On Mar 31 18:46, Jon TURNEY wrote: > Thanks for your help so far. Here's another attempt at this. > > Questions: > > The ContextFlags member of the CONTEXT type is named cr2 in struct __mcontext. I > don't understand how that can be right. It isn't. Please rename cr2 to ctx_flags and add a uint64_t resp. uint32_t value called "cr2" as last member after "oldmask" to struct __mcontext. We're discussing filling cr2 later, it's certainly not a pressing issue. Thanks, Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Maintainer cygwin AT cygwin DOT com Red Hat