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2016-09-19Add <limits.h> integer width macros.Joseph Myers
TS 18661-1 defines macros for the width of integer types, intended for use with the fromfp functions to convert from floating-point types to integer types of any width, in any rounding mode and with control over whether "inexact" is raised. Such macros are, of course, more generally useful than just with those functions. Those macros are added to <limits.h> and <stdint.h>. This patch adds the <limits.h> macros to glibc's header, with the <stdint.h> ones intended to be added in a separate patch (which would add to the NEWS entry created by this patch). I've also added these macros to GCC's headers for GCC 7, but definitions in glibc's <limits.h> are still useful for older GCC, for non-GNU compilers and for when it's _GNU_SOURCE rather than __STDC_WANT_IEC_60559_BFP_EXT__ that implies the macros should be defined since the GCC header only considers __STDC_WANT_IEC_60559_BFP_EXT__ (and for glibc systems, the definitions in GCC's <stdint.h> will only be used with -ffreestanding). Tested for x86_64 and x86. * include/limits.h: Define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION and include <bits/libc-header-start.h> instead of including <features.h>. [__GLIBC_USE (IEC_60559_BFP_EXT)] (CHAR_WIDTH): New macro. [__GLIBC_USE (IEC_60559_BFP_EXT)] (SCHAR_WIDTH): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (UCHAR_WIDTH): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (SHRT_WIDTH): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (USHRT_WIDTH): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (INT_WIDTH): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (UINT_WIDTH): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (LONG_WIDTH): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (ULONG_WIDTH): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (LLONG_WIDTH): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (ULLONG_WIDTH): Likewise. * manual/lang.texi (Width of Type): Document these macros. * stdlib/tst-width.c: New file. * stdlib/Makefile (tests): Add tst-width.
2016-09-18hurd: fix fcntl visibilitySamuel Thibault
* sysdeps/posix/dup.c (__dup): Call __fcntl instead of fcntl.
2016-09-18hurd: fix pathconf visibilitySamuel Thibault
* intl/dcigettext.c (PATH_MAX): Call __pathconf instead of pathconf.
2016-09-15nptl: Consolidate sem_init implementationsAdhemerval Zanella
Current sparc32 sem_init and default one only differ on sem.newsem.pad initialization. This patch removes sparc32 and sparc32v9 sem_init arch specific implementation and set sparc32 to use nptl default one. The default implementation sets the required sem.newsem.pad to 0 (which is ununsed in other architectures). I checked on i686 and a sparc32v9 build. * nptl/sem_init.c (sem_init): Init pad value to 0. * sysdeps/sparc/sparc32/sem_init.c: Remove file. * sysdeps/sparc/sparc32/sparcv9/sem_init.c: Likewise.
2016-09-15rt: Set shm_open as a non cancellation point (BZ #18243)Adhemerval Zanella
This patch changes shm_open to not act as a cancellation point. Cancellation is disable at start and reenable in function exit. It fixes BZ #18243. Tested on x86_64 and i686. [BZ #18243] * rt/Makefile (test): Add tst-shm-cancel. * rt/tst-shm-cancel.c: New file. * sysdeps/posix/shm_open.c: Disable asynchronous cancellation.
