This is a workaround for the fact that the CFE is compiled as a 64-bit
application and therefore sets the SR_KX bit every time we call into
it (for e.g. console).
A TLB miss for any address above 0xc0000000 with the SR_KX bit set will
end up at the XTLB exception vector. We workaround this by copying the
standard TLB handler at the XTLB exception vector.
Approved by: imp (mentor)
through fork_trampoline.
This was caused because we were clearing the SR_INT_IE and setting
SR_EXL bits of the status register at the same time. This meant
that if an interrupt happened while this MTC0 was making its way
through the pipeline the exception processing would see the
status register with SR_EXL bit set. This in turn would mean that
the COP_0_EXC_PC would not be updated so the return from exception
would be to an incorrect address.
It is easy to verify this fix by a program that forks in a loop
and the child just exits:
while (1) {
pid_t pid = vfork();
if (pid == 0)
_exit(0);
if (pid != -1)
waitpid(pid, NULL, 0);
}
Also remove two instances where we set SR_EXL bit gratuitously in exception.S.
Approved by: imp (mentor)
Continuous catopen() calls cause 4 failig stat(2) each, which means a lot
of overhead. It is also a good idea to keep the opened catalogs in the memory
to speed up further catopen() calls to the same catalog since these catalogs
are not big at all. In this case, we count references and only free() the
allocated space when the reference count reaches 0. The reads and writes to
the cache are syncronized with an rwlock when these functions are called from
a threaded program.
Requested by: kib
Approved by: delphij
obio. Take advantage of the fact that obio only really supports uart
at the moment to use the uart bus tag always for IOPORT allocations.
# this needs to be redone to conform to FreeBSD standards and allow for
# additional drivers for SoC hardware to attach
in the pcb at the td_lock offset, rather than in the struct thread at
the td_lock offset. And we were storing a pointer to the old thread
rather than to the mutex. Why this didn't always kill us, I'll never
know.
Fix an obsolete comment and update the prototype in the comments.
Also note what variables are in what registers since this function is
a little complex...
neel@ found this problem and proposed this fix. This cures a number
of different problem reports out there, and gets us booting octeon to
the login prompt...
Submitted by: neel@
Reviewed by: rrs@, gonzo@
Also remove upper 16bits which always seem to be 0xFFFF. We don't
allocate more than 64KB buffer anyway.
This change make smbutil work on sparc64.
Reviewed by: marius, bp
Approved by: bp
where the type is 32-bit. ZFS can handle 64-bit timestamp internally
but zfs_setattr() would check if the time value can fit, we change the
checking macros to match 64-bit timestamp if the platform supports it.
This change has some downsides like, while you can import zfs on 32-bit
platforms, the timestamp would overflow if they are out of the range.
This fixes the Y2.038K issue on platforms using 64-bit timestamps.
Reviewed by: pjd
MFC after: 1 month
symbols resolving in DDB
- When zeroing .bss/.sbss do not round end address to page boundary,
it's not neccessary and might destroy data pased by trampoline or
boot loader
- Allow -h option to work if the listing contains at least one device
file.
- Align major and minor device numbers correctly to the size field.
PR: bin/125678
Approved by: trasz (mentor)
MFC after: 1 month
provides an empty fts_name and reporting the full path is more
appropriate especially with the -R option.
PR: bin/107515
Submitted by: bde
Approved by: trasz (mentor)
MFC after: 1 week
ifmultiaddr structures' reference to the parent interface, unless the parent
interface is really detaching. While here, program only link layer multicast
filters to a wlan's hardware parent interface.
PR: kern/142391, kern/142392
Reviewed by: sam, rpaolo, bms
MFC after: 1 week
In the current code, the locking is completely broken and may lead
easilly to deadlocks. Fix it by using the proc_mtx, linked to the
suspending thread, as lock for the operation. Keep using the
thread_lock for setting and reading the flag even if it is not entirely
necessary (atomic ops may do it as well, but this way the code is more
readable).
- Fix a deadlock within kthread_suspend().
The suspender should not sleep on a different channel wrt the suspended
thread, or, otherwise, the awaker should wakeup both. Uniform the
interface to what the kproc_* counterparts do (sleeping on the same
channel).
- Change the kthread_suspend_check() prototype.
kthread_suspend_check() always assumes curthread and must only refer to
it, so skip the thread pointer as it may be easilly mistaken.
If curthread is not a kthread, the system will panic.
In collabouration with: jhb
Tested by: Giovanni Trematerra
<giovanni dot trematerra at gmail dot com>
MFC: 2 weeks
Some Exchange systems wrap lines over 75 characters long while converting
messages to quoted-printable, preventing ctm_rmail from reassembling
emailed deltas. For a negligible loss of encoding efficiency, this change
allows ctm deltas to once more pass through Exchange undamaged.
