[apple/xnu.git] / osfmk / kdp / ml / i386 / kdp_machdep.c

/*
 * Copyright (c) 2000 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@
 */
 
#include <mach/mach_types.h>
#include <mach/machine.h>
#include <mach/exception_types.h>
#include <i386/trap.h>
#include <i386/mp.h>
#include <kdp/kdp_internal.h>

#define KDP_TEST_HARNESS 0
#if KDP_TEST_HARNESS
#define dprintf(x) printf x
#else
#define dprintf(x)
#endif

void print_saved_state(void *);
void kdp_call(void);
void kdp_i386_trap(unsigned int, struct i386_saved_state *, kern_return_t, vm_offset_t);
int kdp_getc(void);

void
kdp_exception(
    unsigned char	*pkt,
    int	*len,
    unsigned short	*remote_port,
    unsigned int	exception,
    unsigned int	code,
    unsigned int	subcode
)
{
    kdp_exception_t	*rq = (kdp_exception_t *)pkt;

    rq->hdr.request = KDP_EXCEPTION;
    rq->hdr.is_reply = 0;
    rq->hdr.seq = kdp.exception_seq;
    rq->hdr.key = 0;
    rq->hdr.len = sizeof (*rq);
    
    rq->n_exc_info = 1;
    rq->exc_info[0].cpu = 0;
    rq->exc_info[0].exception = exception;
    rq->exc_info[0].code = code;
    rq->exc_info[0].subcode = subcode;
    
    rq->hdr.len += rq->n_exc_info * sizeof (kdp_exc_info_t);
    
    bcopy((char *)rq, (char *)pkt, rq->hdr.len);

    kdp.exception_ack_needed = TRUE;
    
    *remote_port = kdp.exception_port;
    *len = rq->hdr.len;
}

boolean_t
kdp_exception_ack(
    unsigned char	*pkt,
    int			len
)
{
    kdp_exception_ack_t	*rq = (kdp_exception_ack_t *)pkt;

    if (len < sizeof (*rq))
	return(FALSE);
	
    if (!rq->hdr.is_reply || rq->hdr.request != KDP_EXCEPTION)
    	return(FALSE);
	
    dprintf(("kdp_exception_ack seq %x %x\n", rq->hdr.seq, kdp.exception_seq));
	
    if (rq->hdr.seq == kdp.exception_seq) {
	kdp.exception_ack_needed = FALSE;
	kdp.exception_seq++;
    }
    return(TRUE);
}

void
kdp_getstate(
    i386_thread_state_t		*state
)
{
    struct i386_saved_state	*saved_state;
    
    saved_state = (struct i386_saved_state *)kdp.saved_state;
    
    *state = (i386_thread_state_t) { 0 };	
    state->eax = saved_state->eax;
    state->ebx = saved_state->ebx;
    state->ecx = saved_state->ecx;
    state->edx = saved_state->edx;
    state->edi = saved_state->edi;
    state->esi = saved_state->esi;
    state->ebp = saved_state->ebp;

    if ((saved_state->cs & 0x3) == 0){	/* Kernel State */
    	state->esp = (unsigned int) &saved_state->uesp;
        state->ss = KERNEL_DS;
    } else {
    	state->esp = saved_state->uesp;
    	state->ss = saved_state->ss;
    }

    state->eflags = saved_state->efl;
    state->eip = saved_state->eip;
    state->cs = saved_state->cs;
    state->ds = saved_state->ds;
    state->es = saved_state->es;
    state->fs = saved_state->fs;
    state->gs = saved_state->gs;
}


void
kdp_setstate(
    i386_thread_state_t		*state
)
{
    struct i386_saved_state	*saved_state;
    
    saved_state = (struct i386_saved_state *)kdp.saved_state;

