I have looked at sharing the stack with coreboot/vsa, but it really gets messy.

Also, there is the still unexplained zero'ing of memory at 0x1000.
That mostly working example i sent was with coreboot text at 0x2000.

So vsa does nothing ABOVE %esp, just in the stack?

This is weird. Can you trap the fs2 on a write to 0x1000 and see if that occurs?

thanks

ron

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