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1027 palkovsky 1
/*
2
 * Copyright (C) 2006 Ondrej Palkovsky
3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
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
15
 *   derived from this software without specific prior written permission.
16
 *
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
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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
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
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
29
#include <arch.h>
30
#include <proc/task.h>
1288 jermar 31
#include <proc/thread.h>
1027 palkovsky 32
#include <errno.h>
33
#include <memstr.h>
34
#include <debug.h>
35
#include <ipc/ipc.h>
36
#include <ipc/sysipc.h>
1281 palkovsky 37
#include <ipc/irq.h>
1072 palkovsky 38
#include <ipc/ipcrsc.h>
1258 palkovsky 39
#include <arch/interrupt.h>
1027 palkovsky 40
#include <print.h>
1288 jermar 41
#include <syscall/copy.h>
1297 jermar 42
#include <security/cap.h>
1329 palkovsky 43
#include <mm/as.h>
1027 palkovsky 44
 
1084 palkovsky 45
#define GET_CHECK_PHONE(phone,phoneid,err) { \
46
      if (phoneid > IPC_MAX_PHONES) { err; } \
47
      phone = &TASK->phones[phoneid]; \
48
}
49
 
1090 palkovsky 50
#define STRUCT_TO_USPACE(dst,src) copy_to_uspace(dst,src,sizeof(*(src)))
1084 palkovsky 51
 
1040 palkovsky 52
/** Return true if the method is a system method */
53
static inline int is_system_method(__native method)
54
{
55
    if (method <= IPC_M_LAST_SYSTEM)
56
        return 1;
57
    return 0;
58
}
59
 
60
/** Return true if the message with this method is forwardable
61
 *
62
 * - some system messages may be forwarded, for some of them
63
 *   it is useless
64
 */
65
static inline int is_forwardable(__native method)
66
{
1428 palkovsky 67
    if (method == IPC_M_PHONE_HUNGUP || method == IPC_M_AS_AREA_SEND \
68
        || method == IPC_M_AS_AREA_RECV)
1086 palkovsky 69
        return 0; /* This message is meant only for the receiver */
1040 palkovsky 70
    return 1;
71
}
72
 
1027 palkovsky 73
/****************************************************/
74
/* Functions that preprocess answer before sending
75
 * it to the recepient
76
 */
77
 
78
/** Return true if the caller (ipc_answer) should save
1088 palkovsky 79
 * the old call contents for answer_preprocess
1027 palkovsky 80
 */
1088 palkovsky 81
static inline int answer_need_old(call_t *call)
1027 palkovsky 82
{
1086 palkovsky 83
    if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)
1027 palkovsky 84
        return 1;
1086 palkovsky 85
    if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_ME_TO)
1060 palkovsky 86
        return 1;
1359 jermar 87
    if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_SEND)
1329 palkovsky 88
        return 1;
1428 palkovsky 89
    if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_RECV)
90
        return 1;
1027 palkovsky 91
    return 0;
92
}
93
 
1428 palkovsky 94
/** Interpret process answer as control information
95
 *
96
 * This function is called directly after sys_ipc_answer
97
 */
1329 palkovsky 98
static inline int answer_preprocess(call_t *answer, ipc_data_t *olddata)
1027 palkovsky 99
{
100
    int phoneid;
101
 
1088 palkovsky 102
    if (IPC_GET_RETVAL(answer->data) == EHANGUP) {
1141 palkovsky 103
        /* In case of forward, hangup the forwared phone,
104
         * not the originator
105
         */
106
        spinlock_lock(&answer->data.phone->lock);
107
        spinlock_lock(&TASK->answerbox.lock);
1568 palkovsky 108
        if (answer->data.phone->state == IPC_PHONE_CONNECTED) {
1573 palkovsky 109
            list_remove(&answer->data.phone->link);
1568 palkovsky 110
            answer->data.phone->state = IPC_PHONE_SLAMMED;
1141 palkovsky 111
        }
112
        spinlock_unlock(&TASK->answerbox.lock);
113
        spinlock_unlock(&answer->data.phone->lock);
1088 palkovsky 114
    }
115
 
