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* x86: Consolidate NPTL fork.Roland McGrath2014-05-142-0/+54
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* Consolidate not-cancel.h files.Roland McGrath2014-05-144-63/+27
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* Move x86_64 compat-timer.h out of nptl/Roland McGrath2014-05-141-0/+45
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* Move x86_64 timer_*.c out of nptl/Roland McGrath2014-05-146-0/+231
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* x86: Consolidate NPTL/non versions of cloneRoland McGrath2014-05-142-11/+0
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* Move NPTL public ABI headers for x86 to sysdeps/x86/nptl/.Roland McGrath2014-05-144-0/+292
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* x86: Consolidate NPTL/non versions of vforkRoland McGrath2014-05-142-12/+39
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* ARM: Consolidate NPTL/non versions of vforkRoland McGrath2014-05-143-77/+20
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* Fix log1pl (LDBL_MAX) in FE_UPWARD mode (bug 16564).Joseph Myers2014-05-144-4/+20
| | | | | | | | | | | | | | | | | | | | | | | Bug 16564 is spurious overflow of log1pl (LDBL_MAX) in FE_UPWARD mode, resulting from log1pl adding 1 to its argument (for arguments not close to 0), which overflows in that mode. This patch fixes this by avoiding adding 1 to large arguments (precisely what counts as large depends on the floating-point format). Tested x86_64 and x86, and spot-checked log1pl tests on mips64 and powerpc64. [BZ #16564] * sysdeps/i386/fpu/s_log1pl.S (__log1pl): Do not add 1 to positive arguments with exponent 65 or above. * sysdeps/ieee754/ldbl-128/s_log1pl.c (__log1pl): Do not add 1 to arguments 0x1p113L or above. * sysdeps/ieee754/ldbl-128ibm/s_log1pl.c (__log1pl): Do not add 1 to arguments 0x1p107L or above. * sysdeps/x86_64/fpu/s_log1pl.S (__log1pl): Do not add 1 to positive arguments with exponent 65 or above. * math/auto-libm-test-in: Add more tests of log1p. * math/auto-libm-test-out: Regenerated.
* Fix cacos (+Inf + finite*i) in round-downward mode (bug 16928).Joseph Myers2014-05-142-0/+96
| | | | | | | | | | | | | | | | | | | | | According to C99/C11 Annex G, cacos applied to a value with real part +Inf and finite imaginary part should produce a result with real part +0. glibc wrongly produces a result with real part -0 in FE_DOWNWARD mode. This patch fixes this by checking for zero results in the relevant case of non-finite arguments (where there should never be a result with -0 real part), and converts the tests of cacos to ALL_RM_TEST. Tested x86_64 and x86 and ulps updated accordingly. [BZ #16928] * math/s_cacos.c (__cacos): Ensure zero real part of result from non-finite arguments is +0. * math/s_cacosf.c (__cacosf): Likewise. * math/s_cacosl.c (__cacosl): Likewise. * math/libm-test.inc (cacos_test): Use ALL_RM_TEST. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
* Fix acosh (1) in round-downward mode (bug 16927).Joseph Myers2014-05-146-1/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | According to C99 and C11 Annex F, acosh (1) should be +0 in all rounding modes. However, some implementations in glibc wrongly return -0 in round-downward mode (which is what you get if you end up computing log1p (-0), via 1 - 1 being -0 in round-downward mode). This patch fixes the problem implementations, by correcting the test for an exact 1 value in the ldbl-96 implementation to allow for the explicit high bit of the mantissa, and by inserting fabs instructions in the i386 implementations; tests of acosh are duly converted to ALL_RM_TEST. I believe all the other sysdeps/ieee754 implementations are already OK (I haven't checked the ia64 versions, but if buggy then that will be obvious from the results of test runs after this patch is in). Tested x86_64 and x86 and ulps updated accordingly. [BZ #16927] * sysdeps/i386/fpu/e_acosh.S (__ieee754_acosh): Use fabs on x-1 value. * sysdeps/i386/fpu/e_acoshf.S (__ieee754_acoshf): Likewise. * sysdeps/i386/fpu/e_acoshl.S (__ieee754_acoshl): Likewise. * sysdeps/ieee754/ldbl-96/e_acoshl.c (__ieee754_acoshl): Correct for explicit high bit of mantissa when testing for argument equal to 1. * math/libm-test.inc (acosh_test): Use ALL_RM_TEST. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
