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[81.240.219.193]) by mx.google.com with ESMTPSA id s46sm39364798ees.3.2014.05.06.08.26.40 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Tue, 06 May 2014 08:26:41 -0700 (PDT) From: Jean Pihet To: Jiri Olsa , Arnaldo Carvalho de Melo , will.deacon@arm.com Cc: "linux-kernel@vger.kernel.org" , "linaro-kernel@lists.linaro.org" , "linux-arm-kernel@lists.infradead.org" , Jean Pihet , Corey Ashford , Frederic Weisbecker , Ingo Molnar , Namhyung Kim , Paul Mackerras , Peter Zijlstra , David Ahern Subject: [PATCH 3/3] perf tools: Add libdw DWARF post unwind support for ARM Date: Tue, 6 May 2014 17:26:19 +0200 Message-Id: <1399389979-11279-4-git-send-email-jean.pihet@linaro.org> X-Mailer: git-send-email 1.7.11.7 In-Reply-To: <1399389979-11279-1-git-send-email-jean.pihet@linaro.org> References: <1399389979-11279-1-git-send-email-jean.pihet@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: list List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: jean.pihet@linaro.org X-Original-Authentication-Results: mx.google.com; spf=neutral (google.com: patch+caf_=patchwork-forward=linaro.org@linaro.org does not designate permitted sender hosts) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , Adding libdw DWARF post unwind support, which is part of elfutils-devel/libdw-dev package from version 0.158. The new code is contained in unwin-libdw.c object, and implements unwind__get_entries unwind interface function. Signed-off-by: Jean Pihet Cc: Jiri Olsa Cc: Corey Ashford Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Arnaldo Carvalho de Melo Cc: David Ahern --- tools/perf/arch/arm/Makefile | 5 +++++ tools/perf/arch/arm/util/unwind-libdw.c | 36 +++++++++++++++++++++++++++++++++ 2 files changed, 41 insertions(+) create mode 100644 tools/perf/arch/arm/util/unwind-libdw.c diff --git a/tools/perf/arch/arm/Makefile b/tools/perf/arch/arm/Makefile index 221f21d..09d6215 100644 --- a/tools/perf/arch/arm/Makefile +++ b/tools/perf/arch/arm/Makefile @@ -4,6 +4,11 @@ LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/dwarf-regs.o endif ifndef NO_LIBUNWIND LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/unwind-libunwind.o +endif +ifndef NO_LIBDW_DWARF_UNWIND +LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/unwind-libdw.o +endif +ifndef NO_DWARF_UNWIND LIB_OBJS += $(OUTPUT)arch/$(ARCH)/tests/regs_load.o LIB_OBJS += $(OUTPUT)arch/$(ARCH)/tests/dwarf-unwind.o endif diff --git a/tools/perf/arch/arm/util/unwind-libdw.c b/tools/perf/arch/arm/util/unwind-libdw.c new file mode 100644 index 0000000..b4176c6 --- /dev/null +++ b/tools/perf/arch/arm/util/unwind-libdw.c @@ -0,0 +1,36 @@ +#include +#include "../../util/unwind-libdw.h" +#include "../../util/perf_regs.h" + +bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg) +{ + struct unwind_info *ui = arg; + struct regs_dump *user_regs = &ui->sample->user_regs; + Dwarf_Word dwarf_regs[PERF_REG_ARM_MAX]; + +#define REG(r) ({ \ + Dwarf_Word val = 0; \ + perf_reg_value(&val, user_regs, PERF_REG_ARM_##r); \ + val; \ +}) + + dwarf_regs[0] = REG(R0); + dwarf_regs[1] = REG(R1); + dwarf_regs[2] = REG(R2); + dwarf_regs[3] = REG(R3); + dwarf_regs[4] = REG(R4); + dwarf_regs[5] = REG(R5); + dwarf_regs[6] = REG(R6); + dwarf_regs[7] = REG(R7); + dwarf_regs[8] = REG(R8); + dwarf_regs[9] = REG(R9); + dwarf_regs[10] = REG(R10); + dwarf_regs[11] = REG(FP); + dwarf_regs[12] = REG(IP); + dwarf_regs[13] = REG(SP); + dwarf_regs[14] = REG(LR); + dwarf_regs[15] = REG(PC); + + return dwfl_thread_state_registers(thread, 0, PERF_REG_ARM_MAX, + dwarf_regs); +}