1 /* FR30-specific support for 32-bit ELF.
2 Copyright (C) 1998-2016 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
19 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
29 fr30_elf_i20_reloc (bfd *, arelent *, asymbol *, void * data,
30 asection *, bfd *, char **error_message);
31 static bfd_reloc_status_type
32 fr30_elf_i32_reloc (bfd *, arelent *, asymbol *, void *,
33 asection *, bfd *, char **);
34
35 static reloc_howto_type fr30_elf_howto_table [] =
36 {
37 /* This reloc does nothing. */
38 HOWTO (R_FR30_NONE, /* type */
39 0, /* rightshift */
40 3, /* size (0 = byte, 1 = short, 2 = long) */
41 0, /* bitsize */
42 FALSE, /* pc_relative */
43 0, /* bitpos */
44 complain_overflow_dont, /* complain_on_overflow */
45 bfd_elf_generic_reloc, /* special_function */
46 "R_FR30_NONE", /* name */
47 FALSE, /* partial_inplace */
48 0, /* src_mask */
49 0, /* dst_mask */
50 FALSE), /* pcrel_offset */
51
52 /* An 8 bit absolute relocation. */
53 HOWTO (R_FR30_8, /* type */
54 0, /* rightshift */
55 1, /* size (0 = byte, 1 = short, 2 = long) */
56 8, /* bitsize */
57 FALSE, /* pc_relative */
58 4, /* bitpos */
59 complain_overflow_bitfield, /* complain_on_overflow */
60 bfd_elf_generic_reloc, /* special_function */
61 "R_FR30_8", /* name */
62 FALSE, /* partial_inplace */
63 0x0000, /* src_mask */
64 0x0ff0, /* dst_mask */
65 FALSE), /* pcrel_offset */
66
67 /* A 20 bit absolute relocation. */
68 HOWTO (R_FR30_20, /* type */
69 0, /* rightshift */
70 2, /* size (0 = byte, 1 = short, 2 = long) */
71 20, /* bitsize */
72 FALSE, /* pc_relative */
73 0, /* bitpos */
74 complain_overflow_bitfield, /* complain_on_overflow */
75 fr30_elf_i20_reloc, /* special_function */
76 "R_FR30_20", /* name */
77 FALSE, /* partial_inplace */
78 0x00000000, /* src_mask */
79 0x00f0ffff, /* dst_mask */
80 FALSE), /* pcrel_offset */
81
82 /* A 32 bit absolute relocation. */
83 HOWTO (R_FR30_32, /* type */
84 0, /* rightshift */
85 2, /* size (0 = byte, 1 = short, 2 = long) */
86 32, /* bitsize */
87 FALSE, /* pc_relative */
88 0, /* bitpos */
89 complain_overflow_bitfield, /* complain_on_overflow */
90 bfd_elf_generic_reloc, /* special_function */
91 "R_FR30_32", /* name */
92 FALSE, /* partial_inplace */
93 0x00000000, /* src_mask */
94 0xffffffff, /* dst_mask */
95 FALSE), /* pcrel_offset */
96
97 /* A 32 bit into 48 bits absolute relocation. */
98 HOWTO (R_FR30_48, /* type */
99 0, /* rightshift */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
101 32, /* bitsize */
102 FALSE, /* pc_relative */
103 0, /* bitpos */
104 complain_overflow_bitfield, /* complain_on_overflow */
105 fr30_elf_i32_reloc, /* special_function */
106 "R_FR30_48", /* name */
107 FALSE, /* partial_inplace */
108 0x00000000, /* src_mask */
109 0xffffffff, /* dst_mask */
110 FALSE), /* pcrel_offset */
111
112 /* A 6 bit absolute relocation. */
113 HOWTO (R_FR30_6_IN_4, /* type */
114 2, /* rightshift */
115 1, /* size (0 = byte, 1 = short, 2 = long) */
116 6, /* bitsize */
117 FALSE, /* pc_relative */
118 4, /* bitpos */
119 complain_overflow_unsigned, /* complain_on_overflow */
120 bfd_elf_generic_reloc, /* special_function */
121 "R_FR30_6_IN_4", /* name */
122 FALSE, /* partial_inplace */
123 0x0000, /* src_mask */
124 0x00f0, /* dst_mask */
125 FALSE), /* pcrel_offset */
126
127 /* An 8 bit absolute relocation. */
128 HOWTO (R_FR30_8_IN_8, /* type */
129 0, /* rightshift */
130 1, /* size (0 = byte, 1 = short, 2 = long) */
