1 /* M16C/M32C specific support for 32-bit ELF. 2 Copyright (C) 2005-2022 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/m32c.h" 26 #include "libiberty.h" 27 28 /* Forward declarations. */ 29 static reloc_howto_type * m32c_reloc_type_lookup 30 (bfd *, bfd_reloc_code_real_type); 31 static bool m32c_info_to_howto_rela 32 (bfd *, arelent *, Elf_Internal_Rela *); 33 static int m32c_elf_relocate_section 34 (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); 35 static bool m32c_elf_check_relocs 36 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); 37 static bool m32c_elf_relax_delete_bytes (bfd *, asection *, bfd_vma, int); 38 #ifdef DEBUG 39 char * m32c_get_reloc (long reloc); 40 void dump_symtab (bfd *, void *, void *); 41 #endif 42 static bool m32c_elf_relax_section 43 (bfd *abfd, asection *sec, struct bfd_link_info *link_info, bool *again); 44 static bfd_reloc_status_type m32c_apply_reloc_24 45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 46 47 48 static reloc_howto_type m32c_elf_howto_table [] = 49 { 50 /* This reloc does nothing. */ 51 HOWTO (R_M32C_NONE, /* type */ 52 0, /* rightshift */ 53 0, /* size */ 54 0, /* bitsize */ 55 false, /* pc_relative */ 56 0, /* bitpos */ 57 complain_overflow_dont, /* complain_on_overflow */ 58 bfd_elf_generic_reloc, /* special_function */ 59 "R_M32C_NONE", /* name */ 60 false, /* partial_inplace */ 61 0, /* src_mask */ 62 0, /* dst_mask */ 63 false), /* pcrel_offset */ 64 65 /* GCC intentionally overflows these next two in order to work 66 around limitations in the addressing modes, so don't complain 67 about overflow. */ 68 HOWTO (R_M32C_16, /* type */ 69 0, /* rightshift */ 70 2, /* size */ 71 16, /* bitsize */ 72 false, /* pc_relative */ 73 0, /* bitpos */ 74 complain_overflow_dont, /* complain_on_overflow */ 75 bfd_elf_generic_reloc, /* special_function */ 76 "R_M32C_16", /* name */ 77 false, /* partial_inplace */ 78 0, /* src_mask */ 79 0xffff, /* dst_mask */ 80 false), /* pcrel_offset */ 81 82 HOWTO (R_M32C_24, /* type */ 83 0, /* rightshift */ 84 4, /* size */ 85 24, /* bitsize */ 86 false, /* pc_relative */ 87 0, /* bitpos */ 88 complain_overflow_dont, /* complain_on_overflow */ 89 m32c_apply_reloc_24, /* special_function */ 90 "R_M32C_24", /* name */ 91 false, /* partial_inplace */ 92 0, /* src_mask */ 93 0xffffff, /* dst_mask */ 94 false), /* pcrel_offset */ 95 96 HOWTO (R_M32C_32, /* type */ 97 0, /* rightshift */ 98 4, /* size */ 99 32, /* bitsize */ 100 false, /* pc_relative */ 101 0, /* bitpos */ 102 complain_overflow_bitfield, /* complain_on_overflow */ 103 bfd_elf_generic_reloc, /* special_function */ 104 "R_M32C_32", /* name */ 105 false, /* partial_inplace */ 106 0, /* src_mask */ 107 0xffffffff, /* dst_mask */ 108 false), /* pcrel_offset */ 109 110 HOWTO (R_M32C_8_PCREL, /* type */ 111 0, /* rightshift */ 112 1, /* size */ 113 8, /* bitsize */ 114 true, /* pc_relative */ 115 0, /* bitpos */ 116 complain_overflow_signed, /* complain_on_overflow */ 117 bfd_elf_generic_reloc, /* special_function */ 118 "R_M32C_8_PCREL", /* name */ 119 false, /* partial_inplace */ 120 0, /* src_mask */ 121 0xff, /* dst_mask */ 122 true), /* pcrel_offset */ 123 124 HOWTO (R_M32C_16_PCREL, /* type */ 125 0, /* rightshift */ 126 2, /* size */ 127 16, /* bitsize */ 128 true, /* pc_relative */ 129 0, /* bitpos */ 130 complain_overflow_signed, /* complain_on_overflow */ 131 bfd_elf_generic_reloc, /* special_function */ 132 "R_M32C_16_PCREL", /* name */ 133 false, /* partial_inplace */ 134 0, /* src_mask */ 135 0xffff, /* dst_mask */ 136 true), /* pcrel_offset */ 137 138 HOWTO (R_M32C_8, /* type */ 139 0, /* rightshift */ 140 1, /* size */ 141 8, /* bitsize */ 142 false, /* pc_relative */ 143 0, /* bitpos */ 144 complain_overflow_unsigned, /* complain_on_overflow */ 145 bfd_elf_generic_reloc, /* special_function */ 146 "R_M32C_8", /* name */ 147 false, /* partial_inplace */ 148 0, /* src_mask */ 149 0xff, /* dst_mask */ 150 false), /* pcrel_offset */ 151 152 HOWTO (R_M32C_LO16, /* type */ 153 0, /* rightshift */ 154 2, /* size */ 155 16, /* bitsize */ 156 false, /* pc_relative */ 157 0, /* bitpos */ 158 complain_overflow_dont, /* complain_on_overflow */ 159 bfd_elf_generic_reloc, /* special_function */ 160 "R_M32C_LO16", /* name */ 161 false, /* partial_inplace */ 162 0, /* src_mask */ 163 0xffff, /* dst_mask */ 164 false), /* pcrel_offset */ 165 166 HOWTO (R_M32C_HI8, /* type */ 167 0, /* rightshift */ 168 1, /* size */ 169 8, /* bitsize */ 170 false, /* pc_relative */ 171 0, /* bitpos */ 172 complain_overflow_dont, /* complain_on_overflow */ 173 bfd_elf_generic_reloc, /* special_function */ 174 "R_M32C_HI8", /* name */ 175 false, /* partial_inplace */ 176 0, /* src_mask */ 177 0xff, /* dst_mask */ 178 false), /* pcrel_offset */ 179 180 HOWTO (R_M32C_HI16, /* type */ 181 0, /* rightshift */ 182 2, /* size */ 183 16, /* bitsize */ 184 false, /* pc_relative */ 185 0, /* bitpos */ 186 complain_overflow_dont, /* complain_on_overflow */ 187 bfd_elf_generic_reloc, /* special_function */ 188 "R_M32C_HI16", /* name */ 189 false, /* partial_inplace */ 190 0, /* src_mask */ 191 0xffff, /* dst_mask */ 192 false), /* pcrel_offset */ 193 194 HOWTO (R_M32C_RL_JUMP, /* type */ 195 0, /* rightshift */ 196 0, /* size */ 197 0, /* bitsize */ 198 false, /* pc_relative */ 199 0, /* bitpos */ 200 complain_overflow_signed, /* complain_on_overflow */ 201 bfd_elf_generic_reloc, /* special_function */ 202 "R_M32C_RL_JUMP", /* name */ 203 false, /* partial_inplace */ 204 0, /* src_mask */ 205 0, /* dst_mask */ 206 false), /* pcrel_offset */ 207 208 HOWTO (R_M32C_RL_1ADDR, /* type */ 209 0, /* rightshift */ 210 0, /* size */ 211 0, /* bitsize */ 212 false, /* pc_relative */ 213 0, /* bitpos */ 214 complain_overflow_signed, /* complain_on_overflow */ 215 bfd_elf_generic_reloc, /* special_function */ 216 "R_M32C_RL_1ADDR", /* name */ 217 false, /* partial_inplace */ 218 0, /* src_mask */ 219 0, /* dst_mask */ 220 false), /* pcrel_offset */ 221 222 HOWTO (R_M32C_RL_2ADDR, /* type */ 223 0, /* rightshift */ 224 0, /* size */ 225 0, /* bitsize */ 226 false, /* pc_relative */ 227 0, /* bitpos */ 228 complain_overflow_signed, /* complain_on_overflow */ 229 bfd_elf_generic_reloc, /* special_function */ 230 "R_M32C_RL_2ADDR", /* name */ 231 false, /* partial_inplace */ 232 0, /* src_mask */ 233 0, /* dst_mask */ 234 false), /* pcrel_offset */ 235 236 }; 237 238 /* Map BFD reloc types to M32C ELF reloc types. */ 239 240 struct m32c_reloc_map 241 { 242 bfd_reloc_code_real_type bfd_reloc_val; 243 unsigned int m32c_reloc_val; 244 }; 245 246 static const struct m32c_reloc_map m32c_reloc_map [] = 247 { 248 { BFD_RELOC_NONE, R_M32C_NONE }, 249 { BFD_RELOC_16, R_M32C_16 }, 250 { BFD_RELOC_24, R_M32C_24 }, 251 { BFD_RELOC_32, R_M32C_32 }, 252 { BFD_RELOC_8_PCREL, R_M32C_8_PCREL }, 253 { BFD_RELOC_16_PCREL, R_M32C_16_PCREL }, 254 { BFD_RELOC_8, R_M32C_8 }, 255 { BFD_RELOC_LO16, R_M32C_LO16 }, 256 { BFD_RELOC_HI16, R_M32C_HI16 }, 257 { BFD_RELOC_M32C_HI8, R_M32C_HI8 }, 258 { BFD_RELOC_M32C_RL_JUMP, R_M32C_RL_JUMP }, 259 { BFD_RELOC_M32C_RL_1ADDR, R_M32C_RL_1ADDR }, 260 { BFD_RELOC_M32C_RL_2ADDR, R_M32C_RL_2ADDR } 261 }; 262 263 static reloc_howto_type * 264 m32c_reloc_type_lookup 265 (bfd * abfd ATTRIBUTE_UNUSED, 266 bfd_reloc_code_real_type code) 267 { 268 unsigned int i; 269 270 for (i = ARRAY_SIZE (m32c_reloc_map); i--;) 271 if (m32c_reloc_map [i].bfd_reloc_val == code) 272 return & m32c_elf_howto_table [m32c_reloc_map[i].m32c_reloc_val]; 273 274 return NULL; 275 } 276 277 static reloc_howto_type * 278 m32c_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) 279 { 280 unsigned int i; 281 282 for (i = 0; 283 i < sizeof (m32c_elf_howto_table) / sizeof (m32c_elf_howto_table[0]); 284 i++) 285 if (m32c_elf_howto_table[i].name != NULL 286 && strcasecmp (m32c_elf_howto_table[i].name, r_name) == 0) 287 return &m32c_elf_howto_table[i]; 288 289 return NULL; 290 } 291 292 /* Set the howto pointer for an M32C ELF reloc. */ 293 294 static bool 295 m32c_info_to_howto_rela (bfd * abfd, 296 arelent * cache_ptr, 297 Elf_Internal_Rela * dst) 298 { 299 unsigned int r_type; 300 301 r_type = ELF32_R_TYPE (dst->r_info); 302 if (r_type >= (unsigned int) R_M32C_max) 303 { 304 /* xgettext:c-format */ 305 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 306 abfd, r_type); 307 bfd_set_error (bfd_error_bad_value); 308 return false; 309 } 310 cache_ptr->howto = & m32c_elf_howto_table [r_type]; 311 return true; 312 } 313 314 315 316 /* Apply R_M32C_24 relocations. We have to do this because it's not a 317 power-of-two size, and the generic code may think it overruns the 318 section if it's right at the end. 319 320 Must return something other than bfd_reloc_continue to avoid the 321 above problem. Typical return values include bfd_reloc_ok or 322 bfd_reloc_overflow. 323 */ 324 325 static bfd_reloc_status_type m32c_apply_reloc_24 (bfd *abfd ATTRIBUTE_UNUSED, 326 arelent *reloc_entry, 327 asymbol *symbol, 328 void *vdata_start ATTRIBUTE_UNUSED, 329 asection *input_section, 330 bfd *ibfd ATTRIBUTE_UNUSED, 331 char **error_msg ATTRIBUTE_UNUSED) 332 { 333 bfd_vma relocation; 334 bfd_reloc_status_type s; 335 336 s = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, 337 vdata_start, 338 input_section, ibfd, error_msg); 339 if (s != bfd_reloc_continue) 340 return s; 341 342 /* Get symbol value. (Common symbols are special.) */ 343 if (bfd_is_com_section (symbol->section)) 344 relocation = 0; 345 else 346 relocation = symbol->value; 347 348 relocation += symbol->section->output_offset; 349 350 /* Add in supplied addend. */ 351 relocation += reloc_entry->addend; 352 353 reloc_entry->addend = relocation; 354 reloc_entry->address += input_section->output_offset; 355 return bfd_reloc_ok; 356 } 357 358 /* Relocate an M32C ELF section. 359 There is some attempt to make this function usable for many architectures, 360 both USE_REL and USE_RELA ['twould be nice if such a critter existed], 361 if only to serve as a learning tool. 362 363 The RELOCATE_SECTION function is called by the new ELF backend linker 364 to handle the relocations for a section. 365 366 The relocs are always passed as Rela structures; if the section 367 actually uses Rel structures, the r_addend field will always be 368 zero. 369 370 This function is responsible for adjusting the section contents as 371 necessary, and (if using Rela relocs and generating a relocatable 372 output file) adjusting the reloc addend as necessary. 373 374 This function does not have to worry about setting the reloc 375 address or the reloc symbol index. 376 377 LOCAL_SYMS is a pointer to the swapped in local symbols. 378 379 LOCAL_SECTIONS is an array giving the section in the input file 380 corresponding to the st_shndx field of each local symbol. 381 382 The global hash table entry for the global symbols can be found 383 via elf_sym_hashes (input_bfd). 384 385 When generating relocatable output, this function must handle 386 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 387 going to be the section symbol corresponding to the output 388 section, which means that the addend must be adjusted 389 accordingly. */ 390 391 static int 392 m32c_elf_relocate_section 393 (bfd * output_bfd ATTRIBUTE_UNUSED, 394 struct bfd_link_info * info, 395 bfd * input_bfd, 396 asection * input_section, 397 bfd_byte * contents, 398 Elf_Internal_Rela * relocs, 399 Elf_Internal_Sym * local_syms, 400 asection ** local_sections) 401 { 402 Elf_Internal_Shdr * symtab_hdr; 403 struct elf_link_hash_entry ** sym_hashes; 404 Elf_Internal_Rela * rel; 405 Elf_Internal_Rela * relend; 406 asection *splt; 407 408 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; 409 sym_hashes = elf_sym_hashes (input_bfd); 410 relend = relocs + input_section->reloc_count; 411 412 splt = elf_hash_table (info)->splt; 413 414 for (rel = relocs; rel < relend; rel ++) 415 { 416 reloc_howto_type * howto; 417 unsigned long r_symndx; 418 Elf_Internal_Sym * sym; 419 asection * sec; 420 struct elf_link_hash_entry * h; 421 bfd_vma relocation; 422 bfd_reloc_status_type r; 423 const char * name = NULL; 424 int r_type; 425 426 r_type = ELF32_R_TYPE (rel->r_info); 427 428 /* These are only used for relaxing; we don't actually relocate 429 anything with them, so skip them. */ 430 if (r_type == R_M32C_RL_JUMP 431 || r_type == R_M32C_RL_1ADDR 432 || r_type == R_M32C_RL_2ADDR) 433 continue; 434 435 r_symndx = ELF32_R_SYM (rel->r_info); 436 437 howto = m32c_elf_howto_table + ELF32_R_TYPE (rel->r_info); 438 h = NULL; 439 sym = NULL; 440 sec = NULL; 441 relocation = 0; 442 443 if (r_symndx < symtab_hdr->sh_info) 444 { 445 sym = local_syms + r_symndx; 446 sec = local_sections [r_symndx]; 447 relocation = (sec->output_section->vma 448 + sec->output_offset 449 + sym->st_value); 450 451 name = bfd_elf_string_from_elf_section 452 (input_bfd, symtab_hdr->sh_link, sym->st_name); 453 name = sym->st_name == 0 ? bfd_section_name (sec) : name; 454 } 455 else 456 { 457 h = sym_hashes [r_symndx - symtab_hdr->sh_info]; 458 459 if (info->wrap_hash != NULL 460 && (input_section->flags & SEC_DEBUGGING) != 0) 461 h = ((struct elf_link_hash_entry *) 462 unwrap_hash_lookup (info, input_bfd, &h->root)); 463 464 while (h->root.type == bfd_link_hash_indirect 465 || h->root.type == bfd_link_hash_warning) 466 h = (struct elf_link_hash_entry *) h->root.u.i.link; 467 468 name = h->root.root.string; 469 470 if (h->root.type == bfd_link_hash_defined 471 || h->root.type == bfd_link_hash_defweak) 472 { 473 sec = h->root.u.def.section; 474 relocation = (h->root.u.def.value 475 + sec->output_section->vma 476 + sec->output_offset); 477 } 478 else if (h->root.type == bfd_link_hash_undefweak) 479 ; 480 else if (!bfd_link_relocatable (info)) 481 (*info->callbacks->undefined_symbol) (info, h->root.root.string, 482 input_bfd, input_section, 483 rel->r_offset, true); 484 } 485 486 if (sec != NULL && discarded_section (sec)) 487 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 488 rel, 1, relend, howto, 0, contents); 489 490 if (bfd_link_relocatable (info)) 491 { 492 /* This is a relocatable link. We don't have to change 493 anything, unless the reloc is against a section symbol, 494 in which case we have to adjust according to where the 495 section symbol winds up in the output section. */ 496 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) 497 rel->r_addend += sec->output_offset; 498 continue; 499 } 500 501 switch (ELF32_R_TYPE (rel->r_info)) 502 { 503 case R_M32C_16: 504 { 505 bfd_vma *plt_offset; 506 507 if (h != NULL) 508 plt_offset = &h->plt.offset; 509 else 510 plt_offset = elf_local_got_offsets (input_bfd) + r_symndx; 511 512 /* printf("%s: rel %x plt %d\n", h ? h->root.root.string : "(none)", 