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CVS log for src/sys/arch/i386/i386/locore.S

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Default branch: MAIN
Current tag: nick-nhusb-base-20160907


Revision 1.135 / (download) - annotate - [select for diffs], Sat Jul 9 06:58:06 2016 UTC (15 months, 1 week ago) by maxv
Branch: MAIN
CVS Tags: pgoyette-localcount-base, nick-nhusb-base-20160907
Branch point for: pgoyette-localcount
Changes since 1.134: +4 -4 lines
Diff to previous 1.134 (colored)

The CPU considers a given va as executable if none of its levels have
the NOX bit. With the top level recursive slot, however, several levels
are recursively omitted, which implies that each entry that is not the
child of NOX-ed parents actually appears somewhere in the virtual space
as executable via this slot, even if it is followed by an underlying
entry that has the NOX bit.

This recursive slot is only used to edit the page tree itself. Make it
non-executable.

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