1 /* Motorola 68HC12-specific support for 32-bit ELF
2 Copyright (C) 1999-2024 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. */
33 static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
34 (bfd *, bfd_reloc_code_real_type);
35 static bool 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 0, /* size */
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 1, /* size */
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 1, /* size */
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 1, /* size */
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 1, /* size */
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 2, /* size */
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 4, /* size */
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 1, /* size */
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 2, /* size */
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 2, /* size */
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 2, /* size */
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 4, /* size */
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 2, /* size */
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 1, /* size */
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 2, /* size */
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 2, /* size */
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 2, /* size */
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 1, /* size */
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 1, /* size */
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 2, /* size */
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 2, /* size */
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 *
bfd_elf32_bfd_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)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 *
bfd_elf32_bfd_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)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 bool
m68hc11_info_to_howto_rel(bfd * abfd,arelent * cache_ptr,Elf_Internal_Rela * dst)501 m68hc11_info_to_howto_rel (bfd *abfd,
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 /* xgettext:c-format */
510 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
511 abfd, r_type);
512 bfd_set_error (bfd_error_bad_value);
513 return false;
514 }
515 cache_ptr->howto = &elf_m68hc11_howto_table[r_type];
516 return true;
517 }
518
519
520 /* Far trampoline generation. */
521
522 /* Build a 68HC12 trampoline stub. */
523 static bool
m68hc12_elf_build_one_stub(struct bfd_hash_entry * gen_entry,void * in_arg)524 m68hc12_elf_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
525 {
526 struct elf32_m68hc11_stub_hash_entry *stub_entry;
527 struct bfd_link_info *info;
528 struct m68hc11_elf_link_hash_table *htab;
529 asection *stub_sec;
530 bfd *stub_bfd;
531 bfd_byte *loc;
532 bfd_vma sym_value, phys_page, phys_addr;
533
534 /* Massage our args to the form they really have. */
535 stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry;
536 info = (struct bfd_link_info *) in_arg;
537
538 /* Fail if the target section could not be assigned to an output
539 section. The user should fix his linker script. */
540 if (stub_entry->target_section->output_section == NULL
541 && info->non_contiguous_regions)
542 info->callbacks->einfo (_("%F%P: Could not assign `%pA' to an output section. "
543 "Retry without --enable-non-contiguous-regions.\n"),
544 stub_entry->target_section);
545
546 htab = m68hc11_elf_hash_table (info);
547
548 stub_sec = stub_entry->stub_sec;
549
550 /* Make a note of the offset within the stubs for this entry. */
551 stub_entry->stub_offset = stub_sec->size;
552 stub_sec->size += 7;
553 loc = stub_sec->contents + stub_entry->stub_offset;
554
555 stub_bfd = stub_sec->owner;
556
557 /* Create the trampoline call stub:
558
559 ldy #%addr(symbol)
560 call %page(symbol), __trampoline
561
562 */
563 sym_value = (stub_entry->target_value
564 + stub_entry->target_section->output_offset
565 + stub_entry->target_section->output_section->vma);
566 phys_addr = m68hc11_phys_addr (&htab->pinfo, sym_value);
