57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* livepatch.h - arm-specific Kernel Live Patching Core
|
|
*
|
|
* Copyright (C) 2018 Huawei Technologies Co., Ltd.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef _ASM_ARM_LIVEPATCH_H
|
|
#define _ASM_ARM_LIVEPATCH_H
|
|
|
|
#include <linux/module.h>
|
|
|
|
struct klp_patch;
|
|
struct klp_func;
|
|
|
|
/* kernel livepatch instruction barrier */
|
|
#define klp_smp_isb() isb()
|
|
|
|
int arch_klp_patch_func(struct klp_func *func);
|
|
void arch_klp_unpatch_func(struct klp_func *func);
|
|
|
|
#ifdef CONFIG_LIVEPATCH_STOP_MACHINE_CONSISTENCY
|
|
int klp_check_calltrace(struct klp_patch *patch, int enable);
|
|
#endif
|
|
|
|
|
|
#if defined(CONFIG_LIVEPATCH_STOP_MACHINE_CONSISTENCY)
|
|
|
|
#ifdef CONFIG_ARM_MODULE_PLTS
|
|
#define LJMP_INSN_SIZE 3
|
|
#else
|
|
#define LJMP_INSN_SIZE 1
|
|
#endif /* CONFIG_ARM_MODULE_PLTS */
|
|
|
|
struct arch_klp_data {
|
|
u32 old_insns[LJMP_INSN_SIZE];
|
|
};
|
|
|
|
long arch_klp_save_old_code(struct arch_klp_data *arch_data, void *old_func);
|
|
|
|
#endif
|
|
|
|
#endif /* _ASM_ARM_LIVEPATCH_H */
|