[src/trunk]: src/sys/arch/arm/arm32 push/pop unsaved registers before using p...

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

details:   https://anonhg.NetBSD.org/src/rev/91765eaa5bef
branches:  trunk
changeset: 794073:91765eaa5bef
user:      matt <matt%NetBSD.org@localhost>
date:      Wed Mar 05 02:12:24 2014 +0000

description:
push/pop unsaved registers before using printf.

diffstat:

 sys/arch/arm/arm32/exception.S |  6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diffs (32 lines):

diff -r 57c8afde07ff -r 91765eaa5bef sys/arch/arm/arm32/exception.S
--- a/sys/arch/arm/arm32/exception.S    Wed Mar 05 02:10:39 2014 +0000
+++ b/sys/arch/arm/arm32/exception.S    Wed Mar 05 02:12:24 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: exception.S,v 1.20 2013/12/02 18:36:10 joerg Exp $     */
+/*     $NetBSD: exception.S,v 1.21 2014/03/05 02:12:24 matt Exp $      */
 
 /*
  * Copyright (c) 1994-1997 Mark Brinicombe.
@@ -51,7 +51,7 @@
 
 #include <arm/locore.h>
 
-       RCSID("$NetBSD: exception.S,v 1.20 2013/12/02 18:36:10 joerg Exp $")
+       RCSID("$NetBSD: exception.S,v 1.21 2014/03/05 02:12:24 matt Exp $")
 
        .text   
        .align  0
@@ -178,11 +178,13 @@
  *     it like a Data Abort.
  */
 ASENTRY_NP(address_exception_entry)
+       push    {r0-r3,ip,lr}
        mrs     r1, cpsr
        mrs     r2, spsr
        mov     r3, lr
        adr     r0, .Laddress_exception_msg
        bl      _C_LABEL(printf)        /* XXX CLOBBERS LR!! */
+       pop     {r0-r3,ip,lr}
        b       _ASM_LABEL(data_abort_entry)
 .Laddress_exception_msg:
        .asciz  "Address Exception CPSR=0x%08x SPSR=0x%08x LR=0x%08x\n"