340 lines
8.7 KiB
C
340 lines
8.7 KiB
C
/* $NetBSD: linux_ipccall.c,v 1.22 2001/11/15 09:48:01 lukem Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Frank van der Linden and Eric Haszlakiewicz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: linux_ipccall.c,v 1.22 2001/11/15 09:48:01 lukem Exp $");
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#if defined(_KERNEL_OPT)
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#include "opt_sysv.h"
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#endif
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#include <sys/param.h>
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#include <sys/shm.h>
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#include <sys/sem.h>
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#include <sys/msg.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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/* real syscalls */
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#include <sys/mount.h>
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#include <sys/syscallargs.h>
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/* sys_ipc + args prototype */
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#include <compat/linux/common/linux_types.h>
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#include <compat/linux/common/linux_signal.h>
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#include <compat/linux/linux_syscallargs.h>
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#include <compat/linux/linux_syscall.h>
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/* general ipc defines */
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#include <compat/linux/common/linux_ipc.h>
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/* prototypes for real/normal linux-emul syscalls */
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#include <compat/linux/common/linux_msg.h>
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#include <compat/linux/common/linux_shm.h>
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#include <compat/linux/common/linux_sem.h>
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/* prototypes for sys_ipc stuff */
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#include <compat/linux/common/linux_ipccall.h>
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/* Used on: arm, i386, m68k, mips, ppc, sparc, sparc64 */
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/* Not used on: alpha */
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/*
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* Stuff to deal with the SysV ipc/shm/semaphore interface in Linux.
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* The main difference is, that Linux handles it all via one
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* system call, which has the usual maximum amount of 5 arguments.
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* This results in a kludge for calls that take 6 of them.
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*
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* The SYSV??? options have to be enabled to get the appropriate
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* functions to work.
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*/
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int
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linux_sys_ipc(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct linux_sys_ipc_args /* {
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syscallarg(int) what;
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syscallarg(int) a1;
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syscallarg(int) a2;
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syscallarg(int) a3;
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syscallarg(caddr_t) ptr;
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} */ *uap = v;
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switch (SCARG(uap, what)) {
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#ifdef SYSVSEM
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case LINUX_SYS_semop:
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return linux_semop(p, uap, retval);
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case LINUX_SYS_semget:
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return linux_semget(p, uap, retval);
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case LINUX_SYS_semctl: {
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struct linux_sys_semctl_args bsa;
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union linux_semun arg;
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int error;
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SCARG(&bsa, semid) = SCARG(uap, a1);
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SCARG(&bsa, semnum) = SCARG(uap, a2);
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SCARG(&bsa, cmd) = SCARG(uap, a3);
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/* Convert from (union linux_semun *) to (union linux_semun) */
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if ((error = copyin(SCARG(uap, ptr), &arg, sizeof arg)))
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return error;
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SCARG(&bsa, arg) = arg;
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return linux_sys_semctl(p, &bsa, retval);
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}
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#endif
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#ifdef SYSVMSG
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case LINUX_SYS_msgsnd:
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return linux_msgsnd(p, uap, retval);
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case LINUX_SYS_msgrcv:
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return linux_msgrcv(p, uap, retval);
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case LINUX_SYS_msgget:
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return linux_msgget(p, uap, retval);
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case LINUX_SYS_msgctl: {
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struct linux_sys_msgctl_args bsa;
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SCARG(&bsa, msqid) = SCARG(uap, a1);
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SCARG(&bsa, cmd) = SCARG(uap, a2);
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SCARG(&bsa, buf) = (struct linux_msqid_ds *)SCARG(uap, ptr);
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return linux_sys_msgctl(p, &bsa, retval);
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}
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#endif
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#ifdef SYSVSHM
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case LINUX_SYS_shmat: {
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struct linux_sys_shmat_args bsa;
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SCARG(&bsa, shmid) = SCARG(uap, a1);
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SCARG(&bsa, shmaddr) = (void *)SCARG(uap, ptr);
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SCARG(&bsa, shmflg) = SCARG(uap, a2);
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/* XXX passing pointer inside int here */
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SCARG(&bsa, raddr) = (u_long *)SCARG(uap, a3);
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return linux_sys_shmat(p, &bsa, retval);
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}
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case LINUX_SYS_shmdt:
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return linux_shmdt(p, uap, retval);
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case LINUX_SYS_shmget:
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return linux_shmget(p, uap, retval);
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case LINUX_SYS_shmctl: {
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struct linux_sys_shmctl_args bsa;
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SCARG(&bsa, shmid) = SCARG(uap, a1);
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SCARG(&bsa, cmd) = SCARG(uap, a2);
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SCARG(&bsa, buf) = (struct linux_shmid_ds *)SCARG(uap, ptr);
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return linux_sys_shmctl(p, &bsa, retval);
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}
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#endif
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default:
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return ENOSYS;
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}
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}
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#ifdef SYSVSEM
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inline int
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linux_semop(p, uap, retval)
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struct proc *p;
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struct linux_sys_ipc_args /* {
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syscallarg(int) what;
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syscallarg(int) a1;
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syscallarg(int) a2;
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syscallarg(int) a3;
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syscallarg(caddr_t) ptr;
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} */ *uap;
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register_t *retval;
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{
