| 1 | /* SPARC-specific support for 64-bit ELF |
| 2 | Copyright (C) 1993-2019 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 <limits.h> |
| 23 | #include "bfd.h" |
| 24 | #include "libbfd.h" |
| 25 | #include "elf-bfd.h" |
| 26 | #include "elf/sparc.h" |
| 27 | #include "opcode/sparc.h" |
| 28 | #include "elfxx-sparc.h" |
| 29 | |
| 30 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
| 31 | #define MINUS_ONE (~ (bfd_vma) 0) |
| 32 | |
| 33 | /* Due to the way how we handle R_SPARC_OLO10, each entry in a SHT_RELA |
| 34 | section can represent up to two relocs, we must tell the user to allocate |
| 35 | more space. */ |
| 36 | |
| 37 | static long |
| 38 | elf64_sparc_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) |
| 39 | { |
| 40 | #if SIZEOF_LONG == SIZEOF_INT |
| 41 | if (sec->reloc_count >= LONG_MAX / 2 / sizeof (arelent *)) |
| 42 | { |
| 43 | bfd_set_error (bfd_error_file_too_big); |
| 44 | return -1; |
| 45 | } |
| 46 | #endif |
| 47 | return (sec->reloc_count * 2 + 1) * sizeof (arelent *); |
| 48 | } |
| 49 | |
| 50 | static long |
| 51 | elf64_sparc_get_dynamic_reloc_upper_bound (bfd *abfd) |
| 52 | { |
| 53 | long ret = _bfd_elf_get_dynamic_reloc_upper_bound (abfd); |
| 54 | if (ret > LONG_MAX / 2) |
| 55 | { |
| 56 | bfd_set_error (bfd_error_file_too_big); |
| 57 | ret = -1; |
| 58 | } |
| 59 | else if (ret > 0) |
| 60 | ret *= 2; |
| 61 | return ret; |
| 62 | } |
| 63 | |
| 64 | /* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of |
| 65 | them. We cannot use generic elf routines for this, because R_SPARC_OLO10 |
| 66 | has secondary addend in ELF64_R_TYPE_DATA. We handle it as two relocations |
| 67 | for the same location, R_SPARC_LO10 and R_SPARC_13. */ |
| 68 | |
| 69 | static bfd_boolean |
| 70 | elf64_sparc_slurp_one_reloc_table (bfd *abfd, asection *asect, |
| 71 | Elf_Internal_Shdr *rel_hdr, |
| 72 | asymbol **symbols, bfd_boolean dynamic) |
| 73 | { |
| 74 | void * allocated = NULL; |
| 75 | bfd_byte *native_relocs; |
| 76 | arelent *relent; |
| 77 | unsigned int i; |
| 78 | int entsize; |
| 79 | bfd_size_type count; |
| 80 | arelent *relents; |
| 81 | |
| 82 | allocated = bfd_malloc (rel_hdr->sh_size); |
| 83 | if (allocated == NULL) |
| 84 | goto error_return; |
| 85 | |
| 86 | if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0 |
| 87 | || bfd_bread (allocated, rel_hdr->sh_size, abfd) != rel_hdr->sh_size) |
| 88 | goto error_return; |
| 89 | |
| 90 | native_relocs = (bfd_byte *) allocated; |
| 91 | |
| 92 | relents = asect->relocation + canon_reloc_count (asect); |
| 93 | |
| 94 | entsize = rel_hdr->sh_entsize; |
| 95 | BFD_ASSERT (entsize == sizeof (Elf64_External_Rela)); |
| 96 | |
| 97 | count = rel_hdr->sh_size / entsize; |
| 98 | |
| 99 | for (i = 0, relent = relents; i < count; |
| 100 | i++, relent++, native_relocs += entsize) |
| 101 | { |
| 102 | Elf_Internal_Rela rela; |
| 103 | unsigned int r_type; |
| 104 | |
| 105 | bfd_elf64_swap_reloca_in (abfd, native_relocs, &rela); |
| 106 | |
| 107 | /* The address of an ELF reloc is section relative for an object |
| 108 | file, and absolute for an executable file or shared library. |
| 109 | The address of a normal BFD reloc is always section relative, |
| 110 | and the address of a dynamic reloc is absolute.. */ |
| 111 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic) |
| 112 | relent->address = rela.r_offset; |
| 113 | else |
| 114 | relent->address = rela.r_offset - asect->vma; |
| 115 | |
| 116 | if (ELF64_R_SYM (rela.r_info) == STN_UNDEF) |
| 117 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| 118 | else if (/* PR 17512: file: 996185f8. */ |
| 119 | ELF64_R_SYM (rela.r_info) > (dynamic |
| 120 | ? bfd_get_dynamic_symcount (abfd) |
| 121 | : bfd_get_symcount (abfd))) |
| 122 | { |
| 123 | _bfd_error_handler |
| 124 | /* xgettext:c-format */ |
| 125 | (_("%pB(%pA): relocation %d has invalid symbol index %ld"), |
| 126 | abfd, asect, i, (long) ELF64_R_SYM (rela.r_info)); |
| 127 | bfd_set_error (bfd_error_bad_value); |
| 128 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| 129 | } |
| 130 | else |
| 131 | { |
| 132 | asymbol **ps, *s; |
| 133 | |
| 134 | ps = symbols + ELF64_R_SYM (rela.r_info) - 1; |
| 135 | s = *ps; |
| 136 | |
| 137 | /* Canonicalize ELF section symbols. FIXME: Why? */ |
