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* x86: Remove vsyscall usageAdhemerval Zanella2015-06-096-74/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the vsyscall usage for x86_64 port. As indicated by kernel code comments [1], vsyscalls are a legacy ABI and its concept is problematic: - It interferes with ASLR. - It's awkward to write code that lives in kernel addresses but is callable by userspace at fixed addresses. - The whole concept is impossible for 32-bit compat userspace. - UML cannot easily virtualize a vsyscall. The VDSO is a better approach for such functionality. Tested on i686, x86_64, and x32. * sysdeps/unix/sysv/linux/i386/gettimeofday.c (__gettimeofday_syscall): Remove vsyscall fallback. * sysdeps/unix/sysv/linux/i386/time.c (__time_syscall): Likewise. * sysdeps/unix/sysv/linux/x86/gettimeofday.c (__gettimeofday_syscall): Add syscall fallback function. (gettimeofday_ifunc): Use __gettimeofday_syscall as fallback mechanism if vDSO is not present. * sysdeps/unix/sysv/linux/x86/time.c (__time_syscall): Add syscall fallback function. (time_ifunc): Use __time_syscall as fallback mechanism if vDSO is not present. * sysdeps/unix/sysv/linux/x86_64/gettimeofday.c: Remove file. * sysdeps/unix/sysv/linux/x86_64/time.c: Likewise. [1] arch/x86/kernel/vsyscall_64.c
* Fix regcomp wcscoll, wcscmp namespace (bug 18497).Joseph Myers2015-06-093-7/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | regcomp brings in references to wcscoll, which isn't in all the standards that contain regcomp. In turn, wcscoll brings in references to wcscmp, also not in all those standards. This patch fixes this by making those functions into weak aliases of __wcscoll and __wcscmp and calling those names instead as needed. Tested for x86_64 and x86 (testsuite, and that disassembly of installed shared libraries is unchanged by the patch). [BZ #18497] * wcsmbs/wcscmp.c [!WCSCMP] (WCSCMP): Define as __wcscmp instead of wcscmp. (wcscmp): Define as weak alias of WCSCMP. * wcsmbs/wcscoll.c (STRCOLL): Define as __wcscoll instead of wcscoll. (USE_HIDDEN_DEF): Define. [!USE_IN_EXTENDED_LOCALE_MODEL] (wcscoll): Define as weak alias of __wcscoll. Don't use libc_hidden_weak. * wcsmbs/wcscoll_l.c (STRCMP): Define as __wcscmp instead of wcscmp. * sysdeps/i386/i686/multiarch/wcscmp-c.c [SHARED] (libc_hidden_def): Define __GI___wcscmp instead of __GI_wcscmp. (weak_alias): Undefine and redefine. * sysdeps/i386/i686/multiarch/wcscmp.S (wcscmp): Rename to __wcscmp and define as weak alias of __wcscmp. * sysdeps/x86_64/wcscmp.S (wcscmp): Likewise. * include/wchar.h (__wcscmp): Declare. Use libc_hidden_proto. (__wcscoll): Likewise. (wcscmp): Don't use libc_hidden_proto. (wcscoll): Likewise. * posix/regcomp.c (build_range_exp): Call __wcscoll instead of wcscoll. * posix/regexec.c (check_node_accept_bytes): Likewise. * conform/Makefile (test-xfail-XPG3/regex.h/linknamespace): Remove variable. (test-xfail-XPG4/regex.h/linknamespace): Likewise. (test-xfail-POSIX/regex.h/linknamespace): Likewise.
* Fix pathconf statvfs namespace (bug 18507).Joseph Myers2015-06-094-8/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | pathconf uses __statvfs64, and fpathconf uses __fstatvfs64. On systems using sysdeps/unix/sysv/linux/wordsize-64, __statvfs64 then brings in the strong symbol statvfs, and __fstatvfs64 brings in the strong symbol fstatvfs, which are not in all the standards that have pathconf and fpathconf. This patch fixes this by making those symbols into weak aliases. Tested for x86_64 and x86 (testsuite, and that disassembly of installed shared libraries is unchanged by the patch). [BZ #18507] * sysdeps/unix/sysv/linux/fstatvfs.c (fstatvfs): Rename to __fstatvfs and define as weak alias of __fstatvfs. Use libc_hidden_weak. * sysdeps/unix/sysv/linux/statvfs.c (statvs): Rename to __statvfs and define as weak alias of __statvfs. Use libc_hidden_weak. * sysdeps/unix/sysv/linux/wordsize-64/fstatvfs.c (__fstatvfs64): Define as alias of __fstatvfs, not fstatvfs. (fstatvfs64): Likewise. * sysdeps/unix/sysv/linux/wordsize-64/statvfs.c (__statvfs64): Define as alias of __statvfs, not statvfs. (statvfs64): Likewise. * conform/Makefile (test-xfail-POSIX/unistd.h/linknamespace): Remove variable.
* Consolidate sched_getcpuAdhemerval Zanella2015-06-0912-203/+10
| | | | | | | | This patch consolidates the sched_getcpu implementations across all arches (except tile, which requires its own). This patch removes the powerpc, x86_64 and x32 specific files and change the default linux one to use INLINE_VSYSCALL where possible (for ports that implements it).
