type CodeSigCmd struct {
	Cmd      uint32 // LC_CODE_SIGNATURE
	Cmdsize  uint32 // sizeof this command (16)
	Dataoff  uint32 // file offset of data in __LINKEDIT segment
	Datasize uint32 // file size of data in __LINKEDIT segment
}

func FindCodeSigCmd(f *macho.File) (CodeSigCmd, bool) {
	get32 := f.ByteOrder.Uint32
	for _, l := range f.Loads {
		data := l.Raw()
		cmd := get32(data)

	// __DATA_CONST                1035bc000-103a48000    [ 4656K  3824K     0K     0K] r--/rwSM=COW          /Users/USER/*/gopls
	// __LINKEDIT                  103b00000-103c98000    [ 1632K  1616K     0K     0K] r--/r-SM=COW          /Users/USER/*/gopls
	// dyld private memory         103cd8000-103cdc000    [   16K     0K     0K     0K] ---/--SM=NUL

			&SegmentHeader{LoadCmdSegment, 0x7c, "__IMPORT", 0x3000, 0x1000, 0x2000, 0x1000, 0x7, 0x7, 0x1, 0x0},
			&SegmentHeader{LoadCmdSegment, 0x38, "__LINKEDIT", 0x4000, 0x1000, 0x3000, 0x12c, 0x7, 0x1, 0x0, 0x0},
			nil, // LC_SYMTAB
			nil, // LC_DYSYMTAB
			nil, // LC_LOAD_DYLINKER
			nil, // LC_UUID
			nil, // LC_UNIXTHREAD

	// for code signing to work. So we'll need to move the
	// linkedit section, but all the others can be copied directly.
	linkseg := exem.Segment("__LINKEDIT")
	if linkseg == nil {
		return fmt.Errorf("missing __LINKEDIT segment")
	}

	if _, err := exef.Seek(0, 0); err != nil {
		return err
	}
	if _, err := io.CopyN(outf, exef, int64(linkseg.Offset)); err != nil {
		return err
	}

		s5 := ldr.SymSize(ctxt.ArchSyms.LinkEditGOT)
		s6 := ldr.SymSize(ldr.Lookup(".machosymstr", 0))
		s7 := ldr.SymSize(ldr.Lookup(".machocodesig", 0))

		if ctxt.LinkMode != LinkExternal {
			ms := newMachoSeg("__LINKEDIT", 0)
			ms.vaddr = uint64(Rnd(int64(Segdata.Vaddr+Segdata.Length), *FlagRound))
			ms.vsize = uint64(s1 + s2 + s3 + s4 + s5 + s6 + s7)
			ms.fileoffset = uint64(linkoff)
			ms.filesize = ms.vsize
			ms.prot1 = 1