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Re: [PATCH v2 01/11] Linux/Alpha: don't use timeval32 system calls.


On Fri, Oct 25, 2019 at 5:09 AM Adhemerval Zanella
<adhemerval.zanella@linaro.org> wrote:
>
> From: Zack Weinberg <zackw@panix.com>
>
> Changes from previous version:
>
>   - Add check usage32 check on __wait4_tv32.
>
>   - Change capitalized functions to lowercase.
>
> --
>
> Linux/Alpha has two versions of several system call wrappers that take
> or return data of type "struct timeval" (possibly nested inside a
> larger structure).  The GLIBC_2.0 version is a compat symbol that
> calls __NR_osf_foo or __NR_old_foo and uses a struct timeval with a
> 32-bit tv_sec field.  The GLIBC_2.1 version is used for current code,
> calls __NR_foo, and uses a struct timeval with a 64-bit tv_sec field.
>
> This patch changes all of the compat symbols of this type to be
> wrappers around their GLIBC_2.1 counterparts; the compatibility system
> calls will no longer be used.  It serves as a proposal for part of how
> we do the transition to 64-bit time_t on systems that currently use
> 32-bit time_t:
>
>  * The patched glibc will NOT use system calls that involve 32-bit
>    time_t to implement its compatibility symbols.  This will make both
>    our lives and the kernel maintainers' lives easier.  The primary
>    argument I've seen against it is that the kernel could warn about
>    uses of the old system calls, helping people find old binaries that
>    need to be recompiled.  I think there are several other ways we
>    could accomplish this, e.g. scripts to scan the filesystem for
>    binaries with references to the old symbol versions, or issuing
>    diagnostics ourselves.
>
>  * The compat symbols do NOT report failure after the Y2038 deadline.
>    An earlier revision of this patch had them return -1 and set errno
>    to EOVERFLOW, but Adhemerval pointed out that many of them have
>    already performed side effects at the point where we discover the
>    overflow, so that would break more than it fixes.  Also, we don't
>    want people to be _checking_ for EOVERFLOW from these functions; we
>    want them to recompile with 64-bit time_t.  So it's not actually
>    useful for them to report failure to the calling code.
>
>  * What they do do, when they encounter overflow, is saturate the
>    overflowed "struct timeval"(s): tv_sec is set to INT32_MAX and
>    tv_nsec is set to 999999.  That means time stops advancing for
>    programs with 32-bit time_t when they reach the deadline.  That's
>    obviously going to break stuff, but I think wrapping around is
>    probably going to break _more_ stuff.  I'd be interested to hear
>    arguments against, if anyone has one.
>
> The new header file tv32-compat.h is currently Alpha-specific but I
> mean for it to be reused to aid in writing wrappers for all affected
> architectures.  I only put it in sysdeps/unix/sysv/linux/alpha for now
> because I haven't checked whether the various "foo32" structures it
> defines agree with the ABI for ports other than Linux/Alpha.
>
> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
> ---
>  sysdeps/unix/sysv/linux/Makefile              |   2 +-
>  sysdeps/unix/sysv/linux/adjtime.c             |  40 ++---
>  sysdeps/unix/sysv/linux/adjtimex.c            |  40 +++++
>  sysdeps/unix/sysv/linux/alpha/Makefile        |   2 +-
>  sysdeps/unix/sysv/linux/alpha/adjtime.c       |  82 +---------
>  sysdeps/unix/sysv/linux/alpha/adjtimex.c      |  22 +++
>  sysdeps/unix/sysv/linux/alpha/osf_adjtime.c   | 130 ++++++++++++++++
>  sysdeps/unix/sysv/linux/alpha/osf_getitimer.c |  41 +++++
>  sysdeps/unix/sysv/linux/alpha/osf_getrusage.c |  39 +++++
>  .../unix/sysv/linux/alpha/osf_gettimeofday.c  |  43 ++++++
>  sysdeps/unix/sysv/linux/alpha/osf_setitimer.c |  49 ++++++
>  .../unix/sysv/linux/alpha/osf_settimeofday.c  |  41 +++++
>  sysdeps/unix/sysv/linux/alpha/osf_utimes.c    |  37 +++++
