[cffi-devel] vararg / New foreign library interface

[Hoehle, Joerg-Cyril]

Luís Oliveira wrote:
>Allegro resets the stack pointer to whatever value it had before  
>pushing the foreign call's arguments to the stack. This approach  
>works for either stdcall or cdecl.
I forgot this other issue:
This approach is good enough for Lisp to C. But what about callbacks, i.e. C to Lisp?
Do you know how a foreign function would react when returned an unexpected stack pointer?  gcc -fno-omit-frame-pointer helps around this, but is not general.

Without a hint, one simply doesn't know what calling convention the foreign caller expects.  Clean up the stack or not, that is the question.

Regards,
	Jörg Höhle.