From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 19957 invoked by alias); 10 May 2010 02:14:39 -0000 Received: (qmail 19949 invoked by uid 22791); 10 May 2010 02:14:38 -0000 X-SWARE-Spam-Status: No, hits=-1.4 required=5.0 tests=AWL,BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,SARE_MSGID_LONG45 X-Spam-Check-By: sourceware.org Received: from mail-pv0-f169.google.com (HELO mail-pv0-f169.google.com) (74.125.83.169) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Mon, 10 May 2010 02:14:34 +0000 Received: by pvg16 with SMTP id 16so699018pvg.0 for ; Sun, 09 May 2010 19:14:32 -0700 (PDT) Received: by 10.142.150.37 with SMTP id x37mr2046194wfd.97.1273457672409; Sun, 09 May 2010 19:14:32 -0700 (PDT) MIME-Version: 1.0 Received: by 10.143.4.9 with HTTP; Sun, 9 May 2010 19:14:12 -0700 (PDT) In-Reply-To: References: <4BA7B64D.7090403@vmware.com> <201004300933.o3U9XXat025217@glazunov.sibelius.xs4all.nl> From: Hui Zhu Date: Mon, 10 May 2010 02:14:00 -0000 Message-ID: Subject: Re: [Fwd: Re: [RFA 3/5] Prec: x86 segment register support: target] To: Mark Kettenis , dje@google.com, msnyder@vmware.com, gdb-patches@sourceware.org, dan@codesourcery.com, eliz@gnu.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-IsSubscribed: yes Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org X-SW-Source: 2010-05/txt/msg00222.txt.bz2 On Wed, May 5, 2010 at 10:46, Hui Zhu wrote: > On Fri, Apr 30, 2010 at 19:07, Hui Zhu wrote: >> On Fri, Apr 30, 2010 at 17:33, Mark Kettenis w= rote: >>>> From: Hui Zhu >>>> Date: Fri, 30 Apr 2010 14:29:09 +0800 >>>> >>>> On Thu, Mar 25, 2010 at 10:14, Hui Zhu wrote: >>>> > On Thu, Mar 25, 2010 at 02:44, Doug Evans wrote: >>>> >> >>>> >> On Mon, Mar 22, 2010 at 7:59 PM, Hui Zhu wrote: >>>> >> > On Tue, Mar 23, 2010 at 02:47, Doug Evans wrote: >>>> >> >> On Mon, Mar 22, 2010 at 11:26 AM, Michael Snyder wrote: >>>> >> >>> I'd just like to point out that while all this sounds great, >>>> >> >>> it shouldn't be a prerequisite to the original task of just >>>> >> >>> getting prec to record the segments and offsets correctly. >>>> >> >>> >>>> >> >>> Maybe we should split these two tasks, so that Teawater can >>>> >> >>> go ahead and accomplish his. >>>> >> >> >>>> >> >> To the extent that they can be split, IWBN alright. >>>> >> >> >>>> >> >> I wonder if the interface is sufficient though (setting aside wh= ere to >>>> >> >> put it and how it will look). >>>> >> >> Any particular o/s might not provide sufficient hooks of course. >>>> >> >> linux's modify_ldt, AIUI, let's one change more than just foo_ba= se. >>>> >> >> NativeClient http://code.google.com/p/nativeclient/ uses it, for= example. >>>> >> >> >>>> >> > >>>> >> > Thanks Doug. >>>> >> > >>>> >> > I suggest we support segment base step by step. >>>> >> > When the OS that support it will show the xxx_base to user, the >>>> >> > unsupport OS will show nothing. >>>> >> > >>>> >> > What do you think about it? >>>> >> >>>> >> Is supporting segment base sufficient? >>>> >> Or do you also need to support, e.g., segment limit and flags too? >>>> >> There may be more, but they're the two that come to mind. >>>> >> [That's what I was referring to regarding whether the interface was= sufficient.] >>>> > >>>> > Prec just need the base to get the insn memory operate address. =A0Do >>>> > you think we need other message of segment? >>>> > >>>> > If need, do we need divide all message like eflags? >>>> > >>>> > Thanks, >>>> > Hui >>>> > >>>> >>>> Hi all, >>>> >>>> X86 looks stab now. =A0Shall we wake up this patch? >>> >>> Thanks for the reminder. >>> >>> Let me first ask a question. =A0What do people expect out of this? =A0Do >>> they really want support for fully segmented code, or is it just for >>> small deviations like accessing per-thread storage through %fs/%gs? >>> >> >> Prec must know the each base of segment register. >> >> If you don't like it. =A0What about the old way that I use? =A0It doesn't >> add anything to reg list. >> But for the each way, we need add interface to the target part that >> prec can get the value. >> >> Thanks, >> Hui >> > > Ping. > > Thanks, > Hui > Ping. Thanks, Hui