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* Add getcpuH.J. Lu2018-12-0731-1/+83
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add #include <sched.h> int getcpu (unsigned int *cpu, unsigned int *node); to return currently used CPU and NUMA node. Tested on x86-64, x32 and i686 as well as with build-many-glibcs.py. * NEWS: Mention getcpu. * include/sched.h (__getcpu): New libc_hidden_proto. * manual/resource.texi: Document getcpu. * sysdeps/unix/sysv/linux/Makefile (sysdep_routines): Add getcpu. * sysdeps/unix/sysv/linux/Versions (GLIBC_2.29): Add getcpu. * sysdeps/unix/sysv/linux/aarch64/libc.abilist: Add getcpu. * sysdeps/unix/sysv/linux/alpha/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/bits/sched.h (getcpu): New prototype. * sysdeps/unix/sysv/linux/getcpu.c: New file. * sysdeps/unix/sysv/linux/tst-skeleton-affinity.c (test_size): Also check getcpu.
* hurd: Implement support for posix_spawn_file_actions_addfchdir_npSamuel Thibault2018-12-071-0/+44
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* posix: New function posix_spawn_file_actions_addfchdir_np [BZ #17405]Florian Weimer2018-12-0729-0/+37
| | | | | | Along with posix_spawn_file_actions_addchdir, posix_spawn_file_actions_addfchdir is the subject of a change proposal for POSIX: <http://austingroupbugs.net/view.php?id=1208>
* Use PRINTF_LDBL_IS_DBL instead of __ldbl_is_dbl.Zack Weinberg2018-12-054-276/+238
| | | | | | | | | After all that prep work, nldbl-compat.c can now use PRINTF_LDBL_IS_DBL instead of __no_long_double to control the behavior of printf-like functions; this is the last thing we needed __no_long_double for, so it can go away entirely. Tested for powerpc and powerpc64le.
* Use PRINTF_FORTIFY instead of _IO_FLAGS2_FORTIFY (bug 11319)Zack Weinberg2018-12-053-23/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The _chk variants of all of the printf functions become much simpler. This is the last thing that we needed _IO_acquire_lock_clear_flags2 for, so it can go as well. I took the opportunity to make the headers included and the names of all local variables consistent across all the affected files. Since we ultimately want to get rid of __no_long_double as well, it must be possible to get all of the nontrivial effects of the _chk functions by calling the _internal functions with appropriate flags. For most of the __(v)xprintf_chk functions, this is covered by PRINTF_FORTIFY plus some up-front argument checks that can be duplicated. However, __(v)sprintf_chk installs a custom jump table so that it can crash instead of overflowing the output buffer. This functionality is moved to __vsprintf_internal, which now has a 'maxlen' argument like __vsnprintf_internal; to get the unsafe behavior of ordinary (v)sprintf, pass -1 for that argument. obstack_printf_chk and obstack_vprintf_chk are no longer in the same file. As a side-effect of the unification of both fortified and non-fortified vdprintf initialization, this patch fixes bug 11319 for __dprintf_chk and __vdprintf_chk, which was previously fixed only for dprintf and vdprintf by the commit commit 7ca890b88e6ab7624afb1742a9fffb37ad5b3fc3 Author: Ulrich Drepper <drepper@redhat.com> Date: Wed Feb 24 16:07:57 2010 -0800 Fix reporting of I/O errors in *dprintf functions. This patch adds a test case to avoid regressions. Tested for powerpc and powerpc64le.
* Add __vsyslog_internal, with same flags as __v*printf_internal.Zack Weinberg2018-12-051-1/+1
| | | | | | | | | | __nldbl___vsyslog_chk will ultimately want to pass PRINTF_LDBL_IS_DBL down to __vfprintf_internal *as well as* possibly setting PRINTF_FORTIFY. To make that possible, we need a __vsyslog_internal that takes the same flags as printf. The code in misc/syslog.c does also get a little simpler. Tested for powerpc and powerpc64le.
* Add __v*printf_internal with flags argumentsZack Weinberg2018-12-051-10/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are a lot more printf variants than there are scanf variants, and the code for setting up and tearing down their custom FILE variants around the call to __vf(w)printf is more complicated and variable. Therefore, I have added _internal versions of all the v*printf variants, rather than introducing helper routines so that they can all directly call __vf(w)printf_internal, as was done with scanf. As with the scanf changes, in this patch the _internal functions still look at the environmental mode bits and all callers pass 0 for the flags parameter. Several of the affected public functions had _IO_ name aliases that were not exported (but, in one case, appeared in libio.h anyway); I was originally planning to leave them as aliases to avoid having to touch internal callers, but it turns out ldbl_*_alias only work for exported symbols, so they've all been removed instead. It also turns out there were hardly any internal callers. _IO_vsprintf and _IO_vfprintf *are* exported, so those two stick around. Summary for the changes to each of the affected symbols: _IO_vfprintf, _IO_vsprintf: All internal calls removed, thus the internal declarations, as well as uses of libc_hidden_proto and libc_hidden_def, were also removed. The external symbol is now exposed via uses of ldbl_strong_alias to __vfprintf_internal and __vsprintf_internal, respectively. _IO_vasprintf, _IO_vdprintf, _IO_vsnprintf, _IO_vfwprintf, _IO_vswprintf, _IO_obstack_vprintf, _IO_obstack_printf: All internal calls removed, thus declaration in internal headers were also removed. They were never exported, so there are no aliases tying them to the internal functions. I.e.: entirely gone. __vsnprintf: Internal calls were always preceded by macros such as #define __vsnprintf _IO_vsnprintf, and #define __vsnprintf vsnprintf The macros were removed and their uses replaced with calls to the new internal function __vsnprintf_internal. Since there were no internal calls, the internal declaration was also removed. The external symbol is preserved with ldbl_weak_alias to ___vsnprintf. __vfwprintf: All internal calls converted into calls to __vfwprintf_internal, thus the internal declaration was removed. The function is now a wrapper that calls __vfwprintf_internal. The external symbol is preserved. __vswprintf: Similarly, but no external symbol. __vasprintf, __vdprintf, __vfprintf, __vsprintf: New internal wrappers. Not exported. vasprintf, vdprintf, vfprintf, vsprintf, vsnprintf, vfwprintf, vswprintf, obstack_vprintf, obstack_printf: These functions used to be aliases to the respective _IO_* function, they are now aliases to their respective __* functions. Tested for powerpc and powerpc64le.
