OpenCores
URL https://opencores.org/ocsvn/or1k/or1k/trunk

Subversion Repositories or1k

[/] [or1k/] [trunk/] [gdb-5.3/] [bfd/] [elf32-sh64.c] - Blame information for rev 1765

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 1181 sfurman
/* Hitachi SH64-specific support for 32-bit ELF
2
   Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
3
 
4
   This file is part of BFD, the Binary File Descriptor library.
5
 
6
   This program is free software; you can redistribute it and/or modify
7
   it under the terms of the GNU General Public License as published by
8
   the Free Software Foundation; either version 2 of the License, or
9
   (at your option) any later version.
10
 
11
   This program is distributed in the hope that it will be useful,
12
   but WITHOUT ANY WARRANTY; without even the implied warranty of
13
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14
   GNU General Public License for more details.
15
 
16
   You should have received a copy of the GNU General Public License
17
   along with this program; if not, write to the Free Software
18
   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
19
 
20
#define SH64_ELF
21
 
22
#include "bfd.h"
23
#include "sysdep.h"
24
#include "elf-bfd.h"
25
#include "../opcodes/sh64-opc.h"
26
 
27
/* Add a suffix for datalabel indirection symbols.  It must not match any
28
   other symbols; user symbols with or without version or other
29
   decoration.  It must only be used internally and not emitted by any
30
   means.  */
31
#define DATALABEL_SUFFIX " DL"
32
 
33
/* Used to hold data for function called through bfd_map_over_sections.  */
34
struct sh64_find_section_vma_data
35
 {
36
   asection *section;
37
   bfd_vma addr;
38
 };
39
 
40
static boolean sh64_elf_copy_private_data PARAMS ((bfd *, bfd *));
41
static boolean sh64_elf_merge_private_data PARAMS ((bfd *, bfd *));
42
static boolean sh64_elf_fake_sections PARAMS ((bfd *, Elf_Internal_Shdr *,
43
                                              asection *));
44
static boolean sh64_elf_set_private_flags PARAMS ((bfd *, flagword));
45
static boolean sh64_elf_set_mach_from_flags PARAMS ((bfd *));
46
static boolean shmedia_prepare_reloc
47
  PARAMS ((struct bfd_link_info *, bfd *, asection *,
48
           bfd_byte *, const Elf_Internal_Rela *, bfd_vma *));
49
static int sh64_elf_get_symbol_type PARAMS ((Elf_Internal_Sym *, int));
50
static boolean sh64_elf_add_symbol_hook
51
  PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
52
           const char **, flagword *, asection **, bfd_vma *));
53
static boolean sh64_elf_link_output_symbol_hook
54
  PARAMS ((bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *,
55
           asection *));
56
static boolean sh64_backend_section_from_shdr
57
  PARAMS ((bfd *, Elf_Internal_Shdr *, const char *));
58
static void sh64_elf_final_write_processing PARAMS ((bfd *, boolean));
59
static boolean sh64_bfd_elf_copy_private_section_data
60
  PARAMS ((bfd *, asection *, bfd *, asection *));
61
static void sh64_find_section_for_address PARAMS ((bfd *, asection *, PTR));
62
 
63
/* Let elf32-sh.c handle the "bfd_" definitions, so we only have to
64
   intrude with an #ifndef around the function definition.  */
65
#define sh_elf_copy_private_data                sh64_elf_copy_private_data
66
#define sh_elf_merge_private_data               sh64_elf_merge_private_data
67
#define sh_elf_set_private_flags                sh64_elf_set_private_flags
68
/* Typo in elf32-sh.c (and unlinear name).  */
69
#define bfd_elf32_bfd_set_private_flags         sh64_elf_set_private_flags
70
#define sh_elf_set_mach_from_flags              sh64_elf_set_mach_from_flags
71
 
