WebSVN – HelenOS-historic – Diff – /kernel/trunk/generic/src/ipc/sysipc.c


/*
 * Copyright (C) 2006 Ondrej Palkovsky
 * 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.
 */
 
#include <arch.h>
#include <proc/task.h>
#include <proc/thread.h>
#include <errno.h>
#include <memstr.h>
#include <debug.h>
#include <ipc/ipc.h>
#include <ipc/sysipc.h>
#include <ipc/irq.h>
#include <ipc/ipcrsc.h>
#include <arch/interrupt.h>
#include <print.h>
#include <syscall/copy.h>
#include <security/cap.h>
 
#define GET_CHECK_PHONE(phone,phoneid,err) { \
      if (phoneid > IPC_MAX_PHONES) { err; } \
      phone = &TASK->phones[phoneid]; \
}
 
#define STRUCT_TO_USPACE(dst,src) copy_to_uspace(dst,src,sizeof(*(src)))
 
/** Return true if the method is a system method */
static inline int is_system_method(__native method)
{
    if (method <= IPC_M_LAST_SYSTEM)
        return 1;
    return 0;
}
 
/** Return true if the message with this method is forwardable
 *
 * - some system messages may be forwarded, for some of them
 *   it is useless
 */
static inline int is_forwardable(__native method)
{
    if (method == IPC_M_PHONE_HUNGUP)
        return 0; /* This message is meant only for the receiver */
    return 1;
}
 
/****************************************************/
/* Functions that preprocess answer before sending
 * it to the recepient
 */
 
/** Return true if the caller (ipc_answer) should save
 * the old call contents for answer_preprocess
 */
static inline int answer_need_old(call_t *call)
{
    if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)
        return 1;
    if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_ME_TO)
        return 1;
    return 0;
}
 
/** Interpret process answer as control information */
static inline void answer_preprocess(call_t *answer, ipc_data_t *olddata)
{
    int phoneid;
 
    if (IPC_GET_RETVAL(answer->data) == EHANGUP) {
        /* In case of forward, hangup the forwared phone,
         * not the originator
         */
        spinlock_lock(&answer->data.phone->lock);
        spinlock_lock(&TASK->answerbox.lock);
        if (answer->data.phone->callee) {
            list_remove(&answer->data.phone->list);
            answer->data.phone->callee = 0;
        }
        spinlock_unlock(&TASK->answerbox.lock);
        spinlock_unlock(&answer->data.phone->lock);
    }
 
    if (!olddata)
        return;
 
    if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) {
        phoneid = IPC_GET_ARG3(*olddata);
        if (IPC_GET_RETVAL(answer->data)) {
            /* The connection was not accepted */
            phone_dealloc(phoneid);
        } else {
            /* The connection was accepted */
            phone_connect(phoneid,&answer->sender->answerbox);
            /* Set 'phone identification' as arg3 of response */
            IPC_SET_ARG3(answer->data, (__native)&TASK->phones[phoneid]);
        }
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) {
        /* If the users accepted call, connect */
        if (!IPC_GET_RETVAL(answer->data)) {
            ipc_phone_connect((phone_t *)IPC_GET_ARG3(*olddata),
                      &TASK->answerbox);
        }
    }
}
 
/** Called before the request is sent
 *
 * @return 0 - no error, -1 - report error to user
 */
static int request_preprocess(call_t *call)
{
    int newphid;
 
    switch (IPC_GET_METHOD(call->data)) {
    case IPC_M_CONNECT_ME_TO:
        newphid = phone_alloc();
        if (newphid < 0)
            return ELIMIT;
        /* Set arg3 for server */
        IPC_SET_ARG3(call->data, (__native)&TASK->phones[newphid]);
        call->flags |= IPC_CALL_CONN_ME_TO;
        call->private = newphid;
        break;
    default:
        break;
    }
    return 0;
}
 
/****************************************************/
/* Functions called to process received call/answer
 * before passing to uspace
 */
 
/** Do basic kernel processing of received call answer */
static void process_answer(call_t *call)
{
    if (IPC_GET_RETVAL(call->data) == EHANGUP && \
        call->flags & IPC_CALL_FORWARDED)
        IPC_SET_RETVAL(call->data, EFORWARD);
 
    if (call->flags & IPC_CALL_CONN_ME_TO) {
        if (IPC_GET_RETVAL(call->data))
            phone_dealloc(call->private);
        else
            IPC_SET_ARG3(call->data, call->private);
    }
}
 
/** Do basic kernel processing of received call request
 *
 * @return 0 - the call should be passed to userspace, 1 - ignore call
 */
static int process_request(answerbox_t *box,call_t *call)
{
    int phoneid;
 
    if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) {
        phoneid = phone_alloc();
        if (phoneid < 0) { /* Failed to allocate phone */
            IPC_SET_RETVAL(call->data, ELIMIT);
            ipc_answer(box,call);
            return -1;
        }
        IPC_SET_ARG3(call->data, phoneid);
    }
    return 0;
}
 
/** Send a call over IPC, wait for reply, return to user
 *
 * @return Call identification, returns -1 on fatal error,
           -2 on 'Too many async request, handle answers first
 */
__native sys_ipc_call_sync_fast(__native phoneid, __native method,
                __native arg1, ipc_data_t *data)
{
    call_t call;
    phone_t *phone;
    int res;
 
