use offsetof to create an offset instead of illegal unaligned pointers

ok guenther

diff --git a/lib/libkvm/kvm.c b/lib/libkvm/kvm.c
index a2f699d..5247cff 100644 (file)
--- a/lib/libkvm/kvm.c
+++ b/lib/libkvm/kvm.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: kvm.c,v 1.61 2016/05/14 14:24:54 kettenis Exp $ */
+/*     $OpenBSD: kvm.c,v 1.62 2016/07/10 23:06:48 tedu Exp $ */
 /*     $NetBSD: kvm.c,v 1.43 1996/05/05 04:31:59 gwr Exp $     */
 
 /*-
@@ -44,6 +44,7 @@
 #include <sys/exec.h>
 #include <sys/kcore.h>
 
+#include <stddef.h>
 #include <errno.h>
 #include <ctype.h>
 #include <db.h>
@@ -791,9 +792,9 @@ kvm_nlist(kvm_t *kd, struct nlist *nl)
                /*
                 * Avoid alignment issues.
                 */
-               bcopy(&((struct nlist *)rec.data)->n_type,
+               bcopy((char *)rec.data + offsetof(struct nlist, n_type),
                    &p->n_type, sizeof(p->n_type));
-               bcopy(&((struct nlist *)rec.data)->n_value,
+               bcopy((char *)rec.data + offsetof(struct nlist, n_value),
                    &p->n_value, sizeof(p->n_value));
        }
        /*