bfd/elf32-m68hc12.c

   1 /* Motorola 68HC12-specific support for 32-bit ELF
   2    Copyright 1999, 2000, 2002, 2003, 2004, 2005, 2006, 2007
   3    Free Software Foundation, Inc.
   4    Contributed by Stephane Carrez (stcarrez@nerim.fr)
   5    (Heavily copied from the D10V port by Martin Hunt (hunt@cygnus.com))
   6
   7    This file is part of BFD, the Binary File Descriptor library.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  22    MA 02110-1301, USA.  */
  23
  24 #include "sysdep.h"
  25 #include "bfd.h"
  26 #include "bfdlink.h"
  27 #include "libbfd.h"
  28 #include "elf-bfd.h"
  29 #include "elf32-m68hc1x.h"
  30 #include "elf/m68hc11.h"
  31 #include "opcode/m68hc11.h"
  32
  33 /* Relocation functions.  */
  34 static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
  35   (bfd *, bfd_reloc_code_real_type);
  36 static void m68hc11_info_to_howto_rel
  37   (bfd *, arelent *, Elf_Internal_Rela *);
  38
  39 /* Trampoline generation.  */
  40 static bfd_boolean m68hc12_elf_size_one_stub
  41   (struct bfd_hash_entry *gen_entry, void *in_arg);
  42 static bfd_boolean m68hc12_elf_build_one_stub
  43   (struct bfd_hash_entry *gen_entry, void *in_arg);
  44 static struct bfd_link_hash_table* m68hc12_elf_bfd_link_hash_table_create
  45   (bfd*);
  46
  47 static bfd_boolean m68hc12_elf_set_mach_from_flags PARAMS ((bfd *));
  48
  49 /* Use REL instead of RELA to save space */
  50 #define USE_REL 1
  51
  52 /* The 68HC12 microcontroler has a memory bank switching system
  53    with a 16Kb window in the 64Kb address space.  The extended memory
  54    is mapped in the 16Kb window (at 0x8000).  The page register controls
  55    which 16Kb bank is mapped.  The call/rtc instructions take care of
  56    bank switching in function calls/returns.
  57
  58    For GNU Binutils to work, we consider there is a physical memory
  59    at 0..0x0ffff and a kind of virtual memory above that.  Symbols
  60    in virtual memory have their addresses treated in a special way
  61    when disassembling and when linking.
  62
  63    For the linker to work properly, we must always relocate the virtual
  64    memory as if it is mapped at 0x8000.  When a 16-bit relocation is
  65    made in the virtual memory, we check that it does not cross the
  66    memory bank where it is used.  This would involve a page change
  67    which would be wrong.  The 24-bit relocation is for that and it
  68    treats the address as a physical address + page number.
  69
  70
  71                                         Banked
  72                                         Address Space
  73                                         |               |       Page n
  74                                         +---------------+ 0x1010000
  75                                         |               |
  76                                         | jsr _foo      |
  77                                         | ..            |       Page 3
  78                                         | _foo:         |
  79                                         +---------------+ 0x100C000
  80                                         |               |
  81                                         | call _bar     |
  82                                         | ..            |       Page 2
  83                                         | _bar:         |
  84                                         +---------------+ 0x1008000
  85                                 /------>|               |
  86                                 |       | call _foo     |       Page 1
  87                                 |       |               |
  88                                 |       +---------------+ 0x1004000
  89       Physical                  |       |               |
  90       Address Space             |       |               |       Page 0
  91                                 |       |               |
  92     +-----------+ 0x00FFFF      |       +---------------+ 0x1000000
  93     |           |               |
  94     | call _foo |               |
  95     |           |               |
  96     +-----------+ 0x00BFFF -+---/
  97     |           |           |
  98     |           |           |
  99     |           | 16K       |
 100     |           |           |
 101     +-----------+ 0x008000 -+
 102     |           |
 103     |           |
 104     =           =
 105     |           |
 106     |           |
 107     +-----------+ 0000
 108
 109
 110    The 'call _foo' must be relocated with page 3 and 16-bit address
 111    mapped at 0x8000.
