ptrace_args
{ .sy_narg = AS(ptrace_args), .sy_call = (sy_call_t *)sys_ptrace, .sy_auevent = AUE_PTRACE, .sy_flags = 0, .sy_thrcnt = SY_THR_STATIC }, /* 26 = ptrace */
sys_ptrace(struct thread *td, struct ptrace_args *uap)
struct ptrace_args *p = params;
int sys_ptrace(struct thread *, struct ptrace_args *);