1 /* M16C/M32C specific support for 32-bit ELF. 2 Copyright (C) 2005-2018 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 void m32c_info_to_howto_rela 32 (bfd *, arelent *, Elf_Internal_Rela *); 33 static bfd_boolean m32c_elf_relocate_section 34 (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); 35 static bfd_boolean m32c_elf_check_relocs 36 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); 37 static bfd_boolean 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 bfd_boolean m32c_elf_relax_section 43 (bfd *abfd, asection *sec, struct bfd_link_info *link_info, bfd_boolean *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 3, /* size (0 = byte, 1 = short, 2 = long) */ 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 1, /* size (0 = byte, 1 = short, 2 = long) */ 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 2, /* size (0 = byte, 1 = short, 2 = long) */ 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 2, /* size (0 = byte, 1 = short, 2 = long) */ 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 0, /* size (0 = byte, 1 = short, 2 = long) */ 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 1, /* size (0 = byte, 1 = short, 2 = long) */ 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 0, /* size (0 = byte, 1 = short, 2 = long) */ 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 1, /* size (0 = byte, 1 = short, 2 = long) */ 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 0, /* size (0 = byte, 1 = short, 2 = long) */ 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 1, /* size (0 = byte, 1 = short, 2 = long) */ 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 (0 = byte, 1 = short, 2 = long) */ 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 (0 = byte, 1 = short, 2 = long) */ 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 (0 = byte, 1 = short, 2 = long) */ 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 void 295 m32c_info_to_howto_rela 296 (bfd * abfd ATTRIBUTE_UNUSED, 297 arelent * cache_ptr, 298 Elf_Internal_Rela * dst) 299 { 300 unsigned int r_type; 301 302 r_type = ELF32_R_TYPE (dst->r_info); 303 if (r_type >= (unsigned int) R_M32C_max) 304 { 305 /* xgettext:c-format */ 306 _bfd_error_handler (_("%B: invalid M32C reloc number: %d"), abfd, r_type); 307 r_type = 0; 308 } 309 cache_ptr->howto = & m32c_elf_howto_table [r_type]; 310 } 311 312 313 314 /* Apply R_M32C_24 relocations. We have to do this because it's not a 315 power-of-two size, and the generic code may think it overruns the 316 section if it's right at the end. 317 318 Must return something other than bfd_reloc_continue to avoid the 319 above problem. Typical return values include bfd_reloc_ok or 320 bfd_reloc_overflow. 321 */ 322 323 static bfd_reloc_status_type m32c_apply_reloc_24 (bfd *abfd ATTRIBUTE_UNUSED, 324 arelent *reloc_entry, 325 asymbol *symbol, 326 void *vdata_start ATTRIBUTE_UNUSED, 327 asection *input_section, 328 bfd *ibfd ATTRIBUTE_UNUSED, 329 char **error_msg ATTRIBUTE_UNUSED) 330 { 331 bfd_vma relocation; 332 bfd_reloc_status_type s; 333 334 s = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, 335 vdata_start, 336 input_section, ibfd, error_msg); 337 if (s != bfd_reloc_continue) 338 return s; 339 340 /* Get symbol value. (Common symbols are special.) */ 341 if (bfd_is_com_section (symbol->section)) 342 relocation = 0; 343 else 344 relocation = symbol->value; 345 346 relocation += symbol->section->output_offset; 347 348 /* Add in supplied addend. */ 349 relocation += reloc_entry->addend; 350 351 reloc_entry->addend = relocation; 352 reloc_entry->address += input_section->output_offset; 353 return bfd_reloc_ok; 354 } 355 356 /* Relocate an M32C ELF section. 357 There is some attempt to make this function usable for many architectures, 358 both USE_REL and USE_RELA ['twould be nice if such a critter existed], 359 if only to serve as a learning tool. 360 361 The RELOCATE_SECTION function is called by the new ELF backend linker 362 to handle the relocations for a section. 363 364 The relocs are always passed as Rela structures; if the section 365 actually uses Rel structures, the r_addend field will always be 366 zero. 367 368 This function is responsible for adjusting the section contents as 369 necessary, and (if using Rela relocs and generating a relocatable 370 output file) adjusting the reloc addend as necessary. 371 372 This function does not have to worry about setting the reloc 373 address or the reloc symbol index. 374 375 LOCAL_SYMS is a pointer to the swapped in local symbols. 376 377 LOCAL_SECTIONS is an array giving the section in the input file 378 corresponding to the st_shndx field of each local symbol. 379 380 The global hash table entry for the global symbols can be found 381 via elf_sym_hashes (input_bfd). 382 383 When generating relocatable output, this function must handle 384 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 385 going to be the section symbol corresponding to the output 386 section, which means that the addend must be adjusted 387 accordingly. */ 388 389 static bfd_boolean 390 m32c_elf_relocate_section 391 (bfd * output_bfd ATTRIBUTE_UNUSED, 392 struct bfd_link_info * info, 393 bfd * input_bfd, 394 asection * input_section, 395 bfd_byte * contents, 396 Elf_Internal_Rela * relocs, 397 Elf_Internal_Sym * local_syms, 398 asection ** local_sections) 399 { 400 Elf_Internal_Shdr * symtab_hdr; 401 struct elf_link_hash_entry ** sym_hashes; 402 Elf_Internal_Rela * rel; 403 Elf_Internal_Rela * relend; 404 asection *splt; 405 406 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; 407 sym_hashes = elf_sym_hashes (input_bfd); 408 relend = relocs + input_section->reloc_count; 409 410 splt = elf_hash_table (info)->splt; 411 412 for (rel = relocs; rel < relend; rel ++) 413 { 414 reloc_howto_type * howto; 415 unsigned long r_symndx; 416 Elf_Internal_Sym * sym; 417 asection * sec; 418 struct elf_link_hash_entry * h; 419 bfd_vma relocation; 420 bfd_reloc_status_type r; 421 const char * name = NULL; 422 int r_type; 423 424 r_type = ELF32_R_TYPE (rel->r_info); 425 426 /* These are only used for relaxing; we don't actually relocate 427 anything with them, so skip them. */ 428 if (r_type == R_M32C_RL_JUMP 429 || r_type == R_M32C_RL_1ADDR 430 || r_type == R_M32C_RL_2ADDR) 431 continue; 432 433 r_symndx = ELF32_R_SYM (rel->r_info); 434 435 howto = m32c_elf_howto_table + ELF32_R_TYPE (rel->r_info); 436 h = NULL; 437 sym = NULL; 438 sec = NULL; 439 relocation = 0; 440 441 if (r_symndx < symtab_hdr->sh_info) 442 { 443 sym = local_syms + r_symndx; 444 sec = local_sections [r_symndx]; 445 relocation = (sec->output_section->vma 