1/* Motorola 68HC11-specific support for 32-bit ELF 2 Copyright (C) 1999-2017 Free Software Foundation, Inc. 3 Contributed by Stephane Carrez (stcarrez@nerim.fr) 4 (Heavily copied from the D10V port by Martin Hunt (hunt@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. */ 33static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup 34 (bfd *, bfd_reloc_code_real_type); 35static void m68hc11_info_to_howto_rel 36 (bfd *, arelent *, Elf_Internal_Rela *); 37 38/* Trampoline generation. */ 39static bfd_boolean m68hc11_elf_size_one_stub 40 (struct bfd_hash_entry *gen_entry, void *in_arg); 41static bfd_boolean m68hc11_elf_build_one_stub 42 (struct bfd_hash_entry *gen_entry, void *in_arg); 43static struct bfd_link_hash_table* m68hc11_elf_bfd_link_hash_table_create 44 (bfd* abfd); 45 46/* Linker relaxation. */ 47static bfd_boolean m68hc11_elf_relax_section 48 (bfd *, asection *, struct bfd_link_info *, bfd_boolean *); 49static void m68hc11_elf_relax_delete_bytes 50 (bfd *, asection *, bfd_vma, int); 51static void m68hc11_relax_group 52 (bfd *, asection *, bfd_byte *, unsigned, unsigned long, unsigned long); 53static int compare_reloc (const void *, const void *); 54 55/* Use REL instead of RELA to save space */ 56#define USE_REL 1 57 58/* The Motorola 68HC11 microcontroller only addresses 64Kb but we also 59 support a memory bank switching mechanism similar to 68HC12. 60 We must handle 8 and 16-bit relocations. The 32-bit relocation 61 are used for debugging sections (DWARF2) to represent a virtual 62 address. 63 The 3-bit and 16-bit PC rel relocation is only used by 68HC12. */ 64static reloc_howto_type elf_m68hc11_howto_table[] = { 65 /* This reloc does nothing. */ 66 HOWTO (R_M68HC11_NONE, /* type */ 67 0, /* rightshift */ 68 3, /* 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 bfd_elf_generic_reloc, /* special_function */ 74 "R_M68HC11_NONE", /* name */ 75 FALSE, /* partial_inplace */ 76 0, /* src_mask */ 77 0, /* dst_mask */ 78 FALSE), /* pcrel_offset */ 79 80 /* A 8 bit absolute relocation */ 81 HOWTO (R_M68HC11_8, /* type */ 82 0, /* rightshift */ 83 0, /* size (0 = byte, 1 = short, 2 = long) */ 84 8, /* bitsize */ 85 FALSE, /* pc_relative */ 86 0, /* bitpos */ 87 complain_overflow_bitfield, /* complain_on_overflow */ 88 bfd_elf_generic_reloc, /* special_function */ 89 "R_M68HC11_8", /* name */ 90 FALSE, /* partial_inplace */ 91 0x00ff, /* src_mask */ 92 0x00ff, /* dst_mask */ 93 FALSE), /* pcrel_offset */ 94 95 /* A 8 bit absolute relocation (upper address) */ 96 HOWTO (R_M68HC11_HI8, /* type */ 97 8, /* rightshift */ 98 0, /* size (0 = byte, 1 = short, 2 = long) */ 99 8, /* bitsize */ 100 FALSE, /* pc_relative */ 101 0, /* bitpos */ 102 complain_overflow_bitfield, /* complain_on_overflow */ 103 bfd_elf_generic_reloc, /* special_function */ 104 "R_M68HC11_HI8", /* name */ 105 FALSE, /* partial_inplace */ 106 0x00ff, /* src_mask */ 107 0x00ff, /* dst_mask */ 108 FALSE), /* pcrel_offset */ 109 110 /* A 8 bit absolute relocation (upper address) */ 111 HOWTO (R_M68HC11_LO8, /* type */ 112 0, /* rightshift */ 113 0, /* size (0 = byte, 1 = short, 2 = long) */ 114 8, /* bitsize */ 115 FALSE, /* pc_relative */ 116 0, /* bitpos */ 117 complain_overflow_dont, /* complain_on_overflow */ 118 bfd_elf_generic_reloc, /* special_function */ 119 "R_M68HC11_LO8", /* name */ 120 FALSE, /* partial_inplace */ 121 0x00ff, /* src_mask */ 122 0x00ff, /* dst_mask */ 123 FALSE), /* pcrel_offset */ 124 125 /* A 8 bit PC-rel relocation */ 126 HOWTO (R_M68HC11_PCREL_8, /* type */ 127 0, /* rightshift */ 128 0, /* size (0 = byte, 1 = short, 2 = long) */ 129 8, /* bitsize */ 130 TRUE, /* pc_relative */ 131 0, /* bitpos */ 132 complain_overflow_bitfield, /* complain_on_overflow */ 133 bfd_elf_generic_reloc, /* special_function */ 134 "R_M68HC11_PCREL_8", /* name */ 135 FALSE, /* partial_inplace */ 136 0x00ff, /* src_mask */ 137 0x00ff, /* dst_mask */ 138 TRUE), /* pcrel_offset */ 139 140 /* A 16 bit absolute relocation */ 141 HOWTO (R_M68HC11_16, /* type */ 142 0, /* rightshift */ 143 1, /* size (0 = byte, 1 = short, 2 = long) */ 144 16, /* bitsize */ 145 FALSE, /* pc_relative */ 146 0, /* bitpos */ 147 complain_overflow_dont /*bitfield */ , /* complain_on_overflow */ 148 bfd_elf_generic_reloc, /* special_function */ 149 "R_M68HC11_16", /* name */ 150 FALSE, /* partial_inplace */ 151 0xffff, /* src_mask */ 152 0xffff, /* dst_mask */ 153 FALSE), /* pcrel_offset */ 154 155 /* A 32 bit absolute relocation. This one is never used for the 156 code relocation. It's used by gas for -gstabs generation. */ 157 HOWTO (R_M68HC11_32, /* type */ 158 0, /* rightshift */ 159 2, /* size (0 = byte, 1 = short, 2 = long) */ 160 32, /* bitsize */ 161 FALSE, /* pc_relative */ 162 0, /* bitpos */ 163 complain_overflow_bitfield, /* complain_on_overflow */ 164 bfd_elf_generic_reloc, /* special_function */ 165 "R_M68HC11_32", /* name */ 166 FALSE, /* partial_inplace */ 167 0xffffffff, /* src_mask */ 168 0xffffffff, /* dst_mask */ 169 FALSE), /* pcrel_offset */ 170 171 /* A 3 bit absolute relocation */ 172 HOWTO (R_M68HC11_3B, /* type */ 173 0, /* rightshift */ 174 0, /* size (0 = byte, 1 = short, 2 = long) */ 175 3, /* bitsize */ 176 FALSE, /* pc_relative */ 177 0, /* bitpos */ 178 complain_overflow_bitfield, /* complain_on_overflow */ 179 bfd_elf_generic_reloc, /* special_function */ 180 "R_M68HC11_4B", /* name */ 181 FALSE, /* partial_inplace */ 182 0x003, /* src_mask */ 183 0x003, /* dst_mask */ 184 FALSE), /* pcrel_offset */ 185 186 /* A 16 bit PC-rel relocation */ 187 HOWTO (R_M68HC11_PCREL_16, /* type */ 188 0, /* rightshift */ 189 1, /* size (0 = byte, 1 = short, 2 = long) */ 190 16, /* bitsize */ 191 TRUE, /* pc_relative */ 192 0, /* bitpos */ 193 complain_overflow_dont, /* complain_on_overflow */ 194 bfd_elf_generic_reloc, /* special_function */ 195 "R_M68HC11_PCREL_16", /* name */ 196 FALSE, /* partial_inplace */ 197 0xffff, /* src_mask */ 198 0xffff, /* dst_mask */ 199 TRUE), /* pcrel_offset */ 200 201 /* GNU extension to record C++ vtable hierarchy */ 202 HOWTO (R_M68HC11_GNU_VTINHERIT, /* type */ 203 0, /* rightshift */ 204 1, /* size (0 = byte, 1 = short, 2 = long) */ 205 0, /* bitsize */ 206 FALSE, /* pc_relative */ 207 0, /* bitpos */ 208 complain_overflow_dont, /* complain_on_overflow */ 209 NULL, /* special_function */ 210 "R_M68HC11_GNU_VTINHERIT", /* name */ 211 FALSE, /* partial_inplace */ 212 0, /* src_mask */ 213 0, /* dst_mask */ 214 FALSE), /* pcrel_offset */ 215 216 /* GNU extension to record C++ vtable member usage */ 217 HOWTO (R_M68HC11_GNU_VTENTRY, /* type */ 218 0, /* rightshift */ 219 1, /* size (0 = byte, 1 = short, 2 = long) */ 220 0, /* bitsize */ 221 FALSE, /* pc_relative */ 222 0, /* bitpos */ 223 complain_overflow_dont, /* complain_on_overflow */ 224 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 225 "R_M68HC11_GNU_VTENTRY", /* name */ 226 FALSE, /* partial_inplace */ 227 0, /* src_mask */ 228 0, /* dst_mask */ 229 FALSE), /* pcrel_offset */ 230 231 /* A 24 bit relocation */ 232 HOWTO (R_M68HC11_24, /* type */ 233 0, /* rightshift */ 234 1, /* size (0 = byte, 1 = short, 2 = long) */ 235 24, /* bitsize */ 236 FALSE, /* pc_relative */ 237 0, /* bitpos */ 238 complain_overflow_bitfield, /* complain_on_overflow */ 239 bfd_elf_generic_reloc, /* special_function */ 240 "R_M68HC11_24", /* name */ 241 FALSE, /* partial_inplace */ 242 0xffffff, /* src_mask */ 243 0xffffff, /* dst_mask */ 244 FALSE), /* pcrel_offset */ 245 246 /* A 16-bit low relocation */ 247 HOWTO (R_M68HC11_LO16, /* type */ 248 0, /* rightshift */ 249 1, /* size (0 = byte, 1 = short, 2 = long) */ 250 16, /* bitsize */ 251 FALSE, /* pc_relative */ 252 0, /* bitpos */ 253 complain_overflow_bitfield, /* complain_on_overflow */ 254 bfd_elf_generic_reloc, /* special_function */ 255 "R_M68HC11_LO16", /* name */ 256 FALSE, /* partial_inplace */ 257 0xffff, /* src_mask */ 258 0xffff, /* dst_mask */ 259 FALSE), /* pcrel_offset */ 260 261 /* A page relocation */ 262 HOWTO (R_M68HC11_PAGE, /* type */ 263 0, /* rightshift */ 264 0, /* size (0 = byte, 1 = short, 2 = long) */ 265 8, /* bitsize */ 266 FALSE, /* pc_relative */ 267 0, /* bitpos */ 268 complain_overflow_bitfield, /* complain_on_overflow */ 269 bfd_elf_generic_reloc, /* special_function */ 270 "R_M68HC11_PAGE", /* name */ 271 FALSE, /* partial_inplace */ 272 0x00ff, /* src_mask */ 273 0x00ff, /* dst_mask */ 274 FALSE), /* pcrel_offset */ 275 276 EMPTY_HOWTO (14), 277 EMPTY_HOWTO (15), 278 EMPTY_HOWTO (16), 279 EMPTY_HOWTO (17), 280 EMPTY_HOWTO (18), 281 EMPTY_HOWTO (19), 282 283 /* Mark beginning of a jump instruction (any form). */ 284 HOWTO (R_M68HC11_RL_JUMP, /* type */ 285 0, /* rightshift */ 286 1, /* size (0 = byte, 1 = short, 2 = long) */ 287 0, /* bitsize */ 288 FALSE, /* pc_relative */ 289 0, /* bitpos */ 290 complain_overflow_dont, /* complain_on_overflow */ 291 m68hc11_elf_ignore_reloc, /* special_function */ 292 "R_M68HC11_RL_JUMP", /* name */ 293 TRUE, /* partial_inplace */ 294 0, /* src_mask */ 295 0, /* dst_mask */ 296 TRUE), /* pcrel_offset */ 297 298 /* Mark beginning of Gcc relaxation group instruction. */ 299 HOWTO (R_M68HC11_RL_GROUP, /* type */ 300 0, /* rightshift */ 301 1, /* size (0 = byte, 1 = short, 2 = long) */ 302 0, /* bitsize */ 303 FALSE, /* pc_relative */ 304 0, /* bitpos */ 305 complain_overflow_dont, /* complain_on_overflow */ 306 m68hc11_elf_ignore_reloc, /* special_function */ 307 "R_M68HC11_RL_GROUP", /* name */ 308 TRUE, /* partial_inplace */ 309 0, /* src_mask */ 310 0, /* dst_mask */ 311 TRUE), /* pcrel_offset */ 312}; 313 314/* Map BFD reloc types to M68HC11 ELF reloc types. */ 315 316struct m68hc11_reloc_map 317{ 318 bfd_reloc_code_real_type bfd_reloc_val; 319 unsigned