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version 1.53, 2018/10/14 16:12:03 version 1.54, 2018/10/14 16:15:54
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         process to the specified files and directories.  It is most          process to the specified files and directories.  It is most
         powerful when properly combined with privilege separation          powerful when properly combined with privilege separation
         and <a href="https://man.openbsd.org/pledge.2">pledge(2)</a>.          and <a href="https://man.openbsd.org/pledge.2">pledge(2)</a>.
     <li>New "retguard" security mechanism on amd64 and arm64:      <li>New RETGUARD security mechanism on amd64 and arm64:
         use per-function random cookies to protect access to function          use per-function random cookies to protect access to function
         return instructions, making them harder to use in ROP gadgets.          return instructions, making them harder to use in ROP gadgets.
     <li>Simultaneous multithreading (SMT) is now disabled by default      <li>Simultaneous multithreading (SMT) is now disabled by default
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