446 + sec->output_offset 447 + sym->st_value); 448 449 name = bfd_elf_string_from_elf_section 450 (input_bfd, symtab_hdr->sh_link, sym->st_name); 451 name = (sym->st_name == 0) ? bfd_section_name (input_bfd, sec) : name; 452 } 453 else 454 { 455 h = sym_hashes [r_symndx - symtab_hdr->sh_info]; 456 457 if (info->wrap_hash != NULL 458 && (input_section->flags & SEC_DEBUGGING) != 0) 459 h = ((struct elf_link_hash_entry *) 460 unwrap_hash_lookup (info, input_bfd, &h->root)); 461 462 while (h->root.type == bfd_link_hash_indirect 463 || h->root.type == bfd_link_hash_warning) 464 h = (struct elf_link_hash_entry *) h->root.u.i.link; 465 466 name = h->root.root.string; 467 468 if (h->root.type == bfd_link_hash_defined 469 || h->root.type == bfd_link_hash_defweak) 470 { 471 sec = h->root.u.def.section; 472 relocation = (h->root.u.def.value 473 + sec->output_section->vma 474 + sec->output_offset); 475 } 476 else if (h->root.type == bfd_link_hash_undefweak) 477 ; 478 else if (!bfd_link_relocatable (info)) 479 (*info->callbacks->undefined_symbol) (info, h->root.root.string, 480 input_bfd, input_section, 481 rel->r_offset, TRUE); 482 } 483 484 if (sec != NULL && discarded_section (sec)) 485 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 486 rel, 1, relend, howto, 0, contents); 487 488 if (bfd_link_relocatable (info)) 489 { 490 /* This is a relocatable link. We don't have to change 491 anything, unless the reloc is against a section symbol, 492 in which case we have to adjust according to where the 493 section symbol winds up in the output section. */ 494 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) 495 rel->r_addend += sec->output_offset; 496 continue; 497 } 498 499 switch (ELF32_R_TYPE (rel->r_info)) 500 { 501 case R_M32C_16: 502 { 503 bfd_vma *plt_offset; 504 505 if (h != NULL) 506 plt_offset = &h->plt.offset; 507 else 508 plt_offset = elf_local_got_offsets (input_bfd) + r_symndx; 509 510 /* printf("%s: rel %x plt %d\n", h ? h->root.root.string : "(none)", 511 relocation, *plt_offset);*/ 512 if (relocation <= 0xffff) 513 { 514 /* If the symbol is in range for a 16-bit address, we should 515 have deallocated the plt entry in relax_section. */ 516 BFD_ASSERT (*plt_offset == (bfd_vma) -1); 517 } 518 else 519 { 520 /* If the symbol is out of range for a 16-bit address, 521 we must have allocated a plt entry. */ 522 BFD_ASSERT (*plt_offset != (bfd_vma) -1); 523 524 /* If this is the first time we've processed this symbol, 525 fill in the plt entry with the correct symbol address. */ 526 if ((*plt_offset & 1) == 0) 527 { 528 unsigned int x; 529 530 x = 0x000000fc; /* jmpf */ 531 x |= (relocation << 8) & 0xffffff00; 532 bfd_put_32 (input_bfd, x, splt->contents + *plt_offset); 533 *plt_offset |= 1; 534 } 535 536 relocation = (splt->output_section->vma 537 + splt->output_offset 538 + (*plt_offset & -2)); 539 if (name) 540 { 541 char *newname = bfd_malloc (strlen(name)+5); 542 strcpy (newname, name); 543 strcat(newname, ".plt"); 544 _bfd_generic_link_add_one_symbol (info, 545 input_bfd, 546 newname, 547 BSF_FUNCTION | BSF_WEAK, 548 splt, 549 (*plt_offset & -2), 550 0, 551 1, 552 0, 553 0); 554 } 555 } 556 } 557 break; 558 559 case R_M32C_HI8: 560 case R_M32C_HI16: 561 relocation >>= 16; 562 break; 563 } 564 565 #if 0 566 printf ("relocate %s at %06lx relocation %06lx addend %ld ", 567 m32c_elf_howto_table[ELF32_R_TYPE(rel->r_info)].name, 568 rel->r_offset + input_section->output_section->vma + input_section->output_offset, 569 relocation, rel->r_addend); 570 { 571 int i; 572 for (i=0; i<4; i++) 573 printf (" %02x", contents[rel->r_offset+i]); 574 printf ("\n"); 575 } 576 #endif 577 switch (ELF32_R_TYPE(rel->r_info)) 578 { 579 case R_M32C_24: 580 /* Like m32c_apply_reloc_24, we must handle this one separately. */ 581 relocation += rel->r_addend; 582 583 /* Sanity check the address. */ 584 if (rel->r_offset + 3 585 > bfd_get_section_limit_octets (input_bfd, input_section)) 586 r = bfd_reloc_outofrange; 587 else 588 { 589 bfd_put_8 (input_bfd, relocation & 0xff, contents + rel->r_offset); 590 bfd_put_8 (input_bfd, (relocation >> 8) & 0xff, contents + rel->r_offset + 1); 591 bfd_put_8 (input_bfd, (relocation >> 16) & 0xff, contents + rel->r_offset + 2); 592 r = bfd_reloc_ok; 593 } 594 595 break; 596 597 default: 598 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 599 contents, rel->r_offset, relocation, 600 rel->r_addend); 601 break; 602 } 603 604 if (r != bfd_reloc_ok) 605 { 606 const char * msg = (const char *) NULL; 607 608 switch (r) 609 { 610 case bfd_reloc_overflow: 611 (*info->callbacks->reloc_overflow) 612 (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0, 613 input_bfd, input_section, rel->r_offset); 614 break; 615 616 case bfd_reloc_undefined: 617 (*info->callbacks->undefined_symbol) 618 (info, name, input_bfd, input_section, rel->r_offset, TRUE); 619 break; 620 621 case bfd_reloc_outofrange: 622 msg = _("internal error: out of range error"); 623 break; 624 625 case bfd_reloc_notsupported: 626 msg = _("internal error: unsupported relocation error"); 627 break; 628 629 case bfd_reloc_dangerous: 630 msg = _("internal error: dangerous relocation"); 631 break; 632 633 default: 634 msg = _("internal error: unknown error"); 635 break; 636 } 637 638 if (msg) 639 (*info->callbacks->warning) (info, msg, name, input_bfd, 640 input_section, rel->r_offset); 641 } 642 } 643 644 return TRUE; 645 } 646 647 /* We support 16-bit pointers to code above 64k by generating a thunk 648 below 64k containing a JMP instruction to the final address. */ 649 650 static bfd_boolean 651 m32c_elf_check_relocs 652 (bfd * abfd, 653 struct bfd_link_info * info, 654 asection * sec, 655 const Elf_Internal_Rela * relocs) 656 { 657 Elf_Internal_Shdr * symtab_hdr; 658 struct elf_link_hash_entry ** sym_hashes; 659 const Elf_Internal_Rela * rel; 660 const Elf_Internal_Rela * rel_end; 661 bfd_vma *local_plt_offsets; 662 asection *splt; 663 bfd *dynobj; 664 665 if (bfd_link_relocatable (info)) 666 return TRUE; 667 668 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 669 sym_hashes = elf_sym_hashes (abfd); 670 local_plt_offsets = elf_local_got_offsets (abfd); 671 splt = NULL; 672 dynobj = elf_hash_table(info)->dynobj; 673 674 rel_end = relocs + sec->reloc_count; 675 for (rel = relocs; rel < rel_end; rel++) 676 { 677 struct elf_link_hash_entry *h; 678 unsigned long r_symndx; 679 bfd_vma *offset; 680 681 r_symndx = ELF32_R_SYM (rel->r_info); 682 if (r_symndx < symtab_hdr->sh_info) 683 h = NULL; 684 else 685 { 686 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 687 while (h->root.type == bfd_link_hash_indirect 688 || h->root.type == bfd_link_hash_warning) 689 h = (struct elf_link_hash_entry *) h->root.u.i.link; 690 } 691 692 switch (ELF32_R_TYPE (rel->r_info)) 693 { 694 /* This relocation describes a 16-bit pointer to a function. 