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

[#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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