* Use SCANF_LDBL_IS_DBL instead of __ldbl_is_dbl.Zack Weinberg2018-12-051-130/+121
| | | | | | | | | | Change the callers of __vfscanf_internal and __vfwscanf_internal that want to treat 'long double' as another name for 'double' (all of which happen to be in sysdeps/ieee754/ldbl-opt/nldbl-compat.c) to communicate this via the new flags argument, instead of the per-thread variable __no_long_double and its __ldbl_is_dbl wrapper macro. Tested for powerpc and powerpc64le.
* Add __vfscanf_internal and __vfwscanf_internal with flags arguments.Zack Weinberg2018-12-053-4/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are two flags currently defined: SCANF_LDBL_IS_DBL is the mode used by __nldbl_ scanf variants, and SCANF_ISOC99_A is the mode used by __isoc99_ scanf variants. In this patch, the new functions honor these flag bits if they're set, but they still also look at the corresponding bits of environmental state, and callers all pass zero. The new functions do *not* have the "errp" argument possessed by _IO_vfscanf and _IO_vfwscanf. All internal callers passed NULL for that argument. External callers could theoretically exist, so I preserved wrappers, but they are flagged as compat symbols and they don't preserve the three-way distinction among types of errors that was formerly exposed. These functions probably should have been in the list of deprecated _IO_ symbols in 2.27 NEWS -- they're not just aliases for vfscanf and vfwscanf. (It was necessary to introduce ldbl_compat_symbol for _IO_vfscanf. Please check that part of the patch very carefully, I am still not confident I understand all of the details of ldbl-opt.) This patch also introduces helper inlines in libio/strfile.h that encapsulate the process of initializing an _IO_strfile object for reading. This allows us to call __vfscanf_internal directly from sscanf, and __vfwscanf_internal directly from swscanf, without duplicating the initialization code. (Previously, they called their v-counterparts, but that won't work if we want to control *both* C99 mode and ldbl-is-dbl mode using the flags argument to__vfscanf_internal.) It's still a little awkward, especially for wide strfiles, but it's much better than what we had. Tested for powerpc and powerpc64le.
* Enable VDSO for static linking on armRafael Ávila de Espíndola2018-12-033-10/+8
| | | | | | | | | | | | I have tested that this builds and the resulting program still work. The kernel in gcc117 (which I ussed for testing) seems to be missing https://patchwork.kernel.org/patch/10060431/, so the vdso is never used. [BZ #19767] * sysdeps/unix/sysv/linux/arm/init-first.c: Remove #ifdef SHARED. * sysdeps/unix/sysv/linux/arm/libc-vdso.h: Remove #ifdef SHARED. * sysdeps/unix/sysv/linux/arm/sysdep.h: Define ALWAYS_USE_VSYSCALL.
* posix: Fix segfault in maybe_script_executeAdhemerval Zanella2018-12-031-1/+1
| | | | | | | | | | | | This patch is essentially 28669f86f6 adjusted for the generic implementation. Checked on x86_64-linux-gnu with Linux spawni.c removed. The only failure is posix/tst-spawn3, which is expected. [BZ #23913] * sysdeps/posix/spawni.c (maybe_script_execute): Increment size of new_argv by one.
* x86: Extend CPUID support in struct cpu_featuresH.J. Lu2018-12-036-245/+1249
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Extend CPUID support for all feature bits from CPUID. Add a new macro, CPU_FEATURE_USABLE, which can be used to check if a feature is usable at run-time, instead of HAS_CPU_FEATURE and HAS_ARCH_FEATURE. Add COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007 and COMMON_CPUID_INDEX_80000008 to check CPU feature bits in them. Tested on i686 and x86-64 as well as using build-many-glibcs.py with x86 targets. * sysdeps/x86/cacheinfo.c (intel_check_word): Updated for cpu_features_basic. (__cache_sysconf): Likewise. (init_cacheinfo): Likewise. * sysdeps/x86/cpu-features.c (get_extended_indeces): Also populate COMMON_CPUID_INDEX_80000007 and COMMON_CPUID_INDEX_80000008. (get_common_indices): Also populate COMMON_CPUID_INDEX_D_ECX_1. Use CPU_FEATURES_CPU_P (cpu_features, XSAVEC) to check if XSAVEC is available. Set the bit_arch_XXX_Usable bits. (init_cpu_features): Use _Static_assert on index_arch_Fast_Unaligned_Load. __get_cpuid_registers and __get_arch_feature. Updated for cpu_features_basic. Set stepping in cpu_features. * sysdeps/x86/cpu-features.h: (FEATURE_INDEX_1): Changed to enum. (FEATURE_INDEX_2): New. (FEATURE_INDEX_MAX): Changed to enum. (COMMON_CPUID_INDEX_D_ECX_1): New. (COMMON_CPUID_INDEX_80000007): Likewise. (COMMON_CPUID_INDEX_80000008): Likewise. (cpuid_registers): Likewise. (cpu_features_basic): Likewise. (CPU_FEATURE_USABLE): Likewise. (bit_arch_XXX_Usable): Likewise. (cpu_features): Use cpuid_registers and cpu_features_basic. (bit_arch_XXX): Reweritten. (bit_cpu_XXX): Likewise. (index_cpu_XXX): Likewise. (reg_XXX): Likewise. * sysdeps/x86/tst-get-cpu-features.c: Include <stdio.h> and <support/check.h>. (CHECK_CPU_FEATURE): New. (CHECK_CPU_FEATURE_USABLE): Likewise. (cpu_kinds): Likewise. (do_test): Print vendor, family, model and stepping. Check HAS_CPU_FEATURE and CPU_FEATURE_USABLE. (TEST_FUNCTION): Removed. Include <support/test-driver.c> instead of "../../test-skeleton.c". * sysdeps/x86_64/multiarch/sched_cpucount.c (__sched_cpucount): Check POPCNT instead of POPCOUNT. * sysdeps/x86_64/multiarch/test-multiarch.c (do_test): Likewise.
* htl: Fix comparing attr with default valuesSamuel Thibault2018-12-014-4/+4
| | | | | | | | | | | | | | | | Fortunately we were previously only missing an optimization. Thanks dcb <dcb314@hotmail.com> for the report [BZ #23032] * sysdeps/htl/pt-barrier-init.c (pthread_barrier_init): Fix comparing attr with __pthread_default_barrierattr. * sysdeps/htl/pt-cond-init.c (__pthread_cond_init): Fix comparing attr with __pthread_default_condattr. * sysdeps/htl/pt-mutex-init.c (_pthread_mutex_init): Fix comparing attr with __pthread_default_mutexattr. * sysdeps/htl/pt-rwlock-init.c (_pthread_rwlock_init): Fix comparing attr with __pthread_default_rwlockattr.