695 We may need to allocate a thunk in low memory; reserve memory 696 for it now. */ 697 case R_M32C_16: 698 if (dynobj == NULL) 699 elf_hash_table (info)->dynobj = dynobj = abfd; 700 splt = elf_hash_table (info)->splt; 701 if (splt == NULL) 702 { 703 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 704 | SEC_IN_MEMORY | SEC_LINKER_CREATED 705 | SEC_READONLY | SEC_CODE); 706 splt = bfd_make_section_anyway_with_flags (dynobj, ".plt", 707 flags); 708 elf_hash_table (info)->splt = splt; 709 if (splt == NULL 710 || ! bfd_set_section_alignment (dynobj, splt, 1)) 711 return FALSE; 712 } 713 714 if (h != NULL) 715 offset = &h->plt.offset; 716 else 717 { 718 if (local_plt_offsets == NULL) 719 { 720 size_t size; 721 unsigned int i; 722 723 size = symtab_hdr->sh_info * sizeof (bfd_vma); 724 local_plt_offsets = (bfd_vma *) bfd_alloc (abfd, size); 725 if (local_plt_offsets == NULL) 726 return FALSE; 727 elf_local_got_offsets (abfd) = local_plt_offsets; 728 729 for (i = 0; i < symtab_hdr->sh_info; i++) 730 local_plt_offsets[i] = (bfd_vma) -1; 731 } 732 offset = &local_plt_offsets[r_symndx]; 733 } 734 735 if (*offset == (bfd_vma) -1) 736 { 737 *offset = splt->size; 738 splt->size += 4; 739 } 740 break; 741 } 742 } 743 744 return TRUE; 745 } 746 747 /* This must exist if dynobj is ever set. */ 748 749 static bfd_boolean 750 m32c_elf_finish_dynamic_sections (bfd *abfd ATTRIBUTE_UNUSED, 751 struct bfd_link_info *info) 752 { 753 bfd *dynobj = elf_hash_table (info)->dynobj; 754 asection *splt = elf_hash_table (info)->splt; 755 756 /* As an extra sanity check, verify that all plt entries have 757 been filled in. */ 758 759 if (dynobj != NULL && splt != NULL) 760 { 761 bfd_byte *contents = splt->contents; 762 unsigned int i, size = splt->size; 763 for (i = 0; i < size; i += 4) 764 { 765 unsigned int x = bfd_get_32 (dynobj, contents + i); 766 BFD_ASSERT (x != 0); 767 } 768 } 769 770 return TRUE; 771 } 772 773 static bfd_boolean 774 m32c_elf_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 775 struct bfd_link_info *info) 776 { 777 bfd *dynobj; 778 asection *splt; 779 780 if (bfd_link_relocatable (info)) 781 return TRUE; 782 783 dynobj = elf_hash_table (info)->dynobj; 784 if (dynobj == NULL) 785 return TRUE; 786 787 splt = elf_hash_table (info)->splt; 788 BFD_ASSERT (splt != NULL); 789 790 splt->contents = (bfd_byte *) bfd_zalloc (dynobj, splt->size); 791 if (splt->contents == NULL) 792 return FALSE; 793 794 return TRUE; 795 } 796 797 /* Function to set the ELF flag bits. */ 798 799 static bfd_boolean 800 m32c_elf_set_private_flags (bfd *abfd, flagword flags) 801 { 802 elf_elfheader (abfd)->e_flags = flags; 803 elf_flags_init (abfd) = TRUE; 804 return TRUE; 805 } 806 807 /* Merge backend specific data from an object file to the output 808 object file when linking. */ 809 810 static bfd_boolean 811 m32c_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 812 { 813 bfd *obfd = info->output_bfd; 814 flagword old_flags, old_partial; 815 flagword new_flags, new_partial; 816 bfd_boolean error = FALSE; 817 char new_opt[80]; 818 char old_opt[80]; 819 820 new_opt[0] = old_opt[0] = '\0'; 821 new_flags = elf_elfheader (ibfd)->e_flags; 822 old_flags = elf_elfheader (obfd)->e_flags; 823 824 #ifdef DEBUG 825 _bfd_error_handler 826 ("old_flags = 0x%.8x, new_flags = 0x%.8x, init = %s, filename = %s", 827 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no", 828 bfd_get_filename (ibfd)); 829 #endif 830 831 if (!elf_flags_init (obfd)) 832 { 833 /* First call, no flags set. */ 834 elf_flags_init (obfd) = TRUE; 835 elf_elfheader (obfd)->e_flags = new_flags; 836 } 837 838 else if (new_flags == old_flags) 839 /* Compatible flags are ok. */ 840 ; 841 842 else /* Possibly incompatible flags. */ 843 { 844 /* Warn if different cpu is used (allow a specific cpu to override 845 the generic cpu). */ 846 new_partial = (new_flags & EF_M32C_CPU_MASK); 847 old_partial = (old_flags & EF_M32C_CPU_MASK); 848 if (new_partial == old_partial) 849 ; 850 851 else 852 { 853 switch (new_partial) 854 { 855 default: strcat (new_opt, " -m16c"); break; 856 case EF_M32C_CPU_M16C: strcat (new_opt, " -m16c"); break; 857 case EF_M32C_CPU_M32C: strcat (new_opt, " -m32c"); break; 858 } 859 860 switch (old_partial) 861 { 862 default: strcat (old_opt, " -m16c"); break; 863 case EF_M32C_CPU_M16C: strcat (old_opt, " -m16c"); break; 864 case EF_M32C_CPU_M32C: strcat (old_opt, " -m32c"); break; 865 } 866 } 867 868 /* Print out any mismatches from above. */ 869 if (new_opt[0]) 870 { 871 error = TRUE; 872 _bfd_error_handler 873 /* xgettext:c-format */ 874 (_("%B: compiled with %s and linked with modules compiled with %s"), 875 ibfd, new_opt, old_opt); 876 } 877 878 new_flags &= ~ EF_M32C_ALL_FLAGS; 879 old_flags &= ~ EF_M32C_ALL_FLAGS; 880 881 /* Warn about any other mismatches. */ 882 if (new_flags != old_flags) 883 { 884 error = TRUE; 885 _bfd_error_handler 886 /* xgettext:c-format */ 887 (_("%B: uses different e_flags (%#x) fields" 888 " than previous modules (%#x)"), 889 ibfd, new_flags, old_flags); 890 } 891 } 892 893 if (error) 894 bfd_set_error (bfd_error_bad_value); 895 896 return !error; 897 } 898 899 900 static bfd_boolean 901 m32c_elf_print_private_bfd_data (bfd *abfd, void *ptr) 902 { 903 FILE *file = (FILE *) ptr; 904 flagword flags; 905 906 BFD_ASSERT (abfd != NULL && ptr != NULL); 907 908 /* Print normal ELF private data. */ 909 _bfd_elf_print_private_bfd_data (abfd, ptr); 910 911 flags = elf_elfheader (abfd)->e_flags; 912 fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags); 913 914 switch (flags & EF_M32C_CPU_MASK) 915 { 916 default: break; 917 case EF_M32C_CPU_M16C: fprintf (file, " -m16c"); break; 918 case EF_M32C_CPU_M32C: fprintf (file, " -m32c"); break; 919 } 920 921 fputc ('\n', file); 922 return TRUE; 923 } 924 925 /* Return the MACH for an e_flags value. */ 926 927 static int 928 elf32_m32c_machine (bfd *abfd) 929 { 930 switch (elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK) 931 { 932 case EF_M32C_CPU_M16C: return bfd_mach_m16c; 933 case EF_M32C_CPU_M32C: return bfd_mach_m32c; 934 } 935 936 return bfd_mach_m16c; 937 } 938 939 static bfd_boolean 940 m32c_elf_object_p (bfd *abfd) 941 { 942 bfd_default_set_arch_mach (abfd, bfd_arch_m32c, 943 elf32_m32c_machine (abfd)); 944 return TRUE; 945 } 946 947 948 #ifdef DEBUG 949 void 950 dump_symtab (bfd * abfd, void *internal_syms, void *external_syms) 951 { 952 size_t locsymcount; 953 