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bfd/
[deliverable/binutils-gdb.git] / bfd / elf32-fr30.c
1 /* FR30-specific support for 32-bit ELF.
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "bfd.h"
23 #include "libbfd.h"
24 #include "elf-bfd.h"
25 #include "elf/fr30.h"
26
27 /* Forward declarations. */
28 static bfd_reloc_status_type fr30_elf_i20_reloc
29 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
30 static bfd_reloc_status_type fr30_elf_i32_reloc
31 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
32 static reloc_howto_type * fr30_reloc_type_lookup
33 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
34 static void fr30_info_to_howto_rela
35 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
36 static bfd_boolean fr30_elf_relocate_section
37 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
38 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
39 static bfd_reloc_status_type fr30_final_link_relocate
40 PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
41 Elf_Internal_Rela *, bfd_vma));
42 static bfd_boolean fr30_elf_check_relocs
43 PARAMS ((bfd *, struct bfd_link_info *, asection *,
44 const Elf_Internal_Rela *));
45
46 static reloc_howto_type fr30_elf_howto_table [] =
47 {
48 /* This reloc does nothing. */
49 HOWTO (R_FR30_NONE, /* type */
50 0, /* rightshift */
51 2, /* size (0 = byte, 1 = short, 2 = long) */
52 32, /* bitsize */
53 FALSE, /* pc_relative */
54 0, /* bitpos */
55 complain_overflow_bitfield, /* complain_on_overflow */
56 bfd_elf_generic_reloc, /* special_function */
57 "R_FR30_NONE", /* name */
58 FALSE, /* partial_inplace */
59 0, /* src_mask */
60 0, /* dst_mask */
61 FALSE), /* pcrel_offset */
62
63 /* An 8 bit absolute relocation. */
64 HOWTO (R_FR30_8, /* type */
65 0, /* rightshift */
66 1, /* size (0 = byte, 1 = short, 2 = long) */
67 8, /* bitsize */
68 FALSE, /* pc_relative */
69 4, /* bitpos */
70 complain_overflow_bitfield, /* complain_on_overflow */
71 bfd_elf_generic_reloc, /* special_function */
72 "R_FR30_8", /* name */
73 TRUE, /* partial_inplace */
74 0x0000, /* src_mask */
75 0x0ff0, /* dst_mask */
76 FALSE), /* pcrel_offset */
77
78 /* A 20 bit absolute relocation. */
79 HOWTO (R_FR30_20, /* type */
80 0, /* rightshift */
81 2, /* size (0 = byte, 1 = short, 2 = long) */
82 20, /* bitsize */
83 FALSE, /* pc_relative */
84 0, /* bitpos */
85 complain_overflow_bitfield, /* complain_on_overflow */
86 fr30_elf_i20_reloc, /* special_function */
87 "R_FR30_20", /* name */
88 TRUE, /* partial_inplace */
89 0x00000000, /* src_mask */
90 0x00f0ffff, /* dst_mask */
91 FALSE), /* pcrel_offset */
92
93 /* A 32 bit absolute relocation. */
94 HOWTO (R_FR30_32, /* type */
95 0, /* rightshift */
96 2, /* size (0 = byte, 1 = short, 2 = long) */
97 32, /* bitsize */
98 FALSE, /* pc_relative */
99 0, /* bitpos */
100 complain_overflow_bitfield, /* complain_on_overflow */
101 bfd_elf_generic_reloc, /* special_function */
102 "R_FR30_32", /* name */
103 TRUE, /* partial_inplace */
104 0x00000000, /* src_mask */
