Register Contents

Table 1 gives the contents of the registers when RLSWAIT is entered in 31–bit mode.

Table 1. Contents of registers for RLSWAIT exit routine
Register	Contents
1	Address of the user RPL. If a chain of RPLs was passed on the original record management request, this is the first RPL in the chain.
12	Reserved and must be the same on exit as on entry.
13	Reserved and must be the same on exit as on entry.
14	Return address. The exit must return to VSAM using this register.
15	Address of the RLSWAIT exit.

The RLSWAIT exit must conform to the following restrictions:

The exit must return to VSAM using register 14 and it must return with the same entry environment. That is, under the same execution unit as on entry and with the same cross-memory environment as on entry.
The exit must not issue any request using the RPL passed in register 1.
The exit must be reentrant if multiple record management request that use the exit can be concurrently outstanding.