1/* Visium-specific support for 32-bit ELF. 2 3 Copyright (C) 2003-2024 Free Software Foundation, Inc. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, 20 Boston, MA 02110-1301, USA. */ 21 22#include "sysdep.h" 23#include "bfd.h" 24#include "sysdep.h" 25#include "libbfd.h" 26#include "elf-bfd.h" 27#include "elf/visium.h" 28#include "libiberty.h" 29 30static bfd_reloc_status_type visium_elf_howto_parity_reloc 31 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 32 33static reloc_howto_type visium_elf_howto_table[] = { 34 /* This reloc does nothing. */ 35 HOWTO (R_VISIUM_NONE, /* type */ 36 0, /* rightshift */ 37 0, /* size */ 38 0, /* bitsize */ 39 false, /* pc_relative */ 40 0, /* bitpos */ 41 complain_overflow_dont, /* complain_on_overflow */ 42 bfd_elf_generic_reloc, /* special_function */ 43 "R_VISIUM_NONE", /* name */ 44 false, /* partial_inplace */ 45 0, /* src_mask */ 46 0, /* dst_mask */ 47 false), /* pcrel_offset */ 48 49 /* A 8 bit absolute relocation. */ 50 HOWTO (R_VISIUM_8, /* type */ 51 0, /* rightshift */ 52 1, /* size */ 53 8, /* bitsize */ 54 false, /* pc_relative */ 55 0, /* bitpos */ 56 complain_overflow_bitfield, /* complain_on_overflow */ 57 bfd_elf_generic_reloc, /* special_function */ 58 "R_VISIUM_8", /* name */ 59 false, /* partial_inplace */ 60 0x00, /* src_mask */ 61 0xff, /* dst_mask */ 62 false), /* pcrel_offset */ 63 64 /* A 16 bit absolute relocation. */ 65 HOWTO (R_VISIUM_16, /* type */ 66 0, /* rightshift */ 67 2, /* size */ 68 16, /* bitsize */ 69 false, /* pc_relative */ 70 0, /* bitpos */ 71 complain_overflow_bitfield, /* complain_on_overflow */ 72 bfd_elf_generic_reloc, /* special_function */ 73 "R_VISIUM_16", /* name */ 74 false, /* partial_inplace */ 75 0x0000, /* src_mask */ 76 0xffff, /* dst_mask */ 77 false), /* pcrel_offset */ 78 79 /* A 32 bit absolute relocation. */ 80 HOWTO (R_VISIUM_32, /* type */ 81 0, /* rightshift */ 82 4, /* size */ 83 32, /* bitsize */ 84 false, /* pc_relative */ 85 0, /* bitpos */ 86 complain_overflow_bitfield, /* complain_on_overflow */ 87 bfd_elf_generic_reloc, /* special_function */ 88 "R_VISIUM_32", /* name */ 89 false, /* partial_inplace */ 90 0x00000000, /* src_mask */ 91 0xffffffff, /* dst_mask */ 92 false), /* pcrel_offset */ 93 94 95 /* A 8 bit PC relative relocation. */ 96 HOWTO (R_VISIUM_8_PCREL, /* type */ 97 0, /* rightshift */ 98 1, /* size */ 99 8, /* bitsize */ 100 true, /* pc_relative */ 101 0, /* bitpos */ 102 complain_overflow_bitfield, /* complain_on_overflow */ 103 bfd_elf_generic_reloc, /* special_function */ 104 "R_VISIUM_8_PCREL", /* name */ 105 false, /* partial_inplace */ 106 0x00, /* src_mask */ 107 0xff, /* dst_mask */ 108 true), /* pcrel_offset */ 109 110 /* A 16 bit PC relative relocation. */ 111 HOWTO (R_VISIUM_16_PCREL, /* type */ 112 0, /* rightshift */ 113 2, /* size */ 114 16, /* bitsize */ 115 true, /* pc_relative */ 116 0, /* bitpos */ 117 complain_overflow_bitfield, /* complain_on_overflow */ 118 bfd_elf_generic_reloc, /* special_function */ 119 "R_VISIUM_16_PCREL", /* name */ 120 false, /* partial inplace */ 121 0x0000, /* src_mask */ 122 0xffff, /* dst_mask */ 123 true), /* pcrel_offset */ 124 125 /* A 32-bit PC relative relocation. */ 126 HOWTO (R_VISIUM_32_PCREL, /* type */ 127 0, /* rightshift */ 128 4, /* size */ 129 32, /* bitsize */ 130 true, /* pc_relative */ 131 0, /* bitpos */ 132 complain_overflow_bitfield, /* complain_on_overflow */ 133 bfd_elf_generic_reloc, /* special_function */ 134 "R_VISIUM_32_PCREL", /* name */ 135 false, /* partial_inplace */ 136 0, /* src_mask */ 137 0xffffffff, /* dst_mask */ 138 true), /* pcrel_offset */ 139 140 /* A 16-bit PC word relative offset, relative to start of instruction 141 and always in the second half of the instruction. */ 142 HOWTO (R_VISIUM_PC16, /* type */ 143 2, /* rightshift */ 144 4, /* size */ 145 16, /* bitsize */ 146 true, /* pc_relative */ 147 0, /* bitpos */ 148 complain_overflow_signed, /* complain_on_overflow */ 149 visium_elf_howto_parity_reloc, /* special_function */ 150 "R_VISIUM_PC16", /* name */ 151 false, /* partial_inplace */ 152 0x00000000, /* src_mask */ 153 0x0000ffff, /* dst_mask */ 154 true), /* pcrel_offset */ 155 156 /* The high 16 bits of symbol value. */ 157 HOWTO (R_VISIUM_HI16, /* type */ 158 16, /* rightshift */ 159 4, /* size */ 160 16, /* bitsize */ 161 false, /* pc_relative */ 162 0, /* bitpos */ 163 complain_overflow_dont, /* complain_on_overflow */ 164 visium_elf_howto_parity_reloc, /* special_function */ 165 "R_VISIUM_HI16", /* name */ 166 false, /* partial_inplace */ 167 0x00000000, /* src_mask */ 168 0x0000ffff, /* dst_mask */ 169 false), /* pcrel_offset */ 170 171 /* The low 16 bits of symbol value. */ 172 HOWTO (R_VISIUM_LO16, /* type */ 173 0, /* rightshift */ 174 4, /* size */ 175 16, /* bitsize */ 176 false, /* pc_relative */ 177 0, /* bitpos */ 178 complain_overflow_dont, /* complain_on_overflow */ 179 visium_elf_howto_parity_reloc, /* special_function */ 180 "R_VISIUM_LO16", /* name */ 181 false, /* partial_inplace */ 182 0x00000000, /* src_mask */ 183 0x0000ffff, /* dst_mask */ 184 false), /* pcrel_offset */ 185 186 /* A 16 bit immediate value. */ 187 HOWTO (R_VISIUM_IM16, /* type */ 188 0, /* rightshift */ 189 4, /* size */ 190 16, /* bitsize */ 191 false, /* pc_relative */ 192 0, /* bitpos */ 193 complain_overflow_unsigned, /* complain_on_overflow */ 194 visium_elf_howto_parity_reloc, /* special_function */ 195 "R_VISIUM_IM16", /* name */ 196 false, /* partial_inplace */ 197 0x0000000, /* src_mask */ 198 0x000ffff, /* dst_mask */ 199 false), /* pcrel_offset */ 200 201 /* The high 16 bits of symbol value, pc relative. */ 202 HOWTO (R_VISIUM_HI16_PCREL, /* type */ 203 16, /* rightshift */ 204 4, /* size */ 205 16, /* bitsize */ 206 true, /* pc_relative */ 207 0, /* bitpos */ 208 complain_overflow_dont, /* complain_on_overflow */ 209 visium_elf_howto_parity_reloc, /* special_function */ 210 "R_VISIUM_HI16_PCREL", /* name */ 211 false, /* partial_inplace */ 212 0x00000000, /* src_mask */ 213 0x0000ffff, /* dst_mask */ 214 true), /* pcrel_offset */ 215 216 /* The low 16 bits of symbol value, pc relative. */ 217 HOWTO (R_VISIUM_LO16_PCREL, /* type */ 218 0, /* rightshift */ 219 4, /* size */ 220 16, /* bitsize */ 221 true, /* pc_relative */ 222 0, /* bitpos */ 223 complain_overflow_dont, /* complain_on_overflow */ 224 visium_elf_howto_parity_reloc, /* special_function */ 225 "R_VISIUM_LO16_PCREL", /* name */ 226 false, /* partial_inplace */ 227 0x00000000, /* src_mask */ 228 0x0000ffff, /* dst_mask */ 229 true), /* pcrel_offset */ 230 231 /* A 16 bit immediate value, pc relative. */ 232 HOWTO (R_VISIUM_IM16_PCREL, /* type */ 233 0, /* rightshift */ 234 4, /* size */ 235 16, /* bitsize */ 236 true, /* pc_relative */ 237 0, /* bitpos */ 238 complain_overflow_unsigned, /* complain_on_overflow */ 239 visium_elf_howto_parity_reloc, /* special_function */ 240 "R_VISIUM_IM16_PCREL", /* name */ 241 false, /* partial_inplace */ 242 0x0000000, /* src_mask */ 243 0x000ffff, /* dst_mask */ 244 true), /* pcrel_offset */ 245 246}; 247 248/* GNU extension to record C++ vtable hierarchy. */ 249static reloc_howto_type visium_elf_vtinherit_howto = 250 HOWTO (R_VISIUM_GNU_VTINHERIT, /* type */ 251 0, /* rightshift */ 252 4, /* size */ 253 0, /* bitsize */ 254 false, /* pc_relative */ 255 0, /* bitpos */ 256 complain_overflow_dont, /* complain_on_overflow */ 257 NULL, /* special_function */ 258 "R_VISIUM_GNU_VTINHERIT", /* name */ 259 false, /* partial_inplace */ 260 0, /* src_mask */ 261 0, /* dst_mask */ 262 false); /* pcrel_offset */ 263 264/* GNU extension to record C++ vtable member usage. */ 265static reloc_howto_type visium_elf_vtentry_howto = 266 HOWTO (R_VISIUM_GNU_VTENTRY, /* type */ 267 0, /* rightshift */ 268 4, /* size */ 269 0, /* bitsize */ 270 false, /* pc_relative */ 271 0, /* bitpos */ 272 complain_overflow_dont, /* complain_on_overflow */ 273 NULL, /* special_function */ 274 "R_VISIUM_GNU_VTENTRY", /* name */ 275 false, /* partial_inplace */ 276 0, /* src_mask */ 277 0, /* dst_mask */ 278 false); /* pcrel_offset */ 279 280/* Return the parity bit for INSN shifted to its final position. */ 281 282static bfd_vma 283visium_parity_bit (bfd_vma insn) 284{ 285 bfd_vma p = 0; 286 int i; 287 288 for (i = 0; i < 31; i++) 289 { 290 p ^= (insn & 1); 291 insn >>= 1; 292 } 293 294 return p << 31; 295} 296 297/* This "special function" will only be used when the input and 298 output files have different formats ie. when generating S-records 299 directly using "--oformat srec". Otherwise we use 300 _bfd_final_link_relocate which uses a howto structure, but does 301 not use the special_function field. 302 303 It sets instruction parity to even. This cannot be done by a howto. */ 304 305static bfd_reloc_status_type 306visium_elf_howto_parity_reloc (bfd * input_bfd, arelent *reloc_entry, 307 asymbol *symbol, void *data, 308 asection *input_section, bfd *output_bfd, 309 char **error_message ATTRIBUTE_UNUSED) 310{ 311 bfd_reloc_status_type ret; 312 bfd_vma relocation; 313 bfd_byte *inplace_address; 314 bfd_vma insn; 315 316 /* This part is from bfd_elf_generic_reloc. 317 If we're relocating, and this an external symbol, we don't want 318 to change anything. */ 319 if (output_bfd != (bfd *) NULL && (symbol->flags & BSF_SECTION_SYM) == 0) 320 { 321 reloc_entry->address += input_section->output_offset; 322 return bfd_reloc_ok; 323 } 324 325 /* Now do the reloc in the usual way. */ 326 327 /* Sanity check the address (offset in section). */ 328 if (reloc_entry->address > bfd_get_section_limit (input_bfd, input_section)) 329 return bfd_reloc_outofrange; 330 331 ret = bfd_reloc_ok; 332 if (bfd_is_und_section (symbol->section) && output_bfd == (bfd *) NULL) 333 ret = bfd_reloc_undefined; 334 335 if (bfd_is_com_section (symbol->section) || output_bfd != (bfd *) NULL) 336 relocation = 0; 337 else 338 relocation = symbol->value; 339 340 /* Only do this for a final link. */ 341 if (output_bfd == (bfd *) NULL) 342 { 343 relocation += symbol->section->output_section->vma; 344 relocation += symbol->section->output_offset; 345 } 346 347 relocation += reloc_entry->addend; 348 inplace_address = (bfd_byte *) data + reloc_entry->address; 349 insn = bfd_get_32 (input_bfd, inplace_address); 350 351 if (reloc_entry->howto->pc_relative) 352 { 353 relocation -= input_section->output_section->vma; 354 relocation -= input_section->output_offset; 355 relocation -= reloc_entry->address; 356 } 357 358 switch (reloc_entry->howto->type) 359 { 360 case R_VISIUM_PC16: 361 if (ret == bfd_reloc_ok 362 && ((bfd_signed_vma) relocation < -0x20000 363 || (bfd_signed_vma) relocation > 0x1ffff)) 364 ret = bfd_reloc_overflow; 365 relocation = (relocation >> 2) & 0xffff; 366 break; 367 case R_VISIUM_HI16: 368 case R_VISIUM_HI16_PCREL: 369 relocation = (relocation >> 16) & 0xffff; 370 break; 371 case R_VISIUM_LO16: 372 case R_VISIUM_LO16_PCREL: 373 relocation &= 0xffff; 374 break; 375 case R_VISIUM_IM16: 376 case R_VISIUM_IM16_PCREL: 377 if (ret == bfd_reloc_ok && (relocation & 0xffff0000) != 0) 378 ret = bfd_reloc_overflow; 379 relocation &= 0xffff; 380 break; 381 } 382 insn = (insn & 0x7fff0000) | relocation; 383 insn |= visium_parity_bit (insn); 384 bfd_put_32 (input_bfd, insn, inplace_address); 385 386 if (output_bfd != (bfd *) NULL) 387 reloc_entry->address += input_section->output_offset; 388 389 return ret; 390} 391 392static reloc_howto_type * 393visium_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 394 bfd_reloc_code_real_type code) 395{ 396 /* Note that the visium_elf_howto_table is indexed by the R_ 397 constants. Thus, the order that the howto records appear in the 398 table *must* match the order of the relocation types defined in 399 include/elf/visium.h. */ 400 switch (code) 401 { 402 case BFD_RELOC_NONE: 403 return &visium_elf_howto_table[(int) R_VISIUM_NONE]; 404 case BFD_RELOC_8: 405 return &visium_elf_howto_table[(int) R_VISIUM_8]; 406 case BFD_RELOC_16: 407 return &visium_elf_howto_table[(int) R_VISIUM_16]; 408 case BFD_RELOC_32: 409 return &visium_elf_howto_table[(int) R_VISIUM_32]; 410 case BFD_RELOC_8_PCREL: 411 return &visium_elf_howto_table[(int) R_VISIUM_8_PCREL]; 412 case BFD_RELOC_16_PCREL: 413 return &visium_elf_howto_table[(int) R_VISIUM_16_PCREL]; 414 case BFD_RELOC_32_PCREL: 415 return &visium_elf_howto_table[(int) R_VISIUM_32_PCREL]; 416 case BFD_RELOC_VISIUM_REL16: 417 return &visium_elf_howto_table[(int) R_VISIUM_PC16]; 418 case BFD_RELOC_VISIUM_HI16: 419 return &visium_elf_howto_table[(int) R_VISIUM_HI16]; 420 case BFD_RELOC_VISIUM_LO16: 421 return &visium_elf_howto_table[(int) R_VISIUM_LO16]; 422 case BFD_RELOC_VISIUM_IM16: 423 return &visium_elf_howto_table[(int) R_VISIUM_IM16]; 424 case BFD_RELOC_VISIUM_HI16_PCREL: 425 return &visium_elf_howto_table[(int) R_VISIUM_HI16_PCREL]; 426 case BFD_RELOC_VISIUM_LO16_PCREL: 427 return &visium_elf_howto_table[(int) R_VISIUM_LO16_PCREL]; 