* Mutex: Add pthread mutex tunablesKemi Wang2018-12-012-0/+49
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch does not have any functionality change, we only provide a spin count tunes for pthread adaptive spin mutex. The tunable glibc.pthread.mutex_spin_count tunes can be used by system administrator to squeeze system performance according to different hardware capabilities and workload characteristics. The maximum value of spin count is limited to 32767 to avoid the overflow of mutex->__data.__spins variable with the possible type of short in pthread_mutex_lock (). The default value of spin count is set to 100 with the reference to the previous number of times of spinning via trylock. This value would be architecture-specific and can be tuned with kinds of benchmarks to fit most cases in future. I would extend my appreciation sincerely to H.J.Lu for his help to refine this patch series. * manual/tunables.texi (POSIX Thread Tunables): New node. * nptl/Makefile (libpthread-routines): Add pthread_mutex_conf. * nptl/nptl-init.c: Include pthread_mutex_conf.h (__pthread_initialize_minimal_internal) [HAVE_TUNABLES]: Call __pthread_tunables_init. * nptl/pthreadP.h (MAX_ADAPTIVE_COUNT): Remove. (max_adaptive_count): Define. * nptl/pthread_mutex_conf.c: New file. * nptl/pthread_mutex_conf.h: New file. * sysdeps/generic/adaptive_spin_count.h: New file. * sysdeps/nptl/dl-tunables.list: New file. * nptl/pthread_mutex_lock.c (__pthread_mutex_lock): Use max_adaptive_count () not MAX_ADAPTIVE_COUNT. * nptl/pthread_mutex_timedlock.c (__pthrad_mutex_timedlock): Likewise. Suggested-by: Andi Kleen <andi.kleen@intel.com> Reviewed-by: Carlos O'Donell <carlos@redhat.com> Signed-off-by: Kemi.wang <kemi.wang@intel.com>
* Enable VDSO on i386 statically linked programsRafael Ávila de Espíndola2018-11-302-7/+8
| | | | | | | [BZ #19767] * sysdeps/unix/sysv/linux/i386/init-first.c: Don't check SHARED. * sysdeps/unix/sysv/linux/i386/sysdep.h (ALWAYS_USE_VSYSCALL): New.
* scripts/abilist.awk: Handle special _end symbol for HurdFlorian Weimer2018-11-301-1/+1
| | | | | | | | Hurd has this in libc.so: 0024db9c g D .bss 00000000 GLIBC_2.2.6 _end This g/D combination was not recognized before.
* posix: Use posix_spawn on systemAdhemerval Zanella2018-11-308-255/+118
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch uses posix_spawn on system implementation. On Linux this has the advantage of much lower memory consumption (usually 32 Kb minimum for the mmap stack area). Although POSIX does not require, glibc system implementation aims to be thread and cancellation safe. The cancellation code is moved to generic implementation and enabled iff SIGCANCEL is defined (similar on how the cancellation handler is enabled on nptl-init.c). Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu, arm-linux-gnueabihf, and powerpc64le-linux-gnu. * sysdeps/unix/sysv/linux/spawni.c (__spawni_child): Use __sigismember instead of sigismember. * sysdeps/posix/system.c [SIGCANCEL] (cancel_handler_args, cancel_handler): New definitions. (CLEANUP_HANDLER, CLEANUP_RESET): Likewise. (DO_LOCK, DO_UNLOCK, INIT_LOCK, ADD_REF, SUB_REF): Remove. (do_system): Use posix_spawn instead of fork and execl and remove reentracy code. * sysdeps/generic/not-errno.h (__kill_noerrno): New prototype. * sysdeps/unix/sysv/linux/not-errno.h (__kill_noerrno): Likewise. * sysdeps/unix/sysv/linux/ia64/system.c: Remove file. * sysdeps/unix/sysv/linux/s390/system.c: Likewise. * sysdeps/unix/sysv/linux/sparc/system.c: Likewise. * sysdeps/unix/sysv/linux/system.c: Likewise.
* hurd: Fix returning value for fcntl(F_*LK*)Samuel Thibault2018-11-301-6/+4
| | | | | | | to avoid calling va_end again, etc. * sysdeps/mach/hurd/fcntl.c (__libc_fcntl): Directly return value returned by __f_setlk.
* S390: Regenerate ULPs.Stefan Liebler2018-11-281-12/+8
| | | | | | | | | Regenerated ulps from scratch as builds with gcc 5.5 / 6.4 resulted in +1 ulps. ChangeLog: * sysdeps/s390/fpu/libm-test-ulps: Regenerated.
* Fix Hurd build with read-only source directory.Joseph Myers2018-11-271-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | The logic for generating sysdeps/mach/hurd/bits/errno.h involves a stamp file and $(move-if-change). The temporary file (generated unconditionally) is generated in the source directory. This means that even if sysdeps/mach/hurd/bits/errno.h is up to date, and has an up to date timestamp, the build will fail if the source directory is read-only. Even with a writable source directory, multiple concurrent builds for i686-gnu with the same source directory could race to access the temporary file (which always has the same name). This patch uses the build directory for the temporary file instead to avoid those problems. (In the case where the file is out of date and the temporary file does need to be moved to the source directory, if there are multiple concurrent builds for i686-gnu with the same source directory, and the source and build directories are on different filesystems, it's possible there might still be races replacing the file in the source directory, depending on exactly how mv handles such cross-filesystem moves. This is certainly no worse than the present situation, where such a case would have races regardless of whether the file is out of date or whether different filesystems are in use.) Tested with a build-many-glibcs.py build for i686-gnu. * sysdeps/mach/hurd/Makefile ($(common-objpfx)stamp-errnos): Use $(hurd-objpfx)bits/errno.h-tmp, not $(hurd)/bits/errno.h-tmp.
* CVE-2018-19591: if_nametoindex: Fix descriptor for overlong name [BZ #23927]Florian Weimer2018-11-271-5/+6
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* Enable VDSO for static linking on aarch64Rafael Ávila de Espíndola2018-11-273-10/+8
| | | | | | | | [BZ #19767] * sysdeps/unix/sysv/linux/aarch64/init-first.c: Remove #ifdef SHARED. * sysdeps/unix/sysv/linux/aarch64/libc-vdso.h: Remove #ifdef SHARED. * sysdeps/unix/sysv/linux/aarch64/sysdep.h (ALWAYS_USE_VSYSCALL): Define.
