From 7c6a18d77a81f232ad2e1d3a311bb21ea8f1f5b4 Mon Sep 17 00:00:00 2001
From: Benji Dial <benji@benjidial.net>
Date: Sun, 14 Jan 2024 12:29:35 -0500
Subject: register interrupts 0x08 - 0x0f

---
 applications/init/main.cpp |  6 +++++-
 kernel/interrupts.asm      | 10 +++++++---
 kernel/interrupts.cpp      |  8 +++++++-
 3 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/applications/init/main.cpp b/applications/init/main.cpp
index a3f75e4..e0019b5 100644
--- a/applications/init/main.cpp
+++ b/applications/init/main.cpp
@@ -22,5 +22,9 @@ int main(int, char **) {
     }
   mercury::syscall::draw_framebuffer();
 
-  return 1 / 0;
+  //*(int *)0x12345678 = 0;
+  //fb_width = *(uint32_t *)0xffffffffc0000000;
+  //return 100 / (uint8_t)(uint64_t)fb;
+  return 0;
+
 }
diff --git a/kernel/interrupts.asm b/kernel/interrupts.asm
index c375ee4..4827cfd 100644
--- a/kernel/interrupts.asm
+++ b/kernel/interrupts.asm
@@ -64,6 +64,8 @@ exception_info:
   resq 1
 .r15:
   resq 1
+.cr2:
+  resq 1
 .cr3:
   resq 1
 .rip:
@@ -181,6 +183,8 @@ exception_common:
   pop rax
   mov qword [exception_info.rsp], rax
 
+  mov rax, cr2
+  mov qword [exception_info.cr2], rax
   mov rax, cr3
   mov qword [exception_info.cr3], rax
 
@@ -200,7 +204,7 @@ set_isr:
   shr rdx, 16
   mov dword [rdi + 8], edx
 
-  or sil, 0xef
+  or sil, 0x8e
   mov byte [rdi + 5], sil
   mov word [rdi + 2], 0x28
   mov byte [rdi + 4], 1
@@ -225,13 +229,13 @@ section .text
 
 load_gdt_and_idt:
 
-  mov rcx, 8
+  mov rcx, 16
 
 .loop:
 
   mov rdi, rcx
   dec rdi
-  mov sil, 1
+  mov sil, 0
   mov rdx, qword [exception_isrs + rdi * 8]
   call set_isr
 
diff --git a/kernel/interrupts.cpp b/kernel/interrupts.cpp
index 65daf91..8ac986d 100644
--- a/kernel/interrupts.cpp
+++ b/kernel/interrupts.cpp
@@ -21,6 +21,7 @@ struct [[gnu::packed]] exception_info_t {
   uint64_t r14;
   uint64_t r15;
 
+  uint64_t cr2;
   uint64_t cr3;
   uint64_t rip;
   uint64_t rflags;
@@ -103,7 +104,12 @@ extern "C" [[noreturn]] void print_exception() {
       if (((exception_info.rflags >> i) & 1) == 1)
         terminal::put_string_sz(flag_names[i]);
 
-  print_line("rip", "cr3", exception_info.rip, exception_info.cr3);
+  if (exception_info.exception_number == 0x0e) {
+    terminal::put_string_sz("\n  cr2: 0x");
+    terminal::put_int_hex(exception_info.cr2, 16);
+  }
+
+  print_line("cr3", "rip", exception_info.cr3, exception_info.rip);
   print_line("rax", "rbx", exception_info.rax, exception_info.rbx);
   print_line("rcx", "rdx", exception_info.rcx, exception_info.rdx);
   print_line("rdi", "rsi", exception_info.rdi, exception_info.rsi);
-- 
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