many fixes for native GCC 12 builds

- default to dwarf4 since out ctf tools fail with dwarf5. i tried to
do this via subtarget options as other ports do, but this would
require adjusting several of the targets non-netbsd code, and ideally
we'll fix our tools sooner than later, so just hack it here for now.
- catch up config/rs6000/netbsd64.h (mostly delete things)
- remove some more upstream diffs in config/vax, though it does not work
currently - libc.so link fails due to weird relocations.
- include some headers to ensure types are available
- add missing sanitizer netbsd files to the 'dist' tree
- remove no longer present TIOCRCVFRAME and TIOCXMTFRAME interceptors
- expanding the sanitizer OS/cpu defs to cover more netbsd platforms
- copy across a few minor changes from gcc.old's sanitizer's (eg,
disabling linux-specific code, adding netbsd specific code.)
- add (untested, but building) tsan support for arm64
- re-enable the sanitzers, at least simple -fsanitize=address builds a
working application on amd64 now
- fix the source lists (mostly .cc -> .cpp rename here)
- add some missing new defines, -f*, and -W*
- bump sanitizer shlib version
- apply -fno-jump-tables in some more places on m68k
- update the list in README.gcc12 to note many things now work or a few
things to do not work (although there are many uncommited changes at
this point across the rest of 'src' and 'xsrc'.) main points are that
vax, hppa, ppc, and sh3 don't build yet, but most other things are
either testing and working or at least building.

make this actually be GCC 12.3.0's libsanitizer.

the libsanitizer we used with GCC 9 and GCC 10 was significantly
ahead of the GCC 9 and GCC 10 provided versions.

initial merge of GCC 12.3.0.

this doesn't include any of the changes to the .c -> .cc files renamed,
and reverts our local changes to the vax port and libsanitizer subdir.
vax GCC was rewritten and our local fixes no longer are relevant, and
the new libsanitizer is more updated than our old one, and merging via
gcc10->gcc12 is not really possible.

unfortunately, our local changes to libsanitizer that aren't related
to the general update of those sources (ie, the netbsd code) will need
to be re-checked and perhaps re-ported.

ppp: remove ioctls that never worked and crash the kernel

Remove vestigial bits of PPP HDLC support that never worked on netbsd.
The TIOCRCVFRAME ioctl was apparently intended to be called only from
within the kernel, but nothing prevents user code from calling this ioctl
and crashing the kernel.

Reported-by: syzbot+53e4620d0d17a4dd08fa@syzkaller.appspotmail.com
Reported-by: syzbot+d3a8b784fed1e32e0768@syzkaller.appspotmail.com
Reported-by: syzbot+375bab63345a6a7a3331@syzkaller.appspotmail.com
Reported-by: syzbot+ba7ac85196274a20b54a@syzkaller.appspotmail.com
Reported-by: syzbot+57ddb63a3d1d3299ef18@syzkaller.appspotmail.com

branches: 1.7.2;
fix the remaining vestiges of __sigaction14; now the tsan signal tests work.

revert sanitizer back to the version we were using with GCC 9, since
that one was already newer than the GCC 10 version.

initial merge of GCC 10.3.0.

these three files are not yet finished merging:

gcc/config/rs6000/rs6000.c
libsanitizer/lsan/lsan_allocator.h
libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h

our current GCC 9 sanitizers are newer than GCC 10's still, so that
may take a little to untease, so it's probable that more than
these 2 will need more changes.

rs6000.c has some changes related to ABI and supported functionality
that need to be merged forward.

Sync interceptors of sanitizers with LLVM rev. 00460ae520

Use the 2020-09-10 snapshot to replace two-years-old GCC9 copy of
interceptors.

