57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0
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*
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* Copyright (C) 2014-2019, Huawei.
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* Author: Li Bin <huawei.libin@huawei.com>
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* Author: Cheng Jian <cj.chengjian@huawei.com>
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* Copyright (C) 2023 Huawei.
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* Author: Zheng Yejian <zhengyejian1@huawei.com>
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*
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* livepatch.h - arm64-specific Kernel Live Patching Core
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _ASM_ARM64_LIVEPATCH_H
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#define _ASM_ARM64_LIVEPATCH_H
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#ifdef CONFIG_LIVEPATCH_WO_FTRACE
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#define LJMP_INSN_SIZE 4
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struct arch_klp_data {
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u32 old_insns[LJMP_INSN_SIZE];
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/*
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* Saved opcode at the entry of the old func (which maybe replaced
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* with breakpoint).
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*/
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u32 saved_opcode;
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};
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#define KLP_MAX_REPLACE_SIZE sizeof_field(struct arch_klp_data, old_insns)
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struct klp_func;
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#define klp_smp_isb() isb()
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int arch_klp_patch_func(struct klp_func *func);
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void arch_klp_unpatch_func(struct klp_func *func);
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long arch_klp_save_old_code(struct arch_klp_data *arch_data, void *old_func);
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bool arch_check_jump_insn(unsigned long func_addr);
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int arch_klp_check_calltrace(bool (*check_func)(void *, int *, unsigned long), void *data);
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int arch_klp_add_breakpoint(struct arch_klp_data *arch_data, void *old_func);
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void arch_klp_remove_breakpoint(struct arch_klp_data *arch_data, void *old_func);
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int arch_klp_module_check_calltrace(void *data);
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#endif /* CONFIG_LIVEPATCH_WO_FTRACE */
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#endif /* _ASM_ARM64_LIVEPATCH_H */
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