[apple/xnu.git] / bsd / kern / mach_process.c

/*
 * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*-
 * Copyright (c) 1982, 1986, 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 * (c) UNIX System Laboratories, Inc.
 * All or some portions of this file are derived from material licensed
 * to the University of California by American Telephone and Telegraph
 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, Inc.
 *
 * 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 University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
 *
 *	from: @(#)sys_process.c	8.1 (Berkeley) 6/10/93
 */

#include <machine/reg.h>
#include <machine/psl.h>

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/errno.h>
#include <sys/ptrace.h>
#include <sys/uio.h>
#include <sys/user.h>
#include <sys/sysctl.h>
#include <sys/wait.h>

#include <sys/mount.h>

#include <kern/task.h>
#include <kern/thread.h>
#include <mach/machine/thread_status.h>

/* Macros to clear/set/test flags. */
#define	SET(t, f)	(t) |= (f)
#define	CLR(t, f)	(t) &= ~(f)
#define	ISSET(t, f)	((t) & (f))

void psignal_lock __P((struct proc *, int, int));
int isinferior __P((struct proc *, struct proc *));

/*
 * sys-trace system call.
 */
struct ptrace_args {
	int	req;
	pid_t pid;
	caddr_t	addr;
	int	data;
};

int
ptrace(p, uap, retval)
	struct proc *p;
	struct ptrace_args *uap;
	register_t *retval;
{
	struct proc *t = current_proc();	/* target process */
	vm_offset_t	start_addr, end_addr,
			kern_addr, offset;
	vm_size_t	size;
	task_t		task;
	thread_t	thread;
	thread_act_t	th_act;
	struct uthread 	*ut;
	int		*locr0;
	int error = 0;
#if defined(ppc)
	struct ppc_thread_state statep;
#elif	defined(i386)
	struct i386_saved_state statep;
#else
#error architecture not supported
#endif
	unsigned long state_count;
	int tr_sigexc = 0;


        if (uap->req == PT_DENY_ATTACH) {
	        if (ISSET(p->p_flag, P_TRACED)) {
				exit1(p, W_EXITCODE(ENOTSUP, 0), retval);
				/* drop funnel before we return */
				thread_funnel_set(kernel_flock, FALSE);
				thread_exception_return();
				/* NOTREACHED */
			}
		SET(p->p_flag, P_NOATTACH);

		return(0);
	}

	if (uap->req == PT_FORCEQUOTA) {
		if (is_suser()) {
			SET(t->p_flag, P_FORCEQUOTA);
			return (0);
		} else
			return (EPERM);
	}

	/*
	 *	Intercept and deal with "please trace me" request.
	 */	 
	if (uap->req == PT_TRACE_ME) {
		SET(p->p_flag, P_TRACED);
		/* Non-attached case, our tracer is our parent. */
		t->p_oppid = t->p_pptr->p_pid;
		return(0);
	}
	if (uap->req == PT_SIGEXC) {
		if (ISSET(p->p_flag, P_TRACED)) {
			SET(p->p_flag, P_SIGEXC);
			return(0);
		} else
			return(EINVAL);
	}

	/*
	 *	Locate victim, and make sure it is traceable.
	 */
	if ((t = pfind(uap->pid)) == NULL)
			return (ESRCH);


	/* We do not want ptrace to do anything with kernel, init 
	 * and mach_init
	 */
	if (uap->pid <=2 )
		return (EPERM);

	task = t->task;
	if (uap->req == PT_ATTACHEXC) {
		uap->req = PT_ATTACH;
		tr_sigexc = 1;
	}
	if (uap->req == PT_ATTACH) {

		/*
		 * You can't attach to a process if:
		 *	(1) it's the process that's doing the attaching,
		 */
		if (t->p_pid == p->p_pid)
			return (EINVAL);

		/*
		 *	(2) it's already being traced, or
		 */
		if (ISSET(t->p_flag, P_TRACED))
			return (EBUSY);