    GET_CHECK_PHONE(phone, phoneid, return ENOENT);
 
    ipc_call_static_init(&call);
    IPC_SET_METHOD(call.data, method);
    IPC_SET_ARG1(call.data, arg1);
 
    if (!(res=request_preprocess(&call))) {
        ipc_call_sync(phone, &call);
        process_answer(&call);
    } else
        IPC_SET_RETVAL(call.data, res);
    STRUCT_TO_USPACE(&data->args, &call.data.args);
 
    return 0;
}
 
/** Synchronous IPC call allowing to send whole message */
__native sys_ipc_call_sync(__native phoneid, ipc_data_t *question,
               ipc_data_t *reply)
{
    call_t call;
    phone_t *phone;
    int res;
    int rc;
 
    ipc_call_static_init(&call);
    rc = copy_from_uspace(&call.data.args, &question->args, sizeof(call.data.args));
    if (rc != 0)
        return (__native) rc;
 
    GET_CHECK_PHONE(phone, phoneid, return ENOENT);
 
    if (!(res=request_preprocess(&call))) {
        ipc_call_sync(phone, &call);
        process_answer(&call);
    } else
        IPC_SET_RETVAL(call.data, res);
 
    rc = STRUCT_TO_USPACE(&reply->args, &call.data.args);
    if (rc != 0)
        return rc;
 
    return 0;
}
 
/** Check that the task did not exceed allowed limit
 *
 * @return 0 - Limit OK,   -1 - limit exceeded
 */
static int check_call_limit(void)
{
    if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) {
        atomic_dec(&TASK->active_calls);
        return -1;
    }
    return 0;
}
 
/** Send an asynchronous call over ipc
 *
 * @return Call identification, returns -1 on fatal error,
           -2 on 'Too many async request, handle answers first
 */
__native sys_ipc_call_async_fast(__native phoneid, __native method,
                 __native arg1, __native arg2)
{
    call_t *call;
    phone_t *phone;
    int res;
 
    if (check_call_limit())
        return IPC_CALLRET_TEMPORARY;
 
    GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
 
    call = ipc_call_alloc(0);
    IPC_SET_METHOD(call->data, method);
    IPC_SET_ARG1(call->data, arg1);
    IPC_SET_ARG2(call->data, arg2);
 
    if (!(res=request_preprocess(call)))
        ipc_call(phone, call);
    else
        ipc_backsend_err(phone, call, res);
 
    return (__native) call;
}
 
/** Synchronous IPC call allowing to send whole message
 *
 * @return The same as sys_ipc_call_async
 */
__native sys_ipc_call_async(__native phoneid, ipc_data_t *data)
{
    call_t *call;
    phone_t *phone;
    int res;
    int rc;
 
    if (check_call_limit())
        return IPC_CALLRET_TEMPORARY;
 
    GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
 
    call = ipc_call_alloc(0);
    rc = copy_from_uspace(&call->data.args, &data->args, sizeof(call->data.args));
    if (rc != 0) {
        ipc_call_free(call);
        return (__native) rc;
    }
    if (!(res=request_preprocess(call)))
        ipc_call(phone, call);
    else
        ipc_backsend_err(phone, call, res);
 
    return (__native) call;
}
 
/** Forward received call to another destination
 *
 * The arg1 and arg2 are changed in the forwarded message
 *
 * Warning: If implementing non-fast version, make sure that
 *          arg3 is not rewritten for certain system IPC
 */
__native sys_ipc_forward_fast(__native callid, __native phoneid,
                  __native method, __native arg1)
{
    call_t *call;
    phone_t *phone;
 
    call = get_call(callid);
    if (!call)
        return ENOENT;
 
    call->flags |= IPC_CALL_FORWARDED;
 
    GET_CHECK_PHONE(phone, phoneid, {
        IPC_SET_RETVAL(call->data, EFORWARD);
        ipc_answer(&TASK->answerbox, call);
        return ENOENT;
    });    
 
    if (!is_forwardable(IPC_GET_METHOD(call->data))) {
        IPC_SET_RETVAL(call->data, EFORWARD);
        ipc_answer(&TASK->answerbox, call);
        return EPERM;
    }
 
    /* Userspace is not allowed to change method of system methods
     * on forward, allow changing ARG1 and ARG2 by means of method and arg1
     */
    if (is_system_method(IPC_GET_METHOD(call->data))) {
        if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)
            phone_dealloc(IPC_GET_ARG3(call->data));
 
        IPC_SET_ARG1(call->data, method);
        IPC_SET_ARG2(call->data, arg1);
    } else {
        IPC_SET_METHOD(call->data, method);
        IPC_SET_ARG1(call->data, arg1);
    }
 
    return ipc_forward(call, phone, &TASK->answerbox);
}
 
/** Send IPC answer */
__native sys_ipc_answer_fast(__native callid, __native retval,
                 __native arg1, __native arg2)
{
    call_t *call;
    ipc_data_t saved_data;
    int saveddata = 0;
 
    call = get_call(callid);
    if (!call)
        return ENOENT;
 
    if (answer_need_old(call)) {
        memcpy(&saved_data, &call->data, sizeof(call->data));
        saveddata = 1;
    }
 
