[apple/xnu.git] / bsd / uxkern / ux_exception.c

/*
 * Copyright (c) 2000-2004 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@
 */
/* 
 * Mach Operating System
 * Copyright (c) 1987 Carnegie-Mellon University
 * All rights reserved.  The CMU software License Agreement specifies
 * the terms and conditions for use and redistribution.
 */

/*
 *********************************************************************
 * HISTORY
 **********************************************************************
 */

#include <sys/param.h>

#include <mach/boolean.h>
#include <mach/exception.h>
#include <mach/kern_return.h>
#include <mach/message.h>
#include <mach/port.h>
#include <mach/mach_port.h>
#include <mach/mig_errors.h>
#include <mach/exc_server.h>
#include <kern/task.h>
#include <kern/thread.h>
#include <kern/sched_prim.h>
#include <kern/kalloc.h>

#include <sys/proc.h>
#include <sys/user.h>
#include <sys/systm.h>
#include <sys/ux_exception.h>

#include <vm/vm_protos.h>	/* get_task_ipcspace() */

/*
 * XXX Things that should be retrieved from Mach headers, but aren't
 */
struct ipc_object;
extern kern_return_t ipc_object_copyin(ipc_space_t space, mach_port_name_t name,
		mach_msg_type_name_t msgt_name, struct ipc_object **objectp);
extern mach_msg_return_t mach_msg_receive(mach_msg_header_t *msg,
		mach_msg_option_t option, mach_msg_size_t rcv_size,
		mach_port_name_t rcv_name, mach_msg_timeout_t rcv_timeout,
		void (*continuation)(mach_msg_return_t),
		mach_msg_size_t slist_size);
extern mach_msg_return_t mach_msg_send(mach_msg_header_t *msg,
		mach_msg_option_t option, mach_msg_size_t send_size,
		mach_msg_timeout_t send_timeout, mach_port_name_t notify);
extern thread_t convert_port_to_thread(ipc_port_t port);
extern void ipc_port_release(ipc_port_t);


/*
 *	Unix exception handler.
 */

static void	ux_exception(int exception, int code, int subcode,
				int *ux_signal, int *ux_code);

mach_port_name_t		ux_exception_port;
static task_t			ux_handler_self;

static
void
ux_handler(void)
{
    task_t		self = current_task();
    mach_port_name_t	exc_port_name;
    mach_port_name_t	exc_set_name;

    (void) thread_funnel_set(kernel_flock, TRUE);

    /* self->kernel_vm_space = TRUE; */
    ux_handler_self = self;


    /*
     *	Allocate a port set that we will receive on.
     */
    if (mach_port_allocate(get_task_ipcspace(ux_handler_self), MACH_PORT_RIGHT_PORT_SET,  &exc_set_name) != MACH_MSG_SUCCESS)
	    panic("ux_handler: port_set_allocate failed");

    /*
     *	Allocate an exception port and use object_copyin to
     *	translate it to the global name.  Put it into the set.
     */
    if (mach_port_allocate(get_task_ipcspace(ux_handler_self), MACH_PORT_RIGHT_RECEIVE, &exc_port_name) != MACH_MSG_SUCCESS)
	panic("ux_handler: port_allocate failed");
    if (mach_port_move_member(get_task_ipcspace(ux_handler_self),
    			exc_port_name,  exc_set_name) != MACH_MSG_SUCCESS)
	panic("ux_handler: port_set_add failed");

    if (ipc_object_copyin(get_task_ipcspace(self), exc_port_name,
			MACH_MSG_TYPE_MAKE_SEND, 
			(void *) &ux_exception_port) != MACH_MSG_SUCCESS)
		panic("ux_handler: object_copyin(ux_exception_port) failed");

    thread_wakeup(&ux_exception_port);

