aboutsummaryrefslogtreecommitdiff
path: root/bfd/elf64-sparc.c
blob: f9d4c81709225aec7d455d4c40e9ad094c3e224b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
/* SPARC-specific support for 64-bit ELF
   Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
   2003, 2004, 2005 Free Software Foundation, Inc.

   This file is part of BFD, the Binary File Descriptor library.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */

#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/sparc.h"
#include "opcode/sparc.h"
#include "elfxx-sparc.h"

/* In case we're on a 32-bit machine, construct a 64-bit "-1" value.  */
#define MINUS_ONE (~ (bfd_vma) 0)

/* Due to the way how we handle R_SPARC_OLO10, each entry in a SHT_RELA
   section can represent up to two relocs, we must tell the user to allocate
   more space.  */

static long
elf64_sparc_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
{
  return (sec->reloc_count * 2 + 1) * sizeof (arelent *);
}

static long
elf64_sparc_get_dynamic_reloc_upper_bound (bfd *abfd)
{
  return _bfd_elf_get_dynamic_reloc_upper_bound (abfd) * 2;
}

/* Read  relocations for ASECT from REL_HDR.  There are RELOC_COUNT of
   them.  We cannot use generic elf routines for this,  because R_SPARC_OLO10
   has secondary addend in ELF64_R_TYPE_DATA.  We handle it as two relocations
   for the same location,  R_SPARC_LO10 and R_SPARC_13.  */

static bfd_boolean
elf64_sparc_slurp_one_reloc_table (bfd *abfd, asection *asect,
				   Elf_Internal_Shdr *rel_hdr,
				   asymbol **symbols, bfd_boolean dynamic)
{
  PTR allocated = NULL;
  bfd_byte *native_relocs;
  arelent *relent;
  unsigned int i;
  int entsize;
  bfd_size_type count;
  arelent *relents;

  allocated = (PTR) bfd_malloc (rel_hdr->sh_size);
  if (allocated == NULL)
    goto error_return;

  if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0
      || bfd_bread (allocated, rel_hdr->sh_size, abfd) != rel_hdr->sh_size)
    goto error_return;

  native_relocs = (bfd_byte *) allocated;

  relents = asect->relocation + canon_reloc_count (asect);

  entsize = rel_hdr->sh_entsize;
  BFD_ASSERT (entsize == sizeof (Elf64_External_Rela));

  count = rel_hdr->sh_size / entsize;

  for (i = 0, relent = relents; i < count;
       i++, relent++, native_relocs += entsize)
    {
      Elf_Internal_Rela rela;
      unsigned int r_type;

      bfd_elf64_swap_reloca_in (abfd, native_relocs, &rela);

      /* The address of an ELF reloc is section relative for an object
	 file, and absolute for an executable file or shared library.
	 The address of a normal BFD reloc is always section relative,
	 and the address of a dynamic reloc is absolute..  */
      if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic)
	relent->address = rela.r_offset;
      else
	relent->address = rela.r_offset - asect->vma;

      if (ELF64_R_SYM (rela.r_info) == 0)
	relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
      else
	{
	  asymbol **ps, *s;

	  ps = symbols + ELF64_R_SYM (rela.r_info) - 1;
	  s = *ps;

	  /* Canonicalize ELF section symbols.  FIXME: Why?  */
	  if ((s->flags & BSF_SECTION_SYM) == 0)
	    relent->sym_ptr_ptr = ps;
	  else
	    relent->sym_ptr_ptr = s->section->symbol_ptr_ptr;
	}

      relent->addend = rela.r_addend;

      r_type = ELF64_R_TYPE_ID (rela.r_info);
      if (r_type == R_SPARC_OLO10)
	{
	  relent->howto = _bfd_sparc_elf_info_to_howto_ptr (R_SPARC_LO10);
	  relent[1].address = relent->address;
	  relent++;
	  relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
	  relent->addend = ELF64_R_TYPE_DATA (rela.r_info);
	  relent->howto = _bfd_sparc_elf_info_to_howto_ptr (R_SPARC_13);
	}
      else
	relent->howto = _bfd_sparc_elf_info_to_howto_ptr (r_type);
    }

  canon_reloc_count (asect) += relent - relents;

  if (allocated != NULL)
    free (allocated);

  return TRUE;

