NetBSD-5.0.2/sys/compat/linux/common/linux_ipccall.c
/* $NetBSD: linux_ipccall.c,v 1.31 2008/04/28 20:23:43 martin Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Frank van der Linden and Eric Haszlakiewicz.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: linux_ipccall.c,v 1.31 2008/04/28 20:23:43 martin Exp $");
#if defined(_KERNEL_OPT)
#include "opt_sysv.h"
#endif
#include <sys/param.h>
#include <sys/shm.h>
#include <sys/sem.h>
#include <sys/msg.h>
#include <sys/proc.h>
#include <sys/systm.h>
/* real syscalls */
#include <sys/mount.h>
#include <sys/syscallargs.h>
/* sys_ipc + args prototype */
#include <compat/linux/common/linux_types.h>
#include <compat/linux/common/linux_signal.h>
#include <compat/linux/linux_syscallargs.h>
#include <compat/linux/linux_syscall.h>
/* general ipc defines */
#include <compat/linux/common/linux_ipc.h>
/* prototypes for real/normal linux-emul syscalls */
#include <compat/linux/common/linux_msg.h>
#include <compat/linux/common/linux_shm.h>
#include <compat/linux/common/linux_sem.h>
/* prototypes for sys_ipc stuff */
#include <compat/linux/common/linux_ipccall.h>
/* Used on: arm, i386, m68k, mips, ppc, sparc, sparc64 */
/* Not used on: alpha */
/*
* Stuff to deal with the SysV ipc/shm/semaphore interface in Linux.
* The main difference is, that Linux handles it all via one
* system call, which has the usual maximum amount of 5 arguments.
* This results in a kludge for calls that take 6 of them.
*
* The SYSV??? options have to be enabled to get the appropriate
* functions to work.
*/
int
linux_sys_ipc(struct lwp *l, const struct linux_sys_ipc_args *uap, register_t *retval)
{
/* {
syscallarg(int) what;
syscallarg(int) a1;
syscallarg(int) a2;
syscallarg(int) a3;
syscallarg(void *) ptr;
} */
switch (SCARG(uap, what)) {
#ifdef SYSVSEM
case LINUX_SYS_semop:
return linux_semop(l, uap, retval);
case LINUX_SYS_semget:
return linux_semget(l, uap, retval);
case LINUX_SYS_semctl: {
struct linux_sys_semctl_args bsa;
union linux_semun arg;
int error;
SCARG(&bsa, semid) = SCARG(uap, a1);
SCARG(&bsa, semnum) = SCARG(uap, a2);
SCARG(&bsa, cmd) = SCARG(uap, a3);
/* Convert from (union linux_semun *) to (union linux_semun) */
if ((error = copyin(SCARG(uap, ptr), &arg, sizeof arg)))
return error;
SCARG(&bsa, arg) = arg;
return linux_sys_semctl(l, &bsa, retval);
}
#endif
#ifdef SYSVMSG
case LINUX_SYS_msgsnd:
return linux_msgsnd(l, uap, retval);
case LINUX_SYS_msgrcv:
return linux_msgrcv(l, uap, retval);
case LINUX_SYS_msgget:
return linux_msgget(l, uap, retval);
case LINUX_SYS_msgctl: {
struct linux_sys_msgctl_args bsa;
SCARG(&bsa, msqid) = SCARG(uap, a1);
SCARG(&bsa, cmd) = SCARG(uap, a2);
SCARG(&bsa, buf) = (struct linux_msqid_ds *)SCARG(uap, ptr);
return linux_sys_msgctl(l, &bsa, retval);
}
#endif
#ifdef SYSVSHM
case LINUX_SYS_shmat: {
struct linux_sys_shmat_args bsa;
SCARG(&bsa, shmid) = SCARG(uap, a1);
SCARG(&bsa, shmaddr) = (void *)SCARG(uap, ptr);
SCARG(&bsa, shmflg) = SCARG(uap, a2);
/* XXX passing pointer inside int here */
