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
  23 struct pt_regs;
  24
  25 struct undef_hook {
  26         struct list_head node;
  27         u32 instr_mask;
  28         u32 instr_val;
  29         u64 pstate_mask;
  30         u64 pstate_val;
  31         int (*fn)(struct pt_regs *regs, u32 instr);
  32 };
  33
  34 void register_undef_hook(struct undef_hook *hook);
  35 void unregister_undef_hook(struct undef_hook *hook);
  36
  37 void arm64_notify_segfault(struct pt_regs *regs, unsigned long addr);
  38
  39 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
  40 static inline int __in_irqentry_text(unsigned long ptr)
  41 {
  42         extern char __irqentry_text_start[];
  43         extern char __irqentry_text_end[];
  44
  45         return ptr >= (unsigned long)&__irqentry_text_start &&
  46                ptr < (unsigned long)&__irqentry_text_end;
  47 }
  48 #else
  49 static inline int __in_irqentry_text(unsigned long ptr)
  50 {
  51         return 0;
  52 }
  53 #endif
  54
  55 static inline int in_exception_text(unsigned long ptr)
  56 {
  57         extern char __exception_text_start[];
  58         extern char __exception_text_end[];
  59         int in;
  60
  61         in = ptr >= (unsigned long)&__exception_text_start &&
  62              ptr < (unsigned long)&__exception_text_end;
  63
  64         return in ? : __in_irqentry_text(ptr);
  65 }
  66
  67 #endif