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4e77815173
This patch consolidates all the preadv{64} implementation for Linux
in only one (sysdeps/unix/sysv/linux/preadv{64}.c). It also removes the
syscall from the auto-generation using assembly macros.
It was based on previous pread/pread64 consolidation patch. The new macro
SYSCALL_LL{64} is used to handle the offset argument and alias is created
for __ASSUME_OFF_DIFF_OFF64 in case of pread64.
Checked on x86_64, i386, aarch64, and powerpc64le.
* misc/Makefile (CFLAGS-preadv.c): New variable: add cancellation
required flags.
(CFLAGS-preadv64.c): Likewise.
* sysdeps/unix/sysv/linux/generic/wordsize-32/preadv.c: Remove file.
* sysdeps/unix/sysv/linux/generic/wordsize-32/preadv64.c: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n64/preadv64.c: Likewise.
* sysdeps/unix/sysv/linux/wordsize-64/preadv.c: Likewise.
* sysdeps/unix/sysv/linux/wordsize-64/preadv64.: Likwise.
* sysdeps/unix/sysv/linux/x86_64/x32/syscalls.list (preadv): Remove
syscall from auto-generation.
* sysdeps/unix/sysv/linux/preadv.c: Rewrite implementation.
[WORDSIZE == 64] (preadv64): Remove macro.
[!PREADV] (PREADV): Likewise.
[!PREADV] (PREADV_REPLACEMENT): Likewise.
[!PREADV] (PREAD): Likewise.
[!PREADV] (OFF_T): Likewise.
[!__ASSUME_PREADV] (PREADV_REPLACEMENT): Likewise.
(LO_HI_LONG): Remove macro.
[__WORDSIZE != 64 || __ASSUME_OFF_DIFF_OFF64] (preadv): Add function.
* sysdeps/unix/sysv/linux/preadv64.c: Rewrite implementation.
(PREADV): Remove macro.
(PREADV_REPLACEMENTE): Likewise.
(PREAD): Likewise.
(OFF_T): Likewise.
(preadv64): New function.
* nptl/tst-cancel4.c (tf_preadv): Add test.
56 lines
1.8 KiB
C
56 lines
1.8 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,
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__ALIGNMENT_ARG SYSCALL_LL64 (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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__ALIGNMENT_ARG SYSCALL_LL64 (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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#if __WORDSIZE == 64 && !defined (__ASSUME_OFF_DIFF_OFF64)
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strong_alias (preadv64, preadv)
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#endif
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