in  IPNet
	out IPNet
}{
	{IPNet{IP: v4addr, Mask: v4mask}, IPNet{IP: v4addr, Mask: v4mask}},
	{IPNet{IP: v4addr, Mask: v4mappedv6mask}, IPNet{IP: v4addr, Mask: v4mask}},
	{IPNet{IP: v4mappedv6addr, Mask: v4mappedv6mask}, IPNet{IP: v4addr, Mask: v4mask}},
	{IPNet{IP: v4mappedv6addr, Mask: v6mask}, IPNet{IP: v4addr, Mask: v4maskzero}},
	{IPNet{IP: v4addr, Mask: v6mask}, IPNet{IP: v4addr, Mask: v4maskzero}},

		},
		{
			name:          "private v6 mapped v4Addr 10/8",
			ip:            private6mapped4a,
			globalUnicast: true,
			private:       true,
		},
		{
			name:          "private v6 mapped v4Addr 172.16/12",
			ip:            private6mapped4b,
			globalUnicast: true,
			private:       true,
		},
		{
			name:          "private v6 mapped v4Addr 192.168/16",
			ip:            private6mapped4c,

		// address where the first byte of the segment is loaded
		// (loadSegment.Vaddr). A file offset fx maps to a virtual (symbol) address
		// sx = fx - loadSegment.Off + loadSegment.Vaddr.
		//
		// Thus, a runtime virtual address x maps to a symbol address
		// sx = x - start + offset - loadSegment.Off + loadSegment.Vaddr.
		return start - offset + loadSegment.Off - loadSegment.Vaddr, nil
	}

	ctxt.xdefine("runtime.noptrdata", sym.SNOPTRDATA, int64(noptr.Vaddr))
	ctxt.xdefine("runtime.enoptrdata", sym.SNOPTRDATA, int64(noptr.Vaddr+noptr.Length))
	ctxt.xdefine("runtime.bss", sym.SBSS, int64(bss.Vaddr))
	ctxt.xdefine("runtime.ebss", sym.SBSS, int64(bss.Vaddr+bss.Length))
	ctxt.xdefine("runtime.data", sym.SDATA, int64(data.Vaddr))

		msect.align++
	}
	msect.addr = sect.Vaddr
	msect.size = sect.Length

	if sect.Vaddr < sect.Seg.Vaddr+sect.Seg.Filelen {
		// data in file
		if sect.Length > sect.Seg.Vaddr+sect.Seg.Filelen-sect.Vaddr {
			Errorf(nil, "macho cannot represent section %s crossing data and bss", sect.Name)
		}
		msect.off = uint32(sect.Seg.Fileoff + sect.Vaddr - sect.Seg.Vaddr)
	} else {
		msect.off = 0

		ph.Flags |= elf.PF_X
	}
	ph.Vaddr = seg.Vaddr
	ph.Paddr = seg.Vaddr
	ph.Memsz = seg.Length
	ph.Off = seg.Fileoff
	ph.Filesz = seg.Filelen
	ph.Align = uint64(*FlagRound)

	return ph
}

func elfphrelro(seg *sym.Segment) {
	ph := newElfPhdr()
	ph.Type = elf.PT_GNU_RELRO
	ph.Flags = elf.PF_R
	ph.Vaddr = seg.Vaddr
	ph.Paddr = seg.Vaddr
	ph.Memsz = seg.Length

}

func (x *elfExe) ReadData(addr, size uint64) ([]byte, error) {
	for _, prog := range x.f.Progs {
		if prog.Vaddr <= addr && addr <= prog.Vaddr+prog.Filesz-1 {
			n := prog.Vaddr + prog.Filesz - addr
			if n > size {
				n = size
			}
			return saferio.ReadDataAt(prog, n, int64(addr-prog.Vaddr))
		}
	}
	return nil, errUnrecognizedFormat
}

func (x *elfExe) DataStart() (uint64, uint64) {

			if gotFlag := dynFlag&flag != 0; gotFlag {
				return true
			}
		}
		return false
	}

	segContainsSec := func(p *elf.Prog, s *elf.Section) bool {
		return s.Addr >= p.Vaddr &&
			s.Addr+s.FileSize <= p.Vaddr+p.Filesz
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			if test.mustInternalLink {
				testenv.MustInternalLink(t, test.mustHaveCGO)
			}

						t.Fatalf("DefaultResolver.LookupIP(%q, %q): failed with unexpected error: %v", network, host, err)
					}

					var v4Addrs []netip.Addr
					var v6Addrs []netip.Addr
					for _, ip := range ips {
						if addr, ok := netip.AddrFromSlice(ip); ok {
							if addr.Is4() {
								v4Addrs = append(v4Addrs, addr)
							} else {
								v6Addrs = append(v6Addrs, addr)
							}
						} else {

type functab struct {
	entryoff uint32 // relative to runtime.text
	funcoff  uint32
}

// Mapping information for secondary text sections

type textsect struct {
	vaddr    uintptr // prelinked section vaddr
	end      uintptr // vaddr + section length
	baseaddr uintptr // relocated section address
}

// findfuncbucket is an array of these structures.
// Each bucket represents 4096 bytes of the text segment.