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Re: Adding new syscalls using LKM interface

On Tue, Oct 02, 2001 at 09:25:14AM -0400, Fabrice Tchakountio wrote:
> All -
> 
> Can someone tell me how to add a "fresh" syscall to a running kernel
> without replacing an existing syscall based on the LKM interface?
> 
> Unlike some BSD kernels (FreeBSD in particular), it appears to me
> that we can't dynamically add/remove new syscalls without touching
> some existing syscalls.

It's a policy decision to not allow loadable syscall modules.
On some architectures you can modify the sys_call_table array directly,
but that is not only unportable but also very racy.

	Christoph

-- 
Of course it doesn't work. We've performed a software upgrade.
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