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2016-06-18MIPS, SPARC: fix wrong vfork aliases in libpthread.soAurelien Jarno
With recent binutils versions the GNU libc fails to build on at least MISP and SPARC, with this kind of error: /home/aurel32/glibc/glibc-build/nptl/libpthread.so:(*IND*+0x0): multiple definition of `vfork@GLIBC_2.0' /home/aurel32/glibc/glibc-build/nptl/libpthread.so::(.text+0xee50): first defined here It appears that on these architectures pt-vfork.S includes vfork.S (through the alpha version of pt-vfork.S) and that the __vfork aliases are not conditionalized on IS_IN (libc) like on other architectures. Therefore the aliases are also wrongly included in libpthread.so. Fix this by properly conditionalizing the aliases like on other architectures. Changelog: * sysdeps/unix/sysv/linux/mips/vfork.S (__vfork): Conditionalize hidden_def, weak_alias and strong_alias on [IS_IN (libc)]. * sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S: Likewise.
2016-06-16Add nextup and nextdown math functionsRajalakshmi Srinivasaraghavan
TS 18661 adds nextup and nextdown functions alongside nextafter to provide support for float128 equivalent to it. This patch adds nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf to libm before float128 support. The nextup functions return the next representable value in the direction of positive infinity and the nextdown functions return the next representable value in the direction of negative infinity. These are currently enabled as GNU extensions.
2016-06-14Fix i386 fdim double rounding (bug 20255).Joseph Myers
fdim suffers from double rounding on i386 because subtracting two double values can produce an inexact long double value exactly half way between two double values. This patch fixes this by creating an i386-specific version of fdim - C, based on the generic version, unlike the previous .S version - which sets the x87 precision control to double precision for the subtraction and then restores it afterwards. As noted in the comment added, there are no issues of double rounding for subnormals (a case that setting precision control does not address) because subtraction cannot produce an inexact result in the subnormal range. Tested for x86_64 and x86. [BZ #20255] * sysdeps/i386/fpu/s_fdim.c: New file. Based on math/s_fdim.c. * math/libm-test.inc (fdim_test_data): Add another test.
2016-06-14Use generic fdim on more architectures (bug 6796, bug 20255, bug 20256).Joseph Myers
Some architectures have their own versions of fdim functions, which are missing errno setting (bug 6796) and may also return sNaN instead of qNaN for sNaN input, in the case of the x86 / x86_64 long double versions (bug 20256). These versions are not actually doing anything that a compiler couldn't generate, just straightforward comparisons / arithmetic (and, in the x86 / x86_64 case, testing for NaNs with fxam, which isn't actually needed once you use an unordered comparison and let the NaNs pass through the same subtraction as non-NaN inputs). This patch removes the x86 / x86_64 / powerpc versions, so that those architectures use the generic C versions, which correctly handle setting errno and deal properly with sNaN inputs. This seems better than dealing with setting errno in lots of .S versions. The i386 versions also return results with excess range and precision, which is not appropriate for a function exactly defined by reference to IEEE operations. For errno setting to work correctly on overflow, it's necessary to remove excess range with math_narrow_eval, which this patch duly does in the float and double versions so that the tests can reliably pass on x86. For float, this avoids any double rounding issues as the long double precision is more than twice that of float. For double, double rounding issues will need to be addressed separately, so this patch does not fully fix bug 20255. Tested for x86_64, x86 and powerpc. [BZ #6796] [BZ #20255] [BZ #20256] * math/s_fdim.c: Include <math_private.h>. (__fdim): Use math_narrow_eval on result. * math/s_fdimf.c: Include <math_private.h>. (__fdimf): Use math_narrow_eval on result. * sysdeps/i386/fpu/s_fdim.S: Remove file. * sysdeps/i386/fpu/s_fdimf.S: Likewise. * sysdeps/i386/fpu/s_fdiml.S: Likewise. * sysdeps/i386/i686/fpu/s_fdim.S: Likewise. * sysdeps/i386/i686/fpu/s_fdimf.S: Likewise. * sysdeps/i386/i686/fpu/s_fdiml.S: Likewise. * sysdeps/powerpc/fpu/s_fdim.c: Likewise. * sysdeps/powerpc/fpu/s_fdimf.c: Likewise. * sysdeps/powerpc/powerpc32/fpu/s_fdim.c: Likewise. * sysdeps/powerpc/powerpc64/fpu/s_fdim.c: Likewise. * sysdeps/x86_64/fpu/s_fdiml.S: Likewise. * math/libm-test.inc (fdim_test_data): Expect errno setting on overflow. Add sNaN tests.
2016-06-14powerpc: strcasecmp/strncasecmp optmization for power8raji
This implementation utilizes vectors to improve performance compared to current byte by byte implementation for POWER7. The performance improvement is upto 4x. This patch is tested on powerpc64 and powerpc64le.
2016-06-13Fix dbl-64 atan2 (sNaN, qNaN) (bug 20252).Joseph Myers
The dbl-64 implementation of atan2, passed arguments (sNaN, qNaN), fails to raise the "invalid" exception. This patch fixes it to add both arguments, rather than just adding the second argument to itself, in the case where the second argument is a NaN (which is checked for before checking for the first argument being a NaN). sNaN tests for atan2 are added, along with some qNaN tests I noticed were missing but should have been there by analogy with other tests present. Tested for x86_64 and x86. [BZ #20252] * sysdeps/ieee754/dbl-64/e_atan2.c (__ieee754_atan2): Add both arguments when second argument is a NaN. * math/libm-test.inc (atan2_test_data): Add sNaN tests and more qNaN tests.
2016-06-13Fix frexp (NaN) (bug 20250).Joseph Myers
Various implementations of frexp functions return sNaN for sNaN input. This patch fixes them to add such arguments to themselves so that qNaN is returned. Tested for x86_64, x86, mips64 and powerpc. [BZ #20250] * sysdeps/i386/fpu/s_frexpl.S (__frexpl): Add non-finite input to itself. * sysdeps/ieee754/dbl-64/s_frexp.c (__frexp): Add non-finite or zero input to itself. * sysdeps/ieee754/dbl-64/wordsize-64/s_frexp.c (__frexp): Likewise. * sysdeps/ieee754/flt-32/s_frexpf.c (__frexpf): Likewise. * sysdeps/ieee754/ldbl-128/s_frexpl.c (__frexpl): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_frexpl.c (__frexpl): Likewise. * sysdeps/ieee754/ldbl-96/s_frexpl.c (__frexpl): Likewise. * math/libm-test.inc (frexp_test_data): Add sNaN tests.
