[06/16] linux: Consolidate fxstatat{64}

Message ID 20200723194641.1949404-7-adhemerval.zanella@linaro.org
State New
Headers show
Series
  • Add y2038 support for stat functions
Related show

Commit Message

Vitaly Buka via Libc-alpha July 23, 2020, 7:46 p.m.
The LFS support is implemented on fxstat64.c, instead of fxstat.c for
64-bit architectures.  The fxstatat.c implements the non-LFS and it is
a no-op for !XSTAT_IS_XSTAT64.

The generic non-LFS implementation handles two cases:

  1. New kABIs which uses generic pre 64-bit time Linux ABI (csky and
     nios): it issues __NR_fstatat64 plus handle the overflow on st_ino,
     st_size, or st_blocks.  It only handles _STAT_VER_KERNEL.

  2. Old kABIs with old non-LFS support (arm, i386, hppa, m68k, mips32,
     microblaze, s390, sh, powerpc, and sparc32).  it issues
     __NR_fstatat64 and convert to non-LFS stat struct based on the
     version.

Also non-LFS mips64 is an outlier and it has its own implementation
since _STAT_VER_LINUX requires a different conversion function (it
uses the kernel_stat as the sysissues argument since its exported ABI
is different than the kernel one for both non-LFS and LFS
implementation).

The generic LFS implementation handles multiple cases:

  1. XSTAT_IS_XSTAT64 being 1:

    1.1. 64-bit kABI (aarch64, ia64, powerpc64*, s390x, riscv64, and
         x86_64): it issues __NR_newfstatat for _STAT_VER_KERNEL or
         _STAT_VER_LINUX.

    1.2. 64-bit kABI outlier (sparc64): it issuess fstatat64 with a
         temporary stat64 and convert to output stat64 based on the
         input version (and using a sparc64 specific __xstat32_conv).

    1.3. New 32-bit kABIs with only 64-bit time_t support (arc and
	 riscv32): it issues __NR_statx and covert to struct stat64.

  2. Old ABIs with XSTAT_IS_XSTAT64 being 0 (arm, csky, i386, hppa, m68k,
     microblaze, mips32, nios2, sh, powerpc32, and sparc32): it issues
     __NR_fstat64.

Also, two special cases requires specific implementations:

  1. alpha: it uses the __NR_fstatat64 syscall instead.

  2. mips64: as for non-LFS implementation its ABIs differ from
     glibc exported one, which requires an specific conversion
     function to handle the kernel_stat.

Checked with a build for all affected ABIs. I also checked on x86_64,
i686, powerpc, powerpc64le, sparcv9, sparc64, s390, and s390x.
---
 sysdeps/unix/sysv/linux/Makefile              |  3 +-
 sysdeps/unix/sysv/linux/alpha/dl-fxstatat64.c |  1 -
 sysdeps/unix/sysv/linux/alpha/fxstatat.c      | 52 ---------------
 .../wordsize-32 => alpha}/fxstatat64.c        | 35 +++++-----
 sysdeps/unix/sysv/linux/arm/fxstatat.c        |  1 -
 sysdeps/unix/sysv/linux/fxstatat.c            | 53 ++++++---------
 sysdeps/unix/sysv/linux/fxstatat64.c          | 65 +++++++++++--------
 .../sysv/linux/generic/wordsize-32/fxstatat.c | 56 ----------------
 sysdeps/unix/sysv/linux/hppa/fxstatat.c       |  1 -
 sysdeps/unix/sysv/linux/i386/fxstatat.c       | 54 ---------------
 sysdeps/unix/sysv/linux/m68k/fxstatat.c       |  1 -
 sysdeps/unix/sysv/linux/microblaze/fxstatat.c |  1 -
 .../unix/sysv/linux/mips/mips32/fxstatat.c    |  1 -
 .../{wordsize-64 => mips/mips64}/fxstatat.c   | 33 +++-------
 .../unix/sysv/linux/mips/mips64/fxstatat64.c  | 28 ++------
 .../sysv/linux/powerpc/powerpc32/fxstatat.c   |  1 -
 .../unix/sysv/linux/s390/s390-32/fxstatat.c   |  1 -
 sysdeps/unix/sysv/linux/sh/fxstatat.c         |  1 -
 .../unix/sysv/linux/sparc/sparc32/fxstatat.c  |  1 -
 .../sysv/linux/sparc/sparc64/dl-fxstatat64.c  |  1 -
 .../unix/sysv/linux/sparc/sparc64/fxstatat.c  |  1 -
 .../sysv/linux/wordsize-64/dl-fxstatat64.c    |  1 -
 .../unix/sysv/linux/wordsize-64/fxstatat64.c  |  1 -
 23 files changed, 92 insertions(+), 301 deletions(-)
 delete mode 100644 sysdeps/unix/sysv/linux/alpha/dl-fxstatat64.c
 delete mode 100644 sysdeps/unix/sysv/linux/alpha/fxstatat.c
 rename sysdeps/unix/sysv/linux/{generic/wordsize-32 => alpha}/fxstatat64.c (53%)
 delete mode 100644 sysdeps/unix/sysv/linux/arm/fxstatat.c
 delete mode 100644 sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat.c
 delete mode 100644 sysdeps/unix/sysv/linux/hppa/fxstatat.c
 delete mode 100644 sysdeps/unix/sysv/linux/i386/fxstatat.c
 delete mode 100644 sysdeps/unix/sysv/linux/m68k/fxstatat.c
 delete mode 100644 sysdeps/unix/sysv/linux/microblaze/fxstatat.c
 delete mode 100644 sysdeps/unix/sysv/linux/mips/mips32/fxstatat.c
 rename sysdeps/unix/sysv/linux/{wordsize-64 => mips/mips64}/fxstatat.c (56%)
 delete mode 100644 sysdeps/unix/sysv/linux/powerpc/powerpc32/fxstatat.c
 delete mode 100644 sysdeps/unix/sysv/linux/s390/s390-32/fxstatat.c
 delete mode 100644 sysdeps/unix/sysv/linux/sh/fxstatat.c
 delete mode 100644 sysdeps/unix/sysv/linux/sparc/sparc32/fxstatat.c
 delete mode 100644 sysdeps/unix/sysv/linux/sparc/sparc64/dl-fxstatat64.c
 delete mode 100644 sysdeps/unix/sysv/linux/sparc/sparc64/fxstatat.c
 delete mode 100644 sysdeps/unix/sysv/linux/wordsize-64/dl-fxstatat64.c
 delete mode 100644 sysdeps/unix/sysv/linux/wordsize-64/fxstatat64.c

-- 
2.25.1

Comments

Lukasz Majewski July 24, 2020, 9:14 a.m. | #1
On Thu, 23 Jul 2020 16:46:31 -0300
Adhemerval Zanella <adhemerval.zanella@linaro.org> wrote:

> The LFS support is implemented on fxstat64.c, instead of fxstat.c for

> 64-bit architectures.  The fxstatat.c implements the non-LFS and it is

> a no-op for !XSTAT_IS_XSTAT64.

> 

> The generic non-LFS implementation handles two cases:

> 

>   1. New kABIs which uses generic pre 64-bit time Linux ABI (csky and

>      nios): it issues __NR_fstatat64 plus handle the overflow on

> st_ino, st_size, or st_blocks.  It only handles _STAT_VER_KERNEL.

> 

>   2. Old kABIs with old non-LFS support (arm, i386, hppa, m68k,

> mips32, microblaze, s390, sh, powerpc, and sparc32).  it issues

>      __NR_fstatat64 and convert to non-LFS stat struct based on the

>      version.

> 

> Also non-LFS mips64 is an outlier and it has its own implementation

> since _STAT_VER_LINUX requires a different conversion function (it

> uses the kernel_stat as the sysissues argument since its exported ABI

> is different than the kernel one for both non-LFS and LFS

> implementation).