105 0xffffffff, /* dst_mask */
106 FALSE), /* pcrel_offset */
107
108 /* A 32 bit into 48 bits absolute relocation. */
109 HOWTO (R_FR30_48, /* type */
110 0, /* rightshift */
111 2, /* size (0 = byte, 1 = short, 2 = long) */
112 32, /* bitsize */
113 FALSE, /* pc_relative */
114 0, /* bitpos */
115 complain_overflow_bitfield, /* complain_on_overflow */
116 fr30_elf_i32_reloc, /* special_function */
117 "R_FR30_48", /* name */
118 TRUE, /* partial_inplace */
119 0x00000000, /* src_mask */
120 0xffffffff, /* dst_mask */
121 FALSE), /* pcrel_offset */
122
123 /* A 6 bit absolute relocation. */
124 HOWTO (R_FR30_6_IN_4, /* type */
125 2, /* rightshift */
126 1, /* size (0 = byte, 1 = short, 2 = long) */
127 6, /* bitsize */
128 FALSE, /* pc_relative */
129 4, /* bitpos */
130 complain_overflow_unsigned, /* complain_on_overflow */
131 bfd_elf_generic_reloc, /* special_function */
132 "R_FR30_6_IN_4", /* name */
133 TRUE, /* partial_inplace */
134 0x0000, /* src_mask */
135 0x00f0, /* dst_mask */
136 FALSE), /* pcrel_offset */
137
138 /* An 8 bit absolute relocation. */
139 HOWTO (R_FR30_8_IN_8, /* type */
140 0, /* rightshift */
141 1, /* size (0 = byte, 1 = short, 2 = long) */
142 8, /* bitsize */
143 FALSE, /* pc_relative */
144 4, /* bitpos */
145 complain_overflow_signed, /* complain_on_overflow */
146 bfd_elf_generic_reloc,/* special_function */
147 "R_FR30_8_IN_8", /* name */
148 TRUE, /* partial_inplace */
149 0x0000, /* src_mask */
150 0x0ff0, /* dst_mask */
151 FALSE), /* pcrel_offset */
152
153 /* A 9 bit absolute relocation. */
154 HOWTO (R_FR30_9_IN_8, /* type */
155 1, /* rightshift */
156 1, /* size (0 = byte, 1 = short, 2 = long) */
157 9, /* bitsize */
158 FALSE, /* pc_relative */
159 4, /* bitpos */
160 complain_overflow_signed, /* complain_on_overflow */
161 bfd_elf_generic_reloc,/* special_function */
162 "R_FR30_9_IN_8", /* name */
163 TRUE, /* partial_inplace */
164 0x0000, /* src_mask */
165 0x0ff0, /* dst_mask */
166 FALSE), /* pcrel_offset */
167
168 /* A 10 bit absolute relocation. */
169 HOWTO (R_FR30_10_IN_8, /* type */
170 2, /* rightshift */
171 1, /* size (0 = byte, 1 = short, 2 = long) */
172 10, /* bitsize */
173 FALSE, /* pc_relative */
174 4, /* bitpos */
175 complain_overflow_signed, /* complain_on_overflow */
176 bfd_elf_generic_reloc,/* special_function */
177 "R_FR30_10_IN_8", /* name */
178 TRUE, /* partial_inplace */
179 0x0000, /* src_mask */
180 0x0ff0, /* dst_mask */
181 FALSE), /* pcrel_offset */
182
183 /* A PC relative 9 bit relocation, right shifted by 1. */
184 HOWTO (R_FR30_9_PCREL, /* type */
185 1, /* rightshift */
186 1, /* size (0 = byte, 1 = short, 2 = long) */
187 9, /* bitsize */
188 TRUE, /* pc_relative */
189 0, /* bitpos */
190 complain_overflow_signed, /* complain_on_overflow */
191 bfd_elf_generic_reloc, /* special_function */
192 "R_FR30_9_PCREL", /* name */
193 FALSE, /* partial_inplace */
194 0x0000, /* src_mask */
195 0x00ff, /* dst_mask */
196 FALSE), /* pcrel_offset */
197
198 /* A PC relative 12 bit relocation, right shifted by 1. */
