From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 22817 invoked by alias); 21 Nov 2003 14:25:58 -0000 Mailing-List: contact gdb-help@sources.redhat.com; run by ezmlm Precedence: bulk List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sources.redhat.com Received: (qmail 22808 invoked from network); 21 Nov 2003 14:25:58 -0000 Received: from unknown (HELO mx1.redhat.com) (66.187.233.31) by sources.redhat.com with SMTP; 21 Nov 2003 14:25:58 -0000 Received: from int-mx1.corp.redhat.com (int-mx1.corp.redhat.com [172.16.52.254]) by mx1.redhat.com (8.11.6/8.11.6) with ESMTP id hALEPvH02790 for ; Fri, 21 Nov 2003 09:25:57 -0500 Received: from pobox.corp.redhat.com (pobox.corp.redhat.com [172.16.52.156]) by int-mx1.corp.redhat.com (8.11.6/8.11.6) with ESMTP id hALEPvw19579; Fri, 21 Nov 2003 09:25:57 -0500 Received: from deneb.localdomain (msalter.cipe.redhat.com [10.0.0.36]) by pobox.corp.redhat.com (8.12.8/8.12.8) with ESMTP id hALEPuHT015374; Fri, 21 Nov 2003 09:25:57 -0500 Received: by deneb.localdomain (Postfix, from userid 500) id 39AB27879F; Fri, 21 Nov 2003 09:25:56 -0500 (EST) From: Mark Salter To: manojv@noida.hcltech.com Cc: gdb@sources.redhat.com In-reply-to: <1B3885BC15C7024C845AAC78314766C501033444@EXCH-01> (manojv@noida.hcltech.com) Subject: Re: remote debugging packets References: <1B3885BC15C7024C845AAC78314766C501033444@EXCH-01> Message-Id: <20031121142556.39AB27879F@deneb.localdomain> Date: Fri, 21 Nov 2003 14:25:00 -0000 X-SW-Source: 2003-11/txt/msg00192.txt.bz2 >>>>> Manoj Verma, Noida writes: > My question is, > 1) I did the "step" only once but why there are three packets (sometimes two > packets) corresponding to the "step" ($s#73...Ack) as shown below in > sanpshot-1, evenif the correct response is received for the first packet. "step" is used to step past a line of source code. The $s packet tells the target to step past a machine instruction. Apparently in this case, the source code line corresponds to three machine instructions. > 2) On the Gdb client side when I continue, "(gdb) continue", why it first > sends a packet ($s#73...Ack) and then the packet ($c#63...Ack) as shown > below in sanpshot-2 ? It should only send the packet ($c#63...Ack). This is expected. GDB has to single-step past the one machine instruction before re-inserting any breakpoints and continuing. --Mark