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* sysv: linux: Add 64-bit time_t variant for msgctlAdhemerval Zanella2020-07-091-0/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To provide a y2038 safe interface a new symbol __msgctl64 is added and __msgctl is change to call it instead (it adds some extra buffer coping for the 32 bit time_t implementation). Two new structures are added: 1. kernel_msqid64_ds: used internally only on 32-bit architectures to issue the syscall. A handful of architectures (hppa, i386, mips, powerpc32, and sparc32) require specific implementations due to their kernel ABI. 2. msqid_ds64: this is only for __TIMESIZE != 64 to use along with the 64-bit msgctl. It is different than the kernel struct because the exported 64-bit time_t might require different alignment depending on the architecture ABI. So the resulting implementation does: 1. For 64-bit architectures it assumes msqid_ds already contains 64-bit time_t fields and will result in just the __msgctl symbol using the __msgctl64 code. The msgid_ds argument is passed as-is to the syscall. 2. For 32-bit architectures with default 64-bit time_t (newer ABIs such riscv32 or arc), it will also result in only one exported symbol but with the required high/low time handling. 3. Finally for 32-bit architecture with both 32-bit and 64-bit time_t support we follow the already set way to provide one symbol with 64-bit time_t support and implement the 32-bit time_t support using the 64-bit time_t. The default 32-bit symbol will allocate and copy the msqid_ds over multiple buffers, but this should be deprecated in favor of the __msgctl64 anyway. Checked on i686-linux-gnu and x86_64-linux-gnu. I also did some sniff tests on powerpc, powerpc64, mips, mips64, armhf, sparcv9, and sparc64. Tested-by: Carlos O'Donell <carlos@redhat.com> Reviewed-by: Carlos O'Donell <carlos@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Tested-by: Alistair Francis <alistair.francis@wdc.com>
* sysv: linux: Add 64-bit time_t variant for semctlAdhemerval Zanella2020-07-091-0/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Different than others 64-bit time_t syscalls, the SysIPC interface does not provide a new set of syscall for y2038 safeness. Instead it uses unused fields in semid_ds structure to return the high bits for the timestamps. To provide a y2038 safe interface a new symbol __semctl64 is added and __semctl is change to call it instead (it adds some extra buffer copying for the 32 bit time_t implementation). Two new structures are added: 1. kernel_semid64_ds: used internally only on 32-bit architectures to issue the syscall. A handful of architectures (hppa, i386, mips, powerpc32, sparc32) require specific implementations due their kernel ABI. 2. semid_ds64: this is only for __TIMESIZE != 64 to use along with the 64-bit semctl. It is different than the kernel struct because the exported 64-bit time_t might require different alignment depending on the architecture ABI. So the resulting implementation does: 1. For 64-bit architectures it assumes semid_ds already contains 64-bit time_t fields and will result in just the __semctl symbol using the __semctl64 code. The semid_ds argument is passed as-is to the syscall. 2. For 32-bit architectures with default 64-bit time_t (newer ABIs such riscv32 or arc), it will also result in only one exported symbol but with the required high/low handling. It might be possible to optimize it further to avoid the kernel_semid64_ds to semun transformation if the exported ABI for the architectures matches the expected kernel ABI, but the implementation is already complex enough and don't think this should be a hotspot in any case. 3. Finally for 32-bit architecture with both 32-bit and 64-bit time_t support we follow the already set way to provide one symbol with 64-bit time_t support and implement the 32-bit time_t support using the 64-bit one. The default 32-bit symbol will allocate and copy the semid_ds over multiple buffers, but this should be deprecated in favor of the __semctl64 anyway. Checked on i686-linux-gnu and x86_64-linux-gnu. I also did some sniff tests on powerpc, powerpc64, mips, mips64, armhf, sparcv9, and sparc64. Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Tested-by: Alistair Francis <alistair.francis@wdc.com> Tested-by: Vineet Gupta <vgupta@synopsys.com> Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* string: Add strerrorname_np and strerrordesc_npAdhemerval Zanella2020-07-071-0/+2
| | | | | | | | | | | | | | | | | The strerrorname_np returns error number name (e.g. "EINVAL" for EINVAL) while strerrordesc_np returns string describing error number (e.g "Invalid argument" for EINVAL). Different than strerror, strerrordesc_np does not attempt to translate the return description, both functions return NULL for an invalid error number. They should be used instead of sys_errlist and sys_nerr, both are thread and async-signal safe. These functions are GNU extensions. Checked on x86-64-linux-gnu, i686-linux-gnu, powerpc64le-linux-gnu, and s390x-linux-gnu. Tested-by: Carlos O'Donell <carlos@redhat.com> Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* string: Add sigabbrev_np and sigdescr_npAdhemerval Zanella2020-07-071-0/+2