2016-06-13Remove __ASSUME_FUTEX_LOCK_PIAdhemerval Zanella
This patch removes __ASSUME_FUTEX_LOCK_PI usage and assumes that kernel will correctly return if it supports or not futex_atomic_cmpxchg_inatomic. Current PI mutex code already has runtime support by calling prio_inherit_missing and returns ENOTSUP if the futex operation fails at initialization (it issues a FUTEX_UNLOCK_PI futex operation). Also, current minimum supported kernel (v3.2) will return ENOSYS if futex_atomic_cmpxchg_inatomic is not supported in the system: kernel/futex.c: 2628 long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout, 2629 u32 __user *uaddr2, u32 val2, u32 val3) 2630 { 2631 int ret = -ENOSYS, cmd = op & FUTEX_CMD_MASK; [...] 2667 case FUTEX_UNLOCK_PI: 2668 if (futex_cmpxchg_enabled) 2669 ret = futex_unlock_pi(uaddr, flags); [...] 2686 return ret; 2687 } The futex_cmpxchg_enabled is initialized by calling cmpxchg_futex_value_locked, which calls futex_atomic_cmpxchg_inatomic. For ARM futex_atomic_cmpxchg_inatomic will be either defined (if both CONFIG_CPU_USE_DOMAINS and CONFIG_SMP are not defined) or use the default generic implementation that returns ENOSYS. For m68k is uses the default generic implementation. For mips futex_atomic_cmpxchg_inatomic will return ENOSYS if cpu has no 'cpu_has_llsc' support (defined by each chip supporte inside kernel). For sparc, 32-bit kernel will just use default generic implementation, while 64-bit kernel has support. Tested on ARM (v3.8 kernel) and x86_64. * nptl/pthread_mutex_init.c [__ASSUME_FUTEX_LOCK_PI] (prio_inherit_missing): Remove define. * sysdeps/unix/sysv/linux/arm/kernel-features.h (__ASSUME_FUTEX_LOCK_PI): Likewise. * sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_FUTEX_LOCK_PI): Likewise. * sysdeps/unix/sysv/linux/m68k/kernel-features.h (__ASSUME_FUTEX_LOCK_PI): Likewise. * sysdeps/unix/sysv/linux/mips/kernel-features.h (__ASSUME_FUTEX_LOCK_PI): Likewise. * sysdeps/unix/sysv/linux/sparc/kernel-features.h (__ASSUME_FUTEX_LOCK_PI): Likewise.
2016-06-10Revert {send,sendm,recv,recvm}msg conformance changesAdhemerval Zanella
After some discussion in libc-alpha about this POSIX compliance fix, I see that GLIBC should indeed revert back to previous definition of msghdr and cmsghdr and implementation of sendmsg, recvmsg, sendmmsg, recvmmsg due some reasons: * The possible issue where the syscalls wrapper add the compatibility layer is quite limited in scope and range. And kernel current also add some limits to the values on the internal msghdr and cmsghdr fields: - msghdr::msg_iovlen larger than UIO_MAXIOV (1024) returns EMSGSIZE. - msghdr::msg_controllen larger than INT_MAX returns ENOBUFS. * There is a small performance hit for recvmsg/sendmsg/recmmsg which is neglectable, but it is a big hit for sendmmsg since now instead of calling the syscall for the packed structure, GLIBC is calling multiple sendmsg. This defeat the very existence of the syscall. * It currently breaks libsanitizer build on GCC [1] (I fixed on compiler-rt). However the fix is incomplete because it does add any runtime check since libsanitizer currently does not have any facility to intercept symbols with multiple version [2]. This, along with incorret dlsym/dlvsym return for versioned symbol due another bug [3], makes hard to interpose versioned symbols. Also, current approach of fixing GCC PR#71445 leads to half-baked solutions without versioned symbol interposing. This patch basically reverts commits 2f0dc39029ae08, 222c2d7f4357d66, af7f7c7ec8dea1. I decided to not revert abf29edd4a3918 (Adjust kernel-features.h defaults for recvmsg and sendmsg) mainly because it does not really address the POSIX compliance original issue and also adds some cleanups. Tested on x86, i386, s390, s390x, aarch64, and powerpc64le. [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71445 [2] https://github.com/google/sanitizers/issues/628 [3] https://sourceware.org/bugzilla/show_bug.cgi?id=14932 * conform/data/sys/socket.h-data (msghdr.msg_iovlen): Add xfail-. (msghdr.msg_controllen): Likewise. (cmsghdr.cmsg_len): Likewise. * nptl/Makefile (libpthread-routines): Remove ptw-oldrecvmsg and ptw-oldsendmsg. (CFLAGS-oldrecvmsg.c): Remove rule. (CFLAGS-oldsendmsg.c): Likewise. (CFLAGS-recvmsg.c): Add rule. (CFLAGS-sendmsg.c): Likewise. * sysdeps/unix/sysv/linux/Makefile (sysdep_routines): Remove oldrecvmsg, oldsendmsg, oldrecvmmsg, oldsendmmsg. (CFLAGS-recvmsg.c): Remove rule. (CFLAGS-sendmsg.c): Likewise. (CFLAGS-oldrecvmsg.c): Likewise. (CFLAGS-oldsendmsg.c): Likewise. (CFLAGS-recvmmsg.c): Likewise. * sysdeps/unix/sysv/linux/bits/socket.h (msghdr.msg_iovlen): Revert to kernel defined interfaces. (msghdr.msg_controllen): Likewise. (cmsghdr.cmsg_len): Likewise. (msghdr.__glibc_reserved1): Remove member. (msghdr.__glibc_reserved2): Likewise. (cmsghdr.__glibc_reserved1): Likewise. * sysdeps/unix/sysv/linux/oldrecvmmsg.c: Remove file. * sysdeps/unix/sysv/linux/oldrecvmsg.c: Likewise. * sysdeps/unix/sysv/linux/oldsendmmsg.c: Likewise. * sysdeps/unix/sysv/linux/oldsendmsg.c: Likewise. * sysdeps/unix/sysv/linux/recvmmsg.c: Revert back to previous version. * sysdeps/unix/sysv/linux/recvmsg.c: Likewise. * sysdeps/unix/sysv/linux/sendmmsg.c: Likewise. * sysdeps/unix/sysv/linux/sendmsg.c: Likewise. * sysdeps/unix/sysv/linux/aarch64/Versions [libc] (GLIBC_2.24): Remove recvmsg and sendmsg. * sysdeps/unix/sysv/linux/alpha/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/hppa/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/i386/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/m68k/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/microblaze/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/mips/mips32/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n32/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/nios2/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/powerpc/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/sh/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/sparc/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/tile/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/x86_64/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/Versions: Remove file * sysdeps/unix/sysv/linux/x86_64/64/Versions: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n64/Versions: Likewise. * sysdeps/unix/sysv/linux/aarch64/libc.abilist: Remove new 2.24 version for {recv,send,recm,sendm}msg. * 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/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/s390/s390-32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/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/tile/tilegx/tilegx32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise.
2016-06-09Fix i386/x86_64 log2l (sNaN) (bug 20235).Joseph Myers
The i386/x86_64 versions of log2l return sNaN for sNaN input. This patch fixes them to add NaN inputs to themselves so that qNaN is returned in this case. Tested for x86_64 and x86. [BZ #20235] * sysdeps/i386/fpu/e_log2l.S (__ieee754_log2l): Add NaN input to itself. * sysdeps/x86_64/fpu/e_log2l.S (__ieee754_log2l): Likewise. * math/libm-test.inc (log2_test_data): Add sNaN tests.
