46 lines
590 B
ArmAsm
46 lines
590 B
ArmAsm
global loader
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MAGIC_NUMBER equ 0x1BADB002 ; multiboot magic
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FLAGS equ 0x0
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CHECKSUM equ -MAGIC_NUMBER
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KERNEL_STACK_SIZE equ 4096
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section .text:
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align 4
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dd MAGIC_NUMBER
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dd FLAGS
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dd CHECKSUM
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extern kmain
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loader:
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cli
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; mov eax, 0xCAFEBABE
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push dword 42
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call kmain
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.loop:
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jmp .loop
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global gdt_flush
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extern gp
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gdt_flush:
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lgdt [gp]
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mov ax, 0x10
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mov ds, ax
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mov es, ax
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mov fs, ax
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mov gs, ax
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mov ss, ax
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jmp 0x08:flush2
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flush2:
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ret
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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_SIZE
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mov esp, kernel_stack + KERNEL_STACK_SIZE
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