1 /* Motorola 68HC12-specific support for 32-bit ELF 2 Copyright (C) 1999-2016 Free Software Foundation, Inc. 3 Contributed by Stephane Carrez (stcarrez (at) nerim.fr) 4 (Heavily copied from the D10V port by Martin Hunt (hunt (at) cygnus.com)) 5 6 This file is part of BFD, the Binary File Descriptor library. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the Free Software 20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 21 MA 02110-1301, USA. */ 22 23 #include "sysdep.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 32 /* Relocation functions. */ 33 static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup 34 (bfd *, bfd_reloc_code_real_type); 35 static void m68hc11_info_to_howto_rel 36 (bfd *, arelent *, Elf_Internal_Rela *); 37 38 /* Trampoline generation. */ 39 40 41 /* Use REL instead of RELA to save space */ 42 #define USE_REL 1 43 44 /* The 68HC12 microcontroler has a memory bank switching system 45 with a 16Kb window in the 64Kb address space. The extended memory 46 is mapped in the 16Kb window (at 0x8000). The page register controls 47 which 16Kb bank is mapped. The call/rtc instructions take care of 48 bank switching in function calls/returns. 49 50 For GNU Binutils to work, we consider there is a physical memory 51 at 0..0x0ffff and a kind of virtual memory above that. Symbols 52 in virtual memory have their addresses treated in a special way 53 when disassembling and when linking. 54 55 For the linker to work properly, we must always relocate the virtual 56 memory as if it is mapped at 0x8000. When a 16-bit relocation is 57 made in the virtual memory, we check that it does not cross the 58 memory bank where it is used. This would involve a page change 59 which would be wrong. The 24-bit relocation is for that and it 60 treats the address as a physical address + page number. 61 62 63 Banked 64 Address Space 65 | | Page n 66 +---------------+ 0x1010000 67 | | 68 | jsr _foo | 69 | .. | Page 3 70 | _foo: | 71 +---------------+ 0x100C000 72 | | 73 | call _bar | 74 | .. | Page 2 75 | _bar: | 76 +---------------+ 0x1008000 77 /------>| | 78 | | call _foo | Page 1 79 | | | 80 | +---------------+ 0x1004000 81 Physical | | | 82 Address Space | | | Page 0 83 | | | 84 +-----------+ 0x00FFFF | +---------------+ 0x1000000 85 | | | 86 | call _foo | | 87 | | | 88 +-----------+ 0x00BFFF -+---/ 89 | | | 90 | | | 91 | | 16K | 92 | | | 93 +-----------+ 0x008000 -+ 94 | | 95 | | 96 = = 97 | | 98 | | 99 +-----------+ 0000 100 101 102 The 'call _foo' must be relocated with page 3 and 16-bit address 103 mapped at 0x8000. 