diff mbox

[v4,5/8] linux: Use long time_t __getitimer/__setitimer

Message ID 20200219181057.10297-6-alistair.francis@wdc.com
State New
Headers show

Commit Message

Alistair Francis Feb. 19, 2020, 6:10 p.m. UTC
The Linux kernel expects itimerval to use a 32-bit time_t, even on archs
with a 64-bit time_t (like RV32). To address this let's convert
itimerval to/from 32-bit and 64-bit to ensure the kernel always gets
a 32-bit time_t.

While we are converting these functions let's also convert them to be
the y2038 safe versions. This means there is a *64 function that is
called by a backwards compatible wrapper.
---
 include/time.h                        | 15 +++++
 sysdeps/unix/syscalls.list            |  2 -
 sysdeps/unix/sysv/linux/getitimer.c   | 59 +++++++++++++++++
 sysdeps/unix/sysv/linux/setitimer.c   | 95 +++++++++++++++++++++++++++
 sysdeps/unix/sysv/linux/tv32-compat.h | 31 +++++++++
 5 files changed, 200 insertions(+), 2 deletions(-)
 create mode 100644 sysdeps/unix/sysv/linux/getitimer.c
 create mode 100644 sysdeps/unix/sysv/linux/setitimer.c
 create mode 100644 sysdeps/unix/sysv/linux/tv32-compat.h

