Complete break-out of sys/sys/mac.h into sys/security/mac/mac_framework.h
begun with a repo-copy of mac.h to mac_framework.h. sys/mac.h now
contains the userspace and user<->kernel API and definitio

Complete break-out of sys/sys/mac.h into sys/security/mac/mac_framework.h
begun with a repo-copy of mac.h to mac_framework.h. sys/mac.h now
contains the userspace and user<->kernel API and definitions, with all
in-kernel interfaces moved to mac_framework.h, which is now included
across most of the kernel instead.

This change is the first step in a larger cleanup and sweep of MAC
Framework interfaces in the kernel, and will not be MFC'd.

Obtained from: TrustedBSD Project
Sponsored by: SPARTA

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Move tz_minuteswest and tz_dsttime to subr_clock.c

First part of a little cleanup in the calendar/timezone/RTC handling.

Move relevant variables to <sys/clock.h> and fix #includes as necessary.

Use libkern's much more time- & spamce-efficient BCD r

First part of a little cleanup in the calendar/timezone/RTC handling.

Move relevant variables to <sys/clock.h> and fix #includes as necessary.

Use libkern's much more time- & spamce-efficient BCD routines.

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- Change process_exec function handlers prototype to include struct
image_params arg.
- Change struct image_params to include struct sysentvec pointer and
initialize it.
- Change all consumers of

- Change process_exec function handlers prototype to include struct
image_params arg.
- Change struct image_params to include struct sysentvec pointer and
initialize it.
- Change all consumers of process_exit/process_exec eventhandlers to
new prototypes (includes splitting up into distinct exec/exit functions).
- Add eventhandler to userret.

Sponsored by: Google SoC 2006
Submitted by: rdivacky
Parts suggested by: jhb (on hackers@)

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INT_MAX is defined in file sys/limits.h, include the file now.

Let kernel POSIX timer code and mqueue code to use integer as a resource
handle, the timer_t and mqd_t types will be a pointer which userland
will define it.

Fix compiling warning on 64 bits system.

Register itimers_event_hook as a kernel event handler, so I don't
have to duplicate code to call it in exec() and exit1().

1. Set timer configuration values for sysconf().
2. Set overrun limit to INT_MAX, report ERANGE error if overrun will be
greater than INT_MAX.

Add several aliases for existing clockid_t names to indicate that the
application wishes to request high precision time stamps be returned:

Alias Existing

CLOCK_REALTIME_P

Add several aliases for existing clockid_t names to indicate that the
application wishes to request high precision time stamps be returned:

Alias Existing

CLOCK_REALTIME_PRECISE CLOCK_REALTIME
CLOCK_MONOTONIC_PRECISE CLOCK_MONOTONIC
CLOCK_UPTIME_PRECISE CLOCK_UPTIME

Add experimental low-precision clockid_t names corresponding to these
clocks, but implemented using cached timestamps in kernel rather than
a full time counter query. This offers a minimum update rate of 1/HZ,
but in practice will often be more frequent due to the frequency of
time stamping in the kernel:

New clockid_t name Approximates existing clockid_t

CLOCK_REALTIME_FAST CLOCK_REALTIME
CLOCK_MONOTONIC_FAST CLOCK_MONOTONIC
CLOCK_UPTIME_FAST CLOCK_UPTIME

Add one additional new clockid_t, CLOCK_SECOND, which returns the
current second without performing a full time counter query or cache
lookup overhead to make sure the cached timestamp is stable. This is
intended to support very low granularity consumers, such as time(3).

The names, visibility, and implementation of the above are subject
to change, and will not be MFC'd any time soon. The goal is to
expose lower quality time measurement to applications willing to
sacrifice accuracy in performance critical paths, such as when taking
time stamps for the purpose of rescheduling select() and poll()
timeouts. Future changes might include retrofitting the time counter
infrastructure to allow the "fast" time query mechanisms to use a
different time counter, rather than a cached time counter (i.e.,
TSC).

