From 1faac72e2514c335e2d5721dce8c9fd1da722062 Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Sat, 10 Jul 2021 16:17:43 +0200
Subject: add a basic #GP handler

---
 kernel/idt.c | 1 +
 kernel/isr.c | 6 ++++++
 kernel/isr.h | 3 +++
 3 files changed, 10 insertions(+)

(limited to 'kernel')

diff --git a/kernel/idt.c b/kernel/idt.c
index 96d6d15..65f511f 100644
--- a/kernel/idt.c
+++ b/kernel/idt.c
@@ -53,6 +53,7 @@ static void idt_prepare() {
 		IDT[i].present = 0;
 
 	idt_add(0x08, false, isr_double_fault);
+	idt_add(0x0d, false, isr_general_protection_fault);
 	idt_add(0x34, false, isr_test_interrupt);
 }
 
diff --git a/kernel/isr.c b/kernel/isr.c
index e6a9871..b715de0 100644
--- a/kernel/isr.c
+++ b/kernel/isr.c
@@ -12,6 +12,12 @@ void isr_double_fault(struct interrupt_frame *frame) {
 	panic();
 }
 
+__attribute__((interrupt))
+void isr_general_protection_fault(struct interrupt_frame *frame) {
+	tty_const("#GP");
+	panic();
+}
+
 __attribute__((interrupt))
 void isr_test_interrupt(struct interrupt_frame *frame) {
 	isr_test_interrupt_called = true;
diff --git a/kernel/isr.h b/kernel/isr.h
index 624e9ad..150fc46 100644
--- a/kernel/isr.h
+++ b/kernel/isr.h
@@ -8,5 +8,8 @@ extern bool isr_test_interrupt_called; // used in the self-test in idt.c
 __attribute__((interrupt))
 void isr_double_fault(struct interrupt_frame *frame);
 
+__attribute__((interrupt))
+void isr_general_protection_fault(struct interrupt_frame *frame);
+
 __attribute__((interrupt))
 void isr_test_interrupt(struct interrupt_frame *frame);
-- 
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