513 relocation, *plt_offset);*/ 514 if (relocation <= 0xffff) 515 { 516 /* If the symbol is in range for a 16-bit address, we should 517 have deallocated the plt entry in relax_section. */ 518 BFD_ASSERT (*plt_offset == (bfd_vma) -1); 519 } 520 else 521 { 522 /* If the symbol is out of range for a 16-bit address, 523 we must have allocated a plt entry. */ 524 BFD_ASSERT (*plt_offset != (bfd_vma) -1); 525 526 /* If this is the first time we've processed this symbol, 527 fill in the plt entry with the correct symbol address. */ 528 if ((*plt_offset & 1) == 0) 529 { 530 unsigned int x; 531 532 x = 0x000000fc; /* jmpf */ 533 x |= (relocation << 8) & 0xffffff00; 534 bfd_put_32 (input_bfd, x, splt->contents + *plt_offset); 535 *plt_offset |= 1; 536 } 537 538 relocation = (splt->output_section->vma 539 + splt->output_offset 540 + (*plt_offset & -2)); 541 if (name) 542 { 543 char *newname = bfd_malloc (strlen(name)+5); 544 strcpy (newname, name); 545 strcat(newname, ".plt"); 546 _bfd_generic_link_add_one_symbol (info, 547 input_bfd, 548 newname, 549 BSF_FUNCTION | BSF_WEAK, 550 splt, 551 (*plt_offset & -2), 552 0, 553 1, 554 0, 555 0); 556 } 557 } 558 } 559 break; 560 561 case R_M32C_HI8: 562 case R_M32C_HI16: 563 relocation >>= 16; 564 break; 565 } 566 567 #if 0 568 printf ("relocate %s at %06lx relocation %06lx addend %ld ", 569 m32c_elf_howto_table[ELF32_R_TYPE(rel->r_info)].name, 570 rel->r_offset + input_section->output_section->vma + input_section->output_offset, 571 relocation, rel->r_addend); 572 { 573 int i; 574 for (i=0; i<4; i++) 575 printf (" %02x", contents[rel->r_offset+i]); 576 printf ("\n"); 577 } 578 #endif 579 switch (ELF32_R_TYPE(rel->r_info)) 580 { 581 case R_M32C_24: 582 /* Like m32c_apply_reloc_24, we must handle this one separately. */ 583 relocation += rel->r_addend; 584 585 /* Sanity check the address. */ 586 if (rel->r_offset + 3 587 > bfd_get_section_limit_octets (input_bfd, input_section)) 588 r = bfd_reloc_outofrange; 589 else 590 { 591 bfd_put_8 (input_bfd, relocation & 0xff, contents + rel->r_offset); 592 bfd_put_8 (input_bfd, (relocation >> 8) & 0xff, contents + rel->r_offset + 1); 593 bfd_put_8 (input_bfd, (relocation >> 16) & 0xff, contents + rel->r_offset + 2); 594 r = bfd_reloc_ok; 595 } 596 597 break; 598 599 default: 600 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 601 contents, rel->r_offset, relocation, 602 rel->r_addend); 603 break; 604 } 605 606 if (r != bfd_reloc_ok) 607 { 608 const char * msg = (const char *) NULL; 609 610 switch (r) 611 { 612 case bfd_reloc_overflow: 613 (*info->callbacks->reloc_overflow) 614 (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0, 615 input_bfd, input_section, rel->r_offset); 616 break; 617 618 case bfd_reloc_undefined: 619 (*info->callbacks->undefined_symbol) 620 (info, name, input_bfd, input_section, rel->r_offset, true); 621 break; 622 623 case bfd_reloc_outofrange: 624 msg = _("internal error: out of range error"); 625 break; 626 627 case bfd_reloc_notsupported: 628 msg = _("internal error: unsupported relocation error"); 629 break; 630 631 case bfd_reloc_dangerous: 632 msg = _("internal error: dangerous relocation"); 633 break; 634 635 default: 636 msg = _("internal error: unknown error"); 637 break; 638 } 639 640 if (msg) 641 (*info->callbacks->warning) (info, msg, name, input_bfd, 642 input_section, rel->r_offset); 643 } 644 } 645 646 return true; 647 } 648 649 /* We support 16-bit pointers to code above 64k by generating a thunk 650 below 64k containing a JMP instruction to the final address. */ 651 652 static bool 653 m32c_elf_check_relocs 654 (bfd * abfd, 655 struct bfd_link_info * info, 656 asection * sec, 657 const Elf_Internal_Rela * relocs) 658 { 659 Elf_Internal_Shdr * symtab_hdr; 660 struct elf_link_hash_entry ** sym_hashes; 661 const Elf_Internal_Rela * rel; 662 const Elf_Internal_Rela * rel_end; 663 bfd_vma *local_plt_offsets; 664 asection *splt; 665 bfd *dynobj; 666 667 if (bfd_link_relocatable (info)) 668 return true; 669 670 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 671 sym_hashes = elf_sym_hashes (abfd); 672 local_plt_offsets = elf_local_got_offsets (abfd); 673 splt = NULL; 674 dynobj = elf_hash_table(info)->dynobj; 675 676 rel_end = relocs + sec->reloc_count; 677 for (rel = relocs; rel < rel_end; rel++) 678 { 679 struct elf_link_hash_entry *h; 680 unsigned long r_symndx; 681 bfd_vma *offset; 682 683 r_symndx = ELF32_R_SYM (rel->r_info); 684 if (r_symndx < symtab_hdr->sh_info) 685 h = NULL; 686 else 687 { 688 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 689 while (h->root.type == bfd_link_hash_indirect 690 || h->root.type == bfd_link_hash_warning) 691 h = (struct elf_link_hash_entry *) h->root.u.i.link; 692 } 693 694 switch (ELF32_R_TYPE (rel->r_info)) 695 { 696 /* This relocation describes a 16-bit pointer to a function. 697 We may need to allocate a thunk in low memory; reserve memory 698 for it now. */ 699 case R_M32C_16: 700 if (dynobj == NULL) 701 elf_hash_table (info)->dynobj = dynobj = abfd; 702 splt = elf_hash_table (info)->splt; 703 if (splt == NULL) 704 { 705 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 706 | SEC_IN_MEMORY | SEC_LINKER_CREATED 707 | SEC_READONLY | SEC_CODE); 708 splt = bfd_make_section_anyway_with_flags (dynobj, ".plt", 709 flags); 710 elf_hash_table (info)->splt = splt; 711 if (splt == NULL 712 || !bfd_set_section_alignment (splt, 1)) 713 return false; 714 } 715 716 if (h != NULL) 717 offset = &h->plt.offset; 718 else 719 { 720 if (local_plt_offsets == NULL) 721 { 722 size_t size; 723 unsigned int i; 724 725 size = symtab_hdr->sh_info * sizeof (bfd_vma); 726 local_plt_offsets = (bfd_vma *) bfd_alloc (abfd, size); 727 if (local_plt_offsets == NULL) 728 return false; 729 elf_local_got_offsets (abfd) = local_plt_offsets; 730 731 for (i = 0; i < symtab_hdr->sh_info; i++) 732 local_plt_offsets[i] = (bfd_vma) -1; 733 } 734 offset = &local_plt_offsets[r_symndx]; 735 } 736 737 if (*offset == (bfd_vma) -1) 738 { 739 *offset = splt->size; 740 splt->size += 4; 741 } 742 break; 743 } 744 } 745 746 return true; 747 } 748 749 /* This must exist if dynobj is ever set. */ 750 751 static bool 752 m32c_elf_finish_dynamic_sections (bfd *abfd ATTRIBUTE_UNUSED, 753 struct bfd_link_info *info) 754 { 755 bfd *dynobj = elf_hash_table (info)->dynobj; 756 asection *splt = elf_hash_table (info)->splt; 757 758 /* As an extra sanity check, verify that all plt entries have 759 been filled in. */ 760 761 if (dynobj != NULL && splt != NULL) 762 { 763 bfd_byte *contents = splt->contents; 764 unsigned int i, size = splt->size; 765 for (i = 0; i < size; i += 4) 766 { 767 unsigned int x = bfd_get_32 (dynobj, contents + i); 768 BFD_ASSERT (x != 0); 769 } 770 } 771 772 return true; 773 } 774 775 static bool 776 m32c_elf_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 777 struct bfd_link_info *info) 778 { 779 bfd *dynobj; 780 asection *splt; 781 782 if (bfd_link_relocatable (info)) 783 return true; 784 785 dynobj = elf_hash_table (info)->dynobj; 786 if (dynobj == NULL) 787 return true; 788 789 splt = elf_hash_table (info)->splt; 790 BFD_ASSERT (splt != NULL); 791 792 splt->contents = (bfd_byte *) bfd_zalloc (dynobj, splt->size); 793 if (splt->contents == NULL) 794 return false; 795 796 return true; 797 } 798 799 /* Function to set the ELF flag bits. */ 800 801 static bool 802 