do. */ 675 new_flags &= ~(EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS); 676 new_flags |= (old_flags 677 & (EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS)); 678 } 679 else 680 { 681 /* Choose the highest architecture requirements. */ 682 old_flags |= (new_flags & EF_SPARC_ISA_EXTENSIONS); 683 new_flags |= (old_flags & EF_SPARC_ISA_EXTENSIONS); 684 if ((old_flags & (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3)) 685 && (old_flags & EF_SPARC_HAL_R1)) 686 { 687 error = TRUE; 688 (*_bfd_error_handler) 689 (_("%B: linking UltraSPARC specific with HAL specific code"), 690 ibfd); 691 } 692 /* Choose the most restrictive memory ordering. */ 693 old_mm = (old_flags & EF_SPARCV9_MM); 694 new_mm = (new_flags & EF_SPARCV9_MM); 695 old_flags &= ~EF_SPARCV9_MM; 696 new_flags &= ~EF_SPARCV9_MM; 697 if (new_mm < old_mm) 698 old_mm = new_mm; 699 old_flags |= old_mm; 700 new_flags |= old_mm; 701 } 702 703 /* Warn about any other mismatches */ 704 if (new_flags != old_flags) 705 { 706 error = TRUE; 707 (*_bfd_error_handler) 708 (_("%B: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), 709 ibfd, (long) new_flags, (long) old_flags); 710 } 711 712 elf_elfheader (obfd)->e_flags = old_flags; 713 714 if (error) 715 { 716 bfd_set_error (bfd_error_bad_value); 717 return FALSE; 718 } 719 } 720 return _bfd_sparc_elf_merge_private_bfd_data (ibfd, obfd); 721 } 722 723 /* MARCO: Set the correct entry size for the .stab section. */ 724 725 static bfd_boolean 726 elf64_sparc_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, 727 Elf_Internal_Shdr *hdr ATTRIBUTE_UNUSED, 728 asection *sec) 729 { 730 const char *name; 731 732 name = bfd_get_section_name (abfd, sec); 733 734 if (strcmp (name, ".stab") == 0) 735 { 736 /* Even in the 64bit case the stab entries are only 12 bytes long. */ 737 elf_section_data (sec)->this_hdr.sh_entsize = 12; 738 } 739 740 return TRUE; 741 } 742 743 /* Print a STT_REGISTER symbol to file FILE. */ 745 746 static const char * 747 elf64_sparc_print_symbol_all (bfd *abfd ATTRIBUTE_UNUSED, void * filep, 748 asymbol *symbol) 749 { 750 FILE *file = (FILE *) filep; 751 int reg, type; 752 753 if (ELF_ST_TYPE (((elf_symbol_type *) symbol)->internal_elf_sym.st_info) 754 != STT_REGISTER) 755 return NULL; 756 757 reg = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value; 758 type = symbol->flags; 759 fprintf (file, "REG_%c%c%11s%c%c R", "GOLI" [reg / 8], '0' + (reg & 7), "", 760 ((type & BSF_LOCAL) 761 ? (type & BSF_GLOBAL) ? '!' : 'l' 762 : (type & BSF_GLOBAL) ? 'g' : ' '), 763 (type & BSF_WEAK) ? 