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6320de9536
This patch removes the __ASSUME_OFF_DIFF_OFF64 define introduced in
p{read,write} consolidation patch. This define was added based on
the idea 32 bits ports would continue to follow previous off{64}_t
definition where off_t size differs from off64_t one.
However, with recent AArch64/ILP32 patch submission and also with
discussion for RISCV kernel interface, 32 bits ports now may aim
to use off_t and off64_t with the same size as 64 bits.
So current assumption for both p{read,write} and p{read,write}v
are not compatible with new type definition. This patch now makes
the syscall wrappers to only depend on __OFF_T_MATCHES_OFF64_T to
define the default and 64-suffix variant, as follow:
<function>.c
#ifndef __OFF_T_MATCHES_OFF64_T
/* build <function> */
#endif
and
<function>64.c
/* build <function>64 */
#ifdef __OFF_T_MATCHES_OFF64_T
weak_alias (fallocate64, fallocate)
#endif
Tested on x86_64, i686, x32, and armhf.
* sysdeps/unix/sysv/linux/mips/kernel-features.h
(__ASSUME_OFF_DIFF_OFF64): Remove define.
* sysdeps/unix/sysv/linux/pread.c
[__WORDSIZE != 64 || __ASSUME_OFF_DIFF_OFF64] (pread): Replace by
__OFF_T_MATCHES_OFF64_T.
* sysdeps/unix/sysv/linux/pread64.c
[__WORDSIZE != 64 || __ASSUME_OFF_DIFF_OFF64] (pread64): Likewise.
* sysdeps/unix/sysv/linux/preadv.c
[__WORDSIZE != 64 || __ASSUME_OFF_DIFF_OFF64] (preadv): Likewise.
* sysdeps/unix/sysv/linux/preadv64.c
[__WORDSIZE != 64 || __ASSUME_OFF_DIFF_OFF64] (preadv64): Likewise.
* sysdeps/unix/sysv/linux/pwrite.c
[__WORDSIZE != 64 || __ASSUME_OFF_DIFF_OFF64] (pwrite): Likewise.
* sysdeps/unix/sysv/linux/pwrite64.c
[__WORDSIZE != 64 || __ASSUME_OFF_DIFF_OFF64] (pwrite64): Likewise.
* sysdeps/unix/sysv/linux/pwritev.c
[__WORDSIZE != 64 || __ASSUME_OFF_DIFF_OFF64] (pwritev): Likewise.
* sysdeps/unix/sysv/linux/pwritev64.c
[__WORDSIZE != 64 || __ASSUME_OFF_DIFF_OFF64] (pwritev64): Likewise.
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/* Copyright (C) 2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sys/uio.h>
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#include <sysdep-cancel.h>
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#ifdef __ASSUME_PREADV
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# ifndef __NR_preadv64
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# define __NR_preadv64 __NR_preadv
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# endif
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ssize_t
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preadv64 (int fd, const struct iovec *vector, int count, off64_t offset)
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{
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return SYSCALL_CANCEL (preadv64, fd, vector, count, LO_HI_LONG (offset));
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}
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#else
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static ssize_t __atomic_preadv64_replacement (int, const struct iovec *,
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int, off64_t) internal_function;
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ssize_t
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preadv64 (int fd, const struct iovec *vector, int count, off64_t offset)
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{
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#ifdef __NR_preadv64
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ssize_t result = SYSCALL_CANCEL (preadv64, fd, vector, count,
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LO_HI_LONG (offset));
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if (result >= 0 || errno != ENOSYS)
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return result;
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#endif
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return __atomic_preadv64_replacement (fd, vector, count, offset);
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}
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# define PREADV static internal_function __atomic_preadv64_replacement
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# define PREAD __pread64
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# define OFF_T off64_t
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# include <sysdeps/posix/preadv.c>
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#endif
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#ifdef __OFF_T_MATCHES_OFF64_T
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strong_alias (preadv64, preadv)
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#endif
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