bfd/elf32-sh64-com.c

   1 /* Hitachi SH64-specific support for 32-bit ELF
   2    Copyright 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 "libbfd.h"
  25 #include "elf-bfd.h"
  26 #include "elf/sh.h"
  27 #include "../opcodes/sh64-opc.h"
  28
  29 static bfd_boolean sh64_address_in_cranges
  30   PARAMS ((asection *cranges, bfd_vma, sh64_elf_crange *));
  31
  32 /* Ordering functions of a crange, for the qsort and bsearch calls and for
  33    different endianness.  */
  34
  35 int
  36 _bfd_sh64_crange_qsort_cmpb (p1, p2)
  37      const PTR p1;
  38      const PTR p2;
  39 {
  40   bfd_vma a1 = bfd_getb32 (p1);
  41   bfd_vma a2 = bfd_getb32 (p2);
  42
  43   /* Preserve order if there's ambiguous contents.  */
  44   if (a1 == a2)
  45     return (char *) p1 - (char *) p2;
  46
  47   return a1 - a2;
  48 }
  49
  50 int
  51 _bfd_sh64_crange_qsort_cmpl (p1, p2)
  52      const PTR p1;
  53      const PTR p2;
  54 {
  55   bfd_vma a1 = (bfd_vma) bfd_getl32 (p1);
  56   bfd_vma a2 = (bfd_vma) bfd_getl32 (p2);
  57
  58   /* Preserve order if there's ambiguous contents.  */
  59   if (a1 == a2)
  60     return (char *) p1 - (char *) p2;
  61
  62   return a1 - a2;
  63 }
  64
  65 int
  66 _bfd_sh64_crange_bsearch_cmpb (p1, p2)
  67      const PTR p1;
  68      const PTR p2;
  69 {
  70   bfd_vma a1 = *(bfd_vma *) p1;
  71   bfd_vma a2 = (bfd_vma) bfd_getb32 (p2);
  72   bfd_size_type size
  73     = (bfd_size_type) bfd_getb32 (SH64_CRANGE_CR_SIZE_OFFSET + (char *) p2);
  74
  75   if (a1 >= a2 + size)
  76     return 1;
  77   if (a1 < a2)
  78     return -1;
  79   return 0;
  80 }
  81
  82 int
  83 _bfd_sh64_crange_bsearch_cmpl (p1, p2)
  84      const PTR p1;
  85      const PTR p2;
  86 {
  87   bfd_vma a1 = *(bfd_vma *) p1;
  88   bfd_vma a2 = (bfd_vma) bfd_getl32 (p2);
  89   bfd_size_type size
  90     = (bfd_size_type) bfd_getl32 (SH64_CRANGE_CR_SIZE_OFFSET + (char *) p2);
  91
  92   if (a1 >= a2 + size)
  93     return 1;
  94   if (a1 < a2)
  95     return -1;
  96   return 0;
  97 }
  98
  99 /* Check whether a specific address is specified within a .cranges
 100    section.  Return FALSE if not found, and TRUE if found, and the region
 101    filled into RANGEP if non-NULL.  */
 102
 103 static bfd_boolean
 104 sh64_address_in_cranges (cranges, addr, rangep)
 105      asection *cranges;
 106      bfd_vma addr;
 107      sh64_elf_crange *rangep;
 108 {
 109   bfd_byte *cranges_contents;
 110   bfd_byte *found_rangep;
 111   bfd_size_type cranges_size = bfd_section_size (cranges->owner, cranges);
 112
 113   /* If the size is not a multiple of the cranges entry size, then
 114      something is badly wrong.  */
 115   if ((cranges_size % SH64_CRANGE_SIZE) != 0)
 116     return FALSE;
 117
 118   /* If this section has relocations, then we can't do anything sane.  */
 119   if (bfd_get_section_flags (cranges->owner, cranges) & SEC_RELOC)
 120     return FALSE;
 121
 122   /* Has some kind soul (or previous call) left processed, sorted contents
 123      for us?  */
 124   if ((bfd_get_section_flags (cranges->owner, cranges) & SEC_IN_MEMORY)
 125       && elf_section_data (cranges)->this_hdr.sh_type == SHT_SH5_CR_SORTED)
 126     cranges_contents = cranges->contents;
 127   else
 128     {
 129       cranges_contents
 130         = bfd_malloc (cranges->_cooked_size != 0
 131                       ? cranges->_cooked_size : cranges->_raw_size);
 132       if (cranges_contents == NULL)
 133         return FALSE;
 134
 135       if (! bfd_get_section_contents (cranges->owner, cranges,
 136                                       cranges_contents, (file_ptr) 0,
 137                                       cranges_size))
 138         goto error_return;
 139
 140       /* Is it sorted?  */
 141       if (elf_section_data (cranges)->this_hdr.sh_type
 142           != SHT_SH5_CR_SORTED)
 143         /* Nope.  Lets sort it.  */
 144         qsort (cranges_contents, cranges_size / SH64_CRANGE_SIZE,
 145                SH64_CRANGE_SIZE,
 146                bfd_big_endian (cranges->owner)
 147                ? _bfd_sh64_crange_qsort_cmpb : _bfd_sh64_crange_qsort_cmpl);
 148
