1 /* BFD back-end for Renesas H8/300 ELF binaries. 2 Copyright 1993, 1995, 1998, 1999, 2001, 2002, 2003, 2004 3 Free Software Foundation, Inc. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 2 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 20 21 #include "bfd.h" 22 #include "sysdep.h" 23 #include "libbfd.h" 24 #include "elf-bfd.h" 25 #include "elf/h8.h" 26 27 static reloc_howto_type *elf32_h8_reloc_type_lookup 28 (bfd *abfd, bfd_reloc_code_real_type code); 29 static void elf32_h8_info_to_howto 30 (bfd *, arelent *, Elf_Internal_Rela *); 31 static void elf32_h8_info_to_howto_rel 32 (bfd *, arelent *, Elf_Internal_Rela *); 33 static unsigned long elf32_h8_mach (flagword); 34 static void elf32_h8_final_write_processing (bfd *, bfd_boolean); 35 static bfd_boolean elf32_h8_object_p (bfd *); 36 static bfd_boolean elf32_h8_merge_private_bfd_data (bfd *, bfd *); 37 static bfd_boolean elf32_h8_relax_section 38 (bfd *, asection *, struct bfd_link_info *, bfd_boolean *); 39 static bfd_boolean elf32_h8_relax_delete_bytes 40 (bfd *, asection *, bfd_vma, int); 41 static bfd_boolean elf32_h8_symbol_address_p (bfd *, asection *, bfd_vma); 42 static bfd_byte *elf32_h8_get_relocated_section_contents 43 (bfd *, struct bfd_link_info *, struct bfd_link_order *, 44 bfd_byte *, bfd_boolean, asymbol **); 45 static asection *elf32_h8_gc_mark_hook 46 (asection *, struct bfd_link_info *, Elf_Internal_Rela *, 47 struct elf_link_hash_entry *, Elf_Internal_Sym *); 48 static bfd_boolean elf32_h8_gc_sweep_hook 49 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); 50 static bfd_reloc_status_type elf32_h8_final_link_relocate 51 (unsigned long, bfd *, bfd *, asection *, 52 bfd_byte *, bfd_vma, bfd_vma, bfd_vma, 53 struct bfd_link_info *, asection *, int); 54 static bfd_boolean elf32_h8_relocate_section 55 (bfd *, struct bfd_link_info *, bfd *, asection *, 56 bfd_byte *, Elf_Internal_Rela *, 57 Elf_Internal_Sym *, asection **); 58 static bfd_reloc_status_type special 59 (bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **); 60 61 /* This does not include any relocation information, but should be 62 good enough for GDB or objdump to read the file. */ 63 64 static reloc_howto_type h8_elf_howto_table[] = { 65 #define R_H8_NONE_X 0 66 HOWTO (R_H8_NONE, /* type */ 67 0, /* rightshift */ 68 0, /* size (0 = byte, 1 = short, 2 = long) */ 69 0, /* bitsize */ 70 FALSE, /* pc_relative */ 71 0, /* bitpos */ 72 complain_overflow_dont,/* complain_on_overflow */ 73 special, /* special_function */ 74 "R_H8_NONE", /* name */ 75 FALSE, /* partial_inplace */ 76 0, /* src_mask */ 77 0, /* dst_mask */ 78 FALSE), /* pcrel_offset */ 79 #define R_H8_DIR32_X (R_H8_NONE_X + 1) 80 HOWTO (R_H8_DIR32, /* type */ 81 0, /* rightshift */ 82 2, /* size (0 = byte, 1 = short, 2 = long) */ 83 32, /* bitsize */ 84 FALSE, /* pc_relative */ 85 0, /* bitpos */ 86 complain_overflow_dont,/* complain_on_overflow */ 87 special, /* special_function */ 88 "R_H8_DIR32", /* name */ 89 FALSE, /* partial_inplace */ 90 0, /* src_mask */ 91 0xffffffff, /* dst_mask */ 92 FALSE), /* pcrel_offset */ 93 #define R_H8_DIR16_X (R_H8_DIR32_X + 1) 94 HOWTO (R_H8_DIR16, /* type */ 95 0, /* rightshift */ 96 1, /* size (0 = byte, 1 = short, 2 = long) */ 97 16, /* bitsize */ 98 FALSE, /* pc_relative */ 99 0, /* bitpos */ 100 complain_overflow_dont,/* complain_on_overflow */ 101 special, /* special_function */ 102 "R_H8_DIR16", /* name */ 103 FALSE, /* partial_inplace */ 104 0, /* src_mask */ 105 0x0000ffff, /* dst_mask */ 106 FALSE), /* pcrel_offset */ 107 #define R_H8_DIR8_X (R_H8_DIR16_X + 1) 108 HOWTO (R_H8_DIR8, /* type */ 109 0, /* rightshift */ 110 0, /* size (0 = byte, 1 = short, 2 = long) */ 111 8, /* bitsize */ 112 FALSE, /* pc_relative */ 113 0, /* bitpos */ 114 complain_overflow_dont,/* complain_on_overflow */ 115 special, /* special_function */ 116 "R_H8_DIR8", /* name */ 117 FALSE, /* partial_inplace */ 118 0, /* src_mask */ 119 0x000000ff, /* dst_mask */ 120 FALSE), /* pcrel_offset */ 121 #define R_H8_DIR16A8_X (R_H8_DIR8_X + 1) 122 HOWTO (R_H8_DIR16A8, /* type */ 123 0, /* rightshift */ 124 1, /* size (0 = byte, 1 = short, 2 = long) */ 125 16, /* bitsize */ 126 FALSE, /* pc_relative */ 127 0, /* bitpos */ 128 complain_overflow_bitfield, /* complain_on_overflow */ 129 special, /* special_function */ 130 "R_H8_DIR16A8", /* name */ 131 FALSE, /* partial_inplace */ 132 0, /* src_mask */ 133 0x0000ffff, /* dst_mask */ 134 FALSE), /* pcrel_offset */ 135 #define R_H8_DIR16R8_X (R_H8_DIR16A8_X + 1) 136 HOWTO (R_H8_DIR16R8, /* type */ 137 0, /* rightshift */ 138 1, /* size (0 = byte, 1 = short, 2 = long) */ 139 16, /* bitsize */ 140 FALSE, /* pc_relative */ 141 0, /* bitpos */ 142 complain_overflow_bitfield, /* complain_on_overflow */ 143 special, /* special_function */ 144 "R_H8_DIR16R8", /* name */ 145 FALSE, /* partial_inplace */ 146 0, /* src_mask */ 147 0x0000ffff, /* dst_mask */ 148 FALSE), /* pcrel_offset */ 149 #define R_H8_DIR24A8_X (R_H8_DIR16R8_X + 1) 150 HOWTO (R_H8_DIR24A8, /* type */ 151 0, /* rightshift */ 152 2, /* size (0 = byte, 1 = short, 2 = long) */ 153 24, /* bitsize */ 154 FALSE, /* pc_relative */ 155 0, /* bitpos */ 156 complain_overflow_bitfield, /* complain_on_overflow */ 157 special, /* special_function */ 158 "R_H8_DIR24A8", /* name */ 159 TRUE, /* partial_inplace */ 160 0xff000000, /* src_mask */ 161 0x00ffffff, /* dst_mask */ 162 FALSE), /* pcrel_offset */ 163 #define R_H8_DIR24R8_X (R_H8_DIR24A8_X + 1) 164 HOWTO (R_H8_DIR24R8, /* type */ 165 0, /* rightshift */ 166 2, /* size (0 = byte, 1 = short, 2 = long) */ 167 24, /* bitsize */ 168 FALSE, /* pc_relative */ 169 0, /* bitpos */ 170 complain_overflow_bitfield, /* complain_on_overflow */ 171 special, /* special_function */ 172 "R_H8_DIR24R8", /* name */ 173 TRUE, /* partial_inplace */ 174 0xff000000, /* src_mask */ 175 0x00ffffff, /* dst_mask */ 176 FALSE), /* pcrel_offset */ 177 #define R_H8_DIR32A16_X (R_H8_DIR24R8_X + 1) 178 HOWTO (R_H8_DIR32A16, /* type */ 179 0, /* rightshift */ 180 2, /* size (0 = byte, 1 = short, 2 = long) */ 181 32, /* bitsize */ 182 FALSE, /* pc_relative */ 183 0, /* bitpos */ 184 complain_overflow_dont,/* complain_on_overflow */ 185 special, /* special_function */ 186 "R_H8_DIR32A16", /* name */ 187 FALSE, /* partial_inplace */ 188 0, /* src_mask */ 189 0xffffffff, /* dst_mask */ 190 FALSE), /* pcrel_offset */ 191 #define R_H8_PCREL16_X (R_H8_DIR32A16_X + 1) 192 HOWTO (R_H8_PCREL16, /* type */ 193 0, /* rightshift */ 194 1, /* size (0 = byte, 1 = short, 2 = long) */ 195 16, /* bitsize */ 196 TRUE, /* pc_relative */ 197 0, /* bitpos */ 198 complain_overflow_signed,/* complain_on_overflow */ 199 special, /* special_function */ 200 "R_H8_PCREL16", /* name */ 201 FALSE, /* partial_inplace */ 202 0xffff, /* src_mask */ 203 0xffff, /* dst_mask */ 204 TRUE), /* pcrel_offset */ 205 #define R_H8_PCREL8_X (R_H8_PCREL16_X + 1) 206 HOWTO (R_H8_PCREL8, /* type */ 207 0, /* rightshift */ 208 0, /* size (0 = byte, 1 = short, 2 = long) */ 209 8, /* bitsize */ 210 TRUE, /* pc_relative */ 211 0, /* bitpos */ 212 complain_overflow_signed,/* complain_on_overflow */ 213 special, /* special_function */ 214 "R_H8_PCREL8", /* name */ 215 FALSE, /* partial_inplace */ 216 0xff, /* src_mask */ 217 0xff, /* dst_mask */ 218 TRUE), /* pcrel_offset */ 219 }; 220 221 /* This structure is used to map BFD reloc codes to H8 ELF relocs. */ 222 223 struct elf_reloc_map { 224 bfd_reloc_code_real_type bfd_reloc_val; 225 unsigned char howto_index; 226 }; 227 228 /* An array mapping BFD reloc codes to H8 ELF relocs. */ 229 230 static const struct elf_reloc_map h8_reloc_map[] = { 231 { BFD_RELOC_NONE, R_H8_NONE_X }, 232 { BFD_RELOC_32, R_H8_DIR32_X }, 233 { BFD_RELOC_16, R_H8_DIR16_X }, 234 { BFD_RELOC_8, R_H8_DIR8_X }, 235 { BFD_RELOC_H8_DIR16A8, R_H8_DIR16A8_X }, 236 { BFD_RELOC_H8_DIR16R8, R_H8_DIR16R8_X }, 237 { BFD_RELOC_H8_DIR24A8, R_H8_DIR24A8_X }, 238 { BFD_RELOC_H8_DIR24R8, R_H8_DIR24R8_X }, 239 { BFD_RELOC_H8_DIR32A16, R_H8_DIR32A16_X }, 240 { BFD_RELOC_16_PCREL, R_H8_PCREL16_X }, 241 { BFD_RELOC_8_PCREL, R_H8_PCREL8_X }, 242 }; 243 244 245 static reloc_howto_type * 246 elf32_h8_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 247 bfd_reloc_code_real_type code) 248 { 249 unsigned int i; 250 251 for (i = 0; i < sizeof (h8_reloc_map) / sizeof (struct elf_reloc_map); i++) 252 { 253 if (h8_reloc_map[i].bfd_reloc_val == code) 254 return &h8_elf_howto_table[(int) h8_reloc_map[i].howto_index]; 255 } 256 return NULL; 257 } 258 259 static void 260 elf32_h8_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc, 261 Elf_Internal_Rela *elf_reloc) 262 { 263 unsigned int r; 264 unsigned int i; 265 266 r = ELF32_R_TYPE (elf_reloc->r_info); 267 for (i = 0; i < sizeof (h8_elf_howto_table) / sizeof (reloc_howto_type); i++) 268 if (h8_elf_howto_table[i].type == r) 269 { 270 bfd_reloc->howto = &h8_elf_howto_table[i]; 271 return; 272 } 273 abort (); 274 } 275 276 static void 277 elf32_h8_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc, 278 Elf_Internal_Rela *elf_reloc ATTRIBUTE_UNUSED) 279 { 280 unsigned int r; 281 282 abort (); 283 r = ELF32_R_TYPE (elf_reloc->r_info); 284 bfd_reloc->howto = &h8_elf_howto_table[r]; 285 } 286 287 /* Special handling for H8/300 relocs. 288 We only come here for pcrel stuff and return normally if not an -r link. 289 When doing -r, we can't do any arithmetic for the pcrel stuff, because 290 we support relaxing on the H8/300 series chips. */ 291 static bfd_reloc_status_type 292 special (bfd *abfd ATTRIBUTE_UNUSED, 293 arelent *reloc_entry ATTRIBUTE_UNUSED, 294 asymbol *symbol ATTRIBUTE_UNUSED, 295 PTR data ATTRIBUTE_UNUSED, 296 asection *input_section ATTRIBUTE_UNUSED, 297 bfd *output_bfd, 298 char **error_message ATTRIBUTE_UNUSED) 299 { 300 if (output_bfd == (bfd *) NULL) 301 return bfd_reloc_continue; 302 303 /* Adjust the reloc address to that in the output section. */ 304 reloc_entry->address += input_section->output_offset; 305 return bfd_reloc_ok; 306 } 307 308 /* Perform a relocation as part of a final link. */ 309 static bfd_reloc_status_type 310 elf32_h8_final_link_relocate (unsigned long r_type, bfd *input_bfd, 311 bfd *output_bfd ATTRIBUTE_UNUSED, 312 asection *input_section ATTRIBUTE_UNUSED, 313 bfd_byte *contents, bfd_vma offset, 314 bfd_vma value, bfd_vma addend, 315 struct bfd_link_info *info ATTRIBUTE_UNUSED, 316 asection *sym_sec ATTRIBUTE_UNUSED, 317 int is_local ATTRIBUTE_UNUSED) 318 { 319 bfd_byte *hit_data = contents + offset; 320 321 switch (r_type) 322 { 323 case R_H8_NONE: 324 return bfd_reloc_ok; 325 326 case R_H8_DIR32: 327 case R_H8_DIR32A16: 328 case R_H8_DIR24A8: 329 value += addend; 330 bfd_put_32 (input_bfd, value, hit_data); 331 return bfd_reloc_ok; 332 333 case R_H8_DIR16: 334 case R_H8_DIR16A8: 335 case R_H8_DIR16R8: 336 value += addend; 337 bfd_put_16 (input_bfd, value, hit_data); 338 return bfd_reloc_ok; 339 340 /* AKA R_RELBYTE */ 341 case R_H8_DIR8: 342 value += addend; 343 344 bfd_put_8 (input_bfd, value, hit_data); 345 return bfd_reloc_ok; 346 347 case R_H8_DIR24R8: 348 value += addend; 349 350 /* HIT_DATA is the address for the first byte for the relocated 351 value. Subtract 1 so that we can manipulate the data in 32-bit 352 hunks. */ 353 hit_data--; 354 355 /* Clear out the top byte in value. */ 356 value &= 0xffffff; 357 358 /* Retrieve the type byte for value from the section contents. */ 359 value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000); 360 361 /* Now scribble it out in one 32-bit hunk. */ 362 bfd_put_32 (input_bfd, value, hit_data); 363 return bfd_reloc_ok; 364 365 case R_H8_PCREL16: 366 value -= (input_section->output_section->vma 367 + input_section->output_offset); 368 value -= offset; 369 value += addend; 370 371 /* The value is relative to the start of the instruction, 372 not the relocation offset. Subtract 2 to