elf32-visium.c revision 1.1.1.3.2.1
1 /* Visium-specific support for 32-bit ELF. 2 3 Copyright (C) 2003-2018 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 30 static bfd_reloc_status_type visium_elf_howto_parity_reloc 31 (bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **); 32 33 static reloc_howto_type visium_elf_howto_table[] = { 34 /* This reloc does nothing. */ 35 HOWTO (R_VISIUM_NONE, /* type */ 36 0, /* rightshift */ 37 3, /* size (0 = byte, 1 = short, 2 = long) */ 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 0, /* size (0 = byte, 1 = short, 2 = long) */ 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 1, /* size (0 = byte, 1 = short, 2 = long) */ 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 2, /* size (0 = byte, 1 = short, 2 = long) */ 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 0, /* size (0 = byte, 1 = short, 2 = long) */ 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 1, /* size (0 = byte, 1 = short, 2 = long) */ 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 2, /* size (0 = byte, 1 = short, 2 = long) */ 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 2, /* size (0 = byte, 1 = short, 2 = long) */ 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 2, /* size (0 = byte, 1 = short, 2 = long) */ 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 2, /* size (0 = byte, 1 = short, 2 = long) */ 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 2, /* size (0 = byte, 1 = short, 2 = long) */ 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 2, /* size (0 = byte, 1 = short, 2 = long) */ 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 2, /* size (0 = byte, 1 = short, 2 = long) */ 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 2, /* size (0 = byte, 1 = short, 2 = long) */ 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. */ 249 static reloc_howto_type visium_elf_vtinherit_howto = 250 HOWTO (R_VISIUM_GNU_VTINHERIT, /* type */ 251 0, /* rightshift */ 252 2, /* size (0 = byte, 1 = short, 2 = long) */ 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. */ 265 static reloc_howto_type visium_elf_vtentry_howto = 266 HOWTO (R_VISIUM_GNU_VTENTRY, /* type */ 267 0, /* rightshift */ 268 2, /* size (0 = byte, 1 = short, 2 = long) */ 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. */ 281 282 static bfd_vma 283 visium_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. */ 304 305 static bfd_reloc_status_type 306 visium_elf_howto_parity_reloc (bfd * input_bfd, arelent *reloc_entry, 307 asymbol *symbol, PTR 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 const bfd_vma signmask = 0xffff8000; 316 317 /* This part is from bfd_elf_generic_reloc. 318 If we're relocating, and this an external symbol, we don't want 319 to change anything. */ 320 if (output_bfd != (bfd *) NULL && (symbol->flags & BSF_SECTION_SYM) == 0) 321 { 322 reloc_entry->address += input_section->output_offset; 323 return bfd_reloc_ok; 324 } 325 326 /* Now do the reloc in the usual way. */ 327 328 /* Sanity check the address (offset in section). */ 329 if (reloc_entry->address > bfd_get_section_limit (input_bfd, input_section)) 330 return bfd_reloc_outofrange; 331 332 ret = bfd_reloc_ok; 333 if (bfd_is_und_section (symbol->section) && output_bfd == (bfd *) NULL) 334 ret = bfd_reloc_undefined; 335 336 if (bfd_is_com_section (symbol->section) || output_bfd != (bfd *) NULL) 337 relocation = 0; 338 else 339 relocation = symbol->value; 340 341 /* Only do this for a final link. */ 342 if (output_bfd == (bfd *) NULL) 343 { 344 relocation += symbol->section->output_section->vma; 345 relocation += symbol->section->output_offset; 346 } 347 348 relocation += reloc_entry->addend; 349 inplace_address = (bfd_byte *) data + reloc_entry->address; 350 insn = bfd_get_32 (input_bfd, inplace_address); 351 352 if (reloc_entry->howto->pc_relative) 353 { 354 relocation -= input_section->output_section->vma 