Messages in this thread | | | Subject | Re: [OT] Wrapping memory. | Date | Sat, 1 Dec 2001 22:24:58 +0000 (GMT) | From | Alan Cox <> |
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> I would like to have a 64 KBarray (of char), that's trivial, however what > I would like is for the last 4 KB [yes thankfully this is exactly one > page... (assume i386)] to reference the same physical memory as the first > four.
Yep you can do that.
> Is this at all possible? If so, how would I do this in user space (and > could it be done without root priv?)?
mmap will do what you need. Create a 60K object on disk and mmap it at the base address and then 60K further on for 4K.
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