sys: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl s

sys: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

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sys: Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

Stop adding -Wredundant-decls to CWARNFLAGS.

clang doesn't implement it, and Linux doesn't enforce it. As a
result, new instances keep cropping up both in FreeBSD's code and in
upstream sources fro

Stop adding -Wredundant-decls to CWARNFLAGS.

clang doesn't implement it, and Linux doesn't enforce it. As a
result, new instances keep cropping up both in FreeBSD's code and in
upstream sources from vendors.

Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D34144

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Remove tests for obsolete compilers in the build system

Assume gcc is at least 6.4, the oldest xtoolchain in the ports tree.
Assume clang is at least 6, which was in 11.2-RELEASE. Drop conditions
f

Remove tests for obsolete compilers in the build system

Assume gcc is at least 6.4, the oldest xtoolchain in the ports tree.
Assume clang is at least 6, which was in 11.2-RELEASE. Drop conditions
for older compilers.

Reviewed by: imp (earlier version), emaste, jhb
MFC after: 2 weeks
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D24802

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Merge ^/head r357119 through r357178.

Compile hack.c with normal CFLAGS + -shared -nostdlib.

Originally, hack.c was compiled into a shard object with just -shared
-nostdlib. This assumed that ${CC} did not require any additional
flags

Compile hack.c with normal CFLAGS + -shared -nostdlib.

Originally, hack.c was compiled into a shard object with just -shared
-nostdlib. This assumed that ${CC} did not require any additional
flags for ABIs, cross-building, etc.

When kern.post.mk was created in r89509 by reducing duplication in
kernel Makefile.<arch> files, the -shared flag was moved into a
HACK_EXTRA_FLAGS variable so that sparc64 could override it with
-Wl,-shared. The sparc64 hack was removed in r111650, but
HACK_EXTRA_FLAGS was left in place. Over time, we have started
support toolchains that require flags to support alternate ABIs on
MIPS and PowerPC and started (ab)using HACK_EXTRA_FLAGS to set only
those flags.

I need to fix risc-v to pass -mno-relax to the hack.c build for lld in
llvm 10, and the patches to support cross-build from non-FreeBSD hosts
need to include -target for clang in CFLAGS for hack.c. Rather than
adding more hacks into HACK_EXTRA_FLAGS, just use the full set of
CFLAGS with hack.c.

Reviewed by: kib, arichardson
MFC after: 1 month
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D23362

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[PowerPC] Clang powerpcspe build fixes

* Fix a couple of format errors.
* Add some extra compiler flags needed to force clang to build SPE code.
(These are temporary until the target triple is fix

[PowerPC] Clang powerpcspe build fixes

* Fix a couple of format errors.
* Add some extra compiler flags needed to force clang to build SPE code.
(These are temporary until the target triple is fixed)

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Add support for building Book-E kernels with clang/lld.

This involved several changes:

* Since lld does not like text relocations, replace SMP boot page text relocs
in booke/locore.S with position-

Add support for building Book-E kernels with clang/lld.

This involved several changes:

* Since lld does not like text relocations, replace SMP boot page text relocs
in booke/locore.S with position-independent math, and track the virtual base
in the SMP boot page header.

* As some SPRs are interpreted differently on clang due to the way it handles
platform-specific SPRs, switch m*dear and m*esr mnemonics out for regular
m*spr. Add both forms of SPR_DEAR to spr.h so the correct encoding is selected.

* Change some hardcoded 32 bit things in the boot page to be pointer-sized, and
fix alignment.

* Fix 64-bit build of booke/pmap.c when enabling pmap debugging.

Additionally, I took the opportunity to document how the SMP boot page works.

Approved by: jhibbits (mentor)
Differential Revision: https://reviews.freebsd.org/D21999

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Revert r336353 completely based on protest; compatibility shims incoming

Revert 336358 and step away fron machine for the day...

VERSREQ < 7.+ physically will not work with new config(8) due to major bump,
which is why I bumped it in the first place... Back to the origin

Revert 336358 and step away fron machine for the day...

