[metal] Some minor fixes and tweaks#933

Merged

jart merged 4 commits intojart:masterfrom

tkchia:tkchia/20231105

Nov 14, 2023

Commits on Nov 5, 2023

[metal] Ensure DF is clear when calling C from exception handler
tkchia
committed
[metal] Mark some internal routines and declarations as `@internal`
tkchia
committed

Commits on Nov 6, 2023