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any changes not taken noted on tech, but chiefly here i did not take the
cancelation - cancellation changes;
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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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data isn't necessary.
ok mpi@, ok&tweak natano@
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ok millert@
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ok deraadt@
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6.11.5 - Storage-class specifiers:
The placement of a storage-class specifier other than at the
beginning of the declaration specifiers in a declaration is
an obsolescent feature.
Diff from Jean-Philippe Ouellet (jean-philippe (at) ouellet.biz)
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not urgent.
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ok millert guenther
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ok deraadt@ guenther@ djm@
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resistant to prediction atacks by wrapping the existing LCG in a
random permutation generator based on a Luby-Rackoff block cipher.
lots of discussion and final ok deraadt@
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- seed2 is necessary, but use it as "seed2 + x" not "seed2 ^ x".
- skipping number is not needed, so disable it for 16bit generator (makes
the repetition period to 30000)
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hand editing to make comments line up correctly. Another pass is forthcoming that handles the cases that could not be done automatically.
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to an attack pointed out by David Wagner.
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