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  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. /** @addtogroup genericipc
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. /* Lock ordering
  36.  *
  37.  * First the answerbox, then the phone.
  38.  */
  39.  
  40. #include <synch/synch.h>
  41. #include <synch/spinlock.h>
  42. #include <synch/mutex.h>
  43. #include <synch/waitq.h>
  44. #include <synch/synch.h>
  45. #include <ipc/ipc.h>
  46. #include <errno.h>
  47. #include <mm/slab.h>
  48. #include <arch.h>
  49. #include <proc/task.h>
  50. #include <memstr.h>
  51. #include <debug.h>
  52.  
  53. #include <print.h>
  54. #include <proc/thread.h>
  55. #include <arch/interrupt.h>
  56. #include <ipc/irq.h>
  57.  
  58. /** Open channel that is assigned automatically to new tasks */
  59. answerbox_t *ipc_phone_0 = NULL;
  60.  
  61. static slab_cache_t *ipc_call_slab;
  62.  
  63. /** Initialize a call structure.
  64.  *
  65.  * @param call      Call structure to be initialized.
  66.  */
  67. static void _ipc_call_init(call_t *call)
  68. {
  69.     memsetb(call, sizeof(*call), 0);
  70.     call->callerbox = &TASK->answerbox;
  71.     call->sender = TASK;
  72.     call->buffer = NULL;
  73. }
  74.  
  75. /** Allocate and initialize a call structure.
  76.  *
  77.  * The call is initialized, so that the reply will be directed to
  78.  * TASK->answerbox.
  79.  *
  80.  * @param flags     Parameters for slab_alloc (e.g FRAME_ATOMIC).
  81.  *
  82.  * @return      If flags permit it, return NULL, or initialized kernel
  83.  *          call structure.
  84.  */
  85. call_t *ipc_call_alloc(int flags)
  86. {
  87.     call_t *call;
  88.  
  89.     call = slab_alloc(ipc_call_slab, flags);
  90.     if (call)
  91.         _ipc_call_init(call);
  92.  
  93.     return call;
  94. }
  95.  
  96. /** Initialize a statically allocated call structure.
  97.  *
  98.  * @param call      Statically allocated kernel call structure to be
  99.  *          initialized.
  100.  */
  101. void ipc_call_static_init(call_t *call)
  102. {
  103.     _ipc_call_init(call);
  104.     call->flags |= IPC_CALL_STATIC_ALLOC;
  105. }
  106.  
  107. /** Deallocate a call structure.
  108.  *
  109.  * @param call      Call structure to be freed.
  110.  */
  111. void ipc_call_free(call_t *call)
  112. {
  113.     ASSERT(!(call->flags & IPC_CALL_STATIC_ALLOC));
  114.     /* Check to see if we have data in the IPC_M_DATA_SEND buffer. */
  115.     if (call->buffer)
  116.         free(call->buffer);
  117.     slab_free(ipc_call_slab, call);
  118. }
  119.  
  120. /** Initialize an answerbox structure.
  121.  *
  122.  * @param box       Answerbox structure to be initialized.
  123.  * @param task      Task to which the answerbox belongs.
  124.  */
  125. void ipc_answerbox_init(answerbox_t *box, task_t *task)
  126. {
  127.     spinlock_initialize(&box->lock, "ipc_box_lock");
  128.     spinlock_initialize(&box->irq_lock, "ipc_box_irqlock");
  129.     waitq_initialize(&box->wq);
  130.     list_initialize(&box->connected_phones);
  131.     list_initialize(&box->calls);
  132.     list_initialize(&box->dispatched_calls);
  133.     list_initialize(&box->answers);
  134.     list_initialize(&box->irq_notifs);
  135.     list_initialize(&box->irq_head);
  136.     box->task = task;
  137. }
  138.  
  139. /** Connect a phone to an answerbox.
  140.  *
  141.  * @param phone     Initialized phone structure.
  142.  * @param box       Initialized answerbox structure.
  143.  */
  144. void ipc_phone_connect(phone_t *phone, answerbox_t *box)
  145. {
  146.     mutex_lock(&phone->lock);
  147.  
  148.     phone->state = IPC_PHONE_CONNECTED;
  149.     phone->callee = box;
  150.  