m32c_elf_set_private_flags (bfd *abfd, flagword flags) 803 { 804 elf_elfheader (abfd)->e_flags = flags; 805 elf_flags_init (abfd) = true; 806 return true; 807 } 808 809 /* Merge backend specific data from an object file to the output 810 object file when linking. */ 811 812 static bool 813 m32c_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 814 { 815 bfd *obfd = info->output_bfd; 816 flagword old_flags, old_partial; 817 flagword new_flags, new_partial; 818 bool error = false; 819 char new_opt[80]; 820 char old_opt[80]; 821 822 new_opt[0] = old_opt[0] = '\0'; 823 new_flags = elf_elfheader (ibfd)->e_flags; 824 old_flags = elf_elfheader (obfd)->e_flags; 825 826 #ifdef DEBUG 827 _bfd_error_handler 828 ("old_flags = 0x%.8x, new_flags = 0x%.8x, init = %s, filename = %s", 829 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no", 830 bfd_get_filename (ibfd)); 831 #endif 832 833 if (!elf_flags_init (obfd)) 834 { 835 /* First call, no flags set. */ 836 elf_flags_init (obfd) = true; 837 elf_elfheader (obfd)->e_flags = new_flags; 838 } 839 840 else if (new_flags == old_flags) 841 /* Compatible flags are ok. */ 842 ; 843 844 else /* Possibly incompatible flags. */ 845 { 846 /* Warn if different cpu is used (allow a specific cpu to override 847 the generic cpu). */ 848 new_partial = (new_flags & EF_M32C_CPU_MASK); 849 old_partial = (old_flags & EF_M32C_CPU_MASK); 850 if (new_partial == old_partial) 851 ; 852 853 else 854 { 855 switch (new_partial) 856 { 857 default: strcat (new_opt, " -m16c"); break; 858 case EF_M32C_CPU_M16C: strcat (new_opt, " -m16c"); break; 859 case EF_M32C_CPU_M32C: strcat (new_opt, " -m32c"); break; 860 } 861 862 switch (old_partial) 863 { 864 default: strcat (old_opt, " -m16c"); break; 865 case EF_M32C_CPU_M16C: strcat (old_opt, " -m16c"); break; 866 case EF_M32C_CPU_M32C: strcat (old_opt, " -m32c"); break; 867 } 868 } 869 870 /* Print out any mismatches from above. */ 871 if (new_opt[0]) 872 { 873 error = true; 874 _bfd_error_handler 875 /* xgettext:c-format */ 876 (_("%pB: compiled with %s and linked with modules compiled with %s"), 877 ibfd, new_opt, old_opt); 878 } 879 880 new_flags &= ~ EF_M32C_ALL_FLAGS; 881 old_flags &= ~ EF_M32C_ALL_FLAGS; 882 883 /* Warn about any other mismatches. */ 884 if (new_flags != old_flags) 885 { 886 error = true; 887 _bfd_error_handler 888 /* xgettext:c-format */ 889 (_("%pB: uses different e_flags (%#x) fields" 890 " than previous modules (%#x)"), 891 ibfd, new_flags, old_flags); 892 } 893 } 894 895 if (error) 896 bfd_set_error (bfd_error_bad_value); 897 898 return !error; 899 } 900 901 902 static bool 903 m32c_elf_print_private_bfd_data (bfd *abfd, void *ptr) 904 { 905 FILE *file = (FILE *) ptr; 906 flagword flags; 907 908 BFD_ASSERT (abfd != NULL && ptr != NULL); 909 910 /* Print normal ELF private data. */ 911 _bfd_elf_print_private_bfd_data (abfd, ptr); 912 913 flags = elf_elfheader (abfd)->e_flags; 914 fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags); 915 916 switch (flags & EF_M32C_CPU_MASK) 917 { 918 default: break; 919 case EF_M32C_CPU_M16C: fprintf (file, " -m16c"); break; 920 case EF_M32C_CPU_M32C: fprintf (file, " -m32c"); break; 921 } 922 923 fputc ('\n', file); 924 return true; 925 } 926 927 /* Return the MACH for an e_flags value. */ 928 929 static int 930 elf32_m32c_machine (bfd *abfd) 931 { 932 switch (elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK) 933 { 934 case EF_M32C_CPU_M16C: return bfd_mach_m16c; 935 case EF_M32C_CPU_M32C: return bfd_mach_m32c; 936 } 937 938 return bfd_mach_m16c; 939 } 940 941 static bool 942 m32c_elf_object_p (bfd *abfd) 943 { 944 bfd_default_set_arch_mach (abfd, bfd_arch_m32c, 945 elf32_m32c_machine (abfd)); 946 return true; 947 } 948 949 950 #ifdef DEBUG 951 void 952 dump_symtab (bfd * abfd, void *internal_syms, void *external_syms) 953 { 954 size_t locsymcount; 955 Elf_Internal_Sym *isymbuf; 956 Elf_Internal_Sym *isymend; 957 Elf_Internal_Sym *isym; 958 Elf_Internal_Shdr *symtab_hdr; 959 bool free_internal = 0, free_external = 0; 960 char * st_info_str; 961 char * st_info_stb_str; 962 char * st_other_str; 963 char * st_shndx_str; 964 965 if (! internal_syms) 966 { 967 internal_syms = bfd_malloc (1000); 968 free_internal = 1; 969 } 970 if (! external_syms) 971 { 972 external_syms = bfd_malloc (1000); 973 free_external = 1; 974 } 975 976 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 977 locsymcount = symtab_hdr->sh_size / get_elf_backend_data(abfd)->s->sizeof_sym; 978 if (free_internal) 979 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 980 symtab_hdr->sh_info, 0, 981 internal_syms, external_syms, NULL); 982 else 983 isymbuf = internal_syms; 984 isymend = isymbuf + locsymcount; 985 986 for (isym = isymbuf ; isym < isymend ; isym++) 987 { 988 switch (ELF_ST_TYPE (isym->st_info)) 989 { 990 case STT_FUNC: 991 st_info_str = "STT_FUNC"; 992 break; 993 994 case STT_SECTION: 995 st_info_str = "STT_SECTION"; 996 break; 997 998 case STT_FILE: 999 st_info_str = "STT_FILE"; 1000 break; 1001 1002 case STT_OBJECT: 1003 st_info_str = "STT_OBJECT"; 1004 break; 1005 1006 case STT_TLS: 1007 st_info_str = "STT_TLS"; 1008 break; 1009 1010 default: 1011 st_info_str = ""; 1012 } 1013 1014 switch (ELF_ST_BIND (isym->st_info)) 1015 { 1016 case STB_LOCAL: 1017 st_info_stb_str = "STB_LOCAL"; 1018 break; 1019 1020 case STB_GLOBAL: 1021 st_info_stb_str = "STB_GLOBAL"; 1022 break; 1023 1024 default: 1025 st_info_stb_str = ""; 1026 } 1027 1028 switch (ELF_ST_VISIBILITY (isym->st_other)) 1029 { 1030 case STV_DEFAULT: 1031 st_other_str = "STV_DEFAULT"; 1032 break; 1033 1034 case STV_INTERNAL: 1035 st_other_str = "STV_INTERNAL"; 1036 break; 1037 1038 case STV_PROTECTED: 1039 st_other_str = "STV_PROTECTED"; 1040 break; 1041 1042 default: 1043 st_other_str = ""; 1044 } 1045 1046 switch (isym->st_shndx) 1047 { 1048 case SHN_ABS: 1049 st_shndx_str = "SHN_ABS"; 1050 break; 1051 1052 case SHN_COMMON: 1053 st_shndx_str = "SHN_COMMON"; 1054 break; 1055 1056 case SHN_UNDEF: 1057 st_shndx_str = "SHN_UNDEF"; 1058 break; 1059 1060 default: 1061 st_shndx_str = ""; 1062 } 1063 1064 printf ("isym = %p st_value = %lx st_size = %lx st_name = (%lu) %s " 1065 "st_info = (%d) %s %s st_other = (%d) %s st_shndx = (%d) %s\n", 1066 isym, 1067 (unsigned long) isym->st_value, 1068 (unsigned long) isym->st_size, 1069 isym->st_name, 1070 bfd_elf_string_from_elf_section (abfd, symtab_hdr->sh_link, 1071 isym->st_name), 1072 isym->st_info, st_info_str, st_info_stb_str, 1073 isym->st_other, st_other_str, 1074 isym->st_shndx, st_shndx_str); 1075 } 1076 if (free_internal) 1077 free (internal_syms); 1078 if (free_external) 1079 free (external_syms); 1080 } 1081 1082 char * 1083 m32c_get_reloc (long reloc) 1084 { 1085 if (0 <= reloc && reloc < R_M32C_max) 1086 return m32c_elf_howto_table[reloc].name; 1087 else 1088 return ""; 1089 } 1090 #endif /* DEBUG */ 1091 1092 /* Handle relaxing. */ 1093 1094 /* A subroutine of m32c_elf_relax_section. If the global symbol H 1095 is within the low 64k, remove any entry for it in the plt. */ 1096 1097 struct relax_plt_data 1098 { 1099 asection *splt; 1100 bool *again; 1101 }; 1102 1103 static bool 1104 m32c_relax_plt_check (struct elf_link_hash_entry *h, void * xdata) 1105 { 1106 struct relax_plt_data *data = (struct relax_plt_data *) xdata; 1107 1108 if (h->plt.offset != (bfd_vma) -1) 1109 { 1110 bfd_vma address; 1111 1112 