RISC-V/HiFive memory limitations

[Denis Obrezkov]

2017-06-25 2:15 GMT+02:00 Joel Sherrill <joel at rtems.org>:

> They are supposed to use the installed linkcmds.
>
> On Jun 24, 2017 6:04 PM, "Denis Obrezkov" <denisobrezkov at gmail.com> wrote:
>
>> 2017-06-23 21:03 GMT+02:00 Denis Obrezkov <denisobrezkov at gmail.com>:
>>
>>> 2017-06-23 20:16 GMT+02:00 Denis Obrezkov <denisobrezkov at gmail.com>:
>>>
>>>> 2017-06-23 16:39 GMT+02:00 Joel Sherrill <joel at rtems.org>:
>>>>
>>>>>
>>>>>
>>>>> On Jun 23, 2017 9:29 AM, "Gedare Bloom" <gedare at rtems.org> wrote:
>>>>>
>>>>> On Thu, Jun 22, 2017 at 8:32 PM, Denis Obrezkov <
>>>>> denisobrezkov at gmail.com> wrote:
>>>>> >> Ok, then I will try to adapt the default linkcmd file today.
>>>>> >>
>>>>> >> --
>>>>> >> Regards, Denis Obrezkov
>>>>> >
>>>>> >
>>>>> > Hello all,
>>>>> > It seems that data section wasn't copied from ROM, so I've added the
>>>>> > initialization code
>>>>> > and now I have a proper value. Thus, I can proceed further to new
>>>>> errors.
>>>>> >
>>>>> > I haven't started to develop new linkcmd file, general for the
>>>>> architecture
>>>>> > + specific
>>>>> > for the BSP. Should I? Hesham?
>>>>> >
>>>>> You may want to just get it working first, and then refactor the
>>>>> linkcmds.
>>>>>
>>>>>
>>>>> +1 just make sure it is working when you start doing this. :)
>>>>>
>>>>>
>>>>> > Also, I have a question:
>>>>> > there is a section called 'rwbarrier' and it is placed in data.
>>>>> Should it be
>>>>> > also initialized?
>>>>> > (copied from rom)
>>>>> Everything up to the bss probably should be copied from ROM.
>>>>>
>>>>>
>>>>> Agreed. Is there a crt0 in libgloss for this architecture to check
>>>>> against?
>>>>>
>>>>> Just remember that the order and layout of sections may have implicit
>>>>> ties to the code in the startup.
>>>>>
>>>>>
>>>>> > And is it possible to decrease a required memory amount by
>>>>> restricting a
>>>>> > user to C language usage?
>>>>> > (no C++ sections in linkcmd)
>>>>> >
>>>>> I don't think so. They shouldn't really be having an impact anyway
>>>>> except for C++ applications.
>>>>>
>>>>>
>>>>> All you end up with is a loop to iterate over the list of empty global
>>>>> constructors.
>>>>>
>>>>>
>>>>> >
>>>>> > --
>>>>> > Regards, Denis Obrezkov
>>>>> >
>>>>> > _______________________________________________
>>>>> > devel mailing list
>>>>> > devel at rtems.org
>>>>> > http://lists.rtems.org/mailman/listinfo/devel
>>>>>
>>>>>
>>>>> I have a little question: is there any connection between RTEMS linker
>> files
>> and example-v2 applications' linker files?
>> I think I have a similar mistake there: .data section is not initialized.
>>
>>
>>
>> --
>> Regards, Denis Obrezkov
>>
> Ok, I will investigate this and libgloss question.

Since, I was a bit lazy, I moved the low_ticker example into the rtems
testsuite folder and built it
Now, I have no mistakes with uninitialized data section and I was able to
proceed till the rtems_io_initialize function.

-- 
Regards, Denis Obrezkov
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