perf/probes: Update Documentation/perf-probe.txt

Update Documentation/perf-probe.txt accoding to recent
syntax changes.

Signed-off-by: Masami Hiramatsu <[email protected]>
Acked-by: Frederic Weisbecker <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Jim Keniston <[email protected]>
Cc: Ananth N Mavinakayanahalli <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Frank Ch. Eigler <[email protected]>
Cc: Jason Baron <[email protected]>
Cc: K.Prasad <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Srikar Dronamraju <[email protected]>
LKML-Reference: <20091104001212.3454.19415.stgit@harusame>
Signed-off-by: Ingo Molnar <[email protected]>

Author: Masami Hiramatsu

tools/perf/Documentation/perf-probe.txt

@@ -8,7 +8,9 @@ perf-probe - Define new dynamic tracepoints
 SYNOPSIS
 --------
 [verse]
-'perf probe' [-k <file>] -P 'PROBE' [-P 'PROBE' ...]
+'perf probe' [options] --add 'PROBE' [--add 'PROBE' ...]
+or
+'perf probe' [options] 'PROBE' ['PROBE' ...]
 
 
 DESCRIPTION
@@ -21,26 +23,25 @@ and C local variables) with debuginfo.
 OPTIONS
 -------
 -k::
---vmlinux::
+--vmlinux=PATH::
 	Specify vmlinux path which has debuginfo (Dwarf binary).
 
 -v::
 --verbose::
         Be more verbose (show parsed arguments, etc).
 
--P::
---probe::
+-a::
+--add::
 	Define a probe point (see PROBE SYNTAX for detail)
 
 PROBE SYNTAX
 ------------
 Probe points are defined by following syntax.
 
- "TYPE:[GRP/]NAME FUNC[+OFFS][@SRC]|@SRC:LINE [ARG ...]"
+ "FUNC[+OFFS|:RLN|%return][@SRC]|SRC:ALN [ARG ...]"
 
-'TYPE' specifies the type of probe point, you can use either "p" (kprobe) or "r" (kretprobe) for 'TYPE'. 'GRP' specifies the group name of this probe, and 'NAME' specifies the event name. If 'GRP' is omitted, "kprobes" is used for its group name.
-'FUNC' and 'OFFS' specifies function and offset (in byte) where probe will be put. In addition, 'SRC' specifies a source file which has that function (this is mainly for inline functions).
-You can specify a probe point by the source line number by using '@SRC:LINE' syntax, where 'SRC' is the source file path and 'LINE' is the line number.
+'FUNC' specifies a probed function name, and it may have one of the following options; '+OFFS' is the offset from function entry address in bytes, 'RLN' is the relative-line number from function entry line, and '%return' means that it probes function return. In addition, 'SRC' specifies a source file which has that function.
+It is also possible to specify a probe point by the source line number by using 'SRC:ALN' syntax, where 'SRC' is the source file path and 'ALN' is the line number.
 'ARG' specifies the arguments of this probe point. You can use the name of local variable, or kprobe-tracer argument format (e.g. $retval, %ax, etc).
 
 SEE ALSO