| 138 | if ((s->flags & BSF_SECTION_SYM) == 0) |
| 139 | relent->sym_ptr_ptr = ps; |
| 140 | else |
| 141 | relent->sym_ptr_ptr = s->section->symbol_ptr_ptr; |
| 142 | } |
| 143 | |
| 144 | relent->addend = rela.r_addend; |
| 145 | |
| 146 | r_type = ELF64_R_TYPE_ID (rela.r_info); |
| 147 | if (r_type == R_SPARC_OLO10) |
| 148 | { |
| 149 | relent->howto = _bfd_sparc_elf_info_to_howto_ptr (abfd, R_SPARC_LO10); |
| 150 | relent[1].address = relent->address; |
| 151 | relent++; |
| 152 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| 153 | relent->addend = ELF64_R_TYPE_DATA (rela.r_info); |
| 154 | relent->howto = _bfd_sparc_elf_info_to_howto_ptr (abfd, R_SPARC_13); |
| 155 | } |
| 156 | else |
| 157 | { |
| 158 | relent->howto = _bfd_sparc_elf_info_to_howto_ptr (abfd, r_type); |
| 159 | if (relent->howto == NULL) |
| 160 | goto error_return; |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | canon_reloc_count (asect) += relent - relents; |
| 165 | |
| 166 | if (allocated != NULL) |
| 167 | free (allocated); |
| 168 | |
| 169 | return TRUE; |
| 170 | |
| 171 | error_return: |
| 172 | if (allocated != NULL) |
| 173 | free (allocated); |
| 174 | return FALSE; |
| 175 | } |
| 176 | |
| 177 | /* Read in and swap the external relocs. */ |
| 178 | |
| 179 | static bfd_boolean |
| 180 | elf64_sparc_slurp_reloc_table (bfd *abfd, asection *asect, |
| 181 | asymbol **symbols, bfd_boolean dynamic) |
| 182 | { |
| 183 | struct bfd_elf_section_data * const d = elf_section_data (asect); |
| 184 | Elf_Internal_Shdr *rel_hdr; |
| 185 | Elf_Internal_Shdr *rel_hdr2; |
| 186 | bfd_size_type amt; |
| 187 | |
| 188 | if (asect->relocation != NULL) |
| 189 | return TRUE; |
| 190 | |
| 191 | if (! dynamic) |
| 192 | { |
| 193 | if ((asect->flags & SEC_RELOC) == 0 |
| 194 | || asect->reloc_count == 0) |
| 195 | return TRUE; |
| 196 | |
| 197 | rel_hdr = d->rel.hdr; |
| 198 | rel_hdr2 = d->rela.hdr; |
| 199 | |
| 200 | BFD_ASSERT ((rel_hdr && asect->rel_filepos == rel_hdr->sh_offset) |
| 201 | || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset)); |
| 202 | } |
| 203 | else |
| 204 | { |
| 205 | /* Note that ASECT->RELOC_COUNT tends not to be accurate in this |
| 206 | case because relocations against this section may use the |
| 207 | dynamic symbol table, and in that case bfd_section_from_shdr |
| 208 | in elf.c does not update the RELOC_COUNT. */ |
| 209 | if (asect->size == 0) |
| 210 | return TRUE; |
| 211 | |
| 212 | rel_hdr = &d->this_hdr; |
| 213 | asect->reloc_count = NUM_SHDR_ENTRIES (rel_hdr); |
| 214 | rel_hdr2 = NULL; |
| 215 | } |
| 216 | |
| 217 | amt = asect->reloc_count; |
| 218 | amt *= 2 * sizeof (arelent); |
| 219 | asect->relocation = (arelent *) bfd_alloc (abfd, amt); |
| 220 | if (asect->relocation == NULL) |
| 221 | return FALSE; |
| 222 | |
| 223 | /* The elf64_sparc_slurp_one_reloc_table routine increments |
| 224 | canon_reloc_count. */ |
| 225 | canon_reloc_count (asect) = 0; |
| 226 | |
| 227 | if (rel_hdr |
| 228 | && !elf64_sparc_slurp_one_reloc_table (abfd, asect, rel_hdr, symbols, |
| 229 | dynamic)) |
| 230 | return FALSE; |
| 231 | |
| 232 | if (rel_hdr2 |
| 233 | && !elf64_sparc_slurp_one_reloc_table (abfd, asect, rel_hdr2, symbols, |
| 234 | dynamic)) |
| 235 | return FALSE; |
| 236 | |
| 237 | return TRUE; |
| 238 | } |
| 239 | |
| 240 | /* Canonicalize the relocs. */ |
| 241 | |
| 242 | static long |
| 243 | elf64_sparc_canonicalize_reloc (bfd *abfd, sec_ptr section, |
| 244 | arelent **relptr, asymbol **symbols) |
| 245 | { |
| 246 | arelent *tblptr; |
| 247 | unsigned int i; |
| 248 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 249 | |
| 250 | if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE)) |
| 251 | return -1; |
| 252 | |
| 253 | tblptr = section->relocation; |
| 254 | for (i = 0; i < canon_reloc_count (section); i++) |
| 255 | *relptr++ = tblptr++; |
| 256 | |
| 257 | *relptr = NULL; |
| 258 | |
| 259 | return canon_reloc_count (section); |
| 260 | } |
| 261 | |
| 262 | |
| 263 | /* Canonicalize the dynamic relocation entries. Note that we return |
| 264 | the dynamic relocations as a single block, although they are |
| 265 | actually associated with particular sections; the interface, which |
| 266 | was designed for SunOS style shared libraries, expects that there |
| 267 | is only one set of dynamic relocs. Any section that was actually |
| 268 | installed in the BFD, and has type SHT_REL or SHT_RELA, and uses |
| 269 | the dynamic symbol table, is considered to be a dynamic reloc |
| 270 | section. */ |
| 271 | |
| 272 | static long |
| 273 | elf64_sparc_canonicalize_dynamic_reloc (bfd *abfd, arelent **storage, |
| 274 | asymbol **syms) |
| 275 | { |
| 276 | asection *s; |
| 277 | long ret; |
| 278 | |
| 279 | if (elf_dynsymtab (abfd) == 0) |
| 280 | { |
| 281 | bfd_set_error (bfd_error_invalid_operation); |
| 282 | return -1; |
| 283 | } |
| 284 | |
| 285 | ret = 0; |
| 286 | for (s = abfd->sections; s != NULL; s = s->next) |
| 287 | { |
| 288 | if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd) |
| 289 | && (elf_section_data (s)->this_hdr.sh_type == SHT_RELA)) |
| 290 | { |
| 291 | arelent *p; |
| 292 | long count, i; |
| 293 | |
| 294 | if (! elf64_sparc_slurp_reloc_table (abfd, s, syms, TRUE)) |
| 295 | return -1; |
| 296 | count = canon_reloc_count (s); |
| 297 | p = s->relocation; |
| 298 | for (i = 0; i < count; i++) |
| 299 | *storage++ = p++; |
| 300 | ret += count; |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | *storage = NULL; |
| 305 | |
| 306 | return ret; |
| 307 | } |
| 308 | |
| 309 | /* Install a new set of internal relocs. */ |
| 310 | |
| 311 | static void |
| 312 | elf64_sparc_set_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| 313 | asection *asect, |
| 314 | arelent **location, |
| 315 | unsigned int count) |
| 316 | { |
| 317 | asect->orelocation = location; |
| 318 | canon_reloc_count (asect) = count; |
| 319 | } |
| 320 | |
| 321 | /* Write out the relocs. */ |
| 322 | |
| 323 | static void |
| 324 | elf64_sparc_write_relocs (bfd *abfd, asection *sec, void * data) |
| 325 | { |
| 326 | bfd_boolean *failedp = (bfd_boolean *) data; |
| 327 | Elf_Internal_Shdr *rela_hdr; |
| 328 | bfd_vma addr_offset; |
| 329 | Elf64_External_Rela *outbound_relocas, *src_rela; |
| 330 | unsigned int idx, count; |
| 331 | asymbol *last_sym = 0; |
| 332 | int last_sym_idx = 0; |
| 333 | |
| 334 | /* If we have already failed, don't do anything. */ |
| 335 | if (*failedp) |
| 336 | return; |
| 337 | |
| 338 | if ((sec->flags & SEC_RELOC) == 0) |
| 339 | return; |
| 340 | |
| 341 | /* The linker backend writes the relocs out itself, and sets the |
| 342 | reloc_count field to zero to inhibit writing them here. Also, |
| 343 | sometimes the SEC_RELOC flag gets set even when there aren't any |
| 344 | relocs. */ |
| 345 | if (canon_reloc_count (sec) == 0) |
| 346 | return; |
| 347 | |
| 348 | /* We can combine two relocs that refer to the same address |
| 349 | into R_SPARC_OLO10 if first one is R_SPARC_LO10 and the |
| 350 | latter is R_SPARC_13 with no associated symbol. */ |
| 351 | count = 0; |
| 352 | for (idx = 0; idx < canon_reloc_count (sec); idx++) |
| 353 | { |
| 354 | bfd_vma addr; |
| 355 | |
| 356 | ++count; |
| 357 | |
| 358 | addr = sec->orelocation[idx]->address; |
| 359 | if (sec->orelocation[idx]->howto->type == R_SPARC_LO10 |
| 360 | && idx < canon_reloc_count (sec) - 1) |
| 361 | { |
| 362 | arelent *r = sec->orelocation[idx + 1]; |
| 363 | |
| 364 | if (r->howto->type == R_SPARC_13 |
| 365 | && r->address == addr |
| 366 | && bfd_is_abs_section ((*r->sym_ptr_ptr)->section) |
| 367 | && (*r->sym_ptr_ptr)->value == 0) |
| 368 | ++idx; |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | rela_hdr = elf_section_data (sec)->rela.hdr; |
| 373 | |
| 374 | rela_hdr->sh_size = rela_hdr->sh_entsize * count; |
| 375 | rela_hdr->contents = bfd_alloc (abfd, rela_hdr->sh_size); |
| 376 | if (rela_hdr->contents == NULL) |
| 377 | { |
| 378 | *failedp = TRUE; |
| 379 | return; |
| 380 | } |
| 381 | |
| 382 | /* Figure out whether the relocations are RELA or REL relocations. */ |
| 383 | if (rela_hdr->sh_type != SHT_RELA) |
| 384 | abort (); |
| 385 | |
| 386 | /* The address of an ELF reloc is section relative for an object |
| 387 | file, and absolute for an executable file or shared library. |
| 388 | The address of a BFD reloc is always section relative. */ |
| 389 | addr_offset = 0; |
| 390 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
| 391 | addr_offset = sec->vma; |
| 392 | |
| 393 | /* orelocation has the data, reloc_count has the count... */ |
