https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253335

Mark Johnston <[email protected]> changed:

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--- Comment #10 from Mark Johnston <[email protected]> ---
The problem appears to be with this commit:
https://github.com/qemu-bsd-user/qemu-bsd-user/commit/63d5d4f649f44f8e3d9105dec40a354d92a19550

That check is indeed needed.  qemu relies on delivery of SIGSEGV to detect
self-modifying code so that it can update its translation cache accordingly. 
This will manifest as a page fault, so ksi_trapno is T_PAGEFLT == 0xc on amd64.

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