* Enable VDSO on powerpc statically linked programs (bug 19767)Rafael Ávila de Espíndola2018-11-264-9/+10
| | | | | | | | | | | | | [BZ #19767] * sysdeps/unix/sysv/linux/powerpc/init-first.c: Remove #ifdef SHARED. * sysdeps/unix/sysv/linux/powerpc/libc-vdso.h: Remove #ifdef SHARED. Include sysdep.h. * sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h: Define ALWAYS_USE_VSYSCALL. * sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h: Define ALWAYS_USE_VSYSCALL. Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
* Enable VDSO on x86_64 statically linked programs [BZ #19767]Rafael Ávila de Espíndola2018-11-237-10/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | All the required code already existed, and some of it was already running. AT_SYSINFO_EHDR is processed if NEED_DL_SYSINFO_DSO is defined, but it looks like it always is. The call to setup_vdso is also unconditional, so all that was left to do was setup the function pointers and use them. This patch just deletes some #ifdef to enable that. [BZ #19767] * nptl/Makefile (tests-static): Add tst-cond11-static. (tests): Likewise. * nptl/tst-cond11-static.c: New File. * sysdeps/unix/sysv/linux/Makefile (tests-static): Add tst-affinity-static. (tests): Likewise. * sysdeps/unix/sysv/linux/sysdep-vdso.h: Check USE_VSYSCALL instead of SHARED. * sysdeps/unix/sysv/linux/sysdep.h (ALWAYS_USE_VSYSCALL): New. (USE_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/tst-affinity-static.c: New file. * sysdeps/unix/sysv/linux/x86/libc-vdso.h: Check USE_VSYSCALL instead of SHARED. * sysdeps/unix/sysv/linux/x86_64/init-first.c: Don't check SHARED. * sysdeps/unix/sysv/linux/x86_64/sysdep.h (ALWAYS_USE_VSYSCALL): New.
* Fix Arm __ASSUME_COPY_FILE_RANGE (bug 23915).Joseph Myers2018-11-231-3/+4
| | | | | | | | | | | | | | | | | The generic kernel-features.h defines __ASSUME_COPY_FILE_RANGE for 4.5 and later kernels. However, for 32-bit Arm binaries running on 64-bit Arm kernels, the syscall was only wired up in the 4.7 kernel, although the 32-bit Arm kernel had the syscall from 4.5 onwards. This patch corrects the Arm kernel-features.h to undefine the macro for configured minimum kernel versions before 4.7. Tested (compilation only) with a build-many-glibcs.py build for arm-linux-gnueabi. [BZ #23915] * sysdeps/unix/sysv/linux/arm/kernel-features.h [__LINUX_KERNEL_VERSION < 0x040700] (__ASSUME_COPY_FILE_RANGE): Undefine.
* x86/CET: Add a re-exec test with legacy bitmapH.J. Lu2018-11-232-2/+86
| | | | | | | | | | Add a re-exec test with legacy bitmap to verify that legacy bitmap is properly hanlded by kernel. * sysdeps/x86/Makefile (tests): Add tst-cet-legacy-1a. (tst-cet-legacy-1a-ARGS): New. ($(objpfx)tst-cet-legacy-1a): New target. * sysdeps/x86/tst-cet-legacy-1a.c: New file.
* Remove the error handling wrapper from powSzabolcs Nagy2018-11-2133-11/+57
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce new pow symbol version that doesn't do SVID compatible error handling. The standard errno and fp exception based error handling is inline in the new code and does not have significant overhead. The wrapper is disabled for sysdeps/ieee754/dbl-64 by using empty w_pow.c and enabled for targets with their own pow implementation or ifunc dispatch on __ieee754_pow by including math/w_pow.c. The compatibility symbol version still uses the wrapper with SVID error handling around the new code. There is no new symbol version nor compatibility code on !LIBM_SVID_COMPAT targets (e.g. riscv). On targets where previously powl was an alias of pow, now it points to the compatibility symbol with the wrapper, because it still need the SVID compatible error handling. This affects NO_LONG_DOUBLE (e.g. arm) and LONG_DOUBLE_COMPAT (e.g. alpha) targets as well. The __pow_finite symbol is now an alias of pow. Both __pow_finite and pow set errno and thus not const functions. The ia64 asm is changed so the compat and new symbol versions map to the same address. On x86_64 #include <math.h> was added before macro definitions that may affect that header. Tested with build-many-glibcs.py. * math/Versions (GLIBC_2.29): Add pow. * math/w_pow_compat.c (__pow_compat): Change to versioned compat symbol. * math/w_pow.c: New file. * sysdeps/i386/fpu/w_pow.c: New file. * sysdeps/ia64/fpu/e_pow.S: Add versioned symbols. * sysdeps/ieee754/dbl-64/e_pow.c (__ieee754_pow): Rename to __pow and add necessary aliases. * sysdeps/ieee754/dbl-64/w_pow.c: New file. * sysdeps/m68k/m680x0/fpu/w_pow.c: New file. * sysdeps/mach/hurd/i386/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Update. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Update. * sysdeps/unix/sysv/linux/arm/libm.abilist: Update. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Update. * sysdeps/unix/sysv/linux/i386/libm.abilist: Update. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Update. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Update. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Update. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Update. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Update. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Update. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Update. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Update. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Update. * sysdeps/unix/sysv/linux/sh/libm.abilist: Update. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Update. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Update. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Update. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Update. * sysdeps/x86_64/fpu/multiarch/e_pow-fma.c (__ieee754_pow): Rename to __pow. * sysdeps/x86_64/fpu/multiarch/e_pow-fma4.c (__ieee754_pow): Likewise. * sysdeps/x86_64/fpu/multiarch/e_pow.c (__ieee754_pow): Likewise. * sysdeps/x86_64/fpu/multiarch/w_pow.c: New file.