199 HOWTO (R_FR30_12_PCREL, /* type */
200 1, /* rightshift */
201 1, /* size (0 = byte, 1 = short, 2 = long) */
202 12, /* bitsize */
203 TRUE, /* pc_relative */
204 0, /* bitpos */
205 complain_overflow_signed, /* complain_on_overflow */
206 bfd_elf_generic_reloc, /* special_function */
207 "R_FR30_12_PCREL", /* name */
208 FALSE, /* partial_inplace */
209 0x0000, /* src_mask */
210 0x07ff, /* dst_mask */
211 FALSE), /* pcrel_offset */
212 /* GNU extension to record C++ vtable hierarchy */
213 HOWTO (R_FR30_GNU_VTINHERIT, /* type */
214 0, /* rightshift */
215 2, /* size (0 = byte, 1 = short, 2 = long) */
216 0, /* bitsize */
217 FALSE, /* pc_relative */
218 0, /* bitpos */
219 complain_overflow_dont, /* complain_on_overflow */
220 NULL, /* special_function */
221 "R_FR30_GNU_VTINHERIT", /* name */
222 FALSE, /* partial_inplace */
223 0, /* src_mask */
224 0, /* dst_mask */
225 FALSE), /* pcrel_offset */
226
227 /* GNU extension to record C++ vtable member usage */
228 HOWTO (R_FR30_GNU_VTENTRY, /* type */
229 0, /* rightshift */
230 2, /* size (0 = byte, 1 = short, 2 = long) */
231 0, /* bitsize */
232 FALSE, /* pc_relative */
233 0, /* bitpos */
234 complain_overflow_dont, /* complain_on_overflow */
235 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
236 "R_FR30_GNU_VTENTRY", /* name */
237 FALSE, /* partial_inplace */
238 0, /* src_mask */
239 0, /* dst_mask */
240 FALSE), /* pcrel_offset */
241 };
242 \f
243 /* Utility to actually perform an R_FR30_20 reloc. */
244
245 static bfd_reloc_status_type
246 fr30_elf_i20_reloc (abfd, reloc_entry, symbol, data,
247 input_section, output_bfd, error_message)
248 bfd *abfd;
249 arelent *reloc_entry;
250 asymbol *symbol;
251 PTR data;
252 asection *input_section;
253 bfd *output_bfd;
254 char **error_message ATTRIBUTE_UNUSED;
255 {
256 bfd_vma relocation;
257 unsigned long x;
258
259 /* This part is from bfd_elf_generic_reloc. */
260 if (output_bfd != (bfd *) NULL
261 && (symbol->flags & BSF_SECTION_SYM) == 0
262 && (! reloc_entry->howto->partial_inplace
263 || reloc_entry->addend == 0))
264 {
265 reloc_entry->address += input_section->output_offset;
266 return bfd_reloc_ok;
267 }
268
269 if (output_bfd != NULL)
270 /* FIXME: See bfd_perform_relocation. Is this right? */
271 return bfd_reloc_ok;
272
273 relocation =
274 symbol->value
275 + symbol->section->output_section->vma
276 + symbol->section->output_offset
277 + reloc_entry->addend;
278
279 if (relocation > (((bfd_vma) 1 << 20) - 1))
280 return bfd_reloc_overflow;
281
282 x = bfd_get_32 (abfd, (char *) data + reloc_entry->address);
283 x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4);
284 bfd_put_32 (abfd, (bfd_vma) x, (char *) data + reloc_entry->address);
285
286 return bfd_reloc_ok;
287 }
288 \f
289 /* Utility to actually perform a R_FR30_48 reloc. */
290
291 static bfd_reloc_status_type
292 fr30_elf_i32_reloc (abfd, reloc_entry, symbol, data,
293 input_section, output_bfd, error_message)
294 bfd *abfd;
295 arelent *reloc_entry;
296 asymbol *symbol;