2016-09-15nptl: Fix sem_wait and sem_timedwait cancellation (BZ#18243)Adhemerval Zanella
This patch fixes both sem_wait and sem_timedwait cancellation point for uncontended case. In this scenario only atomics are involved and thus the futex cancellable call is not issue and a pending cancellation signal is not handled. The fix is straighforward by calling pthread_testcancel is both function start. Although it would be simpler to call CANCELLATION_P directly, I decided to add an internal pthread_testcancel alias and use it to export less internal implementation on such function. A possible change on how pthread_testcancel is internally implemented would lead to either continue to force use CANCELLATION_P or to adjust its every use. GLIBC testcase also does have tests for uncontended cases, test-cancel12 and test-cancel14.c, however both are flawed by adding another cancellation point just after thread pthread_cleanup_pop: 47 static void * 48 tf (void *arg) 49 { 50 pthread_cleanup_push (cleanup, NULL); 51 52 int e = pthread_barrier_wait (&bar); 53 if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) 54 { 55 puts ("tf: 1st barrier_wait failed"); 56 exit (1); 57 } 58 59 /* This call should block and be cancelable. */ 60 sem_wait (&sem); 61 62 pthread_cleanup_pop (0); 63 64 puts ("sem_wait returned"); 65 66 return NULL; 67 } So sem_{timed}wait does not act on cancellation, pthread_cleanup_pop executes 'cleanup' and then 'puts' acts on cancellation. Since pthread_cleanup_pop removed the clean-up handler, it will ran only once and thus it won't accuse an error to indicate sem_wait has not acted on the cancellation signal. This patch also fixes this behavior by removing the cancellation point 'puts'. It also adds some cleanup on all sem_{timed}wait cancel tests. It partially fixes BZ #18243. Checked on x86_64. [BZ #18243] * nptl/pthreadP.h (__pthread_testcancel): Add prototype and hidden_proto. * nptl/pthread_testcancel.c (pthread_cancel): Add internal aliais definition. * nptl/sem_timedwait.c (sem_timedwait): Add cancellation check for uncontended case. * nptl/sem_wait.c (__new_sem_wait): Likewise. * nptl/tst-cancel12.c (cleanup): Remove wrong cancellation point. (tf): Fix check for uncontended case. (do_test): Likewise. * nptl/tst-cancel13.c (cleanup): Remove wrong cancellation point. (tf): Fix check for uncontended case. (do_test): Likewise. * nptl/tst-cancel14.c (cleanup): Remove wrong cancellation point. (tf): Fix check for uncontended case. (do_test): Likewise. * nptl/tst-cancel15.c (cleanup): Remove wrong cancellation point. (tf): Fix check for uncontended case. (do_test): Likewise.
2016-09-15nptl: Remove sparc sem_waitAdhemerval Zanella
This patch removes the sparc32 sem_wait.c implementation since it is identical to default nptl one. The sparcv9 is no longer required with the removal. Checked with a sparcv9 build. * sysdeps/sparc/sparc32/sem_wait.c: Remove file. * sysdeps/sparc/sparc32/sparcv9/sem_wait.c: Likewise.
2016-09-15nptl: Set sem_open as a non cancellation point (BZ #15765)Adhemerval Zanella
This patch changes sem_open to not act as a cancellation point. Cancellation is disable at start and reenable in function exit. It fixes BZ #15765. Tested on x86_64 and i686. [BZ #15765] * nptl/Makefile (tests): Add tst-sem16. * nptl/tst-sem16.c: New file. * nptl/sem_open.c (sem_open): Disable asynchronous cancellation.
2016-09-15nptl: Consolidate sem_open implementationsAdhemerval Zanella
Current sparc32 sem_open and default one only differ on: 1. Default one contains a 'futex_supports_pshared' check. 2. sem.newsem.pad is initialized to zero. This patch removes sparc32 and sparc32v9 sem_open arch specific implementation and instead set sparc32 to use nptl default one. Using 1. is fine since it should always evaluate 0 for Linux (an optimized away by the compiler). Adding 2. to default implementation should be ok since 'pad' field is used mainly on sparc32 code. I checked on i686 and checked a sparc32v9 build. * nptl/sem_open.c (sem_open): Init pad value to 0. * sysdeps/sparc/sparc32/sem_open.c: Remove file. * sysdeps/sparc/sparc32/sparcv9/sem_open.c: Likewise.
2016-09-15inet: Add __inet6_scopeid_pton function [BZ #20611]Florian Weimer
__inet6_scopeid_pton implements strict validation of numeric scope IDs. Use it in getaddrinfo and __res_vinit.
2016-09-14Remove the ptw-% patternsFlorian Weimer
Nothing depends on the PTW macro anymore, so the mechanism to define PTW for recompliations of libc routines is no longer needed. The source files are still recompiled for the nptl directory, just without the “ptw-” prefix. (Reducing the number of pattern rules in sysd-rules is critical for improving make performance.)
2016-09-13ldbl-128: Use L(x) macro for long double constantsPaul E. Murphy
This runs the attached sed script against these files using a regex which aggressively matches long double literals when not obviously part of a comment. Likewise, 5 digit or less integral constants are replaced with integer constants, excepting the two cases of 0 used in large tables, which are also the only integral values of the form x.0*E0L encountered within these converted files. Likewise, -L(x) is transformed into L(-x). Naturally, the script has a few minor hiccups which are more clearly remedied via the attached fixup patch. Such hiccups include, context-sensitive promotion to a real type, and munging constants inside harder to detect comment blocks.