* Fix erf underflow handling near 0 (bug 16516).Joseph Myers2014-05-145-17/+54
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Bug 16516 reports spurious underflows from erf (for all floating-point types), when the result is close to underflowing but does not actually underflow. erf (x) is about (2/sqrt(pi))*x for x close to 0, so there are subnormal arguments for which it does not underflow. The various implementations do (x + efx*x) (for efx = 2/sqrt(pi) - 1), for greater accuracy than if just using a single multiplication by an approximation to 2/sqrt(pi) (effectively, this way there are a few more bits in the approximation to 2/sqrt(pi)). This can introduce underflows when efx*x underflows even though the final result does not, so a scaled calculation with 8*efx is done in these cases - but 8 is not a big enough scale factor to avoid all such underflows. 16 is (any underflows with a scale factor of 16 would only occur when the final result underflows), so this patch changes the code to use that factor. Rather than recomputing all the values of the efx8 variable, it is removed, leaving it to the compiler's constant folding to compute 16*efx. As such scaling can also lose underflows when the final scaling down happens to be exact, appropriate checks are added to ensure underflow exceptions occur when required in such cases. Tested x86_64 and x86; no ulps updates needed. Also spot-checked for powerpc32 and mips64 to verify the changes to the ldbl-128ibm and ldbl-128 implementations. [BZ #16516] * sysdeps/ieee754/dbl-64/s_erf.c (efx8): Remove variable. (__erf): Scale by 16 instead of 8 in potentially underflowing case. Ensure exception if result actually underflows. * sysdeps/ieee754/flt-32/s_erff.c (efx8): Remove variable. (__erff): Scale by 16 instead of 8 in potentially underflowing case. Ensure exception if result actually underflows. * sysdeps/ieee754/ldbl-128/s_erfl.c: Include <float.h>. (efx8): Remove variable. (__erfl): Scale by 16 instead of 8 in potentially underflowing case. Ensure exception if result actually underflows. * sysdeps/ieee754/ldbl-128ibm/s_erfl.c: Include <float.h>. (efx8): Remove variable. (__erfl): Scale by 16 instead of 8 in potentially underflowing case. Ensure exception if result actually underflows. * sysdeps/ieee754/ldbl-96/s_erfl.c: Include <float.h>. (efx8): Remove variable. (__erfl): Scale by 16 instead of 8 in potentially underflowing case. Ensure exception if result actually underflows. * math/auto-libm-test-in: Add more tests of erf. * math/auto-libm-test-out: Regenerated.
* Fix macro warning on HAVE_PT_CHOWNAndreas Schwab2014-05-141-1/+1
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* Reduce kernel-features.h duplication.Joseph Myers2014-05-1410-129/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch reduces duplication between different architectures' kernel-features.h files by making the architecture-independent file define various macros unconditionally (instead of only for a particular list of architectures), with the architecture-specific files then undefining the macros if necessary. Specifically, __ASSUME_O_CLOEXEC (O_CLOEXEC flag to open) and __ASSUME_SOCK_CLOEXEC (SOCK_NONBLOCK and SOCK_CLOEXEC flags to socket) are supported on all architectures as of 2.6.32 or the minimum kernel version for the architecture if later. For __ASSUME_IN_NONBLOCK, __ASSUME_PIPE2, __ASSUME_EVENTFD2, __ASSUME_SIGNALFD4 and __ASSUME_DUP3, the relevant syscalls were added for alpha in 2.6.33 but otherwise the features are available as of 2.6.32. For __ASSUME_UTIMES, support is everywhere in 2.6.32 except for asm-generic architectures and hppa. Although those were the main cases of duplication among kernel-features.h files, some other cases of unnecessary definitions were also cleaned up: the hppa file defined various macros that were either no longer used at all, or defined by the main file by default anyway, the ia64 file had duplicative definitions of __ASSUME_PSELECT and __ASSUME_PPOLL, while mips