2016-06-09Fix ldbl-128ibm log1pl (sNaN) (bug 20234).Joseph Myers
The ldbl-128ibm version of log1pl returns sNaN for sNaN input. This patch fixes it to add such inputs to themselves so that qNaN is returned in this case. Tested for powerpc. [BZ #20234] * sysdeps/ieee754/ldbl-128ibm/s_log1pl.c (__log1pl): Add positive infinity or NaN input to itself.
2016-06-09Fix ldbl-128ibm expm1l (sNaN) (bug 20233).Joseph Myers
The ldbl-128ibm version of expm1l returns sNaN for sNaN input. This patch fixes it to add such inputs to themselves so that qNaN is returned in this case. Tested for powerpc. [BZ #20233] * sysdeps/ieee754/ldbl-128ibm/s_expm1l.c (__expm1l): Add NaN input to itself.
2016-06-09Fix ldbl-128 expm1l (sNaN) (bug 20232).Joseph Myers
The ldbl-128 version of expm1l returns sNaN for sNaN input. This patch fixes it to add such inputs to themselves so that qNaN is returned in this case. Tested for mips64. [BZ #20232] * sysdeps/ieee754/ldbl-128/s_expm1l.c (__expm1l): Add NaN input to itself.
2016-06-09Always indirect branch to __libc_start_main via GOTH.J. Lu
Since __libc_start_main in libc.so is called very early, lazy binding isn't relevant. Always call __libc_start_main with indirect branch via GOT to avoid extra branch to PLT slot. In case of static executable, ld in binutils 2.26 or above can convert indirect branch into direct branch: 0000000000400a80 <_start>: 400a80: 31 ed xor %ebp,%ebp 400a82: 49 89 d1 mov %rdx,%r9 400a85: 5e pop %rsi 400a86: 48 89 e2 mov %rsp,%rdx 400a89: 48 83 e4 f0 and $0xfffffffffffffff0,%rsp 400a8d: 50 push %rax 400a8e: 54 push %rsp 400a8f: 49 c7 c0 20 1b 40 00 mov $0x401b20,%r8 400a96: 48 c7 c1 90 1a 40 00 mov $0x401a90,%rcx 400a9d: 48 c7 c7 c0 03 40 00 mov $0x4003c0,%rdi 400aa4: 67 e8 96 09 00 00 addr32 callq 401440 <__libc_start_main> 400aaa: f4 hlt * sysdeps/x86_64/start.S (_start): Always indirect branch to __libc_start_main via GOT.
2016-06-09X86-64: Add dummy memcopy.h and wordcopy.cH.J. Lu
Since x86-64 no longer uses memory copy functions, add dummy memcopy.h and wordcopy.c to reduce code size. It reduces the size of libc.so by about 1 KB. * sysdeps/x86_64/memcopy.h: New file. * sysdeps/x86_64/wordcopy.c: Likewise.
2016-06-08Fix i386/x86_64 log1pl (sNaN) (bug 20229).Joseph Myers
The i386/x86_64 versions of log1pl return sNaN for sNaN input. This patch fixes them to add a NaN input to itself so that qNaN is returned in this case. Tested for x86_64 and x86. [BZ #20229] * sysdeps/i386/fpu/s_log1pl.S (__log1pl): Add NaN input to itself. * sysdeps/x86_64/fpu/s_log1pl.S (__log1pl): Likewise. * math/libm-test.inc (log1p_test_data): Add sNaN tests.
2016-06-08Fix i386/x86_64 log10l (sNaN) (bug 20228).Joseph Myers
The i386/x86_64 versions of log10l return sNaN for sNaN input. This patch fixes them to add a NaN input to itself so that qNaN is returned in this case. Tested for x86_64 and x86. [BZ #20228] * sysdeps/i386/fpu/e_log10l.S (__ieee754_log10l): Add NaN input to itself. * sysdeps/x86_64/fpu/e_log10l.S (__ieee754_log10l): Likewise. * math/libm-test.inc (log10_test_data): Add sNaN tests.
2016-06-08Fix i386/x86_64 logl (sNaN) (bug 20227).Joseph Myers
The i386/x86_64 versions of logl return sNaN for sNaN input. This patch fixes them to add a NaN input to itself so that qNaN is returned in this case. Tested for x86_64 and x86 (including a build for i586 to cover the non-i686 logl version). [BZ #20227] * sysdeps/i386/fpu/e_logl.S (__ieee754_logl): Add NaN input to itself. * sysdeps/i386/i686/fpu/e_logl.S (__ieee754_logl): Likewise. * sysdeps/x86_64/fpu/e_logl.S (__ieee754_logl): Likewise. * math/libm-test.inc (log_test_data): Add sNaN tests.
2016-06-08Fix i386/x86_64 expl, exp10l, expm1l for sNaN input (bug 20226).Joseph Myers
The i386 and x86_64 implementations of expl, exp10l and expm1l (code shared between the functions) return sNaN for sNaN input. This patch fixes them to add NaN inputs to themselves so that qNaN is returned in this case. Tested for x86_64 and x86. [BZ #20226] * sysdeps/i386/fpu/e_expl.S (IEEE754_EXPL): Add NaN argument to itself. * sysdeps/x86_64/fpu/e_expl.S (IEEE754_EXPL): Likewise. * math/libm-test.inc (exp_test_data): Add sNaN tests. (exp10_test_data): Likewise. (expm1_test_data): Likewise.
2016-06-08Fix i386 cbrtl (sNaN) (bug 20224).Joseph Myers
The i386 version of cbrtl returns sNaN (without raising any exceptions) for sNaN input. This patch fixes it to add non-finite arguments to themselves (the code path in question is also reached for zero arguments, for which adding them to themselves is also harmless), so that "invalid" is raised and qNaN returned. Tested for x86_64 and x86. [BZ #20224] * sysdeps/i386/fpu/s_cbrtl.S (__cbrtl): Add non-finite or zero argument to itself. * math/libm-test.inc (cbrt_test_data): Add sNaN tests.