116
    if (!olddata)
1329 palkovsky 117
        return 0;
1088 palkovsky 118
 
1086 palkovsky 119
    if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) {
1040 palkovsky 120
        phoneid = IPC_GET_ARG3(*olddata);
1027 palkovsky 121
        if (IPC_GET_RETVAL(answer->data)) {
122
            /* The connection was not accepted */
123
            phone_dealloc(phoneid);
1040 palkovsky 124
        } else {
1090 palkovsky 125
            /* The connection was accepted */
1040 palkovsky 126
            phone_connect(phoneid,&answer->sender->answerbox);
1090 palkovsky 127
            /* Set 'phone identification' as arg3 of response */
128
            IPC_SET_ARG3(answer->data, (__native)&TASK->phones[phoneid]);
1027 palkovsky 129
        }
1086 palkovsky 130
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) {
1060 palkovsky 131
        /* If the users accepted call, connect */
132
        if (!IPC_GET_RETVAL(answer->data)) {
133
            ipc_phone_connect((phone_t *)IPC_GET_ARG3(*olddata),
134
                      &TASK->answerbox);
135
        }
1359 jermar 136
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_SEND) {
137
        if (!IPC_GET_RETVAL(answer->data)) { /* Accepted, handle as_area receipt */
1413 jermar 138
            ipl_t ipl;
1461 palkovsky 139
            int rc;
1413 jermar 140
            as_t *as;
141
 
142
            ipl = interrupts_disable();
143
            spinlock_lock(&answer->sender->lock);
144
            as = answer->sender->as;
145
            spinlock_unlock(&answer->sender->lock);
146
            interrupts_restore(ipl);
147
 
1461 palkovsky 148
            rc = as_area_share(as, IPC_GET_ARG1(*olddata), IPC_GET_ARG2(*olddata),
149
                       AS, IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata));
150
            IPC_SET_RETVAL(answer->data, rc);
151
            return rc;
1329 palkovsky 152
        }
1428 palkovsky 153
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_RECV) {
154
        if (!IPC_GET_RETVAL(answer->data)) {
155
            ipl_t ipl;
156
            as_t *as;
1434 palkovsky 157
            int rc;
1428 palkovsky 158
 
159
            ipl = interrupts_disable();
160
            spinlock_lock(&answer->sender->lock);
161
            as = answer->sender->as;
162
            spinlock_unlock(&answer->sender->lock);
163
            interrupts_restore(ipl);
164
 
1434 palkovsky 165
            rc = as_area_share(AS, IPC_GET_ARG1(answer->data), IPC_GET_ARG2(*olddata),
1461 palkovsky 166
                       as, IPC_GET_ARG1(*olddata), IPC_GET_ARG2(answer->data));
1434 palkovsky 167
            IPC_SET_RETVAL(answer->data, rc);
1428 palkovsky 168
        }
1027 palkovsky 169
    }
1329 palkovsky 170
    return 0;
1027 palkovsky 171
}
172
 
1090 palkovsky 173
/** Called before the request is sent
174
 *
175
 * @return 0 - no error, -1 - report error to user
176
 */
177
static int request_preprocess(call_t *call)
178
{
179
    int newphid;
1329 palkovsky 180
    size_t size;
1090 palkovsky 181
 
182
    switch (IPC_GET_METHOD(call->data)) {
183
    case IPC_M_CONNECT_ME_TO:
184
        newphid = phone_alloc();
185
        if (newphid < 0)
186
            return ELIMIT;
187
        /* Set arg3 for server */
188
        IPC_SET_ARG3(call->data, (__native)&TASK->phones[newphid]);
189
        call->flags |= IPC_CALL_CONN_ME_TO;
190
        call->private = newphid;
191
        break;
1359 jermar 192
    case IPC_M_AS_AREA_SEND:
1417 jermar 193
        size = as_get_size(IPC_GET_ARG1(call->data));
1329 palkovsky 194
        if (!size) {
195
            return EPERM;
196
        }
1417 jermar 197
        IPC_SET_ARG2(call->data, size);
1329 palkovsky 198
        break;
1090 palkovsky 199
    default:
200
        break;
201
    }
202
    return 0;
203
}
204
 
