Vendor import of byacc 20120526

Approved by:	des (mentor, implicit)
Import byacc 20130304
(split) Try to make sure the frame is indeed in the kernel memory.
(split) Fix the RT2860_TX_SW_CFG2 init value on older revisions of RT3070 chip.
(split) Be more selective when filtering for lib*.so.N files.  These are deleted
at the end of the upgrade process, after warning users to upgrade any
3rd party software (e.g., from the ports tree) which might link to the
libraries being removed.

Prior to this commit, the line
  /usr/lib/libc.so|...|/lib/libc.so.7
matched the regex, which -- upgrading from 9.x to 10.x, where libc.so is
a regular file and thus was not part of a line which matched the regex --
resulted in freebsd-update thinking that /usr/lib/libc.so was a shared
library which was being removed as part of the upgrade.  This had some
unfortunate consequences.

This will be part of an upcoming Errata Notice.
(split) Fix a use-after-free node reference issue when waiting for a return
from a management frame transmission.

This bug is a bit loopy, so here goes.

The underlying cause is pretty easy to understand - the node isn't
referenced before passing into the callout, so if the node is deleted
before the callout fires, it'll dereference free'd memory.

The code path however is slightly more convoluted.

The functions _say_ mgt_tx - ie management transmit - which is partially
true.  Yes, that callback is attached to the mbuf for some management
frames.  However, it's only for frames relating to scanning and
authentication attempts.  It helpfully drives the VAP state back to
"SCAN" if the transmission fails _OR_ (as I subsequently found out!)
if the transmission succeeds but the state machine doesn't make progress
towards being authenticated and active.

Now, the code itself isn't terribly clear about this.

It _looks_ like it's just handling the transmit failure case.

However, when you look at what goes on in the transmit success case, it's
moving the VAP state back to SCAN if it hasn't changed state since
the time the callback was scheduled.  Ie, if it's in ASSOC or AUTH still,
it'll go back to SCAN.  But if it has transitioned to the RUN state,
the comparison will fail and it'll not transition things back to the
SCAN state.

So, to fix this, I decided to leave everything the way it is and merely
fix the locking and remove the node reference.

The _better_ fix would be to turn this callout into a "assoc/auth request"
timeout callback and make the callout locked, thus eliminating all races.
However, until all the drivers have been fixed so that transmit completions
occur outside of any locking that's going on, it's going to be impossible
to do this without introducing LORs.  So, I leave some of the evilness
in there.

Tested:

* AR5212, ath(4), STA mode
* 5100 and 4965 wifi, iwn(4), STA mode
Fix bug in the ioapic emulation for level-triggered interrupts,
where a pin assertion while a source was masked would result in
the interrupt being lost, with the symptom being a console hang.
The condition is now recorded, and the interrupt generated when
the source is unmasked.

Discovered by:	OpenBSD 5.4 MP
Reviewed by:	neel
MFC after:	3 days
(split) Fix bug in the ioapic emulation for level-triggered interrupts,
where a pin assertion while a source was masked would result in
the interrupt being lost, with the symptom being a console hang.
The condition is now recorded, and the interrupt generated when
the source is unmasked.

Discovered by:	OpenBSD 5.4 MP
Reviewed by:	neel
MFC after:	3 days
Be a little more suspicious of thermal sensors, which can have single
crazy readings occasionally. One wild reading should not be enough to
trigger a shutdown, so instead wait for several concerning readings in
a row.

PR:		powerpc/180593
Submitted by:	Julio Merino
MFC after:	1 week
Add a configuration file and hints file for the Alfa Networks Hornet UB
board.

This is another AR9331 board similar to the Carambola2. It has different
ethernet and LED wiring though.

They make a variety of boards that mostly differ on the amount of RAM/flash
available.  Alfa Networks graciously donated a handful of 64MB RAM/16MB flash
boards so I can finish off 802.11s support for the AR93xx chips and do up
a tech demonstration with it.

This is enough to bring up the board.

Tested:

* Alfa networks UB Hornet board - 64MB ram, 16MB flash version.

Thankyou to Alfa Networks for the development boards!

Sponsored by:	Alfa Networks (hardware only)
Allow mixing bsd.files.mk with bsd.subdir.mk.

If a single Makefile wants to recurse into subdirectories and also
wants to install files, bsd.files.mk's targets would get ignored in
favor of those defined by bsd.subdir.mk because installfiles would
not get defined in bsd.files.mk.

Prevent this from happening by defining the targets in bsd.files.mk
with auxiliary names and listing them as dependencies of installfiles
instead.

This is required by bsd.test.mk, which needs to install a Kyuafile
in pretty much all cases but may also need to recurse into
subdirectories for build purposes.

Submitted by:	Julio Merino jmmv google.com
Reviewed by:	sjg
MFC after:	2 weeks
Move the TESTSBASE definition to bsd.own.mk.

We need to be able to reference the value of TESTSBASE without requiring
the inclusion of bsd.test.mk (e.g. in etc/Makefile), so move its definition
to the more generic bsd.own.mk.

Submitted by:	Julio Merino jmmv google.com
Reviewed by:	sjg
MFC after:	2 weeks
Set up the /usr/tests hierarchy.

Populate /usr/tests with the only test programs that currently live
in the tree (those in lib/libcrypt/tests/) and add all the build
machinery to accompany this change.

In particular:

- Add a WITHOUT_TESTS variable that users can define to request that
  no tests be put in /usr/tests.
- Add a top-level Kyuafile for /usr/tests and a way to create similar
  Kyuafiles in top-level subdirectories.
- Add a BSD.tests.dist file to define the directory layout of
  /usr/tests.

Submitted by:	Julio Merino jmmv google.com
Reviewed by:	sjg
MFC after:	2 weeks
Add missing WITHOUT_TESTS file.

Submitted by:	Julio Merio jmmv google.com
Reviewed by:	sjg
MFC after:	2 weeks
Add missing plain.test.mk.

Submitted by:	Julio Merino jmmv google.com
MFC after:	2 weeks
Add a tests(7) manual page.

This manual page intends to describe the structure and behavior of
the FreeBSD test suite installed in /usr/tests.  The contents have
been inherited from the NetBSD manual page.

As a side effect, this also updates the hier(7) manual page to
mention /usr/tests and points at tests(7) for more details.

Submitted by:	Julio Merino jmmv google.com
Reviewed by:	sjg
MFC after:	2 weeks
Disable WITH_TESTS= for now.
Add clang-CC and CC to list of hints allowing clang to identify its operating
mode as c++ instead of defaulting to c for the binary names CC and clang-CC.

This fixes builds that use cmake, which automatically sets CXX to
/usr/bin/CC by default.

PR:		bin/182442
Reviewed by:	dwhite, wca
MFC after:	2 days
Test UARTs physical address instead of virtual.
Use common OFW root code to set up fdtbus. This is an almost purely
negative diff that should improve reliability somewhat. There should be
no differences in behavior -- please report any that crop up. This has been
tested on ARM and PPC systems.

Tested by:	ray