char elf_reloc_val; 320}; 321 322static const struct m68hc11_reloc_map m68hc11_reloc_map[] = { 323 {BFD_RELOC_NONE, R_M68HC11_NONE,}, 324 {BFD_RELOC_8, R_M68HC11_8}, 325 {BFD_RELOC_M68HC11_HI8, R_M68HC11_HI8}, 326 {BFD_RELOC_M68HC11_LO8, R_M68HC11_LO8}, 327 {BFD_RELOC_8_PCREL, R_M68HC11_PCREL_8}, 328 {BFD_RELOC_16_PCREL, R_M68HC11_PCREL_16}, 329 {BFD_RELOC_16, R_M68HC11_16}, 330 {BFD_RELOC_32, R_M68HC11_32}, 331 {BFD_RELOC_M68HC11_3B, R_M68HC11_3B}, 332 333 {BFD_RELOC_VTABLE_INHERIT, R_M68HC11_GNU_VTINHERIT}, 334 {BFD_RELOC_VTABLE_ENTRY, R_M68HC11_GNU_VTENTRY}, 335 336 {BFD_RELOC_M68HC11_LO16, R_M68HC11_LO16}, 337 {BFD_RELOC_M68HC11_PAGE, R_M68HC11_PAGE}, 338 {BFD_RELOC_M68HC11_24, R_M68HC11_24}, 339 340 {BFD_RELOC_M68HC11_RL_JUMP, R_M68HC11_RL_JUMP}, 341 {BFD_RELOC_M68HC11_RL_GROUP, R_M68HC11_RL_GROUP}, 342}; 343 344static reloc_howto_type * 345bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 346 bfd_reloc_code_real_type code) 347{ 348 unsigned int i; 349 350 for (i = 0; 351 i < sizeof (m68hc11_reloc_map) / sizeof (struct m68hc11_reloc_map); 352 i++) 353 { 354 if (m68hc11_reloc_map[i].bfd_reloc_val == code) 355 return &elf_m68hc11_howto_table[m68hc11_reloc_map[i].elf_reloc_val]; 356 } 357 358 return NULL; 359} 360 361static reloc_howto_type * 362bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 363 const char *r_name) 364{ 365 unsigned int i; 366 367 for (i = 0; 368 i < (sizeof (elf_m68hc11_howto_table) 369 / sizeof (elf_m68hc11_howto_table[0])); 370 i++) 371 if (elf_m68hc11_howto_table[i].name != NULL 372 && strcasecmp (elf_m68hc11_howto_table[i].name, r_name) == 0) 373 return &elf_m68hc11_howto_table[i]; 374 375 return NULL; 376} 377 378/* Set the howto pointer for an M68HC11 ELF reloc. */ 379 380static void 381m68hc11_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, 382 arelent *cache_ptr, Elf_Internal_Rela *dst) 383{ 384 unsigned int r_type; 385 386 r_type = ELF32_R_TYPE (dst->r_info); 387 if (r_type >= (unsigned int) R_M68HC11_max) 388 { 389 /* xgettext:c-format */ 390 _bfd_error_handler (_("%B: invalid M68HC11 reloc number: %d"), abfd, r_type); 391 r_type = 0; 392 } 393 cache_ptr->howto = &elf_m68hc11_howto_table[r_type]; 394} 395 396 397/* Far trampoline generation. */ 398 399/* Build a 68HC11 trampoline stub. */ 400static bfd_boolean 401m68hc11_elf_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) 402{ 403 struct elf32_m68hc11_stub_hash_entry *stub_entry; 404 struct bfd_link_info *info; 405 struct m68hc11_elf_link_hash_table *htab; 406 asection *stub_sec; 407 bfd *stub_bfd; 408 bfd_byte *loc; 409 bfd_vma sym_value, phys_page, phys_addr; 410 411 /* Massage our args to the form they really have. */ 412 stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry; 413 info = (struct bfd_link_info *) in_arg; 414 415 htab = m68hc11_elf_hash_table (info); 416 if (htab == NULL) 417 return FALSE; 418 419 stub_sec = stub_entry->stub_sec; 420 421 /* Make a note of the offset within the stubs for this entry. */ 422 stub_entry->stub_offset = stub_sec->size; 423 stub_sec->size += 10; 424 loc = stub_sec->contents + stub_entry->stub_offset; 425 426 stub_bfd = stub_sec->owner; 427 428 /* Create the trampoline call stub: 429 430 pshb 431 ldab #%page(symbol) 432 ldy #%addr(symbol) 433 jmp __trampoline 434 435 */ 436 sym_value = (stub_entry->target_value 437 + stub_entry->target_section->output_offset 438 + stub_entry->target_section->output_section->vma); 439 phys_addr = m68hc11_phys_addr (&htab->pinfo, sym_value); 440 phys_page = m68hc11_phys_page (&htab->pinfo, sym_value); 441 442 /* pshb; ldab #%page(sym) */ 443 bfd_put_8 (stub_bfd, 0x37, loc); 444 bfd_put_8 (stub_bfd, 0xC6, loc + 1); 445 bfd_put_8 (stub_bfd, phys_page, loc + 2); 446 loc += 3; 447 448 /* ldy #%addr(sym) */ 449 bfd_put_8 (stub_bfd, 0x18, loc); 450 bfd_put_8 (stub_bfd, 0xCE, loc + 1); 451 bfd_put_16 (stub_bfd, phys_addr, loc + 2); 452 loc += 4; 453 454 /* jmp __trampoline */ 455 bfd_put_8 (stub_bfd, 0x7E, loc); 456 bfd_put_16 (stub_bfd, htab->pinfo.trampoline_addr, loc + 1); 457 458 return TRUE; 459} 460 461/* As above, but don't actually build the stub. Just bump offset so 462 we know stub section sizes. */ 463 464static bfd_boolean 465m68hc11_elf_size_one_stub (struct bfd_hash_entry *gen_entry, 466 void *in_arg ATTRIBUTE_UNUSED) 467{ 468 struct elf32_m68hc11_stub_hash_entry *stub_entry; 469 470 /* Massage our args to the form they really have. */ 471 stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry; 472 473 stub_entry->stub_sec->size += 10; 474 return TRUE; 475} 476 477/* Create a 68HC11 ELF linker hash table. */ 478 479static struct bfd_link_hash_table * 480m68hc11_elf_bfd_link_hash_table_create (bfd *abfd) 481{ 482 struct m68hc11_elf_link_hash_table *ret; 483 484 ret = m68hc11_elf_hash_table_create (abfd); 485 if (ret == (struct m68hc11_elf_link_hash_table *) NULL) 486 