--- /dev/null
+++ Libc/Libc-763.12/string/FreeBSD/swab.c.patch
@@ -0,0 +1,11 @@
+--- swab.c.bsdnew	2009-11-18 18:24:38.000000000 -0800
++++ swab.c	2009-11-18 18:40:17.000000000 -0800
+@@ -45,6 +45,8 @@ swab(const void * __restrict from, void 
+ 	int n;
+ 	char *fp, *tp;
+ 
++	if (len <= 0)
++		return;
+ 	n = len >> 1;
+ 	fp = (char *)from;
+ 	tp = (char *)to;