Elf_Internal_Sym *isymbuf; 954 Elf_Internal_Sym *isymend; 955 Elf_Internal_Sym *isym; 956 Elf_Internal_Shdr *symtab_hdr; 957 bfd_boolean free_internal = 0, free_external = 0; 958 char * st_info_str; 959 char * st_info_stb_str; 960 char * st_other_str; 961 char * st_shndx_str; 962 963 if (! internal_syms) 964 { 965 internal_syms = bfd_malloc (1000); 966 free_internal = 1; 967 } 968 if (! external_syms) 969 { 970 external_syms = bfd_malloc (1000); 971 free_external = 1; 972 } 973 974 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 975 locsymcount = symtab_hdr->sh_size / get_elf_backend_data(abfd)->s->sizeof_sym; 976 if (free_internal) 977 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 978 symtab_hdr->sh_info, 0, 979 internal_syms, external_syms, NULL); 980 else 981 isymbuf = internal_syms; 982 isymend = isymbuf + locsymcount; 983 984 for (isym = isymbuf ; isym < isymend ; isym++) 985 { 986 switch (ELF_ST_TYPE (isym->st_info)) 987 { 988 case STT_FUNC: 989 st_info_str = "STT_FUNC"; 990 break; 991 992 case STT_SECTION: 993 st_info_str = "STT_SECTION"; 994 break; 995 996 case STT_FILE: 997 st_info_str = "STT_FILE"; 998 break; 999 1000 case STT_OBJECT: 1001 st_info_str = "STT_OBJECT"; 1002 break; 1003 1004 case STT_TLS: 1005 st_info_str = "STT_TLS"; 1006 break; 1007 1008 default: 1009 st_info_str = ""; 1010 } 1011 1012 switch (ELF_ST_BIND (isym->st_info)) 1013 { 1014 case STB_LOCAL: 1015 st_info_stb_str = "STB_LOCAL"; 1016 break; 1017 1018 case STB_GLOBAL: 1019 st_info_stb_str = "STB_GLOBAL"; 1020 break; 1021 1022 default: 1023 st_info_stb_str = ""; 1024 } 1025 1026 switch (ELF_ST_VISIBILITY (isym->st_other)) 1027 { 1028 case STV_DEFAULT: 1029 st_other_str = "STV_DEFAULT"; 1030 break; 1031 1032 case STV_INTERNAL: 1033 st_other_str = "STV_INTERNAL"; 1034 break; 1035 1036 case STV_PROTECTED: 1037 st_other_str = "STV_PROTECTED"; 1038 break; 1039 1040 default: 1041 st_other_str = ""; 1042 } 1043 1044 switch (isym->st_shndx) 1045 { 1046 case SHN_ABS: 1047 st_shndx_str = "SHN_ABS"; 1048 break; 1049 1050 case SHN_COMMON: 1051 st_shndx_str = "SHN_COMMON"; 1052 break; 1053 1054 case SHN_UNDEF: 1055 st_shndx_str = "SHN_UNDEF"; 1056 break; 1057 1058 default: 1059 st_shndx_str = ""; 1060 } 1061 1062 printf ("isym = %p st_value = %lx st_size = %lx st_name = (%lu) %s " 1063 "st_info = (%d) %s %s st_other = (%d) %s st_shndx = (%d) %s\n", 1064 isym, 1065 (unsigned long) isym->st_value, 1066 (unsigned long) isym->st_size, 1067 isym->st_name, 1068 bfd_elf_string_from_elf_section (abfd, symtab_hdr->sh_link, 1069 isym->st_name), 1070 isym->st_info, st_info_str, st_info_stb_str, 1071 isym->st_other, st_other_str, 1072 isym->st_shndx, st_shndx_str); 1073 } 1074 if (free_internal) 1075 free (internal_syms); 1076 if (free_external) 1077 free (external_syms); 1078 } 1079 1080 char * 1081 m32c_get_reloc (long reloc) 1082 { 1083 if (0 <= reloc && reloc < R_M32C_max) 1084 return m32c_elf_howto_table[reloc].name; 1085 else 1086 return ""; 1087 } 1088 #endif /* DEBUG */ 1089 1090 /* Handle relaxing. */ 1091 1092 /* A subroutine of m32c_elf_relax_section. If the global symbol H 1093 is within the low 64k, remove any entry for it in the plt. */ 1094 1095 struct relax_plt_data 1096 { 1097 asection *splt; 1098 bfd_boolean *again; 1099 }; 1100 1101 static bfd_boolean 1102 m32c_relax_plt_check (struct elf_link_hash_entry *h, void * xdata) 1103 { 1104 struct relax_plt_data *data = (struct relax_plt_data *) xdata; 1105 1106 if (h->plt.offset != (bfd_vma) -1) 1107 { 1108 bfd_vma address; 1109 1110 if (h->root.type == bfd_link_hash_undefined 1111 || h->root.type == bfd_link_hash_undefweak) 1112 address = 0; 1113 else 1114 address = (h->root.u.def.section->output_section->vma 1115 + h->root.u.def.section->output_offset 1116 + h->root.u.def.value); 1117 1118 if (address <= 0xffff) 1119 { 1120 h->plt.offset = -1; 1121 data->splt->size -= 4; 1122 *data->again = TRUE; 1123 } 1124 } 1125 1126 return TRUE; 1127 } 1128 1129 /* A subroutine of m32c_elf_relax_section. If the global symbol H 1130 previously had a plt entry, give it a new entry offset. */ 1131 1132 static bfd_boolean 1133 m32c_relax_plt_realloc (struct elf_link_hash_entry *h, void * xdata) 1134 { 1135 bfd_vma *entry = (bfd_vma *) xdata; 1136 1137 if (h->plt.offset != (bfd_vma) -1) 1138 { 1139 h->plt.offset = *entry; 1140 *entry += 4; 1141 } 1142 1143 return TRUE; 1144 } 1145 1146 static bfd_boolean 1147 m32c_elf_relax_plt_section (asection *splt, 1148 struct bfd_link_info *info, 1149 bfd_boolean *again) 1150 { 1151 struct relax_plt_data relax_plt_data; 1152 bfd *ibfd; 1153 1154 /* Assume nothing changes. */ 1155 *again = FALSE; 1156 1157 if (bfd_link_relocatable (info)) 1158 return TRUE; 1159 1160 /* Quick check for an empty plt. */ 1161 if (splt->size == 0) 1162 return TRUE; 1163 1164 /* Map across all global symbols; see which ones happen to 1165 fall in the low 64k. */ 1166 relax_plt_data.splt = splt; 1167 relax_plt_data.again = again; 1168 elf_link_hash_traverse (elf_hash_table (info), m32c_relax_plt_check, 1169 &relax_plt_data); 1170 1171 /* Likewise for local symbols, though that's somewhat less convenient 1172 as we have to walk the list of input bfds and swap in symbol data. */ 1173 for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link.next) 1174 { 1175 bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd); 1176 Elf_Internal_Shdr *symtab_hdr; 1177 Elf_Internal_Sym *isymbuf = NULL; 1178 unsigned int idx; 1179 1180 if (! local_plt_offsets) 1181 continue; 1182 1183 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 1184 if (symtab_hdr->sh_info != 0) 1185 { 1186 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 1187 if (isymbuf == NULL) 1188 isymbuf = bfd_elf_get_elf_syms (ibfd, symtab_hdr, 1189 symtab_hdr->sh_info, 0, 1190 NULL, NULL, NULL); 1191 if (isymbuf == NULL) 1192 return FALSE; 1193 } 1194 1195 for (idx = 0; idx < symtab_hdr->sh_info; ++idx) 1196 { 1197 Elf_Internal_Sym *isym; 1198 asection *tsec; 1199 bfd_vma address; 1200 1201 if (local_plt_offsets[idx] == (bfd_vma) -1) 1202 continue; 1203 1204 isym = &isymbuf[idx]; 1205 if (isym->st_shndx == SHN_UNDEF) 1206 continue; 1207 else if (isym->st_shndx == SHN_ABS) 1208 tsec = bfd_abs_section_ptr; 1209 else if (isym->st_shndx == SHN_COMMON) 1210 tsec = bfd_com_section_ptr; 1211 else 1212 tsec = bfd_section_from_elf_index (ibfd, isym->st_shndx); 1213 1214 address = (tsec->output_section->vma 1215 + tsec->output_offset 1216 + isym->st_value); 1217 if (address <= 0xffff) 1218 { 1219 local_plt_offsets[idx] = -1; 1220 splt->size -= 4; 1221 *again = TRUE; 1222 } 1223 } 1224 1225 if (isymbuf != NULL 1226 && symtab_hdr->contents != (unsigned char *) isymbuf) 1227 { 1228 if (! info->keep_memory) 1229 free (isymbuf); 1230 else 1231 { 1232 /* Cache the symbols for elf_link_input_bfd. */ 1233 symtab_hdr->contents = (unsigned char *) isymbuf; 1234 } 1235 } 1236 } 1237 1238 /* If we changed anything, walk the symbols again to reallocate 1239 .plt entry addresses. */ 1240 if (*again && splt->size > 0) 1241 { 1242 bfd_vma entry = 0; 1243 1244 elf_link_hash_traverse (elf_hash_table (info), 1245 m32c_relax_plt_realloc, &entry); 1246 1247 for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link.next) 1248 { 1249 bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd); 1250 unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info; 1251 unsigned int idx; 1252 1253 if (! local_plt_offsets) 1254 continue; 1255 1256 for (idx = 0; idx < nlocals; ++idx) 1257 if (local_plt_offsets[idx] != (bfd_vma) -1) 1258 { 1259 local_plt_offsets[idx] = entry; 1260 entry += 4; 1261 } 1262 } 1263 } 1264 1265 return TRUE; 1266 } 1267 1268 static int 1269 compare_reloc (const void *e1, const void *e2) 1270 { 1271 const Elf_Internal_Rela *i1 = (const Elf_Internal_Rela *) e1; 1272 const Elf_Internal_Rela *i2 = (const Elf_Internal_Rela *) e2; 1273 1274 if (i1->r_offset == i2->r_offset) 1275 return 0; 1276 else 1277 return i1->r_offset < i2->r_offset ? -1 : 1; 1278 } 1279 1280 #define OFFSET_FOR_RELOC(rel) m32c_offset_for_reloc (abfd, rel, symtab_hdr, shndx_buf, intsyms) 1281 static bfd_vma 1282 m32c_offset_for_reloc (bfd *abfd, 1283 Elf_Internal_Rela *rel, 1284 Elf_Internal_Shdr *symtab_hdr, 1285 Elf_External_Sym_Shndx *shndx_buf ATTRIBUTE_UNUSED, 1286 Elf_Internal_Sym *intsyms) 1287 { 1288 bfd_vma symval; 1289 1290 /* Get the value of the symbol referred to by the reloc. */ 1291 if (ELF32_R_SYM (rel->r_info) < symtab_hdr->sh_info) 1292 { 1293 /* A local symbol. */ 1294 Elf_Internal_Sym *isym; 1295 asection *ssec; 1296 1297 isym = intsyms + ELF32_R_SYM (rel->r_info); 1298 ssec = bfd_section_from_elf_index (abfd, isym->st_shndx); 1299 symval = isym->st_value; 1300 if (ssec) 1301 symval += ssec->output_section->vma 1302 + ssec->output_offset; 1303 } 1304 else 1305 { 1306 unsigned long indx; 1307 struct elf_link_hash_entry *h; 1308 1309 /* An external symbol. */ 1310 indx = ELF32_R_SYM (rel->r_info) - symtab_hdr->sh_info; 1311 h = elf_sym_hashes (abfd)[indx]; 1312 BFD_ASSERT (h != NULL); 1313 1314 if (h->root.type != bfd_link_hash_defined 1315 && h->root.type != bfd_link_hash_defweak) 1316 /* This appears to be a reference to an undefined 1317 symbol. Just ignore it--it will be caught by the 1318 regular reloc processing. */ 1319 return 0; 1320 1321 symval = (h->root.u.def.value 1322 + h->root.u.def.section->output_section->vma 1323 + h->root.u.def.section->output_offset); 1324 } 1325 return symval; 1326 } 1327 1328 static int bytes_saved = 0; 1329 1330 static int bytes_to_reloc[] = { 1331 R_M32C_NONE, 1332 R_M32C_8, 1333 R_M32C_16, 1334 R_M32C_24, 1335 R_M32C_32 1336 }; 1337 1338 /* What we use the bits in a relax reloc addend (R_M32C_RL_*) for. */ 1339 1340 /* Mask for the number of relocs associated with this insn. */ 1341 #define RLA_RELOCS 0x0000000f 1342 /* Number of bytes gas emitted (before gas's relaxing) */ 1343 #define RLA_NBYTES 0x00000ff0 1344 1345 /* If the displacement is within the given range and the new encoding 1346 differs from the old encoding (the index), then the insn can be 1347 relaxed to the new encoding. */ 1348 typedef struct { 1349 int bytes; 1350 unsigned int max_disp; 1351 unsigned char new_encoding; 1352 } EncodingTable; 1353 1354 static EncodingTable m16c_addr_encodings[] = { 1355 { 0, 0, 0 }, /* R0 */ 1356 { 0, 0, 1 }, /* R1 */ 1357 { 0, 0, 2 }, /* R2 */ 1358 { 0, 0, 3 }, /* R3 */ 1359 { 0, 0, 4 }, /* A0 */ 1360 { 0, 0, 5 }, /* A1 */ 1361 { 0, 0, 6 }, /* [A0] */ 1362 { 0, 0, 7 }, /* [A1] */ 1363 { 1, 0, 6 }, /* udsp:8[A0] */ 1364 { 1, 0, 7 }, /* udsp:8[A1] */ 1365 { 1, 0, 10 }, /* udsp:8[SB] */ 1366 { 1, 0, 11 }, /* sdsp:8[FB] */ 1367 { 2, 255, 8 }, /* udsp:16[A0] */ 1368 { 2, 255, 9 }, /* udsp:16[A1] */ 1369 { 2, 255, 10 }, /* udsp:16[SB] */ 1370 { 2, 0, 15 }, /* abs:16 */ 1371 }; 1372 1373 static EncodingTable m16c_jmpaddr_encodings[] = { 1374 { 0, 0, 0 }, /* R0 */ 1375 { 0, 0, 1 }, /* R1 */ 1376 { 0, 0, 2 }, /* R2 */ 1377 { 0, 0, 3 }, /* R3 */ 1378 { 0, 0, 4 }, /* A0 */ 1379 { 0, 0, 5 }, /* A1 */ 1380 { 0, 0, 6 }, /* [A0] */ 1381 { 0, 0, 7 }, /* [A1] */ 1382 { 1, 0, 6 }, /* udsp:8[A0] */ 1383 { 1, 0, 7 }, /* udsp:8[A1] */ 1384 { 1, 0, 10 }, /* udsp:8[SB] */ 1385 { 1, 0, 11 }, /* sdsp:8[FB] */ 1386 { 3, 255, 8 }, /* udsp:20[A0] */ 1387 { 3, 255, 9 }, /* udsp:20[A1] */ 1388 { 2, 255, 10 }, /* udsp:16[SB] */ 1389 { 2, 0, 15 }, /* abs:16 */ 1390 }; 1391 1392 static EncodingTable m32c_addr_encodings[] = { 1393 { 0, 0, 0 }, /* [A0] */ 1394 { 0, 0, 1 }, /* [A1] */ 1395 { 0, 0, 2 }, /* A0 */ 1396 { 0, 0, 3 }, /* A1 */ 1397 { 1, 0, 0 }, /* udsp:8[A0] */ 1398 { 1, 0, 1 }, /* udsp:8[A1] */ 1399 { 1, 0, 6 }, /* udsp:8[SB] */ 1400 { 1, 0, 7 }, /* sdsp:8[FB] */ 1401 { 2, 255, 4 }, /* udsp:16[A0] */ 1402 { 2, 255, 5 }, /* udsp:16[A1] */ 1403 { 2, 255, 6 }, /* udsp:16[SB] */ 1404 { 2, 127, 7 }, /* sdsp:16[FB] */ 1405 { 3, 65535, 8 }, /* udsp:24[A0] */ 1406 { 3, 65535, 9 }, /* udsp:24[A1] */ 1407 { 3, 65535, 15 }, /* abs24 */ 1408 { 2, 0, 15 }, /* abs16 */ 1409 { 0, 0, 16 }, /* R2 */ 1410 { 0, 0, 17 }, /* R3 */ 1411 { 0, 0, 18 }, /* R0 */ 1412 { 0, 0, 19 }, /* R1 */ 1413 { 0, 0, 20 }, /* */ 1414 { 0, 0, 21 }, /* */ 1415 { 0, 0, 22 }, /* */ 1416 { 0, 0, 23 }, /* */ 1417 { 0, 0, 24 }, /* */ 1418 { 0, 0, 25 }, /* */ 1419 { 0, 0, 26 }, /* */ 1420 { 0, 0, 27 }, /* */ 1421 { 0, 0, 28 }, /* */ 1422 { 0, 0, 29 }, /* */ 1423 { 0, 0, 30 }, /* */ 1424 { 0, 0, 31 }, /* */ 1425 }; 1426 1427 static bfd_boolean 1428 m32c_elf_relax_section 1429 (bfd * abfd, 1430 asection * sec, 1431 struct bfd_link_info * link_info, 1432 bfd_boolean * again) 1433 { 1434 Elf_Internal_Shdr *symtab_hdr; 1435 Elf_Internal_Shdr *shndx_hdr; 1436 Elf_Internal_Rela *internal_relocs; 1437 Elf_Internal_Rela *free_relocs = NULL; 1438 Elf_Internal_Rela *irel, *irelend, *srel; 1439 bfd_byte * contents = NULL; 1440 bfd_byte * free_contents = NULL; 1441 Elf_Internal_Sym *intsyms = NULL; 1442 Elf_Internal_Sym *free_intsyms = NULL; 1443 Elf_External_Sym_Shndx *shndx_buf = NULL; 1444 int machine; 1445 1446 if (abfd == elf_hash_table (link_info)->dynobj 1447 && (sec->flags & SEC_LINKER_CREATED) != 0 1448 && strcmp (sec->name, ".plt") == 0) 1449 return m32c_elf_relax_plt_section (sec, link_info, again); 1450 1451 /* Assume nothing changes. */ 1452 *again = FALSE; 1453 1454 machine = elf32_m32c_machine (abfd); 1455 1456 /* We don't have to do anything for a relocatable link, if 1457 this section does not have relocs, or if this is not a 1458 code section. */ 1459 if (bfd_link_relocatable (link_info) 1460 || (sec->flags & SEC_RELOC) == 0 1461 || sec->reloc_count == 0 1462 || (sec->flags & SEC_CODE) == 0) 1463 return TRUE; 1464 1465 symtab_hdr = & elf_symtab_hdr (abfd); 1466 if (elf_symtab_shndx_list (abfd)) 1467 shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr; 1468 else 1469 shndx_hdr = NULL; 1470 1471 /* Get the section contents. */ 1472 if (elf_section_data (sec)->this_hdr.contents != NULL) 1473 contents = elf_section_data (sec)->this_hdr.contents; 1474 /* Go get them off disk. */ 1475 else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) 1476 goto error_return; 1477 1478 /* Read this BFD's symbols. */ 1479 /* Get cached copy if it exists. */ 1480 if (symtab_hdr->contents != NULL) 1481 { 1482 intsyms = (Elf_Internal_Sym *) symtab_hdr->contents; 1483 } 1484 else 1485 { 1486 intsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, symtab_hdr->sh_info, 0, NULL, NULL, NULL); 1487 symtab_hdr->contents = (bfd_byte *) intsyms; 1488 } 1489 1490 if (shndx_hdr && shndx_hdr->sh_size != 0) 1491 { 1492 bfd_size_type amt; 1493 1494 amt = symtab_hdr->sh_info; 1495 amt *= sizeof (Elf_External_Sym_Shndx); 1496 shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt); 1497 if (shndx_buf == NULL) 1498 goto error_return; 1499 if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0 1500 || bfd_bread (shndx_buf, amt, abfd) != amt) 1501 goto error_return; 1502 shndx_hdr->contents = (bfd_byte *) shndx_buf; 1503 } 1504 1505 /* Get a copy of the native relocations. */ 1506 internal_relocs = (_bfd_elf_link_read_relocs 1507 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, 1508 link_info->keep_memory)); 1509 if (internal_relocs == NULL) 1510 goto error_return; 1511 if (! link_info->keep_memory) 1512 free_relocs = internal_relocs; 1513 1514 /* The RL_ relocs must be just before the operand relocs they go 1515 with, so we must sort them to guarantee this. */ 1516 qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), 1517 compare_reloc); 1518 1519 /* Walk through them looking for relaxing opportunities. */ 1520 irelend = internal_relocs + sec->reloc_count; 1521 1522 for (irel = internal_relocs; irel < irelend; irel++) 1523 { 1524 bfd_vma symval; 1525 unsigned char *insn, *gap, *einsn; 1526 bfd_vma pc; 1527 bfd_signed_vma pcrel; 1528 int relax_relocs; 1529 int gap_size; 1530 int new_type; 1531 int posn; 1532 int enc; 1533 EncodingTable *enctbl; 1534 EncodingTable *e; 1535 1536 if (ELF32_R_TYPE(irel->r_info) != R_M32C_RL_JUMP 1537 && ELF32_R_TYPE(irel->r_info) != R_M32C_RL_1ADDR 1538 && ELF32_R_TYPE(irel->r_info) != R_M32C_RL_2ADDR) 1539 continue; 1540 1541 srel = irel; 1542 1543 /* There will always be room for the relaxed insn, since it is smaller 1544 than the one it would replace. */ 1545 BFD_ASSERT (irel->r_offset < sec->size); 1546 1547 insn = contents + irel->r_offset; 1548 relax_relocs = irel->r_addend % 16; 1549 1550 /* Ok, we only have three relocs we care about, and they're all 1551 fake. The lower four bits of the addend is always the number 1552 of following relocs (hence the qsort above) that are assigned 1553 to this opcode. The next 8 bits of the addend indicates the 1554 number of bytes in the insn. We use the rest of them 1555 ourselves as flags for the more expensive operations (defines 1556 above). The three relocs are: 1557 1558 RL_JUMP: This marks all direct jump insns. We check the 1559 displacement and replace them with shorter jumps if 1560 they're in range. We also use this to find JMP.S 1561 insns and manually shorten them when we delete bytes. 1562 We have to decode these insns to figure out what to 1563 do. 1564 1565 RL_1ADDR: This is a :G or :Q insn, which has a single 1566 "standard" operand. We have to extract the type 1567 field, see if it's a wide displacement, then figure 1568 out if we can replace it with a narrow displacement. 1569 We don't have to decode these insns. 1570 1571 RL_2ADDR: Similarly, but two "standard" operands. Note that 1572 r_addend may still be 1, as standard operands don't 1573 always have displacements. Gas shouldn't give us one 1574 with zero operands, but since we don't know which one 1575 has the displacement, we check them both anyway. 1576 1577 These all point to the beginning of the insn itself, not the 1578 operands. 1579 1580 Note that we only relax one step at a time, relying on the 1581 linker to call us repeatedly. Thus, there is no code for 1582 JMP.A->JMP.B although that will happen in two steps. 1583 Likewise, for 2ADDR relaxes, we do one operand per cycle. 1584 */ 1585 1586 /* Get the value of the symbol referred to by the reloc. Just 1587 in case this is the last reloc in the list, use the RL's 1588 addend to choose between this reloc (no addend) or the next 1589 (yes addend, which means at least one following reloc). */ 1590 srel = irel + (relax_relocs ? 1 : 0); 1591 symval = OFFSET_FOR_RELOC (srel); 1592 1593 /* Setting gap_size nonzero is the flag which means "something 1594 shrunk". */ 1595 gap_size = 0; 1596 gap = NULL; 1597 new_type = ELF32_R_TYPE(srel->r_info); 1598 1599 pc = sec->output_section->vma + sec->output_offset 1600 + srel->r_offset; 1601 pcrel = symval - pc + srel->r_addend; 1602 1603 if (machine == bfd_mach_m16c) 1604 { 1605 /* R8C / M16C */ 1606 1607 switch (ELF32_R_TYPE(irel->r_info)) 1608 { 1609 1610 case R_M32C_RL_JUMP: 1611 switch (insn[0]) 1612 { 1613 case 0xfe: /* jmp.b */ 1614 if (pcrel >= 2 && pcrel <= 9) 1615 { 1616 /* Relax JMP.B -> JMP.S. We need to get rid of 1617 the following reloc though. */ 1618 insn[0] = 0x60 | (pcrel - 2); 1619 new_type = R_M32C_NONE; 1620 irel->r_addend = 0x10; 1621 gap_size = 1; 1622 gap = insn + 1; 1623 } 1624 break; 1625 1626 case 0xf4: /* jmp.w */ 1627 /* 128 is allowed because it will be one byte closer 1628 after relaxing. Likewise for all other pc-rel 1629 jumps. */ 1630 if (pcrel <= 128 && pcrel >= -128) 1631 { 1632 /* Relax JMP.W -> JMP.B */ 1633 insn[0] = 0xfe; 1634 insn[1] = 0; 1635 new_type = R_M32C_8_PCREL; 1636 gap_size = 1; 1637 gap = insn + 2; 1638 } 1639 break; 1640 1641 case 0xfc: /* jmp.a */ 1642 if (pcrel <= 32768 && pcrel >= -32768) 1643 { 1644 /* Relax JMP.A -> JMP.W */ 1645 insn[0] = 0xf4; 1646 insn[1] = 0; 1647 insn[2] = 0; 1648 new_type = R_M32C_16_PCREL; 1649 gap_size = 1; 1650 gap = insn + 3; 1651 } 1652 break; 1653 1654 case 0xfd: /* jsr.a */ 1655 if (pcrel <= 32768 && pcrel >= -32768) 1656 { 1657 /* Relax JSR.A -> JSR.W */ 1658 