[Info-vax] Why (conceptually) does executive mode code need unrestricted kernel mode access ?

[VAXman- at SendSpamHere.ORG]

In article <qn7d5t$tcf$1 at dont-email.me>, Simon Clubley <clubley at remove_me.eisner.decus.org-Earth.UFP> writes:
>Why, at a conceptual level, does executive mode code need unrestricted
>kernel mode access ?
>
>If kernel mode access is required, then why can't executive mode code go
>through a normal system service to provide the additional functionality
>like everyone else does ?
>
>For example, what does RMS actually _need_ direct unrestricted kernel mode
>access for and why can't this be provided for by a normal system service ?

It is. $CMKRNL.



>If it's a privileges problem, the system service could check that the
>previous mode was executive mode before deciding whether to allow the
>specific operation in question.

It does.



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VAXman- A Bored Certified VMS Kernel Mode Hacker    VAXman(at)TMESIS(dot)ORG

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