t := v.Type()
		sz := t.Size()
		if sz != int64(int32(sz)) {
			base.Fatalf("stack object too big: %v of type %v, size %d", v, t, sz)
		}
		lsym, useGCProg, ptrdata := reflectdata.GCSym(t)
		if useGCProg {
			ptrdata = -ptrdata
		}
		off = objw.Uint32(x, off, uint32(sz))
		off = objw.Uint32(x, off, uint32(ptrdata))
		off = objw.SymPtrOff(x, off, lsym)
	}