libsys, libc: provide rfork_thread() and pdrfork_thread() on all arches

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

libsys, libc: provide rfork_thread() and pdrfork_thread() on all arches

Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D54898

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libsys/riscv: Remove pointless MD syscall(2)

This file is functionally identical to the stub generated by
Makefile.sys once the MD version is removed.

Reviewed by: kib
Differential Revision: https:

libsys/riscv: Remove pointless MD syscall(2)

This file is functionally identical to the stub generated by
Makefile.sys once the MD version is removed.

Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D44232

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libc: Move per-arch sys/Makefile.inc to libsys

libc/<arch>/sys/Makefile.inc -> libsys/<arch>/Makefile.sys.

Require that libsys/<arch>/Makefile.sys exist. At least for current
archtiectures, it's n

libc: Move per-arch sys/Makefile.inc to libsys

libc/<arch>/sys/Makefile.inc -> libsys/<arch>/Makefile.sys.

Require that libsys/<arch>/Makefile.sys exist. At least for current
archtiectures, it's not possible for an architecture to not have and MD
syscall bits.

powerpcspe/Makefile.sys's structure means it had to be modified when moved
so rename detection won't work, but it has trivial contents so the
history is unimportant.

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

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libc: don't needlessly add vfork.o to NOASM

For architectures where vfork.S was named Ovfork.S this was needed, but
it was always pointless here as an entry in either MDASM or NOASM is
equivalent.

libc: don't needlessly add vfork.o to NOASM

For architectures where vfork.S was named Ovfork.S this was needed, but
it was always pointless here as an entry in either MDASM or NOASM is
equivalent.

Reviewed by: kib
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D42914

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Remove never implemented sbrk and sstk syscalls

Both system calls were stubs returning EOPNOTSUPP and libc did not
provide _ or __sys_ prefixed symbols. The actual implementation of
sbrk(2) is on t

Remove never implemented sbrk and sstk syscalls

Both system calls were stubs returning EOPNOTSUPP and libc did not
provide _ or __sys_ prefixed symbols. The actual implementation of
sbrk(2) is on top of the undocumented break(2) system call.

Technically this is a change in ABI, but no non-contrived program ever
called these syscalls.

Reviewed by: kib, emaste
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D42872

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libc/<arch>/sys/Makefile.inc: remove cruft

Remove stray blank lines left over from $FreeBSD$ removal as well as
some CVS-era (perhaps pre-repocopy) version comments.

Reviewed by: emaste
Differentia

libc/<arch>/sys/Makefile.inc: remove cruft

Remove stray blank lines left over from $FreeBSD$ removal as well as
some CVS-era (perhaps pre-repocopy) version comments.

Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D42611

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Remove $FreeBSD$: one-line sh pattern

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

Add sched_getcpu()

for compatibility with Linux.

Reviewed by: jhb
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D32901

riscv: Implement non-stub __vdso_gettc and __vdso_gettimekeep

PR: 256905
Reviewed by: arichardson, mhorne
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D30963

Reimplement brk() and sbrk() to avoid the use of _end.

Previously, libc.so would initialize its notion of the break address
using _end, a special symbol emitted by the static linker following
the bs

Reimplement brk() and sbrk() to avoid the use of _end.

Previously, libc.so would initialize its notion of the break address
using _end, a special symbol emitted by the static linker following
the bss section. Compatibility issues between lld and ld.bfd could
cause the wrong definition of _end (libc.so's definition rather than
that of the executable) to be used, breaking the brk()/sbrk()
interface.

Avoid this problem and future interoperability issues by simply not
relying on _end. Instead, modify the break() system call to return
the kernel's view of the current break address, and have libc
initialize its state using an extra syscall upon the first use of the
interface. As a side effect, this appears to fix brk()/sbrk() usage
in executables run with rtld direct exec, since the kernel and libc.so
no longer maintain separate views of the process' break address.

PR: 228574
Reviewed by: kib (previous version)
MFC after: 2 months
Differential Revision: https://reviews.freebsd.org/D15663

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Remove architecture specific shmat.S files.

These files are identical to the generated system calls.
In the case of MIPS, the file was already disconnected from the build.

Submitted by: Ali Mashtiz

Remove architecture specific shmat.S files.

These files are identical to the generated system calls.
In the case of MIPS, the file was already disconnected from the build.

Submitted by: Ali Mashtizadeh <ali@mashtizadeh.com>
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D14976

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Remove architecture specific sigreturn.S files.

All of these files are identical (modulo license blocks and VCS IDs) to
the files generated by lib/libc/sys/Makefile.inc and serve no purpose.

Report

Remove architecture specific sigreturn.S files.

All of these files are identical (modulo license blocks and VCS IDs) to
the files generated by lib/libc/sys/Makefile.inc and serve no purpose.

Reported by: Ali Mashtizadeh <ali@mashtizadeh.com>
Reviewed by: kib
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D14953

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Reduce duplicate NOASM and PSEUDO definitions

The initial value of NOASM is nearly the same in all cases and the
initial value of PSEUDO is the same in all cases so reduce duplication
(and hopefully

Reduce duplicate NOASM and PSEUDO definitions

The initial value of NOASM is nearly the same in all cases and the
initial value of PSEUDO is the same in all cases so reduce duplication
(and hopefully, future merge conflicts) by machine independent defaults.

Also document the PSEUDO variable.

Reviewed by: jhb, kib
Obtained from: CheriBSD
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D7820

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Remove unusedd and obsolete openbsd_poll system call. (Phase 1)

Reported by: brooks
Reviewed by: brooks,jhb
Differential Revision: https://reviews.freebsd.org/D7548

Replace use of the pipe(2) system call with pipe2(2) with a zero flags
value.

This eliminates the need for machine dependant assembly wrappers for
pipe(2).

It also make passing an invalid address t

Replace use of the pipe(2) system call with pipe2(2) with a zero flags
value.

This eliminates the need for machine dependant assembly wrappers for
pipe(2).

It also make passing an invalid address to pipe(2) return EFAULT rather
than triggering a segfault. Document this behavior (which was already
true for pipe2(2), but undocumented).

Reviewed by: andrew
Approved by: re (gjb)
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D6815

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Do not generate code for sbrk syscall -- sbrk support was removed.

Pointed out by: andrew

Remove legacy brk and sbrk from RISC-V.

Discussed with: andrew
Sponsored by: DARPA, AFRL
Sponsored by: HEIF5

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