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- Path: Belgium.EU.net!news
- From: aeslw@pophost.eunet.be
- Newsgroups: comp.sys.m68k
- Subject: User/Supervisor Mode
- Date: Tue, 12 Mar 96 17:10:20 PDT
- Organization: EUnet Belgium, Leuven, Belgium
- Message-ID: <NEWTNews.17103.826679995.TOMVK@aestvk.eunet.be>
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-
- G'Day
-
- I was wondering if anyone out there has had much experience using the M68k
- (we use the M68332) in User/Supervisor Mode.
-
- Specifically, I am interested in how to perform system calls from User
- programs to Supervisor routines via a trap (eg how to pass the parameters
- etc). We are using a multi-tasking executive and this creates other
- problems in how to safely handle a context switch, hardware interrupts etc.
- Our executive (c-task, ported) needs to perform the above tasks in the
- most efficient manner possible. Another requirement is that our User tasks
- be written in C.
-
- Our solutions to date have been......untidy..... :)
-
- Cheers
- Lance Williams (aeslw@pophost.eunet.be)
-
-