* This patch adds vector cosf tests.Andrew Senkevich2015-06-0910-2/+221
| | | | | | | | | | | | | | | | | | * math/Makefile: Added CFLAGS for new tests. * math/test-float-vlen16.h: New file. * math/test-float-vlen4.h: New file. * math/test-float-vlen8.h: New file. * math/test-double-vlen2.h: Fixed 2 argument macro and comment. * sysdeps/x86_64/fpu/Makefile: Added new tests and variables. * sysdeps/x86_64/fpu/libm-test-ulps: Regenerated. * sysdeps/x86_64/fpu/test-float-vlen16-wrappers.c: New file. * sysdeps/x86_64/fpu/test-float-vlen16.c: New file. * sysdeps/x86_64/fpu/test-float-vlen4-wrappers.c: New file. * sysdeps/x86_64/fpu/test-float-vlen4.c: New file. * sysdeps/x86_64/fpu/test-float-vlen8-avx2-wrappers.c: New file. * sysdeps/x86_64/fpu/test-float-vlen8-avx2.c: New file. * sysdeps/x86_64/fpu/test-float-vlen8-wrappers.c: New file. * sysdeps/x86_64/fpu/test-float-vlen8.c: New file.
* Vector cosf for x86_64.Andrew Senkevich2015-06-0918-2/+2436
| | | | | | | | | | | | | | | | | | | | | | | | | | | Here is implementation of vectorized cosf containing SSE, AVX, AVX2 and AVX512 versions according to Vector ABI <https://groups.google.com/forum/#!topic/x86-64-abi/LmppCfN1rZ4>. * sysdeps/x86_64/fpu/Makefile (libmvec-support): Added new files. * sysdeps/x86_64/fpu/Versions: New versions added. * sysdeps/x86_64/fpu/svml_s_cosf4_core.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_s_cosf4_core.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_s_cosf4_core_sse4.S: New file. * sysdeps/x86_64/fpu/svml_s_cosf8_core_avx.S: New file. * sysdeps/x86_64/fpu/svml_s_cosf8_core.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_s_cosf8_core.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_s_cosf8_core_avx2.S: New file. * sysdeps/x86_64/fpu/svml_s_cosf16_core.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_s_cosf16_core.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_s_cosf16_core_avx512.S: New file. * sysdeps/x86_64/fpu/svml_s_wrapper_impl.h: New file. * sysdeps/x86_64/fpu/svml_s_cosf_data.S: New file. * sysdeps/x86_64/fpu/svml_s_cosf_data.h: New file. * sysdeps/x86_64/fpu/multiarch/Makefile (libmvec-sysdep_routines): Added build of SSE, AVX2 and AVX512 IFUNC versions. * sysdeps/unix/sysv/linux/x86_64/libmvec.abilist: New versions added. * sysdeps/x86/fpu/bits/math-vector.h: Added SIMD declaration for cosf. * NEWS: Mention addition of x86_64 vector cosf.
* Addition of testing infrastructure for vector math functions.Andrew Senkevich2015-06-0911-0/+299
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We test vector math functions using scalar tests infrastructure with help of special wrappers from scalar versions to vector ones. Wrapper implemented using platform specific vector types and placed in separate file for compilation with architecture specific options, main part of test has no such options. With help of system of definitions unfolding of which is drived from test code we have wrapper called in individual testing function instead of scalar function. Also system of definitions includes generated during make check header math/libm-have-vector-test.h with series of conditional definitions which help to avoid build fails for functions having no vector versions; runtime architecture check to prevent runtime fails of test run on inappropriate hardware. * math/Makefile: Added rules for vector tests. * math/gen-libm-have-vector-test.sh: Added generation of wrapper declaration under condition. * math/test-double-vlen2.h: New file. * math/test-double-vlen4.h: New file. * math/test-double-vlen8.h: New file. * math/test-vec-loop.h: Added initialization macro. * sysdeps/x86_64/fpu/Makefile: Added variables for vector tests. * sysdeps/x86_64/fpu/libm-test-ulps: Regenarated. * sysdeps/x86_64/fpu/math-tests-arch.h: New file. * sysdeps/x86_64/fpu/test-double-vlen2-wrappers.c: New file. * sysdeps/x86_64/fpu/test-double-vlen2.c: New file. * sysdeps/x86_64/fpu/test-double-vlen4-avx2-wrappers.c: New file. * sysdeps/x86_64/fpu/test-double-vlen4-avx2.c: New file. * sysdeps/x86_64/fpu/test-double-vlen4-wrappers.c: New file. * sysdeps/x86_64/fpu/test-double-vlen4.c: New file. * sysdeps/x86_64/fpu/test-double-vlen8-wrappers.c: New file. * sysdeps/x86_64/fpu/test-double-vlen8.c: New file.
