1 /* SuperH SH64-specific support for 32-bit ELF 2 Copyright (C) 2000-2016 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 #define SH64_ELF 22 23 #include "sysdep.h" 24 #include "bfd.h" 25 #include "elf-bfd.h" 26 #include "../opcodes/sh64-opc.h" 27 #include "elf32-sh64.h" 28 29 /* Add a suffix for datalabel indirection symbols. It must not match any 30 other symbols; user symbols with or without version or other 31 decoration. It must only be used internally and not emitted by any 32 means. */ 33 #define DATALABEL_SUFFIX " DL" 34 35 /* Used to hold data for function called through bfd_map_over_sections. */ 36 struct sh64_find_section_vma_data 37 { 38 asection *section; 39 bfd_vma addr; 40 }; 41 42 static bfd_boolean sh64_elf_new_section_hook 43 (bfd *, asection *); 44 static bfd_boolean sh64_elf_copy_private_data 45 (bfd *, bfd *); 46 static bfd_boolean sh64_elf_merge_private_data 47 (bfd *, bfd *); 48 static bfd_boolean sh64_elf_fake_sections 49 (bfd *, Elf_Internal_Shdr *, asection *); 50 static bfd_boolean sh64_elf_set_private_flags 51 (bfd *, flagword); 52 static bfd_boolean sh64_elf_set_mach_from_flags 53 (bfd *); 54 static bfd_boolean shmedia_prepare_reloc 55 (struct bfd_link_info *, bfd *, asection *, bfd_byte *, 56 const Elf_Internal_Rela *, bfd_vma *); 57 static int sh64_elf_get_symbol_type 58 (Elf_Internal_Sym *, int); 59 static bfd_boolean sh64_elf_add_symbol_hook 60 (bfd *, struct bfd_link_info *, Elf_Internal_Sym *, const char **, 61 flagword *, asection **, bfd_vma *); 62 static int sh64_elf_link_output_symbol_hook 63 (struct bfd_link_info *, const char *, Elf_Internal_Sym *, asection *, 64 struct elf_link_hash_entry *); 65 static bfd_boolean sh64_backend_section_from_shdr 66 (bfd *, Elf_Internal_Shdr *, const char *, int); 67 static void sh64_elf_final_write_processing 68 (bfd *, bfd_boolean); 69 static bfd_boolean sh64_bfd_elf_copy_private_section_data 70 (bfd *, asection *, bfd *, asection *); 71 static void sh64_find_section_for_address 72 (bfd *, asection *, void *); 73 74 /* Let elf32-sh.c handle the "bfd_" definitions, so we only have to 75 intrude with an #ifndef around the function definition. */ 76 #define sh_elf_copy_private_data sh64_elf_copy_private_data 77 #define sh_elf_merge_private_data sh64_elf_merge_private_data 78 #define sh_elf_set_private_flags sh64_elf_set_private_flags 79 /* Typo in elf32-sh.c (and unlinear name). */ 80 #define bfd_elf32_bfd_set_private_flags sh64_elf_set_private_flags 81 #define sh_elf_set_mach_from_flags sh64_elf_set_mach_from_flags 82 83 #define elf_backend_sign_extend_vma 1 84 #define elf_backend_fake_sections sh64_elf_fake_sections 85 #define elf_backend_get_symbol_type sh64_elf_get_symbol_type 86 #define elf_backend_add_symbol_hook sh64_elf_add_symbol_hook 87 #define elf_backend_link_output_symbol_hook \ 88 sh64_elf_link_output_symbol_hook 89 #define elf_backend_merge_symbol_attribute sh64_elf_merge_symbol_attribute 90 #define elf_backend_final_write_processing sh64_elf_final_write_processing 91 #define elf_backend_section_from_shdr sh64_backend_section_from_shdr 92 #define elf_backend_special_sections sh64_elf_special_sections 93 #define elf_backend_section_flags sh64_elf_section_flags 94 95 #define bfd_elf32_new_section_hook sh64_elf_new_section_hook 96 97 /* For