[TUHS] user struct on SYSIII / V7

[Brantley Coile]

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> On Nov 13, 2015, at 2:38 PM, Brantley Coile <brantleycoile at icloud.com> wrote:
> 
> For performance reasons an assembly symbol "u" was defined to be a fixed address. That allowed us to use constructions like u.u_procp to generate a single address.  It was very fast. Does this help?
> 
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> 
>> On Nov 13, 2015, at 2:33 PM, Oliver Lehmann <lehmann at ans-netz.de> wrote:
>> 
>> 
>> 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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