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From: dhesi%cirrusl@oliveb.ATC.olivetti.com (Rahul Dhesi)
Newsgroups: comp.lang.c
Subject: Re: Casting to far proc ptr
Message-ID: <2548@cirrusl.UUCP>
Date: 7 Oct 90 03:55:13 GMT
References: <2734@crdos1.crd.ge.COM>
Sender: news@cirrusl.UUCP
Organization: Cirrus Logic Inc.
Lines: 23

(Intel- and Turbo C-specific stuff follows.)

In <2734@crdos1.crd.ge.COM> davidsen@crdos1.crd.ge.COM (Wm E Davidsen
Jr) writes:

>  I need to pass to address of a procedure to a called function. The
>procedure is near static, and I need to cast to far, or assign the
>address to a far ptr.

Even if you can call the function, I think you will have problems,
because it will have been compiled to do a near return.  It will pop 16
bits off the stack and jump there.  (Had Intel reversed the order in
which segment and offset are pushed on the stack in a far call, it
would have been possible to define a far function that could be called
from both near and far.)

Just finding the address of the function shouldn't be difficult,
though.

     far_address = MK_FP(_CS, func);   /* not tested */
--
Rahul Dhesi <dhesi%cirrusl@oliveb.ATC.olivetti.com>
UUCP:  oliveb!cirrusl!dhesi