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[binutils-gdb.git] / bfd / elf32-h8300.c
1 /* BFD back-end for Renesas H8/300 ELF binaries.
2 Copyright 1993, 1995, 1998, 1999, 2001, 2002, 2003
3 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20
21 #include "bfd.h"
22 #include "sysdep.h"
23 #include "libbfd.h"
24 #include "elf-bfd.h"
25 #include "elf/h8.h"
26
27 static reloc_howto_type *elf32_h8_reloc_type_lookup
28 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
29 static void elf32_h8_info_to_howto
30 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
31 static void elf32_h8_info_to_howto_rel
32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
33 static unsigned long elf32_h8_mach
34 PARAMS ((flagword));
35 static void elf32_h8_final_write_processing
36 PARAMS ((bfd *, bfd_boolean));
37 static bfd_boolean elf32_h8_object_p
38 PARAMS ((bfd *));
39 static bfd_boolean elf32_h8_merge_private_bfd_data
40 PARAMS ((bfd *, bfd *));
41 static bfd_boolean elf32_h8_relax_section
42 PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *));
43 static bfd_boolean elf32_h8_relax_delete_bytes
44 PARAMS ((bfd *, asection *, bfd_vma, int));
45 static bfd_boolean elf32_h8_symbol_address_p
46 PARAMS ((bfd *, asection *, bfd_vma));
47 static bfd_byte *elf32_h8_get_relocated_section_contents
48 PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
49 bfd_byte *, bfd_boolean, asymbol **));
50 static bfd_reloc_status_type elf32_h8_final_link_relocate
51 PARAMS ((unsigned long, bfd *, bfd *, asection *,
52 bfd_byte *, bfd_vma, bfd_vma, bfd_vma,
53 struct bfd_link_info *, asection *, int));
54 static bfd_boolean elf32_h8_relocate_section
55 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
56 bfd_byte *, Elf_Internal_Rela *,
57 Elf_Internal_Sym *, asection **));
58 static bfd_reloc_status_type special
59 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
60
61 /* This does not include any relocation information, but should be
62 good enough for GDB or objdump to read the file. */
63
64 static reloc_howto_type h8_elf_howto_table[] = {
65 #define R_H8_NONE_X 0
66 HOWTO (R_H8_NONE, /* type */
67 0, /* rightshift */
68 0, /* 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 special, /* special_function */
74 "R_H8_NONE", /* name */
75 FALSE, /* partial_inplace */
76 0, /* src_mask */
77 0, /* dst_mask */
78 FALSE), /* pcrel_offset */
79 #define R_H8_DIR32_X (R_H8_NONE_X + 1)
80 HOWTO (R_H8_DIR32, /* type */
81 0, /* rightshift */
82 2, /* size (0 = byte, 1 = short, 2 = long) */
83 32, /* bitsize */
84 FALSE, /* pc_relative */
85 0, /* bitpos */
86 complain_overflow_dont, /* complain_on_overflow */
87 special, /* special_function */
88 "R_H8_DIR32", /* name */
89 FALSE, /* partial_inplace */
90 0, /* src_mask */
91 0xffffffff, /* dst_mask */
92 FALSE), /* pcrel_offset */
93 #define R_H8_DIR16_X (R_H8_DIR32_X + 1)
94 HOWTO (R_H8_DIR16, /* type */
95 0, /* rightshift */
96 1, /* size (0 = byte, 1 = short, 2 = long) */
97 16, /* bitsize */
98 FALSE, /* pc_relative */
99 0, /* bitpos */
100 complain_overflow_dont, /* complain_on_overflow */
101 special, /* special_function */
102 "R_H8_DIR16", /* name */
103 FALSE, /* partial_inplace */
104 0, /* src_mask */
105 0x0000ffff, /* dst_mask */
106 FALSE), /* pcrel_offset */
107 #define R_H8_DIR8_X (R_H8_DIR16_X + 1)
108 HOWTO (R_H8_DIR8, /* type */
109 0, /* rightshift */
110 0, /* size (0 = byte, 1 = short, 2 = long) */
111 8, /* bitsize */
112 FALSE, /* pc_relative */
113 0, /* bitpos */
114 complain_overflow_dont, /* complain_on_overflow */
115 special, /* special_function */
116 "R_H8_DIR16", /* name */
117 FALSE, /* partial_inplace */
118 0, /* src_mask */
119 0x000000ff, /* dst_mask */
120 FALSE), /* pcrel_offset */
121 #define R_H8_DIR16A8_X (R_H8_DIR8_X + 1)
122 HOWTO (R_H8_DIR16A8, /* type */
123 0, /* rightshift */
124 1, /* size (0 = byte, 1 = short, 2 = long) */
125 16, /* bitsize */
126 FALSE, /* pc_relative */
127 0, /* bitpos */
128 complain_overflow_bitfield, /* complain_on_overflow */
129 special, /* special_function */
130 "R_H8_DIR16A8", /* name */
131 FALSE, /* partial_inplace */
132 0, /* src_mask */
133 0x0000ffff, /* dst_mask */
134 FALSE), /* pcrel_offset */
135 #define R_H8_DIR16R8_X (R_H8_DIR16A8_X + 1)
136 HOWTO (R_H8_DIR16R8, /* type */
137 0, /* rightshift */
138 1, /* size (0 = byte, 1 = short, 2 = long) */
139 16, /* bitsize */
140 FALSE, /* pc_relative */
141 0, /* bitpos */
142 complain_overflow_bitfield, /* complain_on_overflow */
143 special, /* special_function */
