Re: 2.2.x kernels not filling in siginfo_t.si_addr on SEGV?

[Camm Maguire <camm@enhanced.com>]

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Greetings, and thank you so much for your helpful reply!  Was this on
an i386?  I'm specifically looking for a way to do his on arm, alpha,
and sparc, and I don't believe they have the cr2 member of struct
sigcontext.  Any info you might have, including where you found this
solution, would be appreciated!

Take care,

David Watson <dwatson@cs.ucr.edu> writes:

> > Greetings!  Shouldn't a SIGSEGV fill in th si_addr member of the
> > siginfo_t structure passed to a signal handler?  Here is what I see
> 
> Our group ran into this problem last summer while we were developing the
> Oasis+ DSM system.  We worked around it by utilizing the following code
> fragment:
> 
> void fault_handler(int sig, siginfo_t *sip, ucontext_t *ucp)
> {
> 	void *addr;
> 
> 	addr = (void *) ucp->uc_mcontext.cr2;
> 
> 	...
> }
> 
> Hope that helps.
> 
> Regards,
> David
> 
> -- 
> The theory of groups is a branch of Mathematics in which one does
> something to something and then compares the result with the result
> obtained from doing the same thing to something else, or something else to
> the same thing.
> J. R. Newman
> 
> 
> 

-- 
Camm Maguire			     			camm@enhanced.com
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"The earth is but one country, and mankind its citizens."  --  Baha'u'llah