sym, err := f.file.Symbols()
		if err != nil {
			return nil, err
		}
		f.sym = sym
	}
	var out []*driver.Sym
	for _, s := range f.sym {
		// Ignore a symbol with address 0 and size 0.
		// An ELF STT_FILE symbol will look like that.
		if s.Addr == 0 && s.Size == 0 {
			continue
		}
		if (r == nil || r.MatchString(s.Name)) && (addr == 0 || s.Addr <= addr && addr < s.Addr+uint64(s.Size)) {
			out = append(out, &driver.Sym{