From: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Date: Thu, 19 Mar 2009 17:56:29 +0000 (-0700)
Subject: x86: signal: check signal stack overflow properly
X-Git-Tag: v2.6.30-rc3~72^2~20^6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=14fc9fbc700dc95b4f46ebd588169324fe6deff8;p=pandora-kernel.git

x86: signal: check signal stack overflow properly

Impact: cleanup

Check alternate signal stack overflow with proper stack pointer.
The stack pointer of the next signal frame is different if that
task has i387 state.

On x86_64, redzone would be included.

No need to check SA_ONSTACK if we're already using alternate signal stack.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Cc: Roland McGrath <roland@redhat.com>
LKML-Reference: <49C2874D.3080002@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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