From nobody Tue Feb 10 20:48:29 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1506424307838587.2786340618177; Tue, 26 Sep 2017 04:11:47 -0700 (PDT) Received: from localhost ([::1]:46720 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dwnmB-0000cO-VJ for importer@patchew.org; Tue, 26 Sep 2017 07:11:44 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59039) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dwnfg-0003Tk-5y for qemu-devel@nongnu.org; Tue, 26 Sep 2017 07:05:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dwnff-0000Ly-96 for qemu-devel@nongnu.org; Tue, 26 Sep 2017 07:05:00 -0400 Received: from mail.ispras.ru ([83.149.199.45]:51786) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dwnff-0000Lp-2L for qemu-devel@nongnu.org; Tue, 26 Sep 2017 07:04:59 -0400 Received: from Misha-PC.lan02.inno (unknown [85.142.117.226]) by mail.ispras.ru (Postfix) with ESMTPSA id 515F054009A; Tue, 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: quoted-printable 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: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: sw@weilnetz.de, lprosek@redhat.com, dovgaluk@ispras.ru, rkagan@virtuozzo.com, pbonzini@redhat.com, den@openvz.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Added handler of fs/gs register. It tries to find and check KPCR and versio= n address. Signed-off-by: Mihail Abakumov Signed-off-by: Pavel Dovgalyuk Signed-off-by: Dmitriy Koltunov --- include/exec/windbgstub-utils.h | 5 +++ windbgstub-utils.c | 63 +++++++++++++++++++++++++++++++++++= +++- 2 files changed, 66 insertions(+), 2 deletions(-) diff --git a/include/exec/windbgstub-utils.h b/include/exec/windbgstub-util= s.h index 90fb766839..f2402ebb34 100755 --- a/include/exec/windbgstub-utils.h +++ b/include/exec/windbgstub-utils.h @@ -62,6 +62,11 @@ _t; \ }) =20 +typedef struct InitedAddr { + target_ulong addr; + bool is_init; +} InitedAddr; + bool windbg_on_load(void); void windbg_on_exit(void); =20 diff --git a/windbgstub-utils.c b/windbgstub-utils.c index b5fb6db3f2..662096647e 100755 --- a/windbgstub-utils.c +++ b/windbgstub-utils.c @@ -11,10 +11,69 @@ =20 #include "exec/windbgstub-utils.h" =20 +#ifdef TARGET_X86_64 +# define OFFSET_SELF_PCR 0x18 +# define OFFSET_VERS 0x108 +#else +# define OFFSET_SELF_PCR 0x1C +# define OFFSET_VERS 0x34 +#endif + +typedef struct KDData { + InitedAddr KPCR; + InitedAddr version; +} KDData; + +static KDData *kd; + bool windbg_on_load(void) { - return false; + CPUState *cpu =3D qemu_get_cpu(0); + CPUArchState *env =3D cpu->env_ptr; + + if (!kd) { + kd =3D g_new0(KDData, 1); + } + + if (!kd->KPCR.is_init) { + + #ifdef TARGET_X86_64 + kd->KPCR.addr =3D env->segs[R_GS].base; + #else + kd->KPCR.addr =3D env->segs[R_FS].base; + #endif + + static target_ulong prev_KPCR; + if (!kd->KPCR.addr || prev_KPCR =3D=3D kd->KPCR.addr) { + return false; + } + prev_KPCR =3D kd->KPCR.addr; + + if (kd->KPCR.addr !=3D READ_VMEM(cpu, kd->KPCR.addr + OFFSET_SELF_= PCR, + target_ulong)) { + return false; + } + + kd->KPCR.is_init =3D true; + } + + if (!kd->version.is_init && kd->KPCR.is_init) { + kd->version.addr =3D READ_VMEM(cpu, kd->KPCR.addr + OFFSET_VERS, + target_ulong); + if (!kd->version.addr) { + return false; + } + kd->version.is_init =3D true; + } + + WINDBG_DEBUG("windbg_on_load: KPCR " FMT_ADDR, kd->KPCR.addr); + WINDBG_DEBUG("windbg_on_load: version " FMT_ADDR, kd->version.addr); + + return true; } =20 void windbg_on_exit(void) -{} +{ + g_free(kd); + kd =3D NULL; +}