355 + input_section->output_offset; 356 relocation -= reloc_entry->address; 357 } 358 359 switch (reloc_entry->howto->type) 360 { 361 case R_VISIUM_PC16: 362 relocation >>= 2; 363 if (ret == bfd_reloc_ok && (relocation & signmask) != 0 364 && (relocation & signmask) != signmask) 365 ret = bfd_reloc_overflow; 366 relocation &= 0xffff; 367 break; 368 case R_VISIUM_HI16: 369 case R_VISIUM_HI16_PCREL: 370 relocation = (relocation >> 16) & 0xffff; 371 break; 372 case R_VISIUM_LO16: 373 case R_VISIUM_LO16_PCREL: 374 relocation &= 0xffff; 375 break; 376 case R_VISIUM_IM16: 377 case R_VISIUM_IM16_PCREL: 378 if (ret == bfd_reloc_ok && (relocation & 0xffff0000) != 0) 379 ret = bfd_reloc_overflow; 380 relocation &= 0xffff; 381 break; 382 } 383 insn = (insn & 0x7fff0000) | relocation; 384 insn |= visium_parity_bit (insn); 385 bfd_put_32 (input_bfd, insn, inplace_address); 386 387 if (output_bfd != (bfd *) NULL) 388 reloc_entry->address += input_section->output_offset; 389 390 return ret; 391 } 392 393 static reloc_howto_type * 394 visium_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 395 bfd_reloc_code_real_type code) 396 { 397 /* Note that the visium_elf_howto_table is indexed by the R_ 398 constants. Thus, the order that the howto records appear in the 399 table *must* match the order of the relocation types defined in 400 include/elf/visium.h. */ 401 switch (code) 402 { 403 case BFD_RELOC_NONE: 404 return &visium_elf_howto_table[(int) R_VISIUM_NONE]; 405 case BFD_RELOC_8: 406 return &visium_elf_howto_table[(int) R_VISIUM_8]; 407 case BFD_RELOC_16: 408 return &visium_elf_howto_table[(int) R_VISIUM_16]; 409 case BFD_RELOC_32: 410 return &visium_elf_howto_table[(int) R_VISIUM_32]; 411 case BFD_RELOC_8_PCREL: 412 return &visium_elf_howto_table[(int) R_VISIUM_8_PCREL]; 413 case BFD_RELOC_16_PCREL: 414 return &visium_elf_howto_table[(int) R_VISIUM_16_PCREL]; 415 case BFD_RELOC_32_PCREL: 416 return &visium_elf_howto_table[(int) R_VISIUM_32_PCREL]; 417 case BFD_RELOC_VISIUM_REL16: 418 return &visium_elf_howto_table[(int) R_VISIUM_PC16]; 419 case BFD_RELOC_VISIUM_HI16: 420 return &visium_elf_howto_table[(int) R_VISIUM_HI16]; 421 case BFD_RELOC_VISIUM_LO16: 422 return &visium_elf_howto_table[(int) R_VISIUM_LO16]; 423 case BFD_RELOC_VISIUM_IM16: 424 return &visium_elf_howto_table[(int) R_VISIUM_IM16]; 425 case BFD_RELOC_VISIUM_HI16_PCREL: 426 return &visium_elf_howto_table[(int) R_VISIUM_HI16_PCREL]; 427 case BFD_RELOC_VISIUM_LO16_PCREL: 428 return &visium_elf_howto_table[(int) R_VISIUM_LO16_PCREL]; 429 case BFD_RELOC_VISIUM_IM16_PCREL: 430 return &visium_elf_howto_table[(int) R_VISIUM_IM16_PCREL]; 431 case BFD_RELOC_VTABLE_INHERIT: 432 return &visium_elf_vtinherit_howto; 433 case BFD_RELOC_VTABLE_ENTRY: 434 return &visium_elf_vtentry_howto; 435 default: 436 return NULL; 437 } 438 } 439 440 static reloc_howto_type * 441 visium_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) 442 { 443 unsigned int i; 444 445 for (i = 0; 446 i < (sizeof (visium_elf_howto_table) 447 / sizeof (visium_elf_howto_table[0])); i++) 448 if (visium_elf_howto_table[i].name != NULL 449 && strcasecmp (visium_elf_howto_table[i].name, r_name) == 0) 450 return &visium_elf_howto_table[i]; 451 452 if (strcasecmp (visium_elf_vtinherit_howto.name, r_name) == 0) 453 return &visium_elf_vtinherit_howto; 454 if (strcasecmp (visium_elf_vtentry_howto.name, r_name) == 0) 455 return &visium_elf_vtentry_howto; 456 457 return NULL; 458 } 459 460 /* Set the howto pointer for a VISIUM ELF reloc. */ 461 462 static bfd_boolean 463 visium_info_to_howto_rela (bfd *abfd, arelent *cache_ptr, 464 Elf_Internal_Rela *dst) 465 { 466 unsigned int r_type = ELF32_R_TYPE (dst->r_info); 467 468 switch (r_type) 469 { 470 case R_VISIUM_GNU_VTINHERIT: 471 cache_ptr->howto = &visium_elf_vtinherit_howto; 472 break; 473 474 case R_VISIUM_GNU_VTENTRY: 475 cache_ptr->howto = &visium_elf_vtentry_howto; 476 break; 477 478 default: 479 if (r_type >= ARRAY_SIZE (visium_elf_howto_table)) 480 { 481 /* xgettext:c-format */ 482 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 483 abfd, r_type); 484 bfd_set_error (bfd_error_bad_value); 485 return FALSE; 486 } 487 cache_ptr->howto = &visium_elf_howto_table[r_type]; 488 break; 489 } 490 return TRUE; 491 } 492 493 /* Look through the relocs for a section during the first phase. 