linux/arch/um/os-Linux/uaccess.c
Jeff Dike a5df0d1a2c [PATCH] uml: tidy longjmp macro
The UML_SETJMP macro was requiring its users to pass in a argument which it
could supply itself, since it wasn't used outside that invocation of the
macro.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-14 21:53:52 -07:00

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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>
#include "longjmp.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;
jmp_buf jbuf;
*fault_catcher = &jbuf;
if(UML_SETJMP(&jbuf) == 0){
(*op)(to, from, n);
ret = 0;
*faulted_out = 0;
}
else {
ret = *faddrp;
*faulted_out = 1;
}
*fault_addr = NULL;
*fault_catcher = NULL;
return ret;
}