From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 13928 invoked by alias); 20 Aug 2012 08:34:54 -0000 Received: (qmail 13858 invoked by uid 22791); 20 Aug 2012 08:34:53 -0000 X-SWARE-Spam-Status: No, hits=-6.4 required=5.0 tests=AWL,BAYES_00,KHOP_RCVD_UNTRUST,RCVD_IN_DNSWL_HI,RCVD_IN_HOSTKARMA_W,RP_MATCHES_RCVD,SPF_HELO_PASS X-Spam-Check-By: sourceware.org Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Mon, 20 Aug 2012 08:34:33 +0000 Received: from int-mx12.intmail.prod.int.phx2.redhat.com (int-mx12.intmail.prod.int.phx2.redhat.com [10.5.11.25]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q7K8YWlt003589 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Mon, 20 Aug 2012 04:34:32 -0400 Received: from host2.jankratochvil.net (ovpn-116-37.ams2.redhat.com [10.36.116.37]) by int-mx12.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q7K8YRX6017932 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Mon, 20 Aug 2012 04:34:31 -0400 Date: Mon, 20 Aug 2012 08:34:00 -0000 From: Jan Kratochvil To: John Smith Cc: gdb@sourceware.org Subject: Re: examine memory coomand Message-ID: <20120820083421.GA20446@host2.jankratochvil.net> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-IsSubscribed: yes Mailing-List: contact gdb-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sourceware.org X-SW-Source: 2012-08/txt/msg00069.txt.bz2 On Mon, 20 Aug 2012 10:27:12 +0200, John Smith wrote: > when gdb try to get memory data from "examine " command , is it > get data from pythical memory with a "mov" operation or from > memory map file? Assuming GNU/Linux OS here. It is read by PTRACE_PEEKDATA or from /proc/PID/mem. It is virtual address space of the process (not physical memory), as provided by kernel. Jan