/* $NetBSD: mach_thread.c,v 1.17 2003/01/26 19:32:04 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 __KERNEL_RCSID(0, "$NetBSD: mach_thread.c,v 1.17 2003/01/26 19:32:04 manu Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include 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_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; }