With this change, ASan works with the locally patched GCC tree (as there
were IOCTL operations not properly defined).

merge GCC 9.3.0.

branches: 1.2.4;
- update README.gcc8 to include current status
- netbsd/arm64 uses 64 byte malloc alignment
- make lsan compile on sparc*, mips*, ppc and arm64 again
- add missing sparc, alpha and i386 abi compat for struct __sanitizer_addrinfo
- avoid linux includes on arm64
- avoid multiply defined __ubsan_handle_cfi_bad_type when UBSAN_CAN_USE_CXXABI
isn't defined, and, undefine it
- bad_array_length.cc and bad_array_new.cc lose special build rules
- regen arm64 mknative

branches: 1.1.1;
Initial revision

make this actually be GCC 12.3.0's libsanitizer.

the libsanitizer we used with GCC 9 and GCC 10 was significantly
ahead of the GCC 9 and GCC 10 provided versions.

initial merge of GCC 12.3.0.

this doesn't include any of the changes to the .c -> .cc files renamed,
and reverts our local changes to the vax port and libsanitizer subdir.
vax GCC was rewritten and our local fixes no longer are relevant, and
the new libsanitizer is more updated than our old one, and merging via
gcc10->gcc12 is not really possible.

unfortunately, our local changes to libsanitizer that aren't related
to the general update of those sources (ie, the netbsd code) will need
to be re-checked and perhaps re-ported.

ppp: remove ioctls that never worked and crash the kernel

Remove vestigial bits of PPP HDLC support that never worked on netbsd.
The TIOCRCVFRAME ioctl was apparently intended to be called only from
within the kernel, but nothing prevents user code from calling this ioctl
and crashing the kernel.

Reported-by: syzbot+53e4620d0d17a4dd08fa@syzkaller.appspotmail.com
Reported-by: syzbot+d3a8b784fed1e32e0768@syzkaller.appspotmail.com
Reported-by: syzbot+375bab63345a6a7a3331@syzkaller.appspotmail.com
Reported-by: syzbot+ba7ac85196274a20b54a@syzkaller.appspotmail.com
Reported-by: syzbot+57ddb63a3d1d3299ef18@syzkaller.appspotmail.com

branches: 1.7.2;
fix the remaining vestiges of __sigaction14; now the tsan signal tests work.

revert sanitizer back to the version we were using with GCC 9, since
that one was already newer than the GCC 10 version.

initial merge of GCC 10.3.0.

these three files are not yet finished merging:

gcc/config/rs6000/rs6000.c
libsanitizer/lsan/lsan_allocator.h
libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h

our current GCC 9 sanitizers are newer than GCC 10's still, so that
may take a little to untease, so it's probable that more than
these 2 will need more changes.

rs6000.c has some changes related to ABI and supported functionality
that need to be merged forward.

Sync interceptors of sanitizers with LLVM rev. 00460ae520

Use the 2020-09-10 snapshot to replace two-years-old GCC9 copy of
interceptors.

With this change, ASan works with the locally patched GCC tree (as there
were IOCTL operations not properly defined).

merge GCC 9.3.0.

branches: 1.2.4;
- update README.gcc8 to include current status
- netbsd/arm64 uses 64 byte malloc alignment
- make lsan compile on sparc*, mips*, ppc and arm64 again
- add missing sparc, alpha and i386 abi compat for struct __sanitizer_addrinfo
- avoid linux includes on arm64
- avoid multiply defined __ubsan_handle_cfi_bad_type when UBSAN_CAN_USE_CXXABI
isn't defined, and, undefine it
- bad_array_length.cc and bad_array_new.cc lose special build rules
- regen arm64 mknative

branches: 1.1.1;
Initial revision

initial merge of GCC 12.3.0.

this doesn't include any of the changes to the .c -> .cc files renamed,
and reverts our local changes to the vax port and libsanitizer subdir.
vax GCC was rewritten and our local fixes no longer are relevant, and
the new libsanitizer is more updated than our old one, and merging via
gcc10->gcc12 is not really possible.

unfortunately, our local changes to libsanitizer that aren't related
to the general update of those sources (ie, the netbsd code) will need
to be re-checked and perhaps re-ported.

ppp: remove ioctls that never worked and crash the kernel

Remove vestigial bits of PPP HDLC support that never worked on netbsd.
The TIOCRCVFRAME ioctl was apparently intended to be called only from
within the kernel, but nothing prevents user code from calling this ioctl
and crashing the kernel.