> 

> The generic LFS implementation handles multiple cases:

> 

>   1. XSTAT_IS_XSTAT64 being 1:

> 

>     1.1. 64-bit kABI (aarch64, ia64, powerpc64*, s390x, riscv64, and

>          x86_64): it issues __NR_newfstatat for _STAT_VER_KERNEL or

>          _STAT_VER_LINUX.

> 

>     1.2. 64-bit kABI outlier (sparc64): it issuess fstatat64 with a

>          temporary stat64 and convert to output stat64 based on the

>          input version (and using a sparc64 specific __xstat32_conv).

> 

>     1.3. New 32-bit kABIs with only 64-bit time_t support (arc and

> 	 riscv32): it issues __NR_statx and covert to struct stat64.

> 

>   2. Old ABIs with XSTAT_IS_XSTAT64 being 0 (arm, csky, i386, hppa,

> m68k, microblaze, mips32, nios2, sh, powerpc32, and sparc32): it

> issues __NR_fstat64.

> 

> Also, two special cases requires specific implementations:

> 

>   1. alpha: it uses the __NR_fstatat64 syscall instead.

> 

>   2. mips64: as for non-LFS implementation its ABIs differ from

>      glibc exported one, which requires an specific conversion

>      function to handle the kernel_stat.

> 

> Checked with a build for all affected ABIs. I also checked on x86_64,

> i686, powerpc, powerpc64le, sparcv9, sparc64, s390, and s390x.


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


> ---

>  sysdeps/unix/sysv/linux/Makefile              |  3 +-

>  sysdeps/unix/sysv/linux/alpha/dl-fxstatat64.c |  1 -

>  sysdeps/unix/sysv/linux/alpha/fxstatat.c      | 52 ---------------

>  .../wordsize-32 => alpha}/fxstatat64.c        | 35 +++++-----

>  sysdeps/unix/sysv/linux/arm/fxstatat.c        |  1 -

>  sysdeps/unix/sysv/linux/fxstatat.c            | 53 ++++++---------

>  sysdeps/unix/sysv/linux/fxstatat64.c          | 65

> +++++++++++-------- .../sysv/linux/generic/wordsize-32/fxstatat.c |

> 56 ---------------- sysdeps/unix/sysv/linux/hppa/fxstatat.c       |

> 1 - sysdeps/unix/sysv/linux/i386/fxstatat.c       | 54 ---------------

>  sysdeps/unix/sysv/linux/m68k/fxstatat.c       |  1 -

>  sysdeps/unix/sysv/linux/microblaze/fxstatat.c |  1 -

>  .../unix/sysv/linux/mips/mips32/fxstatat.c    |  1 -

>  .../{wordsize-64 => mips/mips64}/fxstatat.c   | 33 +++-------

>  .../unix/sysv/linux/mips/mips64/fxstatat64.c  | 28 ++------

>  .../sysv/linux/powerpc/powerpc32/fxstatat.c   |  1 -

>  .../unix/sysv/linux/s390/s390-32/fxstatat.c   |  1 -

>  sysdeps/unix/sysv/linux/sh/fxstatat.c         |  1 -

>  .../unix/sysv/linux/sparc/sparc32/fxstatat.c  |  1 -

>  .../sysv/linux/sparc/sparc64/dl-fxstatat64.c  |  1 -

>  .../unix/sysv/linux/sparc/sparc64/fxstatat.c  |  1 -

>  .../sysv/linux/wordsize-64/dl-fxstatat64.c    |  1 -

>  .../unix/sysv/linux/wordsize-64/fxstatat64.c  |  1 -

>  23 files changed, 92 insertions(+), 301 deletions(-)

>  delete mode 100644 sysdeps/unix/sysv/linux/alpha/dl-fxstatat64.c

>  delete mode 100644 sysdeps/unix/sysv/linux/alpha/fxstatat.c

>  rename sysdeps/unix/sysv/linux/{generic/wordsize-32 =>

> alpha}/fxstatat64.c (53%) delete mode 100644

> sysdeps/unix/sysv/linux/arm/fxstatat.c delete mode 100644

> sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat.c delete mode

> 100644 sysdeps/unix/sysv/linux/hppa/fxstatat.c delete mode 100644

> sysdeps/unix/sysv/linux/i386/fxstatat.c delete mode 100644

> sysdeps/unix/sysv/linux/m68k/fxstatat.c delete mode 100644

> sysdeps/unix/sysv/linux/microblaze/fxstatat.c delete mode 100644

> sysdeps/unix/sysv/linux/mips/mips32/fxstatat.c rename

> sysdeps/unix/sysv/linux/{wordsize-64 => mips/mips64}/fxstatat.c (56%)

> delete mode 100644

> sysdeps/unix/sysv/linux/powerpc/powerpc32/fxstatat.c delete mode

> 100644 sysdeps/unix/sysv/linux/s390/s390-32/fxstatat.c delete mode

> 100644 sysdeps/unix/sysv/linux/sh/fxstatat.c delete mode 100644

> sysdeps/unix/sysv/linux/sparc/sparc32/fxstatat.c delete mode 100644

> sysdeps/unix/sysv/linux/sparc/sparc64/dl-fxstatat64.c delete mode

> 100644 sysdeps/unix/sysv/linux/sparc/sparc64/fxstatat.c delete mode

> 100644 sysdeps/unix/sysv/linux/wordsize-64/dl-fxstatat64.c delete

> mode 100644 sysdeps/unix/sysv/linux/wordsize-64/fxstatat64.c

> 

> diff --git a/sysdeps/unix/sysv/linux/Makefile

> b/sysdeps/unix/sysv/linux/Makefile index 9b2a253032..3c28adae0d 100644

> --- a/sysdeps/unix/sysv/linux/Makefile

> +++ b/sysdeps/unix/sysv/linux/Makefile

> @@ -280,8 +280,7 @@ tests += tst-fallocate tst-fallocate64

> tst-o_path-locks endif

>  

>  ifeq ($(subdir),elf)

> -sysdep-rtld-routines += dl-brk dl-sbrk dl-getcwd dl-openat64

> dl-opendir \

> -			dl-fxstatat64

> +sysdep-rtld-routines += dl-brk dl-sbrk dl-getcwd dl-openat64

> dl-opendir 

>  libof-lddlibc4 = lddlibc4

>  

> diff --git a/sysdeps/unix/sysv/linux/alpha/dl-fxstatat64.c

> b/sysdeps/unix/sysv/linux/alpha/dl-fxstatat64.c deleted file mode

> 100644 index 330b33f7c7..0000000000

> --- a/sysdeps/unix/sysv/linux/alpha/dl-fxstatat64.c

> +++ /dev/null

> @@ -1 +0,0 @@

> -#include "fxstatat.c"

> diff --git a/sysdeps/unix/sysv/linux/alpha/fxstatat.c

> b/sysdeps/unix/sysv/linux/alpha/fxstatat.c deleted file mode 100644

> index c5953d250a..0000000000

> --- a/sysdeps/unix/sysv/linux/alpha/fxstatat.c

> +++ /dev/null

> @@ -1,52 +0,0 @@

> -/* Copyright (C) 2005-2020 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

> -   <https://www.gnu.org/licenses/>.  */

> -

> -#define __fxstatat64 __fxstatat64_disable

> -

> -#include <errno.h>

> -#include <fcntl.h>

> -#include <stddef.h>

> -#include <stdio.h>

> -#include <sys/stat.h>

> -#include <kernel_stat.h>

> -#include <sysdep.h>

> -#include <sys/syscall.h>

> -#include <xstatconv.h>

> -

> -#undef __fxstatat64

> -

> -/* Get information about the file NAME in BUF.  */

> -int

> -__fxstatat (int vers, int fd, const char *file, struct stat *st, int

> flag) -{

> -  int result, errno_out;

> -

> -  /* ??? The __fxstatat entry point is new enough that it must be

> using

> -     vers == _STAT_VER_KERNEL64.  For the benefit of

> dl-fxstatat64.c, we

> -     cannot actually check this, lest the compiler not optimize the

> rest

> -     of the function away.  */

> -

> -  result = INTERNAL_SYSCALL_CALL (fstatat64, fd, file, st, flag);

> -  if (__glibc_likely (!INTERNAL_SYSCALL_ERROR_P (result)))

> -    return result;

> -  errno_out = INTERNAL_SYSCALL_ERRNO (result);

> -  __set_errno (errno_out);

> -  return -1;

> -}

> -libc_hidden_def (__fxstatat)

> -strong_alias (__fxstatat, __fxstatat64);

> -libc_hidden_ver(__fxstatat, __fxstatat64);

> diff --git a/sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat64.c

> b/sysdeps/unix/sysv/linux/alpha/fxstatat64.c similarity index 53%

> rename from sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat64.c

> rename to sysdeps/unix/sysv/linux/alpha/fxstatat64.c

> index 894f6dd396..f10c1d31e8 100644

> --- a/sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat64.c

> +++ b/sysdeps/unix/sysv/linux/alpha/fxstatat64.c

> @@ -1,7 +1,6 @@

> -/* __fxstatat64 () implementation.

