From mboxrd@z Thu Jan 1 00:00:00 1970 From: Szabolcs Nagy Subject: Re: [PATCH 1/5] glibc: Perform rseq(2) registration at C startup and thread creation (v8) Date: Thu, 18 Apr 2019 16:07:39 +0000 Message-ID: <79996d13-2ba2-ed7d-b202-e7d38f1fd870@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> <6cbfea7b-9d83-74a5-9cd2-af56a5d68818@arm.com> <1055153722.1072.1555602067220.JavaMail.zimbra@efficios.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org In-Reply-To: <1055153722.1072.1555602067220.JavaMail.zimbra@efficios.com> Content-ID: <8265BF5BDF73294FB3CC91041CC751B2@eurprd08.prod.outlook.com> To: Mathieu Desnoyers Cc: nd , Joseph Myers , Will Deacon , 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 List-Id: linux-api@vger.kernel.org T24gMTgvMDQvMjAxOSAxNjo0MSwgTWF0aGlldSBEZXNub3llcnMgd3JvdGU6DQo+IC0tLS0tIE9u IEFwciAxOCwgMjAxOSwgYXQgMTE6MzMgQU0sIFN6YWJvbGNzIE5hZ3kgU3phYm9sY3MuTmFneUBh cm0uY29tIHdyb3RlOg0KPiANCj4+IE9uIDE4LzA0LzIwMTkgMTQ6MTcsIE1hdGhpZXUgRGVzbm95 ZXJzIHdyb3RlOg0KPj4+IC0tLS0tIE9uIEFwciAxNywgMjAxOSwgYXQgMzo1NiBQTSwgTWF0aGll dSBEZXNub3llcnMNCj4+PiBtYXRoaWV1LmRlc25veWVyc0BlZmZpY2lvcy5jb20gd3JvdGU6DQo+ Pj4+IC0tLS0tIE9uIEFwciAxNywgMjAxOSwgYXQgMTI6MTcgUE0sIEpvc2VwaCBNeWVycyBqb3Nl cGhAY29kZXNvdXJjZXJ5LmNvbSB3cm90ZToNCj4+Pj4+IE9uIFdlZCwgMTcgQXByIDIwMTksIE1h dGhpZXUgRGVzbm95ZXJzIHdyb3RlOg0KPj4+Pj4NCj4+Pj4+Pj4gKy8qIFJTRVFfU0lHIGlzIGEg c2lnbmF0dXJlIHJlcXVpcmVkIGJlZm9yZSBlYWNoIGFib3J0IGhhbmRsZXIgY29kZS4NCj4+Pj4+ Pj4gKw0KPj4+Pj4+PiArICAgSXQgaXMgYSAzMi1iaXQgdmFsdWUgdGhhdCBtYXBzIHRvIGFjdHVh bCBhcmNoaXRlY3R1cmUgY29kZSBjb21waWxlZA0KPj4+Pj4+PiArICAgaW50byBhcHBsaWNhdGlv bnMgYW5kIGxpYnJhcmllcy4gSXQgbmVlZHMgdG8gYmUgZGVmaW5lZCBmb3IgZWFjaA0KPj4+Pj4+ PiArICAgYXJjaGl0ZWN0dXJlLiBXaGVuIGNob29zaW5nIHRoaXMgdmFsdWUsIGl0IG5lZWRzIHRv