104 105 The 3-bit and 16-bit PC rel relocation is only used by 68HC12. */ 106 static reloc_howto_type elf_m68hc11_howto_table[] = { 107 /* This reloc does nothing. */ 108 HOWTO (R_M68HC11_NONE, /* type */ 109 0, /* rightshift */ 110 3, /* size (0 = byte, 1 = short, 2 = long) */ 111 0, /* bitsize */ 112 FALSE, /* pc_relative */ 113 0, /* bitpos */ 114 complain_overflow_dont,/* complain_on_overflow */ 115 bfd_elf_generic_reloc, /* special_function */ 116 "R_M68HC12_NONE", /* name */ 117 FALSE, /* partial_inplace */ 118 0, /* src_mask */ 119 0, /* dst_mask */ 120 FALSE), /* pcrel_offset */ 121 122 /* A 8 bit absolute relocation */ 123 HOWTO (R_M68HC11_8, /* type */ 124 0, /* rightshift */ 125 0, /* size (0 = byte, 1 = short, 2 = long) */ 126 8, /* bitsize */ 127 FALSE, /* pc_relative */ 128 0, /* bitpos */ 129 complain_overflow_bitfield, /* complain_on_overflow */ 130 bfd_elf_generic_reloc, /* special_function */ 131 "R_M68HC12_8", /* name */ 132 FALSE, /* partial_inplace */ 133 0x00ff, /* src_mask */ 134 0x00ff, /* dst_mask */ 135 FALSE), /* pcrel_offset */ 136 137 /* A 8 bit absolute relocation (upper address) */ 138 HOWTO (R_M68HC11_HI8, /* type */ 139 8, /* rightshift */ 140 0, /* size (0 = byte, 1 = short, 2 = long) */ 141 8, /* bitsize */ 142 FALSE, /* pc_relative */ 143 0, /* bitpos */ 144 complain_overflow_bitfield, /* complain_on_overflow */ 145 bfd_elf_generic_reloc, /* special_function */ 146 "R_M68HC12_HI8", /* name */ 147 FALSE, /* partial_inplace */ 148 0x00ff, /* src_mask */ 149 0x00ff, /* dst_mask */ 150 FALSE), /* pcrel_offset */ 151 152 /* A 8 bit absolute relocation (upper address) */ 153 HOWTO (R_M68HC11_LO8, /* type */ 154 0, /* rightshift */ 155 0, /* size (0 = byte, 1 = short, 2 = long) */ 156 8, /* bitsize */ 157 FALSE, /* pc_relative */ 158 0, /* bitpos */ 159 complain_overflow_dont, /* complain_on_overflow */ 160 bfd_elf_generic_reloc, /* special_function */ 161 "R_M68HC12_LO8", /* name */ 162 FALSE, /* partial_inplace */ 163 0x00ff, /* src_mask */ 164 0x00ff, /* dst_mask */ 165 FALSE), /* pcrel_offset */ 166 167 /* A 8 bit PC-rel relocation */ 168 HOWTO (R_M68HC11_PCREL_8, /* type */ 169 0, /* rightshift */ 170 0, /* size (0 = byte, 1 = short, 2 = long) */ 171 8, /* bitsize */ 172 TRUE, /* pc_relative */ 173 0, /* bitpos */ 174 complain_overflow_bitfield, /* complain_on_overflow */ 175 bfd_elf_generic_reloc, /* special_function */ 176 "R_M68HC12_PCREL_8", /* name */ 177 FALSE, /* partial_inplace */ 178 0x00ff, /* src_mask */ 179 0x00ff, /* dst_mask */ 180 TRUE), /* pcrel_offset */ 181 182 /* A 16 bit absolute relocation */ 183 HOWTO (R_M68HC11_16, /* type */ 184 0, /* rightshift */ 185 1, /* size (0 = byte, 1 = short, 2 = long) */ 186 16, /* bitsize */ 187 FALSE, /* pc_relative */ 188 0, /* bitpos */ 189 complain_overflow_dont /*bitfield */ , /* complain_on_overflow */ 190 bfd_elf_generic_reloc, /* special_function */ 191 "R_M68HC12_16", /* name */ 192 FALSE, /* partial_inplace */ 193 0xffff, /* src_mask */ 194 0xffff, /* dst_mask */ 195 FALSE), /* pcrel_offset */ 196 197 /* A 32 bit absolute relocation. This one is never used for the 198 code relocation. It's used by gas for -gstabs generation. */ 199 HOWTO (R_M68HC11_32, /* type */ 200 0, /* rightshift */ 201 2, /* size (0 = byte, 1 = short, 2 = long) */ 202 32, /* bitsize */ 203 FALSE, /* pc_relative */ 204 0, /* bitpos */ 205 complain_overflow_bitfield, /* complain_on_overflow */ 206 bfd_elf_generic_reloc, /* special_function */ 207 "R_M68HC12_32", /* name */ 208 FALSE, /* partial_inplace */ 209 0xffffffff, /* src_mask */ 210 0xffffffff, /* dst_mask */ 211 FALSE), /* pcrel_offset */ 212 213 /* A 3 bit absolute relocation */ 214 HOWTO (R_M68HC11_3B, /* type */ 215 0, /* rightshift */ 216 0, /* size (0 = byte, 1 = short, 2 = long) */ 217 3, /* bitsize */ 218 FALSE, /* pc_relative */ 219 0, /* bitpos */ 220 complain_overflow_bitfield, /* complain_on_overflow */ 221 bfd_elf_generic_reloc, /* special_function */ 222 "R_M68HC12_4B", /* name */ 223 FALSE, /* partial_inplace */ 224 0x003, /* src_mask */ 225 0x003, /* dst_mask */ 226 FALSE), /* pcrel_offset */ 227 228 /* A 16 bit PC-rel relocation */ 229 HOWTO (R_M68HC11_PCREL_16, /* type */ 230 0, /* rightshift */ 231 1, /* size (0 = byte, 1 = short, 2 = long) */ 232 16, /* bitsize */ 233 TRUE, /* pc_relative */ 234 0, /* bitpos */ 235 complain_overflow_dont, /* complain_on_overflow */ 236 bfd_elf_generic_reloc, /* special_function */ 237 "R_M68HC12_PCREL_16", /* name */ 238 FALSE, /* partial_inplace */ 239 0xffff, /* src_mask */ 240 0xffff, /* dst_mask */ 241 TRUE), /* pcrel_offset */ 242 243 /* GNU extension to record C++ vtable hierarchy */ 244 HOWTO (R_M68HC11_GNU_VTINHERIT, /* type */ 245 0, /* rightshift */ 246 1, /* size (0 = byte, 1 = short, 2 = long) */ 247 0, /* bitsize */ 248 FALSE, /* pc_relative */ 249 0, /* bitpos */ 250 complain_overflow_dont, /* complain_on_overflow */ 251 NULL, /* special_function */ 252 "R_M68HC11_GNU_VTINHERIT", /* name */ 253 FALSE, /* partial_inplace */ 254 0, /* src_mask */ 255 0, /* dst_mask */ 256 FALSE), /* pcrel_offset */ 257 258 /* GNU extension to record C++ vtable member usage */ 259 HOWTO (R_M68HC11_GNU_VTENTRY, /* type */ 260 0, /* rightshift */ 261 1, /* size (0 = byte, 1 = short, 2 = long) */ 262 0, /* bitsize */ 263 FALSE, /* pc_relative */ 264 0, /* bitpos */ 265 complain_overflow_dont, /* complain_on_overflow */ 266 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 267 "R_M68HC11_GNU_VTENTRY", /* name */ 268 FALSE, /* partial_inplace */ 269 0, /* src_mask */ 270 0, /* dst_mask */ 271 FALSE), /* pcrel_offset */ 272 273 /* A 24 bit relocation */ 274 HOWTO (R_M68HC11_24, /* type */ 275 0, /* rightshift */ 276 2, /* size (0 = byte, 1 = short, 2 = long) */ 277 24, /* bitsize */ 278 FALSE, /* pc_relative */ 279 0, /* bitpos */ 280 complain_overflow_dont, /* complain_on_overflow */ 281 m68hc11_elf_special_reloc, /* special_function */ 282 "R_M68HC12_24", /* name */ 283 FALSE, /* partial_inplace */ 284 0xffffff, /* src_mask */ 285 0xffffff, /* dst_mask */ 286 FALSE), /* pcrel_offset */ 287 288 /* A 16-bit low relocation */ 289 HOWTO (R_M68HC11_LO16, /* type */ 290 0, /* rightshift */ 291 1, /* size (0 = byte, 1 = short, 2 = long) */ 292 16, /* bitsize */ 293 FALSE, /* pc_relative */ 294 0, /* bitpos */ 295 complain_overflow_dont, /* complain_on_overflow */ 296 m68hc11_elf_special_reloc,/* special_function */ 297 "R_M68HC12_LO16", /* name */ 298 FALSE, /* partial_inplace */ 299 0xffff, /* src_mask */ 300 0xffff, /* dst_mask */ 301 FALSE), /* pcrel_offset */ 302 303 /* A page relocation */ 304 HOWTO (R_M68HC11_PAGE, /* type */ 305 0, /* rightshift */ 306 0, /* size (0 = byte, 1 = short, 2 = long) */ 307 8, /* bitsize */ 308 FALSE, /* pc_relative */ 309 0, /* bitpos */ 310 complain_overflow_dont, /* complain_on_overflow */ 311 m68hc11_elf_special_reloc,/* special_function */ 312 "R_M68HC12_PAGE", /* name */ 313 FALSE, /* partial_inplace */ 314 0x00ff, /* src_mask */ 315 0x00ff, /* dst_mask */ 316 FALSE), /* pcrel_offset */ 317 318 EMPTY_HOWTO (14), 319 320 /* A 16 bit absolute relocation. */ 321 HOWTO (R_M68HC12_16B, /* type */ 322 0, /* rightshift */ 323 1, /* size (0 = byte, 1 = short, 2 = long) */ 324 16, /* bitsize */ 325 FALSE, /* pc_relative */ 326 0, /* bitpos */ 327 complain_overflow_bitfield, /* complain_on_overflow */ 328 bfd_elf_generic_reloc, /* special_function */ 329 "R_M68HC12_16B", /* name */ 330 FALSE, /* partial_inplace */ 331 0xffff, /* src_mask */ 332 0xffff, /* dst_mask */ 333 FALSE), /* pcrel_offset */ 334 335 /* A 9 bit PC-rel relocation. */ 336 HOWTO (R_M68HC12_PCREL_9, /* type */ 337 1, /* rightshift */ 338 1, /* size (0 = byte, 1 = short, 2 = long) */ 339 10, /* bitsize (result is >>1) */ 340 TRUE, /* pc_relative */ 341 0, /* bitpos */ 342 complain_overflow_dont, /* complain_on_overflow */ 343 bfd_elf_generic_reloc, /* special_function */ 344 "R_M68HC12_PCREL_9", /* name */ 345 TRUE, /* partial_inplace */ 346 0xfe00, /* src_mask */ 347 0x01ff, /* dst_mask */ 348 TRUE), /* pcrel_offset */ 349 350 /* A 10 bit PC-rel relocation. */ 351 HOWTO (R_M68HC12_PCREL_10, /* type */ 352 1, /* rightshift */ 353 1, /* size (0 = byte, 1 = short, 2 = long) */ 354 11, /* bitsize (result is >>1) */ 355 TRUE, /* pc_relative */ 356 0, /* bitpos */ 357 complain_overflow_dont, /* complain_on_overflow */ 358 bfd_elf_generic_reloc, /* special_function */ 359 "R_M68HC12_PCREL_10", /* name */ 360 TRUE, /* partial_inplace */ 361 0xfc00, /* src_mask */ 362 0x03ff, /* dst_mask */ 363 TRUE), /* pcrel_offset */ 364 365 /* A 8 bit absolute relocation (upper address). */ 366 HOWTO (R_M68HC12_HI8XG, /* type */ 367 8, /* rightshift */ 368 0, /* size (0 = byte, 1 = short, 2 = long) */ 369 8, /* bitsize */ 370 FALSE, /* pc_relative */ 371 0, /* bitpos */ 372 complain_overflow_bitfield, /* complain_on_overflow */ 373 bfd_elf_generic_reloc, /* special_function */ 374 "R_M68HC12_HI8XG", /* name */ 375 FALSE, /* partial_inplace */ 376 0x00ff, /* src_mask */ 377 0x00ff, /* dst_mask */ 378 FALSE), /* pcrel_offset */ 379 380 /* A 8 bit absolute relocation (lower address). */ 381 HOWTO (R_M68HC12_LO8XG, /* type */ 382 8, /* rightshift */ 383 0, /* size (0 = byte, 1 = short, 2 = long) */ 384 8, /* bitsize */ 385 FALSE, /* pc_relative */ 386 0, /* bitpos */ 387 complain_overflow_bitfield, /* complain_on_overflow */ 388 bfd_elf_generic_reloc, /* special_function */ 389 "R_M68HC12_LO8XG", /* name */ 390 FALSE, /* partial_inplace */ 391 0x00ff, /* src_mask */ 392 0x00ff, /* dst_mask */ 393 FALSE), /* pcrel_offset */ 394 395 /* Mark beginning of a jump instruction (any form). */ 396 HOWTO (R_M68HC11_RL_JUMP, /* type */ 397 0, /* rightshift */ 398 1, /* size (0 = byte, 1 = short, 2 = long) */ 399 0, /* bitsize */ 400 FALSE, /* pc_relative */ 401 0, /* bitpos */ 402 complain_overflow_dont, /* complain_on_overflow */ 403 m68hc11_elf_ignore_reloc, /* special_function */ 404 "R_M68HC12_RL_JUMP", /* name */ 405 TRUE, /* partial_inplace */ 406 0, /* src_mask */ 407 0, /* dst_mask */ 408 TRUE), /* pcrel_offset */ 409 410 /* Mark beginning of Gcc relaxation group instruction. */ 411 HOWTO (R_M68HC11_RL_GROUP, /* type */ 412 0, /* rightshift */ 413 1, /* size (0 = byte, 1 = short, 2 = long) */ 414 0, /* bitsize */ 415 FALSE, /* pc_relative */ 416 0, /* bitpos */ 417 complain_overflow_dont, /* complain_on_overflow */ 418 m68hc11_elf_ignore_reloc, /* special_function */ 419 "R_M68HC12_RL_GROUP", /* name */ 420 TRUE, /* partial_inplace */ 421 0, /* src_mask */ 422 0, /* dst_mask */ 423 TRUE), /* pcrel_offset */ 424 }; 425 426 /* Map BFD reloc types to M68HC11 ELF reloc types. */ 427 428 struct m68hc11_reloc_map 429 { 430 bfd_reloc_code_real_type bfd_reloc_val; 431 unsigned char elf_reloc_val; 432 }; 433 434 static const struct m68hc11_reloc_map m68hc11_reloc_map[] = 435 { 436 {BFD_RELOC_NONE, R_M68HC11_NONE,}, 437 {BFD_RELOC_8, R_M68HC11_8}, 438 {BFD_RELOC_M68HC11_HI8, R_M68HC11_HI8}, 439 {BFD_RELOC_M68HC11_LO8, R_M68HC11_LO8}, 440 {BFD_RELOC_8_PCREL, R_M68HC11_PCREL_8}, 441 {BFD_RELOC_16_PCREL, R_M68HC11_PCREL_16}, 442 {BFD_RELOC_16, R_M68HC11_16}, 443 {BFD_RELOC_32, R_M68HC11_32}, 444 {BFD_RELOC_M68HC11_3B, R_M68HC11_3B}, 445 446 {BFD_RELOC_VTABLE_INHERIT, R_M68HC11_GNU_VTINHERIT}, 447 {BFD_RELOC_VTABLE_ENTRY, R_M68HC11_GNU_VTENTRY}, 448 449 {BFD_RELOC_M68HC11_LO16, R_M68HC11_LO16}, 450 {BFD_RELOC_M68HC11_PAGE, R_M68HC11_PAGE}, 451 {BFD_RELOC_M68HC11_24, R_M68HC11_24}, 452 453 {BFD_RELOC_M68HC11_RL_JUMP, R_M68HC11_RL_JUMP}, 454 {BFD_RELOC_M68HC11_RL_GROUP, R_M68HC11_RL_GROUP}, 455 456 {BFD_RELOC_M68HC12_16B, R_M68HC12_16B}, 457 458 {BFD_RELOC_M68HC12_9_PCREL, R_M68HC12_PCREL_9}, 459 {BFD_RELOC_M68HC12_10_PCREL, R_M68HC12_PCREL_10}, 460 {BFD_RELOC_M68HC12_HI8XG, R_M68HC12_HI8XG}, 461 {BFD_RELOC_M68HC12_LO8XG, R_M68HC12_LO8XG}, 462 }; 463 464 static reloc_howto_type * 465 bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 466 bfd_reloc_code_real_type code) 467 { 468 unsigned int i; 469 470 for (i = 0; 471 i < sizeof (m68hc11_reloc_map) / sizeof (struct m68hc11_reloc_map); 472 i++) 473 { 474 if (m68hc11_reloc_map[i].bfd_reloc_val == code) 475 return &elf_m68hc11_howto_table[m68hc11_reloc_map[i].elf_reloc_val]; 476 } 477 478 return NULL; 479 } 480 481 static reloc_howto_type * 482 bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 483 const char *r_name) 484 { 485 unsigned int i; 486 487 for (i = 0; 488 i < (sizeof (elf_m68hc11_howto_table) 