override KSTACK_LOWEST_ADDR and KSTACK_SIZE for redzone.

sys/arch/i386/include/proc.h

@@ -1,4 +1,4 @@
-/*	$NetBSD: proc.h,v 1.14 2001/09/10 10:11:21 fvdl Exp $	*/
+/*	$NetBSD: proc.h,v 1.15 2002/10/11 17:49:11 yamt Exp $	*/
 
 /*
  * Copyright (c) 1991 Regents of the University of California.
@@ -51,3 +51,12 @@ struct mdproc {
 /* md_flags */
 #define	MDP_USEDFPU	0x0001	/* has used the FPU */
 #define MDP_USEDMTRR	0x0002	/* has set volatile MTRRs */
+
+/* kernel stack params */
+#ifndef NOREDZONE
+/* override default for redzone */
+#define	KSTACK_LOWEST_ADDR(p)	\
+	((caddr_t)ALIGN((p)->p_addr + 1) + NBPG)
+#define	KSTACK_SIZE	\
+	(USPACE - NBPG*2)
+#endif