if (h->root.type == bfd_link_hash_undefined 1113 || h->root.type == bfd_link_hash_undefweak) 1114 address = 0; 1115 else 1116 address = (h->root.u.def.section->output_section->vma 1117 + h->root.u.def.section->output_offset 1118 + h->root.u.def.value); 1119 1120 if (address <= 0xffff) 1121 { 1122 h->plt.offset = -1; 1123 data->splt->size -= 4; 1124 *data->again = true; 1125 } 1126 } 1127 1128 return true; 1129 } 1130 1131 /* A subroutine of m32c_elf_relax_section. If the global symbol H 1132 previously had a plt entry, give it a new entry offset. */ 1133 1134 static bool 1135 m32c_relax_plt_realloc (struct elf_link_hash_entry *h, void * xdata) 1136 { 1137 bfd_vma *entry = (bfd_vma *) xdata; 1138 1139 if (h->plt.offset != (bfd_vma) -1) 1140 { 1141 h->plt.offset = *entry; 1142 *entry += 4; 1143 } 1144 1145 return true; 1146 } 1147 1148 static bool 1149 m32c_elf_relax_plt_section (asection *splt, 1150 struct bfd_link_info *info, 1151 bool *again) 1152 { 1153 struct relax_plt_data relax_plt_data; 1154 bfd *ibfd; 1155 1156 /* Assume nothing changes. */ 1157 *again = false; 1158 1159 if (bfd_link_relocatable (info)) 1160 return true; 1161 1162 /* Quick check for an empty plt. */ 1163 if (splt->size == 0) 1164 return true; 1165 1166 /* Map across all global symbols; see which ones happen to 1167 fall in the low 64k. */ 1168 relax_plt_data.splt = splt; 1169 relax_plt_data.again = again; 1170 elf_link_hash_traverse (elf_hash_table (info), m32c_relax_plt_check, 1171 &relax_plt_data); 1172 1173 /* Likewise for local symbols, though that's somewhat less convenient 1174 as we have to walk the list of input bfds and swap in symbol data. */ 1175 for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link.next) 1176 { 1177 bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd); 1178 Elf_Internal_Shdr *symtab_hdr; 1179 Elf_Internal_Sym *isymbuf = NULL; 1180 unsigned int idx; 1181 1182 if (! local_plt_offsets) 1183 continue; 1184 1185 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 1186 if (symtab_hdr->sh_info != 0) 1187 { 1188 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 1189 if (isymbuf == NULL) 1190 isymbuf = bfd_elf_get_elf_syms (ibfd, symtab_hdr, 1191 symtab_hdr->sh_info, 0, 1192 NULL, NULL, NULL); 1193 if (isymbuf == NULL) 1194 return false; 1195 } 1196 1197 for (idx = 0; idx < symtab_hdr->sh_info; ++idx) 1198 { 1199 Elf_Internal_Sym *isym; 1200 asection *tsec; 1201 bfd_vma address; 1202 1203 if (local_plt_offsets[idx] == (bfd_vma) -1) 1204 continue; 1205 1206 isym = &isymbuf[idx]; 1207 if (isym->st_shndx == SHN_UNDEF) 1208 continue; 1209 else if (isym->st_shndx == SHN_ABS) 1210 tsec = bfd_abs_section_ptr; 1211 else if (isym->st_shndx == SHN_COMMON) 1212 tsec = bfd_com_section_ptr; 1213 else 1214 tsec = bfd_section_from_elf_index (ibfd, isym->st_shndx); 1215 1216 address = (tsec->output_section->vma 1217 + tsec->output_offset 1218 + isym->st_value); 1219 if (address <= 0xffff) 1220 { 1221 local_plt_offsets[idx] = -1; 1222 splt->size -= 4; 1223 *again = true; 1224 } 1225 } 1226 1227 if (isymbuf != NULL 1228 && symtab_hdr->contents != (unsigned char *) isymbuf) 1229 { 1230 if (! info->keep_memory) 1231 free (isymbuf); 1232 else 1233 { 1234 /* Cache the symbols for elf_link_input_bfd. */ 1235 symtab_hdr->contents = (unsigned char *) isymbuf; 1236 } 1237 } 1238 } 1239 1240 /* If we changed anything, walk the symbols again to reallocate 1241 .plt entry addresses. */ 1242 if (*again && splt->size > 0) 1243 { 1244 bfd_vma entry = 0; 1245 1246 elf_link_hash_traverse (elf_hash_table (info), 1247 m32c_relax_plt_realloc, &entry); 1248 1249 for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link.next) 1250 { 1251 bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd); 1252 unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info; 1253 unsigned int idx; 1254 1255 if (! local_plt_offsets) 1256 continue; 1257 1258 for (idx = 0; idx < nlocals; ++idx) 1259 if (local_plt_offsets[idx] != (bfd_vma) -1) 1260 { 1261 local_plt_offsets[idx] = entry; 1262 entry += 4; 1263 } 1264 } 1265 } 1266 1267 return true; 1268 } 1269 1270 static int 1271 compare_reloc (const void *e1, const void *e2) 1272 { 1273 const Elf_Internal_Rela *i1 = (const Elf_Internal_Rela *) e1; 1274 const Elf_Internal_Rela *i2 = (const Elf_Internal_Rela *) e2; 1275 1276 if (i1->r_offset == i2->r_offset) 1277 return 0; 1278 else 1279 return i1->r_offset < i2->r_offset ? -1 : 1; 1280 } 1281 1282 #define OFFSET_FOR_RELOC(rel) m32c_offset_for_reloc (abfd, rel, symtab_hdr, shndx_buf, intsyms) 1283 static bfd_vma 1284 m32c_offset_for_reloc (bfd *abfd, 1285 Elf_Internal_Rela *rel, 1286 Elf_Internal_Shdr *symtab_hdr, 1287 bfd_byte *shndx_buf ATTRIBUTE_UNUSED, 1288 Elf_Internal_Sym *intsyms) 1289 { 1290 bfd_vma symval; 1291 1292 /* Get the value of the symbol referred to by the reloc. */ 1293 if (ELF32_R_SYM (rel->r_info) < symtab_hdr->sh_info) 1294 { 1295 /* A local symbol. */ 1296 Elf_Internal_Sym *isym; 1297 asection *ssec; 1298 1299 isym = intsyms + ELF32_R_SYM (rel->r_info); 1300 ssec = bfd_section_from_elf_index (abfd, isym->st_shndx); 1301 symval = isym->st_value; 1302 if (ssec) 1303 symval += ssec->output_section->vma 1304 + ssec->output_offset; 1305 } 1306 else 1307 { 1308 unsigned long indx; 1309 struct elf_link_hash_entry *h; 1310 1311 /* An external symbol. */ 1312 indx = ELF32_R_SYM (rel->r_info) - symtab_hdr->sh_info; 1313 h = elf_sym_hashes (abfd)[indx]; 1314 BFD_ASSERT (h != NULL); 1315 1316 if (h->root.type != bfd_link_hash_defined 1317 && h->root.type != bfd_link_hash_defweak) 1318 /* This appears to be a reference to an undefined 1319 symbol. Just ignore it--it will be caught by the 1320 regular reloc processing. */ 1321 return 0; 1322 1323 symval = (h->root.u.def.value 1324 + h->root.u.def.section->output_section->vma 1325 + h->root.u.def.section->output_offset); 1326 } 1327 return symval; 1328 } 1329 1330 static int bytes_saved = 0; 1331 1332 static int bytes_to_reloc[] = { 1333 R_M32C_NONE, 1334 R_M32C_8, 1335 R_M32C_16, 1336 R_M32C_24, 1337 R_M32C_32 1338 }; 1339 1340 /* What we use the bits in a relax reloc addend (R_M32C_RL_*) for. */ 1341 1342 /* Mask for the number of relocs associated with this insn. */ 1343 #define RLA_RELOCS 0x0000000f 1344 /* Number of bytes gas emitted (before gas's relaxing) */ 1345 #define RLA_NBYTES 0x00000ff0 1346 1347 /* If the displacement is within the given range and the new encoding 1348 differs from the old encoding (the index), then the insn can be 1349 relaxed to the new encoding. */ 1350 typedef const struct { 1351 int bytes; 1352 unsigned int max_disp; 1353 unsigned char new_encoding; 1354 } EncodingTable; 1355 1356 static EncodingTable m16c_addr_encodings[] = { 1357 { 0, 0, 0 }, /* R0 */ 1358 { 0, 0, 1 }, /* R1 */ 1359 { 0, 0, 2 }, /* R2 */ 1360 { 0, 0, 3 }, /* R3 */ 1361 { 0, 0, 4 }, /* A0 */ 1362 { 0, 0, 5 }, /* A1 */ 1363 { 0, 0, 6 }, /* [A0] */ 1364 { 0, 0, 7 }, /* [A1] */ 1365 { 1, 0, 6 }, /* udsp:8[A0] */ 1366 { 1, 0, 7 }, /* udsp:8[A1] */ 1367 { 1, 0, 10 }, /* udsp:8[SB] */ 1368 { 1, 0, 11 }, /* sdsp:8[FB] */ 1369 { 2, 255, 8 }, /* udsp:16[A0] */ 1370 { 2, 255, 9 }, /* udsp:16[A1] */ 1371 { 2, 255, 10 }, /* udsp:16[SB] */ 1372 { 2, 0, 15 }, /* abs:16 */ 1373 }; 1374 1375 static EncodingTable m16c_jmpaddr_encodings[] = { 1376 { 0, 0, 0 }, /* R0 */ 1377 { 0, 0, 1 }, /* R1 */ 1378 { 0, 0, 2 }, /* R2 */ 