scheduler_isr.s

一个操作系统的源代码

;/** scheduler_isr.s
; **
; ** Original Author: Kasper Verdich Lund
; ** Date: 11.13.99
; **
; ** Description:
; ** Low-level scheduler routines 
; **
; ** This program is free software, you can redistribute it and/or
; ** modify it under the terms of the GNU General Public License
; ** as published by the Free Software Foundation; either version
; ** 2 of the License, or (at your option) any later version.
; **
; ** This program is distributed in the hope that it will be
; ** useful, but WITHOUT ANY WARRANTY; without even the implied
; ** warranty or MERCHANTABILITY or FITNESS FOR A PARTICULAR
; ** PURPOSE.  See the GNU General Public License for more
; ** details.
; **
; ** You should have received a copy of the GNU General Public
; ** License along with this program; if not, write to the
; ** Free Software Foundation, Inc., 59 Temple Place, Suite 330,
; ** Boston, MA 02111-1307 USA
; **
; *********************************************************Apostle OS**/

	SECTION	.text

	GLOBAL __SchedulerISR
	GLOBAL __Activate

	EXTERN Scheduler
	EXTERN halt
	
	ALIGN	4
__SchedulerISR:
	mov	ax,0x23
	mov	ds,ax		; reset ds to default
	
	push	eax
	push	ecx
	push	edx
	push	ebx
	push	ebp
	push	esi
	push	edi
	call	Scheduler
	pop	edi
	pop	esi
	pop	ebp
	pop	ebx
	pop	edx
	pop	ecx
	pop	eax

	; this shouldn't happen :-(
	call	halt

__Activate:
	add	esp,4
	pop	edi
	pop	esi
	pop	ebp
	pop	ebx
	pop	edx
	pop	ecx
	pop	eax
	iret