194 lines
6.1 KiB
C
194 lines
6.1 KiB
C
/* $NetBSD: mach_thread.c,v 1.18 2003/01/30 19:14:19 manu Exp $ */
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/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Emmanuel Dreyfus
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: mach_thread.c,v 1.18 2003/01/30 19:14:19 manu Exp $");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/signal.h>
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#include <sys/lock.h>
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#include <sys/queue.h>
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#include <sys/proc.h>
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#include <compat/mach/mach_types.h>
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#include <compat/mach/mach_message.h>
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#include <compat/mach/mach_exec.h>
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#include <compat/mach/mach_clock.h>
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#include <compat/mach/mach_port.h>
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#include <compat/mach/mach_thread.h>
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#include <compat/mach/mach_errno.h>
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#include <compat/mach/mach_syscallargs.h>
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int
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mach_sys_syscall_thread_switch(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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struct mach_sys_syscall_thread_switch_args /* {
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syscallarg(mach_port_name_t) thread_name;
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syscallarg(int) option;
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syscallarg(mach_msg_timeout_t) option_time;
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} */ *uap = v;
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int timeout;
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struct mach_emuldata *med;
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med = (struct mach_emuldata *)l->l_proc->p_emuldata;
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timeout = SCARG(uap, option_time) * hz / 1000;
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/*
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* The day we will be able to find out the struct proc from
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* the port number, try to use preempt() to call the right thread.
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* [- but preempt() is for _involuntary_ context switches.]
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*/
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switch(SCARG(uap, option)) {
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case MACH_SWITCH_OPTION_NONE:
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yield();
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break;
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case MACH_SWITCH_OPTION_WAIT:
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med->med_thpri = 1;
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while (med->med_thpri != 0)
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(void)tsleep(&med->med_thpri, PZERO|PCATCH,
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"thread_switch", timeout);
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break;
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case MACH_SWITCH_OPTION_DEPRESS:
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case MACH_SWITCH_OPTION_IDLE:
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/* Use a callout to restore the priority after depression? */
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med->med_thpri = l->l_priority;
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l->l_priority = MAXPRI;
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break;
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default:
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uprintf("mach_sys_syscall_thread_switch(): unknown option %d\n", SCARG(uap, option));
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break;
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}
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return 0;
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}
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int
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mach_thread_policy(args)
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struct mach_trap_args *args;
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{
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mach_thread_policy_request_t *req = args->smsg;
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mach_thread_policy_reply_t *rep = args->rmsg;
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size_t *msglen = args->rsize;
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rep->rep_msgh.msgh_bits =
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MACH_MSGH_REPLY_LOCAL_BITS(MACH_MSG_TYPE_MOVE_SEND_ONCE);
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rep->rep_msgh.msgh_size = sizeof(*rep) - sizeof(rep->rep_trailer);
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rep->rep_msgh.msgh_local_port = req->req_msgh.msgh_local_port;
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rep->rep_msgh.msgh_id = req->req_msgh.msgh_id + 100;
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rep->rep_trailer.msgh_trailer_size = 8;
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*msglen = sizeof(*rep);
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return 0;
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}
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int
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mach_thread_create_running(args)
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struct mach_trap_args *args;
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{
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mach_thread_create_running_request_t *req = args->smsg;
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mach_thread_create_running_reply_t *rep = args->rmsg;
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size_t *msglen = args->rsize;
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struct lwp *l = args->l;
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struct proc *p = l->l_proc;
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struct mach_create_thread_child_args mctc;
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vaddr_t uaddr;
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int flags;
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int error;
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int inmem;
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int s;
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/*
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* Prepare the data we want to transmit to the child
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*/
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mctc.mctc_flavor = req->req_flavor;
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mctc.mctc_oldlwp = l;
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mctc.mctc_child_done = 0;
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mctc.mctc_state = req->req_state;
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inmem = uvm_uarea_alloc(&uaddr);
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if (__predict_false(uaddr == 0))
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return (ENOMEM);
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flags = 0;
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if ((error = newlwp(l, p, uaddr, inmem, flags, NULL, 0,
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mach_create_thread_child, (void *)&mctc, &mctc.mctc_lwp)) != 0)
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return mach_msg_error(args, error);
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/*
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* Make the child runnable
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*/
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SCHED_LOCK(s);
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mctc.mctc_lwp->l_private = 0;
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mctc.mctc_lwp->l_stat = LSRUN;
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setrunqueue(mctc.mctc_lwp);
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SCHED_UNLOCK(s);
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simple_lock(&p->p_lwplock);
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p->p_nrlwps++;
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simple_unlock(&p->p_lwplock);
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/*
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* The child relies on some values in mctc, so we should not
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* exit until it is finished with it. We catch signals so that
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* the process can be killed with kill -9, but we loop to avoid
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* spurious wakeups due to other signals.
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*/
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while(mctc.mctc_child_done == 0)
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(void)tsleep(&mctc.mctc_child_done,
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PZERO|PCATCH, "mach_thread", 0);
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rep->rep_msgh.msgh_bits =
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MACH_MSGH_REPLY_LOCAL_BITS(MACH_MSG_TYPE_MOVE_SEND_ONCE);
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rep->rep_msgh.msgh_size = sizeof(*rep) - sizeof(rep->rep_trailer);
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rep->rep_msgh.msgh_local_port = req->req_msgh.msgh_local_port;
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rep->rep_msgh.msgh_id = req->req_msgh.msgh_id + 100;
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/* XXX do something for rep->rep_child_act */
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rep->rep_trailer.msgh_trailer_size = 8;
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*msglen = sizeof(*rep);
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return 0;
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}
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