On Thu, 28 Feb 2019 16:00:55 +0900
Masami Hiramatsu wrote:
> >
> > "+u0(%si):string will read a string from the address in the register
> > %si that is expected to be in user-space. 'ustring' is a shortcut way
> > off performing the same task. That is, +0(%si):ustring is equivalent
> > to +u0
Hi Steve,
Thank you for the review.
On Wed, 27 Feb 2019 21:31:32 -0500
Steven Rostedt wrote:
> On Wed, 27 Feb 2019 23:44:42 +0900
> Masami Hiramatsu wrote:
>
> >
> > +.. _user_mem_access:
> > +User Memory Access
> > +--
> > +Kprobe events supports user-space memory access. F
On Wed, 27 Feb 2019 21:42:45 -0500
Steven Rostedt wrote:
> On Wed, 27 Feb 2019 23:44:42 +0900
> Masami Hiramatsu wrote:
>
> > diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c
> > index a7012de37a00..0efef172db17 100644
> > --- a/kernel/trace/trace_probe.c
> > +++ b/kernel/tr
On Wed, 27 Feb 2019 23:44:42 +0900
Masami Hiramatsu wrote:
> diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c
> index a7012de37a00..0efef172db17 100644
> --- a/kernel/trace/trace_probe.c
> +++ b/kernel/trace/trace_probe.c
> @@ -239,6 +239,7 @@ parse_probe_arg(char *arg, const
On Wed, 27 Feb 2019 23:44:42 +0900
Masami Hiramatsu wrote:
>
> +.. _user_mem_access:
> +User Memory Access
> +--
> +Kprobe events supports user-space memory access. For that purpose, you can
> use
> +either user-space dereference syntax or 'ustring' type.
> +
> +user-space dere
Support user-space dereference syntax for probe event arguments
to dereference the data-structure or array in user-space.
The syntax is just adding 'u' before an offset value.
+|-u()
e.g. +u8(%ax), +u0(+0(%si))
For example, if you probe do_sched_setscheduler(pid, policy,
param) and record para
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