From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 11654 invoked by alias); 31 Mar 2010 17:43:57 -0000 Received: (qmail 11639 invoked by uid 22791); 31 Mar 2010 17:43:56 -0000 X-SWARE-Spam-Status: No, hits=-1.9 required=5.0 tests=BAYES_00,T_RP_MATCHES_RCVD X-Spam-Check-By: sourceware.org Received: from mail.codesourcery.com (HELO mail.codesourcery.com) (38.113.113.100) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Wed, 31 Mar 2010 17:43:51 +0000 Received: (qmail 18500 invoked from network); 31 Mar 2010 17:43:49 -0000 Received: from unknown (HELO orlando.localnet) (pedro@127.0.0.2) by mail.codesourcery.com with ESMTPA; 31 Mar 2010 17:43:49 -0000 From: Pedro Alves To: Michael Snyder Subject: Re: Random gdbserver question (x86) Date: Wed, 31 Mar 2010 17:43:00 -0000 User-Agent: KMail/1.12.2 (Linux/2.6.31-20-generic; KDE/4.3.2; x86_64; ; ) Cc: "gdb@sourceware.org" References: <4BB28BF2.8080100@vmware.com> <201003310219.49529.pedro@codesourcery.com> <4BB387E1.3070702@vmware.com> In-Reply-To: <4BB387E1.3070702@vmware.com> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201003311843.47068.pedro@codesourcery.com> 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: 2010-03/txt/msg00224.txt.bz2 On Wednesday 31 March 2010 18:35:29, Michael Snyder wrote: > And is that more-or-less true of gdb as well? I.e., if host/target > is x86_64-linux, then gdb can debug both 32 and 64 bit apps, but if > host/target is i386-linux, then gdb can only debug 32 bit apps? Native gdb yes. A 32-bit GDB should still be able to debug a remote/gdbserver 64-bit inferior. > > Actually, I phrase it as a question even though I am pretty sure it > is true. My real question is "Why?". It seems to me that if we just > included amd64-linux-nat.o and amd64-*-tdep.o in the build, then > 32-bit gdb should be able to debug 64-bit native apps. Wouldn't work. The limitation is on ptrace. -- Pedro Alves