In article <caarmm9rskjgk-ypgufnhowtvkpbjbykdk0cr2i3vnnrrurx...@mail.gmail.com> 
you wrote:
> On 21 October 2014 10:09, Tom Marchant <
> 0000000a2a8c2020-dmarc-requ...@listserv.ua.edu> wrote:
> > I've never seen a case where "BALR is used to return to the caller."

> Well... Here's the epilog code for a non-main function generated by an
> oldish version of IBM C:

> 00010E                    Start of Epilog
> 00010E  58D0  D004        00413 |                 L     r13,4(,r13)
> 000112  58E0  D00C        00413 |                 L     r14,12(,r13)
> 000116  9824  D01C        00413 |                 LM    r2,r4,28(r13)
> 00011A  051E              00413 |                 BALR  r1,r14
> 00011C  0707              00413 |                 NOPR  7
> 00011E  0000

> 000120                    Start of Literals
> 000120  0100018D                                        =F'16777613'
> 000124  05000194                                        =F'83886484'
> 000128  0900019A                                        =F'150995354'
> 00012C                    End of Literals

> Why they use[d] BALR I don't know, but surely they don't plan to return to
> the NOPR and the certain program check that follows. Perhaps the NOPR can
> be changed to something else for debugging.
> Tony H.

It's just a way to pass a parm to the library epilog routine. I would
guess that '7' just means 'normal epilog'. The library looks at what
R1+1 contains and makes various decisions based on the value. 

-- 
Don Poitras - SAS Development  -  SAS Institute Inc. - SAS Campus Drive
sas...@sas.com           (919) 531-5637                Cary, NC 27513

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