Article View: comp.arch
Article #13379Re: String Handling and run-time libraries
From: blarson
Date: Thu, 02 Apr 1987 07:28
Date: Thu, 02 Apr 1987 07:28
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1806 bytes
In article <287@pembina.alberta.UUCP> bjorn@alberta.UUCP (Bjorn R. Bjornsson) writes: >Assuming a >vectored entry point interface to the library, you can move your >images from one type of Vax to another and your program will >run with the most efficient `str*' routines available for that >machine, ie. the routines in that machines resident library. This isn't the only, or nessisarily best, way to implement shared libraries. Primos implements shared libraries via faulted links. (call by name first time a routine is called, which replaces the faulting pointer with one the actual routine.) I think this is yet another idea they borrowed from Multics. (The hardware overhead is a fault bit on pointers, but you could implement it on a vax by reserving half of your address space. (Hmmm... does a user process ever need to reference the kernal area of memory?)) Of course, VMS uses entry vectors, and we all know VMS does everything right. :-) -- Bob Larson Arpa: Blarson@Usc-Eclb.Arpa Uucp: (several backbone sites)!sdcrdcf!usc-oberon!castor.usc.edu!blarson seismo!cit-vax!usc-oberon!castor.usc.edu!blarson
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!utgpu!water!watnot!watmath!clyde!rutgers!ames!cit-vax!usc-oberon!castor.usc.edu!blarson From: blarson@castor.usc.edu.UUCP Newsgroups: comp.arch,comp.lang.c Subject: Re: String Handling and run-time libraries Message-ID: <1417@castor.usc.edu> Date: Thu, 2-Apr-87 02:28:17 EST Article-I.D.: castor.1417 Posted: Thu Apr 2 02:28:17 1987 Date-Received: Sat, 4-Apr-87 12:40:30 EST References: <15292@amdcad.UUCP> <978@ames.UUCP> <15694@sun.uucp> <6042@mimsy.UUCP> <287@pembina.alberta.UUCP> Reply-To: blarson@castor.usc.edu.UUCP (Bob Larson) Organization: USC AIS, Los Angeles Lines: 21