}

// userMap and groupMap caches UID and GID lookups for performance reasons.
// The downside is that renaming uname or gname by the OS never takes effect.
var userMap, groupMap sync.Map // map[int]string

func statUnix(fi fs.FileInfo, h *Header, doNameLookups bool) error {
	sys, ok := fi.Sys().(*syscall.Stat_t)
	if !ok {
		return nil
	}
	h.Uid = int(sys.Uid)
	h.Gid = int(sys.Gid)
	if doNameLookups {

	MSR	R6, ERXFR_EL1                                    // ERROR "system register is not writable"
	MSR	R6, ERXPFGF_EL1                                  // ERROR "system register is not writable"
	MSR	R6, GMID_EL1                                     // ERROR "system register is not writable"
	MSR	R6, ICC_HPPIR0_EL1                               // ERROR "system register is not writable"