2 * Copyright (c) 2006 Ondrej Palkovsky
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
29 /** @addtogroup genericipc
40 #include <abi/ipc/methods.h>
41 #include <ipc/sysipc.h>
42 #include <ipc/sysipc_ops.h>
43 #include <ipc/sysipc_priv.h>
45 #include <ipc/ipcrsc.h>
46 #include <ipc/event.h>
48 #include <synch/waitq.h>
49 #include <arch/interrupt.h>
50 #include <syscall/copy.h>
51 #include <security/perm.h>
52 #include <console/console.h>
57 #define STRUCT_TO_USPACE(dst, src) copy_to_uspace((dst), (src), sizeof(*(src)))
59 /** Decide if the interface and method is a system method.
61 * @param imethod Interface and method to be decided.
63 * @return True if the interface and method is a system
64 * interface and method.
67 static inline bool method_is_system(sysarg_t imethod
)
69 if (imethod
<= IPC_M_LAST_SYSTEM
)
75 /** Decide if the message with this interface and method is forwardable.
77 * Some system messages may be forwarded, for some of them
80 * @param imethod Interface and method to be decided.
82 * @return True if the interface and method is forwardable.
85 static inline bool method_is_forwardable(sysarg_t imethod
)
88 case IPC_M_PHONE_HUNGUP
:
89 /* This message is meant only for the original recipient. */
96 /** Decide if the message with this interface and method is immutable on forward.
98 * Some system messages may be forwarded but their content cannot be altered.
100 * @param imethod Interface and method to be decided.
102 * @return True if the interface and method is immutable on forward.
105 static inline bool method_is_immutable(sysarg_t imethod
)
109 case IPC_M_SHARE_OUT
:
111 case IPC_M_DATA_WRITE
:
112 case IPC_M_DATA_READ
:
113 case IPC_M_STATE_CHANGE_AUTHORIZE
:
122 * Functions that preprocess answer before sending it to the recepient.
125 /** Decide if the caller (e.g. ipc_answer()) should save the old call contents
126 * for answer_preprocess().
128 * @param call Call structure to be decided.
130 * @return true if the old call contents should be saved.
133 static inline bool answer_need_old(call_t
*call
)
135 switch (IPC_GET_IMETHOD(call
->data
)) {
136 case IPC_M_CONNECT_TO_ME
:
137 case IPC_M_CONNECT_ME_TO
:
139 case IPC_M_SHARE_OUT
:
141 case IPC_M_DATA_WRITE
:
142 case IPC_M_DATA_READ
:
143 case IPC_M_STATE_CHANGE_AUTHORIZE
:
150 /** Interpret process answer as control information.
152 * This function is called directly after sys_ipc_answer().
154 * @param answer Call structure with the answer.
155 * @param olddata Saved data of the request.
157 * @return Return EOK on success or an error code.
160 errno_t
answer_preprocess(call_t
*answer
, ipc_data_t
*olddata
)
164 spinlock_lock(&answer
->forget_lock
);
165 if (answer
->forget
) {
167 * This is a forgotten call and answer->sender is not valid.
169 spinlock_unlock(&answer
->forget_lock
);
171 SYSIPC_OP(answer_cleanup
, answer
, olddata
);
174 assert(answer
->active
);
177 * Mark the call as inactive to prevent _ipc_answer_free_call()
178 * from attempting to remove the call from the active list
181 answer
->active
= false;
184 * Remove the call from the sender's active call list.
185 * We enforce this locking order so that any potential
186 * concurrently executing forget operation is forced to
187 * release its active_calls_lock and lose the race to
188 * forget this soon to be answered call.
190 spinlock_lock(&answer
->sender
->active_calls_lock
);
191 list_remove(&answer
->ta_link
);
192 spinlock_unlock(&answer
->sender
->active_calls_lock
);
194 spinlock_unlock(&answer
->forget_lock
);
196 if ((errno_t
) IPC_GET_RETVAL(answer
->data
) == EHANGUP
) {
197 phone_t
*phone
= answer
->caller_phone
;
198 mutex_lock(&phone
->lock
);
199 if (phone
->state
== IPC_PHONE_CONNECTED
) {
200 irq_spinlock_lock(&phone
->callee
->lock
, true);
201 list_remove(&phone
->link
);
202 /* Drop callee->connected_phones reference */
203 kobject_put(phone
->kobject
);
204 phone
->state
= IPC_PHONE_SLAMMED
;
205 irq_spinlock_unlock(&phone
->callee
->lock
, true);
207 mutex_unlock(&phone
->lock
);
213 return SYSIPC_OP(answer_preprocess
, answer
, olddata
);
216 /** Called before the request is sent.
