WebSVN – HelenOS – Diff – /branches/sparc/kernel/generic/src/udebug/udebug_ipc.c


/*
 * Copyright (c) 2008 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */
 
/** @addtogroup generic
 * @{
 */
 
/**
 * @file
 * @brief   Udebug IPC message handling.
 *
 * This module handles udebug IPC messages and calls the appropriate
 * functions from the udebug_ops module which implement them.
 */
 
#include <proc/task.h>
#include <proc/thread.h>
#include <arch.h>
#include <arch/asm.h>
#include <errno.h>
#include <ipc/ipc.h>
#include <syscall/copy.h>
#include <udebug/udebug.h>
#include <udebug/udebug_ops.h>
#include <udebug/udebug_ipc.h>
 
int udebug_request_preprocess(call_t *call, phone_t *phone)
{
    switch (IPC_GET_ARG1(call->data)) {
    /* future UDEBUG_M_REGS_WRITE, UDEBUG_M_MEM_WRITE: */
    default:
        break;
    }
 
    return 0;
}
 
/** Process a BEGIN call.
 *
 * Initiates a debugging session for the current task. The reply
 * to this call may or may not be sent before this function returns.
 *
 * @param call  The call structure.
 */
static void udebug_receive_begin(call_t *call)
{
    int rc;
 
    rc = udebug_begin(call);
    if (rc < 0) {
        IPC_SET_RETVAL(call->data, rc);
        ipc_answer(&TASK->kb.box, call);
        return;
    }
 
    /*
     * If the initialization of the debugging session has finished,
     * send a reply.
     */
    if (rc != 0) {
        IPC_SET_RETVAL(call->data, 0);
        ipc_answer(&TASK->kb.box, call);
    }
}
 
/** Process an END call.
 *
 * Terminates the debugging session for the current task.
 * @param call  The call structure.
 */
static void udebug_receive_end(call_t *call)
{
    int rc;
 
    rc = udebug_end();
 
    IPC_SET_RETVAL(call->data, rc);
    ipc_answer(&TASK->kb.box, call);
}
 
/** Process a SET_EVMASK call.
 *
 * Sets an event mask for the current debugging session.
 * @param call  The call structure.
 */
static void udebug_receive_set_evmask(call_t *call)
{
    int rc;
    udebug_evmask_t mask;
 
    mask = IPC_GET_ARG2(call->data);
    rc = udebug_set_evmask(mask);
 
    IPC_SET_RETVAL(call->data, rc);
    ipc_answer(&TASK->kb.box, call);
}
 
 
/** Process a GO call.
 *
 * Resumes execution of the specified thread.
 * @param call  The call structure.
 */
static void udebug_receive_go(call_t *call)
{
    thread_t *t;
    int rc;
 
    t = (thread_t *)IPC_GET_ARG2(call->data);
 
    rc = udebug_go(t, call);
    if (rc < 0) {
        IPC_SET_RETVAL(call->data, rc);
        ipc_answer(&TASK->kb.box, call);
        return;
    }
}
 
/** Process a STOP call.
 *
 * Suspends execution of the specified thread.
 * @param call  The call structure.
 */
static void udebug_receive_stop(call_t *call)
{
    thread_t *t;
    int rc;
 
    t = (thread_t *)IPC_GET_ARG2(call->data);
 
    rc = udebug_stop(t, call);
    IPC_SET_RETVAL(call->data, rc);
    ipc_answer(&TASK->kb.box, call);
}
 
/** Process a THREAD_READ call.
 *
 * Reads the list of hashes of the (userspace) threads in the current task.
 * @param call  The call structure.
 */
static void udebug_receive_thread_read(call_t *call)
{
    unative_t uspace_addr;
    unative_t to_copy;
    unsigned total_bytes;
    unsigned buf_size;
    void *buffer;
    size_t n;
    int rc;
 
    uspace_addr = IPC_GET_ARG2(call->data); /* Destination address */
    buf_size = IPC_GET_ARG3(call->data);    /* Dest. buffer size */
 
