add kernel entry

2025-08-22 21:31:58 +02:00
parent f219bc7fa3
commit 05442d0725
3 changed files with 9 additions and 1 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1 @@
-boot.bin
+*.bin
--- a/5
+++ b/5
@@ -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

--- 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