MFC r253328:
Create a proper stack frame for i386 version of bcopy().
MFC r253525:
Use the same union name on the left and right sides of the conversion.
MFC r253526:
Fix several warnings.
Fix crash in aio_pty_cleanup() by initializing the pointer before
dereferencing.
MFC r253352:
MFi386: add ddb "show sysregs" command.