details: https://anonhg.NetBSD.org/src/rev/578affe500ab
branches: trunk
changeset: 833698:578affe500ab
user: ryo <ryo%NetBSD.org@localhost>
date: Mon Jul 09 06:10:21 2018 +0000
description:
keep stack pointer when changing from EL2 to EL1.
diffstat:
sys/arch/aarch64/aarch64/locore_el2.S | 14 ++++++++------
1 files changed, 8 insertions(+), 6 deletions(-)
diffs (41 lines):
diff -r beadebd052f4 -r 578affe500ab sys/arch/aarch64/aarch64/locore_el2.S
--- a/sys/arch/aarch64/aarch64/locore_el2.S Mon Jul 09 06:08:42 2018 +0000
+++ b/sys/arch/aarch64/aarch64/locore_el2.S Mon Jul 09 06:10:21 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: locore_el2.S,v 1.1 2018/04/01 04:35:03 ryo Exp $ */
+/* $NetBSD: locore_el2.S,v 1.2 2018/07/09 06:10:21 ryo Exp $ */
/*-
* Copyright (c) 2012-2014 Andrew Turner
@@ -32,17 +32,15 @@
#include <aarch64/hypervisor.h>
#include "assym.h"
-RCSID("$NetBSD: locore_el2.S,v 1.1 2018/04/01 04:35:03 ryo Exp $")
+RCSID("$NetBSD: locore_el2.S,v 1.2 2018/07/09 06:10:21 ryo Exp $")
/* for use in #include "locore_el2.S" */
.text
drop_to_el1_inline:
- mov x27, sp
- mov x28, lr
+ mov x8, lr
bl drop_to_el1
- mov lr, x28
- mov sp, x27
+ mov lr, x8
b drop_to_el1_inline_done
.text
@@ -117,6 +115,10 @@
msr icc_sre_el2, x2
2:
+ /* keep stack pointer */
+ mov x0, sp
+ msr sp_el1, x0
+
/* Set the address to return to our return address */
msr elr_el2, x30
isb