NR_EXCEPTIONS
nr_cpu_irqs = irq_bcr.irqs + NR_EXCEPTIONS;
for (i = NR_EXCEPTIONS; i < irq_bcr.irqs + NR_EXCEPTIONS; i++) {
#define EC_MASK (NR_EXCEPTIONS - 1)
exception_handler_fn exception_handlers[NR_VECTORS][NR_EXCEPTIONS];
if (ec >= NR_EXCEPTIONS)
assert(vector < NR_EXCEPTIONS);