ulong             968 gc/include/gc.h #     define GC_DATASTART ((GC_PTR)((ulong)_data))
ulong             969 gc/include/gc.h #     define GC_DATAEND ((GC_PTR)((ulong)_end))
ulong            1417 gc/include/private/gcconfig.h #     define STACKBOTTOM ((ptr_t)((ulong)&errno))
ulong            1429 gc/include/private/gcconfig.h #   define DATASTART ((ptr_t)((ulong)_data))
ulong            1430 gc/include/private/gcconfig.h #   define DATAEND ((ptr_t)((ulong)_end))