var dupTrampoline = abi.FuncPCABI0(libc_dup2_trampoline)

type SockaddrDatalink struct {
	Len    uint8
	Family uint8
	Index  uint16
	Type   uint8
	Nlen   uint8
	Alen   uint8
	Slen   uint8
	Data   [12]int8
	raw    RawSockaddrDatalink
}

// Translate "kern.hostname" to []_C_int{0,1,2,3}.
func nametomib(name string) (mib []_C_int, err error) {
	const siz = unsafe.Sizeof(mib[0])

}

// Instruction layout.

const (
	FuncAlign = 4
	loopAlign = 16
)

type Optab struct {
	as    obj.As
	from1 uint8
	reg   uint8
	from3 uint8
	to1   uint8
	to2   uint8
	type_ int8
	size  int8
	param int16
	flag  uint8
}

const (
	NOTUSETMP = 1 << iota // p expands to multiple instructions, but does NOT use REGTMP

	// branchLoopHead marks loop entry.

	c.m = make(map[string]*Type)
	c.ptrs = make(map[string][]*Type)
	c.getTypeIDs = make(map[string]bool)
	c.incompleteStructs = make(map[string]bool)
	c.bool = c.Ident("bool")
	c.byte = c.Ident("byte")
	c.int8 = c.Ident("int8")
	c.int16 = c.Ident("int16")
	c.int32 = c.Ident("int32")
	c.int64 = c.Ident("int64")
	c.uint8 = c.Ident("uint8")
	c.uint16 = c.Ident("uint16")
	c.uint32 = c.Ident("uint32")

	case uint8:
		return Uint64Value(uint64(v))
	case uint16:
		return Uint64Value(uint64(v))
	case uint32:
		return Uint64Value(uint64(v))
	case uintptr:
		return Uint64Value(uint64(v))
	case int8:
		return Int64Value(int64(v))
	case int16:
		return Int64Value(int64(v))
	case int32:
		return Int64Value(int64(v))
	case float64:
		return Float64Value(v)
	case float32:

// It panics if n <= 0.
func N[Int intType](n Int) Int {
	if n <= 0 {
		panic("invalid argument to N")
	}
	return Int(globalRand.uint64n(uint64(n)))
}

type intType interface {
	~int | ~int8 | ~int16 | ~int32 | ~int64 |
		~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 | ~uintptr
}

// Float64 returns, as a float64, a pseudo-random number in the half-open interval [0.0,1.0)
// from the default Source.

	copy([ /* ERROR "copy expects slice arguments" */ ...]int{}, []int{})
	copy([ /* ERROR "copy expects slice arguments" */ ]int{}, [...]int{})
	copy([ /* ERROR "different element types" */ ]int8{}, "foo")

	// spec examples
	var a = [...]int{0, 1, 2, 3, 4, 5, 6, 7}
	var s = make([]int, 6)
	var b = make([]byte, 5)
	n1 := copy(s, a[0:])            // n1 == 6, s == []int{0, 1, 2, 3, 4, 5}

	Addr     [16]byte /* in6_addr */
	Scope_id uint32
	Conn_id  uint32
}

type RawSockaddrIUCV struct {
	Family  uint16
	Port    uint16
	Addr    uint32
	Nodeid  [8]int8
	User_id [8]int8
	Name    [8]int8
}

type RawSockaddrNFC struct {
	Sa_family    uint16
	Dev_idx      uint32
	Target_idx   uint32
	Nfc_protocol uint32
}

type _Socklen uint32

type Linger struct {

//
// Returns whether the assignment succeeded.
func (p *abiDesc) tryRegAssignArg(t *_type, offset uintptr) bool {
	switch k := t.Kind_ & abi.KindMask; k {
	case abi.Bool, abi.Int, abi.Int8, abi.Int16, abi.Int32, abi.Uint, abi.Uint8, abi.Uint16, abi.Uint32, abi.Uintptr, abi.Pointer, abi.UnsafePointer:
		// Assign a register for all these types.
		return p.assignReg(t.Size_, offset)
	case abi.Int64, abi.Uint64:

	}
	if atomic.Xchg64(&test_z64, (3<<40)+3) != (2<<40)+2 {
		throw("xchg64 failed")
	}
	if atomic.Load64(&test_z64) != (3<<40)+3 {
		throw("xchg64 failed")
	}
}

func check() {
	var (
		a     int8
		b     uint8
		c     int16
		d     uint16
		e     int32
		f     uint32
		g     int64
		h     uint64
		i, i1 float32
		j, j1 float64
		k     unsafe.Pointer
		l     *uint16

		truth = val.Bool()
	case reflect.Complex64, reflect.Complex128:
		truth = val.Complex() != 0
	case reflect.Chan, reflect.Func, reflect.Pointer, reflect.Interface:
		truth = !val.IsNil()
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		truth = val.Int() != 0
	case reflect.Float32, reflect.Float64:
		truth = val.Float() != 0