    /*
     * Read thread list. Variable n will be filled with actual number
     * of threads times thread-id size.
     */
    rc = udebug_thread_read(&buffer, buf_size, &n);
    if (rc < 0) {
        IPC_SET_RETVAL(call->data, rc);
        ipc_answer(&TASK->kb.box, call);
        return;
    }
 
    total_bytes = n;
 
    /* Copy MAX(buf_size, total_bytes) bytes */
 
    if (buf_size > total_bytes)
        to_copy = total_bytes;
    else
        to_copy = buf_size;
 
    /*
     * Make use of call->buffer to transfer data to caller's userspace
     */
 
    IPC_SET_RETVAL(call->data, 0);
    /* ARG1=dest, ARG2=size as in IPC_M_DATA_READ so that
       same code in process_answer() can be used
       (no way to distinguish method in answer) */
    IPC_SET_ARG1(call->data, uspace_addr);
    IPC_SET_ARG2(call->data, to_copy);
 
    IPC_SET_ARG3(call->data, total_bytes);
    call->buffer = buffer;
 
    ipc_answer(&TASK->kb.box, call);
}
 
/** Process an ARGS_READ call.
 *
 * Reads the argument of a current syscall event (SYSCALL_B or SYSCALL_E).
 * @param call  The call structure.
 */
static void udebug_receive_args_read(call_t *call)
{
    thread_t *t;
    unative_t uspace_addr;
    int rc;
    void *buffer;
 
    t = (thread_t *)IPC_GET_ARG2(call->data);
 
    rc = udebug_args_read(t, &buffer);
    if (rc != EOK) {
        IPC_SET_RETVAL(call->data, rc);
        ipc_answer(&TASK->kb.box, call);
        return;
    }
 
    /*
     * Make use of call->buffer to transfer data to caller's userspace
     */
 
    uspace_addr = IPC_GET_ARG3(call->data);
 
    IPC_SET_RETVAL(call->data, 0);
    /* ARG1=dest, ARG2=size as in IPC_M_DATA_READ so that
       same code in process_answer() can be used
       (no way to distinguish method in answer) */
    IPC_SET_ARG1(call->data, uspace_addr);
    IPC_SET_ARG2(call->data, 6 * sizeof(unative_t));
    call->buffer = buffer;
 
    ipc_answer(&TASK->kb.box, call);
}
 
/** Process an MEM_READ call.
 *
 * Reads memory of the current (debugged) task.
 * @param call  The call structure.
 */
static void udebug_receive_mem_read(call_t *call)
{
    unative_t uspace_dst;
    unative_t uspace_src;
    unsigned size;
    void *buffer;
    int rc;
 
    uspace_dst = IPC_GET_ARG2(call->data);
    uspace_src = IPC_GET_ARG3(call->data);
    size = IPC_GET_ARG4(call->data);
 
    rc = udebug_mem_read(uspace_src, size, &buffer);
    if (rc < 0) {
        IPC_SET_RETVAL(call->data, rc);
        ipc_answer(&TASK->kb.box, call);
        return;
    }
 
    IPC_SET_RETVAL(call->data, 0);
    /* ARG1=dest, ARG2=size as in IPC_M_DATA_READ so that
       same code in process_answer() can be used
       (no way to distinguish method in answer) */
    IPC_SET_ARG1(call->data, uspace_dst);
    IPC_SET_ARG2(call->data, size);
    call->buffer = buffer;
 
    ipc_answer(&TASK->kb.box, call);
}
 
/** Handle a debug call received on the kernel answerbox.
 *
 * This is called by the kbox servicing thread. Verifies that the sender
 * is indeed the debugger and calls the appropriate processing function.
 */
void udebug_call_receive(call_t *call)
{
    int debug_method;
 
    debug_method = IPC_GET_ARG1(call->data);
 
    if (debug_method != UDEBUG_M_BEGIN) {
        /*
         * Verify that the sender is this task's debugger.
         * Note that this is the only thread that could change
         * TASK->debugger. Therefore no locking is necessary
         * and the sender can be safely considered valid until
         * control exits this function.
         */
        if (TASK->udebug.debugger != call->sender) {
            IPC_SET_RETVAL(call->data, EINVAL);
            ipc_answer(&TASK->kb.box, call);
            return;
        }
    }
 