Comments

Lukasz Majewski Feb. 21, 2020, 10:03 a.m. UTC | #1
Hi Alistair,

> The Linux kernel expects itimerval to use a 32-bit time_t, even on
> archs with a 64-bit time_t (like RV32). To address this let's convert
> itimerval to/from 32-bit and 64-bit to ensure the kernel always gets
> a 32-bit time_t.
> 
> While we are converting these functions let's also convert them to be
> the y2038 safe versions. This means there is a *64 function that is
> called by a backwards compatible wrapper.
> ---
>  include/time.h                        | 15 +++++
>  sysdeps/unix/syscalls.list            |  2 -
>  sysdeps/unix/sysv/linux/getitimer.c   | 59 +++++++++++++++++
>  sysdeps/unix/sysv/linux/setitimer.c   | 95
> +++++++++++++++++++++++++++ sysdeps/unix/sysv/linux/tv32-compat.h |
> 31 +++++++++ 5 files changed, 200 insertions(+), 2 deletions(-)
>  create mode 100644 sysdeps/unix/sysv/linux/getitimer.c
>  create mode 100644 sysdeps/unix/sysv/linux/setitimer.c
>  create mode 100644 sysdeps/unix/sysv/linux/tv32-compat.h
> 
> diff --git a/include/time.h b/include/time.h
> index 8a4abb159f..eaa536d5c0 100644
> --- a/include/time.h
> +++ b/include/time.h
> @@ -6,6 +6,7 @@
>  # include <bits/types/locale_t.h>
>  # include <stdbool.h>
>  # include <time/mktime-internal.h>
> +# include <sys/time.h>
>  # include <endian.h>
>  # include <time-clockid.h>
>  # include <sys/time.h>
> @@ -119,6 +120,20 @@ struct __itimerval64
>  };
>  #endif
>  
> +#if __TIMESIZE == 64
> +# define __getitimer64 __getitimer
> +# define __setitimer64 __setitimer
> +#else
> +extern int __getitimer64 (enum __itimer_which __which,
> +                          struct __itimerval64 *__value);
> +
> +libc_hidden_proto (__getitimer64)
> +extern int __setitimer64 (enum __itimer_which __which,
> +                          const struct __itimerval64 *__restrict
> __new,
> +                          struct __itimerval64 *__restrict __old);
> +libc_hidden_proto (__setitimer64)
> +#endif
> +
>  #if __TIMESIZE == 64
>  # define __ctime64 ctime
>  #else
> diff --git a/sysdeps/unix/syscalls.list b/sysdeps/unix/syscalls.list
> index e28e801c7a..d249049d6e 100644
> --- a/sysdeps/unix/syscalls.list
> +++ b/sysdeps/unix/syscalls.list
> @@ -25,7 +25,6 @@ getgid		-	getgid
> 	Ei:	__getgid	getgid getgroups	-
> getgroups	i:ip	__getgroups	getgroups
> gethostid	-	gethostid	i:	gethostid
> gethostname	-	gethostname	i:bn
> __gethostname	gethostname -getitimer	-
> getitimer	i:ip	__getitimer	getitimer
> getpeername	-	getpeername	i:ibN
> __getpeername	getpeername getpid		-
> getpid		Ei:	__getpid	getpid
> getpriority	-	getpriority	i:ii
> __getpriority	getpriority @@ -67,7 +66,6 @@ setgid
> 	-	setgid		i:i	__setgid
> setgid setgroups	-	setgroups	i:ip
> setgroups sethostid	-	sethostid	i:i
> sethostid sethostname	-	sethostname	i:pi
> sethostname -setitimer	-	setitimer	i:ipp
> __setitimer	setitimer setpgid		-
> setpgrp		i:ii	__setpgid	setpgid
> setpriority	-	setpriority	i:iii
> __setpriority	setpriority setregid	-
> setregid	i:ii	__setregid	setregid diff --git
> a/sysdeps/unix/sysv/linux/getitimer.c
> b/sysdeps/unix/sysv/linux/getitimer.c new file mode 100644 index
> 0000000000..12f7963949 --- /dev/null +++
> b/sysdeps/unix/sysv/linux/getitimer.c @@ -0,0 +1,59 @@ +/* getitimer
> -- Get the state of an interval timer.  Linux/tv32 version.
> +   Copyright (C) 2020 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 <time.h>
> +#include <sys/time.h>
> +#include <sys/types.h>
> +#include <sysdep.h>
> +#include <tv32-compat.h>
> +
> +int
> +__getitimer64 (__itimer_which_t which, struct __itimerval64
> *curr_value) +{
> +#if __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64
> +  return INLINE_SYSCALL_CALL (getitimer, which, curr_value);
> +#else
> +  struct __itimerval32 curr_value_32;
> +  if (INLINE_SYSCALL_CALL (getitimer, which, &curr_value_32) == -1)
> +    return -1;
> +
> +  /* Write all fields of 'curr_value' regardless of overflow.  */
