linux-kernel - [PATCH 1/2] perf/probe: verify instruction/offset in perf before adding a uprobe

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Date:	Thu, 12 Apr 2012 14:59:04 +0530
From:	Prashanth Nageshappa <prashanth@...ux.vnet.ibm.com>
To:	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Jim Keniston <jkenisto@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux-mm <linux-mm@...ck.org>, Oleg Nesterov <oleg@...hat.com>,
	Andi Kleen <andi@...stfloor.org>,
	Christoph Hellwig <hch@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Anton Arapov <anton@...hat.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Subject: [PATCH 1/2] perf/probe: verify instruction/offset in perf before
 adding a uprobe

To verify instruction/offset in perf, before adding a uprobe we
need to use arc/x86/lib/insn.c from perf code. Since perf Makefile
enables -Wswitch-default flag it causes build warnings/failures. This
patch is to address the build warnings in insn.c.


Signed-off-by: Prashanth Nageshappa <prashanth@...ux.vnet.ibm.com>
---

 arch/x86/lib/insn.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/arch/x86/lib/insn.c b/arch/x86/lib/insn.c
index 25feb1a..b9e42f1 100644
--- a/arch/x86/lib/insn.c
+++ b/arch/x86/lib/insn.c
@@ -397,6 +397,8 @@ static void __get_moffset(struct insn *insn)
 		insn->moffset2.value = get_next(int, insn);
 		insn->moffset2.nbytes = 4;
 		break;
+	default:
+		break;
 	}
 	insn->moffset1.got = insn->moffset2.got = 1;

@@ -417,6 +419,8 @@ static void __get_immv32(struct insn *insn)
 		insn->immediate.value = get_next(int, insn);
 		insn->immediate.nbytes = 4;
 		break;
+	default:
+		break;
 	}

 err_out:
@@ -441,6 +445,8 @@ static void __get_immv(struct insn *insn)
 		insn->immediate2.value = get_next(int, insn);
 		insn->immediate2.nbytes = 4;
 		break;
+	default:
+		break;
 	}
 	insn->immediate1.got = insn->immediate2.got = 1;

@@ -463,6 +469,8 @@ static void __get_immptr(struct insn *insn)
 	case 8:
 		/* ptr16:64 is not exist (no segment) */
 		return;
+	default:
+		break;
 	}
 	insn->immediate2.value = get_next(unsigned short, insn);
 	insn->immediate2.nbytes = 2;

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