Re: [PATCH 2/2] recordmcount: Handle sections with no non-weak symbols

Christophe Leroy
2022-05-02T14:45:02Z

Le 28/04/2022 à 16:06, Steven Rostedt a écrit :
> On Thu, 28 Apr 2022 13:15:22 +0530
> "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com> wrote:
>
>> Indeed, plain old -pg will be a problem. I'm not sure there is a generic
>> way to address this. I suppose architectures will have to validate the
>> mcount locations, something like this?
>
> Perhaps another solution is to make the mcount locations after the linking
> is done. The main downside to that is that it takes time to go over the
> entire vmlinux, and will slow down a compile that only modified a couple of
> files.
>

If we do that after the linking, won't it be a nightmare with the
trampolines installed by the linker when the destination is over the 24
bits limit ?

Christophe