489 / sizeof (elf_m68hc11_howto_table[0])); 490 i++) 491 if (elf_m68hc11_howto_table[i].name != NULL 492 && strcasecmp (elf_m68hc11_howto_table[i].name, r_name) == 0) 493 return &elf_m68hc11_howto_table[i]; 494 495 return NULL; 496 } 497 498 /* Set the howto pointer for an M68HC11 ELF reloc. */ 499 500 static void 501 m68hc11_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, 502 arelent *cache_ptr, Elf_Internal_Rela *dst) 503 { 504 unsigned int r_type; 505 506 r_type = ELF32_R_TYPE (dst->r_info); 507 if (r_type >= (unsigned int) R_M68HC11_max) 508 { 509 _bfd_error_handler (_("%B: invalid M68HC12 reloc number: %d"), abfd, r_type); 510 r_type = 0; 511 } 512 cache_ptr->howto = &elf_m68hc11_howto_table[r_type]; 513 } 514 515 516 /* Far trampoline generation. */ 518 519 /* Build a 68HC12 trampoline stub. */ 520 static bfd_boolean 521 m68hc12_elf_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) 522 { 523 struct elf32_m68hc11_stub_hash_entry *stub_entry; 524 struct bfd_link_info *info; 525 struct m68hc11_elf_link_hash_table *htab; 526 asection *stub_sec; 527 bfd *stub_bfd; 528 bfd_byte *loc; 529 bfd_vma sym_value, phys_page, phys_addr; 530 531 /* Massage our args to the form they really have. */ 532 stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry; 533 info = (struct bfd_link_info *) in_arg; 534 535 htab = m68hc11_elf_hash_table (info); 536 537 stub_sec = stub_entry->stub_sec; 538 539 /* Make a note of the offset within the stubs for this entry. */ 540 stub_entry->stub_offset = stub_sec->size; 541 stub_sec->size += 7; 542 loc = stub_sec->contents + stub_entry->stub_offset; 543 544 stub_bfd = stub_sec->owner; 545 546 /* Create the trampoline call stub: 547 548 ldy #%addr(symbol) 549 call %page(symbol), __trampoline 550 551 */ 552 sym_value = (stub_entry->target_value 553 + stub_entry->target_section->output_offset 554 + stub_entry->target_section->output_section->vma); 555 phys_addr = m68hc11_phys_addr (&htab->pinfo, sym_value); 556 phys_page = m68hc11_phys_page (&htab->pinfo, sym_value); 557 558 /* ldy #%page(sym) */ 559 bfd_put_8 (stub_bfd, 0xCD, loc); 560 bfd_put_16 (stub_bfd, phys_addr, loc + 1); 561 loc += 3; 562 563 /* call %page(sym), __trampoline */ 564 bfd_put_8 (stub_bfd, 0x4a, loc); 565 bfd_put_16 (stub_bfd, htab->pinfo.trampoline_addr, loc + 1); 566 bfd_put_8 (stub_bfd, phys_page, loc + 3); 567 568 return TRUE; 569 } 570 571 /* As above, but don't actually build the stub. Just bump offset so 572 we know stub section sizes. */ 573 574 static bfd_boolean 575 m68hc12_elf_size_one_stub (struct bfd_hash_entry *gen_entry, 576 void *in_arg ATTRIBUTE_UNUSED) 577 { 578 struct elf32_m68hc11_stub_hash_entry *stub_entry; 579 580 /* Massage our args to the form they really have. */ 581 stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry; 582 583 stub_entry->stub_sec->size += 7; 584 return TRUE; 585 } 586 587 /* Create a 68HC12 ELF linker hash table. */ 588 589 static struct bfd_link_hash_table * 590 m68hc12_elf_bfd_link_hash_table_create (bfd *abfd) 591 { 592 struct m68hc11_elf_link_hash_table *ret; 593 594 ret = m68hc11_elf_hash_table_create (abfd); 595 if (ret == (struct m68hc11_elf_link_hash_table *) NULL) 596 return NULL; 597 598 ret->size_one_stub = m68hc12_elf_size_one_stub; 599 ret->build_one_stub = m68hc12_elf_build_one_stub; 600 601 return &ret->root.root; 602 } 603 604 static bfd_boolean 606 m68hc12_elf_set_mach_from_flags (bfd *abfd) 607 { 608 flagword flags = elf_elfheader (abfd)->e_flags; 609 610 switch (flags & EF_M68HC11_MACH_MASK) 611 { 612 case EF_M68HC12_MACH: 613 bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12, bfd_mach_m6812); 614 break; 615 case EF_M68HCS12_MACH: 616 bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12, bfd_mach_m6812s); 617 break; 618 case EF_M68HC11_GENERIC: 619 bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12, 620 bfd_mach_m6812_default); 621 break; 622 default: 623 return FALSE; 624 } 625 return TRUE; 626 } 627 628 /* Specific sections: 629 - The .page0 is a data section that is mapped in [0x0000..0x00FF]. 630 Page0 accesses are faster on the M68HC12. 631 - The .vectors is the section that represents the interrupt 632 vectors. */ 633 static const struct bfd_elf_special_section elf32_m68hc12_special_sections[] = 634 { 635 { STRING_COMMA_LEN (".eeprom"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 636 { STRING_COMMA_LEN (".page0"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 637 { STRING_COMMA_LEN (".softregs"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 638 { STRING_COMMA_LEN (".vectors"), 0, SHT_PROGBITS, SHF_ALLOC }, 639 { NULL, 0, 0, 0, 0 } 640 }; 641 642 #define ELF_ARCH bfd_arch_m68hc12 644 #define ELF_TARGET_ID M68HC11_ELF_DATA 645 #define ELF_MACHINE_CODE EM_68HC12 646 #define ELF_MAXPAGESIZE 0x1000 647 648 #define TARGET_BIG_SYM m68hc12_elf32_vec 649 #define TARGET_BIG_NAME "elf32-m68hc12" 650 651 #define elf_info_to_howto 0 652 #define elf_info_to_howto_rel m68hc11_info_to_howto_rel 653 #define elf_backend_check_relocs elf32_m68hc11_check_relocs 654 #define elf_backend_relocate_section elf32_m68hc11_relocate_section 655 #define elf_backend_object_p m68hc12_elf_set_mach_from_flags 656 #define elf_backend_final_write_processing 0 657 #define elf_backend_can_gc_sections 1 658 #define elf_backend_special_sections elf32_m68hc12_special_sections 659 #define elf_backend_post_process_headers elf32_m68hc11_post_process_headers 660 #define elf_backend_add_symbol_hook elf32_m68hc11_add_symbol_hook 661 #define elf_backend_merge_symbol_attribute elf32_m68hc11_merge_symbol_attribute 662 663 #define bfd_elf32_bfd_link_hash_table_create \ 664 m68hc12_elf_bfd_link_hash_table_create 665 #define bfd_elf32_bfd_merge_private_bfd_data \ 666 _bfd_m68hc11_elf_merge_private_bfd_data 667 #define bfd_elf32_bfd_set_private_flags _bfd_m68hc11_elf_set_private_flags 668 #define bfd_elf32_bfd_print_private_bfd_data \ 669 _bfd_m68hc11_elf_print_private_bfd_data 670 671 #include "elf32-target.h" 672