Reported-by: syzbot+53e4620d0d17a4dd08fa@syzkaller.appspotmail.com
Reported-by: syzbot+d3a8b784fed1e32e0768@syzkaller.appspotmail.com
Reported-by: syzbot+375bab63345a6a7a3331@syzkaller.appspotmail.com
Reported-by: syzbot+ba7ac85196274a20b54a@syzkaller.appspotmail.com
Reported-by: syzbot+57ddb63a3d1d3299ef18@syzkaller.appspotmail.com

branches: 1.7.2;
fix the remaining vestiges of __sigaction14; now the tsan signal tests work.

revert sanitizer back to the version we were using with GCC 9, since
that one was already newer than the GCC 10 version.

initial merge of GCC 10.3.0.

these three files are not yet finished merging:

gcc/config/rs6000/rs6000.c
libsanitizer/lsan/lsan_allocator.h
libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h

our current GCC 9 sanitizers are newer than GCC 10's still, so that
may take a little to untease, so it's probable that more than
these 2 will need more changes.

rs6000.c has some changes related to ABI and supported functionality
that need to be merged forward.

Sync interceptors of sanitizers with LLVM rev. 00460ae520

Use the 2020-09-10 snapshot to replace two-years-old GCC9 copy of
interceptors.

With this change, ASan works with the locally patched GCC tree (as there
were IOCTL operations not properly defined).

merge GCC 9.3.0.

branches: 1.2.4;
- update README.gcc8 to include current status
- netbsd/arm64 uses 64 byte malloc alignment
- make lsan compile on sparc*, mips*, ppc and arm64 again
- add missing sparc, alpha and i386 abi compat for struct __sanitizer_addrinfo
- avoid linux includes on arm64
- avoid multiply defined __ubsan_handle_cfi_bad_type when UBSAN_CAN_USE_CXXABI
isn't defined, and, undefine it
- bad_array_length.cc and bad_array_new.cc lose special build rules
- regen arm64 mknative

branches: 1.1.1;
Initial revision

ppp: remove ioctls that never worked and crash the kernel

Remove vestigial bits of PPP HDLC support that never worked on netbsd.
The TIOCRCVFRAME ioctl was apparently intended to be called only from
within the kernel, but nothing prevents user code from calling this ioctl
and crashing the kernel.

Reported-by: syzbot+53e4620d0d17a4dd08fa@syzkaller.appspotmail.com
Reported-by: syzbot+d3a8b784fed1e32e0768@syzkaller.appspotmail.com
Reported-by: syzbot+375bab63345a6a7a3331@syzkaller.appspotmail.com
Reported-by: syzbot+ba7ac85196274a20b54a@syzkaller.appspotmail.com
Reported-by: syzbot+57ddb63a3d1d3299ef18@syzkaller.appspotmail.com

branches: 1.7.2;
fix the remaining vestiges of __sigaction14; now the tsan signal tests work.

revert sanitizer back to the version we were using with GCC 9, since
that one was already newer than the GCC 10 version.

initial merge of GCC 10.3.0.

these three files are not yet finished merging:

gcc/config/rs6000/rs6000.c
libsanitizer/lsan/lsan_allocator.h
libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h

our current GCC 9 sanitizers are newer than GCC 10's still, so that
may take a little to untease, so it's probable that more than
these 2 will need more changes.

rs6000.c has some changes related to ABI and supported functionality
that need to be merged forward.

Sync interceptors of sanitizers with LLVM rev. 00460ae520

Use the 2020-09-10 snapshot to replace two-years-old GCC9 copy of
interceptors.

With this change, ASan works with the locally patched GCC tree (as there
were IOCTL operations not properly defined).

merge GCC 9.3.0.

branches: 1.2.4;
- update README.gcc8 to include current status
- netbsd/arm64 uses 64 byte malloc alignment
- make lsan compile on sparc*, mips*, ppc and arm64 again
- add missing sparc, alpha and i386 abi compat for struct __sanitizer_addrinfo
- avoid linux includes on arm64
- avoid multiply defined __ubsan_handle_cfi_bad_type when UBSAN_CAN_USE_CXXABI
isn't defined, and, undefine it
- bad_array_length.cc and bad_array_new.cc lose special build rules
- regen arm64 mknative

branches: 1.1.1;
Initial revision

fix the remaining vestiges of __sigaction14; now the tsan signal tests work.

revert sanitizer back to the version we were using with GCC 9, since
that one was already newer than the GCC 10 version.

initial merge of GCC 10.3.0.

these three files are not yet finished merging:

gcc/config/rs6000/rs6000.c
libsanitizer/lsan/lsan_allocator.h
libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h

our current GCC 9 sanitizers are newer than GCC 10's still, so that
may take a little to untease, so it's probable that more than
these 2 will need more changes.

rs6000.c has some changes related to ABI and supported functionality
that need to be merged forward.