    switch (debug_method) {
    case UDEBUG_M_BEGIN:
        udebug_receive_begin(call);
        break;
    case UDEBUG_M_END:
        udebug_receive_end(call);
        break;
    case UDEBUG_M_SET_EVMASK:
        udebug_receive_set_evmask(call);
        break;
    case UDEBUG_M_GO:
        udebug_receive_go(call);
        break;
    case UDEBUG_M_STOP:
        udebug_receive_stop(call);
        break;
    case UDEBUG_M_THREAD_READ:
        udebug_receive_thread_read(call);
        break;
    case UDEBUG_M_ARGS_READ:
        udebug_receive_args_read(call);
        break;
    case UDEBUG_M_MEM_READ:
        udebug_receive_mem_read(call);
        break;
    }
}
 
/** @}
 */
 

Rev 3665	Rev 4073
1	/*	1	/*
2	* Copyright (c) 2008 Jiri Svoboda	2	* Copyright (c) 2008 Jiri Svoboda
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup generic	29	/** @addtogroup generic
30	* @{	30	* @{
31	*/	31	*/
32		32
33	/**	33	/**
34	* @file	34	* @file
35	* @brief Udebug IPC message handling.	35	* @brief Udebug IPC message handling.
36	*	36	*
37	* This module handles udebug IPC messages and calls the appropriate	37	* This module handles udebug IPC messages and calls the appropriate
38	* functions from the udebug_ops module which implement them.	38	* functions from the udebug_ops module which implement them.
39	*/	39	*/
40		40
41	#include <proc/task.h>	41	#include <proc/task.h>
42	#include <proc/thread.h>	42	#include <proc/thread.h>
43	#include <arch.h>	43	#include <arch.h>
-		44	#include <arch/asm.h>
44	#include <errno.h>	45	#include <errno.h>
45	#include <ipc/ipc.h>	46	#include <ipc/ipc.h>
46	#include <syscall/copy.h>	47	#include <syscall/copy.h>
47	#include <udebug/udebug.h>	48	#include <udebug/udebug.h>
48	#include <udebug/udebug_ops.h>	49	#include <udebug/udebug_ops.h>
49	#include <udebug/udebug_ipc.h>	50	#include <udebug/udebug_ipc.h>
50		51
51	int udebug_request_preprocess(call_t call, phone_t phone)	52	int udebug_request_preprocess(call_t call, phone_t phone)
52	{	53	{
53	switch (IPC_GET_ARG1(call->data)) {	54	switch (IPC_GET_ARG1(call->data)) {
54	/* future UDEBUG_M_REGS_WRITE, UDEBUG_M_MEM_WRITE: */	55	/* future UDEBUG_M_REGS_WRITE, UDEBUG_M_MEM_WRITE: */
55	default:	56	default:
56	break;	57	break;
57	}	58	}
58		59
59	return 0;	60	return 0;
60	}	61	}
61		62
62	/** Process a BEGIN call.	63	/** Process a BEGIN call.
63	*	64	*
64	* Initiates a debugging session for the current task. The reply	65	* Initiates a debugging session for the current task. The reply
65	* to this call may or may not be sent before this function returns.	66	* to this call may or may not be sent before this function returns.
66	*	67	*
67	* @param call The call structure.	68	* @param call The call structure.
68	*/	69	*/
69	static void udebug_receive_begin(call_t *call)	70	static void udebug_receive_begin(call_t *call)
70	{	71	{
71	int rc;	72	int rc;
72		73
73	rc = udebug_begin(call);	74	rc = udebug_begin(call);
74	if (rc < 0) {	75	if (rc < 0) {
75	IPC_SET_RETVAL(call->data, rc);	76	IPC_SET_RETVAL(call->data, rc);
76	ipc_answer(&TASK->kb.box, call);	77	ipc_answer(&TASK->kb.box, call);
77	return;	78	return;
78	}	79	}
79		80
80	/*	81	/*
81	* If the initialization of the debugging session has finished,	82	* If the initialization of the debugging session has finished,
