On 22 Dec 2011, at 17:18, Sven Barth wrote:

Am 22.12.2011 17:04, schrieb Jonas Maebe:

Closed source code should be compiled with a compiler that respects the
ABI by default. I guess most of it is compiled with Microsoft Visual
Studio, which does presumably does that. I don't think that any compiler other than GCC can create code for Win32 that assumes a 16-byte aligned
stack.

My mysterious OpenCV problems are with the MSVC version of the libraries...

Then the problem is probably something different.

Then you would have to add this to all routines that may (directly or
indirectly)

*call*

a routine from a broken library.

Wouldn't it be sufficient to align the stack when calling a routine from such a library? (sorry for sounding naive here, but the requirements for stack alignment still puzzle me a bit)

Keeping an aligned stack requires completely different code generation inside the calling routine, you can't implement that on a call-by-call basis.


Jonas
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