> -   Copyright (C) 2016-2020 Free Software Foundation, Inc.

> +/* fxstat using old-style Unix stat system call.

> +   Copyright (C) 2004-2020 Free Software Foundation, Inc.

>     This file is part of the GNU C Library.

> -   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.

>  

>     The GNU C Library is free software; you can redistribute it and/or

>     modify it under the terms of the GNU Lesser General Public

> @@ -17,21 +16,21 @@

>     License along with the GNU C Library.  If not, see

>     <https://www.gnu.org/licenses/>.  */

>  

> -/* Hide the prototype for __fxstatat so that GCC will not complain

> about

> -   the different function signature if it is aliased to

> __fxstatat64.

> -   If XSTAT_IS_XSTAT64 is set to non-zero then the stat and stat64

> structures

> -   have an identical layout but different type names.  */

> -

> -#define __fxstatat __fxstatat_disable

> -

> +#define __fxstatat __redirect___fxstatat64

>  #include <sys/stat.h>

> -#undef _STAT_VER_LINUX

> -#define _STAT_VER_LINUX _STAT_VER_KERNEL

> -

> -#include <sysdeps/unix/sysv/linux/fxstatat64.c>

> -

>  #undef __fxstatat

> -#if XSTAT_IS_XSTAT64

> -weak_alias (__fxstatat64, __fxstatat)

> -libc_hidden_ver (__fxstatat64, __fxstatat)

> +#include <kernel_stat.h>

> +#include <sysdep.h>

> +#include <xstatconv.h>

> +

> +/* Get information about the file NAME in BUF.  */

> +int

> +__fxstatat64 (int vers, int fd, const char *file, struct stat64 *st,

> int flag) +{

> +  return INLINE_SYSCALL_CALL (fstatat64, fd, file, st, flag);

> +}

> +libc_hidden_def (__fxstatat64)

> +#if IS_IN(libc)

> +strong_alias (__fxstatat64, __fxstatat);

> +hidden_ver (__fxstatat64, __fxstatat)

>  #endif

> diff --git a/sysdeps/unix/sysv/linux/arm/fxstatat.c

> b/sysdeps/unix/sysv/linux/arm/fxstatat.c deleted file mode 100644

> index 0f8b3135d8..0000000000

> --- a/sysdeps/unix/sysv/linux/arm/fxstatat.c

> +++ /dev/null

> @@ -1 +0,0 @@

> -#include <sysdeps/unix/sysv/linux/i386/fxstatat.c>

> diff --git a/sysdeps/unix/sysv/linux/fxstatat.c

> b/sysdeps/unix/sysv/linux/fxstatat.c index 937fec45c2..0291a2c598

> 100644 --- a/sysdeps/unix/sysv/linux/fxstatat.c

> +++ b/sysdeps/unix/sysv/linux/fxstatat.c

> @@ -1,4 +1,5 @@

> -/* Copyright (C) 2005-2020 Free Software Foundation, Inc.

> +/* fxstatat used on fstatat, Linux implementation.

> +   Copyright (C) 2005-2020 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

> @@ -15,48 +16,36 @@

>     License along with the GNU C Library; if not, see

>     <https://www.gnu.org/licenses/>.  */

>  

> -/* Ho hum, if fxstatat == fxstatat64 we must get rid of the

> prototype or gcc

> -   will complain since they don't strictly match.  */

> -#define __fxstatat64 __fxstatat64_disable

> -

> -#include <errno.h>

> -#include <fcntl.h>

> -#include <stddef.h>

> -#include <stdio.h>

> -#include <string.h>

>  #include <sys/stat.h>

> +#include <fcntl.h>

>  #include <kernel_stat.h>

> -

>  #include <sysdep.h>

> -#include <sys/syscall.h>

>  

> -#include <xstatconv.h>

> +#if !XSTAT_IS_XSTAT64

> +# include <xstatconv.h>

> +# include <xstatover.h>

>  

> -/* Get information about the file NAME in BUF.  */

> +/* Get information about the file FD in BUF.  */

>  int

>  __fxstatat (int vers, int fd, const char *file, struct stat *st, int

> flag) {

> -  int result;

>  #if STAT_IS_KERNEL_STAT

> -# define kst (*st)

> -#else

> -  struct kernel_stat kst;

> -#endif

> -

> -  result = INTERNAL_SYSCALL_CALL (newfstatat, fd, file, &kst, flag);

> -  if (!__glibc_likely (INTERNAL_SYSCALL_ERROR_P (result)))

> +  /* New kABIs which uses generic pre 64-bit time Linux ABI, e.g.

> +     csky, nios2  */

> +  if (vers == _STAT_VER_KERNEL)

>      {

> -#if STAT_IS_KERNEL_STAT

> -      return 0;

> +      int r = INLINE_SYSCALL_CALL (fstatat64, fd, file, st, flag);

> +      return r ?: stat_overflow (st);

> +    }

> +  return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);

>  #else

> -      return __xstat_conv (vers, &kst, st);

> +  /* Old kABIs with old non-LFS support, e.g. arm, i386, hppa, m68k,

> mips32,

> +     microblaze, s390, sh, powerpc32, and sparc32.  */

> +  struct stat64 st64;

> +  int r = INLINE_SYSCALL_CALL (fstatat64, fd, file, &st64, flag);

> +  return r ?: __xstat32_conv (vers, &st64, st);

>  #endif

> -    }

> -  return INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO

> (result)); }

>  libc_hidden_def (__fxstatat)

> -#if XSTAT_IS_XSTAT64

> -# undef __fxstatat64

> -strong_alias (__fxstatat, __fxstatat64);

> -libc_hidden_def (__fxstatat64)

> -#endif

> +

> +#endif /* XSTAT_IS_XSTAT64  */

> diff --git a/sysdeps/unix/sysv/linux/fxstatat64.c

> b/sysdeps/unix/sysv/linux/fxstatat64.c index e24b456604..ac33ab4fc9

> 100644 --- a/sysdeps/unix/sysv/linux/fxstatat64.c

> +++ b/sysdeps/unix/sysv/linux/fxstatat64.c

> @@ -1,4 +1,5 @@

> -/* Copyright (C) 2005-2020 Free Software Foundation, Inc.

> +/* fxstatat64 used on fstatat64, Linux implementation.

