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GET /api/patches/818541/?format=api
{ "id": 818541, "url": "http://patchwork.ozlabs.org/api/patches/818541/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/150642389679.3900.2803313967054050497.stgit@Misha-PC.lan02.inno/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<150642389679.3900.2803313967054050497.stgit@Misha-PC.lan02.inno>", "list_archive_url": null, "date": "2017-09-26T11:04:57", "name": "[09/43] windbg: handler of fs/gs register", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "ab2edb021395ac1aa8535f4eb2da8871b5485bc1", "submitter": { "id": 71645, "url": "http://patchwork.ozlabs.org/api/people/71645/?format=api", "name": "Mikhail Abakumov", "email": "mikhail.abakumov@ispras.ru" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/150642389679.3900.2803313967054050497.stgit@Misha-PC.lan02.inno/mbox/", "series": [ { "id": 5104, "url": "http://patchwork.ozlabs.org/api/series/5104/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=5104", "date": "2017-09-26T11:04:06", "name": "Windbg supporting", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/5104/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/818541/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/818541/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@bilbo.ozlabs.org", "Authentication-Results": "ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=nongnu.org\n\t(client-ip=2001:4830:134:3::11; helo=lists.gnu.org;\n\tenvelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n\treceiver=<UNKNOWN>)", "Received": [ "from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11])\n\t(using TLSv1 with cipher AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3y1dXv39pdz9tXP\n\tfor <incoming@patchwork.ozlabs.org>;\n\tTue, 26 Sep 2017 21:10:37 +1000 (AEST)", "from localhost ([::1]:46710 helo=lists.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.71) (envelope-from\n\t<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>)\n\tid 1dwnl4-0007iQ-OE\n\tfor incoming@patchwork.ozlabs.org; Tue, 26 Sep 2017 07:10:34 -0400", "from eggs.gnu.org ([2001:4830:134:3::10]:59039)\n\tby lists.gnu.org with esmtp (Exim 4.71)\n\t(envelope-from <mikhail.abakumov@ispras.ru>) id 1dwnfg-0003Tk-5y\n\tfor qemu-devel@nongnu.org; Tue, 26 Sep 2017 07:05:01 -0400", "from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)\n\t(envelope-from <mikhail.abakumov@ispras.ru>) id 1dwnff-0000Ly-96\n\tfor qemu-devel@nongnu.org; Tue, 26 Sep 2017 07:05:00 -0400", "from mail.ispras.ru ([83.149.199.45]:51786)\n\tby eggs.gnu.org with esmtp (Exim 4.71)\n\t(envelope-from <mikhail.abakumov@ispras.ru>) id 1dwnff-0000Lp-2L\n\tfor qemu-devel@nongnu.org; Tue, 26 Sep 2017 07:04:59 -0400", "from Misha-PC.lan02.inno (unknown [85.142.117.226])\n\tby mail.ispras.ru (Postfix) with ESMTPSA id 515F054009A;\n\tTue, 26 Sep 2017 14:04:58 +0300 (MSK)" ], "From": "Mihail Abakumov <mikhail.abakumov@ispras.ru>", "To": "qemu-devel@nongnu.org", "Date": "Tue, 26 Sep 2017 14:04:57 +0300", "Message-ID": "<150642389679.3900.2803313967054050497.stgit@Misha-PC.lan02.inno>", "In-Reply-To": "<150642384156.3900.3326424823772221077.stgit@Misha-PC.lan02.inno>", "References": "<150642384156.3900.3326424823772221077.stgit@Misha-PC.lan02.inno>", "User-Agent": "StGit/0.17.1-dirty", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "7bit", "X-detected-operating-system": "by