sel4-sys: fix x86_64 target

There is small caveat, as the scratch register had to be
changed (rbx -> r14) as llvm is using it _for something_.
In practice, it should not change anything, though.

sel4test test suites with MCS disabled are passing.
There is bug in mainline with doesn't allow to compile
seL4 kernel with -DLibSel4FunctionAttributes=public so
MCS enabled kernel cannot be tested.

Change-Id: I66271277ceb6d6242ddec1225590f8911f09e946
GitOrigin-RevId: ca33ffff9ed9e52ed101270feb836d33f7a69d00
This commit is contained in:
Marcin Witkowski 2021-12-21 12:33:07 +01:00 committed by Sam Leffler
parent 679f4e7acb
commit af833e8d19