From nobody Tue Jun 30 00:47:38 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DD7F5C433F5 for ; Fri, 28 Jan 2022 10:58:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347949AbiA1K57 (ORCPT ); Fri, 28 Jan 2022 05:57:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49540 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242852AbiA1K56 (ORCPT ); Fri, 28 Jan 2022 05:57:58 -0500 Received: from mail-qk1-x732.google.com (mail-qk1-x732.google.com [IPv6:2607:f8b0:4864:20::732]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E26B4C061714 for ; Fri, 28 Jan 2022 02:57:57 -0800 (PST) Received: by mail-qk1-x732.google.com with SMTP id o25so5169420qkj.7 for ; Fri, 28 Jan 2022 02:57:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=/+SeEyjxwFir/H5f1F7mn87tKlWsYSPhRkGZK9gJ8WQ=; b=idITS+qsEgTSqNSARyHb+MK0YAl2Lqm/wpb3MvDnXngVHUq1mz+rnZ7QdNtndfwy/4 uNyfrv58+iBhnw6pxZPKkFayx4X6V8R1jT8XdorGiKT1UH9Pove0mzucSr6xprNbgHU9 6Nk01dHZv4vyA1HMxj+iqrJxlNtvthBQ5kOfiswGZaZWvu8hymtRi7HBsvbGS9/0yjKT YrPHHIT4By0Npi7M/d4LX7s9Kfk72OV6yfzY7alNXjR3UIjigIBMiCovwY500/flfX3c +Ei8dBGIBRda++OvbQsfCrpbi9LgGLFxDgfXAPrGa2RECeIZtIWqx5Uc7RX4xAnJyzK1 XcWQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=/+SeEyjxwFir/H5f1F7mn87tKlWsYSPhRkGZK9gJ8WQ=; b=dnr3qMQIPrGvNcFwBCpl27SdX0K4/uvfNAiQn0ithDM76LfvvdKAEGITCNRHdJeP+g pkQvrjlPRPm7xsmVDDIqFfY+A9uhQ4hOlZAz30Lv7tQGKb8hkxw/Ft4HKo/37ojAiJBv Eh61Ta0WWrwkOhzxLuzyYNrIQ/HCW14uMWswdhoCcqQVuhi2XtgHtbgqFeLOwoyf5L5L r/ILVT6NyIAuDTRRy6V1McdIIOXas9MbZlNncXnNgXVsk3j8CsB/JDgJCDBqF8zRA9ok ObAbE2o5+VVz7tWkZ1bRWzilJz4eXUxLaUczqTsP/n9TcntqFdavMem+MU7HMFSQNA/5 Mvag== X-Gm-Message-State: AOAM530q//+W7ngLjSMSEu8xgodnKkGi5m2cJ8FFzYAaEU69VkGEJ+wi rwah1xX0327GSgB8zXF+TUU= X-Google-Smtp-Source: ABdhPJwAlxxr8DwO9VIhBMkCY9tCwgduZKFXPTJfv+jBpE31Di+Bi3EWZhZvy5bwYqTYzZQsDN44Dw== X-Received: by 2002:a05:620a:1132:: with SMTP id p18mr5276652qkk.543.1643367477079; Fri, 28 Jan 2022 02:57:57 -0800 (PST) Received: from WRT-WX9.. ([207.246.89.135]) by smtp.gmail.com with ESMTPSA id t11sm2932998qkm.77.2022.01.28.02.57.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Jan 2022 02:57:56 -0800 (PST) From: Changbin Du To: Nathan Chancellor , Masahiro Yamada , Nick Desaulniers Cc: linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-riscv@lists.infradead.org, Changbin Du Subject: [PATCH] kallsyms: ignore local block labels generated by compiler Date: Fri, 28 Jan 2022 18:57:46 +0800 Message-Id: <20220128105746.2459-1-changbin.du@gmail.com> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The llvm compiler can generate lots of local block labels and they might overlap with C defined symbols. So let's ignore such local labels. Before this change, dumpstack shows a local symbol for epc: [ 0.040341][ T0] Hardware name: riscv-virtio,qemu (DT) [ 0.040376][ T0] epc : .LBB6_14+0x22/0x6a [ 0.040452][ T0] ra : restore_all+0x12/0x6e After this change, the C defined symbol is shown which is expected: [ 0.035795][ T0] Hardware name: riscv-virtio,qemu (DT) [ 0.036332][ T0] epc : trace_hardirqs_on+0x54/0x13c [ 0.036567][ T0] ra : restore_all+0x12/0x6e Signed-off-by: Changbin Du --- scripts/kallsyms.c | 1 + 1 file changed, 1 insertion(+) diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c index 54ad86d13784..5f4be9d72a32 100644 --- a/scripts/kallsyms.c +++ b/scripts/kallsyms.c @@ -108,6 +108,7 @@ static bool is_ignored_symbol(const char *name, char ty= pe) /* Symbol names that begin with the following are ignored.*/ static const char * const ignored_prefixes[] =3D { "$", /* local symbols for ARM, MIPS, etc. */ + ".LBB", /* local block labels generated by compiler */ ".LASANPC", /* s390 kasan local symbols */ "__crc_", /* modversions */ "__efistub_", /* arm64 EFI stub namespace */ --=20 2.32.0