Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!panews.awdpa.ibm.com!qe2.awdpa.ibm.com!steve
From: steve@panews.awdpa.ibm.com (Steve DeJarnett)
Newsgroups: comp.unix.aix
Subject: Re: Compiling Device Drivers for AIX 3.1
Keywords: device driver
Message-ID: <1991Mar26.180437.25868@ibmpa.awdpa.ibm.com>
Date: 26 Mar 91 18:04:37 GMT
References: <39757@netnews.upenn.edu>
Sender: news@ibmpa.awdpa.ibm.com (news id)
Reply-To: steve@qe2.awdpa.ibm.com (Steve DeJarnett)
Organization: IBM Personal Systems Programming, Palo Alto
Lines: 22

In article <39757@netnews.upenn.edu> massa@eniac.seas.upenn.edu (Michael Massa ) writes:
>Does anyone know the correct "ld" options for linking a device driver?

	cc -o yourdd yourdd.o -eyour_entrypoint -bimport:/lib/kernex.exp 
-bimport:/lib/syscalls.exp -lsys -lcsys

Note that this should all be on the same line.

>Anytime I access autoinitialized global variables or use a string constant
>in my code, I generate an instruction storage interrupt. I suspect I'm
>linking wrong. Thanks.

	You were probably getting a libc routine instead of the corresponding
kernel-mode routine.  This sounds very familiar.  Everyone I know has had this
happen at least once during driver development.

	Hope that helps,

Steve DeJarnett			Internet: steve@ibmpa.awdpa.ibm.com
IBM PSP Palo Alto		UUCP:	  uunet!ibmpa.awdpa.ibm.com!steve
(415) 855-3510			IBM VNET: dejarnet at ausvmq
These opinions are my own.  I doubt IBM wants them.......