linux: Make PTRACE_GETREGSET return proper buffer size

This fixes Chrome warning:

[1022/152319.328632:ERROR:ptracer.cc(476)] Unexpected registers size 0 != 216, 68

Reviewed By: emaste
Sponsored By

linux: Make PTRACE_GETREGSET return proper buffer size

This fixes Chrome warning:

[1022/152319.328632:ERROR:ptracer.cc(476)] Unexpected registers size 0 != 216, 68

Reviewed By: emaste
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D32616

(cherry picked from commit f939dccfd770df2f9070cd30aa52105b7afe1bde)

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linux: Fix ptrace panic with ERESTART

Translate ERESTART into Linux "internal" errno ERESTARTSYS.
This fixes the erestartsys.gen.test from strace(1).

Reviewed By: kib
Sponsored By: EPSRC
Differenti

linux: Fix ptrace panic with ERESTART

Translate ERESTART into Linux "internal" errno ERESTARTSYS.
This fixes the erestartsys.gen.test from strace(1).

Reviewed By: kib
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D32623

(cherry picked from commit 6547153e4618c3b57e5f76062de006a04ecbd64b)

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linux: Improve debug for PTRACE_GETEVENTMSG

No functional changes.

Sponsored By: EPSRC

(cherry picked from commit 2ec26ae402fc2589cb97bb5aa713b6d0ba080c17)

linux: implement PTRACE_EVENT_EXEC

This fixes strace(1) from Ubuntu Focal.

Reviewed By: jhb
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D32367

(cherry picked from commit

linux: implement PTRACE_EVENT_EXEC

This fixes strace(1) from Ubuntu Focal.

Reviewed By: jhb
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D32367

(cherry picked from commit 6e66030c4c05331f9b0adf87c31f2f233dd3ae1f)

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linux: Make PTRACE_GET_SYSCALL_INFO handle EJUSTRETURN

This fixes panic when trying to run strace(8) from Focal.

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

linux: Make PTRACE_GET_SYSCALL_INFO handle EJUSTRETURN

This fixes panic when trying to run strace(8) from Focal.

Reviewed By: kib
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D32355

(cherry picked from commit 2558bb8e9166395dce26afcfac91fc692621de7b)

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linux: Improve debug for PTRACE_GETREGSET

No functional changes.

Sponsored By: EPSRC

(cherry picked from commit e3a83df1195cc4f48f2908b423b5c80dd9c49a21)

linux: Improve debugging for PTRACE_GETREGSET

It's triggered by gdb(1).

Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D32456

(cherry picked from commit a03d4d73e4c7c734472

linux: Improve debugging for PTRACE_GETREGSET

It's triggered by gdb(1).

Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D32456

(cherry picked from commit a03d4d73e4c7c73447263294df6ebd1791ab01f2)

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linux: Implement some bits of PTRACE_PEEKUSER

This makes Linux gdb from Bionic a little less broken.

Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D32455

(cherry picked fr

linux: Implement some bits of PTRACE_PEEKUSER

This makes Linux gdb from Bionic a little less broken.

Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D32455

(cherry picked from commit f9246e14848820664539763b72b6fdef408d20e4)

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linux: Adjust PTRACE_GET_SYSCALL_INFO buffer size semantics

The tests/ptrace_syscall_info test from strace(1) complained
about this.

Sponsored By: EPSRC
Differential Revision: https://reviews.freeb

linux: Adjust PTRACE_GET_SYSCALL_INFO buffer size semantics

The tests/ptrace_syscall_info test from strace(1) complained
about this.

Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D32368

(cherry picked from commit 75a9d95b4d0a043ac0f3f8d1efc0982156337eac)

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Remove PT_GET_SC_ARGS_ALL

Reimplement bdf0f24bb16d556a5b by checking for the caller' ABI in
the implementation of PT_GET_SC_ARGS, and copying out everything if
it is Linuxolator.