1027 palkovsky 205
/****************************************************/
206
/* Functions called to process received call/answer
207
 * before passing to uspace
208
 */
209
 
210
/** Do basic kernel processing of received call answer */
1090 palkovsky 211
static void process_answer(call_t *call)
1027 palkovsky 212
{
1088 palkovsky 213
    if (IPC_GET_RETVAL(call->data) == EHANGUP && \
214
        call->flags & IPC_CALL_FORWARDED)
215
        IPC_SET_RETVAL(call->data, EFORWARD);
1090 palkovsky 216
 
217
    if (call->flags & IPC_CALL_CONN_ME_TO) {
218
        if (IPC_GET_RETVAL(call->data))
219
            phone_dealloc(call->private);
220
        else
221
            IPC_SET_ARG3(call->data, call->private);
222
    }
1027 palkovsky 223
}
224
 
225
/** Do basic kernel processing of received call request
226
 *
227
 * @return 0 - the call should be passed to userspace, 1 - ignore call
228
 */
229
static int process_request(answerbox_t *box,call_t *call)
230
{
231
    int phoneid;
232
 
1086 palkovsky 233
    if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) {
1040 palkovsky 234
        phoneid = phone_alloc();
1027 palkovsky 235
        if (phoneid < 0) { /* Failed to allocate phone */
236
            IPC_SET_RETVAL(call->data, ELIMIT);
237
            ipc_answer(box,call);
238
            return -1;
239
        }
240
        IPC_SET_ARG3(call->data, phoneid);
241
    }
242
    return 0;
243
}
244
 
245
/** Send a call over IPC, wait for reply, return to user
246
 *
247
 * @return Call identification, returns -1 on fatal error,
248
           -2 on 'Too many async request, handle answers first
249
 */
250
__native sys_ipc_call_sync_fast(__native phoneid, __native method,
1086 palkovsky 251
                __native arg1, ipc_data_t *data)
1027 palkovsky 252
{
253
    call_t call;
254
    phone_t *phone;
1090 palkovsky 255
    int res;
1027 palkovsky 256
 
1084 palkovsky 257
    GET_CHECK_PHONE(phone, phoneid, return ENOENT);
1027 palkovsky 258
 
1084 palkovsky 259
    ipc_call_static_init(&call);
1027 palkovsky 260
    IPC_SET_METHOD(call.data, method);
261
    IPC_SET_ARG1(call.data, arg1);
262
 
1090 palkovsky 263
    if (!(res=request_preprocess(&call))) {
264
        ipc_call_sync(phone, &call);
265
        process_answer(&call);
266
    } else
267
        IPC_SET_RETVAL(call.data, res);
1086 palkovsky 268
    STRUCT_TO_USPACE(&data->args, &call.data.args);
1027 palkovsky 269
 
270
    return 0;
271
}
272
 
273
/** Synchronous IPC call allowing to send whole message */
1086 palkovsky 274
__native sys_ipc_call_sync(__native phoneid, ipc_data_t *question,
275
               ipc_data_t *reply)
1027 palkovsky 276
{
277
    call_t call;
278
    phone_t *phone;
1090 palkovsky 279
    int res;
1288 jermar 280
    int rc;
1027 palkovsky 281
 
1084 palkovsky 282
    ipc_call_static_init(&call);
1288 jermar 283
    rc = copy_from_uspace(&call.data.args, &question->args, sizeof(call.data.args));
284
    if (rc != 0)
285
        return (__native) rc;
1040 palkovsky 286
 
1084 palkovsky 287
    GET_CHECK_PHONE(phone, phoneid, return ENOENT);
1072 palkovsky 288
 
1090 palkovsky 289
    if (!(res=request_preprocess(&call))) {
290
        ipc_call_sync(phone, &call);
291
        process_answer(&call);
292
    } else
293
        IPC_SET_RETVAL(call.data, res);
1027 palkovsky 294
 
1288 jermar 295
    rc = STRUCT_TO_USPACE(&reply->args, &call.data.args);
296
    if (rc != 0)
297
        return rc;
1027 palkovsky 298
 