    saved_state->eax = state->eax;
    saved_state->ebx = state->ebx;
    saved_state->ecx = state->ecx;
    saved_state->edx = state->edx;
    saved_state->edi = state->edi;
    saved_state->esi = state->esi;
    saved_state->ebp = state->ebp;
    saved_state->efl = state->eflags;
#if	0
    saved_state->frame.eflags &= ~( EFL_VM | EFL_NT | EFL_IOPL | EFL_CLR );
    saved_state->frame.eflags |=  ( EFL_IF | EFL_SET );
#endif
    saved_state->eip = state->eip;
    saved_state->fs = state->fs;
    saved_state->gs = state->gs;
}


kdp_error_t
kdp_machine_read_regs(
    unsigned int cpu,
    unsigned int flavor,
    char *data,
    int *size
)
{
    switch (flavor) {

    case i386_THREAD_STATE:
	dprintf(("kdp_readregs THREAD_STATE\n"));
	kdp_getstate((i386_thread_state_t *)data);
	*size = sizeof (i386_thread_state_t);
	return KDPERR_NO_ERROR;
	
    case i386_THREAD_FPSTATE:
	dprintf(("kdp_readregs THREAD_FPSTATE\n"));
	*(i386_thread_fpstate_t *)data = (i386_thread_fpstate_t) { 0 };	
	*size = sizeof (i386_thread_fpstate_t);
	return KDPERR_NO_ERROR;
	
    default:
	dprintf(("kdp_readregs bad flavor %d\n"));
	return KDPERR_BADFLAVOR;
    }
}

kdp_error_t
kdp_machine_write_regs(
    unsigned int cpu,
    unsigned int flavor,
    char *data,
    int *size
)
{
    switch (flavor) {

    case i386_THREAD_STATE:
	dprintf(("kdp_writeregs THREAD_STATE\n"));
	kdp_setstate((i386_thread_state_t *)data);
	return KDPERR_NO_ERROR;
	
    case i386_THREAD_FPSTATE:
	dprintf(("kdp_writeregs THREAD_FPSTATE\n"));
	return KDPERR_NO_ERROR;
	
    default:
	dprintf(("kdp_writeregs bad flavor %d\n"));
	return KDPERR_BADFLAVOR;
    }
}


void
kdp_machine_hostinfo(
    kdp_hostinfo_t *hostinfo
)
{
    machine_slot_t	m;
    int			i;

    hostinfo->cpus_mask = 0;

    for (i = 0; i < machine_info.max_cpus; i++) {
        m = &machine_slot[i];
        if (!m->is_cpu)
            continue;
	
        hostinfo->cpus_mask |= (1 << i);
    }

   /* FIXME?? */
    hostinfo->cpu_type = CPU_TYPE_I386;
    hostinfo->cpu_subtype = CPU_SUBTYPE_486;
}

void
kdp_panic(
    const char		*msg
)
{
    printf("kdp panic: %s\n", msg);    
    __asm__ volatile("hlt");	
}


void
kdp_reboot(void)
{
    kdreboot();
}

int
kdp_intr_disbl(void)
{
   return splhigh();
}

void
kdp_intr_enbl(int s)
{
	splx(s);
}

int
kdp_getc()
{
	return	cnmaygetc();
}

void
kdp_us_spin(int usec)
{
    extern void delay(int);

    delay(usec/100);
}

void print_saved_state(void *state)
{
    struct i386_saved_state	*saved_state;

    saved_state = state;

	printf("pc = 0x%x\n", saved_state->eip);
	printf("cr3= 0x%x\n", saved_state->cr2);
	printf("rp = TODO FIXME\n");
	printf("sp = 0x%x\n", saved_state->esp);

}

void
kdp_sync_cache()
{
	return;	/* No op here. */
}

void
kdp_call()
{
	__asm__ volatile ("int	$3");	/* Let the processor do the work */
}


typedef struct _cframe_t {
    struct _cframe_t	*prev;
    unsigned		caller;
    unsigned		args[0];
} cframe_t;


