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2017-12-24Deprecate external use of libio.h and _G_config.h.Zack Weinberg
libio.h was originally the header for a set of supported GNU extensions, but they have not been maintained as such in many years, they are now standing in the way of improvements to stdio, and we don't think there are any remaining external users. _G_config.h was never intended for public use, but predates the bits convention. Move both of these headers into the bits directory and provide stubs at top level which issue deprecation warnings. The contents of (bits/)libio.h and (bits/)_G_config.h are still exposed to external software via stdio.h; changing that requires more complex surgery than I have time to attempt right now. * libio/libio.h, libio/_G_config.h: New stub headers which issue a deprecation warning and then include <bits/libio.h>, <bits/_G_config.h> respectively. * libio/libio.h: Rename the original version of this file to libio/bits/libio.h. Error out if not included by stdio.h or the stub libio.h. * include/libio.h: Move to include/bits. Forward to libio/bits/libio.h. * sysdeps/generic/_G_config.h: Move to top-level bits/. Error out if not included by bits/libio.h or the stub _G_config.h. * sysdeps/unix/sysv/linux/_G_config.h: Move to sysdeps/unix/sysv/linux/bits. Error out if not included by bits/libio.h or the stub _G_config.h. * libio/stdio.h: Include bits/libio.h, not libio.h. * libio/Makefile: Install bits/libio.h and bits/_G_config.h as well as libio.h and _G_config.h. * csu/init.c, libio/fmemopen.c, libio/iolibio.h, libio/oldfmemopen.c * libio/strfile.h, stdio-common/vfscanf.c * sysdeps/pthread/flockfile.c, sysdeps/pthread/funlockfile.c Include stdio.h, not _G_config.h nor libio.h. * libio/iofgetpos.c: Also rename fgetpos64 out of the way. * libio/iofsetpos.c: Also rename fsetpos64 out of the way. * scripts/check-installed-headers.sh: Skip libio.h and _G_config.h.
2017-12-23getrandom: fix comment [BZ #22347]Dmitry V. Levin
* stdlib/getrandom.c (getrandom): Fix comment. * sysdeps/unix/sysv/linux/getrandom.c (getrandom): Likewise.
2017-12-22copy_file_range: New function to copy file dataFlorian Weimer
The semantics are based on the Linux system call, but a very close emulation in user space is provided.
2017-12-20Simplify tile assembly definitionsAdhemerval Zanella
With tilepro removal, the uppercase instruction are not anymore required to be defines as potentially macros. This is a mechanical change done by the following shell script: --- INSNS="LD LD4U ST ST4 BNEZ BEQZ BEQZT BGTZ CMPEQI CMPEQ CMOVEQZ CMOVNEZ" FILES=$(find sysdeps/tile sysdeps/unix/sysv/linux/tile -iname *.S) for insn in $INSNS; do repl=$(echo $insn | tr '[:upper:]' '[:lower:]') sed -i 's/\b'$insn'\b/'$repl'/g' $FILES done --- Checked with a build for tilegx-linux-gnu and tilegx-linux-gnu-32 with and without the patch, there is no difference in generated binary with a dissassemble. * sysdeps/tile/__longjmp.S (__longjmp): Use lowercase instructions. * sysdeps/tile/__tls_get_addr.S (__tls_get_addr): Likewise. * sysdeps/tile/_mcount.S (__mcount): Likewise. * sysdeps/tile/crti.S (_init, _fini): Likewise. * sysdeps/tile/crtn.S: Likewise. * sysdeps/tile/dl-start.S (_start): Likewise. * sysdeps/tile/dl-trampoline.S: Likewise. * sysdeps/tile/setjmp.S (__sigsetjmp): Likewise. * sysdeps/tile/start.S (_start): Likewise. * sysdeps/unix/sysv/linux/tile/clone.S (_clone): Likewise. * sysdeps/unix/sysv/linux/tile/getcontext.S (__getcontext): Likewise. * sysdeps/unix/sysv/linux/tile/ioctl.S (__ioctl): Likewise. * sysdeps/unix/sysv/linux/tile/setcontext.S (__setcontext): Likewise. * sysdeps/unix/sysv/linux/tile/swapcontext.S (__swapcontext): Likewise. * sysdeps/unix/sysv/linux/tile/syscall.S (syscall): Likewise. * sysdeps/unix/sysv/linux/tile/vfork.S (__vfork): Likewise.
2017-12-20Simplify tilegx sysdeps folderAdhemerval Zanella
With tilepro support removal we can now simplify internal tile support by moving the directory structure to avoid the unnecessary directory levels in tile/tilegx both on generic and linux folders. Checked with a build for tilegx-linux-gnu and tilegx-linux-gnu-32 with and without the patch, there is no difference in generated binary with a dissassemble. * stdlib/bug-getcontext.c (do_test): Remove tilepro mention in comment. * sysdeps/tile/preconfigure: Remove tilegx folder. * sysdeps/tile/tilegx/Implies: Move definitions to ... * sysdeps/tile/Implies: ... here. * sysdeps/tile/tilegx/Makefile: Move rules to ... * sysdeps/tile/Makefile: ... here. * sysdeps/tile/tilegx/atomic-machine.h: Move definitions to ... * sysdeps/tile/atomic-machine.h: ... here. Add include guards. * sysdeps/tile/tilegx/bits/wordsize.h: Move to ... * sysdeps/tile/bits/wordsize.h: ... here. * sysdeps/tile/tilegx/*: Move to ... * sysdeps/tile/*: ... here. * sysdeps/tile/tilegx/tilegx32/Implies: Move to ... * sysdeps/tile/tilegx32/Implies: ... here. * sysdeps/tile/tilegx/tilegx64/Implies: Move to ... * sysdeps/tile/tilegx64/Implies: ... here. * sysdeps/unix/sysv/linux/tile/tilegx/Makefile: Move definitions to ... * sysdeps/unix/sysv/linux/tile/Makefile: ... here. * sysdeps/unix/sysv/linux/tile/tilegx/*: Move to ... * sysdeps/unix/sysv/linux/tile/*: ... here. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/*: Move to ... * sysdeps/unix/sysv/linux/tile/tilegx32/*: ... here. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/*: Move to ... * sysdeps/unix/sysv/linux/tile/tilegx64/*: ... here.
