tree 34dcb43dd299474198398f6c561018018a164d85
parent 0ec61597ed1ca79021b31fe47f9ec968c450dd1a
author David Brazdil <dbrazdil@google.com> 1576690660 +0000
committer David Brazdil <dbrazdil@google.com> 1576690660 +0000

Emit speculation barriers after ERETs

According to Linux commit 679db70801da9fda91d26caf13bf5b5ccc74e8e8
some ARM64 CPUs may speculate past an ERET. This could be used as part
of a side-channel attack.

To mitigate the issue, emit DSB/ISB barriers after every ERET.

Add a build step which dumps the generated ELF and check that this holds
for every ERET in the binary to prevent regressing.

Bug: 146490856
Change-Id: Ie5ceeabb10d27b19c6f5ea334a643eede89c82c0