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Unloading Driver in WinDbg
OSR_Community_User-158
Member Posts: 6
in WINDBG
Hello,
My Win2K Bus Driver seems to hang the target system when it boots up. Is
there any way I can unload my driver using WinDbg, so as to enable the
target system to boot properly ?
Thanks!
Puja
My Win2K Bus Driver seems to hang the target system when it boots up. Is
there any way I can unload my driver using WinDbg, so as to enable the
target system to boot properly ?
Thanks!
Puja
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Comments
1. enable initial breakpoint in WnDbg;
2. when it breaks in, set a breakpoint at your DriverEntry routine;
bp MyDriver.SYS!DriverEntry
3. when it breaks there step thru (pro'lly you do nothing there but fill in
structs) and upon exit from it set
EAX=0xC0000099
That'l tell the system not to leave the driver alone for this session.
Later, you can go to Device Manager and remove the device (or delete the
driver)
-----
Alternatively, try booting in safe mode (F8 at start) and delete your SYS
file from disk.
(This is what I'd do first!!!)
-----
Ilko Dossev
SR Sw Eng
Intelligraphics, Inc.
----- Original Message -----
From: <[email protected]>
To: "Kernel Debugging Interest List" <[email protected]>
Sent: Friday, May 12, 2000 6:55 PM
Subject: [windbg] Unloading Driver in WinDbg
> Hello,
>
> My Win2K Bus Driver seems to hang the target system when it boots up. Is
> there any way I can unload my driver using WinDbg, so as to enable the
> target system to boot properly ?
>
> Thanks!
> Puja
>
> ---
> You are currently subscribed to windbg as: [email protected]
> To unsubscribe send a blank email to $subst('Email.Unsub')
>
My driver is a Win2K driver but not WDM (I donot include "wdm.h" file
anywhere).
So does it mean the technique you describe below will not work for me ?
Thanks
Puja
On 05/12/00, ""Ilko Dossev" " wrote:
> If it is WDM, you can do the following:
>
> 1. enable initial breakpoint in WnDbg;
> 2. when it breaks in, set a breakpoint at your DriverEntry routine;
> bp MyDriver.SYS!DriverEntry
> 3. when it breaks there step thru (pro'lly you do nothing there but fill in
> structs) and upon exit from it set
> EAX=0xC0000099
>
> That'l tell the system not to leave the driver alone for this session.
>
> Later, you can go to Device Manager and remove the device (or delete the
> driver)
>
> -----
>
> Alternatively, try booting in safe mode (F8 at start) and delete your SYS
> file from disk.
> (This is what I'd do first!!!)
>
> -----
>
> Ilko Dossev
> SR Sw Eng
> Intelligraphics, Inc.
>
>
> ----- Original Message -----
> From:
> To: "Kernel Debugging Interest List"
> Sent: Friday, May 12, 2000 6:55 PM
> Subject: [windbg] Unloading Driver in WinDbg
>
>
> > Hello,
> >
> > My Win2K Bus Driver seems to hang the target system when it boots up. Is
> > there any way I can unload my driver using WinDbg, so as to enable the
> > target system to boot properly ?
> >
> > Thanks!
> > Puja
> >
> > ---
> > You are currently subscribed to windbg as: [email protected]
> > To unsubscribe send a blank email to $subst('Email.Unsub')
> >
Profile and the system booted fine. Is this what you are referring to as
"safe mode" or is it different ?
Thanks a lot!
Puja
> Alternatively, try booting in safe mode (F8 at start) and delete your SYS
> file from disk.
> (This is what I'd do first!!!)
>
> -----
>
> Ilko Dossev
> SR Sw Eng
> Intelligraphics, Inc.
>
>
> ----- Original Message -----
> From:
> To: "Kernel Debugging Interest List"
> Sent: Friday, May 12, 2000 6:55 PM
> Subject: [windbg] Unloading Driver in WinDbg
>
>
> > Hello,
> >
> > My Win2K Bus Driver seems to hang the target system when it boots up. Is
> > there any way I can unload my driver using WinDbg, so as to enable the
> > target system to boot properly ?
> >
> > Thanks!
