On Tue, Nov 28, 2017 at 7:20 AM, Tobin C. Harding <m...@tobin.cc> wrote: > > Noob question: how do we _know_ this. In other words how do we know no > userland tools rely on the current behaviour? No stress to answer Kees, > this is a pretty general kernel dev question.
Perhaps I'm reading this wrong, but anyway: besides ftrace, kprobes will require a symbol-to-address lookup. Specifically, in the function kprobe_lookup_name() which in turn invokes kallsyms_lookup_name(). AFAIK, SystemTap (userland) is built on top of the kprobes infrastructure.. thanks, Kaiwan.
