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       1                 :             : /* Creates an ELF handle from a possibly compressed file descriptor.
       2                 :             :    Copyright (C) 2018 Red Hat, Inc.
       3                 :             :    This file is part of elfutils.
       4                 :             : 
       5                 :             :    This file is free software; you can redistribute it and/or modify
       6                 :             :    it under the terms of either
       7                 :             : 
       8                 :             :      * the GNU Lesser General Public License as published by the Free
       9                 :             :        Software Foundation; either version 3 of the License, or (at
      10                 :             :        your option) any later version
      11                 :             : 
      12                 :             :    or
      13                 :             : 
      14                 :             :      * the GNU General Public License as published by the Free
      15                 :             :        Software Foundation; either version 2 of the License, or (at
      16                 :             :        your option) any later version
      17                 :             : 
      18                 :             :    or both in parallel, as here.
      19                 :             : 
      20                 :             :    elfutils is distributed in the hope that it will be useful, but
      21                 :             :    WITHOUT ANY WARRANTY; without even the implied warranty of
      22                 :             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      23                 :             :    General Public License for more details.
      24                 :             : 
      25                 :             :    You should have received copies of the GNU General Public License and
      26                 :             :    the GNU Lesser General Public License along with this program.  If
      27                 :             :    not, see <http://www.gnu.org/licenses/>.  */
      28                 :             : 
      29                 :             : #ifdef HAVE_CONFIG_H
      30                 :             : # include <config.h>
      31                 :             : #endif
      32                 :             : 
      33                 :             : #include "libdwelfP.h"
      34                 :             : #include "libdwflP.h"
      35                 :             : #include "libelfP.h"
      36                 :             : 
      37                 :             : NEW_VERSION (dwelf_elf_begin, ELFUTILS_0.177)
      38                 :             : Elf *
      39                 :         208 : dwelf_elf_begin (int fd)
      40                 :             : {
      41                 :         208 :   Elf *elf = NULL;
      42                 :         208 :   Dwfl_Error e = __libdw_open_elf (fd, &elf);
      43         [ +  - ]:         208 :   if (e == DWFL_E_NOERROR)
      44                 :         208 :     return elf;
      45                 :             : 
      46                 :             :   /* Elf wasn't usable.  Make sure there is a proper elf error
      47                 :             :      message.  This is probably not the real error, because there is
      48                 :             :      no good way to propagate errnos or decompression errors, but
      49                 :             :      better than nothing.  */
      50                 :             : 
      51         [ #  # ]:           0 :   if (e != DWFL_E_LIBELF)
      52                 :             :     {
      53                 :             :       /* Force a bad ELF error.  */
      54                 :           0 :       char badelf[EI_NIDENT] = { };
      55                 :           0 :       Elf *belf = elf_memory (badelf, EI_NIDENT);
      56                 :           0 :       elf32_getehdr (belf);
      57                 :           0 :       elf_end (belf);
      58                 :             :     }
      59                 :             : 
      60                 :             :   return NULL;
      61                 :             : }
      62                 :             : OLD_VERSION (dwelf_elf_begin, ELFUTILS_0.175)