linux-kernel - Re: [RFC][PATCH] x86: PUSH_AND_CLEAR_REGS

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20220408231447.GS2731@worktop.programming.kicks-ass.net>
Date:   Sat, 9 Apr 2022 01:14:47 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     x86@...nel.org, Lai Jiangshan <jiangshanlai@...il.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     Andrew Cooper <Andrew.Cooper3@...rix.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH] x86: PUSH_AND_CLEAR_REGS_COMPAT

On Sat, Apr 09, 2022 at 12:38:27AM +0200, Peter Zijlstra wrote:
> 
> How insane?

Anyway, the questino is; since int80 doesn't wipe the high regs, can we
get away with the SYS*_compat things not doing that either and then all
using the normal PUSH_AND_CLEAR_REGS without having to invent _COMPAT
for that?