> +   Copyright (C) 2005-2020 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

> @@ -15,41 +16,53 @@

>     License along with the GNU C Library; if not, see

>     <https://www.gnu.org/licenses/>.  */

>  

> -#include <errno.h>

> -#include <fcntl.h>

> -#include <stddef.h>

> -#include <stdio.h>

> -#include <string.h>

> +#define __fxstatat __redirect___fxstatat

>  #include <sys/stat.h>

> +#undef __fxstatat

> +#include <fcntl.h>

>  #include <kernel_stat.h>

> -

>  #include <sysdep.h>

> -#include <sys/syscall.h>

> -

> +#include <xstatconv.h>

>  #include <statx_cp.h>

>  

> -/* Get information about the file NAME in BUF.  */

> +/* Get information about the file FD in BUF.  */

>  

>  int

>  __fxstatat64 (int vers, int fd, const char *file, struct stat64 *st,

> int flag) {

> -  if (__glibc_unlikely (vers != _STAT_VER_LINUX))

> -    return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);

> -

> -  int result;

> -

> -#ifdef __NR_fstatat64

> -  result = INTERNAL_SYSCALL_CALL (fstatat64, fd, file, st, flag);

> +#if XSTAT_IS_XSTAT64

> +# ifdef __NR_newfstatat

> +  /* 64-bit kABI, e.g. aarch64, ia64, powerpc64*, s390x, riscv64, and

> +     x86_64.  */

> +  if (vers == _STAT_VER_KERNEL || vers == _STAT_VER_LINUX)

> +    return INLINE_SYSCALL_CALL (newfstatat, fd, file, st, flag);

> +# elif defined __NR_fstatat64

> +  /* 64-bit kABI outlier, e.g. sparc64.  */

> +  struct stat64 st64;

> +  int r = INLINE_SYSCALL_CALL (fstatat64, fd, file, &st64, flag);

> +  return r ?: __xstat32_conv (vers, &st64, (struct stat *) st);

> +# else

> +  /* New 32-bit kABIs with only 64-bit time_t support, e.g. arc,

> riscv32.  */

> +  if (vers == _STAT_VER_KERNEL)

> +    {

> +      struct statx tmp;

> +      int r = INLINE_SYSCALL_CALL (statx, fd, file, AT_NO_AUTOMOUNT

> | flag,

> +				   STATX_BASIC_STATS, &tmp);

> +      if (r == 0)

> +	__cp_stat64_statx (st, &tmp);

> +      return r;

> +    }

> +# endif

>  #else

> -  struct statx tmp;

> -

> -  result = INTERNAL_SYSCALL_CALL (statx, fd, file, AT_NO_AUTOMOUNT |

> flag,

> -				  STATX_BASIC_STATS, &tmp);

> -  if (result == 0)

> -    __cp_stat64_statx (st, &tmp);

> +  /* All kABIs with non-LFS support, e.g. arm, csky, i386, hppa,

> m68k,

> +     microblaze, mips32, nios2, sh, powerpc32, and sparc32.  */

> +  if (vers == _STAT_VER_LINUX)

> +    return INLINE_SYSCALL_CALL (fstatat64, fd, file, st, flag);

>  #endif

> -  if (!__glibc_likely (INTERNAL_SYSCALL_ERROR_P (result)))

> -    return 0;

> -  return INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO

> (result));

> +  return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);

>  }

>  libc_hidden_def (__fxstatat64)

> +#if XSTAT_IS_XSTAT64 && IS_IN(libc)

> +strong_alias (__fxstatat64, __fxstatat);

> +hidden_ver (__fxstatat64, __fxstatat)

> +#endif

> diff --git a/sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat.c

> b/sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat.c deleted file

> mode 100644 index 8df65ebea0..0000000000

> --- a/sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat.c

> +++ /dev/null

> @@ -1,56 +0,0 @@

> -/* Copyright (C) 2011-2020 Free Software Foundation, Inc.

> -   This file is part of the GNU C Library.

> -   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.

> -

> -   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

> -   <https://www.gnu.org/licenses/>.  */

> -

> -#include <errno.h>

> -#include <fcntl.h>

> -#include <stddef.h>

> -#include <stdio.h>

> -#include <sys/stat.h>

> -#include <kernel_stat.h>

> -

> -#include <sysdep.h>

> -#include <sys/syscall.h>

> -

> -#if !XSTAT_IS_XSTAT64

> -#include "overflow.h"

> -#include <statx_cp.h>

> -

> -/* Get information about the file NAME in BUF.  */

> -int

> -__fxstatat (int vers, int fd, const char *file, struct stat *buf,

> int flag) -{

> -  if (vers == _STAT_VER_KERNEL)

> -    {

> -# ifdef __NR_fstatat64

> -      int rc = INLINE_SYSCALL (fstatat64, 4, fd, file, buf, flag);

> -# else

> -      struct statx tmp;

> -      int rc = INLINE_SYSCALL (statx, 5, fd, file,

> -                               AT_NO_AUTOMOUNT | flag,

> -                               STATX_BASIC_STATS, &tmp);

> -      if (rc == 0)

> -        __cp_stat64_statx ((struct stat64 *)buf, &tmp);

> -# endif

> -      return rc ?: stat_overflow (buf);

> -    }

> -

> -  errno = EINVAL;

> -  return -1;

> -}

> -libc_hidden_def (__fxstatat)

> -#endif

> diff --git a/sysdeps/unix/sysv/linux/hppa/fxstatat.c

> b/sysdeps/unix/sysv/linux/hppa/fxstatat.c deleted file mode 100644

> index 0f8b3135d8..0000000000

> --- a/sysdeps/unix/sysv/linux/hppa/fxstatat.c

> +++ /dev/null

> @@ -1 +0,0 @@

> -#include <sysdeps/unix/sysv/linux/i386/fxstatat.c>

> diff --git a/sysdeps/unix/sysv/linux/i386/fxstatat.c

> b/sysdeps/unix/sysv/linux/i386/fxstatat.c deleted file mode 100644

> index f720f6e429..0000000000

> --- a/sysdeps/unix/sysv/linux/i386/fxstatat.c

> +++ /dev/null

> @@ -1,54 +0,0 @@

> -/* Copyright (C) 2005-2020 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

> -   <https://www.gnu.org/licenses/>.  */

> -

> -/* Ho hum, if fxstatat == fxstatat64 we must get rid of the

> prototype or gcc

> -   will complain since they don't strictly match.  */

> -#define __fxstatat64 __fxstatat64_disable

> -

> -#include <errno.h>

> -#include <fcntl.h>

> -#include <stddef.h>

> -#include <stdio.h>

> -#include <string.h>

> -#include <sys/stat.h>

> -#include <kernel_stat.h>

> -

> -#include <sysdep.h>

> -#include <sys/syscall.h>

> -

> -#include <xstatconv.h>

> -

> -

> -/* Get information about the file NAME relative to FD in ST.  */

> -int

> -__fxstatat (int vers, int fd, const char *file, struct stat *st, int

> flag) -{

> -  int result;

> -  struct stat64 st64;

> -

> -  result = INTERNAL_SYSCALL_CALL (fstatat64, fd, file, &st64, flag);

> -  if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (result)))

> -    return INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO

> (result));

> -  else

> -    return __xstat32_conv (vers, &st64, st);

> -}

> -libc_hidden_def (__fxstatat)

> -#if XSTAT_IS_XSTAT64

> -# undef __fxstatat64

> -strong_alias (__fxstatat, __fxstatat64);

> -libc_hidden_ver (__fxstatat, __fxstatat64)

> -#endif

> diff --git a/sysdeps/unix/sysv/linux/m68k/fxstatat.c

> b/sysdeps/unix/sysv/linux/m68k/fxstatat.c deleted file mode 100644

> index 0f8b3135d8..0000000000

> --- a/sysdeps/unix/sysv/linux/m68k/fxstatat.c

> +++ /dev/null

> @@ -1 +0,0 @@

> -#include <sysdeps/unix/sysv/linux/i386/fxstatat.c>

> diff --git a/sysdeps/unix/sysv/linux/microblaze/fxstatat.c

> b/sysdeps/unix/sysv/linux/microblaze/fxstatat.c deleted file mode

> 100644 index 0f8b3135d8..0000000000

> --- a/sysdeps/unix/sysv/linux/microblaze/fxstatat.c

> +++ /dev/null

> @@ -1 +0,0 @@

> -#include <sysdeps/unix/sysv/linux/i386/fxstatat.c>

> diff --git a/sysdeps/unix/sysv/linux/mips/mips32/fxstatat.c

> b/sysdeps/unix/sysv/linux/mips/mips32/fxstatat.c deleted file mode

> 100644 index 0f8b3135d8..0000000000

> --- a/sysdeps/unix/sysv/linux/mips/mips32/fxstatat.c

> +++ /dev/null

> @@ -1 +0,0 @@

> -#include <sysdeps/unix/sysv/linux/i386/fxstatat.c>

> diff --git a/sysdeps/unix/sysv/linux/wordsize-64/fxstatat.c

> b/sysdeps/unix/sysv/linux/mips/mips64/fxstatat.c similarity index 56%

> rename from sysdeps/unix/sysv/linux/wordsize-64/fxstatat.c

> rename to sysdeps/unix/sysv/linux/mips/mips64/fxstatat.c

> index b8f5ab562e..58410a1441 100644

> --- a/sysdeps/unix/sysv/linux/wordsize-64/fxstatat.c

> +++ b/sysdeps/unix/sysv/linux/mips/mips64/fxstatat.c

> @@ -1,4 +1,5 @@

> -/* Copyright (C) 2005-2020 Free Software Foundation, Inc.

