Remove Darwin, MACH and Mach-O support.

Remove clause 3 and 4 from TNF licenses

WARNS=3

- add a new flags field to the emulation vector, with one user so far
EMUL_FLAG_NETBSD32. set EMUL_FLAG_NETBSD32 in any 32 bit on 64 bit
kernel emulation layers.
- if EMUL_FLAG_NETBSD32 is set, calc

- add a new flags field to the emulation vector, with one user so far
EMUL_FLAG_NETBSD32. set EMUL_FLAG_NETBSD32 in any 32 bit on 64 bit
kernel emulation layers.
- if EMUL_FLAG_NETBSD32 is set, calculate the proper argument count.
(XXX: this should use register32_t, but that's not visible to all
builders of kdump...)

now netbsd32_ioctl(2) actually reports sane values, and other arguments
are mostly correctly printed (there are still some signed extension
issues with 32 bit numbers being displayed as "0xffffffff8xxxxxxx".)

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Stop core dump if an ioctl trace has fewer than expected arguments.
- Check names of system calls (for special treatment) because emulations
might use different numbers.
- Report an error if argume

Stop core dump if an ioctl trace has fewer than expected arguments.
- Check names of system calls (for special treatment) because emulations
might use different numbers.
- Report an error if arguments to -p or -m non-numeric.
- Just take last of -x and -Xvalue, stop -X0x80000000 being valid (core dumps).
- Keep 'last used' emulation_ctx at top of list, create on lookup (usually
EMUL anyway), delete when exit called (doesn't return).
- Slightly improve hack to get correct system call name in execve return
when emulation has changed.
- Rename global variables 'current'/'previous' to 'cur_emul'/'prev_emul'.
(TODO: save system call type (and maybe an argument) per pid so GIO trace
format can depend on the actual system call.)
Fixes part of PR sparc64/23473 - but system call arguments will still not be
displayed correctly.

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kdump now displays Mach services names itself, including a table of
id/names in sys/compat/mach/mach_services_names.c

Remove ports and flags displays, the information is already in the message.

KNF:
- ansify
- no breaks after returns
- statics where needed
- no exit after errx

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22365, verified by myself.

Now properly display Mach traps

Provide hooks for signal number to name translation, and use them for kill
and PSIG.

XXX[1]: This shows that signal emulation ktrace is slightly busted: posted
signals should really be translated t

Provide hooks for signal number to name translation, and use them for kill
and PSIG.

XXX[1]: This shows that signal emulation ktrace is slightly busted: posted
signals should really be translated to the emulated ones instead of
producing ktrace records with the signal numbers of the native
emulation.
XXX[2]: There are other places where signal names can be displayed, but this
is not done yet.

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Cosmetic fix so that RET record after CALL execve get the appropriate syscall
even if the emulation changed

Make files here compile again.

avoid using "errno" as struct member name, to avoid conflict with errno.h.
ok by jdolecek

adapt to *syscallnames[] change (it's now const char * const foo[]),
constify

put setemul(), ectx_* & appropriate structures to separate file, to make it
more easily sharable with ktruss(1)