From: Dan Malek <dan@embeddededge.com>
To: "Fillod Stephane" <stephane.fillod@thomson.net>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: [PATCH] invalid instructions in kernel mode
Date: Thu, 31 Mar 2005 13:15:57 -0500 [thread overview]
Message-ID: <074219cef09e4112ab23d9168d881517@embeddededge.com> (raw)
In-Reply-To: <1CFEB358338412458B21FAA0D78FE86D4F0D23@rennsmail02.eu.thmulti.com>
On Mar 31, 2005, at 12:47 PM, Fillod Stephane wrote:
> When CPU has no (classic) FPU, and math emulation is disabled,
> fp instructions are not allowed in kernel mode.
FP Instructions are never allowed in kernel mode regardless of the CPU.
However, with math emulation disabled and no FPU, we still emulate
FP load/store operations because they are usually hard coded in
some of the context save/restore functions of the C library.
> This bug has been found with crashme (crash01) of LTP, on a e500
> system.
What is the bug? This patch disables a big feature we have been
using for many years. Please take another look at this.
Thanks.
-- Dan
next prev parent reply other threads:[~2005-03-31 18:16 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-31 17:47 [PATCH] invalid instructions in kernel mode Fillod Stephane
2005-03-31 18:15 ` Dan Malek [this message]
2005-04-01 10:04 ` Kumar Gala
2005-04-07 17:38 ` Tom Rini
2005-04-07 21:41 ` Kumar Gala
2005-04-07 22:14 ` Tom Rini
2005-04-07 22:29 ` Kumar Gala
2005-04-08 16:02 ` Kumar Gala
-- strict thread matches above, loose matches on Subject: below --
2005-03-31 19:17 Fillod Stephane
2005-04-01 3:45 ` Dan Malek
2005-04-05 12:24 Fillod Stephane
2005-04-05 16:16 ` Dan Malek
2005-04-05 12:25 Fillod Stephane
2005-04-08 17:36 Fillod Stephane
2005-04-11 15:39 ` Kumar Gala
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