From mboxrd@z Thu Jan 1 00:00:00 1970 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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 21F48CD128A for ; Wed, 3 Apr 2024 13:29:00 +0000 (UTC) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20230601 header.b=exSjyAOh; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4V8lvZ5g03z3vtT for ; Thu, 4 Apr 2024 00:28:58 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20230601 header.b=exSjyAOh; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gmail.com (client-ip=2607:f8b0:4864:20::42d; helo=mail-pf1-x42d.google.com; envelope-from=groeck7@gmail.com; receiver=lists.ozlabs.org) Received: from mail-pf1-x42d.google.com (mail-pf1-x42d.google.com [IPv6:2607:f8b0:4864:20::42d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4V8ljK2P4Dz3w2x for ; Thu, 4 Apr 2024 00:20:05 +1100 (AEDT) Received: by mail-pf1-x42d.google.com with SMTP id d2e1a72fcca58-6eae2b57ff2so5151911b3a.2 for ; Wed, 03 Apr 2024 06:20:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712150403; x=1712755203; darn=lists.ozlabs.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=acDD7oYfD3QQ420QQJRR06Qs6MsGb4dTYH+kiSwK7vU=; b=exSjyAOhPQlXntjBlcZtc+a2mrkPBKsGRpclOHvPC8IGHN5ZJdwJAeVPNON0teqdPP eQTDXnLo+SmkX5xkR9mUDSN48euUdPq8h5kIrFiJ+P4YE3ITXFoA33ZfLJithhdRSRGo uGePKBqA7pGbXIcnC3DFovts4SYKp56H1dB39QmLP1y+L2vJvwovvag8SFSTFyAMgAev l1rlQ0qZxebN2nRqGv2Hib83jDIO/PAggui8zuYroRUQp7qe4QxMltpyY2yoEvCK362e TNZaQq8ZauJ2AaEIsJcZD3vj8yJQm1CKXzeLGWAZZEFcOGYoSNd5ly1CETGrMd2sboDs FRAg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712150403; x=1712755203; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=acDD7oYfD3QQ420QQJRR06Qs6MsGb4dTYH+kiSwK7vU=; b=JcyjZdUhzaN/Y3rre2pu8wdqWTbb5J1pGUcnrgC5iLmYgtu+LH+yjzyLrdHJ68ikTh naR8EoXyCpY2hOYRxfJjcj3tWVa/Ux3P3CvxDcmeI7+bJloayk3VJaRZzxFqkY1ZUh+O SqlmrJtTJaNgrhkLJpSSXbi88KsyJcNcAz3M1e1jlFmuOcF/XrNm41SYzLq8c4EKNJrF C9vcA3qca+3BS6lGeH9wiUopM3+oN007bDHf2pBWSCgCz4F0kbzRla9inn1UZ1j9BAGU 4c8CCY/v3nHpamDeqz1Q15JK5PtDyeD/fTdRqO6+PriSzJyW5iLazwtXwBx8g0A4C+W9 If0w== X-Forwarded-Encrypted: i=1; AJvYcCUM4JagjjGCiEFkVZVCQI/Au8r49fwfgumnBYbl1IIp/faqPIOTlQVdlAs4sysrPYewAg3pqRLwjgtiPz2XQSypm83MuLcksebpaNSxHw== X-Gm-Message-State: AOJu0Yx/Ikh0SID/wrVa0fpDPZFNvlLqQboKQTpZUaih/82a2kmch5ja vhItx7vXEhZT4p0x148v+AdqcKhufhnTF7trgvgrupZdYeQNjDO8 X-Google-Smtp-Source: AGHT+IH8rm/3VYkllAG+Ph/J3KijfrTneW29i0jWUjHAEJZozpI7yZ7ux/mQaa8T08FdPB1wOfWR4w== X-Received: by 2002:a05:6a00:21cf:b0:6ea:c9c3:94a5 with SMTP id t15-20020a056a0021cf00b006eac9c394a5mr19496685pfj.0.1712150402646; Wed, 03 Apr 2024 06:20:02 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id u32-20020a634720000000b005e838955bc4sm11440044pga.58.2024.04.03.06.20.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 06:20:02 -0700 (PDT) From: Guenter Roeck To: linux-kselftest@vger.kernel.org Subject: [PATCH v3 12/15] sh: Add support for suppressing warning backtraces Date: Wed, 3 Apr 2024 06:19:33 -0700 Message-Id: <20240403131936.787234-13-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240403131936.787234-1-linux@roeck-us.net> References: <20240403131936.787234-1-linux@roeck-us.net> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: x86@kernel.org, loongarch@lists.linux.dev, linux-doc@vger.kernel.org, dri-devel@lists.freedesktop.org, Brendan Higgins , Rich Felker , linux-riscv@lists.infradead.org, David Airlie , Arthur Grillo , =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= , linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, Daniel Diaz , Yoshinori Sato , linux-sh@vger.kernel.org, Naresh Kamboju , =?UTF-8?q?Ma=C3=ADra=20Canal?