/* Copyright (C) 2015-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <sys/personality.h>

#include <sysdep.h>

extern __typeof (personality) __personality;

int

__personality (unsigned long persona)

{

#ifdef PERSONALITY_TRUNCATE_ARGUMENT

  /* Starting with kernel commit v2.6.21-3117-g97dc32c, the type of

     task_struct->pesonality is "unsigned int".

     Starting with kernel commit v2.6.35-rc1-372-g485d527, the personality

     syscall accepts "unsigned int" instead of "long unsigned int".

     Inbetween, a personality argument that does not fit into "unsigned int"

     would result to system call returning -EINVAL.

     We explicitly truncate the personality argument to "unsigned int"

     to eliminate the uncertainty.  */

  persona = (unsigned int) persona;

#endif

  INTERNAL_SYSCALL_DECL (err);

  long ret = INTERNAL_SYSCALL (personality, err, 1, persona);

  /* Starting with kernel commit v2.6.29-6609-g11d06b2, the personality syscall

     never fails.  However, 32-bit kernels might flag valid values as errors, so

     we need to reverse the error setting.  We can't use the raw result as some

     arches split the return/error values.  */

  if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (ret, err)))

    ret = -INTERNAL_SYSCALL_ERRNO (ret, err);

  return ret;

}

weak_alias (__personality, personality)