From patchwork Tue Mar 12 17:03:03 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guenter Roeck X-Patchwork-Id: 13590378 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 14227C54E5D for ; Tue, 12 Mar 2024 17:03:35 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F1E1D112F2D; Tue, 12 Mar 2024 17:03:33 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="SlTVO3aE"; dkim-atps=neutral Received: from mail-pf1-f177.google.com (mail-pf1-f177.google.com [209.85.210.177]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4981D112F2B for ; Tue, 12 Mar 2024 17:03:32 +0000 (UTC) Received: by mail-pf1-f177.google.com with SMTP id d2e1a72fcca58-6e5a232fe80so45150b3a.0 for ; Tue, 12 Mar 2024 10:03:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1710263012; x=1710867812; darn=lists.freedesktop.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=mgfFEM0oJIh4ATTR993DWw0sPyKQH24EY/4/QOUPczo=; b=SlTVO3aETEiYFkmDsh/Iy/ssVof/ajdSWGUUT2GKA1UUAGP5IJh6jR/aqB7/XlPGsM OlHtYW2fTS6lpvKoYOx5aX+E8FBu0+/wYIPUK7JPohdXHc9hIxZFnI4ohJ9HFqWJ/o4C t1Q70MtfsmhBCx463G1wet+/G0AI3k+ZDDrfTXXEqN7r3BYWZKsDwAkGYQZ6JipMIxDN UuauSgajde+g/XCyynAWDfXn5fzWdN6jPmbSE7JATPlJHFMvRAvRUR5UiXEhMV6F1iH/ aXzUT/e0Frytcp/dfWyknZoaAUmYYU/IlanmZYwo/kFXW9kTUgzsKFtvTX/eZDOJd7C3 zAMg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1710263012; x=1710867812; 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=mgfFEM0oJIh4ATTR993DWw0sPyKQH24EY/4/QOUPczo=; b=ffBQ2coz6s32RPre4/tFXzQX3uXb1r//9IcXgbPiRp4s2qh9Kiknyy7GZ9d6aVmaRk NUzTsxbLqFUDAlozVnHOzfxRr1lkNe89Zxh075Pf8Tev9AjWrfYox8V+c9iJwG43vl1F sp4+Qj/bczrgztlZyUXyVwFfej63aqG1mDE7ktElEuaUZaqpI3ZwCImKPYQkFCCl7XFJ iCd3q4+7bKIWvZCrVrtFnjz4qXYBURORKSW42rpZ8TOJFvdnWyEaeQ2tWZ96LJ/QScVf iPHd6Zljsu22UFl7BnvPWz2Dce41Fb1c/dihOSgNeYkMSpUsNLj53eAJXhbFwEI4Z4H5 +qbg== X-Forwarded-Encrypted: i=1; AJvYcCXa6G1fidiY72/wHkKJkQyStJkDus5bzj8qEk0BRorQuM3s4J3cmBAvv6Wzqmdy36mxD677jos2JG750k/NXb6R7OvuwxIsnZDCt99Oc85S X-Gm-Message-State: AOJu0YwlW5w27968O4Fr2emtxHqdIPXzv9z8X8CD1k90FJgyYv/droxk 0x/KReblDRIiAHq3AfqfUwWZdBKc9xoSCrrSj5WC+sDHKPVocIRk X-Google-Smtp-Source: AGHT+IFq2CL0ds18qlKLUiBCru+tEydVmq2O3jl6A2X5cUl3NOOBJhsozkjJ4JcvCmlm7vgxw0hJ7g== X-Received: by 2002:a05:6a00:3a0c:b0:6e6:96cb:3ab8 with SMTP id fj12-20020a056a003a0c00b006e696cb3ab8mr29726pfb.10.1710263011492; Tue, 12 Mar 2024 10:03:31 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id 29-20020a63125d000000b005dc98d9114bsm6228742pgs.43.2024.03.12.10.03.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Mar 2024 10:03:30 -0700 (PDT) From: Guenter Roeck To: linux-kselftest@vger.kernel.org Cc: David Airlie , Arnd Bergmann , =?utf-8?q?Ma=C3=ADra_Canal?