2017-12-20Remove tilepro-*-linux-gnu supportAdhemerval Zanella
As from previous discussions [1] this patch removes tileprox-*-linux-gnu support from GLIBC. This patch is a straigthfoward one, which just remove tilepro specific implementation and configurations (no sysdep simplfication or reorganization is done). * README: Remove tilepro-*-linux-gnu from supported architecture. * scripts/build-many-glibcs.py: Likewise. * sysdeps/tile/__tls_get_addr.S (__tls_get_addr): Likewise. * sysdeps/tile/crti.S (PREINIT_FUNCTION): Likewise. * sysdeps/tile/dl-machine.h (ELF_MACHINE_NAME, elf_machine_matches_host, elf_machine_dynamic, elf_machine_load_address, elf_machine_runtime_setup, reloc_howto howto, elf_machine_rela): Likewise * sysdeps/tile/dl-start.S (_start): Likewise. * sysdeps/tile/memcmp.c (DBLALIGN, REVBYTES): Likewise. * sysdeps/tile/memcopy.h (MEMCPY_OK_FOR_FWD_MEMMOVE, MEMCPY_OK_FOR_FWD_MEMMOVE, op_t): Likewise. * sysdeps/tile/nptl/pthread_spin_lock.c (TNS, CMPTNS): Likewise. * sysdeps/tile/nptl/pthread_spin_trylock.c (TNS): Likewise. * sysdeps/tile/nptl/pthread_spin_unlock.c (pthread_spin_unlock): Likewise. * sysdeps/tile/nptl/tls.h (DB_THREAD_SELF): Likewise. * sysdeps/tile/preconfigure: Likewise. * sysdeps/tile/stackguard-macros.h (STACK_CHK_GUARD, POINTER_CHK_GUARD): Likewise. * sysdeps/tile/stackinfo.h (__stackinfo_sub): Likewise. * sysdeps/tile/start.S (_start): Likewise. * sysdeps/tile/tls-macros.h (TLS_GD_OFFSET, TLS_IE_OFFSET, _TLS_LE): Likewise. * sysdeps/tile/sysdep.h (REGSIZE): Likewise. (LD, LD4U, ST, ST4, BNEZ, BEQZ, BEQZT, BGTZ, CMPEQI, CMPEQ, CMOVEQZ, CMOVNEZ): Remove. * sysdeps/unix/sysv/linux/tile/bits/environments.h (__ILP32_OFF32_CFLAGS, __ILP32_OFFBIG_CFLAGS, __ILP32_OFF32_LDFLAGS, __ILP32_OFFBIG_LDFLAGS, __LP64_OFF64_CFLAGS, __LP64_OFF64_LDFLAGS): Likewise. * sysdeps/tile/wordcopy.c (DBLALIGN): Likewise. * sysdeps/tile/tilepro/Implies: Remove file. * sysdeps/tile/tilepro/atomic-machine.h: Likewise. * sysdeps/tile/tilepro/bits/wordsize.h: Likewise. * sysdeps/tile/tilepro/memchr.c: Likewise. * sysdeps/tile/tilepro/memcpy.S: Likewise. * sysdeps/tile/tilepro/memset.c: Likewise. * sysdeps/tile/tilepro/memusage.h: Likewise. * sysdeps/tile/tilepro/rawmemchr.c: Likewise. * sysdeps/tile/tilepro/strchr.c: Likewise. * sysdeps/tile/tilepro/strchrnul.c: Likewise. * sysdeps/tile/tilepro/strlen.c: Likewise. * sysdeps/tile/tilepro/strrchr.c: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/Implies: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/c++-types.data: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/ld.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/ldconfig.h: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libBrokenLocale.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libanl.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libcrypt.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libdl.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libnsl.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libpthread.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libresolv.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/librt.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libthread_db.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libutil.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/register-dump.h: Likewise. * sysdeps/unix/sysv/linux/tile/sysconf.c (linux_sysconf): Remove tilepro mention in comment. [1] https://sourceware.org/ml/libc-alpha/2017-12/msg00038.html
2017-12-20nptl: Consolidate pthread_{timed,try}join{_np}Adhemerval Zanella
This patch consolidates the pthread_join and gnu extensions to avoid code duplication. The function pthread_join, pthread_tryjoin_np, and pthread_timedjoin_np are now based on pthread_timedjoin_ex. It also fixes some inconsistencies on ESRCH, EINVAL, EDEADLK handling (where each implementation differs from each other) and also on clenup handler (which now always use a CAS). Checked on i686-linux-gnu and x86_64-linux-gnu. * nptl/pthreadP.h (__pthread_timedjoin_np): Define. * nptl/pthread_join.c (pthread_join): Use __pthread_timedjoin_np. * nptl/pthread_tryjoin.c (pthread_tryjoin): Likewise. * nptl/pthread_timedjoin.c (cleanup): Use CAS on argument setting. (pthread_timedjoin_np): Define internal symbol and common code from pthread_join. * sysdeps/unix/sysv/linux/i386/lowlevellock.h (__lll_timedwait_tid): Remove superflous checks. * sysdeps/unix/sysv/linux/x86_64/lowlevellock.h (__lll_timedwait_tid): Likewise. Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2017-12-19sh: Fix clone exit return code (BZ #22605)Adhemerval Zanella
Since 3f823e87cc (Call exit directly in clone (BZ #21512)) SH clone implementation fails to set the exit code resulting in the failures: FAIL: nptl/tst-align-clone FAIL: nptl/tst-getpid1 This patch fixes the both testcases. [BZ #22605] * sysdeps/unix/sysv/linux/sh/clone.S (__clone): Fix exit return code. Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2017-12-19Linux/x86: Update cancel_jmp_buf to match __jmp_buf_tag [BZ #22563]H.J. Lu
On x86, padding in struct __jmp_buf_tag is used for shadow stack pointer to support shadow stack in Intel Control-flow Enforcemen Technology. Since the cancel_jmp_buf array is passed to setjmp and longjmp by casting it to pointer to struct __jmp_buf_tag, it should be as large as struct __jmp_buf_tag. Otherwise when shadow stack is enabled, setjmp and longjmp will write and read beyond cancel_jmp_buf when saving and restoring shadow stack pointer. This patch adds bits/types/__cancel_jmp_buf_tag.h to define struct __cancel_jmp_buf_tag so that Linux/x86 can add saved_mask to cancel_jmp_buf. Tested natively on i386, x86_64 and x32. Tested hppa-linux-gnu with build-many-glibcs.py. [BZ #22563] * bits/types/__cancel_jmp_buf_tag.h: New file. * sysdeps/unix/sysv/linux/x86/bits/types/__cancel_jmp_buf_tag.h * sysdeps/unix/sysv/linux/x86/pthreaddef.h: Likewise. * sysdeps/unix/sysv/linux/x86/nptl/pthreadP.h: Likewise. * nptl/Makefile (headers): Add bits/types/__cancel_jmp_buf_tag.h. * nptl/descr.h [NEED_SAVED_MASK_IN_CANCEL_JMP_BUF] (pthread_unwind_buf): Add saved_mask to cancel_jmp_buf. * sysdeps/nptl/pthread.h: Include <bits/types/__cancel_jmp_buf_tag.h>. (__pthread_unwind_buf_t): Use struct __cancel_jmp_buf_tag with __cancel_jmp_buf. * sysdeps/unix/sysv/linux/hppa/pthread.h: Likewise.