  151.     spinlock_lock(&box->lock);
  152.     list_append(&phone->link, &box->connected_phones);
  153.     spinlock_unlock(&box->lock);
  154.  
  155.     mutex_unlock(&phone->lock);
  156. }
  157.  
  158. /** Initialize a phone structure.
  159.  *
  160.  * @param phone     Phone structure to be initialized.
  161.  */
  162. void ipc_phone_init(phone_t *phone)
  163. {
  164.     mutex_initialize(&phone->lock, MUTEX_PASSIVE);
  165.     phone->callee = NULL;
  166.     phone->state = IPC_PHONE_FREE;
  167.     atomic_set(&phone->active_calls, 0);
  168. }
  169.  
  170. /** Helper function to facilitate synchronous calls.
  171.  *
  172.  * @param phone     Destination kernel phone structure.
  173.  * @param request   Call structure with request.
  174.  *
  175.  * @return      EOK on success or EINTR if the sleep was interrupted.
  176.  */
  177. int ipc_call_sync(phone_t *phone, call_t *request)
  178. {
  179.     answerbox_t sync_box;
  180.  
  181.     ipc_answerbox_init(&sync_box, TASK);
  182.  
  183.     /* We will receive data in a special box. */
  184.     request->callerbox = &sync_box;
  185.  
  186.     ipc_call(phone, request);
  187.     if (!ipc_wait_for_call(&sync_box, SYNCH_NO_TIMEOUT,
  188.         SYNCH_FLAGS_INTERRUPTIBLE))
  189.         return EINTR;
  190.     return EOK;
  191. }
  192.  
  193. /** Answer a message which was not dispatched and is not listed in any queue.
  194.  *
  195.  * @param call      Call structure to be answered.
  196.  */
  197. static void _ipc_answer_free_call(call_t *call)
  198. {
  199.     answerbox_t *callerbox = call->callerbox;
  200.  
  201.     call->flags |= IPC_CALL_ANSWERED;
  202.  
  203.     if (call->flags & IPC_CALL_FORWARDED) {
  204.         if (call->caller_phone) {
  205.             /* Demasquerade the caller phone. */
  206.             call->data.phone = call->caller_phone;
  207.         }
  208.     }
  209.  
  210.     spinlock_lock(&callerbox->lock);
  211.     list_append(&call->link, &callerbox->answers);
  212.     spinlock_unlock(&callerbox->lock);
  213.     waitq_wakeup(&callerbox->wq, WAKEUP_FIRST);
  214. }
  215.  
  216. /** Answer a message which is in a callee queue.
  217.  *
  218.  * @param box       Answerbox that is answering the message.
  219.  * @param call      Modified request that is being sent back.
  220.  */
  221. void ipc_answer(answerbox_t *box, call_t *call)
  222. {
  223.     /* Remove from active box */
  224.     spinlock_lock(&box->lock);
  225.     list_remove(&call->link);
  226.     spinlock_unlock(&box->lock);
  227.     /* Send back answer */
  228.     _ipc_answer_free_call(call);
  229. }
  230.  
  231. /** Simulate sending back a message.
  232.  *
  233.  * Most errors are better handled by forming a normal backward
  234.  * message and sending it as a normal answer.
  235.  *
  236.  * @param phone     Phone structure the call should appear to come from.
  237.  * @param call      Call structure to be answered.
  238.  * @param err       Return value to be used for the answer.
  239.  */
  240. void ipc_backsend_err(phone_t *phone, call_t *call, unative_t err)
  241. {
  242.     call->data.phone = phone;
  243.     atomic_inc(&phone->active_calls);
  244.     IPC_SET_RETVAL(call->data, err);
  245.     _ipc_answer_free_call(call);
  246. }
  247.  
  248. /** Unsafe unchecking version of ipc_call.
  249.  *
  250.  * @param phone     Phone structure the call comes from.
  251.  * @param box       Destination answerbox structure.
  252.  * @param call      Call structure with request.
  253.  */
  254. static void _ipc_call(phone_t *phone, answerbox_t *box, call_t *call)
  255. {
  256.     if (!(call->flags & IPC_CALL_FORWARDED)) {
  257.         atomic_inc(&phone->active_calls);
  258.         call->data.phone = phone;
  259.     }
  260.  
