TEXT ·clearErrno(SB), NOSPLIT, $0-0
	BL   addrerrno<>(SB)
	MOVD $0, 0(R3)
	RET

// Returns the address of errno in R3.
TEXT addrerrno<>(SB), NOSPLIT|NOFRAME, $0-0
	// Get library control area (LCA).
	MOVW PSALAA, R8
	MOVD LCA64(R8), R8

	// Get __errno FuncDesc.
	MOVD CAA(R8), R9
	MOVD EDCHPXV(R9), R9
	ADD  $(__errno), R9
	LMG  0(R9), R5, R6

	// Switch to saved LE stack.
	MOVD SAVSTACK_ASYNC(R8), R9
	MOVD 0(R9), R4

	}
	// __errno()
	errno := int(*(*int32)(unsafe.Pointer(runtime.CallLeFuncByPtr(runtime.XplinkLibvec+SYS___ERRNO<<4,
		[]uintptr{}))))
	// __errno2()
	errno2 := int(runtime.CallLeFuncByPtr(runtime.XplinkLibvec+SYS___ERRNO2<<4,
		[]uintptr{}))
	// strerror_r()
	ret = runtime.CallLeFuncByPtr(runtime.XplinkLibvec+SYS_STRERROR_R<<4,
		[]uintptr{uintptr(errno), uintptr(unsafe.Pointer(&buffer[0])), 1024})

	if v := unsafe.Sizeof(si); v != 128 {
		t.Fatalf("sizeof: got %d, want 128", v)
	}

	ofSigno := 0
	ofErrno := 4
	ofCode := 8
	if strings.HasPrefix(runtime.GOARCH, "mips") {
		// These two fields are swapped on MIPS platforms.
		ofErrno, ofCode = ofCode, ofErrno
	}
	ofPid := 12
	if host64bit {
		ofPid = 16
	}
	ofUid := ofPid + 4
	ofStatus := ofPid + 8

	offsets := []struct {

	var gerrno int
	var b []byte
	for l := nameinfoLen; l <= maxNameinfoLen; l *= 2 {
		b = make([]byte, l)
		gerrno, err = cgoNameinfoPTR(b, sa, salen)
		if gerrno == 0 || gerrno != _C_EAI_OVERFLOW {
			break
		}
	}
	if gerrno != 0 {
		switch gerrno {
		case _C_EAI_SYSTEM:
			if err == nil { // see golang.org/issue/6232

		if err != nil {
			// Display windows errno in error message.
			errno, ok := toErrno(err)
			if !ok {
				return "", err
			}
			return "", fmt.Errorf("%v (windows errno=%d)", err, errno)
		}
		defer c.Close()

		b := make([]byte, 100)
		n, err := c.Read(b)
		if err == nil || err == io.EOF {
			return string(b[:n]), nil
		}
		errno, ok := toErrno(err)

	# Assign return values.
	my $body = "";
	my @ret = ("_", "_", "_");
	my $do_errno = 0;
	for(my $i=0; $i<@out; $i++) {
		my $p = $out[$i];
		my ($name, $type) = parseparam($p);
		my $reg = "";
		if($name eq "err" && !$plan9) {
			$reg = "e1";
			$ret[2] = $reg;
			$do_errno = 1;
		} elsif($name eq "err" && $plan9) {
			$ret[0] = "r0";
			$ret[2] = "e1";
			next;
		} else {

	EBFONT          = syscall.Errno(0x3b)
	ECANCELED       = syscall.Errno(0x7d)
	ECHRNG          = syscall.Errno(0x2c)
	ECOMM           = syscall.Errno(0x46)
	ECONNABORTED    = syscall.Errno(0x67)
	ECONNREFUSED    = syscall.Errno(0x6f)
	ECONNRESET      = syscall.Errno(0x68)
	EDEADLK         = syscall.Errno(0x23)
	EDEADLOCK       = syscall.Errno(0x23)
	EDESTADDRREQ    = syscall.Errno(0x59)

	EBFONT          = syscall.Errno(0x3b)
	ECANCELED       = syscall.Errno(0x7d)
	ECHRNG          = syscall.Errno(0x2c)
	ECOMM           = syscall.Errno(0x46)
	ECONNABORTED    = syscall.Errno(0x67)
	ECONNREFUSED    = syscall.Errno(0x6f)
	ECONNRESET      = syscall.Errno(0x68)
	EDEADLK         = syscall.Errno(0x23)
	EDEADLOCK       = syscall.Errno(0x23)
	EDESTADDRREQ    = syscall.Errno(0x59)

	EBADRQC         = Errno(0x36)
	EBADSLT         = Errno(0x37)
	EBFONT          = Errno(0x39)
	EBUSY           = Errno(0x10)
	ECANCELED       = Errno(0x2f)
	ECHILD          = Errno(0xa)
	ECHRNG          = Errno(0x25)
	ECOMM           = Errno(0x46)
	ECONNABORTED    = Errno(0x82)
	ECONNREFUSED    = Errno(0x92)
	ECONNRESET      = Errno(0x83)
	EDEADLK         = Errno(0x2d)
	EDEADLOCK       = Errno(0x38)

func PidFDSendSignal(pidfd uintptr, s syscall.Signal) error {
	_, _, errno := syscall.Syscall(pidfdSendSignalTrap, pidfd, uintptr(s), 0)
	if errno != 0 {
		return errno
	}
	return nil
}

func PidFDOpen(pid, flags int) (uintptr, error) {
	pidfd, _, errno := syscall.Syscall(pidfdOpenTrap, uintptr(pid), uintptr(flags), 0)
	if errno != 0 {
		return ^uintptr(0), errno
	}
	return uintptr(pidfd), nil