> +  curr_value->it_interval
> +    = valid_timeval32_to_timeval64 (curr_value_32.it_interval);
> +  curr_value->it_value
> +    = valid_timeval32_to_timeval64 (curr_value_32.it_value);
> +  return 0;
> +#endif
> +}
> +
> +#if __TIMESIZE != 64
> +libc_hidden_def (__getitimer64)
> +int
> +__getitimer (__itimer_which_t which, struct itimerval *curr_value)
> +{
> +  struct __itimerval64 val64;
> +
> +  val64.it_interval
> +    = valid_timeval_to_timeval64 (curr_value->it_interval);
> +  val64.it_value
> +    = valid_timeval_to_timeval64 (curr_value->it_value);
> +
> +  return __getitimer64 (which, &val64);
> +}
> +#endif
> +weak_alias (__getitimer, getitimer)
> diff --git a/sysdeps/unix/sysv/linux/setitimer.c
> b/sysdeps/unix/sysv/linux/setitimer.c new file mode 100644
> index 0000000000..238853dd33
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/setitimer.c
> @@ -0,0 +1,95 @@
> +/* setitimer -- Set the state of an interval timer.  Linux/tv32
> version.
> +   Copyright (C) 2020 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 <time.h>
> +#include <sys/time.h>
> +#include <sys/types.h>
> +#include <sysdep.h>
> +#include <tv32-compat.h>
> +
> +int
> +__setitimer64 (__itimer_which_t which,
> +               const struct __itimerval64 *restrict new_value,
> +               struct __itimerval64 *restrict old_value)
> +{
> +#if __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64
> +  return INLINE_SYSCALL_CALL (setitimer, which, new_value,
> old_value); +#else
> +  struct __itimerval32 new_value_32;
> +
> +  if (! in_time_t_range (new_value->it_interval.tv_sec))
> +  {
> +    __set_errno (EOVERFLOW);
> +    return -1;
> +  }
> +  new_value_32.it_interval
> +    = valid_timeval64_to_timeval32 (new_value->it_interval);
> +
> +  if (! in_time_t_range (new_value->it_value.tv_sec))
> +  {
> +    __set_errno (EOVERFLOW);
> +    return -1;
> +  }
> +  new_value_32.it_value
> +    = valid_timeval64_to_timeval32 (new_value->it_value);
> +
> +  if (old_value == NULL)
> +    return INLINE_SYSCALL_CALL (setitimer, which, &new_value_32,
> NULL); +
> +  struct __itimerval32 old_value_32;
> +  if (INLINE_SYSCALL_CALL (setitimer, which, &new_value_32,
> &old_value_32) == -1)
> +    return -1;
> +
> +  /* Write all fields of 'old_value' regardless of overflow.  */
> +  old_value->it_interval
> +     = valid_timeval32_to_timeval64 (old_value_32.it_interval);
> +  old_value->it_value
> +     = valid_timeval32_to_timeval64 (old_value_32.it_value);
> +  return 0;
> +#endif
> +}
> +
> +#if __TIMESIZE != 64
> +libc_hidden_def (__setitimer64)
> +int
> +__setitimer (__itimer_which_t which,
> +             const struct itimerval *restrict new_value,
> +             struct itimerval *restrict old_value)
> +{
> +  int ret;
> +  struct __itimerval64 new64, old64;
> +
> +  new64.it_interval
> +    = valid_timeval_to_timeval64 (new_value->it_interval);
> +  new64.it_value
> +    = valid_timeval_to_timeval64 (new_value->it_value);
> +
> +  ret = __setitimer64 (which, &new64, old_value ? &old64 : NULL);
> +
> +  if (ret == 0 && old_value)
> +    {
> +      old_value->it_interval
> +        = valid_timeval64_to_timeval (old64.it_interval);
> +      old_value->it_value
> +        = valid_timeval64_to_timeval (old64.it_value);
> +    }
> +
> +  return ret;
> +}
> +#endif
> +weak_alias (__setitimer, setitimer)
> diff --git a/sysdeps/unix/sysv/linux/tv32-compat.h
> b/sysdeps/unix/sysv/linux/tv32-compat.h new file mode 100644
> index 0000000000..b8791b1db8
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/tv32-compat.h
> @@ -0,0 +1,31 @@
> +/* Compatibility definitions for `struct timeval' with 32-bit time_t.
> +   Copyright (C) 2020 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 <bits/types/time_t.h>
> +
> +/* Structures containing 'struct timeval' with 32-bit time_t.  */
> +struct __itimerval32
> +{
> +  struct __timeval32 it_interval;
> +  struct __timeval32 it_value;
> +};
> +
> +#endif /* tv32-compat.h */

