According to pselect6 manual, on error timeout becomes undefined, by fact
Linux modifies the timeout and ignore EFAULT error if so.
MFC after: 2 weeks
(cherry picked from commit 5171ed79f6)
To avoid annoyng messages from glibc-2.35 test suite add the simple
implementation of rseq syscall which is do nothing for now.
I plan to implement it if and when the API stabilizes.
MFC after: 2 weeks
(cherry picked from commit ee55d560e8)
Created a couple of helpers to send signals to the specific thread or to
the whole process. Use helpers in the corresponding syscalls.
This fixes the confusion where a signal destined for a whole process
was sent to a specific thread and vice versa.
There is an exclusion for the linux_kill() syscall that takes a pid
argument and should send a signal to the whole process, but I know
at least one example where kill() takes tid.
MFC after: 2 weeks
(cherry picked from commit 6201a50d0d)
This file holds a UUID that is invariant for every boot. In our case, it is
invariant per mount.
PR: 262369
Reported by: sodynet1@gmail.com
Approved by: dchagin@
Differential Revision: https://reviews.freebsd.org/D34860
(cherry picked from commit 0f2041a5b0)
To avoid annoyng messages from LTP test suites add the simple
implementation of /proc/self/oom_score_adj which is do nothing.
Reviewed by: emaste
Differential revision: https://reviews.freebsd.org/D34710
MFC after: 2 weeks
(cherry picked from commit b7df7b987e)
Historically 32-bit Linuxulator under amd64 emulated the real i386
behavior. Since 3d8dd983 the old i386 Linux world can't be used under
amd64 Linuxulator as it don't know anything about amd64 machine (which
is returned now by newuname() syscall). So, add a knob to allow to swith
the behavior and use i386 Linux binaries on amd64.
Set knob to the new behavior as I think this is common to the modern
Linux distros.
Reviewed by: Pau Amma (doc), emaste
Differential revision: https://reviews.freebsd.org/D34708
MFC after: 2 weeks
(cherry picked from commit d5dc757e84)
Avoid calculating d_off value as it is specific to the underlying filesystem
and can be used by others API, like lseek(), seekdir() as input offset.
Differential revision: https://reviews.freebsd.org/D31551
MFC after: 2 weeks
(cherry picked from commit 099fa2feb3)
Since Linux 5.4, if id is zero, then wait for any child that is in the same
process grop as the caller's process group.
Differential revision: https://reviews.freebsd.org/D31567
MFC after: 2 weeks
(cherry picked from commit 4e3aefb923)
As FreeBSD does not have __WALL option bit analogue explicitly set all
possible option bits to emulate Linux __WALL wait option bit.
Reviewed by: emaste
Differential revision: https://reviews.freebsd.org/D31555
MFC after: 2 weeks
(cherry picked from commit c7ef7c3fac)
Also fix bug in waitid() implementation, use wru_self not wru_children.
Differential revision: https://reviews.freebsd.org/D31552
MFC after: 2 weeks
(cherry picked from commit 0c6b1ff7de)
Specific to Linux AT_NO_AUTOMOUNT flag tells the kernel to not automount the
terminal component of pathname if it is a directory that is an automount point.
As it is the default for FreeBSD silencly ignore this flag.
glibc-2.34 uses this flag in the stat64 system calls which is used by i386.
Reviewed by: trasz
Differential revision: https://reviews.freebsd.org/D31524
MFC after: 2 weeks
(cherry picked from commit ff39d74aa9)
Don't emit messages; this isn't any different from a Linux kernel
built without OPTIONS_SECCOMP, so the userspace already needs to know
how to deal with it. This is also similar with how we handle seccomp
in linux_prctl().
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D33808
(cherry picked from commit 99454d3e98)
Drop some unnecessary includes from Linuxulator ptrace
and coredump code. No functional changes.
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D32925
(cherry picked from commit 06d5ef0aad)
This moves linux_ptrace.c from sys/amd64/linux/ to sys/compat/linux/,
making it possible to use it on architectures other than amd64.
It also enables Linux ptrace(2) on arm64.
Relnotes: yes
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D32868
(cherry picked from commit a90ff3c4bc)
Modern style(9) allows variables initialization where they are declared,
but in this case initialization obfuscate the code.
MFC after: 2 weeks
(cherry picked from commit 1af0780b5f)
