Symbol: sys_extpwritev
sys/kern/init_sysent.c
307
{ AS(extpwritev_args), 8, (sy_call_t *)sys_extpwritev }, /* 290 = extpwritev */
sys/sys/sysproto.h
1629
int sys_extpwritev (struct sysmsg *sysmsg, const struct extpwritev_args *);