Rob 

You are correct 7FF…….   Are LSQA type address 

However my question is using VSMLIST SPACE=FREE SP=PVT the returned block 
descriptors are both allocated followed by the free 
Should I not be able to obtain the owning TCB

With VSMLOC for the allocated block ?

Thanks 

> On Sep 7, 2022, at 9:05 AM, Rob Scott <rsc...@rocketsoftware.com> wrote:
> 
> Joseph,
> 
> The example address you posted looks very much like LSQA to me - are you sure 
> it was returned by VSMLIST SP=PVT ?
> 
> Also - did you check the return code from VSMLOC?
> 
> Might be worth capturing a in-flight dump of the target address space and 
> comparing what you are seeing with IPCS VSMDATA.
> 
> Rob Scott
> Rocket Software
> 
> -----Original Message-----
> From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of 
> Joseph Reichman
> Sent: 07 September 2022 13:13
> To: IBM-MAIN@LISTSERV.UA.EDU
> Subject: VSMLIST question
> 
> EXTERNAL EMAIL
> 
> 
> 
> 
> 
> Hi
> 
> 
> 
> Its my understanding that when code the following (below the code for 
> VSMLIST) what gets returned in my work area is the both an allocated followed 
> by free storage this is what on understand from bullet 4 specified in the 
> authorized  Assembler guide page 240
> 
> 
> 
> So for example I could get a block descriptor 00000001  7FFFFF88 00001000 
> 00000001 7FFFFFF88 00000500    now it my understanding the
> first 12 bytes is the allocated block descriptor
> 
> 
> 
> However when I do a VSMLOC on that address I get nothing return in the TCB= 
> field
> 
> 
> 
> 
> 
> 
> 
> I am running this code in SRB mode and move the storage I get returned to 64 
> bit memory object
> 
> 
> 
> thanks
> 
> 
> 
>                Code for VSMLIST
> 
> 
> 
> 
> 
>                       LGF   R8,PSAAOLD              Get Home ASCB
> 
>                       LGF   R8,ASCBASXB-ASCB(,R8)   Get asxb
> 
>                       LGF   R8,ASXBFTCB-ASXB(,R8)   Get First tcb
> 
>                       LGF   R8,TCBJSTCB-TCB(,R8)
> 
> 
> 
> 
> 
>                 Here id the VSMLIST invocation
> 
> 
> 
> 
> 
>                     SAM31
> 
>                     VSMLIST SP=PVT,
> 
>                          WKAREA=((R6),4096),
> 
>                          SPACE=FREE,
> 
>                          TCB=((R8),ALL)
> 
>                    CH    R15,=H'4'
> 
>                    BH    EXITLST
> 
>                    SAM64
> 
> 
> 
> 
> 
> 
> 
> 
> 
> From the Authorized Assembler guide page 240
> 
> 
> 
> 
> 
>      This figure describes the work area that VSMLIST produces when you use 
> SP=PVT. Note: 1. The number of subpools in the private area is a 31-bit 
> number.
> 
>                  2. The address of the TCB is contained in a fullword.
> 
>                  3. Figure 37 on page 218 shows the format of the allocated 
> storage information for the subpools owned by each TCB.
> The storage information begins at offset 0, "number of subpools" in that 
> figure.
> 
>                  4. If you specify SPACE=FREE, free space information follows 
> each allocated block descriptor. Figure 42 on page
> 221 describes the format of the free space information.
> 
> 
> 
> 
> 
> 
> 
>                  Code for VSMLOC
> 
> 
> 
>                        SAM31
> 
>                        VSMLOC PVT,AREA=((R3),(R4)),TCB=TCBW
> 
> 
> 
> 
> 
> 
> 
> 
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