| | | | | | | | | | | | | | | | | | The sigabbrev_np returns the abbreviated signal name (e.g. "HUP" for SIGHUP) while sigdescr_np returns the string describing the error number (e.g "Hangup" for SIGHUP). Different than strsignal, sigdescr_np does not attempt to translate the return description and both functions return NULL for an invalid signal number. They should be used instead of sys_siglist or sys_sigabbrev and they are both thread and async-signal safe. They are added as GNU extensions on string.h header (same as strsignal). Checked on x86-64-linux-gnu, i686-linux-gnu, powerpc64le-linux-gnu, and s390x-linux-gnu. Tested-by: Carlos O'Donell <carlos@redhat.com> Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* Add the __libc_single_threaded variableFlorian Weimer2020-07-061-0/+1
| | | | | | | | | | | | | | The variable is placed in libc.so, and it can be true only in an outer libc, not libcs loaded via dlmopen or static dlopen. Since thread creation from inner namespaces does not work, pthread_create can update __libc_single_threaded directly. Using __libc_early_init and its initial flag, implementation of this variable is very straightforward. A future version may reset the flag during fork (but not in an inner namespace), or after joining all threads except one. Reviewed-by: DJ Delorie <dj@redhat.com>
* Linux: Perform rseq registration at C startup and thread creationMathieu Desnoyers2020-07-061-0/+1
| | | | | | | | | | | | | | | | | | | Register rseq TLS for each thread (including main), and unregister for each thread (excluding main). "rseq" stands for Restartable Sequences. See the rseq(2) man page proposed here: https://lkml.org/lkml/2018/9/19/647 Those are based on glibc master branch commit 3ee1e0ec5c. The rseq system call was merged into Linux 4.18. The TLS_STATIC_SURPLUS define is increased to leave additional room for dlopen'd initial-exec TLS, which keeps elf/tst-auditmany working. The increase (76 bytes) is larger than 32 bytes because it has not been increased in quite a while. The cost in terms of additional TLS storage is quite significant, but it will also obscure some initial-exec-related dlopen failures.
* New exp10f version without SVID compat wrapperAdhemerval Zanella2020-06-191-0/+1
| | | | | | | | | | | | | | | | | | | | | | | This patch changes the exp10f error handling semantics to only set errno according to POSIX rules. New symbol version is introduced at GLIBC_2.32. The old wrappers are kept for compat symbols. There are some outliers that need special handling: - ia64 provides an optimized implementation of exp10f that uses ia64 specific routines to set SVID compatibility. The new symbol version is aliased to the exp10f one. - m68k also provides an optimized implementation, and the new version uses it instead of the sysdeps/ieee754/flt32 one. - riscv and csky uses the generic template implementation that does not provide SVID support. For both cases a new exp10f version is not added, but rather the symbols version of the generic sysdeps/ieee754/flt32 is adjusted instead. Checked on aarch64-linux-gnu, x86_64-linux-gnu, i686-linux-gnu, powerpc64le-linux-gnu.
* nptl: Add pthread_attr_setsigmask_np, pthread_attr_getsigmask_npFlorian Weimer2020-06-021-0/+2
| | | | | Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* nptl: Move pthread_gettattr_np into libcFlorian Weimer2020-05-202-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Use __getline instead of __getdelim to avoid a localplt failure. Likewise for __getrlimit/getrlimit. The abilist updates were performed by: git ls-files 'sysdeps/unix/sysv/linux/**/libc.abilist' \ | while read x ; do echo "GLIBC_2.32 pthread_getattr_np F" >> $x done python3 scripts/move-symbol-to-libc.py --only-linux pthread_getattr_np The private export of __pthread_getaffinity_np is no longer needed, but the hidden alias still necessary so that the symbol can be exported with versioned_symbol. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* nptl: Move pthread_getaffinity_np into libcFlorian Weimer2020-05-202-2/+3
| | | | | | | | | | | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> The abilist updates were performed by: git ls-files 'sysdeps/unix/sysv/linux/**/libc.abilist' \ | while read x ; do echo "GLIBC_2.32 pthread_getaffinity_np F" >> $x done python3 scripts/move-symbol-to-libc.py pthread_getaffinity_np Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* nptl: Move pthread_attr_setaffinity_np into libcFlorian Weimer2020-05-202-2/+3
| | | | | | | | | | | | | | | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> The symbol did not previously exist in libc, so a new GLIBC_2.32 symbol is needed, to get correct dependency for binaries which use the symbol but no longer link against libpthread. The abilist updates were performed by: git ls-files 'sysdeps/unix/sysv/linux/**/libc.abilist' \ | while read x ; do echo "GLIBC_2.32 pthread_attr_setaffinity_np F" >> $x done python3 scripts/move-symbol-to-libc.py pthread_attr_setaffinity_np Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* nptl: Move pthread_sigmask implementation to libcAdhemerval Zanella2020-04-212-1/+2
| | | | | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> A new symbol version is added on libc to force loading failure instead of lazy binding one for newly binaries with old loaders. Checked with a build against all affected ABIs.
