// Open opens the named file.
// The caller must call f.Close when the file is no longer needed.
func Open(name string) (*File, error) {
	r, err := os.Open(name)
	if err != nil {
		return nil, err
	}
	if f, err := openGoFile(r); err == nil {
		return f, nil
	} else if _, ok := err.(archive.ErrGoObjOtherVersion); ok {
		return nil, fmt.Errorf("open %s: %v", name, err)
	}
	for _, try := range openers {
		if raw, err := try(r); err == nil {

	"debug/dwarf"
	"debug/gosym"
	"errors"
	"fmt"
	"io"
	"os"
)

type goobjFile struct {
	goobj *archive.GoObj
	r     *goobj.Reader
	f     *os.File
	arch  *sys.Arch
}

func openGoFile(f *os.File) (*File, error) {
	a, err := archive.Parse(f, false)
	if err != nil {
		return nil, err
	}
	entries := make([]*Entry, 0, len(a.Entries))
L:
	for _, e := range a.Entries {
		switch e.Type {