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))