aboutsummaryrefslogtreecommitdiffstats
path: root/arch/um/os-Linux/uaccess.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/um/os-Linux/uaccess.c')
-rw-r--r--arch/um/os-Linux/uaccess.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/um/os-Linux/uaccess.c b/arch/um/os-Linux/uaccess.c
new file mode 100644
index 000000000000..38d710158c3d
--- /dev/null
+++ b/arch/um/os-Linux/uaccess.c
@@ -0,0 +1,32 @@
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
10unsigned 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