[src/trunk]: src/sys/arch/arm/cortex Make fp 0 on entry to idle_stack to ensu...

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

details:   https://anonhg.NetBSD.org/src/rev/a97c877a7911
branches:  trunk
changeset: 354948:a97c877a7911
user:      skrll <skrll%NetBSD.org@localhost>
date:      Wed Jul 05 20:53:40 2017 +0000

description:
Make fp 0 on entry to idle_stack to ensure we mark that we're top of
stack

diffstat:

 sys/arch/arm/cortex/a9_mpsubr.S |  3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diffs (17 lines):

diff -r c252c8bad8e9 -r a97c877a7911 sys/arch/arm/cortex/a9_mpsubr.S
--- a/sys/arch/arm/cortex/a9_mpsubr.S   Wed Jul 05 20:00:27 2017 +0000
+++ b/sys/arch/arm/cortex/a9_mpsubr.S   Wed Jul 05 20:53:40 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: a9_mpsubr.S,v 1.47 2016/10/04 15:18:23 kiyohara Exp $  */
+/*     $NetBSD: a9_mpsubr.S,v 1.48 2017/07/05 20:53:40 skrll Exp $     */
 /*-
  * Copyright (c) 2012 The NetBSD Foundation, Inc.
  * All rights reserved.
@@ -778,6 +778,7 @@
        movw    r2, #:lower16:MD_CPU_HATCH      // pass md_cpu_hatch
        movt    r2, #:upper16:MD_CPU_HATCH      // pass md_cpu_hatch
        bl      _C_LABEL(cpu_hatch)
+       mov     fp, #0                          // top stack frame
        b       _C_LABEL(idle_loop)             // never to return
 ASEND(cortex_mpcontinuation)