mirror of https://gitee.com/Nocallback/glibc.git
Browse Source
This patch consolidates all the pwritev{64} implementation for Linux
in only one (sysdeps/unix/sysv/linux/pwritev{64}.c). It also removes the
syscall from the auto-generation using assembly macros.
It was based on previous pwrite/pwrite64 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-pwritev.c): New variable: add cancellation
required flags.
(CFLAGS-pwritev64.c): Likewise.
* sysdeps/unix/sysv/linux/generic/wordsize-32/pwritev.c: Remove file.
* sysdeps/unix/sysv/linux/generic/wordsize-32/pwritev64.c: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n64/pwritev64.c: Likewise.
* sysdeps/unix/sysv/linux/wordsize-64/pwritev.c: Likewise.
* sysdeps/unix/sysv/linux/wordsize-64/pwritev64.: Likwise.
* sysdeps/unix/sysv/linux/x86_64/x32/syscalls.list (pwritev): Remove
syscall from auto-generation.
* sysdeps/unix/sysv/linux/pwritev.c: Rewrite implementation.
[WORDSIZE == 64] (pwritev64): Remove macro.
[!PWRITEV] (PWRITEV): Likewise.
[!PWRITEV] (PWRITEV_REPLACEMENT): Likewise.
[!PWRITEV] (PWRITE): Likewise.
[!PWRITEV] (OFF_T): Likewise.
[!__ASSUME_PWRITEV] (PWRITEV_REPLACEMENT): Likewise.
(LO_HI_LONG): Remove macro.
[__WORDSIZE != 64 || __ASSUME_OFF_DIFF_OFF64] (pwritev): Add function.
* sysdeps/unix/sysv/linux/pwritev64.c: Rewrite implementation.
(PWRITEV): Remove macro.
(PWRITEV_REPLACEMENTE): Likewise.
(PWRITE): Likewise.
(OFF_T): Likewise.
(pwritev64): New function.
* nptl/tst-cancel4.c (tf_writev): Add test.
hjl/pr20309/master
Adhemerval Zanella
10 years ago
11 changed files with 155 additions and 199 deletions
@ -1,37 +0,0 @@ |
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/* Copyright (C) 2011-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library. |
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Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. |
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Based on work contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. |
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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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|
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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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|
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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 <assert.h> |
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#include <errno.h> |
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#include <endian.h> |
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#include <unistd.h> |
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#include <sys/uio.h> |
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#include <sysdep-cancel.h> |
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#include <sys/syscall.h> |
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ssize_t |
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__libc_pwritev (int fd, const struct iovec *vector, int count, off_t offset) |
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{ |
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assert (sizeof (offset) == 4); |
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return SYSCALL_CANCEL (pwritev, fd, vector, count, __ALIGNMENT_ARG |
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__LONG_LONG_PAIR (offset >> 31, offset)); |
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} |
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strong_alias (__libc_pwritev, __pwritev) |
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weak_alias (__libc_pwritev, pwritev) |
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@ -1,38 +0,0 @@ |
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/* Copyright (C) 2011-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library. |
|
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Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. |
|
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Based on work contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. |
|
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|
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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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|
|
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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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|
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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 <errno.h> |
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#include <endian.h> |
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#include <unistd.h> |
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#include <sys/uio.h> |
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#include <sysdep-cancel.h> |
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#include <sys/syscall.h> |
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ssize_t |
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__libc_pwritev64 (int fd, const struct iovec *vector, int count, |
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off64_t offset) |
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{ |
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return SYSCALL_CANCEL (pwritev, fd, |
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vector, count, __ALIGNMENT_ARG |
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__LONG_LONG_PAIR ((off_t) (offset >> 32), |
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(off_t) (offset & 0xffffffff))); |
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} |
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strong_alias (__libc_pwritev64, pwritev64) |
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weak_alias (__libc_pwritev64, __pwritev64) |
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@ -1 +0,0 @@ |
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/* Empty since the pwritev syscall is equivalent. */ |
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@ -1,6 +1,55 @@ |
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#define PWRITEV pwritev64 |
/* Copyright (C) 2016 Free Software Foundation, Inc.
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#define PWRITEV_REPLACEMENT __atomic_pwritev64_replacement |
This file is part of the GNU C Library. |
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#define PWRITE __pwrite64 |
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#define OFF_T off64_t |
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#include "pwritev.c" |
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_PWRITEV |
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# ifndef __NR_pwritev64 |
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# define __NR_pwritev64 __NR_pwritev |
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# endif |
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ssize_t |
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pwritev64 (int fd, const struct iovec *vector, int count, off64_t offset) |
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{ |
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return SYSCALL_CANCEL (pwritev64, 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_pwritev64_replacement (int, const struct iovec *, |
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int, off64_t) internal_function; |
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ssize_t |
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pwritev64 (int fd, const struct iovec *vector, int count, off64_t offset) |
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{ |
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#ifdef __NR_pwrite64v |
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ssize_t result = SYSCALL_CANCEL (pwritev64, 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_pwritev64_replacement (fd, vector, count, offset); |
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} |
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# define PWRITEV static internal_function __atomic_pwritev64_replacement |
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# define PWRITE __pwrite64 |
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# define OFF_T off64_t |
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# include <sysdeps/posix/pwritev.c> |
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#endif |
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#if __WORDSIZE == 64 && !defined (__ASSUME_OFF_DIFF_OFF64) |
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strong_alias (pwritev64, pwritev) |
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#endif |
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@ -1,64 +0,0 @@ |
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/* 64-bit pwritev.
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Copyright (C) 2012-2016 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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|
|
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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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|
|
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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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|
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#include <errno.h> |
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#include <stddef.h> |
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#include <sys/param.h> |
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/* Hide the pwritev64 declaration. */ |
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#define pwritev64 __redirect_pwritev64 |
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#include <sys/uio.h> |
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#include <sysdep-cancel.h> |
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#include <sys/syscall.h> |
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#include <kernel-features.h> |
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#ifndef __ASSUME_PWRITEV |
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static ssize_t __atomic_pwritev_replacement (int, const struct iovec *, |
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int, off_t) internal_function; |
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#endif |
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ssize_t |
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pwritev (int fd, const struct iovec *vector, int count, off_t offset) |
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{ |
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#ifdef __NR_pwritev |
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ssize_t result; |
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result = SYSCALL_CANCEL (pwritev, fd, vector, count, offset); |
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# ifdef __ASSUME_PWRITEV |
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return result; |
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# endif |
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#endif |
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#ifndef __ASSUME_PWRITEV |
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# ifdef __NR_pwritev |
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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_pwritev_replacement (fd, vector, count, offset); |
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#endif |
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} |
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#undef pwritev64 |
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strong_alias (pwritev, pwritev64) |
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#ifndef __ASSUME_PWRITEV |
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# define PWRITE __pwrite |
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# define PWRITEV static internal_function __atomic_pwritev_replacement |
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# define OFF_T off_t |
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# include <sysdeps/posix/pwritev.c> |
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#endif |
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@ -1 +0,0 @@ |
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/* Empty since the pwritev syscall is equivalent. */ |
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