= , Dan Carpenter , Linux Kernel Functional Testing , Guenter Roeck , Kees Cook , Arnd Bergmann , Maarten Lankhorst , Maxime Ripard , David Gow , John Paul Adrian Glaubitz , Daniel Vetter , linux-arm-kernel@lists.infradead.org, kunit-dev@googlegroups.com, linux-parisc@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Zimmermann , Andrew Morton , linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Add name of functions triggering warning backtraces to the __bug_table object section to enable support for suppressing WARNING backtraces. To limit image size impact, the pointer to the function name is only added to the __bug_table section if both CONFIG_KUNIT_SUPPRESS_BACKTRACE and CONFIG_DEBUG_BUGVERBOSE are enabled. Otherwise, the __func__ assembly parameter is replaced with a (dummy) NULL parameter to avoid an image size increase due to unused __func__ entries (this is necessary because __func__ is not a define but a virtual variable). Tested-by: Linux Kernel Functional Testing Acked-by: Dan Carpenter Cc: Yoshinori Sato Cc: Rich Felker Cc: John Paul Adrian Glaubitz Signed-off-by: Guenter Roeck --- v2: - Rebased to v6.9-rc1 - Added Tested-by:, Acked-by:, and Reviewed-by: tags - Introduced KUNIT_SUPPRESS_BACKTRACE configuration option v3: - Rebased to v6.9-rc2 arch/sh/include/asm/bug.h | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-) diff --git a/arch/sh/include/asm/bug.h b/arch/sh/include/asm/bug.h index 05a485c4fabc..470ce6567d20 100644 --- a/arch/sh/include/asm/bug.h +++ b/arch/sh/include/asm/bug.h @@ -24,21 +24,36 @@ * The offending file and line are encoded in the __bug_table section. */ #ifdef CONFIG_DEBUG_BUGVERBOSE + +#ifdef CONFIG_KUNIT_SUPPRESS_BACKTRACE +# define HAVE_BUG_FUNCTION +# define __BUG_FUNC_PTR "\t.long %O2\n" +#else +# define __BUG_FUNC_PTR +#endif /* CONFIG_KUNIT_SUPPRESS_BACKTRACE */ + #define _EMIT_BUG_ENTRY \ "\t.pushsection __bug_table,\"aw\"\n" \ "2:\t.long 1b, %O1\n" \ - "\t.short %O2, %O3\n" \ - "\t.org 2b+%O4\n" \ + __BUG_FUNC_PTR \ + "\t.short %O3, %O4\n" \ + "\t.org 2b+%O5\n" \ "\t.popsection\n" #else #define _EMIT_BUG_ENTRY \ "\t.pushsection __bug_table,\"aw\"\n" \ "2:\t.long 1b\n" \ - "\t.short %O3\n" \ - "\t.org 2b+%O4\n" \ + "\t.short %O4\n" \ + "\t.org 2b+%O5\n" \ "\t.popsection\n" #endif +#ifdef HAVE_BUG_FUNCTION +# define __BUG_FUNC __func__ +#else +# define __BUG_FUNC NULL +#endif + #define BUG() \ do { \ __asm__ __volatile__ ( \ @@ -47,6 +62,7 @@ do { \ : \ : "n" (TRAPA_BUG_OPCODE), \ "i" (__FILE__), \ + "i" (__BUG_FUNC), \ "i" (__LINE__), "i" (0), \ "i" (sizeof(struct bug_entry))); \ unreachable(); \ @@ -60,6 +76,7 @@ do { \ : \ : "n" (TRAPA_BUG_OPCODE), \ "i" (__FILE__), \ + "i" (__BUG_FUNC), \ "i" (__LINE__), \ "i" (BUGFLAG_WARNING|(flags)), \ "i" (sizeof(struct bug_entry))); \ @@ -85,6 +102,7 @@ do { \ : \ : "n" (TRAPA_BUG_OPCODE), \ "i" (__FILE__), \ + "i" (__BUG_FUNC), \ "i" (__LINE__), \ "i" (BUGFLAG_UNWINDER), \ "i" (sizeof(struct bug_entry))); \ -- 2.39.2