* Start of series of patches with x86_64 vector math functions.Andrew Senkevich2015-06-0921-0/+1452
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Here is implementation of cos containing SSE, AVX, AVX2 and AVX512 versions according to Vector ABI which had been discussed in <https://groups.google.com/forum/#!topic/x86-64-abi/LmppCfN1rZ4>. Vector math library build and ABI testing enabled by default for x86_64. * sysdeps/x86_64/fpu/Makefile: New file. * sysdeps/x86_64/fpu/Versions: New file. * sysdeps/x86_64/fpu/svml_d_cos_data.S: New file. * sysdeps/x86_64/fpu/svml_d_cos_data.h: New file. * sysdeps/x86_64/fpu/svml_d_cos2_core.S: New file. * sysdeps/x86_64/fpu/svml_d_cos4_core.S: New file. * sysdeps/x86_64/fpu/svml_d_cos4_core_avx.S: New file. * sysdeps/x86_64/fpu/svml_d_cos8_core.S: New file. * sysdeps/x86_64/fpu/svml_d_wrapper_impl.h: New file. * sysdeps/x86_64/fpu/multiarch/svml_d_cos2_core.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_d_cos2_core_sse4.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_d_cos4_core.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_d_cos4_core_avx2.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_d_cos8_core.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_d_cos8_core_avx512.S: New file. * sysdeps/x86_64/fpu/multiarch/Makefile (libmvec-sysdep_routines): Added build of SSE, AVX2 and AVX512 IFUNC versions. * sysdeps/x86/fpu/bits/math-vector.h: Added SIMD declaration for cos. * math/bits/mathcalls.h: Added cos declaration with __MATHCALL_VEC. * sysdeps/x86_64/configure.ac: Options for libmvec build. * sysdeps/x86_64/configure: Regenerated. * sysdeps/x86_64/sysdep.h (cfi_offset_rel_rsp): New macro. * sysdeps/unix/sysv/linux/x86_64/libmvec.abilist: New file. * manual/install.texi (Configuring and compiling): Document --disable-mathvec. * INSTALL: Regenerated. * NEWS: Mention addition of libmvec and x86_64 vector cos.
* This patch adds detection of availability for AVX512F and AVX512DQ ISAs.Andrew Senkevich2015-06-082-0/+34
| | | | | | | | * sysdeps/x86_64/multiarch/init-arch.h (bit_AVX512F_Usable, bit_AVX512DQ_Usable, bit_Opmask_state, bit_ZMM0_15_state, bit_ZMM16_31_state): New macro. * sysdeps/x86_64/multiarch/init-arch.c (__init_cpu_features): Check and set bit_AVX512F_Usable, bit_AVX512DQ_Usable.
* posix_fallocate: Emulation fixes and documentation [BZ #15661]Florian Weimer2015-06-052-38/+96
| | | | | | | | Handle signed integer overflow correctly. Detect and reject O_APPEND. Document drawbacks of emulation. This does not completely address bug 15661, but improves the situation somewhat.
* nptl: Rewrite cancellation macrosAdhemerval Zanella2015-06-0473-1161/+192
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch changes the way cancellation entrypoints are defined to instead call the macro SYSCALL_CANCEL. An usual cnacellation definition is defined as: if (SINGLE_THREAD_P) return INLINE_SYSCALL (syscall, NARGS, args...) int oldtype = LIBC_CANCEL_ASYNC (); return INLINE_SYSCALL (syscall, NARGS, args...) LIBC_CANCEL_RESET (oldtype); And it is rewrited as just: SYSCALL_CANCEL (syscall, args...) The idea is to remove LIBC_CANCEL_ASYNC/LIBC_CANCEL_RESET explicit usage. Tested on i386, x86_64, powerpc32, powerpc64le, arm, and aarch64. * sysdeps/unix/sysdep.h [SYSCALL_CANCEL]: New macro: define cancellable syscalls. (SYS_ify): Add guard to no redefine it. (INLINE_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/accept4.c (accept4): Remove LIBC_CANCEL_ASYNC/INLINE_SYSCALL/LIBC_CANCEL_RESET and use SYSCALL_CANCEL instead. * sysdeps/unix/sysv/linux/alpha/fdatasync.c (__fdatasync): Likewise. * sysdeps/unix/sysv/linux/arm/pread.c (__libc_pread): Likewise. * sysdeps/unix/sysv/linux/arm/pread64.c (__libc_pread64): Likewise. * sysdeps/unix/sysv/linux/arm/pwrite.c (__libc_pwrite): Likewise. * sysdeps/unix/sysv/linux/arm/pwrite64.c (__libc_pwrite64): Likewise. * sysdeps/unix/sysv/linux/epoll_pwait.c (epoll_pwait): Likewise. * sysdeps/unix/sysv/linux/fallocate.c (fallocate): Likewise. * sysdeps/unix/sysv/linux/fallocate64.c (fallocate64): Likewise. * sysdeps/unix/sysv/linux/generic/open.c (__libc_open): Likewise. * sysdeps/unix/sysv/linux/generic/open64.c (__libc_open64): Likewise. * sysdeps/unix/sysv/linux/generic/pause.c (__libc_pause): Likewise. * sysdeps/unix/sysv/linux/generic/poll.c (__poll): Likewise. * sysdeps/unix/sysv/linux/generic/recv.c (__libc_recv): Likewise. * sysdeps/unix/sysv/linux/generic/select.c (__select): Likewise. * sysdeps/unix/sysv/linux/generic/send.c (__libc_send): Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/pread.c (__libc_pread): Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/pread64.c (__libc_pread64): Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/preadv.c (__libc_preadv): Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/preadv64.c (__libc_readv64): Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/pwrite.c (__libc_pwrite): Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/pwrite64.c (__libc_pwrite64): Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/pwritev.c (__libc_pwritev): Likewise. * sysdeps/sysv/linux/generic/wordsize-32/pwritev64.c (__libc_pwritev64): Likewise. * sysdeps/unix/sysv/linux/i386/fcntl.c (__libc_fcntl): Likewise. * sysdeps/unix/sysv/linux/mips/mips32/sync_file_range.c (sync_file_range): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n32/fallocate.c (fallocate): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n32/fallocate64.c (fallocate64): Likewise. * sysdeps/unix/sysv/linux/mips/pread.c (__libc_pread): Likewise. * sysdeps/unix/sysv/linux/mips/pread64.c (__libc_pread64): Likewise. * sysdeps/unix/sysv/linux/mips/pwrite.c (__libc_pwrite): Likewise. * sysdeps/unix/sysv/linux/mips/pwrite64.c (__libc_pwrite64): Likewise. * sysdeps/unix/sysv/linux/msgrcv.c (__libc_msgrcv): Likewise. * sysdeps/unix/sysv/linux/msgsnd.c (__libc_msgsnd): Likewise. * sysdeps/unix/sysv/linux/open64.c (__libc_open64): Likewise. * sysdeps/unix/sysv/linux/openat.c (__libc_openat): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/pread.c (__libc_pread): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/pread64.c (__libc_read64): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/pwrite.c (__libc_write): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/pwrite64.c (__libc_write64): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/fcntl.c (__libc_fcntl): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/pread.c (__libc_pread): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/pread64.c (__libc_pread64): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/pwrite.c (__libc_pwrite): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/pwrite64.c (__libc_pwrite64): Likewise. * sysdeps/sysv/linux/powerpc/powerpc64/sync_file_range.c (sync_file_range): Likewise. * sysdeps/unix/sysv/linux/ppoll.c (ppoll): Likewise. * sysdeps/unix/sysv/linux/pread.c (__libc_pread): Likewise. * sysdeps/unix/sysv/linux/pread64.c (__libc_pread64): Likewise. * sysdeps/unix/sysv/linux/preadv.c (__libc_preadv): Likewise. * sysdeps/unix/sysv/linux/pselect.c (__pselect): Likewise. * sysdeps/unix/sysv/linux/pwrite.c (__libc_pwrite): Likewise. * sysdeps/unix/sysv/linux/pwrite64.c (__libc_pwrite64): Likewise. * sysdeps/unix/sysv/linux/pwritev.c (PWRITEV): Likewise. * sysdeps/unix/sysv/linux/readv.c (__libc_readv): Likewise. * sysdeps/unix/sysv/linux/recvmmsg.c (recvmmsg): Likewise. * sysdeps/unix/sysv/linux/sendmmsg.c (sendmmsg): Likewise. * sysdeps/unix/sysv/linux/sh/pread.c (__libc_pread): Likewise. * sysdeps/unix/sysv/linux/sh/pread64.c (__libc_pread64): Likewise. * sysdeps/unix/sysv/linux/sh/pwrite.c (__libc_pwrite): Likewise. * sysdeps/unix/sysv/linux/sh/pwrite64.c (__libc_pwrite64): Likewise. * sysdeps/unix/sysv/linux/sigsuspend.c (__sigsuspend): Likewise. * sysdeps/unix/sysv/linux/sigtimedwait.c (__sigtimedwait): Likewise. * sysdeps/unix/sysv/linux/sigwaitinfo.c (__sigwaitinfo): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/msgrcv.c (__libc_msgrcv): Likewise. * sysdeps/unix/sysv/linux/sync_file_range.c (sync_file_range): Likewise. * sysdeps/unix/sysv/linux/tcdrain.c (__libc_tcdrain): Likewise. * sysdeps/unix/sysv/linux/timer_routines.c (timer_helper_thread): Likewise. * sysdeps/unix/sysv/linux/wait.c (__libc_wait): Likewise. * sysdeps/unix/sysv/linux/waitid.c (__waitid): Likewise. * sysdeps/unix/sysv/linux/waitpid.c (__libc_waitpid): Likewise. * sysdeps/unix/sysv/linux/wordsize-64/fallocate.c (fallocate): Likewise. * sysdeps/unix/sysv/linux/wordsize-64/preadv.c (preadv): Likewise. * sysdeps/unix/sysv/linux/wordsize-64/pwritev.c (pwritev): Likewise. * sysdeps/unix/sysv/linux/writev.c (__libc_writev): Likewise. * sysdeps/unix/sysv/linux/x86_64/recv.c (__libc_recv): Likewise. * sysdeps/unix/sysv/linux/x86_64/send.c (__libc_send): Likewise.
* ARM: VDSO supportNathan Lynch2015-06-045-0/+84
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Beginning with the upcoming 4.1 release, Linux on a subset of 32-bit ARM hardware will provide fast user-space implementations of the following system calls: - gettimeofday - clock_gettime The kernel implementation depends on the ARMv7 Generic Timers Extension to accelerate these system calls. So CPUs such as Cortex-A15 and -A7 benefit, while Cortex-A9, -A8, and pre-v7 CPUs do not. On systems where the VDSO does not provide any speedup, the kernel prevents the relevant symbol lookups from succeeding. On OMAP5 (Cortex-A15) gettimeofday latency decreases from ~350ns to ~120ns. On BeagleBone Black (Cortex-A8) it goes from ~650ns to ~660ns, which to my mind is an acceptable cost. Verified that no new test failures are introduced on kernels with and without the VDSO. * sysdeps/unix/sysv/linux/arm/Makefile: (sysdep_routines): Include dl-vdso. * sysdeps/unix/sysv/linux/arm/init-first.c: New file: Use VDSO routines for gettimeofday, clock_gettime if available. * sysdeps/unix/sysv/linux/arm/libc-vdso.h: New file: Declare VDSO symbols. * sysdeps/unix/sysv/linux/arm/sysdep.h: [HAVE_GETTIMEOFDAY_VSYSCALL]: Define. [HAVE_CLOCK_GETTIME_VSYSCALL]: Define. * sysdeps/unix/sysv/linux/arm/Versions: Add __vdso_clock_gettime.
