Implement userspace gettimeofday(2) with HPET timecounter.

Right now, userspace (fast) gettimeofday(2) on x86 only works for
RDTSC. For older machines, like Core2, where RDTSC is not C2/C3
invarian

Implement userspace gettimeofday(2) with HPET timecounter.

Right now, userspace (fast) gettimeofday(2) on x86 only works for
RDTSC. For older machines, like Core2, where RDTSC is not C2/C3
invariant, and which fall to HPET hardware, this means that the call
has both the penalty of the syscall and of the uncached hw behind the
QPI or PCIe connection to the sought bridge. Nothing can me done
against the access latency, but the syscall overhead can be removed.
System already provides mappable /dev/hpetX devices, which gives
straight access to the HPET registers page.

Add yet another algorithm to the x86 'vdso' timehands. Libc is updated
to handle both RDTSC and HPET. For HPET, the index of the hpet device
to mmap is passed from kernel to userspace, index might be changed and
libc invalidates its mapping as needed.

Remove cpu_fill_vdso_timehands() KPI, instead require that
timecounters which can be used from userspace, to provide
tc_fill_vdso_timehands{,32}() methods. Merge i386 and amd64
libc/<arch>/sys/__vdso_gettc.c into one source file in the new
libc/x86/sys location. __vdso_gettc() internal interface is changed
to move timecounter algorithm detection into the MD code.

Measurements show that RDTSC even with the syscall overhead is faster
than userspace HPET access. But still, userspace HPET is three-four
times faster than syscall HPET on several Core2 and SandyBridge
machines.

Tested by: Howard Su <howard0su@gmail.com>
Sponsored by: The FreeBSD Foundation
MFC after: 1 month
Differential revision: https://reviews.freebsd.org/D7473

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Make armv6 hard float abi by default. Kill armv6hf.
Allow CPUTYPE=soft to build the current soft-float abi libraries.
Add UPDATING entry to announce this.

Approved by: re@ (gjb)

Merge the projects/release-pkg branch to head.

This allows packaging the base system with pkg(8), including
but not limited to providing the ability to provide upstream
binary update possibilities f

Merge the projects/release-pkg branch to head.

This allows packaging the base system with pkg(8), including
but not limited to providing the ability to provide upstream
binary update possibilities for non-tier-1 architectures.

This merge is a requirement of the 11.0-RELEASE, and as such,
thank you to everyone that has tested the project branch.

Documentation in build(7) etc. is still somewhat sparse, but
updates to those parts will follow.

Sponsored by: The FreeBSD Foundation

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MFH

Sponsored by: The FreeBSD Foundation

WITHOUT_TOOLCHAIN: Fix build of rtld.

MK_TOOLCHAIN==no disables building and installing of pic archives.
c_pic.a is still needed for rtld though so force it to build in lib/libc
and link directly to

WITHOUT_TOOLCHAIN: Fix build of rtld.

MK_TOOLCHAIN==no disables building and installing of pic archives.
c_pic.a is still needed for rtld though so force it to build in lib/libc
and link directly to the objdir version of it for rtld.

Somehow this has been broken since r148725.

Sponsored by: EMC / Isilon Storage Division

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Remove libc, librtld_db, libthr packages, and further increase
the constraints on what needs to be installed in a specific to
maintain consistency during upgrades.

Create a new clibs package contain

Remove libc, librtld_db, libthr packages, and further increase
the constraints on what needs to be installed in a specific to
maintain consistency during upgrades.

Create a new clibs package containing libraries that are needed
as a bare minimum for consistency.

With much help and input from: kib
Sponsored by: The FreeBSD Foundation

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First pass through library packaging.

Sponsored by: The FreeBSD Foundation

MfH @r295202

Expect to see panics in routing code at least now.

Merge ^/head r294777 through r294960.

MFH

Sponsored by: The FreeBSD Foundation

Remove excess whitespace

Merge ^/head r294599 through r294776.

Replace .CURDIR with SRCTOP to respect LIBC_SRCTOP feature.

Merge ^/head r294169 through r294598.

MFH @r294567

MFH

Sponsored by: The FreeBSD Foundation

Fix compilation on MIPS (typo introduced in r294227).

Bring in initial libc and libstand support for RISC-V.

Reviewed by: andrew, emaste, kib
Sponsored by: DARPA, AFRL
Sponsored by: HEIF5
Differential Revision: https://reviews.freebsd.org/D4943

MFH r289384-r293170

Sponsored by: The FreeBSD Foundation

Mfh r292839

Make libxnet.so a symlink to libc.so. This makes `-lxnet` a no-op, as
POSIX requires for the c99 compiler.

(In fact, our c99(1) already ignores -lxnet; but our make(1) doesn't set
${CC} correctly,

Make libxnet.so a symlink to libc.so. This makes `-lxnet` a no-op, as
POSIX requires for the c99 compiler.

(In fact, our c99(1) already ignores -lxnet; but our make(1) doesn't set
${CC} correctly, and our cc(1) treats xnet like any other library.)

Reviewed by: kib

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Merge from head

Sponsored by: Gandi.net

Finish merging from head, messed up in previous attempt

Merge r286744-r287584 from head.

Merge from HEAD