Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
Date: Wed, 22 Jan 2003 10:40:20 -0500
From: Christopher Faylor <cgf AT redhat DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: sigaction siginfo_t & SIGSEGV
Message-ID: <20030122154020.GD4903@redhat.com>
Reply-To: cygwin AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
References: <83040F98B407E6428FEC18AC720F5D732DB7A1 AT exchange DOT tropicnetworks DOT com> <Pine DOT GSO DOT 4 DOT 44 DOT 0301212320390 DOT 13905-100000 AT slinky DOT cs DOT nyu DOT edu>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <Pine.GSO.4.44.0301212320390.13905-100000@slinky.cs.nyu.edu>
User-Agent: Mutt/1.5.1i

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

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Bug reporting:         http://cygwin.com/bugs.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/