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[thirdparty/binutils-gdb.git] / bfd / elf32-fr30.c
1 /* FR30-specific support for 32-bit ELF.
2 Copyright 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
19
20 #include "bfd.h"
21 #include "sysdep.h"
22 #include "libbfd.h"
23 #include "elf-bfd.h"
24 #include "elf/fr30.h"
25
26 /* Forward declarations. */
27 static bfd_reloc_status_type fr30_elf_i20_reloc
28 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
29 static bfd_reloc_status_type fr30_elf_i32_reloc
30 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
31 static reloc_howto_type * fr30_reloc_type_lookup
32 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
33 static void fr30_info_to_howto_rela
34 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
35 static boolean fr30_elf_relocate_section
36 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
37 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
38 static bfd_reloc_status_type fr30_final_link_relocate
39 PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
40 Elf_Internal_Rela *, bfd_vma));
41 static boolean fr30_elf_gc_sweep_hook
42 PARAMS ((bfd *, struct bfd_link_info *, asection *,
43 const Elf_Internal_Rela *));
44 static asection * fr30_elf_gc_mark_hook
45 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
46 struct elf_link_hash_entry *, Elf_Internal_Sym *));
47 static boolean fr30_elf_check_relocs
48 PARAMS ((bfd *, struct bfd_link_info *, asection *,
49 const Elf_Internal_Rela *));
50
51 static reloc_howto_type fr30_elf_howto_table [] =
52 {
53 /* This reloc does nothing. */
54 HOWTO (R_FR30_NONE, /* type */
55 0, /* rightshift */
56 2, /* size (0 = byte, 1 = short, 2 = long) */
57 32, /* bitsize */
58 false, /* pc_relative */
59 0, /* bitpos */
60 complain_overflow_bitfield, /* complain_on_overflow */
61 bfd_elf_generic_reloc, /* special_function */
62 "R_FR30_NONE", /* name */
63 false, /* partial_inplace */
64 0, /* src_mask */
65 0, /* dst_mask */
66 false), /* pcrel_offset */
67
68 /* An 8 bit absolute relocation. */
69 HOWTO (R_FR30_8, /* type */
70 0, /* rightshift */
71 1, /* size (0 = byte, 1 = short, 2 = long) */
72 8, /* bitsize */
73 false, /* pc_relative */
74 4, /* bitpos */
75 complain_overflow_bitfield, /* complain_on_overflow */
76 bfd_elf_generic_reloc, /* special_function */
77 "R_FR30_8", /* name */
78 true, /* partial_inplace */
79 0x0000, /* src_mask */
80 0x0ff0, /* dst_mask */
81 false), /* pcrel_offset */
82
83 /* A 20 bit absolute relocation. */
84 HOWTO (R_FR30_20, /* type */
85 0, /* rightshift */
86 2, /* size (0 = byte, 1 = short, 2 = long) */
87 20, /* bitsize */
88 false, /* pc_relative */
89 0, /* bitpos */
90 complain_overflow_bitfield, /* complain_on_overflow */
91 fr30_elf_i20_reloc, /* special_function */
92 "R_FR30_20", /* name */
93 true, /* partial_inplace */
94 0x00000000, /* src_mask */
95 0x00f0ffff, /* dst_mask */
96 false), /* pcrel_offset */
97
98 /* A 32 bit absolute relocation. */
99 HOWTO (R_FR30_32, /* type */
100 0, /* rightshift */
101 2, /* size (0 = byte, 1 = short, 2 = long) */
102 32, /* bitsize */
103 false, /* pc_relative */
104 0, /* bitpos */
105 complain_overflow_bitfield, /* complain_on_overflow */
106 bfd_elf_generic_reloc, /* special_function */
107 "R_FR30_32", /* name */
108 true, /* partial_inplace */