		/*
		 *	(3) it's not owned by you, or is set-id on exec
		 *	    (unless you're root).
		 */
		if ((t->p_cred->p_ruid != p->p_cred->p_ruid ||
			ISSET(t->p_flag, P_SUGID)) &&
		    (error = suser(p->p_ucred, &p->p_acflag)) != 0)
			return (error);

		if ((p->p_flag & P_TRACED) && isinferior(p, t))
			return(EPERM);

		if (ISSET(t->p_flag, P_NOATTACH)) {
			psignal(p, SIGSEGV);
			return (EBUSY);
		}
		SET(t->p_flag, P_TRACED);
		if (tr_sigexc) 
			SET(t->p_flag, P_SIGEXC);

		t->p_oppid = t->p_pptr->p_pid;
		if (t->p_pptr != p)
			proc_reparent(t, p);

		if (get_task_userstop(task) == 0 ) {
			t->p_xstat = 0;
			psignal(t, SIGSTOP);
		} else {
			t->p_xstat = SIGSTOP; 
			task_resume(task);       
		}
		return(0);
	}

	/*
	 * You can't do what you want to the process if:
	 *	(1) It's not being traced at all,
	 */
	if (!ISSET(t->p_flag, P_TRACED))
		return (EPERM);

	/*
	 *	(2) it's not being traced by _you_, or
	 */
	if (t->p_pptr != p)
		return (EBUSY);

	/*
	 *	(3) it's not currently stopped.
	 */
	if (t->p_stat != SSTOP)
		return (EBUSY);

	/*
	 *	Mach version of ptrace executes request directly here,
	 *	thus simplifying the interaction of ptrace and signals.
	 */
	switch (uap->req) {

	case PT_DETACH:
		if (t->p_oppid != t->p_pptr->p_pid) {
			struct proc *pp;

			pp = pfind(t->p_oppid);
			proc_reparent(t, pp ? pp : initproc);
		}

		t->p_oppid = 0;
		CLR(t->p_flag, P_TRACED);
		CLR(t->p_flag, P_SIGEXC);
		goto resume;
		
	case PT_KILL:
		/*
		 *	Tell child process to kill itself after it
		 *	is resumed by adding NSIG to p_cursig. [see issig]
		 */
		psignal_lock(t, SIGKILL, 0);
		goto resume;

	case PT_STEP:			/* single step the child */
	case PT_CONTINUE:		/* continue the child */
		th_act = (thread_act_t)get_firstthread(task);
		if (th_act == THR_ACT_NULL)
			goto errorLabel;
		ut = (uthread_t)get_bsdthread_info(th_act);
		locr0 = ut->uu_ar0;
#if defined(i386)
		state_count = i386_NEW_THREAD_STATE_COUNT;
		if (thread_getstatus(th_act, i386_NEW_THREAD_STATE, &statep, &state_count)  != KERN_SUCCESS) {
			goto errorLabel;
		}	
#elif defined(ppc)
		state_count = PPC_THREAD_STATE_COUNT;
		if (thread_getstatus(th_act, PPC_THREAD_STATE, &statep, &state_count)  != KERN_SUCCESS) {
			goto errorLabel;
		}	
#else
#error architecture not supported
#endif
		if ((int)uap->addr != 1) {
#if	defined(i386)
			locr0[PC] = (int)uap->addr;
#elif	defined(ppc)
#define ALIGNED(addr,size)	(((unsigned)(addr)&((size)-1))==0)
		if (!ALIGNED((int)uap->addr, sizeof(int)))
			return (ERESTART);

		statep.srr0 = (int)uap->addr;
		state_count = PPC_THREAD_STATE_COUNT;
		if (thread_setstatus(th_act, PPC_THREAD_STATE, &statep, &state_count)  != KERN_SUCCESS) {
			goto errorLabel;
		}	
#undef 	ALIGNED
#else
#error architecture not implemented!
#endif
		} /* (int)uap->addr != 1 */

		if ((unsigned)uap->data < 0 || (unsigned)uap->data >= NSIG)
			goto errorLabel;

		if (uap->data != 0) {
			psignal_lock(t, uap->data, 0);
                }
#if defined(ppc)
		state_count = PPC_THREAD_STATE_COUNT;
		if (thread_getstatus(th_act, PPC_THREAD_STATE, &statep, &state_count)  != KERN_SUCCESS) {
			goto errorLabel;
		}	
#endif

