Citando Frank Rowand <frowand.l...@gmail.com>:
> On 10/2/2014 4:15 AM, joaoandrefe...@sapo.pt wrote:
>> Citando Frank Rowand <frowand.l...@gmail.com>:
>>
>>> On 10/1/2014 3:57 AM, joaoandrefe...@sapo.pt wrote:
>>>> Hello all,
>>>>
>>>> I'm trying to use KGDB on a target machine + GDB on the host,
>>>> connected via ethernet. Regarding KGDB, I'm having problems
>>>> because I can't boot the target machine into KGDB. When I boot
>>>> it, it boots normally, i. e. it ends up entering the OS. What
>>>> have I done so far:
>>>>
>>>> I have downloaded kernel 2.6.32.4 from www.kernel.org and
>>>> prepared the compilation with menuconfig, enabling the KGDB
>>>> otions. After that, I've compiled the kernel using the "sudo make
>>>> && sudo make modules && sudo make modules_install && sudo make
>>>> install" commands. After that, If I boot the newly-compiled
>>>> kernel, KGDB won't start, i. e., the kernel boots till the end as
>>>> usual, and enters the OS, so I don't see the expected "Waiting
>>>> for connection from remote gdb..." message.
>>>>
>>>> 1. My KGDB .config debugging symbols:
>>>>
>>>> [...] CONFIG_HAVE_ARCH_KGDB=y CONFIG_KGDB=y
>>>> CONFIG_KGDB_SERIAL_CONSOLE=y CONFIG_KGDB_TESTS=y #
>>>> CONFIG_KGDB_TESTS_ON_BOOT is not set [...]
>>>>
>>>> 2. My grub.conf (remember I'm planning to use an ethernet
>>>> connection):
>>>>
>>>> [...] title CentOS (2.6.32.4) root (hd0,0) kernel
>>>> /vmlinuz-2.6.32.4 ro root=/dev/mapper/vg_centos6-lv_root
>>>> rd_NO_LUKS LANG=en_US.UTF-8 rd_LVM_LV=vg_centos6/lv_swap
>>>> rd_NO_MD SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc
>>>> KEYTABLE=pt-latin1 rd_LVM_LV=vg_centos6/lv_root rd_NO_DM rhgb
>>>> quiet crashkernel=auto kgdbwait kgdbcon
>>>> kgdboe=@10.3.3.149/,@10.3.3.32 initrd /initramfs-2.6.32.4.img
>>>> [...]
>>>>
>>>> Anybody has a hint on why can't I make KGDB to get working? If
>>>> someone can help me, I'd deeply grateful.
>>>
>>> Do you have kgdboe support in your kernel source? I'm guessing
>>> not.
>>>
>>> -Frank
>>
>> Hello again, Frank,
>>
>> The problem here was before using kgdboe. It had to do with compiling
>> the kernel. Yesterday, I've tried the "CentOS way" (instructions
>> here: http://www.howtoforge.com/kernel_compilation_centos), and
>> finally KGDB is booting. Regarding kgdboe, I thought this kernel
>> supported it, but currently I can't confirm or dismiss that. Do you
>> know if there is an easy way to clarify if my kernel supports kgdboe?
>
> Search for the string "kgdboe" in the kernel source tree.
>
>> Meanwhile, I'm also trying to connect through serial port.
>
> Just to head off the next question, if your target board has only one
> serial port, you will want to use an agent-proxy, such as "kdmx" or
> "agent-proxy". See http://elinux.org/Kgdb for info on where to
> get those.
>
> -Frank
You're right, running "find /usr/src/linux -name kgdboe" returns
nothing, while "grep -r -i "kgdboe" /usr/src/linux" only returns
/usr/src/linux/arch/frv/defconfig:# CONFIG_KGDBOE is not set
/usr/src/linux/drivers/serial/kgdboc.c: * Based on the same principle
as kgdboe using the NETPOLL api, this
So, how can I have kgdboe support? I'll have to apply a patch to my
kernel, right? How can I do that? (meanwhile, I'll check the
agent-proxy thing, since both the host and target motherboards only
have one serial port each)
Thanks for all!
João
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