return NULL; 487 488 ret->size_one_stub = m68hc11_elf_size_one_stub; 489 ret->build_one_stub = m68hc11_elf_build_one_stub; 490 491 return &ret->root.root; 492} 493 494 495/* 68HC11 Linker Relaxation. */ 496 497struct m68hc11_direct_relax 498{ 499 const char *name; 500 unsigned char code; 501 unsigned char direct_code; 502} m68hc11_direct_relax_table[] = { 503 { "adca", 0xB9, 0x99 }, 504 { "adcb", 0xF9, 0xD9 }, 505 { "adda", 0xBB, 0x9B }, 506 { "addb", 0xFB, 0xDB }, 507 { "addd", 0xF3, 0xD3 }, 508 { "anda", 0xB4, 0x94 }, 509 { "andb", 0xF4, 0xD4 }, 510 { "cmpa", 0xB1, 0x91 }, 511 { "cmpb", 0xF1, 0xD1 }, 512 { "cpd", 0xB3, 0x93 }, 513 { "cpxy", 0xBC, 0x9C }, 514/* { "cpy", 0xBC, 0x9C }, */ 515 { "eora", 0xB8, 0x98 }, 516 { "eorb", 0xF8, 0xD8 }, 517 { "jsr", 0xBD, 0x9D }, 518 { "ldaa", 0xB6, 0x96 }, 519 { "ldab", 0xF6, 0xD6 }, 520 { "ldd", 0xFC, 0xDC }, 521 { "lds", 0xBE, 0x9E }, 522 { "ldxy", 0xFE, 0xDE }, 523 /* { "ldy", 0xFE, 0xDE },*/ 524 { "oraa", 0xBA, 0x9A }, 525 { "orab", 0xFA, 0xDA }, 526 { "sbca", 0xB2, 0x92 }, 527 { "sbcb", 0xF2, 0xD2 }, 528 { "staa", 0xB7, 0x97 }, 529 { "stab", 0xF7, 0xD7 }, 530 { "std", 0xFD, 0xDD }, 531 { "sts", 0xBF, 0x9F }, 532 { "stxy", 0xFF, 0xDF }, 533 /* { "sty", 0xFF, 0xDF },*/ 534 { "suba", 0xB0, 0x90 }, 535 { "subb", 0xF0, 0xD0 }, 536 { "subd", 0xB3, 0x93 }, 537 { 0, 0, 0 } 538}; 539 540static struct m68hc11_direct_relax * 541find_relaxable_insn (unsigned char code) 542{ 543 int i; 544 545 for (i = 0; m68hc11_direct_relax_table[i].name; i++) 546 if (m68hc11_direct_relax_table[i].code == code) 547 return &m68hc11_direct_relax_table[i]; 548 549 return 0; 550} 551 552static int 553compare_reloc (const void *e1, const void *e2) 554{ 555 const Elf_Internal_Rela *i1 = (const Elf_Internal_Rela *) e1; 556 const Elf_Internal_Rela *i2 = (const Elf_Internal_Rela *) e2; 557 558 if (i1->r_offset == i2->r_offset) 559 return 0; 560 else 561 return i1->r_offset < i2->r_offset ? -1 : 1; 562} 563 564#define M6811_OP_LDX_IMMEDIATE (0xCE) 565 566static void 567m68hc11_relax_group (bfd *abfd, asection *sec, bfd_byte *contents, 568 unsigned value, unsigned long offset, 569 unsigned long end_group) 570{ 571 unsigned char code; 572 unsigned long start_offset; 573 unsigned long ldx_offset = offset; 574 unsigned long ldx_size; 575 int can_delete_ldx; 576 int relax_ldy = 0; 577 578 /* First instruction of the relax group must be a 579 LDX #value or LDY #value. If this is not the case, 580 ignore the relax group. */ 581 code = bfd_get_8 (abfd, contents + offset); 582 if (code == 0x18) 583 { 584 relax_ldy++; 585 offset++; 586 code = bfd_get_8 (abfd, contents + offset); 587 } 588 ldx_size = offset - ldx_offset + 3; 589 offset += 3; 590 if (code != M6811_OP_LDX_IMMEDIATE || offset >= end_group) 591 return; 592 593 594 /* We can remove the LDX/LDY only when all bset/brclr instructions 595 of the relax group have been converted to use direct addressing 596 mode. */ 597 can_delete_ldx = 1; 598 while (offset < end_group) 599 { 600 unsigned isize; 601 unsigned new_value; 602 int bset_use_y; 603 604 bset_use_y = 0; 605 start_offset = offset; 606 code = bfd_get_8 (abfd, contents + offset); 607 if (code == 0x18) 608 { 609 bset_use_y++; 610 offset++; 611 code = bfd_get_8 (abfd, contents + offset); 612 } 613 614 /* Check the instruction and translate to use direct addressing mode. */ 615 switch (code) 616 { 617 /* bset */ 618 case 0x1C: 619 code = 0x14; 620 isize = 3; 621 break; 622 623 /* brclr */ 624 case 0x1F: 625 code = 0x13; 626 isize = 4; 627 break; 628 629 /* brset */ 630 case 0x1E: 631 code = 0x12; 632 isize = 4; 633 break; 634 635 /* bclr */ 636 case 0x1D: 637 code = 0x15; 638 isize = 3; 639 break; 640 641 /* This instruction is not recognized and we are not 642 at end of the relax group. Ignore and don't remove 643 the first LDX (we don't know what it is used for...). */ 644 default: 645 return; 646 } 647 new_value = (unsigned) bfd_get_8 (abfd, contents + offset + 1); 648 new_value += value; 649 if ((new_value & 0xff00) == 0 && bset_use_y == relax_ldy) 650 { 651 bfd_put_8 (abfd, code, contents + offset); 652 bfd_put_8 (abfd, new_value, contents + offset + 1); 653 if (start_offset != offset) 654 { 655 m68hc11_elf_relax_delete_bytes (abfd, sec, start_offset, 656 offset - start_offset); 657 end_group--; 658 } 659 } 660 else 661 { 662 can_delete_ldx = 0; 663 } 664 offset = start_offset + isize; 665 } 666 if (can_delete_ldx) 667 { 668 /* Remove the move instruction (3 or 4 bytes win). */ 669 m68hc11_elf_relax_delete_bytes (abfd, sec, ldx_offset, ldx_size); 670 } 671} 672 673/* This function handles relaxing for the 68HC11. 