1379 { 0, 0, 3 }, /* R3 */ 1380 { 0, 0, 4 }, /* A0 */ 1381 { 0, 0, 5 }, /* A1 */ 1382 { 0, 0, 6 }, /* [A0] */ 1383 { 0, 0, 7 }, /* [A1] */ 1384 { 1, 0, 6 }, /* udsp:8[A0] */ 1385 { 1, 0, 7 }, /* udsp:8[A1] */ 1386 { 1, 0, 10 }, /* udsp:8[SB] */ 1387 { 1, 0, 11 }, /* sdsp:8[FB] */ 1388 { 3, 255, 8 }, /* udsp:20[A0] */ 1389 { 3, 255, 9 }, /* udsp:20[A1] */ 1390 { 2, 255, 10 }, /* udsp:16[SB] */ 1391 { 2, 0, 15 }, /* abs:16 */ 1392 }; 1393 1394 static EncodingTable m32c_addr_encodings[] = { 1395 { 0, 0, 0 }, /* [A0] */ 1396 { 0, 0, 1 }, /* [A1] */ 1397 { 0, 0, 2 }, /* A0 */ 1398 { 0, 0, 3 }, /* A1 */ 1399 { 1, 0, 0 }, /* udsp:8[A0] */ 1400 { 1, 0, 1 }, /* udsp:8[A1] */ 1401 { 1, 0, 6 }, /* udsp:8[SB] */ 1402 { 1, 0, 7 }, /* sdsp:8[FB] */ 1403 { 2, 255, 4 }, /* udsp:16[A0] */ 1404 { 2, 255, 5 }, /* udsp:16[A1] */ 1405 { 2, 255, 6 }, /* udsp:16[SB] */ 1406 { 2, 127, 7 }, /* sdsp:16[FB] */ 1407 { 3, 65535, 8 }, /* udsp:24[A0] */ 1408 { 3, 65535, 9 }, /* udsp:24[A1] */ 1409 { 3, 65535, 15 }, /* abs24 */ 1410 { 2, 0, 15 }, /* abs16 */ 1411 { 0, 0, 16 }, /* R2 */ 1412 { 0, 0, 17 }, /* R3 */ 1413 { 0, 0, 18 }, /* R0 */ 1414 { 0, 0, 19 }, /* R1 */ 1415 { 0, 0, 20 }, /* */ 1416 { 0, 0, 21 }, /* */ 1417 { 0, 0, 22 }, /* */ 1418 { 0, 0, 23 }, /* */ 1419 { 0, 0, 24 }, /* */ 1420 { 0, 0, 25 }, /* */ 1421 { 0, 0, 26 }, /* */ 1422 { 0, 0, 27 }, /* */ 1423 { 0, 0, 28 }, /* */ 1424 { 0, 0, 29 }, /* */ 1425 { 0, 0, 30 }, /* */ 1426 { 0, 0, 31 }, /* */ 1427 }; 1428 1429 static bool 1430 m32c_elf_relax_section (bfd *abfd, 1431 asection *sec, 1432 struct bfd_link_info *link_info, 1433 bool *again) 1434 { 1435 Elf_Internal_Shdr *symtab_hdr; 1436 Elf_Internal_Shdr *shndx_hdr; 1437 Elf_Internal_Rela *internal_relocs; 1438 Elf_Internal_Rela *free_relocs = NULL; 1439 Elf_Internal_Rela *irel, *irelend, *srel; 1440 bfd_byte * contents = NULL; 1441 bfd_byte * free_contents = NULL; 1442 Elf_Internal_Sym *intsyms = NULL; 1443 Elf_Internal_Sym *free_intsyms = NULL; 1444 bfd_byte *shndx_buf = NULL; 1445 int machine; 1446 1447 if (is_elf_hash_table (link_info->hash) 1448 && abfd == elf_hash_table (link_info)->dynobj 1449 && (sec->flags & SEC_LINKER_CREATED) != 0 1450 && strcmp (sec->name, ".plt") == 0) 1451 return m32c_elf_relax_plt_section (sec, link_info, again); 1452 1453 /* Assume nothing changes. */ 1454 *again = false; 1455 1456 machine = elf32_m32c_machine (abfd); 1457 1458 /* We don't have to do anything for a relocatable link, if 1459 this section does not have relocs, or if this is not a 1460 code section. */ 1461 if (bfd_link_relocatable (link_info) 1462 || (sec->flags & SEC_RELOC) == 0 1463 || sec->reloc_count == 0 1464 || (sec->flags & SEC_CODE) == 0) 1465 return true; 1466 1467 symtab_hdr = & elf_symtab_hdr (abfd); 1468 if (elf_symtab_shndx_list (abfd)) 1469 shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr; 1470 else 1471 shndx_hdr = NULL; 1472 1473 /* Get the section contents. */ 1474 if (elf_section_data (sec)->this_hdr.contents != NULL) 1475 contents = elf_section_data (sec)->this_hdr.contents; 1476 /* Go get them off disk. */ 1477 else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) 1478 goto error_return; 1479 1480 /* Read this BFD's symbols. */ 1481 /* Get cached copy if it exists. */ 1482 if (symtab_hdr->contents != NULL) 1483 { 1484 intsyms = (Elf_Internal_Sym *) symtab_hdr->contents; 1485 } 1486 else 1487 { 1488 intsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, symtab_hdr->sh_info, 0, NULL, NULL, NULL); 1489 symtab_hdr->contents = (bfd_byte *) intsyms; 1490 } 1491 1492 if (shndx_hdr && shndx_hdr->sh_size != 0) 1493 { 1494 size_t amt; 1495 1496 if (_bfd_mul_overflow (symtab_hdr->sh_info, 1497 sizeof (Elf_External_Sym_Shndx), &amt)) 1498 { 1499 bfd_set_error (bfd_error_file_too_big); 1500 goto error_return; 1501 } 1502 if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0) 1503 goto error_return; 1504 shndx_buf = _bfd_malloc_and_read (abfd, amt, amt); 1505 if (shndx_buf == NULL) 1506 goto error_return; 1507 shndx_hdr->contents = shndx_buf; 1508 } 1509 1510 /* Get a copy of the native relocations. */ 1511 internal_relocs = (_bfd_elf_link_read_relocs 1512 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, 1513 link_info->keep_memory)); 1514 if (internal_relocs == NULL) 1515 goto error_return; 1516 if (! link_info->keep_memory) 1517 free_relocs = internal_relocs; 1518 1519 /* The RL_ relocs must be just before the operand relocs they go 1520 with, so we must sort them to guarantee this. */ 1521 qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), 1522 compare_reloc); 1523 1524 /* Walk through them looking for relaxing opportunities. */ 1525 irelend = internal_relocs + sec->reloc_count; 1526 1527 for (irel = internal_relocs; irel < irelend; irel++) 1528 { 1529 bfd_vma symval; 1530 unsigned char *insn, *gap, *einsn; 1531 bfd_vma pc; 1532 bfd_signed_vma pcrel; 1533 int relax_relocs; 1534 int gap_size; 1535 int new_type; 1536 int posn; 1537 int enc; 1538 EncodingTable *enctbl; 1539 EncodingTable *e; 1540 1541 if (ELF32_R_TYPE(irel->r_info) != R_M32C_RL_JUMP 1542 && ELF32_R_TYPE(irel->r_info) != R_M32C_RL_1ADDR 1543 && ELF32_R_TYPE(irel->r_info) != R_M32C_RL_2ADDR) 1544 continue; 1545 1546 srel = irel; 1547 1548 /* There will always be room for the relaxed insn, since it is smaller 1549 than the one it would replace. */ 1550 BFD_ASSERT (irel->r_offset < sec->size); 1551 1552 insn = contents + irel->r_offset; 1553 relax_relocs = irel->r_addend % 16; 1554 1555 /* Ok, we only have three relocs we care about, and they're all 1556 fake. The lower four bits of the addend is always the number 1557 of following relocs (hence the qsort above) that are assigned 1558 to this opcode. The next 8 bits of the addend indicates the 1559 number of bytes in the insn. We use the rest of them 1560 ourselves as flags for the more expensive operations (defines 1561 above). The three relocs are: 1562 1563 RL_JUMP: This marks all direct jump insns. We check the 1564 displacement and replace them with shorter jumps if 1565 they're in range. We also use this to find JMP.S 1566 insns and manually shorten them when we delete bytes. 1567 We have to decode these insns to figure out what to 1568 do. 1569 1570 RL_1ADDR: This is a :G or :Q insn, which has a single 1571 "standard" operand. We have to extract the type 1572 field, see if it's a wide displacement, then figure 1573 out if we can replace it with a narrow displacement. 1574 We don't have to decode these insns. 1575 1576 RL_2ADDR: Similarly, but two "standard" operands. Note that 1577 r_addend may still be 1, as standard operands don't 1578 always have displacements. Gas shouldn't give us one 1579 with zero operands, but since we don't know which one 1580 has the displacement, we check them both anyway. 1581 1582 These all point to the beginning of the insn itself, not the 1583 operands. 1584 1585 Note that we only relax one step at a time, relying on the 1586 linker to call us repeatedly. Thus, there is no code for 1587 JMP.A->JMP.B although that will happen in two steps. 1588 Likewise, for 2ADDR relaxes, we do one operand per cycle. 1589 */ 1590 1591 /* Get the value of the symbol referred to by the reloc. Just 1592 in case this is the last reloc in the list, use the RL's 1593 addend to choose between this reloc (no addend) or the next 1594 (yes addend, which means at least one following reloc). */ 1595 srel = irel + (relax_relocs ? 