had such a definition of __ASSUME_IPC64. Really, rather than being defined in the main file then undefined for asm-generic architectures, __ASSUME_UTIMES should become an hppa-specific macro. Given that __ASSUME_ATFCTS and __ASSUME_UTIMENSAT are now always true, the only live __ASSUME_UTIMES conditional is in sysdeps/unix/sysv/linux/utimes.c, which is not used for asm-generic architectures. I think the desired state would be an hppa-specific file (that includes sysdeps/unix/sysv/linux/utimes.c if __ASSUME_UTIMES, and otherwise has fallback code), with the fallback code being removed from the main utimes.c. But I think that's most reasonably a separate cleanup once __ASSUME_ATFCTS and __ASSUME_UTIMESAT have both had conditional code cleaned up. Given this patch, I think it's straightforward to move non-ex-ports architectures to having their own kernel-features.h files, like ex-ports architectures, rather than conditionals in the main file (i.e., such a move won't require the architecture-specific file to contain anything that isn't genuinely architecture-specific), and would encourage architecture maintainers to do so. Tested x86_64 that the installed shared libraries are unchanged by this patch. Note that on some architectures this *will* cause __ASSUME_* macros to be defined in cases where they weren't previously but should have been (but this is just optimization, not a fix to a user-visible bug, so doesn't need a bug report in Bugzilla). * sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_UTIMES): Define unconditionally. (__ASSUME_O_CLOEXEC): Likewise. (__ASSUME_SOCK_CLOEXEC): Likewise. (__ASSUME_IN_NONBLOCK): Likewise. (__ASSUME_PIPE2): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_DUP3): Likewise. * sysdeps/unix/sysv/linux/aarch64/kernel-features.h (__ASSUME_DUP3): Do not define. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_IN_NONBLOCK): Likewise. (__ASSUME_O_CLOEXEC): Likewise. (__ASSUME_PIPE2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_SOCK_CLOEXEC): Likewise. (__ASSUME_UTIMES): Undefine. * sysdeps/unix/sysv/linux/alpha/kernel-features.h (__ASSUME_UTIMES): Do not define. (__ASSUME_O_CLOEXEC): Likewise. (__ASSUME_SOCK_CLOEXEC): Likewise. (__ASSUME_IN_NONBLOCK): Undefine if [__LINUX_KERNEL_VERSION < 0x020621] instead of defining if [__LINUX_KERNEL_VERSION >= 0x020621]. (__ASSUME_PIPE2): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. [__LINUX_KERNEL_VERSION < 0x020621] (__ASSUME_DUP3): Undefine. * sysdeps/unix/sysv/linux/arm/kernel-features.h (__ASSUME_UTIMES): Do not define. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. * sysdeps/unix/sysv/linux/hppa/kernel-features.h (__ASSUME_32BITUIDS): Likewise. (__ASSUME_TRUNCATE64_SYSCALL): Likewise. (__ASSUME_IPC64): Likewise. (__ASSUME_ST_INO_64_BIT): Likewise. (__ASSUME_GETDENTS64_SYSCALL): Likewise. [__LINUX_KERNEL_VERSION < 0x030e00] (__ASSUME_UTIMES): Undefine. * sysdeps/unix/sysv/linux/ia64/kernel-features.h (__ASSUME_UTIMES): Do not define. (__ASSUME_PSELECT): Likewise. (__ASSUME_PPOLL): Likewise. (__ASSUME_O_CLOEXEC): Likewise. (__ASSUME_SOCK_CLOEXEC): Likewise. (__ASSUME_IN_NONBLOCK): Likewise. (__ASSUME_PIPE2): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_DUP3): Likewise. * sysdeps/unix/sysv/linux/m68k/kernel-features.h (__ASSUME_UTIMES): Likewise. (__ASSUME_O_CLOEXEC): Likewise. (__ASSUME_SOCK_CLOEXEC): Likewise. (__ASSUME_IN_NONBLOCK): Likewise. (__ASSUME_PIPE2): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_DUP3): Likewise. * sysdeps/unix/sysv/linux/microblaze/kernel-features.h (__ASSUME_UTIMES): Likewise. (__ASSUME_O_CLOEXEC): Likewise. (__ASSUME_SOCK_CLOEXEC): Likewise. (__ASSUME_IN_NONBLOCK): Likewise. (__ASSUME_PIPE2): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_DUP3): Likewise. * sysdeps/unix/sysv/linux/mips/kernel-features.h (__ASSUME_IPC64): Likewise. (__ASSUME_UTIMES): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. * sysdeps/unix/sysv/linux/tile/kernel-features.h (__ASSUME_O_CLOEXEC): Likewise. (__ASSUME_SOCK_CLOEXEC): Likewise. (__ASSUME_IN_NONBLOCK): Likewise. (__ASSUME_PIPE2): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_DUP3): Likewise. (__ASSUME_UTIMES): Undefine.