297 PTR data;
298 asection *input_section;
299 bfd *output_bfd;
300 char **error_message ATTRIBUTE_UNUSED;
301 {
302 bfd_vma relocation;
303
304 /* This part is from bfd_elf_generic_reloc. */
305 if (output_bfd != (bfd *) NULL
306 && (symbol->flags & BSF_SECTION_SYM) == 0
307 && (! reloc_entry->howto->partial_inplace
308 || reloc_entry->addend == 0))
309 {
310 reloc_entry->address += input_section->output_offset;
311 return bfd_reloc_ok;
312 }
313
314 if (output_bfd != NULL)
315 /* FIXME: See bfd_perform_relocation. Is this right? */
316 return bfd_reloc_ok;
317
318 relocation =
319 symbol->value
320 + symbol->section->output_section->vma
321 + symbol->section->output_offset
322 + reloc_entry->addend;
323
324 bfd_put_32 (abfd, relocation, (char *) data + reloc_entry->address + 2);
325
326 return bfd_reloc_ok;
327 }
328 \f
329 /* Map BFD reloc types to FR30 ELF reloc types. */
330
331 struct fr30_reloc_map
332 {
333 bfd_reloc_code_real_type bfd_reloc_val;
334 unsigned int fr30_reloc_val;
335 };
336
337 static const struct fr30_reloc_map fr30_reloc_map [] =
338 {
339 { BFD_RELOC_NONE, R_FR30_NONE },
340 { BFD_RELOC_8, R_FR30_8 },
341 { BFD_RELOC_FR30_20, R_FR30_20 },
342 { BFD_RELOC_32, R_FR30_32 },
343 { BFD_RELOC_FR30_48, R_FR30_48 },
344 { BFD_RELOC_FR30_6_IN_4, R_FR30_6_IN_4 },
345 { BFD_RELOC_FR30_8_IN_8, R_FR30_8_IN_8 },
346 { BFD_RELOC_FR30_9_IN_8, R_FR30_9_IN_8 },
347 { BFD_RELOC_FR30_10_IN_8, R_FR30_10_IN_8 },
348 { BFD_RELOC_FR30_9_PCREL, R_FR30_9_PCREL },
349 { BFD_RELOC_FR30_12_PCREL, R_FR30_12_PCREL },
350 { BFD_RELOC_VTABLE_INHERIT, R_FR30_GNU_VTINHERIT },
351 { BFD_RELOC_VTABLE_ENTRY, R_FR30_GNU_VTENTRY },
352 };
353
354 static reloc_howto_type *
355 fr30_reloc_type_lookup (abfd, code)
356 bfd *abfd ATTRIBUTE_UNUSED;
357 bfd_reloc_code_real_type code;
358 {
359 unsigned int i;
360
361 for (i = sizeof (fr30_reloc_map) / sizeof (fr30_reloc_map[0]);
362 --i;)
363 if (fr30_reloc_map [i].bfd_reloc_val == code)
364 return & fr30_elf_howto_table [fr30_reloc_map[i].fr30_reloc_val];
365
366 return NULL;
367 }
368
369 static reloc_howto_type *
370 fr30_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
371 {
372 unsigned int i;
373
374 for (i = 0;
375 i < sizeof (fr30_elf_howto_table) / sizeof (fr30_elf_howto_table[0]);
376 i++)
377 if (fr30_elf_howto_table[i].name != NULL
378 && strcasecmp (fr30_elf_howto_table[i].name, r_name) == 0)
379 return &fr30_elf_howto_table[i];
380
381 return NULL;
382 }
383
384 /* Set the howto pointer for an FR30 ELF reloc. */
385
386 static void
387 fr30_info_to_howto_rela (abfd, cache_ptr, dst)
388 bfd *abfd ATTRIBUTE_UNUSED;
389 arelent *cache_ptr;
390 Elf_Internal_Rela *dst;
391 {
392 unsigned int r_type;
393
394 r_type = ELF32_R_TYPE (dst->r_info);
395 BFD_ASSERT (r_type < (unsigned int) R_FR30_max);
396 cache_ptr->howto = & fr30_elf_howto_table [r_type];
397 }
398 \f
399 /* Perform a single relocation. By default we use the standard BFD
400 routines, but a few relocs, we have to do them ourselves. */
401
402 static bfd_reloc_status_type
