From 027b5e0fb4be55a314d2168c92e99772cc80f442 Mon Sep 17 00:00:00 2001
From: Anton Kling <anton@kling.gg>
Date: Wed, 1 Nov 2023 21:41:54 +0100
Subject: Exceptions: Output CR2 on page fault

---
 kernel/cpu/idt.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'kernel/cpu')

diff --git a/kernel/cpu/idt.c b/kernel/cpu/idt.c
index bf0061f..0a5cc77 100644
--- a/kernel/cpu/idt.c
+++ b/kernel/cpu/idt.c
@@ -84,6 +84,10 @@ __attribute__((interrupt)) void page_fault(registers_t *regs) {
   kprintf("Error Code: %x\n", regs->error_code);
   kprintf("Instruction Pointer: %x\n", regs->eip);
 
+  volatile uint32_t cr2;
+  asm volatile("mov %%cr2, %0" : "=r"(cr2));
+  kprintf("CR2: %x\n", cr2);
+
   if (regs->error_code & (1 << 0))
     kprintf("page-protection violation\n");
   else
-- 
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