| 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 | #include <setjmp.h> |
| 8 | #include <string.h> |
| 9 | |
| 10 | unsigned long __do_user_copy(void *to, const void *from, int n, |
| 11 | void **fault_addr, void **fault_catcher, |
| 12 | void (*op)(void *to, const void *from, |
| 13 | int n), int *faulted_out) |
| 14 | { |
| 15 | unsigned long *faddrp = (unsigned long *) fault_addr, ret; |
| 16 | |
| 17 | sigjmp_buf jbuf; |
| 18 | *fault_catcher = &jbuf; |
| 19 | if(sigsetjmp(jbuf, 1) == 0){ |
| 20 | (*op)(to, from, n); |
| 21 | ret = 0; |
| 22 | *faulted_out = 0; |
| 23 | } |
| 24 | else { |
| 25 | ret = *faddrp; |
| 26 | *faulted_out = 1; |
| 27 | } |
| 28 | *fault_addr = NULL; |
| 29 | *fault_catcher = NULL; |
| 30 | return ret; |
| 31 | } |
| 32 | |