1 : 0); 1596 symval = OFFSET_FOR_RELOC (srel); 1597 1598 /* Setting gap_size nonzero is the flag which means "something 1599 shrunk". */ 1600 gap_size = 0; 1601 gap = NULL; 1602 new_type = ELF32_R_TYPE(srel->r_info); 1603 1604 pc = sec->output_section->vma + sec->output_offset 1605 + srel->r_offset; 1606 pcrel = symval - pc + srel->r_addend; 1607 1608 if (machine == bfd_mach_m16c) 1609 { 1610 /* R8C / M16C */ 1611 1612 switch (ELF32_R_TYPE(irel->r_info)) 1613 { 1614 1615 case R_M32C_RL_JUMP: 1616 switch (insn[0]) 1617 { 1618 case 0xfe: /* jmp.b */ 1619 if (pcrel >= 2 && pcrel <= 9) 1620 { 1621 /* Relax JMP.B -> JMP.S. We need to get rid of 1622 the following reloc though. */ 1623 insn[0] = 0x60 | (pcrel - 2); 1624 new_type = R_M32C_NONE; 1625 irel->r_addend = 0x10; 1626 gap_size = 1; 1627 gap = insn + 1; 1628 } 1629 break; 1630 1631 case 0xf4: /* jmp.w */ 1632 /* 128 is allowed because it will be one byte closer 1633 after relaxing. Likewise for all other pc-rel 1634 jumps. */ 1635 if (pcrel <= 128 && pcrel >= -128) 1636 { 1637 /* Relax JMP.W -> JMP.B */ 1638 insn[0] = 0xfe; 1639 insn[1] = 0; 1640 new_type = R_M32C_8_PCREL; 1641 gap_size = 1; 1642 gap = insn + 2; 1643 } 1644 break; 1645 1646 case 0xfc: /* jmp.a */ 1647 if (pcrel <= 32768 && pcrel >= -32768) 1648 { 1649 /* Relax JMP.A -> JMP.W */ 1650 insn[0] = 0xf4; 1651 insn[1] = 0; 1652 insn[2] = 0; 1653 new_type = R_M32C_16_PCREL; 1654 gap_size = 1; 1655 gap = insn + 3; 1656 } 1657 break; 1658 1659 case 0xfd: /* jsr.a */ 1660 if (pcrel <= 32768 && pcrel >= -32768) 1661 { 1662 /* Relax JSR.A -> JSR.W */ 1663 insn[0] = 0xf5; 1664 insn[1] = 0; 1665 insn[2] = 0; 1666 new_type = R_M32C_16_PCREL; 1667 gap_size = 1; 1668 gap = insn + 3; 1669 } 1670 break; 1671 } 1672 break; 1673 1674 case R_M32C_RL_2ADDR: 1675 /* xxxx xxxx srce dest [src-disp] [dest-disp]*/ 1676 1677 enctbl = m16c_addr_encodings; 1678 posn = 2; 1679 enc = (insn[1] >> 4) & 0x0f; 1680 e = & enctbl[enc]; 1681 1682 if (srel->r_offset == irel->r_offset + posn 1683 && e->new_encoding != enc 1684 && symval <= e->max_disp) 1685 { 1686 insn[1] &= 0x0f; 1687 insn[1] |= e->new_encoding << 4; 1688 gap_size = e->bytes - enctbl[e->new_encoding].bytes; 1689 gap = insn + posn + enctbl[e->new_encoding].bytes; 1690 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes]; 1691 break; 1692 } 1693 if (relax_relocs == 2) 1694 srel ++; 1695 posn += e->bytes; 1696 1697 goto try_1addr_16; 1698 1699 case R_M32C_RL_1ADDR: 1700 /* xxxx xxxx xxxx dest [disp] */ 1701 1702 enctbl = m16c_addr_encodings; 1703 posn = 2; 1704 1705 /* Check the opcode for jumps. We know it's safe to 1706 do this because all 2ADDR insns are at least two 1707 bytes long. */ 1708 enc = insn[0] * 256 + insn[1]; 1709 enc &= 0xfff0; 1710 if (enc == 0x7d20 1711 || enc == 0x7d00 1712 || enc == 0x7d30 1713 || enc == 0x7d10) 1714 { 1715 enctbl = m16c_jmpaddr_encodings; 1716 } 1717 1718 try_1addr_16: 1719 /* srel, posn, and enc must be set here. */ 1720 1721 symval = OFFSET_FOR_RELOC (srel); 1722 enc = insn[1] & 0x0f; 1723 e = & enctbl[enc]; 1724 1725 if (srel->r_offset == irel->r_offset + posn 1726 && e->new_encoding != enc 1727 && symval <= e->max_disp) 1728 { 1729 insn[1] &= 0xf0; 1730 insn[1] |= e->new_encoding; 1731 gap_size = e->bytes - enctbl[e->new_encoding].bytes; 1732 gap = insn + posn + enctbl[e->new_encoding].bytes; 1733 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes]; 1734 break; 1735 } 1736 1737 break; 1738 1739 } /* Ends switch (reloc type) for m16c. */ 1740 } 1741 else /* machine == bfd_mach_m32c */ 1742 { 1743 /* M32CM / M32C */ 1744 1745 switch (ELF32_R_TYPE(irel->r_info)) 1746 { 1747 1748 case R_M32C_RL_JUMP: 1749 switch (insn[0]) 1750 { 1751 case 0xbb: /* jmp.b */ 1752 if (pcrel >= 2 && pcrel <= 9) 1753 { 1754 int p = pcrel - 2; 1755 /* Relax JMP.B -> JMP.S. We need to get rid of 1756 the following reloc though. */ 1757 insn[0] = 0x4a | ((p << 3) & 0x30) | (p & 1); 1758 new_type = R_M32C_NONE; 1759 irel->r_addend = 0x10; 1760 gap_size = 1; 1761 gap = insn + 1; 1762 } 1763 break; 1764 1765 case 0xce: /* jmp.w */ 1766 if (pcrel <= 128 && pcrel >= -128) 1767 { 1768 /* Relax JMP.W -> JMP.B */ 1769 insn[0] = 0xbb; 1770 insn[1] = 0; 1771 new_type = R_M32C_8_PCREL; 1772 gap_size = 1; 1773 gap = insn + 2; 1774 } 1775 break; 1776 1777 case 0xcc: /* jmp.a */ 1778 if (pcrel <= 32768 && pcrel >= -32768) 1779 { 1780 /* Relax JMP.A -> JMP.W */ 1781 insn[0] = 0xce; 1782 insn[1] = 0; 1783 insn[2] = 0; 1784 new_type = R_M32C_16_PCREL; 1785 gap_size = 1; 1786 gap = insn + 3; 1787 } 1788 break; 1789 1790 case 0xcd: /* jsr.a */ 1791 if (pcrel <= 32768 && pcrel >= -32768) 1792 { 1793 /* Relax JSR.A -> JSR.W */ 1794 insn[0] = 0xcf; 1795 insn[1] = 0; 1796 insn[2] = 0; 1797 new_type = R_M32C_16_PCREL; 1798 gap_size = 1; 1799 gap = insn + 3; 1800 } 1801 break; 1802 } 1803 break; 1804 1805 case R_M32C_RL_2ADDR: 1806 /* xSSS DDDx DDSS xxxx [src-disp] [dest-disp]*/ 1807 1808 einsn = insn; 1809 posn = 2; 1810 if (einsn[0] == 1) 1811 { 1812 /* prefix; remove it as far as the RL reloc is concerned. */ 1813 einsn ++; 1814 posn ++; 1815 } 1816 1817 enctbl = m32c_addr_encodings; 1818 enc = ((einsn[0] & 0x70) >> 2) | ((einsn[1] & 0x30) >> 4); 1819 e = & enctbl[enc]; 1820 1821 if (srel->r_offset == irel->r_offset + posn 1822 && e->new_encoding != enc 1823 && symval <= e->max_disp) 1824 { 1825 einsn[0] &= 0x8f; 1826 einsn[0] |= (e->new_encoding & 0x1c) << 2; 1827 einsn[1] &= 0xcf; 1828 einsn[1] |= (e->new_encoding & 0x03) << 4; 1829 gap_size = e->bytes - enctbl[e->new_encoding].bytes; 1830 gap = insn + posn + enctbl[e->new_encoding].bytes; 1831 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes]; 1832 break; 1833 } 1834 if (relax_relocs == 2) 1835 srel ++; 1836 posn += e->bytes; 1837 1838 goto try_1addr_32; 1839 1840 case R_M32C_RL_1ADDR: 1841 /* xxxx DDDx DDxx xxxx [disp] */ 1842 1843 einsn = insn; 1844 posn = 2; 1845 if (einsn[0] == 1) 1846 { 1847 /* prefix; remove it as far as the RL reloc is concerned. */ 1848 einsn ++; 1849 posn ++; 1850 } 1851 1852 enctbl = m32c_addr_encodings; 1853 1854 try_1addr_32: 1855 /* srel, posn, and enc must be set here. */ 1856 1857 symval = OFFSET_FOR_RELOC (srel); 1858 enc = ((einsn[0] & 0x0e) << 1) | ((einsn[1] & 0xc0) >> 6); 1859 e = & enctbl[enc]; 1860 1861 if (srel->r_offset == irel->r_offset + posn 1862 && e->new_encoding != enc 1863 && symval <= e->max_disp) 1864 { 1865 einsn[0] &= 0xf1; 1866 einsn[0] |= (e->new_encoding & 0x1c) >> 1; 1867 einsn[1] &= 0x3f; 1868 einsn[1] |= (e->new_encoding & 0x03) << 6; 1869 gap_size = e->bytes - enctbl[e->new_encoding].bytes; 1870 gap = insn + posn + enctbl[e->new_encoding].bytes; 1871 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes]; 1872 break; 1873 } 1874 1875 break; 1876 1877 } /* Ends switch (reloc type) for m32c. */ 1878 } 1879 1880 if (gap_size == 0) 1881 continue; 1882 1883 *again = true; 1884 1885 srel->r_info = ELF32_R_INFO (ELF32_R_SYM (srel->r_info), new_type); 1886 1887 /* Note that we've changed the relocs, section contents, etc. */ 1888 elf_section_data (sec)->relocs = internal_relocs; 1889 free_relocs = NULL; 1890 1891 elf_section_data (sec)->this_hdr.contents = contents; 1892 free_contents = NULL; 1893 1894 symtab_hdr->contents = (bfd_byte *) intsyms; 1895 free_intsyms = NULL; 1896 1897 bytes_saved += gap_size; 