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sync with OpenBSD -current

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This commit is contained in:
purplerain 2024-01-21 01:41:26 +00:00
parent ed28f347da
commit cc6742f14d
Signed by: purplerain
GPG key ID: F42C07F07E2E35B7
20 changed files with 315 additions and 155 deletions
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17
lib/libc/sys/mimmutable.2
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@ -1,4 +1,4 @@
.\" $OpenBSD: mimmutable.2,v 1.3 2022/11/06 20:15:44 jmc Exp $
.\" $OpenBSD: mimmutable.2,v 1.4 2024/01/20 13:19:37 deraadt Exp $
.\"
.\" Copyright (c) 1991, 1993
.\" The Regents of the University of California. All rights reserved.
@ -29,7 +29,7 @@
.\"
.\" @(#)mimmutable.2 8.1 (Berkeley) 6/9/93
.\"
.Dd $Mdocdate: November 6 2022 $
.Dd $Mdocdate: January 20 2024 $
.Dt MIMMUTABLE 2
.Os
.Sh NAME
@ -81,16 +81,3 @@ The
.Fn mimmutable
function first appeared in
.Ox 7.3 .
.Sh CAVEATS
At present,
.Xr mprotect 2
may reduce permissions on immutable pages marked
.Dv PROT_READ | PROT_WRITE
to the less permissive
.Dv PROT_READ .
This one-way operation is permitted for an introductory period to observe how
software uses this mechanism.
It may change to require explicit mutable region annotation with
.Va __attribute__((section(".openbsd.mutable")))
and explicit calls to
.Fn mimmutable .