Switch earmv6{,hf}eb to BE8 in kernel side.

My strategy here is to define _ARM_ARCH_BE8 macro in arm/cdefs.h, if
__ARMEB__ && _ARM_ARCH_6.

Use this macro to determine whether system is compiled for and running on
BE8 mode or not.

Note that, for __ARMEB__, some conditions become compile-time constants
determined by _ARM_ARCH_BE8 macro, e.g., whether BE8 or BE32 are accepted
as a userland binary, or unaligned memory access is possible or not.

The ARM C Language Extenstion document defines __ARCH_ARM as the integer
macro indicating the current ARM instruction set. Let's use it.

PR/55778: evbarm64 GENERIC64 kernel fails to build with clang

XXX Handle the fact that for an ARM architecture ARMvX.Y then,
XXX __ARM_ARCH= X * 100 + Y. E.g. for ARMv8.1 __ARM_ARCH = 801.

Define _ARM_ARCH_8 when __ARM_ARCH_8A (no trailing double underscore) as
it is defined by gcc.

__ARM_ARCH_8A__ (with trailing double underscore) seems to be a typo (or
maybe historical)

ARMv6KZ has been misspelled by GCC since forever, but clang only
provides the correct name. Support both.

branches: 1.15.28;
unbreak lint

branches: 1.14.2;
Use sizeof(__int128_t) for aarch64 and sizeof(long long) for ARM EABI

Make all __ALIGNBYTES macros return the same type (size_t)

Fix inverted GCC version test

Add a check for minimum compiler compatible with gcc 4.1
__ARM_PCS_AAPCS64 also requires __ALIGNBYTES to be 7

Deal with __ARM_ARCH_8A__

Add _ARM_ARCH_5T (needed for blx <reg> support)

Add _ARM_ARCH_T2 to indicate Thumb2 support
Don't define _ARM_ARCH_DWORD_OK disappear if compiling for Thumb1

branches: 1.7.2; 1.7.4;
Add a macro for determining whether we can use LDRD/STRD instructions

If we are using EABI (aapcs-linux), then ALIGNBYTES needs to deal with
8-byte long types.

Add more arm7 and arm6 variants.

branches: 1.4.4;
Change CMSG_SPACE and CMSG_LEN to provide Integer Constant Expressions
again. This was changed in sys/socket.h r1.51 to work around fallout
from the IPv6 aux data migration. It broke the historic ABI on some
platforms. This commit restores compatibility for netbsd32 code on such
platforms and provides a template for future changes to the CMSG_*
alignment. Revert PCC/Clang workarounds in postfix and tmux.

branches: 1.3.38; 1.3.54; 1.3.58;
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.

Move _ARM_ARCH_* from asm.h to cdefs.h so everyone can use them.
Add _END/END/ASEND which every port's asm.h should have.
Add GET_CPUFINO(rX). Reserved for future use. :)
Use %foo instead of #foo

branches: 1.1.2; 1.1.44; 1.1.86; 1.1.94; 1.1.100; 1.1.102; 1.1.104; 1.1.106;
Header files which don't differ between arm32 and arm26 and can thus be
shared.

The ARM C Language Extenstion document defines __ARCH_ARM as the integer
macro indicating the current ARM instruction set. Let's use it.

PR/55778: evbarm64 GENERIC64 kernel fails to build with clang

XXX Handle the fact that for an ARM architecture ARMvX.Y then,
XXX __ARM_ARCH= X * 100 + Y. E.g. for ARMv8.1 __ARM_ARCH = 801.

Define _ARM_ARCH_8 when __ARM_ARCH_8A (no trailing double underscore) as
it is defined by gcc.