2016-09-13resolv: Remove _LIBC_REENTRANTFlorian Weimer
2016-09-10Add tests-static to tests in malloc/MakefileSiddhesh Poyarekar
This is a trivial change to add the static tests only to tests-static and then adding all of tests-static to the tests target to make it look consistent with some other Makefiles. This avoids having to duplicate the test names across the two make targets. * malloc/Makefile (tests): Remove individual static test names and just add all of tests-static.
2016-09-10Remove __libc_csu_irel declarationSiddhesh Poyarekar
21ad055803de5dd03606588753c46fbf8a5863b2 removed the function, but missed the declaration in libc-start. Removed and verified that the generated assembly is unchanged. * csu/libc-start.c (__libc_csu_irel): Remove declaration.
2016-09-07Add e500 version of fetestexceptflag.Joseph Myers
When I added fetestexceptflag, I missed that e500 was another case that needed its own version because saved exceptions were not directly stored in a form that could be ANDed with exception bits (they were stored with exceptions in SPE form, but the FE_* macros always use the classic hard-float form). This patch adds an e500 version with the required call to __fexcepts_from_spe to convert from one form to the other. Tested for e500. * sysdeps/powerpc/powerpc32/e500/nofpu/fetestexceptflag.c: New file.
2016-09-07Add femode_t functions: sparc.Joseph Myers
This patch adds SPARC versions of fegetmode and fesetmode. Untested. * sysdeps/sparc/fpu/fegetmode.c: New file. * sysdeps/sparc/fpu/fesetmode.c: Likewise.
2016-09-07Add femode_t functions: sh.Joseph Myers
This patch adds SH versions of fegetmode and fesetmode. Untested. * sysdeps/sh/sh4/fpu/fegetmode.c: New file. * sysdeps/sh/sh4/fpu/fesetmode.c: Likewise.
2016-09-07Add femode_t functions: s390.Joseph Myers
This patch adds S/390 versions of fegetmode and fesetmode. Untested. * sysdeps/s390/fpu/fegetmode.c: New file. * sysdeps/s390/fpu/fesetmode.c: Likewise.
2016-09-07Add femode_t functions: powerpc.Joseph Myers
This patch adds PowerPC versions of fegetmode and fesetmode. * sysdeps/powerpc/fpu/fegetmode.c: New file. * sysdeps/powerpc/fpu/fesetmode.c: Likewise. * sysdeps/powerpc/nofpu/fegetmode.c: Likewise. * sysdeps/powerpc/nofpu/fesetmode.c: Likewise. * sysdeps/powerpc/powerpc32/e500/nofpu/fegetmode.c: Likewise. * sysdeps/powerpc/powerpc32/e500/nofpu/fesetmode.c: Likewise.
2016-09-07Add femode_t functions: mips.Joseph Myers
This patch adds MIPS versions of fegetmode and fesetmode. * sysdeps/mips/fpu/fegetmode.c: New file. * sysdeps/mips/fpu/fesetmode.c: Likewise.
2016-09-07Add femode_t functions: m68k.Joseph Myers
This patch adds M68K versions of fegetmode and fesetmode. Untested. * sysdeps/m68k/fpu/fegetmode.c: New file. * sysdeps/m69k/fpu/fesetmode.c: Likewise.
2016-09-07Add femode_t functions: ia64.Joseph Myers
This patch adds IA64 versions of fegetmode and fesetmode. Untested. * sysdeps/ia64/fpu/fegetmode.c: New file. * sysdeps/ia64/fpu/fesetmode.c: Likewise.
2016-09-07Add femode_t functions: hppa.Joseph Myers
This patch adds HPPA versions of fegetmode and fesetmode. Untested. * sysdeps/hppa/fpu/fegetmode.c: New file. * sysdeps/hppa/fpu/fesetmode.c: Likewise.
2016-09-07Add femode_t functions: arm.Joseph Myers
This patch adds ARM versions of fegetmode and fesetmode. * sysdeps/arm/fegetmode.c: New file. * sysdeps/arm/fesetmode.c: Likewise.
