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Differential D32609

nehemiah: manually assemble xstore(-rng)
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Authored by woodsb02 on Oct 23 2021, 12:53 AM.
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jmg

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Summary

It seems that clang IAS erronously adds repz prefix which should not be
there. Cpu would try to store around %ecx bytes of random, while we
only expect a word.

PR: 259218
Reported and tested by: Dennis Clarke <dclarke@blastwave.org>
Sponsored by: The FreeBSD Foundation
MFC after: 1 week

Diff Detail

Repository
rS FreeBSD src repository - subversion
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Lint Passed
Unit
No Test Coverage
Build Status
Buildable 42308
Build 39196: arc lint + arc unit

Event Timeline

woodsb02 created this revision.Oct 23 2021, 12:53 AM
Herald added subscribers: jmg, imp. · View Herald TranscriptOct 23 2021, 12:53 AM
woodsb02 requested review of this revision.Oct 23 2021, 12:53 AM
Harbormaster completed remote builds in B42308: Diff 97314.Oct 23 2021, 12:53 AM
woodsb02 abandoned this revision.Oct 23 2021, 12:55 AM

phabricator blunder - never meant to create a review for this existing commit!?

Revision Contents
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PathSize
sys/
dev/
random/
2 lines

Diff 97314

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sys/dev/random/nehemiah.c

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