Elliott Hughes 613f814508 Revert "Revert "make vdso function pointers read-only at runtime""
This reverts commit 1946856b1f18a27c51ba30bb9e304f25b722ee05.

This goes back to the original scheme of PROT_NONEing a page within
libc. Allocating a new page didn't fail safe for cases where these
functions are called from the dynamic linker.

Bug: http://b/22568628
Change-Id: I3e7241c8b54c27ea4a898bc952375c1e9ae38c80
2015-07-20 15:59:33 -07:00
..
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