218 * @param call Call structure with the request.
219 * @param phone Phone that the call will be sent through.
221 * @return Return 0 on success, ELIMIT or EPERM on error.
224 static errno_t
request_preprocess(call_t
*call
, phone_t
*phone
)
226 call
->request_method
= IPC_GET_IMETHOD(call
->data
);
227 return SYSIPC_OP(request_preprocess
, call
, phone
);
231 * Functions called to process received call/answer before passing it to uspace.
234 /** Do basic kernel processing of received call answer.
236 * @param call Call structure with the answer.
239 static void process_answer(call_t
*call
)
241 if (((errno_t
) IPC_GET_RETVAL(call
->data
) == EHANGUP
) &&
242 (call
->flags
& IPC_CALL_FORWARDED
))
243 IPC_SET_RETVAL(call
->data
, EFORWARD
);
245 SYSIPC_OP(answer_process
, call
);
249 /** Do basic kernel processing of received call request.
251 * @param box Destination answerbox structure.
252 * @param call Call structure with the request.
254 * @return 0 if the call should be passed to userspace.
255 * @return -1 if the call should be ignored.
258 static int process_request(answerbox_t
*box
, call_t
*call
)
260 return SYSIPC_OP(request_process
, call
, box
);
263 /** Make a call over IPC and wait for reply.
265 * @param handle Phone capability handle for the call.
266 * @param data[inout] Structure with request/reply data.
267 * @param priv Value to be stored in call->priv.
269 * @return EOK on success.
270 * @return ENOENT if there is no such phone handle.
274 ipc_req_internal(cap_phone_handle_t handle
, ipc_data_t
*data
, sysarg_t priv
)
276 kobject_t
*kobj
= kobject_get(TASK
, handle
, KOBJECT_TYPE_PHONE
);
280 call_t
*call
= ipc_call_alloc(0);
282 memcpy(call
->data
.args
, data
->args
, sizeof(data
->args
));
284 errno_t rc
= request_preprocess(call
, kobj
->phone
);
287 udebug_stoppable_begin();
290 kobject_add_ref(call
->kobject
);
291 rc
= ipc_call_sync(kobj
->phone
, call
);
292 spinlock_lock(&call
->forget_lock
);
293 bool forgotten
= call
->forget
;
294 spinlock_unlock(&call
->forget_lock
);
295 kobject_put(call
->kobject
);
298 udebug_stoppable_end();
304 * There was an error, but it did not result
305 * in the call being forgotten. In fact, the
306 * call was not even sent. We are still
307 * its owners and are responsible for its
310 kobject_put(call
->kobject
);
313 * The call was forgotten and it changed hands.
314 * We are no longer expected to free it.
322 process_answer(call
);
324 IPC_SET_RETVAL(call
->data
, rc
);
326 memcpy(data
->args
, call
->data
.args
, sizeof(data
->args
));
327 kobject_put(call
->kobject
);
333 /** Check that the task did not exceed the allowed limit of asynchronous calls
336 * @param phone Phone to check the limit against.
338 * @return 0 if limit not reached or -1 if limit exceeded.
341 static int check_call_limit(phone_t
*phone
)
343 if (atomic_get(&phone
->active_calls
) >= IPC_MAX_ASYNC_CALLS
)
349 /** Make a fast asynchronous call over IPC.
351 * This function can only handle three arguments of payload, but is faster than
352 * the generic function sys_ipc_call_async_slow().
354 * @param handle Phone capability handle for the call.
355 * @param imethod Interface and method of the call.
356 * @param arg1 Service-defined payload argument.
357 * @param arg2 Service-defined payload argument.
358 * @param arg3 Service-defined payload argument.
359 * @param label User-defined label.
361 * @return EOK on success.
362 * @return An error code on error.
