gtpi1m14 | System Installation Support Reference |
User exit routine UCCEFCX is called by the dynamic load module (DLM)
startup code before calling the entry point function (if the
exit point named EFCX is active). User exit EFCX is called from an
ISO-C environment. This exit point is in the CLMINT segment of the CIS0
library.
Multifunction user exit linkage is assembled into this exit point.
This user exit is activated by the ZDBUG command (with the START parameter
specified), which calls the UXITC macro with the IUX_VADB function set
on.
General Conditions at Entry
The registers at entry are:
- R8
- Program base of the called program
- R9
- Address of the ECB.
- R11-R15
- See User Exit Routines - Common Entry Conditions.
System Conditions at Entry
- System state
- Problem (see Programming Considerations at Entry, item 1)
- System mask
- Unmasked (see Programming Considerations at Entry, item 1)
- Protect key
- Working storage or zero (0)
- Address Space
- EVM.
Programming Considerations at Entry
- Usually, the system state and system mask are as
stated. However, there can be exceptions if system programs issued a
MONTC macro to get to supervisor state and changed the system mask.
- You activate the TPF Assembler Debugger for VisualAge Client or TPF C
Debugger for VisualAge Client code from this user exit by calling the UXMAC
macro. Program load event detection code (the IUX_VADB UXMAC call) must
be the last exit routine to be called in the exit. The
debugger will not return to this user exit when it determines that
the debugger must receive control. If you do not want the debugger to
trace the program that will be entered, set the CE3_NO_DEBUG indicator in byte
CE3DBCR (page 3 of the ECB) before the debugger is called. The debugger
always sets this indicator off before activating the program.
- See User Exit Routines - Common Programming Considerations for other considerations.
Programming Considerations on Return
See User Exit Routines - Common Return Conditions.
General Conditions on Return
See User Exit Routines - Common Return Conditions.