144 "R_H8_DIR16R8", /* name */
145 FALSE, /* partial_inplace */
146 0, /* src_mask */
147 0x0000ffff, /* dst_mask */
148 FALSE), /* pcrel_offset */
149 #define R_H8_DIR24A8_X (R_H8_DIR16R8_X + 1)
150 HOWTO (R_H8_DIR24A8, /* type */
151 0, /* rightshift */
152 2, /* size (0 = byte, 1 = short, 2 = long) */
153 24, /* bitsize */
154 FALSE, /* pc_relative */
155 0, /* bitpos */
156 complain_overflow_bitfield, /* complain_on_overflow */
157 special, /* special_function */
158 "R_H8_DIR24A8", /* name */
159 TRUE, /* partial_inplace */
160 0xff000000, /* src_mask */
161 0x00ffffff, /* dst_mask */
162 FALSE), /* pcrel_offset */
163 #define R_H8_DIR24R8_X (R_H8_DIR24A8_X + 1)
164 HOWTO (R_H8_DIR24R8, /* type */
165 0, /* rightshift */
166 2, /* size (0 = byte, 1 = short, 2 = long) */
167 24, /* bitsize */
168 FALSE, /* pc_relative */
169 0, /* bitpos */
170 complain_overflow_bitfield, /* complain_on_overflow */
171 special, /* special_function */
172 "R_H8_DIR24R8", /* name */
173 TRUE, /* partial_inplace */
174 0xff000000, /* src_mask */
175 0x00ffffff, /* dst_mask */
176 FALSE), /* pcrel_offset */
177 #define R_H8_DIR32A16_X (R_H8_DIR24R8_X + 1)
178 HOWTO (R_H8_DIR32A16, /* type */
179 0, /* rightshift */
180 2, /* size (0 = byte, 1 = short, 2 = long) */
181 32, /* bitsize */
182 FALSE, /* pc_relative */
183 0, /* bitpos */
184 complain_overflow_dont, /* complain_on_overflow */
185 special, /* special_function */
186 "R_H8_DIR32", /* name */
187 FALSE, /* partial_inplace */
188 0, /* src_mask */
189 0xffffffff, /* dst_mask */
190 FALSE), /* pcrel_offset */
191 #define R_H8_PCREL16_X (R_H8_DIR32A16_X + 1)
192 HOWTO (R_H8_PCREL16, /* type */
193 0, /* rightshift */
194 1, /* size (0 = byte, 1 = short, 2 = long) */
195 16, /* bitsize */
196 TRUE, /* pc_relative */
197 0, /* bitpos */
198 complain_overflow_signed, /* complain_on_overflow */
199 special, /* special_function */
200 "R_H8_PCREL16", /* name */
201 FALSE, /* partial_inplace */
202 0xffff, /* src_mask */
203 0xffff, /* dst_mask */
204 TRUE), /* pcrel_offset */
205 #define R_H8_PCREL8_X (R_H8_PCREL16_X + 1)
206 HOWTO (R_H8_PCREL8, /* type */
207 0, /* rightshift */
208 0, /* size (0 = byte, 1 = short, 2 = long) */
209 8, /* bitsize */
210 TRUE, /* pc_relative */
211 0, /* bitpos */
212 complain_overflow_signed, /* complain_on_overflow */
213 special, /* special_function */
214 "R_H8_PCREL8", /* name */
215 FALSE, /* partial_inplace */
216 0xff, /* src_mask */
217 0xff, /* dst_mask */
218 TRUE), /* pcrel_offset */
219 };
220
221 /* This structure is used to map BFD reloc codes to H8 ELF relocs. */
222
223 struct elf_reloc_map {
224 bfd_reloc_code_real_type bfd_reloc_val;
225 unsigned char howto_index;
226 };
227
228 /* An array mapping BFD reloc codes to SH ELF relocs. */
229
230 static const struct elf_reloc_map h8_reloc_map[] = {
231 { BFD_RELOC_NONE, R_H8_NONE_X },
232 { BFD_RELOC_32, R_H8_DIR32_X },
233 { BFD_RELOC_16, R_H8_DIR16_X },
234 { BFD_RELOC_8, R_H8_DIR8_X },
235 { BFD_RELOC_H8_DIR16A8, R_H8_DIR16A8_X },
236 { BFD_RELOC_H8_DIR16R8, R_H8_DIR16R8_X },
237 { BFD_RELOC_H8_DIR24A8, R_H8_DIR24A8_X },
238 { BFD_RELOC_H8_DIR24R8, R_H8_DIR24R8_X },
239 { BFD_RELOC_H8_DIR32A16, R_H8_DIR32A16_X },
240 { BFD_RELOC_16_PCREL, R_H8_PCREL16_X },
241 { BFD_RELOC_8_PCREL, R_H8_PCREL8_X },
242 };
243
244
245 static reloc_howto_type *
246 elf32_h8_reloc_type_lookup (abfd, code)
247 bfd *abfd ATTRIBUTE_UNUSED;
248 bfd_reloc_code_real_type code;
249 {
250 unsigned int i;
251
252 for (i = 0; i < sizeof (h8_reloc_map) / sizeof (struct elf_reloc_map); i++)
253 {
254 if (h8_reloc_map[i].bfd_reloc_val == code)
255 return &h8_elf_howto_table[(int) h8_reloc_map[i].howto_index];
256 }
257 return NULL;
258 }
259
260 static void
261 elf32_h8_info_to_howto (abfd, bfd_reloc, elf_reloc)
262 bfd *abfd ATTRIBUTE_UNUSED;
263 arelent *bfd_reloc;
264 Elf_Internal_Rela *elf_reloc;
265 {
266 unsigned int r;
267 unsigned int i;
268
269 r = ELF32_R_TYPE (elf_reloc->r_info);
270 for (i = 0; i < sizeof (h8_elf_howto_table) / sizeof (reloc_howto_type); i++)
271 if (h8_elf_howto_table[i].type == r)
272 {
273 bfd_reloc->howto = &h8_elf_howto_table[i];
274 return;
275 }
276 abort ();
277 }
278
279 static void
280 elf32_h8_info_to_howto_rel (abfd, bfd_reloc, elf_reloc)
281 bfd *abfd ATTRIBUTE_UNUSED;
282 arelent *bfd_reloc;
283 Elf_Internal_Rela *elf_reloc ATTRIBUTE_UNUSED;
284 {
285 unsigned int r;
286
287 abort ();
288 r = ELF32_R_TYPE (elf_reloc->r_info);
289 bfd_reloc->howto = &h8_elf_howto_table[r];
290 }
291
292 /* Special handling for H8/300 relocs.
