NetBSD/sys/compat/mach/mach_thread.c

194 lines
6.1 KiB
C

/* $NetBSD: mach_thread.c,v 1.18 2003/01/30 19:14:19 manu Exp $ */
/*-
* Copyright (c) 2002 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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: mach_thread.c,v 1.18 2003/01/30 19:14:19 manu Exp $");
#include <sys/types.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/signal.h>
#include <sys/lock.h>
#include <sys/queue.h>
#include <sys/proc.h>
#include <compat/mach/mach_types.h>
#include <compat/mach/mach_message.h>
#include <compat/mach/mach_exec.h>
#include <compat/mach/mach_clock.h>
#include <compat/mach/mach_port.h>
#include <compat/mach/mach_thread.h>
#include <compat/mach/mach_errno.h>
#include <compat/mach/mach_syscallargs.h>
int
mach_sys_syscall_thread_switch(l, v, retval)
struct lwp *l;
void *v;
register_t *retval;
{
struct mach_sys_syscall_thread_switch_args /* {
syscallarg(mach_port_name_t) thread_name;
syscallarg(int) option;
syscallarg(mach_msg_timeout_t) option_time;
} */ *uap = v;
int timeout;
struct mach_emuldata *med;
med = (struct mach_emuldata *)l->l_proc->p_emuldata;
timeout = SCARG(uap, option_time) * hz / 1000;
/*
* The day we will be able to find out the struct proc from
* the port number, try to use preempt() to call the right thread.
* [- but preempt() is for _involuntary_ context switches.]
*/
switch(SCARG(uap, option)) {
case MACH_SWITCH_OPTION_NONE:
yield();
break;
case MACH_SWITCH_OPTION_WAIT:
med->med_thpri = 1;
while (med->med_thpri != 0)
(void)tsleep(&med->med_thpri, PZERO|PCATCH,
"thread_switch", timeout);
break;
case MACH_SWITCH_OPTION_DEPRESS:
case MACH_SWITCH_OPTION_IDLE:
/* Use a callout to restore the priority after depression? */
med->med_thpri = l->l_priority;
l->l_priority = MAXPRI;
break;
default:
uprintf("mach_sys_syscall_thread_switch(): unknown option %d\n", SCARG(uap, option));
break;
}
return 0;
}
int
mach_thread_policy(args)
struct mach_trap_args *args;
{
mach_thread_policy_request_t *req = args->smsg;
mach_thread_policy_reply_t *rep = args->rmsg;
size_t *msglen = args->rsize;
rep->rep_msgh.msgh_bits =
MACH_MSGH_REPLY_LOCAL_BITS(MACH_MSG_TYPE_MOVE_SEND_ONCE);
rep->rep_msgh.msgh_size = sizeof(*rep) - sizeof(rep->rep_trailer);
rep->rep_msgh.msgh_local_port = req->req_msgh.msgh_local_port;
rep->rep_msgh.msgh_id = req->req_msgh.msgh_id + 100;
rep->rep_trailer.msgh_trailer_size = 8;
*msglen = sizeof(*rep);
return 0;
}
int
mach_thread_create_running(args)
struct mach_trap_args *args;
{
mach_thread_create_running_request_t *req = args->smsg;
mach_thread_create_running_reply_t *rep = args->rmsg;
size_t *msglen = args->rsize;
struct lwp *l = args->l;
struct proc *p = l->l_proc;
struct mach_create_thread_child_args mctc;
vaddr_t uaddr;
int flags;
int error;
int inmem;
int s;
/*
* Prepare the data we want to transmit to the child
*/
mctc.mctc_flavor = req->req_flavor;
mctc.mctc_oldlwp = l;
mctc.mctc_child_done = 0;
mctc.mctc_state = req->req_state;
inmem = uvm_uarea_alloc(&uaddr);
if (__predict_false(uaddr == 0))
return (ENOMEM);
flags = 0;
if ((error = newlwp(l, p, uaddr, inmem, flags, NULL, 0,
mach_create_thread_child, (void *)&mctc, &mctc.mctc_lwp)) != 0)
return mach_msg_error(args, error);
/*
* Make the child runnable
*/
SCHED_LOCK(s);
mctc.mctc_lwp->l_private = 0;
mctc.mctc_lwp->l_stat = LSRUN;
setrunqueue(mctc.mctc_lwp);
SCHED_UNLOCK(s);
simple_lock(&p->p_lwplock);
p->p_nrlwps++;
simple_unlock(&p->p_lwplock);
/*
* The child relies on some values in mctc, so we should not
* exit until it is finished with it. We catch signals so that
* the process can be killed with kill -9, but we loop to avoid
* spurious wakeups due to other signals.
*/
while(mctc.mctc_child_done == 0)
(void)tsleep(&mctc.mctc_child_done,
PZERO|PCATCH, "mach_thread", 0);
rep->rep_msgh.msgh_bits =
MACH_MSGH_REPLY_LOCAL_BITS(MACH_MSG_TYPE_MOVE_SEND_ONCE);
rep->rep_msgh.msgh_size = sizeof(*rep) - sizeof(rep->rep_trailer);
rep->rep_msgh.msgh_local_port = req->req_msgh.msgh_local_port;
rep->rep_msgh.msgh_id = req->req_msgh.msgh_id + 100;
/* XXX do something for rep->rep_child_act */
rep->rep_trailer.msgh_trailer_size = 8;
*msglen = sizeof(*rep);
return 0;
}