494 Since we don't do .gots or .plts, we just need to consider the 495 virtual table relocs for gc. */ 496 497 static bfd_boolean 498 visium_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, 499 asection *sec, const Elf_Internal_Rela *relocs) 500 { 501 Elf_Internal_Shdr *symtab_hdr; 502 struct elf_link_hash_entry **sym_hashes; 503 const Elf_Internal_Rela *rel; 504 const Elf_Internal_Rela *rel_end; 505 506 if (bfd_link_relocatable (info)) 507 return TRUE; 508 509 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 510 sym_hashes = elf_sym_hashes (abfd); 511 512 rel_end = relocs + sec->reloc_count; 513 for (rel = relocs; rel < rel_end; rel++) 514 { 515 struct elf_link_hash_entry *h; 516 unsigned long r_symndx; 517 518 r_symndx = ELF32_R_SYM (rel->r_info); 519 if (r_symndx < symtab_hdr->sh_info) 520 h = NULL; 521 else 522 { 523 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 524 while (h->root.type == bfd_link_hash_indirect 525 || h->root.type == bfd_link_hash_warning) 526 h = (struct elf_link_hash_entry *) h->root.u.i.link; 527 } 528 529 switch (ELF32_R_TYPE (rel->r_info)) 530 { 531 /* This relocation describes the C++ object vtable hierarchy. 532 Reconstruct it for later use during GC. */ 533 case R_VISIUM_GNU_VTINHERIT: 534 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 535 return FALSE; 536 break; 537 538 /* This relocation describes which C++ vtable entries are actually 539 used. Record for later use during GC. */ 540 case R_VISIUM_GNU_VTENTRY: 541 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 542 return FALSE; 543 break; 544 } 545 } 546 547 return TRUE; 548 } 549 550 /* Relocate a VISIUM ELF section. */ 551 552 static bfd_boolean 553 visium_elf_relocate_section (bfd *output_bfd, 554 struct bfd_link_info *info, bfd *input_bfd, 555 asection *input_section, bfd_byte *contents, 556 Elf_Internal_Rela *relocs, 557 Elf_Internal_Sym *local_syms, 558 asection **local_sections) 559 { 560 Elf_Internal_Shdr *symtab_hdr; 561 struct elf_link_hash_entry **sym_hashes; 562 Elf_Internal_Rela *rel; 563 Elf_Internal_Rela *relend; 564 565 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 566 sym_hashes = elf_sym_hashes (input_bfd); 567 relend = relocs + input_section->reloc_count; 568 569 for (rel = relocs; rel < relend; rel++) 570 { 571 reloc_howto_type *howto; 572 unsigned long r_symndx; 573 Elf_Internal_Sym *sym; 574 asection *sec; 575 struct elf_link_hash_entry *h; 576 bfd_vma relocation; 577 bfd_reloc_status_type r; 578 const char *name = NULL; 579 int r_type; 580 bfd_vma insn; 581 582 r_type = ELF32_R_TYPE (rel->r_info); 583 584 if (r_type == R_VISIUM_GNU_VTINHERIT || r_type == R_VISIUM_GNU_VTENTRY) 585 continue; 586 587 r_symndx = ELF32_R_SYM (rel->r_info); 588 589 howto = visium_elf_howto_table + ELF32_R_TYPE (rel->r_info); 590 h = NULL; 591 sym = NULL; 592 sec = NULL; 593 594 if (r_symndx < symtab_hdr->sh_info) 595 { 596 /* This is a local symbol. */ 597 sym = local_syms + r_symndx; 598 sec = local_sections[r_symndx]; 599 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 600 601 name = bfd_elf_string_from_elf_section 602 (input_bfd, symtab_hdr->sh_link, sym->st_name); 603 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; 604 } 605 else 606 { 607 bfd_boolean unresolved_reloc; 608 bfd_boolean warned, ignored; 609 610 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 611 r_symndx, symtab_hdr, sym_hashes, 612 h, sec, relocation, 613 unresolved_reloc, warned, ignored); 614 