 112
 113    The 3-bit and 16-bit PC rel relocation is only used by 68HC12.  */
 114 static reloc_howto_type elf_m68hc11_howto_table[] = {
 115   /* This reloc does nothing.  */
 116   HOWTO (R_M68HC11_NONE,        /* type */
 117          0,                     /* rightshift */
 118          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 119          32,                    /* bitsize */
 120          FALSE,                 /* pc_relative */
 121          0,                     /* bitpos */
 122          complain_overflow_dont,/* complain_on_overflow */
 123          bfd_elf_generic_reloc, /* special_function */
 124          "R_M68HC12_NONE",      /* name */
 125          FALSE,                 /* partial_inplace */
 126          0,                     /* src_mask */
 127          0,                     /* dst_mask */
 128          FALSE),                /* pcrel_offset */
 129
 130   /* A 8 bit absolute relocation */
 131   HOWTO (R_M68HC11_8,           /* type */
 132          0,                     /* rightshift */
 133          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 134          8,                     /* bitsize */
 135          FALSE,                 /* pc_relative */
 136          0,                     /* bitpos */
 137          complain_overflow_bitfield,    /* complain_on_overflow */
 138          bfd_elf_generic_reloc, /* special_function */
 139          "R_M68HC12_8",         /* name */
 140          FALSE,                 /* partial_inplace */
 141          0x00ff,                /* src_mask */
 142          0x00ff,                /* dst_mask */
 143          FALSE),                /* pcrel_offset */
 144
 145   /* A 8 bit absolute relocation (upper address) */
 146   HOWTO (R_M68HC11_HI8,         /* type */
 147          8,                     /* rightshift */
 148          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 149          8,                     /* bitsize */
 150          FALSE,                 /* pc_relative */
 151          0,                     /* bitpos */
 152          complain_overflow_bitfield,    /* complain_on_overflow */
 153          bfd_elf_generic_reloc, /* special_function */
 154          "R_M68HC12_HI8",       /* name */
 155          FALSE,                 /* partial_inplace */
 156          0x00ff,                /* src_mask */
 157          0x00ff,                /* dst_mask */
 158          FALSE),                /* pcrel_offset */
 159
 160   /* A 8 bit absolute relocation (upper address) */
 161   HOWTO (R_M68HC11_LO8,         /* type */
 162          0,                     /* rightshift */
 163          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 164          8,                     /* bitsize */
 165          FALSE,                 /* pc_relative */
 166          0,                     /* bitpos */
 167          complain_overflow_dont,        /* complain_on_overflow */
 168          bfd_elf_generic_reloc, /* special_function */
 169          "R_M68HC12_LO8",       /* name */
 170          FALSE,                 /* partial_inplace */
 171          0x00ff,                /* src_mask */
 172          0x00ff,                /* dst_mask */
 173          FALSE),                /* pcrel_offset */
 174
 175   /* A 8 bit PC-rel relocation */
 176   HOWTO (R_M68HC11_PCREL_8,     /* type */
 177          0,                     /* rightshift */
 178          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 179          8,                     /* bitsize */
 180          TRUE,                  /* pc_relative */
 181          0,                     /* bitpos */
 182          complain_overflow_bitfield,    /* complain_on_overflow */
 183          bfd_elf_generic_reloc, /* special_function */
 184          "R_M68HC12_PCREL_8",   /* name */
 185          FALSE,                 /* partial_inplace */
 186          0x00ff,                /* src_mask */
 187          0x00ff,                /* dst_mask */
 188          TRUE),                 /* pcrel_offset */
 189
 190   /* A 16 bit absolute relocation */
 191   HOWTO (R_M68HC11_16,          /* type */
 192          0,                     /* rightshift */
 193          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 194          16,                    /* bitsize */
