arm64: Raise a SIGILL if we fail reading an insn
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Authored by andrew on May 6 2025, 5:03 PM.

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manu
harry.moulton_arm.com

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arm64

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rG8bfb456eafd3: arm64: Raise a SIGILL if we fail reading an insn

Summary

When reading an instruction we may fail if another thread is unmapping
a page while the current thread is executing from it. In this case
raise a SIGILL rather than panicing the kernel.

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rG FreeBSD src repository

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Event Timeline

andrew created this revision.May 6 2025, 5:03 PM

Herald added a reviewer: manu. · View Herald TranscriptMay 6 2025, 5:03 PM

Herald added subscribers: emaste, imp. · View Herald Transcript

andrew requested review of this revision.May 6 2025, 5:03 PM

Harbormaster completed remote builds in B63952: Diff 154964.May 6 2025, 5:03 PM

andrew added a child revision: D50204: arm64: Remove an old workaround.May 6 2025, 5:03 PM

harry.moulton_arm.com accepted this revision.May 9 2025, 3:24 PM

This revision is now accepted and ready to land.May 9 2025, 3:24 PM

Closed by commit rG8bfb456eafd3: arm64: Raise a SIGILL if we fail reading an insn (authored by andrew). · Explain WhyMay 12 2025, 12:50 PM

This revision was automatically updated to reflect the committed changes.

andrew added a commit: rG8bfb456eafd3: arm64: Raise a SIGILL if we fail reading an insn.

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sys/

arm64/

undefined.c

3 lines

Diff 155316

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sys/arm64/arm64/undefined.c

arm64: Raise a SIGILL if we fail reading an insnClosedPublicActions