entry.s

用于汇编领域的,运用于OS的MAIN函数.基于硬件基础的源代码

.text
.code32

ret_from_exception:
	popl	%ebx
	popl	%ecx
	popl	%edx
	popl	%esi
	popl	%edi
	popl	%ebp
	popl	%eax
	popl	%ds
	popl	%es
	popl	%fs
	iret

.global	divide_error
.align 4
divide_error:
	pushl	$0
	pushl	$do_divide_error
.align 4
error_code:
	pushl	%fs
	pushl	%es
	pushl	%ds
	pushl	%eax
	pushl	%ebp
	pushl	%edi
	pushl	%esi
	pushl	%edx
	pushl	%ecx
	pushl	%ebx

	movl	40(%esp), %eax		# function address
	call	*%eax
	jmp	ret_from_exception


.extern timer_handler
.global timer_isr
.align 4
timer_isr:
	cli
	pushl	%fs
	pushl	%es
	pushl	%ds
	pushl	%eax
	pushl	%ebp
	pushl	%edi
	pushl	%esi
	pushl	%edx
	pushl	%ecx
	pushl	%ebx
	cld
	call	timer_handler
	popl	%ebx
	popl	%ecx
	popl	%edx
	popl	%esi
	popl	%edi
	popl	%ebp
	popl	%eax
	popl	%ds
	popl	%es
	popl	%fs
	sti
	iret


.extern kbd_handler
.global kbd_isr
.align 4
kbd_isr:
	cli
	pushl	%fs
	pushl	%es
	pushl	%ds
	pushl	%eax
	pushl	%ebp
	pushl	%edi
	pushl	%esi
	pushl	%edx
	pushl	%ecx
	pushl	%ebx
	cld
	call	kbd_handler
	popl	%ebx
	popl	%ecx
	popl	%edx
	popl	%esi
	popl	%edi
	popl	%ebp
	popl	%eax
	popl	%ds
	popl	%es
	popl	%fs
	sti
	iret