eggs.gnu.org: GNU/Linux 3.x [fuzzy]", "X-Received-From": "83.149.199.45", "Subject": "[Qemu-devel] [PATCH 09/43] windbg: handler of fs/gs register", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.21", "Precedence": "list", "List-Id": "<qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n\t<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<http://lists.nongnu.org/archive/html/qemu-devel/>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n\t<mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Cc": "sw@weilnetz.de, lprosek@redhat.com, dovgaluk@ispras.ru,\n\trkagan@virtuozzo.com, pbonzini@redhat.com, den@openvz.org", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "\"Qemu-devel\"\n\t<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>" }, "content": "Added handler of fs/gs register. It tries to find and check KPCR and version address.\n\nSigned-off-by: Mihail Abakumov <mikhail.abakumov@ispras.ru>\nSigned-off-by: Pavel Dovgalyuk <dovgaluk@ispras.ru>\nSigned-off-by: Dmitriy Koltunov <koltunov@ispras.ru>\n---\n include/exec/windbgstub-utils.h | 5 +++\n windbgstub-utils.c | 63 ++++++++++++++++++++++++++++++++++++++-\n 2 files changed, 66 insertions(+), 2 deletions(-)", "diff": "diff --git a/include/exec/windbgstub-utils.h b/include/exec/windbgstub-utils.h\nindex 90fb766839..f2402ebb34 100755\n--- a/include/exec/windbgstub-utils.h\n+++ b/include/exec/windbgstub-utils.h\n@@ -62,6 +62,11 @@\n _t; \\\n })\n \n+typedef struct InitedAddr {\n+ target_ulong addr;\n+ bool is_init;\n+} InitedAddr;\n+\n bool windbg_on_load(void);\n void windbg_on_exit(void);\n \ndiff --git a/windbgstub-utils.c b/windbgstub-utils.c\nindex b5fb6db3f2..662096647e 100755\n--- a/windbgstub-utils.c\n+++ b/windbgstub-utils.c\n@@ -11,10 +11,69 @@\n \n #include \"exec/windbgstub-utils.h\"\n \n+#ifdef TARGET_X86_64\n+# define OFFSET_SELF_PCR 0x18\n+# define OFFSET_VERS 0x108\n+#else\n+# define OFFSET_SELF_PCR 0x1C\n+# define OFFSET_VERS 0x34\n+#endif\n+\n+typedef struct KDData {\n+ InitedAddr KPCR;\n+ InitedAddr version;\n+} KDData;\n+\n+static KDData *kd;\n+\n bool windbg_on_load(void)\n {\n- return false;\n+ CPUState *cpu = qemu_get_cpu(0);\n+ CPUArchState *env = cpu->env_ptr;\n+\n+ if (!kd) {\n+ kd = g_new0(KDData, 1);\n+ }\n+\n+ if (!kd->KPCR.is_init) {\n+\n+ #ifdef TARGET_X86_64\n+ kd->KPCR.addr = env->segs[R_GS].base;\n+ #else\n+ kd->KPCR.addr = env->segs[R_FS].base;\n+ #endif\n+\n+ static target_ulong prev_KPCR;\n+ if (!kd->KPCR.addr || prev_KPCR == kd->KPCR.addr) {\n+ return false;\n+ }\n+ prev_KPCR = kd->KPCR.addr;\n+\n+ if (kd->KPCR.addr != READ_VMEM(cpu, kd->KPCR.addr + OFFSET_SELF_PCR,\n+ target_ulong)) {\n+ return false;\n+ }\n+\n+ kd->KPCR.is_init = true;\n+ }\n+\n+ if (!kd->version.is_init && kd->KPCR.is_init) {\n+ kd->version.addr = READ_VMEM(cpu, kd->KPCR.addr + OFFSET_VERS,\n+ target_ulong);\n+ if (!kd->version.addr) {\n+ return false;\n+ }\n+ kd->version.is_init = true;\n+ }\n+\n+ WINDBG_DEBUG(\"windbg_on_load: KPCR \" FMT_ADDR, kd->KPCR.addr);\n+ WINDBG_DEBUG(\"windbg_on_load: version \" FMT_ADDR, kd->version.addr);\n+\n+ return true;\n }\n \n void windbg_on_exit(void)\n-{}\n+{\n+ g_free(kd);\n+ kd = NULL;\n+}\n", "prefixes": [ "09/43" ] }