Re: [Xenomai-core] Debugging Xenomai kernel

[zenati <omar.zenati@domain.hid>]

On 07/27/2011 02:12 PM, Jan Kiszka wrote:
> On 2011-07-27 14:01, zenati wrote:
>> On 07/27/2011 11:23 AM, Jan Kiszka wrote:
>>> On 2011-07-26 13:54, zenati wrote:
>>>> Dear,
>>>>
>>>> I'm trying to debug Xenomai kernel with GDB and Qemu.
>>> QEMU in emulation or KVM mode?
>>>
>> I'm using Qemu in emulation mode.
> What's your target arch? x84-64, x86-32, or some ARM or PPC etc.
x86-32
>>>> So, I launch
>>>> Xenomai in Qemu and make it waiting for GDB. Then I start GDB and
>>>> connect them to Qemu, make breakpoint at the desired function to debug
>>>> and start Xenomai. If the function belongs to the linux kernel, the
>>>> execution stop at the breakpoint. But, if the function belongs to the
>>>> Xenomai nucleus, GDB recognize the breakpoint at the execution but don't
>>>> stop.
>>> Is Xenomai built as module or part of the main kernel image? The latter
>>> is simpler to handle as you don't have to deal with modules as symbol
>>> sources, find out their addresses, and load them at the right location.
>>>
>> Xenomai is built as a part of the main kernel.
> OK. Check during runtime of the guest if the disassembly at the desired
> breakpoint address matches the compiled code. Maybe there is some
> accidental discrepancy.
The breakpoints match correctly the compiled code. Anyway, it must stop 
at the breakpoint. No?
> Jan
>