lkml.org 
[lkml]   [2013]   [May]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCHv4] arm: Preserve the user r/w register TPIDRURW on context switch and fork
Am 08.05.2013 21:03, schrieb André Hentschel:
> From: =?UTF-8?q?Andr=C3=A9=20Hentschel?= <nerv@dawncrow.de>
>
> Since commit 6a1c53124aa1 the user writeable TLS register was zeroed to
> prevent it from being used as a covert channel between two tasks.
>
> There are more and more applications coming to WinRT, Wine could support them,
> but mostly they expect to have the thread environment block (TEB) in TPIDRURW.
>
> This patch preserves that register per thread instead of clearing it.
> Unlike the TPIDRURO, which is already switched, the TPIDRURW
> can be updated from userspace so needs careful treatment in the case that we
> modify TPIDRURW and call fork(). To avoid this we must always read
> TPIDRURW in copy_thread.
>
> Signed-off-by: André Hentschel <nerv@dawncrow.de>
> Signed-off-by: Will Deacon <will.deacon@arm.com>
> Signed-off-by: Jonathan Austin <jonathan.austin@arm.com>
>

Hi,
I'm not yet very familiar with the development process here,
am i getting no feedback on v4 because of the mergewindow being closed?
Or is there another reason? Sry for being impatient.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2013-05-18 17:41    [W:0.050 / U:0.060 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site