>  sysdeps/unix/sysv/linux/alpha/osf_wait4.c     |  41 +++++
>  sysdeps/unix/sysv/linux/alpha/syscalls.list   |  27 ++--
>  sysdeps/unix/sysv/linux/alpha/tv32-compat.h   | 146 ++++++++++++++++++
>  sysdeps/unix/sysv/linux/gettimeofday.c        |  14 +-
>  sysdeps/unix/sysv/linux/syscalls.list         |   1 -
>  18 files changed, 666 insertions(+), 131 deletions(-)
>  create mode 100644 sysdeps/unix/sysv/linux/adjtimex.c
>  create mode 100644 sysdeps/unix/sysv/linux/alpha/adjtimex.c
>  create mode 100644 sysdeps/unix/sysv/linux/alpha/osf_adjtime.c
>  create mode 100644 sysdeps/unix/sysv/linux/alpha/osf_getitimer.c
>  create mode 100644 sysdeps/unix/sysv/linux/alpha/osf_getrusage.c
>  create mode 100644 sysdeps/unix/sysv/linux/alpha/osf_gettimeofday.c
>  create mode 100644 sysdeps/unix/sysv/linux/alpha/osf_setitimer.c
>  create mode 100644 sysdeps/unix/sysv/linux/alpha/osf_settimeofday.c
>  create mode 100644 sysdeps/unix/sysv/linux/alpha/osf_utimes.c
>  create mode 100644 sysdeps/unix/sysv/linux/alpha/osf_wait4.c
>  create mode 100644 sysdeps/unix/sysv/linux/alpha/tv32-compat.h
>
> diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
> index bbab8f8cc3..a7623fb390 100644
> --- a/sysdeps/unix/sysv/linux/Makefile
> +++ b/sysdeps/unix/sysv/linux/Makefile
> @@ -14,7 +14,7 @@ endif
>  ifeq ($(subdir),misc)
>  include $(firstword $(wildcard $(sysdirs:=/sysctl.mk)))
>
> -sysdep_routines += clone umount umount2 readahead \
> +sysdep_routines += adjtimex clone umount umount2 readahead \
>                    setfsuid setfsgid epoll_pwait signalfd \
>                    eventfd eventfd_read eventfd_write prlimit \
>                    personality epoll_wait tee vmsplice splice \
> diff --git a/sysdeps/unix/sysv/linux/adjtime.c b/sysdeps/unix/sysv/linux/adjtime.c
> index 6d1e129ccc..6b8021caa3 100644
> --- a/sysdeps/unix/sysv/linux/adjtime.c
> +++ b/sysdeps/unix/sysv/linux/adjtime.c
> @@ -23,39 +23,14 @@
>  #define MAX_SEC        (INT_MAX / 1000000L - 2)
>  #define MIN_SEC        (INT_MIN / 1000000L + 2)
>
> -#ifndef MOD_OFFSET
> -#define modes mode
> -#endif
> -
> -#ifndef TIMEVAL
> -#define TIMEVAL timeval
> -#endif
> -
> -#ifndef TIMEX
> -#define TIMEX timex
> -#endif
> -
> -#ifndef ADJTIME
> -#define ADJTIME __adjtime
> -#endif
> -
> -#ifndef ADJTIMEX
> -#define NO_LOCAL_ADJTIME
> -#define ADJTIMEX(x) __adjtimex (x)
> -#endif
> -
> -#ifndef LINKAGE
> -#define LINKAGE
> -#endif
> -
> -LINKAGE int
> -ADJTIME (const struct TIMEVAL *itv, struct TIMEVAL *otv)
> +int
> +__adjtime (const struct timeval *itv, struct timeval *otv)
>  {
> -  struct TIMEX tntx;
> +  struct timex tntx;
>
>    if (itv)
>      {
> -      struct TIMEVAL tmp;
> +      struct timeval tmp;
>
>        /* We will do some check here. */
>        tmp.tv_sec = itv->tv_sec + itv->tv_usec / 1000000L;
> @@ -68,7 +43,7 @@ ADJTIME (const struct TIMEVAL *itv, struct TIMEVAL *otv)
>    else
>      tntx.modes = ADJ_OFFSET_SS_READ;
>
> -  if (__glibc_unlikely (ADJTIMEX (&tntx) < 0))
> +  if (__glibc_unlikely (__adjtimex (&tntx) < 0))
>      return -1;
>
>    if (otv)
> @@ -87,6 +62,9 @@ ADJTIME (const struct TIMEVAL *itv, struct TIMEVAL *otv)
>    return 0;
>  }
>
> -#ifdef NO_LOCAL_ADJTIME
> +#ifdef VERSION_adjtime
> +weak_alias (__adjtime, __wadjtime);
> +default_symbol_version (__wadjtime, adjtime, VERSION_adjtime);
> +#else
>  weak_alias (__adjtime, adjtime)
>  #endif
> diff --git a/sysdeps/unix/sysv/linux/adjtimex.c b/sysdeps/unix/sysv/linux/adjtimex.c
> new file mode 100644
> index 0000000000..6d62c72a17
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/adjtimex.c
> @@ -0,0 +1,40 @@
> +/* Tune kernel clock.  Linux specific syscall.
> +   Copyright (C) 2019 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; if not, see
> +   <http://www.gnu.org/licenses/>.  */
> +
> +#include <sys/timex.h>
> +#include <sysdep.h>
> +
> +int
> +___adjtimex (struct timex *buf)
> +{
> +  return INLINE_SYSCALL_CALL (adjtimex, buf);