#define MSR_SE_BIT	21

		if (uap->req == PT_STEP) {
#if	defined(i386)
			locr0[PS] |= PSL_T;
#elif 	defined(ppc)
			statep.srr1 |= MASK(MSR_SE);
#else
#error architecture not implemented!
#endif
		} /* uap->req == PT_STEP */
		else {  /* PT_CONTINUE - clear trace bit if set */
#if defined(i386)
			locr0[PS] &= ~PSL_T;
#elif defined(ppc)
			statep.srr1 &= ~MASK(MSR_SE);
#endif
		}
#if defined (ppc)
		state_count = PPC_THREAD_STATE_COUNT;
		if (thread_setstatus(th_act, PPC_THREAD_STATE, &statep, &state_count)  != KERN_SUCCESS) {
			goto errorLabel;
		}	
#endif
	resume:
		t->p_xstat = uap->data;
		t->p_stat = SRUN;
		if (t->sigwait) {
			wakeup((caddr_t)&(t->sigwait));
			task_release(task);
		}
		break;
		
	case PT_THUPDATE:  {
		thread_act_t target_act;

		if ((unsigned)uap->data >= NSIG)
			goto errorLabel;
		th_act = (thread_act_t)port_name_to_act((void *)uap->addr);
		if (th_act == THR_ACT_NULL)
			return (ESRCH);
		ut = (uthread_t)get_bsdthread_info(th_act);
		if (uap->data)
			ut->uu_siglist |= sigmask(uap->data);
		t->p_xstat = uap->data;
		t->p_stat = SRUN;
		act_deallocate(th_act);
		return(0);
		}
		break;
errorLabel:
	default:
		return(EINVAL);
	}

