[src/trunk]: src/sys/arch/mips/mips Make sure the pcb and initial frame area ...

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

details:   https://anonhg.NetBSD.org/src/rev/dd534de38b74
branches:  trunk
changeset: 750082:dd534de38b74
user:      matt <matt%NetBSD.org@localhost>
date:      Tue Dec 15 18:24:47 2009 +0000

description:
Make sure the pcb and initial frame area of lwp0 are zeroed since these will
be the basis for all future lwps.

diffstat:

 sys/arch/mips/mips/mips_machdep.c |  9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diffs (30 lines):

diff -r 9ebb5c0eb0c5 -r dd534de38b74 sys/arch/mips/mips/mips_machdep.c
--- a/sys/arch/mips/mips/mips_machdep.c Tue Dec 15 16:31:54 2009 +0000
+++ b/sys/arch/mips/mips/mips_machdep.c Tue Dec 15 18:24:47 2009 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: mips_machdep.c,v 1.223 2009/12/14 00:46:06 matt Exp $  */
+/*     $NetBSD: mips_machdep.c,v 1.224 2009/12/15 18:24:47 matt Exp $  */
 
 /*
  * Copyright 2002 Wasabi Systems, Inc.
@@ -112,7 +112,7 @@
 
 #include <sys/cdefs.h>                 /* RCS ID & Copyright macro defns */
 
-__KERNEL_RCSID(0, "$NetBSD: mips_machdep.c,v 1.223 2009/12/14 00:46:06 matt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: mips_machdep.c,v 1.224 2009/12/15 18:24:47 matt Exp $");
 
 #include "opt_cputype.h"
 #include "opt_compat_netbsd32.h"
@@ -1649,6 +1649,11 @@
 
        struct pcb * const pcb0 = lwp_getpcb(&lwp0);
        lwp0.l_md.md_regs = (struct frame *)(v + USPACE) - 1;
+       /*
+        * Now zero out the only two areas of the uarea that we care about.
+        */
+       memset(lwp0.l_md.md_regs, 0, sizeof(*lwp0.l_md.md_regs));
+       memset(pcb0, 0, sizeof(*pcb0));
 #ifdef _LP64
        lwp0.l_md.md_regs->f_regs[_R_SR] = MIPS_SR_KX;
 #endif