The y2038 safe platforms don't have the adjtimex syscall, instead they
have the clock_adjtime call. Can this fall back to clock_adjtime if
__NR_adjtimex isn't defined?

Alistair

> +}
> +
> +#ifdef VERSION_adjtimex
> +weak_alias (___adjtimex, __wadjtimex);
> +weak_alias (___adjtimex, __wnadjtime);
> +default_symbol_version (___adjtimex,  __adjtimex, VERSION_adjtimex);
> +default_symbol_version (__wadjtimex,    adjtimex, VERSION_adjtimex);
> +default_symbol_version (__wnadjtime, ntp_adjtime, VERSION_adjtimex);
> +libc_hidden_ver (___adjtimex, __adjtimex);
> +#else
> +strong_alias (___adjtimex, __adjtimex)
> +weak_alias (___adjtimex, adjtimex)
> +weak_alias (___adjtimex, ntp_adjtime)
> +libc_hidden_def (__adjtimex)
> +#endif
> diff --git a/sysdeps/unix/sysv/linux/alpha/Makefile b/sysdeps/unix/sysv/linux/alpha/Makefile
> index fdd089af71..2e132e474b 100644
> --- a/sysdeps/unix/sysv/linux/alpha/Makefile
> +++ b/sysdeps/unix/sysv/linux/alpha/Makefile
> @@ -9,7 +9,7 @@ sysdep_routines += ieee_get_fp_control ieee_set_fp_control \
>                    ioperm
>
>  # Support old timeval32 entry points
> -sysdep_routines += osf_gettimeofday osf_settimeofday \
> +sysdep_routines += osf_adjtime osf_gettimeofday osf_settimeofday \
>                    osf_getitimer osf_setitimer osf_utimes \
>                    osf_getrusage osf_wait4
>
> diff --git a/sysdeps/unix/sysv/linux/alpha/adjtime.c b/sysdeps/unix/sysv/linux/alpha/adjtime.c
> index 4aede1cc40..9cb058ee55 100644
> --- a/sysdeps/unix/sysv/linux/alpha/adjtime.c
> +++ b/sysdeps/unix/sysv/linux/alpha/adjtime.c
> @@ -1,4 +1,5 @@
> -/* Copyright (C) 1998-2019 Free Software Foundation, Inc.
> +/* adjtime -- Adjust the current time of day.  Linux/Alpha/tv64 version.
> +   Copyright (C) 2019 Free Software Foundation, Inc.
>     This file is part of the GNU C Library.
>
>     The GNU C Library is free software; you can redistribute it and/or
> @@ -15,80 +16,7 @@
>     License along with the GNU C Library.  If not, see
>     <https://www.gnu.org/licenses/>.  */
>
> -#include <shlib-compat.h>
> -#include <sysdep.h>
> -#include <sys/time.h>
> -
> -
> -#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
> -struct timeval32
> -{
> -    int tv_sec, tv_usec;
> -};
> -
> -struct timex32 {
> -       unsigned int modes;     /* mode selector */
> -       long offset;            /* time offset (usec) */
> -       long freq;              /* frequency offset (scaled ppm) */
> -       long maxerror;          /* maximum error (usec) */
> -       long esterror;          /* estimated error (usec) */
> -       int status;             /* clock command/status */
> -       long constant;          /* pll time constant */
> -       long precision;         /* clock precision (usec) (read only) */
> -       long tolerance;         /* clock frequency tolerance (ppm)
> -                                * (read only)
> -                                */
> -       struct timeval32 time;  /* (read only) */
> -       long tick;              /* (modified) usecs between clock ticks */
> -
> -       long ppsfreq;           /* pps frequency (scaled ppm) (ro) */
> -       long jitter;            /* pps jitter (us) (ro) */
> -       int shift;              /* interval duration (s) (shift) (ro) */
> -       long stabil;            /* pps stability (scaled ppm) (ro) */
> -       long jitcnt;            /* jitter limit exceeded (ro) */
> -       long calcnt;            /* calibration intervals (ro) */
> -       long errcnt;            /* calibration errors (ro) */
> -       long stbcnt;            /* stability limit exceeded (ro) */
> -
> -       int  :32; int  :32; int  :32; int  :32;
> -       int  :32; int  :32; int  :32; int  :32;
> -       int  :32; int  :32; int  :32; int  :32;
> -};
> -
> -#define TIMEVAL                timeval32
> -#define TIMEX          timex32
> -#define ADJTIME                attribute_compat_text_section __adjtime_tv32
> -#define ADJTIMEX(x)    INLINE_SYSCALL (old_adjtimex, 1, x)
> -#define ADJTIMEX32(x)  INLINE_SYSCALL (old_adjtimex, 1, x)
> -
> +/* We can use the generic Linux implementation, but we have to override its
> +   default symbol version.  */
> +#define VERSION_adjtime GLIBC_2.1
>  #include <sysdeps/unix/sysv/linux/adjtime.c>
> -
> -int attribute_compat_text_section
> -__adjtimex_tv32 (struct timex32 *tx) { return ADJTIMEX (tx); }
> -
> -strong_alias (__adjtimex_tv32, __adjtimex_tv32_1);
> -strong_alias (__adjtimex_tv32, __adjtimex_tv32_2);
> -compat_symbol (libc, __adjtimex_tv32_1, __adjtimex, GLIBC_2_0);
> -compat_symbol (libc, __adjtimex_tv32_2, adjtimex, GLIBC_2_0);
> -compat_symbol (libc, __adjtime_tv32, adjtime, GLIBC_2_0);
> -#endif /* SHLIB_COMPAT */
> -
> -#undef TIMEVAL
> -#undef TIMEX
> -#undef ADJTIME
> -#undef ADJTIMEX
> -#define TIMEVAL                timeval
> -#define TIMEX          timex
> -#define ADJTIMEX(x)    INLINE_SYSCALL (adjtimex, 1, x)
> -
> -#include <sysdeps/unix/sysv/linux/adjtime.c>
> -
> -int
> -__adjtimex_tv64 (struct timex *tx) { return ADJTIMEX (tx); }
> -
> -libc_hidden_ver (__adjtimex_tv64, __adjtimex)
> -strong_alias (__adjtimex_tv64, __adjtimex_tv64p);
> -weak_alias (__adjtimex_tv64, ntp_adjtime);
> -versioned_symbol (libc, __adjtimex_tv64, __adjtimex, GLIBC_2_1);
> -versioned_symbol (libc, __adjtimex_tv64p, adjtimex, GLIBC_2_1);
> -versioned_symbol (libc, __adjtime, adjtime, GLIBC_2_1);
> diff --git a/sysdeps/unix/sysv/linux/alpha/adjtimex.c b/sysdeps/unix/sysv/linux/alpha/adjtimex.c
> new file mode 100644
> index 0000000000..1a8e0a9529
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/alpha/adjtimex.c
> @@ -0,0 +1,22 @@
> +/* adjtimex -- Adjust the current time of day.  Linux/Alpha/tv64 version.
