Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Windows VXD and IRQ Handling

Posted on 1997-05-17
1
Medium Priority
?
270 Views
Last Modified: 2013-12-03
I need the esqueleton of a Windows VxD. I also need to trap any IRQ (IRQ 7) and read from I/O 300h when IRQ occurs. I 'm programing in Delphi now but the code can be in C++ or any other languaje.
0
Comment
Question by:i9423342
1 Comment
 
LVL 2

Accepted Solution

by:
amartin030297 earned 200 total points
ID: 1397423
First of all-- I assume you have the DDK (or VToolsD [www.vireo.com]) so you can build VxD's..


VPICD_HWInt_THUNK fakeInt_Thunk;            // Thunk for interrupt handler
VPICD_VirtInt_THUNK fakeVMThunk;
VPICD_MaskChange_THUNK fakeVMMaskThunk;
void __stdcall fakeVMMask(VMHANDLE hVM, IRQHANDLE hIRQ, int isBeingMasked);
BOOL __stdcall fake_HWInt_HANDLER(VMHANDLE hVM, IRQHANDLE hIRQ);

void releaseIRQVirtualization(unsigned long irq)
{
    irq &= 0xf;
    if (hIRQ[irq])
    {
        dprintf("VxD Releasing Virtual IRQ: %d (0x%x)", irq,irq);
        VPICD_Force_Default_Behavior(hIRQ[irq]);
        hIRQ[irq]=NULL;
    }
}

void __stdcall fakeVMMask(VMHANDLE hVM, IRQHANDLE hIRQ, int isBeingMasked)
{
    VPICD_Clear_Int_Request(hVM, hIRQ);
    VPICD_Virtual_EOI(hIRQ, hVM);

    if (isBeingMasked)
    {
       
    }
    return;
}


BOOL __stdcall fake_HWInt_HANDLER(VMHANDLE hVM, IRQHANDLE hIRQ)
{
    ;...do  your phys_eoi here... I left this part out
    return TRUE;
}


BOOL requestIRQVirtualization(unsigned long irq)
{
    irq &= 0xf;
    if (hIRQ[irq])
    {
        return TRUE;
    }
    VPICD_IRQ_Descriptor vps;
    memset(&vps,0,sizeof (VPICD_IRQ_Descriptor));
    vps.VID_IRQ_Number=irq;
    vps.VID_IRET_Time_Out=0;//1000;
    vps.VID_Options=VPICD_OPT_CAN_SHARE;
    vps.VID_Hw_Int_Proc=(DWORD)VPICD_Thunk_HWInt(fake_HWInt_HANDLER, &fakeInt_Thunk);
    vps.VID_Mask_Change_Proc=(DWORD)VPICD_Thunk_MaskChange(fakeVMMask, &fakeVMMaskThunk);
    hIRQ[irq]=VPICD_Virtualize_IRQ(&vps);
    if (!hIRQ[irq])
    {
        return FALSE;
    }
    return TRUE;
}

Let me know if you need more help...

0

Featured Post

Get your Conversational Ransomware Defense e‑book

This e-book gives you an insight into the ransomware threat and reviews the fundamentals of top-notch ransomware preparedness and recovery. To help you protect yourself and your organization. The initial infection may be inevitable, so the best protection is to be fully prepared.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

As more and more people are shifting to the latest .Net frameworks, the windows presentation framework is gaining importance by the day. Many people are now turning to WPF controls to provide a rich user experience. I have been using WPF controls fo…
A theme is a collection of property settings that allow you to define the look of pages and controls, and then apply the look consistently across pages in an application. Themes can be made up of a set of elements: skins, style sheets, images, and o…
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…
This course is ideal for IT System Administrators working with VMware vSphere and its associated products in their company infrastructure. This course teaches you how to install and maintain this virtualization technology to store data, prevent vuln…

916 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question