amd64/linux*: mark brandlists as static

Sponsored by: The FreeBSD Foundation
MFC after: 3 days

linux(4): Deorbit linux_nosys

Differential Revision: https://reviews.freebsd.org/D41901
MFC after: 1 week

linuxolator: fix nosys() to not send SIGSYS

Reviewed by: dchagin, markj
Discussed with: jhb
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/

linuxolator: fix nosys() to not send SIGSYS

Reviewed by: dchagin, markj
Discussed with: jhb
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D41976

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linux(4): Cleanup includes under amd64/linux

No functional changes.

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): Add elf_hwcap2 to x86

On x86 Linux via AT_HWCAP2 the user controlled (by tunables) processor
capabilities are exposed.

Reviewed by:
Differential Revision: https://reviews.freebsd.org/D411

linux(4): Add elf_hwcap2 to x86

On x86 Linux via AT_HWCAP2 the user controlled (by tunables) processor
capabilities are exposed.

Reviewed by:
Differential Revision: https://reviews.freebsd.org/D41165
MFC after: 2 weeks

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linux(4): Preserve fpu xsave state across signal delivery on amd64

PR: 270247
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D40444
MFC after: 2 weeks

linux(4): In preparation for xsave refactor fxsave code on amd64

Due to fxsave area is os independent reimplement fxsave handmade code
using copying of a whole area.

Reviewed by: kib
Differential

linux(4): In preparation for xsave refactor fxsave code on amd64

Due to fxsave area is os independent reimplement fxsave handmade code
using copying of a whole area.

Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D40443
MFC after: 2 weeks

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linux(4) rt_sendsig: Remove the use of caddr_t

Replace caddr_t by more appropriate char *.

MFC after: 2 weeks

linux(4): Use pwd_altroot() to tell namei() about ABI root path

PR: 72920
Differential Revision: https://reviews.freebsd.org/D40090
MFC after: 2 month

linux(4): Preserve %rcx (return address) like a Linux do

Perhaps, this does not makes much sense as destroyng %rcx declared by
the x86_64 Linux syscall ABI. However,:
a) if we get a signal while we

linux(4): Preserve %rcx (return address) like a Linux do

Perhaps, this does not makes much sense as destroyng %rcx declared by
the x86_64 Linux syscall ABI. However,:
a) if we get a signal while we are in the kernel, we should restore
tf_rcx when preparing machine context for signal handlers.
b) the Linux world is strange, someone can depend on %rcx value
after syscall, something like go.

Differential Revision: https://reviews.freebsd.org/D40155
MFC after: 1 month

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linux(4): Simplify %r10 restoring on amd64

Restore %r10 at system call entry to avoid doing this multiply times.

Differential Revision: https://reviews.freebsd.org/D40154
MFC after: 1 month

linux(4): Add a comment explaining registers at syscall entry point on amd64

Differential Revision: https://reviews.freebsd.org/D40153
MFC after: 1 month

linux(4): Drop a weird comment from linux_set_syscall_retval on amd64

I agree, it would be great to avoid PCB_FULL_IRET, however we should
follow Linux system call ABI.

Reviewed by: emaste
Differe

linux(4): Drop a weird comment from linux_set_syscall_retval on amd64

I agree, it would be great to avoid PCB_FULL_IRET, however we should
follow Linux system call ABI.

Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D40152
MFC after: 1 month

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linux(4): Deduplicate linux_copyout_auxargs()

Export default MINSIGSTKSZ value for the x86 until we do not preserve AVX
registers in the signal context.

Differential Revision: https://reviews.freeb

linux(4): Deduplicate linux_copyout_auxargs()

Export default MINSIGSTKSZ value for the x86 until we do not preserve AVX
registers in the signal context.

Differential Revision: https://reviews.freebsd.org/D39644
MFC after: 1 month

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linux(4): Cleanup includes under amd64/linux

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

MFC after: 2 weeks

linux(4): Remove stale comment that no longer applies.

MFC after: 1 week

linux(4): Microoptimize rt_sendsig() on amd64.

Drop proc lock earlier, before copying user stuff.

Pointed out by: kib
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D38326
MF

linux(4): Microoptimize rt_sendsig() on amd64.

Drop proc lock earlier, before copying user stuff.

Pointed out by: kib
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D38326
MFC after: 1 week

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linux(4): Preserve fpu fxsave state across signal delivery on amd64.

PR: 240768
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D38302
MFC after: 1 week

linux(4): Deduplicate linux_trans_osrel().

MFC after: 1 week

linux(4): Deduplicate linux_copyout_strings().

It is still present in the 32-bit Linuxulator on amd64.

MFC after: 1 week

linux(4): Deduplicate linux_fixup_elf().

Use native routines to fixup initial process stack. On Arm64 linux_elf_fixup() is
noop, as it do the stack fixup (room for argc) in the linux_copyout_strings

linux(4): Deduplicate linux_fixup_elf().

Use native routines to fixup initial process stack. On Arm64 linux_elf_fixup() is
noop, as it do the stack fixup (room for argc) in the linux_copyout_strings().

MFC after: 1 week

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linux(4): Microoptimize linux_elf.h for future use.

In order to reduce code duplication move coredump support definitions
into the appropriate header and hide private definitions.

MFC after: 1 week

linux: populate sv_syscallnames in each sysentvec

This allows the syscallname() function to give a usable result for Linux
ABIs.

Reported by: jrtc27
Reviewed by: jrtc27, markj, jhb
MFC after: 1 wee

linux: populate sv_syscallnames in each sysentvec

This allows the syscallname() function to give a usable result for Linux
ABIs.

Reported by: jrtc27
Reviewed by: jrtc27, markj, jhb
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D37199

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