You can invoke the TSO/E IKJURPS service with one of the following methods:

• The CALLTSSR macro instruction, specify IKJURPS as the entry point name
• The LINK macro instruction, specify IKJURPS as the entry point name
• The address of IKJURPS that is in the TSVTURPS field of the TSO/E vector table (TSVT).

On entry to the IKJURPS service, it expects the following register linkage conventions:

Register 0

n/a

Register 1

Address of the parameter list

Registers 2–12

n/a

Register 13

Key 8 save area

Register 14

Return address

Register 15

Entry point address.

IKJURPS must be invoked in:

• 31-bit addressing mode
• Primary address space mode.