rebuilding the xref table does not work for pdfs with
compressed object streams. as a work arround, we skip
xref table verification and ignore wrong xref gen #
for gen 0 objects.
convert:
x = B || W
MOVxLZX a, r; MOVxQZX r, b -> MOVxQZX a, r; MOVQ r, b
MOVxLSX a, r; MOVxQSX r, r -> MOVxQSX a, r; MOVQ r, r
the MOVQ can then be eleminated by copy propagation.
improve subprop() by accepting other mov and lea
instructions as the source op.
tlsServer() closes the passed in fd, in our case fd=1 leaving it
with no std output which got occupied by pipe() filedescriptor
which it then closed after duping... a classic.
delete all this mess. theres no reason to fork() and copy traffic
on a pipe at all as tlsServer() gives us a perfectly valid filedescriptor.
just dup() and exec() and we'r done.
the imported wc from sources is arround 8 times slower
than our old one. it is common to run wc on large log files
to count lines. so i think the implementation complexity
is justified. (just like with grep)
the following hooks have been added to the ehci Ctlr
structore to handle cache coherency (on arm):
void* (*tdalloc)(ulong,int,ulong);
void* (*dmaalloc)(ulong);
void (*dmafree)(void*);
void (*dmaflush)(int,void*,ulong);
tdalloc() is used to allocate descriptors and the periodic
frame schedule array. on arm, this needs to return uncached
memory. tdalloc()ed memory is never freed.
dmaalloc()/dmafree() is used for io buffers. this can return
cached memory when when hardware maintains cache coherency (pc)
or dmaflush() is provided to flush/invalidate the cache (zynq),
otherwise needs to return uncached memory.
dmaflush() is used to flush/invalidate the cache. the first
argument tells us if we need to flush (non zero) or
invalidate (zero).
uncached.h is gone now. this change makes the handling explicit.
map the whole ocm memory on boot so we can translate physical to
virtual addresses and back for uncached memory using KADDR() and
PADDR().
replace ualloc() with ucalloc() returning virtual address. physical
address can be acquired with PADDR() now.
as ocm is now always mapped, use KADDR() instead of tmpmap() for
mp bootstrap.
passing "", "." or ".." as name caused a crash in
getenv() as it would open the directory; then seek()
to determine the file size would fail and return -1.
now checking for these special names and set
error string when its bad.
doing a single read() will not work when /env has a
9p fileserver mounted onto it and the file size is bigger
than the i/o unit. so doing incremental reads until
we get eof.
there are no kernels currently that do page coloring,
so the only use of cachectl[] is flushing the icache
(on arm and ppc).
on pc64, cachectl consumes 32 bytes in each page resulting
in over 200 megabytes of overhead for 32gb of ram with 4K
pages.
this change removes cachectl[] and adds txtflush ulong
that is set to ~0 by pio() to instruct putmmu() to flush
the icache.
vbs/vbe members in Mode was only used in the vesadb
and cannot be changed from vgadb.
use shs/ehs in drivers when refering to the horizontal
sync pulse. clarify the matter in a comment.
link detailed timing modes at the head of the edid
modelist. these are the modes we'r interested in,
not the ones from vesadb.
igfx and vesa can determine monitor timing information from ddc
and store the edid info for connected monitors in vga->edid[].
when monitor type cannot be found in vgadb, we consult the edid
information and make a mode based on the edid info.
this avoids having to maintain a vgadb entry for each monitor.
monitor can be set to "[width]x[height]@[freq]Hz" for a specific
edid setting. when not found, a mode is searched based on the
size.
so the following should work:
aux/vga -m 1366x768@60Hz -l 1366x768x32
aux/vga -m auto -l 1366x768x32
dbvesamode() modified the passed in size string in the process
of option parsing. this is a no-go because the string might be
constant in the read only section. provide cracksize() function
for the parsing and make a static copy.
do the vendor specific monitor detection in vbesnarf() instead
of vbecheck(). vbecheck()'s purpose is to check if vesa bios
service is avialable, not snarf graphics card state.
nvidiascale() was a no-op because it missed the vbecall() at
the end of the function. this means it was never tested so i
add the missing vbecall(), but disable nvidiascale for now
until someone tests this.
