Merge ^/head r283771 through r283870.

We only support the ARM EABI in head, remove the check on __ARM_EABI__.

MFH: r282615-r283655

Sponsored by: The FreeBSD Foundation

Merge sync of head

Mark thumb entry points as such when building for thumb, otherwise mark
them as arm.

Use the Thumb compliant version of the add instruction. We can only use
"add Rd, Rn, Rm" from within an IT (if-then) block.

MFhead @ r277403

Reintegrate head: r274132-r277384

Sponsored by: The FreeBSD Foundation

Reintegrate head revisions r273096-r277147

Sponsored by: The FreeBSD Foundation

Fix alignment directives in arm asm code after clang 3.5 import.

The ancient gas we've been using interprets .align 0 as align to the
minimum required alignment for the current section. Clang's int

Fix alignment directives in arm asm code after clang 3.5 import.

The ancient gas we've been using interprets .align 0 as align to the
minimum required alignment for the current section. Clang's integrated
assembler interprets it as align to a byte boundary. Fortunately both
assemblers interpret a non-zero value as align to 2^N so just make sure
we have appropriate non-zero values everywhere.

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MFhead @ r276594

Define a WFI macro that expands to the right form of wait-for-interrupt
depending on the architecture.

Merge ^/head r274961 through r276301.

Include acle-compat.h directly (we use its symbols) rather than getting
it via sysreg.h.

Add macros for asm barrier instructions with arch-specific implementations.

Create 'L' variants of all the ENTRY macros for file-static/local symbols.

If it seems like this is getting out of hand, I quite agree. I wonder if
it's safe, here in the 21st century, to lose the

Create 'L' variants of all the ENTRY macros for file-static/local symbols.

If it seems like this is getting out of hand, I quite agree. I wonder if
it's safe, here in the 21st century, to lose the distinction between C and
ASM symbols?

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Fix the GLOBAL macro so it works (upper vs lowercase X), use it in _EENTRY.

Stylish changes... put tabs where they need to be in macros, move lines
around so that related things are more grouped together, rewrite comments.

No functional changes, this is all so that the func

Stylish changes... put tabs where they need to be in macros, move lines
around so that related things are more grouped together, rewrite comments.

No functional changes, this is all so that the functional changes in the
next commit will stand out.

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Remove _PROF_PROLOGUE from the EENTRY() macros. These macros define
'extra' entry points which are nested within or provide a synonym name
for another function. It's most likely not safe to be mess

Remove _PROF_PROLOGUE from the EENTRY() macros. These macros define
'extra' entry points which are nested within or provide a synonym name
for another function. It's most likely not safe to be messing with the
IP and LR registers at anything other than the primary entry point to a
function. Anywhere beyond initial function entry, those registers may
be in use as scratch or variable registers.

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MFhead @ r275496

Merge ^/head r274961 through r275386.

Pull in the NetBSD global offset table handling code. Clang 3.5 creates
relocations the linker complains about.

Obtained from: NetBSD
MFC after: 1 Week

Merge ^/head r275262 through r275363.

MFhead @ r275302

Update _ENTRY to use _EENTRY to reduce the common code.