293 We only come here for pcrel stuff and return normally if not an -r link.
294 When doing -r, we can't do any arithmetic for the pcrel stuff, because
295 we support relaxing on the H8/300 series chips. */
296 static bfd_reloc_status_type
297 special (abfd, reloc_entry, symbol, data, input_section, output_bfd,
298 error_message)
299 bfd *abfd ATTRIBUTE_UNUSED;
300 arelent *reloc_entry ATTRIBUTE_UNUSED;
301 asymbol *symbol ATTRIBUTE_UNUSED;
302 PTR data ATTRIBUTE_UNUSED;
303 asection *input_section ATTRIBUTE_UNUSED;
304 bfd *output_bfd;
305 char **error_message ATTRIBUTE_UNUSED;
306 {
307 if (output_bfd == (bfd *) NULL)
308 return bfd_reloc_continue;
309
310 /* Adjust the reloc address to that in the output section. */
311 reloc_entry->address += input_section->output_offset;
312 return bfd_reloc_ok;
313 }
314
315 /* Perform a relocation as part of a final link. */
316 static bfd_reloc_status_type
317 elf32_h8_final_link_relocate (r_type, input_bfd, output_bfd,
318 input_section, contents, offset, value,
319 addend, info, sym_sec, is_local)
320 unsigned long r_type;
321 bfd *input_bfd;
322 bfd *output_bfd ATTRIBUTE_UNUSED;
323 asection *input_section ATTRIBUTE_UNUSED;
324 bfd_byte *contents;
325 bfd_vma offset;
326 bfd_vma value;
327 bfd_vma addend;
328 struct bfd_link_info *info ATTRIBUTE_UNUSED;
329 asection *sym_sec ATTRIBUTE_UNUSED;
330 int is_local ATTRIBUTE_UNUSED;
331 {
332 bfd_byte *hit_data = contents + offset;
333
334 switch (r_type)
335 {
336
337 case R_H8_NONE:
338 return bfd_reloc_ok;
339
340 case R_H8_DIR32:
341 case R_H8_DIR32A16:
342 case R_H8_DIR24A8:
343 value += addend;
344 bfd_put_32 (input_bfd, value, hit_data);
345 return bfd_reloc_ok;
346
347 case R_H8_DIR16:
348 case R_H8_DIR16A8:
349 case R_H8_DIR16R8:
350 value += addend;
351 bfd_put_16 (input_bfd, value, hit_data);
352 return bfd_reloc_ok;
353
354 /* AKA R_RELBYTE */
355 case R_H8_DIR8:
356 value += addend;
357
358 bfd_put_8 (input_bfd, value, hit_data);
359 return bfd_reloc_ok;
360
361 case R_H8_DIR24R8:
362 value += addend;
363
364 /* HIT_DATA is the address for the first byte for the relocated
365 value. Subtract 1 so that we can manipulate the data in 32bit
366 hunks. */
367 hit_data--;
368
369 /* Clear out the top byte in value. */
370 value &= 0xffffff;
371
372 /* Retrieve the type byte for value from the section contents. */
373 value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000);
374
375 /* Now scribble it out in one 32bit hunk. */
376 bfd_put_32 (input_bfd, value, hit_data);
377 return bfd_reloc_ok;
378
379 case R_H8_PCREL16:
380 value -= (input_section->output_section->vma
381 + input_section->output_offset);
382 value -= offset;
383 value += addend;
384
385 /* The value is relative to the start of the instruction,
386 not the relocation offset. Subtract 2 to account for
387 this minor issue. */
388 value -= 2;
389
390 bfd_put_16 (input_bfd, value, hit_data);
391 return bfd_reloc_ok;
392
393 case R_H8_PCREL8:
394 value -= (input_section->output_section->vma
395 + input_section->output_offset);
396 value -= offset;
397 value += addend;
398
399 /* The value is relative to the start of the instruction,
400 not the relocation offset. Subtract 1 to account for
401 this minor issue. */
402 value -= 1;
403
404 bfd_put_8 (input_bfd, value, hit_data);
405 return bfd_reloc_ok;
406
407 default:
408 return bfd_reloc_notsupported;
409 }
410 }
411 \f
412 /* Relocate an H8 ELF section. */
413 static bfd_boolean
414 elf32_h8_relocate_section (output_bfd, info, input_bfd, input_section,
415 contents, relocs, local_syms, local_sections)
416 bfd *output_bfd;
417 struct bfd_link_info *info;
418 bfd *input_bfd;
419 asection *input_section;
420 bfd_byte *contents;
421 Elf_Internal_Rela *relocs;
422 Elf_Internal_Sym *local_syms;
423 asection **local_sections;
424 {
425 Elf_Internal_Shdr *symtab_hdr;
426 struct elf_link_hash_entry **sym_hashes;
427 Elf_Internal_Rela *rel, *relend;
428
429 if (info->relocateable)
430 return TRUE;
431
432 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
433 sym_hashes = elf_sym_hashes (input_bfd);
434
435 rel = relocs;
436 relend = relocs + input_section->reloc_count;
437 for (; rel < relend; rel++)
438 {
439 unsigned int r_type;
440 unsigned long r_symndx;
441 Elf_Internal_Sym *sym;
442 asection *sec;
443 struct elf_link_hash_entry *h;
444 bfd_vma relocation;
445 bfd_reloc_status_type r;
446
447 /* This is a final link. */
448 r_symndx = ELF32_R_SYM (rel->r_info);
449 r_type = ELF32_R_TYPE (rel->r_info);
450 h = NULL;
451 sym = NULL;
452 sec = NULL;
453 if (r_symndx < symtab_hdr->sh_info)
454 {
455 sym = local_syms + r_symndx;
456 sec = local_sections[r_symndx];
457 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
458 }
459 else
460 {
461 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
462 while (h->root.type == bfd_link_hash_indirect
463 || h->root.type == bfd_link_hash_warning)
464 h = (struct elf_link_hash_entry *) h->root.u.i.link;
465 if (h->root.type == bfd_link_hash_defined
466 || h->root.type == bfd_link_hash_defweak)
467 {
468 sec = h->root.u.def.section;
469 relocation = (h->root.u.def.value
470 + sec->output_section->vma
471 + sec->output_offset);
472 }
473 else if (h->root.type == bfd_link_hash_undefweak)
474 relocation = 0;
475 else
476 {
477 if (! ((*info->callbacks->undefined_symbol)
478 (info, h->root.root.string, input_bfd,
479 input_section, rel->r_offset, TRUE)))
480 return FALSE;
481 relocation = 0;
482 }
483 }
484
485 r = elf32_h8_final_link_relocate (r_type, input_bfd, output_bfd,
486 input_section,
487 contents, rel->r_offset,
488 relocation, rel->r_addend,
489 info, sec, h == NULL);
490
491 if (r != bfd_reloc_ok)
492 {
493 const char *name;
494 const char *msg = (const char *) 0;
495 arelent bfd_reloc;
496 reloc_howto_type *howto;
497
498 elf32_h8_info_to_howto (input_bfd, &bfd_reloc, rel);
499 howto = bfd_reloc.howto;
500
501 if (h != NULL)
502 name = h->root.root.string;
503 else
504 {
505 name = (bfd_elf_string_from_elf_section
506 (input_bfd, symtab_hdr->sh_link, sym->st_name));
507 if (name == NULL || *name == '\0')
508 name = bfd_section_name (input_bfd, sec);
509 }
510
511 switch (r)
512 {
513 case bfd_reloc_overflow:
514 if (! ((*info->callbacks->reloc_overflow)
515 (info, name, howto->name, (bfd_vma) 0,
516 input_bfd, input_section, rel->r_offset)))
517 return FALSE;
518 break;
519
520 case bfd_reloc_undefined:
521 if (! ((*info->callbacks->undefined_symbol)
522 (info, name, input_bfd, input_section,
523 rel->r_offset, TRUE)))
524 return FALSE;
525 break;
526
527 case bfd_reloc_outofrange:
528 msg = _("internal error: out of range error");
529 goto common_error;
530
531 case bfd_reloc_notsupported:
532 msg = _("internal error: unsupported relocation error");
533 goto common_error;
534
535 case bfd_reloc_dangerous:
536 msg = _("internal error: dangerous error");
537 goto common_error;
538
539 default:
540 msg = _("internal error: unknown error");
541 /* fall through */
542
543 common_error:
544 if (!((*info->callbacks->warning)
545 (info, msg, name, input_bfd, input_section,
546 rel->r_offset)))
547 return FALSE;
548 break;
549 }
550 }
551 }
552
553 return TRUE;
554 }
555
556 /* Object files encode the specific H8 model they were compiled
557 for in the ELF flags field.