365 sys_errno_t
sys_ipc_call_async_fast(cap_phone_handle_t handle
, sysarg_t imethod
,
366 sysarg_t arg1
, sysarg_t arg2
, sysarg_t arg3
, sysarg_t label
)
368 kobject_t
*kobj
= kobject_get(TASK
, handle
, KOBJECT_TYPE_PHONE
);
372 if (check_call_limit(kobj
->phone
)) {
377 call_t
*call
= ipc_call_alloc(0);
378 IPC_SET_IMETHOD(call
->data
, imethod
);
379 IPC_SET_ARG1(call
->data
, arg1
);
380 IPC_SET_ARG2(call
->data
, arg2
);
381 IPC_SET_ARG3(call
->data
, arg3
);
384 * To achieve deterministic behavior, zero out arguments that are beyond
385 * the limits of the fast version.
387 IPC_SET_ARG5(call
->data
, 0);
389 /* Set the user-defined label */
390 call
->data
.label
= label
;
392 errno_t res
= request_preprocess(call
, kobj
->phone
);
395 ipc_call(kobj
->phone
, call
);
397 ipc_backsend_err(kobj
->phone
, call
, res
);
403 /** Make an asynchronous IPC call allowing to transmit the entire payload.
405 * @param handle Phone capability for the call.
406 * @param data Userspace address of call data with the request.
407 * @param label User-defined label.
409 * @return See sys_ipc_call_async_fast().
412 sys_errno_t
sys_ipc_call_async_slow(cap_phone_handle_t handle
, ipc_data_t
*data
,
415 kobject_t
*kobj
= kobject_get(TASK
, handle
, KOBJECT_TYPE_PHONE
);
419 if (check_call_limit(kobj
->phone
)) {
424 call_t
*call
= ipc_call_alloc(0);
425 errno_t rc
= copy_from_uspace(&call
->data
.args
, &data
->args
,
426 sizeof(call
->data
.args
));
428 kobject_put(call
->kobject
);
430 return (sys_errno_t
) rc
;
433 /* Set the user-defined label */
434 call
->data
.label
= label
;
436 errno_t res
= request_preprocess(call
, kobj
->phone
);
439 ipc_call(kobj
->phone
, call
);
441 ipc_backsend_err(kobj
->phone
, call
, res
);
447 /** Forward a received call to another destination
449 * Common code for both the fast and the slow version.
451 * @param chandle Call handle of the forwarded call.
452 * @param phandle Phone handle to use for forwarding.
453 * @param imethod New interface and method to use for the forwarded call.
454 * @param arg1 New value of the first argument for the forwarded call.
455 * @param arg2 New value of the second argument for the forwarded call.
456 * @param arg3 New value of the third argument for the forwarded call.
457 * @param arg4 New value of the fourth argument for the forwarded call.
458 * @param arg5 New value of the fifth argument for the forwarded call.
459 * @param mode Flags that specify mode of the forward operation.
460 * @param slow If true, arg3, arg4 and arg5 are considered. Otherwise
461 * the function considers only the fast version arguments:
462 * i.e. arg1 and arg2.
464 * @return 0 on succes, otherwise an error code.
466 * Warning: Make sure that ARG5 is not rewritten for certain system IPC
469 static sys_errno_t
sys_ipc_forward_common(cap_call_handle_t chandle
,
470 cap_phone_handle_t phandle
, sysarg_t imethod
, sysarg_t arg1
, sysarg_t arg2
,
471 sysarg_t arg3
, sysarg_t arg4
, sysarg_t arg5
, unsigned int mode
, bool slow
)
473 kobject_t
*ckobj
= cap_unpublish(TASK
, chandle
, KOBJECT_TYPE_CALL
);
477 call_t
*call
= ckobj
->call
;
480 bool need_old
= answer_need_old(call
);
484 bool after_forward
= false;
487 kobject_t
*pkobj
= kobject_get(TASK
, phandle
, KOBJECT_TYPE_PHONE
);
493 if (!method_is_forwardable(IPC_GET_IMETHOD(call
->data
))) {
498 call
->flags
|= IPC_CALL_FORWARDED
;
501 * User space is not allowed to change interface and method of system
502 * methods on forward, allow changing ARG1, ARG2, ARG3 and ARG4 by
503 * means of imethod, arg1, arg2 and arg3.
504 * If the interface and method is immutable, don't change anything.