674 675 676 and somewhat more difficult to support. */ 677 678static bfd_boolean 679m68hc11_elf_relax_section (bfd *abfd, asection *sec, 680 struct bfd_link_info *link_info, bfd_boolean *again) 681{ 682 Elf_Internal_Shdr *symtab_hdr; 683 Elf_Internal_Rela *internal_relocs; 684 Elf_Internal_Rela *free_relocs = NULL; 685 Elf_Internal_Rela *irel, *irelend; 686 bfd_byte *contents = NULL; 687 bfd_byte *free_contents = NULL; 688 Elf32_External_Sym *free_extsyms = NULL; 689 Elf_Internal_Rela *prev_insn_branch = NULL; 690 Elf_Internal_Rela *prev_insn_group = NULL; 691 unsigned insn_group_value = 0; 692 Elf_Internal_Sym *isymbuf = NULL; 693 694 /* Assume nothing changes. */ 695 *again = FALSE; 696 697 /* We don't have to do anything for a relocatable link, if 698 this section does not have relocs, or if this is not a 699 code section. */ 700 if (bfd_link_relocatable (link_info) 701 || (sec->flags & SEC_RELOC) == 0 702 || sec->reloc_count == 0 703 || (sec->flags & SEC_CODE) == 0) 704 return TRUE; 705 706 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 707 708 /* Get a copy of the native relocations. */ 709 internal_relocs = (_bfd_elf_link_read_relocs 710 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, 711 link_info->keep_memory)); 712 if (internal_relocs == NULL) 713 goto error_return; 714 if (! link_info->keep_memory) 715 free_relocs = internal_relocs; 716 717 /* Checking for branch relaxation relies on the relocations to 718 be sorted on 'r_offset'. This is not guaranteed so we must sort. */ 719 qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), 720 compare_reloc); 721 722 /* Walk through them looking for relaxing opportunities. */ 723 irelend = internal_relocs + sec->reloc_count; 724 for (irel = internal_relocs; irel < irelend; irel++) 725 { 726 bfd_vma symval; 727 bfd_vma value; 728 Elf_Internal_Sym *isym; 729 asection *sym_sec; 730 int is_far = 0; 731 732 /* If this isn't something that can be relaxed, then ignore 733 this reloc. */ 734 if (ELF32_R_TYPE (irel->r_info) != (int) R_M68HC11_16 735 && ELF32_R_TYPE (irel->r_info) != (int) R_M68HC11_RL_JUMP 736 && ELF32_R_TYPE (irel->r_info) != (int) R_M68HC11_RL_GROUP) 737 { 738 prev_insn_branch = 0; 739 prev_insn_group = 0; 740 continue; 741 } 742 743 /* Get the section contents if we haven't done so already. */ 744 if (contents == NULL) 745 { 746 /* Get cached copy if it exists. */ 747 if (elf_section_data (sec)->this_hdr.contents != NULL) 748 contents = elf_section_data (sec)->this_hdr.contents; 749 else 750 { 751 /* Go get them off disk. */ 752 if (!bfd_malloc_and_get_section (abfd, sec, &contents)) 753 goto error_return; 754 } 755 } 756 757 /* Try to eliminate an unconditional 8 bit pc-relative branch 758 which immediately follows a conditional 8 bit pc-relative 759 branch around the unconditional branch. 760 761 original: new: 762 bCC lab1 bCC' lab2 763 bra lab2 764 lab1: lab1: 765 766 This happens when the bCC can't reach lab2 at assembly time, 767 but due to other relaxations it can reach at link time. */ 768 if (ELF32_R_TYPE (irel->r_info) == (int) R_M68HC11_RL_JUMP) 769 { 770 Elf_Internal_Rela *nrel; 771 unsigned char code; 772 unsigned char roffset; 773 774 prev_insn_branch = 0; 775 prev_insn_group = 0; 776 777 /* Do nothing if this reloc is the last byte in the section. */ 778 if (irel->r_offset + 2 >= sec->size) 779 continue; 780 781 /* See if the next instruction is an unconditional pc-relative 782 branch, more often than not this test will fail, so we 783 test it first to speed things up. */ 784 code = bfd_get_8 (abfd, contents + irel->r_offset + 2); 785 if (code != 0x7e) 786 continue; 787 788 /* Also make sure the next relocation applies to the next 789 instruction and that it's a pc-relative 8 bit branch. */ 790 nrel = irel + 1; 791 if (nrel == irelend 792 || irel->r_offset + 3 != nrel->r_offset 793 || ELF32_R_TYPE (nrel->r_info) != (int) R_M68HC11_16) 794 continue; 795 796 /* Make sure our destination immediately follows the 797 unconditional branch. */ 798 roffset = bfd_get_8 (abfd, contents + irel->r_offset + 1); 799 if (roffset != 3) 800 continue; 801 802 prev_insn_branch = irel; 803 prev_insn_group = 0; 804 continue; 805 } 806 807 /* Read this BFD's symbols if we haven't done so already. */ 808 if (isymbuf == NULL && symtab_hdr->sh_info != 0) 809 { 810 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 811 if (isymbuf == NULL) 812 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 813 symtab_hdr->sh_info, 0, 814 NULL, NULL, NULL); 815 if (isymbuf == NULL) 816 goto error_return; 817 } 818 819 /* Get the value of the symbol referred to by the reloc. */ 820 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 821 { 822 /* A local symbol. */ 823 isym = isymbuf + ELF32_R_SYM (irel->r_info); 824 is_far = isym->st_other & STO_M68HC12_FAR; 825 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); 826 symval = (isym->st_value 827 + sym_sec->output_section->vma 828 + sym_sec->output_offset); 829 } 830 else 831 { 832 unsigned long indx; 833 struct elf_link_hash_entry *h; 834 835 /* An external symbol. */ 836 