1/* Initialize CPU feature data for Linux/x86.
2 This file is part of the GNU C Library.
3 Copyright (C) 2018-2020 Free Software Foundation, Inc.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#if CET_ENABLED
20# include <sys/prctl.h>
21# include <asm/prctl.h>
22
23static inline int __attribute__ ((always_inline))
24get_cet_status (void)
25{
26 unsigned long long cet_status[3];
27 if (INTERNAL_SYSCALL_CALL (arch_prctl, ARCH_CET_STATUS, cet_status) == 0)
28 return cet_status[0];
29 return 0;
30}
31
32# ifndef SHARED
33static inline void
34x86_setup_tls (void)
35{
36 __libc_setup_tls ();
37 THREAD_SETMEM (THREAD_SELF, header.feature_1, GL(dl_x86_feature_1));
38}
39
40# define ARCH_SETUP_TLS() x86_setup_tls ()
41# endif
42#endif
43
44#include <sysdeps/x86/cpu-features.c>
45