1 /* Initialize CPU feature data for Linux/x86.
2    This file is part of the GNU C Library.
3    Copyright (C) 2018-2021 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 
23 static inline int __attribute__ ((always_inline))
get_cet_status(void)24 get_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
33 static inline void
x86_setup_tls(void)34 x86_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