 error_return:
  if (allocated != NULL)
    free (allocated);
  return FALSE;
}

/* Read in and swap the external relocs.  */

static bfd_boolean
elf64_sparc_slurp_reloc_table (bfd *abfd, asection *asect,
			       asymbol **symbols, bfd_boolean dynamic)
{
  struct bfd_elf_section_data * const d = elf_section_data (asect);
  Elf_Internal_Shdr *rel_hdr;
  Elf_Internal_Shdr *rel_hdr2;
  bfd_size_type amt;

  if (asect->relocation != NULL)
    return TRUE;

  if (! dynamic)
    {
      if ((asect->flags & SEC_RELOC) == 0
	  || asect->reloc_count == 0)
	return TRUE;

      rel_hdr = &d->rel_hdr;
      rel_hdr2 = d->rel_hdr2;

      BFD_ASSERT (asect->rel_filepos == rel_hdr->sh_offset
		  || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset));
    }
  else
    {
      /* Note that ASECT->RELOC_COUNT tends not to be accurate in this
	 case because relocations against this section may use the
	 dynamic symbol table, and in that case bfd_section_from_shdr
	 in elf.c does not update the RELOC_COUNT.  */
      if (asect->size == 0)
	return TRUE;

      rel_hdr = &d->this_hdr;
      asect->reloc_count = NUM_SHDR_ENTRIES (rel_hdr);
      rel_hdr2 = NULL;
    }

  amt = asect->reloc_count;
  amt *= 2 * sizeof (arelent);
  asect->relocation = (arelent *) bfd_alloc (abfd, amt);
  if (asect->relocation == NULL)
    return FALSE;

  /* The elf64_sparc_slurp_one_reloc_table routine increments
     canon_reloc_count.  */
  canon_reloc_count (asect) = 0;

  if (!elf64_sparc_slurp_one_reloc_table (abfd, asect, rel_hdr, symbols,
					  dynamic))
    return FALSE;

  if (rel_hdr2
      && !elf64_sparc_slurp_one_reloc_table (abfd, asect, rel_hdr2, symbols,
					     dynamic))
    return FALSE;

  return TRUE;
}

/* Canonicalize the relocs.  */

static long
elf64_sparc_canonicalize_reloc (bfd *abfd, sec_ptr section,
				arelent **relptr, asymbol **symbols)
{
  arelent *tblptr;
  unsigned int i;
  const struct elf_backend_data *bed = get_elf_backend_data (abfd);

  if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
    return -1;

  tblptr = section->relocation;
  for (i = 0; i < canon_reloc_count (section); i++)
    *relptr++ = tblptr++;

  *relptr = NULL;

  return canon_reloc_count (section);
}


/* Canonicalize the dynamic relocation entries.  Note that we return
   the dynamic relocations as a single block, although they are
   actually associated with particular sections; the interface, which
   was designed for SunOS style shared libraries, expects that there
   is only one set of dynamic relocs.  Any section that was actually
   installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
   the dynamic symbol table, is considered to be a dynamic reloc
   section.  */

static long
elf64_sparc_canonicalize_dynamic_reloc (bfd *abfd, arelent **storage,
					asymbol **syms)
{
  asection *s;
  long ret;

  if (elf_dynsymtab (abfd) == 0)
    {
      bfd_set_error (bfd_error_invalid_operation);
      return -1;
    }

  ret = 0;
  for (s = abfd->sections; s != NULL; s = s->next)
    {
      if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
	  && (elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
	{
	  arelent *p;
	  long count, i;

	  if (! elf64_sparc_slurp_reloc_table (abfd, s, syms, TRUE))
	    return -1;
	  count = canon_reloc_count (s);
	  p = s->relocation;
	  for (i = 0; i < count; i++)
	    *storage++ = p++;
	  ret += count;
	}
    }

  *storage = NULL;

  return ret;
}

/* Write out the relocs.  */

static void
elf64_sparc_write_relocs (bfd *abfd, asection *sec, PTR data)
{
  bfd_boolean *failedp = (bfd_boolean *) data;
  Elf_Internal_Shdr *rela_hdr;
  bfd_vma addr_offset;
  Elf64_External_Rela *outbound_relocas, *src_rela;
  unsigned int idx, count;
  asymbol *last_sym = 0;
  int last_sym_idx = 0;

  /* If we have already failed, don't do anything.  */
  if (*failedp)
    return;

  if ((sec->flags & SEC_RELOC) == 0)
    return;