> +   Copyright (C) 2019 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; if not, see
> +   <http://www.gnu.org/licenses/>.  */
> +
> +/* We can use the generic Linux implementation, but we have to override its
> +   default symbol version.  */
> +#define VERSION_adjtimex GLIBC_2.1
> +#include <sysdeps/unix/sysv/linux/adjtimex.c>
> diff --git a/sysdeps/unix/sysv/linux/alpha/osf_adjtime.c b/sysdeps/unix/sysv/linux/alpha/osf_adjtime.c
> new file mode 100644
> index 0000000000..c948ac2dda
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/alpha/osf_adjtime.c
> @@ -0,0 +1,130 @@
> +/* adjtime -- adjust the system clock.  Linux/Alpha/tv32 version.
> +   Copyright (C) 2019 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; if not, see
> +   <http://www.gnu.org/licenses/>.  */
> +
> +#include <shlib-compat.h>
> +
> +#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
> +
> +#include <sys/time.h>
> +#include <sys/timex.h>
> +#include <tv32-compat.h>
> +
> +struct timex32 {
> +       unsigned int modes;     /* mode selector */
> +       long offset;            /* time offset (usec) */
> +       long freq;              /* frequency offset (scaled ppm) */
> +       long maxerror;          /* maximum error (usec) */
> +       long esterror;          /* estimated error (usec) */
> +       int status;             /* clock command/status */
> +       long constant;          /* pll time constant */
> +       long precision;         /* clock precision (usec) (read only) */
> +       long tolerance;         /* clock frequency tolerance (ppm)
> +                                * (read only)
> +                                */
> +       struct timeval32 time;  /* (read only) */
> +       long tick;              /* (modified) usecs between clock ticks */
> +
> +       long ppsfreq;           /* pps frequency (scaled ppm) (ro) */
> +       long jitter;            /* pps jitter (us) (ro) */
> +       int shift;              /* interval duration (s) (shift) (ro) */
> +       long stabil;            /* pps stability (scaled ppm) (ro) */
> +       long jitcnt;            /* jitter limit exceeded (ro) */
> +       long calcnt;            /* calibration intervals (ro) */
> +       long errcnt;            /* calibration errors (ro) */
> +       long stbcnt;            /* stability limit exceeded (ro) */
> +
> +       int  :32; int  :32; int  :32; int  :32;
> +       int  :32; int  :32; int  :32; int  :32;
> +       int  :32; int  :32; int  :32; int  :32;
> +};
> +
> +int
> +attribute_compat_text_section
> +__adjtime_tv32 (const struct timeval32 *itv, struct timeval32 *otv)
> +{
> +  struct timeval itv64, otv64;
> +  tv32_to_tv64 (&itv64, itv);
> +
> +  if (__adjtime (&itv64, &otv64) == -1)
> +    return -1;
> +
> +  tv64_to_tv32 (otv, &itv64);
> +  return 0;
> +}
> +
> +int
> +attribute_compat_text_section
> +__adjtimex_tv32 (struct timex32 *tx)
> +{
> +  struct timex tx64;
> +  memset (&tx64, 0, sizeof tx64);
> +  tx64.modes     = tx->modes;
> +  tx64.offset    = tx->offset;
> +  tx64.freq      = tx->freq;
> +  tx64.maxerror  = tx->maxerror;
> +  tx64.esterror  = tx->esterror;
> +  tx64.status    = tx->status;
> +  tx64.constant  = tx->constant;
> +  tx64.precision = tx->precision;
> +  tx64.tolerance = tx->tolerance;
> +  tx64.tick      = tx->tick;
> +  tx64.ppsfreq   = tx->ppsfreq;
> +  tx64.jitter    = tx->jitter;
> +  tx64.shift     = tx->shift;
> +  tx64.stabil    = tx->stabil;
> +  tx64.jitcnt    = tx->jitcnt;
> +  tx64.calcnt    = tx->calcnt;
> +  tx64.errcnt    = tx->errcnt;
> +  tx64.stbcnt    = tx->stbcnt;
> +  tv32_to_tv64 (&tx64.time, &tx->time);
> +
> +  int status = __adjtimex (&tx64);
> +  if (status < 0)
> +    return status;
> +
> +  memset (tx, 0, sizeof *tx);
> +  tx->modes     = tx64.modes;
> +  tx->offset    = tx64.offset;
> +  tx->freq      = tx64.freq;
> +  tx->maxerror  = tx64.maxerror;
> +  tx->esterror  = tx64.esterror;
> +  tx->status    = tx64.status;
> +  tx->constant  = tx64.constant;
> +  tx->precision = tx64.precision;
> +  tx->tolerance = tx64.tolerance;
> +  tx->tick      = tx64.tick;
> +  tx->ppsfreq   = tx64.ppsfreq;
> +  tx->jitter    = tx64.jitter;
> +  tx->shift     = tx64.shift;
> +  tx->stabil    = tx64.stabil;
> +  tx->jitcnt    = tx64.jitcnt;
> +  tx->calcnt    = tx64.calcnt;
> +  tx->errcnt    = tx64.errcnt;
> +  tx->stbcnt    = tx64.stbcnt;
> +  tv64_to_tv32 (&tx->time, &tx64.time);
> +
> +  return status;
> +}
> +
> +strong_alias (__adjtimex_tv32, __adjtimex_tv32_1);
> +strong_alias (__adjtimex_tv32, __adjtimex_tv32_2);
> +compat_symbol (libc, __adjtimex_tv32_1, __adjtimex, GLIBC_2_0);
> +compat_symbol (libc, __adjtimex_tv32_2, adjtimex, GLIBC_2_0);
> +compat_symbol (libc, __adjtime_tv32, adjtime, GLIBC_2_0);
> +
> +#endif /* SHLIB_COMPAT */
> diff --git a/sysdeps/unix/sysv/linux/alpha/osf_getitimer.c b/sysdeps/unix/sysv/linux/alpha/osf_getitimer.c
> new file mode 100644
> index 0000000000..f290954783
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/alpha/osf_getitimer.c
> @@ -0,0 +1,41 @@
> +/* getitimer -- Get the state of an interval timer.  Linux/Alpha/tv32 version.
