NetBSD/sys/compat/netbsd32/netbsd32_compat_14_sysv.c

/*	$NetBSD: netbsd32_compat_14_sysv.c,v 1.4 2021/01/19 03:20:13 simonb Exp $	*/

/*
 * Copyright (c) 1999 Eduardo E. Horvath
 * All rights reserved.
 *
 * 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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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: netbsd32_compat_14_sysv.c,v 1.4 2021/01/19 03:20:13 simonb Exp $");

#ifdef _KERNEL_OPT
#include "opt_sysv.h"
#include "opt_compat_netbsd.h"
#endif

#include <sys/param.h>
#include <sys/ipc.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/signal.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/msg.h>
#include <sys/sem.h>
#include <sys/shm.h>

#include <sys/syscallargs.h>
#include <sys/syscallvar.h>

#include <compat/netbsd32/netbsd32.h>
#include <compat/netbsd32/netbsd32_syscall.h>
#include <compat/netbsd32/netbsd32_syscallargs.h>
#include <compat/sys/siginfo.h>
#include <compat/sys/shm.h>

#if defined(COMPAT_14)

#if defined(SYSVMSG)
static inline void
netbsd32_ipc_perm14_to_native(struct netbsd32_ipc_perm14 *operm, struct ipc_perm *perm)
{

#define	CVT(x)	perm->x = operm->x
	CVT(uid);
	CVT(gid);
	CVT(cuid);
	CVT(cgid);
	CVT(mode);
#undef CVT
}

static inline void
native_to_netbsd32_ipc_perm14(struct ipc_perm *perm, struct netbsd32_ipc_perm14 *operm)
{

	memset(operm, 0, sizeof *operm);
#define	CVT(x)	operm->x = perm->x
	CVT(uid);
	CVT(gid);
	CVT(cuid);
	CVT(cgid);
	CVT(mode);
#undef CVT

	/*
	 * Not part of the API, but some programs might look at it.
	 */
	operm->seq = perm->_seq;
	operm->key = (key_t)perm->_key;
}

static inline void
netbsd32_msqid_ds14_to_native(struct netbsd32_msqid_ds14 *omsqbuf, struct msqid_ds *msqbuf)
{

	netbsd32_ipc_perm14_to_native(&omsqbuf->msg_perm, &msqbuf->msg_perm);

#define	CVT(x)	msqbuf->x = omsqbuf->x
	CVT(msg_qnum);
	CVT(msg_qbytes);
	CVT(msg_lspid);
	CVT(msg_lrpid);
	CVT(msg_stime);
	CVT(msg_rtime);
	CVT(msg_ctime);
#undef CVT
}

static inline void
native_to_netbsd32_msqid_ds14(struct msqid_ds *msqbuf, struct netbsd32_msqid_ds14 *omsqbuf)
{

	memset(omsqbuf, 0, sizeof *omsqbuf);
	native_to_netbsd32_ipc_perm14(&msqbuf->msg_perm, &omsqbuf->msg_perm);

#define	CVT(x)	omsqbuf->x = msqbuf->x
	CVT(msg_qnum);
	CVT(msg_qbytes);
	CVT(msg_lspid);
	CVT(msg_lrpid);
	CVT(msg_stime);
	CVT(msg_rtime);
	CVT(msg_ctime);
#undef CVT

	/*
	 * Not part of the API, but some programs might look at it.
	 */
	omsqbuf->msg_cbytes = msqbuf->_msg_cbytes;
}
#endif

#if defined(SYSVSEM)
static inline void
netbsd32_semid_ds14_to_native(struct netbsd32_semid_ds14 *osembuf, struct semid_ds *sembuf)
{

	netbsd32_ipc_perm14_to_native(&osembuf->sem_perm, &sembuf->sem_perm);

#define	CVT(x)	sembuf->x = osembuf->x
	CVT(sem_nsems);
	CVT(sem_otime);
	CVT(sem_ctime);
#undef CVT
}

static inline void
native_to_netbsd32_semid_ds14(struct semid_ds *sembuf, struct netbsd32_semid_ds14 *osembuf)
{

	memset(osembuf, 0, sizeof *osembuf);
	native_to_netbsd32_ipc_perm14(&sembuf->sem_perm, &osembuf->sem_perm);

#define	CVT(x)	osembuf->x = sembuf->x
	CVT(sem_nsems);
	CVT(sem_otime);
	CVT(sem_ctime);
#undef CVT
}

static inline void
netbsd32_shmid_ds14_to_native(struct netbsd32_shmid_ds14 *oshmbuf, struct shmid_ds *shmbuf)
{

	netbsd32_ipc_perm14_to_native(&oshmbuf->shm_perm, &shmbuf->shm_perm);

#define	CVT(x)	shmbuf->x = oshmbuf->x
	CVT(shm_segsz);
	CVT(shm_lpid);
	CVT(shm_cpid);
	CVT(shm_nattch);
	CVT(shm_atime);
	CVT(shm_dtime);
	CVT(shm_ctime);
#undef CVT
}

static inline void
native_to_netbsd32_shmid_ds14(struct shmid_ds *shmbuf, struct netbsd32_shmid_ds14 *oshmbuf)
{

	memset(oshmbuf, 0, sizeof *oshmbuf);
	native_to_netbsd32_ipc_perm14(&shmbuf->shm_perm, &oshmbuf->shm_perm);

#define	CVT(x)	oshmbuf->x = shmbuf->x
	CVT(shm_segsz);
	CVT(shm_lpid);
	CVT(shm_cpid);
	CVT(shm_nattch);
	CVT(shm_atime);
	CVT(shm_dtime);
	CVT(shm_ctime);
#undef CVT
}

