linux-kernel - Re: Trying to convert old modules to newer kernels

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Message-ID: <Pine.LNX.4.61.0712210810450.13248@chaos.analogic.com>
Date:	Fri, 21 Dec 2007 08:11:34 -0500
From:	"linux-os (Dick Johnson)" <linux-os@...logic.com>
To:	"Bodo Eggert" <7eggert@....de>
Cc:	"Sam Ravnborg" <sam@...nborg.org>,
	"Lennart Sorensen" <lsorense@...lub.uwaterloo.ca>,
	"Linux kernel" <linux-kernel@...r.kernel.org>
Subject: Re: Trying to convert old modules to newer kernels


On Thu, 20 Dec 2007, Bodo Eggert wrote:

> linux-os (Dick Johnson) <linux-os@...logic.com> wrote:
>> On Thu, 20 Dec 2007, Sam Ravnborg wrote:
>
>>>> It never gets to the printk(). You were right about the
>>>> compilation. Somebody changed the kernel to compile with
>>>> parameter passing in REGISTERS! This means that EVERYTHING
>>>> needs to be compiled the same way, 'C' calling conventions
>>>> were not good enough!
>>>
>>> How did you build the module. It reads like you failed to use
>>> kbuild to build your module which is why you did not pass
>>> correct options to gcc - correct?
>>>
>>> If you did not use kbuild - why not?
>>> Is there anything missing you need?
>
>> I need to get rid of -mregparm=3 on gcc's command line. It
>> is completely incompatible with the standard calling conventions
>> used in all our assembly-language files in our drivers. We make
>> very high-speed number-crunching drivers that munge high-speed
>> data into images. We need to do that in assembly as we have
>> always done.
>
> According to my quick googling, "__attribute__((regparm,0))" is what you need.
>

Yes, thanks! I don't need to change anything except the
declarations of the assembly-language stuff.


Cheers,
Dick Johnson
Penguin : Linux version 2.6.22.1 on an i686 machine (5588.29 BogoMips).
My book : http://www.AbominableFirebug.com/
_


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