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Wed, 9 Jun 2021 14:59:42 +0000 From: Luis Fernando Fujita Pires To: Richard Henderson , "qemu-devel@nongnu.org" Subject: RE: [PATCH v3 27/28] tcg: When allocating for !splitwx, begin with PROT_NONE Thread-Topic: [PATCH v3 27/28] tcg: When allocating for !splitwx, begin with PROT_NONE Thread-Index: AQHXP6wLSEiLGJvpn0q4fAjSPN24NKsL/nRQ Date: Wed, 9 Jun 2021 14:59:41 +0000 Message-ID: References: <20210502231844.1977630-1-richard.henderson@linaro.org> <20210502231844.1977630-28-richard.henderson@linaro.org> In-Reply-To: <20210502231844.1977630-28-richard.henderson@linaro.org> Accept-Language: pt-BR, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: linaro.org; dkim=none (message not signed) header.d=none; linaro.org; dmarc=none action=none header.from=eldorado.org.br; x-originating-ip: [177.102.146.220] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: ee34da6b-4c32-4548-df06-08d92b57363c x-ms-traffictypediagnostic: CP0PR80MB4979: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:6790; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: eldorado.org.br X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: CP2PR80MB3668.lamprd80.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: ee34da6b-4c32-4548-df06-08d92b57363c X-MS-Exchange-CrossTenant-originalarrivaltime: 09 Jun 2021 14:59:42.0194 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b9397c69-e827-4afc-a365-ab275e41638f X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: QVtLbxqQXn6zYmIHqcIK7A/OTDvhDh9GDOvSVt+KbkGgH2dHyt/VmNwWLFGJZaoYj967CSDVqbYoVRpHKRb5jg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CP0PR80MB4979 Received-SPF: pass client-ip=40.107.79.131; envelope-from=luis.pires@eldorado.org.br; helo=NAM03-CO1-obe.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Richard Henderson > There's a change in mprotect() behaviour [1] in the latest macOS on M1 an= d it's > not yet clear if it's going to be fixed by Apple. >=20 > In this case, instead of changing permissions of N guard pages, we change > permissions of N rwx regions. The same number of syscalls are required e= ither > way. >=20 > [1] https://gist.github.com/hikalium/75ae822466ee4da13cbbe486498a191f >=20 > Signed-off-by: Richard Henderson > --- > tcg/region.c | 19 +++++++++---------- > 1 file changed, 9 insertions(+), 10 deletions(-) Reviewed-by: Luis Pires -- Luis Pires Instituto de Pesquisas ELDORADO Aviso Legal - Disclaimer