1/* Motorola 68HC11/HC12-specific support for 32-bit ELF 2 Copyright (C) 1999-2017 Free Software Foundation, Inc. 3 Contributed by Stephane Carrez (stcarrez@nerim.fr) 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 20 MA 02110-1301, USA. */ 21 22#include "sysdep.h" 23#include "alloca-conf.h" 24#include "bfd.h" 25#include "bfdlink.h" 26#include "libbfd.h" 27#include "elf-bfd.h" 28#include "elf32-m68hc1x.h" 29#include "elf/m68hc11.h" 30#include "opcode/m68hc11.h" 31#include "libiberty.h" 32 33#define m68hc12_stub_hash_lookup(table, string, create, copy) \ 34 ((struct elf32_m68hc11_stub_hash_entry *) \ 35 bfd_hash_lookup ((table), (string), (create), (copy))) 36 37static struct elf32_m68hc11_stub_hash_entry* m68hc12_add_stub 38 (const char *stub_name, 39 asection *section, 40 struct m68hc11_elf_link_hash_table *htab); 41 42static struct bfd_hash_entry *stub_hash_newfunc 43 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); 44 45static void m68hc11_elf_set_symbol (bfd* abfd, struct bfd_link_info *info, 46 const char* name, bfd_vma value, 47 asection* sec); 48 49static bfd_boolean m68hc11_elf_export_one_stub 50 (struct bfd_hash_entry *gen_entry, void *in_arg); 51 52static void scan_sections_for_abi (bfd*, asection*, void *); 53 54struct m68hc11_scan_param 55{ 56 struct m68hc11_page_info* pinfo; 57 bfd_boolean use_memory_banks; 58}; 59 60 61/* Destroy a 68HC11/68HC12 ELF linker hash table. */ 62 63static void 64m68hc11_elf_bfd_link_hash_table_free (bfd *obfd) 65{ 66 struct m68hc11_elf_link_hash_table *ret 67 = (struct m68hc11_elf_link_hash_table *) obfd->link.hash; 68 69 bfd_hash_table_free (ret->stub_hash_table); 70 free (ret->stub_hash_table); 71 _bfd_elf_link_hash_table_free (obfd); 72} 73 74/* Create a 68HC11/68HC12 ELF linker hash table. */ 75 76struct m68hc11_elf_link_hash_table* 77m68hc11_elf_hash_table_create (bfd *abfd) 78{ 79 struct m68hc11_elf_link_hash_table *ret; 80 bfd_size_type amt = sizeof (struct m68hc11_elf_link_hash_table); 81 82 ret = (struct m68hc11_elf_link_hash_table *) bfd_zmalloc (amt); 83 if (ret == (struct m68hc11_elf_link_hash_table *) NULL) 84 return NULL; 85 86 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, 87 _bfd_elf_link_hash_newfunc, 88 sizeof (struct elf_link_hash_entry), 89 M68HC11_ELF_DATA)) 90 { 91 free (ret); 92 return NULL; 93 } 94 95 /* Init the stub hash table too. */ 96 amt = sizeof (struct bfd_hash_table); 97 ret->stub_hash_table = (struct bfd_hash_table*) bfd_malloc (amt); 98 if (ret->stub_hash_table == NULL) 99 { 100 _bfd_elf_link_hash_table_free (abfd); 101 return NULL; 102 } 103 if (!bfd_hash_table_init (ret->stub_hash_table, stub_hash_newfunc, 104 sizeof (struct elf32_m68hc11_stub_hash_entry))) 105 { 106 free (ret->stub_hash_table); 107 _bfd_elf_link_hash_table_free (abfd); 108 return NULL; 109 } 110 ret->root.root.hash_table_free = m68hc11_elf_bfd_link_hash_table_free; 111 112 return ret; 113} 114 115/* Assorted hash table functions. */ 116 117/* Initialize an entry in the stub hash table. */ 118 119static struct bfd_hash_entry * 120stub_hash_newfunc (struct bfd_hash_entry *entry, struct bfd_hash_table *table, 121 const char *string) 122{ 123 /* Allocate the structure if it has not already been allocated by a 124 subclass. */ 125 if (entry == NULL) 126 { 127 entry = bfd_hash_allocate (table, 128 sizeof (struct elf32_m68hc11_stub_hash_entry)); 129 if (entry == NULL) 130 return entry; 131 } 132 133 /* Call the allocation method of the superclass. */ 134 entry = bfd_hash_newfunc (entry, table, string); 135 if (entry != NULL) 136 { 137 struct elf32_m68hc11_stub_hash_entry *eh; 138 139 /* Initialize the local fields. */ 140 eh = (struct elf32_m68hc11_stub_hash_entry *) entry; 141 eh->stub_sec = NULL; 142 eh->stub_offset = 0; 143 eh->target_value = 0; 144 eh->target_section = NULL; 145 } 146 147 return entry; 148} 149 150/* Add a new stub entry to the stub hash. Not all fields of the new 151 stub entry are initialised. */ 152 153static struct elf32_m68hc11_stub_hash_entry * 154m68hc12_add_stub (const char *stub_name, asection *section, 155 struct m68hc11_elf_link_hash_table *htab) 156{ 157 struct elf32_m68hc11_stub_hash_entry *stub_entry; 158 159 /* Enter this entry into the linker stub hash table. */ 160 stub_entry = m68hc12_stub_hash_lookup (htab->stub_hash_table, stub_name, 161 TRUE, FALSE); 162 if (stub_entry == NULL) 163 { 164 /* xgettext:c-format */ 165 _bfd_error_handler (_("%B: cannot create stub entry %s"), 166 section->owner, stub_name); 167 return NULL; 168 } 169 170 if (htab->stub_section == 0) 171 { 172 htab->stub_section = (*htab->add_stub_section) (".tramp", 173 htab->tramp_section); 174 } 175 176 stub_entry->stub_sec = htab->stub_section; 177 stub_entry->stub_offset = 0; 178 return stub_entry; 179} 180 181/* Hook called by the linker routine which adds symbols from an object 182 file. We use it for identify far symbols and force a loading of 183 the trampoline handler. */ 184 185bfd_boolean 186elf32_m68hc11_add_symbol_hook (bfd *abfd, struct bfd_link_info *info, 187 Elf_Internal_Sym *sym, 188 const char **namep ATTRIBUTE_UNUSED, 189 flagword *flagsp ATTRIBUTE_UNUSED, 190 asection **secp ATTRIBUTE_UNUSED, 191 bfd_vma *valp ATTRIBUTE_UNUSED) 192{ 193 if (sym->st_other & STO_M68HC12_FAR) 194 { 195 struct elf_link_hash_entry *h; 196 197 h = (struct elf_link_hash_entry *) 198 bfd_link_hash_lookup (info->hash, "__far_trampoline", 199 FALSE, FALSE, FALSE); 200 if (h == NULL) 201 { 202 struct