1 /* FR30-specific support for 32-bit ELF.
2 Copyright (C) 1998-2021 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 bool
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 /* xgettext:c-format */
381 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
382 abfd, r_type);
383 bfd_set_error (bfd_error_bad_value);
384 return false;
385 }
386 cache_ptr->howto = & fr30_elf_howto_table [r_type];
387 return true;
388 }
389
390 /* Perform a single relocation. By default we use the standard BFD
391 routines, but a few relocs, we have to do them ourselves. */
392
393 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)394 fr30_final_link_relocate (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
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 relocatable
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 relocatable 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 int
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)501 fr30_elf_relocate_section (bfd *output_bfd,
502 struct bfd_link_info *info,
503 bfd *input_bfd,
504 asection *input_section,
505 bfd_byte *contents,
506 Elf_Internal_Rela *relocs,
507 Elf_Internal_Sym *local_syms,
508 asection **local_sections)
509 {
510 Elf_Internal_Shdr *symtab_hdr;
511 struct elf_link_hash_entry **sym_hashes;
512 Elf_Internal_Rela *rel;
513 Elf_Internal_Rela *relend;
514
515 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
516 sym_hashes = elf_sym_hashes (input_bfd);
517 relend = relocs + input_section->reloc_count;
518
519 for (rel = relocs; rel < relend; rel ++)
520 {
521 reloc_howto_type *howto;
522 unsigned long r_symndx;
523 Elf_Internal_Sym *sym;
524 asection *sec;
525 struct elf_link_hash_entry *h;
526 bfd_vma relocation;
527 bfd_reloc_status_type r;
528 const char *name;
529 int r_type;
530
531 r_type = ELF32_R_TYPE (rel->r_info);
532
533 if ( r_type == R_FR30_GNU_VTINHERIT
534 || r_type == R_FR30_GNU_VTENTRY)
535 continue;
536
537 r_symndx = ELF32_R_SYM (rel->r_info);
538
539 howto = fr30_elf_howto_table + ELF32_R_TYPE (rel->r_info);
540 h = NULL;
541 sym = NULL;
542 sec = NULL;
543
544 if (r_symndx < symtab_hdr->sh_info)
545 {
546 sym = local_syms + r_symndx;
547 sec = local_sections [r_symndx];
548 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
549
550 name = bfd_elf_string_from_elf_section
551 (input_bfd, symtab_hdr->sh_link, sym->st_name);
552 name = name == NULL ? bfd_section_name (sec) : name;
553 }
554 else
555 {
556 bool unresolved_reloc, warned, ignored;
557
558 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
559 r_symndx, symtab_hdr, sym_hashes,
560 h, sec, relocation,
561 unresolved_reloc, warned, ignored);
562
563 name = h->root.root.string;
564 }
565
566 if (sec != NULL && discarded_section (sec))
567 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
568 rel, 1, relend, howto, 0, contents);
569
570 if (bfd_link_relocatable (info))
571 continue;
572
573 r = fr30_final_link_relocate (howto, input_bfd, input_section,
574 contents, rel, relocation);
575
576 if (r != bfd_reloc_ok)
577 {
578 const char * msg = (const char *) NULL;
579
580 switch (r)
581 {
582 case bfd_reloc_overflow:
583 (*info->callbacks->reloc_overflow)
584 (info, (h ? &h->root : NULL), name, howto->name,
585 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
586 break;
587
588 case bfd_reloc_undefined:
589 (*info->callbacks->undefined_symbol)
590 (info, name, input_bfd, input_section, rel->r_offset, true);
591 break;
592
593 case bfd_reloc_outofrange:
594 msg = _("internal error: out of range error");
595 break;
596
597 case bfd_reloc_notsupported:
598 msg = _("internal error: unsupported relocation error");
599 break;
600
601 case bfd_reloc_dangerous:
602 msg = _("internal error: dangerous relocation");
603 break;
604
605 default:
606 msg = _("internal error: unknown error");
607 break;
608 }
609
610 if (msg)
611 (*info->callbacks->warning) (info, msg, name, input_bfd,
612 input_section, rel->r_offset);
613 }
614 }
615
616 return true;
617 }
618
619 /* Return the section that should be marked against GC for a given
620 relocation. */
621
622 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)623 fr30_elf_gc_mark_hook (asection *sec,
624 struct bfd_link_info *info,
625 Elf_Internal_Rela *rel,
626 struct elf_link_hash_entry *h,
627 Elf_Internal_Sym *sym)
628 {
629 if (h != NULL)
630 switch (ELF32_R_TYPE (rel->r_info))
631 {
632 case R_FR30_GNU_VTINHERIT:
633 case R_FR30_GNU_VTENTRY:
634 return NULL;
635 }
636
637 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
638 }
639
640 /* Look through the relocs for a section during the first phase.
641 Since we don't do .gots or .plts, we just need to consider the
642 virtual table relocs for gc. */
643
644 static bool
fr30_elf_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)645 fr30_elf_check_relocs (bfd *abfd,
646 struct bfd_link_info *info,
647 asection *sec,
648 const Elf_Internal_Rela *relocs)
649 {
650 Elf_Internal_Shdr *symtab_hdr;
651 struct elf_link_hash_entry **sym_hashes;
652 const Elf_Internal_Rela *rel;
653 const Elf_Internal_Rela *rel_end;
654
655 if (bfd_link_relocatable (info))
656 return true;
657
658 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
659 sym_hashes = elf_sym_hashes (abfd);
660
661 rel_end = relocs + sec->reloc_count;
662 for (rel = relocs; rel < rel_end; rel++)
663 {
664 struct elf_link_hash_entry *h;
665 unsigned long r_symndx;
666
667 r_symndx = ELF32_R_SYM (rel->r_info);
668 if (r_symndx < symtab_hdr->sh_info)
669 h = NULL;
670 else
671 {
672 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
673 while (h->root.type == bfd_link_hash_indirect
674 || h->root.type == bfd_link_hash_warning)
675 h = (struct elf_link_hash_entry *) h->root.u.i.link;
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 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
691 return false;
692 break;
693 }
694 }
695
696 return true;
697 }
698
699 #define ELF_ARCH bfd_arch_fr30
700 #define ELF_MACHINE_CODE EM_FR30
701 #define ELF_MACHINE_ALT1 EM_CYGNUS_FR30
702 #define ELF_MAXPAGESIZE 0x1000
703
704 #define TARGET_BIG_SYM fr30_elf32_vec
705 #define TARGET_BIG_NAME "elf32-fr30"
706
707 #define elf_info_to_howto_rel NULL
708 #define elf_info_to_howto fr30_info_to_howto_rela
709 #define elf_backend_relocate_section fr30_elf_relocate_section
710 #define elf_backend_gc_mark_hook fr30_elf_gc_mark_hook
711 #define elf_backend_check_relocs fr30_elf_check_relocs
712
713 #define elf_backend_can_gc_sections 1
714 #define elf_backend_rela_normal 1
715
716 #define bfd_elf32_bfd_reloc_type_lookup fr30_reloc_type_lookup
717 #define bfd_elf32_bfd_reloc_name_lookup fr30_reloc_name_lookup
718
719 #include "elf32-target.h"
720