Infinite loop with translation DLL

[Uwe Bonnes]

Hello,

around July 2009, I implemented a translation dll, allowing to run Win32
programms using ftd2xx.dll with Wine translating the calls to
linux-libftd2xx. It was done while looking at dll/glu32.

I was able to run mprog.exe (www.ftdichip.org) some time ago. Reapplying
now, I hit an infinite loop with the first translated call.

I short, ftd2xx.spec contains:

@ stdcall FT_ListDevices(ptr ptr long) FTD2XX_FT_ListDevices

and ftd2xx_main.c:

extern FT_STATUS FT_ListDevices(PVOID, PVOID, DWORD);
FT_STATUS WINAPI FTD2XX_FT_ListDevices(
        PVOID pArg1,
        PVOID pArg2,
        DWORD Flags
        )
{
  FT_STATUS res = FT_ListDevices(pArg1, pArg2, Flags);
  TRACE("res %s\n",  res2string(res));
  return res;
}

and dlls/ftd2xx/Makefile.in contains:
EXTRALIBS = @FTD2XXLIBS@

with EXTRALIBS detected in configure.ac.

MProig.exe calls  FT_ListDevices(), which is resolves as
FTD2XX_FT_ListDevices(). Then
FTD2XX_FT_ListDevices() is entered and FT_ListDevices() resolves again to
FTD2XX_FT_ListDevices(), resulting in an infinite loop.

Can anybody help with the flaw in my implementation? Or did anything change
in wine?

The patches still linger on the mailing-list as "Stub implementation for ftd2xx.dll"

Thanks

[Henri Verbeet]

2009/11/9 Uwe Bonnes :
> Can anybody help with the flaw in my implementation? Or did anything change
> in wine?

I'm not sure if anything changed there recently, or if that's even
supposed to work, but I suppose that one way to solve the problem
would be to load the linux library dynamically with wine_dlopen() and
explicitly load the entry points with wine_dlsym().

[Uwe Bonnes]

> > > > > "Henri" == Henri Verbeet  writes:

Henri> 2009/11/9 Uwe Bonnes :
    >> Can anybody help with the flaw in my implementation? Or did anything
    >> change in wine?
    >> 
    Henri> I'm not sure if anything changed there recently, or if that's
    Henri> even supposed to work, but I suppose that one way to solve the
    Henri> problem would be to load the linux library dynamically with
    Henri> wine_dlopen() and explicitly load the entry points with
    Henri> wine_dlsym().

I wonder how it works in dll/glu32 or what is different in my approach?

Marcus: Do you have an example that uses dll/glu32?

[Marcus Meissner]

On Mon, Nov 09, 2009 at 04:53:31PM +0100, Uwe Bonnes wrote:
> > > > > > "Henri" == Henri Verbeet  writes:
> Henri> 2009/11/9 Uwe Bonnes <[e-mail]>:
> >> Can anybody help with the flaw in my implementation? Or did anything
> >> change in wine?
> >> 
> Henri> I'm not sure if anything changed there recently, or if that's
> Henri> even supposed to work, but I suppose that one way to solve the
> Henri> problem would be to load the linux library dynamically with
> Henri> wine_dlopen() and explicitly load the entry points with
> Henri> wine_dlsym().
>
> I wonder how it works in dll/glu32 or what is different in my approach?
>
> Marcus: Do you have an example that uses dll/glu32?

No, I dont know.

I have not used for years :/

Ciao, Marcus