Messages in this thread |  | | Subject | Re: what is wrong with this? | From | (Eric W. Biederman) | Date | 08 Jan 1997 15:11:06 -0600 |
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>>>>> "Andrew" == Andrew E Mileski <aem@nic.ott.hookup.net> writes:
[snip]
>> Exactly. Except iopl(3), in addition to raising the bitmap to take 8k, >> sets it to allow access to any ioport, thus ioperm is not necessary >> when iopl is called. Or so that is the current behavior. I know not >> if it is correct behavior.
Andrew> Makes sense to me.
iopl(3) does not increase the bitmap size. As it's name suggests it sets the Input Output Privelege Level to 3 which disables i/o port privelege checking.
Eric
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