keep fancy stuff out of the Vbe structure. it is just there for
making bios calls, not keep state about the graphics card.
we used to read beyond the boundaries of the becon because of
the end pointer was offset by the beacon header. this is
also what caused the double entries.
this bug happens when the kernel runs out of mount rpc
buffers when allocating a flush rpc. in this case, mntflushalloc()
will errorjump out of mountio() leaving the currently in
flight rpc in the mount. the caller of mountrpc()/mountio()
frees the rpc thats still queued in the mount leaving
to interesting results.
for the fix, we add a waserror() arround mntflushalloc() and
handle the error case like a mount rpc failure which will
properly dequeue the rpc's in flight.
this adds support for eap-peap/mschapv2 and eap-ttls/pap.
code has only been tested with freeradius and a cheap
access point, not tested with actual eduroam network.
this is used for wpa2 enterprise peap/mschapv2. server role
is not implemented as that would require changing the
wire format on the auth server.
the naming is unfortunate as we already have proto=mschap2 which
really refers to ntlmv2.
the FPOFF macro that follows the FXSAVE/FSAVE instructions in l.s
used to execute WAIT instruction when the TS flag was not set. this
is wrong and causes pending exceptions to be raised from fpsave which
is called from provsave() which holds up->rlock making it deadlock
when matherror() tries to postnote() to itself.
so making FPOFF non-waiting (just set TS flag).
we handle pending exception when restoring the context.
program secret plane size and position registers described as "reserved"
in g45_vol_3_register_0_0.pdf that was found by inspecting vesa bios
port traces.
also, we have to set 18:19 (Cursor/Dispaly/Overlay Planes Off) in
PIPExCONF while programming the planes on this card. this is what
vesa bios does on modeset.
avoid sync the jar file when fids get clunked.
the only reason to sync the jar on clunk is when it has
been marked dirty (cookies added or deleted) and we
want to flush the changes to disk.
- rewrite when jar->dirty != 0 (caller modified the in memory jar)
- reread when the jar->qid != stat(jar->file)->qid (on disk file changed)
- ignore deleted cookies in cookiesearch()
initially, pio was used to access registers so i didnt need
a kernel driver for initial testing.
pio does not work under efi, so use mmio to access registers.
check that Free.next and Free.prev pointers are not nil.
check that Free.left and Free.right are Poison in non-tree nodes.
check that Free.left and Free.right are *not* Poison in tree nodes.
change Poison to 0xffffffffcafebabe for 64bit machines.
we have to reset hwblank when switching drivers to
prevent the generic vgablank() to be called by
blankscreen().
remove code setting hwblank from vga drivers as
devvga will always force hwblank to be 1 or 0
depending on if the driver provides a native blanking
routine.
set hwaccel to 1 when the driver provides native fill
and scroll routines independent of softscreen being
disabled. this allows hw acceleration to be used when
softscreen gets switched off.
don't hold drawlock duing vga enable and disable, but just zero
the function pointers under drawlock *before* disabling the vga
device.
holding the drawlock while calling out into enable and disable
is not a good idea. with vgavesa, this might deadlock when
userspace realemu tries to print in a rio window with vgavesa.
in 9front, screen blanking is always initiated from process context,
so there is no need for a kproc anymore.
care has been taken for the race between vesadisable() and vesablank()
by acquiering the drawlock prior calling scr->dev->enable() and
scr->dev->disable(). this also has the side effect of accelerated
fills and scrolls not being called during device disable.
Prior to switching display, switch to text mode 3, which
is supported by anything, then set display, search for the
desired mode, load it if found. If not found, set the display
to the old one and switch to the old mode back.
the boolcopy optimization doesnt doesnt use Buffer.alpha, tho
the debug function dumpbuf() still can dereference it. to keep
it simple, always have Buffer.alpha point to the channel or
&ones when not used.
previously ircrc dialed through /net itself and resolved ips on its own. this prevented the use of an ip address, and also prevented use of ipv6. now you can use an ip, or a dns name that resolves to ipv6. the -T flag is also added to use tlsclient for encrypted connections.
At least on some NVIDIA cards the default scaling mode makes
black borders visible on all sides, even on native resolution.
This patch adds a generic "scaling MODE" command to vgactl
and adds support for it on VESA through NVIDIA VBE OEM extension.
