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[209.132.180.67]) by mx.google.com with ESMTP id nw6si10190300obb.65.2015.09.15.08.29.28; Tue, 15 Sep 2015 08:29:30 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753610AbbIOP3C (ORCPT + 29 others); Tue, 15 Sep 2015 11:29:02 -0400 Received: from casper.infradead.org ([85.118.1.10]:45312 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753378AbbIOP27 (ORCPT ); Tue, 15 Sep 2015 11:28:59 -0400 Received: from 191-247-227-57.3g.claro.net.br ([191.247.227.57] helo=zoo.infradead.org) by casper.infradead.org with esmtpsa (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZbsA7-0006qq-LS; Tue, 15 Sep 2015 15:28:52 +0000 Received: by zoo.infradead.org (Postfix, from userid 1000) id 54A4A2201BC; Tue, 15 Sep 2015 12:28:41 -0300 (BRT) From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Wang Nan , Alexei Starovoitov , Brendan Gregg , Daniel Borkmann , David Ahern , Jiri Olsa , Kaixu Xia , Namhyung Kim , Paul Mackerras , Peter Zijlstra , Zefan Li , pi3orama@163.com, He Kuang , Arnaldo Carvalho de Melo Subject: [PATCH 7/8] perf tools: regs_query_register_offset() infrastructure Date: Tue, 15 Sep 2015 12:28:36 -0300 Message-Id: <1442330917-21464-8-git-send-email-acme@kernel.org> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1442330917-21464-1-git-send-email-acme@kernel.org> References: <1442330917-21464-1-git-send-email-acme@kernel.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html 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: acme@kernel.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.215.42 as permitted sender) smtp.mailfrom=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: , From: Wang Nan regs_query_register_offset() is a helper function which converts register name like "%rax" to offset of a register in 'struct pt_regs', which is required by BPF prologue generator. PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET indicates an architecture supports converting name of a register to its offset in 'struct pt_regs'. HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET is introduced as the corresponding CFLAGS of PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET. Signed-off-by: Wang Nan Acked-by: Masami Hiramatsu Cc: Alexei Starovoitov Cc: Brendan Gregg Cc: Daniel Borkmann Cc: David Ahern Cc: Jiri Olsa Cc: Kaixu Xia Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1441523623-152703-19-git-send-email-wangnan0@huawei.com Signed-off-by: He Kuang [ Extracted from eBPF patches ] Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/config/Makefile | 4 ++++ tools/perf/util/include/dwarf-regs.h | 8 ++++++++ 2 files changed, 12 insertions(+) diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile index 827557fc7511..0435ac41cea9 100644 --- a/tools/perf/config/Makefile +++ b/tools/perf/config/Makefile @@ -109,6 +109,10 @@ endif # include ARCH specific config -include $(src-perf)/arch/$(ARCH)/Makefile +ifdef PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET + CFLAGS += -DHAVE_ARCH_REGS_QUERY_REGISTER_OFFSET +endif + include $(src-perf)/config/utilities.mak ifeq ($(call get-executable,$(FLEX)),) diff --git a/tools/perf/util/include/dwarf-regs.h b/tools/perf/util/include/dwarf-regs.h index 8f149655f497..07c644ed64c4 100644 --- a/tools/perf/util/include/dwarf-regs.h +++ b/tools/perf/util/include/dwarf-regs.h @@ -5,4 +5,12 @@ const char *get_arch_regstr(unsigned int n); #endif +#ifdef HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET +/* + * Arch should support fetching the offset of a register in pt_regs + * by its name. See kernel's regs_query_register_offset in + * arch/xxx/kernel/ptrace.c. + */ +int regs_query_register_offset(const char *name); +#endif #endif