299
    return 0;
300
}
301
 
302
/** Check that the task did not exceed allowed limit
303
 *
304
 * @return 0 - Limit OK,   -1 - limit exceeded
305
 */
306
static int check_call_limit(void)
307
{
308
    if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) {
309
        atomic_dec(&TASK->active_calls);
310
        return -1;
311
    }
312
    return 0;
313
}
314
 
315
/** Send an asynchronous call over ipc
316
 *
317
 * @return Call identification, returns -1 on fatal error,
318
           -2 on 'Too many async request, handle answers first
319
 */
320
__native sys_ipc_call_async_fast(__native phoneid, __native method,
321
                 __native arg1, __native arg2)
322
{
323
    call_t *call;
324
    phone_t *phone;
1090 palkovsky 325
    int res;
1027 palkovsky 326
 
327
    if (check_call_limit())
328
        return IPC_CALLRET_TEMPORARY;
329
 
1090 palkovsky 330
    GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
1072 palkovsky 331
 
1258 palkovsky 332
    call = ipc_call_alloc(0);
1027 palkovsky 333
    IPC_SET_METHOD(call->data, method);
334
    IPC_SET_ARG1(call->data, arg1);
335
    IPC_SET_ARG2(call->data, arg2);
1669 palkovsky 336
    IPC_SET_ARG3(call->data, 0);
1027 palkovsky 337
 
1090 palkovsky 338
    if (!(res=request_preprocess(call)))
339
        ipc_call(phone, call);
340
    else
341
        ipc_backsend_err(phone, call, res);
1027 palkovsky 342
 
343
    return (__native) call;
344
}
345
 
346
/** Synchronous IPC call allowing to send whole message
347
 *
348
 * @return The same as sys_ipc_call_async
349
 */
1086 palkovsky 350
__native sys_ipc_call_async(__native phoneid, ipc_data_t *data)
1027 palkovsky 351
{
352
    call_t *call;
353
    phone_t *phone;
1090 palkovsky 354
    int res;
1288 jermar 355
    int rc;
1027 palkovsky 356
 
1072 palkovsky 357
    if (check_call_limit())
358
        return IPC_CALLRET_TEMPORARY;
359
 
1090 palkovsky 360
    GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
1027 palkovsky 361
 
1258 palkovsky 362
    call = ipc_call_alloc(0);
1288 jermar 363
    rc = copy_from_uspace(&call->data.args, &data->args, sizeof(call->data.args));
1293 palkovsky 364
    if (rc != 0) {
365
        ipc_call_free(call);
1288 jermar 366
        return (__native) rc;
1293 palkovsky 367
    }
1090 palkovsky 368
    if (!(res=request_preprocess(call)))
369
        ipc_call(phone, call);
370
    else
371
        ipc_backsend_err(phone, call, res);
1040 palkovsky 372
 
1027 palkovsky 373
    return (__native) call;
374
}
375
 
1040 palkovsky 376
/** Forward received call to another destination
377
 *
378
 * The arg1 and arg2 are changed in the forwarded message
1060 palkovsky 379
 *
380
 * Warning: If implementing non-fast version, make sure that
381
 *          arg3 is not rewritten for certain system IPC
1040 palkovsky 382
 */
383
__native sys_ipc_forward_fast(__native callid, __native phoneid,
384
                  __native method, __native arg1)
385
{
386
    call_t *call;
387
    phone_t *phone;
388
 
389
    call = get_call(callid);
390
    if (!call)
391
        return ENOENT;
392
 
1088 palkovsky 393
    call->flags |= IPC_CALL_FORWARDED;
394
 
1084 palkovsky 395
    GET_CHECK_PHONE(phone, phoneid, {
1040 palkovsky 396
        IPC_SET_RETVAL(call->data, EFORWARD);
397
        ipc_answer(&TASK->answerbox, call);
398
        return ENOENT;
1084 palkovsky 399
    });    
1040 palkovsky 400
 
401
    if (!is_forwardable(IPC_GET_METHOD(call->data))) {
402
        IPC_SET_RETVAL(call->data, EFORWARD);
403
        ipc_answer(&TASK->answerbox, call);
404
        return EPERM;
405
    }
406
 
