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       1                 :            : /* Retrieve file identification data.
       2                 :            :    Copyright (C) 1998, 1999, 2000, 2002, 2004, 2015 Red Hat, Inc.
       3                 :            :    This file is part of elfutils.
       4                 :            :    Written 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 <stddef.h>
      35                 :            : 
      36                 :            : #include "libelfP.h"
      37                 :            : 
      38                 :            : 
      39                 :            : char *
      40                 :     368234 : elf_getident (Elf *elf, size_t *ptr)
      41                 :            : {
      42                 :            :   /* In case this is no ELF file, the handle is invalid and we return
      43                 :            :      NULL.  */
      44   [ +  -  -  + ]:     368234 :   if (elf == NULL || elf->kind != ELF_K_ELF)
      45                 :            :     {
      46         [ #  # ]:          0 :       if (ptr != NULL)
      47                 :          0 :         *ptr = 0;
      48                 :          0 :       return NULL;
      49                 :            :     }
      50                 :            : 
      51                 :            :   /* We already read the ELF header.  Return a pointer to it and store
      52                 :            :      the length in *PTR.  */
      53         [ +  + ]:     368234 :   if (ptr != NULL)
      54                 :         54 :     *ptr = EI_NIDENT;
      55                 :            : 
      56                 :     368234 :   return (char *) (elf->class == ELFCLASS32
      57                 :            :                    || (offsetof (struct Elf, state.elf32.ehdr)
      58                 :            :                        == offsetof (struct Elf, state.elf64.ehdr))
      59                 :     368234 :                    ? elf->state.elf32.ehdr->e_ident
      60                 :            :                    : elf->state.elf64.ehdr->e_ident);
      61                 :            : }