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Thread: Do we need support for the LFENCE instruction?


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Markus Humm

Posts: 5,113
Registered: 11/9/03
Do we need support for the LFENCE instruction?  
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  Posted: Feb 16, 2018 9:06 AM
Hello,

for fighting against the SPECTRE-1 CPU attack the LFENCE instruction could help a little bit:

http://www.felixcloutier.com/x86/LFENCE.xm

Can it be easily accessed from Delphi applications and would the compiler insert it at places
where it is sensible to do so? Microsoft seems to do so.

See also this German article:
https://www.heise.de/security/meldung/Meltdown-Spectre-Microsofts-Compiler-Fix-weitgehend-wirkungslos-3970815.html

Greetings

Markus
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