> +   Copyright (C) 2019 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; if not, see
> +   <http://www.gnu.org/licenses/>.  */
> +
> +#include <shlib-compat.h>
> +
> +#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
> +
> +#include <sys/time.h>
> +#include <tv32-compat.h>
> +
> +int
> +attribute_compat_text_section
> +__getitimer_tv32 (int which, struct itimerval32 *curr_value)
> +{
> +  struct itimerval curr_value_64;
> +  if (__getitimer (which, &curr_value_64) == -1)
> +    return -1;
> +
> +  /* Write all fields of 'curr_value' regardless of overflow.  */
> +  tv64_to_tv32 (&curr_value->it_interval, &curr_value_64.it_interval);
> +  tv64_to_tv32 (&curr_value->it_value, &curr_value_64.it_value);
> +  return 0;
> +}
> +
> +compat_symbol (libc, __getitimer_tv32, getitimer, GLIBC_2_0);
> +#endif
> diff --git a/sysdeps/unix/sysv/linux/alpha/osf_getrusage.c b/sysdeps/unix/sysv/linux/alpha/osf_getrusage.c
> new file mode 100644
> index 0000000000..918e8445d4
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/alpha/osf_getrusage.c
> @@ -0,0 +1,39 @@
> +/* utimes -- change file timestamps.  Linux/Alpha/tv32 version.
> +   Copyright (C) 2019 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; if not, see
> +   <http://www.gnu.org/licenses/>.  */
> +
> +#include <shlib-compat.h>
> +
> +#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
> +
> +#include <sys/time.h>
> +#include <sys/resource.h>
> +#include <tv32-compat.h>
> +
> +int
> +__getrusage_tv32 (int who, struct rusage32 *usage32)
> +{
> +  struct rusage usage64;
> +  if (__getrusage (who, &usage64) == -1)
> +    return -1;
> +
> +  rusage64_to_rusage32 (usage32, &usage64);
> +  return 0;
> +}
> +
> +compat_symbol (libc, __getrusage_tv32, getrusage, GLIBC_2_0);
> +#endif
> diff --git a/sysdeps/unix/sysv/linux/alpha/osf_gettimeofday.c b/sysdeps/unix/sysv/linux/alpha/osf_gettimeofday.c
> new file mode 100644
> index 0000000000..e6cc522dd1
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/alpha/osf_gettimeofday.c
> @@ -0,0 +1,43 @@
> +/* gettimeofday -- Get the current time of day.  Linux/Alpha/tv32 version.
> +   Copyright (C) 2019 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; if not, see
> +   <http://www.gnu.org/licenses/>.  */
> +
> +#include <shlib-compat.h>
> +
> +#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
> +
> +#include <sys/time.h>
> +#include <tv32-compat.h>
> +
> +/* Get the current time of day and timezone information putting it
> +   into *TV and *TZ.  */
> +
> +int
> +attribute_compat_text_section
> +__gettimeofday_tv32 (struct timeval32 *restrict tv32, void *restrict tz)
> +{
> +  struct timeval tv;
> +  __gettimeofday (&tv, tz);
> +
> +  tv64_to_tv32 (tv32, &tv);
> +  return 0;
> +}
> +
> +compat_symbol (libc, __gettimeofday_tv32, __gettimeofday, GLIBC_2_0);
> +strong_alias (__gettimeofday_tv32, __gettimeofday_tv32_1);
> +compat_symbol (libc, __gettimeofday_tv32_1, gettimeofday, GLIBC_2_0);
> +#endif
> diff --git a/sysdeps/unix/sysv/linux/alpha/osf_setitimer.c b/sysdeps/unix/sysv/linux/alpha/osf_setitimer.c
> new file mode 100644
> index 0000000000..d6bbcee60a
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/alpha/osf_setitimer.c
> @@ -0,0 +1,49 @@
> +/* getitimer -- Get the state of an interval timer.  Linux/Alpha/tv32 version.