Tested-by: Lukasz Majewski <lukma@denx.de>

ARM32 (armv7) with QEMU:
https://github.com/lmajewski/meta-y2038/blob/master/README

Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma@denx.de
Lukasz Majewski Feb. 28, 2020, 4:56 p.m. UTC | #2
Dear Community,

> Hi Alistair,
> 
> > The Linux kernel expects itimerval to use a 32-bit time_t, even on
> > archs with a 64-bit time_t (like RV32). To address this let's
> > convert itimerval to/from 32-bit and 64-bit to ensure the kernel
> > always gets a 32-bit time_t.
> > 
> > While we are converting these functions let's also convert them to
> > be the y2038 safe versions. This means there is a *64 function that
> > is called by a backwards compatible wrapper.
> > ---
> >  include/time.h                        | 15 +++++
> >  sysdeps/unix/syscalls.list            |  2 -
> >  sysdeps/unix/sysv/linux/getitimer.c   | 59 +++++++++++++++++
> >  sysdeps/unix/sysv/linux/setitimer.c   | 95
> > +++++++++++++++++++++++++++ sysdeps/unix/sysv/linux/tv32-compat.h |
> > 31 +++++++++ 5 files changed, 200 insertions(+), 2 deletions(-)
> >  create mode 100644 sysdeps/unix/sysv/linux/getitimer.c
> >  create mode 100644 sysdeps/unix/sysv/linux/setitimer.c
> >  create mode 100644 sysdeps/unix/sysv/linux/tv32-compat.h
> > 
> > diff --git a/include/time.h b/include/time.h
> > index 8a4abb159f..eaa536d5c0 100644
> > --- a/include/time.h
> > +++ b/include/time.h
> > @@ -6,6 +6,7 @@
> >  # include <bits/types/locale_t.h>
> >  # include <stdbool.h>
> >  # include <time/mktime-internal.h>
> > +# include <sys/time.h>
> >  # include <endian.h>
> >  # include <time-clockid.h>
> >  # include <sys/time.h>
> > @@ -119,6 +120,20 @@ struct __itimerval64
> >  };
> >  #endif
> >  
> > +#if __TIMESIZE == 64
> > +# define __getitimer64 __getitimer
> > +# define __setitimer64 __setitimer
> > +#else
> > +extern int __getitimer64 (enum __itimer_which __which,
> > +                          struct __itimerval64 *__value);
> > +
> > +libc_hidden_proto (__getitimer64)
> > +extern int __setitimer64 (enum __itimer_which __which,
> > +                          const struct __itimerval64 *__restrict
> > __new,
> > +                          struct __itimerval64 *__restrict __old);
> > +libc_hidden_proto (__setitimer64)
> > +#endif
> > +
> >  #if __TIMESIZE == 64
> >  # define __ctime64 ctime
> >  #else
> > diff --git a/sysdeps/unix/syscalls.list b/sysdeps/unix/syscalls.list
> > index e28e801c7a..d249049d6e 100644
> > --- a/sysdeps/unix/syscalls.list
> > +++ b/sysdeps/unix/syscalls.list
> > @@ -25,7 +25,6 @@ getgid		-	getgid
> > 	Ei:	__getgid	getgid getgroups	-
> > getgroups	i:ip	__getgroups	getgroups
> > gethostid	-	gethostid	i:	gethostid
> > gethostname	-	gethostname	i:bn
> > __gethostname	gethostname -getitimer	-
> > getitimer	i:ip	__getitimer	getitimer
> > getpeername	-	getpeername	i:ibN
> > __getpeername	getpeername getpid		-
> > getpid		Ei:	__getpid	getpid
> > getpriority	-	getpriority	i:ii
> > __getpriority	getpriority @@ -67,7 +66,6 @@ setgid
> > 	-	setgid		i:i	__setgid
> > setgid setgroups	-	setgroups	i:ip
> > setgroups sethostid	-	sethostid	i:i
> > sethostid sethostname	-	sethostname	i:pi
> > sethostname -setitimer	-	setitimer	i:ipp
> > __setitimer	setitimer setpgid		-
> > setpgrp		i:ii	__setpgid	setpgid
> > setpriority	-	setpriority	i:iii
> > __setpriority	setpriority setregid	-
> > setregid	i:ii	__setregid	setregid diff --git
> > a/sysdeps/unix/sysv/linux/getitimer.c
> > b/sysdeps/unix/sysv/linux/getitimer.c new file mode 100644 index
> > 0000000000..12f7963949 --- /dev/null +++
> > b/sysdeps/unix/sysv/linux/getitimer.c @@ -0,0 +1,59 @@ +/* getitimer
> > -- Get the state of an interval timer.  Linux/tv32 version.
> > +   Copyright (C) 2020 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 <time.h>
> > +#include <sys/time.h>
> > +#include <sys/types.h>
> > +#include <sysdep.h>
> > +#include <tv32-compat.h>
> > +
> > +int
> > +__getitimer64 (__itimer_which_t which, struct __itimerval64
> > *curr_value) +{
> > +#if __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64
> > +  return INLINE_SYSCALL_CALL (getitimer, which, curr_value);
> > +#else
> > +  struct __itimerval32 curr_value_32;
> > +  if (INLINE_SYSCALL_CALL (getitimer, which, &curr_value_32) == -1)
> > +    return -1;
> > +
> > +  /* Write all fields of 'curr_value' regardless of overflow.  */
