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Simplify non-pti syscall entry on amd64.
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Authored by kib on Jul 19 2020, 9:54 AM.

Details

Summary

Limit manipulations to use %rax as scratch to the pti portion of the syscall entry code.

Submitted by: alc

Diff Detail

Repository
rS FreeBSD src repository
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Automatic diff as part of commit; lint not applicable.
Unit
Automatic diff as part of commit; unit tests not applicable.