Would
> This is refreshable, and even runs on S/360
PTR DC A(0)
label L R15,PTR
LTR R15,R15
BNZ CALLIT
... ... Code that always
leaves the same value in R15
ST R15,PTR
CALLIT BALR R14,R15
Still incur cache flush?
> -----Original Message-----
> From: IBM Mainframe Discussion List <[email protected]> On
> Behalf Of Seymour J Metz
> Sent: Sunday, February 07, 2021 6:38 PM
> To: [email protected]
> Subject: Re: LINK vs LOAD/CALL
>
> This is refreshable, and even runs on S/360
>
> L R15,PTR
> LTR R15,R15
> BNZ CALLIT
> ... ... Code that always
> leaves the same value in R15
> ST R15,PTR
> CALLIT BALR R14,R15
> ...
> PTR DC A(0)
>
> This is reentrant, and requires at least S/370
>
> RETRY L R1,COUNTER
> LA R0,1(,R1)
> CS R1,,R0,COUNTER
> BNE RETRY
> ...
> COUNTER DC F'0'
>
> I would consider either to be bad form.
>
>
> --
> Shmuel (Seymour J.) Metz
> https://urldefense.com/v3/__http://mason.gmu.edu/*smetz3__;fg!!JmPEg
> BY0HMszNaDT!-
> 1NaByIe2DdFVQi57azbuR3UW5HAMXlA4KDajF5k5WLAnbGJyoxt244VTE368g
> $
>
> ________________________________________
> From: IBM Mainframe Discussion List [[email protected]] on
> behalf of Binyamin Dissen [[email protected]]
> Sent: Sunday, February 7, 2021 1:40 PM
> To: [email protected]
> Subject: Re: LINK vs LOAD/CALL
>
> On Sun, 7 Feb 2021 16:52:55 +0000 Seymour J Metz <[email protected]>
> wrote:
>
> :>Second, you can write code that is reentrant and refreshable, modifies
> itself .......
>
> Only possible if it modifies itself but pays no attention to the modified
> area.
>
> Not really relevant.
>
> --
> Binyamin Dissen <[email protected]>
> https://urldefense.com/v3/__http://secure-
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> ww.dissensoftware.com__;JSUl!!JmPEgBY0HMszNaDT!-
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> A$
>
> Director, Dissen Software, Bar & Grill - Israel
>
>
> Should you use the mailblocks package and expect a response from me,
> you should preauthorize the dissensoftware.com domain.
>
> I very rarely bother responding to challenge/response systems,
> especially those from irresponsible companies.
>
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