Messages in this thread | ![/](/images/icornerl.gif) | | Date | Thu, 17 Apr 2003 14:21:31 -0400 (EDT) | From | Steven Rostedt <> | Subject | What's the reason that /dev/mem can't map unreserved RAM? |
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Hi all,
What's the rational behind /dev/mem not being able to map unreserved RAM? It can't be for protecting the system, because if you have access to reserved RAM (kernel text) then you can modify the remap_pte_range to allow for mapping of ram.
I have a user program for debugging kernel modules and the like, and it uses /dev/mem to map ram and prints it out. But unless I take out the check in remap_pte_range, I can't see allocated pages.
I just want to know the rational behind this.
Thanks,
-- Steve
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