apic: fix timer and keyboard handling

src/kernel/isr.c

@@ -19,6 +19,7 @@ struct interrupt_frame
     uword_t ss;
 };
 
+__attribute__((interrupt)) void spurious(struct interrupt_frame *frame);
 __attribute__((interrupt)) void isr_timer(struct interrupt_frame *frame);
 void isr_custom();
 void default_handler();
@@ -68,6 +69,8 @@ void isr_install() {
 
     idt_set_descriptor(0x80, (uint32)sys_exit_handler, 0xEE);
 
+    idt_set_descriptor(255, (uint32)spurious, 0x8E);
+
     idt_set(); // Load with ASM
     printf("isr_install done\n");
 }
@@ -102,6 +105,11 @@ void handle_page_fault(uint32_t error_code, uint32_t faulting_address)
     asm("hlt");
 }
 
+__attribute__((interrupt)) void spurious(struct interrupt_frame *frame)
+{
+    lapic_eoi();
+}
+
 __attribute__((interrupt)) void isr_timer(struct interrupt_frame *frame)
 {
     if(lapic_enabled)