2017-12-12ia64: Add ipc_priv.h header to set __IPC_64 to zeroJames Clarke
When running strace, IPC_64 was set in the command, but ia64 is an architecture where CONFIG_ARCH_WANT_IPC_PARSE_VERSION *isn't* set in the kernel, so ipc_parse_version just returns IPC_64 without clearing the IPC_64 bit in the command. * sysdeps/unix/sysv/linux/ia64/ipc_priv.h: New file defining __IPC_64 to 0 to avoid IPC_64 being set. Signed-off-by: James Clarke <jrtc27@jrtc27.com>
2017-12-07Add _Float32 function aliases.Joseph Myers
This patch concludes filling out TS 18661-3 support for different types by adding *f32 function aliases of float functions to support _Float32. As with _Float64 and _Float32x, this is supported for all glibc configurations. As with the previous such patches there are some x86 ulps updates because of inline functions present for float but not for _Float32. The patch also has the usual bits/floatn-common.h update, symbol versions, ABI baselines updates, test enablement and documentation. Tested for x86_64 and x86, and with build-many-glibcs.py, with both GCC 6 and GCC 7. * bits/floatn-common.h (__HAVE_FLOAT32): Define to 1. * manual/math.texi (Mathematics): Document support for _Float32. * math/Makefile (test-types): Add float32. * math/Versions (GLIBC_2.27): Add _Float32 functions. * stdlib/Versions (GLIBC_2.27): Likewise. * wcsmbs/Versions (GLIBC_2.27): Likewise. * sysdeps/unix/sysv/linux/aarch64/libc.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.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/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.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/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise. * sysdeps/i386/fpu/libm-test-ulps: Likewise. * sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
2017-12-06Add _Float64, _Float32x function aliases.Joseph Myers
This patch continues filling out TS 18661-3 support by adding *f64 and *f32x function aliases, supporting _Float64 and _Float32x, as aliases for double functions. These types are supported for all glibc configurations. The API corresponds exactly to that for _Float128 and _Float64x. _Float32 aliases to float functions remain to be added in subsequent patches to complete this process (then there are a few miscellaneous functions in TS 18661-3 to implement that aren't simply versions of existing functions for new types). The patch enables the feature in bits/floatn-common.h, adds symbol versions and documentation with updates to ABI baselines, and arranges for the libm functions for the new types to be tested. As with the _Float64x changes there are some x86 ulps updates because of header inlines not used for the new types (and one other change to the non-multiarch libm-test-ulps, which I suppose comes from using a different compiler version / configuration from when it was last regenerated). Tested for x86_64 and x86, and with build-many-glibcs.py, with both GCC 6 and GCC 7. * bits/floatn-common.h (__HAVE_FLOAT64): Define to 1. (__HAVE_FLOAT32X): Likewise. * manual/math.texi (Mathematics): Document support for _Float64 and _Float32x. * math/Makefile (test-types): Add float64 and float32x. * math/Versions (GLIBC_2.27): Add _Float64 and _Float32x functions. * stdlib/Versions (GLIBC_2.27): Likewise. * wcsmbs/Versions (GLIBC_2.27): Likewise. * sysdeps/unix/sysv/linux/aarch64/libc.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.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/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.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/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise. * sysdeps/i386/fpu/libm-test-ulps: Likewise. * sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
2017-12-05Add elision tunablesRogerio Alves
This patch adds several new tunables to control the behavior of elision on supported platforms[1]. Since elision now depends on tunables, we should always *compile* with elision enabled, and leave the code disabled, but available for runtime selection. This gives us *much* better compile-time testing of the existing code to avoid bit-rot[2]. Tested on ppc, ppc64, ppc64le, s390x and x86_64. [1] This part of the patch was initially proposed by Paul Murphy but was "staled" because the framework have changed since the patch was originally proposed: https://patchwork.sourceware.org/patch/10342/ [2] This part of the patch was inititally proposed as a RFC by Carlos O'Donnell. Make sense to me integrate this on the patch: https://sourceware.org/ml/libc-alpha/2017-05/msg00335.html * elf/dl-tunables.list: Add elision parameters. * manual/tunables.texi: Add entries about elision tunable. * sysdeps/unix/sysv/linux/powerpc/elision-conf.c: Add callback functions to dynamically enable/disable elision. Add multiple callbacks functions to set elision parameters. Deleted __libc_enable_secure check. * sysdeps/unix/sysv/linux/s390/elision-conf.c: Likewise. * sysdeps/unix/sysv/linux/x86/elision-conf.c: Likewise. * configure: Regenerated. * configure.ac: Option enable_lock_elision was deleted. * config.h.in: ENABLE_LOCK_ELISION flag was deleted. * config.make.in: Remove references to enable_lock_elision. * manual/install.texi: Elision configure option was removed. * INSTALL: Regenerated to remove enable_lock_elision. * nptl/Makefile: Disable elision so it can verify error case for destroying a mutex. * sysdeps/powerpc/nptl/elide.h: Cleanup ENABLE_LOCK_ELISION check. Deleted macros for the case when ENABLE_LOCK_ELISION was not defined. * sysdeps/s390/configure: Regenerated. * sysdeps/s390/configure.ac: Remove references to enable_lock_elision.. * nptl/tst-mutex8.c: Deleted all #ifndef ENABLE_LOCK_ELISION from the test. * sysdeps/powerpc/powerpc32/sysdep.h: Deleted all ENABLE_LOCK_ELISION checks. * sysdeps/powerpc/powerpc64/sysdep.h: Likewise. * sysdeps/powerpc/sysdep.h: Likewise. * sysdeps/s390/nptl/bits/pthreadtypes-arch.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/force-elision.h: Likewise. * sysdeps/unix/sysv/linux/s390/elision-conf.h: Likewise. * sysdeps/unix/sysv/linux/s390/force-elision.h: Likewise. * sysdeps/unix/sysv/linux/s390/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/s390/Makefile: Remove references to enable-lock-elision. Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>
2017-12-05Linux: Implement interfaces for memory protection keysFlorian Weimer
This adds system call wrappers for pkey_alloc, pkey_free, pkey_mprotect, and x86-64 implementations of pkey_get and pkey_set, which abstract over the PKRU CPU register and hide the actual number of memory protection keys supported by the CPU. pkey_mprotect with a -1 key is implemented using mprotect, so it will work even if the kernel does not support the pkey_mprotect system call. The system call wrapers use unsigned int instead of unsigned long for parameters, so that no special treatment for x32 is needed. The flags argument is currently unused, and the access rights bit mask is limited to two bits by the current PKRU register layout anyway. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2017-12-04S390: Fix backtrace in vdso functions.Stefan Liebler
On s390, GDB fails to show the complete backtrace from within vdso functions. The macro INTERNAL_VSYSCALL_CALL saves the return address in r14 to r10 before branching to the vdso function. The branch-instruction updates r14 in order to let the vdso function return. Then the original address in r14 is restored from r10. Unfortunately, there are no cfi-rules and GDB fails. Furthermore the call of the vdso function does not comply with the s390 ABI as no stack-frame for the vdso-function is generated. This patch removes the s390 specific macro INTERNAL_VSYSCALL_CALL and the common implementation in sysdeps/unix/sysv/linux/sysdep-vdso.h is used. Then the vdso function is called via function-pointer and GCC generates a new stack-frame and emits all needed cfi-rules. The defines CLOBBER_[0-6] are removed as they were only used in macro INTERNAL_VSYSCALL_CALL. The macro INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK is not used on s390. The only user is power. Thus it is removed from s390 sysdep.h. ChangeLog: * sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h (INTERNAL_VSYSCALL_CALL, CLOBBER_0, CLOBBER_1, CLOBBER_2, CLOBBER_3, CLOBBER_4, CLOBBER_5, CLOBBER_6, INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK): Remove. * sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h: Likewise.
