From patchwork Wed Apr 3 13:19:29 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guenter Roeck X-Patchwork-Id: 13616090 Received: from mail-pl1-f170.google.com (mail-pl1-f170.google.com [209.85.214.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F013C14A4E2; Wed, 3 Apr 2024 13:19:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.170 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150399; cv=none; b=aLZDyykgIqPDNtFet9oNzXRl077kc1brD75mHqDtT0aBqEH5fp3vSyBT5sDorzSRnctUOiICUM1nup9vNXJHMfNDVmVHMhe5H9J8ARZWnNwIwUtaV5CdORxkXbXXhMuFH9rl5k25AXSa4wHjQaHRnR65chwAS/PFxe1sZ43YWe8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150399; c=relaxed/simple; bh=B/NNlS2N17miXcHeSXZpo3PO1m06tpCq1/6642pEKOs=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=aklKMliFIZFDZfjBX3LPqp/HkwxbSThU3g9HwKbtbSML55pU2jbQlKDYdmUJIDMd7gA4aWA0a5jbIPdFef1XDpmuO+da/S6TIWZXhCXDgCX6zrZCnTYN6pQFb8KA6Tx1zCrAR4tqA8ywEUKFxkduWBXpjewAJBWgOevyz/ckIXo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=iXNQ3Q8c; arc=none smtp.client-ip=209.85.214.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="iXNQ3Q8c" Received: by mail-pl1-f170.google.com with SMTP id d9443c01a7336-1e0ae065d24so53957425ad.1; Wed, 03 Apr 2024 06:19:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712150396; x=1712755196; darn=vger.kernel.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=xkb1tQP+RY53Yd+dTVS3E48OfxPMmEiIEhGf0kaureE=; b=iXNQ3Q8ckZB7Xl0OrRoPRpqZTj30O6GcF3YO7bhRvrBfHpJYzPdfik6fCbsnlYdZar fFgpCybxt2qp+OkZtB1lJwCWuoAA9Y7SzVQsfpeTefZQZFhyE0bwPd22PCm+WMf1xVQ+ SB+3IKeFbrnlWBlScNWM2f0eJTxzEwUzEbuwbIAIYkVTLysfv59NenAhUOUwwr9DUtGk PFs8mNnisZqKwp9vdmO3oc9JxiegbJNyZNOf3oQfXh/Lr/xCY8lixOhgfTLAW0OCrISF EhvpLsgaighfTSqUoxbkGfwVWXtowi51kTbfcdqjTB7nmq89BynKXrQ1ZcIk5tt4uyR9 +rMw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712150396; x=1712755196; 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=xkb1tQP+RY53Yd+dTVS3E48OfxPMmEiIEhGf0kaureE=; b=vTjfbMClDbErmN7RE1jfNmofgbd1tcsddISsLnNE1/xVXNcCVNFXGhsYZY99QGfjGd 9Qmr2eXQmY6L/RkpZVxLPGS60+xitaDqDsLkSlwxmfz1BYHpHRe8Bo+AZ2Vux8UNFpEQ Dc9bkB2F4la7/5dxqvfy76DG8bDxProYzcxDlYu+I6xoMJQKqlReFVD3pWGl4rLyxprd isv6R401YxoTGuPSFlCIYjQbb4VYCbNiMqCp2UyMoWe6OjTzxmgor+TIyIpPQet9FgyK +fvhuThMp2fBpgJBa3BxeRhT3PR0AnQ/qLhb2/E26cS7CmggBdU6zTYc9/CFrG8zJw4A k8Lg== X-Forwarded-Encrypted: i=1; AJvYcCXc3I5Od6B++mkm9lJxAtxPRYVdt45H2NbvUy2mdxr/N6O42WK1kDu0gNpqQ4hMMqqIJ4njKxNKVJl/hmqEUTSO8+p7anFWr2gVL/L77X28ClSRnrO/TZI+uQ/1qiF6PbJJIIn9kq+c2owdQa2r24tLIm71nyJQWJBMqiRXKXO5Y18dcS+dDN7yZ3K8rmIih5FPFwh3PBPNUi5XAzSTXlsdc0ve/fqJtph/236XY9DpGVFGtxNHxN4hnsIP4FqBcPDHmuCDpZq8TEPOk3+0FSfaJW2IlqdoBhN9e6PYy0J28YDwpawH7o9QniaCb4MPww== X-Gm-Message-State: AOJu0YzVjV17doZGHC+ByYnl58v51HpFDRY8oUiJ+GNJQh2UnB4YFg6H np0dynEs42HD+NBvMjPVOs6rA/dKkpB+/VAkSsVYhuWCnoh+SOCg/E9Qk6nR X-Google-Smtp-Source: AGHT+IEFIYqOYVWwVKGxmRZLqxD45VjqdbvtvChfTBAzSn1B79yxhWl03nHs5HLMNlC5fEEyMMkQQQ== X-Received: by 2002:a17:903:249:b0:1e0:1486:e808 with SMTP id j9-20020a170903024900b001e01486e808mr16191679plh.13.1712150396344; Wed, 03 Apr 2024 06:19:56 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id l9-20020a170903120900b001e02875930asm13195748plh.25.2024.04.03.06.19.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 06:19:55 -0700 (PDT) Sender: Guenter Roeck 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@vger.kernel.org, x86@kernel.org, Guenter Roeck , Linux Kernel Functional Testing , Catalin Marinas , Will Deacon Subject: [PATCH v3 08/15] arm64: Add support for suppressing warning backtraces Date: Wed, 3 Apr 2024 06:19:29 -0700 Message-Id: <20240403131936.787234-9-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> Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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: Catalin Marinas Cc: Will Deacon 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/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..c6d22e3cd840 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) \ + +#ifdef CONFIG_KUNIT_SUPPRESS_BACKTRACE +# 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); \