objcopy, we need to set up sh64_elf_section_data (asection *) from 98 incoming section flags. This is otherwise done in sh64elf.em when 99 linking or tc-sh64.c when assembling. */ 100 #define bfd_elf32_bfd_copy_private_section_data \ 101 sh64_bfd_elf_copy_private_section_data 102 103 /* This COFF-only function (only compiled with COFF support, making 104 ELF-only chains problematic) returns TRUE early for SH4, so let's just 105 define it TRUE here. */ 106 #define _bfd_sh_align_load_span(a,b,c,d,e,f,g,h,i,j) \ 107 ((void) f, (void) h, (void) i, TRUE) 108 109 #define GOT_BIAS (-((long)-32768)) 110 #define INCLUDE_SHMEDIA 111 #define SH_TARGET_ALREADY_DEFINED 112 #include "elf32-sh.c" 113 114 /* Tack some extra info on struct bfd_elf_section_data. */ 115 116 static bfd_boolean 117 sh64_elf_new_section_hook (bfd *abfd, asection *sec) 118 { 119 if (!sec->used_by_bfd) 120 { 121 struct _sh64_elf_section_data *sdata; 122 bfd_size_type amt = sizeof (*sdata); 123 124 sdata = bfd_zalloc (abfd, amt); 125 if (sdata == NULL) 126 return FALSE; 127 sec->used_by_bfd = sdata; 128 } 129 130 return _bfd_elf_new_section_hook (abfd, sec); 131 } 132 133 /* Set the SHF_SH5_ISA32 flag for ISA SHmedia code sections, and pass 134 through SHT_SH5_CR_SORTED on a sorted .cranges section. */ 135 136 bfd_boolean 137 sh64_elf_fake_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 138 Elf_Internal_Shdr *elf_section_hdr, 139 asection *asect) 140 { 141 if (sh64_elf_section_data (asect)->sh64_info != NULL) 142 elf_section_hdr->sh_flags 143 |= sh64_elf_section_data (asect)->sh64_info->contents_flags; 144 145 /* If this section has the SEC_SORT_ENTRIES flag set, it is a sorted 146 .cranges section passing through objcopy. */ 147 if ((bfd_get_section_flags (output_bfd, asect) & SEC_SORT_ENTRIES) != 0 148 && strcmp (bfd_get_section_name (output_bfd, asect), 149 SH64_CRANGES_SECTION_NAME) == 0) 150 elf_section_hdr->sh_type = SHT_SH5_CR_SORTED; 151 152 return TRUE; 153 } 154 155 static bfd_boolean 156 sh64_elf_set_mach_from_flags (bfd *abfd) 157 { 158 flagword flags = elf_elfheader (abfd)->e_flags; 159 160 switch (flags & EF_SH_MACH_MASK) 161 { 162 case EF_SH5: 163 /* These are fit to execute on SH5. Just one but keep the switch 164 construct to make additions easy. */ 165 bfd_default_set_arch_mach (abfd, bfd_arch_sh, bfd_mach_sh5); 166 break; 167 168 default: 169 bfd_set_error (bfd_error_wrong_format); 170 return FALSE; 171 } 172 173 return TRUE; 174 } 175 176 static bfd_boolean 177 sh64_elf_section_flags (flagword *flags, 178 const Elf_Internal_Shdr *hdr) 179 { 180 if (hdr->bfd_section == NULL) 181 return FALSE; 182 183 if (strcmp (hdr->bfd_section->name, SH64_CRANGES_SECTION_NAME) == 0) 184 *flags |= SEC_DEBUGGING; 185 186 return TRUE; 187 } 188 189 static bfd_boolean 190 sh64_elf_copy_private_data (bfd * ibfd, bfd * obfd) 191 { 192 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour 193 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 194 return TRUE; 195 196 BFD_ASSERT (!elf_flags_init (obfd) 197 || (elf_elfheader (obfd)->e_flags 198 == elf_elfheader (ibfd)->e_flags)); 199 200 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; 201 202 return _bfd_elf_copy_private_bfd_data (ibfd, obfd); 203 } 204 205 static bfd_boolean 206 sh64_elf_merge_private_data (bfd *ibfd, bfd *obfd) 207 { 208 flagword old_flags, new_flags; 209 210 if (! _bfd_generic_verify_endian_match (ibfd, obfd)) 211 return FALSE; 212 213 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour 214 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 215 return TRUE; 216 217 if (bfd_get_arch_size (ibfd) != bfd_get_arch_size (obfd)) 218 { 219 const char *msg; 220 221 if (bfd_get_arch_size (ibfd) == 32 222 && bfd_get_arch_size (obfd) == 64) 223 msg = _("%s: compiled as 32-bit object and %s is 64-bit"); 224 else if (bfd_get_arch_size (ibfd) == 64 225 && bfd_get_arch_size (obfd) == 32) 226 msg = _("%s: compiled as 64-bit object and %s is 32-bit"); 227 else 228 msg = _("%s: object size does not match that of target %s"); 229 230 (*_bfd_error_handler) (msg, bfd_get_filename (ibfd), 231 bfd_get_filename (obfd)); 232 bfd_set_error (bfd_error_wrong_format); 233 return FALSE; 234 } 235 236 old_flags = elf_elfheader (obfd)->e_flags; 237 new_flags = elf_elfheader (ibfd)->e_flags; 238 if (! elf_flags_init (obfd)) 239 { 240 /* This happens when ld starts out with a 'blank' output file. */ 241 elf_flags_init (obfd) = TRUE; 242 elf_elfheader (obfd)->e_flags = old_flags = new_flags; 243 } 244 /* We don't allow linking in non-SH64 code. */ 245 else if ((new_flags & EF_SH_MACH_MASK) != EF_SH5) 246 { 247 (*_bfd_error_handler) 248 ("%s: uses non-SH64 instructions while previous modules use SH64 instructions", 249 bfd_get_filename (ibfd)); 250 bfd_set_error (bfd_error_bad_value); 251 return FALSE; 252 } 253 254 /* I can't think of anything sane other than old_flags being EF_SH5 and 255 that we need to preserve that. */ 256 elf_elfheader (obfd)->e_flags = old_flags; 257 return sh64_elf_set_mach_from_flags (obfd); 258 } 259 260 /* Handle a SH64-specific section when reading an object file. This 261 is called when bfd_section_from_shdr finds a section with an unknown 262 type. 263 264 We only recognize SHT_SH5_CR_SORTED, on the .cranges section. */ 265 266 bfd_boolean 267 sh64_backend_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, 268 const char *name, int shindex) 269 { 270 flagword flags = 0; 271 272 /* We do like MIPS with a bit switch for recognized types, and returning 273 FALSE for a recognized section type with an unexpected name. Right 274 now we only have one recognized type, but that might change. */ 275 switch (hdr->sh_type) 276 { 277 case SHT_SH5_CR_SORTED: 278 if (strcmp (name, SH64_CRANGES_SECTION_NAME) != 0) 279 return FALSE; 280 281 /* We set the SEC_SORT_ENTRIES flag so it can be passed on to 282 sh64_elf_fake_sections, keeping SHT_SH5_CR_SORTED if this object 283 passes through objcopy. Perhaps it is brittle; the flag can 284 suddenly be used by other BFD parts, but it seems not really used 285 anywhere at the moment. */ 286 flags = SEC_DEBUGGING | SEC_SORT_ENTRIES; 287 break; 288 289 default: 290 return FALSE; 291 } 292 293 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) 294 return FALSE; 295 296 if (flags 297 && ! bfd_set_section_flags (abfd, hdr->bfd_section, 298 bfd_get_section_flags (abfd, 299 hdr->bfd_section) 300 | flags)) 301 return FALSE; 302 303 return TRUE; 304 } 305 306 /* In contrast to sh64_backend_section_from_shdr, this is called for all 307 sections, but only when copying sections, not