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 837 h = elf_sym_hashes (abfd)[indx]; 838 BFD_ASSERT (h != NULL); 839 if (h->root.type != bfd_link_hash_defined 840 && h->root.type != bfd_link_hash_defweak) 841 { 842 /* This appears to be a reference to an undefined 843 symbol. Just ignore it--it will be caught by the 844 regular reloc processing. */ 845 prev_insn_branch = 0; 846 prev_insn_group = 0; 847 continue; 848 } 849 850 is_far = h->other & STO_M68HC12_FAR; 851 isym = 0; 852 sym_sec = h->root.u.def.section; 853 symval = (h->root.u.def.value 854 + sym_sec->output_section->vma 855 + sym_sec->output_offset); 856 } 857 858 if (ELF32_R_TYPE (irel->r_info) == (int) R_M68HC11_RL_GROUP) 859 { 860 prev_insn_branch = 0; 861 prev_insn_group = 0; 862 863 /* Do nothing if this reloc is the last byte in the section. */ 864 if (irel->r_offset == sec->size) 865 continue; 866 867 prev_insn_group = irel; 868 insn_group_value = isym->st_value; 869 continue; 870 } 871 872 /* When we relax some bytes, the size of our section changes. 873 This affects the layout of next input sections that go in our 874 output section. When the symbol is part of another section that 875 will go in the same output section as the current one, it's 876 final address may now be incorrect (too far). We must let the 877 linker re-compute all section offsets before processing this 878 reloc. Code example: 879 880 Initial Final 881 .sect .text section size = 6 section size = 4 882 jmp foo 883 jmp bar 884 .sect .text.foo_bar output_offset = 6 output_offset = 4 885 foo: rts 886 bar: rts 887 888 If we process the reloc now, the jmp bar is replaced by a 889 relative branch to the initial bar address (output_offset 6). */ 890 if (*again && sym_sec != sec 891 && sym_sec->output_section == sec->output_section) 892 { 893 prev_insn_group = 0; 894 prev_insn_branch = 0; 895 continue; 896 } 897 898 value = symval; 899 /* Try to turn a far branch to a near branch. */ 900 if (ELF32_R_TYPE (irel->r_info) == (int) R_M68HC11_16 901 && prev_insn_branch) 902 { 903 bfd_vma offset; 904 unsigned char code; 905 906 offset = value - (prev_insn_branch->r_offset 907 + sec->output_section->vma 908 + sec->output_offset + 2); 909 910 /* If the offset is still out of -128..+127 range, 911 leave that far branch unchanged. */ 912 if ((offset & 0xff80) != 0 && (offset & 0xff80) != 0xff80) 913 { 914 prev_insn_branch = 0; 915 continue; 916 } 917 918 /* Shrink the branch. */ 919 code = bfd_get_8 (abfd, contents + prev_insn_branch->r_offset); 920 if (code == 0x7e) 921 { 922 code = 0x20; 923 bfd_put_8 (abfd, code, contents + prev_insn_branch->r_offset); 924 bfd_put_8 (abfd, 0xff, 925 contents + prev_insn_branch->r_offset + 1); 926 irel->r_offset = prev_insn_branch->r_offset + 1; 927 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 928 R_M68HC11_PCREL_8); 929 m68hc11_elf_relax_delete_bytes (abfd, sec, 930 irel->r_offset + 1, 1); 931 } 932 else 933 { 934 code ^= 0x1; 935 bfd_put_8 (abfd, code, contents + prev_insn_branch->r_offset); 936 bfd_put_8 (abfd, 0xff, 937 contents + prev_insn_branch->r_offset + 1); 938 irel->r_offset = prev_insn_branch->r_offset + 1; 939 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 940 R_M68HC11_PCREL_8); 941 m68hc11_elf_relax_delete_bytes (abfd, sec, 942 irel->r_offset + 1, 3); 943 } 944 prev_insn_branch = 0; 945 *again = TRUE; 946 } 947 948 /* Try to turn a 16 bit address into a 8 bit page0 address. */ 949 else if (ELF32_R_TYPE (irel->r_info) == (int) R_M68HC11_16 950 && (value & 0xff00) == 0) 951 { 952 unsigned char code; 953 unsigned short offset; 954 struct m68hc11_direct_relax *rinfo; 955 956 prev_insn_branch = 0; 957 offset = bfd_get_16 (abfd, contents + irel->r_offset); 958 offset += value; 959 if ((offset & 0xff00) != 0) 960 { 961 prev_insn_group = 0; 962 continue; 963 } 964 965 if (prev_insn_group) 966 { 967 unsigned long old_sec_size = sec->size; 968 969 /* Note that we've changed the relocation contents, etc. */ 970 elf_section_data (sec)->relocs = internal_relocs; 971 free_relocs = NULL; 972 973 elf_section_data (sec)->this_hdr.contents = contents; 974 free_contents = NULL; 975 976 symtab_hdr->contents = (bfd_byte *) isymbuf; 977 free_extsyms = NULL; 978 979 m68hc11_relax_group (abfd, sec, contents, offset, 980 prev_insn_group->r_offset, 981 insn_group_value); 982 irel = prev_insn_group; 983 prev_insn_group = 0; 984 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 985 R_M68HC11_NONE); 986 if (sec->size != old_sec_size) 987 *again = TRUE; 988 continue; 989 } 990 991 /* Get the opcode. */ 992 code = bfd_get_8 (abfd, contents + irel->r_offset - 1); 993 rinfo = find_relaxable_insn (code); 994 if (rinfo == 0) 995 { 996 prev_insn_group = 0; 997 continue; 998 } 999 1000 /* Note that we've changed the relocation contents, etc. */ 1001 elf_section_data (sec)->relocs = internal_relocs; 1002 free_relocs = NULL; 1003 1004 elf_section_data (sec)->this_hdr.contents = contents; 1005 free_contents = NULL; 1006 1007 symtab_hdr->contents = (bfd_byte *) isymbuf; 1008 free_extsyms = NULL; 1009 1010 /* Fix the opcode. */ 1011 /* printf ("A relaxable case : 0x%02x (%s)\n", 1012 code, rinfo->name); */ 1013 bfd_put_8 (abfd, rinfo->direct_code, 1014 contents + irel->r_offset - 1); 1015 1016 /* Delete one byte of data (upper byte of address). */ 1017 m68hc11_elf_relax_delete_bytes (abfd, sec, irel->r_offset, 1); 1018 1019 /* Fix the relocation's type. */ 1020 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 1021 R_M68HC11_8); 1022 1023 /* That will change things, so, we should relax again. */ 1024 *again = TRUE; 1025 } 1026 else if (ELF32_R_TYPE (irel->r_info) == R_M68HC11_16 && !is_far) 1027 { 1028 unsigned char code; 1029 bfd_vma offset; 1030 1031 prev_insn_branch = 0; 1032 code = bfd_get_8 (abfd, contents + irel->r_offset - 1); 1033 if (code == 0x7e || code == 0xbd) 1034 { 1035 offset = value - (irel->r_offset 1036 + sec->output_section->vma 1037 + sec->output_offset + 1); 1038 offset += bfd_get_16 (abfd, contents + irel->r_offset); 1039 1040 /* If the offset is still out of -128..+127 range, 1041 leave that far branch unchanged. */ 1042 if ((offset & 0xff80) == 0 || (offset & 0xff80) == 0xff80) 1043 { 1044 1045 /* Note that we've changed the relocation contents, etc. */ 1046 elf_section_data (sec)->relocs = internal_relocs; 1047 free_relocs = NULL; 1048 1049 elf_section_data (sec)->this_hdr.contents = contents; 1050 free_contents = NULL; 1051 1052 symtab_hdr->contents = (bfd_byte *) isymbuf; 1053 free_extsyms = NULL; 1054 1055 /* Shrink the branch. */ 1056 code = (code == 0x7e) ? 0x20 : 0x8d; 1057 bfd_put_8 (abfd, code, 1058 contents + irel->r_offset - 1); 1059 bfd_put_8 (abfd, 0xff, 1060 contents + irel->r_offset); 1061 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 1062 R_M68HC11_PCREL_8); 1063 m68hc11_elf_relax_delete_bytes (abfd, sec, 1064 irel->r_offset + 1, 1); 1065 /* That will change things, so, we should relax again. */ 1066 *again = TRUE; 1067 } 1068 } 1069 } 1070 prev_insn_branch = 0; 1071 prev_insn_group = 0; 1072 } 1073 1074 if (free_relocs != NULL) 1075 { 1076 free (free_relocs); 1077 free_relocs = NULL; 1078 } 1079 1080 if (free_contents != NULL) 1081 { 1082 if (! link_info->keep_memory) 1083 free (free_contents); 1084 else 1085 { 1086 /* Cache the section contents for elf_link_input_bfd. */ 1087 elf_section_data (sec)->this_hdr.contents = contents; 1088 } 1089 free_contents = NULL; 1090 } 1091 1092 if (free_extsyms != NULL) 1093 { 1094 if (! link_info->keep_memory) 1095 free (free_extsyms); 1096 else 1097 { 1098 /* Cache the symbols for elf_link_input_bfd. */ 1099 symtab_hdr->contents = (unsigned char *) isymbuf; 1100 } 1101 free_extsyms = NULL; 1102 } 1103 1104 return TRUE; 1105 1106 error_return: 1107 if (free_relocs != NULL) 1108 free (free_relocs); 1109 if (free_contents != NULL) 1110 free (free_contents); 1111 if (free_extsyms != NULL) 1112 free (free_extsyms); 1113 return FALSE; 1114} 1115 1116/* Delete some bytes from a section while relaxing. */ 1117 1118static void 1119m68hc11_elf_relax_delete_bytes (bfd *abfd, asection *sec, 1120 bfd_vma addr, int count) 1121{ 1122 Elf_Internal_Shdr *symtab_hdr; 1123 unsigned int sec_shndx; 1124 bfd_byte *contents; 1125 Elf_Internal_Rela *irel, *irelend; 1126 bfd_vma toaddr; 1127 Elf_Internal_Sym *isymbuf, *isym, *isymend; 1128 struct elf_link_hash_entry **sym_hashes; 1129 struct elf_link_hash_entry **end_hashes; 1130 unsigned int symcount; 1131 1132 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1133 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 1134 1135 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); 1136 1137 contents = elf_section_data (sec)->this_hdr.contents; 1138 1139 toaddr = sec->size; 1140 1141 irel = elf_section_data (sec)->relocs; 1142 irelend = irel + sec->reloc_count; 1143 1144 /* Actually delete the bytes. */ 1145 memmove (contents + addr, contents + addr + count, 1146 (size_t) (toaddr - addr - count)); 1147 1148 sec->size -= count; 1149 1150 /* Adjust all the relocs. */ 1151 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) 1152 { 1153 unsigned char code; 1154 unsigned char offset; 1155 unsigned short raddr; 1156 unsigned long old_offset; 1157 int branch_pos; 1158 1159 old_offset = irel->r_offset; 1160 1161 /* See if this reloc was for the bytes we have deleted, in which 1162 case we no longer care about it. Don't delete relocs which 1163 represent addresses, though. */ 1164 if (ELF32_R_TYPE (irel->r_info) != R_M68HC11_RL_JUMP 1165 && irel->r_offset >= addr && irel->r_offset < addr + count) 1166 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 1167 R_M68HC11_NONE); 1168 1169 if (ELF32_R_TYPE (irel->r_info) == R_M68HC11_NONE) 1170 continue; 1171 1172 /* Get