* i686: Add INTERNAL_SYSCALL_NCS 6 argument supportAdhemerval Zanella2020-04-171-30/+49
| | | | | | | | It is required for i686 BZ#12683 support when building with -Os or -fno-omit-frame-pointer on some gcc versions. It is not used on current code. Check on i686-linux-gnu.
* i386: Remove build support for GCC older than GCC 6H.J. Lu2020-04-071-16/+1
| | | | | | | | | Since GCC 6.2 or later is required to build glibc, remove build support for GCC older than GCC 6. Testd with GCC 6.4 and GCC 9.3. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* i386: Disable check_consistency for GCC 5 and above [BZ #25788]H.J. Lu2020-04-061-2/+3
| | | | | | | check_consistency should be disabled for GCC 5 and above since there is no fixed PIC register in GCC 5 and above. Check __GNUC_PREREQ (5,0) instead OPTIMIZE_FOR_GCC_5 since OPTIMIZE_FOR_GCC_5 is false with -fno-omit-frame-pointer.
* Update syscall lists for Linux 5.6.Joseph Myers2020-04-031-0/+2
| | | | | | | Linux 5.6 has new openat2 and pidfd_getfd syscalls. This patch adds them to syscall-names.list and regenerates the arch-syscall.h files. Tested with build-many-glibcs.py.
* nptl: Move pthread_setschedparam implementation into libcFlorian Weimer2020-02-201-1/+0
| | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_getschedparam implementation into libcFlorian Weimer2020-02-201-1/+0
| | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_cond_init implementation into libcFlorian Weimer2020-02-201-2/+0
| | | | | | | | | | | It is necessary to export __pthread_cond_init from libc because the C11 condition variable needs it and is still left in libpthread. This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_cond_destroy implementation into libcFlorian Weimer2020-02-201-2/+0
| | | | | | | | | | | It is necessary to export __pthread_cond_destroy from libc because the C11 condition variable needs it and is still left in libpthread. This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_condattr_init implementation into libcFlorian Weimer2020-02-201-1/+0
| | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_condattr_destroy implementation into libcFlorian Weimer2020-02-201-1/+0
| | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_attr_setscope implementation into libcFlorian Weimer2020-02-201-1/+0
| | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_attr_getscope implementation into libcFlorian Weimer2020-02-201-1/+0
| | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_attr_setschedpolicy implementation into libcFlorian Weimer2020-02-201-1/+0
| | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_attr_getschedpolicy implementation into libcFlorian Weimer2020-02-201-1/+0
| | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* ld.so: Do not export free/calloc/malloc/realloc functions [BZ #25486]Florian Weimer2020-02-152-10/+0
| | | | | | | | | | | | | | | | | | | Exporting functions and relying on symbol interposition from libc.so makes the choice of implementation dependent on DT_NEEDED order, which is not what some compiler drivers expect. This commit replaces one magic mechanism (symbol interposition) with another one (preprocessor-/compiler-based redirection). This makes the hand-over from the minimal malloc to the full malloc more explicit. Removing the ABI symbols is backwards-compatible because libc.so is always in scope, and the dynamic loader will find the malloc-related symbols there since commit f0b2132b35248c1f4a80f62a2c38cddcc802aa8c ("ld.so: Support moving versioned symbols between sonames [BZ #24741]"). Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* linux: Remove INTERNAL_SYSCALL_DECLAdhemerval Zanella2020-02-146-51/+42
| | | | | | | | | | | With all Linux ABIs using the expected Linux kABI to indicate syscalls errors, the INTERNAL_SYSCALL_DECL is an empty declaration on all ports. This patch removes the 'err' argument on INTERNAL_SYSCALL* macro and remove the INTERNAL_SYSCALL_DECL usage. Checked with a build against all affected ABIs.
