Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.Approved by: re (implicit)Sponsored by: The FreeBSD Foundation
Also the stop function should accept 64-bit exception class.
- Sizeof exception class type should always be 64-bit.- Make some functions be visible to BSD source code.
Import unwind.h from libunwind-0.99.Approved by: core (kib, rwatson, imp, brooks)