403 fr30_final_link_relocate (howto, input_bfd, input_section, contents, rel,
404 relocation)
405 reloc_howto_type *howto;
406 bfd *input_bfd;
407 asection *input_section;
408 bfd_byte *contents;
409 Elf_Internal_Rela *rel;
410 bfd_vma relocation;
411 {
412 bfd_reloc_status_type r = bfd_reloc_ok;
413 bfd_vma x;
414 bfd_signed_vma srel;
415
416 switch (howto->type)
417 {
418 case R_FR30_20:
419 contents += rel->r_offset;
420 relocation += rel->r_addend;
421
422 if (relocation > ((1 << 20) - 1))
423 return bfd_reloc_overflow;
424
425 x = bfd_get_32 (input_bfd, contents);
426 x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4);
427 bfd_put_32 (input_bfd, x, contents);
428 break;
429
430 case R_FR30_48:
431 contents += rel->r_offset + 2;
432 relocation += rel->r_addend;
433 bfd_put_32 (input_bfd, relocation, contents);
434 break;
435
436 case R_FR30_9_PCREL:
437 contents += rel->r_offset + 1;
438 srel = (bfd_signed_vma) relocation;
439 srel += rel->r_addend;
440 srel -= rel->r_offset;
441 srel -= 2; /* Branch instructions add 2 to the PC... */
442 srel -= (input_section->output_section->vma +
443 input_section->output_offset);
444
445 if (srel & 1)
446 return bfd_reloc_outofrange;
447 if (srel > ((1 << 8) - 1) || (srel < - (1 << 8)))
448 return bfd_reloc_overflow;
449
450 bfd_put_8 (input_bfd, srel >> 1, contents);
451 break;
452
453 case R_FR30_12_PCREL:
454 contents += rel->r_offset;
455 srel = (bfd_signed_vma) relocation;
456 srel += rel->r_addend;
457 srel -= rel->r_offset;
458 srel -= 2; /* Branch instructions add 2 to the PC... */
459 srel -= (input_section->output_section->vma +
460 input_section->output_offset);
461
462 if (srel & 1)
463 return bfd_reloc_outofrange;
464 if (srel > ((1 << 11) - 1) || (srel < - (1 << 11)))
465 return bfd_reloc_overflow;
466
467 x = bfd_get_16 (input_bfd, contents);
468 x = (x & 0xf800) | ((srel >> 1) & 0x7ff);
469 bfd_put_16 (input_bfd, x, contents);
470 break;
471
472 default:
473 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
474 contents, rel->r_offset,
475 relocation, rel->r_addend);
476 }
477
478 return r;
479 }
480 \f
481 /* Relocate an FR30 ELF section.
482
483 The RELOCATE_SECTION function is called by the new ELF backend linker
484 to handle the relocations for a section.
485
486 The relocs are always passed as Rela structures; if the section
487 actually uses Rel structures, the r_addend field will always be
488 zero.
489
490 This function is responsible for adjusting the section contents as
491 necessary, and (if using Rela relocs and generating a relocatable
492 output file) adjusting the reloc addend as necessary.
493
494 This function does not have to worry about setting the reloc
495 address or the reloc symbol index.
496
497 LOCAL_SYMS is a pointer to the swapped in local symbols.
498
499 LOCAL_SECTIONS is an array giving the section in the input file
500 corresponding to the st_shndx field of each local symbol.
501
502 The global hash table entry for the global symbols can be found
503 via elf_sym_hashes (input_bfd).