    /* Message handling loop. */

    for (;;) {
	struct rep_msg {
		mach_msg_header_t Head;
		NDR_record_t NDR;
		kern_return_t RetCode;
	} rep_msg;
	struct exc_msg {
		mach_msg_header_t Head;
		/* start of the kernel processed data */
		mach_msg_body_t msgh_body;
		mach_msg_port_descriptor_t thread;
		mach_msg_port_descriptor_t task;
		/* end of the kernel processed data */
		NDR_record_t NDR;
		exception_type_t exception;
		mach_msg_type_number_t codeCnt;
		exception_data_t code;
		/* some times RCV_TO_LARGE probs */
		char pad[512];
	} exc_msg;
	mach_port_name_t	reply_port;
	kern_return_t	 result;

	exc_msg.Head.msgh_local_port = (mach_port_t)exc_set_name;
	exc_msg.Head.msgh_size = sizeof (exc_msg);
#if 0
	result = mach_msg_receive(&exc_msg.Head);
#else
	result = mach_msg_receive(&exc_msg.Head, MACH_RCV_MSG,
			     sizeof (exc_msg), exc_set_name,
			     MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL,
			     0);
#endif
	if (result == MACH_MSG_SUCCESS) {
	    reply_port = (mach_port_name_t)exc_msg.Head.msgh_remote_port;

	    if (exc_server(&exc_msg.Head, &rep_msg.Head))
		(void) mach_msg_send(&rep_msg.Head, MACH_SEND_MSG,
			sizeof (rep_msg),MACH_MSG_TIMEOUT_NONE,MACH_PORT_NULL);

	    if (reply_port != MACH_PORT_NULL)
		(void) mach_port_deallocate(get_task_ipcspace(ux_handler_self), reply_port);
	}
	else if (result == MACH_RCV_TOO_LARGE)
		/* ignore oversized messages */;
	else
		panic("exception_handler");
    }
	thread_funnel_set(kernel_flock, FALSE);
}

void
ux_handler_init(void)
{
	ux_exception_port = MACH_PORT_NULL;
	(void) kernel_thread(kernel_task, ux_handler);
	if (ux_exception_port == MACH_PORT_NULL)  {
		assert_wait(&ux_exception_port, THREAD_UNINT);
		thread_block(THREAD_CONTINUE_NULL);
		}
}

kern_return_t
catch_exception_raise(
        __unused mach_port_t exception_port,
        mach_port_t thread,
        mach_port_t task,
        exception_type_t exception,
        exception_data_t code,
        __unused mach_msg_type_number_t codeCnt
)
{
	task_t		self = current_task();
	thread_t	th_act;
	ipc_port_t 	thread_port;
	kern_return_t	result = MACH_MSG_SUCCESS;
	int		ux_signal = 0;
	u_long		ucode = 0;
	struct uthread *ut;
	mach_port_name_t thread_name = (mach_port_name_t)thread; /* XXX */
	mach_port_name_t task_name = (mach_port_name_t)task;	/* XXX */

   /*
     *	Convert local thread name to global port.
     */
   if (MACH_PORT_VALID(thread_name) &&
       (ipc_object_copyin(get_task_ipcspace(self), thread_name,
		       MACH_MSG_TYPE_PORT_SEND,
		       (void *) &thread_port) == MACH_MSG_SUCCESS)) {
        if (IPC_PORT_VALID(thread_port)) {
	   th_act = convert_port_to_thread(thread_port);
	   ipc_port_release(thread_port);
	} else {
	   th_act = THREAD_NULL;
	}

	/*
	 *	Catch bogus ports
	 */
	if (th_act != THREAD_NULL) {
  
	    /*
	     *	Convert exception to unix signal and code.
	     */
		ut = get_bsdthread_info(th_act);
	    ux_exception(exception, code[0], code[1],
	    			&ux_signal, (int *)&ucode);

	    /*
	     *	Send signal.
	     */
	    if (ux_signal != 0) {
			ut->uu_exception = exception;
			//ut->uu_code = code[0]; // filled in by threadsignal
			ut->uu_subcode = code[1];			
			threadsignal(th_act, ux_signal, code[0]);
		}

	    thread_deallocate(th_act);
	}
	else
	    result = KERN_INVALID_ARGUMENT;
    }
    else
    	result = KERN_INVALID_ARGUMENT;