account for 373 this minor issue. */ 374 value -= 2; 375 376 bfd_put_16 (input_bfd, value, hit_data); 377 return bfd_reloc_ok; 378 379 case R_H8_PCREL8: 380 value -= (input_section->output_section->vma 381 + input_section->output_offset); 382 value -= offset; 383 value += addend; 384 385 /* The value is relative to the start of the instruction, 386 not the relocation offset. Subtract 1 to account for 387 this minor issue. */ 388 value -= 1; 389 390 bfd_put_8 (input_bfd, value, hit_data); 391 return bfd_reloc_ok; 392 393 default: 394 return bfd_reloc_notsupported; 395 } 396 } 397 398 /* Relocate an H8 ELF section. */ 399 static bfd_boolean 400 elf32_h8_relocate_section (bfd *output_bfd, struct bfd_link_info *info, 401 bfd *input_bfd, asection *input_section, 402 bfd_byte *contents, Elf_Internal_Rela *relocs, 403 Elf_Internal_Sym *local_syms, 404 asection **local_sections) 405 { 406 Elf_Internal_Shdr *symtab_hdr; 407 struct elf_link_hash_entry **sym_hashes; 408 Elf_Internal_Rela *rel, *relend; 409 410 if (info->relocatable) 411 return TRUE; 412 413 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 414 sym_hashes = elf_sym_hashes (input_bfd); 415 416 rel = relocs; 417 relend = relocs + input_section->reloc_count; 418 for (; rel < relend; rel++) 419 { 420 unsigned int r_type; 421 unsigned long r_symndx; 422 Elf_Internal_Sym *sym; 423 asection *sec; 424 struct elf_link_hash_entry *h; 425 bfd_vma relocation; 426 bfd_reloc_status_type r; 427 428 /* This is a final link. */ 429 r_symndx = ELF32_R_SYM (rel->r_info); 430 r_type = ELF32_R_TYPE (rel->r_info); 431 h = NULL; 432 sym = NULL; 433 sec = NULL; 434 if (r_symndx < symtab_hdr->sh_info) 435 { 436 sym = local_syms + r_symndx; 437 sec = local_sections[r_symndx]; 438 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 439 } 440 else 441 { 442 bfd_boolean unresolved_reloc, warned; 443 444 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 445 r_symndx, symtab_hdr, sym_hashes, 446 h, sec, relocation, 447 unresolved_reloc, warned); 448 } 449 450 r = elf32_h8_final_link_relocate (r_type, input_bfd, output_bfd, 451 input_section, 452 contents, rel->r_offset, 453 relocation, rel->r_addend, 454 info, sec, h == NULL); 455 456 if (r != bfd_reloc_ok) 457 { 458 const char *name; 459 const char *msg = (const char *) 0; 460 arelent bfd_reloc; 461 reloc_howto_type *howto; 462 463 elf32_h8_info_to_howto (input_bfd, &bfd_reloc, rel); 464 howto = bfd_reloc.howto; 465 466 if (h != NULL) 467 name = h->root.root.string; 468 else 469 { 470 name = (bfd_elf_string_from_elf_section 471 (input_bfd, symtab_hdr->sh_link, sym->st_name)); 472 if (name == NULL || *name == '\0') 473 name = bfd_section_name (input_bfd, sec); 474 } 475 476 switch (r) 477 { 478 case bfd_reloc_overflow: 479 if (! ((*info->callbacks->reloc_overflow) 480 (info, name, howto->name, (bfd_vma) 0, 481 input_bfd, input_section, rel->r_offset))) 482 return FALSE; 483 break; 484 485 case bfd_reloc_undefined: 486 if (! ((*info->callbacks->undefined_symbol) 487 (info, name, input_bfd, input_section, 488 rel->r_offset, TRUE))) 489 return FALSE; 490 break; 491 492 case bfd_reloc_outofrange: 493 msg = _("internal error: out of range error"); 494 goto common_error; 495 496 case bfd_reloc_notsupported: 497 msg = _("internal error: unsupported relocation error"); 498 goto common_error; 499 500 case bfd_reloc_dangerous: 501 msg = _("internal error: dangerous error"); 502 goto common_error; 503 504 default: 505 msg = _("internal error: unknown error"); 506 /* fall through */ 507 508 common_error: 509 if (!((*info->callbacks->warning) 510 (info, msg, name, input_bfd, input_section, 511 rel->r_offset))) 512 return FALSE; 513 break; 514 } 515 } 516 } 517 518 return TRUE; 519 } 520 521 /* Object files encode the specific H8 model they were compiled 522 for in the ELF flags field. 523 524 Examine that field and return the proper BFD machine type for 525 the object file. */ 526 static unsigned long 527 elf32_h8_mach (flagword flags) 528 { 529 switch (flags & EF_H8_MACH) 530 { 531 case E_H8_MACH_H8300: 532 default: 533 return bfd_mach_h8300; 534 535 case E_H8_MACH_H8300H: 536 return bfd_mach_h8300h; 537 538 case E_H8_MACH_H8300S: 539 return bfd_mach_h8300s; 540 541 case E_H8_MACH_H8300HN: 542 return bfd_mach_h8300hn; 543 544 case E_H8_MACH_H8300SN: 545 return bfd_mach_h8300sn; 546 547 case E_H8_MACH_H8300SX: 548 return bfd_mach_h8300sx; 549 550 case E_H8_MACH_H8300SXN: 551 return bfd_mach_h8300sxn; 552 } 553 } 554 555 /* The final processing done just before writing out a H8 ELF object 556 file. We use this opportunity to encode the BFD machine type 557 into the flags field in the object file. */ 558 559 static void 560 elf32_h8_final_write_processing (bfd *abfd, 561 bfd_boolean linker ATTRIBUTE_UNUSED) 562 { 563 unsigned long val; 564 565 switch (bfd_get_mach (abfd)) 566 { 567 default: 568 case bfd_mach_h8300: 569 val = E_H8_MACH_H8300; 570 break; 571 572 case bfd_mach_h8300h: 573 val = E_H8_MACH_H8300H; 574 break; 575 576 case bfd_mach_h8300s: 577 val = E_H8_MACH_H8300S; 578 break; 579 580 case bfd_mach_h8300hn: 581 val = E_H8_MACH_H8300HN; 582 break; 583 584 case bfd_mach_h8300sn: 585 val = E_H8_MACH_H8300SN; 586 break; 587 588 case bfd_mach_h8300sx: 589 val = E_H8_MACH_H8300SX; 590 break; 591 592 case bfd_mach_h8300sxn: 593 val = E_H8_MACH_H8300SXN; 594 break; 595 } 596 597 elf_elfheader (abfd)->e_flags &= ~ (EF_H8_MACH); 598 elf_elfheader (abfd)->e_flags |= val; 599 } 600 601 /* Return nonzero if ABFD represents a valid H8 ELF object file; also 602 record the encoded machine type found in the ELF flags. */ 603 604 static bfd_boolean 605 elf32_h8_object_p (bfd *abfd) 606 { 607 bfd_default_set_arch_mach (abfd, bfd_arch_h8300, 608 elf32_h8_mach (elf_elfheader (abfd)->e_flags)); 609 return TRUE; 610 } 611 612 /* Merge backend specific data from an object file to the output 613 object file when linking. The only data we need to copy at this 614 time is the architecture/machine information. */ 615 616 static bfd_boolean 617 elf32_h8_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 618 { 619 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 620 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 621 return TRUE; 622 623 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) 624 && bfd_get_mach (obfd) < bfd_get_mach (ibfd)) 625 { 626 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), 627 bfd_get_mach (ibfd))) 628 return FALSE; 629 } 630 631 return TRUE; 632 } 633 634 /* This function handles relaxing for the H8.. 