XENIX System V Release 2.0 for PC/AT Problems in Device Driver Installation

[dennis j. doherty]

> I am trying to add a device driver to XENIX System V on an IBM PC/AT.
> I have run into several problems.  
> 
> Problem 1)  The most serious problem is that 
> when I load in any code, even irrelevant code which would never be 
> referenced by any other routine, PS stops working.  The following is the 
> file which I am loading.
> 
> 
> ##### start of file link_xenix
> 
> [ -f xenix ] && mv xenix xenix-
> ld -Mm -D 18 -B 20 -A 0 -o xenix KMseg.o oemsup.o c.o space.o picmask.o termsw.o avdriver.o ./mdep/lib_mdep ../sys/lib_sys ../io/lib_io ../io/lib_io.stubs Klibc.a 
> echo "RESULT IS IN FILE xenix"
> 
> ##### end of link_xenix
> 
> After /etc/haltsys one eventually gets to:
> 
> boot
> :/usr/sys/conf/xenix		{This is the new xenix}
> 
> Then after some initialization, we are in the new XENIX.
> Now, ps gives the following message.
> 
> # ps
>    PID TTY TIME COMMAND
> ps: seek error
> #
> 
> This error comes up fairly reliably as long as avdriver.o adds at least
> 130 bytes to the xenix kernel.  I tried moving avdriver.o to the end of the 
> load list, after all the files which have "lib" in their names.  This
> did not improve the situation.  PS still fails.
> 
The problem is that ps look at /xenix for all its offset info for the core
image of unix but the kernel that is loaded in core is not the same as 
/xenix so ps can not find any tables (ei. proc, text,...).
what you have to do is move the new kernel from /usr/sys/conf/xenix  to
/xenix and then haltsys and let it boot up normally.
> Problem 2)  make space.o fails.  The cc compiler complains that it is out
> of heap space.  This is true even if no changes have been made to space.c.
> 
There are changes make to space.c.  As soon as you run the config command
it updates space.c and make knows to recompile it.  Why it doesn't compile
I don't know. I have been able to make a new kernel???

> Problem 3)  The ld command described above does not appear to recognize 
> ../io/lib_io.stubs as a library routine and complains if one of the
> routines stubbed out in ../io/lib_io.stubs is loaded before ../io/lib_io.stubs.
> This completely defeats the purpose of the stubs in the first place.  See
> /usr/sys/conf/README.
> 

Not sure what you mean???

> Problem 4)  The ld command is not completely documented.  The -l switch
> is mentioned in the documentation, see the last paragraph of page 4-1, but
> it is not documented anywhere.  That's not too bad because it is documented
> in other versions of UNIX.  The -D and -B switches are likewise not 
> documented in the XENIX documentation.  I have never run into these
> switches before and I have no idea what they mean.

There is no GOOD documentation?!?!?!





					Yours in UNIX

					Dennis J. Doherty
					(206) 763-5169
					{decvax|btlunix}!bcsaic!djd


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