1 | /* Initialize CPU feature data for Linux/x86. |
2 | This file is part of the GNU C Library. |
3 | Copyright (C) 2018-2019 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 | <http://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)) |
24 | get_cet_status (void) |
25 | { |
26 | unsigned long long cet_status[3]; |
27 | INTERNAL_SYSCALL_DECL (err); |
28 | if (INTERNAL_SYSCALL (arch_prctl, err, 2, ARCH_CET_STATUS, |
29 | cet_status) == 0) |
30 | return cet_status[0]; |
31 | return 0; |
32 | } |
33 | |
34 | # ifndef SHARED |
35 | static inline void |
36 | x86_setup_tls (void) |
37 | { |
38 | __libc_setup_tls (); |
39 | THREAD_SETMEM (THREAD_SELF, header.feature_1, GL(dl_x86_feature_1)[0]); |
40 | } |
41 | |
42 | # define ARCH_SETUP_TLS() x86_setup_tls () |
43 | # endif |
44 | #endif |
45 | |
46 | #include <sysdeps/x86/cpu-features.c> |
47 | |