82	* send a reply.	83	* send a reply.
83	*/	84	*/
84	if (rc != 0) {	85	if (rc != 0) {
85	IPC_SET_RETVAL(call->data, 0);	86	IPC_SET_RETVAL(call->data, 0);
86	ipc_answer(&TASK->kb.box, call);	87	ipc_answer(&TASK->kb.box, call);
87	}	88	}
88	}	89	}
89		90
90	/** Process an END call.	91	/** Process an END call.
91	*	92	*
92	* Terminates the debugging session for the current task.	93	* Terminates the debugging session for the current task.
93	* @param call The call structure.	94	* @param call The call structure.
94	*/	95	*/
95	static void udebug_receive_end(call_t *call)	96	static void udebug_receive_end(call_t *call)
96	{	97	{
97	int rc;	98	int rc;
98		99
99	rc = udebug_end();	100	rc = udebug_end();
100		101
101	IPC_SET_RETVAL(call->data, rc);	102	IPC_SET_RETVAL(call->data, rc);
102	ipc_answer(&TASK->kb.box, call);	103	ipc_answer(&TASK->kb.box, call);
103	}	104	}
104		105
105	/** Process a SET_EVMASK call.	106	/** Process a SET_EVMASK call.
106	*	107	*
107	* Sets an event mask for the current debugging session.	108	* Sets an event mask for the current debugging session.
108	* @param call The call structure.	109	* @param call The call structure.
109	*/	110	*/
110	static void udebug_receive_set_evmask(call_t *call)	111	static void udebug_receive_set_evmask(call_t *call)
111	{	112	{
112	int rc;	113	int rc;
113	udebug_evmask_t mask;	114	udebug_evmask_t mask;
114		115
115	mask = IPC_GET_ARG2(call->data);	116	mask = IPC_GET_ARG2(call->data);
116	rc = udebug_set_evmask(mask);	117	rc = udebug_set_evmask(mask);
117		118
118	IPC_SET_RETVAL(call->data, rc);	119	IPC_SET_RETVAL(call->data, rc);
119	ipc_answer(&TASK->kb.box, call);	120	ipc_answer(&TASK->kb.box, call);
120	}	121	}
121		122
122		123
123	/** Process a GO call.	124	/** Process a GO call.
124	*	125	*
125	* Resumes execution of the specified thread.	126	* Resumes execution of the specified thread.
126	* @param call The call structure.	127	* @param call The call structure.
127	*/	128	*/
128	static void udebug_receive_go(call_t *call)	129	static void udebug_receive_go(call_t *call)
129	{	130	{
130	thread_t *t;	131	thread_t *t;
131	int rc;	132	int rc;
132		133
133	t = (thread_t *)IPC_GET_ARG2(call->data);	134	t = (thread_t *)IPC_GET_ARG2(call->data);
134		135
135	rc = udebug_go(t, call);	136	rc = udebug_go(t, call);
136	if (rc < 0) {	137	if (rc < 0) {
137	IPC_SET_RETVAL(call->data, rc);	138	IPC_SET_RETVAL(call->data, rc);
138	ipc_answer(&TASK->kb.box, call);	139	ipc_answer(&TASK->kb.box, call);
139	return;	140	return;
140	}	141	}
141	}	142	}
142		143
143	/** Process a STOP call.	144	/** Process a STOP call.
144	*	145	*
145	* Suspends execution of the specified thread.	146	* Suspends execution of the specified thread.
146	* @param call The call structure.	147	* @param call The call structure.
147	*/	148	*/
148	static void udebug_receive_stop(call_t *call)	149	static void udebug_receive_stop(call_t *call)
149	{	150	{
150	thread_t *t;	151	thread_t *t;
151	int rc;	152	int rc;
152		153
153	t = (thread_t *)IPC_GET_ARG2(call->data);	154	t = (thread_t *)IPC_GET_ARG2(call->data);
154		155
155	rc = udebug_stop(t, call);	156	rc = udebug_stop(t, call);
156	IPC_SET_RETVAL(call->data, rc);	157	IPC_SET_RETVAL(call->data, rc);
157	ipc_answer(&TASK->kb.box, call);	158	ipc_answer(&TASK->kb.box, call);
158	}	159	}
159		160
