Article View: comp.std.unix
Article #689Re: qfork()
From: John F Haugh II
Date: Wed, 02 Jan 1991 13:17
Date: Wed, 02 Jan 1991 13:17
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Submitted-by: jfh@rpp386.cactus.org (John F Haugh II) In article <16370@cs.utexas.edu> mason@tmsoft.uucp (Dave Mason) writes: >The real requirement is presumably: ``Must not execute any code that >changes MEMORY.'' As both the parent and child have their own register >sets. Now, expressing that in a high-level way that is portable may >be quite a trick. (Think of SPARC vs. 386 vs. HP/3000!) Yes, that is the essence of the problem - there are CPUs out there which have a very small number of CPU registers (perhaps only two or three) available to the user. As I recall, the TI 9900 has one register which points to a location in memory where the rest of the "registers" exist, and of course older HP CPU's have their own ideas about where data is stored. -- John F. Haugh II UUCP: ...!cs.utexas.edu!rpp386!jfh Ma Bell: (512) 832-8832 Domain: jfh@rpp386.cactus.org "While you are here, your wives and girlfriends are dating handsome American movie and TV stars. Stars like Tom Selleck, Bruce Willis, and Bart Simpson." Volume-Number: Volume 22, Number 53
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!jsq From: jfh@rpp386.cactus.org (John F Haugh II) Newsgroups: comp.std.unix Subject: Re: qfork() Message-ID: <16474@cs.utexas.edu> Date: 2 Jan 91 13:17:31 GMT References: <16066@cs.utexas.edu> <16271@cs.utexas.edu> <16307@cs.utexas.edu> <16370@cs.utexas.edu> Sender: jsq@cs.utexas.edu Reply-To: jfh@rpp386.cactus.org (John F Haugh II) Organization: Lone Star Cafe and BBS Service Lines: 21 Approved: jsq@cs.utexas.edu (Moderator, John S. Quarterman) X-Submissions: std-unix@uunet.uu.net