[#4837] kgdb backtrace stop on bf518f and bf526 ezbrd

Submitted By: Mingquan Pan

Open Date

2009-01-22 05:00:48 Close Date

2010-06-11 04:20:42

Priority:

Medium Assignee:

Sonic Zhang

Status:

Closed Fixed In Release:

N/A

Found In Release:

2009R1-RC6 Release:

Category:

N/A Board:

N/A

Processor:

BF518 Silicon Revision:

Is this bug repeatable?:

Yes Resolution:

Not reproducible

Uboot version or rev.:

Toolchain version or rev.:

Jan 17,2009

App binary format:

N/A

Summary: kgdb backtrace stop on bf518f and bf526 ezbrd

Details:

kgdb backtrace stop on bf518f and bf526 ezbrd.

## Booting kernel from Legacy Image at 02000000 ...

Image Name: Linux-2.6.28-ADI-2009R1-pre-svn6

Created: 2009-01-19 13:57:11 UTC

Image Type: Blackfin Linux Kernel Image (gzip compressed)

Data Size: 3411197 Bytes = 3.3 MB

Load Address: 00001000

Entry Point: 001886cc

Verifying Checksum ... OK

Uncompressing Kernel Image ... OK

Starting Kernel at = 001886cc

Linux version 2.6.28-ADI-2009R1-pre-svn6027 (test@51x) (gcc version 4.1.2 (ADI svn)) #6 Mon Jan 19 21:57:04 CST 2009

Board Memory: 64MB

Kernel Managed Memory: 64MB

Memory map:

fixedcode = 0x00000400-0x00000490

text = 0x00001000-0x00102aa0

rodata = 0x00102aa0-0x00157350

bss = 0x00157350-0x0016b88c

data = 0x0016b88c-0x0017c000

stack = 0x0017a000-0x0017c000

init = 0x0017c000-0x00632000

available = 0x00632000-0x03eff000

DMA Zone = 0x03f00000-0x04000000

Hardware Trace Active and Enabled

Boot Mode: 3

Compiled for ADSP-BF518 Rev 0.0

Blackfin Linux support by blackfin.uclinux.org/

Processor Speed: 500 MHz core clock and 125 MHz System Clock

NOMPU: setting up cplb tables

Instruction Cache Enabled for CPU0

Data Cache Enabled for CPU0 (write-through)

Built 1 zonelists in Zone order, mobility grouping off. Total pages: 16001

Kernel command line: console=ttyBF0,57600 kgdboe=@10.100.4.50/,@10.100.4.174/

kgdboe: local port 6443

kgdboe: local IP 10.100.4.50

kgdboe: interface eth0

kgdboe: remote port 6442

kgdboe: remote IP 10.100.4.174

kgdboe: remote ethernet address ff:ff:ff:ff:ff:ff

Configuring Blackfin Priority Driven Interrupts

PID hash table entries: 256 (order: 8, 1024 bytes)

console [ttyBF0] enabled

Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)

Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)

Memory available: 57584k/65536k RAM, (4824k init code, 1030k kernel code, 486k data, 1024k dma, 584k reserved)

Calibrating delay loop... 995.32 BogoMIPS (lpj=1990656)

Security Framework initialized

Mount-cache hash table entries: 512

Blackfin Scratchpad data SRAM: 4 KB

Blackfin L1 Data A SRAM: 16 KB (15 KB free)

Blackfin L1 Data B SRAM: 16 KB (16 KB free)

Blackfin L1 Instruction SRAM: 48 KB (42 KB free)

PDA for CPU0 reserved at 00158344

net_namespace: 288 bytes

NET: Registered protocol family 16

Blackfin GPIO Controller

Blackfin DMA Controller

ezbrd_init(): registering device resources

NET: Registered protocol family 2

IP route cache hash table entries: 1024 (order: 0, 4096 bytes)

TCP established hash table entries: 2048 (order: 2, 16384 bytes)

TCP bind hash table entries: 2048 (order: 1, 8192 bytes)

TCP: Hash tables configured (established 2048 bind 2048)

TCP reno registered

NET: Registered protocol family 1

msgmni has been set to 112

io scheduler noop registered (default)

