use movw (not movl) with (16-bit) segment registers.

cluebat from miod@

www/mongrel2/Makefile

@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.8 2013/03/11 11:44:43 espie Exp $
+# $OpenBSD: Makefile,v 1.9 2013/03/21 22:23:39 sthen Exp $
 
 # Some assembly required
 ONLY_FOR_ARCHS =i386 amd64
@@ -7,6 +7,7 @@ SHARED_ONLY =	Yes
 COMMENT =	language agnostic asynchronous web server
 
 DISTNAME =	mongrel2-1.8.0
+REVISION =	0
 CATEGORIES =	www
 
 HOMEPAGE =	http://mongrel2.org/

www/mongrel2/patches/patch-src_task_asm_S

@@ -0,0 +1,36 @@
+$OpenBSD: patch-src_task_asm_S,v 1.3 2013/03/21 22:23:40 sthen Exp $
+
+use movw with (16-bit) segment registers.
+
+--- src/task/asm.S.orig	Thu Mar 21 16:21:22 2013
++++ src/task/asm.S	Thu Mar 21 16:21:35 2013
+@@ -45,10 +45,10 @@
+ SET:
+     movl    4(%esp), %eax
+ 
+-    movl    8(%eax), %fs
+-    movl    12(%eax), %es
+-    movl    16(%eax), %ds
+-    movl    76(%eax), %ss
++    movw    8(%eax), %fs
++    movw    12(%eax), %es
++    movw    16(%eax), %ds
++    movw    76(%eax), %ss
+     movl    20(%eax), %edi
+     movl    24(%eax), %esi
+     movl    28(%eax), %ebp
+@@ -65,10 +65,10 @@ SET:
+ GET:
+     movl    4(%esp), %eax
+ 
+-    movl    %fs, 8(%eax)
+-    movl    %es, 12(%eax)
+-    movl    %ds, 16(%eax)
+-    movl    %ss, 76(%eax)
++    movw    %fs, 8(%eax)
++    movw    %es, 12(%eax)
++    movw    %ds, 16(%eax)
++    movw    %ss, 76(%eax)
+     movl    %edi, 20(%eax)
+     movl    %esi, 24(%eax)
+     movl    %ebp, 28(%eax)