arch/um/sys-i386/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 #include <asm/errno.h>
   8
   9 /* Mostly copied from i386/x86_86 - eliminated the eip < PAGE_OFFSET because
  10  * that's not relevant in skas mode.
  11  */
  12
  13 int is_valid_bugaddr(unsigned long eip)
  14 {
  15         unsigned short ud2;
  16
  17         if (probe_kernel_address((unsigned short __user *)eip, ud2))
  18                 return 0;
  19
  20         return ud2 == 0x0b0f;
  21 }