131 8, /* bitsize */
132 FALSE, /* pc_relative */
133 4, /* bitpos */
134 complain_overflow_signed, /* complain_on_overflow */
135 bfd_elf_generic_reloc,/* special_function */
136 "R_FR30_8_IN_8", /* name */
137 FALSE, /* partial_inplace */
138 0x0000, /* src_mask */
139 0x0ff0, /* dst_mask */
140 FALSE), /* pcrel_offset */
141
142 /* A 9 bit absolute relocation. */
143 HOWTO (R_FR30_9_IN_8, /* type */
144 1, /* rightshift */
145 1, /* size (0 = byte, 1 = short, 2 = long) */
146 9, /* bitsize */
147 FALSE, /* pc_relative */
148 4, /* bitpos */
149 complain_overflow_signed, /* complain_on_overflow */
150 bfd_elf_generic_reloc,/* special_function */
151 "R_FR30_9_IN_8", /* name */
152 FALSE, /* partial_inplace */
153 0x0000, /* src_mask */
154 0x0ff0, /* dst_mask */
155 FALSE), /* pcrel_offset */
156
157 /* A 10 bit absolute relocation. */
158 HOWTO (R_FR30_10_IN_8, /* type */
159 2, /* rightshift */
160 1, /* size (0 = byte, 1 = short, 2 = long) */
161 10, /* bitsize */
162 FALSE, /* pc_relative */
163 4, /* bitpos */
164 complain_overflow_signed, /* complain_on_overflow */
165 bfd_elf_generic_reloc,/* special_function */
166 "R_FR30_10_IN_8", /* name */
167 FALSE, /* partial_inplace */
168 0x0000, /* src_mask */
169 0x0ff0, /* dst_mask */
170 FALSE), /* pcrel_offset */
171
172 /* A PC relative 9 bit relocation, right shifted by 1. */
173 HOWTO (R_FR30_9_PCREL, /* type */
174 1, /* rightshift */
175 1, /* size (0 = byte, 1 = short, 2 = long) */
176 9, /* bitsize */
177 TRUE, /* pc_relative */
178 0, /* bitpos */
179 complain_overflow_signed, /* complain_on_overflow */
180 bfd_elf_generic_reloc, /* special_function */
181 "R_FR30_9_PCREL", /* name */
182 FALSE, /* partial_inplace */
183 0x0000, /* src_mask */
184 0x00ff, /* dst_mask */
185 FALSE), /* pcrel_offset */
186
187 /* A PC relative 12 bit relocation, right shifted by 1. */
188 HOWTO (R_FR30_12_PCREL, /* type */
189 1, /* rightshift */
190 1, /* size (0 = byte, 1 = short, 2 = long) */
191 12, /* bitsize */
192 TRUE, /* pc_relative */
193 0, /* bitpos */
194 complain_overflow_signed, /* complain_on_overflow */
195 bfd_elf_generic_reloc, /* special_function */
196 "R_FR30_12_PCREL", /* name */
197 FALSE, /* partial_inplace */
198 0x0000, /* src_mask */
199 0x07ff, /* dst_mask */
200 FALSE), /* pcrel_offset */
201 /* GNU extension to record C++ vtable hierarchy */
202 HOWTO (R_FR30_GNU_VTINHERIT, /* type */
203 0, /* rightshift */
204 2, /* size (0 = byte, 1 = short, 2 = long) */
205 0, /* bitsize */
206 FALSE, /* pc_relative */
207 0, /* bitpos */
208 complain_overflow_dont, /* complain_on_overflow */
209 NULL, /* special_function */
210 "R_FR30_GNU_VTINHERIT", /* name */
211 FALSE, /* partial_inplace */
212 0, /* src_mask */
213 0, /* dst_mask */
214 FALSE), /* pcrel_offset */
215
216 /* GNU extension to record C++ vtable member usage */
217 HOWTO (R_FR30_GNU_VTENTRY, /* type */
218 0, /* rightshift */
219 2, /* size (0 = byte, 1 = short, 2 = long) */
220 0, /* bitsize */
221 FALSE, /* pc_relative */
222 0, /* bitpos */
223 complain_overflow_dont, /* complain_on_overflow */
224 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
225 "R_FR30_GNU_VTENTRY", /* name */
226 FALSE, /* partial_inplace */
227 0, /* src_mask */
228 0, /* dst_mask */
229 FALSE), /* pcrel_offset */
230 };
231
232 /* Utility to actually perform an R_FR30_20 reloc. */
233
234 static bfd_reloc_status_type
fr30_elf_i20_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)235 fr30_elf_i20_reloc (bfd *abfd,