> +   Copyright (C) 2019 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; if not, see
> +   <http://www.gnu.org/licenses/>.  */
> +
> +#include <shlib-compat.h>
> +
> +#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
> +
> +#include <sys/time.h>
> +#include <tv32-compat.h>
> +
> +int
> +attribute_compat_text_section
> +__setitimer_tv32 (int which, const struct itimerval32 *restrict new_value,
> +                 struct itimerval32 *restrict old_value)
> +{
> +  struct itimerval new_value_64;
> +  tv32_to_tv64 (&new_value_64.it_interval, &new_value->it_interval);
> +  tv32_to_tv64 (&new_value_64.it_value, &new_value->it_value);
> +
> +  if (old_value == NULL)
> +    return __setitimer (which, &new_value_64, NULL);
> +
> +  struct itimerval old_value_64;
> +  if (__setitimer (which, &new_value_64, &old_value_64) == -1)
> +    return -1;
> +
> +  /* Write all fields of 'old_value' regardless of overflow.  */
> +  tv64_to_tv32 (&old_value->it_interval, &old_value_64.it_interval);
> +  tv64_to_tv32 (&old_value->it_value, &old_value_64.it_value);
> +  return 0;
> +}
> +
> +compat_symbol (libc, __setitimer_tv32, setitimer, GLIBC_2_0);
> +#endif
> diff --git a/sysdeps/unix/sysv/linux/alpha/osf_settimeofday.c b/sysdeps/unix/sysv/linux/alpha/osf_settimeofday.c
> new file mode 100644
> index 0000000000..fb2a36df19
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/alpha/osf_settimeofday.c
> @@ -0,0 +1,41 @@
> +/* settimeofday -- Set the current time of day.  Linux/Alpha/tv32 version.
> +   Copyright (C) 2019 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; if not, see
> +   <http://www.gnu.org/licenses/>.  */
> +
> +#include <shlib-compat.h>
> +
> +#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
> +
> +#include <sys/time.h>
> +#include <time.h>
> +#include <errno.h>
> +#include <tv32-compat.h>
> +
> +/* Set the current time of day and timezone information.
> +   This call is restricted to the super-user.  */
> +int
> +attribute_compat_text_section
> +__settimeofday_tv32 (const struct timeval32 *tv32,
> +                     const struct timezone *tz)
> +{
> +  struct timeval tv;
> +  tv32_to_tv64 (&tv, tv32);
> +  return __settimeofday (&tv, tz);
> +}
> +
> +compat_symbol (libc, __settimeofday_tv32, settimeofday, GLIBC_2_0);
> +#endif
> diff --git a/sysdeps/unix/sysv/linux/alpha/osf_utimes.c b/sysdeps/unix/sysv/linux/alpha/osf_utimes.c
> new file mode 100644
> index 0000000000..788fb7cd44
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/alpha/osf_utimes.c
> @@ -0,0 +1,37 @@
> +/* utimes -- change file timestamps.  Linux/Alpha/tv32 version.
> +   Copyright (C) 2019 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; if not, see
> +   <http://www.gnu.org/licenses/>.  */
> +
> +#include <shlib-compat.h>
> +
> +#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
> +
> +#include <sys/time.h>
> +#include <tv32-compat.h>
> +
> +int
> +attribute_compat_text_section
> +__utimes_tv32 (const char *filename, const struct timeval32 times32[2])
> +{
> +  struct timeval times[2];
> +  tv32_to_tv64 (&times[0], &times32[0]);
> +  tv32_to_tv64 (&times[1], &times32[1]);
> +  return __utimes (filename, times);
> +}
> +
> +compat_symbol (libc, __utimes_tv32, utimes, GLIBC_2_0);
> +#endif
> diff --git a/sysdeps/unix/sysv/linux/alpha/osf_wait4.c b/sysdeps/unix/sysv/linux/alpha/osf_wait4.c
> new file mode 100644
> index 0000000000..e8db554660
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/alpha/osf_wait4.c
> @@ -0,0 +1,41 @@
> +/* wait4 -- wait for process to change state.  Linux/Alpha/tv32 version.
> +   Copyright (C) 2019 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; if not, see
> +   <http://www.gnu.org/licenses/>.  */
> +
> +#include <shlib-compat.h>
> +
> +#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
> +
> +#include <sys/time.h>
> +#include <sys/resource.h>
> +#include <sys/wait.h>
> +#include <tv32-compat.h>
> +
> +pid_t
> +attribute_compat_text_section
> +__wait4_tv32 (pid_t pid, int *status, int options, struct rusage32 *usage32)
> +{
> +  struct rusage usage64;
> +  pid_t child = __wait4 (pid, status, options, &usage64);
> +
> +  if (child >= 0 && usage32 != NULL)
> +    rusage64_to_rusage32 (usage32, &usage64);
> +  return child;
> +}
> +
> +compat_symbol (libc, __wait4_tv32, wait4, GLIBC_2_0);
> +#endif
> diff --git a/sysdeps/unix/sysv/linux/alpha/syscalls.list b/sysdeps/unix/sysv/linux/alpha/syscalls.list
> index 12cd021b60..c786aa751e 100644
> --- a/sysdeps/unix/sysv/linux/alpha/syscalls.list
