From: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Date: Wed, 5 Sep 2012 14:31:12 +0000 (+0900)
Subject: kprobes/x86: Fix kprobes to collectly handle IP on ftrace
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~97^2~8^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4b036d54bf849a75d0103b33d92a53f89ecb9315;p=pandora-kernel.git

kprobes/x86: Fix kprobes to collectly handle IP on ftrace

Current kprobe_ftrace_handler expects regs->ip == ip, but it is
incorrect (originally on x86-64). Actually, ftrace handler sets
regs->ip = ip + MCOUNT_INSN_SIZE.
kprobe_ftrace_handler must take care for that.

Link: http://lkml.kernel.org/r/20120905143112.10329.72069.stgit@localhost.localdomain

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---

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