VERSREQ < 7.+ physically will not work with new config(8) due to major bump,
which is why I bumped it in the first place... Back to the original version

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Partially revert r336353: sys/conf/* %VERSREQ bumps

The changes made in r335998 don't strictly require a newer config(8),
though it is advised. The %VERSREQ bumps were premature.

config(8): Bump major version after r335998

config-generated hints.c/env.c from r335998 and later are incompatible with
earlier kernels due to no longer setting envmode/hintmode. A minor bump for
th

config(8): Bump major version after r335998

config-generated hints.c/env.c from r335998 and later are incompatible with
earlier kernels due to no longer setting envmode/hintmode. A minor bump for
this is insufficient, as matching major version with a later minor version
is still viewed as backwards-compatible.

This was an MI kernel change, soo all VERSREQ's are bumped.

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MFhead@r313243

Merge ^/head r312309 through r312623.

Don't pass -Wa,-many through clang, the integrated as doesn't support it.

Our base binutils sets -many by default anyway, but external gcc may not do
this.

PR: kern/215948
Submitted by: Mark Millar

Don't pass -Wa,-many through clang, the integrated as doesn't support it.

Our base binutils sets -many by default anyway, but external gcc may not do
this.

PR: kern/215948
Submitted by: Mark Millard <markmi AT dsl-only DOT net>
Reported by: Mark Millard
MFC after: 2 weeks

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Merge ^/head r307736 through r308146.

Create a new MACHINE_ARCH for Freescale PowerPC e500v2

Summary:
The Freescale e500v2 PowerPC core does not use a standard FPU.
Instead, it uses a Signal Processing Engine (SPE)--a DSP-style vector p

Create a new MACHINE_ARCH for Freescale PowerPC e500v2

Summary:
The Freescale e500v2 PowerPC core does not use a standard FPU.
Instead, it uses a Signal Processing Engine (SPE)--a DSP-style vector processor
unit, which doubles as a FPU. The PowerPC SPE ABI is incompatible with the
stock powerpc ABI, so a new MACHINE_ARCH was created to deal with this.
Additionaly, the SPE opcodes overlap with Altivec, so these are mutually
exclusive. Taking advantage of this fact, a new file, powerpc/booke/spe.c, was
created with the same function set as in powerpc/powerpc/altivec.c, so it
becomes effectively a drop-in replacement. setjmp/longjmp were modified to save
the upper 32-bits of the now-64-bit GPRs (upper 32-bits are only accessible by
the SPE).

Note: This does _not_ support the SPE in the e500v1, as the e500v1 SPE does not
support double-precision floating point.

Also, without a new MACHINE_ARCH it would be impossible to provide binary
packages which utilize the SPE.

Additionally, no work has been done to support ports, work is needed for this.
This also means no newer gcc can yet be used. However, gcc's powerpc support
has been refactored which would make adding a powerpcspe-freebsd target very
easy.

Test Plan:
This was lightly tested on a RouterBoard RB800 and an AmigaOne A1222
(P1022-based) board, compiled against the new ABI. Base system utilities
(/bin/sh, /bin/ls, etc) still function appropriately, the system is able to boot
multiuser.

Reviewed By: bdrewery, imp
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D5683

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Merge sync of head

MFH: r278968-r280640

Sponsored by: The FreeBSD Foundation

Merge r278538 through r280226.

Merge from head

Merging ^/head r279596 through r279758.

Make 32-bit PowerPC kernels, like 64-bit PowerPC kernels, position-independent
executables. The goal here, not yet accomplished, is to let the e500 kernel
run under QEMU by setting KERNBASE to someth

Make 32-bit PowerPC kernels, like 64-bit PowerPC kernels, position-independent
executables. The goal here, not yet accomplished, is to let the e500 kernel
run under QEMU by setting KERNBASE to something that fits in low memory and
then having the kernel relocate itself at runtime.

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Merge from HEAD

Merge ^/head r277975 through r277998.