WebSVN – HelenOS – Diff – /trunk/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 <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;
}
 
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->kernel_box, call);
        return;
    }
 
    if (rc != 0) {
        IPC_SET_RETVAL(call->data, 0);
        ipc_answer(&TASK->kernel_box, call);
    }
}
 
static void udebug_receive_end(call_t *call)
{
    int rc;
 
    rc = udebug_end();
 
    IPC_SET_RETVAL(call->data, rc);
    ipc_answer(&TASK->kernel_box, call);
}
 
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->kernel_box, call);
}
 
 
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->kernel_box, call);
        return;
    }
}
 
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->kernel_box, call);
}
 
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->kernel_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->kernel_box, call);
}
 
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->kernel_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->kernel_box, call);
}
 
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->kernel_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->kernel_box, call);
}
 
/**
 * Handle a debug call received on the kernel answerbox.
 *
 * This is called by the kbox servicing thread.
 */
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->kernel_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 3441	Rev 3457
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	*
-		37	* This module handles udebug IPC messages and calls the appropriate
-		38	* functions from the udebug_ops module which implement them.
36	*/	39	*/
37		40
38	#include <proc/task.h>	41	#include <proc/task.h>
39	#include <proc/thread.h>	42	#include <proc/thread.h>
40	#include <arch.h>	43	#include <arch.h>
41	#include <errno.h>	44	#include <errno.h>
42	#include <ipc/ipc.h>	45	#include <ipc/ipc.h>
43	#include <syscall/copy.h>	46	#include <syscall/copy.h>
44	#include <udebug/udebug.h>	47	#include <udebug/udebug.h>
45	#include <udebug/udebug_ops.h>	48	#include <udebug/udebug_ops.h>
46	#include <udebug/udebug_ipc.h>	49	#include <udebug/udebug_ipc.h>
47		50
48	int udebug_request_preprocess(call_t call, phone_t phone)	51	int udebug_request_preprocess(call_t call, phone_t phone)
49	{	52	{
50	switch (IPC_GET_ARG1(call->data)) {	53	switch (IPC_GET_ARG1(call->data)) {
51	/* future UDEBUG_M_REGS_WRITE, UDEBUG_M_MEM_WRITE: */	54	/* future UDEBUG_M_REGS_WRITE, UDEBUG_M_MEM_WRITE: */
52	default:	55	default:
53	break;	56	break;
54	}	57	}
55		58
56	return 0;	59	return 0;
57	}	60	}
58		61
59	static void udebug_receive_begin(call_t *call)	62	static void udebug_receive_begin(call_t *call)
60	{	63	{
61	int rc;	64	int rc;
62		65
63	rc = udebug_begin(call);	66	rc = udebug_begin(call);
64	if (rc < 0) {	67	if (rc < 0) {
65	IPC_SET_RETVAL(call->data, rc);	68	IPC_SET_RETVAL(call->data, rc);
66	ipc_answer(&TASK->kernel_box, call);	69	ipc_answer(&TASK->kernel_box, call);
67	return;	70	return;
68	}	71	}
69		72
70	if (rc != 0) {	73	if (rc != 0) {
71	IPC_SET_RETVAL(call->data, 0);	74	IPC_SET_RETVAL(call->data, 0);
72	ipc_answer(&TASK->kernel_box, call);	75	ipc_answer(&TASK->kernel_box, call);
73	}	76	}
74	}	77	}
75		78
76	static void udebug_receive_end(call_t *call)	79	static void udebug_receive_end(call_t *call)
77	{	80	{
78	int rc;	81	int rc;
79		82
80	rc = udebug_end();	83	rc = udebug_end();
81		84
82	IPC_SET_RETVAL(call->data, rc);	85	IPC_SET_RETVAL(call->data, rc);