| 394 | outbound_relocas = (Elf64_External_Rela *) rela_hdr->contents; |
| 395 | src_rela = outbound_relocas; |
| 396 | |
| 397 | for (idx = 0; idx < canon_reloc_count (sec); idx++) |
| 398 | { |
| 399 | Elf_Internal_Rela dst_rela; |
| 400 | arelent *ptr; |
| 401 | asymbol *sym; |
| 402 | int n; |
| 403 | |
| 404 | ptr = sec->orelocation[idx]; |
| 405 | sym = *ptr->sym_ptr_ptr; |
| 406 | if (sym == last_sym) |
| 407 | n = last_sym_idx; |
| 408 | else if (bfd_is_abs_section (sym->section) && sym->value == 0) |
| 409 | n = STN_UNDEF; |
| 410 | else |
| 411 | { |
| 412 | last_sym = sym; |
| 413 | n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym); |
| 414 | if (n < 0) |
| 415 | { |
| 416 | *failedp = TRUE; |
| 417 | return; |
| 418 | } |
| 419 | last_sym_idx = n; |
| 420 | } |
| 421 | |
| 422 | if ((*ptr->sym_ptr_ptr)->the_bfd != NULL |
| 423 | && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec |
| 424 | && ! _bfd_elf_validate_reloc (abfd, ptr)) |
| 425 | { |
| 426 | *failedp = TRUE; |
| 427 | return; |
| 428 | } |
| 429 | |
| 430 | if (ptr->howto->type == R_SPARC_LO10 |
| 431 | && idx < canon_reloc_count (sec) - 1) |
| 432 | { |
| 433 | arelent *r = sec->orelocation[idx + 1]; |
| 434 | |
| 435 | if (r->howto->type == R_SPARC_13 |
| 436 | && r->address == ptr->address |
| 437 | && bfd_is_abs_section ((*r->sym_ptr_ptr)->section) |
| 438 | && (*r->sym_ptr_ptr)->value == 0) |
| 439 | { |
| 440 | idx++; |
| 441 | dst_rela.r_info |
| 442 | = ELF64_R_INFO (n, ELF64_R_TYPE_INFO (r->addend, |
| 443 | R_SPARC_OLO10)); |
| 444 | } |
| 445 | else |
| 446 | dst_rela.r_info = ELF64_R_INFO (n, R_SPARC_LO10); |
| 447 | } |
| 448 | else |
| 449 | dst_rela.r_info = ELF64_R_INFO (n, ptr->howto->type); |
| 450 | |
| 451 | dst_rela.r_offset = ptr->address + addr_offset; |
| 452 | dst_rela.r_addend = ptr->addend; |
| 453 | |
| 454 | bfd_elf64_swap_reloca_out (abfd, &dst_rela, (bfd_byte *) src_rela); |
| 455 | ++src_rela; |
| 456 | } |
| 457 | } |
| 458 | \f |
| 459 | /* Hook called by the linker routine which adds symbols from an object |
| 460 | file. We use it for STT_REGISTER symbols. */ |
| 461 | |
| 462 | static bfd_boolean |
| 463 | elf64_sparc_add_symbol_hook (bfd *abfd, struct bfd_link_info *info, |
| 464 | Elf_Internal_Sym *sym, const char **namep, |
| 465 | flagword *flagsp ATTRIBUTE_UNUSED, |
| 466 | asection **secp ATTRIBUTE_UNUSED, |
| 467 | bfd_vma *valp ATTRIBUTE_UNUSED) |
| 468 | { |
| 469 | static const char *const stt_types[] = { "NOTYPE", "OBJECT", "FUNCTION" }; |
| 470 | |
| 471 | if (ELF_ST_TYPE (sym->st_info) == STT_REGISTER) |
| 472 | { |
| 473 | int reg; |
| 474 | struct _bfd_sparc_elf_app_reg *p; |
| 475 | |
| 476 | reg = (int)sym->st_value; |
| 477 | switch (reg & ~1) |
| 478 | { |
| 479 | case 2: reg -= 2; break; |
| 480 | case 6: reg -= 4; break; |
| 481 | default: |
| 482 | _bfd_error_handler |
| 483 | (_("%pB: only registers %%g[2367] can be declared using STT_REGISTER"), |
| 484 | abfd); |
| 485 | return FALSE; |
| 486 | } |
| 487 | |
| 488 | if (info->output_bfd->xvec != abfd->xvec |
| 489 | || (abfd->flags & DYNAMIC) != 0) |
| 490 | { |
| 491 | /* STT_REGISTER only works when linking an elf64_sparc object. |
| 492 | If STT_REGISTER comes from a dynamic object, don't put it into |
| 493 | the output bfd. The dynamic linker will recheck it. */ |
| 494 | *namep = NULL; |
| 495 | return TRUE; |
| 496 | } |
| 497 | |
| 498 | p = _bfd_sparc_elf_hash_table(info)->app_regs + reg; |
| 499 | |
| 500 | if (p->name != NULL && strcmp (p->name, *namep)) |
| 501 | { |
| 502 | _bfd_error_handler |
| 503 | /* xgettext:c-format */ |
| 504 | (_("register %%g%d used incompatibly: %s in %pB," |
| 505 | " previously %s in %pB"), |
| 506 | (int) sym->st_value, **namep ? *namep : "#scratch", abfd, |
| 507 | *p->name ? p->name : "#scratch", p->abfd); |
| 508 | return FALSE; |
| 509 | } |
| 510 | |
| 511 | if (p->name == NULL) |
| 512 | { |
| 513 | if (**namep) |
| 514 | { |
| 515 | struct elf_link_hash_entry *h; |
| 516 | |
| 517 | h = (struct elf_link_hash_entry *) |
| 518 | bfd_link_hash_lookup (info->hash, *namep, FALSE, FALSE, FALSE); |
| 519 | |
| 520 | if (h != NULL) |
| 521 | { |
| 522 | unsigned char type = h->type; |
| 523 | |
| 524 | if (type > STT_FUNC) |
| 525 | type = 0; |
| 526 | _bfd_error_handler |
| 527 | /* xgettext:c-format */ |
