#ifndef _LINUX_PERSONALITY_H
  #define _LINUX_PERSONALITY_H
  
  #include <uapi/linux/personality.h>
  
  
  /*
   * Handling of different ABIs (personalities).
   */
  
  struct exec_domain;
  struct pt_regs;
  
  extern int		register_exec_domain(struct exec_domain *);
  extern int		unregister_exec_domain(struct exec_domain *);
  extern int		__set_personality(unsigned int);
  
  
  /*
   * Description of an execution domain.
   * 
   * The first two members are refernced from assembly source
   * and should stay where they are unless explicitly needed.
   */
  typedef void (*handler_t)(int, struct pt_regs *);
  
  struct exec_domain {
  	const char		*name;		/* name of the execdomain */
  	handler_t		handler;	/* handler for syscalls */
  	unsigned char		pers_low;	/* lowest personality */
  	unsigned char		pers_high;	/* highest personality */
  	unsigned long		*signal_map;	/* signal mapping */
  	unsigned long		*signal_invmap;	/* reverse signal mapping */
  	struct map_segment	*err_map;	/* error mapping */
  	struct map_segment	*socktype_map;	/* socket type mapping */
  	struct map_segment	*sockopt_map;	/* socket option mapping */
  	struct map_segment	*af_map;	/* address family mapping */
  	struct module		*module;	/* module context of the ed. */
  	struct exec_domain	*next;		/* linked list (internal) */
  };
  
  /*
   * Return the base personality without flags.
   */
  #define personality(pers)	(pers & PER_MASK)
  
  
  /*
   * Change personality of the currently running process.
   */
  #define set_personality(pers) \
  	((current->personality == (pers)) ? 0 : __set_personality(pers))
  
  #endif /* _LINUX_PERSONALITY_H */