Mapping kernel global variable to User space

Asked Mar 19 '14 at 13:17

Active Mar 19 '14 at 13:17

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I am trying to deliever a virtual address of global variable created in Kernel space into user space (linux).

The best way I found so far is to use remap_pfn_range() function, providing it with the physical address of my global variable, and return to the user space the mapped address.

I wander if there is a better way to do it?

Thank you in advance

asked Mar 19 '14 at 13:17

dear_tzvi

Do you want to write to that memory from userspace or just get the location of the pointer? – problemPotato Mar 19 '14 at 13:22
I want to write to that memory area from user space – dear_tzvi Mar 19 '14 at 13:56
Well you'll probably want to check out this answer: http://stackoverflow.com/a/9663366/3388817 – problemPotato Mar 19 '14 at 14:17
Thank You it seems that there isn't a better way – dear_tzvi Mar 19 '14 at 14:20
1

this would assumably work, but not everything that works is necessarily a good idea. – mfro Mar 19 '14 at 14:58

Mapping kernel global variable to User space

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