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To: Camm Maguire <camm@enhanced.com>,
       debian-alpha <debian-alpha@lists.debian.org>,
       linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: SA_SIGINFO in Linux 2.4.x
References: <E17aOg0-0002ub-00@intech19.enhanced.com>
	<1028281936.17352.42.camel@satan.xko.dec.com>
From: Daniel Barlow <dan@telent.net>
Date: Fri, 02 Aug 2002 13:41:35 +0100
In-Reply-To: <1028281936.17352.42.camel@satan.xko.dec.com> ("Aneesh Kumar
 K.V"'s message of "02 Aug 2002 15:22:16 +0530")
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On Fri, 2002-08-02 at 04:14, Camm Maguire wrote:
> Greetings!  The 2.4.x kernels on alpha don't appear to be filling in
> the si_addr element of the siginfo_t structure when a signal handler
> is setup with SA_SIGINFO.  Is this right?  Any other way to get this
> address in the handler?

You may be able to use the third argument to the signal handler:
given a handler declared as (int n, siginfo_t *info,struct ucontext *context),
look at context->uc_mcontext.sc_traparg_a0 

SBCL has been doing this for a few months now and nobody has yet
complained that it's broken for them.  Look for arch_get_bad_addr 
in http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/sbcl/sbcl/src/runtime/alpha-arch.c?rev=1.14&content-type=text/vnd.viewcvs-markup



-dan

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