Line data    Source code

       1             : /* SPARC specific symbolic name handling.
       2             :    Copyright (C) 2002, 2003, 2005, 2007, 2008 Red Hat, Inc.
       3             :    This file is part of elfutils.
       4             :    Written by Jakub Jelinek <jakub@redhat.com>, 2002.
       5             : 
       6             :    This file is free software; you can redistribute it and/or modify
       7             :    it under the terms of either
       8             : 
       9             :      * the GNU Lesser General Public License as published by the Free
      10             :        Software Foundation; either version 3 of the License, or (at
      11             :        your option) any later version
      12             : 
      13             :    or
      14             : 
      15             :      * the GNU General Public License as published by the Free
      16             :        Software Foundation; either version 2 of the License, or (at
      17             :        your option) any later version
      18             : 
      19             :    or both in parallel, as here.
      20             : 
      21             :    elfutils is distributed in the hope that it will be useful, but
      22             :    WITHOUT ANY WARRANTY; without even the implied warranty of
      23             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      24             :    General Public License for more details.
      25             : 
      26             :    You should have received copies of the GNU General Public License and
      27             :    the GNU Lesser General Public License along with this program.  If
      28             :    not, see <http://www.gnu.org/licenses/>.  */
      29             : 
      30             : #ifdef HAVE_CONFIG_H
      31             : # include <config.h>
      32             : #endif
      33             : 
      34             : #include <elf.h>
      35             : #include <stddef.h>
      36             : 
      37             : #define BACKEND         sparc_
      38             : #include "libebl_CPU.h"
      39             : 
      40             : /* Check for the simple reloc types.  */
      41             : Elf_Type
      42          24 : sparc_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type,
      43             :                          int *addsub __attribute__ ((unused)))
      44             : {
      45          24 :   switch (type)
      46             :     {
      47             :     case R_SPARC_8:
      48             :       return ELF_T_BYTE;
      49             :     case R_SPARC_16:
      50             :     case R_SPARC_UA16:
      51             :       return ELF_T_HALF;
      52             :     case R_SPARC_32:
      53             :     case R_SPARC_UA32:
      54             :       return ELF_T_WORD;
      55             :     case R_SPARC_64:
      56             :     case R_SPARC_UA64:
      57             :       return ELF_T_XWORD;
      58             :     default:
      59             :       return ELF_T_NUM;
      60             :     }
      61             : }
      62             : 
      63             : /* Check whether machine flags are valid.  */
      64             : bool
      65           2 : sparc_machine_flag_check (GElf_Word flags)
      66             : {
      67           2 :   return ((flags &~ (EF_SPARCV9_MM
      68             :                      | EF_SPARC_LEDATA
      69             :                      | EF_SPARC_32PLUS
      70             :                      | EF_SPARC_SUN_US1
      71           2 :                      | EF_SPARC_SUN_US3)) == 0);
      72             : }
      73             : 
      74             : bool
      75           2 : sparc_check_special_section (Ebl *ebl,
      76             :                              int ndx __attribute__ ((unused)),
      77             :                              const GElf_Shdr *shdr,
      78             :                              const char *sname __attribute__ ((unused)))
      79             : {
      80           2 :   if ((shdr->sh_flags & (SHF_WRITE | SHF_EXECINSTR))
      81             :       == (SHF_WRITE | SHF_EXECINSTR))
      82             :     {
      83             :       /* This is ordinarily flagged, but is valid for a PLT on SPARC.
      84             : 
      85             :          Look for the SHT_DYNAMIC section and the DT_PLTGOT tag in it.
      86             :          Its d_ptr should match the .plt section's sh_addr.  */
      87             : 
      88             :       Elf_Scn *scn = NULL;
      89          42 :       while ((scn = elf_nextscn (ebl->elf, scn)) != NULL)
      90             :         {
      91          42 :           GElf_Shdr scn_shdr;
      92          42 :           if (likely (gelf_getshdr (scn, &scn_shdr) != NULL)
      93          42 :               && scn_shdr.sh_type == SHT_DYNAMIC
      94           2 :               && scn_shdr.sh_entsize != 0)
      95             :             {
      96           2 :               Elf_Data *data = elf_getdata (scn, NULL);
      97           2 :               if (data != NULL)
      98          22 :                 for (size_t i = 0; i < data->d_size / scn_shdr.sh_entsize; ++i)
      99             :                   {
     100          22 :                     GElf_Dyn dyn;
     101          22 :                     if (unlikely (gelf_getdyn (data, i, &dyn) == NULL))
     102             :                       break;
     103          22 :                     if (dyn.d_tag == DT_PLTGOT)
     104           2 :                       return dyn.d_un.d_ptr == shdr->sh_addr;
     105             :                   }
     106           0 :               break;
     107             :             }
     108             :         }
     109             :     }
     110             : 
     111             :   return false;
     112             : }
     113             : 
     114             : const char *
     115           0 : sparc_symbol_type_name (int type,
     116             :                         char *buf __attribute__ ((unused)),
     117             :                         size_t len __attribute__ ((unused)))
     118             : {
     119           0 :   switch (type)
     120             :     {
     121             :     case STT_SPARC_REGISTER:
     122             :       return "SPARC_REGISTER";
     123             :     }
     124           0 :   return NULL;
     125             : }
     126             : 
     127             : const char *
     128           0 : sparc_dynamic_tag_name (int64_t tag,
     129             :                         char *buf __attribute__ ((unused)),
     130             :                         size_t len __attribute__ ((unused)))
     131             : {
     132           0 :   switch (tag)
     133             :     {
     134             :     case DT_SPARC_REGISTER:
     135             :       return "SPARC_REGISTER";
     136             :     }
     137           0 :   return NULL;
     138             : }
     139             : 
     140             : bool
     141          52 : sparc_dynamic_tag_check (int64_t tag)
     142             : {
     143          52 :   switch (tag)
     144             :     {
     145             :     case DT_SPARC_REGISTER:
     146             :       return true;
     147             :     }
     148          52 :   return false;
     149             : }