From: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Date: Fri, 28 Apr 2006 12:08:42 +0000 (+0530)
Subject: [PATCH] powerpc/kprobes: fix singlestep out-of-line
X-Git-Tag: v2.6.17-rc4~41^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0ccde0a290b44b8296b82a7683b4c299eb51ba6b;p=pandora-kernel.git

[PATCH] powerpc/kprobes: fix singlestep out-of-line

We currently single-step inline if the instruction on which a kprobe is
inserted is a trap variant.

- variants (such as tdnei, used by BUG()) typically evaluate a condition
  and cause a trap only if the condition is satisfied.
- kprobes uses the unconditional "trap" (0x7fe00008) and single-stepping
  again on this instruction, resulting in another trap without
  evaluating the condition is obviously incorrect.

Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---

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