MFC r344120:
Unify i386 and amd64 getcontextx.c, and use ifuncs while there.

This is yet another attempt of the merge, previously done as r344436 and
reverted in r344463. It is redone since ld was

MFC r344120:
Unify i386 and amd64 getcontextx.c, and use ifuncs while there.

This is yet another attempt of the merge, previously done as r344436 and
reverted in r344463. It is redone since ld was changed to ifunc-capable
linker on i386.

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Revert r344436, which was the merge of r344120.

Currently stable/12 i386 installs old ld.bfd as ld (WITHOUT_LLD_IS_LD),
which prevents ifunc relocations from working properly. If a static
binary is

Revert r344436, which was the merge of r344120.

Currently stable/12 i386 installs old ld.bfd as ld (WITHOUT_LLD_IS_LD),
which prevents ifunc relocations from working properly. If a static
binary is linked, then it looses libc relocations needed.

The stable i386 branch uses ld.lld for the world build (WITH_LLD_BOOTSTRAP),
which is why static binaries from the base do not have the issue.

Reported and diagnosted by: antoine

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MFC r344120:
Unify i386 and amd64 getcontextx.c, and use ifuncs while there.

Move libc linker ifunc test to build target only

Targets like 'cleandir' must not depend on toolchain capabilities.

Reported by: delphij, Shawn Webb
Approved by: re (kib)
Sponsored by: The FreeBSD

Move libc linker ifunc test to build target only

Targets like 'cleandir' must not depend on toolchain capabilities.

Reported by: delphij, Shawn Webb
Approved by: re (kib)
Sponsored by: The FreeBSD Foundation

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libc: require ifunc-capable linker for amd64/i386

We expect to introduce optimized libc routines in the near future,
which requires use of a linker that supports ifuncs.

Approved by: re (gjb, kib)

libc: require ifunc-capable linker for amd64/i386

We expect to introduce optimized libc routines in the near future,
which requires use of a linker that supports ifuncs.

Approved by: re (gjb, kib)
Sponsored by: The FreeBSD Foundation

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Strip __RCSID() and __SCCSID() strings by default when building libc.

This is in preparation for changes to update the various ID strings in
libc's source. CSRG ID strings will use __SCCSID() and t

Strip __RCSID() and __SCCSID() strings by default when building libc.

This is in preparation for changes to update the various ID strings in
libc's source. CSRG ID strings will use __SCCSID() and there are some
existing uses of __RCSID() for NetBSD ID strings already. These are
generally under either an explicit #if 0 or an #ifdef LIBC_SCCS so are
off by default and this change preserves that existing behavior.

Differential Revision: https://reviews.freebsd.org/D15830

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Now that a special no-SSP libc is used for rtld, allow
-fstack-protector-all for normal libc builds.

Submitted by: Luis Pires
Reviewed by: brooks
Differential revision: https://reviews.freebsd.org/D

Now that a special no-SSP libc is used for rtld, allow
-fstack-protector-all for normal libc builds.

Submitted by: Luis Pires
Reviewed by: brooks
Differential revision: https://reviews.freebsd.org/D15340

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Created static libc PIC/no-SSP library to be used by rtld.

Rtld is not compatible with SSP, and since we link libc_pic.a to rtld
to have the basic support like memory and string copy functions, we
h

Created static libc PIC/no-SSP library to be used by rtld.

Rtld is not compatible with SSP, and since we link libc_pic.a to rtld
to have the basic support like memory and string copy functions, we
have to both carefully limit libc use, and to provide the ssp support
shims. This change makes the libc use in rtld more straighforward but
still limited, and allows to remove the shims, to be done in the next
commit.

Submitted by: Luis Pires
Reviewed by: bdrewery, brooks
Differential revision: https://reviews.freebsd.org/D15283

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Support armv7 builds for userland

Make armv7 as a new MACHINE_ARCH.

Copy all the places we do armv6 and add armv7 as basically an
alias. clang appears to generate code for armv7 by default. armv7 h

Support armv7 builds for userland

Make armv7 as a new MACHINE_ARCH.

Copy all the places we do armv6 and add armv7 as basically an
alias. clang appears to generate code for armv7 by default. armv7 hard
float isn't supported by the the in-tree gcc, so it hasn't been
updated to have a new default.

Support armv7 as a new valid MACHINE_ARCH (and by extension
TARGET_ARCH).

Add armv7 to the universe build.

Differential Revision: https://reviews.freebsd.org/D12010

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Add HAS_TESTS to all Makefiles that are currently using the
`SUBDIR.${MK_TESTS}+= tests` idiom.

This is a follow up to r321912.

Convert traditional ${MK_TESTS} conditional idiom for including test
directories to SUBDIR.${MK_TESTS} idiom

This is being done to pave the way for future work (and homogenity) in
^/projects/make-ch

Convert traditional ${MK_TESTS} conditional idiom for including test
directories to SUBDIR.${MK_TESTS} idiom

This is being done to pave the way for future work (and homogenity) in
^/projects/make-check-sandbox .

No functional change intended.

MFC after: 1 weeks

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Replace dot-dot relative pathing with SRCTOP-relative paths where possible

This reduces build output, need for recalculating paths, and makes it clearer
which paths are relative to what areas in the

Replace dot-dot relative pathing with SRCTOP-relative paths where possible

This reduces build output, need for recalculating paths, and makes it clearer
which paths are relative to what areas in the source tree. The change in
performance over a locally mounted UFS filesystem was negligible in my testing,
but this may more positively impact other filesystems like NFS.

LIBC_SRCTOP was left alone so Juniper (and other users) can continue to
manipulate lib/libc/Makefile (and other Makefile.inc's under lib/libc) as
include Makefiles with custom options.

Discussed with: marcel, sjg
MFC after: 1 week
Reviewed by: emaste
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D9207

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Add full softfloat and hardfloat support for RISC-V.

Hardfloat is now default (use riscv64sf as TARGET_ARCH
for softfloat).

Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.

Add full softfloat and hardfloat support for RISC-V.

Hardfloat is now default (use riscv64sf as TARGET_ARCH
for softfloat).

Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D8529

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Add full softfloat and hardfloat support for MIPS.

This adds new target architectures for hardfloat:
mipselhf mipshf mips64elhf mips64hf.

Tested in QEMU only.

Sponsored by: DARPA, AFRL
Sponsored b

Add full softfloat and hardfloat support for MIPS.

This adds new target architectures for hardfloat:
mipselhf mipshf mips64elhf mips64hf.

Tested in QEMU only.

Sponsored by: DARPA, AFRL
Sponsored by: HEIF5
Differential Revision: https://reviews.freebsd.org/D8376

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Add different libc ldscript: the one without libssp --
we don't have it when MK_SSP==no.

This fixes compilation on MIPS.

Reviewed by: imp
Sponsored by: DARPA, AFRL
Sponsored by: HEIF5
Differential

Add different libc ldscript: the one without libssp --
we don't have it when MK_SSP==no.

This fixes compilation on MIPS.

Reviewed by: imp
Sponsored by: DARPA, AFRL
Sponsored by: HEIF5
Differential Revision: https://reviews.freebsd.org/D8212

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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 <[email protected]>
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)

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

Remove excess whitespace

Replace .CURDIR with SRCTOP to respect LIBC_SRCTOP feature.

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

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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