From 2121e75b3fa31e6d2364ba426d44b9c9defea432 Mon Sep 17 00:00:00 2001
From: bjh21 <bjh21@NetBSD.org>
Date: Sat, 14 Oct 2006 17:51:37 +0000
Subject: [PATCH] When forking a new LWP, if a new user stack pointer is
 provided, use it. Necessary to make regress/lib/libc/clone pass.

---
 sys/arch/acorn26/acorn26/vm_machdep.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/sys/arch/acorn26/acorn26/vm_machdep.c b/sys/arch/acorn26/acorn26/vm_machdep.c
index 11dc1d019223..2a8d85876eaa 100644
--- a/sys/arch/acorn26/acorn26/vm_machdep.c
+++ b/sys/arch/acorn26/acorn26/vm_machdep.c
@@ -1,4 +1,4 @@
-/* $NetBSD: vm_machdep.c,v 1.11 2006/05/10 06:24:02 skrll Exp $ */
+/* $NetBSD: vm_machdep.c,v 1.12 2006/10/14 17:51:37 bjh21 Exp $ */
 
 /*-
  * Copyright (c) 2000, 2001 Ben Harris
@@ -64,7 +64,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vm_machdep.c,v 1.11 2006/05/10 06:24:02 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vm_machdep.c,v 1.12 2006/10/14 17:51:37 bjh21 Exp $");
 
 #include <sys/param.h>
 #include <sys/buf.h>
@@ -128,6 +128,9 @@ cpu_lwp_fork(struct lwp *l1, struct lwp *l2, void *stack, size_t stacksize,
 		bzero(tf, sizeof(*tf));
 	else
 		*tf = *l1->l_addr->u_pcb.pcb_tf;
+	/* If specified, give the child a different stack. */
+	if (stack != NULL)
+		tf->tf_usr_sp = (u_int)stack + stacksize;
 	l2->l_addr->u_pcb.pcb_tf = tf;
 	/* Fabricate a new switchframe */
 	bzero(sf, sizeof(*sf));