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

(cherry pic

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

(cherry picked from commit 72f7ddb587a79dbea353e40b182ea93bb1dfea21)

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Regen after 2561da0636c.

(cherry picked from commit 8bc3dc01005e56035be8807d2a559c1a86960519)

linux: Fix declaration of rt_sigreturn() on arm64

On Linux, this syscall doesn't take any arguments; instead
it assumes the context was put on the stack.

Reviewed By: dchagin
Sponsored By: EPSRC
Di

linux: Fix declaration of rt_sigreturn() on arm64

On Linux, this syscall doesn't take any arguments; instead
it assumes the context was put on the stack.

Reviewed By: dchagin
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D31251

(cherry picked from commit 2561da0636c1b8504d05246258a5333b621a2433)

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linux(4): remove unfinished vsyscall bits on arm64

The vsyscall mechanism is obsolete.

Reviewed By: dchagin, emaste
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D31091

(c

linux(4): remove unfinished vsyscall bits on arm64

The vsyscall mechanism is obsolete.

Reviewed By: dchagin, emaste
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D31091

(cherry picked from commit 84a3963d5d94be05c913d04ea0cef4ac69a8bfc7)

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linux: implement set_cloned_tls() on arm64

This fixes random segfaults on "git commit --amend".

Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D30508

(cherry picked from co

linux: implement set_cloned_tls() on arm64

This fixes random segfaults on "git commit --amend".

Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D30508

(cherry picked from commit a397b5508320e757274bc652b43ccb2e1a702933)

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linux: implement set_upcall on aarch64

This fixes "git diff" (git-1:2.25.1-1ubuntu3).

Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D30509

(cherry picked from commit e505c

linux: implement set_upcall on aarch64

This fixes "git diff" (git-1:2.25.1-1ubuntu3).

Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D30509

(cherry picked from commit e505c3066bbdb96dd28ff4634a315346490b9b33)

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linux: export AT_HWCAP and AT_HWCAP2 on aarch64

The flag values seem to be the same between Linux and FreeBSD.
Comparing to a Linux VM on the same hardware, we're missing
HWCAP_EVTSTRM, HWCAP_CPUID,

linux: export AT_HWCAP and AT_HWCAP2 on aarch64

The flag values seem to be the same between Linux and FreeBSD.
Comparing to a Linux VM on the same hardware, we're missing
HWCAP_EVTSTRM, HWCAP_CPUID, HWCAP_DCPOP, HWCAP_USCAT, HWCAP_PACA,
and HWCAP_PACG.

Reviewed By: mhorne, emaste
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D30540

(cherry picked from commit b501b2ae52f3ccb384584dcbb5dc4a4568cc0096)

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linux: fix architecture returned for uname on aarch64

Previously it would return "arm64", which was breaking build
for Linux kernel. While here, reshuffle entries in the auxv
vector to match real L

linux: fix architecture returned for uname on aarch64

Previously it would return "arm64", which was breaking build
for Linux kernel. While here, reshuffle entries in the auxv
vector to match real Linux.

Reviewed By: emaste
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D30500

(cherry picked from commit aa462cab60c8957a97f612d36ac0a4dfa501bbbe)

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linux: deduplicate DUMMY() entries

No functional changes.

Reviewed By: emaste
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D30524

(cherry picked from commit 83043a741d114

linux: deduplicate DUMMY() entries

No functional changes.

Reviewed By: emaste
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D30524

(cherry picked from commit 83043a741d114d7fd4a018e9c70330036ae44f81)

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linux: make linux64.ko loadable again on aarch64

This should probably get deduplicated; this is a quick fix
just to unbreak things.

Fixes: 6d926e850d2
Sponsored By: EPSRC

(cherry picked from comm

linux: make linux64.ko loadable again on aarch64

This should probably get deduplicated; this is a quick fix
just to unbreak things.

Fixes: 6d926e850d2
Sponsored By: EPSRC

(cherry picked from commit 023ee5392c77fbb803ea7552d7a25f7d231e56f8)

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Regen after 6d926e850d2.

Sponsored By: EPSRC

(cherry picked from commit c0f171736a703c8d01f955190cfe5142381752f5)

linux: add new syscall numbers

Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D30193

(cherry picked from commit 6d926e850d22c5c563571561c446c3c0dec16143)

Fix the build after commit 5fa005e91560785dad5183db080209447afde3c2

Fixes: 5fa005e91560 ("exec: Reimplement stack address randomization")

sysent: Add a sv_psstringssz field to struct sysentvec

The size of the ps_strings structure varies between ABIs, so this is
useful for computing the address of the ps_strings structure relative to
t

sysent: Add a sv_psstringssz field to struct sysentvec

The size of the ps_strings structure varies between ABIs, so this is
useful for computing the address of the ps_strings structure relative to
the top of the stack when stack address randomization is enabled.

Reviewed by: kib
Sponsored by: The FreeBSD Foundation

(cherry picked from commit 3fc21fdd5f8a4eeb71f43cc6841f59ef1debaf9a)

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exec: Introduce the PROC_PS_STRINGS() macro

Rather than fetching the ps_strings address directly from a process'
sysentvec, use this macro. With stack address randomization the
ps_strings address i

exec: Introduce the PROC_PS_STRINGS() macro

Rather than fetching the ps_strings address directly from a process'
sysentvec, use this macro. With stack address randomization the
ps_strings address is no longer fixed.

Reviewed by: kib
Sponsored by: The FreeBSD Foundation

(cherry picked from commit 706f4a81a81250a326ea25914e7effe1768f1a37)

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exec: Simplify sv_copyout_strings implementations a bit

Simplify control flow around handling of the execpath length and signal
trampoline. Cache the sysentvec pointer in a local variable.

No func

exec: Simplify sv_copyout_strings implementations a bit

Simplify control flow around handling of the execpath length and signal
trampoline. Cache the sysentvec pointer in a local variable.

No functional change intended.

Reviewed by: kib
Sponsored by: The FreeBSD Foundation

(cherry picked from commit f04a096049382637178b54ffb45089f5f9fb3db9)

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