407
    /* Userspace is not allowed to change method of system methods
408
     * on forward, allow changing ARG1 and ARG2 by means of method and arg1
409
     */
410
    if (is_system_method(IPC_GET_METHOD(call->data))) {
1090 palkovsky 411
        if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)
412
            phone_dealloc(IPC_GET_ARG3(call->data));
413
 
1040 palkovsky 414
        IPC_SET_ARG1(call->data, method);
415
        IPC_SET_ARG2(call->data, arg1);
416
    } else {
417
        IPC_SET_METHOD(call->data, method);
418
        IPC_SET_ARG1(call->data, arg1);
419
    }
420
 
1088 palkovsky 421
    return ipc_forward(call, phone, &TASK->answerbox);
1040 palkovsky 422
}
423
 
1027 palkovsky 424
/** Send IPC answer */
425
__native sys_ipc_answer_fast(__native callid, __native retval,
426
                 __native arg1, __native arg2)
427
{
428
    call_t *call;
1040 palkovsky 429
    ipc_data_t saved_data;
1088 palkovsky 430
    int saveddata = 0;
1329 palkovsky 431
    int rc;
1027 palkovsky 432
 
1346 palkovsky 433
    /* Do not answer notification callids */
434
    if (callid & IPC_CALLID_NOTIFICATION)
435
        return 0;
436
 
1040 palkovsky 437
    call = get_call(callid);
438
    if (!call)
439
        return ENOENT;
1027 palkovsky 440
 
1088 palkovsky 441
    if (answer_need_old(call)) {
1040 palkovsky 442
        memcpy(&saved_data, &call->data, sizeof(call->data));
1088 palkovsky 443
        saveddata = 1;
1027 palkovsky 444
    }
445
 
446
    IPC_SET_RETVAL(call->data, retval);
447
    IPC_SET_ARG1(call->data, arg1);
448
    IPC_SET_ARG2(call->data, arg2);
1329 palkovsky 449
    rc = answer_preprocess(call, saveddata ? &saved_data : NULL);
1040 palkovsky 450
 
1027 palkovsky 451
    ipc_answer(&TASK->answerbox, call);
1329 palkovsky 452
    return rc;
1027 palkovsky 453
}
454
 
455
/** Send IPC answer */
1086 palkovsky 456
__native sys_ipc_answer(__native callid, ipc_data_t *data)
1027 palkovsky 457
{
458
    call_t *call;
1040 palkovsky 459
    ipc_data_t saved_data;
1088 palkovsky 460
    int saveddata = 0;
1288 jermar 461
    int rc;
1027 palkovsky 462
 
1346 palkovsky 463
    /* Do not answer notification callids */
464
    if (callid & IPC_CALLID_NOTIFICATION)
465
        return 0;
466
 
1040 palkovsky 467
    call = get_call(callid);
468
    if (!call)
469
        return ENOENT;
1027 palkovsky 470
 
1088 palkovsky 471
    if (answer_need_old(call)) {
1040 palkovsky 472
        memcpy(&saved_data, &call->data, sizeof(call->data));
1088 palkovsky 473
        saveddata = 1;
1027 palkovsky 474
    }
1288 jermar 475
    rc = copy_from_uspace(&call->data.args, &data->args,
1086 palkovsky 476
             sizeof(call->data.args));
1288 jermar 477
    if (rc != 0)
478
        return rc;
1027 palkovsky 479
 
1329 palkovsky 480
    rc = answer_preprocess(call, saveddata ? &saved_data : NULL);
1027 palkovsky 481
 
482
    ipc_answer(&TASK->answerbox, call);
483
 
1329 palkovsky 484
    return rc;
1027 palkovsky 485
}
486
 
1086 palkovsky 487
/** Hang up the phone
488
 *
489
 */
490
__native sys_ipc_hangup(int phoneid)
491
{
492
    phone_t *phone;
493
 
494
    GET_CHECK_PHONE(phone, phoneid, return ENOENT);
495
 
1591 palkovsky 496
    if (ipc_phone_hangup(phone))
1086 palkovsky 497
        return -1;
498
 
