[0/2] : x86/traps: improve show_trace()'s top-of-stack handling

Message

Jan Beulich May 31, 2019, 8:59 a.m. UTC

1: guard top-of-stack reads
2: widen condition for logging top-of-stack

The issue patch 2 fixes (a curious lack of an intermediate call stack
entry) was observed in practice; patch 1 is a result of me just looking
at the code (and if I have missed some aspect of why this isn't a
problem in reality, that patch could be easily dropped).

Jan