    IPC_SET_RETVAL(call->data, retval);
    IPC_SET_ARG1(call->data, arg1);
    IPC_SET_ARG2(call->data, arg2);
    answer_preprocess(call, saveddata ? &saved_data : NULL);
 
    ipc_answer(&TASK->answerbox, call);
    return 0;
}
 
/** Send IPC answer */
__native sys_ipc_answer(__native callid, ipc_data_t *data)
{
    call_t *call;
    ipc_data_t saved_data;
    int saveddata = 0;
    int rc;
 
    call = get_call(callid);
    if (!call)
        return ENOENT;
 
    if (answer_need_old(call)) {
        memcpy(&saved_data, &call->data, sizeof(call->data));
        saveddata = 1;
    }
    rc = copy_from_uspace(&call->data.args, &data->args,
             sizeof(call->data.args));
    if (rc != 0)
        return rc;
 
    answer_preprocess(call, saveddata ? &saved_data : NULL);
   
    ipc_answer(&TASK->answerbox, call);
 
    return 0;
}
 
/** Hang up the phone
 *
 */
__native sys_ipc_hangup(int phoneid)
{
    phone_t *phone;
 
    GET_CHECK_PHONE(phone, phoneid, return ENOENT);
 
    if (ipc_phone_hangup(phone))
        return -1;
 
    return 0;
}
 
/** Wait for incoming ipc call or answer
 *
 * @param calldata Pointer to buffer where the call/answer data is stored
 * @param flags
 * @return Callid, if callid & 1, then the call is answer
 */
__native sys_ipc_wait_for_call(ipc_data_t *calldata, __native flags)
{
    call_t *call;
 
restart:   
    call = ipc_wait_for_call(&TASK->answerbox, flags);
    if (!call)
        return 0;
 
    if (call->flags & IPC_CALL_NOTIF) {
        ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC));
        STRUCT_TO_USPACE(&calldata->args, &call->data.args);
        ipc_call_free(call);
       
        return ((__native)call) | IPC_CALLID_NOTIFICATION;
    }
 
    if (call->flags & IPC_CALL_ANSWERED) {
        process_answer(call);
 
        ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC));
 
        atomic_dec(&TASK->active_calls);
 
        if (call->flags & IPC_CALL_DISCARD_ANSWER) {
            ipc_call_free(call);
            goto restart;
        }
 
        STRUCT_TO_USPACE(&calldata->args, &call->data.args);
        ipc_call_free(call);
 
        return ((__native)call) | IPC_CALLID_ANSWERED;
    }
 
    if (process_request(&TASK->answerbox, call))
        goto restart;
 
    /* Include phone address('id') of the caller in the request,
     * copy whole call->data, not only call->data.args */
    STRUCT_TO_USPACE(calldata, &call->data);
    return (__native)call;
}
 
/** Connect irq handler to task */
__native sys_ipc_register_irq(__native irq, irq_code_t *ucode)
{
    if (!(cap_get(TASK) & CAP_IRQ_REG))
        return EPERM;
 
    if (irq >= IRQ_COUNT)
        return (__native) ELIMIT;
 
    irq_ipc_bind_arch(irq);
 
    return ipc_irq_register(&TASK->answerbox, irq, ucode);
}
 
/* Disconnect irq handler from task */
__native sys_ipc_unregister_irq(__native irq)
{
    if (!(cap_get(TASK) & CAP_IRQ_REG))
        return EPERM;
 
    if (irq >= IRQ_COUNT)
        return (__native) ELIMIT;
 
    ipc_irq_unregister(&TASK->answerbox, irq);
 
