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* Fix semaphore destruction (bug 12674).Carlos O'Donell2015-01-2134-2103/+732
| | | | | | | | | | | | | This commit fixes semaphore destruction by either using 64b atomic operations (where available), or by using two separate fields when only 32b atomic operations are available. In the latter case, we keep a conservative estimate of whether there are any waiting threads in one bit of the field that counts the number of available tokens, thus allowing sem_post to atomically both add a token and determine whether it needs to call futex_wake. See: https://sourceware.org/ml/libc-alpha/2014-12/msg00155.html
* Regenerate INSTALL.Carlos O'Donell2015-01-202-231/+230
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* Update libc.pot:Carlos O'Donell2015-01-202-238/+242
| | | | | | In preparation for providing a tarball to the translation project. * po/libc.pot: Regenerated.
* Commit nios2 port to master.Chung-Lin Tang2015-01-1798-0/+7681
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* S390: Get rid of linknamespace failures for utmp functions.Stefan Liebler2015-01-169-15/+62
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* S390: Get rid of linknamespace failures for string functions.Stefan Liebler2015-01-1616-80/+142
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* Fix powerpc-nofpu fesetenv namespace (bug 17748).Joseph Myers2015-01-142-1/+7
| | | | | | | | | | | | | When fixing namespace issues for <fenv.h> functions I missed one call to fesetenv for powerpc-nofpu. This patch changes this to a call to __fesetenv. Tested for powerpc-nofpu; it fixes the previously observed math.h linknamespace test failures. [BZ #17748] * sysdeps/powerpc/nofpu/feholdexcpt.c (__feholdexcept): Call __fesetenv instead of fesetenv.
* [s390] Define a __tls_get_addr macro to avoid declaring it againSiddhesh Poyarekar2015-01-142-0/+12
| | | | | | | | | | | | | | commit 050f7298e1ecc39887c329037575ccd972071255 added an extern declaration for __tls_get_addr that conflicts with the one in s390 dl-tls.h, based on whether __tls_get_addr is defined as a macro. The rationale seems to be based on the assumption that __tls_get_addr is exported for every architecture and hence an internal non-plt alias is needed. This is not true for s390 though, since it exports __tls_get_offset and not __tls_get_addr. This results in tst-audit9 being stuck in an infinite loop. This patch fixes this by defining a __tls_get_addr macro to itself so as to not use the conflicting declaration.
* powerpc: Fix POWER7/PPC64 performance regression on LEAdhemerval Zanella2015-01-132-588/+285
| | | | | | | | | | | | | | | | | This patch fixes a performance regression on the POWER7/PPC64 memcmp porting for Little Endian. The LE code uses 'ldbrx' instruction to read the memory on byte reversed form, however ISA 2.06 just provide the indexed form which uses a register value as additional index, instead of a fixed value enconded in the instruction. And the port strategy for LE uses r0 index value and update the address value on each compare loop interation. For large compare size values, it adds 8 more instructions plus some more depending of trailing size. This patch fixes it by adding pre-calculate indexes to remove the address update on loops and tailing sizes. For large sizes it shows a considerable gain, with double performance pairing with BE.
* powerpc: Optimized strncmp for POWER8/PPC64Adhemerval Zanella2015-01-137-7/+387
| | | | | | | | | | This patch adds an optimized POWER8 strncmp. The implementation focus on speeding up unaligned cases follwing the ideas of power8 strcmp. The algorithm first check the initial 16 bytes, then align the first function source and uses unaligned loads on second argument only. Aditional checks for page boundaries are done for unaligned cases (where sources alignment are different).
* powerpc: Optimize POWER7 strcmp trailing checksRajalakshmi Srinivasaraghavan2015-01-132-114/+89
| | | | | | This patch optimized the POWER7 trailing check by avoiding using byte read operations and instead use the doubleword already readed with bitwise operations.
* Fix scanf15.c testsuite build on sparc.David S. Miller2015-01-132-0/+6
| | | | * include/signal.h (__sigreturn): Guard with __USE_MISC.
