systemtap support arm?

[Jovi Zhang]

Hi,

This is my first contact systemtap@sourceware.org, I have a question
about uprobe support in systemtap of ARM architecture.

I got this from NEWS:

- arm now have a uprobes port which enables user probes. This still
  requires some kernel patches (user_regsets and tracehook support for arm).

But there don't have arm uprobe porting in Linux kernel mainline right
now(only x86), so where is this arm uprobes kernel part? Thanks.

.jovi