[src/trunk]: src/sys/rump/librump/rumpkern Support multiple syscall emuls.

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

details:   https://anonhg.NetBSD.org/src/rev/8b179958cd36
branches:  trunk
changeset: 785296:8b179958cd36
user:      pooka <pooka%NetBSD.org@localhost>
date:      Thu Mar 07 18:49:13 2013 +0000

description:
Support multiple syscall emuls.

Rump kernels with only local clients have it easy, since they have to
support at most two syscall vectors (some calls such as mount/unmount
can be made only through the "native" NetBSD vector).  Remote clients
are a whole different tin of green beans.  This change addresses local
clients only.

diffstat:

 sys/rump/librump/rumpkern/lwproc.c        |  21 +++++++++++++++++----
 sys/rump/librump/rumpkern/rumpkern.ifspec |   3 ++-
 2 files changed, 19 insertions(+), 5 deletions(-)

diffs (76 lines):

diff -r 4a52f23bb317 -r 8b179958cd36 sys/rump/librump/rumpkern/lwproc.c
--- a/sys/rump/librump/rumpkern/lwproc.c        Thu Mar 07 18:33:27 2013 +0000
+++ b/sys/rump/librump/rumpkern/lwproc.c        Thu Mar 07 18:49:13 2013 +0000
@@ -1,4 +1,4 @@
-/*      $NetBSD: lwproc.c,v 1.19 2012/11/13 20:10:02 pooka Exp $       */
+/*      $NetBSD: lwproc.c,v 1.20 2013/03/07 18:49:13 pooka Exp $       */
 
 /*
  * Copyright (c) 2010, 2011 Antti Kantee.  All Rights Reserved.
@@ -26,7 +26,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: lwproc.c,v 1.19 2012/11/13 20:10:02 pooka Exp $");
+__KERNEL_RCSID(0, "$NetBSD: lwproc.c,v 1.20 2013/03/07 18:49:13 pooka Exp $");
 
 #include <sys/param.h>
 #include <sys/atomic.h>
@@ -44,6 +44,8 @@
 
 #include "rump_private.h"
 
+struct emul *emul_default = &emul_netbsd;
+
 static void
 lwproc_proc_free(struct proc *p)
 {
@@ -90,7 +92,7 @@
 /*
  * Allocate a new process.  Mostly mimic fork by
  * copying the properties of the parent.  However, there are some
- * differences.  For example, we never share the fd table.
+ * differences.
  *
  * Switch to the new lwp and return a pointer to it.
  */
@@ -125,7 +127,7 @@
        p->p_stats = pstatscopy(parent->p_stats);
 
        p->p_vmspace = vmspace_kernel();
-       p->p_emul = &emul_netbsd;
+       p->p_emul = emul_default;
        if (*parent->p_comm)
                strcpy(p->p_comm, parent->p_comm);
        else
@@ -400,3 +402,14 @@
                return NULL;
        return l;
 }
+
+/* this interface is under construction (like the proverbial 90's web page) */
+int rump_i_know_what_i_am_doing_with_sysents = 0;
+void
+rump_lwproc_sysent_usenative()
+{
+
+       if (!rump_i_know_what_i_am_doing_with_sysents)
+               panic("don't use rump_lwproc_sysent_usenative()");
+       curproc->p_emul = &emul_netbsd;
+}
diff -r 4a52f23bb317 -r 8b179958cd36 sys/rump/librump/rumpkern/rumpkern.ifspec
--- a/sys/rump/librump/rumpkern/rumpkern.ifspec Thu Mar 07 18:33:27 2013 +0000
+++ b/sys/rump/librump/rumpkern/rumpkern.ifspec Thu Mar 07 18:49:13 2013 +0000
@@ -1,4 +1,4 @@
-;      $NetBSD: rumpkern.ifspec,v 1.10 2011/01/02 12:52:25 pooka Exp $
+;      $NetBSD: rumpkern.ifspec,v 1.11 2013/03/07 18:49:13 pooka Exp $
 
 NAME|kern
 PUBHDR|include/rump/rumpkern_if_pub.h
@@ -28,5 +28,6 @@
 void           |lwproc_switch          |struct lwp *
 void           |lwproc_releaselwp      |void
 struct lwp *   |lwproc_curlwp          |void
+void           |lwproc_sysent_usenative|void
 
 void           |allbetsareoff_setid    |pid_t, int