#OSKernel
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sixtyvividtails.bsky.social
Windows can seamlessly patch your code when it catches #GP. So called "alignment fixup".

KiOpPatchCode modifies user code: movaps->movups, movdqa->movdqu.

Needs x64 code, and opt-in: SetErrorMode(SEM_NOALIGNMENTFAULTEXCEPT), or ProcessEnableAlignmentFaultFixup, or ThreadEnableAlignmentFaultFixup.
Decompilation of nt!KiOpPatchCode, with callstack. In text form: https://pastebin.com/X9BaUxhh Yes, you can detect unsolicited int3 presence using this facility, but that's about it. May be also do a party trick with racer thread which modifies seemingly non-writeable "RX" page (during short period when oskernel secretly makes it RWX). There doesn't seem to be any issues with instruction decoder and "emulator" which would enable things not allowed already to native code. Except may be that sus KiOp_Mov, but it's only for ring0 anyway. To look further, see nt!KiOp* funcs and data.
June 23, 2025 at 11:05 PM
localizethedocs.org
🎉 asterinas-book-l10n is published!

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GitHub - localizethedocs/asterinas-book-l10n: Localization of The Asterinas Book
Localization of The Asterinas Book. Contribute to localizethedocs/asterinas-book-l10n development by creating an account on GitHub.
github.com
February 3, 2026 at 5:06 AM
localizethedocs.org
🎉 redoxos-book-l10n is published!

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GitHub - localizethedocs/redoxos-book-l10n: Localization of The Redox OS Book
Localization of The Redox OS Book. Contribute to localizethedocs/redoxos-book-l10n development by creating an account on GitHub.
github.com
February 9, 2026 at 6:35 AM