I think I can do that by getting the related pte of a virtuak kaddr, starting with pgd_offset_k <http://lxr.free-electrons.com/ident?i=pgd_offset_k>(address <http://lxr.free-electrons.com/ident?i=address>) , or directly with pte_t <http://lxr.free-electrons.com/ident?i=pte_t> *lookup_address <http://lxr.free-electrons.com/ident?i=lookup_address>(unsigned long address <http://lxr.free-electrons.com/ident?i=address>, unsigned int *level <http://lxr.free-electrons.com/ident?i=level>); And then I can checks the flags of this pte. 2016-09-05 12:59 GMT+02:00 Oscar Salvador <osalvador.vilardaga@gmail.com>:
Hi all,
I'm writing a module to read/write kernel memory, and for this I'd like to check if a page is marked as read-only, so we don't have the right to write there (kernel code for instance).
I though about the flags field from "struct page {}", but from the name I can't see any useful flag to check this.
The only flag I saw is different between kernel code and module code is that kernel code has the flag "reserved" enabled, so it's not swapped.
Could someone provide me a hint about that?
Thank you very much