72
#define elf_backend_sign_extend_vma             1
73
#define elf_backend_fake_sections               sh64_elf_fake_sections
74
#define elf_backend_get_symbol_type             sh64_elf_get_symbol_type
75
#define elf_backend_add_symbol_hook             sh64_elf_add_symbol_hook
76
#define elf_backend_link_output_symbol_hook \
77
        sh64_elf_link_output_symbol_hook
78
#define elf_backend_final_write_processing      sh64_elf_final_write_processing
79
#define elf_backend_section_from_shdr           sh64_backend_section_from_shdr
80
 
81
/* For objcopy, we need to set up sh64_elf_section_data (asection *) from
82
   incoming section flags.  This is otherwise done in sh64elf.em when
83
   linking or tc-sh64.c when assembling.  */
84
#define bfd_elf32_bfd_copy_private_section_data \
85
        sh64_bfd_elf_copy_private_section_data
86
 
87
/* This COFF-only function (only compiled with COFF support, making
88
   ELF-only chains problematic) returns true early for SH4, so let's just
89
   define it true here.  */
90
#define _bfd_sh_align_load_span(a,b,c,d,e,f,g,h,i,j) true
91
 
92
#ifndef ELF_ARCH
93
#define TARGET_BIG_SYM          bfd_elf32_sh64_vec
94
#define TARGET_BIG_NAME         "elf32-sh64"
95
#define TARGET_LITTLE_SYM       bfd_elf32_sh64l_vec
96
#define TARGET_LITTLE_NAME      "elf32-sh64l"
97
#define ELF_ARCH                bfd_arch_sh
98
#define ELF_MACHINE_CODE        EM_SH
99
#define ELF_MAXPAGESIZE         128
100
 
101
#define elf_symbol_leading_char '_'
102
#endif /* ELF_ARCH */
103
 
104
#define GOT_BIAS (-((long)-32768))
105
#define INCLUDE_SHMEDIA
106
#include "elf32-sh.c"
107
 
108
/* Set the SHF_SH5_ISA32 flag for ISA SHmedia code sections, and pass
109
   through SHT_SH5_CR_SORTED on a sorted .cranges section.  */
110
 
111
boolean
112
sh64_elf_fake_sections (output_bfd, elf_section_hdr, asect)
113
     bfd *output_bfd ATTRIBUTE_UNUSED;
114
     Elf_Internal_Shdr *elf_section_hdr;
115
     asection *asect;
116
{
117
  if (sh64_elf_section_data (asect) != NULL)
118
    elf_section_hdr->sh_flags
119
      |= sh64_elf_section_data (asect)->contents_flags;
120
 
121
  /* If this section has the SEC_SORT_ENTRIES flag set, it is a sorted
122
     .cranges section passing through objcopy.  */
123
  if ((bfd_get_section_flags (output_bfd, asect) & SEC_SORT_ENTRIES) != 0
124
      && strcmp (bfd_get_section_name (output_bfd, asect),
125
                 SH64_CRANGES_SECTION_NAME) == 0)
126
    elf_section_hdr->sh_type = SHT_SH5_CR_SORTED;
127
 
128
  return true;
129
}
130
 
131
static boolean
132
sh64_elf_set_mach_from_flags (abfd)
133
     bfd *abfd;
134
{
135
  flagword flags = elf_elfheader (abfd)->e_flags;
136
  asection *cranges;
137
 
138
  switch (flags & EF_SH_MACH_MASK)
139
    {
140
    case EF_SH5:
141
      /* These are fit to execute on SH5.  Just one but keep the switch
142
         construct to make additions easy.  */
143
      bfd_default_set_arch_mach (abfd, bfd_arch_sh, bfd_mach_sh5);
144
      break;
145
 
146
    default:
147
      bfd_set_error (bfd_error_wrong_format);
148
      return false;
149
    }
150
 
151
  /* We also need to set SEC_DEBUGGING on an incoming .cranges section.
152
     We could have used elf_backend_section_flags if it had given us the
153
     section name; the bfd_section member in the header argument is not
154
     set at the point of the call.  FIXME: Find out whether that is by
155
     undocumented design or a bug.  */
156
  cranges = bfd_get_section_by_name (abfd, SH64_CRANGES_SECTION_NAME);
157
  if (cranges != NULL
158
      && ! bfd_set_section_flags (abfd, cranges,
159
                                  bfd_get_section_flags (abfd, cranges)
160
                                  | SEC_DEBUGGING))
161
    return false;
162
 
