}

func (a Aux) Sym() Sym { return a.l.resolve(a.r, a.Aux.Sym()) }

// oReader is a wrapper type of obj.Reader, along with some
// extra information.
type oReader struct {
	*goobj.Reader
	unit         *sym.CompilationUnit
	version      int // version of static symbol
	pkgprefix    string
	syms         []Sym    // Sym's global index, indexed by local index

	eof := f.Offset() + length
	start := f.Offset()
	c1 := bgetc(f)
	c2 := bgetc(f)
	c3 := bgetc(f)
	c4 := bgetc(f)
	f.MustSeek(start, 0)

	unit := &sym.CompilationUnit{Lib: lib}
	lib.Units = append(lib.Units, unit)

	magic := uint32(c1)<<24 | uint32(c2)<<16 | uint32(c3)<<8 | uint32(c4)
	if magic == 0x7f454c46 { // \x7F E L F