Also fix a minor i

Remove PT_GET_SC_ARGS_ALL

Reimplement bdf0f24bb16d556a5b by checking for the caller' ABI in
the implementation of PT_GET_SC_ARGS, and copying out everything if
it is Linuxolator.

Also fix a minor information leak: if PT_GET_SC_ARGS_ALL is done on the
thread reused after other process, it allows to read some number of that
thread last syscall arguments. Clear td_sa.args in thread_alloc().

Reviewed by: jhb
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D31968

(cherry picked from commit f575573ca57716395ad88b962388a55d755cf6a7)

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linux: implement PTRACE_GET_SYSCALL_INFO

This is one of the pieces required to make modern (ie Focal)
strace(1) work.

Reviewed By: jhb (earlier version)
Sponsored by: EPSRC
Differential Revision: h

linux: implement PTRACE_GET_SYSCALL_INFO

This is one of the pieces required to make modern (ie Focal)
strace(1) work.

Reviewed By: jhb (earlier version)
Sponsored by: EPSRC
Differential Revision: https://reviews.freebsd.org/D28212

(cherry picked from commit bdf0f24bb16d556a5b1e01cdfc087d08e91ac572)

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linux: make ptrace(2) return EIO when trying to peek invalid address

Previously we've returned the error from native ptrace(2), ENOMEM.
This confused Linux strace(2).

Reviewed By: emaste
Sponsored

linux: make ptrace(2) return EIO when trying to peek invalid address

Previously we've returned the error from native ptrace(2), ENOMEM.
This confused Linux strace(2).

Reviewed By: emaste
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D29925

(cherry picked from commit 77651151f3caec7d2440404f8c0f1819757d1d5d)

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linux: refactor bsd_to_linux_regset() out of linux_ptrace.c

This will be used for Linux coredump support.

Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D30365

(cherry pick

linux: refactor bsd_to_linux_regset() out of linux_ptrace.c

This will be used for Linux coredump support.

Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D30365

(cherry picked from commit 95c19e1d65619624db4a7a21afc1685f122a05c1)

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linux(4): make arch_prctl(2) support GET_CET_STATUS, report unknown codes

This is largely a no-op, to make future debugging slightly easier.

Sponsored By: EPSRC
Differential Revision: https://revie

linux(4): make arch_prctl(2) support GET_CET_STATUS, report unknown codes

This is largely a no-op, to make future debugging slightly easier.

Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D30035

(cherry picked from commit 916f3dba4523d1b2d478538875d45df56b20bcdb)

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linux(4): fix ptrace(2) to properly handle orig_rax

This fixes strace(1) erroneously reporting return values
as "Function not implemented", combined with reporting the binary
ABI as X32.

Very simil

linux(4): fix ptrace(2) to properly handle orig_rax

This fixes strace(1) erroneously reporting return values
as "Function not implemented", combined with reporting the binary
ABI as X32.

Very similar code in linux_ptrace_getregs() is left as it is - it's
probably wrong too, but I don't have a way to test it.

Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D29927

(cherry picked from commit 023bff799098cac28732f2800c967f0248d2eb47)

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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 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)

linux: adjust ordering of Linux auxv and add dummy AT_HWCAP2

This should be a no-op; the purpose of this is to reduce
a spurious difference between Linuxulator and Linux, to make
debugging core dump

linux: adjust ordering of Linux auxv and add dummy AT_HWCAP2

This should be a no-op; the purpose of this is to reduce
a spurious difference between Linuxulator and Linux, to make
debugging core dumps slightly easier.

Note that AT_HWCAP2 we pass to Linux binaries is always 0,
instead of being equal to 'cpu_feature2'. This matches what
I've observed under Ubuntu Focal VM.

Reviewed By: chuck, dchagin
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D29609

(cherry picked from commit ca6e1fa3ce87f56847633530cb94a6fb63405680)

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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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Add security.bsd.allow_ptrace sysctl

(cherry picked from commit fe6db727081936c43250f97a4ff4b9de20eb0091)

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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