109 0x00000000, /* src_mask */
110 0xffffffff, /* dst_mask */
111 false), /* pcrel_offset */
112
113 /* A 32 bit into 48 bits absolute relocation. */
114 HOWTO (R_FR30_48, /* type */
115 0, /* rightshift */
116 2, /* size (0 = byte, 1 = short, 2 = long) */
117 32, /* bitsize */
118 false, /* pc_relative */
119 0, /* bitpos */
120 complain_overflow_bitfield, /* complain_on_overflow */
121 fr30_elf_i32_reloc, /* special_function */
122 "R_FR30_48", /* name */
123 true, /* partial_inplace */
124 0x00000000, /* src_mask */
125 0xffffffff, /* dst_mask */
126 false), /* pcrel_offset */
127
128 /* A 6 bit absolute relocation. */
129 HOWTO (R_FR30_6_IN_4, /* type */
130 2, /* rightshift */
131 1, /* size (0 = byte, 1 = short, 2 = long) */
132 6, /* bitsize */
133 false, /* pc_relative */
134 4, /* bitpos */
135 complain_overflow_unsigned, /* complain_on_overflow */
136 bfd_elf_generic_reloc, /* special_function */
137 "R_FR30_6_IN_4", /* name */
138 true, /* partial_inplace */
139 0x0000, /* src_mask */
140 0x00f0, /* dst_mask */
141 false), /* pcrel_offset */
142
143 /* An 8 bit absolute relocation. */
144 HOWTO (R_FR30_8_IN_8, /* type */
145 0, /* rightshift */
146 1, /* size (0 = byte, 1 = short, 2 = long) */
147 8, /* bitsize */
148 false, /* pc_relative */
149 4, /* bitpos */
150 complain_overflow_signed, /* complain_on_overflow */
151 bfd_elf_generic_reloc,/* special_function */
152 "R_FR30_8_IN_8", /* name */
153 true, /* partial_inplace */
154 0x0000, /* src_mask */
155 0x0ff0, /* dst_mask */
156 false), /* pcrel_offset */
157
158 /* A 9 bit absolute relocation. */
159 HOWTO (R_FR30_9_IN_8, /* type */
160 1, /* rightshift */
161 1, /* size (0 = byte, 1 = short, 2 = long) */
162 9, /* bitsize */
163 false, /* pc_relative */
164 4, /* bitpos */
165 complain_overflow_signed, /* complain_on_overflow */
166 bfd_elf_generic_reloc,/* special_function */
167 "R_FR30_9_IN_8", /* name */
168 true, /* partial_inplace */
169 0x0000, /* src_mask */
170 0x0ff0, /* dst_mask */
171 false), /* pcrel_offset */
172
173 /* A 10 bit absolute relocation. */
174 HOWTO (R_FR30_10_IN_8, /* type */
175 2, /* rightshift */
176 1, /* size (0 = byte, 1 = short, 2 = long) */
177 10, /* bitsize */
178 false, /* pc_relative */
179 4, /* bitpos */
180 complain_overflow_signed, /* complain_on_overflow */
181 bfd_elf_generic_reloc,/* special_function */
182 "R_FR30_10_IN_8", /* name */
183 true, /* partial_inplace */
184 0x0000, /* src_mask */
185 0x0ff0, /* dst_mask */
186 false), /* pcrel_offset */
187
188 /* A PC relative 9 bit relocation, right shifted by 1. */
189 HOWTO (R_FR30_9_PCREL, /* type */
190 1, /* rightshift */
191 1, /* size (0 = byte, 1 = short, 2 = long) */
192 9, /* bitsize */
193 true, /* pc_relative */
194 0, /* bitpos */
195 complain_overflow_signed, /* complain_on_overflow */
196 bfd_elf_generic_reloc, /* special_function */
197 "R_FR30_9_PCREL", /* name */
198 false, /* partial_inplace */
199 0x0000, /* src_mask */
200 0x00ff, /* dst_mask */
201 false), /* pcrel_offset */
202
203 /* A PC relative 12 bit relocation, right shifted by 1. */
204 HOWTO (R_FR30_12_PCREL, /* type */
205 1, /* rightshift */
206 1, /* size (0 = byte, 1 = short, 2 = long) */
207 12, /* bitsize */
208 true, /* pc_relative */
209 0, /* bitpos */
210 complain_overflow_signed, /* complain_on_overflow */