'w' : ' '); 764 if (symbol->name == NULL || symbol->name [0] == '\0') 765 return "#scratch"; 766 else 767 return symbol->name; 768 } 769 770 static enum elf_reloc_type_class 772 elf64_sparc_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 773 const asection *rel_sec ATTRIBUTE_UNUSED, 774 const Elf_Internal_Rela *rela) 775 { 776 switch ((int) ELF64_R_TYPE (rela->r_info)) 777 { 778 case R_SPARC_RELATIVE: 779 return reloc_class_relative; 780 case R_SPARC_JMP_SLOT: 781 return reloc_class_plt; 782 case R_SPARC_COPY: 783 return reloc_class_copy; 784 default: 785 return reloc_class_normal; 786 } 787 } 788 789 /* Relocations in the 64 bit SPARC ELF ABI are more complex than in 790 standard ELF, because R_SPARC_OLO10 has secondary addend in 791 ELF64_R_TYPE_DATA field. This structure is used to redirect the 792 relocation handling routines. */ 793 794 const struct elf_size_info elf64_sparc_size_info = 795 { 796 sizeof (Elf64_External_Ehdr), 797 sizeof (Elf64_External_Phdr), 798 sizeof (Elf64_External_Shdr), 799 sizeof (Elf64_External_Rel), 800 sizeof (Elf64_External_Rela), 801 sizeof (Elf64_External_Sym), 802 sizeof (Elf64_External_Dyn), 803 sizeof (Elf_External_Note), 804 4, /* hash-table entry size. */ 805 /* Internal relocations per external relocations. 806 For link purposes we use just 1 internal per 807 1 external, for assembly and slurp symbol table 808 we use 2. */ 809 1, 810 64, /* arch_size. */ 811 3, /* log_file_align. */ 812 ELFCLASS64, 813 EV_CURRENT, 814 bfd_elf64_write_out_phdrs, 815 bfd_elf64_write_shdrs_and_ehdr, 816 bfd_elf64_checksum_contents, 817 elf64_sparc_write_relocs, 818 bfd_elf64_swap_symbol_in, 819 bfd_elf64_swap_symbol_out, 820 elf64_sparc_slurp_reloc_table, 821 bfd_elf64_slurp_symbol_table, 822 bfd_elf64_swap_dyn_in, 823 bfd_elf64_swap_dyn_out, 824 bfd_elf64_swap_reloc_in, 825 bfd_elf64_swap_reloc_out, 826 bfd_elf64_swap_reloca_in, 827 bfd_elf64_swap_reloca_out 828 }; 829 830 #define TARGET_BIG_SYM sparc_elf64_vec 831 #define TARGET_BIG_NAME "elf64-sparc" 832 #define ELF_ARCH bfd_arch_sparc 833 #define ELF_MAXPAGESIZE 0x100000 834 #define ELF_COMMONPAGESIZE 0x2000 835 836 /* This is the official ABI value. */ 837 #define ELF_MACHINE_CODE EM_SPARCV9 838 839 /* This is the value that we used before the ABI was released. */ 840 #define ELF_MACHINE_ALT1 EM_OLD_SPARCV9 841 842 #define elf_backend_reloc_type_class \ 843 elf64_sparc_reloc_type_class 844 #define bfd_elf64_get_reloc_upper_bound \ 845 elf64_sparc_get_reloc_upper_bound 846 #define bfd_elf64_get_dynamic_reloc_upper_bound \ 847 elf64_sparc_get_dynamic_reloc_upper_bound 848 #define bfd_elf64_canonicalize_reloc \ 849 elf64_sparc_canonicalize_reloc 850 #define bfd_elf64_canonicalize_dynamic_reloc \ 851 elf64_sparc_canonicalize_dynamic_reloc 852 #define elf_backend_add_symbol_hook \ 853 elf64_sparc_add_symbol_hook 854 #define elf_backend_get_symbol_type \ 855 elf64_sparc_get_symbol_type 856 #define elf_backend_symbol_processing \ 857 elf64_sparc_symbol_processing 858 #define elf_backend_print_symbol_all \ 859 elf64_sparc_print_symbol_all 860 #define elf_backend_output_arch_syms \ 861 elf64_sparc_output_arch_syms 862 #define bfd_elf64_bfd_merge_private_bfd_data \ 863 elf64_sparc_merge_private_bfd_data 864 #define elf_backend_fake_sections \ 865 elf64_sparc_fake_sections 866 #define elf_backend_size_info \ 867 elf64_sparc_size_info 868 869 #define elf_backend_plt_sym_val \ 870 _bfd_sparc_elf_plt_sym_val 871 #define