size := C._goboringcrypto_ECDSA_size(priv.key)
	sig := make([]byte, size)
	var sigLen C.uint
	if C._goboringcrypto_ECDSA_sign(0, base(hash), C.size_t(len(hash)), base(sig), &sigLen, priv.key) == 0 {
		return nil, fail("ECDSA_sign")
	}
	runtime.KeepAlive(priv)
	return sig[:sigLen], nil
}

func VerifyECDSA(pub *PublicKeyECDSA, hash []byte, sig []byte) bool {

package syscall

// Round the length of a raw sockaddr up to align it properly.
func cmsgAlignOf(salen int) int {
	salign := sizeofPtr
	if sizeofPtr == 8 && !supportsABI(_dragonflyABIChangeVersion) {
		// 64-bit Dragonfly before the September 2019 ABI changes still requires
		// 32-bit aligned access to network subsystem.
		salign = 4
	}
	return (salen + salign - 1) & ^(salign - 1)

	var ptr unsafe.Pointer
	var salen _Socklen
	if to != nil {
		ptr, salen, err = to.sockaddr()
		if err != nil {
			return 0, err
		}
	}
	return sendmsgN(fd, p, oob, ptr, salen, flags)
}

func sendmsgNInet4(fd int, p, oob []byte, to *SockaddrInet4, flags int) (n int, err error) {
	ptr, salen, err := to.sockaddr()
	if err != nil {
		return 0, err
	}

//go:build aix || darwin || freebsd || linux || netbsd || openbsd || solaris

package syscall

import (
	"runtime"
)

// Round the length of a raw sockaddr up to align it properly.
func cmsgAlignOf(salen int) int {
	salign := sizeofPtr

	// dragonfly needs to check ABI version at runtime, see cmsgAlignOf in
	// sockcmsg_dragonfly.go
	switch runtime.GOOS {
	case "aix":
		// There is no alignment on AIX.
		salign = 1

	BR	indexbytebody<>(SB)

TEXT ·IndexByteString(SB),NOSPLIT|NOFRAME,$0-32
	MOVD	s_base+0(FP), R3// s_base => R3
	MOVD	s_len+8(FP), R4 // s_len => R4
	MOVBZ	c+16(FP), R5    // c => R5
	MOVD	$ret+24(FP), R2 // &ret => R9
	BR	indexbytebody<>(SB)

// input:
// R3: s
// R4: s_len
// R5: c -- byte sought
// R2: &ret -- address to put index into
TEXT indexbytebody<>(SB),NOSPLIT|NOFRAME,$0
	CMPBEQ	R4, $0, notfound

//go:build aix || darwin || freebsd || linux || netbsd || openbsd || solaris || zos

package unix

import (
	"runtime"
)

// Round the length of a raw sockaddr up to align it properly.
func cmsgAlignOf(salen int) int {
	salign := SizeofPtr

	// dragonfly needs to check ABI version at runtime, see cmsgAlignOf in
	// sockcmsg_dragonfly.go
	switch runtime.GOOS {
	case "aix":
		// There is no alignment on AIX.
		salign = 1

//
// Windows has a limit of 32 KB. To be conservative and not worry about whether
// that includes spaces or not, just use 30 KB. Darwin's limit is less clear.
// The OS claims 256KB, but we've seen failures with arglen as small as 50KB.

// authentication.
func UnixCredentials(ucred *Ucred) []byte {
	b := make([]byte, CmsgSpace(SizeofUcred))
	h := (*Cmsghdr)(unsafe.Pointer(&b[0]))
	h.Level = SOL_SOCKET
	h.Type = SCM_CREDENTIALS
	h.SetLen(CmsgLen(SizeofUcred))
	*(*Ucred)(h.data(0)) = *ucred
	return b
}

// ParseUnixCredentials decodes a socket control message that contains
// credentials in a Ucred structure. To receive such a message, the

	// makeFuncImpl contains a stack map for use by the runtime
	_, _, abid := funcLayout(ftyp, nil)

	impl := &makeFuncImpl{
		makeFuncCtxt: makeFuncCtxt{
			fn:      code,
			stack:   abid.stackPtrs,
			argLen:  abid.stackCallArgsSize,
			regPtrs: abid.inRegPtrs,
		},
		ftyp: ftyp,
		fn:   fn,
	}

	return Value{t, unsafe.Pointer(impl), flag(Func)}
}

		t.Skipf("skipping test: GOARCH=%s", runtime.GOARCH)
	}

	for arglen := 0; arglen <= runtime.MaxArgs; arglen++ {
		arglen := arglen
		t.Run(fmt.Sprintf("arg-%d", arglen), func(t *testing.T) {
			t.Parallel()
			args := make([]string, arglen)
			rets := make([]string, arglen+1)
			params := make([]uintptr, arglen)
			for i := range args {
				args[i] = fmt.Sprintf("int a%d", i)