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Kernel head

This is a late post. Simply explains how the kernel sits in after grub.



[BITS 32]
	
global _start
extern kernel_entry
	
PAGEALIGN	equ 1<<0
MEMORYINFO	equ 1<<1
HEADERFLAGS	equ PAGEALIGN | MEMORYINFO ; 0x3 that is
HEADERMAGIC	equ 0x1BADB002
CHECKSUM	equ -(HEADERMAGIC + HEADERFLAGS)
STACKSIZE	equ 0x4000
	
section .text
ALIGN 4 	; section must be 4 byte-aligned
multibootheader	;
	dd HEADERMAGIC
	dd HEADERFLAGS
	dd CHECKSUM
	
_start:
	mov esp, stack+STACKSIZE
	push eax
	push ebx
	call kernel_entry
	jmp $
	
; GDT here
	
; ISRs here
	
section .bss
ALIGN 4
stack	resb STACKSIZE	; 16KB of memory

I’m just sad tonight, that’s why I decided to post this out of nothing. Well I guess keeping myself busy would be wise enough.

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