* linux: Consolidate INLINE_SYSCALLAdhemerval Zanella2020-02-141-39/+1
| | | | | | | | | | | With all Linux ABIs using the expected Linux kABI to indicate syscalls errors, there is no need to replicate the INLINE_SYSCALL. The generic Linux sysdep.h includes errno.h even for !__ASSEMBLER__, which is ok now and it allows cleanup some archaic code that assume otherwise. Checked with a build against all affected ABIs.
* i386: Enable CET support in ucontext functionsH.J. Lu2020-02-146-3/+425
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1. getcontext and swapcontext are updated to save the caller's shadow stack pointer and return address. 2. setcontext and swapcontext are updated to restore shadow stack and jump to new context directly. 3. makecontext is updated to allocate a new shadow stack and set the caller's return address to the helper code, L(exitcode). 4. Since we no longer save and restore EAX, ECX and EDX in getcontext, setcontext and swapcontext, we can use them as scratch register slots to enable CET in ucontext functions. Since makecontext allocates a new shadow stack when making a new context and kernel allocates a new shadow stack for clone/fork/vfork syscalls, we track the current shadow stack base. In setcontext and swapcontext, if the target shadow stack base is the same as the current shadow stack base, we unwind the shadow stack. Otherwise it is a stack switch and we look for a restore token. We enable shadow stack at run-time only if program and all used shared objects, including dlopened ones, are shadow stack enabled, which means that they must be compiled with GCC 8 or above and glibc 2.28 or above. We need to save and restore shadow stack only if shadow stack is enabled. When caller of getcontext, setcontext, swapcontext and makecontext is compiled with smaller ucontext_t, shadow stack won't be enabled at run-time. We check if shadow stack is enabled before accessing the extended field in ucontext_t. Tested on i386 CET/non-CET machines. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* i386: Remove _exit.SH.J. Lu2020-02-011-44/+0
| | | | | | | The generic implementation is suffice since __NR_exit_group is always support and i386 does define ABORT_INSTRUCTION. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* i386: Don't unnecessarily save and restore EAX, ECX and EDX [BZ# 25262]H.J. Lu2020-02-014-29/+10
| | | | | | | | | | | On i386, since EAX, ECX and EDX are caller-saved, there are no need to save and restore EAX, ECX and EDX in getcontext, setcontext and swapcontext. They just need to clear EAX on success. The extra scratch registers are needed to enable CET. Tested on i386. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* linux: Enable vDSO clock_gettime64 for i386Adhemerval Zanella2020-01-031-0/+1
| | | | | | | | It was added on Linux 5.3 (commit 22ca962288c0a). Checked on i686-linux-gnu with 5.3.0 kernel. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* linux: Update x86 vDSO symbolsAdhemerval Zanella2020-01-031-0/+2
| | | | | | | | | | | | | Add the missing time and clock_getres vDSO symbol names on x86. For time, the iFUNC already uses expected name so it affects only the static build. The clock_getres is a new implementation added on Linux 5.3 (f66501dc53e72). Checked on x86-linux-gnu and i686-linux-gnu. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* Linux: Add tables with system call numbersFlorian Weimer2020-01-021-0/+426
| | | | | | | | | | | | | | | | | | | | | | | | | | | The new tables are currently only used for consistency checks with the installed kernel headers and the architecture-independent system call names table. They are based on Linux 5.4. The goal is to use these architecture-specific tables to ensure that system call wrappers are available irrespective of the version of the installed kernel headers. The tables are formatted in the form of C header files so that they can be used directly in an #include directive, without external preprocessing. (External preprocessing of a plain table file would introduce cross-subdirectory dependency issues.) However, the intent is that they can still be treated as tables and can be processed by simple tools. The irregular system call names on 32-bit arm add a complication. The <fixup-asm-unistd.h> header is introduced to work around that, and the system calls are listed under regular names in the <arch-syscall.h> file. A make target, update-syscalls-list, is added to patch the glibc sources with data from the current kernel headers. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* Update copyright dates with scripts/update-copyrights.Joseph Myers2020-01-0130-30/+30
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* nptl: Move waitpid implementation to libcAdhemerval Zanella2019-12-191-1/+0
| | | | Checked on x86_64-linux-gnu and powerpc64le-linux-gnu.