* Clean up ARM old-ABI symbol versioning relics.Joseph Myers2014-05-148-99/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch cleans up some symbol versioning code in the ARM port that exists only as relics of the old-ABI port, which was removed some time ago. The minimum symbol version in the ARM port is GLIBC_2.4 (the version where the EABI port was introduced). Thus, any SHLIB_COMPAT conditionals where the later version is 2.4 or later are obsolete and can be removed. In addition, there is no need to set symbol versions before 2.4 explicitly if the symbols would have a version of 2.4 by default anyway. This includes most of the entries in sysdeps/unix/sysv/linux/arm/Versions: those for GLIBC_2.0 are for libgcc unwind functions that aren't actually in ARM EABI glibc at all, while those for GLIBC_2.2 and GLIBC_2.3.3 are for functions which for the old-ABI port may have had versions different from the architecture-independent default, but where for EABI the default suffices (both the default and the version in that file map to 2.4, so the entries in that file do nothing). The GLIBC_2.1 entries are needed (architecture-specific functions), but it seems less confusing for those to say GLIBC_2.4, as the actual version those symbols in fact have. Various cases in the <fenv.h> functions where a function is defined as __fe* with an fe* versioned alias are cleaned up just to define fe* directly, as done e.g. on AArch64. If in future we actually need an __fe* name for use from C90 functions in libm as discussed recently, of course we can add one on all architectures and make the fe* name into a weak alias for that particular function, but for now the __fe* names aren't needed. In the case of posix_fadvise64, the __posix_fadvise64_l64 name and posix_fadvise64 alias are kept as __posix_fadvise64_l64 is used in posix_fadvise. (For that to be a namespace-clean use, posix_fadvise64 needs to be a *weak* alias not a strong one as at present, but that's an independent preexisting bug.) (There remain references to GLIBC_2_2 in sysdeps/unix/sysv/linux/arm/{msgctl.c,semctl.c,shmctl.c}. As those files are used by alpha which has a genuine 2.2 version for those functions, I think those references need to stay as-is.) Tested that the disassembly of installed shared libraries is unchanged by this patch (though function names shown in disassembly change to no longer have @@GLIBC_2.4, now those functions get versioned only by the version map and not redundantly at assembler time) and that the ABI tests pass. * sysdeps/arm/fclrexcpt.c (__feclearexcept): Rename to feclearexcept. Remove symbol versioning code. * sysdeps/arm/fegetenv.c (__fegetenv): Rename to fegetenv. Remove symbol versioning code. * sysdeps/arm/fesetenv.c (__fesetenv): Rename to fesetenv. Remove symbol versioning code. * sysdeps/arm/feupdateenv.c (__feupdateenv): Rename to feupdateenv. Remove symbol versioning code. * sysdeps/arm/fgetexcptflg.c (__fegetexceptflag): Rename to fegetexceptflag. Remove symbol versioning code. * sysdeps/arm/fsetexcptflg.c (__fesetexceptflag): Rename to fesetexceptflag. Remove symbol versioning code. * sysdeps/unix/sysv/linux/arm/Versions (libc): Remove GLIBC_2.0, GLIBC_2.2 and GLIBC_2.3.3 entries. Change GLIBC_2.1 to GLIBC_2.4. * sysdeps/unix/sysv/linux/arm/posix_fadvise64.c (__posix_fadvise64_l32): Remove prototype. [SHLIB_COMPAT(libc, GLIBC_2_2, GLIBC_2_3_3)]: Remove conditional code.
