[PATCH] Documentation/kprobes: Fix typo in Changing Execution Path section

From: Masami Hiramatsu
Date: Fri Jun 22 2018 - 02:05:49 EST


Fix typo and clean it up according to the
comment from Randy.

Signed-off-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Suggested-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
---
Documentation/kprobes.txt | 24 ++++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/Documentation/kprobes.txt b/Documentation/kprobes.txt
index 13d8efd..10f4499 100644
--- a/Documentation/kprobes.txt
+++ b/Documentation/kprobes.txt
@@ -83,22 +83,22 @@ Execution then continues with the instruction following the probepoint.
Changing Execution Path
-----------------------

-Since the kprobes can probe into a running kernel code, it can change
-the register set, including instruction pointer. This operation
-requires maximum attention, such as keeping the stack frame, recovering
-execution path etc. Since it is operated on running kernel and need deep
-knowladge of the archtecture and concurrent computing, you can easily
-shot your foot.
+Since kprobes can probe into a running kernel code, it can change the
+register set, including instruction pointer. This operation requires
+maximum care, such as keeping the stack frame, recovering the execution
+path etc. Since it operates on a running kernel and needs deep knowledge
+of computer architecture and concurrent computing, you can easily shoot
+your foot.

If you change the instruction pointer (and set up other related
-registers) in pre_handler, you must return !0 so that the kprobes
-stops single stepping and just returns to given address.
+registers) in pre_handler, you must return !0 so that kprobes stops
+single stepping and just returns to the given address.
This also means post_handler should not be called anymore.

-Note that this operation may be harder on some architectures which
-use TOC (Table of Contents) for function call, since you have to
-setup new TOC for your function in your module, and recover old
-one after back from it.
+Note that this operation may be harder on some architectures which use
+TOC (Table of Contents) for function call, since you have to setup a new
+TOC for your function in your module, and recover the old one after
+returning from it.

Return Probes
-------------
--
2.7.4