/*      $NetBSD: netbsd32_sem.c,v 1.12 2019/02/03 03:20:23 thorpej Exp $        */

/*
*  Copyright (c) 2006 The NetBSD Foundation.
*  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.
*
*  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: netbsd32_sem.c,v 1.12 2019/02/03 03:20:23 thorpej Exp $");

#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/dirent.h>
#include <sys/condvar.h>
#include <sys/ksem.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/syscallargs.h>

#include <compat/netbsd32/netbsd32.h>
#include <compat/netbsd32/netbsd32_syscallargs.h>
#include <compat/netbsd32/netbsd32_conv.h>

static int
netbsd32_ksem_copyin(const void *src, void *dst, size_t size)
{
       intptr_t *argp = dst;
       netbsd32_intptr_t arg32;
       int error;

       KASSERT(size == sizeof(intptr_t));

       if ((error = copyin(src, &arg32, sizeof(arg32))) != 0)
               return error;
       *argp = arg32;
       return 0;
}

static int
netbsd32_ksem_copyout(const void *src, void *dst, size_t size)
{
       const intptr_t *idp = src;
       netbsd32_intptr_t id32, *outidp = dst;

       KASSERT(size == sizeof(intptr_t));

       /* Returning a kernel pointer to userspace sucks badly :-( */
       /* (Luckily, it's not actually a pointer. --thorpej */
       id32 = (netbsd32_intptr_t)*idp;
       return copyout(&id32, outidp, sizeof(id32));
}

int
netbsd32__ksem_init(struct lwp *l, const struct netbsd32__ksem_init_args *uap, register_t *retval)
{
       /* {
               syscallarg(unsigned int) value;
               syscallarg(netbsd32_semidp_t) idp;
       } */

       return do_ksem_init(l, SCARG(uap, value),
           SCARG_P32(uap, idp), netbsd32_ksem_copyin, netbsd32_ksem_copyout);
}

int
netbsd32__ksem_open(struct lwp *l, const struct netbsd32__ksem_open_args *uap, register_t *retval)
{
       /* {
               syscallarg(const netbsd32_charp) name;
               syscallarg(int) oflag;
               syscallarg(mode_t) mode;
               syscallarg(unsigned int) value;
               syscallarg(netbsd32_semidp_t) idp;
       } */

       return do_ksem_open(l, SCARG_P32(uap, name),
           SCARG(uap, oflag), SCARG(uap, mode), SCARG(uap, value),
           SCARG_P32(uap, idp), netbsd32_ksem_copyout);
}

int
netbsd32__ksem_unlink(struct lwp *l, const struct netbsd32__ksem_unlink_args *uap, register_t *retval)
{
       /* {
               syscallarg(const netbsd32_charp) name;
       } */
       struct sys__ksem_unlink_args ua;

       NETBSD32TOP_UAP(name, const char);
       return sys__ksem_unlink(l, &ua, retval);
}

int
netbsd32__ksem_close(struct lwp *l, const struct netbsd32__ksem_close_args *uap, register_t *retval)
{
       /* {
               syscallarg(netbsd32_intptr_t) id;
       } */
       struct sys__ksem_close_args ua;

       NETBSD32TOX_UAP(id, intptr_t);
       return sys__ksem_close(l, &ua, retval);
}

int
netbsd32__ksem_post(struct lwp *l, const struct netbsd32__ksem_post_args *uap, register_t *retval)
{
       /* {
               syscallarg(netbsd32_intptr_t) id;
       } */
       struct sys__ksem_post_args ua;

       NETBSD32TOX_UAP(id, intptr_t);
       return sys__ksem_post(l, &ua, retval);
}

int
netbsd32__ksem_wait(struct lwp *l, const struct netbsd32__ksem_wait_args *uap, register_t *retval)
{
       /* {
               syscallarg(netbsd32_intptr_t) id;
       } */

       return do_ksem_wait(l, SCARG(uap, id), false, NULL);
}

int
netbsd32__ksem_trywait(struct lwp *l, const struct netbsd32__ksem_trywait_args *uap, register_t *retval)
{
       /* {
               syscallarg(netbsd32_intptr_t) id;
       } */

       return do_ksem_wait(l, SCARG(uap, id), true, NULL);
}

int
netbsd32__ksem_timedwait(struct lwp *l, const struct netbsd32__ksem_timedwait_args *uap,
   register_t *retval)
{
       /* {
               intptr_t id;
               const netbsd32_timespecp_t abstime;
       } */
       struct netbsd32_timespec ts32;
       struct timespec ts;
       intptr_t id;
       int error;

       id = SCARG(uap, id);

       error = copyin(SCARG_P32(uap, abstime), &ts32, sizeof(ts32));
       if (error != 0)
               return error;
       netbsd32_to_timespec(&ts32, &ts);

       if (ts.tv_sec < 0 || ts.tv_nsec < 0 || ts.tv_nsec >= 1000000000)
               return EINVAL;

       error = do_ksem_wait(l, id, false, &ts);
       if (error == EWOULDBLOCK)
               error = ETIMEDOUT;
       return error;
}

int
netbsd32__ksem_destroy(struct lwp *l, const struct netbsd32__ksem_destroy_args *uap, register_t *retval)
{
       /* {
               syscallarg(netbsd32_intptr_t) id;
       } */
       struct sys__ksem_destroy_args ua;

       NETBSD32TOX_UAP(id, intptr_t);
       return sys__ksem_destroy(l, &ua, retval);
}

int
netbsd32__ksem_getvalue(struct lwp *l, const struct netbsd32__ksem_getvalue_args *uap, register_t *retval)
{
       /* {
               syscallarg(netbsd32_intptr_t) id;
               syscallarg(netbsd32_intp) value;
       } */
       struct sys__ksem_getvalue_args ua;

       NETBSD32TOX_UAP(id, intptr_t);
       NETBSD32TOP_UAP(value, unsigned int);
       return sys__ksem_getvalue(l, &ua, retval);
}

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.