1898 1899 if (! m32c_elf_relax_delete_bytes(abfd, sec, gap - contents, gap_size)) 1900 goto error_return; 1901 1902 } /* next relocation */ 1903 1904 free (free_relocs); 1905 free_relocs = NULL; 1906 1907 if (free_contents != NULL) 1908 { 1909 if (! link_info->keep_memory) 1910 free (free_contents); 1911 /* Cache the section contents for elf_link_input_bfd. */ 1912 else 1913 elf_section_data (sec)->this_hdr.contents = contents; 1914 1915 free_contents = NULL; 1916 } 1917 1918 if (shndx_buf != NULL) 1919 { 1920 shndx_hdr->contents = NULL; 1921 free (shndx_buf); 1922 } 1923 1924 if (free_intsyms != NULL) 1925 { 1926 if (! link_info->keep_memory) 1927 free (free_intsyms); 1928 /* Cache the symbols for elf_link_input_bfd. */ 1929 else 1930 { 1931 symtab_hdr->contents = NULL /* (unsigned char *) intsyms*/; 1932 } 1933 1934 free_intsyms = NULL; 1935 } 1936 1937 return true; 1938 1939 error_return: 1940 free (free_relocs); 1941 free (free_contents); 1942 if (shndx_buf != NULL) 1943 { 1944 shndx_hdr->contents = NULL; 1945 free (shndx_buf); 1946 } 1947 free (free_intsyms); 1948 return false; 1949 } 1950 1951 /* Delete some bytes from a section while relaxing. */ 1952 1953 static bool 1954 m32c_elf_relax_delete_bytes (bfd *abfd, 1955 asection *sec, 1956 bfd_vma addr, 1957 int count) 1958 { 1959 Elf_Internal_Shdr *symtab_hdr; 1960 Elf_Internal_Shdr *shndx_hdr; 1961 int sec_shndx; 1962 bfd_byte *contents; 1963 Elf_Internal_Rela *irel; 1964 Elf_Internal_Rela *irelend; 1965 bfd_vma toaddr; 1966 Elf_Internal_Sym *isym; 1967 Elf_Internal_Sym *isymend; 1968 Elf_Internal_Sym *intsyms; 1969 Elf_External_Sym_Shndx *shndx_buf; 1970 Elf_External_Sym_Shndx *shndx; 1971 struct elf_link_hash_entry ** sym_hashes; 1972 struct elf_link_hash_entry ** end_hashes; 1973 unsigned int symcount; 1974 1975 contents = elf_section_data (sec)->this_hdr.contents; 1976 1977 toaddr = sec->size; 1978 1979 irel = elf_section_data (sec)->relocs; 1980 irelend = irel + sec->reloc_count; 1981 1982 /* Actually delete the bytes. */ 1983 memmove (contents + addr, contents + addr + count, (size_t) (toaddr - addr - count)); 1984 sec->size -= count; 1985 1986 /* Adjust all the relocs. */ 1987 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel ++) 1988 { 1989 /* Get the new reloc address. */ 1990 if (irel->r_offset > addr && irel->r_offset < toaddr) 1991 irel->r_offset -= count; 1992 1993 if (ELF32_R_TYPE(irel->r_info) == R_M32C_RL_JUMP 1994 && irel->r_addend == 0x10 /* one byte insn, no relocs */ 1995 && irel->r_offset + 1 < addr 1996 && irel->r_offset + 7 > addr) 1997 { 1998 bfd_vma disp; 1999 unsigned char *insn = &contents[irel->r_offset]; 2000 disp = *insn; 2001 /* This is a JMP.S, which we have to manually update. */ 2002 if (elf32_m32c_machine (abfd) == bfd_mach_m16c) 2003 { 2004 if ((*insn & 0xf8) != 0x60) 2005 continue; 2006 disp = (disp & 7); 2007 } 2008 else 2009 { 2010 if ((*insn & 0xce) != 0x4a) 2011 continue; 2012 disp = ((disp & 0x30) >> 3) | (disp & 1); 2013 } 2014 if (irel->r_offset + disp + 2 >= addr+count) 2015 { 2016 disp -= count; 2017 if (elf32_m32c_machine (abfd) == bfd_mach_m16c) 2018 { 2019 *insn = (*insn & 0xf8) | disp; 2020 } 2021 else 2022 { 2023 *insn = (*insn & 0xce) | ((disp & 6) << 3) | (disp & 1); 2024 } 2025 } 2026 } 2027 } 2028 2029 /* Adjust the local symbols defined in this section. */ 2030 symtab_hdr = & elf_tdata (abfd)->symtab_hdr; 2031 intsyms = (Elf_Internal_Sym *) symtab_hdr->contents; 2032 isym = intsyms; 2033 isymend = isym + symtab_hdr->sh_info; 2034 2035 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); 2036 if (elf_symtab_shndx_list (abfd)) 2037 { 2038 shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr; 2039 shndx_buf = (Elf_External_Sym_Shndx *) shndx_hdr->contents; 2040 } 2041 else 2042 { 2043 shndx_hdr = NULL; 2044 shndx_buf = NULL; 2045 } 2046 shndx = shndx_buf; 2047 2048 for (; isym < isymend; isym++, shndx = (shndx ? shndx + 1 : NULL)) 2049 { 2050 /* If the symbol is in the range of memory we just moved, we 2051 have to adjust its value. */ 2052 if ((int) isym->st_shndx == sec_shndx 2053 && isym->st_value > addr 2054 && isym->st_value < toaddr) 2055 { 2056 isym->st_value -= count; 2057 } 2058 /* If the symbol *spans* the bytes we just deleted (i.e. it's 2059 *end* is in the moved bytes but it's *start* isn't), then we 2060 must adjust its size. */ 2061 if ((int) isym->st_shndx == sec_shndx 2062 && isym->st_value < addr 2063 && isym->st_value + isym->st_size > addr 2064 && isym->st_value + isym->st_size < toaddr) 2065 { 2066 isym->st_size -= count; 2067 } 2068 } 2069 2070 /* Now adjust the global symbols defined in this section. */ 2071 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) 2072 - symtab_hdr->sh_info); 2073 sym_hashes = elf_sym_hashes (abfd); 2074 end_hashes = sym_hashes + symcount; 2075 2076 for (; sym_hashes < end_hashes; sym_hashes ++) 2077 { 2078 struct elf_link_hash_entry * sym_hash = * sym_hashes; 2079 2080 if (sym_hash && 2081 (sym_hash->root.type == bfd_link_hash_defined 2082 || sym_hash->root.type == bfd_link_hash_defweak) 2083 && sym_hash->root.u.def.section == sec) 2084 { 2085 if (sym_hash->root.u.def.value > addr 2086 && sym_hash->root.u.def.value < toaddr) 2087 { 2088 sym_hash->root.u.def.value -= count; 2089 } 2090 if (sym_hash->root.u.def.value < addr 2091 && sym_hash->root.u.def.value + sym_hash->size > addr 2092 && sym_hash->root.u.def.value + sym_hash->size < toaddr) 2093 { 2094 sym_hash->size -= count; 2095 } 2096 } 2097 } 2098 2099 return true; 2100 } 2101 2102 /* This is for versions of gcc prior to 4.3. */ 2103 static unsigned int 2104 _bfd_m32c_elf_eh_frame_address_size (bfd *abfd, 2105 const asection *sec ATTRIBUTE_UNUSED) 2106 { 2107 if ((elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK) == EF_M32C_CPU_M16C) 2108 return 2; 2109 return 4; 2110 } 2111 2112 2113 2114 #define ELF_ARCH bfd_arch_m32c 2115 #define ELF_MACHINE_CODE EM_M32C 2116 #define ELF_MACHINE_ALT1 EM_M32C_OLD 2117 #define ELF_MAXPAGESIZE 0x100 2118 2119 #if 0 2120 #define TARGET_BIG_SYM m32c_elf32_vec 2121 #define TARGET_BIG_NAME "elf32-m32c" 2122 #else 2123 #define TARGET_LITTLE_SYM m32c_elf32_vec 2124 #define TARGET_LITTLE_NAME "elf32-m32c" 2125 #endif 2126 2127 #define elf_info_to_howto_rel NULL 2128 #define elf_info_to_howto m32c_info_to_howto_rela 2129 #define elf_backend_object_p m32c_elf_object_p 2130 #define elf_backend_relocate_section m32c_elf_relocate_section 2131 #define elf_backend_check_relocs m32c_elf_check_relocs 2132 #define elf_backend_object_p m32c_elf_object_p 2133 #define elf_symbol_leading_char ('_') 2134 #define elf_backend_always_size_sections \ 2135 m32c_elf_always_size_sections 2136 #define elf_backend_finish_dynamic_sections \ 2137 m32c_elf_finish_dynamic_sections 2138 2139 #define elf_backend_can_gc_sections 1 2140 #define elf_backend_eh_frame_address_size _bfd_m32c_elf_eh_frame_address_size 2141 2142 #define bfd_elf32_bfd_reloc_type_lookup m32c_reloc_type_lookup 2143 #define bfd_elf32_bfd_reloc_name_lookup m32c_reloc_name_lookup 2144 #define bfd_elf32_bfd_relax_section m32c_elf_relax_section 2145 #define bfd_elf32_bfd_set_private_flags m32c_elf_set_private_flags 2146 #define bfd_elf32_bfd_merge_private_bfd_data m32c_elf_merge_private_bfd_data 2147 #define bfd_elf32_bfd_print_private_bfd_data m32c_elf_print_private_bfd_data 2148 2149 #include "elf32-target.h" 2150