timerint.s

来自「阿基米德操作系统的源代码」· S 代码 · 共 52 行

.globl timer_interrupt
.globl jiffies

.align 4
jiffies:	.long 0

.align 4
timer_interrupt:
	cld
	pushl	%eax
	pushl	%ebx
	pushl	%ecx
	pushl	%edx
	pushl	%esi
	pushl	%edi
	pushl	%ebp

	push	%ds
	push	%es
	push	%fs
	push	%gs

	movl	$0x10,%eax
	mov		%ax,%ds
	mov		%ax,%es
	mov		%ax,%fs


	incl	jiffies

	movl	$do_timer,%eax
	call	*%eax		

	movb	$0x20,%al
	outb	%al,$0x20

	pop		%gs
	pop		%fs
	pop		%es
	pop		%ds

	popl	%ebp
	popl	%edi
	popl	%esi
	popl	%edx
	popl	%ecx
	popl	%ebx
	popl	%eax

	iret