Re: extending callbacks?

[Matthias Scheidegger]

Hi Eric,

> The general case requires self modifying code.  Where do you need this in the
> kernel.  For most callbacks the kernel is already passing a fairly generic
> parameter you can use.  So this trick should be unnecessary.

In my case the problem is indeed fairly general, so I can't seem to count on a
generic parameter. Most callbacks do have them, but not all of them.

Anyway, since you agree the general case requires self modifying code I'll do it
that way. Now I just need to know how to make a page executable in a portable
way (get_free_page on i386 already returns executable pages...)

If anyone's interested in the background of this:
I'm writing a kernel module containing an interpreter for the Python language,
which in turn accesses the kernel functions through a wrapper layer. This
makes writing kernel modules in pure Python possible. I know this is rather sick :)

cheers

Matthias