 195          FALSE,                 /* pc_relative */
 196          0,                     /* bitpos */
 197          complain_overflow_dont /*bitfield */ , /* complain_on_overflow */
 198          bfd_elf_generic_reloc, /* special_function */
 199          "R_M68HC12_16",        /* name */
 200          FALSE,                 /* partial_inplace */
 201          0xffff,                /* src_mask */
 202          0xffff,                /* dst_mask */
 203          FALSE),                /* pcrel_offset */
 204
 205   /* A 32 bit absolute relocation.  This one is never used for the
 206      code relocation.  It's used by gas for -gstabs generation.  */
 207   HOWTO (R_M68HC11_32,          /* type */
 208          0,                     /* rightshift */
 209          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 210          32,                    /* bitsize */
 211          FALSE,                 /* pc_relative */
 212          0,                     /* bitpos */
 213          complain_overflow_bitfield,    /* complain_on_overflow */
 214          bfd_elf_generic_reloc, /* special_function */
 215          "R_M68HC12_32",        /* name */
 216          FALSE,                 /* partial_inplace */
 217          0xffffffff,            /* src_mask */
 218          0xffffffff,            /* dst_mask */
 219          FALSE),                /* pcrel_offset */
 220
 221   /* A 3 bit absolute relocation */
 222   HOWTO (R_M68HC11_3B,          /* type */
 223          0,                     /* rightshift */
 224          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 225          3,                     /* bitsize */
 226          FALSE,                 /* pc_relative */
 227          0,                     /* bitpos */
 228          complain_overflow_bitfield,    /* complain_on_overflow */
 229          bfd_elf_generic_reloc, /* special_function */
 230          "R_M68HC12_4B",        /* name */
 231          FALSE,                 /* partial_inplace */
 232          0x003,                 /* src_mask */
 233          0x003,                 /* dst_mask */
 234          FALSE),                /* pcrel_offset */
 235
 236   /* A 16 bit PC-rel relocation */
 237   HOWTO (R_M68HC11_PCREL_16,    /* type */
 238          0,                     /* rightshift */
 239          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 240          16,                    /* bitsize */
 241          TRUE,                  /* pc_relative */
 242          0,                     /* bitpos */
 243          complain_overflow_dont,        /* complain_on_overflow */
 244          bfd_elf_generic_reloc, /* special_function */
 245          "R_M68HC12_PCREL_16",  /* name */
 246          FALSE,                 /* partial_inplace */
 247          0xffff,                /* src_mask */
 248          0xffff,                /* dst_mask */
 249          TRUE),                 /* pcrel_offset */
 250
 251   /* GNU extension to record C++ vtable hierarchy */
 252   HOWTO (R_M68HC11_GNU_VTINHERIT,       /* type */
 253          0,                     /* rightshift */
 254          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 255          0,                     /* bitsize */
 256          FALSE,                 /* pc_relative */
 257          0,                     /* bitpos */
 258          complain_overflow_dont,        /* complain_on_overflow */
 259          NULL,                  /* special_function */
 260          "R_M68HC11_GNU_VTINHERIT",     /* name */
 261          FALSE,                 /* partial_inplace */
 262          0,                     /* src_mask */
 263          0,                     /* dst_mask */
 264          FALSE),                /* pcrel_offset */
 265
 266   /* GNU extension to record C++ vtable member usage */
 267   HOWTO (R_M68HC11_GNU_VTENTRY, /* type */
 268          0,                     /* rightshift */
 269          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 270          0,                     /* bitsize */
 271          FALSE,                 /* pc_relative */
 272          0,                     /* bitpos */
 273          complain_overflow_dont,        /* complain_on_overflow */
 274          _bfd_elf_rel_vtable_reloc_fn,  /* special_function */
 275          "R_M68HC11_GNU_VTENTRY",       /* name */
