Fixed some flaws

Author: Retr0-code

boot.asm

@@ -6,7 +6,7 @@ global _boot   ; Defines entrypoint
 ; Code section
 section .text:
     _boot:
-        xor ax, ax
+        xor ax, ax                  ; Clear Data and Extra segments
         mov ds, ax
 	    mov es, ax
 
@@ -108,8 +108,8 @@ GDT_start:
 
     [bits 32]
     _enter_protected_mode:
-        mov ax, DATA_SEG
-        mov ds, ax
+        mov ax, DATA_SEG                ; Write data segment to ax
+        mov ds, ax                      ; Distribute data segment to segments
 	    mov ss, ax
 	    mov es, ax
 	    mov fs, ax

build/kernel.o

@@ -3,7 +3,7 @@
 nasm -f bin -o build/boot.bin boot.asm
 nasm -f bin -o build/zeroes.bin bootloader/zeroes.asm
 nasm -f elf -o build/kernel_entry.o bootloader/kernel_entry.asm
-i386-elf-gcc -ffreestanding -m32 -g -c kernel/kernel.cpp -o build/kernel.o
+i386-elf-gcc -ffreestanding -m32 -g -c kernel/kernel.c -o build/kernel.o
 
 i386-elf-ld -o build/full_kernel.bin -Ttext 0x1000 build/kernel_entry.o build/kernel.o --oformat binary