Solved

Windows VXD and IRQ Handling

Posted on 1997-05-17
1
261 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
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 2

Accepted Solution

by:
amartin030297 earned 100 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

Online Training Solution

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action. Forget about retraining and skyrocket knowledge retention rates.

Question has a verified solution.

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

This article describes how to add a user-defined command button to the Windows 7 Explorer toolbar.  In the previous article (http://www.experts-exchange.com/A_2172.html), we saw how to put the Delete button back there where it belongs.  "Delete" is …
What my article will show is if you ever had to do processing to a listbox without being able to just select all the items in it. My software Visual Studio 2008 crystal report v11 My issue was I wanted to add crystal report to a form and show…
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…
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…

734 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