Ditto.

src/libsec/386/md5block.spp

diff --git a/src/libsec/386/md5block.spp b/src/libsec/386/md5block.spp
index 602c970..61d86c3 100644
--- a/src/libsec/386/md5block.spp
+++ b/src/libsec/386/md5block.spp
@@ -102,14 +102,16 @@
 	orl B, %edi;\
 	xorl C, %edi;\
 
-#define	DATA	8
-#define	LEN	12
-#define	STATE	16
+#define	STACKSIZE	20
 
-#define EDATA	(-4)
-#define OLDEBX	(-8)
-#define OLDESI	(-12)
-#define OLDEDI	(-16)
+#define	DATA	(STACKSIZE+8)
+#define	LEN	(STACKSIZE+12)
+#define	STATE	(STACKSIZE+16)
+
+#define EDATA	(STACKSIZE-4)
+#define OLDEBX	(STACKSIZE-8)
+#define OLDESI	(STACKSIZE-12)
+#define OLDEDI	(STACKSIZE-16)
 
 	.text
 
@@ -120,6 +122,7 @@
 
 	/* Prelude */
 	pushl %ebp
+	subl $(STACKSIZE), %esp
 	movl %ebx, OLDEBX(%esp)
 	movl %esi, OLDESI(%esp)
 	movl %edi, OLDEDI(%esp)
@@ -235,7 +238,7 @@
 	movl OLDEBX(%esp), %ebx
 	movl OLDESI(%esp), %esi
 	movl OLDEDI(%esp), %edi
-	movl %esp, %ebp
-	leave
+	addl $(STACKSIZE), %esp
+	popl %ebp
 	ret