bfd_link_hash_entry* entry = NULL; 203 204 _bfd_generic_link_add_one_symbol (info, abfd, 205 "__far_trampoline", 206 BSF_GLOBAL, 207 bfd_und_section_ptr, 208 (bfd_vma) 0, (const char*) NULL, 209 FALSE, FALSE, &entry); 210 } 211 212 } 213 return TRUE; 214} 215 216/* Merge non-visibility st_other attributes, STO_M68HC12_FAR and 217 STO_M68HC12_INTERRUPT. */ 218 219void 220elf32_m68hc11_merge_symbol_attribute (struct elf_link_hash_entry *h, 221 const Elf_Internal_Sym *isym, 222 bfd_boolean definition, 223 bfd_boolean dynamic ATTRIBUTE_UNUSED) 224{ 225 if (definition) 226 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1)) 227 | ELF_ST_VISIBILITY (h->other)); 228} 229 230/* External entry points for sizing and building linker stubs. */ 231 232/* Set up various things so that we can make a list of input sections 233 for each output section included in the link. Returns -1 on error, 234 0 when no stubs will be needed, and 1 on success. */ 235 236int 237elf32_m68hc11_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info) 238{ 239 bfd *input_bfd; 240 unsigned int bfd_count; 241 unsigned int top_id, top_index; 242 asection *section; 243 asection **input_list, **list; 244 bfd_size_type amt; 245 asection *text_section; 246 struct m68hc11_elf_link_hash_table *htab; 247 248 htab = m68hc11_elf_hash_table (info); 249 if (htab == NULL) 250 return -1; 251 252 if (bfd_get_flavour (info->output_bfd) != bfd_target_elf_flavour) 253 return 0; 254 255 /* Count the number of input BFDs and find the top input section id. 256 Also search for an existing ".tramp" section so that we know 257 where generated trampolines must go. Default to ".text" if we 258 can't find it. */ 259 htab->tramp_section = 0; 260 text_section = 0; 261 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; 262 input_bfd != NULL; 263 input_bfd = input_bfd->link.next) 264 { 265 bfd_count += 1; 266 for (section = input_bfd->sections; 267 section != NULL; 268 section = section->next) 269 { 270 const char* name = bfd_get_section_name (input_bfd, section); 271 272 if (!strcmp (name, ".tramp")) 273 htab->tramp_section = section; 274 275 if (!strcmp (name, ".text")) 276 text_section = section; 277 278 if (top_id < section->id) 279 top_id = section->id; 280 } 281 } 282 htab->bfd_count = bfd_count; 283 if (htab->tramp_section == 0) 284 htab->tramp_section = text_section; 285 286 /* We can't use output_bfd->section_count here to find the top output 287 section index as some sections may have been removed, and 288 strip_excluded_output_sections doesn't renumber the indices. */ 289 for (section = output_bfd->sections, top_index = 0; 290 section != NULL; 291 section = section->next) 292 { 293 if (top_index < section->index) 294 top_index = section->index; 295 } 296 297 htab->top_index = top_index; 298 amt = sizeof (asection *) * (top_index + 1); 299 input_list = (asection **) bfd_malloc (amt); 300 htab->input_list = input_list; 301 if (input_list == NULL) 302 return -1; 303 304 /* For sections we aren't interested in, mark their entries with a 305 value we can check later. */ 306 list = input_list + top_index; 307 do 308 *list = bfd_abs_section_ptr; 309 while (list-- != input_list); 310 311 for (section = output_bfd->sections; 312 section != NULL; 313 section = section->next) 314 { 315 if ((section->flags & SEC_CODE) != 0) 316 input_list[section->index] = NULL; 317 } 318 319 return 1; 320} 321 322/* Determine and set the size of the stub section for a final link. 323 324 The basic idea here is to examine all the relocations looking for 325 PC-relative calls to a target that is unreachable with a "bl" 326 instruction. */ 327 328bfd_boolean 329elf32_m68hc11_size_stubs (bfd *output_bfd, bfd *stub_bfd, 330 struct bfd_link_info *info, 331 asection * (*add_stub_section) (const char*, asection*)) 332{ 333 bfd *input_bfd; 334 asection *section; 335 Elf_Internal_Sym *local_syms, **all_local_syms; 336 unsigned int bfd_indx, bfd_count; 337 bfd_size_type amt; 338 asection *stub_sec; 339 struct m68hc11_elf_link_hash_table *htab = m68hc11_elf_hash_table (info); 340 341 if (htab == NULL) 342 return FALSE; 343 344 /* Stash our params away. */ 345 htab->stub_bfd = stub_bfd; 346 htab->add_stub_section = add_stub_section; 347 348 /* Count the number of input BFDs and find the top input section id. */ 349 for (input_bfd = info->input_bfds, bfd_count = 0; 350 input_bfd != NULL; 351 input_bfd = input_bfd->link.next) 352 bfd_count += 1; 353 354 /* We want to read in symbol extension records only once. To do this 355 we need to read in the local symbols in parallel and save them for 356 later use; so hold pointers to the local symbols in an array. */ 357 amt = sizeof (Elf_Internal_Sym *) * bfd_count; 358 all_local_syms = (Elf_Internal_Sym **) bfd_zmalloc (amt); 359 if (all_local_syms == NULL) 360 return FALSE; 361 362 /* Walk over all the input BFDs, swapping in local symbols. */ 363 for (input_bfd = info->input_bfds, bfd_indx = 0; 364 input_bfd != NULL; 365 input_bfd = input_bfd->link.next, bfd_indx++) 366 { 367 Elf_Internal_Shdr *symtab_hdr; 368 369 /* We'll need the symbol table in a second. */ 370 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 371 if (symtab_hdr->sh_info == 0) 372 continue; 373 374 /* We need an array of the local symbols attached to the input bfd. */ 375 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; 376 if (local_syms == NULL) 377 { 378 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, 379 symtab_hdr->sh_info, 