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* linux: Add mount_setattrAdhemerval Zanella2022-07-0538-4/+87
| | | | | | | | | | It was added on Linux 5.12 (2a1867219c7b27f928e2545782b86daaf9ad50bd) to allow change the properties of a mount or a mount tree using file descriptors which the new mount api is based on. Checked on x86_64-linux-gnu. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* linux: Add tst-mount to check for Linux new mount APIAdhemerval Zanella2022-07-052-0/+96
| | | | | | | | | | | | The new mount API was added on Linux 5.2 with six new syscalls: fsopen, fsconfig, fsmount, move_mount, fspick, and open_tree. The new test verifies minimal functionality along with error paths for specific arguments and their corner cases. Checked on x86_64-linux-gnu. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* linux: Add open_treeAdhemerval Zanella2022-07-0537-1/+46
| | | | | | | It was added on Linux 5.2 (a07b20004793d8926f78d63eb5980559f7813404) to return a O_PATH-opened file descriptor to an existing mountpoint. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* linux: Add fspickAdhemerval Zanella2022-07-0536-0/+47
| | | | | | | | | It was added on Linux 5.2 (cf3cba4a429be43e5527a3f78859b1bfd9ebc5fb) that can be used to pick an existing mountpoint into an filesystem context which can thereafter be used to reconfigure a superblock with fsconfig syscall. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* linux: Add fsconfigAdhemerval Zanella2022-07-0537-0/+63
| | | | | | | | | | | | | It was added on Linux 5.2 (ecdab150fddb42fe6a739335257949220033b782) as a way to a configure filesystem creation context and trigger actions upon it, to be used in conjunction with fsopen, fspick and fsmount. The fsconfig_command commands are currently only defined as an enum, so they can't be checked on tst-mount-consts.py with current test support. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* Refactor internal-signals.hAdhemerval Zanella2022-06-305-41/+145
| | | | | | | | | | | | | | | | | | The main drive is to optimize the internal usage and required size when sigset_t is embedded in other data structures. On Linux, the current supported signal set requires up to 8 bytes (16 on mips), was lower than the user defined sigset_t (128 bytes). A new internal type internal_sigset_t is added, along with the functions to operate on it similar to the ones for sigset_t. The internal-signals.h is also refactored to remove unused functions Besides small stack usage on some functions (posix_spawn, abort) it lower the struct pthread by about 120 bytes (112 on mips). Checked on x86_64-linux-gnu. Reviewed-by: Arjun Shankar <arjun@redhat.com>
* AArch64: Add asymmetric faulting mode for tag violations in mem.tagging tunableTejas Belagod2022-06-301-1/+7
| | | | | | | | | The new asymmetric mode is available when HWCAP2_MTE3 is set (support is available), bit2 is set in the tunable (user request per application), and the system is configured such that the asymmetric mode is preferred over sync or async (per-cpu system-wide setting). Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* linux: Fix mq_timereceive check for 32 bit fallback code (BZ 29304)Adhemerval Zanella2022-06-301-1/+1
| | | | | | | | On success, mq_receive() and mq_timedreceive() return the number of bytes in the received message, so it requires to check if the value is larger than 0. Checked on i686-linux-gnu.
* linux: Remove unnecessary nice.c and signal.cArjun Shankar2022-06-302-4/+0
| | | | | | | | | These files simply include the sysdeps/posix implementations which would be used even in the absence of the files. They have been unnecessary since 7b17aeda0c5e when nice and signal were removed from the syscalls.list file. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Linux: Forward declaration of struct iovec for process_madviseFlorian Weimer2022-06-291-5/+2
| | | | | | | | | | | | | This maintains compatibility between <sys/mman.h> and <linux/uio.h>. Before that, the addition of process_madvise made those two header files incompatible. This has been observed resulting in a build failure in LLDB's Process/Linux/NativeRegisterContextLinux_s390x.cpp source file. Fixes commit d19ee3473d68ca0e794f3a8b7677a0983ae1342e ("linux: Add process_madvise"). Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* linux: Add move_mountAdhemerval Zanella2022-06-2437-1/+55
| | | | | | | | | It was added on Linux 5.2 (2db154b3ea8e14b04fee23e3fdfd5e9d17fbc6ae) as way t move a mount from one place to another and, in the next commit, allow to attach an unattached mount tree. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* linux: Add fsmountAdhemerval Zanella2022-06-2437-1/+59
| | | | | | | | | | It was added on 5.2 (93766fbd2696c2c4453dd8e1070977e9cd4e6b6d) to provide a way by which a filesystem opened with fsopen and configured by a series of fsconfig calls can have a detached mount object created for it. Tested-by: Carlos O'Donell <carlos@redhat.com> Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* linux: Add fsopenAdhemerval Zanella2022-06-2438-0/+107
| | | | | | | | | It was added on Linux 5.2 (24dcb3d90a1f67fe08c68a004af37df059d74005) to start the process of preparing to create a superblock that will then be mountable, using an fd as a context handle. Tested-by: Carlos O'Donell <carlos@redhat.com> Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* linux: Add process_mreleaseAdhemerval Zanella2022-06-0238-0/+124
| | | | | | | | | Added in Linux 5.15 (884a7e5964e06ed93c7771c0d7cf19c09a8946f1), the new syscalls allows a caller to free the memory of a dying target process. Checked on x86_64-linux-gnu. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* linux: Add process_madviseAdhemerval Zanella2022-06-0238-0/+214
| | | | | | | | | | It was added on Linux 5.10 (ecb8ac8b1f146915aa6b96449b66dd48984caacc) with the same functionality as madvise but using a pidfd of the target process. Checked on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* linux: Set tst-pidfd-consts unsupported for kernels headers older than 5.10Adhemerval Zanella2022-06-021-0/+3
| | | | | | | | 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>
* Linux: Adjust struct rseq definition to current kernel versionFlorian Weimer2022-06-021-22/+6
| | | | | | | | 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>
* linux: use statx for fstat if neither newfstatat nor fstatat64 is presentWANG Xuerui2022-06-011-1/+2
| | | | | | | | | | | | 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>
* Add MADV_DONTNEED_LOCKED from Linux 5.18 to bits/mman-linux.hJoseph Myers2022-06-011-0/+2
| | | | | | | | 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.
