// bit
		OpCtz8, OpCtz16, OpCtz32, OpCtz64,
		// mask
		OpSlicemask,
		// safety check
		OpIsNonNil,
		// not
		OpNot:
		return true
	case
		// add
		OpAdd64, OpAdd32, OpAdd16, OpAdd8,
		OpAdd32F, OpAdd64F,
		// sub
		OpSub64, OpSub32, OpSub16, OpSub8,
		OpSub32F, OpSub64F,
		// mul
		OpMul64, OpMul32, OpMul16, OpMul8,
		OpMul32F, OpMul64F,
		// div
		OpDiv32F, OpDiv64F,

		return true
	case OpAdd32withcarry:
		v.Op = Op386ADCL
		return true
	case OpAdd64F:
		v.Op = Op386ADDSD
		return true
	case OpAdd8:
		v.Op = Op386ADDL
		return true
	case OpAddPtr:
		v.Op = Op386ADDL
		return true
	case OpAddr:
		return rewriteValue386_OpAddr(v)
	case OpAnd16:
		v.Op = Op386ANDL
		return true
	case OpAnd32:
		v.Op = Op386ANDL
		return true

func hasRoutableIP(network string, ifi *net.Interface) (net.IP, bool) {
	ifat, err := ifi.Addrs()
	if err != nil {
		return nil, false
	}
	for _, ifa := range ifat {
		switch ifa := ifa.(type) {
		case *net.IPAddr:
			if ip, ok := routableIP(network, ifa.IP); ok {
				return ip, true
			}
		case *net.IPNet:
			if ip, ok := routableIP(network, ifa.IP); ok {
				return ip, true
			}
		}
	}
	return nil, false

// initialize the given closure's free variables. These correspond
// one-to-one with the variables in clo.Func.ClosureVars, and will be
// either an ONAME node (if the variable is captured by value) or an
// OADDR-of-ONAME node (if not).
func closureArgs(clo *ir.ClosureExpr) []ir.Node {
	fn := clo.Func

	args := make([]ir.Node, len(fn.ClosureVars))
	for i, v := range fn.ClosureVars {
		var outer ir.Node
		outer = v.Outer

	e.Off -= uint64(frag)
	e.Vaddr -= uint64(frag)
	e.Paddr -= uint64(frag)
	e.Filesz += uint64(frag)
	e.Memsz += uint64(frag)
}

func elf64phdr(out *OutBuf, e *ElfPhdr) {
	if e.Type == elf.PT_LOAD {
		fixElfPhdr(e)
	}

	out.Write32(uint32(e.Type))
	out.Write32(uint32(e.Flags))
	out.Write64(e.Off)
	out.Write64(e.Vaddr)
	out.Write64(e.Paddr)
	out.Write64(e.Filesz)
	out.Write64(e.Memsz)

			}
			wg.Wait()
		})
	}
}

func lookupSlowFast(ctx context.Context, fn func(context.Context, string, string) ([]IPAddr, error), network, host string) ([]IPAddr, error) {
	switch host {
	case "slow6loopback4":
		// Returns a slow IPv6 address, and a local IPv4 address.
		return []IPAddr{
			{IP: ParseIP(slowDst6)},
			{IP: ParseIP("127.0.0.1")},
		}, nil
	default:
		return fn(ctx, network, host)
	}
}

		}
	}
	return allErrs
}

// ValidateIPFromString validates ip address
func ValidateIPFromString(ipaddr string, fldPath *field.Path) field.ErrorList {
	allErrs := field.ErrorList{}
	if netutils.ParseIPSloppy(ipaddr) == nil {
		allErrs = append(allErrs, field.Invalid(fldPath, ipaddr, "ip address is not valid"))
	}
	return allErrs
}

// ValidatePort validates port numbers

				Off:    uint64(bo.Uint32(phdata[off+unsafe.Offsetof(ph.Off):])),
				Vaddr:  uint64(bo.Uint32(phdata[off+unsafe.Offsetof(ph.Vaddr):])),
				Paddr:  uint64(bo.Uint32(phdata[off+unsafe.Offsetof(ph.Paddr):])),
				Filesz: uint64(bo.Uint32(phdata[off+unsafe.Offsetof(ph.Filesz):])),
				Memsz:  uint64(bo.Uint32(phdata[off+unsafe.Offsetof(ph.Memsz):])),

		if runtime.GOOS == "windows" && interf.Flags&net.FlagUp == 0 {
			continue
		}

		for _, addr := range addrs {
			var ip net.IP
			switch v := addr.(type) {
			case *net.IPNet:
				ip = v.IP
			case *net.IPAddr:
				ip = v.IP
			}

			ipList = append(ipList, ip)
		}
	}

	return ipList
}

// mustGetLocalIP4 returns IPv4 addresses of localhost.  It panics on error.

		t.Fatalf("%s.  Unable to get IP addresses of this host.", err)
	}

	for _, addr := range addrs {
		var ip net.IP
		switch v := addr.(type) {
		case *net.IPNet:
			ip = v.IP
		case *net.IPAddr:
			ip = v.IP
		}

		if ip.To4() != nil {
			localIP4.Add(ip.String())
		}
	}

	// Filter ipList by IPs those do not start with '127.'.