163
  return true;
164
}
165
 
166
static boolean
167
sh64_elf_copy_private_data (ibfd, obfd)
168
     bfd * ibfd;
169
     bfd * obfd;
170
{
171
  if (   bfd_get_flavour (ibfd) != bfd_target_elf_flavour
172
      || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
173
    return true;
174
 
175
  BFD_ASSERT (!elf_flags_init (obfd)
176
              || (elf_elfheader (obfd)->e_flags
177
                  == elf_elfheader (ibfd)->e_flags));
178
 
179
  elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
180
  return true;
181
}
182
 
183
static boolean
184
sh64_elf_merge_private_data (ibfd, obfd)
185
     bfd *ibfd;
186
     bfd *obfd;
187
{
188
  flagword old_flags, new_flags;
189
 
190
  if (! _bfd_generic_verify_endian_match (ibfd, obfd))
191
    return false;
192
 
193
  if (   bfd_get_flavour (ibfd) != bfd_target_elf_flavour
194
      || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
195
    return true;
196
 
197
  if (bfd_get_arch_size (ibfd) != bfd_get_arch_size (obfd))
198
    {
199
      const char *msg;
200
 
201
      if (bfd_get_arch_size (ibfd) == 32
202
          && bfd_get_arch_size (obfd) == 64)
203
        msg = _("%s: compiled as 32-bit object and %s is 64-bit");
204
      else if (bfd_get_arch_size (ibfd) == 64
205
               && bfd_get_arch_size (obfd) == 32)
206
        msg = _("%s: compiled as 64-bit object and %s is 32-bit");
207
      else
208
        msg = _("%s: object size does not match that of target %s");
209
 
210
      (*_bfd_error_handler) (msg, bfd_get_filename (ibfd),
211
                             bfd_get_filename (obfd));
212
      bfd_set_error (bfd_error_wrong_format);
213
      return false;
214
    }
215
 
216
  old_flags = elf_elfheader (obfd)->e_flags;
217
  new_flags = elf_elfheader (ibfd)->e_flags;
218
  if (! elf_flags_init (obfd))
219
    {
220
      /* This happens when ld starts out with a 'blank' output file.  */
221
      elf_flags_init (obfd) = true;
222
      elf_elfheader (obfd)->e_flags = old_flags = new_flags;
223
    }
224
  /* We don't allow linking in non-SH64 code.  */
225
  else if ((new_flags & EF_SH_MACH_MASK) != EF_SH5)
226
    {
227
      (*_bfd_error_handler)
228
        ("%s: uses non-SH64 instructions while previous modules use SH64 instructions",
229
         bfd_get_filename (ibfd));
230
      bfd_set_error (bfd_error_bad_value);
231
      return false;
232
    }
233
 
234
  /* I can't think of anything sane other than old_flags being EF_SH5 and
235
     that we need to preserve that.  */
236
  elf_elfheader (obfd)->e_flags = old_flags;
237
  return sh64_elf_set_mach_from_flags (obfd);
238
}
239
 
240
/* Handle a SH64-specific section when reading an object file.  This
241
   is called when elfcode.h finds a section with an unknown type.
242
 
243
   We only recognize SHT_SH5_CR_SORTED, on the .cranges section.  */
244
 
245
boolean
246
sh64_backend_section_from_shdr (abfd, hdr, name)
247
     bfd *abfd;
248
     Elf_Internal_Shdr *hdr;
249
     const char *name;
250
{
251
  flagword flags = 0;
252
 
253
  /* We do like MIPS with a bit switch for recognized types, and returning
254
     false for a recognized section type with an unexpected name.  Right
255
     now we only have one recognized type, but that might change.  */
256
  switch (hdr->sh_type)
257
    {
258
    case SHT_SH5_CR_SORTED:
259
      if (strcmp (name, SH64_CRANGES_SECTION_NAME) != 0)
260
        return false;
261
 