* nptl: Move wait implementation to libcAdhemerval Zanella2019-12-191-2/+0
| | | | Checked on x86_64-linux-gnu and powerpc64le-linux-gnu.
* nptl: Add more missing placeholder abi symbol from nanosleep moveAdhemerval Zanella2019-12-091-0/+1
| | | | | | | | | | | | | | | | | | | | This patch adds the missing __libpthread_version_placeholder for GLIBC_2.2.6 version from the nanosleep implementation move from libpthread to libc (79a547b162). It also fixes the wrong compat symbol definitions added by changing back the version used on vfork check and remove the __libpthread_version_placeholder added on some ABI (4f4bb489e0dd). The __libpthread_version_placeholder is also refactored to make it simpler to add new compat_symbols by adding a new macro compat_symbol_unique which uses the compiler extension __COUNTER__ to generate unique strong alias to be used with compat_symbol. Checked with a updated-abi on the all affected abis of the nanosleep move. Change-Id: I347a4dbdc931bb42b359456932dd1e17aa4d4078
* nptl: Move nanosleep implementation to libcAdhemerval Zanella2019-11-061-2/+0
| | | | | | | | | Checked on x86_64-linux-gnu and powerpc64le-linux-gnu. I also checked the libpthread.so .gnu.version_d entries for every ABI affected and all of them contains the required versions (including for architectures which exports __nanosleep with a different version). Reviewed-by: Florian Weimer <fweimer@redhat.com>
* nptl: Add pthread_clockjoin_npMike Crowe2019-11-011-0/+1
| | | | | | | | | | | Introduce pthread_clockjoin_np as a version of pthread_timedjoin_np that accepts a clockid_t parameter to indicate which clock the timeout should be measured against. This mirrors the recently-added POSIX-proposed "clock" wait functions. Checked on x86_64-linux-gnu. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Use clock_gettime to implement gettimeofday.Adhemerval Zanella2019-10-301-35/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Consolidate generic gettimeofday implementation to use clock_gettime. Linux ports that still provide gettimeofday through vDSO are not changed. Remove sysdeps/unix/clock_gettime.c, which implemented clock_gettime using gettimeofday; new OS ports must provide a real implementation of clock_gettime. Rename sysdeps/mach/gettimeofday.c to sysdeps/mach/clock_gettime.c and convert into an implementation of clock_gettime. It only supports CLOCK_REALTIME; Mach does not appear to have any support for monotonic clocks. It uses __host_get_time, which provides at best microsecond resolution. Hurd is currently using sysdeps/posix/clock_getres.c for clock_getres; its output for CLOCK_REALTIME is based on sysconf (_SC_CLK_TCK), and I do not know whether that gives the correct result. Unlike settimeofday, there are no known uses of gettimeofday's vestigial "get time zone" feature that are not bugs. (The per-process timezone support in localtime and friends is unrelated, and the programs that set the kernel's offset between the hardware clock and UTC do not need to read it back.) Therefore, this feature is dummied out. Henceforth, if gettimeofday's "struct timezone" argument is not NULL, it will write zeroes to both fields. Any program that is actually looking at this data will thus think it is running in UTC, which is probably more correct than whatever it was doing before. [__]gettimeofday no longer has any internal callers, so we can now remove its internal prototype and PLT bypass aliases. The __gettimeofday@GLIBC_2.0 export remains, in case it is used by any third-party code. It also allows to simplify the arch-specific implementation on x86 and powerpc to remove the hack to disable the internal route to non iFUNC variant for internal symbol. This patch also fixes a missing optimization on aarch64, powerpc, and x86 where the code used on static build do not use the vDSO. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc64le-linux-gnu, powerpc64-linux-gnu, powerpc-linux-gnu, and aarch64-linux-gnu. Co-authored-by: Zack Weinberg <zackw@panix.com> Reviewed-by: Lukasz Majewski <lukma@denx.de>