 276          FALSE,                 /* partial_inplace */
 277          0,                     /* src_mask */
 278          0,                     /* dst_mask */
 279          FALSE),                /* pcrel_offset */
 280
 281   /* A 24 bit relocation */
 282   HOWTO (R_M68HC11_24,          /* type */
 283          0,                     /* rightshift */
 284          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 285          24,                    /* bitsize */
 286          FALSE,                 /* pc_relative */
 287          0,                     /* bitpos */
 288          complain_overflow_dont,        /* complain_on_overflow */
 289          m68hc11_elf_special_reloc,     /* special_function */
 290          "R_M68HC12_24",        /* name */
 291          FALSE,                 /* partial_inplace */
 292          0xffffff,              /* src_mask */
 293          0xffffff,              /* dst_mask */
 294          FALSE),                /* pcrel_offset */
 295
 296   /* A 16-bit low relocation */
 297   HOWTO (R_M68HC11_LO16,        /* type */
 298          0,                     /* rightshift */
 299          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 300          16,                    /* bitsize */
 301          FALSE,                 /* pc_relative */
 302          0,                     /* bitpos */
 303          complain_overflow_dont,        /* complain_on_overflow */
 304          m68hc11_elf_special_reloc,/* special_function */
 305          "R_M68HC12_LO16",      /* name */
 306          FALSE,                 /* partial_inplace */
 307          0xffff,                /* src_mask */
 308          0xffff,                /* dst_mask */
 309          FALSE),                /* pcrel_offset */
 310
 311   /* A page relocation */
 312   HOWTO (R_M68HC11_PAGE,        /* type */
 313          0,                     /* rightshift */
 314          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 315          8,                     /* bitsize */
 316          FALSE,                 /* pc_relative */
 317          0,                     /* bitpos */
 318          complain_overflow_dont,        /* complain_on_overflow */
 319          m68hc11_elf_special_reloc,/* special_function */
 320          "R_M68HC12_PAGE",      /* name */
 321          FALSE,                 /* partial_inplace */
 322          0x00ff,                /* src_mask */
 323          0x00ff,                /* dst_mask */
 324          FALSE),                /* pcrel_offset */
 325
 326   EMPTY_HOWTO (14),
 327   EMPTY_HOWTO (15),
 328   EMPTY_HOWTO (16),
 329   EMPTY_HOWTO (17),
 330   EMPTY_HOWTO (18),
 331   EMPTY_HOWTO (19),
 332
 333   /* Mark beginning of a jump instruction (any form).  */
 334   HOWTO (R_M68HC11_RL_JUMP,     /* type */
 335          0,                     /* rightshift */
 336          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 337          0,                     /* bitsize */
 338          FALSE,                 /* pc_relative */
 339          0,                     /* bitpos */
 340          complain_overflow_dont,        /* complain_on_overflow */
 341          m68hc11_elf_ignore_reloc,      /* special_function */
 342          "R_M68HC12_RL_JUMP",   /* name */
 343          TRUE,                  /* partial_inplace */
 344          0,                     /* src_mask */
 345          0,                     /* dst_mask */
 346          TRUE),                 /* pcrel_offset */
 347
 348   /* Mark beginning of Gcc relaxation group instruction.  */
 349   HOWTO (R_M68HC11_RL_GROUP,    /* type */
 350          0,                     /* rightshift */
 351          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 352          0,                     /* bitsize */
 353          FALSE,                 /* pc_relative */
 354          0,                     /* bitpos */
 355          complain_overflow_dont,        /* complain_on_overflow */
 356          m68hc11_elf_ignore_reloc,      /* special_function */
 357          "R_M68HC12_RL_GROUP",  /* name */
 358          TRUE,                  /* partial_inplace */
 359          0,                     /* src_mask */
 360          0,                     /* dst_mask */
 361          TRUE),                 /* pcrel_offset */
