From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,195cfda04e416f67 X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2003-07-05 16:24:16 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!wn14feed!worldnet.att.net!204.127.198.203!attbi_feed3!attbi_feed4!attbi.com!sccrnsc01.POSTED!not-for-mail From: Freejack Subject: Re: GNAT and Memory Maps? Newsgroups: comp.lang.ada Message-ID: References: User-Agent: Pan/0.11.4 (Unix) Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Comment-To: "Ludovic Brenta" NNTP-Posting-Host: 12.245.85.50 X-Complaints-To: abuse@attbi.com X-Trace: sccrnsc01 1057447455 12.245.85.50 (Sat, 05 Jul 2003 23:24:15 GMT) NNTP-Posting-Date: Sat, 05 Jul 2003 23:24:15 GMT Organization: AT&T Broadband Date: Sat, 05 Jul 2003 23:24:15 GMT Xref: archiver1.google.com comp.lang.ada:40083 Date: 2003-07-05T23:24:15+00:00 List-Id: On Sat, 05 Jul 2003 09:10:36 -0400, Ludovic Brenta wrote: > My first idea is to use your own storage pool; see ARM 13.11 for > information on storage pools. However, I'm not sure this approach works > with pagma No_Run_Time. > > By the way, I came across a post by Robert Dewar where he said > No_Run_Time is obsolete. Here is the URL: > > http://gcc.gnu.org/ml/gcc/2002-11/msg00321.html > > What is your situation? Are you writing a Linux kernel module in Ada? > (that's the only reason I can think of to use No_Run_Time) In this case, > I'm not sure you can use glibc either. My initial development platform is a customized Debian Linux x86 installation. I'm using it for developing a prototype application.(Which will eventually be released as OSS, but I'm keeping it under wraps for the moment.) Basically, were a team of three people. We have an experimental logic board with four Ignite Processors (Patriot Scientific Corps.) wired in parallel. The Ignite Processors werent designed to be used in this way(at least that's how our hardware junky explained it to me.) But we found that it was very workable. The other two are CS/CE students. I'll be going back into a CE program once the bills are paid up. This is a summertime project. At least for now. The initial software is designed to run in an essentially embedded environment, with very little Operating System support. Perhaps an exokernel at the most. However, the intent is to keep the software-logic portable, so that it can be run on a regular server (i.e. QNX or a Unix most likely) platform. The only modifications necessary would be between the high level functions and the platform specific interfaces. We considered using Forth for this(and indeed Forth will play an important role.) However maintaining Forth, for this kind of app, across multiple platforms would not be trivial to say the least. I have experience with Ada in high level applications(database programming, some trivial web hacks) but I'm doing some research and getting up to speed with very low level work. Essentially this is going to be a network proxy, which couples high level network metadata (Web, FTP, SSH, and ect..) with low level "network" metadata(all the way down to the Frame Layer) which is able to route data(not just encapsulated "packets") according to the most efficient route for it's type. There are routers which do some of these things already. Hence the idea is not to replace the routers, but rather to work in conjunction with routers to perform much more efficient and reliable network filtering, analysis, and secure communications. One of the goals is to enable the proxie(s) to open secure tunnels to each other, creating a virtual X400 network. Which, if implemented wisely, can guarantee the message will traverse the Internet in 90 minutes or less. Now, I suppose I could port the GNAT runtime. But I'm not at that stage yet. All in all, working with Ada is cake. A little tedious to write at times, but a hell of a lot simpler to use. And I havent had any trouble with it fudging up at a critical moment. And, as you can see, this is large project. Hence, one of my reasons for using Ada. "Where the hell did you guys get this idea?" Well, our hardware junky traced a circuit board and wondered what kinds of things she could use it for. So we came up with this idea at the suggestion of our network guru. Where do I fit in? I read TAOCP, which "inspired" me to read a lot of math books(Heh.) Enough rambling. That's the lowdown. I've remained purposely vague, because we know what we want right now, but we havent decided where this project is going. Like I said, it's a summertime hack. I suppose kinda like modding the Xbox. Might end up in our collection of computer junk, but for now it's a lot of fun. I decided to indulge my anal retentiveness and try to build a system that wont crash(or at least will be very difficult to crack or crash.) Either way, were learning a boatload of stuff. Thanks. Freejack