> +++ b/sysdeps/unix/sysv/linux/alpha/syscalls.list
> @@ -1,4 +1,4 @@
> -# File name    Caller  Syscall name    # args  Strong name     Weak names
> +# File name    Caller  Syscall name    Args    Strong name     Weak names
>
>  sigstack       -       sigstack        2       sigstack
>
> @@ -22,23 +22,14 @@ pciconfig_read      EXTRA   pciconfig_read  5       pciconfig_read
>  pciconfig_write        EXTRA   pciconfig_write 5       pciconfig_write
>  pciconfig_iobase EXTRA pciconfig_iobase 3      __pciconfig_iobase pciconfig_iobase
>
> -# support old timeval32 entry points
> -osf_gettimeofday -     osf_gettimeofday 2      __gettimeofday_tv32  __gettimeofday@GLIBC_2.0 gettimeofday@GLIBC_2.0
> -osf_settimeofday -     osf_settimeofday 2      __settimeofday_tv32  settimeofday@GLIBC_2.0
> -osf_getitimer  -       osf_getitimer   2       __getitimer_tv32  getitimer@GLIBC_2.0
> -osf_setitimer  -       osf_setitimer   3       __setitimer_tv32  setitimer@GLIBC_2.0
> -osf_utimes     -       osf_utimes      2       __utimes_tv32  utimes@GLIBC_2.0
> -osf_getrusage  -       osf_getrusage   2       __getrusage_tv32  getrusage@GLIBC_2.0
> -osf_wait4      -       osf_wait4       4       __wait4_tv32  wait4@GLIBC_2.0
> -
> -# support new timeval64 entry points
> -gettimeofday   -       gettimeofday    2       __GI___gettimeofday gettimeofday@@GLIBC_2.1 __gettimeofday@@GLIBC_2.1
> -settimeofday   -       settimeofday    2       __settimeofday settimeofday@@GLIBC_2.1
> -getitimer      -       getitimer       2       __getitimer getitimer@@GLIBC_2.1
> -setitimer      -       setitimer       3       __setitimer setitimer@@GLIBC_2.1
> -utimes         -       utimes          2       __utimes utimes@@GLIBC_2.1
> -getrusage      -       getrusage       2       __getrusage getrusage@@GLIBC_2.1
> -wait4          -       wait4           4       __wait4 wait4@@GLIBC_2.1
> +# timeval64 entry points (see osf_*.c for GLIBC_2.0 timeval32 equivalents)
> +gettimeofday   -       gettimeofday    i:pP    __GI___gettimeofday gettimeofday@@GLIBC_2.1 __gettimeofday@@GLIBC_2.1
> +settimeofday   -       settimeofday    i:PP    __settimeofday  settimeofday@@GLIBC_2.1
> +getitimer      -       getitimer       i:ip    __getitimer     getitimer@@GLIBC_2.1
> +setitimer      -       setitimer       i:ipP   __setitimer     setitimer@@GLIBC_2.1
> +utimes         -       utimes          i:sp    __utimes        utimes@@GLIBC_2.1
> +getrusage      -       getrusage       i:ip    __getrusage     getrusage@@GLIBC_2.1
> +wait4          -       wait4           i:iWiP  __wait4         wait4@@GLIBC_2.1
>
>  # avoid 64-bit aliases on 32-bit statfs syscalls
>  fstatfs                -       fstatfs         i:ip    __fstatfs       fstatfs
> diff --git a/sysdeps/unix/sysv/linux/alpha/tv32-compat.h b/sysdeps/unix/sysv/linux/alpha/tv32-compat.h
> new file mode 100644
> index 0000000000..e1edb7453a
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/alpha/tv32-compat.h
> @@ -0,0 +1,146 @@
> +/* Compatibility definitions for `struct timeval' with 32-bit time_t.
> +   Copyright (C) 2019 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; if not, see
> +   <http://www.gnu.org/licenses/>.  */
> +
> +#ifndef _TV32_COMPAT_H
> +#define _TV32_COMPAT_H 1
> +
> +#include <features.h>
> +
> +#include <bits/types.h>
> +#include <bits/types/time_t.h>
> +#include <bits/types/struct_timeval.h>
> +#include <bits/types/struct_timespec.h>
> +#include <bits/types/struct_rusage.h>
> +
> +#include <stdint.h> // for INT32_MAX
> +#include <string.h> // for memset
> +
> +#define TV_USEC_MAX 999999 // 10**6 - 1
> +
> +/* A version of 'struct timeval' with 32-bit time_t.  */
> +struct timeval32
> +{
> +  int32_t tv_sec;
> +  int32_t tv_usec;
> +};
> +
> +/* Structures containing 'struct timeval' with 32-bit time_t.  */
> +struct itimerval32
> +{
> +  struct timeval32 it_interval;
> +  struct timeval32 it_value;
> +};
> +
> +struct rusage32
> +{
> +  struct timeval32 ru_utime;   /* user time used */
> +  struct timeval32 ru_stime;   /* system time used */
> +  long ru_maxrss;              /* maximum resident set size */
> +  long ru_ixrss;               /* integral shared memory size */
> +  long ru_idrss;               /* integral unshared data size */
> +  long ru_isrss;               /* integral unshared stack size */
> +  long ru_minflt;              /* page reclaims */
> +  long ru_majflt;              /* page faults */
> +  long ru_nswap;               /* swaps */
> +  long ru_inblock;             /* block input operations */