> > +  curr_value->it_interval
> > +    = valid_timeval32_to_timeval64 (curr_value_32.it_interval);
> > +  curr_value->it_value
> > +    = valid_timeval32_to_timeval64 (curr_value_32.it_value);
> > +  return 0;
> > +#endif
> > +}
> > +
> > +#if __TIMESIZE != 64
> > +libc_hidden_def (__getitimer64)
> > +int
> > +__getitimer (__itimer_which_t which, struct itimerval *curr_value)
> > +{
> > +  struct __itimerval64 val64;
> > +
> > +  val64.it_interval
> > +    = valid_timeval_to_timeval64 (curr_value->it_interval);
> > +  val64.it_value
> > +    = valid_timeval_to_timeval64 (curr_value->it_value);
> > +
> > +  return __getitimer64 (which, &val64);
> > +}
> > +#endif
> > +weak_alias (__getitimer, getitimer)
> > diff --git a/sysdeps/unix/sysv/linux/setitimer.c
> > b/sysdeps/unix/sysv/linux/setitimer.c new file mode 100644
> > index 0000000000..238853dd33
> > --- /dev/null
> > +++ b/sysdeps/unix/sysv/linux/setitimer.c
> > @@ -0,0 +1,95 @@
> > +/* setitimer -- Set the state of an interval timer.  Linux/tv32
> > version.
> > +   Copyright (C) 2020 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 <time.h>
> > +#include <sys/time.h>
> > +#include <sys/types.h>
> > +#include <sysdep.h>
> > +#include <tv32-compat.h>
> > +
> > +int
> > +__setitimer64 (__itimer_which_t which,
> > +               const struct __itimerval64 *restrict new_value,
> > +               struct __itimerval64 *restrict old_value)
> > +{
> > +#if __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64
> > +  return INLINE_SYSCALL_CALL (setitimer, which, new_value,
> > old_value); +#else
> > +  struct __itimerval32 new_value_32;
> > +
> > +  if (! in_time_t_range (new_value->it_interval.tv_sec))
> > +  {
> > +    __set_errno (EOVERFLOW);
> > +    return -1;
> > +  }
> > +  new_value_32.it_interval
> > +    = valid_timeval64_to_timeval32 (new_value->it_interval);
> > +
> > +  if (! in_time_t_range (new_value->it_value.tv_sec))
> > +  {
> > +    __set_errno (EOVERFLOW);
> > +    return -1;
> > +  }
> > +  new_value_32.it_value
> > +    = valid_timeval64_to_timeval32 (new_value->it_value);
> > +
> > +  if (old_value == NULL)
> > +    return INLINE_SYSCALL_CALL (setitimer, which, &new_value_32,
> > NULL); +
> > +  struct __itimerval32 old_value_32;
> > +  if (INLINE_SYSCALL_CALL (setitimer, which, &new_value_32,
> > &old_value_32) == -1)
> > +    return -1;
> > +
> > +  /* Write all fields of 'old_value' regardless of overflow.  */
> > +  old_value->it_interval
> > +     = valid_timeval32_to_timeval64 (old_value_32.it_interval);
> > +  old_value->it_value
> > +     = valid_timeval32_to_timeval64 (old_value_32.it_value);
> > +  return 0;
> > +#endif
> > +}
> > +
> > +#if __TIMESIZE != 64
> > +libc_hidden_def (__setitimer64)
> > +int
> > +__setitimer (__itimer_which_t which,
> > +             const struct itimerval *restrict new_value,
> > +             struct itimerval *restrict old_value)
> > +{
> > +  int ret;
> > +  struct __itimerval64 new64, old64;
> > +
> > +  new64.it_interval
> > +    = valid_timeval_to_timeval64 (new_value->it_interval);
> > +  new64.it_value
> > +    = valid_timeval_to_timeval64 (new_value->it_value);
> > +
> > +  ret = __setitimer64 (which, &new64, old_value ? &old64 : NULL);
> > +
> > +  if (ret == 0 && old_value)
> > +    {
> > +      old_value->it_interval
> > +        = valid_timeval64_to_timeval (old64.it_interval);
> > +      old_value->it_value
> > +        = valid_timeval64_to_timeval (old64.it_value);
> > +    }
> > +
> > +  return ret;
> > +}
> > +#endif
> > +weak_alias (__setitimer, setitimer)
> > diff --git a/sysdeps/unix/sysv/linux/tv32-compat.h
> > b/sysdeps/unix/sysv/linux/tv32-compat.h new file mode 100644
> > index 0000000000..b8791b1db8
> > --- /dev/null
> > +++ b/sysdeps/unix/sysv/linux/tv32-compat.h
> > @@ -0,0 +1,31 @@
> > +/* Compatibility definitions for `struct timeval' with 32-bit
> > time_t.
> > +   Copyright (C) 2020 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 <bits/types/time_t.h>
> > +
> > +/* Structures containing 'struct timeval' with 32-bit time_t.  */
> > +struct __itimerval32
> > +{
> > +  struct __timeval32 it_interval;
> > +  struct __timeval32 it_value;
> > +};
> > +
> > +#endif /* tv32-compat.h */  
> 
> Tested-by: Lukasz Majewski <lukma@denx.de>
> 
> ARM32 (armv7) with QEMU:
> https://github.com/lmajewski/meta-y2038/blob/master/README
> 

