INT_STACK_SIZE
((framep)->fp > (u_int)cpuinfo.eintstack - INT_STACK_SIZE && \
intstack = uvm_km_alloc(kernel_map, INT_STACK_SIZE, 0, UVM_KMF_WIRED);
cpi->eintstack = (void*)(intstack + INT_STACK_SIZE);
(u_int)(fr) >= (u_int)ddb_cpuinfo->eintstack - INT_STACK_SIZE \