if r0 != 0 {
		regerrno = syscall.Errno(r0)
	}
	return
}

func regDeleteKey(key syscall.Handle, subkey *uint16) (regerrno error) {
	r0, _, _ := syscall.Syscall(procRegDeleteKeyW.Addr(), 2, uintptr(key), uintptr(unsafe.Pointer(subkey)), 0)
	if r0 != 0 {
		regerrno = syscall.Errno(r0)
	}
	return
}

func regDeleteValue(key syscall.Handle, name *uint16) (regerrno error) {

		filetype syscall.Filetype
		network  string
		error    error
	}{
		{syscall.FILETYPE_SOCKET_STREAM, "tcp", nil},
		{syscall.FILETYPE_SOCKET_DGRAM, "", syscall.EOPNOTSUPP},
		{syscall.FILETYPE_BLOCK_DEVICE, "", syscall.ENOTSOCK},
		{syscall.FILETYPE_CHARACTER_DEVICE, "", syscall.ENOTSOCK},
		{syscall.FILETYPE_DIRECTORY, "", syscall.ENOTSOCK},
		{syscall.FILETYPE_REGULAR_FILE, "", syscall.ENOTSOCK},

// license that can be found in the LICENSE file.

//go:build unix || js || wasip1 || windows

package net

import (
	"context"
	"syscall"
)

func sockaddrToIP(sa syscall.Sockaddr) Addr {
	switch sa := sa.(type) {
	case *syscall.SockaddrInet4:
		return &IPAddr{IP: sa.Addr[0:]}
	case *syscall.SockaddrInet6:
		return &IPAddr{IP: sa.Addr[0:], Zone: zoneCache.name(int(sa.ZoneId))}
	}
	return nil
}

package poll

import (
	"io"
	"syscall"
)

// SendFile wraps the TransmitFile call.
func SendFile(fd *FD, src syscall.Handle, n int64) (written int64, err error) {
	defer func() {
		TestHookDidSendFile(fd, 0, written, err, written > 0)
	}()
	if fd.kind == kindPipe {
		// TransmitFile does not work with pipes
		return 0, syscall.ESPIPE
	}
	if ft, _ := syscall.GetFileType(src); ft == syscall.FILE_TYPE_PIPE {

package sha1_test

import (
	"crypto/sha1"
	"syscall"
	"testing"
)

func TestOutOfBoundsRead(t *testing.T) {
	const pageSize = 4 << 10
	data, err := syscall.Mmap(0, 0, 2*pageSize, syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_ANON|syscall.MAP_PRIVATE)
	if err != nil {
		panic(err)
	}
	if err := syscall.Mprotect(data[pageSize:], syscall.PROT_NONE); err != nil {
		panic(err)
	}

package os

import (
	"syscall"
	"time"
)

const bitSize16 = 2

func fileInfoFromStat(d *syscall.Dir) *fileStat {
	fs := &fileStat{
		name:    d.Name,
		size:    d.Length,
		modTime: time.Unix(int64(d.Mtime), 0),
		sys:     d,
	}
	fs.mode = FileMode(d.Mode & 0777)
	if d.Mode&syscall.DMDIR != 0 {
		fs.mode |= ModeDir
	}
	if d.Mode&syscall.DMAPPEND != 0 {
		fs.mode |= ModeAppend
	}

	return 8, map[int]*wireFormat{
		syscall.RTM_ADD:        rtm,
		syscall.RTM_DELETE:     rtm,
		syscall.RTM_CHANGE:     rtm,
		syscall.RTM_GET:        rtm,
		syscall.RTM_LOSING:     rtm,
		syscall.RTM_REDIRECT:   rtm,
		syscall.RTM_MISS:       rtm,
		syscall.RTM_LOCK:       rtm,
		syscall.RTM_RESOLVE:    rtm,
		syscall.RTM_NEWADDR:    ifam,
		syscall.RTM_DELADDR:    ifam,
		syscall.RTM_IFANNOUNCE: ifanm,

package net

import (
	"os"
	"syscall"
)

func setDefaultSockopts(s syscall.Handle, family, sotype int, ipv6only bool) error {
	if family == syscall.AF_INET6 && sotype != syscall.SOCK_RAW {
		// Allow both IP versions even if the OS default
		// is otherwise. Note that some operating systems
		// never admit this option.
		syscall.SetsockoptInt(s, syscall.IPPROTO_IPV6, syscall.IPV6_V6ONLY, boolint(ipv6only))
	}

		// area.
		if err != syscall.ENOTSUP && err != syscall.EPERM && err != errNoFallocate {
			return err
		}
	}
	err = out.f.Truncate(int64(filesize))
	if err != nil {
		Exitf("resize output file failed: %v", err)
	}
	out.buf, err = syscall.Mmap(int(out.f.Fd()), 0, int(filesize), syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_SHARED|syscall.MAP_FILE)
	if err != nil {
		return err
	}

	// skipping the test altogether.
	if runtime.GOOS != "wasip1" {
		syscall.Kill(syscall.Getpid(), syscall.SIGCHLD)
	}
}

func open(name string) (uintptr, error) {
	fd, err := syscall.Open(name, syscall.O_RDONLY, 0)
	if err != nil {
		return 0, err
	}
	return uintptr(fd), nil
}

func read(fd uintptr, buf []byte) (int, error) {
	return syscall.Read(int(fd), buf)
}

func closefd(fd uintptr) {