    /*
     *	Delete our send rights to the task and thread ports.
     */
    (void)mach_port_deallocate(get_task_ipcspace(ux_handler_self), task_name);
    (void)mach_port_deallocate(get_task_ipcspace(ux_handler_self), thread_name);

    return (result);
}

kern_return_t
catch_exception_raise_state(
        __unused mach_port_t exception_port,
        __unused exception_type_t exception,
        __unused const exception_data_t code,
        __unused mach_msg_type_number_t codeCnt,
        __unused int *flavor,
        __unused const thread_state_t old_state,
        __unused mach_msg_type_number_t old_stateCnt,
        __unused thread_state_t new_state,
        __unused mach_msg_type_number_t *new_stateCnt)
{
	return(KERN_INVALID_ARGUMENT);
}

kern_return_t
catch_exception_raise_state_identity(
        __unused mach_port_t exception_port,
        __unused mach_port_t thread,
        __unused mach_port_t task,
        __unused exception_type_t exception,
        __unused exception_data_t code,
        __unused mach_msg_type_number_t codeCnt,
        __unused int *flavor,
        __unused thread_state_t old_state,
        __unused mach_msg_type_number_t old_stateCnt,
        __unused thread_state_t new_state,
        __unused mach_msg_type_number_t *new_stateCnt)
{
	return(KERN_INVALID_ARGUMENT);
}

/*
 *	ux_exception translates a mach exception, code and subcode to
 *	a signal and u.u_code.  Calls machine_exception (machine dependent)
 *	to attempt translation first.
 */

static
void ux_exception(
    int			exception,
    int			code,
    int			subcode,
    int			*ux_signal,
    int			*ux_code
)
{
    /*
     *	Try machine-dependent translation first.
     */
    if (machine_exception(exception, code, subcode, ux_signal, ux_code))
	return;
	
    switch(exception) {

	case EXC_BAD_ACCESS:
		if (code == KERN_INVALID_ADDRESS)
			*ux_signal = SIGSEGV;
		else
			*ux_signal = SIGBUS;
		break;

	case EXC_BAD_INSTRUCTION:
	    *ux_signal = SIGILL;
	    break;

	case EXC_ARITHMETIC:
	    *ux_signal = SIGFPE;
	    break;

	case EXC_EMULATION:
	    *ux_signal = SIGEMT;
	    break;

	case EXC_SOFTWARE:
	    switch (code) {

	    case EXC_UNIX_BAD_SYSCALL:
		*ux_signal = SIGSYS;
		break;
	    case EXC_UNIX_BAD_PIPE:
		*ux_signal = SIGPIPE;
		break;
	    case EXC_UNIX_ABORT:
		*ux_signal = SIGABRT;
		break;
	    case EXC_SOFT_SIGNAL:
		*ux_signal = SIGKILL;
		break;
	    }
	    break;

