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SubjectRe: [PATCH tip/master 1/3] kprobes: Support blacklist functions in module


* Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> wrote:

> For some symbols we can do that. But it can conflict with other __section
> attributes e.g. __sched, since a function must be placed in only one
> section. [...]

The the scheduler is not modular, so __sched should not be a problem in itself.

> [...] So, IMHO, using section for expressing its attribute is not a good idea,
> but I couldn't find another option in common function attribute.
>
> https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#Common-Function-Attributes
>
> Thus I've introduced NOKPROBE_SYMBOL macro which stores the target function
> addresses (not the function itself) in the _kprobe_blacklist section.

So the question is, in which cases do modules need this?

Thanks,

Ingo


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