| Commit message (Collapse) | Author | Age | Files | Lines |
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Instead of fail trying to build the compare source file.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Matheus Castanho <msc@linux.ibm.com>
Reviewed-by: Matheus Castanho <msc@linux.ibm.com>
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This definition is only used as a fallback with old kernel headers.
The change follows kernel commit bfdf4e6208051ed7165b2e92035b4bf11
("rseq: Remove broken uapi field layout on 32-bit little endian").
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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LoongArch is going to be the first architecture supported by Linux that
has neither fstat* nor newfstatat [1], instead exclusively relying on
statx. So in fstatat64's implementation, we need to also enable statx
usage if neither fstatat64 nor newfstatat is present, to prepare for
this new case of kernel ABI.
[1]: https://lore.kernel.org/all/20220518092619.1269111-1-chenhuacai@loongson.cn/
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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Linux 5.18 adds a constant MADV_DONTNEED_LOCKED (defined in multiple
header files, but with the same value on all architectures). Add this
constant to bits/mman-linux.h.
Tested for x86_64.
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Linux 5.18 defines a new AArch64 HWCAP value HWCAP2_MTE3; add it to
glibc's sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h.
Tested with build-many-glibcs.py for aarch64-linux-gnu.
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Linux 5.18 adds a constant SOL_SMC to the getsockopt / setsockopt
levels; add this constant to bits/socket.h.
Tested for x86_64.
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This patch updates the kernel version in the tests tst-mman-consts.py
and tst-pidfd-consts.py to 5.18. (There are no new constants covered
by these tests in 5.18, or in 5.17 in the case of tst-pidfd-consts.py
that previously used version 5.16, that need any other header
changes.)
Tested with build-many-glibcs.py.
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Linux 5.18 has no new syscalls. Update the version number in
syscall-names.list to reflect that it is still current for 5.18.
Tested with build-many-glibcs.py.
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It was added in commit 769071ac9f20b6a447410c7eaa55d1a5233ef40c.
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To check for the pidfd functions pidfd_open, pidfd_getfd, pid_send_signal,
and waitid with P_PIDFD.
Checked on x86_64-linux-gnu and i686-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
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It was added on Linux 5.4 (3695eae5fee0605f316fbaad0b9e3de791d7dfaf)
to extend waitid to wait on pidfd.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
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This was added on Linux 5.1(3eb39f47934f9d5a3027fe00d906a45fe3a15fad)
as a way to avoid the race condition of using kill (where PID might be
reused by the kernel between between obtaining the pid and sending the
signal).
If the siginfo_t argument is NULL then pidfd_send_signal is equivalent
to kill. If it is not NULL pidfd_send_signal is equivalent to
rt_sigqueueinfo.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
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This was added on Linux 5.6 (8649c322f75c96e7ced2fec201e123b2b073bf09)
as a way to retrieve a file descriptors for another process though
pidfd (created either with CLONE_PIDFD or pidfd_getfd). The
functionality is similar to recvmmsg SCM_RIGHTS.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
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This was added on Linux 5.3 (32fcb426ec001cb6d5a4a195091a8486ea77e2df)
as a way to retrieve a pid file descriptors for process that has not
been created CLONE_PIDFD (by usual fork/clone).
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
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This is for bug 23293 and it relies on the glibc test system running
tests via explicit ld.so invokation by default.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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_dl_skip_args is always 0, so the target specific code that modifies
argv after relro protection is applied is no longer used.
After the patch relro protection is applied to _dl_argv consistently
on all targets.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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The Linux version used by i686 and m68k provide three overrrides for
generic code:
1. DISTINGUISH_LIB_VERSIONS to print additional information when
libc5 is used by a dependency.
2. EXTRA_LD_ENVVARS to that enabled LD_LIBRARY_VERSION environment
variable.
3. EXTRA_UNSECURE_ENVVARS to add two environment variables related
to aout support.
None are really requires, it has some decades since libc5 or aout
suppported was removed and Linux even remove support for aout files.
The LD_LIBRARY_VERSION is also dead code, dl_correct_cache_id is not
used anywhere.
Checked on x86_64-linux-gnu and i686-linux-gnu.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
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Now that it was removed on libc.so.