635 636 There are a few relaxing opportunities available on the H8: 637 638 jmp/jsr:24 -> bra/bsr:8 2 bytes 639 The jmp may be completely eliminated if the previous insn is a 640 conditional branch to the insn after the jump. In that case 641 we invert the branch and delete the jump and save 4 bytes. 642 643 bCC:16 -> bCC:8 2 bytes 644 bsr:16 -> bsr:8 2 bytes 645 646 bset:16 -> bset:8 2 bytes 647 bset:24/32 -> bset:8 4 bytes 648 (also applicable to other bit manipulation instructions) 649 650 mov.b:16 -> mov.b:8 2 bytes 651 mov.b:24/32 -> mov.b:8 4 bytes 652 653 bset:24/32 -> bset:16 2 bytes 654 (also applicable to other bit manipulation instructions) 655 656 mov.[bwl]:24/32 -> mov.[bwl]:16 2 bytes */ 657 658 static bfd_boolean 659 elf32_h8_relax_section (bfd *abfd, asection *sec, 660 struct bfd_link_info *link_info, bfd_boolean *again) 661 { 662 Elf_Internal_Shdr *symtab_hdr; 663 Elf_Internal_Rela *internal_relocs; 664 Elf_Internal_Rela *irel, *irelend; 665 bfd_byte *contents = NULL; 666 Elf_Internal_Sym *isymbuf = NULL; 667 static asection *last_input_section = NULL; 668 static Elf_Internal_Rela *last_reloc = NULL; 669 670 /* Assume nothing changes. */ 671 *again = FALSE; 672 673 /* We don't have to do anything for a relocatable link, if 674 this section does not have relocs, or if this is not a 675 code section. */ 676 if (link_info->relocatable 677 || (sec->flags & SEC_RELOC) == 0 678 || sec->reloc_count == 0 679 || (sec->flags & SEC_CODE) == 0) 680 return TRUE; 681 682 /* If this is the first time we have been called for this section, 683 initialize the cooked size. */ 684 if (sec->_cooked_size == 0) 685 sec->_cooked_size = sec->_raw_size; 686 687 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 688 689 /* Get a copy of the native relocations. */ 690 internal_relocs = (_bfd_elf_link_read_relocs 691 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL, 692 link_info->keep_memory)); 693 if (internal_relocs == NULL) 694 goto error_return; 695 696 if (sec != last_input_section) 697 last_reloc = NULL; 698 699 last_input_section = sec; 700 701 /* Walk through the relocs looking for relaxing opportunities. */ 702 irelend = internal_relocs + sec->reloc_count; 703 for (irel = internal_relocs; irel < irelend; irel++) 704 { 705 bfd_vma symval; 706 707 /* Keep track of the previous reloc so that we can delete 708 some long jumps created by the compiler. */ 709 if (irel != internal_relocs) 710 last_reloc = irel - 1; 711 712 if (ELF32_R_TYPE (irel->r_info) != R_H8_DIR24R8 713 && ELF32_R_TYPE (irel->r_info) != R_H8_PCREL16 714 && ELF32_R_TYPE (irel->r_info) != R_H8_DIR16A8 715 && ELF32_R_TYPE (irel->r_info) != R_H8_DIR24A8 716 && ELF32_R_TYPE (irel->r_info) != R_H8_DIR32A16) 717 continue; 718 719 /* Get the section contents if we haven't done so already. */ 720 if (contents == NULL) 721 { 722 /* Get cached copy if it exists. */ 723 if (elf_section_data (sec)->this_hdr.contents != NULL) 724 contents = elf_section_data (sec)->this_hdr.contents; 725 else 726 { 727 /* Go get them off disk. */ 728 contents = (bfd_byte *) bfd_malloc (sec->_raw_size); 729 if (contents == NULL) 730 goto error_return; 731 732 if (! bfd_get_section_contents (abfd, sec, contents, 733 (file_ptr) 0, sec->_raw_size)) 734 goto error_return; 735 } 736 } 737 738 /* Read this BFD's local symbols if we haven't done so already. */ 739 if (isymbuf == NULL && symtab_hdr->sh_info != 0) 740 { 741 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 742 if (isymbuf == NULL) 743 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 744 symtab_hdr->sh_info, 0, 745 NULL, NULL, NULL); 746 if (isymbuf == NULL) 747 goto error_return; 748 } 749 750 /* Get the value of the symbol referred to by the reloc. */ 751 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 752 { 753 /* A local symbol. */ 754 Elf_Internal_Sym *isym; 755 asection *sym_sec; 756 757 isym = isymbuf + ELF32_R_SYM (irel->r_info); 758 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); 759 symval = isym->st_value; 760 /* If the reloc is absolute, it will not have 761 a symbol or section associated with it. */ 762 if (sym_sec) 763 symval += sym_sec->output_section->vma 764 + sym_sec->output_offset; 765 } 766 else 767 { 768 unsigned long indx; 769 struct elf_link_hash_entry *h; 770 771 /* An external symbol. */ 772 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 773 h = elf_sym_hashes (abfd)[indx]; 774 BFD_ASSERT (h != NULL); 775 if (h->root.type != bfd_link_hash_defined 776 && h->root.type != bfd_link_hash_defweak) 777 { 778 /* This appears to be a reference to an undefined 779 symbol. Just ignore it--it will be caught by the 780 regular reloc processing. */ 781 continue; 782 } 783 784 symval = (h->root.u.def.value 785 + h->root.u.def.section->output_section->vma 786 + h->root.u.def.section->output_offset); 787 } 788 789 /* For simplicity of coding, we are going to modify the section 790 contents, the section relocs, and the BFD symbol table. We 791 must tell the rest of the code not to free up this 792 information. It would be possible to instead create a table 793 of changes which have to be made, as is done in coff-mips.c; 794 that would be more work, but would require less memory when 795 the linker is run. */ 796 switch (ELF32_R_TYPE (irel->r_info)) 797 { 798 /* Try to turn a 24-bit absolute branch/call into an 8-bit 799 pc-relative branch/call. */ 800 case R_H8_DIR24R8: 801 { 802 bfd_vma value = symval + irel->r_addend; 803 bfd_vma dot, gap; 804 805 /* Get the address of this instruction. */ 806 dot = (sec->output_section->vma 807 + sec->output_offset + irel->r_offset - 1); 808 809 /* Compute the distance from this insn to the branch target. */ 810 gap = value - dot; 811 812 /* If the distance is within -126..