Re: SA_SIGINFO in Linux 2.4.x

Daniel Barlow (dan@telent.net)
Fri, 02 Aug 2002 13:41:35 +0100

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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