src/kernel/boot.asm


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section .start_section
    dd _start

; Initialize stack
section .bss
    align 16
    global STACK_BOTTOM
    global STACK_TOP

    STACK_BOTTOM:
        resb 0x4000
    STACK_TOP:

section .text
    global _start
    extern kernel_main
    _start:
        mov esp, STACK_TOP
        push ebx
        push eax
        cli
        call kernel_main
        cli

    hlt_L:
        hlt
        jmp hlt_L

    %include "src/kernel/gdt/gdt.asm"

    %include "src/kernel/interrupts/idt.asm"

    %include "src/kernel/interrupts/isr.asm"

    %include "src/kernel/interrupts/irq.asm"

    %include "src/kernel/interact.asm"

    global jump_userspace
    jump_userspace:
        cli
        mov ebx, dword [esp + 4]

        mov ax, 0x23
        mov ds, ax
        mov es, ax
        mov fs, ax
        mov gs, ax

        mov eax, esp
        push 0x23
        push eax
        pushf

        ; Enable interrupts
        pop eax
        or eax, 0x200
        push eax

        push 0x1B
        push ebx
        mov ebp, ebx
        iret

section .end_section
    global ASM_KERNEL_END
    ASM_KERNEL_END:
        ; Kernel size detection