NetBSD-5.0.2/sys/compat/linux/common/linux_time.c
/* $NetBSD: linux_time.c,v 1.25.6.1 2008/11/20 03:03:05 snj Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Emmanuel Dreyfus.
*
* 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_time.c,v 1.25.6.1 2008/11/20 03:03:05 snj Exp $");
#include <sys/param.h>
#include <sys/ucred.h>
#include <sys/kauth.h>
#include <sys/mount.h>
#include <sys/signal.h>
#include <sys/stdint.h>
#include <sys/time.h>
#include <sys/timetc.h>
#include <sys/systm.h>
#include <sys/sched.h>
#include <sys/syscallargs.h>
#include <sys/lwp.h>
#include <sys/proc.h>
#include <compat/linux/common/linux_types.h>
#include <compat/linux/common/linux_signal.h>
#include <compat/linux/common/linux_machdep.h>
#include <compat/linux/common/linux_sched.h>
#include <compat/linux/common/linux_ipc.h>
#include <compat/linux/common/linux_sem.h>
#include <compat/linux/linux_syscallargs.h>
#include <compat/common/compat_util.h>
static void native_to_linux_timespec(struct linux_timespec *,
struct timespec *);
static void linux_to_native_timespec(struct timespec *,
struct linux_timespec *);
/*
* This is not implemented for alpha yet
*/
#if defined (__i386__) || defined (__m68k__) || \
defined (__powerpc__) || defined (__mips__) || \
defined(__arm__) || defined(__amd64__)
/*
* Linux keeps track of a system timezone in the kernel. It is readen
* by gettimeofday and set by settimeofday. This emulates this behavior
* See linux/kernel/time.c
*/
struct timezone linux_sys_tz;
int
linux_sys_gettimeofday(struct lwp *l, const struct linux_sys_gettimeofday_args *uap, register_t *retval)
{
/* {
syscallarg(struct timeval *) tz;
syscallarg(struct timezone *) tzp;
} */
int error = 0;
if (SCARG(uap, tp)) {
error = sys_gettimeofday(l, (const void *)uap, retval);
if (error)
return (error);
}
if (SCARG(uap, tzp)) {
error = copyout(&linux_sys_tz, SCARG(uap, tzp), sizeof(linux_sys_tz));
if (error)
return (error);
}
return (0);
}
int
linux_sys_settimeofday(struct lwp *l, const struct linux_sys_settimeofday_args *uap, register_t *retval)
{
/* {
syscallarg(struct timeval *) tp;
syscallarg(struct timezone *) tzp;
} */
int error = 0;
if (SCARG(uap, tp)) {
error = sys_settimeofday(l, (const void *)uap, retval);
if (error)
return (error);
}
/*
* If user is not the superuser, we returned
* after the sys_settimeofday() call.
*/
if (SCARG(uap, tzp)) {
error = copyin(SCARG(uap, tzp), &linux_sys_tz, sizeof(linux_sys_tz));
if (error)
return (error);
}
return (0);
}
#endif /* __i386__ || __m68k__ || __powerpc__ || __mips__ || __arm__ */
static void
native_to_linux_timespec(struct linux_timespec *ltp, struct timespec *ntp)
{
ltp->tv_sec = ntp->tv_sec;
ltp->tv_nsec = ntp->tv_nsec;
}
static void
linux_to_native_timespec(struct timespec *ntp, struct linux_timespec *ltp)
{
ntp->tv_sec = ltp->tv_sec;
ntp->tv_nsec = ltp->tv_nsec;
}
int
linux_sys_nanosleep(struct lwp *l, const struct linux_sys_nanosleep_args *uap,
register_t *retval)
{
/* {
syscallarg(struct linux_timespec *) rqtp;
syscallarg(struct linux_timespec *) rmtp;
} */
struct timespec rqts, rmts;
struct linux_timespec lrqts, lrmts;
int error, error1;
