misc/getauxval.c

   1 /* Copyright (C) 2012-2013 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <sys/auxv.h>
  19 #include <ldsodefs.h>
  20
  21
  22 unsigned long int
  23 __getauxval (unsigned long int type)
  24 {
  25   ElfW(auxv_t) *p;
  26
  27   if (type == AT_HWCAP)
  28     return GLRO(dl_hwcap);
  29   else if (type == AT_HWCAP2)
  30     return GLRO(dl_hwcap2);
  31
  32   for (p = GLRO(dl_auxv); p->a_type != AT_NULL; p++)
  33     if (p->a_type == type)
  34       return p->a_un.a_val;
  35   return 0;
  36 }
  37
  38 weak_alias (__getauxval, getauxval)