506 if (!method_is_immutable(IPC_GET_IMETHOD(call
->data
))) {
507 if (method_is_system(IPC_GET_IMETHOD(call
->data
))) {
508 if (IPC_GET_IMETHOD(call
->data
) == IPC_M_CONNECT_TO_ME
)
509 phone_dealloc((cap_phone_handle_t
)
510 IPC_GET_ARG5(call
->data
));
512 IPC_SET_ARG1(call
->data
, imethod
);
513 IPC_SET_ARG2(call
->data
, arg1
);
514 IPC_SET_ARG3(call
->data
, arg2
);
517 IPC_SET_ARG4(call
->data
, arg3
);
520 * For system methods we deliberately don't
524 IPC_SET_IMETHOD(call
->data
, imethod
);
525 IPC_SET_ARG1(call
->data
, arg1
);
526 IPC_SET_ARG2(call
->data
, arg2
);
528 IPC_SET_ARG3(call
->data
, arg3
);
529 IPC_SET_ARG4(call
->data
, arg4
);
530 IPC_SET_ARG5(call
->data
, arg5
);
535 rc
= ipc_forward(call
, pkobj
->phone
, &TASK
->answerbox
, mode
);
537 after_forward
= true;
541 cap_free(TASK
, chandle
);
547 IPC_SET_RETVAL(call
->data
, EFORWARD
);
548 (void) answer_preprocess(call
, need_old
? &old
: NULL
);
550 _ipc_answer_free_call(call
, false);
552 ipc_answer(&TASK
->answerbox
, call
);
554 cap_free(TASK
, chandle
);
562 /** Forward a received call to another destination - fast version.
564 * In case the original interface and method is a system method, ARG1, ARG2
565 * and ARG3 are overwritten in the forwarded message with the new method and
566 * the new arg1 and arg2, respectively. Otherwise the IMETHOD, ARG1 and ARG2
567 * are rewritten with the new interface and method, arg1 and arg2, respectively.
568 * Also note there is a set of immutable methods, for which the new method and
569 * arguments are not set and these values are ignored.
571 * @param chandle Call handle of the call to forward.
572 * @param phandle Phone handle to use for forwarding.
573 * @param imethod New interface and method to use for the forwarded call.
574 * @param arg1 New value of the first argument for the forwarded call.
575 * @param arg2 New value of the second argument for the forwarded call.
576 * @param mode Flags that specify mode of the forward operation.
578 * @return 0 on succes, otherwise an error code.
581 sys_errno_t
sys_ipc_forward_fast(cap_call_handle_t chandle
,
582 cap_phone_handle_t phandle
, sysarg_t imethod
, sysarg_t arg1
, sysarg_t arg2
,
585 return sys_ipc_forward_common(chandle
, phandle
, imethod
, arg1
, arg2
, 0,
589 /** Forward a received call to another destination - slow version.
591 * This function is the slow verision of the sys_ipc_forward_fast interface.
592 * It can copy all five new arguments and the new interface and method from
593 * the userspace. It naturally extends the functionality of the fast version.
594 * For system methods, it additionally stores the new value of arg3 to ARG4.
595 * For non-system methods, it additionally stores the new value of arg3, arg4
596 * and arg5, respectively, to ARG3, ARG4 and ARG5, respectively.
598 * @param chandle Call handle of the call to forward.
599 * @param phandle Phone handle to use for forwarding.
600 * @param data Userspace address of the new IPC data.
601 * @param mode Flags that specify mode of the forward operation.
603 * @return 0 on succes, otherwise an error code.
606 sys_errno_t
sys_ipc_forward_slow(cap_call_handle_t chandle
,
607 cap_phone_handle_t phandle
, ipc_data_t
*data
, unsigned int mode
)
610 errno_t rc
= copy_from_uspace(&newdata
.args
, &data
->args
,
611 sizeof(newdata
.args
));
613 return (sys_errno_t
) rc
;
615 return sys_ipc_forward_common(chandle
, phandle
,
616 IPC_GET_IMETHOD(newdata
), IPC_GET_ARG1(newdata
),
617 IPC_GET_ARG2(newdata
), IPC_GET_ARG3(newdata
),
618 IPC_GET_ARG4(newdata
), IPC_GET_ARG5(newdata
), mode
, true);
621 /** Answer an IPC call - fast version.
