33 lines
694 B
C
33 lines
694 B
C
/*
|
|
* Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk)
|
|
* Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#include <setjmp.h>
|
|
#include <string.h>
|
|
|
|
unsigned long __do_user_copy(void *to, const void *from, int n,
|
|
void **fault_addr, void **fault_catcher,
|
|
void (*op)(void *to, const void *from,
|
|
int n), int *faulted_out)
|
|
{
|
|
unsigned long *faddrp = (unsigned long *) fault_addr, ret;
|
|
|
|
sigjmp_buf jbuf;
|
|
*fault_catcher = &jbuf;
|
|
if(sigsetjmp(jbuf, 1) == 0){
|
|
(*op)(to, from, n);
|
|
ret = 0;
|
|
*faulted_out = 0;
|
|
}
|
|
else {
|
|
ret = *faddrp;
|
|
*faulted_out = 1;
|
|
}
|
|
*fault_addr = NULL;
|
|
*fault_catcher = NULL;
|
|
return ret;
|
|
}
|
|
|