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version 1.19, 2016/07/22 20:30:32 version 1.20, 2016/07/22 20:31:34
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     <li><a href="http://man.openbsd.org/sigreturn.2">sigreturn(2)</a>      <li><a href="http://man.openbsd.org/sigreturn.2">sigreturn(2)</a>
         can now only be used by the kernel-provided signal trampoline,          can now only be used by the kernel-provided signal trampoline,
         with a cookie to detect attempts to reuse it.          with a cookie to detect attempts to reuse it.
     <li>To deter ROP exploits, in <a href="http://man.openbsd.org/rc.8">rc(8)</a>,      <li>To deter code reuse exploits, in <a href="http://man.openbsd.org/rc.8">rc(8)</a>,
         re-link libc.so on startup, placing the objects in a random order.          re-link libc.so on startup, placing the objects in a random order.
     <li>In the <a href="http://man.openbsd.org/getpwnam.3">getpwnam(3)</a>      <li>In the <a href="http://man.openbsd.org/getpwnam.3">getpwnam(3)</a>
         family of functions, stop opening the shadow database by default.          family of functions, stop opening the shadow database by default.
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