Path: utzoo!censor!geac!torsqnt!lethe!yunexus!ists!helios.physics.utoronto.ca!news-server.csri.toronto.edu!cs.utexas.edu!usc!elroy.jpl.nasa.gov!ncar!gatech!rutgers!cbmvax!peter
From: peter@cbmvax.commodore.com (Peter Cherna)
Newsgroups: comp.sys.amiga.tech
Subject: Re: SAS Library
Message-ID: <17232@cbmvax.commodore.com>
Date: 8 Jan 91 17:14:21 GMT
References: <56669.663204707@atronx.OCUnix.On.Ca>
Reply-To: peter@cbmvax.commodore.com (Peter Cherna)
Organization: Commodore, West Chester, PA
Lines: 43

In article <56669.663204707@atronx.OCUnix.On.Ca> rwm@atronx.OCUnix.On.Ca (Russell McOrmond) writes:
>
>  Here is a message from a friend that has a question:  If possible could
>you respond to: David.Jones@p8.f109.n163.z1.fidonet.org
>
>For some reason, BLINK is not correctly generating the offset to the global
>data (stored off A4) from the value present in A6.  I have tried to make a
>very small "test" library.  The offset generated by BLINK is always zero,
>i.e. the function prologue is
>
>LEA  LinkerDB(A6),A4
>
>and the linker seems to be using zero for LinkerDB.  The funny thing is
>that I linked my test library a few days ago and nothing has changed - the
>sources are directly from the SAS source directory.  Two questions:

You must link in the order libent.o+libinit.o+yourstuff.o

LinkerDB is evaluated when libinit.o is linked, and is not valid until
AFTER libinit.o is linked.  Therefore, you cannot access any global
data inside libinit.o or any modules linked prior to it, unless you
access them off your library base.

In particular, ignore the comment in libinit.c that states:

"Do library specific public initialization here"

If you have any of that to do, do it as a separate routine called from
this point, with the routine itself located in another module.

It's a little arcane.

>  Russell McOrmond   rwm@Atronx.OCUnix.On.Ca   {tigris,alzabo,...}!atronx!rwm 
>  FidoNet 1:163/109  Net Support: (613) 230-2282
>  Amiga-Fidonet Support  1:1/109


     Peter
--
     Peter Cherna, Software Engineer, Commodore-Amiga, Inc.
     {uunet|rutgers}!cbmvax!peter    peter@cbmvax.commodore.com
My opinions do not necessarily represent the opinions of my employer.
"Oh, PIN-compatible!  I thought you wanted me to make it IN-compatible!"