 149       /* Let's keep it around.  */
 150       cranges->contents = cranges_contents;
 151       bfd_set_section_flags (cranges->owner, cranges,
 152                              bfd_get_section_flags (cranges->owner, cranges)
 153                              | SEC_IN_MEMORY);
 154
 155       /* It's sorted now.  */
 156       elf_section_data (cranges)->this_hdr.sh_type = SHT_SH5_CR_SORTED;
 157     }
 158
 159   /* Try and find a matching range.  */
 160   found_rangep
 161     = bsearch (&addr, cranges_contents, cranges_size / SH64_CRANGE_SIZE,
 162                SH64_CRANGE_SIZE,
 163                bfd_big_endian (cranges->owner)
 164                ? _bfd_sh64_crange_bsearch_cmpb
 165                : _bfd_sh64_crange_bsearch_cmpl);
 166
 167   /* Fill in a few return values if we found a matching range.  */
 168   if (found_rangep)
 169     {
 170       enum sh64_elf_cr_type cr_type
 171         = bfd_get_16 (cranges->owner,
 172                       SH64_CRANGE_CR_TYPE_OFFSET + found_rangep);
 173       bfd_vma cr_addr
 174         = bfd_get_32 (cranges->owner,
 175                       SH64_CRANGE_CR_ADDR_OFFSET
 176                       + (char *) found_rangep);
 177       bfd_size_type cr_size
 178         = bfd_get_32 (cranges->owner,
 179                       SH64_CRANGE_CR_SIZE_OFFSET
 180                       + (char *) found_rangep);
 181
 182       rangep->cr_addr = cr_addr;
 183       rangep->cr_size = cr_size;
 184       rangep->cr_type = cr_type;
 185
 186       return TRUE;
 187     }
 188
 189   /* There is a .cranges section, but it does not have a descriptor
 190      matching this address.  */
 191   return FALSE;
 192
 193 error_return:
 194   free (cranges_contents);
 195   return FALSE;
 196 }
 197
 198 /* Determine what ADDR points to in SEC, and fill in a range descriptor in
 199    *RANGEP if it's non-NULL.  */
 200
 201 enum sh64_elf_cr_type
 202 sh64_get_contents_type (sec, addr, rangep)
 203      asection *sec;
 204      bfd_vma addr;
 205      sh64_elf_crange *rangep;
 206 {
 207   asection *cranges;
 208
 209   /* Fill in the range with the boundaries of the section as a default.  */
 210   if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour
 211       && elf_elfheader (sec->owner)->e_type == ET_EXEC)
 212     {
 213       rangep->cr_addr = bfd_get_section_vma (sec->owner, sec);
 214       rangep->cr_size = bfd_section_size (sec->owner, sec);
 215       rangep->cr_type = CRT_NONE;
 216     }
 217   else
 218     return FALSE;
 219
 220   /* If none of the pertinent bits are set, then it's a SHcompact (or at
 221      least not SHmedia).  */
 222   if ((elf_section_data (sec)->this_hdr.sh_flags
 223        & (SHF_SH5_ISA32 | SHF_SH5_ISA32_MIXED)) == 0)
 224     {
 225       enum sh64_elf_cr_type cr_type
 226         = ((bfd_get_section_flags (sec->owner, sec) & SEC_CODE) != 0
 227            ? CRT_SH5_ISA16 : CRT_DATA);
 228       rangep->cr_type = cr_type;
 229       return cr_type;
 230     }
 231
 232   /* If only the SHF_SH5_ISA32 bit is set, then we have SHmedia.  */
 233   if ((elf_section_data (sec)->this_hdr.sh_flags
 234        & (SHF_SH5_ISA32 | SHF_SH5_ISA32_MIXED)) == SHF_SH5_ISA32)
 235     {
 236       rangep->cr_type = CRT_SH5_ISA32;
 237       return CRT_SH5_ISA32;
 238     }
 239
 240   /* Otherwise, we have to look up the .cranges section.  */
 241   cranges = bfd_get_section_by_name (sec->owner, SH64_CRANGES_SECTION_NAME);
 242
 243   if (cranges == NULL)
 244     /* A mixed section but there's no .cranges section.  This is probably
 245        bad input; it does not comply to specs.  */
 246     return CRT_NONE;
 247
 248   /* If this call fails, we will still have CRT_NONE in rangep->cr_type
 249      and that will be suitable to return.  */
 250   sh64_address_in_cranges (cranges, addr, rangep);
 251
 252   return rangep->cr_type;
 253 }
 254
 255 /* This is a simpler exported interface for the benefit of gdb et al.  */
 256
 257 bfd_boolean
 258 sh64_address_is_shmedia (sec, addr)
 259      asection *sec;
 260      bfd_vma addr;
 261 {
 262   sh64_elf_crange dummy;
 263   return sh64_get_contents_type (sec, addr, &dummy) == CRT_SH5_ISA32;
 264 }