236 arelent *reloc_entry,
237 asymbol *symbol,
238 void * data,
239 asection *input_section,
240 bfd *output_bfd,
241 char **error_message ATTRIBUTE_UNUSED)
242 {
243 bfd_vma relocation;
244 unsigned long x;
245
246 /* This part is from bfd_elf_generic_reloc. */
247 if (output_bfd != (bfd *) NULL
248 && (symbol->flags & BSF_SECTION_SYM) == 0
249 && (! reloc_entry->howto->partial_inplace
250 || reloc_entry->addend == 0))
251 {
252 reloc_entry->address += input_section->output_offset;
253 return bfd_reloc_ok;
254 }
255
256 if (output_bfd != NULL)
257 /* FIXME: See bfd_perform_relocation. Is this right? */
258 return bfd_reloc_ok;
259
260 relocation =
261 symbol->value
262 + symbol->section->output_section->vma
263 + symbol->section->output_offset
264 + reloc_entry->addend;
265
266 if (relocation > (((bfd_vma) 1 << 20) - 1))
267 return bfd_reloc_overflow;
268
269 x = bfd_get_32 (abfd, (char *) data + reloc_entry->address);
270 x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4);
271 bfd_put_32 (abfd, (bfd_vma) x, (char *) data + reloc_entry->address);
272
273 return bfd_reloc_ok;
274 }
275
276 /* Utility to actually perform a R_FR30_48 reloc. */
277
278 static bfd_reloc_status_type
fr30_elf_i32_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)279 fr30_elf_i32_reloc (bfd *abfd,
280 arelent *reloc_entry,
281 asymbol *symbol,
282 void * data,
283 asection *input_section,
284 bfd *output_bfd,
285 char **error_message ATTRIBUTE_UNUSED)
286 {
287 bfd_vma relocation;
288
289 /* This part is from bfd_elf_generic_reloc. */
290 if (output_bfd != (bfd *) NULL
291 && (symbol->flags & BSF_SECTION_SYM) == 0
292 && (! reloc_entry->howto->partial_inplace
293 || reloc_entry->addend == 0))
294 {
295 reloc_entry->address += input_section->output_offset;
296 return bfd_reloc_ok;
297 }
298
299 if (output_bfd != NULL)
300 /* FIXME: See bfd_perform_relocation. Is this right? */
301 return bfd_reloc_ok;
302
303 relocation =
304 symbol->value
305 + symbol->section->output_section->vma
306 + symbol->section->output_offset
307 + reloc_entry->addend;
308
309 bfd_put_32 (abfd, relocation, (char *) data + reloc_entry->address + 2);
310
311 return bfd_reloc_ok;
312 }
313
314 /* Map BFD reloc types to FR30 ELF reloc types. */
315
316 struct fr30_reloc_map
317 {
318 bfd_reloc_code_real_type bfd_reloc_val;
319 unsigned int fr30_reloc_val;
320 };
321
322 static const struct fr30_reloc_map fr30_reloc_map [] =
323 {
324 { BFD_RELOC_NONE, R_FR30_NONE },
325 { BFD_RELOC_8, R_FR30_8 },
326 { BFD_RELOC_FR30_20, R_FR30_20 },
327 { BFD_RELOC_32, R_FR30_32 },
328 { BFD_RELOC_FR30_48, R_FR30_48 },
329 { BFD_RELOC_FR30_6_IN_4, R_FR30_6_IN_4 },
330 { BFD_RELOC_FR30_8_IN_8, R_FR30_8_IN_8 },
331 { BFD_RELOC_FR30_9_IN_8, R_FR30_9_IN_8 },
332 { BFD_RELOC_FR30_10_IN_8, R_FR30_10_IN_8 },
333 { BFD_RELOC_FR30_9_PCREL, R_FR30_9_PCREL },
334 { BFD_RELOC_FR30_12_PCREL, R_FR30_12_PCREL },
335 { BFD_RELOC_VTABLE_INHERIT, R_FR30_GNU_VTINHERIT },
336 { BFD_RELOC_VTABLE_ENTRY, R_FR30_GNU_VTENTRY },
337 };
338
339 static reloc_howto_type *
fr30_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)340 fr30_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
341 bfd_reloc_code_real_type code)
342 {
343 unsigned int i;
344
345 for (i = sizeof (fr30_reloc_map) / sizeof (fr30_reloc_map[0]);
346 i--;)
347 if (fr30_reloc_map [i].bfd_reloc_val == code)
348 return & fr30_elf_howto_table [fr30_reloc_map[i].fr30_reloc_val];
