From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.6 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.2 Received: from minnie.tuhs.org (minnie.tuhs.org [45.79.103.53]) by inbox.vuxu.org (OpenSMTPD) with ESMTP id 088d2b0e for ; Tue, 14 Jan 2020 23:23:10 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id EAAC29C03D; Wed, 15 Jan 2020 09:23:08 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 3087C9B898; Wed, 15 Jan 2020 09:22:52 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=fail reason="key not found in DNS" (0-bit key; unprotected) header.d=kev009.com header.i=@kev009.com header.b="aw6dPK+D"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id DA1ED9B898; Wed, 15 Jan 2020 09:22:50 +1000 (AEST) Received: from mail-io1-f66.google.com (mail-io1-f66.google.com [209.85.166.66]) by minnie.tuhs.org (Postfix) with ESMTPS id 6490793D06 for ; Wed, 15 Jan 2020 09:22:50 +1000 (AEST) Received: by mail-io1-f66.google.com with SMTP id d15so15835245iog.3 for ; Tue, 14 Jan 2020 15:22:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kev009.com; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=wTb901k8iQO6fgckHLd0rlyUwbHHm/vPi+zV57EL7FA=; b=aw6dPK+DPM1eDzhGm9qnkgGi/q0ez8KpOOGBr+0dTOr6jWQi0otDgmtvytDIMxSIPT MTbchBCYqTPOlv5J0cy0fqvx4Mss6enVCZhmkwdii+KYZJ2jCdzakf9FcmRMoIefCjpr bQpH0T4fdwDtXye/pcjnqE9Elab0HHWtLym2E= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=wTb901k8iQO6fgckHLd0rlyUwbHHm/vPi+zV57EL7FA=; b=GHUIy+k+Rts55HNrHfq1zNAPBRyAqpXZPy8seIuoJwUYGloXcxZftKJWAsmO+s7wpZ eDL5gNf1UPf4U+mrvx6P4EFF8dMT4QoEUlKgEkWYTYJtWAkpxeEk+o1/cah2qNI8S9MM xAxWA1YR2Z38Uc/j1C4TZehjnGZ8iy1SVdGd6pexm9DTTGuHWueP9VOQV0/x/4H8dq/x hz/EDyEonozIXNdbVvMLwQvsZMIqQ4QCBDmi6ZC/GCIplu5W8X4UvJT7AGAcRmf2x2bp hzJ0DpiYPeyj7rdbol9yWi3O58LNzO6Y7EqBL1D2w6VubQVFSh3NrgMd82hChMAWa6I3 g6EA== X-Gm-Message-State: APjAAAXDXLiIw1IQPvqBj/xjm5+Wmdg7oU5pkWxnVuVPNYTosb6HzE6O wI5sXgO7LhlDEZARHnl8CYWyaNJN5/tNvri0Ph/WCdVDa5o= X-Google-Smtp-Source: APXvYqzjU8KBhv99+i7yU/FnGtRUJhczEeMxGuimg8cTmcuKrKMK1621y90T+Gl6tK03BgqLaU2NGZss5iw6Ss9QdV4= X-Received: by 2002:a02:7310:: with SMTP id y16mr21391487jab.133.1579044169638; Tue, 14 Jan 2020 15:22:49 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Kevin Bowling Date: Tue, 14 Jan 2020 16:22:38 -0700 Message-ID: To: Charles H Sauer Content-Type: text/plain; charset="UTF-8" Subject: Re: [TUHS] two AIX items [was Re: History of symbol preemption X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: TUHS main list Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" I've got a bunch of paper AIX internals documentation outside the usual, most interesting from memory is one describing the 4.1 work where it gained SMP support, pthreads, and a bunch of other things. I need to get some kind of scanning setup if you are interested. On Tue, Jan 14, 2020 at 12:29 PM Charles H Sauer wrote: > > > > On 1/13/2020 1:58 PM, Paul Winalski wrote: > > > ... LInux, AIX and probably other implementations of ELF have a > > feature in the runtime loader called symbol preemption. When loading > > As far as I know, AIX has never used ELF. > > On the RT, AIX 1 & 2 used a.out enhanced for basic shared library > support, designed by Larry Loucks with help from ISC, probably John > Levine, if I recall correctly. > > Starting with AIX 3, AIX used an extended COFF. See Auslander et al, > "Dynamic Linking and Loading in the AIX System", SA23-2619 RISC > System/6000 Technology p. 151. (I don't have/know of PDF of SA23-2619.) > See, also, https://en.wikipedia.org/wiki/XCOFF. > > It seems likely that AIX XCOFF supported symbol preemption, I haven't > tried to determine one way or the other. > > AIX on 386 & 370 probably used a.out. Clem probably knows. > > An IBM retirees group on Facebook led me to IBM AIX Enhancements and > Modernization at http://www.redbooks.ibm.com/abstracts/sg248453.html, > just available yesterday. I tend to think of AIX as abandoned by IBM in > favor of Linux, but, of course, that isn't really true. I've downloaded > the PDF, but not looked inside. > > Charlie > > -- > voice: +1.512.784.7526 e-mail: sauer@technologists.com > fax: +1.512.346.5240 Web: https://technologists.com/sauer/ > Facebook/Google/Skype/Twitter: CharlesHSauer