Technical data

System Dump Analyzer

SHOW CALL_FRAME

Figure SDA–5 Call Frame

ZK−6564−GE

Condition Handler Address

SPA S 0 Mask <11:0> Saved PSW <15:5> 0

Saved AP

Saved FP

Saved PC

Saved R0

Saved R11

:(FP)

The SHOW CALL_FRAME command follows this listing with an indication of

how many bytes were used to align the call frame to a longword boundary.

For call frames generated by a CALLS instruction, the SHOW CALL_FRAME

instruction displays the argument list to the call frame in three columns

containing the virtual address of each item, its contents, and its symbolic

representation.

All valid procedure call frames begin on a longword boundary. If the speciﬁed

address expression does not begin on a longword boundary, the call frame is

invalid and SDA displays the following message:

Invalid Call Frame: Start Address Not On Longword Boundary

If you attempt to format an address that is not a call frame or is an invalid call

frame (that is, bit 28 of the second longword is not 0), SDA displays the following

message:

Invalid Call Frame: Bit 28 is Set in "Mask-PSW" Longword

When using the SHOW CALL_FRAME/NEXT_FP command to follow a chain of

call frames, SDA signals the end of the chain by this message:

%SDA-E-NOTINPHYS, 00000000 : not in physical memory

This message indicates that the saved FP in the previous call frame has a zero

value.

SDA–83