bit flag, otherwise if a thread acquired a lock, another thread
or the current thread itself can no longer acquire another lock
because thread_mask_set() return whole flag word, this results
bit leaking in the word and misbehavior in later locking and
unlocking.
the command set (only so long as the module is present):
o add db_command_register and db_command_unregister to add and remove
commands, respectively
o replace linker sets with SYSINIT's (and SYSUINIT's) that register
commands
o expose 3 list heads: db_cmd_table, db_show_table, and db_show_all_table
for registering top-level commands, show operands, and show all operands,
respectively
While here also:
o sort command lists
o add DB_ALIAS, DB_SHOW_ALIAS, and DB_SHOW_ALL_ALIAS to add aliases
for existing commands
o add "show all trace" as an alias for "show alltrace"
o add "show all locks" as an alias for "show alllocks"
Submitted by: Guillaume Ballet <gballet@gmail.com> (original version)
Reviewed by: jhb
MFC after: 1 month
- Retire IVARs for passing IRQs around. Instead, ppbus and ppc now allow
child devices to access the interrupt by via a rid 0 IRQ resource
using bus_alloc_resource_any().
- ppc creates its own interrupt event to manage the interrupt handlers of
child devices. ppc does not allow child devices to use filters. It
could allow this if needed, but none of the current drivers use them
and it adds a good bit of complication. It uses
intr_event_execute_handlers() to fire the child device interrupt handlers
from its threaded interrupt handler.
- Remove the ppbus_dummy_intr() hack. Now the ppc device always has an
interrupt handler registered and we no longer bounce all the way up to
nexus to manage adding/removing ppbus child interrupt handlers. Instead,
the child handlers are added and removed to the private interrupt event
in the ppc device.
all the non-filter handlers attached to an interrupt event. This can be
used by device drivers which multiplex their interrupt onto the interrupt
handlers for child devices.
It seems we only depend on COMPAT_43 to implement the send() and recv()
routines. We can easily implement them using sendto() and recvfrom(),
just like we do inside our very own C library.
I wasn't able to really test it, apart from simple compilation testing.
I've heard rumours that COMPAT_SVR4 is broken inside execve() anyway.
It's still worth to fix this, because I suspect we'll get rid of
COMPAT_43 somewhere in the future...
Reviewed by: rdivacky
Discussed with: jhb
On the i386 architecture, the processor only saves the current value
of `%esp' on stack if a privilege switch is necessary when entering
the interrupt handler. Thus, `frame->tf_esp' is only valid for
an entry from user mode. For interrupts taken in kernel mode, we
need to determine the top-of-stack for the interrupted kernel
procedure by adding the appropriate offset to the current frame
pointer.
Reported by: kris, Fabien Thomas
Tested by: Fabien Thomas <fabien.thomas at netasq dot com>
someone else might change it, so after we re-acquire the lock on it,
we need to check it is still valid. People have been panicing in this
function due to soem edge cases which I have hopefully removed.
Reviewed by: keramida @
Obtained from: 1 week
common PowerPC code when all we want to achieve is to enable
external interrupts. We can set PSL_RI at any time before we
allow interrupts and/or exceptions, so move it to the AIM
specific initialization and do it when we also set PSL_ME
(machine check enable).
configuring the L2 cache on the BSP. Nor the L3 cache. We
merely print the settings.
Save the L2 and L3 cache configuration in global values so
that we know how to configure the cache on APs.
ABI change on ILP32 platforms and relating to events. However
it's harmless on little-endian ILP32 platforms in the sense
that it doesn't cause breakages. Old ILP32 thread libraries
write a 32-bit th_p and new thread libraries write a 64-bit
th_p. But due to the fact that we have an unused 32-bit data
field right after th_p and that field is always initialized to
zero, little-endian ILP32 machines effectively have a valid
64-bit th_p by accident. Likewise for new thread libraries and
old libthread_db: little endian ILP32 is unaffected.
At this time we don't support big-endian threaded applications
in GDB, so the breakage for the ILP32 case goes unnoticed.
where critical. Some places still use ps_pread/ps_pwrite directly,
but only need changed when byte-order comes into the picture.
Also, change th_p in td_event_msg_t from a pointer type to
psaddr_t, so that events also work when psaddr_t is widened.
A very long time ago we had raw device nodes. quot(8) was supposed to
use these when running `quot -a'. For some reason the code got once
changed to strip the device name until it reaches the last slash. This
is not reliable, because this means /dev/mirror/foo will be stripped to
/dev/foo.
This bug also exists on RELENG_7 and RELENG_6, but I think I'll just
merge them back somewhere after the upcoming releases. There's no rush.
MFC after: 2 months
rt_check() in its original form proved to be sufficient and
rt_check_fib() can go away (as can its evil twin in_rt_check()).
I believe this does NOT address the crashes people have been seeing
in rt_check.
MFC after: 1 week
HAVE_STRUCT_STAT_ST_FLAGS, Linux support depends on the
existence of the appropriate ioctl() options. In particular,
this should fix some nagging compile errors on Linux platforms
that don't have e2fsprogs-devel installed.
In particular:
* tar -x -P follows symlinks to existing dirs, but not without -P
* symlinks to files are always replaced
* broken symlinks are always replaced
via nmount(), build up an iovec where each iovec member is an NFS mount
option, and pass the iovec down to the kernel via nmount(). These options
are then parsed in the kernel.
This should make it easier to add new NFS mount options in future.
Many, many thanks to Doug Rabson for taking my initial patches,
and cleaning them up. In addition, Doug added a fallback_mount()
function so that the newer mount_nfs program will work against older
kernels, to facilitate upgrading/downgrading scenarios.
Doug also re-wrote the mount_nfs.8 man page.
Reviewed by: dfr
