| 1 | /* OpenRISC-specific support for 32-bit ELF. |
| 2 | Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
| 3 | Free Software Foundation, Inc. |
| 4 | Contributed by Johan Rydberg, jrydberg@opencores.org |
| 5 | |
| 6 | This file is part of BFD, the Binary File Descriptor library. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, |
| 21 | USA. */ |
| 22 | |
| 23 | #include "bfd.h" |
| 24 | #include "sysdep.h" |
| 25 | #include "libbfd.h" |
| 26 | #include "elf-bfd.h" |
| 27 | #include "elf/openrisc.h" |
| 28 | #include "libiberty.h" |
| 29 | |
| 30 | static reloc_howto_type openrisc_elf_howto_table[] = |
| 31 | { |
| 32 | /* This reloc does nothing. */ |
| 33 | HOWTO (R_OPENRISC_NONE, /* type */ |
| 34 | 0, /* rightshift */ |
| 35 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 36 | 32, /* bitsize */ |
| 37 | FALSE, /* pc_relative */ |
| 38 | 0, /* bitpos */ |
| 39 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 40 | bfd_elf_generic_reloc, /* special_function */ |
| 41 | "R_OPENRISC_NONE", /* name */ |
| 42 | FALSE, /* partial_inplace */ |
| 43 | 0, /* src_mask */ |
| 44 | 0, /* dst_mask */ |
| 45 | FALSE), /* pcrel_offset */ |
| 46 | |
| 47 | /* A PC relative 26 bit relocation, right shifted by 2. */ |
| 48 | HOWTO (R_OPENRISC_INSN_REL_26, /* type */ |
| 49 | 2, /* rightshift */ |
| 50 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 51 | 26, /* bitsize */ |
| 52 | TRUE, /* pc_relative */ |
| 53 | 0, /* bitpos */ |
| 54 | complain_overflow_signed, /* complain_on_overflow */ |
| 55 | bfd_elf_generic_reloc, /* special_function */ |
| 56 | "R_OPENRISC_INSN_REL_26", /* name */ |
| 57 | FALSE, /* partial_inplace */ |
| 58 | 0x00000000, /* src_mask */ |
| 59 | 0x03ffffff, /* dst_mask */ |
| 60 | FALSE), /* pcrel_offset */ |
| 61 | |
| 62 | /* A absolute 26 bit relocation, right shifted by 2. */ |
| 63 | HOWTO (R_OPENRISC_INSN_ABS_26, /* type */ |
| 64 | 2, /* rightshift */ |
| 65 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 66 | 26, /* bitsize */ |
| 67 | FALSE, /* pc_relative */ |
| 68 | 0, /* bitpos */ |
| 69 | complain_overflow_signed, /* complain_on_overflow */ |
| 70 | bfd_elf_generic_reloc, /* special_function */ |
| 71 | "R_OPENRISC_INSN_ABS_26", /* name */ |
| 72 | FALSE, /* partial_inplace */ |
| 73 | 0x00000000, /* src_mask */ |
| 74 | 0x03ffffff, /* dst_mask */ |
| 75 | FALSE), /* pcrel_offset */ |
| 76 | |
| 77 | HOWTO (R_OPENRISC_LO_16_IN_INSN, /* type */ |
| 78 | 0, /* rightshift */ |
| 79 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 80 | 16, /* bitsize */ |
| 81 | FALSE, /* pc_relative */ |
| 82 | 0, /* bitpos */ |
| 83 | complain_overflow_dont, /* complain_on_overflow */ |
| 84 | bfd_elf_generic_reloc, /* special_function */ |
| 85 | "R_OPENRISC_LO_16_IN_INSN", /* name */ |
| 86 | FALSE, /* partial_inplace */ |
| 87 | 0, /* src_mask */ |
| 88 | 0x0000ffff, /* dst_mask */ |
| 89 | FALSE), /* pcrel_offset */ |
| 90 | |
| 91 | HOWTO (R_OPENRISC_HI_16_IN_INSN, /* type */ |
| 92 | 16, /* rightshift */ |
| 93 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 94 | 16, /* bitsize */ |
| 95 | FALSE, /* pc_relative */ |
| 96 | 0, /* bitpos */ |
| 97 | complain_overflow_dont, /* complain_on_overflow */ |
| 98 | bfd_elf_generic_reloc, /* special_function */ |
| 99 | "R_OPENRISC_HI_16_IN_INSN", /* name */ |
