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OK deraadt@, mpi@
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OK naddy@; no objections from kettenis@
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ok dlg@ tobhe@
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This diff exposes parts of clock_gettime(2) and gettimeofday(2) to
userland via libc eliberating processes from the need for a context
switch everytime they want to count the passage of time.
If a timecounter clock can be exposed to userland than it needs to set
its tc_user member to a non-zero value. Tested with one or multiple
counters per architecture.
The timing data is shared through a pointer found in the new ELF
auxiliary vector AUX_openbsd_timekeep containing timehands information
that is frequently updated by the kernel.
Timing differences between the last kernel update and the current time
are adjusted in userland by the tc_get_timecount() function inside the
MD usertc.c file.
This permits a much more responsive environment, quite visible in
browsers, office programs and gaming (apparently one is are able to fly
in Minecraft now).
Tested by robert@, sthen@, naddy@, kmos@, phessler@, and many others!
OK from at least kettenis@, cheloha@, naddy@, sthen@
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"looks right" deraadt@
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functionality is provided by <sys/stdarg.h> using compiler builtins.
Tested in a ports bulk build on amd64 by naddy@
OK naddy@ mpi@
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Return an error if write is requested, only reading is implemented.
Set *cnt only if the pointer is non-NULL.
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Use CP0 Count as a basis. Also take noise from virtual memory activity
by including BadVAddr.
OK deraadt@ dlg@
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rnd.c uses nanotime to get access to some bits that change quickly
between events that it can mix into the entropy pool. it doesn't
use nanotime to get a monotonically increasing set or ordered and
accurate timestamps, it just wants something with bits that change.
there's been discussions for years about letting rnd use a clock
that's super fast to read, but not necessarily accurate, but it
wasn't until recently that i figured out it wasn't interested in
time at all, so things like keeping a fast clock coherent between
cpu cores or correct according to ntp is unecessary. this means we
can just let rnd read the cycle counters on cpus and things will
be fine. cpus with cycle counters that vary in their speed and
arent kept consistent between cores may even be desirable in this
context.
so this is the first step in converting rnd.c to reading cycle
counter. it copies the nanotime backend to each arch, and they can
replace it with something MD as a second step later on.
djm@ suggested rnd_messybytes, but we landed on cpu_rnd_messybits.
thanks to visa for his eyes.
ok deraadt@ visa@
deraadt@ says he will help handle any MD fallout that occurs.
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Nothing uses the header anymore.
OK deraadt@ mpi@
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operations for ufs and ufs2 into the file_system[] array ...
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(fchmod +T by bootcode, chmod 600 by /etc/rc). If the seed is reused, and
HWRNG isn't available, the kernel won't get RB_GOODSEED indication...
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ok kettenis
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relax the fstat() check because the system will have left the file
in the right mode.
ok visa kettenis
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miod explained it was initially a long as it was thought drivers may
need to allocate storage but in practice they don't need more than
32 bits for an attribute.
suggested and reviewed by miod@
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Suggested by John Carmack. miod agrees a rename would make sense and
explained it was initially thought drivers may need to allocate storage
but in practice they don't need more than 32 bits for an attribute.
ok mpi@
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Looks good to miod@
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Looks good to miod@
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Tested on IP30 with DS1687.
Looks good to miod@
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bus_space_read_region_n, bus_space_write_region_n and
bus_space_set_region_n functions were all broken.
Same fix as arm64; Thanks to patrick@ for noting that mips64 had the same
code.
ok visa@
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but the linker does not complain about missing symbols.
Prompted by miod@
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Tested with boot64 on IP30. State of boot32 and bootecoff is unknown.
OK otto@, deraadt@
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'minphys()'. Just use & check for NULL instead, since 'minphys()' is
always called on the code path ([cd|sd|st]minphys) that calls
physio().
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in drivers. Terse one liners, NULLs instead of 0's, explicitly specify
all members, etc.
Nuke #ifdef notyet blocks related to the scsi_adapter in aic.
