summaryrefslogtreecommitdiff
path: root/bfd/elf32-iq2000.c
blob: fca8b2604684494597a91d1a805927a814147a71 (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
/* IQ2000-specific support for 32-bit ELF.
   Copyright (C) 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., 59 Temple Place - Suite 330, Boston, MA 02110-1301, USA.  */

#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/iq2000.h"

/* Forward declarations.  */

static bfd_reloc_status_type iq2000_elf_howto_hi16_reloc (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);


static reloc_howto_type iq2000_elf_howto_table [] =
{
  /* This reloc does nothing.  */

  HOWTO (R_IQ2000_NONE,		     /* type */
	 0,			     /* rightshift */
	 2,			     /* size (0 = byte, 1 = short, 2 = long) */
	 32,			     /* bitsize */
	 FALSE,			     /* pc_relative */
	 0,			     /* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	     /* special_function */
	 "R_IQ2000_NONE",	     /* name */
	 FALSE,			     /* partial_inplace */
	 0,			     /* src_mask */
	 0,			     /* dst_mask */
	 FALSE),		     /* pcrel_offset */

  /* A 16 bit absolute relocation.  */
  HOWTO (R_IQ2000_16,		     /* type */
	 0,			     /* rightshift */
	 1,			     /* size (0 = byte, 1 = short, 2 = long) */
	 16,			     /* bitsize */
	 FALSE,			     /* pc_relative */
	 0,			     /* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	     /* special_function */
	 "R_IQ2000_16",		     /* name */
	 FALSE,			     /* partial_inplace */
	 0x0000,		     /* src_mask */
	 0xffff,		     /* dst_mask */
	 FALSE),		     /* pcrel_offset */

  /* A 32 bit absolute relocation.  */
  HOWTO (R_IQ2000_32,		     /* type */
	 0,			     /* rightshift */
	 2,			     /* size (0 = byte, 1 = short, 2 = long) */
	 31,			     /* bitsize */
	 FALSE,			     /* pc_relative */
	 0,			     /* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	     /* special_function */
	 "R_IQ2000_32",		     /* name */
	 FALSE,			     /* partial_inplace */
	 0x00000000,		     /* src_mask */
	 0x7fffffff,		     /* dst_mask */
	 FALSE),		     /* pcrel_offset */

  /* 26 bit branch address.  */
  HOWTO (R_IQ2000_26,		/* type */
	 2,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 26,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_dont, /* complain_on_overflow */
				/* This needs complex overflow
				   detection, because the upper four
				   bits must match the PC.  */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_IQ2000_26",		/* name */
	 FALSE,			/* partial_inplace */
	 0x00000000,		/* src_mask */
	 0x03ffffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* 16 bit PC relative reference.  */
  HOWTO (R_IQ2000_PC16,		/* type */
	 2,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 TRUE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_signed, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_IQ2000_PC16",	/* name */
	 FALSE,			/* partial_inplace */
	 0x0000,		/* src_mask */
	 0xffff,		/* dst_mask */
	 TRUE),			/* pcrel_offset */

  /* high 16 bits of symbol value.  */
  HOWTO (R_IQ2000_HI16,		/* type */
	 16,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 15,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_dont, /* complain_on_overflow */
	 iq2000_elf_howto_hi16_reloc,	/* special_function */
	 "R_IQ2000_HI16",	/* name */
	 FALSE,			/* partial_inplace */
	 0x0000,		/* src_mask */
	 0x7fff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* Low 16 bits of symbol value.  */
  HOWTO (R_IQ2000_LO16,		/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_dont, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_IQ2000_LO16",	/* name */
	 FALSE,			/* partial_inplace */
	 0x0000,		/* src_mask */
	 0xffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* 16-bit jump offset.  */
  HOWTO (R_IQ2000_OFFSET_16,	/* type */
	 2,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_dont, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_IQ2000_OFFSET_16",	/* name */
	 FALSE,			/* partial_inplace */
	 0x0000,		/* src_mask */
	 0xffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* 21-bit jump offset.  */
  HOWTO (R_IQ2000_OFFSET_21,	/* type */
	 2,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 21,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_dont, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_IQ2000_OFFSET_21",	/* name */
	 FALSE,			/* partial_inplace */
	 0x000000,		/* src_mask */
	 0x1fffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* unsigned high 16 bits of value.  */
  HOWTO (R_IQ2000_OFFSET_21,	/* type */
	 16,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_dont, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_IQ2000_UHI16",	/* name */
	 FALSE,			/* partial_inplace */
	 0x0000,		/* src_mask */
	 0x7fff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* A 32 bit absolute debug relocation.  */
  HOWTO (R_IQ2000_32_DEBUG,	     /* type */
	 0,			     /* rightshift */
	 2,			     /* size (0 = byte, 1 = short, 2 = long) */
	 32,			     /* bitsize */
	 FALSE,			     /* pc_relative */
	 0,			     /* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	     /* special_function */
	 "R_IQ2000_32",		     /* name */
	 FALSE,			     /* partial_inplace */
	 0x00000000,		     /* src_mask */
	 0xffffffff,		     /* dst_mask */
	 FALSE),		     /* pcrel_offset */