    return 0;
}
 

Rev 1293	Rev 1297
1	/*	1	/*
2	* Copyright (C) 2006 Ondrej Palkovsky	2	* Copyright (C) 2006 Ondrej Palkovsky
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	#include <arch.h>	29	#include <arch.h>
30	#include <proc/task.h>	30	#include <proc/task.h>
31	#include <proc/thread.h>	31	#include <proc/thread.h>
32	#include <errno.h>	32	#include <errno.h>
33	#include <memstr.h>	33	#include <memstr.h>
34	#include <debug.h>	34	#include <debug.h>
35	#include <ipc/ipc.h>	35	#include <ipc/ipc.h>
36	#include <ipc/sysipc.h>	36	#include <ipc/sysipc.h>
37	#include <ipc/irq.h>	37	#include <ipc/irq.h>
38	#include <ipc/ipcrsc.h>	38	#include <ipc/ipcrsc.h>
39	#include <arch/interrupt.h>	39	#include <arch/interrupt.h>
40	#include <print.h>	40	#include <print.h>
41	#include <syscall/copy.h>	41	#include <syscall/copy.h>
-		42	#include <security/cap.h>
42		43
43	#define GET_CHECK_PHONE(phone,phoneid,err) { \	44	#define GET_CHECK_PHONE(phone,phoneid,err) { \
44	if (phoneid > IPC_MAX_PHONES) { err; } \	45	if (phoneid > IPC_MAX_PHONES) { err; } \
45	phone = &TASK->phones[phoneid]; \	46	phone = &TASK->phones[phoneid]; \
46	}	47	}
47		48
48	#define STRUCT_TO_USPACE(dst,src) copy_to_uspace(dst,src,sizeof(*(src)))	49	#define STRUCT_TO_USPACE(dst,src) copy_to_uspace(dst,src,sizeof(*(src)))
49		50
50	/** Return true if the method is a system method */	51	/** Return true if the method is a system method */
51	static inline int is_system_method(__native method)	52	static inline int is_system_method(__native method)
52	{	53	{
53	if (method <= IPC_M_LAST_SYSTEM)	54	if (method <= IPC_M_LAST_SYSTEM)
54	return 1;	55	return 1;
55	return 0;	56	return 0;
56	}	57	}
57		58
58	/** Return true if the message with this method is forwardable	59	/** Return true if the message with this method is forwardable
59	*	60	*
60	* - some system messages may be forwarded, for some of them	61	* - some system messages may be forwarded, for some of them
61	* it is useless	62	* it is useless
62	*/	63	*/
63	static inline int is_forwardable(__native method)	64	static inline int is_forwardable(__native method)
64	{	65	{
65	if (method == IPC_M_PHONE_HUNGUP)	66	if (method == IPC_M_PHONE_HUNGUP)
66	return 0; /* This message is meant only for the receiver */	67	return 0; /* This message is meant only for the receiver */
67	return 1;	68	return 1;
68	}	69	}
69		70
70	/****************************************************/	71	/****************************************************/
71	/* Functions that preprocess answer before sending	72	/* Functions that preprocess answer before sending
72	* it to the recepient	73	* it to the recepient
73	*/	74	*/
74		75
75	/** Return true if the caller (ipc_answer) should save	76	/** Return true if the caller (ipc_answer) should save
76	* the old call contents for answer_preprocess	77	* the old call contents for answer_preprocess
77	*/	78	*/
78	static inline int answer_need_old(call_t *call)	79	static inline int answer_need_old(call_t *call)
79	{	80	{
80	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)	81	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)
81	return 1;	82	return 1;
82	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_ME_TO)	83	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_ME_TO)
83	return 1;	84	return 1;
84	return 0;	85	return 0;
85	}	86	}
86		87
87	/** Interpret process answer as control information */	88	/** Interpret process answer as control information */
88	static inline void answer_preprocess(call_t answer, ipc_data_t olddata)	89	static inline void answer_preprocess(call_t answer, ipc_data_t olddata)
89	{	90	{
90	int phoneid;	91	int phoneid;
91		92
92	if (IPC_GET_RETVAL(answer->data) == EHANGUP) {	93	if (IPC_GET_RETVAL(answer->data) == EHANGUP) {
93	/* In case of forward, hangup the forwared phone,	94	/* In case of forward, hangup the forwared phone,
94	* not the originator	95	* not the originator
95	*/	96	*/
96	spinlock_lock(&answer->data.phone->lock);	97	spinlock_lock(&answer->data.phone->lock);
97	spinlock_lock(&TASK->answerbox.lock);	98	spinlock_lock(&TASK->answerbox.lock);
98	if (answer->data.phone->callee) {	99	if (answer->data.phone->callee) {
99	list_remove(&answer->data.phone->list);	100	list_remove(&answer->data.phone->list);
100	answer->data.phone->callee = 0;	101	answer->data.phone->callee = 0;
101	}	102	}
102	spinlock_unlock(&TASK->answerbox.lock);	103	spinlock_unlock(&TASK->answerbox.lock);
103	spinlock_unlock(&answer->data.phone->lock);	104	spinlock_unlock(&answer->data.phone->lock);
104	}	105	}
105		106
106	if (!olddata)	107	if (!olddata)
107	return;	108	return;
108		109
109	if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) {	110	if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) {
110	phoneid = IPC_GET_ARG3(*olddata);	111	phoneid = IPC_GET_ARG3(*olddata);
111	if (IPC_GET_RETVAL(answer->data)) {	112	if (IPC_GET_RETVAL(answer->data)) {
112	/* The connection was not accepted */	113	/* The connection was not accepted */
113	phone_dealloc(phoneid);	114	phone_dealloc(phoneid);