349
350 return NULL;
351 }
352
353 static reloc_howto_type *
fr30_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)354 fr30_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
355 {
356 unsigned int i;
357
358 for (i = 0;
359 i < sizeof (fr30_elf_howto_table) / sizeof (fr30_elf_howto_table[0]);
360 i++)
361 if (fr30_elf_howto_table[i].name != NULL
362 && strcasecmp (fr30_elf_howto_table[i].name, r_name) == 0)
363 return &fr30_elf_howto_table[i];
364
365 return NULL;
366 }
367
368 /* Set the howto pointer for an FR30 ELF reloc. */
369
370 static void
fr30_info_to_howto_rela(bfd * abfd ATTRIBUTE_UNUSED,arelent * cache_ptr,Elf_Internal_Rela * dst)371 fr30_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
372 arelent *cache_ptr,
373 Elf_Internal_Rela *dst)
374 {
375 unsigned int r_type;
376
377 r_type = ELF32_R_TYPE (dst->r_info);
378 if (r_type >= (unsigned int) R_FR30_max)
379 {
380 _bfd_error_handler (_("%B: invalid FR30 reloc number: %d"), abfd, r_type);
381 r_type = 0;
382 }
383 cache_ptr->howto = & fr30_elf_howto_table [r_type];
384 }
385
386 /* Perform a single relocation. By default we use the standard BFD
387 routines, but a few relocs, we have to do them ourselves. */
388
389 static bfd_reloc_status_type
fr30_final_link_relocate(reloc_howto_type * howto,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * rel,bfd_vma relocation)390 fr30_final_link_relocate (reloc_howto_type *howto,
391 bfd *input_bfd,
392 asection *input_section,
393 bfd_byte *contents,
394 Elf_Internal_Rela *rel,
395 bfd_vma relocation)
396 {
397 bfd_reloc_status_type r = bfd_reloc_ok;
398 bfd_vma x;
399 bfd_signed_vma srel;
400
401 switch (howto->type)
402 {
403 case R_FR30_20:
404 contents += rel->r_offset;
405 relocation += rel->r_addend;
406
407 if (relocation > ((1 << 20) - 1))
408 return bfd_reloc_overflow;
409
410 x = bfd_get_32 (input_bfd, contents);
411 x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4);
412 bfd_put_32 (input_bfd, x, contents);
413 break;
414
415 case R_FR30_48:
416 contents += rel->r_offset + 2;
417 relocation += rel->r_addend;
418 bfd_put_32 (input_bfd, relocation, contents);
419 break;
420
421 case R_FR30_9_PCREL:
422 contents += rel->r_offset + 1;
423 srel = (bfd_signed_vma) relocation;
424 srel += rel->r_addend;
425 srel -= rel->r_offset;
426 srel -= 2; /* Branch instructions add 2 to the PC... */
427 srel -= (input_section->output_section->vma +
428 input_section->output_offset);
429
430 if (srel & 1)
431 return bfd_reloc_outofrange;
432 if (srel > ((1 << 8) - 1) || (srel < - (1 << 8)))
433 return bfd_reloc_overflow;
434
435 bfd_put_8 (input_bfd, srel >> 1, contents);
436 break;
437
438 case R_FR30_12_PCREL:
439 contents += rel->r_offset;
440 srel = (bfd_signed_vma) relocation;
441 srel += rel->r_addend;
442 srel -= rel->r_offset;
443 srel -= 2; /* Branch instructions add 2 to the PC... */
444 srel -= (input_section->output_section->vma +
445 input_section->output_offset);
446
447 if (srel & 1)
448 return bfd_reloc_outofrange;
449 if (srel > ((1 << 11) - 1) || (srel < - (1 << 11)))
450 return bfd_reloc_overflow;
451
452 x = bfd_get_16 (input_bfd, contents);
453 x = (x & 0xf800) | ((srel >> 1) & 0x7ff);
454 bfd_put_16 (input_bfd, x, contents);
455 break;
456
457 default:
458 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
459 contents, rel->r_offset,
460 relocation, rel->r_addend);
461 }
462
463 return r;
464 }
465
466 /* Relocate an FR30 ELF section.