2016-09-07Add femode_t functions: alpha.Joseph Myers
This patch adds Alpha versions of fegetmode and fesetmode. Untested. * sysdeps/alpha/fpu/fegetmode.c: New file. * sysdeps/alpha/fpu/fesetmode.c: Likewise.
2016-09-07Add femode_t functions: aarch64.Joseph Myers
This patch adds AArch64 versions of fegetmode and fesetmode. Untested. * sysdeps/aarch64/fpu/fegetmode.c: New file. * sysdeps/aarch64/fpu/fesetmode.c: Likewise.
2016-09-07Add femode_t functions.Joseph Myers
TS 18661-1 defines a type femode_t to represent the set of dynamic floating-point control modes (such as the rounding mode and trap enablement modes), and functions fegetmode and fesetmode to manipulate those modes (without affecting other state such as the raised exception flags) and a corresponding macro FE_DFL_MODE. This patch series implements those interfaces for glibc. This first patch adds the architecture-independent pieces, the x86 and x86_64 implementations, and the <bits/fenv.h> and ABI baseline updates for all architectures so glibc keeps building and passing the ABI tests on all architectures. Subsequent patches add the fegetmode and fesetmode implementations for other architectures. femode_t is generally an integer type - the same type as fenv_t, or as the single element of fenv_t where fenv_t is a structure containing a single integer (or the single relevant element, where it has elements for both status and control registers) - except where architecture properties or consistency with the fenv_t implementation indicate otherwise. FE_DFL_MODE follows FE_DFL_ENV in whether it's a magic pointer value (-1 cast to const femode_t *), a value that can be distinguished from valid pointers by its high bits but otherwise contains a representation of the desired register contents, or a pointer to a constant variable (the powerpc case; __fe_dfl_mode is added as an exported constant object, an alias to __fe_dfl_env). Note that where architectures (that share a register between control and status bits) gain definitions of new floating-point control or status bits in future, the implementations of fesetmode for those architectures may need updating (depending on whether the new bits are control or status bits and what the implementation does with previously unknown bits), just like existing implementations of <fenv.h> functions that take care not to touch reserved bits may need updating when the set of reserved bits changes. (As any new bits are outside the scope of ISO C, that's just a quality-of-implementation issue for supporting them, not a conformance issue.) As with fenv_t, femode_t should properly include any software DFP rounding mode (and for both fenv_t and femode_t I'd consider that fragment of DFP support appropriate for inclusion in glibc even in the absence of the rest of libdfp; hardware DFP rounding modes should already be included if the definitions of which bits are status / control bits are correct). Tested for x86_64, x86, mips64 (hard float, and soft float to test the fallback version), arm (hard float) and powerpc (hard float, soft float and e500). Other architecture versions are untested. * math/fegetmode.c: New file. * math/fesetmode.c: Likewise. * sysdeps/i386/fpu/fegetmode.c: Likewise. * sysdeps/i386/fpu/fesetmode.c: Likewise. * sysdeps/x86_64/fpu/fegetmode.c: Likewise. * sysdeps/x86_64/fpu/fesetmode.c: Likewise. * math/fenv.h: Update comment on inclusion of <bits/fenv.h>. [__GLIBC_USE (IEC_60559_BFP_EXT)] (fegetmode): New function declaration. [__GLIBC_USE (IEC_60559_BFP_EXT)] (fesetmode): Likewise. * bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/aarch64/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/alpha/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/arm/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/hppa/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/ia64/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/m68k/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/microblaze/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/mips/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/nios2/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/powerpc/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (__fe_dfl_mode): New variable declaration. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/s390/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/sh/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/sparc/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/tile/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/x86/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * manual/arith.texi (FE_DFL_MODE): Document macro. (fegetmode): Document function. (fesetmode): Likewise. * math/Versions (fegetmode): New libm symbol at version GLIBC_2.25. (fesetmode): Likewise. * math/Makefile (libm-support): Add fegetmode and fesetmode. (tests): Add test-femode and test-femode-traps. * math/test-femode-traps.c: New file. * math/test-femode.c: Likewise. * sysdeps/powerpc/fpu/fenv_const.c (__fe_dfl_mode): Declare as alias for __fe_dfl_env. * sysdeps/powerpc/nofpu/fenv_const.c (__fe_dfl_mode): Likewise. * sysdeps/powerpc/powerpc32/e500/nofpu/fenv_const.c (__fe_dfl_mode): Likewise. * sysdeps/powerpc/Versions (__fe_dfl_mode): New libm symbol at version GLIBC_2.25. * sysdeps/nacl/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-09-06X86-64: Add _dl_runtime_resolve_avx[512]_{opt|slow} [BZ #20508]H.J. Lu
There is transition penalty when SSE instructions are mixed with 256-bit AVX or 512-bit AVX512 load instructions. Since _dl_runtime_resolve_avx and _dl_runtime_profile_avx512 save/restore 256-bit YMM/512-bit ZMM registers, there is transition penalty when SSE instructions are used with lazy binding on AVX and AVX512 processors. To avoid SSE transition penalty, if only the lower 128 bits of the first 8 vector registers are non-zero, we can preserve %xmm0 - %xmm7 registers with the zero upper bits. For AVX and AVX512 processors which support XGETBV with ECX == 1, we can use XGETBV with ECX == 1 to check if the upper 128 bits of YMM registers or the upper 256 bits of ZMM registers are zero. We can restore only the non-zero portion of vector registers with AVX/AVX512 load instructions which will zero-extend upper bits of vector registers. This patch adds _dl_runtime_resolve_sse_vex which saves and restores XMM registers with 128-bit AVX store/load instructions. It is used to preserve YMM/ZMM registers when only the lower 128 bits are non-zero. _dl_runtime_resolve_avx_opt and _dl_runtime_resolve_avx512_opt are added and used on AVX/AVX512 processors supporting XGETBV with ECX == 1 so that we store and load only the non-zero portion of vector registers. This avoids SSE transition penalty caused by _dl_runtime_resolve_avx and _dl_runtime_profile_avx512 when only the lower 128 bits of vector registers are used. _dl_runtime_resolve_avx_slow is added and used for AVX processors which don't support XGETBV with ECX == 1. Since there is no SSE transition penalty on AVX512 processors which don't support XGETBV with ECX == 1, _dl_runtime_resolve_avx512_slow isn't provided. [BZ #20495] [BZ #20508] * sysdeps/x86/cpu-features.c (init_cpu_features): For Intel processors, set Use_dl_runtime_resolve_slow and set Use_dl_runtime_resolve_opt if XGETBV suports ECX == 1. * sysdeps/x86/cpu-features.h (bit_arch_Use_dl_runtime_resolve_opt): New. (bit_arch_Use_dl_runtime_resolve_slow): Likewise. (index_arch_Use_dl_runtime_resolve_opt): Likewise. (index_arch_Use_dl_runtime_resolve_slow): Likewise. * sysdeps/x86_64/dl-machine.h (elf_machine_runtime_setup): Use _dl_runtime_resolve_avx512_opt and _dl_runtime_resolve_avx_opt if Use_dl_runtime_resolve_opt is set. Use _dl_runtime_resolve_slow if Use_dl_runtime_resolve_slow is set. * sysdeps/x86_64/dl-trampoline.S: Include <cpu-features.h>. (_dl_runtime_resolve_opt): New. Defined for AVX and AVX512. (_dl_runtime_resolve): Add one for _dl_runtime_resolve_sse_vex. * sysdeps/x86_64/dl-trampoline.h (_dl_runtime_resolve_avx_slow): New. (_dl_runtime_resolve_opt): Likewise. (_dl_runtime_profile): Define only if _dl_runtime_profile is defined.
2016-09-06S390: Support PLT and GOT references in check-localplt.Stefan Liebler
on s390x the test elf/check-localplt is failing after recent commits: "elf: Do not use memalign for TCB/TLS blocks allocation [BZ #17730]" "elf: Avoid using memalign for TLS allocations [BZ #17730]" "elf: dl-minimal malloc needs to respect fundamental alignment" due to "Missing required PLT reference: ld.so: __libc_memalign". After the commits __libc_memalign is only called in elf/dl-minimal.c in malloc() function in ld.so and gcc -O2/-O3 leads to R_390_GLOB_DAT instead of R_390_JMP_SLOT. __libc_memalign is called via function-pointer loaded from GOT instead of calling via a plt-stub. In this case there is the R_390_GLOB_DAT relocation in section .rela.dyn instead of R_390_JMP_SLOT in .rela.plt. This patch marks ld.so: __libc_memalign with R_390_GLOB_DAT in localplt.data to allow both relocations. If build with -fno-optimize-sibling-calls or on s390(31bit) a R_390_JMP_SLOT is generated. ChangeLog: * sysdeps/unix/sysv/linux/s390/localplt.data: Mark ld.so: __libc_memalign with "+ RELA R_390_GLOB_DAT".