| 528 | (_("symbol `%s' has differing types: REGISTER in %pB," |
| 529 | " previously %s in %pB"), |
| 530 | *namep, abfd, stt_types[type], p->abfd); |
| 531 | return FALSE; |
| 532 | } |
| 533 | |
| 534 | p->name = bfd_hash_allocate (&info->hash->table, |
| 535 | strlen (*namep) + 1); |
| 536 | if (!p->name) |
| 537 | return FALSE; |
| 538 | |
| 539 | strcpy (p->name, *namep); |
| 540 | } |
| 541 | else |
| 542 | p->name = ""; |
| 543 | p->bind = ELF_ST_BIND (sym->st_info); |
| 544 | p->abfd = abfd; |
| 545 | p->shndx = sym->st_shndx; |
| 546 | } |
| 547 | else |
| 548 | { |
| 549 | if (p->bind == STB_WEAK |
| 550 | && ELF_ST_BIND (sym->st_info) == STB_GLOBAL) |
| 551 | { |
| 552 | p->bind = STB_GLOBAL; |
| 553 | p->abfd = abfd; |
| 554 | } |
| 555 | } |
| 556 | *namep = NULL; |
| 557 | return TRUE; |
| 558 | } |
| 559 | else if (*namep && **namep |
| 560 | && info->output_bfd->xvec == abfd->xvec) |
| 561 | { |
| 562 | int i; |
| 563 | struct _bfd_sparc_elf_app_reg *p; |
| 564 | |
| 565 | p = _bfd_sparc_elf_hash_table(info)->app_regs; |
| 566 | for (i = 0; i < 4; i++, p++) |
| 567 | if (p->name != NULL && ! strcmp (p->name, *namep)) |
| 568 | { |
| 569 | unsigned char type = ELF_ST_TYPE (sym->st_info); |
| 570 | |
| 571 | if (type > STT_FUNC) |
| 572 | type = 0; |
| 573 | _bfd_error_handler |
| 574 | /* xgettext:c-format */ |
| 575 | (_("Symbol `%s' has differing types: %s in %pB," |
| 576 | " previously REGISTER in %pB"), |
| 577 | *namep, stt_types[type], abfd, p->abfd); |
| 578 | return FALSE; |
| 579 | } |
| 580 | } |
| 581 | return TRUE; |
| 582 | } |
| 583 | |
| 584 | /* This function takes care of emitting STT_REGISTER symbols |
| 585 | which we cannot easily keep in the symbol hash table. */ |
| 586 | |
| 587 | static bfd_boolean |
| 588 | elf64_sparc_output_arch_syms (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 589 | struct bfd_link_info *info, |
| 590 | void * flaginfo, |
| 591 | int (*func) (void *, const char *, |
| 592 | Elf_Internal_Sym *, |
| 593 | asection *, |
| 594 | struct elf_link_hash_entry *)) |
| 595 | { |
| 596 | int reg; |
| 597 | struct _bfd_sparc_elf_app_reg *app_regs = |
| 598 | _bfd_sparc_elf_hash_table(info)->app_regs; |
| 599 | Elf_Internal_Sym sym; |
| 600 | |
| 601 | for (reg = 0; reg < 4; reg++) |
| 602 | if (app_regs [reg].name != NULL) |
| 603 | { |
| 604 | if (info->strip == strip_some |
| 605 | && bfd_hash_lookup (info->keep_hash, |
| 606 | app_regs [reg].name, |
| 607 | FALSE, FALSE) == NULL) |
| 608 | continue; |
| 609 | |
| 610 | sym.st_value = reg < 2 ? reg + 2 : reg + 4; |
| 611 | sym.st_size = 0; |
| 612 | sym.st_other = 0; |
| 613 | sym.st_info = ELF_ST_INFO (app_regs [reg].bind, STT_REGISTER); |
| 614 | sym.st_shndx = app_regs [reg].shndx; |
| 615 | sym.st_target_internal = 0; |
| 616 | if ((*func) (flaginfo, app_regs [reg].name, &sym, |
| 617 | sym.st_shndx == SHN_ABS |
| 618 | ? bfd_abs_section_ptr : bfd_und_section_ptr, |
| 619 | NULL) != 1) |
| 620 | return FALSE; |
| 621 | } |
| 622 | |
| 623 | return TRUE; |
| 624 | } |
| 625 | |
| 626 | static int |
| 627 | elf64_sparc_get_symbol_type (Elf_Internal_Sym *elf_sym, int type) |
| 628 | { |
| 629 | if (ELF_ST_TYPE (elf_sym->st_info) == STT_REGISTER) |
| 630 | return STT_REGISTER; |
| 631 | else |
| 632 | return type; |
| 633 | } |
| 634 | |
| 635 | /* A STB_GLOBAL,STT_REGISTER symbol should be BSF_GLOBAL |
| 636 | even in SHN_UNDEF section. */ |
| 637 | |
| 638 | static void |
| 639 | elf64_sparc_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *asym) |
| 640 | { |
| 641 | elf_symbol_type *elfsym; |
| 642 | |
| 643 | elfsym = (elf_symbol_type *) asym; |
| 644 | if (elfsym->internal_elf_sym.st_info |
| 645 | == ELF_ST_INFO (STB_GLOBAL, STT_REGISTER)) |
| 646 | { |
| 647 | asym->flags |= BSF_GLOBAL; |
| 648 | } |
| 649 | } |
| 650 | |
| 651 | \f |
| 652 | /* Functions for dealing with the e_flags field. */ |
| 653 | |
| 654 | /* Merge backend specific data from an object file to the output |
| 655 | object file when linking. */ |
| 656 | |
| 657 | static bfd_boolean |
| 658 | elf64_sparc_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
| 659 | { |
| 660 | bfd *obfd = info->output_bfd; |
| 661 | bfd_boolean error; |
| 662 | flagword new_flags, old_flags; |
| 663 | int new_mm, old_mm; |
| 664 | |
