onioctl.asm

一个虚拟光驱程序源代码

.386p

.xlist
	include vmm.inc
	include blockdev.inc
	include cdioctl.inc	
	include ior.inc
	include iop.inc

	include debug.inc
;	include iodebug.inc     ; various IOS assertions (like AssertIOP)

.list

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	extrn	hFile:WORD

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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

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public	OnCDRomIOCtl

BeginProc	OnCDRomIOCtl , esp, sCall
ArgVar	IOR_ptr,DWORD
	
	TRAP
	EnterProc
	
	mov		eax, IOR_ptr
	push		ebx
	mov		ebx, eax
	movzx		eax, [ebx]._ureq._IOR_ioctl_function
	
	cmp		eax, CD_IO_RESET_DRIVE
	je		ResetDrive

	cmp		eax, CD_IO_SEEK	
	je		Seek

	cmp		eax, CD_IO_GET_DEV_STATUS
	je		GetDevStatus

;	cmp		eax, CD_IO_QUERY_IOCTL_FUNC
;	je		QueryIoctlFunc

	cmp		eax, CD_IO_DISC_INFO
	je		GetDiscInfo
	
	mov		[ebx]._ureq._IOR_ioctl_return, IORS_INVALID_COMMAND
	xor		eax,eax
	jmp		IO_invalid	
	
IO_Quit:
	mov		[ebx].IOR_status, IORS_SUCCESS
	jmp		IO_finish

IO_invalid:
	mov		[ebx].IOR_status, IORS_INVALID_COMMAND

IO_finish:
	pop		ebx
	LeaveProc
	return

ResetDrive:

	mov		[ebx]._ureq._IOR_ioctl_return, NO_ERROR
	jmp		IO_Quit

Seek:

	mov		[ebx]._ureq._IOR_ioctl_return, NO_ERROR
	jmp		IO_Quit

GetDevStatus:

	mov		[ebx]._ureq._IOR_ioctl_return, NO_ERROR
	mov		eax, [ebx]._ureq._IOR_ioctl_buffer_ptr 
	mov		[eax].DeviceStatus, CDDEVSTAT_AUDIO_MANIPULATE
	or		[eax].DeviceStatus, CDDEVSTAT_REDBOOK_TOO
;	or		[eax].DeviceStatus, CDDEVSTAT_PLAY_AUDIO_TOO
	or		[eax].DeviceStatus, CDDEVSTAT_NO_DISK_IN_DRIVE + CDDEVSTAT_CDXA
	jmp		IO_Quit
	
GetDiscInfo:
	test		hFile, 0
;	jz		@F
;@@:
	mov		[ebx]._ureq._IOR_ioctl_return, IORS_NO_MEDIA
	jmp		IO_Quit	

QueryIoctlFunc:
	jmp		IO_Quit
		
EndProc			OnCDRomIOCtl

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	end