when linking or 308 assembling. We need to set up the sh64_elf_section_data (asection *) 309 structure for the SH64 ELF section flags to be copied correctly. */ 310 311 bfd_boolean 312 sh64_bfd_elf_copy_private_section_data (bfd *ibfd, asection *isec, 313 bfd *obfd, asection *osec) 314 { 315 struct sh64_section_data *sh64_sec_data; 316 317 if (ibfd->xvec->flavour != bfd_target_elf_flavour 318 || obfd->xvec->flavour != bfd_target_elf_flavour) 319 return TRUE; 320 321 if (! _bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec)) 322 return FALSE; 323 324 sh64_sec_data = sh64_elf_section_data (isec)->sh64_info; 325 if (sh64_sec_data == NULL) 326 { 327 sh64_sec_data = bfd_zmalloc (sizeof (struct sh64_section_data)); 328 329 if (sh64_sec_data == NULL) 330 return FALSE; 331 332 sh64_sec_data->contents_flags 333 = (elf_section_data (isec)->this_hdr.sh_flags 334 & (SHF_SH5_ISA32 | SHF_SH5_ISA32_MIXED)); 335 336 sh64_elf_section_data (osec)->sh64_info = sh64_sec_data; 337 } 338 339 return TRUE; 340 } 341 342 /* Function to keep SH64 specific file flags. */ 343 344 static bfd_boolean 345 sh64_elf_set_private_flags (bfd *abfd, flagword flags) 346 { 347 BFD_ASSERT (! elf_flags_init (abfd) 348 || elf_elfheader (abfd)->e_flags == flags); 349 350 elf_elfheader (abfd)->e_flags = flags; 351 elf_flags_init (abfd) = TRUE; 352 return sh64_elf_set_mach_from_flags (abfd); 353 } 354 355 /* Called when writing out an object file to decide the type of a symbol. */ 356 357 static int 358 sh64_elf_get_symbol_type (Elf_Internal_Sym *elf_sym, int type) 359 { 360 if (ELF_ST_TYPE (elf_sym->st_info) == STT_DATALABEL) 361 return STT_DATALABEL; 362 363 return type; 364 } 365 366 /* Hook called by the linker routine which adds symbols from an object 367 file. We must make indirect symbols for undefined symbols marked with 368 STT_DATALABEL, so relocations passing them will pick up that attribute 369 and neutralize STO_SH5_ISA32 found on the symbol definition. 370 371 There is a problem, though: We want to fill in the hash-table entry for 372 this symbol and signal to the caller that no further processing is 373 needed. But we don't have the index for this hash-table entry. We 374 rely here on that the current entry is the first hash-entry with NULL, 375 which seems brittle. Also, iterating over the hash-table to find that 376 entry is a linear operation on the number of symbols in this input 377 file, and this function should take constant time, so that's not good 378 too. Only comfort is that DataLabel references should only be found in 379 hand-written assembly code and thus be rare. FIXME: Talk maintainers 380 into adding an option to elf_add_symbol_hook (preferably) for the index 381 or the hash entry, alternatively adding the index to Elf_Internal_Sym 382 (not so good). */ 383 384 static bfd_boolean 385 sh64_elf_add_symbol_hook (bfd *abfd, struct bfd_link_info *info, 386 Elf_Internal_Sym *sym, const char **namep, 387 flagword *flagsp ATTRIBUTE_UNUSED, 388 asection **secp, bfd_vma *valp) 389 { 390 /* We want to do this for relocatable as well as final linking. */ 391 if (ELF_ST_TYPE (sym->st_info) == STT_DATALABEL 392 && is_elf_hash_table (info->hash)) 393 { 394 struct elf_link_hash_entry *h; 395 396 /* For relocatable links, we register the DataLabel sym in