Hi 

What I was trying to do is that after you had helped me understand rb chain I 
was trying to get the extents of the load module to ensure that SDWAEC1 and 
SDWAEC2 fall in the range for the appropriate load module before I display the 
offsets

thanks   

-----Original Message-----
From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of 
Peter Relson
Sent: Wednesday, February 7, 2024 1:30 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: XTL64E_EXTENTADDR

In contents supervisor speak, an extent list contains header information and 
then information about the length and address of each (module) extent (whether 
mapped by IHAXTLST or IHAXTL64. 

As the name implies, XTL64E_EXTENTADDR contains the address of the extent for 
this entry. And, not surprising, there is a similar field, also appropriately 
named, that contains the length of the extent.
Applying both to XTLST and XTL64, it is relatively uncommon to need to know the 
information about the extents unless dumping the module. The entry point 
address is more common to use. Since you didn't provide any information about 
what you were intending to do with the information, I have no idea which would 
be better for you.
Peter Relsonz/OS Core Technology Design

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