  261.     spinlock_lock(&box->lock);
  262.     list_append(&call->link, &box->calls);
  263.     spinlock_unlock(&box->lock);
  264.     waitq_wakeup(&box->wq, WAKEUP_FIRST);
  265. }
  266.  
  267. /** Send an asynchronous request using a phone to an answerbox.
  268.  *
  269.  * @param phone     Phone structure the call comes from and which is
  270.  *          connected to the destination answerbox.
  271.  * @param call      Call structure with request.
  272.  *
  273.  * @return      Return 0 on success, ENOENT on error.
  274.  */
  275. int ipc_call(phone_t *phone, call_t *call)
  276. {
  277.     answerbox_t *box;
  278.  
  279.     mutex_lock(&phone->lock);
  280.     if (phone->state != IPC_PHONE_CONNECTED) {
  281.         mutex_unlock(&phone->lock);
  282.         if (call->flags & IPC_CALL_FORWARDED) {
  283.             IPC_SET_RETVAL(call->data, EFORWARD);
  284.             _ipc_answer_free_call(call);
  285.         } else {
  286.             if (phone->state == IPC_PHONE_HUNGUP)
  287.                 ipc_backsend_err(phone, call, EHANGUP);
  288.             else
  289.                 ipc_backsend_err(phone, call, ENOENT);
  290.         }
  291.         return ENOENT;
  292.     }
  293.     box = phone->callee;
  294.     _ipc_call(phone, box, call);
  295.    
  296.     mutex_unlock(&phone->lock);
  297.     return 0;
  298. }
  299.  
  300. /** Disconnect phone from answerbox.
  301.  *
  302.  * This call leaves the phone in the HUNGUP state. The change to 'free' is done
  303.  * lazily later.
  304.  *
  305.  * @param phone     Phone structure to be hung up.
  306.  *              
  307.  * @return      Return 0 if the phone is disconnected.
  308.  *          Return -1 if the phone was already disconnected.
  309.  */
  310. int ipc_phone_hangup(phone_t *phone)
  311. {
  312.     answerbox_t *box;
  313.     call_t *call;
  314.    
  315.     mutex_lock(&phone->lock);
  316.     if (phone->state == IPC_PHONE_FREE ||
  317.         phone->state == IPC_PHONE_HUNGUP ||
  318.         phone->state == IPC_PHONE_CONNECTING) {
  319.         mutex_unlock(&phone->lock);
  320.         return -1;
  321.     }
  322.     box = phone->callee;
  323.     if (phone->state != IPC_PHONE_SLAMMED) {
  324.         /* Remove myself from answerbox */
  325.         spinlock_lock(&box->lock);
  326.         list_remove(&phone->link);
  327.         spinlock_unlock(&box->lock);
  328.  
  329.         if (phone->state != IPC_PHONE_SLAMMED) {
  330.             call = ipc_call_alloc(0);
  331.             IPC_SET_METHOD(call->data, IPC_M_PHONE_HUNGUP);
  332.             call->flags |= IPC_CALL_DISCARD_ANSWER;
  333.             _ipc_call(phone, box, call);
  334.         }
  335.     }
  336.  
  337.     phone->state = IPC_PHONE_HUNGUP;
  338.     mutex_unlock(&phone->lock);
  339.  
  340.     return 0;
  341. }
  342.  
  343. /** Forwards call from one answerbox to another one.
  344.  *
  345.  * @param call      Call structure to be redirected.
  346.  * @param newphone  Phone structure to target answerbox.
  347.  * @param oldbox    Old answerbox structure.
  348.  * @param mode      Flags that specify mode of the forward operation.
  349.  *
  350.  * @return      Return 0 if forwarding succeeded or an error code if
  351.  *          there was error.
  352.  *
  353.  * The return value serves only as an information for the forwarder,
  354.  * the original caller is notified automatically with EFORWARD.
  355.  */
  356. int ipc_forward(call_t *call, phone_t *newphone, answerbox_t *oldbox, int mode)
  357. {
  358.     spinlock_lock(&oldbox->lock);
  359.     list_remove(&call->link);
  360.     spinlock_unlock(&oldbox->lock);
  361.  
