1 /* 2 * livepatch.h - x86-specific Kernel Live Patching Core 3 * 4 * Copyright (C) 2014 Seth Jennings <sjenning@redhat.com> 5 * Copyright (C) 2014 SUSE 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 2 10 * of the License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, see <http://www.gnu.org/licenses/>. 19 */ 20 21 #ifndef _ASM_X86_LIVEPATCH_H 22 #define _ASM_X86_LIVEPATCH_H 23 24 #include <asm/setup.h> 25 #include <linux/module.h> 26 #include <linux/ftrace.h> 27 28 #ifdef CONFIG_LIVEPATCH klp_check_compiler_support(void)29static inline int klp_check_compiler_support(void) 30 { 31 #ifndef CC_USING_FENTRY 32 return 1; 33 #endif 34 return 0; 35 } 36 int klp_write_module_reloc(struct module *mod, unsigned long type, 37 unsigned long loc, unsigned long value); 38 klp_arch_set_pc(struct pt_regs * regs,unsigned long ip)39static inline void klp_arch_set_pc(struct pt_regs *regs, unsigned long ip) 40 { 41 regs->ip = ip; 42 } 43 #else 44 #error Live patching support is disabled; check CONFIG_LIVEPATCH 45 #endif 46 47 #endif /* _ASM_X86_LIVEPATCH_H */ 48