From 61683bccdab5b49000d3b81ddba805994c74ac9f Mon Sep 17 00:00:00 2001
From: Philipp Oppermann <dev@phil-opp.com>
Date: Wed, 13 Mar 2019 13:52:16 +0100
Subject: [PATCH] Print non-empty level 4 table entries

---
 src/main.rs | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 98e3b337..5445717a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -11,7 +11,7 @@ entry_point!(kernel_main);
 #[cfg(not(test))]
 fn kernel_main(boot_info: &'static BootInfo) -> ! {
     use blog_os::interrupts::PICS;
-    use x86_64::registers::control::Cr3;
+    use blog_os::memory::active_level_4_table;
 
     println!("Hello World{}", "!");
 
@@ -20,11 +20,12 @@ fn kernel_main(boot_info: &'static BootInfo) -> ! {
     unsafe { PICS.lock().initialize() };
     x86_64::instructions::interrupts::enable();
 
-    let (level_4_page_table, _) = Cr3::read();
-    println!(
-        "Level 4 page table at: {:?}",
-        level_4_page_table.start_address()
-    );
+    let l4_table = unsafe { active_level_4_table(boot_info.physical_memory_offset) };
+    for (i, entry) in l4_table.iter().enumerate() {
+        if !entry.is_unused() {
+            println!("L4 Entry {}: {:?}", i, entry);
+        }
+    }
 
     println!("It did not crash!");
     blog_os::hlt_loop();