  362.     if (mode & IPC_FF_ROUTE_FROM_ME) {
  363.         if (!call->caller_phone)
  364.             call->caller_phone = call->data.phone;
  365.         call->data.phone = newphone;
  366.     }
  367.  
  368.     return ipc_call(newphone, call);
  369. }
  370.  
  371.  
  372. /** Wait for a phone call.
  373.  *
  374.  * @param box       Answerbox expecting the call.
  375.  * @param usec      Timeout in microseconds. See documentation for
  376.  *          waitq_sleep_timeout() for decription of its special
  377.  *          meaning.
  378.  * @param flags     Select mode of sleep operation. See documentation for
  379.  *          waitq_sleep_timeout() for description of its special
  380.  *          meaning.
  381.  * @return      Recived call structure or NULL.
  382.  *
  383.  * To distinguish between a call and an answer, have a look at call->flags.
  384.  */
  385. call_t *ipc_wait_for_call(answerbox_t *box, uint32_t usec, int flags)
  386. {
  387.     call_t *request;
  388.     ipl_t ipl;
  389.     int rc;
  390.  
  391. restart:
  392.     rc = waitq_sleep_timeout(&box->wq, usec, flags);
  393.     if (SYNCH_FAILED(rc))
  394.         return NULL;
  395.    
  396.     spinlock_lock(&box->lock);
  397.     if (!list_empty(&box->irq_notifs)) {
  398.         ipl = interrupts_disable();
  399.         spinlock_lock(&box->irq_lock);
  400.  
  401.         request = list_get_instance(box->irq_notifs.next, call_t, link);
  402.         list_remove(&request->link);
  403.  
  404.         spinlock_unlock(&box->irq_lock);
  405.         interrupts_restore(ipl);
  406.     } else if (!list_empty(&box->answers)) {
  407.         /* Handle asynchronous answers */
  408.         request = list_get_instance(box->answers.next, call_t, link);
  409.         list_remove(&request->link);
  410.         atomic_dec(&request->data.phone->active_calls);
  411.     } else if (!list_empty(&box->calls)) {
  412.         /* Handle requests */
  413.         request = list_get_instance(box->calls.next, call_t, link);
  414.         list_remove(&request->link);
  415.         /* Append request to dispatch queue */
  416.         list_append(&request->link, &box->dispatched_calls);
  417.     } else {
  418.         /* This can happen regularly after ipc_cleanup */
  419.         spinlock_unlock(&box->lock);
  420.         goto restart;
  421.     }
  422.     spinlock_unlock(&box->lock);
  423.     return request;
  424. }
  425.  
  426. /** Answer all calls from list with EHANGUP answer.
  427.  *
  428.  * @param lst       Head of the list to be cleaned up.
  429.  */
  430. static void ipc_cleanup_call_list(link_t *lst)
  431. {
  432.     call_t *call;
  433.  
  434.     while (!list_empty(lst)) {
  435.         call = list_get_instance(lst->next, call_t, link);
  436.         if (call->buffer)
  437.             free(call->buffer);
  438.         list_remove(&call->link);
  439.  
  440.         IPC_SET_RETVAL(call->data, EHANGUP);
  441.         _ipc_answer_free_call(call);
  442.     }
  443. }
  444.  
  445. /** Cleans up all IPC communication of the current task.
  446.  *
  447.  * Note: ipc_hangup sets returning answerbox to TASK->answerbox, you
  448.  * have to change it as well if you want to cleanup other tasks than TASK.
  449.  */
  450. void ipc_cleanup(void)
  451. {
  452.     int i;
  453.     call_t *call;
  454.     phone_t *phone;
  455.     DEADLOCK_PROBE_INIT(p_phonelck);
  456.  
  457.     /* Disconnect all our phones ('ipc_phone_hangup') */
  458.     for (i = 0; i < IPC_MAX_PHONES; i++)
  459.         ipc_phone_hangup(&TASK->phones[i]);
  460.  
  461.     /* Disconnect all connected irqs */
  462.     ipc_irq_cleanup(&TASK->answerbox);
  463.  
