Date: Sun, 18 Jul 1999 22:49:08 -0600 From: Wes Peters <wes@softweyr.com> To: Alfred Perlstein <bright@rush.net> Cc: Dag-Erling Smorgrav <des@flood.ping.uio.no>, hackers@FreeBSD.ORG Subject: Re: Determining the return address Message-ID: <3792AE44.9CAC4953@softweyr.com> References: <Pine.BSF.3.96.990717155538.14320Z-100000@cygnus.rush.net>
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Alfred Perlstein wrote:
>
> On 17 Jul 1999, Dag-Erling Smorgrav wrote:
>
> > Is there any (evidently non-portable) way of determining a function
> > instance's return address? I have an idea or two that involves the
> > return address and dladdr(). The code I currently use looks like this:
>
> This looks like what you are doing is trying to grab the data on the
> stack before "log" which is the return address. I doubt this is
> at all portable and may fail because of optimizations and ABI, such
> as archs that store the return address in a register...
On the SPARC, FWIW, the return address is in %i7. What is difficult to
determine (programmatically) is if the function is a normal or leaf function;
different return sequences are used for each.
--
"Where am I, and what am I doing in this handbasket?"
Wes Peters Softweyr LLC
http://softweyr.com/ wes@softweyr.com
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