262
      /* We set the SEC_SORT_ENTRIES flag so it can be passed on to
263
         sh64_elf_fake_sections, keeping SHT_SH5_CR_SORTED if this object
264
         passes through objcopy.  Perhaps it is brittle; the flag can
265
         suddenly be used by other BFD parts, but it seems not really used
266
         anywhere at the moment.  */
267
      flags = SEC_DEBUGGING | SEC_SORT_ENTRIES;
268
      break;
269
 
270
    default:
271
      return false;
272
    }
273
 
274
  if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
275
    return false;
276
 
277
  if (flags
278
      && ! bfd_set_section_flags (abfd, hdr->bfd_section,
279
                                  bfd_get_section_flags (abfd,
280
                                                         hdr->bfd_section)
281
                                  | flags))
282
    return false;
283
 
284
  return true;
285
}
286
 
287
/* In contrast to sh64_backend_section_from_shdr, this is called for all
288
   sections, but only when copying sections, not when linking or
289
   assembling.  We need to set up the sh64_elf_section_data (asection *)
290
   structure for the SH64 ELF section flags to be copied correctly.  */
291
 
292
boolean
293
sh64_bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec)
294
     bfd *ibfd;
295
     asection *isec;
296
     bfd *obfd;
297
     asection *osec;
298
{
299
  struct sh64_section_data *sh64_sec_data;
300
 
301
  if (ibfd->xvec->flavour != bfd_target_elf_flavour
302
      || obfd->xvec->flavour != bfd_target_elf_flavour)
303
    return true;
304
 
305
  if (! _bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec))
306
    return false;
307
 
308
  sh64_sec_data = sh64_elf_section_data (isec);
309
  if (sh64_sec_data == NULL)
310
    {
311
      sh64_sec_data = bfd_zmalloc (sizeof (struct sh64_section_data));
312
 
313
      if (sh64_sec_data == NULL)
314
        return false;
315
 
316
      sh64_sec_data->contents_flags
317
        = (elf_section_data (isec)->this_hdr.sh_flags
318
           & (SHF_SH5_ISA32 | SHF_SH5_ISA32_MIXED));
319
 
320
      sh64_elf_section_data (osec) = sh64_sec_data;
321
    }
322
 
323
  return true;
324
}
325
 
326
/* Function to keep SH64 specific file flags.  */
327
 
328
static boolean
329
sh64_elf_set_private_flags (abfd, flags)
330
     bfd *    abfd;
331
     flagword flags;
332
{
333
  BFD_ASSERT (! elf_flags_init (abfd)
334
              || elf_elfheader (abfd)->e_flags == flags);
335
 
336
  elf_elfheader (abfd)->e_flags = flags;
337
  elf_flags_init (abfd) = true;
338
  return sh64_elf_set_mach_from_flags (abfd);
339
}
340
 
341
/* Called when writing out an object file to decide the type of a symbol.  */
342
 
343
static int
344
sh64_elf_get_symbol_type (elf_sym, type)
345
     Elf_Internal_Sym * elf_sym;
346
     int type;
347
{
348
  if (ELF_ST_TYPE (elf_sym->st_info) == STT_DATALABEL)
349
    return STT_DATALABEL;
350
 
351
  return type;
352
}
353
 
354
/* Hook called by the linker routine which adds symbols from an object
355
   file.  We must make indirect symbols for undefined symbols marked with
356
   STT_DATALABEL, so relocations passing them will pick up that attribute
357
   and neutralize STO_SH5_ISA32 found on the symbol definition.
358
 
