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From: kim@mcrware.UUCP (Kim Kempf)
Newsgroups: net.micro.6809
Subject: Re: MW C--_eprof???
Message-ID: <162@mcrware.UUCP>
Date: Thu, 30-Jan-86 08:51:58 EST
Article-I.D.: mcrware.162
Posted: Thu Jan 30 08:51:58 1986
Date-Received: Fri, 7-Feb-86 21:09:19 EST
References: <3500127@uokvax.UUCP>
Organization: Microware Systems Corp., Des Moines, IA
Lines: 33

> In article <3500127@uokvax.UUCP> James Jones writes:
>
> Help!  I'm busy hacking on a program, and I thought I'd profile it and see
> where it was spending its time..."OK, so just cc -p and Bob's your uncle!"
> I said to myself, but when the dust cleared, c.link said
> 
> 	Undefined symbol
> 	     _eprof
> 
> and stuck its tongue out at me.  (I am using Microware's C compiler under
> OS-9/6809, by the way...)  So, what do I need to do to pacify the gods of
> the linker?  What is _eprof?  (and why is c.link saying such horrible things
> about him?)
This was a development boo-boo.  _eprof is a function used to provide a compiler
trace of functions executed.  The actual function was ommited from the library.
It doesn't matter anyway because the arguments to _eprof wiped out the X
register which has the effect of destroying long/double return values.

The best way around this bug is to patch out this string from the object code.
Dump the binary of c.comp.  After approx. $9A00 the string containing _eprof
should be found.  Backup to the 0 (null) byte at the beginning of this string
(which is the end of the previous string) and place a new null byte at the
start of the string containing the _eprof.  This has the effect of removing
the call to _eprof.

This problem will be fixed for good in the next release of the 6809 C Compiler.

----------------
Kim Kempf, Microware Systems Corporation

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