[PATCH][4.3] Deprecate -ftrapv

[Florian Weimer]

* Ross Ridge:

> At the risk of my curiousity getting me into more trouble, could any
> one explain to me how to access these "eip" and "trapno" members from
> a signal handler on Linux?  I can't find any relevent documention with
> man nor Google.

I think you need sigaction with a SA_SIGINFO, and chase structs from the
ucontext_t argument inside the signal handler.  MLton contains example
code, and likely GCJ and OpenJDK as well.