* Move NPTL public ABI headers for ARM to sysdeps/arm/nptl/.Roland McGrath2014-05-132-0/+0
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* Verbatim NPTL file moves for ARM/Linux.Roland McGrath2014-05-1321-0/+0
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* Consolidate NPTL configury for ARM/Linux.Roland McGrath2014-05-1310-41/+27
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* Consolidate NPTL vs non clone.S for ARM.Roland McGrath2014-05-132-7/+1
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* Clean up __exit_thread.Roland McGrath2014-05-1312-55/+50
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* Fix typo in assertionAndreas Schwab2014-05-131-1/+1
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* Clean up kernel version conditionals for pre-2.6.32 kernels.Joseph Myers2014-05-127-162/+56
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch does some initial cleanup, following the move to 2.6.32 minimum kernel version, by removing __LINUX_KERNEL_VERSION conditionals that are now always-true or always-false. In the case of __ASSUME_ARG_MAX_STACK_BASED, where the conditional used a kernel version that was itself in a macro, the associated sysconf.c code is also cleaned up and __ASSUME_ARG_MAX_STACK_BASED removed completely. Tested x86_64 that disassembly of installed shared libraries is unchanged by the patch. * sysdeps/unix/sysv/linux/kernel-features.h [__s390__] (__ASSUME_UTIMES): Do not condition on kernel version. (__ASSUME_PSELECT): Define unconditionally. (__ASSUME_PPOLL): Likewise. (__ASSUME_ATFCTS): Likewise. (__ASSUME_SET_ROBUST_LIST): Do not condition on kernel version. (__ASSUME_COMPLETE_READV_WRITEV): Define unconditionally. (__ASSUME_FUTEX_LOCK_PI): Do not condition on kernel version. (__ASSUME_UTIMENSAT): Define unconditionally. (__ASSUME_PRIVATE_FUTEX): Likewise. (__ASSUME_FALLOCATE): Likewise. (__ASSUME_O_CLOEXEC): Likewise. (__LINUX_ARG_MAX_STACK_BASED_MIN_KERNEL): Remove. (__ASSUME_ARG_MAX_STACK_BASED): Likewise. (__ASSUME_ADJ_OFFSET_SS_READ): Define unconditionally. (__ASSUME_SOCK_CLOEXEC): Do not condition on kernel version. (__ASSUME_IN_NONBLOCK): Likewise. (__ASSUME_PIPE2): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_DUP3): Likewise. [__x86_64__ || __sparc__] (__ASSUME_ACCEPT4_SYSCALL): Likewise. (__ASSUME_FUTEX_CLOCK_REALTIME): Define unconditionally. (__ASSUME_AT_RANDOM): Likewise. (__ASSUME_PREADV): Likewise. (__ASSUME_PWRITEV): Likewise. (__ASSUME_REQUEUE_PI): Do not condition on kernel version. (__ASSUME_F_GETOWN_EX): Define unconditionally. (__ASSUME_XFS_RESTRICTED_CHOWN): Likewise. * sysdeps/unix/sysv/linux/sysconf.c (__sysconf) [!__ASSUME_ARG_MAX_STACK_BASED]: Remove conditional code. * sysdeps/unix/sysv/linux/alpha/kernel-features.h (__ASSUME_O_CLOEXEC): Define unconditionally. (__ASSUME_PSELECT): Do not undefine conditionally. (__ASSUME_PPOLL): Likewise. (__ASSUME_ATFCTS): Likewise. (__ASSUME_SET_ROBUST_LIST): Likewise. (__ASSUME_UTIMENSAT): Likewise. (__ASSUME_FDATASYNC): Define unconditionally. * sysdeps/unix/sysv/linux/arm/kernel-features.h (__ASSUME_SIGFRAME_V2): Likewise. )__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_PSELECT): Do not undefine conditionally. (__ASSUME_PPOLL): Likewise. * sysdeps/unix/sysv/linux/ia64/kernel-features.h (__ASSUME_PSELECT): Define unconditionally. (__ASSUME_PPOLL): Likewise. (__ASSUME_O_CLOEXEC): Likewise. (__ASSUME_SOCK_CLOEXEC): Likewise. (__ASSUME_IN_NONBLOCK): Likewise. (__ASSUME_PIPE2): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_DUP3): Likewise. * sysdeps/unix/sysv/linux/m68k/kernel-features.h (__ASSUME_O_CLOEXEC): Likewise. (__ASSUME_SOCK_CLOEXEC): Likewise. (__ASSUME_IN_NONBLOCK): Likewise. (__ASSUME_PIPE2): Likewise. (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_DUP3): Likewise. * sysdeps/unix/sysv/linux/mips/kernel-features.h (__ASSUME_EVENTFD2): Likewise. (__ASSUME_SIGNALFD4): Likewise. (__ASSUME_ACCEPT4_SYSCALL): Likewise.
