arm_smcc_1_2_*: Don't trash SP and X19 if no return value structure.
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Authored by jhb on Jan 1 2023, 4:03 AM.

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rG6cc52efa13ed: arm_smcc_1_2_*: Don't trash SP and X19 if no return value structure.

Summary

Jumping direct to ret was not restoring the saved value of x19 and was
also not adjusting sp to discard the two saved registers.

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rG FreeBSD src repository

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Event Timeline

jhb created this revision.Jan 1 2023, 4:03 AM

Herald added subscribers: emaste, imp. · View Herald TranscriptJan 1 2023, 4:03 AM

jhb requested review of this revision.Jan 1 2023, 4:03 AM

Harbormaster completed remote builds in B48928: Diff 114691.Jan 1 2023, 4:03 AM

lwhsu added a subscriber: schakrabarti_microsoft.com.Jan 1 2023, 5:37 AM

andrew accepted this revision.Jan 30 2023, 3:13 PM

This revision is now accepted and ready to land.Jan 30 2023, 3:13 PM

Closed by commit rG6cc52efa13ed: arm_smcc_1_2_*: Don't trash SP and X19 if no return value structure. (authored by jhb). · Explain WhyFeb 1 2023, 9:54 PM

This revision was automatically updated to reflect the committed changes.

jhb added a commit: rG6cc52efa13ed: arm_smcc_1_2_*: Don't trash SP and X19 if no return value structure..

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sys/

dev/

psci/

smccc_arm64.S

4 lines

Diff 116232

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sys/dev/psci/smccc_arm64.S

arm_smcc_1_2_*: Don't trash SP and X19 if no return value structure.ClosedPublicActions