  /* The linker backend writes the relocs out itself, and sets the
     reloc_count field to zero to inhibit writing them here.  Also,
     sometimes the SEC_RELOC flag gets set even when there aren't any
     relocs.  */
  if (sec->reloc_count == 0)
    return;

  /* We can combine two relocs that refer to the same address
     into R_SPARC_OLO10 if first one is R_SPARC_LO10 and the
     latter is R_SPARC_13 with no associated symbol.  */
  count = 0;
  for (idx = 0; idx < sec->reloc_count; idx++)
    {
      bfd_vma addr;

      ++count;

      addr = sec->orelocation[idx]->address;
      if (sec->orelocation[idx]->howto->type == R_SPARC_LO10
	  && idx < sec->reloc_count - 1)
	{
	  arelent *r = sec->orelocation[idx + 1];

	  if (r->howto->type == R_SPARC_13
	      && r->address == addr
	      && bfd_is_abs_section ((*r->sym_ptr_ptr)->section)
	      && (*r->sym_ptr_ptr)->value == 0)
	    ++idx;
	}
    }

  rela_hdr = &elf_section_data (sec)->rel_hdr;

  rela_hdr->sh_size = rela_hdr->sh_entsize * count;
  rela_hdr->contents = (PTR) bfd_alloc (abfd, rela_hdr->sh_size);
  if (rela_hdr->contents == NULL)
    {
      *failedp = TRUE;
      return;
    }

  /* Figure out whether the relocations are RELA or REL relocations.  */
  if (rela_hdr->sh_type != SHT_RELA)
    abort ();

  /* The address of an ELF reloc is section relative for an object
     file, and absolute for an executable file or shared library.
     The address of a BFD reloc is always section relative.  */
  addr_offset = 0;
  if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
    addr_offset = sec->vma;

  /* orelocation has the data, reloc_count has the count...  */
  outbound_relocas = (Elf64_External_Rela *) rela_hdr->contents;
  src_rela = outbound_relocas;

  for (idx = 0; idx < sec->reloc_count; idx++)
    {
      Elf_Internal_Rela dst_rela;
      arelent *ptr;
      asymbol *sym;
      int n;

      ptr = sec->orelocation[idx];
      sym = *ptr->sym_ptr_ptr;
      if (sym == last_sym)
	n = last_sym_idx;
      else if (bfd_is_abs_section (sym->section) && sym->value == 0)
	n = STN_UNDEF;
      else
	{
	  last_sym = sym;
	  n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym);
	  if (n < 0)
	    {
	      *failedp = TRUE;
	      return;
	    }
	  last_sym_idx = n;
	}

      if ((*ptr->sym_ptr_ptr)->the_bfd != NULL
	  && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec
	  && ! _bfd_elf_validate_reloc (abfd, ptr))
	{
	  *failedp = TRUE;
	  return;
	}

      if (ptr->howto->type == R_SPARC_LO10
	  && idx < sec->reloc_count - 1)
	{
	  arelent *r = sec->orelocation[idx + 1];

	  if (r->howto->type == R_SPARC_13
	      && r->address == ptr->address
	      && bfd_is_abs_section ((*r->sym_ptr_ptr)->section)
	      && (*r->sym_ptr_ptr)->value == 0)
	    {
	      idx++;
	      dst_rela.r_info
		= ELF64_R_INFO (n, ELF64_R_TYPE_INFO (r->addend,
						      R_SPARC_OLO10));
	    }
	  else
	    dst_rela.r_info = ELF64_R_INFO (n, R_SPARC_LO10);
	}
      else
	dst_rela.r_info = ELF64_R_INFO (n, ptr->howto->type);

      dst_rela.r_offset = ptr->address + addr_offset;
      dst_rela.r_addend = ptr->addend;

      bfd_elf64_swap_reloca_out (abfd, &dst_rela, (bfd_byte *) src_rela);
      ++src_rela;
    }
}

