jankos/loader.s

28 lines
535 B
ArmAsm

; since we have no stack we have to create one for the OS
global loader
; NOTE: these symbols are what we use to represent the "magic bytes" for the whole os
MAGIC_NUMBER equ 0x1BADB002
FLAGS equ 0x0
CHECKSUM equ -MAGIC_NUMBER
extern kmain
section .text
; align all instructions to 4 byte boundary by the x86 instruction set law
align 4
; dropping our magic and other things into memory
dd MAGIC_NUMBER
dd FLAGS
dd CHECKSUM
; sets up our gdt and segment selectors for later use
loader:
call kmain
.loop:
jmp .loop