elf32-fr30.c revision 1.9
1 /* FR30-specific support for 32-bit ELF. 2 Copyright (C) 1998-2020 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/fr30.h" 26 27 /* Forward declarations. */ 28 static bfd_reloc_status_type 29 fr30_elf_i20_reloc (bfd *, arelent *, asymbol *, void * data, 30 asection *, bfd *, char **error_message); 31 static bfd_reloc_status_type 32 fr30_elf_i32_reloc (bfd *, arelent *, asymbol *, void *, 33 asection *, bfd *, char **); 34 35 static reloc_howto_type fr30_elf_howto_table [] = 36 { 37 /* This reloc does nothing. */ 38 HOWTO (R_FR30_NONE, /* type */ 39 0, /* rightshift */ 40 3, /* size (0 = byte, 1 = short, 2 = long) */ 41 0, /* bitsize */ 42 FALSE, /* pc_relative */ 43 0, /* bitpos */ 44 complain_overflow_dont, /* complain_on_overflow */ 45 bfd_elf_generic_reloc, /* special_function */ 46 "R_FR30_NONE", /* name */ 47 FALSE, /* partial_inplace */ 48 0, /* src_mask */ 49 0, /* dst_mask */ 50 FALSE), /* pcrel_offset */ 51 52 /* An 8 bit absolute relocation. */ 53 HOWTO (R_FR30_8, /* type */ 54 0, /* rightshift */ 55 1, /* size (0 = byte, 1 = short, 2 = long) */ 56 8, /* bitsize */ 57 FALSE, /* pc_relative */ 58 4, /* bitpos */ 59 complain_overflow_bitfield, /* complain_on_overflow */ 60 bfd_elf_generic_reloc, /* special_function */ 61 "R_FR30_8", /* name */ 62 FALSE, /* partial_inplace */ 63 0x0000, /* src_mask */ 64 0x0ff0, /* dst_mask */ 65 FALSE), /* pcrel_offset */ 66 67 /* A 20 bit absolute relocation. */ 68 HOWTO (R_FR30_20, /* type */ 69 0, /* rightshift */ 70 2, /* size (0 = byte, 1 = short, 2 = long) */ 71 20, /* bitsize */ 72 FALSE, /* pc_relative */ 73 0, /* bitpos */ 74 complain_overflow_bitfield, /* complain_on_overflow */ 75 fr30_elf_i20_reloc, /* special_function */ 76 "R_FR30_20", /* name */ 77 FALSE, /* partial_inplace */ 78 0x00000000, /* src_mask */ 79 0x00f0ffff, /* dst_mask */ 80 FALSE), /* pcrel_offset */ 81 82 /* A 32 bit absolute relocation. */ 83 HOWTO (R_FR30_32, /* type */ 84 0, /* rightshift */ 85 2, /* size (0 = byte, 1 = short, 2 = long) */ 86 32, /* bitsize */ 87 FALSE, /* pc_relative */ 88 0, /* bitpos */ 89 complain_overflow_bitfield, /* complain_on_overflow */ 90 bfd_elf_generic_reloc, /* special_function */ 91 "R_FR30_32", /* name */ 92 FALSE, /* partial_inplace */ 93 0x00000000, /* src_mask */ 94 0xffffffff, /* dst_mask */ 95 FALSE), /* pcrel_offset */ 96 97 /* A 32 bit into 48 bits absolute relocation. */ 98 HOWTO (R_FR30_48, /* type */ 99 0, /* rightshift */ 100 2, /* size (0 = byte, 1 = short, 2 = long) */ 101 32, /* bitsize */ 102 FALSE, /* pc_relative */ 103 0, /* bitpos */ 104 complain_overflow_bitfield, /* complain_on_overflow */ 105 fr30_elf_i32_reloc, /* special_function */ 106 "R_FR30_48", /* name */ 107 FALSE, /* partial_inplace */ 108 0x00000000, /* src_mask */ 109 0xffffffff, /* dst_mask */ 110 FALSE), /* pcrel_offset */ 111 112 /* A 6 bit absolute relocation. */ 113 HOWTO (R_FR30_6_IN_4, /* type */ 114 2, /* rightshift */ 115 1, /* size (0 = byte, 1 = short, 2 = long) */ 116 6, /* bitsize */ 117 FALSE, /* pc_relative */ 118 4, /* bitpos */ 119 complain_overflow_unsigned, /* complain_on_overflow */ 120 bfd_elf_generic_reloc, /* special_function */ 121 "R_FR30_6_IN_4", /* name */ 122 FALSE, /* partial_inplace */ 123 0x0000, /* src_mask */ 124 0x00f0, /* dst_mask */ 125 FALSE), /* pcrel_offset */ 126 127 /* An 8 bit absolute relocation. */ 128 HOWTO (R_FR30_8_IN_8, /* type */ 129 0, /* rightshift */ 130 1, /* size (0 = byte, 1 = short, 2 = long) */ 131 8, /* bitsize */ 132 FALSE, /* pc_relative */ 133 4, /* bitpos */ 134 complain_overflow_signed, /* complain_on_overflow */ 135 bfd_elf_generic_reloc,/* special_function */ 136 "R_FR30_8_IN_8", /* name */ 137 FALSE, /* partial_inplace */ 138 0x0000, /* src_mask */ 139 0x0ff0, /* dst_mask */ 140 FALSE), /* pcrel_offset */ 141 142 /* A 9 bit absolute relocation. */ 143 HOWTO (R_FR30_9_IN_8, /* type */ 144 1, /* rightshift */ 145 1, /* size (0 = byte, 1 = short, 2 = long) */ 146 9, /* bitsize */ 147 FALSE, /* pc_relative */ 148 4, /* bitpos */ 149 complain_overflow_signed, /* complain_on_overflow */ 150 bfd_elf_generic_reloc,/* special_function */ 151 "R_FR30_9_IN_8", /* name */ 152 FALSE, /* partial_inplace */ 153 0x0000, /* src_mask */ 154 0x0ff0, /* dst_mask */ 155 FALSE), /* pcrel_offset */ 156 157 /* A 10 bit absolute relocation. */ 158 HOWTO (R_FR30_10_IN_8, /* type */ 159 2, /* rightshift */ 160 1, /* size (0 = byte, 1 = short, 2 = long) */ 161 10, /* bitsize */ 162 FALSE, /* pc_relative */ 163 4, /* bitpos */ 164 complain_overflow_signed, /* complain_on_overflow */ 165 bfd_elf_generic_reloc,/* special_function */ 166 "R_FR30_10_IN_8", /* name */ 167 FALSE, /* partial_inplace */ 168 0x0000, /* src_mask */ 169 0x0ff0, /* dst_mask */ 170 FALSE), /* pcrel_offset */ 171 172 /* A PC relative 9 bit relocation, right shifted by 1. */ 173 HOWTO (R_FR30_9_PCREL, /* type */ 174 1, /* rightshift */ 175 1, /* size (0 = byte, 1 = short, 2 = long) */ 176 9, /* bitsize */ 177 TRUE, /* pc_relative */ 178 0, /* bitpos */ 179 complain_overflow_signed, /* complain_on_overflow */ 180 bfd_elf_generic_reloc, /* special_function */ 181 "R_FR30_9_PCREL", /* name */ 182 FALSE, /* partial_inplace */ 183 0x0000, /* src_mask */ 184 0x00ff, /* dst_mask */ 185 FALSE), /* pcrel_offset */ 186 187 /* A PC relative 12 bit relocation, right shifted by 1. */ 188 HOWTO (R_FR30_12_PCREL, /* type */ 189 1, /* rightshift */ 190 1, /* size (0 = byte, 1 = short, 2 = long) */ 191 12, /* bitsize */ 192 TRUE, /* pc_relative */ 193 0, /* bitpos */ 194 complain_overflow_signed, /* complain_on_overflow */ 195 bfd_elf_generic_reloc, /* special_function */ 196 "R_FR30_12_PCREL", /* name */ 197 FALSE, /* partial_inplace */ 198 0x0000, /* src_mask */ 199 0x07ff, /* dst_mask */ 200 FALSE), /* pcrel_offset */ 201 /* GNU extension to record C++ vtable hierarchy */ 202 HOWTO (R_FR30_GNU_VTINHERIT, /* type */ 203 0, /* rightshift */ 204 2, /* size (0 = byte, 1 = short, 2 = long) */ 205 0, /* bitsize */ 206 FALSE, /* pc_relative */ 207 0, /* bitpos */ 208 complain_overflow_dont, /* complain_on_overflow */ 209 NULL, /* special_function */ 210 "R_FR30_GNU_VTINHERIT", /* name */ 211 FALSE, /* partial_inplace */ 212 0, /* src_mask */ 213 0, /* dst_mask */ 214 FALSE), /* pcrel_offset */ 215 216 /* GNU extension to record C++ vtable member usage */ 217 HOWTO (R_FR30_GNU_VTENTRY, /* type */ 218 0, /* rightshift */ 219 2, /* size (0 = byte, 1 = short, 2 = long) */ 220 0, /* bitsize */ 221 FALSE, /* pc_relative */ 222 0, /* bitpos */ 223 complain_overflow_dont, /* complain_on_overflow */ 224 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 225 "R_FR30_GNU_VTENTRY", /* name */ 226 FALSE, /* partial_inplace */ 227 0, /* src_mask */ 228 0, /* dst_mask */ 229 FALSE), /* pcrel_offset */ 230 }; 231 232 /* Utility to actually perform an R_FR30_20 reloc. */ 234 235 static bfd_reloc_status_type 236 fr30_elf_i20_reloc (bfd *abfd, 237 arelent *reloc_entry, 238 asymbol *symbol, 239 void * data, 240 asection *input_section, 241 bfd *output_bfd, 242 char **error_message ATTRIBUTE_UNUSED) 243 { 244 bfd_vma relocation; 245 unsigned long x; 246 247 /* This part is from bfd_elf_generic_reloc. */ 248 if (output_bfd != (bfd *) NULL 249 && (symbol->flags & BSF_SECTION_SYM) == 0 250 && (! reloc_entry->howto->partial_inplace 251 || reloc_entry->addend == 0)) 252 { 253 reloc_entry->address += input_section->output_offset; 254 return bfd_reloc_ok; 255 } 256 257 if (output_bfd != NULL) 258 /* FIXME: See bfd_perform_relocation. Is this right? */ 259 return bfd_reloc_ok; 260 261 relocation = 262 symbol->value 263 + symbol->section->output_section->vma 264 + symbol->section->output_offset 265 + reloc_entry->addend; 266 267 if (relocation > (((bfd_vma) 1 << 20) - 1)) 268 return bfd_reloc_overflow; 269 270 x = bfd_get_32 (abfd, (char *) data + reloc_entry->address); 271 x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4); 272 bfd_put_32 (abfd, (bfd_vma) x, (char *) data + reloc_entry->address); 273 274 return bfd_reloc_ok; 275 } 276 277 /* Utility to actually perform a R_FR30_48 reloc. */ 279 280 static bfd_reloc_status_type 281 fr30_elf_i32_reloc (bfd *abfd, 282 arelent *reloc_entry, 283 asymbol *symbol, 284 void * data, 285 asection *input_section, 286 bfd *output_bfd, 287 char **error_message ATTRIBUTE_UNUSED) 288 { 289 bfd_vma relocation; 290 291 /* This part is from bfd_elf_generic_reloc. */ 292 if (output_bfd != (bfd *) NULL 293 && (symbol->flags & BSF_SECTION_SYM) == 0 294 && (! reloc_entry->howto->partial_inplace 295 || reloc_entry->addend == 0)) 296 { 297 reloc_entry->address += input_section->output_offset; 298 return bfd_reloc_ok; 299 } 300 301 if (output_bfd != NULL) 302 /* FIXME: See bfd_perform_relocation. Is this right? */ 303 return bfd_reloc_ok; 304 305 relocation = 306 symbol->value 307 + symbol->section->output_section->vma 308 + symbol->section->output_offset 309 + reloc_entry->addend; 310 311 bfd_put_32 (abfd, relocation, (char *) data + reloc_entry->address + 2); 312 313 return bfd_reloc_ok; 314 } 315 316 /* Map BFD reloc types to FR30 ELF reloc types. */ 318 319 struct fr30_reloc_map 320 { 321 bfd_reloc_code_real_type bfd_reloc_val; 322 unsigned int fr30_reloc_val; 323 }; 324 325 static const struct fr30_reloc_map fr30_reloc_map [] = 326 { 327 { BFD_RELOC_NONE, R_FR30_NONE }, 328 { BFD_RELOC_8, R_FR30_8 }, 329 { BFD_RELOC_FR30_20, R_FR30_20 }, 330 { BFD_RELOC_32, R_FR30_32 }, 331 { BFD_RELOC_FR30_48, R_FR30_48 }, 332 { BFD_RELOC_FR30_6_IN_4, R_FR30_6_IN_4 }, 333 { BFD_RELOC_FR30_8_IN_8, R_FR30_8_IN_8 }, 334 { BFD_RELOC_FR30_9_IN_8, R_FR30_9_IN_8 }, 335 { BFD_RELOC_FR30_10_IN_8, R_FR30_10_IN_8 }, 336 { BFD_RELOC_FR30_9_PCREL, R_FR30_9_PCREL }, 337 { BFD_RELOC_FR30_12_PCREL, R_FR30_12_PCREL }, 338 { BFD_RELOC_VTABLE_INHERIT, R_FR30_GNU_VTINHERIT }, 339 { BFD_RELOC_VTABLE_ENTRY, R_FR30_GNU_VTENTRY }, 340 }; 341 342 static reloc_howto_type * 343 fr30_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 344 bfd_reloc_code_real_type code) 345 { 346 unsigned int i; 347 348 for (i = sizeof (fr30_reloc_map) / sizeof (fr30_reloc_map[0]); 349 i--;) 350 if (fr30_reloc_map [i].bfd_reloc_val == code) 351 return & fr30_elf_howto_table [fr30_reloc_map[i].fr30_reloc_val]; 352 353 return NULL; 354 } 355 356 static reloc_howto_type * 357 fr30_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) 358 { 359 unsigned int