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X-Authentication-Warning:	slinky.cs.nyu.edu: pechtcha owned process doing -bs
Date:	Wed, 22 Jan 2003 12:01:46 -0500 (EST)
From:	Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To:	cygwin AT cygwin DOT com
To:	cygwin AT cygwin DOT com
Subject:	Re: sigaction siginfo_t & SIGSEGV
In-Reply-To:	<20030122154020.GD4903@redhat.com>
Message-ID:	<Pine.GSO.4.44.0301221158570.23429-100000@slinky.cs.nyu.edu>
Importance:	Normal
MIME-Version:	1.0

On Wed, 22 Jan 2003, Christopher Faylor wrote:

> On Tue, Jan 21, 2003 at 11:27:09PM -0500, Igor Pechtchanski wrote:
> >On Tue, 21 Jan 2003, Rolf Campbell wrote:
> >
> >> I'm trying to write an application that can run some code when a certain
> >> memory address is read or written.
> >> My first theory was to use mprotect to remove read/write permissions
> >> from a section and then catch SIGSEGV, but siginfo_t doesn't seem to be
> >> defined.
> >> Is hooking a signal using the 'sa_sigaction' member of 'struct
> >> sigaction' supported in CygWin?
> >>
> >> I noticed that struct siginfo_t is declared in sys/signal.h, but inside
> >> a couple of #ifdef:
> >> #if defined(__rtems__)
> >> #if defined(_POSIX_REALTIME_SIGNALS)
> >>
> >> And it doesn't have the member that I need anyways (si_addr).
> >>
> >> Does anyone know of any other ways of trapping reads/writes to/from
> >> memory regions?
> >>
> >> -Rolf Campbell
> >
> >No, sigaction is not supported on Cygwin.  It's on the TODO list.
>
> That's overstating the situation.  sigaction() is certainly supported in
> cygwin.  The sa_sigaction field in the sigaction struct is not.
>
> cgf

Yes, my apologies.  That's what I get for being too lazy to type 3 extra
characters...
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_		pechtcha AT cs DOT nyu DOT edu
ZZZzz /,`.-'`'    -.  ;-;;,_		igor AT watson DOT ibm DOT com
     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

Oh, boy, virtual memory! Now I'm gonna make myself a really *big* RAMdisk!
  -- /usr/games/fortune


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