/* Hook called by the linker routine which adds symbols from an object
   file.  We use it for STT_REGISTER symbols.  */

static bfd_boolean
elf64_sparc_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
			     Elf_Internal_Sym *sym, const char **namep,
			     flagword *flagsp ATTRIBUTE_UNUSED,
			     asection **secp ATTRIBUTE_UNUSED,
			     bfd_vma *valp ATTRIBUTE_UNUSED)
{
  static const char *const stt_types[] = { "NOTYPE", "OBJECT", "FUNCTION" };

  if (ELF_ST_TYPE (sym->st_info) == STT_REGISTER)
    {
      int reg;
      struct _bfd_sparc_elf_app_reg *p;

      reg = (int)sym->st_value;
      switch (reg & ~1)
	{
	case 2: reg -= 2; break;
	case 6: reg -= 4; break;
	default:
          (*_bfd_error_handler)
            (_("%B: Only registers %%g[2367] can be declared using STT_REGISTER"),
             abfd);
	  return FALSE;
	}

      if (info->hash->creator != abfd->xvec
	  || (abfd->flags & DYNAMIC) != 0)
        {
	  /* STT_REGISTER only works when linking an elf64_sparc object.
	     If STT_REGISTER comes from a dynamic object, don't put it into
	     the output bfd.  The dynamic linker will recheck it.  */
	  *namep = NULL;
	  return TRUE;
        }

      p = _bfd_sparc_elf_hash_table(info)->app_regs + reg;

      if (p->name != NULL && strcmp (p->name, *namep))
	{
          (*_bfd_error_handler)
            (_("Register %%g%d used incompatibly: %s in %B, previously %s in %B"),
             abfd, p->abfd, (int) sym->st_value,
             **namep ? *namep : "#scratch",
             *p->name ? p->name : "#scratch");
	  return FALSE;
	}

      if (p->name == NULL)
	{
	  if (**namep)
	    {
	      struct elf_link_hash_entry *h;

	      h = (struct elf_link_hash_entry *)
		bfd_link_hash_lookup (info->hash, *namep, FALSE, FALSE, FALSE);

	      if (h != NULL)
		{
		  unsigned char type = h->type;

		  if (type > STT_FUNC)
		    type = 0;
		  (*_bfd_error_handler)
		    (_("Symbol `%s' has differing types: REGISTER in %B, previously %s in %B"),
		     abfd, p->abfd, *namep, stt_types[type]);
		  return FALSE;
		}

	      p->name = bfd_hash_allocate (&info->hash->table,
					   strlen (*namep) + 1);
	      if (!p->name)
		return FALSE;

	      strcpy (p->name, *namep);
	    }
	  else
	    p->name = "";
	  p->bind = ELF_ST_BIND (sym->st_info);
	  p->abfd = abfd;
	  p->shndx = sym->st_shndx;
	}
      else
	{
	  if (p->bind == STB_WEAK
	      && ELF_ST_BIND (sym->st_info) == STB_GLOBAL)
	    {
	      p->bind = STB_GLOBAL;
	      p->abfd = abfd;
	    }
	}
      *namep = NULL;
      return TRUE;
    }
  else if (*namep && **namep
	   && info->hash->creator == abfd->xvec)
    {
      int i;
      struct _bfd_sparc_elf_app_reg *p;

      p = _bfd_sparc_elf_hash_table(info)->app_regs;
      for (i = 0; i < 4; i++, p++)
	if (p->name != NULL && ! strcmp (p->name, *namep))
	  {
	    unsigned char type = ELF_ST_TYPE (sym->st_info);

	    if (type > STT_FUNC)
	      type = 0;
	    (*_bfd_error_handler)
	      (_("Symbol `%s' has differing types: %s in %B, previously REGISTER in %B"),
	       abfd, p->abfd, *namep, stt_types[type]);
	    return FALSE;
	  }
    }
  return TRUE;
}

/* This function takes care of emitting STT_REGISTER symbols
   which we cannot easily keep in the symbol hash table.  */

static bfd_boolean
elf64_sparc_output_arch_syms (bfd *output_bfd ATTRIBUTE_UNUSED,
			      struct bfd_link_info *info,
			      PTR finfo, bfd_boolean (*func) (PTR, const char *,
							      Elf_Internal_Sym *,
							      asection *,
							      struct elf_link_hash_entry *))
{
  int reg;
  struct _bfd_sparc_elf_app_reg *app_regs =
    _bfd_sparc_elf_hash_table(info)->app_regs;
  Elf_Internal_Sym sym;