};

/* GNU extension to record C++ vtable hierarchy.  */
static reloc_howto_type iq2000_elf_vtinherit_howto =
  HOWTO (R_IQ2000_GNU_VTINHERIT,    /* type */
	 0,			   /* rightshift */
	 2,			   /* size (0 = byte, 1 = short, 2 = long) */
	 0,			   /* bitsize */
	 FALSE,			   /* pc_relative */
	 0,			   /* bitpos */
	 complain_overflow_dont,   /* complain_on_overflow */
	 NULL,			   /* special_function */
	 "R_IQ2000_GNU_VTINHERIT",  /* name */
	 FALSE,			   /* partial_inplace */
	 0,			   /* src_mask */
	 0,			   /* dst_mask */
	 FALSE);		   /* pcrel_offset */

/* GNU extension to record C++ vtable member usage.  */
static reloc_howto_type iq2000_elf_vtentry_howto =
  HOWTO (R_IQ2000_GNU_VTENTRY,	   /* type */
	 0,			   /* rightshift */
	 2,			   /* size (0 = byte, 1 = short, 2 = long) */
	 0,			   /* bitsize */
	 FALSE,			   /* pc_relative */
	 0,			   /* bitpos */
	 complain_overflow_dont,   /* complain_on_overflow */
	 NULL,			   /* special_function */
	 "R_IQ2000_GNU_VTENTRY",    /* name */
	 FALSE,			   /* partial_inplace */
	 0,			   /* src_mask */
	 0,			   /* dst_mask */
	 FALSE);		   /* pcrel_offset */


static bfd_reloc_status_type
iq2000_elf_howto_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED,
			     arelent *reloc_entry,
			     asymbol *symbol,
			     void * data,
			     asection *input_section,
			     bfd *output_bfd,
			     char **error_message ATTRIBUTE_UNUSED)
{
  bfd_reloc_status_type ret;
  bfd_vma relocation;

  /* If we're relocating and this an external symbol,
     we don't want to change anything.  */
  if (output_bfd != (bfd *) NULL
      && (symbol->flags & BSF_SECTION_SYM) == 0
      && reloc_entry->addend == 0)
    {
      reloc_entry->address += input_section->output_offset;
      return bfd_reloc_ok;
    }

  if (bfd_is_com_section (symbol->section))
    relocation = 0;
  else
    relocation = symbol->value;

  relocation += symbol->section->output_section->vma;
  relocation += symbol->section->output_offset;
  relocation += reloc_entry->addend;

  /* If %lo will have sign-extension, compensate by add 0x10000 to hi portion.  */
  if (relocation & 0x8000)
    reloc_entry->addend += 0x10000;

  /* Now do the reloc in the usual way.	 */
  ret = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
				input_section, output_bfd, error_message);

  /* Put it back the way it was.  */
  if (relocation & 0x8000)
    reloc_entry->addend -= 0x10000;

  return ret;
}

static bfd_reloc_status_type
iq2000_elf_relocate_hi16 (bfd *input_bfd,
			  Elf_Internal_Rela *relhi,
			  bfd_byte *contents,
			  bfd_vma value)
{
  bfd_vma insn;

  insn = bfd_get_32 (input_bfd, contents + relhi->r_offset);
  
  value += relhi->r_addend;
  value &= 0x7fffffff; /* Mask off top-bit which is Harvard mask bit.  */

