Don't enable unhandled interrupts before all interrupts are processed,
and also change all interrupt handlers to return processed MIPS_INT_MASK
values, rather than masked values of them.
- make IPI takes two arguments.
- add IPI event counters per-CPU.
- implement IPI functions which were missing or broken.
- insert DELAY while halting primary CPU in IPI handler.
tty subsystem locking is not consistent and Andrew didn't have
time to come up (or guide to) the right fix.
This prevents machines with serial console on zs(4) from deadlocking on
first input.
here will reenable interrupts as a side effect, and we don't want it here.
It could cause some event handlers to run twice (which should be harmless),
and trap() to be called on the wrong LWP in doreti_checkast (which can
probably cause some damage).
EMFILE. We treat _file as an unsigned short to double our range, with a
special case for -1 (closed). Make a note of what we should do about stdio
if we ever bump libc. We could change _file in the future compatibly to an
int by putting it in the extension space but for now we don't bother.
pre/postcall wrapper around the exported namei, since postcall no
longer needs to execute VFS_ROOT (which is a bad thing to do while
potentially holding on to a locked vnode, mmkay).
usable VGA console ("call ddb_vgapost")
-allow to switch from/to screens occupied by an X server if the graphics
device is console and in polling mode (ie DDB)
This together allows to get a DDB session on a VGA console if the
system crashed while X11 was running.
As long as the protocol to tell X servers about virtual screen switches
is as primitive as it is, it is unsafe to restart an X session afterwards.
So this is basically for crash analysis.
tricky) with the help of rump system calls instead of calling namei
by themselves. Trust me when I say it was non-trivial to get the
namei calls right.
Use fewer 'error = ...; break;' statements and more 'return
...;'
Make the SIOCSIFFLAGS case more clear by using a switch
statement instead of an if-else if-else chain.
Shorten a staircase, and remove two unnecessary curly
braces.
matt