its own 397 right, and tweak the name when it's output. Otherwise, we make 398 an indirect symbol of it. */ 399 flagword flags 400 = bfd_link_relocatable (info) || info->emitrelocations 401 ? BSF_GLOBAL : BSF_GLOBAL | BSF_INDIRECT; 402 403 char *dl_name 404 = bfd_malloc (strlen (*namep) + sizeof (DATALABEL_SUFFIX)); 405 struct elf_link_hash_entry ** sym_hash = elf_sym_hashes (abfd); 406 407 BFD_ASSERT (sym_hash != NULL); 408 409 /* Allocation may fail. */ 410 if (dl_name == NULL) 411 return FALSE; 412 413 strcpy (dl_name, *namep); 414 strcat (dl_name, DATALABEL_SUFFIX); 415 416 h = (struct elf_link_hash_entry *) 417 bfd_link_hash_lookup (info->hash, dl_name, FALSE, FALSE, FALSE); 418 419 if (h == NULL) 420 { 421 /* No previous datalabel symbol. Make one. */ 422 struct bfd_link_hash_entry *bh = NULL; 423 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 424 425 if (! _bfd_generic_link_add_one_symbol (info, abfd, dl_name, 426 flags, *secp, *valp, 427 *namep, FALSE, 428 bed->collect, &bh)) 429 { 430 free (dl_name); 431 return FALSE; 432 } 433 434 h = (struct elf_link_hash_entry *) bh; 435 h->non_elf = 0; 436 h->type = STT_DATALABEL; 437 } 438 else 439 /* If a new symbol was created, it holds the allocated name. 440 Otherwise, we don't need it anymore and should deallocate it. */ 441 free (dl_name); 442 443 if (h->type != STT_DATALABEL 444 || ((bfd_link_relocatable (info) || info->emitrelocations) 445 && h->root.type != bfd_link_hash_undefined) 446 || (! bfd_link_relocatable (info) && !info->emitrelocations 447 && h->root.type != bfd_link_hash_indirect)) 448 { 449 /* Make sure we don't get confused on invalid input. */ 450 (*_bfd_error_handler) 451 (_("%s: encountered datalabel symbol in input"), 452 bfd_get_filename (abfd)); 453 bfd_set_error (bfd_error_bad_value); 454 return FALSE; 455 } 456 457 /* Now find the hash-table slot for this entry and fill it in. */ 458 while (*sym_hash != NULL) 459 sym_hash++; 460 *sym_hash = h; 461 462 /* Signal to caller to skip this symbol - we've handled it. */ 463 *namep = NULL; 464 } 465 466 return TRUE; 467 } 468 469 /* This hook function is called before the linker writes out a global 470 symbol. For relocatable links, DataLabel symbols will be present in 471 linker output. We cut off the special suffix on those symbols, so the 472 right name appears in the output. 473 474 When linking and emitting relocations, there can appear global symbols 475 that are not referenced by relocs, but rather only implicitly through 476 DataLabel references, a relation that is not visible to the linker. 477 Since no stripping of global symbols in done when doing such linking, 478 we don't need to look up and make sure to emit the main symbol for each 479 DataLabel symbol. */ 480 481 static int 482 sh64_elf_link_output_symbol_hook (struct bfd_link_info *info, 483 const char *cname, 484 Elf_Internal_Sym *sym, 485 asection *input_sec ATTRIBUTE_UNUSED, 486 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED) 487 { 488 char *name = (char *) cname; 489 490 if (bfd_link_relocatable (info) || info->emitrelocations) 491 { 492 if (ELF_ST_TYPE (sym->st_info) == STT_DATALABEL) 493 name[strlen (name) - strlen (DATALABEL_SUFFIX)] = 0; 494 } 495 496 return 1; 497 } 498 499 /* Check a SH64-specific reloc and put the value