615 name = h->root.root.string; 616 } 617 618 if (sec != NULL && discarded_section (sec)) 619 { 620 /* For relocs against symbols from removed linkonce sections, 621 or sections discarded by a linker script, we just want the 622 section contents zeroed. Avoid any special processing. */ 623 _bfd_clear_contents (howto, input_bfd, input_section, 624 contents + rel->r_offset); 625 626 rel->r_info = 0; 627 rel->r_addend = 0; 628 continue; 629 } 630 631 if (bfd_link_relocatable (info)) 632 continue; 633 634 switch (r_type) 635 { 636 case R_VISIUM_PC16: 637 case R_VISIUM_HI16: 638 case R_VISIUM_LO16: 639 case R_VISIUM_IM16: 640 case R_VISIUM_HI16_PCREL: 641 case R_VISIUM_LO16_PCREL: 642 case R_VISIUM_IM16_PCREL: 643 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 644 contents, rel->r_offset, 645 relocation, rel->r_addend); 646 647 /* For instruction relocations, the parity needs correcting. */ 648 if (r == bfd_reloc_ok) 649 { 650 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 651 insn = (insn & 0x7fffffff) | visium_parity_bit (insn); 652 bfd_put_32 (input_bfd, insn, contents + rel->r_offset); 653 } 654 break; 655 656 default: 657 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 658 contents, rel->r_offset, 659 relocation, rel->r_addend); 660 break; 661 } 662 663 if (r != bfd_reloc_ok) 664 { 665 const char *msg = (const char *) NULL; 666 667 switch (r) 668 { 669 case bfd_reloc_overflow: 670 (*info->callbacks->reloc_overflow) 671 (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0, 672 input_bfd, input_section, rel->r_offset); 673 break; 674 675 case bfd_reloc_undefined: 676 (*info->callbacks->undefined_symbol) 677 (info, name, input_bfd, input_section, rel->r_offset, TRUE); 678 break; 679 680 case bfd_reloc_outofrange: 681 msg = _("internal error: out of range error"); 682 break; 683 684 case bfd_reloc_notsupported: 685 msg = _("internal error: unsupported relocation error"); 686 break; 687 688 case bfd_reloc_dangerous: 689 msg = _("internal error: dangerous relocation"); 690 break; 691 692 default: 693 msg = _("internal error: unknown error"); 694 break; 695 } 696 697 if (msg) 698 (*info->callbacks->warning) (info, msg, name, input_bfd, 699 input_section, rel->r_offset); 700 } 701 } 702 703 return TRUE; 704 } 705 706 /* This function is called during section gc to discover the section a 707 to which a particular relocation refers. Return the section that 708 should be marked against GC for a given relocation. */ 709 710 static asection * 711 visium_elf_gc_mark_hook (asection *sec, struct bfd_link_info *info, 712 Elf_Internal_Rela *rel, struct elf_link_hash_entry *h, 713 Elf_Internal_Sym *sym) 714 { 715 if (h != NULL) 716 switch (ELF32_R_TYPE (rel->r_info)) 717 { 718 case R_VISIUM_GNU_VTINHERIT: 719 case R_VISIUM_GNU_VTENTRY: 720 return NULL; 721 } 722 723 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 724 } 725 726 static void 727 visium_elf_post_process_headers (bfd *abfd, 728 struct bfd_link_info *info ATTRIBUTE_UNUSED) 729 { 730 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); 731 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_STANDALONE; 732 i_ehdrp->e_ident[EI_ABIVERSION] = 1; 733 } 734 735 /* Function to set the ELF flag bits. */ 736 737 static bfd_boolean 738 visium_elf_set_private_flags (bfd *abfd, flagword flags) 739 { 740 elf_elfheader (abfd)->e_flags = flags; 741 elf_flags_init (abfd) = TRUE; 742 return TRUE; 743 } 744 745 /* Copy backend specific data from one object module to another. */ 746 747 static bfd_boolean 748 visium_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) 749 { 750 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 751 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 752 return TRUE; 753 754 BFD_ASSERT (!elf_flags_init (obfd) 755 || elf_elfheader (obfd)->e_flags == 756 elf_elfheader (ibfd)->e_flags); 757 758 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; 