* Use inline syscalls for non-cancellable versionsAdhemerval Zanella2015-06-042-34/+44
| | | | | | This patch uses inline calls (through INLINE_SYSCALL macro) to define the non-cancellable functions macros to avoid use of the syscall_nocancel entrypoint.
* NaCl: Implement nacl_interface_ext_supply entry point.Roland McGrath2015-06-035-2/+95
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* Replace finite with isfinite.Wilco Dijkstra2015-06-033-3/+3
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* This patch renames all uses of __isinf*, __isnan*, __finite* and __signbit* ↵Wilco Dijkstra2015-06-0334-53/+53
| | | | to use standard C99 macros. This has no effect on generated code.
* Use better variable names in MIPS syscall macros.Joseph Myers2015-06-023-16/+16
| | | | | | | | | | | | | | | | | | | | | | | | Carlos noted in <https://sourceware.org/ml/libc-alpha/2015-05/msg00680.html> that various ports use potentially problematic short variables names in their syscall macros, which could shadow variables with the same name from containing scopes. This patch fixes variables called err and ret in MIPS macros. (I left result_var and _sys_result - separate variables in different macros, which need separate names - alone.) Tested for mips64 (all three ABIs) that installed stripped shared libraries are unchanged by this patch. * sysdeps/unix/sysv/linux/mips/mips32/sysdep.h (INLINE_SYSCALL): Use variable name _sc_err instead of err. [__mips16] (INTERNAL_SYSCALL_NCS): Use variable name _sc_ret instead of ret. * sysdeps/unix/sysv/linux/mips/mips64/n32/sysdep.h (INLINE_SYSCALL): Use variable name _sc_err instead of err. * sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h (INLINE_SYSCALL): Likewise.
* Use libc_hidden_proto / libc_hidden_def with __strnlen.Joseph Myers2015-06-026-2/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Various code in glibc uses __strnlen instead of strnlen for namespace reasons. However, __strnlen does not use libc_hidden_proto / libc_hidden_def (as is normally done for any function defined and called within the same library, whether or not exported from the library and whatever namespace it is in), so the compiler does not know that those calls are to a function within libc. This patch uses libc_hidden_proto / libc_hidden_def with __strnlen. On x86_64, it makes no difference to the installed stripped shared libraries. On 32-bit x86, it causes __strnlen calls to go to the same place as strnlen calls (the fallback strnlen implementation), rather than through a PLT entry for the strnlen IFUNC; I'm not sure of the logic behind when calls from within libc should use IFUNCs versus when they should go direct to a particular function implementation, but clearly it doesn't make sense for strnlen and __strnlen to be handled differently in this regard. Tested for x86_64 and x86 (testsuite, and comparison of installed shared libraries as described above). * string/strnlen.c [!STRNLEN] (__strnlen): Use libc_hidden_def. * include/string.h (__strnlen): Use libc_hidden_proto. * sysdeps/aarch64/strnlen.S (__strnlen): Use libc_hidden_def. * sysdeps/i386/i686/multiarch/strnlen-c.c [SHARED] (libc_hidden_def): Define __GI___strnlen as well as __GI_strnlen. * sysdeps/powerpc/powerpc32/power4/multiarch/strnlen-power7.S (libc_hidden_def): Undefine and redefine. * sysdeps/powerpc/powerpc32/power4/multiarch/strnlen-ppc32.c [SHARED] (libc_hidden_def): Define __GI___strnlen as well as __GI_strnlen. * sysdeps/powerpc/powerpc32/power7/strnlen.S (__strnlen): Use libc_hidden_def. * sysdeps/tile/tilegx/strnlen.c (__strnlen): Likewise.
* 2015-06-02 Szabolcs Nagy <szabolcs.nagy@arm.com>Wilco Dijkstra2015-06-021-26/+26
| | | | * sysdeps/aarch64/libm-test-ulps: Update.
* x86: clock_gettime and timespec_get vDSO cleanupAdhemerval Zanella2015-06-015-63/+9
| | | | | This patch removes the x86 specific timespec_get and clock_gettime implementation to use generic HAVE_CLOCK_GETTIME_VSYSCALL way.
* powerpc: setcontext.S uses power6 mtfsf when not supported [BZ #18116]Martin Sebor2015-06-012-14/+52
| | | | | | | | | | | | | The attached patch fixes a glibc build failure with gcc 5 on powerpc64le caused by a recent change in gcc where the compiler defines the _ARCH_PWR6 macro when processing assembly files but doesn't invoke the assembler in the corresponding machine mode (unless it has been explicitly configured to target POWER 6 or later). A bug had been filed with gcc for this (65341) but was closed as won't fix. Glibc relies on the _ARCH_PWR6 macro in a few .S files to make use of Power ISA 2.5 instructions (specifically, the four-argument form of the mtfsf insn). A similar problem had occurred in the past (bug 10118) but the fix that was committed for it didn't anticipate this new problem.
* Update powerpc-fpu libm-test-ulps.Adhemerval Zanella2015-05-291-516/+450
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* NaCl: Make thread exit wake pthread_join.Roland McGrath2015-05-284-2/+156
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* NaCl: Fix lll_futex_timed_wait timeout calculation.Roland McGrath2015-05-281-12/+12
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* 2015-05-28 Wilco Dijkstra <wdijkstr@arm.com>Wilco Dijkstra2015-05-282-10/+2
| | | | | * sysdeps/ieee754/dbl-64/s_fabs.c: (__fabs): Call __builtin_fabs. * sysdeps/ieee754/flt-32/s_fabsf.c: (__fabsf): Likewise.