160	/** Process a THREAD_READ call.	161	/** Process a THREAD_READ call.
161	*	162	*
162	* Reads the list of hashes of the (userspace) threads in the current task.	163	* Reads the list of hashes of the (userspace) threads in the current task.
163	* @param call The call structure.	164	* @param call The call structure.
164	*/	165	*/
165	static void udebug_receive_thread_read(call_t *call)	166	static void udebug_receive_thread_read(call_t *call)
166	{	167	{
167	unative_t uspace_addr;	168	unative_t uspace_addr;
168	unative_t to_copy;	169	unative_t to_copy;
169	unsigned total_bytes;	170	unsigned total_bytes;
170	unsigned buf_size;	171	unsigned buf_size;
171	void *buffer;	172	void *buffer;
172	size_t n;	173	size_t n;
173	int rc;	174	int rc;
174		175
175	uspace_addr = IPC_GET_ARG2(call->data); /* Destination address */	176	uspace_addr = IPC_GET_ARG2(call->data); /* Destination address */
176	buf_size = IPC_GET_ARG3(call->data); /* Dest. buffer size */	177	buf_size = IPC_GET_ARG3(call->data); /* Dest. buffer size */
177		178
178	/*	179	/*
179	* Read thread list. Variable n will be filled with actual number	180	* Read thread list. Variable n will be filled with actual number
180	* of threads times thread-id size.	181	* of threads times thread-id size.
181	*/	182	*/
182	rc = udebug_thread_read(&buffer, buf_size, &n);	183	rc = udebug_thread_read(&buffer, buf_size, &n);
183	if (rc < 0) {	184	if (rc < 0) {
184	IPC_SET_RETVAL(call->data, rc);	185	IPC_SET_RETVAL(call->data, rc);
185	ipc_answer(&TASK->kb.box, call);	186	ipc_answer(&TASK->kb.box, call);
186	return;	187	return;
187	}	188	}
188		189
189	total_bytes = n;	190	total_bytes = n;
190		191
191	/* Copy MAX(buf_size, total_bytes) bytes */	192	/* Copy MAX(buf_size, total_bytes) bytes */
192		193
193	if (buf_size > total_bytes)	194	if (buf_size > total_bytes)
194	to_copy = total_bytes;	195	to_copy = total_bytes;
195	else	196	else
196	to_copy = buf_size;	197	to_copy = buf_size;
197		198
198	/*	199	/*
199	* Make use of call->buffer to transfer data to caller's userspace	200	* Make use of call->buffer to transfer data to caller's userspace
200	*/	201	*/
201		202
202	IPC_SET_RETVAL(call->data, 0);	203	IPC_SET_RETVAL(call->data, 0);
203	/* ARG1=dest, ARG2=size as in IPC_M_DATA_READ so that	204	/* ARG1=dest, ARG2=size as in IPC_M_DATA_READ so that
204	same code in process_answer() can be used	205	same code in process_answer() can be used
205	(no way to distinguish method in answer) */	206	(no way to distinguish method in answer) */
206	IPC_SET_ARG1(call->data, uspace_addr);	207	IPC_SET_ARG1(call->data, uspace_addr);
207	IPC_SET_ARG2(call->data, to_copy);	208	IPC_SET_ARG2(call->data, to_copy);
208		209
209	IPC_SET_ARG3(call->data, total_bytes);	210	IPC_SET_ARG3(call->data, total_bytes);
210	call->buffer = buffer;	211	call->buffer = buffer;
211		212
212	ipc_answer(&TASK->kb.box, call);	213	ipc_answer(&TASK->kb.box, call);
213	}	214	}
214		215
215	/** Process an ARGS_READ call.	216	/** Process an ARGS_READ call.
216	*	217	*
217	* Reads the argument of a current syscall event (SYSCALL_B or SYSCALL_E).	218	* Reads the argument of a current syscall event (SYSCALL_B or SYSCALL_E).
218	* @param call The call structure.	219	* @param call The call structure.
219	*/	220	*/