759 elf_flags_init (obfd) = TRUE; 760 761 /* Copy object attributes. */ 762 _bfd_elf_copy_obj_attributes (ibfd, obfd); 763 764 return TRUE; 765 } 766 767 /* Merge backend specific data from an object 768 file to the output object file when linking. */ 769 770 static bfd_boolean 771 visium_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 772 { 773 bfd *obfd = info->output_bfd; 774 flagword old_flags; 775 flagword new_flags; 776 flagword mismatch; 777 const char *opt_arch = NULL; 778 const char *new_opt_with = NULL; 779 const char *old_opt_with = NULL; 780 const char *with = "with"; 781 const char *without = "without"; 782 const char *mcm = "mcm"; 783 const char *mcm24 = "mcm24"; 784 const char *gr6 = "gr6"; 785 786 new_flags = elf_elfheader (ibfd)->e_flags; 787 old_flags = elf_elfheader (obfd)->e_flags; 788 789 if (!elf_flags_init (obfd)) 790 { 791 /* First call, no flags set. */ 792 elf_flags_init (obfd) = TRUE; 793 elf_elfheader (obfd)->e_flags = new_flags; 794 } 795 else 796 { 797 mismatch = (new_flags ^ old_flags) 798 & (EF_VISIUM_ARCH_MCM | EF_VISIUM_ARCH_MCM24 | EF_VISIUM_ARCH_GR6); 799 if (mismatch & EF_VISIUM_ARCH_GR6) 800 { 801 opt_arch = gr6; 802 new_opt_with = new_flags & EF_VISIUM_ARCH_GR6 ? with : without; 803 old_opt_with = old_flags & EF_VISIUM_ARCH_GR6 ? with : without; 804 } 805 else if (mismatch & EF_VISIUM_ARCH_MCM) 806 { 807 opt_arch = mcm; 808 new_opt_with = new_flags & EF_VISIUM_ARCH_MCM ? with : without; 809 old_opt_with = old_flags & EF_VISIUM_ARCH_MCM ? with : without; 810 } 811 else if (mismatch & EF_VISIUM_ARCH_MCM24) 812 { 813 opt_arch = mcm24; 814 new_opt_with = new_flags & EF_VISIUM_ARCH_MCM24 ? with : without; 815 old_opt_with = old_flags & EF_VISIUM_ARCH_MCM24 ? with : without; 816 } 817 818 if (mismatch) 819 _bfd_error_handler 820 /* xgettext:c-format */ 821 (_("%pB: compiled %s -mtune=%s and linked with modules" 822 " compiled %s -mtune=%s"), 823 ibfd, new_opt_with, opt_arch, old_opt_with, opt_arch); 824 } 825 826 return TRUE; 827 } 828 829 static bfd_boolean 830 visium_elf_print_private_bfd_data (bfd *abfd, void *ptr) 831 { 832 FILE *file = (FILE *) ptr; 833 flagword flags; 834 835 BFD_ASSERT (abfd != NULL && ptr != NULL); 836 837 /* Print normal ELF private data. */ 838 _bfd_elf_print_private_bfd_data (abfd, ptr); 839 840 flags = elf_elfheader (abfd)->e_flags; 841 fprintf (file, _("private flags = 0x%lx:"), (long) flags); 842 843 if (flags & EF_VISIUM_ARCH_GR6) 844 fprintf (file, " -mtune=gr6"); 845 else if (flags & EF_VISIUM_ARCH_MCM) 846 fprintf (file, " -mtune=mcm"); 847 else if (flags & EF_VISIUM_ARCH_MCM24) 848 fprintf (file, " -mtune=mcm24"); 849 850 fputc ('\n', file); 851 return TRUE; 852 } 853 854 #define ELF_ARCH bfd_arch_visium 855 #define ELF_MACHINE_CODE EM_VISIUM 856 #define ELF_MAXPAGESIZE 1 857 858 #define TARGET_BIG_SYM visium_elf32_vec 859 #define TARGET_BIG_NAME "elf32-visium" 860 861 #define elf_info_to_howto_rel NULL 862 #define elf_info_to_howto visium_info_to_howto_rela 863 #define elf_backend_relocate_section visium_elf_relocate_section 864 #define elf_backend_gc_mark_hook visium_elf_gc_mark_hook 865 #define elf_backend_check_relocs visium_elf_check_relocs 866 #define elf_backend_rela_normal 1 867 868 #define elf_backend_can_gc_sections 1 869 870 #define bfd_elf32_bfd_reloc_type_lookup visium_reloc_type_lookup 871 #define bfd_elf32_bfd_reloc_name_lookup visium_reloc_name_lookup 872 873 #define bfd_elf32_bfd_set_private_flags visium_elf_set_private_flags 874 #define bfd_elf32_bfd_copy_private_bfd_data visium_elf_copy_private_bfd_data 875 #define bfd_elf32_bfd_merge_private_bfd_data visium_elf_merge_private_bfd_data 876 #define bfd_elf32_bfd_print_private_bfd_data visium_elf_print_private_bfd_data 877 #define elf_backend_post_process_headers visium_elf_post_process_headers 878 879 #include "elf32-target.h" 880
Indexes created Mon Aug 17 00:26:26 UTC 2026