Messages in this thread |  | | Date | Tue, 10 Jul 2001 12:03:44 -0500 | From | Timur Tabi <> |
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Chris Wedgwood wrote:
>How does FreeBSD do this? What about other OSs? Do they map out most >of userland on syscall entry and map it in as required for their >equivalents to copy_to/from_user? (Taking the performance hit in doing >so?) >
I don't know about *BSD, but in Windows NT/2000, even drivers run in virtual space. The OS is not monolithic, so address spaces are general not "shared" as they are in Linux.
-- Timur Tabi Interactive Silicon
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