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* arm: Simplify elf_machine_{load_address,dynamic}Fangrui Song2021-08-181-37/+10
| | | | | | | | | | and drop reliance on _GLOBAL_OFFSET_TABLE_[0] being the link-time address of _DYNAMIC. &__ehdr_start is a better way to get the load address. This is similar to commits b37b75d269883a2c553bb7019a813094eb4e2dd1 (x86-64) and 43d06ed218fc8be58987bdfd00e21e5720f0b862 (aarch64). Reviewed-by: Joseph Myers <joseph@codesourcery.com>
* riscv: Drop reliance on _GLOBAL_OFFSET_TABLE_[0]Fangrui Song2021-08-181-11/+10
| | | | | | | | | &__ehdr_start is a better way to get the load address. This is similar to commits b37b75d269883a2c553bb7019a813094eb4e2dd1 (x86-64) and 43d06ed218fc8be58987bdfd00e21e5720f0b862 (aarch64). Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
* Remove sysdeps/*/tls-macros.hFangrui Song2021-08-1824-1451/+0
| | | | | | | | They provide TLS_GD/TLS_LD/TLS_IE/TLS_IE macros for TLS testing. Now that we have migrated to __thread and tls_model attributes, these macros are unused and the tls-macros.h files can retire. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* x86_64: Simplify elf_machine_{load_address,dynamic}Fangrui Song2021-08-171-14/+7
| | | | | | | and drop reliance on _GLOBAL_OFFSET_TABLE_[0] being the link-time address of _DYNAMIC. &__ehdr_start is a better way to get the load address. Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
* elf: Drop elf/tls-macros.h in favor of __thread and tls_model attributes [BZ ↵Fangrui Song2021-08-1613-199/+64
| | | | | | | | | | | | | | | | | | | | | | | | | | #28152] [BZ #28205] elf/tls-macros.h was added for TLS testing when GCC did not support __thread. __thread and tls_model attributes are mature now and have been used by many newer tests. Also delete tst-tls2.c which tests .tls_common (unused by modern GCC and unsupported by Clang/LLD). .tls_common and .tbss definition are almost identical after linking, so the runtime test doesn't add additional coverage. Assembler and linker tests should be on the binutils side. When LLD 13.0.0 is allowed in configure.ac (https://sourceware.org/pipermail/libc-alpha/2021-August/129866.html), `make check` result is on par with glibc built with GNU ld on aarch64 and x86_64. As a future clean-up, TLS_GD/TLS_LD/TLS_IE/TLS_IE macros can be removed from sysdeps/*/tls-macros.h. We can add optional -mtls-dialect={gnu2,trad} tests to ensure coverage. Tested on aarch64-linux-gnu, powerpc64le-linux-gnu, and x86_64-linux-gnu. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* hurd: Drop fmh kludgeSamuel Thibault2021-08-161-35/+0
| | | | | | Gnumach's 0650a4ee30e3 implements support for high bits being set in the mask parameter of vm_map. This allows to remove the fmh kludge that was masking away the address range by mapping a dumb area there.
* time: Fix overflow itimer tests on 32-bit systemsStafford Horne2021-08-152-6/+8
| | | | | | | | | | | | | | | | | | | | On the port of OpenRISC I am working on and it appears the rv32 port we have sets __TIMESIZE == 64 && __WORDSIZE == 32. This causes the size of time_t to be 8 bytes, but the tv_sec in the kernel is still 32-bit causing truncation. The truncations are unavoidable on these systems so skip the testing/failures by guarding with __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64. Also, futher in the tests and in other parts of code checking for time_t overflow does not work on 32-bit systems when time_t is 64-bit. As suggested by Adhemerval, update the in_time_t_range function to assume 32-bits by using int32_t. This also brings in the header for stdint.h so we can update other usages of __int32_t to int32_t as suggested by Adhemerval. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* mips: increase stack alignment in clone to match the ABIXi Ruoyao2021-08-131-3/+3
| | | | | | | | | | | | In "mips: align stack in clone [BZ #28223]" (commit 1f51cd9a860ee45eee8a56fb2ba925267a2a7bfe) I made a mistake: I misbelieved one "word" was 2-byte and "doubleword" should be 4-byte. But in MIPS ABI one "word" is defined 32-bit (4-byte), so "doubleword" is 8-byte [1], and "quadword" is 16-byte [2]. [1]: "System V Application Binary Interface: MIPS(R) RISC Processor Supplement, 3rd edition", page 3-31 [2]: "MIPSpro(TM) 64-Bit Porting and Transition Guide", page 23
* mips: align stack in clone [BZ #28223]Xi Ruoyao2021-08-121-0/+7
| | | | | | | | The MIPS O32 ABI requires 4 byte aligned stack, and the MIPS N64 and N32 ABI require 8 byte aligned stack. Previously if the caller passed an unaligned stack to clone the the child misbehaved. Fixes bug 28223.