  464.     /* Disconnect all phones connected to our answerbox */
  465. restart_phones:
  466.     spinlock_lock(&TASK->answerbox.lock);
  467.     while (!list_empty(&TASK->answerbox.connected_phones)) {
  468.         phone = list_get_instance(TASK->answerbox.connected_phones.next,
  469.             phone_t, link);
  470.         if (SYNCH_FAILED(mutex_trylock(&phone->lock))) {
  471.             spinlock_unlock(&TASK->answerbox.lock);
  472.             DEADLOCK_PROBE(p_phonelck, DEADLOCK_THRESHOLD);
  473.             goto restart_phones;
  474.         }
  475.        
  476.         /* Disconnect phone */
  477.         ASSERT(phone->state == IPC_PHONE_CONNECTED);
  478.         phone->state = IPC_PHONE_SLAMMED;
  479.         list_remove(&phone->link);
  480.  
  481.         mutex_unlock(&phone->lock);
  482.     }
  483.  
  484.     /* Answer all messages in 'calls' and 'dispatched_calls' queues */
  485.     ipc_cleanup_call_list(&TASK->answerbox.dispatched_calls);
  486.     ipc_cleanup_call_list(&TASK->answerbox.calls);
  487.     spinlock_unlock(&TASK->answerbox.lock);
  488.    
  489.     /* Wait for all async answers to arrive */
  490.     while (1) {
  491.         /* Go through all phones, until all are FREE... */
  492.         /* Locking not needed, no one else should modify
  493.          * it, when we are in cleanup */
  494.         for (i = 0; i < IPC_MAX_PHONES; i++) {
  495.             if (TASK->phones[i].state == IPC_PHONE_HUNGUP &&
  496.                 atomic_get(&TASK->phones[i].active_calls) == 0)
  497.                 TASK->phones[i].state = IPC_PHONE_FREE;
  498.            
  499.             /* Just for sure, we might have had some
  500.              * IPC_PHONE_CONNECTING phones */
  501.             if (TASK->phones[i].state == IPC_PHONE_CONNECTED)
  502.                 ipc_phone_hangup(&TASK->phones[i]);
  503.             /* If the hangup succeeded, it has sent a HANGUP
  504.              * message, the IPC is now in HUNGUP state, we
  505.              * wait for the reply to come */
  506.            
  507.             if (TASK->phones[i].state != IPC_PHONE_FREE)
  508.                 break;
  509.         }
  510.         /* Voila, got into cleanup */
  511.         if (i == IPC_MAX_PHONES)
  512.             break;
  513.        
  514.         call = ipc_wait_for_call(&TASK->answerbox, SYNCH_NO_TIMEOUT,
  515.             SYNCH_FLAGS_NONE);
  516.         ASSERT((call->flags & IPC_CALL_ANSWERED) ||
  517.             (call->flags & IPC_CALL_NOTIF));
  518.         ASSERT(!(call->flags & IPC_CALL_STATIC_ALLOC));
  519.        
  520.         atomic_dec(&TASK->active_calls);
  521.         ipc_call_free(call);
  522.     }
  523. }
  524.  
  525.  
  526. /** Initilize IPC subsystem */
  527. void ipc_init(void)
  528. {
  529.     ipc_call_slab = slab_cache_create("ipc_call", sizeof(call_t), 0, NULL,
  530.         NULL, 0);
  531. }
  532.  
  533.  
  534. /** List answerbox contents.
  535.  *
  536.  * @param taskid    Task ID.
  537.  */
  538. void ipc_print_task(task_id_t taskid)
  539. {
  540.     task_t *task;
  541.     int i;
  542.     call_t *call;
  543.     link_t *tmp;
  544.    
  545.     spinlock_lock(&tasks_lock);
  546.     task = task_find_by_id(taskid);
  547.     if (task)
  548.         spinlock_lock(&task->lock);
  549.     spinlock_unlock(&tasks_lock);
  550.     if (!task)
  551.         return;
  552.  
