MFC r350863:
compat/linux: Remove obsoleted and somewhat confusing comments related to COMPAT_43.

MFC r351194:
Change locking requirements for VOP_UNSET_TEXT().

MFC r347151,347181,347968,348421,348698,348701:
Switch to use shared vnode locks for text files during image activation.

For MFC, VOP_GET_WRITECOUNT was left in the slot for KBI stability, but it
is

MFC r347151,347181,347968,348421,348698,348701:
Switch to use shared vnode locks for text files during image activation.

For MFC, VOP_GET_WRITECOUNT was left in the slot for KBI stability, but it
is unused.

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MFC r346965:

Follow the FreeBSD and implement PDEATH_SIG prctl ops in the Linuxulator.
It was first introduced in r163734 and missied by me in r283383.

MFC linuxulator stack memory disclosure fixes

r343260 linuxulator: fix stack memory disclosure in linux_ioctl_v4l
r343261 linuxulator: fix stack memory disclosure in linux_ioctl_termio
r343262 linux

MFC linuxulator stack memory disclosure fixes

r343260 linuxulator: fix stack memory disclosure in linux_ioctl_v4l
r343261 linuxulator: fix stack memory disclosure in linux_ioctl_termio
r343262 linuxulator: fix stack memory disclosure in linux_sigaltstack
r343263 linuxulator: fix stack memory disclosure in linux_sigaltstack

admbugs: 765
Reported by: Vlad Tsyrklevich <[email protected]>
Security: Kernel stack memory disclosure
Sponsored by: The FreeBSD Foundation

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Make timespecadd(3) and friends public

The timespecadd(3) family of macros were imported from NetBSD back in
r35029. However, they were initially guarded by #ifdef _KERNEL. In the
meantime, we have

Make timespecadd(3) and friends public

The timespecadd(3) family of macros were imported from NetBSD back in
r35029. However, they were initially guarded by #ifdef _KERNEL. In the
meantime, we have grown at least 28 syscalls that use timespecs in some
way, leading many programs both inside and outside of the base system to
redefine those macros. It's better just to make the definitions public.

Our kernel currently defines two-argument versions of timespecadd and
timespecsub. NetBSD, OpenBSD, and FreeDesktop.org's libbsd, however, define
three-argument versions. Solaris also defines a three-argument version, but
only in its kernel. This revision changes our definition to match the
common three-argument version.

Bump _FreeBSD_version due to the breaking KPI change.

Discussed with: cem, jilles, ian, bde
Differential Revision: https://reviews.freebsd.org/D14725

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Split kern_break from sys_break and use it in linuxulator

Previously the linuxulator's linux_brk invoked the FreeBSD sys_break
syscall implementation directly. Instead, move the bulk of the existin

Split kern_break from sys_break and use it in linuxulator

Previously the linuxulator's linux_brk invoked the FreeBSD sys_break
syscall implementation directly. Instead, move the bulk of the existing
implementation to kern_break, and call that from both sys_break and
linux_brk.

This also addresses a minor bug in linux_brk in that we now return the
actual (rounded up) break address, rather than the requested value.

Reviewed by: brooks (earlier version)
Sponsored by: Turing Robotic Industries
Differential Revision: https://reviews.freebsd.org/D16019

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linuxulator: handle V3 capget/capset

Linux 2.6.26 introduced 64-bit capability sets. Extend our stub
implementation to handle both 32- and 64-bit. (We still report no
capabilities in capget, and d

linuxulator: handle V3 capget/capset

Linux 2.6.26 introduced 64-bit capability sets. Extend our stub
implementation to handle both 32- and 64-bit. (We still report no
capabilities in capget, and disallow any in capset.)

Reviewed by: chuck
Sponsored by: Turing Robotic Industries Inc.
Differential Revision: https://reviews.freebsd.org/D15887

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linuxulator: add debugging for invalid capget/capset version

Sponsored by: Turing Robotic Industries Inc.

linuxulator: do not include legacy syscalls on arm64

Existing linuxulator platforms (i386, amd64) support legacy syscalls,
such as non-*at ones like open, but arm64 and other new platforms do
not.

linuxulator: do not include legacy syscalls on arm64

Existing linuxulator platforms (i386, amd64) support legacy syscalls,
such as non-*at ones like open, but arm64 and other new platforms do
not.

Wrap these in #ifdef LINUX_LEGACY_SYSCALLS, #defined in the MD linux.h
files. We may need finer grained control in the future but this is
sufficient for now.

Reviewed by: andrew
Sponsored by: Turing Robotic Industries
Differential Revision: https://reviews.freebsd.org/D15237

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Name the implementation of brk and sbrk sys_break().

The break() system call was renamed (several times) starting in v3
AT&T UNIX when C was invented and break was a language keyword. The
last vesta

Name the implementation of brk and sbrk sys_break().

