Improve Kprobe with symbol table to provide real dynamic tracing

[louisom]

At this moment, f9-kernel Kprobe approach was using function address in kernel,
we can saw it at kernel/sampling-kdb.c for the example.

Compare to Linux kernel Kprobe, it was using symbol name for user space program to insert the kprobe into kernel:

struct kprobe kp = {
    .symbol_name    = "_do_fork",
};

After reviewing, f9-kernel already provide the infrastructure ksym for this approach, we can take time and improve Kprobe for real dynamic tracing in user space.

[ab1aw]

Hello, Has any work been done in this area - perhaps on one of the forks? Thank you.