enter_fs.s

虚拟地址空间基于文件的操作系统

.global enter_file_system,copy_os_data

copy_os_data:
	movl $(0xc0001000),%edi
	movl 0x04(%esp),%esi
	movl $(0x1000),%ecx
1:
	movl %cs:(%esi),%eax
	movl %eax,(%edi)
	addl $(0x04),%esi
	addl $(0x04),%edi
	subl $(0x04),%ecx
	jne 1b
	ret

enter_file_system:
	movl $(0xc0000ffc),%esp
	pushl %ebp
	pushl %edi
	pushl %esi
	pushl %edx
	pushl %ecx
	pushl %ebx
	pushl %eax
	pushl %esp
	call file_system_call_deal
	popl %ebx
	popl %ebx
	popl %ebx
	popl %ecx
	popl %edx
	popl %esi
	popl %edi
	popl %ebp

	movl %eax,%ebx
1:
	movl $(0x03),%eax
	int $(0x80)
	movl $(0x00),%ebx
	jmp 1b