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Status Not under consideration
Workspace IBM HourGlass for z/OS
Created by Guest
Created on Jun 17, 2013

RELATED IDEAS

IBM HourGlass should support XPLINK and 64-bit C programs

There are three combinations of linkage conventions and addressing modes supported by the IBM XL C/C++ compiler on z/OS: 31-bit non-XPLINK, 31-bit XPLINK and 64-bit XPLINK. XPLINK provides performance benefits and 64-bit addressing mode provides storage and, possibly, performance benefits (especially for DB2 C applications).

As shown in the referenced PMR, the C language patch included with IBM HourGlass 6.1 presently only supports the first of these (31-bit non-XPLINK). The lack of support for the other two combinations (31-bit XPLINK and 64-bit XPLINK) is not mentioned in the HourGlass documentation.

HourGlass should be enhanced to support the 31-bit XPLINK and 64-bit XPLINK combinations of link conventions and addressing mode for C programs.

Idea priority High
  • Guest
    Reply
    |     Oct 23, 2020

    Whilst this requirement is valid, based on our current plans and priorities, it is not likely that this could be implemented in the next 12 months. Correspondingly this requirement is being declined at this point. The requirement will be kept in the RFE system and might be reassessed in the future. You also have an opportunity to resubmit in twelve months time if you wish it to be reconsidered then.

  • Guest
    Reply
    |     Nov 19, 2015

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - Enterprise Tooling
    Product - IBM HourGlass

    For recording keeping, the previous attributes were:
    Brand - WebSphere
    Product family - Enterprise Tooling
    Product - IBM HourGlass

  • Guest
    Reply
    |     Jun 20, 2013

    Hi,

    I have developed a patch to allow HourGlass to work with 31-bit XPLINK C programs. (I have not attempted to do the same for 64-bit XPLINK C programs.) This fixes the problem for us. The patch is as follows (also copied in the referenced PMR).

    ----------------------------------------------------------------

    The following patch (for z/OS V1.11) replaces the STCK instruction with an MVS TIME STCK macro in CSECTs @@TOD and @@TODMVS in LE load module CELHV003, thus allowing HourGlass 6.1 to intercept calls made to C function time() and its derivatives from 31-bit XPLINK C programs. This patch is logically equivalent to the standard HourGlass 6.1 patch for 31-bit non-XPLINK C programs described in hlq.SAGGPINT (AGG$C). The patch described here does not conflict with or interfere with the standard patch. Either one can be applied alone or both can be applied in any order. (Note that XPLINK programs are very sensitive to ALL registers being saved accross an LE call. This is why additional instructions are needed in the $$TODMVS patch. The additional instructions overlay the copyright notice in that CSECT.)

    Step 1 - Copy member CELHV003 from LE library hlq.SCEERUN2 to the
    site's HourGlass patch library (this is the same library as specified
    by DD UTLOAD in member AGG$C).

    Step 2 - Run AMASPZAP to perform the following changes to the copied
    load module:

    NAME CELHV003 $$TOD
    VER 0000 B205,D028
    REP 0000 410D,0028
    REP 0004 4110,0004
    REP 0008 0A0B
    REP 000A 0700,0700
    NAME CELHV003 @@TODMVS
    VER 0000 B205,1020
    VER 0048 F5F6,F9F4,60C1,F0F1,40F5,F6F8,F860,F1F9,F840,4040,40C3
    REP 0000 47F0,F048
    REP 0048 5020,1000
    REP 004C 90E1,1004
    REP 0050 1821
    REP 0052 4101,0020
    REP 0056 4110,0004
    REP 005A 47F0,F006
    REP 0006 0A0B
    REP 0008 1812
    REP 000A 98E1,1004

    Step 3 - Ensure the library containing the patches appears before both hlq.SCEERUN and hlq.SCEERUN2 standard LE libraries in any JOBLIB or STEPLIB concatenation.

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