	case EXC_BREAKPOINT:
	    *ux_signal = SIGTRAP;
	    break;
    }
}
Commit	Line	Data
1c79356b	1	/*
5d5c5d0d A	2	* Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
5d5c5d0d A	3	*
6601e61a	4	* @APPLE_LICENSE_HEADER_START@
1c79356b	5	*
6601e61a 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.
8f6c56a5	11	*
6601e61a A	12	* This Original Code and all software distributed under the License are
6601e61a A	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
6601e61a 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.
8f6c56a5	19	*
6601e61a	20	* @APPLE_LICENSE_HEADER_END@
1c79356b A	21	*/
	22	/*
	23	* Mach Operating System
	24	* Copyright (c) 1987 Carnegie-Mellon University
	25	* All rights reserved. The CMU software License Agreement specifies
	26	* the terms and conditions for use and redistribution.
	27	*/
	28
	29	/*
	30	*********************************************************************
	31	* HISTORY
	32	**********************************************************************
	33	*/
	34
	35	#include <sys/param.h>
	36
	37	#include <mach/boolean.h>
	38	#include <mach/exception.h>
	39	#include <mach/kern_return.h>
	40	#include <mach/message.h>
	41	#include <mach/port.h>
91447636	42	#include <mach/mach_port.h>
1c79356b	43	#include <mach/mig_errors.h>
91447636	44	#include <mach/exc_server.h>
1c79356b A	45	#include <kern/task.h>
1c79356b A	46	#include <kern/thread.h>
9bccf70c	47	#include <kern/sched_prim.h>
1c79356b A	48	#include <kern/kalloc.h>
	49
	50	#include <sys/proc.h>
	51	#include <sys/user.h>
	52	#include <sys/systm.h>
	53	#include <sys/ux_exception.h>
	54
91447636 A	55	#include <vm/vm_protos.h> /* get_task_ipcspace() */
	56
	57	/*
	58	* XXX Things that should be retrieved from Mach headers, but aren't
	59	*/
	60	struct ipc_object;
	61	extern kern_return_t ipc_object_copyin(ipc_space_t space, mach_port_name_t name,
	62	mach_msg_type_name_t msgt_name, struct ipc_object **objectp);
	63	extern mach_msg_return_t mach_msg_receive(mach_msg_header_t *msg,
	64	mach_msg_option_t option, mach_msg_size_t rcv_size,
	65	mach_port_name_t rcv_name, mach_msg_timeout_t rcv_timeout,
	66	void (*continuation)(mach_msg_return_t),
	67	mach_msg_size_t slist_size);
	68	extern mach_msg_return_t mach_msg_send(mach_msg_header_t *msg,
	69	mach_msg_option_t option, mach_msg_size_t send_size,
	70	mach_msg_timeout_t send_timeout, mach_port_name_t notify);
	71	extern thread_t convert_port_to_thread(ipc_port_t port);
	72	extern void ipc_port_release(ipc_port_t);
	73
	74
	75
	76
1c79356b A	77	/*
	78	* Unix exception handler.
	79	*/
	80
91447636 A	81	static void ux_exception(int exception, int code, int subcode,
91447636 A	82	int ux_signal, int ux_code);
1c79356b	83
1c79356b A	84	mach_port_name_t ux_exception_port;
	85	static task_t ux_handler_self;
	86
	87	static
	88	void
	89	ux_handler(void)
	90	{
	91	task_t self = current_task();
	92	mach_port_name_t exc_port_name;
	93	mach_port_name_t exc_set_name;
	94
	95	(void) thread_funnel_set(kernel_flock, TRUE);
	96
	97	/* self->kernel_vm_space = TRUE; */
	98	ux_handler_self = self;
	99
	100
	101	/*
	102	* Allocate a port set that we will receive on.
	103	*/
	104	if (mach_port_allocate(get_task_ipcspace(ux_handler_self), MACH_PORT_RIGHT_PORT_SET, &exc_set_name) != MACH_MSG_SUCCESS)
	105	panic("ux_handler: port_set_allocate failed");
	106
	107	/*
	108	* Allocate an exception port and use object_copyin to
	109	* translate it to the global name. Put it into the set.
	110	*/
	111	if (mach_port_allocate(get_task_ipcspace(ux_handler_self), MACH_PORT_RIGHT_RECEIVE, &exc_port_name) != MACH_MSG_SUCCESS)
