z/VM: CP Planning and Administration - z/VM - IBM

System Configuration Fileexample, if you had zero-length CSECT XXXDOG to load, you would add“EXPAND XXXDOG(8)” to your input file.2. When invoking your files, CP treats each entry point in a CSECTindependently for the MP attribute.3. The customer-written CP routines that you are loading must be on a disk thatCP has access to when the load operation is done. If you have a CPXLOADstatement in your system configuration file that specifies the NODELAYoperand, the customer-written CP routines must be a file on the parm diskbecause the minidisks specified on CP_ACCESS statements are not availableuntil the end of the initialization process. If your CPXLOAD statement specifiesthe DELAY operand, the customer-written CP routines can be on any disk, aslong as you have specified a CP_ACCESS statement for that disk in yourconfiguration file. For more information about the CP_ACCESS statement, seepage 70.4. You can specify run-time and load operands on either the CPXLOADstatement or the OPTIONS directive, or both. However, if you specify optionson both and those options conflict, CP uses the options from the CPXLOADstatement. For example, suppose you specify PERMANENT on the OPTIONSdirective and TEMPORARY on the CPXLOAD statement, CP will load the CProutines as temporary. For more information about the OPTIONS directive andseveral other directives, see the z/VM: CP Exit Customization book.5. To assign entry points and external symbols to an exit point and to enable ordisable that exit point, use the ASSOCIATE EXIT statement (page 60) orcommand. For more information about the ASSOCIATE EXIT command, seethe z/VM: CP Commands and Utilities Reference.6. To assign an external symbol to a local message repository, use theASSOCIATE MESSAGES or MSGS statement (page 64) or command. Formore information about the ASSOCIATE MESSAGES or MSGS command, seethe z/VM: CP Commands and Utilities Reference.7. To display information about customer-written CP routines loaded by theCPXLOAD statement, use the QUERY CPXLOAD command. For moreinformation, see the z/VM: CP Commands and Utilities Reference.8. To display information about external symbols you may have loaded, use theLOCATE SYMBOL command. For more information, see the z/VM: CPCommands and Utilities Reference.9. To remove CPXLOADed files from CP’s system execution space:a. Use the DISASSOCIATE command to revoke all entry point and externalsymbol assignments made with the ASSOCIATE EXIT, MESSAGES, orMSGS statements or commandsb. Use the CPXUNLOAD command to unload the customer-written CProutines.For more information about the commands listed above, see the z/VM: CPCommands and Utilities Reference.10. For more information about loading customer-written CP routines into CP’ssystem execution space, about run-time and load operands, and aboutCPXLOAD directives, see the z/VM: CP Exit Customization book.11. CPXLOAD provides the ability to load executable code, message repositories,and data modules dynamically. Only compiled files may be loaded. Thesecompiled files would be the TEXT file output from the assembler or from theCMS GENMSG command.Chapter 6. The System Configuration File 79