tree dde5e86b6ae51f92087a9034750c282e11884164
parent 1fe109ecf3b1acd10d55091f3e0eed7efeca98f1
author Nick Kralevich <nnk@google.com> 1330454400 -0800
committer Nick Kralevich <nnk@google.com> 1330994682 -0800

Add relro support

Add support for PT_GNU_RELRO. This allows the static linker to
indicate that certain regions of memory should be marked as
"read-only" after dynamic linking is complete.

See:
  * http://www.akkadia.org/drepper/nonselsec.pdf (section 6)
  * http://tk-blog.blogspot.com/2009/02/relro-not-so-well-known-memory.html

Note that this change has no effect on Android right now, because
we don't compile our code with relro enabled.

Change-Id: I6541f8775367e8558b4388f7d105b1ae6e8f046b