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Restore sparc64 implementation of semctl 

The sparc64 variant of the ipc syscall does not dereference the pointer
argument for the SEMCTL operation.
This commit is contained in:
Andreas Schwab 2015-09-17 15:58:01 +02:00
parent 1f11365a75
commit e67dc1b57f
2 changed files with 58 additions and 0 deletions
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2015-09-17 Andreas Schwab <schwab@suse.de>
* sysdeps/unix/sysv/linux/sparc/sparc64/semctl.c: Readd.
2015-09-16 Joseph Myers <joseph@codesourcery.com>
[BZ #18977]

54
sysdeps/unix/sysv/linux/sparc/sparc64/semctl.c Normal file
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/* Copyright (C) 1995-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
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 <errno.h>
#include <stdarg.h>
#include <sys/sem.h>
#include <ipc_priv.h>
#include <sysdep.h>
#include <sys/syscall.h>
/* Define a `union semun' suitable for Linux here. */
union semun
{
int val; /* value for SETVAL */
struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */
unsigned short int *array; /* array for GETALL & SETALL */
struct seminfo *__buf; /* buffer for IPC_INFO */
};
/* Return identifier for array of NSEMS semaphores associated with
KEY. */
int
semctl (int semid, int semnum, int cmd, ...)
{
union semun arg;
va_list ap;
va_start (ap, cmd);
/* Get the argument. */
arg = va_arg (ap, union semun);
va_end (ap);
return INLINE_SYSCALL (ipc, 5, IPCOP_semctl, semid, semnum, cmd,
arg.array);
}