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Этот пример использует API трансляции вместе с int21h, 440Dh, младший код 66h, Get Media ID, чтобы получить букву первого жесткого диска.

;--------------------------------------------------------------- ; VxDLabel.asm ;--------------------------------------------------------------- .386p include \masm\include\vmm.inc include \masm\include\vwin32.inc include \masm\include\v86mmgr.inc

VxDName TEXTEQU

ControlName TEXTEQU

VxDMajorVersion TEXTEQU <1> VxDMinorVersion TEXTEQU <0>

VxD_STATIC_DATA_SEG VxD_STATIC_DATA_ENDS

VXD_LOCKED_CODE_SEG ;------------------------------------------------------------------------ ; Remember: The name of the vxd MUST be uppercase else it won't work/unload ;------------------------------------------------------------------------

DECLARE_VIRTUAL_DEVICE %VxDName,%VxDMajorVersion,%VxDMinorVersion, %ControlName,UNDEFINED_DEVICE_ID,UNDEFINED_INIT_ORDER

Begin_control_dispatch %VxDName Control_Dispatch W32_DEVICEIOCONTROL, OnDeviceIoControl End_control_dispatch %VxDName

VXD_LOCKED_CODE_ENDS

VXD_PAGEABLE_CODE_SEG BeginProc OnDeviceIoControl assume esi:ptr DIOCParams .if [esi].dwIoControlCode==1 VMMCall Get_Sys_VM_Handle mov Handle,ebx assume ebx:ptr cb_s mov ebp,[ebx+CB_Client_Pointer] mov ecx,sizeof MID stc push esi mov esi,OFFSET32 MediaID push ds pop fs VxDCall V86MMGR_Allocate_Buffer pop esi jc EndI mov AllocSize,ecx Push_Client_State VMMCall Begin_Nest_V86_Exec assume ebp:ptr Client_Byte_Reg_Struc mov [ebp].Client_ch,8 mov [ebp].Client_cl,66h assume ebp:ptr Client_word_reg_struc mov edx,edi mov [ebp].Client_bx,3 ; drive A mov [ebp].Client_ax,440dh mov [ebp].Client_dx,dx shr edx,16 mov [ebp].Client_ds,dx mov eax,21h VMMCall Exec_Int VMMCall End_Nest_Exec Pop_Client_State ;------------------------------- ; retrieve the data ;------------------------------- mov ecx,AllocSize stc mov ebx,Handle push esi mov esi,OFFSET32 MediaID push ds pop fs VxDCall V86MMGR_Free_Buffer pop esi mov edx,esi assume edx:ptr DIOCParams mov edi,[edx].lpvOutBuffer mov esi,OFFSET32 MediaID.midVolLabel mov ecx,11 rep movsb mov byte ptr [edi],0 mov ecx,[edx].lpcbBytesReturned mov dword ptr [edx],11 EndI: .endif xor eax,eax ret EndProc OnDeviceIoControl VXD_PAGEABLE_CODE_ENDS




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