467
468 The RELOCATE_SECTION function is called by the new ELF backend linker
469 to handle the relocations for a section.
470
471 The relocs are always passed as Rela structures; if the section
472 actually uses Rel structures, the r_addend field will always be
473 zero.
474
475 This function is responsible for adjusting the section contents as
476 necessary, and (if using Rela relocs and generating a relocatable
477 output file) adjusting the reloc addend as necessary.
478
479 This function does not have to worry about setting the reloc
480 address or the reloc symbol index.
481
482 LOCAL_SYMS is a pointer to the swapped in local symbols.
483
484 LOCAL_SECTIONS is an array giving the section in the input file
485 corresponding to the st_shndx field of each local symbol.
486
487 The global hash table entry for the global symbols can be found
488 via elf_sym_hashes (input_bfd).
489
490 When generating relocatable output, this function must handle
491 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
492 going to be the section symbol corresponding to the output
493 section, which means that the addend must be adjusted
494 accordingly. */
495
496 static bfd_boolean
fr30_elf_relocate_section(bfd * output_bfd,struct bfd_link_info * info,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * relocs,Elf_Internal_Sym * local_syms,asection ** local_sections)497 fr30_elf_relocate_section (bfd *output_bfd,
498 struct bfd_link_info *info,
499 bfd *input_bfd,
500 asection *input_section,
501 bfd_byte *contents,
502 Elf_Internal_Rela *relocs,
503 Elf_Internal_Sym *local_syms,
504 asection **local_sections)
505 {
506 Elf_Internal_Shdr *symtab_hdr;
507 struct elf_link_hash_entry **sym_hashes;
508 Elf_Internal_Rela *rel;
509 Elf_Internal_Rela *relend;
510
511 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
512 sym_hashes = elf_sym_hashes (input_bfd);
513 relend = relocs + input_section->reloc_count;
514
515 for (rel = relocs; rel < relend; rel ++)
516 {
517 reloc_howto_type *howto;
518 unsigned long r_symndx;
519 Elf_Internal_Sym *sym;
520 asection *sec;
521 struct elf_link_hash_entry *h;
522 bfd_vma relocation;
523 bfd_reloc_status_type r;
524 const char *name;
525 int r_type;
526
527 r_type = ELF32_R_TYPE (rel->r_info);
528
529 if ( r_type == R_FR30_GNU_VTINHERIT
530 || r_type == R_FR30_GNU_VTENTRY)
531 continue;
532
533 r_symndx = ELF32_R_SYM (rel->r_info);
534
535 howto = fr30_elf_howto_table + ELF32_R_TYPE (rel->r_info);
536 h = NULL;
537 sym = NULL;
538 sec = NULL;
539
540 if (r_symndx < symtab_hdr->sh_info)
541 {
542 sym = local_syms + r_symndx;
543 sec = local_sections [r_symndx];
544 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
545
546 name = bfd_elf_string_from_elf_section
547 (input_bfd, symtab_hdr->sh_link, sym->st_name);
548 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
549 }
550 else
551 {
552 bfd_boolean unresolved_reloc, warned, ignored;
553
554 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
555 r_symndx, symtab_hdr, sym_hashes,
556 h, sec, relocation,
557 unresolved_reloc, warned, ignored);
558
559 name = h->root.root.string;
560 }
561
562 if (sec != NULL && discarded_section (sec))
563 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
564 rel, 1, relend, howto, 0, contents);
565
566 if (bfd_link_relocatable (info))
567 continue;
568
569 r = fr30_final_link_relocate (howto, input_bfd, input_section,
570 contents, rel, relocation);
571
572 if (r != bfd_reloc_ok)
573 {
574 const char * msg = (const char *) NULL;
575
576 switch (r)
577 {
578 case bfd_reloc_overflow:
579 (*info->callbacks->reloc_overflow)
580 (info, (h ? &h->root : NULL), name, howto->name,
581 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
582 break;
583
584 case bfd_reloc_undefined:
585 (*info->callbacks->undefined_symbol)
586 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
587 break;
588
589 case bfd_reloc_outofrange:
590 msg = _("internal error: out of range error");
591 break;
592
593 case bfd_reloc_notsupported:
594 msg = _("internal error: unsupported relocation error");
595 break;
596
597 case bfd_reloc_dangerous:
598 msg = _("internal error: dangerous relocation");
599 break;
600
601 default:
602 msg = _("internal error: unknown error");
603 break;
604 }
605
606 if (msg)
607 (*info->callbacks->warning) (info, msg, name, input_bfd,
608 input_section, rel->r_offset);
609 }
610 }
611
612 return TRUE;
613 }
614
615 /* Return the section that should be marked against GC for a given
616 relocation. */
617
618 static asection *
fr30_elf_gc_mark_hook(asection * sec,struct bfd_link_info * info,Elf_Internal_Rela * rel,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)619 fr30_elf_gc_mark_hook (asection *sec,
620 struct bfd_link_info *info,
621 Elf_Internal_Rela *rel,
622 struct elf_link_hash_entry *h,
623 Elf_Internal_Sym *sym)
624 {
625 if (h != NULL)
626 switch (ELF32_R_TYPE (rel->r_info))
627 {
628 case R_FR30_GNU_VTINHERIT:
629 case R_FR30_GNU_VTENTRY:
630 return NULL;
631 }
632
633 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
634 }
635
636 /* Look through the relocs for a section during the first phase.
