Received: by 2002:a25:4158:0:0:0:0:0 with SMTP id o85csp727011yba; Thu, 18 Apr 2019 08:35:07 -0700 (PDT) X-Google-Smtp-Source: APXvYqzU0gsgPstxGwsP06DucGPWh/GyIvcflLFVgycupwZ3SobVi1ojQ+P/OHCRp8ajgo6HN6kU X-Received: by 2002:a17:902:e48f:: with SMTP id cj15mr95609084plb.256.1555601707724; Thu, 18 Apr 2019 08:35:07 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1555601707; cv=none; d=google.com; s=arc-20160816; b=ClSahuzyc/kREyqhAIDRc10JY5q8Cb4lodRH8i4/qMXN0Iy1Rkzc4uk2JIobUgI9ru zP5BWyoZtaLlJU11+Ph+D9rpIeYlFm6DwvxgAPUZvRy831pJdDExFYMarKA17j6JoaFO 9yjXr3zh00tIhR8ynb/pA8Kp2IN/q0hP+VYUW8qDszKW2EVpERx+K15wVmPBot7yjPaV KjN5vPZB7W8Ui9nzv2KSnTRflVUtuM0uj0HJZtAvvU9vcNR/XJ0z2ICeaEeHh0XODINr 6LodmbZvidJxfJz4GmIhsVMqtXPjLbLidpYFEHMMzhBr58D9hnYqrEAah7CzAzPamHA3 SMmw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:content-transfer-encoding :content-id:nodisclaimer:user-agent:content-language:accept-language :in-reply-to:references:message-id:date:thread-index:thread-topic :subject:cc:to:from:dkim-signature; bh=WFz3jyAEM2LkXnZ5xCKQKhvNkgUyrEK1xo73LRYbJPw=; b=JDGEoDrh2XL8F9QI1Y77Y+4YQTfSfPC0tvp+oruzsx1XzxEmMsLDxqm7F9EoE3kQXa zsAHTrJZOLk8WXzTO5wYNhPXdibzy+Wg5+aXSQ8LhUL+m/9pYu/PYQMh5rfaeYxlJhw5 MPdn0yH5ylJ4HiFX8d37BGG0KTq+VmemDr/dCdPCW7IKsbStYKNYo161fEOQ60RYX8HW GCH0z0f+ue/DY+M9Cbyke62F2fflj28qCAo+V/03z+kdcKp2Y5Is7GCTpqooF4Fij1I7 CZmmkxe/ug/W3P30ZJaaYSCOeqNrgsOBmZ2/ozJ8R/S6R6lzU4S/ypKRUrS3VV5qidUe Ulvg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@armh.onmicrosoft.com header.s=selector1-arm-com header.b=UJJBKKEq; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id r17si2018818pgv.128.2019.04.18.08.34.52; Thu, 18 Apr 2019 08:35:07 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@armh.onmicrosoft.com header.s=selector1-arm-com header.b=UJJBKKEq; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389133AbfDRPeA (ORCPT + 99 others); Thu, 18 Apr 2019 11:34:00 -0400 Received: from mail-eopbgr40045.outbound.protection.outlook.com ([40.107.4.45]:31207 "EHLO EUR03-DB5-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2388277AbfDRPeA (ORCPT ); Thu, 18 Apr 2019 11:34:00 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=armh.onmicrosoft.com; s=selector1-arm-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=WFz3jyAEM2LkXnZ5xCKQKhvNkgUyrEK1xo73LRYbJPw=; b=UJJBKKEqUF1pjTscE5PjLvId5hXu61SY35T5E26h0tNTd6cVmOW7hZfwJZqDtgDMmLabrZ6v7m+QKBoWTYbMohVMagM9Q+F6cm9WXbBf67gm5LasytYz8rpzqJlfeNrJwICTDHWF/b69LjuHJB/OtYpNAKzavO55bJXdWgx4XQk= Received: from VI1PR08MB4223.eurprd08.prod.outlook.com (20.178.13.96) by VI1PR08MB4448.eurprd08.prod.outlook.com (20.179.24.210) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1813.14; Thu, 18 Apr 2019 15:33:13 +0000 Received: from VI1PR08MB4223.eurprd08.prod.outlook.com ([fe80::11b9:f687:dc3e:68cc]) by VI1PR08MB4223.eurprd08.prod.outlook.com ([fe80::11b9:f687:dc3e:68cc%3]) with mapi id 15.20.1813.011; Thu, 18 Apr 2019 15:33:13 +0000 From: Szabolcs Nagy To: Mathieu Desnoyers , Joseph Myers , Will Deacon CC: nd , carlos , Florian Weimer , libc-alpha , Thomas Gleixner , Ben Maurer , Peter Zijlstra , "Paul E. McKenney" , Boqun Feng , Dave Watson , Paul Turner , Rich Felker , linux-kernel , linux-api Subject: Re: [PATCH 1/5] glibc: Perform rseq(2) registration at C startup and thread creation (v8) Thread-Topic: [PATCH 1/5] glibc: Perform rseq(2) registration at C startup and thread creation (v8) Thread-Index: AQHU9HpbUigwBDiNHkaVVFlkWH4PtKZAhB6AgAAE+oCAAD0+gIABIvSAgAAl0IA= Date: Thu, 18 Apr 2019 15:33:13 +0000 Message-ID: <6cbfea7b-9d83-74a5-9cd2-af56a5d68818@arm.com> References: <20190416173216.9028-1-mathieu.desnoyers@efficios.com> <20190416173216.9028-2-mathieu.desnoyers@efficios.com> <364803063.586.1555516769056.JavaMail.zimbra@efficios.com> <1770787324.668.1555530989646.JavaMail.zimbra@efficios.com> <1066731871.915.1555593471194.JavaMail.zimbra@efficios.com> In-Reply-To: <1066731871.915.1555593471194.JavaMail.zimbra@efficios.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Mozilla/5.0 (X11; Linux aarch64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 x-originating-ip: [217.140.106.51] x-clientproxiedby: LO2P265CA0147.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:9::15) To VI1PR08MB4223.eurprd08.prod.outlook.com (2603:10a6:803:b5::32) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Szabolcs.Nagy@arm.com; x-ms-exchange-messagesentrepresentingtype: 1 x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 3ec162ab-aaf2-4387-65c8-08d6c4132b37 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600141)(711020)(4605104)(4618075)(2017052603328)(7193020);SRVR:VI1PR08MB4448; x-ms-traffictypediagnostic: VI1PR08MB4448: nodisclaimer: True x-microsoft-antispam-prvs: x-forefront-prvs: 0011612A55 