* Remove some references to bcopy/bcmp/bzero.Roland McGrath2015-01-136-11/+16
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* powerpc: Optimized strcmp for POWER8/PPC64Adhemerval Zanella2015-01-137-4/+318
| | | | | | | This patch adds an optimized POWER8 strcmp using unaligned accesses. The algorithm first check the initial 16 bytes, then align the first function source and uses unaligned loads on second argument only. Aditional checks for page boundaries are done for unaligned cases
* powerpc: Optimized st{r,p}ncpy for POWER8/PPC64Adhemerval Zanella2015-01-1310-7/+559
| | | | | | | | | | | | | This patch adds an optimized POWER8 st{r,p}ncpy using unaligned accesses. It shows 10%-80% improvement over the optimized POWER7 one that uses only aligned accesses, specially on unaligned inputs. The algorithm first read and check 16 bytes (if inputs do not cross a 4K page size). The it realign source to 16-bytes and issue a 16 bytes read and compare loop to speedup null byte checks for large strings. Also, different from POWER7 optimization, the null pad is done inline in the implementation using possible unaligned accesses, instead of realying on a memset call. Special case is added for page cross reads.
* powerpc: Optimized strncat for POWER7/PPC64Adhemerval Zanella2015-01-134-270/+35
| | | | | | | | | | | With 3eb38795dbbbd816 (Simplify strncat) the generic algorithms uses strlen, strnlen, and memcpy. This is faster than POWER7 current implementation, especially for unaligned strings (where POWER7 code uses byte-byte operations). This patch removes the assembly implementation and uses a multiarch specialization based on default algorithm calling optimized POWER7 symbols.
* powerpc: Optimized strcat for POWER8/PPC64Adhemerval Zanella2015-01-135-4/+49
| | | | | With new optimized strcpy for POWER8, this patch adds an optimized strcat which uses it along with default implementation at strings/.
* powerpc: Optimized st{r,p}cpy for POWER8/PPC64Adhemerval Zanella2015-01-139-3/+398
| | | | | | | | | | | | This patch adds an optimized POWER8 strcpy using unaligned accesses. For strings up to 16 bytes the implementation first calculate the string size, like strlen, and issues a memcpy. For larger strings, source is first aligned to 16 bytes and then tested over a loop that reads 16 bytes am combine the cmpb results for speedup. Special case is added for page cross reads. It shows 30%-60% improvement over the optimized POWER7 one that uses only aligned accesses.
* Fix memory handling in strxfrm_l [BZ #16009]Leonhard Holz2015-01-135-108/+471
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [Modified from the original email by Siddhesh Poyarekar] This patch solves bug #16009 by implementing an additional path in strxfrm that does not depend on caching the weight and rule indices. In detail the following changed: * The old main loop was factored out of strxfrm_l into the function do_xfrm_cached to be able to alternativly use the non-caching version do_xfrm. * strxfrm_l allocates a a fixed size array on the stack. If this is not sufficiant to store the weight and rule indices, the non-caching path is taken. As the cache size is not dependent on the input there can be no problems with integer overflows or stack allocations greater than __MAX_ALLOCA_CUTOFF. Note that malloc-ing is not possible because the definition of strxfrm does not allow an oom errorhandling. * The uncached path determines the weight and rule index for every char and for every pass again. * Passing all the locale data array by array resulted in very long parameter lists, so I introduced a structure that holds them. * Checking for zero src string has been moved a bit upwards, it is before the locale data initialization now. * To verify that the non-caching path works correct I added a test run to localedata/sort-test.sh & localedata/xfrm-test.c where all strings are patched up with spaces so that they are too large for the caching path.
* Fix wake-up in sysdeps/nptl/fork.c.Torvald Riegel2015-01-132-1/+6
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* Fix ldbl-96 scalblnl underflowing results (bug 17803).Joseph Myers2015-01-124-5/+52
| | | | | | | | | | | | | | | | | | | | | | | The ldbl-96 implementation of scalblnl (used for x86_64 and ia64) uses a condition k <= -63 to determine when a standard underflowing result tiny*__copysignl(tiny,x) should be returned. However, that condition corresponds to values with exponent -16446 or less, and in the case of -16446, the correct result for round-to-nearest depends on whether the value is exactly 0x1p-16446 (half the least subnormal) or more than that. This patch fixes the bug by changing the condition to k <= -64 and accordingly adjusting the exponent by 64 not 63 when converting to a normal value. Tested for x86_64. [BZ #17803] * sysdeps/ieee754/ldbl-96/s_scalblnl.c (twom63): Rename to twom64. Adjust value to 0x1p-64L. (__scalblnl): Only return standard underflowing result for K <= -64 not K <= -63; adjust exponent for underflowing result by 64 not 63. * math/libm-test.inc (scalbn_test_data): Add more tests. (scalbln_test_data): Likewise.