114	} else {	115	} else {
115	/* The connection was accepted */	116	/* The connection was accepted */
116	phone_connect(phoneid,&answer->sender->answerbox);	117	phone_connect(phoneid,&answer->sender->answerbox);
117	/* Set 'phone identification' as arg3 of response */	118	/* Set 'phone identification' as arg3 of response */
118	IPC_SET_ARG3(answer->data, (__native)&TASK->phones[phoneid]);	119	IPC_SET_ARG3(answer->data, (__native)&TASK->phones[phoneid]);
119	}	120	}
120	} else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) {	121	} else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) {
121	/* If the users accepted call, connect */	122	/* If the users accepted call, connect */
122	if (!IPC_GET_RETVAL(answer->data)) {	123	if (!IPC_GET_RETVAL(answer->data)) {
123	ipc_phone_connect((phone_t )IPC_GET_ARG3(olddata),	124	ipc_phone_connect((phone_t )IPC_GET_ARG3(olddata),
124	&TASK->answerbox);	125	&TASK->answerbox);
125	}	126	}
126	}	127	}
127	}	128	}
128		129
129	/** Called before the request is sent	130	/** Called before the request is sent
130	*	131	*
131	* @return 0 - no error, -1 - report error to user	132	* @return 0 - no error, -1 - report error to user
132	*/	133	*/
133	static int request_preprocess(call_t *call)	134	static int request_preprocess(call_t *call)
134	{	135	{
135	int newphid;	136	int newphid;
136		137
137	switch (IPC_GET_METHOD(call->data)) {	138	switch (IPC_GET_METHOD(call->data)) {
138	case IPC_M_CONNECT_ME_TO:	139	case IPC_M_CONNECT_ME_TO:
139	newphid = phone_alloc();	140	newphid = phone_alloc();
140	if (newphid < 0)	141	if (newphid < 0)
141	return ELIMIT;	142	return ELIMIT;
142	/* Set arg3 for server */	143	/* Set arg3 for server */
143	IPC_SET_ARG3(call->data, (__native)&TASK->phones[newphid]);	144	IPC_SET_ARG3(call->data, (__native)&TASK->phones[newphid]);
144	call->flags \|= IPC_CALL_CONN_ME_TO;	145	call->flags \|= IPC_CALL_CONN_ME_TO;
145	call->private = newphid;	146	call->private = newphid;
146	break;	147	break;
147	default:	148	default:
148	break;	149	break;
149	}	150	}
150	return 0;	151	return 0;
151	}	152	}
152		153
153	/****************************************************/	154	/****************************************************/
154	/* Functions called to process received call/answer	155	/* Functions called to process received call/answer
155	* before passing to uspace	156	* before passing to uspace
156	*/	157	*/
157		158
158	/** Do basic kernel processing of received call answer */	159	/** Do basic kernel processing of received call answer */
159	static void process_answer(call_t *call)	160	static void process_answer(call_t *call)
160	{	161	{
161	if (IPC_GET_RETVAL(call->data) == EHANGUP && \	162	if (IPC_GET_RETVAL(call->data) == EHANGUP && \
162	call->flags & IPC_CALL_FORWARDED)	163	call->flags & IPC_CALL_FORWARDED)
163	IPC_SET_RETVAL(call->data, EFORWARD);	164	IPC_SET_RETVAL(call->data, EFORWARD);
164		165
165	if (call->flags & IPC_CALL_CONN_ME_TO) {	166	if (call->flags & IPC_CALL_CONN_ME_TO) {
166	if (IPC_GET_RETVAL(call->data))	167	if (IPC_GET_RETVAL(call->data))
167	phone_dealloc(call->private);	168	phone_dealloc(call->private);
168	else	169	else
169	IPC_SET_ARG3(call->data, call->private);	170	IPC_SET_ARG3(call->data, call->private);
170	}	171	}
171	}	172	}
172		173
173	/** Do basic kernel processing of received call request	174	/** Do basic kernel processing of received call request
174	*	175	*
175	* @return 0 - the call should be passed to userspace, 1 - ignore call	176	* @return 0 - the call should be passed to userspace, 1 - ignore call
176	*/	177	*/
177	static int process_request(answerbox_t box,call_t call)	178	static int process_request(answerbox_t box,call_t call)
178	{	179	{
179	int phoneid;	180	int phoneid;
180		181
181	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) {	182	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) {
182	phoneid = phone_alloc();	183	phoneid = phone_alloc();
183	if (phoneid < 0) { /* Failed to allocate phone */	184	if (phoneid < 0) { /* Failed to allocate phone */
184	IPC_SET_RETVAL(call->data, ELIMIT);	185	IPC_SET_RETVAL(call->data, ELIMIT);
185	ipc_answer(box,call);	186	ipc_answer(box,call);
186	return -1;	187	return -1;
187	}	188	}
188	IPC_SET_ARG3(call->data, phoneid);	189	IPC_SET_ARG3(call->data, phoneid);
189	}	190	}
190	return 0;	191	return 0;
191	}	192	}
192		193
193	/** Send a call over IPC, wait for reply, return to user	194	/** Send a call over IPC, wait for reply, return to user
194	*	195	*
195	* @return Call identification, returns -1 on fatal error,	196	* @return Call identification, returns -1 on fatal error,
196	-2 on 'Too many async request, handle answers first	197	-2 on 'Too many async request, handle answers first
197	*/	198	*/
198	__native sys_ipc_call_sync_fast(__native phoneid, __native method,	199	__native sys_ipc_call_sync_fast(__native phoneid, __native method,
199	__native arg1, ipc_data_t *data)	200	__native arg1, ipc_data_t *data)
200	{	201	{
201	call_t call;	202	call_t call;
202	phone_t *phone;	203	phone_t *phone;
