linux-kernel - [PATCH 0/3] perf tools: Add libdw DWARF post unwind support for ARM64

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Date:	Tue,  6 May 2014 17:55:30 +0200
From:	Jean Pihet <jean.pihet@...aro.org>
To:	Jiri Olsa <jolsa@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	will.deacon@....com
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linaro-kernel@...ts.linaro.org" <linaro-kernel@...ts.linaro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Jean Pihet <jean.pihet@...aro.org>
Subject: [PATCH 0/3] perf tools: Add libdw DWARF post unwind support for ARM64

Adding libdw DWARF post unwind support, which is part
of elfutils-devel/libdw-dev package from version 0.158.

Also includes the test suite for dwarf unwinding, by adding the
arch specific test code and the perf_regs_load function.

This series depends on the following kernel patches series:
- AARCH64 unwinding support [1]. Already mainlined.
- ARM libdw integration [2],
and on the changes from the branch for:
- libdw AARCH64 unwinding support [3].

[1] http://www.spinics.net/lists/arm-kernel/msg304483.html
[2] https://lkml.org/lkml/2014/5/6/366
[3] https://git.fedorahosted.org/cgit/elfutils.git/log/?h=mjw/aarch64-unwind

ToDo: investigate the libdw unwinding problem with compat binaries (i.e.
ARMv7 binaries running on ARMv8). Since this functionality works ok with
libunwind, the problem should be in libdw compat support [3].


Jean Pihet (3):
  perf tests: Introduce perf_regs_load function on ARM64
  perf tests: Add dwarf unwind test on ARM64
  perf tools: Add libdw DWARF post unwind support for ARM64

 tools/perf/Makefile.perf                   |  2 +-
 tools/perf/arch/arm64/Makefile             |  7 ++++
 tools/perf/arch/arm64/include/perf_regs.h  |  5 +++
 tools/perf/arch/arm64/tests/dwarf-unwind.c | 59 ++++++++++++++++++++++++++++++
 tools/perf/arch/arm64/tests/regs_load.S    | 39 ++++++++++++++++++++
 tools/perf/arch/arm64/util/unwind-libdw.c  | 53 +++++++++++++++++++++++++++
 tools/perf/tests/builtin-test.c            |  3 +-
 tools/perf/tests/tests.h                   |  3 +-
 8 files changed, 168 insertions(+), 3 deletions(-)
 create mode 100644 tools/perf/arch/arm64/tests/dwarf-unwind.c
 create mode 100644 tools/perf/arch/arm64/tests/regs_load.S
 create mode 100644 tools/perf/arch/arm64/util/unwind-libdw.c

---
Rebased on the latest jolsa/perf/core

-- 
1.7.11.7

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