[src/trunk]: src/sys/arch/i386/include i586 and below don't have this 3-byte ...

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

details:   https://anonhg.NetBSD.org/src/rev/4540491fecbd
branches:  trunk
changeset: 319974:4540491fecbd
user:      maxv <maxv%NetBSD.org@localhost>
date:      Sun Jun 17 15:46:39 2018 +0000

description:
i586 and below don't have this 3-byte nop, so use three 1-byte nops,
reported by Nathanial Sloss

diffstat:

 sys/arch/i386/include/frameasm.h |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (23 lines):

diff -r ae84b31ec440 -r 4540491fecbd sys/arch/i386/include/frameasm.h
--- a/sys/arch/i386/include/frameasm.h  Sun Jun 17 15:06:27 2018 +0000
+++ b/sys/arch/i386/include/frameasm.h  Sun Jun 17 15:46:39 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: frameasm.h,v 1.25 2018/01/27 18:48:59 maxv Exp $       */
+/*     $NetBSD: frameasm.h,v 1.26 2018/06/17 15:46:39 maxv Exp $       */
 
 #ifndef _I386_FRAMEASM_H_
 #define _I386_FRAMEASM_H_
@@ -42,11 +42,11 @@
 
 #define SMAP_ENABLE \
        HOTPATCH(HP_NAME_CLAC, 3)               ; \
-       .byte 0x0F, 0x1F, 0x00
+       .byte 0x90, 0x90, 0x90
 
 #define SMAP_DISABLE \
        HOTPATCH(HP_NAME_STAC, 3)               ; \
-       .byte 0x0F, 0x1F, 0x00
+       .byte 0x90, 0x90, 0x90
 
 /*
  * These are used on interrupt or trap entry or exit.