Are there any more comments regarding this patch set? Is it eligible
for pulling?

> Best regards,
> 
> Lukasz Majewski
> 
> --
> 
> DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
> Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email:
> lukma@denx.de




Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma@denx.de
diff mbox

Patch

diff --git a/include/time.h b/include/time.h
index 8a4abb159f..eaa536d5c0 100644
--- a/include/time.h
+++ b/include/time.h
@@ -6,6 +6,7 @@ 
 # include <bits/types/locale_t.h>
 # include <stdbool.h>
 # include <time/mktime-internal.h>
+# include <sys/time.h>
 # include <endian.h>
 # include <time-clockid.h>
 # include <sys/time.h>
@@ -119,6 +120,20 @@  struct __itimerval64
 };
 #endif
 
+#if __TIMESIZE == 64
+# define __getitimer64 __getitimer
+# define __setitimer64 __setitimer
+#else
+extern int __getitimer64 (enum __itimer_which __which,
+                          struct __itimerval64 *__value);
+
+libc_hidden_proto (__getitimer64)
+extern int __setitimer64 (enum __itimer_which __which,
+                          const struct __itimerval64 *__restrict __new,
+                          struct __itimerval64 *__restrict __old);
+libc_hidden_proto (__setitimer64)
+#endif
+
 #if __TIMESIZE == 64
 # define __ctime64 ctime
 #else
diff --git a/sysdeps/unix/syscalls.list b/sysdeps/unix/syscalls.list
index e28e801c7a..d249049d6e 100644
--- a/sysdeps/unix/syscalls.list
+++ b/sysdeps/unix/syscalls.list
@@ -25,7 +25,6 @@  getgid		-	getgid		Ei:	__getgid	getgid
 getgroups	-	getgroups	i:ip	__getgroups	getgroups
 gethostid	-	gethostid	i:	gethostid
 gethostname	-	gethostname	i:bn	__gethostname	gethostname
-getitimer	-	getitimer	i:ip	__getitimer	getitimer
 getpeername	-	getpeername	i:ibN	__getpeername	getpeername
 getpid		-	getpid		Ei:	__getpid	getpid
 getpriority	-	getpriority	i:ii	__getpriority	getpriority
@@ -67,7 +66,6 @@  setgid		-	setgid		i:i	__setgid	setgid
 setgroups	-	setgroups	i:ip	setgroups
 sethostid	-	sethostid	i:i	sethostid
 sethostname	-	sethostname	i:pi	sethostname
-setitimer	-	setitimer	i:ipp	__setitimer	setitimer
 setpgid		-	setpgrp		i:ii	__setpgid	setpgid
 setpriority	-	setpriority	i:iii	__setpriority	setpriority
 setregid	-	setregid	i:ii	__setregid	setregid
diff --git a/sysdeps/unix/sysv/linux/getitimer.c b/sysdeps/unix/sysv/linux/getitimer.c
new file mode 100644
index 0000000000..12f7963949
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/getitimer.c
@@ -0,0 +1,59 @@ 
+/* getitimer -- Get the state of an interval timer.  Linux/tv32 version.
+   Copyright (C) 2020 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 <time.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sysdep.h>
+#include <tv32-compat.h>
+
+int
+__getitimer64 (__itimer_which_t which, struct __itimerval64 *curr_value)
+{
+#if __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64
+  return INLINE_SYSCALL_CALL (getitimer, which, curr_value);
+#else
+  struct __itimerval32 curr_value_32;
+  if (INLINE_SYSCALL_CALL (getitimer, which, &curr_value_32) == -1)
+    return -1;
+
+  /* Write all fields of 'curr_value' regardless of overflow.  */
+  curr_value->it_interval
+    = valid_timeval32_to_timeval64 (curr_value_32.it_interval);
+  curr_value->it_value
+    = valid_timeval32_to_timeval64 (curr_value_32.it_value);
+  return 0;
+#endif
+}
+
+#if __TIMESIZE != 64
+libc_hidden_def (__getitimer64)
+int