error = copyin(SCARG(uap, rqtp), &lrqts, sizeof(lrqts));
if (error != 0)
return error;
linux_to_native_timespec(&rqts, &lrqts);
error = nanosleep1(l, &rqts, SCARG(uap, rmtp) ? &rmts : NULL);
if (SCARG(uap, rmtp) == NULL || (error != 0 && error != EINTR))
return error;
native_to_linux_timespec(&lrmts, &rmts);
error1 = copyout(&lrmts, SCARG(uap, rmtp), sizeof(lrmts));
return error1 ? error1 : error;
}
int
linux_to_native_clockid(clockid_t *n, clockid_t l)
{
switch (l) {
case LINUX_CLOCK_REALTIME:
*n = CLOCK_REALTIME;
break;
case LINUX_CLOCK_MONOTONIC:
*n = CLOCK_MONOTONIC;
break;
case LINUX_CLOCK_PROCESS_CPUTIME_ID:
case LINUX_CLOCK_THREAD_CPUTIME_ID:
case LINUX_CLOCK_REALTIME_HR:
case LINUX_CLOCK_MONOTONIC_HR:
return EINVAL;
}
return 0;
}
int
linux_sys_clock_gettime(struct lwp *l, const struct linux_sys_clock_gettime_args *uap, register_t *retval)
{
/* {
syscallarg(clockid_t) which;
syscallarg(struct linux_timespec *)tp;
} */
struct timespec ts;
struct linux_timespec lts;
switch (SCARG(uap, which)) {
case LINUX_CLOCK_REALTIME:
nanotime(&ts);
break;
case LINUX_CLOCK_MONOTONIC:
nanouptime(&ts);
break;
default:
return EINVAL;
}
native_to_linux_timespec(<s, &ts);
return copyout(<s, SCARG(uap, tp), sizeof lts);
}
int
linux_sys_clock_settime(struct lwp *l, const struct linux_sys_clock_settime_args *uap, register_t *retval)
{
/* {
syscallarg(clockid_t) which;
syscallarg(struct linux_timespec *)tp;
} */
struct timespec ts;
struct linux_timespec lts;
int error;
switch (SCARG(uap, which)) {
case LINUX_CLOCK_REALTIME:
break;
default:
return EINVAL;
}
error = copyin(SCARG(uap, tp), <s, sizeof lts);
if (error != 0)
return error;
linux_to_native_timespec(&ts, <s);
return settime(l->l_proc, &ts);
}
int
linux_sys_clock_getres(struct lwp *l, const struct linux_sys_clock_getres_args *uap, register_t *retval)
{
/* {
syscallarg(clockid_t) which;
syscallarg(struct linux_timespec *)tp;
} */
struct timespec ts;
struct linux_timespec lts;
int error;
clockid_t nwhich = 0; /* XXX: GCC */
error = linux_to_native_clockid(&nwhich, SCARG(uap, which));
if (error != 0 || SCARG(uap, tp) == NULL)
return error;
ts.tv_sec = 0;
ts.tv_nsec = 1000000000 / tc_getfrequency();
native_to_linux_timespec(<s, &ts);
return copyout(<s, SCARG(uap, tp), sizeof lts);
}
int
linux_sys_clock_nanosleep(struct lwp *l, const struct linux_sys_clock_nanosleep_args *uap, register_t *retval)
{
/* {
syscallarg(clockid_t) which;
syscallarg(int) flags;
syscallarg(struct linux_timespec) *rqtp;
syscallarg(struct linux_timespec) *rmtp;
} */
struct linux_timespec lrqts, lrmts;
struct timespec rqts, rmts;
int error, error1;
if (SCARG(uap, flags) != 0)
return EINVAL; /* XXX deal with TIMER_ABSTIME */
if (SCARG(uap, which) != LINUX_CLOCK_REALTIME)
return EINVAL;
error = copyin(SCARG(uap, rqtp), &lrqts, sizeof lrqts);
if (error != 0)
return error;
linux_to_native_timespec(&rqts, &lrqts);
error = nanosleep1(l, &rqts, SCARG(uap, rmtp) ? &rmts : 0);
if (SCARG(uap, rmtp) == NULL || (error != 0 && error != EINTR))
return error;
native_to_linux_timespec(&lrmts, &rmts);
error1 = copyout(&lrmts, SCARG(uap, rmtp), sizeof lrmts);
return error1 ? error1 : error;
}