2017-12-01x32: Remove unused getcpu implementationAdhemerval Zanella
Checked on x86_64-linux-gnu-x32. * sysdeps/unix/sysv/linux/x86_64/x32/getcpu.c: Remove file. Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2017-11-30x86: Make a space in jmpbuf for shadow stack pointerH.J. Lu
To support Shadow Stack (SHSTK) in Intel Control-flow Enforcement Technology (CET) in setjmp/longjmp, we need to save shadow stack pointer in jmp_buf. The __saved_mask field in jmp_buf has type of __sigset_t. On Linux, __sigset_t is defined as #define _SIGSET_NWORDS (1024 / (8 * sizeof (unsigned long int))) typedef struct { unsigned long int __val[_SIGSET_NWORDS]; } __sigset_t; which is much bigger than expected by the __sigprocmask system call, which has typedef struct { unsigned long sig[_NSIG_WORDS]; } sigset_t; For Linux/x86, we can shrink __sigset_t used by __saved_mask in jmp_buf to add paddings for shadow stack pointer. As long as the new __sigset_t is not smaller than sigset_t expected by the __sigprocmask system call, it should work correctly. This patch adds an internal header file, <setjmpP.h>, to define __jmp_buf_sigset_t for __saved_mask in jmp_buf for Linux/x86 with a space to store shadow stack pointer. It verifies __jmp_buf_sigset_t has the suitable size for the __sigprocmask system call. A run-time test, tst-saved_mask-1.c, is added to verify that size of __jmp_buf_sigset_t is sufficient. If its size is too small, the test fails with rt_sigprocmask(SIG_SETMASK, strace: umoven: short read (4 < 8) @0x7fa8aa28effc 0x7fa8aa28effc, NULL, 8) = -1 EFAULT (Bad address) rt_sigprocmask(SIG_SETMASK, strace: umoven: short read (4 < 8) @0x7fa8aa28effc 0x7fa8aa28effc, NULL, 8) = -1 EFAULT (Bad address) rt_sigprocmask(SIG_SETMASK, NULL, 0x7fa8aa28effc, 8) = -1 EFAULT (Bad address) exit_group(1) = ? Tested with build-many-glibcs.py. * debug/longjmp_chk.c: Include <setjmpP.h> instead of <setjmp.h>. * setjmp/longjmp.c: Include <setjmpP.h> instead of <setjmp.h>. (__libc_siglongjmp): Cast &env[0].__saved_mask to "sigset_t *". * setjmp/sigjmp.c: Include <setjmpP.h> instead of <setjmp.h>. (__sigjmp_save): Cast &env[0].__saved_mask to "sigset_t *". * sysdeps/generic/setjmpP.h: New file. * sysdeps/unix/sysv/linux/x86/jmp_buf-ssp.sym: Likewise. * sysdeps/unix/sysv/linux/x86/setjmpP.h: Likewise. * sysdeps/unix/sysv/linux/x86/tst-saved_mask-1.c: Likewise. * sysdeps/unix/sysv/linux/x86/Makefile (gen-as-const-headers): Add jmp_buf-ssp.sym. (tests): Add tst-saved_mask-1.
2017-11-28Use libm_alias_double for s390.Joseph Myers
Continuing the preparation for additional _FloatN / _FloatNx function aliases, this patch makes s390 libm function implementations use libm_alias_double to define function aliases. This allows sysdeps/unix/sysv/linux/s390/fpu/s_fma.c to be removed, as libm_alias_double handles symbol versioning for long double compat symbols. Tested with build-many-glibcs.py for s390-linux-gnu and s390x-linux-gnu that installed stripped shared libraries are unchanged by the patch. * sysdeps/s390/fpu/s_fma.c: Include <libm-alias-double.h>. [!__fma] (fma): Define using libm_alias_double. * sysdeps/unix/sysv/linux/s390/fpu/s_fma.c: Remove.
2017-11-27Implement the mlock2 functionFlorian Weimer
Fallback using mlock is provided if the flags argument is zero. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2017-11-27Add _Float64x function aliases.Joseph Myers
This patch continues filling out TS 18661-3 support by adding *f64x function aliases on platforms with _Float64x support. (It so happens the set of such platforms is exactly the same as the set of platforms with _Float128 support, although on x86_64, x86 and ia32 the _Float64x format is Intel extended rather than binary128.) The API provided corresponds exactly to that provided for _Float128, mostly coming from TS 18661-3. As these functions always alias those for another type (long double, _Float128 or both), __* function names are not provided, as in other cases of alias types. Given the preparation done in previous patches, this one just enables the feature via Makeconfig and bits/floatn.h, adds symbol versions, and updates documentation and ABI baselines. The symbol versions are present unconditionally as GLIBC_2.27 in the relevant Versions files, as it's OK for those to specify versions for functions that may not be present in some configurations; no additional complexity is needed unless in future some configuration gains support for this type that didn't have such support in 2.27. The Makeconfig additions for ia64 and x86 aren't strictly needed, as those configurations also get float64x-alias-fcts definitions from sysdeps/ieee754/float128/Makeconfig, but still seem appropriate given that _Float64x is not _Float128 for those configurations. A libm-test-ulps update for x86 is included. This is because bits/mathinline.h does not have _Float64x support added and for two functions the use of out-of-line functions results in increased ulps (ifloat64x shares ulps with ildouble / ifloat128 as appropriate). Given that we'd like generally to eliminate bits/mathinline.h optimizations, preferring to have such optimizations in GCC instead, it seems reasonable not to add such support there for new types. GCC support for _FloatN / _FloatNx built-in functions is limited, but has been improved in GCC 8, and at some point I hope the full set of libm built-in functions in GCC, and other optimizations with per-floating-type aspects, will be enabled for all _FloatN / _FloatNx types. Tested for x86_64 and x86, and with build-many-glibcs.py, with both GCC 6 and GCC 7. * sysdeps/ia64/Makeconfig (float64x-alias-fcts): New variable. * sysdeps/ieee754/float128/Makeconfig (float64x-alias-fcts): Likewise. * sysdeps/ieee754/ldbl-128/Makeconfig (float64x-alias-fcts): Likewise. * sysdeps/x86/Makeconfig: New file. * bits/floatn-common.h (__HAVE_FLOAT64X): Remove macro. (__HAVE_FLOAT64X_LONG_DOUBLE): Likewise. * bits/floatn.h (__HAVE_FLOAT64X): New macro. (__HAVE_FLOAT64X_LONG_DOUBLE): Likewise. * sysdeps/ia64/bits/floatn.h (__HAVE_FLOAT64X): Likewise. (__HAVE_FLOAT64X_LONG_DOUBLE): Likewise. * sysdeps/ieee754/ldbl-128/bits/floatn.h (__HAVE_FLOAT64X): Likewise. (__HAVE_FLOAT64X_LONG_DOUBLE): Likewise. * sysdeps/mips/ieee754/bits/floatn.h (__HAVE_FLOAT64X): Likewise. (__HAVE_FLOAT64X_LONG_DOUBLE): Likewise. * sysdeps/powerpc/bits/floatn.h (__HAVE_FLOAT64X): Likewise. (__HAVE_FLOAT64X_LONG_DOUBLE): Likewise. * sysdeps/x86/bits/floatn.h (__HAVE_FLOAT64X): Likewise. (__HAVE_FLOAT64X_LONG_DOUBLE): Likewise. * manual/math.texi (Mathematics): Document support for _Float64x. * math/Versions (GLIBC_2.27): Add _Float64x functions. * stdlib/Versions (GLIBC_2.27): Likewise. * wcsmbs/Versions (GLIBC_2.27): Likewise. * sysdeps/unix/sysv/linux/aarch64/libc.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.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/powerpc64/libc-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise. * sysdeps/i386/fpu/libm-test-ulps: Likewise. * sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
2017-11-24Linux: Introduce <bits/mman-shared.h>Florian Weimer
This header file enables sharing of portable declarations and definitions across all Linux architectures, including hppa (which does not use <bits/mman-linux.h>). Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2017-11-23sigwait: Do not fail with EINTR and return error code [BZ #22478]Florian Weimer
Since commit 8b0e795aaa445e9167aa07b282c5720b35342c07 Author: Adhemerval Zanella <adhemerval.zanella@linaro.org> Date: Wed Nov 1 11:49:05 2017 -0200 Simplify Linux sig{timed}wait{info} implementations sigwait can fail with EINTR. Applications do not expect that, and the error code is not documented in POSIX or the manual pages. This commit restores the previous behavior by retrying the system call on EINTR. It also returns the error code, not -1, on the remaing errors. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2017-11-23Linux: Add memfd_create system call wrapperFlorian Weimer
The system call is somewhat obscure because it is closely related to file descriptor sealing. However, it is also the recommended way to create alias mappings, which is why it has more general use. No emulation is provided. Except for the name of the /proc/self/fd links, it would be possible to implement an approximation using O_TMPFILE and tmpfs, but this does not appear to be worth the added complexity. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Christian Brauner <christian.brauner@ubuntu.com>
2017-11-21Update hppa bits/mman.h from Linux 4.14.Joseph Myers
This patch updates the hppa bits/mman.h based on Linux 4.14. Some MADV_* macros are removed in Linux 4.14 as unused/unimplemented, so this patch removes them from glibc, while adding two new macros added in Linux 4.14. Tested (compilation only) for hppa with build-many-glibcs.py. * sysdeps/unix/sysv/linux/hppa/bits/mman.h [__USE_MISC] (MADV_SPACEAVAIL): Remove macro. [__USE_MISC] (MADV_VPS_PURGE): Likewise. [__USE_MISC] (MADV_VPS_INHERIT): Likewise. [__USE_MISC] (MADV_HWPOISON): New macro. [__USE_MISC] (MADV_SOFT_OFFLINE): Likewise.
2017-11-21S390: Add cfi information for start routines in order to stop unwinding.Stefan Liebler
GDB failed to detect the outermost frame while showing the backtrace within a thread: Backtrace stopped: previous frame identical to this frame (corrupt stack?) Before this patch, the start routines like thread_start had no cfi information. GDB is then using the prologue unwinder if no cfi information is available. This unwinder tries to unwind r15 and stops e.g. if r15 was updated or on some jump-instructions. On older glibc-versions (before commit "Remove cached PID/TID in clone" c579f48edba88380635ab98cb612030e3ed8691e), the thread_start function used such a jump-instruction and GDB did not fail with an error. This patch adds cfi information for _start, thread_start and __makecontext_ret and marks r14 as undefined which marks the frame as outermost frame and GDB stops the backtrace. Also tested different gcc versions in order to test _Unwind_Backtrace() in libgcc as this is used by backtrace() in glibc. ChangeLog: * sysdeps/s390/s390-64/start.S (_start): Add cfi information for r14. * sysdeps/s390/s390-32/start.S: (_start): Likewise * sysdeps/unix/sysv/linux/s390/s390-64/clone.S (thread_start): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/clone.S (thread_start): Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/__makecontext_ret.S (__makecontext_ret): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S (__makecontext_ret): Likewise.
2017-11-20aarch64: Optimized memset for falkorSiddhesh Poyarekar
The generic memset reads dczid_el0 on every memset. This has a significant impact on falkor for a range of sizes because reading dczid_el0 is slow. The DZP bit in the dczid_el0 register does not change dynamically, so it is safe to read once during program startup. With this patch dczid_el0 is read once during startup and zva_size is cached. This is used to invoke the falkor-specific memset; the generic memset routine remains unchanged. The gains due to this are significant for falkor, with run time reductions as high as 48%. Here's a sample from the falkor tests: Function: memset Variant: walk simple_memset __memset_falkor __memset_generic ===================================================================== length=256, char=0: 139.96 (-698.28%) 9.07 ( 48.26%) 17.53 length=257, char=0: 140.50 (-699.03%) 9.53 ( 45.80%) 17.58 length=258, char=0: 140.96 (-703.95%) 9.58 ( 45.36%) 17.53 length=259, char=0: 141.56 (-705.16%) 