// Notes:
	// - this version writes everything little-endian, which means
	//   a call is needed to encode every value (expensive)
	// - we may want to move to a model in which we just blast out
	//   all counters, or possibly mmap the file and do the write
	//   implicitly.
	ctrb := make([]byte, 4)
	wrval := func(val uint32) error {
		var buf []byte
		var towr int
		if cfw.cflavor == coverage.CtrRaw {

//sys	Umask(newmask int) (oldmask int)
//sys	Unlink(path string) (err error)
//sys	Unmount(path string, flags int) (err error)
//sys	write(fd int, p []byte) (n int, err error)
//sys	mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
//sys	munmap(addr uintptr, length uintptr) (err error)
//sys	readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ

func getIstioVersions(ctx cli.Context, istioNamespace string, revisions []string) (map[string]string, map[string][]string) {
	istioVersions := make(map[string]string)
	proxyVersionsMap := make(map[string]sets.String)
	proxyVersions := make(map[string][]string)
	for _, revision := range revisions {
		client, err := ctx.CLIClientWithRevision(revision)
		if err != nil {

//sys	mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
//sys	Pause() (err error)

func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
	page := uintptr(offset / 4096)
	if offset != int64(page)*4096 {
		return 0, EINVAL
	}

//sys	Umask(newmask int) (oldmask int)
//sys	Undelete(path string) (err error)
//sys	Unlink(path string) (err error)
//sys	Unmount(path string, flags int) (err error)
//sys	write(fd int, p []byte) (n int, err error)
//sys   mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
//sys   munmap(addr uintptr, length uintptr) (err error)
//sys	readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ

	return Fchownat(_AT_FDCWD, path, uid, gid, _AT_SYMLINK_NOFOLLOW)
}

func Lstat(path string, stat *Stat_t) (err error) {
	return fstatat(_AT_FDCWD, path, stat, _AT_SYMLINK_NOFOLLOW)
}

func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
	page := uintptr(offset / 4096)
	if offset != int64(page)*4096 {
		return 0, EINVAL
	}

//sys	Umask(newmask int) (oldmask int)
//sys	Undelete(path string) (err error)
//sys	Unlink(path string) (err error)
//sys	Unmount(path string, flags int) (err error)
//sys	write(fd int, p []byte) (n int, err error)
//sys   mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
//sys   munmap(addr uintptr, length uintptr) (err error)
//sys	readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ

	}
	return i
}

// Mmap manager, for use by operating system-specific implementations.

type mmapper struct {
	sync.Mutex
	active map[*byte][]byte // active mappings; key is last byte in mapping
	mmap   func(addr, length uintptr, prot, flags, fd int, offset int64) (uintptr, error)
	munmap func(addr uintptr, length uintptr) error
}

    return;
  }

  struct stat st;
  fstat(fd, &st);
  if (S_ISDIR(st.st_mode)) {
    TF_SetStatus(status, TF_FAILED_PRECONDITION, "path is a directory");
  } else {
    const void* address =
        mmap(nullptr, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
    if (address == MAP_FAILED) {
      TF_SetStatusFromIOError(status, errno, path);
    } else {
      region->plugin_memory_region =

		ldr:      ctxt.loader,
		arch:     ctxt.Arch,
		tmap:     make(map[string]loader.Sym),
		tdmap:    make(map[loader.Sym]loader.Sym),
		rtmap:    make(map[loader.Sym]loader.Sym),
	}
	d.typeRuntimeEface = d.lookupOrDiag("type:runtime.eface")
	d.typeRuntimeIface = d.lookupOrDiag("type:runtime.iface")

	if ctxt.HeadType == objabi.Haix {
		// Initial map used to store package size for each DWARF section.