m0. But m0 may be freed later, so trying to use sip6 at the end of this
function is wrong. My guess is that we want to reference the data area
of m (the mbuf about to be send) instead at this point.
Fix a panic on Xen (where a data area of a mbuf may be unmapped when the
mbuf is freed), and probably potential data/pool corruption in other cases.
The change adopts the idea of fxp to drop the incoming packet and panic
if the old mbuf cannot be reloaded. Since the bus_dmamap is allocated
during attach, this is not supposed to happen. Since a lot of code moves
anyway, factor out the allocation of RX ring elements, which is shared
between the init path and the RX interrupt path.
XXX A better fix might be to borrow the mbuf from the logic end of the
XXX ring buffer, but that needs more involved driver changes.
Reviewed by dyoung@ and nick@
- Note that mouse events are returned in struct wscons_event via read(2).
XXX: We should have complete descriptions about struct wscons_event
XXX: and WSMOUSEIO ioctls defined in <sys/dev/wscons/wsconsio.h> here.
any threads are created turned out to be not such a good idea.
there are stronger requirements on what has to work in a forked child
while a process is still single-threaded. so take all that stuff
back out and fix the problems with single-threaded programs that
are linked with libpthread differently, by checking if the library
has been started and doing completely different stuff if it hasn't been:
- for pthread_rwlock_timedrdlock(), just fail with EDEADLK immediately.
- for sem_wait(), the only thing that can unlock the semaphore is a
signal handler, so use sigsuspend() to wait for a signal.
- for pthread_mutex_lock_slow(), just go into an infinite loop
waiting for signals.
I also noticed that there's a "sem2" test that has never worked in its
single-threaded form. the problem there is that a signal handler tries
to take a sem_t interlock which is already held when the signal is received.
fix this too, by adding a single-threaded case for sig_trywait() that
blocks signals instead of using the userland interlock.
build when EXEC_AOUT is not defined, the syscalls.master entry has to be
conditionalized. Alpha did so already, so let the other archs catch up
with it.
Go-on: christos
This is reported by Dave Huang on lib/25795,
MORIYAMA Masayuki <msyk _at_ mtg.biglobe.ne.jp> and
"NARUSE, Yui" <naruse _at_ airemix.com>, and fixed by MORIYAMA-san.
character area.
This is reported by MORIYAMA Masayuki <msyk _at_ mtg.biglobe.ne.jp> and
"NARUSE, Yui" <naruse _at_ airemix.com>, and fixed by MORIYAMA-san.
Changes since 4.13:
* DragonFly ELF note support
* read buffer dynamically allocated
* Add -h flag and dereference symlinks if POSIXLY_CORRECT
* Avoid search and regex buffer overflows
* cross-compilation fixes
* don't close stdin in the library.
* search for elf notes in shared libraries too.
Now with more magic than ever before!