203	int res;	204	int res;
204		205
205	GET_CHECK_PHONE(phone, phoneid, return ENOENT);	206	GET_CHECK_PHONE(phone, phoneid, return ENOENT);
206		207
207	ipc_call_static_init(&call);	208	ipc_call_static_init(&call);
208	IPC_SET_METHOD(call.data, method);	209	IPC_SET_METHOD(call.data, method);
209	IPC_SET_ARG1(call.data, arg1);	210	IPC_SET_ARG1(call.data, arg1);
210		211
211	if (!(res=request_preprocess(&call))) {	212	if (!(res=request_preprocess(&call))) {
212	ipc_call_sync(phone, &call);	213	ipc_call_sync(phone, &call);
213	process_answer(&call);	214	process_answer(&call);
214	} else	215	} else
215	IPC_SET_RETVAL(call.data, res);	216	IPC_SET_RETVAL(call.data, res);
216	STRUCT_TO_USPACE(&data->args, &call.data.args);	217	STRUCT_TO_USPACE(&data->args, &call.data.args);
217		218
218	return 0;	219	return 0;
219	}	220	}
220		221
221	/** Synchronous IPC call allowing to send whole message */	222	/** Synchronous IPC call allowing to send whole message */
222	__native sys_ipc_call_sync(__native phoneid, ipc_data_t *question,	223	__native sys_ipc_call_sync(__native phoneid, ipc_data_t *question,
223	ipc_data_t *reply)	224	ipc_data_t *reply)
224	{	225	{
225	call_t call;	226	call_t call;
226	phone_t *phone;	227	phone_t *phone;
227	int res;	228	int res;
228	int rc;	229	int rc;
229		230
230	ipc_call_static_init(&call);	231	ipc_call_static_init(&call);
231	rc = copy_from_uspace(&call.data.args, &question->args, sizeof(call.data.args));	232	rc = copy_from_uspace(&call.data.args, &question->args, sizeof(call.data.args));
232	if (rc != 0)	233	if (rc != 0)
233	return (__native) rc;	234	return (__native) rc;
234		235
235	GET_CHECK_PHONE(phone, phoneid, return ENOENT);	236	GET_CHECK_PHONE(phone, phoneid, return ENOENT);
236		237
237	if (!(res=request_preprocess(&call))) {	238	if (!(res=request_preprocess(&call))) {
238	ipc_call_sync(phone, &call);	239	ipc_call_sync(phone, &call);
239	process_answer(&call);	240	process_answer(&call);
240	} else	241	} else
241	IPC_SET_RETVAL(call.data, res);	242	IPC_SET_RETVAL(call.data, res);
242		243
243	rc = STRUCT_TO_USPACE(&reply->args, &call.data.args);	244	rc = STRUCT_TO_USPACE(&reply->args, &call.data.args);
244	if (rc != 0)	245	if (rc != 0)
245	return rc;	246	return rc;
246		247
247	return 0;	248	return 0;
248	}	249	}
249		250
250	/** Check that the task did not exceed allowed limit	251	/** Check that the task did not exceed allowed limit
251	*	252	*
252	* @return 0 - Limit OK, -1 - limit exceeded	253	* @return 0 - Limit OK, -1 - limit exceeded
253	*/	254	*/
254	static int check_call_limit(void)	255	static int check_call_limit(void)
255	{	256	{
256	if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) {	257	if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) {
257	atomic_dec(&TASK->active_calls);	258	atomic_dec(&TASK->active_calls);
258	return -1;	259	return -1;
259	}	260	}
260	return 0;	261	return 0;
261	}	262	}
262		263
263	/** Send an asynchronous call over ipc	264	/** Send an asynchronous call over ipc
264	*	265	*
265	* @return Call identification, returns -1 on fatal error,	266	* @return Call identification, returns -1 on fatal error,
266	-2 on 'Too many async request, handle answers first	267	-2 on 'Too many async request, handle answers first
267	*/	268	*/
268	__native sys_ipc_call_async_fast(__native phoneid, __native method,	269	__native sys_ipc_call_async_fast(__native phoneid, __native method,
269	__native arg1, __native arg2)	270	__native arg1, __native arg2)
270	{	271	{
271	call_t *call;	272	call_t *call;
272	phone_t *phone;	273	phone_t *phone;
273	int res;	274	int res;
274		275
275	if (check_call_limit())	276	if (check_call_limit())
276	return IPC_CALLRET_TEMPORARY;	277	return IPC_CALLRET_TEMPORARY;
277		278
278	GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);	279	GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
279		280
280	call = ipc_call_alloc(0);	281	call = ipc_call_alloc(0);
281	IPC_SET_METHOD(call->data, method);	282	IPC_SET_METHOD(call->data, method);
282	IPC_SET_ARG1(call->data, arg1);	283	IPC_SET_ARG1(call->data, arg1);
283	IPC_SET_ARG2(call->data, arg2);	284	IPC_SET_ARG2(call->data, arg2);
284		285
285	if (!(res=request_preprocess(call)))	286	if (!(res=request_preprocess(call)))
286	ipc_call(phone, call);	287	ipc_call(phone, call);
287	else	288	else
288	ipc_backsend_err(phone, call, res);	289	ipc_backsend_err(phone, call, res);
289		290
290	return (__native) call;	291	return (__native) call;
291	}	292	}
292		293
293	/** Synchronous IPC call allowing to send whole message	294	/** Synchronous IPC call allowing to send whole message
294	*	295	*
295	* @return The same as sys_ipc_call_async	296	* @return The same as sys_ipc_call_async
296	*/	297	*/
297	__native sys_ipc_call_async(__native phoneid, ipc_data_t *data)	298	__native sys_ipc_call_async(__native phoneid, ipc_data_t *data)
298	{	299	{
299	call_t *call;	300	call_t *call;
300	phone_t *phone;	301	phone_t *phone;
301	int res;	302	int res;
302	int rc;	303	int rc;
303		304