  /* We arranged in size_dynamic_sections to put the STT_REGISTER entries
     at the end of the dynlocal list, so they came at the end of the local
     symbols in the symtab.  Except that they aren't STB_LOCAL, so we need
     to back up symtab->sh_info.  */
  if (elf_hash_table (info)->dynlocal)
    {
      bfd * dynobj = elf_hash_table (info)->dynobj;
      asection *dynsymsec = bfd_get_section_by_name (dynobj, ".dynsym");
      struct elf_link_local_dynamic_entry *e;

      for (e = elf_hash_table (info)->dynlocal; e ; e = e->next)
	if (e->input_indx == -1)
	  break;
      if (e)
	{
	  elf_section_data (dynsymsec->output_section)->this_hdr.sh_info
	    = e->dynindx;
	}
    }

  if (info->strip == strip_all)
    return TRUE;

  for (reg = 0; reg < 4; reg++)
    if (app_regs [reg].name != NULL)
      {
	if (info->strip == strip_some
	    && bfd_hash_lookup (info->keep_hash,
				app_regs [reg].name,
				FALSE, FALSE) == NULL)
	  continue;

	sym.st_value = reg < 2 ? reg + 2 : reg + 4;
	sym.st_size = 0;
	sym.st_other = 0;
	sym.st_info = ELF_ST_INFO (app_regs [reg].bind, STT_REGISTER);
	sym.st_shndx = app_regs [reg].shndx;
	if (! (*func) (finfo, app_regs [reg].name, &sym,
		       sym.st_shndx == SHN_ABS
			 ? bfd_abs_section_ptr : bfd_und_section_ptr,
		       NULL))
	  return FALSE;
      }

  return TRUE;
}

static int
elf64_sparc_get_symbol_type (Elf_Internal_Sym *elf_sym, int type)
{
  if (ELF_ST_TYPE (elf_sym->st_info) == STT_REGISTER)
    return STT_REGISTER;
  else
    return type;
}

/* A STB_GLOBAL,STT_REGISTER symbol should be BSF_GLOBAL
   even in SHN_UNDEF section.  */

static void
elf64_sparc_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *asym)
{
  elf_symbol_type *elfsym;

  elfsym = (elf_symbol_type *) asym;
  if (elfsym->internal_elf_sym.st_info
      == ELF_ST_INFO (STB_GLOBAL, STT_REGISTER))
    {
      asym->flags |= BSF_GLOBAL;
    }
}


/* Functions for dealing with the e_flags field.  */

/* Merge backend specific data from an object file to the output
   object file when linking.  */

static bfd_boolean
elf64_sparc_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
{
  bfd_boolean error;
  flagword new_flags, old_flags;
  int new_mm, old_mm;

  if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
      || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
    return TRUE;

  new_flags = elf_elfheader (ibfd)->e_flags;
  old_flags = elf_elfheader (obfd)->e_flags;

  if (!elf_flags_init (obfd))   /* First call, no flags set */
    {
      elf_flags_init (obfd) = TRUE;
      elf_elfheader (obfd)->e_flags = new_flags;
    }

  else if (new_flags == old_flags)      /* Compatible flags are ok */
    ;

  else                                  /* Incompatible flags */
    {
      error = FALSE;

#define EF_SPARC_ISA_EXTENSIONS \
  (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3 | EF_SPARC_HAL_R1)

      if ((ibfd->flags & DYNAMIC) != 0)
	{
	  /* We don't want dynamic objects memory ordering and
	     architecture to have any role. That's what dynamic linker
	     should do.  */
	  new_flags &= ~(EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS);
	  new_flags |= (old_flags
			& (EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS));
	}
      else
	{
	  /* Choose the highest architecture requirements.  */
	  old_flags |= (new_flags & EF_SPARC_ISA_EXTENSIONS);
	  new_flags |= (old_flags & EF_SPARC_ISA_EXTENSIONS);
	  if ((old_flags & (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3))
	      && (old_flags & EF_SPARC_HAL_R1))
	    {
	      error = TRUE;
	      (*_bfd_error_handler)
		(_("%B: linking UltraSPARC specific with HAL specific code"),
		 ibfd);
	    }
	  /* Choose the most restrictive memory ordering.  */
	  old_mm = (old_flags & EF_SPARCV9_MM);
	  new_mm = (new_flags & EF_SPARCV9_MM);
	  old_flags &= ~EF_SPARCV9_MM;
	  new_flags &= ~EF_SPARCV9_MM;
	  if (new_mm < old_mm)
	    old_mm = new_mm;
	  old_flags |= old_mm;
	  new_flags |= old_mm;
	}