* Change most internal uses of time to __clock_gettime.Adhemerval Zanella2019-10-301-34/+0
| | | | | | | | | | | | | | | | | As for gettimeofday, time will be implemented based on clock_gettime on all platforms and internal code should use clock_gettime directly. In addition to removing a layer of indirection, this will allow us to remove the PLT-bypass gunk for gettimeofday. The changed code always assumes __clock_gettime (CLOCK_REALTIME) or __clock_gettime (CLOCK_REALTIME_COARSE) (for Linux case) cannot fail, using the same rationale for gettimeofday change. And internal helper was added (time_now). Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc64le-linux-gnu, powerpc64-linux-gnu, and powerpc-linux-gnu. Reviewed-by: Lukasz Majewski <lukma@denx.de>
* Update sysvipc kernel-features.h files for Linux 5.1Adhemerval Zanella2019-10-181-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | Linux 5.1 adds missing SySV IPC syscalls to the syscall table for remanining one that still uses the ipc syscall on glibc (m68k, mips-o32, powerpc, s390, sh, and sparc32). However the newly added direct ipc syscall are different than the old ones: 1. They do not expect IPC_64, meaning __IPC_64 should be set to zero when new syscalls are used. And new syscalls can not be used for compat functions like __old_semctl (to emulated old sysvipc it requires to use the old __NR_ipc syscall without __IPC_64). Thus IPC_64 is redefined for newer kernels on affected ABIs. 2. semtimedop and semop does not exist on 32-bit ABIs (only semtimedop_time64 is supplied). The provided syscall wrappers only uses the wire-up syscall if __NR_semtimedop and __NR_semop are also defined. Checked on x86_64-linux-gnu and i686-linux-gnu on both a 4.15 kernel configure with default options and sysvipc tests on a 5.3.0 kernel with --enable-kernel=5.1. Tested-by: Paul A. Clarke <pc@us.ibm.com>
* ipc: Refactor sysvipc internal definitionsAdhemerval Zanella2019-10-171-0/+1
| | | | | | | | | | | | | | | | | | | | | | | This patch refactor the internal sysvipc in two main points: 1. Add a new __ASSUME_SYSVIPC_DEFAULT_IPC_64 to infer the __IPC_64 value to be used along either the multiplexed __NR_ipc or wired-up syscall. The defaut value assumed for __IPC_64 is also changed from 0x100 to 0x0, aligning with Linux generic UAPI. The idea is to simplify the Linux 5.1 wire-up for sysvipc syscalls for some 32-bit ABIs (which expectes __IPC_64 being 0x0) and simplify new ports (which will no longer need to add ipc_priv.h). 2. It also removes some duplicated internal definition used on compat sysvipc symbols defined at ipc_priv.h (more specifically the __old_ipc_perm, SEMCTL_ARG_ADDRESS, MSGRCV_ARGS, and SEMTIMEDOP_IPC_ARGS). The idea is also to make it simpler to enable the new wire-up sysvipc syscall provided by Linux v5.1. There is no semantic change expected on any port. Checked with a build against all affected ABIs. Reviewed-by: Florian Weimer <fweimer@redhat.com>
* nptl: Move pthread_attr_setschedparam implementation into libcFlorian Weimer2019-10-071-1/+0
| | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_attr_getschedparam implementation into libcFlorian Weimer2019-10-071-1/+0
| | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_attr_setinheritsched implementation into libc.Florian Weimer2019-10-041-1/+0
| | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html>
