From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 27704 invoked by alias); 31 Mar 2010 01:19:58 -0000 Received: (qmail 27692 invoked by uid 22791); 31 Mar 2010 01:19:57 -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 01:19:53 +0000 Received: (qmail 11128 invoked from network); 31 Mar 2010 01:19:51 -0000 Received: from unknown (HELO orlando.localnet) (pedro@127.0.0.2) by mail.codesourcery.com with ESMTPA; 31 Mar 2010 01:19:51 -0000 From: Pedro Alves To: gdb@sourceware.org Subject: Re: Random gdbserver question (x86) Date: Wed, 31 Mar 2010 01:19:00 -0000 User-Agent: KMail/1.12.2 (Linux/2.6.31-20-generic; KDE/4.3.2; x86_64; ; ) Cc: Michael Snyder References: <4BB28BF2.8080100@vmware.com> In-Reply-To: <4BB28BF2.8080100@vmware.com> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201003310219.49529.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/msg00218.txt.bz2 On Wednesday 31 March 2010 00:40:34, Michael Snyder wrote: > Question -- is gdbserver "multi-arch" to the extent that a 32-bit > gdbserver (built with target = i386) can debug a 64-bit app? No, only the other way around. It's "multi-arch" to the extent that a linux 64-bit gdbserver (built with target = x86-64) can debug a 32-bit app. It used to only be, only 64x64 or 32x32 was possible; with multi-arch, 64x32 was made possible. > I ask because linux-x86-low.c is full of ifdefs on the architecture. > It looks like most of the 64-bit code won't be compiled if the > build machine is 32-bit. Correct. -- Pedro Alves