No intentional functional change.
ok tedu@
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i was lazy and just put them at the end of the existing set. fyi,
i think major 51 is free on all archs if anyone is looking for
another one.
ok claudio@
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The design is fairly simple: events, in the form of descriptors on a
ring, are being produced in any kernel context and being consumed by
a userland process reading /dev/dt.
Code and hooks are all guarded under '#if NDT > 0' so this commit
shouldn't introduce any change as long as dt(4) is disable in GENERIC.
ok kettenis@, visa@, jasper@, deraadt@
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OK mpi@
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OK mpi@
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While FIDO/U2F keys were already supported by the generic uhid(4)
driver, this driver adds the first step to tighten the security of
FIDO/U2F access. Specifically, users don't need read/write access to
all USB/HID devices anymore and the driver also improves integration
with pledge(2) and unveil(2): It is pledge-friendly because it doesn't
require any ioctls to discover the device and unveil-friendly because
it uses a single /dev/fido/* directory for its device nodes.
It also allows to support FIDO/U2F in firefox without further
weakening the "sandbox" of the browser. Firefox does not have a
proper privsep design and many operations, such as U2F access, are
handled directly by the main process. This means that the browser's
"fat" main process needs direct read/write access to all USB HID
devices, at least on other operating systems. With fido(4) we can
support security keys in Firefox under OpenBSD without such a
compromise.
With this change, libfido2 stops using the ioctl to query the device
vendor/product and just assumes "OpenBSD" "fido(4)" instead. The
ioctl is still supported but there was no benefit in obtaining the
vendor product or name; it also allows to use libfido2 under pledge.
With feedback from deraadt@ and many others
OK kettenis@ djm@ and jmc@ for the manpage bits
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and not just ".openbsd.randomdata.retguard". Accept both in the kernel
ldscripts so that they're placed together between the __retguard_{start,end}
symbols.
Similarly, match not just ".openbsd.randomdata" but also
".openbsd.randomdata.*" to pick up other random (pun intended) items.
While here, stub in those retguard bits into all the ldscripts.
ok deraadt@
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retguard and similar when profiling. However, that missed all the .S files,
as ${PROF} wasn't added when ${NORMAL_S} was converted from direct invocation
of ${AS} to instead use ${CC}. Similarly, mcount.o still had retguards
as it cannot be built with -pg. So: pass ${PROF} when compiling .S files,
and compile "no profiling" files with -fno-ret-protector on archs with
retguard.
feedback and ok mpi@ mortimer@
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section, which has grown a fair bit with the introduction of retguard.
Mortimer discovered the repeated 512-byte sequence as retguard keys, and
this resolves the issue. (Chacha does not fit on the media, so 1.5K early
drop RC4 is hopefully sufficient in our KARL link universe)
Version crank the bootblocks. sysupgrade -s will install new bootblocks.
ok djm mortimer
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of soft interrupts are lower than priorities of hard interrupts.
This allows the delivery of hard interrupts while soft interrupts
are masked.
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so the file cannot be re-executed upon the next boot. This provides a
stronger one-shot-upgrade model than the upgrade script's rm /bsd.upgrade.
Now various forms of upgrade failure will reboot into /bsd, which is probably
more recoverable. Performing fchmod -x depends on (1) use of MI boot.c
(not alpha/macppc/sparc64/sgi/octeon) and (2) "can write blocks" functionality
in the IO layer. Most architectures have this support now.
Two diagnostics "fchmod a-x %s: failed" and "/bsd.upgrade is not u+x" will
remain in the tree while refinements happen for some of the laggard
architectures.
based upon a discussion florian
tested in snapshots for more than a week without any complaints
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Use install -F to instead of cp, for fsync(2). Coupled with the new
sync(8) in the reorder_kernel script, the window for a incomplete /bsd
file on-disk due to a crash has now shrunk substantially.
Discussion with kettenis, millert and tedu
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memcpy() correct behaviour. This also brings the bcopy() macro into line.
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tightly-built ramdisk kernels, set the option in per-arch Makefile.inc
based upon SMALL_KERNEL
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details from the ELF header instead of faking it.
Proposal from mlarkin, tested on most architectures already
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ok deraadt
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