> +/* fxstat using old-style Unix fstat system call.

> +   Copyright (C) 1991-2020 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

> @@ -15,34 +16,18 @@

>     License along with the GNU C Library; if not, see

>     <https://www.gnu.org/licenses/>.  */

>  

> -/* Ho hum, since fxstatat == fxstatat64 we must get rid of the

> -   prototype or gcc will complain since they don't strictly match.

> */ -#define __fxstatat64 __fxstatat64_disable

> -

> -#include <errno.h>

> -#include <fcntl.h>

> -#include <stddef.h>

> -#include <stdio.h>

> -#include <string.h>

>  #include <sys/stat.h>

> -

> +#include <fcntl.h>

> +#include <kernel_stat.h>

>  #include <sysdep.h>

> -#include <sys/syscall.h>

> -

> +#include <xstatconv.h>

>  

> -/* Get information about the file NAME relative to FD in ST.  */

> +/* Get information about the file FD in BUF.  */

>  int

>  __fxstatat (int vers, int fd, const char *file, struct stat *st, int

> flag) {

> -  if (vers != _STAT_VER_KERNEL && vers != _STAT_VER_LINUX)

> -    {

> -      __set_errno (EINVAL);

> -      return -1;

> -    }

> -

> -  return INLINE_SYSCALL (newfstatat, 4, fd, file, st, flag);

> +  struct kernel_stat kst;

> +  int r = INLINE_SYSCALL_CALL (newfstatat, fd, file, &kst, flag);

> +  return r ?: __xstat_conv (vers, &kst, st);

>  }

>  libc_hidden_def (__fxstatat)

> -#undef __fxstatat64

> -strong_alias (__fxstatat, __fxstatat64);

> -strong_alias (__fxstatat64, __GI___fxstatat64)

> diff --git a/sysdeps/unix/sysv/linux/mips/mips64/fxstatat64.c

> b/sysdeps/unix/sysv/linux/mips/mips64/fxstatat64.c index

> 62df5fb26c..e5416d8971 100644 ---

> a/sysdeps/unix/sysv/linux/mips/mips64/fxstatat64.c +++

> b/sysdeps/unix/sysv/linux/mips/mips64/fxstatat64.c @@ -15,17 +15,9 @@

>     License along with the GNU C Library.  If not, see

>     <https://www.gnu.org/licenses/>.  */

>  

> -#include <errno.h>

> -#include <fcntl.h>

> -#include <stddef.h>

> -#include <stdio.h>

> -#include <string.h>

>  #include <sys/stat.h>

>  #include <kernel_stat.h>

> -

>  #include <sysdep.h>

> -#include <sys/syscall.h>

> -

>  #include <xstatconv.h>

>  

>  /* Get information about the file NAME in BUF.  */

> @@ -33,22 +25,12 @@

>  int

>  __fxstatat64 (int vers, int fd, const char *file, struct stat64 *st,

> int flag) {

> -  if (__builtin_expect (vers != _STAT_VER_LINUX, 0))

> -    {

> -      __set_errno (EINVAL);

> -      return -1;

> -    }

> -

> -  int result;

> -  struct kernel_stat kst;

> -

> -  result = INTERNAL_SYSCALL_CALL (newfstatat, fd, file, &kst, flag);

> -  if (!__glibc_likely (INTERNAL_SYSCALL_ERROR_P (result)))

> -    return __xstat64_conv (vers, &kst, st);

> -  else

> +  if (vers == _STAT_VER_LINUX)

>      {

> -      __set_errno (INTERNAL_SYSCALL_ERRNO (result));

> -      return -1;

> +      struct kernel_stat kst;

> +      int r = INLINE_SYSCALL_CALL (newfstatat, fd, file, &kst,

> flag);;

> +      return r ?: __xstat64_conv (vers, &kst, st);

>      }

> +  return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);

>  }

>  libc_hidden_def (__fxstatat64)

> diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fxstatat.c

> b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fxstatat.c deleted file

> mode 100644 index 0f8b3135d8..0000000000

> --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fxstatat.c

> +++ /dev/null

> @@ -1 +0,0 @@

> -#include <sysdeps/unix/sysv/linux/i386/fxstatat.c>

> diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/fxstatat.c

> b/sysdeps/unix/sysv/linux/s390/s390-32/fxstatat.c deleted file mode

> 100644 index 0f8b3135d8..0000000000

> --- a/sysdeps/unix/sysv/linux/s390/s390-32/fxstatat.c

> +++ /dev/null

> @@ -1 +0,0 @@

> -#include <sysdeps/unix/sysv/linux/i386/fxstatat.c>

> diff --git a/sysdeps/unix/sysv/linux/sh/fxstatat.c

> b/sysdeps/unix/sysv/linux/sh/fxstatat.c deleted file mode 100644

> index 0f8b3135d8..0000000000

> --- a/sysdeps/unix/sysv/linux/sh/fxstatat.c

> +++ /dev/null

> @@ -1 +0,0 @@

> -#include <sysdeps/unix/sysv/linux/i386/fxstatat.c>

> diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/fxstatat.c

> b/sysdeps/unix/sysv/linux/sparc/sparc32/fxstatat.c deleted file mode

> 100644 index 0f8b3135d8..0000000000

> --- a/sysdeps/unix/sysv/linux/sparc/sparc32/fxstatat.c

> +++ /dev/null

> @@ -1 +0,0 @@

> -#include <sysdeps/unix/sysv/linux/i386/fxstatat.c>

> diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/dl-fxstatat64.c

> b/sysdeps/unix/sysv/linux/sparc/sparc64/dl-fxstatat64.c deleted file

> mode 100644 index 330b33f7c7..0000000000

> --- a/sysdeps/unix/sysv/linux/sparc/sparc64/dl-fxstatat64.c

> +++ /dev/null

> @@ -1 +0,0 @@

> -#include "fxstatat.c"

> diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/fxstatat.c

> b/sysdeps/unix/sysv/linux/sparc/sparc64/fxstatat.c deleted file mode

> 100644 index db08af8e0f..0000000000

> --- a/sysdeps/unix/sysv/linux/sparc/sparc64/fxstatat.c

> +++ /dev/null

> @@ -1 +0,0 @@

> -#include "../../i386/fxstatat.c"

> diff --git a/sysdeps/unix/sysv/linux/wordsize-64/dl-fxstatat64.c

> b/sysdeps/unix/sysv/linux/wordsize-64/dl-fxstatat64.c deleted file

> mode 100644 index 330b33f7c7..0000000000

> --- a/sysdeps/unix/sysv/linux/wordsize-64/dl-fxstatat64.c

> +++ /dev/null

> @@ -1 +0,0 @@

> -#include "fxstatat.c"