* Make armv7 strcmp assembly compatible with ARM mode and SFI.Roland McGrath2014-05-091-45/+103
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* Silence a missing-noreturn warning for _Unwind_Resume.Roland McGrath2014-05-091-5/+7
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* Include SSE state in i386 fenv_t (bug 16064).Joseph Myers2014-05-095-17/+183
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes bug 16064, i386 fenv_t not including SSE state, using the technique suggested there of storing the state in the existing __eip field of fenv_t to avoid needing to increase the size of fenv_t and add new symbol versions. The included testcase, which previously failed for i386 (but passed for x86_64), illustrates how the previous state was buggy. This patch causes the SSE state to be included *to the extent it is on x86_64*. Where some state should logically be included but isn't for x86_64 (see bug 16068), this patch does not cause it to be included for i386 either. The idea is that any patch fixing that bug should fix it for both x86_64 and i386 at once. Tested i386 and x86_64. (I haven't tested the case of a CPU without SSE2 disabling the test.) [BZ #16064] * sysdeps/i386/fpu/fegetenv.c: Include <unistd.h>, <ldsodefs.h> and <dl-procinfo.h>. (__fegetenv): Save SSE state in envp->__eip if supported. * sysdeps/i386/fpu/feholdexcpt.c (feholdexcept): Save SSE state in envp->__eip if supported. * sysdeps/i386/fpu/fesetenv.c: Include <unistd.h>, <ldsodefs.h> and <dl-procinfo.h>. (__fesetenv): Always set __eip, __cs_selector, __opcode, __data_offset and __data_selector in environment to 0. Set SSE state if supported. * sysdeps/x86/fpu/Makefile [$(subdir) = math] (tests): Add test-fenv-sse. [$(subdir) = math] (CFLAGS-test-fenv-sse.c): Add -msse2 -mfpmath=sse. * sysdeps/x86/fpu/test-fenv-sse.c: New file.
* ARM: Allow auto-detection of linker relro featureWill Newton2014-05-092-0/+16
| | | | | | | | | | | | | | Set values for libc_commonpagesize and libc_relro_required for the ARM port to enable relro by default and suppress a warning at configure time. ChangeLog: 2014-05-09 Will Newton <will.newton@linaro.org> * sysdeps/arm/preconfigure.ac: Set libc_commonpagesize and libc_relro_required for ARM. * sysdeps/arm/preconfigure: Regenerate.
* S/390: Port of lock elision to System/zDominik Vogt2014-05-092-0/+62
| | | | | | | | | | Added support for TX lock elision of pthread mutexes on s390 and s390x. This may improve lock scaling of existing programs on TX capable systems. The lock elision code is only built with --enable-lock-elision=yes and then requires a GCC version supporting the TX builtins. With lock elision default mutexes are elided via __builtin_tbegin, if the cpu supports transactions. By default lock elision is not enabled and the elision code is not built.
* ARM: Add optimized ARMv7 strcmp implementationWill Newton2014-05-091-0/+492
| | | | | | | | | | | | | | | | | | | Add an optimized implementation of strcmp for ARMv7-A cores. This implementation is significantly faster than the current generic C implementation, particularly for strings of 16 bytes and longer. Tested with the glibc string tests for arm-linux-gnueabihf and armeb-linux-gnueabihf. The code was written by ARM, who have agreed to assign the copyright to the FSF for integration into glibc. ChangeLog: 2014-05-09 Will Newton <will.newton@linaro.org> * sysdeps/arm/armv7/strcmp.S: New file. * NEWS: Mention addition of ARMv7 optimized strcmp.
* Some configure-related decrufting.Roland McGrath2014-05-084-16/+0
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* 2014-05-07 Steve Ellcey <sellcey@mips.com>Steve Ellcey2014-05-071-7/+7
| | | | | | | [BZ# 16922] * sysdeps/mips/sys/asm.h (INT_SUB): Fix definition. (LONG_SUB): Ditto. (PTR_SUB): Ditto.
* Fix parsing of getai result from nscd for IPv6-only requestAndreas Schwab2014-05-071-4/+8
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* Move ARM internal unwind.h header to the right sysdeps directory.Roland McGrath2014-05-061-0/+0
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* SPARC: add EFD_SEMAPHORE in <bits/eventfd.h> (BZ #16916)Aurelien Jarno2014-05-071-0/+2
| | | | | EFD_SEMAPHORE has been added in the main <bits/eventfd.h>, but not in the SPARC specific version. Fix that.