| 100 | FALSE, /* partial_inplace */ |
| 101 | 0, /* src_mask */ |
| 102 | 0x0000ffff, /* dst_mask */ |
| 103 | FALSE), /* pcrel_offset */ |
| 104 | |
| 105 | /* An 8 bit absolute relocation. */ |
| 106 | HOWTO (R_OPENRISC_8, /* type */ |
| 107 | 0, /* rightshift */ |
| 108 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 109 | 8, /* bitsize */ |
| 110 | FALSE, /* pc_relative */ |
| 111 | 0, /* bitpos */ |
| 112 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 113 | bfd_elf_generic_reloc, /* special_function */ |
| 114 | "R_OPENRISC_8", /* name */ |
| 115 | TRUE, /* partial_inplace */ |
| 116 | 0x0000, /* src_mask */ |
| 117 | 0x00ff, /* dst_mask */ |
| 118 | FALSE), /* pcrel_offset */ |
| 119 | |
| 120 | /* A 16 bit absolute relocation. */ |
| 121 | HOWTO (R_OPENRISC_16, /* type */ |
| 122 | 0, /* rightshift */ |
| 123 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 124 | 16, /* bitsize */ |
| 125 | FALSE, /* pc_relative */ |
| 126 | 0, /* bitpos */ |
| 127 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 128 | bfd_elf_generic_reloc, /* special_function */ |
| 129 | "R_OPENRISC_16", /* name */ |
| 130 | TRUE, /* partial_inplace */ |
| 131 | 0x00000000, /* src_mask */ |
| 132 | 0x0000ffff, /* dst_mask */ |
| 133 | FALSE), /* pcrel_offset */ |
| 134 | |
| 135 | /* A 32 bit absolute relocation. */ |
| 136 | HOWTO (R_OPENRISC_32, /* type */ |
| 137 | 0, /* rightshift */ |
| 138 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 139 | 32, /* bitsize */ |
| 140 | FALSE, /* pc_relative */ |
| 141 | 0, /* bitpos */ |
| 142 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 143 | bfd_elf_generic_reloc, /* special_function */ |
| 144 | "R_OPENRISC_32", /* name */ |
| 145 | TRUE, /* partial_inplace */ |
| 146 | 0x00000000, /* src_mask */ |
| 147 | 0xffffffff, /* dst_mask */ |
| 148 | FALSE), /* pcrel_offset */ |
| 149 | |
| 150 | /* GNU extension to record C++ vtable hierarchy. */ |
| 151 | HOWTO (R_OPENRISC_GNU_VTINHERIT, /* type */ |
| 152 | 0, /* rightshift */ |
| 153 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 154 | 0, /* bitsize */ |
| 155 | FALSE, /* pc_relative */ |
| 156 | 0, /* bitpos */ |
| 157 | complain_overflow_dont, /* complain_on_overflow */ |
| 158 | NULL, /* special_function */ |
| 159 | "R_OPENRISC_GNU_VTINHERIT", /* name */ |
| 160 | FALSE, /* partial_inplace */ |
| 161 | 0, /* src_mask */ |
| 162 | 0, /* dst_mask */ |
| 163 | FALSE), /* pcrel_offset */ |
| 164 | |
| 165 | /* GNU extension to record C++ vtable member usage. */ |
| 166 | HOWTO (R_OPENRISC_GNU_VTENTRY, /* type */ |
| 167 | 0, /* rightshift */ |
| 168 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 169 | 0, /* bitsize */ |
| 170 | FALSE, /* pc_relative */ |
| 171 | 0, /* bitpos */ |
| 172 | complain_overflow_dont, /* complain_on_overflow */ |
| 173 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| 174 | "R_OPENRISC_GNU_VTENTRY", /* name */ |
| 175 | FALSE, /* partial_inplace */ |
| 176 | 0, /* src_mask */ |
| 177 | 0, /* dst_mask */ |
| 178 | FALSE), /* pcrel_offset */ |
| 179 | }; |
| 180 | |
| 181 | /* Map BFD reloc types to OpenRISC ELF reloc types. */ |
| 182 | |
| 183 | struct openrisc_reloc_map |
| 184 | { |
| 185 | bfd_reloc_code_real_type bfd_reloc_val; |
| 186 | unsigned int openrisc_reloc_val; |
| 187 | }; |
| 188 | |
| 189 | static const struct openrisc_reloc_map openrisc_reloc_map[] = |