+130 inclusive, then we can 813 relax this jump. +130 is valid since the target will move 814 two bytes closer if we do relax this branch. */ 815 if ((int) gap >= -126 && (int) gap <= 130) 816 { 817 unsigned char code; 818 819 /* Note that we've changed the relocs, section contents, 820 etc. */ 821 elf_section_data (sec)->relocs = internal_relocs; 822 elf_section_data (sec)->this_hdr.contents = contents; 823 symtab_hdr->contents = (unsigned char *) isymbuf; 824 825 /* Get the instruction code being relaxed. */ 826 code = bfd_get_8 (abfd, contents + irel->r_offset - 1); 827 828 /* If the previous instruction conditionally jumped around 829 this instruction, we may be able to reverse the condition 830 and redirect the previous instruction to the target of 831 this instruction. 832 833 Such sequences are used by the compiler to deal with 834 long conditional branches. 835 836 Only perform this optimisation for jumps (code 0x5a) not 837 subroutine calls, as otherwise it could transform: 838 839 mov.w r0,r0 840 beq .L1 841 jsr @_bar 842 .L1: rts 843 _bar: rts 844 into: 845 mov.w r0,r0 846 bne _bar 847 rts 848 _bar: rts 849 850 which changes the call (jsr) into a branch (bne). */ 851 if (code == 0x5a 852 && (int) gap <= 130 853 && (int) gap >= -128 854 && last_reloc 855 && ELF32_R_TYPE (last_reloc->r_info) == R_H8_PCREL8 856 && ELF32_R_SYM (last_reloc->r_info) < symtab_hdr->sh_info) 857 { 858 bfd_vma last_value; 859 asection *last_sym_sec; 860 Elf_Internal_Sym *last_sym; 861 862 /* We will need to examine the symbol used by the 863 previous relocation. */ 864 865 last_sym = isymbuf + ELF32_R_SYM (last_reloc->r_info); 866 last_sym_sec 867 = bfd_section_from_elf_index (abfd, last_sym->st_shndx); 868 last_value = (last_sym->st_value 869 + last_sym_sec->output_section->vma 870 + last_sym_sec->output_offset); 871 872 /* Verify that the previous relocation was for a 873 branch around this instruction and that no symbol 874 exists at the current location. */ 875 if (last_value == dot + 4 876 && last_reloc->r_offset + 2 == irel->r_offset 877 && ! elf32_h8_symbol_address_p (abfd, sec, dot)) 878 { 879 /* We can eliminate this jump. Twiddle the 880 previous relocation as necessary. */ 881 irel->r_info 882 = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 883 ELF32_R_TYPE (R_H8_NONE)); 884 885 last_reloc->r_info 886 = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 887 ELF32_R_TYPE (R_H8_PCREL8)); 888 last_reloc->r_addend = irel->r_addend; 889 890 code = bfd_get_8 (abfd, 891 contents + last_reloc->r_offset - 1); 892 code ^= 1; 893 bfd_put_8 (abfd, 894 code, 895 contents + last_reloc->r_offset - 1); 896 897 /* Delete four bytes of data. */ 898 if (!elf32_h8_relax_delete_bytes (abfd, sec, 899 irel->r_offset - 1, 900 4)) 901 goto error_return; 902 903 *again = TRUE; 904 break; 905 } 906 } 907 908 if (code == 0x5e) 909 /* This is jsr. */ 910 bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 1); 911 else if (code == 0x5a) 912 /* This is jmp. */ 913 bfd_put_8 (abfd, 0x40, contents + irel->r_offset - 1); 914 else 915 abort (); 916 917 /* Fix the relocation's type. */ 918 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 919 R_H8_PCREL8); 920 921 /* Delete two bytes of data. */ 922 if (!elf32_h8_relax_delete_bytes (abfd, sec, 923 irel->r_offset + 1, 2)) 924 goto error_return; 925 926 /* That will change things, so, we should relax again. 927 Note that this is not required, and it may be slow. */ 928 *again = TRUE; 929 } 930 break; 931 } 932 933 /* Try to turn a 16-bit pc-relative branch into a 8-bit pc-relative 934 branch. */ 935 case R_H8_PCREL16: 936 { 937 bfd_vma value = symval + irel->r_addend; 938 bfd_vma dot; 939 bfd_vma gap; 940 941 /* Get the address of this instruction. */ 942 dot = (sec->output_section->vma 943 + sec->output_offset 944 + irel->r_offset - 2); 945 946 gap = value - dot; 947 948 /* If the distance is within -126..+130 inclusive, then we can 949 relax this jump. +130 is valid since the target will move 950 two bytes closer if we do relax this branch. */ 951 if ((int) gap >= -126 && (int) gap <= 130) 952 { 953 unsigned char code; 954 955 /* Note that we've changed the relocs, section contents, 956 etc. */ 957 elf_section_data (sec)->relocs = internal_relocs; 958 elf_section_data (sec)->this_hdr.contents = contents; 959 symtab_hdr->contents = (unsigned char *) isymbuf; 960 961 /* Get the opcode. */ 962 code = bfd_get_8 (abfd, contents + irel->r_offset - 2); 963 964 if (code == 0x58) 965 { 966 /* bCC:16 -> bCC:8 */ 967 /* Get the second byte of the original insn, which 968 contains the condition code. */ 969 code = bfd_get_8 (abfd, contents + irel->r_offset - 1); 970 971 /* Compute the fisrt byte of the relaxed 972 instruction. The original sequence 0x58 0xX0 973 is relaxed to 0x4X, where X represents the 974 condition code. */ 975 code &= 0xf0; 976 code >>= 4; 977 code |= 0x40; 978 bfd_put_8 (abfd, code, contents + irel->r_offset - 2); 979 } 980 else if (code == 0x5c) 981 /* This is bsr. */ 982 bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 2); 983 else 984 abort (); 985 986 /* Fix the relocation's type. */ 987 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 988 R_H8_PCREL8); 989 irel->r_offset--; 990 991 /* Delete two bytes of data. */ 992 if (!elf32_h8_relax_delete_bytes (abfd, sec, 993 irel->r_offset + 1, 2)) 994 goto error_return; 995 996 /* That will change things, so, we should relax again. 