* tile: use better variable naming in INLINE_SYSCALLChris Metcalf2015-05-261-14/+15
| | | | | | | | | | | | | | | At issue for INLINE_SYSCALL was that it used "err" and "val" as variable names in a #define, so that if it was used in a context where the "caller" was also using "err" or "val", and those variables were passed in to INLINE_SYSCALL, we would end up referencing the internal shadowed variables instead. For example, "char val" in check_may_shrink_heap() in sysdeps/unix/sysv/linux/malloc-sysdep.h was being shadowed by the syscall return "val" in INLINE_SYSCALL, causing the "char val" not to get updated at all, and may_shrink_heap ended up always false. A similar fix was made to INTERNAL_VSYSCALL_CALL.
* NaCl: Fix thinko in last change.Roland McGrath2015-05-261-8/+9
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* NaCl: Add NaCl-specific __lll_timedlock_wait.Roland McGrath2015-05-261-0/+52
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* Split timed-wait functions out of nptl/lowlevellock.c.Roland McGrath2015-05-2610-0/+10
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* Consolidate gettimeofday across aarch64/s390/tileAdhemerval Zanella2015-05-2610-88/+9
| | | | | | | | This patch removes the architecture specific gettimeofday implementation to use the vDSO symbol and consolidate it on a common Linux one. Similar to clock_gettime and clock_getres vDSO implementation, each port that supports gettimeofday through vDSO should just implement INLINE_VSYSCALL to access the symbol and define HAVE_{GETTIME,GETRES}_VSYSCAL as 1.
* struct stat is not posix conformSzabolcs Nagy2015-05-264-8/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On 21/05/15 05:29, Siddhesh Poyarekar wrote: > On Wed, May 20, 2015 at 06:55:02PM +0100, Szabolcs Nagy wrote: >> i guess it's ok for consistency if i fix struct stat64 >> too to use __USE_XOPEN2K8. >> >> i will run some tests and come back with a patch > > I also think it would be appropriate to change this code in other > architectures (microblaze and nacl IIRC) to make all of them > consistent. It is a mechanical enough change IMO that all arch > maintainer acks is not necessary. > here is the patch with consistent __USE_XOPEN2K8 ok to commit? 2015-05-21 Szabolcs Nagy <szabolcs.nagy@arm.com> [BZ #18234] * conform/data/sys/stat.h-data (struct stat): Add tests for st_atim, st_mtim and st_ctim members. * sysdeps/nacl/bits/stat.h (struct stat, struct stat64): Make st_atim, st_ctim, st_mtim visible under __USE_XOPEN2K8 only. * sysdeps/unix/sysv/linux/generic/bits/stat.h (struct stat,): (struct stat64): Likewise. * sysdeps/unix/sysv/linux/ia64/bits/stat.h (struct stat,): (struct stat64): Likewise. * sysdeps/unix/sysv/linux/microblaze/bits/stat.h (struct stat,): (struct stat64): Likewise.
* Consolidate vDSO macros and usageAdhemerval Zanella2015-05-2626-552/+288
| | | | | | | | | | | | | | | | This patch consolidate the Linux vDSO define and usage across all ports that uses it. The common vDSO definitions and calling through {INLINE/INTERNAL}_VSYSCALL macros are moved to a common header sysdep-vdso.h and vDSO name declaration and prototype is defined using a common macro. Also PTR_{MANGLE,DEMANGLE} is added to ports that does not use them for vDSO calls (aarch64, powerpc, s390, and tile) and thus it will reflect in code changes. For ports that already implement pointer mangling/demangling in vDSO system (i386, x32, x86_64) this patch is mainly a code refactor. Checked on x32, x86_64, x32, ppc64le, and aarch64.
* Remove socket.S implementationAdhemerval Zanella2015-05-2261-1718/+609
| | | | | | | | | | | | | | | This patch removes the socket.S implementation for all ports and replace it by a C implementation using socketcall. For ports that implement the syscall directly, there is no change. The patch idea is to simplify the socket function implementation that uses the socketcall to be based on C implemetation instead of a pseudo assembly implementation with arch specific parts. The patch then remove the assembly implementatation for the ports which uses socketcall (i386, microblaze, mips, powerpc, sparc, m68k, s390 and sh). I have cross-build GLIBC for afore-mentioned ports and tested on both i386 and ppc32 without regressions.
* Fix ldbl-128 / ldbl-128ibm tanl for -Wuninitialized.Joseph Myers2015-05-222-0/+24
| | | | | | | | | | | | | | | The ldbl-128 and ldbl-128ibm implementations of tanl produce uninitialized variable warnings with -Wuninitialized because of a variable that is initialized only conditionally, then used under the same conditions under which it is set. This patch uses DIAG_* macros to suppress those warnings. Tested for powerpc and mips64. * sysdeps/ieee754/ldbl-128/k_tanl.c: Include <libc-internal.h>. (__kernel_tanl): Ignore uninitialized warnings around use of SIGN. * sysdeps/ieee754/ldbl-128ibm/k_tanl.c: Include <libc-internal.h>. (__kernel_tanl): Ignore uninitialized warnings around use of SIGN.