> diff --git a/sysdeps/unix/sysv/linux/wordsize-64/fxstatat64.c

> b/sysdeps/unix/sysv/linux/wordsize-64/fxstatat64.c deleted file mode

> 100644 index 05e7f413bb..0000000000

> --- a/sysdeps/unix/sysv/linux/wordsize-64/fxstatat64.c

> +++ /dev/null

> @@ -1 +0,0 @@

> -/* fxstatat64 is in fxstatat.c */





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

Patch

diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index 9b2a253032..3c28adae0d 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -280,8 +280,7 @@  tests += tst-fallocate tst-fallocate64 tst-o_path-locks
 endif
 
 ifeq ($(subdir),elf)
-sysdep-rtld-routines += dl-brk dl-sbrk dl-getcwd dl-openat64 dl-opendir \
-			dl-fxstatat64
+sysdep-rtld-routines += dl-brk dl-sbrk dl-getcwd dl-openat64 dl-opendir
 
 libof-lddlibc4 = lddlibc4
 
diff --git a/sysdeps/unix/sysv/linux/alpha/dl-fxstatat64.c b/sysdeps/unix/sysv/linux/alpha/dl-fxstatat64.c
deleted file mode 100644
index 330b33f7c7..0000000000
--- a/sysdeps/unix/sysv/linux/alpha/dl-fxstatat64.c
+++ /dev/null
@@ -1 +0,0 @@ 
-#include "fxstatat.c"
diff --git a/sysdeps/unix/sysv/linux/alpha/fxstatat.c b/sysdeps/unix/sysv/linux/alpha/fxstatat.c
deleted file mode 100644
index c5953d250a..0000000000
--- a/sysdeps/unix/sysv/linux/alpha/fxstatat.c
+++ /dev/null
@@ -1,52 +0,0 @@ 
-/* Copyright (C) 2005-2020 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
-   <https://www.gnu.org/licenses/>.  */
-
-#define __fxstatat64 __fxstatat64_disable
-
-#include <errno.h>
-#include <fcntl.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <sys/stat.h>
-#include <kernel_stat.h>
-#include <sysdep.h>
-#include <sys/syscall.h>
-#include <xstatconv.h>
-
-#undef __fxstatat64
-
-/* Get information about the file NAME in BUF.  */
-int
-__fxstatat (int vers, int fd, const char *file, struct stat *st, int flag)
-{
-  int result, errno_out;
-
-  /* ??? The __fxstatat entry point is new enough that it must be using
-     vers == _STAT_VER_KERNEL64.  For the benefit of dl-fxstatat64.c, we
-     cannot actually check this, lest the compiler not optimize the rest
-     of the function away.  */
-
-  result = INTERNAL_SYSCALL_CALL (fstatat64, fd, file, st, flag);
-  if (__glibc_likely (!INTERNAL_SYSCALL_ERROR_P (result)))
-    return result;
-  errno_out = INTERNAL_SYSCALL_ERRNO (result);
-  __set_errno (errno_out);
-  return -1;
-}
-libc_hidden_def (__fxstatat)
-strong_alias (__fxstatat, __fxstatat64);
-libc_hidden_ver(__fxstatat, __fxstatat64);
diff --git a/sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat64.c b/sysdeps/unix/sysv/linux/alpha/fxstatat64.c
similarity index 53%
rename from sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat64.c
rename to sysdeps/unix/sysv/linux/alpha/fxstatat64.c
index 894f6dd396..f10c1d31e8 100644
--- a/sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat64.c
+++ b/sysdeps/unix/sysv/linux/alpha/fxstatat64.c
@@ -1,7 +1,6 @@ 
-/* __fxstatat64 () implementation.
-   Copyright (C) 2016-2020 Free Software Foundation, Inc.
+/* fxstat using old-style Unix stat system call.
+   Copyright (C) 2004-2020 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
@@ -17,21 +16,21 @@ 
    License along with the GNU C Library.  If not, see
    <https://www.gnu.org/licenses/>.  */
 
-/* Hide the prototype for __fxstatat so that GCC will not complain about
-   the different function signature if it is aliased to  __fxstatat64.
-   If XSTAT_IS_XSTAT64 is set to non-zero then the stat and stat64 structures
-   have an identical layout but different type names.  */
-
-#define __fxstatat __fxstatat_disable
-
+#define __fxstatat __redirect___fxstatat64
 #include <sys/stat.h>
-#undef _STAT_VER_LINUX
-#define _STAT_VER_LINUX _STAT_VER_KERNEL
-
-#include <sysdeps/unix/sysv/linux/fxstatat64.c>
-
 #undef __fxstatat
-#if XSTAT_IS_XSTAT64
-weak_alias (__fxstatat64, __fxstatat)
-libc_hidden_ver (__fxstatat64, __fxstatat)
+#include <kernel_stat.h>
+#include <sysdep.h>
+#include <xstatconv.h>
+
+/* Get information about the file NAME in BUF.  */
+int
+__fxstatat64 (int vers, int fd, const char *file, struct stat64 *st, int flag)
+{
+  return INLINE_SYSCALL_CALL (fstatat64, fd, file, st, flag);
+}
+libc_hidden_def (__fxstatat64)
+#if IS_IN(libc)
+strong_alias (__fxstatat64, __fxstatat);
+hidden_ver (__fxstatat64, __fxstatat)
 #endif
diff --git a/sysdeps/unix/sysv/linux/arm/fxstatat.c b/sysdeps/unix/sysv/linux/arm/fxstatat.c
deleted file mode 100644
index 0f8b3135d8..0000000000
--- a/sysdeps/unix/sysv/linux/arm/fxstatat.c
+++ /dev/null
@@ -1 +0,0 @@ 
-#include <sysdeps/unix/sysv/linux/i386/fxstatat.c>
diff --git a/sysdeps/unix/sysv/linux/fxstatat.c b/sysdeps/unix/sysv/linux/fxstatat.c
index 937fec45c2..0291a2c598 100644
--- a/sysdeps/unix/sysv/linux/fxstatat.c
+++ b/sysdeps/unix/sysv/linux/fxstatat.c
@@ -1,4 +1,5 @@ 
-/* Copyright (C) 2005-2020 Free Software Foundation, Inc.
+/* fxstatat used on fstatat, Linux implementation.
+   Copyright (C) 2005-2020 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
@@ -15,48 +16,36 @@ 
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-/* Ho hum, if fxstatat == fxstatat64 we must get rid of the prototype or gcc
-   will complain since they don't strictly match.  */
-#define __fxstatat64 __fxstatat64_disable
-
-#include <errno.h>
-#include <fcntl.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <string.h>
 #include <sys/stat.h>
+#include <fcntl.h>
 #include <kernel_stat.h>
-
 #include <sysdep.h>
-#include <sys/syscall.h>
 
-#include <xstatconv.h>
+#if !XSTAT_IS_XSTAT64
+# include <xstatconv.h>
+# include <xstatover.h>
 
-/* Get information about the file NAME in BUF.  */
+/* Get information about the file FD in BUF.  */
 int
 __fxstatat (int vers, int fd, const char *file, struct stat *st, int flag)
 {
-  int result;
 #if STAT_IS_KERNEL_STAT
-# define kst (*st)
-#else
-  struct kernel_stat kst;
-#endif
-
-  result = INTERNAL_SYSCALL_CALL (newfstatat, fd, file, &kst, flag);
-  if (!__glibc_likely (INTERNAL_SYSCALL_ERROR_P (result)))
+  /* New kABIs which uses generic pre 64-bit time Linux ABI, e.g.
+     csky, nios2  */
+  if (vers == _STAT_VER_KERNEL)
     {
-#if STAT_IS_KERNEL_STAT
-      return 0;
+      int r = INLINE_SYSCALL_CALL (fstatat64, fd, file, st, flag);
+      return r ?: stat_overflow (st);
+    }
+  return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
 #else
-      return __xstat_conv (vers, &kst, st);
+  /* Old kABIs with old non-LFS support, e.g. arm, i386, hppa, m68k, mips32,
+     microblaze, s390, sh, powerpc32, and sparc32.  */
+  struct stat64 st64;
+  int r = INLINE_SYSCALL_CALL (fstatat64, fd, file, &st64, flag);
+  return r ?: __xstat32_conv (vers, &st64, st);
 #endif
-    }
-  return INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO (result));
 }
 libc_hidden_def (__fxstatat)
-#if XSTAT_IS_XSTAT64
-# undef __fxstatat64
-strong_alias (__fxstatat, __fxstatat64);
-libc_hidden_def (__fxstatat64)
-#endif
+
+#endif /* XSTAT_IS_XSTAT64  */
diff --git a/sysdeps/unix/sysv/linux/fxstatat64.c b/sysdeps/unix/sysv/linux/fxstatat64.c
index e24b456604..ac33ab4fc9 100644
--- a/sysdeps/unix/sysv/linux/fxstatat64.c
+++ b/sysdeps/unix/sysv/linux/fxstatat64.c
@@ -1,4 +1,5 @@ 
-/* Copyright (C) 2005-2020 Free Software Foundation, Inc.
+/* fxstatat64 used on fstatat64, Linux implementation.
+   Copyright (C) 2005-2020 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
@@ -15,41 +16,53 @@ 
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#include <errno.h>
-#include <fcntl.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <string.h>
+#define __fxstatat __redirect___fxstatat
 #include <sys/stat.h>
+#undef __fxstatat
+#include <fcntl.h>
 #include <kernel_stat.h>
-
 #include <sysdep.h>
-#include <sys/syscall.h>
-
+#include <xstatconv.h>
 #include <statx_cp.h>
 