| 190 | { |
| 191 | { BFD_RELOC_NONE, R_OPENRISC_NONE }, |
| 192 | { BFD_RELOC_32, R_OPENRISC_32 }, |
| 193 | { BFD_RELOC_16, R_OPENRISC_16 }, |
| 194 | { BFD_RELOC_8, R_OPENRISC_8 }, |
| 195 | { BFD_RELOC_OPENRISC_REL_26, R_OPENRISC_INSN_REL_26 }, |
| 196 | { BFD_RELOC_OPENRISC_ABS_26, R_OPENRISC_INSN_ABS_26 }, |
| 197 | { BFD_RELOC_HI16, R_OPENRISC_HI_16_IN_INSN }, |
| 198 | { BFD_RELOC_LO16, R_OPENRISC_LO_16_IN_INSN }, |
| 199 | { BFD_RELOC_VTABLE_INHERIT, R_OPENRISC_GNU_VTINHERIT }, |
| 200 | { BFD_RELOC_VTABLE_ENTRY, R_OPENRISC_GNU_VTENTRY } |
| 201 | }; |
| 202 | |
| 203 | static reloc_howto_type * |
| 204 | openrisc_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
| 205 | bfd_reloc_code_real_type code) |
| 206 | { |
| 207 | unsigned int i; |
| 208 | |
| 209 | for (i = ARRAY_SIZE (openrisc_reloc_map); --i;) |
| 210 | if (openrisc_reloc_map[i].bfd_reloc_val == code) |
| 211 | return & openrisc_elf_howto_table[openrisc_reloc_map[i]. |
| 212 | openrisc_reloc_val]; |
| 213 | |
| 214 | return NULL; |
| 215 | } |
| 216 | |
| 217 | static reloc_howto_type * |
| 218 | openrisc_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 219 | const char *r_name) |
| 220 | { |
| 221 | unsigned int i; |
| 222 | |
| 223 | for (i = 0; |
| 224 | i < (sizeof (openrisc_elf_howto_table) |
| 225 | / sizeof (openrisc_elf_howto_table[0])); |
| 226 | i++) |
| 227 | if (openrisc_elf_howto_table[i].name != NULL |
| 228 | && strcasecmp (openrisc_elf_howto_table[i].name, r_name) == 0) |
| 229 | return &openrisc_elf_howto_table[i]; |
| 230 | |
| 231 | return NULL; |
| 232 | } |
| 233 | |
| 234 | /* Set the howto pointer for an OpenRISC ELF reloc. */ |
| 235 | |
| 236 | static void |
| 237 | openrisc_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED, |
| 238 | arelent * cache_ptr, |
| 239 | Elf_Internal_Rela * dst) |
| 240 | { |
| 241 | unsigned int r_type; |
| 242 | |
| 243 | r_type = ELF32_R_TYPE (dst->r_info); |
| 244 | BFD_ASSERT (r_type < (unsigned int) R_OPENRISC_max); |
| 245 | cache_ptr->howto = & openrisc_elf_howto_table[r_type]; |
| 246 | } |
| 247 | |
| 248 | /* Perform a single relocation. By default we use the standard BFD |
| 249 | routines, but a few relocs, we have to do them ourselves. */ |
| 250 | |
| 251 | static bfd_reloc_status_type |
| 252 | openrisc_final_link_relocate (reloc_howto_type *howto, |
| 253 | bfd *input_bfd, |
| 254 | asection *input_section, |
| 255 | bfd_byte *contents, |
| 256 | Elf_Internal_Rela *rel, |
| 257 | bfd_vma relocation) |
| 258 | { |
| 259 | bfd_reloc_status_type r = bfd_reloc_ok; |
| 260 | |
| 261 | switch (howto->type) |
| 262 | { |
| 263 | case R_OPENRISC_LO_16_IN_INSN: |
| 264 | relocation &= 0xffff; |
| 265 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 266 | contents, rel->r_offset, |
| 267 | relocation, rel->r_addend); |
| 268 | break; |
| 269 | |
| 270 | default: |
| 271 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 272 | contents, rel->r_offset, |
| 273 | relocation, rel->r_addend); |
| 274 | } |
| 275 | |
| 276 | return r; |
| 277 | } |
| 278 | |
| 279 | /* Relocate an OpenRISC ELF section. |
| 280 | |
| 281 | The RELOCATE_SECTION function is called by the new ELF backend linker |
| 282 | to handle the relocations for a section. |
| 283 | |
| 284 | The relocs are always passed as Rela structures; if the section |
