diff options
| author | Mark Kettenis <kettenis@cvs.openbsd.org> | 2020-02-18 12:19:12 +0000 |
|---|---|---|
| committer | Mark Kettenis <kettenis@cvs.openbsd.org> | 2020-02-18 12:19:12 +0000 |
| commit | abaeee0c2de5db354ea200288f678a16ca5ea4bb (patch) | |
| tree | 470771504e5b18405e7e6725c6b9836a6e05d677 /lib/csu | |
| parent | 7d507c040f5f8f249c657a3d207a3bf7bdc53eec (diff) | |
Now that the kernel skips the two instructions immediately following
a syscall, replace the double nop with a dsb nsh; isb; sequence which
stops the CPU from speculating any further. This fix was suggested
by Anthony Steinhauser.
ok deraadt@
Diffstat (limited to 'lib/csu')
| -rw-r--r-- | lib/csu/aarch64/md_init.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/lib/csu/aarch64/md_init.h b/lib/csu/aarch64/md_init.h index 48d0f29da96..36f475682b4 100644 --- a/lib/csu/aarch64/md_init.h +++ b/lib/csu/aarch64/md_init.h @@ -1,4 +1,4 @@ -/* $OpenBSD: md_init.h,v 1.6 2020/01/26 02:19:43 kettenis Exp $ */ +/* $OpenBSD: md_init.h,v 1.7 2020/02/18 12:19:11 kettenis Exp $ */ /*- * Copyright (c) 2001 Ross Harvey @@ -113,6 +113,6 @@ "_dl_exit: \n" \ " mov x8, #1 \n" \ " svc #0 \n" \ - " nop \n" \ - " nop \n" \ + " dsb nsh \n" \ + " isb \n" \ ".previous"); |