You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: vdso.go
    path of file: ./repos/hubble-ui/backend/vendor/github.com/cilium/ebpf/internal
    
    the code of the file until where you have to start completion: package internal

import (
	"debug/elf"
	"encoding/binary"
	"errors"
	"fmt"
	"io"
	"math"
	"os"
	"unsafe"

	"github.com/cilium/ebpf/internal/unix"
)

var (
	errAuxvNoVDSO = errors.New("no vdso 
    
func vdsoMemoryAddress(r io.Reader, order binary.ByteOrder, uintptrIs32bits bool) (uintptr, error) {
	// See https://elixir.bootlin.com/linux/v6.5.5/source/include/uapi/linux/auxvec.h
	const (
		_AT_NULL         = 0  // End of vector
		_AT_SYSINFO_EHDR = 33 // Offset to vDSO blob in process image
	)

	// Loop through all tag/value pairs in auxv until we find `AT_SYSINFO_EHDR`,
	// the address of a page containing the virtual Dynamic Shared Object (vDSO).
	for {
		tag, value, err := readAuxvPair(r, order, uintptrIs32bits)
		if err != nil {
			return 0, err
		}

		switch tag {
		case _AT_SYSINFO_EHDR:
			if value != 0 {
				return uintptr(value), nil
			}
			return 0, fmt.Errorf("invalid vDSO address in auxv")
		// _AT_NULL is always the last tag/val pair in the aux vector
		// and can be treated like EOF.
		case _AT_NULL:
			return 0, errAuxvNoVDSO
		}
	}
}