From owner-freebsd-questions@FreeBSD.ORG Sun Sep 23 07:59:03 2007 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 55B4916A41A for ; Sun, 23 Sep 2007 07:59:03 +0000 (UTC) (envelope-from e@recolon.ru) Received: from fk-out-0910.google.com (fk-out-0910.google.com [209.85.128.188]) by mx1.freebsd.org (Postfix) with ESMTP id F030E13C468 for ; Sun, 23 Sep 2007 07:59:02 +0000 (UTC) (envelope-from e@recolon.ru) Received: by fk-out-0910.google.com with SMTP id b27so1644028fka for ; Sun, 23 Sep 2007 00:58:48 -0700 (PDT) Received: by 10.86.4.2 with SMTP id 2mr1400337fgd.1190534325224; Sun, 23 Sep 2007 00:58:45 -0700 (PDT) Received: from localhost ( [81.200.6.25]) by mx.google.com with ESMTPS id g28sm6751256fkg.2007.09.23.00.58.42 (version=SSLv3 cipher=OTHER); Sun, 23 Sep 2007 00:58:43 -0700 (PDT) Date: Sun, 23 Sep 2007 11:59:14 +0400 From: Dmitry Gorbik To: Ghirai Message-Id: <20070923115914.bf06378b.e@recolon.ru> In-Reply-To: <20070923002923.92db3efd.ghirai@ghirai.com> References: <20070923002923.92db3efd.ghirai@ghirai.com> X-Mailer: Sylpheed 2.4.6 (GTK+ 2.10.14; i386-portbld-freebsd6.2) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org Subject: Re: gdb question X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 23 Sep 2007 07:59:03 -0000 On Sun, 23 Sep 2007 00:29:23 +0000 Ghirai wrote: > Hello list, > > I'm playing with a small nasm executable, is there any way > i can get gdb to show me the deadlisting, and allow me to > break at a certain offset, without any debugging symbols? > > Since my code is raw assembly, seeing the sourcecode file > or the deadlisting is the exact same. > > Atm i'm doing like this, and it doesn't seem to work: > > (gdb) file wp > Reading symbols from wp...(no debugging symbols found)...done. > (gdb) break 0x8048099 > No symbol table is loaded. Use the "file" command. > (gdb) run > Starting program: wp > warning: shared library handler failed to enable breakpoint > > Program exited with code 0267. > > > Using gdbtui seems yield the exact same result. > > What i really want is to see the deadlisting and be able to step through > it, seeing what happens with the registers, stack, etc. > > Can gdb do that? > > And are there any other usermode debuggers i could use? > > Thanks for reading. > > -- > Regards, > Ghirai. > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" You can start gdb session like this: $gdb program break main set disassembly-flavor intel disassemble main Now you can use "nexti" to run program till break & "next" will step one instruction (if there were no debugging symbols". That was tested on a program, compiled with nasm. -- Dmitry Gorbik