No. Most compiled languages, including PL/1, don't do forward chaining.
We did it by ourselves for years to make the SYSUDUMPs more readable.
But in the end we gave up and wrote our own dump routine which follows the
back chain starting from reg 13. In the LE manuals it is explicitly
stated that
LE does intentionally not do the forward chaining, although forward chaining
has been an OS convention from the start, AFAIK.
IMHO, the designers of LE violated the OS design principles for a long
time,
until - in the end - LE became part of the OS, and the OS conventions
somehow
got lost.
Kind regards
Bernd
McKown, John schrieb:
What if R13 has been destroyed somehow? You can do forward chaining by starting
at TCBFSA to the first save area, then using the pointer in word 3 of the save
areas to chain forward until it is zero. That is what the SYSUDUMP formatter
does. But I do agree that the forward chain is not always reliable. It is for
every compiled language that I'm aware of. But it depends on the HLASM
programmer following the convention if there is any assembler along the line.
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