  /* If top-bit of %lo value is on, this means that %lo will
     sign-propagate and so we compensate by adding 1 to %hi value.  */
  if (value & 0x8000)
    value += 0x10000;

  value >>= 16; 
  insn = ((insn & ~0xFFFF) | value);

  bfd_put_32 (input_bfd, insn, contents + relhi->r_offset);
  return bfd_reloc_ok;
}

/* Map BFD reloc types to IQ2000 ELF reloc types.  */

static reloc_howto_type *
iq2000_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
			  bfd_reloc_code_real_type code)
{
  /* Note that the iq2000_elf_howto_table is indxed by the R_
     constants.	 Thus, the order that the howto records appear in the
     table *must* match the order of the relocation types defined in
     include/elf/iq2000.h.  */

  switch (code)
    {
    case BFD_RELOC_NONE:
      return &iq2000_elf_howto_table[ (int) R_IQ2000_NONE];
    case BFD_RELOC_16:
      return &iq2000_elf_howto_table[ (int) R_IQ2000_16];
    case BFD_RELOC_32:
      return &iq2000_elf_howto_table[ (int) R_IQ2000_32];
    case BFD_RELOC_MIPS_JMP:
      return &iq2000_elf_howto_table[ (int) R_IQ2000_26];
    case BFD_RELOC_IQ2000_OFFSET_16:
      return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_16];
    case BFD_RELOC_IQ2000_OFFSET_21:
      return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_21];
    case BFD_RELOC_16_PCREL_S2:
      return &iq2000_elf_howto_table[ (int) R_IQ2000_PC16];
    case BFD_RELOC_HI16:
      return &iq2000_elf_howto_table[ (int) R_IQ2000_HI16];
    case BFD_RELOC_IQ2000_UHI16:
      return &iq2000_elf_howto_table[ (int) R_IQ2000_UHI16];
    case BFD_RELOC_LO16:
      return &iq2000_elf_howto_table[ (int) R_IQ2000_LO16];
    case BFD_RELOC_VTABLE_INHERIT:
      return &iq2000_elf_vtinherit_howto;
    case BFD_RELOC_VTABLE_ENTRY:
      return &iq2000_elf_vtentry_howto;
    default:
      /* Pacify gcc -Wall.  */
      return NULL;
    }
  return NULL;
}


/* Perform a single relocation.	 By default we use the standard BFD
   routines.  */

static bfd_reloc_status_type
iq2000_final_link_relocate (reloc_howto_type *	howto,
			    bfd *		input_bfd,
			    asection *		input_section,
			    bfd_byte *		contents,
			    Elf_Internal_Rela *	rel,
			    bfd_vma		relocation)
{
  return _bfd_final_link_relocate (howto, input_bfd, input_section,
				   contents, rel->r_offset,
				   relocation, rel->r_addend);
}

/* Set the howto pointer for a IQ2000 ELF reloc.  */

static void
iq2000_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
			   arelent * cache_ptr,
			   Elf_Internal_Rela * dst)
{
  unsigned int r_type;

  r_type = ELF32_R_TYPE (dst->r_info);
  switch (r_type)
    {
    case R_IQ2000_GNU_VTINHERIT:
      cache_ptr->howto = & iq2000_elf_vtinherit_howto;
      break;

    case R_IQ2000_GNU_VTENTRY:
      cache_ptr->howto = & iq2000_elf_vtentry_howto;
      break;

    default:
      cache_ptr->howto = & iq2000_elf_howto_table [r_type];
      break;
    }
}

/* Look through the relocs for a section during the first phase.
   Since we don't do .gots or .plts, we just need to consider the
   virtual table relocs for gc.	 */
 
static bfd_boolean
iq2000_elf_check_relocs (bfd *abfd,
			 struct bfd_link_info *info,
			 asection *sec,
			 const Elf_Internal_Rela *relocs)
{
  Elf_Internal_Shdr *symtab_hdr;
  struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
  const Elf_Internal_Rela *rel;
  const Elf_Internal_Rela *rel_end;
  bfd_boolean changed = FALSE;
  
  if (info->relocatable)
    return TRUE;
  