0, 380 NULL, NULL, NULL); 381 /* Cache them for elf_link_input_bfd. */ 382 symtab_hdr->contents = (unsigned char *) local_syms; 383 } 384 if (local_syms == NULL) 385 { 386 free (all_local_syms); 387 return FALSE; 388 } 389 390 all_local_syms[bfd_indx] = local_syms; 391 } 392 393 for (input_bfd = info->input_bfds, bfd_indx = 0; 394 input_bfd != NULL; 395 input_bfd = input_bfd->link.next, bfd_indx++) 396 { 397 Elf_Internal_Shdr *symtab_hdr; 398 struct elf_link_hash_entry ** sym_hashes; 399 400 sym_hashes = elf_sym_hashes (input_bfd); 401 402 /* We'll need the symbol table in a second. */ 403 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 404 if (symtab_hdr->sh_info == 0) 405 continue; 406 407 local_syms = all_local_syms[bfd_indx]; 408 409 /* Walk over each section attached to the input bfd. */ 410 for (section = input_bfd->sections; 411 section != NULL; 412 section = section->next) 413 { 414 Elf_Internal_Rela *internal_relocs, *irelaend, *irela; 415 416 /* If there aren't any relocs, then there's nothing more 417 to do. */ 418 if ((section->flags & SEC_RELOC) == 0 419 || section->reloc_count == 0) 420 continue; 421 422 /* If this section is a link-once section that will be 423 discarded, then don't create any stubs. */ 424 if (section->output_section == NULL 425 || section->output_section->owner != output_bfd) 426 continue; 427 428 /* Get the relocs. */ 429 internal_relocs 430 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, 431 (Elf_Internal_Rela *) NULL, 432 info->keep_memory); 433 if (internal_relocs == NULL) 434 goto error_ret_free_local; 435 436 /* Now examine each relocation. */ 437 irela = internal_relocs; 438 irelaend = irela + section->reloc_count; 439 for (; irela < irelaend; irela++) 440 { 441 unsigned int r_type, r_indx; 442 struct elf32_m68hc11_stub_hash_entry *stub_entry; 443 asection *sym_sec; 444 bfd_vma sym_value; 445 struct elf_link_hash_entry *hash; 446 const char *stub_name; 447 Elf_Internal_Sym *sym; 448 449 r_type = ELF32_R_TYPE (irela->r_info); 450 451 /* Only look at 16-bit relocs. */ 452 if (r_type != (unsigned int) R_M68HC11_16) 453 continue; 454 455 /* Now determine the call target, its name, value, 456 section. */ 457 r_indx = ELF32_R_SYM (irela->r_info); 458 if (r_indx < symtab_hdr->sh_info) 459 { 460 /* It's a local symbol. */ 461 Elf_Internal_Shdr *hdr; 462 bfd_boolean is_far; 463 464 sym = local_syms + r_indx; 465 is_far = (sym && (sym->st_other & STO_M68HC12_FAR)); 466 if (!is_far) 467 continue; 468 469 if (sym->st_shndx >= elf_numsections (input_bfd)) 470 sym_sec = NULL; 471 else 472 { 473 hdr = elf_elfsections (input_bfd)[sym->st_shndx]; 474 sym_sec = hdr->bfd_section; 475 } 476 stub_name = (bfd_elf_string_from_elf_section 477 (input_bfd, symtab_hdr->sh_link, 478 sym->st_name)); 479 sym_value = sym->st_value; 480 hash = NULL; 481 } 482 else 483 { 484 /* It's an external symbol. */ 485 int e_indx; 486 487 e_indx = r_indx - symtab_hdr->sh_info; 488 hash = (struct elf_link_hash_entry *) 489 (sym_hashes[e_indx]); 490 491 while (hash->root.type == bfd_link_hash_indirect 492 || hash->root.type == bfd_link_hash_warning) 493 hash = ((struct elf_link_hash_entry *) 494 hash->root.u.i.link); 495 496 if (hash->root.type == bfd_link_hash_defined 497 || hash->root.type == bfd_link_hash_defweak 498 || hash->root.type == bfd_link_hash_new) 499 { 500 if (!(hash->other & STO_M68HC12_FAR)) 501 continue; 502 } 503 else if (hash->root.type == bfd_link_hash_undefweak) 504 { 505 continue; 506 } 507 else if (hash->root.type == bfd_link_hash_undefined) 508 { 509 continue; 510 } 511 else 512 { 513 bfd_set_error (bfd_error_bad_value); 514 goto error_ret_free_internal; 515 } 516 sym_sec = hash->root.u.def.section; 517 sym_value = hash->root.u.def.value; 518 stub_name = hash->root.root.string; 519 } 520 521 if (!stub_name) 522 goto error_ret_free_internal; 523 524 stub_entry = m68hc12_stub_hash_lookup 525 (htab->stub_hash_table, 526 stub_name, 527 FALSE, FALSE); 528 if (stub_entry == NULL) 529 { 530 if (add_stub_section == 0) 531 continue; 532 533 stub_entry = m68hc12_add_stub (stub_name, section, htab); 534 if (stub_entry == NULL) 535 { 536 error_ret_free_internal: 537 if (elf_section_data (section)->relocs == NULL) 538 free (internal_relocs); 539 goto error_ret_free_local; 540 } 541 } 542 543 stub_entry->target_value = sym_value; 544 stub_entry->target_section = sym_sec; 545 } 546 547 /* We're done with the internal relocs, free them. */ 548 if (elf_section_data (section)->relocs == NULL) 549 free (internal_relocs); 550 } 551 } 552 553 if (add_stub_section) 554 { 555 /* OK, we've added some stubs. Find out the new size of the 556 stub sections. */ 557 for (stub_sec = htab->stub_bfd->sections; 558 stub_sec != NULL; 559 stub_sec = stub_sec->next) 560 { 561 stub_sec->size = 0; 562 } 563 564 bfd_hash_traverse (htab->stub_hash_table, htab->size_one_stub, htab); 565 } 566 free (all_local_syms); 567 return TRUE; 568 569 error_ret_free_local: 570 free (all_local_syms); 571 return FALSE; 572} 573 574/* Export the trampoline addresses in the symbol table. */ 575static bfd_boolean 576m68hc11_elf_export_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) 577{ 578 struct bfd_link_info *info; 579 struct m68hc11_elf_link_hash_table *htab; 580 struct elf32_m68hc11_stub_hash_entry *stub_entry; 581 char* name; 582 bfd_boolean result; 583 584 info = (struct bfd_link_info *) in_arg; 585 htab = m68hc11_elf_hash_table (info); 586 if (htab == NULL) 587 return FALSE; 