z/OS Diagnostic Data Collection and Analysis

12.7. Finding the failing CSECT name in LE

Getting the name of the failing csect (function), or any LE-enabled CSECT can be performed as follows:

1.	Get address (second word) from MCH_PSW.
2.	Select Option 1 (Browse) in IPCS.
3.	Issue command: L xxxxxxxx (where xxxxxxxx is the address).
4.	Issue command F CEE prev.
5.	Back up five bytes to the 47F0xxxx instruction. This is the beginning of the CSECT/function.
6.	Add the value at offset X‘0C’ to the module address.
7.	Go to that location.
8.	Add X‘20’ bytes. This is a two-byte prefixed string (length) with the function name.

Figure 12-3 shows the steps needed to find the failing CSECT/Function.

Figure 12-3. LE diagnostic flow for finding the failing CSECT

12B00B80 47F0F026 01C3C5C5 000000A0 ...