83	ipc_answer(&TASK->kernel_box, call);	86	ipc_answer(&TASK->kernel_box, call);
84	}	87	}
85		88
86	static void udebug_receive_set_evmask(call_t *call)	89	static void udebug_receive_set_evmask(call_t *call)
87	{	90	{
88	int rc;	91	int rc;
89	udebug_evmask_t mask;	92	udebug_evmask_t mask;
90		93
91	mask = IPC_GET_ARG2(call->data);	94	mask = IPC_GET_ARG2(call->data);
92	rc = udebug_set_evmask(mask);	95	rc = udebug_set_evmask(mask);
93		96
94	IPC_SET_RETVAL(call->data, rc);	97	IPC_SET_RETVAL(call->data, rc);
95	ipc_answer(&TASK->kernel_box, call);	98	ipc_answer(&TASK->kernel_box, call);
96	}	99	}
97		100
98		101
99	static void udebug_receive_go(call_t *call)	102	static void udebug_receive_go(call_t *call)
100	{	103	{
101	thread_t *t;	104	thread_t *t;
102	int rc;	105	int rc;
103		106
104	t = (thread_t *)IPC_GET_ARG2(call->data);	107	t = (thread_t *)IPC_GET_ARG2(call->data);
105		108
106	rc = udebug_go(t, call);	109	rc = udebug_go(t, call);
107	if (rc < 0) {	110	if (rc < 0) {
108	IPC_SET_RETVAL(call->data, rc);	111	IPC_SET_RETVAL(call->data, rc);
109	ipc_answer(&TASK->kernel_box, call);	112	ipc_answer(&TASK->kernel_box, call);
110	return;	113	return;
111	}	114	}
112	}	115	}
113		116
114	static void udebug_receive_stop(call_t *call)	117	static void udebug_receive_stop(call_t *call)
115	{	118	{
116	thread_t *t;	119	thread_t *t;
117	int rc;	120	int rc;
118		121
119	t = (thread_t *)IPC_GET_ARG2(call->data);	122	t = (thread_t *)IPC_GET_ARG2(call->data);
120		123
121	rc = udebug_stop(t, call);	124	rc = udebug_stop(t, call);
122	IPC_SET_RETVAL(call->data, rc);	125	IPC_SET_RETVAL(call->data, rc);
123	ipc_answer(&TASK->kernel_box, call);	126	ipc_answer(&TASK->kernel_box, call);
124	}	127	}
125		128
126	static void udebug_receive_thread_read(call_t *call)	129	static void udebug_receive_thread_read(call_t *call)
127	{	130	{
128	unative_t uspace_addr;	131	unative_t uspace_addr;
129	unative_t to_copy;	132	unative_t to_copy;
130	unsigned total_bytes;	133	unsigned total_bytes;
131	unsigned buf_size;	134	unsigned buf_size;
132	void *buffer;	135	void *buffer;
133	size_t n;	136	size_t n;
134	int rc;	137	int rc;
135		138
136	uspace_addr = IPC_GET_ARG2(call->data); /* Destination address */	139	uspace_addr = IPC_GET_ARG2(call->data); /* Destination address */
137	buf_size = IPC_GET_ARG3(call->data); /* Dest. buffer size */	140	buf_size = IPC_GET_ARG3(call->data); /* Dest. buffer size */
138		141
139	/*	142	/*
140	* Read thread list. Variable n will be filled with actual number	143	* Read thread list. Variable n will be filled with actual number
141	* of threads times thread-id size.	144	* of threads times thread-id size.
142	*/	145	*/
143	rc = udebug_thread_read(&buffer, buf_size, &n);	146	rc = udebug_thread_read(&buffer, buf_size, &n);
144	if (rc < 0) {	147	if (rc < 0) {
145	IPC_SET_RETVAL(call->data, rc);	148	IPC_SET_RETVAL(call->data, rc);
146	ipc_answer(&TASK->kernel_box, call);	149	ipc_answer(&TASK->kernel_box, call);
147	return;	150	return;
148	}	151	}
149		152
150	total_bytes = n;	153	total_bytes = n;
151		154
152	/* Copy MAX(buf_size, total_bytes) bytes */	155	/* Copy MAX(buf_size, total_bytes) bytes */
153		156
154	if (buf_size > total_bytes)	157	if (buf_size > total_bytes)
155	to_copy = total_bytes;	158	to_copy = total_bytes;
156	else	159	else
157	to_copy = buf_size;	160	to_copy = buf_size;
158		161
159	/*	162	/*
160	* Make use of call->buffer to transfer data to caller's userspace	163	* Make use of call->buffer to transfer data to caller's userspace
