| /* 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) |
