End function (function code X'FF')

This function of the session management exit routine is processed after entering a HALT, a HALT QUICK, or a MODIFY EXIT,OPTION=INACT command. This function should perform any cleanup required and return processing to VTAM®. HALT CANCEL causes VTAM to abend. In this case, the end function is not processed. See z/OS Communications Server: SNA Operation for more information about these commands.

Table 1 shows the parameter list pointed to by register 1. The parameters are described in Parameter descriptions.

Table 1. End function parameter list
Dec (Hex) Offset	Size (Bytes)	Description
0 (0)	4	Address of environment vectors
4 (4)	4	Address of exit routine function code
8 (8)	4	Address of user data field
16 (10)	4	Address of a parameter string if you specify a value for the PARMS operand on the MODIFY EXIT command. The parameter string is in the form of a 2-byte length field followed by the actual character data. If you do not specify a value, this pointer will be zero.
72 (48)	4	Address of VTAM exit services parameter list