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[deliverable/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 *, Elf32_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 Elf32_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 There is some attempt to make this function usable for many architectures,
472 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
473 if only to serve as a learning tool.
474
475 The RELOCATE_SECTION function is called by the new ELF backend linker
476 to handle the relocations for a section.
477
478 The relocs are always passed as Rela structures; if the section
479 actually uses Rel structures, the r_addend field will always be
480 zero.
481
482 This function is responsible for adjusting the section contents as
483 necessary, and (if using Rela relocs and generating a relocateable
484 output file) adjusting the reloc addend as necessary.
485
486 This function does not have to worry about setting the reloc
487 address or the reloc symbol index.
488
489 LOCAL_SYMS is a pointer to the swapped in local symbols.
490
491 LOCAL_SECTIONS is an array giving the section in the input file
492 corresponding to the st_shndx field of each local symbol.
493
494 The global hash table entry for the global symbols can be found
495 via elf_sym_hashes (input_bfd).
496
497 When generating relocateable output, this function must handle
498 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
499 going to be the section symbol corresponding to the output
500 section, which means that the addend must be adjusted
501 accordingly. */
502
503 static boolean
504 fr30_elf_relocate_section (output_bfd, info, input_bfd, input_section,
505 contents, relocs, local_syms, local_sections)
506 bfd * output_bfd;
507 struct bfd_link_info * info;
508 bfd * input_bfd;
509 asection * input_section;
510 bfd_byte * contents;
511 Elf_Internal_Rela * relocs;
512 Elf_Internal_Sym * local_syms;
513 asection ** local_sections;
514 {
515 Elf_Internal_Shdr * symtab_hdr;
516 struct elf_link_hash_entry ** sym_hashes;
517 Elf_Internal_Rela * rel;
518 Elf_Internal_Rela * relend;
519
520 if (info->relocateable)
521 return true;
522
523 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
524 sym_hashes = elf_sym_hashes (input_bfd);
525 relend = relocs + input_section->reloc_count;
526
527 for (rel = relocs; rel < relend; rel ++)
528 {
529 reloc_howto_type * howto;
530 unsigned long r_symndx;
531 Elf_Internal_Sym * sym;
532 asection * sec;
533 struct elf_link_hash_entry * h;
534 bfd_vma relocation;
535 bfd_reloc_status_type r;
536 const char * name = NULL;
537 int r_type;
538
539 r_type = ELF32_R_TYPE (rel->r_info);
540
541 if ( r_type == R_FR30_GNU_VTINHERIT
542 || r_type == R_FR30_GNU_VTENTRY)
543 continue;
544
545 r_symndx = ELF32_R_SYM (rel->r_info);
546
547 howto = fr30_elf_howto_table + ELF32_R_TYPE (rel->r_info);
548 h = NULL;
549 sym = NULL;
550 sec = NULL;
551
552 if (r_symndx < symtab_hdr->sh_info)
553 {
554 sym = local_syms + r_symndx;
555 sec = local_sections [r_symndx];
556 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
557
558 name = bfd_elf_string_from_elf_section
559 (input_bfd, symtab_hdr->sh_link, sym->st_name);
560 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
561 #if 0
562 fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
563 sec->name, name, sym->st_name,
564 sec->output_section->vma, sec->output_offset,
565 sym->st_value, rel->r_addend);
566 #endif
567 }
568 else
569 {
570 h = sym_hashes [r_symndx - symtab_hdr->sh_info];
571
572 while (h->root.type == bfd_link_hash_indirect
573 || h->root.type == bfd_link_hash_warning)
574 h = (struct elf_link_hash_entry *) h->root.u.i.link;
575
576 name = h->root.root.string;
577
578 if (h->root.type == bfd_link_hash_defined
579 || h->root.type == bfd_link_hash_defweak)
580 {
581 sec = h->root.u.def.section;
582 relocation = (h->root.u.def.value
583 + sec->output_section->vma
584 + sec->output_offset);
585 #if 0
586 fprintf (stderr,
587 "defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n",
588 sec->name, name, h->root.u.def.value,
589 sec->output_section->vma, sec->output_offset, relocation);
590 #endif
591 }
592 else if (h->root.type == bfd_link_hash_undefweak)
593 {
594 #if 0
595 fprintf (stderr, "undefined: sec: %s, name: %s\n",
596 sec->name, name);
597 #endif
598 relocation = 0;
599 }
600 else
601 {
602 if (! ((*info->callbacks->undefined_symbol)
603 (info, h->root.root.string, input_bfd,
604 input_section, rel->r_offset, true)))
605 return false;
606 #if 0
607 fprintf (stderr, "unknown: name: %s\n", name);
608 #endif
609 relocation = 0;
610 }
611 }
612
613 r = fr30_final_link_relocate (howto, input_bfd, input_section,
614 contents, rel, relocation);
615
616 if (r != bfd_reloc_ok)