211 bfd_elf_generic_reloc, /* special_function */
212 "R_FR30_12_PCREL", /* name */
213 false, /* partial_inplace */
214 0x0000, /* src_mask */
215 0x07ff, /* dst_mask */
216 false), /* pcrel_offset */
217 /* GNU extension to record C++ vtable hierarchy */
218 HOWTO (R_FR30_GNU_VTINHERIT, /* type */
219 0, /* rightshift */
220 2, /* size (0 = byte, 1 = short, 2 = long) */
221 0, /* bitsize */
222 false, /* pc_relative */
223 0, /* bitpos */
224 complain_overflow_dont, /* complain_on_overflow */
225 NULL, /* special_function */
226 "R_FR30_GNU_VTINHERIT", /* name */
227 false, /* partial_inplace */
228 0, /* src_mask */
229 0, /* dst_mask */
230 false), /* pcrel_offset */
231
232 /* GNU extension to record C++ vtable member usage */
233 HOWTO (R_FR30_GNU_VTENTRY, /* type */
234 0, /* rightshift */
235 2, /* size (0 = byte, 1 = short, 2 = long) */
236 0, /* bitsize */
237 false, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_dont, /* complain_on_overflow */
240 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
241 "R_FR30_GNU_VTENTRY", /* name */
242 false, /* partial_inplace */
243 0, /* src_mask */
244 0, /* dst_mask */
245 false), /* pcrel_offset */
246 };
247 \f
248 /* Utility to actually perform an R_FR30_20 reloc. */
249
250 static bfd_reloc_status_type
251 fr30_elf_i20_reloc (abfd, reloc_entry, symbol, data,
252 input_section, output_bfd, error_message)
253 bfd * abfd;
254 arelent * reloc_entry;
255 asymbol * symbol;
256 PTR data;
257 asection * input_section;
258 bfd * output_bfd;
259 char ** error_message ATTRIBUTE_UNUSED;
260 {
261 bfd_vma relocation;
262 unsigned long x;
263
264 /* This part is from bfd_elf_generic_reloc. */
265 if (output_bfd != (bfd *) NULL
266 && (symbol->flags & BSF_SECTION_SYM) == 0
267 && (! reloc_entry->howto->partial_inplace
268 || reloc_entry->addend == 0))
269 {
270 reloc_entry->address += input_section->output_offset;
271 return bfd_reloc_ok;
272 }
273
274 if (output_bfd != NULL)
275 /* FIXME: See bfd_perform_relocation. Is this right? */
276 return bfd_reloc_ok;
277
278 relocation =
279 symbol->value
280 + symbol->section->output_section->vma
281 + symbol->section->output_offset
282 + reloc_entry->addend;
283
284 if (relocation > (((bfd_vma) 1 << 20) - 1))
285 return bfd_reloc_overflow;
286
287 x = bfd_get_32 (abfd, (char *) data + reloc_entry->address);
288 x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4);
289 bfd_put_32 (abfd, (bfd_vma) x, (char *) data + reloc_entry->address);
290
291 return bfd_reloc_ok;
292 }
293 \f
294 /* Utility to actually perform a R_FR30_48 reloc. */
295
296 static bfd_reloc_status_type
297 fr30_elf_i32_reloc (abfd, reloc_entry, symbol, data,
298 input_section, output_bfd, error_message)
299 bfd * abfd;
300 arelent * reloc_entry;
301 asymbol * symbol;
302 PTR data;
303 asection * input_section;
304 bfd * output_bfd;
305 char ** error_message ATTRIBUTE_UNUSED;
306 {
307 bfd_vma relocation;
308
309 /* This part is from bfd_elf_generic_reloc. */
310 if (output_bfd != (bfd *) NULL
311 && (symbol->flags & BSF_SECTION_SYM) == 0
312 && (! reloc_entry->howto->partial_inplace
313 || reloc_entry->addend == 0))
314 {
315 reloc_entry->address += input_section->output_offset;
316 return bfd_reloc_ok;
317 }
318
319 if (output_bfd != NULL)
320 /* FIXME: See bfd_perform_relocation. Is this right? */