The break() system call was renamed (several times) starting in v3
AT&T UNIX when C was invented and break was a language keyword. The
last vestage of a need for it to be called something else (eg obreak)
was removed in r225617 which consistantly prefixed all syscall
implementations.

Reviewed by: emaste, kib (older version)
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D15638

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Correct proper nouns in the Linuxulator

- Capitalize Linux
- Spell FreeBSD out in full
- Address some style(9) on changed lines

Sponsored by: Turing Robotic Industries Inc.

Make v_wire_count a per-cpu counter(9) counter. This eliminates a
significant source of cache line contention from vm_page_alloc(). Use
accessors and vm_page_unwire_noq() so that the mechanism can

Make v_wire_count a per-cpu counter(9) counter. This eliminates a
significant source of cache line contention from vm_page_alloc(). Use
accessors and vm_page_unwire_noq() so that the mechanism can be easily
changed in the future.

Reviewed by: markj
Discussed with: kib, glebius
Tested by: pho (earlier version)
Sponsored by: Netflix, Dell/EMC Isilon
Differential Revision: https://reviews.freebsd.org/D14273

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Linuxolator whitespace cleanup

A version of each of the MD files by necessity exists for each CPU
architecture supported by the Linuxolator. Clean these up so that new
architectures do not inherit

Linuxolator whitespace cleanup

A version of each of the MD files by necessity exists for each CPU
architecture supported by the Linuxolator. Clean these up so that new
architectures do not inherit whitespace issues.

Clean up shared Linuxolator files while here.

Sponsored by: Turing Robotic Industries Inc.

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sys/compat: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - er

sys/compat: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

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On success, getrandom() Linux system call returns the number of bytes that
were copied to the buffer supplied by the user.

PR: 219464
Submitted by: Maciej Pasternacki
Reported by: Maciej

On success, getrandom() Linux system call returns the number of bytes that
were copied to the buffer supplied by the user.

PR: 219464
Submitted by: Maciej Pasternacki
Reported by: Maciej Pasternacki
MFC after: 1 week

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Revert r319053 due to lack of sence. As pointed out by kib@ opt_global.h
contains such fundamental settings as e.g. SMP option and fake
opt_global.h almost never match real configured kernels.

Repor

Revert r319053 due to lack of sence. As pointed out by kib@ opt_global.h
contains such fundamental settings as e.g. SMP option and fake
opt_global.h almost never match real configured kernels.

Reported by: kib@

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On success, getrandom() Linux system call returns the number of bytes that
were copied to the buffer supplied by the user.

Also fix getrandom() if Linuxulator modules are built without the kernel.

On success, getrandom() Linux system call returns the number of bytes that
were copied to the buffer supplied by the user.

Also fix getrandom() if Linuxulator modules are built without the kernel.

PR: 219464
Submitted by: Maciej Pasternacki
Reported by: Maciej Pasternacki
MFC after: 1 week

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Use kern_mincore() helper instead of abusing syscall entry.

Suggested by: kib@
Reviewed by: kib@
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D10143

Implement Linux mincore() system call.
This is necessary for the upcoming drm-next.

Suggested by: hselasky@
MFC after: 1 month

Implement getrandom() syscall.
Note. GRND_RANDOM option is not supported for now.

MFC after: 1 month

Return EOVERFLOW error in case then the size of tv_sec field of struct timespec
in COMPAT_LINUX32 Linuxulator's not equal to the size of native tv_sec.

MFC after: 1 month

Rework r313352.

Rename kern_vm_* functions to kern_*. Move the prototypes to
syscallsubr.h. Also change Mach VM types to uintptr_t/size_t as
needed, to avoid headers pollution.

Requested by: alc,

Rework r313352.

Rename kern_vm_* functions to kern_*. Move the prototypes to
syscallsubr.h. Also change Mach VM types to uintptr_t/size_t as
needed, to avoid headers pollution.

Requested by: alc, jhb
Reviewed by: alc
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D9535

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Add kern_vm_mmap2(), kern_vm_mprotect(), kern_vm_msync(), kern_vm_munlock(),
kern_vm_munmap(), and kern_vm_madvise(), and use them in various compats
instead of their sys_*() counterparts.

Reviewed

Add kern_vm_mmap2(), kern_vm_mprotect(), kern_vm_msync(), kern_vm_munlock(),
kern_vm_munmap(), and kern_vm_madvise(), and use them in various compats
instead of their sys_*() counterparts.

Reviewed by: ed, dchagin, kib
MFC after: 2 weeks
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D9378

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Add kern_cpuset_getaffinity() and kern_cpuset_getaffinity(),
and use it in compats instead of their sys_*() counterparts.

Reviewed by: kib, jhb, dchagin
MFC after: 2 weeks
Sponsored by: DARPA, AFRL

Add kern_cpuset_getaffinity() and kern_cpuset_getaffinity(),
and use it in compats instead of their sys_*() counterparts.

Reviewed by: kib, jhb, dchagin
MFC after: 2 weeks
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D9383

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