offset := sect.Vaddr - Segtext.Vaddr + Segtext.Fileoff
		// Handle text sections with Codeblk
		if sect.Name == ".text" {
			writeParallel(&wg, f, ctxt, offset, sect.Vaddr, sect.Length)
		} else {
			writeParallel(&wg, datblk, ctxt, offset, sect.Vaddr, sect.Length)
		}
	}

	if Segrodata.Filelen > 0 {
		writeParallel(&wg, datblk, ctxt, Segrodata.Fileoff, Segrodata.Vaddr, Segrodata.Filelen)
	}

	}
	if addr == 0 || eaddr < addr {
		return nil
	}
	size := eaddr - addr
	data := make([]byte, size)
	for _, prog := range f.elf.Progs {
		if prog.Vaddr <= addr && addr+size-1 <= prog.Vaddr+prog.Filesz-1 {
			if _, err := prog.ReadAt(data, int64(addr-prog.Vaddr)); err != nil {
				return nil
			}
			return data
		}
	}
	return nil

type Segment struct {
	Rwx      uint8  // permission as usual unix bits (5 = r-x etc)
	Vaddr    uint64 // virtual address
	Length   uint64 // length in memory
	Fileoff  uint64 // file offset
	Filelen  uint64 // length on disk
	Sections []*Section
}

type Section struct {
	Rwx     uint8
	Extnum  int16
	Align   int32
	Name    string
	Vaddr   uint64
	Length  uint64
	Seg     *Segment
	Elfsect interface{} // an *ld.ElfShdr

}

type vdsoVersionKey struct {
	version string
	verHash uint32
}

type vdsoInfo struct {
	valid bool

	/* Load information */
	loadAddr   uintptr
	loadOffset uintptr /* loadAddr - recorded vaddr */

	/* Symbol table */
	symtab     *[vdsoSymTabSize]elfSym
	symstrings *[vdsoSymStringsSize]byte
	chain      []uint32
	bucket     []uint32
	symOff     uint32
	isGNUHash  bool

	/* Version table */