NOTE: With different underlying time mechanisms exposed, using
different time query mechanisms in the same application may result in
relative non-monoticity or the appearance of clock stalling for a
single clockid_t, as a cached time stamp queried after a precision
time stamp lookup may be "before" the time returned by the earlier
live time counter query.

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Add CLOCK_UPTIME to clock_gettime(2) reporting the current
uptime measured in SI seconds.

Sponsored by: TCP/IP Optimization Fundraise 2005

Fix name compatible problem with POSIX standard. the sigval_ptr and
sigval_int really should be sival_ptr and sival_int.
Also sigev_notify_function accepts a union sigval value but not a
pointer.

Cleanup some signal interfaces. Now the tdsignal function accepts
both proc pointer and thread pointer, if thread pointer is NULL,
tdsignal automatically finds a thread, otherwise it sends signal
to

Cleanup some signal interfaces. Now the tdsignal function accepts
both proc pointer and thread pointer, if thread pointer is NULL,
tdsignal automatically finds a thread, otherwise it sends signal
to given thread.
Add utility function psignal_event to send a realtime sigevent
to a process according to the delivery requirement specified in
struct sigevent.

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Let itimer store itimerspec instead of itimerval, so I don't have to
convert to or from timeval frequently.

Introduce function itimer_accept() to ack a timer signal in signal
acceptance code, this a

Let itimer store itimerspec instead of itimerval, so I don't have to
convert to or from timeval frequently.

Introduce function itimer_accept() to ack a timer signal in signal
acceptance code, this allows us to return more fresh overrun counter
than at signal generating time. while POSIX says:
"the value returned by timer_getoverrun() shall apply to the most
recent expiration signal delivery or acceptance for the timer,.."
I prefer returning it at acceptance time.

Introduce SIGEV_THREAD_ID notification mode, it is used by thread
libary to request kernel to deliver signal to a specified thread,
and in turn, the thread library may use the mechanism to implement
SIGEV_THREAD which is required by POSIX.

Timer signal is managed by timer code, so it can not fail even if
signal queue is full filled by sigqueue syscall.

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Don't touch last overrun if signal was already on queue.

Make p_itimers as a pointer, so file sys/proc.h does not need to include
sys/timers.h.

Implement POSIX timers. Current only CLOCK_REALTIME and CLOCK_MONOTONIC
clock are supported. I have plan to merge XSI timer ITIMER_REAL and other
two CPU timers into the new code, current three slots

Implement POSIX timers. Current only CLOCK_REALTIME and CLOCK_MONOTONIC
clock are supported. I have plan to merge XSI timer ITIMER_REAL and other
two CPU timers into the new code, current three slots are available for
the XSI timers.
The SIGEV_THREAD notification type is not supported yet because our
sigevent struct lacks of two member fields:
sigev_notify_function
sigev_notify_attributes
I have found the sigevent is used in AIO, so I won't add the two members
unless the AIO code is adjusted.

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Implement 32bit wrappers for clock_gettime, clock_settime, and
clock_getres.

Implement kern_adjtime(), kern_readv(), kern_sched_rr_get_interval(),
kern_settimeofday(), and kern_writev() to allow for further stackgap
reduction in the compat ABIs.

If the pointer to the new itimerval is NULL in kern_setitimer(), just
read the old value via kern_getitimer().

Various and sundry style fixes.

Split out kernel side of {get,set}itimer(2) into two parts: the first that
pops data from the userland and pushes results back and the second which does
actual processing. Use the latter to eliminate

Split out kernel side of {get,set}itimer(2) into two parts: the first that
pops data from the userland and pushes results back and the second which does
actual processing. Use the latter to eliminate stackgap in the linux wrappers
of those syscalls.

MFC after: 2 weeks

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move kern_nanosleep to sys/syscallsubr.h

Requested by: jhb

- rename nanosleep1 to kern_nanosleep
- Add a 32bit syscall entry for nanosleep

Reviewed by: peter
Obtained from: Yahoo!

/* -> /*- for copyright notices, minor format tweaks as necessary