Re: [PATCH 4/4] arm64: implement KPROBES_ON_FTRACE

[Naveen N. Rao]

Jisheng Zhang wrote:
> This patch implements KPROBES_ON_FTRACE for arm64.
>
> ~ # mount -t debugfs debugfs /sys/kernel/debug/
> ~ # cd /sys/kernel/debug/
> /sys/kernel/debug # echo 'p _do_fork' > tracing/kprobe_events
>
> before the patch:
>
> /sys/kernel/debug # cat kprobes/list
> ffffff801009ff7c  k  _do_fork+0x4    [DISABLED]

This looks wrong -- we should not be allowing kprobe to be registered on 
ftrace address without KPROBES_ON_FTRACE. Is _do_fork+0x4 the location 
of ftrace entry on arm64?

- Naveen