#define MAX_FRAME_DELTA		65536

void
kdp_i386_backtrace(void	*_frame, int nframes)
{
	cframe_t	*frame = (cframe_t *)_frame;
	int i;

	for (i=0; i<nframes; i++) {
	    if ((vm_offset_t)frame < VM_MIN_KERNEL_ADDRESS ||
	        (vm_offset_t)frame > VM_MAX_KERNEL_ADDRESS) {
		goto invalid;
	    }
	    printf("frame %x called by %x ",
		frame, frame->caller);
	    printf("args %x %x %x %x\n",
		frame->args[0], frame->args[1],
		frame->args[2], frame->args[3]);
	    if ((frame->prev < frame) ||	/* wrong direction */
	    	((frame->prev - frame) > MAX_FRAME_DELTA)) {
		goto invalid;
	    }
	    frame = frame->prev;
	}
	return;
invalid:
	printf("invalid frame pointer %x\n",frame);
}

void
kdp_i386_trap(
    unsigned int		trapno,
    struct i386_saved_state	*saved_state,
    kern_return_t	result,
    vm_offset_t		va
)
{
    unsigned int exception, subcode = 0, code;

    mp_kdp_enter();

    if (trapno != T_INT3 && trapno != T_DEBUG)
    	printf("unexpected kernel trap %x eip %x\n", trapno, saved_state->eip);

    switch (trapno) {
    
    case T_DIVIDE_ERROR:
	exception = EXC_ARITHMETIC;
	code = EXC_I386_DIVERR;
	break;
    
    case T_OVERFLOW:
	exception = EXC_SOFTWARE;
	code = EXC_I386_INTOFLT;
	break;
    
    case T_OUT_OF_BOUNDS:
	exception = EXC_ARITHMETIC;
	code = EXC_I386_BOUNDFLT;
	break;
    
    case T_INVALID_OPCODE:
	exception = EXC_BAD_INSTRUCTION;
	code = EXC_I386_INVOPFLT;
	break;
    
    case T_SEGMENT_NOT_PRESENT:
	exception = EXC_BAD_INSTRUCTION;
	code = EXC_I386_SEGNPFLT;
	subcode	= saved_state->err;
	break;
    
    case T_STACK_FAULT:
	exception = EXC_BAD_INSTRUCTION;
	code = EXC_I386_STKFLT;
	subcode	= saved_state->err;
	break;
    
    case T_GENERAL_PROTECTION:
	exception = EXC_BAD_INSTRUCTION;
	code = EXC_I386_GPFLT;
	subcode	= saved_state->err;
	break;
	
    case T_PAGE_FAULT:
    	exception = EXC_BAD_ACCESS;
	code = result;
	subcode = va;
	break;
    
    case T_WATCHPOINT:
	exception = EXC_SOFTWARE;
	code = EXC_I386_ALIGNFLT;
	break;
	
    case T_DEBUG:
    case T_INT3:
	exception = EXC_BREAKPOINT;
	code = EXC_I386_BPTFLT;
	break;

    default:
    	exception = EXC_BAD_INSTRUCTION;
	code = trapno;
	break;
    }

//    kdp_i386_backtrace((void *) saved_state->ebp, 10);

    kdp_raise_exception(exception, code, subcode, saved_state);

