Exit routine environment
The start/stop exit routine receives control in the following environment:
| Environmental factor | Requirement |
|---|---|
| Authorization: | Supervisor state and PSW key 0 |
| Dispatchable unit mode: | Task |
| Cross memory mode: | PASN = HASN = SASN |
| AMODE: | 31-bit. All passed areas can be above 16 megabytes in virtual storage. |
| ASC mode: | Primary |
| Interrupt status: | Enabled for I/O and external interrupts |
| Locks: | No locks held |
| Serialization: | Component trace prevents multiple conflicting commands from being processed simultaneously. |
| Location: | The start/stop routine must be in
LPA or the LNKLST concatenation. If the start/stop routine is in LPA, the system passes control to the module at that location, and the module is not page-fixed. Otherwise, the system places the start/stop routine into the fixed common service area (CSA). |
Exit Recovery: The start/stop routine must supply its own ESTAE-type recovery routine or functional recovery routine (FRR) for any needed recovery or cleanup of resources.