(struct inf_ttrace_page): New.
(struct inf_ttrace_page_dict): New.
(inf_ttrace_num_threads_in_syscall)
(inf_ttrace_reenable_page_protections): New variables.
(inf_ttrace_enable_syscall_events)
(inf_ttrace_disable_syscall_events, inf_ttrace_get_page)
(inf_ttrace_remove_page, inf_ttrace_mask_page_protections)
(inf_ttrace_enable_page_protections)
(inf_ttrace_disable_page_protections)
(inf_ttrace_insert_watchpoint, inf_ttrace_remove_watchpoint)
(inf_ttrace_can_use_hw_breakpoint)
(inf_ttrace_region_size_ok_for_hw_watchpoint)
(inf_ttrace_stopped_by_watchpoint): New functions.
(inf_ttrace_him): Remove unsused varaible `tts'.
(inf_ttrace_create_inferior): Add assertionts.
(inf_ttrace_mourn_inferior): Clear page dictionary.
(inf_ttrace_attach): Set initial event mask.
(inf_ttrace_detach): Reset number of threads in system call.
(inf_ttrace_wait): Deal with system call events.
(inf_ttrace_target): Initialize "hardware" watchpoint-related
parts of the target vector.
(_initialize_inf_ttrace): New prototype and function.
* inf-ttrace.h: New file.
* hppa-hpux-nat.c [HAVE_TTRACE]: Include <sys/ttrace>.
Include "inf-ttrace.h".
(ss_mpsfu_high): Define to ss_tlsp if necessary.
(hppa_hpux_fetch_register, hppa_hpux_store_register): Use
ptid_get_pid instead of PIDGET. Modify to handle both ttrace and
ptrace systems.
(_initialize_hppa_hpux_nat) [HAVE_TTRACE]: Call inf_ttrace_traget
instead of inf_ptrace_target.
* config/pa/hpux.mh (NATDEPFILES): Add inf-ttrace.o.
* Makefile.in (inf_ttrace_h): New variable.
(hppa-hpux-nat.o): Update dependency.
(inf-ttrace.o): New dependency.
(ALLDEPFILES): Add inf-ptrace.c and inf-ttrace.c.
