Error Reporting; Debug Commands - Cisco 520-T1 - Small Business Pro SR Secure Router Software Configuration Manual

Debug Commands

Error Reporting

Because the ROM monitor console download uses the console to perform the data transfer, when an error
occurs during a data transfer, error messages are only displayed on the console once the data transfer is
terminated.
If you have changed the baud rate from the default rate, the error message is followed by a message
telling you to restore the terminal to the baud rate specified in the configuration register.
Debug Commands
Most ROM monitor debugging commands are functional only when Cisco IOS software has crashed or
is halted. If you enter a debugging command and Cisco IOS crash information is not available, you see
the following error message:
"xxx: kernel context state is invalid, can not proceed."
The following are ROM monitor debugging commands:
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Cisco Secure Router 520 Series Software Configuration Guide
C-8
stack or k—Produces a stack trace; for example:
rommon 6> stack
Stack trace:
PC = 0x801111b0
Frame 00: FP = 0x80005ea8
Frame 01: FP = 0x80005eb4
Frame 02: FP = 0x80005f74
Frame 03: FP = 0x80005f9c
Frame 04: FP = 0x80005fac
Frame 05: FP = 0x80005fc4
context—Displays processor context; for example:
rommon 7> context
CPU context of the most recent exception:
PC = 0x801111b0 MSR = 0x00009032
CTR = 0x801065e4 XER = 0xa0006d36
DEC = 0xffffffff TBU = 0xffffffff
R0 = 0x00000000 R1 = 0x80005ea8
R4 = 0x8fab0d76 R5 = 0x80657d00
R8 = 0x00000000 R9 = 0x80570000
R12 = 0x00000080 R13 = 0xffffffff
R16 = 0xffffffff R17 = 0xffffffff
R20 = 0xffffffff R21 = 0xffffffff
R24 = 0xffffffff R25 = 0xffffffff
R28 = 0xffffffff R29 = 0xffffffff
frame—Displays an individual stack frame.
sysret—Displays return information from the last booted system image. This information includes
the reason for terminating the image, a stack dump of up to eight frames, and, if an exception is
involved, the address where the exception occurred; for example:
rommon 8> sysret
System Return Info:
count: 19, reason: user break
pc:0x801111b0, error address: 0x801111b0
Stack Trace:
FP: 0x80005ea8, PC: 0x801111b0
FP: 0x80005eb4, PC: 0x80113694
FP: 0x80005f74, PC: 0x8010eb44
PC = 0x801111b0
PC = 0x80113694
PC = 0x8010eb44
PC = 0x80008118
PC = 0x80008064
PC = 0xfff03d70
CR = 0x53000035
DAR = 0xffffffff
TBL = 0xffffffff
R2 = 0xffffffff
R6 = 0x80570000
R10 = 0x0000954c
R14 = 0xffffffff
R18 = 0xffffffff
R22 = 0xffffffff
R26 = 0xffffffff
R30 = 0xffffffff
Appendix C ROM Monitor
LR = 0x80113694
DSISR = 0xffffffff
IMMR = 0xffffffff
R3 = 0x00000000
R7 = 0x80570000
R11 = 0x00000000
R15 = 0xffffffff
R19 = 0xffffffff
R23 = 0xffffffff
R27 = 0xffffffff
R31 = 0xffffffff
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