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=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED 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 6BBADC67863 for ; Mon, 22 Oct 2018 09:42:33 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (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 1668920652 for ; Mon, 22 Oct 2018 09:42:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1668920652 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 42ds4l0BqwzDrTg for ; Mon, 22 Oct 2018 20:42:31 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Received: from ozlabs.org (bilbo.ozlabs.org [203.11.71.1]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 42drvm5DYkzDrYZ for ; Mon, 22 Oct 2018 20:34:44 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Received: by ozlabs.org (Postfix, from userid 1034) id 42drvm4VXxz9sD3; Mon, 22 Oct 2018 20:34:44 +1100 (AEDT) X-powerpc-patch-notification: thanks X-powerpc-patch-commit: 7cd01b08d35f1b7d55686ed8cd57c94d3406ec8f In-Reply-To: <20180607095202.29189-1-naveen.n.rao@linux.vnet.ibm.com> To: "Naveen N. Rao" From: Michael Ellerman Subject: Re: [v3] powerpc: Add support for function error injection Message-Id: <42drvm4VXxz9sD3@ozlabs.org> Date: Mon, 22 Oct 2018 20:34:43 +1100 (AEDT) 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: linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Thu, 2018-06-07 at 09:52:02 UTC, "Naveen N. Rao" wrote: > We implement regs_set_return_value() and override_function_with_return() > for this purpose. > > On powerpc, a return from a function (blr) just branches to the location > contained in the link register. So, we can just update pt_regs rather > than redirecting execution to a dummy function that returns. > > Signed-off-by: Naveen N. Rao > Reviewed-by: Samuel Mendoza-Jonas Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/7cd01b08d35f1b7d55686ed8cd57c9 cheers