Branch data     Line data    Source code

       1                 :            : /* Return raw section content.
       2                 :            :    Copyright (C) 1998, 1999, 2000, 2002, 2015 Red Hat, Inc.
       3                 :            :    This file is part of elfutils.
       4                 :            :    Contributed by Ulrich Drepper <drepper@redhat.com>, 1998.
       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 <stdlib.h>
      35                 :            : 
      36                 :            : #include "libelfP.h"
      37                 :            : 
      38                 :            : 
      39                 :            : Elf_Data *
      40                 :      41415 : elf_rawdata (Elf_Scn *scn, Elf_Data *data)
      41                 :            : {
      42   [ +  -  -  + ]:      41415 :   if (scn == NULL || scn->elf->kind != ELF_K_ELF)
      43                 :            :     {
      44                 :          0 :       __libelf_seterrno (ELF_E_INVALID_HANDLE);
      45                 :          0 :       return NULL;
      46                 :            :     }
      47                 :            : 
      48                 :            :   /* If `data' is not NULL this means we are not addressing the initial
      49                 :            :      data in the file.  But this also means this data is already read
      50                 :            :      (since otherwise it is not possible to have a valid `data' pointer)
      51                 :            :      and all the data structures are initialized as well.  In this case
      52                 :            :      we can simply walk the list of data records.  */
      53         [ +  - ]:      41415 :   if (data != NULL
      54   [ +  +  -  + ]:      41415 :       || (scn->data_read != 0 && (scn->flags & ELF_F_FILEDATA) == 0))
      55                 :            :     {
      56                 :            :       /* We don't allow accessing any but the data read from the file
      57                 :            :          as raw.  */
      58                 :          0 :       __libelf_seterrno (ELF_E_DATA_MISMATCH);
      59                 :          0 :       return NULL;
      60                 :            :     }
      61                 :            : 
      62                 :            :   /* If the data for this section was not yet initialized do it now.  */
      63         [ +  + ]:      41415 :   if (scn->data_read == 0)
      64                 :            :     {
      65                 :            :       /* First thing we do is to read the data from the file.  There is
      66                 :            :          always a file (or memory region) associated with this descriptor
      67                 :            :          since otherwise the `data_read' flag would be set.  */
      68         [ +  - ]:      40524 :       if (__libelf_set_rawdata (scn) != 0)
      69                 :            :         /* Something went wrong.  The error value is already set.  */
      70                 :            :         return NULL;
      71                 :            :     }
      72                 :            : 
      73                 :            :   /* Return the first data element in the list.  */
      74                 :      41415 :   return &scn->rawdata.d;
      75                 :            : }
      76                 :            : INTDEF(elf_rawdata)