321 return bfd_reloc_ok;
322
323 relocation =
324 symbol->value
325 + symbol->section->output_section->vma
326 + symbol->section->output_offset
327 + reloc_entry->addend;
328
329 bfd_put_32 (abfd, relocation, (char *) data + reloc_entry->address + 2);
330
331 return bfd_reloc_ok;
332 }
333 \f
334 /* Map BFD reloc types to FR30 ELF reloc types. */
335
336 struct fr30_reloc_map
337 {
338 bfd_reloc_code_real_type bfd_reloc_val;
339 unsigned int fr30_reloc_val;
340 };
341
342 static const struct fr30_reloc_map fr30_reloc_map [] =
343 {
344 { BFD_RELOC_NONE, R_FR30_NONE },
345 { BFD_RELOC_8, R_FR30_8 },
346 { BFD_RELOC_FR30_20, R_FR30_20 },
347 { BFD_RELOC_32, R_FR30_32 },
348 { BFD_RELOC_FR30_48, R_FR30_48 },
349 { BFD_RELOC_FR30_6_IN_4, R_FR30_6_IN_4 },
350 { BFD_RELOC_FR30_8_IN_8, R_FR30_8_IN_8 },
351 { BFD_RELOC_FR30_9_IN_8, R_FR30_9_IN_8 },
352 { BFD_RELOC_FR30_10_IN_8, R_FR30_10_IN_8 },
353 { BFD_RELOC_FR30_9_PCREL, R_FR30_9_PCREL },
354 { BFD_RELOC_FR30_12_PCREL, R_FR30_12_PCREL },
355 { BFD_RELOC_VTABLE_INHERIT, R_FR30_GNU_VTINHERIT },
356 { BFD_RELOC_VTABLE_ENTRY, R_FR30_GNU_VTENTRY },
357 };
358
359 static reloc_howto_type *
360 fr30_reloc_type_lookup (abfd, code)
361 bfd * abfd ATTRIBUTE_UNUSED;
362 bfd_reloc_code_real_type code;
363 {
364 unsigned int i;
365
366 for (i = sizeof (fr30_reloc_map) / sizeof (fr30_reloc_map[0]);
367 --i;)
368 if (fr30_reloc_map [i].bfd_reloc_val == code)
369 return & fr30_elf_howto_table [fr30_reloc_map[i].fr30_reloc_val];
370
371 return NULL;
372 }
373
374 /* Set the howto pointer for an FR30 ELF reloc. */
375
376 static void
377 fr30_info_to_howto_rela (abfd, cache_ptr, dst)
378 bfd * abfd ATTRIBUTE_UNUSED;
379 arelent * cache_ptr;
380 Elf_Internal_Rela * dst;
381 {
382 unsigned int r_type;
383
384 r_type = ELF32_R_TYPE (dst->r_info);
385 BFD_ASSERT (r_type < (unsigned int) R_FR30_max);
386 cache_ptr->howto = & fr30_elf_howto_table [r_type];
387 }
388 \f
389 /* Perform a single relocation. By default we use the standard BFD
390 routines, but a few relocs, we have to do them ourselves. */
391
392 static bfd_reloc_status_type
393 fr30_final_link_relocate (howto, input_bfd, input_section, contents, rel, relocation)
394 reloc_howto_type * howto;
395 bfd * input_bfd;
396 asection * input_section;
397 bfd_byte * contents;
398 Elf_Internal_Rela * rel;
399 bfd_vma relocation;
400 {
401 bfd_reloc_status_type r = bfd_reloc_ok;
402 bfd_vma x;
403 bfd_signed_vma srel;
404
405 switch (howto->type)
406 {
407 case R_FR30_20:
408 contents += rel->r_offset;
409 relocation += rel->r_addend;
410
411 if (relocation > ((1 << 20) - 1))
412 return bfd_reloc_overflow;
413
414 x = bfd_get_32 (input_bfd, contents);
415 x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4);
416 bfd_put_32 (input_bfd, x, contents);
417 break;
418
419 case R_FR30_48:
420 contents += rel->r_offset + 2;
421 relocation += rel->r_addend;
422 bfd_put_32 (input_bfd, relocation, contents);
423 break;
424
425 case R_FR30_9_PCREL:
426 contents += rel->r_offset + 1;
427 srel = (bfd_signed_vma) relocation;
428 srel += rel->r_addend;
429 srel -= rel->r_offset;
430 srel -= 2; /* Branch instructions add 2 to the PC... */
431 srel -= (input_section->output_section->vma +
432 input_section->output_offset);
433
434 if (srel & 1)
435 return bfd_reloc_outofrange;
