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      1 /*	$NetBSD: kern_50.c,v 1.3 2020/01/29 15:47:51 ad Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2008, 2009, 2020 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Christos Zoulas.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 #include <sys/cdefs.h>
     32 __KERNEL_RCSID(0, "$NetBSD: kern_50.c,v 1.3 2020/01/29 15:47:51 ad Exp $");
     33 
     34 #if defined(_KERNEL_OPT)
     35 #include "opt_compat_netbsd.h"
     36 #endif
     37 
     38 #include <sys/param.h>
     39 #include <sys/lwp.h>
     40 #include <sys/proc.h>
     41 #include <sys/syscall.h>
     42 #include <sys/syscallvar.h>
     43 #include <sys/syscallargs.h>
     44 
     45 #include <compat/sys/resource.h>
     46 #include <compat/sys/time.h>
     47 
     48 #include <compat/common/compat_mod.h>
     49 
     50 static const struct syscall_package kern_50_syscalls[] = {
     51 	{ SYS_compat_50__lwp_park, 0, (sy_call_t *)compat_50_sys__lwp_park },
     52 	{ SYS_compat_50___sigtimedwait, 0,
     53 	    (sy_call_t *)compat_50_sys___sigtimedwait },
     54 	{ SYS_compat_50_wait4, 0, (sy_call_t *)compat_50_sys_wait4 },
     55 	{ 0, 0, NULL }
     56 };
     57 
     58 int
     59 compat_50_sys__lwp_park(struct lwp *l,
     60     const struct compat_50_sys__lwp_park_args *uap, register_t *retval)
     61 {
     62 	/* {
     63 		syscallarg(const struct timespec50 *)	ts;
     64 		syscallarg(lwpid_t)			unpark;
     65 		syscallarg(const void *)		hint;
     66 		syscallarg(const void *)		unparkhint;
     67 	} */
     68 	struct timespec ts, *tsp;
     69 	struct timespec50 ts50;
     70 	int error;
     71 
     72 	if (SCARG(uap, ts) == NULL)
     73 		tsp = NULL;
     74 	else {
     75 		error = copyin(SCARG(uap, ts), &ts50, sizeof(ts50));
     76 		if (error != 0)
     77 			return error;
     78 		timespec50_to_timespec(&ts50, &ts);
     79 		tsp = &ts;
     80 	}
     81 
     82 	if (SCARG(uap, unpark) != 0) {
     83 		error = lwp_unpark(&SCARG(uap, unpark), 1);
     84 		if (error != 0)
     85 			return error;
     86 	}
     87 
     88 	return lwp_park(CLOCK_REALTIME, TIMER_ABSTIME, tsp);
     89 }
     90 
     91 static int
     92 tscopyin(const void *u, void *s, size_t len)
     93 {
     94 	struct timespec50 ts50;
     95 	int error;
     96 
     97 	KASSERT(len == sizeof(struct timespec));
     98 	error = copyin(u, &ts50, sizeof(ts50));
     99 	if (error)
    100 		return error;
    101 	timespec50_to_timespec(&ts50, s);
    102 	return 0;
    103 }
    104 
    105 static int
    106 tscopyout(const void *s, void *u, size_t len)
    107 {
    108 	struct timespec50 ts50;
    109 
    110 	KASSERT(len == sizeof(struct timespec));
    111 	timespec_to_timespec50(s, &ts50);
    112 	return copyout(&ts50, u, sizeof(ts50));
    113 }
    114 
    115 int
    116 compat_50_sys___sigtimedwait(struct lwp *l,
    117     const struct compat_50_sys___sigtimedwait_args *uap, register_t *retval)
    118 {
    119 	int res;
    120 
    121 	res = sigtimedwait1(l,
    122 	    (const struct sys_____sigtimedwait50_args *)uap, retval, copyin,
    123 	    copyout, tscopyin, tscopyout);
    124 	if (!res)
    125 		*retval = 0; /* XXX NetBSD<=5 was not POSIX compliant */
    126 	return res;
    127 }
    128 
    129 int
    130 compat_50_sys_wait4(struct lwp *l, const struct compat_50_sys_wait4_args *uap,
    131     register_t *retval)
    132 {
    133 	/* {
    134 		syscallarg(int)			pid;
    135 		syscallarg(int *)		status;
    136 		syscallarg(int)			options;
    137 		syscallarg(struct rusage50 *)	rusage;
    138 	} */
    139 	int status, error, pid = SCARG(uap, pid);
    140 	struct rusage50 ru50;
    141 	struct rusage ru;
    142 
    143 	error = do_sys_wait(&pid, &status, SCARG(uap, options),
    144 	    SCARG(uap, rusage) != NULL ? &ru : NULL);
    145 
    146 	retval[0] = pid;
    147 	if (pid == 0)
    148 		return error;
    149 
    150 	if (SCARG(uap, rusage)) {
    151 		rusage_to_rusage50(&ru, &ru50);
    152 		error = copyout(&ru50, SCARG(uap, rusage), sizeof(ru50));
    153 	}
    154 
    155 	if (error == 0 && SCARG(uap, status))
    156 		error = copyout(&status, SCARG(uap, status), sizeof(status));
    157 
    158 	return error;
    159 }
    160 
    161 int
    162 kern_50_init(void)
    163 {
    164 
    165 	return syscall_establish(NULL, kern_50_syscalls);
    166 }
    167 
    168 int
    169 kern_50_fini(void)
    170 {
    171 
    172 	return syscall_disestablish(NULL, kern_50_syscalls);
    173 }
    174