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> a new kernel is relinked at every boot

Known as OpenBSD kernel address randomized link (KARL)[0][1]

Also, libc, and libcrypto are re-linked at boot [2].

And sshd [3].

[0] https://marc.info/?l=openbsd-tech&m=149732026405941

[1] https://news.ycombinator.com/item?id=14709256

[2] https://news.ycombinator.com/item?id=14710180

[3] https://marc.info/?l=openbsd-cvs&m=167407459325339&w=2



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