359
   There is a problem, though: We want to fill in the hash-table entry for
360
   this symbol and signal to the caller that no further processing is
361
   needed.  But we don't have the index for this hash-table entry.  We
362
   rely here on that the current entry is the first hash-entry with NULL,
363
   which seems brittle.  Also, iterating over the hash-table to find that
364
   entry is a linear operation on the number of symbols in this input
365
   file, and this function should take constant time, so that's not good
366
   too.  Only comfort is that DataLabel references should only be found in
367
   hand-written assembly code and thus be rare.  FIXME: Talk maintainers
368
   into adding an option to elf_add_symbol_hook (preferably) for the index
369
   or the hash entry, alternatively adding the index to Elf_Internal_Sym
370
   (not so good).  */
371
 
372
static boolean
373
sh64_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
374
     bfd *abfd;
375
     struct bfd_link_info *info;
376
     const Elf_Internal_Sym *sym;
377
     const char **namep;
378
     flagword *flagsp ATTRIBUTE_UNUSED;
379
     asection **secp;
380
     bfd_vma *valp;
381
{
382
  /* We want to do this for relocatable as well as final linking.  */
383
  if (ELF_ST_TYPE (sym->st_info) == STT_DATALABEL
384
      && info->hash->creator->flavour == bfd_target_elf_flavour)
385
    {
386
      struct elf_link_hash_entry *h;
387
 
388
      /* For relocateable links, we register the DataLabel sym in its own
389
         right, and tweak the name when it's output.  Otherwise, we make
390
         an indirect symbol of it.  */
391
      flagword flags
392
        = info->relocateable || info->emitrelocations
393
        ? BSF_GLOBAL : BSF_GLOBAL | BSF_INDIRECT;
394
 
395
      char *dl_name
396
        = bfd_malloc (strlen (*namep) + sizeof (DATALABEL_SUFFIX));
397
      struct elf_link_hash_entry ** sym_hash = elf_sym_hashes (abfd);
398
 
399
      BFD_ASSERT (sym_hash != NULL);
400
 
401
      /* Allocation may fail.  */
402
      if (dl_name == NULL)
403
        return false;
404
 
405
      strcpy (dl_name, *namep);
406
      strcat (dl_name, DATALABEL_SUFFIX);
407
 
408
      h = (struct elf_link_hash_entry *)
409
        bfd_link_hash_lookup (info->hash, dl_name, false, false, false);
410
 
411
      if (h == NULL)
412
        {
413
          /* No previous datalabel symbol.  Make one.  */
414
          if (! _bfd_generic_link_add_one_symbol (info, abfd, dl_name,
415
                                                  flags, *secp, *valp,
416
                                                  *namep, false,
417
                                                  get_elf_backend_data (abfd)->collect,
418
                                                  (struct bfd_link_hash_entry **) &h))
419
            {
420
              free (dl_name);
421
              return false;
422
            }
423
 
424
          h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF;
425
          h->type = STT_DATALABEL;
426
        }
427
      else
428
        /* If a new symbol was created, it holds the allocated name.
429
           Otherwise, we don't need it anymore and should deallocate it.  */
430
        free (dl_name);
431
 
432
      if (h->type != STT_DATALABEL
433
          || ((info->relocateable || info->emitrelocations)
434
              && h->root.type != bfd_link_hash_undefined)
435
          || (! info->relocateable && !info->emitrelocations
436
              && h->root.type != bfd_link_hash_indirect))
437
        {
438
          /* Make sure we don't get confused on invalid input.  */
439
          (*_bfd_error_handler)
440
            (_("%s: encountered datalabel symbol in input"),
441
             bfd_get_filename (abfd));
442
          bfd_set_error (bfd_error_bad_value);
443
          return false;
444
        }
445
 
446
      /* Now find the hash-table slot for this entry and fill it in.  */
447
      while (*sym_hash != NULL)
448
        sym_hash++;
449
      *sym_hash = h;
450
 
451
      /* Signal to caller to skip this symbol - we've handled it.  */
452
      *namep = NULL;
453
    }
454
 
455
  return true;
456
}
457
 
458
/* This hook function is called before the linker writes out a global
459
   symbol.  For relocatable links, DataLabel symbols will be present in
460
   linker output.  We cut off the special suffix on those symbols, so the
461
   right name appears in the output.
462
 
