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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Add quirks for Linux ABI signals handling

(cherry picked from commit 870e197d52c1cb8c3ed6d04ddae34dcae57cb657)

linuxolator: Add compat.linux.setid_allowed knob

PR: 21463

(cherry picked from commit 598f6fb49c9ca688029b79de0a44227ab79c608c)

linux: Update the i386/linux vdso deinitialization routine

This was missed in commit 0fc8a796722 ("linux: Unmap the VDSO page when
unloading").

Reported by: Mark Millard
MFC with: 0fc8a796722

(che

linux: Update the i386/linux vdso deinitialization routine

This was missed in commit 0fc8a796722 ("linux: Unmap the VDSO page when
unloading").

Reported by: Mark Millard
MFC with: 0fc8a796722

(cherry picked from commit aa5fef60bf663d31cddf53d7a8c6856d5e4672c0)

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Rename i386's Linux ELF to Linux ELF32

This is what amd64 calls the i386 Linux ABI in order to distinguish it
from the amd64 Linux ABI, and matches the nomenclature used for the
FreeBSD ABIs where t

Rename i386's Linux ELF to Linux ELF32

This is what amd64 calls the i386 Linux ABI in order to distinguish it
from the amd64 Linux ABI, and matches the nomenclature used for the
FreeBSD ABIs where they always have the size suffix in the name.

Reviewed by: trasz
Differential Revision: https://reviews.freebsd.org/D27647

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Linuxolator: Replace use of eventhandlers by sysent hooks.

Reviewed by: markj
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D27309

Fix misnomer - linux_to_bsd_errno() does the exact opposite.

Reported by: arichardson
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26965

Get rid of sa->narg. It serves no purpose; use sa->callp->sy_narg instead.

Reviewed by: kib
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D26458

Get rid of sv_errtbl and SV_ABI_ERRNO().

Reviewed by: kib
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D26388

Move SV_ABI_ERRNO translation into linux-specific code, to simplify
the syscall path and declutter it a bit. No functional changes intended.

Reviewed by: kib (earlier version)
MFC after: 2 weeks
Sp

Move SV_ABI_ERRNO translation into linux-specific code, to simplify
the syscall path and declutter it a bit. No functional changes intended.

Reviewed by: kib (earlier version)
MFC after: 2 weeks
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D26378

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i386: clean up empty lines in .c and .h files

Convert canary, execpathp, and pagesizes to pointers.

Use AUXARGS_ENTRY_PTR to export these pointers. This is a followup to
r359987 and r359988.

Reviewed by: jhb
Obtained from: CheriBSD
Sponsored

Convert canary, execpathp, and pagesizes to pointers.

Use AUXARGS_ENTRY_PTR to export these pointers. This is a followup to
r359987 and r359988.

Reviewed by: jhb
Obtained from: CheriBSD
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D24446

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Add compat.linux.emul_path, so it can be set to something other
than "/compat/linux". Useful when you have several compat directories
with different Linux versions and you don't want to clash with f

Add compat.linux.emul_path, so it can be set to something other
than "/compat/linux". Useful when you have several compat directories
with different Linux versions and you don't want to clash with files
installed by linux-c7 packages.

Reviewed by: bcr (manpages)
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D22574

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Copy out aux args after the argument and environment vectors.

Partially revert r354741 and r354754 and go back to allocating a
fixed-size chunk of stack space for the auxiliary vector. Keep
sv_copy

Copy out aux args after the argument and environment vectors.

Partially revert r354741 and r354754 and go back to allocating a
fixed-size chunk of stack space for the auxiliary vector. Keep
sv_copyout_auxargs but change it to accept the address at the end of
the environment vector as an input stack address and no longer
allocate room on the stack. It is now called at the end of
copyout_strings after the argv and environment vectors have been
copied out.

This should fix a regression in r354754 that broke the stack alignment
for newer Linux amd64 binaries (and probably broke Linux arm64 as
well).

Reviewed by: kib
Tested on: amd64 (native, linux64 (only linux-base-c7), and i386)
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D22695

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Use uintptr_t instead of register_t * for the stack base.

- Use ustringp for the location of the argv and environment strings
and allow destp to travel further down the stack for the stackgap
an

Use uintptr_t instead of register_t * for the stack base.