588 589 /* Massage our args to the form they really have. */ 590 stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry; 591 592 /* Generate the trampoline according to HC11 or HC12. */ 593 result = (* htab->build_one_stub) (gen_entry, in_arg); 594 595 /* Make a printable name that does not conflict with the real function. */ 596 name = concat ("tramp.", stub_entry->root.string, NULL); 597 598 /* Export the symbol for debugging/disassembling. */ 599 m68hc11_elf_set_symbol (htab->stub_bfd, info, name, 600 stub_entry->stub_offset, 601 stub_entry->stub_sec); 602 free (name); 603 return result; 604} 605 606/* Export a symbol or set its value and section. */ 607static void 608m68hc11_elf_set_symbol (bfd *abfd, struct bfd_link_info *info, 609 const char *name, bfd_vma value, asection *sec) 610{ 611 struct elf_link_hash_entry *h; 612 613 h = (struct elf_link_hash_entry *) 614 bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, FALSE); 615 if (h == NULL) 616 { 617 _bfd_generic_link_add_one_symbol (info, abfd, 618 name, 619 BSF_GLOBAL, 620 sec, 621 value, 622 (const char*) NULL, 623 TRUE, FALSE, NULL); 624 } 625 else 626 { 627 h->root.type = bfd_link_hash_defined; 628 h->root.u.def.value = value; 629 h->root.u.def.section = sec; 630 } 631} 632 633 634/* Build all the stubs associated with the current output file. The 635 stubs are kept in a hash table attached to the main linker hash 636 table. This function is called via m68hc12elf_finish in the 637 linker. */ 638 639bfd_boolean 640elf32_m68hc11_build_stubs (bfd *abfd, struct bfd_link_info *info) 641{ 642 asection *stub_sec; 643 struct bfd_hash_table *table; 644 struct m68hc11_elf_link_hash_table *htab; 645 struct m68hc11_scan_param param; 646 647 m68hc11_elf_get_bank_parameters (info); 648 htab = m68hc11_elf_hash_table (info); 649 if (htab == NULL) 650 return FALSE; 651 652 for (stub_sec = htab->stub_bfd->sections; 653 stub_sec != NULL; 654 stub_sec = stub_sec->next) 655 { 656 bfd_size_type size; 657 658 /* Allocate memory to hold the linker stubs. */ 659 size = stub_sec->size; 660 stub_sec->contents = (unsigned char *) bfd_zalloc (htab->stub_bfd, size); 661 if (stub_sec->contents == NULL && size != 0) 662 return FALSE; 663 stub_sec->size = 0; 664 } 665 666 /* Build the stubs as directed by the stub hash table. */ 667 table = htab->stub_hash_table; 668 bfd_hash_traverse (table, m68hc11_elf_export_one_stub, info); 669 670 /* Scan the output sections to see if we use the memory banks. 671 If so, export the symbols that define how the memory banks 672 are mapped. This is used by gdb and the simulator to obtain 673 the information. It can be used by programs to burn the eprom 674 at the good addresses. */ 675 param.use_memory_banks = FALSE; 676 param.pinfo = &htab->pinfo; 677 bfd_map_over_sections (abfd, scan_sections_for_abi, ¶m); 678 if (param.use_memory_banks) 679 { 680 m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_START_NAME, 681 htab->pinfo.bank_physical, 682 bfd_abs_section_ptr); 683 m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_VIRTUAL_NAME, 684 htab->pinfo.bank_virtual, 685 bfd_abs_section_ptr); 686 m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_SIZE_NAME, 687 htab->pinfo.bank_size, 688 bfd_abs_section_ptr); 689 } 690 691 return TRUE; 692} 693 694void 695m68hc11_elf_get_bank_parameters (struct bfd_link_info *info) 696{ 697 unsigned i; 698 struct m68hc11_page_info *pinfo; 699 struct bfd_link_hash_entry *h; 700 struct m68hc11_elf_link_hash_table *htab; 701 702 htab = m68hc11_elf_hash_table (info); 703 if (htab == NULL) 704 return; 705 706 pinfo = & htab->pinfo; 707 if (pinfo->bank_param_initialized) 708 return; 709 710 pinfo->bank_virtual = M68HC12_BANK_VIRT; 711 pinfo->bank_mask = M68HC12_BANK_MASK; 712 pinfo->bank_physical = M68HC12_BANK_BASE; 713 pinfo->bank_shift = M68HC12_BANK_SHIFT; 714 pinfo->bank_size = 1 << M68HC12_BANK_SHIFT; 715 716 h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_START_NAME, 717 FALSE, FALSE, TRUE); 718 if (h != (struct bfd_link_hash_entry*) NULL 719 && h->type == bfd_link_hash_defined) 720 pinfo->bank_physical = (h->u.def.value 721 + h->u.def.section->output_section->vma 722 + h->u.def.section->output_offset); 723 724 h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_VIRTUAL_NAME, 725 FALSE, FALSE, TRUE); 726 if (h != (struct bfd_link_hash_entry*) NULL 727 && h->type == bfd_link_hash_defined) 728 pinfo->bank_virtual = (h->u.def.value 729 + h->u.def.section->output_section->vma 730 + h->u.def.section->output_offset); 731 732 h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_SIZE_NAME, 733 FALSE, FALSE, TRUE); 734 if (h != (struct bfd_link_hash_entry*) NULL 735 && h->type == bfd_link_hash_defined) 736 pinfo->bank_size = (h->u.def.value 737 + h->u.def.section->output_section->vma 738 + h->u.def.section->output_offset); 739 740 pinfo->bank_shift = 0; 741 for (i = pinfo->bank_size; i != 0; i >>= 1) 742 pinfo->bank_shift++; 743 pinfo->bank_shift--; 744 pinfo->bank_mask = (1 << pinfo->bank_shift) - 1; 745 pinfo->bank_physical_end = pinfo->bank_physical + pinfo->bank_size; 746 pinfo->bank_param_initialized = 1; 747 748 h = bfd_link_hash_lookup (info->hash, "__far_trampoline", FALSE, 749 FALSE, TRUE); 750 if (h != (struct bfd_link_hash_entry*) NULL 751 && h->type == bfd_link_hash_defined) 752 pinfo->trampoline_addr = (h->u.def.value 753 + h->u.def.section->output_section->vma 754 + h->u.def.section->output_offset); 755} 756 757/* Return 1 if the address is in banked memory. 