From: Jes Sorensen <jes@sgi.com>
To: Carlos Munoz <carlos@kenati.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 ?
Date: 10 Mar 2006 05:18:41 -0500 [thread overview]
Message-ID: <yq0ek1a38n2.fsf@jaguar.mkp.net> (raw)
In-Reply-To: <4410F1BE.7000904@kenati.com>
>>>>> "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.
Cheers,
Jes
next prev parent reply other threads:[~2006-03-10 10:18 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-10 1:44 Carlos Munoz
2006-03-10 1:45 ` Valdis.Kletnieks
2006-03-10 2:06 ` Lee Revell
2006-03-10 3:01 ` Carlos Munoz
2006-03-10 3:22 ` Lee Revell
2006-03-10 3:25 ` Carlos Munoz
2006-03-10 3:25 ` Lee Revell
2006-03-10 3:47 ` Carlos Munoz
2006-03-10 10:37 ` Denis Vlasenko
2006-03-10 11:05 ` Bart Hartgers
2006-03-10 18:03 ` Carlos Munoz
2006-03-10 18:33 ` linux-os (Dick Johnson)
2006-03-10 18:41 ` Ben Slusky
2006-03-10 19:18 ` Al Viro
2006-03-10 20:04 ` Carlos Munoz
2006-03-10 10:18 ` Jes Sorensen [this message]
2006-03-10 18:07 ` Carlos Munoz
2006-03-10 8:01 ` Arjan van de Ven
2006-03-10 2:02 ` Lee Revell
[not found] <5OEVB-3GX-15@gated-at.bofh.it>
2006-03-10 2:32 ` Robert Hancock
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