FAQ: [#6859] Fail to test KGDB through uart port in trunk after kernel is upgraded to 3.1.0(2011)

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[#6859] Fail to test KGDB through uart port in trunk after kernel is upgraded to 3.1.0

Submitted By: Vivi Li

Open Date

2011-10-28 05:54:21     Close Date

2012-01-17 04:16:23

Priority:

Medium     Assignee:

Sonic Zhang

Status:

Closed     Fixed In Release:

N/A

Found In Release:

N/A     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.:

gcc4.3-2011R1-RC2

App binary format:

N/A     

Summary: Fail to test KGDB through uart port in trunk after kernel is upgraded to 3.1.0

Details:

 

Fail to test KGDB through uart port in trunk after kernel is upgraded from 3.0.0 to 3.1.0.

 

Last passed version:

--

kernel:    Linux release 3.0.0-ADI-2011R1-pre-svn10099, build #36 Wed Oct 26 16:50:57 CST 2011

toolchain: bfin-uclinux-gcc release gcc version 4.3.5 (ADI-2011R1-RC2)

user-dist: release svn-10452, build #490 Wed Oct 26 16:50:21 CST 2011

--

 

First failed version:

--

kernel:    Linux release 3.1.0-ADI-2012R1-pre-svn10106, build #42 Thu Oct 27 17:44:00 CST 2011

toolchain: bfin-uclinux-gcc release gcc version 4.3.5 (ADI-2011R1-RC2)

user-dist: release svn-10454, build #578 Thu Oct 27 17:43:23 CST 2011

--

 

Bellow is the error log:

--

Starting Kernel at = 001c7dd0

console [ttyBF0] enabled, bootconsole disabled

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

pid_max: default: 32768 minimum: 301

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 (34 KB free)

NET: Registered protocol family 16

Blackfin DMA Controller

stamp_init(): registering device resources

bio: create slab <bio-0> at 0

bfin-spi bfin-spi.0: Blackfin on-chip SPI Controller Driver, Version 1.0, regs@ffc00500, dma channel@7

Switching to clocksource bfin_cs_cycles

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

UDP hash table entries: 256 (order: 0, 4096 bytes)

UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)

NET: Registered protocol family 1

debug-mmrs: setting up Blackfin MMR debugfs

msgmni has been set to 93

io scheduler noop registered (default)

bfin-uart: Blackfin serial driver

bfin-uart.0: ttyBF0 at MMIO 0xffc00400 (irq = 18) is a BFIN-UART

bfin-uart.1: ttyBF1 at MMIO 0xffc02000 (irq = 20) is a BFIN-UART

kgdb: Registered I/O driver kgdboc.

brd: module loaded

bfin_mii_bus: probed

bfin_mac: attached PHY driver [SMSC LAN83C185] (mii_bus:phy_addr=0:01, irq=-1, mdc_clk=2500000Hz(mdc_div=24)@sclk=125MHz)

bfin_mac bfin_mac.0: eth0: Blackfin on-chip Ethernet MAC driver, Version 1.1

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

TCP cubic registered

NET: Registered protocol family 17

rtc-bfin rtc-bfin: setting system clock to 1970-08-11 05:21:47 UTC (19200107)

Freeing unused kernel memory: 7312k 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"  <80>      'Y88b        \___________________________________/

  :8P    '      :888

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

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

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

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

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

 

Have a lot of fun...

 

 

BusyBox v1.18.4 (2011-10-27 06:57:48 CST) hush - the humble shell

 

root:/> ^[[6nversion

kernel:    Linux release 3.1.0-ADI-2012R1-pre-svn10106, build #42 Thu Oct 27 17:44:00 CST 2011

toolchain: bfin-uclinux-gcc release gcc version 4.3.5 (ADI-2011R1-RC2)

user-dist: release svn-10454, build #578 Thu Oct 27 17:43:23 CST 2011

root:/> successful boot attempt

************** STEP 3: Start KGDB TEST (uart)

 

^[[6nifconfig eth0 10.100.4.50

root:/> ^[[6nPHY: 0:01 - Link is Up - 100/Full

?SysRq : DEBUG

Entering KGDB

Prepare KGDB through uart port debug!spawn bfin-uclinux-gdb /home/test/work/cruise/checkouts/uclinux-dist/linux-2.6.x/vmlinux

^[[?1034hGNU gdb 6.6

Copyright (C) 2006 Free Software Foundation, Inc.