/*
 * the compat_14 system calls
 */
int
compat_14_netbsd32_msgctl(struct lwp *l, const struct compat_14_netbsd32_msgctl_args *uap, register_t *retval)
{
	/* {
		syscallarg(int) msqid;
		syscallarg(int) cmd;
		syscallarg(struct msqid_ds14 *) buf;
	} */
	struct msqid_ds msqbuf;
	struct netbsd32_msqid_ds14 omsqbuf;
	int cmd, error;

	cmd = SCARG(uap, cmd);

	if (cmd == IPC_SET) {
		error = copyin(SCARG_P32(uap, buf),
		    &omsqbuf, sizeof(omsqbuf));
		if (error)
			return error;
		netbsd32_msqid_ds14_to_native(&omsqbuf, &msqbuf);
	}

	error = msgctl1(l, SCARG(uap, msqid), cmd,
	    (cmd == IPC_SET || cmd == IPC_STAT) ? &msqbuf : NULL);

	if (error == 0 && cmd == IPC_STAT) {
		native_to_netbsd32_msqid_ds14(&msqbuf, &omsqbuf);
		error = copyout(&omsqbuf,
		    SCARG_P32(uap, buf), sizeof(omsqbuf));
	}

	return error;
}
#endif

#if defined(SYSVSEM)
int
compat_14_netbsd32___semctl(struct lwp *l, const struct compat_14_netbsd32___semctl_args *uap, register_t *retval)
{
	/* {
		syscallarg(int) semid;
		syscallarg(int) semnum;
		syscallarg(int) cmd;
		syscallarg(union __semun *) arg;
	} */
	union __semun arg;
	struct semid_ds sembuf;
	struct netbsd32_semid_ds14 osembuf;
	int cmd, error;
	void *pass_arg = NULL;

	cmd = SCARG(uap, cmd);

	switch (cmd) {
	case IPC_SET:
	case IPC_STAT:
		pass_arg = &sembuf;
		break;

	case GETALL:
	case SETVAL:
	case SETALL:
		pass_arg = &arg;
		break;
	}

	if (pass_arg != NULL) {
		error = copyin(NETBSD32IPTR64(SCARG(uap, arg)), &arg,
		    sizeof(arg));
		if (error)
			return error;
		if (cmd == IPC_SET) {
			error = copyin(arg.buf, &osembuf, sizeof(osembuf));
			if (error)
				return error;
			netbsd32_semid_ds14_to_native(&osembuf, &sembuf);
		}
	}

	error = semctl1(l, SCARG(uap, semid), SCARG(uap, semnum), cmd,
	    pass_arg, retval);

	if (error == 0 && cmd == IPC_STAT) {
		native_to_netbsd32_semid_ds14(&sembuf, &osembuf);
		error = copyout(&osembuf, arg.buf, sizeof(osembuf));
	}

	return error;
}
#endif

#if defined(SYSVSHM)
int
compat_14_netbsd32_shmctl(struct lwp *l, const struct compat_14_netbsd32_shmctl_args *uap, register_t *retval)
{
	/* {
		syscallarg(int) shmid;
		syscallarg(int) cmd;
		syscallarg(struct netbsd32_shmid_ds14 *) buf;
	} */
	struct shmid_ds shmbuf;
	struct netbsd32_shmid_ds14 oshmbuf;
	int cmd, error;

	cmd = SCARG(uap, cmd);

	if (cmd == IPC_SET) {
		error = copyin(SCARG_P32(uap, buf), &oshmbuf, sizeof(oshmbuf));
		if (error)
			return error;
		netbsd32_shmid_ds14_to_native(&oshmbuf, &shmbuf);
	}

	error = shmctl1(l, SCARG(uap, shmid), cmd,
	    (cmd == IPC_SET || cmd == IPC_STAT) ? &shmbuf : NULL);

	if (error == 0 && cmd == IPC_STAT) {
		native_to_netbsd32_shmid_ds14(&shmbuf, &oshmbuf);
		error = copyout(&oshmbuf, SCARG_P32(uap, buf), sizeof(oshmbuf));
	}

	return error;
}
#endif

#define REQ1    "sysv_ipc,compat_sysv_14,"
#define REQ2    "compat_netbsd32,compat_netbsd32_sysvipc,"
#define REQ3    "compat_netbsd32_sysvipc_50"  

#define _PKG_ENTRY(name)        \
	{ NETBSD32_SYS_ ## name, 0, (sy_call_t *)name }

static const struct syscall_package compat_sysvipc_14_syscalls[] = {
#if defined(SYSVSEM)
	_PKG_ENTRY(compat_14_netbsd32___semctl),
#endif
#if defined(SYSVSHM)
	_PKG_ENTRY(compat_14_netbsd32_shmctl),
#endif
#if defined(SYSVMSG)
	_PKG_ENTRY(compat_14_netbsd32_msgctl),
#endif
	{ 0, 0, NULL }
};
 
#define REQ1    "sysv_ipc,compat_sysv_14,"
#define REQ2    "compat_netbsd32,compat_netbsd32_sysvipc,"
#define REQ3    "compat_netbsd32_sysvipc_50"

MODULE(MODULE_CLASS_EXEC, compat_netbsd32_sysvipc_14, REQ1 REQ2 REQ3 );
 
static int
compat_netbsd32_sysvipc_14_modcmd(modcmd_t cmd, void *arg)
{
 
	switch (cmd) {
	case MODULE_CMD_INIT:
		return syscall_establish(&emul_netbsd32,
		    compat_sysvipc_14_syscalls);
 
	case MODULE_CMD_FINI:
		return syscall_disestablish(&emul_netbsd32,
		    compat_sysvipc_14_syscalls);
 
	default:
		return ENOTTY;
	}
}

#endif /* COMPAT_14 */