i; 360 361 for (i = 0; 362 i < sizeof (fr30_elf_howto_table) / sizeof (fr30_elf_howto_table[0]); 363 i++) 364 if (fr30_elf_howto_table[i].name != NULL 365 && strcasecmp (fr30_elf_howto_table[i].name, r_name) == 0) 366 return &fr30_elf_howto_table[i]; 367 368 return NULL; 369 } 370 371 /* Set the howto pointer for an FR30 ELF reloc. */ 372 373 static bfd_boolean 374 fr30_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, 375 arelent *cache_ptr, 376 Elf_Internal_Rela *dst) 377 { 378 unsigned int r_type; 379 380 r_type = ELF32_R_TYPE (dst->r_info); 381 if (r_type >= (unsigned int) R_FR30_max) 382 { 383 /* xgettext:c-format */ 384 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 385 abfd, r_type); 386 bfd_set_error (bfd_error_bad_value); 387 return FALSE; 388 } 389 cache_ptr->howto = & fr30_elf_howto_table [r_type]; 390 return TRUE; 391 } 392 393 /* Perform a single relocation. By default we use the standard BFD 395 routines, but a few relocs, we have to do them ourselves. */ 396 397 static bfd_reloc_status_type 398 fr30_final_link_relocate (reloc_howto_type *howto, 399 bfd *input_bfd, 400 asection *input_section, 401 bfd_byte *contents, 402 Elf_Internal_Rela *rel, 403 bfd_vma relocation) 404 { 405 bfd_reloc_status_type r = bfd_reloc_ok; 406 bfd_vma x; 407 bfd_signed_vma srel; 408 409 switch (howto->type) 410 { 411 case R_FR30_20: 412 contents += rel->r_offset; 413 relocation += rel->r_addend; 414 415 if (relocation > ((1 << 20) - 1)) 416 return bfd_reloc_overflow; 417 418 x = bfd_get_32 (input_bfd, contents); 419 x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4); 420 bfd_put_32 (input_bfd, x, contents); 421 break; 422 423 case R_FR30_48: 424 contents += rel->r_offset + 2; 425 relocation += rel->r_addend; 426 bfd_put_32 (input_bfd, relocation, contents); 427 break; 428 429 case R_FR30_9_PCREL: 430 contents += rel->r_offset + 1; 431 srel = (bfd_signed_vma) relocation; 432 srel += rel->r_addend; 433 srel -= rel->r_offset; 434 srel -= 2; /* Branch instructions add 2 to the PC... */ 435 srel -= (input_section->output_section->vma + 436 input_section->output_offset); 437 438 if (srel & 1) 439 return bfd_reloc_outofrange; 440 if (srel > ((1 << 8) - 1) || (srel < - (1 << 8))) 441 return bfd_reloc_overflow; 442 443 bfd_put_8 (input_bfd, srel >> 1, contents); 444 break; 445 446 case R_FR30_12_PCREL: 447 contents += rel->r_offset; 448 srel = (bfd_signed_vma) relocation; 449 srel += rel->r_addend; 450 srel -= rel->r_offset; 451 srel -= 2; /* Branch instructions add 2 to the PC... */ 452 srel -= (input_section->output_section->vma + 453 input_section->output_offset); 454 455 if (srel & 1) 456 return bfd_reloc_outofrange; 457 if (srel > ((1 << 11) - 1) || (srel < - (1 << 11))) 458 return bfd_reloc_overflow; 459 460 x = bfd_get_16 (input_bfd, contents); 461 x = (x & 0xf800) | ((srel >> 1) & 0x7ff); 462 bfd_put_16 (input_bfd, x, contents); 463 break; 464 465 default: 466 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 467 contents, rel->r_offset, 468 relocation, rel->r_addend); 469 } 470 471 return r; 472 } 473 474 /* Relocate an FR30 ELF section. 476 477 The RELOCATE_SECTION function is called by the new ELF backend linker 478 to handle the relocations for a section. 479 480 The relocs are always passed as Rela structures; if the section 481 actually uses Rel structures, the r_addend field will always be 482 zero. 483 484 This function is responsible for adjusting the section contents as 485 necessary, and (if using Rela relocs and generating a relocatable 486 output file) adjusting the reloc addend as necessary. 