9.53 ( 45.79%) 17.58 length=260, char=0: 142.15 (-710.76%) 9.57 ( 45.39%) 17.53 length=261, char=0: 142.50 (-710.39%) 9.53 ( 45.78%) 17.58 length=262, char=0: 142.97 (-715.09%) 9.57 ( 45.42%) 17.54 length=263, char=0: 143.51 (-716.18%) 9.53 ( 45.80%) 17.58 length=264, char=0: 143.93 (-720.55%) 9.58 ( 45.39%) 17.54 length=265, char=0: 144.56 (-722.07%) 9.53 ( 45.80%) 17.59 length=266, char=0: 144.98 (-726.42%) 9.58 ( 45.42%) 17.54 length=267, char=0: 145.53 (-727.53%) 9.53 ( 45.80%) 17.59 length=268, char=0: 146.25 (-731.81%) 9.53 ( 45.79%) 17.58 length=269, char=0: 146.52 (-735.39%) 9.53 ( 45.66%) 17.54 length=270, char=0: 146.97 (-735.81%) 9.53 ( 45.80%) 17.58 length=271, char=0: 147.54 (-741.08%) 9.58 ( 45.38%) 17.54 length=512, char=0: 268.26 (-1307.85%) 12.06 ( 36.71%) 19.05 length=513, char=0: 268.73 (-1273.89%) 13.56 ( 30.68%) 19.56 length=514, char=0: 269.31 (-1276.89%) 13.56 ( 30.68%) 19.56 length=515, char=0: 269.73 (-1279.05%) 13.56 ( 30.68%) 19.56 length=516, char=0: 270.34 (-1282.24%) 13.56 ( 30.67%) 19.56 length=517, char=0: 270.83 (-1284.71%) 13.56 ( 30.66%) 19.56 length=518, char=0: 271.20 (-1286.54%) 13.56 ( 30.67%) 19.56 length=519, char=0: 271.67 (-1288.67%) 13.65 ( 30.24%) 19.56 length=520, char=0: 272.14 (-1291.04%) 13.65 ( 30.22%) 19.56 length=521, char=0: 272.66 (-1293.69%) 13.65 ( 30.23%) 19.56 length=522, char=0: 273.14 (-1296.13%) 13.65 ( 30.20%) 19.56 length=523, char=0: 273.64 (-1298.75%) 13.65 ( 30.23%) 19.56 length=524, char=0: 274.34 (-1302.16%) 13.66 ( 30.20%) 19.57 length=525, char=0: 274.64 (-1297.78%) 13.56 ( 30.99%) 19.65 length=526, char=0: 275.20 (-1300.04%) 13.56 ( 31.01%) 19.66 length=527, char=0: 275.66 (-1302.86%) 13.56 ( 30.99%) 19.65 length=1024, char=0: 524.46 (-2169.75%) 20.12 ( 12.92%) 23.11 length=1025, char=0: 525.14 (-2124.63%) 21.62 ( 8.40%) 23.61 length=1026, char=0: 525.59 (-2125.36%) 21.88 ( 7.37%) 23.62 length=1027, char=0: 525.98 (-2127.14%) 21.62 ( 8.46%) 23.62 length=1028, char=0: 526.68 (-2131.10%) 21.62 ( 8.42%) 23.61 length=1029, char=0: 527.10 (-2131.70%) 21.79 ( 7.73%) 23.62 length=1030, char=0: 527.54 (-2118.51%) 21.62 ( 9.10%) 23.78 length=1031, char=0: 527.98 (-2136.37%) 21.62 ( 8.43%) 23.61 length=1032, char=0: 528.70 (-2139.38%) 21.62 ( 8.43%) 23.61 length=1033, char=0: 529.25 (-2124.37%) 21.62 ( 9.11%) 23.79 length=1034, char=0: 529.48 (-2142.95%) 21.62 ( 8.43%) 23.61 length=1035, char=0: 530.11 (-2145.13%) 21.62 ( 8.44%) 23.61 length=1036, char=0: 530.76 (-2147.10%) 21.79 ( 7.73%) 23.62 length=1037, char=0: 531.03 (-2149.45%) 21.62 ( 8.42%) 23.61 length=1038, char=0: 531.64 (-2151.87%) 21.62 ( 8.42%) 23.61 length=1039, char=0: 531.99 (-2151.63%) 21.80 ( 7.75%) 23.63 * sysdeps/aarch64/memset-reg.h: New file. * sysdeps/aarch64/memset.S: Use it. (__memset): Rename to MEMSET macro. [ZVA_MACRO]: Use zva_macro. * sysdeps/aarch64/multiarch/Makefile (sysdep_routines): Add memset_generic and memset_falkor. * sysdeps/aarch64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add memset ifuncs. * sysdeps/aarch64/multiarch/init-arch.h (INIT_ARCH): New local variable zva_size. * sysdeps/aarch64/multiarch/memset.c: New file. * sysdeps/aarch64/multiarch/memset_generic.S: New file. * sysdeps/aarch64/multiarch/memset_falkor.S: New file. * sysdeps/aarch64/multiarch/rtld-memset.S: New file. * sysdeps/unix/sysv/linux/aarch64/cpu-features.c (DCZID_DZP_MASK): New macro. (DCZID_BS_MASK): Likewise. (init_cpu_features): Read and set zva_size. * sysdeps/unix/sysv/linux/aarch64/cpu-features.h (struct cpu_features): New member zva_size.
2017-11-18tst-ttyname: Fix namespace setup for FedoraFlorian Weimer
On Fedora, the previous initialization sequence did not work and resulted in failures like: info: entering chroot 1 info: testcase: basic smoketest info: ttyname: PASS {name="/dev/pts/5", errno=0} info: ttyname_r: PASS {name="/dev/pts/5", ret=0, errno=0} error: ../sysdeps/unix/sysv/linux/tst-ttyname.c:122: write (setroups, "deny"): Operation not permitted info: entering chroot 2 error: ../sysdeps/unix/sysv/linux/tst-ttyname.c:122: write (setroups, "deny"): Operation not permitted error: 2 test failures Reviewed-by: Christian Brauner <christian.brauner@ubuntu.com>
2017-11-17Add AArch64 HWCAP_DCPOP from Linux 4.14.Joseph Myers
This patch adds the HWCAP_DCPOP macro from Linux 4.14 to the AArch64 bits/hwcap.h. Tested (compilation only) for aarch64 with build-many-glibcs.py. * sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h (HWCAP_DCPOP): New macro.
2017-11-16Add Linux 4.14 ARPHRD_RAWIP to net/if_arp.h.Joseph Myers
This patch adds ARPHRD_RAWIP from Linux 4.14 to the Linux net/if_arp.h. Tested for x86_64. * sysdeps/unix/sysv/linux/net/if_arp.h (ARPHRD_RAWIP): New macro.
2017-11-16Update kernel version in syscall-names.list to 4.14.Joseph Myers
Linux 4.14 does not add any new syscalls; this patch updates the version number in syscall-names.list to reflect that it's still current for 4.14. Tested for x86_64 (compilation with build-many-glibcs.py, using Linux 4.14). * sysdeps/unix/sysv/linux/syscall-names.list: Update kernel version to 4.14.
2017-11-15The -Wstringop-truncation option new in GCC 8 detects common misusesMartin Sebor
of the strncat and strncpy function that may result in truncating the copied string before the terminating NUL. To avoid false positive warnings for correct code that intentionally creates sequences of characters that aren't guaranteed to be NUL-terminated, arrays that are intended to store such sequences should be decorated with a new nonstring attribute. This change add this attribute to Glibc and uses it to suppress such false positives. ChangeLog: * misc/sys/cdefs.h (__attribute_nonstring__): New macro. * sysdeps/gnu/bits/utmp.h (struct utmp): Use it. * sysdeps/unix/sysv/linux/s390/bits/utmp.h (struct utmp): Same.
