1/* x86 CET tuning.
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#ifndef _CET_CONTROL_H
20#define _CET_CONTROL_H
21
22/* For each CET feature, IBT and SHSTK, valid control values. */
23enum dl_x86_cet_control
24{
25 /* Enable CET features based on ELF property note. */
26 cet_elf_property = 0,
27 /* Always enable CET features. */
28 cet_always_on,
29 /* Always disable CET features. */
30 cet_always_off,
31 /* Enable CET features permissively. */
32 cet_permissive
33};
34
35struct dl_x86_feature_control
36{
37 enum dl_x86_cet_control ibt : 2;
38 enum dl_x86_cet_control shstk : 2;
39};
40
41#endif /* cet-control.h */
42