bfd_elf64_bfd_link_hash_table_create \ 872 _bfd_sparc_elf_link_hash_table_create 873 #define elf_info_to_howto \ 874 _bfd_sparc_elf_info_to_howto 875 #define elf_backend_copy_indirect_symbol \ 876 _bfd_sparc_elf_copy_indirect_symbol 877 #define bfd_elf64_bfd_reloc_type_lookup \ 878 _bfd_sparc_elf_reloc_type_lookup 879 #define bfd_elf64_bfd_reloc_name_lookup \ 880 _bfd_sparc_elf_reloc_name_lookup 881 #define bfd_elf64_bfd_relax_section \ 882 _bfd_sparc_elf_relax_section 883 #define bfd_elf64_new_section_hook \ 884 _bfd_sparc_elf_new_section_hook 885 886 #define elf_backend_create_dynamic_sections \ 887 _bfd_sparc_elf_create_dynamic_sections 888 #define elf_backend_relocs_compatible \ 889 _bfd_elf_relocs_compatible 890 #define elf_backend_check_relocs \ 891 _bfd_sparc_elf_check_relocs 892 #define elf_backend_adjust_dynamic_symbol \ 893 _bfd_sparc_elf_adjust_dynamic_symbol 894 #define elf_backend_omit_section_dynsym \ 895 _bfd_sparc_elf_omit_section_dynsym 896 #define elf_backend_size_dynamic_sections \ 897 _bfd_sparc_elf_size_dynamic_sections 898 #define elf_backend_relocate_section \ 899 _bfd_sparc_elf_relocate_section 900 #define elf_backend_finish_dynamic_symbol \ 901 _bfd_sparc_elf_finish_dynamic_symbol 902 #define elf_backend_finish_dynamic_sections \ 903 _bfd_sparc_elf_finish_dynamic_sections 904 905 #define bfd_elf64_mkobject \ 906 _bfd_sparc_elf_mkobject 907 #define elf_backend_object_p \ 908 _bfd_sparc_elf_object_p 909 #define elf_backend_gc_mark_hook \ 910 _bfd_sparc_elf_gc_mark_hook 911 #define elf_backend_gc_sweep_hook \ 912 _bfd_sparc_elf_gc_sweep_hook 913 #define elf_backend_init_index_section \ 914 _bfd_elf_init_1_index_section 915 916 #define elf_backend_can_gc_sections 1 917 #define elf_backend_can_refcount 1 918 #define elf_backend_want_got_plt 0 919 #define elf_backend_plt_readonly 0 920 #define elf_backend_want_plt_sym 1 921 #define elf_backend_got_header_size 8 922 #define elf_backend_rela_normal 1 923 924 /* Section 5.2.4 of the ABI specifies a 256-byte boundary for the table. */ 925 #define elf_backend_plt_alignment 8 926 927 #include "elf64-target.h" 928 929 /* FreeBSD support */ 930 #undef TARGET_BIG_SYM 931 #define TARGET_BIG_SYM sparc_elf64_fbsd_vec 932 #undef TARGET_BIG_NAME 933 #define TARGET_BIG_NAME "elf64-sparc-freebsd" 934 #undef ELF_OSABI 935 #define ELF_OSABI ELFOSABI_FREEBSD 936 937 #undef elf64_bed 938 #define elf64_bed elf64_sparc_fbsd_bed 939 940 #include "elf64-target.h" 941 942 /* Solaris 2. */ 943 944 #undef TARGET_BIG_SYM 945 #define TARGET_BIG_SYM sparc_elf64_sol2_vec 946 #undef TARGET_BIG_NAME 947 #define TARGET_BIG_NAME "elf64-sparc-sol2" 948 949 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE 950 objects won't be recognized. */ 951 #undef ELF_OSABI 952 953 #undef elf64_bed 954 #define elf64_bed elf64_sparc_sol2_bed 955 956 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte 957 boundary. */ 958 #undef elf_backend_static_tls_alignment 959 #define elf_backend_static_tls_alignment 16 960 961 #include "elf64-target.h" 962
