if sect != nil {
			bits := ptrdata / int64(ctxt.Arch.PtrSize)
			r := make([]byte, (bits+7)/8)
			// ldshlibsyms avoids closing the ELF file so sect.ReadAt works.
			// If we remove this read (and the ones in decodetypeGcprog), we
			// can close the file.
			_, err := sect.ReadAt(r, int64(addr-sect.Addr))
			if err != nil {
				log.Fatal(err)
			}
			return r
		}

	}

	f, err := elf.Open(libpath)
	if err != nil {
		Errorf(nil, "cannot open shared library: %s", libpath)
		return
	}
	// Keep the file open as decodetypeGcprog needs to read from it.
	// TODO: fix. Maybe mmap the file.
	//defer f.Close()

	hash, err := readnote(f, ELF_NOTE_GO_NAME, ELF_NOTE_GOABIHASH_TAG)
	if err != nil {

		for i := int64(0); i < nptr; i++ {
			if (mask[i/8]>>uint(i%8))&1 != 0 {
				p.w.Ptr(sval/ptrsize + i)
			}
		}
		return
	}

	// Copy program.
	prog := decodetypeGcprog(p.ctxt, typ)
	p.w.ZeroUntil(sval / ptrsize)
	p.w.Append(prog[4:], nptr)
}

// cutoff is the maximum data section size permitted by the linker
// (see issue #9862).