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
  sym_hashes = elf_sym_hashes (abfd);
  sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
  if (!elf_bad_symtab (abfd))
    sym_hashes_end -= symtab_hdr->sh_info;
  
  rel_end = relocs + sec->reloc_count;
  for (rel = relocs; rel < rel_end; rel++)
    {
      struct elf_link_hash_entry *h;
      unsigned long r_symndx;
      
      r_symndx = ELF32_R_SYM (rel->r_info);
      if (r_symndx < symtab_hdr->sh_info)
	h = NULL;
      else
	h = sym_hashes[r_symndx - symtab_hdr->sh_info];
      
      switch (ELF32_R_TYPE (rel->r_info))
	{
	  /* This relocation describes the C++ object vtable
	     hierarchy.  Reconstruct it for later use during GC.  */
	case R_IQ2000_GNU_VTINHERIT:
	  if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
	    return FALSE;
	  break;
	  
	  /* This relocation describes which C++ vtable entries
	     are actually used.  Record for later use during GC.  */
	case R_IQ2000_GNU_VTENTRY:
	  if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
	    return FALSE;
	  break;

	case R_IQ2000_32:
	  /* For debug section, change to special harvard-aware relocations.  */
	  if (memcmp (sec->name, ".debug", 6) == 0
	      || memcmp (sec->name, ".stab", 5) == 0
	      || memcmp (sec->name, ".eh_frame", 9) == 0)
	    {
	      ((Elf_Internal_Rela *) rel)->r_info
		= ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG);
	      changed = TRUE;
	    }
	  break;
	}
    }

  if (changed)
    /* Note that we've changed relocs, otherwise if !info->keep_memory
       we'll free the relocs and lose our changes.  */
    elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;

  return TRUE;
}


/* Relocate a IQ2000 ELF section.
   There is some attempt to make this function usable for many architectures,
   both USE_REL and USE_RELA ['twould be nice if such a critter existed],
   if only to serve as a learning tool.

   The RELOCATE_SECTION function is called by the new ELF backend linker
   to handle the relocations for a section.

   The relocs are always passed as Rela structures; if the section
   actually uses Rel structures, the r_addend field will always be
   zero.

   This function is responsible for adjusting the section contents as
   necessary, and (if using Rela relocs and generating a relocatable
   output file) adjusting the reloc addend as necessary.

   This function does not have to worry about setting the reloc
   address or the reloc symbol index.

   LOCAL_SYMS is a pointer to the swapped in local symbols.

   LOCAL_SECTIONS is an array giving the section in the input file
   corresponding to the st_shndx field of each local symbol.

   The global hash table entry for the global symbols can be found
   via elf_sym_hashes (input_bfd).

   When generating relocatable output, this function must handle
   STB_LOCAL/STT_SECTION symbols specially.  The output symbol is
   going to be the section symbol corresponding to the output
   section, which means that the addend must be adjusted
   accordingly.	 */

static bfd_boolean
iq2000_elf_relocate_section (bfd *		     output_bfd ATTRIBUTE_UNUSED,
			     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)
{
  Elf_Internal_Shdr *		symtab_hdr;
  struct elf_link_hash_entry ** sym_hashes;
  Elf_Internal_Rela *		rel;
  Elf_Internal_Rela *		relend;

  if (info->relocatable)
    return TRUE;

  symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
  sym_hashes = elf_sym_hashes (input_bfd);
  relend     = relocs + input_section->reloc_count;

  for (rel = relocs; rel < relend; rel ++)
    {
      reloc_howto_type *	   howto;
      unsigned long		   r_symndx;
      Elf_Internal_Sym *	   sym;
      asection *		   sec;
      struct elf_link_hash_entry * h;
      bfd_vma			   relocation;
      bfd_reloc_status_type	   r;
      const char *		   name = NULL;
      int			   r_type;
      
      r_type = ELF32_R_TYPE (rel->r_info);
      
      if (   r_type == R_IQ2000_GNU_VTINHERIT
	  || r_type == R_IQ2000_GNU_VTENTRY)
	continue;
      
      r_symndx = ELF32_R_SYM (rel->r_info);

      /* This is a final link.	*/
      howto  = iq2000_elf_howto_table + ELF32_R_TYPE (rel->r_info);
      h	     = NULL;
      sym    = NULL;
      sec    = NULL;
      
      if (r_symndx < symtab_hdr->sh_info)
	{
	  sym = local_syms + r_symndx;
	  sec = local_sections [r_symndx];
	  relocation = (sec->output_section->vma
			+ sec->output_offset
			+ sym->st_value);
	  
	  name = bfd_elf_string_from_elf_section
	    (input_bfd, symtab_hdr->sh_link, sym->st_name);
	  name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
	}
      else
	{
	  bfd_boolean unresolved_reloc;
	  bfd_boolean warned;

