From patchwork Tue Sep 24 11:47:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Jason A. Donenfeld" X-Patchwork-Id: 13810845 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 08DA912BF25; Tue, 24 Sep 2024 11:50:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727178616; cv=none; b=qIxCLBSZ7Iv1rrtOVovpPnPIyjLNTkl5PmR8vuC6kOLqBe2sopVjB5+VCe5+paLGS6RRbNE8QLkjvwWZ1sT3W/eQ0LzAnUAw5H7R8/uew/GSWlC28acwTiu6fm6EcT4IQAZSo9YfpX2YXT1NuV9Mzm8T3BxPvsBSuCWKvA0yV5o= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727178616; c=relaxed/simple; bh=B0vGTGuGETOSe4/CrulkHq90ReEW/9D1uyFMYsYhYFk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YJp6lSxU0+S4G8xoSeA66MvcGKceFej4XfAShLRvPlHmAwFc89MQN/z7Of//FrIWxwGQ500/xJTxTYWb3mZLW8kJM4C7KZL4roHmuLCXJXxodXu4y16JJh4gKGgv013z2q+anOSiE9LmsEybWDhI62vTodcL8El1Y0tGHv/Y4ik= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=zx2c4.com header.i=@zx2c4.com header.b=iHFYVVVL; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=zx2c4.com header.i=@zx2c4.com header.b="iHFYVVVL" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B4AE3C4CEC4; Tue, 24 Sep 2024 11:50:14 +0000 (UTC) Authentication-Results: smtp.kernel.org; dkim=pass (1024-bit key) header.d=zx2c4.com header.i=@zx2c4.com header.b="iHFYVVVL" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zx2c4.com; s=20210105; t=1727178612; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7o71oK5hozmjw/7c4MUUMAtZ3Jk8dSM5xTWF5ssidyw=; b=iHFYVVVLVpYaUgy/T0qXm50B5e/1eF9YN4TQxUJwustv/MzWTgl0tY8ugG3EBf9eXpZU7C Kyj5kW4MbLeAxXFEa0YhaER9goXFpaBGiWeUNnVGfUDCoMDnE9IzbBc0u/ZKvfa0b7G/1N KIkpiYK2vTjnQ/NF7AgKWHZUg/9qCEM= Received: by mail.zx2c4.com (ZX2C4 Mail Server) with ESMTPSA id 8c0faff3 (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO); Tue, 24 Sep 2024 11:50:12 +0000 (UTC) From: "Jason A. Donenfeld" To: christophe.leroy@csgroup.eu, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, skhan@linuxfoundation.org Cc: "Jason A. Donenfeld" , kernel test robot Subject: [PATCH] selftests: vDSO: align stack for O2-optimized memcpy Date: Tue, 24 Sep 2024 13:47:23 +0200 Message-ID: <20240924115001.916112-1-Jason@zx2c4.com> In-Reply-To: <202409241558.98e13f6f-oliver.sang@intel.com> References: <202409241558.98e13f6f-oliver.sang@intel.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 When switching on -O2, gcc generates SSE2 instructions that assume a 16-byte aligned stack, which the standalone test's start point wasn't aligning. Fix this with the usual alignnent sequence. Fixes: ecb8bd70d51 ("selftests: vDSO: build tests with O2 optimization") Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-lkp/202409241558.98e13f6f-oliver.sang@intel.com Signed-off-by: Jason A. Donenfeld --- tools/testing/selftests/vDSO/vdso_standalone_test_x86.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/vDSO/vdso_standalone_test_x86.c b/tools/testing/selftests/vDSO/vdso_standalone_test_x86.c index 27f6fdf11969..644915862af8 100644 --- a/tools/testing/selftests/vDSO/vdso_standalone_test_x86.c +++ b/tools/testing/selftests/vDSO/vdso_standalone_test_x86.c @@ -131,6 +131,8 @@ asm ( "_start:\n\t" #ifdef __x86_64__ "mov %rsp,%rdi\n\t" + "and $-16,%rsp\n\t" + "sub $8,%rsp\n\t" "jmp c_main" #else "push %esp\n\t"