2016-06-08X86-64: Remove previous default/SSE2/AVX2 memcpy/memmoveH.J. Lu
Since the new SSE2/AVX2 memcpy/memmove are faster than the previous ones, we can remove the previous SSE2/AVX2 memcpy/memmove and replace them with the new ones. No change in IFUNC selection if SSE2 and AVX2 memcpy/memmove weren't used before. If SSE2 or AVX2 memcpy/memmove were used, the new SSE2 or AVX2 memcpy/memmove optimized with Enhanced REP MOVSB will be used for processors with ERMS. The new AVX512 memcpy/memmove will be used for processors with AVX512 which prefer vzeroupper. Since the new SSE2 memcpy/memmove are faster than the previous default memcpy/memmove used in libc.a and ld.so, we also remove the previous default memcpy/memmove and make them the default memcpy/memmove, except that non-temporal store isn't used in ld.so. Together, it reduces the size of libc.so by about 6 KB and the size of ld.so by about 2 KB. [BZ #19776] * sysdeps/x86_64/memcpy.S: Make it dummy. * sysdeps/x86_64/mempcpy.S: Likewise. * sysdeps/x86_64/memmove.S: New file. * sysdeps/x86_64/memmove_chk.S: Likewise. * sysdeps/x86_64/multiarch/memmove.S: Likewise. * sysdeps/x86_64/multiarch/memmove_chk.S: Likewise. * sysdeps/x86_64/memmove.c: Removed. * sysdeps/x86_64/multiarch/memcpy-avx-unaligned.S: Likewise. * sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S: Likewise. * sysdeps/x86_64/multiarch/memmove-avx-unaligned.S: Likewise. * sysdeps/x86_64/multiarch/memmove-sse2-unaligned-erms.S: Likewise. * sysdeps/x86_64/multiarch/memmove.c: Likewise. * sysdeps/x86_64/multiarch/memmove_chk.c: Likewise. * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Remove memcpy-sse2-unaligned, memmove-avx-unaligned, memcpy-avx-unaligned and memmove-sse2-unaligned-erms. * sysdeps/x86_64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Replace __memmove_chk_avx512_unaligned_2 with __memmove_chk_avx512_unaligned. Remove __memmove_chk_avx_unaligned_2. Replace __memmove_chk_sse2_unaligned_2 with __memmove_chk_sse2_unaligned. Remove __memmove_chk_sse2 and __memmove_avx_unaligned_2. Replace __memmove_avx512_unaligned_2 with __memmove_avx512_unaligned. Replace __memmove_sse2_unaligned_2 with __memmove_sse2_unaligned. Remove __memmove_sse2. Replace __memcpy_chk_avx512_unaligned_2 with __memcpy_chk_avx512_unaligned. Remove __memcpy_chk_avx_unaligned_2. Replace __memcpy_chk_sse2_unaligned_2 with __memcpy_chk_sse2_unaligned. Remove __memcpy_chk_sse2. Remove __memcpy_avx_unaligned_2. Replace __memcpy_avx512_unaligned_2 with __memcpy_avx512_unaligned. Remove __memcpy_sse2_unaligned_2 and __memcpy_sse2. Replace __mempcpy_chk_avx512_unaligned_2 with __mempcpy_chk_avx512_unaligned. Remove __mempcpy_chk_avx_unaligned_2. Replace __mempcpy_chk_sse2_unaligned_2 with __mempcpy_chk_sse2_unaligned. Remove __mempcpy_chk_sse2. Replace __mempcpy_avx512_unaligned_2 with __mempcpy_avx512_unaligned. Remove __mempcpy_avx_unaligned_2. Replace __mempcpy_sse2_unaligned_2 with __mempcpy_sse2_unaligned. Remove __mempcpy_sse2. * sysdeps/x86_64/multiarch/memcpy.S (__new_memcpy): Support __memcpy_avx512_unaligned_erms and __memcpy_avx512_unaligned. Use __memcpy_avx_unaligned_erms and __memcpy_sse2_unaligned_erms if processor has ERMS. Default to __memcpy_sse2_unaligned. (ENTRY): Removed. (END): Likewise. (ENTRY_CHK): Likewise. (libc_hidden_builtin_def): Likewise. Don't include ../memcpy.S. * sysdeps/x86_64/multiarch/memcpy_chk.S (__memcpy_chk): Support __memcpy_chk_avx512_unaligned_erms and __memcpy_chk_avx512_unaligned. Use __memcpy_chk_avx_unaligned_erms and __memcpy_chk_sse2_unaligned_erms if if processor has ERMS. Default to __memcpy_chk_sse2_unaligned. * sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S Change function suffix from unaligned_2 to unaligned. * sysdeps/x86_64/multiarch/mempcpy.S (__mempcpy): Support __mempcpy_avx512_unaligned_erms and __mempcpy_avx512_unaligned. Use __mempcpy_avx_unaligned_erms and __mempcpy_sse2_unaligned_erms if processor has ERMS. Default to __mempcpy_sse2_unaligned. (ENTRY): Removed. (END): Likewise. (ENTRY_CHK): Likewise. (libc_hidden_builtin_def): Likewise. Don't include ../mempcpy.S. (mempcpy): New. Add a weak alias. * sysdeps/x86_64/multiarch/mempcpy_chk.S (__mempcpy_chk): Support __mempcpy_chk_avx512_unaligned_erms and __mempcpy_chk_avx512_unaligned. Use __mempcpy_chk_avx_unaligned_erms and __mempcpy_chk_sse2_unaligned_erms if if processor has ERMS. Default to __mempcpy_chk_sse2_unaligned.
2016-06-08X86-64: Remove the previous SSE2/AVX2 memsetsH.J. Lu
Since the new SSE2/AVX2 memsets are faster than the previous ones, we can remove the previous SSE2/AVX2 memsets and replace them with the new ones. This reduces the size of libc.so by about 900 bytes. No change in IFUNC selection if SSE2 and AVX2 memsets weren't used before. If SSE2 or AVX2 memset was used, the new SSE2 or AVX2 memset optimized with Enhanced REP STOSB will be used for processors with ERMS. The new AVX512 memset will be used for processors with AVX512 which prefer vzeroupper. [BZ #19881] * sysdeps/x86_64/multiarch/memset-sse2-unaligned-erms.S: Folded into ... * sysdeps/x86_64/memset.S: This. (__bzero): Removed. (__memset_tail): Likewise. (__memset_chk): Likewise. (memset): Likewise. (MEMSET_CHK_SYMBOL): New. Define only if MEMSET_SYMBOL isn't defined. (MEMSET_SYMBOL): Define only if MEMSET_SYMBOL isn't defined. * sysdeps/x86_64/multiarch/memset-avx2.S: Removed. (__memset_zero_constant_len_parameter): Check SHARED instead of PIC. * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Remove memset-avx2 and memset-sse2-unaligned-erms. * sysdeps/x86_64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Remove __memset_chk_sse2, __memset_chk_avx2, __memset_sse2 and __memset_avx2_unaligned. * sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S (__bzero): Enabled. * sysdeps/x86_64/multiarch/memset.S (memset): Replace __memset_sse2 and __memset_avx2 with __memset_sse2_unaligned and __memset_avx2_unaligned. Use __memset_sse2_unaligned_erms or __memset_avx2_unaligned_erms if processor has ERMS. Support __memset_avx512_unaligned_erms and __memset_avx512_unaligned. (memset): Removed. (__memset_chk): Likewise. (MEMSET_SYMBOL): New. (libc_hidden_builtin_def): Replace __memset_sse2 with __memset_sse2_unaligned. * sysdeps/x86_64/multiarch/memset_chk.S (__memset_chk): Replace __memset_chk_sse2 and __memset_chk_avx2 with __memset_chk_sse2_unaligned and __memset_chk_avx2_unaligned_erms. Use __memset_chk_sse2_unaligned_erms or __memset_chk_avx2_unaligned_erms if processor has ERMS. Support __memset_chk_avx512_unaligned_erms and __memset_chk_avx512_unaligned.
2016-06-07Fix i386 atanhl (sNaN) (bug 20219).Joseph Myers
The i386 version of atanhl returns sNaN for sNaN input. This patch fixes it to add NaN arguments to themselves so it returns qNaN in this case. Tested for x86_64 and x86. [BZ #20219] * sysdeps/i386/fpu/e_atanhl.S (__ieee754_atanhl): Add NaN argument to itself. * math/libm-test.inc (atanh_test_data): Add sNaN tests.
