Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!rice!sun-spots-request
From: tac@cs.brown.edu (Theodore A. Camus)
Newsgroups: comp.sys.sun
Subject: Re: Reading a Function's Return Address
Keywords: Miscellaneous
Message-ID: <10158@brazos.Rice.edu>
Date: 23 Jul 90 19:14:41 GMT
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Organization: Sun-Spots
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Approved: Sun-Spots@rice.edu
X-Refs:  Original: v9n268
X-Sun-Spots-Digest: Volume 9, Issue 277, message 5
Originator: spots@titan.rice.edu

>Has anyone attempted and succeeded in coding a 'C' fragment which can be
>used on a SPARC to determine a function's caller's return address from
>within the function? 

Just put the following in  'file.s'  :

	.seg	"text"
	.global _getaddr
_getaddr:
	retl
	add	%i7,8,%o0

and link in file.s (just pretend it's a C source file).  Now you can just
say :  this_functions_return_address_is  = getaddr(); in the callee.  This
will give you the point in the caller where the callee will return to.
This value minus 8 is the address of the statement which actually called
the function you're in.  

                           - Ted