IGJlIHRha2VuIGludG8NCj4+Pj4+Pj4gKyAgIGFjY291bnQgdGhhdCBnZW5lcmF0aW5nIGludmFs aWQgaW5zdHJ1Y3Rpb25zIG1heSBoYXZlIGlsbCBlZmZlY3RzIG9uDQo+Pj4+Pj4+ICsgICB0b29s cyBsaWtlIG9iamR1bXAsIGFuZCBtYXkgYWxzbyBoYXZlIGltcGFjdCBvbiB0aGUgQ1BVIHNwZWN1 bGF0aXZlDQo+Pj4+Pj4+ICsgICBleGVjdXRpb24gZWZmaWNpZW5jeSBpbiBzb21lIGNhc2VzLiAg Ki8NCj4+Pj4+Pj4gKw0KPj4+Pj4+PiArI2RlZmluZSBSU0VRX1NJRyAweGQ0MjhiYzAwCS8qIEJS SyAjMHg0NUUwLiAgKi8NCj4+Pj4+Pg0KPj4+Pj4+IEFmdGVyIGZ1cnRoZXIgaW52ZXN0aWdhdGlv biwgd2Ugc2hvdWxkIHByb2JhYmx5IGRvIHRoZSBmb2xsb3dpbmcNCj4+Pj4+PiB0byBoYW5kbGUg Y29tcGlsaW5nIHdpdGggLW1iaWctZW5kaWFuIG9uIGFhcmNoNjQsIHdoaWNoIGdlbmVyYXRlcw0K Pj4+Pj4+IGJpbmFyaWVzIHdpdGggbWl4ZWQgY29kZSB2cyBkYXRhIGVuZGlhbm5lc3MgKGxpdHRs ZSBlbmRpYW4gY29kZSwNCj4+Pj4+PiBiaWcgZW5kaWFuIGRhdGEpOg0KPj4+Pj4NCj4+Pj4+IEZp cnN0LCB0aGUgY29tbWVudCBvbiBSU0VRX1NJRyBzaG91bGQgc3BlY2lmeSB3aGV0aGVyIGl0IGlz IHRvIGJlDQo+Pj4+PiBpbnRlcnByZXRlZCBpbiB0aGUgY29kZSBvciB0aGUgZGF0YSBlbmRpYW5u ZXNzLg0KPj4+Pg0KPj4+PiBSaWdodC4gVGhlIHNpZ25hdHVyZSBwYXNzZWQgYXMgYXJndW1lbnQg dG8gdGhlIHJzZXEgcmVnaXN0cmF0aW9uDQo+Pj4+IHN5c3RlbSBjYWxsIG5lZWRzIHRvIGJlIGlu IGRhdGEgZW5kaWFubmVzcyAoY3VycmVudGx5IGV4cG9zZWQga2VybmVsDQo+Pj4+IEFCSSkuDQo+ Pj4+DQo+Pj4+IElkZWFsbHkgZm9yIHVzZXJzcGFjZSwgd2Ugd2FudCB0byBkZWZpbmUgYSBzaWdu YXR1cmUgaW4gY29kZSBlbmRpYW5uZXNzDQo+Pj4+IHRoYXQgaGFwcGVucyB0byBuaWNlbHkgbWF0 Y2ggc3BlY2lmaWMgY29kZSBwYXR0ZXJucy4NCj4+IC4uLg0KPj4+IEZvciBhYXJjaDY0LCBJIHRo aW5rIHdlIGNhbiBzaW1wbHkgZG86DQo+Pj4NCj4+PiAvKg0KPj4+ICAqIGFhcmNoNjQgLW1iaWct ZW5kaWFuIGdlbmVyYXRlcyBtaXhlZCBlbmRpYW5uZXNzIGNvZGUgdnMgZGF0YToNCj4+PiAgKiBs aXR0bGUtZW5kaWFuIGNvZGUgYW5kIGJpZy1lbmRpYW4gZGF0YS4gRW5zdXJlIHRoZSBSU0VRX1NJ RyBzaWduYXR1cmUNCj4+PiAgKiBtYXRjaGVzIGNvZGUgZW5kaWFubmVzcy4NCj4+PiAgKi8NCj4+ PiAjZGVmaW5lIFJTRVFfU0lHX0NPREUgICAweGQ0MjhiYzAwICAgICAgLyogQlJLICMweDQ1RTAu ICAqLw0KPj4+DQo+Pj4gI2lmZGVmIF9fQVJNX0JJR19FTkRJQU4NCj4+PiAjZGVmaW5lIFJTRVFf U0lHX0RBVEEgICAweDAwYmMyOGQ0ICAgICAgLyogQlJLICMweDQ1RTAuICAqLw0KPj4+ICNlbHNl DQo+Pj4gI2RlZmluZSBSU0VRX1NJR19EQVRBICAgUlNFUV9TSUdfQ09ERQ0KPj4+ICNlbmRpZg0K Pj4+DQo+Pj4gI2RlZmluZSBSU0VRX1NJRyAgICAgICAgUlNFUV9TSUdfREFUQQ0KPj4+DQo+Pj4g RmVlZGJhY2sgaXMgbW9zdCB3ZWxjb21lLA0KPj4NCj4+IHNvIHRoZSBSU0VRX1NJRyB2YWx1ZSBp cyBzdXBwb3NlZCB0byBiZSB1c2VkIHdpdGggLndvcmQNCj4+IGluIGFzbSBpbnN0ZWFkIG9mIC5p bnN0Pw0KPiANCj4gV2Ugd2FudCBhIC5pbnN0IHNvIGl0IHRyYW5zbGF0ZXMgaW50byBhIHZhbGlk IHRyYXAgaW5zdHJ1Y3Rpb24uDQo+IEl0J3MgYmV0dGVyIHRvIHRyYXAgaW4gY2FzZSBwcm9ncmFt IGV4ZWN1dGlvbiByZWFjaGVzIHRoaXMNCj4gYnkgbWlzdGFrZSAobWFrZXMgZGVidWdnaW5nIGVh c2llcikuDQoNCnRoYXQgZG9lcyBub3QgbWFrZSBzZW5zZSB0byBtZS4NCg0KIi5pbnN0IiBpcyBh biBhc20gZGlyZWN0aXZlIHRoYXQgcmVxdWlyZXMgYSB0aGUgdmFsdWUgdG8NCmJlIHRoZSBzYW1l IG9uIEJFIGFuZCBMRSAobm9ybWFsIGluc24gZW5jb2RpbmcpLg0KDQoiLndvcmQiIGlzIGFuIGFz bSBkaXJlY3RpdmUgdGhhdCByZXF1aXJlcyB0aGUgdmFsdWUgdG8NCnVzZSBzd2FwcGVkIGVuY29k aW5nIG9uIEJFIChpZiBpdCdzIHVzZWQgaW4gdGhlIGluc3RydWN0aW9uDQpzdHJlYW0gaXQgd2ls bCBjcmVhdGUgYSBkYXRhIG1hcHBpbmcgc3ltYm9sIGFuZCBkaXNhc20gdG8NCi53b3JkIHZhbHVl IGluc3RlYWQgb2YgdGhlIGluc3RydWN0aW9uIG1uZW1vbmljcykuDQoNCnNvIHdoaWNoIG9uZSBp cyBpdD8NCg0KPj4gaSBkb24ndCB0aGluayB3ZSB1c2UgX19BUk1fKiBpbiBwdWJsaWMgaGVhZGVy cyBjdXJyZW50bHksDQo+PiBidXQgaG9wZWZ1bGx5IGFhcmNoNjRfYmUgY29tcGlsZXJzIGltcGxl bWVudCBpdC4NCj4gDQo+IENhbiBJIHVzZSAjaWYgX19CWVRFX09SREVSX18gPT0gX19PUkRFUl9C SUdfRU5ESUFOX18gIHRoZW4gPw0KDQpobSwgaSdkIGVpdGhlciB1c2UgI2lmZGVmIF9fQUFSQ0g2 NEVCX18gKHNpbmNlIHdlIGFscmVhZHkgdXNlIGl0KQ0Kb3IgdGhlIHBvcnRhYmxlICNpbmNsdWRl IGVuZGlhbi5oIGFuZCBfX0JZVEVfT1JERVIgPT0gX19CSUdfRU5ESUFODQo=