2016-06-07Fix i386 asinhl (sNaN) (bug 20218).Joseph Myers
The i386 version of asinhl returns sNaN (without raising any exceptions) for sNaN input. This patch fixes it to add non-finite arguments to themselves, so that "invalid" is raised and qNaN returned. Tested for x86_64 and x86. [BZ #20218] * sysdeps/i386/fpu/s_asinhl.S (__asinhl): Add non-finite argument to itself. * math/libm-test.inc (asinh_test_data): Add sNaN tests.
2016-06-07Check FMA after COMMON_CPUID_INDEX_80000001H.J. Lu
Since the FMA4 bit is in COMMON_CPUID_INDEX_80000001 and FMA4 requires AVX, determine if FMA4 is usable after COMMON_CPUID_INDEX_80000001 is available and if AVX is usable. [BZ #20195] * sysdeps/x86/cpu-features.c (get_common_indeces): Move FMA4 check to ... (init_cpu_features): Here.
2016-06-07Bug 20214: Fix linux/in6.h and netinet/in.h sync.Carlos O'Donell
In: https://sourceware.org/glibc/wiki/Synchronizing_Headers we explain how we synchronize our headers with Linux kernel headers. In order to synchronize with the Linux linux/in6.h and linux/ipv6.h headers we checked for their guard macros and then defined __USE_KERNEL_IPV6_DEFS and conditionalized code on this macro. In upstream kernel 56c176c9 the _UAPI prefix was stripped and this broke our synchronized headers again. We now need to check for _LINUX_IN6_H and _IPV6_H, and keep checking the old versions of the header guard checks for maximum backwards compatibility with older Linux headers (the history is actually a bit muddled here and it appears upstream linus kernel broke this 10 months *before* our fix was ever applied to glibc, but without glibc testing we didn't notice and distro kernels have their own testing to fix this). This patch fixes synchronization with linux/in6.h and with netinet/in.h.
2016-06-06Bug 20198: quick_exit should not call destructors.Carlos O'Donell
In C++11 18.5.12 says "Objects shall not be destroyed as a result of calling quick_exit." In C11 quick_exit is silent about thread object destruction. Therefore to make glibc C++ compliant we do not call any thread local destructors. A new regression test verifies the fix. I will note that C++11 18.5.3 makes it clear that C++ defines additional requirements for _Exit() to prevent it from executing destructors. Given that the point of _Exit() is to terminate the process immediately it makes sense the C and C++ should line up and avoid calling destructors. No failures. New regtest passes.
2016-06-06Fix a typo in comments in memmove-vec-unaligned-erms.SH.J. Lu
* sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S: Fix a typo in comments.
2016-06-06Fix dbl-64 asin (sNaN) (bug 20213).Joseph Myers
The dbl-64 version of asin returns sNaN for sNaN arguments. This patch fixes it to add NaN arguments to themselves so that qNaN is returned in this case. Tested for x86_64 and x86. [BZ #20213] * sysdeps/ieee754/dbl-64/e_asin.c (__ieee754_asin): Add NaN argument to itself. * math/libm-test.inc (asin_test_data): Add sNaN tests.
2016-06-06Consolidate pwritev/pwritev64 implementationsAdhemerval Zanella
This patch consolidates all the pwritev{64} implementation for Linux in only one (sysdeps/unix/sysv/linux/pwritev{64}.c). It also removes the syscall from the auto-generation using assembly macros. It was based on previous pwrite/pwrite64 consolidation patch. The new macro SYSCALL_LL{64} is used to handle the offset argument and alias is created for __ASSUME_OFF_DIFF_OFF64 in case of pread64. Checked on x86_64, i386, aarch64, and powerpc64le. * misc/Makefile (CFLAGS-pwritev.c): New variable: add cancellation required flags. (CFLAGS-pwritev64.c): Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/pwritev.c: Remove file. * sysdeps/unix/sysv/linux/generic/wordsize-32/pwritev64.c: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n64/pwritev64.c: Likewise. * sysdeps/unix/sysv/linux/wordsize-64/pwritev.c: Likewise. * sysdeps/unix/sysv/linux/wordsize-64/pwritev64.: Likwise. * sysdeps/unix/sysv/linux/x86_64/x32/syscalls.list (pwritev): Remove syscall from auto-generation. * sysdeps/unix/sysv/linux/pwritev.c: Rewrite implementation. [WORDSIZE == 64] (pwritev64): Remove macro. [!PWRITEV] (PWRITEV): Likewise. [!PWRITEV] (PWRITEV_REPLACEMENT): Likewise. [!PWRITEV] (PWRITE): Likewise. [!PWRITEV] (OFF_T): Likewise. [!__ASSUME_PWRITEV] (PWRITEV_REPLACEMENT): Likewise. (LO_HI_LONG): Remove macro. [__WORDSIZE != 64 || __ASSUME_OFF_DIFF_OFF64] (pwritev): Add function. * sysdeps/unix/sysv/linux/pwritev64.c: Rewrite implementation. (PWRITEV): Remove macro. (PWRITEV_REPLACEMENTE): Likewise. (PWRITE): Likewise. (OFF_T): Likewise. (pwritev64): New function. * nptl/tst-cancel4.c (tf_writev): Add test.
2016-06-06Consolidate preadv/preadv64 implementationAdhemerval Zanella
This patch consolidates all the preadv{64} implementation for Linux in only one (sysdeps/unix/sysv/linux/preadv{64}.c). It also removes the syscall from the auto-generation using assembly macros. It was based on previous pread/pread64 consolidation patch. The new macro SYSCALL_LL{64} is used to handle the offset argument and alias is created for __ASSUME_OFF_DIFF_OFF64 in case of pread64. Checked on x86_64, i386, aarch64, and powerpc64le. * misc/Makefile (CFLAGS-preadv.c): New variable: add cancellation required flags. (CFLAGS-preadv64.c): Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/preadv.c: Remove file. * sysdeps/unix/sysv/linux/generic/wordsize-32/preadv64.c: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n64/preadv64.c: Likewise. * sysdeps/unix/sysv/linux/wordsize-64/preadv.c: Likewise. * sysdeps/unix/sysv/linux/wordsize-64/preadv64.: Likwise. * sysdeps/unix/sysv/linux/x86_64/x32/syscalls.list (preadv): Remove syscall from auto-generation. * sysdeps/unix/sysv/linux/preadv.c: Rewrite implementation. [WORDSIZE == 64] (preadv64): Remove macro. [!PREADV] (PREADV): Likewise. [!PREADV] (PREADV_REPLACEMENT): Likewise. [!PREADV] (PREAD): Likewise. [!PREADV] (OFF_T): Likewise. [!__ASSUME_PREADV] (PREADV_REPLACEMENT): Likewise. (LO_HI_LONG): Remove macro. [__WORDSIZE != 64 || __ASSUME_OFF_DIFF_OFF64] (preadv): Add function. * sysdeps/unix/sysv/linux/preadv64.c: Rewrite implementation. (PREADV): Remove macro. (PREADV_REPLACEMENTE): Likewise. (PREAD): Likewise. (OFF_T): Likewise. (preadv64): New function. * nptl/tst-cancel4.c (tf_preadv): Add test.
