$NetBSD: patch-dn,v 1.3 2014/11/30 08:40:51 spz Exp $

http://gnats.netbsd.org/45201

--- mono/mini/mini-amd64.h.orig	2014-10-04 09:27:43.000000000 +0000
+++ mono/mini/mini-amd64.h
@@ -279,6 +279,10 @@ typedef struct {
 
 #define MONO_ARCH_NOMAP32BIT
 
+#elif defined (__DragonFly__)
+
+#define MONO_ARCH_NOMAP32BIT
+
 #elif defined (__NetBSD__)
 
 #define REG_RAX 14