	return(0);
}
Commit	Line	Data
1c79356b	1	/*
9bccf70c	2	* Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
1c79356b A	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
de355530 A	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
1c79356b	11	*
de355530 A	12	* This Original Code and all software distributed under the License are
de355530 A	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
de355530 A	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
1c79356b A	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
	23	/*-
	24	* Copyright (c) 1982, 1986, 1989, 1993
	25	* The Regents of the University of California. All rights reserved.
	26	* (c) UNIX System Laboratories, Inc.
	27	* All or some portions of this file are derived from material licensed
	28	* to the University of California by American Telephone and Telegraph
	29	* Co. or Unix System Laboratories, Inc. and are reproduced herein with
	30	* the permission of UNIX System Laboratories, Inc.
	31	*
	32	* Redistribution and use in source and binary forms, with or without
	33	* modification, are permitted provided that the following conditions
	34	* are met:
	35	* 1. Redistributions of source code must retain the above copyright
	36	* notice, this list of conditions and the following disclaimer.
	37	* 2. Redistributions in binary form must reproduce the above copyright
	38	* notice, this list of conditions and the following disclaimer in the
	39	* documentation and/or other materials provided with the distribution.
	40	* 3. All advertising materials mentioning features or use of this software
	41	* must display the following acknowledgement:
	42	* This product includes software developed by the University of
	43	* California, Berkeley and its contributors.
	44	* 4. Neither the name of the University nor the names of its contributors
	45	* may be used to endorse or promote products derived from this software
	46	* without specific prior written permission.
	47	*
	48	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	49	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	50	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	51	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	52	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	53	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	54	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	55	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	56	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	57	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	58	* SUCH DAMAGE.
	59	*
	60	* from: @(#)sys_process.c 8.1 (Berkeley) 6/10/93
	61	*/
1c79356b A	62
	63	#include <machine/reg.h>
	64	#include <machine/psl.h>
	65
	66	#include <sys/param.h>
	67	#include <sys/systm.h>
	68	#include <sys/proc.h>
	69	#include <sys/errno.h>
	70	#include <sys/ptrace.h>
	71	#include <sys/uio.h>
	72	#include <sys/user.h>
	73	#include <sys/sysctl.h>
0b4e3aa0	74	#include <sys/wait.h>
1c79356b A	75
	76	#include <sys/mount.h>
	77
	78	#include <kern/task.h>
	79	#include <kern/thread.h>
	80	#include <mach/machine/thread_status.h>
	81
	82	/* Macros to clear/set/test flags. */
	83	#define SET(t, f) (t) \|= (f)
	84	#define CLR(t, f) (t) &= ~(f)
	85	#define ISSET(t, f) ((t) & (f))
	86
9bccf70c A	87	void psignal_lock __P((struct proc *, int, int));
	88	int isinferior __P((struct proc , struct proc ));
	89
1c79356b A	90	/*
	91	* sys-trace system call.
	92	*/
	93	struct ptrace_args {
	94	int req;
	95	pid_t pid;
	96	caddr_t addr;
	97	int data;
	98	};
9bccf70c	99
1c79356b A	100	int
	101	ptrace(p, uap, retval)
	102	struct proc *p;
	103	struct ptrace_args *uap;
	104	register_t *retval;
	105	{
	106	struct proc t = current_proc(); / target process */
	107	vm_offset_t start_addr, end_addr,
