func (r *RegArgs) IntRegArgAddr(reg int, argSize uintptr) unsafe.Pointer {
	if argSize > goarch.PtrSize || argSize == 0 || argSize&(argSize-1) != 0 {
		panic("invalid argSize")
	}
	offset := uintptr(0)
	if goarch.BigEndian {
		offset = goarch.PtrSize - argSize
	}
	return unsafe.Pointer(uintptr(unsafe.Pointer(&r.Ints[reg])) + offset)
}

// IntArgRegBitmap is a bitmap large enough to hold one bit per
// integer argument/return register.

	}

	switch h.Size() {
	case 4:
		sum32 := h.(hash.Hash32).Sum32()
		if sum32 != binary.BigEndian.Uint32(sum) {
			t.Fatalf("Sum()=0x%x, but Sum32()=0x%x", sum, sum32)
		}
	case 8:
		sum64 := h.(hash.Hash64).Sum64()
		if sum64 != binary.BigEndian.Uint64(sum) {
			t.Fatalf("Sum()=0x%x, but Sum64()=0x%x", sum, sum64)
		}
	case 16:

//
// This package is supposed to be used by the net package of standard
// library. Therefore the package set used in the package must be the
// same as net package.

var (
	littleEndian binaryLittleEndian
	bigEndian    binaryBigEndian
)

type binaryByteOrder interface {
	Uint16([]byte) uint16
	Uint32([]byte) uint32
	PutUint16([]byte, uint16)
	PutUint32([]byte, uint32)
	Uint64([]byte) uint64
}

// readInt returns the size-bytes unsigned integer in native byte order at offset off.
func readInt(b []byte, off, size uintptr) (u uint64, ok bool) {
	if len(b) < int(off+size) {
		return 0, false
	}
	if goarch.BigEndian {
		return readIntBE(b[off:], size), true
	}
	return readIntLE(b[off:], size), true
}

func readIntBE(b []byte, size uintptr) uint64 {
	switch size {
	case 1:
		return uint64(b[0])
	case 2:

	"386":     binary.LittleEndian,
	"amd64":   binary.LittleEndian,
	"arm":     binary.LittleEndian,
	"arm64":   binary.LittleEndian,
	"ppc64":   binary.BigEndian,
	"ppc64le": binary.LittleEndian,
	"s390x":   binary.BigEndian,
}

type Liner interface {
	// Given a pc, returns the corresponding file, line, and function data.
	// If unknown, returns "",0,nil.

	var ident [4]byte
	if _, err := r.ReadAt(ident[0:], 0); err != nil {
		return nil, err
	}
	be := binary.BigEndian.Uint32(ident[0:])
	le := binary.LittleEndian.Uint32(ident[0:])
	switch Magic32 &^ 1 {
	case be &^ 1:
		f.ByteOrder = binary.BigEndian
		f.Magic = be
	case le &^ 1:
		f.ByteOrder = binary.LittleEndian
		f.Magic = le
	default:

	a := b.bytes(2)
	if a == nil {
		return 0
	}
	return b.order.Uint16(a)
}

func (b *buf) uint24() uint32 {
	a := b.bytes(3)
	if a == nil {
		return 0
	}
	if b.dwarf.bigEndian {
		return uint32(a[2]) | uint32(a[1])<<8 | uint32(a[0])<<16
	} else {
		return uint32(a[0]) | uint32(a[1])<<8 | uint32(a[2])<<16
	}
}

func (b *buf) uint32() uint32 {
	a := b.bytes(4)
	if a == nil {

	if t.HeadType == objabi.Hunknown {
		panic("HeadType is not set")
	}
}

//
// MISC
//

func (t *Target) IsBigEndian() bool {
	return t.Arch.ByteOrder == binary.BigEndian
}

func (t *Target) UsesLibc() bool {
	t.mustSetHeadType()
	switch t.HeadType {
	case objabi.Haix, objabi.Hdarwin, objabi.Hopenbsd, objabi.Hsolaris, objabi.Hwindows:

				t.Errorf("error %q should contain math/rand", errStr)
			}
		}
	}
}

// Test the code to look up packages when given two args. First test case is
//
//	go doc binary BigEndian
//
// This needs to find encoding/binary.BigEndian, which means
// finding the package encoding/binary given only "binary".
// Second case is
//
//	go doc rand Float64
//

func keyHash(name string, key []byte) uint32 {
	h := sha256.New()
	h.Write([]byte(name))
	h.Write([]byte("\n"))
	h.Write(key)
	sum := h.Sum(nil)
	return binary.BigEndian.Uint32(sum)
}

var (
	errVerifierID   = errors.New("malformed verifier id")
	errVerifierAlg  = errors.New("unknown verifier algorithm")
	errVerifierHash = errors.New("invalid verifier hash")
)