758 This can be applied to a virtual address and to a physical address. */ 759int 760m68hc11_addr_is_banked (struct m68hc11_page_info *pinfo, bfd_vma addr) 761{ 762 if (addr >= pinfo->bank_virtual) 763 return 1; 764 765 if (addr >= pinfo->bank_physical && addr <= pinfo->bank_physical_end) 766 return 1; 767 768 return 0; 769} 770 771/* Return the physical address seen by the processor, taking 772 into account banked memory. */ 773bfd_vma 774m68hc11_phys_addr (struct m68hc11_page_info *pinfo, bfd_vma addr) 775{ 776 if (addr < pinfo->bank_virtual) 777 return addr; 778 779 /* Map the address to the memory bank. */ 780 addr -= pinfo->bank_virtual; 781 addr &= pinfo->bank_mask; 782 addr += pinfo->bank_physical; 783 return addr; 784} 785 786/* Return the page number corresponding to an address in banked memory. */ 787bfd_vma 788m68hc11_phys_page (struct m68hc11_page_info *pinfo, bfd_vma addr) 789{ 790 if (addr < pinfo->bank_virtual) 791 return 0; 792 793 /* Map the address to the memory bank. */ 794 addr -= pinfo->bank_virtual; 795 addr >>= pinfo->bank_shift; 796 addr &= 0x0ff; 797 return addr; 798} 799 800/* This function is used for relocs which are only used for relaxing, 801 which the linker should otherwise ignore. */ 802 803bfd_reloc_status_type 804m68hc11_elf_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, 805 arelent *reloc_entry, 806 asymbol *symbol ATTRIBUTE_UNUSED, 807 void *data ATTRIBUTE_UNUSED, 808 asection *input_section, 809 bfd *output_bfd, 810 char **error_message ATTRIBUTE_UNUSED) 811{ 812 if (output_bfd != NULL) 813 reloc_entry->address += input_section->output_offset; 814 return bfd_reloc_ok; 815} 816 817bfd_reloc_status_type 818m68hc11_elf_special_reloc (bfd *abfd ATTRIBUTE_UNUSED, 819 arelent *reloc_entry, 820 asymbol *symbol, 821 void *data ATTRIBUTE_UNUSED, 822 asection *input_section, 823 bfd *output_bfd, 824 char **error_message ATTRIBUTE_UNUSED) 825{ 826 if (output_bfd != (bfd *) NULL 827 && (symbol->flags & BSF_SECTION_SYM) == 0 828 && (! reloc_entry->howto->partial_inplace 829 || reloc_entry->addend == 0)) 830 { 831 reloc_entry->address += input_section->output_offset; 832 return bfd_reloc_ok; 833 } 834 835 if (output_bfd != NULL) 836 return bfd_reloc_continue; 837 838 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 839 return bfd_reloc_outofrange; 840 841 abort(); 842} 843 844/* Look through the relocs for a section during the first phase. 845 Since we don't do .gots or .plts, we just need to consider the 846 virtual table relocs for gc. */ 847 848bfd_boolean 849elf32_m68hc11_check_relocs (bfd *abfd, struct bfd_link_info *info, 850 asection *sec, const Elf_Internal_Rela *relocs) 851{ 852 Elf_Internal_Shdr * symtab_hdr; 853 struct elf_link_hash_entry ** sym_hashes; 854 const Elf_Internal_Rela * rel; 855 const Elf_Internal_Rela * rel_end; 856 857 if (bfd_link_relocatable (info)) 858 return TRUE; 859 860 symtab_hdr = & elf_tdata (abfd)->symtab_hdr; 861 sym_hashes = elf_sym_hashes (abfd); 862 rel_end = relocs + sec->reloc_count; 863 864 for (rel = relocs; rel < rel_end; rel++) 865 { 866 struct elf_link_hash_entry * h; 867 unsigned long r_symndx; 868 869 r_symndx = ELF32_R_SYM (rel->r_info); 870 871 if (r_symndx < symtab_hdr->sh_info) 872 h = NULL; 873 else 874 { 875 h = sym_hashes [r_symndx - symtab_hdr->sh_info]; 876 while (h->root.type == bfd_link_hash_indirect 877 || h->root.type == bfd_link_hash_warning) 878 h = (struct elf_link_hash_entry *) h->root.u.i.link; 879 880 /* PR15323, ref flags aren't set for references in the same 881 object. */ 882 h->root.non_ir_ref = 1; 883 } 884 885 switch (ELF32_R_TYPE (rel->r_info)) 886 { 887 /* This relocation describes the C++ object vtable hierarchy. 888 Reconstruct it for later use during GC. */ 889 case R_M68HC11_GNU_VTINHERIT: 890 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 891 return FALSE; 892 break; 893 894 /* This relocation describes which C++ vtable entries are actually 895 used. Record for later use during GC. */ 896 case R_M68HC11_GNU_VTENTRY: 897 BFD_ASSERT (h != NULL); 898 if (h != NULL 899 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 900 return FALSE; 901 break; 902 } 903 } 904 905 return TRUE; 906} 907 908/* Relocate a 68hc11/68hc12 ELF section. */ 909bfd_boolean 910elf32_m68hc11_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, 911 struct bfd_link_info *info, 912 bfd *input_bfd, asection *input_section, 913 bfd_byte *contents, Elf_Internal_Rela *relocs, 914 Elf_Internal_Sym *local_syms, 915 asection **local_sections) 916{ 917 Elf_Internal_Shdr *symtab_hdr; 918 struct elf_link_hash_entry **sym_hashes; 919 Elf_Internal_Rela *rel, *relend; 920 const char *name = NULL; 921 struct m68hc11_page_info *pinfo; 922 const struct elf_backend_data * const ebd = get_elf_backend_data (input_bfd); 923 struct m68hc11_elf_link_hash_table *htab; 924 unsigned long e_flags; 925 926 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 927 sym_hashes = elf_sym_hashes (input_bfd); 928 e_flags = elf_elfheader (input_bfd)->e_flags; 929 930 htab = m68hc11_elf_hash_table (info); 931 if (htab == NULL) 932 return FALSE; 933 934 /* Get memory bank parameters. */ 935 m68hc11_elf_get_bank_parameters (info); 936 937 pinfo = & htab->pinfo; 938 rel = relocs; 939 relend = relocs + input_section->reloc_count; 940 941 for (; rel < relend; rel++) 942 { 943 int r_type; 944 arelent arel; 945 reloc_howto_type *howto; 946 unsigned long r_symndx; 947 Elf_Internal_Sym *sym; 