  553.     /* Print opened phones & details */
  554.     printf("PHONE:\n");
  555.     for (i = 0; i < IPC_MAX_PHONES; i++) {
  556.         if (SYNCH_FAILED(mutex_trylock(&task->phones[i].lock))) {
  557.             printf("%d: mutex busy\n", i);
  558.             continue;
  559.         }
  560.         if (task->phones[i].state != IPC_PHONE_FREE) {
  561.             printf("%d: ", i);
  562.             switch (task->phones[i].state) {
  563.             case IPC_PHONE_CONNECTING:
  564.                 printf("connecting ");
  565.                 break;
  566.             case IPC_PHONE_CONNECTED:
  567.                 printf("connected to: %p ",
  568.                        task->phones[i].callee);
  569.                 break;
  570.             case IPC_PHONE_SLAMMED:
  571.                 printf("slammed by: %p ",
  572.                        task->phones[i].callee);
  573.                 break;
  574.             case IPC_PHONE_HUNGUP:
  575.                 printf("hung up - was: %p ",
  576.                        task->phones[i].callee);
  577.                 break;
  578.             default:
  579.                 break;
  580.             }
  581.             printf("active: %ld\n",
  582.                 atomic_get(&task->phones[i].active_calls));
  583.         }
  584.         mutex_unlock(&task->phones[i].lock);
  585.     }
  586.  
  587.  
  588.     /* Print answerbox - calls */
  589.     spinlock_lock(&task->answerbox.lock);
  590.     printf("ABOX - CALLS:\n");
  591.     for (tmp = task->answerbox.calls.next; tmp != &task->answerbox.calls;
  592.         tmp = tmp->next) {
  593.         call = list_get_instance(tmp, call_t, link);
  594.         printf("Callid: %p Srctask:%" PRIu64 " M:%" PRIun
  595.             " A1:%" PRIun " A2:%" PRIun " A3:%" PRIun
  596.             " A4:%" PRIun " A5:%" PRIun " Flags:%x\n", call,
  597.             call->sender->taskid,
  598.             IPC_GET_METHOD(call->data), IPC_GET_ARG1(call->data),
  599.             IPC_GET_ARG2(call->data), IPC_GET_ARG3(call->data),
  600.             IPC_GET_ARG4(call->data), IPC_GET_ARG5(call->data),
  601.             call->flags);
  602.     }
  603.     /* Print answerbox - calls */
  604.     printf("ABOX - DISPATCHED CALLS:\n");
  605.     for (tmp = task->answerbox.dispatched_calls.next;
  606.         tmp != &task->answerbox.dispatched_calls;
  607.         tmp = tmp->next) {
  608.         call = list_get_instance(tmp, call_t, link);
  609.         printf("Callid: %p Srctask:%" PRIu64 " M:%" PRIun
  610.             " A1:%" PRIun " A2:%" PRIun " A3:%" PRIun
  611.             " A4:%" PRIun " A5:%" PRIun " Flags:%x\n", call,
  612.             call->sender->taskid,
  613.             IPC_GET_METHOD(call->data), IPC_GET_ARG1(call->data),
  614.             IPC_GET_ARG2(call->data), IPC_GET_ARG3(call->data),
  615.             IPC_GET_ARG4(call->data), IPC_GET_ARG5(call->data),
  616.             call->flags);
  617.     }
  618.     /* Print answerbox - calls */
  619.     printf("ABOX - ANSWERS:\n");
  620.     for (tmp = task->answerbox.answers.next;
  621.         tmp != &task->answerbox.answers;
  622.         tmp = tmp->next) {
  623.         call = list_get_instance(tmp, call_t, link);
  624.         printf("Callid:%p M:%" PRIun " A1:%" PRIun " A2:%" PRIun
  625.             " A3:%" PRIun " A4:%" PRIun " A5:%" PRIun " Flags:%x\n",
  626.             call, IPC_GET_METHOD(call->data), IPC_GET_ARG1(call->data),
  627.             IPC_GET_ARG2(call->data), IPC_GET_ARG3(call->data),
  628.             IPC_GET_ARG4(call->data), IPC_GET_ARG5(call->data),
  629.             call->flags);
  630.     }
  631.  
  632.     spinlock_unlock(&task->answerbox.lock);
  633.     spinlock_unlock(&task->lock);
  634. }
  635.  
  636. /** @}
  637.  */
  638.