| /* |
| * Copyright (C) 2013 Richard Weinberger <richrd@nod.at> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/uaccess.h> |
| #include <linux/kernel.h> |
| #include <os.h> |
| |
| long probe_kernel_read(void *dst, const void *src, size_t size) |
| { |
| void *psrc = (void *)rounddown((unsigned long)src, PAGE_SIZE); |
| |
| if ((unsigned long)src < PAGE_SIZE || size <= 0) |
| return -EFAULT; |
| |
| if (os_mincore(psrc, size + src - psrc) <= 0) |
| return -EFAULT; |
| |
| return __probe_kernel_read(dst, src, size); |
| } |