The backtrace code tries to look for an instruction of the form "sw ra, x(sp)"
to figure out the program counter of the calling function. When we generate
the kernel exception frame we store the 'ra' at the time of the exception
using an instruction of the same form. The problem is that the 'ra' at the
time of the exception is not the same as the 'program counter' at the time
of the exception.
The fix is to save the 'exception program counter' register by staging
it through the 'ra' register.
The RX overflow is reported in bit 2 on real hardware and Linux driver
for the same device already has this defined correctly.
This fixes frequent interrupt storms seen on RouterStation Pro boards.
Discussed with: gonzo
Fix a long-standing cpp compatibility bug: The -DFOO argument
(without an explicit value) should define FOO to 1 not to the empty
string.
Add support for CRLF newlines, based on a suggestion from Mark Rushakoff.
Obtained from: http://dotat.at/prog/unifdef/
mpt(4) controller. Previously, the code assumed that multiple match
patterns provided to an XPT_DEV_MATCH request were ANDed together.
Instead, they are ORed. Instead, to match peripherals for a specific bus,
one query needs to be performed to lookup the path ID of the bus. A second
query can then be performed matching peripherals attached to that path.
This approach also makes the code a bit cleaner as the returned match
results do not mix bus and perphierals.
Reported by: several folks
MFC after: 1 week
present. mpt(4) controllers that do not support RAID do not have an IOC6
page, for example.
- Correct a check for a missing page error in a debug function.
MFC after: 1 week
questions on the thermal calibration), and to read and set fan RPMs from
software. While here, fix a number of bugs.
Calibration code from: OpenBSD
MFC after: 2 weeks
HAST allows to transparently store data on two physically separated machines
connected over the TCP/IP network. HAST works in Primary-Secondary
(Master-Backup, Master-Slave) configuration, which means that only one of the
cluster nodes can be active at any given time. Only Primary node is able to
handle I/O requests to HAST-managed devices. Currently HAST is limited to two
cluster nodes in total.
HAST operates on block level - it provides disk-like devices in /dev/hast/
directory for use by file systems and/or applications. Working on block level
makes it transparent for file systems and applications. There in no difference
between using HAST-provided device and raw disk, partition, etc. All of them
are just regular GEOM providers in FreeBSD.
For more information please consult hastd(8), hastctl(8) and hast.conf(5)
manual pages, as well as http://wiki.FreeBSD.org/HAST.
Sponsored by: FreeBSD Foundation
Sponsored by: OMCnet Internet Service GmbH
Sponsored by: TransIP BV
sockaddr structures. As such, we have top copy the data structure
into a local buffer before we can reference it, otherwise we have
unaligned references (these are fixed up automatically on some CPUs,
but not on others). We do this unconditionally to make the code
easier to read and understand.
Submitted by: Grzegorz Bernacki