558
559 Examine that field and return the proper BFD machine type for
560 the object file. */
561 static unsigned long
562 elf32_h8_mach (flags)
563 flagword flags;
564 {
565 switch (flags & EF_H8_MACH)
566 {
567 case E_H8_MACH_H8300:
568 default:
569 return bfd_mach_h8300;
570
571 case E_H8_MACH_H8300H:
572 return bfd_mach_h8300h;
573
574 case E_H8_MACH_H8300S:
575 return bfd_mach_h8300s;
576
577 case E_H8_MACH_H8300HN:
578 return bfd_mach_h8300hn;
579
580 case E_H8_MACH_H8300SN:
581 return bfd_mach_h8300sn;
582 }
583 }
584
585 /* The final processing done just before writing out a H8 ELF object
586 file. We use this opportunity to encode the BFD machine type
587 into the flags field in the object file. */
588
589 static void
590 elf32_h8_final_write_processing (abfd, linker)
591 bfd *abfd;
592 bfd_boolean linker ATTRIBUTE_UNUSED;
593 {
594 unsigned long val;
595
596 switch (bfd_get_mach (abfd))
597 {
598 default:
599 case bfd_mach_h8300:
600 val = E_H8_MACH_H8300;
601 break;
602
603 case bfd_mach_h8300h:
604 val = E_H8_MACH_H8300H;
605 break;
606
607 case bfd_mach_h8300s:
608 val = E_H8_MACH_H8300S;
609 break;
610
611 case bfd_mach_h8300hn:
612 val = E_H8_MACH_H8300HN;
613 break;
614
615 case bfd_mach_h8300sn:
616 val = E_H8_MACH_H8300SN;
617 break;
618 }
619
620 elf_elfheader (abfd)->e_flags &= ~ (EF_H8_MACH);
621 elf_elfheader (abfd)->e_flags |= val;
622 }
623
624 /* Return nonzero if ABFD represents a valid H8 ELF object file; also
625 record the encoded machine type found in the ELF flags. */
626
627 static bfd_boolean
628 elf32_h8_object_p (abfd)
629 bfd *abfd;
630 {
631 bfd_default_set_arch_mach (abfd, bfd_arch_h8300,
632 elf32_h8_mach (elf_elfheader (abfd)->e_flags));
633 return TRUE;
634 }
635
636 /* Merge backend specific data from an object file to the output
637 object file when linking. The only data we need to copy at this
638 time is the architecture/machine information. */
639
640 static bfd_boolean
641 elf32_h8_merge_private_bfd_data (ibfd, obfd)
642 bfd *ibfd;
643 bfd *obfd;
644 {
645 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
646 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
647 return TRUE;
648
649 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
650 && bfd_get_mach (obfd) < bfd_get_mach (ibfd))
651 {
652 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
653 bfd_get_mach (ibfd)))
654 return FALSE;
655 }
656
657 return TRUE;
658 }
659
660 /* This function handles relaxing for the H8..
661
662 There's a few relaxing opportunites available on the H8:
663
664 jmp/jsr:24 -> bra/bsr:8 2 bytes
665 The jmp may be completely eliminated if the previous insn is a
666 conditional branch to the insn after the jump. In that case
667 we invert the branch and delete the jump and save 4 bytes.
668
669 bCC:16 -> bCC:8 2 bytes
670 bsr:16 -> bsr:8 2 bytes
671
672 mov.b:16 -> mov.b:8 2 bytes
673 mov.b:24/32 -> mov.b:8 4 bytes
674
675 mov.[bwl]:24/32 -> mov.[bwl]:16 2 bytes */
676
677 static bfd_boolean
678 elf32_h8_relax_section (abfd, sec, link_info, again)
679 bfd *abfd;
680 asection *sec;
681 struct bfd_link_info *link_info;
682 bfd_boolean *again;
683 {
684 Elf_Internal_Shdr *symtab_hdr;
685 Elf_Internal_Rela *internal_relocs;
686 Elf_Internal_Rela *irel, *irelend;
687 bfd_byte *contents = NULL;
688 Elf_Internal_Sym *isymbuf = NULL;
689 static asection *last_input_section = NULL;
690 static Elf_Internal_Rela *last_reloc = NULL;
691
692 /* Assume nothing changes. */
693 *again = FALSE;
694
695 /* We don't have to do anything for a relocateable link, if
696 this section does not have relocs, or if this is not a
697 code section. */
698 if (link_info->relocateable
699 || (sec->flags & SEC_RELOC) == 0
700 || sec->reloc_count == 0
701 || (sec->flags & SEC_CODE) == 0)
702 return TRUE;
703
704 /* If this is the first time we have been called for this section,
705 initialize the cooked size. */
706 if (sec->_cooked_size == 0)
707 sec->_cooked_size = sec->_raw_size;
708
709 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
710
711 /* Get a copy of the native relocations. */
712 internal_relocs = (_bfd_elf32_link_read_relocs
713 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
714 link_info->keep_memory));
715 if (internal_relocs == NULL)
716 goto error_return;
717
718 if (sec != last_input_section)
719 last_reloc = NULL;
720
721 last_input_section = sec;
722
723 /* Walk through the relocs looking for relaxing opportunities. */
724 irelend = internal_relocs + sec->reloc_count;
725 for (irel = internal_relocs; irel < irelend; irel++)
726 {
727 bfd_vma symval;
728
729 /* Keep track of the previous reloc so that we can delete
730 some long jumps created by the compiler. */
731 if (irel != internal_relocs)
732 last_reloc = irel - 1;
733
734 if (ELF32_R_TYPE (irel->r_info) != R_H8_DIR24R8
735 && ELF32_R_TYPE (irel->r_info) != R_H8_PCREL16
736 && ELF32_R_TYPE (irel->r_info) != R_H8_DIR16A8
737 && ELF32_R_TYPE (irel->r_info) != R_H8_DIR24A8
738 && ELF32_R_TYPE (irel->r_info) != R_H8_DIR32A16)
739 continue;
740
741 /* Get the section contents if we haven't done so already. */
742 if (contents == NULL)
743 {
744 /* Get cached copy if it exists. */
745 if (elf_section_data (sec)->this_hdr.contents != NULL)
746 contents = elf_section_data (sec)->this_hdr.contents;
747 else
748 {
749 /* Go get them off disk. */
750 contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
751 if (contents == NULL)
752 goto error_return;
753
754 if (! bfd_get_section_contents (abfd, sec, contents,
755 (file_ptr) 0, sec->_raw_size))
756 goto error_return;
757 }
758 }
759
760 /* Read this BFD's local symbols if we haven't done so already. */
