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Consolidate Linux select implementation

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This patch consolidates the select Linux syscall implementation on
sysdeps/unix/sysv/linux/select.c.  The changes are:

  1. Remove select from auto-generation syscalls.list on the architecture
     that uses __NR_select.
  2. Remove generic implementation add a default one that handle all
     current cases (with the expection of alpha)
     The new default implementation will either use __NR_select if
     available of fallback to __NR_pselect6 otherwise.
  3. Add a alpha outlier implementation which requires old compatibility
     symbols.

Checked on i686-linux-gnu, x86_64-linux-gnu, x86_64-linux-gnux32,
arch64-linux-gnu, arm-linux-gnueabihf, and powerpc64le-linux-gnu.

	* sysdeps/unix/sysv/linux/alpha/Makefile (sysdep_routines): Add
	osf_select.
	* sysdeps/unix/sysv/linux/alpha/select.c: New file.
	* sysdeps/unix/sysv/linux/alpha/syscalls.list: Remove select and
	osf_select from auto-generation list.
	* sysdeps/unix/sysv/linux/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/generic/select.c: Remove file.
	* sysdeps/unix/sysv/linux/select.c: New file.
This commit is contained in:
Adhemerval Zanella
2016-11-18 14:27:03 -02:00
parent b5eede9730
commit 26f28fd73d
7 changed files with 78 additions and 11 deletions
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53
sysdeps/unix/sysv/linux/alpha/select.c Normal file
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/* Linux/alpha select implementation.
Copyright (C) 2017 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
<http://www.gnu.org/licenses/>. */
#include <sys/time.h>
#include <sys/types.h>
#include <sys/select.h>
#include <errno.h>
#include <sysdep-cancel.h>
#include <shlib-compat.h>
int
__new_select (int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
struct timeval *timeout)
{
return SYSCALL_CANCEL (select, nfds, readfds, writefds, exceptfds, timeout);
}
strong_alias (__new_select, __select)
libc_hidden_def (__select)
default_symbol_version (__new_select, select, GLIBC_2.1);
strong_alias (__new_select, __new_select_private);
symbol_version (__new_select_private, __select, GLIBC_2.1);
/* Old timeval32 compat calls. */
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
int
__select_tv32 (int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
struct timeval *timeout)
{
return SYSCALL_CANCEL (osf_select, nfds, readfds, writefds, exceptfds,
timeout);
}
strong_alias (__select_tv32, __select_tv32_1)
compat_symbol (libc, __select_tv32, __select, GLIBC_2_0);
compat_symbol (libc, __select_tv32_1, select, GLIBC_2_0);
#endif