#ifndef _ASMARM_TRAP_H
  #define _ASMARM_TRAP_H
  
  #include <linux/list.h>
  
  struct undef_hook {
  	struct list_head node;
  	u32 instr_mask;
  	u32 instr_val;
  	u32 cpsr_mask;
  	u32 cpsr_val;
  	int (*fn)(struct pt_regs *regs, unsigned int instr);
  };
  
  void register_undef_hook(struct undef_hook *hook);
  void unregister_undef_hook(struct undef_hook *hook);
  
  #endif