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         931 : elf_rawdata (Elf_Scn *scn, Elf_Data *data)
      41             : {
      42         931 :   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         931 :   if (data != NULL
      54         931 :       || (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         931 :   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         826 :       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         931 :   return &scn->rawdata.d;
      75             : }
      76             : INTDEF(elf_rawdata)