It hasn't been tested on any other video cards, but shouldn't
break anything as the scaling mode is only set on write to vgactl.
we have to call tmpmap() with interrupts disabled as the map
is a per cpu and a interrupt can preempt us while we where
commited to use a entry but *before* we wrote it!
tmpunmap() already calls coherence() before flushpg() so it
is not needed after tmpunmap().
splhi() in l2free() isnt needed as l2free() is always called
with interrupts disabled from mmuswitch() and mmurelease().
fpsave needs to disable the fpu! otherwise we won't catch
the mathtrap() in the kernel or when context switching to
another process that will attempt to use it.
intrdisable() will always be able to unregister the interrupt
now, so there is no reason to have it return an error value.
all drivers except uart8250 already assumed it to never fail
and theres no need to maintain that complexity.
other operating systems always set the "don't fragment" bit
in ther outgoing ipv4 packets causing us to unnecesarily
call ip4reassemble() looking for a fragment reassembly queue.
the change excludes the "don't fragment" bit from the test
so we now call ip4reassemble() only when the "more fragmens"
bit is set or a fragment offset other than zero is given.
this optimization was discovered from akaros.
to allow bytewise access to /proc/#/fd, the contents of the file where
recreated on each call. if fd's had been closed or reassigned between
the reads, the offset would be inconsistent and a read could start off
in the middle of a line. this happens when you cat /proc/#/fd file of
a busy process that mutates its filedescriptor table.
to fix this, we now return one line record at a time. if the line
fits in the read size, then this means the next read will always start
at the beginning of the next line record. we remember the consumed
byte count in Chan.mrock and the current record in Chan.nrock. (these
fields are free to usefor non-directory files)
if a read comes in and the offset is the same as c->mrock, we do not
need to regenerate the file and just render the next c->nrock's record.
for reads smaller than the line count, we have to regenerate the content
up to the offset and the race is still possible, but this should not
be the common case.
the same algorithm is now used for /proc/#/ns file, allowing a simpler
reimplementation and getting rid of Mntwalk state strcture.
mpshutdown() used to call acpireset() making it impossible to build
a kernel without archacpi. now, mpshutdown() is a helper function
that only shuts down the application processors that gets used from
mpreset() and acpireset().
the generic machine reset code in exported by devarch's archreset()
function that is called by mpreset() and from acpireset() as a fallback.
so the code duplication that was in mpshutdown() is avoided.
the purpose of checkpages() is to verify consitency of the hardware mmu state,
not to notify on the console that a program faulted. a program could also
continue after handling the note. (this seems to be the case in go programs)
- shorten cpuidprnt so it doesnt have to break line
- addarchfile: complain when running out of entries
- fix range check in rmemrw() (harmless)
- use nil instead of 0 for pointers
- in 9front, the bootargs are in the form: method!device args
- remove redundant and wrong paragraphs regarding tcp booting
- document il boot method
- fix boot and bootrc confusions
this is a new more simple version of the mount cache
that does not require dynamic allocations for extends.
the Mntcache structure now contains a page bitmap
that is used for quick page invalidation. the size
of the bitmap is proportional to MAXCACHE.
instead of keeping track of cached range in the
Extend data structure, we keep all the information
in the Page itself. the offset from the page where
the cache range starts is in the low PGSHIT bits and
the end in the top bits of Page.va.
we choose Page.daddr to map 1:1 the Mountcache number
and page number (pn) in the Mountcache. to find a page,
we first check the bitmap if the page is there and then
do a pagelookup() with the daddr key.
change page cache ids (bid) to uintptr so we use the full
address space of Page.daddr.
make maxcache offset check consistent in cread().
use consistent types in cupdate() and simplify with goto.
make internal functions static.
use nil instead of 0 for pointers.
there is no use for "bootdisk" variable parametrization
of /boot/boot and no point for the boot section with its
boot methods in the kernel configuration anymore. so
mkboot and boot$CONF.out are gone.
move the rules for bootfs.paq creation in 9/boot/bootmkfile.
location of bootfs.proto is now in 9/boot/bootfs.proto.
our /boot/boot target is now just "boot".
expand the list of files specified in bootfs.proto and use them
as dependencies to bootfs.paq rule. this way, bootfs.paq is
regenerated when the to be included files have been modified.
the utf8 buffers b1 where allocated from fbufalloc() which gives
us BUFSIZE bytes, but Xfid->count can be bigger than that. so just
emalloc() the requested number of bytes.
when converting from Runes to utf-8, we have to account for the
terminating '\0' byte snprint() places, so fix the maxrune number
calculation instead of using BUFSIZE+1 as buffer size.