to relocate to into 500 RELOCATION, ready to pass to _bfd_final_link_relocate. Return FALSE if 501 bad value, TRUE if ok. */ 502 503 static bfd_boolean 504 shmedia_prepare_reloc (struct bfd_link_info *info, bfd *abfd, 505 asection *input_section, bfd_byte *contents, 506 const Elf_Internal_Rela *rel, bfd_vma *relocation) 507 { 508 bfd_vma disp, dropped; 509 510 switch (ELF32_R_TYPE (rel->r_info)) 511 { 512 case R_SH_PT_16: 513 /* Check the lowest bit of the destination field. If it is 1, we 514 check the ISA type of the destination (i.e. the low bit of the 515 "relocation" value, and emit an error if the instruction does not 516 match). If it is 0, we change a PTA to PTB. There should never 517 be a PTB that should change to a PTA; that indicates a toolchain 518 error; a mismatch with GAS. */ 519 { 520 char *msg = NULL; 521 bfd_vma insn = bfd_get_32 (abfd, contents + rel->r_offset); 522 523 if (insn & (1 << 10)) 524 { 525 /* Check matching insn and ISA (address of target). */ 526 if ((insn & SHMEDIA_PTB_BIT) != 0 527 && ((*relocation + rel->r_addend) & 1) != 0) 528 msg = _("PTB mismatch: a SHmedia address (bit 0 == 1)"); 529 else if ((insn & SHMEDIA_PTB_BIT) == 0 530 && ((*relocation + rel->r_addend) & 1) == 0) 531 msg = _("PTA mismatch: a SHcompact address (bit 0 == 0)"); 532 533 if (msg != NULL) 534 (*info->callbacks->reloc_dangerous) 535 (info, msg, abfd, input_section, rel->r_offset); 536 } 537 else 538 { 539 /* We shouldn't get here with a PTB insn and a R_SH_PT_16. It 540 means GAS output does not match expectations; a PTA or PTB 541 expressed as such (or a PT found at assembly to be PTB) 542 would match the test above, and PT expansion with an 543 unknown destination (or when relaxing) will get us here. */ 544 if ((insn & SHMEDIA_PTB_BIT) != 0) 545 { 546 (*_bfd_error_handler) 547 (_("%s: GAS error: unexpected PTB insn with R_SH_PT_16"), 548 bfd_get_filename (input_section->owner)); 549 return FALSE; 550 } 551 552 /* Change the PTA to a PTB, if destination indicates so. */ 553 if (((*relocation + rel->r_addend) & 1) == 0) 554 bfd_put_32 (abfd, insn | SHMEDIA_PTB_BIT, 555 contents + rel->r_offset); 556 } 557 } 558 559 case R_SH_SHMEDIA_CODE: 560 case R_SH_DIR5U: 561 case R_SH_DIR6S: 562 case R_SH_DIR6U: 563 case R_SH_DIR10S: 564 case R_SH_DIR10SW: 565 case R_SH_DIR10SL: 566 case R_SH_DIR10SQ: 567 case R_SH_IMMS16: 568 case R_SH_IMMU16: 569 case R_SH_IMM_LOW16: 570 case R_SH_IMM_LOW16_PCREL: 571 case R_SH_IMM_MEDLOW16: 572 case R_SH_IMM_MEDLOW16_PCREL: 573 case R_SH_IMM_MEDHI16: 574 case R_SH_IMM_MEDHI16_PCREL: 575 case R_SH_IMM_HI16: 576 case R_SH_IMM_HI16_PCREL: 577 case R_SH_64: 578 case R_SH_64_PCREL: 579 break; 580 581 default: 582 return FALSE; 583 } 584 585 disp = (*relocation & 0xf); 586 dropped = 0; 587 switch (ELF32_R_TYPE (rel->r_info)) 588 { 589 case R_SH_DIR10SW: dropped = disp & 1; break; 590 case R_SH_DIR10SL: dropped = disp & 3; break; 591 case R_SH_DIR10SQ: dropped = disp & 7; break; 592 } 593 if (dropped != 0) 594 { 595 (*_bfd_error_handler) 596 (_("%B: error: unaligned relocation type %d at %08x reloc %p\n"), 597 input_section->owner, ELF32_R_TYPE (rel->r_info), 598 (unsigned) rel->r_offset, relocation); 599 return FALSE; 600 } 601 602 return TRUE; 603 } 604 605 /* Helper function to locate the section