MOVW	nch+16(FP), A2
	MOV	ev+24(FP), A3
	MOVW	nev+32(FP), A4
	MOV	ts+40(FP), A5
	MOV	$SYS_kevent, T0
	ECALL
	BEQ	T0, ZERO, ok
	NEG	A0, A0
ok:
	MOVW	A0, ret+48(FP)
	RET

// func fcntl(fd, cmd, arg int32) (int32, int32)
TEXT runtime·fcntl(SB),NOSPLIT,$0
	MOVW	fd+0(FP), A0
	MOVW	cmd+4(FP), A1
	MOVW	arg+8(FP), A2
	MOV	$SYS_fcntl, T0
	ECALL
	BEQ	T0, ZERO, noerr
	MOV	$-1, A1

	MOVV	ts+40(FP), R9		// arg 6 - timeout
	MOVV	$72, R2			// sys_kevent
	SYSCALL
	BEQ	R7, 2(PC)
	SUBVU	R2, R0, R2	// caller expects negative errno
	MOVW	R2, ret+48(FP)
	RET

// func fcntl(fd, cmd, arg int32) (int32, int32)
TEXT runtime·fcntl(SB),NOSPLIT,$0
	MOVW	fd+0(FP), R4	// fd
	MOVW	cmd+4(FP), R5	// cmd
	MOVW	arg+8(FP), R6	// arg
	MOVV	$92, R2		// sys_fcntl
	SYSCALL
	MOVV	$0, R4

#include <net/route.h>
#include <netinet/in.h>
#include <termios.h>
#include <netinet/ip.h>
#include <netinet/ip_mroute.h>
'

includes='
#include <sys/types.h>
#include <sys/file.h>
#include <fcntl.h>
#include <dirent.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <errno.h>
#include <sys/signal.h>

	MOVW	nch+16(FP), R2
	MOVD	ev+24(FP), R3
	MOVW	nev+32(FP), R4
	MOVD	ts+40(FP), R5
	MOVD	$SYS_kevent, R8
	SVC
	BCC	ok
	NEG	R0, R0
ok:
	MOVW	R0, ret+48(FP)
	RET

// func fcntl(fd, cmd, arg int32) (int32, int32)
TEXT runtime·fcntl(SB),NOSPLIT,$0
	MOVW	fd+0(FP), R0
	MOVW	cmd+4(FP), R1
	MOVW	arg+8(FP), R2
	MOVD	$SYS_fcntl, R8
	SVC
	BCC	noerr
	MOVW	$-1, R1
	MOVW	R1, ret+16(FP)

	MOVW ev+12(FP), R3	// eventlist
	ADD $20, R13	// pass arg 5 and 6 on stack
	MOVW $SYS_kevent, R7
	SWI $0
	RSB.CS $0, R0
	SUB $20, R13
	MOVW	R0, ret+24(FP)
	RET

// func fcntl(fd, cmd, arg int32) (int32, int32)
TEXT runtime·fcntl(SB),NOSPLIT,$0
	MOVW fd+0(FP), R0	// fd
	MOVW cmd+4(FP), R1	// cmd
	MOVW arg+8(FP), R2	// arg
	MOVW $SYS_fcntl, R7
	SWI $0
	MOVW $0, R1
	MOVW.CS R0, R1

	MOVW R4, 4(R13)
	MOVW ts+20(FP), R4	// timeout
	MOVW R4, 8(R13)
	ADD $4, R13	// pass arg 5 and 6 on stack
	SWI $SYS___kevent50
	RSB.CS $0, R0
	SUB $4, R13
	MOVW	R0, ret+24(FP)
	RET

// func fcntl(fd, cmd, args int32) int32
TEXT runtime·fcntl(SB),NOSPLIT,$0
	MOVW fd+0(FP), R0
	MOVW cmd+4(FP), R1
	MOVW arg+8(FP), R2
	SWI $SYS_fcntl
	MOVW $0, R1
	MOVW.CS R0, R1
	MOVW.CS $-1, R0

func pipe2(flags int32) (r, w int32, errno int32) {
	var p [2]int32
	_, e := sysvicall2Err(&libc_pipe2, uintptr(noescape(unsafe.Pointer(&p))), uintptr(flags))
	return p[0], p[1], int32(e)
}

//go:nosplit
func fcntl(fd, cmd, arg int32) (ret int32, errno int32) {
	r1, err := sysvicall3Err(&libc_fcntl, uintptr(fd), uintptr(cmd), uintptr(arg))
	return int32(r1), int32(err)
}

func osyield1()

//go:nosplit

func Futimes(fd int, tv []Timeval) (err error) {
	if len(tv) != 2 {
		return EINVAL
	}
	return futimes(fd, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
}

//sys	fcntl(fd int, cmd int, arg int) (val int, err error)
//sys	fcntlPtr(fd int, cmd int, arg unsafe.Pointer) (val int, err error) = SYS_FCNTL
//sysnb ioctl(fd int, req int, arg int) (err error)

	SYS_GETDTABLESIZE            = 89  // { int getdtablesize(void); }
	SYS_DUP2                     = 90  // { int dup2(u_int from, u_int to); }
	SYS_FCNTL                    = 92  // { int fcntl(int fd, int cmd, long arg); }
	SYS_SELECT                   = 93  // { int select(int nd, fd_set *in, fd_set *ou, \
	SYS_FSYNC                    = 95  // { int fsync(int fd); }

	return
}

var ioSync int64

func CloseOnExec(fd int) { fcntl(fd, F_SETFD, FD_CLOEXEC) }

func SetNonblock(fd int, nonblocking bool) (err error) {
	flag, err := fcntl(fd, F_GETFL, 0)
	if err != nil {
		return err
	}
	if nonblocking {
		flag |= O_NONBLOCK
	} else {
		flag &= ^O_NONBLOCK
	}
	_, err = fcntl(fd, F_SETFL, flag)
	return err
}