> +  long ru_oublock;             /* block output operations */
> +  long ru_msgsnd;              /* messages sent */
> +  long ru_msgrcv;              /* messages received */
> +  long ru_nsignals;            /* signals received */
> +  long ru_nvcsw;               /* voluntary context switches */
> +  long ru_nivcsw;              /* involuntary " */
> +};
> +
> +/* Conversion functions.  If the seconds field of a timeval32 would
> +   overflow, they write { INT32_MAX, TV_USEC_MAX } to the output.  */
> +
> +static inline void
> +tv32_to_tv64 (struct timeval *restrict tv64,
> +              const struct timeval32 *restrict tv32)
> +{
> +  tv64->tv_sec = tv32->tv_sec;
> +  tv64->tv_usec = tv32->tv_usec;
> +}
> +
> +static inline void
> +tv32_to_ts64 (struct timespec *restrict ts64,
> +              const struct timeval32 *restrict tv32)
> +{
> +  ts64->tv_sec = tv32->tv_sec;
> +  ts64->tv_nsec = tv32->tv_usec * 1000;
> +}
> +
> +static inline void
> +tv64_to_tv32 (struct timeval32 *restrict tv32,
> +              const struct timeval *restrict tv64)
> +{
> +  if (__glibc_unlikely (tv64->tv_sec > (time_t) INT32_MAX))
> +    {
> +      tv32->tv_sec = INT32_MAX;
> +      tv32->tv_usec = TV_USEC_MAX;
> +    }
> +  else
> +    {
> +      tv32->tv_sec = tv64->tv_sec;
> +      tv32->tv_usec = tv64->tv_usec;
> +    }
> +}
> +
> +static inline void
> +ts64_to_tv32 (struct timeval32 *restrict tv32,
> +              const struct timespec *restrict ts64)
> +{
> +  if (__glibc_unlikely (ts64->tv_sec > (time_t) INT32_MAX))
> +    {
> +      tv32->tv_sec = INT32_MAX;
> +      tv32->tv_usec = TV_USEC_MAX;
> +    }
> +  else
> +    {
> +      tv32->tv_sec = ts64->tv_sec;
> +      tv32->tv_usec = ts64->tv_nsec / 1000;
> +    }
> +}
> +
> +static inline void
> +rusage64_to_rusage32 (struct rusage32 *restrict r32,
> +                      const struct rusage *restrict r64)
> +{
> +  /* Make sure the entire output structure is cleared, including
> +     padding and reserved fields.  */
> +  memset (r32, 0, sizeof *r32);
> +
> +  tv64_to_tv32 (&r32->ru_utime, &r64->ru_utime);
> +  tv64_to_tv32 (&r32->ru_stime, &r64->ru_stime);
> +  r32->ru_maxrss   = r64->ru_maxrss;
> +  r32->ru_ixrss    = r64->ru_ixrss;
> +  r32->ru_idrss    = r64->ru_idrss;
> +  r32->ru_isrss    = r64->ru_isrss;
> +  r32->ru_minflt   = r64->ru_minflt;
> +  r32->ru_majflt   = r64->ru_majflt;
> +  r32->ru_nswap    = r64->ru_nswap;
> +  r32->ru_inblock  = r64->ru_inblock;
> +  r32->ru_oublock  = r64->ru_oublock;
> +  r32->ru_msgsnd   = r64->ru_msgsnd;
> +  r32->ru_msgrcv   = r64->ru_msgrcv;
> +  r32->ru_nsignals = r64->ru_nsignals;
> +  r32->ru_nvcsw    = r64->ru_nvcsw;
> +  r32->ru_nivcsw   = r64->ru_nivcsw;
> +}
> +
> +#endif /* tv32-compat.h */
> diff --git a/sysdeps/unix/sysv/linux/gettimeofday.c b/sysdeps/unix/sysv/linux/gettimeofday.c
> index d69d4eaa96..c9597d6405 100644
> --- a/sysdeps/unix/sysv/linux/gettimeofday.c
> +++ b/sysdeps/unix/sysv/linux/gettimeofday.c
> @@ -30,10 +30,20 @@
>     putting it into *tv and *tz.  If tz is null, *tz is not filled.
>     Returns 0 on success, -1 on errors.  */
>  int
> -__gettimeofday (struct timeval *tv, struct timezone *tz)
> +___gettimeofday (struct timeval *tv, struct timezone *tz)
>  {
>    return INLINE_VSYSCALL (gettimeofday, 2, tv, tz);
>  }
> +
> +#ifdef VERSION_gettimeofday
> +weak_alias (___gettimeofday, __wgettimeofday);
> +default_symbol_version (___gettimeofday, __gettimeofday, VERSION_gettimeofday);
> +default_symbol_version (__wgettimeofday,   gettimeofday, VERSION_gettimeofday);
> +libc_hidden_ver (___gettimeofday, __gettimeofday);
> +libc_hidden_ver (___gettimeofday, gettimeofday);
> +#else
> +strong_alias (___gettimeofday, __gettimeofday)
> +weak_alias (___gettimeofday, gettimeofday)
>  libc_hidden_def (__gettimeofday)
> -weak_alias (__gettimeofday, gettimeofday)
>  libc_hidden_weak (gettimeofday)
> +#endif
> diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list
> index e374f97b5f..cdcf6c127b 100644
> --- a/sysdeps/unix/sysv/linux/syscalls.list
> +++ b/sysdeps/unix/sysv/linux/syscalls.list
> @@ -1,6 +1,5 @@
>  # File name    Caller  Syscall name    Args    Strong name     Weak names
>
> -adjtimex       adjtime adjtimex        i:p     __adjtimex      adjtimex ntp_adjtime
>  alarm          -       alarm           i:i     alarm
>  bdflush                EXTRA   bdflush         i:ii    __compat_bdflush        bdflush@GLIBC_2.0:GLIBC_2.23
>  capget         EXTRA   capget          i:pp    capget
> --
> 2.17.1
>


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