463
   When linking and emitting relocations, there can appear global symbols
464
   that are not referenced by relocs, but rather only implicitly through
465
   DataLabel references, a relation that is not visible to the linker.
466
   Since no stripping of global symbols in done when doing such linking,
467
   we don't need to look up and make sure to emit the main symbol for each
468
   DataLabel symbol.  */
469
 
470
boolean
471
sh64_elf_link_output_symbol_hook (abfd, info, cname, sym, input_sec)
472
     bfd *abfd ATTRIBUTE_UNUSED;
473
     struct bfd_link_info *info;
474
     const char *cname;
475
     Elf_Internal_Sym *sym;
476
     asection *input_sec ATTRIBUTE_UNUSED;
477
{
478
  char *name = (char *) cname;
479
 
480
  if (info->relocateable || info->emitrelocations)
481
    {
482
      if (ELF_ST_TYPE (sym->st_info) == STT_DATALABEL)
483
        name[strlen (name) - strlen (DATALABEL_SUFFIX)] = 0;
484
    }
485
 
486
  return true;
487
}
488
 
489
/* Check a SH64-specific reloc and put the value to relocate to into
490
   RELOCATION, ready to pass to _bfd_final_link_relocate.  Return FALSE if
491
   bad value, TRUE if ok.  */
492
 
493
static boolean
494
shmedia_prepare_reloc (info, abfd, input_section,
495
                       contents, rel, relocation)
496
     struct bfd_link_info *info;
497
     bfd *abfd;
498
     asection *input_section;
499
     bfd_byte *contents;
500
     const Elf_Internal_Rela *rel;
501
     bfd_vma *relocation;
502
{
503
  bfd_vma disp, dropped;
504
 
505
  switch (ELF32_R_TYPE (rel->r_info))
506
    {
507
    case R_SH_PT_16:
508
      /* Check the lowest bit of the destination field.  If it is 1, we
509
         check the ISA type of the destination (i.e. the low bit of the
510
         "relocation" value, and emit an error if the instruction does not
511
         match).  If it is 0, we change a PTA to PTB.  There should never
512
         be a PTB that should change to a PTA; that indicates a toolchain
513
         error; a mismatch with GAS.  */
514
      {
515
        char *msg = NULL;
516
        bfd_vma insn = bfd_get_32 (abfd, contents + rel->r_offset);
517
 
518
        if (insn & (1 << 10))
519
          {
520
            /* Check matching insn and ISA (address of target).  */
521
            if ((insn & SHMEDIA_PTB_BIT) != 0
522
                && ((*relocation + rel->r_addend) & 1) != 0)
523
              msg = _("PTB mismatch: a SHmedia address (bit 0 == 1)");
524
            else if ((insn & SHMEDIA_PTB_BIT) == 0
525
                     && ((*relocation + rel->r_addend) & 1) == 0)
526
              msg = _("PTA mismatch: a SHcompact address (bit 0 == 0)");
527
 
528
            if (msg != NULL
529
                && ! ((*info->callbacks->reloc_dangerous)
530
                      (info, msg, abfd, input_section,
531
                       rel->r_offset)))
532
              return false;
533
          }
534
        else
535
          {
536
            /* We shouldn't get here with a PTB insn and a R_SH_PT_16.  It
537
               means GAS output does not match expectations; a PTA or PTB
538
               expressed as such (or a PT found at assembly to be PTB)
539
               would match the test above, and PT expansion with an
540
               unknown destination (or when relaxing) will get us here.  */
541
            if ((insn & SHMEDIA_PTB_BIT) != 0)
542
              {
543
                (*_bfd_error_handler)
544
                  (_("%s: GAS error: unexpected PTB insn with R_SH_PT_16"),
545
                   bfd_get_filename (input_section->owner));
546
                return false;
547
              }
548
 
549
            /* Change the PTA to a PTB, if destination indicates so.  */
550
            if (((*relocation + rel->r_addend) & 1) == 0)
551
              bfd_put_32 (abfd, insn | SHMEDIA_PTB_BIT,
552
                          contents + rel->r_offset);
553
          }
554
      }
555
 
