release/src-rt-6.x/linux/linux-2.6/arch/um/sys-x86_64/bug.c

   1 /*
   2  * Copyright (C) 2006 Jeff Dike (jdike@addtoit.com)
   3  * Licensed under the GPL V2
   4  */
   5
   6 #include <linux/uaccess.h>
   7
   8 /* Mostly copied from i386/x86_86 - eliminated the eip < PAGE_OFFSET because
   9  * that's not relevent in skas mode.
  10  */
  11
  12 int is_valid_bugaddr(unsigned long eip)
  13 {
  14         unsigned short ud2;
  15
  16         if (probe_kernel_address((unsigned short __user *)eip, ud2))
  17                 return 0;
  18
  19         return ud2 == 0x0b0f;
  20 }