220	static void udebug_receive_args_read(call_t *call)	221	static void udebug_receive_args_read(call_t *call)
221	{	222	{
222	thread_t *t;	223	thread_t *t;
223	unative_t uspace_addr;	224	unative_t uspace_addr;
224	int rc;	225	int rc;
225	void *buffer;	226	void *buffer;
226		227
227	t = (thread_t *)IPC_GET_ARG2(call->data);	228	t = (thread_t *)IPC_GET_ARG2(call->data);
228		229
229	rc = udebug_args_read(t, &buffer);	230	rc = udebug_args_read(t, &buffer);
230	if (rc != EOK) {	231	if (rc != EOK) {
231	IPC_SET_RETVAL(call->data, rc);	232	IPC_SET_RETVAL(call->data, rc);
232	ipc_answer(&TASK->kb.box, call);	233	ipc_answer(&TASK->kb.box, call);
233	return;	234	return;
234	}	235	}
235		236
236	/*	237	/*
237	* Make use of call->buffer to transfer data to caller's userspace	238	* Make use of call->buffer to transfer data to caller's userspace
238	*/	239	*/
239		240
240	uspace_addr = IPC_GET_ARG3(call->data);	241	uspace_addr = IPC_GET_ARG3(call->data);
241		242
242	IPC_SET_RETVAL(call->data, 0);	243	IPC_SET_RETVAL(call->data, 0);
243	/* ARG1=dest, ARG2=size as in IPC_M_DATA_READ so that	244	/* ARG1=dest, ARG2=size as in IPC_M_DATA_READ so that
244	same code in process_answer() can be used	245	same code in process_answer() can be used
245	(no way to distinguish method in answer) */	246	(no way to distinguish method in answer) */
246	IPC_SET_ARG1(call->data, uspace_addr);	247	IPC_SET_ARG1(call->data, uspace_addr);
247	IPC_SET_ARG2(call->data, 6 * sizeof(unative_t));	248	IPC_SET_ARG2(call->data, 6 * sizeof(unative_t));
248	call->buffer = buffer;	249	call->buffer = buffer;
249		250
250	ipc_answer(&TASK->kb.box, call);	251	ipc_answer(&TASK->kb.box, call);
251	}	252	}
252		253
253	/** Process an MEM_READ call.	254	/** Process an MEM_READ call.
254	*	255	*
255	* Reads memory of the current (debugged) task.	256	* Reads memory of the current (debugged) task.
256	* @param call The call structure.	257	* @param call The call structure.
257	*/	258	*/
258	static void udebug_receive_mem_read(call_t *call)	259	static void udebug_receive_mem_read(call_t *call)
259	{	260	{
260	unative_t uspace_dst;	261	unative_t uspace_dst;
261	unative_t uspace_src;	262	unative_t uspace_src;
262	unsigned size;	263	unsigned size;
263	void *buffer;	264	void *buffer;
264	int rc;	265	int rc;
265		266
266	uspace_dst = IPC_GET_ARG2(call->data);	267	uspace_dst = IPC_GET_ARG2(call->data);
267	uspace_src = IPC_GET_ARG3(call->data);	268	uspace_src = IPC_GET_ARG3(call->data);
268	size = IPC_GET_ARG4(call->data);	269	size = IPC_GET_ARG4(call->data);
269		270
270	rc = udebug_mem_read(uspace_src, size, &buffer);	271	rc = udebug_mem_read(uspace_src, size, &buffer);
271	if (rc < 0) {	272	if (rc < 0) {
272	IPC_SET_RETVAL(call->data, rc);	273	IPC_SET_RETVAL(call->data, rc);
273	ipc_answer(&TASK->kb.box, call);	274	ipc_answer(&TASK->kb.box, call);
274	return;	275	return;
275	}	276	}
276		277
277	IPC_SET_RETVAL(call->data, 0);	278	IPC_SET_RETVAL(call->data, 0);
278	/* ARG1=dest, ARG2=size as in IPC_M_DATA_READ so that	279	/* ARG1=dest, ARG2=size as in IPC_M_DATA_READ so that
279	same code in process_answer() can be used	280	same code in process_answer() can be used
280	(no way to distinguish method in answer) */	281	(no way to distinguish method in answer) */
281	IPC_SET_ARG1(call->data, uspace_dst);	282	IPC_SET_ARG1(call->data, uspace_dst);
