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; Cheers to wiki.osdev.org for this quick starter. It really helped me
; get a prototype off the ground quickly without pissing around
; Declare constants used for creating a multiboot header.
MBALIGN equ 1<<0 ; align loaded modules on page boundaries
MEMINFO equ 1<<1 ; Ask for memory map
FLAGS equ MBALIGN | MEMINFO
MAGIC equ 0x1BADB002
CHECKSUM equ -(MAGIC + FLAGS)
; Standard mutliboot header so GRUB and other bootloaders can boot the kernel
section .multiboot
align 4
dd MAGIC
dd FLAGS
dd CHECKSUM
; Init our very own 16K stack
section .bootstrap_stack
align 4
stack_bottom:
times 16384 db 0
stack_top:
section .text
global _start
global _kernel_exit
_start:
; Functions in external objects
extern kernel_main
extern console_print_string
extern console_set_color
; Set stack up ready for C
mov esp, stack_top
push eax
push ebx
call kernel_main
; Let the user know that kernel_main() exited
push 0x0A
call console_set_color ; Reset text colour
push exitmain
call console_print_string
; Wake us not from our slumber
cli
_kernel_exit:
.hang:
hlt
jmp .hang
exitmain db 10,"boot: kernel_main() exited",0
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