One might think of this as follow-on to XSA-451, but that's not quite the right order of events.
There are a few open aspects; see individual patches. 1: remove redundant XEN_SHSTK check from reinit_bsp_stack() 2: record SSP at non-guest entry points 3: traps: use entry_ssp in fixup_exception_return() 4: prefer shadow stack for producing call traces Jan