761 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
762 {
763 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
764 if (isymbuf == NULL)
765 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
766 symtab_hdr->sh_info, 0,
767 NULL, NULL, NULL);
768 if (isymbuf == NULL)
769 goto error_return;
770 }
771
772 /* Get the value of the symbol referred to by the reloc. */
773 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
774 {
775 /* A local symbol. */
776 Elf_Internal_Sym *isym;
777 asection *sym_sec;
778
779 isym = isymbuf + ELF32_R_SYM (irel->r_info);
780 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
781 symval = (isym->st_value
782 + sym_sec->output_section->vma
783 + sym_sec->output_offset);
784 }
785 else
786 {
787 unsigned long indx;
788 struct elf_link_hash_entry *h;
789
790 /* An external symbol. */
791 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
792 h = elf_sym_hashes (abfd)[indx];
793 BFD_ASSERT (h != NULL);
794 if (h->root.type != bfd_link_hash_defined
795 && h->root.type != bfd_link_hash_defweak)
796 {
797 /* This appears to be a reference to an undefined
798 symbol. Just ignore it--it will be caught by the
799 regular reloc processing. */
800 continue;
801 }
802
803 symval = (h->root.u.def.value
804 + h->root.u.def.section->output_section->vma
805 + h->root.u.def.section->output_offset);
806 }
807
808 /* For simplicity of coding, we are going to modify the section
809 contents, the section relocs, and the BFD symbol table. We
810 must tell the rest of the code not to free up this
811 information. It would be possible to instead create a table
812 of changes which have to be made, as is done in coff-mips.c;
813 that would be more work, but would require less memory when
814 the linker is run. */
815 switch (ELF32_R_TYPE (irel->r_info))
816 {
817 /* Try to turn a 24 bit absolute branch/call into an 8 bit
818 pc-relative branch/call. */
819 case R_H8_DIR24R8:
820 {
821 bfd_vma value = symval + irel->r_addend;
822 bfd_vma dot, gap;
823
824 /* Get the address of this instruction. */
825 dot = (sec->output_section->vma
826 + sec->output_offset + irel->r_offset - 1);
827
828 /* Compute the distance from this insn to the branch target. */
829 gap = value - dot;
830
831 /* If the distance is within -126..+130 inclusive, then we can
832 relax this jump. +130 is valid since the target will move
833 two bytes closer if we do relax this branch. */
834 if ((int) gap >= -126 && (int) gap <= 130)
835 {
836 unsigned char code;
837
838 /* Note that we've changed the relocs, section contents,
839 etc. */
840 elf_section_data (sec)->relocs = internal_relocs;
841 elf_section_data (sec)->this_hdr.contents = contents;
842 symtab_hdr->contents = (unsigned char *) isymbuf;
843
844 /* Get the instruction code being relaxed. */
845 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
846
847 /* If the previous instruction conditionally jumped around
848 this instruction, we may be able to reverse the condition
849 and redirect the previous instruction to the target of
850 this instruction.
851
852 Such sequences are used by the compiler to deal with
853 long conditional branches.
854
855 Only perform this optimisation for jumps (code 0x5a) not
856 subroutine calls, as otherwise it could transform:
857
858 mov.w r0,r0
859 beq .L1
860 jsr @_bar
861 .L1: rts
862 _bar: rts
863 into:
864 mov.w r0,r0
865 bne _bar
866 rts
867 _bar: rts
868
869 which changes the call (jsr) into a branch (bne). */
870 if (code == 0x5a
871 && (int) gap <= 130
872 && (int) gap >= -128
873 && last_reloc
874 && ELF32_R_TYPE (last_reloc->r_info) == R_H8_PCREL8
875 && ELF32_R_SYM (last_reloc->r_info) < symtab_hdr->sh_info)
876 {
877 bfd_vma last_value;
878 asection *last_sym_sec;
879 Elf_Internal_Sym *last_sym;
880
881 /* We will need to examine the symbol used by the
882 previous relocation. */
883
884 last_sym = isymbuf + ELF32_R_SYM (last_reloc->r_info);
885 last_sym_sec
886 = bfd_section_from_elf_index (abfd, last_sym->st_shndx);
887 last_value = (last_sym->st_value
888 + last_sym_sec->output_section->vma
889 + last_sym_sec->output_offset);
890
891 /* Verify that the previous relocation was for a
892 branch around this instruction and that no symbol
893 exists at the current location. */
894 if (last_value == dot + 4
895 && last_reloc->r_offset + 2 == irel->r_offset
896 && ! elf32_h8_symbol_address_p (abfd, sec, dot))
897 {
898 /* We can eliminate this jump. Twiddle the
899 previous relocation as necessary. */
900 irel->r_info
901 = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
902 ELF32_R_TYPE (R_H8_NONE));
903
904 last_reloc->r_info
905 = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
906 ELF32_R_TYPE (R_H8_PCREL8));
907 last_reloc->r_addend = irel->r_addend;
908
909 code = bfd_get_8 (abfd,
910 contents + last_reloc->r_offset - 1);
911 code ^= 1;
912 bfd_put_8 (abfd,
913 code,
914 contents + last_reloc->r_offset - 1);
915
916 /* Delete four bytes of data. */
917 if (!elf32_h8_relax_delete_bytes (abfd, sec,
918 irel->r_offset - 1,
919 4))
920 goto error_return;
921
922 *again = TRUE;
923 break;
924 }
925 }
926
927 if (code == 0x5e)
928 bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 1);
929 else if (code == 0x5a)
930 bfd_put_8 (abfd, 0x40, contents + irel->r_offset - 1);
931 else
932 abort ();
933
934 /* Fix the relocation's type. */
935 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
936 R_H8_PCREL8);
937
938 /* Delete two bytes of data. */
939 if (!elf32_h8_relax_delete_bytes (abfd, sec,
940 irel->r_offset + 1, 2))
941 goto error_return;
942
943 /* That will change things, so, we should relax again.
