RE: Data Execution Protection and Regsvr32

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So, I disabled some startup code and was able to boot up Windows with the DEP
option set to AlwaysOn and now my program to register the filter fails to
load the component. When I try to load the cv.dll directly by regsvr32, this
is what the output window display in VisualStudio 6. I guess I'm wondering
how to fix the DEP problem in OpenCV when the problem happens even before the
DllMain is executed.

Loaded 'C:\windows\system32\regsvr32.exe', no matching symbolic information
found.
Loaded 'ntdll.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\kernel32.dll', no matching symbolic information
found.
Loaded 'C:\WINDOWS\system32\msvcrt.dll', no matching symbolic information
found.
Loaded 'C:\WINDOWS\system32\advapi32.dll', no matching symbolic information
found.
Loaded 'C:\WINDOWS\system32\rpcrt4.dll', no matching symbolic information
found.
Loaded 'C:\WINDOWS\system32\user32.dll', no matching symbolic information
found.
Loaded 'C:\WINDOWS\system32\gdi32.dll', no matching symbolic information
found.
Loaded 'C:\WINDOWS\system32\ole32.dll', no matching symbolic information
found.
Loaded 'C:\WINDOWS\system32\shimeng.dll', no matching symbolic information
found.
Loaded 'C:\WINDOWS\AppPatch\AcGenral.dll', no matching symbolic information
found.
Loaded 'C:\WINDOWS\system32\winmm.dll', no matching symbolic information
found.
Loaded 'C:\WINDOWS\system32\oleaut32.dll', no matching symbolic information
found.
Loaded 'C:\WINDOWS\system32\msacm32.dll', no matching symbolic information
found.
Loaded 'C:\WINDOWS\system32\version.dll', no matching symbolic information
found.
Loaded 'C:\WINDOWS\system32\shell32.dll', no matching symbolic information
found.
Loaded 'C:\WINDOWS\system32\shlwapi.dll', no matching symbolic information
found.
Loaded 'C:\WINDOWS\system32\userenv.dll', no matching symbolic information
found.
Loaded 'C:\WINDOWS\system32\uxtheme.dll', no matching symbolic information
found.
Loaded
'C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.2600.2180_x-ww_a84f1ff9\comctl32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\comctl32.dll', no matching symbolic information
found.
Loaded symbols for 'C:\WINDOWS\system32\MSVCRTD.DLL'
First-chance exception in regsvr32.exe (CVD.DLL): 0xC0000005: Access
Violation.
The thread 0xEF0 has exited with code 3 (0x3).
The program 'C:\windows\system32\regsvr32.exe' has exited with code 3 (0x3).

Thanks in advance for any suggestions,
Steve





"Stephen Ing" wrote:

> I'm trying to install a DirectShow filter that is statically linked to cv.dll
> (OpenCV http://sourceforge.net/projects/opencv/). When I run my *.msi
> installer, I get the following error message when it get's to registering my
> filter.
>
> "Module c:\Program Files\...\mycomponent.ax failed to register. HRESULT
> -2147023898. Contact your support personel."
>
> When I try to register the component manually using regsvr32.exe, I get:
>
> "LoadLibrary("...\mycomponent.ax") failed - Invalid access to memory location"
>
> I know this problem is related to DEP and can make it go away by turning off
> the DEP but I would like to leave the DEP on for obvious reasons.
>
> So, I started investigating this problem and this is what I found:
>
> 1. I tried to debug the cv.dll to see where the problem might be occuring
> and I set a breakpoint in the DllMain and launched it in debug mode with
> regsvr32 as the debug exe but it never hits the DllMain. It never hits the
> DllRegisterServer entry point in my filter either. But it does give me the
> error I mentioned above.
>
> 2. I wrote my own program which I am pasting at the bottom of my message to
> register my own filter and it registers it successfully.
>
> So what is regsvr32 doing that my program isn't? Or is my program simply
> not being monitored for DEP. My boot.ini setting is OptIn. If set it to
> AlwaysOn, I can't even get to the login screen.
>
> Does anyone have any ideas?
>
> Thanks,
> Steve
>
> // RegFilt.cpp : Defines the entry point for the application.
> //
>
> #define WIN32_LEAN_AND_MEAN // Exclude rarely-used stuff from Windows headers
>
> #include <windows.h>
>
> void NoDLLSpecified()
> {
> MessageBox(NULL, "No DLL Name Specified.\n\n"
> "Usage: RegFilt [/u] dllname\n"
> "/u - Unregister Server\n"
> "/s - Silent; display no message boxes",
> "RegFilt",
> MB_OK|MB_ICONEXCLAMATION);
> }
>
> void LoadLibraryFailed(LPCTSTR szName)
> {
> char szMsg[255];
>
> wsprintf(szMsg, "LoadLibrary(\"%s\") failed - The specified module could
> not be found.", szName);
>
> MessageBox(NULL, szMsg,
> "RegFilt",
> MB_OK|MB_ICONEXCLAMATION);
> }
>
> int APIENTRY WinMain(HINSTANCE hInstance,
> HINSTANCE hPrevInstance,
> LPSTR lpCmdLine,
> int nCmdShow)
> {
> typedef HRESULT (__stdcall * fpEntryPoint)();
>
> fpEntryPoint fp;
>
> char szMsg[255];
>
> int offset=0;
>
> bool bUnreg=false;
> bool bSilent=false;
>
> if (lpCmdLine[0] == 0) {
> NoDLLSpecified();
> return -1;
> }
>
> while (lpCmdLine[offset] == '/') {
> if (!strnicmp(lpCmdLine+offset, "/u ", 2))
> bUnreg = true;
>
> if (!strnicmp(lpCmdLine+offset, "/s ", 2))
> bSilent = true;
>
> int len = strlen(lpCmdLine+offset);
>
> if (len >= 2)
> offset += 2;
> else
> offset += len;
>
> while (lpCmdLine[offset] == ' ')
> offset++;
> }
>
> if (lpCmdLine[offset] == 0) {
>
> if (!bSilent)
> NoDLLSpecified();
>
> return -1;
>
> }
>
> if (bUnreg) {
>
> char* token = strtok(lpCmdLine+offset, "\"");
>
> if (token) {
>
> HINSTANCE hInst = LoadLibrary(token);
>
> if (!hInst) {
>
> if (!bSilent)
> LoadLibraryFailed(token);
>
> return -1;
> }
>
> fp = (fpEntryPoint)GetProcAddress(hInst, "DllUnregisterServer");
>
> if (SUCCEEDED(fp())) {
>
> wsprintf(szMsg, "DllUnregisterServer in %s succeeded.", token);
>
> if (!bSilent)
> MessageBox(NULL, szMsg, "RegFilt", MB_OK|MB_ICONINFORMATION);
>
> }
>
> } else
> NoDLLSpecified();
> } else {
> char* token = strtok(lpCmdLine+offset, "\"");
>
> HINSTANCE hInst = LoadLibrary(token);
>
> if (!hInst) {
>
> if (!bSilent)
> LoadLibraryFailed(token);
>
> return -1;
>
> }
>
> fp = (fpEntryPoint)GetProcAddress(hInst, "DllRegisterServer");
>
> if (SUCCEEDED(fp())) {
>
> wsprintf(szMsg, "DllRegisterServer in %s succeeded.", token);
>
> if (!bSilent)
> MessageBox(NULL, szMsg, "RegFilt", MB_OK|MB_ICONINFORMATION);
>
> }
> }
>
> return 0;
> }
>
>
.

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