59 lines
1013 B
ArmAsm
59 lines
1013 B
ArmAsm
global start
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extern kernel_main ; Allow main() to be called from the assembly code
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extern start_ctors, end_ctors, start_dtors, end_dtors
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MODULEALIGN equ 1<<0
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MEMINFO equ 1<<1
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FLAGS equ MODULEALIGN | MEMINFO
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MAGIC equ 0x1BADB002
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CHECKSUM equ -(MAGIC + FLAGS)
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section .text ; Next is the Grub Multiboot Header
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align 4
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MultiBootHeader:
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dd MAGIC
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dd FLAGS
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dd CHECKSUM
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STACKSIZE equ 0x4000 ; 16 KiB if you're wondering
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static_ctors_loop:
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mov ebx, start_ctors
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jmp .test
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.body:
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call [ebx]
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add ebx,4
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.test:
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cmp ebx, end_ctors
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jb .body
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start:
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mov esp, STACKSIZE+stack
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push eax
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push ebx
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call kernel_main
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static_dtors_loop:
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mov ebx, start_dtors
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jmp .test
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.body:
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call [ebx]
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add ebx,4
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.test:
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cmp ebx, end_dtors
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jb .body
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cpuhalt:
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hlt
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jmp cpuhalt
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section .bss
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align 32
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stack:
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resb STACKSIZE
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