* Fix ldbl-128 / ldbl-128ibm erfcl for -WuninitializedJoseph Myers2015-05-222-2/+2
| | | | | | | | | | | | | | | | | | | The ldbl-128 and ldbl-128ibm implementations of erfcl produce uninitialized variable warnings with -Wuninitialized because of switch statements where in fact one of the cases will always be executed, but the compiler does not see that these cases cover all possibilities (and because the reasoning that it does involves inequalities on the representation of a floating point value leading to a set of possible values for 8.0 times that value, converted to int, it's highly nontrivial for the compiler to see that). This patch fixes those warnings by converting the last case in those switch statements to a "default" case. Tested for powerpc and mips64. * sysdeps/ieee754/ldbl-128/s_erfl.c (__erfcl): Make case 9 in switch statement into default case. * sysdeps/ieee754/ldbl-128ibm/s_erfl.c (__erfcl): Likewise.
* Fix ldbl-128 / ldbl-128ibm asinl for -Wuninitialized.Joseph Myers2015-05-222-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | The ldbl-128 and ldbl-128ibm implementations of asinl produce uninitialized variable warnings with -Wuninitialized because the code for small arguments in fact always returns but the compiler cannot see this and instead sees that a variable would be uninitialized if the "if (huge + x > one)" conditional used to force the "inexact" exception were false. All the code in libm trying to force "inexact" for functions that are not exactly defined is suspect and should be removed at some point given that we now have a clear definition of the accuracy goals for libm functions which, following C99/C11, does not require anything about "inexact" for most functions (likewise, the multi-precision code that tries to give correctly-rounded results, very slowly, for functions for which the goals clearly do not include correct rounding, if the faster paths are accurate enough). However, for now this patch simply changes the code to use math_force_eval, rather than "if", to ensure the evaluation of the inexact computation. Tested for powerpc and mips64. * sysdeps/ieee754/ldbl-128/e_asinl.c (__ieee754_asinl): Don't use a conditional in forcing "inexact". * sysdeps/ieee754/ldbl-128ibm/e_asinl.c (__ieee754_asinl): Likewise.
* Fix pathconf basename namespace (bug 18444).Joseph Myers2015-05-221-1/+1
| | | | | | | | | | | | | | | | | | | | | pathconf (sysdeps/unix/sysv/linux/pathconf.c) uses basename. But pathconf is in POSIX back to 1990 while basename is only reserved with external linkage in those standards including XPG functions. This patch fixes this namespace issue in the usual way, renaming basename to __basename and making it into a weak alias. Tested for x86_64 and x86 (testsuite, and that disassembly of installed shared libraries is unchanged by the patch). [BZ #18444] * string/basename.c (basename): Rename to __basename and define as weak alias of __basename. Use libc_hidden_weak. * include/string.h (__basename): Declare. Use libc_hidden_proto. * sysdeps/unix/sysv/linux/pathconf.c (distinguish_extX): Call __basename instead of basename. * conform/Makefile (test-xfail-POSIX2008/unistd.h/linknamespace): Remove variable. (test-xfail-XOPEN2K8/unistd.h/linknamespace): Likewise.
* Fix lgamma implementations for -Wuninitialized.Joseph Myers2015-05-213-0/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If you remove the "override CFLAGS += -Wno-uninitialized" in math/Makefile, you get errors from lgamma implementations of the form: ../sysdeps/ieee754/dbl-64/e_lgamma_r.c: In function '__ieee754_lgamma_r': ../sysdeps/ieee754/dbl-64/e_lgamma_r.c:297:13: error: 'nadj' may be used uninitialized in this function [-Werror=maybe-uninitialized] if(hx<0) r = nadj - r; This is one of the standard kinds of false positive uninitialized warnings: nadj is set under a certain condition, and then later used under the same condition. This patch uses DIAG_* macros to suppress the warning on the use of nadj. The ldbl-128 / ldbl-128ibm implementation has a substantially different structure that avoids this issue. Tested for x86_64. (In fact this patch eliminates the need for that -Wno-uninitialized on x86_64, but I want to test on more architectures before removing it.) * sysdeps/ieee754/dbl-64/e_lgamma_r.c: Include <libc-internal.h>. (__ieee754_lgamma_r): Ignore uninitialized warnings around use of NADJ. * sysdeps/ieee754/flt-32/e_lgammaf_r.c: Include <libc-internal.h>. (__ieee754_lgammaf_r): Ignore uninitialized warnings around use of NADJ. * sysdeps/ieee754/ldbl-96/e_lgammal_r.c: Include <libc-internal.h>. (__ieee754_lgammal_r): Ignore uninitialized warnings around use of NADJ.
* Fix sysdeps/ieee754/dbl-64/mpa.c for -Wuninitialized.Joseph Myers2015-05-211-2/+3
| | | | | | | | | | | | | | | | | | | | If you remove the "override CFLAGS += -Wno-uninitialized" in math/Makefile, one of the errors you get is: ../sysdeps/ieee754/dbl-64/mpa.c: In function '__mp_dbl.part.0': ../sysdeps/ieee754/dbl-64/mpa.c:183:5: error: 'c' may be used uninitialized in this function [-Werror=maybe-uninitialized] c *= X[0]; The problem is that the p < 5 case initializes c if p is 1, 2, 3 or 4 but not otherwise, and in fact p is positive for all calls to this function so the uninitialized case can't actually occur. This patch replaces the "if (p == 4)" last case with a comment so the compiler can see that all paths do initialize c. Tested for x86_64. * sysdeps/ieee754/dbl-64/mpa.c (norm): Remove if condition on (p == 4) case.
