On Thu, 30 May 2019 18:29:20 +0900
Masami Hiramatsu wrote:
> > OK, so this series isn't enough to allow kretprobes to use it yet. OK,
> > I plan on still keeping it because it does allow for placing function
> > graph tracer into instances with their own filters.
>
> OK, that will be a "regs"
On Wed, 29 May 2019 05:25:21 -0400
Steven Rostedt wrote:
> On Wed, 29 May 2019 15:47:40 +0900
> Masami Hiramatsu wrote:
>
>
> > Hi Steve,
> >
> > I found that these interfaces seem tightly coupled with fgraph_ops. But that
> > cause a problem when I'm using it from kretprobe.
>
> I was think
On Wed, 29 May 2019 15:47:40 +0900
Masami Hiramatsu wrote:
> Hi Steve,
>
> I found that these interfaces seem tightly coupled with fgraph_ops. But that
> cause a problem when I'm using it from kretprobe.
I was thinking that the kretprobes could use the fgraph_ops like
kprobes uses ftrace_ops.
On Wed, 22 May 2019 10:40:27 -0400
Steven Rostedt wrote:
> On Wed, 22 May 2019 23:19:55 +0900
> Masami Hiramatsu 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
On Wed, 22 May 2019 23:19:55 +0900
Masami Hiramatsu 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
On Mon, 20 May 2019 10:20:01 -0400
Steven Rostedt wrote:
>
> The background for this is explained in the V1 version found here:
>
> http://lkml.kernel.org/r/20181122012708.491151...@goodmis.org
>
> The TL;DR; is this:
>
> The function graph tracer required a rewrite, mainly because it
> ca
The background for this is explained in the V1 version found here:
http://lkml.kernel.org/r/20181122012708.491151...@goodmis.org
The TL;DR; is this:
The function graph tracer required a rewrite, mainly because it
can only allow one callback registered at a time. The main motivation
for thi
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