2016-06-06Fix dbl-64 acos (sNaN) (bug 20212).Joseph Myers
The dbl-64 version of acos returns sNaN for sNaN arguments. This patch fixes it to add NaN arguments to themselves so that qNaN is returned in this case. Tested for x86_64 and x86. [BZ #20212] * sysdeps/ieee754/dbl-64/e_asin.c (__ieee754_acos): Add NaN argument to itself. * math/libm-test.inc (acos_test_data): Add sNaN tests.
2016-06-06powerpc: Fix --disable-multi-arch build on POWER8Tulio Magno Quites Machado Filho
Add missing symbols of stpncpy and strcasestr when multi-arch is disabled. Fix memset call from strncpy/stpncpy when multi-arch is disabled.
2016-06-03Fix x86/x86_64 nextafterl incrementing negative subnormals (bug 20205).Joseph Myers
The x86 / x86_64 implementation of nextafterl (also used for nexttowardl) produces incorrect results (NaNs) when negative subnormals, the low 32 bits of whose mantissa are zero, are incremented towards zero. This patch fixes this by disabling the logic to decrement the exponent in that case. Tested for x86_64 and x86. [BZ #20205] * sysdeps/i386/fpu/s_nextafterl.c (__nextafterl): Do not adjust exponent when incrementing negative subnormal with low mantissa word zero. * math/libm-test.inc (nextafter_test_data) [TEST_COND_intel96]: Add another test.
2016-06-02Fix macro API for __USE_KERNEL_IPV6_DEFS.Carlos O'Donell
The use of __USE_KERNEL_IPV6_DEFS with ifndef is bad practice per: https://sourceware.org/glibc/wiki/Wundef. This change moves it to use 'if' and always define the macro. Please note that this is not the only problem with this code. I have a series of fixes after this one to resolve breakage with this code and add regression tests for it via compile-only source testing (to be discussed in another thread). Unfortunately __USE_KERNEL_XATTR_DEFS is set by the kernel and not glibc, and uses 'define', so we can't fix that yet.
2016-05-30hurd: disable ifunc for nowSamuel Thibault
* sysdeps/mach/hurd/configure.ac (libc_cv_ld_gnu_indirect_function): Set to no. * sysdeps/mach/hurd/configure: Refresh.
2016-05-30posix: Call _exit in failure case for posix_spawn{p} (BZ#20178)Adhemerval Zanella
This patch call _exit instead of exit in failure case for the spawned child in Linux posix_spawn{p} implementation. Tested on x86_64. [BZ #20178] * sysdeps/unix/sysv/linux/spawni.c (__spawni_child): Call _exit on failure instead of exit.
2016-05-30hurd: fix _hurd_self_sigstate reference from ____longjmp_chkSamuel Thibault
* sysdeps/mach/hurd/i386/____longjmp_chk.S (____longjmp_chk) [PIC]: Use PLT entry for calling _hurd_self_sigstate.
2016-05-27Count number of logical processors sharing L2 cacheH.J. Lu
For Intel processors, when there are both L2 and L3 caches, SMT level type should be ued to count number of available logical processors sharing L2 cache. If there is only L2 cache, core level type should be used to count number of available logical processors sharing L2 cache. Number of available logical processors sharing L2 cache should be used for non-inclusive L2 and L3 caches. * sysdeps/x86/cacheinfo.c (init_cacheinfo): Count number of available logical processors with SMT level type sharing L2 cache for Intel processors.
2016-05-27Fix powerpc64 ceil, rint etc. on sNaN input (bug 20160).Joseph Myers
The powerpc64 versions of ceil, floor, round, trunc, rint, nearbyint and their float versions return sNaN for sNaN input when they should return qNaN. This patch fixes them to add a NaN argument to itself to quiet sNaNs before returning. Tested for powerpc64. [BZ #20160] * sysdeps/powerpc/powerpc64/fpu/s_ceil.S (__ceil): Add NaN argument to itself before returning the result. * sysdeps/powerpc/powerpc64/fpu/s_ceilf.S (__ceilf): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_floor.S (__floor): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_floorf.S (__floorf): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_nearbyint.S (__nearbyint): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_nearbyintf.S (__nearbyintf): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_rint.S (__rint): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_rintf.S (__rintf): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_round.S (__round): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_roundf.S (__roundf): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_trunc.S (__trunc): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_truncf.S (__truncf): Likewise.
2016-05-27Fix powerpc32 ceil, rint etc. on sNaN input (bug 20160).Joseph Myers
The powerpc32 versions of ceil, floor, round, trunc, rint, nearbyint and their float versions return sNaN for sNaN input when they should return qNaN. This patch fixes them to add a NaN argument to itself to quiet sNaNs before returning. The powerpc64 versions, which have the same bug, will be addressed separately. Tested for powerpc32. [BZ #20160] * sysdeps/powerpc/powerpc32/fpu/s_ceil.S (__ceil): Add NaN argument to itself before returning the result. * sysdeps/powerpc/powerpc32/fpu/s_ceilf.S (__ceilf): Likewise. * sysdeps/powerpc/powerpc32/fpu/s_floor.S (__floor): Likewise. * sysdeps/powerpc/powerpc32/fpu/s_floorf.S (__floorf): Likewise. * sysdeps/powerpc/powerpc32/fpu/s_nearbyint.S (__nearbyint): Likewise. * sysdeps/powerpc/powerpc32/fpu/s_nearbyintf.S (__nearbyintf): Likewise. * sysdeps/powerpc/powerpc32/fpu/s_rint.S (__rint): Likewise. * sysdeps/powerpc/powerpc32/fpu/s_rintf.S (__rintf): Likewise. * sysdeps/powerpc/powerpc32/fpu/s_round.S (__round): Likewise. * sysdeps/powerpc/powerpc32/fpu/s_roundf.S (__roundf): Likewise. * sysdeps/powerpc/powerpc32/fpu/s_trunc.S (__trunc): Likewise. * sysdeps/powerpc/powerpc32/fpu/s_truncf.S (__truncf): Likewise.
2016-05-27Avoid "invalid" exceptions from powerpc fabsl (sNaN) (bug 20157).Joseph Myers
The powerpc implementations of fabsl for ldbl-128ibm (both powerpc32 and powerpc64) wrongly raise the "invalid" exception for sNaN arguments. fabs functions should be quiet for all inputs including signaling NaNs. The problem is the use of a comparison instruction fcmpu to determine if the high part of the argument is negative and so the low part needs to be negated; such instructions raise "invalid" for sNaNs. There is a pure integer implementation of fabsl in sysdeps/ieee754/ldbl-128ibm/s_fabsl.c. However, it's not necessary to use it to avoid such exceptions. The fsel instruction does not raise exceptions for sNaNs, and can be used in place of the original comparison. (Note that if the high part is zero or a NaN, it does not matter whether the low part is negated; the choice of whether the low part of a zero is +0 or -0 does not affect the value, and the low part of a NaN does not affect the value / payload either.) The condition in GCC for fsel to be available is TARGET_PPC_GFXOPT, corresponding to the _ARCH_PPCGR predefined macro. fsel is available on all 64-bit processors supported by GCC. A few 32-bit processors supported by GCC do not have TARGET_PPC_GFXOPT despite having hard float support. To support those processors, integer code (similar to that in copysignl) is included for the !_ARCH_PPCGR case for powerpc32. Tested for powerpc32 (configurations with and without _ARCH_PPCGR) and powerpc64. [BZ #20157] * sysdeps/powerpc/powerpc32/fpu/s_fabsl.S (__fabsl): Use fsel to determine whether to negate low half if [_ARCH_PPCGR], and integer comparison otherwise. * sysdeps/powerpc/powerpc64/fpu/s_fabsl.S (__fabsl): Use fsel to determine whether to negate low half.
