Branch data     Line data    Source code

       1                 :             : /* Update information in dynamic table at the given index.
       2                 :             :    Copyright (C) 2000, 2001, 2002, 2005, 2009, 2014, 2015 Red Hat, Inc.
       3                 :             :    This file is part of elfutils.
       4                 :             :    Written by Ulrich Drepper <drepper@redhat.com>, 2000.
       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 <gelf.h>
      35                 :             : #include <string.h>
      36                 :             : 
      37                 :             : #include "libelfP.h"
      38                 :             : 
      39                 :             : 
      40                 :             : int
      41                 :           0 : gelf_update_dyn (Elf_Data *data, int ndx, GElf_Dyn *src)
      42                 :             : {
      43                 :           0 :   Elf_Data_Scn *data_scn = (Elf_Data_Scn *) data;
      44                 :           0 :   Elf_Scn *scn;
      45                 :           0 :   int result = 0;
      46                 :             : 
      47         [ #  # ]:           0 :   if (data == NULL)
      48                 :             :     return 0;
      49                 :             : 
      50         [ #  # ]:           0 :   if (unlikely (data_scn->d.d_type != ELF_T_DYN))
      51                 :             :     {
      52                 :             :       /* The type of the data better should match.  */
      53                 :           0 :       __libelf_seterrno (ELF_E_DATA_MISMATCH);
      54                 :           0 :       return 0;
      55                 :             :     }
      56                 :             : 
      57                 :           0 :   scn = data_scn->s;
      58                 :           0 :   rwlock_wrlock (scn->elf->lock);
      59                 :             : 
      60         [ #  # ]:           0 :   if (scn->elf->class == ELFCLASS32)
      61                 :             :     {
      62                 :           0 :       Elf32_Dyn *dyn;
      63                 :             : 
      64                 :             :       /* There is the possibility that the values in the input are
      65                 :             :          too large.  */
      66         [ #  # ]:           0 :       if (unlikely (src->d_tag < -0x80000000ll)
      67         [ #  # ]:           0 :           || unlikely (src->d_tag > 0x7fffffffll)
      68         [ #  # ]:           0 :           || unlikely (src->d_un.d_val > 0xffffffffull))
      69                 :             :         {
      70                 :           0 :           __libelf_seterrno (ELF_E_INVALID_DATA);
      71                 :           0 :           goto out;
      72                 :             :         }
      73                 :             : 
      74                 :             :       /* Check whether we have to resize the data buffer.  */
      75         [ #  # ]:           0 :       if (INVALID_NDX (ndx, Elf32_Dyn, &data_scn->d))
      76                 :             :         {
      77                 :           0 :           __libelf_seterrno (ELF_E_INVALID_INDEX);
      78                 :           0 :           goto out;
      79                 :             :         }
      80                 :             : 
      81                 :           0 :       dyn = &((Elf32_Dyn *) data_scn->d.d_buf)[ndx];
      82                 :             : 
      83                 :           0 :       dyn->d_tag = src->d_tag;
      84                 :           0 :       dyn->d_un.d_val = src->d_un.d_val;
      85                 :             :     }
      86                 :             :   else
      87                 :             :     {
      88                 :             :       /* Check whether we have to resize the data buffer.  */
      89         [ #  # ]:           0 :       if (INVALID_NDX (ndx, Elf64_Dyn, &data_scn->d))
      90                 :             :         {
      91                 :           0 :           __libelf_seterrno (ELF_E_INVALID_INDEX);
      92                 :           0 :           goto out;
      93                 :             :         }
      94                 :             : 
      95                 :           0 :       ((Elf64_Dyn *) data_scn->d.d_buf)[ndx] = *src;
      96                 :             :     }
      97                 :             : 
      98                 :           0 :   result = 1;
      99                 :             : 
     100                 :             :   /* Mark the section as modified.  */
     101                 :           0 :   scn->flags |= ELF_F_DIRTY;
     102                 :             : 
     103                 :           0 :  out:
     104                 :           0 :   rwlock_unlock (scn->elf->lock);
     105                 :             : 
     106                 :           0 :   return result;
     107                 :             : }