567 phys_page = m68hc11_phys_page (&htab->pinfo, sym_value);
568
569 /* ldy #%page(sym) */
570 bfd_put_8 (stub_bfd, 0xCD, loc);
571 bfd_put_16 (stub_bfd, phys_addr, loc + 1);
572 loc += 3;
573
574 /* call %page(sym), __trampoline */
575 bfd_put_8 (stub_bfd, 0x4a, loc);
576 bfd_put_16 (stub_bfd, htab->pinfo.trampoline_addr, loc + 1);
577 bfd_put_8 (stub_bfd, phys_page, loc + 3);
578
579 return true;
580 }
581
582 /* As above, but don't actually build the stub. Just bump offset so
583 we know stub section sizes. */
584
585 static bool
m68hc12_elf_size_one_stub(struct bfd_hash_entry * gen_entry,void * in_arg ATTRIBUTE_UNUSED)586 m68hc12_elf_size_one_stub (struct bfd_hash_entry *gen_entry,
587 void *in_arg ATTRIBUTE_UNUSED)
588 {
589 struct elf32_m68hc11_stub_hash_entry *stub_entry;
590
591 /* Massage our args to the form they really have. */
592 stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry;
593
594 stub_entry->stub_sec->size += 7;
595 return true;
596 }
597
598 /* Create a 68HC12 ELF linker hash table. */
599
600 static struct bfd_link_hash_table *
m68hc12_elf_bfd_link_hash_table_create(bfd * abfd)601 m68hc12_elf_bfd_link_hash_table_create (bfd *abfd)
602 {
603 struct m68hc11_elf_link_hash_table *ret;
604
605 ret = m68hc11_elf_hash_table_create (abfd);
606 if (ret == (struct m68hc11_elf_link_hash_table *) NULL)
607 return NULL;
608
609 ret->size_one_stub = m68hc12_elf_size_one_stub;
610 ret->build_one_stub = m68hc12_elf_build_one_stub;
611
612 return &ret->root.root;
613 }
614
615 static bool
m68hc12_elf_set_mach_from_flags(bfd * abfd)616 m68hc12_elf_set_mach_from_flags (bfd *abfd)
617 {
618 flagword flags = elf_elfheader (abfd)->e_flags;
619
620 switch (flags & EF_M68HC11_MACH_MASK)
621 {
622 case EF_M68HC12_MACH:
623 bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12, bfd_mach_m6812);
624 break;
625 case EF_M68HCS12_MACH:
626 bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12, bfd_mach_m6812s);
627 break;
628 case EF_M68HC11_GENERIC:
629 bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12,
630 bfd_mach_m6812_default);
631 break;
632 default:
633 return false;
634 }
635 return true;
636 }
637
638 /* Specific sections:
639 - The .page0 is a data section that is mapped in [0x0000..0x00FF].
640 Page0 accesses are faster on the M68HC12.
641 - The .vectors is the section that represents the interrupt
642 vectors. */
643 static const struct bfd_elf_special_section elf32_m68hc12_special_sections[] =
644 {
645 { STRING_COMMA_LEN (".eeprom"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
646 { STRING_COMMA_LEN (".page0"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
647 { STRING_COMMA_LEN (".softregs"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
648 { STRING_COMMA_LEN (".vectors"), 0, SHT_PROGBITS, SHF_ALLOC },
649 { NULL, 0, 0, 0, 0 }
650 };
651
652 #define ELF_ARCH bfd_arch_m68hc12
653 #define ELF_TARGET_ID M68HC11_ELF_DATA
654 #define ELF_MACHINE_CODE EM_68HC12
655 #define ELF_MAXPAGESIZE 0x1000
656
657 #define TARGET_BIG_SYM m68hc12_elf32_vec
658 #define TARGET_BIG_NAME "elf32-m68hc12"
659
660 #define elf_info_to_howto NULL
661 #define elf_info_to_howto_rel m68hc11_info_to_howto_rel
662 #define elf_backend_check_relocs elf32_m68hc11_check_relocs
663 #define elf_backend_relocate_section elf32_m68hc11_relocate_section
664 #define elf_backend_object_p m68hc12_elf_set_mach_from_flags
665 #define elf_backend_can_gc_sections 1
666 #define elf_backend_special_sections elf32_m68hc12_special_sections
667 #define elf_backend_init_file_header elf32_m68hc11_init_file_header
668 #define elf_backend_add_symbol_hook elf32_m68hc11_add_symbol_hook
669 #define elf_backend_merge_symbol_attribute elf32_m68hc11_merge_symbol_attribute
670
671 #define bfd_elf32_bfd_link_hash_table_create \
672 m68hc12_elf_bfd_link_hash_table_create
673 #define bfd_elf32_bfd_merge_private_bfd_data \
674 _bfd_m68hc11_elf_merge_private_bfd_data
675 #define bfd_elf32_bfd_set_private_flags _bfd_m68hc11_elf_set_private_flags
676 #define bfd_elf32_bfd_print_private_bfd_data \
677 _bfd_m68hc11_elf_print_private_bfd_data
678
679 #include "elf32-target.h"
680