-/* Get information about the file NAME in BUF.  */
+/* Get information about the file FD in BUF.  */
 
 int
 __fxstatat64 (int vers, int fd, const char *file, struct stat64 *st, int flag)
 {
-  if (__glibc_unlikely (vers != _STAT_VER_LINUX))
-    return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
-
-  int result;
-
-#ifdef __NR_fstatat64
-  result = INTERNAL_SYSCALL_CALL (fstatat64, fd, file, st, flag);
+#if XSTAT_IS_XSTAT64
+# ifdef __NR_newfstatat
+  /* 64-bit kABI, e.g. aarch64, ia64, powerpc64*, s390x, riscv64, and
+     x86_64.  */
+  if (vers == _STAT_VER_KERNEL || vers == _STAT_VER_LINUX)
+    return INLINE_SYSCALL_CALL (newfstatat, fd, file, st, flag);
+# elif defined __NR_fstatat64
+  /* 64-bit kABI outlier, e.g. sparc64.  */
+  struct stat64 st64;
+  int r = INLINE_SYSCALL_CALL (fstatat64, fd, file, &st64, flag);
+  return r ?: __xstat32_conv (vers, &st64, (struct stat *) st);
+# else
+  /* New 32-bit kABIs with only 64-bit time_t support, e.g. arc, riscv32.  */
+  if (vers == _STAT_VER_KERNEL)
+    {
+      struct statx tmp;
+      int r = INLINE_SYSCALL_CALL (statx, fd, file, AT_NO_AUTOMOUNT | flag,
+				   STATX_BASIC_STATS, &tmp);
+      if (r == 0)
+	__cp_stat64_statx (st, &tmp);
+      return r;
+    }
+# endif
 #else
-  struct statx tmp;
-
-  result = INTERNAL_SYSCALL_CALL (statx, fd, file, AT_NO_AUTOMOUNT | flag,
-				  STATX_BASIC_STATS, &tmp);
-  if (result == 0)
-    __cp_stat64_statx (st, &tmp);
+  /* All kABIs with non-LFS support, e.g. arm, csky, i386, hppa, m68k,
+     microblaze, mips32, nios2, sh, powerpc32, and sparc32.  */
+  if (vers == _STAT_VER_LINUX)
+    return INLINE_SYSCALL_CALL (fstatat64, fd, file, st, flag);
 #endif
-  if (!__glibc_likely (INTERNAL_SYSCALL_ERROR_P (result)))
-    return 0;
-  return INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO (result));
+  return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
 }
 libc_hidden_def (__fxstatat64)
+#if XSTAT_IS_XSTAT64 && IS_IN(libc)
+strong_alias (__fxstatat64, __fxstatat);
+hidden_ver (__fxstatat64, __fxstatat)
+#endif
diff --git a/sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat.c b/sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat.c
deleted file mode 100644
index 8df65ebea0..0000000000
--- a/sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat.c
+++ /dev/null
@@ -1,56 +0,0 @@ 
-/* Copyright (C) 2011-2020 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
-
-   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
-   <https://www.gnu.org/licenses/>.  */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <sys/stat.h>
-#include <kernel_stat.h>
-
-#include <sysdep.h>
-#include <sys/syscall.h>
-
-#if !XSTAT_IS_XSTAT64
-#include "overflow.h"
-#include <statx_cp.h>
-
-/* Get information about the file NAME in BUF.  */
-int
-__fxstatat (int vers, int fd, const char *file, struct stat *buf, int flag)
-{
-  if (vers == _STAT_VER_KERNEL)
-    {
-# ifdef __NR_fstatat64
-      int rc = INLINE_SYSCALL (fstatat64, 4, fd, file, buf, flag);
-# else
-      struct statx tmp;
-      int rc = INLINE_SYSCALL (statx, 5, fd, file,
-                               AT_NO_AUTOMOUNT | flag,
-                               STATX_BASIC_STATS, &tmp);
-      if (rc == 0)
-        __cp_stat64_statx ((struct stat64 *)buf, &tmp);
-# endif
-      return rc ?: stat_overflow (buf);
-    }
-
-  errno = EINVAL;
-  return -1;
-}
-libc_hidden_def (__fxstatat)
-#endif
diff --git a/sysdeps/unix/sysv/linux/hppa/fxstatat.c b/sysdeps/unix/sysv/linux/hppa/fxstatat.c
deleted file mode 100644
index 0f8b3135d8..0000000000
--- a/sysdeps/unix/sysv/linux/hppa/fxstatat.c
+++ /dev/null
@@ -1 +0,0 @@ 
-#include <sysdeps/unix/sysv/linux/i386/fxstatat.c>
diff --git a/sysdeps/unix/sysv/linux/i386/fxstatat.c b/sysdeps/unix/sysv/linux/i386/fxstatat.c
deleted file mode 100644
index f720f6e429..0000000000
--- a/sysdeps/unix/sysv/linux/i386/fxstatat.c
+++ /dev/null
@@ -1,54 +0,0 @@ 
-/* Copyright (C) 2005-2020 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
-   <https://www.gnu.org/licenses/>.  */
-
-/* Ho hum, if fxstatat == fxstatat64 we must get rid of the prototype or gcc
-   will complain since they don't strictly match.  */
-#define __fxstatat64 __fxstatat64_disable
-
-#include <errno.h>
-#include <fcntl.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <kernel_stat.h>
-
-#include <sysdep.h>
-#include <sys/syscall.h>
-
-#include <xstatconv.h>
-
-
-/* Get information about the file NAME relative to FD in ST.  */
-int
-__fxstatat (int vers, int fd, const char *file, struct stat *st, int flag)
-{
-  int result;
-  struct stat64 st64;
-
-  result = INTERNAL_SYSCALL_CALL (fstatat64, fd, file, &st64, flag);
-  if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (result)))
-    return INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO (result));
-  else
-    return __xstat32_conv (vers, &st64, st);
-}
-libc_hidden_def (__fxstatat)
-#if XSTAT_IS_XSTAT64
-# undef __fxstatat64
-strong_alias (__fxstatat, __fxstatat64);
-libc_hidden_ver (__fxstatat, __fxstatat64)
-#endif
diff --git a/sysdeps/unix/sysv/linux/m68k/fxstatat.c b/sysdeps/unix/sysv/linux/m68k/fxstatat.c
deleted file mode 100644
index 0f8b3135d8..0000000000
--- a/sysdeps/unix/sysv/linux/m68k/fxstatat.c
+++ /dev/null
@@ -1 +0,0 @@ 
-#include <sysdeps/unix/sysv/linux/i386/fxstatat.c>
diff --git a/sysdeps/unix/sysv/linux/microblaze/fxstatat.c b/sysdeps/unix/sysv/linux/microblaze/fxstatat.c
deleted file mode 100644
index 0f8b3135d8..0000000000
--- a/sysdeps/unix/sysv/linux/microblaze/fxstatat.c
+++ /dev/null
@@ -1 +0,0 @@ 
-#include <sysdeps/unix/sysv/linux/i386/fxstatat.c>
diff --git a/sysdeps/unix/sysv/linux/mips/mips32/fxstatat.c b/sysdeps/unix/sysv/linux/mips/mips32/fxstatat.c
deleted file mode 100644
index 0f8b3135d8..0000000000
--- a/sysdeps/unix/sysv/linux/mips/mips32/fxstatat.c
+++ /dev/null
@@ -1 +0,0 @@ 
-#include <sysdeps/unix/sysv/linux/i386/fxstatat.c>
diff --git a/sysdeps/unix/sysv/linux/wordsize-64/fxstatat.c b/sysdeps/unix/sysv/linux/mips/mips64/fxstatat.c
similarity index 56%
rename from sysdeps/unix/sysv/linux/wordsize-64/fxstatat.c
rename to sysdeps/unix/sysv/linux/mips/mips64/fxstatat.c
index b8f5ab562e..58410a1441 100644
--- a/sysdeps/unix/sysv/linux/wordsize-64/fxstatat.c
+++ b/sysdeps/unix/sysv/linux/mips/mips64/fxstatat.c
@@ -1,4 +1,5 @@ 
-/* Copyright (C) 2005-2020 Free Software Foundation, Inc.
+/* fxstat using old-style Unix fstat system call.
+   Copyright (C) 1991-2020 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
@@ -15,34 +16,18 @@ 
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-/* Ho hum, since fxstatat == fxstatat64 we must get rid of the
-   prototype or gcc will complain since they don't strictly match.  */
-#define __fxstatat64 __fxstatat64_disable
-
-#include <errno.h>
-#include <fcntl.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <string.h>
 #include <sys/stat.h>
-
+#include <fcntl.h>
+#include <kernel_stat.h>
 #include <sysdep.h>
-#include <sys/syscall.h>
-
+#include <xstatconv.h>
 
