1 /* x86 CET tuning. 2 This file is part of the GNU C Library. 3 Copyright (C) 2018-2022 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. */ 23 enum 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 35 struct 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