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Commit 306cfe20 authored by Namhyung Kim's avatar Namhyung Kim Committed by Steven Rostedt
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tracing/uprobes: Fix documentation of uprobe registration syntax 



The uprobe syntax requires an offset after a file path not a symbol.

Reviewed-by: default avatarMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Acked-by: default avatarOleg Nesterov <oleg@redhat.com>
Acked-by: default avatarSrikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
parent d8a30f20

Documentation/trace/uprobetracer.txt

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Original line number Diff line number Diff line
@@ -19,15 +19,15 @@ user to calculate the offset of the probepoint in the object. 


Synopsis of uprobe_tracer

-------------------------

  p[:[GRP/]EVENT] PATH:SYMBOL[+offs] [FETCHARGS] : Set a uprobe

  r[:[GRP/]EVENT] PATH:SYMBOL[+offs] [FETCHARGS] : Set a return uprobe (uretprobe)

  p[:[GRP/]EVENT] PATH:OFFSET [FETCHARGS] : Set a uprobe

  r[:[GRP/]EVENT] PATH:OFFSET [FETCHARGS] : Set a return uprobe (uretprobe)

  -:[GRP/]EVENT                           : Clear uprobe or uretprobe event



  GRP           : Group name. If omitted, "uprobes" is the default value.

  EVENT         : Event name. If omitted, the event name is generated based

                  on SYMBOL+offs.

                  on PATH+OFFSET.

  PATH          : Path to an executable or a library.

  SYMBOL[+offs] : Symbol+offset where the probe is inserted.

  OFFSET        : Offset where the probe is inserted.



  FETCHARGS     : Arguments. Each probe can have up to 128 args.

   %REG         : Fetch register REG

kernel/trace/trace_uprobe.c

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Original line number Diff line number Diff line
@@ -211,7 +211,7 @@ end: 


/*

 * Argument syntax:

 *  - Add uprobe: p|r[:[GRP/]EVENT] PATH:SYMBOL [FETCHARGS]

 *  - Add uprobe: p|r[:[GRP/]EVENT] PATH:OFFSET [FETCHARGS]

 *

 *  - Remove uprobe: -:[GRP/]EVENT

 */