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       1                 :            : /* Returns the file name and build ID stored in the .gnu_altdebuglink if found.
       2                 :            :    Copyright (C) 2014 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                 :            : 
      35                 :            : ssize_t
      36                 :       5652 : dwelf_dwarf_gnu_debugaltlink (Dwarf *dwarf,
      37                 :            :                               const char **name_p,
      38                 :            :                               const void **build_idp)
      39                 :            : {
      40                 :       5652 :   Elf_Data *data = dwarf->sectiondata[IDX_gnu_debugaltlink];
      41         [ +  + ]:       5652 :   if (data == NULL)
      42                 :            :     {
      43                 :            :       return 0;
      44                 :            :     }
      45                 :            : 
      46                 :        117 :   const void *ptr = memchr (data->d_buf, '\0', data->d_size);
      47         [ -  + ]:        117 :   if (ptr == NULL)
      48                 :            :     {
      49                 :          0 :       __libdw_seterrno (DWARF_E_INVALID_ELF);
      50                 :          0 :       return -1;
      51                 :            :     }
      52                 :        117 :   size_t build_id_len = data->d_size - (ptr - data->d_buf + 1);
      53         [ -  + ]:        117 :   if (build_id_len == 0 || (size_t) (ssize_t) build_id_len != build_id_len)
      54                 :            :     {
      55                 :          0 :       __libdw_seterrno (DWARF_E_INVALID_ELF);
      56                 :          0 :       return -1;
      57                 :            :     }
      58                 :        117 :   *name_p = data->d_buf;
      59                 :        117 :   *build_idp = ptr + 1;
      60                 :        117 :   return build_id_len;
      61                 :            : }
      62                 :            : INTDEF(dwelf_dwarf_gnu_debugaltlink)