Spexeah/Asuro
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Added the good stuff.

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git-svn-id: https://spexeah.com:8443/svn/Asuro@5 6dbc8c32-bb84-406f-8558-d1cf31a0ab0c
This commit is contained in:
kieron 2015-09-18 17:28:12 +00:00
parent e2d1d14da0
commit ca2e904cf6
2 changed files with 79 additions and 0 deletions
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bin/kernel.bin Executable file
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src/stub/stub.asm Normal file
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;/////////////////////////////////////////////////////////
;// //
;// Freepascal barebone OS //
;// stub.asm //
;// //
;/////////////////////////////////////////////////////////
;//
;// By: De Deyn Kim <kimdedeyn@skynet.be>
;// License: Public domain
;//
;
; Kernel stub
;
;
; We are in 32bits protected mode
;
[bits 32]
;
; Export entrypoint
;
[global kstart]
;
; Import kernel entrypoint
;
[extern kmain]
;
; Posible multiboot header flags
;
MULTIBOOT_MODULE_ALIGN equ 1<<0
MULTIBOOT_MEMORY_MAP equ 1<<1
MULTIBOOT_GRAPHICS_FIELDS equ 1<<2
MULTIBOOT_ADDRESS_FIELDS equ 1<<16
;
; Multiboot header defines
;
MULTIBOOT_HEADER_MAGIC equ 0x1BADB002
MULTIBOOT_HEADER_FLAGS equ MULTIBOOT_MODULE_ALIGN | MULTIBOOT_MEMORY_MAP
MULTIBOOT_HEADER_CHECKSUM equ -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)
;
; Kernel stack size
;
KERNEL_STACKSIZE equ 0x4000
section .text
;
; Multiboot header
;
align 4
dd MULTIBOOT_HEADER_MAGIC
dd MULTIBOOT_HEADER_FLAGS
dd MULTIBOOT_HEADER_CHECKSUM
;
; Entrypoint
;
kstart:
mov esp, KERNEL_STACK+KERNEL_STACKSIZE ;Create kernel stack
push eax ;Multiboot magic number
push ebx ;Multiboot info
call kmain ;Call kernel entrypoint
cli ;Clear interrupts
hlt ;Halt machine
section .bss
;
; Kernel stack location
;
align 32
KERNEL_STACK:
resb KERNEL_STACKSIZE