From 3893276974e04b881b7b80975e81bd0193ddef3f Mon Sep 17 00:00:00 2001
From: boreddevnl <chris@boreddev.nl>
Date: Tue, 21 Apr 2026 16:41:03 +0200
Subject: [PATCH] fix(idt): print RIP, err_code, and CR2 to serial before
 kernel panic

---
 src/sys/idt.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/sys/idt.c b/src/sys/idt.c
index a3b95ee..a8ac69d 100644
--- a/src/sys/idt.c
+++ b/src/sys/idt.c
@@ -79,6 +79,14 @@ uint64_t exception_handler_c(registers_t *regs) {
 
     // Kernel mode exception
     const char *name = (vector < 32) ? exception_messages[vector] : "Unknown Kernel Exception";
+    serial_write("\nRIP: 0x"); k_itoa_hex(regs->rip, buf); serial_write(buf);
+    serial_write("\nErr: 0x"); k_itoa_hex(regs->err_code, buf); serial_write(buf);
+    if (vector == 14) { 
+        uint64_t cr2;
+        asm volatile("mov %%cr2, %0" : "=r"(cr2));
+        serial_write("\nCR2: 0x"); k_itoa_hex(cr2, buf); serial_write(buf);
+    }
+    serial_write("\n");
     kernel_panic(regs, name);
     
     return (uint64_t)regs; // Unreachable