Serial: Blackfin serial driver

bfin-uart.1: ttyBF0 at MMIO 0xffc00400 (irq = 29) is a BFIN-UART

brd: module loaded

bfin_mac_mdio: probed

bfin_mac: attached PHY driver [Generic PHY] (mii_bus:phy_addr=0:01, irq=-1, mdc_clk=2500000Hz(mdc_div=24)@sclk=125MHz)

bfin_mac bfin_mac.0: Blackfin on-chip Ethernet MAC driver, Version 1.1

kgdboe: local port 6443

kgdboe: local IP 10.100.4.50

kgdboe: interface eth0

kgdboe: remote port 6442

kgdboe: remote IP 10.100.4.174

kgdboe: remote ethernet address ff:ff:ff:ff:ff:ff

kgdboe: device eth0 not up yet, forcing it

dma_alloc_init: dma_page @ 0x03a31000 - 256 pages at 0x03f00000

kgdboe: carrier detect appears untrustworthy, waiting 4 seconds

PHY: 0:01 - Link is Up - 100/Full

kgdb: Registered I/O driver kgdboe.

kgdboe: debugging over ethernet enabled

rtc-bfin rtc-bfin: rtc core: registered rtc-bfin as rtc0

i2c /dev entries driver

i2c-bfin-twi i2c-bfin-twi.0: Blackfin BF5xx on-chip I2C TWI Contoller, regs_base@ffc01400

TCP cubic registered

NET: Registered protocol family 17

rtc-bfin rtc-bfin: setting system clock to 2004-06-04 00:51:23 UTC (1086310283)

Freeing unused kernel memory: 4824k freed

_____________________________________

a8888b. / Welcome to the uClinux distribution \

d888888b. / _ _ \

8P"YP"Y88 / | | |_| __ __ (TM) |

8|o||o|88 _____/ | | _ ____ _ _ \ \/ / |

8' .88 \ | | | | _ \| | | | \ / |

8`._.' Y8. \ | |__ | | | | | |_| | / \ |

d/ `8b. \ \____||_|_| |_|\____|/_/\_\ |

dP . Y8b. \ For embedded processors including |

d8:' " `::88b \ the Analog Devices Blackfin /

d8" 'Y88b \___________________________________/

:8P ' :888

8a. : _a88P For further information, check out:

._/"Yaa_: .| 88P| - blackfin.uclinux.org/

\ YP" `| 8P `. - docs.blackfin.uclinux.org/

/ \.___.d| .' - www.uclinux.org/

`--..__)8888P`._.' jgs/a:f - www.analog.com/blackfin

Have a lot of fun...

BusyBox v1.13.2 (2009-01-19 19:13:02 CST) built-in shell (msh)

Enter 'help' for a list of built-in commands.

root:/>

#### Debugging is through ethernet port.

************** STEP 3: Start KGDB TEST

ifconfig eth0 10.100.4.50

root:/> spawn bfin-uclinux-gdb /home/test/work/cruise/checkouts/uclinux-dist/linux-2.6.x/vmlinux

GNU gdb 6.6

GDB is free software, covered by the GNU General Public License, and you are

welcome to change it and/or distribute copies of it under certain conditions.

Type "show copying" to see the conditions.

There is absolutely no warranty for GDB. Type "show warranty" for details.

This GDB was configured as "--host=i686-pc-linux-gnu --target=bfin-uclinux"...

(gdb)

Case 1 ...PASS

target remote udp:10.100.4.50:6443

warning: The remote protocol may be unreliable over UDP.

Some events may be lost, rendering further debugging impossible.

Remote debugging using udp:10.100.4.50:6443

kgdb_breakpoint () at kernel/kgdb.c:1722

Case 2 ...PASS

1722 atomic_set(&kgdb_setting_breakpoint, 0);

(gdb) break kgdb_test

Breakpoint 1 at 0x872a: file arch/blackfin/kernel/kgdb_test.c, line 54.

Case 3 ...PASS

(gdb) c

Continuing.

