1 /* 2 * Based on arch/arm/include/asm/traps.h 3 * 4 * Copyright (C) 2012 ARM Ltd. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * This program 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 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program. If not, see <http://www.gnu.org/licenses/>. 17 */ 18 #ifndef __ASM_TRAP_H 19 #define __ASM_TRAP_H 20 21 #include <linux/list.h> 22 #include <asm/sections.h> 23 24 struct pt_regs; 25 26 struct undef_hook { 27 struct list_head node; 28 u32 instr_mask; 29 u32 instr_val; 30 u64 pstate_mask; 31 u64 pstate_val; 32 int (*fn)(struct pt_regs *regs, u32 instr); 33 }; 34 35 void register_undef_hook(struct undef_hook *hook); 36 void unregister_undef_hook(struct undef_hook *hook); 37 void force_signal_inject(int signal, int code, struct pt_regs *regs, 38 unsigned long address); 39 40 void arm64_notify_segfault(struct pt_regs *regs, unsigned long addr); 41 42 /* 43 * Move regs->pc to next instruction and do necessary setup before it 44 * is executed. 45 */ 46 void arm64_skip_faulting_instruction(struct pt_regs *regs, unsigned long size); 47 48 static inline int __in_irqentry_text(unsigned long ptr) 49 { 50 return ptr >= (unsigned long)&__irqentry_text_start && 51 ptr < (unsigned long)&__irqentry_text_end; 52 } 53 54 static inline int in_exception_text(unsigned long ptr) 55 { 56 int in; 57 58 in = ptr >= (unsigned long)&__exception_text_start && 59 ptr < (unsigned long)&__exception_text_end; 60 61 return in ? : __in_irqentry_text(ptr); 62 } 63 64 static inline int in_entry_text(unsigned long ptr) 65 { 66 return ptr >= (unsigned long)&__entry_text_start && 67 ptr < (unsigned long)&__entry_text_end; 68 } 69 #endif 70