* Fix ldbl-96 scalblnl for subnormal arguments (bug 17834).Joseph Myers2015-01-124-3/+35
| | | | | | | | | | | | | | | | | | | | | | | The ldbl-96 implementation of scalblnl (used for x86_64 and ia64) is incorrect for subnormal arguments (this is a separate bug from bug 17803, which is about underflowing results). There are two problems with the adjustments of subnormal arguments: the "two63" variable multiplied by is actually 0x1p52L not 0x1p63L, so is insufficient to make values normal, and then GET_LDOUBLE_EXP(es,x), used to extract the new exponent, extracts it into a variable that isn't used, while the value taken to by the new exponent is wrongly taken from the high part of the mantissa before the adjustment (hx). This patch fixes both those problems and adds appropriate tests. Tested for x86_64. [BZ #17834] * sysdeps/ieee754/ldbl-96/s_scalblnl.c (two63): Change value to 0x1p63L. (__scalblnl): Get new exponent of adjusted subnormal value from ES not HX. * math/libm-test.inc (scalbn_test_data): Add more tests. (scalbln_test_data): Likewise.
* Add x86 32 bit vDSO time function supportAdhemerval Zanella2015-01-1217-118/+340
| | | | | | | | | | Linux 3.15 adds support for clock_gettime, gettimeofday, and time vDSO (commit id 37c975545ec63320789962bf307f000f08fabd48). This patch adds GLIBC supports to use such symbol when they are avaiable. Along with x86 vDSO support, this patch cleanup x86_64 code by moving all common code to x86 common folder. Only init-first.c is different between implementations.
* powerpc: Fix Copyright dates and CL entryAdhemerval Zanella2015-01-1215-15/+15
| | | | | This patch fixes the copyright dates from files created by commit 8d2c0a5, 4b45943, and 56cf276.
* powerpc: abort transaction in syscallsAdhemerval Zanella2015-01-128-2/+91
| | | | | | | | | | | Linux kernel powerpc documentation states issuing a syscall inside a transaction is not recommended and may lead to undefined behavior. It also states syscalls does not abort transactoin neither they run in transactional state. To avoid side-effects being visible outside transactions, GLIBC with lock elision enabled will issue a transaction abort instruction just before all syscalls if hardware supports hardware transactions.
* powerpc: Add adaptive elision to rwlocksAdhemerval Zanella2015-01-124-3/+130
| | | | | | This patch adds support for lock elision using ISA 2.07 hardware transactional memory for rwlocks. The logic is similar to the one presented in pthread_mutex lock elision.
* powerpc: Add the lock elision using HTMAdhemerval Zanella2015-01-1217-5/+709
| | | | | | | | | | | | This patch adds support for lock elision using ISA 2.07 hardware transactional memory instructions for pthread_mutex primitives. Similar to s390 version, the for elision logic defined in 'force-elision.h' is only enabled if ENABLE_LOCK_ELISION is defined. Also, the lock elision code should be able to be built even with a compiler that does not provide HTM support with builtins. However I have noted the performance is sub-optimal due scheduling pressures.