556
    case R_SH_SHMEDIA_CODE:
557
    case R_SH_DIR5U:
558
    case R_SH_DIR6S:
559
    case R_SH_DIR6U:
560
    case R_SH_DIR10S:
561
    case R_SH_DIR10SW:
562
    case R_SH_DIR10SL:
563
    case R_SH_DIR10SQ:
564
    case R_SH_IMMS16:
565
    case R_SH_IMMU16:
566
    case R_SH_IMM_LOW16:
567
    case R_SH_IMM_LOW16_PCREL:
568
    case R_SH_IMM_MEDLOW16:
569
    case R_SH_IMM_MEDLOW16_PCREL:
570
    case R_SH_IMM_MEDHI16:
571
    case R_SH_IMM_MEDHI16_PCREL:
572
    case R_SH_IMM_HI16:
573
    case R_SH_IMM_HI16_PCREL:
574
    case R_SH_64:
575
    case R_SH_64_PCREL:
576
      break;
577
 
578
    default:
579
      return false;
580
    }
581
 
582
  disp = (*relocation & 0xf);
583
  dropped = 0;
584
  switch (ELF32_R_TYPE (rel->r_info))
585
    {
586
    case R_SH_DIR10SW: dropped = disp & 1; break;
587
    case R_SH_DIR10SL: dropped = disp & 3; break;
588
    case R_SH_DIR10SQ: dropped = disp & 7; break;
589
    }
590
  if (dropped != 0)
591
    {
592
      (*_bfd_error_handler)
593
        (_("%s: error: unaligned relocation type %d at %08x reloc %08x\n"),
594
         bfd_get_filename (input_section->owner), ELF32_R_TYPE (rel->r_info),
595
         (unsigned)rel->r_offset, (unsigned)relocation);
596
      return false;
597
    }
598
 
599
  return true;
600
}
601
 
602
/* Helper function to locate the section holding a certain address.  This
603
   is called via bfd_map_over_sections.  */
604
 
605
static void
606
sh64_find_section_for_address (abfd, section, data)
607
     bfd *abfd ATTRIBUTE_UNUSED;
608
     asection *section;
609
     PTR data;
610
{
611
  bfd_vma vma;
612
  bfd_size_type size;
613
  struct sh64_find_section_vma_data *fsec_datap
614
    = (struct sh64_find_section_vma_data *) data;
615
 
616
  /* Return if already found.  */
617
  if (fsec_datap->section)
618
    return;
619
 
620
  /* If this section isn't part of the addressable contents, skip it.  */
621
  if ((bfd_get_section_flags (abfd, section) & SEC_ALLOC) == 0)
622
    return;
623
 
624
  vma = bfd_get_section_vma (abfd, section);
625
  if (fsec_datap->addr < vma)
626
    return;
627
 
628
  /* FIXME: section->reloc_done isn't set properly; a generic buglet
629
     preventing us from using bfd_get_section_size_after_reloc.  */
630
  size
631
    = section->_cooked_size ? section->_cooked_size : section->_raw_size;
632
 
633
  if (fsec_datap->addr >= vma + size)
634
    return;
635
 
636
  fsec_datap->section = section;
637
}
638
 
639
/* Make sure to write out the generated entries in the .cranges section
640
   when doing partial linking, and set bit 0 on the entry address if it
641
   points to SHmedia code and write sorted .cranges entries when writing
642
   executables (final linking and objcopy).  */
643
 
644
static void
645
sh64_elf_final_write_processing (abfd, linker)
646
     bfd *   abfd;
647
     boolean linker ATTRIBUTE_UNUSED;
648
{
649
  bfd_vma ld_generated_cranges_size;
650
  asection *cranges
651
    = bfd_get_section_by_name (abfd, SH64_CRANGES_SECTION_NAME);
652
 
