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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [bfd/] [elf32-sh64-com.c] - Blame information for rev 24

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1 24 jeremybenn
/* SuperH SH64-specific support for 32-bit ELF
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   Copyright 2000, 2001, 2002, 2003, 2004, 2007
3
   Free Software Foundation, Inc.
4
 
5
   This file is part of BFD, the Binary File Descriptor library.
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7
   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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12
   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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17
   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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   MA 02110-1301, USA.  */
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#define SH64_ELF
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/sh.h"
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#include "elf32-sh64.h"
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#include "../opcodes/sh64-opc.h"
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static bfd_boolean sh64_address_in_cranges
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  (asection *cranges, bfd_vma, sh64_elf_crange *);
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/* Ordering functions of a crange, for the qsort and bsearch calls and for
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   different endianness.  */
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int
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_bfd_sh64_crange_qsort_cmpb (const void *p1, const void *p2)
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{
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  bfd_vma a1 = bfd_getb32 (p1);
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  bfd_vma a2 = bfd_getb32 (p2);
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  /* Preserve order if there's ambiguous contents.  */
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  if (a1 == a2)
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    return (char *) p1 - (char *) p2;
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  return a1 - a2;
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}
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int
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_bfd_sh64_crange_qsort_cmpl (const void *p1, const void *p2)
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{
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  bfd_vma a1 = (bfd_vma) bfd_getl32 (p1);
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  bfd_vma a2 = (bfd_vma) bfd_getl32 (p2);
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  /* Preserve order if there's ambiguous contents.  */
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  if (a1 == a2)
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    return (char *) p1 - (char *) p2;
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  return a1 - a2;
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}
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int
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_bfd_sh64_crange_bsearch_cmpb (const void *p1, const void *p2)
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{
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  bfd_vma a1 = *(bfd_vma *) p1;
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  bfd_vma a2 = (bfd_vma) bfd_getb32 (p2);
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  bfd_size_type size
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    = (bfd_size_type) bfd_getb32 (SH64_CRANGE_CR_SIZE_OFFSET + (char *) p2);
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  if (a1 >= a2 + size)
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    return 1;
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  if (a1 < a2)
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    return -1;
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  return 0;
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}
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int
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_bfd_sh64_crange_bsearch_cmpl (const void *p1, const void *p2)
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{
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  bfd_vma a1 = *(bfd_vma *) p1;
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  bfd_vma a2 = (bfd_vma) bfd_getl32 (p2);
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  bfd_size_type size
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    = (bfd_size_type) bfd_getl32 (SH64_CRANGE_CR_SIZE_OFFSET + (char *) p2);
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  if (a1 >= a2 + size)
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    return 1;
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  if (a1 < a2)
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    return -1;
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  return 0;
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}
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/* Check whether a specific address is specified within a .cranges
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   section.  Return FALSE if not found, and TRUE if found, and the region
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   filled into RANGEP if non-NULL.  */
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static bfd_boolean
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sh64_address_in_cranges (asection *cranges, bfd_vma addr,
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                         sh64_elf_crange *rangep)
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{
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  bfd_byte *cranges_contents;
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  bfd_byte *found_rangep;
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  bfd_size_type cranges_size = cranges->size;
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  /* If the size is not a multiple of the cranges entry size, then
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     something is badly wrong.  */
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  if ((cranges_size % SH64_CRANGE_SIZE) != 0)
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    return FALSE;
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  /* If this section has relocations, then we can't do anything sane.  */
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  if (bfd_get_section_flags (cranges->owner, cranges) & SEC_RELOC)
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    return FALSE;
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  /* Has some kind soul (or previous call) left processed, sorted contents
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     for us?  */
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  if ((bfd_get_section_flags (cranges->owner, cranges) & SEC_IN_MEMORY)
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      && elf_section_data (cranges)->this_hdr.sh_type == SHT_SH5_CR_SORTED)
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    cranges_contents = cranges->contents;
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  else
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    {
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      if (!bfd_malloc_and_get_section (cranges->owner, cranges,
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                                       &cranges_contents))
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        goto error_return;
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      /* Is it sorted?  */
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      if (elf_section_data (cranges)->this_hdr.sh_type
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          != SHT_SH5_CR_SORTED)
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        /* Nope.  Lets sort it.  */
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        qsort (cranges_contents, cranges_size / SH64_CRANGE_SIZE,
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               SH64_CRANGE_SIZE,
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               bfd_big_endian (cranges->owner)
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               ? _bfd_sh64_crange_qsort_cmpb : _bfd_sh64_crange_qsort_cmpl);
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135
      /* Let's keep it around.  */
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      cranges->contents = cranges_contents;
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      bfd_set_section_flags (cranges->owner, cranges,
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                             bfd_get_section_flags (cranges->owner, cranges)
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                             | SEC_IN_MEMORY);
140
 