holding a certain address. This 606 is called via bfd_map_over_sections. */ 607 608 static void 609 sh64_find_section_for_address (bfd *abfd ATTRIBUTE_UNUSED, 610 asection *section, void *data) 611 { 612 bfd_vma vma; 613 bfd_size_type size; 614 615 struct sh64_find_section_vma_data *fsec_datap 616 = (struct sh64_find_section_vma_data *) data; 617 618 /* Return if already found. */ 619 if (fsec_datap->section) 620 return; 621 622 /* If this section isn't part of the addressable contents, skip it. */ 623 if ((bfd_get_section_flags (abfd, section) & SEC_ALLOC) == 0) 624 return; 625 626 vma = bfd_get_section_vma (abfd, section); 627 if (fsec_datap->addr < vma) 628 return; 629 630 size = section->size; 631 if (fsec_datap->addr >= vma + size) 632 return; 633 634 fsec_datap->section = section; 635 } 636 637 /* Make sure to write out the generated entries in the .cranges section 638 when doing partial linking, and set bit 0 on the entry address if it 639 points to SHmedia code and write sorted .cranges entries when writing 640 executables (final linking and objcopy). */ 641 642 static void 643 sh64_elf_final_write_processing (bfd *abfd, 644 bfd_boolean linker ATTRIBUTE_UNUSED) 645 { 646 bfd_vma ld_generated_cranges_size; 647 asection *cranges 648 = bfd_get_section_by_name (abfd, SH64_CRANGES_SECTION_NAME); 649 650 /* If no new .cranges were added, the generic ELF linker parts will 651 write it all out. If not, we need to write them out when doing 652 partial linking. For a final link, we will sort them and write them 653 all out further below. */ 654 if (linker 655 && cranges != NULL 656 && elf_elfheader (abfd)->e_type != ET_EXEC 657 && (ld_generated_cranges_size 658 = sh64_elf_section_data (cranges)->sh64_info->cranges_growth) != 0) 659 { 660 bfd_vma incoming_cranges_size 661 = cranges->size - ld_generated_cranges_size; 662 663 if (! bfd_set_section_contents (abfd, cranges, 664 cranges->contents 665 + incoming_cranges_size, 666 cranges->output_offset 667 + incoming_cranges_size, 668 ld_generated_cranges_size)) 669 { 670 bfd_set_error (bfd_error_file_truncated); 671 (*_bfd_error_handler) 672 (_("%s: could not write out added .cranges entries"), 673 bfd_get_filename (abfd)); 674 } 675 } 676 677 /* Only set entry address bit 0 and sort .cranges when linking to an 678 executable; never with objcopy or strip. */ 679 if (linker && elf_elfheader (abfd)->e_type == ET_EXEC) 680 { 681 struct sh64_find_section_vma_data fsec_data; 682 sh64_elf_crange dummy; 683 684 /* For a final link, set the low bit of the entry address to 685 reflect whether or not it is a SHmedia address. 686 FIXME: Perhaps we shouldn't do this if the entry address was 687 supplied numerically, but we currently lack the infrastructure to 688 recognize that: The entry symbol, and info whether it is numeric 689 or a symbol name is kept private in the linker. */ 690 fsec_data.addr = elf_elfheader (abfd)->e_entry; 691 fsec_data.section = NULL; 692 693 bfd_map_over_sections (abfd, sh64_find_section_for_address, 694 &fsec_data); 695 if (fsec_data.section 696 && (sh64_get_contents_type (fsec_data.section, 697 elf_elfheader (abfd)->e_entry, 698 &dummy) == CRT_SH5_ISA32)) 699 elf_elfheader (abfd)->e_entry |= 1; 700 701 /* If we have a .cranges section, sort the entries. */ 702 if (cranges != NULL) 703 { 704 bfd_size_type cranges_size = cranges->size; 705 706 /* We know we always have these in memory at this time. */ 707 BFD_ASSERT (cranges->contents != NULL); 708 709 /* The .cranges may already have been sorted in the process of 710 finding out the ISA-type of the entry address. If not, we do 711 it here. */ 712 if (elf_section_data (cranges)->this_hdr.sh_type 713 != SHT_SH5_CR_SORTED) 714 { 715 qsort (cranges->contents, cranges_size / SH64_CRANGE_SIZE, 716 SH64_CRANGE_SIZE, 717 bfd_big_endian (cranges->owner) 718 ? _bfd_sh64_crange_qsort_cmpb 719 : _bfd_sh64_crange_qsort_cmpl); 720 elf_section_data (cranges)->this_hdr.sh_type 721 = SHT_SH5_CR_SORTED; 722 } 723 724 /* We need to write it out in whole as sorted. */ 725 if (! bfd_set_section_contents (abfd, cranges, 726 cranges->contents, 727 cranges->output_offset, 728 cranges_size)) 729 { 730 bfd_set_error (bfd_error_file_truncated); 731 (*_bfd_error_handler) 732 (_("%s: could not write out sorted .cranges entries"), 733 bfd_get_filename (abfd)); 734 } 735 } 736 } 737 } 738 739 /* Merge non visibility st_other attribute when the symbol comes from 740 a dynamic object. */ 741 static void 742 sh64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h, 743 const Elf_Internal_Sym *isym, 744 bfd_boolean definition, 745 bfd_boolean dynamic ATTRIBUTE_UNUSED) 746 { 747 if ((isym->st_other & ~ELF_ST_VISIBILITY (-1)) != 0) 748 { 749 unsigned char other; 750 751 /* Take the balance of OTHER from the definition. */ 752 other = (definition ? isym->st_other : h->other); 753 other &= ~ ELF_ST_VISIBILITY (-1); 754 h->other = other | ELF_ST_VISIBILITY (h->other); 755 } 756 757 return; 758 } 759 760 static const struct bfd_elf_special_section sh64_elf_special_sections[] = 761 { 762 { STRING_COMMA_LEN (".cranges"), 0, SHT_PROGBITS, 0 }, 763 { NULL, 0, 0, 0, 0 } 764 }; 765 766 #undef TARGET_BIG_SYM 767 #define TARGET_BIG_SYM sh64_elf32_vec 768 #undef TARGET_BIG_NAME 769 #define TARGET_BIG_NAME "elf32-sh64" 770 #undef TARGET_LITTLE_SYM 771 #define TARGET_LITTLE_SYM sh64_elf32_le_vec 772 #undef TARGET_LITTLE_NAME 773 #define TARGET_LITTLE_NAME "elf32-sh64l" 774 775 #include "elf32-target.h" 776 777 /* NetBSD support. */ 778 #undef TARGET_BIG_SYM 779 #define TARGET_BIG_SYM sh64_elf32_nbsd_vec 780 #undef TARGET_BIG_NAME 781 #define TARGET_BIG_NAME "elf32-sh64-nbsd" 782 #undef TARGET_LITTLE_SYM 783 #define TARGET_LITTLE_SYM sh64_elf32_nbsd_le_vec 784 #undef TARGET_LITTLE_NAME 785 #define TARGET_LITTLE_NAME "elf32-sh64l-nbsd" 786 #undef ELF_MAXPAGESIZE 787 #define ELF_MAXPAGESIZE 0x10000 788 #undef ELF_COMMONPAGESIZE 789 #undef elf_symbol_leading_char 790 #define elf_symbol_leading_char 0 791 #undef elf32_bed 792 #define elf32_bed elf32_sh64_nbsd_bed 793 794 #include "elf32-target.h" 795 796 /* Linux support. */ 797 #undef TARGET_BIG_SYM 798 #define TARGET_BIG_SYM sh64_elf32_linux_be_vec 799 #undef TARGET_BIG_NAME 800 #define TARGET_BIG_NAME "elf32-sh64big-linux" 801 #undef TARGET_LITTLE_SYM 802 #define TARGET_LITTLE_SYM sh64_elf32_linux_vec 803 #undef TARGET_LITTLE_NAME 804 #define TARGET_LITTLE_NAME "elf32-sh64-linux" 805 #undef elf32_bed 806 #define elf32_bed elf32_sh64_lin_bed 807 #undef ELF_COMMONPAGESIZE 808 #define ELF_COMMONPAGESIZE 0x1000 809 810 #include "elf32-target.h" 811 812
