From nobody Tue Feb 10 03:38:59 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 1543502845378198.19004460860208; Thu, 29 Nov 2018 06:47:25 -0800 (PST) Received: from localhost ([::1]:54552 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gSNb9-0004ab-TL for importer@patchew.org; Thu, 29 Nov 2018 09:47:23 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52625) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gSNIn-0004N8-0d for qemu-devel@nongnu.org; Thu, 29 Nov 2018 09:28:25 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gSNIm-0005Bd-Ad for qemu-devel@nongnu.org; Thu, 29 Nov 2018 09:28:24 -0500 Received: from mail.ispras.ru ([83.149.199.45]:39328) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gSNIm-00059K-2C for qemu-devel@nongnu.org; Thu, 29 Nov 2018 09:28:24 -0500 Received: from Misha-PC.lan02.inno (unknown [85.142.117.226]) by mail.ispras.ru (Postfix) with ESMTPSA id 55A005400C1; Thu, 29 Nov 2018 17:28:23 +0300 (MSK) From: Mikhail Abakumov To: qemu-devel@nongnu.org Date: Thu, 29 Nov 2018 17:28:21 +0300 Message-ID: <154350170076.8036.9044616893263975778.stgit@Misha-PC.lan02.inno> In-Reply-To: <154350164526.8036.12623669071583857903.stgit@Misha-PC.lan02.inno> References: <154350164526.8036.12623669071583857903.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 09/39] windbg: implement find_KPCR 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" Signed-off-by: Mikhail Abakumov Signed-off-by: Pavel Dovgalyuk --- target/i386/windbgstub.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/target/i386/windbgstub.c b/target/i386/windbgstub.c index 1c1631d7c1..15a90e521c 100644 --- a/target/i386/windbgstub.c +++ b/target/i386/windbgstub.c @@ -12,6 +12,18 @@ #include "qemu/osdep.h" #include "exec/windbgstub-utils.h" =20 +#ifdef TARGET_X86_64 +#define OFFSET_KPCR_SELF 0x18 +#else /* TARGET_I386 */ +#define OFFSET_KPCR_SELF 0x1C +#endif /* TARGET_I386 */ + +#ifdef TARGET_X86_64 +#define TARGET_SAFE(i386_obj, x86_64_obj) x86_64_obj +#else /* TARGET_I386 */ +#define TARGET_SAFE(i386_obj, x86_64_obj) i386_obj +#endif /* TARGET_I386 */ + static InitedAddr KPCR; #ifdef TARGET_X86_64 static InitedAddr kdDebuggerDataBlock; @@ -21,6 +33,26 @@ static InitedAddr kdVersion; =20 static bool find_KPCR(CPUState *cs) { + X86CPU *cpu =3D X86_CPU(cs); + CPUX86State *env =3D &cpu->env; + + if (!KPCR.is_init) { + KPCR.addr =3D env->segs[TARGET_SAFE(R_FS, R_GS)].base; + + static target_ulong prev_KPCR; + if (!KPCR.addr || prev_KPCR =3D=3D KPCR.addr) { + return false; + } + prev_KPCR =3D KPCR.addr; + + if (KPCR.addr !=3D VMEM_ADDR(cs, KPCR.addr + OFFSET_KPCR_SELF)) { + return false; + } + KPCR.is_init =3D true; + + DPRINTF("find KPCR " FMT_ADDR "\n", KPCR.addr); + } + return KPCR.is_init; } =20