* PowerPC: strncpy/stpncpy optimization for PPC64/POWER7Vidya Ranganathan2014-05-0610-1/+593
| | | | | | | | The optimization is achieved by following techniques: > data alignment [gain from aligned memory access on read/write] > POWER7 gains performance with loop unrolling/unwinding [gain by reduction of branch penalty]. > zero padding done by calling optimized memset
* Move rules for Linux-specific pldd program to Linux-specific Makefile.Roland McGrath2014-05-051-0/+4
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* Fix -Wundef issues in generated errlist.c.Roland McGrath2014-05-052-2/+4
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* PowerPC: ifunc improvement for internal callsAdhemerval Zanella2014-05-057-26/+49
| | | | | | | This patch changes de default symbol redirection for internal call of memcpy, memset, memchr, and strlen to the IFUNC resolved ones. The performance improvement is noticeable in algorithms that uses these symbols extensible, like the regex functions.
* Fix -Wundef warning for FEATURE_INDEX_1.Carlos O'Donell2014-05-031-7/+6
| | | | | | | | Define FEATURE_INDEX_1 and FEATURE_INDEX_MAX as macros for use by both assembly and C code. This fixes the -Wundef error for cases where FEATURE_INDEX_1 was not defined but used the correct value of 0 for an undefined macro.
* Fix v9/64-bit strcmp when string ends in multiple zero bytes.David S. Miller2014-05-011-0/+31
| | | | | | | | | | [BZ #16885] * sysdeps/sparc/sparc64/strcmp.S: Fix end comparison handling when multiple zero bytes exist at the end of a string. Reported by Aurelien Jarno <aurelien@aurel32.net> * string/test-strcmp.c (check): Add explicit test for situations where there are multiple zero bytes after the first.
* ARM: Remove lowlevellock.cWill Newton2014-05-011-132/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | lowlevellock.c for arm differs from the generic lowlevellock.c only in insignificant ways, so can be removed. Happily, this fixes BZ 15119 (unnecessary busy loop in __lll_timedlock_wait on arm). The notable differences between the arm and generic implementations are: 1) arm __lll_timedlock_wait has a fast path out if futex has been set to 0 between since the function was called. This seems unlikely to happen very often, so it seems at worst harmless to lose this fast path. 2) Some function in arm's lowlevellock.c set futex to 2 if it was 1. The generic version always sets the futex to 2. As futex can only be 0, 1 or 2 on entry into these functions, the behaviour is equivalent. (If the futex manages to be 0 on entry then we've just lost another unlikely fast path out.) There are no test suite regressions. Note that hppa and sparc also have their own lowlevellock.c. I believe hppa can also be removed, so I'll send a separate patch for that shortly. sparc's seems to be genuinely needed as it uses a different locking structure. Also note that the analysis at https://sourceware.org/ml/libc-ports/2013-02/msg00021.html indicates a further locking performance bug to fix - I've got a partial patch for that which I can submit once I've finished testing. 2014-05-01 Bernard Ogden <bernie.ogden@linaro.org> [BZ #15119] * sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c: Remove file.
* Add round-mode context support to sparc.David S. Miller2014-04-301-0/+64
| | | | | | | | | | | | | | | | | | | | | | | * sysdeps/sparc/fpu/fenv_private.h (HAVE_RM_CTX): Define. (libc_feholdexcept_setround_sparc_ctx): New function. (libc_fesetenv_sparc_ctx): Likewise. (libc_feupdateenv_sparc_ctx): Likewise. (libc_feholdsetround_sparc_ctx): Likewise. (libc_feholdexcept_setround_ctx): Define. (libc_feholdexcept_setroundf_ctx): Likewise. (libc_feholdexcept_setroundl_ctx): Likewise. (libc_fesetenv_ctx): Likewise. (libc_fesetenvf_ctx): Likewise. (libc_fesetenvl_ctx): Likewise. (libc_feupdateenv_ctx): Likewise. (libc_feupdateenvf_ctx): Likewise. (libc_feupdateenvl_ctx): Likewise. (libc_feresetround_ctx): Likewise. (libc_feresetroundf_ctx): Likewise. (libc_feresetroundl_ctx): Likewise. (libc_feholdsetround_ctx): Likewise. (libc_feholdsetroundf_ctx): Likewise. (libc_feholdsetroundl_ctx): Likewise.
* Correct sparc CPP guards for EMT_TAGOVF.David S. Miller2014-04-301-1/+1
| | | | | * sysdeps/unix/sysv/linux/sparc/bits/siginfo.h (EMT_TAGOVF): Protect with __USE_GNU instead of XOPEN cpp guards.
* Fix some sparc -Wundef build warnings.David S. Miller2014-04-301-0/+3
| | | | | * sysdeps/sparc/bits/string.h (_STRING_ARCH_unaligned): Define to 0.