623 * This function can handle only two return arguments of payload, but is faster
624 * than the generic sys_ipc_answer().
626 * @param chandle Call handle to be answered.
627 * @param retval Return value of the answer.
628 * @param arg1 Service-defined return value.
629 * @param arg2 Service-defined return value.
630 * @param arg3 Service-defined return value.
631 * @param arg4 Service-defined return value.
633 * @return 0 on success, otherwise an error code.
636 sys_errno_t
sys_ipc_answer_fast(cap_call_handle_t chandle
, sysarg_t retval
,
637 sysarg_t arg1
, sysarg_t arg2
, sysarg_t arg3
, sysarg_t arg4
)
639 kobject_t
*kobj
= cap_unpublish(TASK
, chandle
, KOBJECT_TYPE_CALL
);
643 call_t
*call
= kobj
->call
;
644 assert(!(call
->flags
& IPC_CALL_ANSWERED
));
646 ipc_data_t saved_data
;
649 if (answer_need_old(call
)) {
650 memcpy(&saved_data
, &call
->data
, sizeof(call
->data
));
655 IPC_SET_RETVAL(call
->data
, retval
);
656 IPC_SET_ARG1(call
->data
, arg1
);
657 IPC_SET_ARG2(call
->data
, arg2
);
658 IPC_SET_ARG3(call
->data
, arg3
);
659 IPC_SET_ARG4(call
->data
, arg4
);
662 * To achieve deterministic behavior, zero out arguments that are beyond
663 * the limits of the fast version.
665 IPC_SET_ARG5(call
->data
, 0);
666 errno_t rc
= answer_preprocess(call
, saved
? &saved_data
: NULL
);
668 ipc_answer(&TASK
->answerbox
, call
);
671 cap_free(TASK
, chandle
);
676 /** Answer an IPC call.
678 * @param chandle Call handle to be answered.
679 * @param data Userspace address of call data with the answer.
681 * @return 0 on success, otherwise an error code.
684 sys_errno_t
sys_ipc_answer_slow(cap_call_handle_t chandle
, ipc_data_t
*data
)
686 kobject_t
*kobj
= cap_unpublish(TASK
, chandle
, KOBJECT_TYPE_CALL
);
690 call_t
*call
= kobj
->call
;
691 assert(!(call
->flags
& IPC_CALL_ANSWERED
));
693 ipc_data_t saved_data
;
696 if (answer_need_old(call
)) {
697 memcpy(&saved_data
, &call
->data
, sizeof(call
->data
));
702 errno_t rc
= copy_from_uspace(&call
->data
.args
, &data
->args
,
703 sizeof(call
->data
.args
));
706 * Republish the capability so that the call does not get lost.
708 cap_publish(TASK
, chandle
, kobj
);
712 rc
= answer_preprocess(call
, saved
? &saved_data
: NULL
);
714 ipc_answer(&TASK
->answerbox
, call
);
717 cap_free(TASK
, chandle
);
724 * @param handle Phone capability handle of the phone to be hung up.
726 * @return 0 on success or an error code.
729 sys_errno_t
sys_ipc_hangup(cap_phone_handle_t handle
)
731 kobject_t
*kobj
= cap_unpublish(TASK
, handle
, KOBJECT_TYPE_PHONE
);
735 errno_t rc
= ipc_phone_hangup(kobj
->phone
);
737 cap_free(TASK
, handle
);
741 /** Wait for an incoming IPC call or an answer.
743 * @param calldata Pointer to buffer where the call/answer data is stored.
744 * @param usec Timeout. See waitq_sleep_timeout() for explanation.
745 * @param flags Select mode of sleep operation. See waitq_sleep_timeout()
748 * @return An error code on error.