Case 4 ...PASS

root:/> [New Thread 145]

[Switching to Thread 145]

Breakpoint 1, kgdb_test (name=0x877c "J谩聽每\n谩\024\003b", len=1062572, count=12, z=85) at arch/blackfin/kernel/kgdb_test.c:54

54 printk(KERN_DEBUG "kgdb name(%d): %s, %d, %d\n", len, name, count, z);

Case 5 ...PASS

(gdb) hbreak 56

Hardware assisted breakpoint 2 at 0x8750: file arch/blackfin/kernel/kgdb_test.c, line 56.

(gdb)

Case 6 ...PASS

info b

Num Type Disp Enb Address What

1 breakpoint keep y 0x0000872a in kgdb_test at arch/blackfin/kernel/kgdb_test.c:54

breakpoint already hit 1 time

2 hw breakpoint keep y 0x00008750 in kgdb_test at arch/blackfin/kernel/kgdb_test.c:56

Case 7 ...PASS

(gdb) list

49 #endif

52 int kgdb_test(char *name, int len, int count, int z)

53 {

54 printk(KERN_DEBUG "kgdb name(%d): %s, %d, %d\n", len, name, count, z);

55 count = z;

56 return count;

57 }

(gdb)

Case 8 ...PASS

#0 kgdb_test (name=0x877c "J谩聽每\n谩\024\003b", len=1062572, count=12, z=85) at arch/blackfin/kernel/kgdb_test.c:54

Case 9 ...PASS

#1 0x00001000 in ?? ()

Backtrace stopped: previous frame inner to this frame (corrupt stack?)

(gdb) c

Continuing.

cat /proc/kgdbtest

spawn /bin/sh

51x:~/work/cruise/checkouts/uclinux-dist/testsuites/kgdb> ps aux | grep bfin-uclinux-gdb

test 4698 0.9 2.5 30784 25812 pts/8 Ss+ 21:58 0:00 bfin-uclinux-gdb /home/test/work/cruise/checkouts/uclinux-dist/linux-2.6.x/vmlinux

test 4719 0.0 0.0 3064 712 pts/9 R+ 21:58 0:00 grep bfin-uclinux-gdb

51x:~/work/cruise/checkouts/uclinux-dist/testsuites/kgdb> kill -9 `pidof bfin-uclinux-gdb`

51x:~/work/cruise/checkouts/uclinux-dist/testsuites/kgdb>

Case 11 ...FAIL

Follow-ups

--- Sonic Zhang 2009-02-05 03:47:32

Can't replicate.

Case 8 ...PASS

#0 kgdb_test (name=0x877c "Já ÿ\ná\024\003b", len=1102052,

count=12, z=85)

at arch/blackfin/kernel/kgdb_test.c:54

Case 9 ...PASS

#1 0x00001000 in ?? ()

Backtrace stopped: previous frame inner to this frame (corrupt stack?)

(gdb) c

Continuing.

cat /proc/kgdbTrying 100/FULL

test

kgdb name(12): hello world!, 85, 16

Case 10 ...PASS

Breakpoint 2, kgdb_test (name=0x877c "Já ÿ\ná\024\003b",

len=1102052, count=12, z=16)

at arch/blackfin/kernel/kgdb_test.c:56

56 return count;

Case 11 ...PASS

(gdb) print z

$1 = 16

Case 12 ...PASS

(gdb) c

Continuing.

L1(before change) : data variable addr = 0xff800000, data value is 0

L1 : code function addr = 0xffa00314

L1(after change) : data variable addr = 0xff800000, data value is 10

Case 12 ...PASS

[New Thread 223]

[Switching to Thread 223]

Breakpoint 1, kgdb_test (name=0x877c "Já ÿ\ná\024\003b",

len=1102052, count=12, z=85)

at arch/blackfin/kernel/kgdb_test.c:54

54 printk(KERN_DEBUG "kgdb name(%d): %s, %d, %d\n", len,

name, count, z);

(gdb) hbreak kgdb_l1_test

Hardware assisted breakpoint 3 at 0xffa00318: file

arch/blackfin/kernel/kgdb_test.c, line 29.

Case 13 ...PASS

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[#4837] kgdb backtrace stop on bf518f and bf526 ezbrd