* Fix some sparc conform test failures in siginfo.hDavid S. Miller2014-04-301-0/+2
| | | | | * sysdeps/unix/sysv/linux/sparc/bits/siginfo.h (EMT_TAGOVF): Protect with XOPEN cpp guards.
* ARM: Fix R_ARM_IRELATIVE RELA relocations.Julian Brown2014-04-301-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | This patch fixes what I believe to be a bug in the handling of R_ARM_IRELATIVE RELA relocations. At present, these are handled the same as REL relocations: i.e. the addend is loaded from the relocation address. Most of the time this isn't a problem because RELA relocations aren't used on ARM (GNU/Linux at least) anyway, but it causes problems with prelink, which uses RELA on all targets for its conflict table. (Support for ifunc prelinking requires a prelink patch, not yet posted.) Anyway, this patch works, though I'm not 100% sure if it is correct: I notice that this code path received attention last year: https://sourceware.org/ml/libc-ports/2013-07/msg00000.html I'm not sure under what circumstances that patch would have had an effect, nor if my patch conflicts with that case. No regressions using Mentor's usual glibc cross-testing infrastructure. [BZ #16888] * sysdeps/arm/dl-machine.h (elf_machine_rela): Fix R_ARM_IRELATIVE handling.
* Increase minimum Linux kernel version to 2.6.32.Joseph Myers2014-04-306-42/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch increases the minimum Linux kernel version for glibc to 2.6.32, as discussed in the thread starting at <https://sourceware.org/ml/libc-alpha/2014-01/msg00511.html>. This patch just does the minimal change to arch_minimum_kernel settings (and LIBC_LINUX_VERSION, which determines the minimum kernel headers version, as it doesn't make sense for that to be older than the minimum kernel that can be used at runtime). Followups would be expected to do, roughly and not necessarily precisely in this order: * Remove __LINUX_KERNEL_VERSION checks in kernel-features.h files where those checks are always true / always false for kernels 2.6.32 and above. * Otherwise simplify/improve conditionals in those files (for example, where defining once in the main file then undefining in architecture-specific files makes things clearer than having lots of separate definitions of the same macro), possibly fixing in the process cases where a macro should optimally have been defined for a given architecture but wasn't. (In the review in preparation for this version increase I checked what the right conditions should be for all macros in the main kernel-features.h whose definitions there would have been affected by the increase - but I only fixed that subset of the issues found where --enable-kernel=2.6.32 would have caused a kernel feature to be wrongly assumed to be present, not any cases where a feature is not assumed but could be assumed.) * Remove conditionals on __ASSUME_* where they can now be taken to be always-true, and the definitions when the macros are only used in Linux-specific files. * Split more architectures out of the main kernel-features.h (like ex-ports architectures), once various of the architecture conditionals there have been eliminated so the new architecture-specific files are no larger than actually necessary. Tested x86_64. 2014-03-27 Joseph Myers <joseph@codesourcery.com> [BZ #9894] * sysdeps/unix/sysv/linux/configure.ac (LIBC_LINUX_VERSION): Change to 2.6.32. (arch_minimum_kernel): Change all 2.6.16 settings to 2.6.32. * sysdeps/unix/sysv/linux/configure: Regenerated. * sysdeps/unix/sysv/linux/microblaze/configure.ac: Remove file. * sysdeps/unix/sysv/linux/microblaze/configure: Likewise. * sysdeps/unix/sysv/linux/tile/configure.ac: Likewise. * sysdeps/unix/sysv/linux/tile/configure: Likewise. * README: Update reference to required Linux kernel version. * manual/install.texi (Linux): Update reference to required Linux kernel headers version. * INSTALL: Regenerated.
* More fixes for unsafe compiler optimizationAdhemerval Zanella2014-04-301-0/+1
| | | | | GCC 4.9 -ftree-loop-distribute-patterns now may transform loops in memcpy. Add the alias to internal GLIBC symbol to avoid PLT creation.
* [BZ #16823] Fix log1pl returning wrong infinity signStefan Liebler2014-04-293-3/+3
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* FixAdhemerval Zanella2014-04-292-2/+2
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* PowerPC: Suppress unnecessary FPSCR writeAdhemerval Zanella2014-04-297-16/+48
| | | | | | | This patch optimizes the FPSCR update on exception and rounding change functions by just updating its value if new value if different from current one. It also optimizes fedisableexcept and feenableexcept by removing an unecessary FPSCR read.
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