	  RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
				   r_symndx, symtab_hdr, sym_hashes,
				   h, sec, relocation,
				   unresolved_reloc, warned);

	  name = h->root.root.string;
	}

      switch (r_type)
	{
	case R_IQ2000_HI16:
	  r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation);
	  break;

	case R_IQ2000_PC16:
	  rel->r_addend -= 4;
	  /* Fall through.  */

	default:
	  r = iq2000_final_link_relocate (howto, input_bfd, input_section,
					 contents, rel, relocation);
	  break;
	}

      if (r != bfd_reloc_ok)
	{
	  const char * msg = (const char *) NULL;

	  switch (r)
	    {
	    case bfd_reloc_overflow:
	      r = info->callbacks->reloc_overflow
		(info, (h ? &h->root : NULL), name, howto->name,
		 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
	      break;
	      
	    case bfd_reloc_undefined:
	      r = info->callbacks->undefined_symbol
		(info, name, input_bfd, input_section, rel->r_offset, TRUE);
	      break;
	      
	    case bfd_reloc_outofrange:
	      msg = _("internal error: out of range error");
	      break;

	    case bfd_reloc_notsupported:
	      msg = _("internal error: unsupported relocation error");
	      break;

	    case bfd_reloc_dangerous:
	      msg = _("internal error: dangerous relocation");
	      break;

	    default:
	      msg = _("internal error: unknown error");
	      break;
	    }

	  if (msg)
	    r = info->callbacks->warning
	      (info, msg, name, input_bfd, input_section, rel->r_offset);

	  if (! r)
	    return FALSE;
	}
    }

  return TRUE;
}


/* Update the got entry reference counts for the section being
   removed.  */

static bfd_boolean
iq2000_elf_gc_sweep_hook (bfd *		            abfd ATTRIBUTE_UNUSED,
			  struct bfd_link_info *    info ATTRIBUTE_UNUSED,
			  asection *		    sec ATTRIBUTE_UNUSED,
			  const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)
{
  return TRUE;
}

/* Return the section that should be marked against GC for a given
   relocation.	*/

static asection *
iq2000_elf_gc_mark_hook (asection *		      sec,
			 struct bfd_link_info *	      info ATTRIBUTE_UNUSED,
			 Elf_Internal_Rela *	      rel,
			 struct elf_link_hash_entry * h,
			 Elf_Internal_Sym *	      sym)
{
  if (h == NULL)
    return bfd_section_from_elf_index (sec->owner, sym->st_shndx);

  switch (ELF32_R_TYPE (rel->r_info))
    {
    case R_IQ2000_GNU_VTINHERIT:
    case R_IQ2000_GNU_VTENTRY:
      break;
	  
    default:
      switch (h->root.type)
	{
	case bfd_link_hash_defined:
	case bfd_link_hash_defweak:
	  return h->root.u.def.section;
	      
	case bfd_link_hash_common:
	  return h->root.u.c.p->section;
	      
	default:
	  break;
	}
    }

  return NULL;
}


/* Return the MACH for an e_flags value.  */

static int
elf32_iq2000_machine (bfd *abfd)
{
  switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK)
    {
    case EF_IQ2000_CPU_IQ10:
      return bfd_mach_iq10;

    case EF_IQ2000_CPU_IQ2000:
    default:
      return bfd_mach_iq2000;
    }
}


/* Function to set the ELF flag bits.  */

static bfd_boolean
iq2000_elf_set_private_flags (bfd *abfd, flagword flags)
{
  elf_elfheader (abfd)->e_flags = flags;
  elf_flags_init (abfd) = TRUE;
  return TRUE;
}

/* Copy backend specific data from one object module to another.  */

static bfd_boolean
iq2000_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
{
  if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
      || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
    return TRUE;

  BFD_ASSERT (!elf_flags_init (obfd)
	      || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);

  elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
  elf_flags_init (obfd) = TRUE;
  return TRUE;
}

