Branch data     Line data    Source code

       1                 :            : /* Update section header.
       2                 :            :    Copyright (C) 2000, 2001, 2002, 2010 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                 :    3889356 : gelf_update_shdr (Elf_Scn *scn, GElf_Shdr *src)
      42                 :            : {
      43                 :    3889356 :   int result = 0;
      44                 :            :   Elf *elf;
      45                 :            : 
      46   [ +  -  -  + ]:    3889356 :   if (scn == NULL || src == NULL)
      47                 :          0 :     return 0;
      48                 :            : 
      49                 :    3889356 :   elf = scn->elf;
      50                 :            :   rwlock_wrlock (elf->lock);
      51                 :            : 
      52         [ +  + ]:    3889356 :   if (elf->class == ELFCLASS32)
      53                 :            :     {
      54                 :    2685594 :       Elf32_Shdr *shdr
      55         [ +  - ]:    2685594 :         = scn->shdr.e32 ?: __elf32_getshdr_wrlock (scn);
      56                 :            : 
      57         [ -  + ]:    2685594 :       if (shdr == NULL)
      58                 :            :         {
      59                 :          0 :           __libelf_seterrno (ELF_E_INVALID_OPERAND);
      60                 :          0 :           goto out;
      61                 :            :         }
      62                 :            : 
      63         [ +  - ]:    2685594 :       if (unlikely (src->sh_flags > 0xffffffffull)
      64         [ +  - ]:    2685594 :           || unlikely (src->sh_addr > 0xffffffffull)
      65         [ +  - ]:    2685594 :           || unlikely (src->sh_offset > 0xffffffffull)
      66         [ +  - ]:    2685594 :           || unlikely (src->sh_size > 0xffffffffull)
      67         [ +  - ]:    2685594 :           || unlikely (src->sh_addralign > 0xffffffffull)
      68         [ -  + ]:    2685594 :           || unlikely (src->sh_entsize > 0xffffffffull))
      69                 :            :         {
      70                 :          0 :           __libelf_seterrno (ELF_E_INVALID_DATA);
      71                 :          0 :           goto out;
      72                 :            :         }
      73                 :            : 
      74                 :            : #define COPY(name) \
      75                 :            :       shdr->name = src->name
      76                 :    2685594 :       COPY (sh_name);
      77                 :    2685594 :       COPY (sh_type);
      78                 :    2685594 :       COPY (sh_flags);
      79                 :    2685594 :       COPY (sh_addr);
      80                 :    2685594 :       COPY (sh_offset);
      81                 :    2685594 :       COPY (sh_size);
      82                 :    2685594 :       COPY (sh_link);
      83                 :    2685594 :       COPY (sh_info);
      84                 :    2685594 :       COPY (sh_addralign);
      85                 :    2685594 :       COPY (sh_entsize);
      86                 :            :     }
      87                 :            :   else
      88                 :            :     {
      89                 :    1203762 :       Elf64_Shdr *shdr
      90         [ +  - ]:    1203762 :         = scn->shdr.e64 ?: __elf64_getshdr_wrlock (scn);
      91                 :            : 
      92         [ -  + ]:    1203762 :       if (shdr == NULL)
      93                 :            :         {
      94                 :          0 :           __libelf_seterrno (ELF_E_INVALID_OPERAND);
      95                 :          0 :           goto out;
      96                 :            :         }
      97                 :            : 
      98                 :            :       /* We only have to copy the data.  */
      99                 :    1203762 :       (void) memcpy (shdr, src, sizeof (GElf_Shdr));
     100                 :            :     }
     101                 :            : 
     102                 :            :   /* Mark the section header as modified.  */
     103                 :    3889356 :   scn->shdr_flags |= ELF_F_DIRTY;
     104                 :            : 
     105                 :    3889356 :   result = 1;
     106                 :            : 
     107                 :    3889356 :  out:
     108                 :            :   rwlock_unlock (elf->lock);
     109                 :            : 
     110                 :    3889356 :   return result;
     111                 :            : }