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The kernel version check is used to avoid glibc to run on older
kernels where some syscall are not available and fallback code are
not enabled to handle graciously fail. However, it does not prevent
if the kernel does not correctly advertise its version through
vDSO note, uname or procfs.
Also kernel version checks are sometime not desirable by users,
where they want to deploy on different system with different kernel
version knowing the minimum set of syscall is always presented on
such systems.
The kernel version check has been removed along with the
LD_ASSUME_KERNEL environment variable. The minimum kernel used to
built glibc is still provided through NT_GNU_ABI_TAG ELF note and
also printed when libc.so is issued.
Checked on x86_64-linux-gnu.
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Currently on Linux __get_nprocs_conf first tries to enumerate the
cpus present in the system by iterating on /sys/devices/system/cpuX
directories. This only enumerates the CPUs that are present in
system (but possibly offline), not taking in account possible CPU
that might added in the system through hotplugging.
Linux provides the maximum number of configured cpus on the
/sys/devices/system/cpu file. Although it might present a larger
value of possible active CPUs on some system (where kernel either
get the information from firmaware or is configured at boot time),
the information is what kernel presents to userland.
This also change the returned value of _SC_NPROCESSORS_CONF, which
aligns as the maximum configure cpu in the system.
Checked on x86_64-linux-gnu.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
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This implements mmap fallback for a brk failure during TLS
allocation.
scripts/tls-elf-edit.py is updated to support the new patching method.
The script no longer requires that in the input object is of ET_DYN
type.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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Alpha and sparc can now use the generic implementation.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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The siglist.c is built with -fno-toplevel-reorder to avoid compiler
to reorder the compat assembly directives due an assembler
issue [1] (fixed on 2.39).
This patch removes the compiler flags by split the compat symbol
generation in two phases. First the __sys_siglist and __sys_sigabbrev
without any compat symbol directive is preprocessed to generate an
assembly source code. This generate assembly is then used as input
on a platform agnostic siglist.S which then creates the compat
definitions. This prevents compiler to move any compat directive
prior the _sys_errlist definition itself.
Checked on a make check run-built-tests=no on all affected ABIs.
Reviewed-by: Fangrui Song <maskray@google.com>
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The errlist.c is built with -fno-toplevel-reorder to avoid compiler to
reorder the compat assembly directives due an assembler issue [1]
(fixed on 2.39).
This patch removes the compiler flags by split the compat symbol
generation in two phases. First the _sys_errlist_internal internal
without any compat symbol directive is preprocessed to generate an
assembly source code. This generate assembly is then used as input
on a platform agnostic errlist-data.S which then creates the compat
definitions. This prevents compiler to move any compat directive
prior the _sys_errlist_internal definition itself.
Checked on a make check run-built-tests=no on all affected ABIs.
[1] https://sourceware.org/bugzilla/show_bug.cgi?id=29012
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On i386 and ia64, the TCB is not available at this point.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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And keep the previous definition if it exists. This allows
disabling IA64_USE_NEW_STUB while keeping USE_DL_SYSINFO defined.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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The __clone_internal returns the error on errno.
Checked on x86_64-linux-gnu.
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clock_adjtime()/clock_adjtime64()
Add __nonnull((2)) to avoid null pointer access.
Link: https://sourceware.org/bugzilla/show_bug.cgi?id=27662
Link: https://sourceware.org/bugzilla/show_bug.cgi?id=29084
Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com>
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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ntp_gettime()
ntp_gettime64()
ntp_gettimex()
ntp_gettimex64()
ntp_adjtime()
Add __nonnull((1)) to avoid null pointer access.
Link: https://sourceware.org/bugzilla/show_bug.cgi?id=27662
Link: https://sourceware.org/bugzilla/show_bug.cgi?id=29084
Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com>
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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Add __nonnull((1)) to the adjtimex()/adjtimex64() function declaration
to avoid null pointer access.
Link: https://sourceware.org/bugzilla/show_bug.cgi?id=27662
Link: https://sourceware.org/bugzilla/show_bug.cgi?id=29084
Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com>
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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Unlike MMAP_CALL, this avoids a TCB dependency for an errno update
on failure.