141
      /* It's sorted now.  */
142
      elf_section_data (cranges)->this_hdr.sh_type = SHT_SH5_CR_SORTED;
143
    }
144
 
145
  /* Try and find a matching range.  */
146
  found_rangep
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    = bsearch (&addr, cranges_contents, cranges_size / SH64_CRANGE_SIZE,
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               SH64_CRANGE_SIZE,
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               bfd_big_endian (cranges->owner)
150
               ? _bfd_sh64_crange_bsearch_cmpb
151
               : _bfd_sh64_crange_bsearch_cmpl);
152
 
153
  /* Fill in a few return values if we found a matching range.  */
154
  if (found_rangep)
155
    {
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      enum sh64_elf_cr_type cr_type
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        = bfd_get_16 (cranges->owner,
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                      SH64_CRANGE_CR_TYPE_OFFSET + found_rangep);
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      bfd_vma cr_addr
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        = bfd_get_32 (cranges->owner,
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                      SH64_CRANGE_CR_ADDR_OFFSET
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                      + (char *) found_rangep);
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      bfd_size_type cr_size
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        = bfd_get_32 (cranges->owner,
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                      SH64_CRANGE_CR_SIZE_OFFSET
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                      + (char *) found_rangep);
167
 
168
      rangep->cr_addr = cr_addr;
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      rangep->cr_size = cr_size;
170
      rangep->cr_type = cr_type;
171
 
172
      return TRUE;
173
    }
174
 
175
  /* There is a .cranges section, but it does not have a descriptor
176
     matching this address.  */
177
  return FALSE;
178
 
179
error_return:
180
  if (cranges_contents != NULL)
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    free (cranges_contents);
182
  return FALSE;
183
}
184
 
185
/* Determine what ADDR points to in SEC, and fill in a range descriptor in
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   *RANGEP if it's non-NULL.  */
187
 
188
enum sh64_elf_cr_type
189
sh64_get_contents_type (asection *sec, bfd_vma addr, sh64_elf_crange *rangep)
190
{
191
  asection *cranges;
192
 
193
  /* Fill in the range with the boundaries of the section as a default.  */
194
  if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour
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      && elf_elfheader (sec->owner)->e_type == ET_EXEC)
196
    {
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      rangep->cr_addr = bfd_get_section_vma (sec->owner, sec);
198
      rangep->cr_size = sec->size;
199
      rangep->cr_type = CRT_NONE;
200
    }
201
  else
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    return FALSE;
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204
  /* If none of the pertinent bits are set, then it's a SHcompact (or at
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     least not SHmedia).  */
206
  if ((elf_section_data (sec)->this_hdr.sh_flags
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       & (SHF_SH5_ISA32 | SHF_SH5_ISA32_MIXED)) == 0)
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    {
209
      enum sh64_elf_cr_type cr_type
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        = ((bfd_get_section_flags (sec->owner, sec) & SEC_CODE) != 0
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           ? CRT_SH5_ISA16 : CRT_DATA);
212
      rangep->cr_type = cr_type;
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      return cr_type;
214
    }
215
 
216
  /* If only the SHF_SH5_ISA32 bit is set, then we have SHmedia.  */
217
  if ((elf_section_data (sec)->this_hdr.sh_flags
218
       & (SHF_SH5_ISA32 | SHF_SH5_ISA32_MIXED)) == SHF_SH5_ISA32)
219
    {
220
      rangep->cr_type = CRT_SH5_ISA32;
221
      return CRT_SH5_ISA32;
222
    }
223
 
224
  /* Otherwise, we have to look up the .cranges section.  */
225
  cranges = bfd_get_section_by_name (sec->owner, SH64_CRANGES_SECTION_NAME);
226
 
227
  if (cranges == NULL)
228
    /* A mixed section but there's no .cranges section.  This is probably
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       bad input; it does not comply to specs.  */
230
    return CRT_NONE;
231
 
232
  /* If this call fails, we will still have CRT_NONE in rangep->cr_type
233
     and that will be suitable to return.  */
234
  sh64_address_in_cranges (cranges, addr, rangep);
235
 
236
  return rangep->cr_type;
237
}
238
 
239
/* This is a simpler exported interface for the benefit of gdb et al.  */
240
 
241
bfd_boolean
242
sh64_address_is_shmedia (asection *sec, bfd_vma addr)
243
{
244
  sh64_elf_crange dummy;
245
  return sh64_get_contents_type (sec, addr, &dummy) == CRT_SH5_ISA32;
246
}

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