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 7ECD9C54E64 for ; Mon, 25 Mar 2024 18:00:45 +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=WpiirG0v; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4V3LMJ14ySz3wBB for ; Tue, 26 Mar 2024 05:00:44 +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=WpiirG0v; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gmail.com (client-ip=2607:f8b0:4864:20::633; helo=mail-pl1-x633.google.com; envelope-from=groeck7@gmail.com; receiver=lists.ozlabs.org) Received: from mail-pl1-x633.google.com (mail-pl1-x633.google.com [IPv6:2607:f8b0:4864:20::633]) (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 4V3LBf06zsz3vjC for ; Tue, 26 Mar 2024 04:53:13 +1100 (AEDT) Received: by mail-pl1-x633.google.com with SMTP id d9443c01a7336-1dddbeac9f9so29182475ad.3 for ; Mon, 25 Mar 2024 10:53:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1711389191; x=1711993991; 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=dtwUXE+IqNuorT54j0aaEA4aHeW6X4Zjm5IQoCcbGI8=; b=WpiirG0v5uOrSp3QoNezTIglGvvAyj55lDjOI3ytDykX+p2p3UelWTz+idTwGQrka8 OH8VXgdl4Di69KNw7bNQkGKbo4qWKEYob43dRB34TTcvjt0PGWDRYIJ9FMxVPvFeEPCt oca+P8tPHf1PUB4RmyhQ/w6WQ1Tgdrm6gkY3N8l7r8wme7fPsUM8QeGRKMVgY7Hh/9l/ iYp3ZG2iqLdEV3St5KgkVCs1eL7BbQ73tIw16sATRHzDuncQTkGbBnudG5d/nMgpVOqH NtvUBqcOTAs7h/381/nuhJkIqJxZOuHuJaMShV0AGE9ly7wft9xrNS+Cf2IxU4Vi2qhH ofhw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1711389191; x=1711993991; 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=dtwUXE+IqNuorT54j0aaEA4aHeW6X4Zjm5IQoCcbGI8=; b=lMXJsPaj8dInJQPAzhJXvvIbx8jMm0Gaxpk2ew5PuAEpevOiYGsMr0xYAqwR7wrxsr FKkUvodyn9QolxxDJcvzQalZC3mFL9wFIZIas804rAKXaDGE2UL8Czq14+h23/CR2PYm foCEmXJ8hdpBp2gLFwNM7PDqvBUY4BbykFTL9W0NC23YAi7mWQVEeGXOYxWrkFZsRKfF HJR/jlVCQNSdgS+L7o0+4wd1aKX4txO5Txj4oPm66hnp92XYdhD7gXgNbvBT5yp0Dh5S nj68by50KqRmMy/4k2aRepFzvGLITkm8WOA/0ZrrgYldxfd1VTwCGSCI2mTEfCPSaEFu uOZw== X-Forwarded-Encrypted: i=1; AJvYcCVMQcTiGJBlDMBkPFkAdYc4vvD9aVlKPssEQM4AEaplx9dwAe15Xek9aZHWQSpQ+5gWytt3p+MrNpuURP8mGTyx9u/jJianrhVRaDba+w== X-Gm-Message-State: AOJu0Yx4rsJhCiFaePlv2cvXoqMtmMYuaH6ItzZ9DZQ0aHUPRzhyjUMc BiDiJrHwmB0rEv4uP9ZiHfH64orBHsCErn3WMEMF6ZkRwM/zhdP8 X-Google-Smtp-Source: AGHT+IFgb86jAL+eLx1VucoqIZk09YlvJLM+FeVnRGQ5UPNHQryATu5Oxjm2FFfuTD/AWoK6+BajtA== X-Received: by 2002:a17:902:f548:b0:1e0:94a1:95c1 with SMTP id h8-20020a170902f54800b001e094a195c1mr530124plf.29.1711389191372; Mon, 25 Mar 2024 10:53:11 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id l5-20020a170902f68500b001dda64281a9sm4953716plg.85.2024.03.25.10.53.