* NaCl: Set tid field to a unique value.Roland McGrath2015-05-203-0/+98
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* Move usleep.c using nanosleep to sysdeps/posix.Roland McGrath2015-05-201-0/+0
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* i386: Remove six-argument specialized implementationsAdhemerval Zanella2015-05-205-197/+2
| | | | | | This patch removes the specialized i386 assembly implementations for fallocate{64}, pselect, and sync_file_range now that i386 have support for 6 argument syscalls.
* Fix ldbl-96 remquol (finite, Inf) (bug 18244).Joseph Myers2015-05-191-1/+1
| | | | | | | | | | | | | | | | | | ldbl-96 remquol wrongly handles the case where the first argument is finite and the second infinite, because the check for the second argument being a NaN fails to disregard the explicit high mantissa bit and so wrongly interprets an infinity as being a NaN. This patch fixes this by masking off that bit, and improves test coverage for both remainder and remquo (various cases were missing tests, or, as in the case of the bug, were tested only for one of the two functions). Tested for x86_64 and x86. [BZ #18244] * sysdeps/ieee754/ldbl-96/s_remquol.c (__remquol): Ignore explicit high mantissa bit when testing whether P is a NaN. * math/libm-test.inc (remainder_test_data): Add more tests. (remquo_test_data): Likewise.
* Fix i386 atanhl spurious underflows (bug 18049).Joseph Myers2015-05-191-0/+10
| | | | | | | | | | | | | | | | The i386 implementation of atanhl, for small arguments, does a calculation that involves computing twice the square of the argument, resulting in spurious underflows for some arguments. This patch fixes this by just returning the argument when its exponent is below -32, with underflow being forced as needed for subnormal arguments. Tested for x86 and x86_64. [BZ #18049] * sysdeps/i386/fpu/e_atanhl.S (__ieee754_atanhl): For exponents below -32, return the argument, with underflow if subnormal. * math/auto-libm-test-in: Add more tests of atanh. * math/auto-libm-test-out: Regenerated.
* BZ#18434: Fix sem_post EOVERFLOW check for [!__HAVE_64B_ATOMICS].Roland McGrath2015-05-191-4/+4
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* alpha: Update libm-test-ulpsRichard Henderson2015-05-191-300/+390
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* Refactor opendir.Roland McGrath2015-05-181-41/+81
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* Fix atanhl missing underflows (bug 16352).Joseph Myers2015-05-157-4/+76
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Similar to various other bugs in this area, some atanh implementations do not raise the underflow exception for subnormal arguments, when the result is tiny and inexact. This patch forces the exception in a similar way to previous fixes. (No change in this regard is needed for the i386 implementation; special handling to force underflows in these cases will only be needed there when the spurious underflows, bug 18049, get fixed.) Tested for x86_64, x86, powerpc and mips64. [BZ #16352] * sysdeps/i386/fpu/e_atanh.S (dbl_min): New object. (__ieee754_atanh): Force underflow exception for results with small absolute value. * sysdeps/i386/fpu/e_atanhf.S (flt_min): New object. (__ieee754_atanhf): Force underflow exception for results with small absolute value. * sysdeps/ieee754/dbl-64/e_atanh.c: Include <float.h>. (__ieee754_atanh): Force underflow exception for results with small absolute value. * sysdeps/ieee754/flt-32/e_atanhf.c: Include <float.h>. (__ieee754_atanhf): Force underflow exception for results with small absolute value. * sysdeps/ieee754/ldbl-128/e_atanhl.c: Include <float.h>. (__ieee754_atanhl): Force underflow exception for results with small absolute value. * sysdeps/ieee754/ldbl-128ibm/e_atanhl.c: Include <float.h>. (__ieee754_atanhl): Force underflow exception for results with small absolute value. * sysdeps/ieee754/ldbl-96/e_atanhl.c: Include <float.h>. (__ieee754_atanhl): Force underflow exception for results with small absolute value. * math/auto-libm-test-in: Do not allow missing underflow exceptions from atanh. * math/auto-libm-test-out: Regenerated.
* Fix tanf spurious underflows (bug 18221).Joseph Myers2015-05-151-1/+1
| | | | | | | | | | | | | | | | The flt-32 implementation of tanf produces spurious underflow exceptions for some small arguments, through computing values on the order of x^5. This patch fixes this by adjusting the threshold for returning x (or, as applicable, +/- 1/x) to 2**-13 (the next term in the power series being x^3/3). Tested for x86_64 and x86. [BZ #18221] * sysdeps/ieee754/flt-32/k_tanf.c (__kernel_tanf): Use 2**-13 not 2**-28 as threshold for returning x or +/- 1/x. * math/auto-libm-test-in: Add more tests of tan. * math/auto-libm-test-out: Regenerated.
* Fix lgammaf spurious underflows (bug 18220).Joseph Myers2015-05-151-3/+3
| | | | | | | | | | | | | | | | | The flt-32 implementation of lgammaf produces spurious underflow exceptions for some large arguments, because of calculations involving x^-2 multiplied by small constants. This patch fixes this by adjusting the threshold for a simpler computation to 2**26 (the error in the simpler computation is on the order of 0.5 * log (x), for a result on the order of x * log (x)). Tested for x86_64 and x86. [BZ #18220] * sysdeps/ieee754/flt-32/e_lgammaf_r.c (__ieee754_lgammaf_r): Use 2**26 not 2**58 as threshold for returning x * (log (x) - 1). * math/auto-libm-test-in: Add another test of lgamma. * math/auto-libm-test-out: Regenerated.
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-11-16 16:44:31 +0000