Debug Manual

Debug Commands
Debug Manual—421921-003
4-50
FREEZE Command
•
Two possible uses for this command are finding data structures with particular
values and finding code that has moved slightly because of a minor change.
If you omit value and mask, the FNL command uses the value and mask specified
by the previous FNL command but starts searching at the newly specified address.
•
If you omit address, value, and mask, the FNL command uses the value and
mask specified by the previous FNL command and starts searching at the address
where the previous FNL command terminated.
Examples
The following shows the search for a 32-bit word starting with string 45. The mask
indicates that we are to ignore the contents of the lower 16 bits of the 32-bit word as
well as the lower 16 bits of our search pattern.
050,03,00272-fnl q, '45xx' & 0xffff0000
0008002C: 0x34353637
For more FNL Command examples, see Appendix F, Sample Debug Sessions.
FREEZE Command
The FREEZE command disables the processor and asserts a freeze on other
processors that have freeze enabled. The form of the FREEZE command is:
Considerations
•
The FREEZE command is allowed only if you are debugging in privileged mode as
described under the PRV command.
•
Once a processor is frozen, a service provider can use the service processor (SP)
to examine the current processor and another frozen processor.
Example
245,02,00033-FREEZE ! Freezes the current processor, 02 in this example,
! and asserts a freeze on other processors.
FREEZE