948 asection *sec; 949 bfd_vma relocation = 0; 950 bfd_reloc_status_type r = bfd_reloc_undefined; 951 bfd_vma phys_page; 952 bfd_vma phys_addr; 953 bfd_vma insn_addr; 954 bfd_vma insn_page; 955 bfd_boolean is_far = FALSE; 956 bfd_boolean is_xgate_symbol = FALSE; 957 bfd_boolean is_section_symbol = FALSE; 958 struct elf_link_hash_entry *h; 959 bfd_vma val; 960 const char * msg; 961 char * buf; 962 963 r_symndx = ELF32_R_SYM (rel->r_info); 964 r_type = ELF32_R_TYPE (rel->r_info); 965 966 if (r_type == R_M68HC11_GNU_VTENTRY 967 || r_type == R_M68HC11_GNU_VTINHERIT) 968 continue; 969 970 (*ebd->elf_info_to_howto_rel) (input_bfd, &arel, rel); 971 howto = arel.howto; 972 973 h = NULL; 974 sym = NULL; 975 sec = NULL; 976 if (r_symndx < symtab_hdr->sh_info) 977 { 978 sym = local_syms + r_symndx; 979 sec = local_sections[r_symndx]; 980 relocation = (sec->output_section->vma 981 + sec->output_offset 982 + sym->st_value); 983 is_far = (sym && (sym->st_other & STO_M68HC12_FAR)); 984 is_xgate_symbol = (sym && (sym->st_target_internal)); 985 is_section_symbol = ELF_ST_TYPE (sym->st_info) & STT_SECTION; 986 } 987 else 988 { 989 bfd_boolean unresolved_reloc, warned, ignored; 990 991 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 992 r_symndx, symtab_hdr, sym_hashes, 993 h, sec, relocation, unresolved_reloc, 994 warned, ignored); 995 996 is_far = (h && (h->other & STO_M68HC12_FAR)); 997 is_xgate_symbol = (h && (h->target_internal)); 998 } 999 1000 if (sec != NULL && discarded_section (sec)) 1001 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 1002 rel, 1, relend, howto, 0, contents); 1003 1004 if (bfd_link_relocatable (info)) 1005 { 1006 /* This is a relocatable link. We don't have to change 1007 anything, unless the reloc is against a section symbol, 1008 in which case we have to adjust according to where the 1009 section symbol winds up in the output section. */ 1010 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) 1011 rel->r_addend += sec->output_offset; 1012 continue; 1013 } 1014 1015 if (h != NULL) 1016 name = h->root.root.string; 1017 else 1018 { 1019 name = (bfd_elf_string_from_elf_section 1020 (input_bfd, symtab_hdr->sh_link, sym->st_name)); 1021 if (name == NULL || *name == '\0') 1022 name = bfd_section_name (input_bfd, sec); 1023 } 1024 1025 if (is_far && ELF32_R_TYPE (rel->r_info) == R_M68HC11_16) 1026 { 1027 struct elf32_m68hc11_stub_hash_entry* stub; 1028 1029 stub = m68hc12_stub_hash_lookup (htab->stub_hash_table, 1030 name, FALSE, FALSE); 1031 if (stub) 1032 { 1033 relocation = stub->stub_offset 1034 + stub->stub_sec->output_section->vma 1035 + stub->stub_sec->output_offset; 1036 is_far = FALSE; 1037 } 1038 } 1039 1040 /* Do the memory bank mapping. */ 1041 phys_addr = m68hc11_phys_addr (pinfo, relocation + rel->r_addend); 1042 phys_page = m68hc11_phys_page (pinfo, relocation + rel->r_addend); 1043 switch (r_type) 1044 { 1045 case R_M68HC12_LO8XG: 1046 /* This relocation is specific to XGATE IMM16 calls and will precede 1047 a HI8. tc-m68hc11 only generates them in pairs. 1048 Leave the relocation to the HI8XG step. */ 1049 r = bfd_reloc_ok; 1050 r_type = R_M68HC11_NONE; 1051 break; 1052 1053 case R_M68HC12_HI8XG: 1054 /* This relocation is specific to XGATE IMM16 calls and must follow 1055 a LO8XG. Does not actually check that it was a LO8XG. 1056 Adjusts high and low bytes. */ 1057 relocation = phys_addr; 1058 if ((e_flags & E_M68HC11_XGATE_RAMOFFSET) 1059 && (relocation >= 0x2000)) 1060 relocation += 0xc000; /* HARDCODED RAM offset for XGATE. */ 1061 1062 /* Fetch 16 bit value including low byte in previous insn. */ 1063 val = (bfd_get_8 (input_bfd, (bfd_byte*) contents + rel->r_offset) << 8) 1064 | bfd_get_8 (input_bfd, (bfd_byte*) contents + rel->r_offset - 2); 1065 1066 /* Add on value to preserve carry, then write zero to high byte. */ 1067 relocation += val; 1068 1069 /* Write out top byte. */ 1070 bfd_put_8 (input_bfd, (relocation >> 8) & 0xff, 1071 (bfd_byte*) contents + rel->r_offset); 1072 1073 /* Write out low byte to previous instruction. */ 1074 bfd_put_8 (input_bfd, relocation & 0xff, 1075 (bfd_byte*) contents + rel->r_offset - 2); 1076 1077 /* Mark as relocation completed. */ 1078 r = bfd_reloc_ok; 1079 r_type = R_M68HC11_NONE; 1080 break; 1081 1082 /* The HI8 and LO8 relocs are generated by %hi(expr) %lo(expr) 1083 assembler directives. %hi does not support carry. */ 1084 case R_M68HC11_HI8: 1085 case R_M68HC11_LO8: 1086 relocation = phys_addr; 1087 break; 1088 1089 case R_M68HC11_24: 1090 /* Reloc used by 68HC12 call instruction. */ 1091 bfd_put_16 (input_bfd, phys_addr, 1092 (bfd_byte*) contents + rel->r_offset); 1093 bfd_put_8 (input_bfd, phys_page, 1094 (bfd_byte*) contents + rel->r_offset + 2); 1095 r = bfd_reloc_ok; 1096 r_type = R_M68HC11_NONE; 1097 break; 1098 1099 case R_M68HC11_NONE: 1100 r = bfd_reloc_ok; 1101 break; 1102 1103 case R_M68HC11_LO16: 1104 /* Reloc generated by %addr(expr) gas to obtain the 1105 address as mapped in the memory bank window. */ 1106 relocation = phys_addr; 1107 break; 1108 1109 case R_M68HC11_PAGE: 1110 /* Reloc generated by %page(expr) gas to obtain the 1111 page number associated with the address. */ 1112 relocation = phys_page; 1113 break; 1114 1115 case R_M68HC11_16: 1116 /* Get virtual address of instruction having the relocation. */ 1117 if (is_far) 1118 { 1119 msg = _("Reference to the far symbol `%s' using a wrong " 1120 "relocation may result in incorrect execution"); 1121 buf = xmalloc (strlen (msg) + strlen (name) + 10); 1122 sprintf (buf, msg, name); 1123 1124 (*info->callbacks->warning) 1125 (info, buf, name, input_bfd, NULL, rel->r_offset); 1126 free (buf); 1127 } 1128 1129 /* Get virtual address of instruction having the relocation. */ 1130 insn_addr = input_section->output_section->vma 1131 + input_section->output_offset 1132 + rel->r_offset; 1133 1134 insn_page = m68hc11_phys_page (pinfo, insn_addr); 1135 1136 /* If we are linking an S12 instruction against an XGATE symbol, we 1137 need to change the offset of the symbol value so that it's correct 1138 from the S12's perspective. */ 1139 if (is_xgate_symbol) 1140 { 1141 /* The ram in the global space is mapped to 0x2000 in the 16-bit 1142 address space for S12 and 0xE000 in the 16-bit address space 1143 for XGATE. */ 1144 if (relocation >= 0xE000) 1145 { 1146 /* We offset the address by the difference 1147 between these two mappings. */ 1148 relocation -= 0xC000; 1149 break; 1150 } 1151 else 1152 { 1153 msg = _("XGATE address (%lx) is not within shared RAM" 1154 "(0xE000-0xFFFF), therefore you must manually offset " 1155 "the address, and possibly manage the page, in your " 1156 "code."); 1157 buf = xmalloc (strlen (msg) + 128); 1158 sprintf (buf, msg, phys_addr); 1159 (*info->callbacks->warning) (info, buf, name, input_bfd, 1160 input_section, insn_addr); 1161 free (buf); 1162 break; 1163 } 1164 } 1165 1166 if (m68hc11_addr_is_banked (pinfo, relocation + rel->r_addend) 1167 && m68hc11_addr_is_banked (pinfo, insn_addr) 1168 && phys_page != insn_page && !(e_flags & E_M68HC11_NO_BANK_WARNING)) 1169 { 1170 /* xgettext:c-format */ 1171 msg = _("banked address [%lx:%04lx] (%lx) is not in the same bank " 1172 "as current banked address [%lx:%04lx] (%lx)"); 1173 buf = xmalloc (strlen (msg) + 128); 1174 sprintf (buf, msg, phys_page, phys_addr, 1175 (long) (relocation + rel->r_addend), 1176 insn_page, m68hc11_phys_addr (pinfo, insn_addr), 1177 (long) (insn_addr)); 1178 (*info->callbacks->warning) (info, buf, name, input_bfd, 1179 input_section, rel->r_offset); 1180 free (buf); 1181 break; 1182 } 1183 1184 if (phys_page != 0 && insn_page == 0) 1185 { 1186 /* xgettext:c-format */ 1187 msg = _("reference to a banked address [%lx:%04lx] in the " 1188 "normal address space at %04lx"); 1189 buf = xmalloc (strlen (msg) + 128); 1190 sprintf (buf, msg, phys_page, phys_addr, insn_addr); 1191 (*info->callbacks->warning) (info, buf, name, input_bfd, 1192 input_section, insn_addr); 1193 free (buf); 1194 relocation = phys_addr; 1195 break; 1196 } 1197 1198 /* If this is a banked address use the phys_addr so that 1199 we stay in the banked window. */ 1200 if (m68hc11_addr_is_banked (pinfo, relocation + rel->r_addend)) 1201 relocation = phys_addr; 1202 break; 1203 } 1204 1205 /* If we are linking an XGATE instruction against an S12 symbol, we 1206 need to change the offset of the symbol value so that it's correct 1207 from the XGATE's perspective. */ 1208 if (!strcmp (howto->name, "R_XGATE_IMM8_LO") 1209 || !strcmp (howto->name, "R_XGATE_IMM8_HI")) 1210 { 1211 /* We can only offset S12 addresses that lie within the non-paged 1212 area of RAM. */ 1213 if (!is_xgate_symbol && !is_section_symbol) 1214 { 1215 /* The ram in the global space is mapped to 0x2000 and stops at 1216 0x4000 in the 16-bit address space for S12 and 0xE000 in the 1217 16-bit address space for XGATE. */ 1218 if (relocation >= 0x2000 && relocation < 0x4000) 1219 /* We offset the address by the difference 1220 between these two mappings. */ 1221 relocation += 0xC000; 1222 else 1223 { 1224 /* Get virtual address of instruction having the relocation. */ 1225 insn_addr = input_section->output_section->vma 1226 + input_section->output_offset + rel->r_offset; 1227 1228 msg = _("S12 address (%lx) is not within shared RAM" 1229 "(0x2000-0x4000), therefore you must manually " 1230 "offset the address in your code"); 1231 buf = xmalloc (strlen (msg) + 128); 1232 sprintf (buf, msg, phys_addr); 1233 (*info->callbacks->warning) (info, buf, name, input_bfd, 1234 input_section, insn_addr); 1235 free (buf); 1236 break; 1237 } 1238 } 1239 } 1240 1241 if (r_type != R_M68HC11_NONE) 1242 { 1243 if ((r_type == R_M68HC12_PCREL_9) || (r_type == R_M68HC12_PCREL_10)) 1244 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 1245 contents, rel->r_offset, 1246 relocation - 2, rel->r_addend); 1247 else 1248 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 1249 contents, rel->r_offset, 1250 relocation, rel->r_addend); 1251 } 1252 1253 if (r != bfd_reloc_ok) 1254 { 1255 switch (r) 1256 { 1257 case bfd_reloc_overflow: 1258 (*info->callbacks->reloc_overflow) 1259 (info, NULL, name, howto->name, (bfd_vma) 0, 1260 input_bfd, input_section, rel->r_offset); 1261 break; 1262 1263 case bfd_reloc_undefined: 1264 (*info->callbacks->undefined_symbol) 1265 (info, name, input_bfd, input_section, rel->r_offset, TRUE); 1266 break; 1267 1268 case bfd_reloc_outofrange: 1269 msg = _ ("internal error: out of range error"); 1270 goto common_error; 1271 1272 case bfd_reloc_notsupported: 1273 msg = _ ("internal error: unsupported relocation error"); 1274 goto common_error; 1275 1276 case bfd_reloc_dangerous: 1277 msg = _ ("internal error: dangerous error"); 1278 goto common_error; 1279 1280 default: 1281 msg = _ ("internal error: unknown error"); 1282 /* fall through */ 1283 1284 common_error: 1285 (*info->callbacks->warning) (info, msg, name, input_bfd, 1286 input_section, rel->r_offset); 1287 break; 1288 } 1289 } 1290 } 1291 1292 return TRUE; 1293} 1294 1295 1296 1297/* Set and control ELF flags in ELF header. */ 1298 1299bfd_boolean 1300_bfd_m68hc11_elf_set_private_flags (bfd *abfd, flagword flags) 1301{ 1302 BFD_ASSERT (!elf_flags_init (abfd) 1303 || elf_elfheader (abfd)->e_flags == flags); 1304 1305 elf_elfheader (abfd)->e_flags = flags; 1306 elf_flags_init (abfd) = TRUE; 1307 return TRUE; 1308} 1309 1310/* Merge backend specific data from an object file to the output 1311 object file when linking. */ 1312 1313bfd_boolean 1314_bfd_m68hc11_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 1315{ 1316 bfd *obfd = info->output_bfd; 1317 flagword old_flags; 1318 flagword new_flags; 1319 bfd_boolean ok = TRUE; 1320 1321 /* Check if we have the same endianness */ 1322 if (!