637 Since we don't do .gots or .plts, we just need to consider the
638 virtual table relocs for gc. */
639
640 static bfd_boolean
fr30_elf_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)641 fr30_elf_check_relocs (bfd *abfd,
642 struct bfd_link_info *info,
643 asection *sec,
644 const Elf_Internal_Rela *relocs)
645 {
646 Elf_Internal_Shdr *symtab_hdr;
647 struct elf_link_hash_entry **sym_hashes;
648 const Elf_Internal_Rela *rel;
649 const Elf_Internal_Rela *rel_end;
650
651 if (bfd_link_relocatable (info))
652 return TRUE;
653
654 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
655 sym_hashes = elf_sym_hashes (abfd);
656
657 rel_end = relocs + sec->reloc_count;
658 for (rel = relocs; rel < rel_end; rel++)
659 {
660 struct elf_link_hash_entry *h;
661 unsigned long r_symndx;
662
663 r_symndx = ELF32_R_SYM (rel->r_info);
664 if (r_symndx < symtab_hdr->sh_info)
665 h = NULL;
666 else
667 {
668 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
669 while (h->root.type == bfd_link_hash_indirect
670 || h->root.type == bfd_link_hash_warning)
671 h = (struct elf_link_hash_entry *) h->root.u.i.link;
672
673 /* PR15323, ref flags aren't set for references in the same
674 object. */
675 h->root.non_ir_ref = 1;
676 }
677
678 switch (ELF32_R_TYPE (rel->r_info))
679 {
680 /* This relocation describes the C++ object vtable hierarchy.
681 Reconstruct it for later use during GC. */
682 case R_FR30_GNU_VTINHERIT:
683 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
684 return FALSE;
685 break;
686
687 /* This relocation describes which C++ vtable entries are actually
688 used. Record for later use during GC. */
689 case R_FR30_GNU_VTENTRY:
690 BFD_ASSERT (h != NULL);
691 if (h != NULL
692 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
693 return FALSE;
694 break;
695 }
696 }
697
698 return TRUE;
699 }
700
701 #define ELF_ARCH bfd_arch_fr30
702 #define ELF_MACHINE_CODE EM_FR30
703 #define ELF_MACHINE_ALT1 EM_CYGNUS_FR30
704 #define ELF_MAXPAGESIZE 0x1000
705
706 #define TARGET_BIG_SYM fr30_elf32_vec
707 #define TARGET_BIG_NAME "elf32-fr30"
708
709 #define elf_info_to_howto_rel NULL
710 #define elf_info_to_howto fr30_info_to_howto_rela
711 #define elf_backend_relocate_section fr30_elf_relocate_section
712 #define elf_backend_gc_mark_hook fr30_elf_gc_mark_hook
713 #define elf_backend_check_relocs fr30_elf_check_relocs
714
715 #define elf_backend_can_gc_sections 1
716 #define elf_backend_rela_normal 1
717
718 #define bfd_elf32_bfd_reloc_type_lookup fr30_reloc_type_lookup
719 #define bfd_elf32_bfd_reloc_name_lookup fr30_reloc_name_lookup
720
721 #include "elf32-target.h"
722