 362 };
 363
 364 /* Map BFD reloc types to M68HC11 ELF reloc types.  */
 365
 366 struct m68hc11_reloc_map
 367 {
 368   bfd_reloc_code_real_type bfd_reloc_val;
 369   unsigned char elf_reloc_val;
 370 };
 371
 372 static const struct m68hc11_reloc_map m68hc11_reloc_map[] = {
 373   {BFD_RELOC_NONE, R_M68HC11_NONE,},
 374   {BFD_RELOC_8, R_M68HC11_8},
 375   {BFD_RELOC_M68HC11_HI8, R_M68HC11_HI8},
 376   {BFD_RELOC_M68HC11_LO8, R_M68HC11_LO8},
 377   {BFD_RELOC_8_PCREL, R_M68HC11_PCREL_8},
 378   {BFD_RELOC_16_PCREL, R_M68HC11_PCREL_16},
 379   {BFD_RELOC_16, R_M68HC11_16},
 380   {BFD_RELOC_32, R_M68HC11_32},
 381   {BFD_RELOC_M68HC11_3B, R_M68HC11_3B},
 382
 383   {BFD_RELOC_VTABLE_INHERIT, R_M68HC11_GNU_VTINHERIT},
 384   {BFD_RELOC_VTABLE_ENTRY, R_M68HC11_GNU_VTENTRY},
 385
 386   {BFD_RELOC_M68HC11_LO16, R_M68HC11_LO16},
 387   {BFD_RELOC_M68HC11_PAGE, R_M68HC11_PAGE},
 388   {BFD_RELOC_M68HC11_24, R_M68HC11_24},
 389
 390   {BFD_RELOC_M68HC11_RL_JUMP, R_M68HC11_RL_JUMP},
 391   {BFD_RELOC_M68HC11_RL_GROUP, R_M68HC11_RL_GROUP},
 392 };
 393
 394 static reloc_howto_type *
 395 bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 396                                  bfd_reloc_code_real_type code)
 397 {
 398   unsigned int i;
 399
 400   for (i = 0;
 401        i < sizeof (m68hc11_reloc_map) / sizeof (struct m68hc11_reloc_map);
 402        i++)
 403     {
 404       if (m68hc11_reloc_map[i].bfd_reloc_val == code)
 405         return &elf_m68hc11_howto_table[m68hc11_reloc_map[i].elf_reloc_val];
 406     }
 407
 408   return NULL;
 409 }
 410
 411 static reloc_howto_type *
 412 bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 413                                  const char *r_name)
 414 {
 415   unsigned int i;
 416
 417   for (i = 0;
 418        i < (sizeof (elf_m68hc11_howto_table)
 419             / sizeof (elf_m68hc11_howto_table[0]));
 420        i++)
 421     if (elf_m68hc11_howto_table[i].name != NULL
 422         && strcasecmp (elf_m68hc11_howto_table[i].name, r_name) == 0)
 423       return &elf_m68hc11_howto_table[i];
 424
 425   return NULL;
 426 }
 427
 428 /* Set the howto pointer for an M68HC11 ELF reloc.  */
 429
 430 static void
 431 m68hc11_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
 432                            arelent *cache_ptr, Elf_Internal_Rela *dst)
 433 {
 434   unsigned int r_type;
 435
 436   r_type = ELF32_R_TYPE (dst->r_info);
 437   BFD_ASSERT (r_type < (unsigned int) R_M68HC11_max);
 438   cache_ptr->howto = &elf_m68hc11_howto_table[r_type];
 439 }
 440
 441 \f
 442 /* Far trampoline generation.  */
 443
 444 /* Build a 68HC12 trampoline stub.  */
 445 static bfd_boolean
 446 m68hc12_elf_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
 447 {
 448   struct elf32_m68hc11_stub_hash_entry *stub_entry;
 449   struct bfd_link_info *info;
 450   struct m68hc11_elf_link_hash_table *htab;
 451   asection *stub_sec;
 452   bfd *stub_bfd;
 453   bfd_byte *loc;
 454   bfd_vma sym_value, phys_page, phys_addr;
 455
 456   /* Massage our args to the form they really have.  */
 457   stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry;
 458   info = (struct bfd_link_info *) in_arg;
 459
 460   htab = m68hc11_elf_hash_table (info);
 461
 462   stub_sec = stub_entry->stub_sec;
 463
 464   /* Make a note of the offset within the stubs for this entry.  */
 465   stub_entry->stub_offset = stub_sec->size;
 466   stub_sec->size += 7;
 467   loc = stub_sec->contents + stub_entry->stub_offset;
 468
 469   stub_bfd = stub_sec->owner;
 470
 471   /* Create the trampoline call stub:
 472
 473      ldy #%addr(symbol)
 474      call %page(symbol), __trampoline
 475
 476   */
 477   sym_value = (stub_entry->target_value
 478                + stub_entry->target_section->output_offset
 479                + stub_entry->target_section->output_section->vma);
 480   phys_addr = m68hc11_phys_addr (&htab->pinfo, sym_value);
 481   phys_page = m68hc11_phys_page (&htab->pinfo, sym_value);
 482
 483   /* ldy #%page(sym) */
 484   bfd_put_8 (stub_bfd, 0xCD, loc);
 485   bfd_put_16 (stub_bfd, phys_addr, loc + 1);
 486   loc += 3;
 487
 488   /* call %page(sym), __trampoline  */
 489   bfd_put_8 (stub_bfd, 0x4a, loc);
 490   bfd_put_16 (stub_bfd, htab->pinfo.trampoline_addr, loc + 1);
