user.h

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/* MN10300 User process data
 *
 * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public Licence
 * as published by the Free Software Foundation; either version
 * 2 of the Licence, or (at your option) any later version.
 */
#ifndef _ASM_USER_H
#define _ASM_USER_H

#include <asm/page.h>
#include <linux/ptrace.h>

#ifndef __ASSEMBLY__
/*
 * When the kernel dumps core, it starts by dumping the user struct - this will
 * be used by gdb to figure out where the data and stack segments are within
 * the file, and what virtual addresses to use.
 */
struct user {
    /* We start with the registers, to mimic the way that "memory" is
     * returned from the ptrace(3,...) function.
     */
    struct pt_regs regs;        /* Where the registers are actually stored */

    /* The rest of this junk is to help gdb figure out what goes where */
    unsigned long int u_tsize;  /* Text segment size (pages). */
    unsigned long int u_dsize;  /* Data segment size (pages). */
    unsigned long int u_ssize;  /* Stack segment size (pages). */
    unsigned long start_code;   /* Starting virtual address of text. */
    unsigned long start_stack;  /* Starting virtual address of stack area.
                       This is actually the bottom of the stack,
                       the top of the stack is always found in the
                       esp register.  */
    long int signal;        /* Signal that caused the core dump. */
    int reserved;           /* No longer used */
    struct user_pt_regs *u_ar0; /* Used by gdb to help find the values for */

    /* the registers */
    unsigned long magic;        /* To uniquely identify a core file */
    char u_comm[32];        /* User command that was responsible */
};
#endif

#define NBPG PAGE_SIZE
#define UPAGES 1
#define HOST_TEXT_START_ADDR    +(u.start_code)
#define HOST_STACK_END_ADDR +(u.start_stack + u.u_ssize * NBPG)

#endif /* _ASM_USER_H */