282	IPC_SET_ARG2(call->data, size);	283	IPC_SET_ARG2(call->data, size);
283	call->buffer = buffer;	284	call->buffer = buffer;
284		285
285	ipc_answer(&TASK->kb.box, call);	286	ipc_answer(&TASK->kb.box, call);
286	}	287	}
287		288
288	/** Handle a debug call received on the kernel answerbox.	289	/** Handle a debug call received on the kernel answerbox.
289	*	290	*
290	* This is called by the kbox servicing thread. Verifies that the sender	291	* This is called by the kbox servicing thread. Verifies that the sender
291	* is indeed the debugger and calls the appropriate processing function.	292	* is indeed the debugger and calls the appropriate processing function.
292	*/	293	*/
293	void udebug_call_receive(call_t *call)	294	void udebug_call_receive(call_t *call)
294	{	295	{
295	int debug_method;	296	int debug_method;
296		297
297	debug_method = IPC_GET_ARG1(call->data);	298	debug_method = IPC_GET_ARG1(call->data);
298		299
299	if (debug_method != UDEBUG_M_BEGIN) {	300	if (debug_method != UDEBUG_M_BEGIN) {
300	/*	301	/*
301	* Verify that the sender is this task's debugger.	302	* Verify that the sender is this task's debugger.
302	* Note that this is the only thread that could change	303	* Note that this is the only thread that could change
303	* TASK->debugger. Therefore no locking is necessary	304	* TASK->debugger. Therefore no locking is necessary
304	* and the sender can be safely considered valid until	305	* and the sender can be safely considered valid until
305	* control exits this function.	306	* control exits this function.
306	*/	307	*/
307	if (TASK->udebug.debugger != call->sender) {	308	if (TASK->udebug.debugger != call->sender) {
308	IPC_SET_RETVAL(call->data, EINVAL);	309	IPC_SET_RETVAL(call->data, EINVAL);
309	ipc_answer(&TASK->kb.box, call);	310	ipc_answer(&TASK->kb.box, call);
310	return;	311	return;
311	}	312	}
312	}	313	}
313		314
314	switch (debug_method) {	315	switch (debug_method) {
315	case UDEBUG_M_BEGIN:	316	case UDEBUG_M_BEGIN:
316	udebug_receive_begin(call);	317	udebug_receive_begin(call);
317	break;	318	break;
318	case UDEBUG_M_END:	319	case UDEBUG_M_END:
319	udebug_receive_end(call);	320	udebug_receive_end(call);
320	break;	321	break;
321	case UDEBUG_M_SET_EVMASK:	322	case UDEBUG_M_SET_EVMASK:
322	udebug_receive_set_evmask(call);	323	udebug_receive_set_evmask(call);
323	break;	324	break;
324	case UDEBUG_M_GO:	325	case UDEBUG_M_GO:
325	udebug_receive_go(call);	326	udebug_receive_go(call);
326	break;	327	break;
327	case UDEBUG_M_STOP:	328	case UDEBUG_M_STOP:
328	udebug_receive_stop(call);	329	udebug_receive_stop(call);
329	break;	330	break;
330	case UDEBUG_M_THREAD_READ:	331	case UDEBUG_M_THREAD_READ:
331	udebug_receive_thread_read(call);	332	udebug_receive_thread_read(call);
332	break;	333	break;
333	case UDEBUG_M_ARGS_READ:	334	case UDEBUG_M_ARGS_READ:
334	udebug_receive_args_read(call);	335	udebug_receive_args_read(call);
335	break;	336	break;
336	case UDEBUG_M_MEM_READ:	337	case UDEBUG_M_MEM_READ:
337	udebug_receive_mem_read(call);	338	udebug_receive_mem_read(call);
338	break;	339	break;
339	}	340	}
340	}	341	}
341		342
342	/** @}	343	/** @}
343	*/	344	*/
344		345

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(root)/branches/sparc/kernel/generic/src/udebug/udebug_ipc.c – Rev 3665 → 4073