arch/mn10300/include/asm/user.h

   1 /* MN10300 User process data
   2  *
   3  * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
   4  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public Licence
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the Licence, or (at your option) any later version.
  10  */
  11 #ifndef _ASM_USER_H
  12 #define _ASM_USER_H
  13
  14 #include <asm/page.h>
  15 #include <linux/ptrace.h>
  16
  17 #ifndef __ASSEMBLY__
  18 /*
  19  * When the kernel dumps core, it starts by dumping the user struct - this will
  20  * be used by gdb to figure out where the data and stack segments are within
  21  * the file, and what virtual addresses to use.
  22  */
  23 struct user {
  24         /* We start with the registers, to mimic the way that "memory" is
  25          * returned from the ptrace(3,...) function.
  26          */
  27         struct pt_regs regs;            /* Where the registers are actually stored */
  28
  29         /* The rest of this junk is to help gdb figure out what goes where */
  30         unsigned long int u_tsize;      /* Text segment size (pages). */
  31         unsigned long int u_dsize;      /* Data segment size (pages). */
  32         unsigned long int u_ssize;      /* Stack segment size (pages). */
  33         unsigned long start_code;       /* Starting virtual address of text. */
  34         unsigned long start_stack;      /* Starting virtual address of stack area.
  35                                            This is actually the bottom of the stack,
  36                                            the top of the stack is always found in the
  37                                            esp register.  */
  38         long int signal;                /* Signal that caused the core dump. */
  39         int reserved;                   /* No longer used */
  40         struct user_pt_regs *u_ar0;     /* Used by gdb to help find the values for */
  41
  42         /* the registers */
  43         unsigned long magic;            /* To uniquely identify a core file */
  44         char u_comm[32];                /* User command that was responsible */
  45 };
  46 #endif
  47
  48 #define NBPG PAGE_SIZE
  49 #define UPAGES 1
  50 #define HOST_TEXT_START_ADDR    +(u.start_code)
  51 #define HOST_STACK_END_ADDR     +(u.start_stack + u.u_ssize * NBPG)
  52
  53 #endif /* _ASM_USER_H */