* Prevent self modifying code.
@ 2006-10-09 16:18 James Courtier-Dutton
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From: James Courtier-Dutton @ 2006-10-09 16:18 UTC (permalink / raw)
To: linux-mm
Hi,
1) In linux, is it possible to enforce that all pages with executable
program code are automatically marked read-only? I.e. to actively
prevent any self modifying code.
2) I know there is a NX(no execute) bit. Is that automatically applied
to all read-write pages? i.e to stack and data pages.
3) Is it possible to ensure that the kernel is the only place that can
take files with the +x bit set, and load the program code into memory
then mark it as read-only, executable pages.
4) Is it possible to ensure that all jump tables used by the executable
code are also read-only?
James
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