From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 621 invoked by alias); 27 May 2014 18:25:54 -0000 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 Received: (qmail 601 invoked by uid 89); 27 May 2014 18:25:52 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-2.2 required=5.0 tests=AWL,BAYES_00,RP_MATCHES_RCVD,SPF_HELO_PASS,SPF_PASS autolearn=ham version=3.3.2 X-HELO: mx1.redhat.com Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Tue, 27 May 2014 18:25:52 +0000 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s4RIPlgu024687 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 27 May 2014 14:25:47 -0400 Received: from [127.0.0.1] (ovpn01.gateway.prod.ext.ams2.redhat.com [10.39.146.11]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id s4RIPjPP010737; Tue, 27 May 2014 14:25:46 -0400 Message-ID: <5384D8A9.1060404@redhat.com> Date: Tue, 27 May 2014 18:25:00 -0000 From: Pedro Alves User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 MIME-Version: 1.0 To: Doug Evans , Hui Zhu CC: Hui Zhu , gdb-patches ml Subject: Re: [PATCH] Fix ptype.exp fail in MIPS References: <53719B17.5000208@mentor.com> <5374FF0D.6060608@redhat.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-SW-Source: 2014-05/txt/msg00677.txt.bz2 On 05/19/2014 03:51 PM, Doug Evans wrote: > On Fri, May 16, 2014 at 12:40 AM, Hui Zhu wrote: >> On Fri, May 16, 2014 at 1:53 AM, Pedro Alves wrote: >>> On 05/13/2014 05:09 AM, Hui Zhu wrote: >>>> ptype $pc >>>> type = int32_t >>>> (gdb) FAIL: gdb.base/ptype.exp: ptype $pc >>>> This is because the $pc register in MIPS is set to int but not code_ptr. >>>> And according to the discussion in >>>> https://sourceware.org/ml/gdb/2013-06/msg00020.html, the type cannot be >>>> changed. >>> >>> Hmm, that's not what I get from this branch of the discussion: >>> >>> https://sourceware.org/ml/gdb/2013-06/msg00021.html >>> >>> -- >> >> https://sourceware.org/ml/gdb/2013-06/msg00032.html >> Do you think add ptr64 or $_xx is OK for you to handle this issue? > > IIUC it's not just adding $_xx but changing the type of $pc so that > ptype.exp will pass as is. > Is that correct? Yeah. As listed at the bottom of that url, $pc would be changed to be the ABI function pointer width (32-bit pointer), as a pseudo-register, and $_pc/$rNN would be mapped to the machine's full 64-bit contents, as an integer. I'm not certain this is a good idea of not in terms of user interface. I know _I_ wouldn't be confused, and I know I have been confused by $sp/$esp/$rsp on x86 before ($sp is not really what one would expect if one doesn't know about GDB's special magic stack pointer register), but I'm not really representative of a regular gdb user. -- Pedro Alves