exception_isr.s

一个操作系统的源代码

;/** exception_isr.s
; **
; ** Original Author: Guido de Jong
; ** Date: 10/18/99
; **
; ** Description:
; ** Exception Interrupt Service Routines.
; ** Errorcode 0 is pushed onto stack if not done by hardware.
; ** Then the exception number is pushed onto the stack. From that
; ** point all exceptions are handled identically.
; ** 
; ** Segment registers are set up and general exception service
; ** routine is called.
; **
; ** 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	__DivideError
	GLOBAL	__DebugException
	GLOBAL	__NonMaskableInterrupt
	GLOBAL	__Breakpoint
	GLOBAL	__Overflow
	GLOBAL	__BoundsCheck
	GLOBAL	__InvalidOpcode
	GLOBAL	__CoprocessorNotAvailable
	GLOBAL	__DoubleFault
	GLOBAL	__CoprocessorSegmentOverrun
	GLOBAL	__InvalidTSS
	GLOBAL	__SegmentNotPresent
	GLOBAL	__StackException
	GLOBAL	__GeneralProtection
	GLOBAL	__PageFault	
	GLOBAL	__Reserved
	GLOBAL	__CoprocessorError
	GLOBAL	__AlignmentCheck

	EXTERN	exceptionHandler


	ALIGN	4
__DivideError:
	push	dword 0
	push	dword 0
	jmp	__all_exceptions


	ALIGN	4
__DebugException:
	push	dword 0
	push	dword 1
	jmp	__all_exceptions


	ALIGN	4
__NonMaskableInterrupt:
	push	dword 0
	push	dword 2
	jmp	__all_exceptions


	ALIGN	4
__Breakpoint:
	push	dword 0
	push	dword 3
	jmp	__all_exceptions


	ALIGN	4
__Overflow:
	push	dword 0
	push	dword 4
	jmp	__all_exceptions


	ALIGN	4
__BoundsCheck:
	push	dword 0
	push	dword 5
	jmp	__all_exceptions


	ALIGN	4
__InvalidOpcode:
	push	dword 0
	push	dword 6
	jmp	__all_exceptions


	ALIGN	4
__CoprocessorNotAvailable:
	push	dword 0
	push	dword 7
	jmp	__all_exceptions


	ALIGN	4
__DoubleFault:
	push	dword 8
	jmp	__all_exceptions


	ALIGN	4
__CoprocessorSegmentOverrun:
	push	dword 0
	push	dword 9
	jmp	__all_exceptions


	ALIGN	4
__InvalidTSS:
	push	dword 10
	jmp	__all_exceptions


	ALIGN	4
__SegmentNotPresent:
	push	dword 11
	jmp	__all_exceptions


	ALIGN	4
__StackException:
	push	dword 12
	jmp	__all_exceptions


	ALIGN	4
__GeneralProtection:	
	push	dword 13
	jmp	__all_exceptions


	ALIGN	4
__PageFault:	
	push	dword 14
	jmp	__all_exceptions


	ALIGN	4
__Reserved:
	push	dword 0
	push	dword 15
	jmp	__all_exceptions

	
	ALIGN	4
__CoprocessorError:
	push	dword 0
	push	dword 16
	jmp	__all_exceptions


	ALIGN	4
__AlignmentCheck:
	push	dword 0
	push	dword 17
	jmp	__all_exceptions


__all_exceptions:
	push	ds
	push	es
	push	fs
	push	gs
	pusha

	mov	ax,0x23		; reset ds to default
	mov	ds,ax

	call	exceptionHandler

	popa
	pop	gs
	pop	fs
	pop	es
	pop	ds

	add	esp, byte 8	
	iret