Clean the fpu trap code:
- since there are no hardware fpu operation queues on real sparc64 hardware,
don't bother declaring the relevant struct and fields.
- when an fpu instruction needs to be em

Clean the fpu trap code:
- since there are no hardware fpu operation queues on real sparc64 hardware,
don't bother declaring the relevant struct and fields.
- when an fpu instruction needs to be emulated, pass it directly to
fpu_cleanup rather than fake its appearance in the fpu queue. While there,
also pass the ready-to-use union sigval computed in trap() in case a
signal needs to be delivered.

ok claudio@ kettenis@

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No longer include <machine/fsr.h> from <machine/reg.h>, and have the few
users which need both explicitly include both.

ok claudio@ kettenis@

De-register fpu completion code.

There are pending changes to some of these files, and this would get in the
way.

ok claudio@ kettenis@

Remove vestigial bits of 32-bit binaries support; drop the `64' suffix in
struct names when the matching `32' flavour got removed.

Joint work with cheloha@, all bugs mine.

Change function definitions using the identifier-list form used in the
1st edition of Kernighan and Ritchie's The C Programming Language, to
that of the parameter-type-list form described in the ANSI

Change function definitions using the identifier-list form used in the
1st edition of Kernighan and Ritchie's The C Programming Language, to
that of the parameter-type-list form described in the ANSI X3.159-1989
standard.

In ISO/IEC 9899:2023 drafts, there is only one form of function definition.
"N2432 Remove support for function definitions with identifier lists".

ok kettenis@

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Push KERNEL_LOCK/UNLOCK() dance inside trapsignal().

ok kettenis@, visa@

p_comm is the process's command and isn't per thread, so move it from
struct proc to struct process.

ok deraadt@ kettenis@

Various printf claim to report the PID, so actually report that and not the TID

Build testing assistance from deraadt@

1 << 31 cleanup. Eitan Adler pointed out that there has been a
resurrection of the bad idiom in the tree.
sufficient review by miod, kettenis, tedu

Revert art@'s moving around of the KERNEL_LOCK()/KERNEL_UNLOCK() calls,
as it causes hangs in some ports, including libsigsegv's configure script

confirmed by krw@, landry@

There is a bunch of places in the kernel entry points where we don't
hold the kernel lock, but still need call one function that needs it.

Instead of grabbing the lock all over the place, move the l

There is a bunch of places in the kernel entry points where we don't
hold the kernel lock, but still need call one function that needs it.

Instead of grabbing the lock all over the place, move the locks into
the affected functions: trapsignal, scdebug*, ktrsyscall, ktrsysret,
systrace_redirect and ADDUPROF. In the cases we already hold the biglock
we'll just recurse.

kettenis@, beck@ ok

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Clean up after P_BIGLOCK removal.
KERNEL_PROC_LOCK -> KERNEL_LOCK
KERNEL_PROC_UNLOCK -> KERNEL_UNLOCK

oga@ ok

Make sure we grab the kernel lock before invoking trapsignal().
ok kettenis@

Make fpproc per-cpu. This turns fpproc into a macro, so adjust fpu/fpu.c
to avoid collisions.

There was hope, at one time, of sharing fpu/ with sparc. That's still
possible, but not with #ifdef SUN4U all over the place. The define should
be _v9 or __sparc64__ since it will equally well appl

There was hope, at one time, of sharing fpu/ with sparc. That's still
possible, but not with #ifdef SUN4U all over the place. The define should
be _v9 or __sparc64__ since it will equally well apply to all v9 machines.
We'll burn that bridge before we cross it.

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Make the array of fpu exception types/codes big enough.
Fix a typo too, such that we actually read beyond element 0 in all cases.
ok miod@

Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999. Proofed by myself and Theo.

one more... nuke clause 3 & 4

Remove a large chunk of `#ifdef notyet' code

Don't depend on curproc, pass the proc * down to the functions that need it (fmovr/fmovcc).

'sez' is not an english word; ok deraadt@

First round of __P removal in sys

Mostly rewritten decode of fpu emulation:
o handles decode of all 64 32 bit registers (based on type)
o easier to read (at least imo).
o needs some optimization (clarity was the first goal here)

Add more debugging stuff (including fpstate dumping)
Also, and more importantly, applying the same mask to rs2 and rd is bad ju-ju for the F?TO? instructions.

From NetBSD: debugging stuff to dump fpn's