2016-05-27Fix ldbl-128ibm ceill, rintl etc. for sNaN arguments (bug 20156).Joseph Myers
The ldbl-128ibm implementations of ceill, floorl, roundl, truncl, rintl and nearbyintl wrongly return an sNaN when given an sNaN argument. This patch fixes them to add such an argument to itself to turn it into a quiet NaN. (The code structure means this "else" case applies to any argument which is zero or not finite; it's OK to do this in all such cases.) Tested for powerpc. [BZ #20156] * sysdeps/ieee754/ldbl-128ibm/s_ceill.c (__ceill): Add high part to itself when zero or not finite. * sysdeps/ieee754/ldbl-128ibm/s_floorl.c (__floorl): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_rintl.c (__rintl): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_roundl.c (__roundl): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_truncl.c (__truncl): Likewise.
2016-05-26Fix ldbl-128ibm sqrtl (sNaN) (bug 20153).Joseph Myers
The ldbl-128ibm implementation of sqrtl wrongly returns an sNaN for signaling NaN arguments. This patch fixes it to quiet its argument, using the same x * x + x return for infinities and NaNs as the dbl-64 implementation uses to ensure that +Inf maps to +Inf while -Inf and NaN map to NaN. Tested for powerpc. [BZ #20153] * sysdeps/ieee754/ldbl-128ibm/e_sqrtl.c (__ieee754_sqrtl): Return x * x + x for infinities and NaNs.
2016-05-26Fix ldbl-128 j0l, j1l, y0l, y1l for sNaN argument (bug 20151).Joseph Myers
The ldbl-128 implementations of j0l, j1l, y0l, y1l (also used for ldbl-128ibm) return an sNaN argument unchanged. This patch fixes them to add a NaN argument to itself to quiet it before return. Tested for mips64. [BZ #20151] * sysdeps/ieee754/ldbl-128/e_j0l.c (__ieee754_j0l): Add NaN argument to itself before returning result. (__ieee754_y0l): Likewise. * sysdeps/ieee754/ldbl-128/e_j1l.c (__ieee754_j1l): Likewise. (__ieee754_y1l).
2016-05-26network: Fix missing bits from {recv,send}{m}msg standard com,plianceAdhemerval Zanella
This patch fixes wrong/missing bits from the Fix {recv,send}{m}msg standard compliance (BZ#16919) patches: * nptl/Makefile sets CFLAGS-oldrecvfrom.c, but there's no such file as oldrecvfrom.c. It should be oldsendmsg.c as defined by ChangeLog. * sysdeps/unix/sysv/linux/hppa/Versions and sysdeps/unix/sysv/linux/i386/Versions list a symbol recvms instead of recvmsg at version GLIBC_2.24. * nptl/Makefile (CFLAGS-oldrecvfrom.c): Remove rule. (CFLAGS-oldsendmsg.c): Add rule. * sysdeps/unix/sysv/linux/hppa/Versions [libc] (GLIBC_2.24): Correct recvmsg symbol name. * sysdeps/unix/sysv/linux/i386/Versions [libc] (GLIBC_2.24): Likewise.
2016-05-25network: recvmmsg and sendmmsg standard compliance (BZ#16919)Adhemerval Zanella
POSIX specifies that both msghdr::msg_iovlen and msghdr::msg_controllen to be of size int and socklen_t respectively, however Linux implements it as a size_t. So for 64-bits architecture where sizeof of size_t is larger than socklen_t, both sendmmsg and recvmmsg need to adjust the mmsghdr::msg_hdr internal fields before issuing the syscall itself. This patch fixes it by operating on the padding if it the case. For recvmmsg, the most straightfoward case, only zero padding the fields is suffice. However, for sendmmsg, where adjusting the buffer is out of the contract (since it may point to a read-only data), the function is rewritten to use sendmsg instead (which from previous patch allocates a temporary msghdr to operate on). Also for 64-bit ports that requires it, a new recvmmsg and sendmmsg compat version is created (which uses size_t for both cmsghdr::cmsg_len and internal Tested on x86_64, i686, aarch64, armhf, and powerpc64le. * sysdeps/unix/sysv/linux/Makefile [$(subdir) = socket] (sysdep_routines): Add oldrecvmmsg and oldsendmmsg. * sysdeps/unix/sysv/linux/aarch64/libc.abilist: Add recvmmsg and sendmmsg. * sysdeps/unix/sysv/linux/alpha/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist: Likewise. * sysdeps/sysv/linux/powerpc/powerpc64/libc-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/oldrecvmmsg.c: New file. * sysdeps/unix/sysv/linux/oldsendmmsg.c: Likewise. * sysdeps/unix/sysv/linux/recvmmsg.c (__recvmmsg): Adjust msghdr iovlen and controllen fields to adjust to POSIX specification. * sysdeps/unix/sysv/linux/sendmmsg.c (__sendmmsg): Likewise.