487 488 This function does not have to worry about setting the reloc 489 address or the reloc symbol index. 490 491 LOCAL_SYMS is a pointer to the swapped in local symbols. 492 493 LOCAL_SECTIONS is an array giving the section in the input file 494 corresponding to the st_shndx field of each local symbol. 495 496 The global hash table entry for the global symbols can be found 497 via elf_sym_hashes (input_bfd). 498 499 When generating relocatable output, this function must handle 500 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 501 going to be the section symbol corresponding to the output 502 section, which means that the addend must be adjusted 503 accordingly. */ 504 505 static bfd_boolean 506 fr30_elf_relocate_section (bfd *output_bfd, 507 struct bfd_link_info *info, 508 bfd *input_bfd, 509 asection *input_section, 510 bfd_byte *contents, 511 Elf_Internal_Rela *relocs, 512 Elf_Internal_Sym *local_syms, 513 asection **local_sections) 514 { 515 Elf_Internal_Shdr *symtab_hdr; 516 struct elf_link_hash_entry **sym_hashes; 517 Elf_Internal_Rela *rel; 518 Elf_Internal_Rela *relend; 519 520 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; 521 sym_hashes = elf_sym_hashes (input_bfd); 522 relend = relocs + input_section->reloc_count; 523 524 for (rel = relocs; rel < relend; rel ++) 525 { 526 reloc_howto_type *howto; 527 unsigned long r_symndx; 528 Elf_Internal_Sym *sym; 529 asection *sec; 530 struct elf_link_hash_entry *h; 531 bfd_vma relocation; 532 bfd_reloc_status_type r; 533 const char *name; 534 int r_type; 535 536 r_type = ELF32_R_TYPE (rel->r_info); 537 538 if ( r_type == R_FR30_GNU_VTINHERIT 539 || r_type == R_FR30_GNU_VTENTRY) 540 continue; 541 542 r_symndx = ELF32_R_SYM (rel->r_info); 543 544 howto = fr30_elf_howto_table + ELF32_R_TYPE (rel->r_info); 545 h = NULL; 546 sym = NULL; 547 sec = NULL; 548 549 if (r_symndx < symtab_hdr->sh_info) 550 { 551 sym = local_syms + r_symndx; 552 sec = local_sections [r_symndx]; 553 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 554 555 name = bfd_elf_string_from_elf_section 556 (input_bfd, symtab_hdr->sh_link, sym->st_name); 557 name = name == NULL ? bfd_section_name (sec) : name; 558 } 559 else 560 { 561 bfd_boolean unresolved_reloc, warned, ignored; 562 563 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 564 r_symndx, symtab_hdr, sym_hashes, 565 h, sec, relocation, 566 unresolved_reloc, warned, ignored); 567 568 name = h->root.root.string; 569 } 570 571 if (sec != NULL && discarded_section (sec)) 572 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 573 rel, 1, relend, howto, 0, contents); 574 575 if (bfd_link_relocatable (info)) 576 continue; 577 578 r = fr30_final_link_relocate (howto, input_bfd, input_section, 579 contents, rel, relocation); 580 581 if (r != bfd_reloc_ok) 582 { 583 const char * msg = (const char *) NULL; 584 585 switch (r) 586 { 587 case bfd_reloc_overflow: 588 (*info->callbacks->reloc_overflow) 589 (info, (h ? &h->root : NULL), name, howto->name, 590 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 591 break; 592 593 case bfd_reloc_undefined: 594 (*info->callbacks->undefined_symbol) 595 (info, name, input_bfd, input_section, rel->r_offset, TRUE); 596 break; 597 598 case bfd_reloc_outofrange: 599 msg = _("internal error: out of range error"); 600 break; 601 602 case bfd_reloc_notsupported: 603 msg = _("internal error: unsupported relocation error"); 604 break; 605 606 case bfd_reloc_dangerous: 607 msg = _("internal error: dangerous relocation"); 608 break; 609 610 default: 611 msg = _("internal error: unknown error"); 612 break; 613 } 614 615 if (msg) 616 (*info->callbacks->warning) (info, msg, name, input_bfd, 617 input_section, rel->r_offset); 618 } 619 } 620 621 return TRUE; 622 } 623 624 /* Return the section that should be marked against GC for a given 626 relocation. */ 627 628 static asection * 629 fr30_elf_gc_mark_hook (asection *sec, 630 struct bfd_link_info *info, 631 Elf_Internal_Rela *rel, 632 struct elf_link_hash_entry *h, 633 Elf_Internal_Sym *sym) 634 { 635 if (h != NULL) 636 switch (ELF32_R_TYPE (rel->r_info)) 637 { 638 case R_FR30_GNU_VTINHERIT: 639 case R_FR30_GNU_VTENTRY: 640 return NULL; 641 } 642 643 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 644 } 645 646 /* Look through the relocs for a section during the first phase. 647 Since we don't do .gots or .plts, we just need to consider the 648 virtual table relocs for gc. */ 649 650 static bfd_boolean 651 fr30_elf_check_relocs (bfd *abfd, 652 struct bfd_link_info *info, 653 asection *sec, 654 const Elf_Internal_Rela *relocs) 655 { 656 Elf_Internal_Shdr *symtab_hdr; 657 struct elf_link_hash_entry **sym_hashes; 658 const Elf_Internal_Rela *rel; 659 const Elf_Internal_Rela *rel_end; 660 661 if (bfd_link_relocatable (info)) 662 return TRUE; 663 664 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 665 sym_hashes = elf_sym_hashes (abfd); 666 667 rel_end = relocs + sec->reloc_count; 668 for (rel = relocs; rel < rel_end; rel++) 669 { 670 struct elf_link_hash_entry *h; 671 unsigned long r_symndx; 672 673 r_symndx = ELF32_R_SYM (rel->r_info); 674 if (r_symndx < symtab_hdr->sh_info) 675 h = NULL; 676 else 677 { 678 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 679 while (h->root.type == bfd_link_hash_indirect 680 || h->root.type == bfd_link_hash_warning) 681 h = (struct elf_link_hash_entry *) h->root.u.i.link; 682 } 683 684 switch (ELF32_R_TYPE (rel->r_info)) 685 { 686 /* This relocation describes the C++ object vtable hierarchy. 687 Reconstruct it for later use during GC. */ 688 case R_FR30_GNU_VTINHERIT: 689 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 690 return FALSE; 691 break; 692 693 /* This relocation describes which C++ vtable entries are actually 694 used. Record for later use during GC. */ 695 case R_FR30_GNU_VTENTRY: 696 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 697 return FALSE; 698 break; 699 } 700 } 701 702 return TRUE; 703 } 704 705 #define ELF_ARCH bfd_arch_fr30 707 #define ELF_MACHINE_CODE EM_FR30 708 #define ELF_MACHINE_ALT1 EM_CYGNUS_FR30 709 #define ELF_MAXPAGESIZE 0x1000 710 711 #define TARGET_BIG_SYM fr30_elf32_vec 712 #define TARGET_BIG_NAME "elf32-fr30" 713 714 #define elf_info_to_howto_rel NULL 715 #define elf_info_to_howto fr30_info_to_howto_rela 716 #define elf_backend_relocate_section fr30_elf_relocate_section 717 #define elf_backend_gc_mark_hook fr30_elf_gc_mark_hook 718 #define elf_backend_check_relocs fr30_elf_check_relocs 719 720 #define elf_backend_can_gc_sections 1 721 #define elf_backend_rela_normal 1 722 723 #define bfd_elf32_bfd_reloc_type_lookup fr30_reloc_type_lookup 724 #define bfd_elf32_bfd_reloc_name_lookup fr30_reloc_name_lookup 725 726 #include "elf32-target.h" 727
Indexes created Wed Mar 25 00:23:37 UTC 2026