| 665 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 666 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 667 | return TRUE; |
| 668 | |
| 669 | new_flags = elf_elfheader (ibfd)->e_flags; |
| 670 | old_flags = elf_elfheader (obfd)->e_flags; |
| 671 | |
| 672 | if (!elf_flags_init (obfd)) /* First call, no flags set */ |
| 673 | { |
| 674 | elf_flags_init (obfd) = TRUE; |
| 675 | elf_elfheader (obfd)->e_flags = new_flags; |
| 676 | } |
| 677 | |
| 678 | else if (new_flags == old_flags) /* Compatible flags are ok */ |
| 679 | ; |
| 680 | |
| 681 | else /* Incompatible flags */ |
| 682 | { |
| 683 | error = FALSE; |
| 684 | |
| 685 | #define EF_SPARC_ISA_EXTENSIONS \ |
| 686 | (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3 | EF_SPARC_HAL_R1) |
| 687 | |
| 688 | if ((ibfd->flags & DYNAMIC) != 0) |
| 689 | { |
| 690 | /* We don't want dynamic objects memory ordering and |
| 691 | architecture to have any role. That's what dynamic linker |
| 692 | should do. */ |
| 693 | new_flags &= ~(EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS); |
| 694 | new_flags |= (old_flags |
| 695 | & (EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS)); |
| 696 | } |
| 697 | else |
| 698 | { |
| 699 | /* Choose the highest architecture requirements. */ |
| 700 | old_flags |= (new_flags & EF_SPARC_ISA_EXTENSIONS); |
| 701 | new_flags |= (old_flags & EF_SPARC_ISA_EXTENSIONS); |
| 702 | if ((old_flags & (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3)) |
| 703 | && (old_flags & EF_SPARC_HAL_R1)) |
| 704 | { |
| 705 | error = TRUE; |
| 706 | _bfd_error_handler |
| 707 | (_("%pB: linking UltraSPARC specific with HAL specific code"), |
| 708 | ibfd); |
| 709 | } |
| 710 | /* Choose the most restrictive memory ordering. */ |
| 711 | old_mm = (old_flags & EF_SPARCV9_MM); |
| 712 | new_mm = (new_flags & EF_SPARCV9_MM); |
| 713 | old_flags &= ~EF_SPARCV9_MM; |
| 714 | new_flags &= ~EF_SPARCV9_MM; |
| 715 | if (new_mm < old_mm) |
| 716 | old_mm = new_mm; |
| 717 | old_flags |= old_mm; |
| 718 | new_flags |= old_mm; |
| 719 | } |
| 720 | |
| 721 | /* Warn about any other mismatches */ |
| 722 | if (new_flags != old_flags) |
| 723 | { |
| 724 | error = TRUE; |
| 725 | _bfd_error_handler |
| 726 | /* xgettext:c-format */ |
| 727 | (_("%pB: uses different e_flags (%#x) fields than previous modules (%#x)"), |
| 728 | ibfd, new_flags, old_flags); |
| 729 | } |
| 730 | |
| 731 | elf_elfheader (obfd)->e_flags = old_flags; |
| 732 | |
| 733 | if (error) |
| 734 | { |
| 735 | bfd_set_error (bfd_error_bad_value); |
| 736 | return FALSE; |
| 737 | } |
| 738 | } |
| 739 | return _bfd_sparc_elf_merge_private_bfd_data (ibfd, info); |
| 740 | } |
| 741 | |
| 742 | /* MARCO: Set the correct entry size for the .stab section. */ |
| 743 | |
| 744 | static bfd_boolean |
| 745 | elf64_sparc_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
| 746 | Elf_Internal_Shdr *hdr ATTRIBUTE_UNUSED, |
| 747 | asection *sec) |
| 748 | { |
| 749 | const char *name; |
| 750 | |
| 751 | name = bfd_get_section_name (abfd, sec); |
| 752 | |
| 753 | if (strcmp (name, ".stab") == 0) |
| 754 | { |
| 755 | /* Even in the 64bit case the stab entries are only 12 bytes long. */ |
| 756 | elf_section_data (sec)->this_hdr.sh_entsize = 12; |
| 757 | } |
| 758 | |
| 759 | return TRUE; |
| 760 | } |
| 761 | \f |
| 762 | /* Print a STT_REGISTER symbol to file FILE. */ |
| 763 | |
| 764 | static const char * |
| 765 | elf64_sparc_print_symbol_all (bfd *abfd ATTRIBUTE_UNUSED, void * filep, |
| 766 | asymbol *symbol) |
| 767 | { |
| 768 | FILE *file = (FILE *) filep; |
| 769 | int reg, type; |
| 770 | |
| 771 | if (ELF_ST_TYPE (((elf_symbol_type *) symbol)->internal_elf_sym.st_info) |
| 772 | != STT_REGISTER) |
| 773 | return NULL; |
| 774 | |
| 775 | reg = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value; |
| 776 | type = symbol->flags; |
| 777 | fprintf (file, "REG_%c%c%11s%c%c R", "GOLI" [reg / 8], '0' + (reg & 7), "", |
| 778 | ((type & BSF_LOCAL) |
| 779 | ? (type & BSF_GLOBAL) ? '!' : 'l' |
| 780 | : (type & BSF_GLOBAL) ? 'g' : ' '), |
| 781 | (type & BSF_WEAK) ? 'w' : ' '); |
| 782 | if (symbol->name == NULL || symbol->name [0] == '\0') |
| 783 | return "#scratch"; |
| 784 | else |
| 785 | return symbol->name; |
| 786 | } |
| 787 | \f |
| 788 | /* Used to decide how to sort relocs in an optimal manner for the |
