[#4880] kgdb fails to continue after setting breakpoint on bf561-ezkit kernel with smp patch

Submitted By: Mingquan Pan

Open Date

2009-02-10 03:38:00 Close Date

2010-06-11 04:42:00

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:

ALL Silicon Revision:

Is this bug repeatable?:

Yes Resolution:

Fixed

Uboot version or rev.:

Toolchain version or rev.:

4.1 of Jan 16

App binary format:

N/A

Summary: kgdb fails to continue after setting breakpoint on bf561-ezkit kernel with smp patch

Details:

kgdb fails to continue after setting breakpoint on bf561-ezkit kernel with smp patch now.

## Booting image at 02000000 ...

Image Name: Linux-2.6.28.3-ADI-2009R1-pre-sv

Image Type: Blackfin Linux Kernel Image (gzip compressed)

Data Size: 3677582 Bytes = 3.5 MB

Load Address: 00001000

Entry Point: 0019b6dc

Verifying Checksum ... OK

Uncompressing Kernel Image ... OK

Starting Kernel at = 19b6dc

Linux version 2.6.28.3-ADI-2009R1-pre-svn6083 (test@my-local-machine) (gcc version 4.1.2 (ADI svn)) #19 SMP Tue Feb 10 16:02:59 CST 2009

Warning: limiting memory to 56MB due to hardware anomaly 05000263

Board Memory: 64MB

Kernel Managed Memory: 64MB

Memory map:

fixedcode = 0x00000400-0x00000490

text = 0x00001000-0x001153d0

rodata = 0x001153e0-0x00164f1c

bss = 0x00164f20-0x0017be70

data = 0x0017be80-0x0018e000

stack = 0x0018c000-0x0018e000

init = 0x0018e000-0x006f4000

available = 0x006f4000-0x037ff000

DMA Zone = 0x03f00000-0x04000000

Hardware Trace Active and Enabled

Boot Mode: 0

Compiled for ADSP-BF561 Rev 0.3

Blackfin Linux support by blackfin.uclinux.org/

Processor Speed: 600 MHz core clock and 100 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: 14223

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: 49612k/65536k RAM, (5528k init code, 1104k kernel code, 484k data, 1024k dma, 7784k reserved)

Calibrating delay loop... 1191.93 BogoMIPS (lpj=2383872)

Security Framework initialized

Mount-cache hash table entries: 512

CoreB bootstrap code to SRAM ff600000 via DMA.

Booting Core B.

Instruction Cache Enabled for CPU1

Data Cache Enabled for CPU1 (write-through)

PDA for CPU1 reserved at 001662f8

Calibrating delay loop... 1175.55 BogoMIPS (lpj=2351104)

Brought up 2 CPUs

SMP: Total of 2 processors activated (1175.55 BogoMIPS).

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: 16 KB (15 KB free)

Blackfin L2 SRAM: 128 KB (127 KB free)

PDA for CPU0 reserved at 001662a4

net_namespace: 296 bytes

NET: Registered protocol family 16

Blackfin GPIO Controller

Blackfin DMA Controller

ezkit_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: 2, 16384 bytes)

TCP: Hash tables configured (established 2048 bind 2048)

TCP reno registered

NET: Registered protocol family 1

msgmni has been set to 96

io scheduler noop registered

io scheduler anticipatory registered (default)

io scheduler cfq registered

Serial: Blackfin serial driver

bfin-uart.1: ttyBF0 at MMIO 0xffc00400 (irq = 35) is a BFIN-UART

brd: module loaded

smc91x.c: v1.1, sep 22 2004 by Nicolas Pitre <nico@cam.org>

eth0: SMC91C11xFD (rev 1) at 2c010300 IRQ 82 [nowait]

eth0: Ethernet addr: 00:e0:22:fe:b2:01

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

eth0: link down

eth0: link up, 100Mbps, full-duplex, lpa 0x45E1

kgdb: Registered I/O driver kgdboe.

kgdboe: debugging over ethernet enabled

bfin-spi bfin-spi.0: Blackfin on-chip SPI Controller Driver, Version 1.0, regs_base@ffc00500, dma channel@16

TCP cubic registered

NET: Registered protocol family 17

Freeing unused kernel memory: 5528k freed

dma_alloc_init: dma_page @ 0x006f1000 - 256 pages at 0x03f00000

_____________________________________

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 (2009-02-10 14:15:50 CST) built-in shell (msh)

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

root:/>

root:/> ifconfig

eth0 Link encap:Ethernet HWaddr 00:E0:22:FE:B2:01

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:0 errors:0 dropped:0 overruns:0 frame:0

TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

Interrupt:82 Base address:0x300 DMA chan:ff

lo Link encap:Local Loopback

inet addr:127.0.0.1 Mask:255.0.0.0

UP LOOPBACK RUNNING MTU:16436 Metric:1

RX packets:0 errors:0 dropped:0 overruns:0 frame:0

TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

root:/> ifconfig eth0 10.100.4.50

root:/> init: /bin/watchdogd respawning too fast

root:/> ifconfig

eth0 Link encap:Ethernet HWaddr 00:E0:22:FE:B2:01

inet addr:10.100.4.50 Bcast:10.255.255.255 Mask:255.0.0.0

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:0 errors:0 dropped:0 overruns:0 frame:0

TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

Interrupt:82 Base address:0x300 DMA chan:ff

lo Link encap:Local Loopback

inet addr:127.0.0.1 Mask:255.0.0.0

UP LOOPBACK RUNNING MTU:16436 Metric:1

RX packets:0 errors:0 dropped:0 overruns:0 frame:0

TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

On host machine:

test@my-local-machine:~/work/cruise/checkouts/uclinux-dist> 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) 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

1722 atomic_set(&kgdb_setting_breakpoint, 0);

(gdb) break kgdb_test

Breakpoint 1 at 0x9fb2: file arch/blackfin/kernel/kgdb_test.c, line 54.

(gdb) thread

[Current thread is 0 (Thread -3)]

(gdb) c

Continuing.

but the target machine still stucks and no response.

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[#4880] kgdb fails to continue after setting breakpoint on bf561-ezkit kernel with smp patch