[MPlayer-dev-eng] Re: [PATCH] [RFC] fix GetModuleHandle(0)

[Martin Simmons]

>>>>> On Sun, 18 Mar 2007 14:23:12 -0700, Alan Nisota said:
> Martin Simmons wrote:
> >>>>>> On Sun, 18 Mar 2007 12:20:44 -0700, Alan Nisota said:
> >> I am trying to fix GetModuleHanldeA(0) to return the base address of the 
> >> calling DLL (in general this should be the base address of the filter 
> >> we've loaded.  What I really want is the address returned by 
> >> LoadLibraryExA, but I'm not sure how I can get at it from this context. 
> > 
> > That doesn't sound right to me -- it should return the handle of the main
> > executable.
> I read MSDN and wasn't sure exactly what 'a handle to the file used to 
> create the calling process' meant.  I guess I guessed wrong.
> 
> >> applied).  It is obviously wrong, but is a band-aid until I can figure 
> >> out the right way to fix this.
> > 
> > The right way probably depends on what CoreAVC does with the value.
> Maybe not much, since feeding it 0x1000000 (which is the address where 
> CoreAVC is loaded) works. Perhaps I could create a dummy stub to return 
> in this case.  I don't know what is supposed to be in memory at the 
> beginning of the file handle though.  Do you know if this is supposed to 
> be mapped to a structure?

The memory contains bytes from the start of the EXE file, but the handle is
opaque so code shouldn't depend on the memory contents or any particular
non-zero value.

I wonder why the old value 1 didn't work?  It might be worth trying 0x129
(i.e. the next value like MODULE_HANDLE_winmm).

__Martin