preferable way to control kernel module

[John Baldwin]

On Thursday 11 August 2005 12:16 pm, Dirk GOUDERS wrote:
>  > > Thank you for advise. But I wonder: what is wrong with syscall
>  > > approach (via SYSCALL_MODULE macro)?
>  >
>  > I just haven't done one personally.  I think there's also a lot more
>  > potenti al
>  > for collisions when trying to pick a syscall number versus picking a
>  > string name for a sysctl or /dev entry.
>
> Shouldn't that be no problem if he sets the offset parameter to
> SYSCALL_MODULE to NO_SYSCALL (get the next free offset)?

But then you have to communicate the syscall number out to your userland 
applications somehow, and the applications have to know how to invoke a 
syscall by hand (perhaps they could use the syscall() function, but still).

-- 
John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org