Re: [RFC][PATCH 00/14 v2] function_graph: Rewrite to allow multiple users
From: Steven Rostedt
Date: Wed May 22 2019 - 10:43:20 EST
On Wed, 22 May 2019 23:19:55 +0900
Masami Hiramatsu <mhiramat@xxxxxxxxxx> wrote:
> > void *fgraph_reserve_data(int size_in_bytes)
> >
> > Allows the entry function to reserve up to 4 words of data on
> > the shadow stack. On success, a pointer to the contents is returned.
> > This may be only called once per entry function.
> >
> > void *fgraph_retrieve_data(void)
> >
> > Allows the return function to retrieve the reserved data that was
> > allocated by the entry function.
>
> Nice! this seems good for kretprobe too. I'll review and try to port
> kretprobe on this framework.
If you rather pull from my git repo and not download all the patches,
they are currently available in my ftrace/fgraph-multi branch.
-- Steve