| 285 | actually uses Rel structures, the r_addend field will always be |
| 286 | zero. |
| 287 | |
| 288 | This function is responsible for adjusting the section contents as |
| 289 | necessary, and (if using Rela relocs and generating a relocatable |
| 290 | output file) adjusting the reloc addend as necessary. |
| 291 | |
| 292 | This function does not have to worry about setting the reloc |
| 293 | address or the reloc symbol index. |
| 294 | |
| 295 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
| 296 | |
| 297 | LOCAL_SECTIONS is an array giving the section in the input file |
| 298 | corresponding to the st_shndx field of each local symbol. |
| 299 | |
| 300 | The global hash table entry for the global symbols can be found |
| 301 | via elf_sym_hashes (input_bfd). |
| 302 | |
| 303 | When generating relocatable output, this function must handle |
| 304 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| 305 | going to be the section symbol corresponding to the output |
| 306 | section, which means that the addend must be adjusted |
| 307 | accordingly. */ |
| 308 | |
| 309 | static bfd_boolean |
| 310 | openrisc_elf_relocate_section (bfd *output_bfd, |
| 311 | struct bfd_link_info *info, |
| 312 | bfd *input_bfd, |
| 313 | asection *input_section, |
| 314 | bfd_byte *contents, |
| 315 | Elf_Internal_Rela *relocs, |
| 316 | Elf_Internal_Sym *local_syms, |
| 317 | asection **local_sections) |
| 318 | { |
| 319 | Elf_Internal_Shdr *symtab_hdr; |
| 320 | struct elf_link_hash_entry **sym_hashes; |
| 321 | Elf_Internal_Rela *rel; |
| 322 | Elf_Internal_Rela *relend; |
| 323 | |
| 324 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 325 | sym_hashes = elf_sym_hashes (input_bfd); |
| 326 | relend = relocs + input_section->reloc_count; |
| 327 | |
| 328 | for (rel = relocs; rel < relend; rel++) |
| 329 | { |
| 330 | reloc_howto_type *howto; |
| 331 | unsigned long r_symndx; |
| 332 | Elf_Internal_Sym *sym; |
| 333 | asection *sec; |
| 334 | struct elf_link_hash_entry *h; |
| 335 | bfd_vma relocation; |
| 336 | bfd_reloc_status_type r; |
| 337 | const char *name = NULL; |
| 338 | int r_type; |
| 339 | |
| 340 | r_type = ELF32_R_TYPE (rel->r_info); |
| 341 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 342 | |
| 343 | if (r_type == R_OPENRISC_GNU_VTINHERIT |
| 344 | || r_type == R_OPENRISC_GNU_VTENTRY) |
| 345 | continue; |
| 346 | |
| 347 | if ((unsigned int) r_type > |
| 348 | (sizeof openrisc_elf_howto_table / sizeof (reloc_howto_type))) |
| 349 | abort (); |
| 350 | |
| 351 | howto = openrisc_elf_howto_table + ELF32_R_TYPE (rel->r_info); |
| 352 | h = NULL; |
| 353 | sym = NULL; |
| 354 | sec = NULL; |
| 355 | |
| 356 | if (r_symndx < symtab_hdr->sh_info) |
| 357 | { |
| 358 | sym = local_syms + r_symndx; |
| 359 | sec = local_sections[r_symndx]; |
| 360 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 361 | |
| 362 | name = bfd_elf_string_from_elf_section |
| 363 | (input_bfd, symtab_hdr->sh_link, sym->st_name); |
| 364 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; |
| 365 | } |
| 366 | else |
| 367 | { |
| 368 | bfd_boolean unresolved_reloc, warned; |
| 369 | |
| 370 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 371 | r_symndx, symtab_hdr, sym_hashes, |
| 372 | h, sec, relocation, |
| 373 | unresolved_reloc, warned); |