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Mar 2024 10:53:10 -0700 (PDT) From: Guenter Roeck To: linux-kselftest@vger.kernel.org Subject: [PATCH v2 10/14] parisc: Add support for suppressing warning backtraces Date: Mon, 25 Mar 2024 10:52:44 -0700 Message-Id: <20240325175248.1499046-11-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240325175248.1499046-1-linux@roeck-us.net> References: <20240325175248.1499046-1-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: loongarch@lists.linux.dev, linux-doc@vger.kernel.org, dri-devel@lists.freedesktop.org, Brendan Higgins , 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 , 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 , 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, Helge Deller 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). While at it, declare assembler parameters as constants where possible. Refine .blockz instructions to calculate the necessary padding instead of using fixed values. Tested-by: Linux Kernel Functional Testing Acked-by: Dan Carpenter Acked-by: Helge Deller Signed-off-by: Guenter Roeck --- - Rebased to v6.9-rc1 - Added Tested-by:, Acked-by:, and Reviewed-by: tags - Introduced KUNIT_SUPPRESS_BACKTRACE configuration option arch/parisc/include/asm/bug.h | 29 +++++++++++++++++++++-------- 1 file changed, 21 insertions(+), 8 deletions(-) diff --git a/arch/parisc/include/asm/bug.h b/arch/parisc/include/asm/bug.h index 833555f74ffa..b59c3f7380bf 100644 --- a/arch/parisc/include/asm/bug.h +++ b/arch/parisc/include/asm/bug.h @@ -23,8 +23,17 @@ # define __BUG_REL(val) ".word " __stringify(val) #endif - #ifdef CONFIG_DEBUG_BUGVERBOSE + +#ifdef CONFIG_KUNIT_SUPPRESS_BACKTRACE +# define HAVE_BUG_FUNCTION +# define __BUG_FUNC_PTR __BUG_REL(%c1) +# define __BUG_FUNC __func__ +#else +# define __BUG_FUNC_PTR +# define __BUG_FUNC NULL +#endif /* CONFIG_KUNIT_SUPPRESS_BACKTRACE */ + #define BUG() \ do { \ asm volatile("\n" \ @@ -33,10 +42,12 @@ "\t.align 4\n" \ "2:\t" __BUG_REL(1b) "\n" \ "\t" __BUG_REL(%c0) "\n" \ - "\t.short %1, %2\n" \ - "\t.blockz %3-2*4-2*2\n" \ + "\t" __BUG_FUNC_PTR "\n" \ + "\t.short %c2, %c3\n" \ + "\t.blockz %c4-(.-2b)\n" \ "\t.popsection" \ - : : "i" (__FILE__), "i" (__LINE__), \ + : : "i" (__FILE__), "i" (__BUG_FUNC), \ + "i" (__LINE__), \ "i" (0), "i" (sizeof(struct bug_entry)) ); \ unreachable(); \ } while(0) @@ -58,10 +69,12 @@ "\t.align 4\n" \ "2:\t" __BUG_REL(1b) "\n" \ "\t" __BUG_REL(%c0) "\n" \ - "\t.short %1, %2\n" \ - "\t.blockz %3-2*4-2*2\n" \ + "\t" __BUG_FUNC_PTR "\n" \ + "\t.short %c2, %3\n" \ + "\t.blockz %c4-(.-2b)\n" \ "\t.popsection" \ - : : "i" (__FILE__), "i" (__LINE__), \ + : : "i" (__FILE__), "i" (__BUG_FUNC), \ + "i" (__LINE__), \ "i" (BUGFLAG_WARNING|(flags)), \ "i" (sizeof(struct bug_entry)) ); \ } while(0) @@ -74,7 +87,7 @@ "\t.align 4\n" \ "2:\t" __BUG_REL(1b) "\n" \ "\t.short %0\n" \ - "\t.blockz %1-4-2\n" \ + "\t.blockz %c1-(.-2b)\n" \ "\t.popsection" \ : : "i" (BUGFLAG_WARNING|(flags)), \ "i" (sizeof(struct bug_entry)) ); \ -- 2.39.2