From: Aurelien Jarno <aurelien@aurel32.net>
Date: Wed, 5 Mar 2008 18:14:24 +0000 (+0100)
Subject: x86: clear DF before calling signal handler
X-Git-Tag: v2.6.25-rc5~14^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e40cd10ccff3d9fbffd57b93780bee4b7b9bff51;p=pandora-kernel.git

x86: clear DF before calling signal handler

The Linux kernel currently does not clear the direction flag before
calling a signal handler, whereas the x86/x86-64 ABI requires that.

Linux had this behavior/bug forever, but this becomes a real problem
with gcc version 4.3, which assumes that the direction flag is
correctly cleared at the entry of a function.

This patches changes the setup_frame() functions to clear the
direction before entering the signal handler.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: H. Peter Anvin <hpa@zytor.com>
---

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