* librt: add test (bug 28213)Nikita Popov2021-08-122-0/+102
| | | | | | | | | | | | | | | | This test implements following logic: 1) Create POSIX message queue. Register a notification with mq_notify (using NULL attributes). Then immediately unregister the notification with mq_notify. Helper thread in a vulnerable version of glibc should cause NULL pointer dereference after these steps. 2) Once again, register the same notification. Try to send a dummy message. Test is considered successfulif the dummy message is successfully received by the callback function. Signed-off-by: Nikita Popov <npv1310@gmail.com> Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* mtrace: Use a static buffer for printing [BZ #25947]Siddhesh Poyarekar2021-08-121-11/+3
| | | | | | | Use a static buffer for mtrace printing now that it no longer adds to default libc footprint. Reviewed-by: DJ Delorie <dj@redhat.com>
* hurd mmap: Reduce the requested max vmprotSergey Bugaev2021-08-111-4/+18
| | | | | | | When the memory object is read-only, the kernel would be right in refusing max vmprot containing VM_PROT_WRITE. Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
* hurd mmap: Factorize MAP_SHARED flag checkSergey Bugaev2021-08-111-12/+10
| | | | Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
* aarch64: Make elf_machine_{load_address,dynamic} robust [BZ #28203]Fangrui Song2021-08-111-15/+9
| | | | | | | | | | | | | | | | | | | | The AArch64 ABI is largely platform agnostic and does not specify _GLOBAL_OFFSET_TABLE_[0] ([1]). glibc ld.so turns out to be probably the only user of _GLOBAL_OFFSET_TABLE_[0] and GNU ld defines the value to the link-time address _DYNAMIC. [2] In 2012, __ehdr_start was implemented in GNU ld and gold in binutils 2.23. Using adrp+add / (-mcmodel=tiny) adr to access __ehdr_start/_DYNAMIC gives us a robust way to get the load address and the link-time address of _DYNAMIC. [1]: From a psABI maintainer, https://bugs.llvm.org/show_bug.cgi?id=49672#c2 [2]: LLD's aarch64 port does not set _GLOBAL_OFFSET_TABLE_[0] to the link-time address _DYNAMIC. LLD is widely used on aarch64 Android and ChromeOS devices. Software just works without the need for _GLOBAL_OFFSET_TABLE_[0]. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* elf: Unconditionally use __ehdr_startFangrui Song2021-08-104-98/+4
| | | | | | | | | | | | | We can consider __ehdr_start (from binutils 2.23 onwards) unconditionally supported, since configure.ac requires binutils>=2.25. The configure.ac check is related to an ia64 bug fixed by binutils 2.24. See https://sourceware.org/pipermail/libc-alpha/2014-August/053503.html Tested on x86_64-linux-gnu. Tested build-many-glibcs.py with aarch64-linux-gnu and s390x-linux-gnu. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* hurd: Add support for AT_NO_AUTOMOUNTSamuel Thibault2021-08-101-0/+6
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* [5/5] AArch64: Improve A64FX memset medium loopsWilco Dijkstra2021-08-101-26/+19
| | | | | | | Simplify the code for memsets smaller than L1. Improve the unroll8 and L1_prefetch loops. Reviewed-by: Naohiro Tamura <naohirot@fujitsu.com>
* [4/5] AArch64: Improve A64FX memset by removing unroll32Wilco Dijkstra2021-08-101-17/+1
| | | | | | Remove unroll32 code since it doesn't improve performance. Reviewed-by: Naohiro Tamura <naohirot@fujitsu.com>
* [3/5] AArch64: Improve A64FX memset for remaining bytesWilco Dijkstra2021-08-101-33/+13
| | | | | | | Simplify handling of remaining bytes. Avoid lots of taken branches and complex whilelo computations, instead unconditionally write vectors from the end. Reviewed-by: Naohiro Tamura <naohirot@fujitsu.com>
* [2/5] AArch64: Improve A64FX memset for large sizesWilco Dijkstra2021-08-101-60/+25
| | | | | | | | Improve performance of large memsets. Simplify alignment code. For zero memset use DC ZVA, which almost doubles performance. For non-zero memsets use the unroll8 loop which is about 10% faster. Reviewed-by: Naohiro Tamura <naohirot@fujitsu.com>
* [1/5] AArch64: Improve A64FX memset for small sizesWilco Dijkstra2021-08-101-60/+36
| | | | | | | | Improve performance of small memsets by reducing instruction counts and improving code alignment. Bench-memset shows 35-45% performance gain for small sizes. Reviewed-by: Naohiro Tamura <naohirot@fujitsu.com>
* Use binutils 2.37 branch in build-many-glibcs.pyJoseph Myers2021-08-091-1/+1
| | | | | | This patch makes build-many-glibcs.py use binutils 2.37 branch. Tested with build-many-glibcs.py (compilers and glibcs builds).
