it's perhaps subtle just to track it down. with enough registers, and
depending on the architecture's addressing, plan 9 c uses a Static Base
register ("SB") to access data.
on Risc-V it looks like R3 is SB, so you need something early in chuck.s
that sets SB. in fact, make it the first instruction.
It might be
MOV $setSB(SB), R3
On Fri, 29 Aug 2025 at 21:51, José J. Cabezas Castillo <
[email protected]> wrote:
> Thank you very much — that’s exactly it. I modified the chuck.s loader,
> and now the execution continues, but nothing is being printed.
>
> I've found that in another part of the code, the PC resets to 0 again
> (when it tries to access the string data). I want to run more tests before
> asking for help.
>
> José J.
>
> El vie, 29 ago 2025 a las 21:40, <[email protected]> escribió:
>
>> I think you need to start chuck.s with
>> TEXT start(SB), $-4
>> This treats the routine as a leaf function and doesn't insert code to
>> make space for parameters on the stack, which I believe is what's happening
>> with R2.
>>
>> David
>>
>
>
> --
> José J. Cabezas
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