Fix the values for __WCHAR_{MIN,MAX}
Remove the panic from pmap_advise, we don't need to implement it
Implement pmap_remove_pages
Set the C bit in spsr to indicate when syscalls fail, and use it to
set errno on failure.
Merge the common code to print registers. While here quieten the
handlers to only print on interesting exceptions.
Start to support _setjmp/_longjmp on arm64