 491   bfd_put_8 (stub_bfd, phys_page, loc + 3);
 492
 493   return TRUE;
 494 }
 495
 496 /* As above, but don't actually build the stub.  Just bump offset so
 497    we know stub section sizes.  */
 498
 499 static bfd_boolean
 500 m68hc12_elf_size_one_stub (struct bfd_hash_entry *gen_entry,
 501                            void *in_arg ATTRIBUTE_UNUSED)
 502 {
 503   struct elf32_m68hc11_stub_hash_entry *stub_entry;
 504
 505   /* Massage our args to the form they really have.  */
 506   stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry;
 507
 508   stub_entry->stub_sec->size += 7;
 509   return TRUE;
 510 }
 511
 512 /* Create a 68HC12 ELF linker hash table.  */
 513
 514 static struct bfd_link_hash_table *
 515 m68hc12_elf_bfd_link_hash_table_create (bfd *abfd)
 516 {
 517   struct m68hc11_elf_link_hash_table *ret;
 518
 519   ret = m68hc11_elf_hash_table_create (abfd);
 520   if (ret == (struct m68hc11_elf_link_hash_table *) NULL)
 521     return NULL;
 522
 523   ret->size_one_stub = m68hc12_elf_size_one_stub;
 524   ret->build_one_stub = m68hc12_elf_build_one_stub;
 525
 526   return &ret->root.root;
 527 }
 528 \f
 529 static bfd_boolean
 530 m68hc12_elf_set_mach_from_flags (bfd *abfd)
 531 {
 532   flagword flags = elf_elfheader (abfd)->e_flags;
 533
 534   switch (flags & EF_M68HC11_MACH_MASK)
 535     {
 536     case EF_M68HC12_MACH:
 537       bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12, bfd_mach_m6812);
 538       break;
 539     case EF_M68HCS12_MACH:
 540       bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12, bfd_mach_m6812s);
 541       break;
 542     case EF_M68HC11_GENERIC:
 543       bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12,
 544                                  bfd_mach_m6812_default);
 545       break;
 546     default:
 547       return FALSE;
 548     }
 549   return TRUE;
 550 }
 551
 552 /* Specific sections:
 553    - The .page0 is a data section that is mapped in [0x0000..0x00FF].
 554      Page0 accesses are faster on the M68HC12.
 555    - The .vectors is the section that represents the interrupt
 556      vectors.  */
 557 static const struct bfd_elf_special_section elf32_m68hc12_special_sections[] =
 558 {
 559   { STRING_COMMA_LEN (".eeprom"),   0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
 560   { STRING_COMMA_LEN (".page0"),    0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
 561   { STRING_COMMA_LEN (".softregs"), 0, SHT_NOBITS,   SHF_ALLOC + SHF_WRITE },
 562   { STRING_COMMA_LEN (".vectors"),  0, SHT_PROGBITS, SHF_ALLOC },
 563   { NULL,                       0,  0, 0,            0 }
 564 };
 565 \f
 566 #define ELF_ARCH                bfd_arch_m68hc12
 567 #define ELF_TARGET_ID           M68HC11_ELF_DATA
 568 #define ELF_MACHINE_CODE        EM_68HC12
 569 #define ELF_MAXPAGESIZE         0x1000
 570
 571 #define TARGET_BIG_SYM          bfd_elf32_m68hc12_vec
 572 #define TARGET_BIG_NAME         "elf32-m68hc12"
 573
 574 #define elf_info_to_howto       0
 575 #define elf_info_to_howto_rel   m68hc11_info_to_howto_rel
 576 #define elf_backend_check_relocs     elf32_m68hc11_check_relocs
 577 #define elf_backend_relocate_section elf32_m68hc11_relocate_section
 578 #define elf_backend_object_p            m68hc12_elf_set_mach_from_flags
 579 #define elf_backend_final_write_processing      0
 580 #define elf_backend_can_gc_sections             1
 581 #define elf_backend_special_sections elf32_m68hc12_special_sections
 582 #define elf_backend_post_process_headers     elf32_m68hc11_post_process_headers
 583 #define elf_backend_add_symbol_hook  elf32_m68hc11_add_symbol_hook
 584
 585 #define bfd_elf32_bfd_link_hash_table_create \
 586                                 m68hc12_elf_bfd_link_hash_table_create
 587 #define bfd_elf32_bfd_link_hash_table_free \
 588                                 m68hc11_elf_bfd_link_hash_table_free
 589 #define bfd_elf32_bfd_merge_private_bfd_data \
 590                                         _bfd_m68hc11_elf_merge_private_bfd_data
 591 #define bfd_elf32_bfd_set_private_flags _bfd_m68hc11_elf_set_private_flags
 592 #define bfd_elf32_bfd_print_private_bfd_data \
 593                                         _bfd_m68hc11_elf_print_private_bfd_data
 594
 595 #include "elf32-target.h"