Date: Thu, 30 May 2002 12:14:01 -0700 (PDT) From: Tom Tang <tangj@cs.ucdavis.edu> To: <freebsd-hackers@freebsd.org> Subject: KLD mmap question Message-ID: <Pine.LNX.4.33.0205301209280.6101-100000@pc1.cs.ucdavis.edu>
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Hello,
I have a question about implementing mmap functions in
device drivers. Thinking it would be simple, I contigmalloc'd
a buffer of PAGE_SIZE and returned it using atop like other
mmap device implementations. However when my userland program
mmaps the device with offset 0, when I try accessing the returned
pointer, it returns me invalid memory address. Any help would
be appreciated...
- Tom
--
Tom Tang
tangj AT cs DOT ucdavis DOT edu
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