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 /* 9 * Mostly copied from i386/x86_86 - eliminated the eip < PAGE_OFFSET because 10 * that's not relevant in skas mode. 11 */ 12 is_valid_bugaddr(unsigned long eip)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 } 22