    mp_kdp_exit();
}

boolean_t 
kdp_call_kdb(
        void) 
{       
        return(FALSE);
}

unsigned int kdp_ml_get_breakinsn()
{
  return 0xcc;
}
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
e5568f75 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	*
e5568f75 A	12	* This Original Code and all software distributed under the License are
e5568f75 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,
e5568f75 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	*/
1c79356b A	22
	23	#include <mach/mach_types.h>
	24	#include <mach/machine.h>
	25	#include <mach/exception_types.h>
	26	#include <i386/trap.h>
55e303ae	27	#include <i386/mp.h>
1c79356b A	28	#include <kdp/kdp_internal.h>
	29
	30	#define KDP_TEST_HARNESS 0
	31	#if KDP_TEST_HARNESS
	32	#define dprintf(x) printf x
	33	#else
	34	#define dprintf(x)
	35	#endif
	36
	37	void print_saved_state(void *);
	38	void kdp_call(void);
	39	void kdp_i386_trap(unsigned int, struct i386_saved_state *, kern_return_t, vm_offset_t);
	40	int kdp_getc(void);
	41
	42	void
	43	kdp_exception(
	44	unsigned char *pkt,
	45	int *len,
	46	unsigned short *remote_port,
	47	unsigned int exception,
	48	unsigned int code,
	49	unsigned int subcode
	50	)
	51	{
	52	kdp_exception_t rq = (kdp_exception_t )pkt;
	53
	54	rq->hdr.request = KDP_EXCEPTION;
	55	rq->hdr.is_reply = 0;
	56	rq->hdr.seq = kdp.exception_seq;
	57	rq->hdr.key = 0;
	58	rq->hdr.len = sizeof (*rq);
	59
	60	rq->n_exc_info = 1;
	61	rq->exc_info[0].cpu = 0;
	62	rq->exc_info[0].exception = exception;
	63	rq->exc_info[0].code = code;
	64	rq->exc_info[0].subcode = subcode;
	65
	66	rq->hdr.len += rq->n_exc_info * sizeof (kdp_exc_info_t);
	67
	68	bcopy((char )rq, (char )pkt, rq->hdr.len);
	69
	70	kdp.exception_ack_needed = TRUE;
	71
	72	*remote_port = kdp.exception_port;
	73	*len = rq->hdr.len;
	74	}
	75
	76	boolean_t
	77	kdp_exception_ack(
	78	unsigned char *pkt,
	79	int len
	80	)
	81	{
	82	kdp_exception_ack_t rq = (kdp_exception_ack_t )pkt;
	83
	84	if (len < sizeof (*rq))
	85	return(FALSE);
	86
	87	if (!rq->hdr.is_reply \|\| rq->hdr.request != KDP_EXCEPTION)
	88	return(FALSE);
	89
	90	dprintf(("kdp_exception_ack seq %x %x\n", rq->hdr.seq, kdp.exception_seq));
	91
92	if (rq->hdr.seq == kdp.exception_seq) {
93	kdp.exception_ack_needed = FALSE;
94	kdp.exception_seq++;
95	}
96	return(TRUE);
97	}
98
99	void
100	kdp_getstate(
101	i386_thread_state_t *state
102	)
103	{
104	struct i386_saved_state *saved_state;
105
106	saved_state = (struct i386_saved_state *)kdp.saved_state;
107
108	*state = (i386_thread_state_t) { 0 };
109	state->eax = saved_state->eax;
110	state->ebx = saved_state->ebx;
111	state->ecx = saved_state->ecx;
112	state->edx = saved_state->edx;
113	state->edi = saved_state->edi;
114	state->esi = saved_state->esi;
115	state->ebp = saved_state->ebp;
116
117	if ((saved_state->cs & 0x3) == 0){ /* Kernel State */
118	state->esp = (unsigned int) &saved_state->uesp;
119	state->ss = KERNEL_DS;
120	} else {
121	state->esp = saved_state->uesp;
122	state->ss = saved_state->ss;
123	}
124
125	state->eflags = saved_state->efl;
126	state->eip = saved_state->eip;
127	state->cs = saved_state->cs;
128	state->ds = saved_state->ds;
129	state->es = saved_state->es;
