Patrice Mandin a écrit :
In _aes_trap() function defined in gemlib/gem_aesP.h, a0 register is not listed in the clobbered register list, and thus the compiler is not aware of this register changing its value when calling the trap #2.
This was a big problem, because of that wrong register the memory was overwritten randomly when calling some GEM functions. I didn't noticed it because I have very few examples of GEM programs, and I don't know much GEM myself. GCC 4.x uses registers a lot to store intermediate values, even across function calls. Fortunately, I believe that no much GEM programs have been compiled with GCC 4.x and distributed, so it should not be a problem.
I don't know if that bug had effects for programs compiled with GCC 2.95... I hope it is not the case.
You can find the updated GemLib patch on my website. http://vincent.riviere.free.fr/soft/m68k-atari-mint/ -- Vincent Rivière