x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(376002)(136003)(346002)(396003)(39860400002)(366004)(199004)(189003)(97736004)(31696002)(14454004)(86362001)(65826007)(6246003)(3846002)(53936002)(6636002)(305945005)(6486002)(6116002)(2906002)(31686004)(72206003)(478600001)(64126003)(5660300002)(26005)(386003)(53546011)(6506007)(476003)(68736007)(6512007)(6436002)(7736002)(446003)(2616005)(4326008)(11346002)(486006)(186003)(25786009)(102836004)(52116002)(99286004)(66066001)(229853002)(76176011)(14444005)(93886005)(256004)(8676002)(81166006)(81156014)(8936002)(44832011)(54906003)(110136005)(65956001)(316002)(65806001)(58126008)(7416002)(71190400001)(71200400001)(36756003);DIR:OUT;SFP:1101;SCL:1;SRVR:VI1PR08MB4448;H:VI1PR08MB4223.eurprd08.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; received-spf: None (protection.outlook.com: arm.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: cBGAPBBl9WvMN5c+3jVNHQkSYXJmy0JfJXbfVJSmQzvVl+xDZ4wPeDwFjmLyCBr3AhPxx11V6v/86G7E7THhTxGdlaPauXQdEAlf+DiUnC/szcQS8bIhy0RHDQoEwCDurI7Jm+nDE7QMNcz3AOb/yrdIiW2ESv4JjzptBxjd7KSoZlYMx5cr3/mGaMUbuIAObzk4dckX0ElueYqA9y5Vf8qpLKQAzvs0n39ARDDngclnN/zeptMbinnaFue2IklkQ6ve9T0867ZprTCNhFyYTTmJUvmOnX6h18zOQifKAJPF4kMizgyaZeoc1vFiilwZIOFis1GzpxUWPNJSwdCrliay70GQWAfLlbRHpXYGJWbd13oLV9M5M/GVCByblIK0uDlC5UQqCujnXmvTNUQ7z/TNzilK9De2PlDo+iZ2lH4= Content-Type: text/plain; charset="utf-8" Content-ID: <61F9D6381DCE1B42B91EE635199CCA43@eurprd08.prod.outlook.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-Network-Message-Id: 3ec162ab-aaf2-4387-65c8-08d6c4132b37 X-MS-Exchange-CrossTenant-originalarrivaltime: 18 Apr 2019 15:33:13.3451 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR08MB4448 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org T24gMTgvMDQvMjAxOSAxNDoxNywgTWF0aGlldSBEZXNub3llcnMgd3JvdGU6DQo+IC0tLS0tIE9u IEFwciAxNywgMjAxOSwgYXQgMzo1NiBQTSwgTWF0aGlldSBEZXNub3llcnMgbWF0aGlldS5kZXNu b3llcnNAZWZmaWNpb3MuY29tIHdyb3RlOg0KPj4gLS0tLS0gT24gQXByIDE3LCAyMDE5LCBhdCAx MjoxNyBQTSwgSm9zZXBoIE15ZXJzIGpvc2VwaEBjb2Rlc291cmNlcnkuY29tIHdyb3RlOg0KPj4+ IE9uIFdlZCwgMTcgQXByIDIwMTksIE1hdGhpZXUgRGVzbm95ZXJzIHdyb3RlOg0KPj4+DQo+Pj4+ PiArLyogUlNFUV9TSUcgaXMgYSBzaWduYXR1cmUgcmVxdWlyZWQgYmVmb3JlIGVhY2ggYWJvcnQg aGFuZGxlciBjb2RlLg0KPj4+Pj4gKw0KPj4+Pj4gKyAgIEl0IGlzIGEgMzItYml0IHZhbHVlIHRo YXQgbWFwcyB0byBhY3R1YWwgYXJjaGl0ZWN0dXJlIGNvZGUgY29tcGlsZWQNCj4+Pj4+ICsgICBp bnRvIGFwcGxpY2F0aW9ucyBhbmQgbGlicmFyaWVzLiBJdCBuZWVkcyB0byBiZSBkZWZpbmVkIGZv ciBlYWNoDQo+Pj4+PiArICAgYXJjaGl0ZWN0dXJlLiBXaGVuIGNob29zaW5nIHRoaXMgdmFsdWUs IGl0IG5lZWRzIHRvIGJlIHRha2VuIGludG8NCj4+Pj4+ICsgICBhY2NvdW50IHRoYXQgZ2VuZXJh dGluZyBpbnZhbGlkIGluc3RydWN0aW9ucyBtYXkgaGF2ZSBpbGwgZWZmZWN0cyBvbg0KPj4+Pj4g KyAgIHRvb2xzIGxpa2Ugb2JqZHVtcCwgYW5kIG1heSBhbHNvIGhhdmUgaW1wYWN0IG9uIHRoZSBD UFUgc3BlY3VsYXRpdmUNCj4+Pj4+ICsgICBleGVjdXRpb24gZWZmaWNpZW5jeSBpbiBzb21lIGNh