47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* livepatch.h - x86-specific Kernel Live Patching Core
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*
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* Copyright (C) 2014 Seth Jennings <sjenning@redhat.com>
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* Copyright (C) 2014 SUSE
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*/
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#ifndef _ASM_X86_LIVEPATCH_H
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#define _ASM_X86_LIVEPATCH_H
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#include <asm/setup.h>
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#include <linux/ftrace.h>
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struct klp_patch;
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struct klp_func;
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#ifdef CONFIG_LIVEPATCH_FTRACE
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static inline void klp_arch_set_pc(struct pt_regs *regs, unsigned long ip)
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{
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regs->ip = ip;
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}
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#else /* CONFIG_LIVEPATCH_WO_FTRACE */
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#define klp_smp_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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#endif
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#ifdef CONFIG_LIVEPATCH_STOP_MACHINE_CONSISTENCY
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int klp_check_calltrace(struct klp_patch *patch, int enable);
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#endif
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#if defined(CONFIG_LIVEPATCH_STOP_MACHINE_CONSISTENCY) || \
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defined(CONFIG_LIVEPATCH_WO_FTRACE)
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#define JMP_E9_INSN_SIZE 5
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struct arch_klp_data {
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unsigned char old_code[JMP_E9_INSN_SIZE];
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};
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long arch_klp_save_old_code(struct arch_klp_data *arch_data, void *old_func);
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#endif
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#endif /* _ASM_X86_LIVEPATCH_H */
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