[TUHS] user struct on SYSIII / V7

Oliver Lehmann lehmann at ans-netz.de
Sat Nov 14 05:33:20 AEST 2015

Oliver Lehmann <lehmann at ans-netz.de> wrote:

> u module
> $segmented
> $abs %F600
>   global
> _u array [%572 byte]
> end u

By any way - is here someone on the list understanding Z8000 PLZ/ASM? ;)

The problem is, that "u" must be available in the address space on this
location for the kernel to function correctly:

# define UBASE             0x3E00F600      /* kernel virtual addr of  
user struct */

And with the above ASM code, it is placed on 0x0100F600. I also tried
of course $abs 0x3E00F600 but it makes no difference. It is always
placed at 0x0100F600 and I have zero clue why

the original object from the system:

#67 nm /usr/sys/conf/u.o
3e00f600 A _u
01000000 s u_d
     0000 s u_p

my object generated from my u.s:

#68 nm u.o
0100f600 A _u
01000000 s u_d
     0000 s u_p

Somehow I need to get the address right.... This is why I wanted to
look up how the original SYSIII or V7 was doing it (even if the asm
would be of course completely different).

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