Messages in this thread | | | From | Nikolaus Rath <> | Subject | virt_to_page for userspace pointers (was: Reversing a memory mapping?) | Date | Sat, 05 Feb 2011 16:04:08 -0500 |
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Nikolaus Rath <Nikolaus@rath.org> writes: > Is there a way that my own kernel module can "reverse" this mmap call? > I.e. given the userspace pointer, how do I get access to the physical > location of the memory that has been mapped?
Ok, after some studying I think I can ask the question in a better way:
Is there an equivalent function to virt_to_page (and virt_to_phys) that works with userspace pointers? Or do I have to manually walk through the page tables? In the later case, are there any examples of this kind of search that I could use as a basis?
Thanks,
-Nikolaus
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