/* * 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