2016-05-25network: recvmsg and sendmsg standard compliance (BZ#16919)Adhemerval Zanella
POSIX specifies that both msghdr::msg_iovlen and msghdr::msg_controllen to be of size int and socklen_t respectively. However Linux defines it as both size_t and for 64-bit it requires some adjustments to make the functions standard compliance. This patch fixes it by creating a temporary header and zeroing the pad fields for 64-bits architecture where size of size_t exceeds the size of the int. Also the new recvmsg and sendmsg implementation is only added on libc, with libpthread only containing a compat symbol. Tested on x86_64, i686, aarch64, armhf, and powerpc64le. * conform/data/sys/socket.h-data (msghdr.msg_iovlen): Remove xfail- and change to correct expected type. (msghdr.msg_controllen): Likewise. (cmsghdr.cmsg_len): Likewise. * sysdeps/unix/sysv/linux/bits/socket.h (msghdr.msg_iovlen): Fix expected POSIX assumption about the size. (msghdr.msg_controllen): Likewise. (msghdr.__glibc_reserved1): Likewise. (msghdr.__glibc_reserved2): Likewise. (cmsghdr.cmsg_len): Likewise. (cmsghdr.__glibc_reserved1): Likewise. * nptl/Makefile (libpthread-routines): Remove ptw-recvmsg and ptw-sendmsg. Add ptw-oldrecvmsg and ptw-oldsendmsg. (CFLAGS-sendmsg.c): Remove rule. (CFLAGS-recvmsg.c): Likewise. (CFLAGS-oldsendmsg.c): Add rule. (CFLAGS-oldrecvmsg.c): Likewise. * sysdeps/unix/sysv/linux/alpha/Versions [libc] (GLIBC_2.24): Add recvmsg and sendmsg. * sysdeps/unix/sysv/linux/aarch64/Version [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/arm/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/hppa/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/i386/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/ia64/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/m68k/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/microblaze/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/mips/mips32/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n32/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/nios2/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/powerpc/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/sh/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/sparc/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/Versions [libc] (GLIBC_2.24): Likewise. ( sysdeps/unix/sysv/linux/tile/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/Versions [libc] (GLIBC_2.24): Likewise. ( sysdeps/unix/sysv/linux/x86_64/64/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/x84_64/Versions [libc] (GLIBC_2.24): Likewise. * sysdeps/unix/sysv/linux/Makefile [$(subdir) = socket)] (sysdep_headers): Add oldrecvmsg and oldsendmsg. (CFLAGS-sendmsg.c): Add rule. (CFLAGS-recvmsg.c): Likewise. (CFLAGS-oldsendmsg.c): Likewise. (CFLAGS-oldrecvmsg.c): Likewise. * sysdeps/unix/sysv/linux/check_native.c (__check_native): Fix msghdr initialization. * sysdeps/unix/sysv/linux/check_pf.c (make_request): Likewise. * sysdeps/unix/sysv/linux/ifaddrs.c (__netlink_request): Likewise. * sysdeps/unix/sysv/linux/oldrecvmsg.c: New file. * sysdeps/unix/sysv/linux/oldsendmsg.c: Likewise. * sysdeps/unix/sysv/linux/recvmsg.c (__libc_recvmsg): Adjust msghdr iovlen and controllen fields to adjust to POSIX specification. * sysdeps/unix/sysv/linux/sendmsg.c (__libc_sendmsg): Likewise. * sysdeps/unix/sysv/linux/aarch64/libc.abilist: New version and added recvmsg and sendmsg. * sysdeps/unix/sysv/linux/alpha/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/linux/powerpc/powerpc32/nofpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist: Likewise. * sysdepe/unix/sysv/linux/powerpc/powerpc64/libc.abilist: Likewise. Likewise. 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/sparc/sparc64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist: Likewise. Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise.
2016-05-25Adjust kernel-features.h defaults for recvmsg and sendmsgAdhemerval Zanella
This patch removes the auto-generation for recvmsg and sendmsg syscall and adjust the kernel-features.h for all architectures supported on Linux. This patch follows the idea of 'Adjust kernel-features.h defaults for socket syscalls.' (35ade9f11b9007ee9683529f2d33698ff35255c8) by define __ASSUME_SENDMSG_SYSCALL and __ASSUME_RECVMSG_SYSCALL as supported by default and undefine it for the architecture that do not support it directly. The main rationale is to make is easier add code wrapper over the syscall to fix BZ#16919 (recvmsg standard compliance). Tested on x86_64, i686, aarch64, armhf, and powerpc64le. * sysdeps/unix/sysv/linux/alpha/syscalls.list (recvmsg): Remove from auto-generation. (sendmsg): Likewise. * sysdeps/unix/sysv/linux/arm/syscalls.list (recvmsg): Likewise. (sendmsg): Likewise. * sysdeps/unix/sysv/linux/generic/syscalls.list (recvmsg): Likewise. (sendmsg): Likewise. * sysdeps/unix/sysv/linux/hppa/syscalls.list (recvmsg): Likewise. (sendmsg): Likewise. * sysdeps/unix/sysv/linux/ia64/syscalls.list (recvmsg): Likewise. (sendmsg): Likewise. * sysdeps/unix/sysv/linux/mips/syscalls.list (recvmsg): Likewise. (sendmsg): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list (recvmsg): Likewise. (sendmsg): Likewise. * sysdeps/unix/sysv/linux/x86_64/syscalls.list (recvmsg): Likewise. (sendmsg): Likewise. * sysdeps/unix/sysv/linux/i386/kernel-features.h [__LINUX_KERNEL_VERSION >= 0x040300] (__ASSUME_SENDMSG_SYSCALL): Remove. [__LINUX_KERNEL_VERSION >= 0x040300] (__ASSUME_RECVMSG_SYSCALL): Likewise. [__LINUX_KERNEL_VERSION < 0x040300] (__ASSUME_SENDMSG_SYSCALL): Undefine. [__LINUX_KERNEL_VERSION < 0x040300] (__ASSUME_RECVMSG_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_SENDMSG_SYSCALL): Define. (__ASSUME_RECVMSG_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/m68k/kernel-features.h [__LINUX_KERNEL_VERSION >= 0x040300] (__ASSUME_SENDMSG_SYSCALL): Remove. [__LINUX_KERNEL_VERSION >= 0x040300] (__ASSUME_RECVMSG_SYSCALL): Likewise. [__LINUX_KERNEL_VERSION < 0x040300] (__ASSUME_SENDMSG_SYSCALL): Undefine. [__LINUX_KERNEL_VERSION < 0x040300] (__ASSUME_RECVMSG_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/s390/kernel-features.h [__LINUX_KERNEL_VERSION >= 0x040300] (__ASSUME_SENDMSG_SYSCALL): Remove. [__LINUX_KERNEL_VERSION >= 0x040300] (__ASSUME_RECVMSG_SYSCALL): Likewise. [__LINUX_KERNEL_VERSION < 0x040300] (__ASSUME_SENDMSG_SYSCALL): Undefine. [__LINUX_KERNEL_VERSION < 0x040300] (__ASSUME_RECVMSG_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/microblaze/kernel-features.h (__ASSUME_SENDMSG_SYSCALL): Undefine. (__ASSUME_RECVMSG_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/powerpc/kernel-features.h (__ASSUME_SENDMSG_SYSCALL): Likewise. (__ASSUME_RECVMSG_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/sh/kernel-features.h (__ASSUME_SENDMSG_SYSCALL): Likewise. (__ASSUME_RECVMSG_SYSCALL): Likewise.
2016-05-25Do not raise "inexact" from powerpc64 ceil, floor, trunc (bug 15479).Joseph Myers
Continuing fixes for ceil, floor and trunc functions not to raise the "inexact" exception, this patch fixes the versions used on older powerpc64 processors. As was done with the round implementations some time ago, the save of floating-point state is moved after the first floating-point operation on the input to ensure that any "invalid" exception from signaling NaN input is included in the saved state, and then the whole state gets restored rather than just the rounding mode. This has no effect on configurations using the power5+ code, since such processors can do these operations with a single instruction (and those instructions do not set "inexact", so are correct for TS 18661-1 semantics). Tested for powerpc64. [BZ #15479] * sysdeps/powerpc/powerpc64/fpu/s_ceil.S (__ceil): Move save of floating-point state after first floating-point operation on input. Restore full floating-point state instead of just rounding mode. * sysdeps/powerpc/powerpc64/fpu/s_ceilf.S (__ceilf): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_floor.S (__floor): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_floorf.S (__floorf): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_trunc.S (__trunc): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_truncf.S (__truncf): Likewise.
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