[src/trunk]: src/sys/arch/powerpc/ibm4xx Assert that the size of a trap handl...

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

details:   https://anonhg.NetBSD.org/src/rev/67b4dda0ff41
branches:  trunk
changeset: 820011:67b4dda0ff41
user:      rin <rin%NetBSD.org@localhost>
date:      Mon Dec 26 21:25:08 2016 +0000

description:
Assert that the size of a trap handler does not exceed its room.

XXX
The debug exception is critical for ibm4xx. Since rev 1.24, we use the critical
trap hundler for it. Sorry for the wrong commit log for rev 1.24.

diffstat:

 sys/arch/powerpc/ibm4xx/ibm4xx_machdep.c |  5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diffs (26 lines):

diff -r d3bb7374978b -r 67b4dda0ff41 sys/arch/powerpc/ibm4xx/ibm4xx_machdep.c
--- a/sys/arch/powerpc/ibm4xx/ibm4xx_machdep.c  Mon Dec 26 21:16:06 2016 +0000
+++ b/sys/arch/powerpc/ibm4xx/ibm4xx_machdep.c  Mon Dec 26 21:25:08 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ibm4xx_machdep.c,v 1.24 2016/12/26 20:28:00 rin Exp $  */
+/*     $NetBSD: ibm4xx_machdep.c,v 1.25 2016/12/26 21:25:08 rin Exp $  */
 /*     Original: ibm40x_machdep.c,v 1.3 2005/01/17 17:19:36 shige Exp $ */
 
 /*
@@ -68,7 +68,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ibm4xx_machdep.c,v 1.24 2016/12/26 20:28:00 rin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ibm4xx_machdep.c,v 1.25 2016/12/26 21:25:08 rin Exp $");
 
 #include "opt_compat_netbsd.h"
 #include "opt_ddb.h"
@@ -193,6 +193,7 @@
        }
 
        for (size_t i = 0; i < __arraycount(trap_table); i++) {
+               KASSERT(trap_table[i].exc_size <= 0x100);
                trap_copy(trap_table[i].exc_addr, trap_table[i].exc_vector,
                    trap_table[i].exc_size);
        }