+ ;; Unblock trap signal here, we unwound the stack and can't return.
+ ;; FIXME: Should we not reset the _entire_ mask, but just
+ ;; restore it to the state before we got the condition?
+ ;; FIXME 2: Signals are currently unblocked in
+ ;; interrupt.c:internal_error before we do stack unwinding, can this
+ ;; introduce a race condition?
+ #!+(and linux mips)
+ (sb!unix::reset-signal-mask)