| 789 | dynamic linker, before writing them out. */ |
| 790 | |
| 791 | static enum elf_reloc_type_class |
| 792 | elf64_sparc_reloc_type_class (const struct bfd_link_info *info, |
| 793 | const asection *rel_sec ATTRIBUTE_UNUSED, |
| 794 | const Elf_Internal_Rela *rela) |
| 795 | { |
| 796 | bfd *abfd = info->output_bfd; |
| 797 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 798 | struct _bfd_sparc_elf_link_hash_table *htab |
| 799 | = _bfd_sparc_elf_hash_table (info); |
| 800 | BFD_ASSERT (htab != NULL); |
| 801 | |
| 802 | if (htab->elf.dynsym != NULL |
| 803 | && htab->elf.dynsym->contents != NULL) |
| 804 | { |
| 805 | /* Check relocation against STT_GNU_IFUNC symbol if there are |
| 806 | dynamic symbols. */ |
| 807 | unsigned long r_symndx = htab->r_symndx (rela->r_info); |
| 808 | if (r_symndx != STN_UNDEF) |
| 809 | { |
| 810 | Elf_Internal_Sym sym; |
| 811 | if (!bed->s->swap_symbol_in (abfd, |
| 812 | (htab->elf.dynsym->contents |
| 813 | + r_symndx * bed->s->sizeof_sym), |
| 814 | 0, &sym)) |
| 815 | abort (); |
| 816 | |
| 817 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
| 818 | return reloc_class_ifunc; |
| 819 | } |
| 820 | } |
| 821 | |
| 822 | switch ((int) ELF64_R_TYPE (rela->r_info)) |
| 823 | { |
| 824 | case R_SPARC_IRELATIVE: |
| 825 | return reloc_class_ifunc; |
| 826 | case R_SPARC_RELATIVE: |
| 827 | return reloc_class_relative; |
| 828 | case R_SPARC_JMP_SLOT: |
| 829 | return reloc_class_plt; |
| 830 | case R_SPARC_COPY: |
| 831 | return reloc_class_copy; |
| 832 | default: |
| 833 | return reloc_class_normal; |
| 834 | } |
| 835 | } |
| 836 | |
| 837 | /* Relocations in the 64 bit SPARC ELF ABI are more complex than in |
| 838 | standard ELF, because R_SPARC_OLO10 has secondary addend in |
| 839 | ELF64_R_TYPE_DATA field. This structure is used to redirect the |
| 840 | relocation handling routines. */ |
| 841 | |
| 842 | const struct elf_size_info elf64_sparc_size_info = |
| 843 | { |
| 844 | sizeof (Elf64_External_Ehdr), |
| 845 | sizeof (Elf64_External_Phdr), |
| 846 | sizeof (Elf64_External_Shdr), |
| 847 | sizeof (Elf64_External_Rel), |
| 848 | sizeof (Elf64_External_Rela), |
| 849 | sizeof (Elf64_External_Sym), |
| 850 | sizeof (Elf64_External_Dyn), |
| 851 | sizeof (Elf_External_Note), |
| 852 | 4, /* hash-table entry size. */ |
| 853 | /* Internal relocations per external relocations. |
| 854 | For link purposes we use just 1 internal per |
| 855 | 1 external, for assembly and slurp symbol table |
| 856 | we use 2. */ |
| 857 | 1, |
| 858 | 64, /* arch_size. */ |
| 859 | 3, /* log_file_align. */ |
| 860 | ELFCLASS64, |
| 861 | EV_CURRENT, |
| 862 | bfd_elf64_write_out_phdrs, |
| 863 | bfd_elf64_write_shdrs_and_ehdr, |
| 864 | bfd_elf64_checksum_contents, |
| 865 | elf64_sparc_write_relocs, |
| 866 | bfd_elf64_swap_symbol_in, |
| 867 | bfd_elf64_swap_symbol_out, |
| 868 | elf64_sparc_slurp_reloc_table, |
| 869 | bfd_elf64_slurp_symbol_table, |
| 870 | bfd_elf64_swap_dyn_in, |
| 871 | bfd_elf64_swap_dyn_out, |
| 872 | bfd_elf64_swap_reloc_in, |
| 873 | bfd_elf64_swap_reloc_out, |
| 874 | bfd_elf64_swap_reloca_in, |
| 875 | bfd_elf64_swap_reloca_out |
| 876 | }; |
| 877 | |
| 878 | #define TARGET_BIG_SYM sparc_elf64_vec |
| 879 | #define TARGET_BIG_NAME "elf64-sparc" |
| 880 | #define ELF_ARCH bfd_arch_sparc |
| 881 | #define ELF_MAXPAGESIZE 0x100000 |
| 882 | #define ELF_COMMONPAGESIZE 0x2000 |
| 883 | |
| 884 | /* This is the official ABI value. */ |
| 885 | #define ELF_MACHINE_CODE EM_SPARCV9 |
| 886 | |
| 887 | /* This is the value that we used before the ABI was released. */ |
| 888 | #define ELF_MACHINE_ALT1 EM_OLD_SPARCV9 |
| 889 | |
| 890 | #define elf_backend_reloc_type_class \ |
| 891 | elf64_sparc_reloc_type_class |
| 892 | #define bfd_elf64_get_reloc_upper_bound \ |
| 893 | elf64_sparc_get_reloc_upper_bound |
| 894 | #define bfd_elf64_get_dynamic_reloc_upper_bound \ |
| 895 | elf64_sparc_get_dynamic_reloc_upper_bound |
| 896 | #define bfd_elf64_canonicalize_reloc \ |
| 897 | elf64_sparc_canonicalize_reloc |
| 898 | #define bfd_elf64_canonicalize_dynamic_reloc \ |
| 899 | elf64_sparc_canonicalize_dynamic_reloc |
| 900 | #define bfd_elf64_set_reloc \ |
| 901 | elf64_sparc_set_reloc |
| 902 | #define elf_backend_add_symbol_hook \ |
| 903 | elf64_sparc_add_symbol_hook |