504
505 When generating relocatable output, this function must handle
506 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
507 going to be the section symbol corresponding to the output
508 section, which means that the addend must be adjusted
509 accordingly. */
510
511 static bfd_boolean
512 fr30_elf_relocate_section (output_bfd, info, input_bfd, input_section,
513 contents, relocs, local_syms, local_sections)
514 bfd *output_bfd;
515 struct bfd_link_info *info;
516 bfd *input_bfd;
517 asection *input_section;
518 bfd_byte *contents;
519 Elf_Internal_Rela *relocs;
520 Elf_Internal_Sym *local_syms;
521 asection **local_sections;
522 {
523 Elf_Internal_Shdr *symtab_hdr;
524 struct elf_link_hash_entry **sym_hashes;
525 Elf_Internal_Rela *rel;
526 Elf_Internal_Rela *relend;
527
528 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
529 sym_hashes = elf_sym_hashes (input_bfd);
530 relend = relocs + input_section->reloc_count;
531
532 for (rel = relocs; rel < relend; rel ++)
533 {
534 reloc_howto_type *howto;
535 unsigned long r_symndx;
536 Elf_Internal_Sym *sym;
537 asection *sec;
538 struct elf_link_hash_entry *h;
539 bfd_vma relocation;
540 bfd_reloc_status_type r;
541 const char *name;
542 int r_type;
543
544 r_type = ELF32_R_TYPE (rel->r_info);
545
546 if ( r_type == R_FR30_GNU_VTINHERIT
547 || r_type == R_FR30_GNU_VTENTRY)
548 continue;
549
550 r_symndx = ELF32_R_SYM (rel->r_info);
551
552 howto = fr30_elf_howto_table + ELF32_R_TYPE (rel->r_info);
553 h = NULL;
554 sym = NULL;
555 sec = NULL;
556
557 if (r_symndx < symtab_hdr->sh_info)
558 {
559 sym = local_syms + r_symndx;
560 sec = local_sections [r_symndx];
561 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
562
563 name = bfd_elf_string_from_elf_section
564 (input_bfd, symtab_hdr->sh_link, sym->st_name);
565 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
566 }
567 else
568 {
569 bfd_boolean unresolved_reloc, warned;
570
571 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
572 r_symndx, symtab_hdr, sym_hashes,
573 h, sec, relocation,
574 unresolved_reloc, warned);
575
576 name = h->root.root.string;
577 }
578
579 if (sec != NULL && elf_discarded_section (sec))
580 {
581 /* For relocs against symbols from removed linkonce sections,
582 or sections discarded by a linker script, we just want the
583 section contents zeroed. Avoid any special processing. */
584 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
585 rel->r_info = 0;
586 rel->r_addend = 0;
587 continue;
588 }
589
590 if (info->relocatable)
591 continue;
592
593 r = fr30_final_link_relocate (howto, input_bfd, input_section,
594 contents, rel, relocation);
595
596 if (r != bfd_reloc_ok)
597 {
598 const char * msg = (const char *) NULL;
599
600 switch (r)
601 {
602 case bfd_reloc_overflow:
603 r = info->callbacks->reloc_overflow
604 (info, (h ? &h->root : NULL), name, howto->name,
605 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
606 break;
607
608 case bfd_reloc_undefined:
609 r = info->callbacks->undefined_symbol
610 (info, name, input_bfd, input_section, rel->r_offset,
611 TRUE);
612 break;
613
614 case bfd_reloc_outofrange:
615 msg = _("internal error: out of range error");
616 break;
617
618 case bfd_reloc_notsupported:
619 msg = _("internal error: unsupported relocation error");
620 break;
621
622 case bfd_reloc_dangerous:
623 msg = _("internal error: dangerous relocation");
624 break;
625
626 default:
627 msg = _("internal error: unknown error");
628 break;
629 }
630
631 if (msg)
632 r = info->callbacks->warning
633 (info, msg, name, input_bfd, input_section, rel->r_offset);
634
635 if (! r)
636 return FALSE;
637 }
638 }
639
640 return TRUE;
641 }
642 \f
643 /* Return the section that should be marked against GC for a given
644 relocation. */
645
646 static asection *
647 fr30_elf_gc_mark_hook (asection *sec,
648 struct bfd_link_info *info,
649 Elf_Internal_Rela *rel,
650 struct elf_link_hash_entry *h,
651 Elf_Internal_Sym *sym)
652 {
653 if (h != NULL)
654 switch (ELF32_R_TYPE (rel->r_info))
655 {
656 case R_FR30_GNU_VTINHERIT:
657 case R_FR30_GNU_VTENTRY:
658 return NULL;
659 }
660
661 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
662 }
663
664 /* Look through the relocs for a section during the first phase.
