From: Ralf Baechle <ralf@oss.sgi.com>
To: Carsten Langgaard <carstenl@mips.com>
Cc: Jun Sun <jsun@mvista.com>, linux-mips@oss.sgi.com
Subject: Re: an old FPU context corruption problem when signal happens
Date: Tue, 25 Dec 2001 04:41:25 -0200 [thread overview]
Message-ID: <20011225044125.A16759@dea.linux-mips.net> (raw)
In-Reply-To: <3C219A3B.6DA93A75@mips.com>; from carstenl@mips.com on Thu, Dec 20, 2001 at 08:58:51AM +0100
On Thu, Dec 20, 2001 at 08:58:51AM +0100, Carsten Langgaard wrote:
> Are you sure this hasn't been fix in the latest sources (2.4.16) ?
> I have send a patch to Ralf, which I believe solves a similar problem as
> you describe below.
>
> Ralf have you applied the patch ?
Well, I applied it but it's really broken as something can be. Just an
example:
+ /*
+ * FPU emulator may have it's own trampoline active just
+ * above the user stack, 16-bytes before the next lowest
+ * 16 byte boundary. Try to avoid trashing it.
+ */
+ sp -= 32;
So the whole thing needs some overhaul.
Ralf
next prev parent reply other threads:[~2001-12-26 21:43 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-20 1:04 an old FPU context corruption problem when signal happens Jun Sun
2001-12-20 7:58 ` Carsten Langgaard
2001-12-20 17:16 ` Jun Sun
2001-12-25 6:41 ` Ralf Baechle [this message]
2001-12-25 6:51 ` Ralf Baechle
2001-12-27 10:53 ` Carsten Langgaard
2002-01-02 4:34 ` Ralf Baechle
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