#ifndef _ASM_POWERPC_USER_H
  #define _ASM_POWERPC_USER_H

  #ifdef __KERNEL__

  #include <asm/ptrace.h>

  #include <asm/page.h>
  
  /*

   * Adapted from <asm-alpha/user.h>
   *

   * Core file format: The core file is written in such a way that gdb
   * can understand it and provide useful information to the user (under
   * linux we use the `trad-core' bfd, NOT the osf-core).  The file contents
   * are as follows:
   *
   *  upage: 1 page consisting of a user struct that tells gdb
   *	what is present in the file.  Directly after this is a
   *	copy of the task_struct, which is currently not used by gdb,
   *	but it may come in handy at some point.  All of the registers
   *	are stored as part of the upage.  The upage should always be
   *	only one page long.
   *  data: The data segment follows next.  We use current->end_text to
   *	current->brk to pick up all of the user variables, plus any memory
   *	that may have been sbrk'ed.  No attempt is made to determine if a
   *	page is demand-zero or if a page is totally unused, we just cover
   *	the entire range.  All of the addresses are rounded in such a way
   *	that an integral number of pages is written.
   *  stack: We need the stack information in order to get a meaningful
   *	backtrace.  We need to write the data from usp to
   *	current->start_stack, so we round each of these in order to be able
   *	to write an integer number of pages.
   */
  struct user {
  	struct pt_regs	regs;			/* entire machine state */
  	size_t		u_tsize;		/* text size (pages) */
  	size_t		u_dsize;		/* data size (pages) */
  	size_t		u_ssize;		/* stack size (pages) */
  	unsigned long	start_code;		/* text starting address */
  	unsigned long	start_data;		/* data starting address */
  	unsigned long	start_stack;		/* stack starting address */
  	long int	signal;			/* signal causing core dump */
  	struct regs *	u_ar0;			/* help gdb find registers */
  	unsigned long	magic;			/* identifies a core file */
  	char		u_comm[32];		/* user command name */
  };
  
  #define NBPG			PAGE_SIZE
  #define UPAGES			1
  #define HOST_TEXT_START_ADDR	(u.start_code)
  #define HOST_DATA_START_ADDR	(u.start_data)
  #define HOST_STACK_END_ADDR	(u.start_stack + u.u_ssize * NBPG)

  #endif	/* __KERNEL__ */
  #endif	/* _ASM_POWERPC_USER_H */