	112	panic("ux_handler: port_allocate failed");
	113	if (mach_port_move_member(get_task_ipcspace(ux_handler_self),
	114	exc_port_name, exc_set_name) != MACH_MSG_SUCCESS)
	115	panic("ux_handler: port_set_add failed");
	116
	117	if (ipc_object_copyin(get_task_ipcspace(self), exc_port_name,
	118	MACH_MSG_TYPE_MAKE_SEND,
	119	(void *) &ux_exception_port) != MACH_MSG_SUCCESS)
	120	panic("ux_handler: object_copyin(ux_exception_port) failed");
	121
	122	thread_wakeup(&ux_exception_port);
	123
	124	/* Message handling loop. */
	125
	126	for (;;) {
	127	struct rep_msg {
	128	mach_msg_header_t Head;
	129	NDR_record_t NDR;
	130	kern_return_t RetCode;
	131	} rep_msg;
	132	struct exc_msg {
	133	mach_msg_header_t Head;
	134	/* start of the kernel processed data */
	135	mach_msg_body_t msgh_body;
	136	mach_msg_port_descriptor_t thread;
	137	mach_msg_port_descriptor_t task;
	138	/* end of the kernel processed data */
	139	NDR_record_t NDR;
	140	exception_type_t exception;
	141	mach_msg_type_number_t codeCnt;
	142	exception_data_t code;
	143	/* some times RCV_TO_LARGE probs */
	144	char pad[512];
	145	} exc_msg;
	146	mach_port_name_t reply_port;
	147	kern_return_t result;
148
149	exc_msg.Head.msgh_local_port = (mach_port_t)exc_set_name;
150	exc_msg.Head.msgh_size = sizeof (exc_msg);
151	#if 0
152	result = mach_msg_receive(&exc_msg.Head);
153	#else
154	result = mach_msg_receive(&exc_msg.Head, MACH_RCV_MSG,
155	sizeof (exc_msg), exc_set_name,
156	MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL,
157	0);
158	#endif
159	if (result == MACH_MSG_SUCCESS) {
160	reply_port = (mach_port_name_t)exc_msg.Head.msgh_remote_port;
161
162	if (exc_server(&exc_msg.Head, &rep_msg.Head))
163	(void) mach_msg_send(&rep_msg.Head, MACH_SEND_MSG,
164	sizeof (rep_msg),MACH_MSG_TIMEOUT_NONE,MACH_PORT_NULL);
165
166	if (reply_port != MACH_PORT_NULL)
167	(void) mach_port_deallocate(get_task_ipcspace(ux_handler_self), reply_port);
168	}
169	else if (result == MACH_RCV_TOO_LARGE)
170	/* ignore oversized messages */;
171	else
172	panic("exception_handler");
173	}
174	thread_funnel_set(kernel_flock, FALSE);
175	}
176
177	void
178	ux_handler_init(void)
179	{
1c79356b	180	ux_exception_port = MACH_PORT_NULL;
55e303ae	181	(void) kernel_thread(kernel_task, ux_handler);
1c79356b	182	if (ux_exception_port == MACH_PORT_NULL) {
1c79356b	183	assert_wait(&ux_exception_port, THREAD_UNINT);
9bccf70c	184	thread_block(THREAD_CONTINUE_NULL);
1c79356b	185	}
1c79356b A	186	}
	187
	188	kern_return_t
	189	catch_exception_raise(
91447636 A	190	__unused mach_port_t exception_port,
	191	mach_port_t thread,
	192	mach_port_t task,
	193	exception_type_t exception,
	194	exception_data_t code,
	195	__unused mach_msg_type_number_t codeCnt
1c79356b A	196	)
	197	{
	198	task_t self = current_task();
91447636	199	thread_t th_act;
1c79356b	200	ipc_port_t thread_port;
1c79356b	201	kern_return_t result = MACH_MSG_SUCCESS;
91447636	202	int ux_signal = 0;
1c79356b A	203	u_long ucode = 0;
1c79356b A	204	struct uthread *ut;
91447636 A	205	mach_port_name_t thread_name = (mach_port_name_t)thread; /* XXX */
91447636 A	206	mach_port_name_t task_name = (mach_port_name_t)task; /* XXX */
1c79356b A	207
	208	/*
	209	* Convert local thread name to global port.
	210	*/
	211	if (MACH_PORT_VALID(thread_name) &&
	212	(ipc_object_copyin(get_task_ipcspace(self), thread_name,
	213	MACH_MSG_TYPE_PORT_SEND,
	214	(void *) &thread_port) == MACH_MSG_SUCCESS)) {
9bccf70c	215	if (IPC_PORT_VALID(thread_port)) {
91447636	216	th_act = convert_port_to_thread(thread_port);
1c79356b A	217	ipc_port_release(thread_port);