665 Since we don't do .gots or .plts, we just need to consider the
666 virtual table relocs for gc. */
667
668 static bfd_boolean
669 fr30_elf_check_relocs (abfd, info, sec, relocs)
670 bfd *abfd;
671 struct bfd_link_info *info;
672 asection *sec;
673 const Elf_Internal_Rela *relocs;
674 {
675 Elf_Internal_Shdr *symtab_hdr;
676 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
677 const Elf_Internal_Rela *rel;
678 const Elf_Internal_Rela *rel_end;
679
680 if (info->relocatable)
681 return TRUE;
682
683 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
684 sym_hashes = elf_sym_hashes (abfd);
685 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
686 if (!elf_bad_symtab (abfd))
687 sym_hashes_end -= symtab_hdr->sh_info;
688
689 rel_end = relocs + sec->reloc_count;
690 for (rel = relocs; rel < rel_end; rel++)
691 {
692 struct elf_link_hash_entry *h;
693 unsigned long r_symndx;
694
695 r_symndx = ELF32_R_SYM (rel->r_info);
696 if (r_symndx < symtab_hdr->sh_info)
697 h = NULL;
698 else
699 {
700 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
701 while (h->root.type == bfd_link_hash_indirect
702 || h->root.type == bfd_link_hash_warning)
703 h = (struct elf_link_hash_entry *) h->root.u.i.link;
704 }
705
706 switch (ELF32_R_TYPE (rel->r_info))
707 {
708 /* This relocation describes the C++ object vtable hierarchy.
709 Reconstruct it for later use during GC. */
710 case R_FR30_GNU_VTINHERIT:
711 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
712 return FALSE;
713 break;
714
715 /* This relocation describes which C++ vtable entries are actually
716 used. Record for later use during GC. */
717 case R_FR30_GNU_VTENTRY:
718 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
719 return FALSE;
720 break;
721 }
722 }
723
724 return TRUE;
725 }
726 \f
727 #define ELF_ARCH bfd_arch_fr30
728 #define ELF_MACHINE_CODE EM_FR30
729 #define ELF_MACHINE_ALT1 EM_CYGNUS_FR30
730 #define ELF_MAXPAGESIZE 0x1000
731
732 #define TARGET_BIG_SYM bfd_elf32_fr30_vec
733 #define TARGET_BIG_NAME "elf32-fr30"
734
735 #define elf_info_to_howto_rel NULL
736 #define elf_info_to_howto fr30_info_to_howto_rela
737 #define elf_backend_relocate_section fr30_elf_relocate_section
738 #define elf_backend_gc_mark_hook fr30_elf_gc_mark_hook
739 #define elf_backend_check_relocs fr30_elf_check_relocs
740
741 #define elf_backend_can_gc_sections 1
742 #define elf_backend_rela_normal 1
743
744 #define bfd_elf32_bfd_reloc_type_lookup fr30_reloc_type_lookup
745 #define bfd_elf32_bfd_reloc_name_lookup fr30_reloc_name_lookup
746
747 #include "elf32-target.h"
GDB Binutils - Deliverables
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