* Refactor vDSO initialization codeAdhemerval Zanella2019-09-172-48/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Linux vDSO initialization code the internal function pointers require a lot of duplicated boilerplate over different architectures. This patch aims to simplify not only the code but the required definition to enable a vDSO symbol. The changes are: 1. Consolidate all init-first.c on only one implementation and enable the symbol based on HAVE_*_VSYSCALL existence. 2. Set the HAVE_*_VSYSCALL to the architecture expected names string. 3. Add a new internal implementation, get_vdso_mangle_symbol, which returns a mangled function pointer. Currently the clock_gettime, clock_getres, gettimeofday, getcpu, and time are handled in an arch-independent way, powerpc still uses some arch-specific vDSO symbol handled in a specific init-first implementation. Checked on aarch64-linux-gnu, arm-linux-gnueabihf, i386-linux-gnu, mips64-linux-gnu, powerpc64le-linux-gnu, s390x-linux-gnu, sparc64-linux-gnu, and x86_64-linux-gnu. * sysdeps/powerpc/powerpc32/backtrace.c (is_sigtramp_address, is_sigtramp_address_rt): Use HAVE_SIGTRAMP_{RT}32 instead of SHARED. * sysdeps/powerpc/powerpc64/backtrace.c (is_sigtramp_address): Likewise. * sysdeps/unix/sysv/linux/aarch64/init-first.c: Remove file. * sysdeps/unix/sysv/linux/aarch64/libc-vdso.h: Likewise. * sysdeps/unix/sysv/linux/arm/init-first.c: Likewise. * sysdeps/unix/sysv/linux/arm/libc-vdso.h: Likewise. * sysdeps/unix/sysv/linux/mips/init-first.c: Likewise. * sysdeps/unix/sysv/linux/mips/libc-vdso.h: Likewise. * sysdeps/unix/sysv/linux/i386/init-first.c: Likewise. * sysdeps/unix/sysv/linux/riscv/init-first.c: Likewise. * sysdeps/unix/sysv/linux/riscv/libc-vdso.h: Likewise. * sysdeps/unix/sysv/linux/s390/init-first.c: Likewise. * sysdeps/unix/sysv/linux/s390/libc-vdso.h: Likewise. * sysdeps/unix/sysv/linux/sparc/init-first.c: Likewise. * sysdeps/unix/sysv/linux/sparc/libc-vdso.h: Likewise. * sysdeps/unix/sysv/linux/x86/libc-vdso.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/init-first.c: Likewise. * sysdeps/unix/sysv/linux/aarch64/sysdep.h (HAVE_CLOCK_GETRES_VSYSCALL, HAVE_CLOCK_GETTIME_VSYSCALL, HAVE_GETTIMEOFDAY_VSYSCALL): Define value based on kernel exported name. * sysdeps/unix/sysv/linux/arm/sysdep.h (HAVE_CLOCK_GETTIME_VSYSCALL, HAVE_GETTIMEOFDAY_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/i386/sysdep.h (HAVE_CLOCK_GETTIME_VSYSCALL, HAVE_GETTIMEOFDAY_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/mips/sysdep.h (HAVE_CLOCK_GETTIME_VSYSCALL, HAVE_GETTIMEOFDAY_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/powerpc/sysdep.h (HAVE_CLOCK_GETRES_VSYSCALL, HAVE_CLOCK_GETTIME_VSYSCALL, HAVE_GETCPU_VSYSCALL, HAVE_TIME_VSYSCALL, HAVE_GET_TBFREQ, HAVE_SIGTRAMP_RT64, HAVE_SIGTRAMP_32, HAVE_SIGTRAMP_RT32i, HAVE_GETTIMEOFDAY_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/riscv/sysdep.h (HAVE_CLOCK_GETRES_VSYSCALL, HAVE_CLOCK_GETTIME_VSYSCALL, HAVE_GETTIMEOFDAY_VSYSCALL, HAVE_GETCPU_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/s390/sysdep.h (HAVE_CLOCK_GETRES_VSYSCALL, HAVE_CLOCK_GETTIME_VSYSCALL, HAVE_GETTIMEOFDAY_VSYSCALL, HAVE_GETCPU_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/sparc/sysdep.h (HAVE_CLOCK_GETTIME_VSYSCALL, HAVE_GETTIMEOFDAY_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/x86_64/sysdep.h (HAVE_CLOCK_GETTIME_VSYSCALL, HAVE_GETTIMEOFDAY_VSYSCALL, HAVE_GETCPU_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/dl-vdso.h (VDSO_NAME, VDSO_HASH): Define to invalid names if architecture does not define them. (get_vdso_mangle_symbol): New symbol. * sysdeps/unix/sysv/linux/init-first.c: New file. * sysdeps/unix/sysv/linux/libc-vdso.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/init-first.c (gettimeofday, clock_gettime, clock_getres, getcpu, time): Remove declaration. (__libc_vdso_platform_setup_arch): Likewise and use get_vdso_mangle_symbol to setup vDSO symbols. (sigtramp_rt64, sigtramp32, sigtramp_rt32, get_tbfreq): Add attribute_hidden. * sysdeps/unix/sysv/linux/powerpc/libc-vdso.h: Likewise. * sysdeps/unix/sysv/linux/sysdep-vdso.h (VDSO_SYMBOL): Remove definition.