2017-11-15linux ttyname{_r}: Add testsLuke Shumaker
Add a new tst-ttyname test that includes several named sub-testcases. This patch is ordered after the patches with the fixes that it tests for (to avoid breaking `git bisect`), but for reference, here's how each relevant change so far affected the testcases in this commit, starting with 15e9a4f378c8607c2ae1aa465436af4321db0e23: | | before | | make checks | don't | | | 15e9a4f | 15e9a4f | consistent | bail | |---------------------------------+---------+---------+-------------+-------| | basic smoketest | PASS | PASS | PASS | PASS | | no conflict, no match | PASS[1] | PASS | PASS | PASS | | no conflict, console | PASS | FAIL! | FAIL | PASS! | | conflict, no match | FAIL | PASS! | PASS | PASS | | conflict, console | FAIL | FAIL | FAIL | PASS! | | with readlink target | PASS | PASS | PASS | PASS | | with readlink trap; fallback | FAIL | FAIL | FAIL | PASS! | | with readlink trap; no fallback | FAIL | PASS! | PASS | PASS | | with search-path trap | FAIL | FAIL | PASS! | PASS | |---------------------------------+---------+---------+-------------+-------| | | 4/9 | 5/9 | 6/9 | 9/9 | [1]: 15e9a4f introduced a semantic that, under certain failure conditions, ttyname sets errno=ENODEV, where previously it didn't set errno; it's not quite fair to hold "before 15e9a4f" ttyname to those new semantics. This testcase actually fails, but would have passed if we tested for the old the semantics. Each of the failing tests before 15e9a4f are all essentially the same bug: that it returns a PTY slave with the correct minor device number, but from the wrong devpts filesystem instance. 15e9a4f sought to fix this, but missed several of the cases that can cause this to happen, and also broke the case where both the erroneous PTY and the correct PTY exist. Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
2017-11-15linux ttyname{_r}: Don't bail prematurely [BZ #22145]Luke Shumaker
Commit 15e9a4f378c8607c2ae1aa465436af4321db0e23 introduced logic for ttyname() sending back ENODEV to signal that we can't get a name for the TTY because we inherited it from a different mount namespace. However, just because we inherited it from a different mount namespace and it isn't available at its original path, doesn't mean that its name is unknowable; we can still try to find it by allowing the normal fall back on iterating through devices. An example scenario where this happens is with "/dev/console" in containers. It's a common practice among container managers to allocate a PTY master/slave pair in the host's mount namespace (the slave having a path like "/dev/pty/$X"), bind mount the slave to "/dev/console" in the container's mount namespace, and send the slave FD to a process in the container. Inside of the container, the slave-end isn't available at its original path ("/dev/pts/$X"), since the container mount namespace has a separate devpts instance from the host (that path may or may not exist in the container; if it does exist, it's not the same PTY slave device). Currently ttyname{_r} sees that the file at the original "/dev/pts/$X" path doesn't match the FD passed to it, and fails early and gives up, even though if it kept searching it would find the TTY at "/dev/console". Fix that; don't have the ENODEV path force an early return inhibiting the fall-back search. This change is based on the previous patch that adds use of is_mytty in getttyname and getttyname_r. Without that change, this effectively reverts 15e9a4f, which made us disregard the false similarity of file pointed to by "/proc/self/fd/$Y", because if it doesn't bail prematurely then that file ("/dev/pts/$X") will just come up again anyway in the fall-back search. Reviewed-by: Christian Brauner <christian.brauner@ubuntu.com>
2017-11-15linux ttyname{_r}: Make tty checks consistentLuke Shumaker
In the ttyname and ttyname_r routines on Linux, at several points it needs to check if a given TTY is the TTY we are looking for. It used to be that this check was (to see if `maybe` is `mytty`): __xstat64(_STAT_VER, maybe_filename, &maybe) == 0 #ifdef _STATBUF_ST_RDEV && S_ISCHR(maybe.st_mode) && maybe.st_rdev == mytty.st_rdev #else && maybe.st_ino == mytty.st_ino && maybe.st_dev == mytty.st_dev #endif This check appears in several places. Then, one of the changes made in commit 15e9a4f378c8607c2ae1aa465436af4321db0e23 was to change that check to: __xstat64(_STAT_VER, maybe_filename, &maybe) == 0 #ifdef _STATBUF_ST_RDEV && S_ISCHR(maybe.st_mode) && maybe.st_rdev == mytty.st_rdev #endif && maybe.st_ino == mytty.st_ino && maybe.st_dev == mytty.st_dev That is, it made the st_ino and st_dev parts of the check happen even if we have the st_rdev member. This is an important change, because the kernel allows multiple devpts filesystem instances to be created; a device file in one devpts instance may share the same st_rdev with a file in another devpts instance, but they aren't the same file. This check appears twice in each file (ttyname.c and ttyname_r.c), once (in ttyname and __ttyname_r) to check if a candidate file found by inspecting /proc is the desired TTY, and once (in getttyname and getttyname_r) to check if a candidate file found by searching /dev is the desired TTY. However, 15e9a4f only updated the checks for files found via /proc; but the concern about collisions between devpts instances is just as valid for files found via /dev. So, update all 4 occurrences the check to be consistent with the version of the check introduced in 15e9a4f. Make it easy to keep all 4 occurrences of the check consistent by pulling it in to a static inline function, is_mytty. Reviewed-by: Christian Brauner <christian.brauner@ubuntu.com>
2017-11-15linux ttyname: Change return type of is_pty from int to boolLuke Shumaker
is_pty returning a bool is fine since there's no possible outcome other than true or false, and bool is used throughout the codebase. Reviewed-by: Christian Brauner <christian.brauner@ubuntu.com>
2017-11-15linux ttyname: Update a reference to kernel docs for kernel 4.10Luke Shumaker
Linux 4.10 moved many of the documentation files around. 4.10 came out between the time the patch adding the comment (commit 15e9a4f378c8607c2ae1aa465436af4321db0e23) was submitted and the time it was applied (in February, January, and March 2017; respectively). Reviewed-by: Christian Brauner <christian.brauner@ubuntu.com>
2017-11-15Add MSG_ZEROCOPY from Linux 4.14 to bits/socket.h.Joseph Myers
This patch adds the new MSG_ZEROCOPY constant from Linux 4.14 to the Linux bits/socket.h. Tested for x86_64. * sysdeps/unix/sysv/linux/bits/socket.h (MSG_ZEROCOPY): New enum constant and macro.
2017-11-15Add MADV_WIPEONFORK, MADV_KEEPONFORK from Linux 4.14.Joseph Myers
This patch adds the new MADV_WIPEONFORK and MADV_KEEPONFORK from Linux 4.14 to bits/mman-linux.h (and bits/mman.h in the hppa case). Note there are further hppa MADV_* changes in 4.14; I plan a separate glibc patch for those. Tested for x86_64. * sysdeps/unix/sysv/linux/bits/mman-linux.h [__USE_MISC] (MADV_WIPEONFORK): New macro. [__USE_MISC] (MADV_KEEPONFORK): Likewise. * sysdeps/unix/sysv/linux/hppa/bits/mman.h [__USE_MISC] (MADV_WIPEONFORK): Likewise. [__USE_MISC] (MADV_KEEPONFORK): Likewise.
2017-11-15Check length of ifname before copying it into to ifreq structure.Steve Ellcey
[BZ #22442] * sysdeps/unix/sysv/linux/if_index.c (__if_nametoindex): Check if ifname is too long.
2017-11-15linux: Include <sysdep-cancel.h> for epoll_waitLuke Shumaker
The epoll_wait wrapper uses the raw syscall if __NR_epoll_wait is defined, and falls back to calling epoll_pwait(..., NULL) if it isn't defined. However, it didn't include the appropriate headers for __NR_epoll_wait to be defined, so it was *always* falling back to calling epoll_pwait! This mistake was introduced in b62c3815912bc679a966134affdedd3f35ae8621, when epoll_wait changed from being in syscalls.list to always having a C wrapper. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2017-11-09Add jmp_buf-macros.hH.J. Lu
Verify that sizes, alignments and field offsets of jmp_buf as well as sigjmp_buf are unchanged regardless how struct __jmp_buf_tag is defined. Since jmp_buf is target specific, jmp_buf-macros.h is added for each Linux target. A new target must provides its own jmp_buf-macros.h. TODO: Hurd needs to provide a jmp_buf-macros.h. Tested with build-many-glibcs.py. * include/setjmp.h [!_ISOMAC]: Include <stddef.h> and <jmp_buf-macros.h>. [!_ISOMAC] (STR_HELPER): New. [!_ISOMAC] (STR): Likewise. [!_ISOMAC] (TEST_SIZE): Likewise. [!_ISOMAC] (TEST_ALIGN): Likewise. [!_ISOMAC] (TEST_OFFSET): Likewise. [!_ISOMAC] Add _Static_assert to check sizes, alignments and field offsets of jmp_buf as well as sigjmp_buf. * sysdeps/unix/sysv/linux/aarch64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/alpha/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/arm/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/hppa/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/i386/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/ia64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/m68k/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/microblaze/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n32/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/nios2/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/sh/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/jmp_buf-macros.h: Likewise.
2017-11-07Move <bits/mman-linux.h> to the Linux sysdeps directoryFlorian Weimer
The header file is no longer used on anything but Linux.
