[PTX] crt0

[Nathan Sidwell]

On 05/25/16 09:28, Alexander Monakov wrote:
> On Wed, 25 May 2016, Nathan Sidwell wrote:
>
>> This  patch reimplements crt0  as C rather than assembly.  That means it;ll be
>> good with 32 bit addresses.  I've also completely moved abort and exit into
>> newlib (a fork on github), which had it's own copies that failed to set the
>> exit code.  Things happened to work because they were never found, being
>> hidden by the ones provided in crt0.s.  You'll need to update your newlib
>> sources for exit codes to continue to work.
>
> Doesn't this break offloading compilation?

It won't -- but you're right about .weak not being undefined-is-zero.


>> Or is that something nvptx-run should check for and initialize?
>
> The interface between nvptx-run and crt0 would need to change to allow that.

That is exactly what I'm suggesting.  nvptx-run looks for a __soft_stack symbol 
and goes poking at it before launch.

nathan