_bfd_generic_verify_endian_match (ibfd, info)) 1323 return FALSE; 1324 1325 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 1326 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 1327 return TRUE; 1328 1329 new_flags = elf_elfheader (ibfd)->e_flags; 1330 elf_elfheader (obfd)->e_flags |= new_flags & EF_M68HC11_ABI; 1331 old_flags = elf_elfheader (obfd)->e_flags; 1332 1333 if (! elf_flags_init (obfd)) 1334 { 1335 elf_flags_init (obfd) = TRUE; 1336 elf_elfheader (obfd)->e_flags = new_flags; 1337 elf_elfheader (obfd)->e_ident[EI_CLASS] 1338 = elf_elfheader (ibfd)->e_ident[EI_CLASS]; 1339 1340 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) 1341 && bfd_get_arch_info (obfd)->the_default) 1342 { 1343 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), 1344 bfd_get_mach (ibfd))) 1345 return FALSE; 1346 } 1347 1348 return TRUE; 1349 } 1350 1351 /* Check ABI compatibility. */ 1352 if ((new_flags & E_M68HC11_I32) != (old_flags & E_M68HC11_I32)) 1353 { 1354 _bfd_error_handler 1355 (_("%B: linking files compiled for 16-bit integers (-mshort) " 1356 "and others for 32-bit integers"), ibfd); 1357 ok = FALSE; 1358 } 1359 if ((new_flags & E_M68HC11_F64) != (old_flags & E_M68HC11_F64)) 1360 { 1361 _bfd_error_handler 1362 (_("%B: linking files compiled for 32-bit double (-fshort-double) " 1363 "and others for 64-bit double"), ibfd); 1364 ok = FALSE; 1365 } 1366 1367 /* Processor compatibility. */ 1368 if (!EF_M68HC11_CAN_MERGE_MACH (new_flags, old_flags)) 1369 { 1370 _bfd_error_handler 1371 (_("%B: linking files compiled for HCS12 with " 1372 "others compiled for HC12"), ibfd); 1373 ok = FALSE; 1374 } 1375 new_flags = ((new_flags & ~EF_M68HC11_MACH_MASK) 1376 | (EF_M68HC11_MERGE_MACH (new_flags, old_flags))); 1377 1378 elf_elfheader (obfd)->e_flags = new_flags; 1379 1380 new_flags &= ~(EF_M68HC11_ABI | EF_M68HC11_MACH_MASK); 1381 old_flags &= ~(EF_M68HC11_ABI | EF_M68HC11_MACH_MASK); 1382 1383 /* Warn about any other mismatches */ 1384 if (new_flags != old_flags) 1385 { 1386 _bfd_error_handler 1387 /* xgettext:c-format */ 1388 (_("%B: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), 1389 ibfd, (unsigned long) new_flags, (unsigned long) old_flags); 1390 ok = FALSE; 1391 } 1392 1393 if (! ok) 1394 { 1395 bfd_set_error (bfd_error_bad_value); 1396 return FALSE; 1397 } 1398 1399 return TRUE; 1400} 1401 1402bfd_boolean 1403_bfd_m68hc11_elf_print_private_bfd_data (bfd *abfd, void *ptr) 1404{ 1405 FILE *file = (FILE *) ptr; 1406 1407 BFD_ASSERT (abfd != NULL && ptr != NULL); 1408 1409 /* Print normal ELF private data. */ 1410 _bfd_elf_print_private_bfd_data (abfd, ptr); 1411 1412 /* xgettext:c-format */ 1413 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); 1414 1415 if (elf_elfheader (abfd)->e_flags & E_M68HC11_I32) 1416 fprintf (file, _("[abi=32-bit int, ")); 1417 else 1418 fprintf (file, _("[abi=16-bit int, ")); 1419 1420 if (elf_elfheader (abfd)->e_flags & E_M68HC11_F64) 1421 fprintf (file, _("64-bit double, ")); 1422 else 1423 fprintf (file, _("32-bit double, ")); 1424 1425 if (strcmp (bfd_get_target (abfd), "elf32-m68hc11") == 0) 1426 fprintf (file, _("cpu=HC11]")); 1427 else if (elf_elfheader (abfd)->e_flags & EF_M68HCS12_MACH) 1428 fprintf (file, _("cpu=HCS12]")); 1429 else 1430 fprintf (file, _("cpu=HC12]")); 1431 1432 if (elf_elfheader (abfd)->e_flags & E_M68HC12_BANKS) 1433 fprintf (file, _(" [memory=bank-model]")); 1434 else 1435 fprintf (file, _(" [memory=flat]")); 1436 1437 if (elf_elfheader (abfd)->e_flags & E_M68HC11_XGATE_RAMOFFSET) 1438 fprintf (file, _(" [XGATE RAM offsetting]")); 1439 1440 fputc ('\n', file); 1441 1442 return TRUE; 1443} 1444 1445static void scan_sections_for_abi (bfd *abfd ATTRIBUTE_UNUSED, 1446 asection *asect, void *arg) 1447{ 1448 struct m68hc11_scan_param* p = (struct m68hc11_scan_param*) arg; 1449 1450 if (asect->vma >= p->pinfo->bank_virtual) 1451 p->use_memory_banks = TRUE; 1452} 1453 1454/* Tweak the OSABI field of the elf header. */ 1455 1456void 1457elf32_m68hc11_post_process_headers (bfd *abfd, struct bfd_link_info *link_info) 1458{ 1459 struct m68hc11_scan_param param; 1460 struct m68hc11_elf_link_hash_table *htab; 1461 1462 if (link_info == NULL) 1463 return; 1464 1465 htab = m68hc11_elf_hash_table (link_info); 1466 if (htab == NULL) 1467 return; 1468 1469 m68hc11_elf_get_bank_parameters (link_info); 1470 1471 param.use_memory_banks = FALSE; 1472 param.pinfo = & htab->pinfo; 1473 1474 bfd_map_over_sections (abfd, scan_sections_for_abi, ¶m); 1475 1476 if (param.use_memory_banks) 1477 { 1478 Elf_Internal_Ehdr * i_ehdrp; 1479 1480 i_ehdrp = elf_elfheader (abfd); 1481 i_ehdrp->e_flags |= E_M68HC12_BANKS; 1482 } 1483} 1484