tree 360d237728c8ab7d7a6594fb34a06a87bfe9ff26
parent 16bb51b3492365be0a5f5131d2c15e5abbc528c5
author David Chisnall <github@theravensnest.org> 1715869582 +0100
committer David Chisnall <davidchisnall@users.noreply.github.com> 1715944762 +0100

Add missing stack check.

The ABI has included space for the required stack space from the start,
but we only recently started putting anything sensible there.  It turns
out that the switcher was missing this check.

This introduces a new errno code to let the caller differentiate between
a call that wasn't allowed to proceed and one that crashed.  We may want
to use this code for other stack badness.