428 case BFD_RELOC_VISIUM_IM16_PCREL: 429 return &visium_elf_howto_table[(int) R_VISIUM_IM16_PCREL]; 430 case BFD_RELOC_VTABLE_INHERIT: 431 return &visium_elf_vtinherit_howto; 432 case BFD_RELOC_VTABLE_ENTRY: 433 return &visium_elf_vtentry_howto; 434 default: 435 return NULL; 436 } 437} 438 439static reloc_howto_type * 440visium_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) 441{ 442 unsigned int i; 443 444 for (i = 0; 445 i < (sizeof (visium_elf_howto_table) 446 / sizeof (visium_elf_howto_table[0])); i++) 447 if (visium_elf_howto_table[i].name != NULL 448 && strcasecmp (visium_elf_howto_table[i].name, r_name) == 0) 449 return &visium_elf_howto_table[i]; 450 451 if (strcasecmp (visium_elf_vtinherit_howto.name, r_name) == 0) 452 return &visium_elf_vtinherit_howto; 453 if (strcasecmp (visium_elf_vtentry_howto.name, r_name) == 0) 454 return &visium_elf_vtentry_howto; 455 456 return NULL; 457} 458 459/* Set the howto pointer for a VISIUM ELF reloc. */ 460 461static bool 462visium_info_to_howto_rela (bfd *abfd, arelent *cache_ptr, 463 Elf_Internal_Rela *dst) 464{ 465 unsigned int r_type = ELF32_R_TYPE (dst->r_info); 466 467 switch (r_type) 468 { 469 case R_VISIUM_GNU_VTINHERIT: 470 cache_ptr->howto = &visium_elf_vtinherit_howto; 471 break; 472 473 case R_VISIUM_GNU_VTENTRY: 474 cache_ptr->howto = &visium_elf_vtentry_howto; 475 break; 476 477 default: 478 if (r_type >= ARRAY_SIZE (visium_elf_howto_table)) 479 { 480 /* xgettext:c-format */ 481 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 482 abfd, r_type); 483 bfd_set_error (bfd_error_bad_value); 484 return false; 485 } 486 cache_ptr->howto = &visium_elf_howto_table[r_type]; 487 break; 488 } 489 return true; 490} 491 492/* Look through the relocs for a section during the first phase. 493 Since we don't do .gots or .plts, we just need to consider the 494 virtual table relocs for gc. */ 495 496static bool 497visium_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, 498 asection *sec, const Elf_Internal_Rela *relocs) 499{ 500 Elf_Internal_Shdr *symtab_hdr; 501 struct elf_link_hash_entry **sym_hashes; 502 const Elf_Internal_Rela *rel; 503 const Elf_Internal_Rela *rel_end; 504 505 if (bfd_link_relocatable (info)) 506 return true; 507 508 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 509 sym_hashes = elf_sym_hashes (abfd); 510 511 rel_end = relocs + sec->reloc_count; 512 for (rel = relocs; rel < rel_end; rel++) 513 { 514 struct elf_link_hash_entry *h; 515 unsigned long r_symndx; 516 517 r_symndx = ELF32_R_SYM (rel->r_info); 518 if (r_symndx < symtab_hdr->sh_info) 519 h = NULL; 520 else 521 { 522 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 523 while (h->root.type == bfd_link_hash_indirect 524 || h->root.type == bfd_link_hash_warning) 525 h = (struct elf_link_hash_entry *) h->root.u.i.link; 526 } 527 528 switch (ELF32_R_TYPE (rel->r_info)) 529 { 530 /* This relocation describes the C++ object vtable hierarchy. 