* Remove the error handling wrapper from log2Szabolcs Nagy2018-11-2129-6/+49
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce new log2 symbol version that doesn't do SVID compatible error handling. The standard errno and fp exception based error handling is inline in the new code and does not have significant overhead. The wrapper is disabled for sysdeps/ieee754/dbl-64 by using empty w_log2.c and enabled for targets with their own log2 implementation by including math/w_log2.c. The compatibility symbol version still uses the wrapper with SVID error handling around the new code. There is no new symbol version nor compatibility code on !LIBM_SVID_COMPAT targets (e.g. riscv). On targets where previously log2l was an alias of log2, now it points to the compatibility symbol with the wrapper, because it still need the SVID compatible error handling. This affects NO_LONG_DOUBLE (e.g. arm) and LONG_DOUBLE_COMPAT (e.g. alpha) targets as well. The __log2_finite symbol is now an alias of log2. Both __log2_finite and log2 set errno and thus not const functions. The ia64 asm is changed so the compat and new symbol versions map to the same address. Tested with build-many-glibcs.py. * math/Versions (GLIBC_2.29): Add log2. * math/w_log2_compat.c (__log2_compat): Change to versioned compat symbol. * math/w_log2.c: New file. * sysdeps/i386/fpu/w_log2.c: New file. * sysdeps/ia64/fpu/e_log2.S: Add versioned symbols. * sysdeps/ieee754/dbl-64/e_log2.c (__ieee754_log2): Rename to __log2 and add necessary aliases. * sysdeps/ieee754/dbl-64/w_log2.c: New file. * sysdeps/m68k/m680x0/fpu/w_log2.c: New file. * sysdeps/mach/hurd/i386/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Update. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Update. * sysdeps/unix/sysv/linux/arm/libm.abilist: Update. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Update. * sysdeps/unix/sysv/linux/i386/libm.abilist: Update. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Update. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Update. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Update. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Update. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Update. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Update. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Update. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Update. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Update. * sysdeps/unix/sysv/linux/sh/libm.abilist: Update. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Update. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Update. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Update. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Update.
* Remove the error handling wrapper from logSzabolcs Nagy2018-11-2134-7/+56
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce new log symbol version that doesn't do SVID compatible error handling. The standard errno and fp exception based error handling is inline in the new code and does not have significant overhead. The wrapper is disabled for sysdeps/ieee754/dbl-64 by using empty w_log.c and enabled for targets with their own log implementation by including math/w_log.c. The compatibility symbol version still uses the wrapper with SVID error handling around the new code. There is no new symbol version nor compatibility code on !LIBM_SVID_COMPAT targets (e.g. riscv). On targets where previously logl was an alias of log, now it points to the compatibility symbol with the wrapper, because it still need the SVID compatible error handling. This affects NO_LONG_DOUBLE (e.g. arm) and LONG_DOUBLE_COMPAT (e.g. alpha) targets as well. The __log_finite symbol is now an alias of log. Both __log_finite and log set errno and thus not const functions. The ia64 asm is changed so the compat and new symbol versions map to the same address. On x86_64 #include <math.h> was added before macro definitions that may affect that header. Tested with build-many-glibcs.py. * math/Versions (GLIBC_2.29): Add log. * math/w_log_compat.c (__log_compat): Change to versioned compat symbol. * math/w_log.c: New file. * sysdeps/i386/fpu/w_log.c: New file. * sysdeps/ia64/fpu/e_log.S: Update. * sysdeps/ieee754/dbl-64/e_log.c (__ieee754_log): Rename to __log and add necessary aliases. * sysdeps/ieee754/dbl-64/w_log.c: New file. * sysdeps/m68k/m680x0/fpu/w_log.c: New file. * sysdeps/mach/hurd/i386/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Update. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Update. * sysdeps/unix/sysv/linux/arm/libm.abilist: Update. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Update. * sysdeps/unix/sysv/linux/i386/libm.abilist: Update. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Update. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Update. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Update. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Update. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Update. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Update. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Update. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Update. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Update. * sysdeps/unix/sysv/linux/sh/libm.abilist: Update. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Update. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Update. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Update. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Update. * sysdeps/x86_64/fpu/multiarch/e_log-avx.c (__ieee754_log): Rename to __log. * sysdeps/x86_64/fpu/multiarch/e_log-fma.c (__ieee754_log): Likewise. * sysdeps/x86_64/fpu/multiarch/e_log-fma4.c (__ieee754_log): Likewise. * sysdeps/x86_64/fpu/multiarch/e_log.c (__ieee754_log): Likewise. * sysdeps/x86_64/fpu/multiarch/w_log.c: New file.
* Remove the error handling wrapper from exp and exp2Szabolcs Nagy2018-11-2139-16/+106
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce new exp and exp2 symbol version that don't do SVID compatible error handling. The standard errno and fp exception based error handling is inline in the new code and does not have significant overhead. The double precision wrappers are disabled for sysdeps/ieee754/dbl-64 by using empty w_exp.c and w_exp2.c files, the math/w_exp.c and math/w_exp2.c files use the wrapper template and can be included by targets that have their own exp and exp2 implementations or use ifunc on the glibc internal __ieee754_exp symbol. The compatibility symbol versions still use the wrapper with SVID error handling around the new code. There is no new symbol version nor compatibility code on !LIBM_SVID_COMPAT targets (e.g. riscv). On targets where previously expl and exp2l were aliases of exp and exp2, now they point to the compatibility symbols with the wrapper, because they still need the SVID compatible error handling. This affects NO_LONG_DOUBLE (e.g arm) and LONG_DOUBLE_COMPAT (e.g. alpha) targets as well. The _finite symbols are now aliases of the standard symbols (they have no performance advantage anymore). Both the standard symbols and _finite symbols set errno and thus not const functions. The ia64 asm is changed so the compat and new symbol versions map to the same address. On x86_64 #include <math.h> was added before macro definitions that may affect that header (the new macro name is __exp instead of __ieee754_exp which breaks some math.h macros). Tested with build-many-glibcs.py. * math/Versions (GLIBC_2.29): Add exp and exp2. * math/w_exp2_compat.c (__exp2_compat): Change to versioned compat symbol, handle NO_LONG_DOUBLE and LONG_DOUBLE_COMPAT explicitly. * math/w_exp_compat.c (__exp_compat): Likewise. * math/w_exp.c: New file. * math/w_exp2.c: New file. * sysdeps/i386/fpu/w_exp.c: New file. * sysdeps/i386/fpu/w_exp2.c: New file. * sysdeps/ia64/fpu/e_exp.S: Add versioned symbols. * sysdeps/ia64/fpu/e_exp2.S: Likewise. * sysdeps/ieee754/dbl-64/e_exp.c (__ieee754_exp): Rename to __exp and add necessary aliases. * sysdeps/ieee754/dbl-64/e_exp2.c (__ieee754_exp2): Rename to __exp2 and add necessary aliases. * sysdeps/ieee754/dbl-64/w_exp.c: New file. * sysdeps/ieee754/dbl-64/w_exp2.c: New file. * sysdeps/m68k/m680x0/fpu/w_exp.c: New file. * sysdeps/m68k/m680x0/fpu/w_exp2.c: New file. * sysdeps/mach/hurd/i386/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Update. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Update. * sysdeps/unix/sysv/linux/arm/libm.abilist: Update. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Update. * sysdeps/unix/sysv/linux/i386/libm.abilist: Update. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Update. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Update. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Update. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Update. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Update. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Update. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Update. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Update. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Update. * sysdeps/unix/sysv/linux/sh/libm.abilist: Update. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Update. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Update. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Update. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Update. * sysdeps/x86_64/fpu/multiarch/e_exp-avx.c (__exp1): Remove. (__ieee754_exp): Rename to __exp. * sysdeps/x86_64/fpu/multiarch/e_exp-fma.c (__exp1): Remove. (__ieee754_exp): Rename to __exp. * sysdeps/x86_64/fpu/multiarch/e_exp-fma4.c (__exp1): Remove. (__ieee754_exp): Rename to __exp. * sysdeps/x86_64/fpu/multiarch/e_exp.c (__ieee754_exp): Rename to __exp. * sysdeps/x86_64/fpu/multiarch/w_exp.c: New file.