2016-09-06malloc: Automated part of conversion to __libc_lockFlorian Weimer
2016-09-05conform tests: call perl with '-I.'Aurelien Jarno
Historically perl includes the current directory in the module search path. Over the time this has been considered as a security issue and the recent vulnerabilities [1] made people to reconsider this behaviour. It is almost sure that this will be removed in the future [2], possibly for the 5.26 release, although this is not yet firmly decided. Debian has decided to backport the patches [3], so the perl binary in unstable do not have '.' in @INC anymore. This behaviour is used in the conform perl scripts to include the GlibcConform module. This patch fixes that by calling perl with '-I.'. This is not a security issue in this case as make ensures that the current directory is $(srcdir)/conform/ when the scripts are called. Passing the full path would do exactly the same. [1] CVE-2016-1238 CVE-2016-6185 [2] https://rt.perl.org/Public/Bug/Display.html?id=127810 [3] https://lists.debian.org/debian-devel-announce/2016/08/msg00013.html Changelog: * conform/Makefile (conformtest-header-tests): Pass -I. to $(PERL). (linknamespace-symlists-tests): Likewise. (linknamespace-header-tests): Likewise.
2016-09-03Set NODELETE flag after checking for NULL pointerAurelien Jarno
The commit b632bdd3 moved the setting of the DF_1_NODELETE flag earlier in the dl_open_worker function. However when calling dlopen with both RTLD_NODELETE and RTLD_NOLOAD, the pointer returned by _dl_map_object is NULL. This condition is checked just after setting the flag, while it should be done before. Fix that. Changelog: [BZ #19810] * elf/dl-open.c (dl_open_worker): Set DF_1_NODELETE flag later. * elf/tst-noload.c: New test case. * elf/Makefile (tests): Add tst-noload.
2016-09-02NaCl: Fix compile error for __dup after libc_hidden_proto addition.Roland McGrath
* sysdeps/nacl/dup.c: Add libc_hidden_def.
2016-09-02Fix generic wait3 after union wait_status removal.Roland McGrath
* sysdeps/posix/wait3.c: Don't treat STAT_LOC as a union, since it's not any more.
2016-09-02NaCl: Fix compile error in clock function.Roland McGrath
* sysdeps/nacl/clock.c (clock): nacl_abi_clock_t -> nacl_irt_clock_t
2016-09-02Inline all support functions for sin and cosSiddhesh Poyarekar
The support functions for sin and cos have a lot of identical functionality, so inlining them gives a pretty decent jump in functionality: ~19% in the sincos function. On SPEC2006 this translates to about 2.1% in the tonto test. * sysdeps/ieee754/dbl-64/s_sin.c (do_cos): Mark as inline. (do_cos_slow): Likewise. (do_sin): Likewise. (do_sin_slow): Likewise. (slow): Likewise. (slow1): Likewise. (slow2): Likewise. (sloww): Likewise. (sloww1): Likewise. (sloww2): Likewise. (bsloww): Likewise. (bsloww1): Likewise. (bsloww2): Likewise. (cslow2): Likewise.
2016-09-02Use do_sin for sin(x) where 0.25 < |x| < 0.855469Siddhesh Poyarekar
The only code looks slightly different from do_sin but on closer examination, should give exactly the same result. Drop it in favour of the do_sin function call. * sysdeps/ieee754/dbl-64/s_sin.c (__sin): Use do_sin.
2016-09-02Consolidate input partitioning into do_cos and do_sinSiddhesh Poyarekar
All calls to do_cos are preceded by code that partitions x into a larger double that gives an offset into the sincos table and a smaller double that is used in a polynomial computation. Consolidate all of them into do_cos and do_sin to reduce code duplication. * sysdeps/ieee754/dbl-64/s_sin.c (do_cos): Accept X and DX as input arguments. Consolidate input partitioning from callers here. (do_cos_slow): Likewise. (do_sin): Likewise. (do_sin_slow): Likewise. (do_sincos_1): Remove the no longer necessary input partitioning. (do_sincos_2): Likewise. (__sin): Likewise. (__cos): Likewise. (slow1): Likewise. (slow2): Likewise. (sloww1): Likewise. (sloww2): Likewise. (bsloww1): Likewise. (bsloww2): Likewise. (cslow2): Likewise.