* Remove 17581 from NEWSAndreas Schwab2015-01-121-6/+6
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* Fix shm-directory.h #include.Roland McGrath2015-01-092-1/+6
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* Remove divide from _ELF_DYNAMIC_DO_RELOC in elf/dynamic-link.h.Chung-Lin Tang2015-01-092-2/+6
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* MicroBlaze: Fix BZ17791 - Remove fixed page size macros and othersMatthew Fortune2015-01-093-9/+9
| | | | | | | | | | | | | | | | | | | | | | Microblaze apparently has a variable page size (see thread below) and should not hard-code any page-size related macros. Also remove macros that are only used for BFD's trad-core support which is not relavant for microblaze also according to the thread starting here: https://sourceware.org/ml/libc-ports/2013-11/msg00028.html This patch is neither built nor tested but mirrors a MIPS patch that fixes the same issue. Thanks, Matthew * sysdepsysdeps/unix/sysv/linux/microblaze/sys/user.h (PAGE_SHIFT, PAGE_SIZE, PAGE_MASK, NBPG, UPAGES): Remove. (HOST_TEXT_START_ADDR, HOST_STACK_END_ADDR): Remove. Signed-off-by: David Holsgrove <david.holsgrove@xilinx.com>
* MicroBlaze: Remove custom lowlevellock.h.Torvald Riegel2015-01-092-303/+4
| | | | | | | | | 2015-01-06 Torvald Riegel <triegel@redhat.com> * sysdeps/unix/sysv/linux/microblaze/lowlevellock.h: Delete file. Signed-off-by: Torvald Riegel <triegel@redhat.com> Signed-off-by: David Holsgrove <david.holsgrove@xilinx.com>
* MicroBlaze: Remove custom pthread_once implementation on microblaze.Torvald Riegel2015-01-092-89/+4
| | | | | | | | | 2015-01-06 Torvald Riegel <triegel@redhat.com> * sysdeps/unix/sysv/linux/microblaze/pthread_once.c: Delete file. Signed-off-by: Torvald Riegel <triegel@redhat.com> Signed-off-by: David Holsgrove <david.holsgrove@xilinx.com>
* MicroBlaze: Avoid pointer to integer conversion warningDavid Holsgrove2015-01-092-2/+7
| | | | | | | | | 2015-01-06 David Holsgrove <david.holsgrove@xilinx.com> * sysdeps/microblaze/jmpbuf-unwind.h (_jmpbuf_sp): Declare SP as void pointer and cast to uintptr_t. Signed-off-by: David Holsgrove <david.holsgrove@xilinx.com>
* MicroBlaze: Fix volatile-register-var warning in READ_THREAD_POINTERDavid Holsgrove2015-01-092-8/+9
| | | | | | | | | | | | Resolves warning: 'optimization may eliminate reads and/or writes to register variables' 2015-01-06 David Holsgrove <david.holsgrove@xilinx.com> * sysdeps/microblaze/nptl/tls.h: Remove inline __microblaze_get_thread_area and update READ_THREAD_POINTER. Signed-off-by: David Holsgrove <david.holsgrove@xilinx.com>
* MicroBlaze: Fix integer-pointer conversion warningDavid Holsgrove2015-01-092-1/+6
| | | | | | | | | 2015-01-06 David Holsgrove <david.holsgrove@xilinx.com> * sysdeps/microblaze/nptl/tls.h (TLS_INIT_TP): Use NULL instead of 0. Signed-off-by: David Holsgrove <david.holsgrove@xilinx.com>
* Some #include cleanup in aio/timer code.Roland McGrath2015-01-083-1/+6
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* Clean up allocrtsig code.Roland McGrath2015-01-086-145/+88
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* Fix copyright year on new stub sys/procfs.h file.Roland McGrath2015-01-081-1/+1
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* NPTL: Fix generic pthread_sigmask.Roland McGrath2015-01-082-1/+8
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* NPTL: Fixed missed conditionalization of setxid hooey.Roland McGrath2015-01-082-0/+5
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* Add stub sys/procfs.h fileRoland McGrath2015-01-084-2/+45
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* NPTL: Refactor cpu_set_t validation to be sysdeps-controlledRoland McGrath2015-01-086-29/+91
| | | | | This removes Linuxisms related to cpu_set_t validation from the generic NPTL code and puts them into a new sysdeps header file.
* Add -Wno-trampolines as neededRichard Henderson2015-01-083-0/+9
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* Add Nios II definitions to elf/elf.h.Chung-Lin Tang2015-01-082-0/+77
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* powerpc: Fix compiler warning on some syscallsAdhemerval Zanella2015-01-085-8/+18
| | | | | | | | | | | | | | | | | GCC 5.0 emits an warning when using sizeof on array function parameters and powerpc internal syscall macros add a check for such cases. More specifically, on powerpc64 and powerpc32 sysdep.h: if (__builtin_classify_type (__arg3) != 5 && sizeof (__arg3) > 8) \ __illegally_sized_syscall_arg3 (); \ And for sysdeps/unix/sysv/linux/utimensat.c build GCC emits: error: ‘sizeof’ on array function parameter ‘tsp’ will return size of ‘const struct timespec *’ This patch uses the address of first struct member instead of the struct itself in syscall macro.