      /* Warn about any other mismatches */
      if (new_flags != old_flags)
        {
          error = TRUE;
          (*_bfd_error_handler)
            (_("%B: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
             ibfd, (long) new_flags, (long) old_flags);
        }

      elf_elfheader (obfd)->e_flags = old_flags;

      if (error)
        {
          bfd_set_error (bfd_error_bad_value);
          return FALSE;
        }
    }
  return TRUE;
}

/* MARCO: Set the correct entry size for the .stab section.  */

static bfd_boolean
elf64_sparc_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
			   Elf_Internal_Shdr *hdr ATTRIBUTE_UNUSED,
			   asection *sec)
{
  const char *name;

  name = bfd_get_section_name (abfd, sec);

  if (strcmp (name, ".stab") == 0)
    {
      /* Even in the 64bit case the stab entries are only 12 bytes long.  */
      elf_section_data (sec)->this_hdr.sh_entsize = 12;
    }

  return TRUE;
}

/* Print a STT_REGISTER symbol to file FILE.  */

static const char *
elf64_sparc_print_symbol_all (bfd *abfd ATTRIBUTE_UNUSED, PTR filep,
			      asymbol *symbol)
{
  FILE *file = (FILE *) filep;
  int reg, type;

  if (ELF_ST_TYPE (((elf_symbol_type *) symbol)->internal_elf_sym.st_info)
      != STT_REGISTER)
    return NULL;

  reg = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
  type = symbol->flags;
  fprintf (file, "REG_%c%c%11s%c%c    R", "GOLI" [reg / 8], '0' + (reg & 7), "",
		 ((type & BSF_LOCAL)
		  ? (type & BSF_GLOBAL) ? '!' : 'l'
	          : (type & BSF_GLOBAL) ? 'g' : ' '),
	         (type & BSF_WEAK) ? 'w' : ' ');
  if (symbol->name == NULL || symbol->name [0] == '\0')
    return "#scratch";
  else
    return symbol->name;
}

static enum elf_reloc_type_class
elf64_sparc_reloc_type_class (const Elf_Internal_Rela *rela)
{
  switch ((int) ELF64_R_TYPE (rela->r_info))
    {
    case R_SPARC_RELATIVE:
      return reloc_class_relative;
    case R_SPARC_JMP_SLOT:
      return reloc_class_plt;
    case R_SPARC_COPY:
      return reloc_class_copy;
    default:
      return reloc_class_normal;
    }
}

/* Relocations in the 64 bit SPARC ELF ABI are more complex than in
   standard ELF, because R_SPARC_OLO10 has secondary addend in
   ELF64_R_TYPE_DATA field.  This structure is used to redirect the
   relocation handling routines.  */

const struct elf_size_info elf64_sparc_size_info =
{
  sizeof (Elf64_External_Ehdr),
  sizeof (Elf64_External_Phdr),
  sizeof (Elf64_External_Shdr),
  sizeof (Elf64_External_Rel),
  sizeof (Elf64_External_Rela),
  sizeof (Elf64_External_Sym),
  sizeof (Elf64_External_Dyn),
  sizeof (Elf_External_Note),
  4,		/* hash-table entry size.  */
  /* Internal relocations per external relocations.
     For link purposes we use just 1 internal per
     1 external, for assembly and slurp symbol table
     we use 2.  */
  1,
  64,		/* arch_size.  */
  3,		/* log_file_align.  */
  ELFCLASS64,
  EV_CURRENT,
  bfd_elf64_write_out_phdrs,
  bfd_elf64_write_shdrs_and_ehdr,
  elf64_sparc_write_relocs,
  bfd_elf64_swap_symbol_in,
  bfd_elf64_swap_symbol_out,
  elf64_sparc_slurp_reloc_table,
  bfd_elf64_slurp_symbol_table,
  bfd_elf64_swap_dyn_in,
  bfd_elf64_swap_dyn_out,
  bfd_elf64_swap_reloc_in,
  bfd_elf64_swap_reloc_out,
  bfd_elf64_swap_reloca_in,
  bfd_elf64_swap_reloca_out
};

#define TARGET_BIG_SYM	bfd_elf64_sparc_vec
#define TARGET_BIG_NAME	"elf64-sparc"
#define ELF_ARCH	bfd_arch_sparc
#define ELF_MAXPAGESIZE 0x100000
#define ELF_COMMONPAGESIZE 0x2000

/* This is the official ABI value.  */
#define ELF_MACHINE_CODE EM_SPARCV9

/* This is the value that we used before the ABI was released.  */
#define ELF_MACHINE_ALT1 EM_OLD_SPARCV9

