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73 lines
3.5 KiB
NASM
73 lines
3.5 KiB
NASM
;=----------------------------------------------------------------------------=;
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; GNU GPL OS/K ;
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; ;
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; Desc: Kernel (second stage) Loader for OS/K ;
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; (x86_64 architecture only) ;
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; ;
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; ;
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; Copyright © 2018-2019 The OS/K Team ;
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; ;
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; This file is part of OS/K. ;
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; ;
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; OS/K is free software: you can redistribute it and/or modify ;
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; it under the terms of the GNU General Public License as published by ;
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; the Free Software Foundation, either version 3 of the License, or ;
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; (at your option) any later version. ;
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; ;
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; OS/K is distributed in the hope that it will be useful, ;
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; but WITHOUT ANY WARRANTY; without even the implied warranty of ;
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;
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; GNU General Public License for more details. ;
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; ;
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; You should have received a copy of the GNU General Public License ;
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; along with OS/K. If not, see <https://www.gnu.org/licenses/>. ;
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;=----------------------------------------------------------------------------=;
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%define DEBUG
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[BITS 32]
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[global _start]
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[ORG 0x100000] ; Where GRUB loads us.
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%include "boot/loader/multiboot.inc"
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_start:
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mov ax, cs ; correcting cs after the horrible far jump
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mov ds, ax ; hm... And ds too
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mov es, ax ; And es because it is jealous
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;mov [Bootdrv], dl
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xor dl, dl
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jmp 0x0000:main ; pas sûr
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MB_header:
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align 4
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dd MB_HEADER_MAGIC
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dd MB_HEADER_FLAGS
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dd CHECKSUM
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dd MB_header ; Header address
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dd _start ; Address of code entry point
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dd 00 ; (end of code) not necessary
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dd 00 ; (bss) not necessary
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dd MB_start ; entry address GRUB will start at
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MB_start:
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mov esp, KERNEL_STACK ; Setup the stack
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push 0 ; Reset EFLAGS
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popf
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push eax ; 2nd argument is magic number
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push ebx ; 1st argument multiboot info pointer
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call main
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add esp, 8 ; Cleanup 8 bytes pushed as arguments
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jmp Die
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;; BEGIN OF THE HOLE -------------------------------------------------------- ;;
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Die:
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cli
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hlt ; die nooooow
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;jmp 0xF000:0xFFF0
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jmp $
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;; END OF THE HOLE ---------------------------------------------------------- ;;
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main:
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jmp Die
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