+__getitimer (__itimer_which_t which, struct itimerval *curr_value)
+{
+  struct __itimerval64 val64;
+
+  val64.it_interval
+    = valid_timeval_to_timeval64 (curr_value->it_interval);
+  val64.it_value
+    = valid_timeval_to_timeval64 (curr_value->it_value);
+
+  return __getitimer64 (which, &val64);
+}
+#endif
+weak_alias (__getitimer, getitimer)
diff --git a/sysdeps/unix/sysv/linux/setitimer.c b/sysdeps/unix/sysv/linux/setitimer.c
new file mode 100644
index 0000000000..238853dd33
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/setitimer.c
@@ -0,0 +1,95 @@ 
+/* setitimer -- Set the state of an interval timer.  Linux/tv32 version.
+   Copyright (C) 2020 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 <time.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sysdep.h>
+#include <tv32-compat.h>
+
+int
+__setitimer64 (__itimer_which_t which,
+               const struct __itimerval64 *restrict new_value,
+               struct __itimerval64 *restrict old_value)
+{
+#if __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64
+  return INLINE_SYSCALL_CALL (setitimer, which, new_value, old_value);
+#else
+  struct __itimerval32 new_value_32;
+
+  if (! in_time_t_range (new_value->it_interval.tv_sec))
+  {
+    __set_errno (EOVERFLOW);
+    return -1;
+  }
+  new_value_32.it_interval
+    = valid_timeval64_to_timeval32 (new_value->it_interval);
+
+  if (! in_time_t_range (new_value->it_value.tv_sec))
+  {
+    __set_errno (EOVERFLOW);
+    return -1;
+  }
+  new_value_32.it_value
+    = valid_timeval64_to_timeval32 (new_value->it_value);
+
+  if (old_value == NULL)
+    return INLINE_SYSCALL_CALL (setitimer, which, &new_value_32, NULL);
+
+  struct __itimerval32 old_value_32;
+  if (INLINE_SYSCALL_CALL (setitimer, which, &new_value_32, &old_value_32) == -1)
+    return -1;
+
+  /* Write all fields of 'old_value' regardless of overflow.  */
+  old_value->it_interval
+     = valid_timeval32_to_timeval64 (old_value_32.it_interval);
+  old_value->it_value
+     = valid_timeval32_to_timeval64 (old_value_32.it_value);
+  return 0;
+#endif
+}
+
+#if __TIMESIZE != 64
+libc_hidden_def (__setitimer64)
+int
+__setitimer (__itimer_which_t which,
+             const struct itimerval *restrict new_value,
+             struct itimerval *restrict old_value)
+{
+  int ret;
+  struct __itimerval64 new64, old64;
+
+  new64.it_interval
+    = valid_timeval_to_timeval64 (new_value->it_interval);
+  new64.it_value
+    = valid_timeval_to_timeval64 (new_value->it_value);
+
+  ret = __setitimer64 (which, &new64, old_value ? &old64 : NULL);
+
+  if (ret == 0 && old_value)
+    {
+      old_value->it_interval
+        = valid_timeval64_to_timeval (old64.it_interval);
+      old_value->it_value
+        = valid_timeval64_to_timeval (old64.it_value);
+    }
+
+  return ret;
+}
+#endif
+weak_alias (__setitimer, setitimer)
diff --git a/sysdeps/unix/sysv/linux/tv32-compat.h b/sysdeps/unix/sysv/linux/tv32-compat.h
new file mode 100644
index 0000000000..b8791b1db8
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/tv32-compat.h
@@ -0,0 +1,31 @@ 
+/* Compatibility definitions for `struct timeval' with 32-bit time_t.
+   Copyright (C) 2020 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 <bits/types/time_t.h>
+
+/* Structures containing 'struct timeval' with 32-bit time_t.  */
+struct __itimerval32
+{
+  struct __timeval32 it_interval;
+  struct __timeval32 it_value;
+};
+
+#endif /* tv32-compat.h */