lib/libsys, lib/libc: export pdwait

Make pdwait(2) cancellable, same as all other wait*(2) syscalls wrappers.

Reviewed by: asomers, markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC aft

lib/libsys, lib/libc: export pdwait

Make pdwait(2) cancellable, same as all other wait*(2) syscalls wrappers.

Reviewed by: asomers, markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D54592

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lib{c,sys}: return wrapped syscall APIs to libc

These provide standard APIs, but are implemented using another system
call (e.g., pipe implemented in terms of pipe2) or are interposed by the
threadi

lib{c,sys}: return wrapped syscall APIs to libc

These provide standard APIs, but are implemented using another system
call (e.g., pipe implemented in terms of pipe2) or are interposed by the
threading library to support cancelation.

After discussion with kib (see D44111), I've concluded that it is
better to keep most public interfaces in libc with as little
as possible in libsys.

Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D44241

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libc: split libc and syscall interposing (2/2)

Move the __libc_interposing implementation to libc/gen so it doesn't end
up in libsys.

Reviewed by: kib, emaste, imp
Pull Request: https://github.com/

libc: split libc and syscall interposing (2/2)

Move the __libc_interposing implementation to libc/gen so it doesn't end
up in libsys.

Reviewed by: kib, emaste, imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/908

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libc: split libc and syscall interposing (1/2)

System calls or their wrappers are now interposed by
__libsys_interposing with purely libc entries remaining in
__libc_interposing.

Use __libsys_inter

libc: split libc and syscall interposing (1/2)

System calls or their wrappers are now interposed by
__libsys_interposing with purely libc entries remaining in
__libc_interposing.

Use __libsys_interposing_slot in libthr to update __libsys_interposing,
but also make __libc_interposing_slot fall back to
__libsys_interposing_slot so an out of date libc has a chance of working
during updates.

Reviewed by: kib, emaste, imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/908

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Add kcmp(2) userspace bits

Unlike Linux, we do provide libc wrapper. All definitions and
prototypes are available from <unistd.h>

Tested by: manu
Reviewed by: brooks, markj
Sponsored by: The Fre

Add kcmp(2) userspace bits

Unlike Linux, we do provide libc wrapper. All definitions and
prototypes are available from <unistd.h>

Tested by: manu
Reviewed by: brooks, markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D43518

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libc: stop exposing __fcntl_compat

It was exposed (under FBSDprivate_1.0) for forward compatability in
threading libraries in 2008 by commit cd7d66a21f1a. The last consumer
was removed in 2015 by c

libc: stop exposing __fcntl_compat

It was exposed (under FBSDprivate_1.0) for forward compatability in
threading libraries in 2008 by commit cd7d66a21f1a. The last consumer
was removed in 2015 by commit 8495e8b1e9e1. I missed this among the _
and __sys_ symbols in commit e2417a21a025.

Reviewed by: imp, kib
Differential Revision: https://reviews.freebsd.org/D43408

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libc: separate syscall and non-syscall symbols

Put declerations of _ and __sys_ prefixed stubs at the top and
everything else at the bottom. Sort the bottom list with sort(1).
This paves the way to

libc: separate syscall and non-syscall symbols

Put declerations of _ and __sys_ prefixed stubs at the top and
everything else at the bottom. Sort the bottom list with sort(1).
This paves the way to generate the syscall symbol list.

Reviewed by: kib
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D43386

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memfd_create: move implementation to libc/gen

Due to memfd_create(3)'s construction of a path to pass to shm_open2(2),
it has a much larger than typical dependency footprint for a system
call wrappe

memfd_create: move implementation to libc/gen

Due to memfd_create(3)'s construction of a path to pass to shm_open2(2),
it has a much larger than typical dependency footprint for a system
call wrapper (the list currently includes calloc, memset, sprintf, and
strlen). As such, split it off into its own file under libc/gen to
lighten libc/sys's dependency list.

Reviewed by: kevans, imp, emaste
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D42709

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libc: further centralize syscall symbols

All architectures necessarily implement _exit(2) and vfork(2) so
declare them in sys/Symbol.map.

Reviewed by: imp, kib, emaste
Differential Revision: https:

libc: further centralize syscall symbols

All architectures necessarily implement _exit(2) and vfork(2) so
declare them in sys/Symbol.map.

Reviewed by: imp, kib, emaste
Differential Revision: https://reviews.freebsd.org/D42614

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libc: Remove empty comments in Symbol.map

These were left over from $FreeBSD$ removal.

Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D42612

timerfd: Move implementation from linux compat to sys/kern

Move the timerfd impelemntation from linux compat code to sys/kern. Use
it to implement the new system calls for timerfd. Add a hook to ker

timerfd: Move implementation from linux compat to sys/kern

Move the timerfd impelemntation from linux compat code to sys/kern. Use
it to implement the new system calls for timerfd. Add a hook to kern_tc
to allow timerfd to know when the system time has stepped. Add kqueue
support to timerfd. Adjust a few names to be less Linux centric.

RelNotes: YES
Reviewed by: markj (on irc), imp, kib (with reservations), jhb (slack)
Differential Revision: https://reviews.freebsd.org/D38459

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Add membarrier(2)

This is an attempt at clean-room implementation of the Linux'
membarrier(2) syscall. For documentation, you would need to read
both membarrier(2) Linux man page, the comments in L

Add membarrier(2)

This is an attempt at clean-room implementation of the Linux'
membarrier(2) syscall. For documentation, you would need to read
both membarrier(2) Linux man page, the comments in Linux
kernel/sched/membarrier.c implementation and possibly look at
actual uses.

Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D32360

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Remove $FreeBSD$: one-line .h pattern

Remove /^\s*\*+\s*\$FreeBSD\$.*$\n/

Rename kqueue1(2) to kqueuex(2) to avoid compat issues with NetBSD

Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D39377

kqueue1(2): export the symbol from libc

Reviewed by: emaste, jhb
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D39271

swapoff: add one more variant of the syscall

Requested and reviewed by: brooks
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D33343

Export _mmap and __sys_mmap from libc.so

Unlike the other syscalls these two symbols were missing from the
version script. I noticed this while looking into the compiler-rt
runtime libraries for CHE

Export _mmap and __sys_mmap from libc.so

Unlike the other syscalls these two symbols were missing from the
version script. I noticed this while looking into the compiler-rt
runtime libraries for CHERI.

Reviewed by: brooks
Obtained from: https://github.com/CTSRD-CHERI/cheribsd/pull/1063
MFC after: 3 days

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Symbol.map: Remove an extra space before _Fork

Make it consistent with all other entries.

Sponsored by: The FreeBSD Foundation

Fix aio_readv(2), aio_writev(2) with SIGEV_THREAD.

Add missing wrapper code to librt for these new functions so that
SIGEV_THREAD works. Without machinery to convert it to SIGEV_THREAD_ID,
you got

Fix aio_readv(2), aio_writev(2) with SIGEV_THREAD.

Add missing wrapper code to librt for these new functions so that
SIGEV_THREAD works. Without machinery to convert it to SIGEV_THREAD_ID,
you got EINVAL.

Reviewed by: asomers
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D31618

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Add fspacectl(2), vn_deallocate(9) and VOP_DEALLOCATE(9).

fspacectl(2) is a system call to provide space management support to
userspace applications. VOP_DEALLOCATE(9) is a VOP call to perform the

Add fspacectl(2), vn_deallocate(9) and VOP_DEALLOCATE(9).

fspacectl(2) is a system call to provide space management support to
userspace applications. VOP_DEALLOCATE(9) is a VOP call to perform the
deallocation. vn_deallocate(9) is a public KPI for kmods' use.

The purpose of proposing a new system call, a KPI and a VOP call is to
allow bhyve or other hypervisor monitors to emulate the behavior of SCSI
UNMAP/NVMe DEALLOCATE on a plain file.

fspacectl(2) comprises of cmd and flags parameters to specify the
space management operation to be performed. Currently cmd has to be
SPACECTL_DEALLOC, and flags has to be 0.

fo_fspacectl is added to fileops.
VOP_DEALLOCATE(9) is added as a new VOP call. A trivial implementation
of VOP_DEALLOCATE(9) is provided.

Sponsored by: The FreeBSD Foundation
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D28347

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Add _Fork()

Current POSIX standard requires fork() to be async-signal safe. Neither
our implementation, nor implementations in other operating systems are,
and practically it is impossible to make

Add _Fork()

Current POSIX standard requires fork() to be async-signal safe. Neither
our implementation, nor implementations in other operating systems are,
and practically it is impossible to make fork() async-signal safe without
too much efforts. Also, that would put undue requirement that all atfork
handlers should be async-signal safe as well, which contradicts its main
use.

As result, Austin Group dropped the requirement, and added a new function
_Fork() that should be async-signal safe, but it does not call atfork
handlers. Basically, _Fork() can be implemented as a raw syscall.

Release of glibc 2.34 added _Fork(), do the same for FreeBSD.
Clarify threading behavior for fork() in the manpage.

Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D31378

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libthr: wrap pdfork(2), same as fork(2).

Without wrapping, rtld services and malloc(3) are not guaranteed
to operate correctly in the forked child.

Reviewed by: markj
MFC after: 1 week
Sponsored by

libthr: wrap pdfork(2), same as fork(2).

Without wrapping, rtld services and malloc(3) are not guaranteed
to operate correctly in the forked child.

Reviewed by: markj
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D28088

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Add aio_writev and aio_readv

POSIX AIO is great, but it lacks vectored I/O functions. This commit
fixes that shortcoming by adding aio_writev and aio_readv. They aren't
part of the standard, but the

Add aio_writev and aio_readv

POSIX AIO is great, but it lacks vectored I/O functions. This commit
fixes that shortcoming by adding aio_writev and aio_readv. They aren't
part of the standard, but they're an obvious extension. They work just
like their synchronous equivalents pwritev and preadv.

It isn't yet possible to use vectored aiocbs with lio_listio, but that
could be added in the future.

Reviewed by: jhb, kib, bcr
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D27743

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Add shm_create_largepage(3) helper for creation and configuration of
largepage shm objects.

And since we can, add memfd_create(MFD_HUGETLB) support, hopefully
close enough to the Linux feature.

Rev

Add shm_create_largepage(3) helper for creation and configuration of
largepage shm objects.

And since we can, add memfd_create(MFD_HUGETLB) support, hopefully
close enough to the Linux feature.

Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D24652

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Add an entry to Symbol.map for the rpctls_syscall added by r361599.

Reviewed by: brooks
Differential Revision: https://reviews.freebsd.org/D24949