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user.h

#ifndef __ASM_CRIS_USER_H
#define __ASM_CRIS_USER_H

#include <linux/types.h>
#include <asm/ptrace.h>
#include <asm/page.h>
#include <arch/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).  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 user_regs_struct 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 */
      unsigned long     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 /* __ASM_CRIS_USER_H */

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