Other environmental factors in recovery

As mentioned previously, the other environmental factors to be concerned about in a recovery environment are:

• Authorization: problem state or supervisor state, PSW key, and PKM
• SDWA storage key
• Dispatchable unit mode
• Cross memory mode
• AMODE
• ASC mode
• Interrupt status
• DU-AL
• Locks
• Program mask
• Condition of the linkage stack
• AX
• EAX

These environmental factors differ depending on whether the routine is:

• An ESTAE-type recovery routine
• A retry routine getting control from an ESTAE-type recovery routine
• An FRR
• A retry routine getting control from an FRR.