Robert Kern schrieb:
dcharno wrote:
Is it possible to use ctypes with a shared library which uses MMX/SSE
intrinsics? I can load the library and access functions inside it,
but I getting a seg fault when I hit one of the intrinsics. I'm
wondering if there might be some sort of stack alignment problem.
I am using gcc version 4.2.3 and Python 2.5.2 on Ubuntu 8.04.
Any suggestions would be helpful.
Well, stack alignment would be a problem with how the shared library
gets compiled, nothing to do with ctypes (I think). However, if you are
passing in arrays from ctypes, *they* may also be misaligned. Try to
check the addresses of the ctypes values you are passing in. I'm not
entirely sure how to do that, though.
there is the addressof-function. If this is really the problem, it
should be possible to allocate data + margin (e.g. c_int-arrays), and
cast the proper aligned address via from_address.
Diez
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