[src/trunk]: src/sys/arch/arm/include/arm32 Add code to make sure the trapfra...

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

details:   https://anonhg.NetBSD.org/src/rev/f0c12330d38f
branches:  trunk
changeset: 780623:f0c12330d38f
user:      matt <matt%NetBSD.org@localhost>
date:      Tue Jul 31 15:47:58 2012 +0000

description:
Add code to make sure the trapframe is aligned to a doubleword boundary.

diffstat:

 sys/arch/arm/include/arm32/frame.h |  4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diffs (18 lines):

diff -r f2c238ffd5f5 -r f0c12330d38f sys/arch/arm/include/arm32/frame.h
--- a/sys/arch/arm/include/arm32/frame.h        Tue Jul 31 14:23:33 2012 +0000
+++ b/sys/arch/arm/include/arm32/frame.h        Tue Jul 31 15:47:58 2012 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: frame.h,v 1.26 2012/07/31 08:01:30 matt Exp $  */
+/*     $NetBSD: frame.h,v 1.27 2012/07/31 15:47:58 matt Exp $  */
 
 /*
  * Copyright (c) 1994-1997 Mark Brinicombe.
@@ -372,6 +372,8 @@
        mrs     r3, spsr;               /* Save xxx32 spsr */              \
        SET_CPSR_MODE(r2, PSR_SVC32_MODE);                                 \
        mov     r2, sp;                 /* Save SVC sp */                  \
+       tst     sp, #4;                 /* check for alignment */          \
+       subne   sp, sp, #4;             /* adjust if not aligned */        \
        str     r0, [sp, #-4]!;         /* Push return address */          \
        str     lr, [sp, #-4]!;         /* Push SVC lr */                  \
        str     r2, [sp, #-4]!;         /* Push SVC sp */                  \