[Cbe-oss-dev] elfspe & argument passing

[Ulrich Weigand]

Jeremy Kerr wrote:

> A couple of questions:
> 
>  * do I need to to do anything extra to make crt0 do the setup 
> correctly?

Link with -mstd-main.

>  * why does it need to be done in crt0 (hence causing an extra DMA) 
> anyway? This could done in libspe instead, where we set up the original 
> registers. We'd just need to copy the argv region to the top of local 
> store, and offset the stack pointer appropriately.

For a long time, crt0 would ignore the incoming stack pointer
and always reset $1 to the top of local store.

Also, when we discussed this, it was considered more efficient
to copy the arguments in via DMA.


Mit freundlichen Gruessen / Best Regards

Ulrich Weigand

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  GNU compiler/toolchain for Linux on System z and Cell BE
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