161	*/	164	*/
162		165
163	IPC_SET_RETVAL(call->data, 0);	166	IPC_SET_RETVAL(call->data, 0);
164	/* ARG1=dest, ARG2=size as in IPC_M_DATA_READ so that	167	/* ARG1=dest, ARG2=size as in IPC_M_DATA_READ so that
165	same code in process_answer() can be used	168	same code in process_answer() can be used
166	(no way to distinguish method in answer) */	169	(no way to distinguish method in answer) */
167	IPC_SET_ARG1(call->data, uspace_addr);	170	IPC_SET_ARG1(call->data, uspace_addr);
168	IPC_SET_ARG2(call->data, to_copy);	171	IPC_SET_ARG2(call->data, to_copy);
169		172
170	IPC_SET_ARG3(call->data, total_bytes);	173	IPC_SET_ARG3(call->data, total_bytes);
171	call->buffer = buffer;	174	call->buffer = buffer;
172		175
173	ipc_answer(&TASK->kernel_box, call);	176	ipc_answer(&TASK->kernel_box, call);
174	}	177	}
175		178
176	static void udebug_receive_args_read(call_t *call)	179	static void udebug_receive_args_read(call_t *call)
177	{	180	{
178	thread_t *t;	181	thread_t *t;
179	unative_t uspace_addr;	182	unative_t uspace_addr;
180	int rc;	183	int rc;
181	void *buffer;	184	void *buffer;
182		185
183	t = (thread_t *)IPC_GET_ARG2(call->data);	186	t = (thread_t *)IPC_GET_ARG2(call->data);
184		187
185	rc = udebug_args_read(t, &buffer);	188	rc = udebug_args_read(t, &buffer);
186	if (rc != EOK) {	189	if (rc != EOK) {
187	IPC_SET_RETVAL(call->data, rc);	190	IPC_SET_RETVAL(call->data, rc);
188	ipc_answer(&TASK->kernel_box, call);	191	ipc_answer(&TASK->kernel_box, call);
189	return;	192	return;
190	}	193	}
191		194
192	/*	195	/*
193	* Make use of call->buffer to transfer data to caller's userspace	196	* Make use of call->buffer to transfer data to caller's userspace
194	*/	197	*/
195		198
196	uspace_addr = IPC_GET_ARG3(call->data);	199	uspace_addr = IPC_GET_ARG3(call->data);
197		200
198	IPC_SET_RETVAL(call->data, 0);	201	IPC_SET_RETVAL(call->data, 0);
199	/* ARG1=dest, ARG2=size as in IPC_M_DATA_READ so that	202	/* ARG1=dest, ARG2=size as in IPC_M_DATA_READ so that
200	same code in process_answer() can be used	203	same code in process_answer() can be used
201	(no way to distinguish method in answer) */	204	(no way to distinguish method in answer) */
202	IPC_SET_ARG1(call->data, uspace_addr);	205	IPC_SET_ARG1(call->data, uspace_addr);
203	IPC_SET_ARG2(call->data, 6 * sizeof(unative_t));	206	IPC_SET_ARG2(call->data, 6 * sizeof(unative_t));
204	call->buffer = buffer;	207	call->buffer = buffer;
205		208
206	ipc_answer(&TASK->kernel_box, call);	209	ipc_answer(&TASK->kernel_box, call);
207	}	210	}
208		211
209	static void udebug_receive_mem_read(call_t *call)	212	static void udebug_receive_mem_read(call_t *call)
210	{	213	{
211	unative_t uspace_dst;	214	unative_t uspace_dst;
212	unative_t uspace_src;	215	unative_t uspace_src;
213	unsigned size;	216	unsigned size;
214	void *buffer;	217	void *buffer;
215	int rc;	218	int rc;
216		219
217	uspace_dst = IPC_GET_ARG2(call->data);	220	uspace_dst = IPC_GET_ARG2(call->data);
218	uspace_src = IPC_GET_ARG3(call->data);	221	uspace_src = IPC_GET_ARG3(call->data);
219	size = IPC_GET_ARG4(call->data);	222	size = IPC_GET_ARG4(call->data);
220		223
221	rc = udebug_mem_read(uspace_src, size, &buffer);	224	rc = udebug_mem_read(uspace_src, size, &buffer);
222	if (rc < 0) {	225	if (rc < 0) {
223	IPC_SET_RETVAL(call->data, rc);	226	IPC_SET_RETVAL(call->data, rc);
224	ipc_answer(&TASK->kernel_box, call);	227	ipc_answer(&TASK->kernel_box, call);
225	return;	228	return;
226	}	229	}
227		230
228	IPC_SET_RETVAL(call->data, 0);	231	IPC_SET_RETVAL(call->data, 0);
