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From: ccplumb@watnot.UUCP
Newsgroups: comp.unix.wizards
Subject: Re: copyin
Message-ID: <12602@watnot.UUCP>
Date: Thu, 12-Mar-87 12:07:07 EST
Article-I.D.: watnot.12602
Posted: Thu Mar 12 12:07:07 1987
Date-Received: Fri, 13-Mar-87 04:36:22 EST
References: <4838@brl-adm.ARPA> <713@instable.UUCP>
Reply-To: ccplumb@watnot.UUCP (Colin Plumb)
Distribution: world
Organization: U. of Waterloo, Ontario
Lines: 21

In article <713@instable.UUCP> amos%nsta@nsc.com (Amos Shapir) writes:
>When in kernel mode on a VAX, you have both kernel and user spaces mapped,
>since they do not overlap virtually. Copyin/copyout do not use special
>instructions, but they do sanity checks without which a mistake by a user
>might crash the system.
>
>(A side effect of this is that the u struct is accessible from user mode,
>although read-only).

Does anyone know if this feature is available on a Sun 3?  Where would I look
in memory (from the user process)?

(I can probably find this myself, but)
which include file holds the relavent documentation?

Thanks in advance for all hints received.

	-Colin Plumb (ccplumb@watnot.UUCP)

Zippy says:
With YOU, I can be MYSELF..  We don't NEED Dan Rather..