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Implement poor man's (or woman's) fault handler (or handlim). 

from Stan (or Loretta)
This commit is contained in:
pooka 2010-07-12 21:00:47 +00:00
parent eb42ba5418
commit 70d05149f8
1 changed files with 12 additions and 6 deletions
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18
sys/rump/librump/rumpkern/rumpcopy.c
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@ -1,4 +1,4 @@
/* $NetBSD: rumpcopy.c,v 1.3 2010/06/10 21:40:42 pooka Exp $ */ /* $NetBSD: rumpcopy.c,v 1.4 2010/07/12 21:00:47 pooka Exp $ */
/* /*
* Copyright (c) 2009 Antti Kantee. All Rights Reserved. * Copyright (c) 2009 Antti Kantee. All Rights Reserved.
@ -26,7 +26,7 @@
*/ */
#include <sys/cdefs.h> #include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: rumpcopy.c,v 1.3 2010/06/10 21:40:42 pooka Exp $"); __KERNEL_RCSID(0, "$NetBSD: rumpcopy.c,v 1.4 2010/07/12 21:00:47 pooka Exp $");
#include <sys/param.h> #include <sys/param.h>
#include <sys/lwp.h> #include <sys/lwp.h>
@ -40,10 +40,13 @@ int
copyin(const void *uaddr, void *kaddr, size_t len) copyin(const void *uaddr, void *kaddr, size_t len)
{ {
if (curproc->p_vmspace == &vmspace0) if (curproc->p_vmspace == &vmspace0) {
if (uaddr == NULL)
return EFAULT;
memcpy(kaddr, uaddr, len); memcpy(kaddr, uaddr, len);
else } else {
rump_sysproxy_copyin(uaddr, kaddr, len); rump_sysproxy_copyin(uaddr, kaddr, len);
}
return 0; return 0;
} }
@ -51,10 +54,13 @@ int
copyout(const void *kaddr, void *uaddr, size_t len) copyout(const void *kaddr, void *uaddr, size_t len)
{ {
if (curproc->p_vmspace == &vmspace0) if (curproc->p_vmspace == &vmspace0) {
if (uaddr == NULL)
return EFAULT;
memcpy(uaddr, kaddr, len); memcpy(uaddr, kaddr, len);
else } else {
rump_sysproxy_copyout(kaddr, uaddr, len); rump_sysproxy_copyout(kaddr, uaddr, len);
}
return 0; return 0;
} }