From 05442d07253b18b435410a65caa1d1f5cf9c5069 Mon Sep 17 00:00:00 2001
From: nub31 <oliverlhs@outlook.com>
Date: Fri, 22 Aug 2025 21:31:58 +0200
Subject: [PATCH] add kernel entry

---
 .gitignore   | 2 +-
 makefile     | 5 +++++
 src/boot.asm | 3 +++
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index 90ed266..f3ac583 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1 @@
-boot.bin
\ No newline at end of file
+*.bin
\ No newline at end of file
diff --git a/makefile b/makefile
index 9713e73..78c3f6c 100644
--- a/makefile
+++ b/makefile
@@ -1,6 +1,11 @@
+build: src/boot.bin src/kernel_entry.bin
+
 src/boot.bin: src/boot.asm
 	nasm -o src/boot.bin src/boot.asm
 
+src/kernel_entry.bin: src/kernel_entry.asm
+	nasm -felf -o src/kernel_entry.bin src/kernel_entry.asm
+
 run: src/boot.bin
 	qemu-system-x86_64 -drive file=src/boot.bin,format=raw,index=0,media=disk
 
diff --git a/src/boot.asm b/src/boot.asm
index abd5548..56a84b7 100644
--- a/src/boot.asm
+++ b/src/boot.asm
@@ -28,6 +28,7 @@ mov al, 0x3
 int 0x10
 
 CODE_SEG equ gdt_code - gdt_start
+DATA_SEG equ gdt_data - gdt_start
 
 cli
 lgdt [gdt_descriptor]
@@ -37,6 +38,8 @@ mov cr0, eax
 jmp CODE_SEG:start_protected_mode
 jmp $
 
+BOOT_DISK: db 0
+
 gdt_start:
     gdt_null:
         dd 0x0