How do you do this at runtime in a fast way?
I would first walk up the save area, get the entry point address of the
caller and look if there is the LE signature at position 4 (X'01' followed
by 'CEE'), so I know that is is a PL/1 or C compiler (maybe COBOL, too,
I'm not sure about this). Then I could examine the PPA1, where the name of
the function is stored. But, IMHO, to get the information about the compiler
(and the language, and the version, etc.), I have to read the IDR records
of the load module, isn't it?
The old PL/1 compilers start with STM at the entry point and have the
name of the CSECT immediately before the EP.
Kind regards
Bernd
Am 07.04.2012 01:30, schrieb Steve Comstock:
On 4/6/2012 5:23 PM, Ken Brick wrote:
many years ago I needed to know, in DOS/VS, whether an assembler
routine was
called from a PL/I or assembler module. I put in a test to see if in
DOS terms
the weak extrn PLIMAIN was not 0. Non zero meant a PL/I module was
present.
Ken
On 7/04/2012 03:46 AM, Phil Smith wrote:
Is there a reliable way to tell we were called by PL/I? If so, we
could ignore
zeroes for PL/I. And document it. ISTR there being a magic fullword
in the
savearea for PL/I?
Well, you could maybe do the same thing about the
PL/I LE signature CSECT, CEESG011.
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