997 Note that this is not required, and it may be slow. */ 998 *again = TRUE; 999 } 1000 break; 1001 } 1002 1003 /* This is a 16-bit absolute address in one of the following 1004 instructions: 1005 1006 "band", "bclr", "biand", "bild", "bior", "bist", "bixor", 1007 "bld", "bnot", "bor", "bset", "bst", "btst", "bxor", and 1008 "mov.b" 1009 1010 We may relax this into an 8-bit absolute address if it's in 1011 the right range. */ 1012 case R_H8_DIR16A8: 1013 { 1014 bfd_vma value; 1015 1016 value = bfd_h8300_pad_address (abfd, symval + irel->r_addend); 1017 if (value >= 0xffffff00u) 1018 { 1019 unsigned char code; 1020 unsigned char temp_code; 1021 1022 /* Note that we've changed the relocs, section contents, 1023 etc. */ 1024 elf_section_data (sec)->relocs = internal_relocs; 1025 elf_section_data (sec)->this_hdr.contents = contents; 1026 symtab_hdr->contents = (unsigned char *) isymbuf; 1027 1028 /* Get the opcode. */ 1029 code = bfd_get_8 (abfd, contents + irel->r_offset - 2); 1030 1031 /* All instructions with R_H8_DIR16A8 start with 1032 0x6a. */ 1033 if (code != 0x6a) 1034 abort (); 1035 1036 temp_code = code = bfd_get_8 (abfd, contents + irel->r_offset - 1); 1037 /* If this is a mov.b instruction, clear the lower 1038 nibble, which contains the source/destination 1039 register number. */ 1040 if ((temp_code & 0x10) != 0x10) 1041 temp_code &= 0xf0; 1042 1043 switch (temp_code) 1044 { 1045 case 0x00: 1046 /* This is mov.b @aa:16,Rd. */ 1047 bfd_put_8 (abfd, (code & 0xf) | 0x20, 1048 contents + irel->r_offset - 2); 1049 break; 1050 case 0x80: 1051 /* This is mov.b Rs,@aa:16. */ 1052 bfd_put_8 (abfd, (code & 0xf) | 0x30, 1053 contents + irel->r_offset - 2); 1054 break; 1055 case 0x18: 1056 /* This is a bit-maniputation instruction that 1057 stores one bit into memory, one of "bclr", 1058 "bist", "bnot", "bset", and "bst". */ 1059 bfd_put_8 (abfd, 0x7f, contents + irel->r_offset - 2); 1060 break; 1061 case 0x10: 1062 /* This is a bit-maniputation instruction that 1063 loads one bit from memory, one of "band", 1064 "biand", "bild", "bior", "bixor", "bld", "bor", 1065 "btst", and "bxor". */ 1066 bfd_put_8 (abfd, 0x7e, contents + irel->r_offset - 2); 1067 break; 1068 default: 1069 abort (); 1070 } 1071 1072 /* Fix the relocation's type. */ 1073 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 1074 R_H8_DIR8); 1075 1076 /* Move the relocation. */ 1077 irel->r_offset--; 1078 1079 /* Delete two bytes of data. */ 1080 if (!elf32_h8_relax_delete_bytes (abfd, sec, 1081 irel->r_offset + 1, 2)) 1082 goto error_return; 1083 1084 /* That will change things, so, we should relax again. 1085 Note that this is not required, and it may be slow. */ 1086 *again = TRUE; 1087 } 1088 break; 1089 } 1090 1091 /* This is a 24-bit absolute address in one of the following 1092 instructions: 1093 1094 "band", "bclr", "biand", "bild", "bior", "bist", "bixor", 1095 "bld", "bnot", "bor", "bset", "bst", "btst", "bxor", and 1096 "mov.b" 1097 1098 We may relax this into an 8-bit absolute address if it's in 1099 the right range. */ 1100 case R_H8_DIR24A8: 1101 { 1102 bfd_vma value; 1103 1104 value = bfd_h8300_pad_address (abfd, symval + irel->r_addend); 1105 if (value >= 0xffffff00u) 1106 { 1107 unsigned char code; 1108 unsigned char temp_code; 1109 1110 /* Note that we've changed the relocs, section contents, 1111 etc. */ 1112 elf_section_data (sec)->relocs = internal_relocs; 1113 elf_section_data (sec)->this_hdr.contents = contents; 1114 symtab_hdr->contents = (unsigned char *) isymbuf; 1115 1116 /* Get the opcode. */ 1117 code = bfd_get_8 (abfd, contents + irel->r_offset - 2); 1118 1119 /* All instructions with R_H8_DIR24A8 start with 1120 0x6a. */ 1121 if (code != 0x6a) 1122 abort (); 1123 1124 temp_code = code = bfd_get_8 (abfd, contents + irel->r_offset - 1); 1125 1126 /* If this is a mov.b instruction, clear the lower 1127 nibble, which contains the source/destination 1128 register number. */ 1129 if ((temp_code & 0x30) != 0x30) 1130 temp_code &= 0xf0; 1131 1132 switch (temp_code) 1133 { 1134 case 0x20: 1135 /* This is mov.b @aa:24/32,Rd. */ 1136 bfd_put_8 (abfd, (code & 0xf) | 0x20, 1137 contents + irel->r_offset - 2); 1138 break; 1139 case 0xa0: 1140 /* This is mov.b Rs,@aa:24/32. */ 1141 bfd_put_8 (abfd, (code & 0xf) | 0x30, 1142 contents + irel->r_offset - 2); 1143 break; 1144 case 0x38: 1145 /* This is a bit-maniputation instruction that 1146 stores one bit into memory, one of "bclr", 1147 "bist", "bnot", "bset", and "bst". */ 1148 bfd_put_8 (abfd, 0x7f, contents + irel->r_offset - 2); 1149 break; 1150 case 0x30: 1151 /* This is a bit-maniputation instruction that 1152 loads one bit from memory, one of "band", 1153 "biand", "bild", "bior", "bixor", "bld", "bor", 1154 "btst", and "bxor". */ 1155 bfd_put_8 (abfd, 0x7e, contents + irel->r_offset - 2); 1156 break; 1157 default: 1158 abort(); 1159 } 1160 1161 /* Fix the relocation's type. */ 1162 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 1163 R_H8_DIR8); 1164 irel->r_offset--; 1165 1166 /* Delete two bytes of data. */ 1167 if (!elf32_h8_relax_delete_bytes (abfd, sec, 1168 irel->r_offset + 1, 4)) 1169 goto error_return; 1170 1171 /* That will change things, so, we should relax again. 1172 Note that this is not required, and it may be slow. */ 1173 *again = TRUE; 1174 break; 1175 } 1176 } 1177 1178 /* Fall through. */ 1179 1180 /* This is a 24-/32-bit absolute address in one of the 1181 following instructions: 1182 1183 "band", "bclr", "biand", "bild", "bior", "bist", 1184 "bixor", "bld", "bnot", "bor", "bset", "bst", "btst", 1185 "bxor", "ldc.w", "stc.w" and "mov.