531 Reconstruct it for later use during GC. */ 532 case R_VISIUM_GNU_VTINHERIT: 533 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 534 return false; 535 break; 536 537 /* This relocation describes which C++ vtable entries are actually 538 used. Record for later use during GC. */ 539 case R_VISIUM_GNU_VTENTRY: 540 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 541 return false; 542 break; 543 } 544 } 545 546 return true; 547} 548 549/* Relocate a VISIUM ELF section. */ 550 551static int 552visium_elf_relocate_section (bfd *output_bfd, 553 struct bfd_link_info *info, bfd *input_bfd, 554 asection *input_section, bfd_byte *contents, 555 Elf_Internal_Rela *relocs, 556 Elf_Internal_Sym *local_syms, 557 asection **local_sections) 558{ 559 Elf_Internal_Shdr *symtab_hdr; 560 struct elf_link_hash_entry **sym_hashes; 561 Elf_Internal_Rela *rel; 562 Elf_Internal_Rela *relend; 563 564 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 565 sym_hashes = elf_sym_hashes (input_bfd); 566 relend = relocs + input_section->reloc_count; 567 568 for (rel = relocs; rel < relend; rel++) 569 { 570 reloc_howto_type *howto; 571 unsigned long r_symndx; 572 Elf_Internal_Sym *sym; 573 asection *sec; 574 struct elf_link_hash_entry *h; 575 bfd_vma relocation; 576 bfd_reloc_status_type r; 577 const char *name = NULL; 578 int r_type; 579 bfd_vma insn; 580 581 r_type = ELF32_R_TYPE (rel->r_info); 582 583 if (r_type == R_VISIUM_GNU_VTINHERIT || r_type == R_VISIUM_GNU_VTENTRY) 584 continue; 585 586 r_symndx = ELF32_R_SYM (rel->r_info); 587 588 howto = visium_elf_howto_table + ELF32_R_TYPE (rel->r_info); 589 h = NULL; 590 sym = NULL; 591 sec = NULL; 592 593 if (r_symndx < symtab_hdr->sh_info) 594 { 595 /* This is a local symbol. */ 596 sym = local_syms + r_symndx; 597 sec = local_sections[r_symndx]; 598 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 599 600 name = bfd_elf_string_from_elf_section 601 (input_bfd, symtab_hdr->sh_link, sym->st_name); 602 name = name == NULL ? bfd_section_name (sec) : name; 603 } 604 else 605 { 606 bool unresolved_reloc; 607 bool warned, ignored; 608 609 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 610 r_symndx, symtab_hdr, sym_hashes, 611 h, sec, relocation, 612 unresolved_reloc, warned, ignored); 613 614 name = h->root.root.string; 615 } 616 617 if (sec != NULL && discarded_section (sec)) 618 { 619 /* For relocs against symbols from removed linkonce sections, 620 or sections discarded by a linker script, we just want the 621 section contents zeroed. Avoid any special processing. */ 622 _bfd_clear_contents (howto, input_bfd, input_section, 623 contents, rel->r_offset); 624 625 rel->r_info = 0; 626 rel->r_addend = 0; 627 continue; 628 } 629 630 if (bfd_link_relocatable (info)) 631 continue; 632 633 switch (r_type) 634 { 635 case R_VISIUM_PC16: 636 case R_VISIUM_HI16: 637 case R_VISIUM_LO16: 638 case R_VISIUM_IM16: 639 case R_VISIUM_HI16_PCREL: 640 case R_VISIUM_LO16_PCREL: 641 case R_VISIUM_IM16_PCREL: 642 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 643 contents, rel->r_offset, 644 relocation, rel->r_addend); 645 646 /* For instruction relocations, the parity needs correcting. */ 647 if (r == bfd_reloc_ok) 648 { 649 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 650 insn = (insn & 0x7fffffff) | visium_parity_bit (insn); 651 bfd_put_32 (input_bfd, insn, contents + rel->r_offset); 652 } 653 break; 654 655 default: 656 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 657 contents, rel->r_offset, 658 relocation, rel->r_addend); 