= , Dan Carpenter , Kees Cook , Daniel Diaz , David Gow , Arthur Grillo , Brendan Higgins , Naresh Kamboju , Maarten Lankhorst , Andrew Morton , Maxime Ripard , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , Daniel Vetter , Thomas Zimmermann , dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, loongarch@lists.linux.dev, netdev@lists.linux.dev, Guenter Roeck Subject: [PATCH 08/14] arm64: Add support for suppressing warning backtraces Date: Tue, 12 Mar 2024 10:03:03 -0700 Message-Id: <20240312170309.2546362-9-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240312170309.2546362-1-linux@roeck-us.net> References: <20240312170309.2546362-1-linux@roeck-us.net> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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 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). Signed-off-by: Guenter Roeck --- arch/arm64/include/asm/asm-bug.h | 29 +++++++++++++++++++---------- arch/arm64/include/asm/bug.h | 8 +++++++- 2 files changed, 26 insertions(+), 11 deletions(-) diff --git a/arch/arm64/include/asm/asm-bug.h b/arch/arm64/include/asm/asm-bug.h index c762038ba400..6884089a7191 100644 --- a/arch/arm64/include/asm/asm-bug.h +++ b/arch/arm64/include/asm/asm-bug.h @@ -8,36 +8,45 @@ #include #ifdef CONFIG_DEBUG_BUGVERBOSE -#define _BUGVERBOSE_LOCATION(file, line) __BUGVERBOSE_LOCATION(file, line) -#define __BUGVERBOSE_LOCATION(file, line) \ + +#if IS_ENABLED(CONFIG_KUNIT) +# define HAVE_BUG_FUNCTION +# define __BUG_FUNC_PTR(func) .long func - .; +#else +# define __BUG_FUNC_PTR(func) +#endif + +#define _BUGVERBOSE_LOCATION(file, func, line) __BUGVERBOSE_LOCATION(file, func, line) +#define __BUGVERBOSE_LOCATION(file, func, line) \ .pushsection .rodata.str,"aMS",@progbits,1; \ 14472: .string file; \ .popsection; \ \ .long 14472b - .; \ + __BUG_FUNC_PTR(func) \ .short line; #else -#define _BUGVERBOSE_LOCATION(file, line) +#define _BUGVERBOSE_LOCATION(file, func, line) #endif #ifdef CONFIG_GENERIC_BUG -#define __BUG_ENTRY(flags) \ +#define __BUG_ENTRY(flags, func) \ .pushsection __bug_table,"aw"; \ .align 2; \ 14470: .long 14471f - .; \ -_BUGVERBOSE_LOCATION(__FILE__, __LINE__) \ - .short flags; \ +_BUGVERBOSE_LOCATION(__FILE__, func, __LINE__) \ + .short flags; \ .popsection; \ 14471: #else -#define __BUG_ENTRY(flags) +#define __BUG_ENTRY(flags, func) #endif -#define ASM_BUG_FLAGS(flags) \ - __BUG_ENTRY(flags) \ +#define ASM_BUG_FLAGS(flags, func) \ + __BUG_ENTRY(flags, func) \ brk BUG_BRK_IMM -#define ASM_BUG() ASM_BUG_FLAGS(0) +#define ASM_BUG() ASM_BUG_FLAGS(0, .) #endif /* __ASM_ASM_BUG_H */ diff --git a/arch/arm64/include/asm/bug.h b/arch/arm64/include/asm/bug.h index 28be048db3f6..044c5e24a17d 100644 --- a/arch/arm64/include/asm/bug.h +++ b/arch/arm64/include/asm/bug.h @@ -11,8 +11,14 @@ #include +#ifdef HAVE_BUG_FUNCTION +# define __BUG_FUNC __func__ +#else +# define __BUG_FUNC NULL +#endif + #define __BUG_FLAGS(flags) \ - asm volatile (__stringify(ASM_BUG_FLAGS(flags))); + asm volatile (__stringify(ASM_BUG_FLAGS(flags, %c0)) : : "i" (__BUG_FUNC)); #define BUG() do { \ __BUG_FLAGS(0); \