Date: Sun, 21 Feb 1999 12:40:06 -0600 (CST) From: Gurudatt Shenoy <gurudatt@cs.tamu.edu> To: freebsd-questions@freebsd.org Subject: Question: Adding a new system call Message-ID: <Pine.GSO.3.96.990221122904.10095A-100000@dilbert>
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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
Do I have to declare an extern function prototype in some header file too?
I appreciate your feedback.
Thanks,
Guru
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