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bb578426 GS |
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> | |
1d7173ba | 9 | #include "longjmp.h" |
bb578426 GS |
10 | |
11 | unsigned long __do_user_copy(void *to, const void *from, int n, | |
12 | void **fault_addr, void **fault_catcher, | |
13 | void (*op)(void *to, const void *from, | |
14 | int n), int *faulted_out) | |
15 | { | |
16 | unsigned long *faddrp = (unsigned long *) fault_addr, ret; | |
1d7173ba | 17 | int enable; |
bb578426 | 18 | |
ad28e029 | 19 | jmp_buf jbuf; |
bb578426 | 20 | *fault_catcher = &jbuf; |
ad28e029 | 21 | if(UML_SETJMP(&jbuf, enable) == 0){ |
bb578426 GS |
22 | (*op)(to, from, n); |
23 | ret = 0; | |
24 | *faulted_out = 0; | |
25 | } | |
26 | else { | |
27 | ret = *faddrp; | |
28 | *faulted_out = 1; | |
29 | } | |
30 | *fault_addr = NULL; | |
31 | *fault_catcher = NULL; | |
32 | return ret; | |
33 | } | |
34 |