436 if (srel > ((1 << 8) - 1) || (srel < - (1 << 8)))
437 return bfd_reloc_overflow;
438
439 bfd_put_8 (input_bfd, srel >> 1, contents);
440 break;
441
442 case R_FR30_12_PCREL:
443 contents += rel->r_offset;
444 srel = (bfd_signed_vma) relocation;
445 srel += rel->r_addend;
446 srel -= rel->r_offset;
447 srel -= 2; /* Branch instructions add 2 to the PC... */
448 srel -= (input_section->output_section->vma +
449 input_section->output_offset);
450
451 if (srel & 1)
452 return bfd_reloc_outofrange;
453 if (srel > ((1 << 11) - 1) || (srel < - (1 << 11)))
454 return bfd_reloc_overflow;
455
456 x = bfd_get_16 (input_bfd, contents);
457 x = (x & 0xf800) | ((srel >> 1) & 0x7ff);
458 bfd_put_16 (input_bfd, x, contents);
459 break;
460
461 default:
462 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
463 contents, rel->r_offset,
464 relocation, rel->r_addend);
465 }
466
467 return r;
468 }
469 \f
470 /* Relocate an FR30 ELF section.
471
472 The RELOCATE_SECTION function is called by the new ELF backend linker
473 to handle the relocations for a section.
474
475 The relocs are always passed as Rela structures; if the section
476 actually uses Rel structures, the r_addend field will always be
477 zero.
478
479 This function is responsible for adjusting the section contents as
480 necessary, and (if using Rela relocs and generating a relocateable
481 output file) adjusting the reloc addend as necessary.
482
483 This function does not have to worry about setting the reloc
484 address or the reloc symbol index.
485
486 LOCAL_SYMS is a pointer to the swapped in local symbols.
487
488 LOCAL_SECTIONS is an array giving the section in the input file
489 corresponding to the st_shndx field of each local symbol.
490
491 The global hash table entry for the global symbols can be found
492 via elf_sym_hashes (input_bfd).
493
494 When generating relocateable output, this function must handle
495 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
496 going to be the section symbol corresponding to the output
497 section, which means that the addend must be adjusted
498 accordingly. */
499
500 static boolean
501 fr30_elf_relocate_section (output_bfd, info, input_bfd, input_section,
502 contents, relocs, local_syms, local_sections)
503 bfd * output_bfd;
504 struct bfd_link_info * info;
505 bfd * input_bfd;
506 asection * input_section;
507 bfd_byte * contents;
508 Elf_Internal_Rela * relocs;
509 Elf_Internal_Sym * local_syms;
510 asection ** local_sections;
511 {
512 Elf_Internal_Shdr * symtab_hdr;
513 struct elf_link_hash_entry ** sym_hashes;
514 Elf_Internal_Rela * rel;
515 Elf_Internal_Rela * relend;
516
517 if (info->relocateable)
518 return true;
519
520 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
521 sym_hashes = elf_sym_hashes (input_bfd);
522 relend = relocs + input_section->reloc_count;
523
524 for (rel = relocs; rel < relend; rel ++)
525 {
526 reloc_howto_type * howto;
527 unsigned long r_symndx;
528 Elf_Internal_Sym * sym;
529 asection * sec;
530 struct elf_link_hash_entry * h;
531 bfd_vma relocation;
532 bfd_reloc_status_type r;
533 const char * name = NULL;
534 int r_type;
535
536 r_type = ELF32_R_TYPE (rel->r_info);
537
538 if ( r_type == R_FR30_GNU_VTINHERIT
539 || r_type == R_FR30_GNU_VTENTRY)
540 continue;
541
542 r_symndx = ELF32_R_SYM (rel->r_info);
543
