extern int64_t dtrace_systrace_syscall(uintptr_t arg0, uintptr_t arg1,
uintptr_t arg2, uintptr_t arg3, uintptr_t arg4, uintptr_t arg5);
#else
extern void (*systrace_probe)(dtrace_id_t, uint64_t, uint64_t,
extern int64_t dtrace_systrace_syscall(uintptr_t arg0, uintptr_t arg1,
uintptr_t arg2, uintptr_t arg3, uintptr_t arg4, uintptr_t arg5);
#else
extern void (*systrace_probe)(dtrace_id_t, uint64_t, uint64_t,