Date: Thu, 25 Feb 1999 00:03:21 +0000 From: Ben Smithurst <ben@scientia.demon.co.uk> To: Gurudatt Shenoy <gurudatt@cs.tamu.edu> Cc: freebsd-questions@freebsd.org Subject: Re: Question: Adding a new system call Message-ID: <19990225000321.A16445@scientia.demon.co.uk> In-Reply-To: <Pine.GSO.3.96.990221122904.10095A-100000@dilbert> References: <Pine.GSO.3.96.990221122904.10095A-100000@dilbert>
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Gurudatt Shenoy wrote:
> I added a new system call (new_write) to the freebsd (2.2.7) kernel. The
> kernel compiled successfully but when I tried to use the call in a
> program, I got the following error:
> "Undefined symbol '_new_write' referenced from text segment"
>
>
> What am I missing? The steps I followed to add my system call were:
>
> 1. Declared a new entry in syscalls.master
> 326 STD 0 BSD { void new_write(void);}
> (325 is currently the last entry in syscalls.master)
> 2. Created a new file (called new_write.c) in sys/kern, containing the
> function definition for new_write
I'm not exactly a kernel guru, but you might have to add
kern/new_write.c standard
to /sys/conf/files so the kernel build recognises it. I don't think
the kernel build process will automatically use everything it finds in
/sys/kern and other places.
--
Ben Smithurst
ben@scientia.demon.co.uk
send a blank message to ben+pgp@scientia.demon.co.uk for PGP key
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