Removed 'interrupt' attribute from isr_ap_start()

Added message to division by 0 exception

src/x86/isr.c

@@ -1,9 +1,10 @@
 #include "isr.h"
+#include "stdio.h"
 
 __attribute__ ((interrupt))
 void isr_division_by_zero(void* frame)
 {
-    
+    printf("Exception: Division by zero\n");
 }
 
 __attribute__ ((interrupt))
@@ -24,7 +25,7 @@ void isr_double_fault(void* frame, unsigned int error)
     asm("hlt");
 }
 
-__attribute__ ((interrupt, naked))
+__attribute__ ((naked))
 void isr_ap_start(void* frame)
 {
     asm(".code16");