insn[0] = 0xf5; 1659 insn[1] = 0; 1660 insn[2] = 0; 1661 new_type = R_M32C_16_PCREL; 1662 gap_size = 1; 1663 gap = insn + 3; 1664 } 1665 break; 1666 } 1667 break; 1668 1669 case R_M32C_RL_2ADDR: 1670 /* xxxx xxxx srce dest [src-disp] [dest-disp]*/ 1671 1672 enctbl = m16c_addr_encodings; 1673 posn = 2; 1674 enc = (insn[1] >> 4) & 0x0f; 1675 e = & enctbl[enc]; 1676 1677 if (srel->r_offset == irel->r_offset + posn 1678 && e->new_encoding != enc 1679 && symval <= e->max_disp) 1680 { 1681 insn[1] &= 0x0f; 1682 insn[1] |= e->new_encoding << 4; 1683 gap_size = e->bytes - enctbl[e->new_encoding].bytes; 1684 gap = insn + posn + enctbl[e->new_encoding].bytes; 1685 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes]; 1686 break; 1687 } 1688 if (relax_relocs == 2) 1689 srel ++; 1690 posn += e->bytes; 1691 1692 goto try_1addr_16; 1693 1694 case R_M32C_RL_1ADDR: 1695 /* xxxx xxxx xxxx dest [disp] */ 1696 1697 enctbl = m16c_addr_encodings; 1698 posn = 2; 1699 1700 /* Check the opcode for jumps. We know it's safe to 1701 do this because all 2ADDR insns are at least two 1702 bytes long. */ 1703 enc = insn[0] * 256 + insn[1]; 1704 enc &= 0xfff0; 1705 if (enc == 0x7d20 1706 || enc == 0x7d00 1707 || enc == 0x7d30 1708 || enc == 0x7d10) 1709 { 1710 enctbl = m16c_jmpaddr_encodings; 1711 } 1712 1713 try_1addr_16: 1714 /* srel, posn, and enc must be set here. */ 1715 1716 symval = OFFSET_FOR_RELOC (srel); 1717 enc = insn[1] & 0x0f; 1718 e = & enctbl[enc]; 1719 1720 if (srel->r_offset == irel->r_offset + posn 1721 && e->new_encoding != enc 1722 && symval <= e->max_disp) 1723 { 1724 insn[1] &= 0xf0; 1725 insn[1] |= e->new_encoding; 1726 gap_size = e->bytes - enctbl[e->new_encoding].bytes; 1727 gap = insn + posn + enctbl[e->new_encoding].bytes; 1728 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes]; 1729 break; 1730 } 1731 1732 break; 1733 1734 } /* Ends switch (reloc type) for m16c. */ 1735 } 1736 else /* machine == bfd_mach_m32c */ 1737 { 1738 /* M32CM / M32C */ 1739 1740 switch (ELF32_R_TYPE(irel->r_info)) 1741 { 1742 1743 case R_M32C_RL_JUMP: 1744 switch (insn[0]) 1745 { 1746 case 0xbb: /* jmp.b */ 1747 if (pcrel >= 2 && pcrel <= 9) 1748 { 1749 int p = pcrel - 2; 1750 /* Relax JMP.B -> JMP.S. We need to get rid of 1751 the following reloc though. */ 1752 insn[0] = 0x4a | ((p << 3) & 0x30) | (p & 1); 1753 new_type = R_M32C_NONE; 1754 irel->r_addend = 0x10; 1755 gap_size = 1; 1756 gap = insn + 1; 1757 } 1758 break; 1759 1760 case 0xce: /* jmp.w */ 1761 if (pcrel <= 128 && pcrel >= -128) 1762 { 1763 /* Relax JMP.W -> JMP.B */ 1764 insn[0] = 0xbb; 1765 insn[1] = 0; 1766 new_type = R_M32C_8_PCREL; 1767 gap_size = 1; 1768 gap = insn + 2; 1769 } 1770 break; 1771 1772 case 0xcc: /* jmp.a */ 1773 if (pcrel <= 32768 && pcrel >= -32768) 1774 { 1775 /* Relax JMP.A -> JMP.W */ 1776 insn[0] = 0xce; 1777 insn[1] = 0; 1778 insn[2] = 0; 1779 new_type = R_M32C_16_PCREL; 1780 gap_size = 1; 1781 gap = insn + 3; 1782 } 1783 break; 1784 1785 case 0xcd: /* jsr.a */ 1786 if (pcrel <= 32768 && pcrel >= -32768) 1787 { 1788 /* Relax JSR.A -> JSR.W */ 1789 insn[0] = 0xcf; 1790 insn[1] = 0; 1791 insn[2] = 0; 1792 new_type = R_M32C_16_PCREL; 1793 gap_size = 1; 1794 gap = insn + 3; 1795 } 1796 break; 1797 } 1798 break; 1799 1800 case R_M32C_RL_2ADDR: 1801 /* xSSS DDDx DDSS xxxx [src-disp] [dest-disp]*/ 1802 1803 einsn = insn; 1804 posn = 2; 1805 if (einsn[0] == 1) 1806 { 1807 /* prefix; remove it as far as the RL reloc is concerned. */ 1808 einsn ++; 1809 posn ++; 1810 } 1811 1812 enctbl = m32c_addr_encodings; 1813 enc = ((einsn[0] & 0x70) >> 2) | ((einsn[1] & 0x30) >> 4); 1814 e = & enctbl[enc]; 1815 1816 if (srel->r_offset == irel->r_offset + posn 1817 && e->new_encoding != enc 1818 && symval <= e->max_disp) 1819 { 1820 einsn[0] &= 0x8f; 1821 einsn[0] |= (e->new_encoding & 0x1c) << 2; 1822 einsn[1] &= 0xcf; 1823 einsn[1] |= (e->new_encoding & 0x03) << 4; 1824 gap_size = e->bytes - enctbl[e->new_encoding].bytes; 1825 gap = insn + posn + enctbl[e->new_encoding].bytes; 1826 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes]; 1827 break; 1828 } 1829 if (relax_relocs == 2) 1830 srel ++; 1831 posn += e->bytes; 1832 1833 goto try_1addr_32; 1834 1835 case R_M32C_RL_1ADDR: 1836 /* xxxx DDDx DDxx xxxx [disp] */ 1837 1838 einsn = insn; 1839 posn = 2; 1840 if (einsn[0] == 1) 1841 { 1842 /* prefix; remove it as far as the RL reloc is concerned. */ 1843 einsn ++; 1844 posn ++; 1845 } 1846 1847 enctbl = m32c_addr_encodings; 1848 1849 try_1addr_32: 1850 /* srel, posn, and enc must be set here. */ 1851 1852 symval = OFFSET_FOR_RELOC (srel); 1853 enc = ((einsn[0] & 0x0e) << 1) | ((einsn[1] & 0xc0) >> 6); 1854 e = & enctbl[enc]; 1855 1856 if (srel->r_offset == irel->r_offset + posn 1857 && e->new_encoding != enc 1858 && symval <= e->max_disp) 1859 { 1860 einsn[0] &= 0xf1; 1861 einsn[0] |= (e->new_encoding & 0x1c) >> 1; 1862 einsn[1] &= 0x3f; 1863 einsn[1] |= (e->new_encoding & 0x03) << 6; 1864 gap_size = e->bytes - enctbl[e->new_encoding].bytes; 1865 gap = insn + posn + enctbl[e->new_encoding].bytes; 1866 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes]; 1867 break; 1868 } 1869 1870 break; 1871 1872 } /* Ends switch (reloc type) for m32c. */ 1873 } 1874 1875 if (gap_size == 0) 1876 continue; 1877 1878 *again = TRUE; 1879 1880 srel->r_info = ELF32_R_INFO (ELF32_R_SYM (srel->r_info), new_type); 1881 1882 /* Note that we've changed the relocs, section contents, etc. */ 1883 elf_section_data (sec)->relocs = internal_relocs; 1884 free_relocs = NULL; 1885 1886 elf_section_data (sec)->this_hdr.contents = contents; 1887 free_contents = NULL; 1888 1889 symtab_hdr->contents = (bfd_byte *) intsyms; 1890 free_intsyms = NULL; 1891 1892 bytes_saved += gap_size; 1893 1894 if (! m32c_elf_relax_delete_bytes(abfd, sec, gap - contents, gap_size)) 1895 goto error_return; 1896 1897 } /* next relocation */ 1898 1899 if (free_relocs != NULL) 1900 { 1901 free (free_relocs); 1902 free_relocs = NULL; 1903 } 1904 1905 if (free_contents != NULL) 1906 { 1907 if (! link_info->keep_memory) 1908 free (free_contents); 1909 /* Cache the section contents for elf_link_input_bfd. */ 1910 else 1911 elf_section_data (sec)->this_hdr.contents = contents; 1912 1913 free_contents = NULL; 1914 } 1915 1916 if (shndx_buf != NULL) 1917 { 1918 shndx_hdr->contents = NULL; 1919 free (shndx_buf); 1920 } 1921 1922 if (free_intsyms != NULL) 1923 { 1924 if (! link_info->keep_memory) 1925 free (free_intsyms); 1926 /* Cache the symbols for elf_link_input_bfd. */ 1927 else 1928 { 1929 symtab_hdr->contents = NULL /* (unsigned char *) intsyms*/; 1930 } 1931 1932 free_intsyms = NULL; 1933 } 1934 1935 return TRUE; 