544 howto = fr30_elf_howto_table + ELF32_R_TYPE (rel->r_info);
545 h = NULL;
546 sym = NULL;
547 sec = NULL;
548
549 if (r_symndx < symtab_hdr->sh_info)
550 {
551 sym = local_syms + r_symndx;
552 sec = local_sections [r_symndx];
553 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
554
555 name = bfd_elf_string_from_elf_section
556 (input_bfd, symtab_hdr->sh_link, sym->st_name);
557 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
558 #if 0
559 fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
560 sec->name, name, sym->st_name,
561 sec->output_section->vma, sec->output_offset,
562 sym->st_value, rel->r_addend);
563 #endif
564 }
565 else
566 {
567 h = sym_hashes [r_symndx - symtab_hdr->sh_info];
568
569 while (h->root.type == bfd_link_hash_indirect
570 || h->root.type == bfd_link_hash_warning)
571 h = (struct elf_link_hash_entry *) h->root.u.i.link;
572
573 name = h->root.root.string;
574
575 if (h->root.type == bfd_link_hash_defined
576 || h->root.type == bfd_link_hash_defweak)
577 {
578 sec = h->root.u.def.section;
579 relocation = (h->root.u.def.value
580 + sec->output_section->vma
581 + sec->output_offset);
582 #if 0
583 fprintf (stderr,
584 "defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n",
585 sec->name, name, h->root.u.def.value,
586 sec->output_section->vma, sec->output_offset, relocation);
587 #endif
588 }
589 else if (h->root.type == bfd_link_hash_undefweak)
590 {
591 #if 0
592 fprintf (stderr, "undefined: sec: %s, name: %s\n",
593 sec->name, name);
594 #endif
595 relocation = 0;
596 }
597 else
598 {
599 if (! ((*info->callbacks->undefined_symbol)
600 (info, h->root.root.string, input_bfd,
601 input_section, rel->r_offset, true)))
602 return false;
603 #if 0
604 fprintf (stderr, "unknown: name: %s\n", name);
605 #endif
606 relocation = 0;
607 }
608 }
609
610 r = fr30_final_link_relocate (howto, input_bfd, input_section,
611 contents, rel, relocation);
612
613 if (r != bfd_reloc_ok)
614 {
615 const char * msg = (const char *) NULL;
616
617 switch (r)
618 {
619 case bfd_reloc_overflow:
620 r = info->callbacks->reloc_overflow
621 (info, name, howto->name, (bfd_vma) 0,
622 input_bfd, input_section, rel->r_offset);
623 break;
624
625 case bfd_reloc_undefined:
626 r = info->callbacks->undefined_symbol
627 (info, name, input_bfd, input_section, rel->r_offset,
628 true);
629 break;
630
631 case bfd_reloc_outofrange:
632 msg = _("internal error: out of range error");
633 break;
634
635 case bfd_reloc_notsupported:
636 msg = _("internal error: unsupported relocation error");
637 break;
638
639 case bfd_reloc_dangerous:
640 msg = _("internal error: dangerous relocation");
641 break;
642
643 default:
644 msg = _("internal error: unknown error");
645 break;
646 }
647
648 if (msg)
649 r = info->callbacks->warning
650 (info, msg, name, input_bfd, input_section, rel->r_offset);
651
652 if (! r)
653 return false;
654 }
655 }
656
657 return true;
658 }
659 \f
660 /* Return the section that should be marked against GC for a given
661 relocation. */
662
663 static asection *
664 fr30_elf_gc_mark_hook (sec, info, rel, h, sym)
665 asection * sec;
666 struct bfd_link_info * info ATTRIBUTE_UNUSED;
667 Elf_Internal_Rela * rel;
668 struct elf_link_hash_entry * h;
669 Elf_Internal_Sym * sym;
670 {
671 if (h != NULL)
672 {
673 switch (ELF32_R_TYPE (rel->r_info))
674 {
