diff options
| author |   tedu <tedu@openbsd.org> | 2014-09-27 12:23:41 +0000 |
|---|---|---|
| committer | tedu <tedu@openbsd.org> | 2014-09-27 12:23:41 +0000 |
| commit | ded71d75433e1e529c5a7040602ac5a73e90562b (patch) | |
| tree | e438c6494259bfac0de919298d6e68c5eb13b86d /sys | |
| parent | Also in debug mode, close nullfd when it is not needed anymore. (diff) | |
| download | wireguard-openbsd-ded71d75433e1e529c5a7040602ac5a73e90562b.tar.xz wireguard-openbsd-ded71d75433e1e529c5a7040602ac5a73e90562b.zip | |
add back inverted poison patterns. keep high bits, but twiddle low bits.
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/kern/subr_poison.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/sys/kern/subr_poison.c b/sys/kern/subr_poison.c index 126462ba94f..95a4f87b77a 100644 --- a/sys/kern/subr_poison.c +++ b/sys/kern/subr_poison.c @@ -1,4 +1,4 @@ -/* $OpenBSD: subr_poison.c,v 1.11 2014/07/22 21:41:09 deraadt Exp $ */ +/* $OpenBSD: subr_poison.c,v 1.12 2014/09/27 12:23:41 tedu Exp $ */ /* * Copyright (c) 2013 Ted Unangst <tedu@openbsd.org> * @@ -44,7 +44,17 @@ poison_value(void *v) l = l >> PAGE_SHIFT; - return (l & 1) ? POISON0 : POISON1; + switch (l & 3) { + case 0: + return POISON0; + case 1: + return POISON1; + case 2: + return (POISON0 & 0xffff0000) | (~POISON0 & 0x0000ffff); + case 3: + return (POISON1 & 0xffff0000) | (~POISON1 & 0x0000ffff); + } + return 0; } void |