* Add HWCAP2_MTE3 from Linux 5.18 to AArch64 bits/hwcap.hJoseph Myers2022-06-011-0/+1
| | | | | | | 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.
* Add SOL_SMC from Linux 5.18 to bits/socket.hJoseph Myers2022-05-311-0/+1
| | | | | | | Linux 5.18 adds a constant SOL_SMC to the getsockopt / setsockopt levels; add this constant to bits/socket.h. Tested for x86_64.
* Update kernel version to 5.18 in header constant testsJoseph Myers2022-05-262-2/+2
| | | | | | | | | | 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.
* Update syscall-names.list for Linux 5.18Joseph Myers2022-05-251-2/+2
| | | | | | | 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.
* linux: Add CLONE_NEWTIME from Linux 5.6 to bits/sched.hAdhemerval Zanella2022-05-231-0/+4
| | | | It was added in commit 769071ac9f20b6a447410c7eaa55d1a5233ef40c.
* linux: Add tst-pidfd.cAdhemerval Zanella2022-05-172-0/+173
| | | | | | | | | | 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>
* linux: Add P_PIDFDAdhemerval Zanella2022-05-171-0/+14
| | | | | | | | 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>
* linux: Add pidfd_send_signalAdhemerval Zanella2022-05-1736-0/+43
| | | | | | | | | | | | | | 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>
* linux: Add pidfd_getfdAdhemerval Zanella2022-05-1736-0/+43
| | | | | | | | | | 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>
* linux: Add pidfd_openAdhemerval Zanella2022-05-1738-1/+129
| | | | | | | | | 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>
* linux: Add a getauxval test [BZ #23293]Szabolcs Nagy2022-05-172-0/+75
| | | | | | | | 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>
* rtld: Remove DL_ARGV_NOT_RELRO and make _dl_skip_args constSzabolcs Nagy2022-05-171-4/+0
| | | | | | | | | | | _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>
* Remove dl-librecon.h header.Adhemerval Zanella2022-05-162-60/+0
| | | | | | | | | | | | | | | | | | | | | | | 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>
* elf: Remove ldconfig kernel version checkAdhemerval Zanella2022-05-168-80/+64
| | | | Now that it was removed on libc.so.
* Remove kernel version checkAdhemerval Zanella2022-05-167-186/+7
| | | | | | | | | | | | | | | | | | | | 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.
* linux: Use /sys/devices/system/cpu on __get_nprocs_conf (BZ#28991)Adhemerval Zanella2022-05-161-32/+4
| | | | | | | | | | | | | | | | | | | | | 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>
* csu: Implement and use _dl_early_allocate during static startupFlorian Weimer2022-05-161-0/+82
| | | | | | | | | | | 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>
* Linux: Introduce __brk_call for invoking the brk system callFlorian Weimer2022-05-165-78/+71
| | | | | | Alpha and sparc can now use the generic implementation. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* stdio: Remove the usage of $(fno-unit-at-a-time) for siglist.cAdhemerval Zanella2022-05-131-2/+5
| | | | | | | | | | | | | | | | | | 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>
* stdio: Remove the usage of $(fno-unit-at-a-time) for errlist.cAdhemerval Zanella2022-05-136-12/+21
| | | | | | | | | | | | | | | | | | 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
* Linux: Implement a useful version of _startup_fatalFlorian Weimer2022-05-093-19/+65
| | | | | | On i386 and ia64, the TCB is not available at this point. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* ia64: Always define IA64_USE_NEW_STUB as a flag macroFlorian Weimer2022-05-092-13/+15
| | | | | | | 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>
* linux: Fix posix_spawn return code if clone fails (BZ#29109)Adhemerval Zanella2022-05-061-1/+1
| | | | | | The __clone_internal returns the error on errno. Checked on x86_64-linux-gnu.
* clock_adjtime: Use __nonnull to avoid null pointerXiaoming Ni2022-05-052-3/+3
| | | | | | | | | | 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>
* ntp_xxxtimex: Use __nonnull to avoid null pointerXiaoming Ni2022-05-052-8/+8
| | | | | | | | | | | | | | 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>
* adjtimex/adjtimex64: Use __nonnull to avoid null pointerXiaoming Ni2022-05-052-4/+4
| | | | | | | | | | 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>
* Linux: Define MMAP_CALL_INTERNALFlorian Weimer2022-05-043-12/+30
| | | | | | | | | | | | 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>
* i386: Honor I386_USE_SYSENTER for 6-argument Linux system callsFlorian Weimer2022-05-043-3/+37
| | | | | | | 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>
* i386: Remove OPTIMIZE_FOR_GCC_5 from Linux libc-do-syscall.SFlorian Weimer2022-05-041-3/+0
| | | | | | | | 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>
* linux: Fix fchmodat with AT_SYMLINK_NOFOLLOW for 64 bit time_t (BZ#29097)Adhemerval Zanella2022-04-281-2/+2
| | | | | | | | 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.
* posix/glob.c: update from gnulibDJ Delorie2022-04-271-0/+1
| | | | | | | | 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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