	108	kern_addr, offset;
	109	vm_size_t size;
1c79356b A	110	task_t task;
	111	thread_t thread;
	112	thread_act_t th_act;
	113	struct uthread *ut;
	114	int *locr0;
	115	int error = 0;
	116	#if defined(ppc)
de355530	117	struct ppc_thread_state statep;
1c79356b A	118	#elif defined(i386)
	119	struct i386_saved_state statep;
	120	#else
	121	#error architecture not supported
	122	#endif
	123	unsigned long state_count;
9bccf70c	124	int tr_sigexc = 0;
1c79356b A	125
1c79356b A	126
0b4e3aa0 A	127	if (uap->req == PT_DENY_ATTACH) {
	128	if (ISSET(p->p_flag, P_TRACED)) {
	129	exit1(p, W_EXITCODE(ENOTSUP, 0), retval);
9bccf70c	130	/* drop funnel before we return */
0b4e3aa0 A	131	thread_funnel_set(kernel_flock, FALSE);
	132	thread_exception_return();
	133	/* NOTREACHED */
	134	}
	135	SET(p->p_flag, P_NOATTACH);
	136
	137	return(0);
	138	}
	139
9bccf70c A	140	if (uap->req == PT_FORCEQUOTA) {
	141	if (is_suser()) {
	142	SET(t->p_flag, P_FORCEQUOTA);
	143	return (0);
	144	} else
	145	return (EPERM);
	146	}
	147
1c79356b A	148	/*
	149	* Intercept and deal with "please trace me" request.
	150	*/
	151	if (uap->req == PT_TRACE_ME) {
	152	SET(p->p_flag, P_TRACED);
	153	/* Non-attached case, our tracer is our parent. */
	154	t->p_oppid = t->p_pptr->p_pid;
	155	return(0);
	156	}
9bccf70c A	157	if (uap->req == PT_SIGEXC) {
	158	if (ISSET(p->p_flag, P_TRACED)) {
	159	SET(p->p_flag, P_SIGEXC);
	160	return(0);
	161	} else
	162	return(EINVAL);
	163	}
1c79356b A	164
	165	/*
	166	* Locate victim, and make sure it is traceable.
	167	*/
	168	if ((t = pfind(uap->pid)) == NULL)
	169	return (ESRCH);
	170
	171
	172	/* We do not want ptrace to do anything with kernel, init
	173	* and mach_init
	174	*/
	175	if (uap->pid <=2 )
	176	return (EPERM);
	177
	178	task = t->task;
9bccf70c A	179	if (uap->req == PT_ATTACHEXC) {
	180	uap->req = PT_ATTACH;
	181	tr_sigexc = 1;
	182	}
1c79356b A	183	if (uap->req == PT_ATTACH) {
	184
	185	/*
	186	* You can't attach to a process if:
	187	* (1) it's the process that's doing the attaching,
	188	*/
	189	if (t->p_pid == p->p_pid)
	190	return (EINVAL);
	191
	192	/*
	193	* (2) it's already being traced, or
	194	*/
	195	if (ISSET(t->p_flag, P_TRACED))
	196	return (EBUSY);
	197
	198	/*
	199	* (3) it's not owned by you, or is set-id on exec
	200	* (unless you're root).
	201	*/
	202	if ((t->p_cred->p_ruid != p->p_cred->p_ruid \|\|
	203	ISSET(t->p_flag, P_SUGID)) &&
	204	(error = suser(p->p_ucred, &p->p_acflag)) != 0)
	205	return (error);
	206
9bccf70c A	207	if ((p->p_flag & P_TRACED) && isinferior(p, t))
	208	return(EPERM);
	209
0b4e3aa0 A	210	if (ISSET(t->p_flag, P_NOATTACH)) {
	211	psignal(p, SIGSEGV);
	212	return (EBUSY);
	213	}
1c79356b	214	SET(t->p_flag, P_TRACED);
9bccf70c A	215	if (tr_sigexc)
	216	SET(t->p_flag, P_SIGEXC);
	217
1c79356b A	218	t->p_oppid = t->p_pptr->p_pid;
	219	if (t->p_pptr != p)
	220	proc_reparent(t, p);
	221
	222	if (get_task_userstop(task) == 0 ) {
	223	t->p_xstat = 0;
	224	psignal(t, SIGSTOP);
	225	} else {
	226	t->p_xstat = SIGSTOP;
	227	task_resume(task);
	228	}
	229	return(0);
	230	}
	231
	232	/*
	233	* You can't do what you want to the process if:
	234	* (1) It's not being traced at all,
	235	*/
	236	if (!ISSET(t->p_flag, P_TRACED))
	237	return (EPERM);
	238
	239	/*
	240	* (2) it's not being traced by _you_, or
	241	*/
	242	if (t->p_pptr != p)
	243	return (EBUSY);
	244
	245	/*
	246	* (3) it's not currently stopped.
	247	*/
	248	if (t->p_stat != SSTOP)
	249	return (EBUSY);
	250
	251	/*
	252	* Mach version of ptrace executes request directly here,
	253	* thus simplifying the interaction of ptrace and signals.
	254	*/
	255	switch (uap->req) {
	256
	257	case PT_DETACH:
	258	if (t->p_oppid != t->p_pptr->p_pid) {
	259	struct proc *pp;
	260