* Add PTRACE_GET_RSEQ_CONFIGURATION from Linux 5.13 to sys/ptrace.hJoseph Myers2021-08-099-7/+52
| | | | | | | | | | | Linux 5.13 adds a PTRACE_GET_RSEQ_CONFIGURATION constant, with an associated ptrace_rseq_configuration structure. Add this constant to the various sys/ptrace.h headers in glibc, with the structure in bits/ptrace-shared.h (named struct __ptrace_rseq_configuration in glibc, as with other such structures). Tested for x86_64, and with build-many-glibcs.py.
* librt: fix NULL pointer dereference (bug 28213)Nikita Popov2021-08-091-1/+1
| | | | | | | | | | | | | | | | | Helper thread frees copied attribute on NOTIFY_REMOVED message received from the OS kernel. Unfortunately, it fails to check whether copied attribute actually exists (data.attr != NULL). This worked earlier because free() checks passed pointer before actually attempting to release corresponding memory. But __pthread_attr_destroy assumes pointer is not NULL. So passing NULL pointer to __pthread_attr_destroy will result in segmentation fault. This scenario is possible if notification->sigev_notify_attributes == NULL (which means default thread attributes should be used). Signed-off-by: Nikita Popov <npv1310@gmail.com> Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* powerpc64: Add checks for Altivec and VSX in ifunc selectionAnton Blanchard2021-08-0626-68/+139
| | | | | | | We'd like to support processors without Altivec or VSX, so check the relevant hwcap bits before selecting them. Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
* powerpc64: Check cacheline size before using optimised memset routinesAnton Blanchard2021-08-062-10/+23
| | | | | | | A number of optimised memset routines assume the cacheline size is 128B, so we better check before using them. Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
* powerpc64: Replace some PPC_FEATURE_HAS_VSX with PPC_FEATURE_ARCH_2_06Anton Blanchard2021-08-0620-38/+38
| | | | | | | | We use PPC_FEATURE_HAS_VSX to select a number of POWER7 optimised functions. These functions don't use any VSX instructions, so PPC_FEATURE_ARCH_2_06 seems like a better fit. Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
* Linux: Fix fcntl, ioctl, prctl redirects for _TIME_BITS=64 (bug 28182)Florian Weimer2021-08-063-7/+7
| | | | | | | | | | | | | __REDIRECT and __THROW are not compatible with C++ due to the ordering of the __asm__ alias and the throw specifier. __REDIRECT_NTH has to be used instead. Fixes commit 8a40aff86ba5f64a3a84883e539cb67b ("io: Add time64 alias for fcntl"), commit 82c395d91ea4f69120d453aeec398e30 ("misc: Add time64 alias for ioctl"), commit b39ffab860cd743a82c91946619f1b8158 ("Linux: Add time64 alias for prctl"). Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* Add INADDR_DUMMY from Linux 5.13 to netinet/in.hJoseph Myers2021-08-051-0/+3
| | | | | | | | Linux 5.13 adds an INADDR_DUMMY definition; add a corresponding definition to glibc's netinet/in.h. (This isn't strictly a new kernel interface, rather a value defined in RFC 7600.) Tested for x86_64.
* tst-mxfast: Don't run with mcheckSiddhesh Poyarekar2021-08-051-1/+2
| | | | | The test may not show predictable behaviour with -lmcheck since the padding won't always guarantee fastbin usage.
* rt: Set the correct message queue for tst-mqueue10Adhemerval Zanella2021-08-041-2/+2
| | | | Checked on x86_64-linux-gnu.
* Update sparc libm-test-ulpsAdhemerval Zanella2021-08-041-1/+1
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* linux: Add sparck brk implementationAdhemerval Zanella2021-08-041-0/+58
| | | | | | | | | | | It turned that the generic implementation of brk() does not work for sparc, since on failure kernel will just return the previous input value without setting the conditional register. This patches adds back a sparc32 and sparc64 implementation removed by 720480934ab9107. Checked on sparc64-linux-gnu and sparcv9-linux-gnu.