__ARM_ARCH_8A__ (with trailing double underscore) seems to be a typo (or
maybe historical)

ARMv6KZ has been misspelled by GCC since forever, but clang only
provides the correct name. Support both.

branches: 1.15.28;
unbreak lint

branches: 1.14.2;
Use sizeof(__int128_t) for aarch64 and sizeof(long long) for ARM EABI

Make all __ALIGNBYTES macros return the same type (size_t)

Fix inverted GCC version test

Add a check for minimum compiler compatible with gcc 4.1
__ARM_PCS_AAPCS64 also requires __ALIGNBYTES to be 7

Deal with __ARM_ARCH_8A__

Add _ARM_ARCH_5T (needed for blx <reg> support)

Add _ARM_ARCH_T2 to indicate Thumb2 support
Don't define _ARM_ARCH_DWORD_OK disappear if compiling for Thumb1

branches: 1.7.2; 1.7.4;
Add a macro for determining whether we can use LDRD/STRD instructions

If we are using EABI (aapcs-linux), then ALIGNBYTES needs to deal with
8-byte long types.

Add more arm7 and arm6 variants.

branches: 1.4.4;
Change CMSG_SPACE and CMSG_LEN to provide Integer Constant Expressions
again. This was changed in sys/socket.h r1.51 to work around fallout
from the IPv6 aux data migration. It broke the historic ABI on some
platforms. This commit restores compatibility for netbsd32 code on such
platforms and provides a template for future changes to the CMSG_*
alignment. Revert PCC/Clang workarounds in postfix and tmux.

branches: 1.3.38; 1.3.54; 1.3.58;
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.

Move _ARM_ARCH_* from asm.h to cdefs.h so everyone can use them.
Add _END/END/ASEND which every port's asm.h should have.
Add GET_CPUFINO(rX). Reserved for future use. :)
Use %foo instead of #foo

branches: 1.1.2; 1.1.44; 1.1.86; 1.1.94; 1.1.100; 1.1.102; 1.1.104; 1.1.106;
Header files which don't differ between arm32 and arm26 and can thus be
shared.

Define _ARM_ARCH_8 when __ARM_ARCH_8A (no trailing double underscore) as
it is defined by gcc.

__ARM_ARCH_8A__ (with trailing double underscore) seems to be a typo (or
maybe historical)

ARMv6KZ has been misspelled by GCC since forever, but clang only
provides the correct name. Support both.

branches: 1.15.28;
unbreak lint

branches: 1.14.2;
Use sizeof(__int128_t) for aarch64 and sizeof(long long) for ARM EABI

Make all __ALIGNBYTES macros return the same type (size_t)

Fix inverted GCC version test

Add a check for minimum compiler compatible with gcc 4.1
__ARM_PCS_AAPCS64 also requires __ALIGNBYTES to be 7

Deal with __ARM_ARCH_8A__

Add _ARM_ARCH_5T (needed for blx <reg> support)

Add _ARM_ARCH_T2 to indicate Thumb2 support
Don't define _ARM_ARCH_DWORD_OK disappear if compiling for Thumb1

branches: 1.7.2; 1.7.4;
Add a macro for determining whether we can use LDRD/STRD instructions

If we are using EABI (aapcs-linux), then ALIGNBYTES needs to deal with
8-byte long types.

Add more arm7 and arm6 variants.

branches: 1.4.4;
Change CMSG_SPACE and CMSG_LEN to provide Integer Constant Expressions
again. This was changed in sys/socket.h r1.51 to work around fallout
from the IPv6 aux data migration. It broke the historic ABI on some
platforms. This commit restores compatibility for netbsd32 code on such
platforms and provides a template for future changes to the CMSG_*
alignment. Revert PCC/Clang workarounds in postfix and tmux.

branches: 1.3.38; 1.3.54; 1.3.58;
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.

Move _ARM_ARCH_* from asm.h to cdefs.h so everyone can use them.
Add _END/END/ASEND which every port's asm.h should have.
Add GET_CPUFINO(rX). Reserved for future use. :)
Use %foo instead of #foo

branches: 1.1.2; 1.1.44; 1.1.86; 1.1.94; 1.1.100; 1.1.102; 1.1.104; 1.1.106;
Header files which don't differ between arm32 and arm26 and can thus be
shared.