{"id":818541,"url":"http://patchwork.ozlabs.org/api/patches/818541/?format=json","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=json","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=json","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=json","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":"","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=)","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 ;\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)\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 ) 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 ) 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 ) 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 ","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":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","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"},"content":"Added handler of fs/gs register. It tries to find and check KPCR and version address.\n\nSigned-off-by: Mihail Abakumov \nSigned-off-by: Pavel Dovgalyuk \nSigned-off-by: Dmitriy Koltunov \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"]}