Re: [RFC PATCH v2 0/6] bpf: fprobe: rethook: Use ftrace_regs instead of pt_regs

[Florent Revest]

On Mon, Aug 7, 2023 at 8:48 AM Masami Hiramatsu (Google)
<mhiramat@xxxxxxxxxx> wrote:
>
> Florent, feel free to add your rethook for arm64, but please do not remove
> kretprobe trampoline yet. It is another discussion point. We may be possible
> to use ftrace_regs for kretprobe by ftrace_partial_regs() but kretprobe
> allows nest probe. (maybe we can skip that case?)

Ack :)

>  arch/Kconfig                    |    1 +
>  arch/arm64/include/asm/ftrace.h |   11 ++++++
>  arch/loongarch/Kconfig          |    1 +
>  arch/s390/Kconfig               |    1 +
>  arch/x86/Kconfig                |    1 +
>  arch/x86/kernel/rethook.c       |    9 +++--
>  include/linux/fprobe.h          |    4 +-
>  include/linux/ftrace.h          |   56 ++++++++++++++++++-----------
>  include/linux/rethook.h         |   11 +++---
>  kernel/kprobes.c                |    9 ++++-
>  kernel/trace/Kconfig            |    9 ++++-
>  kernel/trace/bpf_trace.c        |   14 +++++--
>  kernel/trace/fprobe.c           |    8 ++--
>  kernel/trace/rethook.c          |   16 ++++----
>  kernel/trace/trace_fprobe.c     |   76 ++++++++++++++++++++++++---------------
>  kernel/trace/trace_probe_tmpl.h |    2 +
>  lib/test_fprobe.c               |   10 +++--
>  samples/fprobe/fprobe_example.c |    4 +-

I believe that Documentation/trace/fprobe.rst should also be modified
following the API change