Passing parameters to MVS macros in AR mode

The rules for passing ALETs to MVS™ macros are similar to the rules for passing ALETs to programs. For programs in AR mode, the system allows you to pass the following ALETs:

An ALET with the value of zero, signifying that the parameter data resides in the caller's primary address space
An ALET that indexes to a public entry on the caller's DU-AL.

Do not pass other ALETs; the system does not support them.

Some of the macros that support callers in AR mode require that parameter lists be in the primary address space. To learn where the input parameter lists must reside, see the macro descriptions in one of the following:

z/OS MVS Programming: Authorized Assembler Services Reference ALE-DYN
z/OS MVS Programming: Authorized Assembler Services Reference EDT-IXG
z/OS MVS Programming: Authorized Assembler Services Reference LLA-SDU
z/OS MVS Programming: Authorized Assembler Services Reference SET-WTO
z/OS MVS Programming: Assembler Services Reference ABE-HSP.

Some macro services accept control parameters from a program. Do not pass a parameter that resides at location zero in a data space to a macro service. Some macros use the value 0 to designate that a parameter list was not specified.