| 904 | #define elf_backend_get_symbol_type \ |
| 905 | elf64_sparc_get_symbol_type |
| 906 | #define elf_backend_symbol_processing \ |
| 907 | elf64_sparc_symbol_processing |
| 908 | #define elf_backend_print_symbol_all \ |
| 909 | elf64_sparc_print_symbol_all |
| 910 | #define elf_backend_output_arch_syms \ |
| 911 | elf64_sparc_output_arch_syms |
| 912 | #define bfd_elf64_bfd_merge_private_bfd_data \ |
| 913 | elf64_sparc_merge_private_bfd_data |
| 914 | #define elf_backend_fake_sections \ |
| 915 | elf64_sparc_fake_sections |
| 916 | #define elf_backend_size_info \ |
| 917 | elf64_sparc_size_info |
| 918 | |
| 919 | #define elf_backend_plt_sym_val \ |
| 920 | _bfd_sparc_elf_plt_sym_val |
| 921 | #define bfd_elf64_bfd_link_hash_table_create \ |
| 922 | _bfd_sparc_elf_link_hash_table_create |
| 923 | #define elf_info_to_howto \ |
| 924 | _bfd_sparc_elf_info_to_howto |
| 925 | #define elf_backend_copy_indirect_symbol \ |
| 926 | _bfd_sparc_elf_copy_indirect_symbol |
| 927 | #define bfd_elf64_bfd_reloc_type_lookup \ |
| 928 | _bfd_sparc_elf_reloc_type_lookup |
| 929 | #define bfd_elf64_bfd_reloc_name_lookup \ |
| 930 | _bfd_sparc_elf_reloc_name_lookup |
| 931 | #define bfd_elf64_bfd_relax_section \ |
| 932 | _bfd_sparc_elf_relax_section |
| 933 | #define bfd_elf64_new_section_hook \ |
| 934 | _bfd_sparc_elf_new_section_hook |
| 935 | |
| 936 | #define elf_backend_create_dynamic_sections \ |
| 937 | _bfd_sparc_elf_create_dynamic_sections |
| 938 | #define elf_backend_relocs_compatible \ |
| 939 | _bfd_elf_relocs_compatible |
| 940 | #define elf_backend_check_relocs \ |
| 941 | _bfd_sparc_elf_check_relocs |
| 942 | #define elf_backend_adjust_dynamic_symbol \ |
| 943 | _bfd_sparc_elf_adjust_dynamic_symbol |
| 944 | #define elf_backend_omit_section_dynsym \ |
| 945 | _bfd_sparc_elf_omit_section_dynsym |
| 946 | #define elf_backend_size_dynamic_sections \ |
| 947 | _bfd_sparc_elf_size_dynamic_sections |
| 948 | #define elf_backend_relocate_section \ |
| 949 | _bfd_sparc_elf_relocate_section |
| 950 | #define elf_backend_finish_dynamic_symbol \ |
| 951 | _bfd_sparc_elf_finish_dynamic_symbol |
| 952 | #define elf_backend_finish_dynamic_sections \ |
| 953 | _bfd_sparc_elf_finish_dynamic_sections |
| 954 | #define elf_backend_fixup_symbol \ |
| 955 | _bfd_sparc_elf_fixup_symbol |
| 956 | |
| 957 | #define bfd_elf64_mkobject \ |
| 958 | _bfd_sparc_elf_mkobject |
| 959 | #define elf_backend_object_p \ |
| 960 | _bfd_sparc_elf_object_p |
| 961 | #define elf_backend_gc_mark_hook \ |
| 962 | _bfd_sparc_elf_gc_mark_hook |
| 963 | #define elf_backend_init_index_section \ |
| 964 | _bfd_elf_init_1_index_section |
| 965 | |
| 966 | #define elf_backend_can_gc_sections 1 |
| 967 | #define elf_backend_can_refcount 1 |
| 968 | #define elf_backend_want_got_plt 0 |
| 969 | #define elf_backend_plt_readonly 0 |
| 970 | #define elf_backend_want_plt_sym 1 |
| 971 | #define elf_backend_got_header_size 8 |
| 972 | #define elf_backend_want_dynrelro 1 |
| 973 | #define elf_backend_rela_normal 1 |
| 974 | |
| 975 | /* Section 5.2.4 of the ABI specifies a 256-byte boundary for the table. */ |
| 976 | #define elf_backend_plt_alignment 8 |
| 977 | |
| 978 | #include "elf64-target.h" |
| 979 | |
| 980 | /* FreeBSD support */ |
| 981 | #undef TARGET_BIG_SYM |
| 982 | #define TARGET_BIG_SYM sparc_elf64_fbsd_vec |
| 983 | #undef TARGET_BIG_NAME |
| 984 | #define TARGET_BIG_NAME "elf64-sparc-freebsd" |
| 985 | #undef ELF_OSABI |
| 986 | #define ELF_OSABI ELFOSABI_FREEBSD |
| 987 | |
| 988 | #undef elf64_bed |
| 989 | #define elf64_bed elf64_sparc_fbsd_bed |
| 990 | |
| 991 | #include "elf64-target.h" |
| 992 | |
| 993 | /* Solaris 2. */ |
| 994 | |
| 995 | #undef TARGET_BIG_SYM |
| 996 | #define TARGET_BIG_SYM sparc_elf64_sol2_vec |
| 997 | #undef TARGET_BIG_NAME |
| 998 | #define TARGET_BIG_NAME "elf64-sparc-sol2" |
| 999 | |
| 1000 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE |
| 1001 | objects won't be recognized. */ |
| 1002 | #undef ELF_OSABI |
| 1003 | |
| 1004 | #undef elf64_bed |
| 1005 | #define elf64_bed elf64_sparc_sol2_bed |
| 1006 | |
| 1007 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
| 1008 | boundary. */ |
| 1009 | #undef elf_backend_static_tls_alignment |
| 1010 | #define elf_backend_static_tls_alignment 16 |
| 1011 | |
| 1012 | #include "elf64-target.h" |