675 case R_FR30_GNU_VTINHERIT:
676 case R_FR30_GNU_VTENTRY:
677 break;
678
679 default:
680 switch (h->root.type)
681 {
682 case bfd_link_hash_defined:
683 case bfd_link_hash_defweak:
684 return h->root.u.def.section;
685
686 case bfd_link_hash_common:
687 return h->root.u.c.p->section;
688
689 default:
690 break;
691 }
692 }
693 }
694 else
695 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
696
697 return NULL;
698 }
699
700 /* Update the got entry reference counts for the section being removed. */
701
702 static boolean
703 fr30_elf_gc_sweep_hook (abfd, info, sec, relocs)
704 bfd * abfd ATTRIBUTE_UNUSED;
705 struct bfd_link_info * info ATTRIBUTE_UNUSED;
706 asection * sec ATTRIBUTE_UNUSED;
707 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED;
708 {
709 return true;
710 }
711
712 /* Look through the relocs for a section during the first phase.
713 Since we don't do .gots or .plts, we just need to consider the
714 virtual table relocs for gc. */
715
716 static boolean
717 fr30_elf_check_relocs (abfd, info, sec, relocs)
718 bfd *abfd;
719 struct bfd_link_info *info;
720 asection *sec;
721 const Elf_Internal_Rela *relocs;
722 {
723 Elf_Internal_Shdr *symtab_hdr;
724 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
725 const Elf_Internal_Rela *rel;
726 const Elf_Internal_Rela *rel_end;
727
728 if (info->relocateable)
729 return true;
730
731 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
732 sym_hashes = elf_sym_hashes (abfd);
733 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
734 if (!elf_bad_symtab (abfd))
735 sym_hashes_end -= symtab_hdr->sh_info;
736
737 rel_end = relocs + sec->reloc_count;
738 for (rel = relocs; rel < rel_end; rel++)
739 {
740 struct elf_link_hash_entry *h;
741 unsigned long r_symndx;
742
743 r_symndx = ELF32_R_SYM (rel->r_info);
744 if (r_symndx < symtab_hdr->sh_info)
745 h = NULL;
746 else
747 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
748
749 switch (ELF32_R_TYPE (rel->r_info))
750 {
751 /* This relocation describes the C++ object vtable hierarchy.
752 Reconstruct it for later use during GC. */
753 case R_FR30_GNU_VTINHERIT:
754 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
755 return false;
756 break;
757
758 /* This relocation describes which C++ vtable entries are actually
759 used. Record for later use during GC. */
760 case R_FR30_GNU_VTENTRY:
761 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
762 return false;
763 break;
764 }
765 }
766
767 return true;
768 }
769 \f
770 #define ELF_ARCH bfd_arch_fr30
771 #define ELF_MACHINE_CODE EM_FR30
772 #define ELF_MACHINE_ALT1 EM_CYGNUS_FR30
773 #define ELF_MAXPAGESIZE 0x1000
774
775 #define TARGET_BIG_SYM bfd_elf32_fr30_vec
776 #define TARGET_BIG_NAME "elf32-fr30"
777
778 #define elf_info_to_howto_rel NULL
779 #define elf_info_to_howto fr30_info_to_howto_rela
780 #define elf_backend_relocate_section fr30_elf_relocate_section
781 #define elf_backend_gc_mark_hook fr30_elf_gc_mark_hook
782 #define elf_backend_gc_sweep_hook fr30_elf_gc_sweep_hook
783 #define elf_backend_check_relocs fr30_elf_check_relocs
784
785 #define elf_backend_can_gc_sections 1
786 #define elf_backend_rela_normal 1
787
788 #define bfd_elf32_bfd_reloc_type_lookup fr30_reloc_type_lookup
789
790 #include "elf32-target.h"
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