z/OS TSO/E Programming Services
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Passing Control to IKJEFTSI

z/OS TSO/E Programming Services
SA32-0973-00

Invoke the TSO/E Service Facility initialization routine using one of the following methods:
  • The CALLTSSR macro instruction, specifying IKJTSFI as the entry point name
  • The LINK macro instruction, specifying IKJEFTSI (or TSOLKI, the alias of IKJEFTSI), as the entry point name
  • The address of IKJEFTSI that is in the TSVTTSFI field of the TSVT.

You must first create the IKJEFTSI parameter list and place its address into general register 1.

Standard linkage conventions are:
  • Register 1 must contain the address of a parameter list.
  • Register 13 must contain the address of an 18-word save area.
  • Register 14 must contain the return address.
  • Register 15 must contain the entry point address.

IKJEFTSI must receive control in 31-bit addressing mode. IKJEFTSI accepts input above or below 16 MB in virtual storage. The caller's parameters must be in the primary address space.

Parent topic: TSO/E Service Facility Initialization Routine IKJEFTSI

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