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

static bfd_boolean
iq2000_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
{
  flagword old_flags, old_partial;
  flagword new_flags, new_partial;
  bfd_boolean error = FALSE;
  char new_opt[80];
  char old_opt[80];

  new_opt[0] = old_opt[0] = '\0';
  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)
    {
      /* Warn if different cpu is used, but allow a
	 specific cpu to override the generic cpu.  */
      new_partial = (new_flags & EF_IQ2000_CPU_MASK);
      old_partial = (old_flags & EF_IQ2000_CPU_MASK);

      if (new_partial != old_partial)
	{
	  switch (new_partial)
	    {
	    case EF_IQ2000_CPU_IQ10:
	      strcat (new_opt, " -m10");
	      break;

	    default:
	    case EF_IQ2000_CPU_IQ2000:
	      strcat (new_opt, " -m2000");
	      break;
	    }

	  switch (old_partial)
	    {
	    case EF_IQ2000_CPU_IQ10:
	      strcat (old_opt, " -m10");
	      break;

	    default:
	    case EF_IQ2000_CPU_IQ2000:
	      strcat (old_opt, " -m2000");
	      break;
	    }
	}
      
      /* Print out any mismatches from above.  */
      if (new_opt[0])
	{
	  error = TRUE;
	  _bfd_error_handler
	    (_("%s: compiled with %s and linked with modules compiled with %s"),
	     bfd_get_filename (ibfd), new_opt, old_opt);
	}

      new_flags &= ~ EF_IQ2000_ALL_FLAGS;
      old_flags &= ~ EF_IQ2000_ALL_FLAGS;

      /* Warn about any other mismatches.  */
      if (new_flags != old_flags)
	{
	  error = TRUE;

	  _bfd_error_handler
	    (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
	     bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
	}
    }

  if (error)
    bfd_set_error (bfd_error_bad_value);

  return !error;
}


static bfd_boolean
iq2000_elf_print_private_bfd_data (bfd *abfd, void * ptr)
{
  FILE *file = (FILE *) ptr;
  flagword flags;

  BFD_ASSERT (abfd != NULL && ptr != NULL);

  /* Print normal ELF private data.  */
  _bfd_elf_print_private_bfd_data (abfd, ptr);

  flags = elf_elfheader (abfd)->e_flags;
  fprintf (file, _("private flags = 0x%lx:"), (long)flags);

  switch (flags & EF_IQ2000_CPU_MASK)
    {
    case EF_IQ2000_CPU_IQ10:
      fprintf (file, " -m10");
      break;
    case EF_IQ2000_CPU_IQ2000:
      fprintf (file, " -m2000");
      break;
    default:
      break;
    }

  fputc ('\n', file);
  return TRUE;
}

static
bfd_boolean
iq2000_elf_object_p (bfd *abfd)
{
  bfd_default_set_arch_mach (abfd, bfd_arch_iq2000,
			     elf32_iq2000_machine (abfd));
  return TRUE;
}


#define ELF_ARCH		bfd_arch_iq2000
#define ELF_MACHINE_CODE	EM_IQ2000
#define ELF_MAXPAGESIZE		0x1000

#define TARGET_BIG_SYM		bfd_elf32_iq2000_vec
#define TARGET_BIG_NAME		"elf32-iq2000"

#define elf_info_to_howto_rel			NULL
#define elf_info_to_howto			iq2000_info_to_howto_rela
#define elf_backend_relocate_section		iq2000_elf_relocate_section
#define elf_backend_gc_mark_hook		iq2000_elf_gc_mark_hook
#define elf_backend_gc_sweep_hook		iq2000_elf_gc_sweep_hook
#define elf_backend_check_relocs		iq2000_elf_check_relocs
#define elf_backend_object_p			iq2000_elf_object_p
#define elf_backend_rela_normal			1

#define elf_backend_can_gc_sections		1

#define bfd_elf32_bfd_reloc_type_lookup		iq2000_reloc_type_lookup
#define bfd_elf32_bfd_set_private_flags		iq2000_elf_set_private_flags
#define bfd_elf32_bfd_copy_private_bfd_data	iq2000_elf_copy_private_bfd_data
#define bfd_elf32_bfd_merge_private_bfd_data	iq2000_elf_merge_private_bfd_data
#define bfd_elf32_bfd_print_private_bfd_data	iq2000_elf_print_private_bfd_data

#include "elf32-target.h"