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From: Viktor Prutyanov To: qemu-devel@nongnu.org Date: Thu, 12 Jul 2018 20:29:27 +0300 Message-Id: <1531416567-13558-1-git-send-email-viktor.prutyanov@virtuozzo.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-Originating-IP: [185.231.240.5] X-ClientProxiedBy: AM4PR07CA0004.eurprd07.prod.outlook.com (2603:10a6:205:1::17) To HE1PR08MB2858.eurprd08.prod.outlook.com (2603:10a6:7:33::13) X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 5b4014ca-2f99-47a7-7077-08d5e81d0da3 X-Microsoft-Antispam: UriScan:; BCL:0; PCL:0; RULEID:(7020095)(4652040)(8989117)(5600053)(711020)(4534165)(4627221)(201703031133081)(201702281549075)(8990107)(2017052603328)(7153060)(7193020); SRVR:HE1PR08MB2858; X-Microsoft-Exchange-Diagnostics: 1; HE1PR08MB2858; 3:6aLfoRa4MAyRzrA9+Yv3Nw7AfMYMYd+nql62pIiYOS7xYC/IX77CSrzmgI0qrFQXlqLhTMbo+nstbDrOYKNSLGQ8HgXkE84s0ck+LN+wRwE4af198xDQoKQzZVf73O8cHAUpbiWVVu6UDYS+xcAo8YKh992yPR90W+fiMbOAsKFAFAaIkXbN+1bCaaFKvIrf6c0swHvXSApvLV1QW4bM5YdqUaexcVj/d2KqjruXfx9/mVr5LOElSVWJBwMGyc/U; 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20:fD4H6rV3+XRlvoNeWVOh3lzATpz/gAQlVIri/Nmh83ogODIokOF6yl7Uc6h/uqRH9/2vieaCvYNwqDC8d9sxfH6xB7h6hTiJRZCroVGVsoSY7AwPPv1qaBYlGdMmPhByQI4ByicLfaIHS/FOzrWnTHCuA2Mgm9RXWCibBSp7Ojk= X-OriginatorOrg: virtuozzo.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Jul 2018 17:29:41.7053 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5b4014ca-2f99-47a7-7077-08d5e81d0da3 X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 0bc7f26d-0264-416e-a6fc-8352af79c58f X-MS-Exchange-Transport-CrossTenantHeadersStamped: HE1PR08MB2858 X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-Received-From: 2a01:111:f400:fe08::726 Subject: [Qemu-devel] [PATCH v2] dump: add kernel_gs_base to QEMU CPU state X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pbonzini@redhat.com, rkagan@virtuozzo.com, Viktor Prutyanov , ehabkost@redhat.com, rth@twiddle.net Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" This patch adds field with content of KERNEL_GS_BASE MSR to QEMU note in ELF dump. On Windows, if all vCPUs are running usermode tasks at the time the dump is created, this can be helpful in the discovery of guest system structures during conversion ELF dump to MEMORY.DMP dump. Signed-off-by: Viktor Prutyanov Reviewed-by: Eduardo Habkost --- v2: keep version 1 in QEMUCPUState and document the extension procedure target/i386/arch_dump.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/target/i386/arch_dump.c b/target/i386/arch_dump.c index 35b55fc..cc8750f 100644 --- a/target/i386/arch_dump.c +++ b/target/i386/arch_dump.c @@ -258,6 +258,12 @@ struct QEMUCPUState { QEMUCPUSegment cs, ds, es, fs, gs, ss; QEMUCPUSegment ldt, tr, gdt, idt; uint64_t cr[5]; + /* + * Fields below are optional and are being added at the end without + * changing the version. External tools may identify their presence + * by checking 'size' field. + */ + uint64_t kernel_gs_base; }; =20 typedef struct QEMUCPUState QEMUCPUState; @@ -315,6 +321,8 @@ static void qemu_get_cpustate(QEMUCPUState *s, CPUX86St= ate *env) s->cr[2] =3D env->cr[2]; s->cr[3] =3D env->cr[3]; s->cr[4] =3D env->cr[4]; + + s->kernel_gs_base =3D env->kernelgsbase; } =20 static inline int cpu_write_qemu_note(WriteCoreDumpFunction f, --=20 2.7.4