From 5a9a57177f730d1c00ab2b47f91e5ea2660a4f77 Mon Sep 17 00:00:00 2001
From: Loic Guegan <manzerbredes@mailbox.org>
Date: Tue, 13 Apr 2021 15:31:45 +0200
Subject: Enable .bss zeroing and improve paging

---
 src/boot/boot.S | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'src/boot')

diff --git a/src/boot/boot.S b/src/boot/boot.S
index e436cbb..9777fbf 100644
--- a/src/boot/boot.S
+++ b/src/boot/boot.S
@@ -3,6 +3,8 @@
 .extern bringelle
 .extern gdt_memcpy
 .extern mb_load_fb_tag
+.extern _bss_start
+.extern _bss_end
 
 .set STACK_LOCATION, 0x1FFFFF
 
@@ -73,6 +75,17 @@ movl $STACK_LOCATION,%esp
 mov $0x38, %eax
 ltr %ax
 
+# Zeroing the .bss section
+mov $_bss_start, %eax
+mov $_bss_end, %ebx
+start_zeroing:
+    movb $0x0, (%eax)
+    cmp %eax, %ebx
+    je end_zeroing
+    inc %eax
+    jmp start_zeroing
+end_zeroing:
+
 # Start kernel main function
 call bringelle
 
-- 
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