659 break; 660 } 661 662 if (r != bfd_reloc_ok) 663 { 664 const char *msg = (const char *) NULL; 665 666 switch (r) 667 { 668 case bfd_reloc_overflow: 669 (*info->callbacks->reloc_overflow) 670 (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0, 671 input_bfd, input_section, rel->r_offset); 672 break; 673 674 case bfd_reloc_undefined: 675 (*info->callbacks->undefined_symbol) 676 (info, name, input_bfd, input_section, rel->r_offset, true); 677 break; 678 679 case bfd_reloc_outofrange: 680 msg = _("internal error: out of range error"); 681 break; 682 683 case bfd_reloc_notsupported: 684 msg = _("internal error: unsupported relocation error"); 685 break; 686 687 case bfd_reloc_dangerous: 688 msg = _("internal error: dangerous relocation"); 689 break; 690 691 default: 692 msg = _("internal error: unknown error"); 693 break; 694 } 695 696 if (msg) 697 (*info->callbacks->warning) (info, msg, name, input_bfd, 698 input_section, rel->r_offset); 699 } 700 } 701 702 return true; 703} 704 705/* This function is called during section gc to discover the section a 706 to which a particular relocation refers. Return the section that 707 should be marked against GC for a given relocation. */ 708 709static asection * 710visium_elf_gc_mark_hook (asection *sec, struct bfd_link_info *info, 711 Elf_Internal_Rela *rel, struct elf_link_hash_entry *h, 712 Elf_Internal_Sym *sym) 713{ 714 if (h != NULL) 715 switch (ELF32_R_TYPE (rel->r_info)) 716 { 717 case R_VISIUM_GNU_VTINHERIT: 718 case R_VISIUM_GNU_VTENTRY: 719 return NULL; 720 } 721 722 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 723} 724 725static bool 726visium_elf_init_file_header (bfd *abfd, struct bfd_link_info *info) 727{ 728 Elf_Internal_Ehdr *i_ehdrp; 729 730 if (!_bfd_elf_init_file_header (abfd, info)) 731 return false; 732 733 i_ehdrp = elf_elfheader (abfd); 734 i_ehdrp->e_ident[EI_ABIVERSION] = 1; 735 return true; 736} 737 738/* Function to set the ELF flag bits. */ 739 740static bool 741visium_elf_set_private_flags (bfd *abfd, flagword flags) 742{ 743 elf_elfheader (abfd)->e_flags = flags; 744 elf_flags_init (abfd) = true; 745 return true; 746} 747 748/* Copy backend specific data from one object module to another. */ 749 750static bool 751visium_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) 752{ 753 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 754 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 755 return true; 756 757 BFD_ASSERT (!elf_flags_init (obfd) 758 || elf_elfheader (obfd)->e_flags == 759 elf_elfheader (ibfd)->e_flags); 760 761 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; 762 elf_flags_init (obfd) = true; 763 764 /* Copy object attributes. */ 765 _bfd_elf_copy_obj_attributes (ibfd, obfd); 766 767 return true; 768} 769 770/* Merge backend specific data from an object 771 file to the output object file when linking. */ 772 773static bool 774visium_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 775{ 776 bfd *obfd = info->output_bfd; 777 flagword old_flags; 778 flagword new_flags; 779 flagword mismatch; 780 const char *opt_arch = NULL; 781 const char *new_opt_with = NULL; 782 const char *old_opt_with = NULL; 783 const char *with = "with"; 784 const char *without = "without"; 785 const char *mcm = "mcm"; 786 const char *mcm24 = "mcm24"; 787 const char *gr6 = "gr6"; 788 789 new_flags = elf_elfheader (ibfd)->e_flags; 790 old_flags = elf_elfheader (obfd)->e_flags; 791 792 if (!elf_flags_init (obfd)) 793 { 794 /* First call, no flags set. */ 795 elf_flags_init (obfd) = true; 796 elf_elfheader (obfd)->e_flags = new_flags; 797 } 798 else 799 { 800 mismatch = (new_flags ^ old_flags) 801 & (EF_VISIUM_ARCH_MCM | EF_VISIUM_ARCH_MCM24 | EF_VISIUM_ARCH_GR6); 802 if (mismatch & EF_VISIUM_ARCH_GR6) 803 { 804 opt_arch = gr6; 805 new_opt_with = new_flags & EF_VISIUM_ARCH_GR6 ? with : without; 806 old_opt_with = old_flags & EF_VISIUM_ARCH_GR6 ? with : without; 807 } 808 else if (mismatch & EF_VISIUM_ARCH_MCM) 809 { 810 opt_arch = mcm; 811 new_opt_with = new_flags & EF_VISIUM_ARCH_MCM ? with : without; 812 old_opt_with = old_flags & EF_VISIUM_ARCH_MCM ? with : without; 813 } 814 else if (mismatch & EF_VISIUM_ARCH_MCM24) 815 { 816 opt_arch = mcm24; 817 new_opt_with = new_flags & EF_VISIUM_ARCH_MCM24 ? with : without; 818 old_opt_with = old_flags & EF_VISIUM_ARCH_MCM24 ? with : without; 819 } 820 821 if (mismatch) 822 _bfd_error_handler 823 /* xgettext:c-format */ 824 (_("%pB: compiled %s -mtune=%s and linked with modules" 825 " compiled %s -mtune=%s"), 826 ibfd, new_opt_with, opt_arch, old_opt_with, opt_arch); 827 } 828 829 return true; 830} 831 832static bool 833visium_elf_print_private_bfd_data (bfd *abfd, void *ptr) 834{ 835 FILE *file = (FILE *) ptr; 836 flagword flags; 837 838 BFD_ASSERT (abfd != NULL && ptr != NULL); 839 840 /* Print normal ELF private data. */ 841 _bfd_elf_print_private_bfd_data (abfd, ptr); 842 843 flags = elf_elfheader (abfd)->e_flags; 844 fprintf (file, _("private flags = 0x%lx:"), (long) flags); 845 846 if (flags & EF_VISIUM_ARCH_GR6) 847 fprintf (file, " -mtune=gr6"); 848 else if (flags & EF_VISIUM_ARCH_MCM) 849 fprintf (file, " -mtune=mcm"); 850 else if (flags & EF_VISIUM_ARCH_MCM24) 851 fprintf (file, " -mtune=mcm24"); 852 853 fputc ('\n', file); 854 return true; 855} 856 857#define ELF_ARCH bfd_arch_visium 858#define ELF_MACHINE_CODE EM_VISIUM 859#define ELF_OSABI ELFOSABI_STANDALONE 860#define ELF_MAXPAGESIZE 1 861 862#define TARGET_BIG_SYM visium_elf32_vec 863#define TARGET_BIG_NAME "elf32-visium" 864 865#define elf_info_to_howto_rel NULL 866#define elf_info_to_howto visium_info_to_howto_rela 867#define elf_backend_relocate_section visium_elf_relocate_section 868#define elf_backend_gc_mark_hook visium_elf_gc_mark_hook 869#define elf_backend_check_relocs visium_elf_check_relocs 870#define elf_backend_rela_normal 1 871 872#define elf_backend_can_gc_sections 1 873 874#define bfd_elf32_bfd_reloc_type_lookup visium_reloc_type_lookup 875#define bfd_elf32_bfd_reloc_name_lookup visium_reloc_name_lookup 876 877#define bfd_elf32_bfd_set_private_flags visium_elf_set_private_flags 878#define bfd_elf32_bfd_copy_private_bfd_data visium_elf_copy_private_bfd_data 879#define bfd_elf32_bfd_merge_private_bfd_data visium_elf_merge_private_bfd_data 880#define bfd_elf32_bfd_print_private_bfd_data visium_elf_print_private_bfd_data 881#define elf_backend_init_file_header visium_elf_init_file_header 882 883#include "elf32-target.h" 884