[bwl]" 1186 1187 We may relax this into an 16-bit absolute address if it's 1188 in the right range. */ 1189 case R_H8_DIR32A16: 1190 { 1191 bfd_vma value; 1192 1193 value = bfd_h8300_pad_address (abfd, symval + irel->r_addend); 1194 if (value <= 0x7fff || value >= 0xffff8000u) 1195 { 1196 unsigned char code; 1197 1198 /* Note that we've changed the relocs, section contents, 1199 etc. */ 1200 elf_section_data (sec)->relocs = internal_relocs; 1201 elf_section_data (sec)->this_hdr.contents = contents; 1202 symtab_hdr->contents = (unsigned char *) isymbuf; 1203 1204 /* Get the opcode. */ 1205 code = bfd_get_8 (abfd, contents + irel->r_offset - 1); 1206 1207 /* Fix the opcode. For all the instructions that 1208 belong to this relaxation, we simply need to turn 1209 off bit 0x20 in the previous byte. */ 1210 code &= ~0x20; 1211 1212 bfd_put_8 (abfd, code, contents + irel->r_offset - 1); 1213 1214 /* Fix the relocation's type. */ 1215 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 1216 R_H8_DIR16); 1217 1218 /* Delete two bytes of data. */ 1219 if (!elf32_h8_relax_delete_bytes (abfd, sec, 1220 irel->r_offset + 1, 2)) 1221 goto error_return; 1222 1223 /* That will change things, so, we should relax again. 1224 Note that this is not required, and it may be slow. */ 1225 *again = TRUE; 1226 } 1227 break; 1228 } 1229 1230 default: 1231 break; 1232 } 1233 } 1234 1235 if (isymbuf != NULL 1236 && symtab_hdr->contents != (unsigned char *) isymbuf) 1237 { 1238 if (! link_info->keep_memory) 1239 free (isymbuf); 1240 else 1241 symtab_hdr->contents = (unsigned char *) isymbuf; 1242 } 1243 1244 if (contents != NULL 1245 && elf_section_data (sec)->this_hdr.contents != contents) 1246 { 1247 if (! link_info->keep_memory) 1248 free (contents); 1249 else 1250 { 1251 /* Cache the section contents for elf_link_input_bfd. */ 1252 elf_section_data (sec)->this_hdr.contents = contents; 1253 } 1254 } 1255 1256 if (internal_relocs != NULL 1257 && elf_section_data (sec)->relocs != internal_relocs) 1258 free (internal_relocs); 1259 1260 return TRUE; 1261 1262 error_return: 1263 if (isymbuf != NULL 1264 && symtab_hdr->contents != (unsigned char *) isymbuf) 1265 free (isymbuf); 1266 if (contents != NULL 1267 && elf_section_data (sec)->this_hdr.contents != contents) 1268 free (contents); 1269 if (internal_relocs != NULL 1270 && elf_section_data (sec)->relocs != internal_relocs) 1271 free (internal_relocs); 1272 return FALSE; 1273 } 1274 1275 /* Delete some bytes from a section while relaxing. */ 1276 1277 static bfd_boolean 1278 elf32_h8_relax_delete_bytes (bfd *abfd, asection *sec, bfd_vma addr, int count) 1279 { 1280 Elf_Internal_Shdr *symtab_hdr; 1281 unsigned int sec_shndx; 1282 bfd_byte *contents; 1283 Elf_Internal_Rela *irel, *irelend; 1284 Elf_Internal_Rela *irelalign; 1285 Elf_Internal_Sym *isym; 1286 Elf_Internal_Sym *isymend; 1287 bfd_vma toaddr; 1288 struct elf_link_hash_entry **sym_hashes; 1289 struct elf_link_hash_entry **end_hashes; 1290 unsigned int symcount; 1291 1292 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); 1293 1294 contents = elf_section_data (sec)->this_hdr.contents; 1295 1296 /* The deletion must stop at the next ALIGN reloc for an aligment 1297 power larger than the number of bytes we are deleting. */ 1298 1299 irelalign = NULL; 1300 toaddr = sec->_cooked_size; 1301 1302 irel = elf_section_data (sec)->relocs; 1303 irelend = irel + sec->reloc_count; 1304 1305 /* Actually delete the bytes. */ 1306 memmove (contents + addr, contents + addr + count, 1307 (size_t) (toaddr - addr - count)); 1308 sec->_cooked_size -= count; 1309 1310 /* Adjust all the relocs. */ 1311 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) 1312 { 1313 /* Get the new reloc address. */ 1314 if ((irel->r_offset > addr 1315 && irel->r_offset < toaddr)) 1316 irel->r_offset -= count; 1317 } 1318 1319 /* Adjust the local symbols defined in this section. */ 1320 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1321 isym = (Elf_Internal_Sym *) symtab_hdr->contents; 1322 isymend = isym + symtab_hdr->sh_info; 1323 for (; isym < isymend; isym++) 1324 { 1325 if (isym->st_shndx == sec_shndx 1326 && isym->st_value > addr 1327 && isym->st_value < toaddr) 1328 isym->st_value -= count; 1329 } 1330 1331 /* Now adjust the global symbols defined in this section. */ 1332 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) 1333 - symtab_hdr->sh_info); 1334 sym_hashes = elf_sym_hashes (abfd); 1335 end_hashes = sym_hashes + symcount; 1336 for (; sym_hashes < end_hashes; sym_hashes++) 1337 { 1338 struct elf_link_hash_entry *sym_hash = *sym_hashes; 1339 if ((sym_hash->root.type == bfd_link_hash_defined 1340 || sym_hash->root.type == bfd_link_hash_defweak) 1341 && sym_hash->root.u.def.section == sec 1342 && sym_hash->root.u.def.value > addr 1343 && sym_hash->root.u.def.value < toaddr) 1344 { 1345 sym_hash->root.u.def.value -= count; 1346 } 1347 } 1348 1349 return TRUE; 1350 } 1351 1352 /* Return TRUE if a symbol exists at the given address, else return 1353 FALSE. */ 1354 static bfd_boolean 1355 elf32_h8_symbol_address_p (bfd *abfd, asection *sec, bfd_vma addr) 1356 { 1357 Elf_Internal_Shdr *symtab_hdr; 1358 unsigned int sec_shndx; 1359 Elf_Internal_Sym *isym; 1360 Elf_Internal_Sym *isymend; 1361 struct elf_link_hash_entry **sym_hashes; 1362 struct elf_link_hash_entry **end_hashes; 1363 unsigned int symcount; 1364 1365 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); 1366 1367 /* Examine all the symbols. */ 1368 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1369 isym = (Elf_Internal_Sym *) symtab_hdr->contents; 1370 isymend = isym + symtab_hdr->sh_info; 1371 for (; isym < isymend; isym++) 1372 { 1373 if (isym->st_shndx == sec_shndx 1374 && isym->st_value == addr) 1375 return TRUE; 1376 } 1377 1378 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) 1379 - symtab_hdr->sh_info); 1380 sym_hashes = elf_sym_hashes (abfd); 1381 end_hashes = sym_hashes + symcount; 1382 for (; sym_hashes < end_hashes; sym_hashes++) 1383 { 1384 struct elf_link_hash_entry *sym_hash = *sym_hashes; 1385 if ((sym_hash->root.type == bfd_link_hash_defined 1386 || sym_hash->root.type == bfd_link_hash_defweak) 1387 && sym_hash->root.u.def.section == sec 1388 && sym_hash->root.u.def.value == addr) 1389 return TRUE; 1390 } 1391 