27 lines
906 B
NASM
27 lines
906 B
NASM
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; vulcanOS Kernel ;
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; Developed by Marco 'icebit' Cetica ;
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; (c) 2019-2021 ;
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; Released under GPLv3 ;
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; https://github.com/ice-bit/vulcanos ;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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GLOBAL kernel_loader
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EXTERN kernel_main
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[BITS 32] ; Ensure we are in protected mode
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section .text
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kernel_loader:
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mov esp, kernel_stack + KERNEL_STACK_SZ ; Define stack pointer
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push eax ; Set multiboot header register
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call kernel_main ; Call kernel's main function
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.loop:
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jmp .loop ; If the kernel returns, go into an endless loop
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; This will prevent the CPU to execure any non-kernel
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; instructions.
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KERNEL_STACK_SZ equ 4096 ; Stack size(4KiB)
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section .bss
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align 4
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kernel_stack:
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resb KERNEL_STACK_SZ ; Reserver 4KiB for kernel's stack
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