* NEWS for MIPS ABIsMatthew Fortune2015-01-081-0/+20
| | | | * NEWS: Announce support for new MIPS ABI extensions.
* Fix libm feupdateenv namespace (bug 17748).Joseph Myers2015-01-0721-19/+87
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Concluding the fixes for C90 libm functions calling C99 fe* functions, this patch fixes the case of feupdateenv by making it a weak alias for __feupdateenv and making the affected code call __feupdateenv. Tested for x86_64 (testsuite, and that installed stripped shared libraries are unchanged by the patch). Also tested for ARM (soft-float) that the math.h linknamespace tests now pass. [BZ #17748] * include/fenv.h (__feupdateenv): Use libm_hidden_proto. * math/feupdateenv.c (__feupdateenv): Use libm_hidden_def. * sysdeps/aarch64/fpu/feupdateenv.c (feupdateenv): Rename to __feupdateenv and define as weak alias of __feupdateenv. Use libm_hidden_weak. * sysdeps/alpha/fpu/feupdateenv.c (__feupdateenv): Use libm_hidden_def. * sysdeps/arm/feupdateenv.c (feupdateenv): Rename to __feupdateenv and define as weak alias of __feupdateenv. Use libm_hidden_weak. * sysdeps/hppa/fpu/feupdateenv.c (feupdateenv): Likewise. * sysdeps/i386/fpu/feupdateenv.c (__feupdateenv): Use libm_hidden_def. * sysdeps/ia64/fpu/feupdateenv.c (feupdateenv): Rename to __feupdateenv and define as weak alias of __feupdateenv. Use libm_hidden_weak. * sysdeps/m68k/fpu/feupdateenv.c (__feupdateenv): Use libm_hidden_def. * sysdeps/mips/fpu/feupdateenv.c (feupdateenv): Rename to __feupdateenv and define as weak alias of __feupdateenv. Use libm_hidden_weak. * sysdeps/powerpc/fpu/feupdateenv.c (__feupdateenv): Use libm_hidden_def. * sysdeps/powerpc/nofpu/feupdateenv.c (__feupdateenv): Likewise. * sysdeps/powerpc/powerpc32/e500/nofpu/feupdateenv.c (__feupdateenv): Likewise. * sysdeps/s390/fpu/feupdateenv.c (feupdateenv): Rename to __feupdateenv and define as weak alias of __feupdateenv. Use libm_hidden_weak. * sysdeps/sh/sh4/fpu/feupdateenv.c (feupdateenv): Likewise. * sysdeps/sparc/fpu/feupdateenv.c (__feupdateenv): Use libm_hidden_def. * sysdeps/tile/math_private.h (__feupdateenv): New inline function. * sysdeps/x86_64/fpu/feupdateenv.c (__feupdateenv): Use libm_hidden_def. * sysdeps/generic/math_private.h (default_libc_feupdateenv): Call __feupdateenv instead of feupdateenv. (default_libc_feupdateenv_test): Likewise. (libc_feresetround_ctx): Likewise.
* mips: Fix __libc_pread prototypeAdhemerval Zanella2015-01-072-1/+6
| | | | | This patch fixes the __libc_pread prototype change from 14bb4e57c094849228ad8524693ab9432c38396c.
* posix/regcomp: initialize union structure tag to avoid warningChris Metcalf2015-01-072-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | We see some surprising warnings on tilegx with gcc 4.8.2: In file included from regex.c:66:0: regcomp.c: In function ‘parse_expression’: regcomp.c:2849:15: error: ‘end_elem’ may be used uninitialized in this function [-Werror=maybe-uninitialized] else if (br_elem->type == COLL_SYM) ^ regcomp.c:3109:34: note: ‘end_elem’ was declared here bracket_elem_t start_elem, end_elem; ^ regcomp.c:3109:22: error: ‘start_elem’ may be used uninitialized in this function [-Werror=maybe-uninitialized] bracket_elem_t start_elem, end_elem; ^ These warnings are not seen on x86, and in fact if I compile the preprocessed tile sources with the x86 gcc 4.8.2, I don't see the warnings. I do see eqiuvalent warnings if I compile the x86-preprocessed source code with tilegx gcc 4.8.2. The fix here is to initialize the union type field appropriately in a couple of places where we pass a union pointer to a subroutine that "knows" what type the union is. Setting the type explicitly seems like a more robust way to manage such a data structure in any case.
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