617 {
618 const char * msg = (const char *) NULL;
619
620 switch (r)
621 {
622 case bfd_reloc_overflow:
623 r = info->callbacks->reloc_overflow
624 (info, name, howto->name, (bfd_vma) 0,
625 input_bfd, input_section, rel->r_offset);
626 break;
627
628 case bfd_reloc_undefined:
629 r = info->callbacks->undefined_symbol
630 (info, name, input_bfd, input_section, rel->r_offset,
631 true);
632 break;
633
634 case bfd_reloc_outofrange:
635 msg = _("internal error: out of range error");
636 break;
637
638 case bfd_reloc_notsupported:
639 msg = _("internal error: unsupported relocation error");
640 break;
641
642 case bfd_reloc_dangerous:
643 msg = _("internal error: dangerous relocation");
644 break;
645
646 default:
647 msg = _("internal error: unknown error");
648 break;
649 }
650
651 if (msg)
652 r = info->callbacks->warning
653 (info, msg, name, input_bfd, input_section, rel->r_offset);
654
655 if (! r)
656 return false;
657 }
658 }
659
660 return true;
661 }
662 \f
663 /* Return the section that should be marked against GC for a given
664 relocation. */
665
666 static asection *
667 fr30_elf_gc_mark_hook (sec, info, rel, h, sym)
668 asection * sec;
669 struct bfd_link_info * info ATTRIBUTE_UNUSED;
670 Elf_Internal_Rela * rel;
671 struct elf_link_hash_entry * h;
672 Elf_Internal_Sym * sym;
673 {
674 if (h != NULL)
675 {
676 switch (ELF32_R_TYPE (rel->r_info))
677 {
678 case R_FR30_GNU_VTINHERIT:
679 case R_FR30_GNU_VTENTRY:
680 break;
681
682 default:
683 switch (h->root.type)
684 {
685 case bfd_link_hash_defined:
686 case bfd_link_hash_defweak:
687 return h->root.u.def.section;
688
689 case bfd_link_hash_common:
690 return h->root.u.c.p->section;
691
692 default:
693 break;
694 }
695 }
696 }
697 else
698 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
699
700 return NULL;
701 }
702
703 /* Update the got entry reference counts for the section being removed. */
704
705 static boolean
706 fr30_elf_gc_sweep_hook (abfd, info, sec, relocs)
707 bfd * abfd ATTRIBUTE_UNUSED;
708 struct bfd_link_info * info ATTRIBUTE_UNUSED;
709 asection * sec ATTRIBUTE_UNUSED;
710 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED;
711 {
712 return true;
713 }
714
715 /* Look through the relocs for a section during the first phase.
716 Since we don't do .gots or .plts, we just need to consider the
717 virtual table relocs for gc. */
718
719 static boolean
720 fr30_elf_check_relocs (abfd, info, sec, relocs)
721 bfd *abfd;
722 struct bfd_link_info *info;
723 asection *sec;
724 const Elf_Internal_Rela *relocs;
725 {
726 Elf_Internal_Shdr *symtab_hdr;
727 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
728 const Elf_Internal_Rela *rel;
729 const Elf_Internal_Rela *rel_end;
730
731 if (info->relocateable)
732 return true;
733
734 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
735 sym_hashes = elf_sym_hashes (abfd);
736 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
737 if (!elf_bad_symtab (abfd))
738 sym_hashes_end -= symtab_hdr->sh_info;
739
740 rel_end = relocs + sec->reloc_count;
741 for (rel = relocs; rel < rel_end; rel++)
742 {
743 struct elf_link_hash_entry *h;
744 unsigned long r_symndx;
745
746 r_symndx = ELF32_R_SYM (rel->r_info);
747 if (r_symndx < symtab_hdr->sh_info)
748 h = NULL;
749 else
750 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
751
752 switch (ELF32_R_TYPE (rel->r_info))
753 {
754 /* This relocation describes the C++ object vtable hierarchy.
755 Reconstruct it for later use during GC. */
756 case R_FR30_GNU_VTINHERIT:
757 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
758 return false;
759 break;
760
761 /* This relocation describes which C++ vtable entries are actually
762 used. Record for later use during GC. */
763 case R_FR30_GNU_VTENTRY:
764 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
765 return false;
766 break;
767 }
768 }
769
770 return true;
771 }
772 \f
773 #define ELF_ARCH bfd_arch_fr30
774 #define ELF_MACHINE_CODE EM_FR30
775 #define ELF_MACHINE_ALT1 EM_CYGNUS_FR30
776 #define ELF_MAXPAGESIZE 0x1000
777
778 #define TARGET_BIG_SYM bfd_elf32_fr30_vec
779 #define TARGET_BIG_NAME "elf32-fr30"
780
781 #define elf_info_to_howto_rel NULL
782 #define elf_info_to_howto fr30_info_to_howto_rela
783 #define elf_backend_relocate_section fr30_elf_relocate_section
784 #define elf_backend_gc_mark_hook fr30_elf_gc_mark_hook
785 #define elf_backend_gc_sweep_hook fr30_elf_gc_sweep_hook
786 #define elf_backend_check_relocs fr30_elf_check_relocs
787
788 #define elf_backend_can_gc_sections 1
789 #define elf_backend_rela_normal 1
790
791 #define bfd_elf32_bfd_reloc_type_lookup fr30_reloc_type_lookup
792
793 #include "elf32-target.h"
GDB Binutils - Deliverables
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