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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C011EC352A3 for ; Mon, 10 Feb 2020 10:17:44 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9186720733 for ; Mon, 10 Feb 2020 10:17:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="cA/GarH8"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="aOU4AV6D" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9186720733 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=armlinux.org.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Date:Message-Id:MIME-Version:Subject:To :From:Reply-To:Cc:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=pL8i/3dLyL9XIDlUA6TeCRejVL1+SmnEAh8yOsgS7KM=; b=cA/GarH8RRrlKv FbrnJlVVOrcFwVeXoEHyzdxC24gJLPXsbjs6hXoWIgFWq11HodCS/Acf/w9FgsHOHJZWkALuZsVBe NN6ZLFIgxh7+hPqLSlMbGH5Mj0yNH+rHamN7qZfmarLzXr/TyGnJgHfzTJgHbox/2iNARWx8eyfa2 29+aJGrFWBZRMhJj/3bt783sED22Q/K7/uCmAp5OhJtVvvxt5SfLQBYOIkgB7TwmF9YmrMY7lrNPs Lx1bYo1Dwrz/JYN5WRO43s9/AQD5IBlnk61VH1IL7DcpGuHQvTNDoq8p/O1U7tpE3yS7J2CQZadst rmw6DJ7swaYhYNOpJNBQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j168K-0003Sf-RI; Mon, 10 Feb 2020 10:17:40 +0000 Received: from pandora.armlinux.org.uk ([2001:4d48:ad52:3201:214:fdff:fe10:1be6]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1j168I-0002rR-87 for linux-arm-kernel@lists.infradead.org; Mon, 10 Feb 2020 10:17:39 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Date:Sender:Message-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:Subject:To:From:Reply-To:Cc:Content-ID :Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To: Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=eMz09a6YKzgI2+eat6dObdocEEZZF71ptqYTvO8FOgQ=; b=aOU4AV6Dk07jZkMEasYC0SHXlm JSquBGoft3FHlXtFUUOsOjY+o7TX7zvS3KDhS+558mHCbUsaNYHLrq6LvE75qMUDVW1bOjPnaqyT5 y/i4ofUZdN1SAtPhZwc/I39QWxGTv4OCXKp72LrCrCAw7TCdiPDpPYh+EiQUCBFfWkxX4E2LWeuXG 5QiwsX11f0lZfbPweyNOg5vLsTKh9WUaNffsdxK7shvsEh8PdplChtC0vz8EIIFUoEzzG7Kxe1OOp mj3z3VKS3ID60kXGq5rz+RBDLDCVayDz4z1Og7Fv3J86DmZb5e7lCwnqGDkpOwv6qYy1pRLkMzxik aqSo1W4Q==; Received: from e0022681537dd.dyn.armlinux.org.uk ([fd8f:7570:feb6:1:222:68ff:fe15:37dd]:43382 helo=rmk-PC.armlinux.org.uk) by pandora.armlinux.org.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.90_1) (envelope-from ) id 1j166E-00064d-IJ; Mon, 10 Feb 2020 10:15:30 +0000 Received: from rmk by rmk-PC.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1j166D-0005ct-VG; Mon, 10 Feb 2020 10:15:30 +0000 From: Russell King To: linux-arm-kernel@lists.infradead.org Subject: [PATCH] ARM: allow unwinder to unwind recursive functions MIME-Version: 1.0 Content-Disposition: inline Message-Id: Date: Mon, 10 Feb 2020 10:15:29 +0000 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200210_021738_290526_B7AA8BE1 X-CRM114-Status: GOOD ( 10.41 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Allow the unwinder to unwind recursive functions if the stack makes progress, even if the PC is the same. This allows tracing through recursive __switchdev_handle_port_attr_set() and similar. Signed-off-by: Russell King --- arch/arm/kernel/unwind.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/kernel/unwind.c b/arch/arm/kernel/unwind.c index 4574e6aea0a5..11a964fd66f4 100644 --- a/arch/arm/kernel/unwind.c +++ b/arch/arm/kernel/unwind.c @@ -444,7 +444,7 @@ int unwind_frame(struct stackframe *frame) ctrl.vrs[PC] = ctrl.vrs[LR]; /* check for infinite loop */ - if (frame->pc == ctrl.vrs[PC]) + if (frame->pc == ctrl.vrs[PC] && frame->sp == ctrl.vrs[SP]) return -URC_FAILURE; frame->fp = ctrl.vrs[FP]; -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel