[src/trunk]: src/sys/arch/vax/include Change CASMAGIC to 0xFEDABABE so that i...

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

details:   https://anonhg.NetBSD.org/src/rev/5c24fa639b98
branches:  trunk
changeset: 374032:5c24fa639b98
user:      ragge <ragge%NetBSD.org@localhost>
date:      Sun Mar 26 12:23:42 2023 +0000

description:
Change CASMAGIC to 0xFEDABABE so that it cannot accidentally end up in
valid kernel memory.  Due to the VARM accesses above S0 should always
give a ptelen trap.
Bug found by Kalvis Duckmanton.

diffstat:

 sys/arch/vax/include/trap.h |  4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diffs (18 lines):

diff -r 6349fa2ea50d -r 5c24fa639b98 sys/arch/vax/include/trap.h
--- a/sys/arch/vax/include/trap.h       Sun Mar 26 12:21:09 2023 +0000
+++ b/sys/arch/vax/include/trap.h       Sun Mar 26 12:23:42 2023 +0000
@@ -1,4 +1,4 @@
-/*      $NetBSD: trap.h,v 1.24 2011/07/03 02:18:20 matt Exp $     */
+/*      $NetBSD: trap.h,v 1.25 2023/03/26 12:23:42 ragge Exp $     */
 
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
@@ -74,7 +74,7 @@
 #define        AFLT_FLTUND     0xa     /* floating underflow */
 
 /* Used by RAS to detect an interrupted CAS */
-#define        CASMAGIC        0xBEDABABE /* high end of S0 space */
+#define        CASMAGIC        0xFEDABABE /* always invalid space */
 
 /* Trap's coming from user mode */
 #define        T_USER  0x100