func commentText(g *ast.CommentGroup) string {
	var pieces []string
	for _, com := range g.List {
		c := com.Text
		// Remove comment markers.
		// The parser has given us exactly the comment text.
		switch c[1] {
		case '/':
			//-style comment (no newline at the end)
			c = c[2:] + "\n"
		case '*':
			/*-style comment */
			c = c[2 : len(c)-2]
		}

		offset = 0
	}
	return time.FixedZone("", int(offset/time.Second))
}

// msDosTimeToTime converts an MS-DOS date and time into a time.Time.
// The resolution is 2s.
// See: https://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-dosdatetimetofiletime
func msDosTimeToTime(dosDate, dosTime uint16) time.Time {
	return time.Date(
		// date bits 0-4: day of month; 5-8: month; 9-15: years since 1980

		return nil, 0, ErrFormat
	}

	// If the directory end data tells us to use a non-zero baseOffset,
	// but we would find a valid directory entry if we assume that the
	// baseOffset is 0, then just use a baseOffset of 0.
	// We've seen files in which the directory end data gives us
	// an incorrect baseOffset.
	if baseOffset > 0 {
		off := int64(d.directoryOffset)

	instructions["BL"] = obj.ACALL
	// MCR differs from MRC by the way fields of the word are encoded.
	// (Details in arm.go). Here we add the instruction so parse will find
	// it, but give it an opcode number known only to us.
	instructions["MCR"] = aMCR

	return &Arch{
		LinkArch:       &arm.Linkarm,
		Instructions:   instructions,
		Register:       register,
		RegisterPrefix: registerPrefix,
		RegisterNumber: armRegisterNumber,

				p.errorf("misplaced //go:build comment")
			}
			continue
		}
		if tok != '\n' {
			p.sawCode = true
		}
		if tok == '#' {
			// A leftover wisp of a #include/#define/etc,
			// to let us know that p.sawCode should be true now.
			// Otherwise ignored.
			continue
		}
		return tok
	}
}

// line consumes a single assembly line from p.lex of the form
//

	buf.Reset()
	doCR := lineNum%5 == 0
	if doCR {
		n--
	}
	for i := 0; i < n-1; i++ { // Stop early for \n.
		c := 'a' + byte(lineNum+i)
		if c == '\n' || c == '\r' { // Don't confuse us.
			c = 'N'
		}
		buf.WriteByte(c)
	}
	if addNewline {
		if doCR {
			buf.WriteByte('\r')
		}
		buf.WriteByte('\n')
	}
}

	if err != nil {
		return fmt.Errorf("mountDevImage: failed to parse mount information: %v", err)
	}
	if dict["ImagePresent"] == "true" && dict["Status"] == "Complete" {
		return nil
	}
	// Some devices only give us an ImageSignature key.
	if _, exists := dict["ImageSignature"]; exists {
		return nil
	}
	// No image is mounted. Find a suitable image.
	imgPath, err := findDevImage()
	if err != nil {
		return err
	}