<mmap_internal.h> cannot be included as is on several architectures
due to the definition of page_unit, so introduce a separate header
file for the definition of MMAP_CALL and MMAP_CALL_INTERNAL,
<mmap_call.h>.
Reviewed-by: Stefan Liebler <stli@linux.ibm.com>
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Introduce an int-80h-based version of __libc_do_syscall and use
it if I386_USE_SYSENTER is defined as 0.
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
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After commit a78e6a10d0b50d0ca80309775980fc99944b1727
("i386: Remove broken CAN_USE_REGISTER_ASM_EBP (bug 28771)"),
it is never defined.
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
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The AT_SYMLINK_NOFOLLOW emulation ues the default 32 bit stat internal
calls, which fails with EOVERFLOW if the file constains timestamps
beyond 2038.
Checked on i686-linux-gnu.
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Copied from gnulib/lib/glob.c in order to fix rhbz 1982608
Also fixes swbz 25659
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
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These are two missing spots initially done by 52a5fe70a2c77935.
Checked on i686-linux-gnu.
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This is necessary to place the libio vtables into the RELRO segment.
New tests elf/tst-relro-ldso and elf/tst-relro-libc are added to
verify that this is what actually happens.
The new tests fail on ia64 due to lack of (default) RELRO support
inbutils, so they are XFAILed there.
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After 73fc4e28b9464f0e13edc719a5372839970e7ddb,
__libc_enable_secure_decided is always 0 and a statically linked
executable may overwrite __libc_enable_secure without considering
AT_SECURE.
The __libc_enable_secure has been correctly initialized in _dl_aux_init,
so just remove __libc_enable_secure_decided and __libc_init_secure.
This allows us to remove some startup_get*id functions from
22b79ed7f413cd980a7af0cf258da5bf82b6d5e5.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
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Add missing support initially added by 4e8521333bea6e89fcef1020
(which missed n32 stat).
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On 32-bit machines this has no affect. On 64-bit machines
{u}int_fast{16|32} are set as {u}int64_t which is often not
ideal. Particularly x86_64 this change both saves code size and
may save instruction cost.
Full xcheck passes on x86_64.
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start_addresses in sysdeps/powerpc/powerpc64/start.S is historical
baggage that should disappear. Until someone does that, relocating
stinfo->main by hand is one solution to the fact that the field may be
unrelocated at the time it is accessed. This is similar to what is
done for dynamic tags via the D_PTR macro. stinfo->init and
stinfo->fini are zero in both powerpc64/start.S and powerpc32/start.S,
so make it a little more obvious they are unused by passing NULLs to
LIBC_START_MAIN. The makefile change is needed to pick up
elf/dl-static-tls.h from dl-machine.h.
Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
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Compilers may decide to put the rfv variable in .data rather than on
the stack. It's slightly better to put it in .data.rel.ro.local
instead. Regardles of that, making it const may enable further
optimisations. Found when examining relative relocations (GOT ones
in particular) as part of enabling static-pie for PowerPC64.
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The __closefrom_fallback tries to get a available file descriptor
if the initial open ("/proc/self/fd/", ...) fails. It assumes the
failure would be only if procfs is not mount (ENOENT), however if
the the proc file is not accessible (due some other kernel filtering
such apparmor) it will iterate over a potentially large file set
issuing close calls.
It should only try the close fallback if open returns EMFILE,
ENFILE, or ENOMEM.
Checked on x86_64-linux-gnu.
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Add the new HWCAP2_AFP and HWCAP2_RPRES constants from Linux 5.17.
Tested with build-many-glibcs.py for aarch64-linux-gnu.
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This patch updates the kernel version in the test tst-mman-consts.py
to 5.17. (There are no new MAP_* constants covered by this test in
5.17 that need any other header changes.)
Tested with build-many-glibcs.py.
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Linux 5.17 has one new syscall, set_mempolicy_home_node. Update
syscall-names.list and regenerate the arch-syscall.h headers with
build-many-glibcs.py update-syscalls.
Tested with build-many-glibcs.py.
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It is only called for legacy ABIs.
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When swapcontext.c is compiled without -g, the following error occurs:
Error: CFI instruction used without previous .cfi_startproc
Fix by converting swapcontext routine to assembler.
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This patch adds write access function attributes to the epoll_wait family of
functions
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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