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

 

Case 1 ...PASS

set remotebaud 57600

(gdb)

Case 2 ...PASS

 

Case 2 ...PASS

target remote /dev/ttyUSB0

Remote debugging using /dev/ttyUSB0

 

Case 2 ...PASS

 

Case 2 ...PASS

kgdb_breakpoint () at kernel/debug/debug_core.c:993

993             wmb(); /* Sync point after breakpoint */

(gdb) break kgdb_test

Breakpoint 1 at 0x7f16: file arch/blackfin/kernel/kgdb_test.c, line 54.

(gdb)

Case 3 ...PASS

 

Case 3 ...PASS

c

Continuing.

 

Case 4 ...PASS

 

Case 4 ...PASS

 

sh: can't execute '?': No such file or directory

root:/> ^[[6n[New Thread 172]

[Switching to Thread 172]

 

Breakpoint 1, kgdb_test (name=0x165538 "hello world!", len=12, count=85, z=16)

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

54      {

(gdb)

Case 5 ...PASS

 

Case 5 ...PASS

hbreak 59

Hardware assisted breakpoint 2 at 0x7f40: file arch/blackfin/kernel/kgdb_test.c, line 59.

(gdb)

Case 6 ...PASS

 

Case 6 ...PASS

info b

Num Type           Disp Enb Address    What

1   breakpoint     keep y   0x00007f16 in kgdb_test

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

        breakpoint already hit 1 time

2   hw breakpoint  keep y   0x00007f40 in kgdb_test_proc_read

                                       at arch/blackfin/kernel/kgdb_test.c:59

(gdb)

Case 7 ...PASS

 

Case 7 ...PASS

list

49      }

50

51      #endif

52

53      noinline int kgdb_test(char *name, int len, int count, int z)

54      {

55              pr_alert("kgdb name(%d): %s, %d, %d\n", len, name, count, z);

56              count = z;

57              return count;

58      }

(gdb)

Case 8 ...PASS

 

Case 8 ...PASS

bt

#0  kgdb_test (name=0x165538 "hello world!", len=12, count=85, z=16)

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

 

Case 9 ...PASS

 

Case 9 ...PASS

#1  0x00007f60 in kgdb_test_proc_read (file=<value optimized out>,

    buf=<value optimized out>, count=<value optimized out>, ppos=0x2079eec)

    at arch/blackfin/kernel/kgdb_test.c:64

#2  0x0007d540 in proc_reg_read (file=0x248c220,

    buf=0xc <Address 0xc out of bounds>, count=85, ppos=0x2079eec)

    at fs/proc/inode.c:178

#3  0x00051c7a in vfs_read (file=0x248c220, buf=0x2bf3e88 "",

    count=<value optimized out>, pos=0x2079eec) at fs/read_write.c:363

#4  0x00051d90 in sys_read (fd=<value optimized out>, buf=0x2bf3e88 "",

    count=4096) at fs/read_write.c:453

#5  0xffa009ee in system_call () at include/linux/thread_info.h:83

(gdb) c

Continuing.

spawn /bin/sh

uclinux50-bf537-9960-1836:~/work/cruise/checkouts/uclinux-dist/testsuites/kgdb>  ps aux | grep bfin-uclinux-gdb

test     10049  0.9  1.5  38640 32232 pts/3    Ss+  17:45   0:00 bfin-uclinux-gdb /home/test/work/cruise/checkouts/uclinux-dist/linux-2.6.x/vmlinux

test     10060  0.0  0.0   3592   732 pts/4    S+   17:45   0:00 grep bfin-uclinux-gdb

uclinux50-bf537-9960-1836:~/work/cruise/checkouts/uclinux-dist/testsuites/kgdb>  kill -9 `pidof  bfin-uclinux-gdb`

uclinux50-bf537-9960-1836:~/work/cruise/checkouts/uclinux-dist/testsuites/kgdb>

--

 

Follow-ups

 

--- Sonic Zhang                                              2012-01-12 01:28:21

Fixed. move 2nd hb one line up in testcase.

 

--- Vivi Li                                                  2012-01-17 04:45:06

OK now.

Close it.

 

 

 

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File Name     File Type     File Size     Posted By

config.linux.kgdb_uart    application/octet-stream    42792    Vivi Li

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