c2VzLiAgKi8NCj4+Pj4+ICsNCj4+Pj4+ICsjZGVmaW5lIFJTRVFfU0lHIDB4ZDQyOGJjMDAJLyog QlJLICMweDQ1RTAuICAqLw0KPj4+Pg0KPj4+PiBBZnRlciBmdXJ0aGVyIGludmVzdGlnYXRpb24s IHdlIHNob3VsZCBwcm9iYWJseSBkbyB0aGUgZm9sbG93aW5nDQo+Pj4+IHRvIGhhbmRsZSBjb21w aWxpbmcgd2l0aCAtbWJpZy1lbmRpYW4gb24gYWFyY2g2NCwgd2hpY2ggZ2VuZXJhdGVzDQo+Pj4+ IGJpbmFyaWVzIHdpdGggbWl4ZWQgY29kZSB2cyBkYXRhIGVuZGlhbm5lc3MgKGxpdHRsZSBlbmRp YW4gY29kZSwNCj4+Pj4gYmlnIGVuZGlhbiBkYXRhKToNCj4+Pg0KPj4+IEZpcnN0LCB0aGUgY29t bWVudCBvbiBSU0VRX1NJRyBzaG91bGQgc3BlY2lmeSB3aGV0aGVyIGl0IGlzIHRvIGJlDQo+Pj4g aW50ZXJwcmV0ZWQgaW4gdGhlIGNvZGUgb3IgdGhlIGRhdGEgZW5kaWFubmVzcy4NCj4+DQo+PiBS aWdodC4gVGhlIHNpZ25hdHVyZSBwYXNzZWQgYXMgYXJndW1lbnQgdG8gdGhlIHJzZXEgcmVnaXN0 cmF0aW9uDQo+PiBzeXN0ZW0gY2FsbCBuZWVkcyB0byBiZSBpbiBkYXRhIGVuZGlhbm5lc3MgKGN1 cnJlbnRseSBleHBvc2VkIGtlcm5lbA0KPj4gQUJJKS4NCj4+DQo+PiBJZGVhbGx5IGZvciB1c2Vy c3BhY2UsIHdlIHdhbnQgdG8gZGVmaW5lIGEgc2lnbmF0dXJlIGluIGNvZGUgZW5kaWFubmVzcw0K Pj4gdGhhdCBoYXBwZW5zIHRvIG5pY2VseSBtYXRjaCBzcGVjaWZpYyBjb2RlIHBhdHRlcm5zLg0K Li4uDQo+IEZvciBhYXJjaDY0LCBJIHRoaW5rIHdlIGNhbiBzaW1wbHkgZG86DQo+IA0KPiAvKg0K PiAgKiBhYXJjaDY0IC1tYmlnLWVuZGlhbiBnZW5lcmF0ZXMgbWl4ZWQgZW5kaWFubmVzcyBjb2Rl IHZzIGRhdGE6DQo+ICAqIGxpdHRsZS1lbmRpYW4gY29kZSBhbmQgYmlnLWVuZGlhbiBkYXRhLiBF bnN1cmUgdGhlIFJTRVFfU0lHIHNpZ25hdHVyZQ0KPiAgKiBtYXRjaGVzIGNvZGUgZW5kaWFubmVz cy4NCj4gICovDQo+ICNkZWZpbmUgUlNFUV9TSUdfQ09ERSAgIDB4ZDQyOGJjMDAgICAgICAvKiBC UksgIzB4NDVFMC4gICovDQo+IA0KPiAjaWZkZWYgX19BUk1fQklHX0VORElBTg0KPiAjZGVmaW5l IFJTRVFfU0lHX0RBVEEgICAweDAwYmMyOGQ0ICAgICAgLyogQlJLICMweDQ1RTAuICAqLw0KPiAj ZWxzZQ0KPiAjZGVmaW5lIFJTRVFfU0lHX0RBVEEgICBSU0VRX1NJR19DT0RFDQo+ICNlbmRpZg0K PiANCj4gI2RlZmluZSBSU0VRX1NJRyAgICAgICAgUlNFUV9TSUdfREFUQQ0KPiANCj4gRmVlZGJh Y2sgaXMgbW9zdCB3ZWxjb21lLA0KDQpzbyB0aGUgUlNFUV9TSUcgdmFsdWUgaXMgc3VwcG9zZWQg dG8gYmUgdXNlZCB3aXRoIC53b3JkDQppbiBhc20gaW5zdGVhZCBvZiAuaW5zdD8NCg0KaSBkb24n dCB0aGluayB3ZSB1c2UgX19BUk1fKiBpbiBwdWJsaWMgaGVhZGVycyBjdXJyZW50bHksDQpidXQg aG9wZWZ1bGx5IGFhcmNoNjRfYmUgY29tcGlsZXJzIGltcGxlbWVudCBpdC4NCg0Kb3RoZXJ3aXNl IHRoaXMgbG9va3Mgb2sgdG8gbWUuDQoNCihpIHRoaW5rIGEgcmFyZSBwYWxpbmRyb21lIGluc3Ry dWN0aW9uIHdvdWxkIHdvcmsgdG9vLCBlLmcuDQowYTVmNWYwYSAJYW5kCXcxMCwgdzI0LCB3enIs IGxzciAjMjMgLy8gc2hpZnRlZCAwDQoyYTVmNWYyYSAJb3JyCXcxMCwgdzI1LCB3enIsIGxzciAj MjMNCmViOWY5ZmViIAluZWdzCXgxMSwgeHpyLCBhc3IgIzM5DQpjODNmM2ZjOCAJc3R4cAl3enIs IHg4LCB4MTUsIFt4MzBdICAvLyBzdG9yZSB0byBMUiBpZ25vcmluZyBzdWNjZXNzDQpkOWZmZmZk OSAJc3R6MmcJeDI1LCBbeDMwLCAjLTE2XSEgICAgLy8gdjguNSB0YWcremVybyAyIGdyYW51bGVz IGFyb3VuZCBMUg0KZXRjLiBpdCBkb2VzIG5vdCBuZWVkIHRvIGJlIGEgZ3VhcmFudGVlZCB0cmFw KQ0K