> > Puja
> >
> > ---
> > You are currently subscribed to windbg as: [email protected]
> > To unsubscribe send a blank email to $subst('Email.Unsub')
> >
DriverEntry is *mandatory* export for WDM drivers.
If it returns FALSE, no more processing, no more calls, no GPFs.
(I use to do that myself, that's why I keep DriverEntry as simple as
possible)
Ilko
----- Original Message -----
From: <[email protected]>
To: "Kernel Debugging Interest List" <[email protected]>
Sent: Monday, May 15, 2000 1:00 PM
Subject: [windbg] Re: Unloading Driver in WinDbg
> Hello,
>
> My driver is a Win2K driver but not WDM (I donot include "wdm.h" file
> anywhere).
> So does it mean the technique you describe below will not work for me ?
>
> Thanks
> Puja
>
> On 05/12/00, ""Ilko Dossev" <[email protected]>" wrote:
> > If it is WDM, you can do the following:
> >
> > 1. enable initial breakpoint in WnDbg;
> > 2. when it breaks in, set a breakpoint at your DriverEntry routine;
> > bp MyDriver.SYS!DriverEntry
> > 3. when it breaks there step thru (pro'lly you do nothing there but fill
in
> > structs) and upon exit from it set
> > EAX=0xC0000099
> >
> > That'l tell the system not to leave the driver alone for this session.
> >
> > Later, you can go to Device Manager and remove the device (or delete the
> > driver)
> >
> > -----
> >
> > Alternatively, try booting in safe mode (F8 at start) and delete your
SYS
> > file from disk.
> > (This is what I'd do first!!!)
> >
> > -----
> >
> > Ilko Dossev
> > SR Sw Eng
> > Intelligraphics, Inc.
> >
> >
> > ----- Original Message -----
> > From: <[email protected]>
> > To: "Kernel Debugging Interest List" <[email protected]>
> > Sent: Friday, May 12, 2000 6:55 PM
> > Subject: [windbg] Unloading Driver in WinDbg
> >
> >
> > > Hello,
> > >
> > > My Win2K Bus Driver seems to hang the target system when it boots up.
Is
> > > there any way I can unload my driver using WinDbg, so as to enable the
> > > target system to boot properly ?
> > >
> > > Thanks!
> > > Puja
> > >
> > > ---
> > > You are currently subscribed to windbg as: [email protected]
> > > To unsubscribe send a blank email to $subst('Email.Unsub')
> > >
>
> ---
> You are currently subscribed to windbg as: [email protected]
> To unsubscribe send a blank email to $subst('Email.Unsub')
>
and peripherals and VGA.
Glad to read that you succeeded!
Ilko
----- Original Message -----
From: <[email protected]>
To: "Kernel Debugging Interest List" <[email protected]>
Sent: Monday, May 15, 2000 1:33 PM
Subject: [windbg] Re: Unloading Driver in WinDbg
>
> Thank you much, I pressed F8 and chose the option to Boot with Last Good
HW
> Profile and the system booted fine. Is this what you are referring to as
> "safe mode" or is it different ?
>
> Thanks a lot!
> Puja
>
>
> > Alternatively, try booting in safe mode (F8 at start) and delete your
SYS
> > file from disk.
> > (This is what I'd do first!!!)
> >
> > -----
> >
> > Ilko Dossev
> > SR Sw Eng
> > Intelligraphics, Inc.
> >
> >
> > ----- Original Message -----
> > From: <[email protected]>
> > To: "Kernel Debugging Interest List" <[email protected]>
> > Sent: Friday, May 12, 2000 6:55 PM
> > Subject: [windbg] Unloading Driver in WinDbg
> >
> >
> > > Hello,
> > >
> > > My Win2K Bus Driver seems to hang the target system when it boots up.
Is
> > > there any way I can unload my driver using WinDbg, so as to enable the
> > > target system to boot properly ?
> > >
> > > Thanks!
> > > Puja
> > >
> > > ---
> > > You are currently subscribed to windbg as: [email protected]
> > > To unsubscribe send a blank email to $subst('Email.Unsub')
> > >
>
> ---
> You are currently subscribed to windbg as: [email protected]
> To unsubscribe send a blank email to $subst('Email.Unsub')
>