From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Fri, 22 Aug 2025 04:25:20 +0200 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1upHSz-003AYs-0f for lore@lore.pengutronix.de; Fri, 22 Aug 2025 04:25:20 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1upHSy-0001Uo-2U for lore@pengutronix.de; Fri, 22 Aug 2025 04:25:20 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=p9mc1qfo3Fg4rZSxKg2wrti7Y6kqw6uczjBOPcVjbZQ=; b=qCYJwB92oj/GgbSP93YsQUxiyM WrhTaul7dNsKSh7Pg7quJQASHwX61EMM+Bp1xhJqkneJe/pBbRpbnFs+rgdWDXmJ5y3CxB9wRvt90 zJyqytbg2iqe1dbCPhmo9R0l7oGgCkBRh2C4LKSEtWGeNtbQGjbp6lh6SYMtR1vJRoIpkRly26Qsc ZggtlDVQZdhqW4kQAvYOHnlTBqAbbmvKALyLaszK8hoCDD43F1X4LJrTz5OpqlClBBRNaaSt/IBAh ukAUoEJgUvpKE3G6B/5dln37+p1g+vubm3YCLkKcNLGmKmsNsv+YZkc0lur9zPzqN7AeoWzOCgXAr Qx19v9Gw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1upHSZ-00000001Gxe-3Cqp; Fri, 22 Aug 2025 02:24:55 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1upCOL-00000000bGT-0jry for barebox@lists.infradead.org; Thu, 21 Aug 2025 21:00:14 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1upCOJ-0000h2-Tw; Thu, 21 Aug 2025 23:00:11 +0200 Received: from dude05.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::54]) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1upCOJ-001T57-2O; Thu, 21 Aug 2025 23:00:11 +0200 Received: from localhost ([::1] helo=dude05.red.stw.pengutronix.de) by dude05.red.stw.pengutronix.de with esmtp (Exim 4.96) (envelope-from ) id 1upCOJ-0061XA-25; Thu, 21 Aug 2025 23:00:11 +0200 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: Ahmad Fatoum Date: Thu, 21 Aug 2025 23:00:10 +0200 Message-Id: <20250821210010.1435851-1-a.fatoum@pengutronix.de> X-Mailer: git-send-email 2.39.5 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250821_140013_215624_BD633BD7 X-CRM114-Status: GOOD ( 12.80 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-5.2 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH] common: panic: add new CONFIG_PANIC_TRAP option X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) When running under libfuzzer for example, it's better to trap, so libfuzzer generates a crash input file than to just print an error message and exit gracefully. The same can apply when running under a hardware debugger, so make this option available generally. Signed-off-by: Ahmad Fatoum --- common/Kconfig | 9 +++++++++ common/misc.c | 2 ++ 2 files changed, 11 insertions(+) diff --git a/common/Kconfig b/common/Kconfig index ad211d1fa519..0664ffcb43a5 100644 --- a/common/Kconfig +++ b/common/Kconfig @@ -376,6 +376,7 @@ config RELOCATABLE choice prompt "Configure action on fatal error" + default PANIC_TRAP if SANDBOX default PANIC_RESET config PANIC_POWEROFF @@ -407,6 +408,14 @@ choice fatal error, so you don't have to reset it manually. This is the recommended configuration in production. + config PANIC_TRAP + bool "invoke a trap instruction" + help + This option triggers the trap instruction emitted by + __builtin_trap() on fatal errors. + This is mainly useful when running under a debugger + or debugging instrumentation. + endchoice config PROMPT diff --git a/common/misc.c b/common/misc.c index f2c084a0df4b..67f88af1a3df 100644 --- a/common/misc.c +++ b/common/misc.c @@ -305,6 +305,8 @@ static void __noreturn do_panic(bool stacktrace, const char *fmt, va_list ap) if (IS_ENABLED(CONFIG_PANIC_POWEROFF)) poweroff_machine(0); + else if (IS_ENABLED(CONFIG_PANIC_TRAP)) + __builtin_trap(); else restart_machine(0); } -- 2.39.5