linux(4): On Linux SIGKILL can not be reset to default

MFC after: 1 week

linux(4): Staticize lsiginfo_to_siginfo

It's not used outside of linux_signal.c
While here fix the indentation.

MFC after: 1 week

linux(4): Remove sys/cdefs.h inclusion where it's not needed due to 685dc743

sys: Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

linux(4): Use inlined LINUX_KERNVER for tests to improve readability

MFC after: 1 month

linux(4): Rename linux_timer.h to linux_time.h

To avoid confusing people, rename linux_timer.h to linux_time.h,
as linux_timer.c is the implementation of timer syscalls only,
while linux_time.c cont

linux(4): Rename linux_timer.h to linux_time.h

To avoid confusing people, rename linux_timer.h to linux_time.h,
as linux_timer.c is the implementation of timer syscalls only,
while linux_time.c contains implementation of all stuff declared
in linux_time.h.

MFC after: 2 weeks

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linux(4): Cleanup includes under compat/linux

Cleanup unneeded includes, sort the rest according to style(9).
No functional changes.

MFC after: 2 weeks

linux(4): Get rid of the opt_compat.h include.

Since e013e369 COMPAT_LINUX, COMPAT_LINUX32 build options are removed,
so include of opt_compat.h is no more needed.

MFC after: 2 weeks

linux(4): Fix a typo in a source code comment

- s/alredy/already/

MFC after: 3 days

linux(4): Trace Linux l_sigset_t.

MFC after: 2 weeks

linux(4): Prefer sizeof(object) vs sizeof(type)

MFC after: 2 weeks

linux(4): Error is not a bool, use proper comparison

MFC afer: 2 weeks

linux(4): Use the copyin_sigset() in the remaining places

MFC after: 2 weeks

linux(4): Convert the native kernel signal codes into the Linux codes

MFC after: 2 weeks

linux(4): Add a helper intended for copying timespec's from the userspace.

There are many places where we copyin Linux timespec from the userspace
and then convert it to the kernel timespec. To avoi

linux(4): Add a helper intended for copying timespec's from the userspace.

There are many places where we copyin Linux timespec from the userspace
and then convert it to the kernel timespec. To avoid code duplication
add a tiny halper for doing this.

MFC after: 2 weeks

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linux(4): Add copyin_sigset() helper.

MFC after: 2 weeks

linux(4): Refactor signal send methods.

Created a couple of helpers to send signals to the specific thread or to
the whole process. Use helpers in the corresponding syscalls.
This fixes the confusio

linux(4): Refactor signal send methods.

Created a couple of helpers to send signals to the specific thread or to
the whole process. Use helpers in the corresponding syscalls.
This fixes the confusion where a signal destined for a whole process
was sent to a specific thread and vice versa.
There is an exclusion for the linux_kill() syscall that takes a pid
argument and should send a signal to the whole process, but I know
at least one example where kill() takes tid.

MFC after: 2 weeks

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linux: Also translate the signal if the code is CLD_KILLED

This fixes ./waitid.gen.test from the strace(1) test suite.

Reviewed By: kib
Sponsored By: EPSRC
Differential Revision: https://reviews.fr

linux: Also translate the signal if the code is CLD_KILLED

This fixes ./waitid.gen.test from the strace(1) test suite.

Reviewed By: kib
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D32617

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linux: implement sigaltstack(2) on arm64

... by making it machine-independent.

Reviewed By: dchagin
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D31286

linux: implement rt_sigsuspend(2) on arm64

... by making it architecture-independent.

Reviewed By: dchagin
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D31259

linux(4): Improve comment about SA_RESTORER

No functional changes.

Sponsored By: EPSRC

linux(4): Implement rt_sigtimedwait_time64 system call.

It still does not work as intended, awaits D30675.

MFC after: 2 weeks

linux(4): optimize ksiginfo to siginfo conversion.

Retire ksiginfo_to_lsiginfo function, use siginfo_to_lsiginfo instead.
Convert rt_sigtimedwait siginfo variables to well known names.

MFC after: 2

linux(4): optimize ksiginfo to siginfo conversion.

Retire ksiginfo_to_lsiginfo function, use siginfo_to_lsiginfo instead.
Convert rt_sigtimedwait siginfo variables to well known names.

MFC after: 2 weeks

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linux(4): Properly convert linux siginfo to native siginfo
add input validation.

MFC after: 2 weeks

linux(4): Fix timeout parameter of rt_sigtimedwait syscall, which is
timespec not a timeval.

MFC after: 2 weeks