Accessing signal context from a handler
Thu Oct 27 06:40:00 GMT 2005
On Wed, Oct 26, 2005 at 05:56:15PM -0400, Christopher Faylor wrote:
> On Wed, Oct 26, 2005 at 09:36:53PM +0000, Adam Irawan wrote:
> >Igor Pechtchanski <pechtcha <at> cs.nyu.edu> writes:
> >> On Mon, 15 Jul 2002, Christopher Faylor wrote:
> >> > On Mon, Jul 15, 2002 at 01:00:23PM -0400, Igor Pechtchanski wrote:
> >> > >Does Cygwin allow accessing the context (register state, etc) of the
> >> > >faulted instruction from a signal handler installed by sigaction(),
> >> > >similar to ucontext/mcontext in Linux? [snip]
> >> >
> >> > It's not available.
> >> > cgf
> >> [snip snip]
> >> Basically, I'm trying to port an application that intercepts SIGSEGV and
> >> makes decisions based on the IP of the faulted instruction. The
> >> application currently uses the sigaction/ucontext mechanism in Linux.
> >> Any suggestions on how to do this in Cygwin (preferably similar to the
> >> Linux code, to maximize reuse) would be appreciated.
> >> [snipped the code bit]
> >Wow, dug up an ancient post today that seems to relate to my current problem
> >more than anything else I've searched for. Just wondering, has there been
> >changes regarding this topic at all? Thanks alot,
> It's not available.
You left out the bit where ucontext used to not be passed at all, but
in current snapshots it's passed as a null pointer...
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