1392 return FALSE; 1393 } 1394 1395 /* This is a version of bfd_generic_get_relocated_section_contents 1396 which uses elf32_h8_relocate_section. */ 1397 1398 static bfd_byte * 1399 elf32_h8_get_relocated_section_contents (bfd *output_bfd, 1400 struct bfd_link_info *link_info, 1401 struct bfd_link_order *link_order, 1402 bfd_byte *data, 1403 bfd_boolean relocatable, 1404 asymbol **symbols) 1405 { 1406 Elf_Internal_Shdr *symtab_hdr; 1407 asection *input_section = link_order->u.indirect.section; 1408 bfd *input_bfd = input_section->owner; 1409 asection **sections = NULL; 1410 Elf_Internal_Rela *internal_relocs = NULL; 1411 Elf_Internal_Sym *isymbuf = NULL; 1412 1413 /* We only need to handle the case of relaxing, or of having a 1414 particular set of section contents, specially. */ 1415 if (relocatable 1416 || elf_section_data (input_section)->this_hdr.contents == NULL) 1417 return bfd_generic_get_relocated_section_contents (output_bfd, link_info, 1418 link_order, data, 1419 relocatable, 1420 symbols); 1421 1422 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 1423 1424 memcpy (data, elf_section_data (input_section)->this_hdr.contents, 1425 (size_t) input_section->_raw_size); 1426 1427 if ((input_section->flags & SEC_RELOC) != 0 1428 && input_section->reloc_count > 0) 1429 { 1430 asection **secpp; 1431 Elf_Internal_Sym *isym, *isymend; 1432 bfd_size_type amt; 1433 1434 internal_relocs = (_bfd_elf_link_read_relocs 1435 (input_bfd, input_section, (PTR) NULL, 1436 (Elf_Internal_Rela *) NULL, FALSE)); 1437 if (internal_relocs == NULL) 1438 goto error_return; 1439 1440 if (symtab_hdr->sh_info != 0) 1441 { 1442 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 1443 if (isymbuf == NULL) 1444 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, 1445 symtab_hdr->sh_info, 0, 1446 NULL, NULL, NULL); 1447 if (isymbuf == NULL) 1448 goto error_return; 1449 } 1450 1451 amt = symtab_hdr->sh_info; 1452 amt *= sizeof (asection *); 1453 sections = (asection **) bfd_malloc (amt); 1454 if (sections == NULL && amt != 0) 1455 goto error_return; 1456 1457 isymend = isymbuf + symtab_hdr->sh_info; 1458 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp) 1459 { 1460 asection *isec; 1461 1462 if (isym->st_shndx == SHN_UNDEF) 1463 isec = bfd_und_section_ptr; 1464 else if (isym->st_shndx == SHN_ABS) 1465 isec = bfd_abs_section_ptr; 1466 else if (isym->st_shndx == SHN_COMMON) 1467 isec = bfd_com_section_ptr; 1468 else 1469 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); 1470 1471 *secpp = isec; 1472 } 1473 1474 if (! elf32_h8_relocate_section (output_bfd, link_info, input_bfd, 1475 input_section, data, internal_relocs, 1476 isymbuf, sections)) 1477 goto error_return; 1478 1479 if (sections != NULL) 1480 free (sections); 1481 if (isymbuf != NULL 1482 && symtab_hdr->contents != (unsigned char *) isymbuf) 1483 free (isymbuf); 1484 if (elf_section_data (input_section)->relocs != internal_relocs) 1485 free (internal_relocs); 1486 } 1487 1488 return data; 1489 1490 error_return: 1491 if (sections != NULL) 1492 free (sections); 1493 if (isymbuf != NULL 1494 && symtab_hdr->contents != (unsigned char *) isymbuf) 1495 free (isymbuf); 1496 if (internal_relocs != NULL 1497 && elf_section_data (input_section)->relocs != internal_relocs) 1498 free (internal_relocs); 1499 return NULL; 1500 } 1501 1502 static asection * 1503 elf32_h8_gc_mark_hook (asection *sec, 1504 struct bfd_link_info *info ATTRIBUTE_UNUSED, 1505 Elf_Internal_Rela *rel ATTRIBUTE_UNUSED, 1506 struct elf_link_hash_entry *h, 1507 Elf_Internal_Sym *sym) 1508 { 1509 if (h != NULL) 1510 { 1511 switch (h->root.type) 1512 { 1513 case bfd_link_hash_defined: 1514 case bfd_link_hash_defweak: 1515 return h->root.u.def.section; 1516 1517 case bfd_link_hash_common: 1518 return h->root.u.c.p->section; 1519 1520 default: 1521 break; 1522 } 1523 } 1524 else 1525 return bfd_section_from_elf_index (sec->owner, sym->st_shndx); 1526 return NULL; 1527 } 1528 1529 static bfd_boolean 1530 elf32_h8_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED, 1531 struct bfd_link_info *info ATTRIBUTE_UNUSED, 1532 asection *sec ATTRIBUTE_UNUSED, 1533 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) 1534 { 1535 return TRUE; 1536 } 1537 1538 1539 #define TARGET_BIG_SYM bfd_elf32_h8300_vec 1540 #define TARGET_BIG_NAME "elf32-h8300" 1541 #define ELF_ARCH bfd_arch_h8300 1542 #define ELF_MACHINE_CODE EM_H8_300 1543 #define ELF_MAXPAGESIZE 0x1 1544 #define bfd_elf32_bfd_reloc_type_lookup elf32_h8_reloc_type_lookup 1545 #define elf_info_to_howto elf32_h8_info_to_howto 1546 #define elf_info_to_howto_rel elf32_h8_info_to_howto_rel 1547 1548 /* So we can set/examine bits in e_flags to get the specific 1549 H8 architecture in use. */ 1550 #define elf_backend_final_write_processing \ 1551 elf32_h8_final_write_processing 1552 #define elf_backend_object_p \ 1553 elf32_h8_object_p 1554 #define bfd_elf32_bfd_merge_private_bfd_data \ 1555 elf32_h8_merge_private_bfd_data 1556 #define elf_backend_gc_mark_hook elf32_h8_gc_mark_hook 1557 #define elf_backend_gc_sweep_hook elf32_h8_gc_sweep_hook 1558 1559 /* ??? when elf_backend_relocate_section is not defined, elf32-target.h 1560 defaults to using _bfd_generic_link_hash_table_create, but 1561 bfd_elf_size_dynamic_sections uses 1562 dynobj = elf_hash_table (info)->dynobj; 1563 and thus requires an elf hash table. */ 1564 #define bfd_elf32_bfd_link_hash_table_create _bfd_elf_link_hash_table_create 1565 1566 /* Use an H8 specific linker, not the ELF generic linker. */ 1567 #define elf_backend_relocate_section elf32_h8_relocate_section 1568 #define elf_backend_rela_normal 1 1569 #define elf_backend_can_gc_sections 1 1570 1571 /* And relaxing stuff. */ 1572 #define bfd_elf32_bfd_relax_section elf32_h8_relax_section 1573 #define bfd_elf32_bfd_get_relocated_section_contents \ 1574 elf32_h8_get_relocated_section_contents 1575 1576 1577 #include "elf32-target.h" 1578