* i386bsd-nat.c: Include <signal.h>, <stddef.h> and

* i386bsd-nat.c: Include <signal.h>, <stddef.h> and
<sys/sysctl.h>.
(store_inferior_registers): Wrap long line.
(i386bsd_dr_get_status): Fix typo in comment.
(_initialize_i386bsd_nat): New function.  * i386bsd-tdep.c: New
file.  * config/i386/tm-fbsd.h (IN_SIGTRAMP): New define.
(i386bsd_in_sigtramp): New prototype.
(SIGTRAMP_START, SIGTRAMP_END): Redefine in terms...
(i386bsd_sigtramp_start, i386bsd_sigtramp_end): ...these new
(external) variables.
(SIGCONTEXT_PC_OFFSET): Removed.
(FRAME_SAVED_PC): New define.
(i386bsd_frame_saved_pc): New function.  * config/i386/fbsd.mt
(TDEPFILES): Add i386bsd-tdep.o.