From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751716AbdBJHpU (ORCPT ); Fri, 10 Feb 2017 02:45:20 -0500 Received: from terminus.zytor.com ([65.50.211.136]:50730 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751066AbdBJHpR (ORCPT ); Fri, 10 Feb 2017 02:45:17 -0500 Date: Thu, 9 Feb 2017 23:40:17 -0800 From: tip-bot for He Kuang Message-ID: Cc: hekuang@huawei.com, linux-kernel@vger.kernel.org, acme@redhat.com, hpa@zytor.com, peterz@infradead.org, tglx@linutronix.de, mhiramat@kernel.org, wangnan0@huawei.com, will.deacon@arm.com, bintian.wang@huawei.com, alexander.shishkin@linux.intel.com, jolsa@redhat.com, mingo@kernel.org Reply-To: alexander.shishkin@linux.intel.com, mingo@kernel.org, jolsa@redhat.com, will.deacon@arm.com, bintian.wang@huawei.com, wangnan0@huawei.com, tglx@linutronix.de, mhiramat@kernel.org, hpa@zytor.com, peterz@infradead.org, linux-kernel@vger.kernel.org, acme@redhat.com, hekuang@huawei.com In-Reply-To: <20170207073412.26983-1-hekuang@huawei.com> References: <20170207073412.26983-1-hekuang@huawei.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] perf tools arm64: Add support for generating bpf prologue Git-Commit-ID: 3bb53c9f124bd9297f18d58a395cff59dfaf8541 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 3bb53c9f124bd9297f18d58a395cff59dfaf8541 Gitweb: http://git.kernel.org/tip/3bb53c9f124bd9297f18d58a395cff59dfaf8541 Author: He Kuang AuthorDate: Tue, 7 Feb 2017 07:34:11 +0000 Committer: Arnaldo Carvalho de Melo CommitDate: Wed, 8 Feb 2017 08:55:01 -0300 perf tools arm64: Add support for generating bpf prologue Since HAVE_KPROBES can be enabled in arm64, this patch introduces regs_query_register_offset() to convert register name to offset for arm64, so the BPF prologue feature is ready to use. Signed-off-by: He Kuang Reviewed-by: Will Deacon Acked-by: Masami Hiramatsu Cc: Alexander Shishkin Cc: Bintian Wang Cc: Jiri Olsa Cc: Peter Zijlstra Cc: Wang Nan Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/20170207073412.26983-1-hekuang@huawei.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/arch/arm64/Makefile | 1 + tools/perf/arch/arm64/util/dwarf-regs.c | 15 ++++++++++++++- 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/tools/perf/arch/arm64/Makefile b/tools/perf/arch/arm64/Makefile index 18b1351..eebe1ec 100644 --- a/tools/perf/arch/arm64/Makefile +++ b/tools/perf/arch/arm64/Makefile @@ -2,3 +2,4 @@ ifndef NO_DWARF PERF_HAVE_DWARF_REGS := 1 endif PERF_HAVE_JITDUMP := 1 +PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET := 1 diff --git a/tools/perf/arch/arm64/util/dwarf-regs.c b/tools/perf/arch/arm64/util/dwarf-regs.c index d49efeb..068b618 100644 --- a/tools/perf/arch/arm64/util/dwarf-regs.c +++ b/tools/perf/arch/arm64/util/dwarf-regs.c @@ -10,17 +10,20 @@ #include #include +#include /* for struct user_pt_regs */ +#include "util.h" struct pt_regs_dwarfnum { const char *name; unsigned int dwarfnum; }; -#define STR(s) #s #define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num} #define GPR_DWARFNUM_NAME(num) \ {.name = STR(%x##num), .dwarfnum = num} #define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0} +#define DWARFNUM2OFFSET(index) \ + (index * sizeof((struct user_pt_regs *)0)->regs[0]) /* * Reference: @@ -78,3 +81,13 @@ const char *get_arch_regstr(unsigned int n) return roff->name; return NULL; } + +int regs_query_register_offset(const char *name) +{ + const struct pt_regs_dwarfnum *roff; + + for (roff = regdwarfnum_table; roff->name != NULL; roff++) + if (!strcmp(roff->name, name)) + return DWARFNUM2OFFSET(roff->dwarfnum); + return -EINVAL; +}