linux-kernel - Re: [PATCH] fix PPC floating point debug

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Fri, 27 Nov 2009 13:44:19 +0100
From:	Stefani Seibold <stefani@...bold.net>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH] fix PPC floating point debug

Am Freitag, den 27.11.2009, 22:01 +1100 schrieb Benjamin Herrenschmidt: 
> On Fri, 2009-11-27 at 09:59 +0100, Stefani Seibold wrote:
> > The PPC architecture is unable to debug applications using hardware
> > floating point, because it would not save the floating point registers.
> > 
> > After returning from the debugger, the contents of register was
> > modified. This patch fix this bug.
> 
> I'm not sure what problem you are trying to fix... debugging FP apps
> works just fine afaik. You don't need to flush the FP state into the
> thread when delivering the SIGTRAP. If you have a signal handler, that
> will be done for you by the signal code before laying out the signal
> frame. If you are using ptrace, you should be using the appropriate
> ptrace calls to retrieve the FP state and they should do the right thing
> to.
> 

Aeh... Forget it! Thank you for the support.

Stefani


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/