From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [185.58.85.151]) (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 D538B5CA0 for ; Tue, 1 Mar 2022 15:16:26 +0000 (UTC) Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id uk-mta-318-Vr7v5iKRMIKftw0gpJuxvQ-1; Tue, 01 Mar 2022 15:16:24 +0000 X-MC-Unique: Vr7v5iKRMIKftw0gpJuxvQ-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) by AcuMS.aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) with Microsoft SMTP Server (TLS) id 15.0.1497.28; Tue, 1 Mar 2022 15:16:22 +0000 Received: from AcuMS.Aculab.com ([fe80::994c:f5c2:35d6:9b65]) by AcuMS.aculab.com ([fe80::994c:f5c2:35d6:9b65%12]) with mapi id 15.00.1497.028; Tue, 1 Mar 2022 15:16:22 +0000 From: David Laight To: 'Miguel Ojeda' , Nick Desaulniers CC: Dan Li , Catalin Marinas , Will Deacon , Nathan Chancellor , Kees Cook , Masahiro Yamada , Thomas Gleixner , Andrew Morton , Mark Rutland , "Sami Tolvanen" , Nicholas Piggin , Guenter Roeck , Masami Hiramatsu , Miguel Ojeda , Luc Van Oostenryck , Marco Elver , linux-kernel , Linux ARM , "llvm@lists.linux.dev" , "linux-hardening@vger.kernel.org" Subject: RE: [PATCH] [PATCH v2] AARCH64: Add gcc Shadow Call Stack support Thread-Topic: [PATCH] [PATCH v2] AARCH64: Add gcc Shadow Call Stack support Thread-Index: AQHYLU7BTsy+Ydg2gUOh1XD7Md8Cb6yqo40Q Date: Tue, 1 Mar 2022 15:16:22 +0000 Message-ID: <4b7a3af66c54458681f00a55a84752ab@AcuMS.aculab.com> References: <20220225032410.25622-1-ashimida@linux.alibaba.com> <26a0a816-bc3e-2ac0-d773-0819d9f225af@linux.alibaba.com> In-Reply-To: Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 RnJvbTogTWlndWVsIE9qZWRhDQo+IFNlbnQ6IDAxIE1hcmNoIDIwMjIgMDk6MjkNCj4gDQo+IE9u IE1vbiwgRmViIDI4LCAyMDIyIGF0IDExOjM1IFBNIE5pY2sgRGVzYXVsbmllcnMNCj4gPG5kZXNh dWxuaWVyc0Bnb29nbGUuY29tPiB3cm90ZToNCj4gPg0KPiA+IE9yIHNpbXBseSBhZGQgYSAjZGVm aW5lIGZvciBfX25vc2NzIHRvIGluY2x1ZGUvbGludXgvY29tcGlsZXItZ2NjLmgNCj4gPiB3aXRo IGFwcHJvcHJpYXRlIGd1YXJkIGFuZCBsZWF2ZSB0aGUgZXhpc3RpbmcgI2lmbmRlZiBpbg0KPiA+ IGluY2x1ZGUvbGludXgvY29tcGlsZXJfdHlwZXMuaCBhcyBpcy4gIEknZCBwcmVmZXIgdGhhdCB3 aGVuIHRoZQ0KPiA+IGNvbXBpbGVycyBkaWZmZXIgaW4gdGVybXMgb2YgZmVhdHVyZSBkZXRlY3Rp b24gc2luY2UgaXQncyBhcyBleHBsaWNpdA0KPiA+IGFzIHBvc3NpYmxlLg0KPiANCj4gVGhlIGlk ZWEgaXMgdG8gYXZvaWQgZGlmZmVyaW5nIGhlcmUgdG8gYmVnaW4gd2l0aCwgaS5lLiB0byB1c2Ug dGhlDQo+IHNhbWUgY29kZSBmb3IgYm90aCBjb21waWxlcnMgKG9ubHkgd2hlbmV2ZXIgdGhhdCBp cyBwb3NzaWJsZSwgb2YNCj4gY291cnNlKSwgdGh1cyBoYXZpbmcgYSBzaW5nbGUgYCNkZWZpbmVg IGluIGEgc2luZ2xlIGZpbGUuDQo+IA0KPiBEbyB5b3UgdGhpbmsgd2Ugd2lsbCBoYXZlIHRvIGNo YW5nZSBpbiB0aGUgZnV0dXJlIGZvciBzb21lIHJlYXNvbiwNCj4gdGh1cyBuZWVkaW5nIHRvIHNw bGl0IGl0IGFnYWluPw0KDQpXaGF0IGhhcHBlbnMgaWYgYW4gb3V0IG9mIHRyZWUgbW9kdWxlIGlz IGNvbXBpbGVkIHdpdGggdGhlIG90aGVyIGNvbXBpbGVyPw0KU3VyZWx5IHRoaXMgaXMgcGFydCBv ZiB0aGUgQUJJIGFuZCBzaG91bGQgYmUgZGVmaW5lZCBmb3IgdGhlIGFyY2hpdGVjdHVyZT8NCg0K CURhdmlkDQoNCi0NClJlZ2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lkZSwgQnJhbWxleSBSb2FkLCBN b3VudCBGYXJtLCBNaWx0b24gS2V5bmVzLCBNSzEgMVBULCBVSw0KUmVnaXN0cmF0aW9uIE5vOiAx Mzk3Mzg2IChXYWxlcykNCg==