arch/arm64/include/asm/traps.h

   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
  38 void arm64_notify_segfault(struct pt_regs *regs, unsigned long addr);
  39
  40 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
  41 static inline int __in_irqentry_text(unsigned long ptr)
  42 {
  43         return ptr >= (unsigned long)&__irqentry_text_start &&
  44                ptr < (unsigned long)&__irqentry_text_end;
  45 }
  46 #else
  47 static inline int __in_irqentry_text(unsigned long ptr)
  48 {
  49         return 0;
  50 }
  51 #endif
  52
  53 static inline int in_exception_text(unsigned long ptr)
  54 {
  55         int in;
  56
  57         in = ptr >= (unsigned long)&__exception_text_start &&
  58              ptr < (unsigned long)&__exception_text_end;
  59
  60         return in ? : __in_irqentry_text(ptr);
  61 }
  62
  63 #endif