-/* Get information about the file NAME relative to FD in ST.  */
+/* Get information about the file FD in BUF.  */
 int
 __fxstatat (int vers, int fd, const char *file, struct stat *st, int flag)
 {
-  if (vers != _STAT_VER_KERNEL && vers != _STAT_VER_LINUX)
-    {
-      __set_errno (EINVAL);
-      return -1;
-    }
-
-  return INLINE_SYSCALL (newfstatat, 4, fd, file, st, flag);
+  struct kernel_stat kst;
+  int r = INLINE_SYSCALL_CALL (newfstatat, fd, file, &kst, flag);
+  return r ?: __xstat_conv (vers, &kst, st);
 }
 libc_hidden_def (__fxstatat)
-#undef __fxstatat64
-strong_alias (__fxstatat, __fxstatat64);
-strong_alias (__fxstatat64, __GI___fxstatat64)
diff --git a/sysdeps/unix/sysv/linux/mips/mips64/fxstatat64.c b/sysdeps/unix/sysv/linux/mips/mips64/fxstatat64.c
index 62df5fb26c..e5416d8971 100644
--- a/sysdeps/unix/sysv/linux/mips/mips64/fxstatat64.c
+++ b/sysdeps/unix/sysv/linux/mips/mips64/fxstatat64.c
@@ -15,17 +15,9 @@ 
    License along with the GNU C Library.  If not, see
    <https://www.gnu.org/licenses/>.  */
 
-#include <errno.h>
-#include <fcntl.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <string.h>
 #include <sys/stat.h>
 #include <kernel_stat.h>
-
 #include <sysdep.h>
-#include <sys/syscall.h>
-
 #include <xstatconv.h>
 
 /* Get information about the file NAME in BUF.  */
@@ -33,22 +25,12 @@ 
 int
 __fxstatat64 (int vers, int fd, const char *file, struct stat64 *st, int flag)
 {
-  if (__builtin_expect (vers != _STAT_VER_LINUX, 0))
-    {
-      __set_errno (EINVAL);
-      return -1;
-    }
-
-  int result;
-  struct kernel_stat kst;
-
-  result = INTERNAL_SYSCALL_CALL (newfstatat, fd, file, &kst, flag);
-  if (!__glibc_likely (INTERNAL_SYSCALL_ERROR_P (result)))
-    return __xstat64_conv (vers, &kst, st);
-  else
+  if (vers == _STAT_VER_LINUX)
     {
-      __set_errno (INTERNAL_SYSCALL_ERRNO (result));
-      return -1;
+      struct kernel_stat kst;
+      int r = INLINE_SYSCALL_CALL (newfstatat, fd, file, &kst, flag);;
+      return r ?: __xstat64_conv (vers, &kst, st);
     }
+  return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
 }
 libc_hidden_def (__fxstatat64)
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fxstatat.c b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fxstatat.c
deleted file mode 100644
index 0f8b3135d8..0000000000
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fxstatat.c
+++ /dev/null
@@ -1 +0,0 @@ 
-#include <sysdeps/unix/sysv/linux/i386/fxstatat.c>
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/fxstatat.c b/sysdeps/unix/sysv/linux/s390/s390-32/fxstatat.c
deleted file mode 100644
index 0f8b3135d8..0000000000
--- a/sysdeps/unix/sysv/linux/s390/s390-32/fxstatat.c
+++ /dev/null
@@ -1 +0,0 @@ 
-#include <sysdeps/unix/sysv/linux/i386/fxstatat.c>
diff --git a/sysdeps/unix/sysv/linux/sh/fxstatat.c b/sysdeps/unix/sysv/linux/sh/fxstatat.c
deleted file mode 100644
index 0f8b3135d8..0000000000
--- a/sysdeps/unix/sysv/linux/sh/fxstatat.c
+++ /dev/null
@@ -1 +0,0 @@ 
-#include <sysdeps/unix/sysv/linux/i386/fxstatat.c>
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/fxstatat.c b/sysdeps/unix/sysv/linux/sparc/sparc32/fxstatat.c
deleted file mode 100644
index 0f8b3135d8..0000000000
--- a/sysdeps/unix/sysv/linux/sparc/sparc32/fxstatat.c
+++ /dev/null
@@ -1 +0,0 @@ 
-#include <sysdeps/unix/sysv/linux/i386/fxstatat.c>
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/dl-fxstatat64.c b/sysdeps/unix/sysv/linux/sparc/sparc64/dl-fxstatat64.c
deleted file mode 100644
index 330b33f7c7..0000000000
--- a/sysdeps/unix/sysv/linux/sparc/sparc64/dl-fxstatat64.c
+++ /dev/null
@@ -1 +0,0 @@ 
-#include "fxstatat.c"
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/fxstatat.c b/sysdeps/unix/sysv/linux/sparc/sparc64/fxstatat.c
deleted file mode 100644
index db08af8e0f..0000000000
--- a/sysdeps/unix/sysv/linux/sparc/sparc64/fxstatat.c
+++ /dev/null
@@ -1 +0,0 @@ 
-#include "../../i386/fxstatat.c"
diff --git a/sysdeps/unix/sysv/linux/wordsize-64/dl-fxstatat64.c b/sysdeps/unix/sysv/linux/wordsize-64/dl-fxstatat64.c
deleted file mode 100644
index 330b33f7c7..0000000000
--- a/sysdeps/unix/sysv/linux/wordsize-64/dl-fxstatat64.c
+++ /dev/null
@@ -1 +0,0 @@ 
-#include "fxstatat.c"
diff --git a/sysdeps/unix/sysv/linux/wordsize-64/fxstatat64.c b/sysdeps/unix/sysv/linux/wordsize-64/fxstatat64.c
deleted file mode 100644
index 05e7f413bb..0000000000
--- a/sysdeps/unix/sysv/linux/wordsize-64/fxstatat64.c
+++ /dev/null
@@ -1 +0,0 @@ 
-/* fxstatat64 is in fxstatat.c */