2016-09-02vfscanf: Avoid multiple reads of multi-byte character widthFlorian Weimer
This avoids a race condition if the process-global locale is changed while vfscanf is running. MB_LEN_MAX is always larger than MB_CUR_MAX, so we might realloc earlier than necessary (but even MB_CUR_MAX could be larger than the minimum required space). The existing length was a bit questionable because str + MB_LEN_MAX might point past the end of the buffer.
2016-09-02vfprintf: Avoid creating a VLA which complicates stack managementFlorian Weimer
2016-09-01Remove unneeded stubs for k_rem_pio2l.Paul E. Murphy
This is only used for the float and double variants. Instead, just add it to the type specific list of files, and remove all stubs, and remove the declaration from math_private.h. I verified x86_64, i486, ia64, m68k, and ppc64 build.
2016-09-01Make common fmin implementation generic.Paul E. Murphy
2016-09-01Make common fmax implementation generic.Paul E. Murphy
Also update aarch64 to ensure the correct s_fmin.c is included. The include order favors including the generated copy.
2016-09-01Make common nextdown implementation generic.Paul E. Murphy
With the exception of those machines using the ldbl-opt in an Implies file, this is a trivial transformation. nextdownl is not subject to the non-trivial versioning rules of the other generated functions, so to keep things simple, it is handled as a one-off case in ldbl-opt to preserve the existing behavior.
2016-09-01Make common fdim implementation generic.Paul E. Murphy
The only difference is the usage of math_narrow_eval when building s_fdiml.c. This should be harmless for long double, but I did observe some code generation changes on m68k, but lack the resources to test it. Likewise, to more easily support overriding symbol generation, the aliasing macros are always conditionally defined on their absence to reduce boilerplate. I also ran builds for i486, ppc64, sparcv9, aarch64, s390x and observed no changes to s_fdim* objects.
2016-09-01Base <sys/quota.h> on Linux kernel headers [BZ #20525]Florian Weimer
Macros which are also defined in <linux/quota.h> are removed, and <linux/quota.h> is included instead. This commit cleans up the definition of fs_to_dq_blocks and struct dqblock and struct dqinfo, too.
2016-08-31ldbl-128: Cleanup e_gammal_r.c after _Float128 renamePaul E. Murphy
2016-08-31ldbl-128: Rename 'long double' to '_Float128'Paul E. Murphy
Add a layer of macro indirection for long double files which need to be built using another typename. Likewise, add the L(num) macro used in a later patch to override real constants. These macros are only defined through the ldbl-128 math_ldbl.h header, thereby implicitly restricting these macros to machines which back long double with an IEEE binary128 format. Likewise, appropriate changes are made for the few files which indirectly include such ldbl-128 files. These changes produce identical binaries for s390x, aarch64, and ppc64.
2016-08-31S390: Do not set FE_INEXACT with feraiseexcept (FE_OWERFLOW|FE_UNDERFLOW).Stefan Liebler
On s390 feraiseexcept (FE_OVERFLOW|FE_UNDERFLOW) sets FE_INEXACT, too. This patch uses z196 zarch load rounded instruction which can suppress FE_INEXACT exception if gcc has z196 support in used configuration. Otherwise FE_INEXACT flag is set as before. The gcc support is tested in a new configure-check. A comment in fsetexcptflg.c is corrected as new exceptions are not executed with the next floating-point instruction if fpc is set with _FPU_SETCW macro. It seems the comment was copied e.g. from sysdeps/x86_64/fpu/fsetexcptflg.c file. ChangeLog: * config.h.in (HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT): New undefine. * sysdeps/s390/configure.ac: Add test for z196 zarch support. * sysdeps/s390/configure: Regenerated. * sysdeps/s390/fpu/fraiseexcpt.c (__feraiseexcept): Use ledbra instruction for raising over-/underflow if z196 zarch is supported by default. * sysdeps/s390/fpu/fsetexcptflg.c (fesetexceptflag): Correct comment.
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