2017-11-06Cleanup Linux sigqueue implementationAdhemerval Zanella
This patch simplify Linux sigqueue implementation by assuming __NR_rt_sigqueueinfo existence due minimum kernel requirement (it pre-dates Linux git inclusion for Linux 2.6.12). Checked on x86_64-linux-gnu. * sysdeps/unix/sysv/linux/sigqueue.c (__sigqueue): Asssume __NR_rt_sigqueueinfo. Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Zack Weinberg <zackw@panix.com>
2017-11-06Simplify Linux sig{timed}wait{info} implementationsAdhemerval Zanella
This patch simplifies sig{timed}wait{info} by: - Assuming __NR_rt_sigtimedwait existence on all architectures due minimum kernel version requirement (it pre-dates Linux git inclusion for Linux 2.6.12). - Call __sigtimedwait on both sigwait and sigwaitinfo. - Now that sigwait is based on an internal sigtimedwait call and it is present of both libc.so and libpthread.so we need to add an external private definition of __sigtimedwait for libpthread.so call. Checked on x86_64-linux-gnu. * sysdeps/unix/sysv/linux/Versions (libc) [GLIBC_PRIVATE]: Add __sigtimedwait. * sysdeps/unix/sysv/linux/sigtimedwait.c: Simplify includes and assume __NR_rt_sigtimedwait. * sysdeps/unix/sysv/linux/sigwait.c (__sigwait): Call __sigtimedwait and add LIBC_CANCEL_HANDLED for cancellation marking. * sysdeps/unix/sysv/linux/sigwaitinfo.c (__sigwaitinfo): Likewise. Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Zack Weinberg <zackw@panix.com>
2017-11-03aarch64: Guess L1 cache linesize for aarch64Richard Henderson
Using the cache hierarchy linesize minimum in CTR_EL0. See the comment within the code for rationale. * sysdeps/unix/sysv/linux/aarch64/sysconf.c: New file.
2017-11-02test-errno-linux: quotactl can fail with EPERM in containersFlorian Weimer
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2017-10-31Remove useless #ifdefs from Linux sig*.c syscallsYury Norov
sigprocmask.c, sigtimedwait.c, sigwait.c and sigwaitinfo.c files from sysdeps/unix/sysv/linux include nptl-signals.h via nptl/pthreadP.h, and so SIGCANCEL and SIGSETXID become defined unconditionally. But later in the code, there are some checks weither symbols defined, which is useless. This patch removes useless checks. Checked on x86_64-linux-gnu. * sysdeps/unix/sysv/linux/sigprocmask.c: Remove useless #ifdefs. * sysdeps/unix/sysv/linux/sigtimedwait.c: Likewise. * sysdeps/unix/sysv/linux/sigwait.c: Likewise. * sysdeps/unix/sysv/linux/sigwaitinfo.c: Likewise. Signed-off-by: Yury Norov <ynorov@caviumnetworks.com> Reviewed-by: Andreas Schwab <schwab@suse.de> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2017-10-31Consolidate Linux sigpending() implementationYury Norov
ia64, s390-64, sparc64 and x86_64 host their own implementation of sigpending() in corresponding files, but they are identical to generic linux file despite few comments. This patch removes that files, so the implementation of sigpending() is taken from sysdeps/unix/sysv/linux for all ports. Build-tested on x86_64. * sysdeps/unix/sysv/linux/ia64/sigpending.c: Remove file. * sysdeps/unix/sysv/linux/s390/s390-64/sigpending.c: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/sigpending.c: Likewise. * sysdeps/unix/sysv/linux/x86_64/sigpending.c: Likewise. Signed-off-by: Yury Norov <ynorov@caviumnetworks.com> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2017-10-23posix: Do not use WNOHANG in waitpid call for Linux posix_spawnAdhemerval Zanella
As shown in some buildbot issues on aarch64 and powerpc, calling clone (VFORK) and waitpid (WNOHANG) does not guarantee the child is ready to be collected. This patch changes the call back to 0 as before fe05e1cb6d64 fix. This change can lead to the scenario 4.3 described in the commit, where the waitpid call can hang undefinitely on the call. However this is also a very unlikely and also undefinied situation where both the caller is trying to terminate a pid before posix_spawn returns and the race pid reuse is triggered. I don't see how to correct handle this specific situation within posix_spawn. Checked on x86_64-linux-gnu, aarch64-linux-gnu and powerpc64-linux-gnu. * sysdeps/unix/sysv/linux/spawni.c (__spawnix): Use 0 instead of WNOHANG in waitpid call.
2017-10-20posix: Fix improper assert in Linux posix_spawn (BZ#22273)Adhemerval Zanella
As noted by Florian Weimer, current Linux posix_spawn implementation can trigger an assert if the auxiliary process is terminated before actually setting the err member: 340 /* Child must set args.err to something non-negative - we rely on 341 the parent and child sharing VM. */ 342 args.err = -1; [...] 362 new_pid = CLONE (__spawni_child, STACK (stack, stack_size), stack_size, 363 CLONE_VM | CLONE_VFORK | SIGCHLD, &args); 364 365 if (new_pid > 0) 366 { 367 ec = args.err; 368 assert (ec >= 0); Another possible issue is killing the child between setting the err and actually calling execve. In this case the process will not ran, but posix_spawn also will not report any error: 269 270 args->err = 0; 271 args->exec (args->file, args->argv, args->envp); As suggested by Andreas Schwab, this patch removes the faulty assert and also handles any signal that happens before fork and execve as the spawn was successful (and thus relaying the handling to the caller to figure this out). Different than Florian, I can not see why using atomics to set err would help here, essentially the code runs sequentially (due CLONE_VFORK) and I think it would not be legal the compiler evaluate ec without checking for new_pid result (thus there is no need to compiler barrier). Summarizing the possible scenarios on posix_spawn execution, we have: 1. For default case with a success execution, args.err will be 0, pid will not be collected and it will be reported to caller. 2. For default failure case, args.err will be positive and the it will be collected by the waitpid. An error will be reported to the caller. 3. For the unlikely case where the process was terminated and not collected by a caller signal handler, it will be reported as succeful execution and not be collected by posix_spawn (since args.err will be 0). The caller will need to actually handle this case. 4. For the unlikely case where the process was terminated and collected by caller we have 3 other possible scenarios: 4.1. The auxiliary process was terminated with args.err equal to 0: it will handled as 1. (so it does not matter if we hit the pid reuse race since we won't possible collect an unexpected process). 4.2. The auxiliary process was terminated after execve (due a failure in calling it) and before setting args.err to -1: it will also be handle as 1. but with the issue of not be able to report the caller a possible execve failures. 4.3. The auxiliary process was terminated after args.err is set to -1: this is the case where it will be possible to hit the pid reuse case where we will need to collected the auxiliary pid but we can not be sure if it will be expected one. I think for this case we need to actually change waitpid to use WNOHANG to avoid hanging indefinitely on the call and report an error to caller since we can't differentiate between a default failure as 2. and a possible pid reuse race issue. Checked on x86_64-linux-gnu. * sysdeps/unix/sysv/linux/spawni.c (__spawnix): Handle the case where the auxiliary process is terminated by a signal before calling _exit or execve.
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