* Remove PREPARE_VERSION and PREPARE_VERSION_KNOWAdhemerval Zanella2019-09-172-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the PREPARE_VERSION and PREPARE_VERSION_KNOW macro and uses a static inline function instead, get_vdso_symbol. Each architecture that supports vDSO must define the Linux version and its hash for symbol resolution (VDSO_NAME and VDSO_HASH macro respectively). It also organizes the HAVE_*_VSYSCALL for mips, powerpc, and s390 to define them on a common header. The idea is to require less code to configure and enable vDSO support for newer ports. No semantic changes are expected. Checked with a build against all affected architectures. * sysdeps/unix/make-syscalls.sh: Make vDSO call use get_vdso_symbol. * sysdeps/unix/sysv/linux/aarch64/gettimeofday.c (__gettimeofday): Use get_vdso_symbol instead of _dl_vdso_vsym. * sysdeps/unix/sysv/linux/powerpc/time.c (time): Likewise. * sysdeps/unix/sysv/linux/riscv/flush-icache.c (__lookup_riscv_flush_icache): Likewise. * sysdeps/unix/sysv/linux/x86/gettimeofday.c (__gettimeofday): Likewise. * sysdeps/unix/sysv/linux/x86/time.c (time): Likewise. * sysdeps/unix/sysv/linux/powerpc/gettimeofday.c: Likewise. * sysdeps/unix/sysv/linux/aarch64/init-first.c: Likewise. * sysdeps/unix/sysv/linux/arm/init-first.c: Likewise. * sysdeps/unix/sysv/linux/i386/init-first.c: Likewise. * sysdeps/unix/sysv/linux/mips/init-first.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/init-first.c: Likewise. * sysdeps/unix/sysv/linux/riscv/init-first.c: Likewise. * sysdeps/unix/sysv/linux/sparc/init-first.c: Likewise. * sysdeps/unix/sysv/linux/s390/init-first.c: Likewise. * sysdeps/unix/sysv/linux/x86_64/init-first.c: Likewise. * sysdeps/unix/sysv/linux/aarch64/sysdep.h (VDSO_NAME, VDSO_HASH): Define. * sysdeps/unix/sysv/linux/arm/sysdep.h (VDSO_NAME, VDSO_HASH): Likewise. * sysdeps/unix/sysv/linux/i386/sysdep.h (VDSO_NAME, VDSO_HASH): Likewise. * sysdeps/unix/sysv/linux/riscv/sysdep.h (VDSO_NAME, VDSO_HASH): Likewise. * sysdeps/unix/sysv/linux/sparc/sysdep.h (VDSO_NAME, VDSO_HASH): Likewise. * sysdeps/unix/sysv/linux/x86_64/sysdep.h (VDSO_NAME, VDSO_HASH): Likewise. * sysdeps/unix/sysv/linux/mips/mips32/sysdep.h (HAVE_CLOCK_GETTIME_VSYSCALL, HAVE_GETTIMEOFDAY_VSYSCALL): Remove definition. * sysdeps/unix/sysv/linux/mips/mips64/n32/sysdep.h (HAVE_CLOCK_GETTIME_VSYSCALL, HAVE_GETTIMEOFDAY_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h (HAVE_CLOCK_GETTIME_VSYSCALL, HAVE_GETTIMEOFDAY_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h (HAVE_CLOCK_GETTIME_VSYSCALL, HAVE_GETTIMEOFDAY_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h (HAVE_CLOCK_GETTIME_VSYSCALL, HAVE_GETTIMEOFDAY_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h (HAVE_CLOCK_GETRES_VSYSCALL, HAVE_CLOCK_GETTIME_VSYSCALL, HAVE_GETTIMEOFDAY_VSYSCALL, HAVE_GETCPU_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h (HAVE_CLOCK_GETRES_VSYSCALL, HAVE_CLOCK_GETTIME_VSYSCALL, HAVE_GETTIMEOFDAY_VSYSCALL, HAVE_GETCPU_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/mips/sysdep.h: New file. * sysdeps/unix/sysv/linux/powerpc/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/s390/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/dl-vdso.h (PREPARE_VERSION, PREPARE_VERSION_KNOWN, VDSO_NAME_LINUX_2_6, VDSO_HASH_LINUX_2_6, VDSO_NAME_LINUX_2_6_15, VDSO_HASH_LINUX_2_6_15, VDSO_NAME_LINUX_2_6_29, VDSO_HASH_LINUX_2_6_29, VDSO_NAME_LINUX_4_15, VDSO_HASH_LINUX_4_15): Remove defines. (get_vdso_symbol): New function.
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-07-15 06:22:01 +0000