From fnaumann@mail.cs.uni-magdeburg.de Fri Mar 19 12:36:53 2004 Message-ID: <405ADBE2.7030707@imperia.net> Date: Fri, 19 Mar 2004 12:39:14 +0100 From: Guido Flohr User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3) Gecko/20030312 X-Accept-Language: de, ru, ar, en-us, en, fr MIME-Version: 1.0 To: Standa Opichal Cc: mint@fishpool.com Subject: Re: [MiNT] Shared libs without MMU resources References: <405868D5.4060101@imperia.net> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-2; format=flowed X-Virus-Scanned: by amavisd-new using F-Secure Antivirus at imperia.net Delivered-To: mint@fishpool.com Delivered-To: mint@lists.fishpool.fi X-ecartis-version: Ecartis v1.0.0 Sender: mint-bounce@lists.fishpool.fi Errors-to: mint-bounce@lists.fishpool.fi X-original-sender: guido@imperia.net Precedence: bulk List-help: List-unsubscribe: List-ID: X-List-ID: Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by prinz.cs.uni-magdeburg.de id i2JBapU01435 Hi, I hope you won't mind that I reply to the list. Standa Opichal wrote: > Hi Guido! > > Thanks for the clarifications. Could you, please review the following? > > 4) .so libs without real sharing (any working gcc target, anyhow > modified) gcc has nothing to do with that. It is the linker, ld, that would produce the shared libraries (.so). > Would need to provide the relocation tables to be appended to the > generated .o/.so/binary files. OS would not feature any sharing, but just > load the whole thing into memory each time is is requested to be linked > together and relocate to a particular physical address (no VM). I think this is a very good idea. > Would this be really enormous piece of work? It shouldn't be that much work. Your idea is to provide dynamic linking, but still keep a private copy of the entire code (text and data) in each processes memory, correct? Of course, you will not save any memory if you copy the code, but you will still have a lot of advantages. Not only, that you save a lot of recompilation and repackaging after changing a shared library; a lot of software that links modules/plug-ins dynamically (Apache, Perl, ...) would become a lot more usable. Ciao Guido -- Imperia AG, Development Leyboldstr. 10 - D-50354 Hürth - http://www.imperia.net/