64-bit E32 parameter list
In 64-bit general register 1, DFSORT places the address of a parameter list that contains the file increment, the record address and the user address constant. The list is three doublewords long and begins on a doubleword boundary. The format of the parameter list is:
64-bit E32 User Exit Parameter List
Location
|
Contents | Description |
|---|---|---|
| Bytes 1 through 8 | X'00000000' | Increment of next file to be used for input |
| Bytes 9 through 16 | Address of next input record | |
| Bytes 17 through 24 | X'00000000' | User exit address constant |
DFSORT provides a 144-byte Format 4 save area pointed to by 64-bit register 13 in which the exit can save the 64-bit registers.
The E32 should expect and use 64-bit addresses.
Before returning control to DFSORT, you must:
- Place the address of the next input record from the requested input file in the second doubleword of the parameter list.
- Put the return code in 32-bit register 15.
The DFSORT target library, SICEUSER, contains a mapping macro called ICEPL64, which provides a separate Assembler DSECT for the E32 64-bit parameter list.