750 sys_errno_t
sys_ipc_wait_for_call(ipc_data_t
*calldata
, uint32_t usec
,
758 udebug_stoppable_begin();
761 call
= ipc_wait_for_call(&TASK
->answerbox
, usec
,
762 flags
| SYNCH_FLAGS_INTERRUPTIBLE
);
765 udebug_stoppable_end();
769 ipc_data_t data
= { };
770 data
.cap_handle
= CAP_NIL
;
771 STRUCT_TO_USPACE(calldata
, &data
);
775 call
->data
.flags
= call
->flags
;
776 if (call
->flags
& IPC_CALL_NOTIF
) {
777 /* Set in_phone_hash to the interrupt counter */
778 call
->data
.phone
= (void *) call
->priv
;
780 call
->data
.cap_handle
= CAP_NIL
;
782 STRUCT_TO_USPACE(calldata
, &call
->data
);
783 kobject_put(call
->kobject
);
788 if (call
->flags
& IPC_CALL_ANSWERED
) {
789 process_answer(call
);
791 if (call
->flags
& IPC_CALL_DISCARD_ANSWER
) {
792 kobject_put(call
->kobject
);
796 call
->data
.cap_handle
= CAP_NIL
;
798 STRUCT_TO_USPACE(calldata
, &call
->data
);
799 kobject_put(call
->kobject
);
804 if (process_request(&TASK
->answerbox
, call
))
807 cap_handle_t handle
= CAP_NIL
;
808 errno_t rc
= cap_alloc(TASK
, &handle
);
813 call
->data
.cap_handle
= handle
;
816 * Include phone hash of the caller in the request, copy the whole
817 * call->data, not only call->data.args.
819 rc
= STRUCT_TO_USPACE(calldata
, &call
->data
);
823 kobject_add_ref(call
->kobject
);
824 cap_publish(TASK
, handle
, call
->kobject
);
828 if (CAP_HANDLE_VALID(handle
))
829 cap_free(TASK
, handle
);
832 * The callee will not receive this call and no one else has a chance to
833 * answer it. Set the IPC_CALL_AUTO_REPLY flag and return the EPARTY
836 ipc_data_t saved_data
;
839 if (answer_need_old(call
)) {
840 memcpy(&saved_data
, &call
->data
, sizeof(call
->data
));
845 IPC_SET_RETVAL(call
->data
, EPARTY
);
846 (void) answer_preprocess(call
, saved
? &saved_data
: NULL
);
847 call
->flags
|= IPC_CALL_AUTO_REPLY
;
848 ipc_answer(&TASK
->answerbox
, call
);
853 /** Interrupt one thread from sys_ipc_wait_for_call().
856 sys_errno_t
sys_ipc_poke(void)
858 waitq_wakeup(&TASK
->answerbox
.wq
, WAKEUP_FIRST
);
862 /** Connect an IRQ handler to a task.
864 * @param inr IRQ number.
865 * @param imethod Interface and method to be associated with the notification.
866 * @param ucode Uspace pointer to the top-half pseudocode.
868 * @param[out] uspace_handle Uspace pointer to IRQ capability handle
871 * @return Error code returned by ipc_irq_subscribe().
874 sys_errno_t
sys_ipc_irq_subscribe(inr_t inr
, sysarg_t imethod
,
875 irq_code_t
*ucode
, cap_irq_handle_t
*uspace_handle
)
877 if (!(perm_get(TASK
) & PERM_IRQ_REG
))
880 return ipc_irq_subscribe(&TASK
->answerbox
, inr
, imethod
, ucode
, uspace_handle
);
883 /** Disconnect an IRQ handler from a task.
885 * @param handle IRQ capability handle.
887 * @return Zero on success or EPERM on error.
890 sys_errno_t
sys_ipc_irq_unsubscribe(cap_irq_handle_t handle
)
892 if (!(perm_get(TASK
) & PERM_IRQ_REG
))
895 ipc_irq_unsubscribe(&TASK
->answerbox
, handle
);
900 /** Syscall connect to a task by ID
902 * @return Error code.
905 sys_errno_t
sys_ipc_connect_kbox(task_id_t
*uspace_taskid
,
906 cap_phone_handle_t
*uspace_phone
)
910 cap_phone_handle_t phone
;
912 errno_t rc
= copy_from_uspace(&taskid
, uspace_taskid
, sizeof(task_id_t
));
914 rc
= ipc_connect_kbox((task_id_t
) taskid
, &phone
);
918 rc
= copy_to_uspace(uspace_phone
, &phone
, sizeof(cap_handle_t
));
920 // Clean up the phone on failure.
921 sys_ipc_hangup(phone
);
925 return (sys_errno_t
) rc
;
927 return (sys_errno_t
) ENOTSUP
;