#define elf_backend_reloc_type_class \
  elf64_sparc_reloc_type_class
#define bfd_elf64_get_reloc_upper_bound \
  elf64_sparc_get_reloc_upper_bound
#define bfd_elf64_get_dynamic_reloc_upper_bound \
  elf64_sparc_get_dynamic_reloc_upper_bound
#define bfd_elf64_canonicalize_reloc \
  elf64_sparc_canonicalize_reloc
#define bfd_elf64_canonicalize_dynamic_reloc \
  elf64_sparc_canonicalize_dynamic_reloc
#define elf_backend_add_symbol_hook \
  elf64_sparc_add_symbol_hook
#define elf_backend_get_symbol_type \
  elf64_sparc_get_symbol_type
#define elf_backend_symbol_processing \
  elf64_sparc_symbol_processing
#define elf_backend_print_symbol_all \
  elf64_sparc_print_symbol_all
#define elf_backend_output_arch_syms \
  elf64_sparc_output_arch_syms
#define bfd_elf64_bfd_merge_private_bfd_data \
  elf64_sparc_merge_private_bfd_data
#define elf_backend_fake_sections \
  elf64_sparc_fake_sections
#define elf_backend_size_info \
  elf64_sparc_size_info

#define elf_backend_plt_sym_val	\
  _bfd_sparc_elf_plt_sym_val
#define bfd_elf64_bfd_link_hash_table_create \
  _bfd_sparc_elf_link_hash_table_create
#define elf_info_to_howto \
  _bfd_sparc_elf_info_to_howto
#define elf_backend_copy_indirect_symbol \
  _bfd_sparc_elf_copy_indirect_symbol
#define bfd_elf64_bfd_reloc_type_lookup \
  _bfd_sparc_elf_reloc_type_lookup
#define bfd_elf64_bfd_relax_section \
  _bfd_sparc_elf_relax_section
#define bfd_elf64_new_section_hook \
  _bfd_sparc_elf_new_section_hook

#define elf_backend_create_dynamic_sections \
  _bfd_sparc_elf_create_dynamic_sections
#define elf_backend_check_relocs \
  _bfd_sparc_elf_check_relocs
#define elf_backend_adjust_dynamic_symbol \
  _bfd_sparc_elf_adjust_dynamic_symbol
#define elf_backend_omit_section_dynsym \
  _bfd_sparc_elf_omit_section_dynsym
#define elf_backend_size_dynamic_sections \
  _bfd_sparc_elf_size_dynamic_sections
#define elf_backend_relocate_section \
  _bfd_sparc_elf_relocate_section
#define elf_backend_finish_dynamic_symbol \
  _bfd_sparc_elf_finish_dynamic_symbol
#define elf_backend_finish_dynamic_sections \
  _bfd_sparc_elf_finish_dynamic_sections

#define bfd_elf64_mkobject \
  _bfd_sparc_elf_mkobject
#define elf_backend_object_p \
  _bfd_sparc_elf_object_p
#define elf_backend_gc_mark_hook \
  _bfd_sparc_elf_gc_mark_hook
#define elf_backend_gc_sweep_hook \
  _bfd_sparc_elf_gc_sweep_hook
#define elf_backend_init_index_section \
  _bfd_elf_init_1_index_section

#define elf_backend_can_gc_sections 1
#define elf_backend_can_refcount 1
#define elf_backend_want_got_plt 0
#define elf_backend_plt_readonly 0
#define elf_backend_want_plt_sym 1
#define elf_backend_got_header_size 8
#define elf_backend_rela_normal 1

/* Section 5.2.4 of the ABI specifies a 256-byte boundary for the table.  */
#define elf_backend_plt_alignment 8

#include "elf64-target.h"

/* FreeBSD support */
#undef  TARGET_BIG_SYM
#define TARGET_BIG_SYM bfd_elf64_sparc_freebsd_vec
#undef  TARGET_BIG_NAME
#define TARGET_BIG_NAME "elf64-sparc-freebsd"
#undef	ELF_OSABI
#define	ELF_OSABI ELFOSABI_FREEBSD

#undef  elf_backend_post_process_headers
#define elf_backend_post_process_headers	_bfd_elf_set_osabi
#undef  elf64_bed
#define elf64_bed				elf64_sparc_fbsd_bed

#include "elf64-target.h"