From d261a0f15a350d81430d3937d3c02118c395d27c Mon Sep 17 00:00:00 2001
From: Dennis Kobert <dennis@kobert.dev>
Date: Fri, 8 Nov 2019 07:28:08 +0100
Subject: Implement guarding page

---
 kernel/src/interrupts/exceptions.rs | 35 ++++++++++++++++++++++++++++++++++-
 kernel/src/interrupts/table.rs      |  4 ++++
 2 files changed, 38 insertions(+), 1 deletion(-)

(limited to 'kernel/src/interrupts')

diff --git a/kernel/src/interrupts/exceptions.rs b/kernel/src/interrupts/exceptions.rs
index 5ec7588..08555c4 100644
--- a/kernel/src/interrupts/exceptions.rs
+++ b/kernel/src/interrupts/exceptions.rs
@@ -1,7 +1,40 @@
 use crate::io::vga_text::OStream;
-use x86_64::structures::idt::InterruptStackFrame;
+use x86_64::structures::idt::{InterruptStackFrame, PageFaultErrorCode};
 
 pub extern "x86-interrupt" fn breakpoint_handler(stack_frame: &mut InterruptStackFrame) {
     let mut stdout = OStream::new();
     stdout.print(b"EXCEPTION: BREAKPOINT\n");
 }
+
+pub extern "x86-interrupt" fn page_fault_handler(
+    stack_frame: &mut InterruptStackFrame,
+    error_code: PageFaultErrorCode,
+) {
+    use x86_64::registers::control::Cr2;
+
+    let mut stdout = OStream::new();
+    stdout.print(b"EXCEPTION: PAGEFAULT\n");
+    loop {}
+    panic!("PAGE FAULT");
+    //println!("Accessed Address: {:?}", Cr2::read());
+    //println!("Error Code: {:?}", error_code);
+    //println!("{:#?}", stack_frame);
+}
+
+pub extern "x86-interrupt" fn segment_not_present_handler(
+    stack_frame: &mut InterruptStackFrame,
+    error_code: u64,
+) {
+    loop {}
+    let mut stdout = OStream::new();
+    stdout.print(b"EXCEPTION: SEGMENT NOT PRESENT\n");
+}
+
+extern "x86-interrupt" fn double_fault_handler(
+    stack_frame: &mut InterruptStackFrame,
+    _error_code: u64,
+) {
+    let mut stdout = OStream::new();
+    stdout.print(b"EXCEPTION: DOUBLE FAULT");
+    loop {}
+}
diff --git a/kernel/src/interrupts/table.rs b/kernel/src/interrupts/table.rs
index 47d6ead..6472014 100644
--- a/kernel/src/interrupts/table.rs
+++ b/kernel/src/interrupts/table.rs
@@ -7,6 +7,10 @@ lazy_static! {
         let mut idt = InterruptDescriptorTable::new();
         idt.breakpoint
             .set_handler_fn(super::exceptions::breakpoint_handler);
+        idt.page_fault
+            .set_handler_fn(super::exceptions::page_fault_handler);
+        idt.segment_not_present
+            .set_handler_fn(super::exceptions::segment_not_present_handler);
         idt
     };
 }
-- 
cgit v1.2.3-54-g00ecf