653
  /* If no new .cranges were added, the generic ELF linker parts will
654
     write it all out.  If not, we need to write them out when doing
655
     partial linking.  For a final link, we will sort them and write them
656
     all out further below.  */
657
  if (linker
658
      && cranges != NULL
659
      && elf_elfheader (abfd)->e_type != ET_EXEC
660
      && (ld_generated_cranges_size
661
          = sh64_elf_section_data (cranges)->cranges_growth) != 0)
662
    {
663
      bfd_vma incoming_cranges_size
664
        = ((cranges->_cooked_size != 0
665
            ? cranges->_cooked_size : cranges->_raw_size)
666
           - ld_generated_cranges_size);
667
 
668
      if (! bfd_set_section_contents (abfd, cranges,
669
                                      cranges->contents
670
                                      + incoming_cranges_size,
671
                                      cranges->output_offset
672
                                      + incoming_cranges_size,
673
                                      ld_generated_cranges_size))
674
        {
675
          bfd_set_error (bfd_error_file_truncated);
676
          (*_bfd_error_handler)
677
            (_("%s: could not write out added .cranges entries"),
678
             bfd_get_filename (abfd));
679
        }
680
    }
681
 
682
  /* Only set entry address bit 0 and sort .cranges when linking to an
683
     executable; never with objcopy or strip.  */
684
  if (linker && elf_elfheader (abfd)->e_type == ET_EXEC)
685
    {
686
      struct sh64_find_section_vma_data fsec_data;
687
      sh64_elf_crange dummy;
688
 
689
      /* For a final link, set the low bit of the entry address to
690
         reflect whether or not it is a SHmedia address.
691
         FIXME: Perhaps we shouldn't do this if the entry address was
692
         supplied numerically, but we currently lack the infrastructure to
693
         recognize that: The entry symbol, and info whether it is numeric
694
         or a symbol name is kept private in the linker.  */
695
      fsec_data.addr = elf_elfheader (abfd)->e_entry;
696
      fsec_data.section = NULL;
697
 
698
      bfd_map_over_sections (abfd, sh64_find_section_for_address,
699
                             (PTR) &fsec_data);
700
      if (fsec_data.section
701
          && (sh64_get_contents_type (fsec_data.section,
702
                                      elf_elfheader (abfd)->e_entry,
703
                                      &dummy) == CRT_SH5_ISA32))
704
        elf_elfheader (abfd)->e_entry |= 1;
705
 
706
      /* If we have a .cranges section, sort the entries.  */
707
      if (cranges != NULL)
708
        {
709
          bfd_size_type cranges_size
710
            = (cranges->_cooked_size != 0
711
               ? cranges->_cooked_size : cranges->_raw_size);
712
 
713
          /* We know we always have these in memory at this time.  */
714
          BFD_ASSERT (cranges->contents != NULL);
715
 
716
          /* The .cranges may already have been sorted in the process of
717
             finding out the ISA-type of the entry address.  If not, we do
718
             it here.  */
719
          if (elf_section_data (cranges)->this_hdr.sh_type
720
              != SHT_SH5_CR_SORTED)
721
            {
722
              qsort (cranges->contents, cranges_size / SH64_CRANGE_SIZE,
723
                     SH64_CRANGE_SIZE,
724
                     bfd_big_endian (cranges->owner)
725
                     ? _bfd_sh64_crange_qsort_cmpb
726
                     : _bfd_sh64_crange_qsort_cmpl);
727
              elf_section_data (cranges)->this_hdr.sh_type
728
                = SHT_SH5_CR_SORTED;
729
            }
730
 
731
          /* We need to write it out in whole as sorted.  */
732
          if (! bfd_set_section_contents (abfd, cranges,
733
                                          cranges->contents,
734
                                          cranges->output_offset,
735
                                          cranges_size))
736
            {
737
              bfd_set_error (bfd_error_file_truncated);
738
              (*_bfd_error_handler)
739
                (_("%s: could not write out sorted .cranges entries"),
740
                 bfd_get_filename (abfd));
741
            }
742
        }
743
    }
744
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.