Matt Mackall wrote:
On Mon, 2008-02-11 at 15:01 -0800, H. Peter Anvin wrote:
Matt Mackall wrote:
Best would be to have no ifdefs and do it all with linker magic, of
course. But that's trickier.
I concur with this, definitely.
Ok, so let's come up with a plan. We can:
a) use weak symbols, ala cond_syscall
b) use a special section
c) use early_init code (is it early enough?)
c) have some sort of registration list
Having a generic cond_call of some sort might be nice for this sort of
thing.
c) is out, because this has to be executed after the early generic code
and before the late generic code.
b) would be my first choice, and yes, it would be a good thing to have a
generalized mechanism for this. For the registrant, it's pretty easy:
just add a macro that adds a pointer to a named section. We then need a
way to get the base address and length of each such section in order to
be able to execute each function in sequence.
-hpa
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