130	state->fs = saved_state->fs;
131	state->gs = saved_state->gs;
132	}
133
134
135	void
136	kdp_setstate(
137	i386_thread_state_t *state
138	)
139	{
140	struct i386_saved_state *saved_state;
141
142	saved_state = (struct i386_saved_state *)kdp.saved_state;
143
144	saved_state->eax = state->eax;
145	saved_state->ebx = state->ebx;
146	saved_state->ecx = state->ecx;
147	saved_state->edx = state->edx;
148	saved_state->edi = state->edi;
149	saved_state->esi = state->esi;
150	saved_state->ebp = state->ebp;
151	saved_state->efl = state->eflags;
152	#if 0
153	saved_state->frame.eflags &= ~( EFL_VM \| EFL_NT \| EFL_IOPL \| EFL_CLR );
154	saved_state->frame.eflags \|= ( EFL_IF \| EFL_SET );
155	#endif
156	saved_state->eip = state->eip;
157	saved_state->fs = state->fs;
158	saved_state->gs = state->gs;
159	}
160
161
162	kdp_error_t
163	kdp_machine_read_regs(
164	unsigned int cpu,
165	unsigned int flavor,
166	char *data,
167	int *size
168	)
169	{
170	switch (flavor) {
171
172	case i386_THREAD_STATE:
173	dprintf(("kdp_readregs THREAD_STATE\n"));
174	kdp_getstate((i386_thread_state_t *)data);
175	*size = sizeof (i386_thread_state_t);
176	return KDPERR_NO_ERROR;
177
178	case i386_THREAD_FPSTATE:
179	dprintf(("kdp_readregs THREAD_FPSTATE\n"));
180	(i386_thread_fpstate_t )data = (i386_thread_fpstate_t) { 0 };
181	*size = sizeof (i386_thread_fpstate_t);
182	return KDPERR_NO_ERROR;
183
184	default:
185	dprintf(("kdp_readregs bad flavor %d\n"));
186	return KDPERR_BADFLAVOR;
187	}
188	}
189
190	kdp_error_t
191	kdp_machine_write_regs(
192	unsigned int cpu,
193	unsigned int flavor,
194	char *data,
195	int *size
196	)
197	{
198	switch (flavor) {
199
200	case i386_THREAD_STATE:
201	dprintf(("kdp_writeregs THREAD_STATE\n"));
202	kdp_setstate((i386_thread_state_t *)data);
203	return KDPERR_NO_ERROR;
204
205	case i386_THREAD_FPSTATE:
206	dprintf(("kdp_writeregs THREAD_FPSTATE\n"));
207	return KDPERR_NO_ERROR;
208
209	default:
210	dprintf(("kdp_writeregs bad flavor %d\n"));
211	return KDPERR_BADFLAVOR;
212	}
213	}
214
215
216
217	void
218	kdp_machine_hostinfo(
219	kdp_hostinfo_t *hostinfo
220	)
221	{
222	machine_slot_t m;
223	int i;
224
225	hostinfo->cpus_mask = 0;
226
227	for (i = 0; i < machine_info.max_cpus; i++) {
228	m = &machine_slot[i];
229	if (!m->is_cpu)
230	continue;
231
232	hostinfo->cpus_mask \|= (1 << i);
233	}
234
235	/* FIXME?? */
236	hostinfo->cpu_type = CPU_TYPE_I386;
237	hostinfo->cpu_subtype = CPU_SUBTYPE_486;
238	}
239
240	void
241	kdp_panic(
242	const char *msg
243	)
244	{
245	printf("kdp panic: %s\n", msg);
246	__asm__ volatile("hlt");
247	}
248
249
250	void
251	kdp_reboot(void)
252	{
253	kdreboot();
254	}
255
256	int
257	kdp_intr_disbl(void)
258	{
259	return splhigh();
260	}
261
262	void
263	kdp_intr_enbl(int s)
264	{
265	splx(s);
266	}
267
268	int
269	kdp_getc()
270	{
271	return cnmaygetc();
272	}
273
274	void
275	kdp_us_spin(int usec)
276	{
277	extern void delay(int);
278
279	delay(usec/100);
280	}
281
282	void print_saved_state(void *state)
283	{
284	struct i386_saved_state *saved_state;
285
286	saved_state = state;
287
288	printf("pc = 0x%x\n", saved_state->eip);
289	printf("cr3= 0x%x\n", saved_state->cr2);
290	printf("rp = TODO FIXME\n");
291	printf("sp = 0x%x\n", saved_state->esp);