944 Note that this is not required, and it may be slow. */
945 *again = TRUE;
946 }
947 break;
948 }
949
950 /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative
951 branch. */
952 case R_H8_PCREL16:
953 {
954 bfd_vma value = symval + irel->r_addend;
955 bfd_vma dot;
956 bfd_vma gap;
957
958 /* Get the address of this instruction. */
959 dot = (sec->output_section->vma
960 + sec->output_offset
961 + irel->r_offset - 2);
962
963 gap = value - dot;
964
965 /* If the distance is within -126..+130 inclusive, then we can
966 relax this jump. +130 is valid since the target will move
967 two bytes closer if we do relax this branch. */
968 if ((int) gap >= -126 && (int) gap <= 130)
969 {
970 unsigned char code;
971
972 /* Note that we've changed the relocs, section contents,
973 etc. */
974 elf_section_data (sec)->relocs = internal_relocs;
975 elf_section_data (sec)->this_hdr.contents = contents;
976 symtab_hdr->contents = (unsigned char *) isymbuf;
977
978 /* Get the opcode. */
979 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
980
981 if (code == 0x58)
982 {
983 /* bCC:16 -> bCC:8 */
984 /* Get the condition code from the original insn. */
985 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
986 code &= 0xf0;
987 code >>= 4;
988 code |= 0x40;
989 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
990 }
991 else if (code == 0x5c)
992 bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 2);
993 else
994 abort ();
995
996 /* Fix the relocation's type. */
997 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
998 R_H8_PCREL8);
999 irel->r_offset--;
1000
1001 /* Delete two bytes of data. */
1002 if (!elf32_h8_relax_delete_bytes (abfd, sec,
1003 irel->r_offset + 1, 2))
1004 goto error_return;
1005
1006 /* That will change things, so, we should relax again.
1007 Note that this is not required, and it may be slow. */
1008 *again = TRUE;
1009 }
1010 break;
1011 }
1012
1013 /* This is a 16 bit absolute address in a "mov.b" insn, which may
1014 become an 8 bit absolute address if its in the right range. */
1015 case R_H8_DIR16A8:
1016 {
1017 bfd_vma value = symval + irel->r_addend;
1018
1019 if ((bfd_get_mach (abfd) == bfd_mach_h8300
1020 && value >= 0xff00
1021 && value <= 0xffff)
1022 || ((bfd_get_mach (abfd) == bfd_mach_h8300h
1023 || bfd_get_mach (abfd) == bfd_mach_h8300s)
1024 && value >= 0xffff00
1025 && value <= 0xffffff))
1026 {
1027 unsigned char code;
1028
1029 /* Note that we've changed the relocs, section contents,
1030 etc. */
1031 elf_section_data (sec)->relocs = internal_relocs;
1032 elf_section_data (sec)->this_hdr.contents = contents;
1033 symtab_hdr->contents = (unsigned char *) isymbuf;
1034
1035 /* Get the opcode. */
1036 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
1037
1038 /* Sanity check. */
1039 if (code != 0x6a)
1040 abort ();
1041
1042 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
1043
1044 if ((code & 0xf0) == 0x00)
1045 bfd_put_8 (abfd,
1046 (code & 0xf) | 0x20,
1047 contents + irel->r_offset - 2);
1048 else if ((code & 0xf0) == 0x80)
1049 bfd_put_8 (abfd,
1050 (code & 0xf) | 0x30,
1051 contents + irel->r_offset - 2);
1052 else
1053 abort ();
1054
1055 /* Fix the relocation's type. */
1056 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1057 R_H8_DIR8);
1058
1059 /* Delete two bytes of data. */
1060 if (!elf32_h8_relax_delete_bytes (abfd, sec,
1061 irel->r_offset + 1, 2))
1062 goto error_return;
1063
1064 /* That will change things, so, we should relax again.
1065 Note that this is not required, and it may be slow. */
1066 *again = TRUE;
1067 }
1068 break;
1069 }
1070
1071 /* This is a 24 bit absolute address in a "mov.b" insn, which may
1072 become an 8 bit absolute address if its in the right range. */
1073 case R_H8_DIR24A8:
1074 {
1075 bfd_vma value = symval + irel->r_addend;
1076
1077 if ((bfd_get_mach (abfd) == bfd_mach_h8300
1078 && value >= 0xff00
1079 && value <= 0xffff)
1080 || ((bfd_get_mach (abfd) == bfd_mach_h8300h
1081 || bfd_get_mach (abfd) == bfd_mach_h8300s)
1082 && value >= 0xffff00
1083 && value <= 0xffffff))
1084 {
1085 unsigned char code;
1086
1087 /* Note that we've changed the relocs, section contents,
1088 etc. */
1089 elf_section_data (sec)->relocs = internal_relocs;
1090 elf_section_data (sec)->this_hdr.contents = contents;
1091 symtab_hdr->contents = (unsigned char *) isymbuf;
1092
1093 /* Get the opcode. */
1094 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
1095
1096 /* Sanity check. */
1097 if (code != 0x6a)
1098 abort ();
1099
1100 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
1101
1102 if ((code & 0xf0) == 0x00)
1103 bfd_put_8 (abfd,
1104 (code & 0xf) | 0x20,
1105 contents + irel->r_offset - 2);
1106 else if ((code & 0xf0) == 0x80)
1107 bfd_put_8 (abfd,
1108 (code & 0xf) | 0x30,
1109 contents + irel->r_offset - 2);
1110 else
1111 abort ();
1112
1113 /* Fix the relocation's type. */
1114 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1115 R_H8_DIR8);
1116
1117 /* Delete two bytes of data. */
1118 if (!elf32_h8_relax_delete_bytes (abfd, sec, irel->r_offset, 2))
1119 goto error_return;
1120
1121 /* That will change things, so, we should relax again.
