arm64: Stop setting x0 for pcb_onfault handlers
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Authored by andrew on Sep 27 2024, 3:49 PM.

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Reviewers

kib
markj
manu

Group Reviewers

arm64

Commits

rG8803e789393c: arm64: Stop setting x0 for pcb_onfault handlers

Summary

All handlers set x0 before returning, there is no need to also do so
in the data abort exception handler.

Diff Detail

Repository

rG FreeBSD src repository

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Lint Skipped

Unit

Tests Skipped

Build Status

Buildable 59625
Build 56512: arc lint + arc unit

Event Timeline

andrew created this revision.Sep 27 2024, 3:49 PM

Herald added a reviewer: manu. · View Herald TranscriptSep 27 2024, 3:49 PM

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

Harbormaster completed remote builds in B59625: Diff 143809.Sep 27 2024, 3:49 PM

andrew requested review of this revision.Sep 27 2024, 3:49 PM

andrew added a parent revision: D46813: arm64: Support pmap_fault with a locked pmap.

andrew added a child revision: D46815: arm64: Check TDP_NOFAULTING in a data abort.

markj accepted this revision.Sep 30 2024, 8:58 AM

markj added inline comments.

sys/arm64/arm64/trap.c
378	This is the Mach error too, so not correct.

This revision is now accepted and ready to land.Sep 30 2024, 8:58 AM

Closed by commit rG8803e789393c: arm64: Stop setting x0 for pcb_onfault handlers (authored by andrew). · Explain WhyOct 15 2024, 5:25 PM

This revision was automatically updated to reflect the committed changes.

andrew added a commit: rG8803e789393c: arm64: Stop setting x0 for pcb_onfault handlers.

Revision Contents
Changeset List

Path

Size

sys/

arm64/

trap.c

1 line

Diff 143809

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arm64: Stop setting x0 for pcb_onfault handlersClosedPublicActions