tree 9352c1ef42d3972e8e202eeabd0e7bfb73799b95
parent 0bf5cf87c6b7d3de8962ba132ecfb6f0e4b84f06
author Nick Kralevich <nnk@google.com> 1344658122 -0700
committer Nick Kralevich <nnk@google.com> 1344873011 -0700

linker: don't perform unnecessary mprotects

The linker only needs to mark the text segment as
writable iff the file has text relocations. Unnecessarily
calling mprotect when it isn't necessary is slow, and some
security enhanced kernels don't like it. Pages which are
simultaneously writable and executable are considered a no-no.

The vast majority of executables / shared libraries on Android
do NOT have text relocations.

Change-Id: Ic38ce30a99b7e33ecf21efd9c108547a58eafa35