1/*
 2 * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk)
 3 * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 4 * Licensed under the GPL
 5 */
 6
 7#include <stddef.h>
 8#include "longjmp.h"
 9
10unsigned long __do_user_copy(void *to, const void *from, int n,
11			     void **fault_addr, jmp_buf **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	jmp_buf jbuf;
18	*fault_catcher = &jbuf;
19	if (UML_SETJMP(&jbuf) == 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