All symbols starting with `u' in bsd/dev/i386

• UCODE_SEL bsd/dev/i386/unix_signal.c:54
• UDATA_SEL bsd/dev/i386/unix_signal.c:53
• USER_CS bsd/dev/i386/unix_signal.c:50
• USER_DS bsd/dev/i386/unix_signal.c:51
• USER_PRIV bsd/dev/i386/sel.h:40