| /* |
| * Copyright 2010 Tilera Corporation. All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation, version 2. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| * NON INFRINGEMENT. See the GNU General Public License for |
| * more details. |
| */ |
| |
| #include <linux/uaccess.h> |
| #include <linux/module.h> |
| |
| int __range_ok(unsigned long addr, unsigned long size) |
| { |
| unsigned long limit = current_thread_info()->addr_limit.seg; |
| return !((addr < limit && size <= limit - addr) || |
| is_arch_mappable_range(addr, size)); |
| } |
| EXPORT_SYMBOL(__range_ok); |
| |
| #ifdef CONFIG_DEBUG_COPY_FROM_USER |
| void copy_from_user_overflow(void) |
| { |
| WARN(1, "Buffer overflow detected!\n"); |
| } |
| EXPORT_SYMBOL(copy_from_user_overflow); |
| #endif |