From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2321BC43142 for ; Thu, 21 Jun 2018 21:18:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D7CDA223CC for ; Thu, 21 Jun 2018 21:18:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D7CDA223CC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754277AbeFUVSE (ORCPT ); Thu, 21 Jun 2018 17:18:04 -0400 Received: from mga14.intel.com ([192.55.52.115]:27241 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752650AbeFUVSC (ORCPT ); Thu, 21 Jun 2018 17:18:02 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 Jun 2018 14:18:02 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,253,1526367600"; d="scan'208";a="48912102" Received: from hanvin-mobl2.amr.corp.intel.com ([10.254.42.214]) by fmsmga007.fm.intel.com with ESMTP; 21 Jun 2018 14:18:01 -0700 From: "H. Peter Anvin, Intel" To: Linux Kernel Mailing List Cc: "H. Peter Anvin" , Ingo Molnar , Thomas Gleixner , Andy Lutomirski , "Chang S . Bae" , "Markus T . Metzger" , "H . Peter Anvin" Subject: [PATCH v3 0/7] x86/ptrace: regset access to the GDT and LDT Date: Thu, 21 Jun 2018 14:17:47 -0700 Message-Id: <20180621211754.12757-1-h.peter.anvin@intel.com> X-Mailer: git-send-email 2.14.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "H. Peter Anvin" Give a debugger access to the visible part of the GDT and LDT. This allows a debugger to find out what a particular segment descriptor corresponds to; e.g. if %cs is 16, 32, or 64 bits. v3: Requalify LDT segments for selectors that have actually changed. v2: Add missing change to elf.h for the very last patch. Cc: Ingo Molnar Cc: Thomas Gleixner Cc: Andy Lutomirski Cc: Chang S. Bae Cc: Markus T. Metzger Cc: H. Peter Anvin arch/x86/Kconfig | 4 + arch/x86/include/asm/desc.h | 24 +++- arch/x86/include/asm/ldt.h | 16 +++ arch/x86/include/asm/segment.h | 10 ++ arch/x86/kernel/Makefile | 3 +- arch/x86/kernel/ldt.c | 283 ++++++++++++++++++++++++++++++++--------- arch/x86/kernel/ptrace.c | 103 ++++++++++++++- arch/x86/kernel/tls.c | 102 +++++---------- arch/x86/kernel/tls.h | 8 +- include/uapi/linux/elf.h | 2 + 10 files changed, 413 insertions(+), 142 deletions(-)