return start - loadSegment.Vaddr, nil
		}

		return 0, fmt.Errorf("don't know how to handle EXEC segment: %v start=0x%x limit=0x%x offset=0x%x", *loadSegment, start, limit, offset)
	case elf.ET_REL:
		if offset != 0 {
			return 0, fmt.Errorf("don't know how to handle mapping.Offset")
		}
		return start, nil
	case elf.ET_DYN:
		// The process mapping information, start = start of virtual address range,

	}

	elfobj.is64 = is64

	if v := uint32(hdrbuf[elf.EI_VERSION]); v != elfobj.version {
		return errorf("malformed elf version: got %d, want %d", v, elfobj.version)
	}

	if elf.Type(elfobj.type_) != elf.ET_REL {
		return errorf("elf but not elf relocatable object")
	}

	mach := elf.Machine(elfobj.machine)
	switch arch.Family {
	default:
		return errorf("elf %s unimplemented", arch.Name)

	case sys.MIPS: