Assembler reentrant entry and exit linkage

To see an example of how to code the reentrant entry and exit linkage for a local assembler check routine, see sample check HZSSCHKR in SYS1.SAMPLIB or on the Web at:

http://www-03.ibm.com/servers/eserver/zseries/zos/hchecker/

For more information about entry and exit linkage, see the following topics in z/OS MVS Programming: Assembler Services Guide:

Linkage Conventions
Example of Using the Linkage Stack

Note that for Metal C checks, you do not have to specify this assembler linkage. All you need to do is specify compiler option RENT - See Building Metal C checks.