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Differential D36503

arm64: Read tpidrro_el0 for the 32-bit TLS pointer.
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Authored by jhb on Sep 9 2022, 9:25 AM.
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emaste

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jrtc27
andrew
imp
manu
Summary

This shouldn't be a functional change since cpu_set_user_tls sets both
registers, but this is technically more correct.

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Repository
rG FreeBSD src repository
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Build Status
Buildable 47301
Build 44188: arc lint + arc unit

Event Timeline

jhb created this revision.Sep 9 2022, 9:25 AM
Herald added a reviewer: manu. · View Herald TranscriptSep 9 2022, 9:25 AM
Herald added a subscriber: emaste. · View Herald Transcript
jhb requested review of this revision.Sep 9 2022, 9:25 AM
jhb added a parent revision: D36502: arm64: Simplify initialization of pc_freemask..
jhb added a child revision: D36504: arm,arm64: Save TLS register in mcontext_t..
Harbormaster completed remote builds in B47301: Diff 110377.Sep 9 2022, 9:26 AM
jhb mentioned this in D36504: arm,arm64: Save TLS register in mcontext_t..Sep 29 2022, 10:02 PM
jhb abandoned this revision.Sep 21 2024, 4:21 PM

Actually, I think the current code is more correct as the 32-bit kernel always uses TPIDRURW as the source of truth for TLS including for its get_arm_tls function.

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sys/
arm64/
arm64/
2 lines

Diff 110377

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sys/arm64/arm64/ptrace_machdep.c

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