mirror of
https://sourceware.org/git/glibc.git
synced 2025-04-24 21:47:24 +03:00
6073bae64c
It implements all the required syscall for the all Linux kABIS on
fstatat{64} instead of calling fxstatat{64}.
On non-LFS implementation, it handles 3 cases:
1. New kABIs which uses generic pre 64-bit time Linux ABI (csky and
nios): it issues __NR_fstat64 plus handle the overflow on st_ino,
st_size, or st_blocks.
2. Old KABIs with old non-LFS support (arm, i386, hppa, m68k,
microblaze, mips32, s390, sh, powerpc, and sparc32): it issues
__NR_fstatat64 and convert the result to struct stat.
3. 64-bit kABI outliers (mips64 and mips64-n32): it issues
__NR_newfstatat and convert the result to struct stat.
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.
1.2. 64-bit kABI outlier (alpha): it issues __NR_fstatat64.
1.3. 64-bit kABI outlier where struct stat64 does not match kernel
one (sparc64): it issues __NR_fstatat64 and convert the result
to struct stat64.
1.4. 32-bit kABI with default 64-bit time_t (arc, riscv32): it
issues __NR_statx and convert the result to struct stat64.
2. Old ABIs with XSTAT_IS_XSTAT64 being 0:
2.1. All kABIs with non-LFS support (arm, csky, i386, hppa, m68k,
microblaze, nios2, sh, powerpc32, and sparc32): it issues
__NR_fstatat64.
2.2. 64-bit kABI outliers (mips64 and mips64-n32): it issues
__NR_newfstatat and convert the result to struct stat64.
It allows to remove all the hidden definitions from the {f,l}xstat{64}
(some are still kept because Hurd requires it).
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>
80 lines
2.6 KiB
C
80 lines
2.6 KiB
C
/* Get file status. Linux 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#define __fstatat __redirect___fstatat
|
|
#define fstatat __redirect_fstatat
|
|
#include <sys/stat.h>
|
|
#undef __fstatat
|
|
#undef fstatat
|
|
#include <fcntl.h>
|
|
|
|
#include <kernel_stat.h>
|
|
#include <sysdep.h>
|
|
|
|
#include <statx_cp.h>
|
|
#include <kstat_cp.h>
|
|
|
|
int
|
|
__fstatat64 (int fd, const char *file, struct stat64 *buf, int flag)
|
|
{
|
|
#if XSTAT_IS_XSTAT64
|
|
# ifdef __NR_newfstatat
|
|
/* 64-bit kABI, e.g. aarch64, ia64, powerpc64*, s390x, riscv64, and
|
|
x86_64. */
|
|
return INLINE_SYSCALL_CALL (newfstatat, fd, file, buf, flag);
|
|
# elif defined __NR_fstatat64
|
|
# if STAT64_IS_KERNEL_STAT64
|
|
/* 64-bit kABI outlier, e.g. alpha. */
|
|
return INLINE_SYSCALL_CALL (fstatat64, fd, file, buf, flag);
|
|
# else
|
|
/* 64-bit kABI outlier, e.g. sparc64. */
|
|
struct kernel_stat64 kst64;
|
|
int r = INLINE_SYSCALL_CALL (fstatat64, fd, file, &kst64, flag);
|
|
return r ?: __cp_stat64_kstat64 (buf, &kst64);
|
|
# endif
|
|
# else
|
|
/* 32-bit kABI with default 64-bit time_t, e.g. arc, riscv32. */
|
|
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 (buf, &tmp);
|
|
return r;
|
|
# endif
|
|
#else
|
|
# ifdef __NR_fstatat64
|
|
/* All kABIs with non-LFS support, e.g. arm, csky, i386, hppa, m68k,
|
|
microblaze, nios2, sh, powerpc32, and sparc32. */
|
|
return INLINE_SYSCALL_CALL (fstatat64, fd, file, buf, flag);
|
|
# else
|
|
/* 64-bit kabi outlier, e.g. mips64 and mips64-n32. */
|
|
struct kernel_stat kst;
|
|
int r = INLINE_SYSCALL_CALL (newfstatat, fd, file, &kst, flag);
|
|
return r ?: __cp_kstat_stat64 (&kst, buf);
|
|
# endif
|
|
#endif
|
|
}
|
|
hidden_def (__fstatat64)
|
|
weak_alias (__fstatat64, fstatat64)
|
|
|
|
#if XSTAT_IS_XSTAT64
|
|
strong_alias (__fstatat64, __fstatat)
|
|
weak_alias (__fstatat64, fstatat)
|
|
strong_alias (__fstatat64, __GI___fstatat);
|
|
#endif
|