[src/trunk]: src/sys/arch/usermode/usermode Add dirty copy of child_return()

[reinoud <reinoud%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/f48a00782640
branches:  trunk
changeset: 768840:f48a00782640
user:      reinoud <reinoud%NetBSD.org@localhost>
date:      Sat Aug 27 21:17:26 2011 +0000

description:
Add dirty copy of child_return()

diffstat:

 sys/arch/usermode/usermode/syscall.c |  20 ++++++++++++++++++--
 1 files changed, 18 insertions(+), 2 deletions(-)

diffs (48 lines):

diff -r 07c8b63655cb -r f48a00782640 sys/arch/usermode/usermode/syscall.c
--- a/sys/arch/usermode/usermode/syscall.c      Sat Aug 27 21:16:15 2011 +0000
+++ b/sys/arch/usermode/usermode/syscall.c      Sat Aug 27 21:17:26 2011 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: syscall.c,v 1.2 2009/10/21 16:07:00 snj Exp $ */
+/* $NetBSD: syscall.c,v 1.3 2011/08/27 21:17:26 reinoud Exp $ */
 
 /*-
  * Copyright (c) 2007 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -27,21 +27,37 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: syscall.c,v 1.2 2009/10/21 16:07:00 snj Exp $");
+__KERNEL_RCSID(0, "$NetBSD: syscall.c,v 1.3 2011/08/27 21:17:26 reinoud Exp $");
 
 #include <sys/types.h>
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/proc.h>
+#include <sys/lwp.h>
+#include <sys/sched.h>
+#include <sys/userret.h>
+#include <machine/pcb.h>
 
 void   syscall(void);
 
 void
 child_return(void *arg)
 {
+printf("child returned! arg %p\n", arg);
+printf("xxx now what? switch to `userland' i.e. new code?\n");
+       lwp_t *l = arg;
+//     struct pcb *pcb = lwp_getpcb(l);
+//     struct trapframe *frame = pcb->pcb_tf;
+
+/* XXX? */
+       //frame->tf_r0 = 0;
+
+       mi_userret(l);
+//     ktrsysret(SYS_fork, 0, 0);
 }
 
 void
 syscall(void)
 {
+printf("syscall called !\n");
 }