the new reloc address. */ 1173 if ((irel->r_offset > addr 1174 && irel->r_offset < toaddr)) 1175 irel->r_offset -= count; 1176 1177 /* If this is a PC relative reloc, see if the range it covers 1178 includes the bytes we have deleted. */ 1179 switch (ELF32_R_TYPE (irel->r_info)) 1180 { 1181 default: 1182 break; 1183 1184 case R_M68HC11_RL_JUMP: 1185 code = bfd_get_8 (abfd, contents + irel->r_offset); 1186 switch (code) 1187 { 1188 /* jsr and jmp instruction are also marked with RL_JUMP 1189 relocs but no adjustment must be made. */ 1190 case 0x7e: 1191 case 0x9d: 1192 case 0xbd: 1193 continue; 1194 1195 case 0x12: 1196 case 0x13: 1197 branch_pos = 3; 1198 raddr = 4; 1199 1200 /* Special case when we translate a brclr N,y into brclr *<addr> 1201 In this case, the 0x18 page2 prefix is removed. 1202 The reloc offset is not modified but the instruction 1203 size is reduced by 1. */ 1204 if (old_offset == addr) 1205 raddr++; 1206 break; 1207 1208 case 0x1e: 1209 case 0x1f: 1210 branch_pos = 3; 1211 raddr = 4; 1212 break; 1213 1214 case 0x18: 1215 branch_pos = 4; 1216 raddr = 5; 1217 break; 1218 1219 default: 1220 branch_pos = 1; 1221 raddr = 2; 1222 break; 1223 } 1224 offset = bfd_get_8 (abfd, contents + irel->r_offset + branch_pos); 1225 raddr += old_offset; 1226 raddr += ((unsigned short) offset | ((offset & 0x80) ? 0xff00 : 0)); 1227 if (irel->r_offset < addr && raddr > addr) 1228 { 1229 offset -= count; 1230 bfd_put_8 (abfd, offset, contents + irel->r_offset + branch_pos); 1231 } 1232 else if (irel->r_offset >= addr && raddr <= addr) 1233 { 1234 offset += count; 1235 bfd_put_8 (abfd, offset, contents + irel->r_offset + branch_pos); 1236 } 1237 else 1238 { 1239 /*printf ("Not adjusted 0x%04x [0x%4x 0x%4x]\n", raddr, 1240 irel->r_offset, addr);*/ 1241 } 1242 1243 break; 1244 } 1245 } 1246 1247 /* Adjust the local symbols defined in this section. */ 1248 isymend = isymbuf + symtab_hdr->sh_info; 1249 for (isym = isymbuf; isym < isymend; isym++) 1250 { 1251 if (isym->st_shndx == sec_shndx 1252 && isym->st_value > addr 1253 && isym->st_value <= toaddr) 1254 isym->st_value -= count; 1255 } 1256 1257 /* Now adjust the global symbols defined in this section. */ 1258 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) 1259 - symtab_hdr->sh_info); 1260 sym_hashes = elf_sym_hashes (abfd); 1261 end_hashes = sym_hashes + symcount; 1262 for (; sym_hashes < end_hashes; sym_hashes++) 1263 { 1264 struct elf_link_hash_entry *sym_hash = *sym_hashes; 1265 if ((sym_hash->root.type == bfd_link_hash_defined 1266 || sym_hash->root.type == bfd_link_hash_defweak) 1267 && sym_hash->root.u.def.section == sec 1268 && sym_hash->root.u.def.value > addr 1269 && sym_hash->root.u.def.value <= toaddr) 1270 { 1271 sym_hash->root.u.def.value -= count; 1272 } 1273 } 1274} 1275 1276/* Specific sections: 1277 - The .page0 is a data section that is mapped in [0x0000..0x00FF]. 1278 Page0 accesses are faster on the M68HC11. Soft registers used by GCC-m6811 1279 are located in .page0. 1280 - The .vectors is the section that represents the interrupt 1281 vectors. */ 1282static const struct bfd_elf_special_section elf32_m68hc11_special_sections[] = 1283{ 1284 { STRING_COMMA_LEN (".eeprom"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 1285 { STRING_COMMA_LEN (".page0"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 1286 { STRING_COMMA_LEN (".softregs"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 1287 { STRING_COMMA_LEN (".vectors"), 0, SHT_PROGBITS, SHF_ALLOC }, 1288 { NULL, 0, 0, 0, 0 } 1289}; 1290 1291#define ELF_ARCH bfd_arch_m68hc11 1292#define ELF_TARGET_ID M68HC11_ELF_DATA 1293#define ELF_MACHINE_CODE EM_68HC11 1294#define ELF_MAXPAGESIZE 0x1000 1295 1296#define TARGET_BIG_SYM m68hc11_elf32_vec 1297#define TARGET_BIG_NAME "elf32-m68hc11" 1298 1299#define elf_info_to_howto 0 1300#define elf_info_to_howto_rel m68hc11_info_to_howto_rel 1301#define bfd_elf32_bfd_relax_section m68hc11_elf_relax_section 1302#define elf_backend_check_relocs elf32_m68hc11_check_relocs 1303#define elf_backend_relocate_section elf32_m68hc11_relocate_section 1304#define elf_backend_add_symbol_hook elf32_m68hc11_add_symbol_hook 1305#define elf_backend_object_p 0 1306#define elf_backend_final_write_processing 0 1307#define elf_backend_can_gc_sections 1 1308#define elf_backend_special_sections elf32_m68hc11_special_sections 1309#define elf_backend_merge_symbol_attribute elf32_m68hc11_merge_symbol_attribute 1310 1311#define bfd_elf32_bfd_link_hash_table_create \ 1312 m68hc11_elf_bfd_link_hash_table_create 1313#define bfd_elf32_bfd_merge_private_bfd_data \ 1314 _bfd_m68hc11_elf_merge_private_bfd_data 1315#define bfd_elf32_bfd_set_private_flags _bfd_m68hc11_elf_set_private_flags 1316#define bfd_elf32_bfd_print_private_bfd_data \ 1317 _bfd_m68hc11_elf_print_private_bfd_data 1318 1319#include "elf32-target.h" 1320