PR kern/51514: ptrace(2) fails for 32-bit process on 64-bit kernel

Updated from the original patch in the PR by me.

branches: 1.28.6; 1.28.10;
Remove __HAVE_PROCESS_XFPREGS and add the extra parameter for the size
of the fp save area to all the process_read_fpregs() and
process_write_fpregs() functions.
None of the functions have been modified to use the new parameters.
The size is set for all the writes, but some of the arch-specific reads
just pass NULL.
The amd64 (and i386) need variable sized fp register save areas in order
to support AVX and other enhanced register areas.
These functions are rarely called - so the extra argument won't matter.

branches: 1.27.32; 1.27.42; 1.27.48;
remove clause #3 from my license where there are no other
copyright holders involved.

branches: 1.26.6; 1.26.8; 1.26.10; 1.26.12;
Remove NETBSD32_OFF_T_RETURN() netbsd32_lseek() now uses MI code to return
all 64 bits of the new position.

branches: 1.25.2;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

Fix previous, 'long long' is 8 byte aligned on sparc32

Define netbsd32_uint64 for 64bit integers with the alignment requirement
of the corresponding 32bit architecture.
Use it for the 64bit items in netbsd32_statvfs so that the structure
doesn't collect 8byte alignment (and 4 bytes of trailing padding).
This replaces the 'packed' attribute which wasn't architecture specific
and would cause massive overheads accessing every member of sparc64.
Should allow the MIPS64 port do DTRT.

branches: 1.22.4; 1.22.12; 1.22.14;
Use NETBSD32PTR64() and NETBSD32PTR32() throughout.

branches: 1.21.16; 1.21.20; 1.21.22; 1.21.24;
Add the sparc64 MD bits to get usable coredumps for COMPAT_NETBSD32
binaries.

branches: 1.20.2; 1.20.4;
ANSIfication: u_intN_t -> uintN_t, use ANSI function declarations/definitions
instead of K&R ones.

branches: 1.19.2; 1.19.4; 1.19.6;
merge ktrace-lwp.

remove unnecessary includes.

When returning 64bit values (from netbsd32_lseek) fix up the return
value vector (of 32bit values, most likely) via a MD macro.

branches: 1.16.16;
provide a definition NETBSD32_MID_MACHINE which tells for the a.out MID
to look for in 32-bit emulation

move MI stuff to the MI include

branches: 1.14.2;
Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

struct proc * -> struct lwp *

change 'data' arg of fo_ioctl to void * to match file.h

Merge the nathanw_sa branch.

In preparation for COMPAT_NETBSD32 on SH-5:

- The MD netbsd32_machdep.h header now defines the 32-bit pointer type
instead of using u_int32_t everywhere,
- The MD netbsd32_machdep.h header now defines a macro (at least on
current implementations) which converts a 32-bit pointer to its 64-bit
equivalent,
- Change the MI code to utilise the above two items in all the right places,
- Implement netbsd32___sigaction_sigtramp().

Tested on Sparc64 by Matt Green.

Add kernel support for having userland provide the signal trampoline:

* struct sigacts gets a new sigact_sigdesc structure, which has the
sigaction and the trampoline/version. Version 0 means "legacy kernel
provided trampoline". Other versions are coordinated with machine-
dependent code in libc.
* sigaction1() grows two more arguments -- the trampoline pointer and
the trampoline version.
* A new __sigaction_sigtramp() system call is provided to register a
trampoline along with a signal handler.
* The handler is no longer passed to sensig() functions. Instead,
sendsig() looks up the handler by peeking in the sigacts for the
process getting the signal (since it has to look in there for the
trampoline anyway).
* Native sendsig() functions now select the appropriate trampoline and
its arguments based on the trampoline version in the sigacts.

Changes to libc to use the new facility will be checked in later. Kernel
version not bumped; we will ride the 1.6C bump made recently.

branches: 1.8.8;
clean up

move sparc specific ioctl handling (fb & openprom) into arch/sparc64.

branches: 1.6.2; 1.6.8;
Sync with native emul: rename sc_tstate to sc_psr.

branches: 1.5.6;
Update 32-bit sigcontext structures.

branches: 1.4.2;
Update to post 1.4.

branches: 1.3.8;
COMPAT_SPARC32 -> COMPAT_NETBSD32

clean and up make compile

move sparc32 MD bits here.