304	if (check_call_limit())	305	if (check_call_limit())
305	return IPC_CALLRET_TEMPORARY;	306	return IPC_CALLRET_TEMPORARY;
306		307
307	GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);	308	GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
308		309
309	call = ipc_call_alloc(0);	310	call = ipc_call_alloc(0);
310	rc = copy_from_uspace(&call->data.args, &data->args, sizeof(call->data.args));	311	rc = copy_from_uspace(&call->data.args, &data->args, sizeof(call->data.args));
311	if (rc != 0) {	312	if (rc != 0) {
312	ipc_call_free(call);	313	ipc_call_free(call);
313	return (__native) rc;	314	return (__native) rc;
314	}	315	}
315	if (!(res=request_preprocess(call)))	316	if (!(res=request_preprocess(call)))
316	ipc_call(phone, call);	317	ipc_call(phone, call);
317	else	318	else
318	ipc_backsend_err(phone, call, res);	319	ipc_backsend_err(phone, call, res);
319		320
320	return (__native) call;	321	return (__native) call;
321	}	322	}
322		323
323	/** Forward received call to another destination	324	/** Forward received call to another destination
324	*	325	*
325	* The arg1 and arg2 are changed in the forwarded message	326	* The arg1 and arg2 are changed in the forwarded message
326	*	327	*
327	* Warning: If implementing non-fast version, make sure that	328	* Warning: If implementing non-fast version, make sure that
328	* arg3 is not rewritten for certain system IPC	329	* arg3 is not rewritten for certain system IPC
329	*/	330	*/
330	__native sys_ipc_forward_fast(__native callid, __native phoneid,	331	__native sys_ipc_forward_fast(__native callid, __native phoneid,
331	__native method, __native arg1)	332	__native method, __native arg1)
332	{	333	{
333	call_t *call;	334	call_t *call;
334	phone_t *phone;	335	phone_t *phone;
335		336
336	call = get_call(callid);	337	call = get_call(callid);
337	if (!call)	338	if (!call)
338	return ENOENT;	339	return ENOENT;
339		340
340	call->flags \|= IPC_CALL_FORWARDED;	341	call->flags \|= IPC_CALL_FORWARDED;
341		342
342	GET_CHECK_PHONE(phone, phoneid, {	343	GET_CHECK_PHONE(phone, phoneid, {
343	IPC_SET_RETVAL(call->data, EFORWARD);	344	IPC_SET_RETVAL(call->data, EFORWARD);
344	ipc_answer(&TASK->answerbox, call);	345	ipc_answer(&TASK->answerbox, call);
345	return ENOENT;	346	return ENOENT;
346	});	347	});
347		348
348	if (!is_forwardable(IPC_GET_METHOD(call->data))) {	349	if (!is_forwardable(IPC_GET_METHOD(call->data))) {
349	IPC_SET_RETVAL(call->data, EFORWARD);	350	IPC_SET_RETVAL(call->data, EFORWARD);
350	ipc_answer(&TASK->answerbox, call);	351	ipc_answer(&TASK->answerbox, call);
351	return EPERM;	352	return EPERM;
352	}	353	}
353		354
354	/* Userspace is not allowed to change method of system methods	355	/* Userspace is not allowed to change method of system methods
355	* on forward, allow changing ARG1 and ARG2 by means of method and arg1	356	* on forward, allow changing ARG1 and ARG2 by means of method and arg1
356	*/	357	*/
357	if (is_system_method(IPC_GET_METHOD(call->data))) {	358	if (is_system_method(IPC_GET_METHOD(call->data))) {
358	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)	359	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)
359	phone_dealloc(IPC_GET_ARG3(call->data));	360	phone_dealloc(IPC_GET_ARG3(call->data));
360		361
361	IPC_SET_ARG1(call->data, method);	362	IPC_SET_ARG1(call->data, method);
362	IPC_SET_ARG2(call->data, arg1);	363	IPC_SET_ARG2(call->data, arg1);
363	} else {	364	} else {
364	IPC_SET_METHOD(call->data, method);	365	IPC_SET_METHOD(call->data, method);
365	IPC_SET_ARG1(call->data, arg1);	366	IPC_SET_ARG1(call->data, arg1);
366	}	367	}
367		368
368	return ipc_forward(call, phone, &TASK->answerbox);	369	return ipc_forward(call, phone, &TASK->answerbox);
369	}	370	}
370		371
371	/** Send IPC answer */	372	/** Send IPC answer */
372	__native sys_ipc_answer_fast(__native callid, __native retval,	373	__native sys_ipc_answer_fast(__native callid, __native retval,
373	__native arg1, __native arg2)	374	__native arg1, __native arg2)
374	{	375	{
375	call_t *call;	376	call_t *call;
376	ipc_data_t saved_data;	377	ipc_data_t saved_data;
377	int saveddata = 0;	378	int saveddata = 0;
378		379
379	call = get_call(callid);	380	call = get_call(callid);
380	if (!call)	381	if (!call)
381	return ENOENT;	382	return ENOENT;
382		383
383	if (answer_need_old(call)) {	384	if (answer_need_old(call)) {
384	memcpy(&saved_data, &call->data, sizeof(call->data));	385	memcpy(&saved_data, &call->data, sizeof(call->data));
385	saveddata = 1;	386	saveddata = 1;
386	}	387	}
387		388
388	IPC_SET_RETVAL(call->data, retval);	389	IPC_SET_RETVAL(call->data, retval);
389	IPC_SET_ARG1(call->data, arg1);	390	IPC_SET_ARG1(call->data, arg1);
390	IPC_SET_ARG2(call->data, arg2);	391	IPC_SET_ARG2(call->data, arg2);
391	answer_preprocess(call, saveddata ? &saved_data : NULL);	392	answer_preprocess(call, saveddata ? &saved_data : NULL);
392		393
393	ipc_answer(&TASK->answerbox, call);	394	ipc_answer(&TASK->answerbox, call);
394	return 0;	395	return 0;
395	}	396	}
396		397
397	/** Send IPC answer */	398	/** Send IPC answer */