499
    return 0;
500
}
501
 
1027 palkovsky 502
/** Wait for incoming ipc call or answer
503
 *
1086 palkovsky 504
 * @param calldata Pointer to buffer where the call/answer data is stored
1364 jermar 505
 * @param usec Timeout. See waitq_sleep_timeout() for explanation.
1502 jermar 506
 * @param flags Select mode of sleep operation. See waitq_sleep_timeout() for explanation.
1364 jermar 507
 *
1027 palkovsky 508
 * @return Callid, if callid & 1, then the call is answer
509
 */
1502 jermar 510
__native sys_ipc_wait_for_call(ipc_data_t *calldata, __u32 usec, int flags)
1027 palkovsky 511
{
512
    call_t *call;
513
 
514
restart:   
1502 jermar 515
    call = ipc_wait_for_call(&TASK->answerbox, usec, flags | SYNCH_FLAGS_INTERRUPTIBLE);
1088 palkovsky 516
    if (!call)
517
        return 0;
1027 palkovsky 518
 
1258 palkovsky 519
    if (call->flags & IPC_CALL_NOTIF) {
520
        ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC));
1693 palkovsky 521
 
522
        /* Set in_phone_hash to the interrupt counter */
523
        call->data.phone = (void *)call->private;
524
 
525
        STRUCT_TO_USPACE(calldata, &call->data);
526
 
1258 palkovsky 527
        ipc_call_free(call);
528
 
529
        return ((__native)call) | IPC_CALLID_NOTIFICATION;
530
    }
531
 
1027 palkovsky 532
    if (call->flags & IPC_CALL_ANSWERED) {
1090 palkovsky 533
        process_answer(call);
1027 palkovsky 534
 
1086 palkovsky 535
        ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC));
536
 
1027 palkovsky 537
        atomic_dec(&TASK->active_calls);
1086 palkovsky 538
 
539
        if (call->flags & IPC_CALL_DISCARD_ANSWER) {
540
            ipc_call_free(call);
541
            goto restart;
542
        }
543
 
544
        STRUCT_TO_USPACE(&calldata->args, &call->data.args);
1027 palkovsky 545
        ipc_call_free(call);
546
 
547
        return ((__native)call) | IPC_CALLID_ANSWERED;
548
    }
1086 palkovsky 549
 
1027 palkovsky 550
    if (process_request(&TASK->answerbox, call))
551
        goto restart;
1086 palkovsky 552
 
1090 palkovsky 553
    /* Include phone address('id') of the caller in the request,
554
     * copy whole call->data, not only call->data.args */
1396 palkovsky 555
    if (STRUCT_TO_USPACE(calldata, &call->data)) {
556
        return 0;
557
    }
1027 palkovsky 558
    return (__native)call;
559
}
1258 palkovsky 560
 
561
/** Connect irq handler to task */
1595 palkovsky 562
__native sys_ipc_register_irq(int irq, irq_code_t *ucode)
1258 palkovsky 563
{
1297 jermar 564
    if (!(cap_get(TASK) & CAP_IRQ_REG))
565
        return EPERM;
566
 
1595 palkovsky 567
    if (irq >= IRQ_COUNT || irq <= -IPC_IRQ_RESERVED_VIRTUAL)
1297 jermar 568
        return (__native) ELIMIT;
1595 palkovsky 569
 
1258 palkovsky 570
    irq_ipc_bind_arch(irq);
1281 palkovsky 571
 
572
    return ipc_irq_register(&TASK->answerbox, irq, ucode);
1258 palkovsky 573
}
574
 
575
/* Disconnect irq handler from task */
1595 palkovsky 576
__native sys_ipc_unregister_irq(int irq)
1258 palkovsky 577
{
1297 jermar 578
    if (!(cap_get(TASK) & CAP_IRQ_REG))
579
        return EPERM;
580
 
1595 palkovsky 581
    if (irq >= IRQ_COUNT || irq <= -IPC_IRQ_RESERVED_VIRTUAL)
1297 jermar 582
        return (__native) ELIMIT;
1258 palkovsky 583
 
584
    ipc_irq_unregister(&TASK->answerbox, irq);
585
 
586
    return 0;
587
}