	261	pp = pfind(t->p_oppid);
	262	proc_reparent(t, pp ? pp : initproc);
	263	}
	264
	265	t->p_oppid = 0;
	266	CLR(t->p_flag, P_TRACED);
9bccf70c	267	CLR(t->p_flag, P_SIGEXC);
1c79356b A	268	goto resume;
	269
	270	case PT_KILL:
	271	/*
	272	* Tell child process to kill itself after it
	273	* is resumed by adding NSIG to p_cursig. [see issig]
	274	*/
9bccf70c	275	psignal_lock(t, SIGKILL, 0);
1c79356b A	276	goto resume;
	277
	278	case PT_STEP: /* single step the child */
	279	case PT_CONTINUE: /* continue the child */
	280	th_act = (thread_act_t)get_firstthread(task);
9bccf70c	281	if (th_act == THR_ACT_NULL)
1c79356b A	282	goto errorLabel;
	283	ut = (uthread_t)get_bsdthread_info(th_act);
	284	locr0 = ut->uu_ar0;
	285	#if defined(i386)
	286	state_count = i386_NEW_THREAD_STATE_COUNT;
9bccf70c	287	if (thread_getstatus(th_act, i386_NEW_THREAD_STATE, &statep, &state_count) != KERN_SUCCESS) {
1c79356b A	288	goto errorLabel;
	289	}
	290	#elif defined(ppc)
de355530 A	291	state_count = PPC_THREAD_STATE_COUNT;
de355530 A	292	if (thread_getstatus(th_act, PPC_THREAD_STATE, &statep, &state_count) != KERN_SUCCESS) {
1c79356b A	293	goto errorLabel;
	294	}
	295	#else
	296	#error architecture not supported
	297	#endif
	298	if ((int)uap->addr != 1) {
	299	#if defined(i386)
	300	locr0[PC] = (int)uap->addr;
	301	#elif defined(ppc)
	302	#define ALIGNED(addr,size) (((unsigned)(addr)&((size)-1))==0)
	303	if (!ALIGNED((int)uap->addr, sizeof(int)))
	304	return (ERESTART);
	305
de355530 A	306	statep.srr0 = (int)uap->addr;
	307	state_count = PPC_THREAD_STATE_COUNT;
	308	if (thread_setstatus(th_act, PPC_THREAD_STATE, &statep, &state_count) != KERN_SUCCESS) {
1c79356b A	309	goto errorLabel;
	310	}
	311	#undef ALIGNED
	312	#else
	313	#error architecture not implemented!
	314	#endif
	315	} /* (int)uap->addr != 1 */
	316
	317	if ((unsigned)uap->data < 0 \|\| (unsigned)uap->data >= NSIG)
	318	goto errorLabel;
	319
	320	if (uap->data != 0) {
9bccf70c	321	psignal_lock(t, uap->data, 0);
1c79356b A	322	}
1c79356b A	323	#if defined(ppc)
de355530 A	324	state_count = PPC_THREAD_STATE_COUNT;
de355530 A	325	if (thread_getstatus(th_act, PPC_THREAD_STATE, &statep, &state_count) != KERN_SUCCESS) {
1c79356b A	326	goto errorLabel;
	327	}
	328	#endif
	329
	330	#define MSR_SE_BIT 21
	331
	332	if (uap->req == PT_STEP) {
	333	#if defined(i386)
	334	locr0[PS] \|= PSL_T;
	335	#elif defined(ppc)
	336	statep.srr1 \|= MASK(MSR_SE);
	337	#else
	338	#error architecture not implemented!
	339	#endif
	340	} /* uap->req == PT_STEP */
	341	else { /* PT_CONTINUE - clear trace bit if set */
	342	#if defined(i386)
	343	locr0[PS] &= ~PSL_T;
	344	#elif defined(ppc)
	345	statep.srr1 &= ~MASK(MSR_SE);
	346	#endif
	347	}
	348	#if defined (ppc)
de355530 A	349	state_count = PPC_THREAD_STATE_COUNT;
de355530 A	350	if (thread_setstatus(th_act, PPC_THREAD_STATE, &statep, &state_count) != KERN_SUCCESS) {
1c79356b A	351	goto errorLabel;
	352	}
	353	#endif
	354	resume:
	355	t->p_xstat = uap->data;
	356	t->p_stat = SRUN;
	357	if (t->sigwait) {
	358	wakeup((caddr_t)&(t->sigwait));
de355530	359	task_release(task);
1c79356b A	360	}
	361	break;
	362
9bccf70c A	363	case PT_THUPDATE: {
	364	thread_act_t target_act;
	365
	366	if ((unsigned)uap->data >= NSIG)
	367	goto errorLabel;
	368	th_act = (thread_act_t)port_name_to_act((void *)uap->addr);
	369	if (th_act == THR_ACT_NULL)
	370	return (ESRCH);
	371	ut = (uthread_t)get_bsdthread_info(th_act);
	372	if (uap->data)
	373	ut->uu_siglist \|= sigmask(uap->data);
	374	t->p_xstat = uap->data;
	375	t->p_stat = SRUN;
	376	act_deallocate(th_act);
	377	return(0);
	378	}
	379	break;
	380	errorLabel:
1c79356b	381	default:
1c79356b A	382	return(EINVAL);
1c79356b A	383	}
9bccf70c	384
1c79356b A	385	return(0);
	386	}
	387