Assembler programe is abending in divide instruction

thanoozm · New User Joined: 23 May 2007 Posts: 26 Location: hyderabad

Hi All,

Thanks for your help. I have changed register loading, now it is working fine.

Thanks to robert and bill.

thanoozm · New User Joined: 23 May 2007 Posts: 26 Location: hyderabad

Hi Robert,

Where can i see the memory location 00000072 and it's values. I am searching for that and i didn't find. I find the R3 value and i couldn't find the memory value, This for know the things.

problem is resolved, thanks for your help.

Thanks,
Thanooz.

Robert Sample · Posted: Sun Dec 06, 2009 6:30 pm

Low memory locations are reserved for use by the operating system -- using location 00000072 should only be done by the system; if your registers are pointing there then it is a problem. You usually don't see them in a dump since they are rarely relevant to an application abend.

PeterHolland · Posted: Sun Dec 06, 2009 7:31 pm

Well you can access locations like that, e.g. the CVT.
But its readable not writeable.

dick scherrer · Posted: Sun Dec 06, 2009 11:54 pm

Hello,

So, unless the code references system data areas (i.e. control blocks), 72 is not going to be a proper address for the code to reference.

However, registers contain "things" other than addresses. . . Length, count, displacement, etc. . .

Garry Carroll · Posted: Mon Dec 07, 2009 1:06 pm

The address off R3 is in the operating system's area. You don't need to see the contents to know that that's not where you should be addressing.
Your literals appear to be based off R3 at low locations. What is your base register for the program and why are these values not at offsets from that base?

Garry.

thanoozm · New User Joined: 23 May 2007 Posts: 26 Location: hyderabad

Hi Garry,

I have used R3 for variable 'EXPLP` field length of 2 bytes that is declared in CSECT area. After that LTORG is started, So all literals are used as r3 and offset. I have removed variable from CSECT and declared in DSECT, it has worked. EXLP is external to this module.

Thanks,
Thanooz