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Evgeniy Stepanov 234fc117f8 [hwasan] Fix kernel instrumentation of stack.
Summary:
Kernel addresses have 0xFF in the most significant byte.
A tag can not be pushed there with OR (tag << 56);
use AND ((tag << 56) | 0x00FF..FF) instead.

Reviewers: kcc, andreyknvl

Subscribers: srhines, llvm-commits, hiraditya

Differential Revision: https://reviews.llvm.org/D42941

llvm-svn: 324691
2018-02-09 00:59:10 +00:00
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