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=-31.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 04459C433E0 for ; Thu, 11 Feb 2021 02:52:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B3BB664E26 for ; Thu, 11 Feb 2021 02:52:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229734AbhBKCwo (ORCPT ); Wed, 10 Feb 2021 21:52:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60736 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229665AbhBKCwj (ORCPT ); Wed, 10 Feb 2021 21:52:39 -0500 Received: from mail-qt1-x84a.google.com (mail-qt1-x84a.google.com [IPv6:2607:f8b0:4864:20::84a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 62D24C061756 for ; Wed, 10 Feb 2021 18:51:59 -0800 (PST) Received: by mail-qt1-x84a.google.com with SMTP id v3so1889330qte.0 for ; Wed, 10 Feb 2021 18:51:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=X7hsd6YoqSU3QOkH9Rww2PvhQN7iVOHiNC9z6sY88Qw=; b=JERg3RTi/YSAsxDt581kKZvol+sVk4Lu/Z4w3KksQUuyCN4AcR/rQE+BMQoLQvqUGj XSZ5n6HsAlmPbnDbQ/XgtRYR1bXAWy6bmHqCLvlomp+F+5gxpXQ8BF/tKnWct/OFPacC h/pVdGDTpB3hTzts45NX4kt1MjDtBqFJitIqkjLyAkeWPheOaxlkKVwMsxJp0WI4+AkR ehP0iF4LFXwmFeVJhzeksq6esoVUlfyKmi1xpSWW34teDPDSSRSuolNicj7pz7E53sOX eppB3HZVg95ECSedHauQg6PfZDcbzMMztjs2m4JNjzHNa2EAr2V+iIcY8YQsG9Rkj1bq VJCQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=X7hsd6YoqSU3QOkH9Rww2PvhQN7iVOHiNC9z6sY88Qw=; b=nLlfvPIdwn3o1zhrwhl7YVj1b81aGeodG+4bj/bfiW8M6KhonKD2QHlUqdaqr58IuR 2xWr+xvQgMjMmw+2Yf/8McmdihKjRPXhRrDtrTa6ftCIWIW5xeyuaAk1ABoMAYo0Uc/e PKYtTdq3FcPCgaNUBF8UWhn9QqnFT2F9/iiCVkFFl4CReEPVehH4HtIY8v4cKkfT22Na 2HiU2b9gSVpQ9iVZqk0pxU5sNRk+4iBfDCAIb2Iwup8nIRmpGIu+I0eyo3y4mXM8Xror P6UMZdA0Zl6dByVRk3t01f32kCJkXU50dFOICCZv3t3WJN5peYFHO8tf0c5pesMU+Bqh FPDQ== X-Gm-Message-State: AOAM533NcmA/Bn8mX/u4+c9mIlL49vYDWSJYhZpIyUYPLbVQdtPWOY8i UkBF0N54s20I0uhGfX2GG40oGSTGkAm1ILdeE4Q= X-Google-Smtp-Source: ABdhPJxOjdh2pe+SR86iowGOlBqbu2s4elij+Ij2Ra1DA0N0ImOH8DlhPiJmBvDqueT6WovuBRxRmtZC+kUvUxgJUQ0= Sender: "ndesaulniers via sendgmr" X-Received: from ndesaulniers1.mtv.corp.google.com ([2620:15c:211:202:1dc:8608:b4eb:4dd0]) (user=ndesaulniers job=sendgmr) by 2002:a0c:ac43:: with SMTP id m3mr6010448qvb.37.1613011918613; Wed, 10 Feb 2021 18:51:58 -0800 (PST) Date: Wed, 10 Feb 2021 18:51:48 -0800 In-Reply-To: <20210211025149.3544593-1-ndesaulniers@google.com> Message-Id: <20210211025149.3544593-2-ndesaulniers@google.com> Mime-Version: 1.0 References: <20210211025149.3544593-1-ndesaulniers@google.com> X-Mailer: git-send-email 2.30.0.478.g8a0d178c01-goog Subject: [PATCH v5 1/2] ARM: kprobes: fix UNPREDICTABLE warnings From: Nick Desaulniers To: Russell King , Arnd Bergmann , Ard Biesheuvel Cc: clang-built-linux@googlegroups.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Nathan Chancellor , Peter Smith , Renato Golin , David Spickett , Nick Desaulniers , "kernelci . org bot" Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org GNU as warns twice for this file: Warning: using r15 results in unpredictable behaviour via the Arm ARM: K1.1.1 Overview of the constraints on Armv7 UNPREDICTABLE behaviors The term UNPREDICTABLE describes a number of cases where the architecture has a feature that software must not use. Link: https://github.com/ClangBuiltLinux/linux/issues/1271 Link: https://reviews.llvm.org/D95586 Reported-by: kernelci.org bot Suggested-by: Peter Smith Suggested-by: Renato Golin Suggested-by: David Spickett Signed-off-by: Nick Desaulniers --- arch/arm/probes/kprobes/test-arm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/probes/kprobes/test-arm.c b/arch/arm/probes/kprobes/test-arm.c index 977369f1aa48..2543106a203e 100644 --- a/arch/arm/probes/kprobes/test-arm.c +++ b/arch/arm/probes/kprobes/test-arm.c @@ -166,10 +166,10 @@ void kprobe_arm_test_cases(void) /* Data-processing with PC as a target and status registers updated */ TEST_UNSUPPORTED("movs pc, r1") - TEST_UNSUPPORTED("movs pc, r1, lsl r2") + TEST_UNSUPPORTED(__inst_arm(0xe1b0f211) " @movs pc, r1, lsl r2") TEST_UNSUPPORTED("movs pc, #0x10000") TEST_UNSUPPORTED("adds pc, lr, r1") - TEST_UNSUPPORTED("adds pc, lr, r1, lsl r2") + TEST_UNSUPPORTED(__inst_arm(0xe09ef211) " @adds pc, lr, r1, lsl r2") TEST_UNSUPPORTED("adds pc, lr, #4") /* Data-processing with SP as target */ -- 2.30.0.478.g8a0d178c01-goog