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    violate it if the executable is marked with <tt>PT_OPENBSD_WXNEEDED</tt>
    and it is located on a filesystem mounted with the <tt>wxallowed</tt>
    <a href="http://man.openbsd.org/mount.8">mount(8)</a> option.
+ <li>GOT and PLT protection by ld.so: first done as part of the W^X
+   work in OpenBSD 3.3, by Dale Rahn and Theo de Raadt.
+   The GOT and PLT regions are read-only outside of ld.so itself.
+   Extended to the .init/.fini sections (constructors and destructors)
+   in OpenBSD 3.4.
  <li>ASLR: OpenBSD 3.4 was the first widely used operating system to
    provide it by default.
  <li><a href="http://man.openbsd.org/OpenBSD-current/man1/gcc-local.1">gcc-local(1)</a>
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    <tt>libc.so</tt> on startup, placing the objects in a random order.
    Theo de Raadt and Robert Peichaer, May 2016,
    enabled by default since OpenBSD 6.0.
+ <li>Kernel-assisted lazy binding for W^X safety in multi-threaded programs.
+   A new syscall <a href="http://man.openbsd.org/kbind.2">kbind(2)</a>
+   permits lazy-binding to be W^X safe in multi-threaded programs.
+   Implemented for OpenBSD 5.9 by Philip Guenther in July 2015.
+ <li>Process layouts in memory tightened to remove execute permission from
+   all separate, non-instruction data and to remove write permission from
+   data that is only modified during loading and relocation.
+   By combining the RELRO (Read-Only after Relocation) design by the
+   GNU project with the original ASLR work from OpenBSD 3.3 and
+   strict lazy-binding work from OpenBSD 5.9, this is applied to not
+   just a subset of programs and libraries but rather to all programs
+   and libraries.
+   Implemented for OpenBSD 6.1 by Philip Guenther in August 2016.
  </ul>
  
  <h3>Functions</h3>