pwrite_args
{ .sy_narg = AS(pwrite_args), .sy_call = (sy_call_t *)sys_pwrite, .sy_auevent = AUE_PWRITE, .sy_flags = SYF_CAPENABLED, .sy_thrcnt = SY_THR_STATIC }, /* 476 = pwrite */
sys_pwrite(struct thread *td, struct pwrite_args *uap)
struct pwrite_args *p = params;
int sys_pwrite(struct thread *, struct pwrite_args *);