On Fri, 25 Jun 2021 15:16:57 -0400, Barry Lichtenstein <bar...@us.ibm.com> wrote:
Should have been more clear (and replied to OP), I meant the redbook is outdated! Vendor Interfaces also has lots of useful and current information! >On Mon, 21 Jun 2021 17:55:49 -0400, Tom Marchant <m42tom-ibmm...@yahoo.com> >wrote: > >I think that's rather old and outdated. It cites the reasons for Xleaf only >as because there's no WSA and no call mechanism from assembler. Both of those >were remedied. Start with the XL C/C++ Programming Guide here >https://www.ibm.com/docs/en/zos/2.4.0?topic=programs-xplink-assembler and also >look at the CEEPDDA and CEEPLDA macros in the Language Environment Programming >Guide for how to work with your own WSA variables. > >>Documentation for XPLINK and XPLINK64 is in the LE Vendor Interfaces manual. >> >>-- >>Tom Marchant >> >>On Wed, 16 Jun 2021 21:56:41 +0000, Richard Way <richard....@microfocus.com> >>wrote: >> >>>I'm rather confused about the requirements for converting an existing AMODE >>>31 "ordinary" assembler program to one that can participate in an XPLINK >>>lp64 environment, and I'm hoping one or more of you can help me to clarify >>>this. >>> >>>I found documentation here --> >>>http://www.redbooks.ibm.com/redbooks/pdfs/sg245991.pdf, in section 4.2.1 >>>starting on page 24 that tells me what the register conventions are in >>>XPLINK as well as the restriction that my module cannot call other modules >>>(which is fine, it doesn't.) That section also explains the required prolog >>>and epilog macros. Some of the information is confusing to me though - for >>>example, in one section it says all XPLINK assembler code must be "leaf" >>>modules that don't call other modules, then it talks about the DSASIZE >>>parameter on the prolog macro being used to "buy" a stack frame, and then >>>adds that "XPLINK leaf (Xleaf) routines may not "buy" a stack frame!" >>>(emphasis mine.) This seems contradictory, so I must not be understanding it. >>>
