Message-ID: <4411C07C.4000005@kenati.com>
Date: Fri, 10 Mar 2006 10:07:56 -0800
From: Carlos Munoz <carlos@kenati.com>
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To: Jes Sorensen <jes@sgi.com>
CC: Lee Revell <rlrevell@joe-job.com>, Valdis.Kletnieks@vt.edu,
       linux-kernel@vger.kernel.org
Subject: Re: How can I link the kernel with libgcc ?
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Jes Sorensen wrote:

>>>>>>"Carlos" == Carlos Munoz <carlos@kenati.com> writes:
>>>>>>            
>>>>>>
>
>Carlos> I figured out how to get the driver to use floating point
>Carlos> operations. I included source code (from an open source math
>Carlos> library) for the log10 function in the driver. Then I added
>Carlos> the following lines to the file arch/sh/kernel/sh_ksyms.c:
>
>Bad bad bad!
>
>You shouldn't be using floating point in the kernel at all! Most
>architectures do not save the full floating point register set on
>entry so if you start messing with the fp registers you may corrupt
>user space applications.
>
>You need to either write a customer user space app or use a table as
>Arjan suggested.
>E_OK
>Cheers,
>Jes
>  
>
Hi Jes,

I wasn't aware that floating point registers are not save. I guess I 
have no choice but to use a table.

Thanks,


Carlos Munoz
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