On 22/10/2020 13:04, Jan Kiszka wrote:
> On 22.10.20 13:01, Ralf Ramsauer wrote:
>> Hi,
>>
>> On 10/22/20 12:09 PM, Andrea Bastoni wrote:
>>> Hi,
>>>
>>> On 20/10/2020 12:19, Jari Ronkainen wrote:
>>>> I noticed that dmesg gives me
>>>>
>>>> jailhouse: not as system configuration
>>>
>>> I'm hitting likely the same with Ubuntu 20.04, but not under Debian testing.
>>>
>>> It seems that the .note.gnu.property section is interfering with objcpy and
>>> causes the "JHSYST" identification to be removed from the .cell.
>>>
>>> Removing the section while copying the .o fixes the issue:
>>>
>>> objcopy --version
>>> GNU objcopy (GNU Binutils for Ubuntu) 2.34
>>>
>>> readelf -a jailhouse/configs/x86/qemu-x86.o
>>> ...
>>> Displaying notes found in: .note.gnu.property
>>> Owner Data size Description
>>> GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
>>> Properties: x86 feature: IBT, SHSTK
>>>
>>> hexdump -C jailhouse/configs/x86/qemu-x86.cell
>>> 00000000 04 00 00 00 10 00 00 00 05 00 00 00 47 4e 55 00
>>> |............GNU.|
>>
>> And the Gnu comes around and drops its own magic cowpat. ;-)
>>
>
> Hehe :)
>
>> Jan, maybe it's time to use a linker script for configs? This should
>> avoid such errors in the future. I think we have already seen something
>> similar in the past.
>
> I think it's rather time to make use of pyjailhouse, define a simple
> yaml equivalent of the C-based config format, and generate them without
> any C toolchain. I just received (valid) complaints about all that
> fragile num_whatever_elements and indexes again.
Let me Cc Andrej, he's into the config stuff. What do you exactly
envision? I guess you would then also replace all configs with yaml
equivalents?
Makes it really hard to debug if we have a bug in our generator, as we
only have the raw binary. (Not saying that we don't see the same issues
with the GNU toolchain)
I'd at least like to have something like a 'jailhouse config dump' that
creates a yaml from a given .cell file. This could also be used for the
initial conversion of our C configs.
Ralf
>
> Jan
>
>>
>>>
>>>
>>> objcopy -O binary --remove-section=.note.gnu.property
>>> jailhouse/configs/x86/qemu-x86.o jailhouse/configs/x86/qemu-x86.cell
>>>
>>> 00000000 4a 48 53 59 53 54 0d 00 01 00 00 00 00 00 00 3a
>>> |JHSYST.........:|
>>
>> This reminds me that I wanted to write an extension for file(1). It'd
>> really be helpful if file would be able do determine if a file actually
>> is a configuration, and then if it is system or a cell config.
>>
>> Ralf
>>
>>>
>>> Maybe related to:
>>> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=906414
>>>
>>> Thanks,
>>> Andrea
>>>
>>>>
>>>> , but this is the example .cell file that builds
>>>> with the source code and is used as an example
>>>> in the README.md?
>>>> On Tuesday, October 20, 2020 at 12:56:36 PM UTC+3 Jari Ronkainen wrote:
>>>>
>>>> Hi,
>>>>
>>>> I'm interested in running ROS2 in a Linux cell, first through
>>>> QEMU and later on Up Xtreme board. Apologies for stupid
>>>> questions, and please refer me to a more appropriate forum
>>>> if this is the wrong place for them.
>>>>
>>>> First I have built a fresh virtual machine and installed Ubuntu
>>>> 20.04 LTS, then installed linux headers, build tools and python
>>>> through apt.
>>>>
>>>> The compilation and installing seems to work fine, but when I
>>>> get to the point where I should do
>>>>
>>>> # jailhouse enable jailhouse/configs/qemu-x86.cell
>>>>
>>>> I get an error message
>>>>
>>>> JAILHOUSE_ENABLE: Invalid argument
>>>>
>>>> I do not know how to get past this, any help?
>>>>
>>>>
>>>> Other things is it seems like the documentation is not entirely
>>>> up to date, and I noticed things like experimental virtio support
>>>> and IPC reworkings in 0.12 release notes, is there any more info
>>>> about those in the wild or should I just dig through git commits?
>>>>
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>>>
>
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