Sync with upstream branch release/2.34/master,
Linux: Detect user namespace support in io/tst-getcwd-smallbuff
realpath: Avoid overwriting preexisting error
CVE-2021-3999: getcwd: Set errno to ERANGE for size == 1
tst-realpath-toolong: Fix hurd build
CVE-2021-3998: realpath: ENAMETOOLONG for result larger than PATH_MAX
stdlib: Fix formatting of tests list in Makefile
stdlib: Sort tests in Makefile
support: Add helpers to create paths longer than PATH_MAX
powerpc: Fix unrecognized instruction errors with recent binutils
x86: use default cache size if it cannot be determined [BZ #28784]
CVE-2022-23218: Buffer overflow in sunrpc svcunix_create (bug 28768)
sunrpc: Test case for clnt_create "unix" buffer overflow (bug 22542)
CVE-2022-23219: Buffer overflow in sunrpc clnt_create for "unix" (bug 22542)
socket: Add the __sockaddr_un_set function
Disable debuginfod in printer tests [BZ #28757]
Update syscall lists for Linux 5.16

More reliable CPU compatibility diagnostics (#2040657)

Optionally accelerate sched_getcpu using rseq (#2024347)

Backport optimized ELF dependency sorting algorithm (#2032647)

Sync with upstream branch release/2.34/master,
i386: Remove broken CAN_USE_REGISTER_ASM_EBP (bug 28771)
Update syscall lists for Linux 5.15
powerpc: Fix unrecognized instruction errors with recent GCC
timezone: test-case for BZ #28707
timezone: handle truncated timezones from tzcode-2021d and later (BZ #28707)
Fix subscript error with odd TZif file [BZ #28338]
AArch64: Check for SVE in ifuncs [BZ #28744]
intl/plural.y: Avoid conflicting declarations of yyerror and yylex
Linux: Fix 32-bit vDSO for clock_gettime on powerpc32
linux: Add sparck brk implementation
Update sparc libm-test-ulps
Update hppa libm-test-ulps
riscv: align stack before calling _dl_init [BZ #28703]
riscv: align stack in clone [BZ #28702]
powerpc64[le]: Allocate extra stack frame on syscall.S
elf: Fix tst-cpu-features-cpuinfo for KVM guests on some AMD systems [BZ #28704]
nss: Use "files dns" as the default for the hosts database (bug 28700)
arm: Guard ucontext _rtld_global_ro access by SHARED, not PIC macro
mips: increase stack alignment in clone to match the ABI
mips: align stack in clone [BZ #28223]

Enable PIE by default on all architectures (#1988382)

Sync with upstream branch release/2.34/master,
pthread/tst-cancel28: Fix barrier re-init race condition
Use $(pie-default) with conformtest
Run conform/ tests using newly built libc
nptl: Add one more barrier to nptl/tst-create1

x86-64: Remove LD_PREFER_MAP_32BIT_EXEC support (#2029410)

Add /usr/bin/ld.so --list-diagnostics (#2023422)

backtrace function crashes without vDSO on ppc64le (#2027789)

Sync with upstream branch release/2.34/master,
powerpc64[le]: Fix CFI and LR save address for asm syscalls [BZ #28532]
linux: Use /proc/stat fallback for __get_nprocs_conf (BZ #28624)
nptl: Do not set signal mask on second setjmp return [BZ #28607]
s390: Use long branches across object boundaries (jgh instead of jh)
elf: Earlier missing dynamic segment check in _dl_map_object_from_fd
gconv: Do not emit spurious NUL character in ISO-2022-JP-3 (bug 28524)

Create /{bin,lib,lib64,sbin} as symbolic links in test-container

Sync with upstream branch release/2.34/master,
Avoid warning: overriding recipe for .../tst-ro-dynamic-mod.so
ld.so: Initialize bootstrap_map.l_ld_readonly [BZ #28340]
ld.so: Replace DL_RO_DYN_SECTION with dl_relocate_ld [BZ #28340]
Handle NULL input to malloc_usable_size [BZ #28506]
elf: Avoid deadlock between pthread_create and ctors [BZ #28357]
timex: Use 64-bit fields on 32-bit TIMESIZE=64 systems (BZ #28469)
y2038: Use a common definition for stat for sparc32
elf: Replace nsid with args.nsid [BZ #27609]
S390: Add PCI_MIO and SIE HWCAPs
support: Also return fd when it is 0

Sync with upstream branch release/2.34/master,
Add missing braces to bsearch inline implementation [BZ #28400]
Suppress -Wcast-qual warnings in bsearch
linux: Revert the use of sched_getaffinity on get_nproc (BZ #28310)
linux: Simplify get_nprocs
misc: Add __get_nprocs_sched
nptl: pthread_kill must send signals to a specific thread [BZ #28407]
support: Add check for TID zero in support_wait_for_thread_exit

Sync with upstream branch release/2.34/master,
nptl: Avoid setxid deadlock with blocked signals in thread exit [BZ #28361]
Use support_open_dev_null_range io/tst-closefrom, misc/tst-close_range, and
spawn5 (BZ #28260)
support: Add support_open_dev_null_range
nptl: Fix type of pthread_mutexattr_getrobust_np,
nptl: pthread_kill needs to return ESRCH for old programs (bug 19193)