- Use ustringp for the location of the argv and environment strings
and allow destp to travel further down the stack for the stackgap
and auxv regions.
- Update the Linux copyout_strings variants to move destp down the
stack as was done for the native ABIs in r263349.
- Stop allocating a space for a stack gap in the Linux ABIs. This
used to hold translated system call arguments, but hasn't been used
since r159992.

Reviewed by: kib
Tested on: md64 (amd64, i386, linux64), i386 (i386, linux)
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D22501

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Check for errors from copyout() and suword*() in sv_copyout_args/strings.

Reviewed by: brooks, kib
Tested on: amd64 (amd64, i386, linux64), i386 (i386, linux)
Sponsored by: DARPA
Differential Revisi

Check for errors from copyout() and suword*() in sv_copyout_args/strings.

Reviewed by: brooks, kib
Tested on: amd64 (amd64, i386, linux64), i386 (i386, linux)
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D22401

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Use a sv_copyout_auxargs hook in the Linux ELF ABIs.

Reviewed by: emaste
Tested on: amd64 (linux64 only), i386
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D22356

Make linux(4) create /dev/shm. Linux applications often expect
a tmpfs to be mounted there, and because they like to verify it's
actually a mountpoint, a symlink won't do.

Reviewed by: dchagin (ear

Make linux(4) create /dev/shm. Linux applications often expect
a tmpfs to be mounted there, and because they like to verify it's
actually a mountpoint, a symlink won't do.

Reviewed by: dchagin (earlier version)
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D20333

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linux: futex_mtx should follow futex_list

Move futex_mtx to linux_common.ko for amd64 and aarch64 along
with respective list/mutex init/destroy.

PR: 240989
Reported by: Alex S <[email protected]>

Linuxulator depends on a fundamental kernel settings such as SMP. Many
of them listed in opt_global.h which is not generated while building
modules outside of a kernel and such modules never match re

Linuxulator depends on a fundamental kernel settings such as SMP. Many
of them listed in opt_global.h which is not generated while building
modules outside of a kernel and such modules never match real cofigured
kernel.

So, we should prevent our users from building obviously defective modules.

Therefore, remove the root cause of the building of modules outside of a
kernel - the possibility of building modules with DEBUG or KTR flags.
And remove all of DEBUG printfs as it is incomplete and in threaded
programms not informative, also a half of system call does not have DEBUG
printf. For debuging Linux programms we have dtrace, ktr and ktrace ability.

PR: 222861
Reviewed by: trasz
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D20178

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Remove sv_pagesize, originally introduced with r100384.

In all of the architectures we have today, we always use PAGE_SIZE.
While in theory one could define different things, none of the
current arc

Remove sv_pagesize, originally introduced with r100384.

In all of the architectures we have today, we always use PAGE_SIZE.
While in theory one could define different things, none of the
current architectures do, even the ones that have transitioned from
32-bit to 64-bit like i386 and arm. Some ancient mips binaries on
other systems used 8k instead of 4k, but we don't support running
those and likely never will due to their age and obscurity.

Reviewed by: imp (who also contributed the commit message)
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D19280

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Remove iBCS2, part2: general kernel

Reviewed by: kib (previous version)
Sponsored by: The FreeBSD Foundation

Fix the Linux kernel version number calculation

The Linux compatibility code was converting the version number (e.g.
2.6.32) in two different ways and then comparing the results.

The linux_map_osre

Fix the Linux kernel version number calculation

The Linux compatibility code was converting the version number (e.g.
2.6.32) in two different ways and then comparing the results.

The linux_map_osrel() function converted MAJOR.MINOR.PATCH similar to
what FreeBSD does natively. I.e. where major=v0, minor=v1, and patch=v2
v = v0 * 1000000 + v1 * 1000 + v2;

The LINUX_KERNVER() macro, on the other hand, converted the value with
bit shifts. I.e. where major=a, minor=b, and patch=c
v = (((a) << 16) + ((b) << 8) + (c))

The Linux kernel uses the later format via the KERNEL_VERSION() macro in
include/generated/uapi/linux/version.h

Fix is to use the LINUX_KERNVER() macro in linux_map_osrel() as well as
in the .trans_osrel functions.

PR: 229209
Reviewed by: emaste, cem, imp (mentor)
Approved by: imp (mentor)
Differential Revision: https://reviews.freebsd.org/D15952

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