FAQ: [#7216] cat /proc/kallsyms on telnet session prints nothing(2012)

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[#7216] cat /proc/kallsyms on telnet session prints nothing

Submitted By: Mingquan Pan

Open Date

2012-07-31 03:08:00     Close Date

2012-08-15 04:45:58

Priority:

Medium     Assignee:

Bob Liu

Status:

Closed     Fixed In Release:

N/A

Found In Release:

N/A     Release:

Category:

N/A     Board:

N/A

Processor:

BF537     Silicon Revision:

Is this bug repeatable?:

Yes     Resolution:

Fixed

Uboot version or rev.:

    Toolchain version or rev.:

ADI-trunk/svn-5764

App binary format:

N/A     

Summary: cat /proc/kallsyms on telnet session prints nothing

Details:

 

cat /proc/kallsyms on telnet session prints nothing now. And after a while press enter would make telnet session exit abnormally.

 

test@uclinux50-bf537-9960-1836:~/work/cruise/checkouts/uclinux-dist/testsuites/serial> telnet 10.100.4.50

Trying 10.100.4.50...

Connected to 10.100.4.50.

Escape character is '^]'.

 

 

BusyBox v1.18.4 (2012-07-31 10:49:34 CST) hush - the humble shell

 

root:/> version

kernel:    Linux release 3.5.0-ADI-2012R1-pre-00800-gd42738a, build #571 Tue Jul 31 16:09:19 CST 2012

toolchain: bfin-uclinux-gcc release gcc version 4.3.5 (ADI-trunk/svn-5764)

user-dist: release svn-10752, build #8271 Tue Jul 31 16:08:43 CST 2012

root:/> cat /proc/kallsyms

Connection closed by foreign host.

test@uclinux50-bf537-9960-1836:~/work/cruise/checkouts/uclinux-dist/testsuites/serial>

 

 

 

 

 

Follow-ups

 

--- Mingquan Pan                                             2012-07-31 04:19:42

On target console, cat proc/kallsyms get kernel panic:

 

cat proc/kallsyms

NULL pointer access

Kernel OOPS in progress

Deferred Exception context

CURRENT PROCESS:

COMM=cat PID=168  CPU=0

TEXT = 0x02b80040-0x02bd4fc0        DATA = 0x02bd4fe0-0x02be9a08

BSS = 0x02be9a08-0x02beb3e0  USER-STACK = 0x02bf4f74

 

return address: [0x000388bc]; contents of:

0x00038890:  0019  0167  e10a  e758  3221  6fa6  e410  0010

0x000388a0:  e121  00d0  e300  b3fe  3228  0c45  182b  6000

0x000388b0:  e14a  0000  e6a8  0011  e10a  0000 [9110] b0e8

0x000388c0:  6001  cc00  c000  b069  0000  9328  e141  0013

 

ADSP-BF537-0.2 500(MHz CCLK) 125(MHz SCLK) (mpu off)

Linux version 3.5.0-ADI-2012R1-pre-00800-gd42738a

(test@uclinux50-bf537-9960-1836) (gcc version 4.3.5 (ADI-trunk/svn-5764) ) #571

Tue Jul 31 16:09:19 CST 2012

 

SEQUENCER STATUS:               Not tainted

SEQSTAT: 00000027  IPEND: 8008  IMASK: ffff  SYSCFG: 0006

  EXCAUSE   : 0x27

Double Fault

Kernel OOPS in progress

Deferred Exception context

CURRENT PROCESS:

COMM=cat PID=168  CPU=0

TEXT = 0x02b80040-0x02bd4fc0        DATA = 0x02bd4fe0-0x02be9a08

BSS = 0x02be9a08-0x02beb3e0  USER-STACK = 0x02bf4f74

 

return address: [0x0003853a]; contents of:

0x00038510:  600e  9851  4348  0c00  1ff2  0c06  1ffa  9a21

0x00038520:  2ff9  0000  04c3  e14c  0000  014f  e10c  0000

0x00038530:  3018  3239  3402  0c44  1003 [0001] 2000  e14a

0x00038540:  0000  e10a  0000  9153  6002  304b  5211  0e08

 

ADSP-BF537-0.2 500(MHz CCLK) 125(MHz SCLK) (mpu off)

Linux version 3.5.0-ADI-2012R1-pre-00800-gd42738a

(test@uclinux50-bf537-9960-1836) (gcc version 4.3.5 (ADI-trunk/svn-5764) ) #571

Tue Jul 31 16:09:19 CST 2012

 

SEQUENCER STATUS:               Not tainted

SEQSTAT: 00060021  IPEND: 8028  IMASK: ffff  SYSCFG: 0006

  EXCAUSE   : 0x21

 

 

U-Boot 2011.09-svn2741 (ADI-2011R1) (Nov 10 2011 - 12:06:38)

 

CPU:   ADSP bf537-0.2 (Detected Rev: 0.2) (bypass boot)

..

 

--- Bob Liu                                                  2012-08-09 22:58:34

fixed,add  --symbol-prefix=_  to  scripts/link-vmlinux.sh

 

--- Mingquan Pan                                             2012-08-15 05:44:39

Fixed, close.

 

 

 

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