* [AArch64] Adjust writeback in non-zero memsetWilco Dijkstra2018-11-201-3/+4
| | | | | | | | This fixes an ineffiency in the non-zero memset. Delaying the writeback until the end of the loop is slightly faster on some cores - this shows ~5% performance gain on Cortex-A53 when doing large non-zero memsets. * sysdeps/aarch64/memset.S (MEMSET): Improve non-zero memset loop.
* hurd: Support lockf at offset 0 with size 0 or 1.Samuel Thibault2018-11-191-0/+13
| | | | | | * sysdeps/mach/hurd/f_setlk.c: Include <unistd.h>. (__f_setlk): When whence is SEEK_CUR, use __lseek64 to convert it to SEEK_SET.
* Use STRFMON_LDBL_IS_DBL instead of __ldbl_is_dbl.Zack Weinberg2018-11-162-25/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | On platforms where long double used to have the same format as double, but later switched to a different format (alpha, s390, sparc, and powerpc), accessing the older behavior is possible and it happens via __nldbl_* functions (not on the API, but accessible from header redirection and from compat symbols). These functions write to the global flag __ldbl_is_dbl, which tells other functions that long double variables should be handled as double. This patch takes the first step towards removing this global flag and creates __vstrfmon_l_internal, which takes an explicit flags parameter. This change arguably makes the generated code slightly worse on architectures where __ldbl_is_dbl is never true; right now, on those architectures, it's a compile-time constant; after this change, the compiler could theoretically prove that __vstrfmon_l_internal was never called with a nonzero flags argument, but it would probably need LTO to do it. This is not performance critical code and I tend to think that the maintainability benefits of removing action at a distance are worth it. However, we _could_ wrap the runtime flag check with a macro that was defined to ignore its argument and always return false on architectures where __ldbl_is_dbl is never true, if people think the codegen benefits are important. Tested for powerpc and powerpc64le.
* hurd: Fix F_*LK* fcntl with __USE_FILE_OFFSET64Samuel Thibault2018-11-166-34/+136
| | | | | | | | | | | | | | | | | | struct flock64 uses 64bit values. This introduces other values for F_GETLK, F_SETLK, F_SETLKW to distinguish between both. * sysdeps/mach/hurd/bits/fcntl.h (F_GETLK64, F_SETLK64, F_SETLKW64): New macros [__USE_FILE_OFFSET64] (F_GETLK, F_SETLK, F_SETLKW): Define to F_GETLK64, F_SETLK64, F_SETLKW64, respectively. * sysdeps/mach/hurd/f_setlk.c: New file. * sysdeps/mach/hurd/f_setlk.h: New file. * sysdeps/mach/hurd/Makefile [$(subdir) = io] (sysdeps_routines): Add f_setlk. * sysdeps/mach/hurd/fcntl.c: Include "f_setlk.h".h". (__libc_fcntl): Move non-flock operations to... * sysdeps/mach/hurd/vfcntl.c (__libc_vfcntl): ... New file. * sysdeps/mach/hurd/fcntl.c (fcntl64): Add missing alias.
* hurd: Fix build with GCC 9Samuel Thibault2018-11-141-2/+3
| | | | | | | * sysdeps/mach/hurd/dl-sysdep.c (check_no_hidden): Use __attribute_copy__ to copy attributes from name. Drop static qualifier to avoid warnings about leaf attribute not having effect on static functions.
* Fix mips build with GCC 9.Joseph Myers2018-11-131-1/+6
| | | | | | | | | | | | | This patch fixes the build for MIPS (o32) with GCC 9 by stopping MIPS __longjmp from using strong_alias, instead defining the alias manually, so that the intended effect of not copying the nomips16 attribute is achieved, as explained in the included comment. Tested with build-many-glibcs.py compilers build for mips64-linux-gnu (which includes glibc builds for all three ABIs). * sysdeps/mips/__longjmp.c (__longjmp): Define alias manually with alias attribute, not with strong_alias.
* Add hidden_tls_def macros, fix powerpc-soft build with GCC 9.Joseph Myers2018-11-131-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Soft-float powerpc fails to build with current GCC mainline because of use of libc_hidden_data_def for TLS variables, resulting in a non-TLS alias being defined, to which the tls_model attribute is now copied, resulting in a warning about it being ignored. The problem here appears to be the non-TLS alias. This patch adds a hidden_tls_def macro family, corresponding to the hidden_tls_proto macros, to define TLS aliases properly in such a case, and uses it for those powerpc soft-float variables. Tested with build-many-glibcs.py compilers build for powerpc-linux-gnu soft-float. Also tested for x86_64. * include/libc-symbols.h [SHARED && !NO_HIDDEN && !__ASSEMBLER__] (__hidden_ver2): New macro. Use old definition of __hidden_ver1 with additional parameter thread. [SHARED && !NO_HIDDEN && !__ASSEMBLER__] (__hidden_ver1): Define in terms of __hidden_ver2. (hidden_tls_def): New macro. (libc_hidden_tls_def): Likewise. (rtld_hidden_tls_def): Likewise. (libm_hidden_tls_def): Likewise. (libmvec_hidden_tls_def): Likewise. (libresolv_hidden_tls_def): Likewise. (librt_hidden_tls_def): Likewise. (libdl_hidden_tls_def): Likewise. (libnss_files_hidden_tls_def): Likewise. (libnsl_hidden_tls_def): Likewise. (libnss_nisplus_hidden_tls_def): Likewise. (libutil_hidden_tls_def): Likewise. (libutil_hidden_tls_def): Likweise. * sysdeps/powerpc/nofpu/sim-full.c (__sim_exceptions_thread): Use libc_hidden_tls_def. (__sim_disabled_exceptions_thread): Likewise. (__sim_round_mode_thread): Likewise.