* test-dlclose-exit-race: avoid hang on pthread_create errorDJ Delorie2021-08-041-1/+13
| | | | | | | | | | | | | | | This test depends on the "last" function being called in a different thread than the "first" function, as "last" posts a semaphore that "first" is waiting on. However, if pthread_create fails - for example, if running in an older container before the clone3()-in-container-EPERM fixes - exit() is called in the same thread as everything else, the semaphore never gets posted, and first hangs. The fix is to pre-post that semaphore before a single-threaded exit. Reviewed-by: Arjun Shankar <arjun@redhat.com>
* gethosts: Remove unused argument _typeSiddhesh Poyarekar2021-08-041-3/+3
| | | | The generated code is unchanged.
* hurd: Avoid spurious warningSamuel Thibault2021-08-031-1/+1
| | | | | Compilers missing some flow analysis may think ss may be used uninitialized.
* gaiconf_init: Avoid double-free in label and precedence listsSiddhesh Poyarekar2021-08-031-0/+2
| | | | | | | labellist and precedencelist could get freed a second time if there are allocation failures, so set them to NULL to avoid a double-free. Reviewed-by: Arjun Shankar <arjun@redhat.com>
* copy_and_spawn_sgid: Avoid double calls to close()Siddhesh Poyarekar2021-08-031-0/+1
| | | | | | | If close() on infd and outfd succeeded, reset the fd numbers so that we don't attempt to close them again. Reviewed-by: Arjun Shankar <arjun@redhat.com>
* iconv_charmap: Close output file when doneSiddhesh Poyarekar2021-08-031-0/+2
| | | | Reviewed-by: Arjun Shankar <arjun@redhat.com>
* gconv_parseconfdir: Fix memory leakSiddhesh Poyarekar2021-08-031-5/+4
| | | | | | | The allocated `conf` would leak if we have to skip over the file due to the underlying filesystem not supporting dt_type. Reviewed-by: Arjun Shankar <arjun@redhat.com>
* ldconfig: avoid leak on empty paths in config fileSiddhesh Poyarekar2021-08-031-1/+5
| | | | Reviewed-by: Arjun Shankar <arjun@redhat.com>
* Fix build of nptl/tst-thread_local1.cc with GCC 12Joseph Myers2021-08-021-0/+1
| | | | | | | | | | | | | | | The test nptl/tst-thread_local1.cc fails to build with GCC mainline because of changes to what libstdc++ headers implicitly include what other headers: tst-thread_local1.cc: In function 'int do_test()': tst-thread_local1.cc:177:5: error: variable 'std::array<std::pair<const char*, std::function<void(void* (*)(void*))> >, 2> do_thread_X' has initializer but incomplete type 177 | do_thread_X | ^~~~~~~~~~~ Fix this by adding an explicit include of <array>. Tested with build-many-glibcs.py for aarch64-linux-gnu.
* nis: Fix leak on realloc failure in nis_getnames [BZ #28150]Robbie Harwood2021-08-021-4/+4
| | | | | | | | | | | If pos >= count but realloc fails, tmp will not have been placed in getnames[pos] yet, and so will not be freed in free_null. Detected by Coverity. Also remove misleading comment from nis_getnames(), since it actually did properly release getnames when out of memory. Tested-by: Carlos O'Donell <carlos@redhat.com>
* Remove obsolete comments/name from several benchtest input files.Paul Zimmermann2021-08-026-23/+0
| | | | | | | | These comments refer to slow paths that were removed in glibc 2.34 or earlier. The corresponding "names" that yield separate workload traces for "make bench" are thus obsolete. We are however keeping the corresponding inputs. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* Remove obsolete comments/name from acos-inputs, since slow path was removed.Paul Zimmermann2021-08-021-3/+0
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* Open master branch for glibc 2.35 developmentglibc-2.34.9000Carlos O'Donell2021-08-012-2/+26
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* Update ChangeLog.old/ChangeLog.23.glibc-2.34Carlos O'Donell2021-08-011-0/+32243
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* Prepare for glibc 2.34 release.Carlos O'Donell2021-08-012-3/+3
| | | | Update version.h, and include/features.h.
* po/nl.po: Update Dutch translation.Carlos O'Donell2021-08-011-6/+72
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* Update install.texi, and regenerate INSTALL.Carlos O'Donell2021-08-012-8/+8
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