1122 Note that this is not required, and it may be slow. */
1123 *again = TRUE;
1124 }
1125 }
1126
1127 /* FALLTHRU */
1128
1129 /* This is a 24/32bit absolute address in a "mov" insn, which may
1130 become a 16bit absoulte address if it is in the right range. */
1131 case R_H8_DIR32A16:
1132 {
1133 bfd_vma value = symval + irel->r_addend;
1134
1135 if (value <= 0x7fff || value >= 0xff8000)
1136 {
1137 unsigned char code;
1138
1139 /* Note that we've changed the relocs, section contents,
1140 etc. */
1141 elf_section_data (sec)->relocs = internal_relocs;
1142 elf_section_data (sec)->this_hdr.contents = contents;
1143 symtab_hdr->contents = (unsigned char *) isymbuf;
1144
1145 /* Get the opcode. */
1146 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
1147
1148 /* We just need to turn off bit 0x20. */
1149 code &= ~0x20;
1150
1151 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
1152
1153 /* Fix the relocation's type. */
1154 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1155 R_H8_DIR16A8);
1156
1157 /* Delete two bytes of data. */
1158 if (!elf32_h8_relax_delete_bytes (abfd, sec,
1159 irel->r_offset + 1, 2))
1160 goto error_return;
1161
1162 /* That will change things, so, we should relax again.
1163 Note that this is not required, and it may be slow. */
1164 *again = TRUE;
1165 }
1166 break;
1167 }
1168
1169 default:
1170 break;
1171 }
1172 }
1173
1174 if (isymbuf != NULL
1175 && symtab_hdr->contents != (unsigned char *) isymbuf)
1176 {
1177 if (! link_info->keep_memory)
1178 free (isymbuf);
1179 else
1180 symtab_hdr->contents = (unsigned char *) isymbuf;
1181 }
1182
1183 if (contents != NULL
1184 && elf_section_data (sec)->this_hdr.contents != contents)
1185 {
1186 if (! link_info->keep_memory)
1187 free (contents);
1188 else
1189 {
1190 /* Cache the section contents for elf_link_input_bfd. */
1191 elf_section_data (sec)->this_hdr.contents = contents;
1192 }
1193 }
1194
1195 if (internal_relocs != NULL
1196 && elf_section_data (sec)->relocs != internal_relocs)
1197 free (internal_relocs);
1198
1199 return TRUE;
1200
1201 error_return:
1202 if (isymbuf != NULL
1203 && symtab_hdr->contents != (unsigned char *) isymbuf)
1204 free (isymbuf);
1205 if (contents != NULL
1206 && elf_section_data (sec)->this_hdr.contents != contents)
1207 free (contents);
1208 if (internal_relocs != NULL
1209 && elf_section_data (sec)->relocs != internal_relocs)
1210 free (internal_relocs);
1211 return FALSE;
1212 }
1213
1214 /* Delete some bytes from a section while relaxing. */
1215
1216 static bfd_boolean
1217 elf32_h8_relax_delete_bytes (abfd, sec, addr, count)
1218 bfd *abfd;
1219 asection *sec;
1220 bfd_vma addr;
1221 int count;
1222 {
1223 Elf_Internal_Shdr *symtab_hdr;
1224 unsigned int sec_shndx;
1225 bfd_byte *contents;
1226 Elf_Internal_Rela *irel, *irelend;
1227 Elf_Internal_Rela *irelalign;
1228 Elf_Internal_Sym *isym;
1229 Elf_Internal_Sym *isymend;
1230 bfd_vma toaddr;
1231 struct elf_link_hash_entry **sym_hashes;
1232 struct elf_link_hash_entry **end_hashes;
1233 unsigned int symcount;
1234
1235 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1236
1237 contents = elf_section_data (sec)->this_hdr.contents;
1238
1239 /* The deletion must stop at the next ALIGN reloc for an aligment
1240 power larger than the number of bytes we are deleting. */
1241
1242 irelalign = NULL;
1243 toaddr = sec->_cooked_size;
1244
1245 irel = elf_section_data (sec)->relocs;
1246 irelend = irel + sec->reloc_count;
1247
1248 /* Actually delete the bytes. */
1249 memmove (contents + addr, contents + addr + count,
1250 (size_t) (toaddr - addr - count));
1251 sec->_cooked_size -= count;
1252
1253 /* Adjust all the relocs. */
1254 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
1255 {
1256 /* Get the new reloc address. */
1257 if ((irel->r_offset > addr
1258 && irel->r_offset < toaddr))
1259 irel->r_offset -= count;
1260 }
1261
1262 /* Adjust the local symbols defined in this section. */
1263 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1264 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
1265 isymend = isym + symtab_hdr->sh_info;
1266 for (; isym < isymend; isym++)
1267 {
1268 if (isym->st_shndx == sec_shndx
1269 && isym->st_value > addr
1270 && isym->st_value < toaddr)
1271 isym->st_value -= count;
1272 }
1273
1274 /* Now adjust the global symbols defined in this section. */
1275 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1276 - symtab_hdr->sh_info);
1277 sym_hashes = elf_sym_hashes (abfd);
1278 end_hashes = sym_hashes + symcount;
1279 for (; sym_hashes < end_hashes; sym_hashes++)
1280 {
1281 struct elf_link_hash_entry *sym_hash = *sym_hashes;
1282 if ((sym_hash->root.type == bfd_link_hash_defined
1283 || sym_hash->root.type == bfd_link_hash_defweak)
1284 && sym_hash->root.u.def.section == sec
1285 && sym_hash->root.u.def.value > addr
1286 && sym_hash->root.u.def.value < toaddr)
1287 {
1288 sym_hash->root.u.def.value -= count;
1289 }
1290 }
1291
1292 return TRUE;
1293 }
1294
1295 /* Return TRUE if a symbol exists at the given address, else return
1296 FALSE. */
1297 static bfd_boolean
1298 elf32_h8_symbol_address_p (abfd, sec, addr)
1299 bfd *abfd;
1300 asection *sec;
1301 bfd_vma addr;
1302 {
1303 Elf_Internal_Shdr *symtab_hdr;
1304 unsigned int sec_shndx;
1305 Elf_Internal_Sym *isym;
1306 Elf_Internal_Sym *isymend;
1307 struct elf_link_hash_entry **sym_hashes;
1308 struct elf_link_hash_entry **end_hashes;
1309 unsigned int symcount;
1310
1311 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1312
1313 /* Examine all the symbols. */
1314 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1315 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