1c79356b A	218	} else {
91447636	219	th_act = THREAD_NULL;
1c79356b A	220	}
	221
	222	/*
	223	* Catch bogus ports
	224	*/
91447636	225	if (th_act != THREAD_NULL) {
1c79356b A	226
	227	/*
	228	* Convert exception to unix signal and code.
	229	*/
	230	ut = get_bsdthread_info(th_act);
	231	ux_exception(exception, code[0], code[1],
91447636	232	&ux_signal, (int *)&ucode);
1c79356b A	233
	234	/*
	235	* Send signal.
	236	*/
0c530ab8 A	237	if (ux_signal != 0) {
	238	ut->uu_exception = exception;
	239	//ut->uu_code = code[0]; // filled in by threadsignal
	240	ut->uu_subcode = code[1];
	241	threadsignal(th_act, ux_signal, code[0]);
	242	}
1c79356b	243
91447636	244	thread_deallocate(th_act);
1c79356b A	245	}
	246	else
	247	result = KERN_INVALID_ARGUMENT;
	248	}
	249	else
	250	result = KERN_INVALID_ARGUMENT;
	251
	252	/*
	253	* Delete our send rights to the task and thread ports.
	254	*/
	255	(void)mach_port_deallocate(get_task_ipcspace(ux_handler_self), task_name);
91447636	256	(void)mach_port_deallocate(get_task_ipcspace(ux_handler_self), thread_name);
1c79356b A	257
	258	return (result);
	259	}
91447636	260
1c79356b	261	kern_return_t
91447636 A	262	catch_exception_raise_state(
	263	__unused mach_port_t exception_port,
	264	__unused exception_type_t exception,
	265	__unused const exception_data_t code,
	266	__unused mach_msg_type_number_t codeCnt,
	267	__unused int *flavor,
	268	__unused const thread_state_t old_state,
	269	__unused mach_msg_type_number_t old_stateCnt,
	270	__unused thread_state_t new_state,
	271	__unused mach_msg_type_number_t *new_stateCnt)
1c79356b A	272	{
	273	return(KERN_INVALID_ARGUMENT);
	274	}
91447636	275
1c79356b	276	kern_return_t
91447636 A	277	catch_exception_raise_state_identity(
	278	__unused mach_port_t exception_port,
	279	__unused mach_port_t thread,
	280	__unused mach_port_t task,
	281	__unused exception_type_t exception,
	282	__unused exception_data_t code,
	283	__unused mach_msg_type_number_t codeCnt,
	284	__unused int *flavor,
	285	__unused thread_state_t old_state,
	286	__unused mach_msg_type_number_t old_stateCnt,
	287	__unused thread_state_t new_state,
	288	__unused mach_msg_type_number_t *new_stateCnt)
1c79356b A	289	{
	290	return(KERN_INVALID_ARGUMENT);
	291	}
	292
1c79356b A	293	/*
	294	* ux_exception translates a mach exception, code and subcode to
	295	* a signal and u.u_code. Calls machine_exception (machine dependent)
	296	* to attempt translation first.
	297	*/
	298
	299	static
	300	void ux_exception(
	301	int exception,
	302	int code,
	303	int subcode,
	304	int *ux_signal,
	305	int *ux_code
	306	)
	307	{
	308	/*
	309	* Try machine-dependent translation first.
	310	*/
	311	if (machine_exception(exception, code, subcode, ux_signal, ux_code))
	312	return;
	313
	314	switch(exception) {
	315
	316	case EXC_BAD_ACCESS:
	317	if (code == KERN_INVALID_ADDRESS)
	318	*ux_signal = SIGSEGV;
	319	else
	320	*ux_signal = SIGBUS;
	321	break;
	322
	323	case EXC_BAD_INSTRUCTION:
	324	*ux_signal = SIGILL;
	325	break;
	326
	327	case EXC_ARITHMETIC:
	328	*ux_signal = SIGFPE;
	329	break;
	330
	331	case EXC_EMULATION:
	332	*ux_signal = SIGEMT;
	333	break;
	334
	335	case EXC_SOFTWARE:
	336	switch (code) {
	337
	338	case EXC_UNIX_BAD_SYSCALL:
	339	*ux_signal = SIGSYS;
	340	break;
	341	case EXC_UNIX_BAD_PIPE:
	342	*ux_signal = SIGPIPE;
	343	break;
	344	case EXC_UNIX_ABORT:
	345	*ux_signal = SIGABRT;
	346	break;
9bccf70c A	347	case EXC_SOFT_SIGNAL:
	348	*ux_signal = SIGKILL;
	349	break;
1c79356b A	350	}
	351	break;
	352
	353	case EXC_BREAKPOINT:
	354	*ux_signal = SIGTRAP;
	355	break;
	356	}
	357	}