RISC-V/HiFive memory limitations

[Joel Sherrill]

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
>
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