Sync interceptors of sanitizers with LLVM rev. 00460ae520

Use the 2020-09-10 snapshot to replace two-years-old GCC9 copy of
interceptors.

With this change, ASan works with the locally patched GCC tree (as there
were IOCTL operations not properly defined).

merge GCC 9.3.0.

branches: 1.2.4;
- update README.gcc8 to include current status
- netbsd/arm64 uses 64 byte malloc alignment
- make lsan compile on sparc*, mips*, ppc and arm64 again
- add missing sparc, alpha and i386 abi compat for struct __sanitizer_addrinfo
- avoid linux includes on arm64
- avoid multiply defined __ubsan_handle_cfi_bad_type when UBSAN_CAN_USE_CXXABI
isn't defined, and, undefine it
- bad_array_length.cc and bad_array_new.cc lose special build rules
- regen arm64 mknative

branches: 1.1.1;
Initial revision

revert sanitizer back to the version we were using with GCC 9, since
that one was already newer than the GCC 10 version.

initial merge of GCC 10.3.0.

these three files are not yet finished merging:

gcc/config/rs6000/rs6000.c
libsanitizer/lsan/lsan_allocator.h
libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h

our current GCC 9 sanitizers are newer than GCC 10's still, so that
may take a little to untease, so it's probable that more than
these 2 will need more changes.

rs6000.c has some changes related to ABI and supported functionality
that need to be merged forward.

Sync interceptors of sanitizers with LLVM rev. 00460ae520

Use the 2020-09-10 snapshot to replace two-years-old GCC9 copy of
interceptors.

With this change, ASan works with the locally patched GCC tree (as there
were IOCTL operations not properly defined).

merge GCC 9.3.0.

branches: 1.2.4;
- update README.gcc8 to include current status
- netbsd/arm64 uses 64 byte malloc alignment
- make lsan compile on sparc*, mips*, ppc and arm64 again
- add missing sparc, alpha and i386 abi compat for struct __sanitizer_addrinfo
- avoid linux includes on arm64
- avoid multiply defined __ubsan_handle_cfi_bad_type when UBSAN_CAN_USE_CXXABI
isn't defined, and, undefine it
- bad_array_length.cc and bad_array_new.cc lose special build rules
- regen arm64 mknative

branches: 1.1.1;
Initial revision

initial merge of GCC 10.3.0.

these three files are not yet finished merging:

gcc/config/rs6000/rs6000.c
libsanitizer/lsan/lsan_allocator.h
libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h

our current GCC 9 sanitizers are newer than GCC 10's still, so that
may take a little to untease, so it's probable that more than
these 2 will need more changes.

rs6000.c has some changes related to ABI and supported functionality
that need to be merged forward.

Sync interceptors of sanitizers with LLVM rev. 00460ae520

Use the 2020-09-10 snapshot to replace two-years-old GCC9 copy of
interceptors.

With this change, ASan works with the locally patched GCC tree (as there
were IOCTL operations not properly defined).

merge GCC 9.3.0.

branches: 1.2.4;
- update README.gcc8 to include current status
- netbsd/arm64 uses 64 byte malloc alignment
- make lsan compile on sparc*, mips*, ppc and arm64 again
- add missing sparc, alpha and i386 abi compat for struct __sanitizer_addrinfo
- avoid linux includes on arm64
- avoid multiply defined __ubsan_handle_cfi_bad_type when UBSAN_CAN_USE_CXXABI
isn't defined, and, undefine it
- bad_array_length.cc and bad_array_new.cc lose special build rules
- regen arm64 mknative

branches: 1.1.1;
Initial revision