| Gennady Sharapov | bb57842 | 2005-11-07 00:58:50 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk) |
| 3 | * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) |
| 4 | * Licensed under the GPL |
| 5 | */ |
| 6 | |
| 7 | /* These are here rather than tt/uaccess.c because skas mode needs them in |
| 8 | * order to do SIGBUS recovery when a tmpfs mount runs out of room. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/string.h> |
| 12 | #include "os.h" |
| 13 | |
| 14 | void __do_copy(void *to, const void *from, int n) |
| 15 | { |
| 16 | memcpy(to, from, n); |
| 17 | } |
| 18 | |
| 19 | |
| 20 | int __do_copy_to_user(void *to, const void *from, int n, |
| 21 | void **fault_addr, void **fault_catcher) |
| 22 | { |
| 23 | unsigned long fault; |
| 24 | int faulted; |
| 25 | |
| 26 | fault = __do_user_copy(to, from, n, fault_addr, fault_catcher, |
| 27 | __do_copy, &faulted); |
| 28 | if(!faulted) return(0); |
| 29 | else return(n - (fault - (unsigned long) to)); |
| 30 | } |