}

	// If we can block until Wait4 will succeed immediately, do so.
	ready, err := p.blockUntilWaitable()
	if err != nil {
		return nil, err
	}
	if ready {
		// Mark the process done now, before the call to Wait4,
		// so that Process.pidSignal will not send a signal.
		p.pidDeactivate(statusDone)
		// Acquire a write lock on sigMu to wait for any
		// active call to the signal method to complete.
		p.sigMu.Lock()

//go:cgo_import_dynamic libc_setuid setuid "libc.so"
//go:cgo_import_dynamic libc_setpgid setpgid "libc.so"
//go:cgo_import_dynamic libc_syscall syscall "libc.so"
//go:cgo_import_dynamic libc_wait4 wait4 "libc.so"
//go:cgo_import_dynamic libc_issetugid issetugid "libc.so"

//go:linkname libc_chdir libc_chdir
//go:linkname libc_chroot libc_chroot
//go:linkname libc_close libc_close
//go:linkname libc_execve libc_execve

	MOVD R8, ret+0(FP)
	RET

TEXT ·get_SetxattrAddr(SB), NOSPLIT|NOFRAME, $0-8
	MOVD $·Setxattr(SB), R8
	MOVD R8, ret+0(FP)
	RET

TEXT ·get_Wait4Addr(SB), NOSPLIT|NOFRAME, $0-8
	MOVD $·Wait4(SB), R8
	MOVD R8, ret+0(FP)
	RET

TEXT ·get_MountAddr(SB), NOSPLIT|NOFRAME, $0-8
	MOVD $·Mount(SB), R8
	MOVD R8, ret+0(FP)
	RET

TEXT ·get_UnmountAddr(SB), NOSPLIT|NOFRAME, $0-8
	MOVD $·Unmount(SB), R8

TEXT ·setuid(SB),NOSPLIT,$0
	JMP	runtime·syscall_setuid(SB)

TEXT ·setpgid(SB),NOSPLIT,$0
	JMP	runtime·syscall_setpgid(SB)

TEXT ·Syscall(SB),NOSPLIT,$0
	JMP	runtime·syscall_syscall(SB)

TEXT ·wait4(SB),NOSPLIT,$0
	JMP	runtime·syscall_wait4(SB)

TEXT ·write1(SB),NOSPLIT,$0

	}
	return Signal(w>>shift) & 0xFF
}

func (w WaitStatus) TrapCause() int { return -1 }

//sys	wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, err error)

func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) {
	var status _C_int
	wpid, err = wait4(pid, &status, options, rusage)
	if wstatus != nil {
		*wstatus = WaitStatus(status)
	}
	return
}

}

//sys	wait4(pid Pid_t, status *_C_int, options int, rusage *Rusage) (wpid Pid_t, err error)

func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) {
	var status _C_int
	var r Pid_t
	err = ERESTART
	// AIX wait4 may return with ERESTART errno, while the processus is still
	// active.
	for err == ERESTART {
		r, err = wait4(Pid_t(pid), &status, options, rusage)
	}

		if n == int(unsafe.Sizeof(err1)) {
			err = Errno(err1)
		}
		if err == nil {
			err = EPIPE
		}

		// Child failed; wait for it to exit, to make sure
		// the zombies don't accumulate.
		_, err1 := Wait4(pid, &wstatus, 0, nil)
		for err1 == EINTR {
			_, err1 = Wait4(pid, &wstatus, 0, nil)
		}
		return 0, err
	}

	// Read got EOF, so pipe closed on exec, so exec succeeded.
	return pid, nil
}

func ReadDirent(fd int, buf []byte) (n int, err error) {
	return getdirent(fd, buf)
}

//sys  wait4(pid _Pid_t, status *_C_int, options int, rusage *Rusage) (wpid _Pid_t, err error)

func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) {
	var status _C_int
	var r _Pid_t
	err = ERESTART
	// AIX wait4 may return with ERESTART errno, while the process is still
	// active.
	for err == ERESTART {

	return syscall.Signal(w>>shift) & 0xFF
}

func (w WaitStatus) TrapCause() int { return -1 }

//sys	wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, err error)

func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) {
	var status _C_int
	wpid, err = wait4(pid, &status, options, rusage)
	if wstatus != nil {
		*wstatus = WaitStatus(status)
	}
	return
}

	}
	return Signal(w>>shift) & 0xFF
}

func (w WaitStatus) TrapCause() int { return -1 }

func wait4(pid uintptr, wstatus *WaitStatus, options uintptr, rusage *Rusage) (wpid uintptr, err uintptr)

func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) {
	r0, e1 := wait4(uintptr(pid), wstatus, uintptr(options), rusage)
	if e1 != 0 {
		err = Errno(e1)
	}
	return int(r0), err
}