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struct sys_semop_args bsa;
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SCARG(&bsa, semid) = SCARG(uap, a1);
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SCARG(&bsa, sops) = (struct sembuf *)SCARG(uap, ptr);
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SCARG(&bsa, nsops) = SCARG(uap, a2);
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return sys_semop(p, &bsa, retval);
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}
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inline int
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linux_semget(p, uap, retval)
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struct proc *p;
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struct linux_sys_ipc_args /* {
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syscallarg(int) what;
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syscallarg(int) a1;
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syscallarg(int) a2;
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syscallarg(int) a3;
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syscallarg(caddr_t) ptr;
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} */ *uap;
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register_t *retval;
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{
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struct sys_semget_args bsa;
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SCARG(&bsa, key) = (key_t)SCARG(uap, a1);
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SCARG(&bsa, nsems) = SCARG(uap, a2);
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SCARG(&bsa, semflg) = SCARG(uap, a3);
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return sys_semget(p, &bsa, retval);
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}
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#endif /* SYSVSEM */
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#ifdef SYSVMSG
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inline int
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linux_msgsnd(p, uap, retval)
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struct proc *p;
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struct linux_sys_ipc_args /* {
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syscallarg(int) what;
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syscallarg(int) a1;
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syscallarg(int) a2;
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syscallarg(int) a3;
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syscallarg(caddr_t) ptr;
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} */ *uap;
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register_t *retval;
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{
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struct sys_msgsnd_args bma;
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SCARG(&bma, msqid) = SCARG(uap, a1);
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SCARG(&bma, msgp) = SCARG(uap, ptr);
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SCARG(&bma, msgsz) = SCARG(uap, a2);
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SCARG(&bma, msgflg) = SCARG(uap, a3);
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return sys_msgsnd(p, &bma, retval);
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}
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inline int
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linux_msgrcv(p, uap, retval)
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struct proc *p;
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struct linux_sys_ipc_args /* {
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syscallarg(int) what;
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syscallarg(int) a1;
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syscallarg(int) a2;
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syscallarg(int) a3;
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syscallarg(caddr_t) ptr;
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} */ *uap;
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register_t *retval;
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{
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struct sys_msgrcv_args bma;
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struct linux_msgrcv_msgarg kluge;
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int error;
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if ((error = copyin(SCARG(uap, ptr), &kluge, sizeof kluge)))
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return error;
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SCARG(&bma, msqid) = SCARG(uap, a1);
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SCARG(&bma, msgp) = kluge.msg;
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SCARG(&bma, msgsz) = SCARG(uap, a2);
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SCARG(&bma, msgtyp) = kluge.type;
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SCARG(&bma, msgflg) = SCARG(uap, a3);
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return sys_msgrcv(p, &bma, retval);
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}
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inline int
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linux_msgget(p, uap, retval)
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struct proc *p;
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struct linux_sys_ipc_args /* {
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syscallarg(int) what;
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syscallarg(int) a1;
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syscallarg(int) a2;
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syscallarg(int) a3;
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syscallarg(caddr_t) ptr;
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} */ *uap;
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register_t *retval;
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{
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struct sys_msgget_args bma;
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SCARG(&bma, key) = (key_t)SCARG(uap, a1);
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SCARG(&bma, msgflg) = SCARG(uap, a2);
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return sys_msgget(p, &bma, retval);
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}
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#endif /* SYSVMSG */
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#ifdef SYSVSHM
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/*
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* shmdt(): this could have been mapped directly, if it wasn't for
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* the extra indirection by the linux_ipc system call.
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*/
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inline int
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linux_shmdt(p, uap, retval)
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struct proc *p;
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struct linux_sys_ipc_args /* {
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syscallarg(int) what;
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syscallarg(int) a1;
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syscallarg(int) a2;
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syscallarg(int) a3;
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syscallarg(caddr_t) ptr;
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} */ *uap;
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register_t *retval;
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{
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struct sys_shmdt_args bsa;
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SCARG(&bsa, shmaddr) = SCARG(uap, ptr);
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return sys_shmdt(p, &bsa, retval);
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}
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/*
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* Same story as shmdt.
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*/
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inline int
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linux_shmget(p, uap, retval)
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struct proc *p;
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struct linux_sys_ipc_args /* {
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syscallarg(int) what;
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syscallarg(int) a1;
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syscallarg(int) a2;
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syscallarg(int) a3;
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syscallarg(caddr_t) ptr;
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} */ *uap;
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register_t *retval;
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{
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struct sys_shmget_args bsa;
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SCARG(&bsa, key) = SCARG(uap, a1);
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SCARG(&bsa, size) = SCARG(uap, a2);
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SCARG(&bsa, shmflg) = SCARG(uap, a3);
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return sys_shmget(p, &bsa, retval);
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}
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#endif /* SYSVSHM */
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