* Fix sparc64 build with GCC 9.Joseph Myers2018-11-131-1/+2
| | | | | | | | | | | | | | | | Similar to the x86_64 and armv7 build issues, glibc fails to build for sparc64 with current mainline GCC because of aliases declared in the course of defining IFUNCs, which copy their attributes from a header declaration, ending up with fewer attributes than the (built-in) string function they alias. This patch fixes the issue similarly to the fixes for those other architectures. Tested with build-many-glibcs.py compilers build for sparc64-linux-gnu. * sysdeps/sparc/sparc-ifunc.h [SHARED] (sparc_ifunc_redirected_hidden_def): Use __attribute_copy__ to copy attributes from name.
* Fix armv7 build with GCC 9.Joseph Myers2018-11-121-1/+2
| | | | | | | | | | | | | | | | | | | Similar to the x86_64 build issues, glibc fails to build for armv7 with current mainline GCC because of aliases declared in the course of defining IFUNCs, which copy their attributes from a header declaration, ending up with fewer attributes than the (built-in) string function they alias: the relevant attributes (nonnull, leaf) are present on the header declaration, but elided therefrom when glibc itself if being built (whatever the reasons are for disabling the nonnull and leaf attributes in that case, and whether or not those reasons are actually still valid). This patch fixes the issue similarly to the x86_64 fix, by adding an addition __attribute_copy__ use (in this case, on the definition of arm_libc_ifunc_hidden_def). Tested with build-many-glibcs.py build for armeb-linux-gnueabi-be8. * sysdeps/arm/arm-ifunc.h [SHARED] (arm_libc_ifunc_hidden_def): Use __attribute_copy__ to copy attributes from name.
* Fix i686 build with GCC 9.Joseph Myers2018-11-126-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes the glibc build for i686 with current mainline GCC, where there are warnings about inconsistent attributes for aliases in certain files defining libm IFUNCs. In three of the files, the aliases were defined in terms of internal symbols such as __sinf, and copied attributes from file-local declarations of those functions which lacked the nothrow attribute. Since the nothrow attribute is present on the declarations from <math.h> (which include declarations of those __-prefixed functions), the natural fix was to include <math.h> in those files, replacing the local declarations. In the other three files, a more complicated __hidden_ver1 call was involved in the warnings. <math.h> has not been included at this point and, furthermore, it is included indirectly only later in the source file after macros have been defined to remap a function name therein. So there isn't an obvious declaration from which to copy the attribute and it seems simplest and safest just to add __THROW to the hidden_ver1 calls. Tested for i686 (build-many-glibcs.py compilers build for x86_64-linux-gnu with GCC mainline; full testsuite run with GCC 7). * sysdeps/i386/i686/fpu/multiarch/e_expf.c [SHARED]: Use __THROW with __hidden_ver1 call. * sysdeps/i386/i686/fpu/multiarch/e_log2f.c [SHARED]: Likewise. * sysdeps/i386/i686/fpu/multiarch/e_logf.c [SHARED]: Likewise. * sysdeps/i386/i686/fpu/multiarch/s_cosf.c: Include <math.h>. (__cosf): Do not declare here. * sysdeps/i386/i686/fpu/multiarch/s_sincosf.c: Include <math.h>. (__sincosf): Do not declare here. * sysdeps/i386/i686/fpu/multiarch/s_sinf.c: Include <math.h>. (__sinf): Do not declare here.
* Remove redundant macro definitions from ia64 sfp-machine.h.Joseph Myers2018-11-121-10/+0
| | | | | | | | | | | | | | | | | | | | After the changes to use the copy attribute, building glibc for ia64 fails, even with older compilers, because sysdeps/ia64/fpu/sfp-machine.h has a definition of _strong_alias that now differs from the one in libc-symbols.h. That definition is a relic of this file coming from libgcc, as are some other such macro definitions in this file; in the glibc context, there is no need for those macros, and this patch removes them to fix the build. Tested with build-many-glibcs.py for ia64-linux-gnu. * sysdeps/ia64/fpu/sfp-machine.h (__LITTLE_ENDIAN): Remove. (__BIG_ENDIAN): Likewise. (__BYTE_ORDER): Likewise. (strong_alias): Likewise. (_strong_alias): Likewise.
* hurd: Document dtable_cloexec size convention.Samuel Thibault2018-11-111-1/+1
| | | | | * sysdeps/mach/hurd/spawni.c (__spawni): Use orig_dtablesize instead of dtablesize for allocating dtable_cloexec.
* Hurd: export _hurd_port_moveSamuel Thibault2018-11-101-0/+1
| | | | | | * hurd/Versions (_hurd_port_move): Export function. * sysdeps/mach/hurd/i386/libc.abilist (_hurd_port_move): Expect symbol.
* Hurd: Fix ulinks in fd table reallocationSamuel Thibault2018-11-101-1/+11
| | | | | | | * hurd/hurd/userlink.h (_hurd_userlink_move): New function. * hurd/hurd/port.h (_hurd_port_move): New function. * sysdeps/mach/hurd/spawni.c (NEW_ULINK_TABLE): New macro. (EXPAND_DTABLE): Use NEW_ULINK_TABLE macro for ulink_dtable.
* Hurd: Implement chdir support in posix_spawnSamuel Thibault2018-11-101-10/+77
| | | | | | | | | | | | This fixes build-many-glibcs.py on i686-gnu. Thanks Florian Weimer for the initial version. * sysdeps/mach/hurd/spawni.c (__spawni): Add ccwdir port. Test and use it, free it if needed. (reauthenticate): Test and use ccwdir. (child_init_port): In non-resetids case, test and use ccwdir. (child_chdir): New nested function to set ccwdir.
