Nucleus

diff --git a/kernel/idt.c b/kernel/idt.c
index 0f2bdfd..6e04543 100644
--- a/kernel/idt.c
+++ b/kernel/idt.c
@@ -31,10 +31,13 @@ install_idt_entry(uint8_t num, void *addr)
 	if (num < 32)
 		type = 0x8F; /* Trap gate for exceptions */
 
+	if (num == 0x80)
+		type |= 3 << 5; /* Allowed from ring 3 */
+
 	IDT[num].offsetLower = (uintptr_t) addr & 0xFFFF;
 	IDT[num].selector = 0x08;
 	IDT[num].zero = 0;
-	IDT[num].typeAttr = type | 0x60; /* Allowed from ring 3 */
+	IDT[num].typeAttr = type;
 	IDT[num].offsetHigher = (uintptr_t) addr >> 16;
 }
 
@@ -58,8 +61,13 @@ isr_handler(struct InterruptFrame frame)
 
 	/* Run registered handler */
 	int_handler_t handler = interrupts[frame.intnum];
-	if (handler)
+	struct InterruptFrame *oldFrame;
+	if (handler) {
+		oldFrame = cpu->frame;
+		cpu->frame = &frame;
 		handler(&frame);
+		cpu->frame = oldFrame;
+	}
 }
 
 /* Register an exception handler */