1936 1937 error_return: 1938 if (free_relocs != NULL) 1939 free (free_relocs); 1940 if (free_contents != NULL) 1941 free (free_contents); 1942 if (shndx_buf != NULL) 1943 { 1944 shndx_hdr->contents = NULL; 1945 free (shndx_buf); 1946 } 1947 if (free_intsyms != NULL) 1948 free (free_intsyms); 1949 return FALSE; 1950 } 1951 1952 /* Delete some bytes from a section while relaxing. */ 1953 1954 static bfd_boolean 1955 m32c_elf_relax_delete_bytes 1956 (bfd * abfd, 1957 asection * sec, 1958 bfd_vma addr, 1959 int count) 1960 { 1961 Elf_Internal_Shdr *symtab_hdr; 1962 Elf_Internal_Shdr *shndx_hdr; 1963 int sec_shndx; 1964 bfd_byte *contents; 1965 Elf_Internal_Rela *irel; 1966 Elf_Internal_Rela *irelend; 1967 bfd_vma toaddr; 1968 Elf_Internal_Sym *isym; 1969 Elf_Internal_Sym *isymend; 1970 Elf_Internal_Sym *intsyms; 1971 Elf_External_Sym_Shndx *shndx_buf; 1972 Elf_External_Sym_Shndx *shndx; 1973 struct elf_link_hash_entry ** sym_hashes; 1974 struct elf_link_hash_entry ** end_hashes; 1975 unsigned int symcount; 1976 1977 contents = elf_section_data (sec)->this_hdr.contents; 1978 1979 toaddr = sec->size; 1980 1981 irel = elf_section_data (sec)->relocs; 1982 irelend = irel + sec->reloc_count; 1983 1984 /* Actually delete the bytes. */ 1985 memmove (contents + addr, contents + addr + count, (size_t) (toaddr - addr - count)); 1986 sec->size -= count; 1987 1988 /* Adjust all the relocs. */ 1989 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel ++) 1990 { 1991 /* Get the new reloc address. */ 1992 if (irel->r_offset > addr && irel->r_offset < toaddr) 1993 irel->r_offset -= count; 1994 1995 if (ELF32_R_TYPE(irel->r_info) == R_M32C_RL_JUMP 1996 && irel->r_addend == 0x10 /* one byte insn, no relocs */ 1997 && irel->r_offset + 1 < addr 1998 && irel->r_offset + 7 > addr) 1999 { 2000 bfd_vma disp; 2001 unsigned char *insn = &contents[irel->r_offset]; 2002 disp = *insn; 2003 /* This is a JMP.S, which we have to manually update. */ 2004 if (elf32_m32c_machine (abfd) == bfd_mach_m16c) 2005 { 2006 if ((*insn & 0xf8) != 0x60) 2007 continue; 2008 disp = (disp & 7); 2009 } 2010 else 2011 { 2012 if ((*insn & 0xce) != 0x4a) 2013 continue; 2014 disp = ((disp & 0x30) >> 3) | (disp & 1); 2015 } 2016 if (irel->r_offset + disp + 2 >= addr+count) 2017 { 2018 disp -= count; 2019 if (elf32_m32c_machine (abfd) == bfd_mach_m16c) 2020 { 2021 *insn = (*insn & 0xf8) | disp; 2022 } 2023 else 2024 { 2025 *insn = (*insn & 0xce) | ((disp & 6) << 3) | (disp & 1); 2026 } 2027 } 2028 } 2029 } 2030 2031 /* Adjust the local symbols defined in this section. */ 2032 symtab_hdr = & elf_tdata (abfd)->symtab_hdr; 2033 intsyms = (Elf_Internal_Sym *) symtab_hdr->contents; 2034 isym = intsyms; 2035 isymend = isym + symtab_hdr->sh_info; 2036 2037 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); 2038 if (elf_symtab_shndx_list (abfd)) 2039 { 2040 shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr; 2041 shndx_buf = (Elf_External_Sym_Shndx *) shndx_hdr->contents; 2042 } 2043 else 2044 { 2045 shndx_hdr = NULL; 2046 shndx_buf = NULL; 2047 } 2048 shndx = shndx_buf; 2049 2050 for (; isym < isymend; isym++, shndx = (shndx ? shndx + 1 : NULL)) 2051 { 2052 /* If the symbol is in the range of memory we just moved, we 2053 have to adjust its value. */ 2054 if ((int) isym->st_shndx == sec_shndx 2055 && isym->st_value > addr 2056 && isym->st_value < toaddr) 2057 { 2058 isym->st_value -= count; 2059 } 2060 /* If the symbol *spans* the bytes we just deleted (i.e. it's 2061 *end* is in the moved bytes but it's *start* isn't), then we 2062 must adjust its size. */ 2063 if ((int) isym->st_shndx == sec_shndx 2064 && isym->st_value < addr 2065 && isym->st_value + isym->st_size > addr 2066 && isym->st_value + isym->st_size < toaddr) 2067 { 2068 isym->st_size -= count; 2069 } 2070 } 2071 2072 /* Now adjust the global symbols defined in this section. */ 2073 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) 2074 - symtab_hdr->sh_info); 2075 sym_hashes = elf_sym_hashes (abfd); 2076 // sym_hashes += symtab_hdr->sh_info; 2077 end_hashes = sym_hashes + symcount; 2078 2079 for (; sym_hashes < end_hashes; sym_hashes ++) 2080 { 2081 struct elf_link_hash_entry * sym_hash = * sym_hashes; 2082 2083 if (sym_hash && 2084 (sym_hash->root.type == bfd_link_hash_defined 2085 || sym_hash->root.type == bfd_link_hash_defweak) 2086 && sym_hash->root.u.def.section == sec) 2087 { 2088 if (sym_hash->root.u.def.value > addr 2089 && sym_hash->root.u.def.value < toaddr) 2090 { 2091 sym_hash->root.u.def.value -= count; 2092 } 2093 if (sym_hash->root.u.def.value < addr 2094 && sym_hash->root.u.def.value + sym_hash->size > addr 2095 && sym_hash->root.u.def.value + sym_hash->size < toaddr) 2096 { 2097 sym_hash->size -= count; 2098 } 2099 } 2100 } 2101 2102 return TRUE; 2103 } 2104 2105 /* This is for versions of gcc prior to 4.3. */ 2106 static unsigned int 2107 _bfd_m32c_elf_eh_frame_address_size (bfd *abfd, 2108 const asection *sec ATTRIBUTE_UNUSED) 2109 { 2110 if ((elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK) == EF_M32C_CPU_M16C) 2111 return 2; 2112 return 4; 2113 } 2114 2115 2116 2117 #define ELF_ARCH bfd_arch_m32c 2118 #define ELF_MACHINE_CODE EM_M32C 2119 #define ELF_MACHINE_ALT1 EM_M32C_OLD 2120 #define ELF_MAXPAGESIZE 0x100 2121 2122 #if 0 2123 #define TARGET_BIG_SYM m32c_elf32_vec 2124 #define TARGET_BIG_NAME "elf32-m32c" 2125 #else 2126 #define TARGET_LITTLE_SYM m32c_elf32_vec 2127 #define TARGET_LITTLE_NAME "elf32-m32c" 2128 #endif 2129 2130 #define elf_info_to_howto_rel NULL 2131 #define elf_info_to_howto m32c_info_to_howto_rela 2132 #define elf_backend_object_p m32c_elf_object_p 2133 #define elf_backend_relocate_section m32c_elf_relocate_section 2134 #define elf_backend_check_relocs m32c_elf_check_relocs 2135 #define elf_backend_object_p m32c_elf_object_p 2136 #define elf_symbol_leading_char ('_') 2137 #define elf_backend_always_size_sections \ 2138 m32c_elf_always_size_sections 2139 #define elf_backend_finish_dynamic_sections \ 2140 m32c_elf_finish_dynamic_sections 2141 2142 #define elf_backend_can_gc_sections 1 2143 #define elf_backend_eh_frame_address_size _bfd_m32c_elf_eh_frame_address_size 2144 2145 #define bfd_elf32_bfd_reloc_type_lookup m32c_reloc_type_lookup 2146 #define bfd_elf32_bfd_reloc_name_lookup m32c_reloc_name_lookup 2147 #define bfd_elf32_bfd_relax_section m32c_elf_relax_section 2148 #define bfd_elf32_bfd_set_private_flags m32c_elf_set_private_flags 2149 #define bfd_elf32_bfd_merge_private_bfd_data m32c_elf_merge_private_bfd_data 2150 #define bfd_elf32_bfd_print_private_bfd_data m32c_elf_print_private_bfd_data 2151 2152 #include "elf32-target.h" 2153