linux-kernel - [tip:perf/core] perf unwind: Fix wrongly used regs for aarch64 unwind

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Date:	Sun, 26 Jun 2016 03:57:03 -0700
From:	tip-bot for He Kuang <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	jpoimboe@...hat.com, eranian@...gle.com,
	linux-kernel@...r.kernel.org, alexander.shishkin@...ux.intel.com,
	dsahern@...il.com, mingo@...nel.org, wangnan0@...wei.com,
	jolsa@...nel.org, acme@...hat.com, peterz@...radead.org,
	mhiramat@...nel.org, sukadev@...ux.vnet.ibm.com,
	namhyung@...nel.org, ak@...ux.intel.com, tglx@...utronix.de,
	hekuang@...wei.com, adrian.hunter@...el.com, hpa@...or.com,
	kan.liang@...el.com, tumanova@...ux.vnet.ibm.com,
	penberg@...nel.org
Subject: [tip:perf/core] perf unwind: Fix wrongly used regs for aarch64
 unwind

Commit-ID:  3bd03c9583bfb22cb82eeb09d8445bb79d27ae78
Gitweb:     http://git.kernel.org/tip/3bd03c9583bfb22cb82eeb09d8445bb79d27ae78
Author:     He Kuang <hekuang@...wei.com>
AuthorDate: Wed, 22 Jun 2016 06:57:04 +0000
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 23 Jun 2016 10:30:31 -0300

perf unwind: Fix wrongly used regs for aarch64 unwind

By default, "unwind-libunwind-local.c" gets SP/IP register number
according to the host platform, for remote unwind, we should use
register number for target platform. Fix this by define
LIBUNWIND_ARCH_REG_SP/IP in the wrapper file of aarch64 platform.

Signed-off-by: He Kuang <hekuang@...wei.com>
Acked-by: Jiri Olsa <jolsa@...nel.org>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Ekaterina Tumanova <tumanova@...ux.vnet.ibm.com>
Cc: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Kan Liang <kan.liang@...el.com>
Cc: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Pekka Enberg <penberg@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Cc: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Cc: Wang Nan <wangnan0@...wei.com>
Link: http://lkml.kernel.org/r/1466578626-92406-4-git-send-email-hekuang@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/libunwind/arm64.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/perf/util/libunwind/arm64.c b/tools/perf/util/libunwind/arm64.c
index 4fb5395..6559bc5 100644
--- a/tools/perf/util/libunwind/arm64.c
+++ b/tools/perf/util/libunwind/arm64.c
@@ -13,7 +13,12 @@
 
 #define REMOTE_UNWIND_LIBUNWIND
 
+/* Define arch specific functions & regs for libunwind, should be
+ * defined before including "unwind.h"
+ */
 #define LIBUNWIND__ARCH_REG_ID(regnum) libunwind__arm64_reg_id(regnum)
+#define LIBUNWIND__ARCH_REG_IP PERF_REG_ARM64_PC
+#define LIBUNWIND__ARCH_REG_SP PERF_REG_ARM64_SP
 
 #include "unwind.h"
 #include "debug.h"