398	__native sys_ipc_answer(__native callid, ipc_data_t *data)	399	__native sys_ipc_answer(__native callid, ipc_data_t *data)
399	{	400	{
400	call_t *call;	401	call_t *call;
401	ipc_data_t saved_data;	402	ipc_data_t saved_data;
402	int saveddata = 0;	403	int saveddata = 0;
403	int rc;	404	int rc;
404		405
405	call = get_call(callid);	406	call = get_call(callid);
406	if (!call)	407	if (!call)
407	return ENOENT;	408	return ENOENT;
408		409
409	if (answer_need_old(call)) {	410	if (answer_need_old(call)) {
410	memcpy(&saved_data, &call->data, sizeof(call->data));	411	memcpy(&saved_data, &call->data, sizeof(call->data));
411	saveddata = 1;	412	saveddata = 1;
412	}	413	}
413	rc = copy_from_uspace(&call->data.args, &data->args,	414	rc = copy_from_uspace(&call->data.args, &data->args,
414	sizeof(call->data.args));	415	sizeof(call->data.args));
415	if (rc != 0)	416	if (rc != 0)
416	return rc;	417	return rc;
417		418
418	answer_preprocess(call, saveddata ? &saved_data : NULL);	419	answer_preprocess(call, saveddata ? &saved_data : NULL);
419		420
420	ipc_answer(&TASK->answerbox, call);	421	ipc_answer(&TASK->answerbox, call);
421		422
422	return 0;	423	return 0;
423	}	424	}
424		425
425	/** Hang up the phone	426	/** Hang up the phone
426	*	427	*
427	*/	428	*/
428	__native sys_ipc_hangup(int phoneid)	429	__native sys_ipc_hangup(int phoneid)
429	{	430	{
430	phone_t *phone;	431	phone_t *phone;
431		432
432	GET_CHECK_PHONE(phone, phoneid, return ENOENT);	433	GET_CHECK_PHONE(phone, phoneid, return ENOENT);
433		434
434	if (ipc_phone_hangup(phone))	435	if (ipc_phone_hangup(phone))
435	return -1;	436	return -1;
436		437
437	return 0;	438	return 0;
438	}	439	}
439		440
440	/** Wait for incoming ipc call or answer	441	/** Wait for incoming ipc call or answer
441	*	442	*
442	* @param calldata Pointer to buffer where the call/answer data is stored	443	* @param calldata Pointer to buffer where the call/answer data is stored
443	* @param flags	444	* @param flags
444	* @return Callid, if callid & 1, then the call is answer	445	* @return Callid, if callid & 1, then the call is answer
445	*/	446	*/
446	__native sys_ipc_wait_for_call(ipc_data_t *calldata, __native flags)	447	__native sys_ipc_wait_for_call(ipc_data_t *calldata, __native flags)
447	{	448	{
448	call_t *call;	449	call_t *call;
449		450
450	restart:	451	restart:
451	call = ipc_wait_for_call(&TASK->answerbox, flags);	452	call = ipc_wait_for_call(&TASK->answerbox, flags);
452	if (!call)	453	if (!call)
453	return 0;	454	return 0;
454		455
455	if (call->flags & IPC_CALL_NOTIF) {	456	if (call->flags & IPC_CALL_NOTIF) {
456	ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC));	457	ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC));
457	STRUCT_TO_USPACE(&calldata->args, &call->data.args);	458	STRUCT_TO_USPACE(&calldata->args, &call->data.args);
458	ipc_call_free(call);	459	ipc_call_free(call);
459		460
460	return ((__native)call) \| IPC_CALLID_NOTIFICATION;	461	return ((__native)call) \| IPC_CALLID_NOTIFICATION;
461	}	462	}
462		463
463	if (call->flags & IPC_CALL_ANSWERED) {	464	if (call->flags & IPC_CALL_ANSWERED) {
464	process_answer(call);	465	process_answer(call);
465		466
466	ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC));	467	ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC));
467		468
468	atomic_dec(&TASK->active_calls);	469	atomic_dec(&TASK->active_calls);
469		470
470	if (call->flags & IPC_CALL_DISCARD_ANSWER) {	471	if (call->flags & IPC_CALL_DISCARD_ANSWER) {
471	ipc_call_free(call);	472	ipc_call_free(call);
472	goto restart;	473	goto restart;
473	}	474	}
474		475
475	STRUCT_TO_USPACE(&calldata->args, &call->data.args);	476	STRUCT_TO_USPACE(&calldata->args, &call->data.args);
476	ipc_call_free(call);	477	ipc_call_free(call);
477		478
478	return ((__native)call) \| IPC_CALLID_ANSWERED;	479	return ((__native)call) \| IPC_CALLID_ANSWERED;
479	}	480	}
480		481
481	if (process_request(&TASK->answerbox, call))	482	if (process_request(&TASK->answerbox, call))
482	goto restart;	483	goto restart;
483		484
484	/* Include phone address('id') of the caller in the request,	485	/* Include phone address('id') of the caller in the request,
485	* copy whole call->data, not only call->data.args */	486	* copy whole call->data, not only call->data.args */
486	STRUCT_TO_USPACE(calldata, &call->data);	487	STRUCT_TO_USPACE(calldata, &call->data);
487	return (__native)call;	488	return (__native)call;
488	}	489	}
489		490
490	/** Connect irq handler to task */	491	/** Connect irq handler to task */
491	__native sys_ipc_register_irq(__native irq, irq_code_t *ucode)	492	__native sys_ipc_register_irq(__native irq, irq_code_t *ucode)
492	{	493	{
-		494	if (!(cap_get(TASK) & CAP_IRQ_REG))
-		495	return EPERM;
-		496
493	if (irq >= IRQ_COUNT)	497	if (irq >= IRQ_COUNT)
494	return -ELIMIT;	498	return (__native) ELIMIT;
495		499
496	irq_ipc_bind_arch(irq);	500	irq_ipc_bind_arch(irq);

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/src/ipc/sysipc.c – Rev 1293 → 1297