1316 isymend = isym + symtab_hdr->sh_info;
1317 for (; isym < isymend; isym++)
1318 {
1319 if (isym->st_shndx == sec_shndx
1320 && isym->st_value == addr)
1321 return TRUE;
1322 }
1323
1324 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1325 - symtab_hdr->sh_info);
1326 sym_hashes = elf_sym_hashes (abfd);
1327 end_hashes = sym_hashes + symcount;
1328 for (; sym_hashes < end_hashes; sym_hashes++)
1329 {
1330 struct elf_link_hash_entry *sym_hash = *sym_hashes;
1331 if ((sym_hash->root.type == bfd_link_hash_defined
1332 || sym_hash->root.type == bfd_link_hash_defweak)
1333 && sym_hash->root.u.def.section == sec
1334 && sym_hash->root.u.def.value == addr)
1335 return TRUE;
1336 }
1337
1338 return FALSE;
1339 }
1340
1341 /* This is a version of bfd_generic_get_relocated_section_contents
1342 which uses elf32_h8_relocate_section. */
1343
1344 static bfd_byte *
1345 elf32_h8_get_relocated_section_contents (output_bfd, link_info, link_order,
1346 data, relocateable, symbols)
1347 bfd *output_bfd;
1348 struct bfd_link_info *link_info;
1349 struct bfd_link_order *link_order;
1350 bfd_byte *data;
1351 bfd_boolean relocateable;
1352 asymbol **symbols;
1353 {
1354 Elf_Internal_Shdr *symtab_hdr;
1355 asection *input_section = link_order->u.indirect.section;
1356 bfd *input_bfd = input_section->owner;
1357 asection **sections = NULL;
1358 Elf_Internal_Rela *internal_relocs = NULL;
1359 Elf_Internal_Sym *isymbuf = NULL;
1360
1361 /* We only need to handle the case of relaxing, or of having a
1362 particular set of section contents, specially. */
1363 if (relocateable
1364 || elf_section_data (input_section)->this_hdr.contents == NULL)
1365 return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
1366 link_order, data,
1367 relocateable,
1368 symbols);
1369
1370 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1371
1372 memcpy (data, elf_section_data (input_section)->this_hdr.contents,
1373 (size_t) input_section->_raw_size);
1374
1375 if ((input_section->flags & SEC_RELOC) != 0
1376 && input_section->reloc_count > 0)
1377 {
1378 asection **secpp;
1379 Elf_Internal_Sym *isym, *isymend;
1380 bfd_size_type amt;
1381
1382 internal_relocs = (_bfd_elf32_link_read_relocs
1383 (input_bfd, input_section, (PTR) NULL,
1384 (Elf_Internal_Rela *) NULL, FALSE));
1385 if (internal_relocs == NULL)
1386 goto error_return;
1387
1388 if (symtab_hdr->sh_info != 0)
1389 {
1390 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1391 if (isymbuf == NULL)
1392 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1393 symtab_hdr->sh_info, 0,
1394 NULL, NULL, NULL);
1395 if (isymbuf == NULL)
1396 goto error_return;
1397 }
1398
1399 amt = symtab_hdr->sh_info;
1400 amt *= sizeof (asection *);
1401 sections = (asection **) bfd_malloc (amt);
1402 if (sections == NULL && amt != 0)
1403 goto error_return;
1404
1405 isymend = isymbuf + symtab_hdr->sh_info;
1406 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
1407 {
1408 asection *isec;
1409
1410 if (isym->st_shndx == SHN_UNDEF)
1411 isec = bfd_und_section_ptr;
1412 else if (isym->st_shndx == SHN_ABS)
1413 isec = bfd_abs_section_ptr;
1414 else if (isym->st_shndx == SHN_COMMON)
1415 isec = bfd_com_section_ptr;
1416 else
1417 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
1418
1419 *secpp = isec;
1420 }
1421
1422 if (! elf32_h8_relocate_section (output_bfd, link_info, input_bfd,
1423 input_section, data, internal_relocs,
1424 isymbuf, sections))
1425 goto error_return;
1426
1427 if (sections != NULL)
1428 free (sections);
1429 if (isymbuf != NULL
1430 && symtab_hdr->contents != (unsigned char *) isymbuf)
1431 free (isymbuf);
1432 if (elf_section_data (input_section)->relocs != internal_relocs)
1433 free (internal_relocs);
1434 }
1435
1436 return data;
1437
1438 error_return:
1439 if (sections != NULL)
1440 free (sections);
1441 if (isymbuf != NULL
1442 && symtab_hdr->contents != (unsigned char *) isymbuf)
1443 free (isymbuf);
1444 if (internal_relocs != NULL
1445 && elf_section_data (input_section)->relocs != internal_relocs)
1446 free (internal_relocs);
1447 return NULL;
1448 }
1449
1450
1451 #define TARGET_BIG_SYM bfd_elf32_h8300_vec
1452 #define TARGET_BIG_NAME "elf32-h8300"
1453 #define ELF_ARCH bfd_arch_h8300
1454 #define ELF_MACHINE_CODE EM_H8_300
1455 #define ELF_MAXPAGESIZE 0x1
1456 #define bfd_elf32_bfd_reloc_type_lookup elf32_h8_reloc_type_lookup
1457 #define elf_info_to_howto elf32_h8_info_to_howto
1458 #define elf_info_to_howto_rel elf32_h8_info_to_howto_rel
1459
1460 /* So we can set/examine bits in e_flags to get the specific
1461 H8 architecture in use. */
1462 #define elf_backend_final_write_processing \
1463 elf32_h8_final_write_processing
1464 #define elf_backend_object_p \
1465 elf32_h8_object_p
1466 #define bfd_elf32_bfd_merge_private_bfd_data \
1467 elf32_h8_merge_private_bfd_data
1468
1469 /* ??? when elf_backend_relocate_section is not defined, elf32-target.h
1470 defaults to using _bfd_generic_link_hash_table_create, but
1471 elflink.h:bfd_elf32_size_dynamic_sections uses
1472 dynobj = elf_hash_table (info)->dynobj;
1473 and thus requires an elf hash table. */
1474 #define bfd_elf32_bfd_link_hash_table_create _bfd_elf_link_hash_table_create
1475
1476 /* Use an H8 specific linker, not the ELF generic linker. */
1477 #define elf_backend_relocate_section elf32_h8_relocate_section
1478 #define elf_backend_rela_normal 1
1479
1480 /* And relaxing stuff. */
1481 #define bfd_elf32_bfd_relax_section elf32_h8_relax_section
1482 #define bfd_elf32_bfd_get_relocated_section_contents \
1483 elf32_h8_get_relocated_section_contents
1484
1485
1486 #include "elf32-target.h"