229	/* ARG1=dest, ARG2=size as in IPC_M_DATA_READ so that	232	/* ARG1=dest, ARG2=size as in IPC_M_DATA_READ so that
230	same code in process_answer() can be used	233	same code in process_answer() can be used
231	(no way to distinguish method in answer) */	234	(no way to distinguish method in answer) */
232	IPC_SET_ARG1(call->data, uspace_dst);	235	IPC_SET_ARG1(call->data, uspace_dst);
233	IPC_SET_ARG2(call->data, size);	236	IPC_SET_ARG2(call->data, size);
234	call->buffer = buffer;	237	call->buffer = buffer;
235		238
236	ipc_answer(&TASK->kernel_box, call);	239	ipc_answer(&TASK->kernel_box, call);
237	}	240	}
238		241
239	/**	242	/**
240	* Handle a debug call received on the kernel answerbox.	243	* Handle a debug call received on the kernel answerbox.
241	*	244	*
242	* This is called by the kbox servicing thread.	245	* This is called by the kbox servicing thread.
243	*/	246	*/
244	void udebug_call_receive(call_t *call)	247	void udebug_call_receive(call_t *call)
245	{	248	{
246	int debug_method;	249	int debug_method;
247		250
248	debug_method = IPC_GET_ARG1(call->data);	251	debug_method = IPC_GET_ARG1(call->data);
249		252
250	if (debug_method != UDEBUG_M_BEGIN) {	253	if (debug_method != UDEBUG_M_BEGIN) {
251	/*	254	/*
252	* Verify that the sender is this task's debugger.	255	* Verify that the sender is this task's debugger.
253	* Note that this is the only thread that could change	256	* Note that this is the only thread that could change
254	* TASK->debugger. Therefore no locking is necessary	257	* TASK->debugger. Therefore no locking is necessary
255	* and the sender can be safely considered valid until	258	* and the sender can be safely considered valid until
256	* control exits this function.	259	* control exits this function.
257	*/	260	*/
258	if (TASK->udebug.debugger != call->sender) {	261	if (TASK->udebug.debugger != call->sender) {
259	IPC_SET_RETVAL(call->data, EINVAL);	262	IPC_SET_RETVAL(call->data, EINVAL);
260	ipc_answer(&TASK->kernel_box, call);	263	ipc_answer(&TASK->kernel_box, call);
261	return;	264	return;
262	}	265	}
263	}	266	}
264		267
265	switch (debug_method) {	268	switch (debug_method) {
266	case UDEBUG_M_BEGIN:	269	case UDEBUG_M_BEGIN:
267	udebug_receive_begin(call);	270	udebug_receive_begin(call);
268	break;	271	break;
269	case UDEBUG_M_END:	272	case UDEBUG_M_END:
270	udebug_receive_end(call);	273	udebug_receive_end(call);
271	break;	274	break;
272	case UDEBUG_M_SET_EVMASK:	275	case UDEBUG_M_SET_EVMASK:
273	udebug_receive_set_evmask(call);	276	udebug_receive_set_evmask(call);
274	break;	277	break;
275	case UDEBUG_M_GO:	278	case UDEBUG_M_GO:
276	udebug_receive_go(call);	279	udebug_receive_go(call);
277	break;	280	break;
278	case UDEBUG_M_STOP:	281	case UDEBUG_M_STOP:
279	udebug_receive_stop(call);	282	udebug_receive_stop(call);
280	break;	283	break;
281	case UDEBUG_M_THREAD_READ:	284	case UDEBUG_M_THREAD_READ:
282	udebug_receive_thread_read(call);	285	udebug_receive_thread_read(call);
283	break;	286	break;
284	case UDEBUG_M_ARGS_READ:	287	case UDEBUG_M_ARGS_READ:
285	udebug_receive_args_read(call);	288	udebug_receive_args_read(call);
286	break;	289	break;
287	case UDEBUG_M_MEM_READ:	290	case UDEBUG_M_MEM_READ:
288	udebug_receive_mem_read(call);	291	udebug_receive_mem_read(call);
289	break;	292	break;
290	}	293	}
291	}	294	}
292		295
293	/** @}	296	/** @}
294	*/	297	*/
295		298

Subversion Repositories HelenOS

(root)/trunk/kernel/generic/src/udebug/udebug_ipc.c – Rev 3441 → 3457