Fix tracedump() for sun3 and sun2 by adding __noinline attribute.

It unwinds stack frame by using address of its first argument, which
does not, of course, work if inline-expanded.

- remove unused
- use cpu_{g,s}etmodel

Retire varargs.h support. Move machine/stdarg.h logic into MI
sys/stdarg.h and expect compiler to provide proper builtins, defaulting
to the GCC interface. lint still has a special fallback.
Reduce a

Retire varargs.h support. Move machine/stdarg.h logic into MI
sys/stdarg.h and expect compiler to provide proper builtins, defaulting
to the GCC interface. lint still has a special fallback.
Reduce abuse of _BSD_VA_LIST_ by defining __va_list by default and
derive va_list as required by standards.

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Remove clause 3 and 4 from TNF licenses

bare asm -> __asm

merge ktrace-lwp.

Add const.

de-__P, remove register, ansify, b* -> mem*, u_int*_t -> uint*_t.

__KERNEL_RCSID()

Use PAGE_SIZE rather than NBPG.

Fix 2 sequence point errors.

vm_offset_t -> vaddr_t or paddr_t or db_addr_t, as appropriate.
vm_size_t -> vsize_t
Purge register qualifiers.
bcopy() -> memcpy(), bzero() -> memset()

Added the prom_kbdid function, to help us figure out if
the console keyboard is on the parallel interface or zs1.

Fixed a bug processing options - we were ORing
an uninitialized auto into boothowto.

Made prom_putchar and prom_putstr use the PROM putchar
function instead of framebuffer functions. This makes
serial consoles work again.

Added a function, prom_sd_target, to translate a PROM
sd unit number into a SCSI target. Now only set up our
g0 and g4 handlers inside prom_abort(), so we're not
normally running with them.

Now, instead of swapping in and out the PROM's segment zero,
swap in and out the mappings for virtual pages zero through three,
which are what the PROM really uses. This is tied to the
move to ELF a

Now, instead of swapping in and out the PROM's segment zero,
swap in and out the mappings for virtual pages zero through three,
which are what the PROM really uses. This is tied to the
move to ELF and the low memory usage changes.

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In prom_init, when making our local copy of the bootparams,
be sure to calculate the shift in terms of chars, not struct
bootparams, and don't shift undefined arguments.

Added.