From nobody Sun Feb 8 12:52:03 2026 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.14]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 91BB02940F; Wed, 9 Apr 2025 02:23:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.14 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744165426; cv=none; b=CXTDcpijfwWhgfmN0g0avPm0fGWC8yms8xD2/xN0c9K86mrFlA/Q4VZpgbyW5s/dMxqMqUTjsaeR9Ae6w1o26D8DFkpwqgCyXbfnTs5p6bEbGqkoLlVUHibEfv2qcjvaXJ0DMPcGu5gj76tHsJWOD95Oxa0XBXSeLpw7mmvHNgM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744165426; c=relaxed/simple; bh=MFPau5lifW8jMHZfdSw/2NIo4U/nm4MojtGTr6OejvA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=IE67xO1vS0ttFzC9Cm6kNytfEJyddYrk/YLFfoHNc196DRGrHGZGyzkVW9DUoEdj6AC0RcwAWE9QbOcZ1xSoUi1qxmMGH34WEi/JmQdZ9oWJfr5C3jJvbzc+x4YNJohYzah2AVhItTBKf4fJZ4FITXbKP1wUzfso9LjPjsXDrqQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=dDO8Siqy; arc=none smtp.client-ip=192.198.163.14 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="dDO8Siqy" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1744165424; x=1775701424; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=MFPau5lifW8jMHZfdSw/2NIo4U/nm4MojtGTr6OejvA=; b=dDO8Siqys7DzuxEvSpe77omIdtD2GWcQzhjauHflJcrfMachxAGCH4mc 1PzeTVD45B+yrBP/ZY+Z4ObtOrOTEXHQS5E7nurP+1zRCQtPhWxbkdbrn vc8tGh3qFIjDrfMUmPaNPRKGqxjYidYUtTHThjSD0oMrL/Mk3yWPZJa8l +ZrYyO4YfqipK4XQQjetvorQOC6SVdEn9nfV9fVoIx+8Cqq0iTwIUqLya OoqgYf9TIm8m30ULMAtthM5SArjCYV+oIRXPRYOiBQDKwjEdGs8/8YXot Ph4gA9jjFAR9IgxMW1GaNH2MZ83U9PBSihUoU4ZRZIXSUSq1/dogWElk0 A==; X-CSE-ConnectionGUID: ohBDsV96RoK/XZCdlNcHBA== X-CSE-MsgGUID: dCEoFr3rQv2P1V6GgWaWoA== X-IronPort-AV: E=McAfee;i="6700,10204,11397"; a="45784192" X-IronPort-AV: E=Sophos;i="6.15,199,1739865600"; d="scan'208";a="45784192" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by fmvoesa108.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Apr 2025 19:23:43 -0700 X-CSE-ConnectionGUID: Ppnwobg6RqKNtrFV7mD+Qw== X-CSE-MsgGUID: Stmnr3IERtGTLHBlnrrVNg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,199,1739865600"; d="scan'208";a="165675265" Received: from haibo-optiplex-7090.sh.intel.com ([10.239.153.94]) by orviesa001.jf.intel.com with ESMTP; 08 Apr 2025 19:23:39 -0700 From: Haibo Xu To: Cc: xiaobo55x@gmail.com, Haibo Xu , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , "Liang, Kan" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Stephen Brennan , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Subject: [PATCH] perf symbols: Ignore mapping symbols on riscv Date: Wed, 9 Apr 2025 10:51:56 +0800 Message-ID: <20250409025202.201046-1-haibo1.xu@intel.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" RISCV ELF use mapping symbols with special names $x, $d to identify regions of RISCV code or code with different ISAs[1]. These symbols don't identify functions, so will confuse the perf output. The patch filters out these symbols at load time, similar to "4886f2ca perf symbols: Ignore mapping symbols on aarch64". [1] https://github.com/riscv-non-isa/riscv-elf-psabi-doc/blob/ master/riscv-elf.adoc#mapping-symbol Signed-off-by: Haibo Xu Acked-by: Namhyung Kim --- tools/perf/util/symbol-elf.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c index fbf6d0f73af9..55b1409b0593 100644 --- a/tools/perf/util/symbol-elf.c +++ b/tools/perf/util/symbol-elf.c @@ -1733,6 +1733,12 @@ dso__load_sym_internal(struct dso *dso, struct map *= map, struct symsrc *syms_ss, continue; } =20 + /* Reject RISCV ELF "mapping symbols" */ + if (ehdr.e_machine =3D=3D EM_RISCV) { + if (elf_name[0] =3D=3D '$' && strchr("dx", elf_name[1])) + continue; + } + if (runtime_ss->opdsec && sym.st_shndx =3D=3D runtime_ss->opdidx) { u32 offset =3D sym.st_value - syms_ss->opdshdr.sh_addr; u64 *opd =3D opddata->d_buf + offset; --=20 2.43.0