292
293	}
294
295	void
296	kdp_sync_cache()
297	{
298	return; /* No op here. */
299	}
300
301	void
302	kdp_call()
303	{
304	__asm__ volatile ("int $3"); /* Let the processor do the work */
305	}
306
307
308	typedef struct _cframe_t {
309	struct _cframe_t *prev;
310	unsigned caller;
311	unsigned args[0];
312	} cframe_t;
313
314
315	#define MAX_FRAME_DELTA 65536
316
317	void
318	kdp_i386_backtrace(void *_frame, int nframes)
319	{
320	cframe_t frame = (cframe_t )_frame;
321	int i;
322
323	for (i=0; i<nframes; i++) {
324	if ((vm_offset_t)frame < VM_MIN_KERNEL_ADDRESS \|\|
325	(vm_offset_t)frame > VM_MAX_KERNEL_ADDRESS) {
326	goto invalid;
327	}
328	printf("frame %x called by %x ",
329	frame, frame->caller);
330	printf("args %x %x %x %x\n",
331	frame->args[0], frame->args[1],
332	frame->args[2], frame->args[3]);
333	if ((frame->prev < frame) \|\| /* wrong direction */
334	((frame->prev - frame) > MAX_FRAME_DELTA)) {
335	goto invalid;
336	}
337	frame = frame->prev;
338	}
339	return;
340	invalid:
55e303ae	341	printf("invalid frame pointer %x\n",frame);
1c79356b A	342	}
	343
	344	void
	345	kdp_i386_trap(
	346	unsigned int trapno,
	347	struct i386_saved_state *saved_state,
	348	kern_return_t result,
	349	vm_offset_t va
	350	)
	351	{
	352	unsigned int exception, subcode = 0, code;
	353
55e303ae A	354	mp_kdp_enter();
55e303ae A	355
1c79356b A	356	if (trapno != T_INT3 && trapno != T_DEBUG)
	357	printf("unexpected kernel trap %x eip %x\n", trapno, saved_state->eip);
	358
	359	switch (trapno) {
	360
	361	case T_DIVIDE_ERROR:
	362	exception = EXC_ARITHMETIC;
	363	code = EXC_I386_DIVERR;
	364	break;
	365
	366	case T_OVERFLOW:
	367	exception = EXC_SOFTWARE;
	368	code = EXC_I386_INTOFLT;
	369	break;
	370
	371	case T_OUT_OF_BOUNDS:
	372	exception = EXC_ARITHMETIC;
	373	code = EXC_I386_BOUNDFLT;
	374	break;
	375
	376	case T_INVALID_OPCODE:
	377	exception = EXC_BAD_INSTRUCTION;
	378	code = EXC_I386_INVOPFLT;
	379	break;
	380
	381	case T_SEGMENT_NOT_PRESENT:
	382	exception = EXC_BAD_INSTRUCTION;
	383	code = EXC_I386_SEGNPFLT;
	384	subcode = saved_state->err;
	385	break;
	386
	387	case T_STACK_FAULT:
	388	exception = EXC_BAD_INSTRUCTION;
	389	code = EXC_I386_STKFLT;
	390	subcode = saved_state->err;
	391	break;
	392
	393	case T_GENERAL_PROTECTION:
	394	exception = EXC_BAD_INSTRUCTION;
	395	code = EXC_I386_GPFLT;
	396	subcode = saved_state->err;
	397	break;
	398
	399	case T_PAGE_FAULT:
	400	exception = EXC_BAD_ACCESS;
	401	code = result;
	402	subcode = va;
	403	break;
	404
	405	case T_WATCHPOINT:
	406	exception = EXC_SOFTWARE;
	407	code = EXC_I386_ALIGNFLT;
	408	break;
	409
	410	case T_DEBUG:
	411	case T_INT3:
	412	exception = EXC_BREAKPOINT;
	413	code = EXC_I386_BPTFLT;
	414	break;
	415
	416	default:
	417	exception = EXC_BAD_INSTRUCTION;
	418	code = trapno;
	419	break;
420	}
421
55e303ae	422	// kdp_i386_backtrace((void *) saved_state->ebp, 10);
1c79356b A	423
1c79356b A	424	kdp_raise_exception(exception, code, subcode, saved_state);
55e303ae A	425
55e303ae A	426	mp_kdp_exit();
1c79356b A	427	}
	428
	429	boolean_t
	430	kdp_call_kdb(
	431	void)
	432	{
	433	return(FALSE);
	434	}
9bccf70c A	435
	436	unsigned int kdp_ml_get_breakinsn()
	437	{
	438	return 0xcc;
	439	}