Question about FreeBSD syscall usage

[Yan, Yeqing]

Hi:
I'm from Intel China. Our project use FreeBSD 7.0 and I have some questions about the FreeBSD syscall.
I don't know how to use these syscall below.
Is there having some doc or example about how to use these syscall?

kse_exit
kse_wakeup
kse_create
kse_thr_interrupt
kse_release
kse_switchin

mac_syscall

thr_create
thr_suspend
thr_kill2

Thank you very much!

Best Regards
Yan, Yeqing