Date:	Sun, 25 May 2008 11:35:31 +0200
From:	devzero@....de
To:	Shuduo Sang <sangshuduo@...il.com>
Cc:	bosko.radivojevic@...il.com, linux-kernel@...r.kernel.org
Subject: Re: Inserting code from userspace to kernel space

> someone does not want to leak propertied algorithm out with GPL. This
> can be a way to protect.

this can be illegal, too.

http://www.gnu.org/licenses/gpl-faq.html#ModifiedJustBinary

>Can I release a modified version of a GPL-covered program in binary form only?
>No. The whole point of the GPL is that all modified versions must be free software — which means, 
>in particular, that the source code of the modified version is available to the users




> On Fri, May 23, 2008 at 10:30 PM,  <devzero@....de> wrote:
> >>> I know this sounds quite weird, but maybe there is a project that can help us ;)
> >>>
> >>
> >>actually you can implement a parser/interpretor, whatever you name it,
> >>in kernel space. And you can send the
> >>function code from user space to kernel space by device driver
> >>interface. the parser can parse that and do something
> >>practical function in kernel.
> >>
> >>I have worked on a similar task in a product powered by linux. It works great.
> >
> > any pointer to the sourcecode so bosko (and others) can profit from that ?
> >
> 
> someone does not want to leak propertied algorithm out with GPL. This
> can be a way to protect.
> 
> >
> >
> >
> > List:       linux-kernel
> > Subject:    Re: Inserting code from userspace to kernel space
> > From:       "Shuduo Sang" <sangshuduo () gmail ! com>
> > Date:       2008-05-22 16:04:35
> > Message-ID: ee101c360805220904h1c69db12q3048d0347d27c461 () mail ! gmail ! com
> > [Download message RAW]
> >
> > On Thu, May 22, 2008 at 8:41 PM, Bosko Radivojevic
> > <bosko.radivojevic@...il.com> wrote:
> >> Hi!
> >>
> >> I'm looking for a way to insert code from user space to the kernel
> >> space, but without using kernel module. Actually, we are working on a
> >> system that has to allow end user to change part of code (one or two
> >> functions) that is executed from the kernel space.
> >>
> >> For now we have two different kernel modules, one exporting a function
> >> which another module uses. Process of compiling kernel module is quite
> >> ineligible for standard end user (along with the requirement to
> >> support multi platform cross compiling) compared to just cross
> >> compiling a simple code that doesn't use any libraries than libc.
> >>
> >> I know this sounds quite weird, but maybe there is a project that can help us ;)
> >>
> >
> > actually you can implement a parser/interpretor, whatever you name it,
> > in kernel space. And you can send the
> > function code from user space to kernel space by device driver
> > interface. the parser can parse that and do something
> > practical function in kernel.
> >
> > I have worked on a similar task in a product powered by linux. It works great.
> >
> >> Sincerely,
> >> Bosko
> >> --
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> >
> 


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