| 374 | } |
| 375 | |
| 376 | if (sec != NULL && elf_discarded_section (sec)) |
| 377 | { |
| 378 | /* For relocs against symbols from removed linkonce sections, |
| 379 | or sections discarded by a linker script, we just want the |
| 380 | section contents zeroed. Avoid any special processing. */ |
| 381 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); |
| 382 | rel->r_info = 0; |
| 383 | rel->r_addend = 0; |
| 384 | continue; |
| 385 | } |
| 386 | |
| 387 | if (info->relocatable) |
| 388 | continue; |
| 389 | |
| 390 | r = openrisc_final_link_relocate (howto, input_bfd, input_section, |
| 391 | contents, rel, relocation); |
| 392 | |
| 393 | if (r != bfd_reloc_ok) |
| 394 | { |
| 395 | const char *msg = NULL; |
| 396 | |
| 397 | switch (r) |
| 398 | { |
| 399 | case bfd_reloc_overflow: |
| 400 | r = info->callbacks->reloc_overflow |
| 401 | (info, (h ? &h->root : NULL), name, howto->name, |
| 402 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); |
| 403 | break; |
| 404 | |
| 405 | case bfd_reloc_undefined: |
| 406 | r = info->callbacks->undefined_symbol |
| 407 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); |
| 408 | break; |
| 409 | |
| 410 | case bfd_reloc_outofrange: |
| 411 | msg = _("internal error: out of range error"); |
| 412 | break; |
| 413 | |
| 414 | case bfd_reloc_notsupported: |
| 415 | msg = _("internal error: unsupported relocation error"); |
| 416 | break; |
| 417 | |
| 418 | case bfd_reloc_dangerous: |
| 419 | msg = _("internal error: dangerous relocation"); |
| 420 | break; |
| 421 | |
| 422 | default: |
| 423 | msg = _("internal error: unknown error"); |
| 424 | break; |
| 425 | } |
| 426 | |
| 427 | if (msg) |
| 428 | r = info->callbacks->warning |
| 429 | (info, msg, name, input_bfd, input_section, rel->r_offset); |
| 430 | |
| 431 | if (!r) |
| 432 | return FALSE; |
| 433 | } |
| 434 | } |
| 435 | |
| 436 | return TRUE; |
| 437 | } |
| 438 | |
| 439 | /* Return the section that should be marked against GC for a given |
| 440 | relocation. */ |
| 441 | |
| 442 | static asection * |
| 443 | openrisc_elf_gc_mark_hook (asection *sec, |
| 444 | struct bfd_link_info *info, |
| 445 | Elf_Internal_Rela *rel, |
| 446 | struct elf_link_hash_entry *h, |
| 447 | Elf_Internal_Sym *sym) |
| 448 | { |
| 449 | if (h != NULL) |
| 450 | switch (ELF32_R_TYPE (rel->r_info)) |
| 451 | { |
| 452 | case R_OPENRISC_GNU_VTINHERIT: |
| 453 | case R_OPENRISC_GNU_VTENTRY: |
| 454 | return NULL; |
| 455 | } |
| 456 | |
| 457 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 458 | } |
| 459 | |
| 460 | /* Look through the relocs for a section during the first phase. |
| 461 | Since we don't do .gots or .plts, we just need to consider the |
| 462 | virtual table relocs for gc. */ |
| 463 | |
| 464 | static bfd_boolean |
| 465 | openrisc_elf_check_relocs (bfd *abfd, |
| 466 | struct bfd_link_info *info, |
| 467 | asection *sec, |
| 468 | const Elf_Internal_Rela *relocs) |
| 469 | { |
| 470 | Elf_Internal_Shdr *symtab_hdr; |
| 471 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; |
| 472 | const Elf_Internal_Rela *rel; |
| 473 | const Elf_Internal_Rela *rel_end; |
| 474 | |
| 475 | if (info->relocatable) |
| 476 | return TRUE; |
| 477 | |
| 478 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 479 | sym_hashes = elf_sym_hashes (abfd); |