SCARG(&bsa, raddr) = (u_long *)SCARG(uap, a3);
return linux_sys_shmat(l, &bsa, retval);
}
case LINUX_SYS_shmdt:
return linux_shmdt(l, uap, retval);
case LINUX_SYS_shmget:
return linux_shmget(l, uap, retval);
case LINUX_SYS_shmctl: {
struct linux_sys_shmctl_args bsa;
SCARG(&bsa, shmid) = SCARG(uap, a1);
SCARG(&bsa, cmd) = SCARG(uap, a2);
SCARG(&bsa, buf) = (struct linux_shmid_ds *)SCARG(uap, ptr);
return linux_sys_shmctl(l, &bsa, retval);
}
#endif
default:
return ENOSYS;
}
}
#ifdef SYSVSEM
inline int
linux_semop(struct lwp *l, const struct linux_sys_ipc_args *uap, register_t *retval)
{
/* {
syscallarg(int) what;
syscallarg(int) a1;
syscallarg(int) a2;
syscallarg(int) a3;
syscallarg(void *) ptr;
} */
struct sys_semop_args bsa;
SCARG(&bsa, semid) = SCARG(uap, a1);
SCARG(&bsa, sops) = (struct sembuf *)SCARG(uap, ptr);
SCARG(&bsa, nsops) = SCARG(uap, a2);
return sys_semop(l, &bsa, retval);
}
inline int
linux_semget(struct lwp *l, const struct linux_sys_ipc_args *uap, register_t *retval)
{
/* {
syscallarg(int) what;
syscallarg(int) a1;
syscallarg(int) a2;
syscallarg(int) a3;
syscallarg(void *) ptr;
} */
struct sys_semget_args bsa;
SCARG(&bsa, key) = (key_t)SCARG(uap, a1);
SCARG(&bsa, nsems) = SCARG(uap, a2);
SCARG(&bsa, semflg) = SCARG(uap, a3);
return sys_semget(l, &bsa, retval);
}
#endif /* SYSVSEM */
#ifdef SYSVMSG
inline int
linux_msgsnd(struct lwp *l, const struct linux_sys_ipc_args *uap, register_t *retval)
{
struct sys_msgsnd_args bma;
SCARG(&bma, msqid) = SCARG(uap, a1);
SCARG(&bma, msgp) = SCARG(uap, ptr);
SCARG(&bma, msgsz) = SCARG(uap, a2);
SCARG(&bma, msgflg) = SCARG(uap, a3);
return sys_msgsnd(l, &bma, retval);
}
inline int
linux_msgrcv(struct lwp *l, const struct linux_sys_ipc_args *uap, register_t *retval)
{
struct sys_msgrcv_args bma;
struct linux_msgrcv_msgarg kluge;
int error;
if ((error = copyin(SCARG(uap, ptr), &kluge, sizeof kluge)))
return error;
SCARG(&bma, msqid) = SCARG(uap, a1);
SCARG(&bma, msgp) = kluge.msg;
SCARG(&bma, msgsz) = SCARG(uap, a2);
SCARG(&bma, msgtyp) = kluge.type;
SCARG(&bma, msgflg) = SCARG(uap, a3);
return sys_msgrcv(l, &bma, retval);
}
inline int
linux_msgget(struct lwp *l, const struct linux_sys_ipc_args *uap, register_t *retval)
{
struct sys_msgget_args bma;
SCARG(&bma, key) = (key_t)SCARG(uap, a1);
SCARG(&bma, msgflg) = SCARG(uap, a2);
return sys_msgget(l, &bma, retval);
}
#endif /* SYSVMSG */
#ifdef SYSVSHM
/*
* shmdt(): this could have been mapped directly, if it wasn't for
* the extra indirection by the linux_ipc system call.
*/
inline int
linux_shmdt(struct lwp *l, const struct linux_sys_ipc_args *uap, register_t *retval)
{
struct sys_shmdt_args bsa;
SCARG(&bsa, shmaddr) = SCARG(uap, ptr);
return sys_shmdt(l, &bsa, retval);
}
/*
* Same story as shmdt.
*/
inline int
linux_shmget(struct lwp *l, const struct linux_sys_ipc_args *uap, register_t *retval)
{
struct linux_sys_shmget_args bsa;
SCARG(&bsa, key) = SCARG(uap, a1);
SCARG(&bsa, size) = SCARG(uap, a2);
SCARG(&bsa, shmflg) = SCARG(uap, a3);
return linux_sys_shmget(l, &bsa, retval);
}
#endif /* SYSVSHM */