A buffer can be overflowed in the init function of kbmap.c by using a filename of more than 112 characters.
sample output:
% cd /sys/lib/kbmap
% touch aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
% kbmap
kbmap 1974: suicide: sys: trap: fault write addr=0xa6a96510 pc=0x000011df
offending code is most likely the call to sprint in the init function of /sys/src/cmd/kbmap.c,
which in this case writes /sys/lib/kbmap/$file to a 128-bit buffer.
I'm willing to submit a patch for this myself along with a few minor improvements/fixes to kbmap
if I can figure out the nuances of doing so.
--silasm
factotum is started in bootrc before the network is setup
(as we need it to negotiate wpa key for wifi). once, the network
is setup, the bootstrap authservers are passed in /net/ndb,
which factotum reads when doing bootstrap authdial. it does
this only when no authserver was specified earlier! but we
want net.rc to select the proper bootstrap authserver...
the $secstore variable takes precedence over $auth. as
there is no connection server yet, we have to select the set
of servers here and pass them to secstore with -s flag.
note that this will work if multiple addresses where
specified.
bug: Rnointerrupt was used on Vqueue.used.flags instead of
Vqueue.avail.flags.
introduce vqnotify() function that notifies the device
about available ring advancement.
avoid queue notifications there that can be slow by
checking Unonotify flag in Vqueue.used.flags.
keep track of the number of notifications in the queue.
- properly negotiate Fctrlrx feature bit for promisc and multicast.
- allow setting mac address with ea= option from plan9.ini
- dont read the isr register from ifstats() as it has the side effect of reseting isr status
- embedd the Vqueue array in the Ctlr structure avoiding indirection
- add a interrupt counter Vqueue.nintr for statistical purposes
- only read network status register if the feature has been negotiated
- change name to "virtio" as "ethervirtio" is kind of redundant
continue recursing when we get empty but non-negative answer
from a (claimed) authoritative nameserer that provides more
nameservers.
this fixes wordpress dns:
63766.3: sending to 192.0.80.93/ns1.wordpress.com bossypally.files.wordpress.com ip
63766: rcvd OK from 192.0.80.93 (authoritative)
Q: bossypally.files.wordpress.com ip
Auth: files.wordpress.com 5 min ns mdns1.wordpress.com
files.wordpress.com 5 min ns mdns2.wordpress.com
files.wordpress.com 5 min ns mdns3.wordpress.com
files.wordpress.com 5 min ns mdns4.wordpress.com
files.wordpress.com 5 min ns mdns5.wordpress.com
Hint: mdns1.wordpress.com 4 hr ip 192.0.75.7
mdns2.wordpress.com 4 hr ip 198.181.117.7
mdns3.wordpress.com 4 hr ip 198.181.116.7
mdns4.wordpress.com 4 hr ip 198.181.118.7
mdns5.wordpress.com 4 hr ip 192.0.74.7
63766.4: sending to 192.0.75.7/mdns1.wordpress.com bossypally.files.wordpress.com ip
63766: rcvd OK from 192.0.75.7 (authoritative)
Q: bossypally.files.wordpress.com ip
Ans: bossypally.files.wordpress.com 5 min ip 192.0.72.2
bossypally.files.wordpress.com 5 min ip 192.0.72.3
----------------------------
answer bossypally.files.wordpress.com 5 min ip 192.0.72.2
answer bossypally.files.wordpress.com 5 min ip 192.0.72.3
----------------------------
note the authoritative flag in the first response from ns1.wordpress.com that
would otherwise terminate the search.
add vctlcmd() function to setup and comlete control commands.
handle Vctlq and implement promiscuous and multicast mode commands.
remove Vqueue.block[] and Vqueue.header. these are not properties
of the queue (Vctlq as no block array).
the block[] array only needs to be half the queue size as we use
two descriptors per packet.
fix broken shutdown() and remove useless ctl() function.