| 480 | sym_hashes_end = |
| 481 | sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); |
| 482 | if (!elf_bad_symtab (abfd)) |
| 483 | sym_hashes_end -= symtab_hdr->sh_info; |
| 484 | |
| 485 | rel_end = relocs + sec->reloc_count; |
| 486 | for (rel = relocs; rel < rel_end; rel++) |
| 487 | { |
| 488 | struct elf_link_hash_entry *h; |
| 489 | unsigned long r_symndx; |
| 490 | |
| 491 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 492 | if (r_symndx < symtab_hdr->sh_info) |
| 493 | h = NULL; |
| 494 | else |
| 495 | { |
| 496 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 497 | while (h->root.type == bfd_link_hash_indirect |
| 498 | || h->root.type == bfd_link_hash_warning) |
| 499 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 500 | } |
| 501 | |
| 502 | switch (ELF32_R_TYPE (rel->r_info)) |
| 503 | { |
| 504 | /* This relocation describes the C++ object vtable hierarchy. |
| 505 | Reconstruct it for later use during GC. */ |
| 506 | case R_OPENRISC_GNU_VTINHERIT: |
| 507 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 508 | return FALSE; |
| 509 | break; |
| 510 | |
| 511 | /* This relocation describes which C++ vtable entries are actually |
| 512 | used. Record for later use during GC. */ |
| 513 | case R_OPENRISC_GNU_VTENTRY: |
| 514 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 515 | return FALSE; |
| 516 | break; |
| 517 | } |
| 518 | } |
| 519 | |
| 520 | return TRUE; |
| 521 | } |
| 522 | |
| 523 | /* Set the right machine number. */ |
| 524 | |
| 525 | static bfd_boolean |
| 526 | openrisc_elf_object_p (bfd *abfd) |
| 527 | { |
| 528 | bfd_default_set_arch_mach (abfd, bfd_arch_openrisc, 0); |
| 529 | return TRUE; |
| 530 | } |
| 531 | |
| 532 | /* Store the machine number in the flags field. */ |
| 533 | |
| 534 | static void |
| 535 | openrisc_elf_final_write_processing (bfd *abfd, |
| 536 | bfd_boolean linker ATTRIBUTE_UNUSED) |
| 537 | { |
| 538 | unsigned long val; |
| 539 | |
| 540 | switch (bfd_get_mach (abfd)) |
| 541 | { |
| 542 | default: |
| 543 | val = 0; |
| 544 | break; |
| 545 | } |
| 546 | |
| 547 | elf_elfheader (abfd)->e_flags &= ~0xf; |
| 548 | elf_elfheader (abfd)->e_flags |= val; |
| 549 | } |
| 550 | |
| 551 | |
| 552 | #define ELF_ARCH bfd_arch_openrisc |
| 553 | #define ELF_MACHINE_CODE EM_OPENRISC |
| 554 | #define ELF_MACHINE_ALT1 EM_OPENRISC_OLD |
| 555 | #define ELF_MAXPAGESIZE 0x1000 |
| 556 | |
| 557 | #define TARGET_BIG_SYM bfd_elf32_openrisc_vec |
| 558 | #define TARGET_BIG_NAME "elf32-openrisc" |
| 559 | |
| 560 | #define elf_info_to_howto_rel NULL |
| 561 | #define elf_info_to_howto openrisc_info_to_howto_rela |
| 562 | #define elf_backend_relocate_section openrisc_elf_relocate_section |
| 563 | #define elf_backend_gc_mark_hook openrisc_elf_gc_mark_hook |
| 564 | #define elf_backend_check_relocs openrisc_elf_check_relocs |
| 565 | |
| 566 | #define elf_backend_can_gc_sections 1 |
| 567 | #define elf_backend_rela_normal 1 |
| 568 | |
| 569 | #define bfd_elf32_bfd_reloc_type_lookup openrisc_reloc_type_lookup |
| 570 | #define bfd_elf32_bfd_reloc_name_lookup openrisc_reloc_name_lookup |
| 571 | |
| 572 | #define elf_backend_object_p openrisc_elf_object_p |
| 573 | #define elf_backend_final_write_processing openrisc_elf_final_write_processing |
| 574 | |
| 575 | #include "elf32-target.h" |