* Add support for GCC 9 attribute copy.Martin Sebor2018-11-0918-21/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | GCC 9 has gained an enhancement to help detect attribute mismatches between alias declarations and their targets. It consists of a new warning, -Wattribute-alias, an enhancement to an existing warning, -Wmissing-attributes, and a new attribute called copy. The purpose of the warnings is to help identify either possible bugs (an alias declared with more restrictive attributes than its target promises) or optimization or diagnostic opportunities (an alias target missing some attributes that it could be declared with that might benefit analysis and code generation). The purpose of the new attribute is to easily apply (almost) the same set of attributes to one declaration as those already present on another. As expected (and intended) the enhancement triggers warnings for many alias declarations in Glibc code. This change, tested on x86_64-linux, avoids all instances of the new warnings by making use of the attribute where appropriate. To fully benefit from the enhancement Glibc will need to be compiled with -Wattribute-alias=2 and remaining warnings reviewed and dealt with (there are a couple of thousand but most should be straightforward to deal with). ChangeLog: * include/libc-symbols.h (__attribute_copy__): Define macro unless it's already defined. (_strong_alias): Use __attribute_copy__. (_weak_alias, __hidden_ver1, __hidden_nolink2): Same. * misc/sys/cdefs.h (__attribute_copy__): New macro. * sysdeps/x86_64/multiarch/memchr.c (memchr): Use __attribute_copy__. * sysdeps/x86_64/multiarch/memcmp.c (memcmp): Same. * sysdeps/x86_64/multiarch/mempcpy.c (mempcpy): Same. * sysdeps/x86_64/multiarch/memset.c (memset): Same. * sysdeps/x86_64/multiarch/stpcpy.c (stpcpy): Same. * sysdeps/x86_64/multiarch/strcat.c (strcat): Same. * sysdeps/x86_64/multiarch/strchr.c (strchr): Same. * sysdeps/x86_64/multiarch/strcmp.c (strcmp): Same. * sysdeps/x86_64/multiarch/strcpy.c (strcpy): Same. * sysdeps/x86_64/multiarch/strcspn.c (strcspn): Same. * sysdeps/x86_64/multiarch/strlen.c (strlen): Same. * sysdeps/x86_64/multiarch/strncmp.c (strncmp): Same. * sysdeps/x86_64/multiarch/strncpy.c (strncpy): Same. * sysdeps/x86_64/multiarch/strnlen.c (strnlen): Same. * sysdeps/x86_64/multiarch/strpbrk.c (strpbrk): Same. * sysdeps/x86_64/multiarch/strrchr.c (strrchr): Same. * sysdeps/x86_64/multiarch/strspn.c (strspn): Same.
* Remove __ASSUME_SOCKETCALL.Joseph Myers2018-11-088-25/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The __ASSUME_SOCKETCALL macro in kernel-features.h is no longer used for anything. (It used to be used in defining other macros related to accept4 / recvmmsg / sendmmsg availability, but the code in that area was simplified once we could assume a kernel with those features, whether through a syscall or through socketcall, so allowing those functions to be handled much like other socket operations, without requring __ASSUME_SOCKETCALL.) This patch removes that unused macro. (Note: once we can assume a Linux 4.4 or later kernel, much of the support for using socketcall at all can be removed from glibc, although a few functions may need that support in glibc for longer.) Tested with build-many-glibcs.py. * sysdeps/unix/sysv/linux/kernel-features.h: Remove comment about __ASSUME_SOCKETCALL. * sysdeps/unix/sysv/linux/i386/kernel-features.h (__ASSUME_SOCKETCALL): Remove. * sysdeps/unix/sysv/linux/m68k/kernel-features.h (__ASSUME_SOCKETCALL): Likewise. * sysdeps/unix/sysv/linux/microblaze/kernel-features.h (__ASSUME_SOCKETCALL): Likewise. * sysdeps/unix/sysv/linux/powerpc/kernel-features.h (__ASSUME_SOCKETCALL): Likewise. * sysdeps/unix/sysv/linux/s390/kernel-features.h (__ASSUME_SOCKETCALL): Likewise. * sysdeps/unix/sysv/linux/sh/kernel-features.h (__ASSUME_SOCKETCALL): Likewise. * sysdeps/unix/sysv/linux/sparc/kernel-features.h (__ASSUME_SOCKETCALL): Likewise.
* Check multiple NT_GNU_PROPERTY_TYPE_0 notes [BZ #23509]H.J. Lu2018-11-082-14/+46
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Linkers group input note sections with the same name into one output note section with the same name. One output note section is placed in one PT_NOTE segment. Since new linkers merge input .note.gnu.property sections into one output .note.gnu.property section, there is only one NT_GNU_PROPERTY_TYPE_0 note in one PT_NOTE segment with new linkers. Since older linkers treat input .note.gnu.property section as a generic note section and just concatenate all input .note.gnu.property sections into one output .note.gnu.property section without merging them, we may see multiple NT_GNU_PROPERTY_TYPE_0 notes in one PT_NOTE segment with older linkers. When an older linker is used to created the program on CET-enabled OS, the linker output has a single .note.gnu.property section with multiple NT_GNU_PROPERTY_TYPE_0 notes, some of which have IBT and SHSTK enable bits set even if the program isn't CET enabled. Such programs will crash on CET-enabled machines. This patch updates the note parser: 1. Skip note parsing if a NT_GNU_PROPERTY_TYPE_0 note has been processed. 2. Check multiple NT_GNU_PROPERTY_TYPE_0 notes. [BZ #23509] * sysdeps/x86/dl-prop.h (_dl_process_cet_property_note): Skip note parsing if a NT_GNU_PROPERTY_TYPE_0 note has been processed. Update the l_cet field when processing NT_GNU_PROPERTY_TYPE_0 note. Check multiple NT_GNU_PROPERTY_TYPE_0 notes. * sysdeps/x86/link_map.h (l_cet): Expand to 3 bits, Add lc_unknown.
* Fix __ASSUME_MLOCK2 for ARM, MicroBlaze (bug 23867).Joseph Myers2018-11-072-0/+12
| | | | | | | | | | | | | | | | | | The generic kernel-features.h defines __ASSUME_MLOCK2 for 4.4 and later kernels. However, for 32-bit ARM binaries running on 64-bit ARM kernels, and for MicroBlaze, the syscall was only wired up in the 4.7 kernel. (32-bit ARM kernels did have the syscall from 4.4 onwards.) This patch duly arranges for the macro to be undefined for those architectures for kernels before 4.7. Tested with build-many-glibcs.py for its ARM and MicroBlaze configurations. [BZ #23867] * sysdeps/unix/sysv/linux/arm/kernel-features.h [__LINUX_KERNEL_VERSION < 0x040700] (__ASSUME_MLOCK2): Undefine. * sysdeps/unix/sysv/linux/microblaze/kernel-features.h [__LINUX_KERNEL_VERSION < 0x040700] (__ASSUME_MLOCK2): Undefine.
* RISC-V: don't assume PI mutexes and robust futexes before 4.20 (bug 23864)Andreas Schwab2018-11-071-0/+5
| | | | Support for futex_cmpxchg as only been added to 4.20-rc1.
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-11-12 22:30:14 +0000